git.oblomov.eu Git - linux-2.6/blob - drivers/video/console/fbcon.c

   1 /*
   2  *  linux/drivers/video/fbcon.c -- Low level frame buffer based console driver
   3  *
   4  *      Copyright (C) 1995 Geert Uytterhoeven
   5  *
   6  *
   7  *  This file is based on the original Amiga console driver (amicon.c):
   8  *
   9  *      Copyright (C) 1993 Hamish Macdonald
  10  *                         Greg Harp
  11  *      Copyright (C) 1994 David Carter [carter@compsci.bristol.ac.uk]
  12  *
  13  *            with work by William Rucklidge (wjr@cs.cornell.edu)
  14  *                         Geert Uytterhoeven
  15  *                         Jes Sorensen (jds@kom.auc.dk)
  16  *                         Martin Apel
  17  *
  18  *  and on the original Atari console driver (atacon.c):
  19  *
  20  *      Copyright (C) 1993 Bjoern Brauel
  21  *                         Roman Hodek
  22  *
  23  *            with work by Guenther Kelleter
  24  *                         Martin Schaller
  25  *                         Andreas Schwab
  26  *
  27  *  Hardware cursor support added by Emmanuel Marty (core@ggi-project.org)
  28  *  Smart redraw scrolling, arbitrary font width support, 512char font support
  29  *  and software scrollback added by
  30  *                         Jakub Jelinek (jj@ultra.linux.cz)
  31  *
  32  *  Random hacking by Martin Mares <mj@ucw.cz>
  33  *
  34  *      2001 - Documented with DocBook
  35  *      - Brad Douglas <brad@neruo.com>
  36  *
  37  *  The low level operations for the various display memory organizations are
  38  *  now in separate source files.
  39  *
  40  *  Currently the following organizations are supported:
  41  *
  42  *    o afb                     Amiga bitplanes
  43  *    o cfb{2,4,8,16,24,32}     Packed pixels
  44  *    o ilbm                    Amiga interleaved bitplanes
  45  *    o iplan2p[248]            Atari interleaved bitplanes
  46  *    o mfb                     Monochrome
  47  *    o vga                     VGA characters/attributes
  48  *
  49  *  To do:
  50  *
  51  *    - Implement 16 plane mode (iplan2p16)
  52  *
  53  *
  54  *  This file is subject to the terms and conditions of the GNU General Public
  55  *  License.  See the file COPYING in the main directory of this archive for
  56  *  more details.
  57  */
  58
  59 #undef FBCONDEBUG
  60
  61 #include <linux/module.h>
  62 #include <linux/types.h>
  63 #include <linux/fs.h>
  64 #include <linux/kernel.h>
  65 #include <linux/delay.h>        /* MSch: for IRQ probe */
  66 #include <linux/console.h>
  67 #include <linux/string.h>
  68 #include <linux/kd.h>
  69 #include <linux/slab.h>
  70 #include <linux/fb.h>
  71 #include <linux/vt_kern.h>
  72 #include <linux/selection.h>
  73 #include <linux/font.h>
  74 #include <linux/smp.h>
  75 #include <linux/init.h>
  76 #include <linux/interrupt.h>
  77 #include <linux/crc32.h> /* For counting font checksums */
  78 #include <asm/irq.h>
  79 #include <asm/system.h>
  80 #include <asm/uaccess.h>
  81 #ifdef CONFIG_ATARI
  82 #include <asm/atariints.h>
  83 #endif
  84 #ifdef CONFIG_MAC
  85 #include <asm/macints.h>
  86 #endif
  87 #if defined(__mc68000__) || defined(CONFIG_APUS)
  88 #include <asm/machdep.h>
  89 #include <asm/setup.h>
  90 #endif
  91
  92 #include "fbcon.h"
  93
  94 #ifdef FBCONDEBUG
  95 #  define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __FUNCTION__ , ## args)
  96 #else
  97 #  define DPRINTK(fmt, args...)
  98 #endif
  99
 100 enum {
 101         FBCON_LOGO_CANSHOW      = -1,   /* the logo can be shown */
 102         FBCON_LOGO_DRAW         = -2,   /* draw the logo to a console */
 103         FBCON_LOGO_DONTSHOW     = -3    /* do not show the logo */
 104 };
 105
 106 static struct display fb_display[MAX_NR_CONSOLES];
 107
 108 static signed char con2fb_map[MAX_NR_CONSOLES];
 109 static signed char con2fb_map_boot[MAX_NR_CONSOLES];
 110 static int logo_height;
 111 static int logo_lines;
 112 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
 113    enums.  */
 114 static int logo_shown = FBCON_LOGO_CANSHOW;
 115 /* Software scrollback */
 116 static int fbcon_softback_size = 32768;
 117 static unsigned long softback_buf, softback_curr;
 118 static unsigned long softback_in;
 119 static unsigned long softback_top, softback_end;
 120 static int softback_lines;
 121 /* console mappings */
 122 static int first_fb_vc;
 123 static int last_fb_vc = MAX_NR_CONSOLES - 1;
 124 static int fbcon_is_default = 1;
 125 static int fbcon_has_exited;
 126
 127 /* font data */
 128 static char fontname[40];
 129
 130 /* current fb_info */
 131 static int info_idx = -1;
 132
 133 /* console rotation */
 134 static int rotate;
 135 static int fbcon_has_sysfs;
 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)
 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(struct work_struct *work)
 386 {
 387         struct fb_info *info = container_of(work, struct fb_info, queue);
 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             registered_fb[con2fb_map[vc->vc_num]] != info ||
 400             vc->vc_deccm != 1) {
 401                 release_console_sem();
 402                 return;
 403         }
 404
 405         p = &fb_display[vc->vc_num];
 406         c = scr_readw((u16 *) vc->vc_pos);
 407         mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
 408                 CM_ERASE : CM_DRAW;
 409         ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
 410                     get_color(vc, info, c, 0));
 411         release_console_sem();
 412 }
 413
 414 #if defined(CONFIG_ATARI) || defined(CONFIG_MAC)
 415 static int cursor_blink_rate;
 416 static irqreturn_t fb_vbl_handler(int irq, void *dev_id)
 417 {
 418         struct fb_info *info = dev_id;
 419
 420         if (vbl_cursor_cnt && --vbl_cursor_cnt == 0) {
 421                 schedule_work(&info->queue);
 422                 vbl_cursor_cnt = cursor_blink_rate;
 423         }
 424         return IRQ_HANDLED;
 425 }
 426 #endif
 427
 428 static void cursor_timer_handler(unsigned long dev_addr)
 429 {
 430         struct fb_info *info = (struct fb_info *) dev_addr;
 431         struct fbcon_ops *ops = info->fbcon_par;
 432
 433         schedule_work(&info->queue);
 434         mod_timer(&ops->cursor_timer, jiffies + HZ/5);
 435 }
 436
 437 static void fbcon_add_cursor_timer(struct fb_info *info)
 438 {
 439         struct fbcon_ops *ops = info->fbcon_par;
 440
 441         if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
 442             !(ops->flags & FBCON_FLAGS_CURSOR_TIMER)) {
 443                 if (!info->queue.func)
 444                         INIT_WORK(&info->queue, fb_flashcursor);
 445
 446                 init_timer(&ops->cursor_timer);
 447                 ops->cursor_timer.function = cursor_timer_handler;
 448                 ops->cursor_timer.expires = jiffies + HZ / 5;
 449                 ops->cursor_timer.data = (unsigned long ) info;
 450                 add_timer(&ops->cursor_timer);
 451                 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
 452         }
 453 }
 454
 455 static void fbcon_del_cursor_timer(struct fb_info *info)
 456 {
 457         struct fbcon_ops *ops = info->fbcon_par;
 458
 459         if (info->queue.func == fb_flashcursor &&
 460             ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
 461                 del_timer_sync(&ops->cursor_timer);
 462                 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
 463         }
 464 }
 465
 466 #ifndef MODULE
 467 static int __init fb_console_setup(char *this_opt)
 468 {
 469         char *options;
 470         int i, j;
 471
 472         if (!this_opt || !*this_opt)
 473                 return 1;
 474
 475         while ((options = strsep(&this_opt, ",")) != NULL) {
 476                 if (!strncmp(options, "font:", 5))
 477                         strcpy(fontname, options + 5);
 478
 479                 if (!strncmp(options, "scrollback:", 11)) {
 480                         options += 11;
 481                         if (*options) {
 482                                 fbcon_softback_size = simple_strtoul(options, &options, 0);
 483                                 if (*options == 'k' || *options == 'K') {
 484                                         fbcon_softback_size *= 1024;
 485                                         options++;
 486                                 }
 487                                 if (*options != ',')
 488                                         return 1;
 489                                 options++;
 490                         } else
 491                                 return 1;
 492                 }
 493
 494                 if (!strncmp(options, "map:", 4)) {
 495                         options += 4;
 496                         if (*options)
 497                                 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
 498                                         if (!options[j])
 499                                                 j = 0;
 500                                         con2fb_map_boot[i] =
 501                                                 (options[j++]-'0') % FB_MAX;
 502                                 }
 503                         return 1;
 504                 }
 505
 506                 if (!strncmp(options, "vc:", 3)) {
 507                         options += 3;
 508                         if (*options)
 509                                 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
 510                         if (first_fb_vc < 0)
 511                                 first_fb_vc = 0;
 512                         if (*options++ == '-')
 513                                 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
 514                         fbcon_is_default = 0;
 515                 }
 516
 517                 if (!strncmp(options, "rotate:", 7)) {
 518                         options += 7;
 519                         if (*options)
 520                                 rotate = simple_strtoul(options, &options, 0);
 521                         if (rotate > 3)
 522                                 rotate = 0;
 523                 }
 524         }
 525         return 1;
 526 }
 527
 528 __setup("fbcon=", fb_console_setup);
 529 #endif
 530
 531 static int search_fb_in_map(int idx)
 532 {
 533         int i, retval = 0;
 534
 535         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 536                 if (con2fb_map[i] == idx)
 537                         retval = 1;
 538         }
 539         return retval;
 540 }
 541
 542 static int search_for_mapped_con(void)
 543 {
 544         int i, retval = 0;
 545
 546         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 547                 if (con2fb_map[i] != -1)
 548                         retval = 1;
 549         }
 550         return retval;
 551 }
 552
 553 static int fbcon_takeover(int show_logo)
 554 {
 555         int err, i;
 556
 557         if (!num_registered_fb)
 558                 return -ENODEV;
 559
 560         if (!show_logo)
 561                 logo_shown = FBCON_LOGO_DONTSHOW;
 562
 563         for (i = first_fb_vc; i <= last_fb_vc; i++)
 564                 con2fb_map[i] = info_idx;
 565
 566         err = take_over_console(&fb_con, first_fb_vc, last_fb_vc,
 567                                 fbcon_is_default);
 568
 569         if (err) {
 570                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
 571                         con2fb_map[i] = -1;
 572                 }
 573                 info_idx = -1;
 574         }
 575
 576         return err;
 577 }
 578
 579 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
 580                                int cols, int rows, int new_cols, int new_rows)
 581 {
 582         /* Need to make room for the logo */
 583         struct fbcon_ops *ops = info->fbcon_par;
 584         int cnt, erase = vc->vc_video_erase_char, step;
 585         unsigned short *save = NULL, *r, *q;
 586
 587         /*
 588          * remove underline attribute from erase character
 589          * if black and white framebuffer.
