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 #include <linux/module.h> 60 #include <linux/types.h> 61 #include <linux/fs.h> 62 #include <linux/kernel.h> 63 #include <linux/delay.h> /* MSch: for IRQ probe */ 64 #include <linux/console.h> 65 #include <linux/string.h> 66 #include <linux/kd.h> 67 #include <linux/slab.h> 68 #include <linux/fb.h> 69 #include <linux/fbcon.h> 70 #include <linux/vt_kern.h> 71 #include <linux/selection.h> 72 #include <linux/font.h> 73 #include <linux/smp.h> 74 #include <linux/init.h> 75 #include <linux/interrupt.h> 76 #include <linux/crc32.h> /* For counting font checksums */ 77 #include <linux/uaccess.h> 78 #include <asm/fb.h> 79 #include <asm/irq.h> 80 81 #include "fbcon.h" 82 83 /* 84 * FIXME: Locking 85 * 86 * - fbcon state itself is protected by the console_lock, and the code does a 87 * pretty good job at making sure that lock is held everywhere it's needed. 88 * 89 * - access to the registered_fb array is entirely unprotected. This should use 90 * proper object lifetime handling, i.e. get/put_fb_info. This also means 91 * switching from indices to proper pointers for fb_info everywhere. 92 * 93 * - fbcon doesn't bother with fb_lock/unlock at all. This is buggy, since it 94 * means concurrent access to the same fbdev from both fbcon and userspace 95 * will blow up. To fix this all fbcon calls from fbmem.c need to be moved out 96 * of fb_lock/unlock protected sections, since otherwise we'll recurse and 97 * deadlock eventually. Aside: Due to these deadlock issues the fbdev code in 98 * fbmem.c cannot use locking asserts, and there's lots of callers which get 99 * the rules wrong, e.g. fbsysfs.c entirely missed fb_lock/unlock calls too. 100 */ 101 102 enum { 103 FBCON_LOGO_CANSHOW = -1, /* the logo can be shown */ 104 FBCON_LOGO_DRAW = -2, /* draw the logo to a console */ 105 FBCON_LOGO_DONTSHOW = -3 /* do not show the logo */ 106 }; 107 108 static struct fbcon_display fb_display[MAX_NR_CONSOLES]; 109 110 static signed char con2fb_map[MAX_NR_CONSOLES]; 111 static signed char con2fb_map_boot[MAX_NR_CONSOLES]; 112 113 static int logo_lines; 114 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO 115 enums. */ 116 static int logo_shown = FBCON_LOGO_CANSHOW; 117 /* console mappings */ 118 static int first_fb_vc; 119 static int last_fb_vc = MAX_NR_CONSOLES - 1; 120 static int fbcon_is_default = 1; 121 static int primary_device = -1; 122 static int fbcon_has_console_bind; 123 124 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY 125 static int map_override; 126 127 static inline void fbcon_map_override(void) 128 { 129 map_override = 1; 130 } 131 #else 132 static inline void fbcon_map_override(void) 133 { 134 } 135 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY */ 136 137 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 138 static bool deferred_takeover = true; 139 #else 140 #define deferred_takeover false 141 #endif 142 143 /* font data */ 144 static char fontname[40]; 145 146 /* current fb_info */ 147 static int info_idx = -1; 148 149 /* console rotation */ 150 static int initial_rotation = -1; 151 static int fbcon_has_sysfs; 152 static int margin_color; 153 154 static const struct consw fb_con; 155 156 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row) 157 158 static int fbcon_cursor_noblink; 159 160 #define divides(a, b) ((!(a) || (b)%(a)) ? 0 : 1) 161 162 /* 163 * Interface used by the world 164 */ 165 166 static const char *fbcon_startup(void); 167 static void fbcon_init(struct vc_data *vc, int init); 168 static void fbcon_deinit(struct vc_data *vc); 169 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height, 170 int width); 171 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos); 172 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s, 173 int count, int ypos, int xpos); 174 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only); 175 static void fbcon_cursor(struct vc_data *vc, int mode); 176 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx, 177 int height, int width); 178 static int fbcon_switch(struct vc_data *vc); 179 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch); 180 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table); 181 182 /* 183 * Internal routines 184 */ 185 static __inline__ void ywrap_up(struct vc_data *vc, int count); 186 static __inline__ void ywrap_down(struct vc_data *vc, int count); 187 static __inline__ void ypan_up(struct vc_data *vc, int count); 188 static __inline__ void ypan_down(struct vc_data *vc, int count); 189 static void fbcon_bmove_rec(struct vc_data *vc, struct fbcon_display *p, int sy, int sx, 190 int dy, int dx, int height, int width, u_int y_break); 191 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var, 192 int unit); 193 static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p, 194 int line, int count, int dy); 195 static void fbcon_modechanged(struct fb_info *info); 196 static void fbcon_set_all_vcs(struct fb_info *info); 197 static void fbcon_start(void); 198 static void fbcon_exit(void); 199 static struct device *fbcon_device; 200 201 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION 202 static inline void fbcon_set_rotation(struct fb_info *info) 203 { 204 struct fbcon_ops *ops = info->fbcon_par; 205 206 if (!(info->flags & FBINFO_MISC_TILEBLITTING) && 207 ops->p->con_rotate < 4) 208 ops->rotate = ops->p->con_rotate; 209 else 210 ops->rotate = 0; 211 } 212 213 static void fbcon_rotate(struct fb_info *info, u32 rotate) 214 { 215 struct fbcon_ops *ops= info->fbcon_par; 216 struct fb_info *fb_info; 217 218 if (!ops || ops->currcon == -1) 219 return; 220 221 fb_info = registered_fb[con2fb_map[ops->currcon]]; 222 223 if (info == fb_info) { 224 struct fbcon_display *p = &fb_display[ops->currcon]; 225 226 if (rotate < 4) 227 p->con_rotate = rotate; 228 else 229 p->con_rotate = 0; 230 231 fbcon_modechanged(info); 232 } 233 } 234 235 static void fbcon_rotate_all(struct fb_info *info, u32 rotate) 236 { 237 struct fbcon_ops *ops = info->fbcon_par; 238 struct vc_data *vc; 239 struct fbcon_display *p; 240 int i; 241 242 if (!ops || ops->currcon < 0 || rotate > 3) 243 return; 244 245 for (i = first_fb_vc; i <= last_fb_vc; i++) { 246 vc = vc_cons[i].d; 247 if (!vc || vc->vc_mode != KD_TEXT || 248 registered_fb[con2fb_map[i]] != info) 249 continue; 250 251 p = &fb_display[vc->vc_num]; 252 p->con_rotate = rotate; 253 } 254 255 fbcon_set_all_vcs(info); 256 } 257 #else 258 static inline void fbcon_set_rotation(struct fb_info *info) 259 { 260 struct fbcon_ops *ops = info->fbcon_par; 261 262 ops->rotate = FB_ROTATE_UR; 263 } 264 265 static void fbcon_rotate(struct fb_info *info, u32 rotate) 266 { 267 return; 268 } 269 270 static void fbcon_rotate_all(struct fb_info *info, u32 rotate) 271 { 272 return; 273 } 274 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */ 275 276 static int fbcon_get_rotate(struct fb_info *info) 277 { 278 struct fbcon_ops *ops = info->fbcon_par; 279 280 return (ops) ? ops->rotate : 0; 281 } 282 283 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info) 284 { 285 struct fbcon_ops *ops = info->fbcon_par; 286 287 return (info->state != FBINFO_STATE_RUNNING || 288 vc->vc_mode != KD_TEXT || ops->graphics); 289 } 290 291 static int get_color(struct vc_data *vc, struct fb_info *info, 292 u16 c, int is_fg) 293 { 294 int depth = fb_get_color_depth(&info->var, &info->fix); 295 int color = 0; 296 297 if (console_blanked) { 298 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff; 299 300 c = vc->vc_video_erase_char & charmask; 301 } 302 303 if (depth != 1) 304 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c) 305 : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c); 306 307 switch (depth) { 308 case 1: 309 { 310 int col = mono_col(info); 311 /* 0 or 1 */ 312 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0; 313 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col; 314 315 if (console_blanked) 316 fg = bg; 317 318 color = (is_fg) ? fg : bg; 319 break; 320 } 321 case 2: 322 /* 323 * Scale down 16-colors to 4 colors. Default 4-color palette 324 * is grayscale. However, simply dividing the values by 4 325 * will not work, as colors 1, 2 and 3 will be scaled-down 326 * to zero rendering them invisible. So empirically convert 327 * colors to a sane 4-level grayscale. 328 */ 329 switch (color) { 330 case 0: 331 color = 0; /* black */ 332 break; 333 case 1 ... 6: 334 color = 2; /* white */ 335 break; 336 case 7 ... 8: 337 color = 1; /* gray */ 338 break; 339 default: 340 color = 3; /* intense white */ 341 break; 342 } 343 break; 344 case 3: 345 /* 346 * Last 8 entries of default 16-color palette is a more intense 347 * version of the first 8 (i.e., same chrominance, different 348 * luminance). 349 */ 350 color &= 7; 351 break; 352 } 353 354 355 return color; 356 } 357 358 static void fb_flashcursor(struct work_struct *work) 359 { 360 struct fb_info *info = container_of(work, struct fb_info, queue); 361 struct fbcon_ops *ops = info->fbcon_par; 362 struct vc_data *vc = NULL; 363 int c; 364 int mode; 365 int ret; 366 367 /* FIXME: we should sort out the unbind locking instead */ 368 /* instead we just fail to flash the cursor if we can't get 369 * the lock instead of blocking fbcon deinit */ 370 ret = console_trylock(); 371 if (ret == 0) 372 return; 373 374 if (ops && ops->currcon != -1) 375 vc = vc_cons[ops->currcon].d; 376 377 if (!vc || !con_is_visible(vc) || 378 registered_fb[con2fb_map[vc->vc_num]] != info || 379 vc->vc_deccm != 1) { 380 console_unlock(); 381 return; 382 } 383 384 c = scr_readw((u16 *) vc->vc_pos); 385 mode = (!ops->cursor_flash || ops->cursor_state.enable) ? 386 CM_ERASE : CM_DRAW; 387 ops->cursor(vc, info, mode, get_color(vc, info, c, 1), 388 get_color(vc, info, c, 0)); 389 console_unlock(); 390 } 391 392 static void cursor_timer_handler(struct timer_list *t) 393 { 394 struct fbcon_ops *ops = from_timer(ops, t, cursor_timer); 395 struct fb_info *info = ops->info; 396 397 queue_work(system_power_efficient_wq, &info->queue); 398 mod_timer(&ops->cursor_timer, jiffies + ops->cur_blink_jiffies); 399 } 400 401 static void fbcon_add_cursor_timer(struct fb_info *info) 402 { 403 struct fbcon_ops *ops = info->fbcon_par; 404 405 if ((!info->queue.func || info->queue.func == fb_flashcursor) && 406 !(ops->flags & FBCON_FLAGS_CURSOR_TIMER) && 407 !fbcon_cursor_noblink) { 408 if (!info->queue.func) 409 INIT_WORK(&info->queue, fb_flashcursor); 410 411 timer_setup(&ops->cursor_timer, cursor_timer_handler, 0); 412 mod_timer(&ops->cursor_timer, jiffies + ops->cur_blink_jiffies); 413 ops->flags |= FBCON_FLAGS_CURSOR_TIMER; 414 } 415 } 416 417 static void fbcon_del_cursor_timer(struct fb_info *info) 418 { 419 struct fbcon_ops *ops = info->fbcon_par; 420 421 if (info->queue.func == fb_flashcursor && 422 ops->flags & FBCON_FLAGS_CURSOR_TIMER) { 423 del_timer_sync(&ops->cursor_timer); 424 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER; 425 } 426 } 427 428 #ifndef MODULE 429 static int __init fb_console_setup(char *this_opt) 430 { 431 char *options; 432 int i, j; 433 434 if (!this_opt || !