1/* 2 * linux/drivers/video/fbcon.c -- Low level frame buffer based console driver 3 * 4 * Copyright (C) 1995 Geert Uytterhoeven 5 * 6 * 7 * This file is based on the original Amiga console driver (amicon.c): 8 * 9 * Copyright (C) 1993 Hamish Macdonald 10 * Greg Harp 11 * Copyright (C) 1994 David Carter [carter@compsci.bristol.ac.uk] 12 * 13 * with work by William Rucklidge (wjr@cs.cornell.edu) 14 * Geert Uytterhoeven 15 * Jes Sorensen (jds@kom.auc.dk) 16 * Martin Apel 17 * 18 * and on the original Atari console driver (atacon.c): 19 * 20 * Copyright (C) 1993 Bjoern Brauel 21 * Roman Hodek 22 * 23 * with work by Guenther Kelleter 24 * Martin Schaller 25 * Andreas Schwab 26 * 27 * Hardware cursor support added by Emmanuel Marty (core@ggi-project.org) 28 * Smart redraw scrolling, arbitrary font width support, 512char font support 29 * and software scrollback added by 30 * Jakub Jelinek (jj@ultra.linux.cz) 31 * 32 * Random hacking by Martin Mares <mj@ucw.cz> 33 * 34 * 2001 - Documented with DocBook 35 * - Brad Douglas <brad@neruo.com> 36 * 37 * The low level operations for the various display memory organizations are 38 * now in separate source files. 39 * 40 * Currently the following organizations are supported: 41 * 42 * o afb Amiga bitplanes 43 * o cfb{2,4,8,16,24,32} Packed pixels 44 * o ilbm Amiga interleaved bitplanes 45 * o iplan2p[248] Atari interleaved bitplanes 46 * o mfb Monochrome 47 * o vga VGA characters/attributes 48 * 49 * To do: 50 * 51 * - Implement 16 plane mode (iplan2p16) 52 * 53 * 54 * This file is subject to the terms and conditions of the GNU General Public 55 * License. See the file COPYING in the main directory of this archive for 56 * more details. 57 */ 58 59#undef FBCONDEBUG 60 61#include <linux/module.h> 62#include <linux/types.h> 63#include <linux/fs.h> 64#include <linux/kernel.h> 65#include <linux/delay.h> /* MSch: for IRQ probe */ 66#include <linux/console.h> 67#include <linux/string.h> 68#include <linux/kd.h> 69#include <linux/slab.h> 70#include <linux/fb.h> 71#include <linux/vt_kern.h> 72#include <linux/selection.h> 73#include <linux/font.h> 74#include <linux/smp.h> 75#include <linux/init.h> 76#include <linux/interrupt.h> 77#include <linux/crc32.h> /* For counting font checksums */ 78#include <asm/fb.h> 79#include <asm/irq.h> 80 81#include "fbcon.h" 82 83#ifdef FBCONDEBUG 84# define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __func__ , ## args) 85#else 86# define DPRINTK(fmt, args...) 87#endif 88 89enum { 90 FBCON_LOGO_CANSHOW = -1, /* the logo can be shown */ 91 FBCON_LOGO_DRAW = -2, /* draw the logo to a console */ 92 FBCON_LOGO_DONTSHOW = -3 /* do not show the logo */ 93}; 94 95static struct display fb_display[MAX_NR_CONSOLES]; 96 97static signed char con2fb_map[MAX_NR_CONSOLES]; 98static signed char con2fb_map_boot[MAX_NR_CONSOLES]; 99 100static int logo_lines; 101/* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO 102 enums. */ 103static int logo_shown = FBCON_LOGO_CANSHOW; 104/* Software scrollback */ 105static int fbcon_softback_size = 32768; 106static unsigned long softback_buf, softback_curr; 107static unsigned long softback_in; 108static unsigned long softback_top, softback_end; 109static int softback_lines; 110/* console mappings */ 111static int first_fb_vc; 112static int last_fb_vc = MAX_NR_CONSOLES - 1; 113static int fbcon_is_default = 1; 114static int fbcon_has_exited; 115static int primary_device = -1; 116static int fbcon_has_console_bind; 117 118#ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY 119static int map_override; 120 121static inline void fbcon_map_override(void) 122{ 123 map_override = 1; 124} 125#else 126static inline void fbcon_map_override(void) 127{ 128} 129#endif /* CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY */ 130 131/* font data */ 132static char fontname[40]; 133 134/* current fb_info */ 135static int info_idx = -1; 136 137/* console rotation */ 138static int initial_rotation; 139static int fbcon_has_sysfs; 140 141static const struct consw fb_con; 142 143#define CM_SOFTBACK (8) 144 145#define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row) 146 147static int fbcon_set_origin(struct vc_data *); 148 149static int fbcon_cursor_noblink; 150 151#define divides(a, b) ((!(a) || (b)%(a)) ? 0 : 1) 152 153/* 154 * Interface used by the world 155 */ 156 157static const char *fbcon_startup(void); 158static void fbcon_init(struct vc_data *vc, int init); 159static void fbcon_deinit(struct vc_data *vc); 160static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height, 161 int width); 162static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos); 163static void fbcon_putcs(struct vc_data *vc, const unsigned short *s, 164 int count, int ypos, int xpos); 165static void fbcon_clear_margins(struct vc_data *vc, int bottom_only); 166static void fbcon_cursor(struct vc_data *vc, int mode); 167static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir, 168 int count); 169static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx, 170 int height, int width); 171static int fbcon_switch(struct vc_data *vc); 172static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch); 173static int fbcon_set_palette(struct vc_data *vc, unsigned char *table); 174static int fbcon_scrolldelta(struct vc_data *vc, int lines); 175 176/* 177 * Internal routines 178 */ 179static __inline__ void ywrap_up(struct vc_data *vc, int count); 180static __inline__ void ywrap_down(struct vc_data *vc, int count); 181static __inline__ void ypan_up(struct vc_data *vc, int count); 182static __inline__ void ypan_down(struct vc_data *vc, int count); 183static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx, 184 int dy, int dx, int height, int width, u_int y_break); 185static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var, 186 int unit); 187static void fbcon_redraw_move(struct vc_data *vc, struct display *p, 188 int line, int count, int dy); 189static void fbcon_modechanged(struct fb_info *info); 190static void fbcon_set_all_vcs(struct fb_info *info); 191static void fbcon_start(void); 192static void fbcon_exit(void); 193static struct device *fbcon_device; 194 195#ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION 196static inline void fbcon_set_rotation(struct fb_info *info) 197{ 198 struct fbcon_ops *ops = info->fbcon_par; 199 200 if (!(info->flags & FBINFO_MISC_TILEBLITTING) && 201 ops->p->con_rotate < 4) 202 ops->rotate = ops->p->con_rotate; 203 else 204 ops->rotate = 0; 205} 206 207static void fbcon_rotate(struct fb_info *info, u32 rotate) 208{ 209 struct fbcon_ops *ops= info->fbcon_par; 210 struct fb_info *fb_info; 211 212 if (!ops || ops->currcon == -1) 213 return; 214 215 fb_info = registered_fb[con2fb_map[ops->currcon]]; 216 217 if (info == fb_info) { 218 struct display *p = &fb_display[ops->currcon]; 219 220 if (rotate < 4) 221 p->con_rotate = rotate; 222 else 223 p->con_rotate = 0; 224 225 fbcon_modechanged(info); 226 } 227} 228 229static void fbcon_rotate_all(struct fb_info *info, u32 rotate) 230{ 231 struct fbcon_ops *ops = info->fbcon_par; 232 struct vc_data *vc; 233 struct display *p; 234 int i; 235 236 if (!ops || ops->currcon < 0 || rotate > 3) 237 return; 238 239 for (i = first_fb_vc; i <= last_fb_vc; i++) { 240 vc = vc_cons[i].d; 241 if (!vc || vc->vc_mode != KD_TEXT || 242 registered_fb[con2fb_map[i]] != info) 243 continue; 244 245 p = &fb_display[vc->vc_num]; 246 p->con_rotate = rotate; 247 } 248 249 fbcon_set_all_vcs(info); 250} 251#else 252static inline void fbcon_set_rotation(struct fb_info *info) 253{ 254 struct fbcon_ops *ops = info->fbcon_par; 255 256 ops->rotate = FB_ROTATE_UR; 257} 258 259static void fbcon_rotate(struct fb_info *info, u32 rotate) 260{ 261 return; 262} 263 264static void fbcon_rotate_all(struct fb_info *info, u32 rotate) 265{ 266 return; 267} 268#endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */ 269 270static int fbcon_get_rotate(struct fb_info *info) 271{ 272 struct fbcon_ops *ops = info->fbcon_par; 273 274 return (ops) ? ops->rotate : 0; 275} 276 277static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info) 278{ 279 struct fbcon_ops *ops = info->fbcon_par; 280 281 return (info->state != FBINFO_STATE_RUNNING || 282 vc->vc_mode != KD_TEXT || ops->graphics) && 283 !vt_force_oops_output(vc); 284} 285 286static int get_color(struct vc_data *vc, struct fb_info *info, 287 u16 c, int is_fg) 288{ 289 int depth = fb_get_color_depth(&info->var, &info->fix); 290 int color = 0; 291 292 if (console_blanked) { 293 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff; 294 295 c = vc->vc_video_erase_char & charmask; 296 } 297 298 if (depth != 1) 299 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c) 300 : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c); 301 302 switch (depth) { 303 case 1: 304 { 305 int col = mono_col(info); 306 /* 0 or 1 */ 307 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0; 308 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col; 309 310 if (console_blanked) 311 fg = bg; 312 313 color = (is_fg) ? fg : bg; 314 break; 315 } 316 case 2: 317 /* 318 * Scale down 16-colors to 4 colors. Default 4-color palette 319 * is grayscale. However, simply dividing the values by 4 320 * will not work, as colors 1, 2 and 3 will be scaled-down 321 * to zero rendering them invisible. So empirically convert 322 * colors to a sane 4-level grayscale. 323 */ 324 switch (color) { 325 case 0: 326 color = 0; /* black */ 327 break; 328 case 1 ... 6: 329 color = 2; /* white */ 330 break; 331 case 7 ... 8: 332 color = 1; /* gray */ 333 break; 334 default: 335 color = 3; /* intense white */ 336 break; 337 } 338 break; 339 case 3: 340 /* 341 * Last 8 entries of default 16-color palette is a more intense 342 * version of the first 8 (i.e., same chrominance, different 343 * luminance). 344 */ 345 color &= 7; 346 break; 347 } 348 349 350 return color; 351} 352 353static void fbcon_update_softback(struct vc_data *vc) 354{ 355 int l = fbcon_softback_size / vc->vc_size_row; 356 357 if (l > 5) 358 softback_end = softback_buf + l * vc->vc_size_row; 359 else 360 /* Smaller scrollback makes no sense, and 0 would screw 361 the operation totally */ 362 softback_top = 0; 363} 364 365static void fb_flashcursor(struct work_struct *work) 366{ 367 struct fb_info *info = container_of(work, struct fb_info, queue); 368 struct fbcon_ops *ops = info->fbcon_par; 369 struct vc_data *vc = NULL; 370 int c; 371 int mode; 372 int ret; 373 374 /* FIXME: we should sort out the unbind locking instead */ 375 /* instead we just fail to flash the cursor if we can't get 376 * the lock instead of blocking fbcon deinit */ 377 ret = console_trylock(); 378 if (ret == 0) 379 return; 380 381 if (ops && ops->currcon != -1) 382 vc = vc_cons[ops->currcon].d; 383 384 if (!vc || !CON_IS_VISIBLE(vc) || 385 registered_fb[con2fb_map[vc->vc_num]] != info || 386 vc->vc_deccm != 1) { 387 console_unlock(); 388 return; 389 } 390 391 c = scr_readw((u16 *) vc->vc_pos); 392 mode = (!ops->cursor_flash || ops->cursor_state.enable) ? 393 CM_ERASE : CM_DRAW; 394 ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1), 395 get_color(vc, info, c, 0)); 396 console_unlock(); 397} 398 399static void cursor_timer_handler(unsigned long dev_addr) 400{ 401 struct fb_info *info = (struct fb_info *) dev_addr; 402 struct fbcon_ops *ops = info->fbcon_par; 403 404 queue_work(system_power_efficient_wq, &info->queue); 405 mod_timer(&ops->cursor_timer, jiffies + HZ/5); 406} 407 408static void fbcon_add_cursor_timer(struct fb_info *info) 409{ 410 struct fbcon_ops *ops = info->fbcon_par; 411 412 if ((!info->queue.func || info->queue.func == fb_flashcursor) && 413 !(ops->flags & FBCON_FLAGS_CURSOR_TIMER) && 414 !fbcon_cursor_noblink) { 415 if (!info->queue.func) 416 INIT_WORK(&info->queue, fb_flashcursor); 417 418 init_timer(&ops->cursor_timer); 419 ops->cursor_timer.function = cursor_timer_handler; 420 ops->cursor_timer.expires = jiffies + HZ / 5; 421 ops->cursor_timer.data = (unsigned long ) info; 422 add_timer(&ops->cursor_timer); 423 ops->flags |= FBCON_FLAGS_CURSOR_TIMER; 424 } 425} 426 427static void fbcon_del_cursor_timer(struct fb_info *info) 428{ 429 struct fbcon_ops *ops = info->fbcon_par; 430 431 if (info->queue.func == fb_flashcursor && 432 ops->flags & FBCON_FLAGS_CURSOR_TIMER) { 433 del_timer_sync(&ops->cursor_timer); 434 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER; 435 } 436} 437 438#ifndef MODULE 439static int __init fb_console_setup(char *this_opt) 440{ 441 char *options; 442 int i, j; 443 444 if (!this_opt || !