SAFE public projects git trees. - safe/jmp/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/fb.h>
  79 #include <asm/irq.h>
  80 #include <asm/system.h>
  81 #include <asm/uaccess.h>
  82 #ifdef CONFIG_ATARI
  83 #include <asm/atariints.h>
  84 #endif
  85 #ifdef CONFIG_MAC
  86 #include <asm/macints.h>
  87 #endif
  88 #if defined(__mc68000__) || defined(CONFIG_APUS)
  89 #include <asm/machdep.h>
  90 #include <asm/setup.h>
  91 #endif
  92
  93 #include "fbcon.h"
  94
  95 #ifdef FBCONDEBUG
  96 #  define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __FUNCTION__ , ## args)
  97 #else
  98 #  define DPRINTK(fmt, args...)
  99 #endif
 100
 101 enum {
 102         FBCON_LOGO_CANSHOW      = -1,   /* the logo can be shown */
 103         FBCON_LOGO_DRAW         = -2,   /* draw the logo to a console */
 104         FBCON_LOGO_DONTSHOW     = -3    /* do not show the logo */
 105 };
 106
 107 static struct display fb_display[MAX_NR_CONSOLES];
 108
 109 static signed char con2fb_map[MAX_NR_CONSOLES];
 110 static signed char con2fb_map_boot[MAX_NR_CONSOLES];
 111 #ifndef MODULE
 112 static int logo_height;
 113 #endif
 114 static int logo_lines;
 115 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
 116    enums.  */
 117 static int logo_shown = FBCON_LOGO_CANSHOW;
 118 /* Software scrollback */
 119 static int fbcon_softback_size = 32768;
 120 static unsigned long softback_buf, softback_curr;
 121 static unsigned long softback_in;
 122 static unsigned long softback_top, softback_end;
 123 static int softback_lines;
 124 /* console mappings */
 125 static int first_fb_vc;
 126 static int last_fb_vc = MAX_NR_CONSOLES - 1;
 127 static int fbcon_is_default = 1;
 128 static int fbcon_has_exited;
 129 static int primary_device = -1;
 130 static int map_override;
 131
 132 /* font data */
 133 static char fontname[40];
 134
 135 /* current fb_info */
 136 static int info_idx = -1;
 137
 138 /* console rotation */
 139 static int rotate;
 140 static int fbcon_has_sysfs;
 141
 142 static const struct consw fb_con;
 143
 144 #define CM_SOFTBACK     (8)
 145
 146 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
 147
 148 static int fbcon_set_origin(struct vc_data *);
 149
 150 #define CURSOR_DRAW_DELAY               (1)
 151
 152 /* # VBL ints between cursor state changes */
 153 #define ATARI_CURSOR_BLINK_RATE         (42)
 154 #define MAC_CURSOR_BLINK_RATE           (32)
 155 #define DEFAULT_CURSOR_BLINK_RATE       (20)
 156
 157 static int vbl_cursor_cnt;
 158 static int fbcon_cursor_noblink;
 159
 160 #define divides(a, b)   ((!(a) || (b)%(a)) ? 0 : 1)
 161
 162 /*
 163  *  Interface used by the world
 164  */
 165
 166 static const char *fbcon_startup(void);
 167 static void fbcon_init(struct vc_data *vc, int init);
 168 static void fbcon_deinit(struct vc_data *vc);
 169 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
 170                         int width);
 171 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
 172 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
 173                         int count, int ypos, int xpos);
 174 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
 175 static void fbcon_cursor(struct vc_data *vc, int mode);
 176 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
 177                         int count);
 178 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
 179                         int height, int width);
 180 static int fbcon_switch(struct vc_data *vc);
 181 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
 182 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table);
 183 static int fbcon_scrolldelta(struct vc_data *vc, int lines);
 184
 185 /*
 186  *  Internal routines
 187  */
 188 static __inline__ void ywrap_up(struct vc_data *vc, int count);
 189 static __inline__ void ywrap_down(struct vc_data *vc, int count);
 190 static __inline__ void ypan_up(struct vc_data *vc, int count);
 191 static __inline__ void ypan_down(struct vc_data *vc, int count);
 192 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
 193                             int dy, int dx, int height, int width, u_int y_break);
 194 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
 195                            struct vc_data *vc);
 196 static void fbcon_preset_disp(struct fb_info *info, struct fb_var_screeninfo *var,
 197                               int unit);
 198 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
 199                               int line, int count, int dy);
 200 static void fbcon_modechanged(struct fb_info *info);
 201 static void fbcon_set_all_vcs(struct fb_info *info);
 202 static void fbcon_start(void);
 203 static void fbcon_exit(void);
 204 static struct device *fbcon_device;
 205
 206 #ifdef CONFIG_MAC
 207 /*
 208  * On the Macintoy, there may or may not be a working VBL int. We need to probe
 209  */
 210 static int vbl_detected;
 211
 212 static irqreturn_t fb_vbl_detect(int irq, void *dummy)
 213 {
 214         vbl_detected++;
 215         return IRQ_HANDLED;
 216 }
 217 #endif
 218
 219 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
 220 static inline void fbcon_set_rotation(struct fb_info *info)
 221 {
 222         struct fbcon_ops *ops = info->fbcon_par;
 223
 224         if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
 225             ops->p->con_rotate < 4)
 226                 ops->rotate = ops->p->con_rotate;
 227         else
 228                 ops->rotate = 0;
 229 }
 230
 231 static void fbcon_rotate(struct fb_info *info, u32 rotate)
 232 {
 233         struct fbcon_ops *ops= info->fbcon_par;
 234         struct fb_info *fb_info;
 235
 236         if (!ops || ops->currcon == -1)
 237                 return;
 238
 239         fb_info = registered_fb[con2fb_map[ops->currcon]];
 240
 241         if (info == fb_info) {
 242                 struct display *p = &fb_display[ops->currcon];
 243
 244                 if (rotate < 4)
 245                         p->con_rotate = rotate;
 246                 else
 247                         p->con_rotate = 0;
 248
 249                 fbcon_modechanged(info);
 250         }
 251 }
 252
 253 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
 254 {
 255         struct fbcon_ops *ops = info->fbcon_par;
 256         struct vc_data *vc;
 257         struct display *p;
 258         int i;
 259
 260         if (!ops || ops->currcon < 0 || rotate > 3)
 261                 return;
 262
 263         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 264                 vc = vc_cons[i].d;
 265                 if (!vc || vc->vc_mode != KD_TEXT ||
 266                     registered_fb[con2fb_map[i]] != info)
 267                         continue;
 268
 269                 p = &fb_display[vc->vc_num];
 270                 p->con_rotate = rotate;
 271         }
 272
 273         fbcon_set_all_vcs(info);
 274 }
 275 #else
 276 static inline void fbcon_set_rotation(struct fb_info *info)
 277 {
 278         struct fbcon_ops *ops = info->fbcon_par;
 279
 280         ops->rotate = FB_ROTATE_UR;
 281 }
 282
 283 static void fbcon_rotate(struct fb_info *info, u32 rotate)
 284 {
 285         return;
 286 }
 287
 288 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
 289 {
 290         return;
 291 }
 292 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
 293
 294 static int fbcon_get_rotate(struct fb_info *info)
 295 {
 296         struct fbcon_ops *ops = info->fbcon_par;
 297
 298         return (ops) ? ops->rotate : 0;
 299 }
 300
 301 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
 302 {
 303         struct fbcon_ops *ops = info->fbcon_par;
 304
 305         return (info->state != FBINFO_STATE_RUNNING ||
 306                 vc->vc_mode != KD_TEXT || ops->graphics);
 307 }
 308
 309 static inline int get_color(struct vc_data *vc, struct fb_info *info,
 310               u16 c, int is_fg)
 311 {
 312         int depth = fb_get_color_depth(&info->var, &info->fix);
 313         int color = 0;
 314
 315         if (console_blanked) {
 316                 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
 317
 318                 c = vc->vc_video_erase_char & charmask;
 319         }
 320
 321         if (depth != 1)
 322                 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
 323                         : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
 324
 325         switch (depth) {
 326         case 1:
 327         {
 328                 int col = ~(0xfff << (max(info->var.green.length,
 329                                           max(info->var.red.length,
 330                                               info->var.blue.length)))) & 0xff;
 331
 332                 /* 0 or 1 */
 333                 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
 334                 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
 335
 336                 if (console_blanked)
 337                         fg = bg;
 338
 339                 color = (is_fg) ? fg : bg;
 340                 break;
 341         }
 342         case 2:
 343                 /*
 344                  * Scale down 16-colors to 4 colors. Default 4-color palette
 345                  * is grayscale. However, simply dividing the values by 4
 346                  * will not work, as colors 1, 2 and 3 will be scaled-down
 347                  * to zero rendering them invisible.  So empirically convert
 348                  * colors to a sane 4-level grayscale.
 349                  */
 350                 switch (color) {
 351                 case 0:
 352                         color = 0; /* black */
 353                         break;
 354                 case 1 ... 6:
 355                         color = 2; /* white */
 356                         break;
 357                 case 7 ... 8:
 358                         color = 1; /* gray */
 359                         break;
 360                 default:
 361                         color = 3; /* intense white */
 362                         break;
 363                 }
 364                 break;
 365         case 3:
 366                 /*
 367                  * Last 8 entries of default 16-color palette is a more intense
 368                  * version of the first 8 (i.e., same chrominance, different
 369                  * luminance).
 370                  */
 371                 color &= 7;
 372                 break;
 373         }
 374
 375
 376         return color;
 377 }
 378
 379 static void fbcon_update_softback(struct vc_data *vc)
 380 {
 381         int l = fbcon_softback_size / vc->vc_size_row;
 382
 383         if (l > 5)
 384                 softback_end = softback_buf + l * vc->vc_size_row;
 385         else
 386                 /* Smaller scrollback makes no sense, and 0 would screw
 387                    the operation totally */
 388                 softback_top = 0;
 389 }
 390
 391 static void fb_flashcursor(struct work_struct *work)
 392 {
 393         struct fb_info *info = container_of(work, struct fb_info, queue);
 394         struct fbcon_ops *ops = info->fbcon_par;
 395         struct display *p;
 396         struct vc_data *vc = NULL;
 397         int c;
 398         int mode;
 399
 400         acquire_console_sem();
 401         if (ops && ops->currcon != -1)
 402                 vc = vc_cons[ops->currcon].d;
 403
 404         if (!vc || !CON_IS_VISIBLE(vc) ||
 405             registered_fb[con2fb_map[vc->vc_num]] != info ||
 406             vc->vc_deccm != 1) {
 407                 release_console_sem();
 408                 return;
 409         }
 410
 411         p = &fb_display[vc->vc_num];
 412         c = scr_readw((u16 *) vc->vc_pos);
 413         mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
 414                 CM_ERASE : CM_DRAW;
 415         ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
 416                     get_color(vc, info, c, 0));
 417         release_console_sem();
 418 }
 419
 420 #if defined(CONFIG_ATARI) || defined(CONFIG_MAC)
 421 static int cursor_blink_rate;
 422 static irqreturn_t fb_vbl_handler(int irq, void *dev_id)
 423 {
 424         struct fb_info *info = dev_id;
 425
 426         if (vbl_cursor_cnt && --vbl_cursor_cnt == 0) {
 427                 schedule_work(&info->queue);
 428                 vbl_cursor_cnt = cursor_blink_rate;
 429         }
 430         return IRQ_HANDLED;
 431 }
 432 #endif
 433
 434 static void cursor_timer_handler(unsigned long dev_addr)
 435 {
 436         struct fb_info *info = (struct fb_info *) dev_addr;
 437         struct fbcon_ops *ops = info->fbcon_par;
 438
 439         schedule_work(&info->queue);
 440         mod_timer(&ops->cursor_timer, jiffies + HZ/5);
 441 }
 442
 443 static void fbcon_add_cursor_timer(struct fb_info *info)
 444 {
 445         struct fbcon_ops *ops = info->fbcon_par;
 446
 447         if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
 448             !(ops->flags & FBCON_FLAGS_CURSOR_TIMER) &&
 449             !fbcon_cursor_noblink) {
 450                 if (!info->queue.func)
 451                         INIT_WORK(&info->queue, fb_flashcursor);
 452
 453                 init_timer(&ops->cursor_timer);
 454                 ops->cursor_timer.function = cursor_timer_handler;
 455                 ops->cursor_timer.expires = jiffies + HZ / 5;
 456                 ops->cursor_timer.data = (unsigned long ) info;
 457                 add_timer(&ops->cursor_timer);
 458                 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
 459         }
 460 }
 461
 462 static void fbcon_del_cursor_timer(struct fb_info *info)
 463 {
 464         struct fbcon_ops *ops = info->fbcon_par;
 465
 466         if (info->queue.func == fb_flashcursor &&
 467             ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
 468                 del_timer_sync(&ops->cursor_timer);
 469                 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
 470         }
 471 }
 472
 473 #ifndef MODULE
 474 static int __init fb_console_setup(char *this_opt)
 475 {
 476         char *options;
 477         int i, j;
 478
 479         if (!this_opt || !*this_opt)
 480                 return 1;
 481
 482         while ((options = strsep(&this_opt, ",")) != NULL) {
 483                 if (!strncmp(options, "font:", 5))
 484                         strcpy(fontname, options + 5);
 485
 486                 if (!strncmp(options, "scrollback:", 11)) {
 487                         options += 11;
 488                         if (*options) {
 489                                 fbcon_softback_size = simple_strtoul(options, &options, 0);
 490                                 if (*options == 'k' || *options == 'K') {
 491                                         fbcon_softback_size *= 1024;
 492                                         options++;
 493                                 }
 494                                 if (*options != ',')
 495                                         return 1;
 496                                 options++;
 497                         } else
 498                                 return 1;
 499                 }
 500
 501                 if (!strncmp(options, "map:", 4)) {
 502                         options += 4;
 503                         if (*options) {
 504                                 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
 505                                         if (!options[j])
 506                                                 j = 0;
 507                                         con2fb_map_boot[i] =
 508                                                 (options[j++]-'0') % FB_MAX;
 509                                 }
 510
 511                                 map_override = 1;
 512                         }
 513
 514                         return 1;
 515                 }
 516
 517                 if (!strncmp(options, "vc:", 3)) {
 518                         options += 3;
 519                         if (*options)
 520                                 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
 521                         if (first_fb_vc < 0)
 522                                 first_fb_vc = 0;
 523                         if (*options++ == '-')
 524                                 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
 525                         fbcon_is_default = 0;
 526                 }
 527
 528                 if (!strncmp(options, "rotate:", 7)) {
 529                         options += 7;
 530                         if (*options)
 531                                 rotate = simple_strtoul(options, &options, 0);
 532                         if (rotate > 3)
 533                                 rotate = 0;
 534                 }
 535         }
 536         return 1;
 537 }
 538
 539 __setup("fbcon=", fb_console_setup);
 540 #endif
 541
 542 static int search_fb_in_map(int idx)
 543 {
 544         int i, retval = 0;
 545
 546         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 547                 if (con2fb_map[i] == idx)
 548                         retval = 1;
 549         }
 550         return retval;
 551 }
 552
 553 static int search_for_mapped_con(void)
 554 {
 555         int i, retval = 0;
 556
 557         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 558                 if (con2fb_map[i] != -1)
 559                         retval = 1;
 560         }
 561         return retval;
 562 }
 563
 564 static int fbcon_takeover(int show_logo)
 565 {
 566         int err, i;
 567
 568         if (!num_registered_fb)
 569                 return -ENODEV;
 570
 571         if (!show_logo)
 572                 logo_shown = FBCON_LOGO_DONTSHOW;
 573
 574         for (i = first_fb_vc; i <= last_fb_vc; i++)
 575                 con2fb_map[i] = info_idx;
 576
 577         err = take_over_console(&fb_con, first_fb_vc, last_fb_vc,
 578                                 fbcon_is_default);
 579
 580         if (err) {
 581                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
 582                         con2fb_map[i] = -1;
 583                 }
 584                 info_idx = -1;
 585         }
 586
 587         return err;
 588 }
 589
 590 #ifdef MODULE
 591 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
 592                                int cols, int rows, int new_cols, int new_rows)
 593 {
 594         logo_shown = FBCON_LOGO_DONTSHOW;
 595 }
 596 #else
 597 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
 598                                int cols, int rows, int new_cols, int new_rows)
 599 {
 600         /* Need to make room for the logo */
 601         struct fbcon_ops *ops = info->fbcon_par;
 602         int cnt, erase = vc->vc_video_erase_char, step;
 603         unsigned short *save = NULL, *r, *q;
 604
 605         if (info->flags & FBINFO_MODULE) {
 606                 logo_shown = FBCON_LOGO_DONTSHOW;
 607                 return;
 608         }
 609
 610         /*
 611          * remove underline attribute from erase character
 612          * if black and white framebuffer.