 590          */
 591         if (fb_get_color_depth(&info->var, &info->fix) == 1)
 592                 erase &= ~0x400;
 593         logo_height = fb_prepare_logo(info, ops->rotate);
 594         logo_lines = (logo_height + vc->vc_font.height - 1) /
 595                 vc->vc_font.height;
 596         q = (unsigned short *) (vc->vc_origin +
 597                                 vc->vc_size_row * rows);
 598         step = logo_lines * cols;
 599         for (r = q - logo_lines * cols; r < q; r++)
 600                 if (scr_readw(r) != vc->vc_video_erase_char)
 601                         break;
 602         if (r != q && new_rows >= rows + logo_lines) {
 603                 save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
 604                 if (save) {
 605                         int i = cols < new_cols ? cols : new_cols;
 606                         scr_memsetw(save, erase, logo_lines * new_cols * 2);
 607                         r = q - step;
 608                         for (cnt = 0; cnt < logo_lines; cnt++, r += i)
 609                                 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
 610                         r = q;
 611                 }
 612         }
 613         if (r == q) {
 614                 /* We can scroll screen down */
 615                 r = q - step - cols;
 616                 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
 617                         scr_memcpyw(r + step, r, vc->vc_size_row);
 618                         r -= cols;
 619                 }
 620                 if (!save) {
 621                         vc->vc_y += logo_lines;
 622                         vc->vc_pos += logo_lines * vc->vc_size_row;
 623                 }
 624         }
 625         scr_memsetw((unsigned short *) vc->vc_origin,
 626                     erase,
 627                     vc->vc_size_row * logo_lines);
 628
 629         if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
 630                 fbcon_clear_margins(vc, 0);
 631                 update_screen(vc);
 632         }
 633
 634         if (save) {
 635                 q = (unsigned short *) (vc->vc_origin +
 636                                         vc->vc_size_row *
 637                                         rows);
 638                 scr_memcpyw(q, save, logo_lines * new_cols * 2);
 639                 vc->vc_y += logo_lines;
 640                 vc->vc_pos += logo_lines * vc->vc_size_row;
 641                 kfree(save);
 642         }
 643
 644         if (logo_lines > vc->vc_bottom) {
 645                 logo_shown = FBCON_LOGO_CANSHOW;
 646                 printk(KERN_INFO
 647                        "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
 648         } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
 649                 logo_shown = FBCON_LOGO_DRAW;
 650                 vc->vc_top = logo_lines;
 651         }
 652 }
 653
 654 #ifdef CONFIG_FB_TILEBLITTING
 655 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
 656 {
 657         struct fbcon_ops *ops = info->fbcon_par;
 658
 659         ops->p = &fb_display[vc->vc_num];
 660
 661         if ((info->flags & FBINFO_MISC_TILEBLITTING))
 662                 fbcon_set_tileops(vc, info);
 663         else {
 664                 fbcon_set_rotation(info);
 665                 fbcon_set_bitops(ops);
 666         }
 667 }
 668 #else
 669 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
 670 {
 671         struct fbcon_ops *ops = info->fbcon_par;
 672
 673         info->flags &= ~FBINFO_MISC_TILEBLITTING;
 674         ops->p = &fb_display[vc->vc_num];
 675         fbcon_set_rotation(info);
 676         fbcon_set_bitops(ops);
 677 }
 678 #endif /* CONFIG_MISC_TILEBLITTING */
 679
 680
 681 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
 682                                   int unit, int oldidx)
 683 {
 684         struct fbcon_ops *ops = NULL;
 685         int err = 0;
 686
 687         if (!try_module_get(info->fbops->owner))
 688                 err = -ENODEV;
 689
 690         if (!err && info->fbops->fb_open &&
 691             info->fbops->fb_open(info, 0))
 692                 err = -ENODEV;
 693
 694         if (!err) {
 695                 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
 696                 if (!ops)
 697                         err = -ENOMEM;
 698         }
 699
 700         if (!err) {
 701                 info->fbcon_par = ops;
 702                 set_blitting_type(vc, info);
 703         }
 704
 705         if (err) {
 706                 con2fb_map[unit] = oldidx;
 707                 module_put(info->fbops->owner);
 708         }
 709
 710         return err;
 711 }
 712
 713 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
 714                                   struct fb_info *newinfo, int unit,
 715                                   int oldidx, int found)
 716 {
 717         struct fbcon_ops *ops = oldinfo->fbcon_par;
 718         int err = 0;
 719
 720         if (oldinfo->fbops->fb_release &&
 721             oldinfo->fbops->fb_release(oldinfo, 0)) {
 722                 con2fb_map[unit] = oldidx;
 723                 if (!found && newinfo->fbops->fb_release)
 724                         newinfo->fbops->fb_release(newinfo, 0);
 725                 if (!found)
 726                         module_put(newinfo->fbops->owner);
 727                 err = -ENODEV;
 728         }
 729
 730         if (!err) {
 731                 fbcon_del_cursor_timer(oldinfo);
 732                 kfree(ops->cursor_state.mask);
 733                 kfree(ops->cursor_data);
 734                 kfree(ops->fontbuffer);
 735                 kfree(oldinfo->fbcon_par);
 736                 oldinfo->fbcon_par = NULL;
 737                 module_put(oldinfo->fbops->owner);
 738                 /*
 739                   If oldinfo and newinfo are driving the same hardware,
 740                   the fb_release() method of oldinfo may attempt to
 741                   restore the hardware state.  This will leave the
 742                   newinfo in an undefined state. Thus, a call to
 743                   fb_set_par() may be needed for the newinfo.
 744                 */
 745                 if (newinfo->fbops->fb_set_par)
 746                         newinfo->fbops->fb_set_par(newinfo);
 747         }
 748
 749         return err;
 750 }
 751
 752 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
 753                                 int unit, int show_logo)
 754 {
 755         struct fbcon_ops *ops = info->fbcon_par;
 756
 757         ops->currcon = fg_console;
 758
 759         if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT))
 760                 info->fbops->fb_set_par(info);
 761
 762         ops->flags |= FBCON_FLAGS_INIT;
 763         ops->graphics = 0;
 764
 765         if (vc)
 766                 fbcon_set_disp(info, &info->var, vc);
 767         else
 768                 fbcon_preset_disp(info, &info->var, unit);
 769
 770         if (show_logo) {
 771                 struct vc_data *fg_vc = vc_cons[fg_console].d;
 772                 struct fb_info *fg_info =
 773                         registered_fb[con2fb_map[fg_console]];
 774
 775                 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
 776                                    fg_vc->vc_rows, fg_vc->vc_cols,
 777                                    fg_vc->vc_rows);
 778         }
 779
 780         update_screen(vc_cons[fg_console].d);
 781 }
 782
 783 /**
 784  *      set_con2fb_map - map console to frame buffer device
 785  *      @unit: virtual console number to map
 786  *      @newidx: frame buffer index to map virtual console to
 787  *      @user: user request
 788  *
 789  *      Maps a virtual console @unit to a frame buffer device
 790  *      @newidx.
 791  */
 792 static int set_con2fb_map(int unit, int newidx, int user)
 793 {
 794         struct vc_data *vc = vc_cons[unit].d;
 795         int oldidx = con2fb_map[unit];
 796         struct fb_info *info = registered_fb[newidx];
 797         struct fb_info *oldinfo = NULL;
 798         int found, err = 0;
 799
 800         if (oldidx == newidx)
 801                 return 0;
 802
 803         if (!info || fbcon_has_exited)
 804                 return -EINVAL;
 805
 806         if (!err && !search_for_mapped_con()) {
 807                 info_idx = newidx;
 808                 return fbcon_takeover(0);
 809         }
 810
 811         if (oldidx != -1)
 812                 oldinfo = registered_fb[oldidx];
 813
 814         found = search_fb_in_map(newidx);
 815
 816         acquire_console_sem();
 817         con2fb_map[unit] = newidx;
 818         if (!err && !found)
 819                 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
 820
 821
 822         /*
 823          * If old fb is not mapped to any of the consoles,
 824          * fbcon should release it.
 825          */
 826         if (!err && oldinfo && !search_fb_in_map(oldidx))
 827                 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
 828                                              found);
 829
 830         if (!err) {
 831                 int show_logo = (fg_console == 0 && !user &&
 832                                  logo_shown != FBCON_LOGO_DONTSHOW);
 833
 834                 if (!found)
 835                         fbcon_add_cursor_timer(info);
 836                 con2fb_map_boot[unit] = newidx;
 837                 con2fb_init_display(vc, info, unit, show_logo);
 838         }
 839
 840         if (!search_fb_in_map(info_idx))
 841                 info_idx = newidx;
 842
 843         release_console_sem();
 844         return err;
 845 }
 846
 847 /*
 848  *  Low Level Operations
 849  */
 850 /* NOTE: fbcon cannot be __init: it may be called from take_over_console later */
 851 static int var_to_display(struct display *disp,
 852                           struct fb_var_screeninfo *var,
 853                           struct fb_info *info)
 854 {
 855         disp->xres_virtual = var->xres_virtual;
 856         disp->yres_virtual = var->yres_virtual;
 857         disp->bits_per_pixel = var->bits_per_pixel;
 858         disp->grayscale = var->grayscale;
 859         disp->nonstd = var->nonstd;
 860         disp->accel_flags = var->accel_flags;
 861         disp->height = var->height;
 862         disp->width = var->width;
 863         disp->red = var->red;
 864         disp->green = var->green;
 865         disp->blue = var->blue;
 866         disp->transp = var->transp;
 867         disp->rotate = var->rotate;
 868         disp->mode = fb_match_mode(var, &info->modelist);
 869         if (disp->mode == NULL)
 870                 /* This should not happen */
 871                 return -EINVAL;
 872         return 0;
 873 }
 874
 875 static void display_to_var(struct fb_var_screeninfo *var,
 876                            struct display *disp)
 877 {
 878         fb_videomode_to_var(var, disp->mode);
 879         var->xres_virtual = disp->xres_virtual;
 880         var->yres_virtual = disp->yres_virtual;
 881         var->bits_per_pixel = disp->bits_per_pixel;
 882         var->grayscale = disp->grayscale;
 883         var->nonstd = disp->nonstd;
 884         var->accel_flags = disp->accel_flags;
 885         var->height = disp->height;
 886         var->width = disp->width;
 887         var->red = disp->red;
 888         var->green = disp->green;
 889         var->blue = disp->blue;
 890         var->transp = disp->transp;
 891         var->rotate = disp->rotate;
 892 }
 893
 894 static const char *fbcon_startup(void)
 895 {
 896         const char *display_desc = "frame buffer device";
 897         struct display *p = &fb_display[fg_console];
 898         struct vc_data *vc = vc_cons[fg_console].d;
 899         const struct font_desc *font = NULL;
 900         struct module *owner;
 901         struct fb_info *info = NULL;
 902         struct fbcon_ops *ops;
 903         int rows, cols;
 904         int irqres;
 905
 906         irqres = 1;
 907         /*
 908          *  If num_registered_fb is zero, this is a call for the dummy part.
 909          *  The frame buffer devices weren't initialized yet.
 910          */
 911         if (!num_registered_fb || info_idx == -1)
 912                 return display_desc;
 913         /*
 914          * Instead of blindly using registered_fb[0], we use info_idx, set by
 915          * fb_console_init();
 916          */
 917         info = registered_fb[info_idx];
 918         if (!info)
 919                 return NULL;
 920
 921         owner = info->fbops->owner;
 922         if (!try_module_get(owner))
 923                 return NULL;
 924         if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
 925                 module_put(owner);
 926                 return NULL;
 927         }
 928
 929         ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
 930         if (!ops) {
 931                 module_put(owner);
 932                 return NULL;
 933         }
 934
 935         ops->currcon = -1;
 936         ops->graphics = 1;
 937         ops->cur_rotate = -1;
 938         info->fbcon_par = ops;
 939         p->con_rotate = rotate;
 940         set_blitting_type(vc, info);
 941
 942         if (info->fix.type != FB_TYPE_TEXT) {
 943                 if (fbcon_softback_size) {
 944                         if (!softback_buf) {
 945                                 softback_buf =
 946                                     (unsigned long)
 947                                     kmalloc(fbcon_softback_size,
 948                                             GFP_KERNEL);
 949                                 if (!softback_buf) {
 950                                         fbcon_softback_size = 0;
 951                                         softback_top = 0;
 952                                 }
 953                         }
 954                 } else {
 955                         if (softback_buf) {
 956                                 kfree((void *) softback_buf);
 957                                 softback_buf = 0;
 958                                 softback_top = 0;
 959                         }
 960                 }
 961                 if (softback_buf)
 962                         softback_in = softback_top = softback_curr =
 963                             softback_buf;
 964                 softback_lines = 0;
 965         }
 966
 967         /* Setup default font */
 968         if (!p->fontdata) {
 969                 if (!fontname[0] || !(font = find_font(fontname)))
 970                         font = get_default_font(info->var.xres,
 971                                                 info->var.yres);
 972                 vc->vc_font.width = font->width;
 973                 vc->vc_font.height = font->height;
 974                 vc->vc_font.data = (void *)(p->fontdata = font->data);
 975                 vc->vc_font.charcount = 256; /* FIXME  Need to support more fonts */
 976         }
 977
 978         cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
 979         rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
 980         cols /= vc->vc_font.width;
 981         rows /= vc->vc_font.height;
 982         vc_resize(vc, cols, rows);
 983
 984         DPRINTK("mode:   %s\n", info->fix.id);
 985         DPRINTK("visual: %d\n", info->fix.visual);
 986         DPRINTK("res:    %dx%d-%d\n", info->var.xres,
 987                 info->var.yres,
 988                 info->var.bits_per_pixel);
 989
 990 #ifdef CONFIG_ATARI
 991         if (MACH_IS_ATARI) {
 992                 cursor_blink_rate = ATARI_CURSOR_BLINK_RATE;
 993                 irqres =
 994                     request_irq(IRQ_AUTO_4, fb_vbl_handler,
 995                                 IRQ_TYPE_PRIO, "framebuffer vbl",
 996                                 info);
 997         }
 998 #endif                          /* CONFIG_ATARI */
 999
1000 #ifdef CONFIG_MAC
1001         /*
1002          * On a Macintoy, the VBL interrupt may or may not be active.
1003          * As interrupt based cursor is more reliable and race free, we
1004          * probe for VBL interrupts.