*this_opt) 445 return 1; 446 447 while ((options = strsep(&this_opt, ",")) != NULL) { 448 if (!strncmp(options, "font:", 5)) { 449 strlcpy(fontname, options + 5, sizeof(fontname)); 450 continue; 451 } 452 453 if (!strncmp(options, "scrollback:", 11)) { 454 options += 11; 455 if (*options) { 456 fbcon_softback_size = simple_strtoul(options, &options, 0); 457 if (*options == 'k' || *options == 'K') { 458 fbcon_softback_size *= 1024; 459 } 460 } 461 continue; 462 } 463 464 if (!strncmp(options, "map:", 4)) { 465 options += 4; 466 if (*options) { 467 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) { 468 if (!options[j]) 469 j = 0; 470 con2fb_map_boot[i] = 471 (options[j++]-'0') % FB_MAX; 472 } 473 474 fbcon_map_override(); 475 } 476 continue; 477 } 478 479 if (!strncmp(options, "vc:", 3)) { 480 options += 3; 481 if (*options) 482 first_fb_vc = simple_strtoul(options, &options, 10) - 1; 483 if (first_fb_vc < 0) 484 first_fb_vc = 0; 485 if (*options++ == '-') 486 last_fb_vc = simple_strtoul(options, &options, 10) - 1; 487 fbcon_is_default = 0; 488 continue; 489 } 490 491 if (!strncmp(options, "rotate:", 7)) { 492 options += 7; 493 if (*options) 494 initial_rotation = simple_strtoul(options, &options, 0); 495 if (initial_rotation > 3) 496 initial_rotation = 0; 497 continue; 498 } 499 } 500 return 1; 501} 502 503__setup("fbcon=", fb_console_setup); 504#endif 505 506static int search_fb_in_map(int idx) 507{ 508 int i, retval = 0; 509 510 for (i = first_fb_vc; i <= last_fb_vc; i++) { 511 if (con2fb_map[i] == idx) 512 retval = 1; 513 } 514 return retval; 515} 516 517static int search_for_mapped_con(void) 518{ 519 int i, retval = 0; 520 521 for (i = first_fb_vc; i <= last_fb_vc; i++) { 522 if (con2fb_map[i] != -1) 523 retval = 1; 524 } 525 return retval; 526} 527 528static int do_fbcon_takeover(int show_logo) 529{ 530 int err, i; 531 532 if (!num_registered_fb) 533 return -ENODEV; 534 535 if (!show_logo) 536 logo_shown = FBCON_LOGO_DONTSHOW; 537 538 for (i = first_fb_vc; i <= last_fb_vc; i++) 539 con2fb_map[i] = info_idx; 540 541 err = do_take_over_console(&fb_con, first_fb_vc, last_fb_vc, 542 fbcon_is_default); 543 544 if (err) { 545 for (i = first_fb_vc; i <= last_fb_vc; i++) 546 con2fb_map[i] = -1; 547 info_idx = -1; 548 } else { 549 fbcon_has_console_bind = 1; 550 } 551 552 return err; 553} 554 555#ifdef MODULE 556static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info, 557 int cols, int rows, int new_cols, int new_rows) 558{ 559 logo_shown = FBCON_LOGO_DONTSHOW; 560} 561#else 562static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info, 563 int cols, int rows, int new_cols, int new_rows) 564{ 565 /* Need to make room for the logo */ 566 struct fbcon_ops *ops = info->fbcon_par; 567 int cnt, erase = vc->vc_video_erase_char, step; 568 unsigned short *save = NULL, *r, *q; 569 int logo_height; 570 571 if (info->flags & FBINFO_MODULE) { 572 logo_shown = FBCON_LOGO_DONTSHOW; 573 return; 574 } 575 576 /* 577 * remove underline attribute from erase character 578 * if black and white framebuffer. 579 */ 580 if (fb_get_color_depth(&info->var, &info->fix) == 1) 581 erase &= ~0x400; 582 logo_height = fb_prepare_logo(info, ops->rotate); 583 logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height); 584 q = (unsigned short *) (vc->vc_origin + 585 vc->vc_size_row * rows); 586 step = logo_lines * cols; 587 for (r = q - logo_lines * cols; r < q; r++) 588 if (scr_readw(r) != vc->vc_video_erase_char) 589 break; 590 if (r != q && new_rows >= rows + logo_lines) { 591 save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL); 592 if (save) { 593 int i = cols < new_cols ? cols : new_cols; 594 scr_memsetw(save, erase, logo_lines * new_cols * 2); 595 r = q - step; 596 for (cnt = 0; cnt < logo_lines; cnt++, r += i) 597 scr_memcpyw(save + cnt * new_cols, r, 2 * i); 598 r = q; 599 } 600 } 601 if (r == q) { 602 /* We can scroll screen down */ 603 r = q - step - cols; 604 for (cnt = rows - logo_lines; cnt > 0; cnt--) { 605 scr_memcpyw(r + step, r, vc->vc_size_row); 606 r -= cols; 607 } 608 if (!save) { 609 int lines; 610 if (vc->vc_y + logo_lines >= rows) 611 lines = rows - vc->vc_y - 1; 612 else 613 lines = logo_lines; 614 vc->vc_y += lines; 615 vc->vc_pos += lines * vc->vc_size_row; 616 } 617 } 618 scr_memsetw((unsigned short *) vc->vc_origin, 619 erase, 620 vc->vc_size_row * logo_lines); 621 622 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) { 623 fbcon_clear_margins(vc, 0); 624 update_screen(vc); 625 } 626 627 if (save) { 628 q = (unsigned short *) (vc->vc_origin + 629 vc->vc_size_row * 630 rows); 631 scr_memcpyw(q, save, logo_lines * new_cols * 2); 632 vc->vc_y += logo_lines; 633 vc->vc_pos += logo_lines * vc->vc_size_row; 634 kfree(save); 635 } 636 637 if (logo_lines > vc->vc_bottom) { 638 logo_shown = FBCON_LOGO_CANSHOW; 639 printk(KERN_INFO 640 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n"); 641 } else if (logo_shown != FBCON_LOGO_DONTSHOW) { 642 logo_shown = FBCON_LOGO_DRAW; 643 vc->vc_top = logo_lines; 644 } 645} 646#endif /* MODULE */ 647 648#ifdef CONFIG_FB_TILEBLITTING 649static void set_blitting_type(struct vc_data *vc, struct fb_info *info) 650{ 651 struct fbcon_ops *ops = info->fbcon_par; 652 653 ops->p = &fb_display[vc->vc_num]; 654 655 if ((info->flags & FBINFO_MISC_TILEBLITTING)) 656 fbcon_set_tileops(vc, info); 657 else { 658 fbcon_set_rotation(info); 659 fbcon_set_bitops(ops); 660 } 661} 662 663static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount) 664{ 665 int err = 0; 666 667 if (info->flags & FBINFO_MISC_TILEBLITTING && 668 info->tileops->fb_get_tilemax(info) < charcount) 669 err = 1; 670 671 return err; 672} 673#else 674static void set_blitting_type(struct vc_data *vc, struct fb_info *info) 675{ 676 struct fbcon_ops *ops = info->fbcon_par; 677 678 info->flags &= ~FBINFO_MISC_TILEBLITTING; 679 ops->p = &fb_display[vc->vc_num]; 680 fbcon_set_rotation(info); 681 fbcon_set_bitops(ops); 682} 683 684static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount) 685{ 686 return 0; 687} 688 689#endif /* CONFIG_MISC_TILEBLITTING */ 690 691 692static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info, 693 int unit, int oldidx) 694{ 695 struct fbcon_ops *ops = NULL; 696 int err = 0; 697 698 if (!try_module_get(info->fbops->owner)) 699 err = -ENODEV; 700 701 if (!err && info->fbops->fb_open && 702 info->fbops->fb_open(info, 0)) 703 err = -ENODEV; 704 705 if (!err) { 706 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL); 707 if (!ops) 708 err = -ENOMEM; 709 } 710 711 if (!err) { 712 info->fbcon_par = ops; 713 714 if (vc) 715 set_blitting_type(vc, info); 716 } 717 718 if (err) { 719 con2fb_map[unit] = oldidx; 720 module_put(info->fbops->owner); 721 } 722 723 return err; 724} 725 726static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo, 727 struct fb_info *newinfo, int unit, 728 int oldidx, int found) 729{ 730 struct fbcon_ops *ops = oldinfo->fbcon_par; 731 int err = 0, ret; 732 733 if (oldinfo->fbops->fb_release && 734 oldinfo->fbops->fb_release(oldinfo, 0)) { 735 con2fb_map[unit] = oldidx; 736 if (!found && newinfo->fbops->fb_release) 737 newinfo->fbops->fb_release(newinfo, 0); 738 if (!found) 739 module_put(newinfo->fbops->owner); 740 err = -ENODEV; 741 } 742 743 if (!err) { 744 fbcon_del_cursor_timer(oldinfo); 745 kfree(ops->cursor_state.mask); 746 kfree(ops->cursor_data); 747 kfree(ops->cursor_src); 748 kfree(ops->fontbuffer); 749 kfree(oldinfo->fbcon_par); 750 oldinfo->fbcon_par = NULL; 751 module_put(oldinfo->fbops->owner); 752 /* 753 If oldinfo and newinfo are driving the same hardware, 754 the fb_release() method of oldinfo may attempt to 755 restore the hardware state. This will leave the 756 newinfo in an undefined state. Thus, a call to 757 fb_set_par() may be needed for the newinfo. 758 */ 759 if (newinfo && newinfo->fbops->fb_set_par) { 760 ret = newinfo->fbops->fb_set_par(newinfo); 761 762 if (ret) 763 printk(KERN_ERR "con2fb_release_oldinfo: " 764 "detected unhandled fb_set_par error, " 765 "error code %d\n", ret); 766 } 767 } 768 769 return err; 770} 771 772static void con2fb_init_display(struct vc_data *vc, struct fb_info *info, 773 int unit, int show_logo) 774{ 775 struct fbcon_ops *ops = info->fbcon_par; 776 int ret; 777 778 ops->currcon = fg_console; 779 780 if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT)) { 781 ret = info->fbops->fb_set_par(info); 782 783 if (ret) 784 printk(KERN_ERR "con2fb_init_display: detected " 785 "unhandled fb_set_par error, " 786 "error code %d\n", ret); 787 } 788 789 ops->flags |= FBCON_FLAGS_INIT; 790 ops->graphics = 0; 791 fbcon_set_disp(info, &info->var, unit); 792 793 if (show_logo) { 794 struct vc_data *fg_vc = vc_cons[fg_console].d; 795 struct fb_info *fg_info = 796 registered_fb[con2fb_map[fg_console]]; 797 798 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols, 799 fg_vc->vc_rows, fg_vc->vc_cols, 800 fg_vc->vc_rows); 801 } 802 803 update_screen(vc_cons[fg_console].d); 804} 805 806/** 807 * set_con2fb_map - map console to frame buffer device 808 * @unit: virtual console number to map 809 * @newidx: frame buffer index to map virtual console to 810 * @user: user request 811 * 812 * Maps a virtual console @unit to a frame buffer device 813 * @newidx. 814 * 815 * This should be called with the console lock held. 816 */ 817static int set_con2fb_map(int unit, int newidx, int user) 818{ 819 struct vc_data *vc = vc_cons[unit].d; 820 int oldidx = con2fb_map[unit]; 821 struct fb_info *info = registered_fb[newidx]; 822 struct fb_info *oldinfo = NULL; 823 int found, err = 0; 824 825 if (oldidx == newidx) 826 return 0; 827 828 if (!info) 829 return -EINVAL; 830 831 if (!search_for_mapped_con() || !con_is_bound(&fb_con)) { 832 info_idx = newidx; 833 return do_fbcon_takeover(0); 834 } 835 836 if (oldidx != -1) 837 oldinfo = registered_fb[oldidx]; 838 839 found = search_fb_in_map(newidx); 840 841 con2fb_map[unit] = newidx; 842 if (!err && !found) 843 err = con2fb_acquire_newinfo(vc, info, unit, oldidx); 844 845 846 /* 847 * If old fb is not mapped to any of the consoles, 848 * fbcon should release it. 849 */ 850 if (!err && oldinfo && !search_fb_in_map(oldidx)) 851 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx, 852 found); 853 854 if (!err) { 855 int show_logo = (fg_console == 0 && !user && 856 logo_shown != FBCON_LOGO_DONTSHOW); 857 858 if (!found) 859 fbcon_add_cursor_timer(info); 860 con2fb_map_boot[unit] = newidx; 861 con2fb_init_display(vc, info, unit, show_logo); 862 } 863 864 if (!search_fb_in_map(info_idx)) 865 info_idx = newidx; 866 867 return err; 868} 869 870/* 871 * Low Level Operations 872 */ 873/* NOTE: fbcon cannot be __init: it may be called from do_take_over_console later */ 874static int var_to_display(struct display *disp, 875 struct fb_var_screeninfo *var, 876 struct fb_info *info) 877{ 878 disp->xres_virtual = var->xres_virtual; 879 disp->yres_virtual = var->yres_virtual; 880 disp->bits_per_pixel = var->bits_per_pixel; 881 disp->grayscale = var->grayscale; 882 disp->nonstd = var->nonstd; 883 disp->accel_flags = var->accel_flags; 884 disp->height = var->height; 885 disp->width = var->width; 886 disp->red = var->red; 887 disp->green = var->green; 888 disp->blue = var->blue; 889 disp->transp = var->transp; 890 disp->rotate = var->rotate; 891 disp->mode = fb_match_mode(var, &info->modelist); 892 if (disp->mode == NULL) 893 /* This should not happen */ 894 return -EINVAL; 895 return 0; 896} 897 898static void display_to_var(struct fb_var_screeninfo *var, 899 struct display *disp) 900{ 901 fb_videomode_to_var(var, disp->mode); 902 var->xres_virtual = disp->xres_virtual; 903 var->yres_virtual = disp->yres_virtual; 904 var->bits_per_pixel = disp->bits_per_pixel; 905 var->grayscale = disp->grayscale; 906 var->nonstd = disp->nonstd; 907 var->accel_flags = disp->accel_flags; 908 var->height = disp->height; 909 var->width = disp->width; 910 var->red = disp->red; 911 var->green = disp->green; 912 var->blue = disp->blue; 913 var->transp = disp->transp; 914 var->rotate = disp->rotate; 915} 916 917static const char *fbcon_startup(void) 918{ 919 const char *display_desc = "frame buffer device"; 920 struct display *p = &fb_display[fg_console]; 921 struct vc_data *vc = vc_cons[fg_console].d; 922 const struct font_desc *font = NULL; 923 struct module *owner; 924 struct fb_info *info = NULL; 925 struct fbcon_ops *ops; 926 int rows, cols; 927 928 /* 929 * If num_registered_fb is zero, this is a call for the dummy part. 930 * The frame buffer devices weren't initialized yet. 931 */ 932 if (!num_registered_fb || info_idx == -1) 933 return display_desc; 934 /* 935 * Instead of blindly using registered_fb[0], we use info_idx, set by 936 * fb_console_init(); 937 */ 938 info = registered_fb[info_idx]; 939 if (!info) 940 return NULL; 941 942 owner = info->fbops->owner; 943 if (!try_module_get(owner)) 944 return NULL; 945 if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) { 946 module_put(owner); 947 return NULL; 948 } 949 950 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL); 951 if (!ops) { 952 module_put(owner); 953 return NULL; 954 } 955 956 ops->currcon = -1; 957 ops->graphics = 1; 958 ops->cur_rotate = -1; 959 info->fbcon_par = ops; 960 p->con_rotate = initial_rotation; 961 set_blitting_type(vc, info); 962 963 if (info->fix.type != FB_TYPE_TEXT) { 964 if (fbcon_softback_size) { 965 if (!softback_buf) { 966 softback_buf = 967 (unsigned long) 968 kmalloc(fbcon_softback_size, 969 GFP_KERNEL); 970 if (!softback_buf) { 971 fbcon_softback_size = 0; 972 softback_top = 0; 973 } 974 } 975 } else { 976 if (softback_buf) { 977 kfree((void *) softback_buf); 978 softback_buf = 0; 979 softback_top = 0; 980 } 981 } 982 if (softback_buf) 983 softback_in = softback_top = softback_curr = 984 softback_buf; 985 softback_lines = 0; 986 } 987 988 /* Setup default font */ 989 if (!p->fontdata && !vc->vc_font.data) { 990 if (!fontname[0] || !