drivers/video/console/fbcon.c

   1 /*
   2  *  linux/drivers/video/fbcon.c -- Low level frame buffer based console driver
   3  *
   4  *      Copyright (C) 1995 Geert Uytterhoeven
   5  *
   6  *
   7  *  This file is based on the original Amiga console driver (amicon.c):
   8  *
   9  *      Copyright (C) 1993 Hamish Macdonald
  10  *                         Greg Harp
  11  *      Copyright (C) 1994 David Carter [carter@compsci.bristol.ac.uk]
  12  *
  13  *            with work by William Rucklidge (wjr@cs.cornell.edu)
  14  *                         Geert Uytterhoeven
  15  *                         Jes Sorensen (jds@kom.auc.dk)
  16  *                         Martin Apel
  17  *
  18  *  and on the original Atari console driver (atacon.c):
  19  *
  20  *      Copyright (C) 1993 Bjoern Brauel
  21  *                         Roman Hodek
  22  *
  23  *            with work by Guenther Kelleter
  24  *                         Martin Schaller
  25  *                         Andreas Schwab
  26  *
  27  *  Hardware cursor support added by Emmanuel Marty (core@ggi-project.org)
  28  *  Smart redraw scrolling, arbitrary font width support, 512char font support
  29  *  and software scrollback added by
  30  *                         Jakub Jelinek (jj@ultra.linux.cz)
  31  *
  32  *  Random hacking by Martin Mares <mj@ucw.cz>
  33  *
  34  *      2001 - Documented with DocBook
  35  *      - Brad Douglas <brad@neruo.com>
  36  *
  37  *  The low level operations for the various display memory organizations are
  38  *  now in separate source files.
  39  *
  40  *  Currently the following organizations are supported:
  41  *
  42  *    o afb                     Amiga bitplanes
  43  *    o cfb{2,4,8,16,24,32}     Packed pixels
  44  *    o ilbm                    Amiga interleaved bitplanes
  45  *    o iplan2p[248]            Atari interleaved bitplanes
  46  *    o mfb                     Monochrome
  47  *    o vga                     VGA characters/attributes
  48  *
  49  *  To do:
  50  *
  51  *    - Implement 16 plane mode (iplan2p16)
  52  *
  53  *
  54  *  This file is subject to the terms and conditions of the GNU General Public
  55  *  License.  See the file COPYING in the main directory of this archive for
  56  *  more details.
  57  */
  58
  59 #undef FBCONDEBUG
  60
  61 #include <linux/module.h>
  62 #include <linux/types.h>
  63 #include <linux/fs.h>
  64 #include <linux/kernel.h>
  65 #include <linux/delay.h>        /* MSch: for IRQ probe */
  66 #include <linux/console.h>
  67 #include <linux/string.h>
  68 #include <linux/kd.h>
  69 #include <linux/slab.h>
  70 #include <linux/fb.h>
  71 #include <linux/vt_kern.h>
  72 #include <linux/selection.h>
  73 #include <linux/font.h>
  74 #include <linux/smp.h>
  75 #include <linux/init.h>
  76 #include <linux/interrupt.h>
  77 #include <linux/crc32.h> /* For counting font checksums */
  78 #include <asm/fb.h>
  79 #include <asm/irq.h>
  80
  81 #include "fbcon.h"
  82
  83 #ifdef FBCONDEBUG
  84 #  define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __func__ , ## args)
  85 #else
  86 #  define DPRINTK(fmt, args...)
  87 #endif
  88
  89 enum {
  90         FBCON_LOGO_CANSHOW      = -1,   /* the logo can be shown */
  91         FBCON_LOGO_DRAW         = -2,   /* draw the logo to a console */
  92         FBCON_LOGO_DONTSHOW     = -3    /* do not show the logo */
  93 };
  94
  95 static struct display fb_display[MAX_NR_CONSOLES];
  96
  97 static signed char con2fb_map[MAX_NR_CONSOLES];
  98 static signed char con2fb_map_boot[MAX_NR_CONSOLES];
  99
 100 static int logo_lines;
 101 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
 102    enums.  */
 103 static int logo_shown = FBCON_LOGO_CANSHOW;
 104 /* Software scrollback */
 105 static int fbcon_softback_size = 32768;
 106 static unsigned long softback_buf, softback_curr;
 107 static unsigned long softback_in;
 108 static unsigned long softback_top, softback_end;
 109 static int softback_lines;
 110 /* console mappings */
 111 static int first_fb_vc;
 112 static int last_fb_vc = MAX_NR_CONSOLES - 1;
 113 static int fbcon_is_default = 1;
 114 static int fbcon_has_exited;
 115 static int primary_device = -1;
 116 static int fbcon_has_console_bind;
 117
 118 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
 119 static int map_override;
 120
 121 static inline void fbcon_map_override(void)
 122 {
 123         map_override = 1;
 124 }
 125 #else
 126 static inline void fbcon_map_override(void)
 127 {
 128 }
 129 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY */
 130
 131 /* font data */
 132 static char fontname[40];
 133
 134 /* current fb_info */
 135 static int info_idx = -1;
 136
 137 /* console rotation */
 138 static int initial_rotation;
 139 static int fbcon_has_sysfs;
 140
 141 static const struct consw fb_con;
 142
 143 #define CM_SOFTBACK     (8)
 144
 145 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
 146
 147 static int fbcon_set_origin(struct vc_data *);
 148
 149 #define CURSOR_DRAW_DELAY               (1)
 150
 151 static int vbl_cursor_cnt;
 152 static int fbcon_cursor_noblink;
 153
 154 #define divides(a, b)   ((!(a) || (b)%(a)) ? 0 : 1)
 155
 156 /*
 157  *  Interface used by the world
 158  */
 159
 160 static const char *fbcon_startup(void);
 161 static void fbcon_init(struct vc_data *vc, int init);
 162 static void fbcon_deinit(struct vc_data *vc);
 163 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
 164                         int width);
 165 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
 166 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
 167                         int count, int ypos, int xpos);
 168 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
 169 static void fbcon_cursor(struct vc_data *vc, int mode);
 170 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
 171                         int count);
 172 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
 173                         int height, int width);
 174 static int fbcon_switch(struct vc_data *vc);
 175 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
 176 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table);
 177 static int fbcon_scrolldelta(struct vc_data *vc, int lines);
 178
 179 /*
 180  *  Internal routines
 181  */
 182 static __inline__ void ywrap_up(struct vc_data *vc, int count);
 183 static __inline__ void ywrap_down(struct vc_data *vc, int count);
 184 static __inline__ void ypan_up(struct vc_data *vc, int count);
 185 static __inline__ void ypan_down(struct vc_data *vc, int count);
 186 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
 187                             int dy, int dx, int height, int width, u_int y_break);
 188 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
 189                            int unit);
 190 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
 191                               int line, int count, int dy);
 192 static void fbcon_modechanged(struct fb_info *info);
 193 static void fbcon_set_all_vcs(struct fb_info *info);
 194 static void fbcon_start(void);
 195 static void fbcon_exit(void);
 196 static struct device *fbcon_device;
 197
 198 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
 199 static inline void fbcon_set_rotation(struct fb_info *info)
 200 {
 201         struct fbcon_ops *ops = info->fbcon_par;
 202
 203         if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
 204             ops->p->con_rotate < 4)
 205                 ops->rotate = ops->p->con_rotate;
 206         else
 207                 ops->rotate = 0;
 208 }
 209
 210 static void fbcon_rotate(struct fb_info *info, u32 rotate)
 211 {
 212         struct fbcon_ops *ops= info->fbcon_par;
 213         struct fb_info *fb_info;
 214
 215         if (!ops || ops->currcon == -1)
 216                 return;
 217
 218         fb_info = registered_fb[con2fb_map[ops->currcon]];
 219
 220         if (info == fb_info) {
 221                 struct display *p = &fb_display[ops->currcon];
 222
 223                 if (rotate < 4)
 224                         p->con_rotate = rotate;
 225                 else
 226                         p->con_rotate = 0;
 227
 228                 fbcon_modechanged(info);
 229         }
 230 }
 231
 232 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
 233 {
 234         struct fbcon_ops *ops = info->fbcon_par;
 235         struct vc_data *vc;
 236         struct display *p;
 237         int i;
 238
 239         if (!ops || ops->currcon < 0 || rotate > 3)
 240                 return;
 241
 242         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 243                 vc = vc_cons[i].d;
 244                 if (!vc || vc->vc_mode != KD_TEXT ||
 245                     registered_fb[con2fb_map[i]] != info)
 246                         continue;
 247
 248                 p = &fb_display[vc->vc_num];
 249                 p->con_rotate = rotate;
 250         }
 251
 252         fbcon_set_all_vcs(info);
 253 }
 254 #else
 255 static inline void fbcon_set_rotation(struct fb_info *info)
 256 {
 257         struct fbcon_ops *ops = info->fbcon_par;
 258
 259         ops->rotate = FB_ROTATE_UR;
 260 }
 261
 262 static void fbcon_rotate(struct fb_info *info, u32 rotate)
 263 {
 264         return;
 265 }
 266
 267 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
 268 {
 269         return;
 270 }
 271 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
 272
 273 static int fbcon_get_rotate(struct fb_info *info)
 274 {
 275         struct fbcon_ops *ops = info->fbcon_par;
 276
 277         return (ops) ? ops->rotate : 0;
 278 }
 279
 280 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
 281 {
 282         struct fbcon_ops *ops = info->fbcon_par;
 283
 284         return (info->state != FBINFO_STATE_RUNNING ||
 285                 vc->vc_mode != KD_TEXT || ops->graphics) &&
 286                 !vt_force_oops_output(vc);
 287 }
 288
 289 static int get_color(struct vc_data *vc, struct fb_info *info,
 290               u16 c, int is_fg)
 291 {
 292         int depth = fb_get_color_depth(&info->var, &info->fix);
 293         int color = 0;
 294
 295         if (console_blanked) {
 296                 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
 297
 298                 c = vc->vc_video_erase_char & charmask;
 299         }
 300
 301         if (depth != 1)
 302                 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
 303                         : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
 304
 305         switch (depth) {
 306         case 1:
 307         {
 308                 int col = mono_col(info);
 309                 /* 0 or 1 */
 310                 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
 311                 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
 312
 313                 if (console_blanked)
 314                         fg = bg;
 315
 316                 color = (is_fg) ? fg : bg;
 317                 break;
 318         }
 319         case 2:
 320                 /*
 321                  * Scale down 16-colors to 4 colors. Default 4-color palette
 322                  * is grayscale. However, simply dividing the values by 4
 323                  * will not work, as colors 1, 2 and 3 will be scaled-down
 324                  * to zero rendering them invisible.  So empirically convert
 325                  * colors to a sane 4-level grayscale.
 326                  */
 327                 switch (color) {
 328                 case 0:
 329                         color = 0; /* black */
 330                         break;
 331                 case 1 ... 6:
 332                         color = 2; /* white */
 333                         break;
 334                 case 7 ... 8:
 335                         color = 1; /* gray */
 336                         break;
 337                 default:
 338                         color = 3; /* intense white */
 339                         break;
 340                 }
 341                 break;
 342         case 3:
 343                 /*
 344                  * Last 8 entries of default 16-color palette is a more intense
 345                  * version of the first 8 (i.e., same chrominance, different
 346                  * luminance).
 347                  */
 348                 color &= 7;
 349                 break;
 350         }
 351
 352
 353         return color;
 354 }
 355
 356 static void fbcon_update_softback(struct vc_data *vc)
 357 {
 358         int l = fbcon_softback_size / vc->vc_size_row;
 359
 360         if (l > 5)
 361                 softback_end = softback_buf + l * vc->vc_size_row;
 362         else
 363                 /* Smaller scrollback makes no sense, and 0 would screw
 364                    the operation totally */
 365                 softback_top = 0;
 366 }
 367
 368 static void fb_flashcursor(struct work_struct *work)
 369 {
 370         struct fb_info *info = container_of(work, struct fb_info, queue);
 371         struct fbcon_ops *ops = info->fbcon_par;
 372         struct vc_data *vc = NULL;
 373         int c;
 374         int mode;
 375         int ret;
 376
 377         /* FIXME: we should sort out the unbind locking instead */
 378         /* instead we just fail to flash the cursor if we can't get
 379          * the lock instead of blocking fbcon deinit */
 380         ret = console_trylock();
 381         if (ret == 0)
 382                 return;
 383
 384         if (ops && ops->currcon != -1)
 385                 vc = vc_cons[ops->currcon].d;
 386
 387         if (!vc || !CON_IS_VISIBLE(vc) ||
 388             registered_fb[con2fb_map[vc->vc_num]] != info ||
 389             vc->vc_deccm != 1) {
 390                 console_unlock();
 391                 return;
 392         }
 393
 394         c = scr_readw((u16 *) vc->vc_pos);
 395         mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
 396                 CM_ERASE : CM_DRAW;
 397         ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
 398                     get_color(vc, info, c, 0));
 399         console_unlock();
 400 }
 401
 402 static void cursor_timer_handler(unsigned long dev_addr)
 403 {
 404         struct fb_info *info = (struct fb_info *) dev_addr;
 405         struct fbcon_ops *ops = info->fbcon_par;
 406
 407         queue_work(system_power_efficient_wq, &info->queue);
 408         mod_timer(&ops->cursor_timer, jiffies + HZ/5);
 409 }
 410
 411 static void fbcon_add_cursor_timer(struct fb_info *info)
 412 {
 413         struct fbcon_ops *ops = info->fbcon_par;
 414
 415         if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
 416             !(ops->flags & FBCON_FLAGS_CURSOR_TIMER) &&
 417             !fbcon_cursor_noblink) {
 418                 if (!info->queue.func)
 419                         INIT_WORK(&info->queue, fb_flashcursor);
 420
 421                 init_timer(&ops->cursor_timer);
 422                 ops->cursor_timer.function = cursor_timer_handler;
 423                 ops->cursor_timer.expires = jiffies + HZ / 5;
 424                 ops->cursor_timer.data = (unsigned long ) info;
 425                 add_timer(&ops->cursor_timer);
 426                 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
 427         }
 428 }
 429
 430 static void fbcon_del_cursor_timer(struct fb_info *info)
 431 {
 432         struct fbcon_ops *ops = info->fbcon_par;
 433
 434         if (info->queue.func == fb_flashcursor &&
 435             ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
 436                 del_timer_sync(&ops->cursor_timer);
 437                 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
 438         }
 439 }
 440
 441 #ifndef MODULE
 442 static int __init fb_console_setup(char *this_opt)
 443 {
 444         char *options;
 445         int i, j;
 446
 447         if (!this_opt || !*this_opt)
 448                 return 1;
 449
 450         while ((options = strsep(&this_opt, ",")) != NULL) {
 451                 if (!strncmp(options, "font:", 5)) {
 452                         strlcpy(fontname, options + 5, sizeof(fontname));
 453                         continue;
 454                 }
 455
 456                 if (!strncmp(options, "scrollback:", 11)) {
 457                         options += 11;
 458                         if (*options) {
 459                                 fbcon_softback_size = simple_strtoul(options, &options, 0);
 460                                 if (*options == 'k' || *options == 'K') {
 461                                         fbcon_softback_size *= 1024;
 462                                 }
 463                         }
 464                         continue;
 465                 }
 466
 467                 if (!strncmp(options, "map:", 4)) {
 468                         options += 4;
 469                         if (*options) {
 470                                 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
 471                                         if (!options[j])
 472                                                 j = 0;
 473                                         con2fb_map_boot[i] =
 474                                                 (options[j++]-'0') % FB_MAX;
 475                                 }
 476
 477                                 fbcon_map_override();
 478                         }
 479                         continue;
 480                 }
 481
 482                 if (!strncmp(options, "vc:", 3)) {
 483                         options += 3;
 484                         if (*options)
 485                                 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
 486                         if (first_fb_vc < 0)
 487                                 first_fb_vc = 0;
 488                         if (*options++ == '-')
 489                                 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
 490                         fbcon_is_default = 0;
 491                         continue;
 492                 }
 493
 494                 if (!strncmp(options, "rotate:", 7)) {
 495                         options += 7;
 496                         if (*options)
 497                                 initial_rotation = simple_strtoul(options, &options, 0);
 498                         if (initial_rotation > 3)
 499                                 initial_rotation = 0;
 500                         continue;
 501                 }
 502         }
 503         return 1;
 504 }
 505
 506 __setup("fbcon=", fb_console_setup);
 507 #endif
 508
 509 static int search_fb_in_map(int idx)
 510 {
 511         int i, retval = 0;
 512
 513         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 514                 if (con2fb_map[i] == idx)
 515                         retval = 1;
 516         }
 517         return retval;
 518 }
 519
 520 static int search_for_mapped_con(void)
 521 {
 522         int i, retval = 0;
 523
 524         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 525                 if (con2fb_map[i] != -1)
 526                         retval = 1;
 527         }
 528         return retval;
 529 }
 530
 531 static int do_fbcon_takeover(int show_logo)
 532 {
 533         int err, i;
 534
 535         if (!num_registered_fb)
 536                 return -ENODEV;
 537
 538         if (!show_logo)
 539                 logo_shown = FBCON_LOGO_DONTSHOW;
 540
 541         for (i = first_fb_vc; i <= last_fb_vc; i++)
 542                 con2fb_map[i] = info_idx;
 543
 544         err = do_take_over_console(&fb_con, first_fb_vc, last_fb_vc,
 545                                 fbcon_is_default);
 546
 547         if (err) {
 548                 for (i = first_fb_vc; i <= last_fb_vc; i++)
 549                         con2fb_map[i] = -1;
 550                 info_idx = -1;
 551         } else {
 552                 fbcon_has_console_bind = 1;
 553         }
 554
 555         return err;
 556 }
 557
 558 #ifdef MODULE
 559 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
 560                                int cols, int rows, int new_cols, int new_rows)
 561 {
 562         logo_shown = FBCON_LOGO_DONTSHOW;
 563 }
 564 #else
 565 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
 566                                int cols, int rows, int new_cols, int new_rows)
 567 {
 568         /* Need to make room for the logo */
 569         struct fbcon_ops *ops = info->fbcon_par;
 570         int cnt, erase = vc->vc_video_erase_char, step;
 571         unsigned short *save = NULL, *r, *q;
 572         int logo_height;
 573
 574         if (info->flags & FBINFO_MODULE) {
 575                 logo_shown = FBCON_LOGO_DONTSHOW;
 576                 return;
 577         }
 578
 579         /*
 580          * remove underline attribute from erase character
 581          * if black and white framebuffer.