1005          */
1006         if (MACH_IS_MAC) {
1007                 int ct = 0;
1008                 /*
1009                  * Probe for VBL: set temp. handler ...
1010                  */
1011                 irqres = request_irq(IRQ_MAC_VBL, fb_vbl_detect, 0,
1012                                      "framebuffer vbl", info);
1013                 vbl_detected = 0;
1014
1015                 /*
1016                  * ... and spin for 20 ms ...
1017                  */
1018                 while (!vbl_detected && ++ct < 1000)
1019                         udelay(20);
1020
1021                 if (ct == 1000)
1022                         printk
1023                             ("fbcon_startup: No VBL detected, using timer based cursor.\n");
1024
1025                 free_irq(IRQ_MAC_VBL, fb_vbl_detect);
1026
1027                 if (vbl_detected) {
1028                         /*
1029                          * interrupt based cursor ok
1030                          */
1031                         cursor_blink_rate = MAC_CURSOR_BLINK_RATE;
1032                         irqres =
1033                             request_irq(IRQ_MAC_VBL, fb_vbl_handler, 0,
1034                                         "framebuffer vbl", info);
1035                 } else {
1036                         /*
1037                          * VBL not detected: fall through, use timer based cursor
1038                          */
1039                         irqres = 1;
1040                 }
1041         }
1042 #endif                          /* CONFIG_MAC */
1043
1044         fbcon_add_cursor_timer(info);
1045         fbcon_has_exited = 0;
1046         return display_desc;
1047 }
1048
1049 static void fbcon_init(struct vc_data *vc, int init)
1050 {
1051         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1052         struct fbcon_ops *ops;
1053         struct vc_data **default_mode = vc->vc_display_fg;
1054         struct vc_data *svc = *default_mode;
1055         struct display *t, *p = &fb_display[vc->vc_num];
1056         int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
1057         int cap;
1058
1059         if (info_idx == -1 || info == NULL)
1060             return;
1061
1062         cap = info->flags;
1063
1064         if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1065             (info->fix.type == FB_TYPE_TEXT))
1066                 logo = 0;
1067
1068         if (var_to_display(p, &info->var, info))
1069                 return;
1070
1071         /* If we are not the first console on this
1072            fb, copy the font from that console */
1073         t = &fb_display[fg_console];
1074         if (!p->fontdata) {
1075                 if (t->fontdata) {
1076                         struct vc_data *fvc = vc_cons[fg_console].d;
1077
1078                         vc->vc_font.data = (void *)(p->fontdata =
1079                                                     fvc->vc_font.data);
1080                         vc->vc_font.width = fvc->vc_font.width;
1081                         vc->vc_font.height = fvc->vc_font.height;
1082                         p->userfont = t->userfont;
1083
1084                         if (p->userfont)
1085                                 REFCOUNT(p->fontdata)++;
1086                 } else {
1087                         const struct font_desc *font = NULL;
1088
1089                         if (!fontname[0] || !(font = find_font(fontname)))
1090                                 font = get_default_font(info->var.xres,
1091                                                         info->var.yres);
1092                         vc->vc_font.width = font->width;
1093                         vc->vc_font.height = font->height;
1094                         vc->vc_font.data = (void *)(p->fontdata = font->data);
1095                         vc->vc_font.charcount = 256; /* FIXME  Need to
1096                                                         support more fonts */
1097                 }
1098         }
1099
1100         if (p->userfont)
1101                 charcnt = FNTCHARCNT(p->fontdata);
1102
1103         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1104         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1105         if (charcnt == 256) {
1106                 vc->vc_hi_font_mask = 0;
1107         } else {
1108                 vc->vc_hi_font_mask = 0x100;
1109                 if (vc->vc_can_do_color)
1110                         vc->vc_complement_mask <<= 1;
1111         }
1112
1113         if (!*svc->vc_uni_pagedir_loc)
1114                 con_set_default_unimap(svc);
1115         if (!*vc->vc_uni_pagedir_loc)
1116                 con_copy_unimap(vc, svc);
1117
1118         ops = info->fbcon_par;
1119         p->con_rotate = rotate;
1120         set_blitting_type(vc, info);
1121
1122         cols = vc->vc_cols;
1123         rows = vc->vc_rows;
1124         new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1125         new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1126         new_cols /= vc->vc_font.width;
1127         new_rows /= vc->vc_font.height;
1128         vc_resize(vc, new_cols, new_rows);
1129
1130         /*
1131          * We must always set the mode. The mode of the previous console
1132          * driver could be in the same resolution but we are using different
1133          * hardware so we have to initialize the hardware.
1134          *
1135          * We need to do it in fbcon_init() to prevent screen corruption.
1136          */
1137         if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
1138                 if (info->fbops->fb_set_par &&
1139                     !(ops->flags & FBCON_FLAGS_INIT))
1140                         info->fbops->fb_set_par(info);
1141                 ops->flags |= FBCON_FLAGS_INIT;
1142         }
1143
1144         ops->graphics = 0;
1145
1146         if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1147             !(cap & FBINFO_HWACCEL_DISABLED))
1148                 p->scrollmode = SCROLL_MOVE;
1149         else /* default to something safe */
1150                 p->scrollmode = SCROLL_REDRAW;
1151
1152         /*
1153          *  ++guenther: console.c:vc_allocate() relies on initializing
1154          *  vc_{cols,rows}, but we must not set those if we are only
1155          *  resizing the console.
1156          */
1157         if (!init) {
1158                 vc->vc_cols = new_cols;
1159                 vc->vc_rows = new_rows;
1160         }
1161
1162         if (logo)
1163                 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1164
1165         if (vc == svc && softback_buf)
1166                 fbcon_update_softback(vc);
1167
1168         if (ops->rotate_font && ops->rotate_font(info, vc)) {
1169                 ops->rotate = FB_ROTATE_UR;
1170                 set_blitting_type(vc, info);
1171         }
1172
1173         ops->p = &fb_display[fg_console];
1174 }
1175
1176 static void fbcon_free_font(struct display *p)
1177 {
1178         if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1179                 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1180         p->fontdata = NULL;
1181         p->userfont = 0;
1182 }
1183
1184 static void fbcon_deinit(struct vc_data *vc)
1185 {
1186         struct display *p = &fb_display[vc->vc_num];
1187         struct fb_info *info;
1188         struct fbcon_ops *ops;
1189         int idx;
1190
1191         fbcon_free_font(p);
1192         idx = con2fb_map[vc->vc_num];
1193
1194         if (idx == -1)
1195                 goto finished;
1196
1197         info = registered_fb[idx];
1198
1199         if (!info)
1200                 goto finished;
1201
1202         ops = info->fbcon_par;
1203
1204         if (!ops)
1205                 goto finished;
1206
1207         if (CON_IS_VISIBLE(vc))
1208                 fbcon_del_cursor_timer(info);
1209
1210         ops->flags &= ~FBCON_FLAGS_INIT;
1211 finished:
1212
1213         if (!con_is_bound(&fb_con))
1214                 fbcon_exit();
1215
1216         return;
1217 }
1218
1219 /* ====================================================================== */
1220
1221 /*  fbcon_XXX routines - interface used by the world
1222  *
1223  *  This system is now divided into two levels because of complications
1224  *  caused by hardware scrolling. Top level functions:
1225  *
1226  *      fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1227  *
1228  *  handles y values in range [0, scr_height-1] that correspond to real
1229  *  screen positions. y_wrap shift means that first line of bitmap may be
1230  *  anywhere on this display. These functions convert lineoffsets to
1231  *  bitmap offsets and deal with the wrap-around case by splitting blits.
1232  *
1233  *      fbcon_bmove_physical_8()    -- These functions fast implementations
1234  *      fbcon_clear_physical_8()    -- of original fbcon_XXX fns.
1235  *      fbcon_putc_physical_8()     -- (font width != 8) may be added later
1236  *
1237  *  WARNING:
1238  *
1239  *  At the moment fbcon_putc() cannot blit across vertical wrap boundary
1240  *  Implies should only really hardware scroll in rows. Only reason for
1241  *  restriction is simplicity & efficiency at the moment.
1242  */
1243
1244 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1245                         int width)
1246 {
1247         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1248         struct fbcon_ops *ops = info->fbcon_par;
1249
1250         struct display *p = &fb_display[vc->vc_num];
1251         u_int y_break;
1252
1253         if (fbcon_is_inactive(vc, info))
1254                 return;
1255
1256         if (!height || !width)
1257                 return;
1258
1259         /* Split blits that cross physical y_wrap boundary */
1260
1261         y_break = p->vrows - p->yscroll;
1262         if (sy < y_break && sy + height - 1 >= y_break) {
1263                 u_int b = y_break - sy;
1264                 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1265                 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1266                                  width);
1267         } else
1268                 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1269 }
1270
1271 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1272                         int count, int ypos, int xpos)
1273 {
1274         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1275         struct display *p = &fb_display[vc->vc_num];
1276         struct fbcon_ops *ops = info->fbcon_par;
1277
1278         if (!fbcon_is_inactive(vc, info))
1279                 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1280                            get_color(vc, info, scr_readw(s), 1),
1281                            get_color(vc, info, scr_readw(s), 0));
1282 }
1283
1284 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1285 {
1286         unsigned short chr;
1287
1288         scr_writew(c, &chr);
1289         fbcon_putcs(vc, &chr, 1, ypos, xpos);
1290 }
1291
1292 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1293 {
1294         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1295         struct fbcon_ops *ops = info->fbcon_par;
1296
1297         if (!fbcon_is_inactive(vc, info))
1298                 ops->clear_margins(vc, info, bottom_only);
1299 }
1300
1301 static void fbcon_cursor(struct vc_data *vc, int mode)
1302 {
1303         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1304         struct fbcon_ops *ops = info->fbcon_par;
1305         int y;
1306         int c = scr_readw((u16 *) vc->vc_pos);
1307
1308         if (fbcon_is_inactive(vc, info))
1309                 return;
1310
1311         ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1312         if (mode & CM_SOFTBACK) {
1313                 mode &= ~CM_SOFTBACK;
1314                 y = softback_lines;
1315         } else {
1316                 if (softback_lines)
1317                         fbcon_set_origin(vc);
1318                 y = 0;
1319         }
1320
1321         ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
1322                     get_color(vc, info, c, 0));
1323         vbl_cursor_cnt = CURSOR_DRAW_DELAY;
1324 }
1325
1326 static int scrollback_phys_max = 0;
1327 static int scrollback_max = 0;
1328 static int scrollback_current = 0;
1329
1330 /*
1331  * If no vc is existent yet, just set struct display
1332  */
1333 static void fbcon_preset_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1334                               int unit)
1335 {
1336         struct display *p = &fb_display[unit];
1337         struct display *t = &fb_display[fg_console];
1338
1339         if (var_to_display(p, var, info))
1340                 return;
1341
1342         p->fontdata = t->fontdata;
1343         p->userfont = t->userfont;
1344         if (p->userfont)
1345                 REFCOUNT(p->fontdata)++;
1346 }
1347
1348 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1349                            struct vc_data *vc)
1350 {
1351         struct display *p = &fb_display[vc->vc_num], *t;
1352         struct vc_data **default_mode = vc->vc_display_fg;
1353         struct vc_data *svc = *default_mode;
1354         struct fbcon_ops *ops = info->fbcon_par;
1355         int rows, cols, charcnt = 256;
1356
1357         if (var_to_display(p, var, info))
1358                 return;
1359         t = &fb_display[svc->vc_num];
1360         if (!vc->vc_font.data) {
1361                 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1362                 vc->vc_font.width = (*default_mode)->vc_font.width;
1363                 vc->vc_font.height = (*default_mode)->vc_font.height;
1364                 p->userfont = t->userfont;
1365                 if (p->userfont)
1366                         REFCOUNT(p->fontdata)++;
1367         }
1368         if (p->userfont)
1369                 charcnt = FNTCHARCNT(p->fontdata);
1370
1371         var->activate = FB_ACTIVATE_NOW;
1372         info->var.activate = var->activate;
1373         var->yoffset = info->var.yoffset;
1374         var->xoffset = info->var.xoffset;
1375         fb_set_var(info, var);
1376         ops->var = info->var;
1377         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1378         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1379         if (charcnt == 256) {
1380                 vc->vc_hi_font_mask = 0;
1381         } else {
1382                 vc->vc_hi_font_mask = 0x100;
1383                 if (vc->vc_can_do_color)
1384                         vc->vc_complement_mask <<= 1;
1385         }
1386
1387         if (!*svc->vc_uni_pagedir_loc)
1388                 con_set_default_unimap(svc);
1389         if (!*vc->vc_uni_pagedir_loc)
1390                 con_copy_unimap(vc, svc);
1391
1392         cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1393         rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1394         cols /= vc->vc_font.width;
1395         rows /= vc->vc_font.height;
1396         vc_resize(vc, cols, rows);
1397
1398         if (CON_IS_VISIBLE(vc)) {
1399                 update_screen(vc);
1400                 if (softback_buf)
