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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
f700d6e5 264#define DO_UPDATE(vc) (CON_IS_VISIBLE(vc) && !console_blanked)
1da177e4
LT		 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) | ' ';
774533b3 437 vc->vc_scrl_erase_char = (build_attr(vc, vc->vc_def_color, 1, false, false, vc->vc_decscnm, 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)
8c9a9dd0
AC		 806
807/**
808 * vc_do_resize - resizing method for the tty
809 * @tty: tty being resized
810 * @real_tty: real tty (different to tty if a pty/tty pair)
811 * @vc: virtual console private data
812 * @cols: columns
813 * @lines: lines
814 *
815 * Resize a virtual console, clipping according to the actual constraints.
816 * If the caller passes a tty structure then update the termios winsize
817 * information and perform any neccessary signal handling.
818 *
819 * Caller must hold the console semaphore. Takes the termios mutex and
820 * ctrl_lock of the tty IFF a tty is passed.
821 */
822
823static int vc_do_resize(struct tty_struct *tty, struct tty_struct *real_tty,
824 struct vc_data *vc, unsigned int cols, unsigned int lines)
1da177e4
LT		 825{
826 unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0;
827 unsigned int old_cols, old_rows, old_row_size, old_screen_size;
828 unsigned int new_cols, new_rows, new_row_size, new_screen_size;
e400b6ec 829 unsigned int end, user;
1da177e4
LT		 830 unsigned short *newscreen;
831
832 WARN_CONSOLE_UNLOCKED();
833
834 if (!vc)
835 return -ENXIO;
836
e400b6ec
AD		 837 user = vc->vc_resize_user;
838 vc->vc_resize_user = 0;
839
1da177e4
LT		 840 if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW)
841 return -EINVAL;
842
843 new_cols = (cols ? cols : vc->vc_cols);
844 new_rows = (lines ? lines : vc->vc_rows);
845 new_row_size = new_cols << 1;
846 new_screen_size = new_row_size * new_rows;
847
848 if (new_cols == vc->vc_cols && new_rows == vc->vc_rows)
849 return 0;
850
5cbded58 851 newscreen = kmalloc(new_screen_size, GFP_USER);
1da177e4
LT		 852 if (!newscreen)
853 return -ENOMEM;
854
855 old_rows = vc->vc_rows;
856 old_cols = vc->vc_cols;
857 old_row_size = vc->vc_size_row;
858 old_screen_size = vc->vc_screenbuf_size;
859
e400b6ec 860 err = resize_screen(vc, new_cols, new_rows, user);
1da177e4
LT		 861 if (err) {
862 kfree(newscreen);
863 return err;
864 }
865
866 vc->vc_rows = new_rows;
867 vc->vc_cols = new_cols;
868 vc->vc_size_row = new_row_size;
869 vc->vc_screenbuf_size = new_screen_size;
870
871 rlth = min(old_row_size, new_row_size);
872 rrem = new_row_size - rlth;
873 old_origin = vc->vc_origin;
874 new_origin = (long) newscreen;
875 new_scr_end = new_origin + new_screen_size;
3b41dc1a
AD		 876
877 if (vc->vc_y > new_rows) {
878 if (old_rows - vc->vc_y < new_rows) {
879 /*
880 * Cursor near the bottom, copy contents from the
881 * bottom of buffer
882 */
883 old_origin += (old_rows - new_rows) * old_row_size;
884 end = vc->vc_scr_end;
885 } else {
886 /*
887 * Cursor is in no man's land, copy 1/2 screenful
888 * from the top and bottom of cursor position
889 */
890 old_origin += (vc->vc_y - new_rows/2) * old_row_size;
065d9cac 891 end = old_origin + (old_row_size * new_rows);
3b41dc1a
AD		 892 }
893 } else
894 /*
895 * Cursor near the top, copy contents from the top of buffer
896 */
065d9cac
AD		 897 end = (old_rows > new_rows) ? old_origin +
898 (old_row_size * new_rows) :
3b41dc1a 899 vc->vc_scr_end;
1da177e4
LT		 900
901 update_attr(vc);
902
3b41dc1a
AD		 903 while (old_origin < end) {
904 scr_memcpyw((unsigned short *) new_origin,
905 (unsigned short *) old_origin, rlth);
1da177e4 906 if (rrem)
3b41dc1a
AD		 907 scr_memsetw((void *)(new_origin + rlth),
908 vc->vc_video_erase_char, rrem);
1da177e4
LT		 909 old_origin += old_row_size;
910 new_origin += new_row_size;
911 }
912 if (new_scr_end > new_origin)
3b41dc1a
AD		 913 scr_memsetw((void *)new_origin, vc->vc_video_erase_char,
914 new_scr_end - new_origin);
1da177e4
LT		 915 if (vc->vc_kmalloced)
916 kfree(vc->vc_screenbuf);
917 vc->vc_screenbuf = newscreen;
918 vc->vc_kmalloced = 1;
919 vc->vc_screenbuf_size = new_screen_size;
920 set_origin(vc);
921
922 /* do part of a reset_terminal() */
923 vc->vc_top = 0;
924 vc->vc_bottom = vc->vc_rows;
925 gotoxy(vc, vc->vc_x, vc->vc_y);
926 save_cur(vc);
927
8c9a9dd0
AC		 928 if (tty) {
929 /* Rewrite the requested winsize data with the actual
930 resulting sizes */
931 struct winsize ws;
1da177e4
LT		 932 memset(&ws, 0, sizeof(ws));
933 ws.ws_row = vc->vc_rows;
934 ws.ws_col = vc->vc_cols;
935 ws.ws_ypixel = vc->vc_scan_lines;
8c9a9dd0 936 tty_do_resize(tty, real_tty, &ws);
1da177e4
LT		 937 }
938
939 if (CON_IS_VISIBLE(vc))
940 update_screen(vc);
941 return err;
942}
943
8c9a9dd0
AC		 944/**
945 * vc_resize - resize a VT
946 * @vc: virtual console
947 * @cols: columns
948 * @rows: rows
949 *
950 * Resize a virtual console as seen from the console end of things. We
951 * use the common vc_do_resize methods to update the structures. The
952 * caller must hold the console sem to protect console internals and
953 * vc->vc_tty
954 */
955
956int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int rows)
957{
958 return vc_do_resize(vc->vc_tty, vc->vc_tty, vc, cols, rows);
959}
960
961/**
962 * vt_resize - resize a VT
963 * @tty: tty to resize
964 * @real_tty: tty if a pty/tty pair
965 * @ws: winsize attributes
966 *
967 * Resize a virtual terminal. This is called by the tty layer as we
968 * register our own handler for resizing. The mutual helper does all
969 * the actual work.
970 *
971 * Takes the console sem and the called methods then take the tty
972 * termios_mutex and the tty ctrl_lock in that order.
973 */
974
975int vt_resize(struct tty_struct *tty, struct tty_struct *real_tty,
976 struct winsize *ws)
ca9bda00 977{
8c9a9dd0
AC		 978 struct vc_data *vc = tty->driver_data;
979 int ret;
ca9bda00
AC		 980
981 acquire_console_sem();
8c9a9dd0 982 ret = vc_do_resize(tty, real_tty, vc, ws->ws_col, ws->ws_row);
ca9bda00 983 release_console_sem();
8c9a9dd0 984 return ret;
ca9bda00 985}
1da177e4 986
ca9bda00 987void vc_deallocate(unsigned int currcons)
1da177e4
LT		 988{
989 WARN_CONSOLE_UNLOCKED();
990
991 if (vc_cons_allocated(currcons)) {
992 struct vc_data *vc = vc_cons[currcons].d;
b293d758
ST		 993 struct vt_notifier_param param = { .vc = vc };
994 atomic_notifier_call_chain(&vt_notifier_list, VT_DEALLOCATE, &param);
1da177e4 995 vc->vc_sw->con_deinit(vc);
bde0d2c9 996 put_pid(vc->vt_pid);
d459ec0b 997 module_put(vc->vc_sw->owner);
1da177e4
LT		 998 if (vc->vc_kmalloced)
999 kfree(vc->vc_screenbuf);
1000 if (currcons >= MIN_NR_CONSOLES)
1001 kfree(vc);
1002 vc_cons[currcons].d = NULL;
1003 }
1004}
1005
1006/*
1007 * VT102 emulator
1008 */
1009
1010#define set_kbd(vc, x) set_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1011#define clr_kbd(vc, x) clr_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1012#define is_kbd(vc, x) vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1013
1014#define decarm VC_REPEAT
1015#define decckm VC_CKMODE
1016#define kbdapplic VC_APPLIC
1017#define lnm VC_CRLF
1018
1019/*
1020 * this is what the terminal answers to a ESC-Z or csi0c query.
1021 */
1022#define VT100ID "\033[?1;2c"
1023#define VT102ID "\033[?6c"
1024
1025unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7,
1026 8,12,10,14, 9,13,11,15 };
1027
1028/* the default colour table, for VGA+ colour systems */
1029int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
1030 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
1031int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
1032 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
1033int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
1034 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
1035
1c2bbe6a
JE		 1036module_param_array(default_red, int, NULL, S_IRUGO | S_IWUSR);
1037module_param_array(default_grn, int, NULL, S_IRUGO | S_IWUSR);
1038module_param_array(default_blu, int, NULL, S_IRUGO | S_IWUSR);
1039
1da177e4
LT		 1040/*
1041 * gotoxy() must verify all boundaries, because the arguments
1042 * might also be negative. If the given position is out of
1043 * bounds, the cursor is placed at the nearest margin.
1044 */
1045static void gotoxy(struct vc_data *vc, int new_x, int new_y)
1046{
1047 int min_y, max_y;
1048
1049 if (new_x < 0)
1050 vc->vc_x = 0;
1051 else {
1052 if (new_x >= vc->vc_cols)
1053 vc->vc_x = vc->vc_cols - 1;
1054 else
1055 vc->vc_x = new_x;
1056 }
1057
1058 if (vc->vc_decom) {
1059 min_y = vc->vc_top;
1060 max_y = vc->vc_bottom;
1061 } else {
1062 min_y = 0;
1063 max_y = vc->vc_rows;
1064 }
1065 if (new_y < min_y)
1066 vc->vc_y = min_y;
1067 else if (new_y >= max_y)
1068 vc->vc_y = max_y - 1;
1069 else
1070 vc->vc_y = new_y;
1071 vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1);
1072 vc->vc_need_wrap = 0;
1073}
1074
1075/* for absolute user moves, when decom is set */
1076static void gotoxay(struct vc_data *vc, int new_x, int new_y)
1077{
1078 gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y);
1079}
1080
1081void scrollback(struct vc_data *vc, int lines)
1082{
1083 if (!lines)
1084 lines = vc->vc_rows / 2;
1085 scrolldelta(-lines);
1086}
1087
1088void scrollfront(struct vc_data *vc, int lines)
1089{
1090 if (!lines)
1091 lines = vc->vc_rows / 2;
1092 scrolldelta(lines);
1093}
1094
1095static void lf(struct vc_data *vc)
1096{
1097 /* don't scroll if above bottom of scrolling region, or
1098 * if below scrolling region
1099 */
1100 if (vc->vc_y + 1 == vc->vc_bottom)
1101 scrup(vc, vc->vc_top, vc->vc_bottom, 1);
1102 else if (vc->vc_y < vc->vc_rows - 1) {
1103 vc->vc_y++;
1104 vc->vc_pos += vc->vc_size_row;
1105 }
1106 vc->vc_need_wrap = 0;
b293d758 1107 notify_write(vc, '\n');
1da177e4
LT		 1108}
1109
1110static void ri(struct vc_data *vc)
1111{
1112 /* don't scroll if below top of scrolling region, or
1113 * if above scrolling region
1114 */
1115 if (vc->vc_y == vc->vc_top)
1116 scrdown(vc, vc->vc_top, vc->vc_bottom, 1);
1117 else if (vc->vc_y > 0) {
1118 vc->vc_y--;
1119 vc->vc_pos -= vc->vc_size_row;
1120 }
1121 vc->vc_need_wrap = 0;
1122}
1123
1124static inline void cr(struct vc_data *vc)
1125{
1126 vc->vc_pos -= vc->vc_x << 1;
1127 vc->vc_need_wrap = vc->vc_x = 0;
b293d758 1128 notify_write(vc, '\r');
1da177e4
LT		 1129}
1130
1131static inline void bs(struct vc_data *vc)
1132{
1133 if (vc->vc_x) {
1134 vc->vc_pos -= 2;
1135 vc->vc_x--;
1136 vc->vc_need_wrap = 0;
b293d758 1137 notify_write(vc, '\b');
1da177e4
LT		 1138 }
1139}
1140
1141static inline void del(struct vc_data *vc)
1142{
1143 /* ignored */
1144}
1145
1146static void csi_J(struct vc_data *vc, int vpar)
1147{
1148 unsigned int count;
1149 unsigned short * start;
1150
1151 switch (vpar) {
1152 case 0: /* erase from cursor to end of display */
1153 count = (vc->vc_scr_end - vc->vc_pos) >> 1;
1154 start = (unsigned short *)vc->vc_pos;
1155 if (DO_UPDATE(vc)) {
1156 /* do in two stages */
1157 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1158 vc->vc_cols - vc->vc_x);
1159 vc->vc_sw->con_clear(vc, vc->vc_y + 1, 0,
1160 vc->vc_rows - vc->vc_y - 1,
1161 vc->vc_cols);
1162 }
1163 break;
1164 case 1: /* erase from start to cursor */
1165 count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1;
1166 start = (unsigned short *)vc->vc_origin;
1167 if (DO_UPDATE(vc)) {
1168 /* do in two stages */
1169 vc->vc_sw->con_clear(vc, 0, 0, vc->vc_y,
1170 vc->vc_cols);
1171 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1172 vc->vc_x + 1);
1173 }
1174 break;
1175 case 2: /* erase whole display */
1176 count = vc->vc_cols * vc->vc_rows;
1177 start = (unsigned short *)vc->vc_origin;
1178 if (DO_UPDATE(vc))
1179 vc->vc_sw->con_clear(vc, 0, 0,
1180 vc->vc_rows,
1181 vc->vc_cols);
1182 break;
1183 default:
1184 return;
1185 }
1186 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1187 vc->vc_need_wrap = 0;
1188}
1189
1190static void csi_K(struct vc_data *vc, int vpar)
1191{
1192 unsigned int count;
1193 unsigned short * start;
1194
1195 switch (vpar) {
1196 case 0: /* erase from cursor to end of line */
1197 count = vc->vc_cols - vc->vc_x;
1198 start = (unsigned short *)vc->vc_pos;
1199 if (DO_UPDATE(vc))
1200 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1201 vc->vc_cols - vc->vc_x);
1202 break;
1203 case 1: /* erase from start of line to cursor */
1204 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1205 count = vc->vc_x + 1;
1206 if (DO_UPDATE(vc))
1207 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1208 vc->vc_x + 1);
1209 break;
1210 case 2: /* erase whole line */
1211 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1212 count = vc->vc_cols;
1213 if (DO_UPDATE(vc))
1214 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1215 vc->vc_cols);
1216 break;
1217 default:
1218 return;
1219 }
1220 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1221 vc->vc_need_wrap = 0;
1222}
1223
1224static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */
1225{ /* not vt100? */
1226 int count;
1227
1228 if (!vpar)
1229 vpar++;
1230 count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar;
1231
1232 scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count);
1233 if (DO_UPDATE(vc))
1234 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count);
1235 vc->vc_need_wrap = 0;
1236}
1237
1238static void default_attr(struct vc_data *vc)
1239{
1240 vc->vc_intensity = 1;
fa6ce9ab 1241 vc->vc_italic = 0;
1da177e4
LT		 1242 vc->vc_underline = 0;
1243 vc->vc_reverse = 0;
1244 vc->vc_blink = 0;
1245 vc->vc_color = vc->vc_def_color;
1246}
1247
1248/* console_sem is held */
1249static void csi_m(struct vc_data *vc)
1250{
1251 int i;
1252
1253 for (i = 0; i <= vc->vc_npar; i++)
1254 switch (vc->vc_par[i]) {
1255 case 0: /* all attributes off */
1256 default_attr(vc);
1257 break;
1258 case 1:
1259 vc->vc_intensity = 2;
1260 break;
1261 case 2:
1262 vc->vc_intensity = 0;
1263 break;
fa6ce9ab
JE		 1264 case 3:
1265 vc->vc_italic = 1;
1266 break;
1da177e4
LT		 1267 case 4:
1268 vc->vc_underline = 1;
1269 break;
1270 case 5:
1271 vc->vc_blink = 1;
1272 break;
1273 case 7:
1274 vc->vc_reverse = 1;
1275 break;
1276 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1277 * Select primary font, don't display
1278 * control chars if defined, don't set
1279 * bit 8 on output.