(font = find_font(fontname))) 991 font = get_default_font(info->var.xres, 992 info->var.yres, 993 info->pixmap.blit_x, 994 info->pixmap.blit_y); 995 vc->vc_font.width = font->width; 996 vc->vc_font.height = font->height; 997 vc->vc_font.data = (void *)(p->fontdata = font->data); 998 vc->vc_font.charcount = 256; /* FIXME Need to support more fonts */ 999 } else { 1000 p->fontdata = vc->vc_font.data; 1001 } 1002 1003 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 1004 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 1005 cols /= vc->vc_font.width; 1006 rows /= vc->vc_font.height; 1007 vc_resize(vc, cols, rows); 1008 1009 DPRINTK("mode: %s\n", info->fix.id); 1010 DPRINTK("visual: %d\n", info->fix.visual); 1011 DPRINTK("res: %dx%d-%d\n", info->var.xres, 1012 info->var.yres, 1013 info->var.bits_per_pixel); 1014 1015 fbcon_add_cursor_timer(info); 1016 fbcon_has_exited = 0; 1017 return display_desc; 1018} 1019 1020static void fbcon_init(struct vc_data *vc, int init) 1021{ 1022 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1023 struct fbcon_ops *ops; 1024 struct vc_data **default_mode = vc->vc_display_fg; 1025 struct vc_data *svc = *default_mode; 1026 struct display *t, *p = &fb_display[vc->vc_num]; 1027 int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256; 1028 int cap, ret; 1029 1030 if (info_idx == -1 || info == NULL) 1031 return; 1032 1033 cap = info->flags; 1034 1035 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW || 1036 (info->fix.type == FB_TYPE_TEXT)) 1037 logo = 0; 1038 1039 if (var_to_display(p, &info->var, info)) 1040 return; 1041 1042 if (!info->fbcon_par) 1043 con2fb_acquire_newinfo(vc, info, vc->vc_num, -1); 1044 1045 /* If we are not the first console on this 1046 fb, copy the font from that console */ 1047 t = &fb_display[fg_console]; 1048 if (!p->fontdata) { 1049 if (t->fontdata) { 1050 struct vc_data *fvc = vc_cons[fg_console].d; 1051 1052 vc->vc_font.data = (void *)(p->fontdata = 1053 fvc->vc_font.data); 1054 vc->vc_font.width = fvc->vc_font.width; 1055 vc->vc_font.height = fvc->vc_font.height; 1056 p->userfont = t->userfont; 1057 1058 if (p->userfont) 1059 REFCOUNT(p->fontdata)++; 1060 } else { 1061 const struct font_desc *font = NULL; 1062 1063 if (!fontname[0] || !(font = find_font(fontname))) 1064 font = get_default_font(info->var.xres, 1065 info->var.yres, 1066 info->pixmap.blit_x, 1067 info->pixmap.blit_y); 1068 vc->vc_font.width = font->width; 1069 vc->vc_font.height = font->height; 1070 vc->vc_font.data = (void *)(p->fontdata = font->data); 1071 vc->vc_font.charcount = 256; /* FIXME Need to 1072 support more fonts */ 1073 } 1074 } 1075 1076 if (p->userfont) 1077 charcnt = FNTCHARCNT(p->fontdata); 1078 1079 vc->vc_panic_force_write = !!(info->flags & FBINFO_CAN_FORCE_OUTPUT); 1080 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1); 1081 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 1082 if (charcnt == 256) { 1083 vc->vc_hi_font_mask = 0; 1084 } else { 1085 vc->vc_hi_font_mask = 0x100; 1086 if (vc->vc_can_do_color) 1087 vc->vc_complement_mask <<= 1; 1088 } 1089 1090 if (!*svc->vc_uni_pagedir_loc) 1091 con_set_default_unimap(svc); 1092 if (!*vc->vc_uni_pagedir_loc) 1093 con_copy_unimap(vc, svc); 1094 1095 ops = info->fbcon_par; 1096 p->con_rotate = initial_rotation; 1097 set_blitting_type(vc, info); 1098 1099 cols = vc->vc_cols; 1100 rows = vc->vc_rows; 1101 new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 1102 new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 1103 new_cols /= vc->vc_font.width; 1104 new_rows /= vc->vc_font.height; 1105 1106 /* 1107 * We must always set the mode. The mode of the previous console 1108 * driver could be in the same resolution but we are using different 1109 * hardware so we have to initialize the hardware. 1110 * 1111 * We need to do it in fbcon_init() to prevent screen corruption. 1112 */ 1113 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) { 1114 if (info->fbops->fb_set_par && 1115 !(ops->flags & FBCON_FLAGS_INIT)) { 1116 ret = info->fbops->fb_set_par(info); 1117 1118 if (ret) 1119 printk(KERN_ERR "fbcon_init: detected " 1120 "unhandled fb_set_par error, " 1121 "error code %d\n", ret); 1122 } 1123 1124 ops->flags |= FBCON_FLAGS_INIT; 1125 } 1126 1127 ops->graphics = 0; 1128 1129 if ((cap & FBINFO_HWACCEL_COPYAREA) && 1130 !(cap & FBINFO_HWACCEL_DISABLED)) 1131 p->scrollmode = SCROLL_MOVE; 1132 else /* default to something safe */ 1133 p->scrollmode = SCROLL_REDRAW; 1134 1135 /* 1136 * ++guenther: console.c:vc_allocate() relies on initializing 1137 * vc_{cols,rows}, but we must not set those if we are only 1138 * resizing the console. 1139 */ 1140 if (init) { 1141 vc->vc_cols = new_cols; 1142 vc->vc_rows = new_rows; 1143 } else 1144 vc_resize(vc, new_cols, new_rows); 1145 1146 if (logo) 1147 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows); 1148 1149 if (vc == svc && softback_buf) 1150 fbcon_update_softback(vc); 1151 1152 if (ops->rotate_font && ops->rotate_font(info, vc)) { 1153 ops->rotate = FB_ROTATE_UR; 1154 set_blitting_type(vc, info); 1155 } 1156 1157 ops->p = &fb_display[fg_console]; 1158} 1159 1160static void fbcon_free_font(struct display *p, bool freefont) 1161{ 1162 if (freefont && p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0)) 1163 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int)); 1164 p->fontdata = NULL; 1165 p->userfont = 0; 1166} 1167 1168static void fbcon_deinit(struct vc_data *vc) 1169{ 1170 struct display *p = &fb_display[vc->vc_num]; 1171 struct fb_info *info; 1172 struct fbcon_ops *ops; 1173 int idx; 1174 bool free_font = true; 1175 1176 idx = con2fb_map[vc->vc_num]; 1177 1178 if (idx == -1) 1179 goto finished; 1180 1181 info = registered_fb[idx]; 1182 1183 if (!info) 1184 goto finished; 1185 1186 if (info->flags & FBINFO_MISC_FIRMWARE) 1187 free_font = false; 1188 ops = info->fbcon_par; 1189 1190 if (!ops) 1191 goto finished; 1192 1193 if (CON_IS_VISIBLE(vc)) 1194 fbcon_del_cursor_timer(info); 1195 1196 ops->flags &= ~FBCON_FLAGS_INIT; 1197finished: 1198 1199 fbcon_free_font(p, free_font); 1200 if (free_font) 1201 vc->vc_font.data = NULL; 1202 1203 if (!con_is_bound(&fb_con)) 1204 fbcon_exit(); 1205 1206 return; 1207} 1208 1209/* ====================================================================== */ 1210 1211/* fbcon_XXX routines - interface used by the world 1212 * 1213 * This system is now divided into two levels because of complications 1214 * caused by hardware scrolling. Top level functions: 1215 * 1216 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins() 1217 * 1218 * handles y values in range [0, scr_height-1] that correspond to real 1219 * screen positions. y_wrap shift means that first line of bitmap may be 1220 * anywhere on this display. These functions convert lineoffsets to 1221 * bitmap offsets and deal with the wrap-around case by splitting blits. 1222 * 1223 * fbcon_bmove_physical_8() -- These functions fast implementations 1224 * fbcon_clear_physical_8() -- of original fbcon_XXX fns. 1225 * fbcon_putc_physical_8() -- (font width != 8) may be added later 1226 * 1227 * WARNING: 1228 * 1229 * At the moment fbcon_putc() cannot blit across vertical wrap boundary 1230 * Implies should only really hardware scroll in rows. Only reason for 1231 * restriction is simplicity & efficiency at the moment. 1232 */ 1233 1234static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height, 1235 int width) 1236{ 1237 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1238 struct fbcon_ops *ops = info->fbcon_par; 1239 1240 struct display *p = &fb_display[vc->vc_num]; 1241 u_int y_break; 1242 1243 if (fbcon_is_inactive(vc, info)) 1244 return; 1245 1246 if (!height || !width) 1247 return; 1248 1249 if (sy < vc->vc_top && vc->vc_top == logo_lines) { 1250 vc->vc_top = 0; 1251 /* 1252 * If the font dimensions are not an integral of the display 1253 * dimensions then the ops->clear below won't end up clearing 1254 * the margins. Call clear_margins here in case the logo 1255 * bitmap stretched into the margin area. 1256 */ 1257 fbcon_clear_margins(vc, 0); 1258 } 1259 1260 /* Split blits that cross physical y_wrap boundary */ 1261 1262 y_break = p->vrows - p->yscroll; 1263 if (sy < y_break && sy + height - 1 >= y_break) { 1264 u_int b = y_break - sy; 1265 ops->clear(vc, info, real_y(p, sy), sx, b, width); 1266 ops->clear(vc, info, real_y(p, sy + b), sx, height - b, 1267 width); 1268 } else 1269 ops->clear(vc, info, real_y(p, sy), sx, height, width); 1270} 1271 1272static void fbcon_putcs(struct vc_data *vc, const unsigned short *s, 1273 int count, int ypos, int xpos) 1274{ 1275 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1276 struct display *p = &fb_display[vc->vc_num]; 1277 struct fbcon_ops *ops = info->fbcon_par; 1278 1279 if (!fbcon_is_inactive(vc, info)) 1280 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos, 1281 get_color(vc, info, scr_readw(s), 1), 1282 get_color(vc, info, scr_readw(s), 0)); 1283} 1284 1285static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos) 1286{ 1287 unsigned short chr; 1288 1289 scr_writew(c, &chr); 1290 fbcon_putcs(vc, &chr, 1, ypos, xpos); 1291} 1292 1293static void fbcon_clear_margins(struct vc_data *vc, int bottom_only) 1294{ 1295 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1296 struct fbcon_ops *ops = info->fbcon_par; 1297 1298 if (!fbcon_is_inactive(vc, info)) 1299 ops->clear_margins(vc, info, bottom_only); 1300} 1301 1302static void fbcon_cursor(struct vc_data *vc, int mode) 1303{ 1304 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1305 struct fbcon_ops *ops = info->fbcon_par; 1306 int y; 1307 int c = scr_readw((u16 *) vc->vc_pos); 1308 1309 if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1) 1310 return; 1311 1312 if (vc->vc_cursor_type & 0x10) 1313 fbcon_del_cursor_timer(info); 1314 else 1315 fbcon_add_cursor_timer(info); 1316 1317 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1; 1318 if (mode & CM_SOFTBACK) { 1319 mode &= ~CM_SOFTBACK; 1320 y = softback_lines; 1321 } else { 1322 if (softback_lines) 1323 fbcon_set_origin(vc); 1324 y = 0; 1325 } 1326 1327 ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1), 1328 get_color(vc, info, c, 0)); 1329} 1330 1331static int scrollback_phys_max = 0; 1332static int scrollback_max = 0; 1333static int scrollback_current = 0; 1334 1335static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var, 1336 int unit) 1337{ 1338 struct display *p, *t; 1339 struct vc_data **default_mode, *vc; 1340 struct vc_data *svc; 1341 struct fbcon_ops *ops = info->fbcon_par; 1342 int rows, cols, charcnt = 256; 1343 1344 p = &fb_display[unit]; 1345 1346 if (var_to_display(p, var, info)) 1347 return; 1348 1349 vc = vc_cons[unit].d; 1350 1351 if (!vc) 1352 return; 1353 1354 default_mode = vc->vc_display_fg; 1355 svc = *default_mode; 1356 t = &fb_display[svc->vc_num]; 1357 1358 if (!vc->vc_font.data) { 1359 vc->vc_font.data = (void *)(p->fontdata = t->fontdata); 1360 vc->vc_font.width = (*default_mode)->vc_font.width; 1361 vc->vc_font.height = (*default_mode)->vc_font.height; 1362 p->userfont = t->userfont; 1363 if (p->userfont) 1364 REFCOUNT(p->fontdata)++; 1365 } 1366 if (p->userfont) 1367 charcnt = FNTCHARCNT(p->fontdata); 1368 1369 var->activate = FB_ACTIVATE_NOW; 1370 info->var.activate = var->activate; 1371 var->yoffset = info->var.yoffset; 1372 var->xoffset = info->var.xoffset; 1373 fb_set_var(info, var); 1374 ops->var = info->var; 1375 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1); 1376 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 1377 if (charcnt == 256) { 1378 vc->vc_hi_font_mask = 0; 1379 } else { 1380 vc->vc_hi_font_mask = 0x100; 1381 if (vc->vc_can_do_color) 1382 vc->vc_complement_mask <<= 1; 1383 } 1384 1385 if (!