1401                         fbcon_update_softback(vc);
1402         }
1403 }
1404
1405 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1406 {
1407         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1408         struct fbcon_ops *ops = info->fbcon_par;
1409         struct display *p = &fb_display[vc->vc_num];
1410
1411         p->yscroll += count;
1412         if (p->yscroll >= p->vrows)     /* Deal with wrap */
1413                 p->yscroll -= p->vrows;
1414         ops->var.xoffset = 0;
1415         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1416         ops->var.vmode |= FB_VMODE_YWRAP;
1417         ops->update_start(info);
1418         scrollback_max += count;
1419         if (scrollback_max > scrollback_phys_max)
1420                 scrollback_max = scrollback_phys_max;
1421         scrollback_current = 0;
1422 }
1423
1424 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1425 {
1426         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1427         struct fbcon_ops *ops = info->fbcon_par;
1428         struct display *p = &fb_display[vc->vc_num];
1429
1430         p->yscroll -= count;
1431         if (p->yscroll < 0)     /* Deal with wrap */
1432                 p->yscroll += p->vrows;
1433         ops->var.xoffset = 0;
1434         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1435         ops->var.vmode |= FB_VMODE_YWRAP;
1436         ops->update_start(info);
1437         scrollback_max -= count;
1438         if (scrollback_max < 0)
1439                 scrollback_max = 0;
1440         scrollback_current = 0;
1441 }
1442
1443 static __inline__ void ypan_up(struct vc_data *vc, int count)
1444 {
1445         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1446         struct display *p = &fb_display[vc->vc_num];
1447         struct fbcon_ops *ops = info->fbcon_par;
1448
1449         p->yscroll += count;
1450         if (p->yscroll > p->vrows - vc->vc_rows) {
1451                 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1452                             0, 0, 0, vc->vc_rows, vc->vc_cols);
1453                 p->yscroll -= p->vrows - vc->vc_rows;
1454         }
1455
1456         ops->var.xoffset = 0;
1457         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1458         ops->var.vmode &= ~FB_VMODE_YWRAP;
1459         ops->update_start(info);
1460         fbcon_clear_margins(vc, 1);
1461         scrollback_max += count;
1462         if (scrollback_max > scrollback_phys_max)
1463                 scrollback_max = scrollback_phys_max;
1464         scrollback_current = 0;
1465 }
1466
1467 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1468 {
1469         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1470         struct fbcon_ops *ops = info->fbcon_par;
1471         struct display *p = &fb_display[vc->vc_num];
1472
1473         p->yscroll += count;
1474
1475         if (p->yscroll > p->vrows - vc->vc_rows) {
1476                 p->yscroll -= p->vrows - vc->vc_rows;
1477                 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1478         }
1479
1480         ops->var.xoffset = 0;
1481         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1482         ops->var.vmode &= ~FB_VMODE_YWRAP;
1483         ops->update_start(info);
1484         fbcon_clear_margins(vc, 1);
1485         scrollback_max += count;
1486         if (scrollback_max > scrollback_phys_max)
1487                 scrollback_max = scrollback_phys_max;
1488         scrollback_current = 0;
1489 }
1490
1491 static __inline__ void ypan_down(struct vc_data *vc, int count)
1492 {
1493         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1494         struct display *p = &fb_display[vc->vc_num];
1495         struct fbcon_ops *ops = info->fbcon_par;
1496
1497         p->yscroll -= count;
1498         if (p->yscroll < 0) {
1499                 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1500                             0, vc->vc_rows, vc->vc_cols);
1501                 p->yscroll += p->vrows - vc->vc_rows;
1502         }
1503
1504         ops->var.xoffset = 0;
1505         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1506         ops->var.vmode &= ~FB_VMODE_YWRAP;
1507         ops->update_start(info);
1508         fbcon_clear_margins(vc, 1);
1509         scrollback_max -= count;
1510         if (scrollback_max < 0)
1511                 scrollback_max = 0;
1512         scrollback_current = 0;
1513 }
1514
1515 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1516 {
1517         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1518         struct fbcon_ops *ops = info->fbcon_par;
1519         struct display *p = &fb_display[vc->vc_num];
1520
1521         p->yscroll -= count;
1522
1523         if (p->yscroll < 0) {
1524                 p->yscroll += p->vrows - vc->vc_rows;
1525                 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1526         }
1527
1528         ops->var.xoffset = 0;
1529         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1530         ops->var.vmode &= ~FB_VMODE_YWRAP;
1531         ops->update_start(info);
1532         fbcon_clear_margins(vc, 1);
1533         scrollback_max -= count;
1534         if (scrollback_max < 0)
1535                 scrollback_max = 0;
1536         scrollback_current = 0;
1537 }
1538
1539 static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1540                                   long delta)
1541 {
1542         int count = vc->vc_rows;
1543         unsigned short *d, *s;
1544         unsigned long n;
1545         int line = 0;
1546
1547         d = (u16 *) softback_curr;
1548         if (d == (u16 *) softback_in)
1549                 d = (u16 *) vc->vc_origin;
1550         n = softback_curr + delta * vc->vc_size_row;
1551         softback_lines -= delta;
1552         if (delta < 0) {
1553                 if (softback_curr < softback_top && n < softback_buf) {
1554                         n += softback_end - softback_buf;
1555                         if (n < softback_top) {
1556                                 softback_lines -=
1557                                     (softback_top - n) / vc->vc_size_row;
1558                                 n = softback_top;
1559                         }
1560                 } else if (softback_curr >= softback_top
1561                            && n < softback_top) {
1562                         softback_lines -=
1563                             (softback_top - n) / vc->vc_size_row;
1564                         n = softback_top;
1565                 }
1566         } else {
1567                 if (softback_curr > softback_in && n >= softback_end) {
1568                         n += softback_buf - softback_end;
1569                         if (n > softback_in) {
1570                                 n = softback_in;
1571                                 softback_lines = 0;
1572                         }
1573                 } else if (softback_curr <= softback_in && n > softback_in) {
1574                         n = softback_in;
1575                         softback_lines = 0;
1576                 }
1577         }
1578         if (n == softback_curr)
1579                 return;
1580         softback_curr = n;
1581         s = (u16 *) softback_curr;
1582         if (s == (u16 *) softback_in)
1583                 s = (u16 *) vc->vc_origin;
1584         while (count--) {
1585                 unsigned short *start;
1586                 unsigned short *le;
1587                 unsigned short c;
1588                 int x = 0;
1589                 unsigned short attr = 1;
1590
1591                 start = s;
1592                 le = advance_row(s, 1);
1593                 do {
1594                         c = scr_readw(s);
1595                         if (attr != (c & 0xff00)) {
1596                                 attr = c & 0xff00;
1597                                 if (s > start) {
1598                                         fbcon_putcs(vc, start, s - start,
1599                                                     line, x);
1600                                         x += s - start;
1601                                         start = s;
1602                                 }
1603                         }
1604                         if (c == scr_readw(d)) {
1605                                 if (s > start) {
1606                                         fbcon_putcs(vc, start, s - start,
1607                                                     line, x);
1608                                         x += s - start + 1;
1609                                         start = s + 1;
1610                                 } else {
1611                                         x++;
1612                                         start++;
1613                                 }
1614                         }
1615                         s++;
1616                         d++;
1617                 } while (s < le);
1618                 if (s > start)
1619                         fbcon_putcs(vc, start, s - start, line, x);
1620                 line++;
1621                 if (d == (u16 *) softback_end)
1622                         d = (u16 *) softback_buf;
1623                 if (d == (u16 *) softback_in)
1624                         d = (u16 *) vc->vc_origin;
1625                 if (s == (u16 *) softback_end)
1626                         s = (u16 *) softback_buf;
1627                 if (s == (u16 *) softback_in)
1628                         s = (u16 *) vc->vc_origin;
1629         }
1630 }
1631
1632 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1633                               int line, int count, int dy)
1634 {
1635         unsigned short *s = (unsigned short *)
1636                 (vc->vc_origin + vc->vc_size_row * line);
1637
1638         while (count--) {
1639                 unsigned short *start = s;
1640                 unsigned short *le = advance_row(s, 1);
1641                 unsigned short c;
1642                 int x = 0;
1643                 unsigned short attr = 1;
1644
1645                 do {
1646                         c = scr_readw(s);
1647                         if (attr != (c & 0xff00)) {
1648                                 attr = c & 0xff00;
1649                                 if (s > start) {
1650                                         fbcon_putcs(vc, start, s - start,
1651                                                     dy, x);
1652                                         x += s - start;
1653                                         start = s;
1654                                 }
1655                         }
1656                         console_conditional_schedule();
1657                         s++;
1658                 } while (s < le);
1659                 if (s > start)
1660                         fbcon_putcs(vc, start, s - start, dy, x);
1661                 console_conditional_schedule();
1662                 dy++;
1663         }
1664 }
1665
1666 static void fbcon_redraw(struct vc_data *vc, struct display *p,
1667                          int line, int count, int offset)
1668 {
1669         unsigned short *d = (unsigned short *)
1670             (vc->vc_origin + vc->vc_size_row * line);
1671         unsigned short *s = d + offset;
1672
1673         while (count--) {
1674                 unsigned short *start = s;
1675                 unsigned short *le = advance_row(s, 1);
1676                 unsigned short c;
1677                 int x = 0;
1678                 unsigned short attr = 1;
1679
1680                 do {
1681                         c = scr_readw(s);
1682                         if (attr != (c & 0xff00)) {
1683                                 attr = c & 0xff00;
1684                                 if (s > start) {
1685                                         fbcon_putcs(vc, start, s - start,
1686                                                     line, x);
1687                                         x += s - start;
1688                                         start = s;
1689                                 }
1690                         }
1691                         if (c == scr_readw(d)) {
1692                                 if (s > start) {
1693                                         fbcon_putcs(vc, start, s - start,
1694                                                      line, x);
1695                                         x += s - start + 1;
1696                                         start = s + 1;
1697                                 } else {
1698                                         x++;
1699                                         start++;
1700                                 }
1701                         }
1702                         scr_writew(c, d);
1703                         console_conditional_schedule();
1704                         s++;
1705                         d++;
1706                 } while (s < le);
1707                 if (s > start)
1708                         fbcon_putcs(vc, start, s - start, line, x);
1709                 console_conditional_schedule();
1710                 if (offset > 0)
1711                         line++;
1712                 else {
1713                         line--;
1714                         /* NOTE: We subtract two lines from these pointers */
1715                         s -= vc->vc_size_row;
1716                         d -= vc->vc_size_row;
1717                 }
1718         }
1719 }
1720
1721 static inline void fbcon_softback_note(struct vc_data *vc, int t,
1722                                        int count)
1723 {
1724         unsigned short *p;
1725
1726         if (vc->vc_num != fg_console)
1727                 return;
1728         p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1729
1730         while (count) {
1731                 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1732                 count--;
1733                 p = advance_row(p, 1);
1734                 softback_in += vc->vc_size_row;
1735                 if (softback_in == softback_end)
1736                         softback_in = softback_buf;
1737                 if (softback_in == softback_top) {
1738                         softback_top += vc->vc_size_row;
1739                         if (softback_top == softback_end)
1740                                 softback_top = softback_buf;
1741                 }
1742         }
1743         softback_curr = softback_in;
1744 }
1745
1746 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
1747                         int count)
1748 {
1749         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1750         struct display *p = &fb_display[vc->vc_num];
1751         struct fbcon_ops *ops = info->fbcon_par;
1752         int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1753
1754         if (fbcon_is_inactive(vc, info))
1755                 return -EINVAL;
1756
1757         fbcon_cursor(vc, CM_ERASE);
1758
1759         /*
1760          * ++Geert: Only use ywrap/ypan if the console is in text mode
1761          * ++Andrew: Only use ypan on hardware text mode when scrolling the
1762          *           whole screen (prevents flicker).
