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drivers/net/can/mscan/mpc5xxx_can.c: Add of_node_put to avoid memory leak
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / char / vt.c
blobc734f9b1263a7d020550f930e3619fb0f7759d80
1 /*
2 * linux/drivers/char/vt.c
3 *
4 * Copyright (C) 1991, 1992 Linus Torvalds
5 */
6
7 /*
8 * Hopefully this will be a rather complete VT102 implementation.
9 *
10 * Beeping thanks to John T Kohl.
11 *
12 * Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics
13 * Chars, and VT100 enhancements by Peter MacDonald.
14 *
15 * Copy and paste function by Andrew Haylett,
16 * some enhancements by Alessandro Rubini.
17 *
18 * Code to check for different video-cards mostly by Galen Hunt,
19 * <g-hunt@ee.utah.edu>
20 *
21 * Rudimentary ISO 10646/Unicode/UTF-8 character set support by
22 * Markus Kuhn, <mskuhn@immd4.informatik.uni-erlangen.de>.
23 *
24 * Dynamic allocation of consoles, aeb@cwi.nl, May 1994
25 * Resizing of consoles, aeb, 940926
26 *
27 * Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94
28 * <poe@daimi.aau.dk>
29 *
30 * User-defined bell sound, new setterm control sequences and printk
31 * redirection by Martin Mares <mj@k332.feld.cvut.cz> 19-Nov-95
32 *
33 * APM screenblank bug fixed Takashi Manabe <manabe@roy.dsl.tutics.tut.jp>
34 *
35 * Merge with the abstract console driver by Geert Uytterhoeven
36 * <geert@linux-m68k.org>, Jan 1997.
37 *
38 * Original m68k console driver modifications by
39 *
40 * - Arno Griffioen <arno@usn.nl>
41 * - David Carter <carter@cs.bris.ac.uk>
42 *
43 * The abstract console driver provides a generic interface for a text
44 * console. It supports VGA text mode, frame buffer based graphical consoles
45 * and special graphics processors that are only accessible through some
46 * registers (e.g. a TMS340x0 GSP).
47 *
48 * The interface to the hardware is specified using a special structure
49 * (struct consw) which contains function pointers to console operations
50 * (see <linux/console.h> for more information).
51 *
52 * Support for changeable cursor shape
53 * by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997
54 *
55 * Ported to i386 and con_scrolldelta fixed
56 * by Emmanuel Marty <core@ggi-project.org>, April 1998
57 *
58 * Resurrected character buffers in videoram plus lots of other trickery
59 * by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998
60 *
61 * Removed old-style timers, introduced console_timer, made timer
62 * deletion SMP-safe. 17Jun00, Andrew Morton
63 *
64 * Removed console_lock, enabled interrupts across all console operations
65 * 13 March 2001, Andrew Morton
66 *
67 * Fixed UTF-8 mode so alternate charset modes always work according
68 * to control sequences interpreted in do_con_trol function
69 * preserving backward VT100 semigraphics compatibility,
70 * malformed UTF sequences represented as sequences of replacement glyphs,
71 * original codes or '?' as a last resort if replacement glyph is undefined
72 * by Adam Tla/lka <atlka@pg.gda.pl>, Aug 2006
73 */
74
75 #include <linux/module.h>
76 #include <linux/types.h>
77 #include <linux/sched.h>
78 #include <linux/tty.h>
79 #include <linux/tty_flip.h>
80 #include <linux/kernel.h>
81 #include <linux/string.h>
82 #include <linux/errno.h>
83 #include <linux/kd.h>
84 #include <linux/slab.h>
85 #include <linux/major.h>
86 #include <linux/mm.h>
87 #include <linux/console.h>
88 #include <linux/init.h>
89 #include <linux/mutex.h>
90 #include <linux/vt_kern.h>
91 #include <linux/selection.h>
92 #include <linux/smp_lock.h>
93 #include <linux/tiocl.h>
94 #include <linux/kbd_kern.h>
95 #include <linux/consolemap.h>
96 #include <linux/timer.h>
97 #include <linux/interrupt.h>
98 #include <linux/workqueue.h>
99 #include <linux/pm.h>
100 #include <linux/font.h>
101 #include <linux/bitops.h>
102 #include <linux/notifier.h>
103 #include <linux/device.h>
104 #include <linux/io.h>
105 #include <asm/system.h>
106 #include <linux/uaccess.h>
107 #include <linux/kdb.h>
108 #include <linux/ctype.h>
109
110 #define MAX_NR_CON_DRIVER 16
111
112 #define CON_DRIVER_FLAG_MODULE 1
113 #define CON_DRIVER_FLAG_INIT 2
114 #define CON_DRIVER_FLAG_ATTR 4
115
116 struct con_driver {
117 const struct consw *con;
118 const char *desc;
119 struct device *dev;
120 int node;
121 int first;
122 int last;
123 int flag;
124 };
125
126 static struct con_driver registered_con_driver[MAX_NR_CON_DRIVER];
127 const struct consw *conswitchp;
128
129 /* A bitmap for codes <32. A bit of 1 indicates that the code
130 * corresponding to that bit number invokes some special action
131 * (such as cursor movement) and should not be displayed as a
132 * glyph unless the disp_ctrl mode is explicitly enabled.
133 */
134 #define CTRL_ACTION 0x0d00ff81
135 #define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */
136
137 /*
138 * Here is the default bell parameters: 750HZ, 1/8th of a second
139 */
140 #define DEFAULT_BELL_PITCH 750
141 #define DEFAULT_BELL_DURATION (HZ/8)
142
143 struct vc vc_cons [MAX_NR_CONSOLES];
144
145 #ifndef VT_SINGLE_DRIVER
146 static const struct consw *con_driver_map[MAX_NR_CONSOLES];
147 #endif
148
149 static int con_open(struct tty_struct *, struct file *);
150 static void vc_init(struct vc_data *vc, unsigned int rows,
151 unsigned int cols, int do_clear);
152 static void gotoxy(struct vc_data *vc, int new_x, int new_y);
153 static void save_cur(struct vc_data *vc);
154 static void reset_terminal(struct vc_data *vc, int do_clear);
155 static void con_flush_chars(struct tty_struct *tty);
156 static int set_vesa_blanking(char __user *p);
157 static void set_cursor(struct vc_data *vc);
158 static void hide_cursor(struct vc_data *vc);
159 static void console_callback(struct work_struct *ignored);
160 static void blank_screen_t(unsigned long dummy);
161 static void set_palette(struct vc_data *vc);
162
163 static int printable; /* Is console ready for printing? */
164 int default_utf8 = true;
165 module_param(default_utf8, int, S_IRUGO | S_IWUSR);
166 int global_cursor_default = -1;
167 module_param(global_cursor_default, int, S_IRUGO | S_IWUSR);
168
169 static int cur_default = CUR_DEFAULT;
170 module_param(cur_default, int, S_IRUGO | S_IWUSR);
171
172 /*
173 * ignore_poke: don't unblank the screen when things are typed. This is
174 * mainly for the privacy of braille terminal users.
175 */
176 static int ignore_poke;
177
178 int do_poke_blanked_console;
179 int console_blanked;
180
181 static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
182 static int vesa_off_interval;
183 static int blankinterval = 10*60;
184 core_param(consoleblank, blankinterval, int, 0444);
185
186 static DECLARE_WORK(console_work, console_callback);
187
188 /*
189 * fg_console is the current virtual console,
190 * last_console is the last used one,
191 * want_console is the console we want to switch to,
192 * saved_* variants are for save/restore around kernel debugger enter/leave
193 */
194 int fg_console;
195 int last_console;
196 int want_console = -1;
197 int saved_fg_console;
198 int saved_last_console;
199 int saved_want_console;
200 int saved_vc_mode;
201
202 /*
203 * For each existing display, we have a pointer to console currently visible
204 * on that display, allowing consoles other than fg_console to be refreshed
205 * appropriately. Unless the low-level driver supplies its own display_fg
206 * variable, we use this one for the "master display".
207 */
208 static struct vc_data *master_display_fg;
209
210 /*
211 * Unfortunately, we need to delay tty echo when we're currently writing to the
212 * console since the code is (and always was) not re-entrant, so we schedule
213 * all flip requests to process context with schedule-task() and run it from
214 * console_callback().
215 */
216
217 /*
218 * For the same reason, we defer scrollback to the console callback.
219 */
220 static int scrollback_delta;
221
222 /*
223 * Hook so that the power management routines can (un)blank
224 * the console on our behalf.
225 */
226 int (*console_blank_hook)(int);
227
228 static DEFINE_TIMER(console_timer, blank_screen_t, 0, 0);
229 static int blank_state;
230 static int blank_timer_expired;
231 enum {
232 blank_off = 0,
233 blank_normal_wait,
234 blank_vesa_wait,
235 };
236
237 /*
238 * Notifier list for console events.
239 */
240 static ATOMIC_NOTIFIER_HEAD(vt_notifier_list);
241
242 int register_vt_notifier(struct notifier_block *nb)
243 {
244 return atomic_notifier_chain_register(&vt_notifier_list, nb);
245 }
246 EXPORT_SYMBOL_GPL(register_vt_notifier);
247
248 int unregister_vt_notifier(struct notifier_block *nb)
249 {
250 return atomic_notifier_chain_unregister(&vt_notifier_list, nb);
251 }
252 EXPORT_SYMBOL_GPL(unregister_vt_notifier);
253
254 static void notify_write(struct vc_data *vc, unsigned int unicode)
255 {
256 struct vt_notifier_param param = { .vc = vc, unicode = unicode };
257 atomic_notifier_call_chain(&vt_notifier_list, VT_WRITE, &param);
258 }
259
260 static void notify_update(struct vc_data *vc)
261 {
262 struct vt_notifier_param param = { .vc = vc };
263 atomic_notifier_call_chain(&vt_notifier_list, VT_UPDATE, &param);
264 }
265 /*
266 * Low-Level Functions
267 */
268
269 #define IS_FG(vc) ((vc)->vc_num == fg_console)
270
271 #ifdef VT_BUF_VRAM_ONLY
272 #define DO_UPDATE(vc) 0
273 #else
274 #define DO_UPDATE(vc) (CON_IS_VISIBLE(vc) && !console_blanked)
275 #endif
276
277 static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed)
278 {
279 unsigned short *p;
280
281 if (!viewed)
282 p = (unsigned short *)(vc->vc_origin + offset);
283 else if (!vc->vc_sw->con_screen_pos)
284 p = (unsigned short *)(vc->vc_visible_origin + offset);
285 else
286 p = vc->vc_sw->con_screen_pos(vc, offset);
287 return p;
288 }
289
290 /* Called from the keyboard irq path.. */
291 static inline void scrolldelta(int lines)
292 {
293 /* FIXME */
294 /* scrolldelta needs some kind of consistency lock, but the BKL was
295 and still is not protecting versus the scheduled back end */
296 scrollback_delta += lines;
297 schedule_console_callback();
298 }
299
300 void schedule_console_callback(void)
301 {
302 schedule_work(&console_work);
303 }
304
305 static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
306 {
307 unsigned short *d, *s;
308
309 if (t+nr >= b)
310 nr = b - t - 1;
311 if (b > vc->vc_rows || t >= b || nr < 1)
312 return;
313 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr))
314 return;
315 d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
316 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr));
317 scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row);
318 scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_video_erase_char,
319 vc->vc_size_row * nr);
320 }
321
322 static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
323 {
324 unsigned short *s;
325 unsigned int step;
326
327 if (t+nr >= b)
328 nr = b - t - 1;
329 if (b > vc->vc_rows || t >= b || nr < 1)
330 return;
331 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr))
332 return;
333 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
334 step = vc->vc_cols * nr;
335 scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row);
336 scr_memsetw(s, vc->vc_video_erase_char, 2 * step);
337 }
338
339 static void do_update_region(struct vc_data *vc, unsigned long start, int count)
340 {
341 #ifndef VT_BUF_VRAM_ONLY
342 unsigned int xx, yy, offset;
343 u16 *p;
344
345 p = (u16 *) start;
346 if (!vc->vc_sw->con_getxy) {
347 offset = (start - vc->vc_origin) / 2;
348 xx = offset % vc->vc_cols;
349 yy = offset / vc->vc_cols;
350 } else {
351 int nxx, nyy;
352 start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy);
353 xx = nxx; yy = nyy;
354 }
355 for(;;) {
356 u16 attrib = scr_readw(p) & 0xff00;
357 int startx = xx;
358 u16 *q = p;
359 while (xx < vc->vc_cols && count) {
360 if (attrib != (scr_readw(p) & 0xff00)) {
361 if (p > q)
362 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
363 startx = xx;
364 q = p;
365 attrib = scr_readw(p) & 0xff00;
366 }
367 p++;
368 xx++;
369 count--;
370 }
371 if (p > q)
372 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
373 if (!count)
374 break;
375 xx = 0;
376 yy++;
377 if (vc->vc_sw->con_getxy) {
378 p = (u16 *)start;
379 start = vc->vc_sw->con_getxy(vc, start, NULL, NULL);
380 }
381 }
382 #endif
383 }
384
385 void update_region(struct vc_data *vc, unsigned long start, int count)
386 {
387 WARN_CONSOLE_UNLOCKED();
388
389 if (DO_UPDATE(vc)) {
390 hide_cursor(vc);
391 do_update_region(vc, start, count);
392 set_cursor(vc);
393 }
394 }
395
396 /* Structure of attributes is hardware-dependent */
397
398 static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink,
399 u8 _underline, u8 _reverse, u8 _italic)
400 {
401 if (vc->vc_sw->con_build_attr)
402 return vc->vc_sw->con_build_attr(vc, _color, _intensity,
403 _blink, _underline, _reverse, _italic);
404
405 #ifndef VT_BUF_VRAM_ONLY
406 /*
407 * ++roman: I completely changed the attribute format for monochrome
408 * mode (!can_do_color). The formerly used MDA (monochrome display
409 * adapter) format didn't allow the combination of certain effects.
