1 /* 2 * linux/drivers/video/fbcon.c -- Low level frame buffer based console driver 3 * 4 * Copyright (C) 1995 Geert Uytterhoeven 5 * 6 * 7 * This file is based on the original Amiga console driver (amicon.c): 8 * 9 * Copyright (C) 1993 Hamish Macdonald 10 * Greg Harp 11 * Copyright (C) 1994 David Carter [carter@compsci.bristol.ac.uk] 12 * 13 * with work by William Rucklidge (wjr@cs.cornell.edu) 14 * Geert Uytterhoeven 15 * Jes Sorensen (jds@kom.auc.dk) 16 * Martin Apel 17 * 18 * and on the original Atari console driver (atacon.c): 19 * 20 * Copyright (C) 1993 Bjoern Brauel 21 * Roman Hodek 22 * 23 * with work by Guenther Kelleter 24 * Martin Schaller 25 * Andreas Schwab 26 * 27 * Hardware cursor support added by Emmanuel Marty (core@ggi-project.org) 28 * Smart redraw scrolling, arbitrary font width support, 512char font support 29 * and software scrollback added by 30 * Jakub Jelinek (jj@ultra.linux.cz) 31 * 32 * Random hacking by Martin Mares <mj@ucw.cz> 33 * 34 * 2001 - Documented with DocBook 35 * - Brad Douglas <brad@neruo.com> 36 * 37 * The low level operations for the various display memory organizations are 38 * now in separate source files. 39 * 40 * Currently the following organizations are supported: 41 * 42 * o afb Amiga bitplanes 43 * o cfb{2,4,8,16,24,32} Packed pixels 44 * o ilbm Amiga interleaved bitplanes 45 * o iplan2p[248] Atari interleaved bitplanes 46 * o mfb Monochrome 47 * o vga VGA characters/attributes 48 * 49 * To do: 50 * 51 * - Implement 16 plane mode (iplan2p16) 52 * 53 * 54 * This file is subject to the terms and conditions of the GNU General Public 55 * License. See the file COPYING in the main directory of this archive for 56 * more details. 57 */ 58 59 #undef FBCONDEBUG 60 61 #include <linux/module.h> 62 #include <linux/types.h> 63 #include <linux/fs.h> 64 #include <linux/kernel.h> 65 #include <linux/delay.h> /* MSch: for IRQ probe */ 66 #include <linux/console.h> 67 #include <linux/string.h> 68 #include <linux/kd.h> 69 #include <linux/slab.h> 70 #include <linux/fb.h> 71 #include <linux/fbcon.h> 72 #include <linux/vt_kern.h> 73 #include <linux/selection.h> 74 #include <linux/font.h> 75 #include <linux/smp.h> 76 #include <linux/init.h> 77 #include <linux/interrupt.h> 78 #include <linux/crc32.h> /* For counting font checksums */ 79 #include <linux/uaccess.h> 80 #include <asm/fb.h> 81 #include <asm/irq.h> 82 83 #include "fbcon.h" 84 85 #ifdef FBCONDEBUG 86 # define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __func__ , ## args) 87 #else 88 # define DPRINTK(fmt, args...) 89 #endif 90 91 /* 92 * FIXME: Locking 93 * 94 * - fbcon state itself is protected by the console_lock, and the code does a 95 * pretty good job at making sure that lock is held everywhere it's needed. 96 * 97 * - access to the registered_fb array is entirely unprotected. This should use 98 * proper object lifetime handling, i.e. get/put_fb_info. This also means 99 * switching from indices to proper pointers for fb_info everywhere. 100 * 101 * - fbcon doesn't bother with fb_lock/unlock at all. This is buggy, since it 102 * means concurrent access to the same fbdev from both fbcon and userspace 103 * will blow up. To fix this all fbcon calls from fbmem.c need to be moved out 104 * of fb_lock/unlock protected sections, since otherwise we'll recurse and 105 * deadlock eventually. Aside: Due to these deadlock issues the fbdev code in 106 * fbmem.c cannot use locking asserts, and there's lots of callers which get 107 * the rules wrong, e.g. fbsysfs.c entirely missed fb_lock/unlock calls too. 108 */ 109 110 enum { 111 FBCON_LOGO_CANSHOW = -1, /* the logo can be shown */ 112 FBCON_LOGO_DRAW = -2, /* draw the logo to a console */ 113 FBCON_LOGO_DONTSHOW = -3 /* do not show the logo */ 114 }; 115 116 static struct fbcon_display fb_display[MAX_NR_CONSOLES]; 117 118 static signed char con2fb_map[MAX_NR_CONSOLES]; 119 static signed char con2fb_map_boot[MAX_NR_CONSOLES]; 120 121 static int logo_lines; 122 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO 123 enums. */ 124 static int logo_shown = FBCON_LOGO_CANSHOW; 125 /* console mappings */ 126 static int first_fb_vc; 127 static int last_fb_vc = MAX_NR_CONSOLES - 1; 128 static int fbcon_is_default = 1; 129 static int primary_device = -1; 130 static int fbcon_has_console_bind; 131 132 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY 133 static int map_override; 134 135 static inline void fbcon_map_override(void) 136 { 137 map_override = 1; 138 } 139 #else 140 static inline void fbcon_map_override(void) 141 { 142 } 143 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY */ 144 145 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 146 static bool deferred_takeover = true; 147 #else 148 #define deferred_takeover false 149 #endif 150 151 /* font data */ 152 static char fontname[40]; 153 154 /* current fb_info */ 155 static int info_idx = -1; 156 157 /* console rotation */ 158 static int initial_rotation = -1; 159 static int fbcon_has_sysfs; 160 static int margin_color; 161 162 static const struct consw fb_con; 163 164 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row) 165 166 static int fbcon_cursor_noblink; 167 168 #define divides(a, b) ((!(a) || (b)%(a)) ? 0 : 1) 169 170 /* 171 * Interface used by the world 172 */ 173 174 static const char *fbcon_startup(void); 175 static void fbcon_init(struct vc_data *vc, int init); 176 static void fbcon_deinit(struct vc_data *vc); 177 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height, 178 int width); 179 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos); 180 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s, 181 int count, int ypos, int xpos); 182 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only); 183 static void fbcon_cursor(struct vc_data *vc, int mode); 184 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx, 185 int height, int width); 186 static int fbcon_switch(struct vc_data *vc); 187 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch); 188 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table); 189 190 /* 191 * Internal routines 192 */ 193 static __inline__ void ywrap_up(struct vc_data *vc, int count); 194 static __inline__ void ywrap_down(struct vc_data *vc, int count); 195 static __inline__ void ypan_up(struct vc_data *vc, int count); 196 static __inline__ void ypan_down(struct vc_data *vc, int count); 197 static void fbcon_bmove_rec(struct vc_data *vc, struct fbcon_display *p, int sy, int sx, 198 int dy, int dx, int height, int width, u_int y_break); 199 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var, 200 int unit); 201 static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p, 202 int line, int count, int dy); 203 static void fbcon_modechanged(struct fb_info *info); 204 static void fbcon_set_all_vcs(struct fb_info *info); 205 static void fbcon_start(void); 206 static void fbcon_exit(void); 207 static struct device *fbcon_device; 208 209 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION 210 static inline void fbcon_set_rotation(struct fb_info *info) 211 { 212 struct fbcon_ops *ops = info->fbcon_par; 213 214 if (!(info->flags & FBINFO_MISC_TILEBLITTING) && 215 ops->p->con_rotate < 4) 216 ops->rotate = ops->p->con_rotate; 217 else 218 ops->rotate = 0; 219 } 220 221 static void fbcon_rotate(struct fb_info *info, u32 rotate) 222 { 223 struct fbcon_ops *ops= info->fbcon_par; 224 struct fb_info *fb_info; 225 226 if (!ops || ops->currcon == -1) 227 return; 228 229 fb_info = registered_fb[con2fb_map[ops->currcon]]; 230 231 if (info == fb_info) { 232 struct fbcon_display *p = &fb_display[ops->currcon]; 233 234 if (rotate < 4) 235 p->con_rotate = rotate; 236 else 237 p->con_rotate = 0; 238 239 fbcon_modechanged(info); 240 } 241 } 242 243 static void fbcon_rotate_all(struct fb_info *info, u32 rotate) 244 { 245 struct fbcon_ops *ops = info->fbcon_par; 246 struct vc_data *vc; 247 struct fbcon_display *p; 248 int i; 249 250 if (!ops || ops->currcon < 0 || rotate > 3) 251 return; 252 253 for (i = first_fb_vc; i <= last_fb_vc; i++) { 254 vc = vc_cons[i].d; 255 if (!vc || vc->vc_mode != KD_TEXT || 256 registered_fb[con2fb_map[i]] != info) 257 continue; 258 259 p = &fb_display[vc->vc_num]; 260 p->con_rotate = rotate; 261 } 262 263 fbcon_set_all_vcs(info); 264 } 265 #else 266 static inline void fbcon_set_rotation(struct fb_info *info) 267 { 268 struct fbcon_ops *ops = info->fbcon_par; 269 270 ops->rotate = FB_ROTATE_UR; 271 } 272 273 static void fbcon_rotate(struct fb_info *info, u32 rotate) 274 { 275 return; 276 } 277 278 static void fbcon_rotate_all(struct fb_info *info, u32 rotate) 279 { 280 return; 281 } 282 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */ 283 284 static int fbcon_get_rotate(struct fb_info *info) 285 { 286 struct fbcon_ops *ops = info->fbcon_par; 287 288 return (ops) ? ops->rotate : 0; 289 } 290 291 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info) 292 { 293 struct fbcon_ops *ops = info->fbcon_par; 294 295 return (info->state != FBINFO_STATE_RUNNING || 296 vc->vc_mode != KD_TEXT || ops->graphics); 297 } 298 299 static int get_color(struct vc_data *vc, struct fb_info *info, 300 u16 c, int is_fg) 301 { 302 int depth = fb_get_color_depth(&info->var, &info->fix); 303 int color = 0; 304 305 if (console_blanked) { 306 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff; 307 308 c = vc->vc_video_erase_char & charmask; 309 } 310 311 if (depth != 1) 312 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c) 313 : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c); 314 315 switch (depth) { 316 case 1: 317 { 318 int col = mono_col(info); 319 /* 0 or 1 */ 320 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0; 321 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col; 322 323 if (console_blanked) 324 fg = bg; 325 326 color = (is_fg) ? fg : bg; 327 break; 328 } 329 case 2: 330 /* 331 * Scale down 16-colors to 4 colors. Default 4-color palette 332 * is grayscale. However, simply dividing the values by 4 333 * will not work, as colors 1, 2 and 3 will be scaled-down 334 * to zero rendering them invisible. So empirically convert 335 * colors to a sane 4-level grayscale. 336 */ 337 switch (color) { 338 case 0: 339 color = 0; /* black */ 340 break; 341 case 1 ... 6: 342 color = 2; /* white */ 343 break; 344 case 7 ... 8: 345 color = 1; /* gray */ 346 break; 347 default: 348 color = 3; /* intense white */ 349 break; 350 } 351 break; 352 case 3: 353 /* 354 * Last 8 entries of default 16-color palette is a more intense 355 * version of the first 8 (i.e., same chrominance, different 356 * luminance). 357 */ 358 color &= 7; 359 break; 360 } 361 362 363 return color; 364 } 365 366 static void fb_flashcursor(struct work_struct *work) 367 { 368 struct fb_info *info = container_of(work, struct fb_info, queue); 369 struct fbcon_ops *ops = info->fbcon_par; 370 struct vc_data *vc = NULL; 371 int c; 372 int mode; 373 int ret; 374 375 /* FIXME: we should sort out the unbind locking instead */ 376 /* instead we just fail to flash the cursor if we can't get 377 * the lock instead of blocking fbcon deinit */ 378 ret = console_trylock(); 379 if (ret == 0) 380 return; 381 382 if (ops && ops->currcon != -1) 383 vc = vc_cons[ops->currcon].d; 384 385 if (!vc || !con_is_visible(vc) || 386 registered_fb[con2fb_map[vc->vc_num]] != info || 387 vc->vc_deccm != 1) { 388 console_unlock(); 389 return; 390 } 391 392 c = scr_readw((u16 *) vc->vc_pos); 393 mode = (!ops->cursor_flash || ops->cursor_state.enable) ? 