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
  81 #include "fbcon.h"
  82
  83 #ifdef FBCONDEBUG
  84 #  define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __func__ , ## args)
  85 #else
  86 #  define DPRINTK(fmt, args...)
  87 #endif
  88
  89 enum {
  90         FBCON_LOGO_CANSHOW      = -1,   /* the logo can be shown */
  91         FBCON_LOGO_DRAW         = -2,   /* draw the logo to a console */
  92         FBCON_LOGO_DONTSHOW     = -3    /* do not show the logo */
  93 };
  94
  95 static struct display fb_display[MAX_NR_CONSOLES];
  96
  97 static signed char con2fb_map[MAX_NR_CONSOLES];
  98 static signed char con2fb_map_boot[MAX_NR_CONSOLES];
  99
 100 static int logo_lines;
 101 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
 102    enums.  */
 103 static int logo_shown = FBCON_LOGO_CANSHOW;
 104 /* Software scrollback */
 105 static int fbcon_softback_size = 32768;
 106 static unsigned long softback_buf, softback_curr;
 107 static unsigned long softback_in;
 108 static unsigned long softback_top, softback_end;
 109 static int softback_lines;
 110 /* console mappings */
 111 static int first_fb_vc;
 112 static int last_fb_vc = MAX_NR_CONSOLES - 1;
 113 static int fbcon_is_default = 1;
 114 static int fbcon_has_exited;
 115 static int primary_device = -1;
 116 static int fbcon_has_console_bind;
 117
 118 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
 119 static int map_override;
 120
 121 static inline void fbcon_map_override(void)
 122 {
 123         map_override = 1;
 124 }
 125 #else
 126 static inline void fbcon_map_override(void)
 127 {
 128 }
 129 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY */
 130
 131 /* font data */
 132 static char fontname[40];
 133
 134 /* current fb_info */
 135 static int info_idx = -1;
 136
 137 /* console rotation */
 138 static int initial_rotation;
 139 static int fbcon_has_sysfs;
 140
 141 static const struct consw fb_con;
 142
 143 #define CM_SOFTBACK     (8)
 144
 145 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
 146
 147 static int fbcon_set_origin(struct vc_data *);
 148
 149 #define CURSOR_DRAW_DELAY               (1)
 150
 151 static int vbl_cursor_cnt;
 152 static int fbcon_cursor_noblink;
 153
 154 #define divides(a, b)   ((!(a) || (b)%(a)) ? 0 : 1)
 155
 156 /*
 157  *  Interface used by the world
 158  */
 159
 160 static const char *fbcon_startup(void);
 161 static void fbcon_init(struct vc_data *vc, int init);
 162 static void fbcon_deinit(struct vc_data *vc);
 163 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
 164                         int width);
 165 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
 166 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
 167                         int count, int ypos, int xpos);
 168 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
 169 static void fbcon_cursor(struct vc_data *vc, int mode);
 170 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
 171                         int count);
 172 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
 173                         int height, int width);
 174 static int fbcon_switch(struct vc_data *vc);
 175 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
 176 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table);
 177 static int fbcon_scrolldelta(struct vc_data *vc, int lines);
 178
 179 /*
 180  *  Internal routines
 181  */
 182 static __inline__ void ywrap_up(struct vc_data *vc, int count);
 183 static __inline__ void ywrap_down(struct vc_data *vc, int count);
 184 static __inline__ void ypan_up(struct vc_data *vc, int count);
 185 static __inline__ void ypan_down(struct vc_data *vc, int count);
 186 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
 187                             int dy, int dx, int height, int width, u_int y_break);
 188 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
 189                            int unit);
 190 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
 191                               int line, int count, int dy);
 192 static void fbcon_modechanged(struct fb_info *info);
 193 static void fbcon_set_all_vcs(struct fb_info *info);
 194 static void fbcon_start(void);
 195 static void fbcon_exit(void);
 196 static struct device *fbcon_device;
 197
 198 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
 199 static inline void fbcon_set_rotation(struct fb_info *info)
 200 {
 201         struct fbcon_ops *ops = info->fbcon_par;
 202
 203         if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
 204             ops->p->con_rotate < 4)
 205                 ops->rotate = ops->p->con_rotate;
 206         else
 207                 ops->rotate = 0;
 208 }
 209
 210 static void fbcon_rotate(struct fb_info *info, u32 rotate)
 211 {
 212         struct fbcon_ops *ops= info->fbcon_par;
 213         struct fb_info *fb_info;
 214
 215         if (!ops || ops->currcon == -1)
 216                 return;
 217
 218         fb_info = registered_fb[con2fb_map[ops->currcon]];
 219
 220         if (info == fb_info) {
 221                 struct display *p = &fb_display[ops->currcon];
 222
 223                 if (rotate < 4)
 224                         p->con_rotate = rotate;
 225                 else
 226                         p->con_rotate = 0;
 227
 228                 fbcon_modechanged(info);
 229         }
 230 }
 231
 232 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
 233 {
 234         struct fbcon_ops *ops = info->fbcon_par;
 235         struct vc_data *vc;
 236         struct display *p;
 237         int i;
 238
 239         if (!ops || ops->currcon < 0 || rotate > 3)
 240                 return;
 241
 242         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 243                 vc = vc_cons[i].d;
 244                 if (!vc || vc->vc_mode != KD_TEXT ||
 245                     registered_fb[con2fb_map[i]] != info)
 246                         continue;
 247
 248                 p = &fb_display[vc->vc_num];
 249                 p->con_rotate = rotate;
 250         }
 251
 252         fbcon_set_all_vcs(info);
 253 }
 254 #else
 255 static inline void fbcon_set_rotation(struct fb_info *info)
 256 {
 257         struct fbcon_ops *ops = info->fbcon_par;
 258
 259         ops->rotate = FB_ROTATE_UR;
 260 }
 261
 262 static void fbcon_rotate(struct fb_info *info, u32 rotate)
 263 {
 264         return;
 265 }
 266
 267 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
 268 {
 269         return;
 270 }
 271 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
 272
 273 static int fbcon_get_rotate(struct fb_info *info)
 274 {
 275         struct fbcon_ops *ops = info->fbcon_par;
 276
 277         return (ops) ? ops->rotate : 0;
 278 }
 279
 280 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
 281 {
 282         struct fbcon_ops *ops = info->fbcon_par;
 283
 284         return (info->state != FBINFO_STATE_RUNNING ||
 285                 vc->vc_mode != KD_TEXT || ops->graphics) &&
 286                 !vt_force_oops_output(vc);
 287 }
 288
 289 static int get_color(struct vc_data *vc, struct fb_info *info,
 290               u16 c, int is_fg)
 291 {
 292         int depth = fb_get_color_depth(&info->var, &info->fix);
 293         int color = 0;
 294
 295         if (console_blanked) {
 296                 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
 297
 298                 c = vc->vc_video_erase_char & charmask;
 299         }
 300
 301         if (depth != 1)
 302                 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
 303                         : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
 304
 305         switch (depth) {
 306         case 1:
 307         {
 308                 int col = mono_col(info);
 309                 /* 0 or 1 */
 310                 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
 311                 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
 312
 313                 if (console_blanked)
 314                         fg = bg;
 315
 316                 color = (is_fg) ? fg : bg;
 317                 break;
 318         }
 319         case 2:
 320                 /*
 321                  * Scale down 16-colors to 4 colors. Default 4-color palette
 322                  * is grayscale. However, simply dividing the values by 4
 323                  * will not work, as colors 1, 2 and 3 will be scaled-down
 324                  * to zero rendering them invisible.  So empirically convert
 325                  * colors to a sane 4-level grayscale.
 326                  */
 327                 switch (color) {
 328                 case 0:
 329                         color = 0; /* black */
 330                         break;
 331                 case 1 ... 6:
 332                         color = 2; /* white */
 333                         break;
 334                 case 7 ... 8:
 335                         color = 1; /* gray */
 336                         break;
 337                 default:
 338                         color = 3; /* intense white */
 339                         break;
 340                 }
 341                 break;
 342         case 3:
 343                 /*
 344                  * Last 8 entries of default 16-color palette is a more intense
 345                  * version of the first 8 (i.e., same chrominance, different
 346                  * luminance).
 347                  */
 348                 color &= 7;
 349                 break;
 350         }
 351
 352
 353         return color;
 354 }
 355
 356 static void fbcon_update_softback(struct vc_data *vc)
 357 {
 358         int l = fbcon_softback_size / vc->vc_size_row;
 359
 360         if (l > 5)
 361                 softback_end = softback_buf + l * vc->vc_size_row;
 362         else
 363                 /* Smaller scrollback makes no sense, and 0 would screw
 364                    the operation totally */
 365                 softback_top = 0;
 366 }
 367
 368 static void fb_flashcursor(struct work_struct *work)
 369 {
 370         struct fb_info *info = container_of(work, struct fb_info, queue);
 371         struct fbcon_ops *ops = info->fbcon_par;
 372         struct vc_data *vc = NULL;
 373         int c;
 374         int mode;
 375         int ret;
 376
 377         /* FIXME: we should sort out the unbind locking instead */
 378         /* instead we just fail to flash the cursor if we can't get
 379          * the lock instead of blocking fbcon deinit */
 380         ret = console_trylock();
 381         if (ret == 0)
 382                 return;
 383
 384         if (ops && ops->currcon != -1)
 385                 vc = vc_cons[ops->currcon].d;
 386
 387         if (!vc || !CON_IS_VISIBLE(vc) ||
 388             registered_fb[con2fb_map[vc->vc_num]] != info ||
 389             vc->vc_deccm != 1) {
 390                 console_unlock();
 391                 return;
 392         }
 393
 394         c = scr_readw((u16 *) vc->vc_pos);
 395         mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
 396                 CM_ERASE : CM_DRAW;
 397         ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
 398                     get_color(vc, info, c, 0));
 399         console_unlock();
 400 }
 401
 402 static void cursor_timer_handler(unsigned long dev_addr)
 403 {
 404         struct fb_info *info = (struct fb_info *) dev_addr;
 405         struct fbcon_ops *ops = info->fbcon_par;
 406
 407         schedule_work(&info->queue);
 408         mod_timer(&ops->cursor_timer, jiffies + HZ/5);
 409 }
 410
 411 static void fbcon_add_cursor_timer(struct fb_info *info)
 412 {
 413         struct fbcon_ops *ops = info->fbcon_par;
 414
 415         if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
 416             !(ops->flags & FBCON_FLAGS_CURSOR_TIMER) &&
 417             !fbcon_cursor_noblink) {
 418                 if (!info->queue.func)
 419                         INIT_WORK(&info->queue, fb_flashcursor);
 420
 421                 init_timer(&ops->cursor_timer);
 422                 ops->cursor_timer.function = cursor_timer_handler;
 423                 ops->cursor_timer.expires = jiffies + HZ / 5;
 424                 ops->cursor_timer.data = (unsigned long ) info;
 425                 add_timer(&ops->cursor_timer);
 426                 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
 427         }
 428 }
 429
 430 static void fbcon_del_cursor_timer(struct fb_info *info)
 431 {
 432         struct fbcon_ops *ops = info->fbcon_par;
 433
 434         if (info->queue.func == fb_flashcursor &&
 435             ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
 436                 del_timer_sync(&ops->cursor_timer);
 437                 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
 438         }
 439 }
 440
 441 #ifndef MODULE
 442 static int __init fb_console_setup(char *this_opt)
 443 {
 444         char *options;
 445         int i, j;
 446
 447         if (!this_opt || !*this_opt)
 448                 return 1;
 449
 450         while ((options = strsep(&this_opt, ",")) != NULL) {
 451                 if (!strncmp(options, "font:", 5))
 452                         strlcpy(fontname, options + 5, sizeof(fontname));
 453
 454                 if (!strncmp(options, "scrollback:", 11)) {
 455                         options += 11;
 456                         if (*options) {
 457                                 fbcon_softback_size = simple_strtoul(options, &options, 0);
 458                                 if (*options == 'k' || *options == 'K') {
 459                                         fbcon_softback_size *= 1024;
 460                                         options++;
 461                                 }
 462                                 if (*options != ',')
 463                                         return 1;
 464                                 options++;
 465                         } else
 466                                 return 1;
 467                 }
 468
 469                 if (!strncmp(options, "map:", 4)) {
 470                         options += 4;
 471                         if (*options) {
 472                                 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
 473                                         if (!options[j])
 474                                                 j = 0;
 475                                         con2fb_map_boot[i] =
 476                                                 (options[j++]-'0') % FB_MAX;
 477                                 }
 478
 479                                 fbcon_map_override();
 480                         }
 481
 482                         return 1;
 483                 }
 484
 485                 if (!strncmp(options, "vc:", 3)) {
 486                         options += 3;
 487                         if (*options)
 488                                 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
 489                         if (first_fb_vc < 0)
 490                                 first_fb_vc = 0;
 491                         if (*options++ == '-')
 492                                 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
 493                         fbcon_is_default = 0;
 494                 }
 495
 496                 if (!strncmp(options, "rotate:", 7)) {
 497                         options += 7;
 498                         if (*options)
 499                                 initial_rotation = simple_strtoul(options, &options, 0);
 500                         if (initial_rotation > 3)
 501                                 initial_rotation = 0;
 502                 }
 503         }
 504         return 1;
 505 }
 506
 507 __setup("fbcon=", fb_console_setup);
 508 #endif
 509
 510 static int search_fb_in_map(int idx)
 511 {
 512         int i, retval = 0;
 513
 514         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 515                 if (con2fb_map[i] == idx)
 516                         retval = 1;
 517         }
 518         return retval;
 519 }
 520
 521 static int search_for_mapped_con(void)
 522 {
 523         int i, retval = 0;
 524
 525         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 526                 if (con2fb_map[i] != -1)
 527                         retval = 1;
 528         }
 529         return retval;
 530 }
 531
 532 static int do_fbcon_takeover(int show_logo)
 533 {
 534         int err, i;
 535
 536         if (!num_registered_fb)
 537                 return -ENODEV;
 538
 539         if (!show_logo)
 540                 logo_shown = FBCON_LOGO_DONTSHOW;
 541
 542         for (i = first_fb_vc; i <= last_fb_vc; i++)
 543                 con2fb_map[i] = info_idx;
 544
 545         err = do_take_over_console(&fb_con, first_fb_vc, last_fb_vc,
 546                                 fbcon_is_default);
 547
 548         if (err) {
 549                 for (i = first_fb_vc; i <= last_fb_vc; i++)
 550                         con2fb_map[i] = -1;
 551                 info_idx = -1;
 552         } else {
 553                 fbcon_has_console_bind = 1;
 554         }
 555
 556         return err;
 557 }
 558
 559 static int fbcon_takeover(int show_logo)
 560 {
 561         int err, i;
 562
 563         if (!num_registered_fb)
 564                 return -ENODEV;
 565
 566         if (!show_logo)
 567                 logo_shown = FBCON_LOGO_DONTSHOW;
 568
 569         for (i = first_fb_vc; i <= last_fb_vc; i++)
 570                 con2fb_map[i] = info_idx;
 571
 572         err = take_over_console(&fb_con, first_fb_vc, last_fb_vc,
 573                                 fbcon_is_default);
 574
 575         if (err) {
 576                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
 577                         con2fb_map[i] = -1;
 578                 }
 579                 info_idx = -1;
 580         } else {
 581                 fbcon_has_console_bind = 1;
 582         }
 583
 584         return err;
 585 }
 586
 587 #ifdef MODULE
 588 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
 589                                int cols, int rows, int new_cols, int new_rows)
 590 {
 591         logo_shown = FBCON_LOGO_DONTSHOW;
 592 }
 593 #else
 594 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
 595                                int cols, int rows, int new_cols, int new_rows)
 596 {
 597         /* Need to make room for the logo */
 598         struct fbcon_ops *ops = info->fbcon_par;
 599         int cnt, erase = vc->vc_video_erase_char, step;
 600         unsigned short *save = NULL, *r, *q;
 601         int logo_height;
 602
 603         if (info->flags & FBINFO_MODULE) {
 604                 logo_shown = FBCON_LOGO_DONTSHOW;
 605                 return;
 606         }
 607
 608         /*
 609          * remove underline attribute from erase character
 610          * if black and white framebuffer.
