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[net-next-2.6.git] / drivers / char / vt.c
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1da177e4
LT		 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 <andrewm@uow.edu.au>
63 *
64 * Removed console_lock, enabled interrupts across all console operations
65 * 13 March 2001, Andrew Morton
d4328b40
AT		 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
1da177e4
LT		 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>
c831c338 89#include <linux/mutex.h>
1da177e4
LT		 90#include <linux/vt_kern.h>
91#include <linux/selection.h>
92#include <linux/tiocl.h>
93#include <linux/kbd_kern.h>
94#include <linux/consolemap.h>
95#include <linux/timer.h>
96#include <linux/interrupt.h>
1da177e4
LT		 97#include <linux/workqueue.h>
98#include <linux/bootmem.h>
99#include <linux/pm.h>
100#include <linux/font.h>
101#include <linux/bitops.h>
b293d758 102#include <linux/notifier.h>
1da177e4
LT		 103
104#include <asm/io.h>
105#include <asm/system.h>
106#include <asm/uaccess.h>
107
3e795de7 108#define MAX_NR_CON_DRIVER 16
1da177e4 109
6db4063c 110#define CON_DRIVER_FLAG_MODULE 1
928e964f
AD		 111#define CON_DRIVER_FLAG_INIT 2
112#define CON_DRIVER_FLAG_ATTR 4
3e795de7
AD		 113
114struct con_driver {
115 const struct consw *con;
116 const char *desc;
805952a8 117 struct device *dev;
6db4063c 118 int node;
3e795de7
AD		 119 int first;
120 int last;
121 int flag;
122};
123
124static struct con_driver registered_con_driver[MAX_NR_CON_DRIVER];
1da177e4
LT		 125const struct consw *conswitchp;
126
127/* A bitmap for codes <32. A bit of 1 indicates that the code
128 * corresponding to that bit number invokes some special action
129 * (such as cursor movement) and should not be displayed as a
130 * glyph unless the disp_ctrl mode is explicitly enabled.
131 */
132#define CTRL_ACTION 0x0d00ff81
133#define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */
134
135/*
136 * Here is the default bell parameters: 750HZ, 1/8th of a second
137 */
138#define DEFAULT_BELL_PITCH 750
139#define DEFAULT_BELL_DURATION (HZ/8)
140
1da177e4
LT		 141struct vc vc_cons [MAX_NR_CONSOLES];
142
143#ifndef VT_SINGLE_DRIVER
144static const struct consw *con_driver_map[MAX_NR_CONSOLES];
145#endif
146
147static int con_open(struct tty_struct *, struct file *);
148static void vc_init(struct vc_data *vc, unsigned int rows,
149 unsigned int cols, int do_clear);
150static void gotoxy(struct vc_data *vc, int new_x, int new_y);
151static void save_cur(struct vc_data *vc);
152static void reset_terminal(struct vc_data *vc, int do_clear);
153static void con_flush_chars(struct tty_struct *tty);
403aac96 154static int set_vesa_blanking(char __user *p);
1da177e4
LT		 155static void set_cursor(struct vc_data *vc);
156static void hide_cursor(struct vc_data *vc);
65f27f38 157static void console_callback(struct work_struct *ignored);
1da177e4
LT		 158static void blank_screen_t(unsigned long dummy);
159static void set_palette(struct vc_data *vc);
160
161static int printable; /* Is console ready for printing? */
77bf2bab 162int default_utf8 = true;
042f10ec 163module_param(default_utf8, int, S_IRUGO | S_IWUSR);
1da177e4
LT		 164
165/*
166 * ignore_poke: don't unblank the screen when things are typed. This is
167 * mainly for the privacy of braille terminal users.
168 */
169static int ignore_poke;
170
171int do_poke_blanked_console;
172int console_blanked;
173
174static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
175static int blankinterval = 10*60*HZ;
176static int vesa_off_interval;
177
65f27f38 178static DECLARE_WORK(console_work, console_callback);
1da177e4
LT		 179
180/*
181 * fg_console is the current virtual console,
182 * last_console is the last used one,
183 * want_console is the console we want to switch to,
184 * kmsg_redirect is the console for kernel messages,
185 */
186int fg_console;
187int last_console;
188int want_console = -1;
189int kmsg_redirect;
190
191/*
192 * For each existing display, we have a pointer to console currently visible
193 * on that display, allowing consoles other than fg_console to be refreshed
194 * appropriately. Unless the low-level driver supplies its own display_fg
195 * variable, we use this one for the "master display".
196 */
197static struct vc_data *master_display_fg;
198
199/*
200 * Unfortunately, we need to delay tty echo when we're currently writing to the
201 * console since the code is (and always was) not re-entrant, so we schedule
202 * all flip requests to process context with schedule-task() and run it from
203 * console_callback().
204 */
205
206/*
207 * For the same reason, we defer scrollback to the console callback.
208 */
209static int scrollback_delta;
210
211/*
212 * Hook so that the power management routines can (un)blank
213 * the console on our behalf.
214 */
215int (*console_blank_hook)(int);
216
40565f19 217static DEFINE_TIMER(console_timer, blank_screen_t, 0, 0);
1da177e4
LT		 218static int blank_state;
219static int blank_timer_expired;
220enum {
221 blank_off = 0,
222 blank_normal_wait,
223 blank_vesa_wait,
224};
225
b293d758
ST		 226/*
227 * Notifier list for console events.
228 */
229static ATOMIC_NOTIFIER_HEAD(vt_notifier_list);
230
231int register_vt_notifier(struct notifier_block *nb)
232{
233 return atomic_notifier_chain_register(&vt_notifier_list, nb);
234}
235EXPORT_SYMBOL_GPL(register_vt_notifier);
236
237int unregister_vt_notifier(struct notifier_block *nb)
238{
239 return atomic_notifier_chain_unregister(&vt_notifier_list, nb);
240}
241EXPORT_SYMBOL_GPL(unregister_vt_notifier);
242
243static void notify_write(struct vc_data *vc, unsigned int unicode)
244{
245 struct vt_notifier_param param = { .vc = vc, unicode = unicode };
246 atomic_notifier_call_chain(&vt_notifier_list, VT_WRITE, &param);
247}
248
249static void notify_update(struct vc_data *vc)
250{
251 struct vt_notifier_param param = { .vc = vc };
252 atomic_notifier_call_chain(&vt_notifier_list, VT_UPDATE, &param);
253}
254
1da177e4
LT		 255/*
256 * Low-Level Functions
257 */
258
259#define IS_FG(vc) ((vc)->vc_num == fg_console)
260
261#ifdef VT_BUF_VRAM_ONLY
262#define DO_UPDATE(vc) 0
263#else
264#define DO_UPDATE(vc) CON_IS_VISIBLE(vc)
265#endif
266
267static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed)
268{
269 unsigned short *p;
270
271 if (!viewed)
272 p = (unsigned short *)(vc->vc_origin + offset);
273 else if (!vc->vc_sw->con_screen_pos)
274 p = (unsigned short *)(vc->vc_visible_origin + offset);
275 else
276 p = vc->vc_sw->con_screen_pos(vc, offset);
277 return p;
278}
279
280static inline void scrolldelta(int lines)
281{
282 scrollback_delta += lines;
283 schedule_console_callback();
284}
285
286void schedule_console_callback(void)
287{
288 schedule_work(&console_work);
289}
290
291static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
292{
293 unsigned short *d, *s;
294
295 if (t+nr >= b)
296 nr = b - t - 1;
297 if (b > vc->vc_rows || t >= b || nr < 1)
298 return;
299 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr))
300 return;
301 d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
302 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr));
303 scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row);
c9e587ab 304 scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_scrl_erase_char,
1da177e4
LT		 305 vc->vc_size_row * nr);
306}
307
308static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
309{
310 unsigned short *s;
311 unsigned int step;
312
313 if (t+nr >= b)
314 nr = b - t - 1;
315 if (b > vc->vc_rows || t >= b || nr < 1)
316 return;
317 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr))
318 return;
319 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
320 step = vc->vc_cols * nr;
321 scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row);
c9e587ab 322 scr_memsetw(s, vc->vc_scrl_erase_char, 2 * step);
1da177e4
LT		 323}
324
325static void do_update_region(struct vc_data *vc, unsigned long start, int count)
326{
327#ifndef VT_BUF_VRAM_ONLY
328 unsigned int xx, yy, offset;
329 u16 *p;
330
331 p = (u16 *) start;
332 if (!vc->vc_sw->con_getxy) {
333 offset = (start - vc->vc_origin) / 2;
334 xx = offset % vc->vc_cols;
335 yy = offset / vc->vc_cols;
336 } else {
337 int nxx, nyy;
338 start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy);
339 xx = nxx; yy = nyy;
340 }
341 for(;;) {
342 u16 attrib = scr_readw(p) & 0xff00;
343 int startx = xx;
344 u16 *q = p;
345 while (xx < vc->vc_cols && count) {
346 if (attrib != (scr_readw(p) & 0xff00)) {
347 if (p > q)
348 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
349 startx = xx;
350 q = p;
351 attrib = scr_readw(p) & 0xff00;
352 }
353 p++;
354 xx++;
355 count--;
356 }
357 if (p > q)
358 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
359 if (!count)
360 break;
361 xx = 0;
362 yy++;
363 if (vc->vc_sw->con_getxy) {
364 p = (u16 *)start;
365 start = vc->vc_sw->con_getxy(vc, start, NULL, NULL);
366 }
367 }
368#endif
369}
370
371void update_region(struct vc_data *vc, unsigned long start, int count)
372{
373 WARN_CONSOLE_UNLOCKED();
374
375 if (DO_UPDATE(vc)) {
376 hide_cursor(vc);
377 do_update_region(vc, start, count);
378 set_cursor(vc);
379 }
380}
381
382/* Structure of attributes is hardware-dependent */
383
fa6ce9ab
JE		 384static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink,
385 u8 _underline, u8 _reverse, u8 _italic)
1da177e4
LT		 386{
387 if (vc->vc_sw->con_build_attr)
fa6ce9ab
JE		 388 return vc->vc_sw->con_build_attr(vc, _color, _intensity,
389 _blink, _underline, _reverse, _italic);
1da177e4
LT		 390
391#ifndef VT_BUF_VRAM_ONLY
392/*
393 * ++roman: I completely changed the attribute format for monochrome
394 * mode (!can_do_color). The formerly used MDA (monochrome display
395 * adapter) format didn't allow the combination of certain effects.
396 * Now the attribute is just a bit vector:
397 * Bit 0..1: intensity (0..2)
398 * Bit 2 : underline
399 * Bit 3 : reverse
400 * Bit 7 : blink
401 */
402 {
c9e587ab 403 u8 a = _color;
1da177e4
LT		 404 if (!vc->vc_can_do_color)
405 return _intensity |
fa6ce9ab 406 (_italic ? 2 : 0) |
1da177e4
LT		 407 (_underline ? 4 : 0) |
408 (_reverse ? 8 : 0) |
409 (_blink ? 0x80 : 0);
fa6ce9ab
JE		 410 if (_italic)
411 a = (a & 0xF0) | vc->vc_itcolor;
412 else if (_underline)
1da177e4
LT		 413 a = (a & 0xf0) | vc->vc_ulcolor;
414 else if (_intensity == 0)
415 a = (a & 0xf0) | vc->vc_ulcolor;
416 if (_reverse)
417 a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77);
418 if (_blink)
419 a ^= 0x80;
420 if (_intensity == 2)
421 a ^= 0x08;
422 if (vc->vc_hi_font_mask == 0x100)
423 a <<= 1;
424 return a;
425 }
426#else
427 return 0;
428#endif
429}
430
431static void update_attr(struct vc_data *vc)
432{
fa6ce9ab
JE		 433 vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity,
434 vc->vc_blink, vc->vc_underline,
435 vc->vc_reverse ^ vc->vc_decscnm, vc->vc_italic);
436 vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm, 0) << 8) | ' ';
c9e587ab 437 vc->vc_scrl_erase_char = (build_attr(vc, vc->vc_def_color, 1, false, false, false, false) << 8) | ' ';
1da177e4
LT		 438}
439
440/* Note: inverting the screen twice should revert to the original state */
441void invert_screen(struct vc_data *vc, int offset, int count, int viewed)
442{
443 unsigned short *p;
444
445 WARN_CONSOLE_UNLOCKED();
446
447 count /= 2;
448 p = screenpos(vc, offset, viewed);
449 if (vc->vc_sw->con_invert_region)
450 vc->vc_sw->con_invert_region(vc, p, count);
451#ifndef VT_BUF_VRAM_ONLY
452 else {
453 u16 *q = p;
454 int cnt = count;
455 u16 a;
456
457 if (!vc->vc_can_do_color) {
458 while (cnt--) {
459 a = scr_readw(q);
460 a ^= 0x0800;
461 scr_writew(a, q);
462 q++;
463 }
464 } else if (vc->vc_hi_font_mask == 0x100) {
465 while (cnt--) {
466 a = scr_readw(q);
467 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4);
468 scr_writew(a, q);
469 q++;
470 }
471 } else {
472 while (cnt--) {
473 a = scr_readw(q);
474 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4);
475 scr_writew(a, q);
476 q++;
477 }
478 }
479 }
480#endif
481 if (DO_UPDATE(vc))
482 do_update_region(vc, (unsigned long) p, count);
483}
484
485/* used by selection: complement pointer position */
486void complement_pos(struct vc_data *vc, int offset)
487{
414edcd3 488 static int old_offset = -1;
1da177e4
LT		 489 static unsigned short old;
490 static unsigned short oldx, oldy;
491
492 WARN_CONSOLE_UNLOCKED();
493
414edcd3
AD		 494 if (old_offset != -1 && old_offset >= 0 &&
495 old_offset < vc->vc_screenbuf_size) {
496 scr_writew(old, screenpos(vc, old_offset, 1));
1da177e4
LT		 497 if (DO_UPDATE(vc))
498 vc->vc_sw->con_putc(vc, old, oldy, oldx);
499 }
414edcd3
AD		 500
501 old_offset = offset;
502
503 if (offset != -1 && offset >= 0 &&
504 offset < vc->vc_screenbuf_size) {
1da177e4 505 unsigned short new;
414edcd3 506 unsigned short *p;
1da177e4
LT		 507 p = screenpos(vc, offset, 1);
508 old = scr_readw(p);
509 new = old ^ vc->vc_complement_mask;
510 scr_writew(new, p);
511 if (DO_UPDATE(vc)) {
512 oldx = (offset >> 1) % vc->vc_cols;
513 oldy = (offset >> 1) / vc->vc_cols;
514 vc->vc_sw->con_putc(vc, new, oldy, oldx);
515 }
516 }
414edcd3 517
1da177e4
LT		 518}
519
520static void insert_char(struct vc_data *vc, unsigned int nr)
521{
522 unsigned short *p, *q = (unsigned short *)vc->vc_pos;
523
524 p = q + vc->vc_cols - nr - vc->vc_x;
525 while (--p >= q)
526 scr_writew(scr_readw(p), p + nr);
527 scr_memsetw(q, vc->vc_video_erase_char, nr * 2);
528 vc->vc_need_wrap = 0;
529 if (DO_UPDATE(vc)) {
530 unsigned short oldattr = vc->vc_attr;
531 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x, vc->vc_y, vc->vc_x + nr, 1,
532 vc->vc_cols - vc->vc_x - nr);
533 vc->vc_attr = vc->vc_video_erase_char >> 8;
534 while (nr--)
535 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y, vc->vc_x + nr);
536 vc->vc_attr = oldattr;
537 }
538}
539
540static void delete_char(struct vc_data *vc, unsigned int nr)
541{
542 unsigned int i = vc->vc_x;
543 unsigned short *p = (unsigned short *)vc->vc_pos;
544
545 while (++i <= vc->vc_cols - nr) {
546 scr_writew(scr_readw(p+nr), p);
547 p++;
548 }
549 scr_memsetw(p, vc->vc_video_erase_char, nr * 2);
550 vc->vc_need_wrap = 0;
551 if (DO_UPDATE(vc)) {
552 unsigned short oldattr = vc->vc_attr;
553 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x + nr, vc->vc_y, vc->vc_x, 1,
554 vc->vc_cols - vc->vc_x - nr);
555 vc->vc_attr = vc->vc_video_erase_char >> 8;
556 while (nr--)
557 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y,
558 vc->vc_cols - 1 - nr);
559 vc->vc_attr = oldattr;
560 }
561}
562
563static int softcursor_original;
564
565static void add_softcursor(struct vc_data *vc)
566{
567 int i = scr_readw((u16 *) vc->vc_pos);
568 u32 type = vc->vc_cursor_type;
569
570 if (! (type & 0x10)) return;
571 if (softcursor_original != -1) return;
572 softcursor_original = i;
573 i |= ((type >> 8) & 0xff00 );
574 i ^= ((type) & 0xff00 );
575 if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000;
576 if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700;
577 scr_writew(i, (u16 *) vc->vc_pos);
578 if (DO_UPDATE(vc))
579 vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x);
580}
581
582static void hide_softcursor(struct vc_data *vc)
583{
584 if (softcursor_original != -1) {
585 scr_writew(softcursor_original, (u16 *)vc->vc_pos);
586 if (DO_UPDATE(vc))
587 vc->vc_sw->con_putc(vc, softcursor_original,
588 vc->vc_y, vc->vc_x);
589 softcursor_original = -1;
590 }
591}
592
593static void hide_cursor(struct vc_data *vc)
594{
595 if (vc == sel_cons)
596 clear_selection();
597 vc->vc_sw->con_cursor(vc, CM_ERASE);
598 hide_softcursor(vc);
599}
600
601static void set_cursor(struct vc_data *vc)
602{
603 if (!IS_FG(vc) || console_blanked ||
604 vc->vc_mode == KD_GRAPHICS)
605 return;
606 if (vc->vc_deccm) {
607 if (vc == sel_cons)
608 clear_selection();
609 add_softcursor(vc);
610 if ((vc->vc_cursor_type & 0x0f) != 1)
611 vc->vc_sw->con_cursor(vc, CM_DRAW);
612 } else
613 hide_cursor(vc);
614}
615
616static void set_origin(struct vc_data *vc)
617{
618 WARN_CONSOLE_UNLOCKED();
619
620 if (!CON_IS_VISIBLE(vc) ||
621 !vc->vc_sw->con_set_origin ||
622 !vc->vc_sw->con_set_origin(vc))
623 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
624 vc->vc_visible_origin = vc->vc_origin;
625 vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size;
626 vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x;
627}
628
629static inline void save_screen(struct vc_data *vc)
630{
631 WARN_CONSOLE_UNLOCKED();
632
633 if (vc->vc_sw->con_save_screen)
634 vc->vc_sw->con_save_screen(vc);
635}
636
637/*
638 * Redrawing of screen
639 */
640
641static void clear_buffer_attributes(struct vc_data *vc)
642{
643 unsigned short *p = (unsigned short *)vc->vc_origin;
644 int count = vc->vc_screenbuf_size / 2;
645 int mask = vc->vc_hi_font_mask | 0xff;
646
647 for (; count > 0; count--, p++) {
648 scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p);
649 }
650}
651
652void redraw_screen(struct vc_data *vc, int is_switch)
653{
654 int redraw = 0;
655
656 WARN_CONSOLE_UNLOCKED();
657
658 if (!vc) {
659 /* strange ... */
660 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
661 return;
662 }
663
664 if (is_switch) {
665 struct vc_data *old_vc = vc_cons[fg_console].d;
666 if (old_vc == vc)
667 return;
668 if (!CON_IS_VISIBLE(vc))
669 redraw = 1;
670 *vc->vc_display_fg = vc;
671 fg_console = vc->vc_num;
672 hide_cursor(old_vc);
673 if (!CON_IS_VISIBLE(old_vc)) {
674 save_screen(old_vc);
675 set_origin(old_vc);
676 }
677 } else {
678 hide_cursor(vc);
679 redraw = 1;
680 }
681
682 if (redraw) {
683 int update;
684 int old_was_color = vc->vc_can_do_color;
685
686 set_origin(vc);
687 update = vc->vc_sw->con_switch(vc);
688 set_palette(vc);
689 /*
690 * If console changed from mono<->color, the best we can do
691 * is to clear the buffer attributes. As it currently stands,
692 * rebuilding new attributes from the old buffer is not doable
693 * without overly complex code.
