1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) 1991, 1992 Linus Torvalds 4 */ 5 6 /* 7 * Hopefully this will be a rather complete VT102 implementation. 8 * 9 * Beeping thanks to John T Kohl. 10 * 11 * Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics 12 * Chars, and VT100 enhancements by Peter MacDonald. 13 * 14 * Copy and paste function by Andrew Haylett, 15 * some enhancements by Alessandro Rubini. 16 * 17 * Code to check for different video-cards mostly by Galen Hunt, 18 * <g-hunt@ee.utah.edu> 19 * 20 * Rudimentary ISO 10646/Unicode/UTF-8 character set support by 21 * Markus Kuhn, <mskuhn@immd4.informatik.uni-erlangen.de>. 22 * 23 * Dynamic allocation of consoles, aeb@cwi.nl, May 1994 24 * Resizing of consoles, aeb, 940926 25 * 26 * Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94 27 * <poe@daimi.aau.dk> 28 * 29 * User-defined bell sound, new setterm control sequences and printk 30 * redirection by Martin Mares <mj@k332.feld.cvut.cz> 19-Nov-95 31 * 32 * APM screenblank bug fixed Takashi Manabe <manabe@roy.dsl.tutics.tut.jp> 33 * 34 * Merge with the abstract console driver by Geert Uytterhoeven 35 * <geert@linux-m68k.org>, Jan 1997. 36 * 37 * Original m68k console driver modifications by 38 * 39 * - Arno Griffioen <arno@usn.nl> 40 * - David Carter <carter@cs.bris.ac.uk> 41 * 42 * The abstract console driver provides a generic interface for a text 43 * console. It supports VGA text mode, frame buffer based graphical consoles 44 * and special graphics processors that are only accessible through some 45 * registers (e.g. a TMS340x0 GSP). 46 * 47 * The interface to the hardware is specified using a special structure 48 * (struct consw) which contains function pointers to console operations 49 * (see <linux/console.h> for more information). 50 * 51 * Support for changeable cursor shape 52 * by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997 53 * 54 * Ported to i386 and con_scrolldelta fixed 55 * by Emmanuel Marty <core@ggi-project.org>, April 1998 56 * 57 * Resurrected character buffers in videoram plus lots of other trickery 58 * by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998 59 * 60 * Removed old-style timers, introduced console_timer, made timer 61 * deletion SMP-safe. 17Jun00, Andrew Morton 62 * 63 * Removed console_lock, enabled interrupts across all console operations 64 * 13 March 2001, Andrew Morton 65 * 66 * Fixed UTF-8 mode so alternate charset modes always work according 67 * to control sequences interpreted in do_con_trol function 68 * preserving backward VT100 semigraphics compatibility, 69 * malformed UTF sequences represented as sequences of replacement glyphs, 70 * original codes or '?' as a last resort if replacement glyph is undefined 71 * by Adam Tla/lka <atlka@pg.gda.pl>, Aug 2006 72 */ 73 74 #include <linux/module.h> 75 #include <linux/types.h> 76 #include <linux/sched/signal.h> 77 #include <linux/tty.h> 78 #include <linux/tty_flip.h> 79 #include <linux/kernel.h> 80 #include <linux/string.h> 81 #include <linux/errno.h> 82 #include <linux/kd.h> 83 #include <linux/slab.h> 84 #include <linux/major.h> 85 #include <linux/mm.h> 86 #include <linux/console.h> 87 #include <linux/init.h> 88 #include <linux/mutex.h> 89 #include <linux/vt_kern.h> 90 #include <linux/selection.h> 91 #include <linux/tiocl.h> 92 #include <linux/kbd_kern.h> 93 #include <linux/consolemap.h> 94 #include <linux/timer.h> 95 #include <linux/interrupt.h> 96 #include <linux/workqueue.h> 97 #include <linux/pm.h> 98 #include <linux/font.h> 99 #include <linux/bitops.h> 100 #include <linux/notifier.h> 101 #include <linux/device.h> 102 #include <linux/io.h> 103 #include <linux/uaccess.h> 104 #include <linux/kdb.h> 105 #include <linux/ctype.h> 106 #include <linux/bsearch.h> 107 #include <linux/gcd.h> 108 109 #define MAX_NR_CON_DRIVER 16 110 111 #define CON_DRIVER_FLAG_MODULE 1 112 #define CON_DRIVER_FLAG_INIT 2 113 #define CON_DRIVER_FLAG_ATTR 4 114 #define CON_DRIVER_FLAG_ZOMBIE 8 115 116 struct con_driver { 117 const struct consw *con; 118 const char *desc; 119 struct device *dev; 120 int node; 121 int first; 122 int last; 123 int flag; 124 }; 125 126 static struct con_driver registered_con_driver[MAX_NR_CON_DRIVER]; 127 const struct consw *conswitchp; 128 129 /* A bitmap for codes <32. A bit of 1 indicates that the code 130 * corresponding to that bit number invokes some special action 131 * (such as cursor movement) and should not be displayed as a 132 * glyph unless the disp_ctrl mode is explicitly enabled. 133 */ 134 #define CTRL_ACTION 0x0d00ff81 135 #define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */ 136 137 /* 138 * Here is the default bell parameters: 750HZ, 1/8th of a second 139 */ 140 #define DEFAULT_BELL_PITCH 750 141 #define DEFAULT_BELL_DURATION (HZ/8) 142 #define DEFAULT_CURSOR_BLINK_MS 200 143 144 struct vc vc_cons [MAX_NR_CONSOLES]; 145 146 #ifndef VT_SINGLE_DRIVER 147 static const struct consw *con_driver_map[MAX_NR_CONSOLES]; 148 #endif 149 150 static int con_open(struct tty_struct *, struct file *); 151 static void vc_init(struct vc_data *vc, unsigned int rows, 152 unsigned int cols, int do_clear); 153 static void gotoxy(struct vc_data *vc, int new_x, int new_y); 154 static void save_cur(struct vc_data *vc); 155 static void reset_terminal(struct vc_data *vc, int do_clear); 156 static void con_flush_chars(struct tty_struct *tty); 157 static int set_vesa_blanking(char __user *p); 158 static void set_cursor(struct vc_data *vc); 159 static void hide_cursor(struct vc_data *vc); 160 static void console_callback(struct work_struct *ignored); 161 static void con_driver_unregister_callback(struct work_struct *ignored); 162 static void blank_screen_t(struct timer_list *unused); 163 static void set_palette(struct vc_data *vc); 164 165 #define vt_get_kmsg_redirect() vt_kmsg_redirect(-1) 166 167 static int printable; /* Is console ready for printing? */ 168 int default_utf8 = true; 169 module_param(default_utf8, int, S_IRUGO | S_IWUSR); 170 int global_cursor_default = -1; 171 module_param(global_cursor_default, int, S_IRUGO | S_IWUSR); 172 173 static int cur_default = CUR_DEFAULT; 174 module_param(cur_default, int, S_IRUGO | S_IWUSR); 175 176 /* 177 * ignore_poke: don't unblank the screen when things are typed. This is 178 * mainly for the privacy of braille terminal users. 179 */ 180 static int ignore_poke; 181 182 int do_poke_blanked_console; 183 int console_blanked; 184 185 static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */ 186 static int vesa_off_interval; 187 static int blankinterval; 188 core_param(consoleblank, blankinterval, int, 0444); 189 190 static DECLARE_WORK(console_work, console_callback); 191 static DECLARE_WORK(con_driver_unregister_work, con_driver_unregister_callback); 192 193 /* 194 * fg_console is the current virtual console, 195 * last_console is the last used one, 196 * want_console is the console we want to switch to, 197 * saved_* variants are for save/restore around kernel debugger enter/leave 198 */ 199 int fg_console; 200 int last_console; 201 int want_console = -1; 202 static int saved_fg_console; 203 static int saved_last_console; 204 static int saved_want_console; 205 static int saved_vc_mode; 206 static int saved_console_blanked; 207 208 /* 209 * For each existing display, we have a pointer to console currently visible 210 * on that display, allowing consoles other than fg_console to be refreshed 211 * appropriately. Unless the low-level driver supplies its own display_fg 212 * variable, we use this one for the "master display". 213 */ 214 static struct vc_data *master_display_fg; 215 216 /* 217 * Unfortunately, we need to delay tty echo when we're currently writing to the 218 * console since the code is (and always was) not re-entrant, so we schedule 219 * all flip requests to process context with schedule-task() and run it from 220 * console_callback(). 221 */ 222 223 /* 224 * For the same reason, we defer scrollback to the console callback. 225 */ 226 static int scrollback_delta; 227 228 /* 229 * Hook so that the power management routines can (un)blank 230 * the console on our behalf. 231 */ 232 int (*console_blank_hook)(int); 233 234 static DEFINE_TIMER(console_timer, blank_screen_t); 235 static int blank_state; 236 static int blank_timer_expired; 237 enum { 238 blank_off = 0, 239 blank_normal_wait, 240 blank_vesa_wait, 241 }; 242 243 /* 244 * /sys/class/tty/tty0/ 245 * 246 * the attribute 'active' contains the name of the current vc 247 * console and it supports poll() to detect vc switches 248 */ 249 static struct device *tty0dev; 250 251 /* 252 * Notifier list for console events. 253 */ 254 static ATOMIC_NOTIFIER_HEAD(vt_notifier_list); 255 256 int register_vt_notifier(struct notifier_block *nb) 257 { 258 return atomic_notifier_chain_register(&vt_notifier_list, nb); 259 } 260 EXPORT_SYMBOL_GPL(register_vt_notifier); 261 262 int unregister_vt_notifier(struct notifier_block *nb) 263 { 264 return atomic_notifier_chain_unregister(&vt_notifier_list, nb); 265 } 266 EXPORT_SYMBOL_GPL(unregister_vt_notifier); 267 268 static void notify_write(struct vc_data *vc, unsigned int unicode) 269 { 270 struct vt_notifier_param param = { .vc = vc, .c = unicode }; 271 atomic_notifier_call_chain(&vt_notifier_list, VT_WRITE, ¶m); 272 } 273 274 static void notify_update(struct vc_data *vc) 275 { 276 struct vt_notifier_param param = { .vc = vc }; 277 atomic_notifier_call_chain(&vt_notifier_list, VT_UPDATE, ¶m); 278 } 279 /* 280 * Low-Level Functions 281 */ 282 283 static inline bool con_is_fg(const struct vc_data *vc) 284 { 285 return vc->vc_num == fg_console; 286 } 287 288 static inline bool con_should_update(const struct vc_data *vc) 289 { 290 return con_is_visible(vc) && !console_blanked; 291 } 292 293 static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed) 294 { 295 unsigned short *p; 296 297 if (!viewed) 298 p = (unsigned short *)(vc->vc_origin + offset); 299 else if (!vc->vc_sw->con_screen_pos) 300 p = (unsigned short *)(vc->vc_visible_origin + offset); 301 else 302 p = vc->vc_sw->con_screen_pos(vc, offset); 303 return p; 304 } 305 306 /* Called from the keyboard irq path.. */ 307 static inline void scrolldelta(int lines) 308 { 309 /* FIXME */ 310 /* scrolldelta needs some kind of consistency lock, but the BKL was 311 and still is not protecting versus the scheduled back end */ 312 scrollback_delta += lines; 313 schedule_console_callback(); 314 } 315 316 void schedule_console_callback(void) 317 { 318 schedule_work(&console_work); 319 } 320 321 /* 322 * Code to manage unicode-based screen buffers 323 */ 324 325 #ifdef NO_VC_UNI_SCREEN 326 /* this disables and optimizes related code away at compile time */ 327 #define get_vc_uniscr(vc) NULL 328 #else 329 #define get_vc_uniscr(vc) vc->vc_uni_screen 330 #endif 331 332 #define VC_UNI_SCREEN_DEBUG 0 333 334 typedef uint32_t char32_t; 335 336 /* 337 * Our screen buffer is preceded by an array of line pointers so that 338 * scrolling only implies some pointer shuffling. 339 */ 340 struct uni_screen { 341 char32_t *lines[0]; 342 }; 343 344 static struct uni_screen *vc_uniscr_alloc(unsigned int cols, unsigned int rows) 345 { 346 struct uni_screen *uniscr; 347 void *p; 348 unsigned int memsize, i; 349 350 /* allocate everything in one go */ 351 memsize = cols * rows * sizeof(char32_t); 352 memsize += rows * sizeof(char32_t *); 353 p = kmalloc(memsize, GFP_KERNEL); 354 if (!p) 355 return NULL; 356 357 /* initial line pointers */ 358 uniscr = p; 359 p = uniscr->lines + rows; 360 for (i = 0; i < rows; i++) { 361 uniscr->lines[i] = p; 362 p += cols * sizeof(char32_t); 363 } 364 return uniscr; 365 } 366 367 static void vc_uniscr_set(struct vc_data *vc, struct uni_screen *new_uniscr) 368 { 369 kfree(vc->vc_uni_screen); 370 vc->vc_uni_screen = new_uniscr; 371 } 372 373 static void vc_uniscr_putc(struct vc_data *vc, char32_t uc) 374 { 375 struct uni_screen *uniscr = get_vc_uniscr(vc); 376 377 if (uniscr) 378 uniscr->lines[vc->vc_y][vc->vc_x] = uc; 379 } 380 381 static void vc_uniscr_insert(struct vc_data *vc, unsigned int nr) 382 { 383 struct uni_screen *uniscr = get_vc_uniscr(vc); 384 385 if (uniscr) { 386 char32_t *ln = uniscr->lines[vc->vc_y]; 387 unsigned int x = vc->vc_x, cols = vc->vc_cols; 388 389 memmove(&ln[x + nr], &ln[x], (cols - x - nr) * sizeof(*ln)); 390 memset32(&ln[x], ' ', nr); 391 } 392 } 393 394 static void vc_uniscr_delete(struct vc_data *vc, unsigned int nr) 395 { 396 struct uni_screen *uniscr = get_vc_uniscr(vc); 397 398 if (uniscr) { 399 char32_t *ln = uniscr->lines[vc->vc_y]; 400 unsigned int x = vc->vc_x, cols = vc->vc_cols; 401 402 memcpy(&ln[x], &ln[x + nr], (cols - x - nr) * sizeof(*ln)); 403 memset32(&ln[cols - nr], ' ', nr); 404 } 405 } 406 407 static void vc_uniscr_clear_line(struct vc_data *vc, unsigned int x, 408 unsigned int nr) 409 { 410 struct uni_screen *uniscr = get_vc_uniscr(vc); 411 412 if (uniscr) { 413 char32_t *ln = uniscr->lines[vc->vc_y]; 414 415 memset32(&ln[x], ' ', nr); 416 } 417 } 418 419 static void vc_uniscr_clear_lines(struct vc_data *vc, unsigned int y, 420 unsigned int nr) 421 { 422 struct uni_screen *uniscr = get_vc_uniscr(vc); 423 424 if (uniscr) { 425 unsigned int cols = vc->vc_cols; 426 427 while (nr--) 428 memset32(uniscr->lines[y++], ' ', cols); 429 } 430 } 431 432 static void vc_uniscr_scroll(struct vc_data *vc, unsigned int t, unsigned int b, 433 enum con_scroll dir, unsigned int nr) 434 { 435 struct uni_screen *uniscr = get_vc_uniscr(vc); 436 437 if (uniscr) { 438 unsigned int i, j, k, sz, d, clear; 439 440 sz = b - t; 441 clear = b - nr; 442 d = nr; 443 if (dir == SM_DOWN) { 444 clear = t; 445 d = sz - nr; 446 } 447 for (i = 0; i < gcd(d, sz); i++) { 448 char32_t *tmp = uniscr->lines[t + i]; 449 j = i; 450 while (1) { 451 k = j + d; 452 if (k >= sz) 453 k -= sz; 454 if (k == i) 455 break; 456 uniscr->lines[t + j] = uniscr->lines[t + k]; 457 j = k; 458 } 459 uniscr->lines[t + j] = tmp; 460 } 461 vc_uniscr_clear_lines(vc, clear, nr); 462 } 463 } 464 465 static void vc_uniscr_copy_area(struct uni_screen *dst, 466 unsigned int dst_cols, 467 unsigned int dst_rows, 468 struct uni_screen *src, 469 unsigned int src_cols, 470 unsigned int src_top_row, 471 unsigned int src_bot_row) 472 { 473 unsigned int dst_row = 0; 474 475 if (!dst) 476 return; 477 478 while (src_top_row < src_bot_row) { 479 char32_t *src_line = src->lines[src_top_row]; 480 char32_t *dst_line = dst->lines[dst_row]; 481 482 memcpy(dst_line, src_line, src_cols * sizeof(char32_t)); 483 if (dst_cols - src_cols) 484 memset32(dst_line + src_cols, ' ', dst_cols - src_cols); 485 src_top_row++; 486 dst_row++; 487 } 488 while (dst_row < dst_rows) { 489 char32_t *dst_line = dst->lines[dst_row]; 490 491 memset32(dst_line, ' ', dst_cols); 492 dst_row++; 493 } 494 } 495 496 /* 497 * Called from vcs_read() to make sure unicode screen retrieval is possible. 498 * This will initialize the unicode screen buffer if not already done. 499 * This returns 0 if OK, or a negative error code otherwise. 500 * In particular, -ENODATA is returned if the console is not in UTF-8 mode. 501 */ 502 int vc_uniscr_check(struct vc_data *vc) 503 { 504 struct uni_screen *uniscr; 505 unsigned short *p; 506 int x, y, mask; 507 508 if (__is_defined(NO_VC_UNI_SCREEN)) 509 return -EOPNOTSUPP; 510 511 WARN_CONSOLE_UNLOCKED(); 512 513 if (!vc->vc_utf) 514 return -ENODATA; 515 516 if (vc->vc_uni_screen) 517 return 0; 518 519 uniscr = vc_uniscr_alloc(vc->vc_cols, vc->vc_rows); 520 if (!uniscr) 521 return -ENOMEM; 522 523 /* 524 * Let's populate it initially with (imperfect) reverse translation. 525 * This is the next best thing we can do short of having it enabled 526 * from the start even when no users rely on this functionality. True 527 * unicode content will be available after a complete screen refresh. 528 */ 529 p = (unsigned short *)vc->vc_origin; 530 mask = vc->vc_hi_font_mask | 0xff; 531 for (y = 0; y < vc->vc_rows; y++) { 532 char32_t *line = uniscr->lines[y]; 533 for (x = 0; x < vc->vc_cols; x++) { 534 u16 glyph = scr_readw(p++) & mask; 535 line[x] = inverse_translate(vc, glyph, true); 536 } 537 } 538 539 vc->vc_uni_screen = uniscr; 540 return 0; 541 } 542 543 /* 544 * Called from vcs_read() to get the unicode data from the screen. 