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/fb.h>
  79 #include <asm/irq.h>
  80 #include <asm/system.h>
  81 #ifdef CONFIG_ATARI
  82 #include <asm/atariints.h>
  83 #endif
  84 #ifdef CONFIG_MAC
  85 #include <asm/macints.h>
  86 #endif
  87 #if defined(__mc68000__)
  88 #include <asm/machdep.h>
  89 #include <asm/setup.h>
  90 #endif
  91
  92 #include "fbcon.h"
  93
  94 #ifdef FBCONDEBUG
  95 #  define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __func__ , ## args)
  96 #else
  97 #  define DPRINTK(fmt, args...)
  98 #endif
  99
 100 enum {
 101         FBCON_LOGO_CANSHOW      = -1,   /* the logo can be shown */
 102         FBCON_LOGO_DRAW         = -2,   /* draw the logo to a console */
 103         FBCON_LOGO_DONTSHOW     = -3    /* do not show the logo */
 104 };
 105
 106 static struct display fb_display[MAX_NR_CONSOLES];
 107
 108 static signed char con2fb_map[MAX_NR_CONSOLES];
 109 static signed char con2fb_map_boot[MAX_NR_CONSOLES];
 110
 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 static int primary_device = -1;
 127
 128 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
 129 static int map_override;
 130
 131 static inline void fbcon_map_override(void)
 132 {
 133         map_override = 1;
 134 }
 135 #else
 136 static inline void fbcon_map_override(void)
 137 {
 138 }
 139 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY */
 140
 141 /* font data */
 142 static char fontname[40];
 143
 144 /* current fb_info */
 145 static int info_idx = -1;
 146
 147 /* console rotation */
 148 static int initial_rotation;
 149 static int fbcon_has_sysfs;
 150
 151 static const struct consw fb_con;
 152
 153 #define CM_SOFTBACK     (8)
 154
 155 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
 156
 157 static int fbcon_set_origin(struct vc_data *);
 158
 159 #define CURSOR_DRAW_DELAY               (1)
 160
 161 /* # VBL ints between cursor state changes */
 162 #define ATARI_CURSOR_BLINK_RATE         (42)
 163 #define MAC_CURSOR_BLINK_RATE           (32)
 164 #define DEFAULT_CURSOR_BLINK_RATE       (20)
 165
 166 static int vbl_cursor_cnt;
 167 static int fbcon_cursor_noblink;
 168
 169 #define divides(a, b)   ((!(a) || (b)%(a)) ? 0 : 1)
 170
 171 /*
 172  *  Interface used by the world
 173  */
 174
 175 static const char *fbcon_startup(void);
 176 static void fbcon_init(struct vc_data *vc, int init);
 177 static void fbcon_deinit(struct vc_data *vc);
 178 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
 179                         int width);
 180 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
 181 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
 182                         int count, int ypos, int xpos);
 183 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
 184 static void fbcon_cursor(struct vc_data *vc, int mode);
 185 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
 186                         int count);
 187 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
 188                         int height, int width);
 189 static int fbcon_switch(struct vc_data *vc);
 190 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
 191 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table);
 192 static int fbcon_scrolldelta(struct vc_data *vc, int lines);
 193
 194 /*
 195  *  Internal routines
 196  */
 197 static __inline__ void ywrap_up(struct vc_data *vc, int count);
 198 static __inline__ void ywrap_down(struct vc_data *vc, int count);
 199 static __inline__ void ypan_up(struct vc_data *vc, int count);
 200 static __inline__ void ypan_down(struct vc_data *vc, int count);
 201 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
 202                             int dy, int dx, int height, int width, u_int y_break);
 203 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
 204                            int unit);
 205 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
 206                               int line, int count, int dy);
 207 static void fbcon_modechanged(struct fb_info *info);
 208 static void fbcon_set_all_vcs(struct fb_info *info);
 209 static void fbcon_start(void);
 210 static void fbcon_exit(void);
 211 static struct device *fbcon_device;
 212
 213 #ifdef CONFIG_MAC
 214 /*
 215  * On the Macintoy, there may or may not be a working VBL int. We need to probe
 216  */
 217 static int vbl_detected;
 218
 219 static irqreturn_t fb_vbl_detect(int irq, void *dummy)
 220 {
 221         vbl_detected++;
 222         return IRQ_HANDLED;
 223 }
 224 #endif
 225
 226 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
 227 static inline void fbcon_set_rotation(struct fb_info *info)
 228 {
 229         struct fbcon_ops *ops = info->fbcon_par;
 230
 231         if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
 232             ops->p->con_rotate < 4)
 233                 ops->rotate = ops->p->con_rotate;
 234         else
 235                 ops->rotate = 0;
 236 }
 237
 238 static void fbcon_rotate(struct fb_info *info, u32 rotate)
 239 {
 240         struct fbcon_ops *ops= info->fbcon_par;
 241         struct fb_info *fb_info;
 242
 243         if (!ops || ops->currcon == -1)
 244                 return;
 245
 246         fb_info = registered_fb[con2fb_map[ops->currcon]];
 247
 248         if (info == fb_info) {
 249                 struct display *p = &fb_display[ops->currcon];
 250
 251                 if (rotate < 4)
 252                         p->con_rotate = rotate;
 253                 else
 254                         p->con_rotate = 0;
 255
 256                 fbcon_modechanged(info);
 257         }
 258 }
 259
 260 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
 261 {
 262         struct fbcon_ops *ops = info->fbcon_par;
 263         struct vc_data *vc;
 264         struct display *p;
 265         int i;
 266
 267         if (!ops || ops->currcon < 0 || rotate > 3)
 268                 return;
 269
 270         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 271                 vc = vc_cons[i].d;
 272                 if (!vc || vc->vc_mode != KD_TEXT ||
 273                     registered_fb[con2fb_map[i]] != info)
 274                         continue;
 275
 276                 p = &fb_display[vc->vc_num];
 277                 p->con_rotate = rotate;
 278         }
 279
 280         fbcon_set_all_vcs(info);
 281 }
 282 #else
 283 static inline void fbcon_set_rotation(struct fb_info *info)
 284 {
 285         struct fbcon_ops *ops = info->fbcon_par;
 286
 287         ops->rotate = FB_ROTATE_UR;
 288 }
 289
 290 static void fbcon_rotate(struct fb_info *info, u32 rotate)
 291 {
 292         return;
 293 }
 294
 295 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
 296 {
 297         return;
 298 }
 299 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
 300
 301 static int fbcon_get_rotate(struct fb_info *info)
 302 {
 303         struct fbcon_ops *ops = info->fbcon_par;
 304
 305         return (ops) ? ops->rotate : 0;
 306 }
 307
 308 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
 309 {
 310         struct fbcon_ops *ops = info->fbcon_par;
 311
 312         return (info->state != FBINFO_STATE_RUNNING ||
 313                 vc->vc_mode != KD_TEXT || ops->graphics);
 314 }
 315
 316 static inline int get_color(struct vc_data *vc, struct fb_info *info,
 317               u16 c, int is_fg)
 318 {
 319         int depth = fb_get_color_depth(&info->var, &info->fix);
 320         int color = 0;
 321
 322         if (console_blanked) {
 323                 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
 324
 325                 c = vc->vc_video_erase_char & charmask;
 326         }
 327
 328         if (depth != 1)
 329                 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
 330                         : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
 331
 332         switch (depth) {
 333         case 1:
 334         {
 335                 int col = mono_col(info);
 336                 /* 0 or 1 */
 337                 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
 338                 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
 339
 340                 if (console_blanked)
 341                         fg = bg;
 342
 343                 color = (is_fg) ? fg : bg;
 344                 break;
 345         }
 346         case 2:
 347                 /*
 348                  * Scale down 16-colors to 4 colors. Default 4-color palette
 349                  * is grayscale. However, simply dividing the values by 4
 350                  * will not work, as colors 1, 2 and 3 will be scaled-down
 351                  * to zero rendering them invisible.  So empirically convert
 352                  * colors to a sane 4-level grayscale.
 353                  */
 354                 switch (color) {
 355                 case 0:
 356                         color = 0; /* black */
 357                         break;
 358                 case 1 ... 6:
 359                         color = 2; /* white */
 360                         break;
 361                 case 7 ... 8:
 362                         color = 1; /* gray */
 363                         break;
 364                 default:
 365                         color = 3; /* intense white */
 366                         break;
 367                 }
 368                 break;
 369         case 3:
 370                 /*
 371                  * Last 8 entries of default 16-color palette is a more intense
 372                  * version of the first 8 (i.e., same chrominance, different
 373                  * luminance).
 374                  */
 375                 color &= 7;
 376                 break;
 377         }
 378
 379
 380         return color;
 381 }
 382
 383 static void fbcon_update_softback(struct vc_data *vc)
 384 {
 385         int l = fbcon_softback_size / vc->vc_size_row;
 386
 387         if (l > 5)
 388                 softback_end = softback_buf + l * vc->vc_size_row;
 389         else
 390                 /* Smaller scrollback makes no sense, and 0 would screw
 391                    the operation totally */
 392                 softback_top = 0;
 393 }
 394
 395 static void fb_flashcursor(struct work_struct *work)
 396 {
 397         struct fb_info *info = container_of(work, struct fb_info, queue);
 398         struct fbcon_ops *ops = info->fbcon_par;
 399         struct display *p;
 400         struct vc_data *vc = NULL;
 401         int c;
 402         int mode;
 403
 404         acquire_console_sem();
 405         if (ops && ops->currcon != -1)
 406                 vc = vc_cons[ops->currcon].d;
 407
 408         if (!vc || !CON_IS_VISIBLE(vc) ||
 409             registered_fb[con2fb_map[vc->vc_num]] != info ||
 410             vc->vc_deccm != 1) {
 411                 release_console_sem();
 412                 return;
 413         }
 414
 415         p = &fb_display[vc->vc_num];
 416         c = scr_readw((u16 *) vc->vc_pos);
 417         mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
 418                 CM_ERASE : CM_DRAW;
 419         ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
 420                     get_color(vc, info, c, 0));
 421         release_console_sem();
 422 }
 423
 424 #if defined(CONFIG_ATARI) || defined(CONFIG_MAC)
 425 static int cursor_blink_rate;
 426 static irqreturn_t fb_vbl_handler(int irq, void *dev_id)
 427 {
 428         struct fb_info *info = dev_id;
 429
 430         if (vbl_cursor_cnt && --vbl_cursor_cnt == 0) {
 431                 schedule_work(&info->queue);
 432                 vbl_cursor_cnt = cursor_blink_rate;
 433         }
 434         return IRQ_HANDLED;
 435 }
 436 #endif
 437
 438 static void cursor_timer_handler(unsigned long dev_addr)
 439 {
 440         struct fb_info *info = (struct fb_info *) dev_addr;
 441         struct fbcon_ops *ops = info->fbcon_par;
 442
 443         schedule_work(&info->queue);
 444         mod_timer(&ops->cursor_timer, jiffies + HZ/5);
 445 }
 446
 447 static void fbcon_add_cursor_timer(struct fb_info *info)
 448 {
 449         struct fbcon_ops *ops = info->fbcon_par;
 450
 451         if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
 452             !(ops->flags & FBCON_FLAGS_CURSOR_TIMER) &&
 453             !fbcon_cursor_noblink) {
 454                 if (!info->queue.func)
 455                         INIT_WORK(&info->queue, fb_flashcursor);
 456
 457                 init_timer(&ops->cursor_timer);
 458                 ops->cursor_timer.function = cursor_timer_handler;
 459                 ops->cursor_timer.expires = jiffies + HZ / 5;
 460                 ops->cursor_timer.data = (unsigned long ) info;
 461                 add_timer(&ops->cursor_timer);
 462                 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
 463         }
 464 }
 465
 466 static void fbcon_del_cursor_timer(struct fb_info *info)
 467 {
 468         struct fbcon_ops *ops = info->fbcon_par;
 469
 470         if (info->queue.func == fb_flashcursor &&
 471             ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
 472                 del_timer_sync(&ops->cursor_timer);
 473                 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
 474         }
 475 }
 476
 477 #ifndef MODULE
 478 static int __init fb_console_setup(char *this_opt)
 479 {
 480         char *options;
 481         int i, j;
 482
 483         if (!this_opt || !*this_opt)
 484                 return 1;
 485
 486         while ((options = strsep(&this_opt, ",")) != NULL) {
 487                 if (!strncmp(options, "font:", 5))
 488                         strcpy(fontname, options + 5);
 489
 490                 if (!strncmp(options, "scrollback:", 11)) {
 491                         options += 11;
 492                         if (*options) {
 493                                 fbcon_softback_size = simple_strtoul(options, &options, 0);
 494                                 if (*options == 'k' || *options == 'K') {
 495                                         fbcon_softback_size *= 1024;
 496                                         options++;
 497                                 }
 498                                 if (*options != ',')
 499                                         return 1;
 500                                 options++;
 501                         } else
 502                                 return 1;
 503                 }
 504
 505                 if (!strncmp(options, "map:", 4)) {
 506                         options += 4;
 507                         if (*options) {
 508                                 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
 509                                         if (!options[j])
 510                                                 j = 0;
 511                                         con2fb_map_boot[i] =
 512                                                 (options[j++]-'0') % FB_MAX;
 513                                 }
 514
 515                                 fbcon_map_override();
 516                         }
 517
 518                         return 1;
 519                 }
 520
 521                 if (!strncmp(options, "vc:", 3)) {
 522                         options += 3;
 523                         if (*options)
 524                                 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
 525                         if (first_fb_vc < 0)
 526                                 first_fb_vc = 0;
 527                         if (*options++ == '-')
 528                                 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
 529                         fbcon_is_default = 0;
 530                 }
 531
 532                 if (!strncmp(options, "rotate:", 7)) {
 533                         options += 7;
 534                         if (*options)
 535                                 initial_rotation = simple_strtoul(options, &options, 0);
 536                         if (initial_rotation > 3)
 537                                 initial_rotation = 0;
 538                 }
 539         }
 540         return 1;
 541 }
 542
 543 __setup("fbcon=", fb_console_setup);
 544 #endif
 545
 546 static int search_fb_in_map(int idx)
 547 {
 548         int i, retval = 0;
 549
 550         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 551                 if (con2fb_map[i] == idx)
 552                         retval = 1;
 553         }
 554         return retval;
 555 }
 556
 557 static int search_for_mapped_con(void)
 558 {
 559         int i, retval = 0;
 560
 561         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 562                 if (con2fb_map[i] != -1)
 563                         retval = 1;
 564         }
 565         return retval;
 566 }
 567
 568 static int fbcon_takeover(int show_logo)
 569 {
 570         int err, i;
 571
 572         if (!num_registered_fb)
 573                 return -ENODEV;
 574
 575         if (!show_logo)
 576                 logo_shown = FBCON_LOGO_DONTSHOW;
 577
 578         for (i = first_fb_vc; i <= last_fb_vc; i++)
 579                 con2fb_map[i] = info_idx;
 580
 581         err = take_over_console(&fb_con, first_fb_vc, last_fb_vc,
 582                                 fbcon_is_default);
 583
 584         if (err) {
 585                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
 586                         con2fb_map[i] = -1;
 587                 }
 588                 info_idx = -1;
 589         }
 590
 591         return err;
 592 }
 593
 594 #ifdef MODULE
 595 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
 596                                int cols, int rows, int new_cols, int new_rows)
 597 {
 598         logo_shown = FBCON_LOGO_DONTSHOW;
 599 }
 600 #else
 601 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
 602                                int cols, int rows, int new_cols, int new_rows)
 603 {
 604         /* Need to make room for the logo */
 605         struct fbcon_ops *ops = info->fbcon_par;
 606         int cnt, erase = vc->vc_video_erase_char, step;
 607         unsigned short *save = NULL, *r, *q;
 608         int logo_height;
 609
 610         if (info->flags & FBINFO_MODULE) {
 611                 logo_shown = FBCON_LOGO_DONTSHOW;
 612                 return;
 613         }
 614
 615         /*
 616          * remove underline attribute from erase character
 617          * if black and white framebuffer.