410 * Now the attribute is just a bit vector:
411 * Bit 0..1: intensity (0..2)
412 * Bit 2 : underline
413 * Bit 3 : reverse
414 * Bit 7 : blink
415 */
416 {
417 u8 a = _color;
418 if (!vc->vc_can_do_color)
419 return _intensity |
420 (_italic ? 2 : 0) |
421 (_underline ? 4 : 0) |
422 (_reverse ? 8 : 0) |
423 (_blink ? 0x80 : 0);
424 if (_italic)
425 a = (a & 0xF0) | vc->vc_itcolor;
426 else if (_underline)
427 a = (a & 0xf0) | vc->vc_ulcolor;
428 else if (_intensity == 0)
429 a = (a & 0xf0) | vc->vc_ulcolor;
430 if (_reverse)
431 a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77);
432 if (_blink)
433 a ^= 0x80;
434 if (_intensity == 2)
435 a ^= 0x08;
436 if (vc->vc_hi_font_mask == 0x100)
437 a <<= 1;
438 return a;
439 }
440 #else
441 return 0;
442 #endif
443 }
444
445 static void update_attr(struct vc_data *vc)
446 {
447 vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity,
448 vc->vc_blink, vc->vc_underline,
449 vc->vc_reverse ^ vc->vc_decscnm, vc->vc_italic);
450 vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm, 0) << 8) | ' ';
451 }
452
453 /* Note: inverting the screen twice should revert to the original state */
454 void invert_screen(struct vc_data *vc, int offset, int count, int viewed)
455 {
456 unsigned short *p;
457
458 WARN_CONSOLE_UNLOCKED();
459
460 count /= 2;
461 p = screenpos(vc, offset, viewed);
462 if (vc->vc_sw->con_invert_region)
463 vc->vc_sw->con_invert_region(vc, p, count);
464 #ifndef VT_BUF_VRAM_ONLY
465 else {
466 u16 *q = p;
467 int cnt = count;
468 u16 a;
469
470 if (!vc->vc_can_do_color) {
471 while (cnt--) {
472 a = scr_readw(q);
473 a ^= 0x0800;
474 scr_writew(a, q);
475 q++;
476 }
477 } else if (vc->vc_hi_font_mask == 0x100) {
478 while (cnt--) {
479 a = scr_readw(q);
480 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4);
481 scr_writew(a, q);
482 q++;
483 }
484 } else {
485 while (cnt--) {
486 a = scr_readw(q);
487 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4);
488 scr_writew(a, q);
489 q++;
490 }
491 }
492 }
493 #endif
494 if (DO_UPDATE(vc))
495 do_update_region(vc, (unsigned long) p, count);
496 }
497
498 /* used by selection: complement pointer position */
499 void complement_pos(struct vc_data *vc, int offset)
500 {
501 static int old_offset = -1;
502 static unsigned short old;
503 static unsigned short oldx, oldy;
504
505 WARN_CONSOLE_UNLOCKED();
506
507 if (old_offset != -1 && old_offset >= 0 &&
508 old_offset < vc->vc_screenbuf_size) {
509 scr_writew(old, screenpos(vc, old_offset, 1));
510 if (DO_UPDATE(vc))
511 vc->vc_sw->con_putc(vc, old, oldy, oldx);
512 }
513
514 old_offset = offset;
515
516 if (offset != -1 && offset >= 0 &&
517 offset < vc->vc_screenbuf_size) {
518 unsigned short new;
519 unsigned short *p;
520 p = screenpos(vc, offset, 1);
521 old = scr_readw(p);
522 new = old ^ vc->vc_complement_mask;
523 scr_writew(new, p);
524 if (DO_UPDATE(vc)) {
525 oldx = (offset >> 1) % vc->vc_cols;
526 oldy = (offset >> 1) / vc->vc_cols;
527 vc->vc_sw->con_putc(vc, new, oldy, oldx);
528 }
529 }
530
531 }
532
533 static void insert_char(struct vc_data *vc, unsigned int nr)
534 {
535 unsigned short *p, *q = (unsigned short *)vc->vc_pos;
536
537 p = q + vc->vc_cols - nr - vc->vc_x;
538 while (--p >= q)
539 scr_writew(scr_readw(p), p + nr);
540 scr_memsetw(q, vc->vc_video_erase_char, nr * 2);
541 vc->vc_need_wrap = 0;
542 if (DO_UPDATE(vc)) {
543 unsigned short oldattr = vc->vc_attr;
544 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x, vc->vc_y, vc->vc_x + nr, 1,
545 vc->vc_cols - vc->vc_x - nr);
546 vc->vc_attr = vc->vc_video_erase_char >> 8;
547 while (nr--)
548 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y, vc->vc_x + nr);
549 vc->vc_attr = oldattr;
550 }
551 }
552
553 static void delete_char(struct vc_data *vc, unsigned int nr)
554 {
555 unsigned int i = vc->vc_x;
556 unsigned short *p = (unsigned short *)vc->vc_pos;
557
558 while (++i <= vc->vc_cols - nr) {
559 scr_writew(scr_readw(p+nr), p);
560 p++;
561 }
562 scr_memsetw(p, vc->vc_video_erase_char, nr * 2);
563 vc->vc_need_wrap = 0;
564 if (DO_UPDATE(vc)) {
565 unsigned short oldattr = vc->vc_attr;
566 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x + nr, vc->vc_y, vc->vc_x, 1,
567 vc->vc_cols - vc->vc_x - nr);
568 vc->vc_attr = vc->vc_video_erase_char >> 8;
569 while (nr--)
570 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y,
571 vc->vc_cols - 1 - nr);
572 vc->vc_attr = oldattr;
573 }
574 }
575
576 static int softcursor_original;
577
578 static void add_softcursor(struct vc_data *vc)
579 {
580 int i = scr_readw((u16 *) vc->vc_pos);
581 u32 type = vc->vc_cursor_type;
582
583 if (! (type & 0x10)) return;
584 if (softcursor_original != -1) return;
585 softcursor_original = i;
586 i |= ((type >> 8) & 0xff00 );
587 i ^= ((type) & 0xff00 );
588 if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000;
589 if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700;
590 scr_writew(i, (u16 *) vc->vc_pos);
591 if (DO_UPDATE(vc))
592 vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x);
593 }
594
595 static void hide_softcursor(struct vc_data *vc)
596 {
597 if (softcursor_original != -1) {
598 scr_writew(softcursor_original, (u16 *)vc->vc_pos);
599 if (DO_UPDATE(vc))
600 vc->vc_sw->con_putc(vc, softcursor_original,
601 vc->vc_y, vc->vc_x);
602 softcursor_original = -1;
603 }
604 }
605
606 static void hide_cursor(struct vc_data *vc)
607 {
608 if (vc == sel_cons)
609 clear_selection();
610 vc->vc_sw->con_cursor(vc, CM_ERASE);
611 hide_softcursor(vc);
612 }
613
614 static void set_cursor(struct vc_data *vc)
615 {
616 if (!IS_FG(vc) || console_blanked ||
617 vc->vc_mode == KD_GRAPHICS)
618 return;
619 if (vc->vc_deccm) {
620 if (vc == sel_cons)
621 clear_selection();
622 add_softcursor(vc);
623 if ((vc->vc_cursor_type & 0x0f) != 1)
624 vc->vc_sw->con_cursor(vc, CM_DRAW);
625 } else
626 hide_cursor(vc);
627 }
628
629 static void set_origin(struct vc_data *vc)
630 {
631 WARN_CONSOLE_UNLOCKED();
632
633 if (!CON_IS_VISIBLE(vc) ||
634 !vc->vc_sw->con_set_origin ||
635 !vc->vc_sw->con_set_origin(vc))
636 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
637 vc->vc_visible_origin = vc->vc_origin;
638 vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size;
639 vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x;
640 }
641
642 static inline void save_screen(struct vc_data *vc)
643 {
644 WARN_CONSOLE_UNLOCKED();
645
646 if (vc->vc_sw->con_save_screen)
647 vc->vc_sw->con_save_screen(vc);
648 }
649
650 /*
651 * Redrawing of screen
652 */
653
654 static void clear_buffer_attributes(struct vc_data *vc)
655 {
656 unsigned short *p = (unsigned short *)vc->vc_origin;
657 int count = vc->vc_screenbuf_size / 2;
658 int mask = vc->vc_hi_font_mask | 0xff;
659
660 for (; count > 0; count--, p++) {
661 scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p);
662 }
663 }
664
665 void redraw_screen(struct vc_data *vc, int is_switch)
666 {
667 int redraw = 0;
668
669 WARN_CONSOLE_UNLOCKED();
670
671 if (!vc) {
672 /* strange ... */
673 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
674 return;
675 }
676
677 if (is_switch) {
678 struct vc_data *old_vc = vc_cons[fg_console].d;
679 if (old_vc == vc)
680 return;
681 if (!CON_IS_VISIBLE(vc))
682 redraw = 1;
683 *vc->vc_display_fg = vc;
684 fg_console = vc->vc_num;
685 hide_cursor(old_vc);
686 if (!CON_IS_VISIBLE(old_vc)) {
687 save_screen(old_vc);
688 set_origin(old_vc);
689 }
690 } else {
691 hide_cursor(vc);
692 redraw = 1;
693 }
694
695 if (redraw) {
696 int update;
697 int old_was_color = vc->vc_can_do_color;
698
699 set_origin(vc);
700 update = vc->vc_sw->con_switch(vc);
701 set_palette(vc);
702 /*
703 * If console changed from mono<->color, the best we can do
704 * is to clear the buffer attributes. As it currently stands,
705 * rebuilding new attributes from the old buffer is not doable
706 * without overly complex code.
707 */
708 if (old_was_color != vc->vc_can_do_color) {
709 update_attr(vc);
710 clear_buffer_attributes(vc);
711 }
712
713 /* Forcibly update if we're panicing */
714 if ((update && vc->vc_mode != KD_GRAPHICS) ||
715 vt_force_oops_output(vc))
716 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
717 }
718 set_cursor(vc);
719 if (is_switch) {
720 set_leds();
721 compute_shiftstate();
722 notify_update(vc);
723 }
724 }
725
726 /*
727 * Allocation, freeing and resizing of VTs.
728 */
729
730 int vc_cons_allocated(unsigned int i)
731 {
732 return (i < MAX_NR_CONSOLES && vc_cons[i].d);
733 }
734
735 static void visual_init(struct vc_data *vc, int num, int init)
736 {
737 /* ++Geert: vc->vc_sw->con_init determines console size */
738 if (vc->vc_sw)
739 module_put(vc->vc_sw->owner);
740 vc->vc_sw = conswitchp;
741 #ifndef VT_SINGLE_DRIVER
742 if (con_driver_map[num])
743 vc->vc_sw = con_driver_map[num];
744 #endif
745 __module_get(vc->vc_sw->owner);
746 vc->vc_num = num;
747 vc->vc_display_fg = &master_display_fg;
748 vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir;
749 vc->vc_uni_pagedir = 0;
750 vc->vc_hi_font_mask = 0;
751 vc->vc_complement_mask = 0;
752 vc->vc_can_do_color = 0;
753 vc->vc_panic_force_write = false;
754 vc->vc_sw->con_init(vc, init);
755 if (!vc->vc_complement_mask)
756 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
757 vc->vc_s_complement_mask = vc->vc_complement_mask;
758 vc->vc_size_row = vc->vc_cols << 1;
759 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
760 }
761
762 int vc_allocate(unsigned int currcons) /* return 0 on success */
763 {
764 WARN_CONSOLE_UNLOCKED();
765
766 if (currcons >= MAX_NR_CONSOLES)
767 return -ENXIO;
768 if (!vc_cons[currcons].d) {
769 struct vc_data *vc;
770 struct vt_notifier_param param;
771
772 /* prevent users from taking too much memory */
773 if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE))
774 return -EPERM;
775
776 /* due to the granularity of kmalloc, we waste some memory here */
777 /* the alloc is done in two steps, to optimize the common situation
778 of a 25x80 console (structsize=216, screenbuf_size=4000) */
779 /* although the numbers above are not valid since long ago, the
780 point is still up-to-date and the comment still has its value
781 even if only as a historical artifact. --mj, July 1998 */
782 param.vc = vc = kzalloc(sizeof(struct vc_data), GFP_KERNEL);
783 if (!vc)
784 return -ENOMEM;
785 vc_cons[currcons].d = vc;
786 tty_port_init(&vc->port);
787 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
788 visual_init(vc, currcons, 1);
789 if (!*vc->vc_uni_pagedir_loc)
790 con_set_default_unimap(vc);
791 vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL);
792 if (!vc->vc_screenbuf) {
793 kfree(vc);
794 vc_cons[currcons].d = NULL;
795 return -ENOMEM;
796 }
797
798 /* If no drivers have overridden us and the user didn't pass a
799 boot option, default to displaying the cursor */
800 if (global_cursor_default == -1)
801 global_cursor_default = 1;
802
803 vc_init(vc, vc->vc_rows, vc->vc_cols, 1);
804 vcs_make_sysfs(currcons);
805 atomic_notifier_call_chain(&vt_notifier_list, VT_ALLOCATE, &param);
806 }
807 return 0;
808 }
809
810 static inline int resize_screen(struct vc_data *vc, int width, int height,
811 int user)
812 {
813 /* Resizes the resolution of the display adapater */
814 int err = 0;
815
816 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize)
817 err = vc->vc_sw->con_resize(vc, width, height, user);
818
819 return err;
820 }
821
822 /*
823 * Change # of rows and columns (0 means unchanged/the size of fg_console)
824 * [this is to be used together with some user program
825 * like resize that changes the hardware videomode]
826 */
827 #define VC_RESIZE_MAXCOL (32767)
828 #define VC_RESIZE_MAXROW (32767)
829
830 /**
831 * vc_do_resize - resizing method for the tty
832 * @tty: tty being resized
833 * @real_tty: real tty (different to tty if a pty/tty pair)
834 * @vc: virtual console private data
835 * @cols: columns
836 * @lines: lines
837 *
838 * Resize a virtual console, clipping according to the actual constraints.
839 * If the caller passes a tty structure then update the termios winsize
840 * information and perform any necessary signal handling.
841 *
842 * Caller must hold the console semaphore. Takes the termios mutex and
843 * ctrl_lock of the tty IFF a tty is passed.
844 */
845
846 static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc,
847 unsigned int cols, unsigned int lines)
848 {
849 unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0;
850 unsigned long end;
851 unsigned int old_cols, old_rows, old_row_size, old_screen_size;
852 unsigned int new_cols, new_rows, new_row_size, new_screen_size;
853 unsigned int user;
854 unsigned short *newscreen;
855
856 WARN_CONSOLE_UNLOCKED();
857
858 if (!vc)
859 return -ENXIO;
860
861 user = vc->vc_resize_user;
862 vc->vc_resize_user = 0;
863
864 if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW)
865 return -EINVAL;
866
867 new_cols = (cols ? cols : vc->vc_cols);
868 new_rows = (lines ? lines : vc->vc_rows);
869 new_row_size = new_cols << 1;
870 new_screen_size = new_row_size * new_rows;
871
872 if (new_cols == vc->vc_cols && new_rows == vc->vc_rows)
873 return 0;
874
875 newscreen = kmalloc(new_screen_size, GFP_USER);
876 if (!newscreen)
877 return -ENOMEM;
878
879 old_rows = vc->vc_rows;
880 old_cols = vc->vc_cols;
881 old_row_size = vc->vc_size_row;
882 old_screen_size = vc->vc_screenbuf_size;
883
884 err = resize_screen(vc, new_cols, new_rows, user);
885 if (err) {
886 kfree(newscreen);
887 return err;
888 }
889
890 vc->vc_rows = new_rows;
891 vc->vc_cols = new_cols;
892 vc->vc_size_row = new_row_size;
893 vc->vc_screenbuf_size = new_screen_size;
894
895 rlth = min(old_row_size, new_row_size);
896 rrem = new_row_size - rlth;
897 old_origin = vc->vc_origin;
898 new_origin = (long) newscreen;
899 new_scr_end = new_origin + new_screen_size;
900
901 if (vc->vc_y > new_rows) {
902 if (old_rows - vc->vc_y < new_rows) {
903 /*
904 * Cursor near the bottom, copy contents from the
905 * bottom of buffer
906 */
907 old_origin += (old_rows - new_rows) * old_row_size;
908 end = vc->vc_scr_end;
909 } else {
910 /*
911 * Cursor is in no man's land, copy 1/2 screenful
912 * from the top and bottom of cursor position
913 */
914 old_origin += (vc->vc_y - new_rows/2) * old_row_size;
915 end = old_origin + (old_row_size * new_rows);
916 }
917 } else
918 /*
919 * Cursor near the top, copy contents from the top of buffer
920 */
921 end = (old_rows > new_rows) ? old_origin +
922 (old_row_size * new_rows) :
923 vc->vc_scr_end;
924
925 update_attr(vc);
926
927 while (old_origin < end) {
928 scr_memcpyw((unsigned short *) new_origin,
929 (unsigned short *) old_origin, rlth);
930 if (rrem)
931 scr_memsetw((void *)(new_origin + rlth),
932 vc->vc_video_erase_char, rrem);
933 old_origin += old_row_size;
934 new_origin += new_row_size;
935 }
936 if (new_scr_end > new_origin)
937 scr_memsetw((void *)new_origin, vc->vc_video_erase_char,
938 new_scr_end - new_origin);
939 kfree(vc->vc_screenbuf);
940 vc->vc_screenbuf = newscreen;
941 vc->vc_screenbuf_size = new_screen_size;
942 set_origin(vc);
943
944 /* do part of a reset_terminal() */
945 vc->vc_top = 0;
946 vc->vc_bottom = vc->vc_rows;
947 gotoxy(vc, vc->vc_x, vc->vc_y);
948 save_cur(vc);
949
950 if (tty) {
951 /* Rewrite the requested winsize data with the actual
952 resulting sizes */
953 struct winsize ws;
954 memset(&ws, 0, sizeof(ws));
955 ws.ws_row = vc->vc_rows;
956 ws.ws_col = vc->vc_cols;
957 ws.ws_ypixel = vc->vc_scan_lines;
958 tty_do_resize(tty, &ws);
959 }
960
961 if (CON_IS_VISIBLE(vc))
962 update_screen(vc);
963 vt_event_post(VT_EVENT_RESIZE, vc->vc_num, vc->vc_num);
964 return err;
965 }
966
967 /**
968 * vc_resize - resize a VT
969 * @vc: virtual console
970 * @cols: columns
971 * @rows: rows
972 *
973 * Resize a virtual console as seen from the console end of things. We
974 * use the common vc_do_resize methods to update the structures. The
975 * caller must hold the console sem to protect console internals and
976 * vc->port.tty
977 */
978
979 int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int rows)
980 {
981 return vc_do_resize(vc->port.tty, vc, cols, rows);
982 }
983
984 /**
985 * vt_resize - resize a VT
986 * @tty: tty to resize
987 * @ws: winsize attributes
988 *
989 * Resize a virtual terminal. This is called by the tty layer as we
990 * register our own handler for resizing. The mutual helper does all
991 * the actual work.
992 *
993 * Takes the console sem and the called methods then take the tty
994 * termios_mutex and the tty ctrl_lock in that order.