 582          */
 583         if (fb_get_color_depth(&info->var, &info->fix) == 1)
 584                 erase &= ~0x400;
 585         logo_height = fb_prepare_logo(info, ops->rotate);
 586         logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height);
 587         q = (unsigned short *) (vc->vc_origin +
 588                                 vc->vc_size_row * rows);
 589         step = logo_lines * cols;
 590         for (r = q - logo_lines * cols; r < q; r++)
 591                 if (scr_readw(r) != vc->vc_video_erase_char)
 592                         break;
 593         if (r != q && new_rows >= rows + logo_lines) {
 594                 save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
 595                 if (save) {
 596                         int i = cols < new_cols ? cols : new_cols;
 597                         scr_memsetw(save, erase, logo_lines * new_cols * 2);
 598                         r = q - step;
 599                         for (cnt = 0; cnt < logo_lines; cnt++, r += i)
 600                                 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
 601                         r = q;
 602                 }
 603         }
 604         if (r == q) {
 605                 /* We can scroll screen down */
 606                 r = q - step - cols;
 607                 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
 608                         scr_memcpyw(r + step, r, vc->vc_size_row);
 609                         r -= cols;
 610                 }
 611                 if (!save) {
 612                         int lines;
 613                         if (vc->vc_y + logo_lines >= rows)
 614                                 lines = rows - vc->vc_y - 1;
 615                         else
 616                                 lines = logo_lines;
 617                         vc->vc_y += lines;
 618                         vc->vc_pos += lines * vc->vc_size_row;
 619                 }
 620         }
 621         scr_memsetw((unsigned short *) vc->vc_origin,
 622                     erase,
 623                     vc->vc_size_row * logo_lines);
 624
 625         if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
 626                 fbcon_clear_margins(vc, 0);
 627                 update_screen(vc);
 628         }
 629
 630         if (save) {
 631                 q = (unsigned short *) (vc->vc_origin +
 632                                         vc->vc_size_row *
 633                                         rows);
 634                 scr_memcpyw(q, save, logo_lines * new_cols * 2);
 635                 vc->vc_y += logo_lines;
 636                 vc->vc_pos += logo_lines * vc->vc_size_row;
 637                 kfree(save);
 638         }
 639
 640         if (logo_lines > vc->vc_bottom) {
 641                 logo_shown = FBCON_LOGO_CANSHOW;
 642                 printk(KERN_INFO
 643                        "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
 644         } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
 645                 logo_shown = FBCON_LOGO_DRAW;
 646                 vc->vc_top = logo_lines;
 647         }
 648 }
 649 #endif /* MODULE */
 650
 651 #ifdef CONFIG_FB_TILEBLITTING
 652 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
 653 {
 654         struct fbcon_ops *ops = info->fbcon_par;
 655
 656         ops->p = &fb_display[vc->vc_num];
 657
 658         if ((info->flags & FBINFO_MISC_TILEBLITTING))
 659                 fbcon_set_tileops(vc, info);
 660         else {
 661                 fbcon_set_rotation(info);
 662                 fbcon_set_bitops(ops);
 663         }
 664 }
 665
 666 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
 667 {
 668         int err = 0;
 669
 670         if (info->flags & FBINFO_MISC_TILEBLITTING &&
 671             info->tileops->fb_get_tilemax(info) < charcount)
 672                 err = 1;
 673
 674         return err;
 675 }
 676 #else
 677 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
 678 {
 679         struct fbcon_ops *ops = info->fbcon_par;
 680
 681         info->flags &= ~FBINFO_MISC_TILEBLITTING;
 682         ops->p = &fb_display[vc->vc_num];
 683         fbcon_set_rotation(info);
 684         fbcon_set_bitops(ops);
 685 }
 686
 687 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
 688 {
 689         return 0;
 690 }
 691
 692 #endif /* CONFIG_MISC_TILEBLITTING */
 693
 694
 695 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
 696                                   int unit, int oldidx)
 697 {
 698         struct fbcon_ops *ops = NULL;
 699         int err = 0;
 700
 701         if (!try_module_get(info->fbops->owner))
 702                 err = -ENODEV;
 703
 704         if (!err && info->fbops->fb_open &&
 705             info->fbops->fb_open(info, 0))
 706                 err = -ENODEV;
 707
 708         if (!err) {
 709                 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
 710                 if (!ops)
 711                         err = -ENOMEM;
 712         }
 713
 714         if (!err) {
 715                 info->fbcon_par = ops;
 716
 717                 if (vc)
 718                         set_blitting_type(vc, info);
 719         }
 720
 721         if (err) {
 722                 con2fb_map[unit] = oldidx;
 723                 module_put(info->fbops->owner);
 724         }
 725
 726         return err;
 727 }
 728
 729 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
 730                                   struct fb_info *newinfo, int unit,
 731                                   int oldidx, int found)
 732 {
 733         struct fbcon_ops *ops = oldinfo->fbcon_par;
 734         int err = 0, ret;
 735
 736         if (oldinfo->fbops->fb_release &&
 737             oldinfo->fbops->fb_release(oldinfo, 0)) {
 738                 con2fb_map[unit] = oldidx;
 739                 if (!found && newinfo->fbops->fb_release)
 740                         newinfo->fbops->fb_release(newinfo, 0);
 741                 if (!found)
 742                         module_put(newinfo->fbops->owner);
 743                 err = -ENODEV;
 744         }
 745
 746         if (!err) {
 747                 fbcon_del_cursor_timer(oldinfo);
 748                 kfree(ops->cursor_state.mask);
 749                 kfree(ops->cursor_data);
 750                 kfree(ops->cursor_src);
 751                 kfree(ops->fontbuffer);
 752                 kfree(oldinfo->fbcon_par);
 753                 oldinfo->fbcon_par = NULL;
 754                 module_put(oldinfo->fbops->owner);
 755                 /*
 756                   If oldinfo and newinfo are driving the same hardware,
 757                   the fb_release() method of oldinfo may attempt to
 758                   restore the hardware state.  This will leave the
 759                   newinfo in an undefined state. Thus, a call to
 760                   fb_set_par() may be needed for the newinfo.
 761                 */
 762                 if (newinfo && newinfo->fbops->fb_set_par) {
 763                         ret = newinfo->fbops->fb_set_par(newinfo);
 764
 765                         if (ret)
 766                                 printk(KERN_ERR "con2fb_release_oldinfo: "
 767                                         "detected unhandled fb_set_par error, "
 768                                         "error code %d\n", ret);
 769                 }
 770         }
 771
 772         return err;
 773 }
 774
 775 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
 776                                 int unit, int show_logo)
 777 {
 778         struct fbcon_ops *ops = info->fbcon_par;
 779         int ret;
 780
 781         ops->currcon = fg_console;
 782
 783         if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT)) {
 784                 ret = info->fbops->fb_set_par(info);
 785
 786                 if (ret)
 787                         printk(KERN_ERR "con2fb_init_display: detected "
 788                                 "unhandled fb_set_par error, "
 789                                 "error code %d\n", ret);
 790         }
 791
 792         ops->flags |= FBCON_FLAGS_INIT;
 793         ops->graphics = 0;
 794         fbcon_set_disp(info, &info->var, unit);
 795
 796         if (show_logo) {
 797                 struct vc_data *fg_vc = vc_cons[fg_console].d;
 798                 struct fb_info *fg_info =
 799                         registered_fb[con2fb_map[fg_console]];
 800
 801                 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
 802                                    fg_vc->vc_rows, fg_vc->vc_cols,
 803                                    fg_vc->vc_rows);
 804         }
 805
 806         update_screen(vc_cons[fg_console].d);
 807 }
 808
 809 /**
 810  *      set_con2fb_map - map console to frame buffer device
 811  *      @unit: virtual console number to map
 812  *      @newidx: frame buffer index to map virtual console to
 813  *      @user: user request
 814  *
 815  *      Maps a virtual console @unit to a frame buffer device
 816  *      @newidx.
 817  *
 818  *      This should be called with the console lock held.
 819  */
 820 static int set_con2fb_map(int unit, int newidx, int user)
 821 {
 822         struct vc_data *vc = vc_cons[unit].d;
 823         int oldidx = con2fb_map[unit];
 824         struct fb_info *info = registered_fb[newidx];
 825         struct fb_info *oldinfo = NULL;
 826         int found, err = 0;
 827
 828         if (oldidx == newidx)
 829                 return 0;
 830
 831         if (!info)
 832                 return -EINVAL;
 833
 834         if (!search_for_mapped_con() || !con_is_bound(&fb_con)) {
 835                 info_idx = newidx;
 836                 return do_fbcon_takeover(0);
 837         }
 838
 839         if (oldidx != -1)
 840                 oldinfo = registered_fb[oldidx];
 841
 842         found = search_fb_in_map(newidx);
 843
 844         con2fb_map[unit] = newidx;
 845         if (!err && !found)
 846                 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
 847
 848
 849         /*
 850          * If old fb is not mapped to any of the consoles,
 851          * fbcon should release it.
 852          */
 853         if (!err && oldinfo && !search_fb_in_map(oldidx))
 854                 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
 855                                              found);
 856
 857         if (!err) {
 858                 int show_logo = (fg_console == 0 && !user &&
 859                                  logo_shown != FBCON_LOGO_DONTSHOW);
 860
 861                 if (!found)
 862                         fbcon_add_cursor_timer(info);
 863                 con2fb_map_boot[unit] = newidx;
 864                 con2fb_init_display(vc, info, unit, show_logo);
 865         }
 866
 867         if (!search_fb_in_map(info_idx))
 868                 info_idx = newidx;
 869
 870         return err;
 871 }
 872
 873 /*
 874  *  Low Level Operations
 875  */
 876 /* NOTE: fbcon cannot be __init: it may be called from do_take_over_console later */
 877 static int var_to_display(struct display *disp,
 878                           struct fb_var_screeninfo *var,
 879                           struct fb_info *info)
 880 {
 881         disp->xres_virtual = var->xres_virtual;
 882         disp->yres_virtual = var->yres_virtual;
 883         disp->bits_per_pixel = var->bits_per_pixel;
 884         disp->grayscale = var->grayscale;
 885         disp->nonstd = var->nonstd;
 886         disp->accel_flags = var->accel_flags;
 887         disp->height = var->height;
 888         disp->width = var->width;
 889         disp->red = var->red;
 890         disp->green = var->green;
 891         disp->blue = var->blue;
 892         disp->transp = var->transp;
 893         disp->rotate = var->rotate;
 894         disp->mode = fb_match_mode(var, &info->modelist);
 895         if (disp->mode == NULL)
 896                 /* This should not happen */
 897                 return -EINVAL;
 898         return 0;
 899 }
 900
 901 static void display_to_var(struct fb_var_screeninfo *var,
 902                            struct display *disp)
 903 {
 904         fb_videomode_to_var(var, disp->mode);
 905         var->xres_virtual = disp->xres_virtual;
 906         var->yres_virtual = disp->yres_virtual;
 907         var->bits_per_pixel = disp->bits_per_pixel;
 908         var->grayscale = disp->grayscale;
 909         var->nonstd = disp->nonstd;
 910         var->accel_flags = disp->accel_flags;
 911         var->height = disp->height;
 912         var->width = disp->width;
 913         var->red = disp->red;
 914         var->green = disp->green;
 915         var->blue = disp->blue;
 916         var->transp = disp->transp;
 917         var->rotate = disp->rotate;
 918 }
 919
 920 static const char *fbcon_startup(void)
 921 {
 922         const char *display_desc = "frame buffer device";
 923         struct display *p = &fb_display[fg_console];
 924         struct vc_data *vc = vc_cons[fg_console].d;
 925         const struct font_desc *font = NULL;
 926         struct module *owner;
 927         struct fb_info *info = NULL;
 928         struct fbcon_ops *ops;
 929         int rows, cols;
 930
 931         /*
 932          *  If num_registered_fb is zero, this is a call for the dummy part.
