1 /* 2 * Copyright (C) 1991, 1992 Linus Torvalds 3 */ 4 5 /* 6 * Hopefully this will be a rather complete VT102 implementation. 7 * 8 * Beeping thanks to John T Kohl. 9 * 10 * Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics 11 * Chars, and VT100 enhancements by Peter MacDonald. 12 * 13 * Copy and paste function by Andrew Haylett, 14 * some enhancements by Alessandro Rubini. 15 * 16 * Code to check for different video-cards mostly by Galen Hunt, 17 * <g-hunt@ee.utah.edu> 18 * 19 * Rudimentary ISO 10646/Unicode/UTF-8 character set support by 20 * Markus Kuhn, <mskuhn@immd4.informatik.uni-erlangen.de>. 21 * 22 * Dynamic allocation of consoles, aeb@cwi.nl, May 1994 23 * Resizing of consoles, aeb, 940926 24 * 25 * Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94 26 * <poe@daimi.aau.dk> 27 * 28 * User-defined bell sound, new setterm control sequences and printk 29 * redirection by Martin Mares <mj@k332.feld.cvut.cz> 19-Nov-95 30 * 31 * APM screenblank bug fixed Takashi Manabe <manabe@roy.dsl.tutics.tut.jp> 32 * 33 * Merge with the abstract console driver by Geert Uytterhoeven 34 * <geert@linux-m68k.org>, Jan 1997. 35 * 36 * Original m68k console driver modifications by 37 * 38 * - Arno Griffioen <arno@usn.nl> 39 * - David Carter <carter@cs.bris.ac.uk> 40 * 41 * The abstract console driver provides a generic interface for a text 42 * console. It supports VGA text mode, frame buffer based graphical consoles 43 * and special graphics processors that are only accessible through some 44 * registers (e.g. a TMS340x0 GSP). 45 * 46 * The interface to the hardware is specified using a special structure 47 * (struct consw) which contains function pointers to console operations 48 * (see <linux/console.h> for more information). 49 * 50 * Support for changeable cursor shape 51 * by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997 52 * 53 * Ported to i386 and con_scrolldelta fixed 54 * by Emmanuel Marty <core@ggi-project.org>, April 1998 55 * 56 * Resurrected character buffers in videoram plus lots of other trickery 57 * by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998 58 * 59 * Removed old-style timers, introduced console_timer, made timer 60 * deletion SMP-safe. 17Jun00, Andrew Morton 61 * 62 * Removed console_lock, enabled interrupts across all console operations 63 * 13 March 2001, Andrew Morton 64 * 65 * Fixed UTF-8 mode so alternate charset modes always work according 66 * to control sequences interpreted in do_con_trol function 67 * preserving backward VT100 semigraphics compatibility, 68 * malformed UTF sequences represented as sequences of replacement glyphs, 69 * original codes or '?' as a last resort if replacement glyph is undefined 70 * by Adam Tla/lka <atlka@pg.gda.pl>, Aug 2006 71 */ 72 73 #include <linux/module.h> 74 #include <linux/types.h> 75 #include <linux/sched.h> 76 #include <linux/tty.h> 77 #include <linux/tty_flip.h> 78 #include <linux/kernel.h> 79 #include <linux/string.h> 80 #include <linux/errno.h> 81 #include <linux/kd.h> 82 #include <linux/slab.h> 83 #include <linux/major.h> 84 #include <linux/mm.h> 85 #include <linux/console.h> 86 #include <linux/init.h> 87 #include <linux/mutex.h> 88 #include <linux/vt_kern.h> 89 #include <linux/selection.h> 90 #include <linux/tiocl.h> 91 #include <linux/kbd_kern.h> 92 #include <linux/consolemap.h> 93 #include <linux/timer.h> 94 #include <linux/interrupt.h> 95 #include <linux/workqueue.h> 96 #include <linux/pm.h> 97 #include <linux/font.h> 98 #include <linux/bitops.h> 99 #include <linux/notifier.h> 100 #include <linux/device.h> 101 #include <linux/io.h> 102 #include <linux/uaccess.h> 103 #include <linux/kdb.h> 104 #include <linux/ctype.h> 105 106 #define MAX_NR_CON_DRIVER 16 107 108 #define CON_DRIVER_FLAG_MODULE 1 109 #define CON_DRIVER_FLAG_INIT 2 110 #define CON_DRIVER_FLAG_ATTR 4 111 112 struct con_driver { 113 const struct consw *con; 114 const char *desc; 115 struct device *dev; 116 int node; 117 int first; 118 int last; 119 int flag; 120 }; 121 122 static struct con_driver registered_con_driver[MAX_NR_CON_DRIVER]; 123 const struct consw *conswitchp; 124 125 /* A bitmap for codes <32. A bit of 1 indicates that the code 126 * corresponding to that bit number invokes some special action 127 * (such as cursor movement) and should not be displayed as a 128 * glyph unless the disp_ctrl mode is explicitly enabled. 129 */ 130 #define CTRL_ACTION 0x0d00ff81 131 #define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */ 132 133 /* 134 * Here is the default bell parameters: 750HZ, 1/8th of a second 135 */ 136 #define DEFAULT_BELL_PITCH 750 137 #define DEFAULT_BELL_DURATION (HZ/8) 138 139 struct vc vc_cons [MAX_NR_CONSOLES]; 140 141 #ifndef VT_SINGLE_DRIVER 142 static const struct consw *con_driver_map[MAX_NR_CONSOLES]; 143 #endif 144 145 static int con_open(struct tty_struct *, struct file *); 146 static void vc_init(struct vc_data *vc, unsigned int rows, 147 unsigned int cols, int do_clear); 148 static void gotoxy(struct vc_data *vc, int new_x, int new_y); 149 static void save_cur(struct vc_data *vc); 150 static void reset_terminal(struct vc_data *vc, int do_clear); 151 static void con_flush_chars(struct tty_struct *tty); 152 static int set_vesa_blanking(char __user *p); 153 static void set_cursor(struct vc_data *vc); 154 static void hide_cursor(struct vc_data *vc); 155 static void console_callback(struct work_struct *ignored); 156 static void blank_screen_t(unsigned long dummy); 157 static void set_palette(struct vc_data *vc); 158 159 static int printable; /* Is console ready for printing? */ 160 int default_utf8 = true; 161 module_param(default_utf8, int, S_IRUGO | S_IWUSR); 162 int global_cursor_default = -1; 163 module_param(global_cursor_default, int, S_IRUGO | S_IWUSR); 164 165 static int cur_default = CUR_DEFAULT; 166 module_param(cur_default, int, S_IRUGO | S_IWUSR); 167 168 /* 169 * ignore_poke: don't unblank the screen when things are typed. This is 170 * mainly for the privacy of braille terminal users. 171 */ 172 static int ignore_poke; 173 174 int do_poke_blanked_console; 175 int console_blanked; 176 177 static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */ 178 static int vesa_off_interval; 179 static int blankinterval = 10*60; 180 core_param(consoleblank, blankinterval, int, 0444); 181 182 static DECLARE_WORK(console_work, console_callback); 183 184 /* 185 * fg_console is the current virtual console, 186 * last_console is the last used one, 187 * want_console is the console we want to switch to, 188 * saved_* variants are for save/restore around kernel debugger enter/leave 189 */ 190 int fg_console; 191 int last_console; 192 int want_console = -1; 193 static int saved_fg_console; 194 static int saved_last_console; 195 static int saved_want_console; 196 static int saved_vc_mode; 197 static int saved_console_blanked; 198 199 /* 200 * For each existing display, we have a pointer to console currently visible 201 * on that display, allowing consoles other than fg_console to be refreshed 202 * appropriately. Unless the low-level driver supplies its own display_fg 203 * variable, we use this one for the "master display". 204 */ 205 static struct vc_data *master_display_fg; 206 207 /* 208 * Unfortunately, we need to delay tty echo when we're currently writing to the 209 * console since the code is (and always was) not re-entrant, so we schedule 210 * all flip requests to process context with schedule-task() and run it from 211 * console_callback(). 212 */ 213 214 /* 215 * For the same reason, we defer scrollback to the console callback. 216 */ 217 static int scrollback_delta; 218 219 /* 220 * Hook so that the power management routines can (un)blank 221 * the console on our behalf. 222 */ 223 int (*console_blank_hook)(int); 224 225 static DEFINE_TIMER(console_timer, blank_screen_t, 0, 0); 226 static int blank_state; 227 static int blank_timer_expired; 228 enum { 229 blank_off = 0, 230 blank_normal_wait, 231 blank_vesa_wait, 232 }; 233 234 /* 235 * /sys/class/tty/tty0/ 236 * 237 * the attribute 'active' contains the name of the current vc 238 * console and it supports poll() to detect vc switches 239 */ 240 static struct device *tty0dev; 241 242 /* 243 * Notifier list for console events. 244 */ 245 static ATOMIC_NOTIFIER_HEAD(vt_notifier_list); 246 247 int register_vt_notifier(struct notifier_block *nb) 248 { 249 return atomic_notifier_chain_register(&vt_notifier_list, nb); 250 } 251 EXPORT_SYMBOL_GPL(register_vt_notifier); 252 253 int unregister_vt_notifier(struct notifier_block *nb) 254 { 255 return atomic_notifier_chain_unregister(&vt_notifier_list, nb); 256 } 257 EXPORT_SYMBOL_GPL(unregister_vt_notifier); 258 259 static void notify_write(struct vc_data *vc, unsigned int unicode) 260 { 261 struct vt_notifier_param param = { .vc = vc, .c = unicode }; 262 atomic_notifier_call_chain(&vt_notifier_list, VT_WRITE, ¶m); 263 } 264 265 static void notify_update(struct vc_data *vc) 266 { 267 struct vt_notifier_param param = { .vc = vc }; 268 atomic_notifier_call_chain(&vt_notifier_list, VT_UPDATE, ¶m); 269 } 270 /* 271 * Low-Level Functions 272 */ 273 274 #define IS_FG(vc) ((vc)->vc_num == fg_console) 275 276 #ifdef VT_BUF_VRAM_ONLY 277 #define DO_UPDATE(vc) 0 278 #else 279 #define DO_UPDATE(vc) (CON_IS_VISIBLE(vc) && !console_blanked) 280 #endif 281 282 static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed) 283 { 284 unsigned short *p; 285 286 if (!viewed) 287 p = (unsigned short *)(vc->vc_origin + offset); 288 else if (!vc->vc_sw->con_screen_pos) 289 p = (unsigned short *)(vc->vc_visible_origin + offset); 290 else 291 p = vc->vc_sw->con_screen_pos(vc, offset); 292 return p; 293 } 294 295 /* Called from the keyboard irq path.. */ 296 static inline void scrolldelta(int lines) 297 { 298 /* FIXME */ 299 /* scrolldelta needs some kind of consistency lock, but the BKL was 300 and still is not protecting versus the scheduled back end */ 301 scrollback_delta += lines; 302 schedule_console_callback(); 303 } 304 305 void schedule_console_callback(void) 306 { 307 schedule_work(&console_work); 308 } 309 310 static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr) 311 { 312 unsigned short *d, *s; 313 314 if (t+nr >= b) 315 nr = b - t - 1; 316 if (b > vc->vc_rows || t >= b || nr < 1) 317 return; 318 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr)) 319 return; 320 d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t); 321 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr)); 322 scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row); 323 scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_video_erase_char, 324 vc->vc_size_row * nr); 325 } 326 327 static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr) 328 { 329 unsigned short *s; 330 unsigned int step; 331 332 if (t+nr >= b) 333 nr = b - t - 1; 334 if (b > vc->vc_rows || t >= b || nr < 1) 335 return; 336 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr)) 337 return; 338 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t); 339 step = vc->vc_cols * nr; 340 scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row); 341 scr_memsetw(s, vc->vc_video_erase_char, 2 * step); 342 } 343 344 static void do_update_region(struct vc_data *vc, unsigned long start, int count) 345 { 346 #ifndef VT_BUF_VRAM_ONLY 347 unsigned int xx, yy, offset; 348 u16 *p; 349 350 p = (u16 *) start; 351 if (!vc->vc_sw->con_getxy) { 352 offset = (start - vc->vc_origin) / 2; 353 xx = offset % vc->vc_cols; 354 yy = offset / vc->vc_cols; 355 } else { 356 int nxx, nyy; 357 start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy); 358 xx = nxx; yy = nyy; 359 } 360 for(;;) { 361 u16 attrib = scr_readw(p) & 0xff00; 362 int startx = xx; 363 u16 *q = p; 364 while (xx < vc->vc_cols && count) { 365 if (attrib != (scr_readw(p) & 0xff00)) { 366 if (p > q) 367 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx); 368 startx = xx; 369 q = p; 370 attrib = scr_readw(p) & 0xff00; 371 } 372 p++; 373 xx++; 374 count--; 375 } 376 if (p > q) 377 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx); 378 if (!count) 379 break; 380 xx = 0; 381 yy++; 382 if (vc->vc_sw->con_getxy) { 383 p = (u16 *)start; 384 start = vc->vc_sw->con_getxy(vc, start, NULL, NULL); 385 } 386 } 387 #endif 388 } 389 390 void update_region(struct vc_data *vc, unsigned long start, int count) 391 { 392 WARN_CONSOLE_UNLOCKED(); 393 394 if (DO_UPDATE(vc)) { 395 hide_cursor(vc); 396 do_update_region(vc, start, count); 397 set_cursor(vc); 398 } 399 } 400 401 /* Structure of attributes is hardware-dependent */ 402 403 static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink, 404 u8 _underline, u8 _reverse, u8 _italic) 405 { 406 if (vc->vc_sw->con_build_attr) 407 return vc->vc_sw->con_build_attr(vc, _color, _intensity, 408 _blink, _underline, _reverse, _italic); 409 410 #ifndef VT_BUF_VRAM_ONLY 411 /* 412 * ++roman: I completely changed the attribute format for monochrome 413 * mode (!can_do_color). The formerly used MDA (monochrome display 414 * adapter) format didn't allow the combination of certain effects. 415 * Now the attribute is just a bit vector: 416 * Bit 0..1: intensity (0..2) 417 * Bit 2 : underline 418 * Bit 3 : reverse 419 * Bit 7 : blink 420 */ 421 { 422 u8 a = _color; 423 if (!vc->vc_can_do_color) 424 return _intensity | 425 (_italic ? 2 : 0) | 426 (_underline ? 4 : 0) | 427 (_reverse ? 8 : 0) | 428 (_blink ? 