995 */
996 static int vt_resize(struct tty_struct *tty, struct winsize *ws)
997 {
998 struct vc_data *vc = tty->driver_data;
999 int ret;
1000
1001 acquire_console_sem();
1002 ret = vc_do_resize(tty, vc, ws->ws_col, ws->ws_row);
1003 release_console_sem();
1004 return ret;
1005 }
1006
1007 void vc_deallocate(unsigned int currcons)
1008 {
1009 WARN_CONSOLE_UNLOCKED();
1010
1011 if (vc_cons_allocated(currcons)) {
1012 struct vc_data *vc = vc_cons[currcons].d;
1013 struct vt_notifier_param param = { .vc = vc };
1014
1015 atomic_notifier_call_chain(&vt_notifier_list, VT_DEALLOCATE, &param);
1016 vcs_remove_sysfs(currcons);
1017 vc->vc_sw->con_deinit(vc);
1018 put_pid(vc->vt_pid);
1019 module_put(vc->vc_sw->owner);
1020 kfree(vc->vc_screenbuf);
1021 if (currcons >= MIN_NR_CONSOLES)
1022 kfree(vc);
1023 vc_cons[currcons].d = NULL;
1024 }
1025 }
1026
1027 /*
1028 * VT102 emulator
1029 */
1030
1031 #define set_kbd(vc, x) set_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1032 #define clr_kbd(vc, x) clr_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1033 #define is_kbd(vc, x) vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1034
1035 #define decarm VC_REPEAT
1036 #define decckm VC_CKMODE
1037 #define kbdapplic VC_APPLIC
1038 #define lnm VC_CRLF
1039
1040 /*
1041 * this is what the terminal answers to a ESC-Z or csi0c query.
1042 */
1043 #define VT100ID "\033[?1;2c"
1044 #define VT102ID "\033[?6c"
1045
1046 unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7,
1047 8,12,10,14, 9,13,11,15 };
1048
1049 /* the default colour table, for VGA+ colour systems */
1050 int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
1051 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
1052 int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
1053 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
1054 int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
1055 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
1056
1057 module_param_array(default_red, int, NULL, S_IRUGO | S_IWUSR);
1058 module_param_array(default_grn, int, NULL, S_IRUGO | S_IWUSR);
1059 module_param_array(default_blu, int, NULL, S_IRUGO | S_IWUSR);
1060
1061 /*
1062 * gotoxy() must verify all boundaries, because the arguments
1063 * might also be negative. If the given position is out of
1064 * bounds, the cursor is placed at the nearest margin.
1065 */
1066 static void gotoxy(struct vc_data *vc, int new_x, int new_y)
1067 {
1068 int min_y, max_y;
1069
1070 if (new_x < 0)
1071 vc->vc_x = 0;
1072 else {
1073 if (new_x >= vc->vc_cols)
1074 vc->vc_x = vc->vc_cols - 1;
1075 else
1076 vc->vc_x = new_x;
1077 }
1078
1079 if (vc->vc_decom) {
1080 min_y = vc->vc_top;
1081 max_y = vc->vc_bottom;
1082 } else {
1083 min_y = 0;
1084 max_y = vc->vc_rows;
1085 }
1086 if (new_y < min_y)
1087 vc->vc_y = min_y;
1088 else if (new_y >= max_y)
1089 vc->vc_y = max_y - 1;
1090 else
1091 vc->vc_y = new_y;
1092 vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1);
1093 vc->vc_need_wrap = 0;
1094 }
1095
1096 /* for absolute user moves, when decom is set */
1097 static void gotoxay(struct vc_data *vc, int new_x, int new_y)
1098 {
1099 gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y);
1100 }
1101
1102 void scrollback(struct vc_data *vc, int lines)
1103 {
1104 if (!lines)
1105 lines = vc->vc_rows / 2;
1106 scrolldelta(-lines);
1107 }
1108
1109 void scrollfront(struct vc_data *vc, int lines)
1110 {
1111 if (!lines)
1112 lines = vc->vc_rows / 2;
1113 scrolldelta(lines);
1114 }
1115
1116 static void lf(struct vc_data *vc)
1117 {
1118 /* don't scroll if above bottom of scrolling region, or
1119 * if below scrolling region
1120 */
1121 if (vc->vc_y + 1 == vc->vc_bottom)
1122 scrup(vc, vc->vc_top, vc->vc_bottom, 1);
1123 else if (vc->vc_y < vc->vc_rows - 1) {
1124 vc->vc_y++;
1125 vc->vc_pos += vc->vc_size_row;
1126 }
1127 vc->vc_need_wrap = 0;
1128 notify_write(vc, '\n');
1129 }
1130
1131 static void ri(struct vc_data *vc)
1132 {
1133 /* don't scroll if below top of scrolling region, or
1134 * if above scrolling region
1135 */
1136 if (vc->vc_y == vc->vc_top)
1137 scrdown(vc, vc->vc_top, vc->vc_bottom, 1);
1138 else if (vc->vc_y > 0) {
1139 vc->vc_y--;
1140 vc->vc_pos -= vc->vc_size_row;
1141 }
1142 vc->vc_need_wrap = 0;
1143 }
1144
1145 static inline void cr(struct vc_data *vc)
1146 {
1147 vc->vc_pos -= vc->vc_x << 1;
1148 vc->vc_need_wrap = vc->vc_x = 0;
1149 notify_write(vc, '\r');
1150 }
1151
1152 static inline void bs(struct vc_data *vc)
1153 {
1154 if (vc->vc_x) {
1155 vc->vc_pos -= 2;
1156 vc->vc_x--;
1157 vc->vc_need_wrap = 0;
1158 notify_write(vc, '\b');
1159 }
1160 }
1161
1162 static inline void del(struct vc_data *vc)
1163 {
1164 /* ignored */
1165 }
1166
1167 static void csi_J(struct vc_data *vc, int vpar)
1168 {
1169 unsigned int count;
1170 unsigned short * start;
1171
1172 switch (vpar) {
1173 case 0: /* erase from cursor to end of display */
1174 count = (vc->vc_scr_end - vc->vc_pos) >> 1;
1175 start = (unsigned short *)vc->vc_pos;
1176 if (DO_UPDATE(vc)) {
1177 /* do in two stages */
1178 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1179 vc->vc_cols - vc->vc_x);
1180 vc->vc_sw->con_clear(vc, vc->vc_y + 1, 0,
1181 vc->vc_rows - vc->vc_y - 1,
1182 vc->vc_cols);
1183 }
1184 break;
1185 case 1: /* erase from start to cursor */
1186 count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1;
1187 start = (unsigned short *)vc->vc_origin;
1188 if (DO_UPDATE(vc)) {
1189 /* do in two stages */
1190 vc->vc_sw->con_clear(vc, 0, 0, vc->vc_y,
1191 vc->vc_cols);
1192 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1193 vc->vc_x + 1);
1194 }
1195 break;
1196 case 2: /* erase whole display */
1197 count = vc->vc_cols * vc->vc_rows;
1198 start = (unsigned short *)vc->vc_origin;
1199 if (DO_UPDATE(vc))
1200 vc->vc_sw->con_clear(vc, 0, 0,
1201 vc->vc_rows,
1202 vc->vc_cols);
1203 break;
1204 default:
1205 return;
1206 }
1207 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1208 vc->vc_need_wrap = 0;
1209 }
1210
1211 static void csi_K(struct vc_data *vc, int vpar)
1212 {
1213 unsigned int count;
1214 unsigned short * start;
1215
1216 switch (vpar) {
1217 case 0: /* erase from cursor to end of line */
1218 count = vc->vc_cols - vc->vc_x;
1219 start = (unsigned short *)vc->vc_pos;
1220 if (DO_UPDATE(vc))
1221 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1222 vc->vc_cols - vc->vc_x);
1223 break;
1224 case 1: /* erase from start of line to cursor */
1225 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1226 count = vc->vc_x + 1;
1227 if (DO_UPDATE(vc))
1228 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1229 vc->vc_x + 1);
1230 break;
1231 case 2: /* erase whole line */
1232 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1233 count = vc->vc_cols;
1234 if (DO_UPDATE(vc))
1235 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1236 vc->vc_cols);
1237 break;
1238 default:
1239 return;
1240 }
1241 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1242 vc->vc_need_wrap = 0;
1243 }
1244
1245 static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */
1246 { /* not vt100? */
1247 int count;
1248
1249 if (!vpar)
1250 vpar++;
1251 count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar;
1252
1253 scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count);
1254 if (DO_UPDATE(vc))
1255 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count);
1256 vc->vc_need_wrap = 0;
1257 }
1258
1259 static void default_attr(struct vc_data *vc)
1260 {
1261 vc->vc_intensity = 1;
1262 vc->vc_italic = 0;
1263 vc->vc_underline = 0;
1264 vc->vc_reverse = 0;
1265 vc->vc_blink = 0;
1266 vc->vc_color = vc->vc_def_color;
1267 }
1268
1269 /* console_sem is held */
1270 static void csi_m(struct vc_data *vc)
1271 {
1272 int i;
1273
1274 for (i = 0; i <= vc->vc_npar; i++)
1275 switch (vc->vc_par[i]) {
1276 case 0: /* all attributes off */
1277 default_attr(vc);
1278 break;
1279 case 1:
1280 vc->vc_intensity = 2;
1281 break;
1282 case 2:
1283 vc->vc_intensity = 0;
1284 break;
1285 case 3:
1286 vc->vc_italic = 1;
1287 break;
1288 case 4:
1289 vc->vc_underline = 1;
1290 break;
1291 case 5:
1292 vc->vc_blink = 1;
1293 break;
1294 case 7:
1295 vc->vc_reverse = 1;
1296 break;
1297 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1298 * Select primary font, don't display
1299 * control chars if defined, don't set
1300 * bit 8 on output.
1301 */
1302 vc->vc_translate = set_translate(vc->vc_charset == 0
1303 ? vc->vc_G0_charset
1304 : vc->vc_G1_charset, vc);
1305 vc->vc_disp_ctrl = 0;
1306 vc->vc_toggle_meta = 0;
1307 break;
1308 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1309 * Select first alternate font, lets
1310 * chars < 32 be displayed as ROM chars.
1311 */
1312 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1313 vc->vc_disp_ctrl = 1;
1314 vc->vc_toggle_meta = 0;
1315 break;
1316 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1317 * Select second alternate font, toggle
1318 * high bit before displaying as ROM char.
1319 */
1320 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1321 vc->vc_disp_ctrl = 1;
1322 vc->vc_toggle_meta = 1;
1323 break;
1324 case 21:
1325 case 22:
1326 vc->vc_intensity = 1;
1327 break;
1328 case 23:
1329 vc->vc_italic = 0;
1330 break;
1331 case 24:
1332 vc->vc_underline = 0;
1333 break;
1334 case 25:
1335 vc->vc_blink = 0;
1336 break;
1337 case 27:
1338 vc->vc_reverse = 0;
1339 break;
1340 case 38: /* ANSI X3.64-1979 (SCO-ish?)
1341 * Enables underscore, white foreground
1342 * with white underscore (Linux - use
1343 * default foreground).
1344 */
1345 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1346 vc->vc_underline = 1;
1347 break;
1348 case 39: /* ANSI X3.64-1979 (SCO-ish?)
1349 * Disable underline option.
1350 * Reset colour to default? It did this
1351 * before...
1352 */
1353 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1354 vc->vc_underline = 0;
1355 break;
1356 case 49:
1357 vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f);
1358 break;
1359 default:
1360 if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37)
1361 vc->vc_color = color_table[vc->vc_par[i] - 30]
1362 | (vc->vc_color & 0xf0);
1363 else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47)
1364 vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4)
1365 | (vc->vc_color & 0x0f);
1366 break;
1367 }
1368 update_attr(vc);
1369 }
1370
1371 static void respond_string(const char *p, struct tty_struct *tty)
1372 {
1373 while (*p) {
1374 tty_insert_flip_char(tty, *p, 0);
1375 p++;
1376 }
1377 con_schedule_flip(tty);
1378 }
1379
1380 static void cursor_report(struct vc_data *vc, struct tty_struct *tty)
1381 {
1382 char buf[40];
1383
1384 sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1);
1385 respond_string(buf, tty);
1386 }
1387
1388 static inline void status_report(struct tty_struct *tty)
1389 {
1390 respond_string("\033[0n", tty); /* Terminal ok */
1391 }
1392
1393 static inline void respond_ID(struct tty_struct * tty)
1394 {
1395 respond_string(VT102ID, tty);
1396 }
1397
1398 void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry)
1399 {
1400 char buf[8];
1401
1402 sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx),
1403 (char)('!' + mry));
1404 respond_string(buf, tty);
1405 }
1406
1407 /* invoked via ioctl(TIOCLINUX) and through set_selection */
1408 int mouse_reporting(void)
1409 {
1410 return vc_cons[fg_console].d->vc_report_mouse;
1411 }
1412
1413 /* console_sem is held */
1414 static void set_mode(struct vc_data *vc, int on_off)
1415 {
1416 int i;
1417
1418 for (i = 0; i <= vc->vc_npar; i++)
1419 if (vc->vc_ques) {
1420 switch(vc->vc_par[i]) { /* DEC private modes set/reset */
1421 case 1: /* Cursor keys send ^[Ox/^[[x */
1422 if (on_off)
1423 set_kbd(vc, decckm);
1424 else
1425 clr_kbd(vc, decckm);
1426 break;
1427 case 3: /* 80/132 mode switch unimplemented */
1428 vc->vc_deccolm = on_off;
1429 #if 0
1430 vc_resize(deccolm ? 132 : 80, vc->vc_rows);
1431 /* this alone does not suffice; some user mode
1432 utility has to change the hardware regs */
1433 #endif
1434 break;
1435 case 5: /* Inverted screen on/off */
1436 if (vc->vc_decscnm != on_off) {
1437 vc->vc_decscnm = on_off;
1438 invert_screen(vc, 0, vc->vc_screenbuf_size, 0);
1439 update_attr(vc);
1440 }
1441 break;
1442 case 6: /* Origin relative/absolute */
1443 vc->vc_decom = on_off;
1444 gotoxay(vc, 0, 0);
1445 break;
1446 case 7: /* Autowrap on/off */
1447 vc->vc_decawm = on_off;
1448 break;
1449 case 8: /* Autorepeat on/off */
1450 if (on_off)
1451 set_kbd(vc, decarm);
1452 else
1453 clr_kbd(vc, decarm);
1454 break;
1455 case 9:
1456 vc->vc_report_mouse = on_off ? 1 : 0;
1457 break;
1458 case 25: /* Cursor on/off */
1459 vc->vc_deccm = on_off;
1460 break;
1461 case 1000:
1462 vc->vc_report_mouse = on_off ? 2 : 0;
1463 break;
1464 }
1465 } else {
1466 switch(vc->vc_par[i]) { /* ANSI modes set/reset */
1467 case 3: /* Monitor (display ctrls) */
1468 vc->vc_disp_ctrl = on_off;
1469 break;
1470 case 4: /* Insert Mode on/off */
1471 vc->vc_decim = on_off;
1472 break;
1473 case 20: /* Lf, Enter == CrLf/Lf */
1474 if (on_off)
1475 set_kbd(vc, lnm);
1476 else
1477 clr_kbd(vc, lnm);
1478 break;
1479 }
1480 }
1481 }
1482
1483 /* console_sem is held */
1484 static void setterm_command(struct vc_data *vc)
1485 {
1486 switch(vc->vc_par[0]) {
1487 case 1: /* set color for underline mode */
1488 if (vc->vc_can_do_color &&
1489 vc->vc_par[1] < 16) {
1490 vc->vc_ulcolor = color_table[vc->vc_par[1]];
1491 if (vc->vc_underline)
1492 update_attr(vc);
1493 }
1494 break;
1495 case 2: /* set color for half intensity mode */
1496 if (vc->vc_can_do_color &&
1497 vc->vc_par[1] < 16) {
1498 vc->vc_halfcolor = color_table[vc->vc_par[1]];
1499 if (vc->vc_intensity == 0)
1500 update_attr(vc);
1501 }
1502 break;
1503 case 8: /* store colors as defaults */
1504 vc->vc_def_color = vc->vc_attr;
1505 if (vc->vc_hi_font_mask == 0x100)
1506 vc->vc_def_color >>= 1;
1507 default_attr(vc);
1508 update_attr(vc);
1509 break;
1510 case 9: /* set blanking interval */
1511 blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60;
1512 poke_blanked_console();
1513 break;
1514 case 10: /* set bell frequency in Hz */
1515 if (vc->vc_npar >= 1)
1516 vc->vc_bell_pitch = vc->vc_par[1];
1517 else
1518 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1519 break;
1520 case 11: /* set bell duration in msec */
1521 if (vc->vc_npar >= 1)
1522 vc->vc_bell_duration = (vc->vc_par[1] < 2000) ?