 618          */
 619         if (fb_get_color_depth(&info->var, &info->fix) == 1)
 620                 erase &= ~0x400;
 621         logo_height = fb_prepare_logo(info, ops->rotate);
 622         logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height);
 623         q = (unsigned short *) (vc->vc_origin +
 624                                 vc->vc_size_row * rows);
 625         step = logo_lines * cols;
 626         for (r = q - logo_lines * cols; r < q; r++)
 627                 if (scr_readw(r) != vc->vc_video_erase_char)
 628                         break;
 629         if (r != q && new_rows >= rows + logo_lines) {
 630                 save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
 631                 if (save) {
 632                         int i = cols < new_cols ? cols : new_cols;
 633                         scr_memsetw(save, erase, logo_lines * new_cols * 2);
 634                         r = q - step;
 635                         for (cnt = 0; cnt < logo_lines; cnt++, r += i)
 636                                 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
 637                         r = q;
 638                 }
 639         }
 640         if (r == q) {
 641                 /* We can scroll screen down */
 642                 r = q - step - cols;
 643                 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
 644                         scr_memcpyw(r + step, r, vc->vc_size_row);
 645                         r -= cols;
 646                 }
 647                 if (!save) {
 648                         int lines;
 649                         if (vc->vc_y + logo_lines >= rows)
 650                                 lines = rows - vc->vc_y - 1;
 651                         else
 652                                 lines = logo_lines;
 653                         vc->vc_y += lines;
 654                         vc->vc_pos += lines * vc->vc_size_row;
 655                 }
 656         }
 657         scr_memsetw((unsigned short *) vc->vc_origin,
 658                     erase,
 659                     vc->vc_size_row * logo_lines);
 660
 661         if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
 662                 fbcon_clear_margins(vc, 0);
 663                 update_screen(vc);
 664         }
 665
 666         if (save) {
 667                 q = (unsigned short *) (vc->vc_origin +
 668                                         vc->vc_size_row *
 669                                         rows);
 670                 scr_memcpyw(q, save, logo_lines * new_cols * 2);
 671                 vc->vc_y += logo_lines;
 672                 vc->vc_pos += logo_lines * vc->vc_size_row;
 673                 kfree(save);
 674         }
 675
 676         if (logo_lines > vc->vc_bottom) {
 677                 logo_shown = FBCON_LOGO_CANSHOW;
 678                 printk(KERN_INFO
 679                        "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
 680         } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
 681                 logo_shown = FBCON_LOGO_DRAW;
 682                 vc->vc_top = logo_lines;
 683         }
 684 }
 685 #endif /* MODULE */
 686
 687 #ifdef CONFIG_FB_TILEBLITTING
 688 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
 689 {
 690         struct fbcon_ops *ops = info->fbcon_par;
 691
 692         ops->p = &fb_display[vc->vc_num];
 693
 694         if ((info->flags & FBINFO_MISC_TILEBLITTING))
 695                 fbcon_set_tileops(vc, info);
 696         else {
 697                 fbcon_set_rotation(info);
 698                 fbcon_set_bitops(ops);
 699         }
 700 }
 701
 702 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
 703 {
 704         int err = 0;
 705
 706         if (info->flags & FBINFO_MISC_TILEBLITTING &&
 707             info->tileops->fb_get_tilemax(info) < charcount)
 708                 err = 1;
 709
 710         return err;
 711 }
 712 #else
 713 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
 714 {
 715         struct fbcon_ops *ops = info->fbcon_par;
 716
 717         info->flags &= ~FBINFO_MISC_TILEBLITTING;
 718         ops->p = &fb_display[vc->vc_num];
 719         fbcon_set_rotation(info);
 720         fbcon_set_bitops(ops);
 721 }
 722
 723 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
 724 {
 725         return 0;
 726 }
 727
 728 #endif /* CONFIG_MISC_TILEBLITTING */
 729
 730
 731 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
 732                                   int unit, int oldidx)
 733 {
 734         struct fbcon_ops *ops = NULL;
 735         int err = 0;
 736
 737         if (!try_module_get(info->fbops->owner))
 738                 err = -ENODEV;
 739
 740         if (!err && info->fbops->fb_open &&
 741             info->fbops->fb_open(info, 0))
 742                 err = -ENODEV;
 743
 744         if (!err) {
 745                 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
 746                 if (!ops)
 747                         err = -ENOMEM;
 748         }
 749
 750         if (!err) {
 751                 info->fbcon_par = ops;
 752
 753                 if (vc)
 754                         set_blitting_type(vc, info);
 755         }
 756
 757         if (err) {
 758                 con2fb_map[unit] = oldidx;
 759                 module_put(info->fbops->owner);
 760         }
 761
 762         return err;
 763 }
 764
 765 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
 766                                   struct fb_info *newinfo, int unit,
 767                                   int oldidx, int found)
 768 {
 769         struct fbcon_ops *ops = oldinfo->fbcon_par;
 770         int err = 0;
 771
 772         if (oldinfo->fbops->fb_release &&
 773             oldinfo->fbops->fb_release(oldinfo, 0)) {
 774                 con2fb_map[unit] = oldidx;
 775                 if (!found && newinfo->fbops->fb_release)
 776                         newinfo->fbops->fb_release(newinfo, 0);
 777                 if (!found)
 778                         module_put(newinfo->fbops->owner);
 779                 err = -ENODEV;
 780         }
 781
 782         if (!err) {
 783                 fbcon_del_cursor_timer(oldinfo);
 784                 kfree(ops->cursor_state.mask);
 785                 kfree(ops->cursor_data);
 786                 kfree(ops->fontbuffer);
 787                 kfree(oldinfo->fbcon_par);
 788                 oldinfo->fbcon_par = NULL;
 789                 module_put(oldinfo->fbops->owner);
 790                 /*
 791                   If oldinfo and newinfo are driving the same hardware,
 792                   the fb_release() method of oldinfo may attempt to
 793                   restore the hardware state.  This will leave the
 794                   newinfo in an undefined state. Thus, a call to
 795                   fb_set_par() may be needed for the newinfo.
 796                 */
 797                 if (newinfo->fbops->fb_set_par)
 798                         newinfo->fbops->fb_set_par(newinfo);
 799         }
 800
 801         return err;
 802 }
 803
 804 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
 805                                 int unit, int show_logo)
 806 {
 807         struct fbcon_ops *ops = info->fbcon_par;
 808
 809         ops->currcon = fg_console;
 810
 811         if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT))
 812                 info->fbops->fb_set_par(info);
 813
 814         ops->flags |= FBCON_FLAGS_INIT;
 815         ops->graphics = 0;
 816         fbcon_set_disp(info, &info->var, unit);
 817
 818         if (show_logo) {
 819                 struct vc_data *fg_vc = vc_cons[fg_console].d;
 820                 struct fb_info *fg_info =
 821                         registered_fb[con2fb_map[fg_console]];
 822
 823                 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
 824                                    fg_vc->vc_rows, fg_vc->vc_cols,
 825                                    fg_vc->vc_rows);
 826         }
 827
 828         update_screen(vc_cons[fg_console].d);
 829 }
 830
 831 /**
 832  *      set_con2fb_map - map console to frame buffer device
 833  *      @unit: virtual console number to map
 834  *      @newidx: frame buffer index to map virtual console to
 835  *      @user: user request
 836  *
 837  *      Maps a virtual console @unit to a frame buffer device
 838  *      @newidx.
 839  */
 840 static int set_con2fb_map(int unit, int newidx, int user)
 841 {
 842         struct vc_data *vc = vc_cons[unit].d;
 843         int oldidx = con2fb_map[unit];
 844         struct fb_info *info = registered_fb[newidx];
 845         struct fb_info *oldinfo = NULL;
 846         int found, err = 0;
 847
 848         if (oldidx == newidx)
 849                 return 0;
 850
 851         if (!info || fbcon_has_exited)
 852                 return -EINVAL;
 853
 854         if (!err && !search_for_mapped_con()) {
 855                 info_idx = newidx;
 856                 return fbcon_takeover(0);
 857         }
 858
 859         if (oldidx != -1)
 860                 oldinfo = registered_fb[oldidx];
 861
 862         found = search_fb_in_map(newidx);
 863
 864         acquire_console_sem();
 865         con2fb_map[unit] = newidx;
 866         if (!err && !found)
 867                 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
 868
 869
 870         /*
 871          * If old fb is not mapped to any of the consoles,
 872          * fbcon should release it.
 873          */
 874         if (!err && oldinfo && !search_fb_in_map(oldidx))
 875                 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
 876                                              found);
 877
 878         if (!err) {
 879                 int show_logo = (fg_console == 0 && !user &&
 880                                  logo_shown != FBCON_LOGO_DONTSHOW);
 881
 882                 if (!found)
 883                         fbcon_add_cursor_timer(info);
 884                 con2fb_map_boot[unit] = newidx;
 885                 con2fb_init_display(vc, info, unit, show_logo);
 886         }
 887
 888         if (!search_fb_in_map(info_idx))
 889                 info_idx = newidx;
 890
 891         release_console_sem();
 892         return err;
 893 }
 894
 895 /*
 896  *  Low Level Operations
 897  */
 898 /* NOTE: fbcon cannot be __init: it may be called from take_over_console later */
 899 static int var_to_display(struct display *disp,
 900                           struct fb_var_screeninfo *var,
 901                           struct fb_info *info)
 902 {
 903         disp->xres_virtual = var->xres_virtual;
 904         disp->yres_virtual = var->yres_virtual;
 905         disp->bits_per_pixel = var->bits_per_pixel;
 906         disp->grayscale = var->grayscale;
 907         disp->nonstd = var->nonstd;
 908         disp->accel_flags = var->accel_flags;
 909         disp->height = var->height;
 910         disp->width = var->width;
 911         disp->red = var->red;
 912         disp->green = var->green;
 913         disp->blue = var->blue;
 914         disp->transp = var->transp;
 915         disp->rotate = var->rotate;
 916         disp->mode = fb_match_mode(var, &info->modelist);
 917         if (disp->mode == NULL)
 918                 /* This should not happen */
 919                 return -EINVAL;
 920         return 0;
 921 }
 922
 923 static void display_to_var(struct fb_var_screeninfo *var,
 924                            struct display *disp)
 925 {
 926         fb_videomode_to_var(var, disp->mode);
 927         var->xres_virtual = disp->xres_virtual;
 928         var->yres_virtual = disp->yres_virtual;
 929         var->bits_per_pixel = disp->bits_per_pixel;
 930         var->grayscale = disp->grayscale;
 931         var->nonstd = disp->nonstd;
 932         var->accel_flags = disp->accel_flags;
 933         var->height = disp->height;
 934         var->width = disp->width;
 935         var->red = disp->red;
 936         var->green = disp->green;
 937         var->blue = disp->blue;
 938         var->transp = disp->transp;
 939         var->rotate = disp->rotate;
 940 }
 941
 942 static const char *fbcon_startup(void)
 943 {
 944         const char *display_desc = "frame buffer device";
 945         struct display *p = &fb_display[fg_console];
 946         struct vc_data *vc = vc_cons[fg_console].d;
 947         const struct font_desc *font = NULL;
 948         struct module *owner;
 949         struct fb_info *info = NULL;
 950         struct fbcon_ops *ops;
 951         int rows, cols;
 952         int irqres;
 953
 954         irqres = 1;
 955         /*
 956          *  If num_registered_fb is zero, this is a call for the dummy part.
 957          *  The frame buffer devices weren't initialized yet.
