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 if (!ops->cursor) 1337 return; 1338 1339 ops->cursor(vc, info, mode, get_color(vc, info, c, 1), 1340 get_color(vc, info, c, 0)); 1341 } 1342 1343 static int scrollback_phys_max = 0; 1344 static int scrollback_max = 0; 1345 static int scrollback_current = 0; 1346 1347 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var, 1348 int unit) 1349 { 1350 struct fbcon_display *p, *t; 1351 struct vc_data **default_mode, *vc; 1352 struct vc_data *svc; 1353 struct fbcon_ops *ops = info->fbcon_par; 1354 int rows, cols; 1355 1356 p = &fb_display[unit]; 1357 1358 if (var_to_display(p, var, info)) 1359 return; 1360 1361 vc = vc_cons[unit].d; 1362 1363 if (!vc) 1364 return; 1365 1366 default_mode = vc->vc_display_fg; 1367 svc = *default_mode; 1368 t = &fb_display[svc->vc_num]; 1369 1370 if (!vc->vc_font.data) { 1371 vc->vc_font.data = (void *)(p->fontdata = t->fontdata); 1372 vc->vc_font.width = (*default_mode)->vc_font.width; 1373 vc->vc_font.height = (*default_mode)->vc_font.height; 1374 vc->vc_font.charcount = (*default_mode)->vc_font.charcount; 1375 p->userfont = t->userfont; 1376 if (p->userfont) 1377 REFCOUNT(p->fontdata)++; 1378 } 1379 1380 var->activate = FB_ACTIVATE_NOW; 1381 info->var.activate = var->activate; 1382 var->yoffset = info->var.yoffset; 1383 var->xoffset = info->var.xoffset; 1384 fb_set_var(info, var); 1385 ops->var = info->var; 1386 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1); 1387 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 1388 if (vc->vc_font.charcount == 256) { 1389 vc->vc_hi_font_mask = 0; 1390 } else { 1391 vc->vc_hi_font_mask = 0x100; 1392 if (vc->vc_can_do_color) 1393 vc->vc_complement_mask <<= 1; 1394 } 1395 1396 if (!*svc->vc_uni_pagedir_loc) 1397 con_set_default_unimap(svc); 1398 if (!*vc->vc_uni_pagedir_loc) 1399 con_copy_unimap(vc, svc); 1400 1401 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 1402 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 1403 cols /= vc->vc_font.width; 1404 rows /= vc->vc_font.height; 1405 vc_resize(vc, cols, rows); 1406 1407 if (con_is_visible(vc)) { 1408 update_screen(vc); 1409 } 1410 } 1411 1412 static __inline__ void ywrap_up(struct vc_data *vc, int count) 1413 { 1414 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1415 struct fbcon_ops *ops = info->fbcon_par; 1416 struct fbcon_display *p = &fb_display[vc->vc_num]; 1417 1418 p->yscroll += count; 1419 if (p->yscroll >= p->vrows) /* Deal with wrap */ 1420 p->yscroll -= p->vrows; 1421 ops->var.xoffset = 0; 1422 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1423 ops->var.vmode |= FB_VMODE_YWRAP; 1424 ops->update_start(info); 1425 scrollback_max += count; 1426 if (scrollback_max > scrollback_phys_max) 1427 scrollback_max = scrollback_phys_max; 1428 scrollback_current = 0; 1429 } 1430 1431 static __inline__ void ywrap_down(struct vc_data *vc, int count) 1432 { 1433 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1434 struct fbcon_ops *ops = info->fbcon_par; 1435 struct fbcon_display *p = &fb_display[vc->vc_num]; 1436 1437 p->yscroll -= count; 1438 if (p->yscroll < 0) /* Deal with wrap */ 1439 p->yscroll += p->vrows; 1440 ops->var.xoffset = 0; 1441 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1442 ops->var.vmode |= FB_VMODE_YWRAP; 1443 ops->update_start(info); 1444 scrollback_max -= count; 1445 if (scrollback_max < 0) 1446 scrollback_max = 0; 1447 scrollback_current = 0; 1448 } 1449 1450 static __inline__ void ypan_up(struct vc_data *vc, int count) 1451 { 1452 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1453 struct fbcon_display *p = &fb_display[vc->vc_num]; 1454 struct fbcon_ops *ops = info->fbcon_par; 1455 1456 p->yscroll += count; 1457 if (p->yscroll > p->vrows - vc->vc_rows) { 1458 ops->bmove(vc, info, p->vrows - vc->vc_rows, 1459 0, 0, 0, vc->vc_rows, vc->vc_cols); 1460 p->yscroll -= p->vrows - vc->vc_rows; 1461 } 1462 1463 ops->var.xoffset = 0; 1464 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1465 ops->var.vmode &= ~FB_VMODE_YWRAP; 1466 ops->update_start(info); 1467 fbcon_clear_margins(vc, 1); 1468 scrollback_max += count; 1469 if (scrollback_max > scrollback_phys_max) 1470 scrollback_max = scrollback_phys_max; 1471 scrollback_current = 0; 1472 } 1473 1474 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count) 1475 { 1476 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1477 struct fbcon_ops *ops = info->fbcon_par; 1478 struct fbcon_display *p = &fb_display[vc->vc_num]; 1479 1480 p->yscroll += count; 1481 1482 if (p->yscroll > p->vrows - vc->vc_rows) { 1483 p->yscroll -= p->vrows - vc->vc_rows; 1484 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t); 1485 } 1486 1487 ops->var.xoffset = 0; 1488 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1489 ops->var.vmode &= ~FB_VMODE_YWRAP; 1490 ops->update_start(info); 1491 fbcon_clear_margins(vc, 1); 1492 scrollback_max += count; 1493 if (scrollback_max > scrollback_phys_max) 1494 scrollback_max = scrollback_phys_max; 1495 scrollback_current = 0; 1496 } 1497 1498 static __inline__ void ypan_down(struct vc_data *vc, int count) 1499 { 1500 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1501 struct fbcon_display *p = &fb_display[vc->vc_num]; 1502 struct fbcon_ops *ops = info->fbcon_par; 1503 1504 p->yscroll -= count; 1505 if (p->yscroll < 0) { 1506 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows, 1507 0, vc->vc_rows, vc->vc_cols); 1508 p->yscroll += p->vrows - vc->vc_rows; 1509 } 1510 1511 ops->var.xoffset = 0; 1512 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1513 ops->var.vmode &= ~FB_VMODE_YWRAP; 1514 ops->update_start(info); 1515 fbcon_clear_margins(vc, 1); 1516 scrollback_max -= count; 1517 if (scrollback_max < 0) 1518 scrollback_max = 0; 1519 scrollback_current = 0; 1520 } 1521 1522 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count) 1523 { 1524 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1525 struct fbcon_ops *ops = info->fbcon_par; 1526 struct fbcon_display *p = &fb_display[vc->vc_num]; 1527 1528 p->yscroll -= count; 1529 1530 if (p->yscroll < 0) { 1531 p->yscroll += p->vrows - vc->vc_rows; 1532 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count); 1533 } 1534 1535 ops->var.xoffset = 0; 1536 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1537 ops->var.vmode &= ~FB_VMODE_YWRAP; 1538 ops->update_start(info); 1539 fbcon_clear_margins(vc, 1); 1540 scrollback_max -= count; 1541 if (scrollback_max < 0) 1542 scrollback_max = 0; 1543 scrollback_current = 0; 1544 } 1545 1546 static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p, 1547 int line, int count, int dy) 1548 { 1549 unsigned short *s = (unsigned short *) 1550 (vc->vc_origin + vc->vc_size_row * line); 1551 1552 while (count--) { 1553 unsigned short *start = s; 1554 unsigned short *le = advance_row(s, 1); 1555 unsigned short c; 1556 int x = 0; 1557 unsigned short attr = 1; 1558 1559 do { 1560 c = scr_readw(s); 1561 if (attr != (c & 0xff00)) { 1562 