1/* 2 * linux/drivers/char/vt.c 3 * 4 * Copyright (C) 1991, 1992 Linus Torvalds 5 */ 6 7/* 8 * Hopefully this will be a rather complete VT102 implementation. 9 * 10 * Beeping thanks to John T Kohl. 11 * 12 * Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics 13 * Chars, and VT100 enhancements by Peter MacDonald. 14 * 15 * Copy and paste function by Andrew Haylett, 16 * some enhancements by Alessandro Rubini. 17 * 18 * Code to check for different video-cards mostly by Galen Hunt, 19 * <g-hunt@ee.utah.edu> 20 * 21 * Rudimentary ISO 10646/Unicode/UTF-8 character set support by 22 * Markus Kuhn, <mskuhn@immd4.informatik.uni-erlangen.de>. 23 * 24 * Dynamic allocation of consoles, aeb@cwi.nl, May 1994 25 * Resizing of consoles, aeb, 940926 26 * 27 * Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94 28 * <poe@daimi.aau.dk> 29 * 30 * User-defined bell sound, new setterm control sequences and printk 31 * redirection by Martin Mares <mj@k332.feld.cvut.cz> 19-Nov-95 32 * 33 * APM screenblank bug fixed Takashi Manabe <manabe@roy.dsl.tutics.tut.jp> 34 * 35 * Merge with the abstract console driver by Geert Uytterhoeven 36 * <geert@linux-m68k.org>, Jan 1997. 37 * 38 * Original m68k console driver modifications by 39 * 40 * - Arno Griffioen <arno@usn.nl> 41 * - David Carter <carter@cs.bris.ac.uk> 42 * 43 * The abstract console driver provides a generic interface for a text 44 * console. It supports VGA text mode, frame buffer based graphical consoles 45 * and special graphics processors that are only accessible through some 46 * registers (e.g. a TMS340x0 GSP). 47 * 48 * The interface to the hardware is specified using a special structure 49 * (struct consw) which contains function pointers to console operations 50 * (see <linux/console.h> for more information). 51 * 52 * Support for changeable cursor shape 53 * by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997 54 * 55 * Ported to i386 and con_scrolldelta fixed 56 * by Emmanuel Marty <core@ggi-project.org>, April 1998 57 * 58 * Resurrected character buffers in videoram plus lots of other trickery 59 * by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998 60 * 61 * Removed old-style timers, introduced console_timer, made timer 62 * deletion SMP-safe. 17Jun00, Andrew Morton <andrewm@uow.edu.au> 63 * 64 * Removed console_lock, enabled interrupts across all console operations 65 * 13 March 2001, Andrew Morton 66 * 67 * Fixed UTF-8 mode so alternate charset modes always work according 68 * to control sequences interpreted in do_con_trol function 69 * preserving backward VT100 semigraphics compatibility, 70 * malformed UTF sequences represented as sequences of replacement glyphs, 71 * original codes or '?' as a last resort if replacement glyph is undefined 72 * by Adam Tla/lka <atlka@pg.gda.pl>, Aug 2006 73 */ 74 75#include <linux/module.h> 76#include <linux/types.h> 77#include <linux/sched.h> 78#include <linux/tty.h> 79#include <linux/tty_flip.h> 80#include <linux/kernel.h> 81#include <linux/string.h> 82#include <linux/errno.h> 83#include <linux/kd.h> 84#include <linux/slab.h> 85#include <linux/major.h> 86#include <linux/mm.h> 87#include <linux/console.h> 88#include <linux/init.h> 89#include <linux/mutex.h> 90#include <linux/vt_kern.h> 91#include <linux/selection.h> 92#include <linux/tiocl.h> 93#include <linux/kbd_kern.h> 94#include <linux/consolemap.h> 95#include <linux/timer.h> 96#include <linux/interrupt.h> 97#include <linux/workqueue.h> 98#include <linux/bootmem.h> 99#include <linux/pm.h> 100#include <linux/font.h> 101#include <linux/bitops.h> 102 103#include <asm/io.h> 104#include <asm/system.h> 105#include <asm/uaccess.h> 106 107#define MAX_NR_CON_DRIVER 16 108 109#define CON_DRIVER_FLAG_MODULE 1 110#define CON_DRIVER_FLAG_INIT 2 111#define CON_DRIVER_FLAG_ATTR 4 112 113struct con_driver { 114 const struct consw *con; 115 const char *desc; 116 struct device *dev; 117 int node; 118 int first; 119 int last; 120 int flag; 121}; 122 123static struct con_driver registered_con_driver[MAX_NR_CON_DRIVER]; 124const struct consw *conswitchp; 125 126/* A bitmap for codes <32. A bit of 1 indicates that the code 127 * corresponding to that bit number invokes some special action 128 * (such as cursor movement) and should not be displayed as a 129 * glyph unless the disp_ctrl mode is explicitly enabled. 130 */ 131#define CTRL_ACTION 0x0d00ff81 132#define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */ 133 134/* 135 * Here is the default bell parameters: 750HZ, 1/8th of a second 136 */ 137#define DEFAULT_BELL_PITCH 750 138#define DEFAULT_BELL_DURATION (HZ/8) 139 140struct vc vc_cons [MAX_NR_CONSOLES]; 141 142#ifndef VT_SINGLE_DRIVER 143static const struct consw *con_driver_map[MAX_NR_CONSOLES]; 144#endif 145 146static int con_open(struct tty_struct *, struct file *); 147static void vc_init(struct vc_data *vc, unsigned int rows, 148 unsigned int cols, int do_clear); 149static void gotoxy(struct vc_data *vc, int new_x, int new_y); 150static void save_cur(struct vc_data *vc); 151static void reset_terminal(struct vc_data *vc, int do_clear); 152static void con_flush_chars(struct tty_struct *tty); 153static int set_vesa_blanking(char __user *p); 154static void set_cursor(struct vc_data *vc); 155static void hide_cursor(struct vc_data *vc); 156static void console_callback(struct work_struct *ignored); 157static void blank_screen_t(unsigned long dummy); 158static void set_palette(struct vc_data *vc); 159 160static int printable; /* Is console ready for printing? */ 161static int default_utf8; 162module_param(default_utf8, int, S_IRUGO | S_IWUSR); 163 164/* 165 * ignore_poke: don't unblank the screen when things are typed. This is 166 * mainly for the privacy of braille terminal users. 167 */ 168static int ignore_poke; 169 170int do_poke_blanked_console; 171int console_blanked; 172 173static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */ 174static int blankinterval = 10*60*HZ; 175static int vesa_off_interval; 176 177static DECLARE_WORK(console_work, console_callback); 178 179/* 180 * fg_console is the current virtual console, 181 * last_console is the last used one, 182 * want_console is the console we want to switch to, 183 * kmsg_redirect is the console for kernel messages, 184 */ 185int fg_console; 186int last_console; 187int want_console = -1; 188int kmsg_redirect; 189 190/* 191 * For each existing display, we have a pointer to console currently visible 192 * on that display, allowing consoles other than fg_console to be refreshed 193 * appropriately. Unless the low-level driver supplies its own display_fg 194 * variable, we use this one for the "master display". 195 */ 196static struct vc_data *master_display_fg; 197 198/* 199 * Unfortunately, we need to delay tty echo when we're currently writing to the 200 * console since the code is (and always was) not re-entrant, so we schedule 201 * all flip requests to process context with schedule-task() and run it from 202 * console_callback(). 203 */ 204 205/* 206 * For the same reason, we defer scrollback to the console callback. 207 */ 208static int scrollback_delta; 209 210/* 211 * Hook so that the power management routines can (un)blank 212 * the console on our behalf. 213 */ 214int (*console_blank_hook)(int); 215 216static DEFINE_TIMER(console_timer, blank_screen_t, 0, 0); 217static int blank_state; 218static int blank_timer_expired; 219enum { 220 blank_off = 0, 221 blank_normal_wait, 222 blank_vesa_wait, 223}; 224 225/* 226 * Low-Level Functions 227 */ 228 229#define IS_FG(vc) ((vc)->vc_num == fg_console) 230 231#ifdef VT_BUF_VRAM_ONLY 232#define DO_UPDATE(vc) 0 233#else 234#define DO_UPDATE(vc) CON_IS_VISIBLE(vc) 235#endif 236 237static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed) 238{ 239 unsigned short *p; 240 241 if (!viewed) 242 p = (unsigned short *)(vc->vc_origin + offset); 243 else if (!vc->vc_sw->con_screen_pos) 244 p = (unsigned short *)(vc->vc_visible_origin + offset); 245 else 246 p = vc->vc_sw->con_screen_pos(vc, offset); 247 return p; 248} 249 250static inline void scrolldelta(int lines) 251{ 252 scrollback_delta += lines; 253 schedule_console_callback(); 254} 255 256void schedule_console_callback(void) 257{ 258 schedule_work(&console_work); 259} 260 261static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr) 262{ 263 unsigned short *d, *s; 264 265 if (t+nr >= b) 266 nr = b - t - 1; 267 if (b > vc->vc_rows || t >= b || nr < 1) 268 return; 269 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr)) 270 return; 271 d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t); 272 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr)); 273 scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row); 274 scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_video_erase_char, 275 vc->vc_size_row * nr); 276} 277 278static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr) 279{ 280 unsigned short *s; 281 unsigned int step; 282 283 if (t+nr >= b) 284 nr = b - t - 1; 285 if (b > vc->vc_rows || t >= b || nr < 1) 286 return; 287 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr)) 288 return; 289 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t); 290 step = vc->vc_cols * nr; 291 scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row); 292 scr_memsetw(s, vc->vc_video_erase_char, 2 * step); 293} 294 295static void do_update_region(struct vc_data *vc, unsigned long start, int count) 296{ 297#ifndef VT_BUF_VRAM_ONLY 298 unsigned int xx, yy, offset; 299 u16 *p; 300 301 p = (u16 *) start; 302 if (!vc->vc_sw->con_getxy) { 303 offset = (start - vc->vc_origin) / 2; 304 xx = offset % vc->vc_cols; 305 yy = offset / vc->vc_cols; 306 } else { 307 int nxx, nyy; 308 start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy); 309 xx = nxx; yy = nyy; 310 } 311 for(;;) { 312 u16 attrib = scr_readw(p) & 0xff00; 313 int startx = xx; 314 u16 *q = p; 315 while (xx < vc->vc_cols && count) { 316 if (attrib != (scr_readw(p) & 0xff00)) { 317 if (p > q) 318 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx); 319 startx = xx; 320 q = p; 321 attrib = scr_readw(p) & 0xff00; 322 } 323 p++; 324 xx++; 325 count--; 326 } 327 if (p > q) 328 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx); 329 if (!count) 330 break; 331 xx = 0; 332 yy++; 333 if (vc->vc_sw->con_getxy) { 334 p = (u16 *)start; 335 start = vc->vc_sw->con_getxy(vc, start, NULL, NULL); 336 } 337 } 338#endif 339} 340 341void update_region(struct vc_data *vc, unsigned long start, int count) 342{ 343 WARN_CONSOLE_UNLOCKED(); 344 345 if (DO_UPDATE(vc)) { 346 hide_cursor(vc); 347 do_update_region(vc, start, count); 348 set_cursor(vc); 349 } 350} 351 352/* Structure of attributes is hardware-dependent */ 353 354static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink, 355 u8 _underline, u8 _reverse, u8 _italic) 356{ 357 if (vc->vc_sw->con_build_attr) 358 return vc->vc_sw->con_build_attr(vc, _color, _intensity, 359 _blink, _underline, _reverse, _italic); 360 361#ifndef VT_BUF_VRAM_ONLY 362/* 363 * ++roman: I completely changed the attribute format for monochrome 364 * mode (!can_do_color). The formerly used MDA (monochrome display 365 * adapter) format didn't allow the combination of certain effects. 366 * Now the attribute is just a bit vector: 367 * Bit 0..1: intensity (0..2) 368 * Bit 2 : underline 369 * Bit 3 : reverse 370 * Bit 7 : blink 371 */ 372 { 373 u8 a = vc->vc_color; 374 if (!vc->vc_can_do_color) 375 return _intensity | 376 (_italic ? 2 : 0) | 377 (_underline ? 4 : 0) | 378 (_reverse ? 8 : 0) | 379 (_blink ? 