1 /* 2 * Copyright (C) 1991, 1992 Linus Torvalds 3 */ 4 5 /* 6 * Hopefully this will be a rather complete VT102 implementation. 7 * 8 * Beeping thanks to John T Kohl. 9 * 10 * Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics 11 * Chars, and VT100 enhancements by Peter MacDonald. 12 * 13 * Copy and paste function by Andrew Haylett, 14 * some enhancements by Alessandro Rubini. 15 * 16 * Code to check for different video-cards mostly by Galen Hunt, 17 * <g-hunt@ee.utah.edu> 18 * 19 * Rudimentary ISO 10646/Unicode/UTF-8 character set support by 20 * Markus Kuhn, <mskuhn@immd4.informatik.uni-erlangen.de>. 21 * 22 * Dynamic allocation of consoles, aeb@cwi.nl, May 1994 23 * Resizing of consoles, aeb, 940926 24 * 25 * Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94 26 * <poe@daimi.aau.dk> 27 * 28 * User-defined bell sound, new setterm control sequences and printk 29 * redirection by Martin Mares <mj@k332.feld.cvut.cz> 19-Nov-95 30 * 31 * APM screenblank bug fixed Takashi Manabe <manabe@roy.dsl.tutics.tut.jp> 32 * 33 * Merge with the abstract console driver by Geert Uytterhoeven 34 * <geert@linux-m68k.org>, Jan 1997. 35 * 36 * Original m68k console driver modifications by 37 * 38 * - Arno Griffioen <arno@usn.nl> 39 * - David Carter <carter@cs.bris.ac.uk> 40 * 41 * The abstract console driver provides a generic interface for a text 42 * console. It supports VGA text mode, frame buffer based graphical consoles 43 * and special graphics processors that are only accessible through some 44 * registers (e.g. a TMS340x0 GSP). 45 * 46 * The interface to the hardware is specified using a special structure 47 * (struct consw) which contains function pointers to console operations 48 * (see <linux/console.h> for more information). 49 * 50 * Support for changeable cursor shape 51 * by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997 52 * 53 * Ported to i386 and con_scrolldelta fixed 54 * by Emmanuel Marty <core@ggi-project.org>, April 1998 55 * 56 * Resurrected character buffers in videoram plus lots of other trickery 57 * by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998 58 * 59 * Removed old-style timers, introduced console_timer, made timer 60 * deletion SMP-safe. 17Jun00, Andrew Morton 61 * 62 * Removed console_lock, enabled interrupts across all console operations 63 * 13 March 2001, Andrew Morton 64 * 65 * Fixed UTF-8 mode so alternate charset modes always work according 66 * to control sequences interpreted in do_con_trol function 67 * preserving backward VT100 semigraphics compatibility, 68 * malformed UTF sequences represented as sequences of replacement glyphs, 69 * original codes or '?' as a last resort if replacement glyph is undefined 70 * by Adam Tla/lka <atlka@pg.gda.pl>, Aug 2006 71 */ 72 73 #include <linux/module.h> 74 #include <linux/types.h> 75 #include <linux/sched.h> 76 #include <linux/tty.h> 77 #include <linux/tty_flip.h> 78 #include <linux/kernel.h> 79 #include <linux/string.h> 80 #include <linux/errno.h> 81 #include <linux/kd.h> 82 #include <linux/slab.h> 83 #include <linux/major.h> 84 #include <linux/mm.h> 85 #include <linux/console.h> 86 #include <linux/init.h> 87 #include <linux/mutex.h> 88 #include <linux/vt_kern.h> 89 #include <linux/selection.h> 90 #include <linux/tiocl.h> 91 #include <linux/kbd_kern.h> 92 #include <linux/consolemap.h> 93 #include <linux/timer.h> 94 #include <linux/interrupt.h> 95 #include <linux/workqueue.h> 96 #include <linux/pm.h> 97 #include <linux/font.h> 98 #include <linux/bitops.h> 99 #include <linux/notifier.h> 100 #include <linux/device.h> 101 #include <linux/io.h> 102 #include <linux/uaccess.h> 103 #include <linux/kdb.h> 104 #include <linux/ctype.h> 105 106 #define MAX_NR_CON_DRIVER 16 107 108 #define CON_DRIVER_FLAG_MODULE 1 109 #define CON_DRIVER_FLAG_INIT 2 110 #define CON_DRIVER_FLAG_ATTR 4 111 #define CON_DRIVER_FLAG_ZOMBIE 8 112 113 struct con_driver { 114 const struct consw *con; 115 const char *desc; 116 struct device *dev; 117 int node; 118 int first; 119 int last; 120 int flag; 121 }; 122 123 static struct con_driver registered_con_driver[MAX_NR_CON_DRIVER]; 124 const struct consw *conswitchp; 125 126 /* A bitmap for codes <32. A bit of 1 indicates that the code 127 * corresponding to that bit number invokes some special action 128 * (such as cursor movement) and should not be displayed as a 129 * glyph unless the disp_ctrl mode is explicitly enabled. 130 */ 131 #define CTRL_ACTION 0x0d00ff81 132 #define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */ 133 134 /* 135 * Here is the default bell parameters: 750HZ, 1/8th of a second 136 */ 137 #define DEFAULT_BELL_PITCH 750 138 #define DEFAULT_BELL_DURATION (HZ/8) 139 #define DEFAULT_CURSOR_BLINK_MS 200 140 141 struct vc vc_cons [MAX_NR_CONSOLES]; 142 143 #ifndef VT_SINGLE_DRIVER 144 static const struct consw *con_driver_map[MAX_NR_CONSOLES]; 145 #endif 146 147 static int con_open(struct tty_struct *, struct file *); 148 static void vc_init(struct vc_data *vc, unsigned int rows, 149 unsigned int cols, int do_clear); 150 static void gotoxy(struct vc_data *vc, int new_x, int new_y); 151 static void save_cur(struct vc_data *vc); 152 static void reset_terminal(struct vc_data *vc, int do_clear); 153 static void con_flush_chars(struct tty_struct *tty); 154 static int set_vesa_blanking(char __user *p); 155 static void set_cursor(struct vc_data *vc); 156 static void hide_cursor(struct vc_data *vc); 157 static void console_callback(struct work_struct *ignored); 158 static void con_driver_unregister_callback(struct work_struct *ignored); 159 static void blank_screen_t(unsigned long dummy); 160 static void set_palette(struct vc_data *vc); 161 162 #define vt_get_kmsg_redirect() vt_kmsg_redirect(-1) 163 164 static int printable; /* Is console ready for printing? */ 165 int default_utf8 = true; 166 module_param(default_utf8, int, S_IRUGO | S_IWUSR); 167 int global_cursor_default = -1; 168 module_param(global_cursor_default, int, S_IRUGO | S_IWUSR); 169 170 static int cur_default = CUR_DEFAULT; 171 module_param(cur_default, int, S_IRUGO | S_IWUSR); 172 173 /* 174 * ignore_poke: don't unblank the screen when things are typed. This is 175 * mainly for the privacy of braille terminal users. 176 */ 177 static int ignore_poke; 178 179 int do_poke_blanked_console; 180 int console_blanked; 181 182 static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */ 183 static int vesa_off_interval; 184 static int blankinterval = 10*60; 185 core_param(consoleblank, blankinterval, int, 0444); 186 187 static DECLARE_WORK(console_work, console_callback); 188 static DECLARE_WORK(con_driver_unregister_work, con_driver_unregister_callback); 189 190 /* 191 * fg_console is the current virtual console, 192 * last_console is the last used one, 193 * want_console is the console we want to switch to, 194 * saved_* variants are for save/restore around kernel debugger enter/leave 195 */ 196 int fg_console; 197 int last_console; 198 int want_console = -1; 199 static int saved_fg_console; 200 static int saved_last_console; 201 static int saved_want_console; 202 static int saved_vc_mode; 203 static int saved_console_blanked; 204 205 /* 206 * For each existing display, we have a pointer to console currently visible 207 * on that display, allowing consoles other than fg_console to be refreshed 208 * appropriately. Unless the low-level driver supplies its own display_fg 209 * variable, we use this one for the "master display". 210 */ 211 static struct vc_data *master_display_fg; 212 213 /* 214 * Unfortunately, we need to delay tty echo when we're currently writing to the 215 * console since the code is (and always was) not re-entrant, so we schedule 216 * all flip requests to process context with schedule-task() and run it from 217 * console_callback(). 218 */ 219 220 /* 221 * For the same reason, we defer scrollback to the console callback. 222 */ 223 static int scrollback_delta; 224 225 /* 226 * Hook so that the power management routines can (un)blank 227 * the console on our behalf. 228 */ 229 int (*console_blank_hook)(int); 230 231 static DEFINE_TIMER(console_timer, blank_screen_t, 0, 0); 232 static int blank_state; 233 static int blank_timer_expired; 234 enum { 235 blank_off = 0, 236 blank_normal_wait, 237 blank_vesa_wait, 238 }; 239 240 /* 241 * /sys/class/tty/tty0/ 242 * 243 * the attribute 'active' contains the name of the current vc 244 * console and it supports poll() to detect vc switches 245 */ 246 static struct device *tty0dev; 247 248 /* 249 * Notifier list for console events. 250 */ 251 static ATOMIC_NOTIFIER_HEAD(vt_notifier_list); 252 253 int register_vt_notifier(struct notifier_block *nb) 254 { 255 return atomic_notifier_chain_register(&vt_notifier_list, nb); 256 } 257 EXPORT_SYMBOL_GPL(register_vt_notifier); 258 259 int unregister_vt_notifier(struct notifier_block *nb) 260 { 261 return atomic_notifier_chain_unregister(&vt_notifier_list, nb); 262 } 263 EXPORT_SYMBOL_GPL(unregister_vt_notifier); 264 265 static void notify_write(struct vc_data *vc, unsigned int unicode) 266 { 267 struct vt_notifier_param param = { .vc = vc, .c = unicode }; 268 atomic_notifier_call_chain(&vt_notifier_list, VT_WRITE, ¶m); 269 } 270 271 static void notify_update(struct vc_data *vc) 272 { 273 struct vt_notifier_param param = { .vc = vc }; 274 atomic_notifier_call_chain(&vt_notifier_list, VT_UPDATE, ¶m); 275 } 276 /* 277 * Low-Level Functions 278 */ 279 280 #define IS_FG(vc) ((vc)->vc_num == fg_console) 281 282 #ifdef VT_BUF_VRAM_ONLY 283 #define DO_UPDATE(vc) 0 284 #else 285 #define DO_UPDATE(vc) (CON_IS_VISIBLE(vc) && !console_blanked) 286 #endif 287 288 static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed) 289 { 290 unsigned short *p; 291 292 if (!viewed) 293 p = (unsigned short *)(vc->vc_origin + offset); 294 else if (!vc->vc_sw->con_screen_pos) 295 p = (unsigned short *)(vc->vc_visible_origin + offset); 296 else 297 p = vc->vc_sw->con_screen_pos(vc, offset); 298 return p; 299 } 300 301 /* Called from the keyboard irq path.. */ 302 static inline void scrolldelta(int lines) 303 { 304 /* FIXME */ 305 /* scrolldelta needs some kind of consistency lock, but the BKL was 306 and still is not protecting versus the scheduled back end */ 307 scrollback_delta += lines; 308 schedule_console_callback(); 309 } 310 311 void schedule_console_callback(void) 312 { 313 schedule_work(&console_work); 314 } 315 316 static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr) 317 { 318 unsigned short *d, *s; 319 320 if (t+nr >= b) 321 nr = b - t - 1; 322 if (b > vc->vc_rows || t >= b || nr < 1) 323 return; 324 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr)) 