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 #ifdef CONFIG_ATARI
  82 #include <asm/atariints.h>
  83 #endif
  84 #ifdef CONFIG_MAC
  85 #include <asm/macints.h>
  86 #endif
  87 #if defined(__mc68000__)
  88 #include <asm/machdep.h>
  89 #include <asm/setup.h>
  90 #endif
  91
  92 #include "fbcon.h"
  93
  94 #ifdef FBCONDEBUG
  95 #  define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __func__ , ## args)
  96 #else
  97 #  define DPRINTK(fmt, args...)
  98 #endif
  99
 100 enum {
 101         FBCON_LOGO_CANSHOW      = -1,   /* the logo can be shown */
 102         FBCON_LOGO_DRAW         = -2,   /* draw the logo to a console */
 103         FBCON_LOGO_DONTSHOW     = -3    /* do not show the logo */
 104 };
 105
 106 static struct display fb_display[MAX_NR_CONSOLES];
 107
 108 static signed char con2fb_map[MAX_NR_CONSOLES];
 109 static signed char con2fb_map_boot[MAX_NR_CONSOLES];
 110
 111 static int logo_lines;
 112 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
 113    enums.  */
 114 static int logo_shown = FBCON_LOGO_CANSHOW;
 115 /* Software scrollback */
 116 static int fbcon_softback_size = 32768;
 117 static unsigned long softback_buf, softback_curr;
 118 static unsigned long softback_in;
 119 static unsigned long softback_top, softback_end;
 120 static int softback_lines;
 121 /* console mappings */
 122 static int first_fb_vc;
 123 static int last_fb_vc = MAX_NR_CONSOLES - 1;
 124 static int fbcon_is_default = 1;
 125 static int fbcon_has_exited;
 126 static int primary_device = -1;
 127
 128 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
 129 static int map_override;
 130
 131 static inline void fbcon_map_override(void)
 132 {
 133         map_override = 1;
 134 }
 135 #else
 136 static inline void fbcon_map_override(void)
 137 {
 138 }
 139 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY */
 140
 141 /* font data */
 142 static char fontname[40];
 143
 144 /* current fb_info */
 145 static int info_idx = -1;
 146
 147 /* console rotation */
 148 static int initial_rotation;
 149 static int fbcon_has_sysfs;
 150
 151 static const struct consw fb_con;
 152
 153 #define CM_SOFTBACK     (8)
 154
 155 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
 156
 157 static int fbcon_set_origin(struct vc_data *);
 158
 159 #define CURSOR_DRAW_DELAY               (1)
 160
 161 /* # VBL ints between cursor state changes */
 162 #define ATARI_CURSOR_BLINK_RATE         (42)
 163 #define MAC_CURSOR_BLINK_RATE           (32)
 164 #define DEFAULT_CURSOR_BLINK_RATE       (20)
 165
 166 static int vbl_cursor_cnt;
 167 static int fbcon_cursor_noblink;
 168
 169 #define divides(a, b)   ((!(a) || (b)%(a)) ? 0 : 1)
 170
 171 /*
 172  *  Interface used by the world
 173  */
 174
 175 static const char *fbcon_startup(void);
 176 static void fbcon_init(struct vc_data *vc, int init);
 177 static void fbcon_deinit(struct vc_data *vc);
 178 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
 179                         int width);
 180 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
 181 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
 182                         int count, int ypos, int xpos);
 183 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
 184 static void fbcon_cursor(struct vc_data *vc, int mode);
 185 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
 186                         int count);
 187 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
 188                         int height, int width);
 189 static int fbcon_switch(struct vc_data *vc);
 190 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
 191 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table);
 192 static int fbcon_scrolldelta(struct vc_data *vc, int lines);
 193
 194 /*
 195  *  Internal routines
 196  */
 197 static __inline__ void ywrap_up(struct vc_data *vc, int count);
 198 static __inline__ void ywrap_down(struct vc_data *vc, int count);
 199 static __inline__ void ypan_up(struct vc_data *vc, int count);
 200 static __inline__ void ypan_down(struct vc_data *vc, int count);
 201 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
 202                             int dy, int dx, int height, int width, u_int y_break);
 203 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
 204                            int unit);
 205 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
 206                               int line, int count, int dy);
 207 static void fbcon_modechanged(struct fb_info *info);
 208 static void fbcon_set_all_vcs(struct fb_info *info);
 209 static void fbcon_start(void);
 210 static void fbcon_exit(void);
 211 static struct device *fbcon_device;
 212
 213 #ifdef CONFIG_MAC
 214 /*
 215  * On the Macintoy, there may or may not be a working VBL int. We need to probe
 216  */
 217 static int vbl_detected;
 218
 219 static irqreturn_t fb_vbl_detect(int irq, void *dummy)
 220 {
 221         vbl_detected++;
 222         return IRQ_HANDLED;
 223 }
 224 #endif
 225
 226 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
 227 static inline void fbcon_set_rotation(struct fb_info *info)
 228 {
 229         struct fbcon_ops *ops = info->fbcon_par;
 230
 231         if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
 232             ops->p->con_rotate < 4)
 233                 ops->rotate = ops->p->con_rotate;
 234         else
 235                 ops->rotate = 0;
 236 }
 237
 238 static void fbcon_rotate(struct fb_info *info, u32 rotate)
 239 {
 240         struct fbcon_ops *ops= info->fbcon_par;
 241         struct fb_info *fb_info;
 242
 243         if (!ops || ops->currcon == -1)
 244                 return;
 245
 246         fb_info = registered_fb[con2fb_map[ops->currcon]];
 247
 248         if (info == fb_info) {
 249                 struct display *p = &fb_display[ops->currcon];
 250
 251                 if (rotate < 4)
 252                         p->con_rotate = rotate;
 253                 else
 254                         p->con_rotate = 0;
 255
 256                 fbcon_modechanged(info);
 257         }
 258 }
 259
 260 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
 261 {
 262         struct fbcon_ops *ops = info->fbcon_par;
 263         struct vc_data *vc;
 264         struct display *p;
 265         int i;
 266
 267         if (!ops || ops->currcon < 0 || rotate > 3)
 268                 return;
 269
 270         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 271                 vc = vc_cons[i].d;
 272                 if (!vc || vc->vc_mode != KD_TEXT ||
 273                     registered_fb[con2fb_map[i]] != info)
 274                         continue;
 275
 276                 p = &fb_display[vc->vc_num];
 277                 p->con_rotate = rotate;
 278         }
 279
 280         fbcon_set_all_vcs(info);
 281 }
 282 #else
 283 static inline void fbcon_set_rotation(struct fb_info *info)
 284 {
 285         struct fbcon_ops *ops = info->fbcon_par;
 286
 287         ops->rotate = FB_ROTATE_UR;
 288 }
 289
 290 static void fbcon_rotate(struct fb_info *info, u32 rotate)
 291 {
 292         return;
 293 }
 294
 295 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
 296 {
 297         return;
 298 }
 299 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
 300
 301 static int fbcon_get_rotate(struct fb_info *info)
 302 {
 303         struct fbcon_ops *ops = info->fbcon_par;
 304
 305         return (ops) ? ops->rotate : 0;
 306 }
 307
 308 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
 309 {
 310         struct fbcon_ops *ops = info->fbcon_par;
 311
 312         return (info->state != FBINFO_STATE_RUNNING ||
 313                 vc->vc_mode != KD_TEXT || ops->graphics);
 314 }
 315
 316 static inline int get_color(struct vc_data *vc, struct fb_info *info,
 317               u16 c, int is_fg)
 318 {
 319         int depth = fb_get_color_depth(&info->var, &info->fix);
 320         int color = 0;
 321
 322         if (console_blanked) {
 323                 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
 324
 325                 c = vc->vc_video_erase_char & charmask;
 326         }
 327
 328         if (depth != 1)
 329                 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
 330                         : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
 331
 332         switch (depth) {
 333         case 1:
 334         {
 335                 int col = mono_col(info);
 336                 /* 0 or 1 */
 337                 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
 338                 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
 339
 340                 if (console_blanked)
 341                         fg = bg;
 342
 343                 color = (is_fg) ? fg : bg;
 344                 break;
 345         }
 346         case 2:
 347                 /*
 348                  * Scale down 16-colors to 4 colors. Default 4-color palette
 349                  * is grayscale. However, simply dividing the values by 4
 350                  * will not work, as colors 1, 2 and 3 will be scaled-down
 351                  * to zero rendering them invisible.  So empirically convert
 352                  * colors to a sane 4-level grayscale.
 353                  */
 354                 switch (color) {
 355                 case 0:
 356                         color = 0; /* black */
 357                         break;
 358                 case 1 ... 6:
 359                         color = 2; /* white */
 360                         break;
 361                 case 7 ... 8:
 362                         color = 1; /* gray */
 363                         break;
 364                 default:
 365                         color = 3; /* intense white */
 366                         break;
 367                 }
 368                 break;
 369         case 3:
 370                 /*
 371                  * Last 8 entries of default 16-color palette is a more intense
 372                  * version of the first 8 (i.e., same chrominance, different
 373                  * luminance).
 374                  */
 375                 color &= 7;
 376                 break;
 377         }
 378
 379
 380         return color;
 381 }
 382
 383 static void fbcon_update_softback(struct vc_data *vc)
 384 {
 385         int l = fbcon_softback_size / vc->vc_size_row;
 386
 387         if (l > 5)
 388                 softback_end = softback_buf + l * vc->vc_size_row;
 389         else
 390                 /* Smaller scrollback makes no sense, and 0 would screw
 391                    the operation totally */
 392                 softback_top = 0;
 393 }
 394
 395 static void fb_flashcursor(struct work_struct *work)
 396 {
 397         struct fb_info *info = container_of(work, struct fb_info, queue);
 398         struct fbcon_ops *ops = info->fbcon_par;
 399         struct display *p;
 400         struct vc_data *vc = NULL;
 401         int c;
 402         int mode;
 403
 404         acquire_console_sem();
 405         if (ops && ops->currcon != -1)
 406                 vc = vc_cons[ops->currcon].d;
 407
 408         if (!vc || !CON_IS_VISIBLE(vc) ||
 409             registered_fb[con2fb_map[vc->vc_num]] != info ||
 410             vc->vc_deccm != 1) {
 411                 release_console_sem();
 412                 return;
 413         }
 414
 415         p = &fb_display[vc->vc_num];
 416         c = scr_readw((u16 *) vc->vc_pos);
 417         mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
 418                 CM_ERASE : CM_DRAW;
 419         ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
 420                     get_color(vc, info, c, 0));
 421         release_console_sem();
 422 }
 423
 424 #if defined(CONFIG_ATARI) || defined(CONFIG_MAC)
 425 static int cursor_blink_rate;
 426 static irqreturn_t fb_vbl_handler(int irq, void *dev_id)
 427 {
 428         struct fb_info *info = dev_id;
 429
 430         if (vbl_cursor_cnt && --vbl_cursor_cnt == 0) {
 431                 schedule_work(&info->queue);
 432                 vbl_cursor_cnt = cursor_blink_rate;
 433         }
 434         return IRQ_HANDLED;
 435 }
 436 #endif
 437
 438 static void cursor_timer_handler(unsigned long dev_addr)
 439 {
 440         struct fb_info *info = (struct fb_info *) dev_addr;
 441         struct fbcon_ops *ops = info->fbcon_par;
 442
 443         schedule_work(&info->queue);
 444         mod_timer(&ops->cursor_timer, jiffies + HZ/5);
 445 }
 446
 447 static void fbcon_add_cursor_timer(struct fb_info *info)
 448 {
 449         struct fbcon_ops *ops = info->fbcon_par;
 450
 451         if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
 452             !(ops->flags & FBCON_FLAGS_CURSOR_TIMER) &&
 453             !fbcon_cursor_noblink) {
 454                 if (!info->queue.func)
 455                         INIT_WORK(&info->queue, fb_flashcursor);
 456
 457                 init_timer(&ops->cursor_timer);
 458                 ops->cursor_timer.function = cursor_timer_handler;
 459                 ops->cursor_timer.expires = jiffies + HZ / 5;
 460                 ops->cursor_timer.data = (unsigned long ) info;
 461                 add_timer(&ops->cursor_timer);
 462                 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
 463         }
 464 }
 465
 466 static void fbcon_del_cursor_timer(struct fb_info *info)
 467 {
 468         struct fbcon_ops *ops = info->fbcon_par;
 469
 470         if (info->queue.func == fb_flashcursor &&
 471             ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
 472                 del_timer_sync(&ops->cursor_timer);
 473                 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
 474         }
 475 }
 476
 477 #ifndef MODULE
 478 static int __init fb_console_setup(char *this_opt)
 479 {
 480         char *options;
 481         int i, j;
 482
 483         if (!this_opt || !*this_opt)
 484                 return 1;
 485
 486         while ((options = strsep(&this_opt, ",")) != NULL) {
 487                 if (!strncmp(options, "font:", 5))
 488                         strcpy(fontname, options + 5);
 489
 490                 if (!strncmp(options, "scrollback:", 11)) {
 491                         options += 11;
 492                         if (*options) {
 493                                 fbcon_softback_size = simple_strtoul(options, &options, 0);
 494                                 if (*options == 'k' || *options == 'K') {
 495                                         fbcon_softback_size *= 1024;
 496                                         options++;
 497                                 }
 498                                 if (*options != ',')
 499                                         return 1;
 500                                 options++;
 501                         } else
 502                                 return 1;
 503                 }
 504
 505                 if (!strncmp(options, "map:", 4)) {
 506                         options += 4;
 507                         if (*options) {
 508                                 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
 509                                         if (!options[j])
 510                                                 j = 0;
 511                                         con2fb_map_boot[i] =
 512                                                 (options[j++]-'0') % FB_MAX;
 513                                 }
 514
 515                                 fbcon_map_override();
 516                         }
 517
 518                         return 1;
 519                 }
 520
 521                 if (!strncmp(options, "vc:", 3)) {
 522                         options += 3;
 523                         if (*options)
 524                                 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
 525                         if (first_fb_vc < 0)
 526                                 first_fb_vc = 0;
 527                         if (*options++ == '-')
 528                                 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
 529                         fbcon_is_default = 0;
 530                 }
 531
 532                 if (!strncmp(options, "rotate:", 7)) {
 533                         options += 7;
 534                         if (*options)
 535                                 initial_rotation = simple_strtoul(options, &options, 0);
 536                         if (initial_rotation > 3)
 537                                 initial_rotation = 0;
 538                 }
 539         }
 540         return 1;
 541 }
 542
 543 __setup("fbcon=", fb_console_setup);
 544 #endif
 545
 546 static int search_fb_in_map(int idx)
 547 {
 548         int i, retval = 0;
 549
 550         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 551                 if (con2fb_map[i] == idx)
 552                         retval = 1;
 553         }
 554         return retval;
 555 }
 556
 557 static int search_for_mapped_con(void)
 558 {
 559         int i, retval = 0;
 560
 561         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 562                 if (con2fb_map[i] != -1)
 563                         retval = 1;
 564         }
 565         return retval;
 566 }
 567
 568 static int fbcon_takeover(int show_logo)
 569 {
 570         int err, i;
 571
 572         if (!num_registered_fb)
 573                 return -ENODEV;
 574
 575         if (!show_logo)
 576                 logo_shown = FBCON_LOGO_DONTSHOW;
 577
 578         for (i = first_fb_vc; i <= last_fb_vc; i++)
 579                 con2fb_map[i] = info_idx;
 580
 581         err = take_over_console(&fb_con, first_fb_vc, last_fb_vc,
 582                                 fbcon_is_default);
 583
 584         if (err) {
 585                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
 586                         con2fb_map[i] = -1;
 587                 }
 588                 info_idx = -1;
 589         }
 590
 591         return err;
 592 }
 593
 594 #ifdef MODULE
 595 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
 596                                int cols, int rows, int new_cols, int new_rows)
 597 {
 598         logo_shown = FBCON_LOGO_DONTSHOW;
 599 }
 600 #else
 601 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
 602                                int cols, int rows, int new_cols, int new_rows)
 603 {
 604         /* Need to make room for the logo */
 605         struct fbcon_ops *ops = info->fbcon_par;
 606         int cnt, erase = vc->vc_video_erase_char, step;
 607         unsigned short *save = NULL, *r, *q;
 608         int logo_height;
 609
 610         if (info->flags & FBINFO_MODULE) {
 611                 logo_shown = FBCON_LOGO_DONTSHOW;
 612                 return;
 613         }
 614
 615         /*
 616          * remove underline attribute from erase character
 617          * if black and white framebuffer.