1280 */
1281 vc->vc_translate = set_translate(vc->vc_charset == 0
1282 ? vc->vc_G0_charset
1283 : vc->vc_G1_charset, vc);
1284 vc->vc_disp_ctrl = 0;
1285 vc->vc_toggle_meta = 0;
1286 break;
1287 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1288 * Select first alternate font, lets
1289 * chars < 32 be displayed as ROM chars.
1290 */
1291 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1292 vc->vc_disp_ctrl = 1;
1293 vc->vc_toggle_meta = 0;
1294 break;
1295 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1296 * Select second alternate font, toggle
1297 * high bit before displaying as ROM char.
1298 */
1299 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1300 vc->vc_disp_ctrl = 1;
1301 vc->vc_toggle_meta = 1;
1302 break;
1303 case 21:
1304 case 22:
1305 vc->vc_intensity = 1;
1306 break;
fa6ce9ab
JE		 1307 case 23:
1308 vc->vc_italic = 0;
1309 break;
1da177e4
LT		 1310 case 24:
1311 vc->vc_underline = 0;
1312 break;
1313 case 25:
1314 vc->vc_blink = 0;
1315 break;
1316 case 27:
1317 vc->vc_reverse = 0;
1318 break;
1319 case 38: /* ANSI X3.64-1979 (SCO-ish?)
1320 * Enables underscore, white foreground
1321 * with white underscore (Linux - use
1322 * default foreground).
1323 */
1324 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1325 vc->vc_underline = 1;
1326 break;
1327 case 39: /* ANSI X3.64-1979 (SCO-ish?)
1328 * Disable underline option.
1329 * Reset colour to default? It did this
1330 * before...
1331 */
1332 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1333 vc->vc_underline = 0;
1334 break;
1335 case 49:
1336 vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f);
1337 break;
1338 default:
1339 if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37)
1340 vc->vc_color = color_table[vc->vc_par[i] - 30]
1341 | (vc->vc_color & 0xf0);
1342 else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47)
1343 vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4)
1344 | (vc->vc_color & 0x0f);
1345 break;
1346 }
1347 update_attr(vc);
1348}
1349
1350static void respond_string(const char *p, struct tty_struct *tty)
1351{
1352 while (*p) {
1353 tty_insert_flip_char(tty, *p, 0);
1354 p++;
1355 }
1356 con_schedule_flip(tty);
1357}
1358
1359static void cursor_report(struct vc_data *vc, struct tty_struct *tty)
1360{
1361 char buf[40];
1362
1363 sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1);
1364 respond_string(buf, tty);
1365}
1366
1367static inline void status_report(struct tty_struct *tty)
1368{
1369 respond_string("\033[0n", tty); /* Terminal ok */
1370}
1371
1372static inline void respond_ID(struct tty_struct * tty)
1373{
1374 respond_string(VT102ID, tty);
1375}
1376
1377void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry)
1378{
1379 char buf[8];
1380
1381 sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx),
1382 (char)('!' + mry));
1383 respond_string(buf, tty);
1384}
1385
1386/* invoked via ioctl(TIOCLINUX) and through set_selection */
1387int mouse_reporting(void)
1388{
1389 return vc_cons[fg_console].d->vc_report_mouse;
1390}
1391
1392/* console_sem is held */
1393static void set_mode(struct vc_data *vc, int on_off)
1394{
1395 int i;
1396
1397 for (i = 0; i <= vc->vc_npar; i++)
1398 if (vc->vc_ques) {
1399 switch(vc->vc_par[i]) { /* DEC private modes set/reset */
1400 case 1: /* Cursor keys send ^[Ox/^[[x */
1401 if (on_off)
1402 set_kbd(vc, decckm);
1403 else
1404 clr_kbd(vc, decckm);
1405 break;
1406 case 3: /* 80/132 mode switch unimplemented */
1407 vc->vc_deccolm = on_off;
1408#if 0
1409 vc_resize(deccolm ? 132 : 80, vc->vc_rows);
1410 /* this alone does not suffice; some user mode
1411 utility has to change the hardware regs */
1412#endif
1413 break;
1414 case 5: /* Inverted screen on/off */
1415 if (vc->vc_decscnm != on_off) {
1416 vc->vc_decscnm = on_off;
1417 invert_screen(vc, 0, vc->vc_screenbuf_size, 0);
1418 update_attr(vc);
1419 }
1420 break;
1421 case 6: /* Origin relative/absolute */
1422 vc->vc_decom = on_off;
1423 gotoxay(vc, 0, 0);
1424 break;
1425 case 7: /* Autowrap on/off */
1426 vc->vc_decawm = on_off;
1427 break;
1428 case 8: /* Autorepeat on/off */
1429 if (on_off)
1430 set_kbd(vc, decarm);
1431 else
1432 clr_kbd(vc, decarm);
1433 break;
1434 case 9:
1435 vc->vc_report_mouse = on_off ? 1 : 0;
1436 break;
1437 case 25: /* Cursor on/off */
1438 vc->vc_deccm = on_off;
1439 break;
1440 case 1000:
1441 vc->vc_report_mouse = on_off ? 2 : 0;
1442 break;
1443 }
1444 } else {
1445 switch(vc->vc_par[i]) { /* ANSI modes set/reset */
1446 case 3: /* Monitor (display ctrls) */
1447 vc->vc_disp_ctrl = on_off;
1448 break;
1449 case 4: /* Insert Mode on/off */
1450 vc->vc_decim = on_off;
1451 break;
1452 case 20: /* Lf, Enter == CrLf/Lf */
1453 if (on_off)
1454 set_kbd(vc, lnm);
1455 else
1456 clr_kbd(vc, lnm);
1457 break;
1458 }
1459 }
1460}
1461
1462/* console_sem is held */
1463static void setterm_command(struct vc_data *vc)
1464{
1465 switch(vc->vc_par[0]) {
1466 case 1: /* set color for underline mode */
1467 if (vc->vc_can_do_color &&
1468 vc->vc_par[1] < 16) {
1469 vc->vc_ulcolor = color_table[vc->vc_par[1]];
1470 if (vc->vc_underline)
1471 update_attr(vc);
1472 }
1473 break;
1474 case 2: /* set color for half intensity mode */
1475 if (vc->vc_can_do_color &&
1476 vc->vc_par[1] < 16) {
1477 vc->vc_halfcolor = color_table[vc->vc_par[1]];
1478 if (vc->vc_intensity == 0)
1479 update_attr(vc);
1480 }
1481 break;
1482 case 8: /* store colors as defaults */
1483 vc->vc_def_color = vc->vc_attr;
1484 if (vc->vc_hi_font_mask == 0x100)
1485 vc->vc_def_color >>= 1;
1486 default_attr(vc);
1487 update_attr(vc);
1488 break;
1489 case 9: /* set blanking interval */
1490 blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1491 poke_blanked_console();
1492 break;
1493 case 10: /* set bell frequency in Hz */
1494 if (vc->vc_npar >= 1)
1495 vc->vc_bell_pitch = vc->vc_par[1];
1496 else
1497 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1498 break;
1499 case 11: /* set bell duration in msec */
1500 if (vc->vc_npar >= 1)
1501 vc->vc_bell_duration = (vc->vc_par[1] < 2000) ?
1502 vc->vc_par[1] * HZ / 1000 : 0;
1503 else
1504 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1505 break;
1506 case 12: /* bring specified console to the front */
1507 if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1))
1508 set_console(vc->vc_par[1] - 1);
1509 break;
1510 case 13: /* unblank the screen */
1511 poke_blanked_console();
1512 break;
1513 case 14: /* set vesa powerdown interval */
1514 vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1515 break;
1516 case 15: /* activate the previous console */
1517 set_console(last_console);
1518 break;
1519 }
1520}
1521
1522/* console_sem is held */
1523static void csi_at(struct vc_data *vc, unsigned int nr)
1524{
1525 if (nr > vc->vc_cols - vc->vc_x)
1526 nr = vc->vc_cols - vc->vc_x;
1527 else if (!nr)
1528 nr = 1;
1529 insert_char(vc, nr);
1530}
1531
1532/* console_sem is held */
1533static void csi_L(struct vc_data *vc, unsigned int nr)
1534{
1535 if (nr > vc->vc_rows - vc->vc_y)
1536 nr = vc->vc_rows - vc->vc_y;
1537 else if (!nr)
1538 nr = 1;
1539 scrdown(vc, vc->vc_y, vc->vc_bottom, nr);
1540 vc->vc_need_wrap = 0;
1541}
1542
1543/* console_sem is held */
1544static void csi_P(struct vc_data *vc, unsigned int nr)
1545{
1546 if (nr > vc->vc_cols - vc->vc_x)
1547 nr = vc->vc_cols - vc->vc_x;
1548 else if (!nr)
1549 nr = 1;
1550 delete_char(vc, nr);
1551}
1552
1553/* console_sem is held */
1554static void csi_M(struct vc_data *vc, unsigned int nr)
1555{
1556 if (nr > vc->vc_rows - vc->vc_y)
1557 nr = vc->vc_rows - vc->vc_y;
1558 else if (!nr)
1559 nr=1;
1560 scrup(vc, vc->vc_y, vc->vc_bottom, nr);
1561 vc->vc_need_wrap = 0;
1562}
1563
1564/* console_sem is held (except via vc_init->reset_terminal */
1565static void save_cur(struct vc_data *vc)
1566{
1567 vc->vc_saved_x = vc->vc_x;
1568 vc->vc_saved_y = vc->vc_y;
1569 vc->vc_s_intensity = vc->vc_intensity;
fa6ce9ab 1570 vc->vc_s_italic = vc->vc_italic;
1da177e4
LT		 1571 vc->vc_s_underline = vc->vc_underline;
1572 vc->vc_s_blink = vc->vc_blink;
1573 vc->vc_s_reverse = vc->vc_reverse;
1574 vc->vc_s_charset = vc->vc_charset;
1575 vc->vc_s_color = vc->vc_color;
1576 vc->vc_saved_G0 = vc->vc_G0_charset;
1577 vc->vc_saved_G1 = vc->vc_G1_charset;
1578}
1579
1580/* console_sem is held */
1581static void restore_cur(struct vc_data *vc)
1582{
1583 gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y);
1584 vc->vc_intensity = vc->vc_s_intensity;
fa6ce9ab 1585 vc->vc_italic = vc->vc_s_italic;
1da177e4
LT		 1586 vc->vc_underline = vc->vc_s_underline;
1587 vc->vc_blink = vc->vc_s_blink;
1588 vc->vc_reverse = vc->vc_s_reverse;
1589 vc->vc_charset = vc->vc_s_charset;
1590 vc->vc_color = vc->vc_s_color;
1591 vc->vc_G0_charset = vc->vc_saved_G0;
1592 vc->vc_G1_charset = vc->vc_saved_G1;
1593 vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc);
1594 update_attr(vc);
1595 vc->vc_need_wrap = 0;
1596}
1597
1598enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey,
1599 EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd,
1600 ESpalette };
1601
1602/* console_sem is held (except via vc_init()) */
1603static void reset_terminal(struct vc_data *vc, int do_clear)
1604{
1605 vc->vc_top = 0;
1606 vc->vc_bottom = vc->vc_rows;
1607 vc->vc_state = ESnormal;
1608 vc->vc_ques = 0;
1609 vc->vc_translate = set_translate(LAT1_MAP, vc);
1610 vc->vc_G0_charset = LAT1_MAP;
1611 vc->vc_G1_charset = GRAF_MAP;
1612 vc->vc_charset = 0;
1613 vc->vc_need_wrap = 0;
1614 vc->vc_report_mouse = 0;
042f10ec 1615 vc->vc_utf = default_utf8;
1da177e4
LT		 1616 vc->vc_utf_count = 0;
1617
1618 vc->vc_disp_ctrl = 0;
1619 vc->vc_toggle_meta = 0;
1620
1621 vc->vc_decscnm = 0;
1622 vc->vc_decom = 0;
1623 vc->vc_decawm = 1;
1624 vc->vc_deccm = 1;
1625 vc->vc_decim = 0;
1626
1627 set_kbd(vc, decarm);
1628 clr_kbd(vc, decckm);
1629 clr_kbd(vc, kbdapplic);
1630 clr_kbd(vc, lnm);
1631 kbd_table[vc->vc_num].lockstate = 0;
1632 kbd_table[vc->vc_num].slockstate = 0;
1633 kbd_table[vc->vc_num].ledmode = LED_SHOW_FLAGS;
1634 kbd_table[vc->vc_num].ledflagstate = kbd_table[vc->vc_num].default_ledflagstate;
1635 /* do not do set_leds here because this causes an endless tasklet loop
1636 when the keyboard hasn't been initialized yet */
1637
1638 vc->vc_cursor_type = CUR_DEFAULT;
1639 vc->vc_complement_mask = vc->vc_s_complement_mask;
1640
1641 default_attr(vc);
1642 update_attr(vc);
1643
1644 vc->vc_tab_stop[0] = 0x01010100;
1645 vc->vc_tab_stop[1] =
1646 vc->vc_tab_stop[2] =
1647 vc->vc_tab_stop[3] =
1648 vc->vc_tab_stop[4] = 0x01010101;
1649
1650 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1651 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1652
1653 gotoxy(vc, 0, 0);
1654 save_cur(vc);
1655 if (do_clear)
1656 csi_J(vc, 2);
1657}
1658
1659/* console_sem is held */
1660static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
1661{
1662 /*
1663 * Control characters can be used in the _middle_
1664 * of an escape sequence.
