kernel/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 static int fbcon_cursor_noblink;
 150
 151 #define divides(a, b)   ((!(a) || (b)%(a)) ? 0 : 1)
 152
 153 /*
 154  *  Interface used by the world
 155  */
 156
 157 static const char *fbcon_startup(void);
 158 static void fbcon_init(struct vc_data *vc, int init);
 159 static void fbcon_deinit(struct vc_data *vc);
 160 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
 161                         int width);
 162 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
 163 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
 164                         int count, int ypos, int xpos);
 165 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
 166 static void fbcon_cursor(struct vc_data *vc, int mode);
 167 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
 168                         int count);
 169 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
 170                         int height, int width);
 171 static int fbcon_switch(struct vc_data *vc);
 172 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
 173 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table);
 174 static int fbcon_scrolldelta(struct vc_data *vc, int lines);
 175
 176 /*
 177  *  Internal routines
 178  */
 179 static __inline__ void ywrap_up(struct vc_data *vc, int count);
 180 static __inline__ void ywrap_down(struct vc_data *vc, int count);
 181 static __inline__ void ypan_up(struct vc_data *vc, int count);
 182 static __inline__ void ypan_down(struct vc_data *vc, int count);
 183 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
 184                             int dy, int dx, int height, int width, u_int y_break);
 185 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
 186                            int unit);
 187 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
 188                               int line, int count, int dy);
 189 static void fbcon_modechanged(struct fb_info *info);
 190 static void fbcon_set_all_vcs(struct fb_info *info);
 191 static void fbcon_start(void);
 192 static void fbcon_exit(void);
 193 static struct device *fbcon_device;
 194
 195 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
 196 static inline void fbcon_set_rotation(struct fb_info *info)
 197 {
 198         struct fbcon_ops *ops = info->fbcon_par;
 199
 200         if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
 201             ops->p->con_rotate < 4)
 202                 ops->rotate = ops->p->con_rotate;
 203         else
 204                 ops->rotate = 0;
 205 }
 206
 207 static void fbcon_rotate(struct fb_info *info, u32 rotate)
 208 {
 209         struct fbcon_ops *ops= info->fbcon_par;
 210         struct fb_info *fb_info;
 211
 212         if (!ops || ops->currcon == -1)
 213                 return;
 214
 215         fb_info = registered_fb[con2fb_map[ops->currcon]];
 216
 217         if (info == fb_info) {
 218                 struct display *p = &fb_display[ops->currcon];
 219
 220                 if (rotate < 4)
 221                         p->con_rotate = rotate;
 222                 else
 223                         p->con_rotate = 0;
 224
 225                 fbcon_modechanged(info);
 226         }
 227 }
 228
 229 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
 230 {
 231         struct fbcon_ops *ops = info->fbcon_par;
 232         struct vc_data *vc;
 233         struct display *p;
 234         int i;
 235
 236         if (!ops || ops->currcon < 0 || rotate > 3)
 237                 return;
 238
 239         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 240                 vc = vc_cons[i].d;
 241                 if (!vc || vc->vc_mode != KD_TEXT ||
 242                     registered_fb[con2fb_map[i]] != info)
 243                         continue;
 244
 245                 p = &fb_display[vc->vc_num];
 246                 p->con_rotate = rotate;
 247         }
 248
 249         fbcon_set_all_vcs(info);
 250 }
 251 #else
 252 static inline void fbcon_set_rotation(struct fb_info *info)
 253 {
 254         struct fbcon_ops *ops = info->fbcon_par;
 255
 256         ops->rotate = FB_ROTATE_UR;
 257 }
 258
 259 static void fbcon_rotate(struct fb_info *info, u32 rotate)
 260 {
 261         return;
 262 }
 263
 264 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
 265 {
 266         return;
 267 }
 268 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
 269
 270 static int fbcon_get_rotate(struct fb_info *info)
 271 {
 272         struct fbcon_ops *ops = info->fbcon_par;
 273
 274         return (ops) ? ops->rotate : 0;
 275 }
 276
 277 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
 278 {
 279         struct fbcon_ops *ops = info->fbcon_par;
 280
 281         return (info->state != FBINFO_STATE_RUNNING ||
 282                 vc->vc_mode != KD_TEXT || ops->graphics) &&
 283                 !vt_force_oops_output(vc);
 284 }
 285
 286 static int get_color(struct vc_data *vc, struct fb_info *info,
 287               u16 c, int is_fg)
 288 {
 289         int depth = fb_get_color_depth(&info->var, &info->fix);
 290         int color = 0;
 291
 292         if (console_blanked) {
 293                 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
 294
 295                 c = vc->vc_video_erase_char & charmask;
 296         }
 297
 298         if (depth != 1)
 299                 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
 300                         : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
 301
 302         switch (depth) {
 303         case 1:
 304         {
 305                 int col = mono_col(info);
 306                 /* 0 or 1 */
 307                 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
 308                 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
 309
 310                 if (console_blanked)
 311                         fg = bg;
 312
 313                 color = (is_fg) ? fg : bg;
 314                 break;
 315         }
 316         case 2:
 317                 /*
 318                  * Scale down 16-colors to 4 colors. Default 4-color palette
 319                  * is grayscale. However, simply dividing the values by 4
 320                  * will not work, as colors 1, 2 and 3 will be scaled-down
 321                  * to zero rendering them invisible.  So empirically convert
 322                  * colors to a sane 4-level grayscale.
 323                  */
 324                 switch (color) {
 325                 case 0:
 326                         color = 0; /* black */
 327                         break;
 328                 case 1 ... 6:
 329                         color = 2; /* white */
 330                         break;
 331                 case 7 ... 8:
 332                         color = 1; /* gray */
 333                         break;
 334                 default:
 335                         color = 3; /* intense white */
 336                         break;
 337                 }
 338                 break;
 339         case 3:
 340                 /*
 341                  * Last 8 entries of default 16-color palette is a more intense
 342                  * version of the first 8 (i.e., same chrominance, different
 343                  * luminance).
 344                  */
 345                 color &= 7;
 346                 break;
 347         }
 348
 349
 350         return color;
 351 }
 352
 353 static void fbcon_update_softback(struct vc_data *vc)
 354 {
 355         int l = fbcon_softback_size / vc->vc_size_row;
 356
 357         if (l > 5)
 358                 softback_end = softback_buf + l * vc->vc_size_row;
 359         else
 360                 /* Smaller scrollback makes no sense, and 0 would screw
 361                    the operation totally */
 362                 softback_top = 0;
 363 }
 364
 365 static void fb_flashcursor(struct work_struct *work)
 366 {
 367         struct fb_info *info = container_of(work, struct fb_info, queue);
 368         struct fbcon_ops *ops = info->fbcon_par;
 369         struct vc_data *vc = NULL;
 370         int c;
 371         int mode;
 372         int ret;
 373
 374         /* FIXME: we should sort out the unbind locking instead */
 375         /* instead we just fail to flash the cursor if we can't get
 376          * the lock instead of blocking fbcon deinit */
 377         ret = console_trylock();
 378         if (ret == 0)
 379                 return;
 380
 381         if (ops && ops->currcon != -1)
 382                 vc = vc_cons[ops->currcon].d;
 383
 384         if (!vc || !CON_IS_VISIBLE(vc) ||
 385             registered_fb[con2fb_map[vc->vc_num]] != info ||
 386             vc->vc_deccm != 1) {
 387                 console_unlock();
 388                 return;
 389         }
 390
 391         c = scr_readw((u16 *) vc->vc_pos);
 392         mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
 393                 CM_ERASE : CM_DRAW;
 394         ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
 395                     get_color(vc, info, c, 0));
 396         console_unlock();
 397 }
 398
 399 static void cursor_timer_handler(unsigned long dev_addr)
 400 {
 401         struct fb_info *info = (struct fb_info *) dev_addr;
 402         struct fbcon_ops *ops = info->fbcon_par;
 403
 404         queue_work(system_power_efficient_wq, &info->queue);
 405         mod_timer(&ops->cursor_timer, jiffies + ops->cur_blink_jiffies);
 406 }
 407
 408 static void fbcon_add_cursor_timer(struct fb_info *info)
 409 {
 410         struct fbcon_ops *ops = info->fbcon_par;
 411
 412         if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
 413             !(ops->flags & FBCON_FLAGS_CURSOR_TIMER) &&
 414             !fbcon_cursor_noblink) {
 415                 if (!info->queue.func)
 416                         INIT_WORK(&info->queue, fb_flashcursor);
 417
 418                 init_timer(&ops->cursor_timer);
 419                 ops->cursor_timer.function = cursor_timer_handler;
 420                 ops->cursor_timer.expires = jiffies + ops->cur_blink_jiffies;
 421                 ops->cursor_timer.data = (unsigned long ) info;
 422                 add_timer(&ops->cursor_timer);
 423                 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
 424         }
 425 }
 426
 427 static void fbcon_del_cursor_timer(struct fb_info *info)
 428 {
 429         struct fbcon_ops *ops = info->fbcon_par;
 430
 431         if (info->queue.func == fb_flashcursor &&
 432             ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
 433                 del_timer_sync(&ops->cursor_timer);
 434                 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
 435         }
 436 }
 437
 438 #ifndef MODULE
 439 static int __init fb_console_setup(char *this_opt)
 440 {
 441         char *options;
 442         int i, j;
 443
 444         if (!this_opt || !*this_opt)
 445                 return 1;
 446
 447         while ((options = strsep(&this_opt, ",")) != NULL) {
 448                 if (!strncmp(options, "font:", 5)) {
 449                         strlcpy(fontname, options + 5, sizeof(fontname));
 450                         continue;
 451                 }
 452
 453                 if (!strncmp(options, "scrollback:", 11)) {
 454                         options += 11;
 455                         if (*options) {
 456                                 fbcon_softback_size = simple_strtoul(options, &options, 0);
 457                                 if (*options == 'k' || *options == 'K') {
 458                                         fbcon_softback_size *= 1024;
 459                                 }
 460                         }
 461                         continue;
 462                 }
 463
 464                 if (!strncmp(options, "map:", 4)) {
 465                         options += 4;
 466                         if (*options) {
 467                                 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
 468                                         if (!options[j])
 469                                                 j = 0;
 470                                         con2fb_map_boot[i] =
 471                                                 (options[j++]-'0') % FB_MAX;
 472                                 }
 473
 474                                 fbcon_map_override();
 475                         }
 476                         continue;
 477                 }
 478
 479                 if (!strncmp(options, "vc:", 3)) {
 480                         options += 3;
 481                         if (*options)
 482                                 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
 483                         if (first_fb_vc < 0)
 484                                 first_fb_vc = 0;
 485                         if (*options++ == '-')
 486                                 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
 487                         fbcon_is_default = 0;
 488                         continue;
 489                 }
 490
 491                 if (!strncmp(options, "rotate:", 7)) {
 492                         options += 7;
 493                         if (*options)
 494                                 initial_rotation = simple_strtoul(options, &options, 0);
 495                         if (initial_rotation > 3)
 496                                 initial_rotation = 0;
 497                         continue;
 498                 }
 499         }
 500         return 1;
 501 }
 502
 503 __setup("fbcon=", fb_console_setup);
 504 #endif
 505
 506 static int search_fb_in_map(int idx)
 507 {
 508         int i, retval = 0;
 509
 510         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 511                 if (con2fb_map[i] == idx)
 512                         retval = 1;
 513         }
 514         return retval;
 515 }
 516
 517 static int search_for_mapped_con(void)
 518 {
 519         int i, retval = 0;
 520
 521         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 522                 if (con2fb_map[i] != -1)
 523                         retval = 1;
 524         }
 525         return retval;
 526 }
 527
 528 static int do_fbcon_takeover(int show_logo)
 529 {
 530         int err, i;
 531
 532         if (!num_registered_fb)
 533                 return -ENODEV;
 534
 535         if (!show_logo)
 536                 logo_shown = FBCON_LOGO_DONTSHOW;
 537
 538         for (i = first_fb_vc; i <= last_fb_vc; i++)
 539                 con2fb_map[i] = info_idx;
 540
 541         err = do_take_over_console(&fb_con, first_fb_vc, last_fb_vc,
 542                                 fbcon_is_default);
 543
 544         if (err) {
 545                 for (i = first_fb_vc; i <= last_fb_vc; i++)
 546                         con2fb_map[i] = -1;
 547                 info_idx = -1;
 548         } else {
 549                 fbcon_has_console_bind = 1;
 550         }
 551
 552         return err;
 553 }
 554
 555 #ifdef MODULE
 556 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
 557                                int cols, int rows, int new_cols, int new_rows)
 558 {
 559         logo_shown = FBCON_LOGO_DONTSHOW;
 560 }
 561 #else
 562 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
 563                                int cols, int rows, int new_cols, int new_rows)
 564 {
 565         /* Need to make room for the logo */
 566         struct fbcon_ops *ops = info->fbcon_par;
 567         int cnt, erase = vc->vc_video_erase_char, step;
 568         unsigned short *save = NULL, *r, *q;
 569         int logo_height;
 570
 571         if (info->flags & FBINFO_MODULE) {
 572                 logo_shown = FBCON_LOGO_DONTSHOW;
 573                 return;
 574         }
 575
 576         /*
 577          * remove underline attribute from erase character
 578          * if black and white framebuffer.