 958          */
 959         if (!num_registered_fb || info_idx == -1)
 960                 return display_desc;
 961         /*
 962          * Instead of blindly using registered_fb[0], we use info_idx, set by
 963          * fb_console_init();
 964          */
 965         info = registered_fb[info_idx];
 966         if (!info)
 967                 return NULL;
 968
 969         owner = info->fbops->owner;
 970         if (!try_module_get(owner))
 971                 return NULL;
 972         if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
 973                 module_put(owner);
 974                 return NULL;
 975         }
 976
 977         ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
 978         if (!ops) {
 979                 module_put(owner);
 980                 return NULL;
 981         }
 982
 983         ops->currcon = -1;
 984         ops->graphics = 1;
 985         ops->cur_rotate = -1;
 986         info->fbcon_par = ops;
 987         p->con_rotate = initial_rotation;
 988         set_blitting_type(vc, info);
 989
 990         if (info->fix.type != FB_TYPE_TEXT) {
 991                 if (fbcon_softback_size) {
 992                         if (!softback_buf) {
 993                                 softback_buf =
 994                                     (unsigned long)
 995                                     kmalloc(fbcon_softback_size,
 996                                             GFP_KERNEL);
 997                                 if (!softback_buf) {
 998                                         fbcon_softback_size = 0;
 999                                         softback_top = 0;
1000                                 }
1001                         }
1002                 } else {
1003                         if (softback_buf) {
1004                                 kfree((void *) softback_buf);
1005                                 softback_buf = 0;
1006                                 softback_top = 0;
1007                         }
1008                 }
1009                 if (softback_buf)
1010                         softback_in = softback_top = softback_curr =
1011                             softback_buf;
1012                 softback_lines = 0;
1013         }
1014
1015         /* Setup default font */
1016         if (!p->fontdata) {
1017                 if (!fontname[0] || !(font = find_font(fontname)))
1018                         font = get_default_font(info->var.xres,
1019                                                 info->var.yres,
1020                                                 info->pixmap.blit_x,
1021                                                 info->pixmap.blit_y);
1022                 vc->vc_font.width = font->width;
1023                 vc->vc_font.height = font->height;
1024                 vc->vc_font.data = (void *)(p->fontdata = font->data);
1025                 vc->vc_font.charcount = 256; /* FIXME  Need to support more fonts */
1026         }
1027
1028         cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1029         rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1030         cols /= vc->vc_font.width;
1031         rows /= vc->vc_font.height;
1032         vc_resize(vc, cols, rows);
1033
1034         DPRINTK("mode:   %s\n", info->fix.id);
1035         DPRINTK("visual: %d\n", info->fix.visual);
1036         DPRINTK("res:    %dx%d-%d\n", info->var.xres,
1037                 info->var.yres,
1038                 info->var.bits_per_pixel);
1039
1040 #ifdef CONFIG_ATARI
1041         if (MACH_IS_ATARI) {
1042                 cursor_blink_rate = ATARI_CURSOR_BLINK_RATE;
1043                 irqres =
1044                     request_irq(IRQ_AUTO_4, fb_vbl_handler,
1045                                 IRQ_TYPE_PRIO, "framebuffer vbl",
1046                                 info);
1047         }
1048 #endif                          /* CONFIG_ATARI */
1049
1050 #ifdef CONFIG_MAC
1051         /*
1052          * On a Macintoy, the VBL interrupt may or may not be active.
1053          * As interrupt based cursor is more reliable and race free, we
1054          * probe for VBL interrupts.
1055          */
1056         if (MACH_IS_MAC) {
1057                 int ct = 0;
1058                 /*
1059                  * Probe for VBL: set temp. handler ...
1060                  */
1061                 irqres = request_irq(IRQ_MAC_VBL, fb_vbl_detect, 0,
1062                                      "framebuffer vbl", info);
1063                 vbl_detected = 0;
1064
1065                 /*
1066                  * ... and spin for 20 ms ...
1067                  */
1068                 while (!vbl_detected && ++ct < 1000)
1069                         udelay(20);
1070
1071                 if (ct == 1000)
1072                         printk
1073                             ("fbcon_startup: No VBL detected, using timer based cursor.\n");
1074
1075                 free_irq(IRQ_MAC_VBL, fb_vbl_detect);
1076
1077                 if (vbl_detected) {
1078                         /*
1079                          * interrupt based cursor ok
1080                          */
1081                         cursor_blink_rate = MAC_CURSOR_BLINK_RATE;
1082                         irqres =
1083                             request_irq(IRQ_MAC_VBL, fb_vbl_handler, 0,
1084                                         "framebuffer vbl", info);
1085                 } else {
1086                         /*
1087                          * VBL not detected: fall through, use timer based cursor
1088                          */
1089                         irqres = 1;
1090                 }
1091         }
1092 #endif                          /* CONFIG_MAC */
1093
1094         fbcon_add_cursor_timer(info);
1095         fbcon_has_exited = 0;
1096         return display_desc;
1097 }
1098
1099 static void fbcon_init(struct vc_data *vc, int init)
1100 {
1101         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1102         struct fbcon_ops *ops;
1103         struct vc_data **default_mode = vc->vc_display_fg;
1104         struct vc_data *svc = *default_mode;
1105         struct display *t, *p = &fb_display[vc->vc_num];
1106         int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
1107         int cap;
1108
1109         if (info_idx == -1 || info == NULL)
1110             return;
1111
1112         cap = info->flags;
1113
1114         if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1115             (info->fix.type == FB_TYPE_TEXT))
1116                 logo = 0;
1117
1118         if (var_to_display(p, &info->var, info))
1119                 return;
1120
1121         if (!info->fbcon_par)
1122                 con2fb_acquire_newinfo(vc, info, vc->vc_num, -1);
1123
1124         /* If we are not the first console on this
1125            fb, copy the font from that console */
1126         t = &fb_display[fg_console];
1127         if (!p->fontdata) {
1128                 if (t->fontdata) {
1129                         struct vc_data *fvc = vc_cons[fg_console].d;
1130
1131                         vc->vc_font.data = (void *)(p->fontdata =
1132                                                     fvc->vc_font.data);
1133                         vc->vc_font.width = fvc->vc_font.width;
1134                         vc->vc_font.height = fvc->vc_font.height;
1135                         p->userfont = t->userfont;
1136
1137                         if (p->userfont)
1138                                 REFCOUNT(p->fontdata)++;
1139                 } else {
1140                         const struct font_desc *font = NULL;
1141
1142                         if (!fontname[0] || !(font = find_font(fontname)))
1143                                 font = get_default_font(info->var.xres,
1144                                                         info->var.yres,
1145                                                         info->pixmap.blit_x,
1146                                                         info->pixmap.blit_y);
1147                         vc->vc_font.width = font->width;
1148                         vc->vc_font.height = font->height;
1149                         vc->vc_font.data = (void *)(p->fontdata = font->data);
1150                         vc->vc_font.charcount = 256; /* FIXME  Need to
1151                                                         support more fonts */
1152                 }
1153         }
1154
1155         if (p->userfont)
1156                 charcnt = FNTCHARCNT(p->fontdata);
1157
1158         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1159         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1160         if (charcnt == 256) {
1161                 vc->vc_hi_font_mask = 0;
1162         } else {
1163                 vc->vc_hi_font_mask = 0x100;
1164                 if (vc->vc_can_do_color)
1165                         vc->vc_complement_mask <<= 1;
1166         }
1167
1168         if (!*svc->vc_uni_pagedir_loc)
1169                 con_set_default_unimap(svc);
1170         if (!*vc->vc_uni_pagedir_loc)
1171                 con_copy_unimap(vc, svc);
1172
1173         ops = info->fbcon_par;
1174         p->con_rotate = initial_rotation;
1175         set_blitting_type(vc, info);
1176
1177         cols = vc->vc_cols;
1178         rows = vc->vc_rows;
1179         new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1180         new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1181         new_cols /= vc->vc_font.width;
1182         new_rows /= vc->vc_font.height;
1183         vc_resize(vc, new_cols, new_rows);
1184
1185         /*
1186          * We must always set the mode. The mode of the previous console
1187          * driver could be in the same resolution but we are using different
1188          * hardware so we have to initialize the hardware.
1189          *
1190          * We need to do it in fbcon_init() to prevent screen corruption.
1191          */
1192         if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
1193                 if (info->fbops->fb_set_par &&
1194                     !(ops->flags & FBCON_FLAGS_INIT))
1195                         info->fbops->fb_set_par(info);
1196                 ops->flags |= FBCON_FLAGS_INIT;
1197         }
1198
1199         ops->graphics = 0;
1200
1201         if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1202             !(cap & FBINFO_HWACCEL_DISABLED))
1203                 p->scrollmode = SCROLL_MOVE;
1204         else /* default to something safe */
1205                 p->scrollmode = SCROLL_REDRAW;
1206
1207         /*
1208          *  ++guenther: console.c:vc_allocate() relies on initializing
1209          *  vc_{cols,rows}, but we must not set those if we are only
1210          *  resizing the console.
1211          */
1212         if (!init) {
1213                 vc->vc_cols = new_cols;
1214                 vc->vc_rows = new_rows;
1215         }
1216
1217         if (logo)
1218                 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1219
1220         if (vc == svc && softback_buf)
1221                 fbcon_update_softback(vc);
1222
1223         if (ops->rotate_font && ops->rotate_font(info, vc)) {
1224                 ops->rotate = FB_ROTATE_UR;
1225                 set_blitting_type(vc, info);
1226         }
1227
1228         ops->p = &fb_display[fg_console];
1229 }
1230
1231 static void fbcon_free_font(struct display *p)
1232 {
1233         if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1234                 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1235         p->fontdata = NULL;
1236         p->userfont = 0;
1237 }
1238
1239 static void fbcon_deinit(struct vc_data *vc)
1240 {
1241         struct display *p = &fb_display[vc->vc_num];
1242         struct fb_info *info;
1243         struct fbcon_ops *ops;
1244         int idx;
1245
1246         fbcon_free_font(p);
1247         idx = con2fb_map[vc->vc_num];
1248
1249         if (idx == -1)
1250                 goto finished;
1251
1252         info = registered_fb[idx];
1253
1254         if (!info)
1255                 goto finished;
1256
1257         ops = info->fbcon_par;
1258
1259         if (!ops)
1260                 goto finished;
1261
1262         if (CON_IS_VISIBLE(vc))
1263                 fbcon_del_cursor_timer(info);
1264
1265         ops->flags &= ~FBCON_FLAGS_INIT;
1266 finished:
1267
1268         if (!con_is_bound(&fb_con))
1269                 fbcon_exit();
1270
1271         return;
1272 }
1273
1274 /* ====================================================================== */
1275
1276 /*  fbcon_XXX routines - interface used by the world
1277  *
1278  *  This system is now divided into two levels because of complications
1279  *  caused by hardware scrolling. Top level functions:
1280  *
1281  *      fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1282  *
1283  *  handles y values in range [0, scr_height-1] that correspond to real
1284  *  screen positions. y_wrap shift means that first line of bitmap may be
1285  *  anywhere on this display. These functions convert lineoffsets to
1286  *  bitmap offsets and deal with the wrap-around case by splitting blits.
1287  *
1288  *      fbcon_bmove_physical_8()    -- These functions fast implementations
1289  *      fbcon_clear_physical_8()    -- of original fbcon_XXX fns.
1290  *      fbcon_putc_physical_8()     -- (font width != 8) may be added later
1291  *
1292  *  WARNING:
1293  *
1294  *  At the moment fbcon_putc() cannot blit across vertical wrap boundary
1295  *  Implies should only really hardware scroll in rows. Only reason for
1296  *  restriction is simplicity & efficiency at the moment.
