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/sched.h>
  64 #include <linux/fs.h>
  65 #include <linux/kernel.h>
  66 #include <linux/delay.h>        /* MSch: for IRQ probe */
  67 #include <linux/console.h>
  68 #include <linux/string.h>
  69 #include <linux/kd.h>
  70 #include <linux/slab.h>
  71 #include <linux/fb.h>
  72 #include <linux/vt_kern.h>
  73 #include <linux/selection.h>
  74 #include <linux/font.h>
  75 #include <linux/smp.h>
  76 #include <linux/init.h>
  77 #include <linux/interrupt.h>
  78 #include <linux/crc32.h> /* For counting font checksums */
  79 #include <asm/irq.h>
  80 #include <asm/system.h>
  81 #include <asm/uaccess.h>
  82 #ifdef CONFIG_ATARI
  83 #include <asm/atariints.h>
  84 #endif
  85 #ifdef CONFIG_MAC
  86 #include <asm/macints.h>
  87 #endif
  88 #if defined(__mc68000__) || defined(CONFIG_APUS)
  89 #include <asm/machdep.h>
  90 #include <asm/setup.h>
  91 #endif
  92
  93 #include "fbcon.h"
  94
  95 #ifdef FBCONDEBUG
  96 #  define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __FUNCTION__ , ## args)
  97 #else
  98 #  define DPRINTK(fmt, args...)
  99 #endif
 100
 101 enum {
 102         FBCON_LOGO_CANSHOW      = -1,   /* the logo can be shown */
 103         FBCON_LOGO_DRAW         = -2,   /* draw the logo to a console */
 104         FBCON_LOGO_DONTSHOW     = -3    /* do not show the logo */
 105 };
 106
 107 static struct display fb_display[MAX_NR_CONSOLES];
 108
 109 static signed char con2fb_map[MAX_NR_CONSOLES];
 110 static signed char con2fb_map_boot[MAX_NR_CONSOLES];
 111 static int logo_height;
 112 static int logo_lines;
 113 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
 114    enums.  */
 115 static int logo_shown = FBCON_LOGO_CANSHOW;
 116 /* Software scrollback */
 117 static int fbcon_softback_size = 32768;
 118 static unsigned long softback_buf, softback_curr;
 119 static unsigned long softback_in;
 120 static unsigned long softback_top, softback_end;
 121 static int softback_lines;
 122 /* console mappings */
 123 static int first_fb_vc;
 124 static int last_fb_vc = MAX_NR_CONSOLES - 1;
 125 static int fbcon_is_default = 1;
 126 static int fbcon_has_exited;
 127
 128 /* font data */
 129 static char fontname[40];
 130
 131 /* current fb_info */
 132 static int info_idx = -1;
 133
 134 /* console rotation */
 135 static int rotate;
 136
 137 static const struct consw fb_con;
 138
 139 #define CM_SOFTBACK     (8)
 140
 141 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
 142
 143 static int fbcon_set_origin(struct vc_data *);
 144
 145 #define CURSOR_DRAW_DELAY               (1)
 146
 147 /* # VBL ints between cursor state changes */
 148 #define ATARI_CURSOR_BLINK_RATE         (42)
 149 #define MAC_CURSOR_BLINK_RATE           (32)
 150 #define DEFAULT_CURSOR_BLINK_RATE       (20)
 151
 152 static int vbl_cursor_cnt;
 153
 154 #define divides(a, b)   ((!(a) || (b)%(a)) ? 0 : 1)
 155
 156 /*
 157  *  Interface used by the world
 158  */
 159
 160 static const char *fbcon_startup(void);
 161 static void fbcon_init(struct vc_data *vc, int init);
 162 static void fbcon_deinit(struct vc_data *vc);
 163 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
 164                         int width);
 165 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
 166 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
 167                         int count, int ypos, int xpos);
 168 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
 169 static void fbcon_cursor(struct vc_data *vc, int mode);
 170 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
 171                         int count);
 172 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
 173                         int height, int width);
 174 static int fbcon_switch(struct vc_data *vc);
 175 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
 176 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table);
 177 static int fbcon_scrolldelta(struct vc_data *vc, int lines);
 178
 179 /*
 180  *  Internal routines
 181  */
 182 static __inline__ void ywrap_up(struct vc_data *vc, int count);
 183 static __inline__ void ywrap_down(struct vc_data *vc, int count);
 184 static __inline__ void ypan_up(struct vc_data *vc, int count);
 185 static __inline__ void ypan_down(struct vc_data *vc, int count);
 186 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
 187                             int dy, int dx, int height, int width, u_int y_break);
 188 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
 189                            struct vc_data *vc);
 190 static void fbcon_preset_disp(struct fb_info *info, struct fb_var_screeninfo *var,
 191                               int unit);
 192 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
 193                               int line, int count, int dy);
 194 static void fbcon_modechanged(struct fb_info *info);
 195 static void fbcon_set_all_vcs(struct fb_info *info);
 196 static void fbcon_start(void);
 197 static void fbcon_exit(void);
 198 static struct class_device *fbcon_class_device;
 199
 200 #ifdef CONFIG_MAC
 201 /*
 202  * On the Macintoy, there may or may not be a working VBL int. We need to probe
 203  */
 204 static int vbl_detected;
 205
 206 static irqreturn_t fb_vbl_detect(int irq, void *dummy, struct pt_regs *fp)
 207 {
 208         vbl_detected++;
 209         return IRQ_HANDLED;
 210 }
 211 #endif
 212
 213 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
 214 static inline void fbcon_set_rotation(struct fb_info *info)
 215 {
 216         struct fbcon_ops *ops = info->fbcon_par;
 217
 218         if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
 219             ops->p->con_rotate < 4)
 220                 ops->rotate = ops->p->con_rotate;
 221         else
 222                 ops->rotate = 0;
 223 }
 224
 225 static void fbcon_rotate(struct fb_info *info, u32 rotate)
 226 {
 227         struct fbcon_ops *ops= info->fbcon_par;
 228         struct fb_info *fb_info;
 229
 230         if (!ops || ops->currcon == -1)
 231                 return;
 232
 233         fb_info = registered_fb[con2fb_map[ops->currcon]];
 234
 235         if (info == fb_info) {
 236                 struct display *p = &fb_display[ops->currcon];
 237
 238                 if (rotate < 4)
 239                         p->con_rotate = rotate;
 240                 else
 241                         p->con_rotate = 0;
 242
 243                 fbcon_modechanged(info);
 244         }
 245 }
 246
 247 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
 248 {
 249         struct fbcon_ops *ops = info->fbcon_par;
 250         struct vc_data *vc;
 251         struct display *p;
 252         int i;
 253
 254         if (!ops || ops->currcon < 0 || rotate > 3)
 255                 return;
 256
 257         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 258                 vc = vc_cons[i].d;
 259                 if (!vc || vc->vc_mode != KD_TEXT ||
 260                     registered_fb[con2fb_map[i]] != info)
 261                         continue;
 262
 263                 p = &fb_display[vc->vc_num];
 264                 p->con_rotate = rotate;
 265         }
 266
 267         fbcon_set_all_vcs(info);
 268 }
 269 #else
 270 static inline void fbcon_set_rotation(struct fb_info *info)
 271 {
 272         struct fbcon_ops *ops = info->fbcon_par;
 273
 274         ops->rotate = FB_ROTATE_UR;
 275 }
 276
 277 static void fbcon_rotate(struct fb_info *info, u32 rotate)
 278 {
 279         return;
 280 }
 281
 282 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
 283 {
 284         return;
 285 }
 286 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
 287
 288 static int fbcon_get_rotate(struct fb_info *info)
 289 {
 290         struct fbcon_ops *ops = info->fbcon_par;
 291
 292         return (ops) ? ops->rotate : 0;
 293 }
 294
 295 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
 296 {
 297         struct fbcon_ops *ops = info->fbcon_par;
 298
 299         return (info->state != FBINFO_STATE_RUNNING ||
 300                 vc->vc_mode != KD_TEXT || ops->graphics);
 301 }
 302
 303 static inline int get_color(struct vc_data *vc, struct fb_info *info,
 304               u16 c, int is_fg)
 305 {
 306         int depth = fb_get_color_depth(&info->var, &info->fix);
 307         int color = 0;
 308
 309         if (console_blanked) {
 310                 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
 311
 312                 c = vc->vc_video_erase_char & charmask;
 313         }
 314
 315         if (depth != 1)
 316                 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
 317                         : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
 318
 319         switch (depth) {
 320         case 1:
 321         {
 322                 int col = ~(0xfff << (max(info->var.green.length,
 323                                           max(info->var.red.length,
 324                                               info->var.blue.length)))) & 0xff;
 325
 326                 /* 0 or 1 */
 327                 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
 328                 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
 329
 330                 if (console_blanked)
 331                         fg = bg;
 332
 333                 color = (is_fg) ? fg : bg;
 334                 break;
 335         }
 336         case 2:
 337                 /*
 338                  * Scale down 16-colors to 4 colors. Default 4-color palette
 339                  * is grayscale. However, simply dividing the values by 4
 340                  * will not work, as colors 1, 2 and 3 will be scaled-down
 341                  * to zero rendering them invisible.  So empirically convert
 342                  * colors to a sane 4-level grayscale.
 343                  */
 344                 switch (color) {
 345                 case 0:
 346                         color = 0; /* black */
 347                         break;
 348                 case 1 ... 6:
 349                         color = 2; /* white */
 350                         break;
 351                 case 7 ... 8:
 352                         color = 1; /* gray */
 353                         break;
 354                 default:
 355                         color = 3; /* intense white */
 356                         break;
 357                 }
 358                 break;
 359         case 3:
 360                 /*
 361                  * Last 8 entries of default 16-color palette is a more intense
 362                  * version of the first 8 (i.e., same chrominance, different
 363                  * luminance).
 364                  */
 365                 color &= 7;
 366                 break;
 367         }
 368
 369
 370         return color;
 371 }
 372
 373 static void fbcon_update_softback(struct vc_data *vc)
 374 {
 375         int l = fbcon_softback_size / vc->vc_size_row;
 376
 377         if (l > 5)
 378                 softback_end = softback_buf + l * vc->vc_size_row;
 379         else
 380                 /* Smaller scrollback makes no sense, and 0 would screw
 381                    the operation totally */
 382                 softback_top = 0;
 383 }
 384
 385 static void fb_flashcursor(void *private)
 386 {
 387         struct fb_info *info = private;
 388         struct fbcon_ops *ops = info->fbcon_par;
 389         struct display *p;
 390         struct vc_data *vc = NULL;
 391         int c;
 392         int mode;
 393
 394         acquire_console_sem();
 395         if (ops && ops->currcon != -1)
 396                 vc = vc_cons[ops->currcon].d;
 397
 398         if (!vc || !CON_IS_VISIBLE(vc) ||
 399             fbcon_is_inactive(vc, info) ||
 400             registered_fb[con2fb_map[vc->vc_num]] != info ||
 401             vc_cons[ops->currcon].d->vc_deccm != 1) {
 402                 release_console_sem();
 403                 return;
 404         }
 405
 406         p = &fb_display[vc->vc_num];
 407         c = scr_readw((u16 *) vc->vc_pos);
 408         mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
 409                 CM_ERASE : CM_DRAW;
 410         ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
 411                     get_color(vc, info, c, 0));
 412         release_console_sem();
 413 }
 414
 415 #if defined(CONFIG_ATARI) || defined(CONFIG_MAC)
 416 static int cursor_blink_rate;
 417 static irqreturn_t fb_vbl_handler(int irq, void *dev_id, struct pt_regs *fp)
 418 {
 419         struct fb_info *info = dev_id;
 420
 421         if (vbl_cursor_cnt && --vbl_cursor_cnt == 0) {
 422                 schedule_work(&info->queue);
 423                 vbl_cursor_cnt = cursor_blink_rate;
 424         }
 425         return IRQ_HANDLED;
 426 }
 427 #endif
 428
 429 static void cursor_timer_handler(unsigned long dev_addr)
 430 {
 431         struct fb_info *info = (struct fb_info *) dev_addr;
 432         struct fbcon_ops *ops = info->fbcon_par;
 433
 434         schedule_work(&info->queue);
 435         mod_timer(&ops->cursor_timer, jiffies + HZ/5);
 436 }
 437
 438 static void fbcon_add_cursor_timer(struct fb_info *info)
 439 {
 440         struct fbcon_ops *ops = info->fbcon_par;
 441
 442         if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
 443             !(ops->flags & FBCON_FLAGS_CURSOR_TIMER)) {
 444                 if (!info->queue.func)
 445                         INIT_WORK(&info->queue, fb_flashcursor, info);
 446
 447                 init_timer(&ops->cursor_timer);
 448                 ops->cursor_timer.function = cursor_timer_handler;
 449                 ops->cursor_timer.expires = jiffies + HZ / 5;
 450                 ops->cursor_timer.data = (unsigned long ) info;
 451                 add_timer(&ops->cursor_timer);
 452                 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
 453         }
 454 }
 455
 456 static void fbcon_del_cursor_timer(struct fb_info *info)
 457 {
 458         struct fbcon_ops *ops = info->fbcon_par;
 459
 460         if (info->queue.func == fb_flashcursor &&
 461             ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
 462                 del_timer_sync(&ops->cursor_timer);
 463                 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
 464         }
 465 }
 466
 467 #ifndef MODULE
 468 static int __init fb_console_setup(char *this_opt)
 469 {
 470         char *options;
 471         int i, j;
 472
 473         if (!this_opt || !*this_opt)
 474                 return 1;
 475
 476         while ((options = strsep(&this_opt, ",")) != NULL) {
 477                 if (!strncmp(options, "font:", 5))
 478                         strcpy(fontname, options + 5);
 479
 480                 if (!strncmp(options, "scrollback:", 11)) {
 481                         options += 11;
 482                         if (*options) {
 483                                 fbcon_softback_size = simple_strtoul(options, &options, 0);
 484                                 if (*options == 'k' || *options == 'K') {
 485                                         fbcon_softback_size *= 1024;
 486                                         options++;
 487                                 }
 488                                 if (*options != ',')
 489                                         return 1;
 490                                 options++;
 491                         } else
 492                                 return 1;
 493                 }
 494
 495                 if (!strncmp(options, "map:", 4)) {
 496                         options += 4;
 497                         if (*options)
 498                                 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
 499                                         if (!options[j])
 500                                                 j = 0;
 501                                         con2fb_map_boot[i] =
 502                                                 (options[j++]-'0') % FB_MAX;
 503                                 }
 504                         return 1;
 505                 }
 506
 507                 if (!strncmp(options, "vc:", 3)) {
 508                         options += 3;
 509                         if (*options)
 510                                 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
 511                         if (first_fb_vc < 0)
 512                                 first_fb_vc = 0;
 513                         if (*options++ == '-')
 514                                 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
 515                         fbcon_is_default = 0;
 516                 }
 517
 518                 if (!strncmp(options, "rotate:", 7)) {
 519                         options += 7;
 520                         if (*options)
 521                                 rotate = simple_strtoul(options, &options, 0);
 522                         if (rotate > 3)
 523                                 rotate = 0;
 524                 }
 525         }
 526         return 1;
 527 }
 528
 529 __setup("fbcon=", fb_console_setup);
 530 #endif
 531
 532 static int search_fb_in_map(int idx)
 533 {
 534         int i, retval = 0;
 535
 536         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 537                 if (con2fb_map[i] == idx)
 538                         retval = 1;
 539         }
 540         return retval;
 541 }
 542
 543 static int search_for_mapped_con(void)
 544 {
 545         int i, retval = 0;
 546
 547         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 548                 if (con2fb_map[i] != -1)
 549                         retval = 1;
 550         }
 551         return retval;
 552 }
 553
 554 static int fbcon_takeover(int show_logo)
 555 {
 556         int err, i;
 557
 558         if (!num_registered_fb)
 559                 return -ENODEV;
 560
 561         if (!show_logo)
 562                 logo_shown = FBCON_LOGO_DONTSHOW;
 563
 564         for (i = first_fb_vc; i <= last_fb_vc; i++)
 565                 con2fb_map[i] = info_idx;
 566
 567         err = take_over_console(&fb_con, first_fb_vc, last_fb_vc,
 568                                 fbcon_is_default);
 569
 570         if (err) {
 571                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
 572                         con2fb_map[i] = -1;
 573                 }
 574                 info_idx = -1;
 575         }
 576
 577         return err;
 578 }
 579
 580 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
 581                                int cols, int rows, int new_cols, int new_rows)
 582 {
 583         /* Need to make room for the logo */
 584         struct fbcon_ops *ops = info->fbcon_par;
 585         int cnt, erase = vc->vc_video_erase_char, step;
 586         unsigned short *save = NULL, *r, *q;
 587
 588         /*
 589          * remove underline attribute from erase character
 590          * if black and white framebuffer.