0x80 : 0); 380 if (_italic) 381 a = (a & 0xF0) | vc->vc_itcolor; 382 else if (_underline) 383 a = (a & 0xf0) | vc->vc_ulcolor; 384 else if (_intensity == 0) 385 a = (a & 0xf0) | vc->vc_ulcolor; 386 if (_reverse) 387 a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77); 388 if (_blink) 389 a ^= 0x80; 390 if (_intensity == 2) 391 a ^= 0x08; 392 if (vc->vc_hi_font_mask == 0x100) 393 a <<= 1; 394 return a; 395 } 396#else 397 return 0; 398#endif 399} 400 401static void update_attr(struct vc_data *vc) 402{ 403 vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity, 404 vc->vc_blink, vc->vc_underline, 405 vc->vc_reverse ^ vc->vc_decscnm, vc->vc_italic); 406 vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm, 0) << 8) | ' '; 407} 408 409/* Note: inverting the screen twice should revert to the original state */ 410void invert_screen(struct vc_data *vc, int offset, int count, int viewed) 411{ 412 unsigned short *p; 413 414 WARN_CONSOLE_UNLOCKED(); 415 416 count /= 2; 417 p = screenpos(vc, offset, viewed); 418 if (vc->vc_sw->con_invert_region) 419 vc->vc_sw->con_invert_region(vc, p, count); 420#ifndef VT_BUF_VRAM_ONLY 421 else { 422 u16 *q = p; 423 int cnt = count; 424 u16 a; 425 426 if (!vc->vc_can_do_color) { 427 while (cnt--) { 428 a = scr_readw(q); 429 a ^= 0x0800; 430 scr_writew(a, q); 431 q++; 432 } 433 } else if (vc->vc_hi_font_mask == 0x100) { 434 while (cnt--) { 435 a = scr_readw(q); 436 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4); 437 scr_writew(a, q); 438 q++; 439 } 440 } else { 441 while (cnt--) { 442 a = scr_readw(q); 443 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4); 444 scr_writew(a, q); 445 q++; 446 } 447 } 448 } 449#endif 450 if (DO_UPDATE(vc)) 451 do_update_region(vc, (unsigned long) p, count); 452} 453 454/* used by selection: complement pointer position */ 455void complement_pos(struct vc_data *vc, int offset) 456{ 457 static int old_offset = -1; 458 static unsigned short old; 459 static unsigned short oldx, oldy; 460 461 WARN_CONSOLE_UNLOCKED(); 462 463 if (old_offset != -1 && old_offset >= 0 && 464 old_offset < vc->vc_screenbuf_size) { 465 scr_writew(old, screenpos(vc, old_offset, 1)); 466 if (DO_UPDATE(vc)) 467 vc->vc_sw->con_putc(vc, old, oldy, oldx); 468 } 469 470 old_offset = offset; 471 472 if (offset != -1 && offset >= 0 && 473 offset < vc->vc_screenbuf_size) { 474 unsigned short new; 475 unsigned short *p; 476 p = screenpos(vc, offset, 1); 477 old = scr_readw(p); 478 new = old ^ vc->vc_complement_mask; 479 scr_writew(new, p); 480 if (DO_UPDATE(vc)) { 481 oldx = (offset >> 1) % vc->vc_cols; 482 oldy = (offset >> 1) / vc->vc_cols; 483 vc->vc_sw->con_putc(vc, new, oldy, oldx); 484 } 485 } 486 487} 488 489static void insert_char(struct vc_data *vc, unsigned int nr) 490{ 491 unsigned short *p, *q = (unsigned short *)vc->vc_pos; 492 493 p = q + vc->vc_cols - nr - vc->vc_x; 494 while (--p >= q) 495 scr_writew(scr_readw(p), p + nr); 496 scr_memsetw(q, vc->vc_video_erase_char, nr * 2); 497 vc->vc_need_wrap = 0; 498 if (DO_UPDATE(vc)) { 499 unsigned short oldattr = vc->vc_attr; 500 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x, vc->vc_y, vc->vc_x + nr, 1, 501 vc->vc_cols - vc->vc_x - nr); 502 vc->vc_attr = vc->vc_video_erase_char >> 8; 503 while (nr--) 504 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y, vc->vc_x + nr); 505 vc->vc_attr = oldattr; 506 } 507} 508 509static void delete_char(struct vc_data *vc, unsigned int nr) 510{ 511 unsigned int i = vc->vc_x; 512 unsigned short *p = (unsigned short *)vc->vc_pos; 513 514 while (++i <= vc->vc_cols - nr) { 515 scr_writew(scr_readw(p+nr), p); 516 p++; 517 } 518 scr_memsetw(p, vc->vc_video_erase_char, nr * 2); 519 vc->vc_need_wrap = 0; 520 if (DO_UPDATE(vc)) { 521 unsigned short oldattr = vc->vc_attr; 522 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x + nr, vc->vc_y, vc->vc_x, 1, 523 vc->vc_cols - vc->vc_x - nr); 524 vc->vc_attr = vc->vc_video_erase_char >> 8; 525 while (nr--) 526 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y, 527 vc->vc_cols - 1 - nr); 528 vc->vc_attr = oldattr; 529 } 530} 531 532static int softcursor_original; 533 534static void add_softcursor(struct vc_data *vc) 535{ 536 int i = scr_readw((u16 *) vc->vc_pos); 537 u32 type = vc->vc_cursor_type; 538 539 if (! (type & 0x10)) return; 540 if (softcursor_original != -1) return; 541 softcursor_original = i; 542 i |= ((type >> 8) & 0xff00 ); 543 i ^= ((type) & 0xff00 ); 544 if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000; 545 if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700; 546 scr_writew(i, (u16 *) vc->vc_pos); 547 if (DO_UPDATE(vc)) 548 vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x); 549} 550 551static void hide_softcursor(struct vc_data *vc) 552{ 553 if (softcursor_original != -1) { 554 scr_writew(softcursor_original, (u16 *)vc->vc_pos); 555 if (DO_UPDATE(vc)) 556 vc->vc_sw->con_putc(vc, softcursor_original, 557 vc->vc_y, vc->vc_x); 558 softcursor_original = -1; 559 } 560} 561 562static void hide_cursor(struct vc_data *vc) 563{ 564 if (vc == sel_cons) 565 clear_selection(); 566 vc->vc_sw->con_cursor(vc, CM_ERASE); 567 hide_softcursor(vc); 568} 569 570static void set_cursor(struct vc_data *vc) 571{ 572 if (!IS_FG(vc) || console_blanked || 573 vc->vc_mode == KD_GRAPHICS) 574 return; 575 if (vc->vc_deccm) { 576 if (vc == sel_cons) 577 clear_selection(); 578 add_softcursor(vc); 579 if ((vc->vc_cursor_type & 0x0f) != 1) 580 vc->vc_sw->con_cursor(vc, CM_DRAW); 581 } else 582 hide_cursor(vc); 583} 584 585static void set_origin(struct vc_data *vc) 586{ 587 WARN_CONSOLE_UNLOCKED(); 588 589 if (!CON_IS_VISIBLE(vc) || 590 !vc->vc_sw->con_set_origin || 591 !vc->vc_sw->con_set_origin(vc)) 592 vc->vc_origin = (unsigned long)vc->vc_screenbuf; 593 vc->vc_visible_origin = vc->vc_origin; 594 vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size; 595 vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x; 596} 597 598static inline void save_screen(struct vc_data *vc) 599{ 600 WARN_CONSOLE_UNLOCKED(); 601 602 if (vc->vc_sw->con_save_screen) 603 vc->vc_sw->con_save_screen(vc); 604} 605 606/* 607 * Redrawing of screen 608 */ 609 610static void clear_buffer_attributes(struct vc_data *vc) 611{ 612 unsigned short *p = (unsigned short *)vc->vc_origin; 613 int count = vc->vc_screenbuf_size / 2; 614 int mask = vc->vc_hi_font_mask | 0xff; 615 616 for (; count > 0; count--, p++) { 617 scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p); 618 } 619} 620 621void redraw_screen(struct vc_data *vc, int is_switch) 622{ 623 int redraw = 0; 624 625 WARN_CONSOLE_UNLOCKED(); 626 627 if (!vc) { 628 /* strange ... */ 629 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */ 630 return; 631 } 632 633 if (is_switch) { 634 struct vc_data *old_vc = vc_cons[fg_console].d; 635 if (old_vc == vc) 636 return; 637 if (!CON_IS_VISIBLE(vc)) 638 redraw = 1; 639 *vc->vc_display_fg = vc; 640 fg_console = vc->vc_num; 641 hide_cursor(old_vc); 642 if (!CON_IS_VISIBLE(old_vc)) { 643 save_screen(old_vc); 644 set_origin(old_vc); 645 } 646 } else { 647 hide_cursor(vc); 648 redraw = 1; 649 } 650 651 if (redraw) { 652 int update; 653 int old_was_color = vc->vc_can_do_color; 654 655 set_origin(vc); 656 update = vc->vc_sw->con_switch(vc); 657 set_palette(vc); 658 /* 659 * If console changed from mono<->color, the best we can do 660 * is to clear the buffer attributes. As it currently stands, 661 * rebuilding new attributes from the old buffer is not doable 662 * without overly complex code. 663 */ 664 if (old_was_color != vc->vc_can_do_color) { 665 update_attr(vc); 666 clear_buffer_attributes(vc); 667 } 668 if (update && vc->vc_mode != KD_GRAPHICS) 669 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2); 670 } 671 set_cursor(vc); 672 if (is_switch) { 673 set_leds(); 674 compute_shiftstate(); 675 } 676} 677 678/* 679 * Allocation, freeing and resizing of VTs. 680 */ 681 682int vc_cons_allocated(unsigned int i) 683{ 684 return (i < MAX_NR_CONSOLES && vc_cons[i].d); 685} 686 687static void visual_init(struct vc_data *vc, int num, int init) 688{ 689 /* ++Geert: vc->vc_sw->con_init determines console size */ 690 if (vc->vc_sw) 691 module_put(vc->vc_sw->owner); 692 vc->vc_sw = conswitchp; 693#ifndef VT_SINGLE_DRIVER 694 if (con_driver_map[num]) 695 vc->vc_sw = con_driver_map[num]; 696#endif 697 __module_get(vc->vc_sw->owner); 698 vc->vc_num = num; 699 vc->vc_display_fg = &master_display_fg; 700 vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir; 701 vc->vc_uni_pagedir = 0; 702 vc->vc_hi_font_mask = 0; 703 vc->vc_complement_mask = 0; 704 vc->vc_can_do_color = 0; 705 vc->vc_sw->con_init(vc, init); 706 if (!vc->vc_complement_mask) 707 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 708 vc->vc_s_complement_mask = vc->vc_complement_mask; 709 vc->vc_size_row = vc->vc_cols << 1; 710 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row; 711} 712 713int vc_allocate(unsigned int currcons) /* return 0 on success */ 714{ 715 WARN_CONSOLE_UNLOCKED(); 716 717 if (currcons >= MAX_NR_CONSOLES) 718 return -ENXIO; 719 if (!vc_cons[currcons].d) { 720 struct vc_data *vc; 721 722 /* prevent users from taking too much memory */ 723 if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE)) 724 return -EPERM; 725 726 /* due to the granularity of kmalloc, we waste some memory here */ 727 /* the alloc is done in two steps, to optimize the common situation 728 of a 25x80 console (structsize=216, screenbuf_size=4000) */ 729 /* although the numbers above are not valid since long ago, the 730 point is still up-to-date and the comment still has its value 731 even if only as a historical artifact. --mj, July 1998 */ 732 vc = kmalloc(sizeof(struct vc_data), GFP_KERNEL); 733 if (!vc) 734 return -ENOMEM; 735 memset(vc, 0, sizeof(*vc)); 736 vc_cons[currcons].d = vc; 737 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK); 738 visual_init(vc, currcons, 1); 739 if (!*vc->vc_uni_pagedir_loc) 740 con_set_default_unimap(vc); 741 if (!vc->vc_kmalloced) 742 vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL); 743 if (!vc->vc_screenbuf) { 744 kfree(vc); 745 vc_cons[currcons].d = NULL; 746 return -ENOMEM; 747 } 748 vc->vc_kmalloced = 1; 749 vc_init(vc, vc->vc_rows, vc->vc_cols, 1); 750 } 751 return 0; 752} 753 754static inline int resize_screen(struct vc_data *vc, int width, int height) 755{ 756 /* Resizes the resolution of the display adapater */ 757 int err = 0; 758 759 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize) 760 err = vc->vc_sw->con_resize(vc, width, height); 761 return err; 762} 763 764/* 765 * Change # of rows and columns (0 means unchanged/the size of fg_console) 766 * [this is to be used together with some user program 767 * like resize that changes the hardware videomode] 768 */ 769#define VC_RESIZE_MAXCOL (32767) 770#define VC_RESIZE_MAXROW (32767) 771int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int lines) 772{ 773 unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0; 774 unsigned int old_cols, old_rows, old_row_size, old_screen_size; 775 unsigned int new_cols, new_rows, new_row_size, new_screen_size; 776 unsigned int end; 777 unsigned short *newscreen; 778 779 WARN_CONSOLE_UNLOCKED(); 780 781 if (!vc) 782 return -ENXIO; 783 784 if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW) 785 return -EINVAL; 786 787 new_cols = (cols ? cols : vc->vc_cols); 788 new_rows = (lines ? lines : vc->vc_rows); 789 new_row_size = new_cols << 1; 790 new_screen_size = new_row_size * new_rows; 791 792 if (new_cols == vc->vc_cols && new_rows == vc->vc_rows) 793 return 0; 794 795 newscreen = kmalloc(new_screen_size, GFP_USER); 796 if (!newscreen) 797 return -ENOMEM; 798 799 old_rows = vc->vc_rows; 800 old_cols = vc->vc_cols; 801 old_row_size = vc->vc_size_row; 802 old_screen_size = vc->vc_screenbuf_size; 803 804 err = resize_screen(vc, new_cols, new_rows); 805 if (err) { 806 kfree(newscreen); 807 return err; 808 } 809 810 vc->vc_rows = new_rows; 811 vc->vc_cols = new_cols; 812 vc->vc_size_row = new_row_size; 813 vc->vc_screenbuf_size = new_screen_size; 814 815 rlth = min(old_row_size, new_row_size); 816 rrem = new_row_size - rlth; 817 old_origin = vc->vc_origin; 818 new_origin = (long) newscreen; 819 new_scr_end = new_origin + new_screen_size; 820 821 if (vc->vc_y > new_rows) { 822 if (old_rows - vc->vc_y < new_rows) { 823 /* 824 * Cursor near the bottom, copy contents from the 825 * bottom of buffer 826 */ 827 old_origin += (old_rows - new_rows) * old_row_size; 828 end = vc->vc_scr_end; 829 } else { 830 /* 831 * Cursor is in no man's land, copy 1/2 screenful 832 * from the top and bottom of cursor position 833 */ 834 old_origin += (vc->vc_y - new_rows/2) * old_row_size; 835 end = old_origin + (old_row_size * new_rows); 836 } 837 } else 838 /* 839 * Cursor near the top, copy contents from the top of buffer 840 */ 841 end = (old_rows > new_rows) ? old_origin + 842 (old_row_size * new_rows) : 843 vc->vc_scr_end; 844 845 update_attr(vc); 846 847 while (old_origin < end) { 848 scr_memcpyw((unsigned short *) new_origin, 849 (unsigned short *) old_origin, rlth); 850 if (rrem) 851 scr_memsetw((void *)(new_origin + rlth), 852 vc->vc_video_erase_char, rrem); 853 old_origin += old_row_size; 854 new_origin += new_row_size; 855 } 856 if (new_scr_end > new_origin) 857 scr_memsetw((void *)new_origin, vc->vc_video_erase_char, 858 new_scr_end - new_origin); 859 if (vc->vc_kmalloced) 860 kfree(vc->vc_screenbuf); 861 vc->vc_screenbuf = newscreen; 862 vc->vc_kmalloced = 1; 863 vc->vc_screenbuf_size = new_screen_size; 864 set_origin(vc); 865 866 /* do part of a reset_terminal() */ 867 vc->vc_top = 0; 868 vc->vc_bottom = vc->vc_rows; 869 gotoxy(vc, vc->vc_x, vc->vc_y); 870 save_cur(vc); 871 872 if (vc->vc_tty) { 873 struct winsize ws, *cws = &vc->vc_tty->winsize; 874 875 memset(&ws, 0, sizeof(ws)); 876 ws.ws_row = vc->vc_rows; 877 ws.ws_col = vc->vc_cols; 878 ws.ws_ypixel = vc->vc_scan_lines; 879 if ((ws.ws_row != cws->ws_row || ws.ws_col != cws->ws_col) && 880 vc->vc_tty->pgrp) 881 kill_pgrp(vc->vc_tty->pgrp, SIGWINCH, 1); 882 *cws = ws; 883 } 884 885 if (CON_IS_VISIBLE(vc)) 886 update_screen(vc); 887 return err; 888} 889 890int vc_lock_resize(struct vc_data *vc, unsigned int cols, unsigned int lines) 891{ 892 int rc; 893 894 acquire_console_sem(); 895 rc = vc_resize(vc, cols, lines); 896 release_console_sem(); 897 return rc; 898} 899 900void vc_deallocate(unsigned int currcons) 901{ 902 WARN_CONSOLE_UNLOCKED(); 903 904 if (vc_cons_allocated(currcons)) { 905 struct vc_data *vc = vc_cons[currcons].d; 906 vc->vc_sw->con_deinit(vc); 907 put_pid(vc->vt_pid); 908 module_put(vc->vc_sw->owner); 909 if (vc->vc_kmalloced) 910 kfree(vc->vc_screenbuf); 911 if (currcons >= MIN_NR_CONSOLES) 912 kfree(vc); 913 vc_cons[currcons].d = NULL; 914 } 915} 916 917/* 918 * VT102 emulator 919 */ 920 921#define set_kbd(vc, x) set_vc_kbd_mode(kbd_table + (vc)->vc_num, (x)) 922#define clr_kbd(vc, x) clr_vc_kbd_mode(kbd_table + (vc)->vc_num, (x)) 923#define is_kbd(vc, x) vc_kbd_mode(kbd_table + (vc)->vc_num, (x)) 924 925#define decarm VC_REPEAT 926#define decckm VC_CKMODE 927#define kbdapplic VC_APPLIC 928#define lnm VC_CRLF 929 930/* 931 * this is what the terminal answers to a ESC-Z or csi0c query. 