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/fbcon.h> 72 #include <linux/vt_kern.h> 73 #include <linux/selection.h> 74 #include <linux/font.h> 75 #include <linux/smp.h> 76 #include <linux/init.h> 77 #include <linux/interrupt.h> 78 #include <linux/crc32.h> /* For counting font checksums */ 79 #include <linux/uaccess.h> 80 #include <asm/fb.h> 81 #include <asm/irq.h> 82 83 #include "fbcon.h" 84 85 #ifdef FBCONDEBUG 86 # define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __func__ , ## args) 87 #else 88 # define DPRINTK(fmt, args...) 89 #endif 90 91 /* 92 * FIXME: Locking 93 * 94 * - fbcon state itself is protected by the console_lock, and the code does a 95 * pretty good job at making sure that lock is held everywhere it's needed. 96 * 97 * - access to the registered_fb array is entirely unprotected. This should use 98 * proper object lifetime handling, i.e. get/put_fb_info. This also means 99 * switching from indices to proper pointers for fb_info everywhere. 100 * 101 * - fbcon doesn't bother with fb_lock/unlock at all. This is buggy, since it 102 * means concurrent access to the same fbdev from both fbcon and userspace 103 * will blow up. To fix this all fbcon calls from fbmem.c need to be moved out 104 * of fb_lock/unlock protected sections, since otherwise we'll recurse and 105 * deadlock eventually. Aside: Due to these deadlock issues the fbdev code in 106 * fbmem.c cannot use locking asserts, and there's lots of callers which get 107 * the rules wrong, e.g. fbsysfs.c entirely missed fb_lock/unlock calls too. 108 */ 109 110 enum { 111 FBCON_LOGO_CANSHOW = -1, /* the logo can be shown */ 112 FBCON_LOGO_DRAW = -2, /* draw the logo to a console */ 113 FBCON_LOGO_DONTSHOW = -3 /* do not show the logo */ 114 }; 115 116 static struct fbcon_display fb_display[MAX_NR_CONSOLES]; 117 118 static signed char con2fb_map[MAX_NR_CONSOLES]; 119 static signed char con2fb_map_boot[MAX_NR_CONSOLES]; 120 121 static int logo_lines; 122 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO 123 enums. */ 124 static int logo_shown = FBCON_LOGO_CANSHOW; 125 /* Software scrollback */ 126 static int fbcon_softback_size = 32768; 127 static unsigned long softback_buf, softback_curr; 128 static unsigned long softback_in; 129 static unsigned long softback_top, softback_end; 130 static int softback_lines; 131 /* console mappings */ 132 static int first_fb_vc; 133 static int last_fb_vc = MAX_NR_CONSOLES - 1; 134 static int fbcon_is_default = 1; 135 static int primary_device = -1; 136 static int fbcon_has_console_bind; 137 138 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY 139 static int map_override; 140 141 static inline void fbcon_map_override(void) 142 { 143 map_override = 1; 144 } 145 #else 146 static inline void fbcon_map_override(void) 147 { 148 } 149 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY */ 150 151 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 152 static bool deferred_takeover = true; 153 #else 154 #define deferred_takeover false 155 #endif 156 157 /* font data */ 158 static char fontname[40]; 159 160 /* current fb_info */ 161 static int info_idx = -1; 162 163 /* console rotation */ 164 static int initial_rotation = -1; 165 static int fbcon_has_sysfs; 166 static int margin_color; 167 168 static const struct consw fb_con; 169 170 #define CM_SOFTBACK (8) 171 172 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row) 173 174 static int fbcon_set_origin(struct vc_data *); 175 176 static int fbcon_cursor_noblink; 177 178 #define divides(a, b) ((!(a) || (b)%(a)) ? 0 : 1) 179 180 /* 181 * Interface used by the world 182 */ 183 184 static const char *fbcon_startup(void); 185 static void fbcon_init(struct vc_data *vc, int init); 186 static void fbcon_deinit(struct vc_data *vc); 187 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height, 188 int width); 189 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos); 190 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s, 191 int count, int ypos, int xpos); 192 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only); 193 static void fbcon_cursor(struct vc_data *vc, int mode); 194 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx, 195 int height, int width); 196 static int fbcon_switch(struct vc_data *vc); 197 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch); 198 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table); 199 200 /* 201 * Internal routines 202 */ 203 static __inline__ void ywrap_up(struct vc_data *vc, int count); 204 static __inline__ void ywrap_down(struct vc_data *vc, int count); 205 static __inline__ void ypan_up(struct vc_data *vc, int count); 206 static __inline__ void ypan_down(struct vc_data *vc, int count); 207 static void fbcon_bmove_rec(struct vc_data *vc, struct fbcon_display *p, int sy, int sx, 208 int dy, int dx, int height, int width, u_int y_break); 209 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var, 210 int unit); 211 static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p, 212 int line, int count, int dy); 213 static void fbcon_modechanged(struct fb_info *info); 214 static void fbcon_set_all_vcs(struct fb_info *info); 215 static void fbcon_start(void); 216 static void fbcon_exit(void); 217 static struct device *fbcon_device; 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 fbcon_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 fbcon_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 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 = mono_col(info); 329 /* 0 or 1 */ 330 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0; 331 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col; 332 333 if (console_blanked) 334 fg = bg; 335 336 color = (is_fg) ? fg : bg; 337 break; 338 } 339 case 2: 340 /* 341 * Scale down 16-colors to 4 colors. Default 4-color palette 342 * is grayscale. However, simply dividing the values by 4 343 * will not work, as colors 1, 2 and 3 will be scaled-down 344 * to zero rendering them invisible. So empirically convert 345 * colors to a sane 4-level grayscale. 346 */ 347 switch (color) { 348 case 0: 349 color = 0; /* black */ 350 break; 351 case 1 ... 6: 352 color = 2; /* white */ 353 break; 354 case 7 ... 8: 355 color = 1; /* gray */ 356 break; 357 default: 358 color = 3; /* intense white */ 359 break; 360 } 361 break; 362 case 3: 363 /* 364 * Last 8 entries of default 16-color palette is a more intense 365 * version of the first 8 (i.e., same chrominance, different 366 * luminance). 367 */ 368 color &= 7; 369 break; 370 } 371 372 373 return color; 374 } 375 376 static void fbcon_update_softback(struct vc_data *vc) 377 { 378 int l = fbcon_softback_size / vc->vc_size_row; 379 380 if (l > 5) 381 softback_end = softback_buf + l * vc->vc_size_row; 382 else 383 /* Smaller scrollback makes no sense, and 0 would screw 384 the operation totally */ 385 softback_top = 0; 386 } 387 388 static void fb_flashcursor(struct work_struct *work) 389 { 390 struct fb_info *info = container_of(work, struct fb_info, queue); 391 struct fbcon_ops *ops = info->fbcon_par; 392 struct vc_data *vc = NULL; 393 int c; 394 int mode; 395 int ret; 396 397 /* FIXME: we should sort out the unbind locking instead */ 398 /* instead we just fail to flash the cursor if we can't get 399 * the lock instead of blocking fbcon deinit */ 400 ret = console_trylock(); 401 if (ret == 0) 402 return; 403 404 if (ops && ops->currcon != -1) 405 vc = vc_cons[ops->currcon].d; 406 407 if (!vc || !con_is_visible(vc) || 408 registered_fb[con2fb_map[vc->vc_num]] != info || 409 vc->vc_deccm != 1) { 410 console_unlock(); 411 return; 412 } 413 414 c = scr_readw((u16 *) vc->vc_pos); 415 mode = (!ops->cursor_flash || ops->cursor_state.enable) ? 416 CM_ERASE : CM_DRAW; 417 ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1), 418 get_color(vc, info, c, 0)); 419 console_unlock(); 420 } 421 422 static void cursor_timer_handler(struct timer_list *t) 423 { 424 struct fbcon_ops *ops = from_timer(ops, t, cursor_timer); 425 struct fb_info *info = ops->info; 426 427 queue_work(system_power_efficient_wq, &info->queue); 428 mod_timer(&ops->cursor_timer, jiffies + ops->cur_blink_jiffies); 429 } 430 431 static void fbcon_add_cursor_timer(struct fb_info *info) 432 { 433 struct fbcon_ops *ops = info->fbcon_par; 434 435 if ((!info->queue.func || info->queue.func == fb_flashcursor) && 436 !(ops->flags & FBCON_FLAGS_CURSOR_TIMER) && 437 !fbcon_cursor_noblink) { 438 if (!info->queue.func) 439 INIT_WORK(&info->queue, fb_flashcursor); 440 441 timer_setup(&ops->cursor_timer, cursor_timer_handler, 0); 442 mod_timer(&ops->cursor_timer, jiffies + ops->cur_blink_jiffies); 443 ops->flags |= FBCON_FLAGS_CURSOR_TIMER; 444 } 445 } 446 447 static void fbcon_del_cursor_timer(struct fb_info *info) 448 { 449 struct fbcon_ops *ops = info->fbcon_par; 450 451 if (info->queue.func == fb_flashcursor && 452 ops->flags & FBCON_FLAGS_CURSOR_TIMER) { 453 del_timer_sync(&ops->cursor_timer); 454 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER; 455 } 456 } 457 458 #ifndef MODULE 459 static int __init fb_console_setup(char *this_opt) 460 { 461 char *options; 462 int i, j; 463 464 if (!this_opt || !*this_opt) 465 return 1; 466 467 while ((options = strsep(&this_opt, ",")) != NULL) { 468 if (!strncmp(options, "font:", 5)) { 469 strlcpy(fontname, options + 5, sizeof(fontname)); 470 continue; 471 } 472 473 if (!strncmp(options, "scrollback:", 11)) { 474 options += 11; 475 if (*options) { 476 fbcon_softback_size = simple_strtoul(options, &options, 0); 477 if (*options == 'k' || *options == 'K') { 478 fbcon_softback_size *= 1024; 479 } 480 } 481 continue; 482 } 483 484 if (!strncmp(options, "map:", 4)) { 485 options += 4; 486 if (*options) { 487 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) { 488 if (!options[j]) 489 j = 0; 490 con2fb_map_boot[i] = 491 (options[j++]-'0') % FB_MAX; 492 } 493 494 fbcon_map_override(); 495 } 496 continue; 497 } 498 499 if (!strncmp(options, "vc:", 3)) { 500 options += 3; 501 if (*options) 502 first_fb_vc = simple_strtoul(options, &options, 10) - 1; 503 if (first_fb_vc < 0) 504 first_fb_vc = 0; 505 if (*options++ == '-') 506 last_fb_vc = simple_strtoul(options, &options, 10) - 1; 507 fbcon_is_default = 0; 508 continue; 509 } 510 511 if (!strncmp(options, "rotate:", 7)) { 512 options += 7; 513 if (*options) 514 initial_rotation = simple_strtoul(options, &options, 0); 515 if (initial_rotation > 3) 516 initial_rotation = 0; 517 continue; 518 } 519 520 if (!strncmp(options, "margin:", 7)) { 521 options += 7; 522 if (*options) 523 margin_color = simple_strtoul(options, &options, 0); 524 continue; 525 } 526 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 527 if (!strcmp(options, "nodefer")) { 528 deferred_takeover = false; 529 continue; 530 } 531 #endif 532 533 if (!strncmp(options, "logo-pos:", 9)) { 534 options += 9; 535 if (!strcmp(options, "center")) 536 fb_center_logo = true; 537 continue; 538 } 539 540 if (!strncmp(options, "logo-count:", 11)) { 541 options += 11; 542 if (*options) 543 fb_logo_count = simple_strtol(options, &options, 0); 544 continue; 545 } 546 } 547 return 1; 548 } 549 550 __setup("fbcon=", fb_console_setup); 551 #endif 552 553 static int search_fb_in_map(int idx) 554 { 555 int i, retval = 0; 556 557 for (i = first_fb_vc; i <= last_fb_vc; i++) { 558 if (con2fb_map[i] == idx) 559 retval = 1; 560 } 561 return retval; 562 } 563 564 static int search_for_mapped_con(void) 565 { 566 int i, retval = 0; 567 568 for (i = first_fb_vc; i <= last_fb_vc; i++) { 569 if (con2fb_map[i] != -1) 570 retval = 1; 571 } 572 return retval; 573 } 574 575 static int do_fbcon_takeover(int show_logo) 576 { 577 int err, i; 578 579 if (!num_registered_fb) 580 return -ENODEV; 581 582 if (!show_logo) 583 logo_shown = FBCON_LOGO_DONTSHOW; 584 585 for (i = first_fb_vc; i <= last_fb_vc; i++) 586 con2fb_map[i] = info_idx; 587 588 err = do_take_over_console(&fb_con, first_fb_vc, last_fb_vc, 589 fbcon_is_default); 590 591 if (err) { 592 for (i = first_fb_vc; i <= last_fb_vc; i++) 593 con2fb_map[i] = -1; 594 info_idx = -1; 595 } else { 596 fbcon_has_console_bind = 1; 597 } 598 599 return err; 600 } 601 602 #ifdef MODULE 603 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info, 604 int cols, int rows, int new_cols, int new_rows) 605 { 606 logo_shown = FBCON_LOGO_DONTSHOW; 607 } 608 #else 609 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info, 610 int cols, int rows, int new_cols, int new_rows) 611 { 612 /* Need to make room for the logo */ 613 struct fbcon_ops *ops = info->fbcon_par; 614 int cnt, erase = vc->vc_video_erase_char, step; 615 unsigned short *save = NULL, *r, *q; 616 int logo_height; 617 618 if (info->fbops->owner) { 619 logo_shown = FBCON_LOGO_DONTSHOW; 620 return; 621 } 622 623 /* 624 * remove underline attribute from erase character 625 * if black and white framebuffer. 