 579          */
 580         if (fb_get_color_depth(&info->var, &info->fix) == 1)
 581                 erase &= ~0x400;
 582         logo_height = fb_prepare_logo(info, ops->rotate);
 583         logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height);
 584         q = (unsigned short *) (vc->vc_origin +
 585                                 vc->vc_size_row * rows);
 586         step = logo_lines * cols;
 587         for (r = q - logo_lines * cols; r < q; r++)
 588                 if (scr_readw(r) != vc->vc_video_erase_char)
 589                         break;
 590         if (r != q && new_rows >= rows + logo_lines) {
 591                 save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
 592                 if (save) {
 593                         int i = cols < new_cols ? cols : new_cols;
 594                         scr_memsetw(save, erase, logo_lines * new_cols * 2);
 595                         r = q - step;
 596                         for (cnt = 0; cnt < logo_lines; cnt++, r += i)
 597                                 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
 598                         r = q;
 599                 }
 600         }
 601         if (r == q) {
 602                 /* We can scroll screen down */
 603                 r = q - step - cols;
 604                 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
 605                         scr_memcpyw(r + step, r, vc->vc_size_row);
 606                         r -= cols;
 607                 }
 608                 if (!save) {
 609                         int lines;
 610                         if (vc->vc_y + logo_lines >= rows)
 611                                 lines = rows - vc->vc_y - 1;
 612                         else
 613                                 lines = logo_lines;
 614                         vc->vc_y += lines;
 615                         vc->vc_pos += lines * vc->vc_size_row;
 616                 }
 617         }
 618         scr_memsetw((unsigned short *) vc->vc_origin,
 619                     erase,
 620                     vc->vc_size_row * logo_lines);
 621
 622         if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
 623                 fbcon_clear_margins(vc, 0);
 624                 update_screen(vc);
 625         }
 626
 627         if (save) {
 628                 q = (unsigned short *) (vc->vc_origin +
 629                                         vc->vc_size_row *
 630                                         rows);
 631                 scr_memcpyw(q, save, logo_lines * new_cols * 2);
 632                 vc->vc_y += logo_lines;
 633                 vc->vc_pos += logo_lines * vc->vc_size_row;
 634                 kfree(save);
 635         }
 636
 637         if (logo_lines > vc->vc_bottom) {
 638                 logo_shown = FBCON_LOGO_CANSHOW;
 639                 printk(KERN_INFO
 640                        "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
 641         } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
 642                 logo_shown = FBCON_LOGO_DRAW;
 643                 vc->vc_top = logo_lines;
 644         }
 645 }
 646 #endif /* MODULE */
 647
 648 #ifdef CONFIG_FB_TILEBLITTING
 649 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
 650 {
 651         struct fbcon_ops *ops = info->fbcon_par;
 652
 653         ops->p = &fb_display[vc->vc_num];
 654
 655         if ((info->flags & FBINFO_MISC_TILEBLITTING))
 656                 fbcon_set_tileops(vc, info);
 657         else {
 658                 fbcon_set_rotation(info);
 659                 fbcon_set_bitops(ops);
 660         }
 661 }
 662
 663 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
 664 {
 665         int err = 0;
 666
 667         if (info->flags & FBINFO_MISC_TILEBLITTING &&
 668             info->tileops->fb_get_tilemax(info) < charcount)
 669                 err = 1;
 670
 671         return err;
 672 }
 673 #else
 674 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
 675 {
 676         struct fbcon_ops *ops = info->fbcon_par;
 677
 678         info->flags &= ~FBINFO_MISC_TILEBLITTING;
 679         ops->p = &fb_display[vc->vc_num];
 680         fbcon_set_rotation(info);
 681         fbcon_set_bitops(ops);
 682 }
 683
 684 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
 685 {
 686         return 0;
 687 }
 688
 689 #endif /* CONFIG_MISC_TILEBLITTING */
 690
 691
 692 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
 693                                   int unit, int oldidx)
 694 {
 695         struct fbcon_ops *ops = NULL;
 696         int err = 0;
 697
 698         if (!try_module_get(info->fbops->owner))
 699                 err = -ENODEV;
 700
 701         if (!err && info->fbops->fb_open &&
 702             info->fbops->fb_open(info, 0))
 703                 err = -ENODEV;
 704
 705         if (!err) {
 706                 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
 707                 if (!ops)
 708                         err = -ENOMEM;
 709         }
 710
 711         if (!err) {
 712                 ops->cur_blink_jiffies = HZ / 5;
 713                 info->fbcon_par = ops;
 714
 715                 if (vc)
 716                         set_blitting_type(vc, info);
 717         }
 718
 719         if (err) {
 720                 con2fb_map[unit] = oldidx;
 721                 module_put(info->fbops->owner);
 722         }
 723
 724         return err;
 725 }
 726
 727 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
 728                                   struct fb_info *newinfo, int unit,
 729                                   int oldidx, int found)
 730 {
 731         struct fbcon_ops *ops = oldinfo->fbcon_par;
 732         int err = 0, ret;
 733
 734         if (oldinfo->fbops->fb_release &&
 735             oldinfo->fbops->fb_release(oldinfo, 0)) {
 736                 con2fb_map[unit] = oldidx;
 737                 if (!found && newinfo->fbops->fb_release)
 738                         newinfo->fbops->fb_release(newinfo, 0);
 739                 if (!found)
 740                         module_put(newinfo->fbops->owner);
 741                 err = -ENODEV;
 742         }
 743
 744         if (!err) {
 745                 fbcon_del_cursor_timer(oldinfo);
 746                 kfree(ops->cursor_state.mask);
 747                 kfree(ops->cursor_data);
 748                 kfree(ops->cursor_src);
 749                 kfree(ops->fontbuffer);
 750                 kfree(oldinfo->fbcon_par);
 751                 oldinfo->fbcon_par = NULL;
 752                 module_put(oldinfo->fbops->owner);
 753                 /*
 754                   If oldinfo and newinfo are driving the same hardware,
 755                   the fb_release() method of oldinfo may attempt to
 756                   restore the hardware state.  This will leave the
 757                   newinfo in an undefined state. Thus, a call to
 758                   fb_set_par() may be needed for the newinfo.
 759                 */
 760                 if (newinfo && newinfo->fbops->fb_set_par) {
 761                         ret = newinfo->fbops->fb_set_par(newinfo);
 762
 763                         if (ret)
 764                                 printk(KERN_ERR "con2fb_release_oldinfo: "
 765                                         "detected unhandled fb_set_par error, "
 766                                         "error code %d\n", ret);
 767                 }
 768         }
 769
 770         return err;
 771 }
 772
 773 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
 774                                 int unit, int show_logo)
 775 {
 776         struct fbcon_ops *ops = info->fbcon_par;
 777         int ret;
 778
 779         ops->currcon = fg_console;
 780
 781         if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT)) {
 782                 ret = info->fbops->fb_set_par(info);
 783
 784                 if (ret)
 785                         printk(KERN_ERR "con2fb_init_display: detected "
 786                                 "unhandled fb_set_par error, "
 787                                 "error code %d\n", ret);
 788         }
 789
 790         ops->flags |= FBCON_FLAGS_INIT;
 791         ops->graphics = 0;
 792         fbcon_set_disp(info, &info->var, unit);
 793
 794         if (show_logo) {
 795                 struct vc_data *fg_vc = vc_cons[fg_console].d;
 796                 struct fb_info *fg_info =
 797                         registered_fb[con2fb_map[fg_console]];
 798
 799                 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
 800                                    fg_vc->vc_rows, fg_vc->vc_cols,
 801                                    fg_vc->vc_rows);
 802         }
 803
 804         update_screen(vc_cons[fg_console].d);
 805 }
 806
 807 /**
 808  *      set_con2fb_map - map console to frame buffer device
 809  *      @unit: virtual console number to map
 810  *      @newidx: frame buffer index to map virtual console to
 811  *      @user: user request
 812  *
 813  *      Maps a virtual console @unit to a frame buffer device
 814  *      @newidx.
 815  *
 816  *      This should be called with the console lock held.
 817  */
 818 static int set_con2fb_map(int unit, int newidx, int user)
 819 {
 820         struct vc_data *vc = vc_cons[unit].d;
 821         int oldidx = con2fb_map[unit];
 822         struct fb_info *info = registered_fb[newidx];
 823         struct fb_info *oldinfo = NULL;
 824         int found, err = 0;
 825
 826         if (oldidx == newidx)
 827                 return 0;
 828
 829         if (!info)
 830                 return -EINVAL;
 831
 832         if (!search_for_mapped_con() || !con_is_bound(&fb_con)) {
 833                 info_idx = newidx;
 834                 return do_fbcon_takeover(0);
 835         }
 836
 837         if (oldidx != -1)
 838                 oldinfo = registered_fb[oldidx];
 839
 840         found = search_fb_in_map(newidx);
 841
 842         con2fb_map[unit] = newidx;
 843         if (!err && !found)
 844                 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
 845
 846
 847         /*
 848          * If old fb is not mapped to any of the consoles,
 849          * fbcon should release it.
 850          */
 851         if (!err && oldinfo && !search_fb_in_map(oldidx))
 852                 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
 853                                              found);
 854
 855         if (!err) {
 856                 int show_logo = (fg_console == 0 && !user &&
 857                                  logo_shown != FBCON_LOGO_DONTSHOW);
 858
 859                 if (!found)
 860                         fbcon_add_cursor_timer(info);
 861                 con2fb_map_boot[unit] = newidx;
 862                 con2fb_init_display(vc, info, unit, show_logo);
 863         }
 864
 865         if (!search_fb_in_map(info_idx))
 866                 info_idx = newidx;
 867
 868         return err;
 869 }
 870
 871 /*
 872  *  Low Level Operations
 873  */
 874 /* NOTE: fbcon cannot be __init: it may be called from do_take_over_console later */
 875 static int var_to_display(struct display *disp,
 876                           struct fb_var_screeninfo *var,
 877                           struct fb_info *info)
 878 {
 879         disp->xres_virtual = var->xres_virtual;
 880         disp->yres_virtual = var->yres_virtual;
 881         disp->bits_per_pixel = var->bits_per_pixel;
 882         disp->grayscale = var->grayscale;
 883         disp->nonstd = var->nonstd;
 884         disp->accel_flags = var->accel_flags;
 885         disp->height = var->height;
 886         disp->width = var->width;
 887         disp->red = var->red;
 888         disp->green = var->green;
 889         disp->blue = var->blue;
 890         disp->transp = var->transp;
 891         disp->rotate = var->rotate;
 892         disp->mode = fb_match_mode(var, &info->modelist);
 893         if (disp->mode == NULL)
 894                 /* This should not happen */
 895                 return -EINVAL;
 896         return 0;
 897 }
 898
 899 static void display_to_var(struct fb_var_screeninfo *var,
 900                            struct display *disp)
 901 {
 902         fb_videomode_to_var(var, disp->mode);
 903         var->xres_virtual = disp->xres_virtual;
 904         var->yres_virtual = disp->yres_virtual;
 905         var->bits_per_pixel = disp->bits_per_pixel;
 906         var->grayscale = disp->grayscale;
 907         var->nonstd = disp->nonstd;
 908         var->accel_flags = disp->accel_flags;
 909         var->height = disp->height;
 910         var->width = disp->width;
 911         var->red = disp->red;
 912         var->green = disp->green;
 913         var->blue = disp->blue;
 914         var->transp = disp->transp;
 915         var->rotate = disp->rotate;
 916 }
 917
 918 static const char *fbcon_startup(void)
 919 {
 920         const char *display_desc = "frame buffer device";
 921         struct display *p = &fb_display[fg_console];
 922         struct vc_data *vc = vc_cons[fg_console].d;
 923         const struct font_desc *font = NULL;
 924         struct module *owner;
 925         struct fb_info *info = NULL;
 926         struct fbcon_ops *ops;
 927         int rows, cols;
 928
 929         /*
 930          *  If num_registered_fb is zero, this is a call for the dummy part.
 931          *  The frame buffer devices weren't initialized yet.
 932          */
 933         if (!num_registered_fb || info_idx == -1)
 934                 return display_desc;
 935         /*
 936          * Instead of blindly using registered_fb[0], we use info_idx, set by
 937          * fb_console_init();
 938          */
 939         info = registered_fb[info_idx];
 940         if (!info)
 941                 return NULL;
 942
 943         owner = info->fbops->owner;
 944         if (!try_module_get(owner))
 945                 return NULL;
 946         if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
 947                 module_put(owner);
 948                 return NULL;
 949         }
 950
 951         ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
 952         if (!ops) {
 953                 module_put(owner);
 954                 return NULL;
 955         }
 956
 957         ops->currcon = -1;
 958         ops->graphics = 1;
 959         ops->cur_rotate = -1;
 960         ops->cur_blink_jiffies = HZ / 5;
 961         info->fbcon_par = ops;
 962         p->con_rotate = initial_rotation;
 963         set_blitting_type(vc, info);
 964
 965         if (info->fix.type != FB_TYPE_TEXT) {
 966                 if (fbcon_softback_size) {
 967                         if (!softback_buf) {
 968                                 softback_buf =
 969                                     (unsigned long)
 970                                     kmalloc(fbcon_softback_size,
 971                                             GFP_KERNEL);
 972                                 if (!softback_buf) {
 973                                         fbcon_softback_size = 0;
 974                                         softback_top = 0;
 975                                 }
 976                         }
 977                 } else {
 978                         if (softback_buf) {
 979                                 kfree((void *) softback_buf);
 980                                 softback_buf = 0;
 981                                 softback_top = 0;
 982                         }
 983                 }
 984                 if (softback_buf)
 985                         softback_in = softback_top = softback_curr =
 986                             softback_buf;
 987                 softback_lines = 0;
 988         }
 989
 990         /* Setup default font */
 991         if (!p->fontdata && !vc->vc_font.data) {
 992                 if (!fontname[0] || !(font = find_font(fontname)))
 993                         font = get_default_font(info->var.xres,
 994                                                 info->var.yres,
 995                                                 info->pixmap.blit_x,
 996                                                 info->pixmap.blit_y);
 997                 vc->vc_font.width = font->width;
 998                 vc->vc_font.height = font->height;
 999                 vc->vc_font.data = (void *)(p->fontdata = font->data);
1000                 vc->vc_font.charcount = 256; /* FIXME  Need to support more fonts */
1001         } else {
1002                 p->fontdata = vc->vc_font.data;
1003         }
1004
1005         cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1006         rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1007         cols /= vc->vc_font.width;
1008         rows /= vc->vc_font.height;
1009         vc_resize(vc, cols, rows);
1010
1011         DPRINTK("mode:   %s\n", info->fix.id);
1012         DPRINTK("visual: %d\n", info->fix.visual);
1013         DPRINTK("res:    %dx%d-%d\n", info->var.xres,
1014                 info->var.yres,
1015                 info->var.bits_per_pixel);
1016
1017         fbcon_add_cursor_timer(info);
1018         fbcon_has_exited = 0;
1019         return display_desc;
1020 }
1021
1022 static void fbcon_init(struct vc_data *vc, int init)
1023 {
1024         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1025         struct fbcon_ops *ops;
1026         struct vc_data **default_mode = vc->vc_display_fg;
1027         struct vc_data *svc = *default_mode;
1028         struct display *t, *p = &fb_display[vc->vc_num];
1029         int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
1030         int cap, ret;
1031
1032         if (info_idx == -1 || info == NULL)
1033             return;
1034
1035         cap = info->flags;
1036
1037         if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1038             (info->fix.type == FB_TYPE_TEXT))
1039                 logo = 0;
1040
1041         if (var_to_display(p, &info->var, info))
1042                 return;
1043
1044         if (!info->fbcon_par)
1045                 con2fb_acquire_newinfo(vc, info, vc->vc_num, -1);
1046
1047         /* If we are not the first console on this
1048            fb, copy the font from that console */
1049         t = &fb_display[fg_console];
1050         if (!p->fontdata) {
1051                 if (t->fontdata) {
1052                         struct vc_data *fvc = vc_cons[fg_console].d;
1053
1054                         vc->vc_font.data = (void *)(p->fontdata =
1055                                                     fvc->vc_font.data);
1056                         vc->vc_font.width = fvc->vc_font.width;
1057                         vc->vc_font.height = fvc->vc_font.height;
1058                         p->userfont = t->userfont;
1059
1060                         if (p->userfont)
1061                                 REFCOUNT(p->fontdata)++;
1062                 } else {
1063                         const struct font_desc *font = NULL;
1064
1065                         if (!fontname[0] || !(font = find_font(fontname)))
1066                                 font = get_default_font(info->var.xres,
1067                                                         info->var.yres,
1068                                                         info->pixmap.blit_x,
1069                                                         info->pixmap.blit_y);
1070                         vc->vc_font.width = font->width;
1071                         vc->vc_font.height = font->height;
1072                         vc->vc_font.data = (void *)(p->fontdata = font->data);
1073                         vc->vc_font.charcount = 256; /* FIXME  Need to
1074                                                         support more fonts */
1075                 }
1076         }
1077
1078         if (p->userfont)
1079                 charcnt = FNTCHARCNT(p->fontdata);
1080
1081         vc->vc_panic_force_write = !!(info->flags & FBINFO_CAN_FORCE_OUTPUT);
1082         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1083         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1084         if (charcnt == 256) {
1085                 vc->vc_hi_font_mask = 0;
1086         } else {
1087                 vc->vc_hi_font_mask = 0x100;
1088                 if (vc->vc_can_do_color)
1089                         vc->vc_complement_mask <<= 1;
1090         }
1091
1092         if (!*svc->vc_uni_pagedir_loc)
1093                 con_set_default_unimap(svc);
1094         if (!*vc->vc_uni_pagedir_loc)
1095                 con_copy_unimap(vc, svc);
1096
1097         ops = info->fbcon_par;
1098         ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
1099         p->con_rotate = initial_rotation;
1100         set_blitting_type(vc, info);
1101
1102         cols = vc->vc_cols;
1103         rows = vc->vc_rows;
1104         new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1105         new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1106         new_cols /= vc->vc_font.width;
1107         new_rows /= vc->vc_font.height;
1108
1109         /*
1110          * We must always set the mode. The mode of the previous console
1111          * driver could be in the same resolution but we are using different
1112          * hardware so we have to initialize the hardware.