 613          */
 614         if (fb_get_color_depth(&info->var, &info->fix) == 1)
 615                 erase &= ~0x400;
 616         logo_height = fb_prepare_logo(info, ops->rotate);
 617         logo_lines = (logo_height + vc->vc_font.height - 1) /
 618                 vc->vc_font.height;
 619         q = (unsigned short *) (vc->vc_origin +
 620                                 vc->vc_size_row * rows);
 621         step = logo_lines * cols;
 622         for (r = q - logo_lines * cols; r < q; r++)
 623                 if (scr_readw(r) != vc->vc_video_erase_char)
 624                         break;
 625         if (r != q && new_rows >= rows + logo_lines) {
 626                 save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
 627                 if (save) {
 628                         int i = cols < new_cols ? cols : new_cols;
 629                         scr_memsetw(save, erase, logo_lines * new_cols * 2);
 630                         r = q - step;
 631                         for (cnt = 0; cnt < logo_lines; cnt++, r += i)
 632                                 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
 633                         r = q;
 634                 }
 635         }
 636         if (r == q) {
 637                 /* We can scroll screen down */
 638                 r = q - step - cols;
 639                 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
 640                         scr_memcpyw(r + step, r, vc->vc_size_row);
 641                         r -= cols;
 642                 }
 643                 if (!save) {
 644                         int lines;
 645                         if (vc->vc_y + logo_lines >= rows)
 646                                 lines = rows - vc->vc_y - 1;
 647                         else
 648                                 lines = logo_lines;
 649                         vc->vc_y += lines;
 650                         vc->vc_pos += lines * vc->vc_size_row;
 651                 }
 652         }
 653         scr_memsetw((unsigned short *) vc->vc_origin,
 654                     erase,
 655                     vc->vc_size_row * logo_lines);
 656
 657         if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
 658                 fbcon_clear_margins(vc, 0);
 659                 update_screen(vc);
 660         }
 661
 662         if (save) {
 663                 q = (unsigned short *) (vc->vc_origin +
 664                                         vc->vc_size_row *
 665                                         rows);
 666                 scr_memcpyw(q, save, logo_lines * new_cols * 2);
 667                 vc->vc_y += logo_lines;
 668                 vc->vc_pos += logo_lines * vc->vc_size_row;
 669                 kfree(save);
 670         }
 671
 672         if (logo_lines > vc->vc_bottom) {
 673                 logo_shown = FBCON_LOGO_CANSHOW;
 674                 printk(KERN_INFO
 675                        "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
 676         } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
 677                 logo_shown = FBCON_LOGO_DRAW;
 678                 vc->vc_top = logo_lines;
 679         }
 680 }
 681 #endif /* MODULE */
 682
 683 #ifdef CONFIG_FB_TILEBLITTING
 684 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
 685 {
 686         struct fbcon_ops *ops = info->fbcon_par;
 687
 688         ops->p = &fb_display[vc->vc_num];
 689
 690         if ((info->flags & FBINFO_MISC_TILEBLITTING))
 691                 fbcon_set_tileops(vc, info);
 692         else {
 693                 fbcon_set_rotation(info);
 694                 fbcon_set_bitops(ops);
 695         }
 696 }
 697
 698 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
 699 {
 700         int err = 0;
 701
 702         if (info->flags & FBINFO_MISC_TILEBLITTING &&
 703             info->tileops->fb_get_tilemax(info) < charcount)
 704                 err = 1;
 705
 706         return err;
 707 }
 708 #else
 709 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
 710 {
 711         struct fbcon_ops *ops = info->fbcon_par;
 712
 713         info->flags &= ~FBINFO_MISC_TILEBLITTING;
 714         ops->p = &fb_display[vc->vc_num];
 715         fbcon_set_rotation(info);
 716         fbcon_set_bitops(ops);
 717 }
 718
 719 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
 720 {
 721         return 0;
 722 }
 723
 724 #endif /* CONFIG_MISC_TILEBLITTING */
 725
 726
 727 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
 728                                   int unit, int oldidx)
 729 {
 730         struct fbcon_ops *ops = NULL;
 731         int err = 0;
 732
 733         if (!try_module_get(info->fbops->owner))
 734                 err = -ENODEV;
 735
 736         if (!err && info->fbops->fb_open &&
 737             info->fbops->fb_open(info, 0))
 738                 err = -ENODEV;
 739
 740         if (!err) {
 741                 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
 742                 if (!ops)
 743                         err = -ENOMEM;
 744         }
 745
 746         if (!err) {
 747                 info->fbcon_par = ops;
 748                 set_blitting_type(vc, info);
 749         }
 750
 751         if (err) {
 752                 con2fb_map[unit] = oldidx;
 753                 module_put(info->fbops->owner);
 754         }
 755
 756         return err;
 757 }
 758
 759 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
 760                                   struct fb_info *newinfo, int unit,
 761                                   int oldidx, int found)
 762 {
 763         struct fbcon_ops *ops = oldinfo->fbcon_par;
 764         int err = 0;
 765
 766         if (oldinfo->fbops->fb_release &&
 767             oldinfo->fbops->fb_release(oldinfo, 0)) {
 768                 con2fb_map[unit] = oldidx;
 769                 if (!found && newinfo->fbops->fb_release)
 770                         newinfo->fbops->fb_release(newinfo, 0);
 771                 if (!found)
 772                         module_put(newinfo->fbops->owner);
 773                 err = -ENODEV;
 774         }
 775
 776         if (!err) {
 777                 fbcon_del_cursor_timer(oldinfo);
 778                 kfree(ops->cursor_state.mask);
 779                 kfree(ops->cursor_data);
 780                 kfree(ops->fontbuffer);
 781                 kfree(oldinfo->fbcon_par);
 782                 oldinfo->fbcon_par = NULL;
 783                 module_put(oldinfo->fbops->owner);
 784                 /*
 785                   If oldinfo and newinfo are driving the same hardware,
 786                   the fb_release() method of oldinfo may attempt to
 787                   restore the hardware state.  This will leave the
 788                   newinfo in an undefined state. Thus, a call to
 789                   fb_set_par() may be needed for the newinfo.
 790                 */
 791                 if (newinfo->fbops->fb_set_par)
 792                         newinfo->fbops->fb_set_par(newinfo);
 793         }
 794
 795         return err;
 796 }
 797
 798 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
 799                                 int unit, int show_logo)
 800 {
 801         struct fbcon_ops *ops = info->fbcon_par;
 802
 803         ops->currcon = fg_console;
 804
 805         if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT))
 806                 info->fbops->fb_set_par(info);
 807
 808         ops->flags |= FBCON_FLAGS_INIT;
 809         ops->graphics = 0;
 810
 811         if (vc)
 812                 fbcon_set_disp(info, &info->var, vc);
 813         else
 814                 fbcon_preset_disp(info, &info->var, unit);
 815
 816         if (show_logo) {
 817                 struct vc_data *fg_vc = vc_cons[fg_console].d;
 818                 struct fb_info *fg_info =
 819                         registered_fb[con2fb_map[fg_console]];
 820
 821                 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
 822                                    fg_vc->vc_rows, fg_vc->vc_cols,
 823                                    fg_vc->vc_rows);
 824         }
 825
 826         update_screen(vc_cons[fg_console].d);
 827 }
 828
 829 /**
 830  *      set_con2fb_map - map console to frame buffer device
 831  *      @unit: virtual console number to map
 832  *      @newidx: frame buffer index to map virtual console to
 833  *      @user: user request
 834  *
 835  *      Maps a virtual console @unit to a frame buffer device
 836  *      @newidx.
 837  */
 838 static int set_con2fb_map(int unit, int newidx, int user)
 839 {
 840         struct vc_data *vc = vc_cons[unit].d;
 841         int oldidx = con2fb_map[unit];
 842         struct fb_info *info = registered_fb[newidx];
 843         struct fb_info *oldinfo = NULL;
 844         int found, err = 0;
 845
 846         if (oldidx == newidx)
 847                 return 0;
 848
 849         if (!info || fbcon_has_exited)
 850                 return -EINVAL;
 851
 852         if (!err && !search_for_mapped_con()) {
 853                 info_idx = newidx;
 854                 return fbcon_takeover(0);
 855         }
 856
 857         if (oldidx != -1)
 858                 oldinfo = registered_fb[oldidx];
 859
 860         found = search_fb_in_map(newidx);
 861
 862         acquire_console_sem();
 863         con2fb_map[unit] = newidx;
 864         if (!err && !found)
 865                 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
 866
 867
 868         /*
 869          * If old fb is not mapped to any of the consoles,
 870          * fbcon should release it.
 871          */
 872         if (!err && oldinfo && !search_fb_in_map(oldidx))
 873                 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
 874                                              found);
 875
 876         if (!err) {
 877                 int show_logo = (fg_console == 0 && !user &&
 878                                  logo_shown != FBCON_LOGO_DONTSHOW);
 879
 880                 if (!found)
 881                         fbcon_add_cursor_timer(info);
 882                 con2fb_map_boot[unit] = newidx;
 883                 con2fb_init_display(vc, info, unit, show_logo);
 884         }
 885
 886         if (!search_fb_in_map(info_idx))
 887                 info_idx = newidx;
 888
 889         release_console_sem();
 890         return err;
 891 }
 892
 893 /*
 894  *  Low Level Operations
 895  */
 896 /* NOTE: fbcon cannot be __init: it may be called from take_over_console later */
 897 static int var_to_display(struct display *disp,
 898                           struct fb_var_screeninfo *var,
 899                           struct fb_info *info)
 900 {
 901         disp->xres_virtual = var->xres_virtual;
 902         disp->yres_virtual = var->yres_virtual;
 903         disp->bits_per_pixel = var->bits_per_pixel;
 904         disp->grayscale = var->grayscale;
 905         disp->nonstd = var->nonstd;
 906         disp->accel_flags = var->accel_flags;
 907         disp->height = var->height;
 908         disp->width = var->width;
 909         disp->red = var->red;
 910         disp->green = var->green;
 911         disp->blue = var->blue;
 912         disp->transp = var->transp;
 913         disp->rotate = var->rotate;
 914         disp->mode = fb_match_mode(var, &info->modelist);
 915         if (disp->mode == NULL)
 916                 /* This should not happen */
 917                 return -EINVAL;
 918         return 0;
 919 }
 920
 921 static void display_to_var(struct fb_var_screeninfo *var,
 922                            struct display *disp)
 923 {
 924         fb_videomode_to_var(var, disp->mode);
 925         var->xres_virtual = disp->xres_virtual;
 926         var->yres_virtual = disp->yres_virtual;
 927         var->bits_per_pixel = disp->bits_per_pixel;
 928         var->grayscale = disp->grayscale;
 929         var->nonstd = disp->nonstd;
 930         var->accel_flags = disp->accel_flags;
 931         var->height = disp->height;
 932         var->width = disp->width;
 933         var->red = disp->red;
 934         var->green = disp->green;
 935         var->blue = disp->blue;
 936         var->transp = disp->transp;
 937         var->rotate = disp->rotate;
 938 }
 939
 940 static const char *fbcon_startup(void)
 941 {
 942         const char *display_desc = "frame buffer device";
 943         struct display *p = &fb_display[fg_console];
 944         struct vc_data *vc = vc_cons[fg_console].d;
 945         const struct font_desc *font = NULL;
 946         struct module *owner;
 947         struct fb_info *info = NULL;
 948         struct fbcon_ops *ops;
 949         int rows, cols;
 950         int irqres;
 951
 952         irqres = 1;
 953         /*
 954          *  If num_registered_fb is zero, this is a call for the dummy part.
 955          *  The frame buffer devices weren't initialized yet.