626 */ 627 if (fb_get_color_depth(&info->var, &info->fix) == 1) 628 erase &= ~0x400; 629 logo_height = fb_prepare_logo(info, ops->rotate); 630 logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height); 631 q = (unsigned short *) (vc->vc_origin + 632 vc->vc_size_row * rows); 633 step = logo_lines * cols; 634 for (r = q - logo_lines * cols; r < q; r++) 635 if (scr_readw(r) != vc->vc_video_erase_char) 636 break; 637 if (r != q && new_rows >= rows + logo_lines) { 638 save = kmalloc(array3_size(logo_lines, new_cols, 2), 639 GFP_KERNEL); 640 if (save) { 641 int i = cols < new_cols ? cols : new_cols; 642 scr_memsetw(save, erase, array3_size(logo_lines, new_cols, 2)); 643 r = q - step; 644 for (cnt = 0; cnt < logo_lines; cnt++, r += i) 645 scr_memcpyw(save + cnt * new_cols, r, 2 * i); 646 r = q; 647 } 648 } 649 if (r == q) { 650 /* We can scroll screen down */ 651 r = q - step - cols; 652 for (cnt = rows - logo_lines; cnt > 0; cnt--) { 653 scr_memcpyw(r + step, r, vc->vc_size_row); 654 r -= cols; 655 } 656 if (!save) { 657 int lines; 658 if (vc->state.y + logo_lines >= rows) 659 lines = rows - vc->state.y - 1; 660 else 661 lines = logo_lines; 662 vc->state.y += lines; 663 vc->vc_pos += lines * vc->vc_size_row; 664 } 665 } 666 scr_memsetw((unsigned short *) vc->vc_origin, 667 erase, 668 vc->vc_size_row * logo_lines); 669 670 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) { 671 fbcon_clear_margins(vc, 0); 672 update_screen(vc); 673 } 674 675 if (save) { 676 q = (unsigned short *) (vc->vc_origin + 677 vc->vc_size_row * 678 rows); 679 scr_memcpyw(q, save, array3_size(logo_lines, new_cols, 2)); 680 vc->state.y += logo_lines; 681 vc->vc_pos += logo_lines * vc->vc_size_row; 682 kfree(save); 683 } 684 685 if (logo_shown == FBCON_LOGO_DONTSHOW) 686 return; 687 688 if (logo_lines > vc->vc_bottom) { 689 logo_shown = FBCON_LOGO_CANSHOW; 690 printk(KERN_INFO 691 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n"); 692 } else { 693 logo_shown = FBCON_LOGO_DRAW; 694 vc->vc_top = logo_lines; 695 } 696 } 697 #endif /* MODULE */ 698 699 #ifdef CONFIG_FB_TILEBLITTING 700 static void set_blitting_type(struct vc_data *vc, struct fb_info *info) 701 { 702 struct fbcon_ops *ops = info->fbcon_par; 703 704 ops->p = &fb_display[vc->vc_num]; 705 706 if ((info->flags & FBINFO_MISC_TILEBLITTING)) 707 fbcon_set_tileops(vc, info); 708 else { 709 fbcon_set_rotation(info); 710 fbcon_set_bitops(ops); 711 } 712 } 713 714 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount) 715 { 716 int err = 0; 717 718 if (info->flags & FBINFO_MISC_TILEBLITTING && 719 info->tileops->fb_get_tilemax(info) < charcount) 720 err = 1; 721 722 return err; 723 } 724 #else 725 static void set_blitting_type(struct vc_data *vc, struct fb_info *info) 726 { 727 struct fbcon_ops *ops = info->fbcon_par; 728 729 info->flags &= ~FBINFO_MISC_TILEBLITTING; 730 ops->p = &fb_display[vc->vc_num]; 731 fbcon_set_rotation(info); 732 fbcon_set_bitops(ops); 733 } 734 735 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount) 736 { 737 return 0; 738 } 739 740 #endif /* CONFIG_MISC_TILEBLITTING */ 741 742 743 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info, 744 int unit, int oldidx) 745 { 746 struct fbcon_ops *ops = NULL; 747 int err = 0; 748 749 if (!try_module_get(info->fbops->owner)) 750 err = -ENODEV; 751 752 if (!err && info->fbops->fb_open && 753 info->fbops->fb_open(info, 0)) 754 err = -ENODEV; 755 756 if (!err) { 757 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL); 758 if (!ops) 759 err = -ENOMEM; 760 } 761 762 if (!err) { 763 ops->cur_blink_jiffies = HZ / 5; 764 ops->info = info; 765 info->fbcon_par = ops; 766 767 if (vc) 768 set_blitting_type(vc, info); 769 } 770 771 if (err) { 772 con2fb_map[unit] = oldidx; 773 module_put(info->fbops->owner); 774 } 775 776 return err; 777 } 778 779 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo, 780 struct fb_info *newinfo, int unit, 781 int oldidx, int found) 782 { 783 struct fbcon_ops *ops = oldinfo->fbcon_par; 784 int err = 0, ret; 785 786 if (oldinfo->fbops->fb_release && 787 oldinfo->fbops->fb_release(oldinfo, 0)) { 788 con2fb_map[unit] = oldidx; 789 if (!found && newinfo->fbops->fb_release) 790 newinfo->fbops->fb_release(newinfo, 0); 791 if (!found) 792 module_put(newinfo->fbops->owner); 793 err = -ENODEV; 794 } 795 796 if (!err) { 797 fbcon_del_cursor_timer(oldinfo); 798 kfree(ops->cursor_state.mask); 799 kfree(ops->cursor_data); 800 kfree(ops->cursor_src); 801 kfree(ops->fontbuffer); 802 kfree(oldinfo->fbcon_par); 803 oldinfo->fbcon_par = NULL; 804 module_put(oldinfo->fbops->owner); 805 /* 806 If oldinfo and newinfo are driving the same hardware, 807 the fb_release() method of oldinfo may attempt to 808 restore the hardware state. This will leave the 809 newinfo in an undefined state. Thus, a call to 810 fb_set_par() may be needed for the newinfo. 811 */ 812 if (newinfo && newinfo->fbops->fb_set_par) { 813 ret = newinfo->fbops->fb_set_par(newinfo); 814 815 if (ret) 816 printk(KERN_ERR "con2fb_release_oldinfo: " 817 "detected unhandled fb_set_par error, " 818 "error code %d\n", ret); 819 } 820 } 821 822 return err; 823 } 824 825 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info, 826 int unit, int show_logo) 827 { 828 struct fbcon_ops *ops = info->fbcon_par; 829 int ret; 830 831 ops->currcon = fg_console; 832 833 if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT)) { 834 ret = info->fbops->fb_set_par(info); 835 836 if (ret) 837 printk(KERN_ERR "con2fb_init_display: detected " 838 "unhandled fb_set_par error, " 839 "error code %d\n", ret); 840 } 841 842 ops->flags |= FBCON_FLAGS_INIT; 843 ops->graphics = 0; 844 fbcon_set_disp(info, &info->var, unit); 845 846 if (show_logo) { 847 struct vc_data *fg_vc = vc_cons[fg_console].d; 848 struct fb_info *fg_info = 849 registered_fb[con2fb_map[fg_console]]; 850 851 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols, 852 fg_vc->vc_rows, fg_vc->vc_cols, 853 fg_vc->vc_rows); 854 } 855 856 update_screen(vc_cons[fg_console].d); 857 } 858 859 /** 860 * set_con2fb_map - map console to frame buffer device 861 * @unit: virtual console number to map 862 * @newidx: frame buffer index to map virtual console to 863 * @user: user request 864 * 865 * Maps a virtual console @unit to a frame buffer device 866 * @newidx. 867 * 868 * This should be called with the console lock held. 869 */ 870 static int set_con2fb_map(int unit, int newidx, int user) 871 { 872 struct vc_data *vc = vc_cons[unit].d; 873 int oldidx = con2fb_map[unit]; 874 struct fb_info *info = registered_fb[newidx]; 875 struct fb_info *oldinfo = NULL; 876 int found, err = 0; 877 878 WARN_CONSOLE_UNLOCKED(); 879 880 if (oldidx == newidx) 881 return 0; 882 883 if (!info) 884 return -EINVAL; 885 886 if (!search_for_mapped_con() || !con_is_bound(&fb_con)) { 887 info_idx = newidx; 888 return do_fbcon_takeover(0); 889 } 890 891 if (oldidx != -1) 892 oldinfo = registered_fb[oldidx]; 893 894 found = search_fb_in_map(newidx); 895 896 con2fb_map[unit] = newidx; 897 if (!err && !found) 898 err = con2fb_acquire_newinfo(vc, info, unit, oldidx); 899 900 /* 901 * If old fb is not mapped to any of the consoles, 902 * fbcon should release it. 903 */ 904 if (!err && oldinfo && !search_fb_in_map(oldidx)) 905 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx, 906 found); 907 908 if (!err) { 909 int show_logo = (fg_console == 0 && !user && 910 logo_shown != FBCON_LOGO_DONTSHOW); 911 912 if (!found) 913 fbcon_add_cursor_timer(info); 914 con2fb_map_boot[unit] = newidx; 915 con2fb_init_display(vc, info, unit, show_logo); 916 } 917 918 if (!search_fb_in_map(info_idx)) 919 info_idx = newidx; 920 921 return err; 922 } 923 924 /* 925 * Low Level Operations 926 */ 927 /* NOTE: fbcon cannot be __init: it may be called from do_take_over_console later */ 928 static int var_to_display(struct fbcon_display *disp, 929 struct fb_var_screeninfo *var, 930 struct fb_info *info) 931 { 932 disp->xres_virtual = var->xres_virtual; 933 disp->yres_virtual = var->yres_virtual; 934 disp->bits_per_pixel = var->bits_per_pixel; 935 disp->grayscale = var->grayscale; 936 disp->nonstd = var->nonstd; 937 disp->accel_flags = var->accel_flags; 938 disp->height = var->height; 939 disp->width = var->width; 940 disp->red = var->red; 941 disp->green = var->green; 942 disp->blue = var->blue; 943 disp->transp = var->transp; 944 disp->rotate = var->rotate; 945 disp->mode = fb_match_mode(var, &info->modelist); 946 if (disp->mode == NULL) 947 /* This should not happen */ 948 return -EINVAL; 949 return 0; 950 } 951 952 static void display_to_var(struct fb_var_screeninfo *var, 953 struct fbcon_display *disp) 954 { 955 fb_videomode_to_var(var, disp->mode); 956 var->xres_virtual = disp->xres_virtual; 957 var->yres_virtual = disp->yres_virtual; 958 var->bits_per_pixel = disp->bits_per_pixel; 959 var->grayscale = disp->grayscale; 960 var->nonstd = disp->nonstd; 961 var->accel_flags = disp->accel_flags; 962 var->height = disp->height; 963 var->width = disp->width; 964 var->red = disp->red; 965 var->green = disp->green; 966 var->blue = disp->blue; 967 var->transp = disp->transp; 968 var->rotate = disp->rotate; 969 } 970 971 static const char *fbcon_startup(void) 972 { 973 const char *display_desc = "frame buffer device"; 974 struct fbcon_display *p = &fb_display[fg_console]; 975 struct vc_data *vc = vc_cons[fg_console].d; 976 const struct font_desc *font = NULL; 977 struct module *owner; 978 struct fb_info *info = NULL; 979 struct fbcon_ops *ops; 980 int rows, cols; 981 982 /* 983 * If num_registered_fb is zero, this is a call for the dummy part. 984 * The frame buffer devices weren't initialized yet. 985 */ 986 if (!num_registered_fb || info_idx == -1) 987 return display_desc; 988 /* 989 * Instead of blindly using registered_fb[0], we use info_idx, set by 990 * fb_console_init(); 991 */ 992 info = registered_fb[info_idx]; 993 if (!info) 994 return NULL; 995 996 owner = info->fbops->owner; 997 if (!try_module_get(owner)) 998 return NULL; 999 if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) { 1000 module_put(owner); 1001 return NULL; 1002 } 1003 1004 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL); 1005 if (!ops) { 1006 module_put(owner); 1007 return NULL; 1008 } 1009 1010 ops->currcon = -1; 1011 ops->graphics = 1; 1012 ops->cur_rotate = -1; 1013 ops->cur_blink_jiffies = HZ / 5; 1014 ops->info = info; 1015 info->fbcon_par = ops; 1016 1017 p->con_rotate = initial_rotation; 1018 if (p->con_rotate == -1) 1019 p->con_rotate = info->fbcon_rotate_hint; 1020 if (p->con_rotate == -1) 1021 p->con_rotate = FB_ROTATE_UR; 1022 1023 set_blitting_type(vc, info); 1024 1025 if (info->fix.type != FB_TYPE_TEXT) { 1026 if (fbcon_softback_size) { 1027 if (!softback_buf) { 1028 softback_buf = 1029 (unsigned long) 1030 kvmalloc(fbcon_softback_size, 1031 GFP_KERNEL); 1032 if (!softback_buf) { 1033 fbcon_softback_size = 0; 1034 softback_top = 0; 1035 } 1036 } 1037 } else { 1038 if (softback_buf) { 1039 kvfree((void *) softback_buf); 1040 softback_buf = 0; 1041 softback_top = 0; 1042 } 1043 } 1044 if (softback_buf) 1045 softback_in = softback_top = softback_curr = 1046 softback_buf; 1047 softback_lines = 0; 1048 } 1049 1050 /* Setup default font */ 1051 if (!p->fontdata && !vc->vc_font.data) { 1052 if (!fontname[0] || !