694 */
695 if (old_was_color != vc->vc_can_do_color) {
696 update_attr(vc);
697 clear_buffer_attributes(vc);
698 }
699 if (update && vc->vc_mode != KD_GRAPHICS)
700 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
701 }
702 set_cursor(vc);
703 if (is_switch) {
704 set_leds();
705 compute_shiftstate();
8182ec49 706 notify_update(vc);
1da177e4
LT		 707 }
708}
709
710/*
711 * Allocation, freeing and resizing of VTs.
712 */
713
714int vc_cons_allocated(unsigned int i)
715{
716 return (i < MAX_NR_CONSOLES && vc_cons[i].d);
717}
718
719static void visual_init(struct vc_data *vc, int num, int init)
720{
721 /* ++Geert: vc->vc_sw->con_init determines console size */
722 if (vc->vc_sw)
723 module_put(vc->vc_sw->owner);
724 vc->vc_sw = conswitchp;
725#ifndef VT_SINGLE_DRIVER
726 if (con_driver_map[num])
727 vc->vc_sw = con_driver_map[num];
728#endif
729 __module_get(vc->vc_sw->owner);
730 vc->vc_num = num;
731 vc->vc_display_fg = &master_display_fg;
732 vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir;
733 vc->vc_uni_pagedir = 0;
734 vc->vc_hi_font_mask = 0;
735 vc->vc_complement_mask = 0;
736 vc->vc_can_do_color = 0;
737 vc->vc_sw->con_init(vc, init);
738 if (!vc->vc_complement_mask)
739 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
740 vc->vc_s_complement_mask = vc->vc_complement_mask;
741 vc->vc_size_row = vc->vc_cols << 1;
742 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
743}
744
745int vc_allocate(unsigned int currcons) /* return 0 on success */
746{
747 WARN_CONSOLE_UNLOCKED();
748
749 if (currcons >= MAX_NR_CONSOLES)
750 return -ENXIO;
751 if (!vc_cons[currcons].d) {
752 struct vc_data *vc;
b293d758 753 struct vt_notifier_param param;
1da177e4
LT		 754
755 /* prevent users from taking too much memory */
756 if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE))
757 return -EPERM;
758
759 /* due to the granularity of kmalloc, we waste some memory here */
760 /* the alloc is done in two steps, to optimize the common situation
761 of a 25x80 console (structsize=216, screenbuf_size=4000) */
762 /* although the numbers above are not valid since long ago, the
763 point is still up-to-date and the comment still has its value
764 even if only as a historical artifact. --mj, July 1998 */
b293d758 765 param.vc = vc = kzalloc(sizeof(struct vc_data), GFP_KERNEL);
1da177e4
LT		 766 if (!vc)
767 return -ENOMEM;
1da177e4 768 vc_cons[currcons].d = vc;
c2c88f10 769 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
1da177e4
LT		 770 visual_init(vc, currcons, 1);
771 if (!*vc->vc_uni_pagedir_loc)
772 con_set_default_unimap(vc);
254e948b
CM		 773 if (!vc->vc_kmalloced)
774 vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL);
1da177e4
LT		 775 if (!vc->vc_screenbuf) {
776 kfree(vc);
777 vc_cons[currcons].d = NULL;
778 return -ENOMEM;
779 }
780 vc->vc_kmalloced = 1;
781 vc_init(vc, vc->vc_rows, vc->vc_cols, 1);
b293d758 782 atomic_notifier_call_chain(&vt_notifier_list, VT_ALLOCATE, &param);
1da177e4
LT		 783 }
784 return 0;
785}
786
e400b6ec
AD		 787static inline int resize_screen(struct vc_data *vc, int width, int height,
788 int user)
1da177e4
LT		 789{
790 /* Resizes the resolution of the display adapater */
791 int err = 0;
792
793 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize)
e400b6ec
AD		 794 err = vc->vc_sw->con_resize(vc, width, height, user);
795
1da177e4
LT		 796 return err;
797}
798
799/*
800 * Change # of rows and columns (0 means unchanged/the size of fg_console)
801 * [this is to be used together with some user program
802 * like resize that changes the hardware videomode]
803 */
804#define VC_RESIZE_MAXCOL (32767)
805#define VC_RESIZE_MAXROW (32767)
806int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int lines)
807{
808 unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0;
809 unsigned int old_cols, old_rows, old_row_size, old_screen_size;
810 unsigned int new_cols, new_rows, new_row_size, new_screen_size;
e400b6ec 811 unsigned int end, user;
1da177e4
LT		 812 unsigned short *newscreen;
813
814 WARN_CONSOLE_UNLOCKED();
815
816 if (!vc)
817 return -ENXIO;
818
e400b6ec
AD		 819 user = vc->vc_resize_user;
820 vc->vc_resize_user = 0;
821
1da177e4
LT		 822 if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW)
823 return -EINVAL;
824
825 new_cols = (cols ? cols : vc->vc_cols);
826 new_rows = (lines ? lines : vc->vc_rows);
827 new_row_size = new_cols << 1;
828 new_screen_size = new_row_size * new_rows;
829
830 if (new_cols == vc->vc_cols && new_rows == vc->vc_rows)
831 return 0;
832
5cbded58 833 newscreen = kmalloc(new_screen_size, GFP_USER);
1da177e4
LT		 834 if (!newscreen)
835 return -ENOMEM;
836
837 old_rows = vc->vc_rows;
838 old_cols = vc->vc_cols;
839 old_row_size = vc->vc_size_row;
840 old_screen_size = vc->vc_screenbuf_size;
841
e400b6ec 842 err = resize_screen(vc, new_cols, new_rows, user);
1da177e4
LT		 843 if (err) {
844 kfree(newscreen);
845 return err;
846 }
847
848 vc->vc_rows = new_rows;
849 vc->vc_cols = new_cols;
850 vc->vc_size_row = new_row_size;
851 vc->vc_screenbuf_size = new_screen_size;
852
853 rlth = min(old_row_size, new_row_size);
854 rrem = new_row_size - rlth;
855 old_origin = vc->vc_origin;
856 new_origin = (long) newscreen;
857 new_scr_end = new_origin + new_screen_size;
3b41dc1a
AD		 858
859 if (vc->vc_y > new_rows) {
860 if (old_rows - vc->vc_y < new_rows) {
861 /*
862 * Cursor near the bottom, copy contents from the
863 * bottom of buffer
864 */
865 old_origin += (old_rows - new_rows) * old_row_size;
866 end = vc->vc_scr_end;
867 } else {
868 /*
869 * Cursor is in no man's land, copy 1/2 screenful
870 * from the top and bottom of cursor position
871 */
872 old_origin += (vc->vc_y - new_rows/2) * old_row_size;
065d9cac 873 end = old_origin + (old_row_size * new_rows);
3b41dc1a
AD		 874 }
875 } else
876 /*
877 * Cursor near the top, copy contents from the top of buffer
878 */
065d9cac
AD		 879 end = (old_rows > new_rows) ? old_origin +
880 (old_row_size * new_rows) :
3b41dc1a 881 vc->vc_scr_end;
1da177e4
LT		 882
883 update_attr(vc);
884
3b41dc1a
AD		 885 while (old_origin < end) {
886 scr_memcpyw((unsigned short *) new_origin,
887 (unsigned short *) old_origin, rlth);
1da177e4 888 if (rrem)
3b41dc1a
AD		 889 scr_memsetw((void *)(new_origin + rlth),
890 vc->vc_video_erase_char, rrem);
1da177e4
LT		 891 old_origin += old_row_size;
892 new_origin += new_row_size;
893 }
894 if (new_scr_end > new_origin)
3b41dc1a
AD		 895 scr_memsetw((void *)new_origin, vc->vc_video_erase_char,
896 new_scr_end - new_origin);
1da177e4
LT		 897 if (vc->vc_kmalloced)
898 kfree(vc->vc_screenbuf);
899 vc->vc_screenbuf = newscreen;
900 vc->vc_kmalloced = 1;
901 vc->vc_screenbuf_size = new_screen_size;
902 set_origin(vc);
903
904 /* do part of a reset_terminal() */
905 vc->vc_top = 0;
906 vc->vc_bottom = vc->vc_rows;
907 gotoxy(vc, vc->vc_x, vc->vc_y);
908 save_cur(vc);
909
910 if (vc->vc_tty) {
911 struct winsize ws, *cws = &vc->vc_tty->winsize;
912
913 memset(&ws, 0, sizeof(ws));
914 ws.ws_row = vc->vc_rows;
915 ws.ws_col = vc->vc_cols;
916 ws.ws_ypixel = vc->vc_scan_lines;
917 if ((ws.ws_row != cws->ws_row || ws.ws_col != cws->ws_col) &&
ab521dc0
EB		 918 vc->vc_tty->pgrp)
919 kill_pgrp(vc->vc_tty->pgrp, SIGWINCH, 1);
1da177e4
LT		 920 *cws = ws;
921 }
922
923 if (CON_IS_VISIBLE(vc))
924 update_screen(vc);
925 return err;
926}
927
ca9bda00
AC		 928int vc_lock_resize(struct vc_data *vc, unsigned int cols, unsigned int lines)
929{
930 int rc;
931
932 acquire_console_sem();
933 rc = vc_resize(vc, cols, lines);
934 release_console_sem();
935 return rc;
936}
1da177e4 937
ca9bda00 938void vc_deallocate(unsigned int currcons)
1da177e4
LT		 939{
940 WARN_CONSOLE_UNLOCKED();
941
942 if (vc_cons_allocated(currcons)) {
943 struct vc_data *vc = vc_cons[currcons].d;
b293d758
ST		 944 struct vt_notifier_param param = { .vc = vc };
945 atomic_notifier_call_chain(&vt_notifier_list, VT_DEALLOCATE, &param);
1da177e4 946 vc->vc_sw->con_deinit(vc);
bde0d2c9 947 put_pid(vc->vt_pid);
d459ec0b 948 module_put(vc->vc_sw->owner);
1da177e4
LT		 949 if (vc->vc_kmalloced)
950 kfree(vc->vc_screenbuf);
951 if (currcons >= MIN_NR_CONSOLES)
952 kfree(vc);
953 vc_cons[currcons].d = NULL;
954 }
955}
956
957/*
958 * VT102 emulator
959 */
960
961#define set_kbd(vc, x) set_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
962#define clr_kbd(vc, x) clr_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
963#define is_kbd(vc, x) vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
964
965#define decarm VC_REPEAT
966#define decckm VC_CKMODE
967#define kbdapplic VC_APPLIC
968#define lnm VC_CRLF
969
970/*
971 * this is what the terminal answers to a ESC-Z or csi0c query.
972 */
973#define VT100ID "\033[?1;2c"
974#define VT102ID "\033[?6c"
975
976unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7,
977 8,12,10,14, 9,13,11,15 };
978
979/* the default colour table, for VGA+ colour systems */
980int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
981 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
982int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
983 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
984int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
985 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
986
1c2bbe6a
JE		 987module_param_array(default_red, int, NULL, S_IRUGO | S_IWUSR);
988module_param_array(default_grn, int, NULL, S_IRUGO | S_IWUSR);
989module_param_array(default_blu, int, NULL, S_IRUGO | S_IWUSR);
990
1da177e4
LT		 991/*
992 * gotoxy() must verify all boundaries, because the arguments
993 * might also be negative. If the given position is out of
994 * bounds, the cursor is placed at the nearest margin.