 611          */
 612         if (fb_get_color_depth(&info->var, &info->fix) == 1)
 613                 erase &= ~0x400;
 614         logo_height = fb_prepare_logo(info, ops->rotate);
 615         logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height);
 616         q = (unsigned short *) (vc->vc_origin +
 617                                 vc->vc_size_row * rows);
 618         step = logo_lines * cols;
 619         for (r = q - logo_lines * cols; r < q; r++)
 620                 if (scr_readw(r) != vc->vc_video_erase_char)
 621                         break;
 622         if (r != q && new_rows >= rows + logo_lines) {
 623                 save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
 624                 if (save) {
 625                         int i = cols < new_cols ? cols : new_cols;
 626                         scr_memsetw(save, erase, logo_lines * new_cols * 2);
 627                         r = q - step;
 628                         for (cnt = 0; cnt < logo_lines; cnt++, r += i)
 629                                 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
 630                         r = q;
 631                 }
 632         }
 633         if (r == q) {
 634                 /* We can scroll screen down */
 635                 r = q - step - cols;
 636                 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
 637                         scr_memcpyw(r + step, r, vc->vc_size_row);
 638                         r -= cols;
 639                 }
 640                 if (!save) {
 641                         int lines;
 642                         if (vc->vc_y + logo_lines >= rows)
 643                                 lines = rows - vc->vc_y - 1;
 644                         else
 645                                 lines = logo_lines;
 646                         vc->vc_y += lines;
 647                         vc->vc_pos += lines * vc->vc_size_row;
 648                 }
 649         }
 650         scr_memsetw((unsigned short *) vc->vc_origin,
 651                     erase,
 652                     vc->vc_size_row * logo_lines);
 653
 654         if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
 655                 fbcon_clear_margins(vc, 0);
 656                 update_screen(vc);
 657         }
 658
 659         if (save) {
 660                 q = (unsigned short *) (vc->vc_origin +
 661                                         vc->vc_size_row *
 662                                         rows);
 663                 scr_memcpyw(q, save, logo_lines * new_cols * 2);
 664                 vc->vc_y += logo_lines;
 665                 vc->vc_pos += logo_lines * vc->vc_size_row;
 666                 kfree(save);
 667         }
 668
 669         if (logo_lines > vc->vc_bottom) {
 670                 logo_shown = FBCON_LOGO_CANSHOW;
 671                 printk(KERN_INFO
 672                        "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
 673         } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
 674                 logo_shown = FBCON_LOGO_DRAW;
 675                 vc->vc_top = logo_lines;
 676         }
 677 }
 678 #endif /* MODULE */
 679
 680 #ifdef CONFIG_FB_TILEBLITTING
 681 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
 682 {
 683         struct fbcon_ops *ops = info->fbcon_par;
 684
 685         ops->p = &fb_display[vc->vc_num];
 686
 687         if ((info->flags & FBINFO_MISC_TILEBLITTING))
 688                 fbcon_set_tileops(vc, info);
 689         else {
 690                 fbcon_set_rotation(info);
 691                 fbcon_set_bitops(ops);
 692         }
 693 }
 694
 695 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
 696 {
 697         int err = 0;
 698
 699         if (info->flags & FBINFO_MISC_TILEBLITTING &&
 700             info->tileops->fb_get_tilemax(info) < charcount)
 701                 err = 1;
 702
 703         return err;
 704 }
 705 #else
 706 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
 707 {
 708         struct fbcon_ops *ops = info->fbcon_par;
 709
 710         info->flags &= ~FBINFO_MISC_TILEBLITTING;
 711         ops->p = &fb_display[vc->vc_num];
 712         fbcon_set_rotation(info);
 713         fbcon_set_bitops(ops);
 714 }
 715
 716 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
 717 {
 718         return 0;
 719 }
 720
 721 #endif /* CONFIG_MISC_TILEBLITTING */
 722
 723
 724 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
 725                                   int unit, int oldidx)
 726 {
 727         struct fbcon_ops *ops = NULL;
 728         int err = 0;
 729
 730         if (!try_module_get(info->fbops->owner))
 731                 err = -ENODEV;
 732
 733         if (!err && info->fbops->fb_open &&
 734             info->fbops->fb_open(info, 0))
 735                 err = -ENODEV;
 736
 737         if (!err) {
 738                 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
 739                 if (!ops)
 740                         err = -ENOMEM;
 741         }
 742
 743         if (!err) {
 744                 info->fbcon_par = ops;
 745
 746                 if (vc)
 747                         set_blitting_type(vc, info);
 748         }
 749
 750         if (err) {
 751                 con2fb_map[unit] = oldidx;
 752                 module_put(info->fbops->owner);
 753         }
 754
 755         return err;
 756 }
 757
 758 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
 759                                   struct fb_info *newinfo, int unit,
 760                                   int oldidx, int found)
 761 {
 762         struct fbcon_ops *ops = oldinfo->fbcon_par;
 763         int err = 0, ret;
 764
 765         if (oldinfo->fbops->fb_release &&
 766             oldinfo->fbops->fb_release(oldinfo, 0)) {
 767                 con2fb_map[unit] = oldidx;
 768                 if (!found && newinfo->fbops->fb_release)
 769                         newinfo->fbops->fb_release(newinfo, 0);
 770                 if (!found)
 771                         module_put(newinfo->fbops->owner);
 772                 err = -ENODEV;
 773         }
 774
 775         if (!err) {
 776                 fbcon_del_cursor_timer(oldinfo);
 777                 kfree(ops->cursor_state.mask);
 778                 kfree(ops->cursor_data);
 779                 kfree(ops->fontbuffer);
 780                 kfree(oldinfo->fbcon_par);
 781                 oldinfo->fbcon_par = NULL;
 782                 module_put(oldinfo->fbops->owner);
 783                 /*
 784                   If oldinfo and newinfo are driving the same hardware,
 785                   the fb_release() method of oldinfo may attempt to
 786                   restore the hardware state.  This will leave the
 787                   newinfo in an undefined state. Thus, a call to
 788                   fb_set_par() may be needed for the newinfo.
 789                 */
 790                 if (newinfo->fbops->fb_set_par) {
 791                         ret = newinfo->fbops->fb_set_par(newinfo);
 792
 793                         if (ret)
 794                                 printk(KERN_ERR "con2fb_release_oldinfo: "
 795                                         "detected unhandled fb_set_par error, "
 796                                         "error code %d\n", ret);
 797                 }
 798         }
 799
 800         return err;
 801 }
 802
 803 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
 804                                 int unit, int show_logo)
 805 {
 806         struct fbcon_ops *ops = info->fbcon_par;
 807         int ret;
 808
 809         ops->currcon = fg_console;
 810
 811         if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT)) {
 812                 ret = info->fbops->fb_set_par(info);
 813
 814                 if (ret)
 815                         printk(KERN_ERR "con2fb_init_display: detected "
 816                                 "unhandled fb_set_par error, "
 817                                 "error code %d\n", ret);
 818         }
 819
 820         ops->flags |= FBCON_FLAGS_INIT;
 821         ops->graphics = 0;
 822         fbcon_set_disp(info, &info->var, unit);
 823
 824         if (show_logo) {
 825                 struct vc_data *fg_vc = vc_cons[fg_console].d;
 826                 struct fb_info *fg_info =
 827                         registered_fb[con2fb_map[fg_console]];
 828
 829                 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
 830                                    fg_vc->vc_rows, fg_vc->vc_cols,
 831                                    fg_vc->vc_rows);
 832         }
 833
 834         update_screen(vc_cons[fg_console].d);
 835 }
 836
 837 /**
 838  *      set_con2fb_map - map console to frame buffer device
 839  *      @unit: virtual console number to map
 840  *      @newidx: frame buffer index to map virtual console to
 841  *      @user: user request
 842  *
 843  *      Maps a virtual console @unit to a frame buffer device
 844  *      @newidx.
 845  */
 846 static int set_con2fb_map(int unit, int newidx, int user)
 847 {
 848         struct vc_data *vc = vc_cons[unit].d;
 849         int oldidx = con2fb_map[unit];
 850         struct fb_info *info = registered_fb[newidx];
 851         struct fb_info *oldinfo = NULL;
 852         int found, err = 0;
 853
 854         if (oldidx == newidx)
 855                 return 0;
 856
 857         if (!info)
 858                 return -EINVAL;
 859
 860         if (!search_for_mapped_con() || !con_is_bound(&fb_con)) {
 861                 info_idx = newidx;
 862                 return fbcon_takeover(0);
 863         }
 864
 865         if (oldidx != -1)
 866                 oldinfo = registered_fb[oldidx];
 867
 868         found = search_fb_in_map(newidx);
 869
 870         console_lock();
 871         con2fb_map[unit] = newidx;
 872         if (!err && !found)
 873                 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
 874
 875
 876         /*
 877          * If old fb is not mapped to any of the consoles,
 878          * fbcon should release it.
 879          */
 880         if (!err && oldinfo && !search_fb_in_map(oldidx))
 881                 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
 882                                              found);
 883
 884         if (!err) {
 885                 int show_logo = (fg_console == 0 && !user &&
 886                                  logo_shown != FBCON_LOGO_DONTSHOW);
 887
 888                 if (!found)
 889                         fbcon_add_cursor_timer(info);
 890                 con2fb_map_boot[unit] = newidx;
 891                 con2fb_init_display(vc, info, unit, show_logo);
 892         }
 893
 894         if (!search_fb_in_map(info_idx))
 895                 info_idx = newidx;
 896
 897         console_unlock();
 898         return err;
 899 }
 900
 901 /*
 902  *  Low Level Operations
 903  */
 904 /* NOTE: fbcon cannot be __init: it may be called from take_over_console later */
 905 static int var_to_display(struct display *disp,
 906                           struct fb_var_screeninfo *var,
 907                           struct fb_info *info)
 908 {
 909         disp->xres_virtual = var->xres_virtual;
 910         disp->yres_virtual = var->yres_virtual;
 911         disp->bits_per_pixel = var->bits_per_pixel;
 912         disp->grayscale = var->grayscale;
 913         disp->nonstd = var->nonstd;
 914         disp->accel_flags = var->accel_flags;
 915         disp->height = var->height;
 916         disp->width = var->width;
 917         disp->red = var->red;
 918         disp->green = var->green;
 919         disp->blue = var->blue;
 920         disp->transp = var->transp;
 921         disp->rotate = var->rotate;
 922         disp->mode = fb_match_mode(var, &info->modelist);
 923         if (disp->mode == NULL)
 924                 /* This should not happen */
 925                 return -EINVAL;
 926         return 0;
 927 }
 928
 929 static void display_to_var(struct fb_var_screeninfo *var,
 930                            struct display *disp)
 931 {
 932         fb_videomode_to_var(var, disp->mode);
 933         var->xres_virtual = disp->xres_virtual;
 934         var->yres_virtual = disp->yres_virtual;
 935         var->bits_per_pixel = disp->bits_per_pixel;
 936         var->grayscale = disp->grayscale;
 937         var->nonstd = disp->nonstd;
 938         var->accel_flags = disp->accel_flags;
 939         var->height = disp->height;
 940         var->width = disp->width;
 941         var->red = disp->red;
 942         var->green = disp->green;
 943         var->blue = disp->blue;
 944         var->transp = disp->transp;
 945         var->rotate = disp->rotate;
 946 }
 947
 948 static const char *fbcon_startup(void)
 949 {
 950         const char *display_desc = "frame buffer device";
 951         struct display *p = &fb_display[fg_console];
 952         struct vc_data *vc = vc_cons[fg_console].d;
 953         const struct font_desc *font = NULL;
 954         struct module *owner;
 955         struct fb_info *info = NULL;
 956         struct fbcon_ops *ops;
 957         int rows, cols;
 958
 959         /*
 960          *  If num_registered_fb is zero, this is a call for the dummy part.
 961          *  The frame buffer devices weren't initialized yet.