*this_opt) 435 return 1; 436 437 while ((options = strsep(&this_opt, ",")) != NULL) { 438 if (!strncmp(options, "font:", 5)) { 439 strlcpy(fontname, options + 5, sizeof(fontname)); 440 continue; 441 } 442 443 if (!strncmp(options, "scrollback:", 11)) { 444 pr_warn("Ignoring scrollback size option\n"); 445 continue; 446 } 447 448 if (!strncmp(options, "map:", 4)) { 449 options += 4; 450 if (*options) { 451 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) { 452 if (!options[j]) 453 j = 0; 454 con2fb_map_boot[i] = 455 (options[j++]-'0') % FB_MAX; 456 } 457 458 fbcon_map_override(); 459 } 460 continue; 461 } 462 463 if (!strncmp(options, "vc:", 3)) { 464 options += 3; 465 if (*options) 466 first_fb_vc = simple_strtoul(options, &options, 10) - 1; 467 if (first_fb_vc < 0) 468 first_fb_vc = 0; 469 if (*options++ == '-') 470 last_fb_vc = simple_strtoul(options, &options, 10) - 1; 471 fbcon_is_default = 0; 472 continue; 473 } 474 475 if (!strncmp(options, "rotate:", 7)) { 476 options += 7; 477 if (*options) 478 initial_rotation = simple_strtoul(options, &options, 0); 479 if (initial_rotation > 3) 480 initial_rotation = 0; 481 continue; 482 } 483 484 if (!strncmp(options, "margin:", 7)) { 485 options += 7; 486 if (*options) 487 margin_color = simple_strtoul(options, &options, 0); 488 continue; 489 } 490 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 491 if (!strcmp(options, "nodefer")) { 492 deferred_takeover = false; 493 continue; 494 } 495 #endif 496 497 if (!strncmp(options, "logo-pos:", 9)) { 498 options += 9; 499 if (!strcmp(options, "center")) 500 fb_center_logo = true; 501 continue; 502 } 503 504 if (!strncmp(options, "logo-count:", 11)) { 505 options += 11; 506 if (*options) 507 fb_logo_count = simple_strtol(options, &options, 0); 508 continue; 509 } 510 } 511 return 1; 512 } 513 514 __setup("fbcon=", fb_console_setup); 515 #endif 516 517 static int search_fb_in_map(int idx) 518 { 519 int i, retval = 0; 520 521 for (i = first_fb_vc; i <= last_fb_vc; i++) { 522 if (con2fb_map[i] == idx) 523 retval = 1; 524 } 525 return retval; 526 } 527 528 static int search_for_mapped_con(void) 529 { 530 int i, retval = 0; 531 532 for (i = first_fb_vc; i <= last_fb_vc; i++) { 533 if (con2fb_map[i] != -1) 534 retval = 1; 535 } 536 return retval; 537 } 538 539 static int do_fbcon_takeover(int show_logo) 540 { 541 int err, i; 542 543 if (!num_registered_fb) 544 return -ENODEV; 545 546 if (!show_logo) 547 logo_shown = FBCON_LOGO_DONTSHOW; 548 549 for (i = first_fb_vc; i <= last_fb_vc; i++) 550 con2fb_map[i] = info_idx; 551 552 err = do_take_over_console(&fb_con, first_fb_vc, last_fb_vc, 553 fbcon_is_default); 554 555 if (err) { 556 for (i = first_fb_vc; i <= last_fb_vc; i++) 557 con2fb_map[i] = -1; 558 info_idx = -1; 559 } else { 560 fbcon_has_console_bind = 1; 561 } 562 563 return err; 564 } 565 566 #ifdef MODULE 567 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info, 568 int cols, int rows, int new_cols, int new_rows) 569 { 570 logo_shown = FBCON_LOGO_DONTSHOW; 571 } 572 #else 573 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info, 574 int cols, int rows, int new_cols, int new_rows) 575 { 576 /* Need to make room for the logo */ 577 struct fbcon_ops *ops = info->fbcon_par; 578 int cnt, erase = vc->vc_video_erase_char, step; 579 unsigned short *save = NULL, *r, *q; 580 int logo_height; 581 582 if (info->fbops->owner) { 583 logo_shown = FBCON_LOGO_DONTSHOW; 584 return; 585 } 586 587 /* 588 * remove underline attribute from erase character 589 * if black and white framebuffer. 590 */ 591 if (fb_get_color_depth(&info->var, &info->fix) == 1) 592 erase &= ~0x400; 593 logo_height = fb_prepare_logo(info, ops->rotate); 594 logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height); 595 q = (unsigned short *) (vc->vc_origin + 596 vc->vc_size_row * rows); 597 step = logo_lines * cols; 598 for (r = q - logo_lines * cols; r < q; r++) 599 if (scr_readw(r) != vc->vc_video_erase_char) 600 break; 601 if (r != q && new_rows >= rows + logo_lines) { 602 save = kmalloc(array3_size(logo_lines, new_cols, 2), 603 GFP_KERNEL); 604 if (save) { 605 int i = cols < new_cols ? cols : new_cols; 606 scr_memsetw(save, erase, array3_size(logo_lines, new_cols, 2)); 607 r = q - step; 608 for (cnt = 0; cnt < logo_lines; cnt++, r += i) 609 scr_memcpyw(save + cnt * new_cols, r, 2 * i); 610 r = q; 611 } 612 } 613 if (r == q) { 614 /* We can scroll screen down */ 615 r = q - step - cols; 616 for (cnt = rows - logo_lines; cnt > 0; cnt--) { 617 scr_memcpyw(r + step, r, vc->vc_size_row); 618 r -= cols; 619 } 620 if (!save) { 621 int lines; 622 if (vc->state.y + logo_lines >= rows) 623 lines = rows - vc->state.y - 1; 624 else 625 lines = logo_lines; 626 vc->state.y += lines; 627 vc->vc_pos += lines * vc->vc_size_row; 628 } 629 } 630 scr_memsetw((unsigned short *) vc->vc_origin, 631 erase, 632 vc->vc_size_row * logo_lines); 633 634 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) { 635 fbcon_clear_margins(vc, 0); 636 update_screen(vc); 637 } 638 639 if (save) { 640 q = (unsigned short *) (vc->vc_origin + 641 vc->vc_size_row * 642 rows); 643 scr_memcpyw(q, save, array3_size(logo_lines, new_cols, 2)); 644 vc->state.y += logo_lines; 645 vc->vc_pos += logo_lines * vc->vc_size_row; 646 kfree(save); 647 } 648 649 if (logo_shown == FBCON_LOGO_DONTSHOW) 650 return; 651 652 if (logo_lines > vc->vc_bottom) { 653 logo_shown = FBCON_LOGO_CANSHOW; 654 printk(KERN_INFO 655 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n"); 656 } else { 657 logo_shown = FBCON_LOGO_DRAW; 658 vc->vc_top = logo_lines; 659 } 660 } 661 #endif /* MODULE */ 662 663 #ifdef CONFIG_FB_TILEBLITTING 664 static void set_blitting_type(struct vc_data *vc, struct fb_info *info) 665 { 666 struct fbcon_ops *ops = info->fbcon_par; 667 668 ops->p = &fb_display[vc->vc_num]; 669 670 if ((info->flags & FBINFO_MISC_TILEBLITTING)) 671 fbcon_set_tileops(vc, info); 672 else { 673 fbcon_set_rotation(info); 674 fbcon_set_bitops(ops); 675 } 676 } 677 678 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount) 679 { 680 int err = 0; 681 682 if (info->flags & FBINFO_MISC_TILEBLITTING && 683 info->tileops->fb_get_tilemax(info) < charcount) 684 err = 1; 685 686 return err; 687 } 688 #else 689 static void set_blitting_type(struct vc_data *vc, struct fb_info *info) 690 { 691 struct fbcon_ops *ops = info->fbcon_par; 692 693 info->flags &= ~FBINFO_MISC_TILEBLITTING; 694 ops->p = &fb_display[vc->vc_num]; 695 fbcon_set_rotation(info); 696 fbcon_set_bitops(ops); 697 } 698 699 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount) 700 { 701 return 0; 702 } 703 704 #endif /* CONFIG_MISC_TILEBLITTING */ 705 706 707 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info, 708 int unit, int oldidx) 709 { 710 struct fbcon_ops *ops = NULL; 711 int err = 0; 712 713 if (!try_module_get(info->fbops->owner)) 714 err = -ENODEV; 715 716 if (!err && info->fbops->fb_open && 717 info->fbops->fb_open(info, 0)) 718 err = -ENODEV; 719 720 if (!err) { 721 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL); 722 if (!ops) 723 err = -ENOMEM; 724 } 725 726 if (!err) { 727 ops->cur_blink_jiffies = HZ / 5; 728 ops->info = info; 729 info->fbcon_par = ops; 730 731 if (vc) 732 set_blitting_type(vc, info); 733 } 734 735 if (err) { 736 con2fb_map[unit] = oldidx; 737 module_put(info->fbops->owner); 738 } 739 740 return err; 741 } 742 743 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo, 744 struct fb_info *newinfo, int unit, 745 int oldidx, int found) 746 { 747 struct fbcon_ops *ops = oldinfo->fbcon_par; 748 int err = 0, ret; 749 750 if (oldinfo->fbops->fb_release && 751 oldinfo->fbops->fb_release(oldinfo, 0)) { 752 con2fb_map[unit] = oldidx; 753 if (!found && newinfo->fbops->fb_release) 754 newinfo->fbops->fb_release(newinfo, 0); 755 if (!found) 756 module_put(newinfo->fbops->owner); 757 err = -ENODEV; 758 } 759 760 if (!err) { 761 fbcon_del_cursor_timer(oldinfo); 762 kfree(ops->cursor_state.mask); 763 kfree(ops->cursor_data); 764 kfree(ops->cursor_src); 765 kfree(ops->fontbuffer); 766 kfree(oldinfo->fbcon_par); 767 oldinfo->fbcon_par = NULL; 768 module_put(oldinfo->fbops->owner); 769 /* 770 If oldinfo and newinfo are driving the same hardware, 771 the fb_release() method of oldinfo may attempt to 772 restore the hardware state. This will leave the 773 newinfo in an undefined state. Thus, a call to 774 fb_set_par() may be needed for the newinfo. 775 */ 776 if (newinfo && newinfo->fbops->fb_set_par) { 777 ret = newinfo->fbops->fb_set_par(newinfo); 778 779 if (ret) 780 printk(KERN_ERR "con2fb_release_oldinfo: " 781 "detected unhandled fb_set_par error, " 782 "error code %d\n", ret); 783 } 784 } 785 786 return err; 787 } 788 789 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info, 790 int unit, int show_logo) 791 { 792 struct fbcon_ops *ops = info->fbcon_par; 793 int ret; 794 795 ops->currcon = fg_console; 796 797 if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT)) { 798 ret = info->fbops->fb_set_par(info); 799 800 if (ret) 801 printk(KERN_ERR "con2fb_init_display: detected " 802 "unhandled fb_set_par error, " 803 "error code %d\n", ret); 804 } 805 806 ops->flags |= FBCON_FLAGS_INIT; 807 ops->graphics = 0; 808 fbcon_set_disp(info, &info->var, unit); 809 810 if (show_logo) { 811 struct vc_data *fg_vc = vc_cons[fg_console].d; 812 struct fb_info *fg_info = 813 registered_fb[con2fb_map[fg_console]]; 814 815 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols, 816 fg_vc->vc_rows, fg_vc->vc_cols, 817 fg_vc->vc_rows); 818 } 819 820 update_screen(vc_cons[fg_console].d); 821 } 822 823 /** 824 * set_con2fb_map - map console to frame buffer device 825 * @unit: virtual console number to map 826 * @newidx: frame buffer index to map virtual console to 827 * @user: user request 828 * 829 * Maps a virtual console @unit to a frame buffer device 830 * @newidx. 831 * 832 * This should be called with the console lock held. 833 */ 834 static int set_con2fb_map(int unit, int newidx, int user) 835 { 836 struct vc_data *vc = vc_cons[unit].d; 837 int oldidx = con2fb_map[unit]; 838 struct fb_info *info = registered_fb[newidx]; 839 struct fb_info *oldinfo = NULL; 840 int found, err = 0; 841 842 WARN_CONSOLE_UNLOCKED(); 843 844 if (oldidx == newidx) 845 return 0; 846 847 if (!info) 848 return -EINVAL; 849 850 if (!search_for_mapped_con() || !con_is_bound(&fb_con)) { 851 info_idx = newidx; 852 return do_fbcon_takeover(0); 853 } 854 855 if (oldidx != -1) 856 oldinfo = registered_fb[oldidx]; 857 858 found = search_fb_in_map(newidx); 859 860 con2fb_map[unit] = newidx; 861 if (!err && !found) 862 err = con2fb_acquire_newinfo(vc, info, unit, oldidx); 863 864 /* 865 * If old fb is not mapped to any of the consoles, 866 * fbcon should release it. 867 */ 868 if (!err && oldinfo && !search_fb_in_map(oldidx)) 869 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx, 870 found); 871 872 if (!err) { 873 int show_logo = (fg_console == 0 && !user && 874 logo_shown != FBCON_LOGO_DONTSHOW); 875 876 if (!found) 877 fbcon_add_cursor_timer(info); 878 con2fb_map_boot[unit] = newidx; 879 con2fb_init_display(vc, info, unit, show_logo); 880 } 881 882 if (!search_fb_in_map(info_idx)) 883 info_idx = newidx; 884 885 return err; 886 } 887 888 /* 889 * Low Level Operations 890 */ 891 /* NOTE: fbcon cannot be __init: it may be called from do_take_over_console later */ 892 static int var_to_display(struct fbcon_display *disp, 893 struct fb_var_screeninfo *var, 894 struct fb_info *info) 895 { 896 disp->xres_virtual = var->xres_virtual; 897 disp->yres_virtual = var->yres_virtual; 898 disp->bits_per_pixel = var->bits_per_pixel; 899 disp->grayscale = var->grayscale; 900 disp->nonstd = var->nonstd; 901 disp->accel_flags = var->accel_flags; 902 disp->height = var->height; 903 disp->width = var->width; 904 