*svc->vc_uni_pagedir_loc) 1386 con_set_default_unimap(svc); 1387 if (!*vc->vc_uni_pagedir_loc) 1388 con_copy_unimap(vc, svc); 1389 1390 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 1391 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 1392 cols /= vc->vc_font.width; 1393 rows /= vc->vc_font.height; 1394 vc_resize(vc, cols, rows); 1395 1396 if (CON_IS_VISIBLE(vc)) { 1397 update_screen(vc); 1398 if (softback_buf) 1399 fbcon_update_softback(vc); 1400 } 1401} 1402 1403static __inline__ void ywrap_up(struct vc_data *vc, int count) 1404{ 1405 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1406 struct fbcon_ops *ops = info->fbcon_par; 1407 struct display *p = &fb_display[vc->vc_num]; 1408 1409 p->yscroll += count; 1410 if (p->yscroll >= p->vrows) /* Deal with wrap */ 1411 p->yscroll -= p->vrows; 1412 ops->var.xoffset = 0; 1413 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1414 ops->var.vmode |= FB_VMODE_YWRAP; 1415 ops->update_start(info); 1416 scrollback_max += count; 1417 if (scrollback_max > scrollback_phys_max) 1418 scrollback_max = scrollback_phys_max; 1419 scrollback_current = 0; 1420} 1421 1422static __inline__ void ywrap_down(struct vc_data *vc, int count) 1423{ 1424 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1425 struct fbcon_ops *ops = info->fbcon_par; 1426 struct display *p = &fb_display[vc->vc_num]; 1427 1428 p->yscroll -= count; 1429 if (p->yscroll < 0) /* Deal with wrap */ 1430 p->yscroll += p->vrows; 1431 ops->var.xoffset = 0; 1432 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1433 ops->var.vmode |= FB_VMODE_YWRAP; 1434 ops->update_start(info); 1435 scrollback_max -= count; 1436 if (scrollback_max < 0) 1437 scrollback_max = 0; 1438 scrollback_current = 0; 1439} 1440 1441static __inline__ void ypan_up(struct vc_data *vc, int count) 1442{ 1443 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1444 struct display *p = &fb_display[vc->vc_num]; 1445 struct fbcon_ops *ops = info->fbcon_par; 1446 1447 p->yscroll += count; 1448 if (p->yscroll > p->vrows - vc->vc_rows) { 1449 ops->bmove(vc, info, p->vrows - vc->vc_rows, 1450 0, 0, 0, vc->vc_rows, vc->vc_cols); 1451 p->yscroll -= p->vrows - vc->vc_rows; 1452 } 1453 1454 ops->var.xoffset = 0; 1455 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1456 ops->var.vmode &= ~FB_VMODE_YWRAP; 1457 ops->update_start(info); 1458 fbcon_clear_margins(vc, 1); 1459 scrollback_max += count; 1460 if (scrollback_max > scrollback_phys_max) 1461 scrollback_max = scrollback_phys_max; 1462 scrollback_current = 0; 1463} 1464 1465static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count) 1466{ 1467 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1468 struct fbcon_ops *ops = info->fbcon_par; 1469 struct display *p = &fb_display[vc->vc_num]; 1470 1471 p->yscroll += count; 1472 1473 if (p->yscroll > p->vrows - vc->vc_rows) { 1474 p->yscroll -= p->vrows - vc->vc_rows; 1475 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t); 1476 } 1477 1478 ops->var.xoffset = 0; 1479 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1480 ops->var.vmode &= ~FB_VMODE_YWRAP; 1481 ops->update_start(info); 1482 fbcon_clear_margins(vc, 1); 1483 scrollback_max += count; 1484 if (scrollback_max > scrollback_phys_max) 1485 scrollback_max = scrollback_phys_max; 1486 scrollback_current = 0; 1487} 1488 1489static __inline__ void ypan_down(struct vc_data *vc, int count) 1490{ 1491 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1492 struct display *p = &fb_display[vc->vc_num]; 1493 struct fbcon_ops *ops = info->fbcon_par; 1494 1495 p->yscroll -= count; 1496 if (p->yscroll < 0) { 1497 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows, 1498 0, vc->vc_rows, vc->vc_cols); 1499 p->yscroll += p->vrows - vc->vc_rows; 1500 } 1501 1502 ops->var.xoffset = 0; 1503 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1504 ops->var.vmode &= ~FB_VMODE_YWRAP; 1505 ops->update_start(info); 1506 fbcon_clear_margins(vc, 1); 1507 scrollback_max -= count; 1508 if (scrollback_max < 0) 1509 scrollback_max = 0; 1510 scrollback_current = 0; 1511} 1512 1513static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count) 1514{ 1515 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1516 struct fbcon_ops *ops = info->fbcon_par; 1517 struct display *p = &fb_display[vc->vc_num]; 1518 1519 p->yscroll -= count; 1520 1521 if (p->yscroll < 0) { 1522 p->yscroll += p->vrows - vc->vc_rows; 1523 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count); 1524 } 1525 1526 ops->var.xoffset = 0; 1527 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1528 ops->var.vmode &= ~FB_VMODE_YWRAP; 1529 ops->update_start(info); 1530 fbcon_clear_margins(vc, 1); 1531 scrollback_max -= count; 1532 if (scrollback_max < 0) 1533 scrollback_max = 0; 1534 scrollback_current = 0; 1535} 1536 1537static void fbcon_redraw_softback(struct vc_data *vc, struct display *p, 1538 long delta) 1539{ 1540 int count = vc->vc_rows; 1541 unsigned short *d, *s; 1542 unsigned long n; 1543 int line = 0; 1544 1545 d = (u16 *) softback_curr; 1546 if (d == (u16 *) softback_in) 1547 d = (u16 *) vc->vc_origin; 1548 n = softback_curr + delta * vc->vc_size_row; 1549 softback_lines -= delta; 1550 if (delta < 0) { 1551 if (softback_curr < softback_top && n < softback_buf) { 1552 n += softback_end - softback_buf; 1553 if (n < softback_top) { 1554 softback_lines -= 1555 (softback_top - n) / vc->vc_size_row; 1556 n = softback_top; 1557 } 1558 } else if (softback_curr >= softback_top 1559 && n < softback_top) { 1560 softback_lines -= 1561 (softback_top - n) / vc->vc_size_row; 1562 n = softback_top; 1563 } 1564 } else { 1565 if (softback_curr > softback_in && n >= softback_end) { 1566 n += softback_buf - softback_end; 1567 if (n > softback_in) { 1568 n = softback_in; 1569 softback_lines = 0; 1570 } 1571 } else if (softback_curr <= softback_in && n > softback_in) { 1572 n = softback_in; 1573 softback_lines = 0; 1574 } 1575 } 1576 if (n == softback_curr) 1577 return; 1578 softback_curr = n; 1579 s = (u16 *) softback_curr; 1580 if (s == (u16 *) softback_in) 1581 s = (u16 *) vc->vc_origin; 1582 while (count--) { 1583 unsigned short *start; 1584 unsigned short *le; 1585 unsigned short c; 1586 int x = 0; 1587 unsigned short attr = 1; 1588 1589 start = s; 1590 le = advance_row(s, 1); 1591 do { 1592 c = scr_readw(s); 1593 if (attr != (c & 0xff00)) { 1594 attr = c & 0xff00; 1595 if (s > start) { 1596 fbcon_putcs(vc, start, s - start, 1597 line, x); 1598 x += s - start; 1599 start = s; 1600 } 1601 } 1602 if (c == scr_readw(d)) { 1603 if (s > start) { 1604 fbcon_putcs(vc, start, s - start, 1605 line, x); 1606 x += s - start + 1; 1607 start = s + 1; 1608 } else { 1609 x++; 1610 start++; 1611 } 1612 } 1613 s++; 1614 d++; 1615 } while (s < le); 1616 if (s > start) 1617 fbcon_putcs(vc, start, s - start, line, x); 1618 line++; 1619 if (d == (u16 *) softback_end) 1620 d = (u16 *) softback_buf; 1621 if (d == (u16 *) softback_in) 1622 d = (u16 *) vc->vc_origin; 1623 if (s == (u16 *) softback_end) 1624 s = (u16 *) softback_buf; 1625 if (s == (u16 *) softback_in) 1626 s = (u16 *) vc->vc_origin; 1627 } 1628} 1629 1630static void fbcon_redraw_move(struct vc_data *vc, struct display *p, 1631 int line, int count, int dy) 1632{ 1633 unsigned short *s = (unsigned short *) 1634 (vc->vc_origin + vc->vc_size_row * line); 1635 1636 while (count--) { 1637 unsigned short *start = s; 1638 unsigned short *le = advance_row(s, 1); 1639 unsigned short c; 1640 int x = 0; 1641 unsigned short attr = 1; 1642 1643 do { 1644 c = scr_readw(s); 1645 if (attr != (c & 0xff00)) { 1646 attr = c & 0xff00; 1647 if (s > start) { 1648 fbcon_putcs(vc, start, s - start, 1649 dy, x); 1650 x += s - start; 1651 start = s; 1652 } 1653 } 1654 console_conditional_schedule(); 1655 s++; 1656 } while (s < le); 1657 if (s > start) 1658 fbcon_putcs(vc, start, s - start, dy, x); 1659 console_conditional_schedule(); 1660 dy++; 1661 } 1662} 1663 1664static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info, 1665 struct display *p, int line, int count, int ycount) 1666{ 1667 int offset = ycount * vc->vc_cols; 1668 unsigned short *d = (unsigned short *) 1669 (vc->vc_origin + vc->vc_size_row * line); 1670 unsigned short *s = d + offset; 1671 struct fbcon_ops *ops = info->fbcon_par; 1672 1673 while (count--) { 1674 unsigned short *start = s; 1675 unsigned short *le = advance_row(s, 1); 1676 unsigned short c; 1677 int x = 0; 1678 1679 do { 1680 c = scr_readw(s); 1681 1682 if (c == scr_readw(d)) { 1683 if (s > start) { 1684 ops->bmove(vc, info, line + ycount, x, 1685 line, x, 1, s-start); 1686 x += s - start + 1; 1687 start = s + 1; 1688 } else { 1689 x++; 1690 start++; 1691 } 1692 } 1693 1694 scr_writew(c, d); 1695 console_conditional_schedule(); 1696 s++; 1697 d++; 1698 } while (s < le); 1699 if (s > start) 1700 ops->bmove(vc, info, line + ycount, x, line, x, 1, 1701 s-start); 1702 console_conditional_schedule(); 1703 if (ycount > 0) 1704 line++; 1705 else { 1706 line--; 1707 /* NOTE: We subtract two lines from these pointers */ 1708 s -= vc->vc_size_row; 1709 d -= vc->vc_size_row; 1710 } 1711 } 1712} 1713 1714static void fbcon_redraw(struct vc_data *vc, struct display *p, 1715 int line, int count, int offset) 1716{ 1717 unsigned short *d = (unsigned short *) 1718 (vc->vc_origin + vc->vc_size_row * line); 1719 unsigned short *s = d + offset; 1720 1721 while (count--) { 1722 unsigned short *start = s; 1723 unsigned short *le = advance_row(s, 1); 1724 unsigned short c; 1725 int x = 0; 1726 unsigned short attr = 1; 1727 1728 do { 1729 c = scr_readw(s); 1730 if (attr != (c & 0xff00)) { 1731 attr = c & 0xff00; 1732 if (s > start) { 1733 fbcon_putcs(vc, start, s - start, 1734 line, x); 1735 x += s - start; 1736 start = s; 1737 } 1738 } 1739 if (c == scr_readw(d)) { 1740 if (s > start) { 1741 fbcon_putcs(vc, start, s - start, 1742 line, x); 1743 x += s - start + 1; 1744 start = s + 1; 1745 } else { 1746 x++; 1747 start++; 1748 } 1749 } 1750 scr_writew(c, d); 1751 console_conditional_schedule(); 1752 s++; 1753 d++; 1754 } while (s < le); 1755 if (s > start) 1756 fbcon_putcs(vc, start, s - start, line, x); 1757 console_conditional_schedule(); 1758 if (offset > 0) 1759 line++; 1760 else { 1761 line--; 1762 /* NOTE: We subtract two lines from these pointers */ 1763 s -= vc->vc_size_row; 1764 d -= vc->vc_size_row; 1765 } 1766 } 1767} 1768 1769static inline void fbcon_softback_note(struct vc_data *vc, int t, 1770 int count) 1771{ 1772 unsigned short *p; 1773 1774 if (vc->vc_num != fg_console) 1775 return; 1776 p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row); 1777 1778 while (count) { 1779 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row); 1780 count--; 1781 p = advance_row(p, 1); 1782 softback_in += vc->vc_size_row; 1783 if (softback_in == softback_end) 1784 softback_in = softback_buf; 1785 if (softback_in == softback_top) { 1786 softback_top += vc->vc_size_row; 1787 if (softback_top == softback_end) 1788 softback_top = softback_buf; 1789 } 1790 } 1791 softback_curr = softback_in; 1792} 1793 1794static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir, 1795 int count) 1796{ 1797 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1798 struct display *p = &fb_display[vc->vc_num]; 1799 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK; 1800 1801 if (fbcon_is_inactive(vc, info)) 1802 return -EINVAL; 1803 1804 fbcon_cursor(vc, CM_ERASE); 1805 1806 /* 1807 * ++Geert: Only use ywrap/ypan if the console is in text mode 1808 * ++Andrew: Only use ypan on hardware text mode when scrolling the 1809 * whole screen (prevents flicker). 