 962          */
 963         if (!num_registered_fb || info_idx == -1)
 964                 return display_desc;
 965         /*
 966          * Instead of blindly using registered_fb[0], we use info_idx, set by
 967          * fb_console_init();
 968          */
 969         info = registered_fb[info_idx];
 970         if (!info)
 971                 return NULL;
 972
 973         owner = info->fbops->owner;
 974         if (!try_module_get(owner))
 975                 return NULL;
 976         if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
 977                 module_put(owner);
 978                 return NULL;
 979         }
 980
 981         ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
 982         if (!ops) {
 983                 module_put(owner);
 984                 return NULL;
 985         }
 986
 987         ops->currcon = -1;
 988         ops->graphics = 1;
 989         ops->cur_rotate = -1;
 990         info->fbcon_par = ops;
 991         p->con_rotate = initial_rotation;
 992         set_blitting_type(vc, info);
 993
 994         if (info->fix.type != FB_TYPE_TEXT) {
 995                 if (fbcon_softback_size) {
 996                         if (!softback_buf) {
 997                                 softback_buf =
 998                                     (unsigned long)
 999                                     kmalloc(fbcon_softback_size,
1000                                             GFP_KERNEL);
1001                                 if (!softback_buf) {
1002                                         fbcon_softback_size = 0;
1003                                         softback_top = 0;
1004                                 }
1005                         }
1006                 } else {
1007                         if (softback_buf) {
1008                                 kfree((void *) softback_buf);
1009                                 softback_buf = 0;
1010                                 softback_top = 0;
1011                         }
1012                 }
1013                 if (softback_buf)
1014                         softback_in = softback_top = softback_curr =
1015                             softback_buf;
1016                 softback_lines = 0;
1017         }
1018
1019         /* Setup default font */
1020         if (!p->fontdata && !vc->vc_font.data) {
1021                 if (!fontname[0] || !(font = find_font(fontname)))
1022                         font = get_default_font(info->var.xres,
1023                                                 info->var.yres,
1024                                                 info->pixmap.blit_x,
1025                                                 info->pixmap.blit_y);
1026                 vc->vc_font.width = font->width;
1027                 vc->vc_font.height = font->height;
1028                 vc->vc_font.data = (void *)(p->fontdata = font->data);
1029                 vc->vc_font.charcount = 256; /* FIXME  Need to support more fonts */
1030         } else {
1031                 p->fontdata = vc->vc_font.data;
1032         }
1033
1034         cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1035         rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1036         cols /= vc->vc_font.width;
1037         rows /= vc->vc_font.height;
1038         vc_resize(vc, cols, rows);
1039
1040         DPRINTK("mode:   %s\n", info->fix.id);
1041         DPRINTK("visual: %d\n", info->fix.visual);
1042         DPRINTK("res:    %dx%d-%d\n", info->var.xres,
1043                 info->var.yres,
1044                 info->var.bits_per_pixel);
1045
1046         fbcon_add_cursor_timer(info);
1047         fbcon_has_exited = 0;
1048         return display_desc;
1049 }
1050
1051 static void fbcon_init(struct vc_data *vc, int init)
1052 {
1053         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1054         struct fbcon_ops *ops;
1055         struct vc_data **default_mode = vc->vc_display_fg;
1056         struct vc_data *svc = *default_mode;
1057         struct display *t, *p = &fb_display[vc->vc_num];
1058         int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
1059         int cap, ret;
1060
1061         if (info_idx == -1 || info == NULL)
1062             return;
1063
1064         cap = info->flags;
1065
1066         if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1067             (info->fix.type == FB_TYPE_TEXT))
1068                 logo = 0;
1069
1070         if (var_to_display(p, &info->var, info))
1071                 return;
1072
1073         if (!info->fbcon_par)
1074                 con2fb_acquire_newinfo(vc, info, vc->vc_num, -1);
1075
1076         /* If we are not the first console on this
1077            fb, copy the font from that console */
1078         t = &fb_display[fg_console];
1079         if (!p->fontdata) {
1080                 if (t->fontdata) {
1081                         struct vc_data *fvc = vc_cons[fg_console].d;
1082
1083                         vc->vc_font.data = (void *)(p->fontdata =
1084                                                     fvc->vc_font.data);
1085                         vc->vc_font.width = fvc->vc_font.width;
1086                         vc->vc_font.height = fvc->vc_font.height;
1087                         p->userfont = t->userfont;
1088
1089                         if (p->userfont)
1090                                 REFCOUNT(p->fontdata)++;
1091                 } else {
1092                         const struct font_desc *font = NULL;
1093
1094                         if (!fontname[0] || !(font = find_font(fontname)))
1095                                 font = get_default_font(info->var.xres,
1096                                                         info->var.yres,
1097                                                         info->pixmap.blit_x,
1098                                                         info->pixmap.blit_y);
1099                         vc->vc_font.width = font->width;
1100                         vc->vc_font.height = font->height;
1101                         vc->vc_font.data = (void *)(p->fontdata = font->data);
1102                         vc->vc_font.charcount = 256; /* FIXME  Need to
1103                                                         support more fonts */
1104                 }
1105         }
1106
1107         if (p->userfont)
1108                 charcnt = FNTCHARCNT(p->fontdata);
1109
1110         vc->vc_panic_force_write = !!(info->flags & FBINFO_CAN_FORCE_OUTPUT);
1111         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1112         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1113         if (charcnt == 256) {
1114                 vc->vc_hi_font_mask = 0;
1115         } else {
1116                 vc->vc_hi_font_mask = 0x100;
1117                 if (vc->vc_can_do_color)
1118                         vc->vc_complement_mask <<= 1;
1119         }
1120
1121         if (!*svc->vc_uni_pagedir_loc)
1122                 con_set_default_unimap(svc);
1123         if (!*vc->vc_uni_pagedir_loc)
1124                 con_copy_unimap(vc, svc);
1125
1126         ops = info->fbcon_par;
1127         p->con_rotate = initial_rotation;
1128         set_blitting_type(vc, info);
1129
1130         cols = vc->vc_cols;
1131         rows = vc->vc_rows;
1132         new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1133         new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1134         new_cols /= vc->vc_font.width;
1135         new_rows /= vc->vc_font.height;
1136
1137         /*
1138          * We must always set the mode. The mode of the previous console
1139          * driver could be in the same resolution but we are using different
1140          * hardware so we have to initialize the hardware.
1141          *
1142          * We need to do it in fbcon_init() to prevent screen corruption.
1143          */
1144         if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
1145                 if (info->fbops->fb_set_par &&
1146                     !(ops->flags & FBCON_FLAGS_INIT)) {
1147                         ret = info->fbops->fb_set_par(info);
1148
1149                         if (ret)
1150                                 printk(KERN_ERR "fbcon_init: detected "
1151                                         "unhandled fb_set_par error, "
1152                                         "error code %d\n", ret);
1153                 }
1154
1155                 ops->flags |= FBCON_FLAGS_INIT;
1156         }
1157
1158         ops->graphics = 0;
1159
1160         if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1161             !(cap & FBINFO_HWACCEL_DISABLED))
1162                 p->scrollmode = SCROLL_MOVE;
1163         else /* default to something safe */
1164                 p->scrollmode = SCROLL_REDRAW;
1165
1166         /*
1167          *  ++guenther: console.c:vc_allocate() relies on initializing
1168          *  vc_{cols,rows}, but we must not set those if we are only
1169          *  resizing the console.
1170          */
1171         if (init) {
1172                 vc->vc_cols = new_cols;
1173                 vc->vc_rows = new_rows;
1174         } else
1175                 vc_resize(vc, new_cols, new_rows);
1176
1177         if (logo)
1178                 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1179
1180         if (vc == svc && softback_buf)
1181                 fbcon_update_softback(vc);
1182
1183         if (ops->rotate_font && ops->rotate_font(info, vc)) {
1184                 ops->rotate = FB_ROTATE_UR;
1185                 set_blitting_type(vc, info);
1186         }
1187
1188         ops->p = &fb_display[fg_console];
1189 }
1190
1191 static void fbcon_free_font(struct display *p, bool freefont)
1192 {
1193         if (freefont && p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1194                 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1195         p->fontdata = NULL;
1196         p->userfont = 0;
1197 }
1198
1199 static void fbcon_deinit(struct vc_data *vc)
1200 {
1201         struct display *p = &fb_display[vc->vc_num];
1202         struct fb_info *info;
1203         struct fbcon_ops *ops;
1204         int idx;
1205         bool free_font = true;
1206
1207         idx = con2fb_map[vc->vc_num];
1208
1209         if (idx == -1)
1210                 goto finished;
1211
1212         info = registered_fb[idx];
1213
1214         if (!info)
1215                 goto finished;
1216
1217         if (info->flags & FBINFO_MISC_FIRMWARE)
1218                 free_font = false;
1219         ops = info->fbcon_par;
1220
1221         if (!ops)
1222                 goto finished;
1223
1224         if (CON_IS_VISIBLE(vc))
1225                 fbcon_del_cursor_timer(info);
1226
1227         ops->flags &= ~FBCON_FLAGS_INIT;
1228 finished:
1229
1230         fbcon_free_font(p, free_font);
1231
1232         if (!con_is_bound(&fb_con))
1233                 fbcon_exit();
1234
1235         return;
1236 }
1237
1238 /* ====================================================================== */
1239
1240 /*  fbcon_XXX routines - interface used by the world
1241  *
1242  *  This system is now divided into two levels because of complications
1243  *  caused by hardware scrolling. Top level functions:
1244  *
1245  *      fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1246  *
1247  *  handles y values in range [0, scr_height-1] that correspond to real
1248  *  screen positions. y_wrap shift means that first line of bitmap may be
1249  *  anywhere on this display. These functions convert lineoffsets to
1250  *  bitmap offsets and deal with the wrap-around case by splitting blits.
1251  *
1252  *      fbcon_bmove_physical_8()    -- These functions fast implementations
1253  *      fbcon_clear_physical_8()    -- of original fbcon_XXX fns.
1254  *      fbcon_putc_physical_8()     -- (font width != 8) may be added later
1255  *
1256  *  WARNING:
1257  *
1258  *  At the moment fbcon_putc() cannot blit across vertical wrap boundary
1259  *  Implies should only really hardware scroll in rows. Only reason for
1260  *  restriction is simplicity & efficiency at the moment.
1261  */
1262
1263 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1264                         int width)
1265 {
1266         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1267         struct fbcon_ops *ops = info->fbcon_par;
1268
1269         struct display *p = &fb_display[vc->vc_num];
1270         u_int y_break;
1271
1272         if (fbcon_is_inactive(vc, info))
1273                 return;
1274
1275         if (!height || !width)
1276                 return;
1277
1278         if (sy < vc->vc_top && vc->vc_top == logo_lines)
1279                 vc->vc_top = 0;
1280
1281         /* Split blits that cross physical y_wrap boundary */
1282
1283         y_break = p->vrows - p->yscroll;
1284         if (sy < y_break && sy + height - 1 >= y_break) {
1285                 u_int b = y_break - sy;
1286                 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1287                 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1288                                  width);
1289         } else
1290                 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1291 }
1292
1293 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1294                         int count, int ypos, int xpos)
1295 {
1296         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1297         struct display *p = &fb_display[vc->vc_num];
1298         struct fbcon_ops *ops = info->fbcon_par;
1299
1300         if (!fbcon_is_inactive(vc, info))
1301                 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1302                            get_color(vc, info, scr_readw(s), 1),
1303                            get_color(vc, info, scr_readw(s), 0));
1304 }
1305
1306 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1307 {
1308         unsigned short chr;
1309
1310         scr_writew(c, &chr);
1311         fbcon_putcs(vc, &chr, 1, ypos, xpos);
1312 }
1313
1314 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1315 {
1316         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1317         struct fbcon_ops *ops = info->fbcon_par;
1318
1319         if (!fbcon_is_inactive(vc, info))
1320                 ops->clear_margins(vc, info, bottom_only);
1321 }
1322
1323 static void fbcon_cursor(struct vc_data *vc, int mode)
1324 {
1325         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1326         struct fbcon_ops *ops = info->fbcon_par;
1327         int y;
1328         int c = scr_readw((u16 *) vc->vc_pos);
1329
1330         if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
1331                 return;
1332
1333         if (vc->vc_cursor_type & 0x10)
1334                 fbcon_del_cursor_timer(info);
1335         else
1336                 fbcon_add_cursor_timer(info);
1337
1338         ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1339         if (mode & CM_SOFTBACK) {
1340                 mode &= ~CM_SOFTBACK;
1341                 y = softback_lines;
1342         } else {
1343                 if (softback_lines)
1344                         fbcon_set_origin(vc);
1345                 y = 0;
1346         }
1347
1348         ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
1349                     get_color(vc, info, c, 0));
1350         vbl_cursor_cnt = CURSOR_DRAW_DELAY;
1351 }
1352
1353 static int scrollback_phys_max = 0;
1354 static int scrollback_max = 0;
1355 static int scrollback_current = 0;
1356
1357 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1358                            int unit)
1359 {
1360         struct display *p, *t;
1361         struct vc_data **default_mode, *vc;
1362         struct vc_data *svc;
1363         struct fbcon_ops *ops = info->fbcon_par;
1364         int rows, cols, charcnt = 256;
1365
1366         p = &fb_display[unit];
1367
1368         if (var_to_display(p, var, info))
1369                 return;
1370
1371         vc = vc_cons[unit].d;
1372
1373         if (!vc)
1374                 return;
1375
1376         default_mode = vc->vc_display_fg;
1377         svc = *default_mode;
1378         t = &fb_display[svc->vc_num];
1379
1380         if (!vc->vc_font.data) {
1381                 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1382                 vc->vc_font.width = (*default_mode)->vc_font.width;
1383                 vc->vc_font.height = (*default_mode)->vc_font.height;
1384                 p->userfont = t->userfont;
1385                 if (p->userfont)
1386                         REFCOUNT(p->fontdata)++;
1387         }
1388         if (p->userfont)
1389                 charcnt = FNTCHARCNT(p->fontdata);
1390
1391         var->activate = FB_ACTIVATE_NOW;
1392         info->var.activate = var->activate;
1393         var->yoffset = info->var.yoffset;
1394         var->xoffset = info->var.xoffset;
1395         fb_set_var(info, var);
1396         ops->var = info->var;
1397         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1398         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1399         if (charcnt == 256) {
1400                 vc->vc_hi_font_mask = 0;
1401         } else {
1402                 vc->vc_hi_font_mask = 0x100;
1403                 if (vc->vc_can_do_color)
1404                         vc->vc_complement_mask <<= 1;
1405         }
1406
1407         if (!*svc->vc_uni_pagedir_loc)
1408                 con_set_default_unimap(svc);
1409         if (!*vc->vc_uni_pagedir_loc)
1410                 con_copy_unimap(vc, svc);
1411