0x80 : 0); 429 if (_italic) 430 a = (a & 0xF0) | vc->vc_itcolor; 431 else if (_underline) 432 a = (a & 0xf0) | vc->vc_ulcolor; 433 else if (_intensity == 0) 434 a = (a & 0xf0) | vc->vc_ulcolor; 435 if (_reverse) 436 a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77); 437 if (_blink) 438 a ^= 0x80; 439 if (_intensity == 2) 440 a ^= 0x08; 441 if (vc->vc_hi_font_mask == 0x100) 442 a <<= 1; 443 return a; 444 } 445 #else 446 return 0; 447 #endif 448 } 449 450 static void update_attr(struct vc_data *vc) 451 { 452 vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity, 453 vc->vc_blink, vc->vc_underline, 454 vc->vc_reverse ^ vc->vc_decscnm, vc->vc_italic); 455 vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm, 0) << 8) | ' '; 456 } 457 458 /* Note: inverting the screen twice should revert to the original state */ 459 void invert_screen(struct vc_data *vc, int offset, int count, int viewed) 460 { 461 unsigned short *p; 462 463 WARN_CONSOLE_UNLOCKED(); 464 465 count /= 2; 466 p = screenpos(vc, offset, viewed); 467 if (vc->vc_sw->con_invert_region) 468 vc->vc_sw->con_invert_region(vc, p, count); 469 #ifndef VT_BUF_VRAM_ONLY 470 else { 471 u16 *q = p; 472 int cnt = count; 473 u16 a; 474 475 if (!vc->vc_can_do_color) { 476 while (cnt--) { 477 a = scr_readw(q); 478 a ^= 0x0800; 479 scr_writew(a, q); 480 q++; 481 } 482 } else if (vc->vc_hi_font_mask == 0x100) { 483 while (cnt--) { 484 a = scr_readw(q); 485 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4); 486 scr_writew(a, q); 487 q++; 488 } 489 } else { 490 while (cnt--) { 491 a = scr_readw(q); 492 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4); 493 scr_writew(a, q); 494 q++; 495 } 496 } 497 } 498 #endif 499 if (DO_UPDATE(vc)) 500 do_update_region(vc, (unsigned long) p, count); 501 } 502 503 /* used by selection: complement pointer position */ 504 void complement_pos(struct vc_data *vc, int offset) 505 { 506 static int old_offset = -1; 507 static unsigned short old; 508 static unsigned short oldx, oldy; 509 510 WARN_CONSOLE_UNLOCKED(); 511 512 if (old_offset != -1 && old_offset >= 0 && 513 old_offset < vc->vc_screenbuf_size) { 514 scr_writew(old, screenpos(vc, old_offset, 1)); 515 if (DO_UPDATE(vc)) 516 vc->vc_sw->con_putc(vc, old, oldy, oldx); 517 } 518 519 old_offset = offset; 520 521 if (offset != -1 && offset >= 0 && 522 offset < vc->vc_screenbuf_size) { 523 unsigned short new; 524 unsigned short *p; 525 p = screenpos(vc, offset, 1); 526 old = scr_readw(p); 527 new = old ^ vc->vc_complement_mask; 528 scr_writew(new, p); 529 if (DO_UPDATE(vc)) { 530 oldx = (offset >> 1) % vc->vc_cols; 531 oldy = (offset >> 1) / vc->vc_cols; 532 vc->vc_sw->con_putc(vc, new, oldy, oldx); 533 } 534 } 535 536 } 537 538 static void insert_char(struct vc_data *vc, unsigned int nr) 539 { 540 unsigned short *p = (unsigned short *) vc->vc_pos; 541 542 scr_memmovew(p + nr, p, (vc->vc_cols - vc->vc_x - nr) * 2); 543 scr_memsetw(p, vc->vc_video_erase_char, nr * 2); 544 vc->vc_need_wrap = 0; 545 if (DO_UPDATE(vc)) 546 do_update_region(vc, (unsigned long) p, 547 vc->vc_cols - vc->vc_x); 548 } 549 550 static void delete_char(struct vc_data *vc, unsigned int nr) 551 { 552 unsigned short *p = (unsigned short *) vc->vc_pos; 553 554 scr_memcpyw(p, p + nr, (vc->vc_cols - vc->vc_x - nr) * 2); 555 scr_memsetw(p + vc->vc_cols - vc->vc_x - nr, vc->vc_video_erase_char, 556 nr * 2); 557 vc->vc_need_wrap = 0; 558 if (DO_UPDATE(vc)) 559 do_update_region(vc, (unsigned long) p, 560 vc->vc_cols - vc->vc_x); 561 } 562 563 static int softcursor_original; 564 565 static void add_softcursor(struct vc_data *vc) 566 { 567 int i = scr_readw((u16 *) vc->vc_pos); 568 u32 type = vc->vc_cursor_type; 569 570 if (! (type & 0x10)) return; 571 if (softcursor_original != -1) return; 572 softcursor_original = i; 573 i |= ((type >> 8) & 0xff00 ); 574 i ^= ((type) & 0xff00 ); 575 if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000; 576 if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700; 577 scr_writew(i, (u16 *) vc->vc_pos); 578 if (DO_UPDATE(vc)) 579 vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x); 580 } 581 582 static void hide_softcursor(struct vc_data *vc) 583 { 584 if (softcursor_original != -1) { 585 scr_writew(softcursor_original, (u16 *)vc->vc_pos); 586 if (DO_UPDATE(vc)) 587 vc->vc_sw->con_putc(vc, softcursor_original, 588 vc->vc_y, vc->vc_x); 589 softcursor_original = -1; 590 } 591 } 592 593 static void hide_cursor(struct vc_data *vc) 594 { 595 if (vc == sel_cons) 596 clear_selection(); 597 vc->vc_sw->con_cursor(vc, CM_ERASE); 598 hide_softcursor(vc); 599 } 600 601 static void set_cursor(struct vc_data *vc) 602 { 603 if (!IS_FG(vc) || console_blanked || 604 vc->vc_mode == KD_GRAPHICS) 605 return; 606 if (vc->vc_deccm) { 607 if (vc == sel_cons) 608 clear_selection(); 609 add_softcursor(vc); 610 if ((vc->vc_cursor_type & 0x0f) != 1) 611 vc->vc_sw->con_cursor(vc, CM_DRAW); 612 } else 613 hide_cursor(vc); 614 } 615 616 static void set_origin(struct vc_data *vc) 617 { 618 WARN_CONSOLE_UNLOCKED(); 619 620 if (!CON_IS_VISIBLE(vc) || 621 !vc->vc_sw->con_set_origin || 622 !vc->vc_sw->con_set_origin(vc)) 623 vc->vc_origin = (unsigned long)vc->vc_screenbuf; 624 vc->vc_visible_origin = vc->vc_origin; 625 vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size; 626 vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x; 627 } 628 629 static inline void save_screen(struct vc_data *vc) 630 { 631 WARN_CONSOLE_UNLOCKED(); 632 633 if (vc->vc_sw->con_save_screen) 634 vc->vc_sw->con_save_screen(vc); 635 } 636 637 /* 638 * Redrawing of screen 639 */ 640 641 void clear_buffer_attributes(struct vc_data *vc) 642 { 643 unsigned short *p = (unsigned short *)vc->vc_origin; 644 int count = vc->vc_screenbuf_size / 2; 645 int mask = vc->vc_hi_font_mask | 0xff; 646 647 for (; count > 0; count--, p++) { 648 scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p); 649 } 650 } 651 652 void redraw_screen(struct vc_data *vc, int is_switch) 653 { 654 int redraw = 0; 655 656 WARN_CONSOLE_UNLOCKED(); 657 658 if (!vc) { 659 /* strange ... */ 660 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */ 661 return; 662 } 663 664 if (is_switch) { 665 struct vc_data *old_vc = vc_cons[fg_console].d; 666 if (old_vc == vc) 667 return; 668 if (!CON_IS_VISIBLE(vc)) 669 redraw = 1; 670 *vc->vc_display_fg = vc; 671 fg_console = vc->vc_num; 672 hide_cursor(old_vc); 673 if (!CON_IS_VISIBLE(old_vc)) { 674 save_screen(old_vc); 675 set_origin(old_vc); 676 } 677 if (tty0dev) 678 sysfs_notify(&tty0dev->kobj, NULL, "active"); 679 } else { 680 hide_cursor(vc); 681 redraw = 1; 682 } 683 684 if (redraw) { 685 int update; 686 int old_was_color = vc->vc_can_do_color; 687 688 set_origin(vc); 689 update = vc->vc_sw->con_switch(vc); 690 set_palette(vc); 691 /* 692 * If console changed from mono<->color, the best we can do 693 * is to clear the buffer attributes. As it currently stands, 694 * rebuilding new attributes from the old buffer is not doable 695 * without overly complex code. 696 */ 697 if (old_was_color != vc->vc_can_do_color) { 698 update_attr(vc); 699 clear_buffer_attributes(vc); 700 } 701 702 /* Forcibly update if we're panicing */ 703 if ((update && vc->vc_mode != KD_GRAPHICS) || 704 vt_force_oops_output(vc)) 705 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2); 706 } 707 set_cursor(vc); 708 if (is_switch) { 709 set_leds(); 710 compute_shiftstate(); 711 notify_update(vc); 712 } 713 } 714 715 /* 716 * Allocation, freeing and resizing of VTs. 717 */ 718 719 int vc_cons_allocated(unsigned int i) 720 { 721 return (i < MAX_NR_CONSOLES && vc_cons[i].d); 722 } 723 724 static void visual_init(struct vc_data *vc, int num, int init) 725 { 726 /* ++Geert: vc->vc_sw->con_init determines console size */ 727 if (vc->vc_sw) 728 module_put(vc->vc_sw->owner); 729 vc->vc_sw = conswitchp; 730 #ifndef VT_SINGLE_DRIVER 731 if (con_driver_map[num]) 732 vc->vc_sw = con_driver_map[num]; 733 #endif 734 __module_get(vc->vc_sw->owner); 735 vc->vc_num = num; 736 vc->vc_display_fg = &master_display_fg; 737 vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir; 738 vc->vc_uni_pagedir = NULL; 739 vc->vc_hi_font_mask = 0; 740 vc->vc_complement_mask = 0; 741 vc->vc_can_do_color = 0; 742 vc->vc_panic_force_write = false; 743 vc->vc_sw->con_init(vc, init); 744 if (!vc->vc_complement_mask) 745 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 746 vc->vc_s_complement_mask = vc->vc_complement_mask; 747 vc->vc_size_row = vc->vc_cols << 1; 748 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row; 749 } 750 751 int vc_allocate(unsigned int currcons) /* return 0 on success */ 752 { 753 WARN_CONSOLE_UNLOCKED(); 754 755 if (currcons >= MAX_NR_CONSOLES) 756 return -ENXIO; 757 if (!vc_cons[currcons].d) { 758 struct vc_data *vc; 759 struct vt_notifier_param param; 760 761 /* prevent users from taking too much memory */ 762 if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE)) 763 return -EPERM; 764 765 /* due to the granularity of kmalloc, we waste some memory here */ 766 /* the alloc is done in two steps, to optimize the common situation 767 of a 25x80 console (structsize=216, screenbuf_size=4000) */ 768 /* although the numbers above are not valid since long ago, the 769 point is still up-to-date and the comment still has its value 770 even if only as a historical artifact. --mj, July 1998 */ 771 param.vc = vc = kzalloc(sizeof(struct vc_data), GFP_KERNEL); 772 if (!vc) 773 return -ENOMEM; 774 vc_cons[currcons].d = vc; 775 tty_port_init(&vc->port); 776 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK); 777 visual_init(vc, currcons, 1); 778 if (!*vc->vc_uni_pagedir_loc) 779 con_set_default_unimap(vc); 780 vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL); 781 if (!vc->vc_screenbuf) { 782 kfree(vc); 783 vc_cons[currcons].d = NULL; 784 return -ENOMEM; 785 } 786 787 /* If no drivers have overridden us and the user didn't pass a 788 boot option, default to displaying the cursor */ 789 if (global_cursor_default == -1) 790 global_cursor_default = 1; 791 792 vc_init(vc, vc->vc_rows, vc->vc_cols, 1); 793 vcs_make_sysfs(currcons); 794 atomic_notifier_call_chain(&vt_notifier_list, VT_ALLOCATE, ¶m); 795 } 796 return 0; 797 } 798 799 static inline int resize_screen(struct vc_data *vc, int width, int height, 800 int user) 801 { 802 /* Resizes the resolution of the display adapater */ 803 int err = 0; 804 805 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize) 806 err = vc->vc_sw->con_resize(vc, width, height, user); 807 808 return err; 809 } 810 811 /* 812 * Change # of rows and columns (0 means unchanged/the size of fg_console) 813 * [this is to be used together with some user program 814 * like resize that changes the hardware videomode] 815 */ 816 #define VC_RESIZE_MAXCOL (32767) 817 #define VC_RESIZE_MAXROW (32767) 818 819 /** 820 * vc_do_resize - resizing method for the tty 821 * @tty: tty being resized 822 * @real_tty: real tty (different to tty if a pty/tty pair) 823 * @vc: virtual console private data 824 * @cols: columns 825 * @lines: lines 826 * 827 * Resize a virtual console, clipping according to the actual constraints. 828 * If the caller passes a tty structure then update the termios winsize 829 * information and perform any necessary signal handling. 830 * 831 * Caller must hold the console semaphore. Takes the termios rwsem and 832 * ctrl_lock of the tty IFF a tty is passed. 833 */ 834 835 static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc, 836 unsigned int cols, unsigned int lines) 837 { 838 unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0; 839 unsigned long end; 840 unsigned int old_rows, old_row_size; 841 unsigned int new_cols, new_rows, new_row_size, new_screen_size; 842 unsigned int user; 843 unsigned short *newscreen; 844 845 WARN_CONSOLE_UNLOCKED(); 846 847 if (!vc) 848 return -ENXIO; 849 850 user = vc->vc_resize_user; 851 vc->vc_resize_user = 0; 852 853 if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW) 854 return -EINVAL; 855 856 new_cols = (cols ? cols : vc->vc_cols); 857 new_rows = (lines ? lines : vc->vc_rows); 858 new_row_size = new_cols << 1; 859 new_screen_size = new_row_size * new_rows; 860 861 if (new_cols == vc->vc_cols && new_rows == vc->vc_rows) 862 return 0; 863 864 newscreen = kmalloc(new_screen_size, GFP_USER); 865 if (!newscreen) 866 return -ENOMEM; 867 868 old_rows = vc->vc_rows; 869 old_row_size = vc->vc_size_row; 870 871 err = resize_screen(vc, new_cols, new_rows, user); 872 if (err) { 873 kfree(newscreen); 874 return err; 875 } 876 877 vc->vc_rows = new_rows; 878 vc->vc_cols = new_cols; 879 vc->vc_size_row = new_row_size; 880 vc->vc_screenbuf_size = new_screen_size; 881 882 rlth = min(old_row_size, new_row_size); 883 rrem = new_row_size - rlth; 884 old_origin = vc->vc_origin; 885 new_origin = (long) newscreen; 886 new_scr_end = new_origin + new_screen_size; 887 888 if (vc->vc_y > new_rows) { 889 if (old_rows - vc->vc_y < new_rows) { 890 /* 891 * Cursor near the bottom, copy contents from the 892 * bottom of buffer 893 */ 894 old_origin += (old_rows - new_rows) * old_row_size; 895 } else { 896 /* 897 * Cursor is in no man's land, copy 1/2 screenful 898 * from the top and bottom of cursor position 899 */ 900 old_origin += (vc->vc_y - new_rows/2) * old_row_size; 901 } 902 } 903 904 end = old_origin + old_row_size * min(old_rows, new_rows); 905 906 update_attr(vc); 907 908 while (old_origin < end) { 909 scr_memcpyw((unsigned short *) new_origin, 910 (unsigned short *) old_origin, rlth); 911 if (rrem) 912 scr_memsetw((void *)(new_origin + rlth), 913 vc->vc_video_erase_char, rrem); 914 old_origin += old_row_size; 915 new_origin += new_row_size; 916 } 917 if (new_scr_end > new_origin) 918 scr_memsetw((void *)new_origin, vc->vc_video_erase_char, 919 new_scr_end - new_origin); 920 kfree(vc->vc_screenbuf); 921 vc->vc_screenbuf = newscreen; 922 vc->vc_screenbuf_size = new_screen_size; 923 set_origin(vc); 924 925 /* do part of a reset_terminal() */ 926 vc->vc_top = 0; 927 vc->vc_bottom = vc->vc_rows; 928 gotoxy(vc, vc->vc_x, vc->vc_y); 929 save_cur(vc); 930 931 if (tty) { 932 /* Rewrite the requested winsize data with the actual 933 resulting sizes */ 934 struct winsize ws; 935 memset(&ws, 0, sizeof(ws)); 936 ws.ws_row = vc->vc_rows; 937 ws.ws_col = vc->vc_cols; 938 ws.ws_ypixel = vc->vc_scan_lines; 939 tty_do_resize(tty, &ws); 940 } 941 942 if (CON_IS_VISIBLE(vc)) 943 update_screen(vc); 944 vt_event_post(VT_EVENT_RESIZE, vc->vc_num, vc->vc_num); 945 return err; 946 } 947 948 /** 949 * vc_resize - resize a VT 950 * @vc: virtual console 951 * @cols: columns 952 * @rows: rows 953 * 954 * Resize a virtual console as seen from the console end of things. We 955 * use the common vc_do_resize methods to update the structures. The 956 * caller must hold the console sem to protect console internals and 957 * vc->port.tty 958 */ 959 960 int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int rows) 961 { 962 return vc_do_resize(vc->port.tty, vc, cols, rows); 963 } 964 965 /** 966 * vt_resize - resize a VT 967 * @tty: tty to resize 968 * @ws: winsize attributes 969 * 970 * Resize a virtual terminal. This is called by the tty layer as we 971 * register our own handler for resizing. The mutual helper does all 972 * the actual work. 973 * 974 * Takes the console sem and the called methods then take the tty 975 * termios_rwsem and the tty ctrl_lock in that order. 