 933          *  The frame buffer devices weren't initialized yet.
 934          */
 935         if (!num_registered_fb || info_idx == -1)
 936                 return display_desc;
 937         /*
 938          * Instead of blindly using registered_fb[0], we use info_idx, set by
 939          * fb_console_init();
 940          */
 941         info = registered_fb[info_idx];
 942         if (!info)
 943                 return NULL;
 944
 945         owner = info->fbops->owner;
 946         if (!try_module_get(owner))
 947                 return NULL;
 948         if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
 949                 module_put(owner);
 950                 return NULL;
 951         }
 952
 953         ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
 954         if (!ops) {
 955                 module_put(owner);
 956                 return NULL;
 957         }
 958
 959         ops->currcon = -1;
 960         ops->graphics = 1;
 961         ops->cur_rotate = -1;
 962         info->fbcon_par = ops;
 963         p->con_rotate = initial_rotation;
 964         set_blitting_type(vc, info);
 965
 966         if (info->fix.type != FB_TYPE_TEXT) {
 967                 if (fbcon_softback_size) {
 968                         if (!softback_buf) {
 969                                 softback_buf =
 970                                     (unsigned long)
 971                                     kmalloc(fbcon_softback_size,
 972                                             GFP_KERNEL);
 973                                 if (!softback_buf) {
 974                                         fbcon_softback_size = 0;
 975                                         softback_top = 0;
 976                                 }
 977                         }
 978                 } else {
 979                         if (softback_buf) {
 980                                 kfree((void *) softback_buf);
 981                                 softback_buf = 0;
 982                                 softback_top = 0;
 983                         }
 984                 }
 985                 if (softback_buf)
 986                         softback_in = softback_top = softback_curr =
 987                             softback_buf;
 988                 softback_lines = 0;
 989         }
 990
 991         /* Setup default font */
 992         if (!p->fontdata && !vc->vc_font.data) {
 993                 if (!fontname[0] || !(font = find_font(fontname)))
 994                         font = get_default_font(info->var.xres,
 995                                                 info->var.yres,
 996                                                 info->pixmap.blit_x,
 997                                                 info->pixmap.blit_y);
 998                 vc->vc_font.width = font->width;
 999                 vc->vc_font.height = font->height;
1000                 vc->vc_font.data = (void *)(p->fontdata = font->data);
1001                 vc->vc_font.charcount = 256; /* FIXME  Need to support more fonts */
1002         } else {
1003                 p->fontdata = vc->vc_font.data;
1004         }
1005
1006         cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1007         rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1008         cols /= vc->vc_font.width;
1009         rows /= vc->vc_font.height;
1010         vc_resize(vc, cols, rows);
1011
1012         DPRINTK("mode:   %s\n", info->fix.id);
1013         DPRINTK("visual: %d\n", info->fix.visual);
1014         DPRINTK("res:    %dx%d-%d\n", info->var.xres,
1015                 info->var.yres,
1016                 info->var.bits_per_pixel);
1017
1018         fbcon_add_cursor_timer(info);
1019         fbcon_has_exited = 0;
1020         return display_desc;
1021 }
1022
1023 static void fbcon_init(struct vc_data *vc, int init)
1024 {
1025         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1026         struct fbcon_ops *ops;
1027         struct vc_data **default_mode = vc->vc_display_fg;
1028         struct vc_data *svc = *default_mode;
1029         struct display *t, *p = &fb_display[vc->vc_num];
1030         int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
1031         int cap, ret;
1032
1033         if (info_idx == -1 || info == NULL)
1034             return;
1035
1036         cap = info->flags;
1037
1038         if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1039             (info->fix.type == FB_TYPE_TEXT))
1040                 logo = 0;
1041
1042         if (var_to_display(p, &info->var, info))
1043                 return;
1044
1045         if (!info->fbcon_par)
1046                 con2fb_acquire_newinfo(vc, info, vc->vc_num, -1);
1047
1048         /* If we are not the first console on this
1049            fb, copy the font from that console */
1050         t = &fb_display[fg_console];
1051         if (!p->fontdata) {
1052                 if (t->fontdata) {
1053                         struct vc_data *fvc = vc_cons[fg_console].d;
1054
1055                         vc->vc_font.data = (void *)(p->fontdata =
1056                                                     fvc->vc_font.data);
1057                         vc->vc_font.width = fvc->vc_font.width;
1058                         vc->vc_font.height = fvc->vc_font.height;
1059                         p->userfont = t->userfont;
1060
1061                         if (p->userfont)
1062                                 REFCOUNT(p->fontdata)++;
1063                 } else {
1064                         const struct font_desc *font = NULL;
1065
1066                         if (!fontname[0] || !(font = find_font(fontname)))
1067                                 font = get_default_font(info->var.xres,
1068                                                         info->var.yres,
1069                                                         info->pixmap.blit_x,
1070                                                         info->pixmap.blit_y);
1071                         vc->vc_font.width = font->width;
1072                         vc->vc_font.height = font->height;
1073                         vc->vc_font.data = (void *)(p->fontdata = font->data);
1074                         vc->vc_font.charcount = 256; /* FIXME  Need to
1075                                                         support more fonts */
1076                 }
1077         }
1078
1079         if (p->userfont)
1080                 charcnt = FNTCHARCNT(p->fontdata);
1081
1082         vc->vc_panic_force_write = !!(info->flags & FBINFO_CAN_FORCE_OUTPUT);
1083         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1084         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1085         if (charcnt == 256) {
1086                 vc->vc_hi_font_mask = 0;
1087         } else {
1088                 vc->vc_hi_font_mask = 0x100;
1089                 if (vc->vc_can_do_color)
1090                         vc->vc_complement_mask <<= 1;
1091         }
1092
1093         if (!*svc->vc_uni_pagedir_loc)
1094                 con_set_default_unimap(svc);
1095         if (!*vc->vc_uni_pagedir_loc)
1096                 con_copy_unimap(vc, svc);
1097
1098         ops = info->fbcon_par;
1099         p->con_rotate = initial_rotation;
1100         set_blitting_type(vc, info);
1101
1102         cols = vc->vc_cols;
1103         rows = vc->vc_rows;
1104         new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1105         new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1106         new_cols /= vc->vc_font.width;
1107         new_rows /= vc->vc_font.height;
1108
1109         /*
1110          * We must always set the mode. The mode of the previous console
1111          * driver could be in the same resolution but we are using different
1112          * hardware so we have to initialize the hardware.
1113          *
1114          * We need to do it in fbcon_init() to prevent screen corruption.
1115          */
1116         if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
1117                 if (info->fbops->fb_set_par &&
1118                     !(ops->flags & FBCON_FLAGS_INIT)) {
1119                         ret = info->fbops->fb_set_par(info);
1120
1121                         if (ret)
1122                                 printk(KERN_ERR "fbcon_init: detected "
1123                                         "unhandled fb_set_par error, "
1124                                         "error code %d\n", ret);
1125                 }
1126
1127                 ops->flags |= FBCON_FLAGS_INIT;
1128         }
1129
1130         ops->graphics = 0;
1131
1132         if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1133             !(cap & FBINFO_HWACCEL_DISABLED))
1134                 p->scrollmode = SCROLL_MOVE;
1135         else /* default to something safe */
1136                 p->scrollmode = SCROLL_REDRAW;
1137
1138         /*
1139          *  ++guenther: console.c:vc_allocate() relies on initializing
1140          *  vc_{cols,rows}, but we must not set those if we are only
1141          *  resizing the console.
1142          */
1143         if (init) {
1144                 vc->vc_cols = new_cols;
1145                 vc->vc_rows = new_rows;
1146         } else
1147                 vc_resize(vc, new_cols, new_rows);
1148
1149         if (logo)
1150                 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1151
1152         if (vc == svc && softback_buf)
1153                 fbcon_update_softback(vc);
1154
1155         if (ops->rotate_font && ops->rotate_font(info, vc)) {
1156                 ops->rotate = FB_ROTATE_UR;
1157                 set_blitting_type(vc, info);
1158         }
1159
1160         ops->p = &fb_display[fg_console];
1161 }
1162
1163 static void fbcon_free_font(struct display *p, bool freefont)
1164 {
1165         if (freefont && p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1166                 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1167         p->fontdata = NULL;
1168         p->userfont = 0;
1169 }
1170
1171 static void fbcon_deinit(struct vc_data *vc)
1172 {
1173         struct display *p = &fb_display[vc->vc_num];
1174         struct fb_info *info;
1175         struct fbcon_ops *ops;
1176         int idx;
1177         bool free_font = true;
1178
1179         idx = con2fb_map[vc->vc_num];
1180
1181         if (idx == -1)
1182                 goto finished;
1183
1184         info = registered_fb[idx];
1185
1186         if (!info)
1187                 goto finished;
1188
1189         if (info->flags & FBINFO_MISC_FIRMWARE)
1190                 free_font = false;
1191         ops = info->fbcon_par;
1192
1193         if (!ops)
1194                 goto finished;
1195
1196         if (CON_IS_VISIBLE(vc))
1197                 fbcon_del_cursor_timer(info);
1198
1199         ops->flags &= ~FBCON_FLAGS_INIT;
1200 finished:
1201
1202         fbcon_free_font(p, free_font);
1203         if (free_font)
1204                 vc->vc_font.data = NULL;
1205
1206         if (!con_is_bound(&fb_con))
1207                 fbcon_exit();
1208
1209         return;
1210 }
1211
1212 /* ====================================================================== */
1213
1214 /*  fbcon_XXX routines - interface used by the world
1215  *
1216  *  This system is now divided into two levels because of complications
1217  *  caused by hardware scrolling. Top level functions:
1218  *
1219  *      fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1220  *
1221  *  handles y values in range [0, scr_height-1] that correspond to real
1222  *  screen positions. y_wrap shift means that first line of bitmap may be
1223  *  anywhere on this display. These functions convert lineoffsets to
1224  *  bitmap offsets and deal with the wrap-around case by splitting blits.
1225  *
1226  *      fbcon_bmove_physical_8()    -- These functions fast implementations
1227  *      fbcon_clear_physical_8()    -- of original fbcon_XXX fns.
1228  *      fbcon_putc_physical_8()     -- (font width != 8) may be added later
1229  *
1230  *  WARNING:
1231  *
1232  *  At the moment fbcon_putc() cannot blit across vertical wrap boundary
1233  *  Implies should only really hardware scroll in rows. Only reason for
1234  *  restriction is simplicity & efficiency at the moment.
1235  */
1236
1237 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1238                         int width)
1239 {
1240         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1241         struct fbcon_ops *ops = info->fbcon_par;
1242
1243         struct display *p = &fb_display[vc->vc_num];
1244         u_int y_break;
1245
1246         if (fbcon_is_inactive(vc, info))
1247                 return;
1248
1249         if (!height || !width)
1250                 return;
1251
1252         if (sy < vc->vc_top && vc->vc_top == logo_lines) {
1253                 vc->vc_top = 0;
1254                 /*
1255                  * If the font dimensions are not an integral of the display
1256                  * dimensions then the ops->clear below won't end up clearing
1257                  * the margins.  Call clear_margins here in case the logo
1258                  * bitmap stretched into the margin area.