1665 */
1666 switch (c) {
1667 case 0:
1668 return;
1669 case 7:
1670 if (vc->vc_bell_duration)
1671 kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration);
1672 return;
1673 case 8:
1674 bs(vc);
1675 return;
1676 case 9:
1677 vc->vc_pos -= (vc->vc_x << 1);
1678 while (vc->vc_x < vc->vc_cols - 1) {
1679 vc->vc_x++;
1680 if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31)))
1681 break;
1682 }
1683 vc->vc_pos += (vc->vc_x << 1);
b293d758 1684 notify_write(vc, '\t');
1da177e4
LT		 1685 return;
1686 case 10: case 11: case 12:
1687 lf(vc);
1688 if (!is_kbd(vc, lnm))
1689 return;
1690 case 13:
1691 cr(vc);
1692 return;
1693 case 14:
1694 vc->vc_charset = 1;
1695 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1696 vc->vc_disp_ctrl = 1;
1697 return;
1698 case 15:
1699 vc->vc_charset = 0;
1700 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1701 vc->vc_disp_ctrl = 0;
1702 return;
1703 case 24: case 26:
1704 vc->vc_state = ESnormal;
1705 return;
1706 case 27:
1707 vc->vc_state = ESesc;
1708 return;
1709 case 127:
1710 del(vc);
1711 return;
1712 case 128+27:
1713 vc->vc_state = ESsquare;
1714 return;
1715 }
1716 switch(vc->vc_state) {
1717 case ESesc:
1718 vc->vc_state = ESnormal;
1719 switch (c) {
1720 case '[':
1721 vc->vc_state = ESsquare;
1722 return;
1723 case ']':
1724 vc->vc_state = ESnonstd;
1725 return;
1726 case '%':
1727 vc->vc_state = ESpercent;
1728 return;
1729 case 'E':
1730 cr(vc);
1731 lf(vc);
1732 return;
1733 case 'M':
1734 ri(vc);
1735 return;
1736 case 'D':
1737 lf(vc);
1738 return;
1739 case 'H':
1740 vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31));
1741 return;
1742 case 'Z':
1743 respond_ID(tty);
1744 return;
1745 case '7':
1746 save_cur(vc);
1747 return;
1748 case '8':
1749 restore_cur(vc);
1750 return;
1751 case '(':
1752 vc->vc_state = ESsetG0;
1753 return;
1754 case ')':
1755 vc->vc_state = ESsetG1;
1756 return;
1757 case '#':
1758 vc->vc_state = EShash;
1759 return;
1760 case 'c':
1761 reset_terminal(vc, 1);
1762 return;
1763 case '>': /* Numeric keypad */
1764 clr_kbd(vc, kbdapplic);
1765 return;
1766 case '=': /* Appl. keypad */
1767 set_kbd(vc, kbdapplic);
1768 return;
1769 }
1770 return;
1771 case ESnonstd:
1772 if (c=='P') { /* palette escape sequence */
1773 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1774 vc->vc_par[vc->vc_npar] = 0;
1775 vc->vc_npar = 0;
1776 vc->vc_state = ESpalette;
1777 return;
1778 } else if (c=='R') { /* reset palette */
1779 reset_palette(vc);
1780 vc->vc_state = ESnormal;
1781 } else
1782 vc->vc_state = ESnormal;
1783 return;
1784 case ESpalette:
1785 if ( (c>='0'&&c<='9') || (c>='A'&&c<='F') || (c>='a'&&c<='f') ) {
1786 vc->vc_par[vc->vc_npar++] = (c > '9' ? (c & 0xDF) - 'A' + 10 : c - '0');
1787 if (vc->vc_npar == 7) {
1788 int i = vc->vc_par[0] * 3, j = 1;
1789 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1790 vc->vc_palette[i++] += vc->vc_par[j++];
1791 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1792 vc->vc_palette[i++] += vc->vc_par[j++];
1793 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1794 vc->vc_palette[i] += vc->vc_par[j];
1795 set_palette(vc);
1796 vc->vc_state = ESnormal;
1797 }
1798 } else
1799 vc->vc_state = ESnormal;
1800 return;
1801 case ESsquare:
1802 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1803 vc->vc_par[vc->vc_npar] = 0;
1804 vc->vc_npar = 0;
1805 vc->vc_state = ESgetpars;
1806 if (c == '[') { /* Function key */
1807 vc->vc_state=ESfunckey;
1808 return;
1809 }
1810 vc->vc_ques = (c == '?');
1811 if (vc->vc_ques)
1812 return;
1813 case ESgetpars:
1814 if (c == ';' && vc->vc_npar < NPAR - 1) {
1815 vc->vc_npar++;
1816 return;
1817 } else if (c>='0' && c<='9') {
1818 vc->vc_par[vc->vc_npar] *= 10;
1819 vc->vc_par[vc->vc_npar] += c - '0';
1820 return;
1821 } else
1822 vc->vc_state = ESgotpars;
1823 case ESgotpars:
1824 vc->vc_state = ESnormal;
1825 switch(c) {
1826 case 'h':
1827 set_mode(vc, 1);
1828 return;
1829 case 'l':
1830 set_mode(vc, 0);
1831 return;
1832 case 'c':
1833 if (vc->vc_ques) {
1834 if (vc->vc_par[0])
1835 vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16);
1836 else
1837 vc->vc_cursor_type = CUR_DEFAULT;
1838 return;
1839 }
1840 break;
1841 case 'm':
1842 if (vc->vc_ques) {
1843 clear_selection();
1844 if (vc->vc_par[0])
1845 vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1];
1846 else
1847 vc->vc_complement_mask = vc->vc_s_complement_mask;
1848 return;
1849 }
1850 break;
1851 case 'n':
1852 if (!vc->vc_ques) {
1853 if (vc->vc_par[0] == 5)
1854 status_report(tty);
1855 else if (vc->vc_par[0] == 6)
1856 cursor_report(vc, tty);
1857 }
1858 return;
1859 }
1860 if (vc->vc_ques) {
1861 vc->vc_ques = 0;
1862 return;
1863 }
1864 switch(c) {
1865 case 'G': case '`':
1866 if (vc->vc_par[0])
1867 vc->vc_par[0]--;
1868 gotoxy(vc, vc->vc_par[0], vc->vc_y);
1869 return;
1870 case 'A':
1871 if (!vc->vc_par[0])
1872 vc->vc_par[0]++;
1873 gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]);
1874 return;
1875 case 'B': case 'e':
1876 if (!vc->vc_par[0])
1877 vc->vc_par[0]++;
1878 gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]);
1879 return;
1880 case 'C': case 'a':
1881 if (!vc->vc_par[0])
1882 vc->vc_par[0]++;
1883 gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y);
1884 return;
1885 case 'D':
1886 if (!vc->vc_par[0])
1887 vc->vc_par[0]++;
1888 gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y);
1889 return;
1890 case 'E':
1891 if (!vc->vc_par[0])
1892 vc->vc_par[0]++;
1893 gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]);
1894 return;
1895 case 'F':
1896 if (!vc->vc_par[0])
1897 vc->vc_par[0]++;
1898 gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]);
1899 return;
1900 case 'd':
1901 if (vc->vc_par[0])
1902 vc->vc_par[0]--;
1903 gotoxay(vc, vc->vc_x ,vc->vc_par[0]);
1904 return;
1905 case 'H': case 'f':
1906 if (vc->vc_par[0])
1907 vc->vc_par[0]--;
1908 if (vc->vc_par[1])
1909 vc->vc_par[1]--;
1910 gotoxay(vc, vc->vc_par[1], vc->vc_par[0]);
1911 return;
1912 case 'J':
1913 csi_J(vc, vc->vc_par[0]);
1914 return;
1915 case 'K':
1916 csi_K(vc, vc->vc_par[0]);
1917 return;
1918 case 'L':
1919 csi_L(vc, vc->vc_par[0]);
1920 return;
1921 case 'M':
1922 csi_M(vc, vc->vc_par[0]);
1923 return;
1924 case 'P':
1925 csi_P(vc, vc->vc_par[0]);
1926 return;
1927 case 'c':
1928 if (!vc->vc_par[0])
1929 respond_ID(tty);
1930 return;
1931 case 'g':
1932 if (!vc->vc_par[0])
1933 vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31));
1934 else if (vc->vc_par[0] == 3) {
1935 vc->vc_tab_stop[0] =
1936 vc->vc_tab_stop[1] =
1937 vc->vc_tab_stop[2] =
1938 vc->vc_tab_stop[3] =
1939 vc->vc_tab_stop[4] = 0;
1940 }
1941 return;
1942 case 'm':
1943 csi_m(vc);
1944 return;
1945 case 'q': /* DECLL - but only 3 leds */
1946 /* map 0,1,2,3 to 0,1,2,4 */
1947 if (vc->vc_par[0] < 4)
1948 setledstate(kbd_table + vc->vc_num,
1949 (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4);
1950 return;
1951 case 'r':
1952 if (!vc->vc_par[0])
1953 vc->vc_par[0]++;
1954 if (!vc->vc_par[1])
1955 vc->vc_par[1] = vc->vc_rows;
1956 /* Minimum allowed region is 2 lines */
1957 if (vc->vc_par[0] < vc->vc_par[1] &&
1958 vc->vc_par[1] <= vc->vc_rows) {
1959 vc->vc_top = vc->vc_par[0] - 1;
1960 vc->vc_bottom = vc->vc_par[1];
1961 gotoxay(vc, 0, 0);
1962 }
1963 return;
1964 case 's':
1965 save_cur(vc);
1966 return;
1967 case 'u':
1968 restore_cur(vc);
1969 return;
1970 case 'X':
1971 csi_X(vc, vc->vc_par[0]);
1972 return;
1973 case '@':
1974 csi_at(vc, vc->vc_par[0]);
1975 return;
1976 case ']': /* setterm functions */
1977 setterm_command(vc);
1978 return;
1979 }
1980 return;
1981 case ESpercent:
1982 vc->vc_state = ESnormal;
1983 switch (c) {
1984 case '@': /* defined in ISO 2022 */
1985 vc->vc_utf = 0;
1986 return;
1987 case 'G': /* prelim official escape code */
1988 case '8': /* retained for compatibility */
1989 vc->vc_utf = 1;
1990 return;
1991 }
1992 return;
1993 case ESfunckey:
1994 vc->vc_state = ESnormal;
1995 return;
1996 case EShash:
1997 vc->vc_state = ESnormal;
1998 if (c == '8') {
1999 /* DEC screen alignment test. kludge :-) */
2000 vc->vc_video_erase_char =
2001 (vc->vc_video_erase_char & 0xff00) | 'E';
2002 csi_J(vc, 2);
2003 vc->vc_video_erase_char =
2004 (vc->vc_video_erase_char & 0xff00) | ' ';
2005 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
2006 }
2007 return;
2008 case ESsetG0:
2009 if (c == '0')
2010 vc->vc_G0_charset = GRAF_MAP;
2011 else if (c == 'B')
2012 vc->vc_G0_charset = LAT1_MAP;
2013 else if (c == 'U')
2014 vc->vc_G0_charset = IBMPC_MAP;
2015 else if (c == 'K')
2016 vc->vc_G0_charset = USER_MAP;
2017 if (vc->vc_charset == 0)
2018 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
2019 vc->vc_state = ESnormal;
2020 return;
2021 case ESsetG1:
2022 if (c == '0')
2023 vc->vc_G1_charset = GRAF_MAP;
2024 else if (c == 'B')
2025 vc->vc_G1_charset = LAT1_MAP;
2026 else if (c == 'U')
2027 vc->vc_G1_charset = IBMPC_MAP;
2028 else if (c == 'K')
2029 vc->vc_G1_charset = USER_MAP;
2030 if (vc->vc_charset == 1)
2031 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
2032 vc->vc_state = ESnormal;
2033 return;
2034 default:
2035 vc->vc_state = ESnormal;
2036 }
2037}
2038
2039/* This is a temporary buffer used to prepare a tty console write
2040 * so that we can easily avoid touching user space while holding the
2041 * console spinlock. It is allocated in con_init and is shared by
2042 * this code and the vc_screen read/write tty calls.