976 */ 977 static int vt_resize(struct tty_struct *tty, struct winsize *ws) 978 { 979 struct vc_data *vc = tty->driver_data; 980 int ret; 981 982 console_lock(); 983 ret = vc_do_resize(tty, vc, ws->ws_col, ws->ws_row); 984 console_unlock(); 985 return ret; 986 } 987 988 struct vc_data *vc_deallocate(unsigned int currcons) 989 { 990 struct vc_data *vc = NULL; 991 992 WARN_CONSOLE_UNLOCKED(); 993 994 if (vc_cons_allocated(currcons)) { 995 struct vt_notifier_param param; 996 997 param.vc = vc = vc_cons[currcons].d; 998 atomic_notifier_call_chain(&vt_notifier_list, VT_DEALLOCATE, ¶m); 999 vcs_remove_sysfs(currcons); 1000 vc->vc_sw->con_deinit(vc); 1001 put_pid(vc->vt_pid); 1002 module_put(vc->vc_sw->owner); 1003 kfree(vc->vc_screenbuf); 1004 vc_cons[currcons].d = NULL; 1005 } 1006 return vc; 1007 } 1008 1009 /* 1010 * VT102 emulator 1011 */ 1012 1013 #define set_kbd(vc, x) vt_set_kbd_mode_bit((vc)->vc_num, (x)) 1014 #define clr_kbd(vc, x) vt_clr_kbd_mode_bit((vc)->vc_num, (x)) 1015 #define is_kbd(vc, x) vt_get_kbd_mode_bit((vc)->vc_num, (x)) 1016 1017 #define decarm VC_REPEAT 1018 #define decckm VC_CKMODE 1019 #define kbdapplic VC_APPLIC 1020 #define lnm VC_CRLF 1021 1022 /* 1023 * this is what the terminal answers to a ESC-Z or csi0c query. 1024 */ 1025 #define VT100ID "\033[?1;2c" 1026 #define VT102ID "\033[?6c" 1027 1028 unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7, 1029 8,12,10,14, 9,13,11,15 }; 1030 1031 /* the default colour table, for VGA+ colour systems */ 1032 int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa, 1033 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff}; 1034 int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa, 1035 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff}; 1036 int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa, 1037 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff}; 1038 1039 module_param_array(default_red, int, NULL, S_IRUGO | S_IWUSR); 1040 module_param_array(default_grn, int, NULL, S_IRUGO | S_IWUSR); 1041 module_param_array(default_blu, int, NULL, S_IRUGO | S_IWUSR); 1042 1043 /* 1044 * gotoxy() must verify all boundaries, because the arguments 1045 * might also be negative. If the given position is out of 1046 * bounds, the cursor is placed at the nearest margin. 1047 */ 1048 static void gotoxy(struct vc_data *vc, int new_x, int new_y) 1049 { 1050 int min_y, max_y; 1051 1052 if (new_x < 0) 1053 vc->vc_x = 0; 1054 else { 1055 if (new_x >= vc->vc_cols) 1056 vc->vc_x = vc->vc_cols - 1; 1057 else 1058 vc->vc_x = new_x; 1059 } 1060 1061 if (vc->vc_decom) { 1062 min_y = vc->vc_top; 1063 max_y = vc->vc_bottom; 1064 } else { 1065 min_y = 0; 1066 max_y = vc->vc_rows; 1067 } 1068 if (new_y < min_y) 1069 vc->vc_y = min_y; 1070 else if (new_y >= max_y) 1071 vc->vc_y = max_y - 1; 1072 else 1073 vc->vc_y = new_y; 1074 vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1); 1075 vc->vc_need_wrap = 0; 1076 } 1077 1078 /* for absolute user moves, when decom is set */ 1079 static void gotoxay(struct vc_data *vc, int new_x, int new_y) 1080 { 1081 gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y); 1082 } 1083 1084 void scrollback(struct vc_data *vc, int lines) 1085 { 1086 if (!lines) 1087 lines = vc->vc_rows / 2; 1088 scrolldelta(-lines); 1089 } 1090 1091 void scrollfront(struct vc_data *vc, int lines) 1092 { 1093 if (!lines) 1094 lines = vc->vc_rows / 2; 1095 scrolldelta(lines); 1096 } 1097 1098 static void lf(struct vc_data *vc) 1099 { 1100 /* don't scroll if above bottom of scrolling region, or 1101 * if below scrolling region 1102 */ 1103 if (vc->vc_y + 1 == vc->vc_bottom) 1104 scrup(vc, vc->vc_top, vc->vc_bottom, 1); 1105 else if (vc->vc_y < vc->vc_rows - 1) { 1106 vc->vc_y++; 1107 vc->vc_pos += vc->vc_size_row; 1108 } 1109 vc->vc_need_wrap = 0; 1110 notify_write(vc, '\n'); 1111 } 1112 1113 static void ri(struct vc_data *vc) 1114 { 1115 /* don't scroll if below top of scrolling region, or 1116 * if above scrolling region 1117 */ 1118 if (vc->vc_y == vc->vc_top) 1119 scrdown(vc, vc->vc_top, vc->vc_bottom, 1); 1120 else if (vc->vc_y > 0) { 1121 vc->vc_y--; 1122 vc->vc_pos -= vc->vc_size_row; 1123 } 1124 vc->vc_need_wrap = 0; 1125 } 1126 1127 static inline void cr(struct vc_data *vc) 1128 { 1129 vc->vc_pos -= vc->vc_x << 1; 1130 vc->vc_need_wrap = vc->vc_x = 0; 1131 notify_write(vc, '\r'); 1132 } 1133 1134 static inline void bs(struct vc_data *vc) 1135 { 1136 if (vc->vc_x) { 1137 vc->vc_pos -= 2; 1138 vc->vc_x--; 1139 vc->vc_need_wrap = 0; 1140 notify_write(vc, '\b'); 1141 } 1142 } 1143 1144 static inline void del(struct vc_data *vc) 1145 { 1146 /* ignored */ 1147 } 1148 1149 static void csi_J(struct vc_data *vc, int vpar) 1150 { 1151 unsigned int count; 1152 unsigned short * start; 1153 1154 switch (vpar) { 1155 case 0: /* erase from cursor to end of display */ 1156 count = (vc->vc_scr_end - vc->vc_pos) >> 1; 1157 start = (unsigned short *)vc->vc_pos; 1158 break; 1159 case 1: /* erase from start to cursor */ 1160 count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1; 1161 start = (unsigned short *)vc->vc_origin; 1162 break; 1163 case 3: /* erase scroll-back buffer (and whole display) */ 1164 scr_memsetw(vc->vc_screenbuf, vc->vc_video_erase_char, 1165 vc->vc_screenbuf_size >> 1); 1166 set_origin(vc); 1167 if (CON_IS_VISIBLE(vc)) 1168 update_screen(vc); 1169 /* fall through */ 1170 case 2: /* erase whole display */ 1171 count = vc->vc_cols * vc->vc_rows; 1172 start = (unsigned short *)vc->vc_origin; 1173 break; 1174 default: 1175 return; 1176 } 1177 scr_memsetw(start, vc->vc_video_erase_char, 2 * count); 1178 if (DO_UPDATE(vc)) 1179 do_update_region(vc, (unsigned long) start, count); 1180 vc->vc_need_wrap = 0; 1181 } 1182 1183 static void csi_K(struct vc_data *vc, int vpar) 1184 { 1185 unsigned int count; 1186 unsigned short * start; 1187 1188 switch (vpar) { 1189 case 0: /* erase from cursor to end of line */ 1190 count = vc->vc_cols - vc->vc_x; 1191 start = (unsigned short *)vc->vc_pos; 1192 break; 1193 case 1: /* erase from start of line to cursor */ 1194 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1)); 1195 count = vc->vc_x + 1; 1196 break; 1197 case 2: /* erase whole line */ 1198 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1)); 1199 count = vc->vc_cols; 1200 break; 1201 default: 1202 return; 1203 } 1204 scr_memsetw(start, vc->vc_video_erase_char, 2 * count); 1205 vc->vc_need_wrap = 0; 1206 if (DO_UPDATE(vc)) 1207 do_update_region(vc, (unsigned long) start, count); 1208 } 1209 1210 static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */ 1211 { /* not vt100? */ 1212 int count; 1213 1214 if (!vpar) 1215 vpar++; 1216 count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar; 1217 1218 scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count); 1219 if (DO_UPDATE(vc)) 1220 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count); 1221 vc->vc_need_wrap = 0; 1222 } 1223 1224 static void default_attr(struct vc_data *vc) 1225 { 1226 vc->vc_intensity = 1; 1227 vc->vc_italic = 0; 1228 vc->vc_underline = 0; 1229 vc->vc_reverse = 0; 1230 vc->vc_blink = 0; 1231 vc->vc_color = vc->vc_def_color; 1232 } 1233 1234 struct rgb { u8 r; u8 g; u8 b; }; 1235 1236 struct rgb rgb_from_256(int i) 1237 { 1238 struct rgb c; 1239 if (i < 8) { /* Standard colours. */ 1240 c.r = i&1 ? 0xaa : 0x00; 1241 c.g = i&2 ? 0xaa : 0x00; 1242 c.b = i&4 ? 0xaa : 0x00; 1243 } else if (i < 16) { 1244 c.r = i&1 ? 0xff : 0x55; 1245 c.g = i&2 ? 0xff : 0x55; 1246 c.b = i&4 ? 0xff : 0x55; 1247 } else if (i < 232) { /* 6x6x6 colour cube. */ 1248 c.r = (i - 16) / 36 * 85 / 2; 1249 c.g = (i - 16) / 6 % 6 * 85 / 2; 1250 c.b = (i - 16) % 6 * 85 / 2; 1251 } else /* Grayscale ramp. */ 1252 c.r = c.g = c.b = i * 10 - 2312; 1253 return c; 1254 } 1255 1256 static void rgb_foreground(struct vc_data *vc, struct rgb c) 1257 { 1258 u8 hue, max = c.r; 1259 if (c.g > max) 1260 max = c.g; 1261 if (c.b > max) 1262 max = c.b; 1263 hue = (c.r > max/2 ? 4 : 0) 1264 | (c.g > max/2 ? 2 : 0) 1265 | (c.b > max/2 ? 1 : 0); 1266 if (hue == 7 && max <= 0x55) 1267 hue = 0, vc->vc_intensity = 2; 1268 else 1269 vc->vc_intensity = (max > 0xaa) + 1; 1270 vc->vc_color = (vc->vc_color & 0xf0) | hue; 1271 } 1272 1273 static void rgb_background(struct vc_data *vc, struct rgb c) 1274 { 1275 /* For backgrounds, err on the dark side. */ 1276 vc->vc_color = (vc->vc_color & 0x0f) 1277 | (c.r&0x80) >> 1 | (c.g&0x80) >> 2 | (c.b&0x80) >> 3; 1278 } 1279 1280 /* console_lock is held */ 1281 static void csi_m(struct vc_data *vc) 1282 { 1283 int i; 1284 1285 for (i = 0; i <= vc->vc_npar; i++) 1286 switch (vc->vc_par[i]) { 1287 case 0: /* all attributes off */ 1288 default_attr(vc); 1289 break; 1290 case 1: 1291 vc->vc_intensity = 2; 1292 break; 1293 case 2: 1294 vc->vc_intensity = 0; 1295 break; 1296 case 3: 1297 vc->vc_italic = 1; 1298 break; 1299 case 4: 1300 vc->vc_underline = 1; 1301 break; 1302 case 5: 1303 vc->vc_blink = 1; 1304 break; 1305 case 7: 1306 vc->vc_reverse = 1; 1307 break; 1308 case 10: /* ANSI X3.64-1979 (SCO-ish?) 1309 * Select primary font, don't display 1310 * control chars if defined, don't set 1311 * bit 8 on output. 1312 */ 1313 vc->vc_translate = set_translate(vc->vc_charset == 0 1314 ? vc->vc_G0_charset 1315 : vc->vc_G1_charset, vc); 1316 vc->vc_disp_ctrl = 0; 1317 vc->vc_toggle_meta = 0; 1318 break; 1319 case 11: /* ANSI X3.64-1979 (SCO-ish?) 1320 * Select first alternate font, lets 1321 * chars < 32 be displayed as ROM chars. 1322 */ 1323 vc->vc_translate = set_translate(IBMPC_MAP, vc); 1324 vc->vc_disp_ctrl = 1; 1325 vc->vc_toggle_meta = 0; 1326 break; 1327 case 12: /* ANSI X3.64-1979 (SCO-ish?) 1328 * Select second alternate font, toggle 1329 * high bit before displaying as ROM char. 1330 */ 1331 vc->vc_translate = set_translate(IBMPC_MAP, vc); 1332 vc->vc_disp_ctrl = 1; 1333 vc->vc_toggle_meta = 1; 1334 break; 1335 case 21: 1336 case 22: 1337 vc->vc_intensity = 1; 1338 break; 1339 case 23: 1340 vc->vc_italic = 0; 1341 break; 1342 case 24: 1343 vc->vc_underline = 0; 1344 break; 1345 case 25: 1346 vc->vc_blink = 0; 1347 break; 1348 case 27: 1349 vc->vc_reverse = 0; 1350 break; 1351 case 38: /* ITU T.416 1352 * Higher colour modes. 1353 * They break the usual properties of SGR codes 1354 * and thus need to be detected and ignored by 1355 * hand. Strictly speaking, that standard also 1356 * wants : rather than ; as separators, contrary 1357 * to ECMA-48, but no one produces such codes 1358 * and almost no one accepts them. 1359 */ 1360 i++; 1361 if (i > vc->vc_npar) 1362 break; 1363 if (vc->vc_par[i] == 5 && /* 256 colours */ 1364 i < vc->vc_npar) { /* ubiquitous */ 1365 i++; 1366 rgb_foreground(vc, 1367 rgb_from_256(vc->vc_par[i])); 1368 } else if (vc->vc_par[i] == 2 && /* 24 bit */ 1369 i <= vc->vc_npar + 3) {/* extremely rare */ 1370 struct rgb c = {r:vc->vc_par[i+1], 1371 g:vc->vc_par[i+2], 1372 b:vc->vc_par[i+3]}; 1373 rgb_foreground(vc, c); 1374 i += 3; 1375 } 1376 /* Subcommands 3 (CMY) and 4 (CMYK) are so insane 1377 * there's no point in supporting them. 1378 */ 1379 break; 1380 case 48: 1381 i++; 1382 if (i > vc->vc_npar) 1383 break; 1384 if (vc->vc_par[i] == 5 && /* 256 colours */ 1385 i < vc->vc_npar) { 1386 i++; 1387 rgb_background(vc, 1388 rgb_from_256(vc->vc_par[i])); 1389 } else if (vc->vc_par[i] == 2 && /* 24 bit */ 1390 i <= vc->vc_npar + 3) { 1391 struct rgb c = {r:vc->vc_par[i+1], 1392 g:vc->vc_par[i+2], 1393 b:vc->vc_par[i+3]}; 1394 rgb_background(vc, c); 1395 i += 3; 1396 } 1397 break; 1398 case 39: 1399 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0); 1400 break; 1401 case 49: 1402 vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f); 1403 break; 1404 default: 1405 if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37) 1406 vc->vc_color = color_table[vc->vc_par[i] - 30] 1407 | (vc->vc_color & 0xf0); 1408 else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47) 1409 vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4) 1410 | (vc->vc_color & 0x0f); 1411 break; 1412 } 1413 update_attr(vc); 1414 } 1415 1416 static void respond_string(const char *p, struct tty_port *port) 1417 { 1418 while (*p) { 1419 tty_insert_flip_char(port, *p, 0); 1420 p++; 1421 } 1422 tty_schedule_flip(port); 1423 } 1424 1425 static void cursor_report(struct vc_data *vc, struct tty_struct *tty) 1426 { 1427 char buf[40]; 1428 1429 sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1); 1430 respond_string(buf, tty->port); 1431 } 1432 1433 static inline void status_report(struct tty_struct *tty) 1434 { 1435 respond_string("\033[0n", tty->port); /* Terminal ok */ 1436 } 1437 1438 static inline void respond_ID(struct tty_struct *tty) 1439 { 1440 respond_string(VT102ID, tty->port); 1441 } 1442 1443 void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry) 1444 { 1445 char buf[8]; 1446 1447 sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx), 1448 (char)('!' + mry)); 1449 respond_string(buf, tty->port); 1450 } 1451 1452 /* invoked via ioctl(TIOCLINUX) and through set_selection */ 1453 int mouse_reporting(void) 1454 { 1455 return vc_cons[fg_console].d->vc_report_mouse; 1456 } 1457 1458 /* console_lock is held */ 1459 static void set_mode(struct vc_data *vc, int on_off) 1460 { 1461 int i; 1462 1463 for (i = 0; i <= vc->vc_npar; i++) 1464 if (vc->vc_ques) { 1465 switch(vc->vc_par[i]) { /* DEC private modes set/reset */ 1466 case 1: /* Cursor keys send ^[Ox/^[[x */ 1467 if (on_off) 1468 set_kbd(vc, decckm); 1469 else 1470 clr_kbd(vc, decckm); 1471 break; 1472 case 3: /* 80/132 mode switch unimplemented */ 1473 vc->vc_deccolm = on_off; 1474 #if 0 1475 vc_resize(deccolm ? 132 : 80, vc->vc_rows); 1476 /* this alone does not suffice; some user mode 1477 utility has to change the hardware regs */ 1478 #endif 1479 break; 1480 case 5: /* Inverted screen on/off */ 1481 if (vc->vc_decscnm != on_off) { 1482 vc->vc_decscnm = on_off; 1483 invert_screen(vc, 0, vc->vc_screenbuf_size, 0); 1484 update_attr(vc); 1485 } 1486 break; 1487 case 6: /* Origin relative/absolute */ 1488 vc->vc_decom = on_off; 1489 gotoxay(vc, 0, 0); 1490 break; 1491 case 7: /* Autowrap on/off */ 1492 vc->vc_decawm = on_off; 1493 break; 1494 case 8: /* Autorepeat on/off */ 1495 if (on_off) 1496 set_kbd(vc, decarm); 1497 else 1498 clr_kbd(vc, decarm); 1499 break; 1500 case 9: 1501 vc->vc_report_mouse = on_off ? 1 : 0; 1502 break; 1503 case 25: /* Cursor on/off */ 1504 vc->vc_deccm = on_off; 1505 break; 1506 case 1000: 1507 vc->vc_report_mouse = on_off ? 