1763          */
1764
1765         switch (dir) {
1766         case SM_UP:
1767                 if (count > vc->vc_rows)        /* Maximum realistic size */
1768                         count = vc->vc_rows;
1769                 if (softback_top)
1770                         fbcon_softback_note(vc, t, count);
1771                 if (logo_shown >= 0)
1772                         goto redraw_up;
1773                 switch (p->scrollmode) {
1774                 case SCROLL_MOVE:
1775                         ops->bmove(vc, info, t + count, 0, t, 0,
1776                                     b - t - count, vc->vc_cols);
1777                         ops->clear(vc, info, b - count, 0, count,
1778                                   vc->vc_cols);
1779                         break;
1780
1781                 case SCROLL_WRAP_MOVE:
1782                         if (b - t - count > 3 * vc->vc_rows >> 2) {
1783                                 if (t > 0)
1784                                         fbcon_bmove(vc, 0, 0, count, 0, t,
1785                                                     vc->vc_cols);
1786                                 ywrap_up(vc, count);
1787                                 if (vc->vc_rows - b > 0)
1788                                         fbcon_bmove(vc, b - count, 0, b, 0,
1789                                                     vc->vc_rows - b,
1790                                                     vc->vc_cols);
1791                         } else if (info->flags & FBINFO_READS_FAST)
1792                                 fbcon_bmove(vc, t + count, 0, t, 0,
1793                                             b - t - count, vc->vc_cols);
1794                         else
1795                                 goto redraw_up;
1796                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1797                         break;
1798
1799                 case SCROLL_PAN_REDRAW:
1800                         if ((p->yscroll + count <=
1801                              2 * (p->vrows - vc->vc_rows))
1802                             && ((!scroll_partial && (b - t == vc->vc_rows))
1803                                 || (scroll_partial
1804                                     && (b - t - count >
1805                                         3 * vc->vc_rows >> 2)))) {
1806                                 if (t > 0)
1807                                         fbcon_redraw_move(vc, p, 0, t, count);
1808                                 ypan_up_redraw(vc, t, count);
1809                                 if (vc->vc_rows - b > 0)
1810                                         fbcon_redraw_move(vc, p, b,
1811                                                           vc->vc_rows - b, b);
1812                         } else
1813                                 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1814                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1815                         break;
1816
1817                 case SCROLL_PAN_MOVE:
1818                         if ((p->yscroll + count <=
1819                              2 * (p->vrows - vc->vc_rows))
1820                             && ((!scroll_partial && (b - t == vc->vc_rows))
1821                                 || (scroll_partial
1822                                     && (b - t - count >
1823                                         3 * vc->vc_rows >> 2)))) {
1824                                 if (t > 0)
1825                                         fbcon_bmove(vc, 0, 0, count, 0, t,
1826                                                     vc->vc_cols);
1827                                 ypan_up(vc, count);
1828                                 if (vc->vc_rows - b > 0)
1829                                         fbcon_bmove(vc, b - count, 0, b, 0,
1830                                                     vc->vc_rows - b,
1831                                                     vc->vc_cols);
1832                         } else if (info->flags & FBINFO_READS_FAST)
1833                                 fbcon_bmove(vc, t + count, 0, t, 0,
1834                                             b - t - count, vc->vc_cols);
1835                         else
1836                                 goto redraw_up;
1837                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1838                         break;
1839
1840                 case SCROLL_REDRAW:
1841                       redraw_up:
1842                         fbcon_redraw(vc, p, t, b - t - count,
1843                                      count * vc->vc_cols);
1844                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1845                         scr_memsetw((unsigned short *) (vc->vc_origin +
1846                                                         vc->vc_size_row *
1847                                                         (b - count)),
1848                                     vc->vc_video_erase_char,
1849                                     vc->vc_size_row * count);
1850                         return 1;
1851                 }
1852                 break;
1853
1854         case SM_DOWN:
1855                 if (count > vc->vc_rows)        /* Maximum realistic size */
1856                         count = vc->vc_rows;
1857                 if (logo_shown >= 0)
1858                         goto redraw_down;
1859                 switch (p->scrollmode) {
1860                 case SCROLL_MOVE:
1861                         ops->bmove(vc, info, t, 0, t + count, 0,
1862                                     b - t - count, vc->vc_cols);
1863                         ops->clear(vc, info, t, 0, count, vc->vc_cols);
1864                         break;
1865
1866                 case SCROLL_WRAP_MOVE:
1867                         if (b - t - count > 3 * vc->vc_rows >> 2) {
1868                                 if (vc->vc_rows - b > 0)
1869                                         fbcon_bmove(vc, b, 0, b - count, 0,
1870                                                     vc->vc_rows - b,
1871                                                     vc->vc_cols);
1872                                 ywrap_down(vc, count);
1873                                 if (t > 0)
1874                                         fbcon_bmove(vc, count, 0, 0, 0, t,
1875                                                     vc->vc_cols);
1876                         } else if (info->flags & FBINFO_READS_FAST)
1877                                 fbcon_bmove(vc, t, 0, t + count, 0,
1878                                             b - t - count, vc->vc_cols);
1879                         else
1880                                 goto redraw_down;
1881                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1882                         break;
1883
1884                 case SCROLL_PAN_MOVE:
1885                         if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1886                             && ((!scroll_partial && (b - t == vc->vc_rows))
1887                                 || (scroll_partial
1888                                     && (b - t - count >
1889                                         3 * vc->vc_rows >> 2)))) {
1890                                 if (vc->vc_rows - b > 0)
1891                                         fbcon_bmove(vc, b, 0, b - count, 0,
1892                                                     vc->vc_rows - b,
1893                                                     vc->vc_cols);
1894                                 ypan_down(vc, count);
1895                                 if (t > 0)
1896                                         fbcon_bmove(vc, count, 0, 0, 0, t,
1897                                                     vc->vc_cols);
1898                         } else if (info->flags & FBINFO_READS_FAST)
1899                                 fbcon_bmove(vc, t, 0, t + count, 0,
1900                                             b - t - count, vc->vc_cols);
1901                         else
1902                                 goto redraw_down;
1903                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1904                         break;
1905
1906                 case SCROLL_PAN_REDRAW:
1907                         if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1908                             && ((!scroll_partial && (b - t == vc->vc_rows))
1909                                 || (scroll_partial
1910                                     && (b - t - count >
1911                                         3 * vc->vc_rows >> 2)))) {
1912                                 if (vc->vc_rows - b > 0)
1913                                         fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
1914                                                           b - count);
1915                                 ypan_down_redraw(vc, t, count);
1916                                 if (t > 0)
1917                                         fbcon_redraw_move(vc, p, count, t, 0);
1918                         } else
1919                                 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
1920                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1921                         break;
1922
1923                 case SCROLL_REDRAW:
1924                       redraw_down:
1925                         fbcon_redraw(vc, p, b - 1, b - t - count,
1926                                      -count * vc->vc_cols);
1927                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1928                         scr_memsetw((unsigned short *) (vc->vc_origin +
1929                                                         vc->vc_size_row *
1930                                                         t),
1931                                     vc->vc_video_erase_char,
1932                                     vc->vc_size_row * count);
1933                         return 1;
1934                 }
1935         }
1936         return 0;
1937 }
1938
1939
1940 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
1941                         int height, int width)
1942 {
1943         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1944         struct display *p = &fb_display[vc->vc_num];
1945
1946         if (fbcon_is_inactive(vc, info))
1947                 return;
1948
1949         if (!width || !height)
1950                 return;
1951
1952         /*  Split blits that cross physical y_wrap case.
1953          *  Pathological case involves 4 blits, better to use recursive
1954          *  code rather than unrolled case
1955          *
1956          *  Recursive invocations don't need to erase the cursor over and
1957          *  over again, so we use fbcon_bmove_rec()
1958          */
1959         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
1960                         p->vrows - p->yscroll);
1961 }
1962
1963 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
1964                             int dy, int dx, int height, int width, u_int y_break)
1965 {
1966         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1967         struct fbcon_ops *ops = info->fbcon_par;
1968         u_int b;
1969
1970         if (sy < y_break && sy + height > y_break) {
1971                 b = y_break - sy;
1972                 if (dy < sy) {  /* Avoid trashing self */
1973                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1974                                         y_break);
1975                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1976                                         height - b, width, y_break);
1977                 } else {
1978                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1979                                         height - b, width, y_break);
1980                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1981                                         y_break);
1982                 }
1983                 return;
1984         }
1985
1986         if (dy < y_break && dy + height > y_break) {
1987                 b = y_break - dy;
1988                 if (dy < sy) {  /* Avoid trashing self */
1989                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1990                                         y_break);
1991                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1992                                         height - b, width, y_break);
1993                 } else {
1994                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1995                                         height - b, width, y_break);
1996                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1997                                         y_break);
1998                 }
1999                 return;
2000         }
2001         ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
2002                    height, width);
2003 }
2004
2005 static __inline__ void updatescrollmode(struct display *p,
2006                                         struct fb_info *info,
2007                                         struct vc_data *vc)
2008 {
2009         struct fbcon_ops *ops = info->fbcon_par;
2010         int fh = vc->vc_font.height;
2011         int cap = info->flags;
2012         u16 t = 0;
2013         int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
2014                                   info->fix.xpanstep);
2015         int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
2016         int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2017         int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
2018                                    info->var.xres_virtual);
2019         int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
2020                 divides(ypan, vc->vc_font.height) && vyres > yres;
2021         int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
2022                 divides(ywrap, vc->vc_font.height) &&
2023                 divides(vc->vc_font.height, vyres) &&
2024                 divides(vc->vc_font.height, yres);
2025         int reading_fast = cap & FBINFO_READS_FAST;
2026         int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
2027                 !(cap & FBINFO_HWACCEL_DISABLED);
2028         int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
2029                 !(cap & FBINFO_HWACCEL_DISABLED);
2030
2031         p->vrows = vyres/fh;
2032         if (yres > (fh * (vc->vc_rows + 1)))
2033                 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2034         if ((yres % fh) && (vyres % fh < yres % fh))
2035                 p->vrows--;
2036
2037         if (good_wrap || good_pan) {
2038                 if (reading_fast || fast_copyarea)
2039                         p->scrollmode = good_wrap ?
2040                                 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
2041                 else
2042                         p->scrollmode = good_wrap ? SCROLL_REDRAW :
2043                                 SCROLL_PAN_REDRAW;
2044         } else {
2045                 if (reading_fast || (fast_copyarea && !fast_imageblit))
2046                         p->scrollmode = SCROLL_MOVE;
2047                 else
2048                         p->scrollmode = SCROLL_REDRAW;
2049         }
2050 }
2051
2052 static int fbcon_resize(struct vc_data *vc, unsigned int width,
2053                         unsigned int height)
2054 {
2055         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2056         struct fbcon_ops *ops = info->fbcon_par;
2057         struct display *p = &fb_display[vc->vc_num];
2058         struct fb_var_screeninfo var = info->var;
2059         int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2060
2061         virt_w = FBCON_SWAP(ops->rotate, width, height);
2062         virt_h = FBCON_SWAP(ops->rotate, height, width);
2063         virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2064                                  vc->vc_font.height);
2065         virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2066                                  vc->vc_font.width);
2067         var.xres = virt_w * virt_fw;
2068         var.yres = virt_h * virt_fh;
2069         x_diff = info->var.xres - var.xres;
2070         y_diff = info->var.yres - var.yres;
2071         if (x_diff < 0 || x_diff > virt_fw ||
2072             y_diff < 0 || y_diff > virt_fh) {
2073                 const struct fb_videomode *mode;
2074
2075                 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2076                 mode = fb_find_best_mode(&var, &info->modelist);
2077                 if (mode == NULL)
2078                         return -EINVAL;
2079                 display_to_var(&var, p);
2080                 fb_videomode_to_var(&var, mode);
2081
2082                 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2083                         return -EINVAL;
2084
2085                 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2086                 if (CON_IS_VISIBLE(vc)) {
2087                         var.activate = FB_ACTIVATE_NOW |
2088                                 FB_ACTIVATE_FORCE;
2089                         fb_set_var(info, &var);
2090                 }
2091                 var_to_display(p, &info->var, info);
2092                 ops->var = info->var;
2093         }
2094         updatescrollmode(p, info, vc);
2095         return 0;
2096 }
2097
2098 static int fbcon_switch(struct vc_data *vc)
2099 {
2100         struct fb_info *info, *old_info = NULL;
2101         struct fbcon_ops *ops;
2102         struct display *p = &fb_display[vc->vc_num];
2103         struct fb_var_screeninfo var;
2104         int i, prev_console, charcnt = 256;
2105
2106         info = registered_fb[con2fb_map[vc->vc_num]];
2107         ops = info->fbcon_par;
2108
2109         if (softback_top) {
2110                 if (softback_lines)
2111                         fbcon_set_origin(vc);
2112                 softback_top = softback_curr = softback_in = softback_buf;
2113                 softback_lines = 0;
2114                 fbcon_update_softback(vc);
2115         }
2116
2117         if (logo_shown >= 0) {
2118                 struct vc_data *conp2 = vc_cons[logo_shown].d;
2119
2120                 if (conp2->vc_top == logo_lines
2121                     && conp2->vc_bottom == conp2->vc_rows)
2122                         conp2->vc_top = 0;
2123                 logo_shown = FBCON_LOGO_CANSHOW;
2124         }
2125
2126         prev_console = ops->currcon;
2127         if (prev_console != -1)
2128                 old_info = registered_fb[con2fb_map[prev_console]];
2129         /*
2130          * FIXME: If we have multiple fbdev's loaded, we need to
2131          * update all info->currcon.  Perhaps, we can place this
2132          * in a centralized structure, but this might break some
2133          * drivers.