995 */
996static void gotoxy(struct vc_data *vc, int new_x, int new_y)
997{
998 int min_y, max_y;
999
1000 if (new_x < 0)
1001 vc->vc_x = 0;
1002 else {
1003 if (new_x >= vc->vc_cols)
1004 vc->vc_x = vc->vc_cols - 1;
1005 else
1006 vc->vc_x = new_x;
1007 }
1008
1009 if (vc->vc_decom) {
1010 min_y = vc->vc_top;
1011 max_y = vc->vc_bottom;
1012 } else {
1013 min_y = 0;
1014 max_y = vc->vc_rows;
1015 }
1016 if (new_y < min_y)
1017 vc->vc_y = min_y;
1018 else if (new_y >= max_y)
1019 vc->vc_y = max_y - 1;
1020 else
1021 vc->vc_y = new_y;
1022 vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1);
1023 vc->vc_need_wrap = 0;
1024}
1025
1026/* for absolute user moves, when decom is set */
1027static void gotoxay(struct vc_data *vc, int new_x, int new_y)
1028{
1029 gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y);
1030}
1031
1032void scrollback(struct vc_data *vc, int lines)
1033{
1034 if (!lines)
1035 lines = vc->vc_rows / 2;
1036 scrolldelta(-lines);
1037}
1038
1039void scrollfront(struct vc_data *vc, int lines)
1040{
1041 if (!lines)
1042 lines = vc->vc_rows / 2;
1043 scrolldelta(lines);
1044}
1045
1046static void lf(struct vc_data *vc)
1047{
1048 /* don't scroll if above bottom of scrolling region, or
1049 * if below scrolling region
1050 */
1051 if (vc->vc_y + 1 == vc->vc_bottom)
1052 scrup(vc, vc->vc_top, vc->vc_bottom, 1);
1053 else if (vc->vc_y < vc->vc_rows - 1) {
1054 vc->vc_y++;
1055 vc->vc_pos += vc->vc_size_row;
1056 }
1057 vc->vc_need_wrap = 0;
b293d758 1058 notify_write(vc, '\n');
1da177e4
LT		 1059}
1060
1061static void ri(struct vc_data *vc)
1062{
1063 /* don't scroll if below top of scrolling region, or
1064 * if above scrolling region
1065 */
1066 if (vc->vc_y == vc->vc_top)
1067 scrdown(vc, vc->vc_top, vc->vc_bottom, 1);
1068 else if (vc->vc_y > 0) {
1069 vc->vc_y--;
1070 vc->vc_pos -= vc->vc_size_row;
1071 }
1072 vc->vc_need_wrap = 0;
1073}
1074
1075static inline void cr(struct vc_data *vc)
1076{
1077 vc->vc_pos -= vc->vc_x << 1;
1078 vc->vc_need_wrap = vc->vc_x = 0;
b293d758 1079 notify_write(vc, '\r');
1da177e4
LT		 1080}
1081
1082static inline void bs(struct vc_data *vc)
1083{
1084 if (vc->vc_x) {
1085 vc->vc_pos -= 2;
1086 vc->vc_x--;
1087 vc->vc_need_wrap = 0;
b293d758 1088 notify_write(vc, '\b');
1da177e4
LT		 1089 }
1090}
1091
1092static inline void del(struct vc_data *vc)
1093{
1094 /* ignored */
1095}
1096
1097static void csi_J(struct vc_data *vc, int vpar)
1098{
1099 unsigned int count;
1100 unsigned short * start;
1101
1102 switch (vpar) {
1103 case 0: /* erase from cursor to end of display */
1104 count = (vc->vc_scr_end - vc->vc_pos) >> 1;
1105 start = (unsigned short *)vc->vc_pos;
1106 if (DO_UPDATE(vc)) {
1107 /* do in two stages */
1108 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1109 vc->vc_cols - vc->vc_x);
1110 vc->vc_sw->con_clear(vc, vc->vc_y + 1, 0,
1111 vc->vc_rows - vc->vc_y - 1,
1112 vc->vc_cols);
1113 }
1114 break;
1115 case 1: /* erase from start to cursor */
1116 count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1;
1117 start = (unsigned short *)vc->vc_origin;
1118 if (DO_UPDATE(vc)) {
1119 /* do in two stages */
1120 vc->vc_sw->con_clear(vc, 0, 0, vc->vc_y,
1121 vc->vc_cols);
1122 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1123 vc->vc_x + 1);
1124 }
1125 break;
1126 case 2: /* erase whole display */
1127 count = vc->vc_cols * vc->vc_rows;
1128 start = (unsigned short *)vc->vc_origin;
1129 if (DO_UPDATE(vc))
1130 vc->vc_sw->con_clear(vc, 0, 0,
1131 vc->vc_rows,
1132 vc->vc_cols);
1133 break;
1134 default:
1135 return;
1136 }
1137 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1138 vc->vc_need_wrap = 0;
1139}
1140
1141static void csi_K(struct vc_data *vc, int vpar)
1142{
1143 unsigned int count;
1144 unsigned short * start;
1145
1146 switch (vpar) {
1147 case 0: /* erase from cursor to end of line */
1148 count = vc->vc_cols - vc->vc_x;
1149 start = (unsigned short *)vc->vc_pos;
1150 if (DO_UPDATE(vc))
1151 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1152 vc->vc_cols - vc->vc_x);
1153 break;
1154 case 1: /* erase from start of line to cursor */
1155 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1156 count = vc->vc_x + 1;
1157 if (DO_UPDATE(vc))
1158 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1159 vc->vc_x + 1);
1160 break;
1161 case 2: /* erase whole line */
1162 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1163 count = vc->vc_cols;
1164 if (DO_UPDATE(vc))
1165 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1166 vc->vc_cols);
1167 break;
1168 default:
1169 return;
1170 }
1171 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1172 vc->vc_need_wrap = 0;
1173}
1174
1175static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */
1176{ /* not vt100? */
1177 int count;
1178
1179 if (!vpar)
1180 vpar++;
1181 count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar;
1182
1183 scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count);
1184 if (DO_UPDATE(vc))
1185 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count);
1186 vc->vc_need_wrap = 0;
1187}
1188
1189static void default_attr(struct vc_data *vc)
1190{
1191 vc->vc_intensity = 1;
fa6ce9ab 1192 vc->vc_italic = 0;
1da177e4
LT		 1193 vc->vc_underline = 0;
1194 vc->vc_reverse = 0;
1195 vc->vc_blink = 0;
1196 vc->vc_color = vc->vc_def_color;
1197}
1198
1199/* console_sem is held */
1200static void csi_m(struct vc_data *vc)
1201{
1202 int i;
1203
1204 for (i = 0; i <= vc->vc_npar; i++)
1205 switch (vc->vc_par[i]) {
1206 case 0: /* all attributes off */
1207 default_attr(vc);
1208 break;
1209 case 1:
1210 vc->vc_intensity = 2;
1211 break;
1212 case 2:
1213 vc->vc_intensity = 0;
1214 break;
fa6ce9ab
JE		 1215 case 3:
1216 vc->vc_italic = 1;
1217 break;
1da177e4
LT		 1218 case 4:
1219 vc->vc_underline = 1;
1220 break;
1221 case 5:
1222 vc->vc_blink = 1;
1223 break;
1224 case 7:
1225 vc->vc_reverse = 1;
1226 break;
1227 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1228 * Select primary font, don't display
1229 * control chars if defined, don't set
1230 * bit 8 on output.
1231 */
1232 vc->vc_translate = set_translate(vc->vc_charset == 0
1233 ? vc->vc_G0_charset
1234 : vc->vc_G1_charset, vc);
1235 vc->vc_disp_ctrl = 0;
1236 vc->vc_toggle_meta = 0;
1237 break;
1238 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1239 * Select first alternate font, lets
1240 * chars < 32 be displayed as ROM chars.
1241 */
1242 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1243 vc->vc_disp_ctrl = 1;
1244 vc->vc_toggle_meta = 0;
1245 break;
1246 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1247 * Select second alternate font, toggle
1248 * high bit before displaying as ROM char.
1249 */
1250 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1251 vc->vc_disp_ctrl = 1;
1252 vc->vc_toggle_meta = 1;
1253 break;
1254 case 21:
1255 case 22:
1256 vc->vc_intensity = 1;
1257 break;
fa6ce9ab
JE		 1258 case 23:
1259 vc->vc_italic = 0;
1260 break;
1da177e4
LT		 1261 case 24:
1262 vc->vc_underline = 0;
1263 break;
1264 case 25:
1265 vc->vc_blink = 0;
1266 break;
1267 case 27:
1268 vc->vc_reverse = 0;
1269 break;
1270 case 38: /* ANSI X3.64-1979 (SCO-ish?)
1271 * Enables underscore, white foreground
1272 * with white underscore (Linux - use
1273 * default foreground).
1274 */
1275 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1276 vc->vc_underline = 1;
1277 break;
1278 case 39: /* ANSI X3.64-1979 (SCO-ish?)
1279 * Disable underline option.
1280 * Reset colour to default? It did this
1281 * before...
1282 */
1283 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1284 vc->vc_underline = 0;
1285 break;
1286 case 49:
1287 vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f);
1288 break;
1289 default:
1290 if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37)
1291 vc->vc_color = color_table[vc->vc_par[i] - 30]
1292 | (vc->vc_color & 0xf0);
1293 else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47)
1294 vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4)
1295 | (vc->vc_color & 0x0f);
1296 break;
1297 }
1298 update_attr(vc);
1299}
1300
1301static void respond_string(const char *p, struct tty_struct *tty)
1302{
1303 while (*p) {
1304 tty_insert_flip_char(tty, *p, 0);
1305 p++;
1306 }
1307 con_schedule_flip(tty);
1308}
1309
1310static void cursor_report(struct vc_data *vc, struct tty_struct *tty)
1311{
1312 char buf[40];
1313
1314 sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1);
1315 respond_string(buf, tty);
1316}
1317
1318static inline void status_report(struct tty_struct *tty)
1319{
1320 respond_string("\033[0n", tty); /* Terminal ok */
1321}
1322
1323static inline void respond_ID(struct tty_struct * tty)
1324{
1325 respond_string(VT102ID, tty);
1326}
1327
1328void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry)
1329{
1330 char buf[8];
1331
1332 sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx),
1333 (char)('!' + mry));
1334 respond_string(buf, tty);
1335}
1336
1337/* invoked via ioctl(TIOCLINUX) and through set_selection */
1338int mouse_reporting(void)
1339{
1340 return vc_cons[fg_console].d->vc_report_mouse;
1341}
1342
1343/* console_sem is held */
1344static void set_mode(struct vc_data *vc, int on_off)
1345{
1346 int i;
1347
1348 for (i = 0; i <= vc->vc_npar; i++)
1349 if (vc->vc_ques) {
1350 switch(vc->vc_par[i]) { /* DEC private modes set/reset */
1351 case 1: /* Cursor keys send ^[Ox/^[[x */
1352 if (on_off)
1353 set_kbd(vc, decckm);
1354 else
1355 clr_kbd(vc, decckm);
1356 break;
1357 case 3: /* 80/132 mode switch unimplemented */
1358 vc->vc_deccolm = on_off;
1359#if 0
1360 vc_resize(deccolm ? 132 : 80, vc->vc_rows);
1361 /* this alone does not suffice; some user mode
1362 utility has to change the hardware regs */
1363#endif
1364 break;
1365 case 5: /* Inverted screen on/off */
1366 if (vc->vc_decscnm != on_off) {
1367 vc->vc_decscnm = on_off;
1368 invert_screen(vc, 0, vc->vc_screenbuf_size, 0);
1369 update_attr(vc);
1370 }
1371 break;
1372 case 6: /* Origin relative/absolute */
1373 vc->vc_decom = on_off;
1374 gotoxay(vc, 0, 0);
1375 break;
1376 case 7: /* Autowrap on/off */
1377 vc->vc_decawm = on_off;
1378 break;
1379 case 8: /* Autorepeat on/off */
1380 if (on_off)
1381 set_kbd(vc, decarm);
1382 else
1383 clr_kbd(vc, decarm);
1384 break;
1385 case 9:
1386 vc->vc_report_mouse = on_off ? 1 : 0;
1387 break;
1388 case 25: /* Cursor on/off */
1389 vc->vc_deccm = on_off;
1390 break;
1391 case 1000:
1392 vc->vc_report_mouse = on_off ? 2 : 0;
1393 break;
1394 }
1395 } else {
1396 switch(vc->vc_par[i]) { /* ANSI modes set/reset */
1397 case 3: /* Monitor (display ctrls) */
1398 vc->vc_disp_ctrl = on_off;
1399 break;
1400 case 4: /* Insert Mode on/off */
1401 vc->vc_decim = on_off;
1402 break;
1403 case 20: /* Lf, Enter == CrLf/Lf */
1404 if (on_off)
1405 set_kbd(vc, lnm);
1406 else
1407 clr_kbd(vc, lnm);
1408 break;
1409 }
1410 }
1411}
1412
1413/* console_sem is held */
1414static void setterm_command(struct vc_data *vc)
1415{
1416 switch(vc->vc_par[0]) {
1417 case 1: /* set color for underline mode */
1418 if (vc->vc_can_do_color &&
1419 vc->vc_par[1] < 16) {
1420 vc->vc_ulcolor = color_table[vc->vc_par[1]];
1421 if (vc->vc_underline)
1422 update_attr(vc);
1423 }
1424 break;
1425 case 2: /* set color for half intensity mode */
1426 if (vc->vc_can_do_color &&
1427 vc->vc_par[1] < 16) {
1428 vc->vc_halfcolor = color_table[vc->vc_par[1]];
1429 if (vc->vc_intensity == 0)
1430 update_attr(vc);
1431 }
1432 break;
1433 case 8: /* store colors as defaults */
1434 vc->vc_def_color = vc->vc_attr;
1435 if (vc->vc_hi_font_mask == 0x100)
1436 vc->vc_def_color >>= 1;
1437 default_attr(vc);
1438 update_attr(vc);
1439 break;
1440 case 9: /* set blanking interval */
1441 blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1442 poke_blanked_console();
1443 break;
1444 case 10: /* set bell frequency in Hz */
1445 if (vc->vc_npar >= 1)
1446 vc->vc_bell_pitch = vc->vc_par[1];
1447 else
1448 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1449 break;
1450 case 11: /* set bell duration in msec */
1451 if (vc->vc_npar >= 1)
1452 vc->vc_bell_duration = (vc->vc_par[1] < 2000) ?
1453 vc->vc_par[1] * HZ / 1000 : 0;
1454 else
1455 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1456 break;
1457 case 12: /* bring specified console to the front */
1458 if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1))
1459 set_console(vc->vc_par[1] - 1);
1460 break;
1461 case 13: /* unblank the screen */
1462 poke_blanked_console();
1463 break;
1464 case 14: /* set vesa powerdown interval */
1465 vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1466 break;
1467 case 15: /* activate the previous console */
1468 set_console(last_console);
1469 break;
1470 }
1471}
1472
1473/* console_sem is held */
1474static void csi_at(struct vc_data *vc, unsigned int nr)
1475{
1476 if (nr > vc->vc_cols - vc->vc_x)
1477 nr = vc->vc_cols - vc->vc_x;
1478 else if (!nr)
1479 nr = 1;
1480 insert_char(vc, nr);
1481}
1482
1483/* console_sem is held */
1484static void csi_L(struct vc_data *vc, unsigned int nr)
1485{
1486 if (nr > vc->vc_rows - vc->vc_y)
1487 nr = vc->vc_rows - vc->vc_y;
1488 else if (!nr)
1489 nr = 1;
1490 scrdown(vc, vc->vc_y, vc->vc_bottom, nr);
1491 vc->vc_need_wrap = 0;
1492}
1493
1494/* console_sem is held */
1495static void csi_P(struct vc_data *vc, unsigned int nr)
1496{
1497 if (nr > vc->vc_cols - vc->vc_x)
1498 nr = vc->vc_cols - vc->vc_x;
1499 else if (!nr)
1500 nr = 1;
1501 delete_char(vc, nr);
1502}
1503
1504/* console_sem is held */
1505static void csi_M(struct vc_data *vc, unsigned int nr)
1506{
1507 if (nr > vc->vc_rows - vc->vc_y)
1508 nr = vc->vc_rows - vc->vc_y;
1509 else if (!nr)
1510 nr=1;
1511 scrup(vc, vc->vc_y, vc->vc_bottom, nr);
1512 vc->vc_need_wrap = 0;
1513}
1514
1515/* console_sem is held (except via vc_init->reset_terminal */
1516static void save_cur(struct vc_data *vc)
1517{
1518 vc->vc_saved_x = vc->vc_x;
1519 vc->vc_saved_y = vc->vc_y;
1520 vc->vc_s_intensity = vc->vc_intensity;
fa6ce9ab 1521 vc->vc_s_italic = vc->vc_italic;
1da177e4
LT		 1522 vc->vc_s_underline = vc->vc_underline;
1523 vc->vc_s_blink = vc->vc_blink;
1524 vc->vc_s_reverse = vc->vc_reverse;
1525 vc->vc_s_charset = vc->vc_charset;
1526 vc->vc_s_color = vc->vc_color;
1527 vc->vc_saved_G0 = vc->vc_G0_charset;
1528 vc->vc_saved_G1 = vc->vc_G1_charset;
1529}
1530
1531/* console_sem is held */
1532static void restore_cur(struct vc_data *vc)
1533{
1534 gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y);
1535 vc->vc_intensity = vc->vc_s_intensity;
fa6ce9ab 1536 vc->vc_italic = vc->vc_s_italic;
1da177e4
LT		 1537 vc->vc_underline = vc->vc_s_underline;
1538 vc->vc_blink = vc->vc_s_blink;
1539 vc->vc_reverse = vc->vc_s_reverse;
1540 vc->vc_charset = vc->vc_s_charset;
1541 vc->vc_color = vc->vc_s_color;
1542 vc->vc_G0_charset = vc->vc_saved_G0;
1543 vc->vc_G1_charset = vc->vc_saved_G1;
1544 vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc);
1545 update_attr(vc);
1546 vc->vc_need_wrap = 0;
1547}
1548
1549enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey,
1550 EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd,
1551 ESpalette };
1552
1553/* console_sem is held (except via vc_init()) */
1554static void reset_terminal(struct vc_data *vc, int do_clear)
1555{
1556 vc->vc_top = 0;
1557 vc->vc_bottom = vc->vc_rows;
1558 vc->vc_state = ESnormal;
1559 vc->vc_ques = 0;
1560 vc->vc_translate = set_translate(LAT1_MAP, vc);
1561 vc->vc_G0_charset = LAT1_MAP;
1562 vc->vc_G1_charset = GRAF_MAP;
1563 vc->vc_charset = 0;
1564 vc->vc_need_wrap = 0;
1565 vc->vc_report_mouse = 0;
042f10ec 1566 vc->vc_utf = default_utf8;
1da177e4
LT		 1567 vc->vc_utf_count = 0;
1568
1569 vc->vc_disp_ctrl = 0;
1570 vc->vc_toggle_meta = 0;
1571
1572 vc->vc_decscnm = 0;
1573 vc->vc_decom = 0;
1574 vc->vc_decawm = 1;
1575 vc->vc_deccm = 1;
1576 vc->vc_decim = 0;
1577
1578 set_kbd(vc, decarm);
1579 clr_kbd(vc, decckm);
1580 clr_kbd(vc, kbdapplic);
1581 clr_kbd(vc, lnm);
1582 kbd_table[vc->vc_num].lockstate = 0;
1583 kbd_table[vc->vc_num].slockstate = 0;
1584 kbd_table[vc->vc_num].ledmode = LED_SHOW_FLAGS;
1585 kbd_table[vc->vc_num].ledflagstate = kbd_table[vc->vc_num].default_ledflagstate;
1586 /* do not do set_leds here because this causes an endless tasklet loop
1587 when the keyboard hasn't been initialized yet */
1588
1589 vc->vc_cursor_type = CUR_DEFAULT;
1590 vc->vc_complement_mask = vc->vc_s_complement_mask;
1591
1592 default_attr(vc);
1593 update_attr(vc);
1594
1595 vc->vc_tab_stop[0] = 0x01010100;
1596 vc->vc_tab_stop[1] =
1597 vc->vc_tab_stop[2] =
1598 vc->vc_tab_stop[3] =
1599 vc->vc_tab_stop[4] = 0x01010101;
1600
1601 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1602 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1603
1604 gotoxy(vc, 0, 0);
1605 save_cur(vc);
1606 if (do_clear)
1607 csi_J(vc, 2);
1608}
1609
1610/* console_sem is held */
1611static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
1612{
1613 /*
1614 * Control characters can be used in the _middle_
1615 * of an escape sequence.