932 */ 933#define VT100ID "\033[?1;2c" 934#define VT102ID "\033[?6c" 935 936unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7, 937 8,12,10,14, 9,13,11,15 }; 938 939/* the default colour table, for VGA+ colour systems */ 940int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa, 941 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff}; 942int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa, 943 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff}; 944int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa, 945 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff}; 946 947module_param_array(default_red, int, NULL, S_IRUGO | S_IWUSR); 948module_param_array(default_grn, int, NULL, S_IRUGO | S_IWUSR); 949module_param_array(default_blu, int, NULL, S_IRUGO | S_IWUSR); 950 951/* 952 * gotoxy() must verify all boundaries, because the arguments 953 * might also be negative. If the given position is out of 954 * bounds, the cursor is placed at the nearest margin. 955 */ 956static void gotoxy(struct vc_data *vc, int new_x, int new_y) 957{ 958 int min_y, max_y; 959 960 if (new_x < 0) 961 vc->vc_x = 0; 962 else { 963 if (new_x >= vc->vc_cols) 964 vc->vc_x = vc->vc_cols - 1; 965 else 966 vc->vc_x = new_x; 967 } 968 969 if (vc->vc_decom) { 970 min_y = vc->vc_top; 971 max_y = vc->vc_bottom; 972 } else { 973 min_y = 0; 974 max_y = vc->vc_rows; 975 } 976 if (new_y < min_y) 977 vc->vc_y = min_y; 978 else if (new_y >= max_y) 979 vc->vc_y = max_y - 1; 980 else 981 vc->vc_y = new_y; 982 vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1); 983 vc->vc_need_wrap = 0; 984} 985 986/* for absolute user moves, when decom is set */ 987static void gotoxay(struct vc_data *vc, int new_x, int new_y) 988{ 989 gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y); 990} 991 992void scrollback(struct vc_data *vc, int lines) 993{ 994 if (!lines) 995 lines = vc->vc_rows / 2; 996 scrolldelta(-lines); 997} 998 999void scrollfront(struct vc_data *vc, int lines) 1000{ 1001 if (!lines) 1002 lines = vc->vc_rows / 2; 1003 scrolldelta(lines); 1004} 1005 1006static void lf(struct vc_data *vc) 1007{ 1008 /* don't scroll if above bottom of scrolling region, or 1009 * if below scrolling region 1010 */ 1011 if (vc->vc_y + 1 == vc->vc_bottom) 1012 scrup(vc, vc->vc_top, vc->vc_bottom, 1); 1013 else if (vc->vc_y < vc->vc_rows - 1) { 1014 vc->vc_y++; 1015 vc->vc_pos += vc->vc_size_row; 1016 } 1017 vc->vc_need_wrap = 0; 1018} 1019 1020static void ri(struct vc_data *vc) 1021{ 1022 /* don't scroll if below top of scrolling region, or 1023 * if above scrolling region 1024 */ 1025 if (vc->vc_y == vc->vc_top) 1026 scrdown(vc, vc->vc_top, vc->vc_bottom, 1); 1027 else if (vc->vc_y > 0) { 1028 vc->vc_y--; 1029 vc->vc_pos -= vc->vc_size_row; 1030 } 1031 vc->vc_need_wrap = 0; 1032} 1033 1034static inline void cr(struct vc_data *vc) 1035{ 1036 vc->vc_pos -= vc->vc_x << 1; 1037 vc->vc_need_wrap = vc->vc_x = 0; 1038} 1039 1040static inline void bs(struct vc_data *vc) 1041{ 1042 if (vc->vc_x) { 1043 vc->vc_pos -= 2; 1044 vc->vc_x--; 1045 vc->vc_need_wrap = 0; 1046 } 1047} 1048 1049static inline void del(struct vc_data *vc) 1050{ 1051 /* ignored */ 1052} 1053 1054static void csi_J(struct vc_data *vc, int vpar) 1055{ 1056 unsigned int count; 1057 unsigned short * start; 1058 1059 switch (vpar) { 1060 case 0: /* erase from cursor to end of display */ 1061 count = (vc->vc_scr_end - vc->vc_pos) >> 1; 1062 start = (unsigned short *)vc->vc_pos; 1063 if (DO_UPDATE(vc)) { 1064 /* do in two stages */ 1065 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, 1066 vc->vc_cols - vc->vc_x); 1067 vc->vc_sw->con_clear(vc, vc->vc_y + 1, 0, 1068 vc->vc_rows - vc->vc_y - 1, 1069 vc->vc_cols); 1070 } 1071 break; 1072 case 1: /* erase from start to cursor */ 1073 count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1; 1074 start = (unsigned short *)vc->vc_origin; 1075 if (DO_UPDATE(vc)) { 1076 /* do in two stages */ 1077 vc->vc_sw->con_clear(vc, 0, 0, vc->vc_y, 1078 vc->vc_cols); 1079 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1, 1080 vc->vc_x + 1); 1081 } 1082 break; 1083 case 2: /* erase whole display */ 1084 count = vc->vc_cols * vc->vc_rows; 1085 start = (unsigned short *)vc->vc_origin; 1086 if (DO_UPDATE(vc)) 1087 vc->vc_sw->con_clear(vc, 0, 0, 1088 vc->vc_rows, 1089 vc->vc_cols); 1090 break; 1091 default: 1092 return; 1093 } 1094 scr_memsetw(start, vc->vc_video_erase_char, 2 * count); 1095 vc->vc_need_wrap = 0; 1096} 1097 1098static void csi_K(struct vc_data *vc, int vpar) 1099{ 1100 unsigned int count; 1101 unsigned short * start; 1102 1103 switch (vpar) { 1104 case 0: /* erase from cursor to end of line */ 1105 count = vc->vc_cols - vc->vc_x; 1106 start = (unsigned short *)vc->vc_pos; 1107 if (DO_UPDATE(vc)) 1108 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, 1109 vc->vc_cols - vc->vc_x); 1110 break; 1111 case 1: /* erase from start of line to cursor */ 1112 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1)); 1113 count = vc->vc_x + 1; 1114 if (DO_UPDATE(vc)) 1115 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1, 1116 vc->vc_x + 1); 1117 break; 1118 case 2: /* erase whole line */ 1119 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1)); 1120 count = vc->vc_cols; 1121 if (DO_UPDATE(vc)) 1122 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1, 1123 vc->vc_cols); 1124 break; 1125 default: 1126 return; 1127 } 1128 scr_memsetw(start, vc->vc_video_erase_char, 2 * count); 1129 vc->vc_need_wrap = 0; 1130} 1131 1132static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */ 1133{ /* not vt100? */ 1134 int count; 1135 1136 if (!vpar) 1137 vpar++; 1138 count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar; 1139 1140 scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count); 1141 if (DO_UPDATE(vc)) 1142 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count); 1143 vc->vc_need_wrap = 0; 1144} 1145 1146static void default_attr(struct vc_data *vc) 1147{ 1148 vc->vc_intensity = 1; 1149 vc->vc_italic = 0; 1150 vc->vc_underline = 0; 1151 vc->vc_reverse = 0; 1152 vc->vc_blink = 0; 1153 vc->vc_color = vc->vc_def_color; 1154} 1155 1156/* console_sem is held */ 1157static void csi_m(struct vc_data *vc) 1158{ 1159 int i; 1160 1161 for (i = 0; i <= vc->vc_npar; i++) 1162 switch (vc->vc_par[i]) { 1163 case 0: /* all attributes off */ 1164 default_attr(vc); 1165 break; 1166 case 1: 1167 vc->vc_intensity = 2; 1168 break; 1169 case 2: 1170 vc->vc_intensity = 0; 1171 break; 1172 case 3: 1173 vc->vc_italic = 1; 1174 break; 1175 case 4: 1176 vc->vc_underline = 1; 1177 break; 1178 case 5: 1179 vc->vc_blink = 1; 1180 break; 1181 case 7: 1182 vc->vc_reverse = 1; 1183 break; 1184 case 10: /* ANSI X3.64-1979 (SCO-ish?) 1185 * Select primary font, don't display 1186 * control chars if defined, don't set 1187 * bit 8 on output. 1188 */ 1189 vc->vc_translate = set_translate(vc->vc_charset == 0 1190 ? vc->vc_G0_charset 1191 : vc->vc_G1_charset, vc); 1192 vc->vc_disp_ctrl = 0; 1193 vc->vc_toggle_meta = 0; 1194 break; 1195 case 11: /* ANSI X3.64-1979 (SCO-ish?) 1196 * Select first alternate font, lets 1197 * chars < 32 be displayed as ROM chars. 1198 */ 1199 vc->vc_translate = set_translate(IBMPC_MAP, vc); 1200 vc->vc_disp_ctrl = 1; 1201 vc->vc_toggle_meta = 0; 1202 break; 1203 case 12: /* ANSI X3.64-1979 (SCO-ish?) 1204 * Select second alternate font, toggle 1205 * high bit before displaying as ROM char. 1206 */ 1207 vc->vc_translate = set_translate(IBMPC_MAP, vc); 1208 vc->vc_disp_ctrl = 1; 1209 vc->vc_toggle_meta = 1; 1210 break; 1211 case 21: 1212 case 22: 1213 vc->vc_intensity = 1; 1214 break; 1215 case 23: 1216 vc->vc_italic = 0; 1217 break; 1218 case 24: 1219 vc->vc_underline = 0; 1220 break; 1221 case 25: 1222 vc->vc_blink = 0; 1223 break; 1224 case 27: 1225 vc->vc_reverse = 0; 1226 break; 1227 case 38: /* ANSI X3.64-1979 (SCO-ish?) 1228 * Enables underscore, white foreground 1229 * with white underscore (Linux - use 1230 * default foreground). 1231 */ 1232 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0); 1233 vc->vc_underline = 1; 1234 break; 1235 case 39: /* ANSI X3.64-1979 (SCO-ish?) 1236 * Disable underline option. 1237 * Reset colour to default? It did this 1238 * before... 1239 */ 1240 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0); 1241 vc->vc_underline = 0; 1242 break; 1243 case 49: 1244 vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f); 1245 break; 1246 default: 1247 if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37) 1248 vc->vc_color = color_table[vc->vc_par[i] - 30] 1249 | (vc->vc_color & 0xf0); 1250 else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47) 1251 vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4) 1252 | (vc->vc_color & 0x0f); 1253 break; 1254 } 1255 update_attr(vc); 1256} 1257 1258static void respond_string(const char *p, struct tty_struct *tty) 1259{ 1260 while (*p) { 1261 tty_insert_flip_char(tty, *p, 0); 1262 p++; 1263 } 1264 con_schedule_flip(tty); 1265} 1266 1267static void cursor_report(struct vc_data *vc, struct tty_struct *tty) 1268{ 1269 char buf[40]; 1270 1271 sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1); 1272 respond_string(buf, tty); 1273} 1274 1275static inline void status_report(struct tty_struct *tty) 1276{ 1277 respond_string("\033[0n", tty); /* Terminal ok */ 1278} 1279 1280static inline void respond_ID(struct tty_struct * tty) 1281{ 1282 respond_string(VT102ID, tty); 1283} 1284 1285void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry) 1286{ 1287 char buf[8]; 1288 1289 sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx), 1290 (char)('!' + mry)); 1291 respond_string(buf, tty); 1292} 1293 1294/* invoked via ioctl(TIOCLINUX) and through set_selection */ 1295int mouse_reporting(void) 1296{ 1297 return vc_cons[fg_console].d->vc_report_mouse; 1298} 1299 1300/* console_sem is held */ 1301static void set_mode(struct vc_data *vc, int on_off) 1302{ 1303 int i; 1304 1305 for (i = 0; i <= vc->vc_npar; i++) 1306 if (vc->vc_ques) { 1307 switch(vc->vc_par[i]) { /* DEC private modes set/reset */ 1308 case 1: /* Cursor keys send ^[Ox/^[[x */ 1309 if (on_off) 1310 set_kbd(vc, decckm); 1311 else 1312 clr_kbd(vc, decckm); 1313 break; 1314 case 3: /* 80/132 mode switch unimplemented */ 1315 vc->vc_deccolm = on_off; 1316 break; 1317 case 5: /* Inverted screen on/off */ 1318 if (vc->vc_decscnm != on_off) { 1319 vc->vc_decscnm = on_off; 1320 invert_screen(vc, 0, vc->vc_screenbuf_size, 0); 1321 update_attr(vc); 1322 } 1323 break; 1324 case 6: /* Origin relative/absolute */ 1325 vc->vc_decom = on_off; 1326 gotoxay(vc, 0, 0); 1327 break; 1328 case 7: /* Autowrap on/off */ 1329 vc->vc_decawm = on_off; 1330 break; 1331 case 8: /* Autorepeat on/off */ 1332 if (on_off) 1333 set_kbd(vc, decarm); 1334 else 1335 clr_kbd(vc, decarm); 1336 break; 1337 case 9: 1338 vc->vc_report_mouse = on_off ? 1 : 0; 1339 break; 1340 case 25: /* Cursor on/off */ 1341 vc->vc_deccm = on_off; 1342 break; 1343 case 1000: 1344 vc->vc_report_mouse = on_off ? 2 : 0; 1345 break; 1346 } 1347 } else { 1348 switch(vc->vc_par[i]) { /* ANSI modes set/reset */ 1349 case 3: /* Monitor (display ctrls) */ 1350 vc->vc_disp_ctrl = on_off; 1351 break; 1352 case 4: /* Insert Mode on/off */ 1353 vc->vc_decim = on_off; 1354 break; 1355 case 20: /* Lf, Enter == CrLf/Lf */ 1356 if (on_off) 1357 set_kbd(vc, lnm); 1358 else 1359 clr_kbd(vc, lnm); 1360 break; 1361 } 1362 } 1363} 1364 1365/* console_sem is held */ 1366static void setterm_command(struct vc_data *vc) 1367{ 1368 switch(vc->vc_par[0]) { 1369 case 1: /* set color for underline mode */ 1370 if (vc->vc_can_do_color && 1371 vc->vc_par[1] < 16) { 1372 vc->vc_ulcolor = color_table[vc->vc_par[1]]; 1373 if (vc->vc_underline) 1374 update_attr(vc); 1375 } 1376 break; 1377 case 2: /* set color for half intensity mode */ 1378 if (vc->vc_can_do_color && 1379 vc->vc_par[1] < 16) { 1380 vc->vc_halfcolor = color_table[vc->vc_par[1]]; 1381 if (vc->vc_intensity == 0) 1382 update_attr(vc); 1383 } 1384 break; 1385 case 8: /* store colors as defaults */ 1386 vc->vc_def_color = vc->vc_attr; 1387 if (vc->vc_hi_font_mask == 0x100) 1388 vc->vc_def_color >>= 1; 1389 default_attr(vc); 1390 update_attr(vc); 1391 break; 1392 case 9: /* set blanking interval */ 1393 blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ; 1394 poke_blanked_console(); 1395 break; 1396 case 10: /* set bell frequency in Hz */ 1397 if (vc->vc_npar >= 1) 1398 vc->vc_bell_pitch = vc->vc_par[1]; 1399 else 1400 vc->vc_bell_pitch = DEFAULT_BELL_PITCH; 1401 break; 1402 case 11: /* set bell duration in msec */ 1403 if (vc->vc_npar >= 1) 1404 vc->vc_bell_duration = (vc->vc_par[1] < 2000) ? 