545 * This must be preceded by a successful call to vc_uniscr_check() once 546 * the console lock has been taken. 547 */ 548 void vc_uniscr_copy_line(struct vc_data *vc, void *dest, int viewed, 549 unsigned int row, unsigned int col, unsigned int nr) 550 { 551 struct uni_screen *uniscr = get_vc_uniscr(vc); 552 int offset = row * vc->vc_size_row + col * 2; 553 unsigned long pos; 554 555 BUG_ON(!uniscr); 556 557 pos = (unsigned long)screenpos(vc, offset, viewed); 558 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) { 559 /* 560 * Desired position falls in the main screen buffer. 561 * However the actual row/col might be different if 562 * scrollback is active. 563 */ 564 row = (pos - vc->vc_origin) / vc->vc_size_row; 565 col = ((pos - vc->vc_origin) % vc->vc_size_row) / 2; 566 memcpy(dest, &uniscr->lines[row][col], nr * sizeof(char32_t)); 567 } else { 568 /* 569 * Scrollback is active. For now let's simply backtranslate 570 * the screen glyphs until the unicode screen buffer does 571 * synchronize with console display drivers for a scrollback 572 * buffer of its own. 573 */ 574 u16 *p = (u16 *)pos; 575 int mask = vc->vc_hi_font_mask | 0xff; 576 char32_t *uni_buf = dest; 577 while (nr--) { 578 u16 glyph = scr_readw(p++) & mask; 579 *uni_buf++ = inverse_translate(vc, glyph, true); 580 } 581 } 582 } 583 584 /* this is for validation and debugging only */ 585 static void vc_uniscr_debug_check(struct vc_data *vc) 586 { 587 struct uni_screen *uniscr = get_vc_uniscr(vc); 588 unsigned short *p; 589 int x, y, mask; 590 591 if (!VC_UNI_SCREEN_DEBUG || !uniscr) 592 return; 593 594 WARN_CONSOLE_UNLOCKED(); 595 596 /* 597 * Make sure our unicode screen translates into the same glyphs 598 * as the actual screen. This is brutal indeed. 599 */ 600 p = (unsigned short *)vc->vc_origin; 601 mask = vc->vc_hi_font_mask | 0xff; 602 for (y = 0; y < vc->vc_rows; y++) { 603 char32_t *line = uniscr->lines[y]; 604 for (x = 0; x < vc->vc_cols; x++) { 605 u16 glyph = scr_readw(p++) & mask; 606 char32_t uc = line[x]; 607 int tc = conv_uni_to_pc(vc, uc); 608 if (tc == -4) 609 tc = conv_uni_to_pc(vc, 0xfffd); 610 if (tc == -4) 611 tc = conv_uni_to_pc(vc, '?'); 612 if (tc != glyph) 613 pr_err_ratelimited( 614 "%s: mismatch at %d,%d: glyph=%#x tc=%#x\n", 615 __func__, x, y, glyph, tc); 616 } 617 } 618 } 619 620 621 static void con_scroll(struct vc_data *vc, unsigned int t, unsigned int b, 622 enum con_scroll dir, unsigned int nr) 623 { 624 u16 *clear, *d, *s; 625 626 if (t + nr >= b) 627 nr = b - t - 1; 628 if (b > vc->vc_rows || t >= b || nr < 1) 629 return; 630 vc_uniscr_scroll(vc, t, b, dir, nr); 631 if (con_is_visible(vc) && vc->vc_sw->con_scroll(vc, t, b, dir, nr)) 632 return; 633 634 s = clear = (u16 *)(vc->vc_origin + vc->vc_size_row * t); 635 d = (u16 *)(vc->vc_origin + vc->vc_size_row * (t + nr)); 636 637 if (dir == SM_UP) { 638 clear = s + (b - t - nr) * vc->vc_cols; 639 swap(s, d); 640 } 641 scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row); 642 scr_memsetw(clear, vc->vc_video_erase_char, vc->vc_size_row * nr); 643 } 644 645 static void do_update_region(struct vc_data *vc, unsigned long start, int count) 646 { 647 unsigned int xx, yy, offset; 648 u16 *p; 649 650 p = (u16 *) start; 651 if (!vc->vc_sw->con_getxy) { 652 offset = (start - vc->vc_origin) / 2; 653 xx = offset % vc->vc_cols; 654 yy = offset / vc->vc_cols; 655 } else { 656 int nxx, nyy; 657 start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy); 658 xx = nxx; yy = nyy; 659 } 660 for(;;) { 661 u16 attrib = scr_readw(p) & 0xff00; 662 int startx = xx; 663 u16 *q = p; 664 while (xx < vc->vc_cols && count) { 665 if (attrib != (scr_readw(p) & 0xff00)) { 666 if (p > q) 667 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx); 668 startx = xx; 669 q = p; 670 attrib = scr_readw(p) & 0xff00; 671 } 672 p++; 673 xx++; 674 count--; 675 } 676 if (p > q) 677 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx); 678 if (!count) 679 break; 680 xx = 0; 681 yy++; 682 if (vc->vc_sw->con_getxy) { 683 p = (u16 *)start; 684 start = vc->vc_sw->con_getxy(vc, start, NULL, NULL); 685 } 686 } 687 } 688 689 void update_region(struct vc_data *vc, unsigned long start, int count) 690 { 691 WARN_CONSOLE_UNLOCKED(); 692 693 if (con_should_update(vc)) { 694 hide_cursor(vc); 695 do_update_region(vc, start, count); 696 set_cursor(vc); 697 } 698 } 699 700 /* Structure of attributes is hardware-dependent */ 701 702 static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink, 703 u8 _underline, u8 _reverse, u8 _italic) 704 { 705 if (vc->vc_sw->con_build_attr) 706 return vc->vc_sw->con_build_attr(vc, _color, _intensity, 707 _blink, _underline, _reverse, _italic); 708 709 /* 710 * ++roman: I completely changed the attribute format for monochrome 711 * mode (!can_do_color). The formerly used MDA (monochrome display 712 * adapter) format didn't allow the combination of certain effects. 713 * Now the attribute is just a bit vector: 714 * Bit 0..1: intensity (0..2) 715 * Bit 2 : underline 716 * Bit 3 : reverse 717 * Bit 7 : blink 718 */ 719 { 720 u8 a = _color; 721 if (!vc->vc_can_do_color) 722 return _intensity | 723 (_italic ? 2 : 0) | 724 (_underline ? 4 : 0) | 725 (_reverse ? 8 : 0) | 726 (_blink ? 0x80 : 0); 727 if (_italic) 728 a = (a & 0xF0) | vc->vc_itcolor; 729 else if (_underline) 730 a = (a & 0xf0) | vc->vc_ulcolor; 731 else if (_intensity == 0) 732 a = (a & 0xf0) | vc->vc_halfcolor; 733 if (_reverse) 734 a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77); 735 if (_blink) 736 a ^= 0x80; 737 if (_intensity == 2) 738 a ^= 0x08; 739 if (vc->vc_hi_font_mask == 0x100) 740 a <<= 1; 741 return a; 742 } 743 } 744 745 static void update_attr(struct vc_data *vc) 746 { 747 vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity, 748 vc->vc_blink, vc->vc_underline, 749 vc->vc_reverse ^ vc->vc_decscnm, vc->vc_italic); 750 vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm, 0) << 8) | ' '; 751 } 752 753 /* Note: inverting the screen twice should revert to the original state */ 754 void invert_screen(struct vc_data *vc, int offset, int count, int viewed) 755 { 756 unsigned short *p; 757 758 WARN_CONSOLE_UNLOCKED(); 759 760 count /= 2; 761 p = screenpos(vc, offset, viewed); 762 if (vc->vc_sw->con_invert_region) { 763 vc->vc_sw->con_invert_region(vc, p, count); 764 } else { 765 u16 *q = p; 766 int cnt = count; 767 u16 a; 768 769 if (!vc->vc_can_do_color) { 770 while (cnt--) { 771 a = scr_readw(q); 772 a ^= 0x0800; 773 scr_writew(a, q); 774 q++; 775 } 776 } else if (vc->vc_hi_font_mask == 0x100) { 777 while (cnt--) { 778 a = scr_readw(q); 779 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4); 780 scr_writew(a, q); 781 q++; 782 } 783 } else { 784 while (cnt--) { 785 a = scr_readw(q); 786 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4); 787 scr_writew(a, q); 788 q++; 789 } 790 } 791 } 792 793 if (con_should_update(vc)) 794 do_update_region(vc, (unsigned long) p, count); 795 notify_update(vc); 796 } 797 798 /* used by selection: complement pointer position */ 799 void complement_pos(struct vc_data *vc, int offset) 800 { 801 static int old_offset = -1; 802 static unsigned short old; 803 static unsigned short oldx, oldy; 804 805 WARN_CONSOLE_UNLOCKED(); 806 807 if (old_offset != -1 && old_offset >= 0 && 808 old_offset < vc->vc_screenbuf_size) { 809 scr_writew(old, screenpos(vc, old_offset, 1)); 810 if (con_should_update(vc)) 811 vc->vc_sw->con_putc(vc, old, oldy, oldx); 812 notify_update(vc); 813 } 814 815 old_offset = offset; 816 817 if (offset != -1 && offset >= 0 && 818 offset < vc->vc_screenbuf_size) { 819 unsigned short new; 820 unsigned short *p; 821 p = screenpos(vc, offset, 1); 822 old = scr_readw(p); 823 new = old ^ vc->vc_complement_mask; 824 scr_writew(new, p); 825 if (con_should_update(vc)) { 826 oldx = (offset >> 1) % vc->vc_cols; 827 oldy = (offset >> 1) / vc->vc_cols; 828 vc->vc_sw->con_putc(vc, new, oldy, oldx); 829 } 830 notify_update(vc); 831 } 832 } 833 834 static void insert_char(struct vc_data *vc, unsigned int nr) 835 { 836 unsigned short *p = (unsigned short *) vc->vc_pos; 837 838 vc_uniscr_insert(vc, nr); 839 scr_memmovew(p + nr, p, (vc->vc_cols - vc->vc_x - nr) * 2); 840 scr_memsetw(p, vc->vc_video_erase_char, nr * 2); 841 vc->vc_need_wrap = 0; 842 if (con_should_update(vc)) 843 do_update_region(vc, (unsigned long) p, 844 vc->vc_cols - vc->vc_x); 845 } 846 847 static void delete_char(struct vc_data *vc, unsigned int nr) 848 { 849 unsigned short *p = (unsigned short *) vc->vc_pos; 850 851 vc_uniscr_delete(vc, nr); 852 scr_memcpyw(p, p + nr, (vc->vc_cols - vc->vc_x - nr) * 2); 853 scr_memsetw(p + vc->vc_cols - vc->vc_x - nr, vc->vc_video_erase_char, 854 nr * 2); 855 vc->vc_need_wrap = 0; 856 if (con_should_update(vc)) 857 do_update_region(vc, (unsigned long) p, 858 vc->vc_cols - vc->vc_x); 859 } 860 861 static int softcursor_original = -1; 862 863 static void add_softcursor(struct vc_data *vc) 864 { 865 int i = scr_readw((u16 *) vc->vc_pos); 866 u32 type = vc->vc_cursor_type; 867 868 if (! (type & 0x10)) return; 869 if (softcursor_original != -1) return; 870 softcursor_original = i; 871 i |= ((type >> 8) & 0xff00 ); 872 i ^= ((type) & 0xff00 ); 873 if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000; 874 if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700; 875 scr_writew(i, (u16 *) vc->vc_pos); 876 if (con_should_update(vc)) 877 vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x); 878 } 879 880 static void hide_softcursor(struct vc_data *vc) 881 { 882 if (softcursor_original != -1) { 883 scr_writew(softcursor_original, (u16 *)vc->vc_pos); 884 if (con_should_update(vc)) 885 vc->vc_sw->con_putc(vc, softcursor_original, 886 vc->vc_y, vc->vc_x); 887 softcursor_original = -1; 888 } 889 } 890 891 static void hide_cursor(struct vc_data *vc) 892 { 893 if (vc == sel_cons) 894 clear_selection(); 895 vc->vc_sw->con_cursor(vc, CM_ERASE); 896 hide_softcursor(vc); 897 } 898 899 static void set_cursor(struct vc_data *vc) 900 { 901 if (!con_is_fg(vc) || console_blanked || vc->vc_mode == KD_GRAPHICS) 902 return; 903 if (vc->vc_deccm) { 904 if (vc == sel_cons) 905 clear_selection(); 906 add_softcursor(vc); 907 if ((vc->vc_cursor_type & 0x0f) != 1) 908 vc->vc_sw->con_cursor(vc, CM_DRAW); 909 } else 910 hide_cursor(vc); 911 } 912 913 static void set_origin(struct vc_data *vc) 914 { 915 WARN_CONSOLE_UNLOCKED(); 916 917 if (!con_is_visible(vc) || 918 !vc->vc_sw->con_set_origin || 919 !vc->vc_sw->con_set_origin(vc)) 920 vc->vc_origin = (unsigned long)vc->vc_screenbuf; 921 vc->vc_visible_origin = vc->vc_origin; 922 vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size; 923 vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x; 924 } 925 926 static void save_screen(struct vc_data *vc) 927 { 928 WARN_CONSOLE_UNLOCKED(); 929 930 if (vc->vc_sw->con_save_screen) 931 vc->vc_sw->con_save_screen(vc); 932 } 933 934 static void flush_scrollback(struct vc_data *vc) 935 { 936 WARN_CONSOLE_UNLOCKED(); 937 938 set_origin(vc); 939 if (vc->vc_sw->con_flush_scrollback) 940 vc->vc_sw->con_flush_scrollback(vc); 941 else 942 vc->vc_sw->con_switch(vc); 943 } 944 945 /* 946 * Redrawing of screen 947 */ 948 949 void clear_buffer_attributes(struct vc_data *vc) 950 { 951 unsigned short *p = (unsigned short *)vc->vc_origin; 952 int count = vc->vc_screenbuf_size / 2; 953 int mask = vc->vc_hi_font_mask | 0xff; 954 955 for (; count > 0; count--, p++) { 956 scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p); 957 } 958 } 959 960 void redraw_screen(struct vc_data *vc, int is_switch) 961 { 962 int redraw = 0; 963 964 WARN_CONSOLE_UNLOCKED(); 965 966 if (!vc) { 967 /* strange ... */ 968 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */ 969 return; 970 } 971 972 if (is_switch) { 973 struct vc_data *old_vc = vc_cons[fg_console].d; 974 if (old_vc == vc) 975 return; 976 if (!con_is_visible(vc)) 977 redraw = 1; 978 *vc->vc_display_fg = vc; 979 fg_console = vc->vc_num; 980 hide_cursor(old_vc); 981 if (!con_is_visible(old_vc)) { 982 save_screen(old_vc); 983 set_origin(old_vc); 984 } 985 if (tty0dev) 986 sysfs_notify(&tty0dev->kobj, NULL, "active"); 987 } else { 988 hide_cursor(vc); 989 redraw = 1; 990 } 991 992 if (redraw) { 993 int update; 994 int old_was_color = vc->vc_can_do_color; 995 996 set_origin(vc); 997 update = vc->vc_sw->con_switch(vc); 998 set_palette(vc); 999 /* 1000 * If console changed from mono<->color, the best we can do 1001 * is to clear the buffer attributes. As it currently stands, 1002 * rebuilding new attributes from the old buffer is not doable 1003 * without overly complex code. 1004 */ 1005 if (old_was_color != vc->vc_can_do_color) { 1006 update_attr(vc); 1007 clear_buffer_attributes(vc); 1008 } 1009 1010 if (update && vc->vc_mode != KD_GRAPHICS) 1011 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2); 1012 } 1013 set_cursor(vc); 1014 if (is_switch) { 1015 set_leds(); 1016 compute_shiftstate(); 1017 notify_update(vc); 1018 } 1019 } 1020 1021 /* 1022 * Allocation, freeing and resizing of VTs. 1023 */ 1024 1025 int vc_cons_allocated(unsigned int i) 1026 { 1027 return (i < MAX_NR_CONSOLES && vc_cons[i].d); 1028 } 1029 1030 static void visual_init(struct vc_data *vc, int num, int init) 1031 { 1032 /* ++Geert: vc->vc_sw->con_init determines console size */ 1033 if (vc->vc_sw) 1034 module_put(vc->vc_sw->owner); 1035 vc->vc_sw = conswitchp; 1036 #ifndef VT_SINGLE_DRIVER 1037 if (con_driver_map[num]) 1038 vc->vc_sw = con_driver_map[num]; 1039 #endif 1040 __module_get(vc->vc_sw->owner); 1041 vc->vc_num = num; 1042 vc->vc_display_fg = &master_display_fg; 1043 if (vc->vc_uni_pagedir_loc) 1044 con_free_unimap(vc); 1045 vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir; 1046 vc->vc_uni_pagedir = NULL; 1047 vc->vc_hi_font_mask = 0; 1048 vc->vc_complement_mask = 0; 1049 vc->vc_can_do_color = 0; 1050 vc->vc_cur_blink_ms = DEFAULT_CURSOR_BLINK_MS; 1051 vc->vc_sw->con_init(vc, init); 1052 if (!vc->vc_complement_mask) 1053 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 1054 vc->vc_s_complement_mask = vc->vc_complement_mask; 1055 vc->vc_size_row = vc->vc_cols << 1; 1056 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row; 1057 } 1058 1059 1060 static void visual_deinit(struct vc_data *vc) 1061 { 1062 vc->vc_sw->con_deinit(vc); 1063 module_put(vc->vc_sw->owner); 1064 } 1065 1066 int vc_allocate(unsigned int currcons) /* return 0 on success */ 1067 { 1068 struct vt_notifier_param param; 1069 struct vc_data *vc; 1070 1071 WARN_CONSOLE_UNLOCKED(); 1072 1073 if (currcons >= MAX_NR_CONSOLES) 1074 return -ENXIO; 1075 1076 if (vc_cons[currcons].d) 1077 return 0; 1078 1079 /* due to the granularity of kmalloc, we waste some memory here */ 1080 /* the alloc is done in two steps, to optimize the common situation 1081 of a 25x80 console (structsize=216, screenbuf_size=4000) */ 1082 /* although the numbers above are not valid since long ago, the 1083 point is still up-to-date and the comment still has its value 1084 even if only as a historical artifact. --mj, July 1998 */ 1085 param.vc = vc = kzalloc(sizeof(struct vc_data), GFP_KERNEL); 1086 if (!vc) 1087 return -ENOMEM; 1088 1089 vc_cons[currcons].d = vc; 1090 tty_port_init(&vc->port); 1091 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK); 1092 1093 visual_init(vc, currcons, 1); 1094 1095 if (!