attr = c & 0xff00; 1563 if (s > start) { 1564 fbcon_putcs(vc, start, s - start, 1565 dy, x); 1566 x += s - start; 1567 start = s; 1568 } 1569 } 1570 console_conditional_schedule(); 1571 s++; 1572 } while (s < le); 1573 if (s > start) 1574 fbcon_putcs(vc, start, s - start, dy, x); 1575 console_conditional_schedule(); 1576 dy++; 1577 } 1578 } 1579 1580 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info, 1581 struct fbcon_display *p, int line, int count, int ycount) 1582 { 1583 int offset = ycount * vc->vc_cols; 1584 unsigned short *d = (unsigned short *) 1585 (vc->vc_origin + vc->vc_size_row * line); 1586 unsigned short *s = d + offset; 1587 struct fbcon_ops *ops = info->fbcon_par; 1588 1589 while (count--) { 1590 unsigned short *start = s; 1591 unsigned short *le = advance_row(s, 1); 1592 unsigned short c; 1593 int x = 0; 1594 1595 do { 1596 c = scr_readw(s); 1597 1598 if (c == scr_readw(d)) { 1599 if (s > start) { 1600 ops->bmove(vc, info, line + ycount, x, 1601 line, x, 1, s-start); 1602 x += s - start + 1; 1603 start = s + 1; 1604 } else { 1605 x++; 1606 start++; 1607 } 1608 } 1609 1610 scr_writew(c, d); 1611 console_conditional_schedule(); 1612 s++; 1613 d++; 1614 } while (s < le); 1615 if (s > start) 1616 ops->bmove(vc, info, line + ycount, x, line, x, 1, 1617 s-start); 1618 console_conditional_schedule(); 1619 if (ycount > 0) 1620 line++; 1621 else { 1622 line--; 1623 /* NOTE: We subtract two lines from these pointers */ 1624 s -= vc->vc_size_row; 1625 d -= vc->vc_size_row; 1626 } 1627 } 1628 } 1629 1630 static void fbcon_redraw(struct vc_data *vc, struct fbcon_display *p, 1631 int line, int count, int offset) 1632 { 1633 unsigned short *d = (unsigned short *) 1634 (vc->vc_origin + vc->vc_size_row * line); 1635 unsigned short *s = d + offset; 1636 1637 while (count--) { 1638 unsigned short *start = s; 1639 unsigned short *le = advance_row(s, 1); 1640 unsigned short c; 1641 int x = 0; 1642 unsigned short attr = 1; 1643 1644 do { 1645 c = scr_readw(s); 1646 if (attr != (c & 0xff00)) { 1647 attr = c & 0xff00; 1648 if (s > start) { 1649 fbcon_putcs(vc, start, s - start, 1650 line, x); 1651 x += s - start; 1652 start = s; 1653 } 1654 } 1655 if (c == scr_readw(d)) { 1656 if (s > start) { 1657 fbcon_putcs(vc, start, s - start, 1658 line, x); 1659 x += s - start + 1; 1660 start = s + 1; 1661 } else { 1662 x++; 1663 start++; 1664 } 1665 } 1666 scr_writew(c, d); 1667 console_conditional_schedule(); 1668 s++; 1669 d++; 1670 } while (s < le); 1671 if (s > start) 1672 fbcon_putcs(vc, start, s - start, line, x); 1673 console_conditional_schedule(); 1674 if (offset > 0) 1675 line++; 1676 else { 1677 line--; 1678 /* NOTE: We subtract two lines from these pointers */ 1679 s -= vc->vc_size_row; 1680 d -= vc->vc_size_row; 1681 } 1682 } 1683 } 1684 1685 static bool fbcon_scroll(struct vc_data *vc, unsigned int t, unsigned int b, 1686 enum con_scroll dir, unsigned int count) 1687 { 1688 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1689 struct fbcon_display *p = &fb_display[vc->vc_num]; 1690 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK; 1691 1692 if (fbcon_is_inactive(vc, info)) 1693 return true; 1694 1695 fbcon_cursor(vc, CM_ERASE); 1696 1697 /* 1698 * ++Geert: Only use ywrap/ypan if the console is in text mode 1699 * ++Andrew: Only use ypan on hardware text mode when scrolling the 1700 * whole screen (prevents flicker). 1701 */ 1702 1703 switch (dir) { 1704 case SM_UP: 1705 if (count > vc->vc_rows) /* Maximum realistic size */ 1706 count = vc->vc_rows; 1707 if (logo_shown >= 0) 1708 goto redraw_up; 1709 switch (p->scrollmode) { 1710 case SCROLL_MOVE: 1711 fbcon_redraw_blit(vc, info, p, t, b - t - count, 1712 count); 1713 fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1714 scr_memsetw((unsigned short *) (vc->vc_origin + 1715 vc->vc_size_row * 1716 (b - count)), 1717 vc->vc_video_erase_char, 1718 vc->vc_size_row * count); 1719 return true; 1720 1721 case SCROLL_WRAP_MOVE: 1722 if (b - t - count > 3 * vc->vc_rows >> 2) { 1723 if (t > 0) 1724 fbcon_bmove(vc, 0, 0, count, 0, t, 1725 vc->vc_cols); 1726 ywrap_up(vc, count); 1727 if (vc->vc_rows - b > 0) 1728 fbcon_bmove(vc, b - count, 0, b, 0, 1729 vc->vc_rows - b, 1730 vc->vc_cols); 1731 } else if (info->flags & FBINFO_READS_FAST) 1732 fbcon_bmove(vc, t + count, 0, t, 0, 1733 b - t - count, vc->vc_cols); 1734 else 1735 goto redraw_up; 1736 fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1737 break; 1738 1739 case SCROLL_PAN_REDRAW: 1740 if ((p->yscroll + count <= 1741 2 * (p->vrows - vc->vc_rows)) 1742 && ((!scroll_partial && (b - t == vc->vc_rows)) 1743 || (scroll_partial 1744 && (b - t - count > 1745 3 * vc->vc_rows >> 2)))) { 1746 if (t > 0) 1747 fbcon_redraw_move(vc, p, 0, t, count); 1748 ypan_up_redraw(vc, t, count); 1749 if (vc->vc_rows - b > 0) 1750 fbcon_redraw_move(vc, p, b, 1751 vc->vc_rows - b, b); 1752 } else 1753 fbcon_redraw_move(vc, p, t + count, b - t - count, t); 1754 fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1755 break; 1756 1757 case SCROLL_PAN_MOVE: 1758 if ((p->yscroll + count <= 1759 2 * (p->vrows - vc->vc_rows)) 1760 && ((!scroll_partial && (b - t == vc->vc_rows)) 1761 || (scroll_partial 1762 && (b - t - count > 1763 3 * vc->vc_rows >> 2)))) { 1764 if (t > 0) 1765 fbcon_bmove(vc, 0, 0, count, 0, t, 1766 vc->vc_cols); 1767 ypan_up(vc, count); 1768 if (vc->vc_rows - b > 0) 1769 fbcon_bmove(vc, b - count, 0, b, 0, 1770 vc->vc_rows - b, 1771 vc->vc_cols); 1772 } else if (info->flags & FBINFO_READS_FAST) 1773 fbcon_bmove(vc, t + count, 0, t, 0, 1774 b - t - count, vc->vc_cols); 1775 else 1776 goto redraw_up; 1777 fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1778 break; 1779 1780 case SCROLL_REDRAW: 1781 redraw_up: 1782 fbcon_redraw(vc, p, t, b - t - count, 1783 count * vc->vc_cols); 1784 fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1785 scr_memsetw((unsigned short *) (vc->vc_origin + 1786 vc->vc_size_row * 1787 (b - count)), 1788 vc->vc_video_erase_char, 1789 vc->vc_size_row * count); 1790 return true; 1791 } 1792 break; 1793 1794 case SM_DOWN: 1795 if (count > vc->vc_rows) /* Maximum realistic size */ 1796 count = vc->vc_rows; 1797 if (logo_shown >= 0) 1798 goto redraw_down; 1799 switch (p->scrollmode) { 1800 case SCROLL_MOVE: 1801 fbcon_redraw_blit(vc, info, p, b - 1, b - t - count, 1802 -count); 1803 fbcon_clear(vc, t, 0, count, vc->vc_cols); 1804 scr_memsetw((unsigned short *) (vc->vc_origin + 1805 vc->vc_size_row * 1806 t), 1807 vc->vc_video_erase_char, 1808 vc->vc_size_row * count); 1809 return true; 1810 1811 case SCROLL_WRAP_MOVE: 1812 if (b - t - count > 3 * vc->vc_rows >> 2) { 1813 if (vc->vc_rows - b > 0) 1814 fbcon_bmove(vc, b, 0, b - count, 0, 1815 vc->vc_rows - b, 1816 vc->vc_cols); 1817 ywrap_down(vc, count); 1818 if (t > 0) 1819 fbcon_bmove(vc, count, 0, 0, 0, t, 1820 vc->vc_cols); 1821 } else if (info->flags & FBINFO_READS_FAST) 1822 fbcon_bmove(vc, t, 0, t + count, 0, 1823 b - t - count, vc->vc_cols); 1824 else 1825 goto