1259                  */
1260                 fbcon_clear_margins(vc, 0);
1261         }
1262
1263         /* Split blits that cross physical y_wrap boundary */
1264
1265         y_break = p->vrows - p->yscroll;
1266         if (sy < y_break && sy + height - 1 >= y_break) {
1267                 u_int b = y_break - sy;
1268                 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1269                 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1270                                  width);
1271         } else
1272                 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1273 }
1274
1275 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1276                         int count, int ypos, int xpos)
1277 {
1278         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1279         struct display *p = &fb_display[vc->vc_num];
1280         struct fbcon_ops *ops = info->fbcon_par;
1281
1282         if (!fbcon_is_inactive(vc, info))
1283                 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1284                            get_color(vc, info, scr_readw(s), 1),
1285                            get_color(vc, info, scr_readw(s), 0));
1286 }
1287
1288 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1289 {
1290         unsigned short chr;
1291
1292         scr_writew(c, &chr);
1293         fbcon_putcs(vc, &chr, 1, ypos, xpos);
1294 }
1295
1296 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1297 {
1298         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1299         struct fbcon_ops *ops = info->fbcon_par;
1300
1301         if (!fbcon_is_inactive(vc, info))
1302                 ops->clear_margins(vc, info, bottom_only);
1303 }
1304
1305 static void fbcon_cursor(struct vc_data *vc, int mode)
1306 {
1307         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1308         struct fbcon_ops *ops = info->fbcon_par;
1309         int y;
1310         int c = scr_readw((u16 *) vc->vc_pos);
1311
1312         if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
1313                 return;
1314
1315         if (vc->vc_cursor_type & 0x10)
1316                 fbcon_del_cursor_timer(info);
1317         else
1318                 fbcon_add_cursor_timer(info);
1319
1320         ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1321         if (mode & CM_SOFTBACK) {
1322                 mode &= ~CM_SOFTBACK;
1323                 y = softback_lines;
1324         } else {
1325                 if (softback_lines)
1326                         fbcon_set_origin(vc);
1327                 y = 0;
1328         }
1329
1330         ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
1331                     get_color(vc, info, c, 0));
1332         vbl_cursor_cnt = CURSOR_DRAW_DELAY;
1333 }
1334
1335 static int scrollback_phys_max = 0;
1336 static int scrollback_max = 0;
1337 static int scrollback_current = 0;
1338
1339 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1340                            int unit)
1341 {
1342         struct display *p, *t;
1343         struct vc_data **default_mode, *vc;
1344         struct vc_data *svc;
1345         struct fbcon_ops *ops = info->fbcon_par;
1346         int rows, cols, charcnt = 256;
1347
1348         p = &fb_display[unit];
1349
1350         if (var_to_display(p, var, info))
1351                 return;
1352
1353         vc = vc_cons[unit].d;
1354
1355         if (!vc)
1356                 return;
1357
1358         default_mode = vc->vc_display_fg;
1359         svc = *default_mode;
1360         t = &fb_display[svc->vc_num];
1361
1362         if (!vc->vc_font.data) {
1363                 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1364                 vc->vc_font.width = (*default_mode)->vc_font.width;
1365                 vc->vc_font.height = (*default_mode)->vc_font.height;
1366                 p->userfont = t->userfont;
1367                 if (p->userfont)
1368                         REFCOUNT(p->fontdata)++;
1369         }
1370         if (p->userfont)
1371                 charcnt = FNTCHARCNT(p->fontdata);
1372
1373         var->activate = FB_ACTIVATE_NOW;
1374         info->var.activate = var->activate;
1375         var->yoffset = info->var.yoffset;
1376         var->xoffset = info->var.xoffset;
1377         fb_set_var(info, var);
1378         ops->var = info->var;
1379         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1380         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1381         if (charcnt == 256) {
1382                 vc->vc_hi_font_mask = 0;
1383         } else {
1384                 vc->vc_hi_font_mask = 0x100;
1385                 if (vc->vc_can_do_color)
1386                         vc->vc_complement_mask <<= 1;
1387         }
1388
1389         if (!*svc->vc_uni_pagedir_loc)
1390                 con_set_default_unimap(svc);
1391         if (!*vc->vc_uni_pagedir_loc)
1392                 con_copy_unimap(vc, svc);
1393
1394         cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1395         rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1396         cols /= vc->vc_font.width;
1397         rows /= vc->vc_font.height;
1398         vc_resize(vc, cols, rows);
1399
1400         if (CON_IS_VISIBLE(vc)) {
1401                 update_screen(vc);
1402                 if (softback_buf)
1403                         fbcon_update_softback(vc);
1404         }
1405 }
1406
1407 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1408 {
1409         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1410         struct fbcon_ops *ops = info->fbcon_par;
1411         struct display *p = &fb_display[vc->vc_num];
1412
1413         p->yscroll += count;
1414         if (p->yscroll >= p->vrows)     /* Deal with wrap */
1415                 p->yscroll -= p->vrows;
1416         ops->var.xoffset = 0;
1417         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1418         ops->var.vmode |= FB_VMODE_YWRAP;
1419         ops->update_start(info);
1420         scrollback_max += count;
1421         if (scrollback_max > scrollback_phys_max)
1422                 scrollback_max = scrollback_phys_max;
1423         scrollback_current = 0;
1424 }
1425
1426 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1427 {
1428         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1429         struct fbcon_ops *ops = info->fbcon_par;
1430         struct display *p = &fb_display[vc->vc_num];
1431
1432         p->yscroll -= count;
1433         if (p->yscroll < 0)     /* Deal with wrap */
1434                 p->yscroll += p->vrows;
1435         ops->var.xoffset = 0;
1436         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1437         ops->var.vmode |= FB_VMODE_YWRAP;
1438         ops->update_start(info);
1439         scrollback_max -= count;
1440         if (scrollback_max < 0)
1441                 scrollback_max = 0;
1442         scrollback_current = 0;
1443 }
1444
1445 static __inline__ void ypan_up(struct vc_data *vc, int count)
1446 {
1447         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1448         struct display *p = &fb_display[vc->vc_num];
1449         struct fbcon_ops *ops = info->fbcon_par;
1450
1451         p->yscroll += count;
1452         if (p->yscroll > p->vrows - vc->vc_rows) {
1453                 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1454                             0, 0, 0, vc->vc_rows, vc->vc_cols);
1455                 p->yscroll -= p->vrows - vc->vc_rows;
1456         }
1457
1458         ops->var.xoffset = 0;
1459         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1460         ops->var.vmode &= ~FB_VMODE_YWRAP;
1461         ops->update_start(info);
1462         fbcon_clear_margins(vc, 1);
1463         scrollback_max += count;
1464         if (scrollback_max > scrollback_phys_max)
1465                 scrollback_max = scrollback_phys_max;
1466         scrollback_current = 0;
1467 }
1468
1469 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1470 {
1471         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1472         struct fbcon_ops *ops = info->fbcon_par;
1473         struct display *p = &fb_display[vc->vc_num];
1474
1475         p->yscroll += count;
1476
1477         if (p->yscroll > p->vrows - vc->vc_rows) {
1478                 p->yscroll -= p->vrows - vc->vc_rows;
1479                 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1480         }
1481
1482         ops->var.xoffset = 0;
1483         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1484         ops->var.vmode &= ~FB_VMODE_YWRAP;
1485         ops->update_start(info);
1486         fbcon_clear_margins(vc, 1);
1487         scrollback_max += count;
1488         if (scrollback_max > scrollback_phys_max)
1489                 scrollback_max = scrollback_phys_max;
1490         scrollback_current = 0;
1491 }
1492
1493 static __inline__ void ypan_down(struct vc_data *vc, int count)
1494 {
1495         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1496         struct display *p = &fb_display[vc->vc_num];
1497         struct fbcon_ops *ops = info->fbcon_par;
1498
1499         p->yscroll -= count;
1500         if (p->yscroll < 0) {
1501                 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1502                             0, vc->vc_rows, vc->vc_cols);
1503                 p->yscroll += p->vrows - vc->vc_rows;
1504         }
1505
1506         ops->var.xoffset = 0;
1507         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1508         ops->var.vmode &= ~FB_VMODE_YWRAP;
1509         ops->update_start(info);
1510         fbcon_clear_margins(vc, 1);
1511         scrollback_max -= count;
1512         if (scrollback_max < 0)
1513                 scrollback_max = 0;
1514         scrollback_current = 0;
1515 }
1516
1517 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1518 {
1519         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1520         struct fbcon_ops *ops = info->fbcon_par;
1521         struct display *p = &fb_display[vc->vc_num];
1522
1523         p->yscroll -= count;
1524
1525         if (p->yscroll < 0) {
1526                 p->yscroll += p->vrows - vc->vc_rows;
1527                 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1528         }
1529
1530         ops->var.xoffset = 0;
1531         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1532         ops->var.vmode &= ~FB_VMODE_YWRAP;
1533         ops->update_start(info);
1534         fbcon_clear_margins(vc, 1);
1535         scrollback_max -= count;
1536         if (scrollback_max < 0)
1537                 scrollback_max = 0;
1538         scrollback_current = 0;
1539 }
1540
1541 static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1542                                   long delta)
1543 {
1544         int count = vc->vc_rows;
1545         unsigned short *d, *s;
1546         unsigned long n;
1547         int line = 0;
1548
1549         d = (u16 *) softback_curr;
1550         if (d == (u16 *) softback_in)
1551                 d = (u16 *) vc->vc_origin;
1552         n = softback_curr + delta * vc->vc_size_row;
1553         softback_lines -= delta;
1554         if (delta < 0) {
1555                 if (softback_curr < softback_top && n < softback_buf) {
1556                         n += softback_end - softback_buf;
1557                         if (n < softback_top) {
1558                                 softback_lines -=
1559                                     (softback_top - n) / vc->vc_size_row;
1560                                 n = softback_top;
1561                         }
1562                 } else if (softback_curr >= softback_top
1563                            && n < softback_top) {
1564                         softback_lines -=
1565                             (softback_top - n) / vc->vc_size_row;
1566                         n = softback_top;
1567                 }
1568         } else {
1569                 if (softback_curr > softback_in && n >= softback_end) {
1570                         n += softback_buf - softback_end;
1571                         if (n > softback_in) {
1572                                 n = softback_in;
1573                                 softback_lines = 0;
1574                         }
1575                 } else if (softback_curr <= softback_in && n > softback_in) {
1576                         n = softback_in;
1577                         softback_lines = 0;
1578                 }
1579         }
1580         if (n == softback_curr)
1581                 return;
1582         softback_curr = n;
1583         s = (u16 *) softback_curr;
1584         if (s == (u16 *) softback_in)
1585                 s = (u16 *) vc->vc_origin;
1586         while (count--) {
1587                 unsigned short *start;
1588                 unsigned short *le;
1589                 unsigned short c;
1590                 int x = 0;
1591                 unsigned short attr = 1;
1592
1593                 start = s;
1594                 le = advance_row(s, 1);
1595                 do {
1596                         c = scr_readw(s);
1597                         if (attr != (c & 0xff00)) {
1598                                 attr = c & 0xff00;
1599                                 if (s > start) {
1600                                         fbcon_putcs(vc, start, s - start,
1601                                                     line, x);
1602                                         x += s - start;
1603                                         start = s;
1604                                 }
1605                         }
1606                         if (c == scr_readw(d)) {
1607                                 if (s > start) {
1608                                         fbcon_putcs(vc, start, s - start,
1609                                                     line, x);
1610                                         x += s - start + 1;
1611                                         start = s + 1;
1612                                 } else {
1613                                         x++;
1614                                         start++;
1615                                 }
1616                         }
1617                         s++;
1618                         d++;
1619                 } while (s < le);
1620                 if (s > start)
1621                         fbcon_putcs(vc, start, s - start, line, x);
1622                 line++;
1623                 if (d == (u16 *) softback_end)
1624                         d = (u16 *) softback_buf;
1625                 if (d == (u16 *) softback_in)
1626                         d = (u16 *) vc->vc_origin;
1627                 if (s == (u16 *) softback_end)
1628                         s = (u16 *) softback_buf;
1629                 if (s == (u16 *) softback_in)
1630                         s = (u16 *) vc->vc_origin;
1631         }
1632 }
1633
1634 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1635                               int line, int count, int dy)
1636 {
1637         unsigned short *s = (unsigned short *)
1638                 (vc->vc_origin + vc->vc_size_row * line);
1639
1640         while (count--) {
1641                 unsigned short *start = s;
1642                 unsigned short *le = advance_row(s, 1);
1643                 unsigned short c;
1644                 int x = 0;
1645                 unsigned short attr = 1;
1646
1647                 do {
1648                         c = scr_readw(s);
1649                         if (attr != (c & 0xff00)) {
1650                                 attr = c & 0xff00;
1651                                 if (s > start) {
1652                                         fbcon_putcs(vc, start, s - start,
1653                                                     dy, x);
1654                                         x += s - start;
1655                                         start = s;
1656                                 }
1657                         }
1658                         console_conditional_schedule();
1659                         s++;
1660                 } while (s < le);
1661                 if (s > start)
1662                         fbcon_putcs(vc, start, s - start, dy, x);
1663                 console_conditional_schedule();
1664                 dy++;
1665         }
1666 }
1667
1668 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
1669                         struct display *p, int line, int count, int ycount)
1670 {
1671         int offset = ycount * vc->vc_cols;
1672         unsigned short *d = (unsigned short *)
1673             (vc->vc_origin + vc->vc_size_row * line);
1674         unsigned short *s = d + offset;
1675         struct fbcon_ops *ops = info->fbcon_par;
1676
1677         while (count--) {
1678                 unsigned short *start = s;
1679                 unsigned short *le = advance_row(s, 1);
1680                 unsigned short c;
1681                 int x = 0;
1682
1683                 do {
1684                         c = scr_readw(s);
1685
1686                         if (c == scr_readw(d)) {
1687                                 if (s > start) {
1688                                         ops->bmove(vc, info, line + ycount, x,
1689                                                    line, x, 1, s-start);
1690                                         x += s - start + 1;
1691                                         start = s + 1;
1692                                 } else {
1693                                         x++;
1694                                         start++;
1695                                 }
1696                         }
1697
1698                         scr_writew(c, d);
1699                         console_conditional_schedule();
1700                         s++;
1701                         d++;
1702                 } while (s < le);
1703                 if (s > start)
1704                         ops->bmove(vc, info, line + ycount, x, line, x, 1,
1705                                    s-start);
1706                 console_conditional_schedule();
1707                 if (ycount > 0)
1708                         line++;
1709                 else {
1710                         line--;
1711                         /* NOTE: We subtract two lines from these pointers */
1712                         s -= vc->vc_size_row;
1713                         d -= vc->vc_size_row;
1714                 }
1715         }
1716 }
1717
1718 static void fbcon_redraw(struct vc_data *vc, struct display *p,
1719                          int line, int count, int offset)
1720 {
1721         unsigned short *d = (unsigned short *)
1722             (vc->vc_origin + vc->vc_size_row * line);
1723         unsigned short *s = d + offset;
1724
1725         while (count--) {
1726                 unsigned short *start = s;
1727                 unsigned short *le = advance_row(s, 1);
1728                 unsigned short c;
1729                 int x = 0;
1730                 unsigned short attr = 1;
1731
1732                 do {
1733                         c = scr_readw(s);
1734                         if (attr != (c & 0xff00)) {
1735                                 attr = c & 0xff00;
1736                                 if (s > start) {
1737                                         fbcon_putcs(vc, start, s - start,
1738                                                     line, x);
1739                                         x += s - start;
1740                                         start = s;
1741                                 }
1742                         }
1743                         if (c == scr_readw(d)) {
1744                                 if (s > start) {
1745                                         fbcon_putcs(vc, start, s - start,
1746                                                      line, x);
1747                                         x += s - start + 1;
1748                                         start = s + 1;
1749                                 } else {
1750                                         x++;
1751                                         start++;
1752                                 }
1753                         }
1754                         scr_writew(c, d);
1755                         console_conditional_schedule();
1756                         s++;
1757                         d++;
1758                 } while (s < le);
1759                 if (s > start)
1760                         fbcon_putcs(vc, start, s - start, line, x);
1761                 console_conditional_schedule();
1762                 if (offset > 0)
1763                         line++;
1764                 else {
1765                         line--;
1766                         /* NOTE: We subtract two lines from these pointers */
1767                         s -= vc->vc_size_row;
1768                         d -= vc->vc_size_row;
1769                 }
1770         }
1771 }
1772
1773 static inline void fbcon_softback_note(struct vc_data *vc, int t,
1774                                        int count)
1775 {
1776         unsigned short *p;
1777
1778         if (vc->vc_num != fg_console)
1779                 return;
1780         p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1781
1782         while (count) {
1783                 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1784                 count--;
1785                 p = advance_row(p, 1);
1786                 softback_in += vc->vc_size_row;
1787                 if (softback_in == softback_end)
1788                         softback_in = softback_buf;
1789                 if (softback_in == softback_top) {
1790                         softback_top += vc->vc_size_row;
1791                         if (softback_top == softback_end)
1792                                 softback_top = softback_buf;
1793                 }
1794         }
1795         softback_curr = softback_in;
1796 }
1797
1798 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
1799                         int count)
1800 {
1801         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1802         struct display *p = &fb_display[vc->vc_num];
1803         int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1804
1805         if (fbcon_is_inactive(vc, info))
1806                 return -EINVAL;
1807
1808         fbcon_cursor(vc, CM_ERASE);
1809
1810         /*
1811          * ++Geert: Only use ywrap/ypan if the console is in text mode
1812          * ++Andrew: Only use ypan on hardware text mode when scrolling the
1813          *           whole screen (prevents flicker).