 618          */
 619         if (fb_get_color_depth(&info->var, &info->fix) == 1)
 620                 erase &= ~0x400;
 621         logo_height = fb_prepare_logo(info, ops->rotate);
 622         logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height);
 623         q = (unsigned short *) (vc->vc_origin +
 624                                 vc->vc_size_row * rows);
 625         step = logo_lines * cols;
 626         for (r = q - logo_lines * cols; r < q; r++)
 627                 if (scr_readw(r) != vc->vc_video_erase_char)
 628                         break;
 629         if (r != q && new_rows >= rows + logo_lines) {
 630                 save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
 631                 if (save) {
 632                         int i = cols < new_cols ? cols : new_cols;
 633                         scr_memsetw(save, erase, logo_lines * new_cols * 2);
 634                         r = q - step;
 635                         for (cnt = 0; cnt < logo_lines; cnt++, r += i)
 636                                 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
 637                         r = q;
 638                 }
 639         }
 640         if (r == q) {
 641                 /* We can scroll screen down */
 642                 r = q - step - cols;
 643                 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
 644                         scr_memcpyw(r + step, r, vc->vc_size_row);
 645                         r -= cols;
 646                 }
 647                 if (!save) {
 648                         int lines;
 649                         if (vc->vc_y + logo_lines >= rows)
 650                                 lines = rows - vc->vc_y - 1;
 651                         else
 652                                 lines = logo_lines;
 653                         vc->vc_y += lines;
 654                         vc->vc_pos += lines * vc->vc_size_row;
 655                 }
 656         }
 657         scr_memsetw((unsigned short *) vc->vc_origin,
 658                     erase,
 659                     vc->vc_size_row * logo_lines);
 660
 661         if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
 662                 fbcon_clear_margins(vc, 0);
 663                 update_screen(vc);
 664         }
 665
 666         if (save) {
 667                 q = (unsigned short *) (vc->vc_origin +
 668                                         vc->vc_size_row *
 669                                         rows);
 670                 scr_memcpyw(q, save, logo_lines * new_cols * 2);
 671                 vc->vc_y += logo_lines;
 672                 vc->vc_pos += logo_lines * vc->vc_size_row;
 673                 kfree(save);
 674         }
 675
 676         if (logo_lines > vc->vc_bottom) {
 677                 logo_shown = FBCON_LOGO_CANSHOW;
 678                 printk(KERN_INFO
 679                        "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
 680         } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
 681                 logo_shown = FBCON_LOGO_DRAW;
 682                 vc->vc_top = logo_lines;
 683         }
 684 }
 685 #endif /* MODULE */
 686
 687 #ifdef CONFIG_FB_TILEBLITTING
 688 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
 689 {
 690         struct fbcon_ops *ops = info->fbcon_par;
 691
 692         ops->p = &fb_display[vc->vc_num];
 693
 694         if ((info->flags & FBINFO_MISC_TILEBLITTING))
 695                 fbcon_set_tileops(vc, info);
 696         else {
 697                 fbcon_set_rotation(info);
 698                 fbcon_set_bitops(ops);
 699         }
 700 }
 701
 702 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
 703 {
 704         int err = 0;
 705
 706         if (info->flags & FBINFO_MISC_TILEBLITTING &&
 707             info->tileops->fb_get_tilemax(info) < charcount)
 708                 err = 1;
 709
 710         return err;
 711 }
 712 #else
 713 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
 714 {
 715         struct fbcon_ops *ops = info->fbcon_par;
 716
 717         info->flags &= ~FBINFO_MISC_TILEBLITTING;
 718         ops->p = &fb_display[vc->vc_num];
 719         fbcon_set_rotation(info);
 720         fbcon_set_bitops(ops);
 721 }
 722
 723 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
 724 {
 725         return 0;
 726 }
 727
 728 #endif /* CONFIG_MISC_TILEBLITTING */
 729
 730
 731 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
 732                                   int unit, int oldidx)
 733 {
 734         struct fbcon_ops *ops = NULL;
 735         int err = 0;
 736
 737         if (!try_module_get(info->fbops->owner))
 738                 err = -ENODEV;
 739
 740         if (!err && info->fbops->fb_open &&
 741             info->fbops->fb_open(info, 0))
 742                 err = -ENODEV;
 743
 744         if (!err) {
 745                 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
 746                 if (!ops)
 747                         err = -ENOMEM;
 748         }
 749
 750         if (!err) {
 751                 info->fbcon_par = ops;
 752
 753                 if (vc)
 754                         set_blitting_type(vc, info);
 755         }
 756
 757         if (err) {
 758                 con2fb_map[unit] = oldidx;
 759                 module_put(info->fbops->owner);
 760         }
 761
 762         return err;
 763 }
 764
 765 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
 766                                   struct fb_info *newinfo, int unit,
 767                                   int oldidx, int found)
 768 {
 769         struct fbcon_ops *ops = oldinfo->fbcon_par;
 770         int err = 0;
 771
 772         if (oldinfo->fbops->fb_release &&
 773             oldinfo->fbops->fb_release(oldinfo, 0)) {
 774                 con2fb_map[unit] = oldidx;
 775                 if (!found && newinfo->fbops->fb_release)
 776                         newinfo->fbops->fb_release(newinfo, 0);
 777                 if (!found)
 778                         module_put(newinfo->fbops->owner);
 779                 err = -ENODEV;
 780         }
 781
 782         if (!err) {
 783                 fbcon_del_cursor_timer(oldinfo);
 784                 kfree(ops->cursor_state.mask);
 785                 kfree(ops->cursor_data);
 786                 kfree(ops->fontbuffer);
 787                 kfree(oldinfo->fbcon_par);
 788                 oldinfo->fbcon_par = NULL;
 789                 module_put(oldinfo->fbops->owner);
 790                 /*
 791                   If oldinfo and newinfo are driving the same hardware,
 792                   the fb_release() method of oldinfo may attempt to
 793                   restore the hardware state.  This will leave the
 794                   newinfo in an undefined state. Thus, a call to
 795                   fb_set_par() may be needed for the newinfo.
 796                 */
 797                 if (newinfo->fbops->fb_set_par)
 798                         newinfo->fbops->fb_set_par(newinfo);
 799         }
 800
 801         return err;
 802 }
 803
 804 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
 805                                 int unit, int show_logo)
 806 {
 807         struct fbcon_ops *ops = info->fbcon_par;
 808
 809         ops->currcon = fg_console;
 810
 811         if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT))
 812                 info->fbops->fb_set_par(info);
 813
 814         ops->flags |= FBCON_FLAGS_INIT;
 815         ops->graphics = 0;
 816         fbcon_set_disp(info, &info->var, unit);
 817
 818         if (show_logo) {
 819                 struct vc_data *fg_vc = vc_cons[fg_console].d;
 820                 struct fb_info *fg_info =
 821                         registered_fb[con2fb_map[fg_console]];
 822
 823                 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
 824                                    fg_vc->vc_rows, fg_vc->vc_cols,
 825                                    fg_vc->vc_rows);
 826         }
 827
 828         update_screen(vc_cons[fg_console].d);
 829 }
 830
 831 /**
 832  *      set_con2fb_map - map console to frame buffer device
 833  *      @unit: virtual console number to map
 834  *      @newidx: frame buffer index to map virtual console to
 835  *      @user: user request
 836  *
 837  *      Maps a virtual console @unit to a frame buffer device
 838  *      @newidx.
 839  */
 840 static int set_con2fb_map(int unit, int newidx, int user)
 841 {
 842         struct vc_data *vc = vc_cons[unit].d;
 843         int oldidx = con2fb_map[unit];
 844         struct fb_info *info = registered_fb[newidx];
 845         struct fb_info *oldinfo = NULL;
 846         int found, err = 0;
 847
 848         if (oldidx == newidx)
 849                 return 0;
 850
 851         if (!info || fbcon_has_exited)
 852                 return -EINVAL;
 853
 854         if (!err && !search_for_mapped_con()) {
 855                 info_idx = newidx;
 856                 return fbcon_takeover(0);
 857         }
 858
 859         if (oldidx != -1)
 860                 oldinfo = registered_fb[oldidx];
 861
 862         found = search_fb_in_map(newidx);
 863
 864         acquire_console_sem();
 865         con2fb_map[unit] = newidx;
 866         if (!err && !found)
 867                 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
 868
 869
 870         /*
 871          * If old fb is not mapped to any of the consoles,
 872          * fbcon should release it.
 873          */
 874         if (!err && oldinfo && !search_fb_in_map(oldidx))
 875                 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
 876                                              found);
 877
 878         if (!err) {
 879                 int show_logo = (fg_console == 0 && !user &&
 880                                  logo_shown != FBCON_LOGO_DONTSHOW);
 881
 882                 if (!found)
 883                         fbcon_add_cursor_timer(info);
 884                 con2fb_map_boot[unit] = newidx;
 885                 con2fb_init_display(vc, info, unit, show_logo);
 886         }
 887
 888         if (!search_fb_in_map(info_idx))
 889                 info_idx = newidx;
 890
 891         release_console_sem();
 892         return err;
 893 }
 894
 895 /*
 896  *  Low Level Operations
 897  */
 898 /* NOTE: fbcon cannot be __init: it may be called from take_over_console later */
 899 static int var_to_display(struct display *disp,
 900                           struct fb_var_screeninfo *var,
 901                           struct fb_info *info)
 902 {
 903         disp->xres_virtual = var->xres_virtual;
 904         disp->yres_virtual = var->yres_virtual;
 905         disp->bits_per_pixel = var->bits_per_pixel;
 906         disp->grayscale = var->grayscale;
 907         disp->nonstd = var->nonstd;
 908         disp->accel_flags = var->accel_flags;
 909         disp->height = var->height;
 910         disp->width = var->width;
 911         disp->red = var->red;
 912         disp->green = var->green;
 913         disp->blue = var->blue;
 914         disp->transp = var->transp;
 915         disp->rotate = var->rotate;
 916         disp->mode = fb_match_mode(var, &info->modelist);
 917         if (disp->mode == NULL)
 918                 /* This should not happen */
 919                 return -EINVAL;
 920         return 0;
 921 }
 922
 923 static void display_to_var(struct fb_var_screeninfo *var,
 924                            struct display *disp)
 925 {
 926         fb_videomode_to_var(var, disp->mode);
 927         var->xres_virtual = disp->xres_virtual;
 928         var->yres_virtual = disp->yres_virtual;
 929         var->bits_per_pixel = disp->bits_per_pixel;
 930         var->grayscale = disp->grayscale;
 931         var->nonstd = disp->nonstd;
 932         var->accel_flags = disp->accel_flags;
 933         var->height = disp->height;
 934         var->width = disp->width;
 935         var->red = disp->red;
 936         var->green = disp->green;
 937         var->blue = disp->blue;
 938         var->transp = disp->transp;
 939         var->rotate = disp->rotate;
 940 }
 941
 942 static const char *fbcon_startup(void)
 943 {
 944         const char *display_desc = "frame buffer device";
 945         struct display *p = &fb_display[fg_console];
 946         struct vc_data *vc = vc_cons[fg_console].d;
 947         const struct font_desc *font = NULL;
 948         struct module *owner;
 949         struct fb_info *info = NULL;
 950         struct fbcon_ops *ops;
 951         int rows, cols;
 952         int irqres;
 953
 954         irqres = 1;
 955         /*
 956          *  If num_registered_fb is zero, this is a call for the dummy part.
 957          *  The frame buffer devices weren't initialized yet.