1412         cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1413         rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1414         cols /= vc->vc_font.width;
1415         rows /= vc->vc_font.height;
1416         vc_resize(vc, cols, rows);
1417
1418         if (CON_IS_VISIBLE(vc)) {
1419                 update_screen(vc);
1420                 if (softback_buf)
1421                         fbcon_update_softback(vc);
1422         }
1423 }
1424
1425 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1426 {
1427         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1428         struct fbcon_ops *ops = info->fbcon_par;
1429         struct display *p = &fb_display[vc->vc_num];
1430
1431         p->yscroll += count;
1432         if (p->yscroll >= p->vrows)     /* Deal with wrap */
1433                 p->yscroll -= p->vrows;
1434         ops->var.xoffset = 0;
1435         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1436         ops->var.vmode |= FB_VMODE_YWRAP;
1437         ops->update_start(info);
1438         scrollback_max += count;
1439         if (scrollback_max > scrollback_phys_max)
1440                 scrollback_max = scrollback_phys_max;
1441         scrollback_current = 0;
1442 }
1443
1444 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1445 {
1446         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1447         struct fbcon_ops *ops = info->fbcon_par;
1448         struct display *p = &fb_display[vc->vc_num];
1449
1450         p->yscroll -= count;
1451         if (p->yscroll < 0)     /* Deal with wrap */
1452                 p->yscroll += p->vrows;
1453         ops->var.xoffset = 0;
1454         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1455         ops->var.vmode |= FB_VMODE_YWRAP;
1456         ops->update_start(info);
1457         scrollback_max -= count;
1458         if (scrollback_max < 0)
1459                 scrollback_max = 0;
1460         scrollback_current = 0;
1461 }
1462
1463 static __inline__ void ypan_up(struct vc_data *vc, int count)
1464 {
1465         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1466         struct display *p = &fb_display[vc->vc_num];
1467         struct fbcon_ops *ops = info->fbcon_par;
1468
1469         p->yscroll += count;
1470         if (p->yscroll > p->vrows - vc->vc_rows) {
1471                 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1472                             0, 0, 0, vc->vc_rows, vc->vc_cols);
1473                 p->yscroll -= p->vrows - vc->vc_rows;
1474         }
1475
1476         ops->var.xoffset = 0;
1477         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1478         ops->var.vmode &= ~FB_VMODE_YWRAP;
1479         ops->update_start(info);
1480         fbcon_clear_margins(vc, 1);
1481         scrollback_max += count;
1482         if (scrollback_max > scrollback_phys_max)
1483                 scrollback_max = scrollback_phys_max;
1484         scrollback_current = 0;
1485 }
1486
1487 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1488 {
1489         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1490         struct fbcon_ops *ops = info->fbcon_par;
1491         struct display *p = &fb_display[vc->vc_num];
1492
1493         p->yscroll += count;
1494
1495         if (p->yscroll > p->vrows - vc->vc_rows) {
1496                 p->yscroll -= p->vrows - vc->vc_rows;
1497                 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1498         }
1499
1500         ops->var.xoffset = 0;
1501         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1502         ops->var.vmode &= ~FB_VMODE_YWRAP;
1503         ops->update_start(info);
1504         fbcon_clear_margins(vc, 1);
1505         scrollback_max += count;
1506         if (scrollback_max > scrollback_phys_max)
1507                 scrollback_max = scrollback_phys_max;
1508         scrollback_current = 0;
1509 }
1510
1511 static __inline__ void ypan_down(struct vc_data *vc, int count)
1512 {
1513         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1514         struct display *p = &fb_display[vc->vc_num];
1515         struct fbcon_ops *ops = info->fbcon_par;
1516
1517         p->yscroll -= count;
1518         if (p->yscroll < 0) {
1519                 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1520                             0, vc->vc_rows, vc->vc_cols);
1521                 p->yscroll += p->vrows - vc->vc_rows;
1522         }
1523
1524         ops->var.xoffset = 0;
1525         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1526         ops->var.vmode &= ~FB_VMODE_YWRAP;
1527         ops->update_start(info);
1528         fbcon_clear_margins(vc, 1);
1529         scrollback_max -= count;
1530         if (scrollback_max < 0)
1531                 scrollback_max = 0;
1532         scrollback_current = 0;
1533 }
1534
1535 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1536 {
1537         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1538         struct fbcon_ops *ops = info->fbcon_par;
1539         struct display *p = &fb_display[vc->vc_num];
1540
1541         p->yscroll -= count;
1542
1543         if (p->yscroll < 0) {
1544                 p->yscroll += p->vrows - vc->vc_rows;
1545                 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1546         }
1547
1548         ops->var.xoffset = 0;
1549         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1550         ops->var.vmode &= ~FB_VMODE_YWRAP;
1551         ops->update_start(info);
1552         fbcon_clear_margins(vc, 1);
1553         scrollback_max -= count;
1554         if (scrollback_max < 0)
1555                 scrollback_max = 0;
1556         scrollback_current = 0;
1557 }
1558
1559 static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1560                                   long delta)
1561 {
1562         int count = vc->vc_rows;
1563         unsigned short *d, *s;
1564         unsigned long n;
1565         int line = 0;
1566
1567         d = (u16 *) softback_curr;
1568         if (d == (u16 *) softback_in)
1569                 d = (u16 *) vc->vc_origin;
1570         n = softback_curr + delta * vc->vc_size_row;
1571         softback_lines -= delta;
1572         if (delta < 0) {
1573                 if (softback_curr < softback_top && n < softback_buf) {
1574                         n += softback_end - softback_buf;
1575                         if (n < softback_top) {
1576                                 softback_lines -=
1577                                     (softback_top - n) / vc->vc_size_row;
1578                                 n = softback_top;
1579                         }
1580                 } else if (softback_curr >= softback_top
1581                            && n < softback_top) {
1582                         softback_lines -=
1583                             (softback_top - n) / vc->vc_size_row;
1584                         n = softback_top;
1585                 }
1586         } else {
1587                 if (softback_curr > softback_in && n >= softback_end) {
1588                         n += softback_buf - softback_end;
1589                         if (n > softback_in) {
1590                                 n = softback_in;
1591                                 softback_lines = 0;
1592                         }
1593                 } else if (softback_curr <= softback_in && n > softback_in) {
1594                         n = softback_in;
1595                         softback_lines = 0;
1596                 }
1597         }
1598         if (n == softback_curr)
1599                 return;
1600         softback_curr = n;
1601         s = (u16 *) softback_curr;
1602         if (s == (u16 *) softback_in)
1603                 s = (u16 *) vc->vc_origin;
1604         while (count--) {
1605                 unsigned short *start;
1606                 unsigned short *le;
1607                 unsigned short c;
1608                 int x = 0;
1609                 unsigned short attr = 1;
1610
1611                 start = s;
1612                 le = advance_row(s, 1);
1613                 do {
1614                         c = scr_readw(s);
1615                         if (attr != (c & 0xff00)) {
1616                                 attr = c & 0xff00;
1617                                 if (s > start) {
1618                                         fbcon_putcs(vc, start, s - start,
1619                                                     line, x);
1620                                         x += s - start;
1621                                         start = s;
1622                                 }
1623                         }
1624                         if (c == scr_readw(d)) {
1625                                 if (s > start) {
1626                                         fbcon_putcs(vc, start, s - start,
1627                                                     line, x);
1628                                         x += s - start + 1;
1629                                         start = s + 1;
1630                                 } else {
1631                                         x++;
1632                                         start++;
1633                                 }
1634                         }
1635                         s++;
1636                         d++;
1637                 } while (s < le);
1638                 if (s > start)
1639                         fbcon_putcs(vc, start, s - start, line, x);
1640                 line++;
1641                 if (d == (u16 *) softback_end)
1642                         d = (u16 *) softback_buf;
1643                 if (d == (u16 *) softback_in)
1644                         d = (u16 *) vc->vc_origin;
1645                 if (s == (u16 *) softback_end)
1646                         s = (u16 *) softback_buf;
1647                 if (s == (u16 *) softback_in)
1648                         s = (u16 *) vc->vc_origin;
1649         }
1650 }
1651
1652 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1653                               int line, int count, int dy)
1654 {
1655         unsigned short *s = (unsigned short *)
1656                 (vc->vc_origin + vc->vc_size_row * line);
1657
1658         while (count--) {
1659                 unsigned short *start = s;
1660                 unsigned short *le = advance_row(s, 1);
1661                 unsigned short c;
1662                 int x = 0;
1663                 unsigned short attr = 1;
1664
1665                 do {
1666                         c = scr_readw(s);
1667                         if (attr != (c & 0xff00)) {
1668                                 attr = c & 0xff00;
1669                                 if (s > start) {
1670                                         fbcon_putcs(vc, start, s - start,
1671                                                     dy, x);
1672                                         x += s - start;
1673                                         start = s;
1674                                 }
1675                         }
1676                         console_conditional_schedule();
1677                         s++;
1678                 } while (s < le);
1679                 if (s > start)
1680                         fbcon_putcs(vc, start, s - start, dy, x);
1681                 console_conditional_schedule();
1682                 dy++;
1683         }
1684 }
1685
1686 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
1687                         struct display *p, int line, int count, int ycount)
1688 {
1689         int offset = ycount * vc->vc_cols;
1690         unsigned short *d = (unsigned short *)
1691             (vc->vc_origin + vc->vc_size_row * line);
1692         unsigned short *s = d + offset;
1693         struct fbcon_ops *ops = info->fbcon_par;
1694
1695         while (count--) {
1696                 unsigned short *start = s;
1697                 unsigned short *le = advance_row(s, 1);
1698                 unsigned short c;
1699                 int x = 0;
1700
1701                 do {
1702                         c = scr_readw(s);
1703
1704                         if (c == scr_readw(d)) {
1705                                 if (s > start) {
1706                                         ops->bmove(vc, info, line + ycount, x,
1707                                                    line, x, 1, s-start);
1708                                         x += s - start + 1;
1709                                         start = s + 1;
1710                                 } else {
1711                                         x++;
1712                                         start++;
1713                                 }
1714                         }
1715
1716                         scr_writew(c, d);
1717                         console_conditional_schedule();
1718                         s++;
1719                         d++;
1720                 } while (s < le);
1721                 if (s > start)
1722                         ops->bmove(vc, info, line + ycount, x, line, x, 1,
1723                                    s-start);
1724                 console_conditional_schedule();
1725                 if (ycount > 0)
1726                         line++;
1727                 else {
1728                         line--;
1729                         /* NOTE: We subtract two lines from these pointers */
1730                         s -= vc->vc_size_row;
1731                         d -= vc->vc_size_row;
1732                 }
1733         }
1734 }
1735
1736 static void fbcon_redraw(struct vc_data *vc, struct display *p,
1737                          int line, int count, int offset)
1738 {
1739         unsigned short *d = (unsigned short *)
1740             (vc->vc_origin + vc->vc_size_row * line);
1741         unsigned short *s = d + offset;
1742
1743         while (count--) {
1744                 unsigned short *start = s;
1745                 unsigned short *le = advance_row(s, 1);
1746                 unsigned short c;
1747                 int x = 0;
1748                 unsigned short attr = 1;
1749
1750                 do {
1751                         c = scr_readw(s);
1752                         if (attr != (c & 0xff00)) {
1753                                 attr = c & 0xff00;
1754                                 if (s > start) {
1755                                         fbcon_putcs(vc, start, s - start,
1756                                                     line, x);
1757                                         x += s - start;
1758                                         start = s;
1759                                 }
1760                         }
1761                         if (c == scr_readw(d)) {
1762                                 if (s > start) {
1763                                         fbcon_putcs(vc, start, s - start,
1764                                                      line, x);
1765                                         x += s - start + 1;
1766                                         start = s + 1;
1767                                 } else {
1768                                         x++;
1769                                         start++;
1770                                 }
1771                         }
1772                         scr_writew(c, d);
1773                         console_conditional_schedule();
1774                         s++;
1775                         d++;
1776                 } while (s < le);
1777                 if (s > start)
1778                         fbcon_putcs(vc, start, s - start, line, x);
1779                 console_conditional_schedule();
1780                 if (offset > 0)
1781                         line++;
1782                 else {
1783                         line--;
1784                         /* NOTE: We subtract two lines from these pointers */
1785                         s -= vc->vc_size_row;
1786                         d -= vc->vc_size_row;
1787                 }
1788         }
1789 }
1790
1791 static inline void fbcon_softback_note(struct vc_data *vc, int t,
1792                                        int count)
1793 {
1794         unsigned short *p;
1795
1796         if (vc->vc_num != fg_console)
1797                 return;
1798         p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1799
1800         while (count) {
1801                 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1802                 count--;
1803                 p = advance_row(p, 1);
1804                 softback_in += vc->vc_size_row;
1805                 if (softback_in == softback_end)
1806                         softback_in = softback_buf;
1807                 if (softback_in == softback_top) {
1808                         softback_top += vc->vc_size_row;
1809                         if (softback_top == softback_end)
1810                                 softback_top = softback_buf;
1811                 }
1812         }
1813         softback_curr = softback_in;
1814 }
1815
1816 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
1817                         int count)
1818 {
1819         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1820         struct display *p = &fb_display[vc->vc_num];
1821         int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1822
1823         if (fbcon_is_inactive(vc, info))
1824                 return -EINVAL;
1825
1826         fbcon_cursor(vc, CM_ERASE);
1827
1828         /*
1829          * ++Geert: Only use ywrap/ypan if the console is in text mode
1830          * ++Andrew: Only use ypan on hardware text mode when scrolling the
1831          *           whole screen (prevents flicker).