2 : 0; 1508 break; 1509 } 1510 } else { 1511 switch(vc->vc_par[i]) { /* ANSI modes set/reset */ 1512 case 3: /* Monitor (display ctrls) */ 1513 vc->vc_disp_ctrl = on_off; 1514 break; 1515 case 4: /* Insert Mode on/off */ 1516 vc->vc_decim = on_off; 1517 break; 1518 case 20: /* Lf, Enter == CrLf/Lf */ 1519 if (on_off) 1520 set_kbd(vc, lnm); 1521 else 1522 clr_kbd(vc, lnm); 1523 break; 1524 } 1525 } 1526 } 1527 1528 /* console_lock is held */ 1529 static void setterm_command(struct vc_data *vc) 1530 { 1531 switch(vc->vc_par[0]) { 1532 case 1: /* set color for underline mode */ 1533 if (vc->vc_can_do_color && 1534 vc->vc_par[1] < 16) { 1535 vc->vc_ulcolor = color_table[vc->vc_par[1]]; 1536 if (vc->vc_underline) 1537 update_attr(vc); 1538 } 1539 break; 1540 case 2: /* set color for half intensity mode */ 1541 if (vc->vc_can_do_color && 1542 vc->vc_par[1] < 16) { 1543 vc->vc_halfcolor = color_table[vc->vc_par[1]]; 1544 if (vc->vc_intensity == 0) 1545 update_attr(vc); 1546 } 1547 break; 1548 case 8: /* store colors as defaults */ 1549 vc->vc_def_color = vc->vc_attr; 1550 if (vc->vc_hi_font_mask == 0x100) 1551 vc->vc_def_color >>= 1; 1552 default_attr(vc); 1553 update_attr(vc); 1554 break; 1555 case 9: /* set blanking interval */ 1556 blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60; 1557 poke_blanked_console(); 1558 break; 1559 case 10: /* set bell frequency in Hz */ 1560 if (vc->vc_npar >= 1) 1561 vc->vc_bell_pitch = vc->vc_par[1]; 1562 else 1563 vc->vc_bell_pitch = DEFAULT_BELL_PITCH; 1564 break; 1565 case 11: /* set bell duration in msec */ 1566 if (vc->vc_npar >= 1) 1567 vc->vc_bell_duration = (vc->vc_par[1] < 2000) ? 1568 vc->vc_par[1] * HZ / 1000 : 0; 1569 else 1570 vc->vc_bell_duration = DEFAULT_BELL_DURATION; 1571 break; 1572 case 12: /* bring specified console to the front */ 1573 if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1)) 1574 set_console(vc->vc_par[1] - 1); 1575 break; 1576 case 13: /* unblank the screen */ 1577 poke_blanked_console(); 1578 break; 1579 case 14: /* set vesa powerdown interval */ 1580 vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ; 1581 break; 1582 case 15: /* activate the previous console */ 1583 set_console(last_console); 1584 break; 1585 } 1586 } 1587 1588 /* console_lock is held */ 1589 static void csi_at(struct vc_data *vc, unsigned int nr) 1590 { 1591 if (nr > vc->vc_cols - vc->vc_x) 1592 nr = vc->vc_cols - vc->vc_x; 1593 else if (!nr) 1594 nr = 1; 1595 insert_char(vc, nr); 1596 } 1597 1598 /* console_lock is held */ 1599 static void csi_L(struct vc_data *vc, unsigned int nr) 1600 { 1601 if (nr > vc->vc_rows - vc->vc_y) 1602 nr = vc->vc_rows - vc->vc_y; 1603 else if (!nr) 1604 nr = 1; 1605 scrdown(vc, vc->vc_y, vc->vc_bottom, nr); 1606 vc->vc_need_wrap = 0; 1607 } 1608 1609 /* console_lock is held */ 1610 static void csi_P(struct vc_data *vc, unsigned int nr) 1611 { 1612 if (nr > vc->vc_cols - vc->vc_x) 1613 nr = vc->vc_cols - vc->vc_x; 1614 else if (!nr) 1615 nr = 1; 1616 delete_char(vc, nr); 1617 } 1618 1619 /* console_lock is held */ 1620 static void csi_M(struct vc_data *vc, unsigned int nr) 1621 { 1622 if (nr > vc->vc_rows - vc->vc_y) 1623 nr = vc->vc_rows - vc->vc_y; 1624 else if (!nr) 1625 nr=1; 1626 scrup(vc, vc->vc_y, vc->vc_bottom, nr); 1627 vc->vc_need_wrap = 0; 1628 } 1629 1630 /* console_lock is held (except via vc_init->reset_terminal */ 1631 static void save_cur(struct vc_data *vc) 1632 { 1633 vc->vc_saved_x = vc->vc_x; 1634 vc->vc_saved_y = vc->vc_y; 1635 vc->vc_s_intensity = vc->vc_intensity; 1636 vc->vc_s_italic = vc->vc_italic; 1637 vc->vc_s_underline = vc->vc_underline; 1638 vc->vc_s_blink = vc->vc_blink; 1639 vc->vc_s_reverse = vc->vc_reverse; 1640 vc->vc_s_charset = vc->vc_charset; 1641 vc->vc_s_color = vc->vc_color; 1642 vc->vc_saved_G0 = vc->vc_G0_charset; 1643 vc->vc_saved_G1 = vc->vc_G1_charset; 1644 } 1645 1646 /* console_lock is held */ 1647 static void restore_cur(struct vc_data *vc) 1648 { 1649 gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y); 1650 vc->vc_intensity = vc->vc_s_intensity; 1651 vc->vc_italic = vc->vc_s_italic; 1652 vc->vc_underline = vc->vc_s_underline; 1653 vc->vc_blink = vc->vc_s_blink; 1654 vc->vc_reverse = vc->vc_s_reverse; 1655 vc->vc_charset = vc->vc_s_charset; 1656 vc->vc_color = vc->vc_s_color; 1657 vc->vc_G0_charset = vc->vc_saved_G0; 1658 vc->vc_G1_charset = vc->vc_saved_G1; 1659 vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc); 1660 update_attr(vc); 1661 vc->vc_need_wrap = 0; 1662 } 1663 1664 enum { ESnormal, ESesc, ESsquare, ESgetpars, ESfunckey, 1665 EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd, 1666 ESpalette, ESosc }; 1667 1668 /* console_lock is held (except via vc_init()) */ 1669 static void reset_terminal(struct vc_data *vc, int do_clear) 1670 { 1671 vc->vc_top = 0; 1672 vc->vc_bottom = vc->vc_rows; 1673 vc->vc_state = ESnormal; 1674 vc->vc_ques = 0; 1675 vc->vc_translate = set_translate(LAT1_MAP, vc); 1676 vc->vc_G0_charset = LAT1_MAP; 1677 vc->vc_G1_charset = GRAF_MAP; 1678 vc->vc_charset = 0; 1679 vc->vc_need_wrap = 0; 1680 vc->vc_report_mouse = 0; 1681 vc->vc_utf = default_utf8; 1682 vc->vc_utf_count = 0; 1683 1684 vc->vc_disp_ctrl = 0; 1685 vc->vc_toggle_meta = 0; 1686 1687 vc->vc_decscnm = 0; 1688 vc->vc_decom = 0; 1689 vc->vc_decawm = 1; 1690 vc->vc_deccm = global_cursor_default; 1691 vc->vc_decim = 0; 1692 1693 vt_reset_keyboard(vc->vc_num); 1694 1695 vc->vc_cursor_type = cur_default; 1696 vc->vc_complement_mask = vc->vc_s_complement_mask; 1697 1698 default_attr(vc); 1699 update_attr(vc); 1700 1701 vc->vc_tab_stop[0] = 0x01010100; 1702 vc->vc_tab_stop[1] = 1703 vc->vc_tab_stop[2] = 1704 vc->vc_tab_stop[3] = 1705 vc->vc_tab_stop[4] = 1706 vc->vc_tab_stop[5] = 1707 vc->vc_tab_stop[6] = 1708 vc->vc_tab_stop[7] = 0x01010101; 1709 1710 vc->vc_bell_pitch = DEFAULT_BELL_PITCH; 1711 vc->vc_bell_duration = DEFAULT_BELL_DURATION; 1712 1713 gotoxy(vc, 0, 0); 1714 save_cur(vc); 1715 if (do_clear) 1716 csi_J(vc, 2); 1717 } 1718 1719 /* console_lock is held */ 1720 static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c) 1721 { 1722 /* 1723 * Control characters can be used in the _middle_ 1724 * of an escape sequence. 1725 */ 1726 if (vc->vc_state == ESosc && c>=8 && c<=13) /* ... except for OSC */ 1727 return; 1728 switch (c) { 1729 case 0: 1730 return; 1731 case 7: 1732 if (vc->vc_state == ESosc) 1733 vc->vc_state = ESnormal; 1734 else if (vc->vc_bell_duration) 1735 kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration); 1736 return; 1737 case 8: 1738 bs(vc); 1739 return; 1740 case 9: 1741 vc->vc_pos -= (vc->vc_x << 1); 1742 while (vc->vc_x < vc->vc_cols - 1) { 1743 vc->vc_x++; 1744 if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31))) 1745 break; 1746 } 1747 vc->vc_pos += (vc->vc_x << 1); 1748 notify_write(vc, '\t'); 1749 return; 1750 case 10: case 11: case 12: 1751 lf(vc); 1752 if (!is_kbd(vc, lnm)) 1753 return; 1754 case 13: 1755 cr(vc); 1756 return; 1757 case 14: 1758 vc->vc_charset = 1; 1759 vc->vc_translate = set_translate(vc->vc_G1_charset, vc); 1760 vc->vc_disp_ctrl = 1; 1761 return; 1762 case 15: 1763 vc->vc_charset = 0; 1764 vc->vc_translate = set_translate(vc->vc_G0_charset, vc); 1765 vc->vc_disp_ctrl = 0; 1766 return; 1767 case 24: case 26: 1768 vc->vc_state = ESnormal; 1769 return; 1770 case 27: 1771 vc->vc_state = ESesc; 1772 return; 1773 case 127: 1774 del(vc); 1775 return; 1776 case 128+27: 1777 vc->vc_state = ESsquare; 1778 return; 1779 } 1780 switch(vc->vc_state) { 1781 case ESesc: 1782 vc->vc_state = ESnormal; 1783 switch (c) { 1784 case '[': 1785 vc->vc_state = ESsquare; 1786 return; 1787 case ']': 1788 vc->vc_state = ESnonstd; 1789 return; 1790 case '%': 1791 vc->vc_state = ESpercent; 1792 return; 1793 case 'E': 1794 cr(vc); 1795 lf(vc); 1796 return; 1797 case 'M': 1798 ri(vc); 1799 return; 1800 case 'D': 1801 lf(vc); 1802 return; 1803 case 'H': 1804 vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31)); 1805 return; 1806 case 'Z': 1807 respond_ID(tty); 1808 return; 1809 case '7': 1810 save_cur(vc); 1811 return; 1812 case '8': 1813 restore_cur(vc); 1814 return; 1815 case '(': 1816 vc->vc_state = ESsetG0; 1817 return; 1818 case ')': 1819 vc->vc_state = ESsetG1; 1820 return; 1821 case '#': 1822 vc->vc_state = EShash; 1823 return; 1824 case 'c': 1825 reset_terminal(vc, 1); 1826 return; 1827 case '>': /* Numeric keypad */ 1828 clr_kbd(vc, kbdapplic); 1829 return; 1830 case '=': /* Appl. keypad */ 1831 set_kbd(vc, kbdapplic); 1832 return; 1833 } 1834 return; 1835 case ESnonstd: 1836 if (c=='P') { /* palette escape sequence */ 1837 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++) 1838 vc->vc_par[vc->vc_npar] = 0; 1839 vc->vc_npar = 0; 1840 vc->vc_state = ESpalette; 1841 return; 1842 } else if (c=='R') { /* reset palette */ 1843 reset_palette(vc); 1844 vc->vc_state = ESnormal; 1845 } else if (c>='0' && c<='9') 1846 vc->vc_state = ESosc; 1847 else 1848 vc->vc_state = ESnormal; 1849 return; 1850 case ESpalette: 1851 if (isxdigit(c)) { 1852 vc->vc_par[vc->vc_npar++] = hex_to_bin(c); 1853 if (vc->vc_npar == 7) { 1854 int i = vc->vc_par[0] * 3, j = 1; 1855 vc->vc_palette[i] = 16 * vc->vc_par[j++]; 1856 vc->vc_palette[i++] += vc->vc_par[j++]; 1857 vc->vc_palette[i] = 16 * vc->vc_par[j++]; 1858 vc->vc_palette[i++] += vc->vc_par[j++]; 1859 vc->vc_palette[i] = 16 * vc->vc_par[j++]; 1860 vc->vc_palette[i] += vc->vc_par[j]; 1861 set_palette(vc); 1862 vc->vc_state = ESnormal; 1863 } 1864 } else 1865 vc->vc_state = ESnormal; 1866 return; 1867 case ESsquare: 1868 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++) 1869 vc->vc_par[vc->vc_npar] = 0; 1870 vc->vc_npar = 0; 1871 vc->vc_state = ESgetpars; 1872 if (c == '[') { /* Function key */ 1873 vc->vc_state=ESfunckey; 1874 return; 1875 } 1876 vc->vc_ques = (c == '?'); 1877 if (vc->vc_ques) 1878 return; 1879 case ESgetpars: 1880 if (c == ';' && vc->vc_npar < NPAR - 1) { 1881 vc->vc_npar++; 1882 return; 1883 } else if (c>='0' && c<='9') { 1884 vc->vc_par[vc->vc_npar] *= 10; 1885 vc->vc_par[vc->vc_npar] += c - '0'; 1886 return; 1887 } 1888 vc->vc_state = ESnormal; 1889 switch(c) { 1890 case 'h': 1891 set_mode(vc, 1); 1892 return; 1893 case 'l': 1894 set_mode(vc, 0); 1895 return; 1896 case 'c': 1897 if (vc->vc_ques) { 1898 if (vc->vc_par[0]) 1899 vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16); 1900 else 1901 vc->vc_cursor_type = cur_default; 1902 return; 1903 } 1904 break; 1905 case 'm': 1906 if (vc->vc_ques) { 1907 clear_selection(); 1908 if (vc->vc_par[0]) 1909 vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1]; 1910 else 1911 vc->vc_complement_mask = vc->vc_s_complement_mask; 1912 return; 1913 } 1914 break; 1915 case 'n': 1916 if (!vc->vc_ques) { 1917 if (vc->vc_par[0] == 5) 1918 status_report(tty); 1919 else if (vc->vc_par[0] == 6) 1920 cursor_report(vc, tty); 1921 } 1922 return; 1923 } 1924 if (vc->vc_ques) { 1925 vc->vc_ques = 0; 1926 return; 1927 } 1928 switch(c) { 1929 case 'G': case '`': 1930 if (vc->vc_par[0]) 1931 vc->vc_par[0]--; 1932 gotoxy(vc, vc->vc_par[0], vc->vc_y); 1933 return; 1934 case 'A': 1935 if (!vc->vc_par[0]) 1936 vc->vc_par[0]++; 1937 gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]); 1938 return; 1939 case 'B': case 'e': 1940 if (!vc->vc_par[0]) 1941 vc->vc_par[0]++; 1942 gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]); 1943 return; 1944 case 'C': case 'a': 1945 if (!vc->vc_par[0]) 1946 vc->vc_par[0]++; 1947 gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y); 1948 return; 1949 case 'D': 1950 if (!vc->vc_par[0]) 1951 vc->vc_par[0]++; 1952 gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y); 1953 return; 1954 case 'E': 1955 if (!vc->vc_par[0]) 1956 vc->vc_par[0]++; 1957 gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]); 1958 return; 1959 case 'F': 1960 if (!vc->vc_par[0]) 1961 vc->vc_par[0]++; 1962 gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]); 1963 return; 1964 case 'd': 1965 if (vc->vc_par[0]) 1966 vc->vc_par[0]--; 1967 gotoxay(vc, vc->vc_x ,vc->vc_par[0]); 1968 return; 1969 case 'H': case 'f': 1970 if (vc->vc_par[0]) 1971 vc->vc_par[0]--; 1972 if (vc->vc_par[1]) 1973 vc->vc_par[1]--; 1974 gotoxay(vc, vc->vc_par[1], vc->vc_par[0]); 1975 return; 1976 case 'J': 1977 csi_J(vc, vc->vc_par[0]); 1978 return; 1979 case 'K': 1980 csi_K(vc, vc->vc_par[0]); 1981 return; 1982 case 'L': 1983 csi_L(vc, vc->vc_par[0]); 1984 return; 1985 case 'M': 1986 csi_M(vc, vc->vc_par[0]); 1987 return; 1988 case 'P': 1989 csi_P(vc, vc->vc_par[0]); 1990 return; 1991 case 'c': 1992 if (!vc->vc_par[0]) 1993 respond_ID(tty); 1994 return; 1995 case 'g': 1996 if (!vc->vc_par[0]) 1997 vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31)); 1998 else if (vc->vc_par[0] == 3) { 1999 vc->vc_tab_stop[0] = 2000 vc->vc_tab_stop[1] = 2001 vc->vc_tab_stop[2] = 2002 vc->vc_tab_stop[3] = 2003 vc->vc_tab_stop[4] = 2004 vc->vc_tab_stop[5] = 2005 vc->vc_tab_stop[6] = 2006 vc->vc_tab_stop[7] = 0; 2007 } 2008 return; 2009 case 'm': 2010 csi_m(vc); 2011 return; 2012 case 'q': /* DECLL - but only 3 leds */ 2013 /* map 0,1,2,3 to 0,1,2,4 */ 2014 if (vc->vc_par[0] < 4) 2015 vt_set_led_state(vc->vc_num, 2016 (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4); 2017 return; 2018 case 'r': 2019 if (!vc->vc_par[0]) 2020 vc->vc_par[0]++; 2021 if (!vc->vc_par[1]) 2022 vc->vc_par[1] = vc->vc_rows; 2023 /* Minimum allowed region is 2 lines */ 2024 if (vc->vc_par[0] < vc->vc_par[1] && 2025 vc->vc_par[1] <= vc->vc_rows) { 2026 vc->vc_top = vc->vc_par[0] - 1; 2027 vc->vc_bottom = vc->vc_par[1]; 2028 gotoxay(vc, 0, 0); 2029 } 2030 return; 2031 case 's': 2032 save_cur(vc); 2033 return; 2034 case 'u': 2035 restore_cur(vc); 2036 return; 2037 case 'X': 2038 csi_X(vc, vc->vc_par[0]); 2039 return; 2040 case '@': 2041 csi_at(vc, vc->vc_par[0]); 2042 return; 2043 case ']': /* setterm functions */ 2044 setterm_command(vc); 2045 return; 2046 } 2047 return; 2048 case ESpercent: 2049 vc->vc_state = ESnormal; 2050 switch (c) { 2051 case '@': /* defined in ISO 2022 */ 2052 vc->vc_utf = 0; 2053 return; 2054 case 'G': /* prelim official escape code */ 2055 case '8': /* retained for compatibility */ 2056 vc->vc_utf = 1; 2057 return; 2058 } 2059 return; 2060 case ESfunckey: 2061 vc->vc_state = ESnormal; 2062 return; 2063 case EShash: 2064 vc->vc_state = ESnormal; 2065 if (c == '8') { 2066 /* DEC screen alignment test. kludge :-) */ 2067 vc->vc_video_erase_char = 2068 (vc->vc_video_erase_char & 0xff00) | 'E'; 2069 csi_J(vc, 2); 2070 vc->vc_video_erase_char = 2071 (vc->vc_video_erase_char & 0xff00) | ' '; 2072 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2); 2073 } 2074 return; 2075 case ESsetG0: 2076 if (c == '0') 2077 vc->vc_G0_charset = GRAF_MAP; 2078 else if (c == 'B') 2079 vc->vc_G0_charset = LAT1_MAP; 2080 else if (c == 'U') 2081 vc->vc_G0_charset = IBMPC_MAP; 2082 else if (c == 'K') 2083 vc->vc_G0_charset = USER_MAP; 2084 if (vc->vc_charset == 0) 2085 vc->vc_translate = set_translate(vc->vc_G0_charset, vc); 