 958          */
 959         if (!num_registered_fb || info_idx == -1)
 960                 return display_desc;
 961         /*
 962          * Instead of blindly using registered_fb[0], we use info_idx, set by
 963          * fb_console_init();
 964          */
 965         info = registered_fb[info_idx];
 966         if (!info)
 967                 return NULL;
 968
 969         owner = info->fbops->owner;
 970         if (!try_module_get(owner))
 971                 return NULL;
 972         if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
 973                 module_put(owner);
 974                 return NULL;
 975         }
 976
 977         ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
 978         if (!ops) {
 979                 module_put(owner);
 980                 return NULL;
 981         }
 982
 983         ops->currcon = -1;
 984         ops->graphics = 1;
 985         ops->cur_rotate = -1;
 986         info->fbcon_par = ops;
 987         p->con_rotate = initial_rotation;
 988         set_blitting_type(vc, info);
 989
 990         if (info->fix.type != FB_TYPE_TEXT) {
 991                 if (fbcon_softback_size) {
 992                         if (!softback_buf) {
 993                                 softback_buf =
 994                                     (unsigned long)
 995                                     kmalloc(fbcon_softback_size,
 996                                             GFP_KERNEL);
 997                                 if (!softback_buf) {
 998                                         fbcon_softback_size = 0;
 999                                         softback_top = 0;
1000                                 }
1001                         }
1002                 } else {
1003                         if (softback_buf) {
1004                                 kfree((void *) softback_buf);
1005                                 softback_buf = 0;
1006                                 softback_top = 0;
1007                         }
1008                 }
1009                 if (softback_buf)
1010                         softback_in = softback_top = softback_curr =
1011                             softback_buf;
1012                 softback_lines = 0;
1013         }
1014
1015         /* Setup default font */
1016         if (!p->fontdata) {
1017                 if (!fontname[0] || !(font = find_font(fontname)))
1018                         font = get_default_font(info->var.xres,
1019                                                 info->var.yres,
1020                                                 info->pixmap.blit_x,
1021                                                 info->pixmap.blit_y);
1022                 vc->vc_font.width = font->width;
1023                 vc->vc_font.height = font->height;
1024                 vc->vc_font.data = (void *)(p->fontdata = font->data);
1025                 vc->vc_font.charcount = 256; /* FIXME  Need to support more fonts */
1026         }
1027
1028         cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1029         rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1030         cols /= vc->vc_font.width;
1031         rows /= vc->vc_font.height;
1032         vc_resize(vc, cols, rows);
1033
1034         DPRINTK("mode:   %s\n", info->fix.id);
1035         DPRINTK("visual: %d\n", info->fix.visual);
1036         DPRINTK("res:    %dx%d-%d\n", info->var.xres,
1037                 info->var.yres,
1038                 info->var.bits_per_pixel);
1039
1040 #ifdef CONFIG_ATARI
1041         if (MACH_IS_ATARI) {
1042                 cursor_blink_rate = ATARI_CURSOR_BLINK_RATE;
1043                 irqres =
1044                     request_irq(IRQ_AUTO_4, fb_vbl_handler,
1045                                 IRQ_TYPE_PRIO, "framebuffer vbl",
1046                                 info);
1047         }
1048 #endif                          /* CONFIG_ATARI */
1049
1050 #ifdef CONFIG_MAC
1051         /*
1052          * On a Macintoy, the VBL interrupt may or may not be active.
1053          * As interrupt based cursor is more reliable and race free, we
1054          * probe for VBL interrupts.
1055          */
1056         if (MACH_IS_MAC) {
1057                 int ct = 0;
1058                 /*
1059                  * Probe for VBL: set temp. handler ...
1060                  */
1061                 irqres = request_irq(IRQ_MAC_VBL, fb_vbl_detect, 0,
1062                                      "framebuffer vbl", info);
1063                 vbl_detected = 0;
1064
1065                 /*
1066                  * ... and spin for 20 ms ...
1067                  */
1068                 while (!vbl_detected && ++ct < 1000)
1069                         udelay(20);
1070
1071                 if (ct == 1000)
1072                         printk
1073                             ("fbcon_startup: No VBL detected, using timer based cursor.\n");
1074
1075                 free_irq(IRQ_MAC_VBL, fb_vbl_detect);
1076
1077                 if (vbl_detected) {
1078                         /*
1079                          * interrupt based cursor ok
1080                          */
1081                         cursor_blink_rate = MAC_CURSOR_BLINK_RATE;
1082                         irqres =
1083                             request_irq(IRQ_MAC_VBL, fb_vbl_handler, 0,
1084                                         "framebuffer vbl", info);
1085                 } else {
1086                         /*
1087                          * VBL not detected: fall through, use timer based cursor
1088                          */
1089                         irqres = 1;
1090                 }
1091         }
1092 #endif                          /* CONFIG_MAC */
1093
1094         fbcon_add_cursor_timer(info);
1095         fbcon_has_exited = 0;
1096         return display_desc;
1097 }
1098
1099 static void fbcon_init(struct vc_data *vc, int init)
1100 {
1101         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1102         struct fbcon_ops *ops;
1103         struct vc_data **default_mode = vc->vc_display_fg;
1104         struct vc_data *svc = *default_mode;
1105         struct display *t, *p = &fb_display[vc->vc_num];
1106         int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
1107         int cap;
1108
1109         if (info_idx == -1 || info == NULL)
1110             return;
1111
1112         cap = info->flags;
1113
1114         if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1115             (info->fix.type == FB_TYPE_TEXT))
1116                 logo = 0;
1117
1118         if (var_to_display(p, &info->var, info))
1119                 return;
1120
1121         if (!info->fbcon_par)
1122                 con2fb_acquire_newinfo(vc, info, vc->vc_num, -1);
1123
1124         /* If we are not the first console on this
1125            fb, copy the font from that console */
1126         t = &fb_display[fg_console];
1127         if (!p->fontdata) {
1128                 if (t->fontdata) {
1129                         struct vc_data *fvc = vc_cons[fg_console].d;
1130
1131                         vc->vc_font.data = (void *)(p->fontdata =
1132                                                     fvc->vc_font.data);
1133                         vc->vc_font.width = fvc->vc_font.width;
1134                         vc->vc_font.height = fvc->vc_font.height;
1135                         p->userfont = t->userfont;
1136
1137                         if (p->userfont)
1138                                 REFCOUNT(p->fontdata)++;
1139                 } else {
1140                         const struct font_desc *font = NULL;
1141
1142                         if (!fontname[0] || !(font = find_font(fontname)))
1143                                 font = get_default_font(info->var.xres,
1144                                                         info->var.yres,
1145                                                         info->pixmap.blit_x,
1146                                                         info->pixmap.blit_y);
1147                         vc->vc_font.width = font->width;
1148                         vc->vc_font.height = font->height;
1149                         vc->vc_font.data = (void *)(p->fontdata = font->data);
1150                         vc->vc_font.charcount = 256; /* FIXME  Need to
1151                                                         support more fonts */
1152                 }
1153         }
1154
1155         if (p->userfont)
1156                 charcnt = FNTCHARCNT(p->fontdata);
1157
1158         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1159         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1160         if (charcnt == 256) {
1161                 vc->vc_hi_font_mask = 0;
1162         } else {
1163                 vc->vc_hi_font_mask = 0x100;
1164                 if (vc->vc_can_do_color)
1165                         vc->vc_complement_mask <<= 1;
1166         }
1167
1168         if (!*svc->vc_uni_pagedir_loc)
1169                 con_set_default_unimap(svc);
1170         if (!*vc->vc_uni_pagedir_loc)
1171                 con_copy_unimap(vc, svc);
1172
1173         ops = info->fbcon_par;
1174         p->con_rotate = initial_rotation;
1175         set_blitting_type(vc, info);
1176
1177         cols = vc->vc_cols;
1178         rows = vc->vc_rows;
1179         new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1180         new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1181         new_cols /= vc->vc_font.width;
1182         new_rows /= vc->vc_font.height;
1183         vc_resize(vc, new_cols, new_rows);
1184
1185         /*
1186          * We must always set the mode. The mode of the previous console
1187          * driver could be in the same resolution but we are using different
1188          * hardware so we have to initialize the hardware.
1189          *
1190          * We need to do it in fbcon_init() to prevent screen corruption.
1191          */
1192         if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
1193                 if (info->fbops->fb_set_par &&
1194                     !(ops->flags & FBCON_FLAGS_INIT))
1195                         info->fbops->fb_set_par(info);
1196                 ops->flags |= FBCON_FLAGS_INIT;
1197         }
1198
1199         ops->graphics = 0;
1200
1201         if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1202             !(cap & FBINFO_HWACCEL_DISABLED))
1203                 p->scrollmode = SCROLL_MOVE;
1204         else /* default to something safe */
1205                 p->scrollmode = SCROLL_REDRAW;
1206
1207         /*
1208          *  ++guenther: console.c:vc_allocate() relies on initializing
1209          *  vc_{cols,rows}, but we must not set those if we are only
1210          *  resizing the console.
1211          */
1212         if (!init) {
1213                 vc->vc_cols = new_cols;
1214                 vc->vc_rows = new_rows;
1215         }
1216
1217         if (logo)
1218                 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1219
1220         if (vc == svc && softback_buf)
1221                 fbcon_update_softback(vc);
1222
1223         if (ops->rotate_font && ops->rotate_font(info, vc)) {
1224                 ops->rotate = FB_ROTATE_UR;
1225                 set_blitting_type(vc, info);
1226         }
1227
1228         ops->p = &fb_display[fg_console];
1229 }
1230
1231 static void fbcon_free_font(struct display *p)
1232 {
1233         if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1234                 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1235         p->fontdata = NULL;
1236         p->userfont = 0;
1237 }
1238
1239 static void fbcon_deinit(struct vc_data *vc)
1240 {
1241         struct display *p = &fb_display[vc->vc_num];
1242         struct fb_info *info;
1243         struct fbcon_ops *ops;
1244         int idx;
1245
1246         fbcon_free_font(p);
1247         idx = con2fb_map[vc->vc_num];
1248
1249         if (idx == -1)
1250                 goto finished;
1251
1252         info = registered_fb[idx];
1253
1254         if (!info)
1255                 goto finished;
1256
1257         ops = info->fbcon_par;
1258
1259         if (!ops)
1260                 goto finished;
1261
1262         if (CON_IS_VISIBLE(vc))
1263                 fbcon_del_cursor_timer(info);
1264
1265         ops->flags &= ~FBCON_FLAGS_INIT;
1266 finished:
1267
1268         if (!con_is_bound(&fb_con))
1269                 fbcon_exit();
1270
1271         return;
1272 }
1273
1274 /* ====================================================================== */
1275
1276 /*  fbcon_XXX routines - interface used by the world
1277  *
1278  *  This system is now divided into two levels because of complications
1279  *  caused by hardware scrolling. Top level functions:
1280  *
1281  *      fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1282  *
1283  *  handles y values in range [0, scr_height-1] that correspond to real
1284  *  screen positions. y_wrap shift means that first line of bitmap may be
1285  *  anywhere on this display. These functions convert lineoffsets to
1286  *  bitmap offsets and deal with the wrap-around case by splitting blits.
1287  *
1288  *      fbcon_bmove_physical_8()    -- These functions fast implementations
1289  *      fbcon_clear_physical_8()    -- of original fbcon_XXX fns.
1290  *      fbcon_putc_physical_8()     -- (font width != 8) may be added later
1291  *
1292  *  WARNING:
1293  *
1294  *  At the moment fbcon_putc() cannot blit across vertical wrap boundary
1295  *  Implies should only really hardware scroll in rows. Only reason for
1296  *  restriction is simplicity & efficiency at the moment.