1113          *
1114          * We need to do it in fbcon_init() to prevent screen corruption.
1115          */
1116         if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
1117                 if (info->fbops->fb_set_par &&
1118                     !(ops->flags & FBCON_FLAGS_INIT)) {
1119                         ret = info->fbops->fb_set_par(info);
1120
1121                         if (ret)
1122                                 printk(KERN_ERR "fbcon_init: detected "
1123                                         "unhandled fb_set_par error, "
1124                                         "error code %d\n", ret);
1125                 }
1126
1127                 ops->flags |= FBCON_FLAGS_INIT;
1128         }
1129
1130         ops->graphics = 0;
1131
1132         if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1133             !(cap & FBINFO_HWACCEL_DISABLED))
1134                 p->scrollmode = SCROLL_MOVE;
1135         else /* default to something safe */
1136                 p->scrollmode = SCROLL_REDRAW;
1137
1138         /*
1139          *  ++guenther: console.c:vc_allocate() relies on initializing
1140          *  vc_{cols,rows}, but we must not set those if we are only
1141          *  resizing the console.
1142          */
1143         if (init) {
1144                 vc->vc_cols = new_cols;
1145                 vc->vc_rows = new_rows;
1146         } else
1147                 vc_resize(vc, new_cols, new_rows);
1148
1149         if (logo)
1150                 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1151
1152         if (vc == svc && softback_buf)
1153                 fbcon_update_softback(vc);
1154
1155         if (ops->rotate_font && ops->rotate_font(info, vc)) {
1156                 ops->rotate = FB_ROTATE_UR;
1157                 set_blitting_type(vc, info);
1158         }
1159
1160         ops->p = &fb_display[fg_console];
1161 }
1162
1163 static void fbcon_free_font(struct display *p, bool freefont)
1164 {
1165         if (freefont && p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1166                 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1167         p->fontdata = NULL;
1168         p->userfont = 0;
1169 }
1170
1171 static void fbcon_deinit(struct vc_data *vc)
1172 {
1173         struct display *p = &fb_display[vc->vc_num];
1174         struct fb_info *info;
1175         struct fbcon_ops *ops;
1176         int idx;
1177         bool free_font = true;
1178
1179         idx = con2fb_map[vc->vc_num];
1180
1181         if (idx == -1)
1182                 goto finished;
1183
1184         info = registered_fb[idx];
1185
1186         if (!info)
1187                 goto finished;
1188
1189         if (info->flags & FBINFO_MISC_FIRMWARE)
1190                 free_font = false;
1191         ops = info->fbcon_par;
1192
1193         if (!ops)
1194                 goto finished;
1195
1196         if (CON_IS_VISIBLE(vc))
1197                 fbcon_del_cursor_timer(info);
1198
1199         ops->flags &= ~FBCON_FLAGS_INIT;
1200 finished:
1201
1202         fbcon_free_font(p, free_font);
1203         if (free_font)
1204                 vc->vc_font.data = NULL;
1205
1206         if (!con_is_bound(&fb_con))
1207                 fbcon_exit();
1208
1209         return;
1210 }
1211
1212 /* ====================================================================== */
1213
1214 /*  fbcon_XXX routines - interface used by the world
1215  *
1216  *  This system is now divided into two levels because of complications
1217  *  caused by hardware scrolling. Top level functions:
1218  *
1219  *      fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1220  *
1221  *  handles y values in range [0, scr_height-1] that correspond to real
1222  *  screen positions. y_wrap shift means that first line of bitmap may be
1223  *  anywhere on this display. These functions convert lineoffsets to
1224  *  bitmap offsets and deal with the wrap-around case by splitting blits.
1225  *
1226  *      fbcon_bmove_physical_8()    -- These functions fast implementations
1227  *      fbcon_clear_physical_8()    -- of original fbcon_XXX fns.
1228  *      fbcon_putc_physical_8()     -- (font width != 8) may be added later
1229  *
1230  *  WARNING:
1231  *
1232  *  At the moment fbcon_putc() cannot blit across vertical wrap boundary
1233  *  Implies should only really hardware scroll in rows. Only reason for
1234  *  restriction is simplicity & efficiency at the moment.
1235  */
1236
1237 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1238                         int width)
1239 {
1240         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1241         struct fbcon_ops *ops = info->fbcon_par;
1242
1243         struct display *p = &fb_display[vc->vc_num];
1244         u_int y_break;
1245
1246         if (fbcon_is_inactive(vc, info))
1247                 return;
1248
1249         if (!height || !width)
1250                 return;
1251
1252         if (sy < vc->vc_top && vc->vc_top == logo_lines) {
1253                 vc->vc_top = 0;
1254                 /*
1255                  * If the font dimensions are not an integral of the display
1256                  * dimensions then the ops->clear below won't end up clearing
1257                  * the margins.  Call clear_margins here in case the logo
1258                  * bitmap stretched into the margin area.
1259                  */
1260                 fbcon_clear_margins(vc, 0);
1261         }
1262
1263         /* Split blits that cross physical y_wrap boundary */
1264
1265         y_break = p->vrows - p->yscroll;
1266         if (sy < y_break && sy + height - 1 >= y_break) {
1267                 u_int b = y_break - sy;
1268                 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1269                 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1270                                  width);
1271         } else
1272                 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1273 }
1274
1275 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1276                         int count, int ypos, int xpos)
1277 {
1278         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1279         struct display *p = &fb_display[vc->vc_num];
1280         struct fbcon_ops *ops = info->fbcon_par;
1281
1282         if (!fbcon_is_inactive(vc, info))
1283                 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1284                            get_color(vc, info, scr_readw(s), 1),
1285                            get_color(vc, info, scr_readw(s), 0));
1286 }
1287
1288 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1289 {
1290         unsigned short chr;
1291
1292         scr_writew(c, &chr);
1293         fbcon_putcs(vc, &chr, 1, ypos, xpos);
1294 }
1295
1296 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1297 {
1298         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1299         struct fbcon_ops *ops = info->fbcon_par;
1300
1301         if (!fbcon_is_inactive(vc, info))
1302                 ops->clear_margins(vc, info, bottom_only);
1303 }
1304
1305 static void fbcon_cursor(struct vc_data *vc, int mode)
1306 {
1307         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1308         struct fbcon_ops *ops = info->fbcon_par;
1309         int y;
1310         int c = scr_readw((u16 *) vc->vc_pos);
1311
1312         ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
1313
1314         if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
1315                 return;
1316
1317         if (vc->vc_cursor_type & 0x10)
1318                 fbcon_del_cursor_timer(info);
1319         else
1320                 fbcon_add_cursor_timer(info);
1321
1322         ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1323         if (mode & CM_SOFTBACK) {
1324                 mode &= ~CM_SOFTBACK;
1325                 y = softback_lines;
1326         } else {
1327                 if (softback_lines)
1328                         fbcon_set_origin(vc);
1329                 y = 0;
1330         }
1331
1332         ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
1333                     get_color(vc, info, c, 0));
1334 }
1335
1336 static int scrollback_phys_max = 0;
1337 static int scrollback_max = 0;
1338 static int scrollback_current = 0;
1339
1340 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1341                            int unit)
1342 {
1343         struct display *p, *t;
1344         struct vc_data **default_mode, *vc;
1345         struct vc_data *svc;
1346         struct fbcon_ops *ops = info->fbcon_par;
1347         int rows, cols, charcnt = 256;
1348
1349         p = &fb_display[unit];
1350
1351         if (var_to_display(p, var, info))
1352                 return;
1353
1354         vc = vc_cons[unit].d;
1355
1356         if (!vc)
1357                 return;
1358
1359         default_mode = vc->vc_display_fg;
1360         svc = *default_mode;
1361         t = &fb_display[svc->vc_num];
1362
1363         if (!vc->vc_font.data) {
1364                 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1365                 vc->vc_font.width = (*default_mode)->vc_font.width;
1366                 vc->vc_font.height = (*default_mode)->vc_font.height;
1367                 p->userfont = t->userfont;
1368                 if (p->userfont)
1369                         REFCOUNT(p->fontdata)++;
1370         }
1371         if (p->userfont)
1372                 charcnt = FNTCHARCNT(p->fontdata);
1373
1374         var->activate = FB_ACTIVATE_NOW;
1375         info->var.activate = var->activate;
1376         var->yoffset = info->var.yoffset;
1377         var->xoffset = info->var.xoffset;
1378         fb_set_var(info, var);
1379         ops->var = info->var;
1380         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1381         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1382         if (charcnt == 256) {
1383                 vc->vc_hi_font_mask = 0;
1384         } else {
1385                 vc->vc_hi_font_mask = 0x100;
1386                 if (vc->vc_can_do_color)
1387                         vc->vc_complement_mask <<= 1;
1388         }
1389
1390         if (!*svc->vc_uni_pagedir_loc)
1391                 con_set_default_unimap(svc);
1392         if (!*vc->vc_uni_pagedir_loc)
1393                 con_copy_unimap(vc, svc);
1394
1395         cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1396         rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1397         cols /= vc->vc_font.width;
1398         rows /= vc->vc_font.height;
1399         vc_resize(vc, cols, rows);
1400
1401         if (CON_IS_VISIBLE(vc)) {
1402                 update_screen(vc);
1403                 if (softback_buf)
1404                         fbcon_update_softback(vc);
1405         }
1406 }
1407
1408 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1409 {
1410         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1411         struct fbcon_ops *ops = info->fbcon_par;
1412         struct display *p = &fb_display[vc->vc_num];
1413
1414         p->yscroll += count;
1415         if (p->yscroll >= p->vrows)     /* Deal with wrap */
1416                 p->yscroll -= p->vrows;
1417         ops->var.xoffset = 0;
1418         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1419         ops->var.vmode |= FB_VMODE_YWRAP;
1420         ops->update_start(info);
1421         scrollback_max += count;
1422         if (scrollback_max > scrollback_phys_max)
1423                 scrollback_max = scrollback_phys_max;
1424         scrollback_current = 0;
1425 }
1426
1427 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1428 {
1429         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1430         struct fbcon_ops *ops = info->fbcon_par;
1431         struct display *p = &fb_display[vc->vc_num];
1432
1433         p->yscroll -= count;
1434         if (p->yscroll < 0)     /* Deal with wrap */
1435                 p->yscroll += p->vrows;
1436         ops->var.xoffset = 0;
1437         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1438         ops->var.vmode |= FB_VMODE_YWRAP;
1439         ops->update_start(info);
1440         scrollback_max -= count;
1441         if (scrollback_max < 0)
1442                 scrollback_max = 0;
1443         scrollback_current = 0;
1444 }
1445
1446 static __inline__ void ypan_up(struct vc_data *vc, int count)
1447 {
1448         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1449         struct display *p = &fb_display[vc->vc_num];
1450         struct fbcon_ops *ops = info->fbcon_par;
1451
1452         p->yscroll += count;
1453         if (p->yscroll > p->vrows - vc->vc_rows) {
1454                 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1455                             0, 0, 0, vc->vc_rows, vc->vc_cols);
1456                 p->yscroll -= p->vrows - vc->vc_rows;
1457         }
1458
1459         ops->var.xoffset = 0;
1460         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1461         ops->var.vmode &= ~FB_VMODE_YWRAP;
1462         ops->update_start(info);
1463         fbcon_clear_margins(vc, 1);
1464         scrollback_max += count;
1465         if (scrollback_max > scrollback_phys_max)
1466                 scrollback_max = scrollback_phys_max;
1467         scrollback_current = 0;
1468 }
1469
1470 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1471 {
1472         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1473         struct fbcon_ops *ops = info->fbcon_par;
1474         struct display *p = &fb_display[vc->vc_num];
1475
1476         p->yscroll += count;
1477
1478         if (p->yscroll > p->vrows - vc->vc_rows) {
1479                 p->yscroll -= p->vrows - vc->vc_rows;
1480                 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1481         }
1482
1483         ops->var.xoffset = 0;
1484         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1485         ops->var.vmode &= ~FB_VMODE_YWRAP;
1486         ops->update_start(info);