1405 vc->vc_par[1] * HZ / 1000 : 0; 1406 else 1407 vc->vc_bell_duration = DEFAULT_BELL_DURATION; 1408 break; 1409 case 12: /* bring specified console to the front */ 1410 if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1)) 1411 set_console(vc->vc_par[1] - 1); 1412 break; 1413 case 13: /* unblank the screen */ 1414 poke_blanked_console(); 1415 break; 1416 case 14: /* set vesa powerdown interval */ 1417 vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ; 1418 break; 1419 case 15: /* activate the previous console */ 1420 set_console(last_console); 1421 break; 1422 } 1423} 1424 1425/* console_sem is held */ 1426static void csi_at(struct vc_data *vc, unsigned int nr) 1427{ 1428 if (nr > vc->vc_cols - vc->vc_x) 1429 nr = vc->vc_cols - vc->vc_x; 1430 else if (!nr) 1431 nr = 1; 1432 insert_char(vc, nr); 1433} 1434 1435/* console_sem is held */ 1436static void csi_L(struct vc_data *vc, unsigned int nr) 1437{ 1438 if (nr > vc->vc_rows - vc->vc_y) 1439 nr = vc->vc_rows - vc->vc_y; 1440 else if (!nr) 1441 nr = 1; 1442 scrdown(vc, vc->vc_y, vc->vc_bottom, nr); 1443 vc->vc_need_wrap = 0; 1444} 1445 1446/* console_sem is held */ 1447static void csi_P(struct vc_data *vc, unsigned int nr) 1448{ 1449 if (nr > vc->vc_cols - vc->vc_x) 1450 nr = vc->vc_cols - vc->vc_x; 1451 else if (!nr) 1452 nr = 1; 1453 delete_char(vc, nr); 1454} 1455 1456/* console_sem is held */ 1457static void csi_M(struct vc_data *vc, unsigned int nr) 1458{ 1459 if (nr > vc->vc_rows - vc->vc_y) 1460 nr = vc->vc_rows - vc->vc_y; 1461 else if (!nr) 1462 nr=1; 1463 scrup(vc, vc->vc_y, vc->vc_bottom, nr); 1464 vc->vc_need_wrap = 0; 1465} 1466 1467/* console_sem is held (except via vc_init->reset_terminal */ 1468static void save_cur(struct vc_data *vc) 1469{ 1470 vc->vc_saved_x = vc->vc_x; 1471 vc->vc_saved_y = vc->vc_y; 1472 vc->vc_s_intensity = vc->vc_intensity; 1473 vc->vc_s_italic = vc->vc_italic; 1474 vc->vc_s_underline = vc->vc_underline; 1475 vc->vc_s_blink = vc->vc_blink; 1476 vc->vc_s_reverse = vc->vc_reverse; 1477 vc->vc_s_charset = vc->vc_charset; 1478 vc->vc_s_color = vc->vc_color; 1479 vc->vc_saved_G0 = vc->vc_G0_charset; 1480 vc->vc_saved_G1 = vc->vc_G1_charset; 1481} 1482 1483/* console_sem is held */ 1484static void restore_cur(struct vc_data *vc) 1485{ 1486 gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y); 1487 vc->vc_intensity = vc->vc_s_intensity; 1488 vc->vc_italic = vc->vc_s_italic; 1489 vc->vc_underline = vc->vc_s_underline; 1490 vc->vc_blink = vc->vc_s_blink; 1491 vc->vc_reverse = vc->vc_s_reverse; 1492 vc->vc_charset = vc->vc_s_charset; 1493 vc->vc_color = vc->vc_s_color; 1494 vc->vc_G0_charset = vc->vc_saved_G0; 1495 vc->vc_G1_charset = vc->vc_saved_G1; 1496 vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc); 1497 update_attr(vc); 1498 vc->vc_need_wrap = 0; 1499} 1500 1501enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey, 1502 EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd, 1503 ESpalette }; 1504 1505/* console_sem is held (except via vc_init()) */ 1506static void reset_terminal(struct vc_data *vc, int do_clear) 1507{ 1508 vc->vc_top = 0; 1509 vc->vc_bottom = vc->vc_rows; 1510 vc->vc_state = ESnormal; 1511 vc->vc_ques = 0; 1512 vc->vc_translate = set_translate(LAT1_MAP, vc); 1513 vc->vc_G0_charset = LAT1_MAP; 1514 vc->vc_G1_charset = GRAF_MAP; 1515 vc->vc_charset = 0; 1516 vc->vc_need_wrap = 0; 1517 vc->vc_report_mouse = 0; 1518 vc->vc_utf = default_utf8; 1519 vc->vc_utf_count = 0; 1520 1521 vc->vc_disp_ctrl = 0; 1522 vc->vc_toggle_meta = 0; 1523 1524 vc->vc_decscnm = 0; 1525 vc->vc_decom = 0; 1526 vc->vc_decawm = 1; 1527 vc->vc_deccm = 1; 1528 vc->vc_decim = 0; 1529 1530 set_kbd(vc, decarm); 1531 clr_kbd(vc, decckm); 1532 clr_kbd(vc, kbdapplic); 1533 clr_kbd(vc, lnm); 1534 kbd_table[vc->vc_num].lockstate = 0; 1535 kbd_table[vc->vc_num].slockstate = 0; 1536 kbd_table[vc->vc_num].ledmode = LED_SHOW_FLAGS; 1537 kbd_table[vc->vc_num].ledflagstate = kbd_table[vc->vc_num].default_ledflagstate; 1538 /* do not do set_leds here because this causes an endless tasklet loop 1539 when the keyboard hasn't been initialized yet */ 1540 1541 vc->vc_cursor_type = CUR_DEFAULT; 1542 vc->vc_complement_mask = vc->vc_s_complement_mask; 1543 1544 default_attr(vc); 1545 update_attr(vc); 1546 1547 vc->vc_tab_stop[0] = 0x01010100; 1548 vc->vc_tab_stop[1] = 1549 vc->vc_tab_stop[2] = 1550 vc->vc_tab_stop[3] = 1551 vc->vc_tab_stop[4] = 0x01010101; 1552 1553 vc->vc_bell_pitch = DEFAULT_BELL_PITCH; 1554 vc->vc_bell_duration = DEFAULT_BELL_DURATION; 1555 1556 gotoxy(vc, 0, 0); 1557 save_cur(vc); 1558 if (do_clear) 1559 csi_J(vc, 2); 1560} 1561 1562/* console_sem is held */ 1563static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c) 1564{ 1565 /* 1566 * Control characters can be used in the _middle_ 1567 * of an escape sequence. 1568 */ 1569 switch (c) { 1570 case 0: 1571 return; 1572 case 7: 1573 if (vc->vc_bell_duration) 1574 kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration); 1575 return; 1576 case 8: 1577 bs(vc); 1578 return; 1579 case 9: 1580 vc->vc_pos -= (vc->vc_x << 1); 1581 while (vc->vc_x < vc->vc_cols - 1) { 1582 vc->vc_x++; 1583 if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31))) 1584 break; 1585 } 1586 vc->vc_pos += (vc->vc_x << 1); 1587 return; 1588 case 10: case 11: case 12: 1589 lf(vc); 1590 if (!is_kbd(vc, lnm)) 1591 return; 1592 case 13: 1593 cr(vc); 1594 return; 1595 case 14: 1596 vc->vc_charset = 1; 1597 vc->vc_translate = set_translate(vc->vc_G1_charset, vc); 1598 vc->vc_disp_ctrl = 1; 1599 return; 1600 case 15: 1601 vc->vc_charset = 0; 1602 vc->vc_translate = set_translate(vc->vc_G0_charset, vc); 1603 vc->vc_disp_ctrl = 0; 1604 return; 1605 case 24: case 26: 1606 vc->vc_state = ESnormal; 1607 return; 1608 case 27: 1609 vc->vc_state = ESesc; 1610 return; 1611 case 127: 1612 del(vc); 1613 return; 1614 case 128+27: 1615 vc->vc_state = ESsquare; 1616 return; 1617 } 1618 switch(vc->vc_state) { 1619 case ESesc: 1620 vc->vc_state = ESnormal; 1621 switch (c) { 1622 case '[': 1623 vc->vc_state = ESsquare; 1624 return; 1625 case ']': 1626 vc->vc_state = ESnonstd; 1627 return; 1628 case '%': 1629 vc->vc_state = ESpercent; 1630 return; 1631 case 'E': 1632 cr(vc); 1633 lf(vc); 1634 return; 1635 case 'M': 1636 ri(vc); 1637 return; 1638 case 'D': 1639 lf(vc); 1640 return; 1641 case 'H': 1642 vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31)); 1643 return; 1644 case 'Z': 1645 respond_ID(tty); 1646 return; 1647 case '7': 1648 save_cur(vc); 1649 return; 1650 case '8': 1651 restore_cur(vc); 1652 return; 1653 case '(': 1654 vc->vc_state = ESsetG0; 1655 return; 1656 case ')': 1657 vc->vc_state = ESsetG1; 1658 return; 1659 case '#': 1660 vc->vc_state = EShash; 1661 return; 1662 case 'c': 1663 reset_terminal(vc, 1); 1664 return; 1665 case '>': /* Numeric keypad */ 1666 clr_kbd(vc, kbdapplic); 1667 return; 1668 case '=': /* Appl. keypad */ 1669 set_kbd(vc, kbdapplic); 1670 return; 1671 } 1672 return; 1673 case ESnonstd: 1674 if (c=='P') { /* palette escape sequence */ 1675 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++) 1676 vc->vc_par[vc->vc_npar] = 0; 1677 vc->vc_npar = 0; 1678 vc->vc_state = ESpalette; 1679 return; 1680 } else if (c=='R') { /* reset palette */ 1681 reset_palette(vc); 1682 vc->vc_state = ESnormal; 1683 } else 1684 vc->vc_state = ESnormal; 1685 return; 1686 case ESpalette: 1687 if ( (c>='0'&&c<='9') || (c>='A'&&c<='F') || (c>='a'&&c<='f') ) { 1688 vc->vc_par[vc->vc_npar++] = (c > '9' ? (c & 0xDF) - 'A' + 10 : c - '0'); 1689 if (vc->vc_npar == 7) { 1690 int i = vc->vc_par[0] * 3, j = 1; 1691 vc->vc_palette[i] = 16 * vc->vc_par[j++]; 1692 vc->vc_palette[i++] += vc->vc_par[j++]; 1693 vc->vc_palette[i] = 16 * vc->vc_par[j++]; 1694 vc->vc_palette[i++] += vc->vc_par[j++]; 1695 vc->vc_palette[i] = 16 * vc->vc_par[j++]; 1696 vc->vc_palette[i] += vc->vc_par[j]; 1697 set_palette(vc); 1698 vc->vc_state = ESnormal; 1699 } 1700 } else 1701 vc->vc_state = ESnormal; 1702 return; 1703 case ESsquare: 1704 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++) 1705 vc->vc_par[vc->vc_npar] = 0; 1706 vc->vc_npar = 0; 1707 vc->vc_state = ESgetpars; 1708 if (c == '[') { /* Function key */ 1709 vc->vc_state=ESfunckey; 1710 return; 1711 } 1712 vc->vc_ques = (c == '?'); 1713 if (vc->vc_ques) 1714 return; 1715 case ESgetpars: 1716 if (c == ';' && vc->vc_npar < NPAR - 1) { 1717 vc->vc_npar++; 1718 return; 1719 } else if (c>='0' && c<='9') { 1720 vc->vc_par[vc->vc_npar] *= 10; 1721 vc->vc_par[vc->vc_npar] += c - '0'; 1722 return; 1723 } else 1724 vc->vc_state = ESgotpars; 1725 case ESgotpars: 1726 vc->vc_state = ESnormal; 1727 switch(c) { 1728 case 'h': 1729 set_mode(vc, 1); 1730 return; 1731 case 'l': 1732 set_mode(vc, 0); 1733 return; 1734 case 'c': 1735 if (vc->vc_ques) { 1736 if (vc->vc_par[0]) 1737 vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16); 1738 else 1739 vc->vc_cursor_type = CUR_DEFAULT; 1740 return; 1741 } 1742 break; 1743 case 'm': 1744 if (vc->vc_ques) { 1745 clear_selection(); 1746 if (vc->vc_par[0]) 1747 vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1]; 1748 else 1749 vc->vc_complement_mask = vc->vc_s_complement_mask; 1750 return; 1751 } 1752 break; 1753 case 'n': 1754 if (!vc->vc_ques) { 1755 if (vc->vc_par[0] == 5) 1756 status_report(tty); 1757 else if (vc->vc_par[0] == 6) 1758 cursor_report(vc, tty); 1759 } 1760 return; 1761 } 1762 if (vc->vc_ques) { 1763 vc->vc_ques = 0; 1764 return; 1765 } 1766 switch(c) { 1767 case 'G': case '`': 1768 if (vc->vc_par[0]) 1769 vc->vc_par[0]--; 1770 gotoxy(vc, vc->vc_par[0], vc->vc_y); 1771 return; 1772 case 'A': 1773 if (!vc->vc_par[0]) 1774 vc->vc_par[0]++; 1775 gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]); 1776 return; 1777 case 'B': case 'e': 1778 if (!vc->vc_par[0]) 1779 vc->vc_par[0]++; 1780 gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]); 1781 return; 1782 case 'C': case 'a': 1783 if (!vc->vc_par[0]) 1784 vc->vc_par[0]++; 1785 gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y); 1786 return; 1787 case 'D': 1788 if (!vc->vc_par[0]) 1789 vc->vc_par[0]++; 1790 gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y); 1791 return; 1792 case 'E': 1793 if (!vc->vc_par[0]) 1794 vc->vc_par[0]++; 1795 gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]); 1796 return; 1797 case 'F': 1798 if (!vc->vc_par[0]) 1799 vc->vc_par[0]++; 1800 gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]); 1801 return; 1802 case 'd': 1803 if (vc->vc_par[0]) 1804 vc->vc_par[0]--; 1805 gotoxay(vc, vc->vc_x ,vc->vc_par[0]); 1806 return; 1807 case 'H': case 'f': 1808 if (vc->vc_par[0]) 1809 vc->vc_par[0]--; 1810 if (vc->vc_par[1]) 1811 vc->vc_par[1]--; 1812 gotoxay(vc, vc->vc_par[1], vc->vc_par[0]); 1813 return; 1814 case 'J': 1815 csi_J(vc, vc->vc_par[0]); 1816 return; 1817 case 'K': 1818 csi_K(vc, vc->vc_par[0]); 1819 return; 1820 case 'L': 1821 csi_L(vc, vc->vc_par[0]); 1822 return; 1823 case 'M': 1824 csi_M(vc, vc->vc_par[0]); 1825 return; 1826 case 'P': 1827 csi_P(vc, vc->vc_par[0]); 1828 return; 1829 case 'c': 1830 if (!vc->vc_par[0]) 1831 respond_ID(tty); 1832 return; 1833 case 'g': 1834 if (!vc->vc_par[0]) 1835 vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31)); 1836 else if (vc->vc_par[0] == 3) { 1837 vc->vc_tab_stop[0] = 1838 vc->vc_tab_stop[1] = 1839 vc->vc_tab_stop[2] = 1840 vc->vc_tab_stop[3] = 1841 vc->vc_tab_stop[4] = 0; 1842 } 1843 return; 1844 case 'm': 1845 csi_m(vc); 1846 return; 1847 case 'q': /* DECLL - but only 3 leds */ 1848 /* map 0,1,2,3 to 0,1,2,4 */ 1849 if (vc->vc_par[0] < 4) 1850 setledstate(kbd_table + vc->vc_num, 1851 (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4); 1852 return; 1853 case 'r': 1854 if (!vc->vc_par[0]) 1855 vc->vc_par[0]++; 1856 if (!vc->vc_par[1]) 1857 vc->vc_par[1] = vc->vc_rows; 1858 /* Minimum allowed region is 2 lines */ 1859 if (vc->vc_par[0] < vc->vc_par[1] && 1860 vc->vc_par[1] <= vc->vc_rows) { 1861 vc->vc_top = vc->vc_par[0] - 1; 1862 vc->vc_bottom = vc->vc_par[1]; 1863 gotoxay(vc, 0, 0); 1864 } 1865 return; 1866 case 's': 1867 save_cur(vc); 1868 return; 1869 case 'u': 1870 restore_cur(vc); 1871 return; 1872 case 'X': 1873 csi_X(vc, vc->vc_par[0]); 1874 return; 1875 case '@': 1876 csi_at(vc, vc->vc_par[0]); 1877 return; 1878 case ']': /* setterm functions */ 1879 setterm_command(vc); 1880 return; 1881 } 1882 return; 1883 case ESpercent: 1884 vc->vc_state = ESnormal; 1885 switch (c) { 1886 case '@': /* defined in ISO 2022 */ 1887 vc->vc_utf = 0; 1888 return; 1889 case 'G': /* prelim official escape code */ 1890 case '8': /* retained for compatibility */ 1891 vc->vc_utf = 1; 1892 return; 1893 } 1894 return; 1895 case ESfunckey: 1896 vc->vc_state = ESnormal; 1897 return; 1898 case EShash: 1899 vc->vc_state = ESnormal; 1900 if (c == '8') { 1901 /* DEC screen alignment test. kludge :-) */ 1902 vc->vc_video_erase_char = 1903 (vc->vc_video_erase_char & 0xff00) | 'E'; 1904 csi_J(vc, 2); 1905 vc->vc_video_erase_char = 1906 (vc->vc_video_erase_char & 0xff00) | ' '; 1907 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2); 1908 } 1909 return; 1910 case ESsetG0: 1911 if (c == '0') 1912 vc->vc_G0_charset = GRAF_MAP; 1913 else if (c == 'B') 1914 vc->vc_G0_charset = LAT1_MAP; 1915 else if (c == 'U') 1916 vc->vc_G0_charset = IBMPC_MAP; 1917 else if (c == 'K') 1918 vc->vc_G0_charset = USER_MAP; 1919 if (vc->vc_charset == 0) 1920 vc->vc_translate = set_translate(vc->vc_G0_charset, vc); 1921 vc->vc_state = ESnormal; 1922 return; 1923 case ESsetG1: 1924 if (c == '0') 1925 vc->vc_G1_charset = GRAF_MAP; 1926 else if (c == 'B') 1927 vc->vc_G1_charset = LAT1_MAP; 1928 else if (c == 'U') 1929 vc->vc_G1_charset = IBMPC_MAP; 1930 else if (c == 'K') 1931 vc->vc_G1_charset = USER_MAP; 1932 if (vc->vc_charset == 1) 1933 vc->vc_translate = set_translate(vc->vc_G1_charset, vc); 1934 vc->vc_state = ESnormal; 1935 return; 1936 default: 1937 vc->vc_state = ESnormal; 1938 } 1939} 1940 1941/* This is a temporary buffer used to prepare a tty console write 1942 * so that we can easily avoid touching user space while holding the 1943 * console spinlock. It is allocated in con_init and is shared by 1944 * this code and the vc_screen read/write tty calls. 