325 return; 326 d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t); 327 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr)); 328 scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row); 329 scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_video_erase_char, 330 vc->vc_size_row * nr); 331 } 332 333 static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr) 334 { 335 unsigned short *s; 336 unsigned int step; 337 338 if (t+nr >= b) 339 nr = b - t - 1; 340 if (b > vc->vc_rows || t >= b || nr < 1) 341 return; 342 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr)) 343 return; 344 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t); 345 step = vc->vc_cols * nr; 346 scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row); 347 scr_memsetw(s, vc->vc_video_erase_char, 2 * step); 348 } 349 350 static void do_update_region(struct vc_data *vc, unsigned long start, int count) 351 { 352 #ifndef VT_BUF_VRAM_ONLY 353 unsigned int xx, yy, offset; 354 u16 *p; 355 356 p = (u16 *) start; 357 if (!vc->vc_sw->con_getxy) { 358 offset = (start - vc->vc_origin) / 2; 359 xx = offset % vc->vc_cols; 360 yy = offset / vc->vc_cols; 361 } else { 362 int nxx, nyy; 363 start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy); 364 xx = nxx; yy = nyy; 365 } 366 for(;;) { 367 u16 attrib = scr_readw(p) & 0xff00; 368 int startx = xx; 369 u16 *q = p; 370 while (xx < vc->vc_cols && count) { 371 if (attrib != (scr_readw(p) & 0xff00)) { 372 if (p > q) 373 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx); 374 startx = xx; 375 q = p; 376 attrib = scr_readw(p) & 0xff00; 377 } 378 p++; 379 xx++; 380 count--; 381 } 382 if (p > q) 383 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx); 384 if (!count) 385 break; 386 xx = 0; 387 yy++; 388 if (vc->vc_sw->con_getxy) { 389 p = (u16 *)start; 390 start = vc->vc_sw->con_getxy(vc, start, NULL, NULL); 391 } 392 } 393 #endif 394 } 395 396 void update_region(struct vc_data *vc, unsigned long start, int count) 397 { 398 WARN_CONSOLE_UNLOCKED(); 399 400 if (DO_UPDATE(vc)) { 401 hide_cursor(vc); 402 do_update_region(vc, start, count); 403 set_cursor(vc); 404 } 405 } 406 407 /* Structure of attributes is hardware-dependent */ 408 409 static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink, 410 u8 _underline, u8 _reverse, u8 _italic) 411 { 412 if (vc->vc_sw->con_build_attr) 413 return vc->vc_sw->con_build_attr(vc, _color, _intensity, 414 _blink, _underline, _reverse, _italic); 415 416 #ifndef VT_BUF_VRAM_ONLY 417 /* 418 * ++roman: I completely changed the attribute format for monochrome 419 * mode (!can_do_color). The formerly used MDA (monochrome display 420 * adapter) format didn't allow the combination of certain effects. 421 * Now the attribute is just a bit vector: 422 * Bit 0..1: intensity (0..2) 423 * Bit 2 : underline 424 * Bit 3 : reverse 425 * Bit 7 : blink 426 */ 427 { 428 u8 a = _color; 429 if (!vc->vc_can_do_color) 430 return _intensity | 431 (_italic ? 2 : 0) | 432 (_underline ? 4 : 0) | 433 (_reverse ? 8 : 0) | 434 (_blink ? 0x80 : 0); 435 if (_italic) 436 a = (a & 0xF0) | vc->vc_itcolor; 437 else if (_underline) 438 a = (a & 0xf0) | vc->vc_ulcolor; 439 else if (_intensity == 0) 440 a = (a & 0xf0) | vc->vc_ulcolor; 441 if (_reverse) 442 a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77); 443 if (_blink) 444 a ^= 0x80; 445 if (_intensity == 2) 446 a ^= 0x08; 447 if (vc->vc_hi_font_mask == 0x100) 448 a <<= 1; 449 return a; 450 } 451 #else 452 return 0; 453 #endif 454 } 455 456 static void update_attr(struct vc_data *vc) 457 { 458 vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity, 459 vc->vc_blink, vc->vc_underline, 460 vc->vc_reverse ^ vc->vc_decscnm, vc->vc_italic); 461 vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm, 0) << 8) | ' '; 462 } 463 464 /* Note: inverting the screen twice should revert to the original state */ 465 void invert_screen(struct vc_data *vc, int offset, int count, int viewed) 466 { 467 unsigned short *p; 468 469 WARN_CONSOLE_UNLOCKED(); 470 471 count /= 2; 472 p = screenpos(vc, offset, viewed); 473 if (vc->vc_sw->con_invert_region) 474 vc->vc_sw->con_invert_region(vc, p, count); 475 #ifndef VT_BUF_VRAM_ONLY 476 else { 477 u16 *q = p; 478 int cnt = count; 479 u16 a; 480 481 if (!vc->vc_can_do_color) { 482 while (cnt--) { 483 a = scr_readw(q); 484 a ^= 0x0800; 485 scr_writew(a, q); 486 q++; 487 } 488 } else if (vc->vc_hi_font_mask == 0x100) { 489 while (cnt--) { 490 a = scr_readw(q); 491 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4); 492 scr_writew(a, q); 493 q++; 494 } 495 } else { 496 while (cnt--) { 497 a = scr_readw(q); 498 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4); 499 scr_writew(a, q); 500 q++; 501 } 502 } 503 } 504 #endif 505 if (DO_UPDATE(vc)) 506 do_update_region(vc, (unsigned long) p, count); 507 notify_update(vc); 508 } 509 510 /* used by selection: complement pointer position */ 511 void complement_pos(struct vc_data *vc, int offset) 512 { 513 static int old_offset = -1; 514 static unsigned short old; 515 static unsigned short oldx, oldy; 516 517 WARN_CONSOLE_UNLOCKED(); 518 519 if (old_offset != -1 && old_offset >= 0 && 520 old_offset < vc->vc_screenbuf_size) { 521 scr_writew(old, screenpos(vc, old_offset, 1)); 522 if (DO_UPDATE(vc)) 523 vc->vc_sw->con_putc(vc, old, oldy, oldx); 524 notify_update(vc); 525 } 526 527 old_offset = offset; 528 529 if (offset != -1 && offset >= 0 && 530 offset < vc->vc_screenbuf_size) { 531 unsigned short new; 532 unsigned short *p; 533 p = screenpos(vc, offset, 1); 534 old = scr_readw(p); 535 new = old ^ vc->vc_complement_mask; 536 scr_writew(new, p); 537 if (DO_UPDATE(vc)) { 538 oldx = (offset >> 1) % vc->vc_cols; 539 oldy = (offset >> 1) / vc->vc_cols; 540 vc->vc_sw->con_putc(vc, new, oldy, oldx); 541 } 542 notify_update(vc); 543 } 544 } 545 546 static void insert_char(struct vc_data *vc, unsigned int nr) 547 { 548 unsigned short *p = (unsigned short *) vc->vc_pos; 549 550 scr_memmovew(p + nr, p, (vc->vc_cols - vc->vc_x - nr) * 2); 551 scr_memsetw(p, vc->vc_video_erase_char, nr * 2); 552 vc->vc_need_wrap = 0; 553 if (DO_UPDATE(vc)) 554 do_update_region(vc, (unsigned long) p, 555 vc->vc_cols - vc->vc_x); 556 } 557 558 static void delete_char(struct vc_data *vc, unsigned int nr) 559 { 560 unsigned short *p = (unsigned short *) vc->vc_pos; 561 562 scr_memcpyw(p, p + nr, (vc->vc_cols - vc->vc_x - nr) * 2); 563 scr_memsetw(p + vc->vc_cols - vc->vc_x - nr, vc->vc_video_erase_char, 564 nr * 2); 565 vc->vc_need_wrap = 0; 566 if (DO_UPDATE(vc)) 567 do_update_region(vc, (unsigned long) p, 568 vc->vc_cols - vc->vc_x); 569 } 570 571 static int softcursor_original = -1; 572 573 static void add_softcursor(struct vc_data *vc) 574 { 575 int i = scr_readw((u16 *) vc->vc_pos); 576 u32 type = vc->vc_cursor_type; 577 578 if (! (type & 0x10)) return; 579 if (softcursor_original != -1) return; 580 softcursor_original = i; 581 i |= ((type >> 8) & 0xff00 ); 582 i ^= ((type) & 0xff00 ); 583 if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000; 584 if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700; 585 scr_writew(i, (u16 *) vc->vc_pos); 586 if (DO_UPDATE(vc)) 587 vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x); 588 } 589 590 static void hide_softcursor(struct vc_data *vc) 591 { 592 if (softcursor_original != -1) { 593 scr_writew(softcursor_original, (u16 *)vc->vc_pos); 594 if (DO_UPDATE(vc)) 595 vc->vc_sw->con_putc(vc, softcursor_original, 596 vc->vc_y, vc->vc_x); 597 softcursor_original = -1; 598 } 599 } 600 601 static void hide_cursor(struct vc_data *vc) 602 { 603 if (vc == sel_cons) 604 clear_selection(); 605 vc->vc_sw->con_cursor(vc, CM_ERASE); 606 hide_softcursor(vc); 607 } 608 609 static void set_cursor(struct vc_data *vc) 610 { 611 if (!IS_FG(vc) || console_blanked || 612 vc->vc_mode == KD_GRAPHICS) 613 return; 614 if (vc->vc_deccm) { 615 if (vc == sel_cons) 616 clear_selection(); 617 add_softcursor(vc); 618 if ((vc->vc_cursor_type & 0x0f) != 1) 619 vc->vc_sw->con_cursor(vc, CM_DRAW); 620 } else 621 hide_cursor(vc); 622 } 623 624 static void set_origin(struct vc_data *vc) 625 { 626 WARN_CONSOLE_UNLOCKED(); 627 628 if (!CON_IS_VISIBLE(vc) || 629 !vc->vc_sw->con_set_origin || 630 !vc->vc_sw->con_set_origin(vc)) 631 vc->vc_origin = (unsigned long)vc->vc_screenbuf; 632 vc->vc_visible_origin = vc->vc_origin; 633 vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size; 634 vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x; 635 } 636 637 static void save_screen(struct vc_data *vc) 638 { 639 WARN_CONSOLE_UNLOCKED(); 640 641 if (vc->vc_sw->con_save_screen) 642 vc->vc_sw->con_save_screen(vc); 643 } 644 645 /* 646 * Redrawing of screen 647 */ 648 649 void clear_buffer_attributes(struct vc_data *vc) 650 { 651 unsigned short *p = (unsigned short *)vc->vc_origin; 652 int count = vc->vc_screenbuf_size / 2; 653 int mask = vc->vc_hi_font_mask | 0xff; 654 655 for (; count > 0; count--, p++) { 656 scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p); 657 } 658 } 659 660 void redraw_screen(struct vc_data *vc, int is_switch) 661 { 662 int redraw = 0; 663 664 WARN_CONSOLE_UNLOCKED(); 665 666 if (!vc) { 667 /* strange ... */ 668 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */ 669 return; 670 } 671 672 if (is_switch) { 673 struct vc_data *old_vc = vc_cons[fg_console].d; 674 if (old_vc == vc) 675 return; 676 if (!CON_IS_VISIBLE(vc)) 677 redraw = 1; 678 *vc->vc_display_fg = vc; 679 fg_console = vc->vc_num; 680 hide_cursor(old_vc); 681 if (!CON_IS_VISIBLE(old_vc)) { 682 save_screen(old_vc); 683 set_origin(old_vc); 684 } 685 if (tty0dev) 686 sysfs_notify(&tty0dev->kobj, NULL, "active"); 687 } else { 688 hide_cursor(vc); 689 redraw = 1; 690 } 691 692 if (redraw) { 693 int update; 694 int old_was_color = vc->vc_can_do_color; 695 696 set_origin(vc); 697 update = vc->vc_sw->con_switch(vc); 698 set_palette(vc); 699 /* 700 * If console changed from mono<->color, the best we can do 701 * is to clear the buffer attributes. As it currently stands, 702 * rebuilding new attributes from the old buffer is not doable 703 * without overly complex code. 704 */ 705 if (old_was_color != vc->vc_can_do_color) { 706 update_attr(vc); 707 clear_buffer_attributes(vc); 708 } 709 710 /* Forcibly update if we're panicing */ 711 if ((update && vc->vc_mode != KD_GRAPHICS) || 712 vt_force_oops_output(vc)) 713 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2); 714 } 715 set_cursor(vc); 716 if (is_switch) { 717 set_leds(); 718 compute_shiftstate(); 719 notify_update(vc); 720 } 721 } 722 723 /* 724 * Allocation, freeing and resizing of VTs. 725 */ 726 727 int vc_cons_allocated(unsigned