*vc->vc_uni_pagedir_loc) 1096 con_set_default_unimap(vc); 1097 1098 vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_KERNEL); 1099 if (!vc->vc_screenbuf) 1100 goto err_free; 1101 1102 /* If no drivers have overridden us and the user didn't pass a 1103 boot option, default to displaying the cursor */ 1104 if (global_cursor_default == -1) 1105 global_cursor_default = 1; 1106 1107 vc_init(vc, vc->vc_rows, vc->vc_cols, 1); 1108 vcs_make_sysfs(currcons); 1109 atomic_notifier_call_chain(&vt_notifier_list, VT_ALLOCATE, ¶m); 1110 1111 return 0; 1112 err_free: 1113 visual_deinit(vc); 1114 kfree(vc); 1115 vc_cons[currcons].d = NULL; 1116 return -ENOMEM; 1117 } 1118 1119 static inline int resize_screen(struct vc_data *vc, int width, int height, 1120 int user) 1121 { 1122 /* Resizes the resolution of the display adapater */ 1123 int err = 0; 1124 1125 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize) 1126 err = vc->vc_sw->con_resize(vc, width, height, user); 1127 1128 return err; 1129 } 1130 1131 /* 1132 * Change # of rows and columns (0 means unchanged/the size of fg_console) 1133 * [this is to be used together with some user program 1134 * like resize that changes the hardware videomode] 1135 */ 1136 #define VC_RESIZE_MAXCOL (32767) 1137 #define VC_RESIZE_MAXROW (32767) 1138 1139 /** 1140 * vc_do_resize - resizing method for the tty 1141 * @tty: tty being resized 1142 * @real_tty: real tty (different to tty if a pty/tty pair) 1143 * @vc: virtual console private data 1144 * @cols: columns 1145 * @lines: lines 1146 * 1147 * Resize a virtual console, clipping according to the actual constraints. 1148 * If the caller passes a tty structure then update the termios winsize 1149 * information and perform any necessary signal handling. 1150 * 1151 * Caller must hold the console semaphore. Takes the termios rwsem and 1152 * ctrl_lock of the tty IFF a tty is passed. 1153 */ 1154 1155 static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc, 1156 unsigned int cols, unsigned int lines) 1157 { 1158 unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0; 1159 unsigned long end; 1160 unsigned int old_rows, old_row_size, first_copied_row; 1161 unsigned int new_cols, new_rows, new_row_size, new_screen_size; 1162 unsigned int user; 1163 unsigned short *newscreen; 1164 struct uni_screen *new_uniscr = NULL; 1165 1166 WARN_CONSOLE_UNLOCKED(); 1167 1168 if (!vc) 1169 return -ENXIO; 1170 1171 user = vc->vc_resize_user; 1172 vc->vc_resize_user = 0; 1173 1174 if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW) 1175 return -EINVAL; 1176 1177 new_cols = (cols ? cols : vc->vc_cols); 1178 new_rows = (lines ? lines : vc->vc_rows); 1179 new_row_size = new_cols << 1; 1180 new_screen_size = new_row_size * new_rows; 1181 1182 if (new_cols == vc->vc_cols && new_rows == vc->vc_rows) 1183 return 0; 1184 1185 if (new_screen_size > (4 << 20)) 1186 return -EINVAL; 1187 newscreen = kzalloc(new_screen_size, GFP_USER); 1188 if (!newscreen) 1189 return -ENOMEM; 1190 1191 if (get_vc_uniscr(vc)) { 1192 new_uniscr = vc_uniscr_alloc(new_cols, new_rows); 1193 if (!new_uniscr) { 1194 kfree(newscreen); 1195 return -ENOMEM; 1196 } 1197 } 1198 1199 if (vc == sel_cons) 1200 clear_selection(); 1201 1202 old_rows = vc->vc_rows; 1203 old_row_size = vc->vc_size_row; 1204 1205 err = resize_screen(vc, new_cols, new_rows, user); 1206 if (err) { 1207 kfree(newscreen); 1208 kfree(new_uniscr); 1209 return err; 1210 } 1211 1212 vc->vc_rows = new_rows; 1213 vc->vc_cols = new_cols; 1214 vc->vc_size_row = new_row_size; 1215 vc->vc_screenbuf_size = new_screen_size; 1216 1217 rlth = min(old_row_size, new_row_size); 1218 rrem = new_row_size - rlth; 1219 old_origin = vc->vc_origin; 1220 new_origin = (long) newscreen; 1221 new_scr_end = new_origin + new_screen_size; 1222 1223 if (vc->vc_y > new_rows) { 1224 if (old_rows - vc->vc_y < new_rows) { 1225 /* 1226 * Cursor near the bottom, copy contents from the 1227 * bottom of buffer 1228 */ 1229 first_copied_row = (old_rows - new_rows); 1230 } else { 1231 /* 1232 * Cursor is in no man's land, copy 1/2 screenful 1233 * from the top and bottom of cursor position 1234 */ 1235 first_copied_row = (vc->vc_y - new_rows/2); 1236 } 1237 old_origin += first_copied_row * old_row_size; 1238 } else 1239 first_copied_row = 0; 1240 end = old_origin + old_row_size * min(old_rows, new_rows); 1241 1242 vc_uniscr_copy_area(new_uniscr, new_cols, new_rows, 1243 get_vc_uniscr(vc), rlth/2, first_copied_row, 1244 min(old_rows, new_rows)); 1245 vc_uniscr_set(vc, new_uniscr); 1246 1247 update_attr(vc); 1248 1249 while (old_origin < end) { 1250 scr_memcpyw((unsigned short *) new_origin, 1251 (unsigned short *) old_origin, rlth); 1252 if (rrem) 1253 scr_memsetw((void *)(new_origin + rlth), 1254 vc->vc_video_erase_char, rrem); 1255 old_origin += old_row_size; 1256 new_origin += new_row_size; 1257 } 1258 if (new_scr_end > new_origin) 1259 scr_memsetw((void *)new_origin, vc->vc_video_erase_char, 1260 new_scr_end - new_origin); 1261 kfree(vc->vc_screenbuf); 1262 vc->vc_screenbuf = newscreen; 1263 vc->vc_screenbuf_size = new_screen_size; 1264 set_origin(vc); 1265 1266 /* do part of a reset_terminal() */ 1267 vc->vc_top = 0; 1268 vc->vc_bottom = vc->vc_rows; 1269 gotoxy(vc, vc->vc_x, vc->vc_y); 1270 save_cur(vc); 1271 1272 if (tty) { 1273 /* Rewrite the requested winsize data with the actual 1274 resulting sizes */ 1275 struct winsize ws; 1276 memset(&ws, 0, sizeof(ws)); 1277 ws.ws_row = vc->vc_rows; 1278 ws.ws_col = vc->vc_cols; 1279 ws.ws_ypixel = vc->vc_scan_lines; 1280 tty_do_resize(tty, &ws); 1281 } 1282 1283 if (con_is_visible(vc)) 1284 update_screen(vc); 1285 vt_event_post(VT_EVENT_RESIZE, vc->vc_num, vc->vc_num); 1286 notify_update(vc); 1287 return err; 1288 } 1289 1290 /** 1291 * vc_resize - resize a VT 1292 * @vc: virtual console 1293 * @cols: columns 1294 * @rows: rows 1295 * 1296 * Resize a virtual console as seen from the console end of things. We 1297 * use the common vc_do_resize methods to update the structures. The 1298 * caller must hold the console sem to protect console internals and 1299 * vc->port.tty 1300 */ 1301 1302 int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int rows) 1303 { 1304 return vc_do_resize(vc->port.tty, vc, cols, rows); 1305 } 1306 1307 /** 1308 * vt_resize - resize a VT 1309 * @tty: tty to resize 1310 * @ws: winsize attributes 1311 * 1312 * Resize a virtual terminal. This is called by the tty layer as we 1313 * register our own handler for resizing. The mutual helper does all 1314 * the actual work. 1315 * 1316 * Takes the console sem and the called methods then take the tty 1317 * termios_rwsem and the tty ctrl_lock in that order. 1318 */ 1319 static int vt_resize(struct tty_struct *tty, struct winsize *ws) 1320 { 1321 struct vc_data *vc = tty->driver_data; 1322 int ret; 1323 1324 console_lock(); 1325 ret = vc_do_resize(tty, vc, ws->ws_col, ws->ws_row); 1326 console_unlock(); 1327 return ret; 1328 } 1329 1330 struct vc_data *vc_deallocate(unsigned int currcons) 1331 { 1332 struct vc_data *vc = NULL; 1333 1334 WARN_CONSOLE_UNLOCKED(); 1335 1336 if (vc_cons_allocated(currcons)) { 1337 struct vt_notifier_param param; 1338 1339 param.vc = vc = vc_cons[currcons].d; 1340 atomic_notifier_call_chain(&vt_notifier_list, VT_DEALLOCATE, ¶m); 1341 vcs_remove_sysfs(currcons); 1342 visual_deinit(vc); 1343 put_pid(vc->vt_pid); 1344 vc_uniscr_set(vc, NULL); 1345 kfree(vc->vc_screenbuf); 1346 vc_cons[currcons].d = NULL; 1347 } 1348 return vc; 1349 } 1350 1351 /* 1352 * VT102 emulator 1353 */ 1354 1355 enum { EPecma = 0, EPdec, EPeq, EPgt, EPlt}; 1356 1357 #define set_kbd(vc, x) vt_set_kbd_mode_bit((vc)->vc_num, (x)) 1358 #define clr_kbd(vc, x) vt_clr_kbd_mode_bit((vc)->vc_num, (x)) 1359 #define is_kbd(vc, x) vt_get_kbd_mode_bit((vc)->vc_num, (x)) 1360 1361 #define decarm VC_REPEAT 1362 #define decckm VC_CKMODE 1363 #define kbdapplic VC_APPLIC 1364 #define lnm VC_CRLF 1365 1366 /* 1367 * this is what the terminal answers to a ESC-Z or csi0c query. 1368 */ 1369 #define VT100ID "\033[?1;2c" 1370 #define VT102ID "\033[?6c" 1371 1372 const unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7, 1373 8,12,10,14, 9,13,11,15 }; 1374 1375 /* the default colour table, for VGA+ colour systems */ 1376 unsigned char default_red[] = { 1377 0x00, 0xaa, 0x00, 0xaa, 0x00, 0xaa, 0x00, 0xaa, 1378 0x55, 0xff, 0x55, 0xff, 0x55, 0xff, 0x55, 0xff 1379 }; 1380 module_param_array(default_red, byte, NULL, S_IRUGO | S_IWUSR); 1381 1382 unsigned char default_grn[] = { 1383 0x00, 0x00, 0xaa, 0x55, 0x00, 0x00, 0xaa, 0xaa, 1384 0x55, 0x55, 0xff, 0xff, 0x55, 0x55, 0xff, 0xff 1385 }; 1386 module_param_array(default_grn, byte, NULL, S_IRUGO | S_IWUSR); 1387 1388 unsigned char default_blu[] = { 1389 0x00, 0x00, 0x00, 0x00, 0xaa, 0xaa, 0xaa, 0xaa, 1390 0x55, 0x55, 0x55, 0x55, 0xff, 0xff, 0xff, 0xff 1391 }; 1392 module_param_array(default_blu, byte, NULL, S_IRUGO | S_IWUSR); 1393 1394 /* 1395 * gotoxy() must verify all boundaries, because the arguments 1396 * might also be negative. If the given position is out of 1397 * bounds, the cursor is placed at the nearest margin. 1398 */ 1399 static void gotoxy(struct vc_data *vc, int new_x, int new_y) 1400 { 1401 int min_y, max_y; 1402 1403 if (new_x < 0) 1404 vc->vc_x = 0; 1405 else { 1406 if (new_x >= vc->vc_cols) 1407 vc->vc_x = vc->vc_cols - 1; 1408 else 1409 vc->vc_x = new_x; 1410 } 1411 1412 if (vc->vc_decom) { 1413 min_y = vc->vc_top; 1414 max_y = vc->vc_bottom; 1415 } else { 1416 min_y = 0; 1417 max_y = vc->vc_rows; 1418 } 1419 if (new_y < min_y) 1420 vc->vc_y = min_y; 1421 else if (new_y >= max_y) 1422 vc->vc_y = max_y - 1; 1423 else 1424 vc->vc_y = new_y; 1425 vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1); 1426 vc->vc_need_wrap = 0; 1427 } 1428 1429 /* for absolute user moves, when decom is set */ 1430 static void gotoxay(struct vc_data *vc, int new_x, int new_y) 1431 { 1432 gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y); 1433 } 1434 1435 void scrollback(struct vc_data *vc) 1436 { 1437 scrolldelta(-(vc->vc_rows / 2)); 1438 } 1439 1440 void scrollfront(struct vc_data *vc, int lines) 1441 { 1442 if (!lines) 1443 lines = vc->vc_rows / 2; 1444 scrolldelta(lines); 1445 } 1446 1447 static void lf(struct vc_data *vc) 1448 { 1449 /* don't scroll if above bottom of scrolling region, or 1450 * if below scrolling region 1451 */ 1452 if (vc->vc_y + 1 == vc->vc_bottom) 1453 con_scroll(vc, vc->vc_top, vc->vc_bottom, SM_UP, 1); 1454 else if (vc->vc_y < vc->vc_rows - 1) { 1455 vc->vc_y++; 1456 vc->vc_pos += vc->vc_size_row; 1457 } 1458 vc->vc_need_wrap = 0; 1459 notify_write(vc, '\n'); 1460 } 1461 1462 static void ri(struct vc_data *vc) 1463 { 1464 /* don't scroll if below top of scrolling region, or 1465 * if above scrolling region 1466 */ 1467 if (vc->vc_y == vc->vc_top) 1468 con_scroll(vc, vc->vc_top, vc->vc_bottom, SM_DOWN, 1); 1469 else if (vc->vc_y > 0) { 1470 vc->vc_y--; 1471 vc->vc_pos -= vc->vc_size_row; 1472 } 1473 vc->vc_need_wrap = 0; 1474 } 1475 1476 static inline void cr(struct vc_data *vc) 1477 { 1478 vc->vc_pos -= vc->vc_x << 1; 1479 vc->vc_need_wrap = vc->vc_x = 0; 1480 notify_write(vc, '\r'); 1481 } 1482 1483 static inline void bs(struct vc_data *vc) 1484 { 1485 if (vc->vc_x) { 1486 vc->vc_pos -= 2; 1487 vc->vc_x--; 1488 vc->vc_need_wrap = 0; 1489 notify_write(vc, '\b'); 1490 } 1491 } 1492 1493 static inline void del(struct vc_data *vc) 1494 { 1495 /* ignored */ 1496 } 1497 1498 static void csi_J(struct vc_data *vc, int vpar) 1499 { 1500 unsigned int count; 1501 unsigned short * start; 1502 1503 switch (vpar) { 1504 case 0: /* erase from cursor to end of display */ 1505 vc_uniscr_clear_line(vc, vc->vc_x, 1506 vc->vc_cols - vc->vc_x); 1507 vc_uniscr_clear_lines(vc, vc->vc_y + 1, 1508 vc->vc_rows - vc->vc_y - 1); 1509 count = (vc->vc_scr_end - vc->vc_pos) >> 1; 1510 start = (unsigned short *)vc->vc_pos; 1511 break; 1512 case 1: /* erase from start to cursor */ 1513 vc_uniscr_clear_line(vc, 0, vc->vc_x + 1); 1514 vc_uniscr_clear_lines(vc, 0, vc->vc_y); 1515 count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1; 1516 start = (unsigned short *)vc->vc_origin; 1517 break; 1518 case 3: /* include scrollback */ 1519 flush_scrollback(vc); 1520 /* fallthrough */ 1521 case 2: /* erase whole display */ 1522 vc_uniscr_clear_lines(vc, 0, vc->vc_rows); 1523 count = vc->vc_cols * vc->vc_rows; 1524 start = (unsigned short *)vc->vc_origin; 1525 break; 1526 default: 1527 return; 1528 } 1529 scr_memsetw(start, vc->vc_video_erase_char, 2 * count); 1530 if (con_should_update(vc)) 1531 do_update_region(vc, (unsigned long) start, count); 1532 vc->vc_need_wrap = 0; 1533 } 1534 1535 static void csi_K(struct vc_data *vc, int vpar) 1536 { 1537 unsigned int count; 1538 unsigned short *start = (unsigned short *)vc->vc_pos; 1539 int offset; 1540 1541 switch (vpar) { 1542 case 0: /* erase from cursor to end of line */ 1543 offset = 0; 1544 count = vc->vc_cols - vc->vc_x; 1545 break; 1546 case 1: /* erase from start of line to cursor */ 1547 offset = -vc->vc_x; 1548 count = vc->vc_x + 1; 1549 break; 1550 case 2: /* erase whole line */ 1551 offset = -vc->vc_x; 1552 count = vc->vc_cols; 1553 break; 1554 default: 1555 return; 1556 } 1557 vc_uniscr_clear_line(vc, vc->vc_x + offset, count); 1558 scr_memsetw(start + offset, vc->vc_video_erase_char, 2 * count); 1559 vc->vc_need_wrap = 0; 1560 if (con_should_update(vc)) 1561 do_update_region(vc, (unsigned long)(start + offset), count); 1562 } 1563 1564 static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */ 1565 { /* not vt100? */ 1566 int count; 1567 1568 if (!vpar) 1569 vpar++; 1570 count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar; 1571 1572 vc_uniscr_clear_line(vc, vc->vc_x, count); 1573 scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count); 1574 if (con_should_update(vc)) 1575 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count); 1576 vc->vc_need_wrap = 0; 1577 } 1578 1579 static void default_attr(struct vc_data *vc) 1580 { 1581 vc->vc_intensity = 1; 1582 vc->vc_italic = 0; 1583 vc->vc_underline = 0; 1584 vc->vc_reverse = 0; 1585 vc->vc_blink = 0; 1586 vc->vc_color = vc->vc_def_color; 1587 } 1588 1589 struct rgb { u8 r; u8 g; u8 b; }; 1590 1591 static void rgb_from_256(int i, struct rgb *c) 1592 { 1593 if (i < 8) { /* Standard colours. */ 1594 c->r = i&1 ? 0xaa : 0x00; 1595 c->g = i&2 ? 0xaa : 0x00; 1596 c->b = i&4 ? 0xaa : 0x00; 1597 } else if (i < 16) { 1598 c->r = i&1 ? 0xff : 0x55; 1599 c->g = i&2 ? 0xff : 0x55; 1600 c->b = i&4 ? 0xff : 0x55; 1601 } else if (i < 232) { /* 6x6x6 colour cube. */ 1602 c->r = (i - 16) / 36 * 85 / 2; 1603 c->g = (i - 16) / 6 % 6 * 85 / 2; 1604 c->b = (i - 16) % 6 * 85 / 2; 1605 } else /* Grayscale ramp. */ 1606 c->r = c->g = c->b = i * 10 - 2312; 1607 } 1608 1609 static void rgb_foreground(struct vc_data *vc, const struct rgb *c) 1610 { 1611 u8 hue = 0, max = max3(c->r, c->g, c->b); 1612 1613 if (c->r > max / 2) 1614 hue |= 4; 1615 if (c->g > max / 2) 1616 hue |= 2; 1617 if (c->b > max / 2) 1618 hue |= 1; 1619 1620 if (hue == 7 && max <= 0x55) { 1621 hue = 0; 1622 vc->vc_intensity = 2; 1623 } else if (max > 0xaa) 1624 vc->vc_intensity = 2; 1625 else 1626 vc->vc_intensity = 1; 1627 1628 vc->vc_color = (vc->vc_color & 0xf0) | hue; 1629 } 1630 1631 static void rgb_background(struct vc_data *vc, const struct rgb *c) 1632 { 1633 /* For backgrounds, err on the dark side. */ 1634 vc->vc_color = (vc->vc_color & 0x0f) 1635 | (c->r&0x80) >> 1 | (c->g&0x80) >> 2 | (c->b&0x80) >> 3; 1636 } 1637 1638 /* 1639 * ITU T.416 Higher colour modes. They break the usual properties of SGR codes 1640 * and thus need to be detected and ignored by hand. That standard also 1641 * wants : rather than ; as separators but sequences containing : are currently 1642 * completely ignored by the parser. 1643 * 1644 * Subcommands 3 (CMY) and 4 (CMYK) are so insane there's no point in 1645 * supporting them. 1646 */ 1647 static int vc_t416_color(struct vc_data *vc, int i, 1648 void(*set_color)(struct vc_data *vc, const struct rgb *c)) 1649 { 1650 struct rgb c; 1651 1652 i++; 1653 if (i > vc->vc_npar) 1654 return i; 1655 1656 if (vc->vc_par[i] == 5 && i + 1 <= vc->vc_npar) { 1657 /* 256 colours */ 1658 i++; 1659 rgb_from_256(vc->vc_par[i], &c); 1660 } else if (vc->vc_par[i] == 2 && i + 3 <= vc->vc_npar) { 1661 /* 24 bit */ 1662 c.r = vc->vc_par[i + 1]; 1663 c.g = vc->vc_par[i + 2]; 1664 c.b = vc->vc_par[i + 3]; 1665 i += 3; 1666 } else 1667 return i; 1668 1669 set_color(vc, &c); 1670 1671 return i; 1672 } 1673 1674 /* console_lock is held */ 1675 static void csi_m(struct vc_data *vc) 1676 { 1677 int i; 1678 1679 for (i = 0; i <= vc->vc_npar; i++) 1680 switch (vc->vc_par[i]) { 1681 case 0: /* all attributes off */ 1682 default_attr(vc); 1683 break; 1684 case 1: 1685 vc->vc_intensity = 2; 1686 break; 1687 case 2: 1688 vc->vc_intensity = 0; 1689 break; 1690 case 3: 1691 vc->vc_italic = 1; 1692 break; 1693 case 21: 1694 /* 1695 * No console drivers support double underline, so 1696 * convert it to a single underline. 