redraw_down; 1826 fbcon_clear(vc, t, 0, count, vc->vc_cols); 1827 break; 1828 1829 case SCROLL_PAN_MOVE: 1830 if ((count - p->yscroll <= p->vrows - vc->vc_rows) 1831 && ((!scroll_partial && (b - t == vc->vc_rows)) 1832 || (scroll_partial 1833 && (b - t - count > 1834 3 * vc->vc_rows >> 2)))) { 1835 if (vc->vc_rows - b > 0) 1836 fbcon_bmove(vc, b, 0, b - count, 0, 1837 vc->vc_rows - b, 1838 vc->vc_cols); 1839 ypan_down(vc, count); 1840 if (t > 0) 1841 fbcon_bmove(vc, count, 0, 0, 0, t, 1842 vc->vc_cols); 1843 } else if (info->flags & FBINFO_READS_FAST) 1844 fbcon_bmove(vc, t, 0, t + count, 0, 1845 b - t - count, vc->vc_cols); 1846 else 1847 goto redraw_down; 1848 fbcon_clear(vc, t, 0, count, vc->vc_cols); 1849 break; 1850 1851 case SCROLL_PAN_REDRAW: 1852 if ((count - p->yscroll <= p->vrows - vc->vc_rows) 1853 && ((!scroll_partial && (b - t == vc->vc_rows)) 1854 || (scroll_partial 1855 && (b - t - count > 1856 3 * vc->vc_rows >> 2)))) { 1857 if (vc->vc_rows - b > 0) 1858 fbcon_redraw_move(vc, p, b, vc->vc_rows - b, 1859 b - count); 1860 ypan_down_redraw(vc, t, count); 1861 if (t > 0) 1862 fbcon_redraw_move(vc, p, count, t, 0); 1863 } else 1864 fbcon_redraw_move(vc, p, t, b - t - count, t + count); 1865 fbcon_clear(vc, t, 0, count, vc->vc_cols); 1866 break; 1867 1868 case SCROLL_REDRAW: 1869 redraw_down: 1870 fbcon_redraw(vc, p, b - 1, b - t - count, 1871 -count * vc->vc_cols); 1872 fbcon_clear(vc, t, 0, count, vc->vc_cols); 1873 scr_memsetw((unsigned short *) (vc->vc_origin + 1874 vc->vc_size_row * 1875 t), 1876 vc->vc_video_erase_char, 1877 vc->vc_size_row * count); 1878 return true; 1879 } 1880 } 1881 return false; 1882 } 1883 1884 1885 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx, 1886 int height, int width) 1887 { 1888 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1889 struct fbcon_display *p = &fb_display[vc->vc_num]; 1890 1891 if (fbcon_is_inactive(vc, info)) 1892 return; 1893 1894 if (!width || !height) 1895 return; 1896 1897 /* Split blits that cross physical y_wrap case. 1898 * Pathological case involves 4 blits, better to use recursive 1899 * code rather than unrolled case 1900 * 1901 * Recursive invocations don't need to erase the cursor over and 1902 * over again, so we use fbcon_bmove_rec() 1903 */ 1904 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width, 1905 p->vrows - p->yscroll); 1906 } 1907 1908 static void fbcon_bmove_rec(struct vc_data *vc, struct fbcon_display *p, int sy, int sx, 1909 int dy, int dx, int height, int width, u_int y_break) 1910 { 1911 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1912 struct fbcon_ops *ops = info->fbcon_par; 1913 u_int b; 1914 1915 if (sy < y_break && sy + height > y_break) { 1916 b = y_break - sy; 1917 if (dy < sy) { /* Avoid trashing self */ 1918 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1919 y_break); 1920 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1921 height - b, width, y_break); 1922 } else { 1923 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1924 height - b, width, y_break); 1925 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1926 y_break); 1927 } 1928 return; 1929 } 1930 1931 if (dy < y_break && dy + height > y_break) { 1932 b = y_break - dy; 1933 if (dy < sy) { /* Avoid trashing self */ 1934 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1935 y_break); 1936 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1937 height - b, width, y_break); 1938 } else { 1939 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1940 height - b, width, y_break); 1941 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1942 y_break); 1943 } 1944 return; 1945 } 1946 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx, 1947 height, width); 1948 } 1949 1950 static void updatescrollmode(struct fbcon_display *p, 1951 struct fb_info *info, 1952 struct vc_data *vc) 1953 { 1954 struct fbcon_ops *ops = info->fbcon_par; 1955 int fh = vc->vc_font.height; 1956 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 1957 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual, 1958 info->var.xres_virtual); 1959 1960 p->vrows = vyres/fh; 1961 if (yres > (fh * (vc->vc_rows + 1))) 1962 p->vrows -= (yres - (fh * vc->vc_rows)) / fh; 1963 if ((yres % fh) && (vyres % fh < yres % fh)) 1964 p->vrows--; 1965 } 1966 1967 #define PITCH(w) (((w) + 7) >> 3) 1968 #define CALC_FONTSZ(h, p, c) ((h) * (p) * (c)) /* size = height * pitch * charcount */ 1969 1970 static int fbcon_resize(struct vc_data *vc, unsigned int width, 1971 unsigned int height, unsigned int user) 1972 { 1973 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1974 struct fbcon_ops *ops = info->fbcon_par; 1975 struct fbcon_display *p = &fb_display[vc->vc_num]; 1976 struct fb_var_screeninfo var = info->var; 1977 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh; 1978 1979 if (p->userfont && FNTSIZE(vc->vc_font.data)) { 1980 int size; 1981 int pitch = PITCH(vc->vc_font.width); 1982 1983 /* 1984 * If user font, ensure that a possible change to user font 1985 * height or width will not allow a font data out-of-bounds access. 1986 * NOTE: must use original charcount in calculation as font 1987 * charcount can change and cannot be used to determine the 1988 * font data allocated size. 1989 */ 1990 if (pitch <= 0) 1991 return -EINVAL; 1992 size = CALC_FONTSZ(vc->vc_font.height, pitch, vc->vc_font.charcount); 1993 if (size > FNTSIZE(vc->vc_font.data)) 1994 return -EINVAL; 1995 } 1996 1997 virt_w = FBCON_SWAP(ops->rotate, width, height); 1998 virt_h = FBCON_SWAP(ops->rotate, height, width); 1999 virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width, 2000 vc->vc_font.height); 2001 virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height, 2002 vc->vc_font.width); 2003 var.xres = virt_w * virt_fw; 2004 var.yres = virt_h * virt_fh; 2005 x_diff = info->var.xres - var.xres; 2006 y_diff = info->var.yres - var.yres; 2007 if (x_diff < 0 || x_diff > virt_fw || 2008 y_diff < 0 || y_diff > virt_fh) { 2009 const struct fb_videomode *mode; 2010 2011 pr_debug("attempting resize %ix%i\n", var.xres, var.yres); 2012 mode = fb_find_best_mode(&var, &info->modelist); 2013 if (mode == NULL) 2014 return -EINVAL; 2015 display_to_var(&var, p); 2016 fb_videomode_to_var(&var, mode); 2017 2018 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh) 2019 return -EINVAL; 2020 2021 pr_debug("resize now %ix%i\n", var.xres, var.yres); 2022 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) { 2023 var.activate = FB_ACTIVATE_NOW | 2024 FB_ACTIVATE_FORCE; 2025 fb_set_var(info, &var); 2026 } 2027 var_to_display(p, &info->var, info); 2028 ops->var = info->var; 2029 } 2030 updatescrollmode(p, info, vc); 2031 return 0; 2032 } 2033 2034 static int fbcon_switch(struct vc_data *vc) 2035 { 2036 struct fb_info *info, *old_info = NULL; 2037 struct fbcon_ops *ops; 2038 struct fbcon_display *p = &fb_display[vc->vc_num]; 2039 struct fb_var_screeninfo var; 2040 int i, ret, prev_console; 2041 2042 info = registered_fb[con2fb_map[vc->vc_num]]; 2043 ops = info->fbcon_par; 2044 2045 if (logo_shown >= 0) { 2046 struct vc_data *conp2 = vc_cons[logo_shown].d; 2047 2048 if (conp2->vc_top == logo_lines 2049 && conp2->vc_bottom == conp2->vc_rows) 2050 conp2->vc_top = 0; 2051 logo_shown = FBCON_LOGO_CANSHOW; 2052 } 2053 2054 prev_console = ops->currcon; 2055 if (prev_console != -1) 2056 old_info = registered_fb[con2fb_map[prev_console]]; 2057 /* 2058 * FIXME: If we have multiple fbdev's loaded, we need to 2059 * update all info->currcon. Perhaps, we can place this 2060 * in a centralized structure, but this might break some 2061 * drivers. 