disp->red = var->red; 905 disp->green = var->green; 906 disp->blue = var->blue; 907 disp->transp = var->transp; 908 disp->rotate = var->rotate; 909 disp->mode = fb_match_mode(var, &info->modelist); 910 if (disp->mode == NULL) 911 /* This should not happen */ 912 return -EINVAL; 913 return 0; 914 } 915 916 static void display_to_var(struct fb_var_screeninfo *var, 917 struct fbcon_display *disp) 918 { 919 fb_videomode_to_var(var, disp->mode); 920 var->xres_virtual = disp->xres_virtual; 921 var->yres_virtual = disp->yres_virtual; 922 var->bits_per_pixel = disp->bits_per_pixel; 923 var->grayscale = disp->grayscale; 924 var->nonstd = disp->nonstd; 925 var->accel_flags = disp->accel_flags; 926 var->height = disp->height; 927 var->width = disp->width; 928 var->red = disp->red; 929 var->green = disp->green; 930 var->blue = disp->blue; 931 var->transp = disp->transp; 932 var->rotate = disp->rotate; 933 } 934 935 static const char *fbcon_startup(void) 936 { 937 const char *display_desc = "frame buffer device"; 938 struct fbcon_display *p = &fb_display[fg_console]; 939 struct vc_data *vc = vc_cons[fg_console].d; 940 const struct font_desc *font = NULL; 941 struct module *owner; 942 struct fb_info *info = NULL; 943 struct fbcon_ops *ops; 944 int rows, cols; 945 946 /* 947 * If num_registered_fb is zero, this is a call for the dummy part. 948 * The frame buffer devices weren't initialized yet. 949 */ 950 if (!num_registered_fb || info_idx == -1) 951 return display_desc; 952 /* 953 * Instead of blindly using registered_fb[0], we use info_idx, set by 954 * fb_console_init(); 955 */ 956 info = registered_fb[info_idx]; 957 if (!info) 958 return NULL; 959 960 owner = info->fbops->owner; 961 if (!try_module_get(owner)) 962 return NULL; 963 if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) { 964 module_put(owner); 965 return NULL; 966 } 967 968 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL); 969 if (!ops) { 970 module_put(owner); 971 return NULL; 972 } 973 974 ops->currcon = -1; 975 ops->graphics = 1; 976 ops->cur_rotate = -1; 977 ops->cur_blink_jiffies = HZ / 5; 978 ops->info = info; 979 info->fbcon_par = ops; 980 981 p->con_rotate = initial_rotation; 982 if (p->con_rotate == -1) 983 p->con_rotate = info->fbcon_rotate_hint; 984 if (p->con_rotate == -1) 985 p->con_rotate = FB_ROTATE_UR; 986 987 set_blitting_type(vc, info); 988 989 /* Setup default font */ 990 if (!p->fontdata && !vc->vc_font.data) { 991 if (!fontname[0] || !(font = find_font(fontname))) 992 font = get_default_font(info->var.xres, 993 info->var.yres, 994 info->pixmap.blit_x, 995 info->pixmap.blit_y); 996 vc->vc_font.width = font->width; 997 vc->vc_font.height = font->height; 998 vc->vc_font.data = (void *)(p->fontdata = font->data); 999 vc->vc_font.charcount = font->charcount; 1000 } else { 1001 p->fontdata = vc->vc_font.data; 1002 } 1003 1004 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 1005 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 1006 cols /= vc->vc_font.width; 1007 rows /= vc->vc_font.height; 1008 vc_resize(vc, cols, rows); 1009 1010 pr_debug("mode: %s\n", info->fix.id); 1011 pr_debug("visual: %d\n", info->fix.visual); 1012 pr_debug("res: %dx%d-%d\n", info->var.xres, 1013 info->var.yres, 1014 info->var.bits_per_pixel); 1015 1016 fbcon_add_cursor_timer(info); 1017 return display_desc; 1018 } 1019 1020 static void fbcon_init(struct vc_data *vc, int init) 1021 { 1022 struct fb_info *info; 1023 struct fbcon_ops *ops; 1024 struct vc_data **default_mode = vc->vc_display_fg; 1025 struct vc_data *svc = *default_mode; 1026 struct fbcon_display *t, *p = &fb_display[vc->vc_num]; 1027 int logo = 1, new_rows, new_cols, rows, cols; 1028 int ret; 1029 1030 if (WARN_ON(info_idx == -1)) 1031 return; 1032 1033 if (con2fb_map[vc->vc_num] == -1) 1034 con2fb_map[vc->vc_num] = info_idx; 1035 1036 info = registered_fb[con2fb_map[vc->vc_num]]; 1037 1038 if (logo_shown < 0 && console_loglevel <= CONSOLE_LOGLEVEL_QUIET) 1039 logo_shown = FBCON_LOGO_DONTSHOW; 1040 1041 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW || 1042 (info->fix.type == FB_TYPE_TEXT)) 1043 logo = 0; 1044 1045 if (var_to_display(p, &info->var, info)) 1046 return; 1047 1048 if (!info->fbcon_par) 1049 con2fb_acquire_newinfo(vc, info, vc->vc_num, -1); 1050 1051 /* If we are not the first console on this 1052 fb, copy the font from that console */ 1053 t = &fb_display[fg_console]; 1054 if (!p->fontdata) { 1055 if (t->fontdata) { 1056 struct vc_data *fvc = vc_cons[fg_console].d; 1057 1058 vc->vc_font.data = (void *)(p->fontdata = 1059 fvc->vc_font.data); 1060 vc->vc_font.width = fvc->vc_font.width; 1061 vc->vc_font.height = fvc->vc_font.height; 1062 vc->vc_font.charcount = fvc->vc_font.charcount; 1063 p->userfont = t->userfont; 1064 1065 if (p->userfont) 1066 REFCOUNT(p->fontdata)++; 1067 } else { 1068 const struct font_desc *font = NULL; 1069 1070 if (!fontname[0] || !(font = find_font(fontname))) 1071 font = get_default_font(info->var.xres, 1072 info->var.yres, 1073 info->pixmap.blit_x, 1074 info->pixmap.blit_y); 1075 vc->vc_font.width = font->width; 1076 vc->vc_font.height = font->height; 1077 vc->vc_font.data = (void *)(p->fontdata = font->data); 1078 vc->vc_font.charcount = font->charcount; 1079 } 1080 } 1081 1082 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1); 1083 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 1084 if (vc->vc_font.charcount == 256) { 1085 vc->vc_hi_font_mask = 0; 1086 } else { 1087 vc->vc_hi_font_mask = 0x100; 1088 if (vc->vc_can_do_color) 1089 vc->vc_complement_mask <<= 1; 1090 } 1091 1092 if (!*svc->vc_uni_pagedir_loc) 1093 con_set_default_unimap(svc); 1094 if (!*vc->vc_uni_pagedir_loc) 1095 con_copy_unimap(vc, svc); 1096 1097 ops = info->fbcon_par; 1098 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms); 1099 1100 p->con_rotate = initial_rotation; 1101 if (p->con_rotate == -1) 1102 p->con_rotate = info->fbcon_rotate_hint; 1103 if (p->con_rotate == -1) 1104 p->con_rotate = FB_ROTATE_UR; 1105 1106 set_blitting_type(vc, info); 1107 1108 cols = vc->vc_cols; 1109 rows = vc->vc_rows; 1110 new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 1111 new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 1112 new_cols /= vc->vc_font.width; 1113 new_rows /= vc->vc_font.height; 1114 1115 /* 1116 * We must always set the mode. The mode of the previous console 1117 * driver could be in the same resolution but we are using different 1118 * hardware so we have to initialize the hardware. 1119 * 1120 * We need to do it in fbcon_init() to prevent screen corruption. 1121 */ 1122 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) { 1123 if (info->fbops->fb_set_par && 1124 !(ops->flags & FBCON_FLAGS_INIT)) { 1125 ret = info->fbops->fb_set_par(info); 1126 1127 if (ret) 1128 printk(KERN_ERR "fbcon_init: detected " 1129 "unhandled fb_set_par error, " 1130 "error code %d\n", ret); 1131 } 1132 1133 ops->flags |= FBCON_FLAGS_INIT; 1134 } 1135 1136 ops->graphics = 0; 1137 1138 /* 1139 * No more hw acceleration for fbcon. 1140 * 1141 * FIXME: Garbage collect all the now dead code after sufficient time 1142 * has passed. 1143 */ 1144 p->scrollmode = SCROLL_REDRAW; 1145 1146 /* 1147 * ++guenther: console.c:vc_allocate() relies on initializing 1148 * vc_{cols,rows}, but we must not set those if we are only 1149 * resizing the console. 1150 */ 1151 if (init) { 1152 vc->vc_cols = new_cols; 1153 vc->vc_rows = new_rows; 1154 } else 1155 vc_resize(vc, new_cols, new_rows); 1156 1157 if (logo) 1158 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows); 1159 1160 if (ops->rotate_font && ops->rotate_font(info, vc)) { 1161 ops->rotate = FB_ROTATE_UR; 1162 set_blitting_type(vc, info); 1163 } 1164 1165 ops->p = &fb_display[fg_console]; 1166 } 1167 1168 static void fbcon_free_font(struct fbcon_display *p, bool freefont) 1169 { 1170 if (freefont && p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0)) 1171 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int)); 1172 p->fontdata = NULL; 1173 p->userfont = 0; 1174 } 1175 1176 static void set_vc_hi_font(struct vc_data *vc, bool set); 1177 1178 static void fbcon_deinit(struct vc_data *vc) 1179 { 1180 struct fbcon_display *p = &fb_display[vc->vc_num]; 1181 struct fb_info *info; 1182 struct fbcon_ops *ops; 1183 int idx; 1184 bool free_font = true; 1185 1186 idx = con2fb_map[vc->vc_num]; 1187 1188 if (idx == -1) 1189 goto finished; 1190 1191 info = registered_fb[idx]; 1192 1193 if (!info) 1194 goto finished; 1195 1196 if (info->flags & FBINFO_MISC_FIRMWARE) 1197 free_font = false; 1198 ops = info->fbcon_par; 1199 1200 if (!ops) 1201 goto finished; 1202 1203 if (con_is_visible(vc)) 1204 fbcon_del_cursor_timer(info); 1205 1206 ops->flags &= ~FBCON_FLAGS_INIT; 1207 finished: 1208 1209 fbcon_free_font(p, free_font); 1210 if (free_font) 1211 vc->vc_font.data = NULL; 1212 1213 if (vc->vc_hi_font_mask && vc->vc_screenbuf) 1214 set_vc_hi_font(vc, false); 1215 1216 if (!con_is_bound(&fb_con)) 1217 fbcon_exit(); 1218 1219 if (vc->vc_num == logo_shown) 1220 logo_shown = FBCON_LOGO_CANSHOW; 1221 1222 return; 1223 } 1224 1225 /* ====================================================================== */ 1226 1227 /* fbcon_XXX routines - interface used by the world 1228 * 1229 * This system is now divided into two levels because of complications 1230 * caused by hardware scrolling. Top level functions: 1231 * 1232 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins() 1233 * 1234 * handles y values in range [0, scr_height-1] that correspond to real 1235 * screen positions. y_wrap shift means that first line of bitmap may be 1236 * anywhere on this display. These functions convert lineoffsets to 1237 * bitmap offsets and deal with the wrap-around case by splitting blits. 1238 * 1239 * fbcon_bmove_physical_8() -- These functions fast implementations 1240 * fbcon_clear_physical_8() -- of original fbcon_XXX fns. 1241 * fbcon_putc_physical_8() -- (font width != 8) may be added later 1242 * 1243 * WARNING: 1244 * 1245 * At the moment fbcon_putc() cannot blit across vertical wrap boundary 1246 * Implies should only really hardware scroll in rows. Only reason for 1247 * restriction is simplicity & efficiency at the moment. 