 956          */
 957         if (!num_registered_fb || info_idx == -1)
 958                 return display_desc;
 959         /*
 960          * Instead of blindly using registered_fb[0], we use info_idx, set by
 961          * fb_console_init();
 962          */
 963         info = registered_fb[info_idx];
 964         if (!info)
 965                 return NULL;
 966
 967         owner = info->fbops->owner;
 968         if (!try_module_get(owner))
 969                 return NULL;
 970         if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
 971                 module_put(owner);
 972                 return NULL;
 973         }
 974
 975         ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
 976         if (!ops) {
 977                 module_put(owner);
 978                 return NULL;
 979         }
 980
 981         ops->currcon = -1;
 982         ops->graphics = 1;
 983         ops->cur_rotate = -1;
 984         info->fbcon_par = ops;
 985         p->con_rotate = rotate;
 986         set_blitting_type(vc, info);
 987
 988         if (info->fix.type != FB_TYPE_TEXT) {
 989                 if (fbcon_softback_size) {
 990                         if (!softback_buf) {
 991                                 softback_buf =
 992                                     (unsigned long)
 993                                     kmalloc(fbcon_softback_size,
 994                                             GFP_KERNEL);
 995                                 if (!softback_buf) {
 996                                         fbcon_softback_size = 0;
 997                                         softback_top = 0;
 998                                 }
 999                         }
1000                 } else {
1001                         if (softback_buf) {
1002                                 kfree((void *) softback_buf);
1003                                 softback_buf = 0;
1004                                 softback_top = 0;
1005                         }
1006                 }
1007                 if (softback_buf)
1008                         softback_in = softback_top = softback_curr =
1009                             softback_buf;
1010                 softback_lines = 0;
1011         }
1012
1013         /* Setup default font */
1014         if (!p->fontdata) {
1015                 if (!fontname[0] || !(font = find_font(fontname)))
1016                         font = get_default_font(info->var.xres,
1017                                                 info->var.yres,
1018                                                 info->pixmap.blit_x,
1019                                                 info->pixmap.blit_y);
1020                 vc->vc_font.width = font->width;
1021                 vc->vc_font.height = font->height;
1022                 vc->vc_font.data = (void *)(p->fontdata = font->data);
1023                 vc->vc_font.charcount = 256; /* FIXME  Need to support more fonts */
1024         }
1025
1026         cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1027         rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1028         cols /= vc->vc_font.width;
1029         rows /= vc->vc_font.height;
1030         vc_resize(vc, cols, rows);
1031
1032         DPRINTK("mode:   %s\n", info->fix.id);
1033         DPRINTK("visual: %d\n", info->fix.visual);
1034         DPRINTK("res:    %dx%d-%d\n", info->var.xres,
1035                 info->var.yres,
1036                 info->var.bits_per_pixel);
1037
1038 #ifdef CONFIG_ATARI
1039         if (MACH_IS_ATARI) {
1040                 cursor_blink_rate = ATARI_CURSOR_BLINK_RATE;
1041                 irqres =
1042                     request_irq(IRQ_AUTO_4, fb_vbl_handler,
1043                                 IRQ_TYPE_PRIO, "framebuffer vbl",
1044                                 info);
1045         }
1046 #endif                          /* CONFIG_ATARI */
1047
1048 #ifdef CONFIG_MAC
1049         /*
1050          * On a Macintoy, the VBL interrupt may or may not be active.
1051          * As interrupt based cursor is more reliable and race free, we
1052          * probe for VBL interrupts.
1053          */
1054         if (MACH_IS_MAC) {
1055                 int ct = 0;
1056                 /*
1057                  * Probe for VBL: set temp. handler ...
1058                  */
1059                 irqres = request_irq(IRQ_MAC_VBL, fb_vbl_detect, 0,
1060                                      "framebuffer vbl", info);
1061                 vbl_detected = 0;
1062
1063                 /*
1064                  * ... and spin for 20 ms ...
1065                  */
1066                 while (!vbl_detected && ++ct < 1000)
1067                         udelay(20);
1068
1069                 if (ct == 1000)
1070                         printk
1071                             ("fbcon_startup: No VBL detected, using timer based cursor.\n");
1072
1073                 free_irq(IRQ_MAC_VBL, fb_vbl_detect);
1074
1075                 if (vbl_detected) {
1076                         /*
1077                          * interrupt based cursor ok
1078                          */
1079                         cursor_blink_rate = MAC_CURSOR_BLINK_RATE;
1080                         irqres =
1081                             request_irq(IRQ_MAC_VBL, fb_vbl_handler, 0,
1082                                         "framebuffer vbl", info);
1083                 } else {
1084                         /*
1085                          * VBL not detected: fall through, use timer based cursor
1086                          */
1087                         irqres = 1;
1088                 }
1089         }
1090 #endif                          /* CONFIG_MAC */
1091
1092         fbcon_add_cursor_timer(info);
1093         fbcon_has_exited = 0;
1094         return display_desc;
1095 }
1096
1097 static void fbcon_init(struct vc_data *vc, int init)
1098 {
1099         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1100         struct fbcon_ops *ops;
1101         struct vc_data **default_mode = vc->vc_display_fg;
1102         struct vc_data *svc = *default_mode;
1103         struct display *t, *p = &fb_display[vc->vc_num];
1104         int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
1105         int cap;
1106
1107         if (info_idx == -1 || info == NULL)
1108             return;
1109
1110         cap = info->flags;
1111
1112         if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1113             (info->fix.type == FB_TYPE_TEXT))
1114                 logo = 0;
1115
1116         if (var_to_display(p, &info->var, info))
1117                 return;
1118
1119         /* If we are not the first console on this
1120            fb, copy the font from that console */
1121         t = &fb_display[fg_console];
1122         if (!p->fontdata) {
1123                 if (t->fontdata) {
1124                         struct vc_data *fvc = vc_cons[fg_console].d;
1125
1126                         vc->vc_font.data = (void *)(p->fontdata =
1127                                                     fvc->vc_font.data);
1128                         vc->vc_font.width = fvc->vc_font.width;
1129                         vc->vc_font.height = fvc->vc_font.height;
1130                         p->userfont = t->userfont;
1131
1132                         if (p->userfont)
1133                                 REFCOUNT(p->fontdata)++;
1134                 } else {
1135                         const struct font_desc *font = NULL;
1136
1137                         if (!fontname[0] || !(font = find_font(fontname)))
1138                                 font = get_default_font(info->var.xres,
1139                                                         info->var.yres,
1140                                                         info->pixmap.blit_x,
1141                                                         info->pixmap.blit_y);
1142                         vc->vc_font.width = font->width;
1143                         vc->vc_font.height = font->height;
1144                         vc->vc_font.data = (void *)(p->fontdata = font->data);
1145                         vc->vc_font.charcount = 256; /* FIXME  Need to
1146                                                         support more fonts */
1147                 }
1148         }
1149
1150         if (p->userfont)
1151                 charcnt = FNTCHARCNT(p->fontdata);
1152
1153         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1154         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1155         if (charcnt == 256) {
1156                 vc->vc_hi_font_mask = 0;
1157         } else {
1158                 vc->vc_hi_font_mask = 0x100;
1159                 if (vc->vc_can_do_color)
1160                         vc->vc_complement_mask <<= 1;
1161         }
1162
1163         if (!*svc->vc_uni_pagedir_loc)
1164                 con_set_default_unimap(svc);
1165         if (!*vc->vc_uni_pagedir_loc)
1166                 con_copy_unimap(vc, svc);
1167
1168         ops = info->fbcon_par;
1169         p->con_rotate = rotate;
1170         set_blitting_type(vc, info);
1171
1172         cols = vc->vc_cols;
1173         rows = vc->vc_rows;
1174         new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1175         new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1176         new_cols /= vc->vc_font.width;
1177         new_rows /= vc->vc_font.height;
1178         vc_resize(vc, new_cols, new_rows);
1179
1180         /*
1181          * We must always set the mode. The mode of the previous console
1182          * driver could be in the same resolution but we are using different
1183          * hardware so we have to initialize the hardware.
1184          *
1185          * We need to do it in fbcon_init() to prevent screen corruption.
1186          */
1187         if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
1188                 if (info->fbops->fb_set_par &&
1189                     !(ops->flags & FBCON_FLAGS_INIT))
1190                         info->fbops->fb_set_par(info);
1191                 ops->flags |= FBCON_FLAGS_INIT;
1192         }
1193
1194         ops->graphics = 0;
1195
1196         if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1197             !(cap & FBINFO_HWACCEL_DISABLED))
1198                 p->scrollmode = SCROLL_MOVE;
1199         else /* default to something safe */
1200                 p->scrollmode = SCROLL_REDRAW;
1201
1202         /*
1203          *  ++guenther: console.c:vc_allocate() relies on initializing
1204          *  vc_{cols,rows}, but we must not set those if we are only
1205          *  resizing the console.
1206          */
1207         if (!init) {
1208                 vc->vc_cols = new_cols;
1209                 vc->vc_rows = new_rows;
1210         }
1211
1212         if (logo)
1213                 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1214
1215         if (vc == svc && softback_buf)
1216                 fbcon_update_softback(vc);
1217
1218         if (ops->rotate_font && ops->rotate_font(info, vc)) {
1219                 ops->rotate = FB_ROTATE_UR;
1220                 set_blitting_type(vc, info);
1221         }
1222
1223         ops->p = &fb_display[fg_console];
1224 }
1225
1226 static void fbcon_free_font(struct display *p)
1227 {
1228         if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1229                 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1230         p->fontdata = NULL;
1231         p->userfont = 0;
1232 }
1233
1234 static void fbcon_deinit(struct vc_data *vc)
1235 {
1236         struct display *p = &fb_display[vc->vc_num];
1237         struct fb_info *info;
1238         struct fbcon_ops *ops;
1239         int idx;
1240
1241         fbcon_free_font(p);
1242         idx = con2fb_map[vc->vc_num];
1243
1244         if (idx == -1)
1245                 goto finished;
1246
1247         info = registered_fb[idx];
1248
1249         if (!info)
1250                 goto finished;
1251
1252         ops = info->fbcon_par;
1253
1254         if (!ops)
1255                 goto finished;
1256
1257         if (CON_IS_VISIBLE(vc))
1258                 fbcon_del_cursor_timer(info);
1259
1260         ops->flags &= ~FBCON_FLAGS_INIT;
1261 finished:
1262
1263         if (!con_is_bound(&fb_con))
1264                 fbcon_exit();
1265
1266         return;
1267 }
1268
1269 /* ====================================================================== */
1270
1271 /*  fbcon_XXX routines - interface used by the world
1272  *
1273  *  This system is now divided into two levels because of complications
1274  *  caused by hardware scrolling. Top level functions:
1275  *
1276  *      fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1277  *
1278  *  handles y values in range [0, scr_height-1] that correspond to real
1279  *  screen positions. y_wrap shift means that first line of bitmap may be
1280  *  anywhere on this display. These functions convert lineoffsets to
1281  *  bitmap offsets and deal with the wrap-around case by splitting blits.
1282  *
1283  *      fbcon_bmove_physical_8()    -- These functions fast implementations
1284  *      fbcon_clear_physical_8()    -- of original fbcon_XXX fns.
1285  *      fbcon_putc_physical_8()     -- (font width != 8) may be added later
1286  *
1287  *  WARNING:
1288  *
1289  *  At the moment fbcon_putc() cannot blit across vertical wrap boundary
1290  *  Implies should only really hardware scroll in rows. Only reason for
1291  *  restriction is simplicity & efficiency at the moment.