1297  */
1298
1299 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1300                         int width)
1301 {
1302         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1303         struct fbcon_ops *ops = info->fbcon_par;
1304
1305         struct display *p = &fb_display[vc->vc_num];
1306         u_int y_break;
1307
1308         if (fbcon_is_inactive(vc, info))
1309                 return;
1310
1311         if (!height || !width)
1312                 return;
1313
1314         if (sy < vc->vc_top && vc->vc_top == logo_lines)
1315                 vc->vc_top = 0;
1316
1317         /* Split blits that cross physical y_wrap boundary */
1318
1319         y_break = p->vrows - p->yscroll;
1320         if (sy < y_break && sy + height - 1 >= y_break) {
1321                 u_int b = y_break - sy;
1322                 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1323                 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1324                                  width);
1325         } else
1326                 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1327 }
1328
1329 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1330                         int count, int ypos, int xpos)
1331 {
1332         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1333         struct display *p = &fb_display[vc->vc_num];
1334         struct fbcon_ops *ops = info->fbcon_par;
1335
1336         if (!fbcon_is_inactive(vc, info))
1337                 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1338                            get_color(vc, info, scr_readw(s), 1),
1339                            get_color(vc, info, scr_readw(s), 0));
1340 }
1341
1342 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1343 {
1344         unsigned short chr;
1345
1346         scr_writew(c, &chr);
1347         fbcon_putcs(vc, &chr, 1, ypos, xpos);
1348 }
1349
1350 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1351 {
1352         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1353         struct fbcon_ops *ops = info->fbcon_par;
1354
1355         if (!fbcon_is_inactive(vc, info))
1356                 ops->clear_margins(vc, info, bottom_only);
1357 }
1358
1359 static void fbcon_cursor(struct vc_data *vc, int mode)
1360 {
1361         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1362         struct fbcon_ops *ops = info->fbcon_par;
1363         int y;
1364         int c = scr_readw((u16 *) vc->vc_pos);
1365
1366         if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
1367                 return;
1368
1369         if (vc->vc_cursor_type & 0x10)
1370                 fbcon_del_cursor_timer(info);
1371         else
1372                 fbcon_add_cursor_timer(info);
1373
1374         ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1375         if (mode & CM_SOFTBACK) {
1376                 mode &= ~CM_SOFTBACK;
1377                 y = softback_lines;
1378         } else {
1379                 if (softback_lines)
1380                         fbcon_set_origin(vc);
1381                 y = 0;
1382         }
1383
1384         ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
1385                     get_color(vc, info, c, 0));
1386         vbl_cursor_cnt = CURSOR_DRAW_DELAY;
1387 }
1388
1389 static int scrollback_phys_max = 0;
1390 static int scrollback_max = 0;
1391 static int scrollback_current = 0;
1392
1393 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1394                            int unit)
1395 {
1396         struct display *p, *t;
1397         struct vc_data **default_mode, *vc;
1398         struct vc_data *svc;
1399         struct fbcon_ops *ops = info->fbcon_par;
1400         int rows, cols, charcnt = 256;
1401
1402         p = &fb_display[unit];
1403
1404         if (var_to_display(p, var, info))
1405                 return;
1406
1407         vc = vc_cons[unit].d;
1408
1409         if (!vc)
1410                 return;
1411
1412         default_mode = vc->vc_display_fg;
1413         svc = *default_mode;
1414         t = &fb_display[svc->vc_num];
1415
1416         if (!vc->vc_font.data) {
1417                 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1418                 vc->vc_font.width = (*default_mode)->vc_font.width;
1419                 vc->vc_font.height = (*default_mode)->vc_font.height;
1420                 p->userfont = t->userfont;
1421                 if (p->userfont)
1422                         REFCOUNT(p->fontdata)++;
1423         }
1424         if (p->userfont)
1425                 charcnt = FNTCHARCNT(p->fontdata);
1426
1427         var->activate = FB_ACTIVATE_NOW;
1428         info->var.activate = var->activate;
1429         var->yoffset = info->var.yoffset;
1430         var->xoffset = info->var.xoffset;
1431         fb_set_var(info, var);
1432         ops->var = info->var;
1433         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1434         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1435         if (charcnt == 256) {
1436                 vc->vc_hi_font_mask = 0;
1437         } else {
1438                 vc->vc_hi_font_mask = 0x100;
1439                 if (vc->vc_can_do_color)
1440                         vc->vc_complement_mask <<= 1;
1441         }
1442
1443         if (!*svc->vc_uni_pagedir_loc)
1444                 con_set_default_unimap(svc);
1445         if (!*vc->vc_uni_pagedir_loc)
1446                 con_copy_unimap(vc, svc);
1447
1448         cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1449         rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1450         cols /= vc->vc_font.width;
1451         rows /= vc->vc_font.height;
1452         vc_resize(vc, cols, rows);
1453
1454         if (CON_IS_VISIBLE(vc)) {
1455                 update_screen(vc);
1456                 if (softback_buf)
1457                         fbcon_update_softback(vc);
1458         }
1459 }
1460
1461 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1462 {
1463         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1464         struct fbcon_ops *ops = info->fbcon_par;
1465         struct display *p = &fb_display[vc->vc_num];
1466
1467         p->yscroll += count;
1468         if (p->yscroll >= p->vrows)     /* Deal with wrap */
1469                 p->yscroll -= p->vrows;
1470         ops->var.xoffset = 0;
1471         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1472         ops->var.vmode |= FB_VMODE_YWRAP;
1473         ops->update_start(info);
1474         scrollback_max += count;
1475         if (scrollback_max > scrollback_phys_max)
1476                 scrollback_max = scrollback_phys_max;
1477         scrollback_current = 0;
1478 }
1479
1480 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1481 {
1482         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1483         struct fbcon_ops *ops = info->fbcon_par;
1484         struct display *p = &fb_display[vc->vc_num];
1485
1486         p->yscroll -= count;
1487         if (p->yscroll < 0)     /* Deal with wrap */
1488                 p->yscroll += p->vrows;
1489         ops->var.xoffset = 0;
1490         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1491         ops->var.vmode |= FB_VMODE_YWRAP;
1492         ops->update_start(info);
1493         scrollback_max -= count;
1494         if (scrollback_max < 0)
1495                 scrollback_max = 0;
1496         scrollback_current = 0;
1497 }
1498
1499 static __inline__ void ypan_up(struct vc_data *vc, int count)
1500 {
1501         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1502         struct display *p = &fb_display[vc->vc_num];
1503         struct fbcon_ops *ops = info->fbcon_par;
1504
1505         p->yscroll += count;
1506         if (p->yscroll > p->vrows - vc->vc_rows) {
1507                 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1508                             0, 0, 0, vc->vc_rows, vc->vc_cols);
1509                 p->yscroll -= p->vrows - vc->vc_rows;
1510         }
1511
1512         ops->var.xoffset = 0;
1513         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1514         ops->var.vmode &= ~FB_VMODE_YWRAP;
1515         ops->update_start(info);
1516         fbcon_clear_margins(vc, 1);
1517         scrollback_max += count;
1518         if (scrollback_max > scrollback_phys_max)
1519                 scrollback_max = scrollback_phys_max;
1520         scrollback_current = 0;
1521 }
1522
1523 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1524 {
1525         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1526         struct fbcon_ops *ops = info->fbcon_par;
1527         struct display *p = &fb_display[vc->vc_num];
1528
1529         p->yscroll += count;
1530
1531         if (p->yscroll > p->vrows - vc->vc_rows) {
1532                 p->yscroll -= p->vrows - vc->vc_rows;
1533                 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1534         }
1535
1536         ops->var.xoffset = 0;
1537         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1538         ops->var.vmode &= ~FB_VMODE_YWRAP;
1539         ops->update_start(info);
1540         fbcon_clear_margins(vc, 1);
1541         scrollback_max += count;
1542         if (scrollback_max > scrollback_phys_max)
1543                 scrollback_max = scrollback_phys_max;
1544         scrollback_current = 0;
1545 }
1546
1547 static __inline__ void ypan_down(struct vc_data *vc, int count)
1548 {
1549         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1550         struct display *p = &fb_display[vc->vc_num];
1551         struct fbcon_ops *ops = info->fbcon_par;
1552
1553         p->yscroll -= count;
1554         if (p->yscroll < 0) {
1555                 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1556                             0, vc->vc_rows, vc->vc_cols);
1557                 p->yscroll += p->vrows - vc->vc_rows;
1558         }
1559
1560         ops->var.xoffset = 0;
1561         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1562         ops->var.vmode &= ~FB_VMODE_YWRAP;
1563         ops->update_start(info);
1564         fbcon_clear_margins(vc, 1);
1565         scrollback_max -= count;
1566         if (scrollback_max < 0)
1567                 scrollback_max = 0;
1568         scrollback_current = 0;
1569 }
1570
1571 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1572 {
1573         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1574         struct fbcon_ops *ops = info->fbcon_par;
1575         struct display *p = &fb_display[vc->vc_num];
1576
1577         p->yscroll -= count;
1578
1579         if (p->yscroll < 0) {
1580                 p->yscroll += p->vrows - vc->vc_rows;
1581                 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1582         }
1583
1584         ops->var.xoffset = 0;
1585         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1586         ops->var.vmode &= ~FB_VMODE_YWRAP;
1587         ops->update_start(info);
1588         fbcon_clear_margins(vc, 1);
1589         scrollback_max -= count;
1590         if (scrollback_max < 0)
1591                 scrollback_max = 0;
1592         scrollback_current = 0;
1593 }
1594
1595 static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1596                                   long delta)
1597 {
1598         int count = vc->vc_rows;
1599         unsigned short *d, *s;
1600         unsigned long n;
1601         int line = 0;
1602
1603         d = (u16 *) softback_curr;
1604         if (d == (u16 *) softback_in)
1605                 d = (u16 *) vc->vc_origin;
1606         n = softback_curr + delta * vc->vc_size_row;
1607         softback_lines -= delta;
1608         if (delta < 0) {
1609                 if (softback_curr < softback_top && n < softback_buf) {
1610                         n += softback_end - softback_buf;
1611                         if (n < softback_top) {
1612                                 softback_lines -=
1613                                     (softback_top - n) / vc->vc_size_row;
1614                                 n = softback_top;
1615                         }
1616                 } else if (softback_curr >= softback_top
1617                            && n < softback_top) {
1618                         softback_lines -=
1619                             (softback_top - n) / vc->vc_size_row;
1620                         n = softback_top;
1621                 }
1622         } else {
1623                 if (softback_curr > softback_in && n >= softback_end) {
1624                         n += softback_buf - softback_end;
1625                         if (n > softback_in) {
1626                                 n = softback_in;
1627                                 softback_lines = 0;
1628                         }
1629                 } else if (softback_curr <= softback_in && n > softback_in) {
1630                         n = softback_in;
1631                         softback_lines = 0;
1632                 }
1633         }
1634         if (n == softback_curr)
1635                 return;
1636         softback_curr = n;
1637         s = (u16 *) softback_curr;
1638         if (s == (u16 *) softback_in)
1639                 s = (u16 *) vc->vc_origin;
1640         while (count--) {
1641                 unsigned short *start;
1642                 unsigned short *le;
1643                 unsigned short c;
1644                 int x = 0;
1645                 unsigned short attr = 1;
1646
1647                 start = s;
1648                 le = advance_row(s, 1);
1649                 do {
1650                         c = scr_readw(s);
1651                         if (attr != (c & 0xff00)) {
1652                                 attr = c & 0xff00;
1653                                 if (s > start) {
1654                                         fbcon_putcs(vc, start, s - start,
1655                                                     line, x);
1656                                         x += s - start;
1657                                         start = s;
1658                                 }
1659                         }
1660                         if (c == scr_readw(d)) {
1661                                 if (s > start) {
1662                                         fbcon_putcs(vc, start, s - start,
1663                                                     line, x);
1664                                         x += s - start + 1;
1665                                         start = s + 1;
1666                                 } else {
1667                                         x++;
1668                                         start++;
1669                                 }
1670                         }
1671                         s++;
1672                         d++;
1673                 } while (s < le);
1674                 if (s > start)
1675                         fbcon_putcs(vc, start, s - start, line, x);
1676                 line++;
1677                 if (d == (u16 *) softback_end)
1678                         d = (u16 *) softback_buf;
1679                 if (d == (u16 *) softback_in)
1680                         d = (u16 *) vc->vc_origin;
1681                 if (s == (u16 *) softback_end)
1682                         s = (u16 *) softback_buf;
1683                 if (s == (u16 *) softback_in)
1684                         s = (u16 *) vc->vc_origin;
1685         }
1686 }
1687
1688 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1689                               int line, int count, int dy)
1690 {
1691         unsigned short *s = (unsigned short *)
1692                 (vc->vc_origin + vc->vc_size_row * line);
1693
1694         while (count--) {
1695                 unsigned short *start = s;
1696                 unsigned short *le = advance_row(s, 1);
1697                 unsigned short c;
1698                 int x = 0;
1699                 unsigned short attr = 1;
1700
1701                 do {
1702                         c = scr_readw(s);
1703                         if (attr != (c & 0xff00)) {
1704                                 attr = c & 0xff00;
1705                                 if (s > start) {
1706                                         fbcon_putcs(vc, start, s - start,
1707                                                     dy, x);
1708                                         x += s - start;
1709                                         start = s;
1710                                 }
1711                         }
1712                         console_conditional_schedule();
1713                         s++;
1714                 } while (s < le);
1715                 if (s > start)
1716                         fbcon_putcs(vc, start, s - start, dy, x);
1717                 console_conditional_schedule();
1718                 dy++;
1719         }
1720 }
1721
1722 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
1723                         struct display *p, int line, int count, int ycount)
1724 {
1725         int offset = ycount * vc->vc_cols;
1726         unsigned short *d = (unsigned short *)
1727             (vc->vc_origin + vc->vc_size_row * line);
1728         unsigned short *s = d + offset;
1729         struct fbcon_ops *ops = info->fbcon_par;
1730
1731         while (count--) {
1732                 unsigned short *start = s;
1733                 unsigned short *le = advance_row(s, 1);
1734                 unsigned short c;
1735                 int x = 0;
1736
1737                 do {
1738                         c = scr_readw(s);
1739
1740                         if (c == scr_readw(d)) {
1741                                 if (s > start) {
1742                                         ops->bmove(vc, info, line + ycount, x,
1743                                                    line, x, 1, s-start);
1744                                         x += s - start + 1;
1745                                         start = s + 1;
1746                                 } else {
1747                                         x++;
1748                                         start++;
1749                                 }
1750                         }
1751
1752                         scr_writew(c, d);
1753                         console_conditional_schedule();
1754                         s++;
1755                         d++;
1756                 } while (s < le);
1757                 if (s > start)
1758                         ops->bmove(vc, info, line + ycount, x, line, x, 1,
1759                                    s-start);
1760                 console_conditional_schedule();
1761                 if (ycount > 0)
1762                         line++;
1763                 else {
1764                         line--;
1765                         /* NOTE: We subtract two lines from these pointers */
1766                         s -= vc->vc_size_row;
1767                         d -= vc->vc_size_row;
1768                 }
1769         }
1770 }
1771
1772 static void fbcon_redraw(struct vc_data *vc, struct display *p,
1773                          int line, int count, int offset)
1774 {
1775         unsigned short *d = (unsigned short *)
1776             (vc->vc_origin + vc->vc_size_row * line);
1777         unsigned short *s = d + offset;
1778
1779         while (count--) {
1780                 unsigned short *start = s;
1781                 unsigned short *le = advance_row(s, 1);
1782                 unsigned short c;
1783                 int x = 0;
1784                 unsigned short attr = 1;
1785
1786                 do {
1787                         c = scr_readw(s);
1788                         if (attr != (c & 0xff00)) {
1789                                 attr = c & 0xff00;
1790                                 if (s > start) {
1791                                         fbcon_putcs(vc, start, s - start,
1792                                                     line, x);
1793                                         x += s - start;
1794                                         start = s;
1795                                 }
1796                         }
1797                         if (c == scr_readw(d)) {
1798                                 if (s > start) {
1799                                         fbcon_putcs(vc, start, s - start,
1800                                                      line, x);
1801                                         x += s - start + 1;
1802                                         start = s + 1;
1803                                 } else {
1804                                         x++;
1805                                         start++;
1806                                 }
1807                         }
1808                         scr_writew(c, d);
1809                         console_conditional_schedule();
1810                         s++;
1811                         d++;
1812                 } while (s < le);
1813                 if (s > start)
1814                         fbcon_putcs(vc, start, s - start, line, x);
1815                 console_conditional_schedule();
1816                 if (offset > 0)
1817                         line++;
1818                 else {
1819                         line--;
1820                         /* NOTE: We subtract two lines from these pointers */
1821                         s -= vc->vc_size_row;
1822                         d -= vc->vc_size_row;
1823                 }
1824         }
1825 }
1826
1827 static inline void fbcon_softback_note(struct vc_data *vc, int t,
1828                                        int count)
1829 {
1830         unsigned short *p;
1831
1832         if (vc->vc_num != fg_console)
1833                 return;
1834         p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1835
1836         while (count) {
1837                 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1838                 count--;
1839                 p = advance_row(p, 1);
1840                 softback_in += vc->vc_size_row;
1841                 if (softback_in == softback_end)
1842                         softback_in = softback_buf;
1843                 if (softback_in == softback_top) {
1844                         softback_top += vc->vc_size_row;
1845                         if (softback_top == softback_end)
1846                                 softback_top = softback_buf;
1847                 }
1848         }
1849         softback_curr = softback_in;
1850 }
1851
1852 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
1853                         int count)
1854 {
1855         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1856         struct display *p = &fb_display[vc->vc_num];
1857         int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1858
1859         if (fbcon_is_inactive(vc, info))
1860                 return -EINVAL;
1861
1862         fbcon_cursor(vc, CM_ERASE);
1863
1864         /*
1865          * ++Geert: Only use ywrap/ypan if the console is in text mode
1866          * ++Andrew: Only use ypan on hardware text mode when scrolling the
1867          *           whole screen (prevents flicker).