394 CM_ERASE : CM_DRAW; 395 ops->cursor(vc, info, mode, get_color(vc, info, c, 1), 396 get_color(vc, info, c, 0)); 397 console_unlock(); 398 } 399 400 static void cursor_timer_handler(struct timer_list *t) 401 { 402 struct fbcon_ops *ops = from_timer(ops, t, cursor_timer); 403 struct fb_info *info = ops->info; 404 405 queue_work(system_power_efficient_wq, &info->queue); 406 mod_timer(&ops->cursor_timer, jiffies + ops->cur_blink_jiffies); 407 } 408 409 static void fbcon_add_cursor_timer(struct fb_info *info) 410 { 411 struct fbcon_ops *ops = info->fbcon_par; 412 413 if ((!info->queue.func || info->queue.func == fb_flashcursor) && 414 !(ops->flags & FBCON_FLAGS_CURSOR_TIMER) && 415 !fbcon_cursor_noblink) { 416 if (!info->queue.func) 417 INIT_WORK(&info->queue, fb_flashcursor); 418 419 timer_setup(&ops->cursor_timer, cursor_timer_handler, 0); 420 mod_timer(&ops->cursor_timer, jiffies + ops->cur_blink_jiffies); 421 ops->flags |= FBCON_FLAGS_CURSOR_TIMER; 422 } 423 } 424 425 static void fbcon_del_cursor_timer(struct fb_info *info) 426 { 427 struct fbcon_ops *ops = info->fbcon_par; 428 429 if (info->queue.func == fb_flashcursor && 430 ops->flags & FBCON_FLAGS_CURSOR_TIMER) { 431 del_timer_sync(&ops->cursor_timer); 432 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER; 433 } 434 } 435 436 #ifndef MODULE 437 static int __init fb_console_setup(char *this_opt) 438 { 439 char *options; 440 int i, j; 441 442 if (!this_opt || !*this_opt) 443 return 1; 444 445 while ((options = strsep(&this_opt, ",")) != NULL) { 446 if (!strncmp(options, "font:", 5)) { 447 strlcpy(fontname, options + 5, sizeof(fontname)); 448 continue; 449 } 450 451 if (!strncmp(options, "scrollback:", 11)) { 452 pr_warn("Ignoring scrollback size option\n"); 453 continue; 454 } 455 456 if (!strncmp(options, "map:", 4)) { 457 options += 4; 458 if (*options) { 459 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) { 460 if (!options[j]) 461 j = 0; 462 con2fb_map_boot[i] = 463 (options[j++]-'0') % FB_MAX; 464 } 465 466 fbcon_map_override(); 467 } 468 continue; 469 } 470 471 if (!strncmp(options, "vc:", 3)) { 472 options += 3; 473 if (*options) 474 first_fb_vc = simple_strtoul(options, &options, 10) - 1; 475 if (first_fb_vc < 0) 476 first_fb_vc = 0; 477 if (*options++ == '-') 478 last_fb_vc = simple_strtoul(options, &options, 10) - 1; 479 fbcon_is_default = 0; 480 continue; 481 } 482 483 if (!strncmp(options, "rotate:", 7)) { 484 options += 7; 485 if (*options) 486 initial_rotation = simple_strtoul(options, &options, 0); 487 if (initial_rotation > 3) 488 initial_rotation = 0; 489 continue; 490 } 491 492 if (!strncmp(options, "margin:", 7)) { 493 options += 7; 494 if (*options) 495 margin_color = simple_strtoul(options, &options, 0); 496 continue; 497 } 498 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 499 if (!strcmp(options, "nodefer")) { 500 deferred_takeover = false; 501 continue; 502 } 503 #endif 504 505 if (!strncmp(options, "logo-pos:", 9)) { 506 options += 9; 507 if (!strcmp(options, "center")) 508 fb_center_logo = true; 509 continue; 510 } 511 512 if (!strncmp(options, "logo-count:", 11)) { 513 options += 11; 514 if (*options) 515 fb_logo_count = simple_strtol(options, &options, 0); 516 continue; 517 } 518 } 519 return 1; 520 } 521 522 __setup("fbcon=", fb_console_setup); 523 #endif 524 525 static int search_fb_in_map(int idx) 526 { 527 int i, retval = 0; 528 529 for (i = first_fb_vc; i <= last_fb_vc; i++) { 530 if (con2fb_map[i] == idx) 531 retval = 1; 532 } 533 return retval; 534 } 535 536 static int search_for_mapped_con(void) 537 { 538 int i, retval = 0; 539 540 for (i = first_fb_vc; i <= last_fb_vc; i++) { 541 if (con2fb_map[i] != -1) 542 retval = 1; 543 } 544 return retval; 545 } 546 547 static int do_fbcon_takeover(int show_logo) 548 { 549 int err, i; 550 551 if (!num_registered_fb) 552 return -ENODEV; 553 554 if (!show_logo) 555 logo_shown = FBCON_LOGO_DONTSHOW; 556 557 for (i = first_fb_vc; i <= last_fb_vc; i++) 558 con2fb_map[i] = info_idx; 559 560 err = do_take_over_console(&fb_con, first_fb_vc, last_fb_vc, 561 fbcon_is_default); 562 563 if (err) { 564 for (i = first_fb_vc; i <= last_fb_vc; i++) 565 con2fb_map[i] = -1; 566 info_idx = -1; 567 } else { 568 fbcon_has_console_bind = 1; 569 } 570 571 return err; 572 } 573 574 #ifdef MODULE 575 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info, 576 int cols, int rows, int new_cols, int new_rows) 577 { 578 logo_shown = FBCON_LOGO_DONTSHOW; 579 } 580 #else 581 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info, 582 int cols, int rows, int new_cols, int new_rows) 583 { 584 /* Need to make room for the logo */ 585 struct fbcon_ops *ops = info->fbcon_par; 586 int cnt, erase = vc->vc_video_erase_char, step; 587 unsigned short *save = NULL, *r, *q; 588 int logo_height; 589 590 if (info->fbops->owner) { 591 logo_shown = FBCON_LOGO_DONTSHOW; 592 return; 593 } 594 595 /* 596 * remove underline attribute from erase character 597 * if black and white framebuffer. 598 */ 599 if (fb_get_color_depth(&info->var, &info->fix) == 1) 600 erase &= ~0x400; 601 logo_height = fb_prepare_logo(info, ops->rotate); 602 logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height); 603 q = (unsigned short *) (vc->vc_origin + 604 vc->vc_size_row * rows); 605 step = logo_lines * cols; 606 for (r = q - logo_lines * cols; r < q; r++) 607 if (scr_readw(r) != vc->vc_video_erase_char) 608 break; 609 if (r != q && new_rows >= rows + logo_lines) { 610 save = kmalloc(array3_size(logo_lines, new_cols, 2), 611 GFP_KERNEL); 612 if (save) { 613 int i = cols < new_cols ? cols : new_cols; 614 scr_memsetw(save, erase, array3_size(logo_lines, new_cols, 2)); 615 r = q - step; 616 for (cnt = 0; cnt < logo_lines; cnt++, r += i) 617 scr_memcpyw(save + cnt * new_cols, r, 2 * i); 618 r = q; 619 } 620 } 621 if (r == q) { 622 /* We can scroll screen down */ 623 r = q - step - cols; 624 for (cnt = rows - logo_lines; cnt > 0; cnt--) { 625 scr_memcpyw(r + step, r, vc->vc_size_row); 626 r -= cols; 627 } 628 if (!save) { 629 int lines; 630 if (vc->state.y + logo_lines >= rows) 631 lines = rows - vc->state.y - 1; 632 else 633 lines = logo_lines; 634 vc->state.y += lines; 635 vc->vc_pos += lines * vc->vc_size_row; 636 } 637 } 638 scr_memsetw((unsigned short *) vc->vc_origin, 639 erase, 640 vc->vc_size_row * logo_lines); 641 642 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) { 643 fbcon_clear_margins(vc, 0); 644 update_screen(vc); 645 } 646 647 if (save) { 648 q = (unsigned short *) (vc->vc_origin + 649 vc->vc_size_row * 650 rows); 651 scr_memcpyw(q, save, array3_size(logo_lines, new_cols, 2)); 652 vc->state.y += logo_lines; 653 vc->vc_pos += logo_lines * vc->vc_size_row; 654 kfree(save); 655 } 656 657 if (logo_shown == FBCON_LOGO_DONTSHOW) 658 return; 659 660 if (logo_lines > vc->vc_bottom) { 661 logo_shown = FBCON_LOGO_CANSHOW; 662 printk(KERN_INFO 663 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n"); 664 } else { 665 logo_shown = FBCON_LOGO_DRAW; 666 vc->vc_top = logo_lines; 667 } 668 } 669 #endif /* MODULE */ 670 671 #ifdef CONFIG_FB_TILEBLITTING 672 static void set_blitting_type(struct vc_data *vc, struct fb_info *info) 673 { 674 struct fbcon_ops *ops = info->fbcon_par; 675 676 ops->p = &fb_display[vc->vc_num]; 677 678 if ((info->flags & FBINFO_MISC_TILEBLITTING)) 679 fbcon_set_tileops(vc, info); 680 else { 681 fbcon_set_rotation(info); 682 fbcon_set_bitops(ops); 683 } 684 } 685 686 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount) 687 { 688 int err = 0; 689 690 if (info->flags & FBINFO_MISC_TILEBLITTING && 691 info->tileops->fb_get_tilemax(info) < charcount) 692 err = 1; 693 694 return err; 695 } 696 #else 697 static void set_blitting_type(struct vc_data *vc, struct fb_info *info) 698 { 699 struct fbcon_ops *ops = info->fbcon_par; 700 701 info->flags &= ~FBINFO_MISC_TILEBLITTING; 702 ops->p = &fb_display[vc->vc_num]; 703 fbcon_set_rotation(info); 704 fbcon_set_bitops(ops); 705 } 706 707 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount) 708 { 709 return 0; 710 } 711 712 #endif /* CONFIG_MISC_TILEBLITTING */ 713 714 715 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info, 716 int unit, int oldidx) 717 { 718 struct fbcon_ops *ops = NULL; 719 int err = 0; 720 721 if (!try_module_get(info->fbops->owner)) 722 err = -ENODEV; 723 724 if (!err && info->fbops->fb_open && 725 info->fbops->fb_open(info, 0)) 726 err = -ENODEV; 727 728 if (!err) { 729 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL); 730 if (!ops) 731 err = -ENOMEM; 732 } 733 734 if (!err) { 735 ops->cur_blink_jiffies = HZ / 5; 736 ops->info = info; 737 info->fbcon_par = ops; 738 739 if (vc) 740 set_blitting_type(vc, info); 741 } 742 743 if (err) { 744 con2fb_map[unit] = oldidx; 745 module_put(info->fbops->owner); 746 } 747 748 return err; 749 } 750 751 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo, 752 struct fb_info *newinfo, int unit, 753 int oldidx, int found) 754 { 755 struct fbcon_ops *ops = oldinfo->fbcon_par; 756 int err = 0, ret; 757 758 if (oldinfo->fbops->fb_release && 759 oldinfo->fbops->fb_release(oldinfo, 0)) { 760 con2fb_map[unit] = oldidx; 761 if (!found && newinfo->fbops->fb_release) 762 newinfo->fbops->fb_release(newinfo, 0); 763 if (!found) 764 module_put(newinfo->fbops->owner); 765 err = -ENODEV; 766 } 767 768 if (!err) { 769 fbcon_del_cursor_timer(oldinfo); 770 kfree(ops->cursor_state.mask); 771 kfree(ops->cursor_data); 772 kfree(ops->cursor_src); 773 kfree(ops->fontbuffer); 774 kfree(oldinfo->fbcon_par); 775 oldinfo->fbcon_par = NULL; 776 module_put(oldinfo->fbops->owner); 777 /* 778 If oldinfo and newinfo are driving the same hardware, 779 the fb_release() method of oldinfo may attempt to 780 restore the hardware state. This will leave the 781 newinfo in an undefined state. Thus, a call to 782 fb_set_par() may be needed for the newinfo. 783 */ 784 if (newinfo && newinfo->fbops->fb_set_par) { 785 ret = newinfo->fbops->fb_set_par(newinfo); 786 787 if (ret) 788 printk(KERN_ERR "con2fb_release_oldinfo: " 789 "detected unhandled fb_set_par error, " 790 "error code %d\n", ret); 791 } 792 } 793 794 return err; 795 } 796 797 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info, 798 int unit, int show_logo) 799 { 800 struct fbcon_ops *ops = info->fbcon_par; 801 int ret; 802 803 ops->currcon = fg_console; 804 805 if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT)) { 806 ret = info->fbops->fb_set_par(info); 807 808 if (ret) 809 printk(KERN_ERR "con2fb_init_display: detected " 810 "unhandled fb_set_par error, " 811 "error code %d\n", ret); 812 } 813 814 ops->flags |= FBCON_FLAGS_INIT; 815 ops->graphics = 0; 816 fbcon_set_disp(info, &info->var, unit); 817 818 if (show_logo) { 819 struct vc_data *fg_vc = vc_cons[fg_console].d; 820 struct fb_info *fg_info = 821 registered_fb[con2fb_map[fg_console]]; 822 823 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols, 824 fg_vc->vc_rows, fg_vc->vc_cols, 825 fg_vc->vc_rows); 826 } 827 828 update_screen(vc_cons[fg_console].d); 829 } 830 831 /** 832 * set_con2fb_map - map console to frame buffer device 833 * @unit: virtual console number to map 834 * @newidx: frame buffer index to map virtual console to 835 * @user: user request 836 * 837 * Maps a virtual console @unit to a frame buffer device 838 * @newidx. 