(font = find_font(fontname))) 1053 font = get_default_font(info->var.xres, 1054 info->var.yres, 1055 info->pixmap.blit_x, 1056 info->pixmap.blit_y); 1057 vc->vc_font.width = font->width; 1058 vc->vc_font.height = font->height; 1059 vc->vc_font.data = (void *)(p->fontdata = font->data); 1060 vc->vc_font.charcount = 256; /* FIXME Need to support more fonts */ 1061 } else { 1062 p->fontdata = vc->vc_font.data; 1063 } 1064 1065 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 1066 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 1067 cols /= vc->vc_font.width; 1068 rows /= vc->vc_font.height; 1069 vc_resize(vc, cols, rows); 1070 1071 DPRINTK("mode: %s\n", info->fix.id); 1072 DPRINTK("visual: %d\n", info->fix.visual); 1073 DPRINTK("res: %dx%d-%d\n", info->var.xres, 1074 info->var.yres, 1075 info->var.bits_per_pixel); 1076 1077 fbcon_add_cursor_timer(info); 1078 return display_desc; 1079 } 1080 1081 static void fbcon_init(struct vc_data *vc, int init) 1082 { 1083 struct fb_info *info; 1084 struct fbcon_ops *ops; 1085 struct vc_data **default_mode = vc->vc_display_fg; 1086 struct vc_data *svc = *default_mode; 1087 struct fbcon_display *t, *p = &fb_display[vc->vc_num]; 1088 int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256; 1089 int cap, ret; 1090 1091 if (WARN_ON(info_idx == -1)) 1092 return; 1093 1094 if (con2fb_map[vc->vc_num] == -1) 1095 con2fb_map[vc->vc_num] = info_idx; 1096 1097 info = registered_fb[con2fb_map[vc->vc_num]]; 1098 cap = info->flags; 1099 1100 if (logo_shown < 0 && console_loglevel <= CONSOLE_LOGLEVEL_QUIET) 1101 logo_shown = FBCON_LOGO_DONTSHOW; 1102 1103 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW || 1104 (info->fix.type == FB_TYPE_TEXT)) 1105 logo = 0; 1106 1107 if (var_to_display(p, &info->var, info)) 1108 return; 1109 1110 if (!info->fbcon_par) 1111 con2fb_acquire_newinfo(vc, info, vc->vc_num, -1); 1112 1113 /* If we are not the first console on this 1114 fb, copy the font from that console */ 1115 t = &fb_display[fg_console]; 1116 if (!p->fontdata) { 1117 if (t->fontdata) { 1118 struct vc_data *fvc = vc_cons[fg_console].d; 1119 1120 vc->vc_font.data = (void *)(p->fontdata = 1121 fvc->vc_font.data); 1122 vc->vc_font.width = fvc->vc_font.width; 1123 vc->vc_font.height = fvc->vc_font.height; 1124 p->userfont = t->userfont; 1125 1126 if (p->userfont) 1127 REFCOUNT(p->fontdata)++; 1128 } else { 1129 const struct font_desc *font = NULL; 1130 1131 if (!fontname[0] || !(font = find_font(fontname))) 1132 font = get_default_font(info->var.xres, 1133 info->var.yres, 1134 info->pixmap.blit_x, 1135 info->pixmap.blit_y); 1136 vc->vc_font.width = font->width; 1137 vc->vc_font.height = font->height; 1138 vc->vc_font.data = (void *)(p->fontdata = font->data); 1139 vc->vc_font.charcount = 256; /* FIXME Need to 1140 support more fonts */ 1141 } 1142 } 1143 1144 if (p->userfont) 1145 charcnt = FNTCHARCNT(p->fontdata); 1146 1147 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1); 1148 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 1149 if (charcnt == 256) { 1150 vc->vc_hi_font_mask = 0; 1151 } else { 1152 vc->vc_hi_font_mask = 0x100; 1153 if (vc->vc_can_do_color) 1154 vc->vc_complement_mask <<= 1; 1155 } 1156 1157 if (!*svc->vc_uni_pagedir_loc) 1158 con_set_default_unimap(svc); 1159 if (!*vc->vc_uni_pagedir_loc) 1160 con_copy_unimap(vc, svc); 1161 1162 ops = info->fbcon_par; 1163 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms); 1164 1165 p->con_rotate = initial_rotation; 1166 if (p->con_rotate == -1) 1167 p->con_rotate = info->fbcon_rotate_hint; 1168 if (p->con_rotate == -1) 1169 p->con_rotate = FB_ROTATE_UR; 1170 1171 set_blitting_type(vc, info); 1172 1173 cols = vc->vc_cols; 1174 rows = vc->vc_rows; 1175 new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 1176 new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 1177 new_cols /= vc->vc_font.width; 1178 new_rows /= vc->vc_font.height; 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 ret = info->fbops->fb_set_par(info); 1191 1192 if (ret) 1193 printk(KERN_ERR "fbcon_init: detected " 1194 "unhandled fb_set_par error, " 1195 "error code %d\n", ret); 1196 } 1197 1198 ops->flags |= FBCON_FLAGS_INIT; 1199 } 1200 1201 ops->graphics = 0; 1202 1203 if ((cap & FBINFO_HWACCEL_COPYAREA) && 1204 !(cap & FBINFO_HWACCEL_DISABLED)) 1205 p->scrollmode = SCROLL_MOVE; 1206 else /* default to something safe */ 1207 p->scrollmode = SCROLL_REDRAW; 1208 1209 /* 1210 * ++guenther: console.c:vc_allocate() relies on initializing 1211 * vc_{cols,rows}, but we must not set those if we are only 1212 * resizing the console. 1213 */ 1214 if (init) { 1215 vc->vc_cols = new_cols; 1216 vc->vc_rows = new_rows; 1217 } else 1218 vc_resize(vc, new_cols, new_rows); 1219 1220 if (logo) 1221 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows); 1222 1223 if (vc == svc && softback_buf) 1224 fbcon_update_softback(vc); 1225 1226 if (ops->rotate_font && ops->rotate_font(info, vc)) { 1227 ops->rotate = FB_ROTATE_UR; 1228 set_blitting_type(vc, info); 1229 } 1230 1231 ops->p = &fb_display[fg_console]; 1232 } 1233 1234 static void fbcon_free_font(struct fbcon_display *p, bool freefont) 1235 { 1236 if (freefont && p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0)) 1237 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int)); 1238 p->fontdata = NULL; 1239 p->userfont = 0; 1240 } 1241 1242 static void set_vc_hi_font(struct vc_data *vc, bool set); 1243 1244 static void fbcon_deinit(struct vc_data *vc) 1245 { 1246 struct fbcon_display *p = &fb_display[vc->vc_num]; 1247 struct fb_info *info; 1248 struct fbcon_ops *ops; 1249 int idx; 1250 bool free_font = true; 1251 1252 idx = con2fb_map[vc->vc_num]; 1253 1254 if (idx == -1) 1255 goto finished; 1256 1257 info = registered_fb[idx]; 1258 1259 if (!info) 1260 goto finished; 1261 1262 if (info->flags & FBINFO_MISC_FIRMWARE) 1263 free_font = false; 1264 ops = info->fbcon_par; 1265 1266 if (!ops) 1267 goto finished; 1268 1269 if (con_is_visible(vc)) 1270 fbcon_del_cursor_timer(info); 1271 1272 ops->flags &= ~FBCON_FLAGS_INIT; 1273 finished: 1274 1275 fbcon_free_font(p, free_font); 1276 if (free_font) 1277 vc->vc_font.data = NULL; 1278 1279 if (vc->vc_hi_font_mask && vc->vc_screenbuf) 1280 set_vc_hi_font(vc, false); 1281 1282 if (!con_is_bound(&fb_con)) 1283 fbcon_exit(); 1284 1285 if (vc->vc_num == logo_shown) 1286 logo_shown = FBCON_LOGO_CANSHOW; 1287 1288 return; 1289 } 1290 1291 /* ====================================================================== */ 1292 1293 /* fbcon_XXX routines - interface used by the world 1294 * 1295 * This system is now divided into two levels because of complications 1296 * caused by hardware scrolling. Top level functions: 1297 * 1298 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins() 1299 * 1300 * handles y values in range [0, scr_height-1] that correspond to real 1301 * screen positions. y_wrap shift means that first line of bitmap may be 1302 * anywhere on this display. These functions convert lineoffsets to 1303 * bitmap offsets and deal with the wrap-around case by splitting blits. 1304 * 1305 * fbcon_bmove_physical_8() -- These functions fast implementations 1306 * fbcon_clear_physical_8() -- of original fbcon_XXX fns. 1307 * fbcon_putc_physical_8() -- (font width != 8) may be added later 1308 * 1309 * WARNING: 1310 * 1311 * At the moment fbcon_putc() cannot blit across vertical wrap boundary 1312 * Implies should only really hardware scroll in rows. Only reason for 1313 * restriction is simplicity & efficiency at the moment. 1314 */ 1315 1316 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height, 1317 int width) 1318 { 1319 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1320 struct fbcon_ops *ops = info->fbcon_par; 1321 1322 struct fbcon_display *p = &fb_display[vc->vc_num]; 1323 u_int y_break; 1324 1325 if (fbcon_is_inactive(vc, info)) 1326 return; 1327 1328 if (!height || !width) 1329 return; 1330 1331 if (sy < vc->vc_top && vc->vc_top == logo_lines) { 1332 vc->vc_top = 0; 1333 /* 1334 * If the font dimensions are not an integral of the display 1335 * dimensions then the ops->clear below won't end up clearing 1336 * the margins. Call clear_margins here in case the logo 1337 * bitmap stretched into the margin area. 1338 */ 1339 fbcon_clear_margins(vc, 0); 1340 } 1341 1342 /* Split blits that cross physical y_wrap boundary */ 1343 1344 y_break = p->vrows - p->yscroll; 1345 if (sy < y_break && sy + height - 1 >= y_break) { 1346 u_int b = y_break - sy; 1347 ops->clear(vc, info, real_y(p, sy), sx, b, width); 1348 ops->clear(vc, info, real_y(p, sy + b), sx, height - b, 1349 width); 1350 } else 1351 ops->clear(vc, info, real_y(p, sy), sx, height, width); 1352 } 1353 1354 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s, 1355 int count, int ypos, int xpos) 1356 { 1357 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1358 struct fbcon_display *p = &fb_display[vc->vc_num]; 1359 struct fbcon_ops *ops = info->fbcon_par; 1360 1361 if (!fbcon_is_inactive(vc, info)) 1362 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos, 1363 get_color(vc, info, scr_readw(s), 1), 1364 get_color(vc, info, scr_readw(s), 0)); 1365 } 1366 1367 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos) 1368 { 1369 unsigned short chr; 1370 1371 scr_writew(c, &chr); 1372 fbcon_putcs(vc, &chr, 1, ypos, xpos); 1373 } 1374 1375 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only) 1376 { 1377 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1378 struct fbcon_ops *ops = info->fbcon_par; 1379 1380 if (!fbcon_is_inactive(vc, info)) 1381 ops->clear_margins(vc, info, margin_color, bottom_only); 1382 } 1383 1384 static void fbcon_cursor(struct vc_data *vc, int mode) 1385 { 1386 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1387 struct fbcon_ops *ops = info->fbcon_par; 1388 int y; 1389 int c = scr_readw((u16 *) vc->vc_pos); 1390 1391 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms); 1392 1393 if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1) 1394 return; 1395 1396 if (vc->vc_cursor_type & CUR_SW) 1397 fbcon_del_cursor_timer(info); 1398 else 1399 fbcon_add_cursor_timer(info); 1400 1401 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1; 1402 if (mode & CM_SOFTBACK) { 1403 mode &= ~CM_SOFTBACK; 1404 y = softback_lines; 1405 } else { 1406 if (softback_lines) 1407 fbcon_set_origin(vc); 1408 y = 0; 1409 } 1410 1411 ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1), 1412 get_color(vc, info, c, 0)); 1413 } 1414 1415 static int scrollback_phys_max = 0; 1416 static int scrollback_max = 0; 1417 static int scrollback_current = 0; 1418 1419 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var, 1420 int unit) 1421 { 1422 struct fbcon_display *p, *t; 1423 struct vc_data **default_mode, *vc; 1424 struct vc_data *svc; 1425 struct fbcon_ops *ops = info->fbcon_par; 1426 int rows, cols, charcnt = 256; 1427 1428 p = &fb_display[unit]; 1429 1430 if (var_to_display(p, var, info)) 1431 return; 1432 1433 vc = vc_cons[unit].d; 1434 1435 if (!vc) 1436 return; 1437 1438 default_mode = vc->vc_display_fg; 1439 svc = *default_mode; 1440 t = &fb_display[svc->vc_num]; 1441 1442 if (!vc->vc_font.data) { 1443 vc->vc_font.data = (void *)(p->fontdata = t->fontdata); 1444 vc->vc_font.width = (*default_mode)->vc_font.width; 1445 vc->vc_font.height = (*default_mode)->vc_font.height; 1446 p->userfont = t->userfont; 1447 if (p->userfont) 1448 REFCOUNT(p->fontdata)++; 1449 } 1450 if (p->userfont) 1451 charcnt = FNTCHARCNT(p->fontdata); 1452 1453 var->activate = FB_ACTIVATE_NOW; 1454 info->var.activate = var->activate; 1455 var->yoffset = info->var.yoffset; 1456 var->xoffset = info->var.xoffset; 1457 fb_set_var(info, var); 1458 ops->var = info->var; 1459 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1); 1460 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 1461 if (charcnt == 256) { 1462 vc->vc_hi_font_mask = 0; 1463 } else { 1464 vc->vc_hi_font_mask = 0x100; 1465 if (vc->vc_can_do_color) 1466 vc->vc_complement_mask <<= 1; 1467 } 1468 1469 if (!*svc->vc_uni_pagedir_loc) 1470 con_set_default_unimap(svc); 1471 if (!