2062 * 2063 * info->currcon = vc->vc_num; 2064 */ 2065 for_each_registered_fb(i) { 2066 if (registered_fb[i]->fbcon_par) { 2067 struct fbcon_ops *o = registered_fb[i]->fbcon_par; 2068 2069 o->currcon = vc->vc_num; 2070 } 2071 } 2072 memset(&var, 0, sizeof(struct fb_var_screeninfo)); 2073 display_to_var(&var, p); 2074 var.activate = FB_ACTIVATE_NOW; 2075 2076 /* 2077 * make sure we don't unnecessarily trip the memcmp() 2078 * in fb_set_var() 2079 */ 2080 info->var.activate = var.activate; 2081 var.vmode |= info->var.vmode & ~FB_VMODE_MASK; 2082 fb_set_var(info, &var); 2083 ops->var = info->var; 2084 2085 if (old_info != NULL && (old_info != info || 2086 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) { 2087 if (info->fbops->fb_set_par) { 2088 ret = info->fbops->fb_set_par(info); 2089 2090 if (ret) 2091 printk(KERN_ERR "fbcon_switch: detected " 2092 "unhandled fb_set_par error, " 2093 "error code %d\n", ret); 2094 } 2095 2096 if (old_info != info) 2097 fbcon_del_cursor_timer(old_info); 2098 } 2099 2100 if (fbcon_is_inactive(vc, info) || 2101 ops->blank_state != FB_BLANK_UNBLANK) 2102 fbcon_del_cursor_timer(info); 2103 else 2104 fbcon_add_cursor_timer(info); 2105 2106 set_blitting_type(vc, info); 2107 ops->cursor_reset = 1; 2108 2109 if (ops->rotate_font && ops->rotate_font(info, vc)) { 2110 ops->rotate = FB_ROTATE_UR; 2111 set_blitting_type(vc, info); 2112 } 2113 2114 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1); 2115 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 2116 2117 if (vc->vc_font.charcount > 256) 2118 vc->vc_complement_mask <<= 1; 2119 2120 updatescrollmode(p, info, vc); 2121 2122 switch (p->scrollmode) { 2123 case SCROLL_WRAP_MOVE: 2124 scrollback_phys_max = p->vrows - vc->vc_rows; 2125 break; 2126 case SCROLL_PAN_MOVE: 2127 case SCROLL_PAN_REDRAW: 2128 scrollback_phys_max = p->vrows - 2 * vc->vc_rows; 2129 if (scrollback_phys_max < 0) 2130 scrollback_phys_max = 0; 2131 break; 2132 default: 2133 scrollback_phys_max = 0; 2134 break; 2135 } 2136 2137 scrollback_max = 0; 2138 scrollback_current = 0; 2139 2140 if (!fbcon_is_inactive(vc, info)) { 2141 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0; 2142 ops->update_start(info); 2143 } 2144 2145 fbcon_set_palette(vc, color_table); 2146 fbcon_clear_margins(vc, 0); 2147 2148 if (logo_shown == FBCON_LOGO_DRAW) { 2149 2150 logo_shown = fg_console; 2151 /* This is protected above by initmem_freed */ 2152 fb_show_logo(info, ops->rotate); 2153 update_region(vc, 2154 vc->vc_origin + vc->vc_size_row * vc->vc_top, 2155 vc->vc_size_row * (vc->vc_bottom - 2156 vc->vc_top) / 2); 2157 return 0; 2158 } 2159 return 1; 2160 } 2161 2162 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info, 2163 int blank) 2164 { 2165 if (blank) { 2166 unsigned short charmask = vc->vc_hi_font_mask ? 2167 0x1ff : 0xff; 2168 unsigned short oldc; 2169 2170 oldc = vc->vc_video_erase_char; 2171 vc->vc_video_erase_char &= charmask; 2172 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols); 2173 vc->vc_video_erase_char = oldc; 2174 } 2175 } 2176 2177 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch) 2178 { 2179 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 2180 struct fbcon_ops *ops = info->fbcon_par; 2181 2182 if (mode_switch) { 2183 struct fb_var_screeninfo var = info->var; 2184 2185 ops->graphics = 1; 2186 2187 if (!blank) { 2188 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE | 2189 FB_ACTIVATE_KD_TEXT; 2190 fb_set_var(info, &var); 2191 ops->graphics = 0; 2192 ops->var = info->var; 2193 } 2194 } 2195 2196 if (!fbcon_is_inactive(vc, info)) { 2197 if (ops->blank_state != blank) { 2198 ops->blank_state = blank; 2199 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW); 2200 ops->cursor_flash = (!blank); 2201 2202 if (fb_blank(info, blank)) 2203 fbcon_generic_blank(vc, info, blank); 2204 } 2205 2206 if (!blank) 2207 update_screen(vc); 2208 } 2209 2210 if (mode_switch || fbcon_is_inactive(vc, info) || 2211 ops->blank_state != FB_BLANK_UNBLANK) 2212 fbcon_del_cursor_timer(info); 2213 else 2214 fbcon_add_cursor_timer(info); 2215 2216 return 0; 2217 } 2218 2219 static int fbcon_debug_enter(struct vc_data *vc) 2220 { 2221 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 2222 struct fbcon_ops *ops = info->fbcon_par; 2223 2224 ops->save_graphics = ops->graphics; 2225 ops->graphics = 0; 2226 if (info->fbops->fb_debug_enter) 2227 info->fbops->fb_debug_enter(info); 2228 fbcon_set_palette(vc, color_table); 2229 return 0; 2230 } 2231 2232 static int fbcon_debug_leave(struct vc_data *vc) 2233 { 2234 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 2235 struct fbcon_ops *ops = info->fbcon_par; 2236 2237 ops->graphics = ops->save_graphics; 2238 if (info->fbops->fb_debug_leave) 2239 info->fbops->fb_debug_leave(info); 2240 return 0; 2241 } 2242 2243 static int fbcon_get_font(struct vc_data *vc, struct console_font *font) 2244 { 2245 u8 *fontdata = vc->vc_font.data; 2246 u8 *data = font->data; 2247 int i, j; 2248 2249 font->width = vc->vc_font.width; 2250 font->height = vc->vc_font.height; 2251 font->charcount = vc->vc_hi_font_mask ? 512 : 256; 2252 if (!font->data) 2253 return 0; 2254 2255 if (font->width <= 8) { 2256 j = vc->vc_font.height; 2257 if (font->charcount * j > FNTSIZE(fontdata)) 2258 return -EINVAL; 2259 2260 for (i = 0; i < font->charcount; i++) { 2261 memcpy(data, fontdata, j); 2262 memset(data + j, 0, 32 - j); 2263 data += 32; 2264 fontdata += j; 2265 } 2266 } else if (font->width <= 16) { 2267 j = vc->vc_font.height * 2; 2268 if (font->charcount * j > FNTSIZE(fontdata)) 2269 return -EINVAL; 2270 2271 for (i = 0; i < font->charcount; i++) { 2272 memcpy(data, fontdata, j); 2273 memset(data + j, 0, 64 - j); 2274 data += 64; 2275 fontdata += j; 2276 } 2277 } else if (font->width <= 24) { 2278 if (font->charcount * (vc->vc_font.height * sizeof(u32)) > FNTSIZE(fontdata)) 2279 return -EINVAL; 2280 2281 for (i = 0; i < font->charcount; i++) { 2282 for (j = 0; j < vc->vc_font.height; j++) { 2283 *data++ = fontdata[0]; 2284 *data++ = fontdata[1]; 2285 *data++ = fontdata[2]; 2286 fontdata += sizeof(u32); 2287 } 2288 memset(data, 0, 3 * (32 - j)); 2289 data += 3 * (32 - j); 2290 } 2291 } else { 2292 j = vc->vc_font.height * 4; 2293 if (font->charcount * j > FNTSIZE(fontdata)) 2294 return -EINVAL; 2295 2296 for (i = 0; i < font->charcount; i++) { 2297 memcpy(data, fontdata, j); 