int i) 728 { 729 return (i < MAX_NR_CONSOLES && vc_cons[i].d); 730 } 731 732 static void visual_init(struct vc_data *vc, int num, int init) 733 { 734 /* ++Geert: vc->vc_sw->con_init determines console size */ 735 if (vc->vc_sw) 736 module_put(vc->vc_sw->owner); 737 vc->vc_sw = conswitchp; 738 #ifndef VT_SINGLE_DRIVER 739 if (con_driver_map[num]) 740 vc->vc_sw = con_driver_map[num]; 741 #endif 742 __module_get(vc->vc_sw->owner); 743 vc->vc_num = num; 744 vc->vc_display_fg = &master_display_fg; 745 if (vc->vc_uni_pagedir_loc) 746 con_free_unimap(vc); 747 vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir; 748 vc->vc_uni_pagedir = NULL; 749 vc->vc_hi_font_mask = 0; 750 vc->vc_complement_mask = 0; 751 vc->vc_can_do_color = 0; 752 vc->vc_panic_force_write = false; 753 vc->vc_cur_blink_ms = DEFAULT_CURSOR_BLINK_MS; 754 vc->vc_sw->con_init(vc, init); 755 if (!vc->vc_complement_mask) 756 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 757 vc->vc_s_complement_mask = vc->vc_complement_mask; 758 vc->vc_size_row = vc->vc_cols << 1; 759 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row; 760 } 761 762 int vc_allocate(unsigned int currcons) /* return 0 on success */ 763 { 764 struct vt_notifier_param param; 765 struct vc_data *vc; 766 767 WARN_CONSOLE_UNLOCKED(); 768 769 if (currcons >= MAX_NR_CONSOLES) 770 return -ENXIO; 771 772 if (vc_cons[currcons].d) 773 return 0; 774 775 /* due to the granularity of kmalloc, we waste some memory here */ 776 /* the alloc is done in two steps, to optimize the common situation 777 of a 25x80 console (structsize=216, screenbuf_size=4000) */ 778 /* although the numbers above are not valid since long ago, the 779 point is still up-to-date and the comment still has its value 780 even if only as a historical artifact. --mj, July 1998 */ 781 param.vc = vc = kzalloc(sizeof(struct vc_data), GFP_KERNEL); 782 if (!vc) 783 return -ENOMEM; 784 785 vc_cons[currcons].d = vc; 786 tty_port_init(&vc->port); 787 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK); 788 789 visual_init(vc, currcons, 1); 790 791 if (!*vc->vc_uni_pagedir_loc) 792 con_set_default_unimap(vc); 793 794 vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL); 795 if (!vc->vc_screenbuf) 796 goto err_free; 797 798 /* If no drivers have overridden us and the user didn't pass a 799 boot option, default to displaying the cursor */ 800 if (global_cursor_default == -1) 801 global_cursor_default = 1; 802 803 vc_init(vc, vc->vc_rows, vc->vc_cols, 1); 804 vcs_make_sysfs(currcons); 805 atomic_notifier_call_chain(&vt_notifier_list, VT_ALLOCATE, ¶m); 806 807 return 0; 808 err_free: 809 kfree(vc); 810 vc_cons[currcons].d = NULL; 811 return -ENOMEM; 812 } 813 814 static inline int resize_screen(struct vc_data *vc, int width, int height, 815 int user) 816 { 817 /* Resizes the resolution of the display adapater */ 818 int err = 0; 819 820 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize) 821 err = vc->vc_sw->con_resize(vc, width, height, user); 822 823 return err; 824 } 825 826 /* 827 * Change # of rows and columns (0 means unchanged/the size of fg_console) 828 * [this is to be used together with some user program 829 * like resize that changes the hardware videomode] 830 */ 831 #define VC_RESIZE_MAXCOL (32767) 832 #define VC_RESIZE_MAXROW (32767) 833 834 /** 835 * vc_do_resize - resizing method for the tty 836 * @tty: tty being resized 837 * @real_tty: real tty (different to tty if a pty/tty pair) 838 * @vc: virtual console private data 839 * @cols: columns 840 * @lines: lines 841 * 842 * Resize a virtual console, clipping according to the actual constraints. 843 * If the caller passes a tty structure then update the termios winsize 844 * information and perform any necessary signal handling. 845 * 846 * Caller must hold the console semaphore. Takes the termios rwsem and 847 * ctrl_lock of the tty IFF a tty is passed. 848 */ 849 850 static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc, 851 unsigned int cols, unsigned int lines) 852 { 853 unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0; 854 unsigned long end; 855 unsigned int old_rows, old_row_size; 856 unsigned int new_cols, new_rows, new_row_size, new_screen_size; 857 unsigned int user; 858 unsigned short *newscreen; 859 860 WARN_CONSOLE_UNLOCKED(); 861 862 if (!vc) 863 return -ENXIO; 864 865 user = vc->vc_resize_user; 866 vc->vc_resize_user = 0; 867 868 if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW) 869 return -EINVAL; 870 871 new_cols = (cols ? cols : vc->vc_cols); 872 new_rows = (lines ? lines : vc->vc_rows); 873 new_row_size = new_cols << 1; 874 new_screen_size = new_row_size * new_rows; 875 876 if (new_cols == vc->vc_cols && new_rows == vc->vc_rows) 877 return 0; 878 879 newscreen = kmalloc(new_screen_size, GFP_USER); 880 if (!newscreen) 881 return -ENOMEM; 882 883 old_rows = vc->vc_rows; 884 old_row_size = vc->vc_size_row; 885 886 err = resize_screen(vc, new_cols, new_rows, user); 887 if (err) { 888 kfree(newscreen); 889 return err; 890 } 891 892 vc->vc_rows = new_rows; 893 vc->vc_cols = new_cols; 894 vc->vc_size_row = new_row_size; 895 vc->vc_screenbuf_size = new_screen_size; 896 897 rlth = min(old_row_size, new_row_size); 898 rrem = new_row_size - rlth; 899 old_origin = vc->vc_origin; 900 new_origin = (long) newscreen; 901 new_scr_end = new_origin + new_screen_size; 902 903 if (vc->vc_y > new_rows) { 904 if (old_rows - vc->vc_y < new_rows) { 905 /* 906 * Cursor near the bottom, copy contents from the 907 * bottom of buffer 908 */ 909 old_origin += (old_rows - new_rows) * old_row_size; 910 } else { 911 /* 912 * Cursor is in no man's land, copy 1/2 screenful 913 * from the top and bottom of cursor position 914 */ 915 old_origin += (vc->vc_y - new_rows/2) * old_row_size; 916 } 917 } 918 919 end = old_origin + old_row_size * min(old_rows, new_rows); 920 921 update_attr(vc); 922 923 while (old_origin < end) { 924 scr_memcpyw((unsigned short *) new_origin, 925 (unsigned short *) old_origin, rlth); 926 if (rrem) 927 scr_memsetw((void *)(new_origin + rlth), 928 vc->vc_video_erase_char, rrem); 929 old_origin += old_row_size; 930 new_origin += new_row_size; 931 } 932 if (new_scr_end > new_origin) 933 scr_memsetw((void *)new_origin, vc->vc_video_erase_char, 934 new_scr_end - new_origin); 935 kfree(vc->vc_screenbuf); 936 vc->vc_screenbuf = newscreen; 937 vc->vc_screenbuf_size = new_screen_size; 938 set_origin(vc); 939 940 /* do part of a reset_terminal() */ 941 vc->vc_top = 0; 942 vc->vc_bottom = vc->vc_rows; 943 gotoxy(vc, vc->vc_x, vc->vc_y); 944 save_cur(vc); 945 946 if (tty) { 947 /* Rewrite the requested winsize data with the actual 948 resulting sizes */ 949 struct winsize ws; 950 memset(&ws, 0, sizeof(ws)); 951 ws.ws_row = vc->vc_rows; 952 ws.ws_col = vc->vc_cols; 953 ws.ws_ypixel = vc->vc_scan_lines; 954 tty_do_resize(tty, &ws); 955 } 956 957 if (CON_IS_VISIBLE(vc)) 958 update_screen(vc); 959 vt_event_post(VT_EVENT_RESIZE, vc->vc_num, vc->vc_num); 960 return err; 961 } 962 963 /** 964 * vc_resize - resize a VT 965 * @vc: virtual console 966 * @cols: columns 967 * @rows: rows 968 * 969 * Resize a virtual console as seen from the console end of things. We 970 * use the common vc_do_resize methods to update the structures. The 971 * caller must hold the console sem to protect console internals and 972 * vc->port.tty 973 */ 974 975 int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int rows) 976 { 977 return vc_do_resize(vc->port.tty, vc, cols, rows); 978 } 979 980 /** 981 * vt_resize - resize a VT 982 * @tty: tty to resize 983 * @ws: winsize attributes 984 * 985 * Resize a virtual terminal. This is called by the tty layer as we 986 * register our own handler for resizing. The mutual helper does all 987 * the actual work. 988 * 989 * Takes the console sem and the called methods then take the tty 990 * termios_rwsem and the tty ctrl_lock in that order. 991 */ 992 static int vt_resize(struct tty_struct *tty, struct winsize *ws) 993 { 994 struct vc_data *vc = tty->driver_data; 995 int ret; 996 997 console_lock(); 998 ret = vc_do_resize(tty, vc, ws->ws_col, ws->ws_row); 999 console_unlock(); 1000 return ret; 1001 } 1002 1003 struct vc_data *vc_deallocate(unsigned int currcons) 1004 { 1005 struct vc_data *vc = NULL; 1006 1007 WARN_CONSOLE_UNLOCKED(); 1008 1009 if (vc_cons_allocated(currcons)) { 1010 struct vt_notifier_param param; 1011 1012 param.vc = vc = vc_cons[currcons].d; 1013 atomic_notifier_call_chain(&vt_notifier_list, VT_DEALLOCATE, ¶m); 1014 vcs_remove_sysfs(currcons); 1015 vc->vc_sw->con_deinit(vc); 1016 put_pid(vc->vt_pid); 1017 module_put(vc->vc_sw->owner); 1018 kfree(vc->vc_screenbuf); 1019 vc_cons[currcons].d = NULL; 1020 } 1021 return vc; 1022 } 1023 1024 /* 1025 * VT102 emulator 1026 */ 1027 1028 #define set_kbd(vc, x) vt_set_kbd_mode_bit((vc)->vc_num, (x)) 1029 #define clr_kbd(vc, x) vt_clr_kbd_mode_bit((vc)->vc_num, (x)) 1030 #define is_kbd(vc, x) vt_get_kbd_mode_bit((vc)->vc_num, (x)) 1031 1032 #define decarm VC_REPEAT 1033 #define decckm VC_CKMODE 1034 #define kbdapplic VC_APPLIC 1035 #define lnm VC_CRLF 1036 1037 /* 1038 * this is what the terminal answers to a ESC-Z or csi0c query. 1039 */ 1040 #define VT100ID "\033[?1;2c" 1041 #define VT102ID "\033[?6c" 1042 1043 const unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7, 1044 8,12,10,14, 9,13,11,15 }; 1045 1046 /* the default colour table, for VGA+ colour systems */ 1047 unsigned char default_red[] = { 1048 0x00, 0xaa, 0x00, 0xaa, 0x00, 0xaa, 0x00, 0xaa, 1049 0x55, 0xff, 0x55, 0xff, 0x55, 0xff, 0x55, 0xff 1050 }; 1051 module_param_array(default_red, byte, NULL, S_IRUGO | S_IWUSR); 1052 1053 unsigned char default_grn[] = { 1054 0x00, 0x00, 0xaa, 0x55, 0x00, 0x00, 0xaa, 0xaa, 1055 0x55, 0x55, 0xff, 0xff, 0x55, 0x55, 0xff, 0xff 1056 }; 1057 module_param_array(default_grn, byte, NULL, S_IRUGO | S_IWUSR); 1058 1059 unsigned char default_blu[] = { 1060 0x00, 0x00, 0x00, 0x00, 0xaa, 0xaa, 0xaa, 0xaa, 1061 0x55, 0x55, 0x55, 0x55, 0xff, 0xff, 0xff, 0xff 1062 }; 1063 module_param_array(default_blu, byte, NULL, S_IRUGO | S_IWUSR); 1064 1065 /* 1066 * gotoxy() must verify all boundaries, because the arguments 1067 * might also be negative. If the given position is out of 1068 * bounds, the cursor is placed at the nearest margin. 