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