2086 vc->vc_state = ESnormal; 2087 return; 2088 case ESsetG1: 2089 if (c == '0') 2090 vc->vc_G1_charset = GRAF_MAP; 2091 else if (c == 'B') 2092 vc->vc_G1_charset = LAT1_MAP; 2093 else if (c == 'U') 2094 vc->vc_G1_charset = IBMPC_MAP; 2095 else if (c == 'K') 2096 vc->vc_G1_charset = USER_MAP; 2097 if (vc->vc_charset == 1) 2098 vc->vc_translate = set_translate(vc->vc_G1_charset, vc); 2099 vc->vc_state = ESnormal; 2100 return; 2101 case ESosc: 2102 return; 2103 default: 2104 vc->vc_state = ESnormal; 2105 } 2106 } 2107 2108 /* is_double_width() is based on the wcwidth() implementation by 2109 * Markus Kuhn -- 2007-05-26 (Unicode 5.0) 2110 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c 2111 */ 2112 struct interval { 2113 uint32_t first; 2114 uint32_t last; 2115 }; 2116 2117 static int bisearch(uint32_t ucs, const struct interval *table, int max) 2118 { 2119 int min = 0; 2120 int mid; 2121 2122 if (ucs < table[0].first || ucs > table[max].last) 2123 return 0; 2124 while (max >= min) { 2125 mid = (min + max) / 2; 2126 if (ucs > table[mid].last) 2127 min = mid + 1; 2128 else if (ucs < table[mid].first) 2129 max = mid - 1; 2130 else 2131 return 1; 2132 } 2133 return 0; 2134 } 2135 2136 static int is_double_width(uint32_t ucs) 2137 { 2138 static const struct interval double_width[] = { 2139 { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E }, 2140 { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF }, 2141 { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 }, 2142 { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD } 2143 }; 2144 return bisearch(ucs, double_width, ARRAY_SIZE(double_width) - 1); 2145 } 2146 2147 /* acquires console_lock */ 2148 static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count) 2149 { 2150 #ifdef VT_BUF_VRAM_ONLY 2151 #define FLUSH do { } while(0); 2152 #else 2153 #define FLUSH if (draw_x >= 0) { \ 2154 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \ 2155 draw_x = -1; \ 2156 } 2157 #endif 2158 2159 int c, tc, ok, n = 0, draw_x = -1; 2160 unsigned int currcons; 2161 unsigned long draw_from = 0, draw_to = 0; 2162 struct vc_data *vc; 2163 unsigned char vc_attr; 2164 struct vt_notifier_param param; 2165 uint8_t rescan; 2166 uint8_t inverse; 2167 uint8_t width; 2168 u16 himask, charmask; 2169 2170 if (in_interrupt()) 2171 return count; 2172 2173 might_sleep(); 2174 2175 console_lock(); 2176 vc = tty->driver_data; 2177 if (vc == NULL) { 2178 printk(KERN_ERR "vt: argh, driver_data is NULL !\n"); 2179 console_unlock(); 2180 return 0; 2181 } 2182 2183 currcons = vc->vc_num; 2184 if (!vc_cons_allocated(currcons)) { 2185 /* could this happen? */ 2186 pr_warn_once("con_write: tty %d not allocated\n", currcons+1); 2187 console_unlock(); 2188 return 0; 2189 } 2190 2191 himask = vc->vc_hi_font_mask; 2192 charmask = himask ? 0x1ff : 0xff; 2193 2194 /* undraw cursor first */ 2195 if (IS_FG(vc)) 2196 hide_cursor(vc); 2197 2198 param.vc = vc; 2199 2200 while (!tty->stopped && count) { 2201 int orig = *buf; 2202 c = orig; 2203 buf++; 2204 n++; 2205 count--; 2206 rescan = 0; 2207 inverse = 0; 2208 width = 1; 2209 2210 /* Do no translation at all in control states */ 2211 if (vc->vc_state != ESnormal) { 2212 tc = c; 2213 } else if (vc->vc_utf && !vc->vc_disp_ctrl) { 2214 /* Combine UTF-8 into Unicode in vc_utf_char. 2215 * vc_utf_count is the number of continuation bytes still 2216 * expected to arrive. 2217 * vc_npar is the number of continuation bytes arrived so 2218 * far 2219 */ 2220 rescan_last_byte: 2221 if ((c & 0xc0) == 0x80) { 2222 /* Continuation byte received */ 2223 static const uint32_t utf8_length_changes[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff }; 2224 if (vc->vc_utf_count) { 2225 vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f); 2226 vc->vc_npar++; 2227 if (--vc->vc_utf_count) { 2228 /* Still need some bytes */ 2229 continue; 2230 } 2231 /* Got a whole character */ 2232 c = vc->vc_utf_char; 2233 /* Reject overlong sequences */ 2234 if (c <= utf8_length_changes[vc->vc_npar - 1] || 2235 c > utf8_length_changes[vc->vc_npar]) 2236 c = 0xfffd; 2237 } else { 2238 /* Unexpected continuation byte */ 2239 vc->vc_utf_count = 0; 2240 c = 0xfffd; 2241 } 2242 } else { 2243 /* Single ASCII byte or first byte of a sequence received */ 2244 if (vc->vc_utf_count) { 2245 /* Continuation byte expected */ 2246 rescan = 1; 2247 vc->vc_utf_count = 0; 2248 c = 0xfffd; 2249 } else if (c > 0x7f) { 2250 /* First byte of a multibyte sequence received */ 2251 vc->vc_npar = 0; 2252 if ((c & 0xe0) == 0xc0) { 2253 vc->vc_utf_count = 1; 2254 vc->vc_utf_char = (c & 0x1f); 2255 } else if ((c & 0xf0) == 0xe0) { 2256 vc->vc_utf_count = 2; 2257 vc->vc_utf_char = (c & 0x0f); 2258 } else if ((c & 0xf8) == 0xf0) { 2259 vc->vc_utf_count = 3; 2260 vc->vc_utf_char = (c & 0x07); 2261 } else if ((c & 0xfc) == 0xf8) { 2262 vc->vc_utf_count = 4; 2263 vc->vc_utf_char = (c & 0x03); 2264 } else if ((c & 0xfe) == 0xfc) { 2265 vc->vc_utf_count = 5; 2266 vc->vc_utf_char = (c & 0x01); 2267 } else { 2268 /* 254 and 255 are invalid */ 2269 c = 0xfffd; 2270 } 2271 if (vc->vc_utf_count) { 2272 /* Still need some bytes */ 2273 continue; 2274 } 2275 } 2276 /* Nothing to do if an ASCII byte was received */ 2277 } 2278 /* End of UTF-8 decoding. */ 2279 /* c is the received character, or U+FFFD for invalid sequences. */ 2280 /* Replace invalid Unicode code points with U+FFFD too */ 2281 if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff) 2282 c = 0xfffd; 2283 tc = c; 2284 } else { /* no utf or alternate charset mode */ 2285 tc = vc_translate(vc, c); 2286 } 2287 2288 param.c = tc; 2289 if (atomic_notifier_call_chain(&vt_notifier_list, VT_PREWRITE, 2290 ¶m) == NOTIFY_STOP) 2291 continue; 2292 2293 /* If the original code was a control character we 2294 * only allow a glyph to be displayed if the code is 2295 * not normally used (such as for cursor movement) or 2296 * if the disp_ctrl mode has been explicitly enabled. 2297 * Certain characters (as given by the CTRL_ALWAYS 2298 * bitmap) are always displayed as control characters, 2299 * as the console would be pretty useless without 2300 * them; to display an arbitrary font position use the 2301 * direct-to-font zone in UTF-8 mode. 2302 */ 2303 ok = tc && (c >= 32 || 2304 !(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 : 2305 vc->vc_utf || ((CTRL_ACTION >> c) & 1))) 2306 && (c != 127 || vc->vc_disp_ctrl) 2307 && (c != 128+27); 2308 2309 if (vc->vc_state == ESnormal && ok) { 2310 if (vc->vc_utf && !vc->vc_disp_ctrl) { 2311 if (is_double_width(c)) 2312 width = 2; 2313 } 2314 /* Now try to find out how to display it */ 2315 tc = conv_uni_to_pc(vc, tc); 2316 if (tc & ~charmask) { 2317 if (tc == -1 || tc == -2) { 2318 continue; /* nothing to display */ 2319 } 2320 /* Glyph not found */ 2321 if ((!(vc->vc_utf && !vc->vc_disp_ctrl) || c < 128) && !(c & ~charmask)) { 2322 /* In legacy mode use the glyph we get by a 1:1 mapping. 2323 This would make absolutely no sense with Unicode in mind, 2324 but do this for ASCII characters since a font may lack 2325 Unicode mapping info and we don't want to end up with 2326 having question marks only. */ 2327 tc = c; 2328 } else { 2329 /* Display U+FFFD. If it's not found, display an inverse question mark. */ 2330 tc = conv_uni_to_pc(vc, 0xfffd); 2331 if (tc < 0) { 2332 inverse = 1; 2333 tc = conv_uni_to_pc(vc, '?'); 2334 if (tc < 0) tc = '?'; 2335 } 2336 } 2337 } 2338 2339 if (!inverse) { 2340 vc_attr = vc->vc_attr; 2341 } else { 2342 /* invert vc_attr */ 2343 if (!vc->vc_can_do_color) { 2344 vc_attr = (vc->vc_attr) ^ 0x08; 2345 } else if (vc->vc_hi_font_mask == 0x100) { 2346 vc_attr = ((vc->vc_attr) & 0x11) | (((vc->vc_attr) & 0xe0) >> 4) | (((vc->vc_attr) & 0x0e) << 4); 2347 } else { 2348 vc_attr = ((vc->vc_attr) & 0x88) | (((vc->vc_attr) & 0x70) >> 4) | (((vc->vc_attr) & 0x07) << 4); 2349 } 2350 FLUSH 2351 } 2352 2353 while (1) { 2354 if (vc->vc_need_wrap || vc->vc_decim) 2355 FLUSH 2356 if (vc->vc_need_wrap) { 2357 cr(vc); 2358 lf(vc); 2359 } 2360 if (vc->vc_decim) 2361 insert_char(vc, 1); 2362 scr_writew(himask ? 2363 ((vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) : 2364 (vc_attr << 8) + tc, 2365 (u16 *) vc->vc_pos); 2366 if (DO_UPDATE(vc) && draw_x < 0) { 2367 draw_x = vc->vc_x; 2368 draw_from = vc->vc_pos; 2369 } 2370 if (vc->vc_x == vc->vc_cols - 1) { 2371 vc->vc_need_wrap = vc->vc_decawm; 2372 draw_to = vc->vc_pos + 2; 2373 } else { 2374 vc->vc_x++; 2375 draw_to = (vc->vc_pos += 2); 2376 } 2377 2378 if (!--width) break; 2379 2380 tc = conv_uni_to_pc(vc, ' '); /* A space is printed in the second column */ 2381 if (tc < 0) tc = ' '; 2382 } 2383 notify_write(vc, c); 2384 2385 if (inverse) { 2386 FLUSH 2387 } 2388 2389 if (rescan) { 2390 rescan = 0; 2391 inverse = 0; 2392 width = 1; 2393 c = orig; 2394 goto rescan_last_byte; 2395 } 2396 continue; 2397 } 2398 FLUSH 2399 do_con_trol(tty, vc, orig); 2400 } 2401 FLUSH 2402 console_conditional_schedule(); 2403 console_unlock(); 2404 notify_update(vc); 2405 return n; 2406 #undef FLUSH 2407 } 2408 2409 /* 2410 * This is the console switching callback. 2411 * 2412 * Doing console switching in a process context allows 2413 * us to do the switches asynchronously (needed when we want 2414 * to switch due to a keyboard interrupt). Synchronization 2415 * with other console code and prevention of re-entrancy is 2416 * ensured with console_lock. 2417 */ 2418 static void console_callback(struct work_struct *ignored) 2419 { 2420 console_lock(); 2421 2422 if (want_console >= 0) { 2423 if (want_console != fg_console && 2424 vc_cons_allocated(want_console)) { 2425 hide_cursor(vc_cons[fg_console].d); 2426 change_console(vc_cons[want_console].d); 2427 /* we only changed when the console had already 2428 been allocated - a new console is not created 2429 in an interrupt routine */ 2430 } 2431 want_console = -1; 2432 } 2433 if (do_poke_blanked_console) { /* do not unblank for a LED change */ 2434 do_poke_blanked_console = 0; 2435 poke_blanked_console(); 2436 } 2437 if (scrollback_delta) { 2438 struct vc_data *vc = vc_cons[fg_console].d; 2439 clear_selection(); 2440 if (vc->vc_mode == KD_TEXT) 2441 vc->vc_sw->con_scrolldelta(vc, scrollback_delta); 2442 scrollback_delta = 0; 2443 } 2444 if (blank_timer_expired) { 2445 do_blank_screen(0); 2446 blank_timer_expired = 0; 2447 } 2448 notify_update(vc_cons[fg_console].d); 2449 2450 console_unlock(); 2451 } 2452 2453 int set_console(int nr) 2454 { 2455 struct vc_data *vc = vc_cons[fg_console].d; 2456 2457 if (!vc_cons_allocated(nr) || vt_dont_switch || 2458 (vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) { 2459 2460 /* 2461 * Console switch will fail in console_callback() or 2462 * change_console() so there is no point scheduling 2463 * the callback 2464 * 2465 * Existing set_console() users don't check the return 2466 * value so this shouldn't break anything 2467 */ 2468 return -EINVAL; 2469 } 2470 2471 want_console = nr; 2472 schedule_console_callback(); 2473 2474 return 0; 2475 } 2476 2477 struct tty_driver *console_driver; 2478 2479 #ifdef CONFIG_VT_CONSOLE 2480 2481 /** 2482 * vt_kmsg_redirect() - Sets/gets the kernel message console 2483 * @new: The new virtual terminal number or -1 if the console should stay 2484 * unchanged 2485 * 2486 * By default, the kernel messages are always printed on the current virtual 2487 * console. However, the user may modify that default with the 2488 * TIOCL_SETKMSGREDIRECT ioctl call. 2489 * 2490 * This function sets the kernel message console to be @new. It returns the old 2491 * virtual console number. The virtual terminal number 0 (both as parameter and 2492 * return value) means no redirection (i.e. always printed on the currently 2493 * active console). 2494 * 2495 * The parameter -1 means that only the current console is returned, but the 2496 * value is not modified. You may use the macro vt_get_kmsg_redirect() in that 2497 * case to make the code more understandable. 2498 * 2499 * When the kernel is compiled without CONFIG_VT_CONSOLE, this function ignores 2500 * the parameter and always returns 0. 2501 */ 2502 int vt_kmsg_redirect(int new) 2503 { 2504 static int kmsg_con; 2505 2506 if (new != -1) 2507 return xchg(&kmsg_con, new); 2508 else 2509 return kmsg_con; 2510 } 2511 2512 /* 2513 * Console on virtual terminal 2514 * 2515 * The console must be locked when we get here. 2516 */ 2517 2518 static void vt_console_print(struct console *co, const char *b, unsigned count) 2519 { 2520 struct vc_data *vc = vc_cons[fg_console].d; 2521 unsigned char c; 2522 static DEFINE_SPINLOCK(printing_lock); 2523 const ushort *start; 2524 ushort cnt = 0; 2525 ushort myx; 2526 int kmsg_console; 2527 2528 /* console busy or not yet initialized */ 2529 if (!printable) 2530 return; 2531 if (!spin_trylock(&printing_lock)) 2532 return; 2533 2534 kmsg_console = vt_get_kmsg_redirect(); 2535 if (kmsg_console && vc_cons_allocated(kmsg_console - 1)) 2536 vc = vc_cons[kmsg_console - 1].d; 2537 2538 /* read `x' only after setting currcons properly (otherwise 2539 the `x' macro will read the x of the foreground console). */ 2540 myx = vc->vc_x; 2541 2542 if (!vc_cons_allocated(fg_console)) { 2543 /* impossible */ 2544 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */ 2545 goto quit; 2546 } 2547 2548 if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc)) 2549 goto quit; 2550 2551 /* undraw cursor first */ 2552 if (IS_FG(vc)) 2553 hide_cursor(vc); 2554 2555 start = (ushort *)vc->vc_pos; 2556 2557 /* Contrived structure to try to emulate original need_wrap behaviour 2558 * Problems caused when we have need_wrap set on '\n' character */ 2559 while (count--) { 2560 c = *b++; 2561 if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) { 2562 if (cnt > 0) { 2563 if (CON_IS_VISIBLE(vc)) 2564 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x); 2565 vc->vc_x += cnt; 2566 if (vc->vc_need_wrap) 2567 vc->vc_x--; 2568 cnt = 0; 2569 } 2570 if (c == 8) { /* backspace */ 2571 bs(vc); 2572 start = (ushort *)vc->vc_pos; 2573 myx = vc->vc_x; 2574 continue; 2575 } 2576 if (c != 13) 2577 lf(vc); 2578 cr(vc); 2579 start = (ushort *)vc->vc_pos; 2580 myx = vc->vc_x; 2581 if (c == 10 || c == 13) 2582 continue; 2583 } 2584 scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos); 2585 notify_write(vc, c); 2586 cnt++; 2587 if (myx == vc->vc_cols - 1) { 2588 vc->vc_need_wrap = 1; 2589 continue; 2590 } 2591 vc->vc_pos += 2; 2592 myx++; 2593 } 2594 if (cnt > 0) { 2595 if (CON_IS_VISIBLE(vc)) 2596 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x); 2597 vc->vc_x += cnt; 2598 if (vc->vc_x == vc->vc_cols) { 2599 vc->vc_x--; 2600 vc->vc_need_wrap = 1; 2601 } 2602 } 2603 set_cursor(vc); 2604 notify_update(vc); 2605 2606 quit: 2607 spin_unlock(&printing_lock); 2608 } 2609 2610 static struct tty_driver *vt_console_device(struct console *c, int *index) 2611 { 2612 *index = c->index ? c->index-1 : fg_console; 2613 return console_driver; 2614 } 2615 2616 static struct console vt_console_driver = { 2617 .name = "tty", 2618 .write = vt_console_print, 2619 .device = vt_console_device, 2620 .unblank = unblank_screen, 2621 .flags = CON_PRINTBUFFER, 2622 .index = -1, 2623 }; 2624 #endif 2625 2626 /* 2627 * Handling of Linux-specific VC ioctls 2628 */ 2629 2630 /* 2631 * Generally a bit racy with respect to console_lock();. 