1810 */ 1811 1812 switch (dir) { 1813 case SM_UP: 1814 if (count > vc->vc_rows) /* Maximum realistic size */ 1815 count = vc->vc_rows; 1816 if (softback_top) 1817 fbcon_softback_note(vc, t, count); 1818 if (logo_shown >= 0) 1819 goto redraw_up; 1820 switch (p->scrollmode) { 1821 case SCROLL_MOVE: 1822 fbcon_redraw_blit(vc, info, p, t, b - t - count, 1823 count); 1824 fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1825 scr_memsetw((unsigned short *) (vc->vc_origin + 1826 vc->vc_size_row * 1827 (b - count)), 1828 vc->vc_video_erase_char, 1829 vc->vc_size_row * count); 1830 return 1; 1831 break; 1832 1833 case SCROLL_WRAP_MOVE: 1834 if (b - t - count > 3 * vc->vc_rows >> 2) { 1835 if (t > 0) 1836 fbcon_bmove(vc, 0, 0, count, 0, t, 1837 vc->vc_cols); 1838 ywrap_up(vc, count); 1839 if (vc->vc_rows - b > 0) 1840 fbcon_bmove(vc, b - count, 0, b, 0, 1841 vc->vc_rows - b, 1842 vc->vc_cols); 1843 } else if (info->flags & FBINFO_READS_FAST) 1844 fbcon_bmove(vc, t + count, 0, t, 0, 1845 b - t - count, vc->vc_cols); 1846 else 1847 goto redraw_up; 1848 fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1849 break; 1850 1851 case SCROLL_PAN_REDRAW: 1852 if ((p->yscroll + count <= 1853 2 * (p->vrows - vc->vc_rows)) 1854 && ((!scroll_partial && (b - t == vc->vc_rows)) 1855 || (scroll_partial 1856 && (b - t - count > 1857 3 * vc->vc_rows >> 2)))) { 1858 if (t > 0) 1859 fbcon_redraw_move(vc, p, 0, t, count); 1860 ypan_up_redraw(vc, t, count); 1861 if (vc->vc_rows - b > 0) 1862 fbcon_redraw_move(vc, p, b, 1863 vc->vc_rows - b, b); 1864 } else 1865 fbcon_redraw_move(vc, p, t + count, b - t - count, t); 1866 fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1867 break; 1868 1869 case SCROLL_PAN_MOVE: 1870 if ((p->yscroll + count <= 1871 2 * (p->vrows - vc->vc_rows)) 1872 && ((!scroll_partial && (b - t == vc->vc_rows)) 1873 || (scroll_partial 1874 && (b - t - count > 1875 3 * vc->vc_rows >> 2)))) { 1876 if (t > 0) 1877 fbcon_bmove(vc, 0, 0, count, 0, t, 1878 vc->vc_cols); 1879 ypan_up(vc, count); 1880 if (vc->vc_rows - b > 0) 1881 fbcon_bmove(vc, b - count, 0, b, 0, 1882 vc->vc_rows - b, 1883 vc->vc_cols); 1884 } else if (info->flags & FBINFO_READS_FAST) 1885 fbcon_bmove(vc, t + count, 0, t, 0, 1886 b - t - count, vc->vc_cols); 1887 else 1888 goto redraw_up; 1889 fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1890 break; 1891 1892 case SCROLL_REDRAW: 1893 redraw_up: 1894 fbcon_redraw(vc, p, t, b - t - count, 1895 count * vc->vc_cols); 1896 fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1897 scr_memsetw((unsigned short *) (vc->vc_origin + 1898 vc->vc_size_row * 1899 (b - count)), 1900 vc->vc_video_erase_char, 1901 vc->vc_size_row * count); 1902 return 1; 1903 } 1904 break; 1905 1906 case SM_DOWN: 1907 if (count > vc->vc_rows) /* Maximum realistic size */ 1908 count = vc->vc_rows; 1909 if (logo_shown >= 0) 1910 goto redraw_down; 1911 switch (p->scrollmode) { 1912 case SCROLL_MOVE: 1913 fbcon_redraw_blit(vc, info, p, b - 1, b - t - count, 1914 -count); 1915 fbcon_clear(vc, t, 0, count, vc->vc_cols); 1916 scr_memsetw((unsigned short *) (vc->vc_origin + 1917 vc->vc_size_row * 1918 t), 1919 vc->vc_video_erase_char, 1920 vc->vc_size_row * count); 1921 return 1; 1922 break; 1923 1924 case SCROLL_WRAP_MOVE: 1925 if (b - t - count > 3 * vc->vc_rows >> 2) { 1926 if (vc->vc_rows - b > 0) 1927 fbcon_bmove(vc, b, 0, b - count, 0, 1928 vc->vc_rows - b, 1929 vc->vc_cols); 1930 ywrap_down(vc, count); 1931 if (t > 0) 1932 fbcon_bmove(vc, count, 0, 0, 0, t, 1933 vc->vc_cols); 1934 } else if (info->flags & FBINFO_READS_FAST) 1935 fbcon_bmove(vc, t, 0, t + count, 0, 1936 b - t - count, vc->vc_cols); 1937 else 1938 goto redraw_down; 1939 fbcon_clear(vc, t, 0, count, vc->vc_cols); 1940 break; 1941 1942 case SCROLL_PAN_MOVE: 1943 if ((count - p->yscroll <= p->vrows - vc->vc_rows) 1944 && ((!scroll_partial && (b - t == vc->vc_rows)) 1945 || (scroll_partial 1946 && (b - t - count > 1947 3 * vc->vc_rows >> 2)))) { 1948 if (vc->vc_rows - b > 0) 1949 fbcon_bmove(vc, b, 0, b - count, 0, 1950 vc->vc_rows - b, 1951 vc->vc_cols); 1952 ypan_down(vc, count); 1953 if (t > 0) 1954 fbcon_bmove(vc, count, 0, 0, 0, t, 1955 vc->vc_cols); 1956 } else if (info->flags & FBINFO_READS_FAST) 1957 fbcon_bmove(vc, t, 0, t + count, 0, 1958 b - t - count, vc->vc_cols); 1959 else 1960 goto redraw_down; 1961 fbcon_clear(vc, t, 0, count, vc->vc_cols); 1962 break; 1963 1964 case SCROLL_PAN_REDRAW: 1965 if ((count - p->yscroll <= p->vrows - vc->vc_rows) 1966 && ((!scroll_partial && (b - t == vc->vc_rows)) 1967 || (scroll_partial 1968 && (b - t - count > 1969 3 * vc->vc_rows >> 2)))) { 1970 if (vc->vc_rows - b > 0) 1971 fbcon_redraw_move(vc, p, b, vc->vc_rows - b, 1972 b - count); 1973 ypan_down_redraw(vc, t, count); 1974 if (t > 0) 1975 fbcon_redraw_move(vc, p, count, t, 0); 1976 } else 1977 fbcon_redraw_move(vc, p, t, b - t - count, t + count); 1978 fbcon_clear(vc, t, 0, count, vc->vc_cols); 1979 break; 1980 1981 case SCROLL_REDRAW: 1982 redraw_down: 1983 fbcon_redraw(vc, p, b - 1, b - t - count, 1984 -count * vc->vc_cols); 1985 fbcon_clear(vc, t, 0, count, vc->vc_cols); 1986 scr_memsetw((unsigned short *) (vc->vc_origin + 1987 vc->vc_size_row * 1988 t), 1989 vc->vc_video_erase_char, 1990 vc->vc_size_row * count); 1991 return 1; 1992 } 1993 } 1994 return 0; 1995} 1996 1997 1998static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx, 1999 int height, int width) 2000{ 2001 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 2002 struct display *p = &fb_display[vc->vc_num]; 2003 2004 if (fbcon_is_inactive(vc, info)) 2005 return; 2006 2007 if (!width || !height) 2008 return; 2009 2010 /* Split blits that cross physical y_wrap case. 2011 * Pathological case involves 4 blits, better to use recursive 2012 * code rather than unrolled case 2013 * 2014 * Recursive invocations don't need to erase the cursor over and 2015 * over again, so we use fbcon_bmove_rec() 2016 */ 2017 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width, 2018 p->vrows - p->yscroll); 2019} 2020 2021static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx, 2022 int dy, int dx, int height, int width, u_int y_break) 2023{ 2024 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 2025 struct fbcon_ops *ops = info->fbcon_par; 2026 u_int b; 2027 2028 if (sy < y_break && sy + height > y_break) { 2029 b = y_break - sy; 2030 if (dy < sy) { /* Avoid trashing self */ 2031 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 2032 y_break); 2033 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 2034 height - b, width, y_break); 2035 } else { 2036 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 2037 height - b, width, y_break); 2038 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 2039 y_break); 2040 } 2041 return; 2042 } 2043 2044 if (dy < y_break && dy + height > y_break) { 2045 b = y_break - dy; 2046 if (dy < sy) { /* Avoid trashing self */ 2047 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 2048 y_break); 2049 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 2050 height - b, width, y_break); 2051 } else { 2052 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 2053 height - b, width, y_break); 2054 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 2055 y_break); 2056 } 2057 return; 2058 } 2059 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx, 2060 height, width); 2061} 2062 2063static void updatescrollmode(struct display *p, 2064 struct fb_info *info, 2065 struct vc_data *vc) 2066{ 2067 struct fbcon_ops *ops = info->fbcon_par; 2068 int fh = vc->vc_font.height; 2069 int cap = info->flags; 2070 u16 t = 0; 2071 int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep, 2072 info->fix.xpanstep); 2073 int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t); 2074 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 2075 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual, 2076 info->var.xres_virtual); 2077 int good_pan = (cap & FBINFO_HWACCEL_YPAN) && 2078 divides(ypan, vc->vc_font.height) && vyres > yres; 2079 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) && 2080 divides(ywrap, vc->vc_font.height) && 2081 divides(vc->vc_font.height, vyres) && 2082 divides(vc->vc_font.height, yres); 2083 int reading_fast = cap & FBINFO_READS_FAST; 2084 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) && 2085 !(cap & FBINFO_HWACCEL_DISABLED); 2086 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) && 2087 !(cap & FBINFO_HWACCEL_DISABLED); 2088 2089 p->vrows = vyres/fh; 2090 if (yres > (fh * (vc->vc_rows + 1))) 2091 p->vrows -= (yres - (fh * vc->vc_rows)) / fh; 2092 if ((yres % fh) && (vyres % fh < yres % fh)) 2093 p->vrows--; 2094 2095 if (good_wrap || good_pan) { 2096 if (reading_fast || fast_copyarea) 2097 p->scrollmode = good_wrap ? 2098 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE; 2099 else 2100 p->scrollmode = good_wrap ? SCROLL_REDRAW : 2101 SCROLL_PAN_REDRAW; 2102 } else { 2103 if (reading_fast || (fast_copyarea && !fast_imageblit)) 2104 p->scrollmode = SCROLL_MOVE; 2105 else 2106 p->scrollmode = SCROLL_REDRAW; 2107 } 2108} 2109 2110static int fbcon_resize(struct vc_data *vc, unsigned int width, 2111 unsigned int height, unsigned int user) 2112{ 2113 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 2114 struct fbcon_ops *ops = info->fbcon_par; 2115 struct display *p = &fb_display[vc->vc_num]; 2116 struct fb_var_screeninfo var = info->var; 2117 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh; 2118 2119 virt_w = FBCON_SWAP(ops->rotate, width, height); 2120 virt_h = FBCON_SWAP(ops->rotate, height, width); 2121 virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width, 2122 vc->vc_font.height); 2123 virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height, 2124 vc->vc_font.width); 2125 var.xres = virt_w * virt_fw; 2126 var.yres = virt_h * virt_fh; 2127 x_diff = info->var.xres - var.xres; 2128 y_diff = info->var.yres - var.yres; 2129 if (x_diff < 0 || x_diff > virt_fw || 2130 y_diff < 0 || y_diff > virt_fh) { 2131 const struct fb_videomode *mode; 2132 2133 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres); 2134 mode = fb_find_best_mode(&var, &info->modelist); 2135 if (mode == NULL) 2136 return -EINVAL; 2137 display_to_var(&var, p); 2138 fb_videomode_to_var(&var, mode); 2139 2140 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh) 2141 return -EINVAL; 2142 2143 DPRINTK("resize now %ix%i\n", var.xres, var.yres); 2144 if (CON_IS_VISIBLE(vc)) { 2145 var.activate = FB_ACTIVATE_NOW | 2146 FB_ACTIVATE_FORCE; 2147 fb_set_var(info, &var); 2148 } 2149 var_to_display(p, &info->var, info); 2150 ops->var = info->var; 2151 } 2152 updatescrollmode(p, info, vc); 2153 return 0; 2154} 2155 2156static int fbcon_switch(struct vc_data *vc) 2157{ 2158 struct fb_info *info, *old_info = NULL; 2159 struct fbcon_ops *ops; 2160 struct display *p = &fb_display[vc->vc_num]; 2161 struct fb_var_screeninfo var; 2162 int i, ret, prev_console, charcnt = 256; 2163 2164 info = registered_fb[con2fb_map[vc->vc_num]]; 2165 ops = info->fbcon_par; 2166 2167 if (softback_top) { 2168 if (softback_lines) 2169 fbcon_set_origin(vc); 2170 softback_top = softback_curr = softback_in = softback_buf; 2171 softback_lines = 0; 2172 fbcon_update_softback(vc); 2173 } 2174 2175 if (logo_shown >= 0) { 2176 struct vc_data *conp2 = vc_cons[logo_shown].d; 2177 2178 if (conp2->vc_top == logo_lines 2179 && conp2->vc_bottom == conp2->vc_rows) 2180 conp2->vc_top = 0; 2181 logo_shown = FBCON_LOGO_CANSHOW; 2182 } 2183 2184 prev_console = ops->currcon; 2185 if (prev_console != -1) 2186 old_info = registered_fb[con2fb_map[prev_console]]; 2187 /* 2188 * FIXME: If we have multiple fbdev's loaded, we need to 2189 * update all info->currcon. Perhaps, we can place this 2190 * in a centralized structure, but this might break some 2191 * drivers. 