1616 */
1617 switch (c) {
1618 case 0:
1619 return;
1620 case 7:
1621 if (vc->vc_bell_duration)
1622 kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration);
1623 return;
1624 case 8:
1625 bs(vc);
1626 return;
1627 case 9:
1628 vc->vc_pos -= (vc->vc_x << 1);
1629 while (vc->vc_x < vc->vc_cols - 1) {
1630 vc->vc_x++;
1631 if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31)))
1632 break;
1633 }
1634 vc->vc_pos += (vc->vc_x << 1);
b293d758 1635 notify_write(vc, '\t');
1da177e4
LT		 1636 return;
1637 case 10: case 11: case 12:
1638 lf(vc);
1639 if (!is_kbd(vc, lnm))
1640 return;
1641 case 13:
1642 cr(vc);
1643 return;
1644 case 14:
1645 vc->vc_charset = 1;
1646 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1647 vc->vc_disp_ctrl = 1;
1648 return;
1649 case 15:
1650 vc->vc_charset = 0;
1651 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1652 vc->vc_disp_ctrl = 0;
1653 return;
1654 case 24: case 26:
1655 vc->vc_state = ESnormal;
1656 return;
1657 case 27:
1658 vc->vc_state = ESesc;
1659 return;
1660 case 127:
1661 del(vc);
1662 return;
1663 case 128+27:
1664 vc->vc_state = ESsquare;
1665 return;
1666 }
1667 switch(vc->vc_state) {
1668 case ESesc:
1669 vc->vc_state = ESnormal;
1670 switch (c) {
1671 case '[':
1672 vc->vc_state = ESsquare;
1673 return;
1674 case ']':
1675 vc->vc_state = ESnonstd;
1676 return;
1677 case '%':
1678 vc->vc_state = ESpercent;
1679 return;
1680 case 'E':
1681 cr(vc);
1682 lf(vc);
1683 return;
1684 case 'M':
1685 ri(vc);
1686 return;
1687 case 'D':
1688 lf(vc);
1689 return;
1690 case 'H':
1691 vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31));
1692 return;
1693 case 'Z':
1694 respond_ID(tty);
1695 return;
1696 case '7':
1697 save_cur(vc);
1698 return;
1699 case '8':
1700 restore_cur(vc);
1701 return;
1702 case '(':
1703 vc->vc_state = ESsetG0;
1704 return;
1705 case ')':
1706 vc->vc_state = ESsetG1;
1707 return;
1708 case '#':
1709 vc->vc_state = EShash;
1710 return;
1711 case 'c':
1712 reset_terminal(vc, 1);
1713 return;
1714 case '>': /* Numeric keypad */
1715 clr_kbd(vc, kbdapplic);
1716 return;
1717 case '=': /* Appl. keypad */
1718 set_kbd(vc, kbdapplic);
1719 return;
1720 }
1721 return;
1722 case ESnonstd:
1723 if (c=='P') { /* palette escape sequence */
1724 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1725 vc->vc_par[vc->vc_npar] = 0;
1726 vc->vc_npar = 0;
1727 vc->vc_state = ESpalette;
1728 return;
1729 } else if (c=='R') { /* reset palette */
1730 reset_palette(vc);
1731 vc->vc_state = ESnormal;
1732 } else
1733 vc->vc_state = ESnormal;
1734 return;
1735 case ESpalette:
1736 if ( (c>='0'&&c<='9') || (c>='A'&&c<='F') || (c>='a'&&c<='f') ) {
1737 vc->vc_par[vc->vc_npar++] = (c > '9' ? (c & 0xDF) - 'A' + 10 : c - '0');
1738 if (vc->vc_npar == 7) {
1739 int i = vc->vc_par[0] * 3, j = 1;
1740 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1741 vc->vc_palette[i++] += vc->vc_par[j++];
1742 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1743 vc->vc_palette[i++] += vc->vc_par[j++];
1744 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1745 vc->vc_palette[i] += vc->vc_par[j];
1746 set_palette(vc);
1747 vc->vc_state = ESnormal;
1748 }
1749 } else
1750 vc->vc_state = ESnormal;
1751 return;
1752 case ESsquare:
1753 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1754 vc->vc_par[vc->vc_npar] = 0;
1755 vc->vc_npar = 0;
1756 vc->vc_state = ESgetpars;
1757 if (c == '[') { /* Function key */
1758 vc->vc_state=ESfunckey;
1759 return;
1760 }
1761 vc->vc_ques = (c == '?');
1762 if (vc->vc_ques)
1763 return;
1764 case ESgetpars:
1765 if (c == ';' && vc->vc_npar < NPAR - 1) {
1766 vc->vc_npar++;
1767 return;
1768 } else if (c>='0' && c<='9') {
1769 vc->vc_par[vc->vc_npar] *= 10;
1770 vc->vc_par[vc->vc_npar] += c - '0';
1771 return;
1772 } else
1773 vc->vc_state = ESgotpars;
1774 case ESgotpars:
1775 vc->vc_state = ESnormal;
1776 switch(c) {
1777 case 'h':
1778 set_mode(vc, 1);
1779 return;
1780 case 'l':
1781 set_mode(vc, 0);
1782 return;
1783 case 'c':
1784 if (vc->vc_ques) {
1785 if (vc->vc_par[0])
1786 vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16);
1787 else
1788 vc->vc_cursor_type = CUR_DEFAULT;
1789 return;
1790 }
1791 break;
1792 case 'm':
1793 if (vc->vc_ques) {
1794 clear_selection();
1795 if (vc->vc_par[0])
1796 vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1];
1797 else
1798 vc->vc_complement_mask = vc->vc_s_complement_mask;
1799 return;
1800 }
1801 break;
1802 case 'n':
1803 if (!vc->vc_ques) {
1804 if (vc->vc_par[0] == 5)
1805 status_report(tty);
1806 else if (vc->vc_par[0] == 6)
1807 cursor_report(vc, tty);
1808 }
1809 return;
1810 }
1811 if (vc->vc_ques) {
1812 vc->vc_ques = 0;
1813 return;
1814 }
1815 switch(c) {
1816 case 'G': case '`':
1817 if (vc->vc_par[0])
1818 vc->vc_par[0]--;
1819 gotoxy(vc, vc->vc_par[0], vc->vc_y);
1820 return;
1821 case 'A':
1822 if (!vc->vc_par[0])
1823 vc->vc_par[0]++;
1824 gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]);
1825 return;
1826 case 'B': case 'e':
1827 if (!vc->vc_par[0])
1828 vc->vc_par[0]++;
1829 gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]);
1830 return;
1831 case 'C': case 'a':
1832 if (!vc->vc_par[0])
1833 vc->vc_par[0]++;
1834 gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y);
1835 return;
1836 case 'D':
1837 if (!vc->vc_par[0])
1838 vc->vc_par[0]++;
1839 gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y);
1840 return;
1841 case 'E':
1842 if (!vc->vc_par[0])
1843 vc->vc_par[0]++;
1844 gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]);
1845 return;
1846 case 'F':
1847 if (!vc->vc_par[0])
1848 vc->vc_par[0]++;
1849 gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]);
1850 return;
1851 case 'd':
1852 if (vc->vc_par[0])
1853 vc->vc_par[0]--;
1854 gotoxay(vc, vc->vc_x ,vc->vc_par[0]);
1855 return;
1856 case 'H': case 'f':
1857 if (vc->vc_par[0])
1858 vc->vc_par[0]--;
1859 if (vc->vc_par[1])
1860 vc->vc_par[1]--;
1861 gotoxay(vc, vc->vc_par[1], vc->vc_par[0]);
1862 return;
1863 case 'J':
1864 csi_J(vc, vc->vc_par[0]);
1865 return;
1866 case 'K':
1867 csi_K(vc, vc->vc_par[0]);
1868 return;
1869 case 'L':
1870 csi_L(vc, vc->vc_par[0]);
1871 return;
1872 case 'M':
1873 csi_M(vc, vc->vc_par[0]);
1874 return;
1875 case 'P':
1876 csi_P(vc, vc->vc_par[0]);
1877 return;
1878 case 'c':
1879 if (!vc->vc_par[0])
1880 respond_ID(tty);
1881 return;
1882 case 'g':
1883 if (!vc->vc_par[0])
1884 vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31));
1885 else if (vc->vc_par[0] == 3) {
1886 vc->vc_tab_stop[0] =
1887 vc->vc_tab_stop[1] =
1888 vc->vc_tab_stop[2] =
1889 vc->vc_tab_stop[3] =
1890 vc->vc_tab_stop[4] = 0;
1891 }
1892 return;
1893 case 'm':
1894 csi_m(vc);
1895 return;
1896 case 'q': /* DECLL - but only 3 leds */
1897 /* map 0,1,2,3 to 0,1,2,4 */
1898 if (vc->vc_par[0] < 4)
1899 setledstate(kbd_table + vc->vc_num,
1900 (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4);
1901 return;
1902 case 'r':
1903 if (!vc->vc_par[0])
1904 vc->vc_par[0]++;
1905 if (!vc->vc_par[1])
1906 vc->vc_par[1] = vc->vc_rows;
1907 /* Minimum allowed region is 2 lines */
1908 if (vc->vc_par[0] < vc->vc_par[1] &&
1909 vc->vc_par[1] <= vc->vc_rows) {
1910 vc->vc_top = vc->vc_par[0] - 1;
1911 vc->vc_bottom = vc->vc_par[1];
1912 gotoxay(vc, 0, 0);
1913 }
1914 return;
1915 case 's':
1916 save_cur(vc);
1917 return;
1918 case 'u':
1919 restore_cur(vc);
1920 return;
1921 case 'X':
1922 csi_X(vc, vc->vc_par[0]);
1923 return;
1924 case '@':
1925 csi_at(vc, vc->vc_par[0]);
1926 return;
1927 case ']': /* setterm functions */
1928 setterm_command(vc);
1929 return;
1930 }
1931 return;
1932 case ESpercent:
1933 vc->vc_state = ESnormal;
1934 switch (c) {
1935 case '@': /* defined in ISO 2022 */
1936 vc->vc_utf = 0;
1937 return;
1938 case 'G': /* prelim official escape code */
1939 case '8': /* retained for compatibility */
1940 vc->vc_utf = 1;
1941 return;
1942 }
1943 return;
1944 case ESfunckey:
1945 vc->vc_state = ESnormal;
1946 return;
1947 case EShash:
1948 vc->vc_state = ESnormal;
1949 if (c == '8') {
1950 /* DEC screen alignment test. kludge :-) */
1951 vc->vc_video_erase_char =
1952 (vc->vc_video_erase_char & 0xff00) | 'E';
1953 csi_J(vc, 2);
1954 vc->vc_video_erase_char =
1955 (vc->vc_video_erase_char & 0xff00) | ' ';
1956 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
1957 }
1958 return;
1959 case ESsetG0:
1960 if (c == '0')
1961 vc->vc_G0_charset = GRAF_MAP;
1962 else if (c == 'B')
1963 vc->vc_G0_charset = LAT1_MAP;
1964 else if (c == 'U')
1965 vc->vc_G0_charset = IBMPC_MAP;
1966 else if (c == 'K')
1967 vc->vc_G0_charset = USER_MAP;
1968 if (vc->vc_charset == 0)
1969 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1970 vc->vc_state = ESnormal;
1971 return;
1972 case ESsetG1:
1973 if (c == '0')
1974 vc->vc_G1_charset = GRAF_MAP;
1975 else if (c == 'B')
1976 vc->vc_G1_charset = LAT1_MAP;
1977 else if (c == 'U')
1978 vc->vc_G1_charset = IBMPC_MAP;
1979 else if (c == 'K')
1980 vc->vc_G1_charset = USER_MAP;
1981 if (vc->vc_charset == 1)
1982 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1983 vc->vc_state = ESnormal;
1984 return;
1985 default:
1986 vc->vc_state = ESnormal;
1987 }
1988}
1989
1990/* This is a temporary buffer used to prepare a tty console write
1991 * so that we can easily avoid touching user space while holding the
1992 * console spinlock. It is allocated in con_init and is shared by
1993 * this code and the vc_screen read/write tty calls.
1994 *
1995 * We have to allocate this statically in the kernel data section
1996 * since console_init (and thus con_init) are called before any
1997 * kernel memory allocation is available.
1998 */
1999char con_buf[CON_BUF_SIZE];
c831c338 2000DEFINE_MUTEX(con_buf_mtx);
1da177e4 2001
2f1a2ccb 2002/* is_double_width() is based on the wcwidth() implementation by
1ed8a2b3 2003 * Markus Kuhn -- 2007-05-26 (Unicode 5.0)
2f1a2ccb
EK		 2004 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
2005 */
2006struct interval {
2007 uint32_t first;
2008 uint32_t last;
2009};
2010
2011static int bisearch(uint32_t ucs, const struct interval *table, int max)
2012{
2013 int min = 0;
2014 int mid;
2015
2016 if (ucs < table[0].first || ucs > table[max].last)
2017 return 0;
2018 while (max >= min) {
2019 mid = (min + max) / 2;
2020 if (ucs > table[mid].last)
2021 min = mid + 1;
2022 else if (ucs < table[mid].first)
2023 max = mid - 1;
2024 else
2025 return 1;
2026 }
2027 return 0;
2028}
2029
2030static int is_double_width(uint32_t ucs)
2031{
2032 static const struct interval double_width[] = {
2033 { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E },
2034 { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF },
1ed8a2b3
EK		 2035 { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 },
2036 { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD }
2f1a2ccb 2037 };
0f11541b 2038 return bisearch(ucs, double_width, ARRAY_SIZE(double_width) - 1);
2f1a2ccb
EK		 2039}
2040
1da177e4
LT		 2041/* acquires console_sem */
2042static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2043{
2044#ifdef VT_BUF_VRAM_ONLY
2045#define FLUSH do { } while(0);
2046#else
2047#define FLUSH if (draw_x >= 0) { \
2048 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
2049 draw_x = -1; \
2050 }
2051#endif
2052
2053 int c, tc, ok, n = 0, draw_x = -1;
2054 unsigned int currcons;
2055 unsigned long draw_from = 0, draw_to = 0;
2056 struct vc_data *vc;
2f1a2ccb 2057 unsigned char vc_attr;
0341a4d0 2058 struct vt_notifier_param param;
2f1a2ccb
EK		 2059 uint8_t rescan;
2060 uint8_t inverse;
2061 uint8_t width;
1da177e4
LT		 2062 u16 himask, charmask;
2063 const unsigned char *orig_buf = NULL;
2064 int orig_count;
2065
2066 if (in_interrupt())
2067 return count;
2068
2069 might_sleep();
2070
2071 acquire_console_sem();
2072 vc = tty->driver_data;
2073 if (vc == NULL) {
2074 printk(KERN_ERR "vt: argh, driver_data is NULL !\n");
2075 release_console_sem();
2076 return 0;
2077 }
2078
2079 currcons = vc->vc_num;
2080 if (!vc_cons_allocated(currcons)) {
2081 /* could this happen? */
2082 static int error = 0;
2083 if (!error) {
2084 error = 1;
2085 printk("con_write: tty %d not allocated\n", currcons+1);
2086 }
2087 release_console_sem();
2088 return 0;
2089 }
2090 release_console_sem();
2091
2092 orig_buf = buf;
2093 orig_count = count;
2094
2095 /* At this point 'buf' is guaranteed to be a kernel buffer
2096 * and therefore no access to userspace (and therefore sleeping)
c831c338 2097 * will be needed. The con_buf_mtx serializes all tty based
1da177e4
LT		 2098 * console rendering and vcs write/read operations. We hold
2099 * the console spinlock during the entire write.