1832          */
1833
1834         switch (dir) {
1835         case SM_UP:
1836                 if (count > vc->vc_rows)        /* Maximum realistic size */
1837                         count = vc->vc_rows;
1838                 if (softback_top)
1839                         fbcon_softback_note(vc, t, count);
1840                 if (logo_shown >= 0)
1841                         goto redraw_up;
1842                 switch (p->scrollmode) {
1843                 case SCROLL_MOVE:
1844                         fbcon_redraw_blit(vc, info, p, t, b - t - count,
1845                                      count);
1846                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1847                         scr_memsetw((unsigned short *) (vc->vc_origin +
1848                                                         vc->vc_size_row *
1849                                                         (b - count)),
1850                                     vc->vc_video_erase_char,
1851                                     vc->vc_size_row * count);
1852                         return 1;
1853                         break;
1854
1855                 case SCROLL_WRAP_MOVE:
1856                         if (b - t - count > 3 * vc->vc_rows >> 2) {
1857                                 if (t > 0)
1858                                         fbcon_bmove(vc, 0, 0, count, 0, t,
1859                                                     vc->vc_cols);
1860                                 ywrap_up(vc, count);
1861                                 if (vc->vc_rows - b > 0)
1862                                         fbcon_bmove(vc, b - count, 0, b, 0,
1863                                                     vc->vc_rows - b,
1864                                                     vc->vc_cols);
1865                         } else if (info->flags & FBINFO_READS_FAST)
1866                                 fbcon_bmove(vc, t + count, 0, t, 0,
1867                                             b - t - count, vc->vc_cols);
1868                         else
1869                                 goto redraw_up;
1870                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1871                         break;
1872
1873                 case SCROLL_PAN_REDRAW:
1874                         if ((p->yscroll + count <=
1875                              2 * (p->vrows - vc->vc_rows))
1876                             && ((!scroll_partial && (b - t == vc->vc_rows))
1877                                 || (scroll_partial
1878                                     && (b - t - count >
1879                                         3 * vc->vc_rows >> 2)))) {
1880                                 if (t > 0)
1881                                         fbcon_redraw_move(vc, p, 0, t, count);
1882                                 ypan_up_redraw(vc, t, count);
1883                                 if (vc->vc_rows - b > 0)
1884                                         fbcon_redraw_move(vc, p, b,
1885                                                           vc->vc_rows - b, b);
1886                         } else
1887                                 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1888                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1889                         break;
1890
1891                 case SCROLL_PAN_MOVE:
1892                         if ((p->yscroll + count <=
1893                              2 * (p->vrows - vc->vc_rows))
1894                             && ((!scroll_partial && (b - t == vc->vc_rows))
1895                                 || (scroll_partial
1896                                     && (b - t - count >
1897                                         3 * vc->vc_rows >> 2)))) {
1898                                 if (t > 0)
1899                                         fbcon_bmove(vc, 0, 0, count, 0, t,
1900                                                     vc->vc_cols);
1901                                 ypan_up(vc, count);
1902                                 if (vc->vc_rows - b > 0)
1903                                         fbcon_bmove(vc, b - count, 0, b, 0,
1904                                                     vc->vc_rows - b,
1905                                                     vc->vc_cols);
1906                         } else if (info->flags & FBINFO_READS_FAST)
1907                                 fbcon_bmove(vc, t + count, 0, t, 0,
1908                                             b - t - count, vc->vc_cols);
1909                         else
1910                                 goto redraw_up;
1911                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1912                         break;
1913
1914                 case SCROLL_REDRAW:
1915                       redraw_up:
1916                         fbcon_redraw(vc, p, t, b - t - count,
1917                                      count * vc->vc_cols);
1918                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1919                         scr_memsetw((unsigned short *) (vc->vc_origin +
1920                                                         vc->vc_size_row *
1921                                                         (b - count)),
1922                                     vc->vc_video_erase_char,
1923                                     vc->vc_size_row * count);
1924                         return 1;
1925                 }
1926                 break;
1927
1928         case SM_DOWN:
1929                 if (count > vc->vc_rows)        /* Maximum realistic size */
1930                         count = vc->vc_rows;
1931                 if (logo_shown >= 0)
1932                         goto redraw_down;
1933                 switch (p->scrollmode) {
1934                 case SCROLL_MOVE:
1935                         fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,
1936                                      -count);
1937                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1938                         scr_memsetw((unsigned short *) (vc->vc_origin +
1939                                                         vc->vc_size_row *
1940                                                         t),
1941                                     vc->vc_video_erase_char,
1942                                     vc->vc_size_row * count);
1943                         return 1;
1944                         break;
1945
1946                 case SCROLL_WRAP_MOVE:
1947                         if (b - t - count > 3 * vc->vc_rows >> 2) {
1948                                 if (vc->vc_rows - b > 0)
1949                                         fbcon_bmove(vc, b, 0, b - count, 0,
1950                                                     vc->vc_rows - b,
1951                                                     vc->vc_cols);
1952                                 ywrap_down(vc, count);
1953                                 if (t > 0)
1954                                         fbcon_bmove(vc, count, 0, 0, 0, t,
1955                                                     vc->vc_cols);
1956                         } else if (info->flags & FBINFO_READS_FAST)
1957                                 fbcon_bmove(vc, t, 0, t + count, 0,
1958                                             b - t - count, vc->vc_cols);
1959                         else
1960                                 goto redraw_down;
1961                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1962                         break;
1963
1964                 case SCROLL_PAN_MOVE:
1965                         if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1966                             && ((!scroll_partial && (b - t == vc->vc_rows))
1967                                 || (scroll_partial
1968                                     && (b - t - count >
1969                                         3 * vc->vc_rows >> 2)))) {
1970                                 if (vc->vc_rows - b > 0)
1971                                         fbcon_bmove(vc, b, 0, b - count, 0,
1972                                                     vc->vc_rows - b,
1973                                                     vc->vc_cols);
1974                                 ypan_down(vc, count);
1975                                 if (t > 0)
1976                                         fbcon_bmove(vc, count, 0, 0, 0, t,
1977                                                     vc->vc_cols);
1978                         } else if (info->flags & FBINFO_READS_FAST)
1979                                 fbcon_bmove(vc, t, 0, t + count, 0,
1980                                             b - t - count, vc->vc_cols);
1981                         else
1982                                 goto redraw_down;
1983                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1984                         break;
1985
1986                 case SCROLL_PAN_REDRAW:
1987                         if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1988                             && ((!scroll_partial && (b - t == vc->vc_rows))
1989                                 || (scroll_partial
1990                                     && (b - t - count >
1991                                         3 * vc->vc_rows >> 2)))) {
1992                                 if (vc->vc_rows - b > 0)
1993                                         fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
1994                                                           b - count);
1995                                 ypan_down_redraw(vc, t, count);
1996                                 if (t > 0)
1997                                         fbcon_redraw_move(vc, p, count, t, 0);
1998                         } else
1999                                 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
2000                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
2001                         break;
2002
2003                 case SCROLL_REDRAW:
2004                       redraw_down:
2005                         fbcon_redraw(vc, p, b - 1, b - t - count,
2006                                      -count * vc->vc_cols);
2007                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
2008                         scr_memsetw((unsigned short *) (vc->vc_origin +
2009                                                         vc->vc_size_row *
2010                                                         t),
2011                                     vc->vc_video_erase_char,
2012                                     vc->vc_size_row * count);
2013                         return 1;
2014                 }
2015         }
2016         return 0;
2017 }
2018
2019
2020 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
2021                         int height, int width)
2022 {
2023         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2024         struct display *p = &fb_display[vc->vc_num];
2025
2026         if (fbcon_is_inactive(vc, info))
2027                 return;
2028
2029         if (!width || !height)
2030                 return;
2031
2032         /*  Split blits that cross physical y_wrap case.
2033          *  Pathological case involves 4 blits, better to use recursive
2034          *  code rather than unrolled case
2035          *
2036          *  Recursive invocations don't need to erase the cursor over and
2037          *  over again, so we use fbcon_bmove_rec()
2038          */
2039         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
2040                         p->vrows - p->yscroll);
2041 }
2042
2043 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
2044                             int dy, int dx, int height, int width, u_int y_break)
2045 {
2046         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2047         struct fbcon_ops *ops = info->fbcon_par;
2048         u_int b;
2049
2050         if (sy < y_break && sy + height > y_break) {
2051                 b = y_break - sy;
2052                 if (dy < sy) {  /* Avoid trashing self */
2053                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2054                                         y_break);
2055                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2056                                         height - b, width, y_break);
2057                 } else {
2058                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2059                                         height - b, width, y_break);
2060                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2061                                         y_break);
2062                 }
2063                 return;
2064         }
2065
2066         if (dy < y_break && dy + height > y_break) {
2067                 b = y_break - dy;
2068                 if (dy < sy) {  /* Avoid trashing self */
2069                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2070                                         y_break);
2071                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2072                                         height - b, width, y_break);
2073                 } else {
2074                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2075                                         height - b, width, y_break);
2076                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2077                                         y_break);
2078                 }
2079                 return;
2080         }
2081         ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
2082                    height, width);
2083 }
2084
2085 static void updatescrollmode(struct display *p,
2086                                         struct fb_info *info,
2087                                         struct vc_data *vc)
2088 {
2089         struct fbcon_ops *ops = info->fbcon_par;
2090         int fh = vc->vc_font.height;
2091         int cap = info->flags;
2092         u16 t = 0;
2093         int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
2094                                   info->fix.xpanstep);
2095         int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
2096         int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2097         int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
2098                                    info->var.xres_virtual);
2099         int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
2100                 divides(ypan, vc->vc_font.height) && vyres > yres;
2101         int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
2102                 divides(ywrap, vc->vc_font.height) &&
2103                 divides(vc->vc_font.height, vyres) &&
2104                 divides(vc->vc_font.height, yres);
2105         int reading_fast = cap & FBINFO_READS_FAST;
2106         int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
2107                 !(cap & FBINFO_HWACCEL_DISABLED);
2108         int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
2109                 !(cap & FBINFO_HWACCEL_DISABLED);
2110
2111         p->vrows = vyres/fh;
2112         if (yres > (fh * (vc->vc_rows + 1)))
2113                 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2114         if ((yres % fh) && (vyres % fh < yres % fh))
2115                 p->vrows--;
2116
2117         if (good_wrap || good_pan) {
2118                 if (reading_fast || fast_copyarea)
2119                         p->scrollmode = good_wrap ?
2120                                 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
2121                 else
2122                         p->scrollmode = good_wrap ? SCROLL_REDRAW :
2123                                 SCROLL_PAN_REDRAW;
2124         } else {
2125                 if (reading_fast || (fast_copyarea && !fast_imageblit))
2126                         p->scrollmode = SCROLL_MOVE;
2127                 else
2128                         p->scrollmode = SCROLL_REDRAW;
2129         }
2130 }
2131
2132 static int fbcon_resize(struct vc_data *vc, unsigned int width,
2133                         unsigned int height, unsigned int user)
2134 {
2135         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2136         struct fbcon_ops *ops = info->fbcon_par;
2137         struct display *p = &fb_display[vc->vc_num];
2138         struct fb_var_screeninfo var = info->var;
2139         int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2140
2141         virt_w = FBCON_SWAP(ops->rotate, width, height);
2142         virt_h = FBCON_SWAP(ops->rotate, height, width);
2143         virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2144                                  vc->vc_font.height);
2145         virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2146                                  vc->vc_font.width);
2147         var.xres = virt_w * virt_fw;
2148         var.yres = virt_h * virt_fh;
2149         x_diff = info->var.xres - var.xres;
2150         y_diff = info->var.yres - var.yres;
2151         if (x_diff < 0 || x_diff > virt_fw ||
2152             y_diff < 0 || y_diff > virt_fh) {
2153                 const struct fb_videomode *mode;
2154
2155                 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2156                 mode = fb_find_best_mode(&var, &info->modelist);
2157                 if (mode == NULL)
2158                         return -EINVAL;
2159                 display_to_var(&var, p);
2160                 fb_videomode_to_var(&var, mode);
2161
2162                 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2163                         return -EINVAL;
2164
2165                 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2166                 if (CON_IS_VISIBLE(vc)) {
2167                         var.activate = FB_ACTIVATE_NOW |
2168                                 FB_ACTIVATE_FORCE;
2169                         fb_set_var(info, &var);
2170                 }
2171                 var_to_display(p, &info->var, info);
2172                 ops->var = info->var;
2173         }
2174         updatescrollmode(p, info, vc);
2175         return 0;
2176 }
2177
2178 static int fbcon_switch(struct vc_data *vc)
2179 {
2180         struct fb_info *info, *old_info = NULL;
2181         struct fbcon_ops *ops;
2182         struct display *p = &fb_display[vc->vc_num];
2183         struct fb_var_screeninfo var;
2184         int i, ret, prev_console, charcnt = 256;
2185
2186         info = registered_fb[con2fb_map[vc->vc_num]];
2187         ops = info->fbcon_par;
2188
2189         if (softback_top) {
2190                 if (softback_lines)
2191                         fbcon_set_origin(vc);
2192                 softback_top = softback_curr = softback_in = softback_buf;
2193                 softback_lines = 0;
2194                 fbcon_update_softback(vc);
2195         }
2196
2197         if (logo_shown >= 0) {
2198                 struct vc_data *conp2 = vc_cons[logo_shown].d;
2199
2200                 if (conp2->vc_top == logo_lines
2201                     && conp2->vc_bottom == conp2->vc_rows)
2202                         conp2->vc_top = 0;
2203                 logo_shown = FBCON_LOGO_CANSHOW;
2204         }
2205
2206         prev_console = ops->currcon;
2207         if (prev_console != -1)
2208                 old_info = registered_fb[con2fb_map[prev_console]];
2209         /*
2210          * FIXME: If we have multiple fbdev's loaded, we need to
2211          * update all info->currcon.  Perhaps, we can place this
2212          * in a centralized structure, but this might break some
2213          * drivers.
2214          *
2215          * info->currcon = vc->vc_num;
2216          */
2217         for (i = 0; i < FB_MAX; i++) {
2218                 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
2219                         struct fbcon_ops *o = registered_fb[i]->fbcon_par;
2220
2221                         o->currcon = vc->vc_num;
2222                 }
2223         }
2224         memset(&var, 0, sizeof(struct fb_var_screeninfo));
2225         display_to_var(&var, p);
2226         var.activate = FB_ACTIVATE_NOW;
2227
2228         /*
2229          * make sure we don't unnecessarily trip the memcmp()
2230          * in fb_set_var()
2231          */
2232         info->var.activate = var.activate;
2233         var.vmode |= info->var.vmode & ~FB_VMODE_MASK;
2234         fb_set_var(info, &var);
2235         ops->var = info->var;
2236
2237         if (old_info != NULL && (old_info != info ||
2238                                  info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2239                 if (info->fbops->fb_set_par) {
2240                         ret = info->fbops->fb_set_par(info);
2241
2242                         if (ret)
2243                                 printk(KERN_ERR "fbcon_switch: detected "
2244                                         "unhandled fb_set_par error, "
2245                                         "error code %d\n", ret);
2246                 }
2247
2248                 if (old_info != info)
2249                         fbcon_del_cursor_timer(old_info);
2250         }
2251
2252         if (fbcon_is_inactive(vc, info) ||
2253             ops->blank_state != FB_BLANK_UNBLANK)
2254                 fbcon_del_cursor_timer(info);
2255         else
2256                 fbcon_add_cursor_timer(info);
2257
2258         set_blitting_type(vc, info);
2259         ops->cursor_reset = 1;
2260
2261         if (ops->rotate_font && ops->rotate_font(info, vc)) {
2262                 ops->rotate = FB_ROTATE_UR;
2263                 set_blitting_type(vc, info);
2264         }
2265
2266         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2267         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2268
2269         if (p->userfont)
2270                 charcnt = FNTCHARCNT(vc->vc_font.data);
2271
2272         if (charcnt > 256)
2273                 vc->vc_complement_mask <<= 1;
2274
2275         updatescrollmode(p, info, vc);
2276
2277         switch (p->scrollmode) {
2278         case SCROLL_WRAP_MOVE:
2279                 scrollback_phys_max = p->vrows - vc->vc_rows;
2280                 break;
2281         case SCROLL_PAN_MOVE:
2282         case SCROLL_PAN_REDRAW:
2283                 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2284                 if (scrollback_phys_max < 0)
2285                         scrollback_phys_max = 0;
2286                 break;
2287         default:
2288                 scrollback_phys_max = 0;
2289                 break;
2290         }
2291
2292         scrollback_max = 0;
2293         scrollback_current = 0;
2294
2295         if (!fbcon_is_inactive(vc, info)) {
2296             ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2297             ops->update_start(info);
2298         }
2299
2300         fbcon_set_palette(vc, color_table);
2301         fbcon_clear_margins(vc, 0);
2302
2303         if (logo_shown == FBCON_LOGO_DRAW) {
2304
2305                 logo_shown = fg_console;
2306                 /* This is protected above by initmem_freed */
2307                 fb_show_logo(info, ops->rotate);
2308                 update_region(vc,
2309                               vc->vc_origin + vc->vc_size_row * vc->vc_top,
2310                               vc->vc_size_row * (vc->vc_bottom -
2311                                                  vc->vc_top) / 2);
2312                 return 0;
2313         }
2314         return 1;
2315 }
2316
2317 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2318                                 int blank)
2319 {
2320         struct fb_event event;
2321
2322         if (blank) {
2323                 unsigned short charmask = vc->vc_hi_font_mask ?