1814          */
1815
1816         switch (dir) {
1817         case SM_UP:
1818                 if (count > vc->vc_rows)        /* Maximum realistic size */
1819                         count = vc->vc_rows;
1820                 if (softback_top)
1821                         fbcon_softback_note(vc, t, count);
1822                 if (logo_shown >= 0)
1823                         goto redraw_up;
1824                 switch (p->scrollmode) {
1825                 case SCROLL_MOVE:
1826                         fbcon_redraw_blit(vc, info, p, t, b - t - count,
1827                                      count);
1828                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1829                         scr_memsetw((unsigned short *) (vc->vc_origin +
1830                                                         vc->vc_size_row *
1831                                                         (b - count)),
1832                                     vc->vc_video_erase_char,
1833                                     vc->vc_size_row * count);
1834                         return 1;
1835                         break;
1836
1837                 case SCROLL_WRAP_MOVE:
1838                         if (b - t - count > 3 * vc->vc_rows >> 2) {
1839                                 if (t > 0)
1840                                         fbcon_bmove(vc, 0, 0, count, 0, t,
1841                                                     vc->vc_cols);
1842                                 ywrap_up(vc, count);
1843                                 if (vc->vc_rows - b > 0)
1844                                         fbcon_bmove(vc, b - count, 0, b, 0,
1845                                                     vc->vc_rows - b,
1846                                                     vc->vc_cols);
1847                         } else if (info->flags & FBINFO_READS_FAST)
1848                                 fbcon_bmove(vc, t + count, 0, t, 0,
1849                                             b - t - count, vc->vc_cols);
1850                         else
1851                                 goto redraw_up;
1852                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1853                         break;
1854
1855                 case SCROLL_PAN_REDRAW:
1856                         if ((p->yscroll + count <=
1857                              2 * (p->vrows - vc->vc_rows))
1858                             && ((!scroll_partial && (b - t == vc->vc_rows))
1859                                 || (scroll_partial
1860                                     && (b - t - count >
1861                                         3 * vc->vc_rows >> 2)))) {
1862                                 if (t > 0)
1863                                         fbcon_redraw_move(vc, p, 0, t, count);
1864                                 ypan_up_redraw(vc, t, count);
1865                                 if (vc->vc_rows - b > 0)
1866                                         fbcon_redraw_move(vc, p, b,
1867                                                           vc->vc_rows - b, b);
1868                         } else
1869                                 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1870                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1871                         break;
1872
1873                 case SCROLL_PAN_MOVE:
1874                         if ((p->yscroll + count <=
1875                              2 * (p->vrows - vc->vc_rows))
1876                             && ((!scroll_partial && (b - t == vc->vc_rows))
1877                                 || (scroll_partial
1878                                     && (b - t - count >
1879                                         3 * vc->vc_rows >> 2)))) {
1880                                 if (t > 0)
1881                                         fbcon_bmove(vc, 0, 0, count, 0, t,
1882                                                     vc->vc_cols);
1883                                 ypan_up(vc, count);
1884                                 if (vc->vc_rows - b > 0)
1885                                         fbcon_bmove(vc, b - count, 0, b, 0,
1886                                                     vc->vc_rows - b,
1887                                                     vc->vc_cols);
1888                         } else if (info->flags & FBINFO_READS_FAST)
1889                                 fbcon_bmove(vc, t + count, 0, t, 0,
1890                                             b - t - count, vc->vc_cols);
1891                         else
1892                                 goto redraw_up;
1893                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1894                         break;
1895
1896                 case SCROLL_REDRAW:
1897                       redraw_up:
1898                         fbcon_redraw(vc, p, t, b - t - count,
1899                                      count * vc->vc_cols);
1900                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1901                         scr_memsetw((unsigned short *) (vc->vc_origin +
1902                                                         vc->vc_size_row *
1903                                                         (b - count)),
1904                                     vc->vc_video_erase_char,
1905                                     vc->vc_size_row * count);
1906                         return 1;
1907                 }
1908                 break;
1909
1910         case SM_DOWN:
1911                 if (count > vc->vc_rows)        /* Maximum realistic size */
1912                         count = vc->vc_rows;
1913                 if (logo_shown >= 0)
1914                         goto redraw_down;
1915                 switch (p->scrollmode) {
1916                 case SCROLL_MOVE:
1917                         fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,
1918                                      -count);
1919                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1920                         scr_memsetw((unsigned short *) (vc->vc_origin +
1921                                                         vc->vc_size_row *
1922                                                         t),
1923                                     vc->vc_video_erase_char,
1924                                     vc->vc_size_row * count);
1925                         return 1;
1926                         break;
1927
1928                 case SCROLL_WRAP_MOVE:
1929                         if (b - t - count > 3 * vc->vc_rows >> 2) {
1930                                 if (vc->vc_rows - b > 0)
1931                                         fbcon_bmove(vc, b, 0, b - count, 0,
1932                                                     vc->vc_rows - b,
1933                                                     vc->vc_cols);
1934                                 ywrap_down(vc, count);
1935                                 if (t > 0)
1936                                         fbcon_bmove(vc, count, 0, 0, 0, t,
1937                                                     vc->vc_cols);
1938                         } else if (info->flags & FBINFO_READS_FAST)
1939                                 fbcon_bmove(vc, t, 0, t + count, 0,
1940                                             b - t - count, vc->vc_cols);
1941                         else
1942                                 goto redraw_down;
1943                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1944                         break;
1945
1946                 case SCROLL_PAN_MOVE:
1947                         if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1948                             && ((!scroll_partial && (b - t == vc->vc_rows))
1949                                 || (scroll_partial
1950                                     && (b - t - count >
1951                                         3 * vc->vc_rows >> 2)))) {
1952                                 if (vc->vc_rows - b > 0)
1953                                         fbcon_bmove(vc, b, 0, b - count, 0,
1954                                                     vc->vc_rows - b,
1955                                                     vc->vc_cols);
1956                                 ypan_down(vc, count);
1957                                 if (t > 0)
1958                                         fbcon_bmove(vc, count, 0, 0, 0, t,
1959                                                     vc->vc_cols);
1960                         } else if (info->flags & FBINFO_READS_FAST)
1961                                 fbcon_bmove(vc, t, 0, t + count, 0,
1962                                             b - t - count, vc->vc_cols);
1963                         else
1964                                 goto redraw_down;
1965                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1966                         break;
1967
1968                 case SCROLL_PAN_REDRAW:
1969                         if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1970                             && ((!scroll_partial && (b - t == vc->vc_rows))
1971                                 || (scroll_partial
1972                                     && (b - t - count >
1973                                         3 * vc->vc_rows >> 2)))) {
1974                                 if (vc->vc_rows - b > 0)
1975                                         fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
1976                                                           b - count);
1977                                 ypan_down_redraw(vc, t, count);
1978                                 if (t > 0)
1979                                         fbcon_redraw_move(vc, p, count, t, 0);
1980                         } else
1981                                 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
1982                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1983                         break;
1984
1985                 case SCROLL_REDRAW:
1986                       redraw_down:
1987                         fbcon_redraw(vc, p, b - 1, b - t - count,
1988                                      -count * vc->vc_cols);
1989                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1990                         scr_memsetw((unsigned short *) (vc->vc_origin +
1991                                                         vc->vc_size_row *
1992                                                         t),
1993                                     vc->vc_video_erase_char,
1994                                     vc->vc_size_row * count);
1995                         return 1;
1996                 }
1997         }
1998         return 0;
1999 }
2000
2001
2002 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
2003                         int height, int width)
2004 {
2005         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2006         struct display *p = &fb_display[vc->vc_num];
2007
2008         if (fbcon_is_inactive(vc, info))
2009                 return;
2010
2011         if (!width || !height)
2012                 return;
2013
2014         /*  Split blits that cross physical y_wrap case.
2015          *  Pathological case involves 4 blits, better to use recursive
2016          *  code rather than unrolled case
2017          *
2018          *  Recursive invocations don't need to erase the cursor over and
2019          *  over again, so we use fbcon_bmove_rec()
2020          */
2021         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
2022                         p->vrows - p->yscroll);
2023 }
2024
2025 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
2026                             int dy, int dx, int height, int width, u_int y_break)
2027 {
2028         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2029         struct fbcon_ops *ops = info->fbcon_par;
2030         u_int b;
2031
2032         if (sy < y_break && sy + height > y_break) {
2033                 b = y_break - sy;
2034                 if (dy < sy) {  /* Avoid trashing self */
2035                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2036                                         y_break);
2037                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2038                                         height - b, width, y_break);
2039                 } else {
2040                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2041                                         height - b, width, y_break);
2042                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2043                                         y_break);
2044                 }
2045                 return;
2046         }
2047
2048         if (dy < y_break && dy + height > y_break) {
2049                 b = y_break - dy;
2050                 if (dy < sy) {  /* Avoid trashing self */
2051                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2052                                         y_break);
2053                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2054                                         height - b, width, y_break);
2055                 } else {
2056                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2057                                         height - b, width, y_break);
2058                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2059                                         y_break);
2060                 }
2061                 return;
2062         }
2063         ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
2064                    height, width);
2065 }
2066
2067 static void updatescrollmode(struct display *p,
2068                                         struct fb_info *info,
2069                                         struct vc_data *vc)
2070 {
2071         struct fbcon_ops *ops = info->fbcon_par;
2072         int fh = vc->vc_font.height;
2073         int cap = info->flags;
2074         u16 t = 0;
2075         int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
2076                                   info->fix.xpanstep);
2077         int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
2078         int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2079         int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
2080                                    info->var.xres_virtual);
2081         int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
2082                 divides(ypan, vc->vc_font.height) && vyres > yres;
2083         int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
2084                 divides(ywrap, vc->vc_font.height) &&
2085                 divides(vc->vc_font.height, vyres) &&
2086                 divides(vc->vc_font.height, yres);
2087         int reading_fast = cap & FBINFO_READS_FAST;
2088         int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
2089                 !(cap & FBINFO_HWACCEL_DISABLED);
2090         int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
2091                 !(cap & FBINFO_HWACCEL_DISABLED);
2092
2093         p->vrows = vyres/fh;
2094         if (yres > (fh * (vc->vc_rows + 1)))
2095                 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2096         if ((yres % fh) && (vyres % fh < yres % fh))
2097                 p->vrows--;
2098
2099         if (good_wrap || good_pan) {
2100                 if (reading_fast || fast_copyarea)
2101                         p->scrollmode = good_wrap ?
2102                                 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
2103                 else
2104                         p->scrollmode = good_wrap ? SCROLL_REDRAW :
2105                                 SCROLL_PAN_REDRAW;
2106         } else {
2107                 if (reading_fast || (fast_copyarea && !fast_imageblit))
2108                         p->scrollmode = SCROLL_MOVE;
2109                 else
2110                         p->scrollmode = SCROLL_REDRAW;
2111         }
2112 }
2113
2114 static int fbcon_resize(struct vc_data *vc, unsigned int width,
2115                         unsigned int height, unsigned int user)
2116 {
2117         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2118         struct fbcon_ops *ops = info->fbcon_par;
2119         struct display *p = &fb_display[vc->vc_num];
2120         struct fb_var_screeninfo var = info->var;
2121         int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2122
2123         virt_w = FBCON_SWAP(ops->rotate, width, height);
2124         virt_h = FBCON_SWAP(ops->rotate, height, width);
2125         virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2126                                  vc->vc_font.height);
2127         virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2128                                  vc->vc_font.width);
2129         var.xres = virt_w * virt_fw;
2130         var.yres = virt_h * virt_fh;
2131         x_diff = info->var.xres - var.xres;
2132         y_diff = info->var.yres - var.yres;
2133         if (x_diff < 0 || x_diff > virt_fw ||
2134             y_diff < 0 || y_diff > virt_fh) {
2135                 const struct fb_videomode *mode;
2136
2137                 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2138                 mode = fb_find_best_mode(&var, &info->modelist);
2139                 if (mode == NULL)
2140                         return -EINVAL;
2141                 display_to_var(&var, p);
2142                 fb_videomode_to_var(&var, mode);
2143
2144                 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2145                         return -EINVAL;
2146
2147                 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2148                 if (CON_IS_VISIBLE(vc)) {
2149                         var.activate = FB_ACTIVATE_NOW |
2150                                 FB_ACTIVATE_FORCE;
2151                         fb_set_var(info, &var);
2152                 }
2153                 var_to_display(p, &info->var, info);
2154                 ops->var = info->var;
2155         }
2156         updatescrollmode(p, info, vc);
2157         return 0;
2158 }
2159
2160 static int fbcon_switch(struct vc_data *vc)
2161 {
2162         struct fb_info *info, *old_info = NULL;
2163         struct fbcon_ops *ops;
2164         struct display *p = &fb_display[vc->vc_num];
2165         struct fb_var_screeninfo var;
2166         int i, ret, prev_console, charcnt = 256;
2167
2168         info = registered_fb[con2fb_map[vc->vc_num]];
2169         ops = info->fbcon_par;
2170
2171         if (softback_top) {
2172                 if (softback_lines)
2173                         fbcon_set_origin(vc);
2174                 softback_top = softback_curr = softback_in = softback_buf;
2175                 softback_lines = 0;
2176                 fbcon_update_softback(vc);
2177         }
2178
2179         if (logo_shown >= 0) {
2180                 struct vc_data *conp2 = vc_cons[logo_shown].d;
2181
2182                 if (conp2->vc_top == logo_lines
2183                     && conp2->vc_bottom == conp2->vc_rows)
2184                         conp2->vc_top = 0;
2185                 logo_shown = FBCON_LOGO_CANSHOW;
2186         }
2187
2188         prev_console = ops->currcon;
2189         if (prev_console != -1)
2190                 old_info = registered_fb[con2fb_map[prev_console]];
2191         /*
2192          * FIXME: If we have multiple fbdev's loaded, we need to
2193          * update all info->currcon.  Perhaps, we can place this
2194          * in a centralized structure, but this might break some
2195          * drivers.
2196          *
2197          * info->currcon = vc->vc_num;
2198          */
2199         for (i = 0; i < FB_MAX; i++) {
2200                 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
2201                         struct fbcon_ops *o = registered_fb[i]->fbcon_par;
2202
2203                         o->currcon = vc->vc_num;
2204                 }
2205         }
2206         memset(&var, 0, sizeof(struct fb_var_screeninfo));
2207         display_to_var(&var, p);
2208         var.activate = FB_ACTIVATE_NOW;
2209
2210         /*
2211          * make sure we don't unnecessarily trip the memcmp()
2212          * in fb_set_var()
2213          */
2214         info->var.activate = var.activate;
2215         var.vmode |= info->var.vmode & ~FB_VMODE_MASK;
2216         fb_set_var(info, &var);
2217         ops->var = info->var;
2218
2219         if (old_info != NULL && (old_info != info ||
2220                                  info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2221                 if (info->fbops->fb_set_par) {
2222                         ret = info->fbops->fb_set_par(info);
2223
2224                         if (ret)
2225                                 printk(KERN_ERR "fbcon_switch: detected "
2226                                         "unhandled fb_set_par error, "
2227                                         "error code %d\n", ret);
2228                 }
2229
2230                 if (old_info != info)
2231                         fbcon_del_cursor_timer(old_info);
2232         }
2233
2234         if (fbcon_is_inactive(vc, info) ||
2235             ops->blank_state != FB_BLANK_UNBLANK)
2236                 fbcon_del_cursor_timer(info);
2237         else
2238                 fbcon_add_cursor_timer(info);
2239
2240         set_blitting_type(vc, info);
2241         ops->cursor_reset = 1;
2242
2243         if (ops->rotate_font && ops->rotate_font(info, vc)) {
2244                 ops->rotate = FB_ROTATE_UR;
2245                 set_blitting_type(vc, info);
2246         }
2247
2248         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2249         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2250
2251         if (p->userfont)
2252                 charcnt = FNTCHARCNT(vc->vc_font.data);
2253
2254         if (charcnt > 256)
2255                 vc->vc_complement_mask <<= 1;
2256
2257         updatescrollmode(p, info, vc);
2258
2259         switch (p->scrollmode) {
2260         case SCROLL_WRAP_MOVE:
2261                 scrollback_phys_max = p->vrows - vc->vc_rows;
2262                 break;
2263         case SCROLL_PAN_MOVE:
2264         case SCROLL_PAN_REDRAW:
2265                 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2266                 if (scrollback_phys_max < 0)
2267                         scrollback_phys_max = 0;
2268                 break;
2269         default:
2270                 scrollback_phys_max = 0;
2271                 break;
2272         }
2273
2274         scrollback_max = 0;
2275         scrollback_current = 0;
2276
2277         if (!fbcon_is_inactive(vc, info)) {
2278             ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2279             ops->update_start(info);
2280         }
2281
2282         fbcon_set_palette(vc, color_table);
2283         fbcon_clear_margins(vc, 0);
2284
2285         if (logo_shown == FBCON_LOGO_DRAW) {
2286
2287                 logo_shown = fg_console;
2288                 /* This is protected above by initmem_freed */
2289                 fb_show_logo(info, ops->rotate);
2290                 update_region(vc,
2291                               vc->vc_origin + vc->vc_size_row * vc->vc_top,
2292                               vc->vc_size_row * (vc->vc_bottom -
2293                                                  vc->vc_top) / 2);
2294                 return 0;
2295         }
2296         return 1;
2297 }
2298
2299 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2300                                 int blank)
2301 {
2302         struct fb_event event;
2303
2304         if (blank) {
2305                 unsigned short charmask = vc->vc_hi_font_mask ?