2632 * 2633 * There are some functions which don't need it. 2634 * 2635 * There are some functions which can sleep for arbitrary periods 2636 * (paste_selection) but we don't need the lock there anyway. 2637 * 2638 * set_selection has locking, and definitely needs it 2639 */ 2640 2641 int tioclinux(struct tty_struct *tty, unsigned long arg) 2642 { 2643 char type, data; 2644 char __user *p = (char __user *)arg; 2645 int lines; 2646 int ret; 2647 2648 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN)) 2649 return -EPERM; 2650 if (get_user(type, p)) 2651 return -EFAULT; 2652 ret = 0; 2653 2654 switch (type) 2655 { 2656 case TIOCL_SETSEL: 2657 console_lock(); 2658 ret = set_selection((struct tiocl_selection __user *)(p+1), tty); 2659 console_unlock(); 2660 break; 2661 case TIOCL_PASTESEL: 2662 ret = paste_selection(tty); 2663 break; 2664 case TIOCL_UNBLANKSCREEN: 2665 console_lock(); 2666 unblank_screen(); 2667 console_unlock(); 2668 break; 2669 case TIOCL_SELLOADLUT: 2670 console_lock(); 2671 ret = sel_loadlut(p); 2672 console_unlock(); 2673 break; 2674 case TIOCL_GETSHIFTSTATE: 2675 2676 /* 2677 * Make it possible to react to Shift+Mousebutton. 2678 * Note that 'shift_state' is an undocumented 2679 * kernel-internal variable; programs not closely 2680 * related to the kernel should not use this. 2681 */ 2682 data = vt_get_shift_state(); 2683 ret = __put_user(data, p); 2684 break; 2685 case TIOCL_GETMOUSEREPORTING: 2686 console_lock(); /* May be overkill */ 2687 data = mouse_reporting(); 2688 console_unlock(); 2689 ret = __put_user(data, p); 2690 break; 2691 case TIOCL_SETVESABLANK: 2692 console_lock(); 2693 ret = set_vesa_blanking(p); 2694 console_unlock(); 2695 break; 2696 case TIOCL_GETKMSGREDIRECT: 2697 data = vt_get_kmsg_redirect(); 2698 ret = __put_user(data, p); 2699 break; 2700 case TIOCL_SETKMSGREDIRECT: 2701 if (!capable(CAP_SYS_ADMIN)) { 2702 ret = -EPERM; 2703 } else { 2704 if (get_user(data, p+1)) 2705 ret = -EFAULT; 2706 else 2707 vt_kmsg_redirect(data); 2708 } 2709 break; 2710 case TIOCL_GETFGCONSOLE: 2711 /* No locking needed as this is a transiently 2712 correct return anyway if the caller hasn't 2713 disabled switching */ 2714 ret = fg_console; 2715 break; 2716 case TIOCL_SCROLLCONSOLE: 2717 if (get_user(lines, (s32 __user *)(p+4))) { 2718 ret = -EFAULT; 2719 } else { 2720 /* Need the console lock here. Note that lots 2721 of other calls need fixing before the lock 2722 is actually useful ! */ 2723 console_lock(); 2724 scrollfront(vc_cons[fg_console].d, lines); 2725 console_unlock(); 2726 ret = 0; 2727 } 2728 break; 2729 case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */ 2730 console_lock(); 2731 ignore_poke = 1; 2732 do_blank_screen(0); 2733 console_unlock(); 2734 break; 2735 case TIOCL_BLANKEDSCREEN: 2736 ret = console_blanked; 2737 break; 2738 default: 2739 ret = -EINVAL; 2740 break; 2741 } 2742 return ret; 2743 } 2744 2745 /* 2746 * /dev/ttyN handling 2747 */ 2748 2749 static int con_write(struct tty_struct *tty, const unsigned char *buf, int count) 2750 { 2751 int retval; 2752 2753 retval = do_con_write(tty, buf, count); 2754 con_flush_chars(tty); 2755 2756 return retval; 2757 } 2758 2759 static int con_put_char(struct tty_struct *tty, unsigned char ch) 2760 { 2761 if (in_interrupt()) 2762 return 0; /* n_r3964 calls put_char() from interrupt context */ 2763 return do_con_write(tty, &ch, 1); 2764 } 2765 2766 static int con_write_room(struct tty_struct *tty) 2767 { 2768 if (tty->stopped) 2769 return 0; 2770 return 32768; /* No limit, really; we're not buffering */ 2771 } 2772 2773 static int con_chars_in_buffer(struct tty_struct *tty) 2774 { 2775 return 0; /* we're not buffering */ 2776 } 2777 2778 /* 2779 * con_throttle and con_unthrottle are only used for 2780 * paste_selection(), which has to stuff in a large number of 2781 * characters... 2782 */ 2783 static void con_throttle(struct tty_struct *tty) 2784 { 2785 } 2786 2787 static void con_unthrottle(struct tty_struct *tty) 2788 { 2789 struct vc_data *vc = tty->driver_data; 2790 2791 wake_up_interruptible(&vc->paste_wait); 2792 } 2793 2794 /* 2795 * Turn the Scroll-Lock LED on when the tty is stopped 2796 */ 2797 static void con_stop(struct tty_struct *tty) 2798 { 2799 int console_num; 2800 if (!tty) 2801 return; 2802 console_num = tty->index; 2803 if (!vc_cons_allocated(console_num)) 2804 return; 2805 vt_kbd_con_stop(console_num); 2806 } 2807 2808 /* 2809 * Turn the Scroll-Lock LED off when the console is started 2810 */ 2811 static void con_start(struct tty_struct *tty) 2812 { 2813 int console_num; 2814 if (!tty) 2815 return; 2816 console_num = tty->index; 2817 if (!vc_cons_allocated(console_num)) 2818 return; 2819 vt_kbd_con_start(console_num); 2820 } 2821 2822 static void con_flush_chars(struct tty_struct *tty) 2823 { 2824 struct vc_data *vc; 2825 2826 if (in_interrupt()) /* from flush_to_ldisc */ 2827 return; 2828 2829 /* if we race with con_close(), vt may be null */ 2830 console_lock(); 2831 vc = tty->driver_data; 2832 if (vc) 2833 set_cursor(vc); 2834 console_unlock(); 2835 } 2836 2837 /* 2838 * Allocate the console screen memory. 2839 */ 2840 static int con_install(struct tty_driver *driver, struct tty_struct *tty) 2841 { 2842 unsigned int currcons = tty->index; 2843 struct vc_data *vc; 2844 int ret; 2845 2846 console_lock(); 2847 ret = vc_allocate(currcons); 2848 if (ret) 2849 goto unlock; 2850 2851 vc = vc_cons[currcons].d; 2852 2853 /* Still being freed */ 2854 if (vc->port.tty) { 2855 ret = -ERESTARTSYS; 2856 goto unlock; 2857 } 2858 2859 ret = tty_port_install(&vc->port, driver, tty); 2860 if (ret) 2861 goto unlock; 2862 2863 tty->driver_data = vc; 2864 vc->port.tty = tty; 2865 2866 if (!tty->winsize.ws_row && !tty->winsize.ws_col) { 2867 tty->winsize.ws_row = vc_cons[currcons].d->vc_rows; 2868 tty->winsize.ws_col = vc_cons[currcons].d->vc_cols; 2869 } 2870 if (vc->vc_utf) 2871 tty->termios.c_iflag |= IUTF8; 2872 else 2873 tty->termios.c_iflag &= ~IUTF8; 2874 unlock: 2875 console_unlock(); 2876 return ret; 2877 } 2878 2879 static int con_open(struct tty_struct *tty, struct file *filp) 2880 { 2881 /* everything done in install */ 2882 return 0; 2883 } 2884 2885 2886 static void con_close(struct tty_struct *tty, struct file *filp) 2887 { 2888 /* Nothing to do - we defer to shutdown */ 2889 } 2890 2891 static void con_shutdown(struct tty_struct *tty) 2892 { 2893 struct vc_data *vc = tty->driver_data; 2894 BUG_ON(vc == NULL); 2895 console_lock(); 2896 vc->port.tty = NULL; 2897 console_unlock(); 2898 } 2899 2900 static int default_color = 7; /* white */ 2901 static int default_italic_color = 2; // green (ASCII) 2902 static int default_underline_color = 3; // cyan (ASCII) 2903 module_param_named(color, default_color, int, S_IRUGO | S_IWUSR); 2904 module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR); 2905 module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR); 2906 2907 static void vc_init(struct vc_data *vc, unsigned int rows, 2908 unsigned int cols, int do_clear) 2909 { 2910 int j, k ; 2911 2912 vc->vc_cols = cols; 2913 vc->vc_rows = rows; 2914 vc->vc_size_row = cols << 1; 2915 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row; 2916 2917 set_origin(vc); 2918 vc->vc_pos = vc->vc_origin; 2919 reset_vc(vc); 2920 for (j=k=0; j<16; j++) { 2921 vc->vc_palette[k++] = default_red[j] ; 2922 vc->vc_palette[k++] = default_grn[j] ; 2923 vc->vc_palette[k++] = default_blu[j] ; 2924 } 2925 vc->vc_def_color = default_color; 2926 vc->vc_ulcolor = default_underline_color; 2927 vc->vc_itcolor = default_italic_color; 2928 vc->vc_halfcolor = 0x08; /* grey */ 2929 init_waitqueue_head(&vc->paste_wait); 2930 reset_terminal(vc, do_clear); 2931 } 2932 2933 /* 2934 * This routine initializes console interrupts, and does nothing 2935 * else. If you want the screen to clear, call tty_write with 2936 * the appropriate escape-sequence. 2937 */ 2938 2939 static int __init con_init(void) 2940 { 2941 const char *display_desc = NULL; 2942 struct vc_data *vc; 2943 unsigned int currcons = 0, i; 2944 2945 console_lock(); 2946 2947 if (conswitchp) 2948 display_desc = conswitchp->con_startup(); 2949 if (!display_desc) { 2950 fg_console = 0; 2951 console_unlock(); 2952 return 0; 2953 } 2954 2955 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 2956 struct con_driver *con_driver = ®istered_con_driver[i]; 2957 2958 if (con_driver->con == NULL) { 2959 con_driver->con = conswitchp; 2960 con_driver->desc = display_desc; 2961 con_driver->flag = CON_DRIVER_FLAG_INIT; 2962 con_driver->first = 0; 2963 con_driver->last = MAX_NR_CONSOLES - 1; 2964 break; 2965 } 2966 } 2967 2968 for (i = 0; i < MAX_NR_CONSOLES; i++) 2969 con_driver_map[i] = conswitchp; 2970 2971 if (blankinterval) { 2972 blank_state = blank_normal_wait; 2973 mod_timer(&console_timer, jiffies + (blankinterval * HZ)); 2974 } 2975 2976 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) { 2977 vc_cons[currcons].d = vc = kzalloc(sizeof(struct vc_data), GFP_NOWAIT); 2978 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK); 2979 tty_port_init(&vc->port); 2980 visual_init(vc, currcons, 1); 2981 vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_NOWAIT); 2982 vc_init(vc, vc->vc_rows, vc->vc_cols, 2983 currcons || !vc->vc_sw->con_save_screen); 2984 } 2985 currcons = fg_console = 0; 2986 master_display_fg = vc = vc_cons[currcons].d; 2987 set_origin(vc); 2988 save_screen(vc); 2989 gotoxy(vc, vc->vc_x, vc->vc_y); 2990 csi_J(vc, 0); 2991 update_screen(vc); 2992 pr_info("Console: %s %s %dx%d\n", 2993 vc->vc_can_do_color ? "colour" : "mono", 2994 display_desc, vc->vc_cols, vc->vc_rows); 2995 printable = 1; 2996 2997 console_unlock(); 2998 2999 #ifdef CONFIG_VT_CONSOLE 3000 register_console(&vt_console_driver); 3001 #endif 3002 return 0; 3003 } 3004 console_initcall(con_init); 3005 3006 static const struct tty_operations con_ops = { 3007 .install = con_install, 3008 .open = con_open, 3009 .close = con_close, 3010 .write = con_write, 3011 .write_room = con_write_room, 3012 .put_char = con_put_char, 3013 .flush_chars = con_flush_chars, 3014 .chars_in_buffer = con_chars_in_buffer, 3015 .ioctl = vt_ioctl, 3016 #ifdef CONFIG_COMPAT 3017 .compat_ioctl = vt_compat_ioctl, 3018 #endif 3019 .stop = con_stop, 3020 .start = con_start, 3021 .throttle = con_throttle, 3022 .unthrottle = con_unthrottle, 3023 .resize = vt_resize, 3024 .shutdown = con_shutdown 3025 }; 3026 3027 static struct cdev vc0_cdev; 3028 3029 static ssize_t show_tty_active(struct device *dev, 3030 struct device_attribute *attr, char *buf) 3031 { 3032 return sprintf(buf, "tty%d\n", fg_console + 1); 3033 } 3034 static DEVICE_ATTR(active, S_IRUGO, show_tty_active, NULL); 3035 3036 int __init vty_init(const struct file_operations *console_fops) 3037 { 3038 cdev_init(&vc0_cdev, console_fops); 3039 if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) || 3040 register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0) 3041 panic("Couldn't register /dev/tty0 driver\n"); 3042 tty0dev = device_create(tty_class, NULL, MKDEV(TTY_MAJOR, 0), NULL, "tty0"); 3043 if (IS_ERR(tty0dev)) 3044 tty0dev = NULL; 3045 else 3046 WARN_ON(device_create_file(tty0dev, &dev_attr_active) < 0); 3047 3048 vcs_init(); 3049 3050 console_driver = alloc_tty_driver(MAX_NR_CONSOLES); 3051 if (!console_driver) 3052 panic("Couldn't allocate console driver\n"); 3053 3054 console_driver->name = "tty"; 3055 console_driver->name_base = 1; 3056 console_driver->major = TTY_MAJOR; 3057 console_driver->minor_start = 1; 3058 console_driver->type = TTY_DRIVER_TYPE_CONSOLE; 3059 console_driver->init_termios = tty_std_termios; 3060 if (default_utf8) 3061 console_driver->init_termios.c_iflag |= IUTF8; 3062 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS; 3063 tty_set_operations(console_driver, &con_ops); 3064 if (tty_register_driver(console_driver)) 3065 panic("Couldn't register console driver\n"); 3066 kbd_init(); 3067 console_map_init(); 3068 #ifdef CONFIG_MDA_CONSOLE 3069 mda_console_init(); 3070 #endif 3071 return 0; 3072 } 3073 3074 #ifndef VT_SINGLE_DRIVER 3075 3076 static struct class *vtconsole_class; 3077 3078 static int do_bind_con_driver(const struct consw *csw, int first, int last, 3079 int deflt) 3080 { 3081 struct module *owner = csw->owner; 3082 const char *desc = NULL; 3083 struct con_driver *con_driver; 3084 int i, j = -1, k = -1, retval = -ENODEV; 3085 3086 if (!try_module_get(owner)) 3087 return -ENODEV; 3088 3089 WARN_CONSOLE_UNLOCKED(); 3090 3091 /* check if driver is registered */ 3092 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3093 con_driver = ®istered_con_driver[i]; 3094 3095 if (con_driver->con == csw) { 3096 desc = con_driver->desc; 3097 retval = 0; 3098 break; 3099 } 3100 } 3101 3102 if (retval) 3103 goto err; 3104 3105 if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) { 3106 csw->con_startup(); 3107 con_driver->flag |= CON_DRIVER_FLAG_INIT; 3108 } 3109 3110 if (deflt) { 3111 if (conswitchp) 3112 module_put(conswitchp->owner); 3113 3114 __module_get(owner); 3115 conswitchp = csw; 3116 } 3117 3118 first = max(first, con_driver->first); 3119 last = min(last, con_driver->last); 3120 3121 for (i = first; i <= last; i++) { 3122 int old_was_color; 3123 struct vc_data *vc = vc_cons[i].d; 3124 3125 if (con_driver_map[i]) 3126 module_put(con_driver_map[i]->owner); 3127 __module_get(owner); 3128 con_driver_map[i] = csw; 3129 3130 if (!vc || !vc->vc_sw) 3131 continue; 3132 3133 j = i; 3134 3135 if (CON_IS_VISIBLE(vc)) { 3136 k = i; 3137 save_screen(vc); 3138 } 3139 3140 old_was_color = vc->vc_can_do_color; 3141 vc->vc_sw->con_deinit(vc); 3142 vc->vc_origin = (unsigned long)vc->vc_screenbuf; 3143 visual_init(vc, i, 0); 3144 set_origin(vc); 3145 update_attr(vc); 3146 3147 /* If the console changed between mono <-> color, then 3148 * the attributes in the screenbuf will be wrong. The 3149 * following resets all attributes to something sane. 3150 */ 3151 if (old_was_color != vc->vc_can_do_color) 3152 clear_buffer_attributes(vc); 3153 } 3154 3155 pr_info("Console: switching "); 3156 if (!deflt) 3157 printk("consoles %d-%d ", first+1, last+1); 3158 if (j >= 0) { 3159 struct vc_data *vc = vc_cons[j].d; 3160 3161 printk("to %s %s %dx%d\n", 3162 vc->vc_can_do_color ? "colour" : "mono", 3163 desc, vc->vc_cols, vc->vc_rows); 3164 3165 if (k >= 0) { 3166 vc = vc_cons[k].d; 3167 update_screen(vc); 3168 } 3169 } else 3170 printk("to %s\n", desc); 3171 3172 retval = 0; 3173 err: 3174 module_put(owner); 3175 return retval; 3176 }; 3177 3178 3179 #ifdef CONFIG_VT_HW_CONSOLE_BINDING 3180 static int con_is_graphics(const struct consw *csw, int first, int last) 3181 { 3182 int i, retval = 0; 3183 3184 for (i = first; i <= last; i++) { 3185 struct vc_data *vc = vc_cons[i].d; 3186 3187 if (vc && vc->vc_mode == KD_GRAPHICS) { 3188 retval = 1; 3189 break; 3190 } 3191 } 3192 3193 return retval; 3194 } 3195 3196 /* unlocked version of unbind_con_driver() */ 3197 int do_unbind_con_driver(const struct consw *csw, int first, int last, int deflt) 3198 { 3199 struct module *owner = csw->owner; 3200 const struct consw *defcsw = NULL; 3201 struct con_driver *con_driver = NULL, *con_back = NULL; 3202 int i, retval = -ENODEV; 3203 3204 if (!try_module_get(owner)) 3205 return -ENODEV; 3206 3207 WARN_CONSOLE_UNLOCKED(); 3208 3209 /* check if driver is registered and if it is unbindable */ 3210 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3211 con_driver = ®istered_con_driver[i]; 3212 3213 if (con_driver->con == csw && 3214 con_driver->flag & CON_DRIVER_FLAG_MODULE) { 3215 retval = 0; 3216 break; 3217 } 3218 } 3219 3220 if (retval) 3221 goto err; 3222 3223 retval = -ENODEV; 3224 3225 /* check if backup driver exists */ 3226 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3227 con_back = ®istered_con_driver[i]; 3228 3229 if (con_back->con && con_back->con != csw) { 3230 defcsw = con_back->con; 3231 retval = 0; 3232 break; 3233 } 3234 } 3235 3236 if (retval) 3237 goto err; 3238 3239 if (!con_is_bound(csw)) 3240 goto err; 3241 3242 first = max(first, con_driver->first); 3243 last = min(last, con_driver->last); 3244 3245 for (i = first; i <= last; i++) { 3246 if (con_driver_map[i] == csw) { 3247 module_put(csw->owner); 3248 con_driver_map[i] = NULL; 3249 } 3250 } 3251 3252 if (!con_is_bound(defcsw)) { 3253 const struct consw *defconsw = conswitchp; 3254 3255 defcsw->con_startup(); 3256 con_back->flag |= CON_DRIVER_FLAG_INIT; 3257 /* 3258 * vgacon may change the default driver to point 3259 * to dummycon, we restore it here... 3260 */ 3261 conswitchp = defconsw; 3262 } 3263 3264 if (!con_is_bound(csw)) 3265 con_driver->flag &= ~CON_DRIVER_FLAG_INIT; 3266 3267 /* ignore return value, binding should not fail */ 3268 do_bind_con_driver(defcsw, first, last, deflt); 3269 err: 3270 module_put(owner); 3271 return retval; 3272 3273 } 3274 EXPORT_SYMBOL_GPL(do_unbind_con_driver); 3275 3276 static int vt_bind(struct con_driver *con) 3277 { 3278 const struct consw *defcsw = NULL, *csw = NULL; 3279 int i, more = 1, first = -1, last = -1, deflt = 0; 3280 3281 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) || 3282 con_is_graphics(con->con, con->first, con->last)) 3283 goto err; 3284 3285 csw = con->con; 3286 3287 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3288 struct con_driver *con = ®istered_con_driver[i]; 3289 3290 if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) { 3291 defcsw = con->con; 3292 break; 3293 } 3294 } 3295 3296 if (!defcsw) 3297 goto err; 3298 3299 while (more) { 3300 more = 0; 3301 3302 for (i = con->first; i <= con->last; i++) { 3303 if (con_driver_map[i] == defcsw) { 3304 if (first == -1) 3305 first = i; 3306 last = i; 3307 more = 1; 3308 } else if (first != -1) 3309 break; 3310 } 3311 3312 if (first == 0 && last == MAX_NR_CONSOLES -1) 3313 deflt = 1; 3314 3315 if (first != -1) { 3316 console_lock(); 3317 do_bind_con_driver(csw, first, last, deflt); 3318 console_unlock(); 3319 } 3320 3321 first = -1; 3322 last = -1; 3323 deflt = 0; 3324 } 3325 3326 err: 3327 return 0; 3328 } 3329 3330 static int vt_unbind(struct con_driver *con) 3331 { 3332 const struct consw *csw = NULL; 3333 int i, more = 1, first = -1, last = -1, deflt = 0; 3334 int ret; 3335 3336 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) || 3337 con_is_graphics(con->con, con->first, con->last)) 3338 goto err; 3339 3340 csw = con->con; 3341 3342 while (more) { 3343 more = 0; 3344 3345 for (i = con->first; i <= con->last; i++) { 3346 if (con_driver_map[i] == csw) { 3347 if (first == -1) 3348 first = i; 3349 last = i; 3350 more = 1; 3351 } else if (first != -1) 3352 break; 3353 } 3354 3355 if (first == 0 && last == MAX_NR_CONSOLES -1) 3356 deflt = 1; 3357 3358 if (first != -1) { 3359 console_lock(); 3360 ret = do_unbind_con_driver(csw, first, last, deflt); 3361 console_unlock(); 3362 if (ret != 0) 3363 return ret; 3364 } 3365 3366 first = -1; 3367 last = -1; 3368 deflt = 0; 3369 } 3370 3371 err: 3372 return 0; 3373 } 3374 #else 3375 static inline int vt_bind(struct con_driver *con) 3376 { 3377 return 0; 3378 } 3379 static inline int vt_unbind(struct con_driver *con) 3380 { 3381 return 0; 3382 } 3383 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */ 3384 3385 static ssize_t store_bind(struct device *dev, struct device_attribute *attr, 3386 const char *buf, size_t count) 3387 { 3388 struct con_driver *con = dev_get_drvdata(dev); 3389 int bind = simple_strtoul(buf, NULL, 0); 3390 3391 if (bind) 3392 vt_bind(con); 3393 else 3394 vt_unbind(con); 3395 3396 return count; 3397 } 3398 3399 static ssize_t show_bind(struct device *dev, struct device_attribute *attr, 3400 char *buf) 3401 { 3402 struct con_driver *con = dev_get_drvdata(dev); 3403 int bind = con_is_bound(con->con); 3404 3405 return snprintf(buf, PAGE_SIZE, "%i\n", bind); 3406 } 3407 3408 static ssize_t show_name(struct device *dev, struct device_attribute *attr, 3409 char *buf) 3410 { 3411 struct con_driver *con = dev_get_drvdata(dev); 3412 3413 return snprintf(buf, PAGE_SIZE, "%s %s\n", 3414 (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)", 3415 con->desc); 3416 3417 } 3418 3419 static struct device_attribute device_attrs[] = { 3420 __ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind), 3421 __ATTR(name, S_IRUGO, show_name, NULL), 3422 }; 3423 3424 static int vtconsole_init_device(struct con_driver *con) 3425 { 3426 int i; 3427 int error = 0; 3428 3429 con->flag |= CON_DRIVER_FLAG_ATTR; 3430 dev_set_drvdata(con->dev, con); 3431 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) { 3432 error = device_create_file(con->dev, &device_attrs[i]); 3433 if (error) 3434 break; 3435 } 3436 3437 if (error) { 3438 while (--i >= 0) 3439 device_remove_file(con->dev, &device_attrs[i]); 3440 con->flag &= ~CON_DRIVER_FLAG_ATTR; 3441 } 3442 3443 return error; 3444 } 3445 3446 static void vtconsole_deinit_device(struct con_driver *con) 3447 { 3448 int i; 3449 3450 if (con->flag & CON_DRIVER_FLAG_ATTR) { 3451 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) 3452 device_remove_file(con->dev, &device_attrs[i]); 3453 con->flag &= ~CON_DRIVER_FLAG_ATTR; 3454 } 3455 } 3456 3457 /** 3458 * con_is_bound - checks if driver is bound to the console 3459 * @csw: console driver 3460 * 3461 * RETURNS: zero if unbound, nonzero if bound 3462 * 3463 * Drivers can call this and if zero, they should release 3464 * all resources allocated on con_startup() 3465 */ 3466 int con_is_bound(const struct consw *csw) 3467 { 3468 int i, bound = 0; 3469 3470 for (i = 0; i < MAX_NR_CONSOLES; i++) { 3471 if (con_driver_map[i] == csw) { 3472 bound = 1; 3473 break; 3474 } 3475 } 3476 3477 return bound; 3478 } 3479 EXPORT_SYMBOL(con_is_bound); 3480 3481 /** 3482 * con_debug_enter - prepare the console for the kernel debugger 3483 * @sw: console driver 3484 * 3485 * Called when the console is taken over by the kernel debugger, this 3486 * function needs to save the current console state, then put the console 3487 * into a state suitable for the kernel debugger. 3488 * 3489 * RETURNS: 3490 * Zero on success, nonzero if a failure occurred when trying to prepare 3491 * the console for the debugger. 3492 */ 3493 int con_debug_enter(struct vc_data *vc) 3494 { 3495 int ret = 0; 3496 3497 saved_fg_console = fg_console; 3498 saved_last_console = last_console; 3499 saved_want_console = want_console; 3500 saved_vc_mode = vc->vc_mode; 3501 saved_console_blanked = console_blanked; 3502 vc->vc_mode = KD_TEXT; 3503 console_blanked = 0; 3504 if (vc->vc_sw->con_debug_enter) 3505 ret = vc->vc_sw->con_debug_enter(vc); 3506 #ifdef CONFIG_KGDB_KDB 3507 /* Set the initial LINES variable if it is not already set */ 3508 if (vc->vc_rows < 999) { 3509 int linecount; 3510 char lns[4]; 3511 const char *setargs[3] = { 3512 "set", 3513 "LINES", 3514 lns, 3515 }; 3516 if (kdbgetintenv(setargs[0], &linecount)) { 3517 snprintf(lns, 4, "%i", vc->vc_rows); 3518 kdb_set(2, setargs); 3519 } 3520 } 3521 if (vc->vc_cols < 999) { 3522 int colcount; 3523 char cols[4]; 3524 const char *setargs[3] = { 3525 "set", 3526 "COLUMNS", 3527 cols, 3528 }; 3529 if (kdbgetintenv(setargs[0], &colcount)) { 3530 snprintf(cols, 4, "%i", vc->vc_cols); 3531 kdb_set(2, setargs); 3532 } 3533 } 3534 #endif /* CONFIG_KGDB_KDB */ 3535 return ret; 3536 } 3537 EXPORT_SYMBOL_GPL(con_debug_enter); 3538 3539 /** 3540 * con_debug_leave - restore console state 3541 * @sw: console driver 3542 * 3543 * Restore the console state to what it was before the kernel debugger 3544 * was invoked. 3545 * 3546 * RETURNS: 3547 * Zero on success, nonzero if a failure occurred when trying to restore 3548 * the console. 3549 */ 3550 int con_debug_leave(void) 3551 { 3552 struct vc_data *vc; 3553 int ret = 0; 3554 3555 fg_console = saved_fg_console; 3556 last_console = saved_last_console; 3557 want_console = saved_want_console; 3558 console_blanked = saved_console_blanked; 3559 vc_cons[fg_console].d->vc_mode = saved_vc_mode; 3560 3561 vc = vc_cons[fg_console].d; 3562 if (vc->vc_sw->con_debug_leave) 3563 ret = vc->vc_sw->con_debug_leave(vc); 3564 return ret; 3565 } 3566 EXPORT_SYMBOL_GPL(con_debug_leave); 3567 3568 static int do_register_con_driver(const struct consw *csw, int first, int last) 3569 { 3570 struct module *owner = csw->owner; 3571 struct con_driver *con_driver; 3572 const char *desc; 3573 int i, retval = 0; 3574 3575 WARN_CONSOLE_UNLOCKED(); 3576 3577 if (!try_module_get(owner)) 3578 return -ENODEV; 3579 3580 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3581 con_driver = ®istered_con_driver[i]; 3582 3583 /* already registered */ 3584 if (con_driver->con == csw) 3585 retval = -EBUSY; 3586 } 3587 3588 if (retval) 3589 goto err; 3590 3591 desc = csw->con_startup(); 3592 3593 if (!desc) 3594 goto err; 3595 3596 retval = -EINVAL; 3597 3598 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3599 con_driver = ®istered_con_driver[i]; 3600 3601 if (con_driver->con == NULL) { 3602 con_driver->con = csw; 3603 con_driver->desc = desc; 3604 con_driver->node = i; 3605 con_driver->flag = CON_DRIVER_FLAG_MODULE | 3606 CON_DRIVER_FLAG_INIT; 3607 con_driver->first = first; 3608 con_driver->last = last; 3609 retval = 0; 3610 break; 3611 } 3612 } 3613 3614 if (retval) 3615 goto err; 3616 3617 con_driver->dev = device_create(vtconsole_class, NULL, 3618 MKDEV(0, con_driver->node), 3619 NULL, "vtcon%i", 3620 con_driver->node); 3621 3622 if (IS_ERR(con_driver->dev)) { 3623 printk(KERN_WARNING "Unable to create device for %s; " 3624 "errno = %ld\n", con_driver->desc, 3625 PTR_ERR(con_driver->dev)); 3626 con_driver->dev = NULL; 3627 } else { 3628 vtconsole_init_device(con_driver); 3629 } 3630 3631 err: 3632 module_put(owner); 3633 return retval; 3634 } 3635 3636 3637 /** 3638 * do_unregister_con_driver - unregister console driver from console layer 3639 * @csw: console driver 3640 * 3641 * DESCRIPTION: All drivers that registers to the console layer must 3642 * call this function upon exit, or if the console driver is in a state 3643 * where it won't be able to handle console services, such as the 3644 * framebuffer console without loaded framebuffer drivers. 3645 * 3646 * The driver must unbind first prior to unregistration. 3647 */ 3648 int do_unregister_con_driver(const struct consw *csw) 3649 { 3650 int i; 3651 3652 /* cannot unregister a bound driver */ 3653 if (con_is_bound(csw)) 3654 return -EBUSY; 3655 3656 if (csw == conswitchp) 3657 return -EINVAL; 3658 3659 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3660 struct con_driver *con_driver = ®istered_con_driver[i]; 3661 3662 if (con_driver->con == csw && 3663 con_driver->flag & CON_DRIVER_FLAG_INIT) { 3664 vtconsole_deinit_device(con_driver); 3665 device_destroy(vtconsole_class, 3666 MKDEV(0, con_driver->node)); 3667 con_driver->con = NULL; 3668 con_driver->desc = NULL; 3669 con_driver->dev = NULL; 3670 con_driver->node = 0; 3671 con_driver->flag = 0; 3672 con_driver->first = 0; 3673 con_driver->last = 0; 3674 return 0; 3675 } 3676 } 3677 3678 return -ENODEV; 3679 } 3680 EXPORT_SYMBOL_GPL(do_unregister_con_driver); 3681 3682 /* 3683 * If we support more console drivers, this function is used 3684 * when a driver wants to take over some existing consoles 3685 * and become default driver for newly opened ones. 3686 * 3687 * do_take_over_console is basically a register followed by unbind 3688 */ 3689 int do_take_over_console(const struct consw *csw, int first, int last, int deflt) 3690 { 3691 int err; 3692 3693 err = do_register_con_driver(csw, first, last); 3694 /* 3695 * If we get an busy error we still want to bind the console driver 3696 * and return success, as we may have unbound the console driver 3697 * but not unregistered it. 3698 */ 3699 if (err == -EBUSY) 3700 err = 0; 3701 if (!err) 3702 do_bind_con_driver(csw, first, last, deflt); 3703 3704 return err; 3705 } 3706 EXPORT_SYMBOL_GPL(do_take_over_console); 3707 3708 3709 /* 3710 * give_up_console is a wrapper to unregister_con_driver. It will only 3711 * work if driver is fully unbound. 