1292  */
1293
1294 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1295                         int width)
1296 {
1297         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1298         struct fbcon_ops *ops = info->fbcon_par;
1299
1300         struct display *p = &fb_display[vc->vc_num];
1301         u_int y_break;
1302
1303         if (fbcon_is_inactive(vc, info))
1304                 return;
1305
1306         if (!height || !width)
1307                 return;
1308
1309         /* Split blits that cross physical y_wrap boundary */
1310
1311         y_break = p->vrows - p->yscroll;
1312         if (sy < y_break && sy + height - 1 >= y_break) {
1313                 u_int b = y_break - sy;
1314                 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1315                 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1316                                  width);
1317         } else
1318                 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1319 }
1320
1321 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1322                         int count, int ypos, int xpos)
1323 {
1324         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1325         struct display *p = &fb_display[vc->vc_num];
1326         struct fbcon_ops *ops = info->fbcon_par;
1327
1328         if (!fbcon_is_inactive(vc, info))
1329                 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1330                            get_color(vc, info, scr_readw(s), 1),
1331                            get_color(vc, info, scr_readw(s), 0));
1332 }
1333
1334 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1335 {
1336         unsigned short chr;
1337
1338         scr_writew(c, &chr);
1339         fbcon_putcs(vc, &chr, 1, ypos, xpos);
1340 }
1341
1342 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1343 {
1344         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1345         struct fbcon_ops *ops = info->fbcon_par;
1346
1347         if (!fbcon_is_inactive(vc, info))
1348                 ops->clear_margins(vc, info, bottom_only);
1349 }
1350
1351 static void fbcon_cursor(struct vc_data *vc, int mode)
1352 {
1353         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1354         struct fbcon_ops *ops = info->fbcon_par;
1355         int y;
1356         int c = scr_readw((u16 *) vc->vc_pos);
1357
1358         if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
1359                 return;
1360
1361         if (vc->vc_cursor_type & 0x10)
1362                 fbcon_del_cursor_timer(info);
1363         else
1364                 fbcon_add_cursor_timer(info);
1365
1366         ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1367         if (mode & CM_SOFTBACK) {
1368                 mode &= ~CM_SOFTBACK;
1369                 y = softback_lines;
1370         } else {
1371                 if (softback_lines)
1372                         fbcon_set_origin(vc);
1373                 y = 0;
1374         }
1375
1376         ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
1377                     get_color(vc, info, c, 0));
1378         vbl_cursor_cnt = CURSOR_DRAW_DELAY;
1379 }
1380
1381 static int scrollback_phys_max = 0;
1382 static int scrollback_max = 0;
1383 static int scrollback_current = 0;
1384
1385 /*
1386  * If no vc is existent yet, just set struct display
1387  */
1388 static void fbcon_preset_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1389                               int unit)
1390 {
1391         struct display *p = &fb_display[unit];
1392         struct display *t = &fb_display[fg_console];
1393
1394         if (var_to_display(p, var, info))
1395                 return;
1396
1397         p->fontdata = t->fontdata;
1398         p->userfont = t->userfont;
1399         if (p->userfont)
1400                 REFCOUNT(p->fontdata)++;
1401 }
1402
1403 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1404                            struct vc_data *vc)
1405 {
1406         struct display *p = &fb_display[vc->vc_num], *t;
1407         struct vc_data **default_mode = vc->vc_display_fg;
1408         struct vc_data *svc = *default_mode;
1409         struct fbcon_ops *ops = info->fbcon_par;
1410         int rows, cols, charcnt = 256;
1411
1412         if (var_to_display(p, var, info))
1413                 return;
1414         t = &fb_display[svc->vc_num];
1415         if (!vc->vc_font.data) {
1416                 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1417                 vc->vc_font.width = (*default_mode)->vc_font.width;
1418                 vc->vc_font.height = (*default_mode)->vc_font.height;
1419                 p->userfont = t->userfont;
1420                 if (p->userfont)
1421                         REFCOUNT(p->fontdata)++;
1422         }
1423         if (p->userfont)
1424                 charcnt = FNTCHARCNT(p->fontdata);
1425
1426         var->activate = FB_ACTIVATE_NOW;
1427         info->var.activate = var->activate;
1428         var->yoffset = info->var.yoffset;
1429         var->xoffset = info->var.xoffset;
1430         fb_set_var(info, var);
1431         ops->var = info->var;
1432         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1433         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1434         if (charcnt == 256) {
1435                 vc->vc_hi_font_mask = 0;
1436         } else {
1437                 vc->vc_hi_font_mask = 0x100;
1438                 if (vc->vc_can_do_color)
1439                         vc->vc_complement_mask <<= 1;
1440         }
1441
1442         if (!*svc->vc_uni_pagedir_loc)
1443                 con_set_default_unimap(svc);
1444         if (!*vc->vc_uni_pagedir_loc)
1445                 con_copy_unimap(vc, svc);
1446
1447         cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1448         rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1449         cols /= vc->vc_font.width;
1450         rows /= vc->vc_font.height;
1451         vc_resize(vc, cols, rows);
1452
1453         if (CON_IS_VISIBLE(vc)) {
1454                 update_screen(vc);
1455                 if (softback_buf)
1456                         fbcon_update_softback(vc);
1457         }
1458 }
1459
1460 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1461 {
1462         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1463         struct fbcon_ops *ops = info->fbcon_par;
1464         struct display *p = &fb_display[vc->vc_num];
1465
1466         p->yscroll += count;
1467         if (p->yscroll >= p->vrows)     /* Deal with wrap */
1468                 p->yscroll -= p->vrows;
1469         ops->var.xoffset = 0;
1470         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1471         ops->var.vmode |= FB_VMODE_YWRAP;
1472         ops->update_start(info);
1473         scrollback_max += count;
1474         if (scrollback_max > scrollback_phys_max)
1475                 scrollback_max = scrollback_phys_max;
1476         scrollback_current = 0;
1477 }
1478
1479 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1480 {
1481         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1482         struct fbcon_ops *ops = info->fbcon_par;
1483         struct display *p = &fb_display[vc->vc_num];
1484
1485         p->yscroll -= count;
1486         if (p->yscroll < 0)     /* Deal with wrap */
1487                 p->yscroll += p->vrows;
1488         ops->var.xoffset = 0;
1489         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1490         ops->var.vmode |= FB_VMODE_YWRAP;
1491         ops->update_start(info);
1492         scrollback_max -= count;
1493         if (scrollback_max < 0)
1494                 scrollback_max = 0;
1495         scrollback_current = 0;
1496 }
1497
1498 static __inline__ void ypan_up(struct vc_data *vc, int count)
1499 {
1500         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1501         struct display *p = &fb_display[vc->vc_num];
1502         struct fbcon_ops *ops = info->fbcon_par;
1503
1504         p->yscroll += count;
1505         if (p->yscroll > p->vrows - vc->vc_rows) {
1506                 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1507                             0, 0, 0, vc->vc_rows, vc->vc_cols);
1508                 p->yscroll -= p->vrows - vc->vc_rows;
1509         }
1510
1511         ops->var.xoffset = 0;
1512         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1513         ops->var.vmode &= ~FB_VMODE_YWRAP;
1514         ops->update_start(info);
1515         fbcon_clear_margins(vc, 1);
1516         scrollback_max += count;
1517         if (scrollback_max > scrollback_phys_max)
1518                 scrollback_max = scrollback_phys_max;
1519         scrollback_current = 0;
1520 }
1521
1522 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1523 {
1524         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1525         struct fbcon_ops *ops = info->fbcon_par;
1526         struct display *p = &fb_display[vc->vc_num];
1527
1528         p->yscroll += count;
1529
1530         if (p->yscroll > p->vrows - vc->vc_rows) {
1531                 p->yscroll -= p->vrows - vc->vc_rows;
1532                 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1533         }
1534
1535         ops->var.xoffset = 0;
1536         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1537         ops->var.vmode &= ~FB_VMODE_YWRAP;
1538         ops->update_start(info);
1539         fbcon_clear_margins(vc, 1);
1540         scrollback_max += count;
1541         if (scrollback_max > scrollback_phys_max)
1542                 scrollback_max = scrollback_phys_max;
1543         scrollback_current = 0;
1544 }
1545
1546 static __inline__ void ypan_down(struct vc_data *vc, int count)
1547 {
1548         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1549         struct display *p = &fb_display[vc->vc_num];
1550         struct fbcon_ops *ops = info->fbcon_par;
1551
1552         p->yscroll -= count;
1553         if (p->yscroll < 0) {
1554                 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1555                             0, vc->vc_rows, vc->vc_cols);
1556                 p->yscroll += p->vrows - vc->vc_rows;
1557         }
1558
1559         ops->var.xoffset = 0;
1560         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1561         ops->var.vmode &= ~FB_VMODE_YWRAP;
1562         ops->update_start(info);
1563         fbcon_clear_margins(vc, 1);
1564         scrollback_max -= count;
1565         if (scrollback_max < 0)
1566                 scrollback_max = 0;
1567         scrollback_current = 0;
1568 }
1569
1570 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1571 {
1572         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1573         struct fbcon_ops *ops = info->fbcon_par;
1574         struct display *p = &fb_display[vc->vc_num];
1575
1576         p->yscroll -= count;
1577
1578         if (p->yscroll < 0) {
1579                 p->yscroll += p->vrows - vc->vc_rows;
1580                 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1581         }
1582
1583         ops->var.xoffset = 0;
1584         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1585         ops->var.vmode &= ~FB_VMODE_YWRAP;
1586         ops->update_start(info);
1587         fbcon_clear_margins(vc, 1);
1588         scrollback_max -= count;
1589         if (scrollback_max < 0)
1590                 scrollback_max = 0;
1591         scrollback_current = 0;
1592 }
1593
1594 static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1595                                   long delta)
1596 {
1597         int count = vc->vc_rows;
1598         unsigned short *d, *s;
1599         unsigned long n;
1600         int line = 0;
1601
1602         d = (u16 *) softback_curr;
1603         if (d == (u16 *) softback_in)
1604                 d = (u16 *) vc->vc_origin;
1605         n = softback_curr + delta * vc->vc_size_row;
1606         softback_lines -= delta;
1607         if (delta < 0) {
1608                 if (softback_curr < softback_top && n < softback_buf) {
1609                         n += softback_end - softback_buf;
1610                         if (n < softback_top) {
1611                                 softback_lines -=
1612                                     (softback_top - n) / vc->vc_size_row;
1613                                 n = softback_top;
1614                         }
1615                 } else if (softback_curr >= softback_top
1616                            && n < softback_top) {
1617                         softback_lines -=
1618                             (softback_top - n) / vc->vc_size_row;
1619                         n = softback_top;
1620                 }
1621         } else {
1622                 if (softback_curr > softback_in && n >= softback_end) {
1623                         n += softback_buf - softback_end;
1624                         if (n > softback_in) {
1625                                 n = softback_in;
1626                                 softback_lines = 0;
1627                         }
1628                 } else if (softback_curr <= softback_in && n > softback_in) {
1629                         n = softback_in;
1630                         softback_lines = 0;
1631                 }
1632         }
1633         if (n == softback_curr)
1634                 return;
1635         softback_curr = n;
1636         s = (u16 *) softback_curr;
1637         if (s == (u16 *) softback_in)
1638                 s = (u16 *) vc->vc_origin;
1639         while (count--) {
1640                 unsigned short *start;
1641                 unsigned short *le;
1642                 unsigned short c;
1643                 int x = 0;
1644                 unsigned short attr = 1;
1645
1646                 start = s;
1647                 le = advance_row(s, 1);
1648                 do {
1649                         c = scr_readw(s);
1650                         if (attr != (c & 0xff00)) {
1651                                 attr = c & 0xff00;
1652                                 if (s > start) {
1653                                         fbcon_putcs(vc, start, s - start,
1654                                                     line, x);
1655                                         x += s - start;
1656                                         start = s;
1657                                 }
1658                         }
1659                         if (c == scr_readw(d)) {
1660                                 if (s > start) {
1661                                         fbcon_putcs(vc, start, s - start,
1662                                                     line, x);
1663                                         x += s - start + 1;
1664                                         start = s + 1;
1665                                 } else {
1666                                         x++;
1667                                         start++;
1668                                 }
1669                         }
1670                         s++;
1671                         d++;
1672                 } while (s < le);
1673                 if (s > start)
1674                         fbcon_putcs(vc, start, s - start, line, x);
1675                 line++;
1676                 if (d == (u16 *) softback_end)
1677                         d = (u16 *) softback_buf;
1678                 if (d == (u16 *) softback_in)
1679                         d = (u16 *) vc->vc_origin;
1680                 if (s == (u16 *) softback_end)
1681                         s = (u16 *) softback_buf;
1682                 if (s == (u16 *) softback_in)
1683                         s = (u16 *) vc->vc_origin;
1684         }
1685 }
1686
1687 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1688                               int line, int count, int dy)
1689 {
1690         unsigned short *s = (unsigned short *)
1691                 (vc->vc_origin + vc->vc_size_row * line);
1692
1693         while (count--) {
1694                 unsigned short *start = s;
1695                 unsigned short *le = advance_row(s, 1);
1696                 unsigned short c;
1697                 int x = 0;
1698                 unsigned short attr = 1;
1699
1700                 do {
1701                         c = scr_readw(s);
1702                         if (attr != (c & 0xff00)) {
1703                                 attr = c & 0xff00;
1704                                 if (s > start) {
1705                                         fbcon_putcs(vc, start, s - start,
1706                                                     dy, x);
1707                                         x += s - start;
1708                                         start = s;
1709                                 }
1710                         }
1711                         console_conditional_schedule();
1712                         s++;
1713                 } while (s < le);
1714                 if (s > start)
1715                         fbcon_putcs(vc, start, s - start, dy, x);
1716                 console_conditional_schedule();
1717                 dy++;
1718         }
1719 }
1720
1721 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
1722                         struct display *p, int line, int count, int ycount)
1723 {
1724         int offset = ycount * vc->vc_cols;
1725         unsigned short *d = (unsigned short *)
1726             (vc->vc_origin + vc->vc_size_row * line);
1727         unsigned short *s = d + offset;
1728         struct fbcon_ops *ops = info->fbcon_par;
1729
1730         while (count--) {
1731                 unsigned short *start = s;
1732                 unsigned short *le = advance_row(s, 1);
1733                 unsigned short c;
1734                 int x = 0;
1735
1736                 do {
1737                         c = scr_readw(s);
1738
1739                         if (c == scr_readw(d)) {
1740                                 if (s > start) {
1741                                         ops->bmove(vc, info, line + ycount, x,
1742                                                    line, x, 1, s-start);
1743                                         x += s - start + 1;
1744                                         start = s + 1;
1745                                 } else {
1746                                         x++;
1747                                         start++;
1748                                 }
1749                         }
1750
1751                         scr_writew(c, d);
1752                         console_conditional_schedule();
1753                         s++;
1754                         d++;
1755                 } while (s < le);
1756                 if (s > start)
1757                         ops->bmove(vc, info, line + ycount, x, line, x, 1,
1758                                    s-start);
1759                 console_conditional_schedule();
1760                 if (ycount > 0)
1761                         line++;
1762                 else {
1763                         line--;
1764                         /* NOTE: We subtract two lines from these pointers */
1765                         s -= vc->vc_size_row;
1766                         d -= vc->vc_size_row;
1767                 }
1768         }
1769 }
1770
1771 static void fbcon_redraw(struct vc_data *vc, struct display *p,
1772                          int line, int count, int offset)
1773 {
1774         unsigned short *d = (unsigned short *)
1775             (vc->vc_origin + vc->vc_size_row * line);
1776         unsigned short *s = d + offset;
1777
1778         while (count--) {
1779                 unsigned short *start = s;
1780                 unsigned short *le = advance_row(s, 1);
1781                 unsigned short c;
1782                 int x = 0;
1783                 unsigned short attr = 1;
1784
1785                 do {
1786                         c = scr_readw(s);
1787                         if (attr != (c & 0xff00)) {
1788                                 attr = c & 0xff00;
1789                                 if (s > start) {
1790                                         fbcon_putcs(vc, start, s - start,
1791                                                     line, x);
1792                                         x += s - start;
1793                                         start = s;
1794                                 }
1795                         }
1796                         if (c == scr_readw(d)) {
1797                                 if (s > start) {
1798                                         fbcon_putcs(vc, start, s - start,
1799                                                      line, x);
1800                                         x += s - start + 1;
1801                                         start = s + 1;
1802                                 } else {
1803                                         x++;
1804                                         start++;
1805                                 }
1806                         }
1807                         scr_writew(c, d);
1808                         console_conditional_schedule();
1809                         s++;
1810                         d++;
1811                 } while (s < le);
1812                 if (s > start)
1813                         fbcon_putcs(vc, start, s - start, line, x);
1814                 console_conditional_schedule();
1815                 if (offset > 0)
1816                         line++;
1817                 else {
1818                         line--;
1819                         /* NOTE: We subtract two lines from these pointers */
1820                         s -= vc->vc_size_row;
1821                         d -= vc->vc_size_row;
1822                 }
1823         }
1824 }
1825
1826 static inline void fbcon_softback_note(struct vc_data *vc, int t,
1827                                        int count)
1828 {
1829         unsigned short *p;
1830
1831         if (vc->vc_num != fg_console)
1832                 return;
1833         p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1834
1835         while (count) {
1836                 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1837                 count--;
1838                 p = advance_row(p, 1);
1839                 softback_in += vc->vc_size_row;
1840                 if (softback_in == softback_end)
1841                         softback_in = softback_buf;
1842                 if (softback_in == softback_top) {
1843                         softback_top += vc->vc_size_row;
1844                         if (softback_top == softback_end)
1845                                 softback_top = softback_buf;
1846                 }
1847         }
1848         softback_curr = softback_in;
1849 }
1850
1851 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
1852                         int count)
1853 {
1854         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1855         struct display *p = &fb_display[vc->vc_num];
1856         int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1857
1858         if (fbcon_is_inactive(vc, info))
1859                 return -EINVAL;
1860
1861         fbcon_cursor(vc, CM_ERASE);
1862
1863         /*
1864          * ++Geert: Only use ywrap/ypan if the console is in text mode
1865          * ++Andrew: Only use ypan on hardware text mode when scrolling the
1866          *           whole screen (prevents flicker).