2306                         0x1ff : 0xff;
2307                 unsigned short oldc;
2308
2309                 oldc = vc->vc_video_erase_char;
2310                 vc->vc_video_erase_char &= charmask;
2311                 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2312                 vc->vc_video_erase_char = oldc;
2313         }
2314
2315
2316         if (!lock_fb_info(info))
2317                 return;
2318         event.info = info;
2319         event.data = &blank;
2320         fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
2321         unlock_fb_info(info);
2322 }
2323
2324 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2325 {
2326         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2327         struct fbcon_ops *ops = info->fbcon_par;
2328
2329         if (mode_switch) {
2330                 struct fb_var_screeninfo var = info->var;
2331
2332                 ops->graphics = 1;
2333
2334                 if (!blank) {
2335                         var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2336                         fb_set_var(info, &var);
2337                         ops->graphics = 0;
2338                         ops->var = info->var;
2339                 }
2340         }
2341
2342         if (!fbcon_is_inactive(vc, info)) {
2343                 if (ops->blank_state != blank) {
2344                         ops->blank_state = blank;
2345                         fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2346                         ops->cursor_flash = (!blank);
2347
2348                         if (!(info->flags & FBINFO_MISC_USEREVENT))
2349                                 if (fb_blank(info, blank))
2350                                         fbcon_generic_blank(vc, info, blank);
2351                 }
2352
2353                 if (!blank)
2354                         update_screen(vc);
2355         }
2356
2357         if (mode_switch || fbcon_is_inactive(vc, info) ||
2358             ops->blank_state != FB_BLANK_UNBLANK)
2359                 fbcon_del_cursor_timer(info);
2360         else
2361                 fbcon_add_cursor_timer(info);
2362
2363         return 0;
2364 }
2365
2366 static int fbcon_debug_enter(struct vc_data *vc)
2367 {
2368         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2369         struct fbcon_ops *ops = info->fbcon_par;
2370
2371         ops->save_graphics = ops->graphics;
2372         ops->graphics = 0;
2373         if (info->fbops->fb_debug_enter)
2374                 info->fbops->fb_debug_enter(info);
2375         fbcon_set_palette(vc, color_table);
2376         return 0;
2377 }
2378
2379 static int fbcon_debug_leave(struct vc_data *vc)
2380 {
2381         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2382         struct fbcon_ops *ops = info->fbcon_par;
2383
2384         ops->graphics = ops->save_graphics;
2385         if (info->fbops->fb_debug_leave)
2386                 info->fbops->fb_debug_leave(info);
2387         return 0;
2388 }
2389
2390 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2391 {
2392         u8 *fontdata = vc->vc_font.data;
2393         u8 *data = font->data;
2394         int i, j;
2395
2396         font->width = vc->vc_font.width;
2397         font->height = vc->vc_font.height;
2398         font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2399         if (!font->data)
2400                 return 0;
2401
2402         if (font->width <= 8) {
2403                 j = vc->vc_font.height;
2404                 for (i = 0; i < font->charcount; i++) {
2405                         memcpy(data, fontdata, j);
2406                         memset(data + j, 0, 32 - j);
2407                         data += 32;
2408                         fontdata += j;
2409                 }
2410         } else if (font->width <= 16) {
2411                 j = vc->vc_font.height * 2;
2412                 for (i = 0; i < font->charcount; i++) {
2413                         memcpy(data, fontdata, j);
2414                         memset(data + j, 0, 64 - j);
2415                         data += 64;
2416                         fontdata += j;
2417                 }
2418         } else if (font->width <= 24) {
2419                 for (i = 0; i < font->charcount; i++) {
2420                         for (j = 0; j < vc->vc_font.height; j++) {
2421                                 *data++ = fontdata[0];
2422                                 *data++ = fontdata[1];
2423                                 *data++ = fontdata[2];
2424                                 fontdata += sizeof(u32);
2425                         }
2426                         memset(data, 0, 3 * (32 - j));
2427                         data += 3 * (32 - j);
2428                 }
2429         } else {
2430                 j = vc->vc_font.height * 4;
2431                 for (i = 0; i < font->charcount; i++) {
2432                         memcpy(data, fontdata, j);
2433                         memset(data + j, 0, 128 - j);
2434                         data += 128;
2435                         fontdata += j;
2436                 }
2437         }
2438         return 0;
2439 }
2440
2441 static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2442                              const u8 * data, int userfont)
2443 {
2444         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2445         struct fbcon_ops *ops = info->fbcon_par;
2446         struct display *p = &fb_display[vc->vc_num];
2447         int resize;
2448         int cnt;
2449         char *old_data = NULL;
2450
2451         if (CON_IS_VISIBLE(vc) && softback_lines)
2452                 fbcon_set_origin(vc);
2453
2454         resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2455         if (p->userfont)
2456                 old_data = vc->vc_font.data;
2457         if (userfont)
2458                 cnt = FNTCHARCNT(data);
2459         else
2460                 cnt = 256;
2461         vc->vc_font.data = (void *)(p->fontdata = data);
2462         if ((p->userfont = userfont))
2463                 REFCOUNT(data)++;
2464         vc->vc_font.width = w;
2465         vc->vc_font.height = h;
2466         if (vc->vc_hi_font_mask && cnt == 256) {
2467                 vc->vc_hi_font_mask = 0;
2468                 if (vc->vc_can_do_color) {
2469                         vc->vc_complement_mask >>= 1;
2470                         vc->vc_s_complement_mask >>= 1;
2471                 }
2472
2473                 /* ++Edmund: reorder the attribute bits */
2474                 if (vc->vc_can_do_color) {
2475                         unsigned short *cp =
2476                             (unsigned short *) vc->vc_origin;
2477                         int count = vc->vc_screenbuf_size / 2;
2478                         unsigned short c;
2479                         for (; count > 0; count--, cp++) {
2480                                 c = scr_readw(cp);
2481                                 scr_writew(((c & 0xfe00) >> 1) |
2482                                            (c & 0xff), cp);
2483                         }
2484                         c = vc->vc_video_erase_char;
2485                         vc->vc_video_erase_char =
2486                             ((c & 0xfe00) >> 1) | (c & 0xff);
2487                         vc->vc_attr >>= 1;
2488                 }
2489         } else if (!vc->vc_hi_font_mask && cnt == 512) {
2490                 vc->vc_hi_font_mask = 0x100;
2491                 if (vc->vc_can_do_color) {
2492                         vc->vc_complement_mask <<= 1;
2493                         vc->vc_s_complement_mask <<= 1;
2494                 }
2495
2496                 /* ++Edmund: reorder the attribute bits */
2497                 {
2498                         unsigned short *cp =
2499                             (unsigned short *) vc->vc_origin;
2500                         int count = vc->vc_screenbuf_size / 2;
2501                         unsigned short c;
2502                         for (; count > 0; count--, cp++) {
2503                                 unsigned short newc;
2504                                 c = scr_readw(cp);
2505                                 if (vc->vc_can_do_color)
2506                                         newc =
2507                                             ((c & 0xff00) << 1) | (c &
2508                                                                    0xff);
2509                                 else
2510                                         newc = c & ~0x100;
2511                                 scr_writew(newc, cp);
2512                         }
2513                         c = vc->vc_video_erase_char;
2514                         if (vc->vc_can_do_color) {
2515                                 vc->vc_video_erase_char =
2516                                     ((c & 0xff00) << 1) | (c & 0xff);
2517                                 vc->vc_attr <<= 1;
2518                         } else
2519                                 vc->vc_video_erase_char = c & ~0x100;
2520                 }
2521
2522         }
2523
2524         if (resize) {
2525                 int cols, rows;
2526
2527                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2528                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2529                 cols /= w;
2530                 rows /= h;
2531                 vc_resize(vc, cols, rows);
2532                 if (CON_IS_VISIBLE(vc) && softback_buf)
2533                         fbcon_update_softback(vc);
2534         } else if (CON_IS_VISIBLE(vc)
2535                    && vc->vc_mode == KD_TEXT) {
2536                 fbcon_clear_margins(vc, 0);
2537                 update_screen(vc);
2538         }
2539
2540         if (old_data && (--REFCOUNT(old_data) == 0))
2541                 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2542         return 0;
2543 }
2544
2545 static int fbcon_copy_font(struct vc_data *vc, int con)
2546 {
2547         struct display *od = &fb_display[con];
2548         struct console_font *f = &vc->vc_font;
2549
2550         if (od->fontdata == f->data)
2551                 return 0;       /* already the same font... */
2552         return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2553 }
2554
2555 /*
2556  *  User asked to set font; we are guaranteed that
2557  *      a) width and height are in range 1..32
2558  *      b) charcount does not exceed 512
2559  *  but lets not assume that, since someone might someday want to use larger
2560  *  fonts. And charcount of 512 is small for unicode support.
2561  *
2562  *  However, user space gives the font in 32 rows , regardless of
2563  *  actual font height. So a new API is needed if support for larger fonts
2564  *  is ever implemented.
2565  */
2566
2567 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2568 {
2569         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2570         unsigned charcount = font->charcount;
2571         int w = font->width;
2572         int h = font->height;
2573         int size;
2574         int i, csum;
2575         u8 *new_data, *data = font->data;
2576         int pitch = (font->width+7) >> 3;
2577
2578         /* Is there a reason why fbconsole couldn't handle any charcount >256?
2579          * If not this check should be changed to charcount < 256 */
2580         if (charcount != 256 && charcount != 512)
2581                 return -EINVAL;
2582
2583         /* Make sure drawing engine can handle the font */
2584         if (!(info->pixmap.blit_x & (1 << (font->width - 1))) ||
2585             !(info->pixmap.blit_y & (1 << (font->height - 1))))
2586                 return -EINVAL;
2587
2588         /* Make sure driver can handle the font length */
2589         if (fbcon_invalid_charcount(info, charcount))
2590                 return -EINVAL;
2591
2592         size = h * pitch * charcount;
2593
2594         new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2595
2596         if (!new_data)
2597                 return -ENOMEM;
2598
2599         new_data += FONT_EXTRA_WORDS * sizeof(int);
2600         FNTSIZE(new_data) = size;
2601         FNTCHARCNT(new_data) = charcount;
2602         REFCOUNT(new_data) = 0; /* usage counter */
2603         for (i=0; i< charcount; i++) {
2604                 memcpy(new_data + i*h*pitch, data +  i*32*pitch, h*pitch);
2605         }
2606
2607         /* Since linux has a nice crc32 function use it for counting font
2608          * checksums. */
2609         csum = crc32(0, new_data, size);
2610
2611         FNTSUM(new_data) = csum;
2612         /* Check if the same font is on some other console already */
2613         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2614                 struct vc_data *tmp = vc_cons[i].d;
2615
2616                 if (fb_display[i].userfont &&
2617                     fb_display[i].fontdata &&
2618                     FNTSUM(fb_display[i].fontdata) == csum &&
2619                     FNTSIZE(fb_display[i].fontdata) == size &&
2620                     tmp->vc_font.width == w &&
2621                     !memcmp(fb_display[i].fontdata, new_data, size)) {
2622                         kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2623                         new_data = (u8 *)fb_display[i].fontdata;
2624                         break;
2625                 }
2626         }
2627         return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2628 }
2629
2630 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2631 {
2632         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2633         const struct font_desc *f;
2634
2635         if (!name)
2636                 f = get_default_font(info->var.xres, info->var.yres,
2637                                      info->pixmap.blit_x, info->pixmap.blit_y);
2638         else if (!(f = find_font(name)))
2639                 return -ENOENT;
2640
2641         font->width = f->width;
2642         font->height = f->height;
2643         return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2644 }
2645
2646 static u16 palette_red[16];
2647 static u16 palette_green[16];
2648 static u16 palette_blue[16];
2649
2650 static struct fb_cmap palette_cmap = {
2651         0, 16, palette_red, palette_green, palette_blue, NULL
2652 };
2653
2654 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
2655 {
2656         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2657         int i, j, k, depth;
2658         u8 val;
2659
2660         if (fbcon_is_inactive(vc, info))
2661                 return -EINVAL;
2662
2663         if (!CON_IS_VISIBLE(vc))
2664                 return 0;
2665
2666         depth = fb_get_color_depth(&info->var, &info->fix);
2667         if (depth > 3) {
2668                 for (i = j = 0; i < 16; i++) {
2669                         k = table[i];
2670                         val = vc->vc_palette[j++];
2671                         palette_red[k] = (val << 8) | val;
2672                         val = vc->vc_palette[j++];
2673                         palette_green[k] = (val << 8) | val;
2674                         val = vc->vc_palette[j++];
2675                         palette_blue[k] = (val << 8) | val;
2676                 }
2677                 palette_cmap.len = 16;
2678                 palette_cmap.start = 0;
2679         /*
2680          * If framebuffer is capable of less than 16 colors,
2681          * use default palette of fbcon.