1069 */ 1070 static void gotoxy(struct vc_data *vc, int new_x, int new_y) 1071 { 1072 int min_y, max_y; 1073 1074 if (new_x < 0) 1075 vc->vc_x = 0; 1076 else { 1077 if (new_x >= vc->vc_cols) 1078 vc->vc_x = vc->vc_cols - 1; 1079 else 1080 vc->vc_x = new_x; 1081 } 1082 1083 if (vc->vc_decom) { 1084 min_y = vc->vc_top; 1085 max_y = vc->vc_bottom; 1086 } else { 1087 min_y = 0; 1088 max_y = vc->vc_rows; 1089 } 1090 if (new_y < min_y) 1091 vc->vc_y = min_y; 1092 else if (new_y >= max_y) 1093 vc->vc_y = max_y - 1; 1094 else 1095 vc->vc_y = new_y; 1096 vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1); 1097 vc->vc_need_wrap = 0; 1098 } 1099 1100 /* for absolute user moves, when decom is set */ 1101 static void gotoxay(struct vc_data *vc, int new_x, int new_y) 1102 { 1103 gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y); 1104 } 1105 1106 void scrollback(struct vc_data *vc, int lines) 1107 { 1108 if (!lines) 1109 lines = vc->vc_rows / 2; 1110 scrolldelta(-lines); 1111 } 1112 1113 void scrollfront(struct vc_data *vc, int lines) 1114 { 1115 if (!lines) 1116 lines = vc->vc_rows / 2; 1117 scrolldelta(lines); 1118 } 1119 1120 static void lf(struct vc_data *vc) 1121 { 1122 /* don't scroll if above bottom of scrolling region, or 1123 * if below scrolling region 1124 */ 1125 if (vc->vc_y + 1 == vc->vc_bottom) 1126 scrup(vc, vc->vc_top, vc->vc_bottom, 1); 1127 else if (vc->vc_y < vc->vc_rows - 1) { 1128 vc->vc_y++; 1129 vc->vc_pos += vc->vc_size_row; 1130 } 1131 vc->vc_need_wrap = 0; 1132 notify_write(vc, '\n'); 1133 } 1134 1135 static void ri(struct vc_data *vc) 1136 { 1137 /* don't scroll if below top of scrolling region, or 1138 * if above scrolling region 1139 */ 1140 if (vc->vc_y == vc->vc_top) 1141 scrdown(vc, vc->vc_top, vc->vc_bottom, 1); 1142 else if (vc->vc_y > 0) { 1143 vc->vc_y--; 1144 vc->vc_pos -= vc->vc_size_row; 1145 } 1146 vc->vc_need_wrap = 0; 1147 } 1148 1149 static inline void cr(struct vc_data *vc) 1150 { 1151 vc->vc_pos -= vc->vc_x << 1; 1152 vc->vc_need_wrap = vc->vc_x = 0; 1153 notify_write(vc, '\r'); 1154 } 1155 1156 static inline void bs(struct vc_data *vc) 1157 { 1158 if (vc->vc_x) { 1159 vc->vc_pos -= 2; 1160 vc->vc_x--; 1161 vc->vc_need_wrap = 0; 1162 notify_write(vc, '\b'); 1163 } 1164 } 1165 1166 static inline void del(struct vc_data *vc) 1167 { 1168 /* ignored */ 1169 } 1170 1171 static void csi_J(struct vc_data *vc, int vpar) 1172 { 1173 unsigned int count; 1174 unsigned short * start; 1175 1176 switch (vpar) { 1177 case 0: /* erase from cursor to end of display */ 1178 count = (vc->vc_scr_end - vc->vc_pos) >> 1; 1179 start = (unsigned short *)vc->vc_pos; 1180 break; 1181 case 1: /* erase from start to cursor */ 1182 count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1; 1183 start = (unsigned short *)vc->vc_origin; 1184 break; 1185 case 3: /* erase scroll-back buffer (and whole display) */ 1186 scr_memsetw(vc->vc_screenbuf, vc->vc_video_erase_char, 1187 vc->vc_screenbuf_size >> 1); 1188 set_origin(vc); 1189 if (CON_IS_VISIBLE(vc)) 1190 update_screen(vc); 1191 /* fall through */ 1192 case 2: /* erase whole display */ 1193 count = vc->vc_cols * vc->vc_rows; 1194 start = (unsigned short *)vc->vc_origin; 1195 break; 1196 default: 1197 return; 1198 } 1199 scr_memsetw(start, vc->vc_video_erase_char, 2 * count); 1200 if (DO_UPDATE(vc)) 1201 do_update_region(vc, (unsigned long) start, count); 1202 vc->vc_need_wrap = 0; 1203 } 1204 1205 static void csi_K(struct vc_data *vc, int vpar) 1206 { 1207 unsigned int count; 1208 unsigned short * start; 1209 1210 switch (vpar) { 1211 case 0: /* erase from cursor to end of line */ 1212 count = vc->vc_cols - vc->vc_x; 1213 start = (unsigned short *)vc->vc_pos; 1214 break; 1215 case 1: /* erase from start of line to cursor */ 1216 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1)); 1217 count = vc->vc_x + 1; 1218 break; 1219 case 2: /* erase whole line */ 1220 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1)); 1221 count = vc->vc_cols; 1222 break; 1223 default: 1224 return; 1225 } 1226 scr_memsetw(start, vc->vc_video_erase_char, 2 * count); 1227 vc->vc_need_wrap = 0; 1228 if (DO_UPDATE(vc)) 1229 do_update_region(vc, (unsigned long) start, count); 1230 } 1231 1232 static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */ 1233 { /* not vt100? */ 1234 int count; 1235 1236 if (!vpar) 1237 vpar++; 1238 count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar; 1239 1240 scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count); 1241 if (DO_UPDATE(vc)) 1242 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count); 1243 vc->vc_need_wrap = 0; 1244 } 1245 1246 static void default_attr(struct vc_data *vc) 1247 { 1248 vc->vc_intensity = 1; 1249 vc->vc_italic = 0; 1250 vc->vc_underline = 0; 1251 vc->vc_reverse = 0; 1252 vc->vc_blink = 0; 1253 vc->vc_color = vc->vc_def_color; 1254 } 1255 1256 struct rgb { u8 r; u8 g; u8 b; }; 1257 1258 static struct rgb rgb_from_256(int i) 1259 { 1260 struct rgb c; 1261 if (i < 8) { /* Standard colours. */ 1262 c.r = i&1 ? 0xaa : 0x00; 1263 c.g = i&2 ? 0xaa : 0x00; 1264 c.b = i&4 ? 0xaa : 0x00; 1265 } else if (i < 16) { 1266 c.r = i&1 ? 0xff : 0x55; 1267 c.g = i&2 ? 0xff : 0x55; 1268 c.b = i&4 ? 0xff : 0x55; 1269 } else if (i < 232) { /* 6x6x6 colour cube. */ 1270 c.r = (i - 16) / 36 * 85 / 2; 1271 c.g = (i - 16) / 6 % 6 * 85 / 2; 1272 c.b = (i - 16) % 6 * 85 / 2; 1273 } else /* Grayscale ramp. */ 1274 c.r = c.g = c.b = i * 10 - 2312; 1275 return c; 1276 } 1277 1278 static void rgb_foreground(struct vc_data *vc, struct rgb c) 1279 { 1280 u8 hue, max = c.r; 1281 if (c.g > max) 1282 max = c.g; 1283 if (c.b > max) 1284 max = c.b; 1285 hue = (c.r > max/2 ? 4 : 0) 1286 | (c.g > max/2 ? 2 : 0) 1287 | (c.b > max/2 ? 1 : 0); 1288 if (hue == 7 && max <= 0x55) 1289 hue = 0, vc->vc_intensity = 2; 1290 else 1291 vc->vc_intensity = (max > 0xaa) + 1; 1292 vc->vc_color = (vc->vc_color & 0xf0) | hue; 1293 } 1294 1295 static void rgb_background(struct vc_data *vc, 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 /* console_lock is held */ 1303 static void csi_m(struct vc_data *vc) 1304 { 1305 int i; 1306 1307 for (i = 0; i <= vc->vc_npar; i++) 1308 switch (vc->vc_par[i]) { 1309 case 0: /* all attributes off */ 1310 default_attr(vc); 1311 break; 1312 case 1: 1313 vc->vc_intensity = 2; 1314 break; 1315 case 2: 1316 vc->vc_intensity = 0; 1317 break; 1318 case 3: 1319 vc->vc_italic = 1; 1320 break; 1321 case 4: 1322 vc->vc_underline = 1; 1323 break; 1324 case 5: 1325 vc->vc_blink = 1; 1326 break; 1327 case 7: 1328 vc->vc_reverse = 1; 1329 break; 1330 case 10: /* ANSI X3.64-1979 (SCO-ish?) 1331 * Select primary font, don't display 1332 * control chars if defined, don't set 1333 * bit 8 on output. 1334 */ 1335 vc->vc_translate = set_translate(vc->vc_charset == 0 1336 ? vc->vc_G0_charset 1337 : vc->vc_G1_charset, vc); 1338 vc->vc_disp_ctrl = 0; 1339 vc->vc_toggle_meta = 0; 1340 break; 1341 case 11: /* ANSI X3.64-1979 (SCO-ish?) 1342 * Select first alternate font, lets 1343 * chars < 32 be displayed as ROM chars. 1344 */ 1345 vc->vc_translate = set_translate(IBMPC_MAP, vc); 1346 vc->vc_disp_ctrl = 1; 1347 vc->vc_toggle_meta = 0; 1348 break; 1349 case 12: /* ANSI X3.64-1979 (SCO-ish?) 1350 * Select second alternate font, toggle 1351 * high bit before displaying as ROM char. 1352 */ 1353 vc->vc_translate = set_translate(IBMPC_MAP, vc); 1354 vc->vc_disp_ctrl = 1; 1355 vc->vc_toggle_meta = 1; 1356 break; 1357 case 21: 1358 case 22: 1359 vc->vc_intensity = 1; 1360 break; 1361 case 23: 1362 vc->vc_italic = 0; 1363 break; 1364 case 24: 1365 vc->vc_underline = 0; 1366 break; 1367 case 25: 1368 vc->vc_blink = 0; 1369 break; 1370 case 27: 1371 vc->vc_reverse = 0; 1372 break; 1373 case 38: /* ITU T.416 1374 * Higher colour modes. 1375 * They break the usual properties of SGR codes 1376 * and thus need to be detected and ignored by 1377 * hand. Strictly speaking, that standard also 1378 * wants : rather than ; as separators, contrary 1379 * to ECMA-48, but no one produces such codes 1380 * and almost no one accepts them. 1381 */ 1382 i++; 1383 if (i > vc->vc_npar) 1384 break; 1385 if (vc->vc_par[i] == 5 && /* 256 colours */ 1386 i < vc->vc_npar) { /* ubiquitous */ 1387 i++; 1388 rgb_foreground(vc, 1389 rgb_from_256(vc->vc_par[i])); 1390 } else if (vc->vc_par[i] == 2 && /* 24 bit */ 1391 i <= vc->vc_npar + 3) {/* extremely rare */ 1392 struct rgb c = { 1393 .r = vc->vc_par[i + 1], 1394 .g = vc->vc_par[i + 2], 1395 .b = vc->vc_par[i + 3], 1396 }; 1397 rgb_foreground(vc, c); 1398 i += 3; 1399 } 1400 /* Subcommands 3 (CMY) and 4 (CMYK) are so insane 1401 * there's no point in supporting them. 1402 */ 1403 break; 1404 case 48: 1405 i++; 1406 if (i > vc->vc_npar) 1407 break; 1408 if (vc->vc_par[i] == 5 && /* 256 colours */ 1409 i < vc->vc_npar) { 1410 i++; 1411 rgb_background(vc, 1412 rgb_from_256(vc->vc_par[i])); 1413 } else if (vc->vc_par[i] == 2 && /* 24 bit */ 1414 i <= vc->vc_npar + 3) { 1415 struct rgb c = { 1416 .r = vc->vc_par[i + 1], 1417 .g = vc->vc_par[i + 2], 1418 .b = vc->vc_par[i + 3], 1419 }; 1420 rgb_background(vc, c); 1421 i += 3; 1422 } 1423 break; 1424 case 39: 1425 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0); 1426 break; 1427 case 49: 1428 vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f); 1429 break; 1430 default: 1431 if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37) 1432 vc->vc_color = color_table[vc->vc_par[i] - 30] 1433 | (vc->vc_color & 0xf0); 1434 else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47) 1435 vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4) 1436 | (vc->vc_color & 0x0f); 1437 break; 1438 } 1439 update_attr(vc); 1440 } 1441 1442 static void respond_string(const char *p, struct tty_port *port) 1443 { 1444 while (*p) { 1445 tty_insert_flip_char(port, *p, 0); 1446 p++; 1447 } 1448 tty_schedule_flip(port); 1449 } 1450 1451 static void cursor_report(struct vc_data *vc, struct tty_struct *tty) 1452 { 1453 char buf[40]; 1454 1455 sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1); 1456 respond_string(buf, tty->port); 1457 } 1458 1459 static inline void status_report(struct tty_struct *tty) 1460 { 1461 respond_string("\033[0n", tty->port); /* Terminal ok */ 1462 } 1463 1464 static inline void respond_ID(struct tty_struct *tty) 1465 { 1466 respond_string(VT102ID, tty->port); 1467 } 1468 1469 void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry) 1470 { 1471 char buf[8]; 1472 1473 sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx), 1474 (char)('!' + mry)); 1475 respond_string(buf, tty->port); 1476 } 1477 1478 /* invoked via ioctl(TIOCLINUX) and through set_selection */ 1479 int mouse_reporting(void) 1480 { 1481 return vc_cons[fg_console].d->vc_report_mouse; 1482 } 1483 1484 /* console_lock is held */ 1485 static void set_mode(struct vc_data *vc, int on_off) 1486 { 1487 int i; 1488 1489 for (i = 0; i <= vc->vc_npar; i++) 1490 if (vc->vc_ques) { 1491 switch(vc->vc_par[i]) { /* DEC private modes set/reset */ 1492 case 1: /* Cursor keys send ^[Ox/^[[x */ 1493 if (on_off) 1494 set_kbd(vc, decckm); 1495 else 1496 clr_kbd(vc, decckm); 1497 break; 1498 case 3: /* 80/132 mode switch unimplemented */ 1499 vc->vc_deccolm = on_off; 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 scrdown(vc, vc->vc_y, vc->vc_bottom, 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 scrup(vc, vc->vc_y, vc->vc_bottom, 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] = 0x01010100; 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[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[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[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 bisearch(uint32_t ucs, const struct interval *table, int max) 2152 { 2153 int min = 0; 2154 int mid; 2155 2156 if (ucs < table[0].first || ucs > table[max].last) 2157 return 0; 2158 while (max >= min) { 2159 mid = (min + max) / 2; 2160 if (ucs > table[mid].last) 2161 min = mid + 1; 2162 else if (ucs < table[mid].first) 2163 max = mid - 1; 2164 else 2165 return 1; 2166 } 2167 return 0; 2168 } 2169 2170 static int is_double_width(uint32_t ucs) 2171 { 2172 static const struct interval double_width[] = { 2173 { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E }, 2174 { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF }, 2175 { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 }, 2176 { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD } 2177 }; 2178 return bisearch(ucs, double_width, ARRAY_SIZE(double_width) - 1); 2179 } 2180 2181 /* acquires console_lock */ 2182 static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count) 2183 { 2184 #ifdef VT_BUF_VRAM_ONLY 2185 #define FLUSH do { } while(0); 2186 #else 2187 #define FLUSH if (draw_x >= 0) { \ 2188 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \ 2189 draw_x = -1; \ 2190 } 2191 #endif 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 printk(KERN_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 (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 FLUSH 2385 } 2386 2387 while (1) { 2388 if (vc->vc_need_wrap || vc->vc_decim) 2389 FLUSH 2390 if (vc->vc_need_wrap) { 2391 cr(vc); 2392 lf(vc); 2393 } 2394 if (vc->vc_decim) 2395 insert_char(vc, 1); 2396 scr_writew(himask ? 2397 ((vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) : 2398 (vc_attr << 8) + tc, 2399 (u16 *) vc->vc_pos); 2400 if (DO_UPDATE(vc) && draw_x < 0) { 2401 draw_x = vc->vc_x; 2402 draw_from = vc->vc_pos; 2403 } 2404 if (vc->vc_x == vc->vc_cols - 1) { 2405 vc->vc_need_wrap = vc->vc_decawm; 2406 draw_to = vc->vc_pos + 2; 2407 } else { 2408 vc->vc_x++; 2409 draw_to = (vc->vc_pos += 2); 2410 } 2411 2412 if (!--width) break; 2413 2414 tc = conv_uni_to_pc(vc, ' '); /* A space is printed in the second column */ 2415 if (tc < 0) tc = ' '; 2416 } 2417 notify_write(vc, c); 2418 2419 if (inverse) { 2420 FLUSH 2421 } 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 FLUSH 2433 do_con_trol(tty, vc, orig); 2434 } 2435 FLUSH 2436 console_conditional_schedule(); 2437 console_unlock(); 2438 notify_update(vc); 2439 return n; 2440 #undef FLUSH 2441 } 2442 2443 /* 2444 * This is the console switching callback. 2445 * 2446 * Doing console switching in a process context allows 2447 * us to do the switches asynchronously (needed when we want 2448 * to switch due to a keyboard interrupt). Synchronization 2449 * with other console code and prevention of re-entrancy is 2450 * ensured with console_lock. 2451 */ 2452 static void console_callback(struct work_struct *ignored) 2453 { 2454 console_lock(); 2455 2456 if (want_console >= 0) { 2457 if (want_console != fg_console && 2458 vc_cons_allocated(want_console)) { 2459 hide_cursor(vc_cons[fg_console].d); 2460 change_console(vc_cons[want_console].d); 2461 /* we only changed when the console had already 2462 been allocated - a new console is not created 2463 in an interrupt routine */ 2464 } 2465 want_console = -1; 2466 } 2467 if (do_poke_blanked_console) { /* do not unblank for a LED change */ 2468 do_poke_blanked_console = 0; 2469 poke_blanked_console(); 2470 } 2471 if (scrollback_delta) { 2472 struct vc_data *vc = vc_cons[fg_console].d; 2473 clear_selection(); 2474 if (vc->vc_mode == KD_TEXT) 2475 vc->vc_sw->con_scrolldelta(vc, scrollback_delta); 2476 scrollback_delta = 0; 2477 } 2478 if (blank_timer_expired) { 2479 do_blank_screen(0); 2480 blank_timer_expired = 0; 2481 } 2482 notify_update(vc_cons[fg_console].d); 2483 2484 console_unlock(); 2485 } 2486 2487 int set_console(int nr) 2488 { 2489 struct vc_data *vc = vc_cons[fg_console].d; 2490 2491 if (!vc_cons_allocated(nr) || vt_dont_switch || 2492 (vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) { 2493 2494 /* 2495 * Console switch will fail in console_callback() or 2496 * change_console() so there is no point scheduling 2497 * the callback 2498 * 2499 * Existing set_console() users don't check the return 2500 * value so this shouldn't break anything 2501 */ 2502 return -EINVAL; 2503 } 2504 2505 want_console = nr; 2506 schedule_console_callback(); 2507 2508 return 0; 2509 } 2510 2511 struct tty_driver *console_driver; 2512 2513 #ifdef CONFIG_VT_CONSOLE 2514 2515 /** 2516 * vt_kmsg_redirect() - Sets/gets the kernel message console 2517 * @new: The new virtual terminal number or -1 if the console should stay 2518 * unchanged 2519 * 2520 * By default, the kernel messages are always printed on the current virtual 2521 * console. However, the user may modify that default with the 2522 * TIOCL_SETKMSGREDIRECT ioctl call. 2523 * 2524 * This function sets the kernel message console to be @new. It returns the old 2525 * virtual console number. The virtual terminal number 0 (both as parameter and 2526 * return value) means no redirection (i.e. always printed on the currently 2527 * active console). 2528 * 2529 * The parameter -1 means that only the current console is returned, but the 2530 * value is not modified. You may use the macro vt_get_kmsg_redirect() in that 2531 * case to make the code more understandable. 2532 * 2533 * When the kernel is compiled without CONFIG_VT_CONSOLE, this function ignores 2534 * the parameter and always returns 0. 2535 */ 2536 int vt_kmsg_redirect(int new) 2537 { 2538 static int kmsg_con; 2539 2540 if (new != -1) 2541 return xchg(&kmsg_con, new); 2542 else 2543 return kmsg_con; 2544 } 2545 2546 /* 2547 * Console on virtual terminal 2548 * 2549 * The console must be locked when we get here. 2550 */ 2551 2552 static void vt_console_print(struct console *co, const char *b, unsigned count) 2553 { 2554 struct vc_data *vc = vc_cons[fg_console].d; 2555 unsigned char c; 2556 static DEFINE_SPINLOCK(printing_lock); 2557 const ushort *start; 2558 ushort cnt = 0; 2559 ushort myx; 2560 int kmsg_console; 2561 2562 /* console busy or not yet initialized */ 2563 if (!printable) 2564 return; 2565 if (!spin_trylock(&printing_lock)) 2566 return; 2567 2568 kmsg_console = vt_get_kmsg_redirect(); 2569 if (kmsg_console && vc_cons_allocated(kmsg_console - 1)) 2570 vc = vc_cons[kmsg_console - 1].d; 2571 2572 /* read `x' only after setting currcons properly (otherwise 2573 the `x' macro will read the x of the foreground console). */ 2574 myx = vc->vc_x; 2575 2576 if (!vc_cons_allocated(fg_console)) { 2577 /* impossible */ 2578 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */ 2579 goto quit; 2580 } 2581 2582 if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc)) 2583 goto quit; 2584 2585 /* undraw cursor first */ 2586 if (IS_FG(vc)) 2587 hide_cursor(vc); 2588 2589 start = (ushort *)vc->vc_pos; 2590 2591 /* Contrived structure to try to emulate original need_wrap behaviour 2592 * Problems caused when we have need_wrap set on '\n' character */ 2593 while (count--) { 2594 c = *b++; 2595 if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) { 2596 if (cnt > 0) { 2597 if (CON_IS_VISIBLE(vc)) 2598 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x); 2599 vc->vc_x += cnt; 2600 if (vc->vc_need_wrap) 2601 vc->vc_x--; 2602 cnt = 0; 2603 } 2604 if (c == 8) { /* backspace */ 2605 bs(vc); 2606 start = (ushort *)vc->vc_pos; 2607 myx = vc->vc_x; 2608 continue; 2609 } 2610 if (c != 13) 2611 lf(vc); 2612 cr(vc); 2613 start = (ushort *)vc->vc_pos; 2614 myx = vc->vc_x; 2615 if (c == 10 || c == 13) 2616 continue; 2617 } 2618 scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos); 2619 notify_write(vc, c); 2620 cnt++; 2621 if (myx == vc->vc_cols - 1) { 2622 vc->vc_need_wrap = 1; 2623 continue; 2624 } 2625 vc->vc_pos += 2; 2626 myx++; 2627 } 2628 if (cnt > 0) { 2629 if (CON_IS_VISIBLE(vc)) 2630 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x); 2631 vc->vc_x += cnt; 2632 if (vc->vc_x == vc->vc_cols) { 2633 vc->vc_x--; 2634 vc->vc_need_wrap = 1; 2635 } 2636 } 2637 set_cursor(vc); 2638 notify_update(vc); 2639 2640 quit: 2641 spin_unlock(&printing_lock); 2642 } 2643 2644 static struct tty_driver *vt_console_device(struct console *c, int *index) 2645 { 2646 *index = c->index ? c->index-1 : fg_console; 2647 return console_driver; 2648 } 2649 2650 static struct console vt_console_driver = { 2651 .name = "tty", 2652 .write = vt_console_print, 2653 .device = vt_console_device, 2654 .unblank = unblank_screen, 2655 .flags = CON_PRINTBUFFER, 2656 .index = -1, 2657 }; 2658 #endif 2659 2660 /* 2661 * Handling of Linux-specific VC ioctls 2662 */ 2663 2664 /* 2665 * Generally a bit racy with respect to console_lock();. 2666 * 2667 * There are some functions which don't need it. 2668 * 2669 * There are some functions which can sleep for arbitrary periods 2670 * (paste_selection) but we don't need the lock there anyway. 2671 * 2672 * set_selection has locking, and definitely needs it 2673 */ 2674 2675 int tioclinux(struct tty_struct *tty, unsigned long arg) 2676 { 2677 char type, data; 2678 char __user *p = (char __user *)arg; 2679 int lines; 2680 int ret; 2681 2682 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN)) 2683 return -EPERM; 2684 if (get_user(type, p)) 2685 return -EFAULT; 2686 ret = 0; 2687 2688 switch (type) 2689 { 2690 case TIOCL_SETSEL: 2691 console_lock(); 2692 ret = set_selection((struct tiocl_selection __user *)(p+1), tty); 2693 console_unlock(); 2694 break; 2695 case TIOCL_PASTESEL: 2696 ret = paste_selection(tty); 2697 break; 2698 case TIOCL_UNBLANKSCREEN: 2699 console_lock(); 2700 unblank_screen(); 2701 console_unlock(); 2702 break; 2703 case TIOCL_SELLOADLUT: 2704 console_lock(); 2705 ret = sel_loadlut(p); 2706 console_unlock(); 2707 break; 2708 case TIOCL_GETSHIFTSTATE: 2709 2710 /* 2711 * Make it possible to react to Shift+Mousebutton. 