2324                         0x1ff : 0xff;
2325                 unsigned short oldc;
2326
2327                 oldc = vc->vc_video_erase_char;
2328                 vc->vc_video_erase_char &= charmask;
2329                 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2330                 vc->vc_video_erase_char = oldc;
2331         }
2332
2333
2334         if (!lock_fb_info(info))
2335                 return;
2336         event.info = info;
2337         event.data = &blank;
2338         fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
2339         unlock_fb_info(info);
2340 }
2341
2342 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2343 {
2344         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2345         struct fbcon_ops *ops = info->fbcon_par;
2346
2347         if (mode_switch) {
2348                 struct fb_var_screeninfo var = info->var;
2349
2350                 ops->graphics = 1;
2351
2352                 if (!blank) {
2353                         var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2354                         fb_set_var(info, &var);
2355                         ops->graphics = 0;
2356                         ops->var = info->var;
2357                 }
2358         }
2359
2360         if (!fbcon_is_inactive(vc, info)) {
2361                 if (ops->blank_state != blank) {
2362                         ops->blank_state = blank;
2363                         fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2364                         ops->cursor_flash = (!blank);
2365
2366                         if (!(info->flags & FBINFO_MISC_USEREVENT))
2367                                 if (fb_blank(info, blank))
2368                                         fbcon_generic_blank(vc, info, blank);
2369                 }
2370
2371                 if (!blank)
2372                         update_screen(vc);
2373         }
2374
2375         if (mode_switch || fbcon_is_inactive(vc, info) ||
2376             ops->blank_state != FB_BLANK_UNBLANK)
2377                 fbcon_del_cursor_timer(info);
2378         else
2379                 fbcon_add_cursor_timer(info);
2380
2381         return 0;
2382 }
2383
2384 static int fbcon_debug_enter(struct vc_data *vc)
2385 {
2386         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2387         struct fbcon_ops *ops = info->fbcon_par;
2388
2389         ops->save_graphics = ops->graphics;
2390         ops->graphics = 0;
2391         if (info->fbops->fb_debug_enter)
2392                 info->fbops->fb_debug_enter(info);
2393         fbcon_set_palette(vc, color_table);
2394         return 0;
2395 }
2396
2397 static int fbcon_debug_leave(struct vc_data *vc)
2398 {
2399         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2400         struct fbcon_ops *ops = info->fbcon_par;
2401
2402         ops->graphics = ops->save_graphics;
2403         if (info->fbops->fb_debug_leave)
2404                 info->fbops->fb_debug_leave(info);
2405         return 0;
2406 }
2407
2408 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2409 {
2410         u8 *fontdata = vc->vc_font.data;
2411         u8 *data = font->data;
2412         int i, j;
2413
2414         font->width = vc->vc_font.width;
2415         font->height = vc->vc_font.height;
2416         font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2417         if (!font->data)
2418                 return 0;
2419
2420         if (font->width <= 8) {
2421                 j = vc->vc_font.height;
2422                 for (i = 0; i < font->charcount; i++) {
2423                         memcpy(data, fontdata, j);
2424                         memset(data + j, 0, 32 - j);
2425                         data += 32;
2426                         fontdata += j;
2427                 }
2428         } else if (font->width <= 16) {
2429                 j = vc->vc_font.height * 2;
2430                 for (i = 0; i < font->charcount; i++) {
2431                         memcpy(data, fontdata, j);
2432                         memset(data + j, 0, 64 - j);
2433                         data += 64;
2434                         fontdata += j;
2435                 }
2436         } else if (font->width <= 24) {
2437                 for (i = 0; i < font->charcount; i++) {
2438                         for (j = 0; j < vc->vc_font.height; j++) {
2439                                 *data++ = fontdata[0];
2440                                 *data++ = fontdata[1];
2441                                 *data++ = fontdata[2];
2442                                 fontdata += sizeof(u32);
2443                         }
2444                         memset(data, 0, 3 * (32 - j));
2445                         data += 3 * (32 - j);
2446                 }
2447         } else {
2448                 j = vc->vc_font.height * 4;
2449                 for (i = 0; i < font->charcount; i++) {
2450                         memcpy(data, fontdata, j);
2451                         memset(data + j, 0, 128 - j);
2452                         data += 128;
2453                         fontdata += j;
2454                 }
2455         }
2456         return 0;
2457 }
2458
2459 static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2460                              const u8 * data, int userfont)
2461 {
2462         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2463         struct fbcon_ops *ops = info->fbcon_par;
2464         struct display *p = &fb_display[vc->vc_num];
2465         int resize;
2466         int cnt;
2467         char *old_data = NULL;
2468
2469         if (CON_IS_VISIBLE(vc) && softback_lines)
2470                 fbcon_set_origin(vc);
2471
2472         resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2473         if (p->userfont)
2474                 old_data = vc->vc_font.data;
2475         if (userfont)
2476                 cnt = FNTCHARCNT(data);
2477         else
2478                 cnt = 256;
2479         vc->vc_font.data = (void *)(p->fontdata = data);
2480         if ((p->userfont = userfont))
2481                 REFCOUNT(data)++;
2482         vc->vc_font.width = w;
2483         vc->vc_font.height = h;
2484         if (vc->vc_hi_font_mask && cnt == 256) {
2485                 vc->vc_hi_font_mask = 0;
2486                 if (vc->vc_can_do_color) {
2487                         vc->vc_complement_mask >>= 1;
2488                         vc->vc_s_complement_mask >>= 1;
2489                 }
2490
2491                 /* ++Edmund: reorder the attribute bits */
2492                 if (vc->vc_can_do_color) {
2493                         unsigned short *cp =
2494                             (unsigned short *) vc->vc_origin;
2495                         int count = vc->vc_screenbuf_size / 2;
2496                         unsigned short c;
2497                         for (; count > 0; count--, cp++) {
2498                                 c = scr_readw(cp);
2499                                 scr_writew(((c & 0xfe00) >> 1) |
2500                                            (c & 0xff), cp);
2501                         }
2502                         c = vc->vc_video_erase_char;
2503                         vc->vc_video_erase_char =
2504                             ((c & 0xfe00) >> 1) | (c & 0xff);
2505                         vc->vc_attr >>= 1;
2506                 }
2507         } else if (!vc->vc_hi_font_mask && cnt == 512) {
2508                 vc->vc_hi_font_mask = 0x100;
2509                 if (vc->vc_can_do_color) {
2510                         vc->vc_complement_mask <<= 1;
2511                         vc->vc_s_complement_mask <<= 1;
2512                 }
2513
2514                 /* ++Edmund: reorder the attribute bits */
2515                 {
2516                         unsigned short *cp =
2517                             (unsigned short *) vc->vc_origin;
2518                         int count = vc->vc_screenbuf_size / 2;
2519                         unsigned short c;
2520                         for (; count > 0; count--, cp++) {
2521                                 unsigned short newc;
2522                                 c = scr_readw(cp);
2523                                 if (vc->vc_can_do_color)
2524                                         newc =
2525                                             ((c & 0xff00) << 1) | (c &
2526                                                                    0xff);
2527                                 else
2528                                         newc = c & ~0x100;
2529                                 scr_writew(newc, cp);
2530                         }
2531                         c = vc->vc_video_erase_char;
2532                         if (vc->vc_can_do_color) {
2533                                 vc->vc_video_erase_char =
2534                                     ((c & 0xff00) << 1) | (c & 0xff);
2535                                 vc->vc_attr <<= 1;
2536                         } else
2537                                 vc->vc_video_erase_char = c & ~0x100;
2538                 }
2539
2540         }
2541
2542         if (resize) {
2543                 int cols, rows;
2544
2545                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2546                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2547                 cols /= w;
2548                 rows /= h;
2549                 vc_resize(vc, cols, rows);
2550                 if (CON_IS_VISIBLE(vc) && softback_buf)
2551                         fbcon_update_softback(vc);
2552         } else if (CON_IS_VISIBLE(vc)
2553                    && vc->vc_mode == KD_TEXT) {
2554                 fbcon_clear_margins(vc, 0);
2555                 update_screen(vc);
2556         }
2557
2558         if (old_data && (--REFCOUNT(old_data) == 0))
2559                 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2560         return 0;
2561 }
2562
2563 static int fbcon_copy_font(struct vc_data *vc, int con)
2564 {
2565         struct display *od = &fb_display[con];
2566         struct console_font *f = &vc->vc_font;
2567
2568         if (od->fontdata == f->data)
2569                 return 0;       /* already the same font... */
2570         return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2571 }
2572
2573 /*
2574  *  User asked to set font; we are guaranteed that
2575  *      a) width and height are in range 1..32
2576  *      b) charcount does not exceed 512
2577  *  but lets not assume that, since someone might someday want to use larger
2578  *  fonts. And charcount of 512 is small for unicode support.
2579  *
2580  *  However, user space gives the font in 32 rows , regardless of
2581  *  actual font height. So a new API is needed if support for larger fonts
2582  *  is ever implemented.
2583  */
2584
2585 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2586 {
2587         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2588         unsigned charcount = font->charcount;
2589         int w = font->width;
2590         int h = font->height;
2591         int size;
2592         int i, csum;
2593         u8 *new_data, *data = font->data;
2594         int pitch = (font->width+7) >> 3;
2595
2596         /* Is there a reason why fbconsole couldn't handle any charcount >256?
2597          * If not this check should be changed to charcount < 256 */
2598         if (charcount != 256 && charcount != 512)
2599                 return -EINVAL;
2600
2601         /* Make sure drawing engine can handle the font */
2602         if (!(info->pixmap.blit_x & (1 << (font->width - 1))) ||
2603             !(info->pixmap.blit_y & (1 << (font->height - 1))))
2604                 return -EINVAL;
2605
2606         /* Make sure driver can handle the font length */
2607         if (fbcon_invalid_charcount(info, charcount))
2608                 return -EINVAL;
2609
2610         size = h * pitch * charcount;
2611
2612         new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2613
2614         if (!new_data)
2615                 return -ENOMEM;
2616
2617         new_data += FONT_EXTRA_WORDS * sizeof(int);
2618         FNTSIZE(new_data) = size;
2619         FNTCHARCNT(new_data) = charcount;
2620         REFCOUNT(new_data) = 0; /* usage counter */
2621         for (i=0; i< charcount; i++) {
2622                 memcpy(new_data + i*h*pitch, data +  i*32*pitch, h*pitch);
2623         }
2624
2625         /* Since linux has a nice crc32 function use it for counting font
2626          * checksums. */
2627         csum = crc32(0, new_data, size);
2628
2629         FNTSUM(new_data) = csum;
2630         /* Check if the same font is on some other console already */
2631         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2632                 struct vc_data *tmp = vc_cons[i].d;
2633
2634                 if (fb_display[i].userfont &&
2635                     fb_display[i].fontdata &&
2636                     FNTSUM(fb_display[i].fontdata) == csum &&
2637                     FNTSIZE(fb_display[i].fontdata) == size &&
2638                     tmp->vc_font.width == w &&
2639                     !memcmp(fb_display[i].fontdata, new_data, size)) {
2640                         kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2641                         new_data = (u8 *)fb_display[i].fontdata;
2642                         break;
2643                 }
2644         }
2645         return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2646 }
2647
2648 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2649 {
2650         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2651         const struct font_desc *f;
2652
2653         if (!name)
2654                 f = get_default_font(info->var.xres, info->var.yres,
2655                                      info->pixmap.blit_x, info->pixmap.blit_y);
2656         else if (!(f = find_font(name)))
2657                 return -ENOENT;
2658
2659         font->width = f->width;
2660         font->height = f->height;
2661         return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2662 }
2663
2664 static u16 palette_red[16];
2665 static u16 palette_green[16];
2666 static u16 palette_blue[16];
2667
2668 static struct fb_cmap palette_cmap = {
2669         0, 16, palette_red, palette_green, palette_blue, NULL
2670 };
2671
2672 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
2673 {
2674         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2675         int i, j, k, depth;
2676         u8 val;
2677
2678         if (fbcon_is_inactive(vc, info))
2679                 return -EINVAL;
2680
2681         if (!CON_IS_VISIBLE(vc))
2682                 return 0;
2683
2684         depth = fb_get_color_depth(&info->var, &info->fix);
2685         if (depth > 3) {
2686                 for (i = j = 0; i < 16; i++) {
2687                         k = table[i];
2688                         val = vc->vc_palette[j++];
2689                         palette_red[k] = (val << 8) | val;
2690                         val = vc->vc_palette[j++];
2691                         palette_green[k] = (val << 8) | val;
2692                         val = vc->vc_palette[j++];
2693                         palette_blue[k] = (val << 8) | val;
2694                 }
2695                 palette_cmap.len = 16;
2696                 palette_cmap.start = 0;
2697         /*
2698          * If framebuffer is capable of less than 16 colors,
2699          * use default palette of fbcon.