 591          */
 592         if (fb_get_color_depth(&info->var, &info->fix) == 1)
 593                 erase &= ~0x400;
 594         logo_height = fb_prepare_logo(info, ops->rotate);
 595         logo_lines = (logo_height + vc->vc_font.height - 1) /
 596                 vc->vc_font.height;
 597         q = (unsigned short *) (vc->vc_origin +
 598                                 vc->vc_size_row * rows);
 599         step = logo_lines * cols;
 600         for (r = q - logo_lines * cols; r < q; r++)
 601                 if (scr_readw(r) != vc->vc_video_erase_char)
 602                         break;
 603         if (r != q && new_rows >= rows + logo_lines) {
 604                 save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
 605                 if (save) {
 606                         int i = cols < new_cols ? cols : new_cols;
 607                         scr_memsetw(save, erase, logo_lines * new_cols * 2);
 608                         r = q - step;
 609                         for (cnt = 0; cnt < logo_lines; cnt++, r += i)
 610                                 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
 611                         r = q;
 612                 }
 613         }
 614         if (r == q) {
 615                 /* We can scroll screen down */
 616                 r = q - step - cols;
 617                 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
 618                         scr_memcpyw(r + step, r, vc->vc_size_row);
 619                         r -= cols;
 620                 }
 621                 if (!save) {
 622                         vc->vc_y += logo_lines;
 623                         vc->vc_pos += logo_lines * vc->vc_size_row;
 624                 }
 625         }
 626         scr_memsetw((unsigned short *) vc->vc_origin,
 627                     erase,
 628                     vc->vc_size_row * logo_lines);
 629
 630         if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
 631                 fbcon_clear_margins(vc, 0);
 632                 update_screen(vc);
 633         }
 634
 635         if (save) {
 636                 q = (unsigned short *) (vc->vc_origin +
 637                                         vc->vc_size_row *
 638                                         rows);
 639                 scr_memcpyw(q, save, logo_lines * new_cols * 2);
 640                 vc->vc_y += logo_lines;
 641                 vc->vc_pos += logo_lines * vc->vc_size_row;
 642                 kfree(save);
 643         }
 644
 645         if (logo_lines > vc->vc_bottom) {
 646                 logo_shown = FBCON_LOGO_CANSHOW;
 647                 printk(KERN_INFO
 648                        "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
 649         } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
 650                 logo_shown = FBCON_LOGO_DRAW;
 651                 vc->vc_top = logo_lines;
 652         }
 653 }
 654
 655 #ifdef CONFIG_FB_TILEBLITTING
 656 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
 657 {
 658         struct fbcon_ops *ops = info->fbcon_par;
 659
 660         ops->p = &fb_display[vc->vc_num];
 661
 662         if ((info->flags & FBINFO_MISC_TILEBLITTING))
 663                 fbcon_set_tileops(vc, info);
 664         else {
 665                 fbcon_set_rotation(info);
 666                 fbcon_set_bitops(ops);
 667         }
 668 }
 669 #else
 670 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
 671 {
 672         struct fbcon_ops *ops = info->fbcon_par;
 673
 674         info->flags &= ~FBINFO_MISC_TILEBLITTING;
 675         ops->p = &fb_display[vc->vc_num];
 676         fbcon_set_rotation(info);
 677         fbcon_set_bitops(ops);
 678 }
 679 #endif /* CONFIG_MISC_TILEBLITTING */
 680
 681
 682 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
 683                                   int unit, int oldidx)
 684 {
 685         struct fbcon_ops *ops = NULL;
 686         int err = 0;
 687
 688         if (!try_module_get(info->fbops->owner))
 689                 err = -ENODEV;
 690
 691         if (!err && info->fbops->fb_open &&
 692             info->fbops->fb_open(info, 0))
 693                 err = -ENODEV;
 694
 695         if (!err) {
 696                 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
 697                 if (!ops)
 698                         err = -ENOMEM;
 699         }
 700
 701         if (!err) {
 702                 info->fbcon_par = ops;
 703                 set_blitting_type(vc, info);
 704         }
 705
 706         if (err) {
 707                 con2fb_map[unit] = oldidx;
 708                 module_put(info->fbops->owner);
 709         }
 710
 711         return err;
 712 }
 713
 714 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
 715                                   struct fb_info *newinfo, int unit,
 716                                   int oldidx, int found)
 717 {
 718         struct fbcon_ops *ops = oldinfo->fbcon_par;
 719         int err = 0;
 720
 721         if (oldinfo->fbops->fb_release &&
 722             oldinfo->fbops->fb_release(oldinfo, 0)) {
 723                 con2fb_map[unit] = oldidx;
 724                 if (!found && newinfo->fbops->fb_release)
 725                         newinfo->fbops->fb_release(newinfo, 0);
 726                 if (!found)
 727                         module_put(newinfo->fbops->owner);
 728                 err = -ENODEV;
 729         }
 730
 731         if (!err) {
 732                 fbcon_del_cursor_timer(oldinfo);
 733                 kfree(ops->cursor_state.mask);
 734                 kfree(ops->cursor_data);
 735                 kfree(ops->fontbuffer);
 736                 kfree(oldinfo->fbcon_par);
 737                 oldinfo->fbcon_par = NULL;
 738                 module_put(oldinfo->fbops->owner);
 739                 /*
 740                   If oldinfo and newinfo are driving the same hardware,
 741                   the fb_release() method of oldinfo may attempt to
 742                   restore the hardware state.  This will leave the
 743                   newinfo in an undefined state. Thus, a call to
 744                   fb_set_par() may be needed for the newinfo.
 745                 */
 746                 if (newinfo->fbops->fb_set_par)
 747                         newinfo->fbops->fb_set_par(newinfo);
 748         }
 749
 750         return err;
 751 }
 752
 753 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
 754                                 int unit, int show_logo)
 755 {
 756         struct fbcon_ops *ops = info->fbcon_par;
 757
 758         ops->currcon = fg_console;
 759
 760         if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT))
 761                 info->fbops->fb_set_par(info);
 762
 763         ops->flags |= FBCON_FLAGS_INIT;
 764         ops->graphics = 0;
 765
 766         if (vc)
 767                 fbcon_set_disp(info, &info->var, vc);
 768         else
 769                 fbcon_preset_disp(info, &info->var, unit);
 770
 771         if (show_logo) {
 772                 struct vc_data *fg_vc = vc_cons[fg_console].d;
 773                 struct fb_info *fg_info =
 774                         registered_fb[con2fb_map[fg_console]];
 775
 776                 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
 777                                    fg_vc->vc_rows, fg_vc->vc_cols,
 778                                    fg_vc->vc_rows);
 779         }
 780
 781         update_screen(vc_cons[fg_console].d);
 782 }
 783
 784 /**
 785  *      set_con2fb_map - map console to frame buffer device
 786  *      @unit: virtual console number to map
 787  *      @newidx: frame buffer index to map virtual console to
 788  *      @user: user request
 789  *
 790  *      Maps a virtual console @unit to a frame buffer device
 791  *      @newidx.
 792  */
 793 static int set_con2fb_map(int unit, int newidx, int user)
 794 {
 795         struct vc_data *vc = vc_cons[unit].d;
 796         int oldidx = con2fb_map[unit];
 797         struct fb_info *info = registered_fb[newidx];
 798         struct fb_info *oldinfo = NULL;
 799         int found, err = 0;
 800
 801         if (oldidx == newidx)
 802                 return 0;
 803
 804         if (!info || fbcon_has_exited)
 805                 return -EINVAL;
 806
 807         if (!err && !search_for_mapped_con()) {
 808                 info_idx = newidx;
 809                 return fbcon_takeover(0);
 810         }
 811
 812         if (oldidx != -1)
 813                 oldinfo = registered_fb[oldidx];
 814
 815         found = search_fb_in_map(newidx);
 816
 817         acquire_console_sem();
 818         con2fb_map[unit] = newidx;
 819         if (!err && !found)
 820                 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
 821
 822
 823         /*
 824          * If old fb is not mapped to any of the consoles,
 825          * fbcon should release it.
 826          */
 827         if (!err && oldinfo && !search_fb_in_map(oldidx))
 828                 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
 829                                              found);
 830
 831         if (!err) {
 832                 int show_logo = (fg_console == 0 && !user &&
 833                                  logo_shown != FBCON_LOGO_DONTSHOW);
 834
 835                 if (!found)
 836                         fbcon_add_cursor_timer(info);
 837                 con2fb_map_boot[unit] = newidx;
 838                 con2fb_init_display(vc, info, unit, show_logo);
 839         }
 840
 841         if (!search_fb_in_map(info_idx))
 842                 info_idx = newidx;
 843
 844         release_console_sem();
 845         return err;
 846 }
 847
 848 /*
 849  *  Low Level Operations
 850  */
 851 /* NOTE: fbcon cannot be __init: it may be called from take_over_console later */
 852 static int var_to_display(struct display *disp,
 853                           struct fb_var_screeninfo *var,
 854                           struct fb_info *info)
 855 {
 856         disp->xres_virtual = var->xres_virtual;
 857         disp->yres_virtual = var->yres_virtual;
 858         disp->bits_per_pixel = var->bits_per_pixel;
 859         disp->grayscale = var->grayscale;
 860         disp->nonstd = var->nonstd;
 861         disp->accel_flags = var->accel_flags;
 862         disp->height = var->height;
 863         disp->width = var->width;
 864         disp->red = var->red;
 865         disp->green = var->green;
 866         disp->blue = var->blue;
 867         disp->transp = var->transp;
 868         disp->rotate = var->rotate;
 869         disp->mode = fb_match_mode(var, &info->modelist);
 870         if (disp->mode == NULL)
 871                 /* This should not happen */
 872                 return -EINVAL;
 873         return 0;
 874 }
 875
 876 static void display_to_var(struct fb_var_screeninfo *var,
 877                            struct display *disp)
 878 {
 879         fb_videomode_to_var(var, disp->mode);
 880         var->xres_virtual = disp->xres_virtual;
 881         var->yres_virtual = disp->yres_virtual;
 882         var->bits_per_pixel = disp->bits_per_pixel;
 883         var->grayscale = disp->grayscale;
 884         var->nonstd = disp->nonstd;
 885         var->accel_flags = disp->accel_flags;
 886         var->height = disp->height;
 887         var->width = disp->width;
 888         var->red = disp->red;
 889         var->green = disp->green;
 890         var->blue = disp->blue;
 891         var->transp = disp->transp;
 892         var->rotate = disp->rotate;
 893 }
 894
 895 static const char *fbcon_startup(void)
 896 {
 897         const char *display_desc = "frame buffer device";
 898         struct display *p = &fb_display[fg_console];
 899         struct vc_data *vc = vc_cons[fg_console].d;
 900         const struct font_desc *font = NULL;
 901         struct module *owner;
 902         struct fb_info *info = NULL;
 903         struct fbcon_ops *ops;
 904         int rows, cols;
 905         int irqres;
 906
 907         irqres = 1;
 908         /*
 909          *  If num_registered_fb is zero, this is a call for the dummy part.