839 * 840 * This should be called with the console lock held. 841 */ 842 static int set_con2fb_map(int unit, int newidx, int user) 843 { 844 struct vc_data *vc = vc_cons[unit].d; 845 int oldidx = con2fb_map[unit]; 846 struct fb_info *info = registered_fb[newidx]; 847 struct fb_info *oldinfo = NULL; 848 int found, err = 0; 849 850 WARN_CONSOLE_UNLOCKED(); 851 852 if (oldidx == newidx) 853 return 0; 854 855 if (!info) 856 return -EINVAL; 857 858 if (!search_for_mapped_con() || !con_is_bound(&fb_con)) { 859 info_idx = newidx; 860 return do_fbcon_takeover(0); 861 } 862 863 if (oldidx != -1) 864 oldinfo = registered_fb[oldidx]; 865 866 found = search_fb_in_map(newidx); 867 868 con2fb_map[unit] = newidx; 869 if (!err && !found) 870 err = con2fb_acquire_newinfo(vc, info, unit, oldidx); 871 872 /* 873 * If old fb is not mapped to any of the consoles, 874 * fbcon should release it. 875 */ 876 if (!err && oldinfo && !search_fb_in_map(oldidx)) 877 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx, 878 found); 879 880 if (!err) { 881 int show_logo = (fg_console == 0 && !user && 882 logo_shown != FBCON_LOGO_DONTSHOW); 883 884 if (!found) 885 fbcon_add_cursor_timer(info); 886 con2fb_map_boot[unit] = newidx; 887 con2fb_init_display(vc, info, unit, show_logo); 888 } 889 890 if (!search_fb_in_map(info_idx)) 891 info_idx = newidx; 892 893 return err; 894 } 895 896 /* 897 * Low Level Operations 898 */ 899 /* NOTE: fbcon cannot be __init: it may be called from do_take_over_console later */ 900 static int var_to_display(struct fbcon_display *disp, 901 struct fb_var_screeninfo *var, 902 struct fb_info *info) 903 { 904 disp->xres_virtual = var->xres_virtual; 905 disp->yres_virtual = var->yres_virtual; 906 disp->bits_per_pixel = var->bits_per_pixel; 907 disp->grayscale = var->grayscale; 908 disp->nonstd = var->nonstd; 909 disp->accel_flags = var->accel_flags; 910 disp->height = var->height; 911 disp->width = var->width; 912 disp->red = var->red; 913 disp->green = var->green; 914 disp->blue = var->blue; 915 disp->transp = var->transp; 916 disp->rotate = var->rotate; 917 disp->mode = fb_match_mode(var, &info->modelist); 918 if (disp->mode == NULL) 919 /* This should not happen */ 920 return -EINVAL; 921 return 0; 922 } 923 924 static void display_to_var(struct fb_var_screeninfo *var, 925 struct fbcon_display *disp) 926 { 927 fb_videomode_to_var(var, disp->mode); 928 var->xres_virtual = disp->xres_virtual; 929 var->yres_virtual = disp->yres_virtual; 930 var->bits_per_pixel = disp->bits_per_pixel; 931 var->grayscale = disp->grayscale; 932 var->nonstd = disp->nonstd; 933 var->accel_flags = disp->accel_flags; 934 var->height = disp->height; 935 var->width = disp->width; 936 var->red = disp->red; 937 var->green = disp->green; 938 var->blue = disp->blue; 939 var->transp = disp->transp; 940 var->rotate = disp->rotate; 941 } 942 943 static const char *fbcon_startup(void) 944 { 945 const char *display_desc = "frame buffer device"; 946 struct fbcon_display *p = &fb_display[fg_console]; 947 struct vc_data *vc = vc_cons[fg_console].d; 948 const struct font_desc *font = NULL; 949 struct module *owner; 950 struct fb_info *info = NULL; 951 struct fbcon_ops *ops; 952 int rows, cols; 953 954 /* 955 * If num_registered_fb is zero, this is a call for the dummy part. 956 * The frame buffer devices weren't initialized yet. 957 */ 958 if (!num_registered_fb || info_idx == -1) 959 return display_desc; 960 /* 961 * Instead of blindly using registered_fb[0], we use info_idx, set by 962 * fb_console_init(); 963 */ 964 info = registered_fb[info_idx]; 965 if (!info) 966 return NULL; 967 968 owner = info->fbops->owner; 969 if (!try_module_get(owner)) 970 return NULL; 971 if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) { 972 module_put(owner); 973 return NULL; 974 } 975 976 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL); 977 if (!ops) { 978 module_put(owner); 979 return NULL; 980 } 981 982 ops->currcon = -1; 983 ops->graphics = 1; 984 ops->cur_rotate = -1; 985 ops->cur_blink_jiffies = HZ / 5; 986 ops->info = info; 987 info->fbcon_par = ops; 988 989 p->con_rotate = initial_rotation; 990 if (p->con_rotate == -1) 991 p->con_rotate = info->fbcon_rotate_hint; 992 if (p->con_rotate == -1) 993 p->con_rotate = FB_ROTATE_UR; 994 995 set_blitting_type(vc, info); 996 997 /* Setup default font */ 998 if (!p->fontdata && !vc->vc_font.data) { 999 if (!fontname[0] || !(font = find_font(fontname))) 1000 font = get_default_font(info->var.xres, 1001 info->var.yres, 1002 info->pixmap.blit_x, 1003 info->pixmap.blit_y); 1004 vc->vc_font.width = font->width; 1005 vc->vc_font.height = font->height; 1006 vc->vc_font.data = (void *)(p->fontdata = font->data); 1007 vc->vc_font.charcount = font->charcount; 1008 } else { 1009 p->fontdata = vc->vc_font.data; 1010 } 1011 1012 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 1013 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 1014 cols /= vc->vc_font.width; 1015 rows /= vc->vc_font.height; 1016 vc_resize(vc, cols, rows); 1017 1018 DPRINTK("mode: %s\n", info->fix.id); 1019 DPRINTK("visual: %d\n", info->fix.visual); 1020 DPRINTK("res: %dx%d-%d\n", info->var.xres, 1021 info->var.yres, 1022 info->var.bits_per_pixel); 1023 1024 fbcon_add_cursor_timer(info); 1025 return display_desc; 1026 } 1027 1028 static void fbcon_init(struct vc_data *vc, int init) 1029 { 1030 struct fb_info *info; 1031 struct fbcon_ops *ops; 1032 struct vc_data **default_mode = vc->vc_display_fg; 1033 struct vc_data *svc = *default_mode; 1034 struct fbcon_display *t, *p = &fb_display[vc->vc_num]; 1035 int logo = 1, new_rows, new_cols, rows, cols; 1036 int ret; 1037 1038 if (WARN_ON(info_idx == -1)) 1039 return; 1040 1041 if (con2fb_map[vc->vc_num] == -1) 1042 con2fb_map[vc->vc_num] = info_idx; 1043 1044 info = registered_fb[con2fb_map[vc->vc_num]]; 1045 1046 if (logo_shown < 0 && console_loglevel <= CONSOLE_LOGLEVEL_QUIET) 1047 logo_shown = FBCON_LOGO_DONTSHOW; 1048 1049 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW || 1050 (info->fix.type == FB_TYPE_TEXT)) 1051 logo = 0; 1052 1053 if (var_to_display(p, &info->var, info)) 1054 return; 1055 1056 if (!info->fbcon_par) 1057 con2fb_acquire_newinfo(vc, info, vc->vc_num, -1); 1058 1059 /* If we are not the first console on this 1060 fb, copy the font from that console */ 1061 t = &fb_display[fg_console]; 1062 if (!p->fontdata) { 1063 if (t->fontdata) { 1064 struct vc_data *fvc = vc_cons[fg_console].d; 1065 1066 vc->vc_font.data = (void *)(p->fontdata = 1067 fvc->vc_font.data); 1068 vc->vc_font.width = fvc->vc_font.width; 1069 vc->vc_font.height = fvc->vc_font.height; 1070 vc->vc_font.charcount = fvc->vc_font.charcount; 1071 p->userfont = t->userfont; 1072 1073 if (p->userfont) 1074 REFCOUNT(p->fontdata)++; 1075 } else { 1076 const struct font_desc *font = NULL; 1077 1078 if (!fontname[0] || !(font = find_font(fontname))) 1079 font = get_default_font(info->var.xres, 1080 info->var.yres, 1081 info->pixmap.blit_x, 1082 info->pixmap.blit_y); 1083 vc->vc_font.width = font->width; 1084 vc->vc_font.height = font->height; 1085 vc->vc_font.data = (void *)(p->fontdata = font->data); 1086 vc->vc_font.charcount = font->charcount; 1087 } 1088 } 1089 1090 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1); 1091 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 1092 if (vc->vc_font.charcount == 256) { 1093 vc->vc_hi_font_mask = 0; 1094 } else { 1095 vc->vc_hi_font_mask = 0x100; 1096 if (vc->vc_can_do_color) 1097 vc->vc_complement_mask <<= 1; 1098 } 1099 1100 if (!*svc->vc_uni_pagedir_loc) 1101 con_set_default_unimap(svc); 1102 if (!*vc->vc_uni_pagedir_loc) 1103 con_copy_unimap(vc, svc); 1104 1105 ops = info->fbcon_par; 1106 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms); 1107 1108 p->con_rotate = initial_rotation; 1109 if (p->con_rotate == -1) 1110 p->con_rotate = info->fbcon_rotate_hint; 1111 if (p->con_rotate == -1) 1112 p->con_rotate = FB_ROTATE_UR; 1113 1114 set_blitting_type(vc, info); 1115 1116 cols = vc->vc_cols; 1117 rows = vc->vc_rows; 1118 new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 1119 new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 1120 new_cols /= vc->vc_font.width; 1121 new_rows /= vc->vc_font.height; 1122 1123 /* 1124 * We must always set the mode. The mode of the previous console 1125 * driver could be in the same resolution but we are using different 1126 * hardware so we have to initialize the hardware. 1127 * 1128 * We need to do it in fbcon_init() to prevent screen corruption. 1129 */ 1130 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) { 1131 if (info->fbops->fb_set_par && 1132 !(ops->flags & FBCON_FLAGS_INIT)) { 1133 ret = info->fbops->fb_set_par(info); 1134 1135 if (ret) 1136 printk(KERN_ERR "fbcon_init: detected " 1137 "unhandled fb_set_par error, " 1138 "error code %d\n", ret); 1139 } 1140 1141 ops->flags |= FBCON_FLAGS_INIT; 1142 } 1143 1144 ops->graphics = 0; 1145 1146 /* 1147 * No more hw acceleration for fbcon. 1148 * 1149 * FIXME: Garbage collect all the now dead code after sufficient time 1150 * has passed. 1151 */ 1152 p->scrollmode = SCROLL_REDRAW; 1153 1154 /* 1155 * ++guenther: console.c:vc_allocate() relies on initializing 1156 * vc_{cols,rows}, but we must not set those if we are only 1157 * resizing the console. 1158 */ 1159 if (init) { 1160 vc->vc_cols = new_cols; 1161 vc->vc_rows = new_rows; 1162 } else 1163 vc_resize(vc, new_cols, new_rows); 1164 1165 if (logo) 1166 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows); 1167 1168 if (ops->rotate_font && ops->rotate_font(info, vc)) { 1169 ops->rotate = FB_ROTATE_UR; 1170 set_blitting_type(vc, info); 1171 } 1172 1173 ops->p = &fb_display[fg_console]; 1174 } 1175 1176 static void fbcon_free_font(struct fbcon_display *p, bool freefont) 1177 { 1178 if (freefont && p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0)) 1179 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int)); 1180 p->fontdata = NULL; 1181 p->userfont = 0; 1182 } 1183 1184 static void set_vc_hi_font(struct vc_data *vc, bool set); 1185 1186 static void fbcon_deinit(struct vc_data *vc) 1187 { 1188 struct fbcon_display *p = &fb_display[vc->vc_num]; 1189 struct fb_info *info; 1190 struct fbcon_ops *ops; 1191 int idx; 1192 bool free_font = true; 1193 1194 idx = con2fb_map[vc->vc_num]; 1195 1196 if (idx == -1) 1197 goto finished; 1198 1199 info = registered_fb[idx]; 1200 1201 if (!info) 1202 goto finished; 1203 1204 if (info->flags & FBINFO_MISC_FIRMWARE) 1205 free_font = false; 1206 ops = info->fbcon_par; 1207 1208 if (!ops) 1209 goto finished; 1210 1211 if (con_is_visible(vc)) 1212 fbcon_del_cursor_timer(info); 1213 1214 ops->flags &= ~FBCON_FLAGS_INIT; 1215 finished: 1216 1217 fbcon_free_font(p, free_font); 1218 if (free_font) 1219 vc->vc_font.data = NULL; 1220 1221 if (vc->vc_hi_font_mask && vc->vc_screenbuf) 1222 set_vc_hi_font(vc, false); 1223 1224 if (!con_is_bound(&fb_con)) 1225 fbcon_exit(); 1226 1227 if (vc->vc_num == logo_shown) 1228 logo_shown = FBCON_LOGO_CANSHOW; 1229 1230 return; 1231 } 1232 1233 /* ====================================================================== */ 1234 1235 /* fbcon_XXX routines - interface used by the world 1236 * 1237 * This system is now divided into two levels because of complications 1238 * caused by hardware scrolling. Top level functions: 1239 * 1240 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins() 1241 * 1242 * handles y values in range [0, scr_height-1] that correspond to real 1243 * screen positions. y_wrap shift means that first line of bitmap may be 1244 * anywhere on this display. These functions convert lineoffsets to 1245 * bitmap offsets and deal with the wrap-around case by splitting blits. 1246 * 1247 * fbcon_bmove_physical_8() -- These functions fast implementations 1248 * fbcon_clear_physical_8() -- of original fbcon_XXX fns. 1249 * fbcon_putc_physical_8() -- (font width != 8) may be added later 1250 * 1251 * WARNING: 1252 * 1253 * At the moment fbcon_putc() cannot blit across vertical wrap boundary 1254 * Implies should only really hardware scroll in rows. Only reason for 1255 * restriction is simplicity & efficiency at the moment. 