1867          */
1868
1869         switch (dir) {
1870         case SM_UP:
1871                 if (count > vc->vc_rows)        /* Maximum realistic size */
1872                         count = vc->vc_rows;
1873                 if (softback_top)
1874                         fbcon_softback_note(vc, t, count);
1875                 if (logo_shown >= 0)
1876                         goto redraw_up;
1877                 switch (p->scrollmode) {
1878                 case SCROLL_MOVE:
1879                         fbcon_redraw_blit(vc, info, p, t, b - t - count,
1880                                      count);
1881                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1882                         scr_memsetw((unsigned short *) (vc->vc_origin +
1883                                                         vc->vc_size_row *
1884                                                         (b - count)),
1885                                     vc->vc_video_erase_char,
1886                                     vc->vc_size_row * count);
1887                         return 1;
1888                         break;
1889
1890                 case SCROLL_WRAP_MOVE:
1891                         if (b - t - count > 3 * vc->vc_rows >> 2) {
1892                                 if (t > 0)
1893                                         fbcon_bmove(vc, 0, 0, count, 0, t,
1894                                                     vc->vc_cols);
1895                                 ywrap_up(vc, count);
1896                                 if (vc->vc_rows - b > 0)
1897                                         fbcon_bmove(vc, b - count, 0, b, 0,
1898                                                     vc->vc_rows - b,
1899                                                     vc->vc_cols);
1900                         } else if (info->flags & FBINFO_READS_FAST)
1901                                 fbcon_bmove(vc, t + count, 0, t, 0,
1902                                             b - t - count, vc->vc_cols);
1903                         else
1904                                 goto redraw_up;
1905                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1906                         break;
1907
1908                 case SCROLL_PAN_REDRAW:
1909                         if ((p->yscroll + count <=
1910                              2 * (p->vrows - vc->vc_rows))
1911                             && ((!scroll_partial && (b - t == vc->vc_rows))
1912                                 || (scroll_partial
1913                                     && (b - t - count >
1914                                         3 * vc->vc_rows >> 2)))) {
1915                                 if (t > 0)
1916                                         fbcon_redraw_move(vc, p, 0, t, count);
1917                                 ypan_up_redraw(vc, t, count);
1918                                 if (vc->vc_rows - b > 0)
1919                                         fbcon_redraw_move(vc, p, b,
1920                                                           vc->vc_rows - b, b);
1921                         } else
1922                                 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1923                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1924                         break;
1925
1926                 case SCROLL_PAN_MOVE:
1927                         if ((p->yscroll + count <=
1928                              2 * (p->vrows - vc->vc_rows))
1929                             && ((!scroll_partial && (b - t == vc->vc_rows))
1930                                 || (scroll_partial
1931                                     && (b - t - count >
1932                                         3 * vc->vc_rows >> 2)))) {
1933                                 if (t > 0)
1934                                         fbcon_bmove(vc, 0, 0, count, 0, t,
1935                                                     vc->vc_cols);
1936                                 ypan_up(vc, count);
1937                                 if (vc->vc_rows - b > 0)
1938                                         fbcon_bmove(vc, b - count, 0, b, 0,
1939                                                     vc->vc_rows - b,
1940                                                     vc->vc_cols);
1941                         } else if (info->flags & FBINFO_READS_FAST)
1942                                 fbcon_bmove(vc, t + count, 0, t, 0,
1943                                             b - t - count, vc->vc_cols);
1944                         else
1945                                 goto redraw_up;
1946                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1947                         break;
1948
1949                 case SCROLL_REDRAW:
1950                       redraw_up:
1951                         fbcon_redraw(vc, p, t, b - t - count,
1952                                      count * vc->vc_cols);
1953                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1954                         scr_memsetw((unsigned short *) (vc->vc_origin +
1955                                                         vc->vc_size_row *
1956                                                         (b - count)),
1957                                     vc->vc_video_erase_char,
1958                                     vc->vc_size_row * count);
1959                         return 1;
1960                 }
1961                 break;
1962
1963         case SM_DOWN:
1964                 if (count > vc->vc_rows)        /* Maximum realistic size */
1965                         count = vc->vc_rows;
1966                 if (logo_shown >= 0)
1967                         goto redraw_down;
1968                 switch (p->scrollmode) {
1969                 case SCROLL_MOVE:
1970                         fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,
1971                                      -count);
1972                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1973                         scr_memsetw((unsigned short *) (vc->vc_origin +
1974                                                         vc->vc_size_row *
1975                                                         t),
1976                                     vc->vc_video_erase_char,
1977                                     vc->vc_size_row * count);
1978                         return 1;
1979                         break;
1980
1981                 case SCROLL_WRAP_MOVE:
1982                         if (b - t - count > 3 * vc->vc_rows >> 2) {
1983                                 if (vc->vc_rows - b > 0)
1984                                         fbcon_bmove(vc, b, 0, b - count, 0,
1985                                                     vc->vc_rows - b,
1986                                                     vc->vc_cols);
1987                                 ywrap_down(vc, count);
1988                                 if (t > 0)
1989                                         fbcon_bmove(vc, count, 0, 0, 0, t,
1990                                                     vc->vc_cols);
1991                         } else if (info->flags & FBINFO_READS_FAST)
1992                                 fbcon_bmove(vc, t, 0, t + count, 0,
1993                                             b - t - count, vc->vc_cols);
1994                         else
1995                                 goto redraw_down;
1996                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1997                         break;
1998
1999                 case SCROLL_PAN_MOVE:
2000                         if ((count - p->yscroll <= p->vrows - vc->vc_rows)
2001                             && ((!scroll_partial && (b - t == vc->vc_rows))
2002                                 || (scroll_partial
2003                                     && (b - t - count >
2004                                         3 * vc->vc_rows >> 2)))) {
2005                                 if (vc->vc_rows - b > 0)
2006                                         fbcon_bmove(vc, b, 0, b - count, 0,
2007                                                     vc->vc_rows - b,
2008                                                     vc->vc_cols);
2009                                 ypan_down(vc, count);
2010                                 if (t > 0)
2011                                         fbcon_bmove(vc, count, 0, 0, 0, t,
2012                                                     vc->vc_cols);
2013                         } else if (info->flags & FBINFO_READS_FAST)
2014                                 fbcon_bmove(vc, t, 0, t + count, 0,
2015                                             b - t - count, vc->vc_cols);
2016                         else
2017                                 goto redraw_down;
2018                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
2019                         break;
2020
2021                 case SCROLL_PAN_REDRAW:
2022                         if ((count - p->yscroll <= p->vrows - vc->vc_rows)
2023                             && ((!scroll_partial && (b - t == vc->vc_rows))
2024                                 || (scroll_partial
2025                                     && (b - t - count >
2026                                         3 * vc->vc_rows >> 2)))) {
2027                                 if (vc->vc_rows - b > 0)
2028                                         fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
2029                                                           b - count);
2030                                 ypan_down_redraw(vc, t, count);
2031                                 if (t > 0)
2032                                         fbcon_redraw_move(vc, p, count, t, 0);
2033                         } else
2034                                 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
2035                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
2036                         break;
2037
2038                 case SCROLL_REDRAW:
2039                       redraw_down:
2040                         fbcon_redraw(vc, p, b - 1, b - t - count,
2041                                      -count * vc->vc_cols);
2042                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
2043                         scr_memsetw((unsigned short *) (vc->vc_origin +
2044                                                         vc->vc_size_row *
2045                                                         t),
2046                                     vc->vc_video_erase_char,
2047                                     vc->vc_size_row * count);
2048                         return 1;
2049                 }
2050         }
2051         return 0;
2052 }
2053
2054
2055 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
2056                         int height, int width)
2057 {
2058         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2059         struct display *p = &fb_display[vc->vc_num];
2060
2061         if (fbcon_is_inactive(vc, info))
2062                 return;
2063
2064         if (!width || !height)
2065                 return;
2066
2067         /*  Split blits that cross physical y_wrap case.
2068          *  Pathological case involves 4 blits, better to use recursive
2069          *  code rather than unrolled case
2070          *
2071          *  Recursive invocations don't need to erase the cursor over and
2072          *  over again, so we use fbcon_bmove_rec()
2073          */
2074         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
2075                         p->vrows - p->yscroll);
2076 }
2077
2078 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
2079                             int dy, int dx, int height, int width, u_int y_break)
2080 {
2081         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2082         struct fbcon_ops *ops = info->fbcon_par;
2083         u_int b;
2084
2085         if (sy < y_break && sy + height > y_break) {
2086                 b = y_break - sy;
2087                 if (dy < sy) {  /* Avoid trashing self */
2088                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2089                                         y_break);
2090                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2091                                         height - b, width, y_break);
2092                 } else {
2093                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2094                                         height - b, width, y_break);
2095                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2096                                         y_break);
2097                 }
2098                 return;
2099         }
2100
2101         if (dy < y_break && dy + height > y_break) {
2102                 b = y_break - dy;
2103                 if (dy < sy) {  /* Avoid trashing self */
2104                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2105                                         y_break);
2106                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2107                                         height - b, width, y_break);
2108                 } else {
2109                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2110                                         height - b, width, y_break);
2111                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2112                                         y_break);
2113                 }
2114                 return;
2115         }
2116         ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
2117                    height, width);
2118 }
2119
2120 static __inline__ void updatescrollmode(struct display *p,
2121                                         struct fb_info *info,
2122                                         struct vc_data *vc)
2123 {
2124         struct fbcon_ops *ops = info->fbcon_par;
2125         int fh = vc->vc_font.height;
2126         int cap = info->flags;
2127         u16 t = 0;
2128         int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
2129                                   info->fix.xpanstep);
2130         int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
2131         int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2132         int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
2133                                    info->var.xres_virtual);
2134         int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
2135                 divides(ypan, vc->vc_font.height) && vyres > yres;
2136         int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
2137                 divides(ywrap, vc->vc_font.height) &&
2138                 divides(vc->vc_font.height, vyres) &&
2139                 divides(vc->vc_font.height, yres);
2140         int reading_fast = cap & FBINFO_READS_FAST;
2141         int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
2142                 !(cap & FBINFO_HWACCEL_DISABLED);
2143         int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
2144                 !(cap & FBINFO_HWACCEL_DISABLED);
2145
2146         p->vrows = vyres/fh;
2147         if (yres > (fh * (vc->vc_rows + 1)))
2148                 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2149         if ((yres % fh) && (vyres % fh < yres % fh))
2150                 p->vrows--;
2151
2152         if (good_wrap || good_pan) {
2153                 if (reading_fast || fast_copyarea)
2154                         p->scrollmode = good_wrap ?
2155                                 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
2156                 else
2157                         p->scrollmode = good_wrap ? SCROLL_REDRAW :
2158                                 SCROLL_PAN_REDRAW;
2159         } else {
2160                 if (reading_fast || (fast_copyarea && !fast_imageblit))
2161                         p->scrollmode = SCROLL_MOVE;
2162                 else
2163                         p->scrollmode = SCROLL_REDRAW;
2164         }
2165 }
2166
2167 static int fbcon_resize(struct vc_data *vc, unsigned int width,
2168                         unsigned int height)
2169 {
2170         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2171         struct fbcon_ops *ops = info->fbcon_par;
2172         struct display *p = &fb_display[vc->vc_num];
2173         struct fb_var_screeninfo var = info->var;
2174         int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2175
2176         virt_w = FBCON_SWAP(ops->rotate, width, height);
2177         virt_h = FBCON_SWAP(ops->rotate, height, width);
2178         virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2179                                  vc->vc_font.height);
2180         virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2181                                  vc->vc_font.width);
2182         var.xres = virt_w * virt_fw;
2183         var.yres = virt_h * virt_fh;
2184         x_diff = info->var.xres - var.xres;
2185         y_diff = info->var.yres - var.yres;
2186         if (x_diff < 0 || x_diff > virt_fw ||
2187             y_diff < 0 || y_diff > virt_fh) {
2188                 const struct fb_videomode *mode;
2189
2190                 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2191                 mode = fb_find_best_mode(&var, &info->modelist);
2192                 if (mode == NULL)
2193                         return -EINVAL;
2194                 display_to_var(&var, p);
2195                 fb_videomode_to_var(&var, mode);
2196
2197                 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2198                         return -EINVAL;
2199
2200                 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2201                 if (CON_IS_VISIBLE(vc)) {
2202                         var.activate = FB_ACTIVATE_NOW |
2203                                 FB_ACTIVATE_FORCE;
2204                         fb_set_var(info, &var);
2205                 }
2206                 var_to_display(p, &info->var, info);
2207                 ops->var = info->var;
2208         }
2209         updatescrollmode(p, info, vc);
2210         return 0;
2211 }
2212
2213 static int fbcon_switch(struct vc_data *vc)
2214 {
2215         struct fb_info *info, *old_info = NULL;
2216         struct fbcon_ops *ops;
2217         struct display *p = &fb_display[vc->vc_num];
2218         struct fb_var_screeninfo var;
2219         int i, prev_console, charcnt = 256;
2220
2221         info = registered_fb[con2fb_map[vc->vc_num]];
2222         ops = info->fbcon_par;
2223
2224         if (softback_top) {
2225                 if (softback_lines)
2226                         fbcon_set_origin(vc);
2227                 softback_top = softback_curr = softback_in = softback_buf;
2228                 softback_lines = 0;
2229                 fbcon_update_softback(vc);
2230         }
2231
2232         if (logo_shown >= 0) {
2233                 struct vc_data *conp2 = vc_cons[logo_shown].d;
2234
2235                 if (conp2->vc_top == logo_lines
2236                     && conp2->vc_bottom == conp2->vc_rows)
2237                         conp2->vc_top = 0;
2238                 logo_shown = FBCON_LOGO_CANSHOW;
2239         }
2240
2241         prev_console = ops->currcon;
2242         if (prev_console != -1)
2243                 old_info = registered_fb[con2fb_map[prev_console]];
2244         /*
2245          * FIXME: If we have multiple fbdev's loaded, we need to
2246          * update all info->currcon.  Perhaps, we can place this
2247          * in a centralized structure, but this might break some
2248          * drivers.