 910          *  The frame buffer devices weren't initialized yet.
 911          */
 912         if (!num_registered_fb || info_idx == -1)
 913                 return display_desc;
 914         /*
 915          * Instead of blindly using registered_fb[0], we use info_idx, set by
 916          * fb_console_init();
 917          */
 918         info = registered_fb[info_idx];
 919         if (!info)
 920                 return NULL;
 921
 922         owner = info->fbops->owner;
 923         if (!try_module_get(owner))
 924                 return NULL;
 925         if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
 926                 module_put(owner);
 927                 return NULL;
 928         }
 929
 930         ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
 931         if (!ops) {
 932                 module_put(owner);
 933                 return NULL;
 934         }
 935
 936         ops->currcon = -1;
 937         ops->graphics = 1;
 938         ops->cur_rotate = -1;
 939         info->fbcon_par = ops;
 940         p->con_rotate = rotate;
 941         set_blitting_type(vc, info);
 942
 943         if (info->fix.type != FB_TYPE_TEXT) {
 944                 if (fbcon_softback_size) {
 945                         if (!softback_buf) {
 946                                 softback_buf =
 947                                     (unsigned long)
 948                                     kmalloc(fbcon_softback_size,
 949                                             GFP_KERNEL);
 950                                 if (!softback_buf) {
 951                                         fbcon_softback_size = 0;
 952                                         softback_top = 0;
 953                                 }
 954                         }
 955                 } else {
 956                         if (softback_buf) {
 957                                 kfree((void *) softback_buf);
 958                                 softback_buf = 0;
 959                                 softback_top = 0;
 960                         }
 961                 }
 962                 if (softback_buf)
 963                         softback_in = softback_top = softback_curr =
 964                             softback_buf;
 965                 softback_lines = 0;
 966         }
 967
 968         /* Setup default font */
 969         if (!p->fontdata) {
 970                 if (!fontname[0] || !(font = find_font(fontname)))
 971                         font = get_default_font(info->var.xres,
 972                                                 info->var.yres);
 973                 vc->vc_font.width = font->width;
 974                 vc->vc_font.height = font->height;
 975                 vc->vc_font.data = (void *)(p->fontdata = font->data);
 976                 vc->vc_font.charcount = 256; /* FIXME  Need to support more fonts */
 977         }
 978
 979         cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
 980         rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
 981         cols /= vc->vc_font.width;
 982         rows /= vc->vc_font.height;
 983         vc_resize(vc, cols, rows);
 984
 985         DPRINTK("mode:   %s\n", info->fix.id);
 986         DPRINTK("visual: %d\n", info->fix.visual);
 987         DPRINTK("res:    %dx%d-%d\n", info->var.xres,
 988                 info->var.yres,
 989                 info->var.bits_per_pixel);
 990
 991 #ifdef CONFIG_ATARI
 992         if (MACH_IS_ATARI) {
 993                 cursor_blink_rate = ATARI_CURSOR_BLINK_RATE;
 994                 irqres =
 995                     request_irq(IRQ_AUTO_4, fb_vbl_handler,
 996                                 IRQ_TYPE_PRIO, "framebuffer vbl",
 997                                 info);
 998         }
 999 #endif                          /* CONFIG_ATARI */
1000
1001 #ifdef CONFIG_MAC
1002         /*
1003          * On a Macintoy, the VBL interrupt may or may not be active.
1004          * As interrupt based cursor is more reliable and race free, we
1005          * probe for VBL interrupts.
1006          */
1007         if (MACH_IS_MAC) {
1008                 int ct = 0;
1009                 /*
1010                  * Probe for VBL: set temp. handler ...
1011                  */
1012                 irqres = request_irq(IRQ_MAC_VBL, fb_vbl_detect, 0,
1013                                      "framebuffer vbl", info);
1014                 vbl_detected = 0;
1015
1016                 /*
1017                  * ... and spin for 20 ms ...
1018                  */
1019                 while (!vbl_detected && ++ct < 1000)
1020                         udelay(20);
1021
1022                 if (ct == 1000)
1023                         printk
1024                             ("fbcon_startup: No VBL detected, using timer based cursor.\n");
1025
1026                 free_irq(IRQ_MAC_VBL, fb_vbl_detect);
1027
1028                 if (vbl_detected) {
1029                         /*
1030                          * interrupt based cursor ok
1031                          */
1032                         cursor_blink_rate = MAC_CURSOR_BLINK_RATE;
1033                         irqres =
1034                             request_irq(IRQ_MAC_VBL, fb_vbl_handler, 0,
1035                                         "framebuffer vbl", info);
1036                 } else {
1037                         /*
1038                          * VBL not detected: fall through, use timer based cursor
1039                          */
1040                         irqres = 1;
1041                 }
1042         }
1043 #endif                          /* CONFIG_MAC */
1044
1045         fbcon_add_cursor_timer(info);
1046         fbcon_has_exited = 0;
1047         return display_desc;
1048 }
1049
1050 static void fbcon_init(struct vc_data *vc, int init)
1051 {
1052         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1053         struct fbcon_ops *ops;
1054         struct vc_data **default_mode = vc->vc_display_fg;
1055         struct vc_data *svc = *default_mode;
1056         struct display *t, *p = &fb_display[vc->vc_num];
1057         int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
1058         int cap;
1059
1060         if (info_idx == -1 || info == NULL)
1061             return;
1062
1063         cap = info->flags;
1064
1065         if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1066             (info->fix.type == FB_TYPE_TEXT))
1067                 logo = 0;
1068
1069         if (var_to_display(p, &info->var, info))
1070                 return;
1071
1072         /* If we are not the first console on this
1073            fb, copy the font from that console */
1074         t = &fb_display[fg_console];
1075         if (!p->fontdata) {
1076                 if (t->fontdata) {
1077                         struct vc_data *fvc = vc_cons[fg_console].d;
1078
1079                         vc->vc_font.data = (void *)(p->fontdata =
1080                                                     fvc->vc_font.data);
1081                         vc->vc_font.width = fvc->vc_font.width;
1082                         vc->vc_font.height = fvc->vc_font.height;
1083                         p->userfont = t->userfont;
1084
1085                         if (p->userfont)
1086                                 REFCOUNT(p->fontdata)++;
1087                 } else {
1088                         const struct font_desc *font = NULL;
1089
1090                         if (!fontname[0] || !(font = find_font(fontname)))
1091                                 font = get_default_font(info->var.xres,
1092                                                         info->var.yres);
1093                         vc->vc_font.width = font->width;
1094                         vc->vc_font.height = font->height;
1095                         vc->vc_font.data = (void *)(p->fontdata = font->data);
1096                         vc->vc_font.charcount = 256; /* FIXME  Need to
1097                                                         support more fonts */
1098                 }
1099         }
1100
1101         if (p->userfont)
1102                 charcnt = FNTCHARCNT(p->fontdata);
1103
1104         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1105         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1106         if (charcnt == 256) {
1107                 vc->vc_hi_font_mask = 0;
1108         } else {
1109                 vc->vc_hi_font_mask = 0x100;
1110                 if (vc->vc_can_do_color)
1111                         vc->vc_complement_mask <<= 1;
1112         }
1113
1114         if (!*svc->vc_uni_pagedir_loc)
1115                 con_set_default_unimap(svc);
1116         if (!*vc->vc_uni_pagedir_loc)
1117                 con_copy_unimap(vc, svc);
1118
1119         ops = info->fbcon_par;
1120         p->con_rotate = rotate;
1121         set_blitting_type(vc, info);
1122
1123         cols = vc->vc_cols;
1124         rows = vc->vc_rows;
1125         new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1126         new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1127         new_cols /= vc->vc_font.width;
1128         new_rows /= vc->vc_font.height;
1129         vc_resize(vc, new_cols, new_rows);
1130
1131         /*
1132          * We must always set the mode. The mode of the previous console
1133          * driver could be in the same resolution but we are using different
1134          * hardware so we have to initialize the hardware.
1135          *
1136          * We need to do it in fbcon_init() to prevent screen corruption.
1137          */
1138         if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
1139                 if (info->fbops->fb_set_par &&
1140                     !(ops->flags & FBCON_FLAGS_INIT))
1141                         info->fbops->fb_set_par(info);
1142                 ops->flags |= FBCON_FLAGS_INIT;
1143         }
1144
1145         ops->graphics = 0;
1146
1147         if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1148             !(cap & FBINFO_HWACCEL_DISABLED))
1149                 p->scrollmode = SCROLL_MOVE;
1150         else /* default to something safe */
1151                 p->scrollmode = SCROLL_REDRAW;
1152
1153         /*
1154          *  ++guenther: console.c:vc_allocate() relies on initializing
1155          *  vc_{cols,rows}, but we must not set those if we are only
1156          *  resizing the console.
1157          */
1158         if (!init) {
1159                 vc->vc_cols = new_cols;
1160                 vc->vc_rows = new_rows;
1161         }
1162
1163         if (logo)
1164                 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1165
1166         if (vc == svc && softback_buf)
1167                 fbcon_update_softback(vc);
1168
1169         if (ops->rotate_font && ops->rotate_font(info, vc)) {
1170                 ops->rotate = FB_ROTATE_UR;
1171                 set_blitting_type(vc, info);
1172         }
1173
1174         ops->p = &fb_display[fg_console];
1175 }
1176
1177 static void fbcon_free_font(struct display *p)
1178 {
1179         if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1180                 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1181         p->fontdata = NULL;
1182         p->userfont = 0;
1183 }
1184
1185 static void fbcon_deinit(struct vc_data *vc)
1186 {
1187         struct display *p = &fb_display[vc->vc_num];
1188         struct fb_info *info;
1189         struct fbcon_ops *ops;
1190         int idx;
1191
1192         fbcon_free_font(p);
1193         idx = con2fb_map[vc->vc_num];
1194
1195         if (idx == -1)
1196                 goto finished;
1197
1198         info = registered_fb[idx];
1199
1200         if (!info)
1201                 goto finished;
1202
1203         ops = info->fbcon_par;
1204
1205         if (!ops)
1206                 goto finished;
1207
1208         if (CON_IS_VISIBLE(vc))
1209                 fbcon_del_cursor_timer(info);
1210
1211         ops->flags &= ~FBCON_FLAGS_INIT;
1212 finished:
1213
1214         if (!con_is_bound(&fb_con))
1215                 fbcon_exit();
1216
1217         return;
1218 }
1219
1220 /* ====================================================================== */
1221
1222 /*  fbcon_XXX routines - interface used by the world
1223  *
1224  *  This system is now divided into two levels because of complications
1225  *  caused by hardware scrolling. Top level functions:
1226  *
1227  *      fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1228  *
1229  *  handles y values in range [0, scr_height-1] that correspond to real
1230  *  screen positions. y_wrap shift means that first line of bitmap may be
1231  *  anywhere on this display. These functions convert lineoffsets to
1232  *  bitmap offsets and deal with the wrap-around case by splitting blits.
1233  *
1234  *      fbcon_bmove_physical_8()    -- These functions fast implementations
1235  *      fbcon_clear_physical_8()    -- of original fbcon_XXX fns.
1236  *      fbcon_putc_physical_8()     -- (font width != 8) may be added later
1237  *
1238  *  WARNING:
1239  *
1240  *  At the moment fbcon_putc() cannot blit across vertical wrap boundary
1241  *  Implies should only really hardware scroll in rows. Only reason for
1242  *  restriction is simplicity & efficiency at the moment.