1697 */ 1698 case 4: 1699 vc->vc_underline = 1; 1700 break; 1701 case 5: 1702 vc->vc_blink = 1; 1703 break; 1704 case 7: 1705 vc->vc_reverse = 1; 1706 break; 1707 case 10: /* ANSI X3.64-1979 (SCO-ish?) 1708 * Select primary font, don't display control chars if 1709 * defined, don't set bit 8 on output. 1710 */ 1711 vc->vc_translate = set_translate(vc->vc_charset == 0 1712 ? vc->vc_G0_charset 1713 : vc->vc_G1_charset, vc); 1714 vc->vc_disp_ctrl = 0; 1715 vc->vc_toggle_meta = 0; 1716 break; 1717 case 11: /* ANSI X3.64-1979 (SCO-ish?) 1718 * Select first alternate font, lets chars < 32 be 1719 * displayed as ROM chars. 1720 */ 1721 vc->vc_translate = set_translate(IBMPC_MAP, vc); 1722 vc->vc_disp_ctrl = 1; 1723 vc->vc_toggle_meta = 0; 1724 break; 1725 case 12: /* ANSI X3.64-1979 (SCO-ish?) 1726 * Select second alternate font, toggle high bit 1727 * before displaying as ROM char. 1728 */ 1729 vc->vc_translate = set_translate(IBMPC_MAP, vc); 1730 vc->vc_disp_ctrl = 1; 1731 vc->vc_toggle_meta = 1; 1732 break; 1733 case 22: 1734 vc->vc_intensity = 1; 1735 break; 1736 case 23: 1737 vc->vc_italic = 0; 1738 break; 1739 case 24: 1740 vc->vc_underline = 0; 1741 break; 1742 case 25: 1743 vc->vc_blink = 0; 1744 break; 1745 case 27: 1746 vc->vc_reverse = 0; 1747 break; 1748 case 38: 1749 i = vc_t416_color(vc, i, rgb_foreground); 1750 break; 1751 case 48: 1752 i = vc_t416_color(vc, i, rgb_background); 1753 break; 1754 case 39: 1755 vc->vc_color = (vc->vc_def_color & 0x0f) | 1756 (vc->vc_color & 0xf0); 1757 break; 1758 case 49: 1759 vc->vc_color = (vc->vc_def_color & 0xf0) | 1760 (vc->vc_color & 0x0f); 1761 break; 1762 default: 1763 if (vc->vc_par[i] >= 90 && vc->vc_par[i] <= 107) { 1764 if (vc->vc_par[i] < 100) 1765 vc->vc_intensity = 2; 1766 vc->vc_par[i] -= 60; 1767 } 1768 if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37) 1769 vc->vc_color = color_table[vc->vc_par[i] - 30] 1770 | (vc->vc_color & 0xf0); 1771 else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47) 1772 vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4) 1773 | (vc->vc_color & 0x0f); 1774 break; 1775 } 1776 update_attr(vc); 1777 } 1778 1779 static void respond_string(const char *p, struct tty_port *port) 1780 { 1781 while (*p) { 1782 tty_insert_flip_char(port, *p, 0); 1783 p++; 1784 } 1785 tty_schedule_flip(port); 1786 } 1787 1788 static void cursor_report(struct vc_data *vc, struct tty_struct *tty) 1789 { 1790 char buf[40]; 1791 1792 sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1); 1793 respond_string(buf, tty->port); 1794 } 1795 1796 static inline void status_report(struct tty_struct *tty) 1797 { 1798 respond_string("\033[0n", tty->port); /* Terminal ok */ 1799 } 1800 1801 static inline void respond_ID(struct tty_struct *tty) 1802 { 1803 respond_string(VT102ID, tty->port); 1804 } 1805 1806 void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry) 1807 { 1808 char buf[8]; 1809 1810 sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx), 1811 (char)('!' + mry)); 1812 respond_string(buf, tty->port); 1813 } 1814 1815 /* invoked via ioctl(TIOCLINUX) and through set_selection_user */ 1816 int mouse_reporting(void) 1817 { 1818 return vc_cons[fg_console].d->vc_report_mouse; 1819 } 1820 1821 /* console_lock is held */ 1822 static void set_mode(struct vc_data *vc, int on_off) 1823 { 1824 int i; 1825 1826 for (i = 0; i <= vc->vc_npar; i++) 1827 if (vc->vc_priv == EPdec) { 1828 switch(vc->vc_par[i]) { /* DEC private modes set/reset */ 1829 case 1: /* Cursor keys send ^[Ox/^[[x */ 1830 if (on_off) 1831 set_kbd(vc, decckm); 1832 else 1833 clr_kbd(vc, decckm); 1834 break; 1835 case 3: /* 80/132 mode switch unimplemented */ 1836 #if 0 1837 vc_resize(deccolm ? 132 : 80, vc->vc_rows); 1838 /* this alone does not suffice; some user mode 1839 utility has to change the hardware regs */ 1840 #endif 1841 break; 1842 case 5: /* Inverted screen on/off */ 1843 if (vc->vc_decscnm != on_off) { 1844 vc->vc_decscnm = on_off; 1845 invert_screen(vc, 0, vc->vc_screenbuf_size, 0); 1846 update_attr(vc); 1847 } 1848 break; 1849 case 6: /* Origin relative/absolute */ 1850 vc->vc_decom = on_off; 1851 gotoxay(vc, 0, 0); 1852 break; 1853 case 7: /* Autowrap on/off */ 1854 vc->vc_decawm = on_off; 1855 break; 1856 case 8: /* Autorepeat on/off */ 1857 if (on_off) 1858 set_kbd(vc, decarm); 1859 else 1860 clr_kbd(vc, decarm); 1861 break; 1862 case 9: 1863 vc->vc_report_mouse = on_off ? 1 : 0; 1864 break; 1865 case 25: /* Cursor on/off */ 1866 vc->vc_deccm = on_off; 1867 break; 1868 case 1000: 1869 vc->vc_report_mouse = on_off ? 2 : 0; 1870 break; 1871 } 1872 } else { 1873 switch(vc->vc_par[i]) { /* ANSI modes set/reset */ 1874 case 3: /* Monitor (display ctrls) */ 1875 vc->vc_disp_ctrl = on_off; 1876 break; 1877 case 4: /* Insert Mode on/off */ 1878 vc->vc_decim = on_off; 1879 break; 1880 case 20: /* Lf, Enter == CrLf/Lf */ 1881 if (on_off) 1882 set_kbd(vc, lnm); 1883 else 1884 clr_kbd(vc, lnm); 1885 break; 1886 } 1887 } 1888 } 1889 1890 /* console_lock is held */ 1891 static void setterm_command(struct vc_data *vc) 1892 { 1893 switch(vc->vc_par[0]) { 1894 case 1: /* set color for underline mode */ 1895 if (vc->vc_can_do_color && 1896 vc->vc_par[1] < 16) { 1897 vc->vc_ulcolor = color_table[vc->vc_par[1]]; 1898 if (vc->vc_underline) 1899 update_attr(vc); 1900 } 1901 break; 1902 case 2: /* set color for half intensity mode */ 1903 if (vc->vc_can_do_color && 1904 vc->vc_par[1] < 16) { 1905 vc->vc_halfcolor = color_table[vc->vc_par[1]]; 1906 if (vc->vc_intensity == 0) 1907 update_attr(vc); 1908 } 1909 break; 1910 case 8: /* store colors as defaults */ 1911 vc->vc_def_color = vc->vc_attr; 1912 if (vc->vc_hi_font_mask == 0x100) 1913 vc->vc_def_color >>= 1; 1914 default_attr(vc); 1915 update_attr(vc); 1916 break; 1917 case 9: /* set blanking interval */ 1918 blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60; 1919 poke_blanked_console(); 1920 break; 1921 case 10: /* set bell frequency in Hz */ 1922 if (vc->vc_npar >= 1) 1923 vc->vc_bell_pitch = vc->vc_par[1]; 1924 else 1925 vc->vc_bell_pitch = DEFAULT_BELL_PITCH; 1926 break; 1927 case 11: /* set bell duration in msec */ 1928 if (vc->vc_npar >= 1) 1929 vc->vc_bell_duration = (vc->vc_par[1] < 2000) ? 1930 msecs_to_jiffies(vc->vc_par[1]) : 0; 1931 else 1932 vc->vc_bell_duration = DEFAULT_BELL_DURATION; 1933 break; 1934 case 12: /* bring specified console to the front */ 1935 if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1)) 1936 set_console(vc->vc_par[1] - 1); 1937 break; 1938 case 13: /* unblank the screen */ 1939 poke_blanked_console(); 1940 break; 1941 case 14: /* set vesa powerdown interval */ 1942 vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ; 1943 break; 1944 case 15: /* activate the previous console */ 1945 set_console(last_console); 1946 break; 1947 case 16: /* set cursor blink duration in msec */ 1948 if (vc->vc_npar >= 1 && vc->vc_par[1] >= 50 && 1949 vc->vc_par[1] <= USHRT_MAX) 1950 vc->vc_cur_blink_ms = vc->vc_par[1]; 1951 else 1952 vc->vc_cur_blink_ms = DEFAULT_CURSOR_BLINK_MS; 1953 break; 1954 } 1955 } 1956 1957 /* console_lock is held */ 1958 static void csi_at(struct vc_data *vc, unsigned int nr) 1959 { 1960 if (nr > vc->vc_cols - vc->vc_x) 1961 nr = vc->vc_cols - vc->vc_x; 1962 else if (!nr) 1963 nr = 1; 1964 insert_char(vc, nr); 1965 } 1966 1967 /* console_lock is held */ 1968 static void csi_L(struct vc_data *vc, unsigned int nr) 1969 { 1970 if (nr > vc->vc_rows - vc->vc_y) 1971 nr = vc->vc_rows - vc->vc_y; 1972 else if (!nr) 1973 nr = 1; 1974 con_scroll(vc, vc->vc_y, vc->vc_bottom, SM_DOWN, nr); 1975 vc->vc_need_wrap = 0; 1976 } 1977 1978 /* console_lock is held */ 1979 static void csi_P(struct vc_data *vc, unsigned int nr) 1980 { 1981 if (nr > vc->vc_cols - vc->vc_x) 1982 nr = vc->vc_cols - vc->vc_x; 1983 else if (!nr) 1984 nr = 1; 1985 delete_char(vc, nr); 1986 } 1987 1988 /* console_lock is held */ 1989 static void csi_M(struct vc_data *vc, unsigned int nr) 1990 { 1991 if (nr > vc->vc_rows - vc->vc_y) 1992 nr = vc->vc_rows - vc->vc_y; 1993 else if (!nr) 1994 nr=1; 1995 con_scroll(vc, vc->vc_y, vc->vc_bottom, SM_UP, nr); 1996 vc->vc_need_wrap = 0; 1997 } 1998 1999 /* console_lock is held (except via vc_init->reset_terminal */ 2000 static void save_cur(struct vc_data *vc) 2001 { 2002 vc->vc_saved_x = vc->vc_x; 2003 vc->vc_saved_y = vc->vc_y; 2004 vc->vc_s_intensity = vc->vc_intensity; 2005 vc->vc_s_italic = vc->vc_italic; 2006 vc->vc_s_underline = vc->vc_underline; 2007 vc->vc_s_blink = vc->vc_blink; 2008 vc->vc_s_reverse = vc->vc_reverse; 2009 vc->vc_s_charset = vc->vc_charset; 2010 vc->vc_s_color = vc->vc_color; 2011 vc->vc_saved_G0 = vc->vc_G0_charset; 2012 vc->vc_saved_G1 = vc->vc_G1_charset; 2013 } 2014 2015 /* console_lock is held */ 2016 static void restore_cur(struct vc_data *vc) 2017 { 2018 gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y); 2019 vc->vc_intensity = vc->vc_s_intensity; 2020 vc->vc_italic = vc->vc_s_italic; 2021 vc->vc_underline = vc->vc_s_underline; 2022 vc->vc_blink = vc->vc_s_blink; 2023 vc->vc_reverse = vc->vc_s_reverse; 2024 vc->vc_charset = vc->vc_s_charset; 2025 vc->vc_color = vc->vc_s_color; 2026 vc->vc_G0_charset = vc->vc_saved_G0; 2027 vc->vc_G1_charset = vc->vc_saved_G1; 2028 vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc); 2029 update_attr(vc); 2030 vc->vc_need_wrap = 0; 2031 } 2032 2033 enum { ESnormal, ESesc, ESsquare, ESgetpars, ESfunckey, 2034 EShash, ESsetG0, ESsetG1, ESpercent, EScsiignore, ESnonstd, 2035 ESpalette, ESosc }; 2036 2037 /* console_lock is held (except via vc_init()) */ 2038 static void reset_terminal(struct vc_data *vc, int do_clear) 2039 { 2040 vc->vc_top = 0; 2041 vc->vc_bottom = vc->vc_rows; 2042 vc->vc_state = ESnormal; 2043 vc->vc_priv = EPecma; 2044 vc->vc_translate = set_translate(LAT1_MAP, vc); 2045 vc->vc_G0_charset = LAT1_MAP; 2046 vc->vc_G1_charset = GRAF_MAP; 2047 vc->vc_charset = 0; 2048 vc->vc_need_wrap = 0; 2049 vc->vc_report_mouse = 0; 2050 vc->vc_utf = default_utf8; 2051 vc->vc_utf_count = 0; 2052 2053 vc->vc_disp_ctrl = 0; 2054 vc->vc_toggle_meta = 0; 2055 2056 vc->vc_decscnm = 0; 2057 vc->vc_decom = 0; 2058 vc->vc_decawm = 1; 2059 vc->vc_deccm = global_cursor_default; 2060 vc->vc_decim = 0; 2061 2062 vt_reset_keyboard(vc->vc_num); 2063 2064 vc->vc_cursor_type = cur_default; 2065 vc->vc_complement_mask = vc->vc_s_complement_mask; 2066 2067 default_attr(vc); 2068 update_attr(vc); 2069 2070 vc->vc_tab_stop[0] = 2071 vc->vc_tab_stop[1] = 2072 vc->vc_tab_stop[2] = 2073 vc->vc_tab_stop[3] = 2074 vc->vc_tab_stop[4] = 2075 vc->vc_tab_stop[5] = 2076 vc->vc_tab_stop[6] = 2077 vc->vc_tab_stop[7] = 0x01010101; 2078 2079 vc->vc_bell_pitch = DEFAULT_BELL_PITCH; 2080 vc->vc_bell_duration = DEFAULT_BELL_DURATION; 2081 vc->vc_cur_blink_ms = DEFAULT_CURSOR_BLINK_MS; 2082 2083 gotoxy(vc, 0, 0); 2084 save_cur(vc); 2085 if (do_clear) 2086 csi_J(vc, 2); 2087 } 2088 2089 /* console_lock is held */ 2090 static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c) 2091 { 2092 /* 2093 * Control characters can be used in the _middle_ 2094 * of an escape sequence. 2095 */ 2096 if (vc->vc_state == ESosc && c>=8 && c<=13) /* ... except for OSC */ 2097 return; 2098 switch (c) { 2099 case 0: 2100 return; 2101 case 7: 2102 if (vc->vc_state == ESosc) 2103 vc->vc_state = ESnormal; 2104 else if (vc->vc_bell_duration) 2105 kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration); 2106 return; 2107 case 8: 2108 bs(vc); 2109 return; 2110 case 9: 2111 vc->vc_pos -= (vc->vc_x << 1); 2112 while (vc->vc_x < vc->vc_cols - 1) { 2113 vc->vc_x++; 2114 if (vc->vc_tab_stop[7 & (vc->vc_x >> 5)] & (1 << (vc->vc_x & 31))) 2115 break; 2116 } 2117 vc->vc_pos += (vc->vc_x << 1); 2118 notify_write(vc, '\t'); 2119 return; 2120 case 10: case 11: case 12: 2121 lf(vc); 2122 if (!is_kbd(vc, lnm)) 2123 return; 2124 /* fall through */ 2125 case 13: 2126 cr(vc); 2127 return; 2128 case 14: 2129 vc->vc_charset = 1; 2130 vc->vc_translate = set_translate(vc->vc_G1_charset, vc); 2131 vc->vc_disp_ctrl = 1; 2132 return; 2133 case 15: 2134 vc->vc_charset = 0; 2135 vc->vc_translate = set_translate(vc->vc_G0_charset, vc); 2136 vc->vc_disp_ctrl = 0; 2137 return; 2138 case 24: case 26: 2139 vc->vc_state = ESnormal; 2140 return; 2141 case 27: 2142 vc->vc_state = ESesc; 2143 return; 2144 case 127: 2145 del(vc); 2146 return; 2147 case 128+27: 2148 vc->vc_state = ESsquare; 2149 return; 2150 } 2151 switch(vc->vc_state) { 2152 case ESesc: 2153 vc->vc_state = ESnormal; 2154 switch (c) { 2155 case '[': 2156 vc->vc_state = ESsquare; 2157 return; 2158 case ']': 2159 vc->vc_state = ESnonstd; 2160 return; 2161 case '%': 2162 vc->vc_state = ESpercent; 2163 return; 2164 case 'E': 2165 cr(vc); 2166 lf(vc); 2167 return; 2168 case 'M': 2169 ri(vc); 2170 return; 2171 case 'D': 2172 lf(vc); 2173 return; 2174 case 'H': 2175 vc->vc_tab_stop[7 & (vc->vc_x >> 5)] |= (1 << (vc->vc_x & 31)); 2176 return; 2177 case 'Z': 2178 respond_ID(tty); 2179 return; 2180 case '7': 2181 save_cur(vc); 2182 return; 2183 case '8': 2184 restore_cur(vc); 2185 return; 2186 case '(': 2187 vc->vc_state = ESsetG0; 2188 return; 2189 case ')': 2190 vc->vc_state = ESsetG1; 2191 return; 2192 case '#': 2193 vc->vc_state = EShash; 2194 return; 2195 case 'c': 2196 reset_terminal(vc, 1); 2197 return; 2198 case '>': /* Numeric keypad */ 2199 clr_kbd(vc, kbdapplic); 2200 return; 2201 case '=': /* Appl. keypad */ 2202 set_kbd(vc, kbdapplic); 2203 return; 2204 } 2205 return; 2206 case ESnonstd: 2207 if (c=='P') { /* palette escape sequence */ 2208 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++) 2209 vc->vc_par[vc->vc_npar] = 0; 2210 vc->vc_npar = 0; 2211 vc->vc_state = ESpalette; 2212 return; 2213 } else if (c=='R') { /* reset palette */ 2214 reset_palette(vc); 2215 vc->vc_state = ESnormal; 2216 } else if (c>='0' && c<='9') 2217 vc->vc_state = ESosc; 2218 else 2219 vc->vc_state = ESnormal; 2220 return; 2221 case ESpalette: 2222 if (isxdigit(c)) { 2223 vc->vc_par[vc->vc_npar++] = hex_to_bin(c); 2224 if (vc->vc_npar == 7) { 2225 int i = vc->vc_par[0] * 3, j = 1; 2226 vc->vc_palette[i] = 16 * vc->vc_par[j++]; 2227 vc->vc_palette[i++] += vc->vc_par[j++]; 2228 vc->vc_palette[i] = 16 * vc->vc_par[j++]; 2229 vc->vc_palette[i++] += vc->vc_par[j++]; 2230 vc->vc_palette[i] = 16 * vc->vc_par[j++]; 2231 vc->vc_palette[i] += vc->vc_par[j]; 2232 set_palette(vc); 2233 vc->vc_state = ESnormal; 2234 } 2235 } else 2236 vc->vc_state = ESnormal; 2237 return; 2238 case ESsquare: 2239 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++) 2240 vc->vc_par[vc->vc_npar] = 0; 2241 vc->vc_npar = 0; 2242 vc->vc_state = ESgetpars; 2243 if (c == '[') { /* Function key */ 2244 vc->vc_state=ESfunckey; 2245 return; 2246 } 2247 switch (c) { 2248 case '?': 2249 vc->vc_priv = EPdec; 2250 return; 2251 case '>': 2252 vc->vc_priv = EPgt; 2253 return; 2254 case '=': 2255 vc->vc_priv = EPeq; 2256 return; 2257 case '<': 2258 vc->vc_priv = EPlt; 2259 return; 2260 } 2261 vc->vc_priv = EPecma; 2262 /* fall through */ 2263 case ESgetpars: 2264 if (c == ';' && vc->vc_npar < NPAR - 1) { 2265 vc->vc_npar++; 2266 return; 2267 } else if (c>='0' && c<='9') { 2268 vc->vc_par[vc->vc_npar] *= 10; 2269 vc->vc_par[vc->vc_npar] += c - '0'; 2270 return; 2271 } 2272 if (c >= 0x20 && c <= 0x3f) { /* 0x2x, 0x3a and 0x3c - 0x3f */ 2273 vc->vc_state = EScsiignore; 2274 return; 2275 } 2276 vc->vc_state = ESnormal; 2277 switch(c) { 2278 case 'h': 2279 if (vc->vc_priv <= EPdec) 2280 set_mode(vc, 1); 2281 return; 2282 case 'l': 2283 if (vc->vc_priv <= EPdec) 2284 set_mode(vc, 0); 2285 return; 2286 case 'c': 2287 if (vc->vc_priv == EPdec) { 2288 if (vc->vc_par[0]) 2289 vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16); 2290 else 2291 vc->vc_cursor_type = cur_default; 2292 return; 2293 } 2294 break; 2295 case 'm': 2296 if (vc->vc_priv == EPdec) { 2297 clear_selection(); 2298 if (vc->vc_par[0]) 2299 vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1]; 