1487         fbcon_clear_margins(vc, 1);
1488         scrollback_max += count;
1489         if (scrollback_max > scrollback_phys_max)
1490                 scrollback_max = scrollback_phys_max;
1491         scrollback_current = 0;
1492 }
1493
1494 static __inline__ void ypan_down(struct vc_data *vc, int count)
1495 {
1496         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1497         struct display *p = &fb_display[vc->vc_num];
1498         struct fbcon_ops *ops = info->fbcon_par;
1499
1500         p->yscroll -= count;
1501         if (p->yscroll < 0) {
1502                 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1503                             0, vc->vc_rows, vc->vc_cols);
1504                 p->yscroll += p->vrows - vc->vc_rows;
1505         }
1506
1507         ops->var.xoffset = 0;
1508         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1509         ops->var.vmode &= ~FB_VMODE_YWRAP;
1510         ops->update_start(info);
1511         fbcon_clear_margins(vc, 1);
1512         scrollback_max -= count;
1513         if (scrollback_max < 0)
1514                 scrollback_max = 0;
1515         scrollback_current = 0;
1516 }
1517
1518 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1519 {
1520         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1521         struct fbcon_ops *ops = info->fbcon_par;
1522         struct display *p = &fb_display[vc->vc_num];
1523
1524         p->yscroll -= count;
1525
1526         if (p->yscroll < 0) {
1527                 p->yscroll += p->vrows - vc->vc_rows;
1528                 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1529         }
1530
1531         ops->var.xoffset = 0;
1532         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1533         ops->var.vmode &= ~FB_VMODE_YWRAP;
1534         ops->update_start(info);
1535         fbcon_clear_margins(vc, 1);
1536         scrollback_max -= count;
1537         if (scrollback_max < 0)
1538                 scrollback_max = 0;
1539         scrollback_current = 0;
1540 }
1541
1542 static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1543                                   long delta)
1544 {
1545         int count = vc->vc_rows;
1546         unsigned short *d, *s;
1547         unsigned long n;
1548         int line = 0;
1549
1550         d = (u16 *) softback_curr;
1551         if (d == (u16 *) softback_in)
1552                 d = (u16 *) vc->vc_origin;
1553         n = softback_curr + delta * vc->vc_size_row;
1554         softback_lines -= delta;
1555         if (delta < 0) {
1556                 if (softback_curr < softback_top && n < softback_buf) {
1557                         n += softback_end - softback_buf;
1558                         if (n < softback_top) {
1559                                 softback_lines -=
1560                                     (softback_top - n) / vc->vc_size_row;
1561                                 n = softback_top;
1562                         }
1563                 } else if (softback_curr >= softback_top
1564                            && n < softback_top) {
1565                         softback_lines -=
1566                             (softback_top - n) / vc->vc_size_row;
1567                         n = softback_top;
1568                 }
1569         } else {
1570                 if (softback_curr > softback_in && n >= softback_end) {
1571                         n += softback_buf - softback_end;
1572                         if (n > softback_in) {
1573                                 n = softback_in;
1574                                 softback_lines = 0;
1575                         }
1576                 } else if (softback_curr <= softback_in && n > softback_in) {
1577                         n = softback_in;
1578                         softback_lines = 0;
1579                 }
1580         }
1581         if (n == softback_curr)
1582                 return;
1583         softback_curr = n;
1584         s = (u16 *) softback_curr;
1585         if (s == (u16 *) softback_in)
1586                 s = (u16 *) vc->vc_origin;
1587         while (count--) {
1588                 unsigned short *start;
1589                 unsigned short *le;
1590                 unsigned short c;
1591                 int x = 0;
1592                 unsigned short attr = 1;
1593
1594                 start = s;
1595                 le = advance_row(s, 1);
1596                 do {
1597                         c = scr_readw(s);
1598                         if (attr != (c & 0xff00)) {
1599                                 attr = c & 0xff00;
1600                                 if (s > start) {
1601                                         fbcon_putcs(vc, start, s - start,
1602                                                     line, x);
1603                                         x += s - start;
1604                                         start = s;
1605                                 }
1606                         }
1607                         if (c == scr_readw(d)) {
1608                                 if (s > start) {
1609                                         fbcon_putcs(vc, start, s - start,
1610                                                     line, x);
1611                                         x += s - start + 1;
1612                                         start = s + 1;
1613                                 } else {
1614                                         x++;
1615                                         start++;
1616                                 }
1617                         }
1618                         s++;
1619                         d++;
1620                 } while (s < le);
1621                 if (s > start)
1622                         fbcon_putcs(vc, start, s - start, line, x);
1623                 line++;
1624                 if (d == (u16 *) softback_end)
1625                         d = (u16 *) softback_buf;
1626                 if (d == (u16 *) softback_in)
1627                         d = (u16 *) vc->vc_origin;
1628                 if (s == (u16 *) softback_end)
1629                         s = (u16 *) softback_buf;
1630                 if (s == (u16 *) softback_in)
1631                         s = (u16 *) vc->vc_origin;
1632         }
1633 }
1634
1635 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1636                               int line, int count, int dy)
1637 {
1638         unsigned short *s = (unsigned short *)
1639                 (vc->vc_origin + vc->vc_size_row * line);
1640
1641         while (count--) {
1642                 unsigned short *start = s;
1643                 unsigned short *le = advance_row(s, 1);
1644                 unsigned short c;
1645                 int x = 0;
1646                 unsigned short attr = 1;
1647
1648                 do {
1649                         c = scr_readw(s);
1650                         if (attr != (c & 0xff00)) {
1651                                 attr = c & 0xff00;
1652                                 if (s > start) {
1653                                         fbcon_putcs(vc, start, s - start,
1654                                                     dy, x);
1655                                         x += s - start;
1656                                         start = s;
1657                                 }
1658                         }
1659                         console_conditional_schedule();
1660                         s++;
1661                 } while (s < le);
1662                 if (s > start)
1663                         fbcon_putcs(vc, start, s - start, dy, x);
1664                 console_conditional_schedule();
1665                 dy++;
1666         }
1667 }
1668
1669 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
1670                         struct display *p, int line, int count, int ycount)
1671 {
1672         int offset = ycount * vc->vc_cols;
1673         unsigned short *d = (unsigned short *)
1674             (vc->vc_origin + vc->vc_size_row * line);
1675         unsigned short *s = d + offset;
1676         struct fbcon_ops *ops = info->fbcon_par;
1677
1678         while (count--) {
1679                 unsigned short *start = s;
1680                 unsigned short *le = advance_row(s, 1);
1681                 unsigned short c;
1682                 int x = 0;
1683
1684                 do {
1685                         c = scr_readw(s);
1686
1687                         if (c == scr_readw(d)) {
1688                                 if (s > start) {
1689                                         ops->bmove(vc, info, line + ycount, x,
1690                                                    line, x, 1, s-start);
1691                                         x += s - start + 1;
1692                                         start = s + 1;
1693                                 } else {
1694                                         x++;
1695                                         start++;
1696                                 }
1697                         }
1698
1699                         scr_writew(c, d);
1700                         console_conditional_schedule();
1701                         s++;
1702                         d++;
1703                 } while (s < le);
1704                 if (s > start)
1705                         ops->bmove(vc, info, line + ycount, x, line, x, 1,
1706                                    s-start);
1707                 console_conditional_schedule();
1708                 if (ycount > 0)
1709                         line++;
1710                 else {
1711                         line--;
1712                         /* NOTE: We subtract two lines from these pointers */
1713                         s -= vc->vc_size_row;
1714                         d -= vc->vc_size_row;
1715                 }
1716         }
1717 }
1718
1719 static void fbcon_redraw(struct vc_data *vc, struct display *p,
1720                          int line, int count, int offset)
1721 {
1722         unsigned short *d = (unsigned short *)
1723             (vc->vc_origin + vc->vc_size_row * line);
1724         unsigned short *s = d + offset;
1725
1726         while (count--) {
1727                 unsigned short *start = s;
1728                 unsigned short *le = advance_row(s, 1);
1729                 unsigned short c;
1730                 int x = 0;
1731                 unsigned short attr = 1;
1732
1733                 do {
1734                         c = scr_readw(s);
1735                         if (attr != (c & 0xff00)) {
1736                                 attr = c & 0xff00;
1737                                 if (s > start) {
1738                                         fbcon_putcs(vc, start, s - start,
1739                                                     line, x);
1740                                         x += s - start;
1741                                         start = s;
1742                                 }
1743                         }
1744                         if (c == scr_readw(d)) {
1745                                 if (s > start) {
1746                                         fbcon_putcs(vc, start, s - start,
1747                                                      line, x);
1748                                         x += s - start + 1;
1749                                         start = s + 1;
1750                                 } else {
1751                                         x++;
1752                                         start++;
1753                                 }
1754                         }
1755                         scr_writew(c, d);
1756                         console_conditional_schedule();
1757                         s++;
1758                         d++;
1759                 } while (s < le);
1760                 if (s > start)
1761                         fbcon_putcs(vc, start, s - start, line, x);
1762                 console_conditional_schedule();
1763                 if (offset > 0)
1764                         line++;
1765                 else {
1766                         line--;
1767                         /* NOTE: We subtract two lines from these pointers */
1768                         s -= vc->vc_size_row;
1769                         d -= vc->vc_size_row;
1770                 }
1771         }
1772 }
1773
1774 static inline void fbcon_softback_note(struct vc_data *vc, int t,
1775                                        int count)
1776 {
1777         unsigned short *p;
1778
1779         if (vc->vc_num != fg_console)
1780                 return;
1781         p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1782
1783         while (count) {
1784                 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1785                 count--;
1786                 p = advance_row(p, 1);
1787                 softback_in += vc->vc_size_row;
1788                 if (softback_in == softback_end)
1789                         softback_in = softback_buf;
1790                 if (softback_in == softback_top) {
1791                         softback_top += vc->vc_size_row;
1792                         if (softback_top == softback_end)
1793                                 softback_top = softback_buf;
1794                 }
1795         }
1796         softback_curr = softback_in;
1797 }
1798
1799 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
1800                         int count)
1801 {
1802         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1803         struct display *p = &fb_display[vc->vc_num];
1804         int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1805
1806         if (fbcon_is_inactive(vc, info))
1807                 return -EINVAL;
1808
1809         fbcon_cursor(vc, CM_ERASE);
1810
1811         /*
1812          * ++Geert: Only use ywrap/ypan if the console is in text mode
1813          * ++Andrew: Only use ypan on hardware text mode when scrolling the
1814          *           whole screen (prevents flicker).
