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 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/smp_lock.h> 93 #include <linux/tiocl.h> 94 #include <linux/kbd_kern.h> 95 #include <linux/consolemap.h> 96 #include <linux/timer.h> 97 #include <linux/interrupt.h> 98 #include <linux/workqueue.h> 99 #include <linux/pm.h> 100 #include <linux/font.h> 101 #include <linux/bitops.h> 102 #include <linux/notifier.h> 103 #include <linux/device.h> 104 #include <linux/io.h> 105 #include <asm/system.h> 106 #include <linux/uaccess.h> 107 #include <linux/kdb.h> 108 #include <linux/ctype.h> 109 110 #define MAX_NR_CON_DRIVER 16 111 112 #define CON_DRIVER_FLAG_MODULE 1 113 #define CON_DRIVER_FLAG_INIT 2 114 #define CON_DRIVER_FLAG_ATTR 4 115 116 struct con_driver { 117 const struct consw *con; 118 const char *desc; 119 struct device *dev; 120 int node; 121 int first; 122 int last; 123 int flag; 124 }; 125 126 static struct con_driver registered_con_driver[MAX_NR_CON_DRIVER]; 127 const struct consw *conswitchp; 128 129 /* A bitmap for codes <32. A bit of 1 indicates that the code 130 * corresponding to that bit number invokes some special action 131 * (such as cursor movement) and should not be displayed as a 132 * glyph unless the disp_ctrl mode is explicitly enabled. 133 */ 134 #define CTRL_ACTION 0x0d00ff81 135 #define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */ 136 137 /* 138 * Here is the default bell parameters: 750HZ, 1/8th of a second 139 */ 140 #define DEFAULT_BELL_PITCH 750 141 #define DEFAULT_BELL_DURATION (HZ/8) 142 143 struct vc vc_cons [MAX_NR_CONSOLES]; 144 145 #ifndef VT_SINGLE_DRIVER 146 static const struct consw *con_driver_map[MAX_NR_CONSOLES]; 147 #endif 148 149 static int con_open(struct tty_struct *, struct file *); 150 static void vc_init(struct vc_data *vc, unsigned int rows, 151 unsigned int cols, int do_clear); 152 static void gotoxy(struct vc_data *vc, int new_x, int new_y); 153 static void save_cur(struct vc_data *vc); 154 static void reset_terminal(struct vc_data *vc, int do_clear); 155 static void con_flush_chars(struct tty_struct *tty); 156 static int set_vesa_blanking(char __user *p); 157 static void set_cursor(struct vc_data *vc); 158 static void hide_cursor(struct vc_data *vc); 159 static void console_callback(struct work_struct *ignored); 160 static void blank_screen_t(unsigned long dummy); 161 static void set_palette(struct vc_data *vc); 162 163 static int printable; /* Is console ready for printing? */ 164 int default_utf8 = true; 165 module_param(default_utf8, int, S_IRUGO | S_IWUSR); 166 int global_cursor_default = -1; 167 module_param(global_cursor_default, int, S_IRUGO | S_IWUSR); 168 169 static int cur_default = CUR_DEFAULT; 170 module_param(cur_default, int, S_IRUGO | S_IWUSR); 171 172 /* 173 * ignore_poke: don't unblank the screen when things are typed. This is 174 * mainly for the privacy of braille terminal users. 175 */ 176 static int ignore_poke; 177 178 int do_poke_blanked_console; 179 int console_blanked; 180 181 static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */ 182 static int vesa_off_interval; 183 static int blankinterval = 10*60; 184 core_param(consoleblank, blankinterval, int, 0444); 185 186 static DECLARE_WORK(console_work, console_callback); 187 188 /* 189 * fg_console is the current virtual console, 190 * last_console is the last used one, 191 * want_console is the console we want to switch to, 192 * saved_* variants are for save/restore around kernel debugger enter/leave 193 */ 194 int fg_console; 195 int last_console; 196 int want_console = -1; 197 static int saved_fg_console; 198 static int saved_last_console; 199 static int saved_want_console; 200 static int saved_vc_mode; 201 static int saved_console_blanked; 202 203 /* 204 * For each existing display, we have a pointer to console currently visible 205 * on that display, allowing consoles other than fg_console to be refreshed 206 * appropriately. Unless the low-level driver supplies its own display_fg 207 * variable, we use this one for the "master display". 208 */ 209 static struct vc_data *master_display_fg; 210 211 /* 212 * Unfortunately, we need to delay tty echo when we're currently writing to the 213 * console since the code is (and always was) not re-entrant, so we schedule 214 * all flip requests to process context with schedule-task() and run it from 215 * console_callback(). 216 */ 217 218 /* 219 * For the same reason, we defer scrollback to the console callback. 220 */ 221 static int scrollback_delta; 222 223 /* 224 * Hook so that the power management routines can (un)blank 225 * the console on our behalf. 226 */ 227 int (*console_blank_hook)(int); 228 229 static DEFINE_TIMER(console_timer, blank_screen_t, 0, 0); 230 static int blank_state; 231 static int blank_timer_expired; 232 enum { 233 blank_off = 0, 234 blank_normal_wait, 235 blank_vesa_wait, 236 }; 237 238 /* 239 * /sys/class/tty/tty0/ 240 * 241 * the attribute 'active' contains the name of the current vc 242 * console and it supports poll() to detect vc switches 243 */ 244 static struct device *tty0dev; 245 246 /* 247 * Notifier list for console events. 248 */ 249 static ATOMIC_NOTIFIER_HEAD(vt_notifier_list); 250 251 int register_vt_notifier(struct notifier_block *nb) 252 { 253 return atomic_notifier_chain_register(&vt_notifier_list, nb); 254 } 255 EXPORT_SYMBOL_GPL(register_vt_notifier); 256 257 int unregister_vt_notifier(struct notifier_block *nb) 258 { 259 return atomic_notifier_chain_unregister(&vt_notifier_list, nb); 260 } 261 EXPORT_SYMBOL_GPL(unregister_vt_notifier); 262 263 static void notify_write(struct vc_data *vc, unsigned int unicode) 264 { 265 struct vt_notifier_param param = { .vc = vc, unicode = unicode }; 266 atomic_notifier_call_chain(&vt_notifier_list, VT_WRITE, ¶m); 267 } 268 269 static void notify_update(struct vc_data *vc) 270 { 271 struct vt_notifier_param param = { .vc = vc }; 272 atomic_notifier_call_chain(&vt_notifier_list, VT_UPDATE, ¶m); 273 } 274 /* 275 * Low-Level Functions 276 */ 277 278 #define IS_FG(vc) ((vc)->vc_num == fg_console) 279 280 #ifdef VT_BUF_VRAM_ONLY 281 #define DO_UPDATE(vc) 0 282 #else 283 #define DO_UPDATE(vc) (CON_IS_VISIBLE(vc) && !console_blanked) 284 #endif 285 286 static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed) 287 { 288 unsigned short *p; 289 290 if (!viewed) 291 p = (unsigned short *)(vc->vc_origin + offset); 292 else if (!vc->vc_sw->con_screen_pos) 293 p = (unsigned short *)(vc->vc_visible_origin + offset); 294 else 295 p = vc->vc_sw->con_screen_pos(vc, offset); 296 return p; 297 } 298 299 /* Called from the keyboard irq path.. */ 300 static inline void scrolldelta(int lines) 301 { 302 /* FIXME */ 303 /* scrolldelta needs some kind of consistency lock, but the BKL was 304 and still is not protecting versus the scheduled back end */ 305 scrollback_delta += lines; 306 schedule_console_callback(); 307 } 308 309 void schedule_console_callback(void) 310 { 311 schedule_work(&console_work); 312 } 313 314 static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr) 315 { 316 unsigned short *d, *s; 317 318 if (t+nr >= b) 319 nr = b - t - 1; 320 if (b > vc->vc_rows || t >= b || nr < 1) 321 return; 322 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr)) 323 return; 324 d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t); 325 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr)); 326 scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row); 327 scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_video_erase_char, 328 vc->vc_size_row * nr); 329 } 330 331 static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr) 332 { 333 unsigned short *s; 334 unsigned int step; 335 336 if (t+nr >= b) 337 nr = b - t - 1; 338 if (b > vc->vc_rows || t >= b || nr < 1) 339 return; 340 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr)) 341 return; 342 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t); 343 step = vc->vc_cols * nr; 344 scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row); 345 scr_memsetw(s, vc->vc_video_erase_char, 2 * step); 346 } 347 348 static void do_update_region(struct vc_data *vc, unsigned long start, int count) 349 { 350 #ifndef VT_BUF_VRAM_ONLY 351 unsigned int xx, yy, offset; 352 u16 *p; 353 354 p = (u16 *) start; 355 if (!vc->vc_sw->con_getxy) { 356 offset = (start - vc->vc_origin) / 2; 357 xx = offset % vc->vc_cols; 358 yy = offset / vc->vc_cols; 359 } else { 360 int nxx, nyy; 361 start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy); 362 xx = nxx; yy = nyy; 363 } 364 for(;;) { 365 u16 attrib = scr_readw(p) & 0xff00; 366 int startx = xx; 367 u16 *q = p; 368 while (xx < vc->vc_cols && count) { 369 if (attrib != (scr_readw(p) & 0xff00)) { 370 if (p > q) 371 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx); 372 startx = xx; 373 q = p; 374 attrib = scr_readw(p) & 0xff00; 375 } 376 p++; 377 xx++; 378 count--; 379 } 380 if (p > q) 381 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx); 382 if (!count) 383 break; 384 xx = 0; 385 yy++; 386 if (vc->vc_sw->con_getxy) { 387 p = (u16 *)start; 388 start = vc->vc_sw->con_getxy(vc, start, NULL, NULL); 389 } 390 } 391 #endif 392 } 393 394 void update_region(struct vc_data *vc, unsigned long start, int count) 395 { 396 WARN_CONSOLE_UNLOCKED(); 397 398 if (DO_UPDATE(vc)) { 399 hide_cursor(vc); 400 do_update_region(vc, start, count); 401 set_cursor(vc); 402 } 403 } 404 405 /* Structure of attributes is hardware-dependent */ 406 407 static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink, 408 u8 _underline, u8 _reverse, u8 _italic) 409 { 410 if (vc->vc_sw->con_build_attr) 411 return vc->vc_sw->con_build_attr(vc, _color, _intensity, 412 _blink, _underline, _reverse, _italic); 413 414 #ifndef VT_BUF_VRAM_ONLY 415 /* 416 * ++roman: I completely changed the attribute format for monochrome 417 * mode (!can_do_color). The formerly used MDA (monochrome display 418 * adapter) format didn't allow the combination of certain effects. 419 * Now the attribute is just a bit vector: 420 * Bit 0..1: intensity (0..2) 421 * Bit 2 : underline 422 * Bit 3 : reverse 423 * Bit 7 : blink 424 */ 425 { 426 u8 a = _color; 427 if (!vc->vc_can_do_color) 428 return _intensity | 429 (_italic ? 2 : 0) | 430 (_underline ? 4 : 0) | 431 (_reverse ? 8 : 0) | 432 (_blink ? 0x80 : 0); 433 if (_italic) 434 a = (a & 0xF0) | vc->vc_itcolor; 435 else if (_underline) 436 a = (a & 0xf0) | vc->vc_ulcolor; 437 else if (_intensity == 0) 438 a = (a & 0xf0) | vc->vc_ulcolor; 439 if (_reverse) 440 a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77); 441 if (_blink) 442 a ^= 0x80; 443 if (_intensity == 2) 444 a ^= 0x08; 445 if (vc->vc_hi_font_mask == 0x100) 446 a <<= 1; 447 return a; 448 } 449 #else 450 return 0; 451 #endif 452 } 453 454 static void update_attr(struct vc_data *vc) 455 { 456 vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity, 457 vc->vc_blink, vc->vc_underline, 458 vc->vc_reverse ^ vc->vc_decscnm, vc->vc_italic); 459 vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm, 0) << 8) | ' '; 460 } 461 462 /* Note: inverting the screen twice should revert to the original state */ 463 void invert_screen(struct vc_data *vc, int offset, int count, int viewed) 464 { 465 unsigned short *p; 466 467 WARN_CONSOLE_UNLOCKED(); 468 469 count /= 2; 470 p = screenpos(vc, offset, viewed); 471 if (vc->vc_sw->con_invert_region) 472 vc->vc_sw->con_invert_region(vc, p, count); 473 #ifndef VT_BUF_VRAM_ONLY 474 else { 475 u16 *q = p; 476 int cnt = count; 477 u16 a; 478 479 if (!vc->vc_can_do_color) { 480 while (cnt--) { 481 a = scr_readw(q); 482 a ^= 0x0800; 483 scr_writew(a, q); 484 q++; 485 } 486 } else if (vc->vc_hi_font_mask == 0x100) { 487 while (cnt--) { 488 a = scr_readw(q); 489 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4); 490 scr_writew(a, q); 491 q++; 492 } 493 } else { 494 while (cnt--) { 495 a = scr_readw(q); 496 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4); 497 scr_writew(a, q); 498 q++; 499 } 500 } 501 } 502 #endif 503 if (DO_UPDATE(vc)) 504 do_update_region(vc, (unsigned long) p, count); 505 } 506 507 /* used by selection: complement pointer position */ 508 void complement_pos(struct vc_data *vc, int offset) 509 { 510 static int old_offset = -1; 511 static unsigned short old; 512 static unsigned short oldx, oldy; 513 514 WARN_CONSOLE_UNLOCKED(); 515 516 if (old_offset != -1 && old_offset >= 0 && 517 old_offset < vc->vc_screenbuf_size) { 518 scr_writew(old, screenpos(vc, old_offset, 1)); 519 if (DO_UPDATE(vc)) 520 vc->vc_sw->con_putc(vc, old, oldy, oldx); 521 } 522 523 old_offset = offset; 524 525 if (offset != -1 && offset >= 0 && 526 offset < vc->vc_screenbuf_size) { 527 unsigned short new; 528 unsigned short *p; 529 p = screenpos(vc, offset, 1); 530 old = scr_readw(p); 531 new = old ^ vc->vc_complement_mask; 532 scr_writew(new, p); 533 if (DO_UPDATE(vc)) { 534 oldx = (offset >> 1) % vc->vc_cols; 535 oldy = (offset >> 1) / vc->vc_cols; 536 vc->vc_sw->con_putc(vc, new, oldy, oldx); 537 } 538 } 539 540 } 541 542 static void insert_char(struct vc_data *vc, unsigned int nr) 543 { 544 unsigned short *p, *q = (unsigned short *)vc->vc_pos; 545 546 p = q + vc->vc_cols - nr - vc->vc_x; 547 while (--p >= q) 548 scr_writew(scr_readw(p), p + nr); 549 scr_memsetw(q, vc->vc_video_erase_char, nr * 2); 550 vc->vc_need_wrap = 0; 551 if (DO_UPDATE(vc)) { 552 unsigned short oldattr = vc->vc_attr; 553 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x, vc->vc_y, vc->vc_x + nr, 1, 554 vc->vc_cols - vc->vc_x - nr); 555 vc->vc_attr = vc->vc_video_erase_char >> 8; 556 while (nr--) 557 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y, vc->vc_x + nr); 558 vc->vc_attr = oldattr; 559 } 560 } 561 562 static void delete_char(struct vc_data *vc, unsigned int nr) 563 { 564 unsigned int i = vc->vc_x; 565 unsigned short *p = (unsigned short *)vc->vc_pos; 566 567 while (++i <= vc->vc_cols - nr) { 568 scr_writew(scr_readw(p+nr), p); 569 p++; 570 } 571 scr_memsetw(p, vc->vc_video_erase_char, nr * 2); 572 vc->vc_need_wrap = 0; 573 if (DO_UPDATE(vc)) { 574 unsigned short oldattr = vc->vc_attr; 575 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x + nr, vc->vc_y, vc->vc_x, 1, 576 vc->vc_cols - vc->vc_x - nr); 577 vc->vc_attr = vc->vc_video_erase_char >> 8; 578 while (nr--) 579 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y, 580 vc->vc_cols - 1 - nr); 581 vc->vc_attr = oldattr; 582 } 583 } 584 585 static int softcursor_original; 586 587 static void add_softcursor(struct vc_data *vc) 588 { 589 int i = scr_readw((u16 *) vc->vc_pos); 590 u32 type = vc->vc_cursor_type; 591 592 if (! (type & 0x10)) return; 593 if (softcursor_original != -1) return; 594 softcursor_original = i; 595 i |= ((type >> 8) & 0xff00 ); 596 i ^= ((type) & 0xff00 ); 597 if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000; 598 if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700; 599 scr_writew(i, (u16 *) vc->vc_pos); 600 if (DO_UPDATE(vc)) 601 vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x); 602 } 603 604 static void hide_softcursor(struct vc_data *vc) 605 { 606 if (softcursor_original != -1) { 607 scr_writew(softcursor_original, (u16 *)vc->vc_pos); 608 if (DO_UPDATE(vc)) 609 vc->vc_sw->con_putc(vc, softcursor_original, 610 vc->vc_y, vc->vc_x); 611 softcursor_original = -1; 612 } 613 } 614 615 static void hide_cursor(struct vc_data *vc) 616 { 617 if (vc == sel_cons) 618 clear_selection(); 619 vc->vc_sw->con_cursor(vc, CM_ERASE); 620 hide_softcursor(vc); 621 } 622 623 static void set_cursor(struct vc_data *vc) 624 { 625 if (!IS_FG(vc) || console_blanked || 626 vc->vc_mode == KD_GRAPHICS) 627 return; 628 if (vc->vc_deccm) { 629 if (vc == sel_cons) 630 clear_selection(); 631 add_softcursor(vc); 632 if ((vc->vc_cursor_type & 0x0f) != 1) 633 vc->vc_sw->con_cursor(vc, CM_DRAW); 634 } else 635 hide_cursor(vc); 636 } 637 638 static void set_origin(struct vc_data *vc) 639 { 640 WARN_CONSOLE_UNLOCKED(); 641 642 if (!CON_IS_VISIBLE(vc) || 643 !vc->vc_sw->con_set_origin || 644 !vc->vc_sw->con_set_origin(vc)) 645 vc->vc_origin = (unsigned long)vc->vc_screenbuf; 646 vc->vc_visible_origin = vc->vc_origin; 647 vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size; 648 vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x; 649 } 650 651 static inline void save_screen(struct vc_data *vc) 652 { 653 WARN_CONSOLE_UNLOCKED(); 654 655 if (vc->vc_sw->con_save_screen) 656 vc->vc_sw->con_save_screen(vc); 657 } 658 659 /* 660 * Redrawing of screen 661 */ 662 663 static void clear_buffer_attributes(struct vc_data *vc) 664 { 665 unsigned short *p = (unsigned short *)vc->vc_origin; 666 int count = vc->vc_screenbuf_size / 2; 667 int mask = vc->vc_hi_font_mask | 0xff; 668 669 for (; count > 0; count--, p++) { 670 scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p); 671 } 672 } 673 674 void redraw_screen(struct vc_data *vc, int is_switch) 675 { 676 int redraw = 0; 677 678 WARN_CONSOLE_UNLOCKED(); 679 680 if (!vc) { 681 /* strange ... */ 682 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */ 683 return; 684 } 685 686 if (is_switch) { 687 struct vc_data *old_vc = vc_cons[fg_console].d; 688 if (old_vc == vc) 689 return; 690 if (!CON_IS_VISIBLE(vc)) 691 redraw = 1; 692 *vc->vc_display_fg = vc; 693 fg_console = vc->vc_num; 694 hide_cursor(old_vc); 695 if (!CON_IS_VISIBLE(old_vc)) { 696 save_screen(old_vc); 697 set_origin(old_vc); 698 } 699 if (tty0dev) 700 sysfs_notify(&tty0dev->kobj, NULL, "active"); 701 } else { 702 hide_cursor(vc); 703 redraw = 1; 704 } 705 706 if (redraw) { 707 int update; 708 int old_was_color = vc->vc_can_do_color; 709 710 set_origin(vc); 711 update = vc->vc_sw->con_switch(vc); 712 set_palette(vc); 713 /* 714 * If console changed from mono<->color, the best we can do 715 * is to clear the buffer attributes. As it currently stands, 716 * rebuilding new attributes from the old buffer is not doable 717 * without overly complex code. 718 */ 719 if (old_was_color != vc->vc_can_do_color) { 720 update_attr(vc); 721 clear_buffer_attributes(vc); 722 } 723 724 /* Forcibly update if we're panicing */ 725 if ((update && vc->vc_mode != KD_GRAPHICS) || 726 vt_force_oops_output(vc)) 727 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2); 728 } 729 set_cursor(vc); 730 if (is_switch) { 731 set_leds(); 732 compute_shiftstate(); 733 notify_update(vc); 734 } 735 } 736 737 /* 738 * Allocation, freeing and resizing of VTs. 739 */ 740 741 int vc_cons_allocated(unsigned int i) 742 { 743 return (i < MAX_NR_CONSOLES && vc_cons[i].d); 744 } 745 746 static void visual_init(struct vc_data *vc, int num, int init) 747 { 748 /* ++Geert: vc->vc_sw->con_init determines console size */ 749 if (vc->vc_sw) 750 module_put(vc->vc_sw->owner); 751 vc->vc_sw = conswitchp; 752 #ifndef VT_SINGLE_DRIVER 753 if (con_driver_map[num]) 754 vc->vc_sw = con_driver_map[num]; 755 #endif 756 __module_get(vc->vc_sw->owner); 757 vc->vc_num = num; 758 vc->vc_display_fg = &master_display_fg; 759 vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir; 760 vc->vc_uni_pagedir = 0; 761 vc->vc_hi_font_mask = 0; 762 vc->vc_complement_mask = 0; 763 vc->vc_can_do_color = 0; 764 vc->vc_panic_force_write = false; 765 vc->vc_sw->con_init(vc, init); 766 if (!vc->vc_complement_mask) 767 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 768 vc->vc_s_complement_mask = vc->vc_complement_mask; 769 vc->vc_size_row = vc->vc_cols << 1; 770 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row; 771 } 772 773 int vc_allocate(unsigned int currcons) /* return 0 on success */ 774 { 775 WARN_CONSOLE_UNLOCKED(); 776 777 if (currcons >= MAX_NR_CONSOLES) 778 return -ENXIO; 779 if (!vc_cons[currcons].d) { 780 struct vc_data *vc; 781 struct vt_notifier_param param; 782 783 /* prevent users from taking too much memory */ 784 if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE)) 785 return -EPERM; 786 787 /* due to the granularity of kmalloc, we waste some memory here */ 788 /* the alloc is done in two steps, to optimize the common situation 789 of a 25x80 console (structsize=216, screenbuf_size=4000) */ 790 /* although the numbers above are not valid since long ago, the 791 point is still up-to-date and the comment still has its value 792 even if only as a historical artifact. --mj, July 1998 */ 793 param.vc = vc = kzalloc(sizeof(struct vc_data), GFP_KERNEL); 794 if (!vc) 795 return -ENOMEM; 796 vc_cons[currcons].d = vc; 797 tty_port_init(&vc->port); 798 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK); 799 visual_init(vc, currcons, 1); 800 if (!*vc->vc_uni_pagedir_loc) 801 con_set_default_unimap(vc); 802 vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL); 803 if (!vc->vc_screenbuf) { 804 kfree(vc); 805 vc_cons[currcons].d = NULL; 806 return -ENOMEM; 807 } 808 809 /* If no drivers have overridden us and the user didn't pass a 810 boot option, default to displaying the cursor */ 811 if (global_cursor_default == -1) 812 global_cursor_default = 1; 813 814 vc_init(vc, vc->vc_rows, vc->vc_cols, 1); 815 vcs_make_sysfs(currcons); 816 atomic_notifier_call_chain(&vt_notifier_list, VT_ALLOCATE, ¶m); 817 } 818 return 0; 819 } 820 821 static inline int resize_screen(struct vc_data *vc, int width, int height, 822 int user) 823 { 824 /* Resizes the resolution of the display adapater */ 825 int err = 0; 826 827 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize) 828 err = vc->vc_sw->con_resize(vc, width, height, user); 829 830 return err; 831 } 832 833 /* 834 * Change # of rows and columns (0 means unchanged/the size of fg_console) 835 * [this is to be used together with some user program 836 * like resize that changes the hardware videomode] 837 */ 838 #define VC_RESIZE_MAXCOL (32767) 839 #define VC_RESIZE_MAXROW (32767) 840 841 /** 842 * vc_do_resize - resizing method for the tty 843 * @tty: tty being resized 844 * @real_tty: real tty (different to tty if a pty/tty pair) 845 * @vc: virtual console private data 846 * @cols: columns 847 * @lines: lines 848 * 849 * Resize a virtual console, clipping according to the actual constraints. 850 * If the caller passes a tty structure then update the termios winsize 851 * information and perform any necessary signal handling. 852 * 853 * Caller must hold the console semaphore. Takes the termios mutex and 854 * ctrl_lock of the tty IFF a tty is passed. 855 */ 856 857 static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc, 858 unsigned int cols, unsigned int lines) 859 { 860 unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0; 861 unsigned long end; 862 unsigned int old_cols, old_rows, old_row_size, old_screen_size; 863 unsigned int new_cols, new_rows, new_row_size, new_screen_size; 864 unsigned int user; 865 unsigned short *newscreen; 866 867 WARN_CONSOLE_UNLOCKED(); 868 869 if (!vc) 870 return -ENXIO; 871 872 user = vc->vc_resize_user; 873 vc->vc_resize_user = 0; 874 875 if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW) 876 return -EINVAL; 877 878 new_cols = (cols ? cols : vc->vc_cols); 879 new_rows = (lines ? lines : vc->vc_rows); 880 new_row_size = new_cols << 1; 881 new_screen_size = new_row_size * new_rows; 882 883 if (new_cols == vc->vc_cols && new_rows == vc->vc_rows) 884 return 0; 885 886 newscreen = kmalloc(new_screen_size, GFP_USER); 887 if (!newscreen) 888 return -ENOMEM; 889 890 old_rows = vc->vc_rows; 891 old_cols = vc->vc_cols; 892 old_row_size = vc->vc_size_row; 893 old_screen_size = vc->vc_screenbuf_size; 894 895 err = resize_screen(vc, new_cols, new_rows, user); 896 if (err) { 897 kfree(newscreen); 898 return err; 899 } 900 901 vc->vc_rows = new_rows; 902 vc->vc_cols = new_cols; 903 vc->vc_size_row = new_row_size; 904 vc->vc_screenbuf_size = new_screen_size; 905 906 rlth = min(old_row_size, new_row_size); 907 rrem = new_row_size - rlth; 908 old_origin = vc->vc_origin; 909 new_origin = (long) newscreen; 910 new_scr_end = new_origin + new_screen_size; 911 912 if (vc->vc_y > new_rows) { 913 if (old_rows - vc->vc_y < new_rows) { 914 /* 915 * Cursor near the bottom, copy contents from the 916 * bottom of buffer 917 */ 918 old_origin += (old_rows - new_rows) * old_row_size; 919 } else { 920 /* 921 * Cursor is in no man's land, copy 1/2 screenful 922 * from the top and bottom of cursor position 923 */ 924 old_origin += (vc->vc_y - new_rows/2) * old_row_size; 925 } 926 } 927 928 end = old_origin + old_row_size * min(old_rows, new_rows); 929 930 update_attr(vc); 931 932 while (old_origin < end) { 933 scr_memcpyw((unsigned short *) new_origin, 934 (unsigned short *) old_origin, rlth); 935 if (rrem) 936 scr_memsetw((void *)(new_origin + rlth), 937 vc->vc_video_erase_char, rrem); 938 old_origin += old_row_size; 939 new_origin += new_row_size; 940 } 941 if (new_scr_end > new_origin) 942 scr_memsetw((void *)new_origin, vc->vc_video_erase_char, 943 new_scr_end - new_origin); 944 kfree(vc->vc_screenbuf); 945 vc->vc_screenbuf = newscreen; 946 vc->vc_screenbuf_size = new_screen_size; 947 set_origin(vc); 948 949 /* do part of a reset_terminal() */ 950 vc->vc_top = 0; 951 vc->vc_bottom = vc->vc_rows; 952 gotoxy(vc, vc->vc_x, vc->vc_y); 953 save_cur(vc); 954 955 if (tty) { 956 /* Rewrite the requested winsize data with the actual 957 resulting sizes */ 958 struct winsize ws; 959 memset(&ws, 0, sizeof(ws)); 960 ws.ws_row = vc->vc_rows; 961 ws.ws_col = vc->vc_cols; 962 ws.ws_ypixel = vc->vc_scan_lines; 963 tty_do_resize(tty, &ws); 964 } 965 966 if (CON_IS_VISIBLE(vc)) 967 update_screen(vc); 968 vt_event_post(VT_EVENT_RESIZE, vc->vc_num, vc->vc_num); 969 return err; 970 } 971 972 /** 973 * vc_resize - resize a VT 974 * @vc: virtual console 975 * @cols: columns 976 * @rows: rows 977 * 978 * Resize a virtual console as seen from the console end of things. We 979 * use the common vc_do_resize methods to update the structures. The 980 * caller must hold the console sem to protect console internals and 981 * vc->port.tty 982 */ 983 984 int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int rows) 985 { 986 return vc_do_resize(vc->port.tty, vc, cols, rows); 987 } 988 989 /** 990 * vt_resize - resize a VT 991 * @tty: tty to resize 992 * @ws: winsize attributes 993 * 994 * Resize a virtual terminal. This is called by the tty layer as we 995 * register our own handler for resizing. The mutual helper does all 996 * the actual work. 997 * 998 * Takes the console sem and the called methods then take the tty 999 * termios_mutex and the tty ctrl_lock in that order. 1000 */ 1001 static int vt_resize(struct tty_struct *tty, struct winsize *ws) 1002 { 1003 struct vc_data *vc = tty->driver_data; 1004 int ret; 1005 1006 console_lock(); 1007 ret = vc_do_resize(tty, vc, ws->ws_col, ws->ws_row); 1008 console_unlock(); 1009 return ret; 1010 } 1011 1012 void vc_deallocate(unsigned int currcons) 1013 { 1014 WARN_CONSOLE_UNLOCKED(); 1015 1016 if (vc_cons_allocated(currcons)) { 1017 struct vc_data *vc = vc_cons[currcons].d; 1018 struct vt_notifier_param param = { .vc = vc }; 1019 1020 atomic_notifier_call_chain(&vt_notifier_list, VT_DEALLOCATE, ¶m); 1021 vcs_remove_sysfs(currcons); 1022 vc->vc_sw->con_deinit(vc); 1023 put_pid(vc->vt_pid); 1024 module_put(vc->vc_sw->owner); 1025 kfree(vc->vc_screenbuf); 1026 if (currcons >= MIN_NR_CONSOLES) 1027 kfree(vc); 1028 vc_cons[currcons].d = NULL; 1029 } 1030 } 1031 1032 /* 1033 * VT102 emulator 1034 */ 1035 1036 #define set_kbd(vc, x) set_vc_kbd_mode(kbd_table + (vc)->vc_num, (x)) 1037 #define clr_kbd(vc, x) clr_vc_kbd_mode(kbd_table + (vc)->vc_num, (x)) 1038 #define is_kbd(vc, x) vc_kbd_mode(kbd_table + (vc)->vc_num, (x)) 1039 1040 #define decarm VC_REPEAT 1041 #define decckm VC_CKMODE 1042 #define kbdapplic VC_APPLIC 1043 #define lnm VC_CRLF 1044 1045 /* 1046 * this is what the terminal answers to a ESC-Z or csi0c query. 1047 */ 1048 #define VT100ID "\033[?1;2c" 1049 #define VT102ID "\033[?6c" 1050 1051 unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7, 1052 8,12,10,14, 9,13,11,15 }; 1053 1054 /* the default colour table, for VGA+ colour systems */ 1055 int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa, 1056 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff}; 1057 int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa, 1058 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff}; 1059 int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa, 1060 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff}; 1061 1062 module_param_array(default_red, int, NULL, S_IRUGO | S_IWUSR); 1063 module_param_array(default_grn, int, NULL, S_IRUGO | S_IWUSR); 1064 module_param_array(default_blu, int, NULL, S_IRUGO | S_IWUSR); 1065 1066 /* 1067 * gotoxy() must verify all boundaries, because the arguments 1068 * might also be negative. If the given position is out of 1069 * bounds, the cursor is placed at the nearest margin. 