2192 * 2193 * info->currcon = vc->vc_num; 2194 */ 2195 for (i = 0; i < FB_MAX; i++) { 2196 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) { 2197 struct fbcon_ops *o = registered_fb[i]->fbcon_par; 2198 2199 o->currcon = vc->vc_num; 2200 } 2201 } 2202 memset(&var, 0, sizeof(struct fb_var_screeninfo)); 2203 display_to_var(&var, p); 2204 var.activate = FB_ACTIVATE_NOW; 2205 2206 /* 2207 * make sure we don't unnecessarily trip the memcmp() 2208 * in fb_set_var() 2209 */ 2210 info->var.activate = var.activate; 2211 var.vmode |= info->var.vmode & ~FB_VMODE_MASK; 2212 fb_set_var(info, &var); 2213 ops->var = info->var; 2214 2215 if (old_info != NULL && (old_info != info || 2216 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) { 2217 if (info->fbops->fb_set_par) { 2218 ret = info->fbops->fb_set_par(info); 2219 2220 if (ret) 2221 printk(KERN_ERR "fbcon_switch: detected " 2222 "unhandled fb_set_par error, " 2223 "error code %d\n", ret); 2224 } 2225 2226 if (old_info != info) 2227 fbcon_del_cursor_timer(old_info); 2228 } 2229 2230 if (fbcon_is_inactive(vc, info) || 2231 ops->blank_state != FB_BLANK_UNBLANK) 2232 fbcon_del_cursor_timer(info); 2233 else 2234 fbcon_add_cursor_timer(info); 2235 2236 set_blitting_type(vc, info); 2237 ops->cursor_reset = 1; 2238 2239 if (ops->rotate_font && ops->rotate_font(info, vc)) { 2240 ops->rotate = FB_ROTATE_UR; 2241 set_blitting_type(vc, info); 2242 } 2243 2244 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1); 2245 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 2246 2247 if (p->userfont) 2248 charcnt = FNTCHARCNT(vc->vc_font.data); 2249 2250 if (charcnt > 256) 2251 vc->vc_complement_mask <<= 1; 2252 2253 updatescrollmode(p, info, vc); 2254 2255 switch (p->scrollmode) { 2256 case SCROLL_WRAP_MOVE: 2257 scrollback_phys_max = p->vrows - vc->vc_rows; 2258 break; 2259 case SCROLL_PAN_MOVE: 2260 case SCROLL_PAN_REDRAW: 2261 scrollback_phys_max = p->vrows - 2 * vc->vc_rows; 2262 if (scrollback_phys_max < 0) 2263 scrollback_phys_max = 0; 2264 break; 2265 default: 2266 scrollback_phys_max = 0; 2267 break; 2268 } 2269 2270 scrollback_max = 0; 2271 scrollback_current = 0; 2272 2273 if (!fbcon_is_inactive(vc, info)) { 2274 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0; 2275 ops->update_start(info); 2276 } 2277 2278 fbcon_set_palette(vc, color_table); 2279 fbcon_clear_margins(vc, 0); 2280 2281 if (logo_shown == FBCON_LOGO_DRAW) { 2282 2283 logo_shown = fg_console; 2284 /* This is protected above by initmem_freed */ 2285 fb_show_logo(info, ops->rotate); 2286 update_region(vc, 2287 vc->vc_origin + vc->vc_size_row * vc->vc_top, 2288 vc->vc_size_row * (vc->vc_bottom - 2289 vc->vc_top) / 2); 2290 return 0; 2291 } 2292 return 1; 2293} 2294 2295static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info, 2296 int blank) 2297{ 2298 struct fb_event event; 2299 2300 if (blank) { 2301 unsigned short charmask = vc->vc_hi_font_mask ? 2302 0x1ff : 0xff; 2303 unsigned short oldc; 2304 2305 oldc = vc->vc_video_erase_char; 2306 vc->vc_video_erase_char &= charmask; 2307 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols); 2308 vc->vc_video_erase_char = oldc; 2309 } 2310 2311 2312 if (!lock_fb_info(info)) 2313 return; 2314 event.info = info; 2315 event.data = ␣ 2316 fb_notifier_call_chain(FB_EVENT_CONBLANK, &event); 2317 unlock_fb_info(info); 2318} 2319 2320static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch) 2321{ 2322 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 2323 struct fbcon_ops *ops = info->fbcon_par; 2324 2325 if (mode_switch) { 2326 struct fb_var_screeninfo var = info->var; 2327 2328 ops->graphics = 1; 2329 2330 if (!blank) { 2331 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE; 2332 fb_set_var(info, &var); 2333 ops->graphics = 0; 2334 ops->var = info->var; 2335 } 2336 } 2337 2338 if (!fbcon_is_inactive(vc, info)) { 2339 if (ops->blank_state != blank) { 2340 ops->blank_state = blank; 2341 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW); 2342 ops->cursor_flash = (!blank); 2343 2344 if (!(info->flags & FBINFO_MISC_USEREVENT)) 2345 if (fb_blank(info, blank)) 2346 fbcon_generic_blank(vc, info, blank); 2347 } 2348 2349 if (!blank) 2350 update_screen(vc); 2351 } 2352 2353 if (mode_switch || fbcon_is_inactive(vc, info) || 2354 ops->blank_state != FB_BLANK_UNBLANK) 2355 fbcon_del_cursor_timer(info); 2356 else 2357 fbcon_add_cursor_timer(info); 2358 2359 return 0; 2360} 2361 2362static int fbcon_debug_enter(struct vc_data *vc) 2363{ 2364 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 2365 struct fbcon_ops *ops = info->fbcon_par; 2366 2367 ops->save_graphics = ops->graphics; 2368 ops->graphics = 0; 2369 if (info->fbops->fb_debug_enter) 2370 info->fbops->fb_debug_enter(info); 2371 fbcon_set_palette(vc, color_table); 2372 return 0; 2373} 2374 2375static int fbcon_debug_leave(struct vc_data *vc) 2376{ 2377 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 2378 struct fbcon_ops *ops = info->fbcon_par; 2379 2380 ops->graphics = ops->save_graphics; 2381 if (info->fbops->fb_debug_leave) 2382 info->fbops->fb_debug_leave(info); 2383 return 0; 2384} 2385 2386static int fbcon_get_font(struct vc_data *vc, struct console_font *font) 2387{ 2388 u8 *fontdata = vc->vc_font.data; 2389 u8 *data = font->data; 2390 int i, j; 2391 2392 font->width = vc->vc_font.width; 2393 font->height = vc->vc_font.height; 2394 font->charcount = vc->vc_hi_font_mask ? 512 : 256; 2395 if (!font->data) 2396 return 0; 2397 2398 if (font->width <= 8) { 2399 j = vc->vc_font.height; 2400 for (i = 0; i < font->charcount; i++) { 2401 memcpy(data, fontdata, j); 2402 memset(data + j, 0, 32 - j); 2403 data += 32; 2404 fontdata += j; 2405 } 2406 } else if (font->width <= 16) { 2407 j = vc->vc_font.height * 2; 2408 for (i = 0; i < font->charcount; i++) { 2409 memcpy(data, fontdata, j); 2410 memset(data + j, 0, 64 - j); 2411 data += 64; 2412 fontdata += j; 2413 } 2414 } else if (font->width <= 24) { 2415 for (i = 0; i < font->charcount; i++) { 2416 for (j = 0; j < vc->vc_font.height; j++) { 2417 *data++ = fontdata[0]; 2418 *data++ = fontdata[1]; 2419 *data++ = fontdata[2]; 2420 fontdata += sizeof(u32); 2421 } 2422 memset(data, 0, 3 * (32 - j)); 2423 data += 3 * (32 - j); 2424 } 2425 } else { 2426 j = vc->vc_font.height * 4; 2427 for (i = 0; i < font->charcount; i++) { 2428 memcpy(data, fontdata, j); 2429 memset(data + j, 0, 128 - j); 2430 data += 128; 2431 fontdata += j; 2432 } 2433 } 2434 return 0; 2435} 2436 2437static int fbcon_do_set_font(struct vc_data *vc, int w, int h, 2438 const u8 * data, int userfont) 2439{ 2440 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 2441 struct fbcon_ops *ops = info->fbcon_par; 2442 struct display *p = &fb_display[vc->vc_num]; 2443 int resize; 2444 int cnt; 2445 char *old_data = NULL; 2446 2447 if (CON_IS_VISIBLE(vc) && softback_lines) 2448 fbcon_set_origin(vc); 2449 2450 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height); 2451 if (p->userfont) 2452 old_data = vc->vc_font.data; 2453 if (userfont) 2454 cnt = FNTCHARCNT(data); 2455 else 2456 cnt = 256; 2457 vc->vc_font.data = (void *)(p->fontdata = data); 2458 if ((p->userfont = userfont)) 2459 REFCOUNT(data)++; 2460 vc->vc_font.width = w; 2461 vc->vc_font.height = h; 2462 if (vc->vc_hi_font_mask && cnt == 256) { 2463 vc->vc_hi_font_mask = 0; 2464 if (vc->vc_can_do_color) { 2465 vc->vc_complement_mask >>= 1; 2466 vc->vc_s_complement_mask >>= 1; 2467 } 2468 2469 /* ++Edmund: reorder the attribute bits */ 2470 if (vc->vc_can_do_color) { 2471 unsigned short *cp = 2472 (unsigned short *) vc->vc_origin; 2473 int count = vc->vc_screenbuf_size / 2; 2474 unsigned short c; 2475 for (; count > 0; count--, cp++) { 2476 c = scr_readw(cp); 2477 scr_writew(((c & 0xfe00) >> 1) | 2478 (c & 0xff), cp); 2479 } 2480 c = vc->vc_video_erase_char; 2481 vc->vc_video_erase_char = 2482 ((c & 0xfe00) >> 1) | (c & 0xff); 2483 vc->vc_attr >>= 1; 2484 } 2485 } else if (!vc->vc_hi_font_mask && cnt == 512) { 2486 vc->vc_hi_font_mask = 0x100; 2487 if (vc->vc_can_do_color) { 2488 vc->vc_complement_mask <<= 1; 2489 vc->vc_s_complement_mask <<= 1; 2490 } 2491 2492 /* ++Edmund: reorder the attribute bits */ 2493 { 2494 unsigned short *cp = 2495 (unsigned short *) vc->vc_origin; 2496 int count = vc->vc_screenbuf_size / 2; 2497 unsigned short c; 2498 for (; count > 0; count--, cp++) { 2499 unsigned short newc; 2500 c = scr_readw(cp); 2501 if (vc->vc_can_do_color) 2502 newc = 2503 ((c & 0xff00) << 1) | (c & 2504 0xff); 2505 else 2506 newc = c & ~0x100; 2507 scr_writew(newc, cp); 2508 } 2509 c = vc->vc_video_erase_char; 2510 if (vc->vc_can_do_color) { 2511 vc->vc_video_erase_char = 2512 ((c & 0xff00) << 1) | (c & 0xff); 2513 vc->vc_attr <<= 1; 2514 } else 2515 vc->vc_video_erase_char = c & ~0x100; 2516 } 2517 2518 } 2519 2520 if (resize) { 2521 int cols, rows; 2522 2523 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 2524 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 2525 cols /= w; 2526 rows /= h; 2527 vc_resize(vc, cols, rows); 2528 if (CON_IS_VISIBLE(vc) && softback_buf) 2529 fbcon_update_softback(vc); 2530 } else if (CON_IS_VISIBLE(vc) 2531 && vc->vc_mode == KD_TEXT) { 2532 fbcon_clear_margins(vc, 0); 2533 update_screen(vc); 2534 } 2535 2536 if (old_data && (--REFCOUNT(old_data) == 0)) 2537 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int)); 2538 return 0; 2539} 2540 2541static int fbcon_copy_font(struct vc_data *vc, int con) 2542{ 2543 struct display *od = &fb_display[con]; 2544 struct console_font *f = &vc->vc_font; 2545 2546 if (od->fontdata == f->data) 2547 return 0; /* already the same font... */ 2548 return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont); 2549} 2550 2551/* 2552 * User asked to set font; we are guaranteed that 2553 * a) width and height are in range 1..32 2554 * b) charcount does not exceed 512 2555 * but lets not assume that, since someone might someday want to use larger 2556 * fonts. And charcount of 512 is small for unicode support. 2557 * 2558 * However, user space gives the font in 32 rows , regardless of 2559 * actual font height. So a new API is needed if support for larger fonts 2560 * is ever implemented. 2561 */ 2562 2563static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags) 2564{ 2565 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 2566 unsigned charcount = font->charcount; 2567 int w = font->width; 2568 int h = font->height; 2569 int size; 2570 int i, csum; 2571 u8 *new_data, *data = font->data; 2572 int pitch = (font->width+7) >> 3; 2573 2574 /* Is there a reason why fbconsole couldn't handle any charcount >256? 2575 * If not this check should be changed to charcount < 256 */ 2576 if (charcount != 256 && charcount != 512) 2577 return -EINVAL; 2578 2579 /* Make sure drawing engine can handle the font */ 2580 if (!(info->pixmap.blit_x & (1 << (font->width - 1))) || 2581 !(info->pixmap.blit_y & (1 << (font->height - 1)))) 2582 return -EINVAL; 2583 2584 /* Make sure driver can handle the font length */ 2585 if (fbcon_invalid_charcount(info, charcount)) 2586 return -EINVAL; 2587 2588 size = h * pitch * charcount; 2589 2590 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER); 2591 2592 if (!new_data) 2593 return -ENOMEM; 2594 2595 new_data += FONT_EXTRA_WORDS * sizeof(int); 2596 FNTSIZE(new_data) = size; 2597 FNTCHARCNT(new_data) = charcount; 2598 REFCOUNT(new_data) = 0; /* usage counter */ 2599 for (i=0; i< charcount; i++) { 2600 memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch); 2601 } 2602 2603 /* Since linux has a nice crc32 function use it for counting font 2604 * checksums. */ 2605 csum = crc32(0, new_data, size); 2606 2607 FNTSUM(new_data) = csum; 2608 /* Check if the same font is on some other console already */ 2609 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2610 struct vc_data *tmp = vc_cons[i].d; 2611 2612 if (fb_display[i].userfont && 2613 fb_display[i].fontdata && 2614 FNTSUM(fb_display[i].fontdata) == csum && 2615 FNTSIZE(fb_display[i].fontdata) == size && 2616 tmp->vc_font.width == w && 2617 !memcmp(fb_display[i].fontdata, new_data, size)) { 2618 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int)); 2619 new_data = (u8 *)fb_display[i].fontdata; 2620 break; 2621 } 2622 } 2623 return fbcon_do_set_font(vc, font->width, font->height, new_data, 1); 2624} 2625 2626static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name) 2627{ 2628 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 2629 const struct font_desc *f; 2630 2631 if (!name) 2632 f = get_default_font(info->var.xres, info->var.yres, 2633 info->pixmap.blit_x, info->pixmap.blit_y); 2634 else if (!