1523 vc->vc_par[1] * HZ / 1000 : 0;
1524 else
1525 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1526 break;
1527 case 12: /* bring specified console to the front */
1528 if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1))
1529 set_console(vc->vc_par[1] - 1);
1530 break;
1531 case 13: /* unblank the screen */
1532 poke_blanked_console();
1533 break;
1534 case 14: /* set vesa powerdown interval */
1535 vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1536 break;
1537 case 15: /* activate the previous console */
1538 set_console(last_console);
1539 break;
1540 }
1541 }
1542
1543 /* console_sem is held */
1544 static void csi_at(struct vc_data *vc, unsigned int nr)
1545 {
1546 if (nr > vc->vc_cols - vc->vc_x)
1547 nr = vc->vc_cols - vc->vc_x;
1548 else if (!nr)
1549 nr = 1;
1550 insert_char(vc, nr);
1551 }
1552
1553 /* console_sem is held */
1554 static void csi_L(struct vc_data *vc, unsigned int nr)
1555 {
1556 if (nr > vc->vc_rows - vc->vc_y)
1557 nr = vc->vc_rows - vc->vc_y;
1558 else if (!nr)
1559 nr = 1;
1560 scrdown(vc, vc->vc_y, vc->vc_bottom, nr);
1561 vc->vc_need_wrap = 0;
1562 }
1563
1564 /* console_sem is held */
1565 static void csi_P(struct vc_data *vc, unsigned int nr)
1566 {
1567 if (nr > vc->vc_cols - vc->vc_x)
1568 nr = vc->vc_cols - vc->vc_x;
1569 else if (!nr)
1570 nr = 1;
1571 delete_char(vc, nr);
1572 }
1573
1574 /* console_sem is held */
1575 static void csi_M(struct vc_data *vc, unsigned int nr)
1576 {
1577 if (nr > vc->vc_rows - vc->vc_y)
1578 nr = vc->vc_rows - vc->vc_y;
1579 else if (!nr)
1580 nr=1;
1581 scrup(vc, vc->vc_y, vc->vc_bottom, nr);
1582 vc->vc_need_wrap = 0;
1583 }
1584
1585 /* console_sem is held (except via vc_init->reset_terminal */
1586 static void save_cur(struct vc_data *vc)
1587 {
1588 vc->vc_saved_x = vc->vc_x;
1589 vc->vc_saved_y = vc->vc_y;
1590 vc->vc_s_intensity = vc->vc_intensity;
1591 vc->vc_s_italic = vc->vc_italic;
1592 vc->vc_s_underline = vc->vc_underline;
1593 vc->vc_s_blink = vc->vc_blink;
1594 vc->vc_s_reverse = vc->vc_reverse;
1595 vc->vc_s_charset = vc->vc_charset;
1596 vc->vc_s_color = vc->vc_color;
1597 vc->vc_saved_G0 = vc->vc_G0_charset;
1598 vc->vc_saved_G1 = vc->vc_G1_charset;
1599 }
1600
1601 /* console_sem is held */
1602 static void restore_cur(struct vc_data *vc)
1603 {
1604 gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y);
1605 vc->vc_intensity = vc->vc_s_intensity;
1606 vc->vc_italic = vc->vc_s_italic;
1607 vc->vc_underline = vc->vc_s_underline;
1608 vc->vc_blink = vc->vc_s_blink;
1609 vc->vc_reverse = vc->vc_s_reverse;
1610 vc->vc_charset = vc->vc_s_charset;
1611 vc->vc_color = vc->vc_s_color;
1612 vc->vc_G0_charset = vc->vc_saved_G0;
1613 vc->vc_G1_charset = vc->vc_saved_G1;
1614 vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc);
1615 update_attr(vc);
1616 vc->vc_need_wrap = 0;
1617 }
1618
1619 enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey,
1620 EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd,
1621 ESpalette };
1622
1623 /* console_sem is held (except via vc_init()) */
1624 static void reset_terminal(struct vc_data *vc, int do_clear)
1625 {
1626 vc->vc_top = 0;
1627 vc->vc_bottom = vc->vc_rows;
1628 vc->vc_state = ESnormal;
1629 vc->vc_ques = 0;
1630 vc->vc_translate = set_translate(LAT1_MAP, vc);
1631 vc->vc_G0_charset = LAT1_MAP;
1632 vc->vc_G1_charset = GRAF_MAP;
1633 vc->vc_charset = 0;
1634 vc->vc_need_wrap = 0;
1635 vc->vc_report_mouse = 0;
1636 vc->vc_utf = default_utf8;
1637 vc->vc_utf_count = 0;
1638
1639 vc->vc_disp_ctrl = 0;
1640 vc->vc_toggle_meta = 0;
1641
1642 vc->vc_decscnm = 0;
1643 vc->vc_decom = 0;
1644 vc->vc_decawm = 1;
1645 vc->vc_deccm = global_cursor_default;
1646 vc->vc_decim = 0;
1647
1648 set_kbd(vc, decarm);
1649 clr_kbd(vc, decckm);
1650 clr_kbd(vc, kbdapplic);
1651 clr_kbd(vc, lnm);
1652 kbd_table[vc->vc_num].lockstate = 0;
1653 kbd_table[vc->vc_num].slockstate = 0;
1654 kbd_table[vc->vc_num].ledmode = LED_SHOW_FLAGS;
1655 kbd_table[vc->vc_num].ledflagstate = kbd_table[vc->vc_num].default_ledflagstate;
1656 /* do not do set_leds here because this causes an endless tasklet loop
1657 when the keyboard hasn't been initialized yet */
1658
1659 vc->vc_cursor_type = cur_default;
1660 vc->vc_complement_mask = vc->vc_s_complement_mask;
1661
1662 default_attr(vc);
1663 update_attr(vc);
1664
1665 vc->vc_tab_stop[0] = 0x01010100;
1666 vc->vc_tab_stop[1] =
1667 vc->vc_tab_stop[2] =
1668 vc->vc_tab_stop[3] =
1669 vc->vc_tab_stop[4] =
1670 vc->vc_tab_stop[5] =
1671 vc->vc_tab_stop[6] =
1672 vc->vc_tab_stop[7] = 0x01010101;
1673
1674 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1675 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1676
1677 gotoxy(vc, 0, 0);
1678 save_cur(vc);
1679 if (do_clear)
1680 csi_J(vc, 2);
1681 }
1682
1683 /* console_sem is held */
1684 static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
1685 {
1686 /*
1687 * Control characters can be used in the _middle_
1688 * of an escape sequence.
1689 */
1690 switch (c) {
1691 case 0:
1692 return;
1693 case 7:
1694 if (vc->vc_bell_duration)
1695 kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration);
1696 return;
1697 case 8:
1698 bs(vc);
1699 return;
1700 case 9:
1701 vc->vc_pos -= (vc->vc_x << 1);
1702 while (vc->vc_x < vc->vc_cols - 1) {
1703 vc->vc_x++;
1704 if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31)))
1705 break;
1706 }
1707 vc->vc_pos += (vc->vc_x << 1);
1708 notify_write(vc, '\t');
1709 return;
1710 case 10: case 11: case 12:
1711 lf(vc);
1712 if (!is_kbd(vc, lnm))
1713 return;
1714 case 13:
1715 cr(vc);
1716 return;
1717 case 14:
1718 vc->vc_charset = 1;
1719 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1720 vc->vc_disp_ctrl = 1;
1721 return;
1722 case 15:
1723 vc->vc_charset = 0;
1724 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1725 vc->vc_disp_ctrl = 0;
1726 return;
1727 case 24: case 26:
1728 vc->vc_state = ESnormal;
1729 return;
1730 case 27:
1731 vc->vc_state = ESesc;
1732 return;
1733 case 127:
1734 del(vc);
1735 return;
1736 case 128+27:
1737 vc->vc_state = ESsquare;
1738 return;
1739 }
1740 switch(vc->vc_state) {
1741 case ESesc:
1742 vc->vc_state = ESnormal;
1743 switch (c) {
1744 case '[':
1745 vc->vc_state = ESsquare;
1746 return;
1747 case ']':
1748 vc->vc_state = ESnonstd;
1749 return;
1750 case '%':
1751 vc->vc_state = ESpercent;
1752 return;
1753 case 'E':
1754 cr(vc);
1755 lf(vc);
1756 return;
1757 case 'M':
1758 ri(vc);
1759 return;
1760 case 'D':
1761 lf(vc);
1762 return;
1763 case 'H':
1764 vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31));
1765 return;
1766 case 'Z':
1767 respond_ID(tty);
1768 return;
1769 case '7':
1770 save_cur(vc);
1771 return;
1772 case '8':
1773 restore_cur(vc);
1774 return;
1775 case '(':
1776 vc->vc_state = ESsetG0;
1777 return;
1778 case ')':
1779 vc->vc_state = ESsetG1;
1780 return;
1781 case '#':
1782 vc->vc_state = EShash;
1783 return;
1784 case 'c':
1785 reset_terminal(vc, 1);
1786 return;
1787 case '>': /* Numeric keypad */
1788 clr_kbd(vc, kbdapplic);
1789 return;
1790 case '=': /* Appl. keypad */
1791 set_kbd(vc, kbdapplic);
1792 return;
1793 }
1794 return;
1795 case ESnonstd:
1796 if (c=='P') { /* palette escape sequence */
1797 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1798 vc->vc_par[vc->vc_npar] = 0;
1799 vc->vc_npar = 0;
1800 vc->vc_state = ESpalette;
1801 return;
1802 } else if (c=='R') { /* reset palette */
1803 reset_palette(vc);
1804 vc->vc_state = ESnormal;
1805 } else
1806 vc->vc_state = ESnormal;
1807 return;
1808 case ESpalette:
1809 if (isxdigit(c)) {
1810 vc->vc_par[vc->vc_npar++] = hex_to_bin(c);
1811 if (vc->vc_npar == 7) {
1812 int i = vc->vc_par[0] * 3, j = 1;
1813 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1814 vc->vc_palette[i++] += vc->vc_par[j++];
1815 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1816 vc->vc_palette[i++] += vc->vc_par[j++];
1817 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1818 vc->vc_palette[i] += vc->vc_par[j];
1819 set_palette(vc);
1820 vc->vc_state = ESnormal;
1821 }
1822 } else
1823 vc->vc_state = ESnormal;
1824 return;
1825 case ESsquare:
1826 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1827 vc->vc_par[vc->vc_npar] = 0;
1828 vc->vc_npar = 0;
1829 vc->vc_state = ESgetpars;
1830 if (c == '[') { /* Function key */
1831 vc->vc_state=ESfunckey;
1832 return;
1833 }
1834 vc->vc_ques = (c == '?');
1835 if (vc->vc_ques)
1836 return;
1837 case ESgetpars:
1838 if (c == ';' && vc->vc_npar < NPAR - 1) {
1839 vc->vc_npar++;
1840 return;
1841 } else if (c>='0' && c<='9') {
1842 vc->vc_par[vc->vc_npar] *= 10;
1843 vc->vc_par[vc->vc_npar] += c - '0';
1844 return;
1845 } else
1846 vc->vc_state = ESgotpars;
1847 case ESgotpars:
1848 vc->vc_state = ESnormal;
1849 switch(c) {
1850 case 'h':
1851 set_mode(vc, 1);
1852 return;
1853 case 'l':
1854 set_mode(vc, 0);
1855 return;
1856 case 'c':
1857 if (vc->vc_ques) {
1858 if (vc->vc_par[0])
1859 vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16);
1860 else
1861 vc->vc_cursor_type = cur_default;
1862 return;
1863 }
1864 break;
1865 case 'm':
1866 if (vc->vc_ques) {
1867 clear_selection();
1868 if (vc->vc_par[0])
1869 vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1];
1870 else
1871 vc->vc_complement_mask = vc->vc_s_complement_mask;
1872 return;
1873 }
1874 break;
1875 case 'n':
1876 if (!vc->vc_ques) {
1877 if (vc->vc_par[0] == 5)
1878 status_report(tty);
1879 else if (vc->vc_par[0] == 6)
1880 cursor_report(vc, tty);
1881 }
1882 return;
1883 }
1884 if (vc->vc_ques) {
1885 vc->vc_ques = 0;
1886 return;
1887 }
1888 switch(c) {
1889 case 'G': case '`':
1890 if (vc->vc_par[0])
1891 vc->vc_par[0]--;
1892 gotoxy(vc, vc->vc_par[0], vc->vc_y);
1893 return;
1894 case 'A':
1895 if (!vc->vc_par[0])
1896 vc->vc_par[0]++;
1897 gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]);
1898 return;
1899 case 'B': case 'e':
1900 if (!vc->vc_par[0])
1901 vc->vc_par[0]++;
1902 gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]);
1903 return;
1904 case 'C': case 'a':
1905 if (!vc->vc_par[0])
1906 vc->vc_par[0]++;
1907 gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y);
1908 return;
1909 case 'D':
1910 if (!vc->vc_par[0])
1911 vc->vc_par[0]++;
1912 gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y);
1913 return;
1914 case 'E':
1915 if (!vc->vc_par[0])
1916 vc->vc_par[0]++;
1917 gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]);
1918 return;
1919 case 'F':
1920 if (!vc->vc_par[0])
1921 vc->vc_par[0]++;
1922 gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]);
1923 return;
1924 case 'd':
1925 if (vc->vc_par[0])
1926 vc->vc_par[0]--;
1927 gotoxay(vc, vc->vc_x ,vc->vc_par[0]);
1928 return;
1929 case 'H': case 'f':
1930 if (vc->vc_par[0])
1931 vc->vc_par[0]--;
1932 if (vc->vc_par[1])
1933 vc->vc_par[1]--;
1934 gotoxay(vc, vc->vc_par[1], vc->vc_par[0]);
1935 return;
1936 case 'J':
1937 csi_J(vc, vc->vc_par[0]);
1938 return;
1939 case 'K':
1940 csi_K(vc, vc->vc_par[0]);
1941 return;
1942 case 'L':
1943 csi_L(vc, vc->vc_par[0]);
1944 return;
1945 case 'M':
1946 csi_M(vc, vc->vc_par[0]);
1947 return;
1948 case 'P':
1949 csi_P(vc, vc->vc_par[0]);
1950 return;
1951 case 'c':
1952 if (!vc->vc_par[0])
1953 respond_ID(tty);
1954 return;
1955 case 'g':
1956 if (!vc->vc_par[0])
1957 vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31));
1958 else if (vc->vc_par[0] == 3) {
1959 vc->vc_tab_stop[0] =
1960 vc->vc_tab_stop[1] =
1961 vc->vc_tab_stop[2] =
1962 vc->vc_tab_stop[3] =
1963 vc->vc_tab_stop[4] =
1964 vc->vc_tab_stop[5] =
1965 vc->vc_tab_stop[6] =
1966 vc->vc_tab_stop[7] = 0;
1967 }
1968 return;
1969 case 'm':
1970 csi_m(vc);
1971 return;
1972 case 'q': /* DECLL - but only 3 leds */
1973 /* map 0,1,2,3 to 0,1,2,4 */
1974 if (vc->vc_par[0] < 4)
1975 setledstate(kbd_table + vc->vc_num,
1976 (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4);
1977 return;
1978 case 'r':
1979 if (!vc->vc_par[0])
1980 vc->vc_par[0]++;
1981 if (!vc->vc_par[1])
1982 vc->vc_par[1] = vc->vc_rows;
1983 /* Minimum allowed region is 2 lines */
1984 if (vc->vc_par[0] < vc->vc_par[1] &&
1985 vc->vc_par[1] <= vc->vc_rows) {
1986 vc->vc_top = vc->vc_par[0] - 1;
1987 vc->vc_bottom = vc->vc_par[1];
1988 gotoxay(vc, 0, 0);
1989 }
1990 return;
1991 case 's':
1992 save_cur(vc);
1993 return;
1994 case 'u':
1995 restore_cur(vc);
1996 return;
1997 case 'X':
1998 csi_X(vc, vc->vc_par[0]);
1999 return;
2000 case '@':
2001 csi_at(vc, vc->vc_par[0]);
2002 return;
2003 case ']': /* setterm functions */
2004 setterm_command(vc);
2005 return;
2006 }
2007 return;
2008 case ESpercent:
2009 vc->vc_state = ESnormal;
2010 switch (c) {
2011 case '@': /* defined in ISO 2022 */
2012 vc->vc_utf = 0;
2013 return;
2014 case 'G': /* prelim official escape code */
2015 case '8': /* retained for compatibility */
2016 vc->vc_utf = 1;
2017 return;
2018 }
2019 return;
2020 case ESfunckey:
2021 vc->vc_state = ESnormal;
2022 return;
2023 case EShash:
2024 vc->vc_state = ESnormal;
2025 if (c == '8') {
2026 /* DEC screen alignment test. kludge :-) */
2027 vc->vc_video_erase_char =
2028 (vc->vc_video_erase_char & 0xff00) | 'E';
2029 csi_J(vc, 2);
2030 vc->vc_video_erase_char =
2031 (vc->vc_video_erase_char & 0xff00) | ' ';
2032 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
2033 }
2034 return;
2035 case ESsetG0:
2036 if (c == '0')
2037 vc->vc_G0_charset = GRAF_MAP;
2038 else if (c == 'B')
2039 vc->vc_G0_charset = LAT1_MAP;
2040 else if (c == 'U')
2041 vc->vc_G0_charset = IBMPC_MAP;
2042 else if (c == 'K')
2043 vc->vc_G0_charset = USER_MAP;
2044 if (vc->vc_charset == 0)
2045 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
2046 vc->vc_state = ESnormal;
2047 return;
2048 case ESsetG1:
2049 if (c == '0')
2050 vc->vc_G1_charset = GRAF_MAP;
2051 else if (c == 'B')
2052 vc->vc_G1_charset = LAT1_MAP;
2053 else if (c == 'U')
2054 vc->vc_G1_charset = IBMPC_MAP;
2055 else if (c == 'K')
2056 vc->vc_G1_charset = USER_MAP;
2057 if (vc->vc_charset == 1)
2058 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
2059 vc->vc_state = ESnormal;
2060 return;
2061 default:
2062 vc->vc_state = ESnormal;
2063 }
2064 }
2065
2066 /* This is a temporary buffer used to prepare a tty console write
2067 * so that we can easily avoid touching user space while holding the
2068 * console spinlock. It is allocated in con_init and is shared by
2069 * this code and the vc_screen read/write tty calls.