1248 */ 1249 1250 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height, 1251 int width) 1252 { 1253 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1254 struct fbcon_ops *ops = info->fbcon_par; 1255 1256 struct fbcon_display *p = &fb_display[vc->vc_num]; 1257 u_int y_break; 1258 1259 if (fbcon_is_inactive(vc, info)) 1260 return; 1261 1262 if (!height || !width) 1263 return; 1264 1265 if (sy < vc->vc_top && vc->vc_top == logo_lines) { 1266 vc->vc_top = 0; 1267 /* 1268 * If the font dimensions are not an integral of the display 1269 * dimensions then the ops->clear below won't end up clearing 1270 * the margins. Call clear_margins here in case the logo 1271 * bitmap stretched into the margin area. 1272 */ 1273 fbcon_clear_margins(vc, 0); 1274 } 1275 1276 /* Split blits that cross physical y_wrap boundary */ 1277 1278 y_break = p->vrows - p->yscroll; 1279 if (sy < y_break && sy + height - 1 >= y_break) { 1280 u_int b = y_break - sy; 1281 ops->clear(vc, info, real_y(p, sy), sx, b, width); 1282 ops->clear(vc, info, real_y(p, sy + b), sx, height - b, 1283 width); 1284 } else 1285 ops->clear(vc, info, real_y(p, sy), sx, height, width); 1286 } 1287 1288 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s, 1289 int count, int ypos, int xpos) 1290 { 1291 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1292 struct fbcon_display *p = &fb_display[vc->vc_num]; 1293 struct fbcon_ops *ops = info->fbcon_par; 1294 1295 if (!fbcon_is_inactive(vc, info)) 1296 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos, 1297 get_color(vc, info, scr_readw(s), 1), 1298 get_color(vc, info, scr_readw(s), 0)); 1299 } 1300 1301 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos) 1302 { 1303 unsigned short chr; 1304 1305 scr_writew(c, &chr); 1306 fbcon_putcs(vc, &chr, 1, ypos, xpos); 1307 } 1308 1309 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only) 1310 { 1311 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1312 struct fbcon_ops *ops = info->fbcon_par; 1313 1314 if (!fbcon_is_inactive(vc, info)) 1315 ops->clear_margins(vc, info, margin_color, bottom_only); 1316 } 1317 1318 static void fbcon_cursor(struct vc_data *vc, int mode) 1319 { 1320 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1321 struct fbcon_ops *ops = info->fbcon_par; 1322 int c = scr_readw((u16 *) vc->vc_pos); 1323 1324 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms); 1325 1326 if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1) 1327 return; 1328 1329 if (vc->vc_cursor_type & CUR_SW) 1330 fbcon_del_cursor_timer(info); 1331 else 1332 fbcon_add_cursor_timer(info); 1333 1334 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1; 1335 1336 ops->cursor(vc, info, mode, get_color(vc, info, c, 1), 1337 get_color(vc, info, c, 0)); 1338 } 1339 1340 static int scrollback_phys_max = 0; 1341 static int scrollback_max = 0; 1342 static int scrollback_current = 0; 1343 1344 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var, 1345 int unit) 1346 { 1347 struct fbcon_display *p, *t; 1348 struct vc_data **default_mode, *vc; 1349 struct vc_data *svc; 1350 struct fbcon_ops *ops = info->fbcon_par; 1351 int rows, cols; 1352 1353 p = &fb_display[unit]; 1354 1355 if (var_to_display(p, var, info)) 1356 return; 1357 1358 vc = vc_cons[unit].d; 1359 1360 if (!vc) 1361 return; 1362 1363 default_mode = vc->vc_display_fg; 1364 svc = *default_mode; 1365 t = &fb_display[svc->vc_num]; 1366 1367 if (!vc->vc_font.data) { 1368 vc->vc_font.data = (void *)(p->fontdata = t->fontdata); 1369 vc->vc_font.width = (*default_mode)->vc_font.width; 1370 vc->vc_font.height = (*default_mode)->vc_font.height; 1371 vc->vc_font.charcount = (*default_mode)->vc_font.charcount; 1372 p->userfont = t->userfont; 1373 if (p->userfont) 1374 REFCOUNT(p->fontdata)++; 1375 } 1376 1377 var->activate = FB_ACTIVATE_NOW; 1378 info->var.activate = var->activate; 1379 var->yoffset = info->var.yoffset; 1380 var->xoffset = info->var.xoffset; 1381 fb_set_var(info, var); 1382 ops->var = info->var; 1383 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1); 1384 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 1385 if (vc->vc_font.charcount == 256) { 1386 vc->vc_hi_font_mask = 0; 1387 } else { 1388 vc->vc_hi_font_mask = 0x100; 1389 if (vc->vc_can_do_color) 1390 vc->vc_complement_mask <<= 1; 1391 } 1392 1393 if (!*svc->vc_uni_pagedir_loc) 1394 con_set_default_unimap(svc); 1395 if (!*vc->vc_uni_pagedir_loc) 1396 con_copy_unimap(vc, svc); 1397 1398 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 1399 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 1400 cols /= vc->vc_font.width; 1401 rows /= vc->vc_font.height; 1402 vc_resize(vc, cols, rows); 1403 1404 if (con_is_visible(vc)) { 1405 update_screen(vc); 1406 } 1407 } 1408 1409 static __inline__ void ywrap_up(struct vc_data *vc, int count) 1410 { 1411 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1412 struct fbcon_ops *ops = info->fbcon_par; 1413 struct fbcon_display *p = &fb_display[vc->vc_num]; 1414 1415 p->yscroll += count; 1416 if (p->yscroll >= p->vrows) /* Deal with wrap */ 1417 p->yscroll -= p->vrows; 1418 ops->var.xoffset = 0; 1419 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1420 ops->var.vmode |= FB_VMODE_YWRAP; 1421 ops->update_start(info); 1422 scrollback_max += count; 1423 if (scrollback_max > scrollback_phys_max) 1424 scrollback_max = scrollback_phys_max; 1425 scrollback_current = 0; 1426 } 1427 1428 static __inline__ void ywrap_down(struct vc_data *vc, int count) 1429 { 1430 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1431 struct fbcon_ops *ops = info->fbcon_par; 1432 struct fbcon_display *p = &fb_display[vc->vc_num]; 1433 1434 p->yscroll -= count; 1435 if (p->yscroll < 0) /* Deal with wrap */ 1436 p->yscroll += p->vrows; 1437 ops->var.xoffset = 0; 1438 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1439 ops->var.vmode |= FB_VMODE_YWRAP; 1440 ops->update_start(info); 1441 scrollback_max -= count; 1442 if (scrollback_max < 0) 1443 scrollback_max = 0; 1444 scrollback_current = 0; 1445 } 1446 1447 static __inline__ void ypan_up(struct vc_data *vc, int count) 1448 { 1449 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1450 struct fbcon_display *p = &fb_display[vc->vc_num]; 1451 struct fbcon_ops *ops = info->fbcon_par; 1452 1453 p->yscroll += count; 1454 if (p->yscroll > p->vrows - vc->vc_rows) { 1455 ops->bmove(vc, info, p->vrows - vc->vc_rows, 1456 0, 0, 0, vc->vc_rows, vc->vc_cols); 1457 p->yscroll -= p->vrows - vc->vc_rows; 1458 } 1459 1460 ops->var.xoffset = 0; 1461 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1462 ops->var.vmode &= ~FB_VMODE_YWRAP; 1463 ops->update_start(info); 1464 fbcon_clear_margins(vc, 1); 1465 scrollback_max += count; 1466 if (scrollback_max > scrollback_phys_max) 1467 scrollback_max = scrollback_phys_max; 1468 scrollback_current = 0; 1469 } 1470 1471 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count) 1472 { 1473 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1474 struct fbcon_ops *ops = info->fbcon_par; 1475 struct fbcon_display *p = &fb_display[vc->vc_num]; 1476 1477 p->yscroll += count; 1478 1479 if (p->yscroll > p->vrows - vc->vc_rows) { 1480 p->yscroll -= p->vrows - vc->vc_rows; 1481 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t); 1482 } 1483 1484 ops->var.xoffset = 0; 1485 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1486 ops->var.vmode &= ~FB_VMODE_YWRAP; 1487 ops->update_start(info); 1488 fbcon_clear_margins(vc, 1); 1489 scrollback_max += count; 1490 if (scrollback_max > scrollback_phys_max) 1491 scrollback_max = scrollback_phys_max; 1492 scrollback_current = 0; 1493 } 1494 1495 static __inline__ void ypan_down(struct vc_data *vc, int count) 1496 { 1497 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1498 struct fbcon_display *p = &fb_display[vc->vc_num]; 1499 struct fbcon_ops *ops = info->fbcon_par; 1500 1501 p->yscroll -= count; 1502 if (p->yscroll < 0) { 1503 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows, 1504 0, vc->vc_rows, vc->vc_cols); 1505 p->yscroll += p->vrows - vc->vc_rows; 1506 } 1507 1508 ops->var.xoffset = 0; 1509 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1510 ops->var.vmode &= ~FB_VMODE_YWRAP; 1511 ops->update_start(info); 1512 fbcon_clear_margins(vc, 1); 1513 scrollback_max -= count; 1514 if (scrollback_max < 0) 1515 scrollback_max = 0; 1516 scrollback_current = 0; 1517 } 1518 1519 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count) 1520 { 1521 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1522 struct fbcon_ops *ops = info->fbcon_par; 1523 struct fbcon_display *p = &fb_display[vc->vc_num]; 1524 1525 p->yscroll -= count; 1526 1527 if (p->yscroll < 0) { 1528 p->yscroll += p->vrows - vc->vc_rows; 1529 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count); 1530 } 1531 1532 ops->var.xoffset = 0; 1533 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1534 ops->var.vmode &= ~FB_VMODE_YWRAP; 1535 ops->update_start(info); 1536 fbcon_clear_margins(vc, 1); 1537 scrollback_max -= count; 1538 if (scrollback_max < 0) 1539 scrollback_max = 0; 1540 scrollback_current = 0; 1541 } 1542 1543 static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p, 1544 int line, int count, int dy) 1545 { 1546 unsigned short *s = (unsigned short *) 1547 (vc->vc_origin + vc->vc_size_row * line); 1548 1549 while (count--) { 1550 unsigned short *start = s; 1551 unsigned short *le = advance_row(s, 1); 1552 unsigned short c; 1553 int x = 0; 1554 unsigned short attr = 1; 1555 1556 do { 1557 c = scr_readw(s); 1558 if (attr != (c & 0xff00)) { 1559 attr = c & 0xff00; 1560 if (s > start) { 1561 fbcon_putcs(vc, start, s - start, 1562 dy, x); 1563 x += s - start; 1564 start = s; 1565 } 1566 } 1567 console_conditional_schedule(); 1568 s++; 1569 } while (s < le); 1570 if (s > start) 1571 fbcon_putcs(vc, start, s - start, dy, x); 1572 console_conditional_schedule(); 1573 dy++; 1574 } 1575 } 1576 1577 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info, 1578 struct fbcon_display *p, int line, int count, int ycount) 1579 { 1580 int offset = ycount * vc->vc_cols; 1581 unsigned short *d = (unsigned short *) 1582 (vc->vc_origin + vc->vc_size_row * line); 1583 unsigned short *s = d + offset; 1584 struct fbcon_ops *ops = info->fbcon_par; 1585 1586 while (count--) { 1587 unsigned short *start = s; 1588 unsigned short *le = advance_row(s, 1); 1589 unsigned short c; 1590 int x = 0; 1591 1592 do { 1593 c = scr_readw(s); 1594 1595 if (c == scr_readw(d)) { 1596 if (s > start) { 1597 ops->bmove(vc, info, line + ycount, x, 1598 line, x, 1, s-start); 1599 x += s - start + 1; 1600 start = s + 1; 1601 } else { 1602 x++; 1603 start++; 1604 } 1605 } 1606 1607 scr_writew(c, d); 1608 console_conditional_schedule(); 1609 s++; 1610 d++; 1611 } while (s < le); 1612 if (s > start) 1613 ops->bmove(vc, info, line + ycount, x, line, x, 1, 1614 s-start); 1615 console_conditional_schedule(); 1616 if (ycount > 0) 1617 line++; 1618 else { 1619 line--; 1620 /* NOTE: We subtract two lines from these pointers */ 1621 s -= vc->vc_size_row; 1622 d -= vc->vc_size_row; 1623 } 1624 } 1625 } 1626 1627 static void fbcon_redraw(struct vc_data *vc, struct fbcon_display *p, 1628 int line, int count, int offset) 1629 { 1630 unsigned short *d = (unsigned short *) 1631 (vc->vc_origin + vc->vc_size_row * line); 1632 unsigned short *s = d + offset; 1633 1634 while (count--) { 1635 unsigned short *start = s; 1636 unsigned short *le = advance_row(s, 1); 1637 unsigned short c; 1638 int x = 0; 1639 unsigned short attr = 1; 1640 1641 do { 1642 c = scr_readw(s); 1643 if (attr != (c & 0xff00)) { 1644 attr = c & 0xff00; 1645 if (s > start) { 1646 fbcon_putcs(vc, start, s - start, 1647 line, x); 1648 x += s - start; 1649 start = s; 1650 } 1651 } 1652 if (c == scr_readw(d)) { 1653 if (s > start) { 1654 fbcon_putcs(vc, start, s - start, 1655 line, x); 1656 x += s - start + 1; 1657 start = s + 1; 1658 } else { 1659 x++; 1660 start++; 1661 } 1662 } 1663 scr_writew(c, d); 1664 console_conditional_schedule(); 1665 s++; 1666 d++; 1667 } while (s < le); 1668 if (s > start) 1669 fbcon_putcs(vc, start, s - start, line, x); 1670 console_conditional_schedule(); 1671 if (offset > 0) 1672 line++; 1673 else { 1674 line--; 1675 /* NOTE: We subtract two lines from these pointers */ 1676 s -= vc->vc_size_row; 1677 d -= vc->vc_size_row; 1678 } 1679 } 1680 } 1681 1682 static bool fbcon_scroll(struct vc_data *vc, unsigned int t, unsigned int b, 1683 enum con_scroll dir, unsigned int count) 1684 { 1685 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1686 struct fbcon_display *p = &fb_display[vc->vc_num]; 1687 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK; 1688 1689 if (fbcon_is_inactive(vc, info)) 1690 return true; 1691 1692 fbcon_cursor(vc, CM_ERASE); 1693 1694 /* 1695 * ++Geert: Only use ywrap/ypan if the console is in text mode 1696 * ++Andrew: Only use ypan on hardware text mode when scrolling the 1697 * whole screen (prevents flicker). 