1297  */
1298
1299 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1300                         int width)
1301 {
1302         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1303         struct fbcon_ops *ops = info->fbcon_par;
1304
1305         struct display *p = &fb_display[vc->vc_num];
1306         u_int y_break;
1307
1308         if (fbcon_is_inactive(vc, info))
1309                 return;
1310
1311         if (!height || !width)
1312                 return;
1313
1314         /* Split blits that cross physical y_wrap boundary */
1315
1316         y_break = p->vrows - p->yscroll;
1317         if (sy < y_break && sy + height - 1 >= y_break) {
1318                 u_int b = y_break - sy;
1319                 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1320                 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1321                                  width);
1322         } else
1323                 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1324 }
1325
1326 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1327                         int count, int ypos, int xpos)
1328 {
1329         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1330         struct display *p = &fb_display[vc->vc_num];
1331         struct fbcon_ops *ops = info->fbcon_par;
1332
1333         if (!fbcon_is_inactive(vc, info))
1334                 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1335                            get_color(vc, info, scr_readw(s), 1),
1336                            get_color(vc, info, scr_readw(s), 0));
1337 }
1338
1339 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1340 {
1341         unsigned short chr;
1342
1343         scr_writew(c, &chr);
1344         fbcon_putcs(vc, &chr, 1, ypos, xpos);
1345 }
1346
1347 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1348 {
1349         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1350         struct fbcon_ops *ops = info->fbcon_par;
1351
1352         if (!fbcon_is_inactive(vc, info))
1353                 ops->clear_margins(vc, info, bottom_only);
1354 }
1355
1356 static void fbcon_cursor(struct vc_data *vc, int mode)
1357 {
1358         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1359         struct fbcon_ops *ops = info->fbcon_par;
1360         int y;
1361         int c = scr_readw((u16 *) vc->vc_pos);
1362
1363         if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
1364                 return;
1365
1366         if (vc->vc_cursor_type & 0x10)
1367                 fbcon_del_cursor_timer(info);
1368         else
1369                 fbcon_add_cursor_timer(info);
1370
1371         ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1372         if (mode & CM_SOFTBACK) {
1373                 mode &= ~CM_SOFTBACK;
1374                 y = softback_lines;
1375         } else {
1376                 if (softback_lines)
1377                         fbcon_set_origin(vc);
1378                 y = 0;
1379         }
1380
1381         ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
1382                     get_color(vc, info, c, 0));
1383         vbl_cursor_cnt = CURSOR_DRAW_DELAY;
1384 }
1385
1386 static int scrollback_phys_max = 0;
1387 static int scrollback_max = 0;
1388 static int scrollback_current = 0;
1389
1390 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1391                            int unit)
1392 {
1393         struct display *p, *t;
1394         struct vc_data **default_mode, *vc;
1395         struct vc_data *svc;
1396         struct fbcon_ops *ops = info->fbcon_par;
1397         int rows, cols, charcnt = 256;
1398
1399         p = &fb_display[unit];
1400
1401         if (var_to_display(p, var, info))
1402                 return;
1403
1404         vc = vc_cons[unit].d;
1405
1406         if (!vc)
1407                 return;
1408
1409         default_mode = vc->vc_display_fg;
1410         svc = *default_mode;
1411         t = &fb_display[svc->vc_num];
1412
1413         if (!vc->vc_font.data) {
1414                 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1415                 vc->vc_font.width = (*default_mode)->vc_font.width;
1416                 vc->vc_font.height = (*default_mode)->vc_font.height;
1417                 p->userfont = t->userfont;
1418                 if (p->userfont)
1419                         REFCOUNT(p->fontdata)++;
1420         }
1421         if (p->userfont)
1422                 charcnt = FNTCHARCNT(p->fontdata);
1423
1424         var->activate = FB_ACTIVATE_NOW;
1425         info->var.activate = var->activate;
1426         var->yoffset = info->var.yoffset;
1427         var->xoffset = info->var.xoffset;
1428         fb_set_var(info, var);
1429         ops->var = info->var;
1430         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1431         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1432         if (charcnt == 256) {
1433                 vc->vc_hi_font_mask = 0;
1434         } else {
1435                 vc->vc_hi_font_mask = 0x100;
1436                 if (vc->vc_can_do_color)
1437                         vc->vc_complement_mask <<= 1;
1438         }
1439
1440         if (!*svc->vc_uni_pagedir_loc)
1441                 con_set_default_unimap(svc);
1442         if (!*vc->vc_uni_pagedir_loc)
1443                 con_copy_unimap(vc, svc);
1444
1445         cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1446         rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1447         cols /= vc->vc_font.width;
1448         rows /= vc->vc_font.height;
1449         vc_resize(vc, cols, rows);
1450
1451         if (CON_IS_VISIBLE(vc)) {
1452                 update_screen(vc);
1453                 if (softback_buf)
1454                         fbcon_update_softback(vc);
1455         }
1456 }
1457
1458 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1459 {
1460         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1461         struct fbcon_ops *ops = info->fbcon_par;
1462         struct display *p = &fb_display[vc->vc_num];
1463
1464         p->yscroll += count;
1465         if (p->yscroll >= p->vrows)     /* Deal with wrap */
1466                 p->yscroll -= p->vrows;
1467         ops->var.xoffset = 0;
1468         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1469         ops->var.vmode |= FB_VMODE_YWRAP;
1470         ops->update_start(info);
1471         scrollback_max += count;
1472         if (scrollback_max > scrollback_phys_max)
1473                 scrollback_max = scrollback_phys_max;
1474         scrollback_current = 0;
1475 }
1476
1477 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1478 {
1479         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1480         struct fbcon_ops *ops = info->fbcon_par;
1481         struct display *p = &fb_display[vc->vc_num];
1482
1483         p->yscroll -= count;
1484         if (p->yscroll < 0)     /* Deal with wrap */
1485                 p->yscroll += p->vrows;
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         scrollback_max -= count;
1491         if (scrollback_max < 0)
1492                 scrollback_max = 0;
1493         scrollback_current = 0;
1494 }
1495
1496 static __inline__ void ypan_up(struct vc_data *vc, int count)
1497 {
1498         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1499         struct display *p = &fb_display[vc->vc_num];
1500         struct fbcon_ops *ops = info->fbcon_par;
1501
1502         p->yscroll += count;
1503         if (p->yscroll > p->vrows - vc->vc_rows) {
1504                 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1505                             0, 0, 0, vc->vc_rows, vc->vc_cols);
1506                 p->yscroll -= p->vrows - vc->vc_rows;
1507         }
1508
1509         ops->var.xoffset = 0;
1510         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1511         ops->var.vmode &= ~FB_VMODE_YWRAP;
1512         ops->update_start(info);
1513         fbcon_clear_margins(vc, 1);
1514         scrollback_max += count;
1515         if (scrollback_max > scrollback_phys_max)
1516                 scrollback_max = scrollback_phys_max;
1517         scrollback_current = 0;
1518 }
1519
1520 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1521 {
1522         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1523         struct fbcon_ops *ops = info->fbcon_par;
1524         struct display *p = &fb_display[vc->vc_num];
1525
1526         p->yscroll += count;
1527
1528         if (p->yscroll > p->vrows - vc->vc_rows) {
1529                 p->yscroll -= p->vrows - vc->vc_rows;
1530                 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1531         }
1532
1533         ops->var.xoffset = 0;
1534         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1535         ops->var.vmode &= ~FB_VMODE_YWRAP;
1536         ops->update_start(info);
1537         fbcon_clear_margins(vc, 1);
1538         scrollback_max += count;
1539         if (scrollback_max > scrollback_phys_max)
1540                 scrollback_max = scrollback_phys_max;
1541         scrollback_current = 0;
1542 }
1543
1544 static __inline__ void ypan_down(struct vc_data *vc, int count)
1545 {
1546         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1547         struct display *p = &fb_display[vc->vc_num];
1548         struct fbcon_ops *ops = info->fbcon_par;
1549
1550         p->yscroll -= count;
1551         if (p->yscroll < 0) {
1552                 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1553                             0, vc->vc_rows, vc->vc_cols);
1554                 p->yscroll += p->vrows - vc->vc_rows;
1555         }
1556
1557         ops->var.xoffset = 0;
1558         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1559         ops->var.vmode &= ~FB_VMODE_YWRAP;
1560         ops->update_start(info);
1561         fbcon_clear_margins(vc, 1);
1562         scrollback_max -= count;
1563         if (scrollback_max < 0)
1564                 scrollback_max = 0;
1565         scrollback_current = 0;
1566 }
1567
1568 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1569 {
1570         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1571         struct fbcon_ops *ops = info->fbcon_par;
1572         struct display *p = &fb_display[vc->vc_num];
1573
1574         p->yscroll -= count;
1575
1576         if (p->yscroll < 0) {
1577                 p->yscroll += p->vrows - vc->vc_rows;
1578                 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1579         }
1580
1581         ops->var.xoffset = 0;
1582         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1583         ops->var.vmode &= ~FB_VMODE_YWRAP;
1584         ops->update_start(info);
1585         fbcon_clear_margins(vc, 1);
1586         scrollback_max -= count;
1587         if (scrollback_max < 0)
1588                 scrollback_max = 0;
1589         scrollback_current = 0;
1590 }
1591
1592 static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1593                                   long delta)
1594 {
1595         int count = vc->vc_rows;
1596         unsigned short *d, *s;
1597         unsigned long n;
1598         int line = 0;
1599
1600         d = (u16 *) softback_curr;
1601         if (d == (u16 *) softback_in)
1602                 d = (u16 *) vc->vc_origin;
1603         n = softback_curr + delta * vc->vc_size_row;
1604         softback_lines -= delta;
1605         if (delta < 0) {
1606                 if (softback_curr < softback_top && n < softback_buf) {
1607                         n += softback_end - softback_buf;
1608                         if (n < softback_top) {
1609                                 softback_lines -=
1610                                     (softback_top - n) / vc->vc_size_row;
1611                                 n = softback_top;
1612                         }
1613                 } else if (softback_curr >= softback_top
1614                            && n < softback_top) {
1615                         softback_lines -=
1616                             (softback_top - n) / vc->vc_size_row;
1617                         n = softback_top;
1618                 }
1619         } else {
1620                 if (softback_curr > softback_in && n >= softback_end) {
1621                         n += softback_buf - softback_end;
1622                         if (n > softback_in) {
1623                                 n = softback_in;
1624                                 softback_lines = 0;
1625                         }
1626                 } else if (softback_curr <= softback_in && n > softback_in) {
1627                         n = softback_in;
1628                         softback_lines = 0;
1629                 }
1630         }
1631         if (n == softback_curr)
1632                 return;
1633         softback_curr = n;
1634         s = (u16 *) softback_curr;
1635         if (s == (u16 *) softback_in)
1636                 s = (u16 *) vc->vc_origin;
1637         while (count--) {
1638                 unsigned short *start;
1639                 unsigned short *le;
1640                 unsigned short c;
1641                 int x = 0;
1642                 unsigned short attr = 1;
1643
1644                 start = s;
1645                 le = advance_row(s, 1);
1646                 do {
1647                         c = scr_readw(s);
1648                         if (attr != (c & 0xff00)) {
1649                                 attr = c & 0xff00;
1650                                 if (s > start) {
1651                                         fbcon_putcs(vc, start, s - start,
1652                                                     line, x);
1653                                         x += s - start;
1654                                         start = s;
1655                                 }
1656                         }
1657                         if (c == scr_readw(d)) {
1658                                 if (s > start) {
1659                                         fbcon_putcs(vc, start, s - start,
1660                                                     line, x);
1661                                         x += s - start + 1;
1662                                         start = s + 1;
1663                                 } else {
1664                                         x++;
1665                                         start++;
1666                                 }
1667                         }
1668                         s++;
1669                         d++;
1670                 } while (s < le);
1671                 if (s > start)
1672                         fbcon_putcs(vc, start, s - start, line, x);
1673                 line++;
1674                 if (d == (u16 *) softback_end)
1675                         d = (u16 *) softback_buf;
1676                 if (d == (u16 *) softback_in)
1677                         d = (u16 *) vc->vc_origin;
1678                 if (s == (u16 *) softback_end)
1679                         s = (u16 *) softback_buf;
1680                 if (s == (u16 *) softback_in)
1681                         s = (u16 *) vc->vc_origin;
1682         }
1683 }
1684
1685 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1686                               int line, int count, int dy)
1687 {
1688         unsigned short *s = (unsigned short *)
1689                 (vc->vc_origin + vc->vc_size_row * line);
1690
1691         while (count--) {
1692                 unsigned short *start = s;
1693                 unsigned short *le = advance_row(s, 1);
1694                 unsigned short c;
1695                 int x = 0;
1696                 unsigned short attr = 1;
1697
1698                 do {
1699                         c = scr_readw(s);
1700                         if (attr != (c & 0xff00)) {
1701                                 attr = c & 0xff00;
1702                                 if (s > start) {
1703                                         fbcon_putcs(vc, start, s - start,
1704                                                     dy, x);
1705                                         x += s - start;
1706                                         start = s;
1707                                 }
1708                         }
1709                         console_conditional_schedule();
1710                         s++;
1711                 } while (s < le);
1712                 if (s > start)
1713                         fbcon_putcs(vc, start, s - start, dy, x);
1714                 console_conditional_schedule();
1715                 dy++;
1716         }
1717 }
1718
1719 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
1720                         struct display *p, int line, int count, int ycount)
1721 {
1722         int offset = ycount * vc->vc_cols;
1723         unsigned short *d = (unsigned short *)
1724             (vc->vc_origin + vc->vc_size_row * line);
1725         unsigned short *s = d + offset;
1726         struct fbcon_ops *ops = info->fbcon_par;
1727
1728         while (count--) {
1729                 unsigned short *start = s;
1730                 unsigned short *le = advance_row(s, 1);
1731                 unsigned short c;
1732                 int x = 0;
1733
1734                 do {
1735                         c = scr_readw(s);
1736
1737                         if (c == scr_readw(d)) {
1738                                 if (s > start) {
1739                                         ops->bmove(vc, info, line + ycount, x,
1740                                                    line, x, 1, s-start);
1741                                         x += s - start + 1;
1742                                         start = s + 1;
1743                                 } else {
1744                                         x++;
1745                                         start++;
1746                                 }
1747                         }
1748
1749                         scr_writew(c, d);
1750                         console_conditional_schedule();
1751                         s++;
1752                         d++;
1753                 } while (s < le);
1754                 if (s > start)
1755                         ops->bmove(vc, info, line + ycount, x, line, x, 1,
1756                                    s-start);
1757                 console_conditional_schedule();
1758                 if (ycount > 0)
1759                         line++;
1760                 else {
1761                         line--;
1762                         /* NOTE: We subtract two lines from these pointers */
1763                         s -= vc->vc_size_row;
1764                         d -= vc->vc_size_row;
1765                 }
1766         }
1767 }
1768
1769 static void fbcon_redraw(struct vc_data *vc, struct display *p,
1770                          int line, int count, int offset)
1771 {
1772         unsigned short *d = (unsigned short *)
1773             (vc->vc_origin + vc->vc_size_row * line);
1774         unsigned short *s = d + offset;
1775
1776         while (count--) {
1777                 unsigned short *start = s;
1778                 unsigned short *le = advance_row(s, 1);
1779                 unsigned short c;
1780                 int x = 0;
1781                 unsigned short attr = 1;
1782
1783                 do {
1784                         c = scr_readw(s);
1785                         if (attr != (c & 0xff00)) {
1786                                 attr = c & 0xff00;
1787                                 if (s > start) {
1788                                         fbcon_putcs(vc, start, s - start,
1789                                                     line, x);
1790                                         x += s - start;
1791                                         start = s;
1792                                 }
1793                         }
1794                         if (c == scr_readw(d)) {
1795                                 if (s > start) {
1796                                         fbcon_putcs(vc, start, s - start,
1797                                                      line, x);
1798                                         x += s - start + 1;
1799                                         start = s + 1;
1800                                 } else {
1801                                         x++;
1802                                         start++;
1803                                 }
1804                         }
1805                         scr_writew(c, d);
1806                         console_conditional_schedule();
1807                         s++;
1808                         d++;
1809                 } while (s < le);
1810                 if (s > start)
1811                         fbcon_putcs(vc, start, s - start, line, x);
1812                 console_conditional_schedule();
1813                 if (offset > 0)
1814                         line++;
1815                 else {
1816                         line--;
1817                         /* NOTE: We subtract two lines from these pointers */
1818                         s -= vc->vc_size_row;
1819                         d -= vc->vc_size_row;
1820                 }
1821         }
1822 }
1823
1824 static inline void fbcon_softback_note(struct vc_data *vc, int t,
1825                                        int count)
1826 {
1827         unsigned short *p;
1828
1829         if (vc->vc_num != fg_console)
1830                 return;
1831         p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1832
1833         while (count) {
1834                 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1835                 count--;
1836                 p = advance_row(p, 1);
1837                 softback_in += vc->vc_size_row;
1838                 if (softback_in == softback_end)
1839                         softback_in = softback_buf;
1840                 if (softback_in == softback_top) {
1841                         softback_top += vc->vc_size_row;
1842                         if (softback_top == softback_end)
1843                                 softback_top = softback_buf;
1844                 }
1845         }
1846         softback_curr = softback_in;
1847 }
1848
1849 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
1850                         int count)
1851 {
1852         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1853         struct display *p = &fb_display[vc->vc_num];
1854         int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1855         unsigned short saved_ec;
1856         int ret;
1857
1858         if (fbcon_is_inactive(vc, info))
1859                 return -EINVAL;
1860
1861         fbcon_cursor(vc, CM_ERASE);
1862
1863         /*
1864          * ++Geert: Only use ywrap/ypan if the console is in text mode
1865          * ++Andrew: Only use ypan on hardware text mode when scrolling the
1866          *           whole screen (prevents flicker).