1256 */ 1257 1258 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height, 1259 int width) 1260 { 1261 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1262 struct fbcon_ops *ops = info->fbcon_par; 1263 1264 struct fbcon_display *p = &fb_display[vc->vc_num]; 1265 u_int y_break; 1266 1267 if (fbcon_is_inactive(vc, info)) 1268 return; 1269 1270 if (!height || !width) 1271 return; 1272 1273 if (sy < vc->vc_top && vc->vc_top == logo_lines) { 1274 vc->vc_top = 0; 1275 /* 1276 * If the font dimensions are not an integral of the display 1277 * dimensions then the ops->clear below won't end up clearing 1278 * the margins. Call clear_margins here in case the logo 1279 * bitmap stretched into the margin area. 1280 */ 1281 fbcon_clear_margins(vc, 0); 1282 } 1283 1284 /* Split blits that cross physical y_wrap boundary */ 1285 1286 y_break = p->vrows - p->yscroll; 1287 if (sy < y_break && sy + height - 1 >= y_break) { 1288 u_int b = y_break - sy; 1289 ops->clear(vc, info, real_y(p, sy), sx, b, width); 1290 ops->clear(vc, info, real_y(p, sy + b), sx, height - b, 1291 width); 1292 } else 1293 ops->clear(vc, info, real_y(p, sy), sx, height, width); 1294 } 1295 1296 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s, 1297 int count, int ypos, int xpos) 1298 { 1299 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1300 struct fbcon_display *p = &fb_display[vc->vc_num]; 1301 struct fbcon_ops *ops = info->fbcon_par; 1302 1303 if (!fbcon_is_inactive(vc, info)) 1304 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos, 1305 get_color(vc, info, scr_readw(s), 1), 1306 get_color(vc, info, scr_readw(s), 0)); 1307 } 1308 1309 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos) 1310 { 1311 unsigned short chr; 1312 1313 scr_writew(c, &chr); 1314 fbcon_putcs(vc, &chr, 1, ypos, xpos); 1315 } 1316 1317 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only) 1318 { 1319 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1320 struct fbcon_ops *ops = info->fbcon_par; 1321 1322 if (!fbcon_is_inactive(vc, info)) 1323 ops->clear_margins(vc, info, margin_color, bottom_only); 1324 } 1325 1326 static void fbcon_cursor(struct vc_data *vc, int mode) 1327 { 1328 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1329 struct fbcon_ops *ops = info->fbcon_par; 1330 int c = scr_readw((u16 *) vc->vc_pos); 1331 1332 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms); 1333 1334 if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1) 1335 return; 1336 1337 if (vc->vc_cursor_type & CUR_SW) 1338 fbcon_del_cursor_timer(info); 1339 else 1340 fbcon_add_cursor_timer(info); 1341 1342 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1; 1343 1344 ops->cursor(vc, info, mode, get_color(vc, info, c, 1), 1345 get_color(vc, info, c, 0)); 1346 } 1347 1348 static int scrollback_phys_max = 0; 1349 static int scrollback_max = 0; 1350 static int scrollback_current = 0; 1351 1352 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var, 1353 int unit) 1354 { 1355 struct fbcon_display *p, *t; 1356 struct vc_data **default_mode, *vc; 1357 struct vc_data *svc; 1358 struct fbcon_ops *ops = info->fbcon_par; 1359 int rows, cols; 1360 1361 p = &fb_display[unit]; 1362 1363 if (var_to_display(p, var, info)) 1364 return; 1365 1366 vc = vc_cons[unit].d; 1367 1368 if (!vc) 1369 return; 1370 1371 default_mode = vc->vc_display_fg; 1372 svc = *default_mode; 1373 t = &fb_display[svc->vc_num]; 1374 1375 if (!vc->vc_font.data) { 1376 vc->vc_font.data = (void *)(p->fontdata = t->fontdata); 1377 vc->vc_font.width = (*default_mode)->vc_font.width; 1378 vc->vc_font.height = (*default_mode)->vc_font.height; 1379 vc->vc_font.charcount = (*default_mode)->vc_font.charcount; 1380 p->userfont = t->userfont; 1381 if (p->userfont) 1382 REFCOUNT(p->fontdata)++; 1383 } 1384 1385 var->activate = FB_ACTIVATE_NOW; 1386 info->var.activate = var->activate; 1387 var->yoffset = info->var.yoffset; 1388 var->xoffset = info->var.xoffset; 1389 fb_set_var(info, var); 1390 ops->var = info->var; 1391 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1); 1392 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 1393 if (vc->vc_font.charcount == 256) { 1394 vc->vc_hi_font_mask = 0; 1395 } else { 1396 vc->vc_hi_font_mask = 0x100; 1397 if (vc->vc_can_do_color) 1398 vc->vc_complement_mask <<= 1; 1399 } 1400 1401 if (!*svc->vc_uni_pagedir_loc) 1402 con_set_default_unimap(svc); 1403 if (!*vc->vc_uni_pagedir_loc) 1404 con_copy_unimap(vc, svc); 1405 1406 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 1407 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 1408 cols /= vc->vc_font.width; 1409 rows /= vc->vc_font.height; 1410 vc_resize(vc, cols, rows); 1411 1412 if (con_is_visible(vc)) { 1413 update_screen(vc); 1414 } 1415 } 1416 1417 static __inline__ void ywrap_up(struct vc_data *vc, int count) 1418 { 1419 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1420 struct fbcon_ops *ops = info->fbcon_par; 1421 struct fbcon_display *p = &fb_display[vc->vc_num]; 1422 1423 p->yscroll += count; 1424 if (p->yscroll >= p->vrows) /* Deal with wrap */ 1425 p->yscroll -= p->vrows; 1426 ops->var.xoffset = 0; 1427 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1428 ops->var.vmode |= FB_VMODE_YWRAP; 1429 ops->update_start(info); 1430 scrollback_max += count; 1431 if (scrollback_max > scrollback_phys_max) 1432 scrollback_max = scrollback_phys_max; 1433 scrollback_current = 0; 1434 } 1435 1436 static __inline__ void ywrap_down(struct vc_data *vc, int count) 1437 { 1438 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1439 struct fbcon_ops *ops = info->fbcon_par; 1440 struct fbcon_display *p = &fb_display[vc->vc_num]; 1441 1442 p->yscroll -= count; 1443 if (p->yscroll < 0) /* Deal with wrap */ 1444 p->yscroll += p->vrows; 1445 ops->var.xoffset = 0; 1446 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1447 ops->var.vmode |= FB_VMODE_YWRAP; 1448 ops->update_start(info); 1449 scrollback_max -= count; 1450 if (scrollback_max < 0) 1451 scrollback_max = 0; 1452 scrollback_current = 0; 1453 } 1454 1455 static __inline__ void ypan_up(struct vc_data *vc, int count) 1456 { 1457 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1458 struct fbcon_display *p = &fb_display[vc->vc_num]; 1459 struct fbcon_ops *ops = info->fbcon_par; 1460 1461 p->yscroll += count; 1462 if (p->yscroll > p->vrows - vc->vc_rows) { 1463 ops->bmove(vc, info, p->vrows - vc->vc_rows, 1464 0, 0, 0, vc->vc_rows, vc->vc_cols); 1465 p->yscroll -= p->vrows - vc->vc_rows; 1466 } 1467 1468 ops->var.xoffset = 0; 1469 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1470 ops->var.vmode &= ~FB_VMODE_YWRAP; 1471 ops->update_start(info); 1472 fbcon_clear_margins(vc, 1); 1473 scrollback_max += count; 1474 if (scrollback_max > scrollback_phys_max) 1475 scrollback_max = scrollback_phys_max; 1476 scrollback_current = 0; 1477 } 1478 1479 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count) 1480 { 1481 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1482 struct fbcon_ops *ops = info->fbcon_par; 1483 struct fbcon_display *p = &fb_display[vc->vc_num]; 1484 1485 p->yscroll += count; 1486 1487 if (p->yscroll > p->vrows - vc->vc_rows) { 1488 p->yscroll -= p->vrows - vc->vc_rows; 1489 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t); 1490 } 1491 1492 ops->var.xoffset = 0; 1493 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1494 ops->var.vmode &= ~FB_VMODE_YWRAP; 1495 ops->update_start(info); 1496 fbcon_clear_margins(vc, 1); 1497 scrollback_max += count; 1498 if (scrollback_max > scrollback_phys_max) 1499 scrollback_max = scrollback_phys_max; 1500 scrollback_current = 0; 1501 } 1502 1503 static __inline__ void ypan_down(struct vc_data *vc, int count) 1504 { 1505 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1506 struct fbcon_display *p = &fb_display[vc->vc_num]; 1507 struct fbcon_ops *ops = info->fbcon_par; 1508 1509 p->yscroll -= count; 1510 if (p->yscroll < 0) { 1511 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows, 1512 0, vc->vc_rows, vc->vc_cols); 1513 p->yscroll += p->vrows - vc->vc_rows; 1514 } 1515 1516 ops->var.xoffset = 0; 1517 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1518 ops->var.vmode &= ~FB_VMODE_YWRAP; 1519 ops->update_start(info); 1520 fbcon_clear_margins(vc, 1); 1521 scrollback_max -= count; 1522 if (scrollback_max < 0) 1523 scrollback_max = 0; 1524 scrollback_current = 0; 1525 } 1526 1527 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count) 1528 { 1529 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1530 struct fbcon_ops *ops = info->fbcon_par; 1531 struct fbcon_display *p = &fb_display[vc->vc_num]; 1532 1533 p->yscroll -= count; 1534 1535 if (p->yscroll < 0) { 1536 p->yscroll += p->vrows - vc->vc_rows; 1537 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count); 1538 } 1539 1540 ops->var.xoffset = 0; 1541 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1542 ops->var.vmode &= ~FB_VMODE_YWRAP; 1543 ops->update_start(info); 1544 fbcon_clear_margins(vc, 1); 1545 scrollback_max -= count; 1546 if (scrollback_max < 0) 1547 scrollback_max = 0; 1548 scrollback_current = 0; 1549 } 1550 1551 static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p, 1552 int line, int count, int dy) 1553 { 1554 unsigned short *s = (unsigned short *) 1555 (vc->vc_origin + vc->vc_size_row * line); 1556 1557 while (count--) { 1558 unsigned short *start = s; 1559 unsigned short *le = advance_row(s, 1); 1560 unsigned short c; 1561 int x = 0; 1562 unsigned short attr = 1; 1563 1564 do { 1565 c = scr_readw(s); 1566 if (attr != (c & 0xff00)) { 1567 attr = c & 0xff00; 1568 if (s > start) { 1569 fbcon_putcs(vc, start, s - start, 1570 dy, x); 1571 x += s - start; 1572 start = s; 1573 } 1574 } 1575 console_conditional_schedule(); 1576 s++; 1577 } while (s < le); 1578 if (s > start) 1579 fbcon_putcs(vc, start, s - start, dy, x); 1580 console_conditional_schedule(); 1581 dy++; 1582 } 1583 } 1584 1585 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info, 1586 struct fbcon_display *p, int line, int count, int ycount) 1587 { 1588 int offset = ycount * vc->vc_cols; 1589 unsigned short *d = (unsigned short *) 1590 (vc->vc_origin + vc->vc_size_row * line); 1591 unsigned short *s = d + offset; 1592 struct fbcon_ops *ops = info->fbcon_par; 1593 1594 while (count--) { 1595 unsigned short *start = s; 1596 unsigned short *le = advance_row(s, 1); 1597 unsigned short c; 1598 int x = 0; 1599 1600 do { 1601 c = scr_readw(s); 1602 1603 if (c == scr_readw(d)) { 1604 if (s > start) { 1605 ops->bmove(vc, info, line + ycount, x, 1606 line, x, 1, s-start); 1607 x += s - start + 1; 1608 start = s + 1; 1609 } else { 1610 x++; 1611 start++; 1612 } 1613 } 1614 1615 scr_writew(c, d); 1616 console_conditional_schedule(); 1617 s++; 1618 d++; 1619 } while (s < le); 1620 if (s > start) 1621 ops->bmove(vc, info, line + ycount, x, line, x, 1, 1622 s-start); 1623 console_conditional_schedule(); 1624 if (ycount > 0) 1625 line++; 1626 else { 1627 line--; 1628 /* NOTE: We subtract two lines from these pointers */ 1629 s -= vc->vc_size_row; 1630 d -= vc->vc_size_row; 1631 } 1632 } 1633 } 1634 1635 static void fbcon_redraw(struct vc_data *vc, struct fbcon_display *p, 1636 int line, int count, int offset) 1637 { 1638 unsigned short *d = (unsigned short *) 1639 (vc->vc_origin + vc->vc_size_row * line); 1640 unsigned short *s = d + offset; 1641 1642 while (count--) { 1643 unsigned short *start = s; 1644 unsigned short *le = advance_row(s, 1); 1645 unsigned short c; 1646 int x = 0; 1647 unsigned short attr = 1; 1648 1649 do { 1650 c = scr_readw(s); 1651 if (attr != (c & 0xff00)) { 1652 attr = c & 0xff00; 1653 if (s > start) { 1654 fbcon_putcs(vc, start, s - start, 1655 line, x); 1656 x += s - start; 1657 start = s; 1658 } 1659 } 1660 if (c == scr_readw(d)) { 1661 if (s > start) { 1662 fbcon_putcs(vc, start, s - start, 1663 line, x); 1664 x += s - start + 1; 1665 start = s + 1; 1666 } else { 1667 x++; 1668 start++; 1669 } 1670 } 1671 scr_writew(c, d); 1672 console_conditional_schedule(); 1673 s++; 1674 d++; 1675 } while (s < le); 1676 if (s > start) 1677 fbcon_putcs(vc, start, s - start, line, x); 1678 console_conditional_schedule(); 1679 if (offset > 0) 1680 line++; 1681 else { 1682 line--; 1683 /* NOTE: We subtract two lines from these pointers */ 1684 s -= vc->vc_size_row; 1685 d -= vc->vc_size_row; 1686 } 1687 } 1688 } 1689 1690 static bool fbcon_scroll(struct vc_data *vc, unsigned int t, unsigned int b, 1691 enum con_scroll dir, unsigned int count) 1692 { 1693 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1694 struct fbcon_display *p = &fb_display[vc->vc_num]; 1695 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK; 1696 1697 if (fbcon_is_inactive(vc, info)) 1698 return true; 1699 1700 fbcon_cursor(vc, CM_ERASE); 1701 1702 /* 1703 * ++Geert: Only use ywrap/ypan if the console is in text mode 1704 * ++Andrew: Only use ypan on hardware text mode when scrolling the 1705 * whole screen (prevents flicker). 