2100 */
2101
2102 acquire_console_sem();
2103
2104 vc = tty->driver_data;
2105 if (vc == NULL) {
2106 printk(KERN_ERR "vt: argh, driver_data _became_ NULL !\n");
2107 release_console_sem();
2108 goto out;
2109 }
2110
2111 himask = vc->vc_hi_font_mask;
2112 charmask = himask ? 0x1ff : 0xff;
2113
2114 /* undraw cursor first */
2115 if (IS_FG(vc))
2116 hide_cursor(vc);
2117
0341a4d0
KD		 2118 param.vc = vc;
2119
1da177e4
LT		 2120 while (!tty->stopped && count) {
2121 int orig = *buf;
2122 c = orig;
2123 buf++;
2124 n++;
2125 count--;
2f1a2ccb
EK		 2126 rescan = 0;
2127 inverse = 0;
2128 width = 1;
1da177e4
LT		 2129
2130 /* Do no translation at all in control states */
2131 if (vc->vc_state != ESnormal) {
2132 tc = c;
d4328b40 2133 } else if (vc->vc_utf && !vc->vc_disp_ctrl) {
2f1a2ccb
EK		 2134 /* Combine UTF-8 into Unicode in vc_utf_char.
2135 * vc_utf_count is the number of continuation bytes still
2136 * expected to arrive.
2137 * vc_npar is the number of continuation bytes arrived so
2138 * far
2139 */
d4328b40 2140rescan_last_byte:
2f1a2ccb
EK		 2141 if ((c & 0xc0) == 0x80) {
2142 /* Continuation byte received */
2143 static const uint32_t utf8_length_changes[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff };
d4328b40 2144 if (vc->vc_utf_count) {
2f1a2ccb
EK		 2145 vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f);
2146 vc->vc_npar++;
2147 if (--vc->vc_utf_count) {
2148 /* Still need some bytes */
1da177e4 2149 continue;
2f1a2ccb
EK		 2150 }
2151 /* Got a whole character */
2152 c = vc->vc_utf_char;
2153 /* Reject overlong sequences */
2154 if (c <= utf8_length_changes[vc->vc_npar - 1] ||
2155 c > utf8_length_changes[vc->vc_npar])
2156 c = 0xfffd;
2157 } else {
2158 /* Unexpected continuation byte */
2159 vc->vc_utf_count = 0;
2160 c = 0xfffd;
2161 }
1da177e4 2162 } else {
2f1a2ccb
EK		 2163 /* Single ASCII byte or first byte of a sequence received */
2164 if (vc->vc_utf_count) {
2165 /* Continuation byte expected */
2166 rescan = 1;
2167 vc->vc_utf_count = 0;
2168 c = 0xfffd;
2169 } else if (c > 0x7f) {
2170 /* First byte of a multibyte sequence received */
2171 vc->vc_npar = 0;
2172 if ((c & 0xe0) == 0xc0) {
2173 vc->vc_utf_count = 1;
2174 vc->vc_utf_char = (c & 0x1f);
2175 } else if ((c & 0xf0) == 0xe0) {
2176 vc->vc_utf_count = 2;
2177 vc->vc_utf_char = (c & 0x0f);
2178 } else if ((c & 0xf8) == 0xf0) {
2179 vc->vc_utf_count = 3;
2180 vc->vc_utf_char = (c & 0x07);
2181 } else if ((c & 0xfc) == 0xf8) {
2182 vc->vc_utf_count = 4;
2183 vc->vc_utf_char = (c & 0x03);
2184 } else if ((c & 0xfe) == 0xfc) {
2185 vc->vc_utf_count = 5;
2186 vc->vc_utf_char = (c & 0x01);
2187 } else {
2188 /* 254 and 255 are invalid */
2189 c = 0xfffd;
2190 }
2191 if (vc->vc_utf_count) {
2192 /* Still need some bytes */
2193 continue;
2194 }
2195 }
2196 /* Nothing to do if an ASCII byte was received */
1da177e4 2197 }
2f1a2ccb
EK		 2198 /* End of UTF-8 decoding. */
2199 /* c is the received character, or U+FFFD for invalid sequences. */
2200 /* Replace invalid Unicode code points with U+FFFD too */
2201 if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff)
2202 c = 0xfffd;
2203 tc = c;
d4328b40 2204 } else { /* no utf or alternate charset mode */
2f1a2ccb 2205 tc = vc->vc_translate[vc->vc_toggle_meta ? (c | 0x80) : c];
1da177e4
LT		 2206 }
2207
0341a4d0
KD		 2208 param.c = tc;
2209 if (atomic_notifier_call_chain(&vt_notifier_list, VT_PREWRITE,
2210 &param) == NOTIFY_STOP)
2211 continue;
2212
1da177e4
LT		 2213 /* If the original code was a control character we
2214 * only allow a glyph to be displayed if the code is
2215 * not normally used (such as for cursor movement) or
2216 * if the disp_ctrl mode has been explicitly enabled.
2217 * Certain characters (as given by the CTRL_ALWAYS
2218 * bitmap) are always displayed as control characters,
2219 * as the console would be pretty useless without
2220 * them; to display an arbitrary font position use the
2221 * direct-to-font zone in UTF-8 mode.
2222 */
2223 ok = tc && (c >= 32 ||
d4328b40
AT		 2224 !(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 :
2225 vc->vc_utf || ((CTRL_ACTION >> c) & 1)))
1da177e4
LT		 2226 && (c != 127 || vc->vc_disp_ctrl)
2227 && (c != 128+27);
2228
2229 if (vc->vc_state == ESnormal && ok) {
2f1a2ccb
EK		 2230 if (vc->vc_utf && !vc->vc_disp_ctrl) {
2231 if (is_double_width(c))
2232 width = 2;
2233 }
1da177e4
LT		 2234 /* Now try to find out how to display it */
2235 tc = conv_uni_to_pc(vc, tc);
d4328b40 2236 if (tc & ~charmask) {
2f1a2ccb
EK		 2237 if (tc == -1 || tc == -2) {
2238 continue; /* nothing to display */
2239 }
2240 /* Glyph not found */
1ed8a2b3 2241 if ((!(vc->vc_utf && !vc->vc_disp_ctrl) || c < 128) && !(c & ~charmask)) {
2f1a2ccb 2242 /* In legacy mode use the glyph we get by a 1:1 mapping.
1ed8a2b3
EK		 2243 This would make absolutely no sense with Unicode in mind,
2244 but do this for ASCII characters since a font may lack
2245 Unicode mapping info and we don't want to end up with
2246 having question marks only. */
2f1a2ccb
EK		 2247 tc = c;
2248 } else {
2249 /* Display U+FFFD. If it's not found, display an inverse question mark. */
2250 tc = conv_uni_to_pc(vc, 0xfffd);
2251 if (tc < 0) {
2252 inverse = 1;
2253 tc = conv_uni_to_pc(vc, '?');
2254 if (tc < 0) tc = '?';
2255 }
2256 }
d4328b40 2257 }
1da177e4 2258
2f1a2ccb
EK		 2259 if (!inverse) {
2260 vc_attr = vc->vc_attr;
1da177e4 2261 } else {
2f1a2ccb
EK		 2262 /* invert vc_attr */
2263 if (!vc->vc_can_do_color) {
2264 vc_attr = (vc->vc_attr) ^ 0x08;
2265 } else if (vc->vc_hi_font_mask == 0x100) {
2266 vc_attr = ((vc->vc_attr) & 0x11) | (((vc->vc_attr) & 0xe0) >> 4) | (((vc->vc_attr) & 0x0e) << 4);
2267 } else {
2268 vc_attr = ((vc->vc_attr) & 0x88) | (((vc->vc_attr) & 0x70) >> 4) | (((vc->vc_attr) & 0x07) << 4);
2269 }
1ed8a2b3 2270 FLUSH
1da177e4 2271 }
2f1a2ccb
EK		 2272
2273 while (1) {
2274 if (vc->vc_need_wrap || vc->vc_decim)
2275 FLUSH
2276 if (vc->vc_need_wrap) {
2277 cr(vc);
2278 lf(vc);
2279 }
2280 if (vc->vc_decim)
2281 insert_char(vc, 1);
2282 scr_writew(himask ?
2283 ((vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) :
2284 (vc_attr << 8) + tc,
2285 (u16 *) vc->vc_pos);
2286 if (DO_UPDATE(vc) && draw_x < 0) {
2287 draw_x = vc->vc_x;
2288 draw_from = vc->vc_pos;
2289 }
2290 if (vc->vc_x == vc->vc_cols - 1) {
2291 vc->vc_need_wrap = vc->vc_decawm;
2292 draw_to = vc->vc_pos + 2;
2293 } else {
2294 vc->vc_x++;
2295 draw_to = (vc->vc_pos += 2);
d4328b40 2296 }
2f1a2ccb
EK		 2297
2298 if (!--width) break;
2299
2300 tc = conv_uni_to_pc(vc, ' '); /* A space is printed in the second column */
2301 if (tc < 0) tc = ' ';
2302 }
b293d758 2303 notify_write(vc, c);
2f1a2ccb 2304
1ed8a2b3
EK		 2305 if (inverse) {
2306 FLUSH
2307 }
2308
2f1a2ccb
EK		 2309 if (rescan) {
2310 rescan = 0;
2311 inverse = 0;
2312 width = 1;
d4328b40
AT		 2313 c = orig;
2314 goto rescan_last_byte;
2315 }
1da177e4
LT		 2316 continue;
2317 }
2318 FLUSH
2319 do_con_trol(tty, vc, orig);
2320 }
2321 FLUSH
2322 console_conditional_schedule();
2323 release_console_sem();
2324
2325out:
b293d758 2326 notify_update(vc);
1da177e4
LT		 2327 return n;
2328#undef FLUSH
2329}
2330
2331/*
2332 * This is the console switching callback.
2333 *
2334 * Doing console switching in a process context allows
2335 * us to do the switches asynchronously (needed when we want
2336 * to switch due to a keyboard interrupt). Synchronization
2337 * with other console code and prevention of re-entrancy is
2338 * ensured with console_sem.
2339 */
65f27f38 2340static void console_callback(struct work_struct *ignored)
1da177e4
LT		 2341{
2342 acquire_console_sem();
2343
2344 if (want_console >= 0) {
2345 if (want_console != fg_console &&
2346 vc_cons_allocated(want_console)) {
2347 hide_cursor(vc_cons[fg_console].d);
2348 change_console(vc_cons[want_console].d);
2349 /* we only changed when the console had already
2350 been allocated - a new console is not created
2351 in an interrupt routine */
2352 }
2353 want_console = -1;
2354 }
2355 if (do_poke_blanked_console) { /* do not unblank for a LED change */
2356 do_poke_blanked_console = 0;
2357 poke_blanked_console();
2358 }
2359 if (scrollback_delta) {
2360 struct vc_data *vc = vc_cons[fg_console].d;
2361 clear_selection();
2362 if (vc->vc_mode == KD_TEXT)
2363 vc->vc_sw->con_scrolldelta(vc, scrollback_delta);
2364 scrollback_delta = 0;
2365 }
2366 if (blank_timer_expired) {
2367 do_blank_screen(0);
2368 blank_timer_expired = 0;
2369 }
b293d758 2370 notify_update(vc_cons[fg_console].d);
1da177e4
LT		 2371
2372 release_console_sem();
2373}
2374
b257bc05 2375int set_console(int nr)
1da177e4 2376{
b257bc05
AJ		 2377 struct vc_data *vc = vc_cons[fg_console].d;
2378
2379 if (!vc_cons_allocated(nr) || vt_dont_switch ||
2380 (vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) {
2381
2382 /*
2383 * Console switch will fail in console_callback() or
2384 * change_console() so there is no point scheduling
2385 * the callback
2386 *
2387 * Existing set_console() users don't check the return
2388 * value so this shouldn't break anything
2389 */
2390 return -EINVAL;
2391 }
2392
1da177e4
LT		 2393 want_console = nr;
2394 schedule_console_callback();
b257bc05
AJ		 2395
2396 return 0;
1da177e4
LT		 2397}
2398
2399struct tty_driver *console_driver;
2400
2401#ifdef CONFIG_VT_CONSOLE
2402
2403/*
2404 * Console on virtual terminal
2405 *
2406 * The console must be locked when we get here.
2407 */
2408
2409static void vt_console_print(struct console *co, const char *b, unsigned count)
2410{
2411 struct vc_data *vc = vc_cons[fg_console].d;
2412 unsigned char c;
b0940003 2413 static DEFINE_SPINLOCK(printing_lock);
1da177e4
LT		 2414 const ushort *start;
2415 ushort cnt = 0;
2416 ushort myx;
2417
2418 /* console busy or not yet initialized */
b0940003
NP		 2419 if (!printable)
2420 return;
2421 if (!spin_trylock(&printing_lock))
1da177e4
LT		 2422 return;
2423
2424 if (kmsg_redirect && vc_cons_allocated(kmsg_redirect - 1))
2425 vc = vc_cons[kmsg_redirect - 1].d;
2426
2427 /* read `x' only after setting currcons properly (otherwise
2428 the `x' macro will read the x of the foreground console). */
2429 myx = vc->vc_x;
2430
2431 if (!vc_cons_allocated(fg_console)) {
2432 /* impossible */
2433 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2434 goto quit;
2435 }
2436
2437 if (vc->vc_mode != KD_TEXT)
2438 goto quit;
2439
2440 /* undraw cursor first */
2441 if (IS_FG(vc))
2442 hide_cursor(vc);
2443
2444 start = (ushort *)vc->vc_pos;
2445
2446 /* Contrived structure to try to emulate original need_wrap behaviour
2447 * Problems caused when we have need_wrap set on '\n' character */
2448 while (count--) {
2449 c = *b++;
2450 if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) {
2451 if (cnt > 0) {
2452 if (CON_IS_VISIBLE(vc))
2453 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2454 vc->vc_x += cnt;
2455 if (vc->vc_need_wrap)
2456 vc->vc_x--;
2457 cnt = 0;
2458 }
2459 if (c == 8) { /* backspace */
2460 bs(vc);
2461 start = (ushort *)vc->vc_pos;
2462 myx = vc->vc_x;
2463 continue;
2464 }
2465 if (c != 13)
2466 lf(vc);
2467 cr(vc);
2468 start = (ushort *)vc->vc_pos;
2469 myx = vc->vc_x;
2470 if (c == 10 || c == 13)
2471 continue;
2472 }
2473 scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos);
b293d758 2474 notify_write(vc, c);
1da177e4
LT		 2475 cnt++;
2476 if (myx == vc->vc_cols - 1) {
2477 vc->vc_need_wrap = 1;
2478 continue;
2479 }
2480 vc->vc_pos += 2;
2481 myx++;
2482 }
2483 if (cnt > 0) {
2484 if (CON_IS_VISIBLE(vc))
2485 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2486 vc->vc_x += cnt;
2487 if (vc->vc_x == vc->vc_cols) {
2488 vc->vc_x--;
2489 vc->vc_need_wrap = 1;
2490 }
2491 }
2492 set_cursor(vc);
b293d758 2493 notify_update(vc);
1da177e4
LT		 2494
2495quit:
b0940003 2496 spin_unlock(&printing_lock);
1da177e4
LT		 2497}
2498
2499static struct tty_driver *vt_console_device(struct console *c, int *index)
2500{
2501 *index = c->index ? c->index-1 : fg_console;
2502 return console_driver;
2503}
2504
2505static struct console vt_console_driver = {
2506 .name = "tty",
2507 .write = vt_console_print,
2508 .device = vt_console_device,
2509 .unblank = unblank_screen,
2510 .flags = CON_PRINTBUFFER,
2511 .index = -1,
2512};
2513#endif
2514
2515/*
2516 * Handling of Linux-specific VC ioctls
2517 */
2518
2519/*
2520 * Generally a bit racy with respect to console_sem().
2521 *
2522 * There are some functions which don't need it.