*vc->vc_uni_pagedir_loc) 1472 con_copy_unimap(vc, svc); 1473 1474 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 1475 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 1476 cols /= vc->vc_font.width; 1477 rows /= vc->vc_font.height; 1478 vc_resize(vc, cols, rows); 1479 1480 if (con_is_visible(vc)) { 1481 update_screen(vc); 1482 if (softback_buf) 1483 fbcon_update_softback(vc); 1484 } 1485 } 1486 1487 static __inline__ void ywrap_up(struct vc_data *vc, int count) 1488 { 1489 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1490 struct fbcon_ops *ops = info->fbcon_par; 1491 struct fbcon_display *p = &fb_display[vc->vc_num]; 1492 1493 p->yscroll += count; 1494 if (p->yscroll >= p->vrows) /* Deal with wrap */ 1495 p->yscroll -= p->vrows; 1496 ops->var.xoffset = 0; 1497 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1498 ops->var.vmode |= FB_VMODE_YWRAP; 1499 ops->update_start(info); 1500 scrollback_max += count; 1501 if (scrollback_max > scrollback_phys_max) 1502 scrollback_max = scrollback_phys_max; 1503 scrollback_current = 0; 1504 } 1505 1506 static __inline__ void ywrap_down(struct vc_data *vc, int count) 1507 { 1508 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1509 struct fbcon_ops *ops = info->fbcon_par; 1510 struct fbcon_display *p = &fb_display[vc->vc_num]; 1511 1512 p->yscroll -= count; 1513 if (p->yscroll < 0) /* Deal with wrap */ 1514 p->yscroll += p->vrows; 1515 ops->var.xoffset = 0; 1516 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1517 ops->var.vmode |= FB_VMODE_YWRAP; 1518 ops->update_start(info); 1519 scrollback_max -= count; 1520 if (scrollback_max < 0) 1521 scrollback_max = 0; 1522 scrollback_current = 0; 1523 } 1524 1525 static __inline__ void ypan_up(struct vc_data *vc, int count) 1526 { 1527 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1528 struct fbcon_display *p = &fb_display[vc->vc_num]; 1529 struct fbcon_ops *ops = info->fbcon_par; 1530 1531 p->yscroll += count; 1532 if (p->yscroll > p->vrows - vc->vc_rows) { 1533 ops->bmove(vc, info, p->vrows - vc->vc_rows, 1534 0, 0, 0, vc->vc_rows, vc->vc_cols); 1535 p->yscroll -= p->vrows - vc->vc_rows; 1536 } 1537 1538 ops->var.xoffset = 0; 1539 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1540 ops->var.vmode &= ~FB_VMODE_YWRAP; 1541 ops->update_start(info); 1542 fbcon_clear_margins(vc, 1); 1543 scrollback_max += count; 1544 if (scrollback_max > scrollback_phys_max) 1545 scrollback_max = scrollback_phys_max; 1546 scrollback_current = 0; 1547 } 1548 1549 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count) 1550 { 1551 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1552 struct fbcon_ops *ops = info->fbcon_par; 1553 struct fbcon_display *p = &fb_display[vc->vc_num]; 1554 1555 p->yscroll += count; 1556 1557 if (p->yscroll > p->vrows - vc->vc_rows) { 1558 p->yscroll -= p->vrows - vc->vc_rows; 1559 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t); 1560 } 1561 1562 ops->var.xoffset = 0; 1563 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1564 ops->var.vmode &= ~FB_VMODE_YWRAP; 1565 ops->update_start(info); 1566 fbcon_clear_margins(vc, 1); 1567 scrollback_max += count; 1568 if (scrollback_max > scrollback_phys_max) 1569 scrollback_max = scrollback_phys_max; 1570 scrollback_current = 0; 1571 } 1572 1573 static __inline__ void ypan_down(struct vc_data *vc, int count) 1574 { 1575 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1576 struct fbcon_display *p = &fb_display[vc->vc_num]; 1577 struct fbcon_ops *ops = info->fbcon_par; 1578 1579 p->yscroll -= count; 1580 if (p->yscroll < 0) { 1581 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows, 1582 0, vc->vc_rows, vc->vc_cols); 1583 p->yscroll += p->vrows - vc->vc_rows; 1584 } 1585 1586 ops->var.xoffset = 0; 1587 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1588 ops->var.vmode &= ~FB_VMODE_YWRAP; 1589 ops->update_start(info); 1590 fbcon_clear_margins(vc, 1); 1591 scrollback_max -= count; 1592 if (scrollback_max < 0) 1593 scrollback_max = 0; 1594 scrollback_current = 0; 1595 } 1596 1597 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count) 1598 { 1599 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1600 struct fbcon_ops *ops = info->fbcon_par; 1601 struct fbcon_display *p = &fb_display[vc->vc_num]; 1602 1603 p->yscroll -= count; 1604 1605 if (p->yscroll < 0) { 1606 p->yscroll += p->vrows - vc->vc_rows; 1607 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count); 1608 } 1609 1610 ops->var.xoffset = 0; 1611 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1612 ops->var.vmode &= ~FB_VMODE_YWRAP; 1613 ops->update_start(info); 1614 fbcon_clear_margins(vc, 1); 1615 scrollback_max -= count; 1616 if (scrollback_max < 0) 1617 scrollback_max = 0; 1618 scrollback_current = 0; 1619 } 1620 1621 static void fbcon_redraw_softback(struct vc_data *vc, struct fbcon_display *p, 1622 long delta) 1623 { 1624 int count = vc->vc_rows; 1625 unsigned short *d, *s; 1626 unsigned long n; 1627 int line = 0; 1628 1629 d = (u16 *) softback_curr; 1630 if (d == (u16 *) softback_in) 1631 d = (u16 *) vc->vc_origin; 1632 n = softback_curr + delta * vc->vc_size_row; 1633 softback_lines -= delta; 1634 if (delta < 0) { 1635 if (softback_curr < softback_top && n < softback_buf) { 1636 n += softback_end - softback_buf; 1637 if (n < softback_top) { 1638 softback_lines -= 1639 (softback_top - n) / vc->vc_size_row; 1640 n = softback_top; 1641 } 1642 } else if (softback_curr >= softback_top 1643 && n < softback_top) { 1644 softback_lines -= 1645 (softback_top - n) / vc->vc_size_row; 1646 n = softback_top; 1647 } 1648 } else { 1649 if (softback_curr > softback_in && n >= softback_end) { 1650 n += softback_buf - softback_end; 1651 if (n > softback_in) { 1652 n = softback_in; 1653 softback_lines = 0; 1654 } 1655 } else if (softback_curr <= softback_in && n > softback_in) { 1656 n = softback_in; 1657 softback_lines = 0; 1658 } 1659 } 1660 if (n == softback_curr) 1661 return; 1662 softback_curr = n; 1663 s = (u16 *) softback_curr; 1664 if (s == (u16 *) softback_in) 1665 s = (u16 *) vc->vc_origin; 1666 while (count--) { 1667 unsigned short *start; 1668 unsigned short *le; 1669 unsigned short c; 1670 int x = 0; 1671 unsigned short attr = 1; 1672 1673 start = s; 1674 le = advance_row(s, 1); 1675 do { 1676 c = scr_readw(s); 1677 if (attr != (c & 0xff00)) { 1678 attr = c & 0xff00; 1679 if (s > start) { 1680 fbcon_putcs(vc, start, s - start, 1681 line, x); 1682 x += s - start; 1683 start = s; 1684 } 1685 } 1686 if (c == scr_readw(d)) { 1687 if (s > start) { 1688 fbcon_putcs(vc, start, s - start, 1689 line, x); 1690 x += s - start + 1; 1691 start = s + 1; 1692 } else { 1693 x++; 1694 start++; 1695 } 1696 } 1697 s++; 1698 d++; 1699 } while (s < le); 1700 if (s > start) 1701 fbcon_putcs(vc, start, s - start, line, x); 1702 line++; 1703 if (d == (u16 *) softback_end) 1704 d = (u16 *) softback_buf; 1705 if (d == (u16 *) softback_in) 1706 d = (u16 *) vc->vc_origin; 1707 if (s == (u16 *) softback_end) 1708 s = (u16 *) softback_buf; 1709 if (s == (u16 *) softback_in) 1710 s = (u16 *) vc->vc_origin; 1711 } 1712 } 1713 1714 static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p, 1715 int line, int count, int dy) 1716 { 1717 unsigned short *s = (unsigned short *) 1718 (vc->vc_origin + vc->vc_size_row * line); 1719 1720 while (count--) { 1721 unsigned short *start = s; 1722 unsigned short *le = advance_row(s, 1); 1723 unsigned short c; 1724 int x = 0; 1725 unsigned short attr = 1; 1726 1727 do { 1728 c = scr_readw(s); 1729 if (attr != (c & 0xff00)) { 1730 attr = c & 0xff00; 1731 if (s > start) { 1732 fbcon_putcs(vc, start, s - start, 1733 dy, x); 1734 x += s - start; 1735 start = s; 1736 } 1737 } 1738 console_conditional_schedule(); 1739 s++; 1740 } while (s < le); 1741 if (s > start) 1742 fbcon_putcs(vc, start, s - start, dy, x); 1743 console_conditional_schedule(); 1744 dy++; 1745 } 1746 } 1747 1748 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info, 1749 struct fbcon_display *p, int line, int count, int ycount) 1750 { 1751 int offset = ycount * vc->vc_cols; 1752 unsigned short *d = (unsigned short *) 1753 (vc->vc_origin + vc->vc_size_row * line); 1754 unsigned short *s = d + offset; 1755 struct fbcon_ops *ops = info->fbcon_par; 1756 1757 while (count--) { 1758 unsigned short *start = s; 1759 unsigned short *le = advance_row(s, 1); 1760 unsigned short c; 1761 int x = 0; 1762 1763 do { 1764 c = scr_readw(s); 1765 1766 if (c == scr_readw(d)) { 1767 if (s > start) { 1768 ops->bmove(vc, info, line + ycount, x, 1769 line, x, 1, s-start); 1770 x += s - start + 1; 1771 start = s + 1; 1772 } else { 1773 x++; 1774 start++; 1775 } 1776 } 1777 1778 scr_writew(c, d); 1779 console_conditional_schedule(); 1780 s++; 1781 d++; 1782 } while (s < le); 1783 if (s > start) 1784 ops->bmove(vc, info, line + ycount, x, line, x, 1, 1785 s-start); 1786 console_conditional_schedule(); 1787 if (ycount > 0) 1788 line++; 1789 else { 1790 line--; 1791 /* NOTE: We subtract two lines from these pointers */ 1792 s -= vc->vc_size_row; 1793 d -= vc->vc_size_row; 1794 } 1795 } 1796 } 1797 1798 static void fbcon_redraw(struct vc_data *vc, struct fbcon_display *p, 1799 int line, int count, int offset) 1800 { 1801 unsigned short *d = (unsigned short *) 1802 (vc->vc_origin + vc->vc_size_row * line); 1803 unsigned short *s = d + offset; 1804 1805 while (count--) { 1806 unsigned short *start = s; 1807 unsigned short *le = advance_row(s, 1); 1808 unsigned short c; 1809 int x = 0; 1810 unsigned short attr = 1; 1811 1812 do { 1813 c = scr_readw(s); 1814 if (attr != (c & 0xff00)) { 1815 attr = c & 0xff00; 1816 if (s > start) { 1817 fbcon_putcs(vc, start, s - start, 1818 line, x); 1819 x += s - start; 1820 start = s; 1821 } 1822 } 1823 if (c == scr_readw(d)) { 1824 if (s > start) { 1825 fbcon_putcs(vc, start, s - start, 1826 line, x); 1827 x += s - start + 1; 1828 start = s + 1; 1829 } else { 1830 x++; 1831 start++; 1832 } 1833 } 1834 scr_writew(c, d); 1835 console_conditional_schedule(); 1836 s++; 1837 d++; 1838 } while (s < le); 1839 if (s > start) 1840 fbcon_putcs(vc, start, s - start, line, x); 1841 console_conditional_schedule(); 1842 if (offset > 0) 1843 line++; 1844 else { 1845 line--; 1846 /* NOTE: We subtract two lines from these pointers */ 1847 s -= vc->vc_size_row; 1848 d -= vc->vc_size_row; 1849 } 1850 } 1851 } 1852 1853 static inline void fbcon_softback_note(struct vc_data *vc, int t, 1854 int count) 1855 { 1856 unsigned short *p; 1857 1858 if (vc->vc_num != fg_console) 1859 return; 1860 p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row); 1861 1862 while (count) { 1863 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row); 1864 count--; 1865 p = advance_row(p, 1); 1866 softback_in += vc->vc_size_row; 1867 if (softback_in == softback_end) 1868 softback_in = softback_buf; 1869 if (softback_in == softback_top) { 1870 softback_top += vc->vc_size_row; 1871 if (softback_top == softback_end) 1872 softback_top = softback_buf; 1873 } 1874 } 1875 softback_curr = softback_in; 1876 } 1877 1878 static bool fbcon_scroll(struct vc_data *vc, unsigned int t, unsigned int b, 1879 enum con_scroll dir, unsigned int count) 1880 { 1881 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1882 struct fbcon_display *p = &fb_display[vc->vc_num]; 1883 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK; 1884 1885 if (fbcon_is_inactive(vc, info)) 1886 return true; 1887 1888 fbcon_cursor(vc, CM_ERASE); 1889 1890 /* 1891 * ++Geert: Only use ywrap/ypan if the console is in text mode 1892 * ++Andrew: Only use ypan on hardware text mode when scrolling the 1893 * whole screen (prevents flicker). 