1243  */
1244
1245 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1246                         int width)
1247 {
1248         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1249         struct fbcon_ops *ops = info->fbcon_par;
1250
1251         struct display *p = &fb_display[vc->vc_num];
1252         u_int y_break;
1253
1254         if (fbcon_is_inactive(vc, info))
1255                 return;
1256
1257         if (!height || !width)
1258                 return;
1259
1260         /* Split blits that cross physical y_wrap boundary */
1261
1262         y_break = p->vrows - p->yscroll;
1263         if (sy < y_break && sy + height - 1 >= y_break) {
1264                 u_int b = y_break - sy;
1265                 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1266                 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1267                                  width);
1268         } else
1269                 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1270 }
1271
1272 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1273                         int count, int ypos, int xpos)
1274 {
1275         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1276         struct display *p = &fb_display[vc->vc_num];
1277         struct fbcon_ops *ops = info->fbcon_par;
1278
1279         if (!fbcon_is_inactive(vc, info))
1280                 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1281                            get_color(vc, info, scr_readw(s), 1),
1282                            get_color(vc, info, scr_readw(s), 0));
1283 }
1284
1285 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1286 {
1287         unsigned short chr;
1288
1289         scr_writew(c, &chr);
1290         fbcon_putcs(vc, &chr, 1, ypos, xpos);
1291 }
1292
1293 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1294 {
1295         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1296         struct fbcon_ops *ops = info->fbcon_par;
1297
1298         if (!fbcon_is_inactive(vc, info))
1299                 ops->clear_margins(vc, info, bottom_only);
1300 }
1301
1302 static void fbcon_cursor(struct vc_data *vc, int mode)
1303 {
1304         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1305         struct fbcon_ops *ops = info->fbcon_par;
1306         int y;
1307         int c = scr_readw((u16 *) vc->vc_pos);
1308
1309         if (fbcon_is_inactive(vc, info))
1310                 return;
1311
1312         ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1313         if (mode & CM_SOFTBACK) {
1314                 mode &= ~CM_SOFTBACK;
1315                 y = softback_lines;
1316         } else {
1317                 if (softback_lines)
1318                         fbcon_set_origin(vc);
1319                 y = 0;
1320         }
1321
1322         ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
1323                     get_color(vc, info, c, 0));
1324         vbl_cursor_cnt = CURSOR_DRAW_DELAY;
1325 }
1326
1327 static int scrollback_phys_max = 0;
1328 static int scrollback_max = 0;
1329 static int scrollback_current = 0;
1330
1331 /*
1332  * If no vc is existent yet, just set struct display
1333  */
1334 static void fbcon_preset_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1335                               int unit)
1336 {
1337         struct display *p = &fb_display[unit];
1338         struct display *t = &fb_display[fg_console];
1339
1340         if (var_to_display(p, var, info))
1341                 return;
1342
1343         p->fontdata = t->fontdata;
1344         p->userfont = t->userfont;
1345         if (p->userfont)
1346                 REFCOUNT(p->fontdata)++;
1347 }
1348
1349 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1350                            struct vc_data *vc)
1351 {
1352         struct display *p = &fb_display[vc->vc_num], *t;
1353         struct vc_data **default_mode = vc->vc_display_fg;
1354         struct vc_data *svc = *default_mode;
1355         struct fbcon_ops *ops = info->fbcon_par;
1356         int rows, cols, charcnt = 256;
1357
1358         if (var_to_display(p, var, info))
1359                 return;
1360         t = &fb_display[svc->vc_num];
1361         if (!vc->vc_font.data) {
1362                 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1363                 vc->vc_font.width = (*default_mode)->vc_font.width;
1364                 vc->vc_font.height = (*default_mode)->vc_font.height;
1365                 p->userfont = t->userfont;
1366                 if (p->userfont)
1367                         REFCOUNT(p->fontdata)++;
1368         }
1369         if (p->userfont)
1370                 charcnt = FNTCHARCNT(p->fontdata);
1371
1372         var->activate = FB_ACTIVATE_NOW;
1373         info->var.activate = var->activate;
1374         var->yoffset = info->var.yoffset;
1375         var->xoffset = info->var.xoffset;
1376         fb_set_var(info, var);
1377         ops->var = info->var;
1378         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1379         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1380         if (charcnt == 256) {
1381                 vc->vc_hi_font_mask = 0;
1382         } else {
1383                 vc->vc_hi_font_mask = 0x100;
1384                 if (vc->vc_can_do_color)
1385                         vc->vc_complement_mask <<= 1;
1386         }
1387
1388         if (!*svc->vc_uni_pagedir_loc)
1389                 con_set_default_unimap(svc);
1390         if (!*vc->vc_uni_pagedir_loc)
1391                 con_copy_unimap(vc, svc);
1392
1393         cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1394         rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1395         cols /= vc->vc_font.width;
1396         rows /= vc->vc_font.height;
1397         vc_resize(vc, cols, rows);
1398
1399         if (CON_IS_VISIBLE(vc)) {
1400                 update_screen(vc);
1401                 if (softback_buf)
1402                         fbcon_update_softback(vc);
1403         }
1404 }
1405
1406 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1407 {
1408         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1409         struct fbcon_ops *ops = info->fbcon_par;
1410         struct display *p = &fb_display[vc->vc_num];
1411
1412         p->yscroll += count;
1413         if (p->yscroll >= p->vrows)     /* Deal with wrap */
1414                 p->yscroll -= p->vrows;
1415         ops->var.xoffset = 0;
1416         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1417         ops->var.vmode |= FB_VMODE_YWRAP;
1418         ops->update_start(info);
1419         scrollback_max += count;
1420         if (scrollback_max > scrollback_phys_max)
1421                 scrollback_max = scrollback_phys_max;
1422         scrollback_current = 0;
1423 }
1424
1425 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1426 {
1427         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1428         struct fbcon_ops *ops = info->fbcon_par;
1429         struct display *p = &fb_display[vc->vc_num];
1430
1431         p->yscroll -= count;
1432         if (p->yscroll < 0)     /* Deal with wrap */
1433                 p->yscroll += p->vrows;
1434         ops->var.xoffset = 0;
1435         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1436         ops->var.vmode |= FB_VMODE_YWRAP;
1437         ops->update_start(info);
1438         scrollback_max -= count;
1439         if (scrollback_max < 0)
1440                 scrollback_max = 0;
1441         scrollback_current = 0;
1442 }
1443
1444 static __inline__ void ypan_up(struct vc_data *vc, int count)
1445 {
1446         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1447         struct display *p = &fb_display[vc->vc_num];
1448         struct fbcon_ops *ops = info->fbcon_par;
1449
1450         p->yscroll += count;
1451         if (p->yscroll > p->vrows - vc->vc_rows) {
1452                 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1453                             0, 0, 0, vc->vc_rows, vc->vc_cols);
1454                 p->yscroll -= p->vrows - vc->vc_rows;
1455         }
1456
1457         ops->var.xoffset = 0;
1458         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1459         ops->var.vmode &= ~FB_VMODE_YWRAP;
1460         ops->update_start(info);
1461         fbcon_clear_margins(vc, 1);
1462         scrollback_max += count;
1463         if (scrollback_max > scrollback_phys_max)
1464                 scrollback_max = scrollback_phys_max;
1465         scrollback_current = 0;
1466 }
1467
1468 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1469 {
1470         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1471         struct fbcon_ops *ops = info->fbcon_par;
1472         struct display *p = &fb_display[vc->vc_num];
1473
1474         p->yscroll += count;
1475
1476         if (p->yscroll > p->vrows - vc->vc_rows) {
1477                 p->yscroll -= p->vrows - vc->vc_rows;
1478                 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1479         }
1480
1481         ops->var.xoffset = 0;
1482         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1483         ops->var.vmode &= ~FB_VMODE_YWRAP;
1484         ops->update_start(info);
1485         fbcon_clear_margins(vc, 1);
1486         scrollback_max += count;
1487         if (scrollback_max > scrollback_phys_max)
1488                 scrollback_max = scrollback_phys_max;
1489         scrollback_current = 0;
1490 }
1491
1492 static __inline__ void ypan_down(struct vc_data *vc, int count)
1493 {
1494         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1495         struct display *p = &fb_display[vc->vc_num];
1496         struct fbcon_ops *ops = info->fbcon_par;
1497
1498         p->yscroll -= count;
1499         if (p->yscroll < 0) {
1500                 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1501                             0, vc->vc_rows, vc->vc_cols);
1502                 p->yscroll += p->vrows - vc->vc_rows;
1503         }
1504
1505         ops->var.xoffset = 0;
1506         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1507         ops->var.vmode &= ~FB_VMODE_YWRAP;
1508         ops->update_start(info);
1509         fbcon_clear_margins(vc, 1);
1510         scrollback_max -= count;
1511         if (scrollback_max < 0)
1512                 scrollback_max = 0;
1513         scrollback_current = 0;
1514 }
1515
1516 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1517 {
1518         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1519         struct fbcon_ops *ops = info->fbcon_par;
1520         struct display *p = &fb_display[vc->vc_num];
1521
1522         p->yscroll -= count;
1523
1524         if (p->yscroll < 0) {
1525                 p->yscroll += p->vrows - vc->vc_rows;
1526                 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1527         }
1528
1529         ops->var.xoffset = 0;
1530         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1531         ops->var.vmode &= ~FB_VMODE_YWRAP;
1532         ops->update_start(info);
1533         fbcon_clear_margins(vc, 1);
1534         scrollback_max -= count;
1535         if (scrollback_max < 0)
1536                 scrollback_max = 0;
1537         scrollback_current = 0;
1538 }
1539
1540 static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1541                                   long delta)
1542 {
1543         int count = vc->vc_rows;
1544         unsigned short *d, *s;
1545         unsigned long n;
1546         int line = 0;
1547
1548         d = (u16 *) softback_curr;
1549         if (d == (u16 *) softback_in)
1550                 d = (u16 *) vc->vc_origin;
1551         n = softback_curr + delta * vc->vc_size_row;
1552         softback_lines -= delta;
1553         if (delta < 0) {
1554                 if (softback_curr < softback_top && n < softback_buf) {
1555                         n += softback_end - softback_buf;
1556                         if (n < softback_top) {
1557                                 softback_lines -=
1558                                     (softback_top - n) / vc->vc_size_row;
1559                                 n = softback_top;
1560                         }
1561                 } else if (softback_curr >= softback_top
1562                            && n < softback_top) {
1563                         softback_lines -=
1564                             (softback_top - n) / vc->vc_size_row;
1565                         n = softback_top;
1566                 }
1567         } else {
1568                 if (softback_curr > softback_in && n >= softback_end) {
1569                         n += softback_buf - softback_end;
1570                         if (n > softback_in) {
1571                                 n = softback_in;
1572                                 softback_lines = 0;
1573                         }
1574                 } else if (softback_curr <= softback_in && n > softback_in) {
1575                         n = softback_in;
1576                         softback_lines = 0;
1577                 }
1578         }
1579         if (n == softback_curr)
1580                 return;
1581         softback_curr = n;
1582         s = (u16 *) softback_curr;
1583         if (s == (u16 *) softback_in)
1584                 s = (u16 *) vc->vc_origin;
1585         while (count--) {
1586                 unsigned short *start;
1587                 unsigned short *le;
1588                 unsigned short c;
1589                 int x = 0;
1590                 unsigned short attr = 1;
1591
1592                 start = s;
1593                 le = advance_row(s, 1);
1594                 do {
1595                         c = scr_readw(s);
1596                         if (attr != (c & 0xff00)) {
1597                                 attr = c & 0xff00;
1598                                 if (s > start) {
1599                                         fbcon_putcs(vc, start, s - start,
1600                                                     line, x);
1601                                         x += s - start;
1602                                         start = s;
1603                                 }
1604                         }
1605                         if (c == scr_readw(d)) {
1606                                 if (s > start) {
1607                                         fbcon_putcs(vc, start, s - start,
1608                                                     line, x);
1609                                         x += s - start + 1;
1610                                         start = s + 1;
1611                                 } else {
1612                                         x++;
1613                                         start++;
1614                                 }
1615                         }
1616                         s++;
1617                         d++;
1618                 } while (s < le);
1619                 if (s > start)
1620                         fbcon_putcs(vc, start, s - start, line, x);
1621                 line++;
1622                 if (d == (u16 *) softback_end)
1623                         d = (u16 *) softback_buf;
1624                 if (d == (u16 *) softback_in)
1625                         d = (u16 *) vc->vc_origin;
1626                 if (s == (u16 *) softback_end)
1627                         s = (u16 *) softback_buf;
1628                 if (s == (u16 *) softback_in)
1629                         s = (u16 *) vc->vc_origin;
1630         }
1631 }
1632
1633 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1634                               int line, int count, int dy)
1635 {
1636         unsigned short *s = (unsigned short *)
1637                 (vc->vc_origin + vc->vc_size_row * line);
1638
1639         while (count--) {
1640                 unsigned short *start = s;
1641                 unsigned short *le = advance_row(s, 1);
1642                 unsigned short c;
1643                 int x = 0;
1644                 unsigned short attr = 1;
1645
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                                                     dy, x);
1653                                         x += s - start;
1654                                         start = s;
1655                                 }
1656                         }
1657                         console_conditional_schedule();
1658                         s++;
1659                 } while (s < le);
1660                 if (s > start)
1661                         fbcon_putcs(vc, start, s - start, dy, x);
1662                 console_conditional_schedule();
1663                 dy++;
1664         }
1665 }
1666
1667 static void fbcon_redraw(struct vc_data *vc, struct display *p,
1668                          int line, int count, int offset)
1669 {
1670         unsigned short *d = (unsigned short *)
1671             (vc->vc_origin + vc->vc_size_row * line);
1672         unsigned short *s = d + offset;
1673
1674         while (count--) {
1675                 unsigned short *start = s;
1676                 unsigned short *le = advance_row(s, 1);
1677                 unsigned short c;
1678                 int x = 0;
1679                 unsigned short attr = 1;
1680
1681                 do {
1682                         c = scr_readw(s);
1683                         if (attr != (c & 0xff00)) {
1684                                 attr = c & 0xff00;
1685                                 if (s > start) {
1686                                         fbcon_putcs(vc, start, s - start,
1687                                                     line, x);
1688                                         x += s - start;
1689                                         start = s;
1690                                 }
1691                         }
1692                         if (c == scr_readw(d)) {
1693                                 if (s > start) {
1694                                         fbcon_putcs(vc, start, s - start,
1695                                                      line, x);
1696                                         x += s - start + 1;
1697                                         start = s + 1;
1698                                 } else {
1699                                         x++;
1700                                         start++;
1701                                 }
1702                         }
1703                         scr_writew(c, d);
1704                         console_conditional_schedule();
1705                         s++;
1706                         d++;
1707                 } while (s < le);
1708                 if (s > start)
1709                         fbcon_putcs(vc, start, s - start, line, x);
1710                 console_conditional_schedule();
1711                 if (offset > 0)
1712                         line++;
1713                 else {
1714                         line--;
1715                         /* NOTE: We subtract two lines from these pointers */
1716                         s -= vc->vc_size_row;
1717                         d -= vc->vc_size_row;
1718                 }
1719         }
1720 }
1721
1722 static inline void fbcon_softback_note(struct vc_data *vc, int t,
1723                                        int count)
1724 {
1725         unsigned short *p;
1726
1727         if (vc->vc_num != fg_console)
1728                 return;
1729         p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1730
1731         while (count) {
1732                 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1733                 count--;
1734                 p = advance_row(p, 1);
1735                 softback_in += vc->vc_size_row;
1736                 if (softback_in == softback_end)
1737                         softback_in = softback_buf;
1738                 if (softback_in == softback_top) {
1739                         softback_top += vc->vc_size_row;
1740                         if (softback_top == softback_end)
1741                                 softback_top = softback_buf;
1742                 }
1743         }
1744         softback_curr = softback_in;
1745 }
1746
1747 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
1748                         int count)
1749 {
1750         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1751         struct display *p = &fb_display[vc->vc_num];
1752         struct fbcon_ops *ops = info->fbcon_par;
1753         int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1754
1755         if (fbcon_is_inactive(vc, info))
1756                 return -EINVAL;
1757
1758         fbcon_cursor(vc, CM_ERASE);
1759
1760         /*
1761          * ++Geert: Only use ywrap/ypan if the console is in text mode
1762          * ++Andrew: Only use ypan on hardware text mode when scrolling the
1763          *           whole screen (prevents flicker).
