drivers/video/console/fbcon.c

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