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