1815          */
1816
1817         switch (dir) {
1818         case SM_UP:
1819                 if (count > vc->vc_rows)        /* Maximum realistic size */
1820                         count = vc->vc_rows;
1821                 if (softback_top)
1822                         fbcon_softback_note(vc, t, count);
1823                 if (logo_shown >= 0)
1824                         goto redraw_up;
1825                 switch (p->scrollmode) {
1826                 case SCROLL_MOVE:
1827                         fbcon_redraw_blit(vc, info, p, t, b - t - count,
1828                                      count);
1829                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1830                         scr_memsetw((unsigned short *) (vc->vc_origin +
1831                                                         vc->vc_size_row *
1832                                                         (b - count)),
1833                                     vc->vc_video_erase_char,
1834                                     vc->vc_size_row * count);
1835                         return 1;
1836                         break;
1837
1838                 case SCROLL_WRAP_MOVE:
1839                         if (b - t - count > 3 * vc->vc_rows >> 2) {
1840                                 if (t > 0)
1841                                         fbcon_bmove(vc, 0, 0, count, 0, t,
1842                                                     vc->vc_cols);
1843                                 ywrap_up(vc, count);
1844                                 if (vc->vc_rows - b > 0)
1845                                         fbcon_bmove(vc, b - count, 0, b, 0,
1846                                                     vc->vc_rows - b,
1847                                                     vc->vc_cols);
1848                         } else if (info->flags & FBINFO_READS_FAST)
1849                                 fbcon_bmove(vc, t + count, 0, t, 0,
1850                                             b - t - count, vc->vc_cols);
1851                         else
1852                                 goto redraw_up;
1853                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1854                         break;
1855
1856                 case SCROLL_PAN_REDRAW:
1857                         if ((p->yscroll + count <=
1858                              2 * (p->vrows - vc->vc_rows))
1859                             && ((!scroll_partial && (b - t == vc->vc_rows))
1860                                 || (scroll_partial
1861                                     && (b - t - count >
1862                                         3 * vc->vc_rows >> 2)))) {
1863                                 if (t > 0)
1864                                         fbcon_redraw_move(vc, p, 0, t, count);
1865                                 ypan_up_redraw(vc, t, count);
1866                                 if (vc->vc_rows - b > 0)
1867                                         fbcon_redraw_move(vc, p, b,
1868                                                           vc->vc_rows - b, b);
1869                         } else
1870                                 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1871                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1872                         break;
1873
1874                 case SCROLL_PAN_MOVE:
1875                         if ((p->yscroll + count <=
1876                              2 * (p->vrows - vc->vc_rows))
1877                             && ((!scroll_partial && (b - t == vc->vc_rows))
1878                                 || (scroll_partial
1879                                     && (b - t - count >
1880                                         3 * vc->vc_rows >> 2)))) {
1881                                 if (t > 0)
1882                                         fbcon_bmove(vc, 0, 0, count, 0, t,
1883                                                     vc->vc_cols);
1884                                 ypan_up(vc, count);
1885                                 if (vc->vc_rows - b > 0)
1886                                         fbcon_bmove(vc, b - count, 0, b, 0,
1887                                                     vc->vc_rows - b,
1888                                                     vc->vc_cols);
1889                         } else if (info->flags & FBINFO_READS_FAST)
1890                                 fbcon_bmove(vc, t + count, 0, t, 0,
1891                                             b - t - count, vc->vc_cols);
1892                         else
1893                                 goto redraw_up;
1894                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1895                         break;
1896
1897                 case SCROLL_REDRAW:
1898                       redraw_up:
1899                         fbcon_redraw(vc, p, t, b - t - count,
1900                                      count * vc->vc_cols);
1901                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1902                         scr_memsetw((unsigned short *) (vc->vc_origin +
1903                                                         vc->vc_size_row *
1904                                                         (b - count)),
1905                                     vc->vc_video_erase_char,
1906                                     vc->vc_size_row * count);
1907                         return 1;
1908                 }
1909                 break;
1910
1911         case SM_DOWN:
1912                 if (count > vc->vc_rows)        /* Maximum realistic size */
1913                         count = vc->vc_rows;
1914                 if (logo_shown >= 0)
1915                         goto redraw_down;
1916                 switch (p->scrollmode) {
1917                 case SCROLL_MOVE:
1918                         fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,
1919                                      -count);
1920                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1921                         scr_memsetw((unsigned short *) (vc->vc_origin +
1922                                                         vc->vc_size_row *
1923                                                         t),
1924                                     vc->vc_video_erase_char,
1925                                     vc->vc_size_row * count);
1926                         return 1;
1927                         break;
1928
1929                 case SCROLL_WRAP_MOVE:
1930                         if (b - t - count > 3 * vc->vc_rows >> 2) {
1931                                 if (vc->vc_rows - b > 0)
1932                                         fbcon_bmove(vc, b, 0, b - count, 0,
1933                                                     vc->vc_rows - b,
1934                                                     vc->vc_cols);
1935                                 ywrap_down(vc, count);
1936                                 if (t > 0)
1937                                         fbcon_bmove(vc, count, 0, 0, 0, t,
1938                                                     vc->vc_cols);
1939                         } else if (info->flags & FBINFO_READS_FAST)
1940                                 fbcon_bmove(vc, t, 0, t + count, 0,
1941                                             b - t - count, vc->vc_cols);
1942                         else
1943                                 goto redraw_down;
1944                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1945                         break;
1946
1947                 case SCROLL_PAN_MOVE:
1948                         if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1949                             && ((!scroll_partial && (b - t == vc->vc_rows))
1950                                 || (scroll_partial
1951                                     && (b - t - count >
1952                                         3 * vc->vc_rows >> 2)))) {
1953                                 if (vc->vc_rows - b > 0)
1954                                         fbcon_bmove(vc, b, 0, b - count, 0,
1955                                                     vc->vc_rows - b,
1956                                                     vc->vc_cols);
1957                                 ypan_down(vc, count);
1958                                 if (t > 0)
1959                                         fbcon_bmove(vc, count, 0, 0, 0, t,
1960                                                     vc->vc_cols);
1961                         } else if (info->flags & FBINFO_READS_FAST)
1962                                 fbcon_bmove(vc, t, 0, t + count, 0,
1963                                             b - t - count, vc->vc_cols);
1964                         else
1965                                 goto redraw_down;
1966                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1967                         break;
1968
1969                 case SCROLL_PAN_REDRAW:
1970                         if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1971                             && ((!scroll_partial && (b - t == vc->vc_rows))
1972                                 || (scroll_partial
1973                                     && (b - t - count >
1974                                         3 * vc->vc_rows >> 2)))) {
1975                                 if (vc->vc_rows - b > 0)
1976                                         fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
1977                                                           b - count);
1978                                 ypan_down_redraw(vc, t, count);
1979                                 if (t > 0)
1980                                         fbcon_redraw_move(vc, p, count, t, 0);
1981                         } else
1982                                 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
1983                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1984                         break;
1985
1986                 case SCROLL_REDRAW:
1987                       redraw_down:
1988                         fbcon_redraw(vc, p, b - 1, b - t - count,
1989                                      -count * vc->vc_cols);
1990                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1991                         scr_memsetw((unsigned short *) (vc->vc_origin +
1992                                                         vc->vc_size_row *
1993                                                         t),
1994                                     vc->vc_video_erase_char,
1995                                     vc->vc_size_row * count);
1996                         return 1;
1997                 }
1998         }
1999         return 0;
2000 }
2001
2002
2003 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
2004                         int height, int width)
2005 {
2006         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2007         struct display *p = &fb_display[vc->vc_num];
2008
2009         if (fbcon_is_inactive(vc, info))
2010                 return;
2011
2012         if (!width || !height)
2013                 return;
2014
2015         /*  Split blits that cross physical y_wrap case.
2016          *  Pathological case involves 4 blits, better to use recursive
2017          *  code rather than unrolled case
2018          *
2019          *  Recursive invocations don't need to erase the cursor over and
2020          *  over again, so we use fbcon_bmove_rec()
2021          */
2022         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
2023                         p->vrows - p->yscroll);
2024 }
2025
2026 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
2027                             int dy, int dx, int height, int width, u_int y_break)
2028 {
2029         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2030         struct fbcon_ops *ops = info->fbcon_par;
2031         u_int b;
2032
2033         if (sy < y_break && sy + height > y_break) {
2034                 b = y_break - sy;
2035                 if (dy < sy) {  /* Avoid trashing self */
2036                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2037                                         y_break);
2038                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2039                                         height - b, width, y_break);
2040                 } else {
2041                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2042                                         height - b, width, y_break);
2043                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2044                                         y_break);
2045                 }
2046                 return;
2047         }
2048
2049         if (dy < y_break && dy + height > y_break) {
2050                 b = y_break - dy;
2051                 if (dy < sy) {  /* Avoid trashing self */
2052                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2053                                         y_break);
2054                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2055                                         height - b, width, y_break);
2056                 } else {
2057                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2058                                         height - b, width, y_break);
2059                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2060                                         y_break);
2061                 }
2062                 return;
2063         }
2064         ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
2065                    height, width);
2066 }
2067
2068 static void updatescrollmode(struct display *p,
2069                                         struct fb_info *info,
2070                                         struct vc_data *vc)
2071 {
2072         struct fbcon_ops *ops = info->fbcon_par;
2073         int fh = vc->vc_font.height;
2074         int cap = info->flags;
2075         u16 t = 0;
2076         int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
2077                                   info->fix.xpanstep);
2078         int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
2079         int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2080         int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
2081                                    info->var.xres_virtual);
2082         int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
2083                 divides(ypan, vc->vc_font.height) && vyres > yres;
2084         int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
2085                 divides(ywrap, vc->vc_font.height) &&
2086                 divides(vc->vc_font.height, vyres) &&
2087                 divides(vc->vc_font.height, yres);
2088         int reading_fast = cap & FBINFO_READS_FAST;
2089         int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
2090                 !(cap & FBINFO_HWACCEL_DISABLED);
2091         int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
2092                 !(cap & FBINFO_HWACCEL_DISABLED);
2093
2094         p->vrows = vyres/fh;
2095         if (yres > (fh * (vc->vc_rows + 1)))
2096                 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2097         if ((yres % fh) && (vyres % fh < yres % fh))
2098                 p->vrows--;
2099
2100         if (good_wrap || good_pan) {
2101                 if (reading_fast || fast_copyarea)
2102                         p->scrollmode = good_wrap ?
2103                                 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
2104                 else
2105                         p->scrollmode = good_wrap ? SCROLL_REDRAW :
2106                                 SCROLL_PAN_REDRAW;
2107         } else {
2108                 if (reading_fast || (fast_copyarea && !fast_imageblit))
2109                         p->scrollmode = SCROLL_MOVE;
2110                 else
2111                         p->scrollmode = SCROLL_REDRAW;
2112         }
2113 }
2114
2115 static int fbcon_resize(struct vc_data *vc, unsigned int width,
2116                         unsigned int height, unsigned int user)
2117 {
2118         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2119         struct fbcon_ops *ops = info->fbcon_par;
2120         struct display *p = &fb_display[vc->vc_num];
2121         struct fb_var_screeninfo var = info->var;
2122         int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2123
2124         virt_w = FBCON_SWAP(ops->rotate, width, height);
2125         virt_h = FBCON_SWAP(ops->rotate, height, width);
2126         virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2127                                  vc->vc_font.height);
2128         virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2129                                  vc->vc_font.width);
2130         var.xres = virt_w * virt_fw;
2131         var.yres = virt_h * virt_fh;
2132         x_diff = info->var.xres - var.xres;
2133         y_diff = info->var.yres - var.yres;
2134         if (x_diff < 0 || x_diff > virt_fw ||
2135             y_diff < 0 || y_diff > virt_fh) {
2136                 const struct fb_videomode *mode;
2137
2138                 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2139                 mode = fb_find_best_mode(&var, &info->modelist);
2140                 if (mode == NULL)
2141                         return -EINVAL;
2142                 display_to_var(&var, p);
2143                 fb_videomode_to_var(&var, mode);
2144
2145                 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2146                         return -EINVAL;
2147
2148                 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2149                 if (CON_IS_VISIBLE(vc)) {
2150                         var.activate = FB_ACTIVATE_NOW |
2151                                 FB_ACTIVATE_FORCE;
2152                         fb_set_var(info, &var);
2153                 }
2154                 var_to_display(p, &info->var, info);
2155                 ops->var = info->var;
2156         }
2157         updatescrollmode(p, info, vc);
2158         return 0;
2159 }
2160
2161 static int fbcon_switch(struct vc_data *vc)
2162 {
2163         struct fb_info *info, *old_info = NULL;
2164         struct fbcon_ops *ops;
2165         struct display *p = &fb_display[vc->vc_num];
2166         struct fb_var_screeninfo var;
2167         int i, ret, prev_console, charcnt = 256;
2168
2169         info = registered_fb[con2fb_map[vc->vc_num]];
2170         ops = info->fbcon_par;
2171
2172         if (softback_top) {
2173                 if (softback_lines)
2174                         fbcon_set_origin(vc);
2175                 softback_top = softback_curr = softback_in = softback_buf;
2176                 softback_lines = 0;
2177                 fbcon_update_softback(vc);
2178         }
2179
2180         if (logo_shown >= 0) {
2181                 struct vc_data *conp2 = vc_cons[logo_shown].d;
2182
2183                 if (conp2->vc_top == logo_lines
2184                     && conp2->vc_bottom == conp2->vc_rows)
2185                         conp2->vc_top = 0;
2186                 logo_shown = FBCON_LOGO_CANSHOW;
2187         }
2188
2189         prev_console = ops->currcon;
2190         if (prev_console != -1)
2191                 old_info = registered_fb[con2fb_map[prev_console]];
2192         /*
2193          * FIXME: If we have multiple fbdev's loaded, we need to
2194          * update all info->currcon.  Perhaps, we can place this
2195          * in a centralized structure, but this might break some
2196          * drivers.
2197          *
2198          * info->currcon = vc->vc_num;
2199          */
2200         for (i = 0; i < FB_MAX; i++) {
2201                 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
2202                         struct fbcon_ops *o = registered_fb[i]->fbcon_par;
2203
2204                         o->currcon = vc->vc_num;
2205                 }
2206         }
2207         memset(&var, 0, sizeof(struct fb_var_screeninfo));
2208         display_to_var(&var, p);
2209         var.activate = FB_ACTIVATE_NOW;
2210
2211         /*
2212          * make sure we don't unnecessarily trip the memcmp()
2213          * in fb_set_var()
2214          */
2215         info->var.activate = var.activate;
2216         var.vmode |= info->var.vmode & ~FB_VMODE_MASK;
2217         fb_set_var(info, &var);
2218         ops->var = info->var;
2219
2220         if (old_info != NULL && (old_info != info ||
2221                                  info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2222                 if (info->fbops->fb_set_par) {
2223                         ret = info->fbops->fb_set_par(info);
2224
2225                         if (ret)
2226                                 printk(KERN_ERR "fbcon_switch: detected "
2227                                         "unhandled fb_set_par error, "
2228                                         "error code %d\n", ret);
2229                 }
2230
2231                 if (old_info != info)
2232                         fbcon_del_cursor_timer(old_info);
2233         }
2234
2235         if (fbcon_is_inactive(vc, info) ||
2236             ops->blank_state != FB_BLANK_UNBLANK)
2237                 fbcon_del_cursor_timer(info);
2238         else
2239                 fbcon_add_cursor_timer(info);
2240
2241         set_blitting_type(vc, info);
2242         ops->cursor_reset = 1;
2243
2244         if (ops->rotate_font && ops->rotate_font(info, vc)) {
2245                 ops->rotate = FB_ROTATE_UR;
2246                 set_blitting_type(vc, info);
2247         }
2248
2249         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2250         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2251
2252         if (p->userfont)
2253                 charcnt = FNTCHARCNT(vc->vc_font.data);
2254
2255         if (charcnt > 256)
2256                 vc->vc_complement_mask <<= 1;
2257
2258         updatescrollmode(p, info, vc);
2259
2260         switch (p->scrollmode) {
2261         case SCROLL_WRAP_MOVE:
2262                 scrollback_phys_max = p->vrows - vc->vc_rows;
2263                 break;
2264         case SCROLL_PAN_MOVE:
2265         case SCROLL_PAN_REDRAW:
2266                 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2267                 if (scrollback_phys_max < 0)
2268                         scrollback_phys_max = 0;
2269                 break;
2270         default:
2271                 scrollback_phys_max = 0;
2272                 break;
2273         }
2274
2275         scrollback_max = 0;
2276         scrollback_current = 0;
2277
2278         if (!fbcon_is_inactive(vc, info)) {
2279             ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2280             ops->update_start(info);
2281         }
2282
2283         fbcon_set_palette(vc, color_table);
2284         fbcon_clear_margins(vc, 0);
2285
2286         if (logo_shown == FBCON_LOGO_DRAW) {
2287
2288                 logo_shown = fg_console;
2289                 /* This is protected above by initmem_freed */
2290                 fb_show_logo(info, ops->rotate);
2291                 update_region(vc,
2292                               vc->vc_origin + vc->vc_size_row * vc->vc_top,
2293                               vc->vc_size_row * (vc->vc_bottom -
2294                                                  vc->vc_top) / 2);
2295                 return 0;
2296         }
2297         return 1;
2298 }
2299
2300 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2301                                 int blank)
2302 {
2303         struct fb_event event;
2304
2305         if (blank) {
2306                 unsigned short charmask = vc->vc_hi_font_mask ?