2700          */
2701         } else
2702                 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2703
2704         return fb_set_cmap(&palette_cmap, info);
2705 }
2706
2707 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2708 {
2709         unsigned long p;
2710         int line;
2711
2712         if (vc->vc_num != fg_console || !softback_lines)
2713                 return (u16 *) (vc->vc_origin + offset);
2714         line = offset / vc->vc_size_row;
2715         if (line >= softback_lines)
2716                 return (u16 *) (vc->vc_origin + offset -
2717                                 softback_lines * vc->vc_size_row);
2718         p = softback_curr + offset;
2719         if (p >= softback_end)
2720                 p += softback_buf - softback_end;
2721         return (u16 *) p;
2722 }
2723
2724 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2725                                  int *px, int *py)
2726 {
2727         unsigned long ret;
2728         int x, y;
2729
2730         if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2731                 unsigned long offset = (pos - vc->vc_origin) / 2;
2732
2733                 x = offset % vc->vc_cols;
2734                 y = offset / vc->vc_cols;
2735                 if (vc->vc_num == fg_console)
2736                         y += softback_lines;
2737                 ret = pos + (vc->vc_cols - x) * 2;
2738         } else if (vc->vc_num == fg_console && softback_lines) {
2739                 unsigned long offset = pos - softback_curr;
2740
2741                 if (pos < softback_curr)
2742                         offset += softback_end - softback_buf;
2743                 offset /= 2;
2744                 x = offset % vc->vc_cols;
2745                 y = offset / vc->vc_cols;
2746                 ret = pos + (vc->vc_cols - x) * 2;
2747                 if (ret == softback_end)
2748                         ret = softback_buf;
2749                 if (ret == softback_in)
2750                         ret = vc->vc_origin;
2751         } else {
2752                 /* Should not happen */
2753                 x = y = 0;
2754                 ret = vc->vc_origin;
2755         }
2756         if (px)
2757                 *px = x;
2758         if (py)
2759                 *py = y;
2760         return ret;
2761 }
2762
2763 /* As we might be inside of softback, we may work with non-contiguous buffer,
2764    that's why we have to use a separate routine. */
2765 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2766 {
2767         while (cnt--) {
2768                 u16 a = scr_readw(p);
2769                 if (!vc->vc_can_do_color)
2770                         a ^= 0x0800;
2771                 else if (vc->vc_hi_font_mask == 0x100)
2772                         a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2773                             (((a) & 0x0e00) << 4);
2774                 else
2775                         a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2776                             (((a) & 0x0700) << 4);
2777                 scr_writew(a, p++);
2778                 if (p == (u16 *) softback_end)
2779                         p = (u16 *) softback_buf;
2780                 if (p == (u16 *) softback_in)
2781                         p = (u16 *) vc->vc_origin;
2782         }
2783 }
2784
2785 static int fbcon_scrolldelta(struct vc_data *vc, int lines)
2786 {
2787         struct fb_info *info = registered_fb[con2fb_map[fg_console]];
2788         struct fbcon_ops *ops = info->fbcon_par;
2789         struct display *disp = &fb_display[fg_console];
2790         int offset, limit, scrollback_old;
2791
2792         if (softback_top) {
2793                 if (vc->vc_num != fg_console)
2794                         return 0;
2795                 if (vc->vc_mode != KD_TEXT || !lines)
2796                         return 0;
2797                 if (logo_shown >= 0) {
2798                         struct vc_data *conp2 = vc_cons[logo_shown].d;
2799
2800                         if (conp2->vc_top == logo_lines
2801                             && conp2->vc_bottom == conp2->vc_rows)
2802                                 conp2->vc_top = 0;
2803                         if (logo_shown == vc->vc_num) {
2804                                 unsigned long p, q;
2805                                 int i;
2806
2807                                 p = softback_in;
2808                                 q = vc->vc_origin +
2809                                     logo_lines * vc->vc_size_row;
2810                                 for (i = 0; i < logo_lines; i++) {
2811                                         if (p == softback_top)
2812                                                 break;
2813                                         if (p == softback_buf)
2814                                                 p = softback_end;
2815                                         p -= vc->vc_size_row;
2816                                         q -= vc->vc_size_row;
2817                                         scr_memcpyw((u16 *) q, (u16 *) p,
2818                                                     vc->vc_size_row);
2819                                 }
2820                                 softback_in = softback_curr = p;
2821                                 update_region(vc, vc->vc_origin,
2822                                               logo_lines * vc->vc_cols);
2823                         }
2824                         logo_shown = FBCON_LOGO_CANSHOW;
2825                 }
2826                 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2827                 fbcon_redraw_softback(vc, disp, lines);
2828                 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2829                 return 0;
2830         }
2831
2832         if (!scrollback_phys_max)
2833                 return -ENOSYS;
2834
2835         scrollback_old = scrollback_current;
2836         scrollback_current -= lines;
2837         if (scrollback_current < 0)
2838                 scrollback_current = 0;
2839         else if (scrollback_current > scrollback_max)
2840                 scrollback_current = scrollback_max;
2841         if (scrollback_current == scrollback_old)
2842                 return 0;
2843
2844         if (fbcon_is_inactive(vc, info))
2845                 return 0;
2846
2847         fbcon_cursor(vc, CM_ERASE);
2848
2849         offset = disp->yscroll - scrollback_current;
2850         limit = disp->vrows;
2851         switch (disp->scrollmode) {
2852         case SCROLL_WRAP_MOVE:
2853                 info->var.vmode |= FB_VMODE_YWRAP;
2854                 break;
2855         case SCROLL_PAN_MOVE:
2856         case SCROLL_PAN_REDRAW:
2857                 limit -= vc->vc_rows;
2858                 info->var.vmode &= ~FB_VMODE_YWRAP;
2859                 break;
2860         }
2861         if (offset < 0)
2862                 offset += limit;
2863         else if (offset >= limit)
2864                 offset -= limit;
2865
2866         ops->var.xoffset = 0;
2867         ops->var.yoffset = offset * vc->vc_font.height;
2868         ops->update_start(info);
2869
2870         if (!scrollback_current)
2871                 fbcon_cursor(vc, CM_DRAW);
2872         return 0;
2873 }
2874
2875 static int fbcon_set_origin(struct vc_data *vc)
2876 {
2877         if (softback_lines)
2878                 fbcon_scrolldelta(vc, softback_lines);
2879         return 0;
2880 }
2881
2882 static void fbcon_suspended(struct fb_info *info)
2883 {
2884         struct vc_data *vc = NULL;
2885         struct fbcon_ops *ops = info->fbcon_par;
2886
2887         if (!ops || ops->currcon < 0)
2888                 return;
2889         vc = vc_cons[ops->currcon].d;
2890
2891         /* Clear cursor, restore saved data */
2892         fbcon_cursor(vc, CM_ERASE);
2893 }
2894
2895 static void fbcon_resumed(struct fb_info *info)
2896 {
2897         struct vc_data *vc;
2898         struct fbcon_ops *ops = info->fbcon_par;
2899
2900         if (!ops || ops->currcon < 0)
2901                 return;
2902         vc = vc_cons[ops->currcon].d;
2903
2904         update_screen(vc);
2905 }
2906
2907 static void fbcon_modechanged(struct fb_info *info)
2908 {
2909         struct fbcon_ops *ops = info->fbcon_par;
2910         struct vc_data *vc;
2911         struct display *p;
2912         int rows, cols;
2913
2914         if (!ops || ops->currcon < 0)
2915                 return;
2916         vc = vc_cons[ops->currcon].d;
2917         if (vc->vc_mode != KD_TEXT ||
2918             registered_fb[con2fb_map[ops->currcon]] != info)
2919                 return;
2920
2921         p = &fb_display[vc->vc_num];
2922         set_blitting_type(vc, info);
2923
2924         if (CON_IS_VISIBLE(vc)) {
2925                 var_to_display(p, &info->var, info);
2926                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2927                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2928                 cols /= vc->vc_font.width;
2929                 rows /= vc->vc_font.height;
2930                 vc_resize(vc, cols, rows);
2931                 updatescrollmode(p, info, vc);
2932                 scrollback_max = 0;
2933                 scrollback_current = 0;
2934
2935                 if (!fbcon_is_inactive(vc, info)) {
2936                     ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2937                     ops->update_start(info);
2938                 }
2939
2940                 fbcon_set_palette(vc, color_table);
2941                 update_screen(vc);
2942                 if (softback_buf)
2943                         fbcon_update_softback(vc);
2944         }
2945 }
2946
2947 static void fbcon_set_all_vcs(struct fb_info *info)
2948 {
2949         struct fbcon_ops *ops = info->fbcon_par;
2950         struct vc_data *vc;
2951         struct display *p;
2952         int i, rows, cols, fg = -1;
2953
2954         if (!ops || ops->currcon < 0)
2955                 return;
2956
2957         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2958                 vc = vc_cons[i].d;
2959                 if (!vc || vc->vc_mode != KD_TEXT ||
2960                     registered_fb[con2fb_map[i]] != info)
2961                         continue;
2962
2963                 if (CON_IS_VISIBLE(vc)) {
2964                         fg = i;
2965                         continue;
2966                 }
2967
2968                 p = &fb_display[vc->vc_num];
2969                 set_blitting_type(vc, info);
2970                 var_to_display(p, &info->var, info);
2971                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2972                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2973                 cols /= vc->vc_font.width;
2974                 rows /= vc->vc_font.height;
2975                 vc_resize(vc, cols, rows);
2976         }
2977
2978         if (fg != -1)
2979                 fbcon_modechanged(info);
2980 }
2981
2982 static int fbcon_mode_deleted(struct fb_info *info,
2983                               struct fb_videomode *mode)
2984 {
2985         struct fb_info *fb_info;
2986         struct display *p;
2987         int i, j, found = 0;
2988
2989         /* before deletion, ensure that mode is not in use */
2990         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2991                 j = con2fb_map[i];
2992                 if (j == -1)
2993                         continue;
2994                 fb_info = registered_fb[j];
2995                 if (fb_info != info)
2996                         continue;
2997                 p = &fb_display[i];
2998                 if (!p || !p->mode)
2999                         continue;
3000                 if (fb_mode_is_equal(p->mode, mode)) {
3001                         found = 1;
3002                         break;
3003                 }
3004         }
3005         return found;
3006 }
3007
3008 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
3009 static int fbcon_unbind(void)
3010 {
3011         int ret;
3012
3013         ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
3014                                 fbcon_is_default);
3015
3016         if (!ret)
3017                 fbcon_has_console_bind = 0;
3018
3019         return ret;
3020 }
3021 #else
3022 static inline int fbcon_unbind(void)
3023 {
3024         return -EINVAL;
3025 }
3026 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3027
3028 static int fbcon_fb_unbind(int idx)
3029 {
3030         int i, new_idx = -1, ret = 0;
3031
3032         if (!fbcon_has_console_bind)
3033                 return 0;
3034
3035         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3036                 if (con2fb_map[i] != idx &&
3037                     con2fb_map[i] != -1) {
3038                         new_idx = i;
3039                         break;
3040                 }
3041         }
3042
3043         if (new_idx != -1) {
3044                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3045                         if (con2fb_map[i] == idx)
3046                                 set_con2fb_map(i, new_idx, 0);
3047                 }
3048         } else
3049                 ret = fbcon_unbind();
3050
3051         return ret;
3052 }
3053
3054 static int fbcon_fb_unregistered(struct fb_info *info)
3055 {
3056         int i, idx;
3057
3058         idx = info->node;
3059         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3060                 if (con2fb_map[i] == idx)
3061                         con2fb_map[i] = -1;
3062         }
3063
3064         if (idx == info_idx) {
3065                 info_idx = -1;
3066
3067                 for (i = 0; i < FB_MAX; i++) {
3068                         if (registered_fb[i] != NULL) {
3069                                 info_idx = i;
3070                                 break;
3071                         }
3072                 }
3073         }
3074
3075         if (info_idx != -1) {
3076                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3077                         if (con2fb_map[i] == -1)
3078                                 con2fb_map[i] = info_idx;
3079                 }
3080         }
3081
3082         if (primary_device == idx)
3083                 primary_device = -1;
3084
3085         if (!num_registered_fb)
3086                 do_unregister_con_driver(&fb_con);
3087
3088         return 0;
3089 }
3090
3091 static void fbcon_remap_all(int idx)
3092 {
3093         int i;
3094         for (i = first_fb_vc; i <= last_fb_vc; i++)
3095                 set_con2fb_map(i, idx, 0);
3096
3097         if (con_is_bound(&fb_con)) {
3098                 printk(KERN_INFO "fbcon: Remapping primary device, "
3099                        "fb%i, to tty %i-%i\n", idx,
3100                        first_fb_vc + 1, last_fb_vc + 1);
3101                 info_idx = idx;
3102         }
3103 }
3104
3105 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
3106 static void fbcon_select_primary(struct fb_info *info)
3107 {
3108         if (!map_override && primary_device == -1 &&
3109             fb_is_primary_device(info)) {
3110                 int i;
3111
3112                 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n",
3113                        info->fix.id, info->node);
3114                 primary_device = info->node;
3115
3116                 for (i = first_fb_vc; i <= last_fb_vc; i++)
3117                         con2fb_map_boot[i] = primary_device;
3118
3119                 if (con_is_bound(&fb_con)) {
3120                         printk(KERN_INFO "fbcon: Remapping primary device, "
3121                                "fb%i, to tty %i-%i\n", info->node,
3122                                first_fb_vc + 1, last_fb_vc + 1);
3123                         info_idx = primary_device;
3124                 }
3125         }
3126
3127 }
3128 #else
3129 static inline void fbcon_select_primary(struct fb_info *info)
3130 {
3131         return;
3132 }
3133 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
3134
3135 static int fbcon_fb_registered(struct fb_info *info)
3136 {
3137         int ret = 0, i, idx;
3138
3139         idx = info->node;
3140         fbcon_select_primary(info);
3141
3142         if (info_idx == -1) {
3143                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3144                         if (con2fb_map_boot[i] == idx) {
3145                                 info_idx = idx;
3146                                 break;
3147                         }
3148                 }
3149
3150                 if (info_idx != -1)
3151                         ret = do_fbcon_takeover(1);
3152         } else {
3153                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3154                         if (con2fb_map_boot[i] == idx)
3155                                 set_con2fb_map(i, idx, 0);
3156                 }
3157         }
3158
3159         return ret;
3160 }
3161
3162 static void fbcon_fb_blanked(struct fb_info *info, int blank)
3163 {
3164         struct fbcon_ops *ops = info->fbcon_par;
3165         struct vc_data *vc;
3166
3167         if (!ops || ops->currcon < 0)
3168                 return;
3169
3170         vc = vc_cons[ops->currcon].d;
3171         if (vc->vc_mode != KD_TEXT ||
3172                         registered_fb[con2fb_map[ops->currcon]] != info)
3173                 return;
3174
3175         if (CON_IS_VISIBLE(vc)) {
3176                 if (blank)
3177                         do_blank_screen(0);
3178                 else
3179                         do_unblank_screen(0);
3180         }
3181         ops->blank_state = blank;
3182 }
3183
3184 static void fbcon_new_modelist(struct fb_info *info)
3185 {
3186         int i;
3187         struct vc_data *vc;
3188         struct fb_var_screeninfo var;
3189         const struct fb_videomode *mode;
3190
3191         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3192                 if (registered_fb[con2fb_map[i]] != info)
3193                         continue;
3194                 if (!fb_display[i].mode)
3195                         continue;
3196                 vc = vc_cons[i].d;
3197                 display_to_var(&var, &fb_display[i]);
3198                 mode = fb_find_nearest_mode(fb_display[i].mode,
3199                                             &info->modelist);
3200                 fb_videomode_to_var(&var, mode);
3201                 fbcon_set_disp(info, &var, vc->vc_num);
3202         }
3203 }
3204
3205 static void fbcon_get_requirement(struct fb_info *info,
3206                                   struct fb_blit_caps *caps)
3207 {
3208         struct vc_data *vc;
3209         struct display *p;
3210
3211         if (caps->flags) {
3212                 int i, charcnt;
3213
3214                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3215                         vc = vc_cons[i].d;
3216                         if (vc && vc->vc_mode == KD_TEXT &&
3217                             info->node == con2fb_map[i]) {
3218                                 p = &fb_display[i];
3219                                 caps->x |= 1 << (vc->vc_font.width - 1);
3220                                 caps->y |= 1 << (vc->vc_font.height - 1);
3221                                 charcnt = (p->userfont) ?
