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