1706 */ 1707 1708 switch (dir) { 1709 case SM_UP: 1710 if (count > vc->vc_rows) /* Maximum realistic size */ 1711 count = vc->vc_rows; 1712 if (logo_shown >= 0) 1713 goto redraw_up; 1714 switch (p->scrollmode) { 1715 case SCROLL_MOVE: 1716 fbcon_redraw_blit(vc, info, p, t, b - t - count, 1717 count); 1718 fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1719 scr_memsetw((unsigned short *) (vc->vc_origin + 1720 vc->vc_size_row * 1721 (b - count)), 1722 vc->vc_video_erase_char, 1723 vc->vc_size_row * count); 1724 return true; 1725 1726 case SCROLL_WRAP_MOVE: 1727 if (b - t - count > 3 * vc->vc_rows >> 2) { 1728 if (t > 0) 1729 fbcon_bmove(vc, 0, 0, count, 0, t, 1730 vc->vc_cols); 1731 ywrap_up(vc, count); 1732 if (vc->vc_rows - b > 0) 1733 fbcon_bmove(vc, b - count, 0, b, 0, 1734 vc->vc_rows - b, 1735 vc->vc_cols); 1736 } else if (info->flags & FBINFO_READS_FAST) 1737 fbcon_bmove(vc, t + count, 0, t, 0, 1738 b - t - count, vc->vc_cols); 1739 else 1740 goto redraw_up; 1741 fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1742 break; 1743 1744 case SCROLL_PAN_REDRAW: 1745 if ((p->yscroll + count <= 1746 2 * (p->vrows - vc->vc_rows)) 1747 && ((!scroll_partial && (b - t == vc->vc_rows)) 1748 || (scroll_partial 1749 && (b - t - count > 1750 3 * vc->vc_rows >> 2)))) { 1751 if (t > 0) 1752 fbcon_redraw_move(vc, p, 0, t, count); 1753 ypan_up_redraw(vc, t, count); 1754 if (vc->vc_rows - b > 0) 1755 fbcon_redraw_move(vc, p, b, 1756 vc->vc_rows - b, b); 1757 } else 1758 fbcon_redraw_move(vc, p, t + count, b - t - count, t); 1759 fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1760 break; 1761 1762 case SCROLL_PAN_MOVE: 1763 if ((p->yscroll + count <= 1764 2 * (p->vrows - vc->vc_rows)) 1765 && ((!scroll_partial && (b - t == vc->vc_rows)) 1766 || (scroll_partial 1767 && (b - t - count > 1768 3 * vc->vc_rows >> 2)))) { 1769 if (t > 0) 1770 fbcon_bmove(vc, 0, 0, count, 0, t, 1771 vc->vc_cols); 1772 ypan_up(vc, count); 1773 if (vc->vc_rows - b > 0) 1774 fbcon_bmove(vc, b - count, 0, b, 0, 1775 vc->vc_rows - b, 1776 vc->vc_cols); 1777 } else if (info->flags & FBINFO_READS_FAST) 1778 fbcon_bmove(vc, t + count, 0, t, 0, 1779 b - t - count, vc->vc_cols); 1780 else 1781 goto redraw_up; 1782 fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1783 break; 1784 1785 case SCROLL_REDRAW: 1786 redraw_up: 1787 fbcon_redraw(vc, p, t, b - t - count, 1788 count * vc->vc_cols); 1789 fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1790 scr_memsetw((unsigned short *) (vc->vc_origin + 1791 vc->vc_size_row * 1792 (b - count)), 1793 vc->vc_video_erase_char, 1794 vc->vc_size_row * count); 1795 return true; 1796 } 1797 break; 1798 1799 case SM_DOWN: 1800 if (count > vc->vc_rows) /* Maximum realistic size */ 1801 count = vc->vc_rows; 1802 if (logo_shown >= 0) 1803 goto redraw_down; 1804 switch (p->scrollmode) { 1805 case SCROLL_MOVE: 1806 fbcon_redraw_blit(vc, info, p, b - 1, b - t - count, 1807 -count); 1808 fbcon_clear(vc, t, 0, count, vc->vc_cols); 1809 scr_memsetw((unsigned short *) (vc->vc_origin + 1810 vc->vc_size_row * 1811 t), 1812 vc->vc_video_erase_char, 1813 vc->vc_size_row * count); 1814 return true; 1815 1816 case SCROLL_WRAP_MOVE: 1817 if (b - t - count > 3 * vc->vc_rows >> 2) { 1818 if (vc->vc_rows - b > 0) 1819 fbcon_bmove(vc, b, 0, b - count, 0, 1820 vc->vc_rows - b, 1821 vc->vc_cols); 1822 ywrap_down(vc, count); 1823 if (t > 0) 1824 fbcon_bmove(vc, count, 0, 0, 0, t, 1825 vc->vc_cols); 1826 } else if (info->flags & FBINFO_READS_FAST) 1827 fbcon_bmove(vc, t, 0, t + count, 0, 1828 b - t - count, vc->vc_cols); 1829 else 1830 goto redraw_down; 1831 fbcon_clear(vc, t, 0, count, vc->vc_cols); 1832 break; 1833 1834 case SCROLL_PAN_MOVE: 1835 if ((count - p->yscroll <= p->vrows - vc->vc_rows) 1836 && ((!scroll_partial && (b - t == vc->vc_rows)) 1837 || (scroll_partial 1838 && (b - t - count > 1839 3 * vc->vc_rows >> 2)))) { 1840 if (vc->vc_rows - b > 0) 1841 fbcon_bmove(vc, b, 0, b - count, 0, 1842 vc->vc_rows - b, 1843 vc->vc_cols); 1844 ypan_down(vc, count); 1845 if (t > 0) 1846 fbcon_bmove(vc, count, 0, 0, 0, t, 1847 vc->vc_cols); 1848 } else if (info->flags & FBINFO_READS_FAST) 1849 fbcon_bmove(vc, t, 0, t + count, 0, 1850 b - t - count, vc->vc_cols); 1851 else 1852 goto redraw_down; 1853 fbcon_clear(vc, t, 0, count, vc->vc_cols); 1854 break; 1855 1856 case SCROLL_PAN_REDRAW: 1857 if ((count - p->yscroll <= p->vrows - vc->vc_rows) 1858 && ((!scroll_partial && (b - t == vc->vc_rows)) 1859 || (scroll_partial 1860 && (b - t - count > 1861 3 * vc->vc_rows >> 2)))) { 1862 if (vc->vc_rows - b > 0) 1863 fbcon_redraw_move(vc, p, b, vc->vc_rows - b, 1864 b - count); 1865 ypan_down_redraw(vc, t, count); 1866 if (t > 0) 1867 fbcon_redraw_move(vc, p, count, t, 0); 1868 } else 1869 fbcon_redraw_move(vc, p, t, b - t - count, t + count); 1870 fbcon_clear(vc, t, 0, count, vc->vc_cols); 1871 break; 1872 1873 case SCROLL_REDRAW: 1874 redraw_down: 1875 fbcon_redraw(vc, p, b - 1, b - t - count, 1876 -count * vc->vc_cols); 1877 fbcon_clear(vc, t, 0, count, vc->vc_cols); 1878 scr_memsetw((unsigned short *) (vc->vc_origin + 1879 vc->vc_size_row * 1880 t), 1881 vc->vc_video_erase_char, 1882 vc->vc_size_row * count); 1883 return true; 1884 } 1885 } 1886 return false; 1887 } 1888 1889 1890 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx, 1891 int height, int width) 1892 { 1893 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1894 struct fbcon_display *p = &fb_display[vc->vc_num]; 1895 1896 if (fbcon_is_inactive(vc, info)) 1897 return; 1898 1899 if (!width || !height) 1900 return; 1901 1902 /* Split blits that cross physical y_wrap case. 1903 * Pathological case involves 4 blits, better to use recursive 1904 * code rather than unrolled case 1905 * 1906 * Recursive invocations don't need to erase the cursor over and 1907 * over again, so we use fbcon_bmove_rec() 1908 */ 1909 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width, 1910 p->vrows - p->yscroll); 1911 } 1912 1913 static void fbcon_bmove_rec(struct vc_data *vc, struct fbcon_display *p, int sy, int sx, 1914 int dy, int dx, int height, int width, u_int y_break) 1915 { 1916 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1917 struct fbcon_ops *ops = info->fbcon_par; 1918 u_int b; 1919 1920 if (sy < y_break && sy + height > y_break) { 1921 b = y_break - sy; 1922 if (dy < sy) { /* Avoid trashing self */ 1923 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1924 y_break); 1925 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1926 height - b, width, y_break); 1927 } else { 1928 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1929 height - b, width, y_break); 1930 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1931 y_break); 1932 } 1933 return; 1934 } 1935 1936 if (dy < y_break && dy + height > y_break) { 1937 b = y_break - dy; 1938 if (dy < sy) { /* Avoid trashing self */ 1939 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1940 y_break); 1941 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1942 height - b, width, y_break); 1943 } else { 1944 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1945 height - b, width, y_break); 1946 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1947 y_break); 1948 } 1949 return; 1950 } 1951 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx, 1952 height, width); 1953 } 1954 1955 static void updatescrollmode(struct fbcon_display *p, 1956 struct fb_info *info, 1957 struct vc_data *vc) 1958 { 1959 struct fbcon_ops *ops = info->fbcon_par; 1960 int fh = vc->vc_font.height; 1961 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 1962 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual, 1963 info->var.xres_virtual); 1964 1965 p->vrows = vyres/fh; 1966 if (yres > (fh * (vc->vc_rows + 1))) 1967 p->vrows -= (yres - (fh * vc->vc_rows)) / fh; 1968 if ((yres % fh) && (vyres % fh < yres % fh)) 1969 p->vrows--; 1970 } 1971 1972 #define PITCH(w) (((w) + 7) >> 3) 1973 #define CALC_FONTSZ(h, p, c) ((h) * (p) * (c)) /* size = height * pitch * charcount */ 1974 1975 static int fbcon_resize(struct vc_data *vc, unsigned int width, 1976 unsigned int height, unsigned int user) 1977 { 1978 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1979 struct fbcon_ops *ops = info->fbcon_par; 1980 struct fbcon_display *p = &fb_display[vc->vc_num]; 1981 struct fb_var_screeninfo var = info->var; 1982 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh; 1983 1984 if (p->userfont && FNTSIZE(vc->vc_font.data)) { 1985 int size; 1986 int pitch = PITCH(vc->vc_font.width); 1987 1988 /* 1989 * If user font, ensure that a possible change to user font 1990 * height or width will not allow a font data out-of-bounds access. 1991 * NOTE: must use original charcount in calculation as font 1992 * charcount can change and cannot be used to determine the 1993 * font data allocated size. 1994 */ 1995 if (pitch <= 0) 1996 return -EINVAL; 1997 size = CALC_FONTSZ(vc->vc_font.height, pitch, vc->vc_font.charcount); 1998 if (size > FNTSIZE(vc->vc_font.data)) 1999 return -EINVAL; 2000 } 2001 2002 virt_w = FBCON_SWAP(ops->rotate, width, height); 2003 virt_h = FBCON_SWAP(ops->rotate, height, width); 2004 virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width, 2005 vc->vc_font.height); 2006 virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height, 2007 vc->vc_font.width); 2008 var.xres = virt_w * virt_fw; 2009 var.yres = virt_h * virt_fh; 2010 x_diff = info->var.xres - var.xres; 2011 y_diff = info->var.yres - var.yres; 2012 if (x_diff < 0 || x_diff > virt_fw || 2013 y_diff < 0 || y_diff > virt_fh) { 2014 const struct fb_videomode *mode; 2015 2016 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres); 2017 mode = fb_find_best_mode(&var, &info->modelist); 2018 if (mode == NULL) 2019 return -EINVAL; 2020 display_to_var(&var, p); 2021 fb_videomode_to_var(&var, mode); 2022 2023 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh) 2024 return -EINVAL; 2025 2026 DPRINTK("resize now %ix%i\n", var.xres, var.yres); 2027 if (con_is_visible(vc)) { 2028 var.activate = FB_ACTIVATE_NOW | 2029 FB_ACTIVATE_FORCE; 2030 fb_set_var(info, &var); 2031 } 2032 var_to_display(p, &info->var, info); 2033 ops->var = info->var; 2034 } 2035 updatescrollmode(p, info, vc); 2036 return 0; 2037 } 2038 2039 static int fbcon_switch(struct vc_data *vc) 2040 { 2041 struct fb_info *info, *old_info = NULL; 2042 struct fbcon_ops *ops; 2043 struct fbcon_display *p = &fb_display[vc->vc_num]; 2044 struct fb_var_screeninfo var; 2045 int i, ret, prev_console; 2046 2047 info = registered_fb[con2fb_map[vc->vc_num]]; 2048 ops = info->fbcon_par; 2049 2050 if (logo_shown >= 0) { 2051 struct vc_data *conp2 = vc_cons[logo_shown].d; 2052 2053 if (conp2->vc_top == logo_lines 2054 && conp2->vc_bottom == conp2->vc_rows) 2055 conp2->vc_top = 0; 2056 logo_shown = FBCON_LOGO_CANSHOW; 2057 } 2058 2059 prev_console = ops->currcon; 2060 if (prev_console != -1) 2061 old_info = registered_fb[con2fb_map[prev_console]]; 2062 /* 2063 * FIXME: If we have multiple fbdev's loaded, we need to 2064 * update all info->currcon. Perhaps, we can place this 2065 * in a centralized structure, but this might break some 2066 * drivers. 