(f = find_font(name))) 2635 return -ENOENT; 2636 2637 font->width = f->width; 2638 font->height = f->height; 2639 return fbcon_do_set_font(vc, f->width, f->height, f->data, 0); 2640} 2641 2642static u16 palette_red[16]; 2643static u16 palette_green[16]; 2644static u16 palette_blue[16]; 2645 2646static struct fb_cmap palette_cmap = { 2647 0, 16, palette_red, palette_green, palette_blue, NULL 2648}; 2649 2650static int fbcon_set_palette(struct vc_data *vc, unsigned char *table) 2651{ 2652 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 2653 int i, j, k, depth; 2654 u8 val; 2655 2656 if (fbcon_is_inactive(vc, info)) 2657 return -EINVAL; 2658 2659 if (!CON_IS_VISIBLE(vc)) 2660 return 0; 2661 2662 depth = fb_get_color_depth(&info->var, &info->fix); 2663 if (depth > 3) { 2664 for (i = j = 0; i < 16; i++) { 2665 k = table[i]; 2666 val = vc->vc_palette[j++]; 2667 palette_red[k] = (val << 8) | val; 2668 val = vc->vc_palette[j++]; 2669 palette_green[k] = (val << 8) | val; 2670 val = vc->vc_palette[j++]; 2671 palette_blue[k] = (val << 8) | val; 2672 } 2673 palette_cmap.len = 16; 2674 palette_cmap.start = 0; 2675 /* 2676 * If framebuffer is capable of less than 16 colors, 2677 * use default palette of fbcon. 2678 */ 2679 } else 2680 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap); 2681 2682 return fb_set_cmap(&palette_cmap, info); 2683} 2684 2685static u16 *fbcon_screen_pos(struct vc_data *vc, int offset) 2686{ 2687 unsigned long p; 2688 int line; 2689 2690 if (vc->vc_num != fg_console || !softback_lines) 2691 return (u16 *) (vc->vc_origin + offset); 2692 line = offset / vc->vc_size_row; 2693 if (line >= softback_lines) 2694 return (u16 *) (vc->vc_origin + offset - 2695 softback_lines * vc->vc_size_row); 2696 p = softback_curr + offset; 2697 if (p >= softback_end) 2698 p += softback_buf - softback_end; 2699 return (u16 *) p; 2700} 2701 2702static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos, 2703 int *px, int *py) 2704{ 2705 unsigned long ret; 2706 int x, y; 2707 2708 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) { 2709 unsigned long offset = (pos - vc->vc_origin) / 2; 2710 2711 x = offset % vc->vc_cols; 2712 y = offset / vc->vc_cols; 2713 if (vc->vc_num == fg_console) 2714 y += softback_lines; 2715 ret = pos + (vc->vc_cols - x) * 2; 2716 } else if (vc->vc_num == fg_console && softback_lines) { 2717 unsigned long offset = pos - softback_curr; 2718 2719 if (pos < softback_curr) 2720 offset += softback_end - softback_buf; 2721 offset /= 2; 2722 x = offset % vc->vc_cols; 2723 y = offset / vc->vc_cols; 2724 ret = pos + (vc->vc_cols - x) * 2; 2725 if (ret == softback_end) 2726 ret = softback_buf; 2727 if (ret == softback_in) 2728 ret = vc->vc_origin; 2729 } else { 2730 /* Should not happen */ 2731 x = y = 0; 2732 ret = vc->vc_origin; 2733 } 2734 if (px) 2735 *px = x; 2736 if (py) 2737 *py = y; 2738 return ret; 2739} 2740 2741/* As we might be inside of softback, we may work with non-contiguous buffer, 2742 that's why we have to use a separate routine. */ 2743static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt) 2744{ 2745 while (cnt--) { 2746 u16 a = scr_readw(p); 2747 if (!vc->vc_can_do_color) 2748 a ^= 0x0800; 2749 else if (vc->vc_hi_font_mask == 0x100) 2750 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | 2751 (((a) & 0x0e00) << 4); 2752 else 2753 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | 2754 (((a) & 0x0700) << 4); 2755 scr_writew(a, p++); 2756 if (p == (u16 *) softback_end) 2757 p = (u16 *) softback_buf; 2758 if (p == (u16 *) softback_in) 2759 p = (u16 *) vc->vc_origin; 2760 } 2761} 2762 2763static int fbcon_scrolldelta(struct vc_data *vc, int lines) 2764{ 2765 struct fb_info *info = registered_fb[con2fb_map[fg_console]]; 2766 struct fbcon_ops *ops = info->fbcon_par; 2767 struct display *disp = &fb_display[fg_console]; 2768 int offset, limit, scrollback_old; 2769 2770 if (softback_top) { 2771 if (vc->vc_num != fg_console) 2772 return 0; 2773 if (vc->vc_mode != KD_TEXT || !lines) 2774 return 0; 2775 if (logo_shown >= 0) { 2776 struct vc_data *conp2 = vc_cons[logo_shown].d; 2777 2778 if (conp2->vc_top == logo_lines 2779 && conp2->vc_bottom == conp2->vc_rows) 2780 conp2->vc_top = 0; 2781 if (logo_shown == vc->vc_num) { 2782 unsigned long p, q; 2783 int i; 2784 2785 p = softback_in; 2786 q = vc->vc_origin + 2787 logo_lines * vc->vc_size_row; 2788 for (i = 0; i < logo_lines; i++) { 2789 if (p == softback_top) 2790 break; 2791 if (p == softback_buf) 2792 p = softback_end; 2793 p -= vc->vc_size_row; 2794 q -= vc->vc_size_row; 2795 scr_memcpyw((u16 *) q, (u16 *) p, 2796 vc->vc_size_row); 2797 } 2798 softback_in = softback_curr = p; 2799 update_region(vc, vc->vc_origin, 2800 logo_lines * vc->vc_cols); 2801 } 2802 logo_shown = FBCON_LOGO_CANSHOW; 2803 } 2804 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK); 2805 fbcon_redraw_softback(vc, disp, lines); 2806 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK); 2807 return 0; 2808 } 2809 2810 if (!scrollback_phys_max) 2811 return -ENOSYS; 2812 2813 scrollback_old = scrollback_current; 2814 scrollback_current -= lines; 2815 if (scrollback_current < 0) 2816 scrollback_current = 0; 2817 else if (scrollback_current > scrollback_max) 2818 scrollback_current = scrollback_max; 2819 if (scrollback_current == scrollback_old) 2820 return 0; 2821 2822 if (fbcon_is_inactive(vc, info)) 2823 return 0; 2824 2825 fbcon_cursor(vc, CM_ERASE); 2826 2827 offset = disp->yscroll - scrollback_current; 2828 limit = disp->vrows; 2829 switch (disp->scrollmode) { 2830 case SCROLL_WRAP_MOVE: 2831 info->var.vmode |= FB_VMODE_YWRAP; 2832 break; 2833 case SCROLL_PAN_MOVE: 2834 case SCROLL_PAN_REDRAW: 2835 limit -= vc->vc_rows; 2836 info->var.vmode &= ~FB_VMODE_YWRAP; 2837 break; 2838 } 2839 if (offset < 0) 2840 offset += limit; 2841 else if (offset >= limit) 2842 offset -= limit; 2843 2844 ops->var.xoffset = 0; 2845 ops->var.yoffset = offset * vc->vc_font.height; 2846 ops->update_start(info); 2847 2848 if (!scrollback_current) 2849 fbcon_cursor(vc, CM_DRAW); 2850 return 0; 2851} 2852 2853static int fbcon_set_origin(struct vc_data *vc) 2854{ 2855 if (softback_lines) 2856 fbcon_scrolldelta(vc, softback_lines); 2857 return 0; 2858} 2859 2860static void fbcon_suspended(struct fb_info *info) 2861{ 2862 struct vc_data *vc = NULL; 2863 struct fbcon_ops *ops = info->fbcon_par; 2864 2865 if (!ops || ops->currcon < 0) 2866 return; 2867 vc = vc_cons[ops->currcon].d; 2868 2869 /* Clear cursor, restore saved data */ 2870 fbcon_cursor(vc, CM_ERASE); 2871} 2872 2873static void fbcon_resumed(struct fb_info *info) 2874{ 2875 struct vc_data *vc; 2876 struct fbcon_ops *ops = info->fbcon_par; 2877 2878 if (!ops || ops->currcon < 0) 2879 return; 2880 vc = vc_cons[ops->currcon].d; 2881 2882 update_screen(vc); 2883} 2884 2885static void fbcon_modechanged(struct fb_info *info) 2886{ 2887 struct fbcon_ops *ops = info->fbcon_par; 2888 struct vc_data *vc; 2889 struct display *p; 2890 int rows, cols; 2891 2892 if (!ops || ops->currcon < 0) 2893 return; 2894 vc = vc_cons[ops->currcon].d; 2895 if (vc->vc_mode != KD_TEXT || 2896 registered_fb[con2fb_map[ops->currcon]] != info) 2897 return; 2898 2899 p = &fb_display[vc->vc_num]; 2900 set_blitting_type(vc, info); 2901 2902 if (CON_IS_VISIBLE(vc)) { 2903 var_to_display(p, &info->var, info); 2904 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 2905 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 2906 cols /= vc->vc_font.width; 2907 rows /= vc->vc_font.height; 2908 vc_resize(vc, cols, rows); 2909 updatescrollmode(p, info, vc); 2910 scrollback_max = 0; 2911 scrollback_current = 0; 2912 2913 if (!fbcon_is_inactive(vc, info)) { 2914 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0; 2915 ops->update_start(info); 2916 } 2917 2918 fbcon_set_palette(vc, color_table); 2919 update_screen(vc); 2920 if (softback_buf) 2921 fbcon_update_softback(vc); 2922 } 2923} 2924 2925static void fbcon_set_all_vcs(struct fb_info *info) 2926{ 2927 struct fbcon_ops *ops = info->fbcon_par; 2928 struct vc_data *vc; 2929 struct display *p; 2930 int i, rows, cols, fg = -1; 2931 2932 if (!ops || ops->currcon < 0) 2933 return; 2934 2935 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2936 vc = vc_cons[i].d; 2937 if (!vc || vc->vc_mode != KD_TEXT || 2938 registered_fb[con2fb_map[i]] != info) 2939 continue; 2940 2941 if (CON_IS_VISIBLE(vc)) { 2942 fg = i; 2943 continue; 2944 } 2945 2946 p = &fb_display[vc->vc_num]; 2947 set_blitting_type(vc, info); 2948 var_to_display(p, &info->var, info); 2949 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 2950 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 2951 cols /= vc->vc_font.width; 2952 rows /= vc->vc_font.height; 2953 vc_resize(vc, cols, rows); 2954 } 2955 2956 if (fg != -1) 2957 fbcon_modechanged(info); 2958} 2959 2960static int fbcon_mode_deleted(struct fb_info *info, 2961 struct fb_videomode *mode) 2962{ 2963 struct fb_info *fb_info; 2964 struct display *p; 2965 int i, j, found = 0; 2966 2967 /* before deletion, ensure that mode is not in use */ 2968 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2969 j = con2fb_map[i]; 2970 if (j == -1) 2971 continue; 2972 fb_info = registered_fb[j]; 2973 if (fb_info != info) 2974 continue; 2975 p = &fb_display[i]; 2976 if (!p || !p->mode) 2977 continue; 2978 if (fb_mode_is_equal(p->mode, mode)) { 2979 found = 1; 2980 break; 2981 } 2982 } 2983 return found; 2984} 2985 2986#ifdef CONFIG_VT_HW_CONSOLE_BINDING 2987static int fbcon_unbind(void) 2988{ 2989 int ret; 2990 2991 ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc, 2992 fbcon_is_default); 2993 2994 if (!ret) 2995 fbcon_has_console_bind = 0; 2996 2997 return ret; 2998} 2999#else 3000static inline int fbcon_unbind(void) 3001{ 3002 return -EINVAL; 3003} 3004#endif /* CONFIG_VT_HW_CONSOLE_BINDING */ 3005 3006/* called with console_lock held */ 3007static int fbcon_fb_unbind(int idx) 3008{ 3009 int i, new_idx = -1, ret = 0; 3010 3011 if (!fbcon_has_console_bind) 3012 return 0; 3013 3014 for (i = first_fb_vc; i <= last_fb_vc; i++) { 3015 if (con2fb_map[i] != idx && 3016 con2fb_map[i] != -1) { 3017 new_idx = i; 3018 break; 3019 } 3020 } 3021 3022 if (new_idx != -1) { 3023 for (i = first_fb_vc; i <= last_fb_vc; i++) { 3024 if (con2fb_map[i] == idx) 3025 set_con2fb_map(i, new_idx, 0); 3026 } 3027 } else { 3028 struct fb_info *info = registered_fb[idx]; 3029 3030 /* This is sort of like set_con2fb_map, except it maps 3031 * the consoles to no device and then releases the 3032 * oldinfo to free memory and cancel the cursor blink 3033 * timer. I can imagine this just becoming part of 3034 * set_con2fb_map where new_idx is -1 3035 */ 3036 for (i = first_fb_vc; i <= last_fb_vc; i++) { 3037 if (con2fb_map[i] == idx) { 3038 con2fb_map[i] = -1; 3039 if (!search_fb_in_map(idx)) { 3040 ret = con2fb_release_oldinfo(vc_cons[i].d, 3041 info, NULL, i, 3042 idx, 0); 3043 if (ret) { 3044 con2fb_map[i] = idx; 3045 return ret; 3046 } 3047 } 3048 } 3049 } 3050 ret = fbcon_unbind(); 3051 } 3052 3053 return ret; 3054} 3055 3056/* called with console_lock held */ 3057static int fbcon_fb_unregistered(struct fb_info *info) 3058{ 3059 int i, idx; 3060 3061 idx = info->node; 3062 for (i = first_fb_vc; i <= last_fb_vc; i++) { 3063 if (con2fb_map[i] == idx) 3064 con2fb_map[i] = -1; 3065 } 3066 3067 if (idx == info_idx) { 3068 info_idx = -1; 3069 3070 for (i = 0; i < FB_MAX; i++) { 3071 if (registered_fb[i] != NULL) { 3072 info_idx = i; 3073 break; 3074 } 3075 } 3076 } 3077 3078 if (info_idx != -1) { 3079 for (i = first_fb_vc; i <= last_fb_vc; i++) { 3080 if (con2fb_map[i] == -1) 3081 con2fb_map[i] = info_idx; 3082 } 3083 } 3084 3085 if (primary_device == idx) 3086 primary_device = -1; 3087 3088 if (!num_registered_fb) 3089 do_unregister_con_driver(&fb_con); 3090 3091 return 0; 3092} 3093 3094/* called with console_lock held */ 3095static void fbcon_remap_all(int idx) 3096{ 3097 int i; 3098 for (i = first_fb_vc; i <= last_fb_vc; i++) 3099 set_con2fb_map(i, idx, 0); 3100 3101 if (con_is_bound(&fb_con)) { 3102 printk(KERN_INFO "fbcon: Remapping primary device, " 3103 "fb%i, to tty %i-%i\n", idx, 3104 first_fb_vc + 1, last_fb_vc + 1); 3105 info_idx = idx; 3106 } 3107} 3108 3109#ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY 3110static void fbcon_select_primary(struct fb_info *info) 3111{ 3112 if (!map_override && primary_device == -1 && 3113 fb_is_primary_device(info)) { 3114 int i; 3115 3116 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n", 3117 info->fix.id, info->node); 3118 primary_device = info->node; 3119 3120 for (i = first_fb_vc; i <= last_fb_vc; i++) 3121 con2fb_map_boot[i] = primary_device; 3122 3123 if (con_is_bound(&fb_con)) { 3124 printk(KERN_INFO "fbcon: Remapping primary device, " 3125 "fb%i, to tty %i-%i\n", info->node, 3126 first_fb_vc + 1, last_fb_vc + 1); 3127 info_idx = primary_device; 3128 } 3129 } 3130 3131} 3132#else 3133static inline void fbcon_select_primary(struct