2307                         0x1ff : 0xff;
2308                 unsigned short oldc;
2309
2310                 oldc = vc->vc_video_erase_char;
2311                 vc->vc_video_erase_char &= charmask;
2312                 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2313                 vc->vc_video_erase_char = oldc;
2314         }
2315
2316
2317         if (!lock_fb_info(info))
2318                 return;
2319         event.info = info;
2320         event.data = &blank;
2321         fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
2322         unlock_fb_info(info);
2323 }
2324
2325 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2326 {
2327         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2328         struct fbcon_ops *ops = info->fbcon_par;
2329
2330         if (mode_switch) {
2331                 struct fb_var_screeninfo var = info->var;
2332
2333                 ops->graphics = 1;
2334
2335                 if (!blank) {
2336                         var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2337                         fb_set_var(info, &var);
2338                         ops->graphics = 0;
2339                         ops->var = info->var;
2340                 }
2341         }
2342
2343         if (!fbcon_is_inactive(vc, info)) {
2344                 if (ops->blank_state != blank) {
2345                         ops->blank_state = blank;
2346                         fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2347                         ops->cursor_flash = (!blank);
2348
2349                         if (!(info->flags & FBINFO_MISC_USEREVENT))
2350                                 if (fb_blank(info, blank))
2351                                         fbcon_generic_blank(vc, info, blank);
2352                 }
2353
2354                 if (!blank)
2355                         update_screen(vc);
2356         }
2357
2358         if (mode_switch || fbcon_is_inactive(vc, info) ||
2359             ops->blank_state != FB_BLANK_UNBLANK)
2360                 fbcon_del_cursor_timer(info);
2361         else
2362                 fbcon_add_cursor_timer(info);
2363
2364         return 0;
2365 }
2366
2367 static int fbcon_debug_enter(struct vc_data *vc)
2368 {
2369         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2370         struct fbcon_ops *ops = info->fbcon_par;
2371
2372         ops->save_graphics = ops->graphics;
2373         ops->graphics = 0;
2374         if (info->fbops->fb_debug_enter)
2375                 info->fbops->fb_debug_enter(info);
2376         fbcon_set_palette(vc, color_table);
2377         return 0;
2378 }
2379
2380 static int fbcon_debug_leave(struct vc_data *vc)
2381 {
2382         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2383         struct fbcon_ops *ops = info->fbcon_par;
2384
2385         ops->graphics = ops->save_graphics;
2386         if (info->fbops->fb_debug_leave)
2387                 info->fbops->fb_debug_leave(info);
2388         return 0;
2389 }
2390
2391 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2392 {
2393         u8 *fontdata = vc->vc_font.data;
2394         u8 *data = font->data;
2395         int i, j;
2396
2397         font->width = vc->vc_font.width;
2398         font->height = vc->vc_font.height;
2399         font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2400         if (!font->data)
2401                 return 0;
2402
2403         if (font->width <= 8) {
2404                 j = vc->vc_font.height;
2405                 for (i = 0; i < font->charcount; i++) {
2406                         memcpy(data, fontdata, j);
2407                         memset(data + j, 0, 32 - j);
2408                         data += 32;
2409                         fontdata += j;
2410                 }
2411         } else if (font->width <= 16) {
2412                 j = vc->vc_font.height * 2;
2413                 for (i = 0; i < font->charcount; i++) {
2414                         memcpy(data, fontdata, j);
2415                         memset(data + j, 0, 64 - j);
2416                         data += 64;
2417                         fontdata += j;
2418                 }
2419         } else if (font->width <= 24) {
2420                 for (i = 0; i < font->charcount; i++) {
2421                         for (j = 0; j < vc->vc_font.height; j++) {
2422                                 *data++ = fontdata[0];
2423                                 *data++ = fontdata[1];
2424                                 *data++ = fontdata[2];
2425                                 fontdata += sizeof(u32);
2426                         }
2427                         memset(data, 0, 3 * (32 - j));
2428                         data += 3 * (32 - j);
2429                 }
2430         } else {
2431                 j = vc->vc_font.height * 4;
2432                 for (i = 0; i < font->charcount; i++) {
2433                         memcpy(data, fontdata, j);
2434                         memset(data + j, 0, 128 - j);
2435                         data += 128;
2436                         fontdata += j;
2437                 }
2438         }
2439         return 0;
2440 }
2441
2442 static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2443                              const u8 * data, int userfont)
2444 {
2445         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2446         struct fbcon_ops *ops = info->fbcon_par;
2447         struct display *p = &fb_display[vc->vc_num];
2448         int resize;
2449         int cnt;
2450         char *old_data = NULL;
2451
2452         if (CON_IS_VISIBLE(vc) && softback_lines)
2453                 fbcon_set_origin(vc);
2454
2455         resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2456         if (p->userfont)
2457                 old_data = vc->vc_font.data;
2458         if (userfont)
2459                 cnt = FNTCHARCNT(data);
2460         else
2461                 cnt = 256;
2462         vc->vc_font.data = (void *)(p->fontdata = data);
2463         if ((p->userfont = userfont))
2464                 REFCOUNT(data)++;
2465         vc->vc_font.width = w;
2466         vc->vc_font.height = h;
2467         if (vc->vc_hi_font_mask && cnt == 256) {
2468                 vc->vc_hi_font_mask = 0;
2469                 if (vc->vc_can_do_color) {
2470                         vc->vc_complement_mask >>= 1;
2471                         vc->vc_s_complement_mask >>= 1;
2472                 }
2473
2474                 /* ++Edmund: reorder the attribute bits */
2475                 if (vc->vc_can_do_color) {
2476                         unsigned short *cp =
2477                             (unsigned short *) vc->vc_origin;
2478                         int count = vc->vc_screenbuf_size / 2;
2479                         unsigned short c;
2480                         for (; count > 0; count--, cp++) {
2481                                 c = scr_readw(cp);
2482                                 scr_writew(((c & 0xfe00) >> 1) |
2483                                            (c & 0xff), cp);
2484                         }
2485                         c = vc->vc_video_erase_char;
2486                         vc->vc_video_erase_char =
2487                             ((c & 0xfe00) >> 1) | (c & 0xff);
2488                         vc->vc_attr >>= 1;
2489                 }
2490         } else if (!vc->vc_hi_font_mask && cnt == 512) {
2491                 vc->vc_hi_font_mask = 0x100;
2492                 if (vc->vc_can_do_color) {
2493                         vc->vc_complement_mask <<= 1;
2494                         vc->vc_s_complement_mask <<= 1;
2495                 }
2496
2497                 /* ++Edmund: reorder the attribute bits */
2498                 {
2499                         unsigned short *cp =
2500                             (unsigned short *) vc->vc_origin;
2501                         int count = vc->vc_screenbuf_size / 2;
2502                         unsigned short c;
2503                         for (; count > 0; count--, cp++) {
2504                                 unsigned short newc;
2505                                 c = scr_readw(cp);
2506                                 if (vc->vc_can_do_color)
2507                                         newc =
2508                                             ((c & 0xff00) << 1) | (c &
2509                                                                    0xff);
2510                                 else
2511                                         newc = c & ~0x100;
2512                                 scr_writew(newc, cp);
2513                         }
2514                         c = vc->vc_video_erase_char;
2515                         if (vc->vc_can_do_color) {
2516                                 vc->vc_video_erase_char =
2517                                     ((c & 0xff00) << 1) | (c & 0xff);
2518                                 vc->vc_attr <<= 1;
2519                         } else
2520                                 vc->vc_video_erase_char = c & ~0x100;
2521                 }
2522
2523         }
2524
2525         if (resize) {
2526                 int cols, rows;
2527
2528                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2529                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2530                 cols /= w;
2531                 rows /= h;
2532                 vc_resize(vc, cols, rows);
2533                 if (CON_IS_VISIBLE(vc) && softback_buf)
2534                         fbcon_update_softback(vc);
2535         } else if (CON_IS_VISIBLE(vc)
2536                    && vc->vc_mode == KD_TEXT) {
2537                 fbcon_clear_margins(vc, 0);
2538                 update_screen(vc);
2539         }
2540
2541         if (old_data && (--REFCOUNT(old_data) == 0))
2542                 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2543         return 0;
2544 }
2545
2546 static int fbcon_copy_font(struct vc_data *vc, int con)
2547 {
2548         struct display *od = &fb_display[con];
2549         struct console_font *f = &vc->vc_font;
2550
2551         if (od->fontdata == f->data)
2552                 return 0;       /* already the same font... */
2553         return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2554 }
2555
2556 /*
2557  *  User asked to set font; we are guaranteed that
2558  *      a) width and height are in range 1..32
2559  *      b) charcount does not exceed 512
2560  *  but lets not assume that, since someone might someday want to use larger
2561  *  fonts. And charcount of 512 is small for unicode support.
2562  *
2563  *  However, user space gives the font in 32 rows , regardless of
2564  *  actual font height. So a new API is needed if support for larger fonts
2565  *  is ever implemented.
2566  */
2567
2568 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2569 {
2570         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2571         unsigned charcount = font->charcount;
2572         int w = font->width;
2573         int h = font->height;
2574         int size;
2575         int i, csum;
2576         u8 *new_data, *data = font->data;
2577         int pitch = (font->width+7) >> 3;
2578
2579         /* Is there a reason why fbconsole couldn't handle any charcount >256?
2580          * If not this check should be changed to charcount < 256 */
2581         if (charcount != 256 && charcount != 512)
2582                 return -EINVAL;
2583
2584         /* Make sure drawing engine can handle the font */
2585         if (!(info->pixmap.blit_x & (1 << (font->width - 1))) ||
2586             !(info->pixmap.blit_y & (1 << (font->height - 1))))
2587                 return -EINVAL;
2588
2589         /* Make sure driver can handle the font length */
2590         if (fbcon_invalid_charcount(info, charcount))
2591                 return -EINVAL;
2592
2593         size = h * pitch * charcount;
2594
2595         new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2596
2597         if (!new_data)
2598                 return -ENOMEM;
2599
2600         new_data += FONT_EXTRA_WORDS * sizeof(int);
2601         FNTSIZE(new_data) = size;
2602         FNTCHARCNT(new_data) = charcount;
2603         REFCOUNT(new_data) = 0; /* usage counter */
2604         for (i=0; i< charcount; i++) {
2605                 memcpy(new_data + i*h*pitch, data +  i*32*pitch, h*pitch);
2606         }
2607
2608         /* Since linux has a nice crc32 function use it for counting font
2609          * checksums. */
2610         csum = crc32(0, new_data, size);
2611
2612         FNTSUM(new_data) = csum;
2613         /* Check if the same font is on some other console already */
2614         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2615                 struct vc_data *tmp = vc_cons[i].d;
2616
2617                 if (fb_display[i].userfont &&
2618                     fb_display[i].fontdata &&
2619                     FNTSUM(fb_display[i].fontdata) == csum &&
2620                     FNTSIZE(fb_display[i].fontdata) == size &&
2621                     tmp->vc_font.width == w &&
2622                     !memcmp(fb_display[i].fontdata, new_data, size)) {
2623                         kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2624                         new_data = (u8 *)fb_display[i].fontdata;
2625                         break;
2626                 }
2627         }
2628         return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2629 }
2630
2631 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2632 {
2633         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2634         const struct font_desc *f;
2635
2636         if (!name)
2637                 f = get_default_font(info->var.xres, info->var.yres,
2638                                      info->pixmap.blit_x, info->pixmap.blit_y);
2639         else if (!(f = find_font(name)))
2640                 return -ENOENT;
2641
2642         font->width = f->width;
2643         font->height = f->height;
2644         return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2645 }
2646
2647 static u16 palette_red[16];
2648 static u16 palette_green[16];
2649 static u16 palette_blue[16];
2650
2651 static struct fb_cmap palette_cmap = {
2652         0, 16, palette_red, palette_green, palette_blue, NULL
2653 };
2654
2655 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
2656 {
2657         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2658         int i, j, k, depth;
2659         u8 val;
2660
2661         if (fbcon_is_inactive(vc, info))
2662                 return -EINVAL;
2663
2664         if (!CON_IS_VISIBLE(vc))
2665                 return 0;
2666
2667         depth = fb_get_color_depth(&info->var, &info->fix);
2668         if (depth > 3) {
2669                 for (i = j = 0; i < 16; i++) {
2670                         k = table[i];
2671                         val = vc->vc_palette[j++];
2672                         palette_red[k] = (val << 8) | val;
2673                         val = vc->vc_palette[j++];
2674                         palette_green[k] = (val << 8) | val;
2675                         val = vc->vc_palette[j++];
2676                         palette_blue[k] = (val << 8) | val;
2677                 }
2678                 palette_cmap.len = 16;
2679                 palette_cmap.start = 0;
2680         /*
2681          * If framebuffer is capable of less than 16 colors,
2682          * use default palette of fbcon.
