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