2298 memset(data + j, 0, 128 - j); 2299 data += 128; 2300 fontdata += j; 2301 } 2302 } 2303 return 0; 2304 } 2305 2306 /* set/clear vc_hi_font_mask and update vc attrs accordingly */ 2307 static void set_vc_hi_font(struct vc_data *vc, bool set) 2308 { 2309 if (!set) { 2310 vc->vc_hi_font_mask = 0; 2311 if (vc->vc_can_do_color) { 2312 vc->vc_complement_mask >>= 1; 2313 vc->vc_s_complement_mask >>= 1; 2314 } 2315 2316 /* ++Edmund: reorder the attribute bits */ 2317 if (vc->vc_can_do_color) { 2318 unsigned short *cp = 2319 (unsigned short *) vc->vc_origin; 2320 int count = vc->vc_screenbuf_size / 2; 2321 unsigned short c; 2322 for (; count > 0; count--, cp++) { 2323 c = scr_readw(cp); 2324 scr_writew(((c & 0xfe00) >> 1) | 2325 (c & 0xff), cp); 2326 } 2327 c = vc->vc_video_erase_char; 2328 vc->vc_video_erase_char = 2329 ((c & 0xfe00) >> 1) | (c & 0xff); 2330 vc->vc_attr >>= 1; 2331 } 2332 } else { 2333 vc->vc_hi_font_mask = 0x100; 2334 if (vc->vc_can_do_color) { 2335 vc->vc_complement_mask <<= 1; 2336 vc->vc_s_complement_mask <<= 1; 2337 } 2338 2339 /* ++Edmund: reorder the attribute bits */ 2340 { 2341 unsigned short *cp = 2342 (unsigned short *) vc->vc_origin; 2343 int count = vc->vc_screenbuf_size / 2; 2344 unsigned short c; 2345 for (; count > 0; count--, cp++) { 2346 unsigned short newc; 2347 c = scr_readw(cp); 2348 if (vc->vc_can_do_color) 2349 newc = 2350 ((c & 0xff00) << 1) | (c & 2351 0xff); 2352 else 2353 newc = c & ~0x100; 2354 scr_writew(newc, cp); 2355 } 2356 c = vc->vc_video_erase_char; 2357 if (vc->vc_can_do_color) { 2358 vc->vc_video_erase_char = 2359 ((c & 0xff00) << 1) | (c & 0xff); 2360 vc->vc_attr <<= 1; 2361 } else 2362 vc->vc_video_erase_char = c & ~0x100; 2363 } 2364 } 2365 } 2366 2367 static int fbcon_do_set_font(struct vc_data *vc, int w, int h, int charcount, 2368 const u8 * data, int userfont) 2369 { 2370 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 2371 struct fbcon_ops *ops = info->fbcon_par; 2372 struct fbcon_display *p = &fb_display[vc->vc_num]; 2373 int resize; 2374 char *old_data = NULL; 2375 2376 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height); 2377 if (p->userfont) 2378 old_data = vc->vc_font.data; 2379 vc->vc_font.data = (void *)(p->fontdata = data); 2380 if ((p->userfont = userfont)) 2381 REFCOUNT(data)++; 2382 vc->vc_font.width = w; 2383 vc->vc_font.height = h; 2384 vc->vc_font.charcount = charcount; 2385 if (vc->vc_hi_font_mask && charcount == 256) 2386 set_vc_hi_font(vc, false); 2387 else if (!vc->vc_hi_font_mask && charcount == 512) 2388 set_vc_hi_font(vc, true); 2389 2390 if (resize) { 2391 int cols, rows; 2392 2393 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 2394 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 2395 cols /= w; 2396 rows /= h; 2397 vc_resize(vc, cols, rows); 2398 } else if (con_is_visible(vc) 2399 && vc->vc_mode == KD_TEXT) { 2400 fbcon_clear_margins(vc, 0); 2401 update_screen(vc); 2402 } 2403 2404 if (old_data && (--REFCOUNT(old_data) == 0)) 2405 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int)); 2406 return 0; 2407 } 2408 2409 /* 2410 * User asked to set font; we are guaranteed that 2411 * a) width and height are in range 1..32 2412 * b) charcount does not exceed 512 2413 * but lets not assume that, since someone might someday want to use larger 2414 * fonts. And charcount of 512 is small for unicode support. 2415 * 2416 * However, user space gives the font in 32 rows , regardless of 2417 * actual font height. So a new API is needed if support for larger fonts 2418 * is ever implemented. 2419 */ 2420 2421 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, 2422 unsigned int flags) 2423 { 2424 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 2425 unsigned charcount = font->charcount; 2426 int w = font->width; 2427 int h = font->height; 2428 int size; 2429 int i, csum; 2430 u8 *new_data, *data = font->data; 2431 int pitch = PITCH(font->width); 2432 2433 /* Is there a reason why fbconsole couldn't handle any charcount >256? 2434 * If not this check should be changed to charcount < 256 */ 2435 if (charcount != 256 && charcount != 512) 2436 return -EINVAL; 2437 2438 /* Make sure drawing engine can handle the font */ 2439 if (!(info->pixmap.blit_x & (1 << (font->width - 1))) || 2440 !(info->pixmap.blit_y & (1 << (font->height - 1)))) 2441 return -EINVAL; 2442 2443 /* Make sure driver can handle the font length */ 2444 if (fbcon_invalid_charcount(info, charcount)) 2445 return -EINVAL; 2446 2447 size = CALC_FONTSZ(h, pitch, charcount); 2448 2449 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER); 2450 2451 if (!new_data) 2452 return -ENOMEM; 2453 2454 memset(new_data, 0, FONT_EXTRA_WORDS * sizeof(int)); 2455 2456 new_data += FONT_EXTRA_WORDS * sizeof(int); 2457 FNTSIZE(new_data) = size; 2458 REFCOUNT(new_data) = 0; /* usage counter */ 2459 for (i=0; i< charcount; i++) { 2460 memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch); 2461 } 2462 2463 /* Since linux has a nice crc32 function use it for counting font 2464 * checksums. */ 2465 csum = crc32(0, new_data, size); 2466 2467 FNTSUM(new_data) = csum; 2468 /* Check if the same font is on some other console already */ 2469 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2470 struct vc_data *tmp = vc_cons[i].d; 2471 2472 if (fb_display[i].userfont && 2473 fb_display[i].fontdata && 2474 FNTSUM(fb_display[i].fontdata) == csum && 2475 FNTSIZE(fb_display[i].fontdata) == size && 2476 tmp->vc_font.width == w && 2477 !memcmp(fb_display[i].fontdata, new_data, size)) { 2478 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int)); 2479 new_data = (u8 *)fb_display[i].fontdata; 2480 break; 2481 } 2482 } 2483 return fbcon_do_set_font(vc, font->width, font->height, charcount, new_data, 1); 2484 } 2485 2486 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name) 2487 { 2488 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 2489 const struct font_desc *f; 2490 2491 if (!name) 2492 f = get_default_font(info->var.xres, info->var.yres, 2493 info->pixmap.blit_x, info->pixmap.blit_y); 2494 else if (!(f = find_font(name))) 2495 return -ENOENT; 2496 2497 font->width = f->width; 2498 font->height = f->height; 2499 return fbcon_do_set_font(vc, f->width, f->height, f->charcount, f->data, 0); 2500 } 2501 2502 static u16 palette_red[16]; 2503 static u16 palette_green[16]; 2504 static u16 palette_blue[16]; 2505 2506 static struct fb_cmap palette_cmap = { 2507 0, 16, palette_red, palette_green, palette_blue, NULL 2508 }; 2509 2510 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table) 2511 { 2512 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 2513 int i, j, k, depth; 2514 u8 val; 2515 2516 if (fbcon_is_inactive(vc, info)) 2517 return; 2518 2519 if (!con_is_visible(vc)) 2520 return; 2521 2522 depth = fb_get_color_depth(&info->var, &info->fix); 2523 if (depth > 3) { 2524 for (i = j = 0; i < 16; i++) { 2525 k = table[i]; 2526 val = vc->vc_palette[j++]; 2527 palette_red[k] = (val << 8) | val; 2528 val = vc->vc_palette[j++]; 2529 palette_green[k] = (val << 8) | val; 2530 val = vc->vc_palette[j++]; 2531 palette_blue[k] = (val << 8) | val; 2532 } 2533 palette_cmap.len = 16; 2534 palette_cmap.start = 0; 2535 /* 2536 * If framebuffer is capable of less than 16 colors, 2537 * use default palette of fbcon. 