1867          */
1868
1869         saved_ec = vc->vc_video_erase_char;
1870         vc->vc_video_erase_char = vc->vc_scrl_erase_char;
1871
1872         ret = 0;
1873
1874         switch (dir) {
1875         case SM_UP:
1876                 if (count > vc->vc_rows)        /* Maximum realistic size */
1877                         count = vc->vc_rows;
1878                 if (softback_top)
1879                         fbcon_softback_note(vc, t, count);
1880                 if (logo_shown >= 0)
1881                         goto redraw_up;
1882                 switch (p->scrollmode) {
1883                 case SCROLL_MOVE:
1884                         fbcon_redraw_blit(vc, info, p, t, b - t - count,
1885                                      count);
1886                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1887                         scr_memsetw((unsigned short *) (vc->vc_origin +
1888                                                         vc->vc_size_row *
1889                                                         (b - count)),
1890                                     vc->vc_scrl_erase_char,
1891                                     vc->vc_size_row * count);
1892                         ret = 1;
1893                         break;
1894
1895                 case SCROLL_WRAP_MOVE:
1896                         if (b - t - count > 3 * vc->vc_rows >> 2) {
1897                                 if (t > 0)
1898                                         fbcon_bmove(vc, 0, 0, count, 0, t,
1899                                                     vc->vc_cols);
1900                                 ywrap_up(vc, count);
1901                                 if (vc->vc_rows - b > 0)
1902                                         fbcon_bmove(vc, b - count, 0, b, 0,
1903                                                     vc->vc_rows - b,
1904                                                     vc->vc_cols);
1905                         } else if (info->flags & FBINFO_READS_FAST)
1906                                 fbcon_bmove(vc, t + count, 0, t, 0,
1907                                             b - t - count, vc->vc_cols);
1908                         else
1909                                 goto redraw_up;
1910                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1911                         break;
1912
1913                 case SCROLL_PAN_REDRAW:
1914                         if ((p->yscroll + count <=
1915                              2 * (p->vrows - vc->vc_rows))
1916                             && ((!scroll_partial && (b - t == vc->vc_rows))
1917                                 || (scroll_partial
1918                                     && (b - t - count >
1919                                         3 * vc->vc_rows >> 2)))) {
1920                                 if (t > 0)
1921                                         fbcon_redraw_move(vc, p, 0, t, count);
1922                                 ypan_up_redraw(vc, t, count);
1923                                 if (vc->vc_rows - b > 0)
1924                                         fbcon_redraw_move(vc, p, b,
1925                                                           vc->vc_rows - b, b);
1926                         } else
1927                                 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1928                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1929                         break;
1930
1931                 case SCROLL_PAN_MOVE:
1932                         if ((p->yscroll + count <=
1933                              2 * (p->vrows - vc->vc_rows))
1934                             && ((!scroll_partial && (b - t == vc->vc_rows))
1935                                 || (scroll_partial
1936                                     && (b - t - count >
1937                                         3 * vc->vc_rows >> 2)))) {
1938                                 if (t > 0)
1939                                         fbcon_bmove(vc, 0, 0, count, 0, t,
1940                                                     vc->vc_cols);
1941                                 ypan_up(vc, count);
1942                                 if (vc->vc_rows - b > 0)
1943                                         fbcon_bmove(vc, b - count, 0, b, 0,
1944                                                     vc->vc_rows - b,
1945                                                     vc->vc_cols);
1946                         } else if (info->flags & FBINFO_READS_FAST)
1947                                 fbcon_bmove(vc, t + count, 0, t, 0,
1948                                             b - t - count, vc->vc_cols);
1949                         else
1950                                 goto redraw_up;
1951                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1952                         break;
1953
1954                 case SCROLL_REDRAW:
1955                       redraw_up:
1956                         fbcon_redraw(vc, p, t, b - t - count,
1957                                      count * vc->vc_cols);
1958                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1959                         scr_memsetw((unsigned short *) (vc->vc_origin +
1960                                                         vc->vc_size_row *
1961                                                         (b - count)),
1962                                     vc->vc_scrl_erase_char,
1963                                     vc->vc_size_row * count);
1964                         ret = 1;
1965                         break;
1966                 }
1967                 break;
1968
1969         case SM_DOWN:
1970                 if (count > vc->vc_rows)        /* Maximum realistic size */
1971                         count = vc->vc_rows;
1972                 if (logo_shown >= 0)
1973                         goto redraw_down;
1974                 switch (p->scrollmode) {
1975                 case SCROLL_MOVE:
1976                         fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,
1977                                      -count);
1978                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1979                         scr_memsetw((unsigned short *) (vc->vc_origin +
1980                                                         vc->vc_size_row *
1981                                                         t),
1982                                     vc->vc_scrl_erase_char,
1983                                     vc->vc_size_row * count);
1984                         ret = 1;
1985                         break;
1986
1987                 case SCROLL_WRAP_MOVE:
1988                         if (b - t - count > 3 * vc->vc_rows >> 2) {
1989                                 if (vc->vc_rows - b > 0)
1990                                         fbcon_bmove(vc, b, 0, b - count, 0,
1991                                                     vc->vc_rows - b,
1992                                                     vc->vc_cols);
1993                                 ywrap_down(vc, count);
1994                                 if (t > 0)
1995                                         fbcon_bmove(vc, count, 0, 0, 0, t,
1996                                                     vc->vc_cols);
1997                         } else if (info->flags & FBINFO_READS_FAST)
1998                                 fbcon_bmove(vc, t, 0, t + count, 0,
1999                                             b - t - count, vc->vc_cols);
2000                         else
2001                                 goto redraw_down;
2002                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
2003                         break;
2004
2005                 case SCROLL_PAN_MOVE:
2006                         if ((count - p->yscroll <= p->vrows - vc->vc_rows)
2007                             && ((!scroll_partial && (b - t == vc->vc_rows))
2008                                 || (scroll_partial
2009                                     && (b - t - count >
2010                                         3 * vc->vc_rows >> 2)))) {
2011                                 if (vc->vc_rows - b > 0)
2012                                         fbcon_bmove(vc, b, 0, b - count, 0,
2013                                                     vc->vc_rows - b,
2014                                                     vc->vc_cols);
2015                                 ypan_down(vc, count);
2016                                 if (t > 0)
2017                                         fbcon_bmove(vc, count, 0, 0, 0, t,
2018                                                     vc->vc_cols);
2019                         } else if (info->flags & FBINFO_READS_FAST)
2020                                 fbcon_bmove(vc, t, 0, t + count, 0,
2021                                             b - t - count, vc->vc_cols);
2022                         else
2023                                 goto redraw_down;
2024                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
2025                         break;
2026
2027                 case SCROLL_PAN_REDRAW:
2028                         if ((count - p->yscroll <= p->vrows - vc->vc_rows)
2029                             && ((!scroll_partial && (b - t == vc->vc_rows))
2030                                 || (scroll_partial
2031                                     && (b - t - count >
2032                                         3 * vc->vc_rows >> 2)))) {
2033                                 if (vc->vc_rows - b > 0)
2034                                         fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
2035                                                           b - count);
2036                                 ypan_down_redraw(vc, t, count);
2037                                 if (t > 0)
2038                                         fbcon_redraw_move(vc, p, count, t, 0);
2039                         } else
2040                                 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
2041                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
2042                         break;
2043
2044                 case SCROLL_REDRAW:
2045                       redraw_down:
2046                         fbcon_redraw(vc, p, b - 1, b - t - count,
2047                                      -count * vc->vc_cols);
2048                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
2049                         scr_memsetw((unsigned short *) (vc->vc_origin +
2050                                                         vc->vc_size_row *
2051                                                         t),
2052                                     vc->vc_scrl_erase_char,
2053                                     vc->vc_size_row * count);
2054                         ret = 1;
2055                         break;
2056                 }
2057                 break;
2058         }
2059         vc->vc_video_erase_char = saved_ec;
2060         return ret;
2061 }
2062
2063
2064 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
2065                         int height, int width)
2066 {
2067         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2068         struct display *p = &fb_display[vc->vc_num];
2069
2070         if (fbcon_is_inactive(vc, info))
2071                 return;
2072
2073         if (!width || !height)
2074                 return;
2075
2076         /*  Split blits that cross physical y_wrap case.
2077          *  Pathological case involves 4 blits, better to use recursive
2078          *  code rather than unrolled case
2079          *
2080          *  Recursive invocations don't need to erase the cursor over and
2081          *  over again, so we use fbcon_bmove_rec()
2082          */
2083         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
2084                         p->vrows - p->yscroll);
2085 }
2086
2087 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
2088                             int dy, int dx, int height, int width, u_int y_break)
2089 {
2090         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2091         struct fbcon_ops *ops = info->fbcon_par;
2092         u_int b;
2093
2094         if (sy < y_break && sy + height > y_break) {
2095                 b = y_break - sy;
2096                 if (dy < sy) {  /* Avoid trashing self */
2097                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2098                                         y_break);
2099                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2100                                         height - b, width, y_break);
2101                 } else {
2102                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2103                                         height - b, width, y_break);
2104                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2105                                         y_break);
2106                 }
2107                 return;
2108         }
2109
2110         if (dy < y_break && dy + height > y_break) {
2111                 b = y_break - dy;
2112                 if (dy < sy) {  /* Avoid trashing self */
2113                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2114                                         y_break);
2115                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2116                                         height - b, width, y_break);
2117                 } else {
2118                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2119                                         height - b, width, y_break);
2120                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2121                                         y_break);
2122                 }
2123                 return;
2124         }
2125         ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
2126                    height, width);
2127 }
2128
2129 static __inline__ void updatescrollmode(struct display *p,
2130                                         struct fb_info *info,
2131                                         struct vc_data *vc)
2132 {
2133         struct fbcon_ops *ops = info->fbcon_par;
2134         int fh = vc->vc_font.height;
2135         int cap = info->flags;
2136         u16 t = 0;
2137         int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
2138                                   info->fix.xpanstep);
2139         int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
2140         int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2141         int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
2142                                    info->var.xres_virtual);
2143         int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
2144                 divides(ypan, vc->vc_font.height) && vyres > yres;
2145         int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
2146                 divides(ywrap, vc->vc_font.height) &&
2147                 divides(vc->vc_font.height, vyres) &&
2148                 divides(vc->vc_font.height, yres);
2149         int reading_fast = cap & FBINFO_READS_FAST;
2150         int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
2151                 !(cap & FBINFO_HWACCEL_DISABLED);
2152         int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
2153                 !(cap & FBINFO_HWACCEL_DISABLED);
2154
2155         p->vrows = vyres/fh;
2156         if (yres > (fh * (vc->vc_rows + 1)))
2157                 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2158         if ((yres % fh) && (vyres % fh < yres % fh))
2159                 p->vrows--;
2160
2161         if (good_wrap || good_pan) {
2162                 if (reading_fast || fast_copyarea)
2163                         p->scrollmode = good_wrap ?
2164                                 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
2165                 else
2166                         p->scrollmode = good_wrap ? SCROLL_REDRAW :
2167                                 SCROLL_PAN_REDRAW;
2168         } else {
2169                 if (reading_fast || (fast_copyarea && !fast_imageblit))
2170                         p->scrollmode = SCROLL_MOVE;
2171                 else
2172                         p->scrollmode = SCROLL_REDRAW;
2173         }
2174 }
2175
2176 static int fbcon_resize(struct vc_data *vc, unsigned int width,
2177                         unsigned int height, unsigned int user)
2178 {
2179         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2180         struct fbcon_ops *ops = info->fbcon_par;
2181         struct display *p = &fb_display[vc->vc_num];
2182         struct fb_var_screeninfo var = info->var;
2183         int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2184
2185         virt_w = FBCON_SWAP(ops->rotate, width, height);
2186         virt_h = FBCON_SWAP(ops->rotate, height, width);
2187         virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2188                                  vc->vc_font.height);
2189         virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2190                                  vc->vc_font.width);
2191         var.xres = virt_w * virt_fw;
2192         var.yres = virt_h * virt_fh;
2193         x_diff = info->var.xres - var.xres;
2194         y_diff = info->var.yres - var.yres;
2195         if (x_diff < 0 || x_diff > virt_fw ||
2196             y_diff < 0 || y_diff > virt_fh) {
2197                 const struct fb_videomode *mode;
2198
2199                 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2200                 mode = fb_find_best_mode(&var, &info->modelist);
2201                 if (mode == NULL)
2202                         return -EINVAL;
2203                 display_to_var(&var, p);
2204                 fb_videomode_to_var(&var, mode);
2205
2206                 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2207                         return -EINVAL;
2208
2209                 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2210                 if (CON_IS_VISIBLE(vc)) {
2211                         var.activate = FB_ACTIVATE_NOW |
2212                                 FB_ACTIVATE_FORCE;
2213                         fb_set_var(info, &var);
2214                 }
2215                 var_to_display(p, &info->var, info);
2216                 ops->var = info->var;
2217         }
2218         updatescrollmode(p, info, vc);
2219         return 0;
2220 }
2221
2222 static int fbcon_switch(struct vc_data *vc)
2223 {
2224         struct fb_info *info, *old_info = NULL;
2225         struct fbcon_ops *ops;
2226         struct display *p = &fb_display[vc->vc_num];
2227         struct fb_var_screeninfo var;
2228         int i, prev_console, charcnt = 256;
2229
2230         info = registered_fb[con2fb_map[vc->vc_num]];
2231         ops = info->fbcon_par;
2232
2233         if (softback_top) {
2234                 if (softback_lines)
2235                         fbcon_set_origin(vc);
2236                 softback_top = softback_curr = softback_in = softback_buf;
2237                 softback_lines = 0;
2238                 fbcon_update_softback(vc);
2239         }
2240
2241         if (logo_shown >= 0) {
2242                 struct vc_data *conp2 = vc_cons[logo_shown].d;
2243
2244                 if (conp2->vc_top == logo_lines
2245                     && conp2->vc_bottom == conp2->vc_rows)
2246                         conp2->vc_top = 0;
2247                 logo_shown = FBCON_LOGO_CANSHOW;
2248         }
2249
2250         prev_console = ops->currcon;
2251         if (prev_console != -1)
2252                 old_info = registered_fb[con2fb_map[prev_console]];
2253         /*
2254          * FIXME: If we have multiple fbdev's loaded, we need to
2255          * update all info->currcon.  Perhaps, we can place this
2256          * in a centralized structure, but this might break some
2257          * drivers.