1070 */ 1071 static void gotoxy(struct vc_data *vc, int new_x, int new_y) 1072 { 1073 int min_y, max_y; 1074 1075 if (new_x < 0) 1076 vc->vc_x = 0; 1077 else { 1078 if (new_x >= vc->vc_cols) 1079 vc->vc_x = vc->vc_cols - 1; 1080 else 1081 vc->vc_x = new_x; 1082 } 1083 1084 if (vc->vc_decom) { 1085 min_y = vc->vc_top; 1086 max_y = vc->vc_bottom; 1087 } else { 1088 min_y = 0; 1089 max_y = vc->vc_rows; 1090 } 1091 if (new_y < min_y) 1092 vc->vc_y = min_y; 1093 else if (new_y >= max_y) 1094 vc->vc_y = max_y - 1; 1095 else 1096 vc->vc_y = new_y; 1097 vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1); 1098 vc->vc_need_wrap = 0; 1099 } 1100 1101 /* for absolute user moves, when decom is set */ 1102 static void gotoxay(struct vc_data *vc, int new_x, int new_y) 1103 { 1104 gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y); 1105 } 1106 1107 void scrollback(struct vc_data *vc, int lines) 1108 { 1109 if (!lines) 1110 lines = vc->vc_rows / 2; 1111 scrolldelta(-lines); 1112 } 1113 1114 void scrollfront(struct vc_data *vc, int lines) 1115 { 1116 if (!lines) 1117 lines = vc->vc_rows / 2; 1118 scrolldelta(lines); 1119 } 1120 1121 static void lf(struct vc_data *vc) 1122 { 1123 /* don't scroll if above bottom of scrolling region, or 1124 * if below scrolling region 1125 */ 1126 if (vc->vc_y + 1 == vc->vc_bottom) 1127 scrup(vc, vc->vc_top, vc->vc_bottom, 1); 1128 else if (vc->vc_y < vc->vc_rows - 1) { 1129 vc->vc_y++; 1130 vc->vc_pos += vc->vc_size_row; 1131 } 1132 vc->vc_need_wrap = 0; 1133 notify_write(vc, '\n'); 1134 } 1135 1136 static void ri(struct vc_data *vc) 1137 { 1138 /* don't scroll if below top of scrolling region, or 1139 * if above scrolling region 1140 */ 1141 if (vc->vc_y == vc->vc_top) 1142 scrdown(vc, vc->vc_top, vc->vc_bottom, 1); 1143 else if (vc->vc_y > 0) { 1144 vc->vc_y--; 1145 vc->vc_pos -= vc->vc_size_row; 1146 } 1147 vc->vc_need_wrap = 0; 1148 } 1149 1150 static inline void cr(struct vc_data *vc) 1151 { 1152 vc->vc_pos -= vc->vc_x << 1; 1153 vc->vc_need_wrap = vc->vc_x = 0; 1154 notify_write(vc, '\r'); 1155 } 1156 1157 static inline void bs(struct vc_data *vc) 1158 { 1159 if (vc->vc_x) { 1160 vc->vc_pos -= 2; 1161 vc->vc_x--; 1162 vc->vc_need_wrap = 0; 1163 notify_write(vc, '\b'); 1164 } 1165 } 1166 1167 static inline void del(struct vc_data *vc) 1168 { 1169 /* ignored */ 1170 } 1171 1172 static void csi_J(struct vc_data *vc, int vpar) 1173 { 1174 unsigned int count; 1175 unsigned short * start; 1176 1177 switch (vpar) { 1178 case 0: /* erase from cursor to end of display */ 1179 count = (vc->vc_scr_end - vc->vc_pos) >> 1; 1180 start = (unsigned short *)vc->vc_pos; 1181 if (DO_UPDATE(vc)) { 1182 /* do in two stages */ 1183 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, 1184 vc->vc_cols - vc->vc_x); 1185 vc->vc_sw->con_clear(vc, vc->vc_y + 1, 0, 1186 vc->vc_rows - vc->vc_y - 1, 1187 vc->vc_cols); 1188 } 1189 break; 1190 case 1: /* erase from start to cursor */ 1191 count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1; 1192 start = (unsigned short *)vc->vc_origin; 1193 if (DO_UPDATE(vc)) { 1194 /* do in two stages */ 1195 vc->vc_sw->con_clear(vc, 0, 0, vc->vc_y, 1196 vc->vc_cols); 1197 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1, 1198 vc->vc_x + 1); 1199 } 1200 break; 1201 case 2: /* erase whole display */ 1202 count = vc->vc_cols * vc->vc_rows; 1203 start = (unsigned short *)vc->vc_origin; 1204 if (DO_UPDATE(vc)) 1205 vc->vc_sw->con_clear(vc, 0, 0, 1206 vc->vc_rows, 1207 vc->vc_cols); 1208 break; 1209 default: 1210 return; 1211 } 1212 scr_memsetw(start, vc->vc_video_erase_char, 2 * count); 1213 vc->vc_need_wrap = 0; 1214 } 1215 1216 static void csi_K(struct vc_data *vc, int vpar) 1217 { 1218 unsigned int count; 1219 unsigned short * start; 1220 1221 switch (vpar) { 1222 case 0: /* erase from cursor to end of line */ 1223 count = vc->vc_cols - vc->vc_x; 1224 start = (unsigned short *)vc->vc_pos; 1225 if (DO_UPDATE(vc)) 1226 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, 1227 vc->vc_cols - vc->vc_x); 1228 break; 1229 case 1: /* erase from start of line to cursor */ 1230 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1)); 1231 count = vc->vc_x + 1; 1232 if (DO_UPDATE(vc)) 1233 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1, 1234 vc->vc_x + 1); 1235 break; 1236 case 2: /* erase whole line */ 1237 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1)); 1238 count = vc->vc_cols; 1239 if (DO_UPDATE(vc)) 1240 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1, 1241 vc->vc_cols); 1242 break; 1243 default: 1244 return; 1245 } 1246 scr_memsetw(start, vc->vc_video_erase_char, 2 * count); 1247 vc->vc_need_wrap = 0; 1248 } 1249 1250 static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */ 1251 { /* not vt100? */ 1252 int count; 1253 1254 if (!vpar) 1255 vpar++; 1256 count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar; 1257 1258 scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count); 1259 if (DO_UPDATE(vc)) 1260 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count); 1261 vc->vc_need_wrap = 0; 1262 } 1263 1264 static void default_attr(struct vc_data *vc) 1265 { 1266 vc->vc_intensity = 1; 1267 vc->vc_italic = 0; 1268 vc->vc_underline = 0; 1269 vc->vc_reverse = 0; 1270 vc->vc_blink = 0; 1271 vc->vc_color = vc->vc_def_color; 1272 } 1273 1274 /* console_lock is held */ 1275 static void csi_m(struct vc_data *vc) 1276 { 1277 int i; 1278 1279 for (i = 0; i <= vc->vc_npar; i++) 1280 switch (vc->vc_par[i]) { 1281 case 0: /* all attributes off */ 1282 default_attr(vc); 1283 break; 1284 case 1: 1285 vc->vc_intensity = 2; 1286 break; 1287 case 2: 1288 vc->vc_intensity = 0; 1289 break; 1290 case 3: 1291 vc->vc_italic = 1; 1292 break; 1293 case 4: 1294 vc->vc_underline = 1; 1295 break; 1296 case 5: 1297 vc->vc_blink = 1; 1298 break; 1299 case 7: 1300 vc->vc_reverse = 1; 1301 break; 1302 case 10: /* ANSI X3.64-1979 (SCO-ish?) 1303 * Select primary font, don't display 1304 * control chars if defined, don't set 1305 * bit 8 on output. 1306 */ 1307 vc->vc_translate = set_translate(vc->vc_charset == 0 1308 ? vc->vc_G0_charset 1309 : vc->vc_G1_charset, vc); 1310 vc->vc_disp_ctrl = 0; 1311 vc->vc_toggle_meta = 0; 1312 break; 1313 case 11: /* ANSI X3.64-1979 (SCO-ish?) 1314 * Select first alternate font, lets 1315 * chars < 32 be displayed as ROM chars. 1316 */ 1317 vc->vc_translate = set_translate(IBMPC_MAP, vc); 1318 vc->vc_disp_ctrl = 1; 1319 vc->vc_toggle_meta = 0; 1320 break; 1321 case 12: /* ANSI X3.64-1979 (SCO-ish?) 1322 * Select second alternate font, toggle 1323 * high bit before displaying as ROM char. 1324 */ 1325 vc->vc_translate = set_translate(IBMPC_MAP, vc); 1326 vc->vc_disp_ctrl = 1; 1327 vc->vc_toggle_meta = 1; 1328 break; 1329 case 21: 1330 case 22: 1331 vc->vc_intensity = 1; 1332 break; 1333 case 23: 1334 vc->vc_italic = 0; 1335 break; 1336 case 24: 1337 vc->vc_underline = 0; 1338 break; 1339 case 25: 1340 vc->vc_blink = 0; 1341 break; 1342 case 27: 1343 vc->vc_reverse = 0; 1344 break; 1345 case 38: /* ANSI X3.64-1979 (SCO-ish?) 1346 * Enables underscore, white foreground 1347 * with white underscore (Linux - use 1348 * default foreground). 1349 */ 1350 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0); 1351 vc->vc_underline = 1; 1352 break; 1353 case 39: /* ANSI X3.64-1979 (SCO-ish?) 1354 * Disable underline option. 1355 * Reset colour to default? It did this 1356 * before... 1357 */ 1358 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0); 1359 vc->vc_underline = 0; 1360 break; 1361 case 49: 1362 vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f); 1363 break; 1364 default: 1365 if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37) 1366 vc->vc_color = color_table[vc->vc_par[i] - 30] 1367 | (vc->vc_color & 0xf0); 1368 else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47) 1369 vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4) 1370 | (vc->vc_color & 0x0f); 1371 break; 1372 } 1373 update_attr(vc); 1374 } 1375 1376 static void respond_string(const char *p, struct tty_struct *tty) 1377 { 1378 while (*p) { 1379 tty_insert_flip_char(tty, *p, 0); 1380 p++; 1381 } 1382 con_schedule_flip(tty); 1383 } 1384 1385 static void cursor_report(struct vc_data *vc, struct tty_struct *tty) 1386 { 1387 char buf[40]; 1388 1389 sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1); 1390 respond_string(buf, tty); 1391 } 1392 1393 static inline void status_report(struct tty_struct *tty) 1394 { 1395 respond_string("\033[0n", tty); /* Terminal ok */ 1396 } 1397 1398 static inline void respond_ID(struct tty_struct * tty) 1399 { 1400 respond_string(VT102ID, tty); 1401 } 1402 1403 void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry) 1404 { 1405 char buf[8]; 1406 1407 sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx), 1408 (char)('!' + mry)); 1409 respond_string(buf, tty); 1410 } 1411 1412 /* invoked via ioctl(TIOCLINUX) and through set_selection */ 1413 int mouse_reporting(void) 1414 { 1415 return vc_cons[fg_console].d->vc_report_mouse; 1416 } 1417 1418 /* console_lock is held */ 1419 static void set_mode(struct vc_data *vc, int on_off) 1420 { 1421 int i; 1422 1423 for (i = 0; i <= vc->vc_npar; i++) 1424 if (vc->vc_ques) { 1425 switch(vc->vc_par[i]) { /* DEC private modes set/reset */ 1426 case 1: /* Cursor keys send ^[Ox/^[[x */ 1427 if (on_off) 1428 set_kbd(vc, decckm); 1429 else 1430 clr_kbd(vc, decckm); 1431 break; 1432 case 3: /* 80/132 mode switch unimplemented */ 1433 vc->vc_deccolm = on_off; 1434 #if 0 1435 vc_resize(deccolm ? 132 : 80, vc->vc_rows); 1436 /* this alone does not suffice; some user mode 1437 utility has to change the hardware regs */ 1438 #endif 1439 break; 1440 case 5: /* Inverted screen on/off */ 1441 if (vc->vc_decscnm != on_off) { 1442 vc->vc_decscnm = on_off; 1443 invert_screen(vc, 0, vc->vc_screenbuf_size, 0); 1444 update_attr(vc); 1445 } 1446 break; 1447 case 6: /* Origin relative/absolute */ 1448 vc->vc_decom = on_off; 1449 gotoxay(vc, 0, 0); 1450 break; 1451 case 7: /* Autowrap on/off */ 1452 vc->vc_decawm = on_off; 1453 break; 1454 case 8: /* Autorepeat on/off */ 1455 if (on_off) 1456 set_kbd(vc, decarm); 1457 else 1458 clr_kbd(vc, decarm); 1459 break; 1460 case 9: 1461 vc->vc_report_mouse = on_off ? 1 : 0; 1462 break; 1463 case 25: /* Cursor on/off */ 1464 vc->vc_deccm = on_off; 1465 break; 1466 case 1000: 1467 vc->vc_report_mouse = on_off ? 2 : 0; 1468 break; 1469 } 1470 } else { 1471 switch(vc->vc_par[i]) { /* ANSI modes set/reset */ 1472 case 3: /* Monitor (display ctrls) */ 1473 vc->vc_disp_ctrl = on_off; 1474 break; 1475 case 4: /* Insert Mode on/off */ 1476 vc->vc_decim = on_off; 1477 break; 1478 case 20: /* Lf, Enter == CrLf/Lf */ 1479 if (on_off) 1480 set_kbd(vc, lnm); 1481 else 1482 clr_kbd(vc, lnm); 1483 break; 1484 } 1485 } 1486 } 1487 1488 /* console_lock is held */ 1489 static void setterm_command(struct vc_data *vc) 1490 { 1491 switch(vc->vc_par[0]) { 1492 case 1: /* set color for underline mode */ 1493 if (vc->vc_can_do_color && 1494 vc->vc_par[1] < 16) { 1495 vc->vc_ulcolor = color_table[vc->vc_par[1]]; 1496 if (vc->vc_underline) 1497 update_attr(vc); 1498 } 1499 break; 1500 case 2: /* set color for half intensity mode */ 1501 if (vc->vc_can_do_color && 1502 vc->vc_par[1] < 16) { 1503 vc->vc_halfcolor = color_table[vc->vc_par[1]]; 1504 if (vc->vc_intensity == 0) 1505 update_attr(vc); 1506 } 1507 break; 1508 case 8: /* store colors as defaults */ 1509 vc->vc_def_color = vc->vc_attr; 1510 if (vc->vc_hi_font_mask == 0x100) 1511 vc->vc_def_color >>= 1; 1512 default_attr(vc); 1513 update_attr(vc); 1514 break; 1515 case 9: /* set blanking interval */ 1516 blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60; 1517 poke_blanked_console(); 1518 break; 1519 case 10: /* set bell frequency in Hz */ 1520 if (vc->vc_npar >= 1) 1521 vc->vc_bell_pitch = vc->vc_par[1]; 1522 else 1523 vc->vc_bell_pitch = DEFAULT_BELL_PITCH; 1524 break; 1525 case 11: /* set bell duration in msec */ 1526 if (vc->vc_npar >= 1) 1527 vc->vc_bell_duration = (vc->vc_par[1] < 2000) ? 