2043 *
2044 * We have to allocate this statically in the kernel data section
2045 * since console_init (and thus con_init) are called before any
2046 * kernel memory allocation is available.
2047 */
2048char con_buf[CON_BUF_SIZE];
c831c338 2049DEFINE_MUTEX(con_buf_mtx);
1da177e4 2050
2f1a2ccb 2051/* is_double_width() is based on the wcwidth() implementation by
1ed8a2b3 2052 * Markus Kuhn -- 2007-05-26 (Unicode 5.0)
2f1a2ccb
EK		 2053 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
2054 */
2055struct interval {
2056 uint32_t first;
2057 uint32_t last;
2058};
2059
2060static int bisearch(uint32_t ucs, const struct interval *table, int max)
2061{
2062 int min = 0;
2063 int mid;
2064
2065 if (ucs < table[0].first || ucs > table[max].last)
2066 return 0;
2067 while (max >= min) {
2068 mid = (min + max) / 2;
2069 if (ucs > table[mid].last)
2070 min = mid + 1;
2071 else if (ucs < table[mid].first)
2072 max = mid - 1;
2073 else
2074 return 1;
2075 }
2076 return 0;
2077}
2078
2079static int is_double_width(uint32_t ucs)
2080{
2081 static const struct interval double_width[] = {
2082 { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E },
2083 { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF },
1ed8a2b3
EK		 2084 { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 },
2085 { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD }
2f1a2ccb 2086 };
0f11541b 2087 return bisearch(ucs, double_width, ARRAY_SIZE(double_width) - 1);
2f1a2ccb
EK		 2088}
2089
1da177e4
LT		 2090/* acquires console_sem */
2091static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2092{
2093#ifdef VT_BUF_VRAM_ONLY
2094#define FLUSH do { } while(0);
2095#else
2096#define FLUSH if (draw_x >= 0) { \
2097 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
2098 draw_x = -1; \
2099 }
2100#endif
2101
2102 int c, tc, ok, n = 0, draw_x = -1;
2103 unsigned int currcons;
2104 unsigned long draw_from = 0, draw_to = 0;
2105 struct vc_data *vc;
2f1a2ccb 2106 unsigned char vc_attr;
0341a4d0 2107 struct vt_notifier_param param;
2f1a2ccb
EK		 2108 uint8_t rescan;
2109 uint8_t inverse;
2110 uint8_t width;
1da177e4
LT		 2111 u16 himask, charmask;
2112 const unsigned char *orig_buf = NULL;
2113 int orig_count;
2114
2115 if (in_interrupt())
2116 return count;
2117
2118 might_sleep();
2119
2120 acquire_console_sem();
2121 vc = tty->driver_data;
2122 if (vc == NULL) {
2123 printk(KERN_ERR "vt: argh, driver_data is NULL !\n");
2124 release_console_sem();
2125 return 0;
2126 }
2127
2128 currcons = vc->vc_num;
2129 if (!vc_cons_allocated(currcons)) {
2130 /* could this happen? */
2131 static int error = 0;
2132 if (!error) {
2133 error = 1;
2134 printk("con_write: tty %d not allocated\n", currcons+1);
2135 }
2136 release_console_sem();
2137 return 0;
2138 }
1da177e4
LT		 2139 orig_buf = buf;
2140 orig_count = count;
2141
1da177e4
LT		 2142 himask = vc->vc_hi_font_mask;
2143 charmask = himask ? 0x1ff : 0xff;
2144
2145 /* undraw cursor first */
2146 if (IS_FG(vc))
2147 hide_cursor(vc);
2148
0341a4d0
KD		 2149 param.vc = vc;
2150
1da177e4
LT		 2151 while (!tty->stopped && count) {
2152 int orig = *buf;
2153 c = orig;
2154 buf++;
2155 n++;
2156 count--;
2f1a2ccb
EK		 2157 rescan = 0;
2158 inverse = 0;
2159 width = 1;
1da177e4
LT		 2160
2161 /* Do no translation at all in control states */
2162 if (vc->vc_state != ESnormal) {
2163 tc = c;
d4328b40 2164 } else if (vc->vc_utf && !vc->vc_disp_ctrl) {
2f1a2ccb
EK		 2165 /* Combine UTF-8 into Unicode in vc_utf_char.
2166 * vc_utf_count is the number of continuation bytes still
2167 * expected to arrive.
2168 * vc_npar is the number of continuation bytes arrived so
2169 * far
2170 */
d4328b40 2171rescan_last_byte:
2f1a2ccb
EK		 2172 if ((c & 0xc0) == 0x80) {
2173 /* Continuation byte received */
2174 static const uint32_t utf8_length_changes[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff };
d4328b40 2175 if (vc->vc_utf_count) {
2f1a2ccb
EK		 2176 vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f);
2177 vc->vc_npar++;
2178 if (--vc->vc_utf_count) {
2179 /* Still need some bytes */
1da177e4 2180 continue;
2f1a2ccb
EK		 2181 }
2182 /* Got a whole character */
2183 c = vc->vc_utf_char;
2184 /* Reject overlong sequences */
2185 if (c <= utf8_length_changes[vc->vc_npar - 1] ||
2186 c > utf8_length_changes[vc->vc_npar])
2187 c = 0xfffd;
2188 } else {
2189 /* Unexpected continuation byte */
2190 vc->vc_utf_count = 0;
2191 c = 0xfffd;
2192 }
1da177e4 2193 } else {
2f1a2ccb
EK		 2194 /* Single ASCII byte or first byte of a sequence received */
2195 if (vc->vc_utf_count) {
2196 /* Continuation byte expected */
2197 rescan = 1;
2198 vc->vc_utf_count = 0;
2199 c = 0xfffd;
2200 } else if (c > 0x7f) {
2201 /* First byte of a multibyte sequence received */
2202 vc->vc_npar = 0;
2203 if ((c & 0xe0) == 0xc0) {
2204 vc->vc_utf_count = 1;
2205 vc->vc_utf_char = (c & 0x1f);
2206 } else if ((c & 0xf0) == 0xe0) {
2207 vc->vc_utf_count = 2;
2208 vc->vc_utf_char = (c & 0x0f);
2209 } else if ((c & 0xf8) == 0xf0) {
2210 vc->vc_utf_count = 3;
2211 vc->vc_utf_char = (c & 0x07);
2212 } else if ((c & 0xfc) == 0xf8) {
2213 vc->vc_utf_count = 4;
2214 vc->vc_utf_char = (c & 0x03);
2215 } else if ((c & 0xfe) == 0xfc) {
2216 vc->vc_utf_count = 5;
2217 vc->vc_utf_char = (c & 0x01);
2218 } else {
2219 /* 254 and 255 are invalid */
2220 c = 0xfffd;
2221 }
2222 if (vc->vc_utf_count) {
2223 /* Still need some bytes */
2224 continue;
2225 }
2226 }
2227 /* Nothing to do if an ASCII byte was received */
1da177e4 2228 }
2f1a2ccb
EK		 2229 /* End of UTF-8 decoding. */
2230 /* c is the received character, or U+FFFD for invalid sequences. */
2231 /* Replace invalid Unicode code points with U+FFFD too */
2232 if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff)
2233 c = 0xfffd;
2234 tc = c;
d4328b40 2235 } else { /* no utf or alternate charset mode */
a29ccf6f 2236 tc = vc_translate(vc, c);
1da177e4
LT		 2237 }
2238
0341a4d0
KD		 2239 param.c = tc;
2240 if (atomic_notifier_call_chain(&vt_notifier_list, VT_PREWRITE,
2241 &param) == NOTIFY_STOP)
2242 continue;
2243
1da177e4
LT		 2244 /* If the original code was a control character we
2245 * only allow a glyph to be displayed if the code is
2246 * not normally used (such as for cursor movement) or
2247 * if the disp_ctrl mode has been explicitly enabled.
2248 * Certain characters (as given by the CTRL_ALWAYS
2249 * bitmap) are always displayed as control characters,
2250 * as the console would be pretty useless without
2251 * them; to display an arbitrary font position use the
2252 * direct-to-font zone in UTF-8 mode.
2253 */
2254 ok = tc && (c >= 32 ||
d4328b40
AT		 2255 !(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 :
2256 vc->vc_utf || ((CTRL_ACTION >> c) & 1)))
1da177e4
LT		 2257 && (c != 127 || vc->vc_disp_ctrl)
2258 && (c != 128+27);
2259
2260 if (vc->vc_state == ESnormal && ok) {
2f1a2ccb
EK		 2261 if (vc->vc_utf && !vc->vc_disp_ctrl) {
2262 if (is_double_width(c))
2263 width = 2;
2264 }
1da177e4
LT		 2265 /* Now try to find out how to display it */
2266 tc = conv_uni_to_pc(vc, tc);
d4328b40 2267 if (tc & ~charmask) {
2f1a2ccb
EK		 2268 if (tc == -1 || tc == -2) {
2269 continue; /* nothing to display */
2270 }
2271 /* Glyph not found */
1ed8a2b3 2272 if ((!(vc->vc_utf && !vc->vc_disp_ctrl) || c < 128) && !(c & ~charmask)) {
2f1a2ccb 2273 /* In legacy mode use the glyph we get by a 1:1 mapping.
1ed8a2b3
EK		 2274 This would make absolutely no sense with Unicode in mind,
2275 but do this for ASCII characters since a font may lack
2276 Unicode mapping info and we don't want to end up with
2277 having question marks only. */
2f1a2ccb
EK		 2278 tc = c;
2279 } else {
2280 /* Display U+FFFD. If it's not found, display an inverse question mark. */
2281 tc = conv_uni_to_pc(vc, 0xfffd);
2282 if (tc < 0) {
2283 inverse = 1;
2284 tc = conv_uni_to_pc(vc, '?');
2285 if (tc < 0) tc = '?';
2286 }
2287 }
d4328b40 2288 }
1da177e4 2289
2f1a2ccb
EK		 2290 if (!inverse) {
2291 vc_attr = vc->vc_attr;
1da177e4 2292 } else {
2f1a2ccb
EK		 2293 /* invert vc_attr */
2294 if (!vc->vc_can_do_color) {
2295 vc_attr = (vc->vc_attr) ^ 0x08;
2296 } else if (vc->vc_hi_font_mask == 0x100) {
2297 vc_attr = ((vc->vc_attr) & 0x11) | (((vc->vc_attr) & 0xe0) >> 4) | (((vc->vc_attr) & 0x0e) << 4);
2298 } else {
2299 vc_attr = ((vc->vc_attr) & 0x88) | (((vc->vc_attr) & 0x70) >> 4) | (((vc->vc_attr) & 0x07) << 4);
2300 }
1ed8a2b3 2301 FLUSH
1da177e4 2302 }
2f1a2ccb
EK		 2303
2304 while (1) {
2305 if (vc->vc_need_wrap || vc->vc_decim)
2306 FLUSH
2307 if (vc->vc_need_wrap) {
2308 cr(vc);
2309 lf(vc);
2310 }
2311 if (vc->vc_decim)
2312 insert_char(vc, 1);
2313 scr_writew(himask ?
2314 ((vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) :
2315 (vc_attr << 8) + tc,
2316 (u16 *) vc->vc_pos);
2317 if (DO_UPDATE(vc) && draw_x < 0) {
2318 draw_x = vc->vc_x;
2319 draw_from = vc->vc_pos;
2320 }
2321 if (vc->vc_x == vc->vc_cols - 1) {
2322 vc->vc_need_wrap = vc->vc_decawm;
2323 draw_to = vc->vc_pos + 2;
2324 } else {
2325 vc->vc_x++;
2326 draw_to = (vc->vc_pos += 2);
d4328b40 2327 }
2f1a2ccb
EK		 2328
2329 if (!--width) break;
2330
2331 tc = conv_uni_to_pc(vc, ' '); /* A space is printed in the second column */
2332 if (tc < 0) tc = ' ';
2333 }
b293d758 2334 notify_write(vc, c);
2f1a2ccb 2335
1ed8a2b3
EK		 2336 if (inverse) {
2337 FLUSH
2338 }
2339
2f1a2ccb
EK		 2340 if (rescan) {
2341 rescan = 0;
2342 inverse = 0;
2343 width = 1;
d4328b40
AT		 2344 c = orig;
2345 goto rescan_last_byte;
2346 }
1da177e4
LT		 2347 continue;
2348 }
2349 FLUSH
2350 do_con_trol(tty, vc, orig);
2351 }
2352 FLUSH
2353 console_conditional_schedule();
2354 release_console_sem();
2355
2356out:
b293d758 2357 notify_update(vc);
1da177e4
LT		 2358 return n;
2359#undef FLUSH
2360}
2361
2362/*
2363 * This is the console switching callback.
2364 *
2365 * Doing console switching in a process context allows
2366 * us to do the switches asynchronously (needed when we want
2367 * to switch due to a keyboard interrupt). Synchronization
2368 * with other console code and prevention of re-entrancy is
2369 * ensured with console_sem.