1868          */
1869
1870         switch (dir) {
1871         case SM_UP:
1872                 if (count > vc->vc_rows)        /* Maximum realistic size */
1873                         count = vc->vc_rows;
1874                 if (softback_top)
1875                         fbcon_softback_note(vc, t, count);
1876                 if (logo_shown >= 0)
1877                         goto redraw_up;
1878                 switch (p->scrollmode) {
1879                 case SCROLL_MOVE:
1880                         fbcon_redraw_blit(vc, info, p, t, b - t - count,
1881                                      count);
1882                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1883                         scr_memsetw((unsigned short *) (vc->vc_origin +
1884                                                         vc->vc_size_row *
1885                                                         (b - count)),
1886                                     vc->vc_video_erase_char,
1887                                     vc->vc_size_row * count);
1888                         return 1;
1889                         break;
1890
1891                 case SCROLL_WRAP_MOVE:
1892                         if (b - t - count > 3 * vc->vc_rows >> 2) {
1893                                 if (t > 0)
1894                                         fbcon_bmove(vc, 0, 0, count, 0, t,
1895                                                     vc->vc_cols);
1896                                 ywrap_up(vc, count);
1897                                 if (vc->vc_rows - b > 0)
1898                                         fbcon_bmove(vc, b - count, 0, b, 0,
1899                                                     vc->vc_rows - b,
1900                                                     vc->vc_cols);
1901                         } else if (info->flags & FBINFO_READS_FAST)
1902                                 fbcon_bmove(vc, t + count, 0, t, 0,
1903                                             b - t - count, vc->vc_cols);
1904                         else
1905                                 goto redraw_up;
1906                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1907                         break;
1908
1909                 case SCROLL_PAN_REDRAW:
1910                         if ((p->yscroll + count <=
1911                              2 * (p->vrows - vc->vc_rows))
1912                             && ((!scroll_partial && (b - t == vc->vc_rows))
1913                                 || (scroll_partial
1914                                     && (b - t - count >
1915                                         3 * vc->vc_rows >> 2)))) {
1916                                 if (t > 0)
1917                                         fbcon_redraw_move(vc, p, 0, t, count);
1918                                 ypan_up_redraw(vc, t, count);
1919                                 if (vc->vc_rows - b > 0)
1920                                         fbcon_redraw_move(vc, p, b,
1921                                                           vc->vc_rows - b, b);
1922                         } else
1923                                 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1924                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1925                         break;
1926
1927                 case SCROLL_PAN_MOVE:
1928                         if ((p->yscroll + count <=
1929                              2 * (p->vrows - vc->vc_rows))
1930                             && ((!scroll_partial && (b - t == vc->vc_rows))
1931                                 || (scroll_partial
1932                                     && (b - t - count >
1933                                         3 * vc->vc_rows >> 2)))) {
1934                                 if (t > 0)
1935                                         fbcon_bmove(vc, 0, 0, count, 0, t,
1936                                                     vc->vc_cols);
1937                                 ypan_up(vc, count);
1938                                 if (vc->vc_rows - b > 0)
1939                                         fbcon_bmove(vc, b - count, 0, b, 0,
1940                                                     vc->vc_rows - b,
1941                                                     vc->vc_cols);
1942                         } else if (info->flags & FBINFO_READS_FAST)
1943                                 fbcon_bmove(vc, t + count, 0, t, 0,
1944                                             b - t - count, vc->vc_cols);
1945                         else
1946                                 goto redraw_up;
1947                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1948                         break;
1949
1950                 case SCROLL_REDRAW:
1951                       redraw_up:
1952                         fbcon_redraw(vc, p, t, b - t - count,
1953                                      count * vc->vc_cols);
1954                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1955                         scr_memsetw((unsigned short *) (vc->vc_origin +
1956                                                         vc->vc_size_row *
1957                                                         (b - count)),
1958                                     vc->vc_video_erase_char,
1959                                     vc->vc_size_row * count);
1960                         return 1;
1961                 }
1962                 break;
1963
1964         case SM_DOWN:
1965                 if (count > vc->vc_rows)        /* Maximum realistic size */
1966                         count = vc->vc_rows;
1967                 if (logo_shown >= 0)
1968                         goto redraw_down;
1969                 switch (p->scrollmode) {
1970                 case SCROLL_MOVE:
1971                         fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,
1972                                      -count);
1973                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1974                         scr_memsetw((unsigned short *) (vc->vc_origin +
1975                                                         vc->vc_size_row *
1976                                                         t),
1977                                     vc->vc_video_erase_char,
1978                                     vc->vc_size_row * count);
1979                         return 1;
1980                         break;
1981
1982                 case SCROLL_WRAP_MOVE:
1983                         if (b - t - count > 3 * vc->vc_rows >> 2) {
1984                                 if (vc->vc_rows - b > 0)
1985                                         fbcon_bmove(vc, b, 0, b - count, 0,
1986                                                     vc->vc_rows - b,
1987                                                     vc->vc_cols);
1988                                 ywrap_down(vc, count);
1989                                 if (t > 0)
1990                                         fbcon_bmove(vc, count, 0, 0, 0, t,
1991                                                     vc->vc_cols);
1992                         } else if (info->flags & FBINFO_READS_FAST)
1993                                 fbcon_bmove(vc, t, 0, t + count, 0,
1994                                             b - t - count, vc->vc_cols);
1995                         else
1996                                 goto redraw_down;
1997                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1998                         break;
1999
2000                 case SCROLL_PAN_MOVE:
2001                         if ((count - p->yscroll <= p->vrows - vc->vc_rows)
2002                             && ((!scroll_partial && (b - t == vc->vc_rows))
2003                                 || (scroll_partial
2004                                     && (b - t - count >
2005                                         3 * vc->vc_rows >> 2)))) {
2006                                 if (vc->vc_rows - b > 0)
2007                                         fbcon_bmove(vc, b, 0, b - count, 0,
2008                                                     vc->vc_rows - b,
2009                                                     vc->vc_cols);
2010                                 ypan_down(vc, count);
2011                                 if (t > 0)
2012                                         fbcon_bmove(vc, count, 0, 0, 0, t,
2013                                                     vc->vc_cols);
2014                         } else if (info->flags & FBINFO_READS_FAST)
2015                                 fbcon_bmove(vc, t, 0, t + count, 0,
2016                                             b - t - count, vc->vc_cols);
2017                         else
2018                                 goto redraw_down;
2019                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
2020                         break;
2021
2022                 case SCROLL_PAN_REDRAW:
2023                         if ((count - p->yscroll <= p->vrows - vc->vc_rows)
2024                             && ((!scroll_partial && (b - t == vc->vc_rows))
2025                                 || (scroll_partial
2026                                     && (b - t - count >
2027                                         3 * vc->vc_rows >> 2)))) {
2028                                 if (vc->vc_rows - b > 0)
2029                                         fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
2030                                                           b - count);
2031                                 ypan_down_redraw(vc, t, count);
2032                                 if (t > 0)
2033                                         fbcon_redraw_move(vc, p, count, t, 0);
2034                         } else
2035                                 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
2036                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
2037                         break;
2038
2039                 case SCROLL_REDRAW:
2040                       redraw_down:
2041                         fbcon_redraw(vc, p, b - 1, b - t - count,
2042                                      -count * vc->vc_cols);
2043                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
2044                         scr_memsetw((unsigned short *) (vc->vc_origin +
2045                                                         vc->vc_size_row *
2046                                                         t),
2047                                     vc->vc_video_erase_char,
2048                                     vc->vc_size_row * count);
2049                         return 1;
2050                 }
2051         }
2052         return 0;
2053 }
2054
2055
2056 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
2057                         int height, int width)
2058 {
2059         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2060         struct display *p = &fb_display[vc->vc_num];
2061
2062         if (fbcon_is_inactive(vc, info))
2063                 return;
2064
2065         if (!width || !height)
2066                 return;
2067
2068         /*  Split blits that cross physical y_wrap case.
2069          *  Pathological case involves 4 blits, better to use recursive
2070          *  code rather than unrolled case
2071          *
2072          *  Recursive invocations don't need to erase the cursor over and
2073          *  over again, so we use fbcon_bmove_rec()
2074          */
2075         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
2076                         p->vrows - p->yscroll);
2077 }
2078
2079 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
2080                             int dy, int dx, int height, int width, u_int y_break)
2081 {
2082         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2083         struct fbcon_ops *ops = info->fbcon_par;
2084         u_int b;
2085
2086         if (sy < y_break && sy + height > y_break) {
2087                 b = y_break - sy;
2088                 if (dy < sy) {  /* Avoid trashing self */
2089                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2090                                         y_break);
2091                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2092                                         height - b, width, y_break);
2093                 } else {
2094                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2095                                         height - b, width, y_break);
2096                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2097                                         y_break);
2098                 }
2099                 return;
2100         }
2101
2102         if (dy < y_break && dy + height > y_break) {
2103                 b = y_break - dy;
2104                 if (dy < sy) {  /* Avoid trashing self */
2105                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2106                                         y_break);
2107                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2108                                         height - b, width, y_break);
2109                 } else {
2110                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2111                                         height - b, width, y_break);
2112                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2113                                         y_break);
2114                 }
2115                 return;
2116         }
2117         ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
2118                    height, width);
2119 }
2120
2121 static __inline__ void updatescrollmode(struct display *p,
2122                                         struct fb_info *info,
2123                                         struct vc_data *vc)
2124 {
2125         struct fbcon_ops *ops = info->fbcon_par;
2126         int fh = vc->vc_font.height;
2127         int cap = info->flags;
2128         u16 t = 0;
2129         int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
2130                                   info->fix.xpanstep);
2131         int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
2132         int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2133         int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
2134                                    info->var.xres_virtual);
2135         int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
2136                 divides(ypan, vc->vc_font.height) && vyres > yres;
2137         int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
2138                 divides(ywrap, vc->vc_font.height) &&
2139                 divides(vc->vc_font.height, vyres) &&
2140                 divides(vc->vc_font.height, yres);
2141         int reading_fast = cap & FBINFO_READS_FAST;
2142         int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
2143                 !(cap & FBINFO_HWACCEL_DISABLED);
2144         int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
2145                 !(cap & FBINFO_HWACCEL_DISABLED);
2146
2147         p->vrows = vyres/fh;
2148         if (yres > (fh * (vc->vc_rows + 1)))
2149                 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2150         if ((yres % fh) && (vyres % fh < yres % fh))
2151                 p->vrows--;
2152
2153         if (good_wrap || good_pan) {
2154                 if (reading_fast || fast_copyarea)
2155                         p->scrollmode = good_wrap ?
2156                                 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
2157                 else
2158                         p->scrollmode = good_wrap ? SCROLL_REDRAW :
2159                                 SCROLL_PAN_REDRAW;
2160         } else {
2161                 if (reading_fast || (fast_copyarea && !fast_imageblit))
2162                         p->scrollmode = SCROLL_MOVE;
2163                 else
2164                         p->scrollmode = SCROLL_REDRAW;
2165         }
2166 }
2167
2168 static int fbcon_resize(struct vc_data *vc, unsigned int width,
2169                         unsigned int height, unsigned int user)
2170 {
2171         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2172         struct fbcon_ops *ops = info->fbcon_par;
2173         struct display *p = &fb_display[vc->vc_num];
2174         struct fb_var_screeninfo var = info->var;
2175         int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2176
2177         virt_w = FBCON_SWAP(ops->rotate, width, height);
2178         virt_h = FBCON_SWAP(ops->rotate, height, width);
2179         virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2180                                  vc->vc_font.height);
2181         virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2182                                  vc->vc_font.width);
2183         var.xres = virt_w * virt_fw;
2184         var.yres = virt_h * virt_fh;
2185         x_diff = info->var.xres - var.xres;
2186         y_diff = info->var.yres - var.yres;
2187         if (x_diff < 0 || x_diff > virt_fw ||
2188             y_diff < 0 || y_diff > virt_fh) {
2189                 const struct fb_videomode *mode;
2190
2191                 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2192                 mode = fb_find_best_mode(&var, &info->modelist);
2193                 if (mode == NULL)
2194                         return -EINVAL;
2195                 display_to_var(&var, p);
2196                 fb_videomode_to_var(&var, mode);
2197
2198                 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2199                         return -EINVAL;
2200
2201                 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2202                 if (CON_IS_VISIBLE(vc)) {
2203                         var.activate = FB_ACTIVATE_NOW |
2204                                 FB_ACTIVATE_FORCE;
2205                         fb_set_var(info, &var);
2206                 }
2207                 var_to_display(p, &info->var, info);
2208                 ops->var = info->var;
2209         }
2210         updatescrollmode(p, info, vc);
2211         return 0;
2212 }
2213
2214 static int fbcon_switch(struct vc_data *vc)
2215 {
2216         struct fb_info *info, *old_info = NULL;
2217         struct fbcon_ops *ops;
2218         struct display *p = &fb_display[vc->vc_num];
2219         struct fb_var_screeninfo var;
2220         int i, prev_console, charcnt = 256;
2221
2222         info = registered_fb[con2fb_map[vc->vc_num]];
2223         ops = info->fbcon_par;
2224
2225         if (softback_top) {
2226                 if (softback_lines)
2227                         fbcon_set_origin(vc);
2228                 softback_top = softback_curr = softback_in = softback_buf;
2229                 softback_lines = 0;
2230                 fbcon_update_softback(vc);
2231         }
2232
2233         if (logo_shown >= 0) {
2234                 struct vc_data *conp2 = vc_cons[logo_shown].d;
2235
2236                 if (conp2->vc_top == logo_lines
2237                     && conp2->vc_bottom == conp2->vc_rows)
2238                         conp2->vc_top = 0;
2239                 logo_shown = FBCON_LOGO_CANSHOW;
2240         }
2241
2242         prev_console = ops->currcon;
2243         if (prev_console != -1)
2244                 old_info = registered_fb[con2fb_map[prev_console]];
2245         /*
2246          * FIXME: If we have multiple fbdev's loaded, we need to
2247          * update all info->currcon.  Perhaps, we can place this
2248          * in a centralized structure, but this might break some
2249          * drivers.