2249          *
2250          * info->currcon = vc->vc_num;
2251          */
2252         for (i = 0; i < FB_MAX; i++) {
2253                 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
2254                         struct fbcon_ops *o = registered_fb[i]->fbcon_par;
2255
2256                         o->currcon = vc->vc_num;
2257                 }
2258         }
2259         memset(&var, 0, sizeof(struct fb_var_screeninfo));
2260         display_to_var(&var, p);
2261         var.activate = FB_ACTIVATE_NOW;
2262
2263         /*
2264          * make sure we don't unnecessarily trip the memcmp()
2265          * in fb_set_var()
2266          */
2267         info->var.activate = var.activate;
2268         var.yoffset = info->var.yoffset;
2269         var.xoffset = info->var.xoffset;
2270         var.vmode = info->var.vmode;
2271         fb_set_var(info, &var);
2272         ops->var = info->var;
2273
2274         if (old_info != NULL && (old_info != info ||
2275                                  info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2276                 if (info->fbops->fb_set_par)
2277                         info->fbops->fb_set_par(info);
2278
2279                 if (old_info != info)
2280                         fbcon_del_cursor_timer(old_info);
2281         }
2282
2283         if (fbcon_is_inactive(vc, info) ||
2284             ops->blank_state != FB_BLANK_UNBLANK)
2285                 fbcon_del_cursor_timer(info);
2286         else
2287                 fbcon_add_cursor_timer(info);
2288
2289         set_blitting_type(vc, info);
2290         ops->cursor_reset = 1;
2291
2292         if (ops->rotate_font && ops->rotate_font(info, vc)) {
2293                 ops->rotate = FB_ROTATE_UR;
2294                 set_blitting_type(vc, info);
2295         }
2296
2297         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2298         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2299
2300         if (p->userfont)
2301                 charcnt = FNTCHARCNT(vc->vc_font.data);
2302
2303         if (charcnt > 256)
2304                 vc->vc_complement_mask <<= 1;
2305
2306         updatescrollmode(p, info, vc);
2307
2308         switch (p->scrollmode) {
2309         case SCROLL_WRAP_MOVE:
2310                 scrollback_phys_max = p->vrows - vc->vc_rows;
2311                 break;
2312         case SCROLL_PAN_MOVE:
2313         case SCROLL_PAN_REDRAW:
2314                 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2315                 if (scrollback_phys_max < 0)
2316                         scrollback_phys_max = 0;
2317                 break;
2318         default:
2319                 scrollback_phys_max = 0;
2320                 break;
2321         }
2322
2323         scrollback_max = 0;
2324         scrollback_current = 0;
2325
2326         if (!fbcon_is_inactive(vc, info)) {
2327             ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2328             ops->update_start(info);
2329         }
2330
2331         fbcon_set_palette(vc, color_table);
2332         fbcon_clear_margins(vc, 0);
2333
2334         if (logo_shown == FBCON_LOGO_DRAW) {
2335
2336                 logo_shown = fg_console;
2337                 /* This is protected above by initmem_freed */
2338                 fb_show_logo(info, ops->rotate);
2339                 update_region(vc,
2340                               vc->vc_origin + vc->vc_size_row * vc->vc_top,
2341                               vc->vc_size_row * (vc->vc_bottom -
2342                                                  vc->vc_top) / 2);
2343                 return 0;
2344         }
2345         return 1;
2346 }
2347
2348 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2349                                 int blank)
2350 {
2351         struct fb_event event;
2352
2353         if (blank) {
2354                 unsigned short charmask = vc->vc_hi_font_mask ?
2355                         0x1ff : 0xff;
2356                 unsigned short oldc;
2357
2358                 oldc = vc->vc_video_erase_char;
2359                 vc->vc_video_erase_char &= charmask;
2360                 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2361                 vc->vc_video_erase_char = oldc;
2362         }
2363
2364
2365         event.info = info;
2366         event.data = &blank;
2367         fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
2368 }
2369
2370 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2371 {
2372         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2373         struct fbcon_ops *ops = info->fbcon_par;
2374
2375         if (mode_switch) {
2376                 struct fb_var_screeninfo var = info->var;
2377
2378                 ops->graphics = 1;
2379
2380                 if (!blank) {
2381                         if (info->fbops->fb_save_state)
2382                                 info->fbops->fb_save_state(info);
2383                         var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2384                         fb_set_var(info, &var);
2385                         ops->graphics = 0;
2386                         ops->var = info->var;
2387                 } else if (info->fbops->fb_restore_state)
2388                         info->fbops->fb_restore_state(info);
2389         }
2390
2391         if (!fbcon_is_inactive(vc, info)) {
2392                 if (ops->blank_state != blank) {
2393                         ops->blank_state = blank;
2394                         fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2395                         ops->cursor_flash = (!blank);
2396
2397                         if (fb_blank(info, blank))
2398                                 fbcon_generic_blank(vc, info, blank);
2399                 }
2400
2401                 if (!blank)
2402                         update_screen(vc);
2403         }
2404
2405         if (fbcon_is_inactive(vc, info) ||
2406             ops->blank_state != FB_BLANK_UNBLANK)
2407                 fbcon_del_cursor_timer(info);
2408         else
2409                 fbcon_add_cursor_timer(info);
2410
2411         return 0;
2412 }
2413
2414 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2415 {
2416         u8 *fontdata = vc->vc_font.data;
2417         u8 *data = font->data;
2418         int i, j;
2419
2420         font->width = vc->vc_font.width;
2421         font->height = vc->vc_font.height;
2422         font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2423         if (!font->data)
2424                 return 0;
2425
2426         if (font->width <= 8) {
2427                 j = vc->vc_font.height;
2428                 for (i = 0; i < font->charcount; i++) {
2429                         memcpy(data, fontdata, j);
2430                         memset(data + j, 0, 32 - j);
2431                         data += 32;
2432                         fontdata += j;
2433                 }
2434         } else if (font->width <= 16) {
2435                 j = vc->vc_font.height * 2;
2436                 for (i = 0; i < font->charcount; i++) {
2437                         memcpy(data, fontdata, j);
2438                         memset(data + j, 0, 64 - j);
2439                         data += 64;
2440                         fontdata += j;
2441                 }
2442         } else if (font->width <= 24) {
2443                 for (i = 0; i < font->charcount; i++) {
2444                         for (j = 0; j < vc->vc_font.height; j++) {
2445                                 *data++ = fontdata[0];
2446                                 *data++ = fontdata[1];
2447                                 *data++ = fontdata[2];
2448                                 fontdata += sizeof(u32);
2449                         }
2450                         memset(data, 0, 3 * (32 - j));
2451                         data += 3 * (32 - j);
2452                 }
2453         } else {
2454                 j = vc->vc_font.height * 4;
2455                 for (i = 0; i < font->charcount; i++) {
2456                         memcpy(data, fontdata, j);
2457                         memset(data + j, 0, 128 - j);
2458                         data += 128;
2459                         fontdata += j;
2460                 }
2461         }
2462         return 0;
2463 }
2464
2465 static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2466                              const u8 * data, int userfont)
2467 {
2468         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2469         struct fbcon_ops *ops = info->fbcon_par;
2470         struct display *p = &fb_display[vc->vc_num];
2471         int resize;
2472         int cnt;
2473         char *old_data = NULL;
2474
2475         if (CON_IS_VISIBLE(vc) && softback_lines)
2476                 fbcon_set_origin(vc);
2477
2478         resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2479         if (p->userfont)
2480                 old_data = vc->vc_font.data;
2481         if (userfont)
2482                 cnt = FNTCHARCNT(data);
2483         else
2484                 cnt = 256;
2485         vc->vc_font.data = (void *)(p->fontdata = data);
2486         if ((p->userfont = userfont))
2487                 REFCOUNT(data)++;
2488         vc->vc_font.width = w;
2489         vc->vc_font.height = h;
2490         if (vc->vc_hi_font_mask && cnt == 256) {
2491                 vc->vc_hi_font_mask = 0;
2492                 if (vc->vc_can_do_color) {
2493                         vc->vc_complement_mask >>= 1;
2494                         vc->vc_s_complement_mask >>= 1;
2495                 }
2496
2497                 /* ++Edmund: reorder the attribute bits */
2498                 if (vc->vc_can_do_color) {
2499                         unsigned short *cp =
2500                             (unsigned short *) vc->vc_origin;
2501                         int count = vc->vc_screenbuf_size / 2;
2502                         unsigned short c;
2503                         for (; count > 0; count--, cp++) {
2504                                 c = scr_readw(cp);
2505                                 scr_writew(((c & 0xfe00) >> 1) |
2506                                            (c & 0xff), cp);
2507                         }
2508                         c = vc->vc_video_erase_char;
2509                         vc->vc_video_erase_char =
2510                             ((c & 0xfe00) >> 1) | (c & 0xff);
2511                         vc->vc_attr >>= 1;
2512                 }
2513         } else if (!vc->vc_hi_font_mask && cnt == 512) {
2514                 vc->vc_hi_font_mask = 0x100;
2515                 if (vc->vc_can_do_color) {
2516                         vc->vc_complement_mask <<= 1;
2517                         vc->vc_s_complement_mask <<= 1;
2518                 }
2519
2520                 /* ++Edmund: reorder the attribute bits */
2521                 {
2522                         unsigned short *cp =
2523                             (unsigned short *) vc->vc_origin;
2524                         int count = vc->vc_screenbuf_size / 2;
2525                         unsigned short c;
2526                         for (; count > 0; count--, cp++) {
2527                                 unsigned short newc;
2528                                 c = scr_readw(cp);
2529                                 if (vc->vc_can_do_color)
2530                                         newc =
2531                                             ((c & 0xff00) << 1) | (c &
2532                                                                    0xff);
2533                                 else
2534                                         newc = c & ~0x100;
2535                                 scr_writew(newc, cp);
2536                         }
2537                         c = vc->vc_video_erase_char;
2538                         if (vc->vc_can_do_color) {
2539                                 vc->vc_video_erase_char =
2540                                     ((c & 0xff00) << 1) | (c & 0xff);
2541                                 vc->vc_attr <<= 1;
2542                         } else
2543                                 vc->vc_video_erase_char = c & ~0x100;
2544                 }
2545
2546         }
2547
2548         if (resize) {
2549                 int cols, rows;
2550
2551                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2552                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2553                 cols /= w;
2554                 rows /= h;
2555                 vc_resize(vc, cols, rows);
2556                 if (CON_IS_VISIBLE(vc) && softback_buf)
2557                         fbcon_update_softback(vc);
2558         } else if (CON_IS_VISIBLE(vc)
2559                    && vc->vc_mode == KD_TEXT) {
2560                 fbcon_clear_margins(vc, 0);
2561                 update_screen(vc);
2562         }
2563
2564         if (old_data && (--REFCOUNT(old_data) == 0))
2565                 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2566         return 0;
2567 }
2568
2569 static int fbcon_copy_font(struct vc_data *vc, int con)
2570 {
2571         struct display *od = &fb_display[con];
2572         struct console_font *f = &vc->vc_font;
2573
2574         if (od->fontdata == f->data)
2575                 return 0;       /* already the same font... */
2576         return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2577 }
2578
2579 /*
2580  *  User asked to set font; we are guaranteed that
2581  *      a) width and height are in range 1..32
2582  *      b) charcount does not exceed 512
2583  *  but lets not assume that, since someone might someday want to use larger
2584  *  fonts. And charcount of 512 is small for unicode support.
2585  *
2586  *  However, user space gives the font in 32 rows , regardless of
2587  *  actual font height. So a new API is needed if support for larger fonts
2588  *  is ever implemented.
2589  */
2590
2591 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2592 {
2593         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2594         unsigned charcount = font->charcount;
2595         int w = font->width;
2596         int h = font->height;
2597         int size;
2598         int i, csum;
2599         u8 *new_data, *data = font->data;
2600         int pitch = (font->width+7) >> 3;
2601
2602         /* Is there a reason why fbconsole couldn't handle any charcount >256?
2603          * If not this check should be changed to charcount < 256 */
2604         if (charcount != 256 && charcount != 512)
2605                 return -EINVAL;
2606
2607         /* Make sure drawing engine can handle the font */
2608         if (!(info->pixmap.blit_x & (1 << (font->width - 1))) ||
2609             !(info->pixmap.blit_y & (1 << (font->height - 1))))
2610                 return -EINVAL;
2611
2612         /* Make sure driver can handle the font length */
2613         if (fbcon_invalid_charcount(info, charcount))
2614                 return -EINVAL;
2615
2616         size = h * pitch * charcount;
2617
2618         new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2619
2620         if (!new_data)
2621                 return -ENOMEM;
2622
2623         new_data += FONT_EXTRA_WORDS * sizeof(int);
2624         FNTSIZE(new_data) = size;
2625         FNTCHARCNT(new_data) = charcount;
2626         REFCOUNT(new_data) = 0; /* usage counter */
2627         for (i=0; i< charcount; i++) {
2628                 memcpy(new_data + i*h*pitch, data +  i*32*pitch, h*pitch);
2629         }
2630
2631         /* Since linux has a nice crc32 function use it for counting font
2632          * checksums. */
2633         csum = crc32(0, new_data, size);
2634
2635         FNTSUM(new_data) = csum;
2636         /* Check if the same font is on some other console already */
2637         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2638                 struct vc_data *tmp = vc_cons[i].d;
2639
2640                 if (fb_display[i].userfont &&
2641                     fb_display[i].fontdata &&
2642                     FNTSUM(fb_display[i].fontdata) == csum &&
2643                     FNTSIZE(fb_display[i].fontdata) == size &&
2644                     tmp->vc_font.width == w &&
2645                     !memcmp(fb_display[i].fontdata, new_data, size)) {
2646                         kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2647                         new_data = (u8 *)fb_display[i].fontdata;
2648                         break;
2649                 }
2650         }
2651         return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2652 }
2653
2654 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2655 {
2656         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2657         const struct font_desc *f;
2658
2659         if (!name)
2660                 f = get_default_font(info->var.xres, info->var.yres,
2661                                      info->pixmap.blit_x, info->pixmap.blit_y);
2662         else if (!(f = find_font(name)))
2663                 return -ENOENT;
2664
2665         font->width = f->width;
2666         font->height = f->height;
2667         return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2668 }
2669
2670 static u16 palette_red[16];
2671 static u16 palette_green[16];
2672 static u16 palette_blue[16];
2673
2674 static struct fb_cmap palette_cmap = {
2675         0, 16, palette_red, palette_green, palette_blue, NULL
2676 };
2677
2678 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
2679 {
2680         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2681         int i, j, k, depth;
2682         u8 val;
2683
2684         if (fbcon_is_inactive(vc, info))
2685                 return -EINVAL;
2686
2687         if (!CON_IS_VISIBLE(vc))
2688                 return 0;
2689
2690         depth = fb_get_color_depth(&info->var, &info->fix);
2691         if (depth > 3) {
2692                 for (i = j = 0; i < 16; i++) {
2693                         k = table[i];
2694                         val = vc->vc_palette[j++];
2695                         palette_red[k] = (val << 8) | val;
2696                         val = vc->vc_palette[j++];
2697                         palette_green[k] = (val << 8) | val;
2698                         val = vc->vc_palette[j++];
2699                         palette_blue[k] = (val << 8) | val;
2700                 }
2701                 palette_cmap.len = 16;
2702                 palette_cmap.start = 0;
2703         /*
2704          * If framebuffer is capable of less than 16 colors,
2705          * use default palette of fbcon.