2067 * 2068 * info->currcon = vc->vc_num; 2069 */ 2070 for_each_registered_fb(i) { 2071 if (registered_fb[i]->fbcon_par) { 2072 struct fbcon_ops *o = registered_fb[i]->fbcon_par; 2073 2074 o->currcon = vc->vc_num; 2075 } 2076 } 2077 memset(&var, 0, sizeof(struct fb_var_screeninfo)); 2078 display_to_var(&var, p); 2079 var.activate = FB_ACTIVATE_NOW; 2080 2081 /* 2082 * make sure we don't unnecessarily trip the memcmp() 2083 * in fb_set_var() 2084 */ 2085 info->var.activate = var.activate; 2086 var.vmode |= info->var.vmode & ~FB_VMODE_MASK; 2087 fb_set_var(info, &var); 2088 ops->var = info->var; 2089 2090 if (old_info != NULL && (old_info != info || 2091 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) { 2092 if (info->fbops->fb_set_par) { 2093 ret = info->fbops->fb_set_par(info); 2094 2095 if (ret) 2096 printk(KERN_ERR "fbcon_switch: detected " 2097 "unhandled fb_set_par error, " 2098 "error code %d\n", ret); 2099 } 2100 2101 if (old_info != info) 2102 fbcon_del_cursor_timer(old_info); 2103 } 2104 2105 if (fbcon_is_inactive(vc, info) || 2106 ops->blank_state != FB_BLANK_UNBLANK) 2107 fbcon_del_cursor_timer(info); 2108 else 2109 fbcon_add_cursor_timer(info); 2110 2111 set_blitting_type(vc, info); 2112 ops->cursor_reset = 1; 2113 2114 if (ops->rotate_font && ops->rotate_font(info, vc)) { 2115 ops->rotate = FB_ROTATE_UR; 2116 set_blitting_type(vc, info); 2117 } 2118 2119 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1); 2120 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 2121 2122 if (vc->vc_font.charcount > 256) 2123 vc->vc_complement_mask <<= 1; 2124 2125 updatescrollmode(p, info, vc); 2126 2127 switch (p->scrollmode) { 2128 case SCROLL_WRAP_MOVE: 2129 scrollback_phys_max = p->vrows - vc->vc_rows; 2130 break; 2131 case SCROLL_PAN_MOVE: 2132 case SCROLL_PAN_REDRAW: 2133 scrollback_phys_max = p->vrows - 2 * vc->vc_rows; 2134 if (scrollback_phys_max < 0) 2135 scrollback_phys_max = 0; 2136 break; 2137 default: 2138 scrollback_phys_max = 0; 2139 break; 2140 } 2141 2142 scrollback_max = 0; 2143 scrollback_current = 0; 2144 2145 if (!fbcon_is_inactive(vc, info)) { 2146 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0; 2147 ops->update_start(info); 2148 } 2149 2150 fbcon_set_palette(vc, color_table); 2151 fbcon_clear_margins(vc, 0); 2152 2153 if (logo_shown == FBCON_LOGO_DRAW) { 2154 2155 logo_shown = fg_console; 2156 /* This is protected above by initmem_freed */ 2157 fb_show_logo(info, ops->rotate); 2158 update_region(vc, 2159 vc->vc_origin + vc->vc_size_row * vc->vc_top, 2160 vc->vc_size_row * (vc->vc_bottom - 2161 vc->vc_top) / 2); 2162 return 0; 2163 } 2164 return 1; 2165 } 2166 2167 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info, 2168 int blank) 2169 { 2170 if (blank) { 2171 unsigned short charmask = vc->vc_hi_font_mask ? 2172 0x1ff : 0xff; 2173 unsigned short oldc; 2174 2175 oldc = vc->vc_video_erase_char; 2176 vc->vc_video_erase_char &= charmask; 2177 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols); 2178 vc->vc_video_erase_char = oldc; 2179 } 2180 } 2181 2182 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch) 2183 { 2184 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 2185 struct fbcon_ops *ops = info->fbcon_par; 2186 2187 if (mode_switch) { 2188 struct fb_var_screeninfo var = info->var; 2189 2190 ops->graphics = 1; 2191 2192 if (!blank) { 2193 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE | 2194 FB_ACTIVATE_KD_TEXT; 2195 fb_set_var(info, &var); 2196 ops->graphics = 0; 2197 ops->var = info->var; 2198 } 2199 } 2200 2201 if (!fbcon_is_inactive(vc, info)) { 2202 if (ops->blank_state != blank) { 2203 ops->blank_state = blank; 2204 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW); 2205 ops->cursor_flash = (!blank); 2206 2207 if (fb_blank(info, blank)) 2208 fbcon_generic_blank(vc, info, blank); 2209 } 2210 2211 if (!blank) 2212 update_screen(vc); 2213 } 2214 2215 if (mode_switch || fbcon_is_inactive(vc, info) || 2216 ops->blank_state != FB_BLANK_UNBLANK) 2217 fbcon_del_cursor_timer(info); 2218 else 2219 fbcon_add_cursor_timer(info); 2220 2221 return 0; 2222 } 2223 2224 static int fbcon_debug_enter(struct vc_data *vc) 2225 { 2226 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 2227 struct fbcon_ops *ops = info->fbcon_par; 2228 2229 ops->save_graphics = ops->graphics; 2230 ops->graphics = 0; 2231 if (info->fbops->fb_debug_enter) 2232 info->fbops->fb_debug_enter(info); 2233 fbcon_set_palette(vc, color_table); 2234 return 0; 2235 } 2236 2237 static int fbcon_debug_leave(struct vc_data *vc) 2238 { 2239 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 2240 struct fbcon_ops *ops = info->fbcon_par; 2241 2242 ops->graphics = ops->save_graphics; 2243 if (info->fbops->fb_debug_leave) 2244 info->fbops->fb_debug_leave(info); 2245 return 0; 2246 } 2247 2248 static int fbcon_get_font(struct vc_data *vc, struct console_font *font) 2249 { 2250 u8 *fontdata = vc->vc_font.data; 2251 u8 *data = font->data; 2252 int i, j; 2253 2254 font->width = vc->vc_font.width; 2255 font->height = vc->vc_font.height; 2256 font->charcount = vc->vc_hi_font_mask ? 512 : 256; 2257 if (!font->data) 2258 return 0; 2259 2260 if (font->width <= 8) { 2261 j = vc->vc_font.height; 2262 if (font->charcount * j > FNTSIZE(fontdata)) 2263 return -EINVAL; 2264 2265 for (i = 0; i < font->charcount; i++) { 2266 memcpy(data, fontdata, j); 2267 memset(data + j, 0, 32 - j); 2268 data += 32; 2269 fontdata += j; 2270 } 2271 } else if (font->width <= 16) { 2272 j = vc->vc_font.height * 2; 2273 if (font->charcount * j > FNTSIZE(fontdata)) 2274 return -EINVAL; 2275 2276 for (i = 0; i < font->charcount; i++) { 2277 memcpy(data, fontdata, j); 2278 memset(data + j, 0, 64 - j); 2279 data += 64; 2280 fontdata += j; 2281 } 2282 } else if (font->width <= 24) { 2283 if (font->charcount * (vc->vc_font.height * sizeof(u32)) > FNTSIZE(fontdata)) 2284 return -EINVAL; 2285 2286 for (i = 0; i < font->charcount; i++) { 2287 for (j = 0; j < vc->vc_font.height; j++) { 2288 *data++ = fontdata[0]; 2289 *data++ = fontdata[1]; 2290 *data++ = fontdata[2]; 2291 fontdata += sizeof(u32); 2292 } 2293 memset(data, 0, 3 * (32 - j)); 2294 data += 3 * (32 - j); 2295 } 2296 } else { 2297 j = vc->vc_font.height * 4; 2298 if (font->charcount * j > FNTSIZE(fontdata)) 2299 return -EINVAL; 2300 2301 for (i = 0; i < font->charcount; i++) { 2302 memcpy(data, fontdata, j); 2303 memset(data + j, 0, 128 - j); 2304 data += 128; 2305 fontdata += j; 2306 } 2307 } 2308 return 0; 2309 } 2310 2311 /* set/clear vc_hi_font_mask and update vc attrs accordingly */ 2312 static void set_vc_hi_font(struct vc_data *vc, bool set) 2313 { 2314 if (!set) { 2315 vc->vc_hi_font_mask = 0; 2316 if (vc->vc_can_do_color) { 2317 vc->vc_complement_mask >>= 1; 2318 vc->vc_s_complement_mask >>= 1; 2319 } 2320 2321 /* ++Edmund: reorder the attribute bits */ 2322 if (vc->vc_can_do_color) { 2323 unsigned short *cp = 2324 (unsigned short *) vc->vc_origin; 2325 int count = vc->vc_screenbuf_size / 2; 2326 unsigned short c; 2327 for (; count > 0; count--, cp++) { 2328 c = scr_readw(cp); 2329 scr_writew(((c & 0xfe00) >> 1) | 2330 (c & 0xff), cp); 2331 } 2332 c = vc->vc_video_erase_char; 2333 vc->vc_video_erase_char = 2334 ((c & 0xfe00) >> 1) | (c & 0xff); 2335 vc->vc_attr >>= 1; 2336 } 2337 } else { 2338 vc->vc_hi_font_mask = 0x100; 2339 if (vc->vc_can_do_color) { 2340 vc->vc_complement_mask <<= 1; 2341 vc->vc_s_complement_mask <<= 1; 2342 } 2343 2344 /* ++Edmund: reorder the attribute bits */ 2345 { 2346 unsigned short *cp = 2347 (unsigned short *) vc->vc_origin; 2348 int count = vc->vc_screenbuf_size / 2; 2349 unsigned short c; 2350 for (; count > 0; count--, cp++) { 2351 unsigned short newc; 2352 c = scr_readw(cp); 2353 if (vc->vc_can_do_color) 2354 newc = 2355 ((c & 0xff00) << 1) | (c & 2356 0xff); 2357 else 2358 newc = c & ~0x100; 2359 scr_writew(newc, cp); 2360 } 2361 c = vc->vc_video_erase_char; 2362 if (vc->vc_can_do_color) { 2363 vc->vc_video_erase_char = 2364 ((c & 0xff00) << 1) | (c & 0xff); 2365 vc->vc_attr <<= 1; 2366 } else 2367 vc->vc_video_erase_char = c & ~0x100; 2368 } 2369 } 2370 } 2371 2372 static int fbcon_do_set_font(struct vc_data *vc, int w, int h, int charcount, 2373 const u8 * data, int userfont) 2374 { 2375 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 2376 struct fbcon_ops *ops = info->fbcon_par; 2377 struct fbcon_display *p = &fb_display[vc->vc_num]; 2378 int resize; 2379 char *old_data = NULL; 2380 2381 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height); 2382 if (p->userfont) 2383 old_data = vc->vc_font.data; 2384 vc->vc_font.data = (void *)(p->fontdata = data); 2385 if ((p->userfont = userfont)) 2386 REFCOUNT(data)++; 2387 vc->vc_font.width = w; 2388 vc->vc_font.height = h; 2389 vc->vc_font.charcount = charcount; 2390 if (vc->vc_hi_font_mask && charcount == 256) 2391 set_vc_hi_font(vc, false); 2392 else if (!vc->vc_hi_font_mask && charcount == 512) 2393 set_vc_hi_font(vc, true); 2394 2395 if (resize) { 2396 int cols, rows; 2397 2398 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 2399 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 2400 cols /= w; 2401 rows /= h; 2402 vc_resize(vc, cols, rows); 2403 } else if (con_is_visible(vc) 2404 && vc->vc_mode == KD_TEXT) { 2405 fbcon_clear_margins(vc, 0); 2406 update_screen(vc); 2407 } 2408 2409 if (old_data && (--REFCOUNT(old_data) == 0)) 2410 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int)); 2411 return 0; 2412 } 2413 2414 /* 2415 * User asked to set font; we are guaranteed that 2416 * a) width and height are in range 1..32 2417 * b) charcount does not exceed 512 2418 * but lets not assume that, since someone might someday want to use larger 2419 * fonts. And charcount of 512 is small for unicode support. 2420 * 2421 * However, user space gives the font in 32 rows , regardless of 2422 * actual font height. So a new API is needed if support for larger fonts 2423 * is ever implemented. 2424 */ 2425 2426 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, 2427 unsigned int flags) 2428 { 2429 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 2430 unsigned charcount = font->charcount; 2431 int w = font->width; 2432 int h = font->height; 2433 int size; 2434 int i, csum; 2435 u8 *new_data, *data = font->data; 2436 int pitch = PITCH(font->width); 2437 2438 /* Is there a reason why fbconsole couldn't handle any charcount >256? 2439 * If not this check should be changed to charcount < 256 */ 2440 if (charcount != 256 && charcount != 512) 2441 return -EINVAL; 2442 2443 /* Make sure drawing engine can handle the font */ 2444 if (!(info->pixmap.blit_x & (1 << (font->width - 1))) || 2445 !