2250          *
2251          * info->currcon = vc->vc_num;
2252          */
2253         for (i = 0; i < FB_MAX; i++) {
2254                 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
2255                         struct fbcon_ops *o = registered_fb[i]->fbcon_par;
2256
2257                         o->currcon = vc->vc_num;
2258                 }
2259         }
2260         memset(&var, 0, sizeof(struct fb_var_screeninfo));
2261         display_to_var(&var, p);
2262         var.activate = FB_ACTIVATE_NOW;
2263
2264         /*
2265          * make sure we don't unnecessarily trip the memcmp()
2266          * in fb_set_var()
2267          */
2268         info->var.activate = var.activate;
2269         var.vmode |= info->var.vmode & ~FB_VMODE_MASK;
2270         fb_set_var(info, &var);
2271         ops->var = info->var;
2272
2273         if (old_info != NULL && (old_info != info ||
2274                                  info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2275                 if (info->fbops->fb_set_par)
2276                         info->fbops->fb_set_par(info);
2277
2278                 if (old_info != info)
2279                         fbcon_del_cursor_timer(old_info);
2280         }
2281
2282         if (fbcon_is_inactive(vc, info) ||
2283             ops->blank_state != FB_BLANK_UNBLANK)
2284                 fbcon_del_cursor_timer(info);
2285         else
2286                 fbcon_add_cursor_timer(info);
2287
2288         set_blitting_type(vc, info);
2289         ops->cursor_reset = 1;
2290
2291         if (ops->rotate_font && ops->rotate_font(info, vc)) {
2292                 ops->rotate = FB_ROTATE_UR;
2293                 set_blitting_type(vc, info);
2294         }
2295
2296         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2297         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2298
2299         if (p->userfont)
2300                 charcnt = FNTCHARCNT(vc->vc_font.data);
2301
2302         if (charcnt > 256)
2303                 vc->vc_complement_mask <<= 1;
2304
2305         updatescrollmode(p, info, vc);
2306
2307         switch (p->scrollmode) {
2308         case SCROLL_WRAP_MOVE:
2309                 scrollback_phys_max = p->vrows - vc->vc_rows;
2310                 break;
2311         case SCROLL_PAN_MOVE:
2312         case SCROLL_PAN_REDRAW:
2313                 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2314                 if (scrollback_phys_max < 0)
2315                         scrollback_phys_max = 0;
2316                 break;
2317         default:
2318                 scrollback_phys_max = 0;
2319                 break;
2320         }
2321
2322         scrollback_max = 0;
2323         scrollback_current = 0;
2324
2325         if (!fbcon_is_inactive(vc, info)) {
2326             ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2327             ops->update_start(info);
2328         }
2329
2330         fbcon_set_palette(vc, color_table);
2331         fbcon_clear_margins(vc, 0);
2332
2333         if (logo_shown == FBCON_LOGO_DRAW) {
2334
2335                 logo_shown = fg_console;
2336                 /* This is protected above by initmem_freed */
2337                 fb_show_logo(info, ops->rotate);
2338                 update_region(vc,
2339                               vc->vc_origin + vc->vc_size_row * vc->vc_top,
2340                               vc->vc_size_row * (vc->vc_bottom -
2341                                                  vc->vc_top) / 2);
2342                 return 0;
2343         }
2344         return 1;
2345 }
2346
2347 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2348                                 int blank)
2349 {
2350         struct fb_event event;
2351
2352         if (blank) {
2353                 unsigned short charmask = vc->vc_hi_font_mask ?
2354                         0x1ff : 0xff;
2355                 unsigned short oldc;
2356
2357                 oldc = vc->vc_video_erase_char;
2358                 vc->vc_video_erase_char &= charmask;
2359                 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2360                 vc->vc_video_erase_char = oldc;
2361         }
2362
2363
2364         event.info = info;
2365         event.data = &blank;
2366         fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
2367 }
2368
2369 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2370 {
2371         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2372         struct fbcon_ops *ops = info->fbcon_par;
2373
2374         if (mode_switch) {
2375                 struct fb_var_screeninfo var = info->var;
2376
2377                 ops->graphics = 1;
2378
2379                 if (!blank) {
2380                         if (info->fbops->fb_save_state)
2381                                 info->fbops->fb_save_state(info);
2382                         var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2383                         fb_set_var(info, &var);
2384                         ops->graphics = 0;
2385                         ops->var = info->var;
2386                 } else if (info->fbops->fb_restore_state)
2387                         info->fbops->fb_restore_state(info);
2388         }
2389
2390         if (!fbcon_is_inactive(vc, info)) {
2391                 if (ops->blank_state != blank) {
2392                         int ret = 1;
2393
2394                         ops->blank_state = blank;
2395                         fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2396                         ops->cursor_flash = (!blank);
2397
2398                         if (info->fbops->fb_blank)
2399                                 ret = info->fbops->fb_blank(blank, info);
2400                         if (ret)
2401                                 fbcon_generic_blank(vc, info, blank);
2402                 }
2403
2404                 if (!blank)
2405                         update_screen(vc);
2406         }
2407
2408         if (mode_switch || fbcon_is_inactive(vc, info) ||
2409             ops->blank_state != FB_BLANK_UNBLANK)
2410                 fbcon_del_cursor_timer(info);
2411         else
2412                 fbcon_add_cursor_timer(info);
2413
2414         return 0;
2415 }
2416
2417 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2418 {
2419         u8 *fontdata = vc->vc_font.data;
2420         u8 *data = font->data;
2421         int i, j;
2422
2423         font->width = vc->vc_font.width;
2424         font->height = vc->vc_font.height;
2425         font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2426         if (!font->data)
2427                 return 0;
2428
2429         if (font->width <= 8) {
2430                 j = vc->vc_font.height;
2431                 for (i = 0; i < font->charcount; i++) {
2432                         memcpy(data, fontdata, j);
2433                         memset(data + j, 0, 32 - j);
2434                         data += 32;
2435                         fontdata += j;
2436                 }
2437         } else if (font->width <= 16) {
2438                 j = vc->vc_font.height * 2;
2439                 for (i = 0; i < font->charcount; i++) {
2440                         memcpy(data, fontdata, j);
2441                         memset(data + j, 0, 64 - j);
2442                         data += 64;
2443                         fontdata += j;
2444                 }
2445         } else if (font->width <= 24) {
2446                 for (i = 0; i < font->charcount; i++) {
2447                         for (j = 0; j < vc->vc_font.height; j++) {
2448                                 *data++ = fontdata[0];
2449                                 *data++ = fontdata[1];
2450                                 *data++ = fontdata[2];
2451                                 fontdata += sizeof(u32);
2452                         }
2453                         memset(data, 0, 3 * (32 - j));
2454                         data += 3 * (32 - j);
2455                 }
2456         } else {
2457                 j = vc->vc_font.height * 4;
2458                 for (i = 0; i < font->charcount; i++) {
2459                         memcpy(data, fontdata, j);
2460                         memset(data + j, 0, 128 - j);
2461                         data += 128;
2462                         fontdata += j;
2463                 }
2464         }
2465         return 0;
2466 }
2467
2468 static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2469                              const u8 * data, int userfont)
2470 {
2471         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2472         struct fbcon_ops *ops = info->fbcon_par;
2473         struct display *p = &fb_display[vc->vc_num];
2474         int resize;
2475         int cnt;
2476         char *old_data = NULL;
2477
2478         if (CON_IS_VISIBLE(vc) && softback_lines)
2479                 fbcon_set_origin(vc);
2480
2481         resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2482         if (p->userfont)
2483                 old_data = vc->vc_font.data;
2484         if (userfont)
2485                 cnt = FNTCHARCNT(data);
2486         else
2487                 cnt = 256;
2488         vc->vc_font.data = (void *)(p->fontdata = data);
2489         if ((p->userfont = userfont))
2490                 REFCOUNT(data)++;
2491         vc->vc_font.width = w;
2492         vc->vc_font.height = h;
2493         if (vc->vc_hi_font_mask && cnt == 256) {
2494                 vc->vc_hi_font_mask = 0;
2495                 if (vc->vc_can_do_color) {
2496                         vc->vc_complement_mask >>= 1;
2497                         vc->vc_s_complement_mask >>= 1;
2498                 }
2499
2500                 /* ++Edmund: reorder the attribute bits */
2501                 if (vc->vc_can_do_color) {
2502                         unsigned short *cp =
2503                             (unsigned short *) vc->vc_origin;
2504                         int count = vc->vc_screenbuf_size / 2;
2505                         unsigned short c;
2506                         for (; count > 0; count--, cp++) {
2507                                 c = scr_readw(cp);
2508                                 scr_writew(((c & 0xfe00) >> 1) |
2509                                            (c & 0xff), cp);
2510                         }
2511                         c = vc->vc_video_erase_char;
2512                         vc->vc_video_erase_char =
2513                             ((c & 0xfe00) >> 1) | (c & 0xff);
2514                         vc->vc_attr >>= 1;
2515                 }
2516         } else if (!vc->vc_hi_font_mask && cnt == 512) {
2517                 vc->vc_hi_font_mask = 0x100;
2518                 if (vc->vc_can_do_color) {
2519                         vc->vc_complement_mask <<= 1;
2520                         vc->vc_s_complement_mask <<= 1;
2521                 }
2522
2523                 /* ++Edmund: reorder the attribute bits */
2524                 {
2525                         unsigned short *cp =
2526                             (unsigned short *) vc->vc_origin;
2527                         int count = vc->vc_screenbuf_size / 2;
2528                         unsigned short c;
2529                         for (; count > 0; count--, cp++) {
2530                                 unsigned short newc;
2531                                 c = scr_readw(cp);
2532                                 if (vc->vc_can_do_color)
2533                                         newc =
2534                                             ((c & 0xff00) << 1) | (c &
2535                                                                    0xff);
2536                                 else
2537                                         newc = c & ~0x100;
2538                                 scr_writew(newc, cp);
2539                         }
2540                         c = vc->vc_video_erase_char;
2541                         if (vc->vc_can_do_color) {
2542                                 vc->vc_video_erase_char =
2543                                     ((c & 0xff00) << 1) | (c & 0xff);
2544                                 vc->vc_attr <<= 1;
2545                         } else
2546                                 vc->vc_video_erase_char = c & ~0x100;
2547                 }
2548
2549         }
2550
2551         if (resize) {
2552                 int cols, rows;
2553
2554                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2555                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2556                 cols /= w;
2557                 rows /= h;
2558                 vc_resize(vc, cols, rows);
2559                 if (CON_IS_VISIBLE(vc) && softback_buf)
2560                         fbcon_update_softback(vc);
2561         } else if (CON_IS_VISIBLE(vc)
2562                    && vc->vc_mode == KD_TEXT) {
2563                 fbcon_clear_margins(vc, 0);
2564                 update_screen(vc);
2565         }
2566
2567         if (old_data && (--REFCOUNT(old_data) == 0))
2568                 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2569         return 0;
2570 }
2571
2572 static int fbcon_copy_font(struct vc_data *vc, int con)
2573 {
2574         struct display *od = &fb_display[con];
2575         struct console_font *f = &vc->vc_font;
2576
2577         if (od->fontdata == f->data)
2578                 return 0;       /* already the same font... */
2579         return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2580 }
2581
2582 /*
2583  *  User asked to set font; we are guaranteed that
2584  *      a) width and height are in range 1..32
2585  *      b) charcount does not exceed 512
2586  *  but lets not assume that, since someone might someday want to use larger
2587  *  fonts. And charcount of 512 is small for unicode support.
2588  *
2589  *  However, user space gives the font in 32 rows , regardless of
2590  *  actual font height. So a new API is needed if support for larger fonts
2591  *  is ever implemented.
2592  */
2593
2594 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2595 {
2596         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2597         unsigned charcount = font->charcount;
2598         int w = font->width;
2599         int h = font->height;
2600         int size;
2601         int i, csum;
2602         u8 *new_data, *data = font->data;
2603         int pitch = (font->width+7) >> 3;
2604
2605         /* Is there a reason why fbconsole couldn't handle any charcount >256?
2606          * If not this check should be changed to charcount < 256 */
2607         if (charcount != 256 && charcount != 512)
2608                 return -EINVAL;
2609
2610         /* Make sure drawing engine can handle the font */
2611         if (!(info->pixmap.blit_x & (1 << (font->width - 1))) ||
2612             !(info->pixmap.blit_y & (1 << (font->height - 1))))
2613                 return -EINVAL;
2614
2615         /* Make sure driver can handle the font length */
2616         if (fbcon_invalid_charcount(info, charcount))
2617                 return -EINVAL;
2618
2619         size = h * pitch * charcount;
2620
2621         new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2622
2623         if (!new_data)
2624                 return -ENOMEM;
2625
2626         new_data += FONT_EXTRA_WORDS * sizeof(int);
2627         FNTSIZE(new_data) = size;
2628         FNTCHARCNT(new_data) = charcount;
2629         REFCOUNT(new_data) = 0; /* usage counter */
2630         for (i=0; i< charcount; i++) {
2631                 memcpy(new_data + i*h*pitch, data +  i*32*pitch, h*pitch);
2632         }
2633
2634         /* Since linux has a nice crc32 function use it for counting font
2635          * checksums. */
2636         csum = crc32(0, new_data, size);
2637
2638         FNTSUM(new_data) = csum;
2639         /* Check if the same font is on some other console already */
2640         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2641                 struct vc_data *tmp = vc_cons[i].d;
2642
2643                 if (fb_display[i].userfont &&
2644                     fb_display[i].fontdata &&
2645                     FNTSUM(fb_display[i].fontdata) == csum &&
2646                     FNTSIZE(fb_display[i].fontdata) == size &&
2647                     tmp->vc_font.width == w &&
2648                     !memcmp(fb_display[i].fontdata, new_data, size)) {
2649                         kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2650                         new_data = (u8 *)fb_display[i].fontdata;
2651                         break;
2652                 }
2653         }
2654         return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2655 }
2656
2657 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2658 {
2659         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2660         const struct font_desc *f;
2661
2662         if (!name)
2663                 f = get_default_font(info->var.xres, info->var.yres,
2664                                      info->pixmap.blit_x, info->pixmap.blit_y);
2665         else if (!(f = find_font(name)))
2666                 return -ENOENT;
2667
2668         font->width = f->width;
2669         font->height = f->height;
2670         return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2671 }
2672
2673 static u16 palette_red[16];
2674 static u16 palette_green[16];
2675 static u16 palette_blue[16];
2676
2677 static struct fb_cmap palette_cmap = {
2678         0, 16, palette_red, palette_green, palette_blue, NULL
2679 };
2680
2681 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
2682 {
2683         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2684         int i, j, k, depth;
2685         u8 val;
2686
2687         if (fbcon_is_inactive(vc, info))
2688                 return -EINVAL;
2689
2690         if (!CON_IS_VISIBLE(vc))
2691                 return 0;
2692
2693         depth = fb_get_color_depth(&info->var, &info->fix);
2694         if (depth > 3) {
2695                 for (i = j = 0; i < 16; i++) {
2696                         k = table[i];
2697                         val = vc->vc_palette[j++];
2698                         palette_red[k] = (val << 8) | val;
2699                         val = vc->vc_palette[j++];
2700                         palette_green[k] = (val << 8) | val;
2701                         val = vc->vc_palette[j++];
2702                         palette_blue[k] = (val << 8) | val;
2703                 }
2704                 palette_cmap.len = 16;
2705                 palette_cmap.start = 0;
2706         /*
2707          * If framebuffer is capable of less than 16 colors,
2708          * use default palette of fbcon.