2523 *
2524 * There are some functions which can sleep for arbitrary periods
2525 * (paste_selection) but we don't need the lock there anyway.
2526 *
2527 * set_selection has locking, and definitely needs it
2528 */
2529
2530int tioclinux(struct tty_struct *tty, unsigned long arg)
2531{
2532 char type, data;
2533 char __user *p = (char __user *)arg;
2534 int lines;
2535 int ret;
2536
2537 if (tty->driver->type != TTY_DRIVER_TYPE_CONSOLE)
2538 return -EINVAL;
2539 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN))
2540 return -EPERM;
2541 if (get_user(type, p))
2542 return -EFAULT;
2543 ret = 0;
2544 switch (type)
2545 {
2546 case TIOCL_SETSEL:
2547 acquire_console_sem();
2548 ret = set_selection((struct tiocl_selection __user *)(p+1), tty);
2549 release_console_sem();
2550 break;
2551 case TIOCL_PASTESEL:
2552 ret = paste_selection(tty);
2553 break;
2554 case TIOCL_UNBLANKSCREEN:
2d237c63 2555 acquire_console_sem();
1da177e4 2556 unblank_screen();
2d237c63 2557 release_console_sem();
1da177e4
LT		 2558 break;
2559 case TIOCL_SELLOADLUT:
2560 ret = sel_loadlut(p);
2561 break;
2562 case TIOCL_GETSHIFTSTATE:
2563
2564 /*
2565 * Make it possible to react to Shift+Mousebutton.
2566 * Note that 'shift_state' is an undocumented
2567 * kernel-internal variable; programs not closely
2568 * related to the kernel should not use this.
2569 */
2570 data = shift_state;
2571 ret = __put_user(data, p);
2572 break;
2573 case TIOCL_GETMOUSEREPORTING:
2574 data = mouse_reporting();
2575 ret = __put_user(data, p);
2576 break;
2577 case TIOCL_SETVESABLANK:
403aac96 2578 ret = set_vesa_blanking(p);
1da177e4 2579 break;
0ca07731
RW		 2580 case TIOCL_GETKMSGREDIRECT:
2581 data = kmsg_redirect;
2582 ret = __put_user(data, p);
2583 break;
1da177e4
LT		 2584 case TIOCL_SETKMSGREDIRECT:
2585 if (!capable(CAP_SYS_ADMIN)) {
2586 ret = -EPERM;
2587 } else {
2588 if (get_user(data, p+1))
2589 ret = -EFAULT;
2590 else
2591 kmsg_redirect = data;
2592 }
2593 break;
2594 case TIOCL_GETFGCONSOLE:
2595 ret = fg_console;
2596 break;
2597 case TIOCL_SCROLLCONSOLE:
2598 if (get_user(lines, (s32 __user *)(p+4))) {
2599 ret = -EFAULT;
2600 } else {
2601 scrollfront(vc_cons[fg_console].d, lines);
2602 ret = 0;
2603 }
2604 break;
2605 case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
2d237c63 2606 acquire_console_sem();
1da177e4
LT		 2607 ignore_poke = 1;
2608 do_blank_screen(0);
2d237c63 2609 release_console_sem();
1da177e4
LT		 2610 break;
2611 case TIOCL_BLANKEDSCREEN:
2612 ret = console_blanked;
2613 break;
2614 default:
2615 ret = -EINVAL;
2616 break;
2617 }
2618 return ret;
2619}
2620
2621/*
2622 * /dev/ttyN handling
2623 */
2624
2625static int con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2626{
2627 int retval;
2628
2629 retval = do_con_write(tty, buf, count);
2630 con_flush_chars(tty);
2631
2632 return retval;
2633}
2634
2635static void con_put_char(struct tty_struct *tty, unsigned char ch)
2636{
2637 if (in_interrupt())
2638 return; /* n_r3964 calls put_char() from interrupt context */
2639 do_con_write(tty, &ch, 1);
2640}
2641
2642static int con_write_room(struct tty_struct *tty)
2643{
2644 if (tty->stopped)
2645 return 0;
2646 return 4096; /* No limit, really; we're not buffering */
2647}
2648
2649static int con_chars_in_buffer(struct tty_struct *tty)
2650{
2651 return 0; /* we're not buffering */
2652}
2653
2654/*
2655 * con_throttle and con_unthrottle are only used for
2656 * paste_selection(), which has to stuff in a large number of
2657 * characters...
2658 */
2659static void con_throttle(struct tty_struct *tty)
2660{
2661}
2662
2663static void con_unthrottle(struct tty_struct *tty)
2664{
2665 struct vc_data *vc = tty->driver_data;
2666
2667 wake_up_interruptible(&vc->paste_wait);
2668}
2669
2670/*
2671 * Turn the Scroll-Lock LED on when the tty is stopped
2672 */
2673static void con_stop(struct tty_struct *tty)
2674{
2675 int console_num;
2676 if (!tty)
2677 return;
2678 console_num = tty->index;
2679 if (!vc_cons_allocated(console_num))
2680 return;
2681 set_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2682 set_leds();
2683}
2684
2685/*
2686 * Turn the Scroll-Lock LED off when the console is started
2687 */
2688static void con_start(struct tty_struct *tty)
2689{
2690 int console_num;
2691 if (!tty)
2692 return;
2693 console_num = tty->index;
2694 if (!vc_cons_allocated(console_num))
2695 return;
2696 clr_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2697 set_leds();
2698}
2699
2700static void con_flush_chars(struct tty_struct *tty)
2701{
2702 struct vc_data *vc;
2703
2704 if (in_interrupt()) /* from flush_to_ldisc */
2705 return;
2706
2707 /* if we race with con_close(), vt may be null */
2708 acquire_console_sem();
2709 vc = tty->driver_data;
2710 if (vc)
2711 set_cursor(vc);
2712 release_console_sem();
2713}
2714
2715/*
2716 * Allocate the console screen memory.
2717 */
2718static int con_open(struct tty_struct *tty, struct file *filp)
2719{
2720 unsigned int currcons = tty->index;
2721 int ret = 0;
2722
2723 acquire_console_sem();
f786648b 2724 if (tty->driver_data == NULL) {
1da177e4
LT		 2725 ret = vc_allocate(currcons);
2726 if (ret == 0) {
2727 struct vc_data *vc = vc_cons[currcons].d;
2728 tty->driver_data = vc;
2729 vc->vc_tty = tty;
2730
2731 if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
2732 tty->winsize.ws_row = vc_cons[currcons].d->vc_rows;
2733 tty->winsize.ws_col = vc_cons[currcons].d->vc_cols;
2734 }
2735 release_console_sem();
d09d7ddf 2736 vcs_make_sysfs(tty);
1da177e4
LT		 2737 return ret;
2738 }
2739 }
2740 release_console_sem();
2741 return ret;
2742}
2743
2744/*
70522e12 2745 * We take tty_mutex in here to prevent another thread from coming in via init_dev
1da177e4
LT		 2746 * and taking a ref against the tty while we're in the process of forgetting
2747 * about it and cleaning things up.
2748 *
d09d7ddf 2749 * This is because vcs_remove_sysfs() can sleep and will drop the BKL.
1da177e4
LT		 2750 */
2751static void con_close(struct tty_struct *tty, struct file *filp)
2752{
70522e12 2753 mutex_lock(&tty_mutex);
1da177e4
LT		 2754 acquire_console_sem();
2755 if (tty && tty->count == 1) {
2756 struct vc_data *vc = tty->driver_data;
2757
2758 if (vc)
2759 vc->vc_tty = NULL;
2760 tty->driver_data = NULL;
2761 release_console_sem();
d09d7ddf 2762 vcs_remove_sysfs(tty);
70522e12 2763 mutex_unlock(&tty_mutex);
1da177e4 2764 /*
70522e12 2765 * tty_mutex is released, but we still hold BKL, so there is
1da177e4
LT		 2766 * still exclusion against init_dev()
2767 */
2768 return;
2769 }
2770 release_console_sem();
70522e12 2771 mutex_unlock(&tty_mutex);
1da177e4
LT		 2772}
2773
fa6ce9ab
JE		 2774static int default_italic_color = 2; // green (ASCII)
2775static int default_underline_color = 3; // cyan (ASCII)
2776module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR);
2777module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR);
2778
1da177e4
LT		 2779static void vc_init(struct vc_data *vc, unsigned int rows,
2780 unsigned int cols, int do_clear)
2781{
2782 int j, k ;
2783
2784 vc->vc_cols = cols;
2785 vc->vc_rows = rows;
2786 vc->vc_size_row = cols << 1;
2787 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
2788
2789 set_origin(vc);
2790 vc->vc_pos = vc->vc_origin;
2791 reset_vc(vc);
2792 for (j=k=0; j<16; j++) {
2793 vc->vc_palette[k++] = default_red[j] ;
2794 vc->vc_palette[k++] = default_grn[j] ;
2795 vc->vc_palette[k++] = default_blu[j] ;
2796 }
2797 vc->vc_def_color = 0x07; /* white */
fa6ce9ab
JE		 2798 vc->vc_ulcolor = default_underline_color;
2799 vc->vc_itcolor = default_italic_color;
1da177e4
LT		 2800 vc->vc_halfcolor = 0x08; /* grey */
2801 init_waitqueue_head(&vc->paste_wait);
2802 reset_terminal(vc, do_clear);
2803}
2804
2805/*
2806 * This routine initializes console interrupts, and does nothing
2807 * else. If you want the screen to clear, call tty_write with
2808 * the appropriate escape-sequence.
2809 */
2810
2811static int __init con_init(void)
2812{
2813 const char *display_desc = NULL;
2814 struct vc_data *vc;
3e795de7 2815 unsigned int currcons = 0, i;
1da177e4
LT		 2816
2817 acquire_console_sem();
2818
2819 if (conswitchp)
2820 display_desc = conswitchp->con_startup();
2821 if (!display_desc) {
2822 fg_console = 0;
2823 release_console_sem();
2824 return 0;
2825 }
2826
3e795de7
AD		 2827 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2828 struct con_driver *con_driver = &registered_con_driver[i];
2829
2830 if (con_driver->con == NULL) {
2831 con_driver->con = conswitchp;
2832 con_driver->desc = display_desc;
2833 con_driver->flag = CON_DRIVER_FLAG_INIT;
2834 con_driver->first = 0;
2835 con_driver->last = MAX_NR_CONSOLES - 1;
2836 break;
2837 }
2838 }
2839
2840 for (i = 0; i < MAX_NR_CONSOLES; i++)
2841 con_driver_map[i] = conswitchp;
2842
1da177e4
LT		 2843 if (blankinterval) {
2844 blank_state = blank_normal_wait;
2845 mod_timer(&console_timer, jiffies + blankinterval);
2846 }
2847
2848 /*
2849 * kmalloc is not running yet - we use the bootmem allocator.
2850 */
2851 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) {
2852 vc_cons[currcons].d = vc = alloc_bootmem(sizeof(struct vc_data));
7f1f86a0 2853 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
1da177e4
LT		 2854 visual_init(vc, currcons, 1);
2855 vc->vc_screenbuf = (unsigned short *)alloc_bootmem(vc->vc_screenbuf_size);
2856 vc->vc_kmalloced = 0;
2857 vc_init(vc, vc->vc_rows, vc->vc_cols,
2858 currcons || !vc->vc_sw->con_save_screen);
2859 }
2860 currcons = fg_console = 0;
2861 master_display_fg = vc = vc_cons[currcons].d;
2862 set_origin(vc);
2863 save_screen(vc);
2864 gotoxy(vc, vc->vc_x, vc->vc_y);
2865 csi_J(vc, 0);
2866 update_screen(vc);
2867 printk("Console: %s %s %dx%d",
2868 vc->vc_can_do_color ? "colour" : "mono",
2869 display_desc, vc->vc_cols, vc->vc_rows);
2870 printable = 1;
2871 printk("\n");
2872
2873 release_console_sem();
2874
2875#ifdef CONFIG_VT_CONSOLE
2876 register_console(&vt_console_driver);
2877#endif
2878 return 0;
2879}
2880console_initcall(con_init);
2881
b68e31d0 2882static const struct tty_operations con_ops = {
1da177e4
LT		 2883 .open = con_open,
2884 .close = con_close,
2885 .write = con_write,
2886 .write_room = con_write_room,
2887 .put_char = con_put_char,
2888 .flush_chars = con_flush_chars,
2889 .chars_in_buffer = con_chars_in_buffer,
2890 .ioctl = vt_ioctl,
2891 .stop = con_stop,
2892 .start = con_start,
2893 .throttle = con_throttle,
2894 .unthrottle = con_unthrottle,
2895};
2896
2897int __init vty_init(void)
2898{
2899 vcs_init();
2900
2901 console_driver = alloc_tty_driver(MAX_NR_CONSOLES);
2902 if (!console_driver)
2903 panic("Couldn't allocate console driver\n");
2904 console_driver->owner = THIS_MODULE;
1da177e4
LT		 2905 console_driver->name = "tty";
2906 console_driver->name_base = 1;
2907 console_driver->major = TTY_MAJOR;
2908 console_driver->minor_start = 1;
2909 console_driver->type = TTY_DRIVER_TYPE_CONSOLE;
2910 console_driver->init_termios = tty_std_termios;
2911 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS;
2912 tty_set_operations(console_driver, &con_ops);
2913 if (tty_register_driver(console_driver))
2914 panic("Couldn't register console driver\n");
2915
2916 kbd_init();
2917 console_map_init();
2918#ifdef CONFIG_PROM_CONSOLE
2919 prom_con_init();
2920#endif
2921#ifdef CONFIG_MDA_CONSOLE
2922 mda_console_init();
2923#endif
2924 return 0;
2925}
2926
2927#ifndef VT_SINGLE_DRIVER
6db4063c
AD		 2928#include <linux/device.h>
2929
2930static struct class *vtconsole_class;
2931
b7269dd2
JB		 2932static int bind_con_driver(const struct consw *csw, int first, int last,
2933 int deflt)
1da177e4 2934{
3e795de7
AD		 2935 struct module *owner = csw->owner;
2936 const char *desc = NULL;
2937 struct con_driver *con_driver;
2938 int i, j = -1, k = -1, retval = -ENODEV;
1da177e4 2939
1da177e4
LT		 2940 if (!try_module_get(owner))
2941 return -ENODEV;
2942
1c8ce271 2943 acquire_console_sem();
1c8ce271 2944
3e795de7
AD		 2945 /* check if driver is registered */
2946 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2947 con_driver = &registered_con_driver[i];
2948
2949 if (con_driver->con == csw) {
2950 desc = con_driver->desc;
2951 retval = 0;
2952 break;
2953 }
2954 }
2955
2956 if (retval)
2957 goto err;
2958
2959 if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) {
2960 csw->con_startup();
2961 con_driver->flag |= CON_DRIVER_FLAG_INIT;
1da177e4 2962 }
1c8ce271 2963
1da177e4
LT		 2964 if (deflt) {
2965 if (conswitchp)
2966 module_put(conswitchp->owner);
1c8ce271 2967
1da177e4
LT		 2968 __module_get(owner);
2969 conswitchp = csw;
2970 }
2971
3e795de7
AD		 2972 first = max(first, con_driver->first);
2973 last = min(last, con_driver->last);
2974
1da177e4
LT		 2975 for (i = first; i <= last; i++) {
2976 int old_was_color;
2977 struct vc_data *vc = vc_cons[i].d;
2978
2979 if (con_driver_map[i])
2980 module_put(con_driver_map[i]->owner);
2981 __module_get(owner);
2982 con_driver_map[i] = csw;
2983
2984 if (!vc || !vc->vc_sw)
2985 continue;
2986
2987 j = i;
1c8ce271 2988
4ee1acce
DH		 2989 if (CON_IS_VISIBLE(vc)) {
2990 k = i;
1da177e4 2991 save_screen(vc);
4ee1acce
DH		 2992 }
2993
1da177e4
LT		 2994 old_was_color = vc->vc_can_do_color;
2995 vc->vc_sw->con_deinit(vc);
2996 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
1da177e4 2997 visual_init(vc, i, 0);
1c8ce271 2998 set_origin(vc);
1da177e4
LT		 2999 update_attr(vc);
3000
3001 /* If the console changed between mono <-> color, then
3002 * the attributes in the screenbuf will be wrong. The
3003 * following resets all attributes to something sane.