2258          *
2259          * info->currcon = vc->vc_num;
2260          */
2261         for (i = 0; i < FB_MAX; i++) {
2262                 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
2263                         struct fbcon_ops *o = registered_fb[i]->fbcon_par;
2264
2265                         o->currcon = vc->vc_num;
2266                 }
2267         }
2268         memset(&var, 0, sizeof(struct fb_var_screeninfo));
2269         display_to_var(&var, p);
2270         var.activate = FB_ACTIVATE_NOW;
2271
2272         /*
2273          * make sure we don't unnecessarily trip the memcmp()
2274          * in fb_set_var()
2275          */
2276         info->var.activate = var.activate;
2277         var.vmode |= info->var.vmode & ~FB_VMODE_MASK;
2278         fb_set_var(info, &var);
2279         ops->var = info->var;
2280
2281         if (old_info != NULL && (old_info != info ||
2282                                  info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2283                 if (info->fbops->fb_set_par)
2284                         info->fbops->fb_set_par(info);
2285
2286                 if (old_info != info)
2287                         fbcon_del_cursor_timer(old_info);
2288         }
2289
2290         if (fbcon_is_inactive(vc, info) ||
2291             ops->blank_state != FB_BLANK_UNBLANK)
2292                 fbcon_del_cursor_timer(info);
2293         else
2294                 fbcon_add_cursor_timer(info);
2295
2296         set_blitting_type(vc, info);
2297         ops->cursor_reset = 1;
2298
2299         if (ops->rotate_font && ops->rotate_font(info, vc)) {
2300                 ops->rotate = FB_ROTATE_UR;
2301                 set_blitting_type(vc, info);
2302         }
2303
2304         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2305         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2306
2307         if (p->userfont)
2308                 charcnt = FNTCHARCNT(vc->vc_font.data);
2309
2310         if (charcnt > 256)
2311                 vc->vc_complement_mask <<= 1;
2312
2313         updatescrollmode(p, info, vc);
2314
2315         switch (p->scrollmode) {
2316         case SCROLL_WRAP_MOVE:
2317                 scrollback_phys_max = p->vrows - vc->vc_rows;
2318                 break;
2319         case SCROLL_PAN_MOVE:
2320         case SCROLL_PAN_REDRAW:
2321                 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2322                 if (scrollback_phys_max < 0)
2323                         scrollback_phys_max = 0;
2324                 break;
2325         default:
2326                 scrollback_phys_max = 0;
2327                 break;
2328         }
2329
2330         scrollback_max = 0;
2331         scrollback_current = 0;
2332
2333         if (!fbcon_is_inactive(vc, info)) {
2334             ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2335             ops->update_start(info);
2336         }
2337
2338         fbcon_set_palette(vc, color_table);
2339         fbcon_clear_margins(vc, 0);
2340
2341         if (logo_shown == FBCON_LOGO_DRAW) {
2342
2343                 logo_shown = fg_console;
2344                 /* This is protected above by initmem_freed */
2345                 fb_show_logo(info, ops->rotate);
2346                 update_region(vc,
2347                               vc->vc_origin + vc->vc_size_row * vc->vc_top,
2348                               vc->vc_size_row * (vc->vc_bottom -
2349                                                  vc->vc_top) / 2);
2350                 return 0;
2351         }
2352         return 1;
2353 }
2354
2355 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2356                                 int blank)
2357 {
2358         struct fb_event event;
2359
2360         if (blank) {
2361                 unsigned short charmask = vc->vc_hi_font_mask ?
2362                         0x1ff : 0xff;
2363                 unsigned short oldc;
2364
2365                 oldc = vc->vc_video_erase_char;
2366                 vc->vc_video_erase_char &= charmask;
2367                 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2368                 vc->vc_video_erase_char = oldc;
2369         }
2370
2371
2372         event.info = info;
2373         event.data = &blank;
2374         fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
2375 }
2376
2377 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2378 {
2379         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2380         struct fbcon_ops *ops = info->fbcon_par;
2381
2382         if (mode_switch) {
2383                 struct fb_var_screeninfo var = info->var;
2384
2385                 ops->graphics = 1;
2386
2387                 if (!blank) {
2388                         if (info->fbops->fb_save_state)
2389                                 info->fbops->fb_save_state(info);
2390                         var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2391                         fb_set_var(info, &var);
2392                         ops->graphics = 0;
2393                         ops->var = info->var;
2394                 } else if (info->fbops->fb_restore_state)
2395                         info->fbops->fb_restore_state(info);
2396         }
2397
2398         if (!fbcon_is_inactive(vc, info)) {
2399                 if (ops->blank_state != blank) {
2400                         ops->blank_state = blank;
2401                         fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2402                         ops->cursor_flash = (!blank);
2403
2404                         if (fb_blank(info, blank))
2405                                 fbcon_generic_blank(vc, info, blank);
2406                 }
2407
2408                 if (!blank)
2409                         update_screen(vc);
2410         }
2411
2412         if (mode_switch || fbcon_is_inactive(vc, info) ||
2413             ops->blank_state != FB_BLANK_UNBLANK)
2414                 fbcon_del_cursor_timer(info);
2415         else
2416                 fbcon_add_cursor_timer(info);
2417
2418         return 0;
2419 }
2420
2421 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2422 {
2423         u8 *fontdata = vc->vc_font.data;
2424         u8 *data = font->data;
2425         int i, j;
2426
2427         font->width = vc->vc_font.width;
2428         font->height = vc->vc_font.height;
2429         font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2430         if (!font->data)
2431                 return 0;
2432
2433         if (font->width <= 8) {
2434                 j = vc->vc_font.height;
2435                 for (i = 0; i < font->charcount; i++) {
2436                         memcpy(data, fontdata, j);
2437                         memset(data + j, 0, 32 - j);
2438                         data += 32;
2439                         fontdata += j;
2440                 }
2441         } else if (font->width <= 16) {
2442                 j = vc->vc_font.height * 2;
2443                 for (i = 0; i < font->charcount; i++) {
2444                         memcpy(data, fontdata, j);
2445                         memset(data + j, 0, 64 - j);
2446                         data += 64;
2447                         fontdata += j;
2448                 }
2449         } else if (font->width <= 24) {
2450                 for (i = 0; i < font->charcount; i++) {
2451                         for (j = 0; j < vc->vc_font.height; j++) {
2452                                 *data++ = fontdata[0];
2453                                 *data++ = fontdata[1];
2454                                 *data++ = fontdata[2];
2455                                 fontdata += sizeof(u32);
2456                         }
2457                         memset(data, 0, 3 * (32 - j));
2458                         data += 3 * (32 - j);
2459                 }
2460         } else {
2461                 j = vc->vc_font.height * 4;
2462                 for (i = 0; i < font->charcount; i++) {
2463                         memcpy(data, fontdata, j);
2464                         memset(data + j, 0, 128 - j);
2465                         data += 128;
2466                         fontdata += j;
2467                 }
2468         }
2469         return 0;
2470 }
2471
2472 static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2473                              const u8 * data, int userfont)
2474 {
2475         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2476         struct fbcon_ops *ops = info->fbcon_par;
2477         struct display *p = &fb_display[vc->vc_num];
2478         int resize;
2479         int cnt;
2480         char *old_data = NULL;
2481
2482         if (CON_IS_VISIBLE(vc) && softback_lines)
2483                 fbcon_set_origin(vc);
2484
2485         resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2486         if (p->userfont)
2487                 old_data = vc->vc_font.data;
2488         if (userfont)
2489                 cnt = FNTCHARCNT(data);
2490         else
2491                 cnt = 256;
2492         vc->vc_font.data = (void *)(p->fontdata = data);
2493         if ((p->userfont = userfont))
2494                 REFCOUNT(data)++;
2495         vc->vc_font.width = w;
2496         vc->vc_font.height = h;
2497         if (vc->vc_hi_font_mask && cnt == 256) {
2498                 vc->vc_hi_font_mask = 0;
2499                 if (vc->vc_can_do_color) {
2500                         vc->vc_complement_mask >>= 1;
2501                         vc->vc_s_complement_mask >>= 1;
2502                 }
2503
2504                 /* ++Edmund: reorder the attribute bits */
2505                 if (vc->vc_can_do_color) {
2506                         unsigned short *cp =
2507                             (unsigned short *) vc->vc_origin;
2508                         int count = vc->vc_screenbuf_size / 2;
2509                         unsigned short c;
2510                         for (; count > 0; count--, cp++) {
2511                                 c = scr_readw(cp);
2512                                 scr_writew(((c & 0xfe00) >> 1) |
2513                                            (c & 0xff), cp);
2514                         }
2515                         c = vc->vc_video_erase_char;
2516                         vc->vc_video_erase_char =
2517                             ((c & 0xfe00) >> 1) | (c & 0xff);
2518                         c = vc->vc_def_color;
2519                         vc->vc_scrl_erase_char =
2520                             ((c & 0xFE00) >> 1) | (c & 0xFF);
2521                         vc->vc_attr >>= 1;
2522                 }
2523         } else if (!vc->vc_hi_font_mask && cnt == 512) {
2524                 vc->vc_hi_font_mask = 0x100;
2525                 if (vc->vc_can_do_color) {
2526                         vc->vc_complement_mask <<= 1;
2527                         vc->vc_s_complement_mask <<= 1;
2528                 }
2529
2530                 /* ++Edmund: reorder the attribute bits */
2531                 {
2532                         unsigned short *cp =
2533                             (unsigned short *) vc->vc_origin;
2534                         int count = vc->vc_screenbuf_size / 2;
2535                         unsigned short c;
2536                         for (; count > 0; count--, cp++) {
2537                                 unsigned short newc;
2538                                 c = scr_readw(cp);
2539                                 if (vc->vc_can_do_color)
2540                                         newc =
2541                                             ((c & 0xff00) << 1) | (c &
2542                                                                    0xff);
2543                                 else
2544                                         newc = c & ~0x100;
2545                                 scr_writew(newc, cp);
2546                         }
2547                         c = vc->vc_video_erase_char;
2548                         if (vc->vc_can_do_color) {
2549                                 vc->vc_video_erase_char =
2550                                     ((c & 0xff00) << 1) | (c & 0xff);
2551                                 c = vc->vc_def_color;
2552                                 vc->vc_scrl_erase_char =
2553                                     ((c & 0xFF00) << 1) | (c & 0xFF);
2554                                 vc->vc_attr <<= 1;
2555                         } else {
2556                                 vc->vc_video_erase_char = c & ~0x100;
2557                                 vc->vc_scrl_erase_char = c & ~0x100;
2558                         }
2559                 }
2560
2561         }
2562
2563         if (resize) {
2564                 int cols, rows;
2565
2566                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2567                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2568                 cols /= w;
2569                 rows /= h;
2570                 vc_resize(vc, cols, rows);
2571                 if (CON_IS_VISIBLE(vc) && softback_buf)
2572                         fbcon_update_softback(vc);
2573         } else if (CON_IS_VISIBLE(vc)
2574                    && vc->vc_mode == KD_TEXT) {
2575                 fbcon_clear_margins(vc, 0);
2576                 update_screen(vc);
2577         }
2578
2579         if (old_data && (--REFCOUNT(old_data) == 0))
2580                 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2581         return 0;
2582 }
2583
2584 static int fbcon_copy_font(struct vc_data *vc, int con)
2585 {
2586         struct display *od = &fb_display[con];
2587         struct console_font *f = &vc->vc_font;
2588
2589         if (od->fontdata == f->data)
2590                 return 0;       /* already the same font... */
2591         return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2592 }
2593
2594 /*
2595  *  User asked to set font; we are guaranteed that
2596  *      a) width and height are in range 1..32
2597  *      b) charcount does not exceed 512
2598  *  but lets not assume that, since someone might someday want to use larger
2599  *  fonts. And charcount of 512 is small for unicode support.
2600  *
2601  *  However, user space gives the font in 32 rows , regardless of
2602  *  actual font height. So a new API is needed if support for larger fonts
2603  *  is ever implemented.
2604  */
2605
2606 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2607 {
2608         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2609         unsigned charcount = font->charcount;
2610         int w = font->width;
2611         int h = font->height;
2612         int size;
2613         int i, csum;
2614         u8 *new_data, *data = font->data;
2615         int pitch = (font->width+7) >> 3;
2616
2617         /* Is there a reason why fbconsole couldn't handle any charcount >256?
2618          * If not this check should be changed to charcount < 256 */
2619         if (charcount != 256 && charcount != 512)
2620                 return -EINVAL;
2621
2622         /* Make sure drawing engine can handle the font */
2623         if (!(info->pixmap.blit_x & (1 << (font->width - 1))) ||
2624             !(info->pixmap.blit_y & (1 << (font->height - 1))))
2625                 return -EINVAL;
2626
2627         /* Make sure driver can handle the font length */
2628         if (fbcon_invalid_charcount(info, charcount))
2629                 return -EINVAL;
2630
2631         size = h * pitch * charcount;
2632
2633         new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2634
2635         if (!new_data)
2636                 return -ENOMEM;
2637
2638         new_data += FONT_EXTRA_WORDS * sizeof(int);
2639         FNTSIZE(new_data) = size;
2640         FNTCHARCNT(new_data) = charcount;
2641         REFCOUNT(new_data) = 0; /* usage counter */
2642         for (i=0; i< charcount; i++) {
2643                 memcpy(new_data + i*h*pitch, data +  i*32*pitch, h*pitch);
2644         }
2645
2646         /* Since linux has a nice crc32 function use it for counting font
2647          * checksums. */
2648         csum = crc32(0, new_data, size);
2649
2650         FNTSUM(new_data) = csum;
2651         /* Check if the same font is on some other console already */
2652         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2653                 struct vc_data *tmp = vc_cons[i].d;
2654
2655                 if (fb_display[i].userfont &&
2656                     fb_display[i].fontdata &&
2657                     FNTSUM(fb_display[i].fontdata) == csum &&
2658                     FNTSIZE(fb_display[i].fontdata) == size &&
2659                     tmp->vc_font.width == w &&
2660                     !memcmp(fb_display[i].fontdata, new_data, size)) {
2661                         kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2662                         new_data = (u8 *)fb_display[i].fontdata;
2663                         break;
2664                 }
2665         }
2666         return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2667 }
2668
2669 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2670 {
2671         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2672         const struct font_desc *f;
2673
2674         if (!name)
2675                 f = get_default_font(info->var.xres, info->var.yres,
2676                                      info->pixmap.blit_x, info->pixmap.blit_y);
2677         else if (!(f = find_font(name)))
2678                 return -ENOENT;
2679
2680         font->width = f->width;
2681         font->height = f->height;
2682         return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2683 }
2684
2685 static u16 palette_red[16];
2686 static u16 palette_green[16];
2687 static u16 palette_blue[16];
2688
2689 static struct fb_cmap palette_cmap = {
2690         0, 16, palette_red, palette_green, palette_blue, NULL
2691 };
2692
2693 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
2694 {
2695         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2696         int i, j, k, depth;
2697         u8 val;
2698
2699         if (fbcon_is_inactive(vc, info))
2700                 return -EINVAL;
2701
2702         if (!CON_IS_VISIBLE(vc))
2703                 return 0;
2704
2705         depth = fb_get_color_depth(&info->var, &info->fix);
2706         if (depth > 3) {
2707                 for (i = j = 0; i < 16; i++) {
2708                         k = table[i];
2709                         val = vc->vc_palette[j++];
2710                         palette_red[k] = (val << 8) | val;
2711                         val = vc->vc_palette[j++];
2712                         palette_green[k] = (val << 8) | val;
2713                         val = vc->vc_palette[j++];
2714                         palette_blue[k] = (val << 8) | val;
2715                 }
2716                 palette_cmap.len = 16;
2717                 palette_cmap.start = 0;
2718         /*
2719          * If framebuffer is capable of less than 16 colors,
2720          * use default palette of fbcon.