(info->pixmap.blit_y & (1 << (font->height - 1)))) 2446 return -EINVAL; 2447 2448 /* Make sure driver can handle the font length */ 2449 if (fbcon_invalid_charcount(info, charcount)) 2450 return -EINVAL; 2451 2452 size = CALC_FONTSZ(h, pitch, charcount); 2453 2454 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER); 2455 2456 if (!new_data) 2457 return -ENOMEM; 2458 2459 memset(new_data, 0, FONT_EXTRA_WORDS * sizeof(int)); 2460 2461 new_data += FONT_EXTRA_WORDS * sizeof(int); 2462 FNTSIZE(new_data) = size; 2463 REFCOUNT(new_data) = 0; /* usage counter */ 2464 for (i=0; i< charcount; i++) { 2465 memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch); 2466 } 2467 2468 /* Since linux has a nice crc32 function use it for counting font 2469 * checksums. */ 2470 csum = crc32(0, new_data, size); 2471 2472 FNTSUM(new_data) = csum; 2473 /* Check if the same font is on some other console already */ 2474 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2475 struct vc_data *tmp = vc_cons[i].d; 2476 2477 if (fb_display[i].userfont && 2478 fb_display[i].fontdata && 2479 FNTSUM(fb_display[i].fontdata) == csum && 2480 FNTSIZE(fb_display[i].fontdata) == size && 2481 tmp->vc_font.width == w && 2482 !memcmp(fb_display[i].fontdata, new_data, size)) { 2483 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int)); 2484 new_data = (u8 *)fb_display[i].fontdata; 2485 break; 2486 } 2487 } 2488 return fbcon_do_set_font(vc, font->width, font->height, charcount, new_data, 1); 2489 } 2490 2491 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name) 2492 { 2493 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 2494 const struct font_desc *f; 2495 2496 if (!name) 2497 f = get_default_font(info->var.xres, info->var.yres, 2498 info->pixmap.blit_x, info->pixmap.blit_y); 2499 else if (!(f = find_font(name))) 2500 return -ENOENT; 2501 2502 font->width = f->width; 2503 font->height = f->height; 2504 return fbcon_do_set_font(vc, f->width, f->height, f->charcount, f->data, 0); 2505 } 2506 2507 static u16 palette_red[16]; 2508 static u16 palette_green[16]; 2509 static u16 palette_blue[16]; 2510 2511 static struct fb_cmap palette_cmap = { 2512 0, 16, palette_red, palette_green, palette_blue, NULL 2513 }; 2514 2515 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table) 2516 { 2517 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 2518 int i, j, k, depth; 2519 u8 val; 2520 2521 if (fbcon_is_inactive(vc, info)) 2522 return; 2523 2524 if (!con_is_visible(vc)) 2525 return; 2526 2527 depth = fb_get_color_depth(&info->var, &info->fix); 2528 if (depth > 3) { 2529 for (i = j = 0; i < 16; i++) { 2530 k = table[i]; 2531 val = vc->vc_palette[j++]; 2532 palette_red[k] = (val << 8) | val; 2533 val = vc->vc_palette[j++]; 2534 palette_green[k] = (val << 8) | val; 2535 val = vc->vc_palette[j++]; 2536 palette_blue[k] = (val << 8) | val; 2537 } 2538 palette_cmap.len = 16; 2539 palette_cmap.start = 0; 2540 /* 2541 * If framebuffer is capable of less than 16 colors, 2542 * use default palette of fbcon. 2543 */ 2544 } else 2545 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap); 2546 2547 fb_set_cmap(&palette_cmap, info); 2548 } 2549 2550 static u16 *fbcon_screen_pos(const struct vc_data *vc, int offset) 2551 { 2552 return (u16 *) (vc->vc_origin + offset); 2553 } 2554 2555 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos, 2556 int *px, int *py) 2557 { 2558 unsigned long ret; 2559 int x, y; 2560 2561 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) { 2562 unsigned long offset = (pos - vc->vc_origin) / 2; 2563 2564 x = offset % vc->vc_cols; 2565 y = offset / vc->vc_cols; 2566 ret = pos + (vc->vc_cols - x) * 2; 2567 } else { 2568 /* Should not happen */ 2569 x = y = 0; 2570 ret = vc->vc_origin; 2571 } 2572 if (px) 2573 *px = x; 2574 if (py) 2575 *py = y; 2576 return ret; 2577 } 2578 2579 /* As we might be inside of softback, we may work with non-contiguous buffer, 2580 that's why we have to use a separate routine. */ 2581 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt) 2582 { 2583 while (cnt--) { 2584 u16 a = scr_readw(p); 2585 if (!vc->vc_can_do_color) 2586 a ^= 0x0800; 2587 else if (vc->vc_hi_font_mask == 0x100) 2588 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | 2589 (((a) & 0x0e00) << 4); 2590 else 2591 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | 2592 (((a) & 0x0700) << 4); 2593 scr_writew(a, p++); 2594 } 2595 } 2596 2597 void fbcon_suspended(struct fb_info *info) 2598 { 2599 struct vc_data *vc = NULL; 2600 struct fbcon_ops *ops = info->fbcon_par; 2601 2602 if (!ops || ops->currcon < 0) 2603 return; 2604 vc = vc_cons[ops->currcon].d; 2605 2606 /* Clear cursor, restore saved data */ 2607 fbcon_cursor(vc, CM_ERASE); 2608 } 2609 2610 void fbcon_resumed(struct fb_info *info) 2611 { 2612 struct vc_data *vc; 2613 struct fbcon_ops *ops = info->fbcon_par; 2614 2615 if (!ops || ops->currcon < 0) 2616 return; 2617 vc = vc_cons[ops->currcon].d; 2618 2619 update_screen(vc); 2620 } 2621 2622 static void fbcon_modechanged(struct fb_info *info) 2623 { 2624 struct fbcon_ops *ops = info->fbcon_par; 2625 struct vc_data *vc; 2626 struct fbcon_display *p; 2627 int rows, cols; 2628 2629 if (!ops || ops->currcon < 0) 2630 return; 2631 vc = vc_cons[ops->currcon].d; 2632 if (vc->vc_mode != KD_TEXT || 2633 registered_fb[con2fb_map[ops->currcon]] != info) 2634 return; 2635 2636 p = &fb_display[vc->vc_num]; 2637 set_blitting_type(vc, info); 2638 2639 if (con_is_visible(vc)) { 2640 var_to_display(p, &info->var, info); 2641 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 2642 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 2643 cols /= vc->vc_font.width; 2644 rows /= vc->vc_font.height; 2645 vc_resize(vc, cols, rows); 2646 updatescrollmode(p, info, vc); 2647 scrollback_max = 0; 2648 scrollback_current = 0; 2649 2650 if (!fbcon_is_inactive(vc, info)) { 2651 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0; 2652 ops->update_start(info); 2653 } 2654 2655 fbcon_set_palette(vc, color_table); 2656 update_screen(vc); 2657 } 2658 } 2659 2660 static void fbcon_set_all_vcs(struct fb_info *info) 2661 { 2662 struct fbcon_ops *ops = info->fbcon_par; 2663 struct vc_data *vc; 2664 struct fbcon_display *p; 2665 int i, rows, cols, fg = -1; 2666 2667 if (!ops || ops->currcon < 0) 2668 return; 2669 2670 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2671 vc = vc_cons[i].d; 2672 if (!vc || vc->vc_mode != KD_TEXT || 2673 registered_fb[con2fb_map[i]] != info) 2674 continue; 2675 2676 if (con_is_visible(vc)) { 2677 fg = i; 2678 continue; 2679 } 2680 2681 p = &fb_display[vc->vc_num]; 2682 set_blitting_type(vc, info); 2683 var_to_display(p, &info->var, info); 2684 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 2685 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 2686 cols /= vc->vc_font.width; 2687 rows /= vc->vc_font.height; 2688 vc_resize(vc, cols, rows); 2689 } 2690 2691 if (fg != -1) 2692 fbcon_modechanged(info); 2693 } 2694 2695 2696 void fbcon_update_vcs(struct fb_info *info, bool all) 2697 { 2698 if (all) 2699 fbcon_set_all_vcs(info); 2700 else 2701 fbcon_modechanged(info); 2702 } 2703 EXPORT_SYMBOL(fbcon_update_vcs); 2704 2705 int fbcon_mode_deleted(struct fb_info *info, 2706 struct fb_videomode *mode) 2707 { 2708 struct fb_info *fb_info; 2709 struct fbcon_display *p; 2710 int i, j, found = 0; 2711 2712 /* before deletion, ensure that mode is not in use */ 2713 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2714 j = con2fb_map[i]; 2715 if (j == -1) 2716 continue; 2717 fb_info = registered_fb[j]; 2718 if (fb_info != info) 2719 continue; 2720 p = &fb_display[i]; 2721 if (!p || !p->mode) 2722 continue; 2723 if (fb_mode_is_equal(p->mode, mode)) { 2724 found = 1; 2725 break; 2726 } 2727 } 2728 return found; 2729 } 2730 2731 #ifdef CONFIG_VT_HW_CONSOLE_BINDING 2732 static void fbcon_unbind(void) 2733 { 2734 int ret; 2735 2736 ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc, 2737 fbcon_is_default); 2738 2739 if (!ret) 2740 fbcon_has_console_bind = 0; 2741 } 2742 #else 2743 static inline void fbcon_unbind(void) {} 2744 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */ 2745 2746 /* called with console_lock held */ 2747 void fbcon_fb_unbind(struct fb_info *info) 2748 { 2749 int i, new_idx = -1, ret = 0; 2750 int idx = info->node; 2751 2752 WARN_CONSOLE_UNLOCKED(); 2753 2754 if (!fbcon_has_console_bind) 2755 return; 2756 2757 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2758 if (con2fb_map[i] != idx && 2759 con2fb_map[i] != -1) { 2760 new_idx = con2fb_map[i]; 2761 break; 2762 } 2763 } 2764 2765 if (new_idx != -1) { 2766 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2767 if (con2fb_map[i] == idx) 2768 set_con2fb_map(i, new_idx, 0); 2769 } 2770 } else { 2771 struct fb_info *info = registered_fb[idx]; 2772 2773 /* This is sort of like set_con2fb_map, except it maps 2774 * the consoles to no device and then releases the 2775 * oldinfo to free memory and cancel the cursor blink 2776 * timer. I can imagine this just becoming part of 2777 * set_con2fb_map where new_idx is -1 2778 */ 2779 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2780 if (con2fb_map[i] == idx) { 2781 con2fb_map[i] = -1; 2782 if (!search_fb_in_map(idx)) { 2783 ret = con2fb_release_oldinfo(vc_cons[i].d, 2784 info, NULL, i, 2785 idx, 0); 2786 if (ret) { 2787 con2fb_map[i] = idx; 2788 return; 2789 } 2790 } 2791 } 2792 } 2793 fbcon_unbind(); 2794 } 2795 } 2796 2797 /* called with console_lock held */ 2798 void fbcon_fb_unregistered(struct fb_info *info) 2799 { 2800 int i, idx; 2801 2802 WARN_CONSOLE_UNLOCKED(); 2803 2804 if (deferred_takeover) 2805 return; 2806 2807 idx = info->node; 2808 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2809 if (con2fb_map[i] == idx) 2810 con2fb_map[i] = -1; 2811 } 2812 2813 if (idx == info_idx) { 2814 info_idx = -1; 2815 2816 for_each_registered_fb(i) { 2817 info_idx = i; 2818 break; 2819 } 2820 } 2821 2822 if (info_idx != -1) { 2823 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2824 if (con2fb_map[i] == -1) 2825 con2fb_map[i] = info_idx; 2826 } 2827 } 2828 2829 if (primary_device == idx) 2830 primary_device = -1; 2831 2832 if (!num_registered_fb) 2833 do_unregister_con_driver(&fb_con); 2834 } 2835 2836 void fbcon_remap_all(struct fb_info *info) 2837 { 2838 int i, idx = info->node; 2839 2840 console_lock(); 2841 if (deferred_takeover) { 2842 for (i = first_fb_vc; i <= last_fb_vc; i++) 2843 con2fb_map_boot[i] = idx; 2844 fbcon_map_override(); 2845 console_unlock(); 2846 return; 2847 } 2848 2849 for (i = first_fb_vc; i <= last_fb_vc; i++) 2850 set_con2fb_map(i, idx, 0); 2851 2852 if (con_is_bound(&fb_con)) { 2853 printk(KERN_INFO "fbcon: Remapping primary device, " 2854 "fb%i, to tty %i-%i\n", idx, 2855 first_fb_vc + 1, last_fb_vc + 1); 2856 info_idx = idx; 2857 } 2858 console_unlock(); 2859 } 2860 2861 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY 2862 static void fbcon_select_primary(struct fb_info *info) 2863 { 2864 if (!map_override && primary_device == -1 && 2865 fb_is_primary_device(info)) { 2866 int i; 2867 2868 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n", 2869 info->fix.id, info->node); 2870 primary_device = info->node; 2871 2872 for (i = first_fb_vc; i <= last_fb_vc; i++) 2873 con2fb_map_boot[i] = primary_device; 2874 2875 if (con_is_bound(&fb_con)) { 2876 printk(KERN_INFO "fbcon: Remapping primary device, " 2877 "fb%i, to tty %i-%i\n", info->node, 2878 first_fb_vc + 1, last_fb_vc + 1); 2879 info_idx = primary_device; 2880 } 2881 } 2882 2883 } 2884 #else 2885 static inline void fbcon_select_primary(struct fb_info *info) 2886 { 2887 return; 2888 } 2889 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */ 2890 2891 /* called with console_lock held */ 2892 int fbcon_fb_registered(struct fb_info *info) 2893 { 2894 int ret = 0, i, idx; 2895 2896 WARN_CONSOLE_UNLOCKED(); 2897 2898 idx = info->node; 2899 fbcon_select_primary(info); 2900 2901 if (deferred_takeover) { 2902 pr_info("fbcon: Deferring console