2370 */
65f27f38 2371static void console_callback(struct work_struct *ignored)
1da177e4
LT		 2372{
2373 acquire_console_sem();
2374
2375 if (want_console >= 0) {
2376 if (want_console != fg_console &&
2377 vc_cons_allocated(want_console)) {
2378 hide_cursor(vc_cons[fg_console].d);
2379 change_console(vc_cons[want_console].d);
2380 /* we only changed when the console had already
2381 been allocated - a new console is not created
2382 in an interrupt routine */
2383 }
2384 want_console = -1;
2385 }
2386 if (do_poke_blanked_console) { /* do not unblank for a LED change */
2387 do_poke_blanked_console = 0;
2388 poke_blanked_console();
2389 }
2390 if (scrollback_delta) {
2391 struct vc_data *vc = vc_cons[fg_console].d;
2392 clear_selection();
2393 if (vc->vc_mode == KD_TEXT)
2394 vc->vc_sw->con_scrolldelta(vc, scrollback_delta);
2395 scrollback_delta = 0;
2396 }
2397 if (blank_timer_expired) {
2398 do_blank_screen(0);
2399 blank_timer_expired = 0;
2400 }
b293d758 2401 notify_update(vc_cons[fg_console].d);
1da177e4
LT		 2402
2403 release_console_sem();
2404}
2405
b257bc05 2406int set_console(int nr)
1da177e4 2407{
b257bc05
AJ		 2408 struct vc_data *vc = vc_cons[fg_console].d;
2409
2410 if (!vc_cons_allocated(nr) || vt_dont_switch ||
2411 (vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) {
2412
2413 /*
2414 * Console switch will fail in console_callback() or
2415 * change_console() so there is no point scheduling
2416 * the callback
2417 *
2418 * Existing set_console() users don't check the return
2419 * value so this shouldn't break anything
2420 */
2421 return -EINVAL;
2422 }
2423
1da177e4
LT		 2424 want_console = nr;
2425 schedule_console_callback();
b257bc05
AJ		 2426
2427 return 0;
1da177e4
LT		 2428}
2429
2430struct tty_driver *console_driver;
2431
2432#ifdef CONFIG_VT_CONSOLE
2433
2434/*
2435 * Console on virtual terminal
2436 *
2437 * The console must be locked when we get here.
2438 */
2439
2440static void vt_console_print(struct console *co, const char *b, unsigned count)
2441{
2442 struct vc_data *vc = vc_cons[fg_console].d;
2443 unsigned char c;
b0940003 2444 static DEFINE_SPINLOCK(printing_lock);
1da177e4
LT		 2445 const ushort *start;
2446 ushort cnt = 0;
2447 ushort myx;
2448
2449 /* console busy or not yet initialized */
b0940003
NP		 2450 if (!printable)
2451 return;
2452 if (!spin_trylock(&printing_lock))
1da177e4
LT		 2453 return;
2454
2455 if (kmsg_redirect && vc_cons_allocated(kmsg_redirect - 1))
2456 vc = vc_cons[kmsg_redirect - 1].d;
2457
2458 /* read `x' only after setting currcons properly (otherwise
2459 the `x' macro will read the x of the foreground console). */
2460 myx = vc->vc_x;
2461
2462 if (!vc_cons_allocated(fg_console)) {
2463 /* impossible */
2464 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2465 goto quit;
2466 }
2467
2468 if (vc->vc_mode != KD_TEXT)
2469 goto quit;
2470
2471 /* undraw cursor first */
2472 if (IS_FG(vc))
2473 hide_cursor(vc);
2474
2475 start = (ushort *)vc->vc_pos;
2476
2477 /* Contrived structure to try to emulate original need_wrap behaviour
2478 * Problems caused when we have need_wrap set on '\n' character */
2479 while (count--) {
2480 c = *b++;
2481 if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) {
2482 if (cnt > 0) {
2483 if (CON_IS_VISIBLE(vc))
2484 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2485 vc->vc_x += cnt;
2486 if (vc->vc_need_wrap)
2487 vc->vc_x--;
2488 cnt = 0;
2489 }
2490 if (c == 8) { /* backspace */
2491 bs(vc);
2492 start = (ushort *)vc->vc_pos;
2493 myx = vc->vc_x;
2494 continue;
2495 }
2496 if (c != 13)
2497 lf(vc);
2498 cr(vc);
2499 start = (ushort *)vc->vc_pos;
2500 myx = vc->vc_x;
2501 if (c == 10 || c == 13)
2502 continue;
2503 }
2504 scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos);
b293d758 2505 notify_write(vc, c);
1da177e4
LT		 2506 cnt++;
2507 if (myx == vc->vc_cols - 1) {
2508 vc->vc_need_wrap = 1;
2509 continue;
2510 }
2511 vc->vc_pos += 2;
2512 myx++;
2513 }
2514 if (cnt > 0) {
2515 if (CON_IS_VISIBLE(vc))
2516 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2517 vc->vc_x += cnt;
2518 if (vc->vc_x == vc->vc_cols) {
2519 vc->vc_x--;
2520 vc->vc_need_wrap = 1;
2521 }
2522 }
2523 set_cursor(vc);
b293d758 2524 notify_update(vc);
1da177e4
LT		 2525
2526quit:
b0940003 2527 spin_unlock(&printing_lock);
1da177e4
LT		 2528}
2529
2530static struct tty_driver *vt_console_device(struct console *c, int *index)
2531{
2532 *index = c->index ? c->index-1 : fg_console;
2533 return console_driver;
2534}
2535
2536static struct console vt_console_driver = {
2537 .name = "tty",
2538 .write = vt_console_print,
2539 .device = vt_console_device,
2540 .unblank = unblank_screen,
2541 .flags = CON_PRINTBUFFER,
2542 .index = -1,
2543};
2544#endif
2545
2546/*
2547 * Handling of Linux-specific VC ioctls
2548 */
2549
2550/*
2551 * Generally a bit racy with respect to console_sem().
2552 *
2553 * There are some functions which don't need it.
2554 *
2555 * There are some functions which can sleep for arbitrary periods
2556 * (paste_selection) but we don't need the lock there anyway.
2557 *
2558 * set_selection has locking, and definitely needs it
2559 */
2560
2561int tioclinux(struct tty_struct *tty, unsigned long arg)
2562{
2563 char type, data;
2564 char __user *p = (char __user *)arg;
2565 int lines;
2566 int ret;
2567
1da177e4
LT		 2568 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN))
2569 return -EPERM;
2570 if (get_user(type, p))
2571 return -EFAULT;
2572 ret = 0;
04f378b1
AC		 2573
2574 lock_kernel();
2575
1da177e4
LT		 2576 switch (type)
2577 {
2578 case TIOCL_SETSEL:
2579 acquire_console_sem();
2580 ret = set_selection((struct tiocl_selection __user *)(p+1), tty);
2581 release_console_sem();
2582 break;
2583 case TIOCL_PASTESEL:
2584 ret = paste_selection(tty);
2585 break;
2586 case TIOCL_UNBLANKSCREEN:
2d237c63 2587 acquire_console_sem();
1da177e4 2588 unblank_screen();
2d237c63 2589 release_console_sem();
1da177e4
LT		 2590 break;
2591 case TIOCL_SELLOADLUT:
2592 ret = sel_loadlut(p);
2593 break;
2594 case TIOCL_GETSHIFTSTATE:
04f378b1 2595
1da177e4
LT		 2596 /*
2597 * Make it possible to react to Shift+Mousebutton.
2598 * Note that 'shift_state' is an undocumented
2599 * kernel-internal variable; programs not closely
2600 * related to the kernel should not use this.
2601 */
2602 data = shift_state;
2603 ret = __put_user(data, p);
2604 break;
2605 case TIOCL_GETMOUSEREPORTING:
2606 data = mouse_reporting();
2607 ret = __put_user(data, p);
2608 break;
2609 case TIOCL_SETVESABLANK:
403aac96 2610 ret = set_vesa_blanking(p);
1da177e4 2611 break;
0ca07731
RW		 2612 case TIOCL_GETKMSGREDIRECT:
2613 data = kmsg_redirect;
2614 ret = __put_user(data, p);
2615 break;
1da177e4
LT		 2616 case TIOCL_SETKMSGREDIRECT:
2617 if (!capable(CAP_SYS_ADMIN)) {
2618 ret = -EPERM;
2619 } else {
2620 if (get_user(data, p+1))
2621 ret = -EFAULT;
2622 else
2623 kmsg_redirect = data;
2624 }
2625 break;
2626 case TIOCL_GETFGCONSOLE:
2627 ret = fg_console;
2628 break;
2629 case TIOCL_SCROLLCONSOLE:
2630 if (get_user(lines, (s32 __user *)(p+4))) {
2631 ret = -EFAULT;
2632 } else {
2633 scrollfront(vc_cons[fg_console].d, lines);
2634 ret = 0;
2635 }
2636 break;
2637 case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
2d237c63 2638 acquire_console_sem();
1da177e4
LT		 2639 ignore_poke = 1;
2640 do_blank_screen(0);
2d237c63 2641 release_console_sem();
1da177e4
LT		 2642 break;
2643 case TIOCL_BLANKEDSCREEN:
2644 ret = console_blanked;
2645 break;
2646 default:
2647 ret = -EINVAL;
2648 break;
2649 }
04f378b1 2650 unlock_kernel();
1da177e4
LT		 2651 return ret;
2652}
2653
2654/*
2655 * /dev/ttyN handling
2656 */
2657
2658static int con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2659{
2660 int retval;
2661
2662 retval = do_con_write(tty, buf, count);
2663 con_flush_chars(tty);
2664
2665 return retval;
2666}
2667
5d19f546 2668static int con_put_char(struct tty_struct *tty, unsigned char ch)
1da177e4
LT		 2669{
2670 if (in_interrupt())
5d19f546
AC		 2671 return 0; /* n_r3964 calls put_char() from interrupt context */
2672 return do_con_write(tty, &ch, 1);
1da177e4
LT		 2673}
2674
2675static int con_write_room(struct tty_struct *tty)
2676{
2677 if (tty->stopped)
2678 return 0;
2679 return 4096; /* No limit, really; we're not buffering */
2680}
2681
2682static int con_chars_in_buffer(struct tty_struct *tty)
2683{
2684 return 0; /* we're not buffering */
2685}
2686
2687/*
2688 * con_throttle and con_unthrottle are only used for
2689 * paste_selection(), which has to stuff in a large number of
2690 * characters...
2691 */
2692static void con_throttle(struct tty_struct *tty)
2693{
2694}
2695
2696static void con_unthrottle(struct tty_struct *tty)
2697{
2698 struct vc_data *vc = tty->driver_data;
2699
2700 wake_up_interruptible(&vc->paste_wait);
2701}
2702
2703/*
2704 * Turn the Scroll-Lock LED on when the tty is stopped
2705 */
2706static void con_stop(struct tty_struct *tty)
2707{
2708 int console_num;
2709 if (!tty)
2710 return;
2711 console_num = tty->index;
2712 if (!vc_cons_allocated(console_num))
2713 return;
2714 set_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2715 set_leds();
2716}
2717
2718/*
2719 * Turn the Scroll-Lock LED off when the console is started
2720 */
2721static void con_start(struct tty_struct *tty)
2722{
2723 int console_num;
2724 if (!tty)
2725 return;
2726 console_num = tty->index;
2727 if (!vc_cons_allocated(console_num))
2728 return;
2729 clr_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2730 set_leds();
2731}
2732
2733static void con_flush_chars(struct tty_struct *tty)
2734{
2735 struct vc_data *vc;
2736
2737 if (in_interrupt()) /* from flush_to_ldisc */
2738 return;
2739
2740 /* if we race with con_close(), vt may be null */
2741 acquire_console_sem();
2742 vc = tty->driver_data;
2743 if (vc)
2744 set_cursor(vc);
2745 release_console_sem();
2746}
2747
2748/*
2749 * Allocate the console screen memory.
2750 */
2751static int con_open(struct tty_struct *tty, struct file *filp)
2752{
2753 unsigned int currcons = tty->index;
2754 int ret = 0;
2755
2756 acquire_console_sem();
f786648b 2757 if (tty->driver_data == NULL) {
1da177e4
LT		 2758 ret = vc_allocate(currcons);
2759 if (ret == 0) {
2760 struct vc_data *vc = vc_cons[currcons].d;
feebed65
AC		 2761
2762 /* Still being freed */
2763 if (vc->vc_tty) {
2764 release_console_sem();
2765 return -ERESTARTSYS;
2766 }
1da177e4
LT		 2767 tty->driver_data = vc;
2768 vc->vc_tty = tty;
2769
2770 if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
2771 tty->winsize.ws_row = vc_cons[currcons].d->vc_rows;
2772 tty->winsize.ws_col = vc_cons[currcons].d->vc_cols;
2773 }
c1236d31
ST		 2774 if (vc->vc_utf)
2775 tty->termios->c_iflag |= IUTF8;
2776 else
2777 tty->termios->c_iflag &= ~IUTF8;
d09d7ddf 2778 vcs_make_sysfs(tty);
e0426e6a 2779 release_console_sem();
1da177e4
LT		 2780 return ret;
2781 }
2782 }
2783 release_console_sem();
2784 return ret;
2785}
2786
2787/*
70522e12 2788 * We take tty_mutex in here to prevent another thread from coming in via init_dev
1da177e4
LT		 2789 * and taking a ref against the tty while we're in the process of forgetting
2790 * about it and cleaning things up.
2791 *
d09d7ddf 2792 * This is because vcs_remove_sysfs() can sleep and will drop the BKL.
1da177e4
LT		 2793 */
2794static void con_close(struct tty_struct *tty, struct file *filp)
2795{
feebed65
AC		 2796 /* Nothing to do - we defer to shutdown */
2797}
1da177e4 2798
feebed65
AC		 2799static void con_shutdown(struct tty_struct *tty)
2800{
2801 struct vc_data *vc = tty->driver_data;
2802 BUG_ON(vc == NULL);
2803 acquire_console_sem();
2804 vc->vc_tty = NULL;
2805 vcs_remove_sysfs(tty);
1da177e4 2806 release_console_sem();
feebed65 2807 tty_shutdown(tty);
1da177e4
LT		 2808}
2809
fa6ce9ab
JE		 2810static int default_italic_color = 2; // green (ASCII)
2811static int default_underline_color = 3; // cyan (ASCII)
2812module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR);
2813module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR);
2814
1da177e4
LT		 2815static void vc_init(struct vc_data *vc, unsigned int rows,
2816 unsigned int cols, int do_clear)
2817{
2818 int j, k ;
2819
2820 vc->vc_cols = cols;
2821 vc->vc_rows = rows;
2822 vc->vc_size_row = cols << 1;
2823 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
2824
2825 set_origin(vc);
2826 vc->vc_pos = vc->vc_origin;
2827 reset_vc(vc);
2828 for (j=k=0; j<16; j++) {
2829 vc->vc_palette[k++] = default_red[j] ;
2830 vc->vc_palette[k++] = default_grn[j] ;
2831 vc->vc_palette[k++] = default_blu[j] ;
2832 }
2833 vc->vc_def_color = 0x07; /* white */
fa6ce9ab
JE		 2834 vc->vc_ulcolor = default_underline_color;
2835 vc->vc_itcolor = default_italic_color;
1da177e4
LT		 2836 vc->vc_halfcolor = 0x08; /* grey */
2837 init_waitqueue_head(&vc->paste_wait);
2838 reset_terminal(vc, do_clear);
2839}
2840
2841/*
2842 * This routine initializes console interrupts, and does nothing
2843 * else. If you want the screen to clear, call tty_write with
2844 * the appropriate escape-sequence.