1764          */
1765
1766         switch (dir) {
1767         case SM_UP:
1768                 if (count > vc->vc_rows)        /* Maximum realistic size */
1769                         count = vc->vc_rows;
1770                 if (softback_top)
1771                         fbcon_softback_note(vc, t, count);
1772                 if (logo_shown >= 0)
1773                         goto redraw_up;
1774                 switch (p->scrollmode) {
1775                 case SCROLL_MOVE:
1776                         ops->bmove(vc, info, t + count, 0, t, 0,
1777                                     b - t - count, vc->vc_cols);
1778                         ops->clear(vc, info, b - count, 0, count,
1779                                   vc->vc_cols);
1780                         break;
1781
1782                 case SCROLL_WRAP_MOVE:
1783                         if (b - t - count > 3 * vc->vc_rows >> 2) {
1784                                 if (t > 0)
1785                                         fbcon_bmove(vc, 0, 0, count, 0, t,
1786                                                     vc->vc_cols);
1787                                 ywrap_up(vc, count);
1788                                 if (vc->vc_rows - b > 0)
1789                                         fbcon_bmove(vc, b - count, 0, b, 0,
1790                                                     vc->vc_rows - b,
1791                                                     vc->vc_cols);
1792                         } else if (info->flags & FBINFO_READS_FAST)
1793                                 fbcon_bmove(vc, t + count, 0, t, 0,
1794                                             b - t - count, vc->vc_cols);
1795                         else
1796                                 goto redraw_up;
1797                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1798                         break;
1799
1800                 case SCROLL_PAN_REDRAW:
1801                         if ((p->yscroll + count <=
1802                              2 * (p->vrows - vc->vc_rows))
1803                             && ((!scroll_partial && (b - t == vc->vc_rows))
1804                                 || (scroll_partial
1805                                     && (b - t - count >
1806                                         3 * vc->vc_rows >> 2)))) {
1807                                 if (t > 0)
1808                                         fbcon_redraw_move(vc, p, 0, t, count);
1809                                 ypan_up_redraw(vc, t, count);
1810                                 if (vc->vc_rows - b > 0)
1811                                         fbcon_redraw_move(vc, p, b,
1812                                                           vc->vc_rows - b, b);
1813                         } else
1814                                 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1815                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1816                         break;
1817
1818                 case SCROLL_PAN_MOVE:
1819                         if ((p->yscroll + count <=
1820                              2 * (p->vrows - vc->vc_rows))
1821                             && ((!scroll_partial && (b - t == vc->vc_rows))
1822                                 || (scroll_partial
1823                                     && (b - t - count >
1824                                         3 * vc->vc_rows >> 2)))) {
1825                                 if (t > 0)
1826                                         fbcon_bmove(vc, 0, 0, count, 0, t,
1827                                                     vc->vc_cols);
1828                                 ypan_up(vc, count);
1829                                 if (vc->vc_rows - b > 0)
1830                                         fbcon_bmove(vc, b - count, 0, b, 0,
1831                                                     vc->vc_rows - b,
1832                                                     vc->vc_cols);
1833                         } else if (info->flags & FBINFO_READS_FAST)
1834                                 fbcon_bmove(vc, t + count, 0, t, 0,
1835                                             b - t - count, vc->vc_cols);
1836                         else
1837                                 goto redraw_up;
1838                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1839                         break;
1840
1841                 case SCROLL_REDRAW:
1842                       redraw_up:
1843                         fbcon_redraw(vc, p, t, b - t - count,
1844                                      count * vc->vc_cols);
1845                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1846                         scr_memsetw((unsigned short *) (vc->vc_origin +
1847                                                         vc->vc_size_row *
1848                                                         (b - count)),
1849                                     vc->vc_video_erase_char,
1850                                     vc->vc_size_row * count);
1851                         return 1;
1852                 }
1853                 break;
1854
1855         case SM_DOWN:
1856                 if (count > vc->vc_rows)        /* Maximum realistic size */
1857                         count = vc->vc_rows;
1858                 if (logo_shown >= 0)
1859                         goto redraw_down;
1860                 switch (p->scrollmode) {
1861                 case SCROLL_MOVE:
1862                         ops->bmove(vc, info, t, 0, t + count, 0,
1863                                     b - t - count, vc->vc_cols);
1864                         ops->clear(vc, info, t, 0, count, vc->vc_cols);
1865                         break;
1866
1867                 case SCROLL_WRAP_MOVE:
1868                         if (b - t - count > 3 * vc->vc_rows >> 2) {
1869                                 if (vc->vc_rows - b > 0)
1870                                         fbcon_bmove(vc, b, 0, b - count, 0,
1871                                                     vc->vc_rows - b,
1872                                                     vc->vc_cols);
1873                                 ywrap_down(vc, count);
1874                                 if (t > 0)
1875                                         fbcon_bmove(vc, count, 0, 0, 0, t,
1876                                                     vc->vc_cols);
1877                         } else if (info->flags & FBINFO_READS_FAST)
1878                                 fbcon_bmove(vc, t, 0, t + count, 0,
1879                                             b - t - count, vc->vc_cols);
1880                         else
1881                                 goto redraw_down;
1882                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1883                         break;
1884
1885                 case SCROLL_PAN_MOVE:
1886                         if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1887                             && ((!scroll_partial && (b - t == vc->vc_rows))
1888                                 || (scroll_partial
1889                                     && (b - t - count >
1890                                         3 * vc->vc_rows >> 2)))) {
1891                                 if (vc->vc_rows - b > 0)
1892                                         fbcon_bmove(vc, b, 0, b - count, 0,
1893                                                     vc->vc_rows - b,
1894                                                     vc->vc_cols);
1895                                 ypan_down(vc, count);
1896                                 if (t > 0)
1897                                         fbcon_bmove(vc, count, 0, 0, 0, t,
1898                                                     vc->vc_cols);
1899                         } else if (info->flags & FBINFO_READS_FAST)
1900                                 fbcon_bmove(vc, t, 0, t + count, 0,
1901                                             b - t - count, vc->vc_cols);
1902                         else
1903                                 goto redraw_down;
1904                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1905                         break;
1906
1907                 case SCROLL_PAN_REDRAW:
1908                         if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1909                             && ((!scroll_partial && (b - t == vc->vc_rows))
1910                                 || (scroll_partial
1911                                     && (b - t - count >
1912                                         3 * vc->vc_rows >> 2)))) {
1913                                 if (vc->vc_rows - b > 0)
1914                                         fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
1915                                                           b - count);
1916                                 ypan_down_redraw(vc, t, count);
1917                                 if (t > 0)
1918                                         fbcon_redraw_move(vc, p, count, t, 0);
1919                         } else
1920                                 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
1921                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1922                         break;
1923
1924                 case SCROLL_REDRAW:
1925                       redraw_down:
1926                         fbcon_redraw(vc, p, b - 1, b - t - count,
1927                                      -count * vc->vc_cols);
1928                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1929                         scr_memsetw((unsigned short *) (vc->vc_origin +
1930                                                         vc->vc_size_row *
1931                                                         t),
1932                                     vc->vc_video_erase_char,
1933                                     vc->vc_size_row * count);
1934                         return 1;
1935                 }
1936         }
1937         return 0;
1938 }
1939
1940
1941 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
1942                         int height, int width)
1943 {
1944         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1945         struct display *p = &fb_display[vc->vc_num];
1946
1947         if (fbcon_is_inactive(vc, info))
1948                 return;
1949
1950         if (!width || !height)
1951                 return;
1952
1953         /*  Split blits that cross physical y_wrap case.
1954          *  Pathological case involves 4 blits, better to use recursive
1955          *  code rather than unrolled case
1956          *
1957          *  Recursive invocations don't need to erase the cursor over and
1958          *  over again, so we use fbcon_bmove_rec()
1959          */
1960         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
1961                         p->vrows - p->yscroll);
1962 }
1963
1964 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
1965                             int dy, int dx, int height, int width, u_int y_break)
1966 {
1967         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1968         struct fbcon_ops *ops = info->fbcon_par;
1969         u_int b;
1970
1971         if (sy < y_break && sy + height > y_break) {
1972                 b = y_break - sy;
1973                 if (dy < sy) {  /* Avoid trashing self */
1974                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1975                                         y_break);
1976                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1977                                         height - b, width, y_break);
1978                 } else {
1979                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1980                                         height - b, width, y_break);
1981                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1982                                         y_break);
1983                 }
1984                 return;
1985         }
1986
1987         if (dy < y_break && dy + height > y_break) {
1988                 b = y_break - dy;
1989                 if (dy < sy) {  /* Avoid trashing self */
1990                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1991                                         y_break);
1992                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1993                                         height - b, width, y_break);
1994                 } else {
1995                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1996                                         height - b, width, y_break);
1997                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1998                                         y_break);
1999                 }
2000                 return;
2001         }
2002         ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
2003                    height, width);
2004 }
2005
2006 static __inline__ void updatescrollmode(struct display *p,
2007                                         struct fb_info *info,
2008                                         struct vc_data *vc)
2009 {
2010         struct fbcon_ops *ops = info->fbcon_par;
2011         int fh = vc->vc_font.height;
2012         int cap = info->flags;
2013         u16 t = 0;
2014         int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
2015                                   info->fix.xpanstep);
2016         int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
2017         int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2018         int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
2019                                    info->var.xres_virtual);
2020         int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
2021                 divides(ypan, vc->vc_font.height) && vyres > yres;
2022         int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
2023                 divides(ywrap, vc->vc_font.height) &&
2024                 divides(vc->vc_font.height, vyres) &&
2025                 divides(vc->vc_font.height, yres);
2026         int reading_fast = cap & FBINFO_READS_FAST;
2027         int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
2028                 !(cap & FBINFO_HWACCEL_DISABLED);
2029         int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
2030                 !(cap & FBINFO_HWACCEL_DISABLED);
2031
2032         p->vrows = vyres/fh;
2033         if (yres > (fh * (vc->vc_rows + 1)))
2034                 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2035         if ((yres % fh) && (vyres % fh < yres % fh))
2036                 p->vrows--;
2037
2038         if (good_wrap || good_pan) {
2039                 if (reading_fast || fast_copyarea)
2040                         p->scrollmode = good_wrap ?