2709          */
2710         } else
2711                 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2712
2713         return fb_set_cmap(&palette_cmap, info);
2714 }
2715
2716 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2717 {
2718         unsigned long p;
2719         int line;
2720
2721         if (vc->vc_num != fg_console || !softback_lines)
2722                 return (u16 *) (vc->vc_origin + offset);
2723         line = offset / vc->vc_size_row;
2724         if (line >= softback_lines)
2725                 return (u16 *) (vc->vc_origin + offset -
2726                                 softback_lines * vc->vc_size_row);
2727         p = softback_curr + offset;
2728         if (p >= softback_end)
2729                 p += softback_buf - softback_end;
2730         return (u16 *) p;
2731 }
2732
2733 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2734                                  int *px, int *py)
2735 {
2736         unsigned long ret;
2737         int x, y;
2738
2739         if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2740                 unsigned long offset = (pos - vc->vc_origin) / 2;
2741
2742                 x = offset % vc->vc_cols;
2743                 y = offset / vc->vc_cols;
2744                 if (vc->vc_num == fg_console)
2745                         y += softback_lines;
2746                 ret = pos + (vc->vc_cols - x) * 2;
2747         } else if (vc->vc_num == fg_console && softback_lines) {
2748                 unsigned long offset = pos - softback_curr;
2749
2750                 if (pos < softback_curr)
2751                         offset += softback_end - softback_buf;
2752                 offset /= 2;
2753                 x = offset % vc->vc_cols;
2754                 y = offset / vc->vc_cols;
2755                 ret = pos + (vc->vc_cols - x) * 2;
2756                 if (ret == softback_end)
2757                         ret = softback_buf;
2758                 if (ret == softback_in)
2759                         ret = vc->vc_origin;
2760         } else {
2761                 /* Should not happen */
2762                 x = y = 0;
2763                 ret = vc->vc_origin;
2764         }
2765         if (px)
2766                 *px = x;
2767         if (py)
2768                 *py = y;
2769         return ret;
2770 }
2771
2772 /* As we might be inside of softback, we may work with non-contiguous buffer,
2773    that's why we have to use a separate routine. */
2774 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2775 {
2776         while (cnt--) {
2777                 u16 a = scr_readw(p);
2778                 if (!vc->vc_can_do_color)
2779                         a ^= 0x0800;
2780                 else if (vc->vc_hi_font_mask == 0x100)
2781                         a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2782                             (((a) & 0x0e00) << 4);
2783                 else
2784                         a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2785                             (((a) & 0x0700) << 4);
2786                 scr_writew(a, p++);
2787                 if (p == (u16 *) softback_end)
2788                         p = (u16 *) softback_buf;
2789                 if (p == (u16 *) softback_in)
2790                         p = (u16 *) vc->vc_origin;
2791         }
2792 }
2793
2794 static int fbcon_scrolldelta(struct vc_data *vc, int lines)
2795 {
2796         struct fb_info *info = registered_fb[con2fb_map[fg_console]];
2797         struct fbcon_ops *ops = info->fbcon_par;
2798         struct display *disp = &fb_display[fg_console];
2799         int offset, limit, scrollback_old;
2800
2801         if (softback_top) {
2802                 if (vc->vc_num != fg_console)
2803                         return 0;
2804                 if (vc->vc_mode != KD_TEXT || !lines)
2805                         return 0;
2806                 if (logo_shown >= 0) {
2807                         struct vc_data *conp2 = vc_cons[logo_shown].d;
2808
2809                         if (conp2->vc_top == logo_lines
2810                             && conp2->vc_bottom == conp2->vc_rows)
2811                                 conp2->vc_top = 0;
2812                         if (logo_shown == vc->vc_num) {
2813                                 unsigned long p, q;
2814                                 int i;
2815
2816                                 p = softback_in;
2817                                 q = vc->vc_origin +
2818                                     logo_lines * vc->vc_size_row;
2819                                 for (i = 0; i < logo_lines; i++) {
2820                                         if (p == softback_top)
2821                                                 break;
2822                                         if (p == softback_buf)
2823                                                 p = softback_end;
2824                                         p -= vc->vc_size_row;
2825                                         q -= vc->vc_size_row;
2826                                         scr_memcpyw((u16 *) q, (u16 *) p,
2827                                                     vc->vc_size_row);
2828                                 }
2829                                 softback_in = softback_curr = p;
2830                                 update_region(vc, vc->vc_origin,
2831                                               logo_lines * vc->vc_cols);
2832                         }
2833                         logo_shown = FBCON_LOGO_CANSHOW;
2834                 }
2835                 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2836                 fbcon_redraw_softback(vc, disp, lines);
2837                 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2838                 return 0;
2839         }
2840
2841         if (!scrollback_phys_max)
2842                 return -ENOSYS;
2843
2844         scrollback_old = scrollback_current;
2845         scrollback_current -= lines;
2846         if (scrollback_current < 0)
2847                 scrollback_current = 0;
2848         else if (scrollback_current > scrollback_max)
2849                 scrollback_current = scrollback_max;
2850         if (scrollback_current == scrollback_old)
2851                 return 0;
2852
2853         if (fbcon_is_inactive(vc, info))
2854                 return 0;
2855
2856         fbcon_cursor(vc, CM_ERASE);
2857
2858         offset = disp->yscroll - scrollback_current;
2859         limit = disp->vrows;
2860         switch (disp->scrollmode) {
2861         case SCROLL_WRAP_MOVE:
2862                 info->var.vmode |= FB_VMODE_YWRAP;
2863                 break;
2864         case SCROLL_PAN_MOVE:
2865         case SCROLL_PAN_REDRAW:
2866                 limit -= vc->vc_rows;
2867                 info->var.vmode &= ~FB_VMODE_YWRAP;
2868                 break;
2869         }
2870         if (offset < 0)
2871                 offset += limit;
2872         else if (offset >= limit)
2873                 offset -= limit;
2874
2875         ops->var.xoffset = 0;
2876         ops->var.yoffset = offset * vc->vc_font.height;
2877         ops->update_start(info);
2878
2879         if (!scrollback_current)
2880                 fbcon_cursor(vc, CM_DRAW);
2881         return 0;
2882 }
2883
2884 static int fbcon_set_origin(struct vc_data *vc)
2885 {
2886         if (softback_lines)
2887                 fbcon_scrolldelta(vc, softback_lines);
2888         return 0;
2889 }
2890
2891 static void fbcon_suspended(struct fb_info *info)
2892 {
2893         struct vc_data *vc = NULL;
2894         struct fbcon_ops *ops = info->fbcon_par;
2895
2896         if (!ops || ops->currcon < 0)
2897                 return;
2898         vc = vc_cons[ops->currcon].d;
2899
2900         /* Clear cursor, restore saved data */
2901         fbcon_cursor(vc, CM_ERASE);
2902 }
2903
2904 static void fbcon_resumed(struct fb_info *info)
2905 {
2906         struct vc_data *vc;
2907         struct fbcon_ops *ops = info->fbcon_par;
2908
2909         if (!ops || ops->currcon < 0)
2910                 return;
2911         vc = vc_cons[ops->currcon].d;
2912
2913         update_screen(vc);
2914 }
2915
2916 static void fbcon_modechanged(struct fb_info *info)
2917 {
2918         struct fbcon_ops *ops = info->fbcon_par;
2919         struct vc_data *vc;
2920         struct display *p;
2921         int rows, cols;
2922
2923         if (!ops || ops->currcon < 0)
2924                 return;
2925         vc = vc_cons[ops->currcon].d;
2926         if (vc->vc_mode != KD_TEXT ||
2927             registered_fb[con2fb_map[ops->currcon]] != info)
2928                 return;
2929
2930         p = &fb_display[vc->vc_num];
2931         set_blitting_type(vc, info);
2932
2933         if (CON_IS_VISIBLE(vc)) {
2934                 var_to_display(p, &info->var, info);
2935                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2936                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2937                 cols /= vc->vc_font.width;
2938                 rows /= vc->vc_font.height;
2939                 vc_resize(vc, cols, rows);
2940                 updatescrollmode(p, info, vc);
2941                 scrollback_max = 0;
2942                 scrollback_current = 0;
2943
2944                 if (!fbcon_is_inactive(vc, info)) {
2945                     ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2946                     ops->update_start(info);
2947                 }
2948
2949                 fbcon_set_palette(vc, color_table);
2950                 update_screen(vc);
2951                 if (softback_buf)
2952                         fbcon_update_softback(vc);
2953         }
2954 }
2955
2956 static void fbcon_set_all_vcs(struct fb_info *info)
2957 {
2958         struct fbcon_ops *ops = info->fbcon_par;
2959         struct vc_data *vc;
2960         struct display *p;
2961         int i, rows, cols, fg = -1;
2962
2963         if (!ops || ops->currcon < 0)
2964                 return;
2965
2966         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2967                 vc = vc_cons[i].d;
2968                 if (!vc || vc->vc_mode != KD_TEXT ||
2969                     registered_fb[con2fb_map[i]] != info)
2970                         continue;
2971
2972                 if (CON_IS_VISIBLE(vc)) {
2973                         fg = i;
2974                         continue;
2975                 }
2976
2977                 p = &fb_display[vc->vc_num];
2978                 set_blitting_type(vc, info);
2979                 var_to_display(p, &info->var, info);
2980                 cols = FBCON_SWAP(p->rotate, info->var.xres, info->var.yres);
2981                 rows = FBCON_SWAP(p->rotate, info->var.yres, info->var.xres);
2982                 cols /= vc->vc_font.width;
2983                 rows /= vc->vc_font.height;
2984                 vc_resize(vc, cols, rows);
2985         }
2986
2987         if (fg != -1)
2988                 fbcon_modechanged(info);
2989 }
2990
2991 static int fbcon_mode_deleted(struct fb_info *info,
2992                               struct fb_videomode *mode)
2993 {
2994         struct fb_info *fb_info;
2995         struct display *p;
2996         int i, j, found = 0;
2997
2998         /* before deletion, ensure that mode is not in use */
2999         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3000                 j = con2fb_map[i];
3001                 if (j == -1)
3002                         continue;
3003                 fb_info = registered_fb[j];
3004                 if (fb_info != info)
3005                         continue;
3006                 p = &fb_display[i];
3007                 if (!p || !p->mode)
3008                         continue;
3009                 if (fb_mode_is_equal(p->mode, mode)) {
3010                         found = 1;
3011                         break;
3012                 }
3013         }
3014         return found;
3015 }
3016
3017 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
3018 static int fbcon_unbind(void)
3019 {
3020         int ret;
3021
3022         ret = unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
3023                                 fbcon_is_default);
3024         return ret;
3025 }
3026 #else
3027 static inline int fbcon_unbind(void)
3028 {
3029         return -EINVAL;
3030 }
3031 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3032
3033 static int fbcon_fb_unbind(int idx)
3034 {
3035         int i, new_idx = -1, ret = 0;
3036
3037         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3038                 if (con2fb_map[i] != idx &&
3039                     con2fb_map[i] != -1) {
3040                         new_idx = i;
3041                         break;
3042                 }
3043         }
3044
3045         if (new_idx != -1) {
3046                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3047                         if (con2fb_map[i] == idx)
3048                                 set_con2fb_map(i, new_idx, 0);
3049                 }
3050         } else
3051                 ret = fbcon_unbind();
3052
3053         return ret;
3054 }
3055
3056 static int fbcon_fb_unregistered(struct fb_info *info)
3057 {
3058         int i, idx = info->node;
3059
3060         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3061                 if (con2fb_map[i] == idx)
3062                         con2fb_map[i] = -1;
3063         }
3064
3065         if (idx == info_idx) {
3066                 info_idx = -1;
3067
3068                 for (i = 0; i < FB_MAX; i++) {
3069                         if (registered_fb[i] != NULL) {
3070                                 info_idx = i;
3071                                 break;
3072                         }
3073                 }
3074         }
3075
3076         if (info_idx != -1) {
3077                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3078                         if (con2fb_map[i] == -1)
3079                                 con2fb_map[i] = info_idx;
3080                 }
3081         }
3082
3083         if (!num_registered_fb)
3084                 unregister_con_driver(&fb_con);
3085
3086
3087         if (primary_device == idx)
3088                 primary_device = -1;
3089
3090         return 0;
3091 }
3092
3093 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
3094 static void fbcon_select_primary(struct fb_info *info)
3095 {
3096         if (!map_override && primary_device == -1 &&
3097             fb_is_primary_device(info)) {
3098                 int i;
3099
3100                 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n",
3101                        info->fix.id, info->node);
3102                 primary_device = info->node;
3103
3104                 for (i = first_fb_vc; i <= last_fb_vc; i++)
3105                         con2fb_map_boot[i] = primary_device;
3106
3107                 if (con_is_bound(&fb_con)) {
3108                         printk(KERN_INFO "fbcon: Remapping primary device, "
3109                                "fb%i, to tty %i-%i\n", info->node,
3110                                first_fb_vc + 1, last_fb_vc + 1);
3111                         info_idx = primary_device;
3112                 }
3113         }
3114
3115 }
3116 #else
3117 static inline void fbcon_select_primary(struct fb_info *info)
3118 {
3119         return;
3120 }
3121 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
3122
3123 static int fbcon_fb_registered(struct fb_info *info)
3124 {
3125         int ret = 0, i, idx = info->node;
3126
3127         fbcon_select_primary(info);
3128
3129         if (info_idx == -1) {
3130                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3131                         if (con2fb_map_boot[i] == idx) {
3132                                 info_idx = idx;
3133                                 break;
3134                         }
3135                 }
3136
3137                 if (info_idx != -1)
3138                         ret = fbcon_takeover(1);
3139         } else {
3140                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3141                         if (con2fb_map_boot[i] == idx)
3142                                 set_con2fb_map(i, idx, 0);
3143                 }
3144         }
3145
3146         return ret;
3147 }
3148
3149 static void fbcon_fb_blanked(struct fb_info *info, int blank)
3150 {
3151         struct fbcon_ops *ops = info->fbcon_par;
3152         struct vc_data *vc;
3153
3154         if (!ops || ops->currcon < 0)
3155                 return;
3156
3157         vc = vc_cons[ops->currcon].d;
3158         if (vc->vc_mode != KD_TEXT ||
3159                         registered_fb[con2fb_map[ops->currcon]] != info)
3160                 return;
3161
3162         if (CON_IS_VISIBLE(vc)) {
3163                 if (blank)
3164                         do_blank_screen(0);
3165                 else
3166                         do_unblank_screen(0);
3167         }
3168         ops->blank_state = blank;
3169 }
3170
3171 static void fbcon_new_modelist(struct fb_info *info)
3172 {
3173         int i;
3174         struct vc_data *vc;
3175         struct fb_var_screeninfo var;
3176         const struct fb_videomode *mode;
3177
3178         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3179                 if (registered_fb[con2fb_map[i]] != info)
3180                         continue;
3181                 if (!fb_display[i].mode)
3182                         continue;
3183                 vc = vc_cons[i].d;
3184                 display_to_var(&var, &fb_display[i]);
3185                 mode = fb_find_nearest_mode(fb_display[i].mode,
3186                                             &info->modelist);
3187                 fb_videomode_to_var(&var, mode);
3188                 fbcon_set_disp(info, &var, vc->vc_num);
3189         }
3190 }
3191
3192 static void fbcon_get_requirement(struct fb_info *info,
3193                                   struct fb_blit_caps *caps)
3194 {
3195         struct vc_data *vc;
3196         struct display *p;
3197
3198         if (caps->flags) {
3199                 int i, charcnt;
3200
3201                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3202                         vc = vc_cons[i].d;
3203                         if (vc && vc->vc_mode == KD_TEXT &&
3204                             info->node == con2fb_map[i]) {
3205                                 p = &fb_display[i];
3206                                 caps->x |= 1 << (vc->vc_font.width - 1);
3207                                 caps->y |= 1 << (vc->vc_font.height - 1);
3208                                 charcnt = (p->userfont) ?