2134          *
2135          * info->currcon = vc->vc_num;
2136          */
2137         for (i = 0; i < FB_MAX; i++) {
2138                 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
2139                         struct fbcon_ops *o = registered_fb[i]->fbcon_par;
2140
2141                         o->currcon = vc->vc_num;
2142                 }
2143         }
2144         memset(&var, 0, sizeof(struct fb_var_screeninfo));
2145         display_to_var(&var, p);
2146         var.activate = FB_ACTIVATE_NOW;
2147
2148         /*
2149          * make sure we don't unnecessarily trip the memcmp()
2150          * in fb_set_var()
2151          */
2152         info->var.activate = var.activate;
2153         var.yoffset = info->var.yoffset;
2154         var.xoffset = info->var.xoffset;
2155         var.vmode = info->var.vmode;
2156         fb_set_var(info, &var);
2157         ops->var = info->var;
2158
2159         if (old_info != NULL && (old_info != info ||
2160                                  info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2161                 if (info->fbops->fb_set_par)
2162                         info->fbops->fb_set_par(info);
2163
2164                 if (old_info != info)
2165                         fbcon_del_cursor_timer(old_info);
2166         }
2167
2168         if (fbcon_is_inactive(vc, info) ||
2169             ops->blank_state != FB_BLANK_UNBLANK)
2170                 fbcon_del_cursor_timer(info);
2171         else
2172                 fbcon_add_cursor_timer(info);
2173
2174         set_blitting_type(vc, info);
2175         ops->cursor_reset = 1;
2176
2177         if (ops->rotate_font && ops->rotate_font(info, vc)) {
2178                 ops->rotate = FB_ROTATE_UR;
2179                 set_blitting_type(vc, info);
2180         }
2181
2182         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2183         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2184
2185         if (p->userfont)
2186                 charcnt = FNTCHARCNT(vc->vc_font.data);
2187
2188         if (charcnt > 256)
2189                 vc->vc_complement_mask <<= 1;
2190
2191         updatescrollmode(p, info, vc);
2192
2193         switch (p->scrollmode) {
2194         case SCROLL_WRAP_MOVE:
2195                 scrollback_phys_max = p->vrows - vc->vc_rows;
2196                 break;
2197         case SCROLL_PAN_MOVE:
2198         case SCROLL_PAN_REDRAW:
2199                 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2200                 if (scrollback_phys_max < 0)
2201                         scrollback_phys_max = 0;
2202                 break;
2203         default:
2204                 scrollback_phys_max = 0;
2205                 break;
2206         }
2207
2208         scrollback_max = 0;
2209         scrollback_current = 0;
2210
2211         if (!fbcon_is_inactive(vc, info)) {
2212             ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2213             ops->update_start(info);
2214         }
2215
2216         fbcon_set_palette(vc, color_table);
2217         fbcon_clear_margins(vc, 0);
2218
2219         if (logo_shown == FBCON_LOGO_DRAW) {
2220
2221                 logo_shown = fg_console;
2222                 /* This is protected above by initmem_freed */
2223                 fb_show_logo(info, ops->rotate);
2224                 update_region(vc,
2225                               vc->vc_origin + vc->vc_size_row * vc->vc_top,
2226                               vc->vc_size_row * (vc->vc_bottom -
2227                                                  vc->vc_top) / 2);
2228                 return 0;
2229         }
2230         return 1;
2231 }
2232
2233 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2234                                 int blank)
2235 {
2236         struct fb_event event;
2237
2238         if (blank) {
2239                 unsigned short charmask = vc->vc_hi_font_mask ?
2240                         0x1ff : 0xff;
2241                 unsigned short oldc;
2242
2243                 oldc = vc->vc_video_erase_char;
2244                 vc->vc_video_erase_char &= charmask;
2245                 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2246                 vc->vc_video_erase_char = oldc;
2247         }
2248
2249
2250         event.info = info;
2251         event.data = &blank;
2252         fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
2253 }
2254
2255 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2256 {
2257         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2258         struct fbcon_ops *ops = info->fbcon_par;
2259
2260         if (mode_switch) {
2261                 struct fb_var_screeninfo var = info->var;
2262
2263                 ops->graphics = 1;
2264
2265                 if (!blank) {
2266                         if (info->fbops->fb_save_state)
2267                                 info->fbops->fb_save_state(info);
2268                         var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2269                         fb_set_var(info, &var);
2270                         ops->graphics = 0;
2271                         ops->var = info->var;
2272                 } else if (info->fbops->fb_restore_state)
2273                         info->fbops->fb_restore_state(info);
2274         }
2275
2276         if (!fbcon_is_inactive(vc, info)) {
2277                 if (ops->blank_state != blank) {
2278                         ops->blank_state = blank;
2279                         fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2280                         ops->cursor_flash = (!blank);
2281
2282                         if (fb_blank(info, blank))
2283                                 fbcon_generic_blank(vc, info, blank);
2284                 }
2285
2286                 if (!blank)
2287                         update_screen(vc);
2288         }
2289
2290         if (fbcon_is_inactive(vc, info) ||
2291             ops->blank_state != FB_BLANK_UNBLANK)
2292                 fbcon_del_cursor_timer(info);
2293         else
2294                 fbcon_add_cursor_timer(info);
2295
2296         return 0;
2297 }
2298
2299 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2300 {
2301         u8 *fontdata = vc->vc_font.data;
2302         u8 *data = font->data;
2303         int i, j;
2304
2305         font->width = vc->vc_font.width;
2306         font->height = vc->vc_font.height;
2307         font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2308         if (!font->data)
2309                 return 0;
2310
2311         if (font->width <= 8) {
2312                 j = vc->vc_font.height;
2313                 for (i = 0; i < font->charcount; i++) {
2314                         memcpy(data, fontdata, j);
2315                         memset(data + j, 0, 32 - j);
2316                         data += 32;
2317                         fontdata += j;
2318                 }
2319         } else if (font->width <= 16) {
2320                 j = vc->vc_font.height * 2;
2321                 for (i = 0; i < font->charcount; i++) {
2322                         memcpy(data, fontdata, j);
2323                         memset(data + j, 0, 64 - j);
2324                         data += 64;
2325                         fontdata += j;
2326                 }
2327         } else if (font->width <= 24) {
2328                 for (i = 0; i < font->charcount; i++) {
2329                         for (j = 0; j < vc->vc_font.height; j++) {
2330                                 *data++ = fontdata[0];
2331                                 *data++ = fontdata[1];
2332                                 *data++ = fontdata[2];
2333                                 fontdata += sizeof(u32);
2334                         }
2335                         memset(data, 0, 3 * (32 - j));
2336                         data += 3 * (32 - j);
2337                 }
2338         } else {
2339                 j = vc->vc_font.height * 4;
2340                 for (i = 0; i < font->charcount; i++) {
2341                         memcpy(data, fontdata, j);
2342                         memset(data + j, 0, 128 - j);
2343                         data += 128;
2344                         fontdata += j;
2345                 }
2346         }
2347         return 0;
2348 }
2349
2350 static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2351                              const u8 * data, int userfont)
2352 {
2353         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2354         struct fbcon_ops *ops = info->fbcon_par;
2355         struct display *p = &fb_display[vc->vc_num];
2356         int resize;
2357         int cnt;
2358         char *old_data = NULL;
2359
2360         if (CON_IS_VISIBLE(vc) && softback_lines)
2361                 fbcon_set_origin(vc);
2362
2363         resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2364         if (p->userfont)
2365                 old_data = vc->vc_font.data;
2366         if (userfont)
2367                 cnt = FNTCHARCNT(data);
2368         else
2369                 cnt = 256;
2370         vc->vc_font.data = (void *)(p->fontdata = data);
2371         if ((p->userfont = userfont))
2372                 REFCOUNT(data)++;
2373         vc->vc_font.width = w;
2374         vc->vc_font.height = h;
2375         if (vc->vc_hi_font_mask && cnt == 256) {
2376                 vc->vc_hi_font_mask = 0;
2377                 if (vc->vc_can_do_color) {
2378                         vc->vc_complement_mask >>= 1;
2379                         vc->vc_s_complement_mask >>= 1;
2380                 }
2381
2382                 /* ++Edmund: reorder the attribute bits */
2383                 if (vc->vc_can_do_color) {
2384                         unsigned short *cp =
2385                             (unsigned short *) vc->vc_origin;
2386                         int count = vc->vc_screenbuf_size / 2;
2387                         unsigned short c;
2388                         for (; count > 0; count--, cp++) {
2389                                 c = scr_readw(cp);
2390                                 scr_writew(((c & 0xfe00) >> 1) |
2391                                            (c & 0xff), cp);
2392                         }
2393                         c = vc->vc_video_erase_char;
2394                         vc->vc_video_erase_char =
2395                             ((c & 0xfe00) >> 1) | (c & 0xff);
2396                         vc->vc_attr >>= 1;
2397                 }
2398         } else if (!vc->vc_hi_font_mask && cnt == 512) {
2399                 vc->vc_hi_font_mask = 0x100;
2400                 if (vc->vc_can_do_color) {
2401                         vc->vc_complement_mask <<= 1;
2402                         vc->vc_s_complement_mask <<= 1;
2403                 }
2404
2405                 /* ++Edmund: reorder the attribute bits */
2406                 {
2407                         unsigned short *cp =
2408                             (unsigned short *) vc->vc_origin;
2409                         int count = vc->vc_screenbuf_size / 2;
2410                         unsigned short c;
2411                         for (; count > 0; count--, cp++) {
2412                                 unsigned short newc;
2413                                 c = scr_readw(cp);
2414                                 if (vc->vc_can_do_color)
2415                                         newc =
2416                                             ((c & 0xff00) << 1) | (c &
2417                                                                    0xff);
2418                                 else
2419                                         newc = c & ~0x100;
2420                                 scr_writew(newc, cp);
2421                         }
2422                         c = vc->vc_video_erase_char;
2423                         if (vc->vc_can_do_color) {
2424                                 vc->vc_video_erase_char =
2425                                     ((c & 0xff00) << 1) | (c & 0xff);
2426                                 vc->vc_attr <<= 1;
2427                         } else
2428                                 vc->vc_video_erase_char = c & ~0x100;
2429                 }
2430
2431         }
2432
2433         if (resize) {
2434                 int cols, rows;
2435
2436                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2437                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2438                 cols /= w;
2439                 rows /= h;
2440                 vc_resize(vc, cols, rows);
2441                 if (CON_IS_VISIBLE(vc) && softback_buf)
2442                         fbcon_update_softback(vc);
2443         } else if (CON_IS_VISIBLE(vc)
2444                    && vc->vc_mode == KD_TEXT) {
2445                 fbcon_clear_margins(vc, 0);
2446                 update_screen(vc);
2447         }
2448
2449         if (old_data && (--REFCOUNT(old_data) == 0))
2450                 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2451         return 0;
2452 }
2453
2454 static int fbcon_copy_font(struct vc_data *vc, int con)
2455 {
2456         struct display *od = &fb_display[con];
2457         struct console_font *f = &vc->vc_font;
2458
2459         if (od->fontdata == f->data)
2460                 return 0;       /* already the same font... */
2461         return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2462 }
2463
2464 /*
2465  *  User asked to set font; we are guaranteed that
2466  *      a) width and height are in range 1..32
2467  *      b) charcount does not exceed 512
2468  *  but lets not assume that, since someone might someday want to use larger
2469  *  fonts. And charcount of 512 is small for unicode support.
2470  *
2471  *  However, user space gives the font in 32 rows , regardless of
2472  *  actual font height. So a new API is needed if support for larger fonts
2473  *  is ever implemented.
2474  */
2475
2476 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2477 {
2478         unsigned charcount = font->charcount;
2479         int w = font->width;
2480         int h = font->height;
2481         int size;
2482         int i, csum;
2483         u8 *new_data, *data = font->data;
2484         int pitch = (font->width+7) >> 3;
2485
2486         /* Is there a reason why fbconsole couldn't handle any charcount >256?