2683          */
2684         } else
2685                 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2686
2687         return fb_set_cmap(&palette_cmap, info);
2688 }
2689
2690 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2691 {
2692         unsigned long p;
2693         int line;
2694
2695         if (vc->vc_num != fg_console || !softback_lines)
2696                 return (u16 *) (vc->vc_origin + offset);
2697         line = offset / vc->vc_size_row;
2698         if (line >= softback_lines)
2699                 return (u16 *) (vc->vc_origin + offset -
2700                                 softback_lines * vc->vc_size_row);
2701         p = softback_curr + offset;
2702         if (p >= softback_end)
2703                 p += softback_buf - softback_end;
2704         return (u16 *) p;
2705 }
2706
2707 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2708                                  int *px, int *py)
2709 {
2710         unsigned long ret;
2711         int x, y;
2712
2713         if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2714                 unsigned long offset = (pos - vc->vc_origin) / 2;
2715
2716                 x = offset % vc->vc_cols;
2717                 y = offset / vc->vc_cols;
2718                 if (vc->vc_num == fg_console)
2719                         y += softback_lines;
2720                 ret = pos + (vc->vc_cols - x) * 2;
2721         } else if (vc->vc_num == fg_console && softback_lines) {
2722                 unsigned long offset = pos - softback_curr;
2723
2724                 if (pos < softback_curr)
2725                         offset += softback_end - softback_buf;
2726                 offset /= 2;
2727                 x = offset % vc->vc_cols;
2728                 y = offset / vc->vc_cols;
2729                 ret = pos + (vc->vc_cols - x) * 2;
2730                 if (ret == softback_end)
2731                         ret = softback_buf;
2732                 if (ret == softback_in)
2733                         ret = vc->vc_origin;
2734         } else {
2735                 /* Should not happen */
2736                 x = y = 0;
2737                 ret = vc->vc_origin;
2738         }
2739         if (px)
2740                 *px = x;
2741         if (py)
2742                 *py = y;
2743         return ret;
2744 }
2745
2746 /* As we might be inside of softback, we may work with non-contiguous buffer,
2747    that's why we have to use a separate routine. */
2748 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2749 {
2750         while (cnt--) {
2751                 u16 a = scr_readw(p);
2752                 if (!vc->vc_can_do_color)
2753                         a ^= 0x0800;
2754                 else if (vc->vc_hi_font_mask == 0x100)
2755                         a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2756                             (((a) & 0x0e00) << 4);
2757                 else
2758                         a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2759                             (((a) & 0x0700) << 4);
2760                 scr_writew(a, p++);
2761                 if (p == (u16 *) softback_end)
2762                         p = (u16 *) softback_buf;
2763                 if (p == (u16 *) softback_in)
2764                         p = (u16 *) vc->vc_origin;
2765         }
2766 }
2767
2768 static int fbcon_scrolldelta(struct vc_data *vc, int lines)
2769 {
2770         struct fb_info *info = registered_fb[con2fb_map[fg_console]];
2771         struct fbcon_ops *ops = info->fbcon_par;
2772         struct display *disp = &fb_display[fg_console];
2773         int offset, limit, scrollback_old;
2774
2775         if (softback_top) {
2776                 if (vc->vc_num != fg_console)
2777                         return 0;
2778                 if (vc->vc_mode != KD_TEXT || !lines)
2779                         return 0;
2780                 if (logo_shown >= 0) {
2781                         struct vc_data *conp2 = vc_cons[logo_shown].d;
2782
2783                         if (conp2->vc_top == logo_lines
2784                             && conp2->vc_bottom == conp2->vc_rows)
2785                                 conp2->vc_top = 0;
2786                         if (logo_shown == vc->vc_num) {
2787                                 unsigned long p, q;
2788                                 int i;
2789
2790                                 p = softback_in;
2791                                 q = vc->vc_origin +
2792                                     logo_lines * vc->vc_size_row;
2793                                 for (i = 0; i < logo_lines; i++) {
2794                                         if (p == softback_top)
2795                                                 break;
2796                                         if (p == softback_buf)
2797                                                 p = softback_end;
2798                                         p -= vc->vc_size_row;
2799                                         q -= vc->vc_size_row;
2800                                         scr_memcpyw((u16 *) q, (u16 *) p,
2801                                                     vc->vc_size_row);
2802                                 }
2803                                 softback_in = softback_curr = p;
2804                                 update_region(vc, vc->vc_origin,
2805                                               logo_lines * vc->vc_cols);
2806                         }
2807                         logo_shown = FBCON_LOGO_CANSHOW;
2808                 }
2809                 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2810                 fbcon_redraw_softback(vc, disp, lines);
2811                 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2812                 return 0;
2813         }
2814
2815         if (!scrollback_phys_max)
2816                 return -ENOSYS;
2817
2818         scrollback_old = scrollback_current;
2819         scrollback_current -= lines;
2820         if (scrollback_current < 0)
2821                 scrollback_current = 0;
2822         else if (scrollback_current > scrollback_max)
2823                 scrollback_current = scrollback_max;
2824         if (scrollback_current == scrollback_old)
2825                 return 0;
2826
2827         if (fbcon_is_inactive(vc, info))
2828                 return 0;
2829
2830         fbcon_cursor(vc, CM_ERASE);
2831
2832         offset = disp->yscroll - scrollback_current;
2833         limit = disp->vrows;
2834         switch (disp->scrollmode) {
2835         case SCROLL_WRAP_MOVE:
2836                 info->var.vmode |= FB_VMODE_YWRAP;
2837                 break;
2838         case SCROLL_PAN_MOVE:
2839         case SCROLL_PAN_REDRAW:
2840                 limit -= vc->vc_rows;
2841                 info->var.vmode &= ~FB_VMODE_YWRAP;
2842                 break;
2843         }
2844         if (offset < 0)
2845                 offset += limit;
2846         else if (offset >= limit)
2847                 offset -= limit;
2848
2849         ops->var.xoffset = 0;
2850         ops->var.yoffset = offset * vc->vc_font.height;
2851         ops->update_start(info);
2852
2853         if (!scrollback_current)
2854                 fbcon_cursor(vc, CM_DRAW);
2855         return 0;
2856 }
2857
2858 static int fbcon_set_origin(struct vc_data *vc)
2859 {
2860         if (softback_lines)
2861                 fbcon_scrolldelta(vc, softback_lines);
2862         return 0;
2863 }
2864
2865 static void fbcon_suspended(struct fb_info *info)
2866 {
2867         struct vc_data *vc = NULL;
2868         struct fbcon_ops *ops = info->fbcon_par;
2869
2870         if (!ops || ops->currcon < 0)
2871                 return;
2872         vc = vc_cons[ops->currcon].d;
2873
2874         /* Clear cursor, restore saved data */
2875         fbcon_cursor(vc, CM_ERASE);
2876 }
2877
2878 static void fbcon_resumed(struct fb_info *info)
2879 {
2880         struct vc_data *vc;
2881         struct fbcon_ops *ops = info->fbcon_par;
2882
2883         if (!ops || ops->currcon < 0)
2884                 return;
2885         vc = vc_cons[ops->currcon].d;
2886
2887         update_screen(vc);
2888 }
2889
2890 static void fbcon_modechanged(struct fb_info *info)
2891 {
2892         struct fbcon_ops *ops = info->fbcon_par;
2893         struct vc_data *vc;
2894         struct display *p;
2895         int rows, cols;
2896
2897         if (!ops || ops->currcon < 0)
2898                 return;
2899         vc = vc_cons[ops->currcon].d;
2900         if (vc->vc_mode != KD_TEXT ||
2901             registered_fb[con2fb_map[ops->currcon]] != info)
2902                 return;
2903
2904         p = &fb_display[vc->vc_num];
2905         set_blitting_type(vc, info);
2906
2907         if (CON_IS_VISIBLE(vc)) {
2908                 var_to_display(p, &info->var, info);
2909                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2910                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2911                 cols /= vc->vc_font.width;
2912                 rows /= vc->vc_font.height;
2913                 vc_resize(vc, cols, rows);
2914                 updatescrollmode(p, info, vc);
2915                 scrollback_max = 0;
2916                 scrollback_current = 0;
2917
2918                 if (!fbcon_is_inactive(vc, info)) {
2919                     ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2920                     ops->update_start(info);
2921                 }
2922
2923                 fbcon_set_palette(vc, color_table);
2924                 update_screen(vc);
2925                 if (softback_buf)
2926                         fbcon_update_softback(vc);
2927         }
2928 }
2929
2930 static void fbcon_set_all_vcs(struct fb_info *info)
2931 {
2932         struct fbcon_ops *ops = info->fbcon_par;
2933         struct vc_data *vc;
2934         struct display *p;
2935         int i, rows, cols, fg = -1;
2936
2937         if (!ops || ops->currcon < 0)
2938                 return;
2939
2940         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2941                 vc = vc_cons[i].d;
2942                 if (!vc || vc->vc_mode != KD_TEXT ||
2943                     registered_fb[con2fb_map[i]] != info)
2944                         continue;
2945
2946                 if (CON_IS_VISIBLE(vc)) {
2947                         fg = i;
2948                         continue;
2949                 }
2950
2951                 p = &fb_display[vc->vc_num];
2952                 set_blitting_type(vc, info);
2953                 var_to_display(p, &info->var, info);
2954                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2955                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2956                 cols /= vc->vc_font.width;
2957                 rows /= vc->vc_font.height;
2958                 vc_resize(vc, cols, rows);
2959         }
2960
2961         if (fg != -1)
2962                 fbcon_modechanged(info);
2963 }
2964
2965 static int fbcon_mode_deleted(struct fb_info *info,
2966                               struct fb_videomode *mode)
2967 {
2968         struct fb_info *fb_info;
2969         struct display *p;
2970         int i, j, found = 0;
2971
2972         /* before deletion, ensure that mode is not in use */
2973         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2974                 j = con2fb_map[i];
2975                 if (j == -1)
2976                         continue;
2977                 fb_info = registered_fb[j];
2978                 if (fb_info != info)
2979                         continue;
2980                 p = &fb_display[i];
2981                 if (!p || !p->mode)
2982                         continue;
2983                 if (fb_mode_is_equal(p->mode, mode)) {
2984                         found = 1;
2985                         break;
2986                 }
2987         }
2988         return found;
2989 }
2990
2991 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
2992 static int fbcon_unbind(void)
2993 {
2994         int ret;
2995
2996         ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
2997                                 fbcon_is_default);
2998
2999         if (!ret)
3000                 fbcon_has_console_bind = 0;
3001
3002         return ret;
3003 }
3004 #else
3005 static inline int fbcon_unbind(void)
3006 {
3007         return -EINVAL;
3008 }
3009 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3010
3011 /* called with console_lock held */
3012 static int fbcon_fb_unbind(int idx)
3013 {
3014         int i, new_idx = -1, ret = 0;
3015
3016         if (!fbcon_has_console_bind)
3017                 return 0;
3018
3019         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3020                 if (con2fb_map[i] != idx &&
3021                     con2fb_map[i] != -1) {
3022                         new_idx = i;
3023                         break;
3024                 }
3025         }
3026
3027         if (new_idx != -1) {
3028                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3029                         if (con2fb_map[i] == idx)
3030                                 set_con2fb_map(i, new_idx, 0);
3031                 }
3032         } else {
3033                 struct fb_info *info = registered_fb[idx];
3034
3035                 /* This is sort of like set_con2fb_map, except it maps
3036                  * the consoles to no device and then releases the
3037                  * oldinfo to free memory and cancel the cursor blink
3038                  * timer. I can imagine this just becoming part of
3039                  * set_con2fb_map where new_idx is -1
3040                  */
3041                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3042                         if (con2fb_map[i] == idx) {
3043                                 con2fb_map[i] = -1;
3044                                 if (!search_fb_in_map(idx)) {
3045                                         ret = con2fb_release_oldinfo(vc_cons[i].d,
3046                                                                      info, NULL, i,
3047                                                                      idx, 0);
3048                                         if (ret) {
3049                                                 con2fb_map[i] = idx;
3050                                                 return ret;
3051                                         }
3052                                 }
3053                         }
3054                 }
3055                 ret = fbcon_unbind();
3056         }
3057
3058         return ret;
3059 }
3060
3061 /* called with console_lock held */
3062 static int fbcon_fb_unregistered(struct fb_info *info)
3063 {
3064         int i, idx;
3065
3066         idx = info->node;
3067         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3068                 if (con2fb_map[i] == idx)
3069                         con2fb_map[i] = -1;
3070         }
3071
3072         if (idx == info_idx) {
3073                 info_idx = -1;
3074
3075                 for (i = 0; i < FB_MAX; i++) {
3076                         if (registered_fb[i] != NULL) {
3077                                 info_idx = i;
3078                                 break;
3079                         }
3080                 }
3081         }
3082
3083         if (info_idx != -1) {
3084                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3085                         if (con2fb_map[i] == -1)
3086                                 con2fb_map[i] = info_idx;
3087                 }
3088         }
3089
3090         if (primary_device == idx)
3091                 primary_device = -1;
3092
3093         if (!num_registered_fb)
3094                 do_unregister_con_driver(&fb_con);
3095
3096         return 0;
3097 }
3098
3099 /* called with console_lock held */
3100 static void fbcon_remap_all(int idx)
3101 {
3102         int i;
3103         for (i = first_fb_vc; i <= last_fb_vc; i++)
3104                 set_con2fb_map(i, idx, 0);
3105
3106         if (con_is_bound(&fb_con)) {
3107                 printk(KERN_INFO "fbcon: Remapping primary device, "
3108                        "fb%i, to tty %i-%i\n", idx,
3109                        first_fb_vc + 1, last_fb_vc + 1);
3110                 info_idx = idx;
3111         }
3112 }
3113
3114 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
3115 static void fbcon_select_primary(struct fb_info *info)
3116 {
3117         if (!map_override && primary_device == -1 &&
3118             fb_is_primary_device(info)) {
3119                 int i;
3120
3121                 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n",
3122                        info->fix.id, info->node);
3123                 primary_device = info->node;
3124
3125                 for (i = first_fb_vc; i <= last_fb_vc; i++)
3126                         con2fb_map_boot[i] = primary_device;
3127
3128                 if (con_is_bound(&fb_con)) {
3129                         printk(KERN_INFO "fbcon: Remapping primary device, "
3130                                "fb%i, to tty %i-%i\n", info->node,
3131                                first_fb_vc + 1, last_fb_vc + 1);
3132                         info_idx = primary_device;
3133                 }
3134         }
3135
3136 }
3137 #else
3138 static inline void fbcon_select_primary(struct fb_info *info)
3139 {
3140         return;
3141 }
3142 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
3143
3144 /* called with console_lock held */
3145 static int fbcon_fb_registered(struct fb_info *info)
3146 {
3147         int ret = 0, i, idx;
3148
3149         idx = info->node;
3150         fbcon_select_primary(info);
3151
3152         if (info_idx == -1) {
3153                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3154                         if (con2fb_map_boot[i] == idx) {
3155                                 info_idx = idx;
3156                                 break;
3157                         }
3158                 }
3159
3160                 if (info_idx != -1)
3161                         ret = do_fbcon_takeover(1);
3162         } else {
3163                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3164                         if (con2fb_map_boot[i] == idx)
3165                                 set_con2fb_map(i, idx, 0);
3166                 }
3167         }
3168
3169         return ret;
3170 }
3171
3172 static void fbcon_fb_blanked(struct fb_info *info, int blank)
3173 {
3174         struct fbcon_ops *ops = info->fbcon_par;
3175         struct vc_data *vc;
3176
3177         if (!ops || ops->currcon < 0)
3178                 return;
3179
3180         vc = vc_cons[ops->currcon].d;
3181         if (vc->vc_mode != KD_TEXT ||
3182                         registered_fb[con2fb_map[ops->currcon]] != info)
3183                 return;
3184
3185         if (CON_IS_VISIBLE(vc)) {
3186                 if (blank)
3187                         do_blank_screen(0);
3188                 else
3189                         do_unblank_screen(0);
3190         }
3191         ops->blank_state = blank;
3192 }
3193
3194 static void fbcon_new_modelist(struct fb_info *info)
3195 {
3196         int i;
3197         struct vc_data *vc;
3198         struct fb_var_screeninfo var;
3199         const struct fb_videomode *mode;
3200
3201         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3202                 if (registered_fb[con2fb_map[i]] != info)
3203                         continue;
3204                 if (!fb_display[i].mode)
3205                         continue;
3206                 vc = vc_cons[i].d;
3207                 display_to_var(&var, &fb_display[i]);
3208                 mode = fb_find_nearest_mode(fb_display[i].mode,
3209                                             &info->modelist);
3210                 fb_videomode_to_var(&var, mode);
3211                 fbcon_set_disp(info, &var, vc->vc_num);
3212         }
3213 }
3214
3215 static void fbcon_get_requirement(struct fb_info *info,
3216                                   struct fb_blit_caps *caps)
3217 {
3218         struct vc_data *vc;
3219         struct display *p;
3220
3221         if (caps->flags) {
3222                 int i, charcnt;
3223
3224                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3225                         vc = vc_cons[i].d;
3226                         if (vc && vc->vc_mode == KD_TEXT &&
3227                             info->node == con2fb_map[i]) {
3228                                 p = &fb_display[i];
3229                                 caps->x |= 1 << (vc->vc_font.width - 1);
3230                                 caps->y |= 1 << (vc->vc_font.height - 1);
3231                                 charcnt = (p->userfont) ?