2041                                 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
2042                 else
2043                         p->scrollmode = good_wrap ? SCROLL_REDRAW :
2044                                 SCROLL_PAN_REDRAW;
2045         } else {
2046                 if (reading_fast || (fast_copyarea && !fast_imageblit))
2047                         p->scrollmode = SCROLL_MOVE;
2048                 else
2049                         p->scrollmode = SCROLL_REDRAW;
2050         }
2051 }
2052
2053 static int fbcon_resize(struct vc_data *vc, unsigned int width,
2054                         unsigned int height)
2055 {
2056         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2057         struct fbcon_ops *ops = info->fbcon_par;
2058         struct display *p = &fb_display[vc->vc_num];
2059         struct fb_var_screeninfo var = info->var;
2060         int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2061
2062         virt_w = FBCON_SWAP(ops->rotate, width, height);
2063         virt_h = FBCON_SWAP(ops->rotate, height, width);
2064         virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2065                                  vc->vc_font.height);
2066         virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2067                                  vc->vc_font.width);
2068         var.xres = virt_w * virt_fw;
2069         var.yres = virt_h * virt_fh;
2070         x_diff = info->var.xres - var.xres;
2071         y_diff = info->var.yres - var.yres;
2072         if (x_diff < 0 || x_diff > virt_fw ||
2073             y_diff < 0 || y_diff > virt_fh) {
2074                 struct fb_videomode *mode;
2075
2076                 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2077                 mode = fb_find_best_mode(&var, &info->modelist);
2078                 if (mode == NULL)
2079                         return -EINVAL;
2080                 display_to_var(&var, p);
2081                 fb_videomode_to_var(&var, mode);
2082
2083                 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2084                         return -EINVAL;
2085
2086                 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2087                 if (CON_IS_VISIBLE(vc)) {
2088                         var.activate = FB_ACTIVATE_NOW |
2089                                 FB_ACTIVATE_FORCE;
2090                         fb_set_var(info, &var);
2091                 }
2092                 var_to_display(p, &info->var, info);
2093                 ops->var = info->var;
2094         }
2095         updatescrollmode(p, info, vc);
2096         return 0;
2097 }
2098
2099 static int fbcon_switch(struct vc_data *vc)
2100 {
2101         struct fb_info *info, *old_info = NULL;
2102         struct fbcon_ops *ops;
2103         struct display *p = &fb_display[vc->vc_num];
2104         struct fb_var_screeninfo var;
2105         int i, prev_console, charcnt = 256;
2106
2107         info = registered_fb[con2fb_map[vc->vc_num]];
2108         ops = info->fbcon_par;
2109
2110         if (softback_top) {
2111                 if (softback_lines)
2112                         fbcon_set_origin(vc);
2113                 softback_top = softback_curr = softback_in = softback_buf;
2114                 softback_lines = 0;
2115                 fbcon_update_softback(vc);
2116         }
2117
2118         if (logo_shown >= 0) {
2119                 struct vc_data *conp2 = vc_cons[logo_shown].d;
2120
2121                 if (conp2->vc_top == logo_lines
2122                     && conp2->vc_bottom == conp2->vc_rows)
2123                         conp2->vc_top = 0;
2124                 logo_shown = FBCON_LOGO_CANSHOW;
2125         }
2126
2127         prev_console = ops->currcon;
2128         if (prev_console != -1)
2129                 old_info = registered_fb[con2fb_map[prev_console]];
2130         /*
2131          * FIXME: If we have multiple fbdev's loaded, we need to
2132          * update all info->currcon.  Perhaps, we can place this
2133          * in a centralized structure, but this might break some
2134          * drivers.
2135          *
2136          * info->currcon = vc->vc_num;
2137          */
2138         for (i = 0; i < FB_MAX; i++) {
2139                 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
2140                         struct fbcon_ops *o = registered_fb[i]->fbcon_par;
2141
2142                         o->currcon = vc->vc_num;
2143                 }
2144         }
2145         memset(&var, 0, sizeof(struct fb_var_screeninfo));
2146         display_to_var(&var, p);
2147         var.activate = FB_ACTIVATE_NOW;
2148
2149         /*
2150          * make sure we don't unnecessarily trip the memcmp()
2151          * in fb_set_var()
2152          */
2153         info->var.activate = var.activate;
2154         var.yoffset = info->var.yoffset;
2155         var.xoffset = info->var.xoffset;
2156         var.vmode = info->var.vmode;
2157         fb_set_var(info, &var);
2158         ops->var = info->var;
2159
2160         if (old_info != NULL && (old_info != info ||
2161                                  info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2162                 if (info->fbops->fb_set_par)
2163                         info->fbops->fb_set_par(info);
2164
2165                 if (old_info != info)
2166                         fbcon_del_cursor_timer(old_info);
2167         }
2168
2169         fbcon_add_cursor_timer(info);
2170         set_blitting_type(vc, info);
2171         ops->cursor_reset = 1;
2172
2173         if (ops->rotate_font && ops->rotate_font(info, vc)) {
2174                 ops->rotate = FB_ROTATE_UR;
2175                 set_blitting_type(vc, info);
2176         }
2177
2178         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2179         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2180
2181         if (p->userfont)
2182                 charcnt = FNTCHARCNT(vc->vc_font.data);
2183
2184         if (charcnt > 256)
2185                 vc->vc_complement_mask <<= 1;
2186
2187         updatescrollmode(p, info, vc);
2188
2189         switch (p->scrollmode) {
2190         case SCROLL_WRAP_MOVE:
2191                 scrollback_phys_max = p->vrows - vc->vc_rows;
2192                 break;
2193         case SCROLL_PAN_MOVE:
2194         case SCROLL_PAN_REDRAW:
2195                 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2196                 if (scrollback_phys_max < 0)
2197                         scrollback_phys_max = 0;
2198                 break;
2199         default:
2200                 scrollback_phys_max = 0;
2201                 break;
2202         }
2203
2204         scrollback_max = 0;
2205         scrollback_current = 0;
2206
2207         if (!fbcon_is_inactive(vc, info)) {
2208             ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2209             ops->update_start(info);
2210         }
2211
2212         fbcon_set_palette(vc, color_table);
2213         fbcon_clear_margins(vc, 0);
2214
2215         if (logo_shown == FBCON_LOGO_DRAW) {
2216
2217                 logo_shown = fg_console;
2218                 /* This is protected above by initmem_freed */
2219                 fb_show_logo(info, ops->rotate);
2220                 update_region(vc,
2221                               vc->vc_origin + vc->vc_size_row * vc->vc_top,
2222                               vc->vc_size_row * (vc->vc_bottom -
2223                                                  vc->vc_top) / 2);
2224                 return 0;
2225         }
2226         return 1;
2227 }
2228
2229 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2230                                 int blank)
2231 {
2232         if (blank) {
2233                 unsigned short charmask = vc->vc_hi_font_mask ?
2234                         0x1ff : 0xff;
2235                 unsigned short oldc;
2236
2237                 oldc = vc->vc_video_erase_char;
2238                 vc->vc_video_erase_char &= charmask;
2239                 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2240                 vc->vc_video_erase_char = oldc;
2241         }
2242 }
2243
2244 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2245 {
2246         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2247         struct fbcon_ops *ops = info->fbcon_par;
2248
2249         if (mode_switch) {
2250                 struct fb_var_screeninfo var = info->var;
2251
2252                 ops->graphics = 1;
2253
2254                 if (!blank) {
2255                         if (info->fbops->fb_save_state)
2256                                 info->fbops->fb_save_state(info);
2257                         var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2258                         fb_set_var(info, &var);
2259                         ops->graphics = 0;
2260                         ops->var = info->var;
2261                 } else if (info->fbops->fb_restore_state)
2262                         info->fbops->fb_restore_state(info);
2263         }
2264
2265         if (!fbcon_is_inactive(vc, info)) {
2266                 if (ops->blank_state != blank) {
2267                         ops->blank_state = blank;
2268                         fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2269                         ops->cursor_flash = (!blank);
2270
2271                         if (fb_blank(info, blank))
2272                                 fbcon_generic_blank(vc, info, blank);
2273                 }
2274
2275                 if (!blank)
2276                         update_screen(vc);
2277         }
2278
2279         if (!blank)
2280                 fbcon_add_cursor_timer(info);
2281         else
2282                 fbcon_del_cursor_timer(info);
2283
2284         return 0;
2285 }
2286
2287 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2288 {
2289         u8 *fontdata = vc->vc_font.data;
2290         u8 *data = font->data;
2291         int i, j;
2292
2293         font->width = vc->vc_font.width;
2294         font->height = vc->vc_font.height;
2295         font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2296         if (!font->data)
2297                 return 0;
2298
2299         if (font->width <= 8) {
2300                 j = vc->vc_font.height;
2301                 for (i = 0; i < font->charcount; i++) {
2302                         memcpy(data, fontdata, j);
2303                         memset(data + j, 0, 32 - j);
2304                         data += 32;
2305                         fontdata += j;
2306                 }
2307         } else if (font->width <= 16) {
2308                 j = vc->vc_font.height * 2;
2309                 for (i = 0; i < font->charcount; i++) {
2310                         memcpy(data, fontdata, j);
2311                         memset(data + j, 0, 64 - j);
2312                         data += 64;
2313                         fontdata += j;
2314                 }
2315         } else if (font->width <= 24) {
2316                 for (i = 0; i < font->charcount; i++) {
2317                         for (j = 0; j < vc->vc_font.height; j++) {
2318                                 *data++ = fontdata[0];
2319                                 *data++ = fontdata[1];
2320                                 *data++ = fontdata[2];
2321                                 fontdata += sizeof(u32);
2322                         }
2323                         memset(data, 0, 3 * (32 - j));
2324                         data += 3 * (32 - j);
2325                 }
2326         } else {
2327                 j = vc->vc_font.height * 4;
2328                 for (i = 0; i < font->charcount; i++) {
2329                         memcpy(data, fontdata, j);
2330                         memset(data + j, 0, 128 - j);
2331                         data += 128;
2332                         fontdata += j;
2333                 }
2334         }
2335         return 0;
2336 }
2337
2338 static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2339                              const u8 * data, int userfont)
2340 {
2341         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2342         struct fbcon_ops *ops = info->fbcon_par;
2343         struct display *p = &fb_display[vc->vc_num];
2344         int resize;
2345         int cnt;
2346         char *old_data = NULL;
2347
2348         if (CON_IS_VISIBLE(vc) && softback_lines)
2349                 fbcon_set_origin(vc);
2350
2351         resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2352         if (p->userfont)
2353                 old_data = vc->vc_font.data;
2354         if (userfont)
2355                 cnt = FNTCHARCNT(data);
2356         else
2357                 cnt = 256;
2358         vc->vc_font.data = (void *)(p->fontdata = data);
2359         if ((p->userfont = userfont))
2360                 REFCOUNT(data)++;
2361         vc->vc_font.width = w;
2362         vc->vc_font.height = h;
2363         if (vc->vc_hi_font_mask && cnt == 256) {
2364                 vc->vc_hi_font_mask = 0;
2365                 if (vc->vc_can_do_color) {
2366                         vc->vc_complement_mask >>= 1;
2367                         vc->vc_s_complement_mask >>= 1;
2368                 }
2369
2370                 /* ++Edmund: reorder the attribute bits */
2371                 if (vc->vc_can_do_color) {
2372                         unsigned short *cp =
2373                             (unsigned short *) vc->vc_origin;
2374                         int count = vc->vc_screenbuf_size / 2;
2375                         unsigned short c;
2376                         for (; count > 0; count--, cp++) {
2377                                 c = scr_readw(cp);
2378                                 scr_writew(((c & 0xfe00) >> 1) |
2379                                            (c & 0xff), cp);
2380                         }
2381                         c = vc->vc_video_erase_char;
2382                         vc->vc_video_erase_char =
2383                             ((c & 0xfe00) >> 1) | (c & 0xff);
2384                         vc->vc_attr >>= 1;
2385                 }
2386         } else if (!vc->vc_hi_font_mask && cnt == 512) {
2387                 vc->vc_hi_font_mask = 0x100;
2388                 if (vc->vc_can_do_color) {
2389                         vc->vc_complement_mask <<= 1;
2390                         vc->vc_s_complement_mask <<= 1;
2391                 }
2392
2393                 /* ++Edmund: reorder the attribute bits */
2394                 {
2395                         unsigned short *cp =
2396                             (unsigned short *) vc->vc_origin;
2397                         int count = vc->vc_screenbuf_size / 2;
2398                         unsigned short c;
2399                         for (; count > 0; count--, cp++) {
2400                                 unsigned short newc;
2401                                 c = scr_readw(cp);
2402                                 if (vc->vc_can_do_color)
2403                                         newc =
2404                                             ((c & 0xff00) << 1) | (c &
2405                                                                    0xff);
2406                                 else
2407                                         newc = c & ~0x100;
2408                                 scr_writew(newc, cp);
2409                         }
2410                         c = vc->vc_video_erase_char;
2411                         if (vc->vc_can_do_color) {
2412                                 vc->vc_video_erase_char =
2413                                     ((c & 0xff00) << 1) | (c & 0xff);
2414                                 vc->vc_attr <<= 1;
2415                         } else
2416                                 vc->vc_video_erase_char = c & ~0x100;
2417                 }
2418
2419         }
2420
2421         if (resize) {
2422                 int cols, rows;
2423
2424                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2425                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2426                 cols /= w;
2427                 rows /= h;
2428                 vc_resize(vc, cols, rows);
2429                 if (CON_IS_VISIBLE(vc) && softback_buf)
2430                         fbcon_update_softback(vc);
2431         } else if (CON_IS_VISIBLE(vc)
2432                    && vc->vc_mode == KD_TEXT) {
2433                 fbcon_clear_margins(vc, 0);
2434                 update_screen(vc);
2435         }
2436
2437         if (old_data && (--REFCOUNT(old_data) == 0))
2438                 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2439         return 0;
2440 }
2441
2442 static int fbcon_copy_font(struct vc_data *vc, int con)
2443 {
2444         struct display *od = &fb_display[con];
2445         struct console_font *f = &vc->vc_font;
2446
2447         if (od->fontdata == f->data)
2448                 return 0;       /* already the same font... */
2449         return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2450 }
2451
2452 /*
2453  *  User asked to set font; we are guaranteed that
2454  *      a) width and height are in range 1..32
2455  *      b) charcount does not exceed 512
2456  *  but lets not assume that, since someone might someday want to use larger
2457  *  fonts. And charcount of 512 is small for unicode support.
2458  *
2459  *  However, user space gives the font in 32 rows , regardless of
2460  *  actual font height. So a new API is needed if support for larger fonts
2461  *  is ever implemented.