3712 */ 3713 void give_up_console(const struct consw *csw) 3714 { 3715 console_lock(); 3716 do_unregister_con_driver(csw); 3717 console_unlock(); 3718 } 3719 3720 static int __init vtconsole_class_init(void) 3721 { 3722 int i; 3723 3724 vtconsole_class = class_create(THIS_MODULE, "vtconsole"); 3725 if (IS_ERR(vtconsole_class)) { 3726 printk(KERN_WARNING "Unable to create vt console class; " 3727 "errno = %ld\n", PTR_ERR(vtconsole_class)); 3728 vtconsole_class = NULL; 3729 } 3730 3731 /* Add system drivers to sysfs */ 3732 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3733 struct con_driver *con = ®istered_con_driver[i]; 3734 3735 if (con->con && !con->dev) { 3736 con->dev = device_create(vtconsole_class, NULL, 3737 MKDEV(0, con->node), 3738 NULL, "vtcon%i", 3739 con->node); 3740 3741 if (IS_ERR(con->dev)) { 3742 printk(KERN_WARNING "Unable to create " 3743 "device for %s; errno = %ld\n", 3744 con->desc, PTR_ERR(con->dev)); 3745 con->dev = NULL; 3746 } else { 3747 vtconsole_init_device(con); 3748 } 3749 } 3750 } 3751 3752 return 0; 3753 } 3754 postcore_initcall(vtconsole_class_init); 3755 3756 #endif 3757 3758 /* 3759 * Screen blanking 3760 */ 3761 3762 static int set_vesa_blanking(char __user *p) 3763 { 3764 unsigned int mode; 3765 3766 if (get_user(mode, p + 1)) 3767 return -EFAULT; 3768 3769 vesa_blank_mode = (mode < 4) ? mode : 0; 3770 return 0; 3771 } 3772 3773 void do_blank_screen(int entering_gfx) 3774 { 3775 struct vc_data *vc = vc_cons[fg_console].d; 3776 int i; 3777 3778 WARN_CONSOLE_UNLOCKED(); 3779 3780 if (console_blanked) { 3781 if (blank_state == blank_vesa_wait) { 3782 blank_state = blank_off; 3783 vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0); 3784 } 3785 return; 3786 } 3787 3788 /* entering graphics mode? */ 3789 if (entering_gfx) { 3790 hide_cursor(vc); 3791 save_screen(vc); 3792 vc->vc_sw->con_blank(vc, -1, 1); 3793 console_blanked = fg_console + 1; 3794 blank_state = blank_off; 3795 set_origin(vc); 3796 return; 3797 } 3798 3799 if (blank_state != blank_normal_wait) 3800 return; 3801 blank_state = blank_off; 3802 3803 /* don't blank graphics */ 3804 if (vc->vc_mode != KD_TEXT) { 3805 console_blanked = fg_console + 1; 3806 return; 3807 } 3808 3809 hide_cursor(vc); 3810 del_timer_sync(&console_timer); 3811 blank_timer_expired = 0; 3812 3813 save_screen(vc); 3814 /* In case we need to reset origin, blanking hook returns 1 */ 3815 i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0); 3816 console_blanked = fg_console + 1; 3817 if (i) 3818 set_origin(vc); 3819 3820 if (console_blank_hook && console_blank_hook(1)) 3821 return; 3822 3823 if (vesa_off_interval && vesa_blank_mode) { 3824 blank_state = blank_vesa_wait; 3825 mod_timer(&console_timer, jiffies + vesa_off_interval); 3826 } 3827 vt_event_post(VT_EVENT_BLANK, vc->vc_num, vc->vc_num); 3828 } 3829 EXPORT_SYMBOL(do_blank_screen); 3830 3831 /* 3832 * Called by timer as well as from vt_console_driver 3833 */ 3834 void do_unblank_screen(int leaving_gfx) 3835 { 3836 struct vc_data *vc; 3837 3838 /* This should now always be called from a "sane" (read: can schedule) 3839 * context for the sake of the low level drivers, except in the special 3840 * case of oops_in_progress 3841 */ 3842 if (!oops_in_progress) 3843 might_sleep(); 3844 3845 WARN_CONSOLE_UNLOCKED(); 3846 3847 ignore_poke = 0; 3848 if (!console_blanked) 3849 return; 3850 if (!vc_cons_allocated(fg_console)) { 3851 /* impossible */ 3852 pr_warning("unblank_screen: tty %d not allocated ??\n", 3853 fg_console+1); 3854 return; 3855 } 3856 vc = vc_cons[fg_console].d; 3857 /* Try to unblank in oops case too */ 3858 if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc)) 3859 return; /* but leave console_blanked != 0 */ 3860 3861 if (blankinterval) { 3862 mod_timer(&console_timer, jiffies + (blankinterval * HZ)); 3863 blank_state = blank_normal_wait; 3864 } 3865 3866 console_blanked = 0; 3867 if (vc->vc_sw->con_blank(vc, 0, leaving_gfx) || vt_force_oops_output(vc)) 3868 /* Low-level driver cannot restore -> do it ourselves */ 3869 update_screen(vc); 3870 if (console_blank_hook) 3871 console_blank_hook(0); 3872 set_palette(vc); 3873 set_cursor(vc); 3874 vt_event_post(VT_EVENT_UNBLANK, vc->vc_num, vc->vc_num); 3875 } 3876 EXPORT_SYMBOL(do_unblank_screen); 3877 3878 /* 3879 * This is called by the outside world to cause a forced unblank, mostly for 3880 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually 3881 * call it with 1 as an argument and so force a mode restore... that may kill 3882 * X or at least garbage the screen but would also make the Oops visible... 3883 */ 3884 void unblank_screen(void) 3885 { 3886 do_unblank_screen(0); 3887 } 3888 3889 /* 3890 * We defer the timer blanking to work queue so it can take the console mutex 3891 * (console operations can still happen at irq time, but only from printk which 3892 * has the console mutex. Not perfect yet, but better than no locking 3893 */ 3894 static void blank_screen_t(unsigned long dummy) 3895 { 3896 if (unlikely(!keventd_up())) { 3897 mod_timer(&console_timer, jiffies + (blankinterval * HZ)); 3898 return; 3899 } 3900 blank_timer_expired = 1; 3901 schedule_work(&console_work); 3902 } 3903 3904 void poke_blanked_console(void) 3905 { 3906 WARN_CONSOLE_UNLOCKED(); 3907 3908 /* Add this so we quickly catch whoever might call us in a non 3909 * safe context. Nowadays, unblank_screen() isn't to be called in 3910 * atomic contexts and is allowed to schedule (with the special case 3911 * of oops_in_progress, but that isn't of any concern for this 3912 * function. --BenH. 3913 */ 3914 might_sleep(); 3915 3916 /* This isn't perfectly race free, but a race here would be mostly harmless, 3917 * at worse, we'll do a spurrious blank and it's unlikely 3918 */ 3919 del_timer(&console_timer); 3920 blank_timer_expired = 0; 3921 3922 if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS) 3923 return; 3924 if (console_blanked) 3925 unblank_screen(); 3926 else if (blankinterval) { 3927 mod_timer(&console_timer, jiffies + (blankinterval * HZ)); 3928 blank_state = blank_normal_wait; 3929 } 3930 } 3931 3932 /* 3933 * Palettes 3934 */ 3935 3936 static void set_palette(struct vc_data *vc) 3937 { 3938 WARN_CONSOLE_UNLOCKED(); 3939 3940 if (vc->vc_mode != KD_GRAPHICS) 3941 vc->vc_sw->con_set_palette(vc, color_table); 3942 } 3943 3944 /* 3945 * Load palette into the DAC registers. arg points to a colour 3946 * map, 3 bytes per colour, 16 colours, range from 0 to 255. 3947 */ 3948 3949 int con_set_cmap(unsigned char __user *arg) 3950 { 3951 int i, j, k; 3952 unsigned char colormap[3*16]; 3953 3954 if (copy_from_user(colormap, arg, sizeof(colormap))) 3955 return -EFAULT; 3956 3957 console_lock(); 3958 for (i = k = 0; i < 16; i++) { 3959 default_red[i] = colormap[k++]; 3960 default_grn[i] = colormap[k++]; 3961 default_blu[i] = colormap[k++]; 3962 } 3963 for (i = 0; i < MAX_NR_CONSOLES; i++) { 3964 if (!vc_cons_allocated(i)) 3965 continue; 3966 for (j = k = 0; j < 16; j++) { 3967 vc_cons[i].d->vc_palette[k++] = default_red[j]; 3968 vc_cons[i].d->vc_palette[k++] = default_grn[j]; 3969 vc_cons[i].d->vc_palette[k++] = default_blu[j]; 3970 } 3971 set_palette(vc_cons[i].d); 3972 } 3973 console_unlock(); 3974 3975 return 0; 3976 } 3977 3978 int con_get_cmap(unsigned char __user *arg) 3979 { 3980 int i, k; 3981 unsigned char colormap[3*16]; 3982 3983 console_lock(); 3984 for (i = k = 0; i < 16; i++) { 3985 colormap[k++] = default_red[i]; 3986 colormap[k++] = default_grn[i]; 3987 colormap[k++] = default_blu[i]; 3988 } 3989 console_unlock(); 3990 3991 if (copy_to_user(arg, colormap, sizeof(colormap))) 3992 return -EFAULT; 3993 3994 return 0; 3995 } 3996 3997 void reset_palette(struct vc_data *vc) 3998 { 3999 int j, k; 4000 for (j=k=0; j<16; j++) { 4001 vc->vc_palette[k++] = default_red[j]; 4002 vc->vc_palette[k++] = default_grn[j]; 4003 vc->vc_palette[k++] = default_blu[j]; 4004 } 4005 set_palette(vc); 4006 } 4007 4008 /* 4009 * Font switching 4010 * 4011 * Currently we only support fonts up to 32 pixels wide, at a maximum height 4012 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints, 4013 * depending on width) reserved for each character which is kinda wasty, but 4014 * this is done in order to maintain compatibility with the EGA/VGA fonts. It 4015 * is up to the actual low-level console-driver convert data into its favorite 4016 * format (maybe we should add a `fontoffset' field to the `display' 4017 * structure so we won't have to convert the fontdata all the time. 4018 * /Jes 4019 */ 4020 4021 #define max_font_size 65536 4022 4023 static int con_font_get(struct vc_data *vc, struct console_font_op *op) 4024 { 4025 struct console_font font; 4026 int rc = -EINVAL; 4027 int c; 4028 4029 if (op->data) { 4030 font.data = kmalloc(max_font_size, GFP_KERNEL); 4031 if (!font.data) 4032 return -ENOMEM; 4033 } else 4034 font.data = NULL; 4035 4036 console_lock(); 4037 if (vc->vc_mode != KD_TEXT) 4038 rc = -EINVAL; 4039 else if (vc->vc_sw->con_font_get) 4040 rc = vc->vc_sw->con_font_get(vc, &font); 4041 else 4042 rc = -ENOSYS; 4043 console_unlock(); 4044 4045 if (rc) 4046 goto out; 4047 4048 c = (font.width+7)/8 * 32 * font.charcount; 4049 4050 if (op->data && font.charcount > op->charcount) 4051 rc = -ENOSPC; 4052 if (!(op->flags & KD_FONT_FLAG_OLD)) { 4053 if (font.width > op->width || font.height > op->height) 4054 rc = -ENOSPC; 4055 } else { 4056 if (font.width != 8) 4057 rc = -EIO; 4058 else if ((op->height && font.height > op->height) || 4059 font.height > 32) 4060 rc = -ENOSPC; 4061 } 4062 if (rc) 4063 goto out; 4064 4065 op->height = font.height; 4066 op->width = font.width; 4067 op->charcount = font.charcount; 4068 4069 if (op->data && copy_to_user(op->data, font.data, c)) 4070 rc = -EFAULT; 4071 4072 out: 4073 kfree(font.data); 4074 return rc; 4075 } 4076 4077 static int con_font_set(struct vc_data *vc, struct console_font_op *op) 4078 { 4079 struct console_font font; 4080 int rc = -EINVAL; 4081 int size; 4082 4083 if (vc->vc_mode != KD_TEXT) 4084 return -EINVAL; 4085 if (!op->data) 4086 return -EINVAL; 4087 if (op->charcount > 512) 4088 return -EINVAL; 4089 if (!op->height) { /* Need to guess font height [compat] */ 4090 int h, i; 4091 u8 __user *charmap = op->data; 4092 u8 tmp; 4093 4094 /* If from KDFONTOP ioctl, don't allow things which can be done in userland, 4095 so that we can get rid of this soon */ 4096 if (!(op->flags & KD_FONT_FLAG_OLD)) 4097 return -EINVAL; 4098 for (h = 32; h > 0; h--) 4099 for (i = 0; i < op->charcount; i++) { 4100 if (get_user(tmp, &charmap[32*i+h-1])) 4101 return -EFAULT; 4102 if (tmp) 4103 goto nonzero; 4104 } 4105 return -EINVAL; 4106 nonzero: 4107 op->height = h; 4108 } 4109 if (op->width <= 0 || op->width > 32 || op->height > 32) 4110 return -EINVAL; 4111 size = (op->width+7)/8 * 32 * op->charcount; 4112 if (size > max_font_size) 4113 return -ENOSPC; 4114 font.charcount = op->charcount; 4115 font.height = op->height; 4116 font.width = op->width; 4117 font.data = memdup_user(op->data, size); 4118 if (IS_ERR(font.data)) 4119 return PTR_ERR(font.data); 4120 console_lock(); 4121 if (vc->vc_mode != KD_TEXT) 4122 rc = -EINVAL; 4123 else if (vc->vc_sw->con_font_set) 4124 rc = vc->vc_sw->con_font_set(vc, &font, op->flags); 4125 else 4126 rc = -ENOSYS; 4127 console_unlock(); 4128 kfree(font.data); 4129 return rc; 4130 } 4131 4132 static int con_font_default(struct vc_data *vc, struct console_font_op *op) 4133 { 4134 struct console_font font = {.width = op->width, .height = op->height}; 4135 char name[MAX_FONT_NAME]; 4136 char *s = name; 4137 int rc; 4138 4139 4140 if (!op->data) 4141 s = NULL; 4142 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0) 4143 return -EFAULT; 4144 else 4145 name[MAX_FONT_NAME - 1] = 0; 4146 4147 console_lock(); 4148 if (vc->vc_mode != KD_TEXT) { 4149 console_unlock(); 4150 return -EINVAL; 4151 } 4152 if (vc->vc_sw->con_font_default) 4153 rc = vc->vc_sw->con_font_default(vc, &font, s); 4154 else 4155 rc = -ENOSYS; 4156 console_unlock(); 4157 if (!rc) { 4158 op->width = font.width; 4159 op->height = font.height; 4160 } 4161 return rc; 4162 } 4163 4164 static int con_font_copy(struct vc_data *vc, struct console_font_op *op) 4165 { 4166 int con = op->height; 4167 int rc; 4168 4169 4170 console_lock(); 4171 if (vc->vc_mode != KD_TEXT) 4172 rc = -EINVAL; 4173 else if (!vc->vc_sw->con_font_copy) 4174 rc = -ENOSYS; 4175 else if (con < 0 || !vc_cons_allocated(con)) 4176 rc = -ENOTTY; 4177 else if (con == vc->vc_num) /* nothing to do */ 4178 rc = 0; 4179 else 4180 rc = vc->vc_sw->con_font_copy(vc, con); 4181 console_unlock(); 4182 return rc; 4183 } 4184 4185 int con_font_op(struct vc_data *vc, struct console_font_op *op) 4186 { 4187 switch (op->op) { 4188 case KD_FONT_OP_SET: 4189 return con_font_set(vc, op); 4190 case KD_FONT_OP_GET: 4191 return con_font_get(vc, op); 4192 case KD_FONT_OP_SET_DEFAULT: 4193 return con_font_default(vc, op); 4194 case KD_FONT_OP_COPY: 4195 return con_font_copy(vc, op); 4196 } 4197 return -ENOSYS; 4198 } 4199 4200 /* 4201 * Interface exported to selection and vcs. 4202 */ 4203 4204 /* used by selection */ 4205 u16 screen_glyph(struct vc_data *vc, int offset) 4206 { 4207 u16 w = scr_readw(screenpos(vc, offset, 1)); 4208 u16 c = w & 0xff; 4209 4210 if (w & vc->vc_hi_font_mask) 4211 c |= 0x100; 4212 return c; 4213 } 4214 EXPORT_SYMBOL_GPL(screen_glyph); 4215 4216 /* used by vcs - note the word offset */ 4217 unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed) 4218 { 4219 return screenpos(vc, 2 * w_offset, viewed); 4220 } 4221 4222 void getconsxy(struct vc_data *vc, unsigned char *p) 4223 { 4224 p[0] = vc->vc_x; 4225 p[1] = vc->vc_y; 4226 } 4227 4228 void putconsxy(struct vc_data *vc, unsigned char *p) 4229 { 4230 hide_cursor(vc); 4231 gotoxy(vc, p[0], p[1]); 4232 set_cursor(vc); 4233 } 4234 4235 u16 vcs_scr_readw(struct vc_data *vc, const u16 *org) 4236 { 4237 if ((unsigned long)org == vc->vc_pos && softcursor_original != -1) 4238 return softcursor_original; 4239 return scr_readw(org); 4240 } 4241 4242 void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org) 4243 { 4244 scr_writew(val, org); 4245 if ((unsigned long)org == vc->vc_pos) { 4246 softcursor_original = -1; 4247 add_softcursor(vc); 4248 } 4249 } 4250 4251 void vcs_scr_updated(struct vc_data *vc) 4252 { 4253 notify_update(vc); 4254 } 4255 4256 /* 4257 * Visible symbols for modules 4258 */ 4259 4260 EXPORT_SYMBOL(color_table); 4261 EXPORT_SYMBOL(default_red); 4262 EXPORT_SYMBOL(default_grn); 4263 EXPORT_SYMBOL(default_blu); 4264 EXPORT_SYMBOL(update_region); 4265 EXPORT_SYMBOL(redraw_screen); 4266 EXPORT_SYMBOL(vc_resize); 4267 EXPORT_SYMBOL(fg_console); 4268 EXPORT_SYMBOL(console_blank_hook); 4269 EXPORT_SYMBOL(console_blanked); 4270 EXPORT_SYMBOL(vc_cons); 4271 EXPORT_SYMBOL(global_cursor_default); 4272 #ifndef VT_SINGLE_DRIVER 4273 EXPORT_SYMBOL(give_up_console); 4274 #endif 4275