2682          */
2683         } else
2684                 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2685
2686         return fb_set_cmap(&palette_cmap, info);
2687 }
2688
2689 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2690 {
2691         unsigned long p;
2692         int line;
2693
2694         if (vc->vc_num != fg_console || !softback_lines)
2695                 return (u16 *) (vc->vc_origin + offset);
2696         line = offset / vc->vc_size_row;
2697         if (line >= softback_lines)
2698                 return (u16 *) (vc->vc_origin + offset -
2699                                 softback_lines * vc->vc_size_row);
2700         p = softback_curr + offset;
2701         if (p >= softback_end)
2702                 p += softback_buf - softback_end;
2703         return (u16 *) p;
2704 }
2705
2706 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2707                                  int *px, int *py)
2708 {
2709         unsigned long ret;
2710         int x, y;
2711
2712         if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2713                 unsigned long offset = (pos - vc->vc_origin) / 2;
2714
2715                 x = offset % vc->vc_cols;
2716                 y = offset / vc->vc_cols;
2717                 if (vc->vc_num == fg_console)
2718                         y += softback_lines;
2719                 ret = pos + (vc->vc_cols - x) * 2;
2720         } else if (vc->vc_num == fg_console && softback_lines) {
2721                 unsigned long offset = pos - softback_curr;
2722
2723                 if (pos < softback_curr)
2724                         offset += softback_end - softback_buf;
2725                 offset /= 2;
2726                 x = offset % vc->vc_cols;
2727                 y = offset / vc->vc_cols;
2728                 ret = pos + (vc->vc_cols - x) * 2;
2729                 if (ret == softback_end)
2730                         ret = softback_buf;
2731                 if (ret == softback_in)
2732                         ret = vc->vc_origin;
2733         } else {
2734                 /* Should not happen */
2735                 x = y = 0;
2736                 ret = vc->vc_origin;
2737         }
2738         if (px)
2739                 *px = x;
2740         if (py)
2741                 *py = y;
2742         return ret;
2743 }
2744
2745 /* As we might be inside of softback, we may work with non-contiguous buffer,
2746    that's why we have to use a separate routine. */
2747 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2748 {
2749         while (cnt--) {
2750                 u16 a = scr_readw(p);
2751                 if (!vc->vc_can_do_color)
2752                         a ^= 0x0800;
2753                 else if (vc->vc_hi_font_mask == 0x100)
2754                         a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2755                             (((a) & 0x0e00) << 4);
2756                 else
2757                         a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2758                             (((a) & 0x0700) << 4);
2759                 scr_writew(a, p++);
2760                 if (p == (u16 *) softback_end)
2761                         p = (u16 *) softback_buf;
2762                 if (p == (u16 *) softback_in)
2763                         p = (u16 *) vc->vc_origin;
2764         }
2765 }
2766
2767 static int fbcon_scrolldelta(struct vc_data *vc, int lines)
2768 {
2769         struct fb_info *info = registered_fb[con2fb_map[fg_console]];
2770         struct fbcon_ops *ops = info->fbcon_par;
2771         struct display *disp = &fb_display[fg_console];
2772         int offset, limit, scrollback_old;
2773
2774         if (softback_top) {
2775                 if (vc->vc_num != fg_console)
2776                         return 0;
2777                 if (vc->vc_mode != KD_TEXT || !lines)
2778                         return 0;
2779                 if (logo_shown >= 0) {
2780                         struct vc_data *conp2 = vc_cons[logo_shown].d;
2781
2782                         if (conp2->vc_top == logo_lines
2783                             && conp2->vc_bottom == conp2->vc_rows)
2784                                 conp2->vc_top = 0;
2785                         if (logo_shown == vc->vc_num) {
2786                                 unsigned long p, q;
2787                                 int i;
2788
2789                                 p = softback_in;
2790                                 q = vc->vc_origin +
2791                                     logo_lines * vc->vc_size_row;
2792                                 for (i = 0; i < logo_lines; i++) {
2793                                         if (p == softback_top)
2794                                                 break;
2795                                         if (p == softback_buf)
2796                                                 p = softback_end;
2797                                         p -= vc->vc_size_row;
2798                                         q -= vc->vc_size_row;
2799                                         scr_memcpyw((u16 *) q, (u16 *) p,
2800                                                     vc->vc_size_row);
2801                                 }
2802                                 softback_in = softback_curr = p;
2803                                 update_region(vc, vc->vc_origin,
2804                                               logo_lines * vc->vc_cols);
2805                         }
2806                         logo_shown = FBCON_LOGO_CANSHOW;
2807                 }
2808                 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2809                 fbcon_redraw_softback(vc, disp, lines);
2810                 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2811                 return 0;
2812         }
2813
2814         if (!scrollback_phys_max)
2815                 return -ENOSYS;
2816
2817         scrollback_old = scrollback_current;
2818         scrollback_current -= lines;
2819         if (scrollback_current < 0)
2820                 scrollback_current = 0;
2821         else if (scrollback_current > scrollback_max)
2822                 scrollback_current = scrollback_max;
2823         if (scrollback_current == scrollback_old)
2824                 return 0;
2825
2826         if (fbcon_is_inactive(vc, info))
2827                 return 0;
2828
2829         fbcon_cursor(vc, CM_ERASE);
2830
2831         offset = disp->yscroll - scrollback_current;
2832         limit = disp->vrows;
2833         switch (disp->scrollmode) {
2834         case SCROLL_WRAP_MOVE:
2835                 info->var.vmode |= FB_VMODE_YWRAP;
2836                 break;
2837         case SCROLL_PAN_MOVE:
2838         case SCROLL_PAN_REDRAW:
2839                 limit -= vc->vc_rows;
2840                 info->var.vmode &= ~FB_VMODE_YWRAP;
2841                 break;
2842         }
2843         if (offset < 0)
2844                 offset += limit;
2845         else if (offset >= limit)
2846                 offset -= limit;
2847
2848         ops->var.xoffset = 0;
2849         ops->var.yoffset = offset * vc->vc_font.height;
2850         ops->update_start(info);
2851
2852         if (!scrollback_current)
2853                 fbcon_cursor(vc, CM_DRAW);
2854         return 0;
2855 }
2856
2857 static int fbcon_set_origin(struct vc_data *vc)
2858 {
2859         if (softback_lines)
2860                 fbcon_scrolldelta(vc, softback_lines);
2861         return 0;
2862 }
2863
2864 static void fbcon_suspended(struct fb_info *info)
2865 {
2866         struct vc_data *vc = NULL;
2867         struct fbcon_ops *ops = info->fbcon_par;
2868
2869         if (!ops || ops->currcon < 0)
2870                 return;
2871         vc = vc_cons[ops->currcon].d;
2872
2873         /* Clear cursor, restore saved data */
2874         fbcon_cursor(vc, CM_ERASE);
2875 }
2876
2877 static void fbcon_resumed(struct fb_info *info)
2878 {
2879         struct vc_data *vc;
2880         struct fbcon_ops *ops = info->fbcon_par;
2881
2882         if (!ops || ops->currcon < 0)
2883                 return;
2884         vc = vc_cons[ops->currcon].d;
2885
2886         update_screen(vc);
2887 }
2888
2889 static void fbcon_modechanged(struct fb_info *info)
2890 {
2891         struct fbcon_ops *ops = info->fbcon_par;
2892         struct vc_data *vc;
2893         struct display *p;
2894         int rows, cols;
2895
2896         if (!ops || ops->currcon < 0)
2897                 return;
2898         vc = vc_cons[ops->currcon].d;
2899         if (vc->vc_mode != KD_TEXT ||
2900             registered_fb[con2fb_map[ops->currcon]] != info)
2901                 return;
2902
2903         p = &fb_display[vc->vc_num];
2904         set_blitting_type(vc, info);
2905
2906         if (CON_IS_VISIBLE(vc)) {
2907                 var_to_display(p, &info->var, info);
2908                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2909                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2910                 cols /= vc->vc_font.width;
2911                 rows /= vc->vc_font.height;
2912                 vc_resize(vc, cols, rows);
2913                 updatescrollmode(p, info, vc);
2914                 scrollback_max = 0;
2915                 scrollback_current = 0;
2916
2917                 if (!fbcon_is_inactive(vc, info)) {
2918                     ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2919                     ops->update_start(info);
2920                 }
2921
2922                 fbcon_set_palette(vc, color_table);
2923                 update_screen(vc);
2924                 if (softback_buf)
2925                         fbcon_update_softback(vc);
2926         }
2927 }
2928
2929 static void fbcon_set_all_vcs(struct fb_info *info)
2930 {
2931         struct fbcon_ops *ops = info->fbcon_par;
2932         struct vc_data *vc;
2933         struct display *p;
2934         int i, rows, cols, fg = -1;
2935
2936         if (!ops || ops->currcon < 0)
2937                 return;
2938
2939         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2940                 vc = vc_cons[i].d;
2941                 if (!vc || vc->vc_mode != KD_TEXT ||
2942                     registered_fb[con2fb_map[i]] != info)
2943                         continue;
2944
2945                 if (CON_IS_VISIBLE(vc)) {
2946                         fg = i;
2947                         continue;
2948                 }
2949
2950                 p = &fb_display[vc->vc_num];
2951                 set_blitting_type(vc, info);
2952                 var_to_display(p, &info->var, info);
2953                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2954                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2955                 cols /= vc->vc_font.width;
2956                 rows /= vc->vc_font.height;
2957                 vc_resize(vc, cols, rows);
2958         }
2959
2960         if (fg != -1)
2961                 fbcon_modechanged(info);
2962 }
2963
2964 static int fbcon_mode_deleted(struct fb_info *info,
2965                               struct fb_videomode *mode)
2966 {
2967         struct fb_info *fb_info;
2968         struct display *p;
2969         int i, j, found = 0;
2970
2971         /* before deletion, ensure that mode is not in use */
2972         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2973                 j = con2fb_map[i];
2974                 if (j == -1)
2975                         continue;
2976                 fb_info = registered_fb[j];
2977                 if (fb_info != info)
2978                         continue;
2979                 p = &fb_display[i];
2980                 if (!p || !p->mode)
2981                         continue;
2982                 if (fb_mode_is_equal(p->mode, mode)) {
2983                         found = 1;
2984                         break;
2985                 }
2986         }
2987         return found;
2988 }
2989
2990 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
2991 static int fbcon_unbind(void)
2992 {
2993         int ret;
2994
2995         ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
2996                                 fbcon_is_default);
2997
2998         if (!ret)
2999                 fbcon_has_console_bind = 0;
3000
3001         return ret;
3002 }
3003 #else
3004 static inline int fbcon_unbind(void)
3005 {
3006         return -EINVAL;
3007 }
3008 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3009
3010 /* called with console_lock held */
3011 static int fbcon_fb_unbind(int idx)
3012 {
3013         int i, new_idx = -1, ret = 0;
3014
3015         if (!fbcon_has_console_bind)
3016                 return 0;
3017
3018         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3019                 if (con2fb_map[i] != idx &&
3020                     con2fb_map[i] != -1) {
3021                         new_idx = i;
3022                         break;
3023                 }
3024         }
3025
3026         if (new_idx != -1) {
3027                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3028                         if (con2fb_map[i] == idx)
3029                                 set_con2fb_map(i, new_idx, 0);
3030                 }
3031         } else {
3032                 struct fb_info *info = registered_fb[idx];
3033
3034                 /* This is sort of like set_con2fb_map, except it maps
3035                  * the consoles to no device and then releases the
3036                  * oldinfo to free memory and cancel the cursor blink
3037                  * timer. I can imagine this just becoming part of
3038                  * set_con2fb_map where new_idx is -1
3039                  */
3040                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3041                         if (con2fb_map[i] == idx) {
3042                                 con2fb_map[i] = -1;
3043                                 if (!search_fb_in_map(idx)) {
3044                                         ret = con2fb_release_oldinfo(vc_cons[i].d,
3045                                                                      info, NULL, i,
3046                                                                      idx, 0);
3047                                         if (ret) {
3048                                                 con2fb_map[i] = idx;
3049                                                 return ret;
3050                                         }
3051                                 }
3052                         }
3053                 }
3054                 ret = fbcon_unbind();
3055         }
3056
3057         return ret;
3058 }
3059
3060 /* called with console_lock held */
3061 static int fbcon_fb_unregistered(struct fb_info *info)
3062 {
3063         int i, idx;
3064
3065         idx = info->node;
3066         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3067                 if (con2fb_map[i] == idx)
3068                         con2fb_map[i] = -1;
3069         }
3070
3071         if (idx == info_idx) {
3072                 info_idx = -1;
3073
3074                 for (i = 0; i < FB_MAX; i++) {
3075                         if (registered_fb[i] != NULL) {
3076                                 info_idx = i;
3077                                 break;
3078                         }
3079                 }
3080         }
3081
3082         if (info_idx != -1) {
3083                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3084                         if (con2fb_map[i] == -1)
3085                                 con2fb_map[i] = info_idx;
3086                 }
3087         }
3088
3089         if (primary_device == idx)
3090                 primary_device = -1;
3091
3092         if (!num_registered_fb)
3093                 do_unregister_con_driver(&fb_con);
3094
3095         return 0;
3096 }
3097
3098 /* called with console_lock held */
3099 static void fbcon_remap_all(int idx)
3100 {
3101         int i;
3102         for (i = first_fb_vc; i <= last_fb_vc; i++)
3103                 set_con2fb_map(i, idx, 0);
3104
3105         if (con_is_bound(&fb_con)) {
3106                 printk(KERN_INFO "fbcon: Remapping primary device, "
3107                        "fb%i, to tty %i-%i\n", idx,
3108                        first_fb_vc + 1, last_fb_vc + 1);
3109                 info_idx = idx;
3110         }
3111 }
3112
3113 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
3114 static void fbcon_select_primary(struct fb_info *info)
3115 {
3116         if (!map_override && primary_device == -1 &&
3117             fb_is_primary_device(info)) {
3118                 int i;
3119
3120                 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n",
3121                        info->fix.id, info->node);
3122                 primary_device = info->node;
3123
3124                 for (i = first_fb_vc; i <= last_fb_vc; i++)
3125                         con2fb_map_boot[i] = primary_device;
3126
3127                 if (con_is_bound(&fb_con)) {
3128                         printk(KERN_INFO "fbcon: Remapping primary device, "
3129                                "fb%i, to tty %i-%i\n", info->node,
3130                                first_fb_vc + 1, last_fb_vc + 1);
3131                         info_idx = primary_device;
3132                 }
3133         }
3134
3135 }
3136 #else
3137 static inline void fbcon_select_primary(struct fb_info *info)
3138 {
3139         return;
3140 }
3141 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
3142
3143 /* called with console_lock held */
3144 static int fbcon_fb_registered(struct fb_info *info)
3145 {
3146         int ret = 0, i, idx;
3147
3148         idx = info->node;
3149         fbcon_select_primary(info);
3150
3151         if (info_idx == -1) {
3152                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3153                         if (con2fb_map_boot[i] == idx) {
3154                                 info_idx = idx;
3155                                 break;
3156                         }
3157                 }
3158
3159                 if (info_idx != -1)
3160                         ret = do_fbcon_takeover(1);
3161         } else {
3162                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3163                         if (con2fb_map_boot[i] == idx)
3164                                 set_con2fb_map(i, idx, 0);
3165                 }
3166         }
3167
3168         return ret;
3169 }
3170
3171 static void fbcon_fb_blanked(struct fb_info *info, int blank)
3172 {
3173         struct fbcon_ops *ops = info->fbcon_par;
3174         struct vc_data *vc;
3175
3176         if (!ops || ops->currcon < 0)
3177                 return;
3178
3179         vc = vc_cons[ops->currcon].d;
3180         if (vc->vc_mode != KD_TEXT ||
3181                         registered_fb[con2fb_map[ops->currcon]] != info)
3182                 return;
3183
3184         if (CON_IS_VISIBLE(vc)) {
3185                 if (blank)
3186                         do_blank_screen(0);
3187                 else
3188                         do_unblank_screen(0);
3189         }
3190         ops->blank_state = blank;
3191 }
3192
3193 static void fbcon_new_modelist(struct fb_info *info)
3194 {
3195         int i;
3196         struct vc_data *vc;
3197         struct fb_var_screeninfo var;
3198         const struct fb_videomode *mode;
3199
3200         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3201                 if (registered_fb[con2fb_map[i]] != info)
3202                         continue;
3203                 if (!fb_display[i].mode)
3204                         continue;
3205                 vc = vc_cons[i].d;
3206                 display_to_var(&var, &fb_display[i]);
3207                 mode = fb_find_nearest_mode(fb_display[i].mode,
3208                                             &info->modelist);
3209                 fb_videomode_to_var(&var, mode);
3210                 fbcon_set_disp(info, &var, vc->vc_num);
3211         }
3212 }
3213
3214 static void fbcon_get_requirement(struct fb_info *info,
3215                                   struct fb_blit_caps *caps)
3216 {
3217         struct vc_data *vc;
3218         struct display *p;
3219
3220         if (caps->flags) {
3221                 int i, charcnt;
3222
3223                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3224                         vc = vc_cons[i].d;
3225                         if (vc && vc->vc_mode == KD_TEXT &&
3226                             info->node == con2fb_map[i]) {
3227                                 p = &fb_display[i];
3228                                 caps->x |= 1 << (vc->vc_font.width - 1);
3229                                 caps->y |= 1 << (vc->vc_font.height - 1);
3230                                 charcnt = (p->userfont) ?