fb_info *info) 3134{ 3135 return; 3136} 3137#endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */ 3138 3139/* called with console_lock held */ 3140static int fbcon_fb_registered(struct fb_info *info) 3141{ 3142 int ret = 0, i, idx; 3143 3144 idx = info->node; 3145 fbcon_select_primary(info); 3146 3147 if (info_idx == -1) { 3148 for (i = first_fb_vc; i <= last_fb_vc; i++) { 3149 if (con2fb_map_boot[i] == idx) { 3150 info_idx = idx; 3151 break; 3152 } 3153 } 3154 3155 if (info_idx != -1) 3156 ret = do_fbcon_takeover(1); 3157 } else { 3158 for (i = first_fb_vc; i <= last_fb_vc; i++) { 3159 if (con2fb_map_boot[i] == idx) 3160 set_con2fb_map(i, idx, 0); 3161 } 3162 } 3163 3164 return ret; 3165} 3166 3167static void fbcon_fb_blanked(struct fb_info *info, int blank) 3168{ 3169 struct fbcon_ops *ops = info->fbcon_par; 3170 struct vc_data *vc; 3171 3172 if (!ops || ops->currcon < 0) 3173 return; 3174 3175 vc = vc_cons[ops->currcon].d; 3176 if (vc->vc_mode != KD_TEXT || 3177 registered_fb[con2fb_map[ops->currcon]] != info) 3178 return; 3179 3180 if (CON_IS_VISIBLE(vc)) { 3181 if (blank) 3182 do_blank_screen(0); 3183 else 3184 do_unblank_screen(0); 3185 } 3186 ops->blank_state = blank; 3187} 3188 3189static void fbcon_new_modelist(struct fb_info *info) 3190{ 3191 int i; 3192 struct vc_data *vc; 3193 struct fb_var_screeninfo var; 3194 const struct fb_videomode *mode; 3195 3196 for (i = first_fb_vc; i <= last_fb_vc; i++) { 3197 if (registered_fb[con2fb_map[i]] != info) 3198 continue; 3199 if (!fb_display[i].mode) 3200 continue; 3201 vc = vc_cons[i].d; 3202 display_to_var(&var, &fb_display[i]); 3203 mode = fb_find_nearest_mode(fb_display[i].mode, 3204 &info->modelist); 3205 fb_videomode_to_var(&var, mode); 3206 fbcon_set_disp(info, &var, vc->vc_num); 3207 } 3208} 3209 3210static void fbcon_get_requirement(struct fb_info *info, 3211 struct fb_blit_caps *caps) 3212{ 3213 struct vc_data *vc; 3214 struct display *p; 3215 3216 if (caps->flags) { 3217 int i, charcnt; 3218 3219 for (i = first_fb_vc; i <= last_fb_vc; i++) { 3220 vc = vc_cons[i].d; 3221 if (vc && vc->vc_mode == KD_TEXT && 3222 info->node == con2fb_map[i]) { 3223 p = &fb_display[i]; 3224 caps->x |= 1 << (vc->vc_font.width - 1); 3225 caps->y |= 1 << (vc->vc_font.height - 1); 3226 charcnt = (p->userfont) ? 3227 FNTCHARCNT(p->fontdata) : 256; 3228 if (caps->len < charcnt) 3229 caps->len = charcnt; 3230 } 3231 } 3232 } else { 3233 vc = vc_cons[fg_console].d; 3234 3235 if (vc && vc->vc_mode == KD_TEXT && 3236 info->node == con2fb_map[fg_console]) { 3237 p = &fb_display[fg_console]; 3238 caps->x = 1 << (vc->vc_font.width - 1); 3239 caps->y = 1 << (vc->vc_font.height - 1); 3240 caps->len = (p->userfont) ? 3241 FNTCHARCNT(p->fontdata) : 256; 3242 } 3243 } 3244} 3245 3246static int fbcon_event_notify(struct notifier_block *self, 3247 unsigned long action, void *data) 3248{ 3249 struct fb_event *event = data; 3250 struct fb_info *info = event->info; 3251 struct fb_videomode *mode; 3252 struct fb_con2fbmap *con2fb; 3253 struct fb_blit_caps *caps; 3254 int idx, ret = 0; 3255 3256 /* 3257 * ignore all events except driver registration and deregistration 3258 * if fbcon is not active 3259 */ 3260 if (fbcon_has_exited && !(action == FB_EVENT_FB_REGISTERED || 3261 action == FB_EVENT_FB_UNREGISTERED)) 3262 goto done; 3263 3264 switch(action) { 3265 case FB_EVENT_SUSPEND: 3266 fbcon_suspended(info); 3267 break; 3268 case FB_EVENT_RESUME: 3269 fbcon_resumed(info); 3270 break; 3271 case FB_EVENT_MODE_CHANGE: 3272 fbcon_modechanged(info); 3273 break; 3274 case FB_EVENT_MODE_CHANGE_ALL: 3275 fbcon_set_all_vcs(info); 3276 break; 3277 case FB_EVENT_MODE_DELETE: 3278 mode = event->data; 3279 ret = fbcon_mode_deleted(info, mode); 3280 break; 3281 case FB_EVENT_FB_UNBIND: 3282 idx = info->node; 3283 ret = fbcon_fb_unbind(idx); 3284 break; 3285 case FB_EVENT_FB_REGISTERED: 3286 ret = fbcon_fb_registered(info); 3287 break; 3288 case FB_EVENT_FB_UNREGISTERED: 3289 ret = fbcon_fb_unregistered(info); 3290 break; 3291 case FB_EVENT_SET_CONSOLE_MAP: 3292 /* called with console lock held */ 3293 con2fb = event->data; 3294 ret = set_con2fb_map(con2fb->console - 1, 3295 con2fb->framebuffer, 1); 3296 break; 3297 case FB_EVENT_GET_CONSOLE_MAP: 3298 con2fb = event->data; 3299 con2fb->framebuffer = con2fb_map[con2fb->console - 1]; 3300 break; 3301 case FB_EVENT_BLANK: 3302 fbcon_fb_blanked(info, *(int *)event->data); 3303 break; 3304 case FB_EVENT_NEW_MODELIST: 3305 fbcon_new_modelist(info); 3306 break; 3307 case FB_EVENT_GET_REQ: 3308 caps = event->data; 3309 fbcon_get_requirement(info, caps); 3310 break; 3311 case FB_EVENT_REMAP_ALL_CONSOLE: 3312 idx = info->node; 3313 fbcon_remap_all(idx); 3314 break; 3315 } 3316done: 3317 return ret; 3318} 3319 3320/* 3321 * The console `switch' structure for the frame buffer based console 3322 */ 3323 3324static const struct consw fb_con = { 3325 .owner = THIS_MODULE, 3326 .con_startup = fbcon_startup, 3327 .con_init = fbcon_init, 3328 .con_deinit = fbcon_deinit, 3329 .con_clear = fbcon_clear, 3330 .con_putc = fbcon_putc, 3331 .con_putcs = fbcon_putcs, 3332 .con_cursor = fbcon_cursor, 3333 .con_scroll = fbcon_scroll, 3334 .con_bmove = fbcon_bmove, 3335 .con_switch = fbcon_switch, 3336 .con_blank = fbcon_blank, 3337 .con_font_set = fbcon_set_font, 3338 .con_font_get = fbcon_get_font, 3339 .con_font_default = fbcon_set_def_font, 3340 .con_font_copy = fbcon_copy_font, 3341 .con_set_palette = fbcon_set_palette, 3342 .con_scrolldelta = fbcon_scrolldelta, 3343 .con_set_origin = fbcon_set_origin, 3344 .con_invert_region = fbcon_invert_region, 3345 .con_screen_pos = fbcon_screen_pos, 3346 .con_getxy = fbcon_getxy, 3347 .con_resize = fbcon_resize, 3348 .con_debug_enter = fbcon_debug_enter, 3349 .con_debug_leave = fbcon_debug_leave, 3350}; 3351 3352static struct notifier_block fbcon_event_notifier = { 3353 .notifier_call = fbcon_event_notify, 3354}; 3355 3356static ssize_t store_rotate(struct device *device, 3357 struct device_attribute *attr, const char *buf, 3358 size_t count) 3359{ 3360 struct fb_info *info; 3361 int rotate, idx; 3362 char **last = NULL; 3363 3364 if (fbcon_has_exited) 3365 return count; 3366 3367 console_lock(); 3368 idx = con2fb_map[fg_console]; 3369 3370 if (idx == -1 || registered_fb[idx] == NULL) 3371 goto err; 3372 3373 info = registered_fb[idx]; 3374 rotate = simple_strtoul(buf, last, 0); 3375 fbcon_rotate(info, rotate); 3376err: 3377 console_unlock(); 3378 return count; 3379} 3380 3381static ssize_t store_rotate_all(struct device *device, 3382 struct device_attribute *attr,const char *buf, 3383 size_t count) 3384{ 3385 struct fb_info *info; 3386 int rotate, idx; 3387 char **last = NULL; 3388 3389 if (fbcon_has_exited) 3390 return count; 3391 3392 console_lock(); 3393 idx = con2fb_map[fg_console]; 3394 3395 if (idx == -1 || registered_fb[idx] == NULL) 3396 goto err; 3397 3398 info = registered_fb[idx]; 3399 rotate = simple_strtoul(buf, last, 0); 3400 fbcon_rotate_all(info, rotate); 3401err: 3402 console_unlock(); 3403 return count; 3404} 3405 3406static ssize_t show_rotate(struct device *device, 3407 struct device_attribute *attr,char *buf) 3408{ 3409 struct fb_info *info; 3410 int rotate = 0, idx; 3411 3412 if (fbcon_has_exited) 3413 return 0; 3414 3415 console_lock(); 3416 idx = con2fb_map[fg_console]; 3417 3418 if (idx == -1 || registered_fb[idx] == NULL) 3419 goto err; 3420 3421 info = registered_fb[idx]; 3422 rotate = fbcon_get_rotate(info); 3423err: 3424 console_unlock(); 3425 return snprintf(buf, PAGE_SIZE, "%d\n", rotate); 3426} 3427 3428static ssize_t show_cursor_blink(struct device *device, 3429 struct device_attribute *attr, char *buf) 3430{ 3431 struct fb_info *info; 3432 struct fbcon_ops *ops; 3433 int idx, blink = -1; 3434 3435 if (fbcon_has_exited) 3436 return 0; 3437 3438 console_lock(); 3439 idx = con2fb_map[fg_console]; 3440 3441 if (idx == -1 || registered_fb[idx] == NULL) 3442 goto err; 3443 3444 info = registered_fb[idx]; 3445 ops = info->fbcon_par; 3446 3447 if (!ops) 3448 goto err; 3449 3450 blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0; 3451err: 3452 console_unlock(); 3453 return snprintf(buf, PAGE_SIZE, "%d\n", blink); 3454} 3455 3456static ssize_t store_cursor_blink(struct device *device, 3457 struct device_attribute *attr, 3458 const char *buf, size_t count) 3459{ 3460 struct fb_info *info; 3461 int blink, idx; 3462 char **last = NULL; 3463 3464 if (fbcon_has_exited) 3465 return count; 3466 3467 console_lock(); 3468 idx = con2fb_map[fg_console]; 3469 3470 if (idx == -1 || registered_fb[idx] == NULL) 3471 goto err; 3472 3473 info = registered_fb[idx]; 3474 3475 if (!info->fbcon_par) 3476 goto err; 3477 3478 blink = simple_strtoul(buf, last, 0); 3479 3480 if (blink) { 3481 fbcon_cursor_noblink = 0; 3482 fbcon_add_cursor_timer(info); 3483 } else { 3484 fbcon_cursor_noblink = 1; 3485 fbcon_del_cursor_timer(info); 3486 } 3487 3488err: 3489 console_unlock(); 3490 return count; 3491} 3492 3493static struct device_attribute device_attrs[] = { 3494 __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate), 3495 __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all), 3496 __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink, 3497 store_cursor_blink), 3498}; 3499 3500static int fbcon_init_device(void) 3501{ 3502 int i, error = 0; 3503 3504 fbcon_has_sysfs = 1; 3505 3506 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) { 3507 error = device_create_file(fbcon_device, &device_attrs[i]); 3508 3509 if (error) 3510 break; 3511 } 3512 3513 if (error) { 3514 while (--i >= 0) 3515 device_remove_file(fbcon_device, &device_attrs[i]); 3516 3517 fbcon_has_sysfs = 0; 3518 } 3519 3520 return 0; 3521} 3522 3523static void fbcon_start(void) 3524{ 3525 if (num_registered_fb) { 3526 int i; 3527 3528 console_lock(); 3529 3530 for (i = 0; i < FB_MAX; i++) { 3531 if (registered_fb[i] != NULL) { 3532 info_idx = i; 3533 break; 3534 } 3535 } 3536 3537 do_fbcon_takeover(0); 3538 console_unlock(); 3539 3540 } 3541} 3542 3543static void fbcon_exit(void) 3544{ 3545 struct fb_info *info; 3546 int i, j, mapped; 3547 3548 if (fbcon_has_exited) 3549 return; 3550 3551 kfree((void *)softback_buf); 3552 softback_buf = 0UL; 3553 3554 for (i = 0; i < FB_MAX; i++) { 3555 int pending = 0; 3556 3557 mapped = 0; 3558 info = registered_fb[i]; 3559 3560 if (info == NULL) 3561 continue; 3562 3563 if (info->queue.func) 3564 pending = cancel_work_sync(&info->queue); 3565 DPRINTK("fbcon: %s pending work\n", (pending ? "canceled" : 3566 "no")); 3567 3568 for (j = first_fb_vc; j <= last_fb_vc; j++) { 3569 if (con2fb_map[j] == i) { 3570 mapped = 1; 3571 break; 3572 } 3573 } 3574 3575 if (mapped) { 3576 if (info->fbops->fb_release) 3577 info->fbops->fb_release(info, 0); 3578 module_put(info->fbops->owner); 3579 3580 if (info->fbcon_par) { 3581 struct fbcon_ops *ops = info->fbcon_par; 3582 3583 fbcon_del_cursor_timer(info); 3584 kfree(ops->cursor_src); 3585 kfree(ops->cursor_state.mask); 3586 kfree(info->fbcon_par); 3587 info->fbcon_par = NULL; 3588 } 3589 3590 if (info->queue.func == fb_flashcursor) 3591 info->queue.func = NULL; 3592 } 3593 } 3594 3595 fbcon_has_exited = 1; 3596} 3597 3598static int __init fb_console_init(void) 3599{ 3600 int i; 3601 3602 console_lock(); 3603 fb_register_client(&fbcon_event_notifier); 3604 fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL, 3605 "fbcon"); 3606 3607 if (IS_ERR(fbcon_device)) { 3608 printk(KERN_WARNING "Unable to create device " 3609 "for fbcon; errno = %ld\n", 3610 PTR_ERR(fbcon_device)); 3611 fbcon_device = NULL; 3612 } else 3613 fbcon_init_device(); 3614 3615 for (i = 0; i < MAX_NR_CONSOLES; i++) 3616 con2fb_map[i] = -1; 3617 3618 console_unlock(); 3619 fbcon_start(); 3620 return 0; 3621} 3622 3623fs_initcall(fb_console_init); 3624 3625#ifdef MODULE 3626 3627static void __exit fbcon_deinit_device(void) 3628{ 3629 int i; 3630 3631 if (fbcon_has_sysfs) { 3632 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) 3633 device_remove_file(fbcon_device, &device_attrs[i]); 3634 3635 fbcon_has_sysfs = 0; 3636 } 3637} 3638 3639static void __exit fb_console_exit(void) 3640{ 3641 console_lock(); 3642 fb_unregister_client(&fbcon_event_notifier); 3643 fbcon_deinit_device(); 3644 device_destroy(fb_class, MKDEV(0, 0)); 3645 fbcon_exit(); 3646 do_unregister_con_driver(&fb_con); 3647 console_unlock(); 3648} 3649 3650module_exit(fb_console_exit); 3651 3652#endif 3653 3654MODULE_LICENSE("GPL"); 3655