2487          * If not this check should be changed to charcount < 256 */
2488         if (charcount != 256 && charcount != 512)
2489                 return -EINVAL;
2490
2491         size = h * pitch * charcount;
2492
2493         new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2494
2495         if (!new_data)
2496                 return -ENOMEM;
2497
2498         new_data += FONT_EXTRA_WORDS * sizeof(int);
2499         FNTSIZE(new_data) = size;
2500         FNTCHARCNT(new_data) = charcount;
2501         REFCOUNT(new_data) = 0; /* usage counter */
2502         for (i=0; i< charcount; i++) {
2503                 memcpy(new_data + i*h*pitch, data +  i*32*pitch, h*pitch);
2504         }
2505
2506         /* Since linux has a nice crc32 function use it for counting font
2507          * checksums. */
2508         csum = crc32(0, new_data, size);
2509
2510         FNTSUM(new_data) = csum;
2511         /* Check if the same font is on some other console already */
2512         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2513                 struct vc_data *tmp = vc_cons[i].d;
2514
2515                 if (fb_display[i].userfont &&
2516                     fb_display[i].fontdata &&
2517                     FNTSUM(fb_display[i].fontdata) == csum &&
2518                     FNTSIZE(fb_display[i].fontdata) == size &&
2519                     tmp->vc_font.width == w &&
2520                     !memcmp(fb_display[i].fontdata, new_data, size)) {
2521                         kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2522                         new_data = (u8 *)fb_display[i].fontdata;
2523                         break;
2524                 }
2525         }
2526         return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2527 }
2528
2529 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2530 {
2531         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2532         const struct font_desc *f;
2533
2534         if (!name)
2535                 f = get_default_font(info->var.xres, info->var.yres);
2536         else if (!(f = find_font(name)))
2537                 return -ENOENT;
2538
2539         font->width = f->width;
2540         font->height = f->height;
2541         return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2542 }
2543
2544 static u16 palette_red[16];
2545 static u16 palette_green[16];
2546 static u16 palette_blue[16];
2547
2548 static struct fb_cmap palette_cmap = {
2549         0, 16, palette_red, palette_green, palette_blue, NULL
2550 };
2551
2552 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
2553 {
2554         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2555         int i, j, k, depth;
2556         u8 val;
2557
2558         if (fbcon_is_inactive(vc, info))
2559                 return -EINVAL;
2560
2561         if (!CON_IS_VISIBLE(vc))
2562                 return 0;
2563
2564         depth = fb_get_color_depth(&info->var, &info->fix);
2565         if (depth > 3) {
2566                 for (i = j = 0; i < 16; i++) {
2567                         k = table[i];
2568                         val = vc->vc_palette[j++];
2569                         palette_red[k] = (val << 8) | val;
2570                         val = vc->vc_palette[j++];
2571                         palette_green[k] = (val << 8) | val;
2572                         val = vc->vc_palette[j++];
2573                         palette_blue[k] = (val << 8) | val;
2574                 }
2575                 palette_cmap.len = 16;
2576                 palette_cmap.start = 0;
2577         /*
2578          * If framebuffer is capable of less than 16 colors,
2579          * use default palette of fbcon.
2580          */
2581         } else
2582                 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2583
2584         return fb_set_cmap(&palette_cmap, info);
2585 }
2586
2587 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2588 {
2589         unsigned long p;
2590         int line;
2591
2592         if (vc->vc_num != fg_console || !softback_lines)
2593                 return (u16 *) (vc->vc_origin + offset);
2594         line = offset / vc->vc_size_row;
2595         if (line >= softback_lines)
2596                 return (u16 *) (vc->vc_origin + offset -
2597                                 softback_lines * vc->vc_size_row);
2598         p = softback_curr + offset;
2599         if (p >= softback_end)
2600                 p += softback_buf - softback_end;
2601         return (u16 *) p;
2602 }
2603
2604 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2605                                  int *px, int *py)
2606 {
2607         unsigned long ret;
2608         int x, y;
2609
2610         if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2611                 unsigned long offset = (pos - vc->vc_origin) / 2;
2612
2613                 x = offset % vc->vc_cols;
2614                 y = offset / vc->vc_cols;
2615                 if (vc->vc_num == fg_console)
2616                         y += softback_lines;
2617                 ret = pos + (vc->vc_cols - x) * 2;
2618         } else if (vc->vc_num == fg_console && softback_lines) {
2619                 unsigned long offset = pos - softback_curr;
2620
2621                 if (pos < softback_curr)
2622                         offset += softback_end - softback_buf;
2623                 offset /= 2;
2624                 x = offset % vc->vc_cols;
2625                 y = offset / vc->vc_cols;
2626                 ret = pos + (vc->vc_cols - x) * 2;
2627                 if (ret == softback_end)
2628                         ret = softback_buf;
2629                 if (ret == softback_in)
2630                         ret = vc->vc_origin;
2631         } else {
2632                 /* Should not happen */
2633                 x = y = 0;
2634                 ret = vc->vc_origin;
2635         }
2636         if (px)
2637                 *px = x;
2638         if (py)
2639                 *py = y;
2640         return ret;
2641 }
2642
2643 /* As we might be inside of softback, we may work with non-contiguous buffer,
2644    that's why we have to use a separate routine. */
2645 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2646 {
2647         while (cnt--) {
2648                 u16 a = scr_readw(p);
2649                 if (!vc->vc_can_do_color)
2650                         a ^= 0x0800;
2651                 else if (vc->vc_hi_font_mask == 0x100)
2652                         a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2653                             (((a) & 0x0e00) << 4);
2654                 else
2655                         a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2656                             (((a) & 0x0700) << 4);
2657                 scr_writew(a, p++);
2658                 if (p == (u16 *) softback_end)
2659                         p = (u16 *) softback_buf;
2660                 if (p == (u16 *) softback_in)
2661                         p = (u16 *) vc->vc_origin;
2662         }
2663 }
2664
2665 static int fbcon_scrolldelta(struct vc_data *vc, int lines)
2666 {
2667         struct fb_info *info = registered_fb[con2fb_map[fg_console]];
2668         struct fbcon_ops *ops = info->fbcon_par;
2669         struct display *p = &fb_display[fg_console];
2670         int offset, limit, scrollback_old;
2671
2672         if (softback_top) {
2673                 if (vc->vc_num != fg_console)
2674                         return 0;
2675                 if (vc->vc_mode != KD_TEXT || !lines)
2676                         return 0;
2677                 if (logo_shown >= 0) {
2678                         struct vc_data *conp2 = vc_cons[logo_shown].d;
2679
2680                         if (conp2->vc_top == logo_lines
2681                             && conp2->vc_bottom == conp2->vc_rows)
2682                                 conp2->vc_top = 0;
2683                         if (logo_shown == vc->vc_num) {
2684                                 unsigned long p, q;
2685                                 int i;
2686
2687                                 p = softback_in;
2688                                 q = vc->vc_origin +
2689                                     logo_lines * vc->vc_size_row;
2690                                 for (i = 0; i < logo_lines; i++) {
2691                                         if (p == softback_top)
2692                                                 break;
2693                                         if (p == softback_buf)
2694                                                 p = softback_end;
2695                                         p -= vc->vc_size_row;
2696                                         q -= vc->vc_size_row;
2697                                         scr_memcpyw((u16 *) q, (u16 *) p,
2698                                                     vc->vc_size_row);
2699                                 }
2700                                 softback_in = softback_curr = p;
2701                                 update_region(vc, vc->vc_origin,
2702                                               logo_lines * vc->vc_cols);
2703                         }
2704                         logo_shown = FBCON_LOGO_CANSHOW;
2705                 }
2706                 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2707                 fbcon_redraw_softback(vc, p, lines);
2708                 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2709                 return 0;
2710         }
2711
2712         if (!scrollback_phys_max)
2713                 return -ENOSYS;
2714
2715         scrollback_old = scrollback_current;
2716         scrollback_current -= lines;
2717         if (scrollback_current < 0)
2718                 scrollback_current = 0;
2719         else if (scrollback_current > scrollback_max)
2720                 scrollback_current = scrollback_max;
2721         if (scrollback_current == scrollback_old)
2722                 return 0;
2723
2724         if (fbcon_is_inactive(vc, info))
2725                 return 0;
2726
2727         fbcon_cursor(vc, CM_ERASE);
2728
2729         offset = p->yscroll - scrollback_current;
2730         limit = p->vrows;
2731         switch (p->scrollmode) {
2732         case SCROLL_WRAP_MOVE:
2733                 info->var.vmode |= FB_VMODE_YWRAP;
2734                 break;
2735         case SCROLL_PAN_MOVE:
2736         case SCROLL_PAN_REDRAW:
2737                 limit -= vc->vc_rows;
2738                 info->var.vmode &= ~FB_VMODE_YWRAP;
2739                 break;
2740         }
2741         if (offset < 0)
2742                 offset += limit;
2743         else if (offset >= limit)
2744                 offset -= limit;
2745
2746         ops->var.xoffset = 0;
2747         ops->var.yoffset = offset * vc->vc_font.height;
2748         ops->update_start(info);
2749
2750         if (!scrollback_current)
2751                 fbcon_cursor(vc, CM_DRAW);
2752         return 0;
2753 }
2754
2755 static int fbcon_set_origin(struct vc_data *vc)
2756 {
2757         if (softback_lines)
2758                 fbcon_scrolldelta(vc, softback_lines);
2759         return 0;
2760 }
2761
2762 static void fbcon_suspended(struct fb_info *info)
2763 {
2764         struct vc_data *vc = NULL;
2765         struct fbcon_ops *ops = info->fbcon_par;
2766
2767         if (!ops || ops->currcon < 0)
2768                 return;
2769         vc = vc_cons[ops->currcon].d;
2770
2771         /* Clear cursor, restore saved data */
2772         fbcon_cursor(vc, CM_ERASE);
2773 }
2774
2775 static void fbcon_resumed(struct fb_info *info)
2776 {
2777         struct vc_data *vc;
2778         struct fbcon_ops *ops = info->fbcon_par;
2779
2780         if (!ops || ops->currcon < 0)
2781                 return;
2782         vc = vc_cons[ops->currcon].d;
2783
2784         update_screen(vc);
2785 }
2786
2787 static void fbcon_modechanged(struct fb_info *info)
2788 {
2789         struct fbcon_ops *ops = info->fbcon_par;
2790         struct vc_data *vc;
2791         struct display *p;
2792         int rows, cols;
2793
2794         if (!ops || ops->currcon < 0)
2795                 return;
2796         vc = vc_cons[ops->currcon].d;
2797         if (vc->vc_mode != KD_TEXT ||
2798             registered_fb[con2fb_map[ops->currcon]] != info)
2799                 return;
2800
2801         p = &fb_display[vc->vc_num];
2802         set_blitting_type(vc, info);
2803
2804         if (CON_IS_VISIBLE(vc)) {
2805                 var_to_display(p, &info->var, info);
2806                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2807                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2808                 cols /= vc->vc_font.width;
2809                 rows /= vc->vc_font.height;
2810                 vc_resize(vc, cols, rows);
2811                 updatescrollmode(p, info, vc);
2812                 scrollback_max = 0;
2813                 scrollback_current = 0;
2814
2815                 if (!fbcon_is_inactive(vc, info)) {
2816                     ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2817                     ops->update_start(info);
2818                 }
2819
2820                 fbcon_set_palette(vc, color_table);
2821                 update_screen(vc);
2822                 if (softback_buf)
2823                         fbcon_update_softback(vc);
2824         }
2825 }
2826
2827 static void fbcon_set_all_vcs(struct fb_info *info)
2828 {
2829         struct fbcon_ops *ops = info->fbcon_par;
2830         struct vc_data *vc;
2831         struct display *p;
2832         int i, rows, cols;
2833
2834         if (!ops || ops->currcon < 0)
2835                 return;
2836
2837         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2838                 vc = vc_cons[i].d;
2839                 if (!vc || vc->vc_mode != KD_TEXT ||
2840                     registered_fb[con2fb_map[i]] != info)
2841                         continue;
2842
2843                 p = &fb_display[vc->vc_num];
2844                 set_blitting_type(vc, info);
2845                 var_to_display(p, &info->var, info);
2846                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2847                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2848                 cols /= vc->vc_font.width;
2849                 rows /= vc->vc_font.height;
2850                 vc_resize(vc, cols, rows);
2851
2852                 if (CON_IS_VISIBLE(vc)) {
2853                         updatescrollmode(p, info, vc);
2854                         scrollback_max = 0;
2855                         scrollback_current = 0;
2856
2857                         if (!fbcon_is_inactive(vc, info)) {
2858                             ops->var.xoffset = ops->var.yoffset =
2859                                 p->yscroll = 0;
2860                             ops->update_start(info);
2861                         }
2862
2863                         fbcon_set_palette(vc, color_table);
2864                         update_screen(vc);
2865                         if (softback_buf)
2866                                 fbcon_update_softback(vc);
2867                 }
2868         }
2869
2870         ops->p = &fb_display[ops->currcon];
2871 }
2872
2873 static int fbcon_mode_deleted(struct fb_info *info,
2874                               struct fb_videomode *mode)
2875 {
2876         struct fb_info *fb_info;