1945 * 1946 * We have to allocate this statically in the kernel data section 1947 * since console_init (and thus con_init) are called before any 1948 * kernel memory allocation is available. 1949 */ 1950char con_buf[CON_BUF_SIZE]; 1951DEFINE_MUTEX(con_buf_mtx); 1952 1953/* is_double_width() is based on the wcwidth() implementation by 1954 * Markus Kuhn -- 2007-05-26 (Unicode 5.0) 1955 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c 1956 */ 1957struct interval { 1958 uint32_t first; 1959 uint32_t last; 1960}; 1961 1962static int bisearch(uint32_t ucs, const struct interval *table, int max) 1963{ 1964 int min = 0; 1965 int mid; 1966 1967 if (ucs < table[0].first || ucs > table[max].last) 1968 return 0; 1969 while (max >= min) { 1970 mid = (min + max) / 2; 1971 if (ucs > table[mid].last) 1972 min = mid + 1; 1973 else if (ucs < table[mid].first) 1974 max = mid - 1; 1975 else 1976 return 1; 1977 } 1978 return 0; 1979} 1980 1981static int is_double_width(uint32_t ucs) 1982{ 1983 static const struct interval double_width[] = { 1984 { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E }, 1985 { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF }, 1986 { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 }, 1987 { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD } 1988 }; 1989 return bisearch(ucs, double_width, 1990 sizeof(double_width) / sizeof(*double_width) - 1); 1991} 1992 1993/* acquires console_sem */ 1994static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count) 1995{ 1996#ifdef VT_BUF_VRAM_ONLY 1997#define FLUSH do { } while(0); 1998#else 1999#define FLUSH if (draw_x >= 0) { \ 2000 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \ 2001 draw_x = -1; \ 2002 } 2003#endif 2004 2005 int c, tc, ok, n = 0, draw_x = -1; 2006 unsigned int currcons; 2007 unsigned long draw_from = 0, draw_to = 0; 2008 struct vc_data *vc; 2009 unsigned char vc_attr; 2010 uint8_t rescan; 2011 uint8_t inverse; 2012 uint8_t width; 2013 u16 himask, charmask; 2014 const unsigned char *orig_buf = NULL; 2015 int orig_count; 2016 2017 if (in_interrupt()) 2018 return count; 2019 2020 might_sleep(); 2021 2022 acquire_console_sem(); 2023 vc = tty->driver_data; 2024 if (vc == NULL) { 2025 printk(KERN_ERR "vt: argh, driver_data is NULL !\n"); 2026 release_console_sem(); 2027 return 0; 2028 } 2029 2030 currcons = vc->vc_num; 2031 if (!vc_cons_allocated(currcons)) { 2032 /* could this happen? */ 2033 static int error = 0; 2034 if (!error) { 2035 error = 1; 2036 printk("con_write: tty %d not allocated\n", currcons+1); 2037 } 2038 release_console_sem(); 2039 return 0; 2040 } 2041 release_console_sem(); 2042 2043 orig_buf = buf; 2044 orig_count = count; 2045 2046 /* At this point 'buf' is guaranteed to be a kernel buffer 2047 * and therefore no access to userspace (and therefore sleeping) 2048 * will be needed. The con_buf_mtx serializes all tty based 2049 * console rendering and vcs write/read operations. We hold 2050 * the console spinlock during the entire write. 2051 */ 2052 2053 acquire_console_sem(); 2054 2055 vc = tty->driver_data; 2056 if (vc == NULL) { 2057 printk(KERN_ERR "vt: argh, driver_data _became_ NULL !\n"); 2058 release_console_sem(); 2059 goto out; 2060 } 2061 2062 himask = vc->vc_hi_font_mask; 2063 charmask = himask ? 0x1ff : 0xff; 2064 2065 /* undraw cursor first */ 2066 if (IS_FG(vc)) 2067 hide_cursor(vc); 2068 2069 while (!tty->stopped && count) { 2070 int orig = *buf; 2071 c = orig; 2072 buf++; 2073 n++; 2074 count--; 2075 rescan = 0; 2076 inverse = 0; 2077 width = 1; 2078 2079 /* Do no translation at all in control states */ 2080 if (vc->vc_state != ESnormal) { 2081 tc = c; 2082 } else if (vc->vc_utf && !vc->vc_disp_ctrl) { 2083 /* Combine UTF-8 into Unicode in vc_utf_char. 2084 * vc_utf_count is the number of continuation bytes still 2085 * expected to arrive. 2086 * vc_npar is the number of continuation bytes arrived so 2087 * far 2088 */ 2089rescan_last_byte: 2090 if ((c & 0xc0) == 0x80) { 2091 /* Continuation byte received */ 2092 static const uint32_t utf8_length_changes[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff }; 2093 if (vc->vc_utf_count) { 2094 vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f); 2095 vc->vc_npar++; 2096 if (--vc->vc_utf_count) { 2097 /* Still need some bytes */ 2098 continue; 2099 } 2100 /* Got a whole character */ 2101 c = vc->vc_utf_char; 2102 /* Reject overlong sequences */ 2103 if (c <= utf8_length_changes[vc->vc_npar - 1] || 2104 c > utf8_length_changes[vc->vc_npar]) 2105 c = 0xfffd; 2106 } else { 2107 /* Unexpected continuation byte */ 2108 vc->vc_utf_count = 0; 2109 c = 0xfffd; 2110 } 2111 } else { 2112 /* Single ASCII byte or first byte of a sequence received */ 2113 if (vc->vc_utf_count) { 2114 /* Continuation byte expected */ 2115 rescan = 1; 2116 vc->vc_utf_count = 0; 2117 c = 0xfffd; 2118 } else if (c > 0x7f) { 2119 /* First byte of a multibyte sequence received */ 2120 vc->vc_npar = 0; 2121 if ((c & 0xe0) == 0xc0) { 2122 vc->vc_utf_count = 1; 2123 vc->vc_utf_char = (c & 0x1f); 2124 } else if ((c & 0xf0) == 0xe0) { 2125 vc->vc_utf_count = 2; 2126 vc->vc_utf_char = (c & 0x0f); 2127 } else if ((c & 0xf8) == 0xf0) { 2128 vc->vc_utf_count = 3; 2129 vc->vc_utf_char = (c & 0x07); 2130 } else if ((c & 0xfc) == 0xf8) { 2131 vc->vc_utf_count = 4; 2132 vc->vc_utf_char = (c & 0x03); 2133 } else if ((c & 0xfe) == 0xfc) { 2134 vc->vc_utf_count = 5; 2135 vc->vc_utf_char = (c & 0x01); 2136 } else { 2137 /* 254 and 255 are invalid */ 2138 c = 0xfffd; 2139 } 2140 if (vc->vc_utf_count) { 2141 /* Still need some bytes */ 2142 continue; 2143 } 2144 } 2145 /* Nothing to do if an ASCII byte was received */ 2146 } 2147 /* End of UTF-8 decoding. */ 2148 /* c is the received character, or U+FFFD for invalid sequences. */ 2149 /* Replace invalid Unicode code points with U+FFFD too */ 2150 if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff) 2151 c = 0xfffd; 2152 tc = c; 2153 } else { /* no utf or alternate charset mode */ 2154 tc = vc->vc_translate[vc->vc_toggle_meta ? (c | 0x80) : c]; 2155 } 2156 2157 /* If the original code was a control character we 2158 * only allow a glyph to be displayed if the code is 2159 * not normally used (such as for cursor movement) or 2160 * if the disp_ctrl mode has been explicitly enabled. 2161 * Certain characters (as given by the CTRL_ALWAYS 2162 * bitmap) are always displayed as control characters, 2163 * as the console would be pretty useless without 2164 * them; to display an arbitrary font position use the 2165 * direct-to-font zone in UTF-8 mode. 2166 */ 2167 ok = tc && (c >= 32 || 2168 !(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 : 2169 vc->vc_utf || ((CTRL_ACTION >> c) & 1))) 2170 && (c != 127 || vc->vc_disp_ctrl) 2171 && (c != 128+27); 2172 2173 if (vc->vc_state == ESnormal && ok) { 2174 if (vc->vc_utf && !vc->vc_disp_ctrl) { 2175 if (is_double_width(c)) 2176 width = 2; 2177 } 2178 /* Now try to find out how to display it */ 2179 tc = conv_uni_to_pc(vc, tc); 2180 if (tc & ~charmask) { 2181 if (tc == -1 || tc == -2) { 2182 continue; /* nothing to display */ 2183 } 2184 /* Glyph not found */ 2185 if ((!(vc->vc_utf && !vc->vc_disp_ctrl) || c < 128) && !(c & ~charmask)) { 2186 /* In legacy mode use the glyph we get by a 1:1 mapping. 2187 This would make absolutely no sense with Unicode in mind, 2188 but do this for ASCII characters since a font may lack 2189 Unicode mapping info and we don't want to end up with 2190 having question marks only. */ 2191 tc = c; 2192 } else { 2193 /* Display U+FFFD. If it's not found, display an inverse question mark. */ 2194 tc = conv_uni_to_pc(vc, 0xfffd); 2195 if (tc < 0) { 2196 inverse = 1; 2197 tc = conv_uni_to_pc(vc, '?'); 2198 if (tc < 0) tc = '?'; 2199 } 2200 } 2201 } 2202 2203 if (!inverse) { 2204 vc_attr = vc->vc_attr; 2205 } else { 2206 /* invert vc_attr */ 2207 if (!vc->vc_can_do_color) { 2208 vc_attr = (vc->vc_attr) ^ 0x08; 2209 } else if (vc->vc_hi_font_mask == 0x100) { 2210 vc_attr = ((vc->vc_attr) & 0x11) | (((vc->vc_attr) & 0xe0) >> 4) | (((vc->vc_attr) & 0x0e) << 4); 2211 } else { 2212 vc_attr = ((vc->vc_attr) & 0x88) | (((vc->vc_attr) & 0x70) >> 4) | (((vc->vc_attr) & 0x07) << 4); 2213 } 2214 FLUSH 2215 } 2216 2217 while (1) { 2218 if (vc->vc_need_wrap || vc->vc_decim) 2219 FLUSH 2220 if (vc->vc_need_wrap) { 2221 cr(vc); 2222 lf(vc); 2223 } 2224 if (vc->vc_decim) 2225 insert_char(vc, 1); 2226 scr_writew(himask ? 2227 ((vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) : 2228 (vc_attr << 8) + tc, 2229 (u16 *) vc->vc_pos); 2230 if (DO_UPDATE(vc) && draw_x < 0) { 2231 draw_x = vc->vc_x; 2232 draw_from = vc->vc_pos; 2233 } 2234 if (vc->vc_x == vc->vc_cols - 1) { 2235 vc->vc_need_wrap = vc->vc_decawm; 2236 draw_to = vc->vc_pos + 2; 2237 } else { 2238 vc->vc_x++; 2239 draw_to = (vc->vc_pos += 2); 2240 } 2241 2242 if (!--width) break; 2243 2244 tc = conv_uni_to_pc(vc, ' '); /* A space is printed in the second column */ 2245 if (tc < 0) tc = ' '; 2246 } 2247 2248 if (inverse) { 2249 FLUSH 2250 } 2251 2252 if (rescan) { 2253 rescan = 0; 2254 inverse = 0; 2255 width = 1; 2256 c = orig; 2257 goto rescan_last_byte; 2258 } 2259 continue; 2260 } 2261 FLUSH 2262 do_con_trol(tty, vc, orig); 2263 } 2264 FLUSH 2265 console_conditional_schedule(); 2266 release_console_sem(); 2267 2268out: 2269 return n; 2270#undef FLUSH 2271} 2272 2273/* 2274 * This is the console switching callback. 2275 * 2276 * Doing console switching in a process context allows 2277 * us to do the switches asynchronously (needed when we want 2278 * to switch due to a keyboard interrupt). Synchronization 2279 * with other console code and prevention of re-entrancy is 2280 * ensured with console_sem. 2281 */ 2282static void console_callback(struct work_struct *ignored) 2283{ 2284 acquire_console_sem(); 2285 2286 if (want_console >= 0) { 2287 if (want_console != fg_console && 2288 vc_cons_allocated(want_console)) { 2289 hide_cursor(vc_cons[fg_console].d); 2290 change_console(vc_cons[want_console].d); 2291 /* we only changed when the console had already 2292 been allocated - a new console is not created 2293 in an interrupt routine */ 2294 } 2295 want_console = -1; 2296 } 2297 if (do_poke_blanked_console) { /* do not unblank for a LED change */ 2298 do_poke_blanked_console = 0; 2299 poke_blanked_console(); 2300 } 2301 if (scrollback_delta) { 2302 struct vc_data *vc = vc_cons[fg_console].d; 2303 clear_selection(); 2304 if (vc->vc_mode == KD_TEXT) 2305 vc->vc_sw->con_scrolldelta(vc, scrollback_delta); 2306 scrollback_delta = 0; 2307 } 2308 if (blank_timer_expired) { 2309 do_blank_screen(0); 2310 blank_timer_expired = 0; 2311 } 2312 2313 release_console_sem(); 2314} 2315 2316int set_console(int nr) 2317{ 2318 struct vc_data *vc = vc_cons[fg_console].d; 2319 2320 if (!vc_cons_allocated(nr) || vt_dont_switch || 2321 (vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) { 2322 2323 /* 2324 * Console switch will fail in console_callback() or 2325 * change_console() so there is no point scheduling 2326 * the callback 2327 * 2328 * Existing set_console() users don't check the return 2329 * value so this shouldn't break anything 2330 */ 2331 return -EINVAL; 2332 } 2333 2334 want_console = nr; 2335 schedule_console_callback(); 2336 2337 return 0; 2338} 2339 2340struct tty_driver *console_driver; 2341 2342#ifdef CONFIG_VT_CONSOLE 2343 2344/* 2345 * Console on virtual terminal 2346 * 2347 * The console must be locked when we get here. 2348 */ 2349 2350static void vt_console_print(struct console *co, const char *b, unsigned count) 2351{ 2352 struct vc_data *vc = vc_cons[fg_console].d; 2353 unsigned char c; 2354 static unsigned long printing; 2355 const ushort *start; 2356 ushort cnt = 0; 2357 ushort myx; 2358 2359 /* console busy or not yet initialized */ 2360 if (!printable || test_and_set_bit(0, &printing)) 2361 return; 2362 2363 if (kmsg_redirect && vc_cons_allocated(kmsg_redirect - 1)) 2364 vc = vc_cons[kmsg_redirect - 1].d; 2365 2366 /* read `x' only after setting currcons properly (otherwise 2367 the `x' macro will read the x of the foreground console). */ 2368 myx = vc->vc_x; 2369 2370 if (!vc_cons_allocated(fg_console)) { 2371 /* impossible */ 2372 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */ 2373 goto quit; 2374 } 2375 2376 if (vc->vc_mode != KD_TEXT) 2377 goto quit; 2378 2379 /* undraw cursor first */ 2380 if (IS_FG(vc)) 2381 hide_cursor(vc); 2382 2383 start = (ushort *)vc->vc_pos; 2384 2385 /* Contrived structure to try to emulate original need_wrap behaviour 2386 * Problems caused when we have need_wrap set on '\n' character */ 2387 while (count--) { 2388 c = *b++; 2389 if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) { 2390 if (cnt > 0) { 2391 if (CON_IS_VISIBLE(vc)) 2392 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x); 2393 vc->vc_x += cnt; 2394 if (vc->vc_need_wrap) 2395 vc->vc_x--; 2396 cnt = 0; 2397 } 2398 if (c == 8) { /* backspace */ 2399 bs(vc); 2400 start = (ushort *)vc->vc_pos; 2401 myx = vc->vc_x; 2402 continue; 2403 } 2404 if (c != 13) 2405 lf(vc); 2406 cr(vc); 2407 start = (ushort *)vc->vc_pos; 2408 myx = vc->vc_x; 2409 if (c == 10 || c == 13) 2410 continue; 2411 } 2412 scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos); 2413 cnt++; 2414 if (myx == vc->vc_cols - 1) { 2415 vc->vc_need_wrap = 1; 2416 continue; 2417 } 2418 vc->vc_pos += 2; 2419 myx++; 2420 } 2421 if (cnt > 0) { 2422 if (CON_IS_VISIBLE(vc)) 2423 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x); 2424 vc->vc_x += cnt; 2425 if (vc->vc_x == vc->vc_cols) { 2426 vc->vc_x--; 2427 vc->vc_need_wrap = 1; 2428 } 2429 } 2430 set_cursor(vc); 2431 2432quit: 2433 clear_bit(0, &printing); 2434} 2435 2436static struct tty_driver *vt_console_device(struct console *c, int *index) 2437{ 2438 *index = c->index ? c->index-1 : fg_console; 2439 return console_driver; 2440} 2441 2442static struct console vt_console_driver = { 2443 .name = "tty", 2444 .write = vt_console_print, 2445 .device = vt_console_device, 2446 .unblank = unblank_screen, 2447 .flags = CON_PRINTBUFFER, 2448 .index = -1, 2449}; 2450#endif 2451 2452/* 2453 * Handling of Linux-specific VC ioctls 2454 */ 2455 2456/* 2457 * Generally a bit racy with respect to console_sem(). 