2721          */
2722         } else
2723                 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2724
2725         return fb_set_cmap(&palette_cmap, info);
2726 }
2727
2728 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2729 {
2730         unsigned long p;
2731         int line;
2732
2733         if (vc->vc_num != fg_console || !softback_lines)
2734                 return (u16 *) (vc->vc_origin + offset);
2735         line = offset / vc->vc_size_row;
2736         if (line >= softback_lines)
2737                 return (u16 *) (vc->vc_origin + offset -
2738                                 softback_lines * vc->vc_size_row);
2739         p = softback_curr + offset;
2740         if (p >= softback_end)
2741                 p += softback_buf - softback_end;
2742         return (u16 *) p;
2743 }
2744
2745 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2746                                  int *px, int *py)
2747 {
2748         unsigned long ret;
2749         int x, y;
2750
2751         if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2752                 unsigned long offset = (pos - vc->vc_origin) / 2;
2753
2754                 x = offset % vc->vc_cols;
2755                 y = offset / vc->vc_cols;
2756                 if (vc->vc_num == fg_console)
2757                         y += softback_lines;
2758                 ret = pos + (vc->vc_cols - x) * 2;
2759         } else if (vc->vc_num == fg_console && softback_lines) {
2760                 unsigned long offset = pos - softback_curr;
2761
2762                 if (pos < softback_curr)
2763                         offset += softback_end - softback_buf;
2764                 offset /= 2;
2765                 x = offset % vc->vc_cols;
2766                 y = offset / vc->vc_cols;
2767                 ret = pos + (vc->vc_cols - x) * 2;
2768                 if (ret == softback_end)
2769                         ret = softback_buf;
2770                 if (ret == softback_in)
2771                         ret = vc->vc_origin;
2772         } else {
2773                 /* Should not happen */
2774                 x = y = 0;
2775                 ret = vc->vc_origin;
2776         }
2777         if (px)
2778                 *px = x;
2779         if (py)
2780                 *py = y;
2781         return ret;
2782 }
2783
2784 /* As we might be inside of softback, we may work with non-contiguous buffer,
2785    that's why we have to use a separate routine. */
2786 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2787 {
2788         while (cnt--) {
2789                 u16 a = scr_readw(p);
2790                 if (!vc->vc_can_do_color)
2791                         a ^= 0x0800;
2792                 else if (vc->vc_hi_font_mask == 0x100)
2793                         a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2794                             (((a) & 0x0e00) << 4);
2795                 else
2796                         a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2797                             (((a) & 0x0700) << 4);
2798                 scr_writew(a, p++);
2799                 if (p == (u16 *) softback_end)
2800                         p = (u16 *) softback_buf;
2801                 if (p == (u16 *) softback_in)
2802                         p = (u16 *) vc->vc_origin;
2803         }
2804 }
2805
2806 static int fbcon_scrolldelta(struct vc_data *vc, int lines)
2807 {
2808         struct fb_info *info = registered_fb[con2fb_map[fg_console]];
2809         struct fbcon_ops *ops = info->fbcon_par;
2810         struct display *disp = &fb_display[fg_console];
2811         int offset, limit, scrollback_old;
2812
2813         if (softback_top) {
2814                 if (vc->vc_num != fg_console)
2815                         return 0;
2816                 if (vc->vc_mode != KD_TEXT || !lines)
2817                         return 0;
2818                 if (logo_shown >= 0) {
2819                         struct vc_data *conp2 = vc_cons[logo_shown].d;
2820
2821                         if (conp2->vc_top == logo_lines
2822                             && conp2->vc_bottom == conp2->vc_rows)
2823                                 conp2->vc_top = 0;
2824                         if (logo_shown == vc->vc_num) {
2825                                 unsigned long p, q;
2826                                 int i;
2827
2828                                 p = softback_in;
2829                                 q = vc->vc_origin +
2830                                     logo_lines * vc->vc_size_row;
2831                                 for (i = 0; i < logo_lines; i++) {
2832                                         if (p == softback_top)
2833                                                 break;
2834                                         if (p == softback_buf)
2835                                                 p = softback_end;
2836                                         p -= vc->vc_size_row;
2837                                         q -= vc->vc_size_row;
2838                                         scr_memcpyw((u16 *) q, (u16 *) p,
2839                                                     vc->vc_size_row);
2840                                 }
2841                                 softback_in = softback_curr = p;
2842                                 update_region(vc, vc->vc_origin,
2843                                               logo_lines * vc->vc_cols);
2844                         }
2845                         logo_shown = FBCON_LOGO_CANSHOW;
2846                 }
2847                 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2848                 fbcon_redraw_softback(vc, disp, lines);
2849                 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2850                 return 0;
2851         }
2852
2853         if (!scrollback_phys_max)
2854                 return -ENOSYS;
2855
2856         scrollback_old = scrollback_current;
2857         scrollback_current -= lines;
2858         if (scrollback_current < 0)
2859                 scrollback_current = 0;
2860         else if (scrollback_current > scrollback_max)
2861                 scrollback_current = scrollback_max;
2862         if (scrollback_current == scrollback_old)
2863                 return 0;
2864
2865         if (fbcon_is_inactive(vc, info))
2866                 return 0;
2867
2868         fbcon_cursor(vc, CM_ERASE);
2869
2870         offset = disp->yscroll - scrollback_current;
2871         limit = disp->vrows;
2872         switch (disp->scrollmode) {
2873         case SCROLL_WRAP_MOVE:
2874                 info->var.vmode |= FB_VMODE_YWRAP;
2875                 break;
2876         case SCROLL_PAN_MOVE:
2877         case SCROLL_PAN_REDRAW:
2878                 limit -= vc->vc_rows;
2879                 info->var.vmode &= ~FB_VMODE_YWRAP;
2880                 break;
2881         }
2882         if (offset < 0)
2883                 offset += limit;
2884         else if (offset >= limit)
2885                 offset -= limit;
2886
2887         ops->var.xoffset = 0;
2888         ops->var.yoffset = offset * vc->vc_font.height;
2889         ops->update_start(info);
2890
2891         if (!scrollback_current)
2892                 fbcon_cursor(vc, CM_DRAW);
2893         return 0;
2894 }
2895
2896 static int fbcon_set_origin(struct vc_data *vc)
2897 {
2898         if (softback_lines)
2899                 fbcon_scrolldelta(vc, softback_lines);
2900         return 0;
2901 }
2902
2903 static void fbcon_suspended(struct fb_info *info)
2904 {
2905         struct vc_data *vc = NULL;
2906         struct fbcon_ops *ops = info->fbcon_par;
2907
2908         if (!ops || ops->currcon < 0)
2909                 return;
2910         vc = vc_cons[ops->currcon].d;
2911
2912         /* Clear cursor, restore saved data */
2913         fbcon_cursor(vc, CM_ERASE);
2914 }
2915
2916 static void fbcon_resumed(struct fb_info *info)
2917 {
2918         struct vc_data *vc;
2919         struct fbcon_ops *ops = info->fbcon_par;
2920
2921         if (!ops || ops->currcon < 0)
2922                 return;
2923         vc = vc_cons[ops->currcon].d;
2924
2925         update_screen(vc);
2926 }
2927
2928 static void fbcon_modechanged(struct fb_info *info)
2929 {
2930         struct fbcon_ops *ops = info->fbcon_par;
2931         struct vc_data *vc;
2932         struct display *p;
2933         int rows, cols;
2934
2935         if (!ops || ops->currcon < 0)
2936                 return;
2937         vc = vc_cons[ops->currcon].d;
2938         if (vc->vc_mode != KD_TEXT ||
2939             registered_fb[con2fb_map[ops->currcon]] != info)
2940                 return;
2941
2942         p = &fb_display[vc->vc_num];
2943         set_blitting_type(vc, info);
2944
2945         if (CON_IS_VISIBLE(vc)) {
2946                 var_to_display(p, &info->var, info);
2947                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2948                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2949                 cols /= vc->vc_font.width;
2950                 rows /= vc->vc_font.height;
2951                 vc_resize(vc, cols, rows);
2952                 updatescrollmode(p, info, vc);
2953                 scrollback_max = 0;
2954                 scrollback_current = 0;
2955
2956                 if (!fbcon_is_inactive(vc, info)) {
2957                     ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2958                     ops->update_start(info);
2959                 }
2960
2961                 fbcon_set_palette(vc, color_table);
2962                 update_screen(vc);
2963                 if (softback_buf)
2964                         fbcon_update_softback(vc);
2965         }
2966 }
2967
2968 static void fbcon_set_all_vcs(struct fb_info *info)
2969 {
2970         struct fbcon_ops *ops = info->fbcon_par;
2971         struct vc_data *vc;
2972         struct display *p;
2973         int i, rows, cols, fg = -1;
2974
2975         if (!ops || ops->currcon < 0)
2976                 return;
2977
2978         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2979                 vc = vc_cons[i].d;
2980                 if (!vc || vc->vc_mode != KD_TEXT ||
2981                     registered_fb[con2fb_map[i]] != info)
2982                         continue;
2983
2984                 if (CON_IS_VISIBLE(vc)) {
2985                         fg = i;
2986                         continue;
2987                 }
2988
2989                 p = &fb_display[vc->vc_num];
2990                 set_blitting_type(vc, info);
2991                 var_to_display(p, &info->var, info);
2992                 cols = FBCON_SWAP(p->rotate, info->var.xres, info->var.yres);
2993                 rows = FBCON_SWAP(p->rotate, info->var.yres, info->var.xres);
2994                 cols /= vc->vc_font.width;
2995                 rows /= vc->vc_font.height;
2996                 vc_resize(vc, cols, rows);
2997         }
2998
2999         if (fg != -1)
3000                 fbcon_modechanged(info);
3001 }
3002
3003 static int fbcon_mode_deleted(struct fb_info *info,
3004                               struct fb_videomode *mode)
3005 {
3006         struct fb_info *fb_info;
3007         struct display *p;
3008         int i, j, found = 0;
3009
3010         /* before deletion, ensure that mode is not in use */
3011         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3012                 j = con2fb_map[i];
3013                 if (j == -1)
3014                         continue;
3015                 fb_info = registered_fb[j];
3016                 if (fb_info != info)
3017                         continue;
3018                 p = &fb_display[i];
3019                 if (!p || !p->mode)
3020                         continue;
3021                 if (fb_mode_is_equal(p->mode, mode)) {
3022                         found = 1;
3023                         break;
3024                 }
3025         }
3026         return found;
3027 }
3028
3029 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
3030 static int fbcon_unbind(void)
3031 {
3032         int ret;
3033
3034         ret = unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
3035                                 fbcon_is_default);
3036         return ret;
3037 }
3038 #else
3039 static inline int fbcon_unbind(void)
3040 {
3041         return -EINVAL;
3042 }
3043 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3044
3045 static int fbcon_fb_unbind(int idx)
3046 {
3047         int i, new_idx = -1, ret = 0;
3048
3049         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3050                 if (con2fb_map[i] != idx &&
3051                     con2fb_map[i] != -1) {
3052                         new_idx = i;
3053                         break;
3054                 }
3055         }
3056
3057         if (new_idx != -1) {
3058                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3059                         if (con2fb_map[i] == idx)
3060                                 set_con2fb_map(i, new_idx, 0);
3061                 }
3062         } else
3063                 ret = fbcon_unbind();
3064
3065         return ret;
3066 }
3067
3068 static int fbcon_fb_unregistered(struct fb_info *info)
3069 {
3070         int i, idx = info->node;
3071
3072         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3073                 if (con2fb_map[i] == idx)
3074                         con2fb_map[i] = -1;
3075         }
3076
3077         if (idx == info_idx) {
3078                 info_idx = -1;
3079
3080                 for (i = 0; i < FB_MAX; i++) {
3081                         if (registered_fb[i] != NULL) {
3082                                 info_idx = i;
3083                                 break;
3084                         }
3085                 }
3086         }
3087
3088         if (info_idx != -1) {
3089                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3090                         if (con2fb_map[i] == -1)
3091                                 con2fb_map[i] = info_idx;
3092                 }
3093         }
3094
3095         if (!num_registered_fb)
3096                 unregister_con_driver(&fb_con);
3097
3098
3099         if (primary_device == idx)
3100                 primary_device = -1;
3101
3102         return 0;
3103 }
3104
3105 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
3106 static void fbcon_select_primary(struct fb_info *info)
3107 {
3108         if (!map_override && primary_device == -1 &&
3109             fb_is_primary_device(info)) {
3110                 int i;
3111
3112                 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n",
3113                        info->fix.id, info->node);
3114                 primary_device = info->node;
3115
3116                 for (i = first_fb_vc; i <= last_fb_vc; i++)
3117                         con2fb_map_boot[i] = primary_device;
3118
3119                 if (con_is_bound(&fb_con)) {
3120                         printk(KERN_INFO "fbcon: Remapping primary device, "
3121                                "fb%i, to tty %i-%i\n", info->node,
3122                                first_fb_vc + 1, last_fb_vc + 1);
3123                         info_idx = primary_device;
3124                 }
3125         }
3126
3127 }
3128 #else
3129 static inline void fbcon_select_primary(struct fb_info *info)
3130 {
3131         return;
3132 }
3133 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
3134
3135 static int fbcon_fb_registered(struct fb_info *info)
3136 {
3137         int ret = 0, i, idx = info->node;
3138
3139         fbcon_select_primary(info);
3140
3141         if (info_idx == -1) {
3142                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3143                         if (con2fb_map_boot[i] == idx) {
3144                                 info_idx = idx;
3145                                 break;
3146                         }
3147                 }
3148
3149                 if (info_idx != -1)
3150                         ret = fbcon_takeover(1);
3151         } else {
3152                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3153                         if (con2fb_map_boot[i] == idx)
3154                                 set_con2fb_map(i, idx, 0);
3155                 }
3156         }
3157
3158         return ret;
3159 }
3160
3161 static void fbcon_fb_blanked(struct fb_info *info, int blank)
3162 {
3163         struct fbcon_ops *ops = info->fbcon_par;
3164         struct vc_data *vc;
3165
3166         if (!ops || ops->currcon < 0)
3167                 return;
3168
3169         vc = vc_cons[ops->currcon].d;
3170         if (vc->vc_mode != KD_TEXT ||
3171                         registered_fb[con2fb_map[ops->currcon]] != info)
3172                 return;
3173
3174         if (CON_IS_VISIBLE(vc)) {
3175                 if (blank)
3176                         do_blank_screen(0);
3177                 else
3178                         do_unblank_screen(0);
3179         }
3180         ops->blank_state = blank;
3181 }
3182
3183 static void fbcon_new_modelist(struct fb_info *info)
3184 {
3185         int i;
3186         struct vc_data *vc;
3187         struct fb_var_screeninfo var;
3188         const struct fb_videomode *mode;
3189
3190         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3191                 if (registered_fb[con2fb_map[i]] != info)
3192                         continue;
3193                 if (!fb_display[i].mode)
3194                         continue;
3195                 vc = vc_cons[i].d;
3196                 display_to_var(&var, &fb_display[i]);
3197                 mode = fb_find_nearest_mode(fb_display[i].mode,
3198                                             &info->modelist);
3199                 fb_videomode_to_var(&var, mode);
3200                 fbcon_set_disp(info, &var, vc->vc_num);
3201         }
3202 }
3203
3204 static void fbcon_get_requirement(struct fb_info *info,
3205                                   struct fb_blit_caps *caps)
3206 {
3207         struct vc_data *vc;
3208         struct display *p;
3209
3210         if (caps->flags) {
3211                 int i, charcnt;
3212
3213                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3214                         vc = vc_cons[i].d;
3215                         if (vc && vc->vc_mode == KD_TEXT &&
3216                             info->node == con2fb_map[i]) {
3217                                 p = &fb_display[i];
3218                                 caps->x |= 1 << (vc->vc_font.width - 1);
3219                                 caps->y |= 1 << (vc->vc_font.height - 1);
3220                                 charcnt = (p->userfont) ?