3232                                         FNTCHARCNT(p->fontdata) : 256;
3233                                 if (caps->len < charcnt)
3234                                         caps->len = charcnt;
3235                         }
3236                 }
3237         } else {
3238                 vc = vc_cons[fg_console].d;
3239
3240                 if (vc && vc->vc_mode == KD_TEXT &&
3241                     info->node == con2fb_map[fg_console]) {
3242                         p = &fb_display[fg_console];
3243                         caps->x = 1 << (vc->vc_font.width - 1);
3244                         caps->y = 1 << (vc->vc_font.height - 1);
3245                         caps->len = (p->userfont) ?
3246                                 FNTCHARCNT(p->fontdata) : 256;
3247                 }
3248         }
3249 }
3250
3251 static int fbcon_event_notify(struct notifier_block *self,
3252                               unsigned long action, void *data)
3253 {
3254         struct fb_event *event = data;
3255         struct fb_info *info = event->info;
3256         struct fb_videomode *mode;
3257         struct fb_con2fbmap *con2fb;
3258         struct fb_blit_caps *caps;
3259         int idx, ret = 0;
3260
3261         /*
3262          * ignore all events except driver registration and deregistration
3263          * if fbcon is not active
3264          */
3265         if (fbcon_has_exited && !(action == FB_EVENT_FB_REGISTERED ||
3266                                   action == FB_EVENT_FB_UNREGISTERED))
3267                 goto done;
3268
3269         switch(action) {
3270         case FB_EVENT_SUSPEND:
3271                 fbcon_suspended(info);
3272                 break;
3273         case FB_EVENT_RESUME:
3274                 fbcon_resumed(info);
3275                 break;
3276         case FB_EVENT_MODE_CHANGE:
3277                 fbcon_modechanged(info);
3278                 break;
3279         case FB_EVENT_MODE_CHANGE_ALL:
3280                 fbcon_set_all_vcs(info);
3281                 break;
3282         case FB_EVENT_MODE_DELETE:
3283                 mode = event->data;
3284                 ret = fbcon_mode_deleted(info, mode);
3285                 break;
3286         case FB_EVENT_FB_UNBIND:
3287                 idx = info->node;
3288                 ret = fbcon_fb_unbind(idx);
3289                 break;
3290         case FB_EVENT_FB_REGISTERED:
3291                 ret = fbcon_fb_registered(info);
3292                 break;
3293         case FB_EVENT_FB_UNREGISTERED:
3294                 ret = fbcon_fb_unregistered(info);
3295                 break;
3296         case FB_EVENT_SET_CONSOLE_MAP:
3297                 /* called with console lock held */
3298                 con2fb = event->data;
3299                 ret = set_con2fb_map(con2fb->console - 1,
3300                                      con2fb->framebuffer, 1);
3301                 break;
3302         case FB_EVENT_GET_CONSOLE_MAP:
3303                 con2fb = event->data;
3304                 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
3305                 break;
3306         case FB_EVENT_BLANK:
3307                 fbcon_fb_blanked(info, *(int *)event->data);
3308                 break;
3309         case FB_EVENT_NEW_MODELIST:
3310                 fbcon_new_modelist(info);
3311                 break;
3312         case FB_EVENT_GET_REQ:
3313                 caps = event->data;
3314                 fbcon_get_requirement(info, caps);
3315                 break;
3316         case FB_EVENT_REMAP_ALL_CONSOLE:
3317                 idx = info->node;
3318                 fbcon_remap_all(idx);
3319                 break;
3320         }
3321 done:
3322         return ret;
3323 }
3324
3325 /*
3326  *  The console `switch' structure for the frame buffer based console
3327  */
3328
3329 static const struct consw fb_con = {
3330         .owner                  = THIS_MODULE,
3331         .con_startup            = fbcon_startup,
3332         .con_init               = fbcon_init,
3333         .con_deinit             = fbcon_deinit,
3334         .con_clear              = fbcon_clear,
3335         .con_putc               = fbcon_putc,
3336         .con_putcs              = fbcon_putcs,
3337         .con_cursor             = fbcon_cursor,
3338         .con_scroll             = fbcon_scroll,
3339         .con_bmove              = fbcon_bmove,
3340         .con_switch             = fbcon_switch,
3341         .con_blank              = fbcon_blank,
3342         .con_font_set           = fbcon_set_font,
3343         .con_font_get           = fbcon_get_font,
3344         .con_font_default       = fbcon_set_def_font,
3345         .con_font_copy          = fbcon_copy_font,
3346         .con_set_palette        = fbcon_set_palette,
3347         .con_scrolldelta        = fbcon_scrolldelta,
3348         .con_set_origin         = fbcon_set_origin,
3349         .con_invert_region      = fbcon_invert_region,
3350         .con_screen_pos         = fbcon_screen_pos,
3351         .con_getxy              = fbcon_getxy,
3352         .con_resize             = fbcon_resize,
3353         .con_debug_enter        = fbcon_debug_enter,
3354         .con_debug_leave        = fbcon_debug_leave,
3355 };
3356
3357 static struct notifier_block fbcon_event_notifier = {
3358         .notifier_call  = fbcon_event_notify,
3359 };
3360
3361 static ssize_t store_rotate(struct device *device,
3362                             struct device_attribute *attr, const char *buf,
3363                             size_t count)
3364 {
3365         struct fb_info *info;
3366         int rotate, idx;
3367         char **last = NULL;
3368
3369         if (fbcon_has_exited)
3370                 return count;
3371
3372         console_lock();
3373         idx = con2fb_map[fg_console];
3374
3375         if (idx == -1 || registered_fb[idx] == NULL)
3376                 goto err;
3377
3378         info = registered_fb[idx];
3379         rotate = simple_strtoul(buf, last, 0);
3380         fbcon_rotate(info, rotate);
3381 err:
3382         console_unlock();
3383         return count;
3384 }
3385
3386 static ssize_t store_rotate_all(struct device *device,
3387                                 struct device_attribute *attr,const char *buf,
3388                                 size_t count)
3389 {
3390         struct fb_info *info;
3391         int rotate, idx;
3392         char **last = NULL;
3393
3394         if (fbcon_has_exited)
3395                 return count;
3396
3397         console_lock();
3398         idx = con2fb_map[fg_console];
3399
3400         if (idx == -1 || registered_fb[idx] == NULL)
3401                 goto err;
3402
3403         info = registered_fb[idx];
3404         rotate = simple_strtoul(buf, last, 0);
3405         fbcon_rotate_all(info, rotate);
3406 err:
3407         console_unlock();
3408         return count;
3409 }
3410
3411 static ssize_t show_rotate(struct device *device,
3412                            struct device_attribute *attr,char *buf)
3413 {
3414         struct fb_info *info;
3415         int rotate = 0, idx;
3416
3417         if (fbcon_has_exited)
3418                 return 0;
3419
3420         console_lock();
3421         idx = con2fb_map[fg_console];
3422
3423         if (idx == -1 || registered_fb[idx] == NULL)
3424                 goto err;
3425
3426         info = registered_fb[idx];
3427         rotate = fbcon_get_rotate(info);
3428 err:
3429         console_unlock();
3430         return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3431 }
3432
3433 static ssize_t show_cursor_blink(struct device *device,
3434                                  struct device_attribute *attr, char *buf)
3435 {
3436         struct fb_info *info;
3437         struct fbcon_ops *ops;
3438         int idx, blink = -1;
3439
3440         if (fbcon_has_exited)
3441                 return 0;
3442
3443         console_lock();
3444         idx = con2fb_map[fg_console];
3445
3446         if (idx == -1 || registered_fb[idx] == NULL)
3447                 goto err;
3448
3449         info = registered_fb[idx];
3450         ops = info->fbcon_par;
3451
3452         if (!ops)
3453                 goto err;
3454
3455         blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0;
3456 err:
3457         console_unlock();
3458         return snprintf(buf, PAGE_SIZE, "%d\n", blink);
3459 }
3460
3461 static ssize_t store_cursor_blink(struct device *device,
3462                                   struct device_attribute *attr,
3463                                   const char *buf, size_t count)
3464 {
3465         struct fb_info *info;
3466         int blink, idx;
3467         char **last = NULL;
3468
3469         if (fbcon_has_exited)
3470                 return count;
3471
3472         console_lock();
3473         idx = con2fb_map[fg_console];
3474
3475         if (idx == -1 || registered_fb[idx] == NULL)
3476                 goto err;
3477
3478         info = registered_fb[idx];
3479
3480         if (!info->fbcon_par)
3481                 goto err;
3482
3483         blink = simple_strtoul(buf, last, 0);
3484
3485         if (blink) {
3486                 fbcon_cursor_noblink = 0;
3487                 fbcon_add_cursor_timer(info);
3488         } else {
3489                 fbcon_cursor_noblink = 1;
3490                 fbcon_del_cursor_timer(info);
3491         }
3492
3493 err:
3494         console_unlock();
3495         return count;
3496 }
3497
3498 static struct device_attribute device_attrs[] = {
3499         __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3500         __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3501         __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink,
3502                store_cursor_blink),
3503 };
3504
3505 static int fbcon_init_device(void)
3506 {
3507         int i, error = 0;
3508
3509         fbcon_has_sysfs = 1;
3510
3511         for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3512                 error = device_create_file(fbcon_device, &device_attrs[i]);
3513
3514                 if (error)
3515                         break;
3516         }
3517
3518         if (error) {
3519                 while (--i >= 0)
3520                         device_remove_file(fbcon_device, &device_attrs[i]);
3521
3522                 fbcon_has_sysfs = 0;
3523         }
3524
3525         return 0;
3526 }
3527
3528 static void fbcon_start(void)
3529 {
3530         if (num_registered_fb) {
3531                 int i;
3532
3533                 console_lock();
3534
3535                 for (i = 0; i < FB_MAX; i++) {
3536                         if (registered_fb[i] != NULL) {
3537                                 info_idx = i;
3538                                 break;
3539                         }
3540                 }
3541
3542                 do_fbcon_takeover(0);
3543                 console_unlock();
3544
3545         }
3546 }
3547
3548 static void fbcon_exit(void)
3549 {
3550         struct fb_info *info;
3551         int i, j, mapped;
3552
3553         if (fbcon_has_exited)
3554                 return;
3555
3556         kfree((void *)softback_buf);
3557         softback_buf = 0UL;
3558
3559         for (i = 0; i < FB_MAX; i++) {
3560                 int pending = 0;
3561
3562                 mapped = 0;
3563                 info = registered_fb[i];
3564
3565                 if (info == NULL)
3566                         continue;
3567
3568                 if (info->queue.func)
3569                         pending = cancel_work_sync(&info->queue);
3570                 DPRINTK("fbcon: %s pending work\n", (pending ? "canceled" :
3571                         "no"));
3572
3573                 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3574                         if (con2fb_map[j] == i) {
3575                                 mapped = 1;
3576                                 break;
3577                         }
3578                 }
3579
3580                 if (mapped) {
3581                         if (info->fbops->fb_release)
3582                                 info->fbops->fb_release(info, 0);
3583                         module_put(info->fbops->owner);
3584
3585                         if (info->fbcon_par) {
3586                                 struct fbcon_ops *ops = info->fbcon_par;
3587
3588                                 fbcon_del_cursor_timer(info);
3589                                 kfree(ops->cursor_src);
3590                                 kfree(ops->cursor_state.mask);
3591                                 kfree(info->fbcon_par);
3592                                 info->fbcon_par = NULL;
3593                         }
3594
3595                         if (info->queue.func == fb_flashcursor)
3596                                 info->queue.func = NULL;
3597                 }
3598         }
3599
3600         fbcon_has_exited = 1;
3601 }
3602
3603 static int __init fb_console_init(void)
3604 {
3605         int i;
3606
3607         console_lock();
3608         fb_register_client(&fbcon_event_notifier);
3609         fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL,
3610                                      "fbcon");
3611
3612         if (IS_ERR(fbcon_device)) {
3613                 printk(KERN_WARNING "Unable to create device "
3614                        "for fbcon; errno = %ld\n",
3615                        PTR_ERR(fbcon_device));
3616                 fbcon_device = NULL;
3617         } else
3618                 fbcon_init_device();
3619
3620         for (i = 0; i < MAX_NR_CONSOLES; i++)
3621                 con2fb_map[i] = -1;
3622
3623         console_unlock();
3624         fbcon_start();
3625         return 0;
3626 }
3627
3628 fs_initcall(fb_console_init);
3629
3630 #ifdef MODULE
3631
3632 static void __exit fbcon_deinit_device(void)
3633 {
3634         int i;
3635
3636         if (fbcon_has_sysfs) {
3637                 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3638                         device_remove_file(fbcon_device, &device_attrs[i]);
3639
3640                 fbcon_has_sysfs = 0;
3641         }
3642 }
3643
3644 static void __exit fb_console_exit(void)
3645 {
3646         console_lock();
3647         fb_unregister_client(&fbcon_event_notifier);
3648         fbcon_deinit_device();
3649         device_destroy(fb_class, MKDEV(0, 0));
3650         fbcon_exit();
3651         do_unregister_con_driver(&fb_con);
3652         console_unlock();
3653 }
3654
3655 module_exit(fb_console_exit);
3656
3657 #endif
3658
3659 MODULE_LICENSE("GPL");