3209                                         FNTCHARCNT(p->fontdata) : 256;
3210                                 if (caps->len < charcnt)
3211                                         caps->len = charcnt;
3212                         }
3213                 }
3214         } else {
3215                 vc = vc_cons[fg_console].d;
3216
3217                 if (vc && vc->vc_mode == KD_TEXT &&
3218                     info->node == con2fb_map[fg_console]) {
3219                         p = &fb_display[fg_console];
3220                         caps->x = 1 << (vc->vc_font.width - 1);
3221                         caps->y = 1 << (vc->vc_font.height - 1);
3222                         caps->len = (p->userfont) ?
3223                                 FNTCHARCNT(p->fontdata) : 256;
3224                 }
3225         }
3226 }
3227
3228 static int fbcon_event_notify(struct notifier_block *self,
3229                               unsigned long action, void *data)
3230 {
3231         struct fb_event *event = data;
3232         struct fb_info *info = event->info;
3233         struct fb_videomode *mode;
3234         struct fb_con2fbmap *con2fb;
3235         struct fb_blit_caps *caps;
3236         int ret = 0;
3237
3238         /*
3239          * ignore all events except driver registration and deregistration
3240          * if fbcon is not active
3241          */
3242         if (fbcon_has_exited && !(action == FB_EVENT_FB_REGISTERED ||
3243                                   action == FB_EVENT_FB_UNREGISTERED))
3244                 goto done;
3245
3246         switch(action) {
3247         case FB_EVENT_SUSPEND:
3248                 fbcon_suspended(info);
3249                 break;
3250         case FB_EVENT_RESUME:
3251                 fbcon_resumed(info);
3252                 break;
3253         case FB_EVENT_MODE_CHANGE:
3254                 fbcon_modechanged(info);
3255                 break;
3256         case FB_EVENT_MODE_CHANGE_ALL:
3257                 fbcon_set_all_vcs(info);
3258                 break;
3259         case FB_EVENT_MODE_DELETE:
3260                 mode = event->data;
3261                 ret = fbcon_mode_deleted(info, mode);
3262                 break;
3263         case FB_EVENT_FB_UNBIND:
3264                 ret = fbcon_fb_unbind(info->node);
3265                 break;
3266         case FB_EVENT_FB_REGISTERED:
3267                 ret = fbcon_fb_registered(info);
3268                 break;
3269         case FB_EVENT_FB_UNREGISTERED:
3270                 ret = fbcon_fb_unregistered(info);
3271                 break;
3272         case FB_EVENT_SET_CONSOLE_MAP:
3273                 con2fb = event->data;
3274                 ret = set_con2fb_map(con2fb->console - 1,
3275                                      con2fb->framebuffer, 1);
3276                 break;
3277         case FB_EVENT_GET_CONSOLE_MAP:
3278                 con2fb = event->data;
3279                 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
3280                 break;
3281         case FB_EVENT_BLANK:
3282                 fbcon_fb_blanked(info, *(int *)event->data);
3283                 break;
3284         case FB_EVENT_NEW_MODELIST:
3285                 fbcon_new_modelist(info);
3286                 break;
3287         case FB_EVENT_GET_REQ:
3288                 caps = event->data;
3289                 fbcon_get_requirement(info, caps);
3290                 break;
3291         }
3292
3293 done:
3294         return ret;
3295 }
3296
3297 /*
3298  *  The console `switch' structure for the frame buffer based console
3299  */
3300
3301 static const struct consw fb_con = {
3302         .owner                  = THIS_MODULE,
3303         .con_startup            = fbcon_startup,
3304         .con_init               = fbcon_init,
3305         .con_deinit             = fbcon_deinit,
3306         .con_clear              = fbcon_clear,
3307         .con_putc               = fbcon_putc,
3308         .con_putcs              = fbcon_putcs,
3309         .con_cursor             = fbcon_cursor,
3310         .con_scroll             = fbcon_scroll,
3311         .con_bmove              = fbcon_bmove,
3312         .con_switch             = fbcon_switch,
3313         .con_blank              = fbcon_blank,
3314         .con_font_set           = fbcon_set_font,
3315         .con_font_get           = fbcon_get_font,
3316         .con_font_default       = fbcon_set_def_font,
3317         .con_font_copy          = fbcon_copy_font,
3318         .con_set_palette        = fbcon_set_palette,
3319         .con_scrolldelta        = fbcon_scrolldelta,
3320         .con_set_origin         = fbcon_set_origin,
3321         .con_invert_region      = fbcon_invert_region,
3322         .con_screen_pos         = fbcon_screen_pos,
3323         .con_getxy              = fbcon_getxy,
3324         .con_resize             = fbcon_resize,
3325 };
3326
3327 static struct notifier_block fbcon_event_notifier = {
3328         .notifier_call  = fbcon_event_notify,
3329 };
3330
3331 static ssize_t store_rotate(struct device *device,
3332                             struct device_attribute *attr, const char *buf,
3333                             size_t count)
3334 {
3335         struct fb_info *info;
3336         int rotate, idx;
3337         char **last = NULL;
3338
3339         if (fbcon_has_exited)
3340                 return count;
3341
3342         acquire_console_sem();
3343         idx = con2fb_map[fg_console];
3344
3345         if (idx == -1 || registered_fb[idx] == NULL)
3346                 goto err;
3347
3348         info = registered_fb[idx];
3349         rotate = simple_strtoul(buf, last, 0);
3350         fbcon_rotate(info, rotate);
3351 err:
3352         release_console_sem();
3353         return count;
3354 }
3355
3356 static ssize_t store_rotate_all(struct device *device,
3357                                 struct device_attribute *attr,const char *buf,
3358                                 size_t count)
3359 {
3360         struct fb_info *info;
3361         int rotate, idx;
3362         char **last = NULL;
3363
3364         if (fbcon_has_exited)
3365                 return count;
3366
3367         acquire_console_sem();
3368         idx = con2fb_map[fg_console];
3369
3370         if (idx == -1 || registered_fb[idx] == NULL)
3371                 goto err;
3372
3373         info = registered_fb[idx];
3374         rotate = simple_strtoul(buf, last, 0);
3375         fbcon_rotate_all(info, rotate);
3376 err:
3377         release_console_sem();
3378         return count;
3379 }
3380
3381 static ssize_t show_rotate(struct device *device,
3382                            struct device_attribute *attr,char *buf)
3383 {
3384         struct fb_info *info;
3385         int rotate = 0, idx;
3386
3387         if (fbcon_has_exited)
3388                 return 0;
3389
3390         acquire_console_sem();
3391         idx = con2fb_map[fg_console];
3392
3393         if (idx == -1 || registered_fb[idx] == NULL)
3394                 goto err;
3395
3396         info = registered_fb[idx];
3397         rotate = fbcon_get_rotate(info);
3398 err:
3399         release_console_sem();
3400         return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3401 }
3402
3403 static ssize_t show_cursor_blink(struct device *device,
3404                                  struct device_attribute *attr, char *buf)
3405 {
3406         struct fb_info *info;
3407         struct fbcon_ops *ops;
3408         int idx, blink = -1;
3409
3410         if (fbcon_has_exited)
3411                 return 0;
3412
3413         acquire_console_sem();
3414         idx = con2fb_map[fg_console];
3415
3416         if (idx == -1 || registered_fb[idx] == NULL)
3417                 goto err;
3418
3419         info = registered_fb[idx];
3420         ops = info->fbcon_par;
3421
3422         if (!ops)
3423                 goto err;
3424
3425         blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0;
3426 err:
3427         release_console_sem();
3428         return snprintf(buf, PAGE_SIZE, "%d\n", blink);
3429 }
3430
3431 static ssize_t store_cursor_blink(struct device *device,
3432                                   struct device_attribute *attr,
3433                                   const char *buf, size_t count)
3434 {
3435         struct fb_info *info;
3436         int blink, idx;
3437         char **last = NULL;
3438
3439         if (fbcon_has_exited)
3440                 return count;
3441
3442         acquire_console_sem();
3443         idx = con2fb_map[fg_console];
3444
3445         if (idx == -1 || registered_fb[idx] == NULL)
3446                 goto err;
3447
3448         info = registered_fb[idx];
3449
3450         if (!info->fbcon_par)
3451                 goto err;
3452
3453         blink = simple_strtoul(buf, last, 0);
3454
3455         if (blink) {
3456                 fbcon_cursor_noblink = 0;
3457                 fbcon_add_cursor_timer(info);
3458         } else {
3459                 fbcon_cursor_noblink = 1;
3460                 fbcon_del_cursor_timer(info);
3461         }
3462
3463 err:
3464         release_console_sem();
3465         return count;
3466 }
3467
3468 static struct device_attribute device_attrs[] = {
3469         __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3470         __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3471         __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink,
3472                store_cursor_blink),
3473 };
3474
3475 static int fbcon_init_device(void)
3476 {
3477         int i, error = 0;
3478
3479         fbcon_has_sysfs = 1;
3480
3481         for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3482                 error = device_create_file(fbcon_device, &device_attrs[i]);
3483
3484                 if (error)
3485                         break;
3486         }
3487
3488         if (error) {
3489                 while (--i >= 0)
3490                         device_remove_file(fbcon_device, &device_attrs[i]);
3491
3492                 fbcon_has_sysfs = 0;
3493         }
3494
3495         return 0;
3496 }
3497
3498 static void fbcon_start(void)
3499 {
3500         if (num_registered_fb) {
3501                 int i;
3502
3503                 acquire_console_sem();
3504
3505                 for (i = 0; i < FB_MAX; i++) {
3506                         if (registered_fb[i] != NULL) {
3507                                 info_idx = i;
3508                                 break;
3509                         }
3510                 }
3511
3512                 release_console_sem();
3513                 fbcon_takeover(0);
3514         }
3515 }
3516
3517 static void fbcon_exit(void)
3518 {
3519         struct fb_info *info;
3520         int i, j, mapped;
3521
3522         if (fbcon_has_exited)
3523                 return;
3524
3525 #ifdef CONFIG_ATARI
3526         free_irq(IRQ_AUTO_4, fb_vbl_handler);
3527 #endif
3528 #ifdef CONFIG_MAC
3529         if (MACH_IS_MAC && vbl_detected)
3530                 free_irq(IRQ_MAC_VBL, fb_vbl_handler);
3531 #endif
3532
3533         kfree((void *)softback_buf);
3534         softback_buf = 0UL;
3535
3536         for (i = 0; i < FB_MAX; i++) {
3537                 mapped = 0;
3538                 info = registered_fb[i];
3539
3540                 if (info == NULL)
3541                         continue;
3542
3543                 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3544                         if (con2fb_map[j] == i)
3545                                 mapped = 1;
3546                 }
3547
3548                 if (mapped) {
3549                         if (info->fbops->fb_release)
3550                                 info->fbops->fb_release(info, 0);
3551                         module_put(info->fbops->owner);
3552
3553                         if (info->fbcon_par) {
3554                                 struct fbcon_ops *ops = info->fbcon_par;
3555
3556                                 fbcon_del_cursor_timer(info);
3557                                 kfree(ops->cursor_src);
3558                                 kfree(info->fbcon_par);
3559                                 info->fbcon_par = NULL;
3560                         }
3561
3562                         if (info->queue.func == fb_flashcursor)
3563                                 info->queue.func = NULL;
3564                 }
3565         }
3566
3567         fbcon_has_exited = 1;
3568 }
3569
3570 static int __init fb_console_init(void)
3571 {
3572         int i;
3573
3574         acquire_console_sem();
3575         fb_register_client(&fbcon_event_notifier);
3576         fbcon_device = device_create_drvdata(fb_class, NULL, MKDEV(0, 0),
3577                                              NULL, "fbcon");
3578
3579         if (IS_ERR(fbcon_device)) {
3580                 printk(KERN_WARNING "Unable to create device "
3581                        "for fbcon; errno = %ld\n",
3582                        PTR_ERR(fbcon_device));
3583                 fbcon_device = NULL;
3584         } else
3585                 fbcon_init_device();
3586
3587         for (i = 0; i < MAX_NR_CONSOLES; i++)
3588                 con2fb_map[i] = -1;
3589
3590         release_console_sem();
3591         fbcon_start();
3592         return 0;
3593 }
3594
3595 module_init(fb_console_init);
3596
3597 #ifdef MODULE
3598
3599 static void __exit fbcon_deinit_device(void)
3600 {
3601         int i;
3602
3603         if (fbcon_has_sysfs) {
3604                 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3605                         device_remove_file(fbcon_device, &device_attrs[i]);
3606
3607                 fbcon_has_sysfs = 0;
3608         }
3609 }
3610
3611 static void __exit fb_console_exit(void)
3612 {
3613         acquire_console_sem();
3614         fb_unregister_client(&fbcon_event_notifier);
3615         fbcon_deinit_device();
3616         device_destroy(fb_class, MKDEV(0, 0));
3617         fbcon_exit();
3618         release_console_sem();
3619         unregister_con_driver(&fb_con);
3620 }
3621
3622 module_exit(fb_console_exit);
3623
3624 #endif
3625
3626 MODULE_LICENSE("GPL");