1528 vc->vc_par[1] * HZ / 1000 : 0; 1529 else 1530 vc->vc_bell_duration = DEFAULT_BELL_DURATION; 1531 break; 1532 case 12: /* bring specified console to the front */ 1533 if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1)) 1534 set_console(vc->vc_par[1] - 1); 1535 break; 1536 case 13: /* unblank the screen */ 1537 poke_blanked_console(); 1538 break; 1539 case 14: /* set vesa powerdown interval */ 1540 vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ; 1541 break; 1542 case 15: /* activate the previous console */ 1543 set_console(last_console); 1544 break; 1545 } 1546 } 1547 1548 /* console_lock is held */ 1549 static void csi_at(struct vc_data *vc, unsigned int nr) 1550 { 1551 if (nr > vc->vc_cols - vc->vc_x) 1552 nr = vc->vc_cols - vc->vc_x; 1553 else if (!nr) 1554 nr = 1; 1555 insert_char(vc, nr); 1556 } 1557 1558 /* console_lock is held */ 1559 static void csi_L(struct vc_data *vc, unsigned int nr) 1560 { 1561 if (nr > vc->vc_rows - vc->vc_y) 1562 nr = vc->vc_rows - vc->vc_y; 1563 else if (!nr) 1564 nr = 1; 1565 scrdown(vc, vc->vc_y, vc->vc_bottom, nr); 1566 vc->vc_need_wrap = 0; 1567 } 1568 1569 /* console_lock is held */ 1570 static void csi_P(struct vc_data *vc, unsigned int nr) 1571 { 1572 if (nr > vc->vc_cols - vc->vc_x) 1573 nr = vc->vc_cols - vc->vc_x; 1574 else if (!nr) 1575 nr = 1; 1576 delete_char(vc, nr); 1577 } 1578 1579 /* console_lock is held */ 1580 static void csi_M(struct vc_data *vc, unsigned int nr) 1581 { 1582 if (nr > vc->vc_rows - vc->vc_y) 1583 nr = vc->vc_rows - vc->vc_y; 1584 else if (!nr) 1585 nr=1; 1586 scrup(vc, vc->vc_y, vc->vc_bottom, nr); 1587 vc->vc_need_wrap = 0; 1588 } 1589 1590 /* console_lock is held (except via vc_init->reset_terminal */ 1591 static void save_cur(struct vc_data *vc) 1592 { 1593 vc->vc_saved_x = vc->vc_x; 1594 vc->vc_saved_y = vc->vc_y; 1595 vc->vc_s_intensity = vc->vc_intensity; 1596 vc->vc_s_italic = vc->vc_italic; 1597 vc->vc_s_underline = vc->vc_underline; 1598 vc->vc_s_blink = vc->vc_blink; 1599 vc->vc_s_reverse = vc->vc_reverse; 1600 vc->vc_s_charset = vc->vc_charset; 1601 vc->vc_s_color = vc->vc_color; 1602 vc->vc_saved_G0 = vc->vc_G0_charset; 1603 vc->vc_saved_G1 = vc->vc_G1_charset; 1604 } 1605 1606 /* console_lock is held */ 1607 static void restore_cur(struct vc_data *vc) 1608 { 1609 gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y); 1610 vc->vc_intensity = vc->vc_s_intensity; 1611 vc->vc_italic = vc->vc_s_italic; 1612 vc->vc_underline = vc->vc_s_underline; 1613 vc->vc_blink = vc->vc_s_blink; 1614 vc->vc_reverse = vc->vc_s_reverse; 1615 vc->vc_charset = vc->vc_s_charset; 1616 vc->vc_color = vc->vc_s_color; 1617 vc->vc_G0_charset = vc->vc_saved_G0; 1618 vc->vc_G1_charset = vc->vc_saved_G1; 1619 vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc); 1620 update_attr(vc); 1621 vc->vc_need_wrap = 0; 1622 } 1623 1624 enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey, 1625 EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd, 1626 ESpalette }; 1627 1628 /* console_lock is held (except via vc_init()) */ 1629 static void reset_terminal(struct vc_data *vc, int do_clear) 1630 { 1631 vc->vc_top = 0; 1632 vc->vc_bottom = vc->vc_rows; 1633 vc->vc_state = ESnormal; 1634 vc->vc_ques = 0; 1635 vc->vc_translate = set_translate(LAT1_MAP, vc); 1636 vc->vc_G0_charset = LAT1_MAP; 1637 vc->vc_G1_charset = GRAF_MAP; 1638 vc->vc_charset = 0; 1639 vc->vc_need_wrap = 0; 1640 vc->vc_report_mouse = 0; 1641 vc->vc_utf = default_utf8; 1642 vc->vc_utf_count = 0; 1643 1644 vc->vc_disp_ctrl = 0; 1645 vc->vc_toggle_meta = 0; 1646 1647 vc->vc_decscnm = 0; 1648 vc->vc_decom = 0; 1649 vc->vc_decawm = 1; 1650 vc->vc_deccm = global_cursor_default; 1651 vc->vc_decim = 0; 1652 1653 set_kbd(vc, decarm); 1654 clr_kbd(vc, decckm); 1655 clr_kbd(vc, kbdapplic); 1656 clr_kbd(vc, lnm); 1657 kbd_table[vc->vc_num].lockstate = 0; 1658 kbd_table[vc->vc_num].slockstate = 0; 1659 kbd_table[vc->vc_num].ledmode = LED_SHOW_FLAGS; 1660 kbd_table[vc->vc_num].ledflagstate = kbd_table[vc->vc_num].default_ledflagstate; 1661 /* do not do set_leds here because this causes an endless tasklet loop 1662 when the keyboard hasn't been initialized yet */ 1663 1664 vc->vc_cursor_type = cur_default; 1665 vc->vc_complement_mask = vc->vc_s_complement_mask; 1666 1667 default_attr(vc); 1668 update_attr(vc); 1669 1670 vc->vc_tab_stop[0] = 0x01010100; 1671 vc->vc_tab_stop[1] = 1672 vc->vc_tab_stop[2] = 1673 vc->vc_tab_stop[3] = 1674 vc->vc_tab_stop[4] = 1675 vc->vc_tab_stop[5] = 1676 vc->vc_tab_stop[6] = 1677 vc->vc_tab_stop[7] = 0x01010101; 1678 1679 vc->vc_bell_pitch = DEFAULT_BELL_PITCH; 1680 vc->vc_bell_duration = DEFAULT_BELL_DURATION; 1681 1682 gotoxy(vc, 0, 0); 1683 save_cur(vc); 1684 if (do_clear) 1685 csi_J(vc, 2); 1686 } 1687 1688 /* console_lock is held */ 1689 static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c) 1690 { 1691 /* 1692 * Control characters can be used in the _middle_ 1693 * of an escape sequence. 1694 */ 1695 switch (c) { 1696 case 0: 1697 return; 1698 case 7: 1699 if (vc->vc_bell_duration) 1700 kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration); 1701 return; 1702 case 8: 1703 bs(vc); 1704 return; 1705 case 9: 1706 vc->vc_pos -= (vc->vc_x << 1); 1707 while (vc->vc_x < vc->vc_cols - 1) { 1708 vc->vc_x++; 1709 if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31))) 1710 break; 1711 } 1712 vc->vc_pos += (vc->vc_x << 1); 1713 notify_write(vc, '\t'); 1714 return; 1715 case 10: case 11: case 12: 1716 lf(vc); 1717 if (!is_kbd(vc, lnm)) 1718 return; 1719 case 13: 1720 cr(vc); 1721 return; 1722 case 14: 1723 vc->vc_charset = 1; 1724 vc->vc_translate = set_translate(vc->vc_G1_charset, vc); 1725 vc->vc_disp_ctrl = 1; 1726 return; 1727 case 15: 1728 vc->vc_charset = 0; 1729 vc->vc_translate = set_translate(vc->vc_G0_charset, vc); 1730 vc->vc_disp_ctrl = 0; 1731 return; 1732 case 24: case 26: 1733 vc->vc_state = ESnormal; 1734 return; 1735 case 27: 1736 vc->vc_state = ESesc; 1737 return; 1738 case 127: 1739 del(vc); 1740 return; 1741 case 128+27: 1742 vc->vc_state = ESsquare; 1743 return; 1744 } 1745 switch(vc->vc_state) { 1746 case ESesc: 1747 vc->vc_state = ESnormal; 1748 switch (c) { 1749 case '[': 1750 vc->vc_state = ESsquare; 1751 return; 1752 case ']': 1753 vc->vc_state = ESnonstd; 1754 return; 1755 case '%': 1756 vc->vc_state = ESpercent; 1757 return; 1758 case 'E': 1759 cr(vc); 1760 lf(vc); 1761 return; 1762 case 'M': 1763 ri(vc); 1764 return; 1765 case 'D': 1766 lf(vc); 1767 return; 1768 case 'H': 1769 vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31)); 1770 return; 1771 case 'Z': 1772 respond_ID(tty); 1773 return; 1774 case '7': 1775 save_cur(vc); 1776 return; 1777 case '8': 1778 restore_cur(vc); 1779 return; 1780 case '(': 1781 vc->vc_state = ESsetG0; 1782 return; 1783 case ')': 1784 vc->vc_state = ESsetG1; 1785 return; 1786 case '#': 1787 vc->vc_state = EShash; 1788 return; 1789 case 'c': 1790 reset_terminal(vc, 1); 1791 return; 1792 case '>': /* Numeric keypad */ 1793 clr_kbd(vc, kbdapplic); 1794 return; 1795 case '=': /* Appl. keypad */ 1796 set_kbd(vc, kbdapplic); 1797 return; 1798 } 1799 return; 1800 case ESnonstd: 1801 if (c=='P') { /* palette escape sequence */ 1802 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++) 1803 vc->vc_par[vc->vc_npar] = 0; 1804 vc->vc_npar = 0; 1805 vc->vc_state = ESpalette; 1806 return; 1807 } else if (c=='R') { /* reset palette */ 1808 reset_palette(vc); 1809 vc->vc_state = ESnormal; 1810 } else 1811 vc->vc_state = ESnormal; 1812 return; 1813 case ESpalette: 1814 if (isxdigit(c)) { 1815 vc->vc_par[vc->vc_npar++] = hex_to_bin(c); 1816 if (vc->vc_npar == 7) { 1817 int i = vc->vc_par[0] * 3, j = 1; 1818 vc->vc_palette[i] = 16 * vc->vc_par[j++]; 1819 vc->vc_palette[i++] += vc->vc_par[j++]; 1820 vc->vc_palette[i] = 16 * vc->vc_par[j++]; 1821 vc->vc_palette[i++] += vc->vc_par[j++]; 1822 vc->vc_palette[i] = 16 * vc->vc_par[j++]; 1823 vc->vc_palette[i] += vc->vc_par[j]; 1824 set_palette(vc); 1825 vc->vc_state = ESnormal; 1826 } 1827 } else 1828 vc->vc_state = ESnormal; 1829 return; 1830 case ESsquare: 1831 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++) 1832 vc->vc_par[vc->vc_npar] = 0; 1833 vc->vc_npar = 0; 1834 vc->vc_state = ESgetpars; 1835 if (c == '[') { /* Function key */ 1836 vc->vc_state=ESfunckey; 1837 return; 1838 } 1839 vc->vc_ques = (c == '?'); 1840 if (vc->vc_ques) 1841 return; 1842 case ESgetpars: 1843 if (c == ';' && vc->vc_npar < NPAR - 1) { 1844 vc->vc_npar++; 1845 return; 1846 } else if (c>='0' && c<='9') { 1847 vc->vc_par[vc->vc_npar] *= 10; 1848 vc->vc_par[vc->vc_npar] += c - '0'; 1849 return; 1850 } else 1851 vc->vc_state = ESgotpars; 1852 case ESgotpars: 1853 vc->vc_state = ESnormal; 1854 switch(c) { 1855 case 'h': 1856 set_mode(vc, 1); 1857 return; 1858 case 'l': 1859 set_mode(vc, 0); 1860 return; 1861 case 'c': 1862 if (vc->vc_ques) { 1863 if (vc->vc_par[0]) 1864 vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16); 1865 else 1866 vc->vc_cursor_type = cur_default; 1867 return; 1868 } 1869 break; 1870 case 'm': 1871 if (vc->vc_ques) { 1872 clear_selection(); 1873 if (vc->vc_par[0]) 1874 vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1]; 1875 else 1876 vc->vc_complement_mask = vc->vc_s_complement_mask; 1877 return; 1878 } 1879 break; 1880 case 'n': 1881 if (!vc->vc_ques) { 1882 if (vc->vc_par[0] == 5) 1883 status_report(tty); 1884 else if (vc->vc_par[0] == 6) 1885 cursor_report(vc, tty); 1886 } 1887 return; 1888 } 1889 if (vc->vc_ques) { 1890 vc->vc_ques = 0; 1891 return; 1892 } 1893 switch(c) { 1894 case 'G': case '`': 1895 if (vc->vc_par[0]) 1896 vc->vc_par[0]--; 1897 gotoxy(vc, vc->vc_par[0], vc->vc_y); 1898 return; 1899 case 'A': 1900 if (!vc->vc_par[0]) 1901 vc->vc_par[0]++; 1902 gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]); 1903 return; 1904 case 'B': case 'e': 1905 if (!vc->vc_par[0]) 1906 vc->vc_par[0]++; 1907 gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]); 1908 return; 1909 case 'C': case 'a': 1910 if (!vc->vc_par[0]) 1911 vc->vc_par[0]++; 1912 gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y); 1913 return; 1914 case 'D': 1915 if (!vc->vc_par[0]) 1916 vc->vc_par[0]++; 1917 gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y); 1918 return; 1919 case 'E': 1920 if (!vc->vc_par[0]) 1921 vc->vc_par[0]++; 1922 gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]); 1923 return; 1924 case 'F': 1925 if (!vc->vc_par[0]) 1926 vc->vc_par[0]++; 1927 gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]); 1928 return; 1929 case 'd': 1930 if (vc->vc_par[0]) 1931 vc->vc_par[0]--; 1932 gotoxay(vc, vc->vc_x ,vc->vc_par[0]); 1933 return; 1934 case 'H': case 'f': 1935 if (vc->vc_par[0]) 1936 vc->vc_par[0]--; 1937 if (vc->vc_par[1]) 1938 vc->vc_par[1]--; 1939 gotoxay(vc, vc->vc_par[1], vc->vc_par[0]); 1940 return; 1941 case 'J': 1942 csi_J(vc, vc->vc_par[0]); 1943 return; 1944 case 'K': 1945 csi_K(vc, vc->vc_par[0]); 1946 return; 1947 case 'L': 1948 csi_L(vc, vc->vc_par[0]); 1949 return; 1950 case 'M': 1951 csi_M(vc, vc->vc_par[0]); 1952 return; 1953 case 'P': 1954 csi_P(vc, vc->vc_par[0]); 1955 return; 1956 case 'c': 1957 if (!vc->vc_par[0]) 1958 respond_ID(tty); 1959 return; 1960 case 'g': 1961 if (!vc->vc_par[0]) 1962 vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31)); 1963 else if (vc->vc_par[0] == 3) { 1964 vc->vc_tab_stop[0] = 1965 vc->vc_tab_stop[1] = 1966 vc->vc_tab_stop[2] = 1967 vc->vc_tab_stop[3] = 1968 vc->vc_tab_stop[4] = 1969 vc->vc_tab_stop[5] = 1970 vc->vc_tab_stop[6] = 1971 vc->vc_tab_stop[7] = 0; 1972 } 1973 return; 1974 case 'm': 1975 csi_m(vc); 1976 return; 1977 case 'q': /* DECLL - but only 3 leds */ 1978 /* map 0,1,2,3 to 0,1,2,4 */ 1979 if (vc->vc_par[0] < 4) 1980 setledstate(kbd_table + vc->vc_num, 1981 (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4); 1982 return; 1983 case 'r': 1984 if (!vc->vc_par[0]) 1985 vc->vc_par[0]++; 1986 if (!vc->vc_par[1]) 1987 vc->vc_par[1] = vc->vc_rows; 1988 /* Minimum allowed region is 2 lines */ 1989 if (vc->vc_par[0] < vc->vc_par[1] && 1990 vc->vc_par[1] <= vc->vc_rows) { 1991 vc->vc_top = vc->vc_par[0] - 1; 1992 vc->vc_bottom = vc->vc_par[1]; 1993 gotoxay(vc, 0, 0); 1994 } 1995 return; 1996 case 's': 1997 save_cur(vc); 1998 return; 1999 case 'u': 2000 restore_cur(vc); 2001 return; 2002 case 'X': 2003 csi_X(vc, vc->vc_par[0]); 2004 return; 2005 case '@': 2006 csi_at(vc, vc->vc_par[0]); 2007 return; 2008 case ']': /* setterm functions */ 2009 setterm_command(vc); 2010 return; 2011 } 2012 return; 2013 case ESpercent: 2014 vc->vc_state = ESnormal; 2015 switch (c) { 2016 case '@': /* defined in ISO 2022 */ 2017 vc->vc_utf = 0; 2018 return; 2019 case 'G': /* prelim official escape code */ 2020 case '8': /* retained for compatibility */ 2021 vc->vc_utf = 1; 2022 return; 2023 } 2024 return; 2025 case ESfunckey: 2026 vc->vc_state = ESnormal; 2027 return; 2028 case EShash: 2029 vc->vc_state = ESnormal; 2030 if (c == '8') { 2031 /* DEC screen alignment test. kludge :-) */ 2032 vc->vc_video_erase_char = 2033 (vc->vc_video_erase_char & 0xff00) | 'E'; 2034 csi_J(vc, 2); 2035 vc->vc_video_erase_char = 2036 (vc->vc_video_erase_char & 0xff00) | ' '; 2037 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2); 2038 } 2039 return; 2040 case ESsetG0: 2041 if (c == '0') 2042 vc->vc_G0_charset = GRAF_MAP; 2043 else if (c == 'B') 2044 vc->vc_G0_charset = LAT1_MAP; 2045 else if (c == 'U') 2046 vc->vc_G0_charset = IBMPC_MAP; 2047 else if (c == 'K') 2048 vc->vc_G0_charset = USER_MAP; 2049 if (vc->vc_charset == 0) 2050 vc->vc_translate = set_translate(vc->vc_G0_charset, vc); 2051 vc->vc_state = ESnormal; 2052 return; 2053 case ESsetG1: 2054 if (c == '0') 2055 vc->vc_G1_charset = GRAF_MAP; 2056 else if (c == 'B') 2057 vc->vc_G1_charset = LAT1_MAP; 2058 else if (c == 'U') 2059 vc->vc_G1_charset = IBMPC_MAP; 2060 else if (c == 'K') 2061 vc->vc_G1_charset = USER_MAP; 2062 if (vc->vc_charset == 1) 2063 vc->vc_translate = set_translate(vc->vc_G1_charset, vc); 2064 vc->vc_state = ESnormal; 2065 return; 2066 default: 2067 vc->vc_state = ESnormal; 2068 } 2069 } 2070 2071 /* This is a temporary buffer used to prepare a tty console write 2072 * so that we can easily avoid touching user space while holding the 2073 * console spinlock. It is allocated in con_init and is shared by 2074 * this code and the vc_screen read/write tty calls. 2075 * 2076 * We have to allocate this statically in the kernel data section 2077 * since console_init (and thus con_init) are called before any 2078 * kernel memory allocation is available. 2079 */ 2080 char con_buf[CON_BUF_SIZE]; 2081 DEFINE_MUTEX(con_buf_mtx); 2082 2083 /* is_double_width() is based on the wcwidth() implementation by 2084 * Markus Kuhn -- 2007-05-26 (Unicode 5.0) 2085 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c 2086 */ 2087 struct interval { 2088 uint32_t first; 2089 uint32_t last; 2090 }; 2091 2092 static int bisearch(uint32_t ucs, const struct interval *table, int max) 2093 { 2094 int min = 0; 2095 int mid; 2096 2097 if (ucs < table[0].first || ucs > table[max].last) 2098 return 0; 2099 while (max >= min) { 2100 mid = (min + max) / 2; 2101 if (ucs > table[mid].last) 2102 min = mid + 1; 2103 else if (ucs < table[mid].first) 2104 max = mid - 1; 2105 else 2106 return 1; 2107 } 2108 return 0; 2109 } 2110 2111 static int is_double_width(uint32_t ucs) 2112 { 2113 static const struct interval double_width[] = { 2114 { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E }, 2115 { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF }, 2116 { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 }, 2117 { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD } 2118 }; 2119 return bisearch(ucs, double_width, ARRAY_SIZE(double_width) - 1); 2120 } 2121 2122 /* acquires console_lock */ 2123 static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count) 2124 { 2125 #ifdef VT_BUF_VRAM_ONLY 2126 #define FLUSH do { } while(0); 2127 #else 2128 #define FLUSH if (draw_x >= 0) { \ 2129 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \ 2130 draw_x = -1; \ 2131 } 2132 #endif 2133 2134 int c, tc, ok, n = 0, draw_x = -1; 2135 unsigned int currcons; 2136 unsigned long draw_from = 0, draw_to = 0; 2137 struct vc_data *vc; 2138 unsigned char vc_attr; 2139 struct vt_notifier_param param; 2140 uint8_t rescan; 2141 uint8_t inverse; 2142 uint8_t width; 2143 u16 himask, charmask; 2144 2145 if (in_interrupt()) 2146 return count; 2147 2148 might_sleep(); 2149 2150 console_lock(); 2151 vc = tty->driver_data; 2152 if (vc == NULL) { 2153 printk(KERN_ERR "vt: argh, driver_data is NULL !