2300 else 2301 vc->vc_complement_mask = vc->vc_s_complement_mask; 2302 return; 2303 } 2304 break; 2305 case 'n': 2306 if (vc->vc_priv == EPecma) { 2307 if (vc->vc_par[0] == 5) 2308 status_report(tty); 2309 else if (vc->vc_par[0] == 6) 2310 cursor_report(vc, tty); 2311 } 2312 return; 2313 } 2314 if (vc->vc_priv != EPecma) { 2315 vc->vc_priv = EPecma; 2316 return; 2317 } 2318 switch(c) { 2319 case 'G': case '`': 2320 if (vc->vc_par[0]) 2321 vc->vc_par[0]--; 2322 gotoxy(vc, vc->vc_par[0], vc->vc_y); 2323 return; 2324 case 'A': 2325 if (!vc->vc_par[0]) 2326 vc->vc_par[0]++; 2327 gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]); 2328 return; 2329 case 'B': case 'e': 2330 if (!vc->vc_par[0]) 2331 vc->vc_par[0]++; 2332 gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]); 2333 return; 2334 case 'C': case 'a': 2335 if (!vc->vc_par[0]) 2336 vc->vc_par[0]++; 2337 gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y); 2338 return; 2339 case 'D': 2340 if (!vc->vc_par[0]) 2341 vc->vc_par[0]++; 2342 gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y); 2343 return; 2344 case 'E': 2345 if (!vc->vc_par[0]) 2346 vc->vc_par[0]++; 2347 gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]); 2348 return; 2349 case 'F': 2350 if (!vc->vc_par[0]) 2351 vc->vc_par[0]++; 2352 gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]); 2353 return; 2354 case 'd': 2355 if (vc->vc_par[0]) 2356 vc->vc_par[0]--; 2357 gotoxay(vc, vc->vc_x ,vc->vc_par[0]); 2358 return; 2359 case 'H': case 'f': 2360 if (vc->vc_par[0]) 2361 vc->vc_par[0]--; 2362 if (vc->vc_par[1]) 2363 vc->vc_par[1]--; 2364 gotoxay(vc, vc->vc_par[1], vc->vc_par[0]); 2365 return; 2366 case 'J': 2367 csi_J(vc, vc->vc_par[0]); 2368 return; 2369 case 'K': 2370 csi_K(vc, vc->vc_par[0]); 2371 return; 2372 case 'L': 2373 csi_L(vc, vc->vc_par[0]); 2374 return; 2375 case 'M': 2376 csi_M(vc, vc->vc_par[0]); 2377 return; 2378 case 'P': 2379 csi_P(vc, vc->vc_par[0]); 2380 return; 2381 case 'c': 2382 if (!vc->vc_par[0]) 2383 respond_ID(tty); 2384 return; 2385 case 'g': 2386 if (!vc->vc_par[0]) 2387 vc->vc_tab_stop[7 & (vc->vc_x >> 5)] &= ~(1 << (vc->vc_x & 31)); 2388 else if (vc->vc_par[0] == 3) { 2389 vc->vc_tab_stop[0] = 2390 vc->vc_tab_stop[1] = 2391 vc->vc_tab_stop[2] = 2392 vc->vc_tab_stop[3] = 2393 vc->vc_tab_stop[4] = 2394 vc->vc_tab_stop[5] = 2395 vc->vc_tab_stop[6] = 2396 vc->vc_tab_stop[7] = 0; 2397 } 2398 return; 2399 case 'm': 2400 csi_m(vc); 2401 return; 2402 case 'q': /* DECLL - but only 3 leds */ 2403 /* map 0,1,2,3 to 0,1,2,4 */ 2404 if (vc->vc_par[0] < 4) 2405 vt_set_led_state(vc->vc_num, 2406 (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4); 2407 return; 2408 case 'r': 2409 if (!vc->vc_par[0]) 2410 vc->vc_par[0]++; 2411 if (!vc->vc_par[1]) 2412 vc->vc_par[1] = vc->vc_rows; 2413 /* Minimum allowed region is 2 lines */ 2414 if (vc->vc_par[0] < vc->vc_par[1] && 2415 vc->vc_par[1] <= vc->vc_rows) { 2416 vc->vc_top = vc->vc_par[0] - 1; 2417 vc->vc_bottom = vc->vc_par[1]; 2418 gotoxay(vc, 0, 0); 2419 } 2420 return; 2421 case 's': 2422 save_cur(vc); 2423 return; 2424 case 'u': 2425 restore_cur(vc); 2426 return; 2427 case 'X': 2428 csi_X(vc, vc->vc_par[0]); 2429 return; 2430 case '@': 2431 csi_at(vc, vc->vc_par[0]); 2432 return; 2433 case ']': /* setterm functions */ 2434 setterm_command(vc); 2435 return; 2436 } 2437 return; 2438 case EScsiignore: 2439 if (c >= 20 && c <= 0x3f) 2440 return; 2441 vc->vc_state = ESnormal; 2442 return; 2443 case ESpercent: 2444 vc->vc_state = ESnormal; 2445 switch (c) { 2446 case '@': /* defined in ISO 2022 */ 2447 vc->vc_utf = 0; 2448 return; 2449 case 'G': /* prelim official escape code */ 2450 case '8': /* retained for compatibility */ 2451 vc->vc_utf = 1; 2452 return; 2453 } 2454 return; 2455 case ESfunckey: 2456 vc->vc_state = ESnormal; 2457 return; 2458 case EShash: 2459 vc->vc_state = ESnormal; 2460 if (c == '8') { 2461 /* DEC screen alignment test. kludge :-) */ 2462 vc->vc_video_erase_char = 2463 (vc->vc_video_erase_char & 0xff00) | 'E'; 2464 csi_J(vc, 2); 2465 vc->vc_video_erase_char = 2466 (vc->vc_video_erase_char & 0xff00) | ' '; 2467 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2); 2468 } 2469 return; 2470 case ESsetG0: 2471 if (c == '0') 2472 vc->vc_G0_charset = GRAF_MAP; 2473 else if (c == 'B') 2474 vc->vc_G0_charset = LAT1_MAP; 2475 else if (c == 'U') 2476 vc->vc_G0_charset = IBMPC_MAP; 2477 else if (c == 'K') 2478 vc->vc_G0_charset = USER_MAP; 2479 if (vc->vc_charset == 0) 2480 vc->vc_translate = set_translate(vc->vc_G0_charset, vc); 2481 vc->vc_state = ESnormal; 2482 return; 2483 case ESsetG1: 2484 if (c == '0') 2485 vc->vc_G1_charset = GRAF_MAP; 2486 else if (c == 'B') 2487 vc->vc_G1_charset = LAT1_MAP; 2488 else if (c == 'U') 2489 vc->vc_G1_charset = IBMPC_MAP; 2490 else if (c == 'K') 2491 vc->vc_G1_charset = USER_MAP; 2492 if (vc->vc_charset == 1) 2493 vc->vc_translate = set_translate(vc->vc_G1_charset, vc); 2494 vc->vc_state = ESnormal; 2495 return; 2496 case ESosc: 2497 return; 2498 default: 2499 vc->vc_state = ESnormal; 2500 } 2501 } 2502 2503 /* is_double_width() is based on the wcwidth() implementation by 2504 * Markus Kuhn -- 2007-05-26 (Unicode 5.0) 2505 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c 2506 */ 2507 struct interval { 2508 uint32_t first; 2509 uint32_t last; 2510 }; 2511 2512 static int ucs_cmp(const void *key, const void *elt) 2513 { 2514 uint32_t ucs = *(uint32_t *)key; 2515 struct interval e = *(struct interval *) elt; 2516 2517 if (ucs > e.last) 2518 return 1; 2519 else if (ucs < e.first) 2520 return -1; 2521 return 0; 2522 } 2523 2524 static int is_double_width(uint32_t ucs) 2525 { 2526 static const struct interval double_width[] = { 2527 { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E }, 2528 { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF }, 2529 { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 }, 2530 { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD } 2531 }; 2532 if (ucs < double_width[0].first || 2533 ucs > double_width[ARRAY_SIZE(double_width) - 1].last) 2534 return 0; 2535 2536 return bsearch(&ucs, double_width, ARRAY_SIZE(double_width), 2537 sizeof(struct interval), ucs_cmp) != NULL; 2538 } 2539 2540 static void con_flush(struct vc_data *vc, unsigned long draw_from, 2541 unsigned long draw_to, int *draw_x) 2542 { 2543 if (*draw_x < 0) 2544 return; 2545 2546 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, 2547 (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, *draw_x); 2548 *draw_x = -1; 2549 } 2550 2551 /* acquires console_lock */ 2552 static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count) 2553 { 2554 int c, next_c, tc, ok, n = 0, draw_x = -1; 2555 unsigned int currcons; 2556 unsigned long draw_from = 0, draw_to = 0; 2557 struct vc_data *vc; 2558 unsigned char vc_attr; 2559 struct vt_notifier_param param; 2560 uint8_t rescan; 2561 uint8_t inverse; 2562 uint8_t width; 2563 u16 himask, charmask; 2564 2565 if (in_interrupt()) 2566 return count; 2567 2568 might_sleep(); 2569 2570 console_lock(); 2571 vc = tty->driver_data; 2572 if (vc == NULL) { 2573 pr_err("vt: argh, driver_data is NULL !\n"); 2574 console_unlock(); 2575 return 0; 2576 } 2577 2578 currcons = vc->vc_num; 2579 if (!vc_cons_allocated(currcons)) { 2580 /* could this happen? */ 2581 pr_warn_once("con_write: tty %d not allocated\n", currcons+1); 2582 console_unlock(); 2583 return 0; 2584 } 2585 2586 himask = vc->vc_hi_font_mask; 2587 charmask = himask ? 0x1ff : 0xff; 2588 2589 /* undraw cursor first */ 2590 if (con_is_fg(vc)) 2591 hide_cursor(vc); 2592 2593 param.vc = vc; 2594 2595 while (!tty->stopped && count) { 2596 int orig = *buf; 2597 c = orig; 2598 buf++; 2599 n++; 2600 count--; 2601 rescan = 0; 2602 inverse = 0; 2603 width = 1; 2604 2605 /* Do no translation at all in control states */ 2606 if (vc->vc_state != ESnormal) { 2607 tc = c; 2608 } else if (vc->vc_utf && !vc->vc_disp_ctrl) { 2609 /* Combine UTF-8 into Unicode in vc_utf_char. 2610 * vc_utf_count is the number of continuation bytes still 2611 * expected to arrive. 2612 * vc_npar is the number of continuation bytes arrived so 2613 * far 2614 */ 2615 rescan_last_byte: 2616 if ((c & 0xc0) == 0x80) { 2617 /* Continuation byte received */ 2618 static const uint32_t utf8_length_changes[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff }; 2619 if (vc->vc_utf_count) { 2620 vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f); 2621 vc->vc_npar++; 2622 if (--vc->vc_utf_count) { 2623 /* Still need some bytes */ 2624 continue; 2625 } 2626 /* Got a whole character */ 2627 c = vc->vc_utf_char; 2628 /* Reject overlong sequences */ 2629 if (c <= utf8_length_changes[vc->vc_npar - 1] || 2630 c > utf8_length_changes[vc->vc_npar]) 2631 c = 0xfffd; 2632 } else { 2633 /* Unexpected continuation byte */ 2634 vc->vc_utf_count = 0; 2635 c = 0xfffd; 2636 } 2637 } else { 2638 /* Single ASCII byte or first byte of a sequence received */ 2639 if (vc->vc_utf_count) { 2640 /* Continuation byte expected */ 2641 rescan = 1; 2642 vc->vc_utf_count = 0; 2643 c = 0xfffd; 2644 } else if (c > 0x7f) { 2645 /* First byte of a multibyte sequence received */ 2646 vc->vc_npar = 0; 2647 if ((c & 0xe0) == 0xc0) { 2648 vc->vc_utf_count = 1; 2649 vc->vc_utf_char = (c & 0x1f); 2650 } else if ((c & 0xf0) == 0xe0) { 2651 vc->vc_utf_count = 2; 2652 vc->vc_utf_char = (c & 0x0f); 2653 } else if ((c & 0xf8) == 0xf0) { 2654 vc->vc_utf_count = 3; 2655 vc->vc_utf_char = (c & 0x07); 2656 } else if ((c & 0xfc) == 0xf8) { 2657 vc->vc_utf_count = 4; 2658 vc->vc_utf_char = (c & 0x03); 2659 } else if ((c & 0xfe) == 0xfc) { 2660 vc->vc_utf_count = 5; 2661 vc->vc_utf_char = (c & 0x01); 2662 } else { 2663 /* 254 and 255 are invalid */ 2664 c = 0xfffd; 2665 } 2666 if (vc->vc_utf_count) { 2667 /* Still need some bytes */ 2668 continue; 2669 } 2670 } 2671 /* Nothing to do if an ASCII byte was received */ 2672 } 2673 /* End of UTF-8 decoding. */ 2674 /* c is the received character, or U+FFFD for invalid sequences. */ 2675 /* Replace invalid Unicode code points with U+FFFD too */ 2676 if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff) 2677 c = 0xfffd; 2678 tc = c; 2679 } else { /* no utf or alternate charset mode */ 2680 tc = vc_translate(vc, c); 2681 } 2682 2683 param.c = tc; 2684 if (atomic_notifier_call_chain(&vt_notifier_list, VT_PREWRITE, 2685 ¶m) == NOTIFY_STOP) 2686 continue; 2687 2688 /* If the original code was a control character we 2689 * only allow a glyph to be displayed if the code is 2690 * not normally used (such as for cursor movement) or 2691 * if the disp_ctrl mode has been explicitly enabled. 2692 * Certain characters (as given by the CTRL_ALWAYS 2693 * bitmap) are always displayed as control characters, 2694 * as the console would be pretty useless without 2695 * them; to display an arbitrary font position use the 2696 * direct-to-font zone in UTF-8 mode. 2697 */ 2698 ok = tc && (c >= 32 || 2699 !(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 : 2700 vc->vc_utf || ((CTRL_ACTION >> c) & 1))) 2701 && (c != 127 || vc->vc_disp_ctrl) 2702 && (c != 128+27); 2703 2704 if (vc->vc_state == ESnormal && ok) { 2705 if (vc->vc_utf && !vc->vc_disp_ctrl) { 2706 if (is_double_width(c)) 2707 width = 2; 2708 } 2709 /* Now try to find out how to display it */ 2710 tc = conv_uni_to_pc(vc, tc); 2711 if (tc & ~charmask) { 2712 if (tc == -1 || tc == -2) { 2713 continue; /* nothing to display */ 2714 } 2715 /* Glyph not found */ 2716 if ((!(vc->vc_utf && !vc->vc_disp_ctrl) || c < 128) && !(c & ~charmask)) { 2717 /* In legacy mode use the glyph we get by a 1:1 mapping. 2718 This would make absolutely no sense with Unicode in mind, 2719 but do this for ASCII characters since a font may lack 2720 Unicode mapping info and we don't want to end up with 2721 having question marks only. */ 2722 tc = c; 2723 } else { 2724 /* Display U+FFFD. If it's not found, display an inverse question mark. */ 2725 tc = conv_uni_to_pc(vc, 0xfffd); 2726 if (tc < 0) { 2727 inverse = 1; 2728 tc = conv_uni_to_pc(vc, '?'); 2729 if (tc < 0) tc = '?'; 2730 } 2731 } 2732 } 2733 2734 if (!inverse) { 2735 vc_attr = vc->vc_attr; 2736 } else { 2737 /* invert vc_attr */ 2738 if (!vc->vc_can_do_color) { 2739 vc_attr = (vc->vc_attr) ^ 0x08; 2740 } else if (vc->vc_hi_font_mask == 0x100) { 2741 vc_attr = ((vc->vc_attr) & 0x11) | (((vc->vc_attr) & 0xe0) >> 4) | (((vc->vc_attr) & 0x0e) << 4); 2742 } else { 2743 vc_attr = ((vc->vc_attr) & 0x88) | (((vc->vc_attr) & 0x70) >> 4) | (((vc->vc_attr) & 0x07) << 4); 2744 } 2745 con_flush(vc, draw_from, draw_to, &draw_x); 2746 } 2747 2748 next_c = c; 2749 while (1) { 2750 if (vc->vc_need_wrap || vc->vc_decim) 2751 con_flush(vc, draw_from, draw_to, 2752 &draw_x); 2753 if (vc->vc_need_wrap) { 2754 cr(vc); 2755 lf(vc); 2756 } 2757 if (vc->vc_decim) 2758 insert_char(vc, 1); 2759 vc_uniscr_putc(vc, next_c); 2760 scr_writew(himask ? 2761 ((vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) : 2762 (vc_attr << 8) + tc, 2763 (u16 *) vc->vc_pos); 2764 if (con_should_update(vc) && draw_x < 0) { 2765 draw_x = vc->vc_x; 2766 draw_from = vc->vc_pos; 2767 } 2768 if (vc->vc_x == vc->vc_cols - 1) { 2769 vc->vc_need_wrap = vc->vc_decawm; 2770 draw_to = vc->vc_pos + 2; 2771 } else { 2772 vc->vc_x++; 2773 draw_to = (vc->vc_pos += 2); 2774 } 2775 2776 if (!--width) break; 2777 2778 tc = conv_uni_to_pc(vc, ' '); /* A space is printed in the second column */ 2779 if (tc < 0) tc = ' '; 2780 next_c = ' '; 2781 } 2782 notify_write(vc, c); 2783 2784 if (inverse) 2785 con_flush(vc, draw_from, draw_to, &draw_x); 2786 2787 if (rescan) { 2788 rescan = 0; 2789 inverse = 0; 2790 width = 1; 2791 c = orig; 2792 goto rescan_last_byte; 2793 } 2794 continue; 2795 } 2796 con_flush(vc, draw_from, draw_to, &draw_x); 2797 do_con_trol(tty, vc, orig); 2798 } 2799 con_flush(vc, draw_from, draw_to, &draw_x); 2800 vc_uniscr_debug_check(vc); 2801 console_conditional_schedule(); 2802 notify_update(vc); 2803 console_unlock(); 2804 return n; 2805 } 2806 2807 /* 2808 * This is the console switching callback. 2809 * 2810 * Doing console switching in a process context allows 2811 * us to do the switches asynchronously (needed when we want 2812 * to switch due to a keyboard interrupt). Synchronization 2813 * with other console code and prevention of re-entrancy is 2814 * ensured with console_lock. 2815 */ 2816 static void console_callback(struct work_struct *ignored) 2817 { 2818 console_lock(); 2819 2820 if (want_console >= 0) { 2821 if (want_console != fg_console && 2822 vc_cons_allocated(want_console)) { 2823 hide_cursor(vc_cons[fg_console].d); 2824 change_console(vc_cons[want_console].d); 2825 /* we only changed when the console had already 2826 been allocated - a new console is not created 2827 in an interrupt routine */ 2828 } 2829 want_console = -1; 2830 } 2831 if (do_poke_blanked_console) { /* do not unblank for a LED change */ 2832 do_poke_blanked_console = 0; 2833 poke_blanked_console(); 2834 } 2835 if (scrollback_delta) { 2836 struct vc_data *vc = vc_cons[fg_console].d; 2837 clear_selection(); 2838 if (vc->vc_mode == KD_TEXT && vc->vc_sw->con_scrolldelta) 2839 vc->vc_sw->con_scrolldelta(vc, scrollback_delta); 2840 scrollback_delta = 0; 2841 } 2842 if (blank_timer_expired) { 2843 do_blank_screen(0); 2844 blank_timer_expired = 0; 2845 } 2846 notify_update(vc_cons[fg_console].d); 2847 2848 console_unlock(); 2849 } 2850 2851 int set_console(int nr) 2852 { 2853 struct vc_data *vc = vc_cons[fg_console].d; 2854 2855 if (!vc_cons_allocated(nr) || vt_dont_switch || 2856 (vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) { 2857 2858 /* 2859 * Console switch will fail in console_callback() or 2860 * change_console() so there is no point scheduling 2861 * the callback 2862 * 2863 * Existing set_console() users don't check the return 2864 * value so this shouldn't break anything 2865 */ 2866 return -EINVAL; 2867 } 2868 2869 want_console = nr; 2870 schedule_console_callback(); 2871 2872 return 0; 2873 } 2874 2875 struct tty_driver *console_driver; 2876 2877 #ifdef CONFIG_VT_CONSOLE 2878 2879 /** 2880 * vt_kmsg_redirect() - Sets/gets the kernel message console 2881 * @new: The new virtual terminal number or -1 if the console should stay 2882 * unchanged 2883 * 2884 * By default, the kernel messages are always printed on the current virtual 2885 * console. However, the user may modify that default with the 2886 * TIOCL_SETKMSGREDIRECT ioctl call. 2887 * 2888 * This function sets the kernel message console to be @new. It returns the old 2889 * virtual console number. The virtual terminal number 0 (both as parameter and 2890 * return value) means no redirection (i.e. always printed on the currently 2891 * active console). 