2538 */ 2539 } else 2540 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap); 2541 2542 fb_set_cmap(&palette_cmap, info); 2543 } 2544 2545 static u16 *fbcon_screen_pos(const struct vc_data *vc, int offset) 2546 { 2547 return (u16 *) (vc->vc_origin + offset); 2548 } 2549 2550 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos, 2551 int *px, int *py) 2552 { 2553 unsigned long ret; 2554 int x, y; 2555 2556 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) { 2557 unsigned long offset = (pos - vc->vc_origin) / 2; 2558 2559 x = offset % vc->vc_cols; 2560 y = offset / vc->vc_cols; 2561 ret = pos + (vc->vc_cols - x) * 2; 2562 } else { 2563 /* Should not happen */ 2564 x = y = 0; 2565 ret = vc->vc_origin; 2566 } 2567 if (px) 2568 *px = x; 2569 if (py) 2570 *py = y; 2571 return ret; 2572 } 2573 2574 /* As we might be inside of softback, we may work with non-contiguous buffer, 2575 that's why we have to use a separate routine. */ 2576 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt) 2577 { 2578 while (cnt--) { 2579 u16 a = scr_readw(p); 2580 if (!vc->vc_can_do_color) 2581 a ^= 0x0800; 2582 else if (vc->vc_hi_font_mask == 0x100) 2583 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | 2584 (((a) & 0x0e00) << 4); 2585 else 2586 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | 2587 (((a) & 0x0700) << 4); 2588 scr_writew(a, p++); 2589 } 2590 } 2591 2592 void fbcon_suspended(struct fb_info *info) 2593 { 2594 struct vc_data *vc = NULL; 2595 struct fbcon_ops *ops = info->fbcon_par; 2596 2597 if (!ops || ops->currcon < 0) 2598 return; 2599 vc = vc_cons[ops->currcon].d; 2600 2601 /* Clear cursor, restore saved data */ 2602 fbcon_cursor(vc, CM_ERASE); 2603 } 2604 2605 void fbcon_resumed(struct fb_info *info) 2606 { 2607 struct vc_data *vc; 2608 struct fbcon_ops *ops = info->fbcon_par; 2609 2610 if (!ops || ops->currcon < 0) 2611 return; 2612 vc = vc_cons[ops->currcon].d; 2613 2614 update_screen(vc); 2615 } 2616 2617 static void fbcon_modechanged(struct fb_info *info) 2618 { 2619 struct fbcon_ops *ops = info->fbcon_par; 2620 struct vc_data *vc; 2621 struct fbcon_display *p; 2622 int rows, cols; 2623 2624 if (!ops || ops->currcon < 0) 2625 return; 2626 vc = vc_cons[ops->currcon].d; 2627 if (vc->vc_mode != KD_TEXT || 2628 registered_fb[con2fb_map[ops->currcon]] != info) 2629 return; 2630 2631 p = &fb_display[vc->vc_num]; 2632 set_blitting_type(vc, info); 2633 2634 if (con_is_visible(vc)) { 2635 var_to_display(p, &info->var, info); 2636 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 2637 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 2638 cols /= vc->vc_font.width; 2639 rows /= vc->vc_font.height; 2640 vc_resize(vc, cols, rows); 2641 updatescrollmode(p, info, vc); 2642 scrollback_max = 0; 2643 scrollback_current = 0; 2644 2645 if (!fbcon_is_inactive(vc, info)) { 2646 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0; 2647 ops->update_start(info); 2648 } 2649 2650 fbcon_set_palette(vc, color_table); 2651 update_screen(vc); 2652 } 2653 } 2654 2655 static void fbcon_set_all_vcs(struct fb_info *info) 2656 { 2657 struct fbcon_ops *ops = info->fbcon_par; 2658 struct vc_data *vc; 2659 struct fbcon_display *p; 2660 int i, rows, cols, fg = -1; 2661 2662 if (!ops || ops->currcon < 0) 2663 return; 2664 2665 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2666 vc = vc_cons[i].d; 2667 if (!vc || vc->vc_mode != KD_TEXT || 2668 registered_fb[con2fb_map[i]] != info) 2669 continue; 2670 2671 if (con_is_visible(vc)) { 2672 fg = i; 2673 continue; 2674 } 2675 2676 p = &fb_display[vc->vc_num]; 2677 set_blitting_type(vc, info); 2678 var_to_display(p, &info->var, info); 2679 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 2680 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 2681 cols /= vc->vc_font.width; 2682 rows /= vc->vc_font.height; 2683 vc_resize(vc, cols, rows); 2684 } 2685 2686 if (fg != -1) 2687 fbcon_modechanged(info); 2688 } 2689 2690 2691 void fbcon_update_vcs(struct fb_info *info, bool all) 2692 { 2693 if (all) 2694 fbcon_set_all_vcs(info); 2695 else 2696 fbcon_modechanged(info); 2697 } 2698 EXPORT_SYMBOL(fbcon_update_vcs); 2699 2700 int fbcon_mode_deleted(struct fb_info *info, 2701 struct fb_videomode *mode) 2702 { 2703 struct fb_info *fb_info; 2704 struct fbcon_display *p; 2705 int i, j, found = 0; 2706 2707 /* before deletion, ensure that mode is not in use */ 2708 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2709 j = con2fb_map[i]; 2710 if (j == -1) 2711 continue; 2712 fb_info = registered_fb[j]; 2713 if (fb_info != info) 2714 continue; 2715 p = &fb_display[i]; 2716 if (!p || !p->mode) 2717 continue; 2718 if (fb_mode_is_equal(p->mode, mode)) { 2719 found = 1; 2720 break; 2721 } 2722 } 2723 return found; 2724 } 2725 2726 #ifdef CONFIG_VT_HW_CONSOLE_BINDING 2727 static void fbcon_unbind(void) 2728 { 2729 int ret; 2730 2731 ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc, 2732 fbcon_is_default); 2733 2734 if (!ret) 2735 fbcon_has_console_bind = 0; 2736 } 2737 #else 2738 static inline void fbcon_unbind(void) {} 2739 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */ 2740 2741 /* called with console_lock held */ 2742 void fbcon_fb_unbind(struct fb_info *info) 2743 { 2744 int i, new_idx = -1, ret = 0; 2745 int idx = info->node; 2746 2747 WARN_CONSOLE_UNLOCKED(); 2748 2749 if (!fbcon_has_console_bind) 2750 return; 2751 2752 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2753 if (con2fb_map[i] != idx && 2754 con2fb_map[i] != -1) { 2755 new_idx = con2fb_map[i]; 2756 break; 2757 } 2758 } 2759 2760 if (new_idx != -1) { 2761 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2762 if (con2fb_map[i] == idx) 2763 set_con2fb_map(i, new_idx, 0); 2764 } 2765 } else { 2766 struct fb_info *info = registered_fb[idx]; 2767 2768 /* This is sort of like set_con2fb_map, except it maps 2769 * the consoles to no device and then releases the 2770 * oldinfo to free memory and cancel the cursor blink 2771 * timer. I can imagine this just becoming part of 2772 * set_con2fb_map where new_idx is -1 2773 */ 2774 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2775 if (con2fb_map[i] == idx) { 2776 con2fb_map[i] = -1; 2777 if (!search_fb_in_map(idx)) { 2778 ret = con2fb_release_oldinfo(vc_cons[i].d, 2779 info, NULL, i, 2780 idx, 0); 2781 if (ret) { 2782 con2fb_map[i] = idx; 2783 return; 2784 } 2785 } 2786 } 2787 } 2788 fbcon_unbind(); 2789 } 2790 } 2791 2792 /* called with console_lock held */ 2793 void fbcon_fb_unregistered(struct fb_info *info) 2794 { 2795 int i, idx; 2796 2797 WARN_CONSOLE_UNLOCKED(); 2798 2799 if (deferred_takeover) 2800 return; 2801 2802 idx = info->node; 2803 