\n"); 2154 console_unlock(); 2155 return 0; 2156 } 2157 2158 currcons = vc->vc_num; 2159 if (!vc_cons_allocated(currcons)) { 2160 /* could this happen? */ 2161 printk_once("con_write: tty %d not allocated\n", currcons+1); 2162 console_unlock(); 2163 return 0; 2164 } 2165 2166 himask = vc->vc_hi_font_mask; 2167 charmask = himask ? 0x1ff : 0xff; 2168 2169 /* undraw cursor first */ 2170 if (IS_FG(vc)) 2171 hide_cursor(vc); 2172 2173 param.vc = vc; 2174 2175 while (!tty->stopped && count) { 2176 int orig = *buf; 2177 c = orig; 2178 buf++; 2179 n++; 2180 count--; 2181 rescan = 0; 2182 inverse = 0; 2183 width = 1; 2184 2185 /* Do no translation at all in control states */ 2186 if (vc->vc_state != ESnormal) { 2187 tc = c; 2188 } else if (vc->vc_utf && !vc->vc_disp_ctrl) { 2189 /* Combine UTF-8 into Unicode in vc_utf_char. 2190 * vc_utf_count is the number of continuation bytes still 2191 * expected to arrive. 2192 * vc_npar is the number of continuation bytes arrived so 2193 * far 2194 */ 2195 rescan_last_byte: 2196 if ((c & 0xc0) == 0x80) { 2197 /* Continuation byte received */ 2198 static const uint32_t utf8_length_changes[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff }; 2199 if (vc->vc_utf_count) { 2200 vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f); 2201 vc->vc_npar++; 2202 if (--vc->vc_utf_count) { 2203 /* Still need some bytes */ 2204 continue; 2205 } 2206 /* Got a whole character */ 2207 c = vc->vc_utf_char; 2208 /* Reject overlong sequences */ 2209 if (c <= utf8_length_changes[vc->vc_npar - 1] || 2210 c > utf8_length_changes[vc->vc_npar]) 2211 c = 0xfffd; 2212 } else { 2213 /* Unexpected continuation byte */ 2214 vc->vc_utf_count = 0; 2215 c = 0xfffd; 2216 } 2217 } else { 2218 /* Single ASCII byte or first byte of a sequence received */ 2219 if (vc->vc_utf_count) { 2220 /* Continuation byte expected */ 2221 rescan = 1; 2222 vc->vc_utf_count = 0; 2223 c = 0xfffd; 2224 } else if (c > 0x7f) { 2225 /* First byte of a multibyte sequence received */ 2226 vc->vc_npar = 0; 2227 if ((c & 0xe0) == 0xc0) { 2228 vc->vc_utf_count = 1; 2229 vc->vc_utf_char = (c & 0x1f); 2230 } else if ((c & 0xf0) == 0xe0) { 2231 vc->vc_utf_count = 2; 2232 vc->vc_utf_char = (c & 0x0f); 2233 } else if ((c & 0xf8) == 0xf0) { 2234 vc->vc_utf_count = 3; 2235 vc->vc_utf_char = (c & 0x07); 2236 } else if ((c & 0xfc) == 0xf8) { 2237 vc->vc_utf_count = 4; 2238 vc->vc_utf_char = (c & 0x03); 2239 } else if ((c & 0xfe) == 0xfc) { 2240 vc->vc_utf_count = 5; 2241 vc->vc_utf_char = (c & 0x01); 2242 } else { 2243 /* 254 and 255 are invalid */ 2244 c = 0xfffd; 2245 } 2246 if (vc->vc_utf_count) { 2247 /* Still need some bytes */ 2248 continue; 2249 } 2250 } 2251 /* Nothing to do if an ASCII byte was received */ 2252 } 2253 /* End of UTF-8 decoding. */ 2254 /* c is the received character, or U+FFFD for invalid sequences. */ 2255 /* Replace invalid Unicode code points with U+FFFD too */ 2256 if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff) 2257 c = 0xfffd; 2258 tc = c; 2259 } else { /* no utf or alternate charset mode */ 2260 tc = vc_translate(vc, c); 2261 } 2262 2263 param.c = tc; 2264 if (atomic_notifier_call_chain(&vt_notifier_list, VT_PREWRITE, 2265 ¶m) == NOTIFY_STOP) 2266 continue; 2267 2268 /* If the original code was a control character we 2269 * only allow a glyph to be displayed if the code is 2270 * not normally used (such as for cursor movement) or 2271 * if the disp_ctrl mode has been explicitly enabled. 2272 * Certain characters (as given by the CTRL_ALWAYS 2273 * bitmap) are always displayed as control characters, 2274 * as the console would be pretty useless without 2275 * them; to display an arbitrary font position use the 2276 * direct-to-font zone in UTF-8 mode. 2277 */ 2278 ok = tc && (c >= 32 || 2279 !(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 : 2280 vc->vc_utf || ((CTRL_ACTION >> c) & 1))) 2281 && (c != 127 || vc->vc_disp_ctrl) 2282 && (c != 128+27); 2283 2284 if (vc->vc_state == ESnormal && ok) { 2285 if (vc->vc_utf && !vc->vc_disp_ctrl) { 2286 if (is_double_width(c)) 2287 width = 2; 2288 } 2289 /* Now try to find out how to display it */ 2290 tc = conv_uni_to_pc(vc, tc); 2291 if (tc & ~charmask) { 2292 if (tc == -1 || tc == -2) { 2293 continue; /* nothing to display */ 2294 } 2295 /* Glyph not found */ 2296 if ((!(vc->vc_utf && !vc->vc_disp_ctrl) || c < 128) && !(c & ~charmask)) { 2297 /* In legacy mode use the glyph we get by a 1:1 mapping. 2298 This would make absolutely no sense with Unicode in mind, 2299 but do this for ASCII characters since a font may lack 2300 Unicode mapping info and we don't want to end up with 2301 having question marks only. */ 2302 tc = c; 2303 } else { 2304 /* Display U+FFFD. If it's not found, display an inverse question mark. */ 2305 tc = conv_uni_to_pc(vc, 0xfffd); 2306 if (tc < 0) { 2307 inverse = 1; 2308 tc = conv_uni_to_pc(vc, '?'); 2309 if (tc < 0) tc = '?'; 2310 } 2311 } 2312 } 2313 2314 if (!inverse) { 2315 vc_attr = vc->vc_attr; 2316 } else { 2317 /* invert vc_attr */ 2318 if (!vc->vc_can_do_color) { 2319 vc_attr = (vc->vc_attr) ^ 0x08; 2320 } else if (vc->vc_hi_font_mask == 0x100) { 2321 vc_attr = ((vc->vc_attr) & 0x11) | (((vc->vc_attr) & 0xe0) >> 4) | (((vc->vc_attr) & 0x0e) << 4); 2322 } else { 2323 vc_attr = ((vc->vc_attr) & 0x88) | (((vc->vc_attr) & 0x70) >> 4) | (((vc->vc_attr) & 0x07) << 4); 2324 } 2325 FLUSH 2326 } 2327 2328 while (1) { 2329 if (vc->vc_need_wrap || vc->vc_decim) 2330 FLUSH 2331 if (vc->vc_need_wrap) { 2332 cr(vc); 2333 lf(vc); 2334 } 2335 if (vc->vc_decim) 2336 insert_char(vc, 1); 2337 scr_writew(himask ? 2338 ((vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) : 2339 (vc_attr << 8) + tc, 2340 (u16 *) vc->vc_pos); 2341 if (DO_UPDATE(vc) && draw_x < 0) { 2342 draw_x = vc->vc_x; 2343 draw_from = vc->vc_pos; 2344 } 2345 if (vc->vc_x == vc->vc_cols - 1) { 2346 vc->vc_need_wrap = vc->vc_decawm; 2347 draw_to = vc->vc_pos + 2; 2348 } else { 2349 vc->vc_x++; 2350 draw_to = (vc->vc_pos += 2); 2351 } 2352 2353 if (!--width) break; 2354 2355 tc = conv_uni_to_pc(vc, ' '); /* A space is printed in the second column */ 2356 if (tc < 0) tc = ' '; 2357 } 2358 notify_write(vc, c); 2359 2360 if (inverse) { 2361 FLUSH 2362 } 2363 2364 if (rescan) { 2365 rescan = 0; 2366 inverse = 0; 2367 width = 1; 2368 c = orig; 2369 goto rescan_last_byte; 2370 } 2371 continue; 2372 } 2373 FLUSH 2374 do_con_trol(tty, vc, orig); 2375 } 2376 FLUSH 2377 console_conditional_schedule(); 2378 console_unlock(); 2379 notify_update(vc); 2380 return n; 2381 #undef FLUSH 2382 } 2383 2384 /* 2385 * This is the console switching callback. 2386 * 2387 * Doing console switching in a process context allows 2388 * us to do the switches asynchronously (needed when we want 2389 * to switch due to a keyboard interrupt). Synchronization 2390 * with other console code and prevention of re-entrancy is 2391 * ensured with console_lock. 2392 */ 2393 static void console_callback(struct work_struct *ignored) 2394 { 2395 console_lock(); 2396 2397 if (want_console >= 0) { 2398 if (want_console != fg_console && 2399 vc_cons_allocated(want_console)) { 2400 hide_cursor(vc_cons[fg_console].d); 2401 change_console(vc_cons[want_console].d); 2402 /* we only changed when the console had already 2403 been allocated - a new console is not created 2404 in an interrupt routine */ 2405 } 2406 want_console = -1; 2407 } 2408 if (do_poke_blanked_console) { /* do not unblank for a LED change */ 2409 do_poke_blanked_console = 0; 2410 poke_blanked_console(); 2411 } 2412 if (scrollback_delta) { 2413 struct vc_data *vc = vc_cons[fg_console].d; 2414 clear_selection(); 2415 if (vc->vc_mode == KD_TEXT) 2416 vc->vc_sw->con_scrolldelta(vc, scrollback_delta); 2417 scrollback_delta = 0; 2418 } 2419 if (blank_timer_expired) { 2420 do_blank_screen(0); 2421 blank_timer_expired = 0; 2422 } 2423 notify_update(vc_cons[fg_console].d); 2424 2425 console_unlock(); 2426 } 2427 2428 int set_console(int nr) 2429 { 2430 struct vc_data *vc = vc_cons[fg_console].d; 2431 2432 if (!vc_cons_allocated(nr) || vt_dont_switch || 2433 (vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) { 2434 2435 /* 2436 * Console switch will fail in console_callback() or 2437 * change_console() so there is no point scheduling 2438 * the callback 2439 * 2440 * Existing set_console() users don't check the return 2441 * value so this shouldn't break anything 2442 */ 2443 return -EINVAL; 2444 } 2445 2446 want_console = nr; 2447 schedule_console_callback(); 2448 2449 return 0; 2450 } 2451 2452 struct tty_driver *console_driver; 2453 2454 #ifdef CONFIG_VT_CONSOLE 2455 2456 /** 2457 * vt_kmsg_redirect() - Sets/gets the kernel message console 2458 * @new: The new virtual terminal number or -1 if the console should stay 2459 * unchanged 2460 * 2461 * By default, the kernel messages are always printed on the current virtual 2462 * console. However, the user may modify that default with the 2463 * TIOCL_SETKMSGREDIRECT ioctl call. 2464 * 2465 * This function sets the kernel message console to be @new. It returns the old 2466 * virtual console number. The virtual terminal number 0 (both as parameter and 2467 * return value) means no redirection (i.e. always printed on the currently 2468 * active console). 2469 * 2470 * The parameter -1 means that only the current console is returned, but the 2471 * value is not modified. You may use the macro vt_get_kmsg_redirect() in that 2472 * case to make the code more understandable. 2473 * 2474 * When the kernel is compiled without CONFIG_VT_CONSOLE, this function ignores 2475 * the parameter and always returns 0. 2476 */ 2477 int vt_kmsg_redirect(int new) 2478 { 2479 static int kmsg_con; 2480 2481 if (new != -1) 2482 return xchg(&kmsg_con, new); 2483 else 2484 return kmsg_con; 2485 } 2486 2487 /* 2488 * Console on virtual terminal 2489 * 2490 * The console must be locked when we get here. 2491 */ 2492 2493 static void vt_console_print(struct console *co, const char *b, unsigned count) 2494 { 2495 struct vc_data *vc = vc_cons[fg_console].d; 2496 unsigned char c; 2497 static DEFINE_SPINLOCK(printing_lock); 2498 const ushort *start; 2499 ushort cnt = 0; 2500 ushort myx; 2501 int kmsg_console; 2502 2503 /* console busy or not yet initialized */ 2504 if (!printable) 2505 return; 2506 if (!spin_trylock(&printing_lock)) 2507 return; 2508 2509 kmsg_console = vt_get_kmsg_redirect(); 2510 if (kmsg_console && vc_cons_allocated(kmsg_console - 1)) 2511 vc = vc_cons[kmsg_console - 1].d; 2512 2513 /* read `x' only after setting currcons properly (otherwise 2514 the `x' macro will read the x of the foreground console). */ 2515 myx = vc->vc_x; 2516 2517 if (!vc_cons_allocated(fg_console)) { 2518 /* impossible */ 2519 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */ 2520 goto quit; 2521 } 2522 2523 if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc)) 2524 goto quit; 2525 2526 /* undraw cursor first */ 2527 if (IS_FG(vc)) 2528 hide_cursor(vc); 2529 2530 start = (ushort *)vc->vc_pos; 2531 2532 /* Contrived structure to try to emulate original need_wrap behaviour 2533 * Problems caused when we have need_wrap set on '\n' character */ 2534 while (count--) { 2535 c = *b++; 2536 if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) { 2537 if (cnt > 0) { 2538 if (CON_IS_VISIBLE(vc)) 2539 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x); 2540 vc->vc_x += cnt; 2541 if (vc->vc_need_wrap) 2542 vc->vc_x--; 2543 cnt = 0; 2544 } 2545 if (c == 8) { /* backspace */ 2546 bs(vc); 2547 start = (ushort *)vc->vc_pos; 2548 myx = vc->vc_x; 2549 continue; 2550 } 2551 if (c != 13) 2552 lf(vc); 2553 cr(vc); 2554 start = (ushort *)vc->vc_pos; 2555 myx = vc->vc_x; 2556 if (c == 10 || c == 13) 2557 continue; 2558 } 2559 scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos); 2560 notify_write(vc, c); 2561 cnt++; 2562 if (myx == vc->vc_cols - 1) { 2563 vc->vc_need_wrap = 1; 2564 continue; 2565 } 2566 vc->vc_pos += 2; 2567 myx++; 2568 } 2569 if (cnt > 0) { 2570 if (CON_IS_VISIBLE(vc)) 2571 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x); 2572 vc->vc_x += cnt; 2573 if (vc->vc_x == vc->vc_cols) { 2574 vc->vc_x--; 2575 vc->vc_need_wrap = 1; 2576 } 2577 } 2578 set_cursor(vc); 2579 notify_update(vc); 2580 2581 quit: 2582 spin_unlock(&printing_lock); 2583 } 2584 2585 static struct tty_driver *vt_console_device(struct console *c, int *index) 2586 { 2587 *index = c->index ? c->index-1 : fg_console; 2588 return console_driver; 2589 } 2590 2591 static struct console vt_console_driver = { 2592 .name = "tty", 2593 .write = vt_console_print, 2594 .device = vt_console_device, 2595 .unblank = unblank_screen, 2596 .flags = CON_PRINTBUFFER, 2597 .index = -1, 2598 }; 2599 #endif 2600 2601 /* 2602 * Handling of Linux-specific VC ioctls 2603 */ 2604 2605 /* 2606 * Generally a bit racy with respect to console_lock();. 2607 * 2608 * There are some functions which don't need it. 2609 * 2610 * There are some functions which can sleep for arbitrary periods 2611 * (paste_selection) but we don't need the lock there anyway. 