2892 * 2893 * The parameter -1 means that only the current console is returned, but the 2894 * value is not modified. You may use the macro vt_get_kmsg_redirect() in that 2895 * case to make the code more understandable. 2896 * 2897 * When the kernel is compiled without CONFIG_VT_CONSOLE, this function ignores 2898 * the parameter and always returns 0. 2899 */ 2900 int vt_kmsg_redirect(int new) 2901 { 2902 static int kmsg_con; 2903 2904 if (new != -1) 2905 return xchg(&kmsg_con, new); 2906 else 2907 return kmsg_con; 2908 } 2909 2910 /* 2911 * Console on virtual terminal 2912 * 2913 * The console must be locked when we get here. 2914 */ 2915 2916 static void vt_console_print(struct console *co, const char *b, unsigned count) 2917 { 2918 struct vc_data *vc = vc_cons[fg_console].d; 2919 unsigned char c; 2920 static DEFINE_SPINLOCK(printing_lock); 2921 const ushort *start; 2922 ushort start_x, cnt; 2923 int kmsg_console; 2924 2925 /* console busy or not yet initialized */ 2926 if (!printable) 2927 return; 2928 if (!spin_trylock(&printing_lock)) 2929 return; 2930 2931 kmsg_console = vt_get_kmsg_redirect(); 2932 if (kmsg_console && vc_cons_allocated(kmsg_console - 1)) 2933 vc = vc_cons[kmsg_console - 1].d; 2934 2935 if (!vc_cons_allocated(fg_console)) { 2936 /* impossible */ 2937 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */ 2938 goto quit; 2939 } 2940 2941 if (vc->vc_mode != KD_TEXT) 2942 goto quit; 2943 2944 /* undraw cursor first */ 2945 if (con_is_fg(vc)) 2946 hide_cursor(vc); 2947 2948 start = (ushort *)vc->vc_pos; 2949 start_x = vc->vc_x; 2950 cnt = 0; 2951 while (count--) { 2952 c = *b++; 2953 if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) { 2954 if (cnt && con_is_visible(vc)) 2955 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, start_x); 2956 cnt = 0; 2957 if (c == 8) { /* backspace */ 2958 bs(vc); 2959 start = (ushort *)vc->vc_pos; 2960 start_x = vc->vc_x; 2961 continue; 2962 } 2963 if (c != 13) 2964 lf(vc); 2965 cr(vc); 2966 start = (ushort *)vc->vc_pos; 2967 start_x = vc->vc_x; 2968 if (c == 10 || c == 13) 2969 continue; 2970 } 2971 vc_uniscr_putc(vc, c); 2972 scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos); 2973 notify_write(vc, c); 2974 cnt++; 2975 if (vc->vc_x == vc->vc_cols - 1) { 2976 vc->vc_need_wrap = 1; 2977 } else { 2978 vc->vc_pos += 2; 2979 vc->vc_x++; 2980 } 2981 } 2982 if (cnt && con_is_visible(vc)) 2983 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, start_x); 2984 set_cursor(vc); 2985 notify_update(vc); 2986 2987 quit: 2988 spin_unlock(&printing_lock); 2989 } 2990 2991 static struct tty_driver *vt_console_device(struct console *c, int *index) 2992 { 2993 *index = c->index ? c->index-1 : fg_console; 2994 return console_driver; 2995 } 2996 2997 static struct console vt_console_driver = { 2998 .name = "tty", 2999 .write = vt_console_print, 3000 .device = vt_console_device, 3001 .unblank = unblank_screen, 3002 .flags = CON_PRINTBUFFER, 3003 .index = -1, 3004 }; 3005 #endif 3006 3007 /* 3008 * Handling of Linux-specific VC ioctls 3009 */ 3010 3011 /* 3012 * Generally a bit racy with respect to console_lock();. 3013 * 3014 * There are some functions which don't need it. 3015 * 3016 * There are some functions which can sleep for arbitrary periods 3017 * (paste_selection) but we don't need the lock there anyway. 3018 * 3019 * set_selection_user has locking, and definitely needs it 3020 */ 3021 3022 int tioclinux(struct tty_struct *tty, unsigned long arg) 3023 { 3024 char type, data; 3025 char __user *p = (char __user *)arg; 3026 int lines; 3027 int ret; 3028 3029 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN)) 3030 return -EPERM; 3031 if (get_user(type, p)) 3032 return -EFAULT; 3033 ret = 0; 3034 3035 switch (type) 3036 { 3037 case TIOCL_SETSEL: 3038 console_lock(); 3039 ret = set_selection_user((struct tiocl_selection 3040 __user *)(p+1), tty); 3041 console_unlock(); 3042 break; 3043 case TIOCL_PASTESEL: 3044 ret = paste_selection(tty); 3045 break; 3046 case TIOCL_UNBLANKSCREEN: 3047 console_lock(); 3048 unblank_screen(); 3049 console_unlock(); 3050 break; 3051 case TIOCL_SELLOADLUT: 3052 console_lock(); 3053 ret = sel_loadlut(p); 3054 console_unlock(); 3055 break; 3056 case TIOCL_GETSHIFTSTATE: 3057 3058 /* 3059 * Make it possible to react to Shift+Mousebutton. 3060 * Note that 'shift_state' is an undocumented 3061 * kernel-internal variable; programs not closely 3062 * related to the kernel should not use this. 3063 */ 3064 data = vt_get_shift_state(); 3065 ret = put_user(data, p); 3066 break; 3067 case TIOCL_GETMOUSEREPORTING: 3068 console_lock(); /* May be overkill */ 3069 data = mouse_reporting(); 3070 console_unlock(); 3071 ret = put_user(data, p); 3072 break; 3073 case TIOCL_SETVESABLANK: 3074 console_lock(); 3075 ret = set_vesa_blanking(p); 3076 console_unlock(); 3077 break; 3078 case TIOCL_GETKMSGREDIRECT: 3079 data = vt_get_kmsg_redirect(); 3080 ret = put_user(data, p); 3081 break; 3082 case TIOCL_SETKMSGREDIRECT: 3083 if (!capable(CAP_SYS_ADMIN)) { 3084 ret = -EPERM; 3085 } else { 3086 if (get_user(data, p+1)) 3087 ret = -EFAULT; 3088 else 3089 vt_kmsg_redirect(data); 3090 } 3091 break; 3092 case TIOCL_GETFGCONSOLE: 3093 /* No locking needed as this is a transiently 3094 correct return anyway if the caller hasn't 3095 disabled switching */ 3096 ret = fg_console; 3097 break; 3098 case TIOCL_SCROLLCONSOLE: 3099 if (get_user(lines, (s32 __user *)(p+4))) { 3100 ret = -EFAULT; 3101 } else { 3102 /* Need the console lock here. Note that lots 3103 of other calls need fixing before the lock 3104 is actually useful ! */ 3105 console_lock(); 3106 scrollfront(vc_cons[fg_console].d, lines); 3107 console_unlock(); 3108 ret = 0; 3109 } 3110 break; 3111 case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */ 3112 console_lock(); 3113 ignore_poke = 1; 3114 do_blank_screen(0); 3115 console_unlock(); 3116 break; 3117 case TIOCL_BLANKEDSCREEN: 3118 ret = console_blanked; 3119 break; 3120 default: 3121 ret = -EINVAL; 3122 break; 3123 } 3124 return ret; 3125 } 3126 3127 /* 3128 * /dev/ttyN handling 3129 */ 3130 3131 static int con_write(struct tty_struct *tty, const unsigned char *buf, int count) 3132 { 3133 int retval; 3134 3135 retval = do_con_write(tty, buf, count); 3136 con_flush_chars(tty); 3137 3138 return retval; 3139 } 3140 3141 static int con_put_char(struct tty_struct *tty, unsigned char ch) 3142 { 3143 if (in_interrupt()) 3144 return 0; /* n_r3964 calls put_char() from interrupt context */ 3145 return do_con_write(tty, &ch, 1); 3146 } 3147 3148 static int con_write_room(struct tty_struct *tty) 3149 { 3150 if (tty->stopped) 3151 return 0; 3152 return 32768; /* No limit, really; we're not buffering */ 3153 } 3154 3155 static int con_chars_in_buffer(struct tty_struct *tty) 3156 { 3157 return 0; /* we're not buffering */ 3158 } 3159 3160 /* 3161 * con_throttle and con_unthrottle are only used for 3162 * paste_selection(), which has to stuff in a large number of 3163 * characters... 3164 */ 3165 static void con_throttle(struct tty_struct *tty) 3166 { 3167 } 3168 3169 static void con_unthrottle(struct tty_struct *tty) 3170 { 3171 struct vc_data *vc = tty->driver_data; 3172 3173 wake_up_interruptible(&vc->paste_wait); 3174 } 3175 3176 /* 3177 * Turn the Scroll-Lock LED on when the tty is stopped 3178 */ 3179 static void con_stop(struct tty_struct *tty) 3180 { 3181 int console_num; 3182 if (!tty) 3183 return; 3184 console_num = tty->index; 3185 if (!vc_cons_allocated(console_num)) 3186 return; 3187 vt_kbd_con_stop(console_num); 3188 } 3189 3190 /* 3191 * Turn the Scroll-Lock LED off when the console is started 3192 */ 3193 static void con_start(struct tty_struct *tty) 3194 { 3195 int console_num; 3196 if (!tty) 3197 return; 3198 console_num = tty->index; 3199 if (!vc_cons_allocated(console_num)) 3200 return; 3201 vt_kbd_con_start(console_num); 3202 } 3203 3204 static void con_flush_chars(struct tty_struct *tty) 3205 { 3206 struct vc_data *vc; 3207 3208 if (in_interrupt()) /* from flush_to_ldisc */ 3209 return; 3210 3211 /* if we race with con_close(), vt may be null */ 3212 console_lock(); 3213 vc = tty->driver_data; 3214 if (vc) 3215 set_cursor(vc); 3216 console_unlock(); 3217 } 3218 3219 /* 3220 * Allocate the console screen memory. 3221 */ 3222 static int con_install(struct tty_driver *driver, struct tty_struct *tty) 3223 { 3224 unsigned int currcons = tty->index; 3225 struct vc_data *vc; 3226 int ret; 3227 3228 console_lock(); 3229 ret = vc_allocate(currcons); 3230 if (ret) 3231 goto unlock; 3232 3233 vc = vc_cons[currcons].d; 3234 3235 /* Still being freed */ 3236 if (vc->port.tty) { 3237 ret = -ERESTARTSYS; 3238 goto unlock; 3239 } 3240 3241 ret = tty_port_install(&vc->port, driver, tty); 3242 if (ret) 3243 goto unlock; 3244 3245 tty->driver_data = vc; 3246 vc->port.tty = tty; 3247 3248 if (!tty->winsize.ws_row && !tty->winsize.ws_col) { 3249 tty->winsize.ws_row = vc_cons[currcons].d->vc_rows; 3250 tty->winsize.ws_col = vc_cons[currcons].d->vc_cols; 3251 } 3252 if (vc->vc_utf) 3253 tty->termios.c_iflag |= IUTF8; 3254 else 3255 tty->termios.c_iflag &= ~IUTF8; 3256 unlock: 3257 console_unlock(); 3258 return ret; 3259 } 3260 3261 static int con_open(struct tty_struct *tty, struct file *filp) 3262 { 3263 /* everything done in install */ 3264 return 0; 3265 } 3266 3267 3268 static void con_close(struct tty_struct *tty, struct file *filp) 3269 { 3270 /* Nothing to do - we defer to shutdown */ 3271 } 3272 3273 static void con_shutdown(struct tty_struct *tty) 3274 { 3275 struct vc_data *vc = tty->driver_data; 3276 BUG_ON(vc == NULL); 3277 console_lock(); 3278 vc->port.tty = NULL; 3279 console_unlock(); 3280 } 3281 3282 static int default_color = 7; /* white */ 3283 static int default_italic_color = 2; // green (ASCII) 3284 static int default_underline_color = 3; // cyan (ASCII) 3285 module_param_named(color, default_color, int, S_IRUGO | S_IWUSR); 3286 module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR); 3287 module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR); 3288 3289 static void vc_init(struct vc_data *vc, unsigned int rows, 3290 unsigned int cols, int do_clear) 3291 { 3292 int j, k ; 3293 3294 vc->vc_cols = cols; 3295 vc->vc_rows = rows; 3296 vc->vc_size_row = cols << 1; 3297 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row; 3298 3299 set_origin(vc); 3300 vc->vc_pos = vc->vc_origin; 3301 reset_vc(vc); 3302 for (j=k=0; j<16; j++) { 3303 vc->vc_palette[k++] = default_red[j] ; 3304 vc->vc_palette[k++] = default_grn[j] ; 3305 vc->vc_palette[k++] = default_blu[j] ; 3306 } 3307 vc->vc_def_color = default_color; 3308 vc->vc_ulcolor = default_underline_color; 3309 vc->vc_itcolor = default_italic_color; 3310 vc->vc_halfcolor = 0x08; /* grey */ 3311 init_waitqueue_head(&vc->paste_wait); 3312 reset_terminal(vc, do_clear); 3313 } 3314 3315 /* 3316 * This routine initializes console interrupts, and does nothing 3317 * else. If you want the screen to clear, call tty_write with 3318 * the appropriate escape-sequence. 3319 */ 3320 3321 static int __init con_init(void) 3322 { 3323 const char *display_desc = NULL; 3324 struct vc_data *vc; 3325 unsigned int currcons = 0, i; 3326 3327 console_lock(); 3328 3329 if (conswitchp) 3330 display_desc = conswitchp->con_startup(); 3331 if (!display_desc) { 3332 fg_console = 0; 3333 console_unlock(); 3334 return 0; 3335 } 3336 3337 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3338 struct con_driver *con_driver = ®istered_con_driver[i]; 3339 3340 if (con_driver->con == NULL) { 3341 con_driver->con = conswitchp; 3342 con_driver->desc = display_desc; 3343 con_driver->flag = CON_DRIVER_FLAG_INIT; 3344 con_driver->first = 0; 3345 con_driver->last = MAX_NR_CONSOLES - 1; 3346 break; 3347 } 3348 } 3349 3350 for (i = 0; i < MAX_NR_CONSOLES; i++) 3351 con_driver_map[i] = conswitchp; 3352 3353 if (blankinterval) { 3354 blank_state = blank_normal_wait; 3355 mod_timer(&console_timer, jiffies + (blankinterval * HZ)); 3356 } 3357 3358 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) { 3359 vc_cons[currcons].d = vc = kzalloc(sizeof(struct vc_data), GFP_NOWAIT); 3360 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK); 3361 tty_port_init(&vc->port); 3362 visual_init(vc, currcons, 1); 3363 vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_NOWAIT); 3364 vc_init(vc, vc->vc_rows, vc->vc_cols, 3365 currcons || !vc->vc_sw->con_save_screen); 3366 } 3367 currcons = fg_console = 0; 3368 master_display_fg = vc = vc_cons[currcons].d; 3369 set_origin(vc); 3370 save_screen(vc); 3371 gotoxy(vc, vc->vc_x, vc->vc_y); 3372 csi_J(vc, 0); 3373 update_screen(vc); 3374 pr_info("Console: %s %s %dx%d\n", 3375 vc->vc_can_do_color ? "colour" : "mono", 3376 display_desc, vc->vc_cols, vc->vc_rows); 3377 printable = 1; 3378 3379 console_unlock(); 3380 3381 #ifdef CONFIG_VT_CONSOLE 3382 register_console(&vt_console_driver); 3383 #endif 3384 return 0; 3385 } 3386 console_initcall(con_init); 3387 3388 static const struct tty_operations con_ops = { 3389 .install = con_install, 3390 .open = con_open, 3391 .close = con_close, 3392 .write = con_write, 3393 .write_room = con_write_room, 3394 .put_char = con_put_char, 3395 .flush_chars = con_flush_chars, 3396 .chars_in_buffer = con_chars_in_buffer, 3397 .ioctl = vt_ioctl, 3398 #ifdef CONFIG_COMPAT 3399 .compat_ioctl = vt_compat_ioctl, 3400 #endif 3401 .stop = con_stop, 3402 .start = con_start, 3403 .throttle = con_throttle, 3404 .unthrottle = con_unthrottle, 3405 .resize = vt_resize, 3406 .shutdown = con_shutdown 3407 }; 3408 3409 static struct cdev vc0_cdev; 3410 3411 static ssize_t show_tty_active(struct device *dev, 3412 struct device_attribute *attr, char *buf) 3413 { 3414 return sprintf(buf, "tty%d\n", fg_console + 1); 3415 } 3416 static DEVICE_ATTR(active, S_IRUGO, show_tty_active, NULL); 3417 3418 static struct attribute *vt_dev_attrs[] = { 3419 &dev_attr_active.attr, 3420 NULL 3421 }; 3422 3423 ATTRIBUTE_GROUPS(vt_dev); 3424 3425 int __init vty_init(const struct file_operations *console_fops) 3426 { 3427 cdev_init(&vc0_cdev, console_fops); 3428 if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) || 3429 register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0) 3430 panic("Couldn't register /dev/tty0 driver\n"); 3431 tty0dev = device_create_with_groups(tty_class, NULL, 3432 MKDEV(TTY_MAJOR, 0), NULL, 3433 vt_dev_groups, "tty0"); 3434 if (IS_ERR(tty0dev)) 3435 tty0dev = NULL; 3436 3437 vcs_init(); 3438 3439 console_driver = alloc_tty_driver(MAX_NR_CONSOLES); 3440 if (!console_driver) 3441 panic("Couldn't allocate console driver\n"); 3442 3443 console_driver->name = "tty"; 3444 console_driver->name_base = 1; 3445 console_driver->major = TTY_MAJOR; 3446 console_driver->minor_start = 1; 3447 console_driver->type = TTY_DRIVER_TYPE_CONSOLE; 3448 console_driver->init_termios = tty_std_termios; 3449 if (default_utf8) 3450 console_driver->init_termios.c_iflag |= IUTF8; 3451 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS; 3452 tty_set_operations(console_driver, &con_ops); 3453 if (tty_register_driver(console_driver)) 3454 panic("Couldn't register console driver\n"); 3455 kbd_init(); 3456 console_map_init(); 3457 #ifdef CONFIG_MDA_CONSOLE 3458 mda_console_init(); 3459 #endif 3460 return 0; 3461 } 3462 3463 #ifndef VT_SINGLE_DRIVER 3464 3465 static struct class *vtconsole_class; 3466 3467 static int do_bind_con_driver(const struct consw *csw, int first, int last, 3468 int deflt) 3469 { 3470 struct module *owner = csw->owner; 3471 const char *desc = NULL; 3472 struct con_driver *con_driver; 3473 