3222                                         FNTCHARCNT(p->fontdata) : 256;
3223                                 if (caps->len < charcnt)
3224                                         caps->len = charcnt;
3225                         }
3226                 }
3227         } else {
3228                 vc = vc_cons[fg_console].d;
3229
3230                 if (vc && vc->vc_mode == KD_TEXT &&
3231                     info->node == con2fb_map[fg_console]) {
3232                         p = &fb_display[fg_console];
3233                         caps->x = 1 << (vc->vc_font.width - 1);
3234                         caps->y = 1 << (vc->vc_font.height - 1);
3235                         caps->len = (p->userfont) ?
3236                                 FNTCHARCNT(p->fontdata) : 256;
3237                 }
3238         }
3239 }
3240
3241 static int fbcon_event_notify(struct notifier_block *self,
3242                               unsigned long action, void *data)
3243 {
3244         struct fb_event *event = data;
3245         struct fb_info *info = event->info;
3246         struct fb_videomode *mode;
3247         struct fb_con2fbmap *con2fb;
3248         struct fb_blit_caps *caps;
3249         int idx, ret = 0;
3250
3251         /*
3252          * ignore all events except driver registration and deregistration
3253          * if fbcon is not active
3254          */
3255         if (fbcon_has_exited && !(action == FB_EVENT_FB_REGISTERED ||
3256                                   action == FB_EVENT_FB_UNREGISTERED))
3257                 goto done;
3258
3259         switch(action) {
3260         case FB_EVENT_SUSPEND:
3261                 fbcon_suspended(info);
3262                 break;
3263         case FB_EVENT_RESUME:
3264                 fbcon_resumed(info);
3265                 break;
3266         case FB_EVENT_MODE_CHANGE:
3267                 fbcon_modechanged(info);
3268                 break;
3269         case FB_EVENT_MODE_CHANGE_ALL:
3270                 fbcon_set_all_vcs(info);
3271                 break;
3272         case FB_EVENT_MODE_DELETE:
3273                 mode = event->data;
3274                 ret = fbcon_mode_deleted(info, mode);
3275                 break;
3276         case FB_EVENT_FB_UNBIND:
3277                 idx = info->node;
3278                 ret = fbcon_fb_unbind(idx);
3279                 break;
3280         case FB_EVENT_FB_REGISTERED:
3281                 ret = fbcon_fb_registered(info);
3282                 break;
3283         case FB_EVENT_FB_UNREGISTERED:
3284                 ret = fbcon_fb_unregistered(info);
3285                 break;
3286         case FB_EVENT_SET_CONSOLE_MAP:
3287                 con2fb = event->data;
3288                 ret = set_con2fb_map(con2fb->console - 1,
3289                                      con2fb->framebuffer, 1);
3290                 break;
3291         case FB_EVENT_GET_CONSOLE_MAP:
3292                 con2fb = event->data;
3293                 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
3294                 break;
3295         case FB_EVENT_BLANK:
3296                 fbcon_fb_blanked(info, *(int *)event->data);
3297                 break;
3298         case FB_EVENT_NEW_MODELIST:
3299                 fbcon_new_modelist(info);
3300                 break;
3301         case FB_EVENT_GET_REQ:
3302                 caps = event->data;
3303                 fbcon_get_requirement(info, caps);
3304                 break;
3305         case FB_EVENT_REMAP_ALL_CONSOLE:
3306                 idx = info->node;
3307                 fbcon_remap_all(idx);
3308                 break;
3309         }
3310 done:
3311         return ret;
3312 }
3313
3314 /*
3315  *  The console `switch' structure for the frame buffer based console
3316  */
3317
3318 static const struct consw fb_con = {
3319         .owner                  = THIS_MODULE,
3320         .con_startup            = fbcon_startup,
3321         .con_init               = fbcon_init,
3322         .con_deinit             = fbcon_deinit,
3323         .con_clear              = fbcon_clear,
3324         .con_putc               = fbcon_putc,
3325         .con_putcs              = fbcon_putcs,
3326         .con_cursor             = fbcon_cursor,
3327         .con_scroll             = fbcon_scroll,
3328         .con_bmove              = fbcon_bmove,
3329         .con_switch             = fbcon_switch,
3330         .con_blank              = fbcon_blank,
3331         .con_font_set           = fbcon_set_font,
3332         .con_font_get           = fbcon_get_font,
3333         .con_font_default       = fbcon_set_def_font,
3334         .con_font_copy          = fbcon_copy_font,
3335         .con_set_palette        = fbcon_set_palette,
3336         .con_scrolldelta        = fbcon_scrolldelta,
3337         .con_set_origin         = fbcon_set_origin,
3338         .con_invert_region      = fbcon_invert_region,
3339         .con_screen_pos         = fbcon_screen_pos,
3340         .con_getxy              = fbcon_getxy,
3341         .con_resize             = fbcon_resize,
3342         .con_debug_enter        = fbcon_debug_enter,
3343         .con_debug_leave        = fbcon_debug_leave,
3344 };
3345
3346 static struct notifier_block fbcon_event_notifier = {
3347         .notifier_call  = fbcon_event_notify,
3348 };
3349
3350 static ssize_t store_rotate(struct device *device,
3351                             struct device_attribute *attr, const char *buf,
3352                             size_t count)
3353 {
3354         struct fb_info *info;
3355         int rotate, idx;
3356         char **last = NULL;
3357
3358         if (fbcon_has_exited)
3359                 return count;
3360
3361         console_lock();
3362         idx = con2fb_map[fg_console];
3363
3364         if (idx == -1 || registered_fb[idx] == NULL)
3365                 goto err;
3366
3367         info = registered_fb[idx];
3368         rotate = simple_strtoul(buf, last, 0);
3369         fbcon_rotate(info, rotate);
3370 err:
3371         console_unlock();
3372         return count;
3373 }
3374
3375 static ssize_t store_rotate_all(struct device *device,
3376                                 struct device_attribute *attr,const char *buf,
3377                                 size_t count)
3378 {
3379         struct fb_info *info;
3380         int rotate, idx;
3381         char **last = NULL;
3382
3383         if (fbcon_has_exited)
3384                 return count;
3385
3386         console_lock();
3387         idx = con2fb_map[fg_console];
3388
3389         if (idx == -1 || registered_fb[idx] == NULL)
3390                 goto err;
3391
3392         info = registered_fb[idx];
3393         rotate = simple_strtoul(buf, last, 0);
3394         fbcon_rotate_all(info, rotate);
3395 err:
3396         console_unlock();
3397         return count;
3398 }
3399
3400 static ssize_t show_rotate(struct device *device,
3401                            struct device_attribute *attr,char *buf)
3402 {
3403         struct fb_info *info;
3404         int rotate = 0, idx;
3405
3406         if (fbcon_has_exited)
3407                 return 0;
3408
3409         console_lock();
3410         idx = con2fb_map[fg_console];
3411
3412         if (idx == -1 || registered_fb[idx] == NULL)
3413                 goto err;
3414
3415         info = registered_fb[idx];
3416         rotate = fbcon_get_rotate(info);
3417 err:
3418         console_unlock();
3419         return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3420 }
3421
3422 static ssize_t show_cursor_blink(struct device *device,
3423                                  struct device_attribute *attr, char *buf)
3424 {
3425         struct fb_info *info;
3426         struct fbcon_ops *ops;
3427         int idx, blink = -1;
3428
3429         if (fbcon_has_exited)
3430                 return 0;
3431
3432         console_lock();
3433         idx = con2fb_map[fg_console];
3434
3435         if (idx == -1 || registered_fb[idx] == NULL)
3436                 goto err;
3437
3438         info = registered_fb[idx];
3439         ops = info->fbcon_par;
3440
3441         if (!ops)
3442                 goto err;
3443
3444         blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0;
3445 err:
3446         console_unlock();
3447         return snprintf(buf, PAGE_SIZE, "%d\n", blink);
3448 }
3449
3450 static ssize_t store_cursor_blink(struct device *device,
3451                                   struct device_attribute *attr,
3452                                   const char *buf, size_t count)
3453 {
3454         struct fb_info *info;
3455         int blink, idx;
3456         char **last = NULL;
3457
3458         if (fbcon_has_exited)
3459                 return count;
3460
3461         console_lock();
3462         idx = con2fb_map[fg_console];
3463
3464         if (idx == -1 || registered_fb[idx] == NULL)
3465                 goto err;
3466
3467         info = registered_fb[idx];
3468
3469         if (!info->fbcon_par)
3470                 goto err;
3471
3472         blink = simple_strtoul(buf, last, 0);
3473
3474         if (blink) {
3475                 fbcon_cursor_noblink = 0;
3476                 fbcon_add_cursor_timer(info);
3477         } else {
3478                 fbcon_cursor_noblink = 1;
3479                 fbcon_del_cursor_timer(info);
3480         }
3481
3482 err:
3483         console_unlock();
3484         return count;
3485 }
3486
3487 static struct device_attribute device_attrs[] = {
3488         __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3489         __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3490         __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink,
3491                store_cursor_blink),
3492 };
3493
3494 static int fbcon_init_device(void)
3495 {
3496         int i, error = 0;
3497
3498         fbcon_has_sysfs = 1;
3499
3500         for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3501                 error = device_create_file(fbcon_device, &device_attrs[i]);
3502
3503                 if (error)
3504                         break;
3505         }
3506
3507         if (error) {
3508                 while (--i >= 0)
3509                         device_remove_file(fbcon_device, &device_attrs[i]);
3510
3511                 fbcon_has_sysfs = 0;
3512         }
3513
3514         return 0;
3515 }
3516
3517 static void fbcon_start(void)
3518 {
3519         if (num_registered_fb) {
3520                 int i;
3521
3522                 console_lock();
3523
3524                 for (i = 0; i < FB_MAX; i++) {
3525                         if (registered_fb[i] != NULL) {
3526                                 info_idx = i;
3527                                 break;
3528                         }
3529                 }
3530
3531                 console_unlock();
3532                 fbcon_takeover(0);
3533         }
3534 }
3535
3536 static void fbcon_exit(void)
3537 {
3538         struct fb_info *info;
3539         int i, j, mapped;
3540
3541         if (fbcon_has_exited)
3542                 return;
3543
3544         kfree((void *)softback_buf);
3545         softback_buf = 0UL;
3546
3547         for (i = 0; i < FB_MAX; i++) {
3548                 int pending = 0;
3549
3550                 mapped = 0;
3551                 info = registered_fb[i];
3552
3553                 if (info == NULL)
3554                         continue;
3555
3556                 if (info->queue.func)
3557                         pending = cancel_work_sync(&info->queue);
3558                 DPRINTK("fbcon: %s pending work\n", (pending ? "canceled" :
3559                         "no"));
3560
3561                 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3562                         if (con2fb_map[j] == i)
3563                                 mapped = 1;
3564                 }
3565
3566                 if (mapped) {
3567                         if (info->fbops->fb_release)
3568                                 info->fbops->fb_release(info, 0);
3569                         module_put(info->fbops->owner);
3570
3571                         if (info->fbcon_par) {
3572                                 struct fbcon_ops *ops = info->fbcon_par;
3573
3574                                 fbcon_del_cursor_timer(info);
3575                                 kfree(ops->cursor_src);
3576                                 kfree(info->fbcon_par);
3577                                 info->fbcon_par = NULL;
3578                         }
3579
3580                         if (info->queue.func == fb_flashcursor)
3581                                 info->queue.func = NULL;
3582                 }
3583         }
3584
3585         fbcon_has_exited = 1;
3586 }
3587
3588 static int __init fb_console_init(void)
3589 {
3590         int i;
3591
3592         console_lock();
3593         fb_register_client(&fbcon_event_notifier);
3594         fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL,
3595                                      "fbcon");
3596
3597         if (IS_ERR(fbcon_device)) {
3598                 printk(KERN_WARNING "Unable to create device "
3599                        "for fbcon; errno = %ld\n",
3600                        PTR_ERR(fbcon_device));
3601                 fbcon_device = NULL;
3602         } else
3603                 fbcon_init_device();
3604
3605         for (i = 0; i < MAX_NR_CONSOLES; i++)
3606                 con2fb_map[i] = -1;
3607
3608         console_unlock();
3609         fbcon_start();
3610         return 0;
3611 }
3612
3613 module_init(fb_console_init);
3614
3615 #ifdef MODULE
3616
3617 static void __exit fbcon_deinit_device(void)
3618 {
3619         int i;
3620
3621         if (fbcon_has_sysfs) {
3622                 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3623                         device_remove_file(fbcon_device, &device_attrs[i]);
3624
3625                 fbcon_has_sysfs = 0;
3626         }
3627 }
3628
3629 static void __exit fb_console_exit(void)
3630 {
3631         console_lock();
3632         fb_unregister_client(&fbcon_event_notifier);
3633         fbcon_deinit_device();
3634         device_destroy(fb_class, MKDEV(0, 0));
3635         fbcon_exit();
3636         console_unlock();
3637         unregister_con_driver(&fb_con);
3638 }
3639
3640 module_exit(fb_console_exit);
3641
3642 #endif
3643
3644 MODULE_LICENSE("GPL");