2458 * 2459 * There are some functions which don't need it. 2460 * 2461 * There are some functions which can sleep for arbitrary periods 2462 * (paste_selection) but we don't need the lock there anyway. 2463 * 2464 * set_selection has locking, and definitely needs it 2465 */ 2466 2467int tioclinux(struct tty_struct *tty, unsigned long arg) 2468{ 2469 char type, data; 2470 char __user *p = (char __user *)arg; 2471 int lines; 2472 int ret; 2473 2474 if (tty->driver->type != TTY_DRIVER_TYPE_CONSOLE) 2475 return -EINVAL; 2476 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN)) 2477 return -EPERM; 2478 if (get_user(type, p)) 2479 return -EFAULT; 2480 ret = 0; 2481 switch (type) 2482 { 2483 case TIOCL_SETSEL: 2484 acquire_console_sem(); 2485 ret = set_selection((struct tiocl_selection __user *)(p+1), tty); 2486 release_console_sem(); 2487 break; 2488 case TIOCL_PASTESEL: 2489 ret = paste_selection(tty); 2490 break; 2491 case TIOCL_UNBLANKSCREEN: 2492 acquire_console_sem(); 2493 unblank_screen(); 2494 release_console_sem(); 2495 break; 2496 case TIOCL_SELLOADLUT: 2497 ret = sel_loadlut(p); 2498 break; 2499 case TIOCL_GETSHIFTSTATE: 2500 2501 /* 2502 * Make it possible to react to Shift+Mousebutton. 2503 * Note that 'shift_state' is an undocumented 2504 * kernel-internal variable; programs not closely 2505 * related to the kernel should not use this. 2506 */ 2507 data = shift_state; 2508 ret = __put_user(data, p); 2509 break; 2510 case TIOCL_GETMOUSEREPORTING: 2511 data = mouse_reporting(); 2512 ret = __put_user(data, p); 2513 break; 2514 case TIOCL_SETVESABLANK: 2515 ret = set_vesa_blanking(p); 2516 break; 2517 case TIOCL_GETKMSGREDIRECT: 2518 data = kmsg_redirect; 2519 ret = __put_user(data, p); 2520 break; 2521 case TIOCL_SETKMSGREDIRECT: 2522 if (!capable(CAP_SYS_ADMIN)) { 2523 ret = -EPERM; 2524 } else { 2525 if (get_user(data, p+1)) 2526 ret = -EFAULT; 2527 else 2528 kmsg_redirect = data; 2529 } 2530 break; 2531 case TIOCL_GETFGCONSOLE: 2532 ret = fg_console; 2533 break; 2534 case TIOCL_SCROLLCONSOLE: 2535 if (get_user(lines, (s32 __user *)(p+4))) { 2536 ret = -EFAULT; 2537 } else { 2538 scrollfront(vc_cons[fg_console].d, lines); 2539 ret = 0; 2540 } 2541 break; 2542 case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */ 2543 acquire_console_sem(); 2544 ignore_poke = 1; 2545 do_blank_screen(0); 2546 release_console_sem(); 2547 break; 2548 case TIOCL_BLANKEDSCREEN: 2549 ret = console_blanked; 2550 break; 2551 default: 2552 ret = -EINVAL; 2553 break; 2554 } 2555 return ret; 2556} 2557 2558/* 2559 * /dev/ttyN handling 2560 */ 2561 2562static int con_write(struct tty_struct *tty, const unsigned char *buf, int count) 2563{ 2564 int retval; 2565 2566 retval = do_con_write(tty, buf, count); 2567 con_flush_chars(tty); 2568 2569 return retval; 2570} 2571 2572static void con_put_char(struct tty_struct *tty, unsigned char ch) 2573{ 2574 if (in_interrupt()) 2575 return; /* n_r3964 calls put_char() from interrupt context */ 2576 do_con_write(tty, &ch, 1); 2577} 2578 2579static int con_write_room(struct tty_struct *tty) 2580{ 2581 if (tty->stopped) 2582 return 0; 2583 return 4096; /* No limit, really; we're not buffering */ 2584} 2585 2586static int con_chars_in_buffer(struct tty_struct *tty) 2587{ 2588 return 0; /* we're not buffering */ 2589} 2590 2591/* 2592 * con_throttle and con_unthrottle are only used for 2593 * paste_selection(), which has to stuff in a large number of 2594 * characters... 2595 */ 2596static void con_throttle(struct tty_struct *tty) 2597{ 2598} 2599 2600static void con_unthrottle(struct tty_struct *tty) 2601{ 2602 struct vc_data *vc = tty->driver_data; 2603 2604 wake_up_interruptible(&vc->paste_wait); 2605} 2606 2607/* 2608 * Turn the Scroll-Lock LED on when the tty is stopped 2609 */ 2610static void con_stop(struct tty_struct *tty) 2611{ 2612 int console_num; 2613 if (!tty) 2614 return; 2615 console_num = tty->index; 2616 if (!vc_cons_allocated(console_num)) 2617 return; 2618 set_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK); 2619 set_leds(); 2620} 2621 2622/* 2623 * Turn the Scroll-Lock LED off when the console is started 2624 */ 2625static void con_start(struct tty_struct *tty) 2626{ 2627 int console_num; 2628 if (!tty) 2629 return; 2630 console_num = tty->index; 2631 if (!vc_cons_allocated(console_num)) 2632 return; 2633 clr_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK); 2634 set_leds(); 2635} 2636 2637static void con_flush_chars(struct tty_struct *tty) 2638{ 2639 struct vc_data *vc; 2640 2641 if (in_interrupt()) /* from flush_to_ldisc */ 2642 return; 2643 2644 /* if we race with con_close(), vt may be null */ 2645 acquire_console_sem(); 2646 vc = tty->driver_data; 2647 if (vc) 2648 set_cursor(vc); 2649 release_console_sem(); 2650} 2651 2652/* 2653 * Allocate the console screen memory. 2654 */ 2655static int con_open(struct tty_struct *tty, struct file *filp) 2656{ 2657 unsigned int currcons = tty->index; 2658 int ret = 0; 2659 2660 acquire_console_sem(); 2661 if (tty->driver_data == NULL) { 2662 ret = vc_allocate(currcons); 2663 if (ret == 0) { 2664 struct vc_data *vc = vc_cons[currcons].d; 2665 tty->driver_data = vc; 2666 vc->vc_tty = tty; 2667 2668 if (!tty->winsize.ws_row && !tty->winsize.ws_col) { 2669 tty->winsize.ws_row = vc_cons[currcons].d->vc_rows; 2670 tty->winsize.ws_col = vc_cons[currcons].d->vc_cols; 2671 } 2672 release_console_sem(); 2673 vcs_make_sysfs(tty); 2674 return ret; 2675 } 2676 } 2677 release_console_sem(); 2678 return ret; 2679} 2680 2681/* 2682 * We take tty_mutex in here to prevent another thread from coming in via init_dev 2683 * and taking a ref against the tty while we're in the process of forgetting 2684 * about it and cleaning things up. 2685 * 2686 * This is because vcs_remove_sysfs() can sleep and will drop the BKL. 2687 */ 2688static void con_close(struct tty_struct *tty, struct file *filp) 2689{ 2690 mutex_lock(&tty_mutex); 2691 acquire_console_sem(); 2692 if (tty && tty->count == 1) { 2693 struct vc_data *vc = tty->driver_data; 2694 2695 if (vc) 2696 vc->vc_tty = NULL; 2697 tty->driver_data = NULL; 2698 release_console_sem(); 2699 vcs_remove_sysfs(tty); 2700 mutex_unlock(&tty_mutex); 2701 /* 2702 * tty_mutex is released, but we still hold BKL, so there is 2703 * still exclusion against init_dev() 2704 */ 2705 return; 2706 } 2707 release_console_sem(); 2708 mutex_unlock(&tty_mutex); 2709} 2710 2711static int default_italic_color = 2; // green (ASCII) 2712static int default_underline_color = 3; // cyan (ASCII) 2713module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR); 2714module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR); 2715 2716static void vc_init(struct vc_data *vc, unsigned int rows, 2717 unsigned int cols, int do_clear) 2718{ 2719 int j, k ; 2720 2721 vc->vc_cols = cols; 2722 vc->vc_rows = rows; 2723 vc->vc_size_row = cols << 1; 2724 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row; 2725 2726 set_origin(vc); 2727 vc->vc_pos = vc->vc_origin; 2728 reset_vc(vc); 2729 for (j=k=0; j<16; j++) { 2730 vc->vc_palette[k++] = default_red[j] ; 2731 vc->vc_palette[k++] = default_grn[j] ; 2732 vc->vc_palette[k++] = default_blu[j] ; 2733 } 2734 vc->vc_def_color = 0x07; /* white */ 2735 vc->vc_ulcolor = default_underline_color; 2736 vc->vc_itcolor = default_italic_color; 2737 vc->vc_halfcolor = 0x08; /* grey */ 2738 init_waitqueue_head(&vc->paste_wait); 2739 reset_terminal(vc, do_clear); 2740} 2741 2742/* 2743 * This routine initializes console interrupts, and does nothing 2744 * else. If you want the screen to clear, call tty_write with 2745 * the appropriate escape-sequence. 2746 */ 2747 2748static int __init con_init(void) 2749{ 2750 const char *display_desc = NULL; 2751 struct vc_data *vc; 2752 unsigned int currcons = 0, i; 2753 2754 acquire_console_sem(); 2755 2756 if (conswitchp) 2757 display_desc = conswitchp->con_startup(); 2758 if (!display_desc) { 2759 fg_console = 0; 2760 release_console_sem(); 2761 return 0; 2762 } 2763 2764 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 2765 struct con_driver *con_driver = ®istered_con_driver[i]; 2766 2767 if (con_driver->con == NULL) { 2768 con_driver->con = conswitchp; 2769 con_driver->desc = display_desc; 2770 con_driver->flag = CON_DRIVER_FLAG_INIT; 2771 con_driver->first = 0; 2772 con_driver->last = MAX_NR_CONSOLES - 1; 2773 break; 2774 } 2775 } 2776 2777 for (i = 0; i < MAX_NR_CONSOLES; i++) 2778 con_driver_map[i] = conswitchp; 2779 2780 if (blankinterval) { 2781 blank_state = blank_normal_wait; 2782 mod_timer(&console_timer, jiffies + blankinterval); 2783 } 2784 2785 /* 2786 * kmalloc is not running yet - we use the bootmem allocator. 2787 */ 2788 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) { 2789 vc_cons[currcons].d = vc = alloc_bootmem(sizeof(struct vc_data)); 2790 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK); 2791 visual_init(vc, currcons, 1); 2792 vc->vc_screenbuf = (unsigned short *)alloc_bootmem(vc->vc_screenbuf_size); 2793 vc->vc_kmalloced = 0; 2794 vc_init(vc, vc->vc_rows, vc->vc_cols, 2795 currcons || !vc->vc_sw->con_save_screen); 2796 } 2797 currcons = fg_console = 0; 2798 master_display_fg = vc = vc_cons[currcons].d; 2799 set_origin(vc); 2800 save_screen(vc); 2801 gotoxy(vc, vc->vc_x, vc->vc_y); 2802 csi_J(vc, 0); 2803 update_screen(vc); 2804 printk("Console: %s %s %dx%d", 2805 vc->vc_can_do_color ? "colour" : "mono", 2806 display_desc, vc->vc_cols, vc->vc_rows); 2807 printable = 1; 2808 printk("\n"); 2809 2810 release_console_sem(); 2811 2812#ifdef CONFIG_VT_CONSOLE 2813 register_console(&vt_console_driver); 2814#endif 2815 return 0; 2816} 2817console_initcall(con_init); 2818 2819static const struct tty_operations con_ops = { 2820 .open = con_open, 2821 .close = con_close, 2822 .write = con_write, 2823 .write_room = con_write_room, 2824 .put_char = con_put_char, 2825 .flush_chars = con_flush_chars, 2826 .chars_in_buffer = con_chars_in_buffer, 2827 .ioctl = vt_ioctl, 2828 .stop = con_stop, 2829 .start = con_start, 2830 .throttle = con_throttle, 2831 .unthrottle = con_unthrottle, 2832}; 2833 2834int __init vty_init(void) 2835{ 2836 vcs_init(); 2837 2838 console_driver = alloc_tty_driver(MAX_NR_CONSOLES); 2839 if (!console_driver) 2840 panic("Couldn't allocate console driver\n"); 2841 console_driver->owner = THIS_MODULE; 2842 console_driver->name = "tty"; 2843 console_driver->name_base = 1; 2844 console_driver->major = TTY_MAJOR; 2845 console_driver->minor_start = 1; 2846 console_driver->type = TTY_DRIVER_TYPE_CONSOLE; 2847 console_driver->init_termios = tty_std_termios; 2848 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS; 2849 tty_set_operations(console_driver, &con_ops); 2850 if (tty_register_driver(console_driver)) 2851 panic("Couldn't register console driver\n"); 2852 2853 kbd_init(); 2854 console_map_init(); 2855#ifdef CONFIG_PROM_CONSOLE 2856 prom_con_init(); 2857#endif 2858#ifdef CONFIG_MDA_CONSOLE 2859 mda_console_init(); 2860#endif 2861 return 0; 2862} 2863 2864#ifndef VT_SINGLE_DRIVER 2865#include <linux/device.h> 2866 2867static struct class *vtconsole_class; 2868 2869static int bind_con_driver(const struct consw *csw, int first, int last, 2870 int deflt) 2871{ 2872 struct module *owner = csw->owner; 2873 const char *desc = NULL; 2874 struct con_driver *con_driver; 2875 int i, j = -1, k = -1, retval = -ENODEV; 2876 2877 if (!try_module_get(owner)) 2878 return -ENODEV; 2879 2880 acquire_console_sem(); 2881 2882 /* check if driver is registered */ 2883 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 2884 con_driver = ®istered_con_driver[i]; 2885 2886 if (con_driver->con == csw) { 2887 desc = con_driver->desc; 2888 retval = 0; 2889 break; 2890 } 2891 } 2892 2893 if (retval) 2894 goto err; 2895 2896 if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) { 2897 csw->con_startup(); 2898 con_driver->flag |= CON_DRIVER_FLAG_INIT; 2899 } 2900 2901 if (deflt) { 2902 if (conswitchp) 2903 module_put(conswitchp->owner); 2904 2905 __module_get(owner); 2906 conswitchp = csw; 2907 } 2908 2909 first = max(first, con_driver->first); 2910 last = min(last, con_driver->last); 2911 2912 for (i = first; i <= last; i++) { 2913 int old_was_color; 2914 struct vc_data *vc = vc_cons[i].d; 2915 2916 if (con_driver_map[i]) 2917 module_put(con_driver_map[i]->owner); 2918 __module_get(owner); 