int i, j = -1, k = -1, retval = -ENODEV; 3474 3475 if (!try_module_get(owner)) 3476 return -ENODEV; 3477 3478 WARN_CONSOLE_UNLOCKED(); 3479 3480 /* check if driver is registered */ 3481 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3482 con_driver = ®istered_con_driver[i]; 3483 3484 if (con_driver->con == csw) { 3485 desc = con_driver->desc; 3486 retval = 0; 3487 break; 3488 } 3489 } 3490 3491 if (retval) 3492 goto err; 3493 3494 if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) { 3495 csw->con_startup(); 3496 con_driver->flag |= CON_DRIVER_FLAG_INIT; 3497 } 3498 3499 if (deflt) { 3500 if (conswitchp) 3501 module_put(conswitchp->owner); 3502 3503 __module_get(owner); 3504 conswitchp = csw; 3505 } 3506 3507 first = max(first, con_driver->first); 3508 last = min(last, con_driver->last); 3509 3510 for (i = first; i <= last; i++) { 3511 int old_was_color; 3512 struct vc_data *vc = vc_cons[i].d; 3513 3514 if (con_driver_map[i]) 3515 module_put(con_driver_map[i]->owner); 3516 __module_get(owner); 3517 con_driver_map[i] = csw; 3518 3519 if (!vc || !vc->vc_sw) 3520 continue; 3521 3522 j = i; 3523 3524 if (con_is_visible(vc)) { 3525 k = i; 3526 save_screen(vc); 3527 } 3528 3529 old_was_color = vc->vc_can_do_color; 3530 vc->vc_sw->con_deinit(vc); 3531 vc->vc_origin = (unsigned long)vc->vc_screenbuf; 3532 visual_init(vc, i, 0); 3533 set_origin(vc); 3534 update_attr(vc); 3535 3536 /* If the console changed between mono <-> color, then 3537 * the attributes in the screenbuf will be wrong. The 3538 * following resets all attributes to something sane. 3539 */ 3540 if (old_was_color != vc->vc_can_do_color) 3541 clear_buffer_attributes(vc); 3542 } 3543 3544 pr_info("Console: switching "); 3545 if (!deflt) 3546 pr_cont("consoles %d-%d ", first + 1, last + 1); 3547 if (j >= 0) { 3548 struct vc_data *vc = vc_cons[j].d; 3549 3550 pr_cont("to %s %s %dx%d\n", 3551 vc->vc_can_do_color ? "colour" : "mono", 3552 desc, vc->vc_cols, vc->vc_rows); 3553 3554 if (k >= 0) { 3555 vc = vc_cons[k].d; 3556 update_screen(vc); 3557 } 3558 } else { 3559 pr_cont("to %s\n", desc); 3560 } 3561 3562 retval = 0; 3563 err: 3564 module_put(owner); 3565 return retval; 3566 }; 3567 3568 3569 #ifdef CONFIG_VT_HW_CONSOLE_BINDING 3570 /* unlocked version of unbind_con_driver() */ 3571 int do_unbind_con_driver(const struct consw *csw, int first, int last, int deflt) 3572 { 3573 struct module *owner = csw->owner; 3574 const struct consw *defcsw = NULL; 3575 struct con_driver *con_driver = NULL, *con_back = NULL; 3576 int i, retval = -ENODEV; 3577 3578 if (!try_module_get(owner)) 3579 return -ENODEV; 3580 3581 WARN_CONSOLE_UNLOCKED(); 3582 3583 /* check if driver is registered and if it is unbindable */ 3584 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3585 con_driver = ®istered_con_driver[i]; 3586 3587 if (con_driver->con == csw && 3588 con_driver->flag & CON_DRIVER_FLAG_MODULE) { 3589 retval = 0; 3590 break; 3591 } 3592 } 3593 3594 if (retval) 3595 goto err; 3596 3597 retval = -ENODEV; 3598 3599 /* check if backup driver exists */ 3600 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3601 con_back = ®istered_con_driver[i]; 3602 3603 if (con_back->con && con_back->con != csw) { 3604 defcsw = con_back->con; 3605 retval = 0; 3606 break; 3607 } 3608 } 3609 3610 if (retval) 3611 goto err; 3612 3613 if (!con_is_bound(csw)) 3614 goto err; 3615 3616 first = max(first, con_driver->first); 3617 last = min(last, con_driver->last); 3618 3619 for (i = first; i <= last; i++) { 3620 if (con_driver_map[i] == csw) { 3621 module_put(csw->owner); 3622 con_driver_map[i] = NULL; 3623 } 3624 } 3625 3626 if (!con_is_bound(defcsw)) { 3627 const struct consw *defconsw = conswitchp; 3628 3629 defcsw->con_startup(); 3630 con_back->flag |= CON_DRIVER_FLAG_INIT; 3631 /* 3632 * vgacon may change the default driver to point 3633 * to dummycon, we restore it here... 3634 */ 3635 conswitchp = defconsw; 3636 } 3637 3638 if (!con_is_bound(csw)) 3639 con_driver->flag &= ~CON_DRIVER_FLAG_INIT; 3640 3641 /* ignore return value, binding should not fail */ 3642 do_bind_con_driver(defcsw, first, last, deflt); 3643 err: 3644 module_put(owner); 3645 return retval; 3646 3647 } 3648 EXPORT_SYMBOL_GPL(do_unbind_con_driver); 3649 3650 static int vt_bind(struct con_driver *con) 3651 { 3652 const struct consw *defcsw = NULL, *csw = NULL; 3653 int i, more = 1, first = -1, last = -1, deflt = 0; 3654 3655 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE)) 3656 goto err; 3657 3658 csw = con->con; 3659 3660 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3661 struct con_driver *con = ®istered_con_driver[i]; 3662 3663 if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) { 3664 defcsw = con->con; 3665 break; 3666 } 3667 } 3668 3669 if (!defcsw) 3670 goto err; 3671 3672 while (more) { 3673 more = 0; 3674 3675 for (i = con->first; i <= con->last; i++) { 3676 if (con_driver_map[i] == defcsw) { 3677 if (first == -1) 3678 first = i; 3679 last = i; 3680 more = 1; 3681 } else if (first != -1) 3682 break; 3683 } 3684 3685 if (first == 0 && last == MAX_NR_CONSOLES -1) 3686 deflt = 1; 3687 3688 if (first != -1) 3689 do_bind_con_driver(csw, first, last, deflt); 3690 3691 first = -1; 3692 last = -1; 3693 deflt = 0; 3694 } 3695 3696 err: 3697 return 0; 3698 } 3699 3700 static int vt_unbind(struct con_driver *con) 3701 { 3702 const struct consw *csw = NULL; 3703 int i, more = 1, first = -1, last = -1, deflt = 0; 3704 int ret; 3705 3706 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE)) 3707 goto err; 3708 3709 csw = con->con; 3710 3711 while (more) { 3712 more = 0; 3713 3714 for (i = con->first; i <= con->last; i++) { 3715 if (con_driver_map[i] == csw) { 3716 if (first == -1) 3717 first = i; 3718 last = i; 3719 more = 1; 3720 } else if (first != -1) 3721 break; 3722 } 3723 3724 if (first == 0 && last == MAX_NR_CONSOLES -1) 3725 deflt = 1; 3726 3727 if (first != -1) { 3728 ret = do_unbind_con_driver(csw, first, last, deflt); 3729 if (ret != 0) 3730 return ret; 3731 } 3732 3733 first = -1; 3734 last = -1; 3735 deflt = 0; 3736 } 3737 3738 err: 3739 return 0; 3740 } 3741 #else 3742 static inline int vt_bind(struct con_driver *con) 3743 { 3744 return 0; 3745 } 3746 static inline int vt_unbind(struct con_driver *con) 3747 { 3748 return 0; 3749 } 3750 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */ 3751 3752 static ssize_t store_bind(struct device *dev, struct device_attribute *attr, 3753 const char *buf, size_t count) 3754 { 3755 struct con_driver *con = dev_get_drvdata(dev); 3756 int bind = simple_strtoul(buf, NULL, 0); 3757 3758 console_lock(); 3759 3760 if (bind) 3761 vt_bind(con); 3762 else 3763 vt_unbind(con); 3764 3765 console_unlock(); 3766 3767 return count; 3768 } 3769 3770 static ssize_t show_bind(struct device *dev, struct device_attribute *attr, 3771 char *buf) 3772 { 3773 struct con_driver *con = dev_get_drvdata(dev); 3774 int bind = con_is_bound(con->con); 3775 3776 return snprintf(buf, PAGE_SIZE, "%i\n", bind); 3777 } 3778 3779 static ssize_t show_name(struct device *dev, struct device_attribute *attr, 3780 char *buf) 3781 { 3782 struct con_driver *con = dev_get_drvdata(dev); 3783 3784 return snprintf(buf, PAGE_SIZE, "%s %s\n", 3785 (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)", 3786 con->desc); 3787 3788 } 3789 3790 static DEVICE_ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind); 3791 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); 3792 3793 static struct attribute *con_dev_attrs[] = { 3794 &dev_attr_bind.attr, 3795 &dev_attr_name.attr, 3796 NULL 3797 }; 3798 3799 ATTRIBUTE_GROUPS(con_dev); 3800 3801 static int vtconsole_init_device(struct con_driver *con) 3802 { 3803 con->flag |= CON_DRIVER_FLAG_ATTR; 3804 return 0; 3805 } 3806 3807 static void vtconsole_deinit_device(struct con_driver *con) 3808 { 3809 con->flag &= ~CON_DRIVER_FLAG_ATTR; 3810 } 3811 3812 /** 3813 * con_is_bound - checks if driver is bound to the console 3814 * @csw: console driver 3815 * 3816 * RETURNS: zero if unbound, nonzero if bound 3817 * 3818 * Drivers can call this and if zero, they should release 3819 * all resources allocated on con_startup() 3820 */ 3821 int con_is_bound(const struct consw *csw) 3822 { 3823 int i, bound = 0; 3824 3825 for (i = 0; i < MAX_NR_CONSOLES; i++) { 3826 if (con_driver_map[i] == csw) { 3827 bound = 1; 3828 break; 3829 } 3830 } 3831 3832 return bound; 3833 } 3834 EXPORT_SYMBOL(con_is_bound); 3835 3836 /** 3837 * con_debug_enter - prepare the console for the kernel debugger 3838 * @sw: console driver 3839 * 3840 * Called when the console is taken over by the kernel debugger, this 3841 * function needs to save the current console state, then put the console 3842 * into a state suitable for the kernel debugger. 3843 * 3844 * RETURNS: 3845 * Zero on success, nonzero if a failure occurred when trying to prepare 3846 * the console for the debugger. 3847 */ 3848 int con_debug_enter(struct vc_data *vc) 3849 { 3850 int ret = 0; 3851 3852 saved_fg_console = fg_console; 3853 saved_last_console = last_console; 3854 saved_want_console = want_console; 3855 saved_vc_mode = vc->vc_mode; 3856 saved_console_blanked = console_blanked; 3857 vc->vc_mode = KD_TEXT; 3858 console_blanked = 0; 3859 if (vc->vc_sw->con_debug_enter) 3860 ret = vc->vc_sw->con_debug_enter(vc); 3861 #ifdef CONFIG_KGDB_KDB 3862 /* Set the initial LINES variable if it is not already set */ 3863 if (vc->vc_rows < 999) { 3864 int linecount; 3865 char lns[4]; 3866 const char *setargs[3] = { 3867 "set", 3868 "LINES", 3869 lns, 3870 }; 3871 if (kdbgetintenv(setargs[0], &linecount)) { 3872 snprintf(lns, 4, "%i", vc->vc_rows); 3873 kdb_set(2, setargs); 3874 } 3875 } 3876 if (vc->vc_cols < 999) { 3877 int colcount; 3878 char cols[4]; 3879 const char *setargs[3] = { 3880 "set", 3881 "COLUMNS", 3882 cols, 3883 }; 3884 if (kdbgetintenv(setargs[0], &colcount)) { 3885 snprintf(cols, 4, "%i", vc->vc_cols); 3886 kdb_set(2, setargs); 3887 } 3888 } 3889 #endif /* CONFIG_KGDB_KDB */ 3890 return ret; 3891 } 3892 EXPORT_SYMBOL_GPL(con_debug_enter); 3893 3894 /** 3895 * con_debug_leave - restore console state 3896 * @sw: console driver 3897 * 3898 * Restore the console state to what it was before the kernel debugger 3899 * was invoked. 3900 * 3901 * RETURNS: 3902 * Zero on success, nonzero if a failure occurred when trying to restore 3903 * the console. 3904 */ 3905 int con_debug_leave(void) 3906 { 3907 struct vc_data *vc; 3908 int ret = 0; 3909 3910 fg_console = saved_fg_console; 3911 last_console = saved_last_console; 3912 want_console = saved_want_console; 3913 console_blanked = saved_console_blanked; 3914 vc_cons[fg_console].d->vc_mode = saved_vc_mode; 3915 3916 vc = vc_cons[fg_console].d; 3917 if (vc->vc_sw->con_debug_leave) 3918 ret = vc->vc_sw->con_debug_leave(vc); 3919 return ret; 3920 } 3921 EXPORT_SYMBOL_GPL(con_debug_leave); 3922 3923 static int do_register_con_driver(const struct consw *csw, int first, int last) 3924 { 3925 struct module *owner = csw->owner; 3926 struct con_driver *con_driver; 3927 const char *desc; 3928 int i, retval; 3929 3930 WARN_CONSOLE_UNLOCKED(); 3931 3932 if (!try_module_get(owner)) 3933 return -ENODEV; 3934 3935 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3936 con_driver = ®istered_con_driver[i]; 3937 3938 /* already registered */ 3939 if (con_driver->con == csw) { 3940 retval = -EBUSY; 3941 goto err; 3942 } 3943 } 3944 3945 desc = csw->con_startup(); 3946 if (!desc) { 3947 retval = -ENODEV; 3948 goto err; 3949 } 3950 3951 retval = -EINVAL; 3952 3953 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3954 con_driver = ®istered_con_driver[i]; 3955 3956 if (con_driver->con == NULL && 3957 !(con_driver->flag & CON_DRIVER_FLAG_ZOMBIE)) { 3958 con_driver->con = csw; 3959 con_driver->desc = desc; 3960 con_driver->node = i; 3961 con_driver->flag = CON_DRIVER_FLAG_MODULE | 3962 CON_DRIVER_FLAG_INIT; 3963 con_driver->first = first; 3964 con_driver->last = last; 3965 retval = 0; 3966 break; 3967 } 3968 } 3969 3970 if (retval) 3971 goto err; 3972 3973 con_driver->dev = 3974 device_create_with_groups(vtconsole_class, NULL, 3975 MKDEV(0, con_driver->node), 3976 con_driver, con_dev_groups, 3977 "vtcon%i", con_driver->node); 3978 if (IS_ERR(con_driver->dev)) { 3979 pr_warn("Unable to create device for %s; errno = %ld\n", 3980 con_driver->desc, PTR_ERR(con_driver->dev)); 3981 con_driver->dev = NULL; 3982 } else { 3983 vtconsole_init_device(con_driver); 3984 } 3985 3986 err: 3987 module_put(owner); 3988 return retval; 3989 } 3990 3991 3992 /** 3993 * do_unregister_con_driver - unregister console driver from console layer 3994 * @csw: console driver 3995 * 3996 * DESCRIPTION: All drivers that registers to the console layer must 3997 * call this function upon exit, or if the console driver is in a state 3998 * where it won't be able to handle console services, such as the 3999 * framebuffer console without loaded framebuffer drivers. 4000 * 4001 * The driver must unbind first prior to unregistration. 4002 */ 4003 int do_unregister_con_driver(const struct consw *csw) 4004 { 4005 int i; 4006 4007 /* cannot unregister a bound driver */ 4008 if (con_is_bound(csw)) 4009 return -EBUSY; 4010 4011 if (csw == conswitchp) 4012 return -EINVAL; 4013 4014 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 4015 struct con_driver *con_driver = ®istered_con_driver[i]; 4016 4017 if (con_driver->con == csw) { 4018 /* 4019 * Defer the removal of the sysfs entries since that 4020 * will acquire the kernfs s_active lock and we can't 4021 * acquire this lock while holding the console lock: 4022 * the unbind sysfs entry imposes already the opposite 4023 * order. Reset con already here to prevent any later 4024 * lookup to succeed and mark this slot as zombie, so 4025 * it won't get reused until we complete the removal 4026 * in the deferred work. 4027 */ 4028 con_driver->con = NULL; 4029 con_driver->flag = CON_DRIVER_FLAG_ZOMBIE; 4030 schedule_work(&con_driver_unregister_work); 4031 4032 return 0; 4033 } 4034 } 4035 4036 return -ENODEV; 4037 } 4038 EXPORT_SYMBOL_GPL(do_unregister_con_driver); 4039 4040 static void con_driver_unregister_callback(struct work_struct *ignored) 4041 { 4042 int i; 4043 4044 console_lock(); 4045 4046 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 4047 struct con_driver *con_driver = ®istered_con_driver[i]; 4048 4049 if (!(con_driver->flag & CON_DRIVER_FLAG_ZOMBIE)) 4050 continue; 4051 4052 console_unlock(); 4053 4054 vtconsole_deinit_device(con_driver); 4055 device_destroy(vtconsole_class, MKDEV(0, con_driver->node)); 4056 4057 console_lock(); 4058 4059 if (WARN_ON_ONCE(con_driver->con)) 4060 con_driver->con = NULL; 4061 con_driver->desc = NULL; 4062 con_driver->dev = NULL; 4063 con_driver->node = 0; 4064 WARN_ON_ONCE(con_driver->flag != CON_DRIVER_FLAG_ZOMBIE); 4065 con_driver->flag = 0; 4066 con_driver->first = 0; 4067 con_driver->last = 0; 4068 } 4069 4070 console_unlock(); 4071 } 4072 4073 /* 4074 * If we support more console drivers, this function is used 4075 * when a driver wants to take over some existing consoles 4076 * and become default driver for newly opened ones. 4077 * 4078 * do_take_over_console is basically a register followed by unbind 4079 */ 4080 int do_take_over_console(const struct consw *csw, int first, int last, int deflt) 4081 { 4082 int err; 4083 4084 err = do_register_con_driver(csw, first, last); 4085 /* 4086 * If we get an busy error we still want to bind the console driver 4087 * and return success, as we may have unbound the console driver 4088 * but not unregistered it. 4089 */ 4090 if (err == -EBUSY) 4091 err = 0; 4092 if (!err) 4093 do_bind_con_driver(csw, first, last, deflt); 4094 4095 return err; 4096 } 4097 EXPORT_SYMBOL_GPL(do_take_over_console); 4098 4099 4100 /* 4101 * give_up_console is a wrapper to unregister_con_driver. It will only 4102 * work if driver is fully unbound. 