3231                                         FNTCHARCNT(p->fontdata) : 256;
3232                                 if (caps->len < charcnt)
3233                                         caps->len = charcnt;
3234                         }
3235                 }
3236         } else {
3237                 vc = vc_cons[fg_console].d;
3238
3239                 if (vc && vc->vc_mode == KD_TEXT &&
3240                     info->node == con2fb_map[fg_console]) {
3241                         p = &fb_display[fg_console];
3242                         caps->x = 1 << (vc->vc_font.width - 1);
3243                         caps->y = 1 << (vc->vc_font.height - 1);
3244                         caps->len = (p->userfont) ?
3245                                 FNTCHARCNT(p->fontdata) : 256;
3246                 }
3247         }
3248 }
3249
3250 static int fbcon_event_notify(struct notifier_block *self,
3251                               unsigned long action, void *data)
3252 {
3253         struct fb_event *event = data;
3254         struct fb_info *info = event->info;
3255         struct fb_videomode *mode;
3256         struct fb_con2fbmap *con2fb;
3257         struct fb_blit_caps *caps;
3258         int idx, ret = 0;
3259
3260         /*
3261          * ignore all events except driver registration and deregistration
3262          * if fbcon is not active
3263          */
3264         if (fbcon_has_exited && !(action == FB_EVENT_FB_REGISTERED ||
3265                                   action == FB_EVENT_FB_UNREGISTERED))
3266                 goto done;
3267
3268         switch(action) {
3269         case FB_EVENT_SUSPEND:
3270                 fbcon_suspended(info);
3271                 break;
3272         case FB_EVENT_RESUME:
3273                 fbcon_resumed(info);
3274                 break;
3275         case FB_EVENT_MODE_CHANGE:
3276                 fbcon_modechanged(info);
3277                 break;
3278         case FB_EVENT_MODE_CHANGE_ALL:
3279                 fbcon_set_all_vcs(info);
3280                 break;
3281         case FB_EVENT_MODE_DELETE:
3282                 mode = event->data;
3283                 ret = fbcon_mode_deleted(info, mode);
3284                 break;
3285         case FB_EVENT_FB_UNBIND:
3286                 idx = info->node;
3287                 ret = fbcon_fb_unbind(idx);
3288                 break;
3289         case FB_EVENT_FB_REGISTERED:
3290                 ret = fbcon_fb_registered(info);
3291                 break;
3292         case FB_EVENT_FB_UNREGISTERED:
3293                 ret = fbcon_fb_unregistered(info);
3294                 break;
3295         case FB_EVENT_SET_CONSOLE_MAP:
3296                 /* called with console lock held */
3297                 con2fb = event->data;
3298                 ret = set_con2fb_map(con2fb->console - 1,
3299                                      con2fb->framebuffer, 1);
3300                 break;
3301         case FB_EVENT_GET_CONSOLE_MAP:
3302                 con2fb = event->data;
3303                 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
3304                 break;
3305         case FB_EVENT_BLANK:
3306                 fbcon_fb_blanked(info, *(int *)event->data);
3307                 break;
3308         case FB_EVENT_NEW_MODELIST:
3309                 fbcon_new_modelist(info);
3310                 break;
3311         case FB_EVENT_GET_REQ:
3312                 caps = event->data;
3313                 fbcon_get_requirement(info, caps);
3314                 break;
3315         case FB_EVENT_REMAP_ALL_CONSOLE:
3316                 idx = info->node;
3317                 fbcon_remap_all(idx);
3318                 break;
3319         }
3320 done:
3321         return ret;
3322 }
3323
3324 /*
3325  *  The console `switch' structure for the frame buffer based console
3326  */
3327
3328 static const struct consw fb_con = {
3329         .owner                  = THIS_MODULE,
3330         .con_startup            = fbcon_startup,
3331         .con_init               = fbcon_init,
3332         .con_deinit             = fbcon_deinit,
3333         .con_clear              = fbcon_clear,
3334         .con_putc               = fbcon_putc,
3335         .con_putcs              = fbcon_putcs,
3336         .con_cursor             = fbcon_cursor,
3337         .con_scroll             = fbcon_scroll,
3338         .con_bmove              = fbcon_bmove,
3339         .con_switch             = fbcon_switch,
3340         .con_blank              = fbcon_blank,
3341         .con_font_set           = fbcon_set_font,
3342         .con_font_get           = fbcon_get_font,
3343         .con_font_default       = fbcon_set_def_font,
3344         .con_font_copy          = fbcon_copy_font,
3345         .con_set_palette        = fbcon_set_palette,
3346         .con_scrolldelta        = fbcon_scrolldelta,
3347         .con_set_origin         = fbcon_set_origin,
3348         .con_invert_region      = fbcon_invert_region,
3349         .con_screen_pos         = fbcon_screen_pos,
3350         .con_getxy              = fbcon_getxy,
3351         .con_resize             = fbcon_resize,
3352         .con_debug_enter        = fbcon_debug_enter,
3353         .con_debug_leave        = fbcon_debug_leave,
3354 };
3355
3356 static struct notifier_block fbcon_event_notifier = {
3357         .notifier_call  = fbcon_event_notify,
3358 };
3359
3360 static ssize_t store_rotate(struct device *device,
3361                             struct device_attribute *attr, const char *buf,
3362                             size_t count)
3363 {
3364         struct fb_info *info;
3365         int rotate, idx;
3366         char **last = NULL;
3367
3368         if (fbcon_has_exited)
3369                 return count;
3370
3371         console_lock();
3372         idx = con2fb_map[fg_console];
3373
3374         if (idx == -1 || registered_fb[idx] == NULL)
3375                 goto err;
3376
3377         info = registered_fb[idx];
3378         rotate = simple_strtoul(buf, last, 0);
3379         fbcon_rotate(info, rotate);
3380 err:
3381         console_unlock();
3382         return count;
3383 }
3384
3385 static ssize_t store_rotate_all(struct device *device,
3386                                 struct device_attribute *attr,const char *buf,
3387                                 size_t count)
3388 {
3389         struct fb_info *info;
3390         int rotate, idx;
3391         char **last = NULL;
3392
3393         if (fbcon_has_exited)
3394                 return count;
3395
3396         console_lock();
3397         idx = con2fb_map[fg_console];
3398
3399         if (idx == -1 || registered_fb[idx] == NULL)
3400                 goto err;
3401
3402         info = registered_fb[idx];
3403         rotate = simple_strtoul(buf, last, 0);
3404         fbcon_rotate_all(info, rotate);
3405 err:
3406         console_unlock();
3407         return count;
3408 }
3409
3410 static ssize_t show_rotate(struct device *device,
3411                            struct device_attribute *attr,char *buf)
3412 {
3413         struct fb_info *info;
3414         int rotate = 0, idx;
3415
3416         if (fbcon_has_exited)
3417                 return 0;
3418
3419         console_lock();
3420         idx = con2fb_map[fg_console];
3421
3422         if (idx == -1 || registered_fb[idx] == NULL)
3423                 goto err;
3424
3425         info = registered_fb[idx];
3426         rotate = fbcon_get_rotate(info);
3427 err:
3428         console_unlock();
3429         return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3430 }
3431
3432 static ssize_t show_cursor_blink(struct device *device,
3433                                  struct device_attribute *attr, char *buf)
3434 {
3435         struct fb_info *info;
3436         struct fbcon_ops *ops;
3437         int idx, blink = -1;
3438
3439         if (fbcon_has_exited)
3440                 return 0;
3441
3442         console_lock();
3443         idx = con2fb_map[fg_console];
3444
3445         if (idx == -1 || registered_fb[idx] == NULL)
3446                 goto err;
3447
3448         info = registered_fb[idx];
3449         ops = info->fbcon_par;
3450
3451         if (!ops)
3452                 goto err;
3453
3454         blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0;
3455 err:
3456         console_unlock();
3457         return snprintf(buf, PAGE_SIZE, "%d\n", blink);
3458 }
3459
3460 static ssize_t store_cursor_blink(struct device *device,
3461                                   struct device_attribute *attr,
3462                                   const char *buf, size_t count)
3463 {
3464         struct fb_info *info;
3465         int blink, idx;
3466         char **last = NULL;
3467
3468         if (fbcon_has_exited)
3469                 return count;
3470
3471         console_lock();
3472         idx = con2fb_map[fg_console];
3473
3474         if (idx == -1 || registered_fb[idx] == NULL)
3475                 goto err;
3476
3477         info = registered_fb[idx];
3478
3479         if (!info->fbcon_par)
3480                 goto err;
3481
3482         blink = simple_strtoul(buf, last, 0);
3483
3484         if (blink) {
3485                 fbcon_cursor_noblink = 0;
3486                 fbcon_add_cursor_timer(info);
3487         } else {
3488                 fbcon_cursor_noblink = 1;
3489                 fbcon_del_cursor_timer(info);
3490         }
3491
3492 err:
3493         console_unlock();
3494         return count;
3495 }
3496
3497 static struct device_attribute device_attrs[] = {
3498         __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3499         __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3500         __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink,
3501                store_cursor_blink),
3502 };
3503
3504 static int fbcon_init_device(void)
3505 {
3506         int i, error = 0;
3507
3508         fbcon_has_sysfs = 1;
3509
3510         for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3511                 error = device_create_file(fbcon_device, &device_attrs[i]);
3512
3513                 if (error)
3514                         break;
3515         }
3516
3517         if (error) {
3518                 while (--i >= 0)
3519                         device_remove_file(fbcon_device, &device_attrs[i]);
3520
3521                 fbcon_has_sysfs = 0;
3522         }
3523
3524         return 0;
3525 }
3526
3527 static void fbcon_start(void)
3528 {
3529         if (num_registered_fb) {
3530                 int i;
3531
3532                 console_lock();
3533
3534                 for (i = 0; i < FB_MAX; i++) {
3535                         if (registered_fb[i] != NULL) {
3536                                 info_idx = i;
3537                                 break;
3538                         }
3539                 }
3540
3541                 do_fbcon_takeover(0);
3542                 console_unlock();
3543
3544         }
3545 }
3546
3547 static void fbcon_exit(void)
3548 {
3549         struct fb_info *info;
3550         int i, j, mapped;
3551
3552         if (fbcon_has_exited)
3553                 return;
3554
3555         kfree((void *)softback_buf);
3556         softback_buf = 0UL;
3557
3558         for (i = 0; i < FB_MAX; i++) {
3559                 int pending = 0;
3560
3561                 mapped = 0;
3562                 info = registered_fb[i];
3563
3564                 if (info == NULL)
3565                         continue;
3566
3567                 if (info->queue.func)
3568                         pending = cancel_work_sync(&info->queue);
3569                 DPRINTK("fbcon: %s pending work\n", (pending ? "canceled" :
3570                         "no"));
3571
3572                 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3573                         if (con2fb_map[j] == i) {
3574                                 mapped = 1;
3575                                 break;
3576                         }
3577                 }
3578
3579                 if (mapped) {
3580                         if (info->fbops->fb_release)
3581                                 info->fbops->fb_release(info, 0);
3582                         module_put(info->fbops->owner);
3583
3584                         if (info->fbcon_par) {
3585                                 struct fbcon_ops *ops = info->fbcon_par;
3586
3587                                 fbcon_del_cursor_timer(info);
3588                                 kfree(ops->cursor_src);
3589                                 kfree(ops->cursor_state.mask);
3590                                 kfree(info->fbcon_par);
3591                                 info->fbcon_par = NULL;
3592                         }
3593
3594                         if (info->queue.func == fb_flashcursor)
3595                                 info->queue.func = NULL;
3596                 }
3597         }
3598
3599         fbcon_has_exited = 1;
3600 }
3601
3602 static int __init fb_console_init(void)
3603 {
3604         int i;
3605
3606         console_lock();
3607         fb_register_client(&fbcon_event_notifier);
3608         fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL,
3609                                      "fbcon");
3610
3611         if (IS_ERR(fbcon_device)) {
3612                 printk(KERN_WARNING "Unable to create device "
3613                        "for fbcon; errno = %ld\n",
3614                        PTR_ERR(fbcon_device));
3615                 fbcon_device = NULL;
3616         } else
3617                 fbcon_init_device();
3618
3619         for (i = 0; i < MAX_NR_CONSOLES; i++)
3620                 con2fb_map[i] = -1;
3621
3622         console_unlock();
3623         fbcon_start();
3624         return 0;
3625 }
3626
3627 module_init(fb_console_init);
3628
3629 #ifdef MODULE
3630
3631 static void __exit fbcon_deinit_device(void)
3632 {
3633         int i;
3634
3635         if (fbcon_has_sysfs) {
3636                 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3637                         device_remove_file(fbcon_device, &device_attrs[i]);
3638
3639                 fbcon_has_sysfs = 0;
3640         }
3641 }
3642
3643 static void __exit fb_console_exit(void)
3644 {
3645         console_lock();
3646         fb_unregister_client(&fbcon_event_notifier);
3647         fbcon_deinit_device();
3648         device_destroy(fb_class, MKDEV(0, 0));
3649         fbcon_exit();
3650         do_unregister_con_driver(&fb_con);
3651         console_unlock();
3652 }
3653
3654 module_exit(fb_console_exit);
3655
3656 #endif
3657
3658 MODULE_LICENSE("GPL");