2919 con_driver_map[i] = csw; 2920 2921 if (!vc || !vc->vc_sw) 2922 continue; 2923 2924 j = i; 2925 2926 if (CON_IS_VISIBLE(vc)) { 2927 k = i; 2928 save_screen(vc); 2929 } 2930 2931 old_was_color = vc->vc_can_do_color; 2932 vc->vc_sw->con_deinit(vc); 2933 vc->vc_origin = (unsigned long)vc->vc_screenbuf; 2934 visual_init(vc, i, 0); 2935 set_origin(vc); 2936 update_attr(vc); 2937 2938 /* If the console changed between mono <-> color, then 2939 * the attributes in the screenbuf will be wrong. The 2940 * following resets all attributes to something sane. 2941 */ 2942 if (old_was_color != vc->vc_can_do_color) 2943 clear_buffer_attributes(vc); 2944 } 2945 2946 printk("Console: switching "); 2947 if (!deflt) 2948 printk("consoles %d-%d ", first+1, last+1); 2949 if (j >= 0) { 2950 struct vc_data *vc = vc_cons[j].d; 2951 2952 printk("to %s %s %dx%d\n", 2953 vc->vc_can_do_color ? "colour" : "mono", 2954 desc, vc->vc_cols, vc->vc_rows); 2955 2956 if (k >= 0) { 2957 vc = vc_cons[k].d; 2958 update_screen(vc); 2959 } 2960 } else 2961 printk("to %s\n", desc); 2962 2963 retval = 0; 2964err: 2965 release_console_sem(); 2966 module_put(owner); 2967 return retval; 2968}; 2969 2970#ifdef CONFIG_VT_HW_CONSOLE_BINDING 2971static int con_is_graphics(const struct consw *csw, int first, int last) 2972{ 2973 int i, retval = 0; 2974 2975 for (i = first; i <= last; i++) { 2976 struct vc_data *vc = vc_cons[i].d; 2977 2978 if (vc && vc->vc_mode == KD_GRAPHICS) { 2979 retval = 1; 2980 break; 2981 } 2982 } 2983 2984 return retval; 2985} 2986 2987static int unbind_con_driver(const struct consw *csw, int first, int last, 2988 int deflt) 2989{ 2990 struct module *owner = csw->owner; 2991 const struct consw *defcsw = NULL; 2992 struct con_driver *con_driver = NULL, *con_back = NULL; 2993 int i, retval = -ENODEV; 2994 2995 if (!try_module_get(owner)) 2996 return -ENODEV; 2997 2998 acquire_console_sem(); 2999 3000 /* check if driver is registered and if it is unbindable */ 3001 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3002 con_driver = ®istered_con_driver[i]; 3003 3004 if (con_driver->con == csw && 3005 con_driver->flag & CON_DRIVER_FLAG_MODULE) { 3006 retval = 0; 3007 break; 3008 } 3009 } 3010 3011 if (retval) { 3012 release_console_sem(); 3013 goto err; 3014 } 3015 3016 retval = -ENODEV; 3017 3018 /* check if backup driver exists */ 3019 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3020 con_back = ®istered_con_driver[i]; 3021 3022 if (con_back->con && 3023 !(con_back->flag & CON_DRIVER_FLAG_MODULE)) { 3024 defcsw = con_back->con; 3025 retval = 0; 3026 break; 3027 } 3028 } 3029 3030 if (retval) { 3031 release_console_sem(); 3032 goto err; 3033 } 3034 3035 if (!con_is_bound(csw)) { 3036 release_console_sem(); 3037 goto err; 3038 } 3039 3040 first = max(first, con_driver->first); 3041 last = min(last, con_driver->last); 3042 3043 for (i = first; i <= last; i++) { 3044 if (con_driver_map[i] == csw) { 3045 module_put(csw->owner); 3046 con_driver_map[i] = NULL; 3047 } 3048 } 3049 3050 if (!con_is_bound(defcsw)) { 3051 const struct consw *defconsw = conswitchp; 3052 3053 defcsw->con_startup(); 3054 con_back->flag |= CON_DRIVER_FLAG_INIT; 3055 /* 3056 * vgacon may change the default driver to point 3057 * to dummycon, we restore it here... 3058 */ 3059 conswitchp = defconsw; 3060 } 3061 3062 if (!con_is_bound(csw)) 3063 con_driver->flag &= ~CON_DRIVER_FLAG_INIT; 3064 3065 release_console_sem(); 3066 /* ignore return value, binding should not fail */ 3067 bind_con_driver(defcsw, first, last, deflt); 3068err: 3069 module_put(owner); 3070 return retval; 3071 3072} 3073 3074static int vt_bind(struct con_driver *con) 3075{ 3076 const struct consw *defcsw = NULL, *csw = NULL; 3077 int i, more = 1, first = -1, last = -1, deflt = 0; 3078 3079 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) || 3080 con_is_graphics(con->con, con->first, con->last)) 3081 goto err; 3082 3083 csw = con->con; 3084 3085 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3086 struct con_driver *con = ®istered_con_driver[i]; 3087 3088 if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) { 3089 defcsw = con->con; 3090 break; 3091 } 3092 } 3093 3094 if (!defcsw) 3095 goto err; 3096 3097 while (more) { 3098 more = 0; 3099 3100 for (i = con->first; i <= con->last; i++) { 3101 if (con_driver_map[i] == defcsw) { 3102 if (first == -1) 3103 first = i; 3104 last = i; 3105 more = 1; 3106 } else if (first != -1) 3107 break; 3108 } 3109 3110 if (first == 0 && last == MAX_NR_CONSOLES -1) 3111 deflt = 1; 3112 3113 if (first != -1) 3114 bind_con_driver(csw, first, last, deflt); 3115 3116 first = -1; 3117 last = -1; 3118 deflt = 0; 3119 } 3120 3121err: 3122 return 0; 3123} 3124 3125static int vt_unbind(struct con_driver *con) 3126{ 3127 const struct consw *csw = NULL; 3128 int i, more = 1, first = -1, last = -1, deflt = 0; 3129 3130 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) || 3131 con_is_graphics(con->con, con->first, con->last)) 3132 goto err; 3133 3134 csw = con->con; 3135 3136 while (more) { 3137 more = 0; 3138 3139 for (i = con->first; i <= con->last; i++) { 3140 if (con_driver_map[i] == csw) { 3141 if (first == -1) 3142 first = i; 3143 last = i; 3144 more = 1; 3145 } else if (first != -1) 3146 break; 3147 } 3148 3149 if (first == 0 && last == MAX_NR_CONSOLES -1) 3150 deflt = 1; 3151 3152 if (first != -1) 3153 unbind_con_driver(csw, first, last, deflt); 3154 3155 first = -1; 3156 last = -1; 3157 deflt = 0; 3158 } 3159 3160err: 3161 return 0; 3162} 3163#else 3164static inline int vt_bind(struct con_driver *con) 3165{ 3166 return 0; 3167} 3168static inline int vt_unbind(struct con_driver *con) 3169{ 3170 return 0; 3171} 3172#endif /* CONFIG_VT_HW_CONSOLE_BINDING */ 3173 3174static ssize_t store_bind(struct device *dev, struct device_attribute *attr, 3175 const char *buf, size_t count) 3176{ 3177 struct con_driver *con = dev_get_drvdata(dev); 3178 int bind = simple_strtoul(buf, NULL, 0); 3179 3180 if (bind) 3181 vt_bind(con); 3182 else 3183 vt_unbind(con); 3184 3185 return count; 3186} 3187 3188static ssize_t show_bind(struct device *dev, struct device_attribute *attr, 3189 char *buf) 3190{ 3191 struct con_driver *con = dev_get_drvdata(dev); 3192 int bind = con_is_bound(con->con); 3193 3194 return snprintf(buf, PAGE_SIZE, "%i\n", bind); 3195} 3196 3197static ssize_t show_name(struct device *dev, struct device_attribute *attr, 3198 char *buf) 3199{ 3200 struct con_driver *con = dev_get_drvdata(dev); 3201 3202 return snprintf(buf, PAGE_SIZE, "%s %s\n", 3203 (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)", 3204 con->desc); 3205 3206} 3207 3208static struct device_attribute device_attrs[] = { 3209 __ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind), 3210 __ATTR(name, S_IRUGO, show_name, NULL), 3211}; 3212 3213static int vtconsole_init_device(struct con_driver *con) 3214{ 3215 int i; 3216 int error = 0; 3217 3218 con->flag |= CON_DRIVER_FLAG_ATTR; 3219 dev_set_drvdata(con->dev, con); 3220 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) { 3221 error = device_create_file(con->dev, &device_attrs[i]); 3222 if (error) 3223 break; 3224 } 3225 3226 if (error) { 3227 while (--i >= 0) 3228 device_remove_file(con->dev, &device_attrs[i]); 3229 con->flag &= ~CON_DRIVER_FLAG_ATTR; 3230 } 3231 3232 return error; 3233} 3234 3235static void vtconsole_deinit_device(struct con_driver *con) 3236{ 3237 int i; 3238 3239 if (con->flag & CON_DRIVER_FLAG_ATTR) { 3240 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) 3241 device_remove_file(con->dev, &device_attrs[i]); 3242 con->flag &= ~CON_DRIVER_FLAG_ATTR; 3243 } 3244} 3245 3246/** 3247 * con_is_bound - checks if driver is bound to the console 3248 * @csw: console driver 3249 * 3250 * RETURNS: zero if unbound, nonzero if bound 3251 * 3252 * Drivers can call this and if zero, they should release 3253 * all resources allocated on con_startup() 3254 */ 3255int con_is_bound(const struct consw *csw) 3256{ 3257 int i, bound = 0; 3258 3259 for (i = 0; i < MAX_NR_CONSOLES; i++) { 3260 if (con_driver_map[i] == csw) { 3261 bound = 1; 3262 break; 3263 } 3264 } 3265 3266 return bound; 3267} 3268EXPORT_SYMBOL(con_is_bound); 3269 3270/** 3271 * register_con_driver - register console driver to console layer 3272 * @csw: console driver 3273 * @first: the first console to take over, minimum value is 0 3274 * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1 3275 * 3276 * DESCRIPTION: This function registers a console driver which can later 3277 * bind to a range of consoles specified by @first and @last. It will 3278 * also initialize the console driver by calling con_startup(). 3279 */ 3280int register_con_driver(const struct consw *csw, int first, int last) 3281{ 3282 struct module *owner = csw->owner; 3283 struct con_driver *con_driver; 3284 const char *desc; 3285 int i, retval = 0; 3286 3287 if (!try_module_get(owner)) 3288 return -ENODEV; 3289 3290 acquire_console_sem(); 3291 3292 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3293 con_driver = ®istered_con_driver[i]; 3294 3295 /* already registered */ 3296 if (con_driver->con == csw) 3297 retval = -EINVAL; 3298 } 3299 3300 if (retval) 3301 goto err; 3302 3303 desc = csw->con_startup(); 3304 3305 if (!desc) 3306 goto err; 3307 3308 retval = -EINVAL; 3309 3310 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3311 con_driver = ®istered_con_driver[i]; 3312 3313 if (con_driver->con == NULL) { 3314 con_driver->con = csw; 3315 con_driver->desc = desc; 3316 con_driver->node = i; 3317 con_driver->flag = CON_DRIVER_FLAG_MODULE | 3318 CON_DRIVER_FLAG_INIT; 3319 con_driver->first = first; 3320 con_driver->last = last; 3321 retval = 0; 3322 break; 3323 } 3324 } 3325 3326 if (retval) 3327 goto err; 3328 3329 con_driver->dev = device_create(vtconsole_class, NULL, 3330 MKDEV(0, con_driver->node), 3331 "vtcon%i", con_driver->node); 3332 3333 if (IS_ERR(con_driver->dev)) { 3334 printk(KERN_WARNING "Unable to create device for %s; " 3335 "errno = %ld\n", con_driver->desc, 3336 PTR_ERR(con_driver->dev)); 3337 con_driver->dev = NULL; 3338 } else { 3339 vtconsole_init_device(con_driver); 3340 } 3341 3342err: 3343 release_console_sem(); 3344 module_put(owner); 3345 return retval; 3346} 3347EXPORT_SYMBOL(register_con_driver); 3348 3349/** 3350 * unregister_con_driver - unregister console driver from console layer 3351 * @csw: console driver 3352 * 3353 * DESCRIPTION: All drivers that registers to the console layer must 3354 * call this function upon exit, or if the console driver is in a state 3355 * where it won't be able to handle console services, such as the 3356 * framebuffer console without loaded framebuffer drivers. 3357 * 3358 * The driver must unbind first prior to unregistration. 3359 */ 3360int unregister_con_driver(const struct consw *csw) 3361{ 3362 int i, retval = -ENODEV; 3363 3364 acquire_console_sem(); 3365 3366 /* cannot unregister a bound driver */ 3367 if (con_is_bound(csw)) 3368 goto err; 3369 3370 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3371 struct con_driver *con_driver = ®istered_con_driver[i]; 3372 3373 if (con_driver->con == csw && 3374 con_driver->flag & CON_DRIVER_FLAG_MODULE) { 3375 vtconsole_deinit_device(con_driver); 3376 device_destroy(vtconsole_class, 3377 MKDEV(0, con_driver->node)); 3378 con_driver->con = NULL; 3379 con_driver->desc = NULL; 3380 con_driver->dev = NULL; 3381 con_driver->node = 0; 3382 con_driver->flag = 0; 3383 con_driver->first = 0; 3384 con_driver->last = 0; 3385 retval = 0; 3386 break; 3387 } 3388 } 3389err: 3390 release_console_sem(); 3391 return retval; 3392} 3393EXPORT_SYMBOL(unregister_con_driver); 3394 3395/* 3396 * If we support more console drivers, this function is used 3397 * when a driver wants to take over some existing consoles 3398 * and become default driver for newly opened ones. 3399 * 3400 * take_over_console is basically a register followed by unbind 3401 */ 3402int take_over_console(const struct consw *csw, int first, int last, int deflt) 3403{ 3404 int err; 3405 3406 err = register_con_driver(csw, first, last); 3407 3408 if (!err) 3409 bind_con_driver(csw, first, last, deflt); 3410 3411 return err; 3412} 3413 3414/* 3415 * give_up_console is a wrapper to unregister_con_driver. It will only 3416 * work if driver is fully unbound. 