2877         struct display *p;
2878         int i, j, found = 0;
2879
2880         /* before deletion, ensure that mode is not in use */
2881         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2882                 j = con2fb_map[i];
2883                 if (j == -1)
2884                         continue;
2885                 fb_info = registered_fb[j];
2886                 if (fb_info != info)
2887                         continue;
2888                 p = &fb_display[i];
2889                 if (!p || !p->mode)
2890                         continue;
2891                 if (fb_mode_is_equal(p->mode, mode)) {
2892                         found = 1;
2893                         break;
2894                 }
2895         }
2896         return found;
2897 }
2898
2899 static int fbcon_fb_unregistered(int idx)
2900 {
2901         int i;
2902
2903         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2904                 if (con2fb_map[i] == idx)
2905                         con2fb_map[i] = -1;
2906         }
2907
2908         if (idx == info_idx) {
2909                 info_idx = -1;
2910
2911                 for (i = 0; i < FB_MAX; i++) {
2912                         if (registered_fb[i] != NULL) {
2913                                 info_idx = i;
2914                                 break;
2915                         }
2916                 }
2917         }
2918
2919         if (info_idx != -1) {
2920                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2921                         if (con2fb_map[i] == -1)
2922                                 con2fb_map[i] = info_idx;
2923                 }
2924         }
2925
2926         if (!num_registered_fb)
2927                 unregister_con_driver(&fb_con);
2928
2929         return 0;
2930 }
2931
2932 static int fbcon_fb_registered(int idx)
2933 {
2934         int ret = 0, i;
2935
2936         if (info_idx == -1) {
2937                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2938                         if (con2fb_map_boot[i] == idx) {
2939                                 info_idx = idx;
2940                                 break;
2941                         }
2942                 }
2943
2944                 if (info_idx != -1)
2945                         ret = fbcon_takeover(1);
2946         } else {
2947                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2948                         if (con2fb_map_boot[i] == idx &&
2949                             con2fb_map[i] == -1)
2950                                 set_con2fb_map(i, idx, 0);
2951                 }
2952         }
2953
2954         return ret;
2955 }
2956
2957 static void fbcon_fb_blanked(struct fb_info *info, int blank)
2958 {
2959         struct fbcon_ops *ops = info->fbcon_par;
2960         struct vc_data *vc;
2961
2962         if (!ops || ops->currcon < 0)
2963                 return;
2964
2965         vc = vc_cons[ops->currcon].d;
2966         if (vc->vc_mode != KD_TEXT ||
2967                         registered_fb[con2fb_map[ops->currcon]] != info)
2968                 return;
2969
2970         if (CON_IS_VISIBLE(vc)) {
2971                 if (blank)
2972                         do_blank_screen(0);
2973                 else
2974                         do_unblank_screen(0);
2975         }
2976         ops->blank_state = blank;
2977 }
2978
2979 static void fbcon_new_modelist(struct fb_info *info)
2980 {
2981         int i;
2982         struct vc_data *vc;
2983         struct fb_var_screeninfo var;
2984         const struct fb_videomode *mode;
2985
2986         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2987                 if (registered_fb[con2fb_map[i]] != info)
2988                         continue;
2989                 if (!fb_display[i].mode)
2990                         continue;
2991                 vc = vc_cons[i].d;
2992                 display_to_var(&var, &fb_display[i]);
2993                 mode = fb_find_nearest_mode(fb_display[i].mode,
2994                                             &info->modelist);
2995                 fb_videomode_to_var(&var, mode);
2996
2997                 if (vc)
2998                         fbcon_set_disp(info, &var, vc);
2999                 else
3000                         fbcon_preset_disp(info, &var, i);
3001
3002         }
3003 }
3004
3005 static int fbcon_event_notify(struct notifier_block *self,
3006                               unsigned long action, void *data)
3007 {
3008         struct fb_event *event = data;
3009         struct fb_info *info = event->info;
3010         struct fb_videomode *mode;
3011         struct fb_con2fbmap *con2fb;
3012         int ret = 0;
3013
3014         /*
3015          * ignore all events except driver registration and deregistration
3016          * if fbcon is not active
3017          */
3018         if (fbcon_has_exited && !(action == FB_EVENT_FB_REGISTERED ||
3019                                   action == FB_EVENT_FB_UNREGISTERED))
3020                 goto done;
3021
3022         switch(action) {
3023         case FB_EVENT_SUSPEND:
3024                 fbcon_suspended(info);
3025                 break;
3026         case FB_EVENT_RESUME:
3027                 fbcon_resumed(info);
3028                 break;
3029         case FB_EVENT_MODE_CHANGE:
3030                 fbcon_modechanged(info);
3031                 break;
3032         case FB_EVENT_MODE_CHANGE_ALL:
3033                 fbcon_set_all_vcs(info);
3034                 break;
3035         case FB_EVENT_MODE_DELETE:
3036                 mode = event->data;
3037                 ret = fbcon_mode_deleted(info, mode);
3038                 break;
3039         case FB_EVENT_FB_REGISTERED:
3040                 ret = fbcon_fb_registered(info->node);
3041                 break;
3042         case FB_EVENT_FB_UNREGISTERED:
3043                 ret = fbcon_fb_unregistered(info->node);
3044                 break;
3045         case FB_EVENT_SET_CONSOLE_MAP:
3046                 con2fb = event->data;
3047                 ret = set_con2fb_map(con2fb->console - 1,
3048                                      con2fb->framebuffer, 1);
3049                 break;
3050         case FB_EVENT_GET_CONSOLE_MAP:
3051                 con2fb = event->data;
3052                 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
3053                 break;
3054         case FB_EVENT_BLANK:
3055                 fbcon_fb_blanked(info, *(int *)event->data);
3056                 break;
3057         case FB_EVENT_NEW_MODELIST:
3058                 fbcon_new_modelist(info);
3059                 break;
3060         }
3061
3062 done:
3063         return ret;
3064 }
3065
3066 /*
3067  *  The console `switch' structure for the frame buffer based console
3068  */
3069
3070 static const struct consw fb_con = {
3071         .owner                  = THIS_MODULE,
3072         .con_startup            = fbcon_startup,
3073         .con_init               = fbcon_init,
3074         .con_deinit             = fbcon_deinit,
3075         .con_clear              = fbcon_clear,
3076         .con_putc               = fbcon_putc,
3077         .con_putcs              = fbcon_putcs,
3078         .con_cursor             = fbcon_cursor,
3079         .con_scroll             = fbcon_scroll,
3080         .con_bmove              = fbcon_bmove,
3081         .con_switch             = fbcon_switch,
3082         .con_blank              = fbcon_blank,
3083         .con_font_set           = fbcon_set_font,
3084         .con_font_get           = fbcon_get_font,
3085         .con_font_default       = fbcon_set_def_font,
3086         .con_font_copy          = fbcon_copy_font,
3087         .con_set_palette        = fbcon_set_palette,
3088         .con_scrolldelta        = fbcon_scrolldelta,
3089         .con_set_origin         = fbcon_set_origin,
3090         .con_invert_region      = fbcon_invert_region,
3091         .con_screen_pos         = fbcon_screen_pos,
3092         .con_getxy              = fbcon_getxy,
3093         .con_resize             = fbcon_resize,
3094 };
3095
3096 static struct notifier_block fbcon_event_notifier = {
3097         .notifier_call  = fbcon_event_notify,
3098 };
3099
3100 static ssize_t store_rotate(struct class_device *class_device,
3101                             const char *buf, size_t count)
3102 {
3103         struct fb_info *info;
3104         int rotate, idx;
3105         char **last = NULL;
3106
3107         if (fbcon_has_exited)
3108                 return count;
3109
3110         acquire_console_sem();
3111         idx = con2fb_map[fg_console];
3112
3113         if (idx == -1 || registered_fb[idx] == NULL)
3114                 goto err;
3115
3116         info = registered_fb[idx];
3117         rotate = simple_strtoul(buf, last, 0);
3118         fbcon_rotate(info, rotate);
3119 err:
3120         release_console_sem();
3121         return count;
3122 }
3123
3124 static ssize_t store_rotate_all(struct class_device *class_device,
3125                                 const char *buf, size_t count)
3126 {
3127         struct fb_info *info;
3128         int rotate, idx;
3129         char **last = NULL;
3130
3131         if (fbcon_has_exited)
3132                 return count;
3133
3134         acquire_console_sem();
3135         idx = con2fb_map[fg_console];
3136
3137         if (idx == -1 || registered_fb[idx] == NULL)
3138                 goto err;
3139
3140         info = registered_fb[idx];
3141         rotate = simple_strtoul(buf, last, 0);
3142         fbcon_rotate_all(info, rotate);
3143 err:
3144         release_console_sem();
3145         return count;
3146 }
3147
3148 static ssize_t show_rotate(struct class_device *class_device, char *buf)
3149 {
3150         struct fb_info *info;
3151         int rotate = 0, idx;
3152
3153         if (fbcon_has_exited)
3154                 return 0;
3155
3156         acquire_console_sem();
3157         idx = con2fb_map[fg_console];
3158
3159         if (idx == -1 || registered_fb[idx] == NULL)
3160                 goto err;
3161
3162         info = registered_fb[idx];
3163         rotate = fbcon_get_rotate(info);
3164 err:
3165         release_console_sem();
3166         return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3167 }
3168
3169 static struct class_device_attribute class_device_attrs[] = {
3170         __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3171         __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3172 };
3173
3174 static int fbcon_init_class_device(void)
3175 {
3176         int i, error = 0;
3177
3178         fbcon_has_sysfs = 1;
3179
3180         for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++) {
3181                 error = class_device_create_file(fbcon_class_device,
3182                                                  &class_device_attrs[i]);
3183
3184                 if (error)
3185                         break;
3186         }
3187
3188         if (error) {
3189                 while (--i >= 0)
3190                         class_device_remove_file(fbcon_class_device,
3191                                                  &class_device_attrs[i]);
3192
3193                 fbcon_has_sysfs = 0;
3194         }
3195
3196         return 0;
3197 }
3198
3199 static void fbcon_start(void)
3200 {
3201         if (num_registered_fb) {
3202                 int i;
3203
3204                 acquire_console_sem();
3205
3206                 for (i = 0; i < FB_MAX; i++) {
3207                         if (registered_fb[i] != NULL) {
3208                                 info_idx = i;
3209                                 break;
3210                         }
3211                 }
3212
3213                 release_console_sem();
3214                 fbcon_takeover(0);
3215         }
3216 }
3217
3218 static void fbcon_exit(void)
3219 {
3220         struct fb_info *info;
3221         int i, j, mapped;
3222
3223         if (fbcon_has_exited)
3224                 return;
3225
3226 #ifdef CONFIG_ATARI
3227         free_irq(IRQ_AUTO_4, fb_vbl_handler);
3228 #endif
3229 #ifdef CONFIG_MAC
3230         if (MACH_IS_MAC && vbl_detected)
3231                 free_irq(IRQ_MAC_VBL, fb_vbl_handler);
3232 #endif
3233
3234         kfree((void *)softback_buf);
3235         softback_buf = 0UL;
3236
3237         for (i = 0; i < FB_MAX; i++) {
3238                 mapped = 0;
3239                 info = registered_fb[i];
3240
3241                 if (info == NULL)
3242                         continue;
3243
3244                 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3245                         if (con2fb_map[j] == i)
3246                                 mapped = 1;
3247                 }
3248
3249                 if (mapped) {
3250                         if (info->fbops->fb_release)
3251                                 info->fbops->fb_release(info, 0);
3252                         module_put(info->fbops->owner);
3253
3254                         if (info->fbcon_par) {
3255                                 struct fbcon_ops *ops = info->fbcon_par;
3256
3257                                 fbcon_del_cursor_timer(info);
3258                                 kfree(ops->cursor_src);
3259                                 kfree(info->fbcon_par);
3260                                 info->fbcon_par = NULL;
3261                         }
3262
3263                         if (info->queue.func == fb_flashcursor)
3264                                 info->queue.func = NULL;
3265                 }
3266         }
3267
3268         fbcon_has_exited = 1;
3269 }
3270
3271 static int __init fb_console_init(void)
3272 {
3273         int i;
3274
3275         acquire_console_sem();
3276         fb_register_client(&fbcon_event_notifier);
3277         fbcon_class_device =
3278             class_device_create(fb_class, NULL, MKDEV(0, 0), NULL, "fbcon");
3279
3280         if (IS_ERR(fbcon_class_device)) {
3281                 printk(KERN_WARNING "Unable to create class_device "
3282                        "for fbcon; errno = %ld\n",
3283                        PTR_ERR(fbcon_class_device));
3284                 fbcon_class_device = NULL;
3285         } else
3286                 fbcon_init_class_device();
3287
3288         for (i = 0; i < MAX_NR_CONSOLES; i++)
3289                 con2fb_map[i] = -1;
3290
3291         release_console_sem();
3292         fbcon_start();
3293         return 0;
3294 }
3295
3296 module_init(fb_console_init);
3297
3298 #ifdef MODULE
3299
3300 static void __exit fbcon_deinit_class_device(void)
3301 {
3302         int i;
3303
3304         if (fbcon_has_sysfs) {
3305                 for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++)
3306                         class_device_remove_file(fbcon_class_device,
3307                                                  &class_device_attrs[i]);
3308
3309                 fbcon_has_sysfs = 0;
3310         }
3311 }
3312
3313 static void __exit fb_console_exit(void)
3314 {
3315         acquire_console_sem();
3316         fb_unregister_client(&fbcon_event_notifier);
3317         fbcon_deinit_class_device();
3318         class_device_destroy(fb_class, MKDEV(0, 0));
3319         fbcon_exit();
3320         release_console_sem();
3321         unregister_con_driver(&fb_con);
3322 }
3323
3324 module_exit(fb_console_exit);
3325
3326 #endif
3327
3328 MODULE_LICENSE("GPL");