3004 */
3005 if (old_was_color != vc->vc_can_do_color)
3006 clear_buffer_attributes(vc);
1da177e4 3007 }
4ee1acce 3008
1da177e4
LT		 3009 printk("Console: switching ");
3010 if (!deflt)
3011 printk("consoles %d-%d ", first+1, last+1);
4ee1acce
DH		 3012 if (j >= 0) {
3013 struct vc_data *vc = vc_cons[j].d;
3014
1da177e4 3015 printk("to %s %s %dx%d\n",
4ee1acce
DH		 3016 vc->vc_can_do_color ? "colour" : "mono",
3017 desc, vc->vc_cols, vc->vc_rows);
3018
3019 if (k >= 0) {
3020 vc = vc_cons[k].d;
3021 update_screen(vc);
3022 }
3023 } else
1da177e4
LT		 3024 printk("to %s\n", desc);
3025
3e795de7
AD		 3026 retval = 0;
3027err:
1da177e4 3028 release_console_sem();
1da177e4 3029 module_put(owner);
3e795de7
AD		 3030 return retval;
3031};
1da177e4 3032
13ae6645
AD		 3033#ifdef CONFIG_VT_HW_CONSOLE_BINDING
3034static int con_is_graphics(const struct consw *csw, int first, int last)
3035{
3036 int i, retval = 0;
3037
3038 for (i = first; i <= last; i++) {
3039 struct vc_data *vc = vc_cons[i].d;
3040
3041 if (vc && vc->vc_mode == KD_GRAPHICS) {
3042 retval = 1;
3043 break;
3044 }
3045 }
3046
3047 return retval;
3048}
3049
b7269dd2
JB		 3050/**
3051 * unbind_con_driver - unbind a console driver
3052 * @csw: pointer to console driver to unregister
3053 * @first: first in range of consoles that @csw should be unbound from
3054 * @last: last in range of consoles that @csw should be unbound from
3055 * @deflt: should next bound console driver be default after @csw is unbound?
3056 *
3057 * To unbind a driver from all possible consoles, pass 0 as @first and
3058 * %MAX_NR_CONSOLES as @last.
3059 *
3060 * @deflt controls whether the console that ends up replacing @csw should be
3061 * the default console.
3062 *
3063 * RETURNS:
3064 * -ENODEV if @csw isn't a registered console driver or can't be unregistered
3065 * or 0 on success.
3066 */
623e71b0 3067int unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
1da177e4 3068{
3e795de7
AD		 3069 struct module *owner = csw->owner;
3070 const struct consw *defcsw = NULL;
3071 struct con_driver *con_driver = NULL, *con_back = NULL;
3072 int i, retval = -ENODEV;
1da177e4 3073
3e795de7
AD		 3074 if (!try_module_get(owner))
3075 return -ENODEV;
3076
3077 acquire_console_sem();
3078
3079 /* check if driver is registered and if it is unbindable */
3080 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3081 con_driver = &registered_con_driver[i];
3082
3083 if (con_driver->con == csw &&
6db4063c 3084 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3e795de7
AD		 3085 retval = 0;
3086 break;
3087 }
3088 }
3089
3090 if (retval) {
3091 release_console_sem();
3092 goto err;
3093 }
3094
6db4063c
AD		 3095 retval = -ENODEV;
3096
3e795de7
AD		 3097 /* check if backup driver exists */
3098 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3099 con_back = &registered_con_driver[i];
3100
3101 if (con_back->con &&
6db4063c 3102 !(con_back->flag & CON_DRIVER_FLAG_MODULE)) {
3e795de7
AD		 3103 defcsw = con_back->con;
3104 retval = 0;
3105 break;
3106 }
3107 }
3108
3109 if (retval) {
3110 release_console_sem();
3111 goto err;
3112 }
3113
3114 if (!con_is_bound(csw)) {
3115 release_console_sem();
3116 goto err;
3117 }
3118
3119 first = max(first, con_driver->first);
3120 last = min(last, con_driver->last);
3121
3122 for (i = first; i <= last; i++) {
1da177e4
LT		 3123 if (con_driver_map[i] == csw) {
3124 module_put(csw->owner);
3125 con_driver_map[i] = NULL;
3126 }
3e795de7
AD		 3127 }
3128
3129 if (!con_is_bound(defcsw)) {
6db4063c
AD		 3130 const struct consw *defconsw = conswitchp;
3131
3e795de7
AD		 3132 defcsw->con_startup();
3133 con_back->flag |= CON_DRIVER_FLAG_INIT;
6db4063c
AD		 3134 /*
3135 * vgacon may change the default driver to point
3136 * to dummycon, we restore it here...
3137 */
3138 conswitchp = defconsw;
3e795de7
AD		 3139 }
3140
3141 if (!con_is_bound(csw))
3142 con_driver->flag &= ~CON_DRIVER_FLAG_INIT;
3143
3144 release_console_sem();
6db4063c
AD		 3145 /* ignore return value, binding should not fail */
3146 bind_con_driver(defcsw, first, last, deflt);
3e795de7
AD		 3147err:
3148 module_put(owner);
3149 return retval;
3150
3151}
623e71b0 3152EXPORT_SYMBOL(unbind_con_driver);
3e795de7 3153
6db4063c
AD		 3154static int vt_bind(struct con_driver *con)
3155{
3156 const struct consw *defcsw = NULL, *csw = NULL;
3157 int i, more = 1, first = -1, last = -1, deflt = 0;
3158
3159 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3160 con_is_graphics(con->con, con->first, con->last))
3161 goto err;
3162
3163 csw = con->con;
3164
3165 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3166 struct con_driver *con = &registered_con_driver[i];
3167
3168 if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) {
3169 defcsw = con->con;
3170 break;
3171 }
3172 }
3173
3174 if (!defcsw)
3175 goto err;
3176
3177 while (more) {
3178 more = 0;
3179
3180 for (i = con->first; i <= con->last; i++) {
3181 if (con_driver_map[i] == defcsw) {
3182 if (first == -1)
3183 first = i;
3184 last = i;
3185 more = 1;
3186 } else if (first != -1)
3187 break;
3188 }
3189
3190 if (first == 0 && last == MAX_NR_CONSOLES -1)
3191 deflt = 1;
3192
3193 if (first != -1)
3194 bind_con_driver(csw, first, last, deflt);
3195
3196 first = -1;
3197 last = -1;
3198 deflt = 0;
3199 }
3200
3201err:
3202 return 0;
3203}
3204
3205static int vt_unbind(struct con_driver *con)
3206{
3207 const struct consw *csw = NULL;
3208 int i, more = 1, first = -1, last = -1, deflt = 0;
3209
3210 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3211 con_is_graphics(con->con, con->first, con->last))
3212 goto err;
3213
3214 csw = con->con;
3215
3216 while (more) {
3217 more = 0;
3218
3219 for (i = con->first; i <= con->last; i++) {
3220 if (con_driver_map[i] == csw) {
3221 if (first == -1)
3222 first = i;
3223 last = i;
3224 more = 1;
3225 } else if (first != -1)
3226 break;
3227 }
3228
3229 if (first == 0 && last == MAX_NR_CONSOLES -1)
3230 deflt = 1;
3231
3232 if (first != -1)
3233 unbind_con_driver(csw, first, last, deflt);
3234
3235 first = -1;
3236 last = -1;
3237 deflt = 0;
3238 }
3239
3240err:
3241 return 0;
3242}
13ae6645
AD		 3243#else
3244static inline int vt_bind(struct con_driver *con)
3245{
3246 return 0;
3247}
3248static inline int vt_unbind(struct con_driver *con)
3249{
3250 return 0;
3251}
3252#endif /* CONFIG_VT_HW_CONSOLE_BINDING */
6db4063c 3253
805952a8 3254static ssize_t store_bind(struct device *dev, struct device_attribute *attr,
6db4063c
AD		 3255 const char *buf, size_t count)
3256{
805952a8 3257 struct con_driver *con = dev_get_drvdata(dev);
6db4063c
AD		 3258 int bind = simple_strtoul(buf, NULL, 0);
3259
3260 if (bind)
3261 vt_bind(con);
3262 else
3263 vt_unbind(con);
3264
3265 return count;
3266}
3267
805952a8
GKH		 3268static ssize_t show_bind(struct device *dev, struct device_attribute *attr,
3269 char *buf)
6db4063c 3270{
805952a8 3271 struct con_driver *con = dev_get_drvdata(dev);
6db4063c
AD		 3272 int bind = con_is_bound(con->con);
3273
3274 return snprintf(buf, PAGE_SIZE, "%i\n", bind);
3275}
3276
805952a8
GKH		 3277static ssize_t show_name(struct device *dev, struct device_attribute *attr,
3278 char *buf)
6db4063c 3279{
805952a8 3280 struct con_driver *con = dev_get_drvdata(dev);
6db4063c
AD		 3281
3282 return snprintf(buf, PAGE_SIZE, "%s %s\n",
3283 (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)",
3284 con->desc);
3285
3286}
3287
805952a8 3288static struct device_attribute device_attrs[] = {
6db4063c
AD		 3289 __ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind),
3290 __ATTR(name, S_IRUGO, show_name, NULL),
3291};
3292
805952a8 3293static int vtconsole_init_device(struct con_driver *con)
6db4063c
AD		 3294{
3295 int i;
928e964f 3296 int error = 0;
6db4063c 3297
928e964f 3298 con->flag |= CON_DRIVER_FLAG_ATTR;
805952a8
GKH		 3299 dev_set_drvdata(con->dev, con);
3300 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3301 error = device_create_file(con->dev, &device_attrs[i]);
928e964f
AD		 3302 if (error)
3303 break;
3304 }
6db4063c 3305
928e964f
AD		 3306 if (error) {
3307 while (--i >= 0)
805952a8 3308 device_remove_file(con->dev, &device_attrs[i]);
928e964f
AD		 3309 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3310 }
3311
3312 return error;
6db4063c
AD		 3313}
3314
805952a8 3315static void vtconsole_deinit_device(struct con_driver *con)
6db4063c
AD		 3316{
3317 int i;
3318
928e964f 3319 if (con->flag & CON_DRIVER_FLAG_ATTR) {
805952a8
GKH		 3320 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3321 device_remove_file(con->dev, &device_attrs[i]);
928e964f
AD		 3322 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3323 }
6db4063c
AD		 3324}
3325
3e795de7
AD		 3326/**
3327 * con_is_bound - checks if driver is bound to the console
3328 * @csw: console driver
3329 *
3330 * RETURNS: zero if unbound, nonzero if bound
3331 *
3332 * Drivers can call this and if zero, they should release
3333 * all resources allocated on con_startup()
3334 */
3335int con_is_bound(const struct consw *csw)
3336{
3337 int i, bound = 0;
3338
3339 for (i = 0; i < MAX_NR_CONSOLES; i++) {
3340 if (con_driver_map[i] == csw) {
3341 bound = 1;
3342 break;
3343 }
3344 }
3345
3346 return bound;
3347}
3348EXPORT_SYMBOL(con_is_bound);
3349
3350/**
3351 * register_con_driver - register console driver to console layer
3352 * @csw: console driver
3353 * @first: the first console to take over, minimum value is 0
3354 * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1
3355 *
3356 * DESCRIPTION: This function registers a console driver which can later
3357 * bind to a range of consoles specified by @first and @last. It will
3358 * also initialize the console driver by calling con_startup().
3359 */
3360int register_con_driver(const struct consw *csw, int first, int last)
3361{
3362 struct module *owner = csw->owner;
3363 struct con_driver *con_driver;
3364 const char *desc;
3365 int i, retval = 0;
3366
3367 if (!try_module_get(owner))
3368 return -ENODEV;
3369
3370 acquire_console_sem();
3371
3372 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3373 con_driver = &registered_con_driver[i];
3374
3375 /* already registered */
3376 if (con_driver->con == csw)
3377 retval = -EINVAL;
3378 }
3379
3380 if (retval)
3381 goto err;
3382
3383 desc = csw->con_startup();
3384
3385 if (!desc)
3386 goto err;
3387
3388 retval = -EINVAL;
3389
3390 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3391 con_driver = &registered_con_driver[i];
3392
3393 if (con_driver->con == NULL) {
3394 con_driver->con = csw;
3395 con_driver->desc = desc;
6db4063c
AD		 3396 con_driver->node = i;
3397 con_driver->flag = CON_DRIVER_FLAG_MODULE |
3e795de7
AD		 3398 CON_DRIVER_FLAG_INIT;
3399 con_driver->first = first;
3400 con_driver->last = last;
3401 retval = 0;
3402 break;
3403 }
3404 }
3405
6db4063c
AD		 3406 if (retval)
3407 goto err;
3408
805952a8
GKH		 3409 con_driver->dev = device_create(vtconsole_class, NULL,
3410 MKDEV(0, con_driver->node),
3411 "vtcon%i", con_driver->node);
6db4063c 3412
805952a8
GKH		 3413 if (IS_ERR(con_driver->dev)) {
3414 printk(KERN_WARNING "Unable to create device for %s; "
6db4063c 3415 "errno = %ld\n", con_driver->desc,
805952a8
GKH		 3416 PTR_ERR(con_driver->dev));
3417 con_driver->dev = NULL;
6db4063c 3418 } else {
805952a8 3419 vtconsole_init_device(con_driver);
6db4063c 3420 }
928e964f 3421
3e795de7
AD		 3422err:
3423 release_console_sem();
3424 module_put(owner);
3425 return retval;
3426}
3427EXPORT_SYMBOL(register_con_driver);
3428
3429/**
3430 * unregister_con_driver - unregister console driver from console layer
3431 * @csw: console driver
3432 *
3433 * DESCRIPTION: All drivers that registers to the console layer must
3434 * call this function upon exit, or if the console driver is in a state
3435 * where it won't be able to handle console services, such as the
3436 * framebuffer console without loaded framebuffer drivers.
3437 *
3438 * The driver must unbind first prior to unregistration.
3439 */
3440int unregister_con_driver(const struct consw *csw)
3441{
3442 int i, retval = -ENODEV;
3443
3444 acquire_console_sem();
3445
3446 /* cannot unregister a bound driver */
3447 if (con_is_bound(csw))
3448 goto err;
3449
3450 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3451 struct con_driver *con_driver = &registered_con_driver[i];
3452
3453 if (con_driver->con == csw &&
6db4063c 3454 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
805952a8
GKH		 3455 vtconsole_deinit_device(con_driver);
3456 device_destroy(vtconsole_class,
3457 MKDEV(0, con_driver->node));
3e795de7
AD		 3458 con_driver->con = NULL;
3459 con_driver->desc = NULL;
805952a8 3460 con_driver->dev = NULL;
6db4063c 3461 con_driver->node = 0;
3e795de7
AD		 3462 con_driver->flag = 0;
3463 con_driver->first = 0;
3464 con_driver->last = 0;
3465 retval = 0;
3466 break;
3467 }
3468 }
3e795de7
AD		 3469err:
3470 release_console_sem();
3471 return retval;
3472}
3473EXPORT_SYMBOL(unregister_con_driver);
3474
3475/*
3476 * If we support more console drivers, this function is used
3477 * when a driver wants to take over some existing consoles
3478 * and become default driver for newly opened ones.
3479 *
3480 * take_over_console is basically a register followed by unbind
3481 */
3482int take_over_console(const struct consw *csw, int first, int last, int deflt)
3483{
3484 int err;
3485
3486 err = register_con_driver(csw, first, last);
3487
3488 if (!err)
6db4063c 3489 bind_con_driver(csw, first, last, deflt);
3e795de7
AD		 3490
3491 return err;
3492}
3493
3494/*
3495 * give_up_console is a wrapper to unregister_con_driver. It will only
3496 * work if driver is fully unbound.