3417 */ 3418void give_up_console(const struct consw *csw) 3419{ 3420 unregister_con_driver(csw); 3421} 3422 3423static int __init vtconsole_class_init(void) 3424{ 3425 int i; 3426 3427 vtconsole_class = class_create(THIS_MODULE, "vtconsole"); 3428 if (IS_ERR(vtconsole_class)) { 3429 printk(KERN_WARNING "Unable to create vt console class; " 3430 "errno = %ld\n", PTR_ERR(vtconsole_class)); 3431 vtconsole_class = NULL; 3432 } 3433 3434 /* Add system drivers to sysfs */ 3435 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3436 struct con_driver *con = ®istered_con_driver[i]; 3437 3438 if (con->con && !con->dev) { 3439 con->dev = device_create(vtconsole_class, NULL, 3440 MKDEV(0, con->node), 3441 "vtcon%i", con->node); 3442 3443 if (IS_ERR(con->dev)) { 3444 printk(KERN_WARNING "Unable to create " 3445 "device for %s; errno = %ld\n", 3446 con->desc, PTR_ERR(con->dev)); 3447 con->dev = NULL; 3448 } else { 3449 vtconsole_init_device(con); 3450 } 3451 } 3452 } 3453 3454 return 0; 3455} 3456postcore_initcall(vtconsole_class_init); 3457 3458#endif 3459 3460/* 3461 * Screen blanking 3462 */ 3463 3464static int set_vesa_blanking(char __user *p) 3465{ 3466 unsigned int mode; 3467 3468 if (get_user(mode, p + 1)) 3469 return -EFAULT; 3470 3471 vesa_blank_mode = (mode < 4) ? mode : 0; 3472 return 0; 3473} 3474 3475void do_blank_screen(int entering_gfx) 3476{ 3477 struct vc_data *vc = vc_cons[fg_console].d; 3478 int i; 3479 3480 WARN_CONSOLE_UNLOCKED(); 3481 3482 if (console_blanked) { 3483 if (blank_state == blank_vesa_wait) { 3484 blank_state = blank_off; 3485 vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0); 3486 } 3487 return; 3488 } 3489 if (blank_state != blank_normal_wait) 3490 return; 3491 blank_state = blank_off; 3492 3493 /* entering graphics mode? */ 3494 if (entering_gfx) { 3495 hide_cursor(vc); 3496 save_screen(vc); 3497 vc->vc_sw->con_blank(vc, -1, 1); 3498 console_blanked = fg_console + 1; 3499 set_origin(vc); 3500 return; 3501 } 3502 3503 /* don't blank graphics */ 3504 if (vc->vc_mode != KD_TEXT) { 3505 console_blanked = fg_console + 1; 3506 return; 3507 } 3508 3509 hide_cursor(vc); 3510 del_timer_sync(&console_timer); 3511 blank_timer_expired = 0; 3512 3513 save_screen(vc); 3514 /* In case we need to reset origin, blanking hook returns 1 */ 3515 i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0); 3516 console_blanked = fg_console + 1; 3517 if (i) 3518 set_origin(vc); 3519 3520 if (console_blank_hook && console_blank_hook(1)) 3521 return; 3522 3523 if (vesa_off_interval && vesa_blank_mode) { 3524 blank_state = blank_vesa_wait; 3525 mod_timer(&console_timer, jiffies + vesa_off_interval); 3526 } 3527} 3528EXPORT_SYMBOL(do_blank_screen); 3529 3530/* 3531 * Called by timer as well as from vt_console_driver 3532 */ 3533void do_unblank_screen(int leaving_gfx) 3534{ 3535 struct vc_data *vc; 3536 3537 /* This should now always be called from a "sane" (read: can schedule) 3538 * context for the sake of the low level drivers, except in the special 3539 * case of oops_in_progress 3540 */ 3541 if (!oops_in_progress) 3542 might_sleep(); 3543 3544 WARN_CONSOLE_UNLOCKED(); 3545 3546 ignore_poke = 0; 3547 if (!console_blanked) 3548 return; 3549 if (!vc_cons_allocated(fg_console)) { 3550 /* impossible */ 3551 printk("unblank_screen: tty %d not allocated ??\n", fg_console+1); 3552 return; 3553 } 3554 vc = vc_cons[fg_console].d; 3555 if (vc->vc_mode != KD_TEXT) 3556 return; /* but leave console_blanked != 0 */ 3557 3558 if (blankinterval) { 3559 mod_timer(&console_timer, jiffies + blankinterval); 3560 blank_state = blank_normal_wait; 3561 } 3562 3563 console_blanked = 0; 3564 if (vc->vc_sw->con_blank(vc, 0, leaving_gfx)) 3565 /* Low-level driver cannot restore -> do it ourselves */ 3566 update_screen(vc); 3567 if (console_blank_hook) 3568 console_blank_hook(0); 3569 set_palette(vc); 3570 set_cursor(vc); 3571} 3572EXPORT_SYMBOL(do_unblank_screen); 3573 3574/* 3575 * This is called by the outside world to cause a forced unblank, mostly for 3576 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually 3577 * call it with 1 as an argument and so force a mode restore... that may kill 3578 * X or at least garbage the screen but would also make the Oops visible... 3579 */ 3580void unblank_screen(void) 3581{ 3582 do_unblank_screen(0); 3583} 3584 3585/* 3586 * We defer the timer blanking to work queue so it can take the console mutex 3587 * (console operations can still happen at irq time, but only from printk which 3588 * has the console mutex. Not perfect yet, but better than no locking 3589 */ 3590static void blank_screen_t(unsigned long dummy) 3591{ 3592 if (unlikely(!keventd_up())) { 3593 mod_timer(&console_timer, jiffies + blankinterval); 3594 return; 3595 } 3596 blank_timer_expired = 1; 3597 schedule_work(&console_work); 3598} 3599 3600void poke_blanked_console(void) 3601{ 3602 WARN_CONSOLE_UNLOCKED(); 3603 3604 /* Add this so we quickly catch whoever might call us in a non 3605 * safe context. Nowadays, unblank_screen() isn't to be called in 3606 * atomic contexts and is allowed to schedule (with the special case 3607 * of oops_in_progress, but that isn't of any concern for this 3608 * function. --BenH. 3609 */ 3610 might_sleep(); 3611 3612 /* This isn't perfectly race free, but a race here would be mostly harmless, 3613 * at worse, we'll do a spurrious blank and it's unlikely 3614 */ 3615 del_timer(&console_timer); 3616 blank_timer_expired = 0; 3617 3618 if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS) 3619 return; 3620 if (console_blanked) 3621 unblank_screen(); 3622 else if (blankinterval) { 3623 mod_timer(&console_timer, jiffies + blankinterval); 3624 blank_state = blank_normal_wait; 3625 } 3626} 3627 3628/* 3629 * Palettes 3630 */ 3631 3632static void set_palette(struct vc_data *vc) 3633{ 3634 WARN_CONSOLE_UNLOCKED(); 3635 3636 if (vc->vc_mode != KD_GRAPHICS) 3637 vc->vc_sw->con_set_palette(vc, color_table); 3638} 3639 3640static int set_get_cmap(unsigned char __user *arg, int set) 3641{ 3642 int i, j, k; 3643 3644 WARN_CONSOLE_UNLOCKED(); 3645 3646 for (i = 0; i < 16; i++) 3647 if (set) { 3648 get_user(default_red[i], arg++); 3649 get_user(default_grn[i], arg++); 3650 get_user(default_blu[i], arg++); 3651 } else { 3652 put_user(default_red[i], arg++); 3653 put_user(default_grn[i], arg++); 3654 put_user(default_blu[i], arg++); 3655 } 3656 if (set) { 3657 for (i = 0; i < MAX_NR_CONSOLES; i++) 3658 if (vc_cons_allocated(i)) { 3659 for (j = k = 0; j < 16; j++) { 3660 vc_cons[i].d->vc_palette[k++] = default_red[j]; 3661 vc_cons[i].d->vc_palette[k++] = default_grn[j]; 3662 vc_cons[i].d->vc_palette[k++] = default_blu[j]; 3663 } 3664 set_palette(vc_cons[i].d); 3665 } 3666 } 3667 return 0; 3668} 3669 3670/* 3671 * Load palette into the DAC registers. arg points to a colour 3672 * map, 3 bytes per colour, 16 colours, range from 0 to 255. 3673 */ 3674 3675int con_set_cmap(unsigned char __user *arg) 3676{ 3677 int rc; 3678 3679 acquire_console_sem(); 3680 rc = set_get_cmap (arg,1); 3681 release_console_sem(); 3682 3683 return rc; 3684} 3685 3686int con_get_cmap(unsigned char __user *arg) 3687{ 3688 int rc; 3689 3690 acquire_console_sem(); 3691 rc = set_get_cmap (arg,0); 3692 release_console_sem(); 3693 3694 return rc; 3695} 3696 3697void reset_palette(struct vc_data *vc) 3698{ 3699 int j, k; 3700 for (j=k=0; j<16; j++) { 3701 vc->vc_palette[k++] = default_red[j]; 3702 vc->vc_palette[k++] = default_grn[j]; 3703 vc->vc_palette[k++] = default_blu[j]; 3704 } 3705 set_palette(vc); 3706} 3707 3708/* 3709 * Font switching 3710 * 3711 * Currently we only support fonts up to 32 pixels wide, at a maximum height 3712 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints, 3713 * depending on width) reserved for each character which is kinda wasty, but 3714 * this is done in order to maintain compatibility with the EGA/VGA fonts. It 3715 * is upto the actual low-level console-driver convert data into its favorite 3716 * format (maybe we should add a `fontoffset' field to the `display' 3717 * structure so we won't have to convert the fontdata all the time. 3718 * /Jes 3719 */ 3720 3721#define max_font_size 65536 3722 3723static int con_font_get(struct vc_data *vc, struct console_font_op *op) 3724{ 3725 struct console_font font; 3726 int rc = -EINVAL; 3727 int c; 3728 3729 if (vc->vc_mode != KD_TEXT) 3730 return -EINVAL; 3731 3732 if (op->data) { 3733 font.data = kmalloc(max_font_size, GFP_KERNEL); 3734 if (!font.data) 3735 return -ENOMEM; 3736 } else 3737 font.data = NULL; 3738 3739 acquire_console_sem(); 3740 if (vc->vc_sw->con_font_get) 3741 rc = vc->vc_sw->con_font_get(vc, &font); 3742 else 3743 rc = -ENOSYS; 3744 release_console_sem(); 3745 3746 if (rc) 3747 goto out; 3748 3749 c = (font.width+7)/8 * 32 * font.charcount; 3750 3751 if (op->data && font.charcount > op->charcount) 3752 rc = -ENOSPC; 3753 if (!(op->flags & KD_FONT_FLAG_OLD)) { 3754 if (font.width > op->width || font.height > op->height) 3755 rc = -ENOSPC; 3756 } else { 3757 if (font.width != 8) 3758 rc = -EIO; 3759 else if ((op->height && font.height > op->height) || 3760 font.height > 32) 3761 rc = -ENOSPC; 3762 } 3763 if (rc) 3764 goto out; 3765 3766 op->height = font.height; 3767 op->width = font.width; 3768 op->charcount = font.charcount; 3769 3770 if (op->data && copy_to_user(op->data, font.data, c)) 3771 rc = -EFAULT; 3772 3773out: 3774 kfree(font.data); 3775 return rc; 3776} 3777 3778static int con_font_set(struct vc_data *vc, struct console_font_op *op) 3779{ 3780 struct console_font font; 3781 int rc = -EINVAL; 3782 int size; 3783 3784 if (vc->vc_mode != KD_TEXT) 3785 return -EINVAL; 3786 if (!op->data) 3787 return -EINVAL; 3788 if (op->charcount > 512) 3789 return -EINVAL; 3790 if (!op->height) { /* Need to guess font height [compat] */ 3791 int h, i; 3792 u8 __user *charmap = op->data; 3793 u8 tmp; 3794 3795 /* If from KDFONTOP ioctl, don't allow things which can be done in userland, 3796 so that we can get rid of this soon */ 3797 if (!(op->flags & KD_FONT_FLAG_OLD)) 3798 return -EINVAL; 3799 for (h = 32; h > 0; h--) 3800 for (i = 0; i < op->charcount; i++) { 3801 if (get_user(tmp, &charmap[32*i+h-1])) 3802 return -EFAULT; 3803 if (tmp) 3804 goto nonzero; 3805 } 3806 return -EINVAL; 3807 nonzero: 3808 op->height = h; 3809 } 3810 if (op->width <= 0 || op->width > 32 || op->height > 32) 3811 return -EINVAL; 3812 size = (op->width+7)/8 * 32 * op->charcount; 3813 if (size > max_font_size) 3814 return -ENOSPC; 3815 font.charcount = op->charcount; 3816 font.height = op->height; 3817 font.width = op->width; 3818 font.data = kmalloc(size, GFP_KERNEL); 3819 if (!font.data) 3820 return -ENOMEM; 3821 if (copy_from_user(font.data, op->data, size)) { 3822 kfree(font.data); 3823 return -EFAULT; 3824 } 3825 acquire_console_sem(); 3826 if (vc->vc_sw->con_font_set) 3827 rc = vc->vc_sw->con_font_set(vc, &font, op->flags); 3828 else 3829 rc = -ENOSYS; 3830 release_console_sem(); 3831 kfree(font.data); 3832 return rc; 3833} 3834 3835static int con_font_default(struct vc_data *vc, struct console_font_op *op) 3836{ 3837 struct console_font font = {.width = op->width, .height = op->height}; 3838 char name[MAX_FONT_NAME]; 3839 char *s = name; 3840 int rc; 3841 3842 if (vc->vc_mode != KD_TEXT) 3843 return -EINVAL; 3844 3845 if (!op->data) 3846 s = NULL; 3847 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0) 3848 return -EFAULT; 3849 else 3850 name[MAX_FONT_NAME - 1] = 0; 3851 3852 acquire_console_sem(); 3853 if (vc->vc_sw->con_font_default) 3854 rc = vc->vc_sw->con_font_default(vc, &font, s); 3855 else 3856 rc = -ENOSYS; 3857 release_console_sem(); 3858 if (!rc) { 3859 op->width = font.width; 3860 op->height = font.height; 3861 } 3862 return rc; 3863} 3864 3865static int con_font_copy(struct vc_data *vc, struct console_font_op *op) 3866{ 3867 int con = op->height; 3868 int rc; 3869 3870 if (vc->vc_mode != KD_TEXT) 3871 return -EINVAL; 3872 3873 acquire_console_sem(); 3874 if (!vc->vc_sw->con_font_copy) 3875 rc = -ENOSYS; 3876 else if (con < 0 || !vc_cons_allocated(con)) 3877 rc = -ENOTTY; 3878 else if (con == vc->vc_num) /* nothing to do */ 3879 rc = 0; 3880 else 3881 rc = vc->vc_sw->con_font_copy(vc, con); 3882 release_console_sem(); 3883 return rc; 3884} 3885 3886int con_font_op(struct vc_data *vc, struct console_font_op *op) 3887{ 3888 switch (op->op) { 3889 case KD_FONT_OP_SET: 3890 return con_font_set(vc, op); 3891 case KD_FONT_OP_GET: 3892 return con_font_get(vc, op); 3893 case KD_FONT_OP_SET_DEFAULT: 3894 return con_font_default(vc, op); 3895 case KD_FONT_OP_COPY: 3896 return con_font_copy(vc, op); 3897 } 3898 return -ENOSYS; 3899} 3900 3901/* 3902 * Interface exported to selection and vcs. 3903 */ 3904 3905/* used by selection */ 3906u16 screen_glyph(struct vc_data *vc, int offset) 3907{ 3908 u16 w = scr_readw(screenpos(vc, offset, 1)); 3909 u16 c = w & 0xff; 3910 3911 if (w & vc->vc_hi_font_mask) 3912 c |= 0x100; 3913 return c; 3914} 3915 3916/* used by vcs - note the word offset */ 3917unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed) 3918{ 3919 return screenpos(vc, 2 * w_offset, viewed); 3920} 3921 3922void getconsxy(struct vc_data *vc, unsigned char *p) 3923{ 3924 p[0] = vc->vc_x; 3925 p[1] = vc->vc_y; 3926} 3927 3928void putconsxy(struct vc_data *vc, unsigned char *p) 3929{ 3930 hide_cursor(vc); 3931 gotoxy(vc, p[0], p[1]); 3932 set_cursor(vc); 3933} 3934 3935u16 vcs_scr_readw(struct vc_data *vc, const u16 *org) 3936{ 3937 if ((unsigned long)org == vc->vc_pos && softcursor_original != -1) 3938 return softcursor_original; 3939 return scr_readw(org); 3940} 3941 3942void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org) 3943{ 3944 scr_writew(val, org); 3945 if ((unsigned long)org == vc->vc_pos) { 3946 softcursor_original = -1; 3947 add_softcursor(vc); 3948 } 3949} 3950 3951/* 3952 * Visible symbols for modules 3953 */ 3954 3955EXPORT_SYMBOL(color_table); 3956EXPORT_SYMBOL(default_red); 3957EXPORT_SYMBOL(default_grn); 3958EXPORT_SYMBOL(default_blu); 3959EXPORT_SYMBOL(update_region); 3960EXPORT_SYMBOL(redraw_screen); 3961EXPORT_SYMBOL(vc_resize); 3962EXPORT_SYMBOL(vc_lock_resize); 3963EXPORT_SYMBOL(fg_console); 3964EXPORT_SYMBOL(console_blank_hook); 3965EXPORT_SYMBOL(console_blanked); 3966EXPORT_SYMBOL(vc_cons); 3967#ifndef VT_SINGLE_DRIVER 3968EXPORT_SYMBOL(take_over_console); 3969EXPORT_SYMBOL(give_up_console); 3970#endif 3971