2712 * Note that 'shift_state' is an undocumented 2713 * kernel-internal variable; programs not closely 2714 * related to the kernel should not use this. 2715 */ 2716 data = vt_get_shift_state(); 2717 ret = __put_user(data, p); 2718 break; 2719 case TIOCL_GETMOUSEREPORTING: 2720 console_lock(); /* May be overkill */ 2721 data = mouse_reporting(); 2722 console_unlock(); 2723 ret = __put_user(data, p); 2724 break; 2725 case TIOCL_SETVESABLANK: 2726 console_lock(); 2727 ret = set_vesa_blanking(p); 2728 console_unlock(); 2729 break; 2730 case TIOCL_GETKMSGREDIRECT: 2731 data = vt_get_kmsg_redirect(); 2732 ret = __put_user(data, p); 2733 break; 2734 case TIOCL_SETKMSGREDIRECT: 2735 if (!capable(CAP_SYS_ADMIN)) { 2736 ret = -EPERM; 2737 } else { 2738 if (get_user(data, p+1)) 2739 ret = -EFAULT; 2740 else 2741 vt_kmsg_redirect(data); 2742 } 2743 break; 2744 case TIOCL_GETFGCONSOLE: 2745 /* No locking needed as this is a transiently 2746 correct return anyway if the caller hasn't 2747 disabled switching */ 2748 ret = fg_console; 2749 break; 2750 case TIOCL_SCROLLCONSOLE: 2751 if (get_user(lines, (s32 __user *)(p+4))) { 2752 ret = -EFAULT; 2753 } else { 2754 /* Need the console lock here. Note that lots 2755 of other calls need fixing before the lock 2756 is actually useful ! */ 2757 console_lock(); 2758 scrollfront(vc_cons[fg_console].d, lines); 2759 console_unlock(); 2760 ret = 0; 2761 } 2762 break; 2763 case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */ 2764 console_lock(); 2765 ignore_poke = 1; 2766 do_blank_screen(0); 2767 console_unlock(); 2768 break; 2769 case TIOCL_BLANKEDSCREEN: 2770 ret = console_blanked; 2771 break; 2772 default: 2773 ret = -EINVAL; 2774 break; 2775 } 2776 return ret; 2777 } 2778 2779 /* 2780 * /dev/ttyN handling 2781 */ 2782 2783 static int con_write(struct tty_struct *tty, const unsigned char *buf, int count) 2784 { 2785 int retval; 2786 2787 retval = do_con_write(tty, buf, count); 2788 con_flush_chars(tty); 2789 2790 return retval; 2791 } 2792 2793 static int con_put_char(struct tty_struct *tty, unsigned char ch) 2794 { 2795 if (in_interrupt()) 2796 return 0; /* n_r3964 calls put_char() from interrupt context */ 2797 return do_con_write(tty, &ch, 1); 2798 } 2799 2800 static int con_write_room(struct tty_struct *tty) 2801 { 2802 if (tty->stopped) 2803 return 0; 2804 return 32768; /* No limit, really; we're not buffering */ 2805 } 2806 2807 static int con_chars_in_buffer(struct tty_struct *tty) 2808 { 2809 return 0; /* we're not buffering */ 2810 } 2811 2812 /* 2813 * con_throttle and con_unthrottle are only used for 2814 * paste_selection(), which has to stuff in a large number of 2815 * characters... 2816 */ 2817 static void con_throttle(struct tty_struct *tty) 2818 { 2819 } 2820 2821 static void con_unthrottle(struct tty_struct *tty) 2822 { 2823 struct vc_data *vc = tty->driver_data; 2824 2825 wake_up_interruptible(&vc->paste_wait); 2826 } 2827 2828 /* 2829 * Turn the Scroll-Lock LED on when the tty is stopped 2830 */ 2831 static void con_stop(struct tty_struct *tty) 2832 { 2833 int console_num; 2834 if (!tty) 2835 return; 2836 console_num = tty->index; 2837 if (!vc_cons_allocated(console_num)) 2838 return; 2839 vt_kbd_con_stop(console_num); 2840 } 2841 2842 /* 2843 * Turn the Scroll-Lock LED off when the console is started 2844 */ 2845 static void con_start(struct tty_struct *tty) 2846 { 2847 int console_num; 2848 if (!tty) 2849 return; 2850 console_num = tty->index; 2851 if (!vc_cons_allocated(console_num)) 2852 return; 2853 vt_kbd_con_start(console_num); 2854 } 2855 2856 static void con_flush_chars(struct tty_struct *tty) 2857 { 2858 struct vc_data *vc; 2859 2860 if (in_interrupt()) /* from flush_to_ldisc */ 2861 return; 2862 2863 /* if we race with con_close(), vt may be null */ 2864 console_lock(); 2865 vc = tty->driver_data; 2866 if (vc) 2867 set_cursor(vc); 2868 console_unlock(); 2869 } 2870 2871 /* 2872 * Allocate the console screen memory. 2873 */ 2874 static int con_install(struct tty_driver *driver, struct tty_struct *tty) 2875 { 2876 unsigned int currcons = tty->index; 2877 struct vc_data *vc; 2878 int ret; 2879 2880 console_lock(); 2881 ret = vc_allocate(currcons); 2882 if (ret) 2883 goto unlock; 2884 2885 vc = vc_cons[currcons].d; 2886 2887 /* Still being freed */ 2888 if (vc->port.tty) { 2889 ret = -ERESTARTSYS; 2890 goto unlock; 2891 } 2892 2893 ret = tty_port_install(&vc->port, driver, tty); 2894 if (ret) 2895 goto unlock; 2896 2897 tty->driver_data = vc; 2898 vc->port.tty = tty; 2899 2900 if (!tty->winsize.ws_row && !tty->winsize.ws_col) { 2901 tty->winsize.ws_row = vc_cons[currcons].d->vc_rows; 2902 tty->winsize.ws_col = vc_cons[currcons].d->vc_cols; 2903 } 2904 if (vc->vc_utf) 2905 tty->termios.c_iflag |= IUTF8; 2906 else 2907 tty->termios.c_iflag &= ~IUTF8; 2908 unlock: 2909 console_unlock(); 2910 return ret; 2911 } 2912 2913 static int con_open(struct tty_struct *tty, struct file *filp) 2914 { 2915 /* everything done in install */ 2916 return 0; 2917 } 2918 2919 2920 static void con_close(struct tty_struct *tty, struct file *filp) 2921 { 2922 /* Nothing to do - we defer to shutdown */ 2923 } 2924 2925 static void con_shutdown(struct tty_struct *tty) 2926 { 2927 struct vc_data *vc = tty->driver_data; 2928 BUG_ON(vc == NULL); 2929 console_lock(); 2930 vc->port.tty = NULL; 2931 console_unlock(); 2932 } 2933 2934 static int default_color = 7; /* white */ 2935 static int default_italic_color = 2; // green (ASCII) 2936 static int default_underline_color = 3; // cyan (ASCII) 2937 module_param_named(color, default_color, int, S_IRUGO | S_IWUSR); 2938 module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR); 2939 module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR); 2940 2941 static void vc_init(struct vc_data *vc, unsigned int rows, 2942 unsigned int cols, int do_clear) 2943 { 2944 int j, k ; 2945 2946 vc->vc_cols = cols; 2947 vc->vc_rows = rows; 2948 vc->vc_size_row = cols << 1; 2949 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row; 2950 2951 set_origin(vc); 2952 vc->vc_pos = vc->vc_origin; 2953 reset_vc(vc); 2954 for (j=k=0; j<16; j++) { 2955 vc->vc_palette[k++] = default_red[j] ; 2956 vc->vc_palette[k++] = default_grn[j] ; 2957 vc->vc_palette[k++] = default_blu[j] ; 2958 } 2959 vc->vc_def_color = default_color; 2960 vc->vc_ulcolor = default_underline_color; 2961 vc->vc_itcolor = default_italic_color; 2962 vc->vc_halfcolor = 0x08; /* grey */ 2963 init_waitqueue_head(&vc->paste_wait); 2964 reset_terminal(vc, do_clear); 2965 } 2966 2967 /* 2968 * This routine initializes console interrupts, and does nothing 2969 * else. If you want the screen to clear, call tty_write with 2970 * the appropriate escape-sequence. 2971 */ 2972 2973 static int __init con_init(void) 2974 { 2975 const char *display_desc = NULL; 2976 struct vc_data *vc; 2977 unsigned int currcons = 0, i; 2978 2979 console_lock(); 2980 2981 if (conswitchp) 2982 display_desc = conswitchp->con_startup(); 2983 if (!display_desc) { 2984 fg_console = 0; 2985 console_unlock(); 2986 return 0; 2987 } 2988 2989 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 2990 struct con_driver *con_driver = ®istered_con_driver[i]; 2991 2992 if (con_driver->con == NULL) { 2993 con_driver->con = conswitchp; 2994 con_driver->desc = display_desc; 2995 con_driver->flag = CON_DRIVER_FLAG_INIT; 2996 con_driver->first = 0; 2997 con_driver->last = MAX_NR_CONSOLES - 1; 2998 break; 2999 } 3000 } 3001 3002 for (i = 0; i < MAX_NR_CONSOLES; i++) 3003 con_driver_map[i] = conswitchp; 3004 3005 if (blankinterval) { 3006 blank_state = blank_normal_wait; 3007 mod_timer(&console_timer, jiffies + (blankinterval * HZ)); 3008 } 3009 3010 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) { 3011 vc_cons[currcons].d = vc = kzalloc(sizeof(struct vc_data), GFP_NOWAIT); 3012 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK); 3013 tty_port_init(&vc->port); 3014 visual_init(vc, currcons, 1); 3015 vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_NOWAIT); 3016 vc_init(vc, vc->vc_rows, vc->vc_cols, 3017 currcons || !vc->vc_sw->con_save_screen); 3018 } 3019 currcons = fg_console = 0; 3020 master_display_fg = vc = vc_cons[currcons].d; 3021 set_origin(vc); 3022 save_screen(vc); 3023 gotoxy(vc, vc->vc_x, vc->vc_y); 3024 csi_J(vc, 0); 3025 update_screen(vc); 3026 pr_info("Console: %s %s %dx%d\n", 3027 vc->vc_can_do_color ? "colour" : "mono", 3028 display_desc, vc->vc_cols, vc->vc_rows); 3029 printable = 1; 3030 3031 console_unlock(); 3032 3033 #ifdef CONFIG_VT_CONSOLE 3034 register_console(&vt_console_driver); 3035 #endif 3036 return 0; 3037 } 3038 console_initcall(con_init); 3039 3040 static const struct tty_operations con_ops = { 3041 .install = con_install, 3042 .open = con_open, 3043 .close = con_close, 3044 .write = con_write, 3045 .write_room = con_write_room, 3046 .put_char = con_put_char, 3047 .flush_chars = con_flush_chars, 3048 .chars_in_buffer = con_chars_in_buffer, 3049 .ioctl = vt_ioctl, 3050 #ifdef CONFIG_COMPAT 3051 .compat_ioctl = vt_compat_ioctl, 3052 #endif 3053 .stop = con_stop, 3054 .start = con_start, 3055 .throttle = con_throttle, 3056 .unthrottle = con_unthrottle, 3057 .resize = vt_resize, 3058 .shutdown = con_shutdown 3059 }; 3060 3061 static struct cdev vc0_cdev; 3062 3063 static ssize_t show_tty_active(struct device *dev, 3064 struct device_attribute *attr, char *buf) 3065 { 3066 return sprintf(buf, "tty%d\n", fg_console + 1); 3067 } 3068 static DEVICE_ATTR(active, S_IRUGO, show_tty_active, NULL); 3069 3070 static struct attribute *vt_dev_attrs[] = { 3071 &dev_attr_active.attr, 3072 NULL 3073 }; 3074 3075 ATTRIBUTE_GROUPS(vt_dev); 3076 3077 int __init vty_init(const struct file_operations *console_fops) 3078 { 3079 cdev_init(&vc0_cdev, console_fops); 3080 if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) || 3081 register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0) 3082 panic("Couldn't register /dev/tty0 driver\n"); 3083 tty0dev = device_create_with_groups(tty_class, NULL, 3084 MKDEV(TTY_MAJOR, 0), NULL, 3085 vt_dev_groups, "tty0"); 3086 if (IS_ERR(tty0dev)) 3087 tty0dev = NULL; 3088 3089 vcs_init(); 3090 3091 console_driver = alloc_tty_driver(MAX_NR_CONSOLES); 3092 if (!console_driver) 3093 panic("Couldn't allocate console driver\n"); 3094 3095 console_driver->name = "tty"; 3096 console_driver->name_base = 1; 3097 console_driver->major = TTY_MAJOR; 3098 console_driver->minor_start = 1; 3099 console_driver->type = TTY_DRIVER_TYPE_CONSOLE; 3100 console_driver->init_termios = tty_std_termios; 3101 if (default_utf8) 3102 console_driver->init_termios.c_iflag |= IUTF8; 3103 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS; 3104 tty_set_operations(console_driver, &con_ops); 3105 if (tty_register_driver(console_driver)) 3106 panic("Couldn't register console driver\n"); 3107 kbd_init(); 3108 console_map_init(); 3109 #ifdef CONFIG_MDA_CONSOLE 3110 mda_console_init(); 3111 #endif 3112 return 0; 3113 } 3114 3115 #ifndef VT_SINGLE_DRIVER 3116 3117 static struct class *vtconsole_class; 3118 3119 static int do_bind_con_driver(const struct consw *csw, int first, int last, 3120 int deflt) 3121 { 3122 struct module *owner = csw->owner; 3123 const char *desc = NULL; 3124 struct con_driver *con_driver; 3125 int i, j = -1, k = -1, retval = -ENODEV; 3126 3127 if (!try_module_get(owner)) 3128 return -ENODEV; 3129 3130 WARN_CONSOLE_UNLOCKED(); 3131 3132 /* check if driver is registered */ 3133 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3134 con_driver = ®istered_con_driver[i]; 3135 3136 if (con_driver->con == csw) { 3137 desc = con_driver->desc; 3138 retval = 0; 3139 break; 3140 } 3141 } 3142 3143 if (retval) 3144 goto err; 3145 3146 if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) { 3147 csw->con_startup(); 3148 con_driver->flag |= CON_DRIVER_FLAG_INIT; 3149 } 3150 3151 if (deflt) { 3152 if (conswitchp) 3153 module_put(conswitchp->owner); 3154 3155 __module_get(owner); 3156 conswitchp = csw; 3157 } 3158 3159 first = max(first, con_driver->first); 3160 last = min(last, con_driver->last); 3161 3162 for (i = first; i <= last; i++) { 3163 int old_was_color; 3164 struct vc_data *vc = vc_cons[i].d; 3165 3166 if (con_driver_map[i]) 3167 module_put(con_driver_map[i]->owner); 3168 __module_get(owner); 3169 con_driver_map[i] = csw; 3170 3171 if (!vc || !vc->vc_sw) 3172 continue; 3173 3174 j = i; 3175 3176 if (CON_IS_VISIBLE(vc)) { 3177 k = i; 3178 save_screen(vc); 3179 } 3180 3181 old_was_color = vc->vc_can_do_color; 3182 vc->vc_sw->con_deinit(vc); 3183 vc->vc_origin = (unsigned long)vc->vc_screenbuf; 3184 visual_init(vc, i, 0); 3185 set_origin(vc); 3186 update_attr(vc); 3187 3188 /* If the console changed between mono <-> color, then 3189 * the attributes in the screenbuf will be wrong. The 3190 * following resets all attributes to something sane. 3191 */ 3192 if (old_was_color != vc->vc_can_do_color) 3193 clear_buffer_attributes(vc); 3194 } 3195 3196 pr_info("Console: switching "); 3197 if (!deflt) 3198 printk("consoles %d-%d ", first+1, last+1); 3199 if (j >= 0) { 3200 struct vc_data *vc = vc_cons[j].d; 3201 3202 printk("to %s %s %dx%d\n", 3203 vc->vc_can_do_color ? "colour" : "mono", 3204 desc, vc->vc_cols, vc->vc_rows); 3205 3206 if (k >= 0) { 3207 vc = vc_cons[k].d; 3208 update_screen(vc); 3209 } 3210 } else 3211 printk("to %s\n", desc); 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 printk(KERN_WARNING "Unable to create device for %s; " 3631 "errno = %ld\n", con_driver->desc, 3632 PTR_ERR(con_driver->dev)); 3633 con_driver->dev = NULL; 3634 } else { 3635 vtconsole_init_device(con_driver); 3636 } 3637 3638 err: 3639 module_put(owner); 3640 return retval; 3641 } 3642 3643 3644 /** 3645 * do_unregister_con_driver - unregister console driver from console layer 3646 * @csw: console driver 3647 * 3648 * DESCRIPTION: All drivers that registers to the console layer must 3649 * call this function upon exit, or if the console driver is in a state 3650 * where it won't be able to handle console services, such as the 3651 * framebuffer console without loaded framebuffer drivers. 3652 * 3653 * The driver must unbind first prior to unregistration. 3654 */ 3655 int do_unregister_con_driver(const struct consw *csw) 3656 { 3657 int i; 3658 3659 /* cannot unregister a bound driver */ 3660 if (con_is_bound(csw)) 3661 return -EBUSY; 3662 3663 if (csw == conswitchp) 3664 return -EINVAL; 3665 3666 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3667 struct con_driver *con_driver = ®istered_con_driver[i]; 3668 3669 if (con_driver->con == csw) { 3670 /* 3671 * Defer the removal of the sysfs entries since that 3672 * will acquire the kernfs s_active lock and we can't 3673 * acquire this lock while holding the console lock: 3674 * the unbind sysfs entry imposes already the opposite 3675 * order. Reset con already here to prevent any later 3676 * lookup to succeed and mark this slot as zombie, so 3677 * it won't get reused until we complete the removal 3678 * in the deferred work. 3679 */ 3680 con_driver->con = NULL; 3681 con_driver->flag = CON_DRIVER_FLAG_ZOMBIE; 3682 schedule_work(&con_driver_unregister_work); 3683 3684 return 0; 3685 } 3686 } 3687 3688 return -ENODEV; 3689 } 3690 EXPORT_SYMBOL_GPL(do_unregister_con_driver); 3691 3692 static void con_driver_unregister_callback(struct work_struct *ignored) 3693 { 3694 int i; 3695 3696 console_lock(); 3697 3698 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3699 struct con_driver *con_driver = ®istered_con_driver[i]; 3700 3701 if (!(con_driver->flag & CON_DRIVER_FLAG_ZOMBIE)) 3702 continue; 3703 3704 console_unlock(); 3705 3706 vtconsole_deinit_device(con_driver); 3707 device_destroy(vtconsole_class, MKDEV(0, con_driver->node)); 3708 3709 console_lock(); 3710 3711 if (WARN_ON_ONCE(con_driver->con)) 3712 con_driver->con = NULL; 3713 con_driver->desc = NULL; 3714 con_driver->dev = NULL; 3715 con_driver->node = 0; 3716 WARN_ON_ONCE(con_driver->flag != CON_DRIVER_FLAG_ZOMBIE); 3717 con_driver->flag = 0; 3718 con_driver->first = 0; 3719 con_driver->last = 0; 3720 } 3721 3722 console_unlock(); 3723 } 3724 3725 /* 3726 * If we support more console drivers, this function is used 3727 * when a driver wants to take over some existing consoles 3728 * and become default driver for newly opened ones. 3729 * 3730 * do_take_over_console is basically a register followed by unbind 3731 */ 3732 int do_take_over_console(const struct consw *csw, int first, int last, int deflt) 3733 { 3734 int err; 3735 3736 err = do_register_con_driver(csw, first, last); 3737 /* 3738 * If we get an busy error we still want to bind the console driver 3739 * and return success, as we may have unbound the console driver 3740 * but not unregistered it. 3741 */ 3742 if (err == -EBUSY) 3743 err = 0; 3744 if (!err) 3745 do_bind_con_driver(csw, first, last, deflt); 3746 3747 return err; 3748 } 3749 EXPORT_SYMBOL_GPL(do_take_over_console); 3750 3751 3752 /* 3753 * give_up_console is a wrapper to unregister_con_driver. It will only 3754 * work if driver is fully unbound. 3755 */ 3756 void give_up_console(const struct consw *csw) 3757 { 3758 console_lock(); 3759 do_unregister_con_driver(csw); 3760 console_unlock(); 3761 } 3762 3763 static int __init vtconsole_class_init(void) 3764 { 3765 int i; 3766 3767 vtconsole_class = class_create(THIS_MODULE, "vtconsole"); 3768 if (IS_ERR(vtconsole_class)) { 3769 printk(KERN_WARNING "Unable to create vt console class; " 3770 "errno = %ld\n", PTR_ERR(vtconsole_class)); 3771 vtconsole_class = NULL; 3772 } 3773 3774 /* Add system drivers to sysfs */ 3775 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3776 struct con_driver *con = ®istered_con_driver[i]; 3777 3778 if (con->con && !con->dev) { 3779 con->dev = 3780 device_create_with_groups(vtconsole_class, NULL, 3781 MKDEV(0, con->node), 3782 con, con_dev_groups, 3783 "vtcon%i", con->node); 3784 3785 if (IS_ERR(con->dev)) { 3786 printk(KERN_WARNING "Unable to create " 3787 "device for %s; errno = %ld\n", 3788 con->desc, PTR_ERR(con->dev)); 3789 con->dev = NULL; 3790 } else { 3791 vtconsole_init_device(con); 3792 } 3793 } 3794 } 3795 3796 return 0; 3797 } 3798 postcore_initcall(vtconsole_class_init); 3799 3800 #endif 3801 3802 /* 3803 * Screen blanking 3804 */ 3805 3806 static int set_vesa_blanking(char __user *p) 3807 { 3808 unsigned int mode; 3809 3810 if (get_user(mode, p + 1)) 3811 return -EFAULT; 3812 3813 vesa_blank_mode = (mode < 4) ? mode : 0; 3814 return 0; 3815 } 3816 3817 void do_blank_screen(int entering_gfx) 3818 { 3819 struct vc_data *vc = vc_cons[fg_console].d; 3820 int i; 3821 3822 WARN_CONSOLE_UNLOCKED(); 3823 3824 if (console_blanked) { 3825 if (blank_state == blank_vesa_wait) { 3826 blank_state = blank_off; 3827 vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0); 3828 } 3829 return; 3830 } 3831 3832 /* entering graphics mode? */ 3833 if (entering_gfx) { 3834 hide_cursor(vc); 3835 save_screen(vc); 3836 vc->vc_sw->con_blank(vc, -1, 1); 3837 console_blanked = fg_console + 1; 3838 blank_state = blank_off; 3839 set_origin(vc); 3840 return; 3841 } 3842 3843 if (blank_state != blank_normal_wait) 3844 return; 3845 blank_state = blank_off; 3846 3847 /* don't blank graphics */ 3848 if (vc->vc_mode != KD_TEXT) { 3849 console_blanked = fg_console + 1; 3850 return; 3851 } 3852 3853 hide_cursor(vc); 3854 del_timer_sync(&console_timer); 3855 blank_timer_expired = 0; 3856 3857 save_screen(vc); 3858 /* In case we need to reset origin, blanking hook returns 1 */ 3859 i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0); 3860 console_blanked = fg_console + 1; 3861 if (i) 3862 set_origin(vc); 3863 3864 if (console_blank_hook && console_blank_hook(1)) 3865 return; 3866 3867 if (vesa_off_interval && vesa_blank_mode) { 3868 blank_state = blank_vesa_wait; 3869 mod_timer(&console_timer, jiffies + vesa_off_interval); 3870 } 3871 vt_event_post(VT_EVENT_BLANK, vc->vc_num, vc->vc_num); 3872 } 3873 EXPORT_SYMBOL(do_blank_screen); 3874 3875 /* 3876 * Called by timer as well as from vt_console_driver 3877 */ 3878 void do_unblank_screen(int leaving_gfx) 3879 { 3880 struct vc_data *vc; 3881 3882 /* This should now always be called from a "sane" (read: can schedule) 3883 * context for the sake of the low level drivers, except in the special 3884 * case of oops_in_progress 3885 */ 3886 if (!oops_in_progress) 3887 might_sleep(); 3888 3889 WARN_CONSOLE_UNLOCKED(); 3890 3891 ignore_poke = 0; 3892 if (!console_blanked) 3893 return; 3894 if (!vc_cons_allocated(fg_console)) { 3895 /* impossible */ 3896 pr_warn("unblank_screen: tty %d not allocated ??\n", 3897 fg_console + 1); 3898 return; 3899 } 3900 vc = vc_cons[fg_console].d; 3901 /* Try to unblank in oops case too */ 3902 if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc)) 3903 return; /* but leave console_blanked != 0 */ 3904 3905 if (blankinterval) { 3906 mod_timer(&console_timer, jiffies + (blankinterval * HZ)); 3907 blank_state = blank_normal_wait; 3908 } 3909 3910 console_blanked = 0; 3911 if (vc->vc_sw->con_blank(vc, 0, leaving_gfx) || vt_force_oops_output(vc)) 3912 /* Low-level driver cannot restore -> do it ourselves */ 3913 update_screen(vc); 3914 if (console_blank_hook) 3915 console_blank_hook(0); 3916 set_palette(vc); 3917 set_cursor(vc); 3918 vt_event_post(VT_EVENT_UNBLANK, vc->vc_num, vc->vc_num); 3919 } 3920 EXPORT_SYMBOL(do_unblank_screen); 3921 3922 /* 3923 * This is called by the outside world to cause a forced unblank, mostly for 3924 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually 3925 * call it with 1 as an argument and so force a mode restore... that may kill 3926 * X or at least garbage the screen but would also make the Oops visible... 