2706          */
2707         } else
2708                 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2709
2710         return fb_set_cmap(&palette_cmap, info);
2711 }
2712
2713 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2714 {
2715         unsigned long p;
2716         int line;
2717
2718         if (vc->vc_num != fg_console || !softback_lines)
2719                 return (u16 *) (vc->vc_origin + offset);
2720         line = offset / vc->vc_size_row;
2721         if (line >= softback_lines)
2722                 return (u16 *) (vc->vc_origin + offset -
2723                                 softback_lines * vc->vc_size_row);
2724         p = softback_curr + offset;
2725         if (p >= softback_end)
2726                 p += softback_buf - softback_end;
2727         return (u16 *) p;
2728 }
2729
2730 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2731                                  int *px, int *py)
2732 {
2733         unsigned long ret;
2734         int x, y;
2735
2736         if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2737                 unsigned long offset = (pos - vc->vc_origin) / 2;
2738
2739                 x = offset % vc->vc_cols;
2740                 y = offset / vc->vc_cols;
2741                 if (vc->vc_num == fg_console)
2742                         y += softback_lines;
2743                 ret = pos + (vc->vc_cols - x) * 2;
2744         } else if (vc->vc_num == fg_console && softback_lines) {
2745                 unsigned long offset = pos - softback_curr;
2746
2747                 if (pos < softback_curr)
2748                         offset += softback_end - softback_buf;
2749                 offset /= 2;
2750                 x = offset % vc->vc_cols;
2751                 y = offset / vc->vc_cols;
2752                 ret = pos + (vc->vc_cols - x) * 2;
2753                 if (ret == softback_end)
2754                         ret = softback_buf;
2755                 if (ret == softback_in)
2756                         ret = vc->vc_origin;
2757         } else {
2758                 /* Should not happen */
2759                 x = y = 0;
2760                 ret = vc->vc_origin;
2761         }
2762         if (px)
2763                 *px = x;
2764         if (py)
2765                 *py = y;
2766         return ret;
2767 }
2768
2769 /* As we might be inside of softback, we may work with non-contiguous buffer,
2770    that's why we have to use a separate routine. */
2771 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2772 {
2773         while (cnt--) {
2774                 u16 a = scr_readw(p);
2775                 if (!vc->vc_can_do_color)
2776                         a ^= 0x0800;
2777                 else if (vc->vc_hi_font_mask == 0x100)
2778                         a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2779                             (((a) & 0x0e00) << 4);
2780                 else
2781                         a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2782                             (((a) & 0x0700) << 4);
2783                 scr_writew(a, p++);
2784                 if (p == (u16 *) softback_end)
2785                         p = (u16 *) softback_buf;
2786                 if (p == (u16 *) softback_in)
2787                         p = (u16 *) vc->vc_origin;
2788         }
2789 }
2790
2791 static int fbcon_scrolldelta(struct vc_data *vc, int lines)
2792 {
2793         struct fb_info *info = registered_fb[con2fb_map[fg_console]];
2794         struct fbcon_ops *ops = info->fbcon_par;
2795         struct display *p = &fb_display[fg_console];
2796         int offset, limit, scrollback_old;
2797
2798         if (softback_top) {
2799                 if (vc->vc_num != fg_console)
2800                         return 0;
2801                 if (vc->vc_mode != KD_TEXT || !lines)
2802                         return 0;
2803                 if (logo_shown >= 0) {
2804                         struct vc_data *conp2 = vc_cons[logo_shown].d;
2805
2806                         if (conp2->vc_top == logo_lines
2807                             && conp2->vc_bottom == conp2->vc_rows)
2808                                 conp2->vc_top = 0;
2809                         if (logo_shown == vc->vc_num) {
2810                                 unsigned long p, q;
2811                                 int i;
2812
2813                                 p = softback_in;
2814                                 q = vc->vc_origin +
2815                                     logo_lines * vc->vc_size_row;
2816                                 for (i = 0; i < logo_lines; i++) {
2817                                         if (p == softback_top)
2818                                                 break;
2819                                         if (p == softback_buf)
2820                                                 p = softback_end;
2821                                         p -= vc->vc_size_row;
2822                                         q -= vc->vc_size_row;
2823                                         scr_memcpyw((u16 *) q, (u16 *) p,
2824                                                     vc->vc_size_row);
2825                                 }
2826                                 softback_in = softback_curr = p;
2827                                 update_region(vc, vc->vc_origin,
2828                                               logo_lines * vc->vc_cols);
2829                         }
2830                         logo_shown = FBCON_LOGO_CANSHOW;
2831                 }
2832                 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2833                 fbcon_redraw_softback(vc, p, lines);
2834                 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2835                 return 0;
2836         }
2837
2838         if (!scrollback_phys_max)
2839                 return -ENOSYS;
2840
2841         scrollback_old = scrollback_current;
2842         scrollback_current -= lines;
2843         if (scrollback_current < 0)
2844                 scrollback_current = 0;
2845         else if (scrollback_current > scrollback_max)
2846                 scrollback_current = scrollback_max;
2847         if (scrollback_current == scrollback_old)
2848                 return 0;
2849
2850         if (fbcon_is_inactive(vc, info))
2851                 return 0;
2852
2853         fbcon_cursor(vc, CM_ERASE);
2854
2855         offset = p->yscroll - scrollback_current;
2856         limit = p->vrows;
2857         switch (p->scrollmode) {
2858         case SCROLL_WRAP_MOVE:
2859                 info->var.vmode |= FB_VMODE_YWRAP;
2860                 break;
2861         case SCROLL_PAN_MOVE:
2862         case SCROLL_PAN_REDRAW:
2863                 limit -= vc->vc_rows;
2864                 info->var.vmode &= ~FB_VMODE_YWRAP;
2865                 break;
2866         }
2867         if (offset < 0)
2868                 offset += limit;
2869         else if (offset >= limit)
2870                 offset -= limit;
2871
2872         ops->var.xoffset = 0;
2873         ops->var.yoffset = offset * vc->vc_font.height;
2874         ops->update_start(info);
2875
2876         if (!scrollback_current)
2877                 fbcon_cursor(vc, CM_DRAW);
2878         return 0;
2879 }
2880
2881 static int fbcon_set_origin(struct vc_data *vc)
2882 {
2883         if (softback_lines)
2884                 fbcon_scrolldelta(vc, softback_lines);
2885         return 0;
2886 }
2887
2888 static void fbcon_suspended(struct fb_info *info)
2889 {
2890         struct vc_data *vc = NULL;
2891         struct fbcon_ops *ops = info->fbcon_par;
2892
2893         if (!ops || ops->currcon < 0)
2894                 return;
2895         vc = vc_cons[ops->currcon].d;
2896
2897         /* Clear cursor, restore saved data */
2898         fbcon_cursor(vc, CM_ERASE);
2899 }
2900
2901 static void fbcon_resumed(struct fb_info *info)
2902 {
2903         struct vc_data *vc;
2904         struct fbcon_ops *ops = info->fbcon_par;
2905
2906         if (!ops || ops->currcon < 0)
2907                 return;
2908         vc = vc_cons[ops->currcon].d;
2909
2910         update_screen(vc);
2911 }
2912
2913 static void fbcon_modechanged(struct fb_info *info)
2914 {
2915         struct fbcon_ops *ops = info->fbcon_par;
2916         struct vc_data *vc;
2917         struct display *p;
2918         int rows, cols;
2919
2920         if (!ops || ops->currcon < 0)
2921                 return;
2922         vc = vc_cons[ops->currcon].d;
2923         if (vc->vc_mode != KD_TEXT ||
2924             registered_fb[con2fb_map[ops->currcon]] != info)
2925                 return;
2926
2927         p = &fb_display[vc->vc_num];
2928         set_blitting_type(vc, info);
2929
2930         if (CON_IS_VISIBLE(vc)) {
2931                 var_to_display(p, &info->var, info);
2932                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2933                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2934                 cols /= vc->vc_font.width;
2935                 rows /= vc->vc_font.height;
2936                 vc_resize(vc, cols, rows);
2937                 updatescrollmode(p, info, vc);
2938                 scrollback_max = 0;
2939                 scrollback_current = 0;
2940
2941                 if (!fbcon_is_inactive(vc, info)) {
2942                     ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2943                     ops->update_start(info);
2944                 }
2945
2946                 fbcon_set_palette(vc, color_table);
2947                 update_screen(vc);
2948                 if (softback_buf)
2949                         fbcon_update_softback(vc);
2950         }
2951 }
2952
2953 static void fbcon_set_all_vcs(struct fb_info *info)
2954 {
2955         struct fbcon_ops *ops = info->fbcon_par;
2956         struct vc_data *vc;
2957         struct display *p;
2958         int i, rows, cols, fg = -1;
2959
2960         if (!ops || ops->currcon < 0)
2961                 return;
2962
2963         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2964                 vc = vc_cons[i].d;
2965                 if (!vc || vc->vc_mode != KD_TEXT ||
2966                     registered_fb[con2fb_map[i]] != info)
2967                         continue;
2968
2969                 if (CON_IS_VISIBLE(vc)) {
2970                         fg = i;
2971                         continue;
2972                 }
2973
2974                 p = &fb_display[vc->vc_num];
2975                 set_blitting_type(vc, info);
2976                 var_to_display(p, &info->var, info);
2977                 cols = FBCON_SWAP(p->rotate, info->var.xres, info->var.yres);
2978                 rows = FBCON_SWAP(p->rotate, info->var.yres, info->var.xres);
2979                 cols /= vc->vc_font.width;
2980                 rows /= vc->vc_font.height;
2981                 vc_resize(vc, cols, rows);
2982         }
2983
2984         if (fg != -1)
2985                 fbcon_modechanged(info);
2986 }
2987
2988 static int fbcon_mode_deleted(struct fb_info *info,
2989                               struct fb_videomode *mode)
2990 {
2991         struct fb_info *fb_info;
2992         struct display *p;
2993         int i, j, found = 0;
2994
2995         /* before deletion, ensure that mode is not in use */
2996         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2997                 j = con2fb_map[i];
2998                 if (j == -1)
2999                         continue;
3000                 fb_info = registered_fb[j];
3001                 if (fb_info != info)
3002                         continue;
3003                 p = &fb_display[i];
3004                 if (!p || !p->mode)
3005                         continue;
3006                 if (fb_mode_is_equal(p->mode, mode)) {
3007                         found = 1;
3008                         break;
3009                 }
3010         }
3011         return found;
3012 }
3013
3014 static int fbcon_fb_unregistered(struct fb_info *info)
3015 {
3016         int i, idx = info->node;
3017
3018         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3019                 if (con2fb_map[i] == idx)
3020                         con2fb_map[i] = -1;
3021         }
3022
3023         if (idx == info_idx) {
3024                 info_idx = -1;
3025
3026                 for (i = 0; i < FB_MAX; i++) {
3027                         if (registered_fb[i] != NULL) {
3028                                 info_idx = i;
3029                                 break;
3030                         }
3031                 }
3032         }
3033
3034         if (info_idx != -1) {
3035                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3036                         if (con2fb_map[i] == -1)
3037                                 con2fb_map[i] = info_idx;
3038                 }
3039         }
3040
3041         if (!num_registered_fb)
3042                 unregister_con_driver(&fb_con);
3043
3044
3045         if (primary_device == idx)
3046                 primary_device = -1;
3047
3048         return 0;
3049 }
3050
3051 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
3052 static int fbcon_select_primary(struct fb_info *info)
3053 {
3054         int ret = 0;
3055
3056         if (!map_override && primary_device == -1 &&
3057             fb_is_primary_device(info)) {
3058                 int i, err;
3059
3060                 printk(KERN_INFO "fbcon: %s is primary device\n",
3061                        info->fix.id);
3062                 primary_device = info->node;
3063
3064                 if (!con_is_bound(&fb_con))
3065                         goto done;
3066
3067                 printk(KERN_INFO "fbcon: Unbinding old driver\n");
3068                 unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
3069                                   fbcon_is_default);
3070                 info_idx = primary_device;
3071
3072                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3073                         con2fb_map_boot[i] = primary_device;
3074                         con2fb_map[i] = primary_device;
3075                 }
3076
3077                 printk(KERN_INFO "fbcon: Selecting new driver\n");
3078                 err = bind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
3079                                       fbcon_is_default);
3080
3081                 if (err) {
3082                         for (i = first_fb_vc; i <= last_fb_vc; i++)
3083                                 con2fb_map[i] = -1;
3084
3085                         info_idx = -1;
3086                 }
3087
3088                 ret = 1;
3089         }
3090
3091 done:
3092         return ret;
3093 }
3094 #else
3095 static inline int fbcon_select_primary(struct fb_info *info)
3096 {
3097         return 0;
3098 }
3099 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
3100
3101 static int fbcon_fb_registered(struct fb_info *info)
3102 {
3103         int ret = 0, i, idx = info->node;
3104
3105         if (fbcon_select_primary(info))
3106                 goto done;
3107
3108
3109         if (info_idx == -1) {
3110                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3111                         if (con2fb_map_boot[i] == idx) {
3112                                 info_idx = idx;
3113                                 break;
3114                         }
3115                 }
3116
3117                 if (info_idx != -1)
3118                         ret = fbcon_takeover(1);
3119         } else {
3120                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3121                         if (con2fb_map_boot[i] == idx &&
3122                             con2fb_map[i] == -1)
3123                                 set_con2fb_map(i, idx, 0);
3124                 }
3125         }
3126
3127 done:
3128         return ret;
3129 }
3130
3131 static void fbcon_fb_blanked(struct fb_info *info, int blank)
3132 {
3133         struct fbcon_ops *ops = info->fbcon_par;
3134         struct vc_data *vc;
3135
3136         if (!ops || ops->currcon < 0)
3137                 return;
3138
3139         vc = vc_cons[ops->currcon].d;
3140         if (vc->vc_mode != KD_TEXT ||
3141                         registered_fb[con2fb_map[ops->currcon]] != info)
3142                 return;
3143
3144         if (CON_IS_VISIBLE(vc)) {
3145                 if (blank)
3146                         do_blank_screen(0);
3147                 else
3148                         do_unblank_screen(0);
3149         }
3150         ops->blank_state = blank;
3151 }
3152
3153 static void fbcon_new_modelist(struct fb_info *info)
3154 {
3155         int i;
3156         struct vc_data *vc;
3157         struct fb_var_screeninfo var;
3158         const struct fb_videomode *mode;
3159
3160         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3161                 if (registered_fb[con2fb_map[i]] != info)
3162                         continue;
3163                 if (!fb_display[i].mode)
3164                         continue;
3165                 vc = vc_cons[i].d;
3166                 display_to_var(&var, &fb_display[i]);
3167                 mode = fb_find_nearest_mode(fb_display[i].mode,
3168                                             &info->modelist);
3169                 fb_videomode_to_var(&var, mode);
3170
3171                 if (vc)
3172                         fbcon_set_disp(info, &var, vc);
3173                 else
3174                         fbcon_preset_disp(info, &var, i);
3175
3176         }
3177 }
3178
3179 static void fbcon_get_requirement(struct fb_info *info,
3180                                   struct fb_blit_caps *caps)
3181 {
3182         struct vc_data *vc;
3183         struct display *p;
3184
3185         if (caps->flags) {
3186                 int i, charcnt;
3187
3188                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3189                         vc = vc_cons[i].d;
3190                         if (vc && vc->vc_mode == KD_TEXT &&
3191                             info->node == con2fb_map[i]) {
3192                                 p = &fb_display[i];
3193                                 caps->x |= 1 << (vc->vc_font.width - 1);
3194                                 caps->y |= 1 << (vc->vc_font.height - 1);
3195                                 charcnt = (p->userfont) ?