2462  */
2463
2464 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2465 {
2466         unsigned charcount = font->charcount;
2467         int w = font->width;
2468         int h = font->height;
2469         int size;
2470         int i, csum;
2471         u8 *new_data, *data = font->data;
2472         int pitch = (font->width+7) >> 3;
2473
2474         /* Is there a reason why fbconsole couldn't handle any charcount >256?
2475          * If not this check should be changed to charcount < 256 */
2476         if (charcount != 256 && charcount != 512)
2477                 return -EINVAL;
2478
2479         size = h * pitch * charcount;
2480
2481         new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2482
2483         if (!new_data)
2484                 return -ENOMEM;
2485
2486         new_data += FONT_EXTRA_WORDS * sizeof(int);
2487         FNTSIZE(new_data) = size;
2488         FNTCHARCNT(new_data) = charcount;
2489         REFCOUNT(new_data) = 0; /* usage counter */
2490         for (i=0; i< charcount; i++) {
2491                 memcpy(new_data + i*h*pitch, data +  i*32*pitch, h*pitch);
2492         }
2493
2494         /* Since linux has a nice crc32 function use it for counting font
2495          * checksums. */
2496         csum = crc32(0, new_data, size);
2497
2498         FNTSUM(new_data) = csum;
2499         /* Check if the same font is on some other console already */
2500         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2501                 struct vc_data *tmp = vc_cons[i].d;
2502
2503                 if (fb_display[i].userfont &&
2504                     fb_display[i].fontdata &&
2505                     FNTSUM(fb_display[i].fontdata) == csum &&
2506                     FNTSIZE(fb_display[i].fontdata) == size &&
2507                     tmp->vc_font.width == w &&
2508                     !memcmp(fb_display[i].fontdata, new_data, size)) {
2509                         kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2510                         new_data = (u8 *)fb_display[i].fontdata;
2511                         break;
2512                 }
2513         }
2514         return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2515 }
2516
2517 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2518 {
2519         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2520         const struct font_desc *f;
2521
2522         if (!name)
2523                 f = get_default_font(info->var.xres, info->var.yres);
2524         else if (!(f = find_font(name)))
2525                 return -ENOENT;
2526
2527         font->width = f->width;
2528         font->height = f->height;
2529         return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2530 }
2531
2532 static u16 palette_red[16];
2533 static u16 palette_green[16];
2534 static u16 palette_blue[16];
2535
2536 static struct fb_cmap palette_cmap = {
2537         0, 16, palette_red, palette_green, palette_blue, NULL
2538 };
2539
2540 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
2541 {
2542         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2543         int i, j, k, depth;
2544         u8 val;
2545
2546         if (fbcon_is_inactive(vc, info))
2547                 return -EINVAL;
2548
2549         if (!CON_IS_VISIBLE(vc))
2550                 return 0;
2551
2552         depth = fb_get_color_depth(&info->var, &info->fix);
2553         if (depth > 3) {
2554                 for (i = j = 0; i < 16; i++) {
2555                         k = table[i];
2556                         val = vc->vc_palette[j++];
2557                         palette_red[k] = (val << 8) | val;
2558                         val = vc->vc_palette[j++];
2559                         palette_green[k] = (val << 8) | val;
2560                         val = vc->vc_palette[j++];
2561                         palette_blue[k] = (val << 8) | val;
2562                 }
2563                 palette_cmap.len = 16;
2564                 palette_cmap.start = 0;
2565         /*
2566          * If framebuffer is capable of less than 16 colors,
2567          * use default palette of fbcon.
2568          */
2569         } else
2570                 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2571
2572         return fb_set_cmap(&palette_cmap, info);
2573 }
2574
2575 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2576 {
2577         unsigned long p;
2578         int line;
2579
2580         if (vc->vc_num != fg_console || !softback_lines)
2581                 return (u16 *) (vc->vc_origin + offset);
2582         line = offset / vc->vc_size_row;
2583         if (line >= softback_lines)
2584                 return (u16 *) (vc->vc_origin + offset -
2585                                 softback_lines * vc->vc_size_row);
2586         p = softback_curr + offset;
2587         if (p >= softback_end)
2588                 p += softback_buf - softback_end;
2589         return (u16 *) p;
2590 }
2591
2592 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2593                                  int *px, int *py)
2594 {
2595         unsigned long ret;
2596         int x, y;
2597
2598         if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2599                 unsigned long offset = (pos - vc->vc_origin) / 2;
2600
2601                 x = offset % vc->vc_cols;
2602                 y = offset / vc->vc_cols;
2603                 if (vc->vc_num == fg_console)
2604                         y += softback_lines;
2605                 ret = pos + (vc->vc_cols - x) * 2;
2606         } else if (vc->vc_num == fg_console && softback_lines) {
2607                 unsigned long offset = pos - softback_curr;
2608
2609                 if (pos < softback_curr)
2610                         offset += softback_end - softback_buf;
2611                 offset /= 2;
2612                 x = offset % vc->vc_cols;
2613                 y = offset / vc->vc_cols;
2614                 ret = pos + (vc->vc_cols - x) * 2;
2615                 if (ret == softback_end)
2616                         ret = softback_buf;
2617                 if (ret == softback_in)
2618                         ret = vc->vc_origin;
2619         } else {
2620                 /* Should not happen */
2621                 x = y = 0;
2622                 ret = vc->vc_origin;
2623         }
2624         if (px)
2625                 *px = x;
2626         if (py)
2627                 *py = y;
2628         return ret;
2629 }
2630
2631 /* As we might be inside of softback, we may work with non-contiguous buffer,
2632    that's why we have to use a separate routine. */
2633 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2634 {
2635         while (cnt--) {
2636                 u16 a = scr_readw(p);
2637                 if (!vc->vc_can_do_color)
2638                         a ^= 0x0800;
2639                 else if (vc->vc_hi_font_mask == 0x100)
2640                         a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2641                             (((a) & 0x0e00) << 4);
2642                 else
2643                         a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2644                             (((a) & 0x0700) << 4);
2645                 scr_writew(a, p++);
2646                 if (p == (u16 *) softback_end)
2647                         p = (u16 *) softback_buf;
2648                 if (p == (u16 *) softback_in)
2649                         p = (u16 *) vc->vc_origin;
2650         }
2651 }
2652
2653 static int fbcon_scrolldelta(struct vc_data *vc, int lines)
2654 {
2655         struct fb_info *info = registered_fb[con2fb_map[fg_console]];
2656         struct fbcon_ops *ops = info->fbcon_par;
2657         struct display *p = &fb_display[fg_console];
2658         int offset, limit, scrollback_old;
2659
2660         if (softback_top) {
2661                 if (vc->vc_num != fg_console)
2662                         return 0;
2663                 if (vc->vc_mode != KD_TEXT || !lines)
2664                         return 0;
2665                 if (logo_shown >= 0) {
2666                         struct vc_data *conp2 = vc_cons[logo_shown].d;
2667
2668                         if (conp2->vc_top == logo_lines
2669                             && conp2->vc_bottom == conp2->vc_rows)
2670                                 conp2->vc_top = 0;
2671                         if (logo_shown == vc->vc_num) {
2672                                 unsigned long p, q;
2673                                 int i;
2674
2675                                 p = softback_in;
2676                                 q = vc->vc_origin +
2677                                     logo_lines * vc->vc_size_row;
2678                                 for (i = 0; i < logo_lines; i++) {
2679                                         if (p == softback_top)
2680                                                 break;
2681                                         if (p == softback_buf)
2682                                                 p = softback_end;
2683                                         p -= vc->vc_size_row;
2684                                         q -= vc->vc_size_row;
2685                                         scr_memcpyw((u16 *) q, (u16 *) p,
2686                                                     vc->vc_size_row);
2687                                 }
2688                                 softback_in = softback_curr = p;
2689                                 update_region(vc, vc->vc_origin,
2690                                               logo_lines * vc->vc_cols);
2691                         }
2692                         logo_shown = FBCON_LOGO_CANSHOW;
2693                 }
2694                 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2695                 fbcon_redraw_softback(vc, p, lines);
2696                 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2697                 return 0;
2698         }
2699
2700         if (!scrollback_phys_max)
2701                 return -ENOSYS;
2702
2703         scrollback_old = scrollback_current;
2704         scrollback_current -= lines;
2705         if (scrollback_current < 0)
2706                 scrollback_current = 0;
2707         else if (scrollback_current > scrollback_max)
2708                 scrollback_current = scrollback_max;
2709         if (scrollback_current == scrollback_old)
2710                 return 0;
2711
2712         if (fbcon_is_inactive(vc, info))
2713                 return 0;
2714
2715         fbcon_cursor(vc, CM_ERASE);
2716
2717         offset = p->yscroll - scrollback_current;
2718         limit = p->vrows;
2719         switch (p->scrollmode) {
2720         case SCROLL_WRAP_MOVE:
2721                 info->var.vmode |= FB_VMODE_YWRAP;
2722                 break;
2723         case SCROLL_PAN_MOVE:
2724         case SCROLL_PAN_REDRAW:
2725                 limit -= vc->vc_rows;
2726                 info->var.vmode &= ~FB_VMODE_YWRAP;
2727                 break;
2728         }
2729         if (offset < 0)
2730                 offset += limit;
2731         else if (offset >= limit)
2732                 offset -= limit;
2733
2734         ops->var.xoffset = 0;
2735         ops->var.yoffset = offset * vc->vc_font.height;
2736         ops->update_start(info);
2737
2738         if (!scrollback_current)
2739                 fbcon_cursor(vc, CM_DRAW);
2740         return 0;
2741 }
2742
2743 static int fbcon_set_origin(struct vc_data *vc)
2744 {
2745         if (softback_lines)
2746                 fbcon_scrolldelta(vc, softback_lines);
2747         return 0;
2748 }
2749
2750 static void fbcon_suspended(struct fb_info *info)
2751 {
2752         struct vc_data *vc = NULL;
2753         struct fbcon_ops *ops = info->fbcon_par;
2754
2755         if (!ops || ops->currcon < 0)
2756                 return;
2757         vc = vc_cons[ops->currcon].d;
2758
2759         /* Clear cursor, restore saved data */
2760         fbcon_cursor(vc, CM_ERASE);
2761 }
2762
2763 static void fbcon_resumed(struct fb_info *info)
2764 {
2765         struct vc_data *vc;
2766         struct fbcon_ops *ops = info->fbcon_par;
2767
2768         if (!ops || ops->currcon < 0)
2769                 return;
2770         vc = vc_cons[ops->currcon].d;
2771
2772         update_screen(vc);
2773 }
2774
2775 static void fbcon_modechanged(struct fb_info *info)
2776 {
2777         struct fbcon_ops *ops = info->fbcon_par;
2778         struct vc_data *vc;
2779         struct display *p;
2780         int rows, cols;
2781
2782         if (!ops || ops->currcon < 0)
2783                 return;
2784         vc = vc_cons[ops->currcon].d;
2785         if (vc->vc_mode != KD_TEXT ||
2786             registered_fb[con2fb_map[ops->currcon]] != info)
2787                 return;
2788
2789         p = &fb_display[vc->vc_num];
2790         set_blitting_type(vc, info);
2791
2792         if (CON_IS_VISIBLE(vc)) {
2793                 var_to_display(p, &info->var, info);
2794                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2795                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2796                 cols /= vc->vc_font.width;
2797                 rows /= vc->vc_font.height;
2798                 vc_resize(vc, cols, rows);
2799                 updatescrollmode(p, info, vc);
2800                 scrollback_max = 0;
2801                 scrollback_current = 0;
2802
2803                 if (!fbcon_is_inactive(vc, info)) {
2804                     ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2805                     ops->update_start(info);
2806                 }
2807
2808                 fbcon_set_palette(vc, color_table);
2809                 update_screen(vc);
2810                 if (softback_buf)
2811                         fbcon_update_softback(vc);
2812         }
2813 }
2814
2815 static void fbcon_set_all_vcs(struct fb_info *info)
2816 {
2817         struct fbcon_ops *ops = info->fbcon_par;
2818         struct vc_data *vc;
2819         struct display *p;
2820         int i, rows, cols;
2821
2822         if (!ops || ops->currcon < 0)
2823                 return;
2824
2825         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2826                 vc = vc_cons[i].d;
2827                 if (!vc || vc->vc_mode != KD_TEXT ||
2828                     registered_fb[con2fb_map[i]] != info)
2829                         continue;
2830
2831                 p = &fb_display[vc->vc_num];
2832                 set_blitting_type(vc, info);
2833                 var_to_display(p, &info->var, info);
2834                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2835                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2836                 cols /= vc->vc_font.width;
2837                 rows /= vc->vc_font.height;
2838                 vc_resize(vc, cols, rows);
2839
2840                 if (CON_IS_VISIBLE(vc)) {
2841                         updatescrollmode(p, info, vc);
2842                         scrollback_max = 0;
2843                         scrollback_current = 0;
2844
2845                         if (!fbcon_is_inactive(vc, info)) {
2846                             ops->var.xoffset = ops->var.yoffset =
2847                                 p->yscroll = 0;