2070 *
2071 * We have to allocate this statically in the kernel data section
2072 * since console_init (and thus con_init) are called before any
2073 * kernel memory allocation is available.
2074 */
2075 char con_buf[CON_BUF_SIZE];
2076 DEFINE_MUTEX(con_buf_mtx);
2077
2078 /* is_double_width() is based on the wcwidth() implementation by
2079 * Markus Kuhn -- 2007-05-26 (Unicode 5.0)
2080 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
2081 */
2082 struct interval {
2083 uint32_t first;
2084 uint32_t last;
2085 };
2086
2087 static int bisearch(uint32_t ucs, const struct interval *table, int max)
2088 {
2089 int min = 0;
2090 int mid;
2091
2092 if (ucs < table[0].first || ucs > table[max].last)
2093 return 0;
2094 while (max >= min) {
2095 mid = (min + max) / 2;
2096 if (ucs > table[mid].last)
2097 min = mid + 1;
2098 else if (ucs < table[mid].first)
2099 max = mid - 1;
2100 else
2101 return 1;
2102 }
2103 return 0;
2104 }
2105
2106 static int is_double_width(uint32_t ucs)
2107 {
2108 static const struct interval double_width[] = {
2109 { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E },
2110 { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF },
2111 { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 },
2112 { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD }
2113 };
2114 return bisearch(ucs, double_width, ARRAY_SIZE(double_width) - 1);
2115 }
2116
2117 /* acquires console_sem */
2118 static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2119 {
2120 #ifdef VT_BUF_VRAM_ONLY
2121 #define FLUSH do { } while(0);
2122 #else
2123 #define FLUSH if (draw_x >= 0) { \
2124 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
2125 draw_x = -1; \
2126 }
2127 #endif
2128
2129 int c, tc, ok, n = 0, draw_x = -1;
2130 unsigned int currcons;
2131 unsigned long draw_from = 0, draw_to = 0;
2132 struct vc_data *vc;
2133 unsigned char vc_attr;
2134 struct vt_notifier_param param;
2135 uint8_t rescan;
2136 uint8_t inverse;
2137 uint8_t width;
2138 u16 himask, charmask;
2139
2140 if (in_interrupt())
2141 return count;
2142
2143 might_sleep();
2144
2145 acquire_console_sem();
2146 vc = tty->driver_data;
2147 if (vc == NULL) {
2148 printk(KERN_ERR "vt: argh, driver_data is NULL !\n");
2149 release_console_sem();
2150 return 0;
2151 }
2152
2153 currcons = vc->vc_num;
2154 if (!vc_cons_allocated(currcons)) {
2155 /* could this happen? */
2156 printk_once("con_write: tty %d not allocated\n", currcons+1);
2157 release_console_sem();
2158 return 0;
2159 }
2160
2161 himask = vc->vc_hi_font_mask;
2162 charmask = himask ? 0x1ff : 0xff;
2163
2164 /* undraw cursor first */
2165 if (IS_FG(vc))
2166 hide_cursor(vc);
2167
2168 param.vc = vc;
2169
2170 while (!tty->stopped && count) {
2171 int orig = *buf;
2172 c = orig;
2173 buf++;
2174 n++;
2175 count--;
2176 rescan = 0;
2177 inverse = 0;
2178 width = 1;
2179
2180 /* Do no translation at all in control states */
2181 if (vc->vc_state != ESnormal) {
2182 tc = c;
2183 } else if (vc->vc_utf && !vc->vc_disp_ctrl) {
2184 /* Combine UTF-8 into Unicode in vc_utf_char.
2185 * vc_utf_count is the number of continuation bytes still
2186 * expected to arrive.
2187 * vc_npar is the number of continuation bytes arrived so
2188 * far
2189 */
2190 rescan_last_byte:
2191 if ((c & 0xc0) == 0x80) {
2192 /* Continuation byte received */
2193 static const uint32_t utf8_length_changes[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff };
2194 if (vc->vc_utf_count) {
2195 vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f);
2196 vc->vc_npar++;
2197 if (--vc->vc_utf_count) {
2198 /* Still need some bytes */
2199 continue;
2200 }
2201 /* Got a whole character */
2202 c = vc->vc_utf_char;
2203 /* Reject overlong sequences */
2204 if (c <= utf8_length_changes[vc->vc_npar - 1] ||
2205 c > utf8_length_changes[vc->vc_npar])
2206 c = 0xfffd;
2207 } else {
2208 /* Unexpected continuation byte */
2209 vc->vc_utf_count = 0;
2210 c = 0xfffd;
2211 }
2212 } else {
2213 /* Single ASCII byte or first byte of a sequence received */
2214 if (vc->vc_utf_count) {
2215 /* Continuation byte expected */
2216 rescan = 1;
2217 vc->vc_utf_count = 0;
2218 c = 0xfffd;
2219 } else if (c > 0x7f) {
2220 /* First byte of a multibyte sequence received */
2221 vc->vc_npar = 0;
2222 if ((c & 0xe0) == 0xc0) {
2223 vc->vc_utf_count = 1;
2224 vc->vc_utf_char = (c & 0x1f);
2225 } else if ((c & 0xf0) == 0xe0) {
2226 vc->vc_utf_count = 2;
2227 vc->vc_utf_char = (c & 0x0f);
2228 } else if ((c & 0xf8) == 0xf0) {
2229 vc->vc_utf_count = 3;
2230 vc->vc_utf_char = (c & 0x07);
2231 } else if ((c & 0xfc) == 0xf8) {
2232 vc->vc_utf_count = 4;
2233 vc->vc_utf_char = (c & 0x03);
2234 } else if ((c & 0xfe) == 0xfc) {
2235 vc->vc_utf_count = 5;
2236 vc->vc_utf_char = (c & 0x01);
2237 } else {
2238 /* 254 and 255 are invalid */
2239 c = 0xfffd;
2240 }
2241 if (vc->vc_utf_count) {
2242 /* Still need some bytes */
2243 continue;
2244 }
2245 }
2246 /* Nothing to do if an ASCII byte was received */
2247 }
2248 /* End of UTF-8 decoding. */
2249 /* c is the received character, or U+FFFD for invalid sequences. */
2250 /* Replace invalid Unicode code points with U+FFFD too */
2251 if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff)
2252 c = 0xfffd;
2253 tc = c;
2254 } else { /* no utf or alternate charset mode */
2255 tc = vc_translate(vc, c);
2256 }
2257
2258 param.c = tc;
2259 if (atomic_notifier_call_chain(&vt_notifier_list, VT_PREWRITE,
2260 &param) == NOTIFY_STOP)
2261 continue;
2262
2263 /* If the original code was a control character we
2264 * only allow a glyph to be displayed if the code is
2265 * not normally used (such as for cursor movement) or
2266 * if the disp_ctrl mode has been explicitly enabled.
2267 * Certain characters (as given by the CTRL_ALWAYS
2268 * bitmap) are always displayed as control characters,
2269 * as the console would be pretty useless without
2270 * them; to display an arbitrary font position use the
2271 * direct-to-font zone in UTF-8 mode.
2272 */
2273 ok = tc && (c >= 32 ||
2274 !(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 :
2275 vc->vc_utf || ((CTRL_ACTION >> c) & 1)))
2276 && (c != 127 || vc->vc_disp_ctrl)
2277 && (c != 128+27);
2278
2279 if (vc->vc_state == ESnormal && ok) {
2280 if (vc->vc_utf && !vc->vc_disp_ctrl) {
2281 if (is_double_width(c))
2282 width = 2;
2283 }
2284 /* Now try to find out how to display it */
2285 tc = conv_uni_to_pc(vc, tc);
2286 if (tc & ~charmask) {
2287 if (tc == -1 || tc == -2) {
2288 continue; /* nothing to display */
2289 }
2290 /* Glyph not found */
2291 if ((!(vc->vc_utf && !vc->vc_disp_ctrl) || c < 128) && !(c & ~charmask)) {
2292 /* In legacy mode use the glyph we get by a 1:1 mapping.
2293 This would make absolutely no sense with Unicode in mind,
2294 but do this for ASCII characters since a font may lack
2295 Unicode mapping info and we don't want to end up with
2296 having question marks only. */
2297 tc = c;
2298 } else {
2299 /* Display U+FFFD. If it's not found, display an inverse question mark. */
2300 tc = conv_uni_to_pc(vc, 0xfffd);
2301 if (tc < 0) {
2302 inverse = 1;
2303 tc = conv_uni_to_pc(vc, '?');
2304 if (tc < 0) tc = '?';
2305 }
2306 }
2307 }
2308
2309 if (!inverse) {
2310 vc_attr = vc->vc_attr;
2311 } else {
2312 /* invert vc_attr */
2313 if (!vc->vc_can_do_color) {
2314 vc_attr = (vc->vc_attr) ^ 0x08;
2315 } else if (vc->vc_hi_font_mask == 0x100) {
2316 vc_attr = ((vc->vc_attr) & 0x11) | (((vc->vc_attr) & 0xe0) >> 4) | (((vc->vc_attr) & 0x0e) << 4);
2317 } else {
2318 vc_attr = ((vc->vc_attr) & 0x88) | (((vc->vc_attr) & 0x70) >> 4) | (((vc->vc_attr) & 0x07) << 4);
2319 }
2320 FLUSH
2321 }
2322
2323 while (1) {
2324 if (vc->vc_need_wrap || vc->vc_decim)
2325 FLUSH
2326 if (vc->vc_need_wrap) {
2327 cr(vc);
2328 lf(vc);
2329 }
2330 if (vc->vc_decim)
2331 insert_char(vc, 1);
2332 scr_writew(himask ?
2333 ((vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) :
2334 (vc_attr << 8) + tc,
2335 (u16 *) vc->vc_pos);
2336 if (DO_UPDATE(vc) && draw_x < 0) {
2337 draw_x = vc->vc_x;
2338 draw_from = vc->vc_pos;
2339 }
2340 if (vc->vc_x == vc->vc_cols - 1) {
2341 vc->vc_need_wrap = vc->vc_decawm;
2342 draw_to = vc->vc_pos + 2;
2343 } else {
2344 vc->vc_x++;
2345 draw_to = (vc->vc_pos += 2);
2346 }
2347
2348 if (!--width) break;
2349
2350 tc = conv_uni_to_pc(vc, ' '); /* A space is printed in the second column */
2351 if (tc < 0) tc = ' ';
2352 }
2353 notify_write(vc, c);
2354
2355 if (inverse) {
2356 FLUSH
2357 }
2358
2359 if (rescan) {
2360 rescan = 0;
2361 inverse = 0;
2362 width = 1;
2363 c = orig;
2364 goto rescan_last_byte;
2365 }
2366 continue;
2367 }
2368 FLUSH
2369 do_con_trol(tty, vc, orig);
2370 }
2371 FLUSH
2372 console_conditional_schedule();
2373 release_console_sem();
2374 notify_update(vc);
2375 return n;
2376 #undef FLUSH
2377 }
2378
2379 /*
2380 * This is the console switching callback.
2381 *
2382 * Doing console switching in a process context allows
2383 * us to do the switches asynchronously (needed when we want
2384 * to switch due to a keyboard interrupt). Synchronization
2385 * with other console code and prevention of re-entrancy is
2386 * ensured with console_sem.
2387 */
2388 static void console_callback(struct work_struct *ignored)
2389 {
2390 acquire_console_sem();
2391
2392 if (want_console >= 0) {
2393 if (want_console != fg_console &&
2394 vc_cons_allocated(want_console)) {
2395 hide_cursor(vc_cons[fg_console].d);
2396 change_console(vc_cons[want_console].d);
2397 /* we only changed when the console had already
2398 been allocated - a new console is not created
2399 in an interrupt routine */
2400 }
2401 want_console = -1;
2402 }
2403 if (do_poke_blanked_console) { /* do not unblank for a LED change */
2404 do_poke_blanked_console = 0;
2405 poke_blanked_console();
2406 }
2407 if (scrollback_delta) {
2408 struct vc_data *vc = vc_cons[fg_console].d;
2409 clear_selection();
2410 if (vc->vc_mode == KD_TEXT)
2411 vc->vc_sw->con_scrolldelta(vc, scrollback_delta);
2412 scrollback_delta = 0;
2413 }
2414 if (blank_timer_expired) {
2415 do_blank_screen(0);
2416 blank_timer_expired = 0;
2417 }
2418 notify_update(vc_cons[fg_console].d);
2419
2420 release_console_sem();
2421 }
2422
2423 int set_console(int nr)
2424 {
2425 struct vc_data *vc = vc_cons[fg_console].d;
2426
2427 if (!vc_cons_allocated(nr) || vt_dont_switch ||
2428 (vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) {
2429
2430 /*
2431 * Console switch will fail in console_callback() or
2432 * change_console() so there is no point scheduling
2433 * the callback
2434 *
2435 * Existing set_console() users don't check the return
2436 * value so this shouldn't break anything
2437 */
2438 return -EINVAL;
2439 }
2440
2441 want_console = nr;
2442 schedule_console_callback();
2443
2444 return 0;
2445 }
2446
2447 struct tty_driver *console_driver;
2448
2449 #ifdef CONFIG_VT_CONSOLE
2450
2451 /**
2452 * vt_kmsg_redirect() - Sets/gets the kernel message console
2453 * @new: The new virtual terminal number or -1 if the console should stay
2454 * unchanged
2455 *
2456 * By default, the kernel messages are always printed on the current virtual
2457 * console. However, the user may modify that default with the
2458 * TIOCL_SETKMSGREDIRECT ioctl call.
2459 *
2460 * This function sets the kernel message console to be @new. It returns the old
2461 * virtual console number. The virtual terminal number 0 (both as parameter and
2462 * return value) means no redirection (i.e. always printed on the currently
2463 * active console).
2464 *
2465 * The parameter -1 means that only the current console is returned, but the
2466 * value is not modified. You may use the macro vt_get_kmsg_redirect() in that
2467 * case to make the code more understandable.
2468 *
2469 * When the kernel is compiled without CONFIG_VT_CONSOLE, this function ignores
2470 * the parameter and always returns 0.
2471 */
2472 int vt_kmsg_redirect(int new)
2473 {
2474 static int kmsg_con;
2475
2476 if (new != -1)
2477 return xchg(&kmsg_con, new);
2478 else
2479 return kmsg_con;
2480 }
2481
2482 /*
2483 * Console on virtual terminal
2484 *
2485 * The console must be locked when we get here.
2486 */
2487
2488 static void vt_console_print(struct console *co, const char *b, unsigned count)
2489 {
2490 struct vc_data *vc = vc_cons[fg_console].d;
2491 unsigned char c;
2492 static DEFINE_SPINLOCK(printing_lock);
2493 const ushort *start;
2494 ushort cnt = 0;
2495 ushort myx;
2496 int kmsg_console;
2497
2498 /* console busy or not yet initialized */
2499 if (!printable)
2500 return;
2501 if (!spin_trylock(&printing_lock))
2502 return;
2503
2504 kmsg_console = vt_get_kmsg_redirect();
2505 if (kmsg_console && vc_cons_allocated(kmsg_console - 1))
2506 vc = vc_cons[kmsg_console - 1].d;
2507
2508 /* read `x' only after setting currcons properly (otherwise
2509 the `x' macro will read the x of the foreground console). */
2510 myx = vc->vc_x;
2511
2512 if (!vc_cons_allocated(fg_console)) {
2513 /* impossible */
2514 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2515 goto quit;
2516 }
2517
2518 if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc))
2519 goto quit;
2520
2521 /* undraw cursor first */
2522 if (IS_FG(vc))
2523 hide_cursor(vc);
2524
2525 start = (ushort *)vc->vc_pos;
2526
2527 /* Contrived structure to try to emulate original need_wrap behaviour
2528 * Problems caused when we have need_wrap set on '\n' character */
2529 while (count--) {
2530 c = *b++;
2531 if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) {
2532 if (cnt > 0) {
2533 if (CON_IS_VISIBLE(vc))
2534 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2535 vc->vc_x += cnt;
2536 if (vc->vc_need_wrap)
2537 vc->vc_x--;
2538 cnt = 0;
2539 }
2540 if (c == 8) { /* backspace */
2541 bs(vc);
2542 start = (ushort *)vc->vc_pos;
2543 myx = vc->vc_x;
2544 continue;
2545 }
2546 if (c != 13)
2547 lf(vc);
2548 cr(vc);
2549 start = (ushort *)vc->vc_pos;
2550 myx = vc->vc_x;
2551 if (c == 10 || c == 13)
2552 continue;
2553 }
2554 scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos);
2555 notify_write(vc, c);
2556 cnt++;
2557 if (myx == vc->vc_cols - 1) {
2558 vc->vc_need_wrap = 1;
2559 continue;
2560 }
2561 vc->vc_pos += 2;
2562 myx++;
2563 }
2564 if (cnt > 0) {
2565 if (CON_IS_VISIBLE(vc))
2566 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2567 vc->vc_x += cnt;
2568 if (vc->vc_x == vc->vc_cols) {
2569 vc->vc_x--;
2570 vc->vc_need_wrap = 1;
2571 }
2572 }
2573 set_cursor(vc);
2574 notify_update(vc);
2575
2576 quit:
2577 spin_unlock(&printing_lock);
2578 }
2579
2580 static struct tty_driver *vt_console_device(struct console *c, int *index)
2581 {
2582 *index = c->index ? c->index-1 : fg_console;
2583 return console_driver;
2584 }
2585
2586 static struct console vt_console_driver = {
2587 .name = "tty",
2588 .write = vt_console_print,
2589 .device = vt_console_device,
2590 .unblank = unblank_screen,
2591 .flags = CON_PRINTBUFFER,
2592 .index = -1,
2593 };
2594 #endif
2595
2596 /*
2597 * Handling of Linux-specific VC ioctls
2598 */
2599
2600 /*
2601 * Generally a bit racy with respect to console_sem().