3221                                         FNTCHARCNT(p->fontdata) : 256;
3222                                 if (caps->len < charcnt)
3223                                         caps->len = charcnt;
3224                         }
3225                 }
3226         } else {
3227                 vc = vc_cons[fg_console].d;
3228
3229                 if (vc && vc->vc_mode == KD_TEXT &&
3230                     info->node == con2fb_map[fg_console]) {
3231                         p = &fb_display[fg_console];
3232                         caps->x = 1 << (vc->vc_font.width - 1);
3233                         caps->y = 1 << (vc->vc_font.height - 1);
3234                         caps->len = (p->userfont) ?
3235                                 FNTCHARCNT(p->fontdata) : 256;
3236                 }
3237         }
3238 }
3239
3240 static int fbcon_event_notify(struct notifier_block *self,
3241                               unsigned long action, void *data)
3242 {
3243         struct fb_event *event = data;
3244         struct fb_info *info = event->info;
3245         struct fb_videomode *mode;
3246         struct fb_con2fbmap *con2fb;
3247         struct fb_blit_caps *caps;
3248         int ret = 0;
3249
3250         /*
3251          * ignore all events except driver registration and deregistration
3252          * if fbcon is not active
3253          */
3254         if (fbcon_has_exited && !(action == FB_EVENT_FB_REGISTERED ||
3255                                   action == FB_EVENT_FB_UNREGISTERED))
3256                 goto done;
3257
3258         switch(action) {
3259         case FB_EVENT_SUSPEND:
3260                 fbcon_suspended(info);
3261                 break;
3262         case FB_EVENT_RESUME:
3263                 fbcon_resumed(info);
3264                 break;
3265         case FB_EVENT_MODE_CHANGE:
3266                 fbcon_modechanged(info);
3267                 break;
3268         case FB_EVENT_MODE_CHANGE_ALL:
3269                 fbcon_set_all_vcs(info);
3270                 break;
3271         case FB_EVENT_MODE_DELETE:
3272                 mode = event->data;
3273                 ret = fbcon_mode_deleted(info, mode);
3274                 break;
3275         case FB_EVENT_FB_UNBIND:
3276                 ret = fbcon_fb_unbind(info->node);
3277                 break;
3278         case FB_EVENT_FB_REGISTERED:
3279                 ret = fbcon_fb_registered(info);
3280                 break;
3281         case FB_EVENT_FB_UNREGISTERED:
3282                 ret = fbcon_fb_unregistered(info);
3283                 break;
3284         case FB_EVENT_SET_CONSOLE_MAP:
3285                 con2fb = event->data;
3286                 ret = set_con2fb_map(con2fb->console - 1,
3287                                      con2fb->framebuffer, 1);
3288                 break;
3289         case FB_EVENT_GET_CONSOLE_MAP:
3290                 con2fb = event->data;
3291                 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
3292                 break;
3293         case FB_EVENT_BLANK:
3294                 fbcon_fb_blanked(info, *(int *)event->data);
3295                 break;
3296         case FB_EVENT_NEW_MODELIST:
3297                 fbcon_new_modelist(info);
3298                 break;
3299         case FB_EVENT_GET_REQ:
3300                 caps = event->data;
3301                 fbcon_get_requirement(info, caps);
3302                 break;
3303         }
3304
3305 done:
3306         return ret;
3307 }
3308
3309 /*
3310  *  The console `switch' structure for the frame buffer based console
3311  */
3312
3313 static const struct consw fb_con = {
3314         .owner                  = THIS_MODULE,
3315         .con_startup            = fbcon_startup,
3316         .con_init               = fbcon_init,
3317         .con_deinit             = fbcon_deinit,
3318         .con_clear              = fbcon_clear,
3319         .con_putc               = fbcon_putc,
3320         .con_putcs              = fbcon_putcs,
3321         .con_cursor             = fbcon_cursor,
3322         .con_scroll             = fbcon_scroll,
3323         .con_bmove              = fbcon_bmove,
3324         .con_switch             = fbcon_switch,
3325         .con_blank              = fbcon_blank,
3326         .con_font_set           = fbcon_set_font,
3327         .con_font_get           = fbcon_get_font,
3328         .con_font_default       = fbcon_set_def_font,
3329         .con_font_copy          = fbcon_copy_font,
3330         .con_set_palette        = fbcon_set_palette,
3331         .con_scrolldelta        = fbcon_scrolldelta,
3332         .con_set_origin         = fbcon_set_origin,
3333         .con_invert_region      = fbcon_invert_region,
3334         .con_screen_pos         = fbcon_screen_pos,
3335         .con_getxy              = fbcon_getxy,
3336         .con_resize             = fbcon_resize,
3337 };
3338
3339 static struct notifier_block fbcon_event_notifier = {
3340         .notifier_call  = fbcon_event_notify,
3341 };
3342
3343 static ssize_t store_rotate(struct device *device,
3344                             struct device_attribute *attr, const char *buf,
3345                             size_t count)
3346 {
3347         struct fb_info *info;
3348         int rotate, idx;
3349         char **last = NULL;
3350
3351         if (fbcon_has_exited)
3352                 return count;
3353
3354         acquire_console_sem();
3355         idx = con2fb_map[fg_console];
3356
3357         if (idx == -1 || registered_fb[idx] == NULL)
3358                 goto err;
3359
3360         info = registered_fb[idx];
3361         rotate = simple_strtoul(buf, last, 0);
3362         fbcon_rotate(info, rotate);
3363 err:
3364         release_console_sem();
3365         return count;
3366 }
3367
3368 static ssize_t store_rotate_all(struct device *device,
3369                                 struct device_attribute *attr,const char *buf,
3370                                 size_t count)
3371 {
3372         struct fb_info *info;
3373         int rotate, idx;
3374         char **last = NULL;
3375
3376         if (fbcon_has_exited)
3377                 return count;
3378
3379         acquire_console_sem();
3380         idx = con2fb_map[fg_console];
3381
3382         if (idx == -1 || registered_fb[idx] == NULL)
3383                 goto err;
3384
3385         info = registered_fb[idx];
3386         rotate = simple_strtoul(buf, last, 0);
3387         fbcon_rotate_all(info, rotate);
3388 err:
3389         release_console_sem();
3390         return count;
3391 }
3392
3393 static ssize_t show_rotate(struct device *device,
3394                            struct device_attribute *attr,char *buf)
3395 {
3396         struct fb_info *info;
3397         int rotate = 0, idx;
3398
3399         if (fbcon_has_exited)
3400                 return 0;
3401
3402         acquire_console_sem();
3403         idx = con2fb_map[fg_console];
3404
3405         if (idx == -1 || registered_fb[idx] == NULL)
3406                 goto err;
3407
3408         info = registered_fb[idx];
3409         rotate = fbcon_get_rotate(info);
3410 err:
3411         release_console_sem();
3412         return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3413 }
3414
3415 static ssize_t show_cursor_blink(struct device *device,
3416                                  struct device_attribute *attr, char *buf)
3417 {
3418         struct fb_info *info;
3419         struct fbcon_ops *ops;
3420         int idx, blink = -1;
3421
3422         if (fbcon_has_exited)
3423                 return 0;
3424
3425         acquire_console_sem();
3426         idx = con2fb_map[fg_console];
3427
3428         if (idx == -1 || registered_fb[idx] == NULL)
3429                 goto err;
3430
3431         info = registered_fb[idx];
3432         ops = info->fbcon_par;
3433
3434         if (!ops)
3435                 goto err;
3436
3437         blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0;
3438 err:
3439         release_console_sem();
3440         return snprintf(buf, PAGE_SIZE, "%d\n", blink);
3441 }
3442
3443 static ssize_t store_cursor_blink(struct device *device,
3444                                   struct device_attribute *attr,
3445                                   const char *buf, size_t count)
3446 {
3447         struct fb_info *info;
3448         int blink, idx;
3449         char **last = NULL;
3450
3451         if (fbcon_has_exited)
3452                 return count;
3453
3454         acquire_console_sem();
3455         idx = con2fb_map[fg_console];
3456
3457         if (idx == -1 || registered_fb[idx] == NULL)
3458                 goto err;
3459
3460         info = registered_fb[idx];
3461
3462         if (!info->fbcon_par)
3463                 goto err;
3464
3465         blink = simple_strtoul(buf, last, 0);
3466
3467         if (blink) {
3468                 fbcon_cursor_noblink = 0;
3469                 fbcon_add_cursor_timer(info);
3470         } else {
3471                 fbcon_cursor_noblink = 1;
3472                 fbcon_del_cursor_timer(info);
3473         }
3474
3475 err:
3476         release_console_sem();
3477         return count;
3478 }
3479
3480 static struct device_attribute device_attrs[] = {
3481         __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3482         __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3483         __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink,
3484                store_cursor_blink),
3485 };
3486
3487 static int fbcon_init_device(void)
3488 {
3489         int i, error = 0;
3490
3491         fbcon_has_sysfs = 1;
3492
3493         for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3494                 error = device_create_file(fbcon_device, &device_attrs[i]);
3495
3496                 if (error)
3497                         break;
3498         }
3499
3500         if (error) {
3501                 while (--i >= 0)
3502                         device_remove_file(fbcon_device, &device_attrs[i]);
3503
3504                 fbcon_has_sysfs = 0;
3505         }
3506
3507         return 0;
3508 }
3509
3510 static void fbcon_start(void)
3511 {
3512         if (num_registered_fb) {
3513                 int i;
3514
3515                 acquire_console_sem();
3516
3517                 for (i = 0; i < FB_MAX; i++) {
3518                         if (registered_fb[i] != NULL) {
3519                                 info_idx = i;
3520                                 break;
3521                         }
3522                 }
3523
3524                 release_console_sem();
3525                 fbcon_takeover(0);
3526         }
3527 }
3528
3529 static void fbcon_exit(void)
3530 {
3531         struct fb_info *info;
3532         int i, j, mapped;
3533
3534         if (fbcon_has_exited)
3535                 return;
3536
3537 #ifdef CONFIG_ATARI
3538         free_irq(IRQ_AUTO_4, fb_vbl_handler);
3539 #endif
3540 #ifdef CONFIG_MAC
3541         if (MACH_IS_MAC && vbl_detected)
3542                 free_irq(IRQ_MAC_VBL, fb_vbl_handler);
3543 #endif
3544
3545         kfree((void *)softback_buf);
3546         softback_buf = 0UL;
3547
3548         for (i = 0; i < FB_MAX; i++) {
3549                 mapped = 0;
3550                 info = registered_fb[i];
3551
3552                 if (info == NULL)
3553                         continue;
3554
3555                 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3556                         if (con2fb_map[j] == i)
3557                                 mapped = 1;
3558                 }
3559
3560                 if (mapped) {
3561                         if (info->fbops->fb_release)
3562                                 info->fbops->fb_release(info, 0);
3563                         module_put(info->fbops->owner);
3564
3565                         if (info->fbcon_par) {
3566                                 struct fbcon_ops *ops = info->fbcon_par;
3567
3568                                 fbcon_del_cursor_timer(info);
3569                                 kfree(ops->cursor_src);
3570                                 kfree(info->fbcon_par);
3571                                 info->fbcon_par = NULL;
3572                         }
3573
3574                         if (info->queue.func == fb_flashcursor)
3575                                 info->queue.func = NULL;
3576                 }
3577         }
3578
3579         fbcon_has_exited = 1;
3580 }
3581
3582 static int __init fb_console_init(void)
3583 {
3584         int i;
3585
3586         acquire_console_sem();
3587         fb_register_client(&fbcon_event_notifier);
3588         fbcon_device = device_create_drvdata(fb_class, NULL, MKDEV(0, 0),
3589                                              NULL, "fbcon");
3590
3591         if (IS_ERR(fbcon_device)) {
3592                 printk(KERN_WARNING "Unable to create device "
3593                        "for fbcon; errno = %ld\n",
3594                        PTR_ERR(fbcon_device));
3595                 fbcon_device = NULL;
3596         } else
3597                 fbcon_init_device();
3598
3599         for (i = 0; i < MAX_NR_CONSOLES; i++)
3600                 con2fb_map[i] = -1;
3601
3602         release_console_sem();
3603         fbcon_start();
3604         return 0;
3605 }
3606
3607 module_init(fb_console_init);
3608
3609 #ifdef MODULE
3610
3611 static void __exit fbcon_deinit_device(void)
3612 {
3613         int i;
3614
3615         if (fbcon_has_sysfs) {
3616                 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3617                         device_remove_file(fbcon_device, &device_attrs[i]);
3618
3619                 fbcon_has_sysfs = 0;
3620         }
3621 }
3622
3623 static void __exit fb_console_exit(void)
3624 {
3625         acquire_console_sem();
3626         fb_unregister_client(&fbcon_event_notifier);
3627         fbcon_deinit_device();
3628         device_destroy(fb_class, MKDEV(0, 0));
3629         fbcon_exit();
3630         release_console_sem();
3631         unregister_con_driver(&fb_con);
3632 }
3633
3634 module_exit(fb_console_exit);
3635
3636 #endif
3637
3638 MODULE_LICENSE("GPL");