4103 */ 4104 void give_up_console(const struct consw *csw) 4105 { 4106 console_lock(); 4107 do_unregister_con_driver(csw); 4108 console_unlock(); 4109 } 4110 4111 static int __init vtconsole_class_init(void) 4112 { 4113 int i; 4114 4115 vtconsole_class = class_create(THIS_MODULE, "vtconsole"); 4116 if (IS_ERR(vtconsole_class)) { 4117 pr_warn("Unable to create vt console class; errno = %ld\n", 4118 PTR_ERR(vtconsole_class)); 4119 vtconsole_class = NULL; 4120 } 4121 4122 /* Add system drivers to sysfs */ 4123 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 4124 struct con_driver *con = ®istered_con_driver[i]; 4125 4126 if (con->con && !con->dev) { 4127 con->dev = 4128 device_create_with_groups(vtconsole_class, NULL, 4129 MKDEV(0, con->node), 4130 con, con_dev_groups, 4131 "vtcon%i", con->node); 4132 4133 if (IS_ERR(con->dev)) { 4134 pr_warn("Unable to create device for %s; errno = %ld\n", 4135 con->desc, PTR_ERR(con->dev)); 4136 con->dev = NULL; 4137 } else { 4138 vtconsole_init_device(con); 4139 } 4140 } 4141 } 4142 4143 return 0; 4144 } 4145 postcore_initcall(vtconsole_class_init); 4146 4147 #endif 4148 4149 /* 4150 * Screen blanking 4151 */ 4152 4153 static int set_vesa_blanking(char __user *p) 4154 { 4155 unsigned int mode; 4156 4157 if (get_user(mode, p + 1)) 4158 return -EFAULT; 4159 4160 vesa_blank_mode = (mode < 4) ? mode : 0; 4161 return 0; 4162 } 4163 4164 void do_blank_screen(int entering_gfx) 4165 { 4166 struct vc_data *vc = vc_cons[fg_console].d; 4167 int i; 4168 4169 WARN_CONSOLE_UNLOCKED(); 4170 4171 if (console_blanked) { 4172 if (blank_state == blank_vesa_wait) { 4173 blank_state = blank_off; 4174 vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0); 4175 } 4176 return; 4177 } 4178 4179 /* entering graphics mode? */ 4180 if (entering_gfx) { 4181 hide_cursor(vc); 4182 save_screen(vc); 4183 vc->vc_sw->con_blank(vc, -1, 1); 4184 console_blanked = fg_console + 1; 4185 blank_state = blank_off; 4186 set_origin(vc); 4187 return; 4188 } 4189 4190 blank_state = blank_off; 4191 4192 /* don't blank graphics */ 4193 if (vc->vc_mode != KD_TEXT) { 4194 console_blanked = fg_console + 1; 4195 return; 4196 } 4197 4198 hide_cursor(vc); 4199 del_timer_sync(&console_timer); 4200 blank_timer_expired = 0; 4201 4202 save_screen(vc); 4203 /* In case we need to reset origin, blanking hook returns 1 */ 4204 i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0); 4205 console_blanked = fg_console + 1; 4206 if (i) 4207 set_origin(vc); 4208 4209 if (console_blank_hook && console_blank_hook(1)) 4210 return; 4211 4212 if (vesa_off_interval && vesa_blank_mode) { 4213 blank_state = blank_vesa_wait; 4214 mod_timer(&console_timer, jiffies + vesa_off_interval); 4215 } 4216 vt_event_post(VT_EVENT_BLANK, vc->vc_num, vc->vc_num); 4217 } 4218 EXPORT_SYMBOL(do_blank_screen); 4219 4220 /* 4221 * Called by timer as well as from vt_console_driver 4222 */ 4223 void do_unblank_screen(int leaving_gfx) 4224 { 4225 struct vc_data *vc; 4226 4227 /* This should now always be called from a "sane" (read: can schedule) 4228 * context for the sake of the low level drivers, except in the special 4229 * case of oops_in_progress 4230 */ 4231 if (!oops_in_progress) 4232 might_sleep(); 4233 4234 WARN_CONSOLE_UNLOCKED(); 4235 4236 ignore_poke = 0; 4237 if (!console_blanked) 4238 return; 4239 if (!vc_cons_allocated(fg_console)) { 4240 /* impossible */ 4241 pr_warn("unblank_screen: tty %d not allocated ??\n", 4242 fg_console + 1); 4243 return; 4244 } 4245 vc = vc_cons[fg_console].d; 4246 if (vc->vc_mode != KD_TEXT) 4247 return; /* but leave console_blanked != 0 */ 4248 4249 if (blankinterval) { 4250 mod_timer(&console_timer, jiffies + (blankinterval * HZ)); 4251 blank_state = blank_normal_wait; 4252 } 4253 4254 console_blanked = 0; 4255 if (vc->vc_sw->con_blank(vc, 0, leaving_gfx)) 4256 /* Low-level driver cannot restore -> do it ourselves */ 4257 update_screen(vc); 4258 if (console_blank_hook) 4259 console_blank_hook(0); 4260 set_palette(vc); 4261 set_cursor(vc); 4262 vt_event_post(VT_EVENT_UNBLANK, vc->vc_num, vc->vc_num); 4263 } 4264 EXPORT_SYMBOL(do_unblank_screen); 4265 4266 /* 4267 * This is called by the outside world to cause a forced unblank, mostly for 4268 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually 4269 * call it with 1 as an argument and so force a mode restore... that may kill 4270 * X or at least garbage the screen but would also make the Oops visible... 4271 */ 4272 void unblank_screen(void) 4273 { 4274 do_unblank_screen(0); 4275 } 4276 4277 /* 4278 * We defer the timer blanking to work queue so it can take the console mutex 4279 * (console operations can still happen at irq time, but only from printk which 4280 * has the console mutex. Not perfect yet, but better than no locking 4281 */ 4282 static void blank_screen_t(struct timer_list *unused) 4283 { 4284 blank_timer_expired = 1; 4285 schedule_work(&console_work); 4286 } 4287 4288 void poke_blanked_console(void) 4289 { 4290 WARN_CONSOLE_UNLOCKED(); 4291 4292 /* Add this so we quickly catch whoever might call us in a non 4293 * safe context. Nowadays, unblank_screen() isn't to be called in 4294 * atomic contexts and is allowed to schedule (with the special case 4295 * of oops_in_progress, but that isn't of any concern for this 4296 * function. --BenH. 4297 */ 4298 might_sleep(); 4299 4300 /* This isn't perfectly race free, but a race here would be mostly harmless, 4301 * at worse, we'll do a spurrious blank and it's unlikely 4302 */ 4303 del_timer(&console_timer); 4304 blank_timer_expired = 0; 4305 4306 if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS) 4307 return; 4308 if (console_blanked) 4309 unblank_screen(); 4310 else if (blankinterval) { 4311 mod_timer(&console_timer, jiffies + (blankinterval * HZ)); 4312 blank_state = blank_normal_wait; 4313 } 4314 } 4315 4316 /* 4317 * Palettes 4318 */ 4319 4320 static void set_palette(struct vc_data *vc) 4321 { 4322 WARN_CONSOLE_UNLOCKED(); 4323 4324 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_set_palette) 4325 vc->vc_sw->con_set_palette(vc, color_table); 4326 } 4327 4328 /* 4329 * Load palette into the DAC registers. arg points to a colour 4330 * map, 3 bytes per colour, 16 colours, range from 0 to 255. 4331 */ 4332 4333 int con_set_cmap(unsigned char __user *arg) 4334 { 4335 int i, j, k; 4336 unsigned char colormap[3*16]; 4337 4338 if (copy_from_user(colormap, arg, sizeof(colormap))) 4339 return -EFAULT; 4340 4341 console_lock(); 4342 for (i = k = 0; i < 16; i++) { 4343 default_red[i] = colormap[k++]; 4344 default_grn[i] = colormap[k++]; 4345 default_blu[i] = colormap[k++]; 4346 } 4347 for (i = 0; i < MAX_NR_CONSOLES; i++) { 4348 if (!vc_cons_allocated(i)) 4349 continue; 4350 for (j = k = 0; j < 16; j++) { 4351 vc_cons[i].d->vc_palette[k++] = default_red[j]; 4352 vc_cons[i].d->vc_palette[k++] = default_grn[j]; 4353 vc_cons[i].d->vc_palette[k++] = default_blu[j]; 4354 } 4355 set_palette(vc_cons[i].d); 4356 } 4357 console_unlock(); 4358 4359 return 0; 4360 } 4361 4362 int con_get_cmap(unsigned char __user *arg) 4363 { 4364 int i, k; 4365 unsigned char colormap[3*16]; 4366 4367 console_lock(); 4368 for (i = k = 0; i < 16; i++) { 4369 colormap[k++] = default_red[i]; 4370 colormap[k++] = default_grn[i]; 4371 colormap[k++] = default_blu[i]; 4372 } 4373 console_unlock(); 4374 4375 if (copy_to_user(arg, colormap, sizeof(colormap))) 4376 return -EFAULT; 4377 4378 return 0; 4379 } 4380 4381 void reset_palette(struct vc_data *vc) 4382 { 4383 int j, k; 4384 for (j=k=0; j<16; j++) { 4385 vc->vc_palette[k++] = default_red[j]; 4386 vc->vc_palette[k++] = default_grn[j]; 4387 vc->vc_palette[k++] = default_blu[j]; 4388 } 4389 set_palette(vc); 4390 } 4391 4392 /* 4393 * Font switching 4394 * 4395 * Currently we only support fonts up to 32 pixels wide, at a maximum height 4396 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints, 4397 * depending on width) reserved for each character which is kinda wasty, but 4398 * this is done in order to maintain compatibility with the EGA/VGA fonts. It 4399 * is up to the actual low-level console-driver convert data into its favorite 4400 * format (maybe we should add a `fontoffset' field to the `display' 4401 * structure so we won't have to convert the fontdata all the time. 4402 * /Jes 4403 */ 4404 4405 #define max_font_size 65536 4406 4407 static int con_font_get(struct vc_data *vc, struct console_font_op *op) 4408 { 4409 struct console_font font; 4410 int rc = -EINVAL; 4411 int c; 4412 4413 if (op->data) { 4414 font.data = kmalloc(max_font_size, GFP_KERNEL); 4415 if (!font.data) 4416 return -ENOMEM; 4417 } else 4418 font.data = NULL; 4419 4420 console_lock(); 4421 if (vc->vc_mode != KD_TEXT) 4422 rc = -EINVAL; 4423 else if (vc->vc_sw->con_font_get) 4424 rc = vc->vc_sw->con_font_get(vc, &font); 4425 else 4426 rc = -ENOSYS; 4427 console_unlock(); 4428 4429 if (rc) 4430 goto out; 4431 4432 c = (font.width+7)/8 * 32 * font.charcount; 4433 4434 if (op->data && font.charcount > op->charcount) 4435 rc = -ENOSPC; 4436 if (!(op->flags & KD_FONT_FLAG_OLD)) { 4437 if (font.width > op->width || font.height > op->height) 4438 rc = -ENOSPC; 4439 } else { 4440 if (font.width != 8) 4441 rc = -EIO; 4442 else if ((op->height && font.height > op->height) || 4443 font.height > 32) 4444 rc = -ENOSPC; 4445 } 4446 if (rc) 4447 goto out; 4448 4449 op->height = font.height; 4450 op->width = font.width; 4451 op->charcount = font.charcount; 4452 4453 if (op->data && copy_to_user(op->data, font.data, c)) 4454 rc = -EFAULT; 4455 4456 out: 4457 kfree(font.data); 4458 return rc; 4459 } 4460 4461 static int con_font_set(struct vc_data *vc, struct console_font_op *op) 4462 { 4463 struct console_font font; 4464 int rc = -EINVAL; 4465 int size; 4466 4467 if (vc->vc_mode != KD_TEXT) 4468 return -EINVAL; 4469 if (!op->data) 4470 return -EINVAL; 4471 if (op->charcount > 512) 4472 return -EINVAL; 4473 if (op->width <= 0 || op->width > 32 || op->height > 32) 4474 return -EINVAL; 4475 size = (op->width+7)/8 * 32 * op->charcount; 4476 if (size > max_font_size) 4477 return -ENOSPC; 4478 4479 font.data = memdup_user(op->data, size); 4480 if (IS_ERR(font.data)) 4481 return PTR_ERR(font.data); 4482 4483 if (!op->height) { /* Need to guess font height [compat] */ 4484 int h, i; 4485 u8 *charmap = font.data; 4486 4487 /* 4488 * If from KDFONTOP ioctl, don't allow things which can be done 4489 * in userland,so that we can get rid of this soon 4490 */ 4491 if (!(op->flags & KD_FONT_FLAG_OLD)) { 4492 kfree(font.data); 4493 return -EINVAL; 4494 } 4495 4496 for (h = 32; h > 0; h--) 4497 for (i = 0; i < op->charcount; i++) 4498 if (charmap[32*i+h-1]) 4499 goto nonzero; 4500 4501 kfree(font.data); 4502 return -EINVAL; 4503 4504 nonzero: 4505 op->height = h; 4506 } 4507 4508 font.charcount = op->charcount; 4509 font.width = op->width; 4510 font.height = op->height; 4511 4512 console_lock(); 4513 if (vc->vc_mode != KD_TEXT) 4514 rc = -EINVAL; 4515 else if (vc->vc_sw->con_font_set) 4516 rc = vc->vc_sw->con_font_set(vc, &font, op->flags); 4517 else 4518 rc = -ENOSYS; 4519 console_unlock(); 4520 kfree(font.data); 4521 return rc; 4522 } 4523 4524 static int con_font_default(struct vc_data *vc, struct console_font_op *op) 4525 { 4526 struct console_font font = {.width = op->width, .height = op->height}; 4527 char name[MAX_FONT_NAME]; 4528 char *s = name; 4529 int rc; 4530 4531 4532 if (!op->data) 4533 s = NULL; 4534 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0) 4535 return -EFAULT; 4536 else 4537 name[MAX_FONT_NAME - 1] = 0; 4538 4539 console_lock(); 4540 if (vc->vc_mode != KD_TEXT) { 4541 console_unlock(); 4542 return -EINVAL; 4543 } 4544 if (vc->vc_sw->con_font_default) 4545 rc = vc->vc_sw->con_font_default(vc, &font, s); 4546 else 4547 rc = -ENOSYS; 4548 console_unlock(); 4549 if (!rc) { 4550 op->width = font.width; 4551 op->height = font.height; 4552 } 4553 return rc; 4554 } 4555 4556 static int con_font_copy(struct vc_data *vc, struct console_font_op *op) 4557 { 4558 int con = op->height; 4559 int rc; 4560 4561 4562 console_lock(); 4563 if (vc->vc_mode != KD_TEXT) 4564 rc = -EINVAL; 4565 else if (!vc->vc_sw->con_font_copy) 4566 rc = -ENOSYS; 4567 else if (con < 0 || !vc_cons_allocated(con)) 4568 rc = -ENOTTY; 4569 else if (con == vc->vc_num) /* nothing to do */ 4570 rc = 0; 4571 else 4572 rc = vc->vc_sw->con_font_copy(vc, con); 4573 console_unlock(); 4574 return rc; 4575 } 4576 4577 int con_font_op(struct vc_data *vc, struct console_font_op *op) 4578 { 4579 switch (op->op) { 4580 case KD_FONT_OP_SET: 4581 return con_font_set(vc, op); 4582 case KD_FONT_OP_GET: 4583 return con_font_get(vc, op); 4584 case KD_FONT_OP_SET_DEFAULT: 4585 return con_font_default(vc, op); 4586 case KD_FONT_OP_COPY: 4587 return con_font_copy(vc, op); 4588 } 4589 return -ENOSYS; 4590 } 4591 4592 /* 4593 * Interface exported to selection and vcs. 4594 */ 4595 4596 /* used by selection */ 4597 u16 screen_glyph(struct vc_data *vc, int offset) 4598 { 4599 u16 w = scr_readw(screenpos(vc, offset, 1)); 4600 u16 c = w & 0xff; 4601 4602 if (w & vc->vc_hi_font_mask) 4603 c |= 0x100; 4604 return c; 4605 } 4606 EXPORT_SYMBOL_GPL(screen_glyph); 4607 4608 u32 screen_glyph_unicode(struct vc_data *vc, int n) 4609 { 4610 struct uni_screen *uniscr = get_vc_uniscr(vc); 4611 4612 if (uniscr) 4613 return uniscr->lines[n / vc->vc_cols][n % vc->vc_cols]; 4614 return inverse_translate(vc, screen_glyph(vc, n * 2), 1); 4615 } 4616 EXPORT_SYMBOL_GPL(screen_glyph_unicode); 4617 4618 /* used by vcs - note the word offset */ 4619 unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed) 4620 { 4621 return screenpos(vc, 2 * w_offset, viewed); 4622 } 4623 EXPORT_SYMBOL_GPL(screen_pos); 4624 4625 void getconsxy(struct vc_data *vc, unsigned char *p) 4626 { 4627 /* clamp values if they don't fit */ 4628 p[0] = min(vc->vc_x, 0xFFu); 4629 p[1] = min(vc->vc_y, 0xFFu); 4630 } 4631 4632 void putconsxy(struct vc_data *vc, unsigned char *p) 4633 { 4634 hide_cursor(vc); 4635 gotoxy(vc, p[0], p[1]); 4636 set_cursor(vc); 4637 } 4638 4639 u16 vcs_scr_readw(struct vc_data *vc, const u16 *org) 4640 { 4641 if ((unsigned long)org == vc->vc_pos && softcursor_original != -1) 4642 return softcursor_original; 4643 return scr_readw(org); 4644 } 4645 4646 void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org) 4647 { 4648 scr_writew(val, org); 4649 if ((unsigned long)org == vc->vc_pos) { 4650 softcursor_original = -1; 4651 add_softcursor(vc); 4652 } 4653 } 4654 4655 void vcs_scr_updated(struct vc_data *vc) 4656 { 4657 notify_update(vc); 4658 } 4659 4660 void vc_scrolldelta_helper(struct vc_data *c, int lines, 4661 unsigned int rolled_over, void *base, unsigned int size) 4662 { 4663 unsigned long ubase = (unsigned long)base; 4664 ptrdiff_t scr_end = (void *)c->vc_scr_end - base; 4665 ptrdiff_t vorigin = (void *)c->vc_visible_origin - base; 4666 ptrdiff_t origin = (void *)c->vc_origin - base; 4667 int margin = c->vc_size_row * 4; 4668 int from, wrap, from_off, avail; 4669 4670 /* Turn scrollback off */ 4671 if (!lines) { 4672 c->vc_visible_origin = c->vc_origin; 4673 return; 4674 } 4675 4676 /* Do we have already enough to allow jumping from 0 to the end? */ 4677 if (rolled_over > scr_end + margin) { 4678 from = scr_end; 4679 wrap = rolled_over + c->vc_size_row; 4680 } else { 4681 from = 0; 4682 wrap = size; 4683 } 4684 4685 from_off = (vorigin - from + wrap) % wrap + lines * c->vc_size_row; 4686 avail = (origin - from + wrap) % wrap; 4687 4688 /* Only a little piece would be left? Show all incl. the piece! */ 4689 if (avail < 2 * margin) 4690 margin = 0; 4691 if (from_off < margin) 4692 from_off = 0; 4693 if (from_off > avail - margin) 4694 from_off = avail; 4695 4696 c->vc_visible_origin = ubase + (from + from_off) % wrap; 4697 } 4698 EXPORT_SYMBOL_GPL(vc_scrolldelta_helper); 4699 4700 /* 4701 * Visible symbols for modules 4702 */ 4703 4704 EXPORT_SYMBOL(color_table); 4705 EXPORT_SYMBOL(default_red); 4706 EXPORT_SYMBOL(default_grn); 4707 EXPORT_SYMBOL(default_blu); 4708 EXPORT_SYMBOL(update_region); 4709 EXPORT_SYMBOL(redraw_screen); 4710 EXPORT_SYMBOL(vc_resize); 4711 EXPORT_SYMBOL(fg_console); 4712 EXPORT_SYMBOL(console_blank_hook); 4713 EXPORT_SYMBOL(console_blanked); 4714 EXPORT_SYMBOL(vc_cons); 4715 EXPORT_SYMBOL(global_cursor_default); 4716 #ifndef VT_SINGLE_DRIVER 4717 EXPORT_SYMBOL(give_up_console); 4718 #endif 4719