2612 * 2613 * set_selection has locking, and definitely needs it 2614 */ 2615 2616 int tioclinux(struct tty_struct *tty, unsigned long arg) 2617 { 2618 char type, data; 2619 char __user *p = (char __user *)arg; 2620 int lines; 2621 int ret; 2622 2623 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN)) 2624 return -EPERM; 2625 if (get_user(type, p)) 2626 return -EFAULT; 2627 ret = 0; 2628 2629 switch (type) 2630 { 2631 case TIOCL_SETSEL: 2632 console_lock(); 2633 ret = set_selection((struct tiocl_selection __user *)(p+1), tty); 2634 console_unlock(); 2635 break; 2636 case TIOCL_PASTESEL: 2637 ret = paste_selection(tty); 2638 break; 2639 case TIOCL_UNBLANKSCREEN: 2640 console_lock(); 2641 unblank_screen(); 2642 console_unlock(); 2643 break; 2644 case TIOCL_SELLOADLUT: 2645 ret = sel_loadlut(p); 2646 break; 2647 case TIOCL_GETSHIFTSTATE: 2648 2649 /* 2650 * Make it possible to react to Shift+Mousebutton. 2651 * Note that 'shift_state' is an undocumented 2652 * kernel-internal variable; programs not closely 2653 * related to the kernel should not use this. 2654 */ 2655 data = shift_state; 2656 ret = __put_user(data, p); 2657 break; 2658 case TIOCL_GETMOUSEREPORTING: 2659 data = mouse_reporting(); 2660 ret = __put_user(data, p); 2661 break; 2662 case TIOCL_SETVESABLANK: 2663 ret = set_vesa_blanking(p); 2664 break; 2665 case TIOCL_GETKMSGREDIRECT: 2666 data = vt_get_kmsg_redirect(); 2667 ret = __put_user(data, p); 2668 break; 2669 case TIOCL_SETKMSGREDIRECT: 2670 if (!capable(CAP_SYS_ADMIN)) { 2671 ret = -EPERM; 2672 } else { 2673 if (get_user(data, p+1)) 2674 ret = -EFAULT; 2675 else 2676 vt_kmsg_redirect(data); 2677 } 2678 break; 2679 case TIOCL_GETFGCONSOLE: 2680 ret = fg_console; 2681 break; 2682 case TIOCL_SCROLLCONSOLE: 2683 if (get_user(lines, (s32 __user *)(p+4))) { 2684 ret = -EFAULT; 2685 } else { 2686 scrollfront(vc_cons[fg_console].d, lines); 2687 ret = 0; 2688 } 2689 break; 2690 case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */ 2691 console_lock(); 2692 ignore_poke = 1; 2693 do_blank_screen(0); 2694 console_unlock(); 2695 break; 2696 case TIOCL_BLANKEDSCREEN: 2697 ret = console_blanked; 2698 break; 2699 default: 2700 ret = -EINVAL; 2701 break; 2702 } 2703 return ret; 2704 } 2705 2706 /* 2707 * /dev/ttyN handling 2708 */ 2709 2710 static int con_write(struct tty_struct *tty, const unsigned char *buf, int count) 2711 { 2712 int retval; 2713 2714 retval = do_con_write(tty, buf, count); 2715 con_flush_chars(tty); 2716 2717 return retval; 2718 } 2719 2720 static int con_put_char(struct tty_struct *tty, unsigned char ch) 2721 { 2722 if (in_interrupt()) 2723 return 0; /* n_r3964 calls put_char() from interrupt context */ 2724 return do_con_write(tty, &ch, 1); 2725 } 2726 2727 static int con_write_room(struct tty_struct *tty) 2728 { 2729 if (tty->stopped) 2730 return 0; 2731 return 32768; /* No limit, really; we're not buffering */ 2732 } 2733 2734 static int con_chars_in_buffer(struct tty_struct *tty) 2735 { 2736 return 0; /* we're not buffering */ 2737 } 2738 2739 /* 2740 * con_throttle and con_unthrottle are only used for 2741 * paste_selection(), which has to stuff in a large number of 2742 * characters... 2743 */ 2744 static void con_throttle(struct tty_struct *tty) 2745 { 2746 } 2747 2748 static void con_unthrottle(struct tty_struct *tty) 2749 { 2750 struct vc_data *vc = tty->driver_data; 2751 2752 wake_up_interruptible(&vc->paste_wait); 2753 } 2754 2755 /* 2756 * Turn the Scroll-Lock LED on when the tty is stopped 2757 */ 2758 static void con_stop(struct tty_struct *tty) 2759 { 2760 int console_num; 2761 if (!tty) 2762 return; 2763 console_num = tty->index; 2764 if (!vc_cons_allocated(console_num)) 2765 return; 2766 set_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK); 2767 set_leds(); 2768 } 2769 2770 /* 2771 * Turn the Scroll-Lock LED off when the console is started 2772 */ 2773 static void con_start(struct tty_struct *tty) 2774 { 2775 int console_num; 2776 if (!tty) 2777 return; 2778 console_num = tty->index; 2779 if (!vc_cons_allocated(console_num)) 2780 return; 2781 clr_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK); 2782 set_leds(); 2783 } 2784 2785 static void con_flush_chars(struct tty_struct *tty) 2786 { 2787 struct vc_data *vc; 2788 2789 if (in_interrupt()) /* from flush_to_ldisc */ 2790 return; 2791 2792 /* if we race with con_close(), vt may be null */ 2793 console_lock(); 2794 vc = tty->driver_data; 2795 if (vc) 2796 set_cursor(vc); 2797 console_unlock(); 2798 } 2799 2800 /* 2801 * Allocate the console screen memory. 2802 */ 2803 static int con_open(struct tty_struct *tty, struct file *filp) 2804 { 2805 unsigned int currcons = tty->index; 2806 int ret = 0; 2807 2808 console_lock(); 2809 if (tty->driver_data == NULL) { 2810 ret = vc_allocate(currcons); 2811 if (ret == 0) { 2812 struct vc_data *vc = vc_cons[currcons].d; 2813 2814 /* Still being freed */ 2815 if (vc->port.tty) { 2816 console_unlock(); 2817 return -ERESTARTSYS; 2818 } 2819 tty->driver_data = vc; 2820 vc->port.tty = tty; 2821 2822 if (!tty->winsize.ws_row && !tty->winsize.ws_col) { 2823 tty->winsize.ws_row = vc_cons[currcons].d->vc_rows; 2824 tty->winsize.ws_col = vc_cons[currcons].d->vc_cols; 2825 } 2826 if (vc->vc_utf) 2827 tty->termios->c_iflag |= IUTF8; 2828 else 2829 tty->termios->c_iflag &= ~IUTF8; 2830 console_unlock(); 2831 return ret; 2832 } 2833 } 2834 console_unlock(); 2835 return ret; 2836 } 2837 2838 static void con_close(struct tty_struct *tty, struct file *filp) 2839 { 2840 /* Nothing to do - we defer to shutdown */ 2841 } 2842 2843 static void con_shutdown(struct tty_struct *tty) 2844 { 2845 struct vc_data *vc = tty->driver_data; 2846 BUG_ON(vc == NULL); 2847 console_lock(); 2848 vc->port.tty = NULL; 2849 console_unlock(); 2850 tty_shutdown(tty); 2851 } 2852 2853 static int default_italic_color = 2; // green (ASCII) 2854 static int default_underline_color = 3; // cyan (ASCII) 2855 module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR); 2856 module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR); 2857 2858 static void vc_init(struct vc_data *vc, unsigned int rows, 2859 unsigned int cols, int do_clear) 2860 { 2861 int j, k ; 2862 2863 vc->vc_cols = cols; 2864 vc->vc_rows = rows; 2865 vc->vc_size_row = cols << 1; 2866 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row; 2867 2868 set_origin(vc); 2869 vc->vc_pos = vc->vc_origin; 2870 reset_vc(vc); 2871 for (j=k=0; j<16; j++) { 2872 vc->vc_palette[k++] = default_red[j] ; 2873 vc->vc_palette[k++] = default_grn[j] ; 2874 vc->vc_palette[k++] = default_blu[j] ; 2875 } 2876 vc->vc_def_color = 0x07; /* white */ 2877 vc->vc_ulcolor = default_underline_color; 2878 vc->vc_itcolor = default_italic_color; 2879 vc->vc_halfcolor = 0x08; /* grey */ 2880 init_waitqueue_head(&vc->paste_wait); 2881 reset_terminal(vc, do_clear); 2882 } 2883 2884 /* 2885 * This routine initializes console interrupts, and does nothing 2886 * else. If you want the screen to clear, call tty_write with 2887 * the appropriate escape-sequence. 2888 */ 2889 2890 static int __init con_init(void) 2891 { 2892 const char *display_desc = NULL; 2893 struct vc_data *vc; 2894 unsigned int currcons = 0, i; 2895 2896 console_lock(); 2897 2898 if (conswitchp) 2899 display_desc = conswitchp->con_startup(); 2900 if (!display_desc) { 2901 fg_console = 0; 2902 console_unlock(); 2903 return 0; 2904 } 2905 2906 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 2907 struct con_driver *con_driver = ®istered_con_driver[i]; 2908 2909 if (con_driver->con == NULL) { 2910 con_driver->con = conswitchp; 2911 con_driver->desc = display_desc; 2912 con_driver->flag = CON_DRIVER_FLAG_INIT; 2913 con_driver->first = 0; 2914 con_driver->last = MAX_NR_CONSOLES - 1; 2915 break; 2916 } 2917 } 2918 2919 for (i = 0; i < MAX_NR_CONSOLES; i++) 2920 con_driver_map[i] = conswitchp; 2921 2922 if (blankinterval) { 2923 blank_state = blank_normal_wait; 2924 mod_timer(&console_timer, jiffies + (blankinterval * HZ)); 2925 } 2926 2927 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) { 2928 vc_cons[currcons].d = vc = kzalloc(sizeof(struct vc_data), GFP_NOWAIT); 2929 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK); 2930 tty_port_init(&vc->port); 2931 visual_init(vc, currcons, 1); 2932 vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_NOWAIT); 2933 vc_init(vc, vc->vc_rows, vc->vc_cols, 2934 currcons || !vc->vc_sw->con_save_screen); 2935 } 2936 currcons = fg_console = 0; 2937 master_display_fg = vc = vc_cons[currcons].d; 2938 set_origin(vc); 2939 save_screen(vc); 2940 gotoxy(vc, vc->vc_x, vc->vc_y); 2941 csi_J(vc, 0); 2942 update_screen(vc); 2943 printk("Console: %s %s %dx%d", 2944 vc->vc_can_do_color ? "colour" : "mono", 2945 display_desc, vc->vc_cols, vc->vc_rows); 2946 printable = 1; 2947 printk("\n"); 2948 2949 console_unlock(); 2950 2951 #ifdef CONFIG_VT_CONSOLE 2952 register_console(&vt_console_driver); 2953 #endif 2954 return 0; 2955 } 2956 console_initcall(con_init); 2957 2958 static const struct tty_operations con_ops = { 2959 .open = con_open, 2960 .close = con_close, 2961 .write = con_write, 2962 .write_room = con_write_room, 2963 .put_char = con_put_char, 2964 .flush_chars = con_flush_chars, 2965 .chars_in_buffer = con_chars_in_buffer, 2966 .ioctl = vt_ioctl, 2967 #ifdef CONFIG_COMPAT 2968 .compat_ioctl = vt_compat_ioctl, 2969 #endif 2970 .stop = con_stop, 2971 .start = con_start, 2972 .throttle = con_throttle, 2973 .unthrottle = con_unthrottle, 2974 .resize = vt_resize, 2975 .shutdown = con_shutdown 2976 }; 2977 2978 static struct cdev vc0_cdev; 2979 2980 static ssize_t show_tty_active(struct device *dev, 2981 struct device_attribute *attr, char *buf) 2982 { 2983 return sprintf(buf, "tty%d\n", fg_console + 1); 2984 } 2985 static DEVICE_ATTR(active, S_IRUGO, show_tty_active, NULL); 2986 2987 int __init vty_init(const struct file_operations *console_fops) 2988 { 2989 cdev_init(&vc0_cdev, console_fops); 2990 if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) || 2991 register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0) 2992 panic("Couldn't register /dev/tty0 driver\n"); 2993 tty0dev = device_create(tty_class, NULL, MKDEV(TTY_MAJOR, 0), NULL, "tty0"); 2994 if (IS_ERR(tty0dev)) 2995 tty0dev = NULL; 2996 else 2997 WARN_ON(device_create_file(tty0dev, &dev_attr_active) < 0); 2998 2999 vcs_init(); 3000 3001 console_driver = alloc_tty_driver(MAX_NR_CONSOLES); 3002 if (!console_driver) 3003 panic("Couldn't allocate console driver\n"); 3004 console_driver->owner = THIS_MODULE; 3005 console_driver->name = "tty"; 3006 console_driver->name_base = 1; 3007 console_driver->major = TTY_MAJOR; 3008 console_driver->minor_start = 1; 3009 console_driver->type = TTY_DRIVER_TYPE_CONSOLE; 3010 console_driver->init_termios = tty_std_termios; 3011 if (default_utf8) 3012 console_driver->init_termios.c_iflag |= IUTF8; 3013 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS; 3014 tty_set_operations(console_driver, &con_ops); 3015 if (tty_register_driver(console_driver)) 3016 panic("Couldn't register console driver\n"); 3017 kbd_init(); 3018 console_map_init(); 3019 #ifdef CONFIG_MDA_CONSOLE 3020 mda_console_init(); 3021 #endif 3022 return 0; 3023 } 3024 3025 #ifndef VT_SINGLE_DRIVER 3026 3027 static struct class *vtconsole_class; 3028 3029 static int bind_con_driver(const struct consw *csw, int first, int last, 3030 int deflt) 3031 { 3032 struct module *owner = csw->owner; 3033 const char *desc = NULL; 3034 struct con_driver *con_driver; 3035 int i, j = -1, k = -1, retval = -ENODEV; 3036 3037 if (!try_module_get(owner)) 3038 return -ENODEV; 3039 3040 console_lock(); 3041 3042 /* check if driver is registered */ 3043 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3044 con_driver = ®istered_con_driver[i]; 3045 3046 if (con_driver->con == csw) { 3047 desc = con_driver->desc; 3048 retval = 0; 3049 break; 3050 } 3051 } 3052 3053 if (retval) 3054 goto err; 3055 3056 if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) { 3057 csw->con_startup(); 3058 con_driver->flag |= CON_DRIVER_FLAG_INIT; 3059 } 3060 3061 if (deflt) { 3062 if (conswitchp) 3063 module_put(conswitchp->owner); 3064 3065 __module_get(owner); 3066 conswitchp = csw; 3067 } 3068 3069 first = max(first, con_driver->first); 3070 last = min(last, con_driver->last); 3071 3072 for (i = first; i <= last; i++) { 3073 int old_was_color; 3074 struct vc_data *vc = vc_cons[i].d; 3075 3076 if (con_driver_map[i]) 3077 module_put(con_driver_map[i]->owner); 3078 __module_get(owner); 3079 con_driver_map[i] = csw; 3080 3081 if (!vc || !vc->vc_sw) 3082 continue; 3083 3084 j = i; 3085 3086 if (CON_IS_VISIBLE(vc)) { 3087 k = i; 3088 save_screen(vc); 3089 } 3090 3091 old_was_color = vc->vc_can_do_color; 3092 vc->vc_sw->con_deinit(vc); 3093 vc->vc_origin = (unsigned long)vc->vc_screenbuf; 3094 visual_init(vc, i, 0); 3095 set_origin(vc); 3096 update_attr(vc); 3097 3098 /* If the console changed between mono <-> color, then 3099 * the attributes in the screenbuf will be wrong. The 3100 * following resets all attributes to something sane. 3101 */ 3102 if (old_was_color != vc->vc_can_do_color) 3103 clear_buffer_attributes(vc); 3104 } 3105 3106 printk("Console: switching "); 3107 if (!deflt) 3108 printk("consoles %d-%d ", first+1, last+1); 3109 if (j >= 0) { 3110 struct vc_data *vc = vc_cons[j].d; 3111 3112 printk("to %s %s %dx%d\n", 3113 vc->vc_can_do_color ? "colour" : "mono", 3114 desc, vc->vc_cols, vc->vc_rows); 3115 3116 if (k >= 0) { 3117 vc = vc_cons[k].d; 3118 update_screen(vc); 3119 } 3120 } else 3121 printk("to %s\n", desc); 3122 3123 retval = 0; 3124 err: 3125 console_unlock(); 3126 module_put(owner); 3127 return retval; 3128 }; 3129 3130 #ifdef CONFIG_VT_HW_CONSOLE_BINDING 3131 static int con_is_graphics(const struct consw *csw, int first, int last) 3132 { 3133 int i, retval = 0; 3134 3135 for (i = first; i <= last; i++) { 3136 struct vc_data *vc = vc_cons[i].d; 3137 3138 if (vc && vc->vc_mode == KD_GRAPHICS) { 3139 retval = 1; 3140 break; 3141 } 3142 } 3143 3144 return retval; 3145 } 3146 3147 /** 3148 * unbind_con_driver - unbind a console driver 3149 * @csw: pointer to console driver to unregister 3150 * @first: first in range of consoles that @csw should be unbound from 3151 * @last: last in range of consoles that @csw should be unbound from 3152 * @deflt: should next bound console driver be default after @csw is unbound? 