take-over\n"); 2903 return 0; 2904 } 2905 2906 if (info_idx == -1) { 2907 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2908 if (con2fb_map_boot[i] == idx) { 2909 info_idx = idx; 2910 break; 2911 } 2912 } 2913 2914 if (info_idx != -1) 2915 ret = do_fbcon_takeover(1); 2916 } else { 2917 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2918 if (con2fb_map_boot[i] == idx) 2919 set_con2fb_map(i, idx, 0); 2920 } 2921 } 2922 2923 return ret; 2924 } 2925 2926 void fbcon_fb_blanked(struct fb_info *info, int blank) 2927 { 2928 struct fbcon_ops *ops = info->fbcon_par; 2929 struct vc_data *vc; 2930 2931 if (!ops || ops->currcon < 0) 2932 return; 2933 2934 vc = vc_cons[ops->currcon].d; 2935 if (vc->vc_mode != KD_TEXT || 2936 registered_fb[con2fb_map[ops->currcon]] != info) 2937 return; 2938 2939 if (con_is_visible(vc)) { 2940 if (blank) 2941 do_blank_screen(0); 2942 else 2943 do_unblank_screen(0); 2944 } 2945 ops->blank_state = blank; 2946 } 2947 2948 void fbcon_new_modelist(struct fb_info *info) 2949 { 2950 int i; 2951 struct vc_data *vc; 2952 struct fb_var_screeninfo var; 2953 const struct fb_videomode *mode; 2954 2955 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2956 if (registered_fb[con2fb_map[i]] != info) 2957 continue; 2958 if (!fb_display[i].mode) 2959 continue; 2960 vc = vc_cons[i].d; 2961 display_to_var(&var, &fb_display[i]); 2962 mode = fb_find_nearest_mode(fb_display[i].mode, 2963 &info->modelist); 2964 fb_videomode_to_var(&var, mode); 2965 fbcon_set_disp(info, &var, vc->vc_num); 2966 } 2967 } 2968 2969 void fbcon_get_requirement(struct fb_info *info, 2970 struct fb_blit_caps *caps) 2971 { 2972 struct vc_data *vc; 2973 2974 if (caps->flags) { 2975 int i, charcnt; 2976 2977 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2978 vc = vc_cons[i].d; 2979 if (vc && vc->vc_mode == KD_TEXT && 2980 info->node == con2fb_map[i]) { 2981 caps->x |= 1 << (vc->vc_font.width - 1); 2982 caps->y |= 1 << (vc->vc_font.height - 1); 2983 charcnt = vc->vc_font.charcount; 2984 if (caps->len < charcnt) 2985 caps->len = charcnt; 2986 } 2987 } 2988 } else { 2989 vc = vc_cons[fg_console].d; 2990 2991 if (vc && vc->vc_mode == KD_TEXT && 2992 info->node == con2fb_map[fg_console]) { 2993 caps->x = 1 << (vc->vc_font.width - 1); 2994 caps->y = 1 << (vc->vc_font.height - 1); 2995 caps->len = vc->vc_font.charcount; 2996 } 2997 } 2998 } 2999 3000 int fbcon_set_con2fb_map_ioctl(void __user *argp) 3001 { 3002 struct fb_con2fbmap con2fb; 3003 int ret; 3004 3005 if (copy_from_user(&con2fb, argp, sizeof(con2fb))) 3006 return -EFAULT; 3007 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) 3008 return -EINVAL; 3009 if (con2fb.framebuffer >= FB_MAX) 3010 return -EINVAL; 3011 if (!registered_fb[con2fb.framebuffer]) 3012 request_module("fb%d", con2fb.framebuffer); 3013 if (!registered_fb[con2fb.framebuffer]) { 3014 return -EINVAL; 3015 } 3016 3017 console_lock(); 3018 ret = set_con2fb_map(con2fb.console - 1, 3019 con2fb.framebuffer, 1); 3020 console_unlock(); 3021 3022 return ret; 3023 } 3024 3025 int fbcon_get_con2fb_map_ioctl(void __user *argp) 3026 { 3027 struct fb_con2fbmap con2fb; 3028 3029 if (copy_from_user(&con2fb, argp, sizeof(con2fb))) 3030 return -EFAULT; 3031 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) 3032 return -EINVAL; 3033 3034 console_lock(); 3035 con2fb.framebuffer = con2fb_map[con2fb.console - 1]; 3036 console_unlock(); 3037 3038 return copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0; 3039 } 3040 3041 /* 3042 * The console `switch' structure for the frame buffer based console 3043 */ 3044 3045 static const struct consw fb_con = { 3046 .owner = THIS_MODULE, 3047 .con_startup = fbcon_startup, 3048 .con_init = fbcon_init, 3049 .con_deinit = fbcon_deinit, 3050 .con_clear = fbcon_clear, 3051 .con_putc = fbcon_putc, 3052 .con_putcs = fbcon_putcs, 3053 .con_cursor = fbcon_cursor, 3054 .con_scroll = fbcon_scroll, 3055 .con_switch = fbcon_switch, 3056 .con_blank = fbcon_blank, 3057 .con_font_set = fbcon_set_font, 3058 .con_font_get = fbcon_get_font, 3059 .con_font_default = fbcon_set_def_font, 3060 .con_set_palette = fbcon_set_palette, 3061 .con_invert_region = fbcon_invert_region, 3062 .con_screen_pos = fbcon_screen_pos, 3063 .con_getxy = fbcon_getxy, 3064 .con_resize = fbcon_resize, 3065 .con_debug_enter = fbcon_debug_enter, 3066 .con_debug_leave = fbcon_debug_leave, 3067 }; 3068 3069 static ssize_t store_rotate(struct device *device, 3070 struct device_attribute *attr, const char *buf, 3071 size_t count) 3072 { 3073 struct fb_info *info; 3074 int rotate, idx; 3075 char **last = NULL; 3076 3077 console_lock(); 3078 idx = con2fb_map[fg_console]; 3079 3080 if (idx == -1 || registered_fb[idx] == NULL) 3081 goto err; 3082 3083 info = registered_fb[idx]; 3084 rotate = simple_strtoul(buf, last, 0); 3085 fbcon_rotate(info, rotate); 3086 err: 3087 console_unlock(); 3088 return count; 3089 } 3090 3091 static ssize_t store_rotate_all(struct device *device, 3092 struct device_attribute *attr,const char *buf, 3093 size_t count) 3094 { 3095 struct fb_info *info; 3096 int rotate, idx; 3097 char **last = NULL; 3098 3099 console_lock(); 3100 idx = con2fb_map[fg_console]; 3101 3102 if (idx == -1 || registered_fb[idx] == NULL) 3103 goto err; 3104 3105 info = registered_fb[idx]; 3106 rotate = simple_strtoul(buf, last, 0); 3107 fbcon_rotate_all(info, rotate); 3108 err: 3109 console_unlock(); 3110 return count; 3111 } 3112 3113 static ssize_t show_rotate(struct device *device, 3114 struct device_attribute *attr,char *buf) 3115 { 3116 struct fb_info *info; 3117 int rotate = 0, idx; 3118 3119 console_lock(); 3120 idx = con2fb_map[fg_console]; 3121 3122 if (idx == -1 || registered_fb[idx] == NULL) 3123 goto err; 3124 3125 info = registered_fb[idx]; 3126 rotate = fbcon_get_rotate(info); 3127 err: 3128 console_unlock(); 3129 return snprintf(buf, PAGE_SIZE, "%d\n", rotate); 3130 } 3131 3132 static ssize_t show_cursor_blink(struct device *device, 3133 struct device_attribute *attr, char *buf) 3134 { 3135 struct fb_info *info; 3136 struct fbcon_ops *ops; 3137 int idx, blink = -1; 3138 3139 console_lock(); 3140 idx = con2fb_map[fg_console]; 3141 3142 if (idx == -1 || registered_fb[idx] == NULL) 3143 goto err; 3144 3145 info = registered_fb[idx]; 3146 ops = info->fbcon_par; 3147 3148 if (!ops) 3149 goto err; 3150 3151 blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0; 3152 err: 3153 console_unlock(); 3154 return snprintf(buf, PAGE_SIZE, "%d\n", blink); 3155 } 3156 3157 static ssize_t store_cursor_blink(struct device *device, 3158 struct device_attribute *attr, 3159 const char *buf, size_t count) 3160 { 3161 struct fb_info *info; 3162 int blink, idx; 3163 char **last = NULL; 3164 3165 console_lock(); 3166 idx = con2fb_map[fg_console]; 3167 3168 if (idx == -1 || registered_fb[idx] == NULL) 3169 goto err; 3170 3171 info = registered_fb[idx]; 3172 3173 if (!info->fbcon_par) 3174 goto err; 3175 3176 blink = simple_strtoul(buf, last, 0); 3177 3178 if (blink) { 3179 fbcon_cursor_noblink = 0; 3180 fbcon_add_cursor_timer(info); 3181 } else { 3182 fbcon_cursor_noblink = 1; 3183 fbcon_del_cursor_timer(info); 3184 } 3185 3186 err: 3187 console_unlock(); 3188 return count; 3189 } 3190 3191 static struct device_attribute device_attrs[] = { 3192 __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate), 3193 __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all), 3194 __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink, 3195 store_cursor_blink), 3196 }; 3197 3198 static int fbcon_init_device(void) 3199 { 3200 int i, error = 0; 3201 3202 fbcon_has_sysfs = 1; 3203 3204 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) { 3205 error = device_create_file(fbcon_device, &device_attrs[i]); 3206 3207 if (error) 3208 break; 3209 } 3210 3211 if (error) { 3212 while (--i >= 0) 3213 device_remove_file(fbcon_device, &device_attrs[i]); 3214 3215 fbcon_has_sysfs = 0; 3216 } 3217 3218 return 0; 3219 } 3220 3221 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 3222 static void fbcon_register_existing_fbs(struct work_struct *work) 3223 { 3224 int i; 3225 3226 console_lock(); 3227 3228 for_each_registered_fb(i) 3229 fbcon_fb_registered(registered_fb[i]); 3230 3231 console_unlock(); 3232 } 3233 3234 static struct notifier_block fbcon_output_nb; 3235 static DECLARE_WORK(fbcon_deferred_takeover_work, fbcon_register_existing_fbs); 3236 3237 static int fbcon_output_notifier(struct notifier_block *nb, 3238 unsigned long action, void *data) 3239 { 3240 WARN_CONSOLE_UNLOCKED(); 3241 3242 pr_info("fbcon: Taking over console\n"); 3243 3244 dummycon_unregister_output_notifier(&fbcon_output_nb); 3245 deferred_takeover = false; 3246 logo_shown = FBCON_LOGO_DONTSHOW; 3247 3248 /* We may get called in atomic context */ 3249 schedule_work(&fbcon_deferred_takeover_work); 3250 3251 return NOTIFY_OK; 3252 } 3253 #endif 3254 3255 static void fbcon_start(void) 3256 { 3257 WARN_CONSOLE_UNLOCKED(); 3258 3259 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 3260 if (conswitchp != &dummy_con) 3261 deferred_takeover = false; 3262 3263 if (deferred_takeover) { 3264 fbcon_output_nb.notifier_call = fbcon_output_notifier; 3265 dummycon_register_output_notifier(&fbcon_output_nb); 3266 return; 3267 } 3268 #endif 3269 3270 if (num_registered_fb) { 3271 int i; 3272 3273 for_each_registered_fb(i) { 3274 info_idx = i; 3275 break; 3276 } 3277 3278 do_fbcon_takeover(0); 3279 } 3280 } 3281 3282 static void fbcon_exit(void) 3283 { 3284 struct fb_info *info; 3285 int i, j, mapped; 3286 3287 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 3288 if (deferred_takeover) { 3289 dummycon_unregister_output_notifier(&fbcon_output_nb); 3290 deferred_takeover = false; 3291 } 3292 #endif 3293 3294 for_each_registered_fb(i) { 3295 int pending = 0; 3296 3297 mapped = 0; 3298 info = registered_fb[i]; 3299 3300 if (info->queue.func) 3301 pending = cancel_work_sync(&info->queue); 3302 DPRINTK("fbcon: %s pending work\n", (pending ? "canceled" : 3303 "no")); 3304 3305 for (j = first_fb_vc; j <= last_fb_vc; j++) { 3306 if (con2fb_map[j] == i) { 3307 mapped = 1; 3308 con2fb_map[j] = -1; 3309 } 3310 } 3311 3312 if (mapped) { 3313 if (info->fbops->fb_release) 3314 info->fbops->fb_release(info, 0); 3315 module_put(info->fbops->owner); 3316 3317 if (info->fbcon_par) { 3318 struct fbcon_ops *ops = info->fbcon_par; 3319 3320 fbcon_del_cursor_timer(info); 3321 kfree(ops->cursor_src); 3322 kfree(ops->cursor_state.mask); 3323 kfree(info->fbcon_par); 3324 info->fbcon_par = NULL; 3325 } 3326 3327 if (info->queue.func == fb_flashcursor) 3328 info->queue.func = NULL; 3329 } 3330 } 3331 } 3332 3333 void __init fb_console_init(void) 3334 { 3335 int i; 3336 3337 console_lock(); 3338 fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL, 3339 "fbcon"); 3340 3341 if (IS_ERR(fbcon_device)) { 3342 printk(KERN_WARNING "Unable to create device " 3343 "for fbcon; errno = %ld\n", 3344 PTR_ERR(fbcon_device)); 3345 fbcon_device = NULL; 3346 } else 3347 fbcon_init_device(); 3348 3349 for (i = 0; i < MAX_NR_CONSOLES; i++) 3350 con2fb_map[i] = -1; 3351 3352 fbcon_start(); 3353 console_unlock(); 3354 } 3355 3356 #ifdef MODULE 3357 3358 static void __exit fbcon_deinit_device(void) 3359 { 3360 int i; 3361 3362 if (fbcon_has_sysfs) { 3363 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) 3364 device_remove_file(fbcon_device, &device_attrs[i]); 3365 3366 fbcon_has_sysfs = 0; 3367 } 3368 } 3369 3370 void __exit fb_console_exit(void) 3371 { 3372 console_lock(); 3373 fbcon_deinit_device(); 3374 device_destroy(fb_class, MKDEV(0, 0)); 3375 fbcon_exit(); 3376 do_unregister_con_driver(&fb_con); 3377 console_unlock(); 3378 } 3379 #endif 3380