3927 */ 3928 void unblank_screen(void) 3929 { 3930 do_unblank_screen(0); 3931 } 3932 3933 /* 3934 * We defer the timer blanking to work queue so it can take the console mutex 3935 * (console operations can still happen at irq time, but only from printk which 3936 * has the console mutex. Not perfect yet, but better than no locking 3937 */ 3938 static void blank_screen_t(unsigned long dummy) 3939 { 3940 if (unlikely(!keventd_up())) { 3941 mod_timer(&console_timer, jiffies + (blankinterval * HZ)); 3942 return; 3943 } 3944 blank_timer_expired = 1; 3945 schedule_work(&console_work); 3946 } 3947 3948 void poke_blanked_console(void) 3949 { 3950 WARN_CONSOLE_UNLOCKED(); 3951 3952 /* Add this so we quickly catch whoever might call us in a non 3953 * safe context. Nowadays, unblank_screen() isn't to be called in 3954 * atomic contexts and is allowed to schedule (with the special case 3955 * of oops_in_progress, but that isn't of any concern for this 3956 * function. --BenH. 3957 */ 3958 might_sleep(); 3959 3960 /* This isn't perfectly race free, but a race here would be mostly harmless, 3961 * at worse, we'll do a spurrious blank and it's unlikely 3962 */ 3963 del_timer(&console_timer); 3964 blank_timer_expired = 0; 3965 3966 if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS) 3967 return; 3968 if (console_blanked) 3969 unblank_screen(); 3970 else if (blankinterval) { 3971 mod_timer(&console_timer, jiffies + (blankinterval * HZ)); 3972 blank_state = blank_normal_wait; 3973 } 3974 } 3975 3976 /* 3977 * Palettes 3978 */ 3979 3980 static void set_palette(struct vc_data *vc) 3981 { 3982 WARN_CONSOLE_UNLOCKED(); 3983 3984 if (vc->vc_mode != KD_GRAPHICS) 3985 vc->vc_sw->con_set_palette(vc, color_table); 3986 } 3987 3988 /* 3989 * Load palette into the DAC registers. arg points to a colour 3990 * map, 3 bytes per colour, 16 colours, range from 0 to 255. 3991 */ 3992 3993 int con_set_cmap(unsigned char __user *arg) 3994 { 3995 int i, j, k; 3996 unsigned char colormap[3*16]; 3997 3998 if (copy_from_user(colormap, arg, sizeof(colormap))) 3999 return -EFAULT; 4000 4001 console_lock(); 4002 for (i = k = 0; i < 16; i++) { 4003 default_red[i] = colormap[k++]; 4004 default_grn[i] = colormap[k++]; 4005 default_blu[i] = colormap[k++]; 4006 } 4007 for (i = 0; i < MAX_NR_CONSOLES; i++) { 4008 if (!vc_cons_allocated(i)) 4009 continue; 4010 for (j = k = 0; j < 16; j++) { 4011 vc_cons[i].d->vc_palette[k++] = default_red[j]; 4012 vc_cons[i].d->vc_palette[k++] = default_grn[j]; 4013 vc_cons[i].d->vc_palette[k++] = default_blu[j]; 4014 } 4015 set_palette(vc_cons[i].d); 4016 } 4017 console_unlock(); 4018 4019 return 0; 4020 } 4021 4022 int con_get_cmap(unsigned char __user *arg) 4023 { 4024 int i, k; 4025 unsigned char colormap[3*16]; 4026 4027 console_lock(); 4028 for (i = k = 0; i < 16; i++) { 4029 colormap[k++] = default_red[i]; 4030 colormap[k++] = default_grn[i]; 4031 colormap[k++] = default_blu[i]; 4032 } 4033 console_unlock(); 4034 4035 if (copy_to_user(arg, colormap, sizeof(colormap))) 4036 return -EFAULT; 4037 4038 return 0; 4039 } 4040 4041 void reset_palette(struct vc_data *vc) 4042 { 4043 int j, k; 4044 for (j=k=0; j<16; j++) { 4045 vc->vc_palette[k++] = default_red[j]; 4046 vc->vc_palette[k++] = default_grn[j]; 4047 vc->vc_palette[k++] = default_blu[j]; 4048 } 4049 set_palette(vc); 4050 } 4051 4052 /* 4053 * Font switching 4054 * 4055 * Currently we only support fonts up to 32 pixels wide, at a maximum height 4056 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints, 4057 * depending on width) reserved for each character which is kinda wasty, but 4058 * this is done in order to maintain compatibility with the EGA/VGA fonts. It 4059 * is up to the actual low-level console-driver convert data into its favorite 4060 * format (maybe we should add a `fontoffset' field to the `display' 4061 * structure so we won't have to convert the fontdata all the time. 4062 * /Jes 4063 */ 4064 4065 #define max_font_size 65536 4066 4067 static int con_font_get(struct vc_data *vc, struct console_font_op *op) 4068 { 4069 struct console_font font; 4070 int rc = -EINVAL; 4071 int c; 4072 4073 if (op->data) { 4074 font.data = kmalloc(max_font_size, GFP_KERNEL); 4075 if (!font.data) 4076 return -ENOMEM; 4077 } else 4078 font.data = NULL; 4079 4080 console_lock(); 4081 if (vc->vc_mode != KD_TEXT) 4082 rc = -EINVAL; 4083 else if (vc->vc_sw->con_font_get) 4084 rc = vc->vc_sw->con_font_get(vc, &font); 4085 else 4086 rc = -ENOSYS; 4087 console_unlock(); 4088 4089 if (rc) 4090 goto out; 4091 4092 c = (font.width+7)/8 * 32 * font.charcount; 4093 4094 if (op->data && font.charcount > op->charcount) 4095 rc = -ENOSPC; 4096 if (!(op->flags & KD_FONT_FLAG_OLD)) { 4097 if (font.width > op->width || font.height > op->height) 4098 rc = -ENOSPC; 4099 } else { 4100 if (font.width != 8) 4101 rc = -EIO; 4102 else if ((op->height && font.height > op->height) || 4103 font.height > 32) 4104 rc = -ENOSPC; 4105 } 4106 if (rc) 4107 goto out; 4108 4109 op->height = font.height; 4110 op->width = font.width; 4111 op->charcount = font.charcount; 4112 4113 if (op->data && copy_to_user(op->data, font.data, c)) 4114 rc = -EFAULT; 4115 4116 out: 4117 kfree(font.data); 4118 return rc; 4119 } 4120 4121 static int con_font_set(struct vc_data *vc, struct console_font_op *op) 4122 { 4123 struct console_font font; 4124 int rc = -EINVAL; 4125 int size; 4126 4127 if (vc->vc_mode != KD_TEXT) 4128 return -EINVAL; 4129 if (!op->data) 4130 return -EINVAL; 4131 if (op->charcount > 512) 4132 return -EINVAL; 4133 if (!op->height) { /* Need to guess font height [compat] */ 4134 int h, i; 4135 u8 __user *charmap = op->data; 4136 u8 tmp; 4137 4138 /* If from KDFONTOP ioctl, don't allow things which can be done in userland, 4139 so that we can get rid of this soon */ 4140 if (!(op->flags & KD_FONT_FLAG_OLD)) 4141 return -EINVAL; 4142 for (h = 32; h > 0; h--) 4143 for (i = 0; i < op->charcount; i++) { 4144 if (get_user(tmp, &charmap[32*i+h-1])) 4145 return -EFAULT; 4146 if (tmp) 4147 goto nonzero; 4148 } 4149 return -EINVAL; 4150 nonzero: 4151 op->height = h; 4152 } 4153 if (op->width <= 0 || op->width > 32 || op->height > 32) 4154 return -EINVAL; 4155 size = (op->width+7)/8 * 32 * op->charcount; 4156 if (size > max_font_size) 4157 return -ENOSPC; 4158 font.charcount = op->charcount; 4159 font.height = op->height; 4160 font.width = op->width; 4161 font.data = memdup_user(op->data, size); 4162 if (IS_ERR(font.data)) 4163 return PTR_ERR(font.data); 4164 console_lock(); 4165 if (vc->vc_mode != KD_TEXT) 4166 rc = -EINVAL; 4167 else if (vc->vc_sw->con_font_set) 4168 rc = vc->vc_sw->con_font_set(vc, &font, op->flags); 4169 else 4170 rc = -ENOSYS; 4171 console_unlock(); 4172 kfree(font.data); 4173 return rc; 4174 } 4175 4176 static int con_font_default(struct vc_data *vc, struct console_font_op *op) 4177 { 4178 struct console_font font = {.width = op->width, .height = op->height}; 4179 char name[MAX_FONT_NAME]; 4180 char *s = name; 4181 int rc; 4182 4183 4184 if (!op->data) 4185 s = NULL; 4186 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0) 4187 return -EFAULT; 4188 else 4189 name[MAX_FONT_NAME - 1] = 0; 4190 4191 console_lock(); 4192 if (vc->vc_mode != KD_TEXT) { 4193 console_unlock(); 4194 return -EINVAL; 4195 } 4196 if (vc->vc_sw->con_font_default) 4197 rc = vc->vc_sw->con_font_default(vc, &font, s); 4198 else 4199 rc = -ENOSYS; 4200 console_unlock(); 4201 if (!rc) { 4202 op->width = font.width; 4203 op->height = font.height; 4204 } 4205 return rc; 4206 } 4207 4208 static int con_font_copy(struct vc_data *vc, struct console_font_op *op) 4209 { 4210 int con = op->height; 4211 int rc; 4212 4213 4214 console_lock(); 4215 if (vc->vc_mode != KD_TEXT) 4216 rc = -EINVAL; 4217 else if (!vc->vc_sw->con_font_copy) 4218 rc = -ENOSYS; 4219 else if (con < 0 || !vc_cons_allocated(con)) 4220 rc = -ENOTTY; 4221 else if (con == vc->vc_num) /* nothing to do */ 4222 rc = 0; 4223 else 4224 rc = vc->vc_sw->con_font_copy(vc, con); 4225 console_unlock(); 4226 return rc; 4227 } 4228 4229 int con_font_op(struct vc_data *vc, struct console_font_op *op) 4230 { 4231 switch (op->op) { 4232 case KD_FONT_OP_SET: 4233 return con_font_set(vc, op); 4234 case KD_FONT_OP_GET: 4235 return con_font_get(vc, op); 4236 case KD_FONT_OP_SET_DEFAULT: 4237 return con_font_default(vc, op); 4238 case KD_FONT_OP_COPY: 4239 return con_font_copy(vc, op); 4240 } 4241 return -ENOSYS; 4242 } 4243 4244 /* 4245 * Interface exported to selection and vcs. 4246 */ 4247 4248 /* used by selection */ 4249 u16 screen_glyph(struct vc_data *vc, int offset) 4250 { 4251 u16 w = scr_readw(screenpos(vc, offset, 1)); 4252 u16 c = w & 0xff; 4253 4254 if (w & vc->vc_hi_font_mask) 4255 c |= 0x100; 4256 return c; 4257 } 4258 EXPORT_SYMBOL_GPL(screen_glyph); 4259 4260 /* used by vcs - note the word offset */ 4261 unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed) 4262 { 4263 return screenpos(vc, 2 * w_offset, viewed); 4264 } 4265 EXPORT_SYMBOL_GPL(screen_pos); 4266 4267 void getconsxy(struct vc_data *vc, unsigned char *p) 4268 { 4269 p[0] = vc->vc_x; 4270 p[1] = vc->vc_y; 4271 } 4272 4273 void putconsxy(struct vc_data *vc, unsigned char *p) 4274 { 4275 hide_cursor(vc); 4276 gotoxy(vc, p[0], p[1]); 4277 set_cursor(vc); 4278 } 4279 4280 u16 vcs_scr_readw(struct vc_data *vc, const u16 *org) 4281 { 4282 if ((unsigned long)org == vc->vc_pos && softcursor_original != -1) 4283 return softcursor_original; 4284 return scr_readw(org); 4285 } 4286 4287 void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org) 4288 { 4289 scr_writew(val, org); 4290 if ((unsigned long)org == vc->vc_pos) { 4291 softcursor_original = -1; 4292 add_softcursor(vc); 4293 } 4294 } 4295 4296 void vcs_scr_updated(struct vc_data *vc) 4297 { 4298 notify_update(vc); 4299 } 4300 4301 /* 4302 * Visible symbols for modules 4303 */ 4304 4305 EXPORT_SYMBOL(color_table); 4306 EXPORT_SYMBOL(default_red); 4307 EXPORT_SYMBOL(default_grn); 4308 EXPORT_SYMBOL(default_blu); 4309 EXPORT_SYMBOL(update_region); 4310 EXPORT_SYMBOL(redraw_screen); 4311 EXPORT_SYMBOL(vc_resize); 4312 EXPORT_SYMBOL(fg_console); 4313 EXPORT_SYMBOL(console_blank_hook); 4314 EXPORT_SYMBOL(console_blanked); 4315 EXPORT_SYMBOL(vc_cons); 4316 EXPORT_SYMBOL(global_cursor_default); 4317 #ifndef VT_SINGLE_DRIVER 4318 EXPORT_SYMBOL(give_up_console); 4319 #endif 4320