3497 */
3498void give_up_console(const struct consw *csw)
3499{
3500 unregister_con_driver(csw);
3501}
3502
6db4063c 3503static int __init vtconsole_class_init(void)
3e795de7 3504{
6db4063c 3505 int i;
3e795de7 3506
6db4063c
AD		 3507 vtconsole_class = class_create(THIS_MODULE, "vtconsole");
3508 if (IS_ERR(vtconsole_class)) {
3509 printk(KERN_WARNING "Unable to create vt console class; "
3510 "errno = %ld\n", PTR_ERR(vtconsole_class));
3511 vtconsole_class = NULL;
3512 }
3e795de7 3513
6db4063c 3514 /* Add system drivers to sysfs */
3e795de7
AD		 3515 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3516 struct con_driver *con = &registered_con_driver[i];
3517
805952a8
GKH		 3518 if (con->con && !con->dev) {
3519 con->dev = device_create(vtconsole_class, NULL,
3520 MKDEV(0, con->node),
3521 "vtcon%i", con->node);
6db4063c 3522
805952a8 3523 if (IS_ERR(con->dev)) {
6db4063c 3524 printk(KERN_WARNING "Unable to create "
805952a8
GKH		 3525 "device for %s; errno = %ld\n",
3526 con->desc, PTR_ERR(con->dev));
3527 con->dev = NULL;
6db4063c 3528 } else {
805952a8 3529 vtconsole_init_device(con);
6db4063c 3530 }
3e795de7 3531 }
3e795de7
AD		 3532 }
3533
3e795de7
AD		 3534 return 0;
3535}
6db4063c 3536postcore_initcall(vtconsole_class_init);
3e795de7 3537
1da177e4
LT		 3538#endif
3539
3540/*
3541 * Screen blanking
3542 */
3543
403aac96 3544static int set_vesa_blanking(char __user *p)
1da177e4 3545{
403aac96
YY		 3546 unsigned int mode;
3547
3548 if (get_user(mode, p + 1))
3549 return -EFAULT;
3550
3551 vesa_blank_mode = (mode < 4) ? mode : 0;
3552 return 0;
1da177e4
LT		 3553}
3554
1da177e4
LT		 3555void do_blank_screen(int entering_gfx)
3556{
3557 struct vc_data *vc = vc_cons[fg_console].d;
3558 int i;
3559
3560 WARN_CONSOLE_UNLOCKED();
3561
3562 if (console_blanked) {
3563 if (blank_state == blank_vesa_wait) {
3564 blank_state = blank_off;
d060a321 3565 vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0);
1da177e4
LT		 3566 }
3567 return;
3568 }
1da177e4
LT		 3569
3570 /* entering graphics mode? */
3571 if (entering_gfx) {
3572 hide_cursor(vc);
3573 save_screen(vc);
3574 vc->vc_sw->con_blank(vc, -1, 1);
3575 console_blanked = fg_console + 1;
b6e8f00f 3576 blank_state = blank_off;
1da177e4
LT		 3577 set_origin(vc);
3578 return;
3579 }
3580
b6e8f00f 3581 if (blank_state != blank_normal_wait)
3582 return;
3583 blank_state = blank_off;
3584
1da177e4
LT		 3585 /* don't blank graphics */
3586 if (vc->vc_mode != KD_TEXT) {
3587 console_blanked = fg_console + 1;
3588 return;
3589 }
3590
3591 hide_cursor(vc);
3592 del_timer_sync(&console_timer);
3593 blank_timer_expired = 0;
3594
3595 save_screen(vc);
3596 /* In case we need to reset origin, blanking hook returns 1 */
d060a321 3597 i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0);
1da177e4
LT		 3598 console_blanked = fg_console + 1;
3599 if (i)
3600 set_origin(vc);
3601
3602 if (console_blank_hook && console_blank_hook(1))
3603 return;
3604
d060a321 3605 if (vesa_off_interval && vesa_blank_mode) {
030babac 3606 blank_state = blank_vesa_wait;
1da177e4
LT		 3607 mod_timer(&console_timer, jiffies + vesa_off_interval);
3608 }
1da177e4
LT		 3609}
3610EXPORT_SYMBOL(do_blank_screen);
3611
3612/*
3613 * Called by timer as well as from vt_console_driver
3614 */
3615void do_unblank_screen(int leaving_gfx)
3616{
3617 struct vc_data *vc;
3618
3619 /* This should now always be called from a "sane" (read: can schedule)
3620 * context for the sake of the low level drivers, except in the special
3621 * case of oops_in_progress
3622 */
3623 if (!oops_in_progress)
3624 might_sleep();
3625
3626 WARN_CONSOLE_UNLOCKED();
3627
3628 ignore_poke = 0;
3629 if (!console_blanked)
3630 return;
3631 if (!vc_cons_allocated(fg_console)) {
3632 /* impossible */
3633 printk("unblank_screen: tty %d not allocated ??\n", fg_console+1);
3634 return;
3635 }
3636 vc = vc_cons[fg_console].d;
3637 if (vc->vc_mode != KD_TEXT)
3638 return; /* but leave console_blanked != 0 */
3639
3640 if (blankinterval) {
3641 mod_timer(&console_timer, jiffies + blankinterval);
3642 blank_state = blank_normal_wait;
3643 }
3644
3645 console_blanked = 0;
3646 if (vc->vc_sw->con_blank(vc, 0, leaving_gfx))
3647 /* Low-level driver cannot restore -> do it ourselves */
3648 update_screen(vc);
3649 if (console_blank_hook)
3650 console_blank_hook(0);
3651 set_palette(vc);
3652 set_cursor(vc);
3653}
3654EXPORT_SYMBOL(do_unblank_screen);
3655
3656/*
3657 * This is called by the outside world to cause a forced unblank, mostly for
3658 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
3659 * call it with 1 as an argument and so force a mode restore... that may kill
3660 * X or at least garbage the screen but would also make the Oops visible...
3661 */
3662void unblank_screen(void)
3663{
3664 do_unblank_screen(0);
3665}
3666
3667/*
70522e12 3668 * We defer the timer blanking to work queue so it can take the console mutex
1da177e4 3669 * (console operations can still happen at irq time, but only from printk which
70522e12 3670 * has the console mutex. Not perfect yet, but better than no locking
1da177e4
LT		 3671 */
3672static void blank_screen_t(unsigned long dummy)
3673{
cc63b1e1
JB		 3674 if (unlikely(!keventd_up())) {
3675 mod_timer(&console_timer, jiffies + blankinterval);
3676 return;
3677 }
1da177e4
LT		 3678 blank_timer_expired = 1;
3679 schedule_work(&console_work);
3680}
3681
3682void poke_blanked_console(void)
3683{
3684 WARN_CONSOLE_UNLOCKED();
3685
3686 /* Add this so we quickly catch whoever might call us in a non
3687 * safe context. Nowadays, unblank_screen() isn't to be called in
3688 * atomic contexts and is allowed to schedule (with the special case
3689 * of oops_in_progress, but that isn't of any concern for this
3690 * function. --BenH.
3691 */
3692 might_sleep();
3693
3694 /* This isn't perfectly race free, but a race here would be mostly harmless,
3695 * at worse, we'll do a spurrious blank and it's unlikely
3696 */
3697 del_timer(&console_timer);
3698 blank_timer_expired = 0;
3699
3700 if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS)
3701 return;
3702 if (console_blanked)
3703 unblank_screen();
3704 else if (blankinterval) {
3705 mod_timer(&console_timer, jiffies + blankinterval);
3706 blank_state = blank_normal_wait;
3707 }
3708}
3709
3710/*
3711 * Palettes
3712 */
3713
3714static void set_palette(struct vc_data *vc)
3715{
3716 WARN_CONSOLE_UNLOCKED();
3717
3718 if (vc->vc_mode != KD_GRAPHICS)
3719 vc->vc_sw->con_set_palette(vc, color_table);
3720}
3721
3722static int set_get_cmap(unsigned char __user *arg, int set)
3723{
3724 int i, j, k;
3725
3726 WARN_CONSOLE_UNLOCKED();
3727
3728 for (i = 0; i < 16; i++)
3729 if (set) {
3730 get_user(default_red[i], arg++);
3731 get_user(default_grn[i], arg++);
3732 get_user(default_blu[i], arg++);
3733 } else {
3734 put_user(default_red[i], arg++);
3735 put_user(default_grn[i], arg++);
3736 put_user(default_blu[i], arg++);
3737 }
3738 if (set) {
3739 for (i = 0; i < MAX_NR_CONSOLES; i++)
3740 if (vc_cons_allocated(i)) {
3741 for (j = k = 0; j < 16; j++) {
3742 vc_cons[i].d->vc_palette[k++] = default_red[j];
3743 vc_cons[i].d->vc_palette[k++] = default_grn[j];
3744 vc_cons[i].d->vc_palette[k++] = default_blu[j];
3745 }
3746 set_palette(vc_cons[i].d);
3747 }
3748 }
3749 return 0;
3750}
3751
3752/*
3753 * Load palette into the DAC registers. arg points to a colour
3754 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
3755 */
3756
3757int con_set_cmap(unsigned char __user *arg)
3758{
3759 int rc;
3760
3761 acquire_console_sem();
3762 rc = set_get_cmap (arg,1);
3763 release_console_sem();
3764
3765 return rc;
3766}
3767
3768int con_get_cmap(unsigned char __user *arg)
3769{
3770 int rc;
3771
3772 acquire_console_sem();
3773 rc = set_get_cmap (arg,0);
3774 release_console_sem();
3775
3776 return rc;
3777}
3778
3779void reset_palette(struct vc_data *vc)
3780{
3781 int j, k;
3782 for (j=k=0; j<16; j++) {
3783 vc->vc_palette[k++] = default_red[j];
3784 vc->vc_palette[k++] = default_grn[j];
3785 vc->vc_palette[k++] = default_blu[j];
3786 }
3787 set_palette(vc);
3788}
3789
3790/*
3791 * Font switching
3792 *
3793 * Currently we only support fonts up to 32 pixels wide, at a maximum height
3794 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
3795 * depending on width) reserved for each character which is kinda wasty, but
3796 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
3797 * is upto the actual low-level console-driver convert data into its favorite
3798 * format (maybe we should add a `fontoffset' field to the `display'
3799 * structure so we won't have to convert the fontdata all the time.
3800 * /Jes
3801 */
3802
3803#define max_font_size 65536
3804
3805static int con_font_get(struct vc_data *vc, struct console_font_op *op)
3806{
3807 struct console_font font;
3808 int rc = -EINVAL;
3809 int c;
3810
3811 if (vc->vc_mode != KD_TEXT)
3812 return -EINVAL;
3813
3814 if (op->data) {
3815 font.data = kmalloc(max_font_size, GFP_KERNEL);
3816 if (!font.data)
3817 return -ENOMEM;
3818 } else
3819 font.data = NULL;
3820
3821 acquire_console_sem();
3822 if (vc->vc_sw->con_font_get)
3823 rc = vc->vc_sw->con_font_get(vc, &font);
3824 else
3825 rc = -ENOSYS;
3826 release_console_sem();
3827
3828 if (rc)
3829 goto out;
3830
3831 c = (font.width+7)/8 * 32 * font.charcount;
3832
3833 if (op->data && font.charcount > op->charcount)
3834 rc = -ENOSPC;
3835 if (!(op->flags & KD_FONT_FLAG_OLD)) {
3836 if (font.width > op->width || font.height > op->height)
3837 rc = -ENOSPC;
3838 } else {
3839 if (font.width != 8)
3840 rc = -EIO;
3841 else if ((op->height && font.height > op->height) ||
3842 font.height > 32)
3843 rc = -ENOSPC;
3844 }
3845 if (rc)
3846 goto out;
3847
3848 op->height = font.height;
3849 op->width = font.width;
3850 op->charcount = font.charcount;
3851
3852 if (op->data && copy_to_user(op->data, font.data, c))
3853 rc = -EFAULT;
3854
3855out:
3856 kfree(font.data);
3857 return rc;
3858}
3859
3860static int con_font_set(struct vc_data *vc, struct console_font_op *op)
3861{
3862 struct console_font font;
3863 int rc = -EINVAL;
3864 int size;
3865
3866 if (vc->vc_mode != KD_TEXT)
3867 return -EINVAL;
3868 if (!op->data)
3869 return -EINVAL;
3870 if (op->charcount > 512)
3871 return -EINVAL;
3872 if (!op->height) { /* Need to guess font height [compat] */
3873 int h, i;
3874 u8 __user *charmap = op->data;
3875 u8 tmp;
3876
3877 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
3878 so that we can get rid of this soon */
3879 if (!(op->flags & KD_FONT_FLAG_OLD))
3880 return -EINVAL;
3881 for (h = 32; h > 0; h--)
3882 for (i = 0; i < op->charcount; i++) {
3883 if (get_user(tmp, &charmap[32*i+h-1]))
3884 return -EFAULT;
3885 if (tmp)
3886 goto nonzero;
3887 }
3888 return -EINVAL;
3889 nonzero:
3890 op->height = h;
3891 }
3892 if (op->width <= 0 || op->width > 32 || op->height > 32)
3893 return -EINVAL;
3894 size = (op->width+7)/8 * 32 * op->charcount;
3895 if (size > max_font_size)
3896 return -ENOSPC;
3897 font.charcount = op->charcount;
3898 font.height = op->height;
3899 font.width = op->width;
3900 font.data = kmalloc(size, GFP_KERNEL);
3901 if (!font.data)
3902 return -ENOMEM;
3903 if (copy_from_user(font.data, op->data, size)) {
3904 kfree(font.data);
3905 return -EFAULT;
3906 }
3907 acquire_console_sem();
3908 if (vc->vc_sw->con_font_set)
3909 rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
3910 else
3911 rc = -ENOSYS;
3912 release_console_sem();
3913 kfree(font.data);
3914 return rc;
3915}
3916
3917static int con_font_default(struct vc_data *vc, struct console_font_op *op)
3918{
3919 struct console_font font = {.width = op->width, .height = op->height};
3920 char name[MAX_FONT_NAME];
3921 char *s = name;
3922 int rc;
3923
3924 if (vc->vc_mode != KD_TEXT)
3925 return -EINVAL;
3926
3927 if (!op->data)
3928 s = NULL;
3929 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0)
3930 return -EFAULT;
3931 else
3932 name[MAX_FONT_NAME - 1] = 0;
3933
3934 acquire_console_sem();
3935 if (vc->vc_sw->con_font_default)
3936 rc = vc->vc_sw->con_font_default(vc, &font, s);
3937 else
3938 rc = -ENOSYS;
3939 release_console_sem();
3940 if (!rc) {
3941 op->width = font.width;
3942 op->height = font.height;
3943 }
3944 return rc;
3945}
3946
3947static int con_font_copy(struct vc_data *vc, struct console_font_op *op)
3948{
3949 int con = op->height;
3950 int rc;
3951
3952 if (vc->vc_mode != KD_TEXT)
3953 return -EINVAL;
3954
3955 acquire_console_sem();
3956 if (!vc->vc_sw->con_font_copy)
3957 rc = -ENOSYS;
3958 else if (con < 0 || !vc_cons_allocated(con))
3959 rc = -ENOTTY;
3960 else if (con == vc->vc_num) /* nothing to do */
3961 rc = 0;
3962 else
3963 rc = vc->vc_sw->con_font_copy(vc, con);
3964 release_console_sem();
3965 return rc;
3966}
3967
3968int con_font_op(struct vc_data *vc, struct console_font_op *op)
3969{
3970 switch (op->op) {
3971 case KD_FONT_OP_SET:
3972 return con_font_set(vc, op);
3973 case KD_FONT_OP_GET:
3974 return con_font_get(vc, op);
3975 case KD_FONT_OP_SET_DEFAULT:
3976 return con_font_default(vc, op);
3977 case KD_FONT_OP_COPY:
3978 return con_font_copy(vc, op);
3979 }
3980 return -ENOSYS;
3981}
3982
3983/*
3984 * Interface exported to selection and vcs.
3985 */
3986
3987/* used by selection */
3988u16 screen_glyph(struct vc_data *vc, int offset)
3989{
3990 u16 w = scr_readw(screenpos(vc, offset, 1));
3991 u16 c = w & 0xff;
3992
3993 if (w & vc->vc_hi_font_mask)
3994 c |= 0x100;
3995 return c;
3996}
3997
3998/* used by vcs - note the word offset */
3999unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed)
4000{
4001 return screenpos(vc, 2 * w_offset, viewed);
4002}
4003
4004void getconsxy(struct vc_data *vc, unsigned char *p)
4005{
4006 p[0] = vc->vc_x;
4007 p[1] = vc->vc_y;
4008}
4009
4010void putconsxy(struct vc_data *vc, unsigned char *p)
4011{
9477e260 4012 hide_cursor(vc);
1da177e4
LT		 4013 gotoxy(vc, p[0], p[1]);
4014 set_cursor(vc);
4015}
4016
4017u16 vcs_scr_readw(struct vc_data *vc, const u16 *org)
4018{
4019 if ((unsigned long)org == vc->vc_pos && softcursor_original != -1)
4020 return softcursor_original;
4021 return scr_readw(org);
4022}
4023
4024void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org)
4025{
4026 scr_writew(val, org);
4027 if ((unsigned long)org == vc->vc_pos) {
4028 softcursor_original = -1;
4029 add_softcursor(vc);
4030 }
4031}
4032
4033/*
4034 * Visible symbols for modules
4035 */
4036
4037EXPORT_SYMBOL(color_table);
4038EXPORT_SYMBOL(default_red);
4039EXPORT_SYMBOL(default_grn);
4040EXPORT_SYMBOL(default_blu);
4041EXPORT_SYMBOL(update_region);
4042EXPORT_SYMBOL(redraw_screen);
4043EXPORT_SYMBOL(vc_resize);
ca9bda00 4044EXPORT_SYMBOL(vc_lock_resize);
1da177e4
LT		 4045EXPORT_SYMBOL(fg_console);
4046EXPORT_SYMBOL(console_blank_hook);
4047EXPORT_SYMBOL(console_blanked);
4048EXPORT_SYMBOL(vc_cons);
4049#ifndef VT_SINGLE_DRIVER
4050EXPORT_SYMBOL(take_over_console);
4051EXPORT_SYMBOL(give_up_console);
4052#endif
Clone of davem's net-next-2.6 tree