1894 */ 1895 1896 switch (dir) { 1897 case SM_UP: 1898 if (count > vc->vc_rows) /* Maximum realistic size */ 1899 count = vc->vc_rows; 1900 if (softback_top) 1901 fbcon_softback_note(vc, t, count); 1902 if (logo_shown >= 0) 1903 goto redraw_up; 1904 switch (p->scrollmode) { 1905 case SCROLL_MOVE: 1906 fbcon_redraw_blit(vc, info, p, t, b - t - count, 1907 count); 1908 fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1909 scr_memsetw((unsigned short *) (vc->vc_origin + 1910 vc->vc_size_row * 1911 (b - count)), 1912 vc->vc_video_erase_char, 1913 vc->vc_size_row * count); 1914 return true; 1915 break; 1916 1917 case SCROLL_WRAP_MOVE: 1918 if (b - t - count > 3 * vc->vc_rows >> 2) { 1919 if (t > 0) 1920 fbcon_bmove(vc, 0, 0, count, 0, t, 1921 vc->vc_cols); 1922 ywrap_up(vc, count); 1923 if (vc->vc_rows - b > 0) 1924 fbcon_bmove(vc, b - count, 0, b, 0, 1925 vc->vc_rows - b, 1926 vc->vc_cols); 1927 } else if (info->flags & FBINFO_READS_FAST) 1928 fbcon_bmove(vc, t + count, 0, t, 0, 1929 b - t - count, vc->vc_cols); 1930 else 1931 goto redraw_up; 1932 fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1933 break; 1934 1935 case SCROLL_PAN_REDRAW: 1936 if ((p->yscroll + count <= 1937 2 * (p->vrows - vc->vc_rows)) 1938 && ((!scroll_partial && (b - t == vc->vc_rows)) 1939 || (scroll_partial 1940 && (b - t - count > 1941 3 * vc->vc_rows >> 2)))) { 1942 if (t > 0) 1943 fbcon_redraw_move(vc, p, 0, t, count); 1944 ypan_up_redraw(vc, t, count); 1945 if (vc->vc_rows - b > 0) 1946 fbcon_redraw_move(vc, p, b, 1947 vc->vc_rows - b, b); 1948 } else 1949 fbcon_redraw_move(vc, p, t + count, b - t - count, t); 1950 fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1951 break; 1952 1953 case SCROLL_PAN_MOVE: 1954 if ((p->yscroll + count <= 1955 2 * (p->vrows - vc->vc_rows)) 1956 && ((!scroll_partial && (b - t == vc->vc_rows)) 1957 || (scroll_partial 1958 && (b - t - count > 1959 3 * vc->vc_rows >> 2)))) { 1960 if (t > 0) 1961 fbcon_bmove(vc, 0, 0, count, 0, t, 1962 vc->vc_cols); 1963 ypan_up(vc, count); 1964 if (vc->vc_rows - b > 0) 1965 fbcon_bmove(vc, b - count, 0, b, 0, 1966 vc->vc_rows - b, 1967 vc->vc_cols); 1968 } else if (info->flags & FBINFO_READS_FAST) 1969 fbcon_bmove(vc, t + count, 0, t, 0, 1970 b - t - count, vc->vc_cols); 1971 else 1972 goto redraw_up; 1973 fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1974 break; 1975 1976 case SCROLL_REDRAW: 1977 redraw_up: 1978 fbcon_redraw(vc, p, t, b - t - count, 1979 count * vc->vc_cols); 1980 fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1981 scr_memsetw((unsigned short *) (vc->vc_origin + 1982 vc->vc_size_row * 1983 (b - count)), 1984 vc->vc_video_erase_char, 1985 vc->vc_size_row * count); 1986 return true; 1987 } 1988 break; 1989 1990 case SM_DOWN: 1991 if (count > vc->vc_rows) /* Maximum realistic size */ 1992 count = vc->vc_rows; 1993 if (logo_shown >= 0) 1994 goto redraw_down; 1995 switch (p->scrollmode) { 1996 case SCROLL_MOVE: 1997 fbcon_redraw_blit(vc, info, p, b - 1, b - t - count, 1998 -count); 1999 fbcon_clear(vc, t, 0, count, vc->vc_cols); 2000 scr_memsetw((unsigned short *) (vc->vc_origin + 2001 vc->vc_size_row * 2002 t), 2003 vc->vc_video_erase_char, 2004 vc->vc_size_row * count); 2005 return true; 2006 break; 2007 2008 case SCROLL_WRAP_MOVE: 2009 if (b - t - count > 3 * vc->vc_rows >> 2) { 2010 if (vc->vc_rows - b > 0) 2011 fbcon_bmove(vc, b, 0, b - count, 0, 2012 vc->vc_rows - b, 2013 vc->vc_cols); 2014 ywrap_down(vc, count); 2015 if (t > 0) 2016 fbcon_bmove(vc, count, 0, 0, 0, t, 2017 vc->vc_cols); 2018 } else if (info->flags & FBINFO_READS_FAST) 2019 fbcon_bmove(vc, t, 0, t + count, 0, 2020 b - t - count, vc->vc_cols); 2021 else 2022 goto redraw_down; 2023 fbcon_clear(vc, t, 0, count, vc->vc_cols); 2024 break; 2025 2026 case SCROLL_PAN_MOVE: 2027 if ((count - p->yscroll <= p->vrows - vc->vc_rows) 2028 && ((!scroll_partial && (b - t == vc->vc_rows)) 2029 || (scroll_partial 2030 && (b - t - count > 2031 3 * vc->vc_rows >> 2)))) { 2032 if (vc->vc_rows - b > 0) 2033 fbcon_bmove(vc, b, 0, b - count, 0, 2034 vc->vc_rows - b, 2035 vc->vc_cols); 2036 ypan_down(vc, count); 2037 if (t > 0) 2038 fbcon_bmove(vc, count, 0, 0, 0, t, 2039 vc->vc_cols); 2040 } else if (info->flags & FBINFO_READS_FAST) 2041 fbcon_bmove(vc, t, 0, t + count, 0, 2042 b - t - count, vc->vc_cols); 2043 else 2044 goto redraw_down; 2045 fbcon_clear(vc, t, 0, count, vc->vc_cols); 2046 break; 2047 2048 case SCROLL_PAN_REDRAW: 2049 if ((count - p->yscroll <= p->vrows - vc->vc_rows) 2050 && ((!scroll_partial && (b - t == vc->vc_rows)) 2051 || (scroll_partial 2052 && (b - t - count > 2053 3 * vc->vc_rows >> 2)))) { 2054 if (vc->vc_rows - b > 0) 2055 fbcon_redraw_move(vc, p, b, vc->vc_rows - b, 2056 b - count); 2057 ypan_down_redraw(vc, t, count); 2058 if (t > 0) 2059 fbcon_redraw_move(vc, p, count, t, 0); 2060 } else 2061 fbcon_redraw_move(vc, p, t, b - t - count, t + count); 2062 fbcon_clear(vc, t, 0, count, vc->vc_cols); 2063 break; 2064 2065 case SCROLL_REDRAW: 2066 redraw_down: 2067 fbcon_redraw(vc, p, b - 1, b - t - count, 2068 -count * vc->vc_cols); 2069 fbcon_clear(vc, t, 0, count, vc->vc_cols); 2070 scr_memsetw((unsigned short *) (vc->vc_origin + 2071 vc->vc_size_row * 2072 t), 2073 vc->vc_video_erase_char, 2074 vc->vc_size_row * count); 2075 return true; 2076 } 2077 } 2078 return false; 2079 } 2080 2081 2082 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx, 2083 int height, int width) 2084 { 2085 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 2086 struct fbcon_display *p = &fb_display[vc->vc_num]; 2087 2088 if (fbcon_is_inactive(vc, info)) 2089 return; 2090 2091 if (!width || !height) 2092 return; 2093 2094 /* Split blits that cross physical y_wrap case. 2095 * Pathological case involves 4 blits, better to use recursive 2096 * code rather than unrolled case 2097 * 2098 * Recursive invocations don't need to erase the cursor over and 2099 * over again, so we use fbcon_bmove_rec() 2100 */ 2101 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width, 2102 p->vrows - p->yscroll); 2103 } 2104 2105 static void fbcon_bmove_rec(struct vc_data *vc, struct fbcon_display *p, int sy, int sx, 2106 int dy, int dx, int height, int width, u_int y_break) 2107 { 2108 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 2109 struct fbcon_ops *ops = info->fbcon_par; 2110 u_int b; 2111 2112 if (sy < y_break && sy + height > y_break) { 2113 b = y_break - sy; 2114 if (dy < sy) { /* Avoid trashing self */ 2115 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 2116 y_break); 2117 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 2118 height - b, width, y_break); 2119 } else { 2120 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 2121 height - b, width, y_break); 2122 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 2123 y_break); 2124 } 2125 return; 2126 } 2127 2128 if (dy < y_break && dy + height > y_break) { 2129 b = y_break - dy; 2130 if (dy < sy) { /* Avoid trashing self */ 2131 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 2132 y_break); 2133 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 2134 height - b, width, y_break); 2135 } else { 2136 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 2137 height - b, width, y_break); 2138 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 2139 y_break); 2140 } 2141 return; 2142 } 2143 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx, 2144 height, width); 2145 } 2146 2147 static void updatescrollmode(struct fbcon_display *p, 2148 struct fb_info *info, 2149 struct vc_data *vc) 2150 { 2151 struct fbcon_ops *ops = info->fbcon_par; 2152 int fh = vc->vc_font.height; 2153 int cap = info->flags; 2154 u16 t = 0; 2155 int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep, 2156 info->fix.xpanstep); 2157 int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t); 2158 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 2159 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual, 2160 info->var.xres_virtual); 2161 int good_pan = (cap & FBINFO_HWACCEL_YPAN) && 2162 divides(ypan, vc->vc_font.height) && vyres > yres; 2163 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) && 2164 divides(ywrap, vc->vc_font.height) && 2165 divides(vc->vc_font.height, vyres) && 2166 divides(vc->vc_font.height, yres); 2167 int reading_fast = cap & FBINFO_READS_FAST; 2168 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) && 2169 !(cap & FBINFO_HWACCEL_DISABLED); 2170 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) && 2171 !(cap & FBINFO_HWACCEL_DISABLED); 2172 2173 p->vrows = vyres/fh; 2174 if (yres > (fh * (vc->vc_rows + 1))) 2175 p->vrows -= (yres - (fh * vc->vc_rows)) / fh; 2176 if ((yres % fh) && (vyres % fh < yres % fh)) 2177 p->vrows--; 2178 2179 if (good_wrap || good_pan) { 2180 if (reading_fast || fast_copyarea) 2181 p->scrollmode = good_wrap ? 2182 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE; 2183 else 2184 p->scrollmode = good_wrap ? SCROLL_REDRAW : 2185 SCROLL_PAN_REDRAW; 2186 } else { 2187 if (reading_fast || (fast_copyarea && !fast_imageblit)) 2188 p->scrollmode = SCROLL_MOVE; 2189 else 2190 p->scrollmode = SCROLL_REDRAW; 2191 } 2192 } 2193 2194 #define PITCH(w) (((w) + 7) >> 3) 2195 #define CALC_FONTSZ(h, p, c) ((h) * (p) * (c)) /* size = height * pitch * charcount */ 2196 2197 static int fbcon_resize(struct vc_data *vc, unsigned int width, 2198 unsigned int height, unsigned int user) 2199 { 2200 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 2201 struct fbcon_ops *ops = info->fbcon_par; 2202 struct fbcon_display *p = &fb_display[vc->vc_num]; 2203 struct fb_var_screeninfo var = info->var; 2204 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh; 2205 2206 if (ops->p && ops->p->userfont && FNTSIZE(vc->vc_font.data)) { 2207 int size; 2208 int pitch = PITCH(vc->vc_font.width); 2209 2210 /* 2211 * If user font, ensure that a possible change to user font 2212 * height or width will not allow a font data out-of-bounds access. 2213 * NOTE: must use original charcount in calculation as font 2214 * charcount can change and cannot be used to determine the 2215 * font data allocated size. 2216 */ 2217 if (pitch <= 0) 2218 return -EINVAL; 2219 size = CALC_FONTSZ(vc->vc_font.height, pitch, FNTCHARCNT(vc->vc_font.data)); 2220 if (size > FNTSIZE(vc->vc_font.data)) 2221 return -EINVAL; 2222 } 2223 2224 virt_w = FBCON_SWAP(ops->rotate, width, height); 2225 virt_h = FBCON_SWAP(ops->rotate, height, width); 2226 virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width, 2227 vc->vc_font.height); 2228 virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height, 2229 vc->vc_font.width); 2230 var.xres = virt_w * virt_fw; 2231 var.yres = virt_h * virt_fh; 2232 x_diff = info->var.xres - var.xres; 2233 y_diff = info->var.yres - var.yres; 2234 if (x_diff < 0 || x_diff > virt_fw || 2235 y_diff < 0 || y_diff > virt_fh) { 2236 const struct fb_videomode *mode; 2237 2238 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres); 2239 mode = fb_find_best_mode(&var, &info->modelist); 2240 if (mode == NULL) 2241 return -EINVAL; 2242 display_to_var(&var, p); 2243 fb_videomode_to_var(&var, mode); 2244 2245 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh) 2246 return -EINVAL; 2247 2248 DPRINTK("resize now %ix%i\n", var.xres, var.yres); 2249 if (con_is_visible(vc)) { 2250 var.activate = FB_ACTIVATE_NOW | 2251 FB_ACTIVATE_FORCE; 2252 fb_set_var(info, &var); 2253 } 2254 var_to_display(p, &info->var, info); 2255 ops->var = info->var; 2256 } 2257 updatescrollmode(p, info, vc); 2258 return 0; 2259 } 2260 2261 static int fbcon_switch(struct vc_data *vc) 2262 { 2263 struct fb_info *info, *old_info = NULL; 2264 struct fbcon_ops *ops; 2265 struct fbcon_display *p = &fb_display[vc->vc_num]; 2266 struct fb_var_screeninfo var; 2267 int i, ret, prev_console, charcnt = 256; 2268 2269 info = registered_fb[con2fb_map[vc->vc_num]]; 2270 ops = info->fbcon_par; 2271 2272 if (softback_top) { 2273 if (softback_lines) 2274 fbcon_set_origin(vc); 2275 softback_top = softback_curr = softback_in = softback_buf; 2276 softback_lines = 0; 2277 fbcon_update_softback(vc); 2278 } 2279 2280 if (logo_shown >= 0) { 2281 struct vc_data *conp2 = vc_cons[logo_shown].d; 2282 2283 if (conp2->vc_top == logo_lines 2284 && conp2->vc_bottom == conp2->vc_rows) 2285 conp2->vc_top = 0; 2286 logo_shown = FBCON_LOGO_CANSHOW; 2287 } 2288 2289 prev_console = ops->currcon; 2290 if (prev_console != -1) 2291 old_info = registered_fb[con2fb_map[prev_console]]; 2292 /* 2293 * FIXME: If we have multiple fbdev's loaded, we need to 2294 * update all info->currcon. Perhaps, we can place this 2295 * in a centralized structure, but this might break some 2296 * drivers. 