1698 */ 1699 1700 switch (dir) { 1701 case SM_UP: 1702 if (count > vc->vc_rows) /* Maximum realistic size */ 1703 count = vc->vc_rows; 1704 if (logo_shown >= 0) 1705 goto redraw_up; 1706 switch (p->scrollmode) { 1707 case SCROLL_MOVE: 1708 fbcon_redraw_blit(vc, info, p, t, b - t - count, 1709 count); 1710 fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1711 scr_memsetw((unsigned short *) (vc->vc_origin + 1712 vc->vc_size_row * 1713 (b - count)), 1714 vc->vc_video_erase_char, 1715 vc->vc_size_row * count); 1716 return true; 1717 1718 case SCROLL_WRAP_MOVE: 1719 if (b - t - count > 3 * vc->vc_rows >> 2) { 1720 if (t > 0) 1721 fbcon_bmove(vc, 0, 0, count, 0, t, 1722 vc->vc_cols); 1723 ywrap_up(vc, count); 1724 if (vc->vc_rows - b > 0) 1725 fbcon_bmove(vc, b - count, 0, b, 0, 1726 vc->vc_rows - b, 1727 vc->vc_cols); 1728 } else if (info->flags & FBINFO_READS_FAST) 1729 fbcon_bmove(vc, t + count, 0, t, 0, 1730 b - t - count, vc->vc_cols); 1731 else 1732 goto redraw_up; 1733 fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1734 break; 1735 1736 case SCROLL_PAN_REDRAW: 1737 if ((p->yscroll + count <= 1738 2 * (p->vrows - vc->vc_rows)) 1739 && ((!scroll_partial && (b - t == vc->vc_rows)) 1740 || (scroll_partial 1741 && (b - t - count > 1742 3 * vc->vc_rows >> 2)))) { 1743 if (t > 0) 1744 fbcon_redraw_move(vc, p, 0, t, count); 1745 ypan_up_redraw(vc, t, count); 1746 if (vc->vc_rows - b > 0) 1747 fbcon_redraw_move(vc, p, b, 1748 vc->vc_rows - b, b); 1749 } else 1750 fbcon_redraw_move(vc, p, t + count, b - t - count, t); 1751 fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1752 break; 1753 1754 case SCROLL_PAN_MOVE: 1755 if ((p->yscroll + count <= 1756 2 * (p->vrows - vc->vc_rows)) 1757 && ((!scroll_partial && (b - t == vc->vc_rows)) 1758 || (scroll_partial 1759 && (b - t - count > 1760 3 * vc->vc_rows >> 2)))) { 1761 if (t > 0) 1762 fbcon_bmove(vc, 0, 0, count, 0, t, 1763 vc->vc_cols); 1764 ypan_up(vc, count); 1765 if (vc->vc_rows - b > 0) 1766 fbcon_bmove(vc, b - count, 0, b, 0, 1767 vc->vc_rows - b, 1768 vc->vc_cols); 1769 } else if (info->flags & FBINFO_READS_FAST) 1770 fbcon_bmove(vc, t + count, 0, t, 0, 1771 b - t - count, vc->vc_cols); 1772 else 1773 goto redraw_up; 1774 fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1775 break; 1776 1777 case SCROLL_REDRAW: 1778 redraw_up: 1779 fbcon_redraw(vc, p, t, b - t - count, 1780 count * vc->vc_cols); 1781 fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1782 scr_memsetw((unsigned short *) (vc->vc_origin + 1783 vc->vc_size_row * 1784 (b - count)), 1785 vc->vc_video_erase_char, 1786 vc->vc_size_row * count); 1787 return true; 1788 } 1789 break; 1790 1791 case SM_DOWN: 1792 if (count > vc->vc_rows) /* Maximum realistic size */ 1793 count = vc->vc_rows; 1794 if (logo_shown >= 0) 1795 goto redraw_down; 1796 switch (p->scrollmode) { 1797 case SCROLL_MOVE: 1798 fbcon_redraw_blit(vc, info, p, b - 1, b - t - count, 1799 -count); 1800 fbcon_clear(vc, t, 0, count, vc->vc_cols); 1801 scr_memsetw((unsigned short *) (vc->vc_origin + 1802 vc->vc_size_row * 1803 t), 1804 vc->vc_video_erase_char, 1805 vc->vc_size_row * count); 1806 return true; 1807 1808 case SCROLL_WRAP_MOVE: 1809 if (b - t - count > 3 * vc->vc_rows >> 2) { 1810 if (vc->vc_rows - b > 0) 1811 fbcon_bmove(vc, b, 0, b - count, 0, 1812 vc->vc_rows - b, 1813 vc->vc_cols); 1814 ywrap_down(vc, count); 1815 if (t > 0) 1816 fbcon_bmove(vc, count, 0, 0, 0, t, 1817 vc->vc_cols); 1818 } else if (info->flags & FBINFO_READS_FAST) 1819 fbcon_bmove(vc, t, 0, t + count, 0, 1820 b - t - count, vc->vc_cols); 1821 else 1822 goto redraw_down; 1823 fbcon_clear(vc, t, 0, count, vc->vc_cols); 1824 break; 1825 1826 case SCROLL_PAN_MOVE: 1827 if ((count - p->yscroll <= p->vrows - vc->vc_rows) 1828 && ((!scroll_partial && (b - t == vc->vc_rows)) 1829 || (scroll_partial 1830 && (b - t - count > 1831 3 * vc->vc_rows >> 2)))) { 1832 if (vc->vc_rows - b > 0) 1833 fbcon_bmove(vc, b, 0, b - count, 0, 1834 vc->vc_rows - b, 1835 vc->vc_cols); 1836 ypan_down(vc, count); 1837 if (t > 0) 1838 fbcon_bmove(vc, count, 0, 0, 0, t, 1839 vc->vc_cols); 1840 } else if (info->flags & FBINFO_READS_FAST) 1841 fbcon_bmove(vc, t, 0, t + count, 0, 1842 b - t - count, vc->vc_cols); 1843 else 1844 goto redraw_down; 1845 fbcon_clear(vc, t, 0, count, vc->vc_cols); 1846 break; 1847 1848 case SCROLL_PAN_REDRAW: 1849 if ((count - p->yscroll <= p->vrows - vc->vc_rows) 1850 && ((!scroll_partial && (b - t == vc->vc_rows)) 1851 || (scroll_partial 1852 && (b - t - count > 1853 3 * vc->vc_rows >> 2)))) { 1854 if (vc->vc_rows - b > 0) 1855 fbcon_redraw_move(vc, p, b, vc->vc_rows - b, 1856 b - count); 1857 ypan_down_redraw(vc, t, count); 1858 if (t > 0) 1859 fbcon_redraw_move(vc, p, count, t, 0); 1860 } else 1861 fbcon_redraw_move(vc, p, t, b - t - count, t + count); 1862 fbcon_clear(vc, t, 0, count, vc->vc_cols); 1863 break; 1864 1865 case SCROLL_REDRAW: 1866 redraw_down: 1867 fbcon_redraw(vc, p, b - 1, b - t - count, 1868 -count * vc->vc_cols); 1869 fbcon_clear(vc, t, 0, count, vc->vc_cols); 1870 scr_memsetw((unsigned short *) (vc->vc_origin + 1871 vc->vc_size_row * 1872 t), 1873 vc->vc_video_erase_char, 1874 vc->vc_size_row * count); 1875 return true; 1876 } 1877 } 1878 return false; 1879 } 1880 1881 1882 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx, 1883 int height, int width) 1884 { 1885 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1886 struct fbcon_display *p = &fb_display[vc->vc_num]; 1887 1888 if (fbcon_is_inactive(vc, info)) 1889 return; 1890 1891 if (!width || !height) 1892 return; 1893 1894 /* Split blits that cross physical y_wrap case. 1895 * Pathological case involves 4 blits, better to use recursive 1896 * code rather than unrolled case 1897 * 1898 * Recursive invocations don't need to erase the cursor over and 1899 * over again, so we use fbcon_bmove_rec() 1900 */ 1901 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width, 1902 p->vrows - p->yscroll); 1903 } 1904 1905 static void fbcon_bmove_rec(struct vc_data *vc, struct fbcon_display *p, int sy, int sx, 1906 int dy, int dx, int height, int width, u_int y_break) 1907 { 1908 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1909 struct fbcon_ops *ops = info->fbcon_par; 1910 u_int b; 1911 1912 if (sy < y_break && sy + height > y_break) { 1913 b = y_break - sy; 1914 if (dy < sy) { /* Avoid trashing self */ 1915 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1916 y_break); 1917 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1918 height - b, width, y_break); 1919 } else { 1920 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1921 height - b, width, y_break); 1922 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1923 y_break); 1924 } 1925 return; 1926 } 1927 1928 if (dy < y_break && dy + height > y_break) { 1929 b = y_break - dy; 1930 if (dy < sy) { /* Avoid trashing self */ 1931 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1932 y_break); 1933 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1934 height - b, width, y_break); 1935 } else { 1936 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1937 height - b, width, y_break); 1938 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1939 y_break); 1940 } 1941 return; 1942 } 1943 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx, 1944 height, width); 1945 } 1946 1947 static void updatescrollmode(struct fbcon_display *p, 1948 struct fb_info *info, 1949 struct vc_data *vc) 1950 { 1951 struct fbcon_ops *ops = info->fbcon_par; 1952 int fh = vc->vc_font.height; 1953 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 1954 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual, 1955 info->var.xres_virtual); 1956 1957 p->vrows = vyres/fh; 1958 if (yres > (fh * (vc->vc_rows + 1))) 1959 p->vrows -= (yres - (fh * vc->vc_rows)) / fh; 1960 if ((yres % fh) && (vyres % fh < yres % fh)) 1961 p->vrows--; 1962 } 1963 1964 #define PITCH(w) (((w) + 7) >> 3) 1965 #define CALC_FONTSZ(h, p, c) ((h) * (p) * (c)) /* size = height * pitch * charcount */ 1966 1967 static int fbcon_resize(struct vc_data *vc, unsigned int width, 1968 unsigned int height, unsigned int user) 1969 { 1970 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1971 struct fbcon_ops *ops = info->fbcon_par; 1972 struct fbcon_display *p = &fb_display[vc->vc_num]; 1973 struct fb_var_screeninfo var = info->var; 1974 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh; 1975 1976 if (p->userfont && FNTSIZE(vc->vc_font.data)) { 1977 int size; 1978 int pitch = PITCH(vc->vc_font.width); 1979 1980 /* 1981 * If user font, ensure that a possible change to user font 1982 * height or width will not allow a font data out-of-bounds access. 1983 * NOTE: must use original charcount in calculation as font 1984 * charcount can change and cannot be used to determine the 1985 * font data allocated size. 1986 */ 1987 if (pitch <= 0) 1988 return -EINVAL; 1989 size = CALC_FONTSZ(vc->vc_font.height, pitch, vc->vc_font.charcount); 1990 if (size > FNTSIZE(vc->vc_font.data)) 1991 return -EINVAL; 1992 } 1993 1994 virt_w = FBCON_SWAP(ops->rotate, width, height); 1995 virt_h = FBCON_SWAP(ops->rotate, height, width); 1996 virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width, 1997 vc->vc_font.height); 1998 virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height, 1999 vc->vc_font.width); 2000 var.xres = virt_w * virt_fw; 2001 var.yres = virt_h * virt_fh; 2002 x_diff = info->var.xres - var.xres; 2003 y_diff = info->var.yres - var.yres; 2004 if (x_diff < 0 || x_diff > virt_fw || 2005 y_diff < 0 || y_diff > virt_fh) { 2006 const struct fb_videomode *mode; 2007 2008 pr_debug("attempting resize %ix%i\n", var.xres, var.yres); 2009 mode = fb_find_best_mode(&var, &info->modelist); 2010 if (mode == NULL) 2011 return -EINVAL; 2012 display_to_var(&var, p); 2013 fb_videomode_to_var(&var, mode); 2014 2015 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh) 2016 return -EINVAL; 2017 2018 pr_debug("resize now %ix%i\n", var.xres, var.yres); 2019 if (con_is_visible(vc)) { 2020 var.activate = FB_ACTIVATE_NOW | 2021 FB_ACTIVATE_FORCE; 2022 fb_set_var(info, &var); 2023 } 2024 var_to_display(p, &info->var, info); 2025 ops->var = info->var; 2026 } 2027 updatescrollmode(p, info, vc); 2028 return 0; 2029 } 2030 2031 static int fbcon_switch(struct vc_data *vc) 2032 { 2033 struct fb_info *info, *old_info = NULL; 2034 struct fbcon_ops *ops; 2035 struct fbcon_display *p = &fb_display[vc->vc_num]; 2036 struct fb_var_screeninfo var; 2037 int i, ret, prev_console; 2038 2039 info = registered_fb[con2fb_map[vc->vc_num]]; 2040 ops = info->fbcon_par; 2041 2042 if (logo_shown >= 0) { 2043 struct vc_data *conp2 = vc_cons[logo_shown].d; 2044 2045 if (conp2->vc_top == logo_lines 2046 && conp2->vc_bottom == conp2->vc_rows) 2047 conp2->vc_top = 0; 2048 logo_shown = FBCON_LOGO_CANSHOW; 2049 } 2050 2051 prev_console = ops->currcon; 2052 if (prev_console != -1) 2053 old_info = registered_fb[con2fb_map[prev_console]]; 2054 /* 2055 * FIXME: If we have multiple fbdev's loaded, we need to 2056 * update all info->currcon. Perhaps, we can place this 2057 * in a centralized structure, but this might break some 2058 * drivers. 