2845 */
2846
2847static int __init con_init(void)
2848{
2849 const char *display_desc = NULL;
2850 struct vc_data *vc;
3e795de7 2851 unsigned int currcons = 0, i;
1da177e4
LT		 2852
2853 acquire_console_sem();
2854
2855 if (conswitchp)
2856 display_desc = conswitchp->con_startup();
2857 if (!display_desc) {
2858 fg_console = 0;
2859 release_console_sem();
2860 return 0;
2861 }
2862
3e795de7
AD		 2863 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2864 struct con_driver *con_driver = &registered_con_driver[i];
2865
2866 if (con_driver->con == NULL) {
2867 con_driver->con = conswitchp;
2868 con_driver->desc = display_desc;
2869 con_driver->flag = CON_DRIVER_FLAG_INIT;
2870 con_driver->first = 0;
2871 con_driver->last = MAX_NR_CONSOLES - 1;
2872 break;
2873 }
2874 }
2875
2876 for (i = 0; i < MAX_NR_CONSOLES; i++)
2877 con_driver_map[i] = conswitchp;
2878
1da177e4
LT		 2879 if (blankinterval) {
2880 blank_state = blank_normal_wait;
2881 mod_timer(&console_timer, jiffies + blankinterval);
2882 }
2883
2884 /*
2885 * kmalloc is not running yet - we use the bootmem allocator.
2886 */
2887 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) {
2888 vc_cons[currcons].d = vc = alloc_bootmem(sizeof(struct vc_data));
7f1f86a0 2889 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
1da177e4
LT		 2890 visual_init(vc, currcons, 1);
2891 vc->vc_screenbuf = (unsigned short *)alloc_bootmem(vc->vc_screenbuf_size);
2892 vc->vc_kmalloced = 0;
2893 vc_init(vc, vc->vc_rows, vc->vc_cols,
2894 currcons || !vc->vc_sw->con_save_screen);
2895 }
2896 currcons = fg_console = 0;
2897 master_display_fg = vc = vc_cons[currcons].d;
2898 set_origin(vc);
2899 save_screen(vc);
2900 gotoxy(vc, vc->vc_x, vc->vc_y);
2901 csi_J(vc, 0);
2902 update_screen(vc);
2903 printk("Console: %s %s %dx%d",
2904 vc->vc_can_do_color ? "colour" : "mono",
2905 display_desc, vc->vc_cols, vc->vc_rows);
2906 printable = 1;
2907 printk("\n");
2908
2909 release_console_sem();
2910
2911#ifdef CONFIG_VT_CONSOLE
2912 register_console(&vt_console_driver);
2913#endif
2914 return 0;
2915}
2916console_initcall(con_init);
2917
b68e31d0 2918static const struct tty_operations con_ops = {
1da177e4
LT		 2919 .open = con_open,
2920 .close = con_close,
2921 .write = con_write,
2922 .write_room = con_write_room,
2923 .put_char = con_put_char,
2924 .flush_chars = con_flush_chars,
2925 .chars_in_buffer = con_chars_in_buffer,
2926 .ioctl = vt_ioctl,
2927 .stop = con_stop,
2928 .start = con_start,
2929 .throttle = con_throttle,
2930 .unthrottle = con_unthrottle,
8c9a9dd0 2931 .resize = vt_resize,
feebed65 2932 .shutdown = con_shutdown
1da177e4
LT		 2933};
2934
2935int __init vty_init(void)
2936{
2937 vcs_init();
2938
2939 console_driver = alloc_tty_driver(MAX_NR_CONSOLES);
2940 if (!console_driver)
2941 panic("Couldn't allocate console driver\n");
2942 console_driver->owner = THIS_MODULE;
1da177e4
LT		 2943 console_driver->name = "tty";
2944 console_driver->name_base = 1;
2945 console_driver->major = TTY_MAJOR;
2946 console_driver->minor_start = 1;
2947 console_driver->type = TTY_DRIVER_TYPE_CONSOLE;
2948 console_driver->init_termios = tty_std_termios;
c1236d31
ST		 2949 if (default_utf8)
2950 console_driver->init_termios.c_iflag |= IUTF8;
1da177e4
LT		 2951 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS;
2952 tty_set_operations(console_driver, &con_ops);
2953 if (tty_register_driver(console_driver))
2954 panic("Couldn't register console driver\n");
2955
2956 kbd_init();
2957 console_map_init();
2958#ifdef CONFIG_PROM_CONSOLE
2959 prom_con_init();
2960#endif
2961#ifdef CONFIG_MDA_CONSOLE
2962 mda_console_init();
2963#endif
2964 return 0;
2965}
2966
2967#ifndef VT_SINGLE_DRIVER
6db4063c
AD		 2968#include <linux/device.h>
2969
2970static struct class *vtconsole_class;
2971
b7269dd2
JB		 2972static int bind_con_driver(const struct consw *csw, int first, int last,
2973 int deflt)
1da177e4 2974{
3e795de7
AD		 2975 struct module *owner = csw->owner;
2976 const char *desc = NULL;
2977 struct con_driver *con_driver;
2978 int i, j = -1, k = -1, retval = -ENODEV;
1da177e4 2979
1da177e4
LT		 2980 if (!try_module_get(owner))
2981 return -ENODEV;
2982
1c8ce271 2983 acquire_console_sem();
1c8ce271 2984
3e795de7
AD		 2985 /* check if driver is registered */
2986 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2987 con_driver = &registered_con_driver[i];
2988
2989 if (con_driver->con == csw) {
2990 desc = con_driver->desc;
2991 retval = 0;
2992 break;
2993 }
2994 }
2995
2996 if (retval)
2997 goto err;
2998
2999 if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) {
3000 csw->con_startup();
3001 con_driver->flag |= CON_DRIVER_FLAG_INIT;
1da177e4 3002 }
1c8ce271 3003
1da177e4
LT		 3004 if (deflt) {
3005 if (conswitchp)
3006 module_put(conswitchp->owner);
1c8ce271 3007
1da177e4
LT		 3008 __module_get(owner);
3009 conswitchp = csw;
3010 }
3011
3e795de7
AD		 3012 first = max(first, con_driver->first);
3013 last = min(last, con_driver->last);
3014
1da177e4
LT		 3015 for (i = first; i <= last; i++) {
3016 int old_was_color;
3017 struct vc_data *vc = vc_cons[i].d;
3018
3019 if (con_driver_map[i])
3020 module_put(con_driver_map[i]->owner);
3021 __module_get(owner);
3022 con_driver_map[i] = csw;
3023
3024 if (!vc || !vc->vc_sw)
3025 continue;
3026
3027 j = i;
1c8ce271 3028
4ee1acce
DH		 3029 if (CON_IS_VISIBLE(vc)) {
3030 k = i;
1da177e4 3031 save_screen(vc);
4ee1acce
DH		 3032 }
3033
1da177e4
LT		 3034 old_was_color = vc->vc_can_do_color;
3035 vc->vc_sw->con_deinit(vc);
3036 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
1da177e4 3037 visual_init(vc, i, 0);
1c8ce271 3038 set_origin(vc);
1da177e4
LT		 3039 update_attr(vc);
3040
3041 /* If the console changed between mono <-> color, then
3042 * the attributes in the screenbuf will be wrong. The
3043 * following resets all attributes to something sane.
3044 */
3045 if (old_was_color != vc->vc_can_do_color)
3046 clear_buffer_attributes(vc);
1da177e4 3047 }
4ee1acce 3048
1da177e4
LT		 3049 printk("Console: switching ");
3050 if (!deflt)
3051 printk("consoles %d-%d ", first+1, last+1);
4ee1acce
DH		 3052 if (j >= 0) {
3053 struct vc_data *vc = vc_cons[j].d;
3054
1da177e4 3055 printk("to %s %s %dx%d\n",
4ee1acce
DH		 3056 vc->vc_can_do_color ? "colour" : "mono",
3057 desc, vc->vc_cols, vc->vc_rows);
3058
3059 if (k >= 0) {
3060 vc = vc_cons[k].d;
3061 update_screen(vc);
3062 }
3063 } else
1da177e4
LT		 3064 printk("to %s\n", desc);
3065
3e795de7
AD		 3066 retval = 0;
3067err:
1da177e4 3068 release_console_sem();
1da177e4 3069 module_put(owner);
3e795de7
AD		 3070 return retval;
3071};
1da177e4 3072
13ae6645
AD		 3073#ifdef CONFIG_VT_HW_CONSOLE_BINDING
3074static int con_is_graphics(const struct consw *csw, int first, int last)
3075{
3076 int i, retval = 0;
3077
3078 for (i = first; i <= last; i++) {
3079 struct vc_data *vc = vc_cons[i].d;
3080
3081 if (vc && vc->vc_mode == KD_GRAPHICS) {
3082 retval = 1;
3083 break;
3084 }
3085 }
3086
3087 return retval;
3088}
3089
b7269dd2
JB		 3090/**
3091 * unbind_con_driver - unbind a console driver
3092 * @csw: pointer to console driver to unregister
3093 * @first: first in range of consoles that @csw should be unbound from
3094 * @last: last in range of consoles that @csw should be unbound from
3095 * @deflt: should next bound console driver be default after @csw is unbound?
3096 *
3097 * To unbind a driver from all possible consoles, pass 0 as @first and
3098 * %MAX_NR_CONSOLES as @last.
3099 *
3100 * @deflt controls whether the console that ends up replacing @csw should be
3101 * the default console.
3102 *
3103 * RETURNS:
3104 * -ENODEV if @csw isn't a registered console driver or can't be unregistered
3105 * or 0 on success.
3106 */
623e71b0 3107int unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
1da177e4 3108{
3e795de7
AD		 3109 struct module *owner = csw->owner;
3110 const struct consw *defcsw = NULL;
3111 struct con_driver *con_driver = NULL, *con_back = NULL;
3112 int i, retval = -ENODEV;
1da177e4 3113
3e795de7
AD		 3114 if (!try_module_get(owner))
3115 return -ENODEV;
3116
3117 acquire_console_sem();
3118
3119 /* check if driver is registered and if it is unbindable */
3120 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3121 con_driver = &registered_con_driver[i];
3122
3123 if (con_driver->con == csw &&
6db4063c 3124 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3e795de7
AD		 3125 retval = 0;
3126 break;
3127 }
3128 }
3129
3130 if (retval) {
3131 release_console_sem();
3132 goto err;
3133 }
3134
6db4063c
AD		 3135 retval = -ENODEV;
3136
3e795de7
AD		 3137 /* check if backup driver exists */
3138 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3139 con_back = &registered_con_driver[i];
3140
3141 if (con_back->con &&
6db4063c 3142 !(con_back->flag & CON_DRIVER_FLAG_MODULE)) {
3e795de7
AD		 3143 defcsw = con_back->con;
3144 retval = 0;
3145 break;
3146 }
3147 }
3148
3149 if (retval) {
3150 release_console_sem();
3151 goto err;
3152 }
3153
3154 if (!con_is_bound(csw)) {
3155 release_console_sem();
3156 goto err;
3157 }
3158
3159 first = max(first, con_driver->first);
3160 last = min(last, con_driver->last);
3161
3162 for (i = first; i <= last; i++) {
1da177e4
LT		 3163 if (con_driver_map[i] == csw) {
3164 module_put(csw->owner);
3165 con_driver_map[i] = NULL;
3166 }
3e795de7
AD		 3167 }
3168
3169 if (!con_is_bound(defcsw)) {
6db4063c
AD		 3170 const struct consw *defconsw = conswitchp;
3171
3e795de7
AD		 3172 defcsw->con_startup();
3173 con_back->flag |= CON_DRIVER_FLAG_INIT;
6db4063c
AD		 3174 /*
3175 * vgacon may change the default driver to point
3176 * to dummycon, we restore it here...