2602 *
2603 * There are some functions which don't need it.
2604 *
2605 * There are some functions which can sleep for arbitrary periods
2606 * (paste_selection) but we don't need the lock there anyway.
2607 *
2608 * set_selection has locking, and definitely needs it
2609 */
2610
2611 int tioclinux(struct tty_struct *tty, unsigned long arg)
2612 {
2613 char type, data;
2614 char __user *p = (char __user *)arg;
2615 int lines;
2616 int ret;
2617
2618 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN))
2619 return -EPERM;
2620 if (get_user(type, p))
2621 return -EFAULT;
2622 ret = 0;
2623
2624 switch (type)
2625 {
2626 case TIOCL_SETSEL:
2627 acquire_console_sem();
2628 ret = set_selection((struct tiocl_selection __user *)(p+1), tty);
2629 release_console_sem();
2630 break;
2631 case TIOCL_PASTESEL:
2632 ret = paste_selection(tty);
2633 break;
2634 case TIOCL_UNBLANKSCREEN:
2635 acquire_console_sem();
2636 unblank_screen();
2637 release_console_sem();
2638 break;
2639 case TIOCL_SELLOADLUT:
2640 ret = sel_loadlut(p);
2641 break;
2642 case TIOCL_GETSHIFTSTATE:
2643
2644 /*
2645 * Make it possible to react to Shift+Mousebutton.
2646 * Note that 'shift_state' is an undocumented
2647 * kernel-internal variable; programs not closely
2648 * related to the kernel should not use this.
2649 */
2650 data = shift_state;
2651 ret = __put_user(data, p);
2652 break;
2653 case TIOCL_GETMOUSEREPORTING:
2654 data = mouse_reporting();
2655 ret = __put_user(data, p);
2656 break;
2657 case TIOCL_SETVESABLANK:
2658 ret = set_vesa_blanking(p);
2659 break;
2660 case TIOCL_GETKMSGREDIRECT:
2661 data = vt_get_kmsg_redirect();
2662 ret = __put_user(data, p);
2663 break;
2664 case TIOCL_SETKMSGREDIRECT:
2665 if (!capable(CAP_SYS_ADMIN)) {
2666 ret = -EPERM;
2667 } else {
2668 if (get_user(data, p+1))
2669 ret = -EFAULT;
2670 else
2671 vt_kmsg_redirect(data);
2672 }
2673 break;
2674 case TIOCL_GETFGCONSOLE:
2675 ret = fg_console;
2676 break;
2677 case TIOCL_SCROLLCONSOLE:
2678 if (get_user(lines, (s32 __user *)(p+4))) {
2679 ret = -EFAULT;
2680 } else {
2681 scrollfront(vc_cons[fg_console].d, lines);
2682 ret = 0;
2683 }
2684 break;
2685 case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
2686 acquire_console_sem();
2687 ignore_poke = 1;
2688 do_blank_screen(0);
2689 release_console_sem();
2690 break;
2691 case TIOCL_BLANKEDSCREEN:
2692 ret = console_blanked;
2693 break;
2694 default:
2695 ret = -EINVAL;
2696 break;
2697 }
2698 return ret;
2699 }
2700
2701 /*
2702 * /dev/ttyN handling
2703 */
2704
2705 static int con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2706 {
2707 int retval;
2708
2709 retval = do_con_write(tty, buf, count);
2710 con_flush_chars(tty);
2711
2712 return retval;
2713 }
2714
2715 static int con_put_char(struct tty_struct *tty, unsigned char ch)
2716 {
2717 if (in_interrupt())
2718 return 0; /* n_r3964 calls put_char() from interrupt context */
2719 return do_con_write(tty, &ch, 1);
2720 }
2721
2722 static int con_write_room(struct tty_struct *tty)
2723 {
2724 if (tty->stopped)
2725 return 0;
2726 return 32768; /* No limit, really; we're not buffering */
2727 }
2728
2729 static int con_chars_in_buffer(struct tty_struct *tty)
2730 {
2731 return 0; /* we're not buffering */
2732 }
2733
2734 /*
2735 * con_throttle and con_unthrottle are only used for
2736 * paste_selection(), which has to stuff in a large number of
2737 * characters...
2738 */
2739 static void con_throttle(struct tty_struct *tty)
2740 {
2741 }
2742
2743 static void con_unthrottle(struct tty_struct *tty)
2744 {
2745 struct vc_data *vc = tty->driver_data;
2746
2747 wake_up_interruptible(&vc->paste_wait);
2748 }
2749
2750 /*
2751 * Turn the Scroll-Lock LED on when the tty is stopped
2752 */
2753 static void con_stop(struct tty_struct *tty)
2754 {
2755 int console_num;
2756 if (!tty)
2757 return;
2758 console_num = tty->index;
2759 if (!vc_cons_allocated(console_num))
2760 return;
2761 set_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2762 set_leds();
2763 }
2764
2765 /*
2766 * Turn the Scroll-Lock LED off when the console is started
2767 */
2768 static void con_start(struct tty_struct *tty)
2769 {
2770 int console_num;
2771 if (!tty)
2772 return;
2773 console_num = tty->index;
2774 if (!vc_cons_allocated(console_num))
2775 return;
2776 clr_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2777 set_leds();
2778 }
2779
2780 static void con_flush_chars(struct tty_struct *tty)
2781 {
2782 struct vc_data *vc;
2783
2784 if (in_interrupt()) /* from flush_to_ldisc */
2785 return;
2786
2787 /* if we race with con_close(), vt may be null */
2788 acquire_console_sem();
2789 vc = tty->driver_data;
2790 if (vc)
2791 set_cursor(vc);
2792 release_console_sem();
2793 }
2794
2795 /*
2796 * Allocate the console screen memory.
2797 */
2798 static int con_open(struct tty_struct *tty, struct file *filp)
2799 {
2800 unsigned int currcons = tty->index;
2801 int ret = 0;
2802
2803 acquire_console_sem();
2804 if (tty->driver_data == NULL) {
2805 ret = vc_allocate(currcons);
2806 if (ret == 0) {
2807 struct vc_data *vc = vc_cons[currcons].d;
2808
2809 /* Still being freed */
2810 if (vc->port.tty) {
2811 release_console_sem();
2812 return -ERESTARTSYS;
2813 }
2814 tty->driver_data = vc;
2815 vc->port.tty = tty;
2816
2817 if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
2818 tty->winsize.ws_row = vc_cons[currcons].d->vc_rows;
2819 tty->winsize.ws_col = vc_cons[currcons].d->vc_cols;
2820 }
2821 if (vc->vc_utf)
2822 tty->termios->c_iflag |= IUTF8;
2823 else
2824 tty->termios->c_iflag &= ~IUTF8;
2825 release_console_sem();
2826 return ret;
2827 }
2828 }
2829 release_console_sem();
2830 return ret;
2831 }
2832
2833 static void con_close(struct tty_struct *tty, struct file *filp)
2834 {
2835 /* Nothing to do - we defer to shutdown */
2836 }
2837
2838 static void con_shutdown(struct tty_struct *tty)
2839 {
2840 struct vc_data *vc = tty->driver_data;
2841 BUG_ON(vc == NULL);
2842 acquire_console_sem();
2843 vc->port.tty = NULL;
2844 release_console_sem();
2845 tty_shutdown(tty);
2846 }
2847
2848 static int default_italic_color = 2; // green (ASCII)
2849 static int default_underline_color = 3; // cyan (ASCII)
2850 module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR);
2851 module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR);
2852
2853 static void vc_init(struct vc_data *vc, unsigned int rows,
2854 unsigned int cols, int do_clear)
2855 {
2856 int j, k ;
2857
2858 vc->vc_cols = cols;
2859 vc->vc_rows = rows;
2860 vc->vc_size_row = cols << 1;
2861 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
2862
2863 set_origin(vc);
2864 vc->vc_pos = vc->vc_origin;
2865 reset_vc(vc);
2866 for (j=k=0; j<16; j++) {
2867 vc->vc_palette[k++] = default_red[j] ;
2868 vc->vc_palette[k++] = default_grn[j] ;
2869 vc->vc_palette[k++] = default_blu[j] ;
2870 }
2871 vc->vc_def_color = 0x07; /* white */
2872 vc->vc_ulcolor = default_underline_color;
2873 vc->vc_itcolor = default_italic_color;
2874 vc->vc_halfcolor = 0x08; /* grey */
2875 init_waitqueue_head(&vc->paste_wait);
2876 reset_terminal(vc, do_clear);
2877 }
2878
2879 /*
2880 * This routine initializes console interrupts, and does nothing
2881 * else. If you want the screen to clear, call tty_write with
2882 * the appropriate escape-sequence.
2883 */
2884
2885 static int __init con_init(void)
2886 {
2887 const char *display_desc = NULL;
2888 struct vc_data *vc;
2889 unsigned int currcons = 0, i;
2890
2891 acquire_console_sem();
2892
2893 if (conswitchp)
2894 display_desc = conswitchp->con_startup();
2895 if (!display_desc) {
2896 fg_console = 0;
2897 release_console_sem();
2898 return 0;
2899 }
2900
2901 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2902 struct con_driver *con_driver = &registered_con_driver[i];
2903
2904 if (con_driver->con == NULL) {
2905 con_driver->con = conswitchp;
2906 con_driver->desc = display_desc;
2907 con_driver->flag = CON_DRIVER_FLAG_INIT;
2908 con_driver->first = 0;
2909 con_driver->last = MAX_NR_CONSOLES - 1;
2910 break;
2911 }
2912 }
2913
2914 for (i = 0; i < MAX_NR_CONSOLES; i++)
2915 con_driver_map[i] = conswitchp;
2916
2917 if (blankinterval) {
2918 blank_state = blank_normal_wait;
2919 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
2920 }
2921
2922 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) {
2923 vc_cons[currcons].d = vc = kzalloc(sizeof(struct vc_data), GFP_NOWAIT);
2924 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
2925 tty_port_init(&vc->port);
2926 visual_init(vc, currcons, 1);
2927 vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_NOWAIT);
2928 vc_init(vc, vc->vc_rows, vc->vc_cols,
2929 currcons || !vc->vc_sw->con_save_screen);
2930 }
2931 currcons = fg_console = 0;
2932 master_display_fg = vc = vc_cons[currcons].d;
2933 set_origin(vc);
2934 save_screen(vc);
2935 gotoxy(vc, vc->vc_x, vc->vc_y);
2936 csi_J(vc, 0);
2937 update_screen(vc);
2938 printk("Console: %s %s %dx%d",
2939 vc->vc_can_do_color ? "colour" : "mono",
2940 display_desc, vc->vc_cols, vc->vc_rows);
2941 printable = 1;
2942 printk("\n");
2943
2944 release_console_sem();
2945
2946 #ifdef CONFIG_VT_CONSOLE
2947 register_console(&vt_console_driver);
2948 #endif
2949 return 0;
2950 }
2951 console_initcall(con_init);
2952
2953 static const struct tty_operations con_ops = {
2954 .open = con_open,
2955 .close = con_close,
2956 .write = con_write,
2957 .write_room = con_write_room,
2958 .put_char = con_put_char,
2959 .flush_chars = con_flush_chars,
2960 .chars_in_buffer = con_chars_in_buffer,
2961 .ioctl = vt_ioctl,
2962 #ifdef CONFIG_COMPAT
2963 .compat_ioctl = vt_compat_ioctl,
2964 #endif
2965 .stop = con_stop,
2966 .start = con_start,
2967 .throttle = con_throttle,
2968 .unthrottle = con_unthrottle,
2969 .resize = vt_resize,
2970 .shutdown = con_shutdown
2971 };
2972
2973 static struct cdev vc0_cdev;
2974
2975 int __init vty_init(const struct file_operations *console_fops)
2976 {
2977 cdev_init(&vc0_cdev, console_fops);
2978 if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) ||
2979 register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0)
2980 panic("Couldn't register /dev/tty0 driver\n");
2981 device_create(tty_class, NULL, MKDEV(TTY_MAJOR, 0), NULL, "tty0");
2982
2983 vcs_init();
2984
2985 console_driver = alloc_tty_driver(MAX_NR_CONSOLES);
2986 if (!console_driver)
2987 panic("Couldn't allocate console driver\n");
2988 console_driver->owner = THIS_MODULE;
2989 console_driver->name = "tty";
2990 console_driver->name_base = 1;
2991 console_driver->major = TTY_MAJOR;
2992 console_driver->minor_start = 1;
2993 console_driver->type = TTY_DRIVER_TYPE_CONSOLE;
2994 console_driver->init_termios = tty_std_termios;
2995 if (default_utf8)
2996 console_driver->init_termios.c_iflag |= IUTF8;
2997 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS;
2998 tty_set_operations(console_driver, &con_ops);
2999 if (tty_register_driver(console_driver))
3000 panic("Couldn't register console driver\n");
3001 kbd_init();
3002 console_map_init();
3003 #ifdef CONFIG_MDA_CONSOLE
3004 mda_console_init();
3005 #endif
3006 return 0;
3007 }
3008
3009 #ifndef VT_SINGLE_DRIVER
3010
3011 static struct class *vtconsole_class;
3012
3013 static int bind_con_driver(const struct consw *csw, int first, int last,
3014 int deflt)
3015 {
3016 struct module *owner = csw->owner;
3017 const char *desc = NULL;
3018 struct con_driver *con_driver;
3019 int i, j = -1, k = -1, retval = -ENODEV;
3020
3021 if (!try_module_get(owner))
3022 return -ENODEV;
3023
3024 acquire_console_sem();
3025
3026 /* check if driver is registered */
3027 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3028 con_driver = &registered_con_driver[i];
3029
3030 if (con_driver->con == csw) {
3031 desc = con_driver->desc;
3032 retval = 0;
3033 break;
3034 }
3035 }
3036
3037 if (retval)
3038 goto err;
3039
3040 if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) {
3041 csw->con_startup();
3042 con_driver->flag |= CON_DRIVER_FLAG_INIT;
3043 }
3044
3045 if (deflt) {
3046 if (conswitchp)
3047 module_put(conswitchp->owner);
3048
3049 __module_get(owner);
3050 conswitchp = csw;
3051 }
3052
3053 first = max(first, con_driver->first);
3054 last = min(last, con_driver->last);
3055
3056 for (i = first; i <= last; i++) {
3057 int old_was_color;
3058 struct vc_data *vc = vc_cons[i].d;
3059
3060 if (con_driver_map[i])
3061 module_put(con_driver_map[i]->owner);
3062 __module_get(owner);
3063 con_driver_map[i] = csw;
3064
3065 if (!vc || !vc->vc_sw)
3066 continue;
3067
3068 j = i;
3069
3070 if (CON_IS_VISIBLE(vc)) {
3071 k = i;
3072 save_screen(vc);
3073 }
3074
3075 old_was_color = vc->vc_can_do_color;
3076 vc->vc_sw->con_deinit(vc);
3077 if (!vc->vc_origin)
3078 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
3079 visual_init(vc, i, 0);
3080 set_origin(vc);
3081 update_attr(vc);
3082
3083 /* If the console changed between mono <-> color, then
3084 * the attributes in the screenbuf will be wrong. The
3085 * following resets all attributes to something sane.