2297 * 2298 * info->currcon = vc->vc_num; 2299 */ 2300 for_each_registered_fb(i) { 2301 if (registered_fb[i]->fbcon_par) { 2302 struct fbcon_ops *o = registered_fb[i]->fbcon_par; 2303 2304 o->currcon = vc->vc_num; 2305 } 2306 } 2307 memset(&var, 0, sizeof(struct fb_var_screeninfo)); 2308 display_to_var(&var, p); 2309 var.activate = FB_ACTIVATE_NOW; 2310 2311 /* 2312 * make sure we don't unnecessarily trip the memcmp() 2313 * in fb_set_var() 2314 */ 2315 info->var.activate = var.activate; 2316 var.vmode |= info->var.vmode & ~FB_VMODE_MASK; 2317 fb_set_var(info, &var); 2318 ops->var = info->var; 2319 2320 if (old_info != NULL && (old_info != info || 2321 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) { 2322 if (info->fbops->fb_set_par) { 2323 ret = info->fbops->fb_set_par(info); 2324 2325 if (ret) 2326 printk(KERN_ERR "fbcon_switch: detected " 2327 "unhandled fb_set_par error, " 2328 "error code %d\n", ret); 2329 } 2330 2331 if (old_info != info) 2332 fbcon_del_cursor_timer(old_info); 2333 } 2334 2335 if (fbcon_is_inactive(vc, info) || 2336 ops->blank_state != FB_BLANK_UNBLANK) 2337 fbcon_del_cursor_timer(info); 2338 else 2339 fbcon_add_cursor_timer(info); 2340 2341 set_blitting_type(vc, info); 2342 ops->cursor_reset = 1; 2343 2344 if (ops->rotate_font && ops->rotate_font(info, vc)) { 2345 ops->rotate = FB_ROTATE_UR; 2346 set_blitting_type(vc, info); 2347 } 2348 2349 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1); 2350 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 2351 2352 if (p->userfont) 2353 charcnt = FNTCHARCNT(vc->vc_font.data); 2354 2355 if (charcnt > 256) 2356 vc->vc_complement_mask <<= 1; 2357 2358 updatescrollmode(p, info, vc); 2359 2360 switch (p->scrollmode) { 2361 case SCROLL_WRAP_MOVE: 2362 scrollback_phys_max = p->vrows - vc->vc_rows; 2363 break; 2364 case SCROLL_PAN_MOVE: 2365 case SCROLL_PAN_REDRAW: 2366 scrollback_phys_max = p->vrows - 2 * vc->vc_rows; 2367 if (scrollback_phys_max < 0) 2368 scrollback_phys_max = 0; 2369 break; 2370 default: 2371 scrollback_phys_max = 0; 2372 break; 2373 } 2374 2375 scrollback_max = 0; 2376 scrollback_current = 0; 2377 2378 if (!fbcon_is_inactive(vc, info)) { 2379 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0; 2380 ops->update_start(info); 2381 } 2382 2383 fbcon_set_palette(vc, color_table); 2384 fbcon_clear_margins(vc, 0); 2385 2386 if (logo_shown == FBCON_LOGO_DRAW) { 2387 2388 logo_shown = fg_console; 2389 /* This is protected above by initmem_freed */ 2390 fb_show_logo(info, ops->rotate); 2391 update_region(vc, 2392 vc->vc_origin + vc->vc_size_row * vc->vc_top, 2393 vc->vc_size_row * (vc->vc_bottom - 2394 vc->vc_top) / 2); 2395 return 0; 2396 } 2397 return 1; 2398 } 2399 2400 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info, 2401 int blank) 2402 { 2403 if (blank) { 2404 unsigned short charmask = vc->vc_hi_font_mask ? 2405 0x1ff : 0xff; 2406 unsigned short oldc; 2407 2408 oldc = vc->vc_video_erase_char; 2409 vc->vc_video_erase_char &= charmask; 2410 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols); 2411 vc->vc_video_erase_char = oldc; 2412 } 2413 } 2414 2415 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch) 2416 { 2417 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 2418 struct fbcon_ops *ops = info->fbcon_par; 2419 2420 if (mode_switch) { 2421 struct fb_var_screeninfo var = info->var; 2422 2423 ops->graphics = 1; 2424 2425 if (!blank) { 2426 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE | 2427 FB_ACTIVATE_KD_TEXT; 2428 fb_set_var(info, &var); 2429 ops->graphics = 0; 2430 ops->var = info->var; 2431 } 2432 } 2433 2434 if (!fbcon_is_inactive(vc, info)) { 2435 if (ops->blank_state != blank) { 2436 ops->blank_state = blank; 2437 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW); 2438 ops->cursor_flash = (!blank); 2439 2440 if (fb_blank(info, blank)) 2441 fbcon_generic_blank(vc, info, blank); 2442 } 2443 2444 if (!blank) 2445 update_screen(vc); 2446 } 2447 2448 if (mode_switch || fbcon_is_inactive(vc, info) || 2449 ops->blank_state != FB_BLANK_UNBLANK) 2450 fbcon_del_cursor_timer(info); 2451 else 2452 fbcon_add_cursor_timer(info); 2453 2454 return 0; 2455 } 2456 2457 static int fbcon_debug_enter(struct vc_data *vc) 2458 { 2459 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 2460 struct fbcon_ops *ops = info->fbcon_par; 2461 2462 ops->save_graphics = ops->graphics; 2463 ops->graphics = 0; 2464 if (info->fbops->fb_debug_enter) 2465 info->fbops->fb_debug_enter(info); 2466 fbcon_set_palette(vc, color_table); 2467 return 0; 2468 } 2469 2470 static int fbcon_debug_leave(struct vc_data *vc) 2471 { 2472 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 2473 struct fbcon_ops *ops = info->fbcon_par; 2474 2475 ops->graphics = ops->save_graphics; 2476 if (info->fbops->fb_debug_leave) 2477 info->fbops->fb_debug_leave(info); 2478 return 0; 2479 } 2480 2481 static int fbcon_get_font(struct vc_data *vc, struct console_font *font) 2482 { 2483 u8 *fontdata = vc->vc_font.data; 2484 u8 *data = font->data; 2485 int i, j; 2486 2487 font->width = vc->vc_font.width; 2488 font->height = vc->vc_font.height; 2489 font->charcount = vc->vc_hi_font_mask ? 512 : 256; 2490 if (!font->data) 2491 return 0; 2492 2493 if (font->width <= 8) { 2494 j = vc->vc_font.height; 2495 for (i = 0; i < font->charcount; i++) { 2496 memcpy(data, fontdata, j); 2497 memset(data + j, 0, 32 - j); 2498 data += 32; 2499 fontdata += j; 2500 } 2501 } else if (font->width <= 16) { 2502 j = vc->vc_font.height * 2; 2503 for (i = 0; i < font->charcount; i++) { 2504 memcpy(data, fontdata, j); 2505 memset(data + j, 0, 64 - j); 2506 data += 64; 2507 fontdata += j; 2508 } 2509 } else if (font->width <= 24) { 2510 for (i = 0; i < font->charcount; i++) { 2511 for (j = 0; j < vc->vc_font.height; j++) { 2512 *data++ = fontdata[0]; 2513 *data++ = fontdata[1]; 2514 *data++ = fontdata[2]; 2515 fontdata += sizeof(u32); 2516 } 2517 memset(data, 0, 3 * (32 - j)); 2518 data += 3 * (32 - j); 2519 } 2520 } else { 2521 j = vc->vc_font.height * 4; 2522 for (i = 0; i < font->charcount; i++) { 2523 memcpy(data, fontdata, j); 2524 memset(data + j, 0, 128 - j); 2525 data += 128; 2526 fontdata += j; 2527 } 2528 } 2529 return 0; 2530 } 2531 2532 /* set/clear vc_hi_font_mask and update vc attrs accordingly */ 2533 static void set_vc_hi_font(struct vc_data *vc, bool set) 2534 { 2535 if (!set) { 2536 vc->vc_hi_font_mask = 0; 2537 if (vc->vc_can_do_color) { 2538 vc->vc_complement_mask >>= 1; 2539 vc->vc_s_complement_mask >>= 1; 2540 } 2541 2542 /* ++Edmund: reorder the attribute bits */ 2543 if (vc->vc_can_do_color) { 2544 unsigned short *cp = 2545 (unsigned short *) vc->vc_origin; 2546 int count = vc->vc_screenbuf_size / 2; 2547 unsigned short c; 2548 for (; count > 0; count--, cp++) { 2549 c = scr_readw(cp); 2550 scr_writew(((c & 0xfe00) >> 1) | 2551 (c & 0xff), cp); 2552 } 2553 c = vc->vc_video_erase_char; 2554 vc->vc_video_erase_char = 2555 ((c & 0xfe00) >> 1) | (c & 0xff); 2556 vc->vc_attr >>= 1; 2557 } 2558 } else { 2559 vc->vc_hi_font_mask = 0x100; 2560 if (vc->vc_can_do_color) { 2561 vc->vc_complement_mask <<= 1; 2562 vc->vc_s_complement_mask <<= 1; 2563 } 2564 2565 /* ++Edmund: reorder the attribute bits */ 2566 { 2567 unsigned short *cp = 2568 (unsigned short *) vc->vc_origin; 2569 int count = vc->vc_screenbuf_size / 2; 2570 unsigned short c; 2571 for (; count > 0; count--, cp++) { 2572 unsigned short newc; 2573 c = scr_readw(cp); 2574 if (vc->vc_can_do_color) 2575 newc = 2576 ((c & 0xff00) << 1) | (c & 2577 0xff); 2578 else 2579 newc = c & ~0x100; 2580 scr_writew(newc, cp); 2581 } 2582 c = vc->vc_video_erase_char; 2583 if (vc->vc_can_do_color) { 2584 vc->vc_video_erase_char = 2585 ((c & 0xff00) << 1) | (c & 0xff); 2586 vc->vc_attr <<= 1; 2587 } else 2588 vc->vc_video_erase_char = c & ~0x100; 2589 } 2590 } 2591 } 2592 2593 static int fbcon_do_set_font(struct vc_data *vc, int w, int h, 2594 const u8 * data, int userfont) 2595 { 2596 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 2597 struct fbcon_ops *ops = info->fbcon_par; 2598 struct fbcon_display *p = &fb_display[vc->vc_num]; 2599 int resize; 2600 int cnt; 2601 char *old_data = NULL; 2602 2603 if (con_is_visible(vc) && softback_lines) 2604 fbcon_set_origin(vc); 2605 2606 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height); 2607 if (p->userfont) 2608 old_data = vc->vc_font.data; 2609 if (userfont) 2610 cnt = FNTCHARCNT(data); 2611 else 2612 cnt = 256; 2613 vc->vc_font.data = (void *)(p->fontdata = data); 2614 if ((p->userfont = userfont)) 2615 REFCOUNT(data)++; 2616 vc->vc_font.width = w; 2617 vc->vc_font.height = h; 2618 if (vc->vc_hi_font_mask && cnt == 256) 2619 set_vc_hi_font(vc, false); 2620 else if (!vc->vc_hi_font_mask && cnt == 512) 2621 set_vc_hi_font(vc, true); 2622 2623 if (resize) { 2624 int cols, rows; 2625 2626 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 2627 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 2628 cols /= w; 2629 rows /= h; 2630 vc_resize(vc, cols, rows); 2631 if (con_is_visible(vc) && softback_buf) 2632 fbcon_update_softback(vc); 2633 } else if (con_is_visible(vc) 2634 && vc->vc_mode == KD_TEXT) { 2635 fbcon_clear_margins(vc, 0); 2636 update_screen(vc); 2637 } 2638 2639 if (old_data && (--REFCOUNT(old_data) == 0)) 2640 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int)); 2641 return 0; 2642 } 2643 2644 static int fbcon_copy_font(struct vc_data *vc, int con) 2645 { 2646 struct fbcon_display *od = &fb_display[con]; 2647 struct console_font *f = &vc->vc_font; 2648 2649 if (od->fontdata == f->data) 2650 return 0; /* already the same font... */ 2651 return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont); 2652 } 2653 2654 /* 2655 * User asked to set font; we are guaranteed that 2656 * a) width and height are in range 1..32 2657 * b) charcount does not exceed 512 2658 * but lets not assume that, since someone might someday want to use larger 2659 * fonts. And charcount of 512 is small for unicode support. 2660 * 2661 * However, user space gives the font in 32 rows , regardless of 2662 * actual font height. So a new API is needed if support for larger fonts 2663 * is ever implemented. 2664 */ 2665 2666 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, 2667 unsigned int flags) 2668 { 2669 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 2670 unsigned charcount = font->charcount; 2671 int w = font->width; 2672 int h = font->height; 2673 int size; 2674 int i, csum; 2675 u8 *new_data, *data = font->data; 2676 int pitch = PITCH(font->width); 2677 2678 /* Is there a reason why fbconsole couldn't handle any charcount >256? 2679 * If not this check should be changed to charcount < 256 */ 2680 if (charcount != 256 && charcount != 512) 2681 return -EINVAL; 2682 2683 /* Make sure drawing engine can handle the font */ 2684 if (!(info->pixmap.blit_x & (1 << (font->width - 1))) || 2685 !(info->pixmap.blit_y & (1 << (font->height - 1)))) 2686 return -EINVAL; 2687 2688 /* Make sure driver can handle the font length */ 2689 if (fbcon_invalid_charcount(info, charcount)) 2690 return -EINVAL; 2691 2692 size = CALC_FONTSZ(h, pitch, charcount); 2693 2694 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER); 2695 2696 if (!new_data) 2697 return -ENOMEM; 2698 2699 new_data += FONT_EXTRA_WORDS * sizeof(int); 2700 FNTSIZE(new_data) = size; 2701 FNTCHARCNT(new_data) = charcount; 2702 REFCOUNT(new_data) = 0; /* usage counter */ 2703 for (i=0; i< charcount; i++) { 2704 memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch); 2705 } 2706 2707 /* Since linux has a nice crc32 function use it for counting font 2708 * checksums. */ 2709 csum = crc32(0, new_data, size); 2710 2711 FNTSUM(new_data) = csum; 2712 /* Check if the same font is on some other console already */ 2713 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2714 struct vc_data *tmp = vc_cons[i].d; 2715 2716 if (fb_display[i].userfont && 2717 fb_display[i].fontdata && 2718 FNTSUM(fb_display[i].fontdata) == csum && 2719 FNTSIZE(fb_display[i].fontdata) == size && 2720 tmp->vc_font.width == w && 2721 !memcmp(fb_display[i].fontdata, new_data, size)) { 2722 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int)); 2723 new_data = (u8 *)fb_display[i].fontdata; 2724 break; 2725 } 2726 } 2727 return fbcon_do_set_font(vc, font->width, font->height, new_data, 1); 2728 } 2729 2730 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name) 2731 { 2732 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 2733 const struct font_desc *f; 2734 2735 if (!name) 2736 f = get_default_font(info->var.xres, info->var.yres, 2737 info->pixmap.blit_x, info->pixmap.blit_y); 2738 else if (!(f = find_font(name))) 2739 return -ENOENT; 2740 2741 font->width = f->width; 2742 font->height = f->height; 2743 return fbcon_do_set_font(vc, f->width, f->height, f->data, 0); 2744 } 2745 2746 static u16 palette_red[16]; 2747 static u16 palette_green[16]; 2748 static u16 palette_blue[16]; 2749 2750 static struct fb_cmap palette_cmap = { 2751 0, 16, palette_red, palette_green, palette_blue, NULL 2752 }; 2753 2754 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table) 2755 { 2756 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 2757 int i, j, k, depth; 2758 u8 val; 2759 2760 if (fbcon_is_inactive(vc, info)) 2761 return; 2762 2763 if (!con_is_visible(vc)) 2764 return; 2765 2766 depth = fb_get_color_depth(&info->var, &info->fix); 2767 if (depth > 3) { 2768 for (i = j = 0; i < 16; i++) { 2769 k = table[i]; 2770 val = vc->vc_palette[j++]; 2771 palette_red[k] = (val << 8) | val; 2772 val = vc->vc_palette[j++]; 2773 palette_green[k] = (val << 8) | val; 2774 val = vc->vc_palette[j++]; 2775 palette_blue[k] = (val << 8) | val; 2776 } 2777 palette_cmap.len = 16; 2778 palette_cmap.start = 0; 2779 /* 2780 * If framebuffer is capable of less than 16 colors, 2781 * use default palette of fbcon. 