3177 */
3178 conswitchp = defconsw;
3e795de7
AD		 3179 }
3180
3181 if (!con_is_bound(csw))
3182 con_driver->flag &= ~CON_DRIVER_FLAG_INIT;
3183
3184 release_console_sem();
6db4063c
AD		 3185 /* ignore return value, binding should not fail */
3186 bind_con_driver(defcsw, first, last, deflt);
3e795de7
AD		 3187err:
3188 module_put(owner);
3189 return retval;
3190
3191}
623e71b0 3192EXPORT_SYMBOL(unbind_con_driver);
3e795de7 3193
6db4063c
AD		 3194static int vt_bind(struct con_driver *con)
3195{
3196 const struct consw *defcsw = NULL, *csw = NULL;
3197 int i, more = 1, first = -1, last = -1, deflt = 0;
3198
3199 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3200 con_is_graphics(con->con, con->first, con->last))
3201 goto err;
3202
3203 csw = con->con;
3204
3205 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3206 struct con_driver *con = &registered_con_driver[i];
3207
3208 if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) {
3209 defcsw = con->con;
3210 break;
3211 }
3212 }
3213
3214 if (!defcsw)
3215 goto err;
3216
3217 while (more) {
3218 more = 0;
3219
3220 for (i = con->first; i <= con->last; i++) {
3221 if (con_driver_map[i] == defcsw) {
3222 if (first == -1)
3223 first = i;
3224 last = i;
3225 more = 1;
3226 } else if (first != -1)
3227 break;
3228 }
3229
3230 if (first == 0 && last == MAX_NR_CONSOLES -1)
3231 deflt = 1;
3232
3233 if (first != -1)
3234 bind_con_driver(csw, first, last, deflt);
3235
3236 first = -1;
3237 last = -1;
3238 deflt = 0;
3239 }
3240
3241err:
3242 return 0;
3243}
3244
3245static int vt_unbind(struct con_driver *con)
3246{
3247 const struct consw *csw = NULL;
3248 int i, more = 1, first = -1, last = -1, deflt = 0;
3249
3250 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3251 con_is_graphics(con->con, con->first, con->last))
3252 goto err;
3253
3254 csw = con->con;
3255
3256 while (more) {
3257 more = 0;
3258
3259 for (i = con->first; i <= con->last; i++) {
3260 if (con_driver_map[i] == csw) {
3261 if (first == -1)
3262 first = i;
3263 last = i;
3264 more = 1;
3265 } else if (first != -1)
3266 break;
3267 }
3268
3269 if (first == 0 && last == MAX_NR_CONSOLES -1)
3270 deflt = 1;
3271
3272 if (first != -1)
3273 unbind_con_driver(csw, first, last, deflt);
3274
3275 first = -1;
3276 last = -1;
3277 deflt = 0;
3278 }
3279
3280err:
3281 return 0;
3282}
13ae6645
AD		 3283#else
3284static inline int vt_bind(struct con_driver *con)
3285{
3286 return 0;
3287}
3288static inline int vt_unbind(struct con_driver *con)
3289{
3290 return 0;
3291}
3292#endif /* CONFIG_VT_HW_CONSOLE_BINDING */
6db4063c 3293
805952a8 3294static ssize_t store_bind(struct device *dev, struct device_attribute *attr,
6db4063c
AD		 3295 const char *buf, size_t count)
3296{
805952a8 3297 struct con_driver *con = dev_get_drvdata(dev);
6db4063c
AD		 3298 int bind = simple_strtoul(buf, NULL, 0);
3299
3300 if (bind)
3301 vt_bind(con);
3302 else
3303 vt_unbind(con);
3304
3305 return count;
3306}
3307
805952a8
GKH		 3308static ssize_t show_bind(struct device *dev, struct device_attribute *attr,
3309 char *buf)
6db4063c 3310{
805952a8 3311 struct con_driver *con = dev_get_drvdata(dev);
6db4063c
AD		 3312 int bind = con_is_bound(con->con);
3313
3314 return snprintf(buf, PAGE_SIZE, "%i\n", bind);
3315}
3316
805952a8
GKH		 3317static ssize_t show_name(struct device *dev, struct device_attribute *attr,
3318 char *buf)
6db4063c 3319{
805952a8 3320 struct con_driver *con = dev_get_drvdata(dev);
6db4063c
AD		 3321
3322 return snprintf(buf, PAGE_SIZE, "%s %s\n",
3323 (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)",
3324 con->desc);
3325
3326}
3327
805952a8 3328static struct device_attribute device_attrs[] = {
6db4063c
AD		 3329 __ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind),
3330 __ATTR(name, S_IRUGO, show_name, NULL),
3331};
3332
805952a8 3333static int vtconsole_init_device(struct con_driver *con)
6db4063c
AD		 3334{
3335 int i;
928e964f 3336 int error = 0;
6db4063c 3337
928e964f 3338 con->flag |= CON_DRIVER_FLAG_ATTR;
805952a8
GKH		 3339 dev_set_drvdata(con->dev, con);
3340 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3341 error = device_create_file(con->dev, &device_attrs[i]);
928e964f
AD		 3342 if (error)
3343 break;
3344 }
6db4063c 3345
928e964f
AD		 3346 if (error) {
3347 while (--i >= 0)
805952a8 3348 device_remove_file(con->dev, &device_attrs[i]);
928e964f
AD		 3349 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3350 }
3351
3352 return error;
6db4063c
AD		 3353}
3354
805952a8 3355static void vtconsole_deinit_device(struct con_driver *con)
6db4063c
AD		 3356{
3357 int i;
3358
928e964f 3359 if (con->flag & CON_DRIVER_FLAG_ATTR) {
805952a8
GKH		 3360 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3361 device_remove_file(con->dev, &device_attrs[i]);
928e964f
AD		 3362 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3363 }
6db4063c
AD		 3364}
3365
3e795de7
AD		 3366/**
3367 * con_is_bound - checks if driver is bound to the console
3368 * @csw: console driver
3369 *
3370 * RETURNS: zero if unbound, nonzero if bound
3371 *
3372 * Drivers can call this and if zero, they should release
3373 * all resources allocated on con_startup()
3374 */
3375int con_is_bound(const struct consw *csw)
3376{
3377 int i, bound = 0;
3378
3379 for (i = 0; i < MAX_NR_CONSOLES; i++) {
3380 if (con_driver_map[i] == csw) {
3381 bound = 1;
3382 break;
3383 }
3384 }
3385
3386 return bound;
3387}
3388EXPORT_SYMBOL(con_is_bound);
3389
3390/**
3391 * register_con_driver - register console driver to console layer
3392 * @csw: console driver
3393 * @first: the first console to take over, minimum value is 0
3394 * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1
3395 *
3396 * DESCRIPTION: This function registers a console driver which can later
3397 * bind to a range of consoles specified by @first and @last. It will
3398 * also initialize the console driver by calling con_startup().
3399 */
3400int register_con_driver(const struct consw *csw, int first, int last)
3401{
3402 struct module *owner = csw->owner;
3403 struct con_driver *con_driver;
3404 const char *desc;
3405 int i, retval = 0;
3406
3407 if (!try_module_get(owner))
3408 return -ENODEV;
3409
3410 acquire_console_sem();
3411
3412 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3413 con_driver = &registered_con_driver[i];
3414
3415 /* already registered */
3416 if (con_driver->con == csw)
3417 retval = -EINVAL;
3418 }
3419
3420 if (retval)
3421 goto err;
3422
3423 desc = csw->con_startup();
3424
3425 if (!desc)
3426 goto err;
3427
3428 retval = -EINVAL;
3429
3430 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3431 con_driver = &registered_con_driver[i];
3432
3433 if (con_driver->con == NULL) {
3434 con_driver->con = csw;
3435 con_driver->desc = desc;
6db4063c
AD		 3436 con_driver->node = i;
3437 con_driver->flag = CON_DRIVER_FLAG_MODULE |
3e795de7
AD		 3438 CON_DRIVER_FLAG_INIT;
3439 con_driver->first = first;
3440 con_driver->last = last;
3441 retval = 0;
3442 break;
3443 }
3444 }
3445
6db4063c
AD		 3446 if (retval)
3447 goto err;
3448
47aa5793
GKH		 3449 con_driver->dev = device_create_drvdata(vtconsole_class, NULL,
3450 MKDEV(0, con_driver->node),
3451 NULL, "vtcon%i",
3452 con_driver->node);
6db4063c 3453
805952a8
GKH		 3454 if (IS_ERR(con_driver->dev)) {
3455 printk(KERN_WARNING "Unable to create device for %s; "
6db4063c 3456 "errno = %ld\n", con_driver->desc,
805952a8
GKH		 3457 PTR_ERR(con_driver->dev));
3458 con_driver->dev = NULL;
6db4063c 3459 } else {
805952a8 3460 vtconsole_init_device(con_driver);
6db4063c 3461 }
928e964f 3462
3e795de7
AD		 3463err:
3464 release_console_sem();
3465 module_put(owner);
3466 return retval;
3467}
3468EXPORT_SYMBOL(register_con_driver);
3469
3470/**
3471 * unregister_con_driver - unregister console driver from console layer
3472 * @csw: console driver
3473 *
3474 * DESCRIPTION: All drivers that registers to the console layer must
3475 * call this function upon exit, or if the console driver is in a state
3476 * where it won't be able to handle console services, such as the
3477 * framebuffer console without loaded framebuffer drivers.
3478 *
3479 * The driver must unbind first prior to unregistration.
3480 */
3481int unregister_con_driver(const struct consw *csw)
3482{
3483 int i, retval = -ENODEV;
3484
3485 acquire_console_sem();
3486
3487 /* cannot unregister a bound driver */
3488 if (con_is_bound(csw))
3489 goto err;
3490
3491 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3492 struct con_driver *con_driver = &registered_con_driver[i];
3493
3494 if (con_driver->con == csw &&
6db4063c 3495 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
805952a8
GKH		 3496 vtconsole_deinit_device(con_driver);
3497 device_destroy(vtconsole_class,
3498 MKDEV(0, con_driver->node));
3e795de7
AD		 3499 con_driver->con = NULL;
3500 con_driver->desc = NULL;
805952a8 3501 con_driver->dev = NULL;
6db4063c 3502 con_driver->node = 0;
3e795de7
AD		 3503 con_driver->flag = 0;
3504 con_driver->first = 0;
3505 con_driver->last = 0;
3506 retval = 0;
3507 break;
3508 }
3509 }
3e795de7
AD		 3510err:
3511 release_console_sem();
3512 return retval;
3513}
3514EXPORT_SYMBOL(unregister_con_driver);
3515
3516/*
3517 * If we support more console drivers, this function is used
3518 * when a driver wants to take over some existing consoles
3519 * and become default driver for newly opened ones.
3520 *
3521 * take_over_console is basically a register followed by unbind
3522 */
3523int take_over_console(const struct consw *csw, int first, int last, int deflt)
3524{
3525 int err;
3526
3527 err = register_con_driver(csw, first, last);
3528
3529 if (!err)
6db4063c 3530 bind_con_driver(csw, first, last, deflt);
3e795de7
AD		 3531
3532 return err;
3533}
3534
3535/*
3536 * give_up_console is a wrapper to unregister_con_driver. It will only
3537 * work if driver is fully unbound.
3538 */
3539void give_up_console(const struct consw *csw)
3540{
3541 unregister_con_driver(csw);
3542}
3543
6db4063c 3544static int __init vtconsole_class_init(void)
3e795de7 3545{
6db4063c 3546 int i;
3e795de7 3547
6db4063c
AD		 3548 vtconsole_class = class_create(THIS_MODULE, "vtconsole");
3549 if (IS_ERR(vtconsole_class)) {
3550 printk(KERN_WARNING "Unable to create vt console class; "
3551 "errno = %ld\n", PTR_ERR(vtconsole_class));
3552 vtconsole_class = NULL;
3553 }
3e795de7 3554
6db4063c 3555 /* Add system drivers to sysfs */
3e795de7
AD		 3556 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3557 struct con_driver *con = &registered_con_driver[i];
3558
805952a8 3559 if (con->con && !con->dev) {
47aa5793
GKH		 3560 con->dev = device_create_drvdata(vtconsole_class, NULL,
3561 MKDEV(0, con->node),
3562 NULL, "vtcon%i",
3563 con->node);
6db4063c 3564
805952a8 3565 if (IS_ERR(con->dev)) {
6db4063c 3566 printk(KERN_WARNING "Unable to create "
805952a8
GKH		 3567 "device for %s; errno = %ld\n",
3568 con->desc, PTR_ERR(con->dev));
3569 con->dev = NULL;
6db4063c 3570 } else {
805952a8 3571 vtconsole_init_device(con);
6db4063c 3572 }
3e795de7 3573 }
3e795de7
AD		 3574 }
3575
3e795de7
AD		 3576 return 0;
3577}
6db4063c 3578postcore_initcall(vtconsole_class_init);
3e795de7 3579
1da177e4
LT		 3580#endif
3581
3582/*
3583 * Screen blanking
3584 */
3585
403aac96 3586static int set_vesa_blanking(char __user *p)
1da177e4 3587{
403aac96
YY		 3588 unsigned int mode;
3589
3590 if (get_user(mode, p + 1))
3591 return -EFAULT;
3592
3593 vesa_blank_mode = (mode < 4) ? mode : 0;
3594 return 0;
1da177e4
LT		 3595}
3596
1da177e4
LT		 3597void do_blank_screen(int entering_gfx)
3598{
3599 struct vc_data *vc = vc_cons[fg_console].d;
3600 int i;
3601
3602 WARN_CONSOLE_UNLOCKED();
3603
3604 if (console_blanked) {
3605 if (blank_state == blank_vesa_wait) {
3606 blank_state = blank_off;
d060a321 3607 vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0);
1da177e4
LT		 3608 }
3609 return;
3610 }
1da177e4
LT		 3611
3612 /* entering graphics mode? */
3613 if (entering_gfx) {
3614 hide_cursor(vc);
3615 save_screen(vc);
3616 vc->vc_sw->con_blank(vc, -1, 1);
3617 console_blanked = fg_console + 1;
b6e8f00f 3618 blank_state = blank_off;
1da177e4
LT		 3619 set_origin(vc);
3620 return;
3621 }
3622
b6e8f00f 3623 if (blank_state != blank_normal_wait)
3624 return;
3625 blank_state = blank_off;
3626
1da177e4
LT		 3627 /* don't blank graphics */
3628 if (vc->vc_mode != KD_TEXT) {
3629 console_blanked = fg_console + 1;
3630 return;
3631 }
3632
3633 hide_cursor(vc);
3634 del_timer_sync(&console_timer);
3635 blank_timer_expired = 0;
3636
3637 save_screen(vc);
3638 /* In case we need to reset origin, blanking hook returns 1 */
d060a321 3639 i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0);
1da177e4
LT		 3640 console_blanked = fg_console + 1;
3641 if (i)
3642 set_origin(vc);
3643
3644 if (console_blank_hook && console_blank_hook(1))
3645 return;
3646
d060a321 3647 if (vesa_off_interval && vesa_blank_mode) {
030babac 3648 blank_state = blank_vesa_wait;
1da177e4
LT		 3649 mod_timer(&console_timer, jiffies + vesa_off_interval);
3650 }
1da177e4
LT		 3651}
3652EXPORT_SYMBOL(do_blank_screen);
3653
3654/*
3655 * Called by timer as well as from vt_console_driver
3656 */
3657void do_unblank_screen(int leaving_gfx)
3658{
3659 struct vc_data *vc;
3660
3661 /* This should now always be called from a "sane" (read: can schedule)
3662 * context for the sake of the low level drivers, except in the special
3663 * case of oops_in_progress
3664 */
3665 if (!oops_in_progress)
3666 might_sleep();
3667
3668 WARN_CONSOLE_UNLOCKED();
3669
3670 ignore_poke = 0;
3671 if (!console_blanked)
3672 return;
3673 if (!vc_cons_allocated(fg_console)) {
3674 /* impossible */
3675 printk("unblank_screen: tty %d not allocated ??\n", fg_console+1);
3676 return;
3677 }
3678 vc = vc_cons[fg_console].d;
3679 if (vc->vc_mode != KD_TEXT)
3680 return; /* but leave console_blanked != 0 */
3681
3682 if (blankinterval) {
3683 mod_timer(&console_timer, jiffies + blankinterval);
3684 blank_state = blank_normal_wait;
3685 }
3686
3687 console_blanked = 0;
3688 if (vc->vc_sw->con_blank(vc, 0, leaving_gfx))
3689 /* Low-level driver cannot restore -> do it ourselves */
3690 update_screen(vc);
3691 if (console_blank_hook)
3692 console_blank_hook(0);
3693 set_palette(vc);
3694 set_cursor(vc);
3695}
3696EXPORT_SYMBOL(do_unblank_screen);
3697
3698/*
3699 * This is called by the outside world to cause a forced unblank, mostly for
3700 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
3701 * call it with 1 as an argument and so force a mode restore... that may kill
3702 * X or at least garbage the screen but would also make the Oops visible...