2848                             ops->update_start(info);
2849                         }
2850
2851                         fbcon_set_palette(vc, color_table);
2852                         update_screen(vc);
2853                         if (softback_buf)
2854                                 fbcon_update_softback(vc);
2855                 }
2856         }
2857
2858         ops->p = &fb_display[ops->currcon];
2859 }
2860
2861 static int fbcon_mode_deleted(struct fb_info *info,
2862                               struct fb_videomode *mode)
2863 {
2864         struct fb_info *fb_info;
2865         struct display *p;
2866         int i, j, found = 0;
2867
2868         /* before deletion, ensure that mode is not in use */
2869         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2870                 j = con2fb_map[i];
2871                 if (j == -1)
2872                         continue;
2873                 fb_info = registered_fb[j];
2874                 if (fb_info != info)
2875                         continue;
2876                 p = &fb_display[i];
2877                 if (!p || !p->mode)
2878                         continue;
2879                 if (fb_mode_is_equal(p->mode, mode)) {
2880                         found = 1;
2881                         break;
2882                 }
2883         }
2884         return found;
2885 }
2886
2887 static int fbcon_fb_unregistered(int idx)
2888 {
2889         int i;
2890
2891         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2892                 if (con2fb_map[i] == idx)
2893                         con2fb_map[i] = -1;
2894         }
2895
2896         if (idx == info_idx) {
2897                 info_idx = -1;
2898
2899                 for (i = 0; i < FB_MAX; i++) {
2900                         if (registered_fb[i] != NULL) {
2901                                 info_idx = i;
2902                                 break;
2903                         }
2904                 }
2905         }
2906
2907         if (info_idx != -1) {
2908                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2909                         if (con2fb_map[i] == -1)
2910                                 con2fb_map[i] = info_idx;
2911                 }
2912         }
2913
2914         if (!num_registered_fb)
2915                 unregister_con_driver(&fb_con);
2916
2917         return 0;
2918 }
2919
2920 static int fbcon_fb_registered(int idx)
2921 {
2922         int ret = 0, i;
2923
2924         if (info_idx == -1) {
2925                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2926                         if (con2fb_map_boot[i] == idx) {
2927                                 info_idx = idx;
2928                                 break;
2929                         }
2930                 }
2931
2932                 if (info_idx != -1)
2933                         ret = fbcon_takeover(1);
2934         } else {
2935                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2936                         if (con2fb_map_boot[i] == idx &&
2937                             con2fb_map[i] == -1)
2938                                 set_con2fb_map(i, idx, 0);
2939                 }
2940         }
2941
2942         return ret;
2943 }
2944
2945 static void fbcon_fb_blanked(struct fb_info *info, int blank)
2946 {
2947         struct fbcon_ops *ops = info->fbcon_par;
2948         struct vc_data *vc;
2949
2950         if (!ops || ops->currcon < 0)
2951                 return;
2952
2953         vc = vc_cons[ops->currcon].d;
2954         if (vc->vc_mode != KD_TEXT ||
2955                         registered_fb[con2fb_map[ops->currcon]] != info)
2956                 return;
2957
2958         if (CON_IS_VISIBLE(vc)) {
2959                 if (blank)
2960                         do_blank_screen(0);
2961                 else
2962                         do_unblank_screen(0);
2963         }
2964         ops->blank_state = blank;
2965 }
2966
2967 static void fbcon_new_modelist(struct fb_info *info)
2968 {
2969         int i;
2970         struct vc_data *vc;
2971         struct fb_var_screeninfo var;
2972         struct fb_videomode *mode;
2973
2974         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2975                 if (registered_fb[con2fb_map[i]] != info)
2976                         continue;
2977                 if (!fb_display[i].mode)
2978                         continue;
2979                 vc = vc_cons[i].d;
2980                 display_to_var(&var, &fb_display[i]);
2981                 mode = fb_find_nearest_mode(fb_display[i].mode,
2982                                             &info->modelist);
2983                 fb_videomode_to_var(&var, mode);
2984
2985                 if (vc)
2986                         fbcon_set_disp(info, &var, vc);
2987                 else
2988                         fbcon_preset_disp(info, &var, i);
2989
2990         }
2991 }
2992
2993 static int fbcon_event_notify(struct notifier_block *self,
2994                               unsigned long action, void *data)
2995 {
2996         struct fb_event *event = data;
2997         struct fb_info *info = event->info;
2998         struct fb_videomode *mode;
2999         struct fb_con2fbmap *con2fb;
3000         int ret = 0;
3001
3002         /*
3003          * ignore all events except driver registration and deregistration
3004          * if fbcon is not active
3005          */
3006         if (fbcon_has_exited && !(action == FB_EVENT_FB_REGISTERED ||
3007                                   action == FB_EVENT_FB_UNREGISTERED))
3008                 goto done;
3009
3010         switch(action) {
3011         case FB_EVENT_SUSPEND:
3012                 fbcon_suspended(info);
3013                 break;
3014         case FB_EVENT_RESUME:
3015                 fbcon_resumed(info);
3016                 break;
3017         case FB_EVENT_MODE_CHANGE:
3018                 fbcon_modechanged(info);
3019                 break;
3020         case FB_EVENT_MODE_CHANGE_ALL:
3021                 fbcon_set_all_vcs(info);
3022                 break;
3023         case FB_EVENT_MODE_DELETE:
3024                 mode = event->data;
3025                 ret = fbcon_mode_deleted(info, mode);
3026                 break;
3027         case FB_EVENT_FB_REGISTERED:
3028                 ret = fbcon_fb_registered(info->node);
3029                 break;
3030         case FB_EVENT_FB_UNREGISTERED:
3031                 ret = fbcon_fb_unregistered(info->node);
3032                 break;
3033         case FB_EVENT_SET_CONSOLE_MAP:
3034                 con2fb = event->data;
3035                 ret = set_con2fb_map(con2fb->console - 1,
3036                                      con2fb->framebuffer, 1);
3037                 break;
3038         case FB_EVENT_GET_CONSOLE_MAP:
3039                 con2fb = event->data;
3040                 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
3041                 break;
3042         case FB_EVENT_BLANK:
3043                 fbcon_fb_blanked(info, *(int *)event->data);
3044                 break;
3045         case FB_EVENT_NEW_MODELIST:
3046                 fbcon_new_modelist(info);
3047                 break;
3048         }
3049
3050 done:
3051         return ret;
3052 }
3053
3054 /*
3055  *  The console `switch' structure for the frame buffer based console
3056  */
3057
3058 static const struct consw fb_con = {
3059         .owner                  = THIS_MODULE,
3060         .con_startup            = fbcon_startup,
3061         .con_init               = fbcon_init,
3062         .con_deinit             = fbcon_deinit,
3063         .con_clear              = fbcon_clear,
3064         .con_putc               = fbcon_putc,
3065         .con_putcs              = fbcon_putcs,
3066         .con_cursor             = fbcon_cursor,
3067         .con_scroll             = fbcon_scroll,
3068         .con_bmove              = fbcon_bmove,
3069         .con_switch             = fbcon_switch,
3070         .con_blank              = fbcon_blank,
3071         .con_font_set           = fbcon_set_font,
3072         .con_font_get           = fbcon_get_font,
3073         .con_font_default       = fbcon_set_def_font,
3074         .con_font_copy          = fbcon_copy_font,
3075         .con_set_palette        = fbcon_set_palette,
3076         .con_scrolldelta        = fbcon_scrolldelta,
3077         .con_set_origin         = fbcon_set_origin,
3078         .con_invert_region      = fbcon_invert_region,
3079         .con_screen_pos         = fbcon_screen_pos,
3080         .con_getxy              = fbcon_getxy,
3081         .con_resize             = fbcon_resize,
3082 };
3083
3084 static struct notifier_block fbcon_event_notifier = {
3085         .notifier_call  = fbcon_event_notify,
3086 };
3087
3088 static ssize_t store_rotate(struct class_device *class_device,
3089                             const char *buf, size_t count)
3090 {
3091         struct fb_info *info;
3092         int rotate, idx;
3093         char **last = NULL;
3094
3095         if (fbcon_has_exited)
3096                 return count;
3097
3098         acquire_console_sem();
3099         idx = con2fb_map[fg_console];
3100
3101         if (idx == -1 || registered_fb[idx] == NULL)
3102                 goto err;
3103
3104         info = registered_fb[idx];
3105         rotate = simple_strtoul(buf, last, 0);
3106         fbcon_rotate(info, rotate);
3107 err:
3108         release_console_sem();
3109         return count;
3110 }
3111
3112 static ssize_t store_rotate_all(struct class_device *class_device,
3113                                 const char *buf, size_t count)
3114 {
3115         struct fb_info *info;
3116         int rotate, idx;
3117         char **last = NULL;
3118
3119         if (fbcon_has_exited)
3120                 return count;
3121
3122         acquire_console_sem();
3123         idx = con2fb_map[fg_console];
3124
3125         if (idx == -1 || registered_fb[idx] == NULL)
3126                 goto err;
3127
3128         info = registered_fb[idx];
3129         rotate = simple_strtoul(buf, last, 0);
3130         fbcon_rotate_all(info, rotate);
3131 err:
3132         release_console_sem();
3133         return count;
3134 }
3135
3136 static ssize_t show_rotate(struct class_device *class_device, char *buf)
3137 {
3138         struct fb_info *info;
3139         int rotate = 0, idx;
3140
3141         if (fbcon_has_exited)
3142                 return 0;
3143
3144         acquire_console_sem();
3145         idx = con2fb_map[fg_console];
3146
3147         if (idx == -1 || registered_fb[idx] == NULL)
3148                 goto err;
3149
3150         info = registered_fb[idx];
3151         rotate = fbcon_get_rotate(info);
3152 err:
3153         release_console_sem();
3154         return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3155 }
3156
3157 static struct class_device_attribute class_device_attrs[] = {
3158         __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3159         __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3160 };
3161
3162 static int fbcon_init_class_device(void)
3163 {
3164         int i;
3165
3166         for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++)
3167                 class_device_create_file(fbcon_class_device,
3168                                          &class_device_attrs[i]);
3169         return 0;
3170 }
3171
3172 static void fbcon_start(void)
3173 {
3174         if (num_registered_fb) {
3175                 int i;
3176
3177                 acquire_console_sem();
3178
3179                 for (i = 0; i < FB_MAX; i++) {
3180                         if (registered_fb[i] != NULL) {
3181                                 info_idx = i;
3182                                 break;
3183                         }
3184                 }
3185
3186                 release_console_sem();
3187                 fbcon_takeover(0);
3188         }
3189 }
3190
3191 static void fbcon_exit(void)
3192 {
3193         struct fb_info *info;
3194         int i, j, mapped;
3195
3196         if (fbcon_has_exited)
3197                 return;
3198
3199 #ifdef CONFIG_ATARI
3200         free_irq(IRQ_AUTO_4, fb_vbl_handler);
3201 #endif
3202 #ifdef CONFIG_MAC
3203         if (MACH_IS_MAC && vbl_detected)
3204                 free_irq(IRQ_MAC_VBL, fb_vbl_handler);
3205 #endif
3206
3207         kfree((void *)softback_buf);
3208         softback_buf = 0UL;
3209
3210         for (i = 0; i < FB_MAX; i++) {
3211                 mapped = 0;
3212                 info = registered_fb[i];
3213
3214                 if (info == NULL)
3215                         continue;
3216
3217                 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3218                         if (con2fb_map[j] == i)
3219                                 mapped = 1;
3220                 }
3221
3222                 if (mapped) {
3223                         if (info->fbops->fb_release)
3224                                 info->fbops->fb_release(info, 0);
3225                         module_put(info->fbops->owner);
3226
3227                         if (info->fbcon_par) {
3228                                 fbcon_del_cursor_timer(info);
3229                                 kfree(info->fbcon_par);
3230                                 info->fbcon_par = NULL;
3231                         }
3232
3233                         if (info->queue.func == fb_flashcursor)
3234                                 info->queue.func = NULL;
3235                 }
3236         }
3237
3238         fbcon_has_exited = 1;
3239 }
3240
3241 static int __init fb_console_init(void)
3242 {
3243         int i;
3244
3245         acquire_console_sem();
3246         fb_register_client(&fbcon_event_notifier);
3247         fbcon_class_device =
3248             class_device_create(fb_class, NULL, MKDEV(0, 0), NULL, "fbcon");
3249
3250         if (IS_ERR(fbcon_class_device)) {
3251                 printk(KERN_WARNING "Unable to create class_device "
3252                        "for fbcon; errno = %ld\n",
3253                        PTR_ERR(fbcon_class_device));
3254                 fbcon_class_device = NULL;
3255         } else
3256                 fbcon_init_class_device();
3257
3258         for (i = 0; i < MAX_NR_CONSOLES; i++)
3259                 con2fb_map[i] = -1;
3260
3261         release_console_sem();
3262         fbcon_start();
3263         return 0;
3264 }
3265
3266 module_init(fb_console_init);
3267
3268 #ifdef MODULE
3269
3270 static void __exit fbcon_deinit_class_device(void)
3271 {
3272         int i;
3273
3274         for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++)
3275                 class_device_remove_file(fbcon_class_device,
3276                                          &class_device_attrs[i]);
3277 }
3278
3279 static void __exit fb_console_exit(void)
3280 {
3281         acquire_console_sem();
3282         fb_unregister_client(&fbcon_event_notifier);
3283         fbcon_deinit_class_device();
3284         class_device_destroy(fb_class, MKDEV(0, 0));
3285         fbcon_exit();
3286         release_console_sem();
3287         unregister_con_driver(&fb_con);
3288 }
3289
3290 module_exit(fb_console_exit);
3291
3292 #endif
3293
3294 MODULE_LICENSE("GPL");