3153 * 3154 * To unbind a driver from all possible consoles, pass 0 as @first and 3155 * %MAX_NR_CONSOLES as @last. 3156 * 3157 * @deflt controls whether the console that ends up replacing @csw should be 3158 * the default console. 3159 * 3160 * RETURNS: 3161 * -ENODEV if @csw isn't a registered console driver or can't be unregistered 3162 * or 0 on success. 3163 */ 3164 int unbind_con_driver(const struct consw *csw, int first, int last, int deflt) 3165 { 3166 struct module *owner = csw->owner; 3167 const struct consw *defcsw = NULL; 3168 struct con_driver *con_driver = NULL, *con_back = NULL; 3169 int i, retval = -ENODEV; 3170 3171 if (!try_module_get(owner)) 3172 return -ENODEV; 3173 3174 console_lock(); 3175 3176 /* check if driver is registered and if it is unbindable */ 3177 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3178 con_driver = ®istered_con_driver[i]; 3179 3180 if (con_driver->con == csw && 3181 con_driver->flag & CON_DRIVER_FLAG_MODULE) { 3182 retval = 0; 3183 break; 3184 } 3185 } 3186 3187 if (retval) { 3188 console_unlock(); 3189 goto err; 3190 } 3191 3192 retval = -ENODEV; 3193 3194 /* check if backup driver exists */ 3195 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3196 con_back = ®istered_con_driver[i]; 3197 3198 if (con_back->con && 3199 !(con_back->flag & CON_DRIVER_FLAG_MODULE)) { 3200 defcsw = con_back->con; 3201 retval = 0; 3202 break; 3203 } 3204 } 3205 3206 if (retval) { 3207 console_unlock(); 3208 goto err; 3209 } 3210 3211 if (!con_is_bound(csw)) { 3212 console_unlock(); 3213 goto err; 3214 } 3215 3216 first = max(first, con_driver->first); 3217 last = min(last, con_driver->last); 3218 3219 for (i = first; i <= last; i++) { 3220 if (con_driver_map[i] == csw) { 3221 module_put(csw->owner); 3222 con_driver_map[i] = NULL; 3223 } 3224 } 3225 3226 if (!con_is_bound(defcsw)) { 3227 const struct consw *defconsw = conswitchp; 3228 3229 defcsw->con_startup(); 3230 con_back->flag |= CON_DRIVER_FLAG_INIT; 3231 /* 3232 * vgacon may change the default driver to point 3233 * to dummycon, we restore it here... 3234 */ 3235 conswitchp = defconsw; 3236 } 3237 3238 if (!con_is_bound(csw)) 3239 con_driver->flag &= ~CON_DRIVER_FLAG_INIT; 3240 3241 console_unlock(); 3242 /* ignore return value, binding should not fail */ 3243 bind_con_driver(defcsw, first, last, deflt); 3244 err: 3245 module_put(owner); 3246 return retval; 3247 3248 } 3249 EXPORT_SYMBOL(unbind_con_driver); 3250 3251 static int vt_bind(struct con_driver *con) 3252 { 3253 const struct consw *defcsw = NULL, *csw = NULL; 3254 int i, more = 1, first = -1, last = -1, deflt = 0; 3255 3256 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) || 3257 con_is_graphics(con->con, con->first, con->last)) 3258 goto err; 3259 3260 csw = con->con; 3261 3262 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3263 struct con_driver *con = ®istered_con_driver[i]; 3264 3265 if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) { 3266 defcsw = con->con; 3267 break; 3268 } 3269 } 3270 3271 if (!defcsw) 3272 goto err; 3273 3274 while (more) { 3275 more = 0; 3276 3277 for (i = con->first; i <= con->last; i++) { 3278 if (con_driver_map[i] == defcsw) { 3279 if (first == -1) 3280 first = i; 3281 last = i; 3282 more = 1; 3283 } else if (first != -1) 3284 break; 3285 } 3286 3287 if (first == 0 && last == MAX_NR_CONSOLES -1) 3288 deflt = 1; 3289 3290 if (first != -1) 3291 bind_con_driver(csw, first, last, deflt); 3292 3293 first = -1; 3294 last = -1; 3295 deflt = 0; 3296 } 3297 3298 err: 3299 return 0; 3300 } 3301 3302 static int vt_unbind(struct con_driver *con) 3303 { 3304 const struct consw *csw = NULL; 3305 int i, more = 1, first = -1, last = -1, deflt = 0; 3306 3307 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) || 3308 con_is_graphics(con->con, con->first, con->last)) 3309 goto err; 3310 3311 csw = con->con; 3312 3313 while (more) { 3314 more = 0; 3315 3316 for (i = con->first; i <= con->last; i++) { 3317 if (con_driver_map[i] == csw) { 3318 if (first == -1) 3319 first = i; 3320 last = i; 3321 more = 1; 3322 } else if (first != -1) 3323 break; 3324 } 3325 3326 if (first == 0 && last == MAX_NR_CONSOLES -1) 3327 deflt = 1; 3328 3329 if (first != -1) 3330 unbind_con_driver(csw, first, last, deflt); 3331 3332 first = -1; 3333 last = -1; 3334 deflt = 0; 3335 } 3336 3337 err: 3338 return 0; 3339 } 3340 #else 3341 static inline int vt_bind(struct con_driver *con) 3342 { 3343 return 0; 3344 } 3345 static inline int vt_unbind(struct con_driver *con) 3346 { 3347 return 0; 3348 } 3349 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */ 3350 3351 static ssize_t store_bind(struct device *dev, struct device_attribute *attr, 3352 const char *buf, size_t count) 3353 { 3354 struct con_driver *con = dev_get_drvdata(dev); 3355 int bind = simple_strtoul(buf, NULL, 0); 3356 3357 if (bind) 3358 vt_bind(con); 3359 else 3360 vt_unbind(con); 3361 3362 return count; 3363 } 3364 3365 static ssize_t show_bind(struct device *dev, struct device_attribute *attr, 3366 char *buf) 3367 { 3368 struct con_driver *con = dev_get_drvdata(dev); 3369 int bind = con_is_bound(con->con); 3370 3371 return snprintf(buf, PAGE_SIZE, "%i\n", bind); 3372 } 3373 3374 static ssize_t show_name(struct device *dev, struct device_attribute *attr, 3375 char *buf) 3376 { 3377 struct con_driver *con = dev_get_drvdata(dev); 3378 3379 return snprintf(buf, PAGE_SIZE, "%s %s\n", 3380 (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)", 3381 con->desc); 3382 3383 } 3384 3385 static struct device_attribute device_attrs[] = { 3386 __ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind), 3387 __ATTR(name, S_IRUGO, show_name, NULL), 3388 }; 3389 3390 static int vtconsole_init_device(struct con_driver *con) 3391 { 3392 int i; 3393 int error = 0; 3394 3395 con->flag |= CON_DRIVER_FLAG_ATTR; 3396 dev_set_drvdata(con->dev, con); 3397 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) { 3398 error = device_create_file(con->dev, &device_attrs[i]); 3399 if (error) 3400 break; 3401 } 3402 3403 if (error) { 3404 while (--i >= 0) 3405 device_remove_file(con->dev, &device_attrs[i]); 3406 con->flag &= ~CON_DRIVER_FLAG_ATTR; 3407 } 3408 3409 return error; 3410 } 3411 3412 static void vtconsole_deinit_device(struct con_driver *con) 3413 { 3414 int i; 3415 3416 if (con->flag & CON_DRIVER_FLAG_ATTR) { 3417 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) 3418 device_remove_file(con->dev, &device_attrs[i]); 3419 con->flag &= ~CON_DRIVER_FLAG_ATTR; 3420 } 3421 } 3422 3423 /** 3424 * con_is_bound - checks if driver is bound to the console 3425 * @csw: console driver 3426 * 3427 * RETURNS: zero if unbound, nonzero if bound 3428 * 3429 * Drivers can call this and if zero, they should release 3430 * all resources allocated on con_startup() 3431 */ 3432 int con_is_bound(const struct consw *csw) 3433 { 3434 int i, bound = 0; 3435 3436 for (i = 0; i < MAX_NR_CONSOLES; i++) { 3437 if (con_driver_map[i] == csw) { 3438 bound = 1; 3439 break; 3440 } 3441 } 3442 3443 return bound; 3444 } 3445 EXPORT_SYMBOL(con_is_bound); 3446 3447 /** 3448 * con_debug_enter - prepare the console for the kernel debugger 3449 * @sw: console driver 3450 * 3451 * Called when the console is taken over by the kernel debugger, this 3452 * function needs to save the current console state, then put the console 3453 * into a state suitable for the kernel debugger. 3454 * 3455 * RETURNS: 3456 * Zero on success, nonzero if a failure occurred when trying to prepare 3457 * the console for the debugger. 3458 */ 3459 int con_debug_enter(struct vc_data *vc) 3460 { 3461 int ret = 0; 3462 3463 saved_fg_console = fg_console; 3464 saved_last_console = last_console; 3465 saved_want_console = want_console; 3466 saved_vc_mode = vc->vc_mode; 3467 saved_console_blanked = console_blanked; 3468 vc->vc_mode = KD_TEXT; 3469 console_blanked = 0; 3470 if (vc->vc_sw->con_debug_enter) 3471 ret = vc->vc_sw->con_debug_enter(vc); 3472 #ifdef CONFIG_KGDB_KDB 3473 /* Set the initial LINES variable if it is not already set */ 3474 if (vc->vc_rows < 999) { 3475 int linecount; 3476 char lns[4]; 3477 const char *setargs[3] = { 3478 "set", 3479 "LINES", 3480 lns, 3481 }; 3482 if (kdbgetintenv(setargs[0], &linecount)) { 3483 snprintf(lns, 4, "%i", vc->vc_rows); 3484 kdb_set(2, setargs); 3485 } 3486 } 3487 #endif /* CONFIG_KGDB_KDB */ 3488 return ret; 3489 } 3490 EXPORT_SYMBOL_GPL(con_debug_enter); 3491 3492 /** 3493 * con_debug_leave - restore console state 3494 * @sw: console driver 3495 * 3496 * Restore the console state to what it was before the kernel debugger 3497 * was invoked. 3498 * 3499 * RETURNS: 3500 * Zero on success, nonzero if a failure occurred when trying to restore 3501 * the console. 3502 */ 3503 int con_debug_leave(void) 3504 { 3505 struct vc_data *vc; 3506 int ret = 0; 3507 3508 fg_console = saved_fg_console; 3509 last_console = saved_last_console; 3510 want_console = saved_want_console; 3511 console_blanked = saved_console_blanked; 3512 vc_cons[fg_console].d->vc_mode = saved_vc_mode; 3513 3514 vc = vc_cons[fg_console].d; 3515 if (vc->vc_sw->con_debug_leave) 3516 ret = vc->vc_sw->con_debug_leave(vc); 3517 return ret; 3518 } 3519 EXPORT_SYMBOL_GPL(con_debug_leave); 3520 3521 /** 3522 * register_con_driver - register console driver to console layer 3523 * @csw: console driver 3524 * @first: the first console to take over, minimum value is 0 3525 * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1 3526 * 3527 * DESCRIPTION: This function registers a console driver which can later 3528 * bind to a range of consoles specified by @first and @last. It will 3529 * also initialize the console driver by calling con_startup(). 3530 */ 3531 int register_con_driver(const struct consw *csw, int first, int last) 3532 { 3533 struct module *owner = csw->owner; 3534 struct con_driver *con_driver; 3535 const char *desc; 3536 int i, retval = 0; 3537 3538 if (!try_module_get(owner)) 3539 return -ENODEV; 3540 3541 console_lock(); 3542 3543 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3544 con_driver = ®istered_con_driver[i]; 3545 3546 /* already registered */ 3547 if (con_driver->con == csw) 3548 retval = -EBUSY; 3549 } 3550 3551 if (retval) 3552 goto err; 3553 3554 desc = csw->con_startup(); 3555 3556 if (!desc) 3557 goto err; 3558 3559 retval = -EINVAL; 3560 3561 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3562 con_driver = ®istered_con_driver[i]; 3563 3564 if (con_driver->con == NULL) { 3565 con_driver->con = csw; 3566 con_driver->desc = desc; 3567 con_driver->node = i; 3568 con_driver->flag = CON_DRIVER_FLAG_MODULE | 3569 CON_DRIVER_FLAG_INIT; 3570 con_driver->first = first; 3571 con_driver->last = last; 3572 retval = 0; 3573 break; 3574 } 3575 } 3576 3577 if (retval) 3578 goto err; 3579 3580 con_driver->dev = device_create(vtconsole_class, NULL, 3581 MKDEV(0, con_driver->node), 3582 NULL, "vtcon%i", 3583 con_driver->node); 3584 3585 if (IS_ERR(con_driver->dev)) { 3586 printk(KERN_WARNING "Unable to create device for %s; " 3587 "errno = %ld\n", con_driver->desc, 3588 PTR_ERR(con_driver->dev)); 3589 con_driver->dev = NULL; 3590 } else { 3591 vtconsole_init_device(con_driver); 3592 } 3593 3594 err: 3595 console_unlock(); 3596 module_put(owner); 3597 return retval; 3598 } 3599 EXPORT_SYMBOL(register_con_driver); 3600 3601 /** 3602 * unregister_con_driver - unregister console driver from console layer 3603 * @csw: console driver 3604 * 3605 * DESCRIPTION: All drivers that registers to the console layer must 3606 * call this function upon exit, or if the console driver is in a state 3607 * where it won't be able to handle console services, such as the 3608 * framebuffer console without loaded framebuffer drivers. 3609 * 3610 * The driver must unbind first prior to unregistration. 3611 */ 3612 int unregister_con_driver(const struct consw *csw) 3613 { 3614 int i, retval = -ENODEV; 3615 3616 console_lock(); 3617 3618 /* cannot unregister a bound driver */ 3619 if (con_is_bound(csw)) 3620 goto err; 3621 3622 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3623 struct con_driver *con_driver = ®istered_con_driver[i]; 3624 3625 if (con_driver->con == csw && 3626 con_driver->flag & CON_DRIVER_FLAG_MODULE) { 3627 vtconsole_deinit_device(con_driver); 3628 device_destroy(vtconsole_class, 3629 MKDEV(0, con_driver->node)); 3630 con_driver->con = NULL; 3631 con_driver->desc = NULL; 3632 con_driver->dev = NULL; 3633 con_driver->node = 0; 3634 con_driver->flag = 0; 3635 con_driver->first = 0; 3636 con_driver->last = 0; 3637 retval = 0; 3638 break; 3639 } 3640 } 3641 err: 3642 console_unlock(); 3643 return retval; 3644 } 3645 EXPORT_SYMBOL(unregister_con_driver); 3646 3647 /* 3648 * If we support more console drivers, this function is used 3649 * when a driver wants to take over some existing consoles 3650 * and become default driver for newly opened ones. 3651 * 3652 * take_over_console is basically a register followed by unbind 3653 */ 3654 int take_over_console(const struct consw *csw, int first, int last, int deflt) 3655 { 3656 int err; 3657 3658 err = register_con_driver(csw, first, last); 3659 /* if we get an busy error we still want to bind the console driver 3660 * and return success, as we may have unbound the console driver 3661 * but not unregistered it. 3662 */ 3663 if (err == -EBUSY) 3664 err = 0; 3665 if (!err) 3666 bind_con_driver(csw, first, last, deflt); 3667 3668 return err; 3669 } 3670 3671 /* 3672 * give_up_console is a wrapper to unregister_con_driver. It will only 3673 * work if driver is fully unbound. 