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2804 if (con2fb_map[i] == idx) 2805 con2fb_map[i] = -1; 2806 } 2807 2808 if (idx == info_idx) { 2809 info_idx = -1; 2810 2811 for_each_registered_fb(i) { 2812 info_idx = i; 2813 break; 2814 } 2815 } 2816 2817 if (info_idx != -1) { 2818 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2819 if (con2fb_map[i] == -1) 2820 con2fb_map[i] = info_idx; 2821 } 2822 } 2823 2824 if (primary_device == idx) 2825 primary_device = -1; 2826 2827 if (!num_registered_fb) 2828 do_unregister_con_driver(&fb_con); 2829 } 2830 2831 void fbcon_remap_all(struct fb_info *info) 2832 { 2833 int i, idx = info->node; 2834 2835 console_lock(); 2836 if (deferred_takeover) { 2837 for (i = first_fb_vc; i <= last_fb_vc; i++) 2838 con2fb_map_boot[i] = idx; 2839 fbcon_map_override(); 2840 console_unlock(); 2841 return; 2842 } 2843 2844 for (i = first_fb_vc; i <= last_fb_vc; i++) 2845 set_con2fb_map(i, idx, 0); 2846 2847 if (con_is_bound(&fb_con)) { 2848 printk(KERN_INFO "fbcon: Remapping primary device, " 2849 "fb%i, to tty %i-%i\n", idx, 2850 first_fb_vc + 1, last_fb_vc + 1); 2851 info_idx = idx; 2852 } 2853 console_unlock(); 2854 } 2855 2856 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY 2857 static void fbcon_select_primary(struct fb_info *info) 2858 { 2859 if (!map_override && primary_device == -1 && 2860 fb_is_primary_device(info)) { 2861 int i; 2862 2863 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n", 2864 info->fix.id, info->node); 2865 primary_device = info->node; 2866 2867 for (i = first_fb_vc; i <= last_fb_vc; i++) 2868 con2fb_map_boot[i] = primary_device; 2869 2870 if (con_is_bound(&fb_con)) { 2871 printk(KERN_INFO "fbcon: Remapping primary device, " 2872 "fb%i, to tty %i-%i\n", info->node, 2873 first_fb_vc + 1, last_fb_vc + 1); 2874 info_idx = primary_device; 2875 } 2876 } 2877 2878 } 2879 #else 2880 static inline void fbcon_select_primary(struct fb_info *info) 2881 { 2882 return; 2883 } 2884 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */ 2885 2886 /* called with console_lock held */ 2887 int fbcon_fb_registered(struct fb_info *info) 2888 { 2889 int ret = 0, i, idx; 2890 2891 WARN_CONSOLE_UNLOCKED(); 2892 2893 idx = info->node; 2894 fbcon_select_primary(info); 2895 2896 if (deferred_takeover) { 2897 pr_info("fbcon: Deferring console take-over\n"); 2898 return 0; 2899 } 2900 2901 if (info_idx == -1) { 2902 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2903 if (con2fb_map_boot[i] == idx) { 2904 info_idx = idx; 2905 break; 2906 } 2907 } 2908 2909 if (info_idx != -1) 2910 ret = do_fbcon_takeover(1); 2911 } else { 2912 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2913 if (con2fb_map_boot[i] == idx) 2914 set_con2fb_map(i, idx, 0); 2915 } 2916 } 2917 2918 return ret; 2919 } 2920 2921 void fbcon_fb_blanked(struct fb_info *info, int blank) 2922 { 2923 struct fbcon_ops *ops = info->fbcon_par; 2924 struct vc_data *vc; 2925 2926 if (!ops || ops->currcon < 0) 2927 return; 2928 2929 vc = vc_cons[ops->currcon].d; 2930 if (vc->vc_mode != KD_TEXT || 2931 registered_fb[con2fb_map[ops->currcon]] != info) 2932 return; 2933 2934 if (con_is_visible(vc)) { 2935 if (blank) 2936 do_blank_screen(0); 2937 else 2938 do_unblank_screen(0); 2939 } 2940 ops->blank_state = blank; 2941 } 2942 2943 void fbcon_new_modelist(struct fb_info *info) 2944 { 2945 int i; 2946 struct vc_data *vc; 2947 struct fb_var_screeninfo var; 2948 const struct fb_videomode *mode; 2949 2950 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2951 if (registered_fb[con2fb_map[i]] != info) 2952 continue; 2953 if (!fb_display[i].mode) 2954 continue; 2955 vc = vc_cons[i].d; 2956 display_to_var(&var, &fb_display[i]); 2957 mode = fb_find_nearest_mode(fb_display[i].mode, 2958 &info->modelist); 2959 fb_videomode_to_var(&var, mode); 2960 fbcon_set_disp(info, &var, vc->vc_num); 2961 } 2962 } 2963 2964 void fbcon_get_requirement(struct fb_info *info, 2965 struct fb_blit_caps *caps) 2966 { 2967 struct vc_data *vc; 2968 2969 if (caps->flags) { 2970 int i, charcnt; 2971 2972 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2973 vc = vc_cons[i].d; 2974 if (vc && vc->vc_mode == KD_TEXT && 2975 info->node == con2fb_map[i]) { 2976 caps->x |= 1 << (vc->vc_font.width - 1); 2977 caps->y |= 1 << (vc->vc_font.height - 1); 2978 charcnt = vc->vc_font.charcount; 2979 if (caps->len < charcnt) 2980 caps->len = charcnt; 2981 } 2982 } 2983 } else { 2984 vc = vc_cons[fg_console].d; 2985 2986 if (vc && vc->vc_mode == KD_TEXT && 2987 info->node == con2fb_map[fg_console]) { 2988 caps->x = 1 << (vc->vc_font.width - 1); 2989 caps->y = 1 << (vc->vc_font.height - 1); 2990 caps->len = vc->vc_font.charcount; 2991 } 2992 } 2993 } 2994 2995 int fbcon_set_con2fb_map_ioctl(void __user *argp) 2996 { 2997 struct fb_con2fbmap con2fb; 2998 int ret; 2999 3000 if (copy_from_user(&con2fb, argp, sizeof(con2fb))) 3001 return -EFAULT; 3002 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) 3003 return -EINVAL; 3004 if (con2fb.framebuffer >= FB_MAX) 3005 return -EINVAL; 3006 if (!registered_fb[con2fb.framebuffer]) 3007 request_module("fb%d", con2fb.framebuffer); 3008 if (!registered_fb[con2fb.framebuffer]) { 3009 return -EINVAL; 3010 } 3011 3012 console_lock(); 3013 ret = set_con2fb_map(con2fb.console - 1, 3014 con2fb.framebuffer, 1); 3015 console_unlock(); 3016 3017 return ret; 3018 } 3019 3020 int fbcon_get_con2fb_map_ioctl(void __user *argp) 3021 { 3022 struct fb_con2fbmap con2fb; 3023 3024 if (copy_from_user(&con2fb, argp, sizeof(con2fb))) 3025 return -EFAULT; 3026 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) 3027 return -EINVAL; 3028 3029 console_lock(); 3030 con2fb.framebuffer = con2fb_map[con2fb.console - 1]; 3031 console_unlock(); 3032 3033 return copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0; 3034 } 3035 3036 /* 3037 * The console `switch' structure for the frame buffer based console 3038 */ 3039 3040 static const struct consw fb_con = { 3041 .owner = THIS_MODULE, 3042 .con_startup = fbcon_startup, 3043 .con_init = fbcon_init, 3044 .con_deinit = fbcon_deinit, 3045 .con_clear = fbcon_clear, 3046 .con_putc = fbcon_putc, 3047 .con_putcs = fbcon_putcs, 3048 .con_cursor = fbcon_cursor, 3049 .con_scroll = fbcon_scroll, 3050 .con_switch = fbcon_switch, 3051 .con_blank = fbcon_blank, 3052 .con_font_set = fbcon_set_font, 3053 .con_font_get = fbcon_get_font, 3054 .con_font_default = fbcon_set_def_font, 3055 .con_set_palette = fbcon_set_palette, 3056 .con_invert_region = fbcon_invert_region, 3057 .con_screen_pos = fbcon_screen_pos, 3058 .con_getxy = fbcon_getxy, 3059 .con_resize = fbcon_resize, 3060 .con_debug_enter = fbcon_debug_enter, 3061 .con_debug_leave = fbcon_debug_leave, 3062 }; 3063 3064 static ssize_t store_rotate(struct device *device, 3065 struct device_attribute *attr, const char *buf, 3066 size_t count) 3067 { 3068 struct fb_info *info; 3069 int rotate, idx; 3070 char **last = NULL; 3071 3072 console_lock(); 3073 idx = con2fb_map[fg_console]; 3074 3075 if (idx == -1 || registered_fb[idx] == NULL) 3076 goto err; 3077 3078 info = registered_fb[idx]; 3079 rotate = simple_strtoul(buf, last, 0); 3080 fbcon_rotate(info, rotate); 3081 err: 3082 console_unlock(); 3083 return count; 3084 } 3085 3086 static ssize_t store_rotate_all(struct device *device, 3087 struct device_attribute *attr,const char *buf, 3088 size_t count) 3089 { 3090 struct fb_info *info; 3091 int rotate, idx; 3092 char **last = NULL; 3093 3094 console_lock(); 3095 idx = con2fb_map[fg_console]; 3096 3097 if (idx == -1 || registered_fb[idx] == NULL) 3098 goto err; 3099 3100 info = registered_fb[idx]; 3101 rotate = simple_strtoul(buf, last, 0); 3102 fbcon_rotate_all(info, rotate); 3103 err: 3104 console_unlock(); 3105 return count; 3106 } 3107 3108 static ssize_t show_rotate(struct device *device, 3109 struct device_attribute *attr,char *buf) 3110 { 3111 struct fb_info *info; 3112 int rotate = 0, idx; 3113 3114 console_lock(); 3115 idx = con2fb_map[fg_console]; 3116 3117 if (idx == -1 || registered_fb[idx] == NULL) 3118 goto err; 3119 3120 info = registered_fb[idx]; 3121 rotate = fbcon_get_rotate(info); 3122 err: 3123 console_unlock(); 3124 return snprintf(buf, PAGE_SIZE, "%d\n", rotate); 3125 } 3126 3127 static ssize_t show_cursor_blink(struct device *device, 3128 struct device_attribute *attr, char *buf) 3129 { 3130 struct fb_info *info; 3131 struct fbcon_ops *ops; 3132 int idx, blink = -1; 3133 3134 console_lock(); 3135 idx = con2fb_map[fg_console]; 3136 3137 if (idx == -1 || registered_fb[idx] == NULL) 3138 goto err; 3139 3140 info = registered_fb[idx]; 3141 ops = info->fbcon_par; 3142 3143 if (!ops) 3144 goto err; 3145 3146 blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0; 3147 err: 3148 console_unlock(); 3149 return snprintf(buf, PAGE_SIZE, "%d\n", blink); 3150 } 3151 3152 static ssize_t store_cursor_blink(struct device *device, 3153 struct device_attribute *attr, 3154 const char *buf, size_t count) 3155 { 3156 struct fb_info *info; 3157 int blink, idx; 3158 char **last = NULL; 3159 3160 console_lock(); 3161 idx = con2fb_map[fg_console]; 3162 3163 if (idx == -1 || registered_fb[idx] == NULL) 3164 goto err; 3165 3166 info = registered_fb[idx]; 3167 3168 if (!info->fbcon_par) 3169 goto err; 3170 3171 blink = simple_strtoul(buf, last, 0); 3172 3173 if (blink) { 3174 fbcon_cursor_noblink = 0; 3175 fbcon_add_cursor_timer(info); 3176 } else { 3177 fbcon_cursor_noblink = 1; 3178 fbcon_del_cursor_timer(info); 3179 } 3180 3181 err: 3182 console_unlock(); 3183 return count; 3184 } 3185 3186 static struct device_attribute device_attrs[] = { 3187 __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate), 3188 __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all), 3189 __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink, 3190 store_cursor_blink), 3191 }; 3192 3193 static int fbcon_init_device(void) 3194 { 3195 int i, error = 0; 3196 3197 fbcon_has_sysfs = 1; 3198 3199 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) { 3200 error = device_create_file(fbcon_device, &device_attrs[i]); 3201 3202 if (error) 3203 break; 3204 } 3205 3206 if (error) { 3207 while (--i >= 0) 3208 device_remove_file(fbcon_device, &device_attrs[i]); 3209 3210 fbcon_has_sysfs = 0; 3211 } 3212 3213 return 0; 3214 } 3215 3216 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 3217 static void fbcon_register_existing_fbs(struct work_struct *work) 3218 { 3219 int i; 3220 3221 console_lock(); 3222 3223 for_each_registered_fb(i) 3224 fbcon_fb_registered(registered_fb[i]); 3225 3226 console_unlock(); 3227 } 3228 3229 static struct notifier_block fbcon_output_nb; 3230 static DECLARE_WORK(fbcon_deferred_takeover_work, fbcon_register_existing_fbs); 3231 3232 static int fbcon_output_notifier(struct notifier_block *nb, 3233 unsigned long action, void *data) 3234 { 3235 WARN_CONSOLE_UNLOCKED(); 3236 3237 pr_info("fbcon: Taking over console\n"); 3238 3239 dummycon_unregister_output_notifier(&fbcon_output_nb); 3240 deferred_takeover = false; 3241 logo_shown = FBCON_LOGO_DONTSHOW; 3242 3243 /* We may get called in atomic context */ 3244 schedule_work(&fbcon_deferred_takeover_work); 3245 3246 return NOTIFY_OK; 3247 } 3248 #endif 3249 3250 static void fbcon_start(void) 3251 { 3252 WARN_CONSOLE_UNLOCKED(); 3253 3254 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 3255 if (conswitchp != &dummy_con) 3256 deferred_takeover = false; 3257 3258 if (deferred_takeover) { 3259 fbcon_output_nb.notifier_call = fbcon_output_notifier; 3260 dummycon_register_output_notifier(&fbcon_output_nb); 3261 return; 3262 } 3263 #endif 3264 3265 if (num_registered_fb) { 3266 int i; 3267 3268 for_each_registered_fb(i) { 3269 info_idx = i; 3270 break; 3271 } 3272 3273 do_fbcon_takeover(0); 3274 } 3275 } 3276 3277 static void fbcon_exit(void) 3278 { 3279 struct fb_info *info; 3280 int i, j, mapped; 3281 3282 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 3283 if (deferred_takeover) { 3284 dummycon_unregister_output_notifier(&fbcon_output_nb); 3285 deferred_takeover = false; 3286 } 3287 #endif 3288 3289 for_each_registered_fb(i) { 3290 int pending = 0; 3291 3292 mapped = 0; 3293 info = registered_fb[i]; 3294 3295 if (info->queue.func) 3296 pending = cancel_work_sync(&info->queue); 3297 pr_debug("fbcon: %s pending work\n", (pending ? "canceled" : "no")); 3298 3299 for (j = first_fb_vc; j <= last_fb_vc; j++) { 3300 if (con2fb_map[j] == i) { 3301 mapped = 1; 3302 con2fb_map[j] = -1; 3303 } 3304 } 3305 3306 if (mapped) { 3307 if (info->fbops->fb_release) 3308 info->fbops->fb_release(info, 0); 3309 module_put(info->fbops->owner); 3310 3311 if (info->fbcon_par) { 3312 struct fbcon_ops *ops = info->fbcon_par; 3313 3314 fbcon_del_cursor_timer(info); 3315 kfree(ops->cursor_src); 3316 kfree(ops->cursor_state.mask); 3317 kfree(info->fbcon_par); 3318 info->fbcon_par = NULL; 3319 } 3320 3321 if (info->queue.func == fb_flashcursor) 3322 info->queue.func = NULL; 3323 } 3324 } 3325 } 3326 3327 void __init fb_console_init(void) 3328 { 3329 int i; 3330 3331 console_lock(); 3332 fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL, 3333 "fbcon"); 3334 3335 if (IS_ERR(fbcon_device)) { 3336 printk(KERN_WARNING "Unable to create device " 3337 "for fbcon; errno = %ld\n", 3338 PTR_ERR(fbcon_device)); 3339 fbcon_device = NULL; 3340 } else 3341 fbcon_init_device(); 3342 3343 for (i = 0; i < MAX_NR_CONSOLES; i++) 3344 con2fb_map[i] = -1; 3345 3346 fbcon_start(); 3347 console_unlock(); 3348 } 3349 3350 #ifdef MODULE 3351 3352 static void __exit fbcon_deinit_device(void) 3353 { 3354 int i; 3355 3356 if (fbcon_has_sysfs) { 3357 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) 3358 device_remove_file(fbcon_device, &device_attrs[i]); 3359 3360 fbcon_has_sysfs = 0; 3361 } 3362 } 3363 3364 void __exit fb_console_exit(void) 3365 { 3366 console_lock(); 3367 fbcon_deinit_device(); 3368 device_destroy(fb_class, MKDEV(0, 0)); 3369 fbcon_exit(); 3370 do_unregister_con_driver(&fb_con); 3371 console_unlock(); 3372 } 3373 #endif 3374