2059 * 2060 * info->currcon = vc->vc_num; 2061 */ 2062 for_each_registered_fb(i) { 2063 if (registered_fb[i]->fbcon_par) { 2064 struct fbcon_ops *o = registered_fb[i]->fbcon_par; 2065 2066 o->currcon = vc->vc_num; 2067 } 2068 } 2069 memset(&var, 0, sizeof(struct fb_var_screeninfo)); 2070 display_to_var(&var, p); 2071 var.activate = FB_ACTIVATE_NOW; 2072 2073 /* 2074 * make sure we don't unnecessarily trip the memcmp() 2075 * in fb_set_var() 2076 */ 2077 info->var.activate = var.activate; 2078 var.vmode |= info->var.vmode & ~FB_VMODE_MASK; 2079 fb_set_var(info, &var); 2080 ops->var = info->var; 2081 2082 if (old_info != NULL && (old_info != info || 2083 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) { 2084 if (info->fbops->fb_set_par) { 2085 ret = info->fbops->fb_set_par(info); 2086 2087 if (ret) 2088 printk(KERN_ERR "fbcon_switch: detected " 2089 "unhandled fb_set_par error, " 2090 "error code %d\n", ret); 2091 } 2092 2093 if (old_info != info) 2094 fbcon_del_cursor_timer(old_info); 2095 } 2096 2097 if (fbcon_is_inactive(vc, info) || 2098 ops->blank_state != FB_BLANK_UNBLANK) 2099 fbcon_del_cursor_timer(info); 2100 else 2101 fbcon_add_cursor_timer(info); 2102 2103 set_blitting_type(vc, info); 2104 ops->cursor_reset = 1; 2105 2106 if (ops->rotate_font && ops->rotate_font(info, vc)) { 2107 ops->rotate = FB_ROTATE_UR; 2108 set_blitting_type(vc, info); 2109 } 2110 2111 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1); 2112 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 2113 2114 if (vc->vc_font.charcount > 256) 2115 vc->vc_complement_mask <<= 1; 2116 2117 updatescrollmode(p, info, vc); 2118 2119 switch (p->scrollmode) { 2120 case SCROLL_WRAP_MOVE: 2121 scrollback_phys_max = p->vrows - vc->vc_rows; 2122 break; 2123 case SCROLL_PAN_MOVE: 2124 case SCROLL_PAN_REDRAW: 2125 scrollback_phys_max = p->vrows - 2 * vc->vc_rows; 2126 if (scrollback_phys_max < 0) 2127 scrollback_phys_max = 0; 2128 break; 2129 default: 2130 scrollback_phys_max = 0; 2131 break; 2132 } 2133 2134 scrollback_max = 0; 2135 scrollback_current = 0; 2136 2137 if (!fbcon_is_inactive(vc, info)) { 2138 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0; 2139 ops->update_start(info); 2140 } 2141 2142 fbcon_set_palette(vc, color_table); 2143 fbcon_clear_margins(vc, 0); 2144 2145 if (logo_shown == FBCON_LOGO_DRAW) { 2146 2147 logo_shown = fg_console; 2148 /* This is protected above by initmem_freed */ 2149 fb_show_logo(info, ops->rotate); 2150 update_region(vc, 2151 vc->vc_origin + vc->vc_size_row * vc->vc_top, 2152 vc->vc_size_row * (vc->vc_bottom - 2153 vc->vc_top) / 2); 2154 return 0; 2155 } 2156 return 1; 2157 } 2158 2159 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info, 2160 int blank) 2161 { 2162 if (blank) { 2163 unsigned short charmask = vc->vc_hi_font_mask ? 2164 0x1ff : 0xff; 2165 unsigned short oldc; 2166 2167 oldc = vc->vc_video_erase_char; 2168 vc->vc_video_erase_char &= charmask; 2169 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols); 2170 vc->vc_video_erase_char = oldc; 2171 } 2172 } 2173 2174 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch) 2175 { 2176 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 2177 struct fbcon_ops *ops = info->fbcon_par; 2178 2179 if (mode_switch) { 2180 struct fb_var_screeninfo var = info->var; 2181 2182 ops->graphics = 1; 2183 2184 if (!blank) { 2185 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE | 2186 FB_ACTIVATE_KD_TEXT; 2187 fb_set_var(info, &var); 2188 ops->graphics = 0; 2189 ops->var = info->var; 2190 } 2191 } 2192 2193 if (!fbcon_is_inactive(vc, info)) { 2194 if (ops->blank_state != blank) { 2195 ops->blank_state = blank; 2196 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW); 2197 ops->cursor_flash = (!blank); 2198 2199 if (fb_blank(info, blank)) 2200 fbcon_generic_blank(vc, info, blank); 2201 } 2202 2203 if (!blank) 2204 update_screen(vc); 2205 } 2206 2207 if (mode_switch || fbcon_is_inactive(vc, info) || 2208 ops->blank_state != FB_BLANK_UNBLANK) 2209 fbcon_del_cursor_timer(info); 2210 else 2211 fbcon_add_cursor_timer(info); 2212 2213 return 0; 2214 } 2215 2216 static int fbcon_debug_enter(struct vc_data *vc) 2217 { 2218 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 2219 struct fbcon_ops *ops = info->fbcon_par; 2220 2221 ops->save_graphics = ops->graphics; 2222 ops->graphics = 0; 2223 if (info->fbops->fb_debug_enter) 2224 info->fbops->fb_debug_enter(info); 2225 fbcon_set_palette(vc, color_table); 2226 return 0; 2227 } 2228 2229 static int fbcon_debug_leave(struct vc_data *vc) 2230 { 2231 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 2232 struct fbcon_ops *ops = info->fbcon_par; 2233 2234 ops->graphics = ops->save_graphics; 2235 if (info->fbops->fb_debug_leave) 2236 info->fbops->fb_debug_leave(info); 2237 return 0; 2238 } 2239 2240 static int fbcon_get_font(struct vc_data *vc, struct console_font *font) 2241 { 2242 u8 *fontdata = vc->vc_font.data; 2243 u8 *data = font->data; 2244 int i, j; 2245 2246 font->width = vc->vc_font.width; 2247 font->height = vc->vc_font.height; 2248 font->charcount = vc->vc_hi_font_mask ? 512 : 256; 2249 if (!font->data) 2250 return 0; 2251 2252 if (font->width <= 8) { 2253 j = vc->vc_font.height; 2254 if (font->charcount * j > FNTSIZE(fontdata)) 2255 return -EINVAL; 2256 2257 for (i = 0; i < font->charcount; i++) { 2258 memcpy(data, fontdata, j); 2259 memset(data + j, 0, 32 - j); 2260 data += 32; 2261 fontdata += j; 2262 } 2263 } else if (font->width <= 16) { 2264 j = vc->vc_font.height * 2; 2265 if (font->charcount * j > FNTSIZE(fontdata)) 2266 return -EINVAL; 2267 2268 for (i = 0; i < font->charcount; i++) { 2269 memcpy(data, fontdata, j); 2270 memset(data + j, 0, 64 - j); 2271 data += 64; 2272 fontdata += j; 2273 } 2274 } else if (font->width <= 24) { 2275 if (font->charcount * (vc->vc_font.height * sizeof(u32)) > FNTSIZE(fontdata)) 2276 return -EINVAL; 2277 2278 for (i = 0; i < font->charcount; i++) { 2279 for (j = 0; j < vc->vc_font.height; j++) { 2280 *data++ = fontdata[0]; 2281 *data++ = fontdata[1]; 2282 *data++ = fontdata[2]; 2283 fontdata += sizeof(u32); 2284 } 2285 memset(data, 0, 3 * (32 - j)); 2286 data += 3 * (32 - j); 2287 } 2288 } else { 2289 j = vc->vc_font.height * 4; 2290 if (font->charcount * j > FNTSIZE(fontdata)) 2291 return -EINVAL; 2292 2293 for (i = 0; i < font->charcount; i++) { 2294 memcpy(data, fontdata, j); 2295 memset(data + j, 0, 128 - j); 2296 data += 128; 2297 fontdata += j; 2298 } 2299 } 2300 return 0; 2301 } 2302 2303 /* set/clear vc_hi_font_mask and update vc attrs accordingly */ 2304 static void set_vc_hi_font(struct vc_data *vc, bool set) 2305 { 2306 if (!set) { 2307 vc->vc_hi_font_mask = 0; 2308 if (vc->vc_can_do_color) { 2309 vc->vc_complement_mask >>= 1; 2310 vc->vc_s_complement_mask >>= 1; 2311 } 2312 2313 /* ++Edmund: reorder the attribute bits */ 2314 if (vc->vc_can_do_color) { 2315 unsigned short *cp = 2316 (unsigned short *) vc->vc_origin; 2317 int count = vc->vc_screenbuf_size / 2; 2318 unsigned short c; 2319 for (; count > 0; count--, cp++) { 2320 c = scr_readw(cp); 2321 scr_writew(((c & 0xfe00) >> 1) | 2322 (c & 0xff), cp); 2323 } 2324 c = vc->vc_video_erase_char; 2325 vc->vc_video_erase_char = 2326 ((c & 0xfe00) >> 1) | (c & 0xff); 2327 vc->vc_attr >>= 1; 2328 } 2329 } else { 2330 vc->vc_hi_font_mask = 0x100; 2331 if (vc->vc_can_do_color) { 2332 vc->vc_complement_mask <<= 1; 2333 vc->vc_s_complement_mask <<= 1; 2334 } 2335 2336 /* ++Edmund: reorder the attribute bits */ 2337 { 2338 unsigned short *cp = 2339 (unsigned short *) vc->vc_origin; 2340 int count = vc->vc_screenbuf_size / 2; 2341 unsigned short c; 2342 for (; count > 0; count--, cp++) { 2343 unsigned short newc; 2344 c = scr_readw(cp); 2345 if (vc->vc_can_do_color) 2346 newc = 2347 ((c & 0xff00) << 1) | (c & 2348 0xff); 2349 else 2350 newc = c & ~0x100; 2351 scr_writew(newc, cp); 2352 } 2353 c = vc->vc_video_erase_char; 2354 if (vc->vc_can_do_color) { 2355 vc->vc_video_erase_char = 2356 ((c & 0xff00) << 1) | (c & 0xff); 2357 vc->vc_attr <<= 1; 2358 } else 2359 vc->vc_video_erase_char = c & ~0x100; 2360 } 2361 } 2362 } 2363 2364 static int fbcon_do_set_font(struct vc_data *vc, int w, int h, int charcount, 2365 const u8 * data, int userfont) 2366 { 2367 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 2368 struct fbcon_ops *ops = info->fbcon_par; 2369 struct fbcon_display *p = &fb_display[vc->vc_num]; 2370 int resize; 2371 char *old_data = NULL; 2372 2373 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height); 2374 if (p->userfont) 2375 old_data = vc->vc_font.data; 2376 vc->vc_font.data = (void *)(p->fontdata = data); 2377 if ((p->userfont = userfont)) 2378 REFCOUNT(data)++; 2379 vc->vc_font.width = w; 2380 vc->vc_font.height = h; 2381 vc->vc_font.charcount = charcount; 2382 if (vc->vc_hi_font_mask && charcount == 256) 2383 set_vc_hi_font(vc, false); 2384 else if (!vc->vc_hi_font_mask && charcount == 512) 2385 set_vc_hi_font(vc, true); 2386 2387 if (resize) { 2388 int cols, rows; 2389 2390 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 2391 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 2392 cols /= w; 2393 rows /= h; 2394 vc_resize(vc, cols, rows); 2395 } else if (con_is_visible(vc) 2396 && vc->vc_mode == KD_TEXT) { 2397 fbcon_clear_margins(vc, 0); 2398 update_screen(vc); 2399 } 2400 2401 if (old_data && (--REFCOUNT(old_data) == 0)) 2402 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int)); 2403 return 0; 2404 } 2405 2406 /* 2407 * User asked to set font; we are guaranteed that 2408 * a) width and height are in range 1..32 2409 * b) charcount does not exceed 512 2410 * but lets not assume that, since someone might someday want to use larger 2411 * fonts. And charcount of 512 is small for unicode support. 2412 * 2413 * However, user space gives the font in 32 rows , regardless of 2414 * actual font height. So a new API is needed if support for larger fonts 2415 * is ever implemented. 2416 */ 2417 2418 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, 2419 unsigned int flags) 2420 { 2421 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 2422 unsigned charcount = font->charcount; 2423 int w = font->width; 2424 int h = font->height; 2425 int size; 2426 int i, csum; 2427 u8 *new_data, *data = font->data; 2428 int pitch = PITCH(font->width); 2429 2430 /* Is there a reason why fbconsole couldn't handle any charcount >256? 2431 * If not this check should be changed to charcount < 256 */ 2432 if (charcount != 256 && charcount != 512) 2433 return -EINVAL; 2434 2435 /* Make sure drawing engine can handle the font */ 2436 if (!(info->pixmap.blit_x & (1 << (font->width - 1))) || 2437 !