3703 */
3704void unblank_screen(void)
3705{
3706 do_unblank_screen(0);
3707}
3708
3709/*
70522e12 3710 * We defer the timer blanking to work queue so it can take the console mutex
1da177e4 3711 * (console operations can still happen at irq time, but only from printk which
70522e12 3712 * has the console mutex. Not perfect yet, but better than no locking
1da177e4
LT		 3713 */
3714static void blank_screen_t(unsigned long dummy)
3715{
cc63b1e1
JB		 3716 if (unlikely(!keventd_up())) {
3717 mod_timer(&console_timer, jiffies + blankinterval);
3718 return;
3719 }
1da177e4
LT		 3720 blank_timer_expired = 1;
3721 schedule_work(&console_work);
3722}
3723
3724void poke_blanked_console(void)
3725{
3726 WARN_CONSOLE_UNLOCKED();
3727
3728 /* Add this so we quickly catch whoever might call us in a non
3729 * safe context. Nowadays, unblank_screen() isn't to be called in
3730 * atomic contexts and is allowed to schedule (with the special case
3731 * of oops_in_progress, but that isn't of any concern for this
3732 * function. --BenH.
3733 */
3734 might_sleep();
3735
3736 /* This isn't perfectly race free, but a race here would be mostly harmless,
3737 * at worse, we'll do a spurrious blank and it's unlikely
3738 */
3739 del_timer(&console_timer);
3740 blank_timer_expired = 0;
3741
3742 if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS)
3743 return;
3744 if (console_blanked)
3745 unblank_screen();
3746 else if (blankinterval) {
3747 mod_timer(&console_timer, jiffies + blankinterval);
3748 blank_state = blank_normal_wait;
3749 }
3750}
3751
3752/*
3753 * Palettes
3754 */
3755
3756static void set_palette(struct vc_data *vc)
3757{
3758 WARN_CONSOLE_UNLOCKED();
3759
3760 if (vc->vc_mode != KD_GRAPHICS)
3761 vc->vc_sw->con_set_palette(vc, color_table);
3762}
3763
3764static int set_get_cmap(unsigned char __user *arg, int set)
3765{
3766 int i, j, k;
3767
3768 WARN_CONSOLE_UNLOCKED();
3769
3770 for (i = 0; i < 16; i++)
3771 if (set) {
3772 get_user(default_red[i], arg++);
3773 get_user(default_grn[i], arg++);
3774 get_user(default_blu[i], arg++);
3775 } else {
3776 put_user(default_red[i], arg++);
3777 put_user(default_grn[i], arg++);
3778 put_user(default_blu[i], arg++);
3779 }
3780 if (set) {
3781 for (i = 0; i < MAX_NR_CONSOLES; i++)
3782 if (vc_cons_allocated(i)) {
3783 for (j = k = 0; j < 16; j++) {
3784 vc_cons[i].d->vc_palette[k++] = default_red[j];
3785 vc_cons[i].d->vc_palette[k++] = default_grn[j];
3786 vc_cons[i].d->vc_palette[k++] = default_blu[j];
3787 }
3788 set_palette(vc_cons[i].d);
3789 }
3790 }
3791 return 0;
3792}
3793
3794/*
3795 * Load palette into the DAC registers. arg points to a colour
3796 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
3797 */
3798
3799int con_set_cmap(unsigned char __user *arg)
3800{
3801 int rc;
3802
3803 acquire_console_sem();
3804 rc = set_get_cmap (arg,1);
3805 release_console_sem();
3806
3807 return rc;
3808}
3809
3810int con_get_cmap(unsigned char __user *arg)
3811{
3812 int rc;
3813
3814 acquire_console_sem();
3815 rc = set_get_cmap (arg,0);
3816 release_console_sem();
3817
3818 return rc;
3819}
3820
3821void reset_palette(struct vc_data *vc)
3822{
3823 int j, k;
3824 for (j=k=0; j<16; j++) {
3825 vc->vc_palette[k++] = default_red[j];
3826 vc->vc_palette[k++] = default_grn[j];
3827 vc->vc_palette[k++] = default_blu[j];
3828 }
3829 set_palette(vc);
3830}
3831
3832/*
3833 * Font switching
3834 *
3835 * Currently we only support fonts up to 32 pixels wide, at a maximum height
3836 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
3837 * depending on width) reserved for each character which is kinda wasty, but
3838 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
3839 * is upto the actual low-level console-driver convert data into its favorite
3840 * format (maybe we should add a `fontoffset' field to the `display'
3841 * structure so we won't have to convert the fontdata all the time.
3842 * /Jes
3843 */
3844
3845#define max_font_size 65536
3846
3847static int con_font_get(struct vc_data *vc, struct console_font_op *op)
3848{
3849 struct console_font font;
3850 int rc = -EINVAL;
3851 int c;
3852
3853 if (vc->vc_mode != KD_TEXT)
3854 return -EINVAL;
3855
3856 if (op->data) {
3857 font.data = kmalloc(max_font_size, GFP_KERNEL);
3858 if (!font.data)
3859 return -ENOMEM;
3860 } else
3861 font.data = NULL;
3862
3863 acquire_console_sem();
3864 if (vc->vc_sw->con_font_get)
3865 rc = vc->vc_sw->con_font_get(vc, &font);
3866 else
3867 rc = -ENOSYS;
3868 release_console_sem();
3869
3870 if (rc)
3871 goto out;
3872
3873 c = (font.width+7)/8 * 32 * font.charcount;
04f378b1 3874
1da177e4
LT		 3875 if (op->data && font.charcount > op->charcount)
3876 rc = -ENOSPC;
3877 if (!(op->flags & KD_FONT_FLAG_OLD)) {
3878 if (font.width > op->width || font.height > op->height)
3879 rc = -ENOSPC;
3880 } else {
3881 if (font.width != 8)
3882 rc = -EIO;
3883 else if ((op->height && font.height > op->height) ||
3884 font.height > 32)
3885 rc = -ENOSPC;
3886 }
3887 if (rc)
3888 goto out;
3889
3890 op->height = font.height;
3891 op->width = font.width;
3892 op->charcount = font.charcount;
3893
3894 if (op->data && copy_to_user(op->data, font.data, c))
3895 rc = -EFAULT;
3896
3897out:
3898 kfree(font.data);
3899 return rc;
3900}
3901
3902static int con_font_set(struct vc_data *vc, struct console_font_op *op)
3903{
3904 struct console_font font;
3905 int rc = -EINVAL;
3906 int size;
3907
3908 if (vc->vc_mode != KD_TEXT)
3909 return -EINVAL;
3910 if (!op->data)
3911 return -EINVAL;
3912 if (op->charcount > 512)
3913 return -EINVAL;
3914 if (!op->height) { /* Need to guess font height [compat] */
3915 int h, i;
3916 u8 __user *charmap = op->data;
3917 u8 tmp;
3918
3919 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
3920 so that we can get rid of this soon */
3921 if (!(op->flags & KD_FONT_FLAG_OLD))
3922 return -EINVAL;
3923 for (h = 32; h > 0; h--)
3924 for (i = 0; i < op->charcount; i++) {
3925 if (get_user(tmp, &charmap[32*i+h-1]))
3926 return -EFAULT;
3927 if (tmp)
3928 goto nonzero;
3929 }
3930 return -EINVAL;
3931 nonzero:
3932 op->height = h;
3933 }
3934 if (op->width <= 0 || op->width > 32 || op->height > 32)
3935 return -EINVAL;
3936 size = (op->width+7)/8 * 32 * op->charcount;
3937 if (size > max_font_size)
3938 return -ENOSPC;
3939 font.charcount = op->charcount;
3940 font.height = op->height;
3941 font.width = op->width;
3942 font.data = kmalloc(size, GFP_KERNEL);
3943 if (!font.data)
3944 return -ENOMEM;
3945 if (copy_from_user(font.data, op->data, size)) {
3946 kfree(font.data);
3947 return -EFAULT;
3948 }
3949 acquire_console_sem();
3950 if (vc->vc_sw->con_font_set)
3951 rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
3952 else
3953 rc = -ENOSYS;
3954 release_console_sem();
3955 kfree(font.data);
3956 return rc;
3957}
3958
3959static int con_font_default(struct vc_data *vc, struct console_font_op *op)
3960{
3961 struct console_font font = {.width = op->width, .height = op->height};
3962 char name[MAX_FONT_NAME];
3963 char *s = name;
3964 int rc;
3965
3966 if (vc->vc_mode != KD_TEXT)
3967 return -EINVAL;
3968
3969 if (!op->data)
3970 s = NULL;
3971 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0)
3972 return -EFAULT;
3973 else
3974 name[MAX_FONT_NAME - 1] = 0;
3975
3976 acquire_console_sem();
3977 if (vc->vc_sw->con_font_default)
3978 rc = vc->vc_sw->con_font_default(vc, &font, s);
3979 else
3980 rc = -ENOSYS;
3981 release_console_sem();
3982 if (!rc) {
3983 op->width = font.width;
3984 op->height = font.height;
3985 }
3986 return rc;
3987}
3988
3989static int con_font_copy(struct vc_data *vc, struct console_font_op *op)
3990{
3991 int con = op->height;
3992 int rc;
3993
3994 if (vc->vc_mode != KD_TEXT)
3995 return -EINVAL;
3996
3997 acquire_console_sem();
3998 if (!vc->vc_sw->con_font_copy)
3999 rc = -ENOSYS;
4000 else if (con < 0 || !vc_cons_allocated(con))
4001 rc = -ENOTTY;
4002 else if (con == vc->vc_num) /* nothing to do */
4003 rc = 0;
4004 else
4005 rc = vc->vc_sw->con_font_copy(vc, con);
4006 release_console_sem();
4007 return rc;
4008}
4009
4010int con_font_op(struct vc_data *vc, struct console_font_op *op)
4011{
4012 switch (op->op) {
4013 case KD_FONT_OP_SET:
4014 return con_font_set(vc, op);
4015 case KD_FONT_OP_GET:
4016 return con_font_get(vc, op);
4017 case KD_FONT_OP_SET_DEFAULT:
4018 return con_font_default(vc, op);
4019 case KD_FONT_OP_COPY:
4020 return con_font_copy(vc, op);
4021 }
4022 return -ENOSYS;
4023}
4024
4025/*
4026 * Interface exported to selection and vcs.
4027 */
4028
4029/* used by selection */
4030u16 screen_glyph(struct vc_data *vc, int offset)
4031{
4032 u16 w = scr_readw(screenpos(vc, offset, 1));
4033 u16 c = w & 0xff;
4034
4035 if (w & vc->vc_hi_font_mask)
4036 c |= 0x100;
4037 return c;
4038}
f7511d5f 4039EXPORT_SYMBOL_GPL(screen_glyph);
1da177e4
LT		 4040
4041/* used by vcs - note the word offset */
4042unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed)
4043{
4044 return screenpos(vc, 2 * w_offset, viewed);
4045}
4046
4047void getconsxy(struct vc_data *vc, unsigned char *p)
4048{
4049 p[0] = vc->vc_x;
4050 p[1] = vc->vc_y;
4051}
4052
4053void putconsxy(struct vc_data *vc, unsigned char *p)
4054{
9477e260 4055 hide_cursor(vc);
1da177e4
LT		 4056 gotoxy(vc, p[0], p[1]);
4057 set_cursor(vc);
4058}
4059
4060u16 vcs_scr_readw(struct vc_data *vc, const u16 *org)
4061{
4062 if ((unsigned long)org == vc->vc_pos && softcursor_original != -1)
4063 return softcursor_original;
4064 return scr_readw(org);
4065}
4066
4067void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org)
4068{
4069 scr_writew(val, org);
4070 if ((unsigned long)org == vc->vc_pos) {
4071 softcursor_original = -1;
4072 add_softcursor(vc);
4073 }
4074}
4075
4076/*
4077 * Visible symbols for modules
4078 */
4079
4080EXPORT_SYMBOL(color_table);
4081EXPORT_SYMBOL(default_red);
4082EXPORT_SYMBOL(default_grn);
4083EXPORT_SYMBOL(default_blu);
4084EXPORT_SYMBOL(update_region);
4085EXPORT_SYMBOL(redraw_screen);
4086EXPORT_SYMBOL(vc_resize);
4087EXPORT_SYMBOL(fg_console);
4088EXPORT_SYMBOL(console_blank_hook);
4089EXPORT_SYMBOL(console_blanked);
4090EXPORT_SYMBOL(vc_cons);
4091#ifndef VT_SINGLE_DRIVER
4092EXPORT_SYMBOL(take_over_console);
4093EXPORT_SYMBOL(give_up_console);
4094#endif
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