3674 */ 3675 void give_up_console(const struct consw *csw) 3676 { 3677 unregister_con_driver(csw); 3678 } 3679 3680 static int __init vtconsole_class_init(void) 3681 { 3682 int i; 3683 3684 vtconsole_class = class_create(THIS_MODULE, "vtconsole"); 3685 if (IS_ERR(vtconsole_class)) { 3686 printk(KERN_WARNING "Unable to create vt console class; " 3687 "errno = %ld\n", PTR_ERR(vtconsole_class)); 3688 vtconsole_class = NULL; 3689 } 3690 3691 /* Add system drivers to sysfs */ 3692 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3693 struct con_driver *con = ®istered_con_driver[i]; 3694 3695 if (con->con && !con->dev) { 3696 con->dev = device_create(vtconsole_class, NULL, 3697 MKDEV(0, con->node), 3698 NULL, "vtcon%i", 3699 con->node); 3700 3701 if (IS_ERR(con->dev)) { 3702 printk(KERN_WARNING "Unable to create " 3703 "device for %s; errno = %ld\n", 3704 con->desc, PTR_ERR(con->dev)); 3705 con->dev = NULL; 3706 } else { 3707 vtconsole_init_device(con); 3708 } 3709 } 3710 } 3711 3712 return 0; 3713 } 3714 postcore_initcall(vtconsole_class_init); 3715 3716 #endif 3717 3718 /* 3719 * Screen blanking 3720 */ 3721 3722 static int set_vesa_blanking(char __user *p) 3723 { 3724 unsigned int mode; 3725 3726 if (get_user(mode, p + 1)) 3727 return -EFAULT; 3728 3729 vesa_blank_mode = (mode < 4) ? mode : 0; 3730 return 0; 3731 } 3732 3733 void do_blank_screen(int entering_gfx) 3734 { 3735 struct vc_data *vc = vc_cons[fg_console].d; 3736 int i; 3737 3738 WARN_CONSOLE_UNLOCKED(); 3739 3740 if (console_blanked) { 3741 if (blank_state == blank_vesa_wait) { 3742 blank_state = blank_off; 3743 vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0); 3744 } 3745 return; 3746 } 3747 3748 /* entering graphics mode? */ 3749 if (entering_gfx) { 3750 hide_cursor(vc); 3751 save_screen(vc); 3752 vc->vc_sw->con_blank(vc, -1, 1); 3753 console_blanked = fg_console + 1; 3754 blank_state = blank_off; 3755 set_origin(vc); 3756 return; 3757 } 3758 3759 if (blank_state != blank_normal_wait) 3760 return; 3761 blank_state = blank_off; 3762 3763 /* don't blank graphics */ 3764 if (vc->vc_mode != KD_TEXT) { 3765 console_blanked = fg_console + 1; 3766 return; 3767 } 3768 3769 hide_cursor(vc); 3770 del_timer_sync(&console_timer); 3771 blank_timer_expired = 0; 3772 3773 save_screen(vc); 3774 /* In case we need to reset origin, blanking hook returns 1 */ 3775 i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0); 3776 console_blanked = fg_console + 1; 3777 if (i) 3778 set_origin(vc); 3779 3780 if (console_blank_hook && console_blank_hook(1)) 3781 return; 3782 3783 if (vesa_off_interval && vesa_blank_mode) { 3784 blank_state = blank_vesa_wait; 3785 mod_timer(&console_timer, jiffies + vesa_off_interval); 3786 } 3787 vt_event_post(VT_EVENT_BLANK, vc->vc_num, vc->vc_num); 3788 } 3789 EXPORT_SYMBOL(do_blank_screen); 3790 3791 /* 3792 * Called by timer as well as from vt_console_driver 3793 */ 3794 void do_unblank_screen(int leaving_gfx) 3795 { 3796 struct vc_data *vc; 3797 3798 /* This should now always be called from a "sane" (read: can schedule) 3799 * context for the sake of the low level drivers, except in the special 3800 * case of oops_in_progress 3801 */ 3802 if (!oops_in_progress) 3803 might_sleep(); 3804 3805 WARN_CONSOLE_UNLOCKED(); 3806 3807 ignore_poke = 0; 3808 if (!console_blanked) 3809 return; 3810 if (!vc_cons_allocated(fg_console)) { 3811 /* impossible */ 3812 printk("unblank_screen: tty %d not allocated ??\n", fg_console+1); 3813 return; 3814 } 3815 vc = vc_cons[fg_console].d; 3816 /* Try to unblank in oops case too */ 3817 if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc)) 3818 return; /* but leave console_blanked != 0 */ 3819 3820 if (blankinterval) { 3821 mod_timer(&console_timer, jiffies + (blankinterval * HZ)); 3822 blank_state = blank_normal_wait; 3823 } 3824 3825 console_blanked = 0; 3826 if (vc->vc_sw->con_blank(vc, 0, leaving_gfx) || vt_force_oops_output(vc)) 3827 /* Low-level driver cannot restore -> do it ourselves */ 3828 update_screen(vc); 3829 if (console_blank_hook) 3830 console_blank_hook(0); 3831 set_palette(vc); 3832 set_cursor(vc); 3833 vt_event_post(VT_EVENT_UNBLANK, vc->vc_num, vc->vc_num); 3834 } 3835 EXPORT_SYMBOL(do_unblank_screen); 3836 3837 /* 3838 * This is called by the outside world to cause a forced unblank, mostly for 3839 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually 3840 * call it with 1 as an argument and so force a mode restore... that may kill 3841 * X or at least garbage the screen but would also make the Oops visible... 3842 */ 3843 void unblank_screen(void) 3844 { 3845 do_unblank_screen(0); 3846 } 3847 3848 /* 3849 * We defer the timer blanking to work queue so it can take the console mutex 3850 * (console operations can still happen at irq time, but only from printk which 3851 * has the console mutex. Not perfect yet, but better than no locking 3852 */ 3853 static void blank_screen_t(unsigned long dummy) 3854 { 3855 if (unlikely(!keventd_up())) { 3856 mod_timer(&console_timer, jiffies + (blankinterval * HZ)); 3857 return; 3858 } 3859 blank_timer_expired = 1; 3860 schedule_work(&console_work); 3861 } 3862 3863 void poke_blanked_console(void) 3864 { 3865 WARN_CONSOLE_UNLOCKED(); 3866 3867 /* Add this so we quickly catch whoever might call us in a non 3868 * safe context. Nowadays, unblank_screen() isn't to be called in 3869 * atomic contexts and is allowed to schedule (with the special case 3870 * of oops_in_progress, but that isn't of any concern for this 3871 * function. --BenH. 3872 */ 3873 might_sleep(); 3874 3875 /* This isn't perfectly race free, but a race here would be mostly harmless, 3876 * at worse, we'll do a spurrious blank and it's unlikely 3877 */ 3878 del_timer(&console_timer); 3879 blank_timer_expired = 0; 3880 3881 if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS) 3882 return; 3883 if (console_blanked) 3884 unblank_screen(); 3885 else if (blankinterval) { 3886 mod_timer(&console_timer, jiffies + (blankinterval * HZ)); 3887 blank_state = blank_normal_wait; 3888 } 3889 } 3890 3891 /* 3892 * Palettes 3893 */ 3894 3895 static void set_palette(struct vc_data *vc) 3896 { 3897 WARN_CONSOLE_UNLOCKED(); 3898 3899 if (vc->vc_mode != KD_GRAPHICS) 3900 vc->vc_sw->con_set_palette(vc, color_table); 3901 } 3902 3903 static int set_get_cmap(unsigned char __user *arg, int set) 3904 { 3905 int i, j, k; 3906 3907 WARN_CONSOLE_UNLOCKED(); 3908 3909 for (i = 0; i < 16; i++) 3910 if (set) { 3911 get_user(default_red[i], arg++); 3912 get_user(default_grn[i], arg++); 3913 get_user(default_blu[i], arg++); 3914 } else { 3915 put_user(default_red[i], arg++); 3916 put_user(default_grn[i], arg++); 3917 put_user(default_blu[i], arg++); 3918 } 3919 if (set) { 3920 for (i = 0; i < MAX_NR_CONSOLES; i++) 3921 if (vc_cons_allocated(i)) { 3922 for (j = k = 0; j < 16; j++) { 3923 vc_cons[i].d->vc_palette[k++] = default_red[j]; 3924 vc_cons[i].d->vc_palette[k++] = default_grn[j]; 3925 vc_cons[i].d->vc_palette[k++] = default_blu[j]; 3926 } 3927 set_palette(vc_cons[i].d); 3928 } 3929 } 3930 return 0; 3931 } 3932 3933 /* 3934 * Load palette into the DAC registers. arg points to a colour 3935 * map, 3 bytes per colour, 16 colours, range from 0 to 255. 3936 */ 3937 3938 int con_set_cmap(unsigned char __user *arg) 3939 { 3940 int rc; 3941 3942 console_lock(); 3943 rc = set_get_cmap (arg,1); 3944 console_unlock(); 3945 3946 return rc; 3947 } 3948 3949 int con_get_cmap(unsigned char __user *arg) 3950 { 3951 int rc; 3952 3953 console_lock(); 3954 rc = set_get_cmap (arg,0); 3955 console_unlock(); 3956 3957 return rc; 3958 } 3959 3960 void reset_palette(struct vc_data *vc) 3961 { 3962 int j, k; 3963 for (j=k=0; j<16; j++) { 3964 vc->vc_palette[k++] = default_red[j]; 3965 vc->vc_palette[k++] = default_grn[j]; 3966 vc->vc_palette[k++] = default_blu[j]; 3967 } 3968 set_palette(vc); 3969 } 3970 3971 /* 3972 * Font switching 3973 * 3974 * Currently we only support fonts up to 32 pixels wide, at a maximum height 3975 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints, 3976 * depending on width) reserved for each character which is kinda wasty, but 3977 * this is done in order to maintain compatibility with the EGA/VGA fonts. It 3978 * is upto the actual low-level console-driver convert data into its favorite 3979 * format (maybe we should add a `fontoffset' field to the `display' 3980 * structure so we won't have to convert the fontdata all the time. 3981 * /Jes 3982 */ 3983 3984 #define max_font_size 65536 3985 3986 static int con_font_get(struct vc_data *vc, struct console_font_op *op) 3987 { 3988 struct console_font font; 3989 int rc = -EINVAL; 3990 int c; 3991 3992 if (vc->vc_mode != KD_TEXT) 3993 return -EINVAL; 3994 3995 if (op->data) { 3996 font.data = kmalloc(max_font_size, GFP_KERNEL); 3997 if (!font.data) 3998 return -ENOMEM; 3999 } else 4000 font.data = NULL; 4001 4002 console_lock(); 4003 if (vc->vc_sw->con_font_get) 4004 rc = vc->vc_sw->con_font_get(vc, &font); 4005 else 4006 rc = -ENOSYS; 4007 console_unlock(); 4008 4009 if (rc) 4010 goto out; 4011 4012 c = (font.width+7)/8 * 32 * font.charcount; 4013 4014 if (op->data && font.charcount > op->charcount) 4015 rc = -ENOSPC; 4016 if (!(op->flags & KD_FONT_FLAG_OLD)) { 4017 if (font.width > op->width || font.height > op->height) 4018 rc = -ENOSPC; 4019 } else { 4020 if (font.width != 8) 4021 rc = -EIO; 4022 else if ((op->height && font.height > op->height) || 4023 font.height > 32) 4024 rc = -ENOSPC; 4025 } 4026 if (rc) 4027 goto out; 4028 4029 op->height = font.height; 4030 op->width = font.width; 4031 op->charcount = font.charcount; 4032 4033 if (op->data && copy_to_user(op->data, font.data, c)) 4034 rc = -EFAULT; 4035 4036 out: 4037 kfree(font.data); 4038 return rc; 4039 } 4040 4041 static int con_font_set(struct vc_data *vc, struct console_font_op *op) 4042 { 4043 struct console_font font; 4044 int rc = -EINVAL; 4045 int size; 4046 4047 if (vc->vc_mode != KD_TEXT) 4048 return -EINVAL; 4049 if (!op->data) 4050 return -EINVAL; 4051 if (op->charcount > 512) 4052 return -EINVAL; 4053 if (!op->height) { /* Need to guess font height [compat] */ 4054 int h, i; 4055 u8 __user *charmap = op->data; 4056 u8 tmp; 4057 4058 /* If from KDFONTOP ioctl, don't allow things which can be done in userland, 4059 so that we can get rid of this soon */ 4060 if (!(op->flags & KD_FONT_FLAG_OLD)) 4061 return -EINVAL; 4062 for (h = 32; h > 0; h--) 4063 for (i = 0; i < op->charcount; i++) { 4064 if (get_user(tmp, &charmap[32*i+h-1])) 4065 return -EFAULT; 4066 if (tmp) 4067 goto nonzero; 4068 } 4069 return -EINVAL; 4070 nonzero: 4071 op->height = h; 4072 } 4073 if (op->width <= 0 || op->width > 32 || op->height > 32) 4074 return -EINVAL; 4075 size = (op->width+7)/8 * 32 * op->charcount; 4076 if (size > max_font_size) 4077 return -ENOSPC; 4078 font.charcount = op->charcount; 4079 font.height = op->height; 4080 font.width = op->width; 4081 font.data = memdup_user(op->data, size); 4082 if (IS_ERR(font.data)) 4083 return PTR_ERR(font.data); 4084 console_lock(); 4085 if (vc->vc_sw->con_font_set) 4086 rc = vc->vc_sw->con_font_set(vc, &font, op->flags); 4087 else 4088 rc = -ENOSYS; 4089 console_unlock(); 4090 kfree(font.data); 4091 return rc; 4092 } 4093 4094 static int con_font_default(struct vc_data *vc, struct console_font_op *op) 4095 { 4096 struct console_font font = {.width = op->width, .height = op->height}; 4097 char name[MAX_FONT_NAME]; 4098 char *s = name; 4099 int rc; 4100 4101 if (vc->vc_mode != KD_TEXT) 4102 return -EINVAL; 4103 4104 if (!op->data) 4105 s = NULL; 4106 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0) 4107 return -EFAULT; 4108 else 4109 name[MAX_FONT_NAME - 1] = 0; 4110 4111 console_lock(); 4112 if (vc->vc_sw->con_font_default) 4113 rc = vc->vc_sw->con_font_default(vc, &font, s); 4114 else 4115 rc = -ENOSYS; 4116 console_unlock(); 4117 if (!rc) { 4118 op->width = font.width; 4119 op->height = font.height; 4120 } 4121 return rc; 4122 } 4123 4124 static int con_font_copy(struct vc_data *vc, struct console_font_op *op) 4125 { 4126 int con = op->height; 4127 int rc; 4128 4129 if (vc->vc_mode != KD_TEXT) 4130 return -EINVAL; 4131 4132 console_lock(); 4133 if (!vc->vc_sw->con_font_copy) 4134 rc = -ENOSYS; 4135 else if (con < 0 || !vc_cons_allocated(con)) 4136 rc = -ENOTTY; 4137 else if (con == vc->vc_num) /* nothing to do */ 4138 rc = 0; 4139 else 4140 rc = vc->vc_sw->con_font_copy(vc, con); 4141 console_unlock(); 4142 return rc; 4143 } 4144 4145 int con_font_op(struct vc_data *vc, struct console_font_op *op) 4146 { 4147 switch (op->op) { 4148 case KD_FONT_OP_SET: 4149 return con_font_set(vc, op); 4150 case KD_FONT_OP_GET: 4151 return con_font_get(vc, op); 4152 case KD_FONT_OP_SET_DEFAULT: 4153 return con_font_default(vc, op); 4154 case KD_FONT_OP_COPY: 4155 return con_font_copy(vc, op); 4156 } 4157 return -ENOSYS; 4158 } 4159 4160 /* 4161 * Interface exported to selection and vcs. 4162 */ 4163 4164 /* used by selection */ 4165 u16 screen_glyph(struct vc_data *vc, int offset) 4166 { 4167 u16 w = scr_readw(screenpos(vc, offset, 1)); 4168 u16 c = w & 0xff; 4169 4170 if (w & vc->vc_hi_font_mask) 4171 c |= 0x100; 4172 return c; 4173 } 4174 EXPORT_SYMBOL_GPL(screen_glyph); 4175 4176 /* used by vcs - note the word offset */ 4177 unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed) 4178 { 4179 return screenpos(vc, 2 * w_offset, viewed); 4180 } 4181 4182 void getconsxy(struct vc_data *vc, unsigned char *p) 4183 { 4184 p[0] = vc->vc_x; 4185 p[1] = vc->vc_y; 4186 } 4187 4188 void putconsxy(struct vc_data *vc, unsigned char *p) 4189 { 4190 hide_cursor(vc); 4191 gotoxy(vc, p[0], p[1]); 4192 set_cursor(vc); 4193 } 4194 4195 u16 vcs_scr_readw(struct vc_data *vc, const u16 *org) 4196 { 4197 if ((unsigned long)org == vc->vc_pos && softcursor_original != -1) 4198 return softcursor_original; 4199 return scr_readw(org); 4200 } 4201 4202 void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org) 4203 { 4204 scr_writew(val, org); 4205 if ((unsigned long)org == vc->vc_pos) { 4206 softcursor_original = -1; 4207 add_softcursor(vc); 4208 } 4209 } 4210 4211 void vcs_scr_updated(struct vc_data *vc) 4212 { 4213 notify_update(vc); 4214 } 4215 4216 /* 4217 * Visible symbols for modules 4218 */ 4219 4220 EXPORT_SYMBOL(color_table); 4221 EXPORT_SYMBOL(default_red); 4222 EXPORT_SYMBOL(default_grn); 4223 EXPORT_SYMBOL(default_blu); 4224 EXPORT_SYMBOL(update_region); 4225 EXPORT_SYMBOL(redraw_screen); 4226 EXPORT_SYMBOL(vc_resize); 4227 EXPORT_SYMBOL(fg_console); 4228 EXPORT_SYMBOL(console_blank_hook); 4229 EXPORT_SYMBOL(console_blanked); 4230 EXPORT_SYMBOL(vc_cons); 4231 EXPORT_SYMBOL(global_cursor_default); 4232 #ifndef VT_SINGLE_DRIVER 4233 EXPORT_SYMBOL(take_over_console); 4234 EXPORT_SYMBOL(give_up_console); 4235 #endif 4236