3196                                         FNTCHARCNT(p->fontdata) : 256;
3197                                 if (caps->len < charcnt)
3198                                         caps->len = charcnt;
3199                         }
3200                 }
3201         } else {
3202                 vc = vc_cons[fg_console].d;
3203
3204                 if (vc && vc->vc_mode == KD_TEXT &&
3205                     info->node == con2fb_map[fg_console]) {
3206                         p = &fb_display[fg_console];
3207                         caps->x = 1 << (vc->vc_font.width - 1);
3208                         caps->y = 1 << (vc->vc_font.height - 1);
3209                         caps->len = (p->userfont) ?
3210                                 FNTCHARCNT(p->fontdata) : 256;
3211                 }
3212         }
3213 }
3214
3215 static int fbcon_event_notify(struct notifier_block *self,
3216                               unsigned long action, void *data)
3217 {
3218         struct fb_event *event = data;
3219         struct fb_info *info = event->info;
3220         struct fb_videomode *mode;
3221         struct fb_con2fbmap *con2fb;
3222         struct fb_blit_caps *caps;
3223         int ret = 0;
3224
3225         /*
3226          * ignore all events except driver registration and deregistration
3227          * if fbcon is not active
3228          */
3229         if (fbcon_has_exited && !(action == FB_EVENT_FB_REGISTERED ||
3230                                   action == FB_EVENT_FB_UNREGISTERED))
3231                 goto done;
3232
3233         switch(action) {
3234         case FB_EVENT_SUSPEND:
3235                 fbcon_suspended(info);
3236                 break;
3237         case FB_EVENT_RESUME:
3238                 fbcon_resumed(info);
3239                 break;
3240         case FB_EVENT_MODE_CHANGE:
3241                 fbcon_modechanged(info);
3242                 break;
3243         case FB_EVENT_MODE_CHANGE_ALL:
3244                 fbcon_set_all_vcs(info);
3245                 break;
3246         case FB_EVENT_MODE_DELETE:
3247                 mode = event->data;
3248                 ret = fbcon_mode_deleted(info, mode);
3249                 break;
3250         case FB_EVENT_FB_REGISTERED:
3251                 ret = fbcon_fb_registered(info);
3252                 break;
3253         case FB_EVENT_FB_UNREGISTERED:
3254                 ret = fbcon_fb_unregistered(info);
3255                 break;
3256         case FB_EVENT_SET_CONSOLE_MAP:
3257                 con2fb = event->data;
3258                 ret = set_con2fb_map(con2fb->console - 1,
3259                                      con2fb->framebuffer, 1);
3260                 break;
3261         case FB_EVENT_GET_CONSOLE_MAP:
3262                 con2fb = event->data;
3263                 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
3264                 break;
3265         case FB_EVENT_BLANK:
3266                 fbcon_fb_blanked(info, *(int *)event->data);
3267                 break;
3268         case FB_EVENT_NEW_MODELIST:
3269                 fbcon_new_modelist(info);
3270                 break;
3271         case FB_EVENT_GET_REQ:
3272                 caps = event->data;
3273                 fbcon_get_requirement(info, caps);
3274                 break;
3275         }
3276
3277 done:
3278         return ret;
3279 }
3280
3281 /*
3282  *  The console `switch' structure for the frame buffer based console
3283  */
3284
3285 static const struct consw fb_con = {
3286         .owner                  = THIS_MODULE,
3287         .con_startup            = fbcon_startup,
3288         .con_init               = fbcon_init,
3289         .con_deinit             = fbcon_deinit,
3290         .con_clear              = fbcon_clear,
3291         .con_putc               = fbcon_putc,
3292         .con_putcs              = fbcon_putcs,
3293         .con_cursor             = fbcon_cursor,
3294         .con_scroll             = fbcon_scroll,
3295         .con_bmove              = fbcon_bmove,
3296         .con_switch             = fbcon_switch,
3297         .con_blank              = fbcon_blank,
3298         .con_font_set           = fbcon_set_font,
3299         .con_font_get           = fbcon_get_font,
3300         .con_font_default       = fbcon_set_def_font,
3301         .con_font_copy          = fbcon_copy_font,
3302         .con_set_palette        = fbcon_set_palette,
3303         .con_scrolldelta        = fbcon_scrolldelta,
3304         .con_set_origin         = fbcon_set_origin,
3305         .con_invert_region      = fbcon_invert_region,
3306         .con_screen_pos         = fbcon_screen_pos,
3307         .con_getxy              = fbcon_getxy,
3308         .con_resize             = fbcon_resize,
3309 };
3310
3311 static struct notifier_block fbcon_event_notifier = {
3312         .notifier_call  = fbcon_event_notify,
3313 };
3314
3315 static ssize_t store_rotate(struct device *device,
3316                             struct device_attribute *attr, const char *buf,
3317                             size_t count)
3318 {
3319         struct fb_info *info;
3320         int rotate, idx;
3321         char **last = NULL;
3322
3323         if (fbcon_has_exited)
3324                 return count;
3325
3326         acquire_console_sem();
3327         idx = con2fb_map[fg_console];
3328
3329         if (idx == -1 || registered_fb[idx] == NULL)
3330                 goto err;
3331
3332         info = registered_fb[idx];
3333         rotate = simple_strtoul(buf, last, 0);
3334         fbcon_rotate(info, rotate);
3335 err:
3336         release_console_sem();
3337         return count;
3338 }
3339
3340 static ssize_t store_rotate_all(struct device *device,
3341                                 struct device_attribute *attr,const char *buf,
3342                                 size_t count)
3343 {
3344         struct fb_info *info;
3345         int rotate, idx;
3346         char **last = NULL;
3347
3348         if (fbcon_has_exited)
3349                 return count;
3350
3351         acquire_console_sem();
3352         idx = con2fb_map[fg_console];
3353
3354         if (idx == -1 || registered_fb[idx] == NULL)
3355                 goto err;
3356
3357         info = registered_fb[idx];
3358         rotate = simple_strtoul(buf, last, 0);
3359         fbcon_rotate_all(info, rotate);
3360 err:
3361         release_console_sem();
3362         return count;
3363 }
3364
3365 static ssize_t show_rotate(struct device *device,
3366                            struct device_attribute *attr,char *buf)
3367 {
3368         struct fb_info *info;
3369         int rotate = 0, idx;
3370
3371         if (fbcon_has_exited)
3372                 return 0;
3373
3374         acquire_console_sem();
3375         idx = con2fb_map[fg_console];
3376
3377         if (idx == -1 || registered_fb[idx] == NULL)
3378                 goto err;
3379
3380         info = registered_fb[idx];
3381         rotate = fbcon_get_rotate(info);
3382 err:
3383         release_console_sem();
3384         return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3385 }
3386
3387 static ssize_t show_cursor_blink(struct device *device,
3388                                  struct device_attribute *attr, char *buf)
3389 {
3390         struct fb_info *info;
3391         struct fbcon_ops *ops;
3392         int idx, blink = -1;
3393
3394         if (fbcon_has_exited)
3395                 return 0;
3396
3397         acquire_console_sem();
3398         idx = con2fb_map[fg_console];
3399
3400         if (idx == -1 || registered_fb[idx] == NULL)
3401                 goto err;
3402
3403         info = registered_fb[idx];
3404         ops = info->fbcon_par;
3405
3406         if (!ops)
3407                 goto err;
3408
3409         blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0;
3410 err:
3411         release_console_sem();
3412         return snprintf(buf, PAGE_SIZE, "%d\n", blink);
3413 }
3414
3415 static ssize_t store_cursor_blink(struct device *device,
3416                                   struct device_attribute *attr,
3417                                   const char *buf, size_t count)
3418 {
3419         struct fb_info *info;
3420         int blink, idx;
3421         char **last = NULL;
3422
3423         if (fbcon_has_exited)
3424                 return count;
3425
3426         acquire_console_sem();
3427         idx = con2fb_map[fg_console];
3428
3429         if (idx == -1 || registered_fb[idx] == NULL)
3430                 goto err;
3431
3432         info = registered_fb[idx];
3433
3434         if (!info->fbcon_par)
3435                 goto err;
3436
3437         blink = simple_strtoul(buf, last, 0);
3438
3439         if (blink) {
3440                 fbcon_cursor_noblink = 0;
3441                 fbcon_add_cursor_timer(info);
3442         } else {
3443                 fbcon_cursor_noblink = 1;
3444                 fbcon_del_cursor_timer(info);
3445         }
3446
3447 err:
3448         release_console_sem();
3449         return count;
3450 }
3451
3452 static struct device_attribute device_attrs[] = {
3453         __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3454         __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3455         __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink,
3456                store_cursor_blink),
3457 };
3458
3459 static int fbcon_init_device(void)
3460 {
3461         int i, error = 0;
3462
3463         fbcon_has_sysfs = 1;
3464
3465         for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3466                 error = device_create_file(fbcon_device, &device_attrs[i]);
3467
3468                 if (error)
3469                         break;
3470         }
3471
3472         if (error) {
3473                 while (--i >= 0)
3474                         device_remove_file(fbcon_device, &device_attrs[i]);
3475
3476                 fbcon_has_sysfs = 0;
3477         }
3478
3479         return 0;
3480 }
3481
3482 static void fbcon_start(void)
3483 {
3484         if (num_registered_fb) {
3485                 int i;
3486
3487                 acquire_console_sem();
3488
3489                 for (i = 0; i < FB_MAX; i++) {
3490                         if (registered_fb[i] != NULL) {
3491                                 info_idx = i;
3492                                 break;
3493                         }
3494                 }
3495
3496                 release_console_sem();
3497                 fbcon_takeover(0);
3498         }
3499 }
3500
3501 static void fbcon_exit(void)
3502 {
3503         struct fb_info *info;
3504         int i, j, mapped;
3505
3506         if (fbcon_has_exited)
3507                 return;
3508
3509 #ifdef CONFIG_ATARI
3510         free_irq(IRQ_AUTO_4, fb_vbl_handler);
3511 #endif
3512 #ifdef CONFIG_MAC
3513         if (MACH_IS_MAC && vbl_detected)
3514                 free_irq(IRQ_MAC_VBL, fb_vbl_handler);
3515 #endif
3516
3517         kfree((void *)softback_buf);
3518         softback_buf = 0UL;
3519
3520         for (i = 0; i < FB_MAX; i++) {
3521                 mapped = 0;
3522                 info = registered_fb[i];
3523
3524                 if (info == NULL)
3525                         continue;
3526
3527                 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3528                         if (con2fb_map[j] == i)
3529                                 mapped = 1;
3530                 }
3531
3532                 if (mapped) {
3533                         if (info->fbops->fb_release)
3534                                 info->fbops->fb_release(info, 0);
3535                         module_put(info->fbops->owner);
3536
3537                         if (info->fbcon_par) {
3538                                 struct fbcon_ops *ops = info->fbcon_par;
3539
3540                                 fbcon_del_cursor_timer(info);
3541                                 kfree(ops->cursor_src);
3542                                 kfree(info->fbcon_par);
3543                                 info->fbcon_par = NULL;
3544                         }
3545
3546                         if (info->queue.func == fb_flashcursor)
3547                                 info->queue.func = NULL;
3548                 }
3549         }
3550
3551         fbcon_has_exited = 1;
3552 }
3553
3554 static int __init fb_console_init(void)
3555 {
3556         int i;
3557
3558         acquire_console_sem();
3559         fb_register_client(&fbcon_event_notifier);
3560         fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), "fbcon");
3561
3562         if (IS_ERR(fbcon_device)) {
3563                 printk(KERN_WARNING "Unable to create device "
3564                        "for fbcon; errno = %ld\n",
3565                        PTR_ERR(fbcon_device));
3566                 fbcon_device = NULL;
3567         } else
3568                 fbcon_init_device();
3569
3570         for (i = 0; i < MAX_NR_CONSOLES; i++)
3571                 con2fb_map[i] = -1;
3572
3573         release_console_sem();
3574         fbcon_start();
3575         return 0;
3576 }
3577
3578 module_init(fb_console_init);
3579
3580 #ifdef MODULE
3581
3582 static void __exit fbcon_deinit_device(void)
3583 {
3584         int i;
3585
3586         if (fbcon_has_sysfs) {
3587                 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3588                         device_remove_file(fbcon_device, &device_attrs[i]);
3589
3590                 fbcon_has_sysfs = 0;
3591         }
3592 }
3593
3594 static void __exit fb_console_exit(void)
3595 {
3596         acquire_console_sem();
3597         fb_unregister_client(&fbcon_event_notifier);
3598         fbcon_deinit_device();
3599         device_destroy(fb_class, MKDEV(0, 0));
3600         fbcon_exit();
3601         release_console_sem();
3602         unregister_con_driver(&fb_con);
3603 }
3604
3605 module_exit(fb_console_exit);
3606
3607 #endif
3608
3609 MODULE_LICENSE("GPL");