3086 */
3087 if (old_was_color != vc->vc_can_do_color)
3088 clear_buffer_attributes(vc);
3089 }
3090
3091 printk("Console: switching ");
3092 if (!deflt)
3093 printk("consoles %d-%d ", first+1, last+1);
3094 if (j >= 0) {
3095 struct vc_data *vc = vc_cons[j].d;
3096
3097 printk("to %s %s %dx%d\n",
3098 vc->vc_can_do_color ? "colour" : "mono",
3099 desc, vc->vc_cols, vc->vc_rows);
3100
3101 if (k >= 0) {
3102 vc = vc_cons[k].d;
3103 update_screen(vc);
3104 }
3105 } else
3106 printk("to %s\n", desc);
3107
3108 retval = 0;
3109 err:
3110 release_console_sem();
3111 module_put(owner);
3112 return retval;
3113 };
3114
3115 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
3116 static int con_is_graphics(const struct consw *csw, int first, int last)
3117 {
3118 int i, retval = 0;
3119
3120 for (i = first; i <= last; i++) {
3121 struct vc_data *vc = vc_cons[i].d;
3122
3123 if (vc && vc->vc_mode == KD_GRAPHICS) {
3124 retval = 1;
3125 break;
3126 }
3127 }
3128
3129 return retval;
3130 }
3131
3132 /**
3133 * unbind_con_driver - unbind a console driver
3134 * @csw: pointer to console driver to unregister
3135 * @first: first in range of consoles that @csw should be unbound from
3136 * @last: last in range of consoles that @csw should be unbound from
3137 * @deflt: should next bound console driver be default after @csw is unbound?
3138 *
3139 * To unbind a driver from all possible consoles, pass 0 as @first and
3140 * %MAX_NR_CONSOLES as @last.
3141 *
3142 * @deflt controls whether the console that ends up replacing @csw should be
3143 * the default console.
3144 *
3145 * RETURNS:
3146 * -ENODEV if @csw isn't a registered console driver or can't be unregistered
3147 * or 0 on success.
3148 */
3149 int unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
3150 {
3151 struct module *owner = csw->owner;
3152 const struct consw *defcsw = NULL;
3153 struct con_driver *con_driver = NULL, *con_back = NULL;
3154 int i, retval = -ENODEV;
3155
3156 if (!try_module_get(owner))
3157 return -ENODEV;
3158
3159 acquire_console_sem();
3160
3161 /* check if driver is registered and if it is unbindable */
3162 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3163 con_driver = &registered_con_driver[i];
3164
3165 if (con_driver->con == csw &&
3166 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3167 retval = 0;
3168 break;
3169 }
3170 }
3171
3172 if (retval) {
3173 release_console_sem();
3174 goto err;
3175 }
3176
3177 retval = -ENODEV;
3178
3179 /* check if backup driver exists */
3180 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3181 con_back = &registered_con_driver[i];
3182
3183 if (con_back->con &&
3184 !(con_back->flag & CON_DRIVER_FLAG_MODULE)) {
3185 defcsw = con_back->con;
3186 retval = 0;
3187 break;
3188 }
3189 }
3190
3191 if (retval) {
3192 release_console_sem();
3193 goto err;
3194 }
3195
3196 if (!con_is_bound(csw)) {
3197 release_console_sem();
3198 goto err;
3199 }
3200
3201 first = max(first, con_driver->first);
3202 last = min(last, con_driver->last);
3203
3204 for (i = first; i <= last; i++) {
3205 if (con_driver_map[i] == csw) {
3206 module_put(csw->owner);
3207 con_driver_map[i] = NULL;
3208 }
3209 }
3210
3211 if (!con_is_bound(defcsw)) {
3212 const struct consw *defconsw = conswitchp;
3213
3214 defcsw->con_startup();
3215 con_back->flag |= CON_DRIVER_FLAG_INIT;
3216 /*
3217 * vgacon may change the default driver to point
3218 * to dummycon, we restore it here...
3219 */
3220 conswitchp = defconsw;
3221 }
3222
3223 if (!con_is_bound(csw))
3224 con_driver->flag &= ~CON_DRIVER_FLAG_INIT;
3225
3226 release_console_sem();
3227 /* ignore return value, binding should not fail */
3228 bind_con_driver(defcsw, first, last, deflt);
3229 err:
3230 module_put(owner);
3231 return retval;
3232
3233 }
3234 EXPORT_SYMBOL(unbind_con_driver);
3235
3236 static int vt_bind(struct con_driver *con)
3237 {
3238 const struct consw *defcsw = NULL, *csw = NULL;
3239 int i, more = 1, first = -1, last = -1, deflt = 0;
3240
3241 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3242 con_is_graphics(con->con, con->first, con->last))
3243 goto err;
3244
3245 csw = con->con;
3246
3247 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3248 struct con_driver *con = &registered_con_driver[i];
3249
3250 if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) {
3251 defcsw = con->con;
3252 break;
3253 }
3254 }
3255
3256 if (!defcsw)
3257 goto err;
3258
3259 while (more) {
3260 more = 0;
3261
3262 for (i = con->first; i <= con->last; i++) {
3263 if (con_driver_map[i] == defcsw) {
3264 if (first == -1)
3265 first = i;
3266 last = i;
3267 more = 1;
3268 } else if (first != -1)
3269 break;
3270 }
3271
3272 if (first == 0 && last == MAX_NR_CONSOLES -1)
3273 deflt = 1;
3274
3275 if (first != -1)
3276 bind_con_driver(csw, first, last, deflt);
3277
3278 first = -1;
3279 last = -1;
3280 deflt = 0;
3281 }
3282
3283 err:
3284 return 0;
3285 }
3286
3287 static int vt_unbind(struct con_driver *con)
3288 {
3289 const struct consw *csw = NULL;
3290 int i, more = 1, first = -1, last = -1, deflt = 0;
3291
3292 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3293 con_is_graphics(con->con, con->first, con->last))
3294 goto err;
3295
3296 csw = con->con;
3297
3298 while (more) {
3299 more = 0;
3300
3301 for (i = con->first; i <= con->last; i++) {
3302 if (con_driver_map[i] == csw) {
3303 if (first == -1)
3304 first = i;
3305 last = i;
3306 more = 1;
3307 } else if (first != -1)
3308 break;
3309 }
3310
3311 if (first == 0 && last == MAX_NR_CONSOLES -1)
3312 deflt = 1;
3313
3314 if (first != -1)
3315 unbind_con_driver(csw, first, last, deflt);
3316
3317 first = -1;
3318 last = -1;
3319 deflt = 0;
3320 }
3321
3322 err:
3323 return 0;
3324 }
3325 #else
3326 static inline int vt_bind(struct con_driver *con)
3327 {
3328 return 0;
3329 }
3330 static inline int vt_unbind(struct con_driver *con)
3331 {
3332 return 0;
3333 }
3334 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3335
3336 static ssize_t store_bind(struct device *dev, struct device_attribute *attr,
3337 const char *buf, size_t count)
3338 {
3339 struct con_driver *con = dev_get_drvdata(dev);
3340 int bind = simple_strtoul(buf, NULL, 0);
3341
3342 if (bind)
3343 vt_bind(con);
3344 else
3345 vt_unbind(con);
3346
3347 return count;
3348 }
3349
3350 static ssize_t show_bind(struct device *dev, struct device_attribute *attr,
3351 char *buf)
3352 {
3353 struct con_driver *con = dev_get_drvdata(dev);
3354 int bind = con_is_bound(con->con);
3355
3356 return snprintf(buf, PAGE_SIZE, "%i\n", bind);
3357 }
3358
3359 static ssize_t show_name(struct device *dev, struct device_attribute *attr,
3360 char *buf)
3361 {
3362 struct con_driver *con = dev_get_drvdata(dev);
3363
3364 return snprintf(buf, PAGE_SIZE, "%s %s\n",
3365 (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)",
3366 con->desc);
3367
3368 }
3369
3370 static struct device_attribute device_attrs[] = {
3371 __ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind),
3372 __ATTR(name, S_IRUGO, show_name, NULL),
3373 };
3374
3375 static int vtconsole_init_device(struct con_driver *con)
3376 {
3377 int i;
3378 int error = 0;
3379
3380 con->flag |= CON_DRIVER_FLAG_ATTR;
3381 dev_set_drvdata(con->dev, con);
3382 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3383 error = device_create_file(con->dev, &device_attrs[i]);
3384 if (error)
3385 break;
3386 }
3387
3388 if (error) {
3389 while (--i >= 0)
3390 device_remove_file(con->dev, &device_attrs[i]);
3391 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3392 }
3393
3394 return error;
3395 }
3396
3397 static void vtconsole_deinit_device(struct con_driver *con)
3398 {
3399 int i;
3400
3401 if (con->flag & CON_DRIVER_FLAG_ATTR) {
3402 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3403 device_remove_file(con->dev, &device_attrs[i]);
3404 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3405 }
3406 }
3407
3408 /**
3409 * con_is_bound - checks if driver is bound to the console
3410 * @csw: console driver
3411 *
3412 * RETURNS: zero if unbound, nonzero if bound
3413 *
3414 * Drivers can call this and if zero, they should release
3415 * all resources allocated on con_startup()
3416 */
3417 int con_is_bound(const struct consw *csw)
3418 {
3419 int i, bound = 0;
3420
3421 for (i = 0; i < MAX_NR_CONSOLES; i++) {
3422 if (con_driver_map[i] == csw) {
3423 bound = 1;
3424 break;
3425 }
3426 }
3427
3428 return bound;
3429 }
3430 EXPORT_SYMBOL(con_is_bound);
3431
3432 /**
3433 * con_debug_enter - prepare the console for the kernel debugger
3434 * @sw: console driver
3435 *
3436 * Called when the console is taken over by the kernel debugger, this
3437 * function needs to save the current console state, then put the console
3438 * into a state suitable for the kernel debugger.
3439 *
3440 * RETURNS:
3441 * Zero on success, nonzero if a failure occurred when trying to prepare
3442 * the console for the debugger.
3443 */
3444 int con_debug_enter(struct vc_data *vc)
3445 {
3446 int ret = 0;
3447
3448 saved_fg_console = fg_console;
3449 saved_last_console = last_console;
3450 saved_want_console = want_console;
3451 saved_vc_mode = vc->vc_mode;
3452 vc->vc_mode = KD_TEXT;
3453 console_blanked = 0;
3454 if (vc->vc_sw->con_debug_enter)
3455 ret = vc->vc_sw->con_debug_enter(vc);
3456 #ifdef CONFIG_KGDB_KDB
3457 /* Set the initial LINES variable if it is not already set */
3458 if (vc->vc_rows < 999) {
3459 int linecount;
3460 char lns[4];
3461 const char *setargs[3] = {
3462 "set",
3463 "LINES",
3464 lns,
3465 };
3466 if (kdbgetintenv(setargs[0], &linecount)) {
3467 snprintf(lns, 4, "%i", vc->vc_rows);
3468 kdb_set(2, setargs);
3469 }
3470 }
3471 #endif /* CONFIG_KGDB_KDB */
3472 return ret;
3473 }
3474 EXPORT_SYMBOL_GPL(con_debug_enter);
3475
3476 /**
3477 * con_debug_leave - restore console state
3478 * @sw: console driver
3479 *
3480 * Restore the console state to what it was before the kernel debugger
3481 * was invoked.
3482 *
3483 * RETURNS:
3484 * Zero on success, nonzero if a failure occurred when trying to restore
3485 * the console.
3486 */
3487 int con_debug_leave(void)
3488 {
3489 struct vc_data *vc;
3490 int ret = 0;
3491
3492 fg_console = saved_fg_console;
3493 last_console = saved_last_console;
3494 want_console = saved_want_console;
3495 vc_cons[fg_console].d->vc_mode = saved_vc_mode;
3496
3497 vc = vc_cons[fg_console].d;
3498 if (vc->vc_sw->con_debug_leave)
3499 ret = vc->vc_sw->con_debug_leave(vc);
3500 return ret;
3501 }
3502 EXPORT_SYMBOL_GPL(con_debug_leave);
3503
3504 /**
3505 * register_con_driver - register console driver to console layer
3506 * @csw: console driver
3507 * @first: the first console to take over, minimum value is 0
3508 * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1
3509 *
3510 * DESCRIPTION: This function registers a console driver which can later
3511 * bind to a range of consoles specified by @first and @last. It will
3512 * also initialize the console driver by calling con_startup().
3513 */
3514 int register_con_driver(const struct consw *csw, int first, int last)
3515 {
3516 struct module *owner = csw->owner;
3517 struct con_driver *con_driver;
3518 const char *desc;
3519 int i, retval = 0;
3520
3521 if (!try_module_get(owner))
3522 return -ENODEV;
3523
3524 acquire_console_sem();
3525
3526 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3527 con_driver = &registered_con_driver[i];
3528
3529 /* already registered */
3530 if (con_driver->con == csw)
3531 retval = -EINVAL;
3532 }
3533
3534 if (retval)
3535 goto err;
3536
3537 desc = csw->con_startup();
3538
3539 if (!desc)
3540 goto err;
3541
3542 retval = -EINVAL;
3543
3544 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3545 con_driver = &registered_con_driver[i];
3546
3547 if (con_driver->con == NULL) {
3548 con_driver->con = csw;
3549 con_driver->desc = desc;
3550 con_driver->node = i;
3551 con_driver->flag = CON_DRIVER_FLAG_MODULE |
3552 CON_DRIVER_FLAG_INIT;
3553 con_driver->first = first;
3554 con_driver->last = last;
3555 retval = 0;
3556 break;
3557 }
3558 }
3559
3560 if (retval)
3561 goto err;
3562
3563 con_driver->dev = device_create(vtconsole_class, NULL,
3564 MKDEV(0, con_driver->node),
3565 NULL, "vtcon%i",
3566 con_driver->node);
3567
3568 if (IS_ERR(con_driver->dev)) {
3569 printk(KERN_WARNING "Unable to create device for %s; "
3570 "errno = %ld\n", con_driver->desc,
3571 PTR_ERR(con_driver->dev));
3572 con_driver->dev = NULL;
3573 } else {
3574 vtconsole_init_device(con_driver);
3575 }
3576
3577 err:
3578 release_console_sem();
3579 module_put(owner);
3580 return retval;
3581 }
3582 EXPORT_SYMBOL(register_con_driver);
3583
3584 /**
3585 * unregister_con_driver - unregister console driver from console layer
3586 * @csw: console driver
3587 *
3588 * DESCRIPTION: All drivers that registers to the console layer must
3589 * call this function upon exit, or if the console driver is in a state
3590 * where it won't be able to handle console services, such as the
3591 * framebuffer console without loaded framebuffer drivers.
3592 *
3593 * The driver must unbind first prior to unregistration.
3594 */
3595 int unregister_con_driver(const struct consw *csw)
3596 {
3597 int i, retval = -ENODEV;
3598
3599 acquire_console_sem();
3600
3601 /* cannot unregister a bound driver */
3602 if (con_is_bound(csw))
3603 goto err;
3604
3605 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3606 struct con_driver *con_driver = &registered_con_driver[i];
3607
3608 if (con_driver->con == csw &&
3609 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3610 vtconsole_deinit_device(con_driver);
3611 device_destroy(vtconsole_class,
3612 MKDEV(0, con_driver->node));
3613 con_driver->con = NULL;
3614 con_driver->desc = NULL;
3615 con_driver->dev = NULL;
3616 con_driver->node = 0;
3617 con_driver->flag = 0;
3618 con_driver->first = 0;
3619 con_driver->last = 0;
3620 retval = 0;
3621 break;
3622 }
3623 }
3624 err:
3625 release_console_sem();
3626 return retval;
3627 }
3628 EXPORT_SYMBOL(unregister_con_driver);
3629
3630 /*
3631 * If we support more console drivers, this function is used
3632 * when a driver wants to take over some existing consoles
3633 * and become default driver for newly opened ones.
3634 *
3635 * take_over_console is basically a register followed by unbind
3636 */
3637 int take_over_console(const struct consw *csw, int first, int last, int deflt)
3638 {
3639 int err;
3640
3641 err = register_con_driver(csw, first, last);
3642
3643 if (!err)
3644 bind_con_driver(csw, first, last, deflt);
3645
3646 return err;
3647 }
3648
3649 /*
3650 * give_up_console is a wrapper to unregister_con_driver. It will only
3651 * work if driver is fully unbound.