2782 */ 2783 } else 2784 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap); 2785 2786 fb_set_cmap(&palette_cmap, info); 2787 } 2788 2789 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset) 2790 { 2791 unsigned long p; 2792 int line; 2793 2794 if (vc->vc_num != fg_console || !softback_lines) 2795 return (u16 *) (vc->vc_origin + offset); 2796 line = offset / vc->vc_size_row; 2797 if (line >= softback_lines) 2798 return (u16 *) (vc->vc_origin + offset - 2799 softback_lines * vc->vc_size_row); 2800 p = softback_curr + offset; 2801 if (p >= softback_end) 2802 p += softback_buf - softback_end; 2803 return (u16 *) p; 2804 } 2805 2806 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos, 2807 int *px, int *py) 2808 { 2809 unsigned long ret; 2810 int x, y; 2811 2812 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) { 2813 unsigned long offset = (pos - vc->vc_origin) / 2; 2814 2815 x = offset % vc->vc_cols; 2816 y = offset / vc->vc_cols; 2817 if (vc->vc_num == fg_console) 2818 y += softback_lines; 2819 ret = pos + (vc->vc_cols - x) * 2; 2820 } else if (vc->vc_num == fg_console && softback_lines) { 2821 unsigned long offset = pos - softback_curr; 2822 2823 if (pos < softback_curr) 2824 offset += softback_end - softback_buf; 2825 offset /= 2; 2826 x = offset % vc->vc_cols; 2827 y = offset / vc->vc_cols; 2828 ret = pos + (vc->vc_cols - x) * 2; 2829 if (ret == softback_end) 2830 ret = softback_buf; 2831 if (ret == softback_in) 2832 ret = vc->vc_origin; 2833 } else { 2834 /* Should not happen */ 2835 x = y = 0; 2836 ret = vc->vc_origin; 2837 } 2838 if (px) 2839 *px = x; 2840 if (py) 2841 *py = y; 2842 return ret; 2843 } 2844 2845 /* As we might be inside of softback, we may work with non-contiguous buffer, 2846 that's why we have to use a separate routine. */ 2847 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt) 2848 { 2849 while (cnt--) { 2850 u16 a = scr_readw(p); 2851 if (!vc->vc_can_do_color) 2852 a ^= 0x0800; 2853 else if (vc->vc_hi_font_mask == 0x100) 2854 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | 2855 (((a) & 0x0e00) << 4); 2856 else 2857 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | 2858 (((a) & 0x0700) << 4); 2859 scr_writew(a, p++); 2860 if (p == (u16 *) softback_end) 2861 p = (u16 *) softback_buf; 2862 if (p == (u16 *) softback_in) 2863 p = (u16 *) vc->vc_origin; 2864 } 2865 } 2866 2867 static void fbcon_scrolldelta(struct vc_data *vc, int lines) 2868 { 2869 struct fb_info *info = registered_fb[con2fb_map[fg_console]]; 2870 struct fbcon_ops *ops = info->fbcon_par; 2871 struct fbcon_display *disp = &fb_display[fg_console]; 2872 int offset, limit, scrollback_old; 2873 2874 if (softback_top) { 2875 if (vc->vc_num != fg_console) 2876 return; 2877 if (vc->vc_mode != KD_TEXT || !lines) 2878 return; 2879 if (logo_shown >= 0) { 2880 struct vc_data *conp2 = vc_cons[logo_shown].d; 2881 2882 if (conp2->vc_top == logo_lines 2883 && conp2->vc_bottom == conp2->vc_rows) 2884 conp2->vc_top = 0; 2885 if (logo_shown == vc->vc_num) { 2886 unsigned long p, q; 2887 int i; 2888 2889 p = softback_in; 2890 q = vc->vc_origin + 2891 logo_lines * vc->vc_size_row; 2892 for (i = 0; i < logo_lines; i++) { 2893 if (p == softback_top) 2894 break; 2895 if (p == softback_buf) 2896 p = softback_end; 2897 p -= vc->vc_size_row; 2898 q -= vc->vc_size_row; 2899 scr_memcpyw((u16 *) q, (u16 *) p, 2900 vc->vc_size_row); 2901 } 2902 softback_in = softback_curr = p; 2903 update_region(vc, vc->vc_origin, 2904 logo_lines * vc->vc_cols); 2905 } 2906 logo_shown = FBCON_LOGO_CANSHOW; 2907 } 2908 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK); 2909 fbcon_redraw_softback(vc, disp, lines); 2910 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK); 2911 return; 2912 } 2913 2914 if (!scrollback_phys_max) 2915 return; 2916 2917 scrollback_old = scrollback_current; 2918 scrollback_current -= lines; 2919 if (scrollback_current < 0) 2920 scrollback_current = 0; 2921 else if (scrollback_current > scrollback_max) 2922 scrollback_current = scrollback_max; 2923 if (scrollback_current == scrollback_old) 2924 return; 2925 2926 if (fbcon_is_inactive(vc, info)) 2927 return; 2928 2929 fbcon_cursor(vc, CM_ERASE); 2930 2931 offset = disp->yscroll - scrollback_current; 2932 limit = disp->vrows; 2933 switch (disp->scrollmode) { 2934 case SCROLL_WRAP_MOVE: 2935 info->var.vmode |= FB_VMODE_YWRAP; 2936 break; 2937 case SCROLL_PAN_MOVE: 2938 case SCROLL_PAN_REDRAW: 2939 limit -= vc->vc_rows; 2940 info->var.vmode &= ~FB_VMODE_YWRAP; 2941 break; 2942 } 2943 if (offset < 0) 2944 offset += limit; 2945 else if (offset >= limit) 2946 offset -= limit; 2947 2948 ops->var.xoffset = 0; 2949 ops->var.yoffset = offset * vc->vc_font.height; 2950 ops->update_start(info); 2951 2952 if (!scrollback_current) 2953 fbcon_cursor(vc, CM_DRAW); 2954 } 2955 2956 static int fbcon_set_origin(struct vc_data *vc) 2957 { 2958 if (softback_lines) 2959 fbcon_scrolldelta(vc, softback_lines); 2960 return 0; 2961 } 2962 2963 void fbcon_suspended(struct fb_info *info) 2964 { 2965 struct vc_data *vc = NULL; 2966 struct fbcon_ops *ops = info->fbcon_par; 2967 2968 if (!ops || ops->currcon < 0) 2969 return; 2970 vc = vc_cons[ops->currcon].d; 2971 2972 /* Clear cursor, restore saved data */ 2973 fbcon_cursor(vc, CM_ERASE); 2974 } 2975 2976 void fbcon_resumed(struct fb_info *info) 2977 { 2978 struct vc_data *vc; 2979 struct fbcon_ops *ops = info->fbcon_par; 2980 2981 if (!ops || ops->currcon < 0) 2982 return; 2983 vc = vc_cons[ops->currcon].d; 2984 2985 update_screen(vc); 2986 } 2987 2988 static void fbcon_modechanged(struct fb_info *info) 2989 { 2990 struct fbcon_ops *ops = info->fbcon_par; 2991 struct vc_data *vc; 2992 struct fbcon_display *p; 2993 int rows, cols; 2994 2995 if (!ops || ops->currcon < 0) 2996 return; 2997 vc = vc_cons[ops->currcon].d; 2998 if (vc->vc_mode != KD_TEXT || 2999 registered_fb[con2fb_map[ops->currcon]] != info) 3000 return; 3001 3002 p = &fb_display[vc->vc_num]; 3003 set_blitting_type(vc, info); 3004 3005 if (con_is_visible(vc)) { 3006 var_to_display(p, &info->var, info); 3007 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 3008 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 3009 cols /= vc->vc_font.width; 3010 rows /= vc->vc_font.height; 3011 vc_resize(vc, cols, rows); 3012 updatescrollmode(p, info, vc); 3013 scrollback_max = 0; 3014 scrollback_current = 0; 3015 3016 if (!fbcon_is_inactive(vc, info)) { 3017 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0; 3018 ops->update_start(info); 3019 } 3020 3021 fbcon_set_palette(vc, color_table); 3022 update_screen(vc); 3023 if (softback_buf) 3024 fbcon_update_softback(vc); 3025 } 3026 } 3027 3028 static void fbcon_set_all_vcs(struct fb_info *info) 3029 { 3030 struct fbcon_ops *ops = info->fbcon_par; 3031 struct vc_data *vc; 3032 struct fbcon_display *p; 3033 int i, rows, cols, fg = -1; 3034 3035 if (!ops || ops->currcon < 0) 3036 return; 3037 3038 for (i = first_fb_vc; i <= last_fb_vc; i++) { 3039 vc = vc_cons[i].d; 3040 if (!vc || vc->vc_mode != KD_TEXT || 3041 registered_fb[con2fb_map[i]] != info) 3042 continue; 3043 3044 if (con_is_visible(vc)) { 3045 fg = i; 3046 continue; 3047 } 3048 3049 p = &fb_display[vc->vc_num]; 3050 set_blitting_type(vc, info); 3051 var_to_display(p, &info->var, info); 3052 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 3053 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 3054 cols /= vc->vc_font.width; 3055 rows /= vc->vc_font.height; 3056 vc_resize(vc, cols, rows); 3057 } 3058 3059 if (fg != -1) 3060 fbcon_modechanged(info); 3061 } 3062 3063 3064 void fbcon_update_vcs(struct fb_info *info, bool all) 3065 { 3066 if (all) 3067 fbcon_set_all_vcs(info); 3068 else 3069 fbcon_modechanged(info); 3070 } 3071 EXPORT_SYMBOL(fbcon_update_vcs); 3072 3073 int fbcon_mode_deleted(struct fb_info *info, 3074 struct fb_videomode *mode) 3075 { 3076 struct fb_info *fb_info; 3077 struct fbcon_display *p; 3078 int i, j, found = 0; 3079 3080 /* before deletion, ensure that mode is not in use */ 3081 for (i = first_fb_vc; i <= last_fb_vc; i++) { 3082 j = con2fb_map[i]; 3083 if (j == -1) 3084 continue; 3085 fb_info = registered_fb[j]; 3086 if (fb_info != info) 3087 continue; 3088 p = &fb_display[i]; 3089 if (!p || !p->mode) 3090 continue; 3091 if (fb_mode_is_equal(p->mode, mode)) { 3092 found = 1; 3093 break; 3094 } 3095 } 3096 return found; 3097 } 3098 3099 #ifdef CONFIG_VT_HW_CONSOLE_BINDING 3100 static void fbcon_unbind(void) 3101 { 3102 int ret; 3103 3104 ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc, 3105 fbcon_is_default); 3106 3107 if (!ret) 3108 fbcon_has_console_bind = 0; 3109 } 3110 #else 3111 static inline void fbcon_unbind(void) {} 3112 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */ 3113 3114 /* called with console_lock held */ 3115 void fbcon_fb_unbind(struct fb_info *info) 3116 { 3117 int i, new_idx = -1, ret = 0; 3118 int idx = info->node; 3119 3120 WARN_CONSOLE_UNLOCKED(); 3121 3122 if (!fbcon_has_console_bind) 3123 return; 3124 3125 for (i = first_fb_vc; i <= last_fb_vc; i++) { 3126 if (con2fb_map[i] != idx && 3127 con2fb_map[i] != -1) { 3128 new_idx = con2fb_map[i]; 3129 break; 3130 } 3131 } 3132 3133 if (new_idx != -1) { 3134 for (i = first_fb_vc; i <= last_fb_vc; i++) { 3135 if (con2fb_map[i] == idx) 3136 set_con2fb_map(i, new_idx, 0); 3137 } 3138 } else { 3139 struct fb_info *info = registered_fb[idx]; 3140 3141 /* This is sort of like set_con2fb_map, except it maps 3142 * the consoles to no device and then releases the 3143 * oldinfo to free memory and cancel the cursor blink 3144 * timer. I can imagine this just becoming part of 3145 * set_con2fb_map where new_idx is -1 3146 */ 3147 for (i = first_fb_vc; i <= last_fb_vc; i++) { 3148 if (con2fb_map[i] == idx) { 3149 con2fb_map[i] = -1; 3150 if (!search_fb_in_map(idx)) { 3151 ret = con2fb_release_oldinfo(vc_cons[i].d, 3152 info, NULL, i, 3153 idx, 0); 3154 if (ret) { 3155 con2fb_map[i] = idx; 3156 return; 3157 } 3158 } 3159 } 3160 } 3161 fbcon_unbind(); 3162 } 3163 } 3164 3165 /* called with console_lock held */ 3166 void fbcon_fb_unregistered(struct fb_info *info) 3167 { 3168 int i, idx; 3169 3170 WARN_CONSOLE_UNLOCKED(); 3171 3172 if (deferred_takeover) 3173 return; 3174 3175 idx = info->node; 3176 for (i = first_fb_vc; i <= last_fb_vc; i++) { 3177 if (con2fb_map[i] == idx) 3178 con2fb_map[i] = -1; 3179 } 3180 3181 if (idx == info_idx) { 3182 info_idx = -1; 3183 3184 for_each_registered_fb(i) { 3185 info_idx = i; 3186 break; 3187 } 3188 } 3189 3190 if (info_idx != -1) { 3191 for (i = first_fb_vc; i <= last_fb_vc; i++) { 3192 if (con2fb_map[i] == -1) 3193 con2fb_map[i] = info_idx; 3194 } 3195 } 3196 3197 if (primary_device == idx) 3198 primary_device = -1; 3199 3200 if (!num_registered_fb) 3201 do_unregister_con_driver(&fb_con); 3202 } 3203 3204 void fbcon_remap_all(struct fb_info *info) 3205 { 3206 int i, idx = info->node; 3207 3208 console_lock(); 3209 if (deferred_takeover) { 3210 for (i = first_fb_vc; i <= last_fb_vc; i++) 3211 con2fb_map_boot[i] = idx; 3212 fbcon_map_override(); 3213 console_unlock(); 3214 return; 3215 } 3216 3217 for (i = first_fb_vc; i <= last_fb_vc; i++) 3218 set_con2fb_map(i, idx, 0); 3219 3220 if (con_is_bound(&fb_con)) { 3221 printk(KERN_INFO "fbcon: Remapping primary device, " 3222 "fb%i, to tty %i-%i\n", idx, 3223 first_fb_vc + 1, last_fb_vc + 1); 3224 info_idx = idx; 3225 } 3226 console_unlock(); 3227 } 3228 3229 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY 3230 static void fbcon_select_primary(struct fb_info *info) 3231 { 3232 if (!map_override && primary_device == -1 && 3233 fb_is_primary_device(info)) { 3234 int i; 3235 3236 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n", 3237 info->fix.id, info->node); 3238 primary_device = info->node; 3239 3240 for (i = first_fb_vc; i <= last_fb_vc; i++) 3241 con2fb_map_boot[i] = primary_device; 3242 3243 if (con_is_bound(&fb_con)) { 3244 printk(KERN_INFO "fbcon: Remapping primary device, " 3245 "fb%i, to tty %i-%i\n", info->node, 3246 first_fb_vc + 1, last_fb_vc + 1); 3247 info_idx = primary_device; 3248 } 3249 } 3250 3251 } 3252 #else 3253 static inline void fbcon_select_primary(struct fb_info *info) 3254 { 3255 return; 3256 } 3257 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */ 3258 3259 /* called with console_lock held */ 3260 int fbcon_fb_registered(struct fb_info *info) 3261 { 3262 int ret = 0, i, idx; 3263 3264 WARN_CONSOLE_UNLOCKED(); 3265 3266 idx = info->node; 3267 fbcon_select_primary(info); 3268 3269 if (deferred_takeover) { 3270 pr_info("fbcon: Deferring console take-over\n"); 3271 return 0; 3272 } 3273 3274 if (info_idx == -1) { 3275 for (i = first_fb_vc; i <= last_fb_vc; i++) { 3276 if (con2fb_map_boot[i] == idx) { 3277 info_idx = idx; 3278 break; 3279 } 3280 } 3281 3282 if (info_idx != -1) 3283 ret = do_fbcon_takeover(1); 3284 } else { 3285 for (i = first_fb_vc; i <= last_fb_vc; i++) { 3286 if (con2fb_map_boot[i] == idx) 3287 set_con2fb_map(i, idx, 0); 3288 } 3289 } 3290 3291 return ret; 3292 } 3293 3294 void fbcon_fb_blanked(struct fb_info *info, int blank) 3295 { 3296 struct fbcon_ops *ops = info->fbcon_par; 3297 struct vc_data *vc; 3298 3299 if (!ops || ops->currcon < 0) 3300 return; 3301 3302 vc = vc_cons[ops->currcon].d; 3303 if (vc->vc_mode != KD_TEXT || 3304 registered_fb[con2fb_map[ops->currcon]] != info) 3305 return; 3306 3307 if (con_is_visible(vc)) { 3308 if (blank) 3309 do_blank_screen(0); 3310 else 3311 do_unblank_screen(0); 3312 } 3313 ops->blank_state = blank; 3314 } 3315 3316 void fbcon_new_modelist(struct fb_info *info) 3317 { 3318 int i; 3319 struct vc_data *vc; 3320 struct fb_var_screeninfo var; 3321 const struct fb_videomode *mode; 3322 3323 for (i = first_fb_vc; i <= last_fb_vc; i++) { 3324 if (registered_fb[con2fb_map[i]] != info) 3325 continue; 3326 if (!fb_display[i].mode) 3327 continue; 3328 vc = vc_cons[i].d; 3329 display_to_var(&var, &fb_display[i]); 3330 mode = fb_find_nearest_mode(fb_display[i].mode, 3331 &info->modelist); 3332 fb_videomode_to_var(&var, mode); 3333 fbcon_set_disp(info, &var, vc->vc_num); 3334 } 3335 } 3336 3337 void fbcon_get_requirement(struct fb_info *info, 3338 struct fb_blit_caps *caps) 3339 { 3340 struct vc_data *vc; 3341 struct fbcon_display *p; 3342 3343 if (caps->flags) { 3344 int i, charcnt; 3345 3346 for (i = first_fb_vc; i <= last_fb_vc; i++) { 3347 vc = vc_cons[i].d; 3348 if (vc && vc->vc_mode == KD_TEXT && 3349 info->node == con2fb_map[i]) { 3350 p = &fb_display[i]; 3351 caps->x |= 1 << (vc->vc_font.width - 1); 3352 caps->y |= 1 << (vc->vc_font.height - 1); 3353 charcnt = (p->userfont) ? 3354 FNTCHARCNT(p->fontdata) : 256; 3355 if (caps->len < charcnt) 3356 caps->len = charcnt; 3357 } 3358 } 3359 } else { 3360 vc = vc_cons[fg_console].d; 3361 3362 if (vc && vc->vc_mode == KD_TEXT && 3363 info->node == con2fb_map[fg_console]) { 3364 p = &fb_display[fg_console]; 3365 caps->x = 1 << (vc->vc_font.width - 1); 3366 caps->y = 1 << (vc->vc_font.height - 1); 3367 caps->len = (p->userfont) ? 3368 FNTCHARCNT(p->fontdata) : 256; 3369 } 3370 } 3371 } 3372 3373 int fbcon_set_con2fb_map_ioctl(void __user *argp) 3374 { 3375 struct fb_con2fbmap con2fb; 3376 int ret; 3377 3378 if (copy_from_user(&con2fb, argp, sizeof(con2fb))) 3379 return -EFAULT; 3380 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) 3381 return -EINVAL; 3382 if (con2fb.framebuffer >= FB_MAX) 3383 return -EINVAL; 3384 if (!registered_fb[con2fb.framebuffer]) 3385 request_module("fb%d", con2fb.framebuffer); 3386 if (!registered_fb[con2fb.framebuffer]) { 3387 return -EINVAL; 3388 } 3389 3390 console_lock(); 3391 ret = set_con2fb_map(con2fb.console - 1, 3392 con2fb.framebuffer, 1); 3393 console_unlock(); 3394 3395 return ret; 3396 } 3397 3398 int fbcon_get_con2fb_map_ioctl(void __user *argp) 3399 { 3400 struct fb_con2fbmap con2fb; 3401 3402 if (copy_from_user(&con2fb, argp, sizeof(con2fb))) 3403 return -EFAULT; 3404 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) 3405 return -EINVAL; 3406 3407 console_lock(); 3408 con2fb.framebuffer = con2fb_map[con2fb.console - 1]; 3409 console_unlock(); 3410 3411 return copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0; 3412 } 3413 3414 /* 3415 * The console `switch' structure for the frame buffer based console 3416 */ 3417 3418 static const struct consw fb_con = { 3419 .owner = THIS_MODULE, 3420 .con_startup = fbcon_startup, 3421 .con_init = fbcon_init, 3422 .con_deinit = fbcon_deinit, 3423 .con_clear = fbcon_clear, 3424 .con_putc = fbcon_putc, 3425 .con_putcs = fbcon_putcs, 3426 .con_cursor = fbcon_cursor, 3427 .con_scroll = fbcon_scroll, 3428 .con_switch = fbcon_switch, 3429 .con_blank = fbcon_blank, 3430 .con_font_set = fbcon_set_font, 3431 .con_font_get = fbcon_get_font, 3432 .con_font_default = fbcon_set_def_font, 3433 .con_font_copy = fbcon_copy_font, 3434 .con_set_palette = fbcon_set_palette, 3435 .con_scrolldelta = fbcon_scrolldelta, 3436 .con_set_origin = fbcon_set_origin, 3437 .con_invert_region = fbcon_invert_region, 3438 .con_screen_pos = fbcon_screen_pos, 3439 .con_getxy = fbcon_getxy, 3440 .con_resize = fbcon_resize, 3441 .con_debug_enter = fbcon_debug_enter, 3442 .con_debug_leave = fbcon_debug_leave, 3443 }; 3444 3445 static ssize_t store_rotate(struct device *device, 3446 struct device_attribute *attr, const char *buf, 3447 size_t count) 3448 { 3449 struct fb_info *info; 3450 int rotate, idx; 3451 char **last = NULL; 3452 3453 console_lock(); 3454 idx = con2fb_map[fg_console]; 3455 3456 if (idx == -1 || registered_fb[idx] == NULL) 3457 goto err; 3458 3459 info = registered_fb[idx]; 3460 rotate = simple_strtoul(buf, last, 0); 3461 fbcon_rotate(info, rotate); 3462 err: 3463 console_unlock(); 3464 return count; 3465 } 3466 3467 static ssize_t store_rotate_all(struct device *device, 3468 struct device_attribute *attr,const char *buf, 3469 size_t count) 3470 { 3471 struct fb_info *info; 3472 int rotate, idx; 3473 char **last = NULL; 3474 3475 console_lock(); 3476 idx = con2fb_map[fg_console]; 3477 3478 if (idx == -1 || registered_fb[idx] == NULL) 3479 goto err; 3480 3481 info = registered_fb[idx]; 3482 rotate = simple_strtoul(buf, last, 0); 3483 fbcon_rotate_all(info, rotate); 3484 err: 3485 console_unlock(); 3486 return count; 3487 } 3488 3489 static ssize_t show_rotate(struct device *device, 3490 struct device_attribute *attr,char *buf) 3491 { 3492 struct fb_info *info; 3493 int rotate = 0, idx; 3494 3495 console_lock(); 3496 idx = con2fb_map[fg_console]; 3497 3498 if (idx == -1 || registered_fb[idx] == NULL) 3499 goto err; 3500 3501 info = registered_fb[idx]; 3502 rotate = fbcon_get_rotate(info); 3503 err: 3504 console_unlock(); 3505 return snprintf(buf, PAGE_SIZE, "%d\n", rotate); 3506 } 3507 3508 static ssize_t show_cursor_blink(struct device *device, 3509 struct device_attribute *attr, char *buf) 3510 { 3511 struct fb_info *info; 3512 struct fbcon_ops *ops; 3513 int idx, blink = -1; 3514 3515 console_lock(); 3516 idx = con2fb_map[fg_console]; 3517 3518 if (idx == -1 || registered_fb[idx] == NULL) 3519 goto err; 3520 3521 info = registered_fb[idx]; 3522 ops = info->fbcon_par; 3523 3524 if (!ops) 3525 goto err; 3526 3527 blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0; 3528 err: 3529 console_unlock(); 3530 return snprintf(buf, PAGE_SIZE, "%d\n", blink); 3531 } 3532 3533 static ssize_t store_cursor_blink(struct device *device, 3534 struct device_attribute *attr, 3535 const char *buf, size_t count) 3536 { 3537 struct fb_info *info; 3538 int blink, idx; 3539 char **last = NULL; 3540 3541 console_lock(); 3542 idx = con2fb_map[fg_console]; 3543 3544 if (idx == -1 || registered_fb[idx] == NULL) 3545 goto err; 3546 3547 info = registered_fb[idx]; 3548 3549 if (!info->fbcon_par) 3550 goto err; 3551 3552 blink = simple_strtoul(buf, last, 0); 3553 3554 if (blink) { 3555 fbcon_cursor_noblink = 0; 3556 fbcon_add_cursor_timer(info); 3557 } else { 3558 fbcon_cursor_noblink = 1; 3559 fbcon_del_cursor_timer(info); 3560 } 3561 3562 err: 3563 console_unlock(); 3564 return count; 3565 } 3566 3567 static struct device_attribute device_attrs[] = { 3568 __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate), 3569 __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all), 3570 __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink, 3571 store_cursor_blink), 3572 }; 3573 3574 static int fbcon_init_device(void) 3575 { 3576 int i, error = 0; 3577 3578 fbcon_has_sysfs = 1; 3579 3580 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) { 3581 error = device_create_file(fbcon_device, &device_attrs[i]); 3582 3583 if (error) 3584 break; 3585 } 3586 3587 if (error) { 3588 while (--i >= 0) 3589 device_remove_file(fbcon_device, &device_attrs[i]); 3590 3591 fbcon_has_sysfs = 0; 3592 } 3593 3594 return 0; 3595 } 3596 3597 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 3598 static void fbcon_register_existing_fbs(struct work_struct *work) 3599 { 3600 int i; 3601 3602 console_lock(); 3603 3604 for_each_registered_fb(i) 3605 fbcon_fb_registered(registered_fb[i]); 3606 3607 console_unlock(); 3608 } 3609 3610 static struct notifier_block fbcon_output_nb; 3611 static DECLARE_WORK(fbcon_deferred_takeover_work, fbcon_register_existing_fbs); 3612 3613 static int fbcon_output_notifier(struct notifier_block *nb, 3614 unsigned long action, void *data) 3615 { 3616 WARN_CONSOLE_UNLOCKED(); 3617 3618 pr_info("fbcon: Taking over console\n"); 3619 3620 dummycon_unregister_output_notifier(&fbcon_output_nb); 3621 deferred_takeover = false; 3622 logo_shown = FBCON_LOGO_DONTSHOW; 3623 3624 /* We may get called in atomic context */ 3625 schedule_work(&fbcon_deferred_takeover_work); 3626 3627 return NOTIFY_OK; 3628 } 3629 #endif 3630 3631 static void fbcon_start(void) 3632 { 3633 WARN_CONSOLE_UNLOCKED(); 3634 3635 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 3636 if (conswitchp != &dummy_con) 3637 deferred_takeover = false; 3638 3639 if (deferred_takeover) { 3640 fbcon_output_nb.notifier_call = fbcon_output_notifier; 3641 dummycon_register_output_notifier(&fbcon_output_nb); 3642 return; 3643 } 3644 #endif 3645 3646 if (num_registered_fb) { 3647 int i; 3648 3649 for_each_registered_fb(i) { 3650 info_idx = i; 3651 break; 3652 } 3653 3654 do_fbcon_takeover(0); 3655 } 3656 } 3657 3658 static void fbcon_exit(void) 3659 { 3660 struct fb_info *info; 3661 int i, j, mapped; 3662 3663 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 3664 if (deferred_takeover) { 3665 dummycon_unregister_output_notifier(&fbcon_output_nb); 3666 deferred_takeover = false; 3667 } 3668 #endif 3669 3670 kvfree((void *)softback_buf); 3671 softback_buf = 0UL; 3672 3673 for_each_registered_fb(i) { 3674 int pending = 0; 3675 3676 mapped = 0; 3677 info = registered_fb[i]; 3678 3679 if (info->queue.func) 3680 pending = cancel_work_sync(&info->queue); 3681 DPRINTK("fbcon: %s pending work\n", (pending ? "canceled" : 3682 "no")); 3683 3684 for (j = first_fb_vc; j <= last_fb_vc; j++) { 3685 if (con2fb_map[j] == i) { 3686 mapped = 1; 3687 con2fb_map[j] = -1; 3688 } 3689 } 3690 3691 if (mapped) { 3692 if (info->fbops->fb_release) 3693 info->fbops->fb_release(info, 0); 3694 module_put(info->fbops->owner); 3695 3696 if (info->fbcon_par) { 3697 struct fbcon_ops *ops = info->fbcon_par; 3698 3699 fbcon_del_cursor_timer(info); 3700 kfree(ops->cursor_src); 3701 kfree(ops->cursor_state.mask); 3702 kfree(info->fbcon_par); 3703 info->fbcon_par = NULL; 3704 } 3705 3706 if (info->queue.func == fb_flashcursor) 3707 info->queue.func = NULL; 3708 } 3709 } 3710 } 3711 3712 void __init fb_console_init(void) 3713 { 3714 int i; 3715 3716 console_lock(); 3717 fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL, 3718 "fbcon"); 3719 3720 if (IS_ERR(fbcon_device)) { 3721 printk(KERN_WARNING "Unable to create device " 3722 "for fbcon; errno = %ld\n", 3723 PTR_ERR(fbcon_device)); 3724 fbcon_device = NULL; 3725 } else 3726 fbcon_init_device(); 3727 3728 for (i = 0; i < MAX_NR_CONSOLES; i++) 3729 con2fb_map[i] = -1; 3730 3731 fbcon_start(); 3732 console_unlock(); 3733 } 3734 3735 #ifdef MODULE 3736 3737 static void __exit fbcon_deinit_device(void) 3738 { 3739 int i; 3740 3741 if (fbcon_has_sysfs) { 3742 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) 3743 device_remove_file(fbcon_device, &device_attrs[i]); 3744 3745 fbcon_has_sysfs = 0; 3746 } 3747 } 3748 3749 void __exit fb_console_exit(void) 3750 { 3751 console_lock(); 3752 fbcon_deinit_device(); 3753 device_destroy(fb_class, MKDEV(0, 0)); 3754 fbcon_exit(); 3755 do_unregister_con_driver(&fb_con); 3756 console_unlock(); 3757 } 3758 #endif 3759