(info->pixmap.blit_y & (1 << (font->height - 1)))) 2438 return -EINVAL; 2439 2440 /* Make sure driver can handle the font length */ 2441 if (fbcon_invalid_charcount(info, charcount)) 2442 return -EINVAL; 2443 2444 size = CALC_FONTSZ(h, pitch, charcount); 2445 2446 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER); 2447 2448 if (!new_data) 2449 return -ENOMEM; 2450 2451 memset(new_data, 0, FONT_EXTRA_WORDS * sizeof(int)); 2452 2453 new_data += FONT_EXTRA_WORDS * sizeof(int); 2454 FNTSIZE(new_data) = size; 2455 REFCOUNT(new_data) = 0; /* usage counter */ 2456 for (i=0; i< charcount; i++) { 2457 memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch); 2458 } 2459 2460 /* Since linux has a nice crc32 function use it for counting font 2461 * checksums. */ 2462 csum = crc32(0, new_data, size); 2463 2464 FNTSUM(new_data) = csum; 2465 /* Check if the same font is on some other console already */ 2466 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2467 struct vc_data *tmp = vc_cons[i].d; 2468 2469 if (fb_display[i].userfont && 2470 fb_display[i].fontdata && 2471 FNTSUM(fb_display[i].fontdata) == csum && 2472 FNTSIZE(fb_display[i].fontdata) == size && 2473 tmp->vc_font.width == w && 2474 !memcmp(fb_display[i].fontdata, new_data, size)) { 2475 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int)); 2476 new_data = (u8 *)fb_display[i].fontdata; 2477 break; 2478 } 2479 } 2480 return fbcon_do_set_font(vc, font->width, font->height, charcount, new_data, 1); 2481 } 2482 2483 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name) 2484 { 2485 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 2486 const struct font_desc *f; 2487 2488 if (!name) 2489 f = get_default_font(info->var.xres, info->var.yres, 2490 info->pixmap.blit_x, info->pixmap.blit_y); 2491 else if (!(f = find_font(name))) 2492 return -ENOENT; 2493 2494 font->width = f->width; 2495 font->height = f->height; 2496 return fbcon_do_set_font(vc, f->width, f->height, f->charcount, f->data, 0); 2497 } 2498 2499 static u16 palette_red[16]; 2500 static u16 palette_green[16]; 2501 static u16 palette_blue[16]; 2502 2503 static struct fb_cmap palette_cmap = { 2504 0, 16, palette_red, palette_green, palette_blue, NULL 2505 }; 2506 2507 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table) 2508 { 2509 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 2510 int i, j, k, depth; 2511 u8 val; 2512 2513 if (fbcon_is_inactive(vc, info)) 2514 return; 2515 2516 if (!con_is_visible(vc)) 2517 return; 2518 2519 depth = fb_get_color_depth(&info->var, &info->fix); 2520 if (depth > 3) { 2521 for (i = j = 0; i < 16; i++) { 2522 k = table[i]; 2523 val = vc->vc_palette[j++]; 2524 palette_red[k] = (val << 8) | val; 2525 val = vc->vc_palette[j++]; 2526 palette_green[k] = (val << 8) | val; 2527 val = vc->vc_palette[j++]; 2528 palette_blue[k] = (val << 8) | val; 2529 } 2530 palette_cmap.len = 16; 2531 palette_cmap.start = 0; 2532 /* 2533 * If framebuffer is capable of less than 16 colors, 2534 * use default palette of fbcon. 2535 */ 2536 } else 2537 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap); 2538 2539 fb_set_cmap(&palette_cmap, info); 2540 } 2541 2542 static u16 *fbcon_screen_pos(const struct vc_data *vc, int offset) 2543 { 2544 return (u16 *) (vc->vc_origin + offset); 2545 } 2546 2547 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos, 2548 int *px, int *py) 2549 { 2550 unsigned long ret; 2551 int x, y; 2552 2553 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) { 2554 unsigned long offset = (pos - vc->vc_origin) / 2; 2555 2556 x = offset % vc->vc_cols; 2557 y = offset / vc->vc_cols; 2558 ret = pos + (vc->vc_cols - x) * 2; 2559 } else { 2560 /* Should not happen */ 2561 x = y = 0; 2562 ret = vc->vc_origin; 2563 } 2564 if (px) 2565 *px = x; 2566 if (py) 2567 *py = y; 2568 return ret; 2569 } 2570 2571 /* As we might be inside of softback, we may work with non-contiguous buffer, 2572 that's why we have to use a separate routine. */ 2573 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt) 2574 { 2575 while (cnt--) { 2576 u16 a = scr_readw(p); 2577 if (!vc->vc_can_do_color) 2578 a ^= 0x0800; 2579 else if (vc->vc_hi_font_mask == 0x100) 2580 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | 2581 (((a) & 0x0e00) << 4); 2582 else 2583 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | 2584 (((a) & 0x0700) << 4); 2585 scr_writew(a, p++); 2586 } 2587 } 2588 2589 void fbcon_suspended(struct fb_info *info) 2590 { 2591 struct vc_data *vc = NULL; 2592 struct fbcon_ops *ops = info->fbcon_par; 2593 2594 if (!ops || ops->currcon < 0) 2595 return; 2596 vc = vc_cons[ops->currcon].d; 2597 2598 /* Clear cursor, restore saved data */ 2599 fbcon_cursor(vc, CM_ERASE); 2600 } 2601 2602 void fbcon_resumed(struct fb_info *info) 2603 { 2604 struct vc_data *vc; 2605 struct fbcon_ops *ops = info->fbcon_par; 2606 2607 if (!ops || ops->currcon < 0) 2608 return; 2609 vc = vc_cons[ops->currcon].d; 2610 2611 update_screen(vc); 2612 } 2613 2614 static void fbcon_modechanged(struct fb_info *info) 2615 { 2616 struct fbcon_ops *ops = info->fbcon_par; 2617 struct vc_data *vc; 2618 struct fbcon_display *p; 2619 int rows, cols; 2620 2621 if (!ops || ops->currcon < 0) 2622 return; 2623 vc = vc_cons[ops->currcon].d; 2624 if (vc->vc_mode != KD_TEXT || 2625 registered_fb[con2fb_map[ops->currcon]] != info) 2626 return; 2627 2628 p = &fb_display[vc->vc_num]; 2629 set_blitting_type(vc, info); 2630 2631 if (con_is_visible(vc)) { 2632 var_to_display(p, &info->var, info); 2633 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 2634 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 2635 cols /= vc->vc_font.width; 2636 rows /= vc->vc_font.height; 2637 vc_resize(vc, cols, rows); 2638 updatescrollmode(p, info, vc); 2639 scrollback_max = 0; 2640 scrollback_current = 0; 2641 2642 if (!fbcon_is_inactive(vc, info)) { 2643 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0; 2644 ops->update_start(info); 2645 } 2646 2647 fbcon_set_palette(vc, color_table); 2648 update_screen(vc); 2649 } 2650 } 2651 2652 static void fbcon_set_all_vcs(struct fb_info *info) 2653 { 2654 struct fbcon_ops *ops = info->fbcon_par; 2655 struct vc_data *vc; 2656 struct fbcon_display *p; 2657 int i, rows, cols, fg = -1; 2658 2659 if (!ops || ops->currcon < 0) 2660 return; 2661 2662 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2663 vc = vc_cons[i].d; 2664 if (!vc || vc->vc_mode != KD_TEXT || 2665 registered_fb[con2fb_map[i]] != info) 2666 continue; 2667 2668 if (con_is_visible(vc)) { 2669 fg = i; 2670 continue; 2671 } 2672 2673 p = &fb_display[vc->vc_num]; 2674 set_blitting_type(vc, info); 2675 var_to_display(p, &info->var, info); 2676 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 2677 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 2678 cols /= vc->vc_font.width; 2679 rows /= vc->vc_font.height; 2680 vc_resize(vc, cols, rows); 2681 } 2682 2683 if (fg != -1) 2684 fbcon_modechanged(info); 2685 } 2686 2687 2688 void fbcon_update_vcs(struct fb_info *info, bool all) 2689 { 2690 if (all) 2691 fbcon_set_all_vcs(info); 2692 else 2693 fbcon_modechanged(info); 2694 } 2695 EXPORT_SYMBOL(fbcon_update_vcs); 2696 2697 int fbcon_mode_deleted(struct fb_info *info, 2698 struct fb_videomode *mode) 2699 { 2700 struct fb_info *fb_info; 2701 struct fbcon_display *p; 2702 int i, j, found = 0; 2703 2704 /* before deletion, ensure that mode is not in use */ 2705 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2706 j = con2fb_map[i]; 2707 if (j == -1) 2708 continue; 2709 fb_info = registered_fb[j]; 2710 if (fb_info != info) 2711 continue; 2712 p = &fb_display[i]; 2713 if (!p || !p->mode) 2714 continue; 2715 if (fb_mode_is_equal(p->mode, mode)) { 2716 found = 1; 2717 break; 2718 } 2719 } 2720 return found; 2721 } 2722 2723 #ifdef CONFIG_VT_HW_CONSOLE_BINDING 2724 static void fbcon_unbind(void) 2725 { 2726 int ret; 2727 2728 ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc, 2729 fbcon_is_default); 2730 2731 if (!ret) 2732 fbcon_has_console_bind = 0; 2733 } 2734 #else 2735 static inline void fbcon_unbind(void) {} 2736 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */ 2737 2738 /* called with console_lock held */ 2739 void fbcon_fb_unbind(struct fb_info *info) 2740 { 2741 int i, new_idx = -1, ret = 0; 2742 int idx = info->node; 2743 2744 WARN_CONSOLE_UNLOCKED(); 2745 2746 if (!fbcon_has_console_bind) 2747 return; 2748 2749 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2750 if (con2fb_map[i] != idx && 2751 con2fb_map[i] != -1) { 2752 new_idx = con2fb_map[i]; 2753 break; 2754 } 2755 } 2756 2757 if (new_idx != -1) { 2758 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2759 if (con2fb_map[i] == idx) 2760 set_con2fb_map(i, new_idx, 0); 2761 } 2762 } else { 2763 struct fb_info *info = registered_fb[idx]; 2764 2765 /* This is sort of like set_con2fb_map, except it maps 2766 * the consoles to no device and then releases the 2767 * oldinfo to free memory and cancel the cursor blink 2768 * timer. I can imagine this just becoming part of 2769 * set_con2fb_map where new_idx is -1 2770 */ 2771 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2772 if (con2fb_map[i] == idx) { 2773 con2fb_map[i] = -1; 2774 if (!search_fb_in_map(idx)) { 2775 ret = con2fb_release_oldinfo(vc_cons[i].d, 2776 info, NULL, i, 2777 idx, 0); 2778 if (ret) { 2779 con2fb_map[i] = idx; 2780 return; 2781 } 2782 } 2783 } 2784 } 2785 fbcon_unbind(); 2786 } 2787 } 2788 2789 /* called with console_lock held */ 2790 void fbcon_fb_unregistered(struct fb_info *info) 2791 { 2792 int i, idx; 2793 2794 WARN_CONSOLE_UNLOCKED(); 2795 2796 if (deferred_takeover) 2797 return; 2798 2799 idx = info->node; 2800 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2801 if (con2fb_map[i] == idx) 2802 con2fb_map[i] = -1; 2803 } 2804 2805 if (idx == info_idx) { 2806 info_idx = -1; 2807 2808 for_each_registered_fb(i) { 2809 info_idx = i; 2810 break; 2811 } 2812 } 2813 2814 if (info_idx != -1) { 2815 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2816 if (con2fb_map[i] == -1) 2817 con2fb_map[i] = info_idx; 2818 } 2819 } 2820 2821 if (primary_device == idx) 2822 primary_device = -1; 2823 2824 if (!num_registered_fb) 2825 do_unregister_con_driver(&fb_con); 2826 } 2827 2828 void fbcon_remap_all(struct fb_info *info) 2829 { 2830 int i, idx = info->node; 2831 2832 console_lock(); 2833 if (deferred_takeover) { 2834 for (i = first_fb_vc; i <= last_fb_vc; i++) 2835 con2fb_map_boot[i] = idx; 2836 fbcon_map_override(); 2837 console_unlock(); 2838 return; 2839 } 2840 2841 for (i = first_fb_vc; i <= last_fb_vc; i++) 2842 set_con2fb_map(i, idx, 0); 2843 2844 if (con_is_bound(&fb_con)) { 2845 printk(KERN_INFO "fbcon: Remapping primary device, " 2846 "fb%i, to tty %i-%i\n", idx, 2847 first_fb_vc + 1, last_fb_vc + 1); 2848 info_idx = idx; 2849 } 2850 console_unlock(); 2851 } 2852 2853 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY 2854 static void fbcon_select_primary(struct fb_info *info) 2855 { 2856 if (!map_override && primary_device == -1 && 2857 fb_is_primary_device(info)) { 2858 int i; 2859 2860 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n", 2861 info->fix.id, info->node); 2862 primary_device = info->node; 2863 2864 for (i = first_fb_vc; i <= last_fb_vc; i++) 2865 con2fb_map_boot[i] = primary_device; 2866 2867 if (con_is_bound(&fb_con)) { 2868 printk(KERN_INFO "fbcon: Remapping primary device, " 2869 "fb%i, to tty %i-%i\n", info->node, 2870 first_fb_vc + 1, last_fb_vc + 1); 2871 info_idx = primary_device; 2872 } 2873 } 2874 2875 } 2876 #else 2877 static inline void fbcon_select_primary(struct fb_info *info) 2878 { 2879 return; 2880 } 2881 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */ 2882 2883 /* called with console_lock held */ 2884 int fbcon_fb_registered(struct fb_info *info) 2885 { 2886 int ret = 0, i, idx; 2887 2888 WARN_CONSOLE_UNLOCKED(); 2889 2890 idx = info->node; 2891 fbcon_select_primary(info); 2892 2893 if (deferred_takeover) { 2894 pr_info("fbcon: Deferring console take-over\n"); 2895 return 0; 2896 } 2897 2898 if (info_idx == -1) { 2899 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2900 if (con2fb_map_boot[i] == idx) { 2901 info_idx = idx; 2902 break; 2903 } 2904 } 2905 2906 if (info_idx != -1) 2907 ret = do_fbcon_takeover(1); 2908 } else { 2909 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2910 if (con2fb_map_boot[i] == idx) 2911 set_con2fb_map(i, idx, 0); 2912 } 2913 } 2914 2915 return ret; 2916 } 2917 2918 void fbcon_fb_blanked(struct fb_info *info, int blank) 2919 { 2920 struct fbcon_ops *ops = info->fbcon_par; 2921 struct vc_data *vc; 2922 2923 if (!ops || ops->currcon < 0) 2924 return; 2925 2926 vc = vc_cons[ops->currcon].d; 2927 if (vc->vc_mode != KD_TEXT || 2928 registered_fb[con2fb_map[ops->currcon]] != info) 2929 return; 2930 2931 if (con_is_visible(vc)) { 2932 if (blank) 2933 do_blank_screen(0); 2934 else 2935 do_unblank_screen(0); 2936 } 2937 ops->blank_state = blank; 2938 } 2939 2940 void fbcon_new_modelist(struct fb_info *info) 2941 { 2942 int i; 2943 struct vc_data *vc; 2944 struct fb_var_screeninfo var; 2945 const struct fb_videomode *mode; 2946 2947 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2948 if (registered_fb[con2fb_map[i]] != info) 2949 continue; 2950 if (!fb_display[i].mode) 2951 continue; 2952 vc = vc_cons[i].d; 2953 display_to_var(&var, &fb_display[i]); 2954 mode = fb_find_nearest_mode(fb_display[i].mode, 2955 &info->modelist); 2956 fb_videomode_to_var(&var, mode); 2957 fbcon_set_disp(info, &var, vc->vc_num); 2958 } 2959 } 2960 2961 void fbcon_get_requirement(struct fb_info *info, 2962 struct fb_blit_caps *caps) 2963 { 2964 struct vc_data *vc; 2965 2966 if (caps->flags) { 2967 int i, charcnt; 2968 2969 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2970 vc = vc_cons[i].d; 2971 if (vc && vc->vc_mode == KD_TEXT && 2972 info->node == con2fb_map[i]) { 2973 caps->x |= 1 << (vc->vc_font.width - 1); 2974 caps->y |= 1 << (vc->vc_font.height - 1); 2975 charcnt = vc->vc_font.charcount; 2976 if (caps->len < charcnt) 2977 caps->len = charcnt; 2978 } 2979 } 2980 } else { 2981 vc = vc_cons[fg_console].d; 2982 2983 if (vc && vc->vc_mode == KD_TEXT && 2984 info->node == con2fb_map[fg_console]) { 2985 caps->x = 1 << (vc->vc_font.width - 1); 2986 caps->y = 1 << (vc->vc_font.height - 1); 2987 caps->len = vc->vc_font.charcount; 2988 } 2989 } 2990 } 2991 2992 int fbcon_set_con2fb_map_ioctl(void __user *argp) 2993 { 2994 struct fb_con2fbmap con2fb; 2995 int ret; 2996 2997 if (copy_from_user(&con2fb, argp, sizeof(con2fb))) 2998 return -EFAULT; 2999 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) 3000 return -EINVAL; 3001 if (con2fb.framebuffer >= FB_MAX) 3002 return -EINVAL; 3003 if (!registered_fb[con2fb.framebuffer]) 3004 request_module("fb%d", con2fb.framebuffer); 3005 if (!registered_fb[con2fb.framebuffer]) { 3006 return -EINVAL; 3007 } 3008 3009 console_lock(); 3010 ret = set_con2fb_map(con2fb.console - 1, 3011 con2fb.framebuffer, 1); 3012 console_unlock(); 3013 3014 return ret; 3015 } 3016 3017 int fbcon_get_con2fb_map_ioctl(void __user *argp) 3018 { 3019 struct fb_con2fbmap con2fb; 3020 3021 if (copy_from_user(&con2fb, argp, sizeof(con2fb))) 3022 return -EFAULT; 3023 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) 3024 return -EINVAL; 3025 3026 console_lock(); 3027 con2fb.framebuffer = con2fb_map[con2fb.console - 1]; 3028 console_unlock(); 3029 3030 return copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0; 3031 } 3032 3033 /* 3034 * The console `switch' structure for the frame buffer based console 3035 */ 3036 3037 static const struct consw fb_con = { 3038 .owner = THIS_MODULE, 3039 .con_startup = fbcon_startup, 3040 .con_init = fbcon_init, 3041 .con_deinit = fbcon_deinit, 3042 .con_clear = fbcon_clear, 3043 .con_putc = fbcon_putc, 3044 .con_putcs = fbcon_putcs, 3045 .con_cursor = fbcon_cursor, 3046 .con_scroll = fbcon_scroll, 3047 .con_switch = fbcon_switch, 3048 .con_blank = fbcon_blank, 3049 .con_font_set = fbcon_set_font, 3050 .con_font_get = fbcon_get_font, 3051 .con_font_default = fbcon_set_def_font, 3052 .con_set_palette = fbcon_set_palette, 3053 .con_invert_region = fbcon_invert_region, 3054 .con_screen_pos = fbcon_screen_pos, 3055 .con_getxy = fbcon_getxy, 3056 .con_resize = fbcon_resize, 3057 .con_debug_enter = fbcon_debug_enter, 3058 .con_debug_leave = fbcon_debug_leave, 3059 }; 3060 3061 static ssize_t store_rotate(struct device *device, 3062 struct device_attribute *attr, const char *buf, 3063 size_t count) 3064 { 3065 struct fb_info *info; 3066 int rotate, idx; 3067 char **last = NULL; 3068 3069 console_lock(); 3070 idx = con2fb_map[fg_console]; 3071 3072 if (idx == -1 || registered_fb[idx] == NULL) 3073 goto err; 3074 3075 info = registered_fb[idx]; 3076 rotate = simple_strtoul(buf, last, 0); 3077 fbcon_rotate(info, rotate); 3078 err: 3079 console_unlock(); 3080 return count; 3081 } 3082 3083 static ssize_t store_rotate_all(struct device *device, 3084 struct device_attribute *attr,const char *buf, 3085 size_t count) 3086 { 3087 struct fb_info *info; 3088 int rotate, idx; 3089 char **last = NULL; 3090 3091 console_lock(); 3092 idx = con2fb_map[fg_console]; 3093 3094 if (idx == -1 || registered_fb[idx] == NULL) 3095 goto err; 3096 3097 info = registered_fb[idx]; 3098 rotate = simple_strtoul(buf, last, 0); 3099 fbcon_rotate_all(info, rotate); 3100 err: 3101 console_unlock(); 3102 return count; 3103 } 3104 3105 static ssize_t show_rotate(struct device *device, 3106 struct device_attribute *attr,char *buf) 3107 { 3108 struct fb_info *info; 3109 int rotate = 0, idx; 3110 3111 console_lock(); 3112 idx = con2fb_map[fg_console]; 3113 3114 if (idx == -1 || registered_fb[idx] == NULL) 3115 goto err; 3116 3117 info = registered_fb[idx]; 3118 rotate = fbcon_get_rotate(info); 3119 err: 3120 console_unlock(); 3121 return snprintf(buf, PAGE_SIZE, "%d\n", rotate); 3122 } 3123 3124 static ssize_t show_cursor_blink(struct device *device, 3125 struct device_attribute *attr, char *buf) 3126 { 3127 struct fb_info *info; 3128 struct fbcon_ops *ops; 3129 int idx, blink = -1; 3130 3131 console_lock(); 3132 idx = con2fb_map[fg_console]; 3133 3134 if (idx == -1 || registered_fb[idx] == NULL) 3135 goto err; 3136 3137 info = registered_fb[idx]; 3138 ops = info->fbcon_par; 3139 3140 if (!ops) 3141 goto err; 3142 3143 blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0; 3144 err: 3145 console_unlock(); 3146 return snprintf(buf, PAGE_SIZE, "%d\n", blink); 3147 } 3148 3149 static ssize_t store_cursor_blink(struct device *device, 3150 struct device_attribute *attr, 3151 const char *buf, size_t count) 3152 { 3153 struct fb_info *info; 3154 int blink, idx; 3155 char **last = NULL; 3156 3157 console_lock(); 3158 idx = con2fb_map[fg_console]; 3159 3160 if (idx == -1 || registered_fb[idx] == NULL) 3161 goto err; 3162 3163 info = registered_fb[idx]; 3164 3165 if (!info->fbcon_par) 3166 goto err; 3167 3168 blink = simple_strtoul(buf, last, 0); 3169 3170 if (blink) { 3171 fbcon_cursor_noblink = 0; 3172 fbcon_add_cursor_timer(info); 3173 } else { 3174 fbcon_cursor_noblink = 1; 3175 fbcon_del_cursor_timer(info); 3176 } 3177 3178 err: 3179 console_unlock(); 3180 return count; 3181 } 3182 3183 static struct device_attribute device_attrs[] = { 3184 __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate), 3185 __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all), 3186 __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink, 3187 store_cursor_blink), 3188 }; 3189 3190 static int fbcon_init_device(void) 3191 { 3192 int i, error = 0; 3193 3194 fbcon_has_sysfs = 1; 3195 3196 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) { 3197 error = device_create_file(fbcon_device, &device_attrs[i]); 3198 3199 if (error) 3200 break; 3201 } 3202 3203 if (error) { 3204 while (--i >= 0) 3205 device_remove_file(fbcon_device, &device_attrs[i]); 3206 3207 fbcon_has_sysfs = 0; 3208 } 3209 3210 return 0; 3211 } 3212 3213 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 3214 static void fbcon_register_existing_fbs(struct work_struct *work) 3215 { 3216 int i; 3217 3218 console_lock(); 3219 3220 for_each_registered_fb(i) 3221 fbcon_fb_registered(registered_fb[i]); 3222 3223 console_unlock(); 3224 } 3225 3226 static struct notifier_block fbcon_output_nb; 3227 static DECLARE_WORK(fbcon_deferred_takeover_work, fbcon_register_existing_fbs); 3228 3229 static int fbcon_output_notifier(struct notifier_block *nb, 3230 unsigned long action, void *data) 3231 { 3232 WARN_CONSOLE_UNLOCKED(); 3233 3234 pr_info("fbcon: Taking over console\n"); 3235 3236 dummycon_unregister_output_notifier(&fbcon_output_nb); 3237 deferred_takeover = false; 3238 logo_shown = FBCON_LOGO_DONTSHOW; 3239 3240 /* We may get called in atomic context */ 3241 schedule_work(&fbcon_deferred_takeover_work); 3242 3243 return NOTIFY_OK; 3244 } 3245 #endif 3246 3247 static void fbcon_start(void) 3248 { 3249 WARN_CONSOLE_UNLOCKED(); 3250 3251 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 3252 if (conswitchp != &dummy_con) 3253 deferred_takeover = false; 3254 3255 if (deferred_takeover) { 3256 fbcon_output_nb.notifier_call = fbcon_output_notifier; 3257 dummycon_register_output_notifier(&fbcon_output_nb); 3258 return; 3259 } 3260 #endif 3261 3262 if (num_registered_fb) { 3263 int i; 3264 3265 for_each_registered_fb(i) { 3266 info_idx = i; 3267 break; 3268 } 3269 3270 do_fbcon_takeover(0); 3271 } 3272 } 3273 3274 static void fbcon_exit(void) 3275 { 3276 struct fb_info *info; 3277 int i, j, mapped; 3278 3279 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 3280 if (deferred_takeover) { 3281 dummycon_unregister_output_notifier(&fbcon_output_nb); 3282 deferred_takeover = false; 3283 } 3284 #endif 3285 3286 for_each_registered_fb(i) { 3287 int pending = 0; 3288 3289 mapped = 0; 3290 info = registered_fb[i]; 3291 3292 if (info->queue.func) 3293 pending = cancel_work_sync(&info->queue); 3294 pr_debug("fbcon: %s pending work\n", (pending ? "canceled" : "no")); 3295 3296 for (j = first_fb_vc; j <= last_fb_vc; j++) { 3297 if (con2fb_map[j] == i) { 3298 mapped = 1; 3299 con2fb_map[j] = -1; 3300 } 3301 } 3302 3303 if (mapped) { 3304 if (info->fbops->fb_release) 3305 info->fbops->fb_release(info, 0); 3306 module_put(info->fbops->owner); 3307 3308 if (info->fbcon_par) { 3309 struct fbcon_ops *ops = info->fbcon_par; 3310 3311 fbcon_del_cursor_timer(info); 3312 kfree(ops->cursor_src); 3313 kfree(ops->cursor_state.mask); 3314 kfree(info->fbcon_par); 3315 info->fbcon_par = NULL; 3316 } 3317 3318 if (info->queue.func == fb_flashcursor) 3319 info->queue.func = NULL; 3320 } 3321 } 3322 } 3323 3324 void __init fb_console_init(void) 3325 { 3326 int i; 3327 3328 console_lock(); 3329 fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL, 3330 "fbcon"); 3331 3332 if (IS_ERR(fbcon_device)) { 3333 printk(KERN_WARNING "Unable to create device " 3334 "for fbcon; errno = %ld\n", 3335 PTR_ERR(fbcon_device)); 3336 fbcon_device = NULL; 3337 } else 3338 fbcon_init_device(); 3339 3340 for (i = 0; i < MAX_NR_CONSOLES; i++) 3341 con2fb_map[i] = -1; 3342 3343 fbcon_start(); 3344 console_unlock(); 3345 } 3346 3347 #ifdef MODULE 3348 3349 static void __exit fbcon_deinit_device(void) 3350 { 3351 int i; 3352 3353 if (fbcon_has_sysfs) { 3354 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) 3355 device_remove_file(fbcon_device, &device_attrs[i]); 3356 3357 fbcon_has_sysfs = 0; 3358 } 3359 } 3360 3361 void __exit fb_console_exit(void) 3362 { 3363 console_lock(); 3364 fbcon_deinit_device(); 3365 device_destroy(fb_class, MKDEV(0, 0)); 3366 fbcon_exit(); 3367 do_unregister_con_driver(&fb_con); 3368 console_unlock(); 3369 } 3370 #endif 3371