3652 */
3653 void give_up_console(const struct consw *csw)
3654 {
3655 unregister_con_driver(csw);
3656 }
3657
3658 static int __init vtconsole_class_init(void)
3659 {
3660 int i;
3661
3662 vtconsole_class = class_create(THIS_MODULE, "vtconsole");
3663 if (IS_ERR(vtconsole_class)) {
3664 printk(KERN_WARNING "Unable to create vt console class; "
3665 "errno = %ld\n", PTR_ERR(vtconsole_class));
3666 vtconsole_class = NULL;
3667 }
3668
3669 /* Add system drivers to sysfs */
3670 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3671 struct con_driver *con = &registered_con_driver[i];
3672
3673 if (con->con && !con->dev) {
3674 con->dev = device_create(vtconsole_class, NULL,
3675 MKDEV(0, con->node),
3676 NULL, "vtcon%i",
3677 con->node);
3678
3679 if (IS_ERR(con->dev)) {
3680 printk(KERN_WARNING "Unable to create "
3681 "device for %s; errno = %ld\n",
3682 con->desc, PTR_ERR(con->dev));
3683 con->dev = NULL;
3684 } else {
3685 vtconsole_init_device(con);
3686 }
3687 }
3688 }
3689
3690 return 0;
3691 }
3692 postcore_initcall(vtconsole_class_init);
3693
3694 #endif
3695
3696 /*
3697 * Screen blanking
3698 */
3699
3700 static int set_vesa_blanking(char __user *p)
3701 {
3702 unsigned int mode;
3703
3704 if (get_user(mode, p + 1))
3705 return -EFAULT;
3706
3707 vesa_blank_mode = (mode < 4) ? mode : 0;
3708 return 0;
3709 }
3710
3711 void do_blank_screen(int entering_gfx)
3712 {
3713 struct vc_data *vc = vc_cons[fg_console].d;
3714 int i;
3715
3716 WARN_CONSOLE_UNLOCKED();
3717
3718 if (console_blanked) {
3719 if (blank_state == blank_vesa_wait) {
3720 blank_state = blank_off;
3721 vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0);
3722 }
3723 return;
3724 }
3725
3726 /* entering graphics mode? */
3727 if (entering_gfx) {
3728 hide_cursor(vc);
3729 save_screen(vc);
3730 vc->vc_sw->con_blank(vc, -1, 1);
3731 console_blanked = fg_console + 1;
3732 blank_state = blank_off;
3733 set_origin(vc);
3734 return;
3735 }
3736
3737 if (blank_state != blank_normal_wait)
3738 return;
3739 blank_state = blank_off;
3740
3741 /* don't blank graphics */
3742 if (vc->vc_mode != KD_TEXT) {
3743 console_blanked = fg_console + 1;
3744 return;
3745 }
3746
3747 hide_cursor(vc);
3748 del_timer_sync(&console_timer);
3749 blank_timer_expired = 0;
3750
3751 save_screen(vc);
3752 /* In case we need to reset origin, blanking hook returns 1 */
3753 i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0);
3754 console_blanked = fg_console + 1;
3755 if (i)
3756 set_origin(vc);
3757
3758 if (console_blank_hook && console_blank_hook(1))
3759 return;
3760
3761 if (vesa_off_interval && vesa_blank_mode) {
3762 blank_state = blank_vesa_wait;
3763 mod_timer(&console_timer, jiffies + vesa_off_interval);
3764 }
3765 vt_event_post(VT_EVENT_BLANK, vc->vc_num, vc->vc_num);
3766 }
3767 EXPORT_SYMBOL(do_blank_screen);
3768
3769 /*
3770 * Called by timer as well as from vt_console_driver
3771 */
3772 void do_unblank_screen(int leaving_gfx)
3773 {
3774 struct vc_data *vc;
3775
3776 /* This should now always be called from a "sane" (read: can schedule)
3777 * context for the sake of the low level drivers, except in the special
3778 * case of oops_in_progress
3779 */
3780 if (!oops_in_progress)
3781 might_sleep();
3782
3783 WARN_CONSOLE_UNLOCKED();
3784
3785 ignore_poke = 0;
3786 if (!console_blanked)
3787 return;
3788 if (!vc_cons_allocated(fg_console)) {
3789 /* impossible */
3790 printk("unblank_screen: tty %d not allocated ??\n", fg_console+1);
3791 return;
3792 }
3793 vc = vc_cons[fg_console].d;
3794 /* Try to unblank in oops case too */
3795 if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc))
3796 return; /* but leave console_blanked != 0 */
3797
3798 if (blankinterval) {
3799 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
3800 blank_state = blank_normal_wait;
3801 }
3802
3803 console_blanked = 0;
3804 if (vc->vc_sw->con_blank(vc, 0, leaving_gfx) || vt_force_oops_output(vc))
3805 /* Low-level driver cannot restore -> do it ourselves */
3806 update_screen(vc);
3807 if (console_blank_hook)
3808 console_blank_hook(0);
3809 set_palette(vc);
3810 set_cursor(vc);
3811 vt_event_post(VT_EVENT_UNBLANK, vc->vc_num, vc->vc_num);
3812 }
3813 EXPORT_SYMBOL(do_unblank_screen);
3814
3815 /*
3816 * This is called by the outside world to cause a forced unblank, mostly for
3817 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
3818 * call it with 1 as an argument and so force a mode restore... that may kill
3819 * X or at least garbage the screen but would also make the Oops visible...
3820 */
3821 void unblank_screen(void)
3822 {
3823 do_unblank_screen(0);
3824 }
3825
3826 /*
3827 * We defer the timer blanking to work queue so it can take the console mutex
3828 * (console operations can still happen at irq time, but only from printk which
3829 * has the console mutex. Not perfect yet, but better than no locking
3830 */
3831 static void blank_screen_t(unsigned long dummy)
3832 {
3833 if (unlikely(!keventd_up())) {
3834 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
3835 return;
3836 }
3837 blank_timer_expired = 1;
3838 schedule_work(&console_work);
3839 }
3840
3841 void poke_blanked_console(void)
3842 {
3843 WARN_CONSOLE_UNLOCKED();
3844
3845 /* Add this so we quickly catch whoever might call us in a non
3846 * safe context. Nowadays, unblank_screen() isn't to be called in
3847 * atomic contexts and is allowed to schedule (with the special case
3848 * of oops_in_progress, but that isn't of any concern for this
3849 * function. --BenH.
3850 */
3851 might_sleep();
3852
3853 /* This isn't perfectly race free, but a race here would be mostly harmless,
3854 * at worse, we'll do a spurrious blank and it's unlikely
3855 */
3856 del_timer(&console_timer);
3857 blank_timer_expired = 0;
3858
3859 if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS)
3860 return;
3861 if (console_blanked)
3862 unblank_screen();
3863 else if (blankinterval) {
3864 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
3865 blank_state = blank_normal_wait;
3866 }
3867 }
3868
3869 /*
3870 * Palettes
3871 */
3872
3873 static void set_palette(struct vc_data *vc)
3874 {
3875 WARN_CONSOLE_UNLOCKED();
3876
3877 if (vc->vc_mode != KD_GRAPHICS)
3878 vc->vc_sw->con_set_palette(vc, color_table);
3879 }
3880
3881 static int set_get_cmap(unsigned char __user *arg, int set)
3882 {
3883 int i, j, k;
3884
3885 WARN_CONSOLE_UNLOCKED();
3886
3887 for (i = 0; i < 16; i++)
3888 if (set) {
3889 get_user(default_red[i], arg++);
3890 get_user(default_grn[i], arg++);
3891 get_user(default_blu[i], arg++);
3892 } else {
3893 put_user(default_red[i], arg++);
3894 put_user(default_grn[i], arg++);
3895 put_user(default_blu[i], arg++);
3896 }
3897 if (set) {
3898 for (i = 0; i < MAX_NR_CONSOLES; i++)
3899 if (vc_cons_allocated(i)) {
3900 for (j = k = 0; j < 16; j++) {
3901 vc_cons[i].d->vc_palette[k++] = default_red[j];
3902 vc_cons[i].d->vc_palette[k++] = default_grn[j];
3903 vc_cons[i].d->vc_palette[k++] = default_blu[j];
3904 }
3905 set_palette(vc_cons[i].d);
3906 }
3907 }
3908 return 0;
3909 }
3910
3911 /*
3912 * Load palette into the DAC registers. arg points to a colour
3913 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
3914 */
3915
3916 int con_set_cmap(unsigned char __user *arg)
3917 {
3918 int rc;
3919
3920 acquire_console_sem();
3921 rc = set_get_cmap (arg,1);
3922 release_console_sem();
3923
3924 return rc;
3925 }
3926
3927 int con_get_cmap(unsigned char __user *arg)
3928 {
3929 int rc;
3930
3931 acquire_console_sem();
3932 rc = set_get_cmap (arg,0);
3933 release_console_sem();
3934
3935 return rc;
3936 }
3937
3938 void reset_palette(struct vc_data *vc)
3939 {
3940 int j, k;
3941 for (j=k=0; j<16; j++) {
3942 vc->vc_palette[k++] = default_red[j];
3943 vc->vc_palette[k++] = default_grn[j];
3944 vc->vc_palette[k++] = default_blu[j];
3945 }
3946 set_palette(vc);
3947 }
3948
3949 /*
3950 * Font switching
3951 *
3952 * Currently we only support fonts up to 32 pixels wide, at a maximum height
3953 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
3954 * depending on width) reserved for each character which is kinda wasty, but
3955 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
3956 * is upto the actual low-level console-driver convert data into its favorite
3957 * format (maybe we should add a `fontoffset' field to the `display'
3958 * structure so we won't have to convert the fontdata all the time.
3959 * /Jes
3960 */
3961
3962 #define max_font_size 65536
3963
3964 static int con_font_get(struct vc_data *vc, struct console_font_op *op)
3965 {
3966 struct console_font font;
3967 int rc = -EINVAL;
3968 int c;
3969
3970 if (vc->vc_mode != KD_TEXT)
3971 return -EINVAL;
3972
3973 if (op->data) {
3974 font.data = kmalloc(max_font_size, GFP_KERNEL);
3975 if (!font.data)
3976 return -ENOMEM;
3977 } else
3978 font.data = NULL;
3979
3980 acquire_console_sem();
3981 if (vc->vc_sw->con_font_get)
3982 rc = vc->vc_sw->con_font_get(vc, &font);
3983 else
3984 rc = -ENOSYS;
3985 release_console_sem();
3986
3987 if (rc)
3988 goto out;
3989
3990 c = (font.width+7)/8 * 32 * font.charcount;
3991
3992 if (op->data && font.charcount > op->charcount)
3993 rc = -ENOSPC;
3994 if (!(op->flags & KD_FONT_FLAG_OLD)) {
3995 if (font.width > op->width || font.height > op->height)
3996 rc = -ENOSPC;
3997 } else {
3998 if (font.width != 8)
3999 rc = -EIO;
4000 else if ((op->height && font.height > op->height) ||
4001 font.height > 32)
4002 rc = -ENOSPC;
4003 }
4004 if (rc)
4005 goto out;
4006
4007 op->height = font.height;
4008 op->width = font.width;
4009 op->charcount = font.charcount;
4010
4011 if (op->data && copy_to_user(op->data, font.data, c))
4012 rc = -EFAULT;
4013
4014 out:
4015 kfree(font.data);
4016 return rc;
4017 }
4018
4019 static int con_font_set(struct vc_data *vc, struct console_font_op *op)
4020 {
4021 struct console_font font;
4022 int rc = -EINVAL;
4023 int size;
4024
4025 if (vc->vc_mode != KD_TEXT)
4026 return -EINVAL;
4027 if (!op->data)
4028 return -EINVAL;
4029 if (op->charcount > 512)
4030 return -EINVAL;
4031 if (!op->height) { /* Need to guess font height [compat] */
4032 int h, i;
4033 u8 __user *charmap = op->data;
4034 u8 tmp;
4035
4036 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
4037 so that we can get rid of this soon */
4038 if (!(op->flags & KD_FONT_FLAG_OLD))
4039 return -EINVAL;
4040 for (h = 32; h > 0; h--)
4041 for (i = 0; i < op->charcount; i++) {
4042 if (get_user(tmp, &charmap[32*i+h-1]))
4043 return -EFAULT;
4044 if (tmp)
4045 goto nonzero;
4046 }
4047 return -EINVAL;
4048 nonzero:
4049 op->height = h;
4050 }
4051 if (op->width <= 0 || op->width > 32 || op->height > 32)
4052 return -EINVAL;
4053 size = (op->width+7)/8 * 32 * op->charcount;
4054 if (size > max_font_size)
4055 return -ENOSPC;
4056 font.charcount = op->charcount;
4057 font.height = op->height;
4058 font.width = op->width;
4059 font.data = memdup_user(op->data, size);
4060 if (IS_ERR(font.data))
4061 return PTR_ERR(font.data);
4062 acquire_console_sem();
4063 if (vc->vc_sw->con_font_set)
4064 rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
4065 else
4066 rc = -ENOSYS;
4067 release_console_sem();
4068 kfree(font.data);
4069 return rc;
4070 }
4071
4072 static int con_font_default(struct vc_data *vc, struct console_font_op *op)
4073 {
4074 struct console_font font = {.width = op->width, .height = op->height};
4075 char name[MAX_FONT_NAME];
4076 char *s = name;
4077 int rc;
4078
4079 if (vc->vc_mode != KD_TEXT)
4080 return -EINVAL;
4081
4082 if (!op->data)
4083 s = NULL;
4084 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0)
4085 return -EFAULT;
4086 else
4087 name[MAX_FONT_NAME - 1] = 0;
4088
4089 acquire_console_sem();
4090 if (vc->vc_sw->con_font_default)
4091 rc = vc->vc_sw->con_font_default(vc, &font, s);
4092 else
4093 rc = -ENOSYS;
4094 release_console_sem();
4095 if (!rc) {
4096 op->width = font.width;
4097 op->height = font.height;
4098 }
4099 return rc;
4100 }
4101
4102 static int con_font_copy(struct vc_data *vc, struct console_font_op *op)
4103 {
4104 int con = op->height;
4105 int rc;
4106
4107 if (vc->vc_mode != KD_TEXT)
4108 return -EINVAL;
4109
4110 acquire_console_sem();
4111 if (!vc->vc_sw->con_font_copy)
4112 rc = -ENOSYS;
4113 else if (con < 0 || !vc_cons_allocated(con))
4114 rc = -ENOTTY;
4115 else if (con == vc->vc_num) /* nothing to do */
4116 rc = 0;
4117 else
4118 rc = vc->vc_sw->con_font_copy(vc, con);
4119 release_console_sem();
4120 return rc;
4121 }
4122
4123 int con_font_op(struct vc_data *vc, struct console_font_op *op)
4124 {
4125 switch (op->op) {
4126 case KD_FONT_OP_SET:
4127 return con_font_set(vc, op);
4128 case KD_FONT_OP_GET:
4129 return con_font_get(vc, op);
4130 case KD_FONT_OP_SET_DEFAULT:
4131 return con_font_default(vc, op);
4132 case KD_FONT_OP_COPY:
4133 return con_font_copy(vc, op);
4134 }
4135 return -ENOSYS;
4136 }
4137
4138 /*
4139 * Interface exported to selection and vcs.
4140 */
4141
4142 /* used by selection */
4143 u16 screen_glyph(struct vc_data *vc, int offset)
4144 {
4145 u16 w = scr_readw(screenpos(vc, offset, 1));
4146 u16 c = w & 0xff;
4147
4148 if (w & vc->vc_hi_font_mask)
4149 c |= 0x100;
4150 return c;
4151 }
4152 EXPORT_SYMBOL_GPL(screen_glyph);
4153
4154 /* used by vcs - note the word offset */
4155 unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed)
4156 {
4157 return screenpos(vc, 2 * w_offset, viewed);
4158 }
4159
4160 void getconsxy(struct vc_data *vc, unsigned char *p)
4161 {
4162 p[0] = vc->vc_x;
4163 p[1] = vc->vc_y;
4164 }
4165
4166 void putconsxy(struct vc_data *vc, unsigned char *p)
4167 {
4168 hide_cursor(vc);
4169 gotoxy(vc, p[0], p[1]);
4170 set_cursor(vc);
4171 }
4172
4173 u16 vcs_scr_readw(struct vc_data *vc, const u16 *org)
4174 {
4175 if ((unsigned long)org == vc->vc_pos && softcursor_original != -1)
4176 return softcursor_original;
4177 return scr_readw(org);
4178 }
4179
4180 void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org)
4181 {
4182 scr_writew(val, org);
4183 if ((unsigned long)org == vc->vc_pos) {
4184 softcursor_original = -1;
4185 add_softcursor(vc);
4186 }
4187 }
4188
4189 /*
4190 * Visible symbols for modules
4191 */
4192
4193 EXPORT_SYMBOL(color_table);
4194 EXPORT_SYMBOL(default_red);
4195 EXPORT_SYMBOL(default_grn);
4196 EXPORT_SYMBOL(default_blu);
4197 EXPORT_SYMBOL(update_region);
4198 EXPORT_SYMBOL(redraw_screen);
4199 EXPORT_SYMBOL(vc_resize);
4200 EXPORT_SYMBOL(fg_console);
4201 EXPORT_SYMBOL(console_blank_hook);
4202 EXPORT_SYMBOL(console_blanked);
4203 EXPORT_SYMBOL(vc_cons);
4204 EXPORT_SYMBOL(global_cursor_default);
4205 #ifndef VT_SINGLE_DRIVER
4206 EXPORT_SYMBOL(take_over_console);
4207 EXPORT_SYMBOL(give_up_console);
4208 #endif
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree