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Documentation/atomic_ops.txt: fix sample code
[thirdparty/linux.git] / drivers / char / vt.c
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1da177e4
LT		 1/*
2 * linux/drivers/char/vt.c
3 *
4 * Copyright (C) 1991, 1992 Linus Torvalds
5 */
6
7/*
8 * Hopefully this will be a rather complete VT102 implementation.
9 *
10 * Beeping thanks to John T Kohl.
11 *
12 * Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics
13 * Chars, and VT100 enhancements by Peter MacDonald.
14 *
15 * Copy and paste function by Andrew Haylett,
16 * some enhancements by Alessandro Rubini.
17 *
18 * Code to check for different video-cards mostly by Galen Hunt,
19 * <g-hunt@ee.utah.edu>
20 *
21 * Rudimentary ISO 10646/Unicode/UTF-8 character set support by
22 * Markus Kuhn, <mskuhn@immd4.informatik.uni-erlangen.de>.
23 *
24 * Dynamic allocation of consoles, aeb@cwi.nl, May 1994
25 * Resizing of consoles, aeb, 940926
26 *
27 * Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94
28 * <poe@daimi.aau.dk>
29 *
30 * User-defined bell sound, new setterm control sequences and printk
31 * redirection by Martin Mares <mj@k332.feld.cvut.cz> 19-Nov-95
32 *
33 * APM screenblank bug fixed Takashi Manabe <manabe@roy.dsl.tutics.tut.jp>
34 *
35 * Merge with the abstract console driver by Geert Uytterhoeven
36 * <geert@linux-m68k.org>, Jan 1997.
37 *
38 * Original m68k console driver modifications by
39 *
40 * - Arno Griffioen <arno@usn.nl>
41 * - David Carter <carter@cs.bris.ac.uk>
42 *
43 * The abstract console driver provides a generic interface for a text
44 * console. It supports VGA text mode, frame buffer based graphical consoles
45 * and special graphics processors that are only accessible through some
46 * registers (e.g. a TMS340x0 GSP).
47 *
48 * The interface to the hardware is specified using a special structure
49 * (struct consw) which contains function pointers to console operations
50 * (see <linux/console.h> for more information).
51 *
52 * Support for changeable cursor shape
53 * by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997
54 *
55 * Ported to i386 and con_scrolldelta fixed
56 * by Emmanuel Marty <core@ggi-project.org>, April 1998
57 *
58 * Resurrected character buffers in videoram plus lots of other trickery
59 * by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998
60 *
61 * Removed old-style timers, introduced console_timer, made timer
e1f8e874 62 * deletion SMP-safe. 17Jun00, Andrew Morton
1da177e4
LT		 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 97#include <linux/workqueue.h>
1da177e4
LT		 98#include <linux/pm.h>
99#include <linux/font.h>
100#include <linux/bitops.h>
b293d758 101#include <linux/notifier.h>
d81ed103
AC		 102#include <linux/device.h>
103#include <linux/io.h>
1da177e4 104#include <asm/system.h>
d81ed103 105#include <linux/uaccess.h>
1da177e4 106
3e795de7 107#define MAX_NR_CON_DRIVER 16
1da177e4 108
6db4063c 109#define CON_DRIVER_FLAG_MODULE 1
928e964f
AD		 110#define CON_DRIVER_FLAG_INIT 2
111#define CON_DRIVER_FLAG_ATTR 4
3e795de7
AD		 112
113struct con_driver {
114 const struct consw *con;
115 const char *desc;
805952a8 116 struct device *dev;
6db4063c 117 int node;
3e795de7
AD		 118 int first;
119 int last;
120 int flag;
121};
122
123static struct con_driver registered_con_driver[MAX_NR_CON_DRIVER];
1da177e4
LT		 124const struct consw *conswitchp;
125
126/* A bitmap for codes <32. A bit of 1 indicates that the code
127 * corresponding to that bit number invokes some special action
128 * (such as cursor movement) and should not be displayed as a
129 * glyph unless the disp_ctrl mode is explicitly enabled.
130 */
131#define CTRL_ACTION 0x0d00ff81
132#define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */
133
134/*
135 * Here is the default bell parameters: 750HZ, 1/8th of a second
136 */
137#define DEFAULT_BELL_PITCH 750
138#define DEFAULT_BELL_DURATION (HZ/8)
139
1da177e4
LT		 140struct vc vc_cons [MAX_NR_CONSOLES];
141
142#ifndef VT_SINGLE_DRIVER
143static const struct consw *con_driver_map[MAX_NR_CONSOLES];
144#endif
145
146static int con_open(struct tty_struct *, struct file *);
147static void vc_init(struct vc_data *vc, unsigned int rows,
148 unsigned int cols, int do_clear);
149static void gotoxy(struct vc_data *vc, int new_x, int new_y);
150static void save_cur(struct vc_data *vc);
151static void reset_terminal(struct vc_data *vc, int do_clear);
152static void con_flush_chars(struct tty_struct *tty);
403aac96 153static int set_vesa_blanking(char __user *p);
1da177e4
LT		 154static void set_cursor(struct vc_data *vc);
155static void hide_cursor(struct vc_data *vc);
65f27f38 156static void console_callback(struct work_struct *ignored);
1da177e4
LT		 157static void blank_screen_t(unsigned long dummy);
158static void set_palette(struct vc_data *vc);
159
160static int printable; /* Is console ready for printing? */
77bf2bab 161int default_utf8 = true;
042f10ec 162module_param(default_utf8, int, S_IRUGO | S_IWUSR);
1da177e4
LT		 163
164/*
165 * ignore_poke: don't unblank the screen when things are typed. This is
166 * mainly for the privacy of braille terminal users.
167 */
168static int ignore_poke;
169
170int do_poke_blanked_console;
171int console_blanked;
172
173static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
174static int blankinterval = 10*60*HZ;
175static int vesa_off_interval;
176
65f27f38 177static DECLARE_WORK(console_work, console_callback);
1da177e4
LT		 178
179/*
180 * fg_console is the current virtual console,
181 * last_console is the last used one,
182 * want_console is the console we want to switch to,
183 * kmsg_redirect is the console for kernel messages,
184 */
185int fg_console;
186int last_console;
187int want_console = -1;
188int kmsg_redirect;
189
190/*
191 * For each existing display, we have a pointer to console currently visible
192 * on that display, allowing consoles other than fg_console to be refreshed
193 * appropriately. Unless the low-level driver supplies its own display_fg
194 * variable, we use this one for the "master display".
195 */
196static struct vc_data *master_display_fg;
197
198/*
199 * Unfortunately, we need to delay tty echo when we're currently writing to the
200 * console since the code is (and always was) not re-entrant, so we schedule
201 * all flip requests to process context with schedule-task() and run it from
202 * console_callback().
203 */
204
205/*
206 * For the same reason, we defer scrollback to the console callback.
207 */
208static int scrollback_delta;
209
210/*
211 * Hook so that the power management routines can (un)blank
212 * the console on our behalf.
213 */
214int (*console_blank_hook)(int);
215
40565f19 216static DEFINE_TIMER(console_timer, blank_screen_t, 0, 0);
1da177e4
LT		 217static int blank_state;
218static int blank_timer_expired;
219enum {
220 blank_off = 0,
221 blank_normal_wait,
222 blank_vesa_wait,
223};
224
b293d758
ST		 225/*
226 * Notifier list for console events.
227 */
228static ATOMIC_NOTIFIER_HEAD(vt_notifier_list);
229
230int register_vt_notifier(struct notifier_block *nb)
231{
232 return atomic_notifier_chain_register(&vt_notifier_list, nb);
233}
234EXPORT_SYMBOL_GPL(register_vt_notifier);
235
236int unregister_vt_notifier(struct notifier_block *nb)
237{
238 return atomic_notifier_chain_unregister(&vt_notifier_list, nb);
239}
240EXPORT_SYMBOL_GPL(unregister_vt_notifier);
241
242static void notify_write(struct vc_data *vc, unsigned int unicode)
243{
244 struct vt_notifier_param param = { .vc = vc, unicode = unicode };
245 atomic_notifier_call_chain(&vt_notifier_list, VT_WRITE, &param);
246}
247
248static void notify_update(struct vc_data *vc)
249{
250 struct vt_notifier_param param = { .vc = vc };
251 atomic_notifier_call_chain(&vt_notifier_list, VT_UPDATE, &param);
252}
253
1da177e4
LT		 254/*
255 * Low-Level Functions
256 */
257
258#define IS_FG(vc) ((vc)->vc_num == fg_console)
259
260#ifdef VT_BUF_VRAM_ONLY
261#define DO_UPDATE(vc) 0
262#else
f700d6e5 263#define DO_UPDATE(vc) (CON_IS_VISIBLE(vc) && !console_blanked)
1da177e4
LT		 264#endif
265
266static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed)
267{
268 unsigned short *p;
269
270 if (!viewed)
271 p = (unsigned short *)(vc->vc_origin + offset);
272 else if (!vc->vc_sw->con_screen_pos)
273 p = (unsigned short *)(vc->vc_visible_origin + offset);
274 else
275 p = vc->vc_sw->con_screen_pos(vc, offset);
276 return p;
277}
278
279static inline void scrolldelta(int lines)
280{
281 scrollback_delta += lines;
282 schedule_console_callback();
283}
284
285void schedule_console_callback(void)
286{
287 schedule_work(&console_work);
288}
289
290static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
291{
292 unsigned short *d, *s;
293
294 if (t+nr >= b)
295 nr = b - t - 1;
296 if (b > vc->vc_rows || t >= b || nr < 1)
297 return;
298 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr))
299 return;
300 d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
301 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr));
302 scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row);
93f78da4 303 scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_video_erase_char,
1da177e4
LT		 304 vc->vc_size_row * nr);
305}
306
307static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
308{
309 unsigned short *s;
310 unsigned int step;
311
312 if (t+nr >= b)
313 nr = b - t - 1;
314 if (b > vc->vc_rows || t >= b || nr < 1)
315 return;
316 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr))
317 return;
318 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
319 step = vc->vc_cols * nr;
320 scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row);
93f78da4 321 scr_memsetw(s, vc->vc_video_erase_char, 2 * step);
1da177e4
LT		 322}
323
324static void do_update_region(struct vc_data *vc, unsigned long start, int count)
325{
326#ifndef VT_BUF_VRAM_ONLY
327 unsigned int xx, yy, offset;
328 u16 *p;
329
330 p = (u16 *) start;
331 if (!vc->vc_sw->con_getxy) {
332 offset = (start - vc->vc_origin) / 2;
333 xx = offset % vc->vc_cols;
334 yy = offset / vc->vc_cols;
335 } else {
336 int nxx, nyy;
337 start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy);
338 xx = nxx; yy = nyy;
339 }
340 for(;;) {
341 u16 attrib = scr_readw(p) & 0xff00;
342 int startx = xx;
343 u16 *q = p;
344 while (xx < vc->vc_cols && count) {
345 if (attrib != (scr_readw(p) & 0xff00)) {
346 if (p > q)
347 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
348 startx = xx;
349 q = p;
350 attrib = scr_readw(p) & 0xff00;
351 }
352 p++;
353 xx++;
354 count--;
355 }
356 if (p > q)
357 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
358 if (!count)
359 break;
360 xx = 0;
361 yy++;
362 if (vc->vc_sw->con_getxy) {
363 p = (u16 *)start;
364 start = vc->vc_sw->con_getxy(vc, start, NULL, NULL);
365 }
366 }
367#endif
368}
369
370void update_region(struct vc_data *vc, unsigned long start, int count)
371{
372 WARN_CONSOLE_UNLOCKED();
373
374 if (DO_UPDATE(vc)) {
375 hide_cursor(vc);
376 do_update_region(vc, start, count);
377 set_cursor(vc);
378 }
379}
380
381/* Structure of attributes is hardware-dependent */
382
fa6ce9ab
JE		 383static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink,
384 u8 _underline, u8 _reverse, u8 _italic)
1da177e4
LT		 385{
386 if (vc->vc_sw->con_build_attr)
fa6ce9ab
JE		 387 return vc->vc_sw->con_build_attr(vc, _color, _intensity,
388 _blink, _underline, _reverse, _italic);
1da177e4
LT		 389
390#ifndef VT_BUF_VRAM_ONLY
391/*
392 * ++roman: I completely changed the attribute format for monochrome
393 * mode (!can_do_color). The formerly used MDA (monochrome display
394 * adapter) format didn't allow the combination of certain effects.
395 * Now the attribute is just a bit vector:
396 * Bit 0..1: intensity (0..2)
397 * Bit 2 : underline
398 * Bit 3 : reverse
399 * Bit 7 : blink
400 */
401 {
c9e587ab 402 u8 a = _color;
1da177e4
LT		 403 if (!vc->vc_can_do_color)
404 return _intensity |
fa6ce9ab 405 (_italic ? 2 : 0) |
1da177e4
LT		 406 (_underline ? 4 : 0) |
407 (_reverse ? 8 : 0) |
408 (_blink ? 0x80 : 0);
fa6ce9ab
JE		 409 if (_italic)
410 a = (a & 0xF0) | vc->vc_itcolor;
411 else if (_underline)
1da177e4
LT		 412 a = (a & 0xf0) | vc->vc_ulcolor;
413 else if (_intensity == 0)
414 a = (a & 0xf0) | vc->vc_ulcolor;
415 if (_reverse)
416 a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77);
417 if (_blink)
418 a ^= 0x80;
419 if (_intensity == 2)
420 a ^= 0x08;
421 if (vc->vc_hi_font_mask == 0x100)
422 a <<= 1;
423 return a;
424 }
425#else
426 return 0;
427#endif
428}
429
430static void update_attr(struct vc_data *vc)
431{
fa6ce9ab
JE		 432 vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity,
433 vc->vc_blink, vc->vc_underline,
434 vc->vc_reverse ^ vc->vc_decscnm, vc->vc_italic);
435 vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm, 0) << 8) | ' ';
1da177e4
LT		 436}
437
438/* Note: inverting the screen twice should revert to the original state */
439void invert_screen(struct vc_data *vc, int offset, int count, int viewed)
440{
441 unsigned short *p;
442
443 WARN_CONSOLE_UNLOCKED();
444
445 count /= 2;
446 p = screenpos(vc, offset, viewed);
447 if (vc->vc_sw->con_invert_region)
448 vc->vc_sw->con_invert_region(vc, p, count);
449#ifndef VT_BUF_VRAM_ONLY
450 else {
451 u16 *q = p;
452 int cnt = count;
453 u16 a;
454
455 if (!vc->vc_can_do_color) {
456 while (cnt--) {
457 a = scr_readw(q);
458 a ^= 0x0800;
459 scr_writew(a, q);
460 q++;
461 }
462 } else if (vc->vc_hi_font_mask == 0x100) {
463 while (cnt--) {
464 a = scr_readw(q);
465 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4);
466 scr_writew(a, q);
467 q++;
468 }
469 } else {
470 while (cnt--) {
471 a = scr_readw(q);
472 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4);
473 scr_writew(a, q);
474 q++;
475 }
476 }
477 }
478#endif
479 if (DO_UPDATE(vc))
480 do_update_region(vc, (unsigned long) p, count);
481}
482
483/* used by selection: complement pointer position */
484void complement_pos(struct vc_data *vc, int offset)
485{
414edcd3 486 static int old_offset = -1;
1da177e4
LT		 487 static unsigned short old;
488 static unsigned short oldx, oldy;
489
490 WARN_CONSOLE_UNLOCKED();
491
414edcd3
AD		 492 if (old_offset != -1 && old_offset >= 0 &&
493 old_offset < vc->vc_screenbuf_size) {
494 scr_writew(old, screenpos(vc, old_offset, 1));
1da177e4
LT		 495 if (DO_UPDATE(vc))
496 vc->vc_sw->con_putc(vc, old, oldy, oldx);
497 }
414edcd3
AD		 498
499 old_offset = offset;
500
501 if (offset != -1 && offset >= 0 &&
502 offset < vc->vc_screenbuf_size) {
1da177e4 503 unsigned short new;
414edcd3 504 unsigned short *p;
1da177e4
LT		 505 p = screenpos(vc, offset, 1);
506 old = scr_readw(p);
507 new = old ^ vc->vc_complement_mask;
508 scr_writew(new, p);
509 if (DO_UPDATE(vc)) {
510 oldx = (offset >> 1) % vc->vc_cols;
511 oldy = (offset >> 1) / vc->vc_cols;
512 vc->vc_sw->con_putc(vc, new, oldy, oldx);
513 }
514 }
414edcd3 515
1da177e4
LT		 516}
517
518static void insert_char(struct vc_data *vc, unsigned int nr)
519{
520 unsigned short *p, *q = (unsigned short *)vc->vc_pos;
521
522 p = q + vc->vc_cols - nr - vc->vc_x;
523 while (--p >= q)
524 scr_writew(scr_readw(p), p + nr);
525 scr_memsetw(q, vc->vc_video_erase_char, nr * 2);
526 vc->vc_need_wrap = 0;
527 if (DO_UPDATE(vc)) {
528 unsigned short oldattr = vc->vc_attr;
529 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x, vc->vc_y, vc->vc_x + nr, 1,
530 vc->vc_cols - vc->vc_x - nr);
531 vc->vc_attr = vc->vc_video_erase_char >> 8;
532 while (nr--)
533 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y, vc->vc_x + nr);
534 vc->vc_attr = oldattr;
535 }
536}
537
538static void delete_char(struct vc_data *vc, unsigned int nr)
539{
540 unsigned int i = vc->vc_x;
541 unsigned short *p = (unsigned short *)vc->vc_pos;
542
543 while (++i <= vc->vc_cols - nr) {
544 scr_writew(scr_readw(p+nr), p);
545 p++;
546 }
547 scr_memsetw(p, vc->vc_video_erase_char, nr * 2);
548 vc->vc_need_wrap = 0;
549 if (DO_UPDATE(vc)) {
550 unsigned short oldattr = vc->vc_attr;
551 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x + nr, vc->vc_y, vc->vc_x, 1,
552 vc->vc_cols - vc->vc_x - nr);
553 vc->vc_attr = vc->vc_video_erase_char >> 8;
554 while (nr--)
555 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y,
556 vc->vc_cols - 1 - nr);
557 vc->vc_attr = oldattr;
558 }
559}
560
561static int softcursor_original;
562
563static void add_softcursor(struct vc_data *vc)
564{
565 int i = scr_readw((u16 *) vc->vc_pos);
566 u32 type = vc->vc_cursor_type;
567
568 if (! (type & 0x10)) return;
569 if (softcursor_original != -1) return;
570 softcursor_original = i;
571 i |= ((type >> 8) & 0xff00 );
572 i ^= ((type) & 0xff00 );
573 if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000;
574 if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700;
575 scr_writew(i, (u16 *) vc->vc_pos);
576 if (DO_UPDATE(vc))
577 vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x);
578}
579
580static void hide_softcursor(struct vc_data *vc)
581{
582 if (softcursor_original != -1) {
583 scr_writew(softcursor_original, (u16 *)vc->vc_pos);
584 if (DO_UPDATE(vc))
585 vc->vc_sw->con_putc(vc, softcursor_original,
586 vc->vc_y, vc->vc_x);
587 softcursor_original = -1;
588 }
589}
590
591static void hide_cursor(struct vc_data *vc)
592{
593 if (vc == sel_cons)
594 clear_selection();
595 vc->vc_sw->con_cursor(vc, CM_ERASE);
596 hide_softcursor(vc);
597}
598
599static void set_cursor(struct vc_data *vc)
600{
601 if (!IS_FG(vc) || console_blanked ||
602 vc->vc_mode == KD_GRAPHICS)
603 return;
604 if (vc->vc_deccm) {
605 if (vc == sel_cons)
606 clear_selection();
607 add_softcursor(vc);
608 if ((vc->vc_cursor_type & 0x0f) != 1)
609 vc->vc_sw->con_cursor(vc, CM_DRAW);
610 } else
611 hide_cursor(vc);
612}
613
614static void set_origin(struct vc_data *vc)
615{
616 WARN_CONSOLE_UNLOCKED();
617
618 if (!CON_IS_VISIBLE(vc) ||
619 !vc->vc_sw->con_set_origin ||
620 !vc->vc_sw->con_set_origin(vc))
621 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
622 vc->vc_visible_origin = vc->vc_origin;
623 vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size;
624 vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x;
625}
626
627static inline void save_screen(struct vc_data *vc)
628{
629 WARN_CONSOLE_UNLOCKED();
630
631 if (vc->vc_sw->con_save_screen)
632 vc->vc_sw->con_save_screen(vc);
633}
634
635/*
636 * Redrawing of screen
637 */
638
639static void clear_buffer_attributes(struct vc_data *vc)
640{
641 unsigned short *p = (unsigned short *)vc->vc_origin;
642 int count = vc->vc_screenbuf_size / 2;
643 int mask = vc->vc_hi_font_mask | 0xff;
644
645 for (; count > 0; count--, p++) {
646 scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p);
647 }
648}
649
650void redraw_screen(struct vc_data *vc, int is_switch)
651{
652 int redraw = 0;
653
654 WARN_CONSOLE_UNLOCKED();
655
656 if (!vc) {
657 /* strange ... */
658 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
659 return;
660 }
661
662 if (is_switch) {
663 struct vc_data *old_vc = vc_cons[fg_console].d;
664 if (old_vc == vc)
665 return;
666 if (!CON_IS_VISIBLE(vc))
667 redraw = 1;
668 *vc->vc_display_fg = vc;
669 fg_console = vc->vc_num;
670 hide_cursor(old_vc);
671 if (!CON_IS_VISIBLE(old_vc)) {
672 save_screen(old_vc);
673 set_origin(old_vc);
674 }
675 } else {
676 hide_cursor(vc);
677 redraw = 1;
678 }
679
680 if (redraw) {
681 int update;
682 int old_was_color = vc->vc_can_do_color;
683
684 set_origin(vc);
685 update = vc->vc_sw->con_switch(vc);
686 set_palette(vc);
687 /*
688 * If console changed from mono<->color, the best we can do
689 * is to clear the buffer attributes. As it currently stands,
690 * rebuilding new attributes from the old buffer is not doable
691 * without overly complex code.
692 */
693 if (old_was_color != vc->vc_can_do_color) {
694 update_attr(vc);
695 clear_buffer_attributes(vc);
696 }
697 if (update && vc->vc_mode != KD_GRAPHICS)
698 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
699 }
700 set_cursor(vc);
701 if (is_switch) {
702 set_leds();
703 compute_shiftstate();
8182ec49 704 notify_update(vc);
1da177e4
LT		 705 }
706}
707
708/*
709 * Allocation, freeing and resizing of VTs.
710 */
711
712int vc_cons_allocated(unsigned int i)
713{
714 return (i < MAX_NR_CONSOLES && vc_cons[i].d);
715}
716
717static void visual_init(struct vc_data *vc, int num, int init)
718{
719 /* ++Geert: vc->vc_sw->con_init determines console size */
720 if (vc->vc_sw)
721 module_put(vc->vc_sw->owner);
722 vc->vc_sw = conswitchp;
723#ifndef VT_SINGLE_DRIVER
724 if (con_driver_map[num])
725 vc->vc_sw = con_driver_map[num];
726#endif
727 __module_get(vc->vc_sw->owner);
728 vc->vc_num = num;
729 vc->vc_display_fg = &master_display_fg;
730 vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir;
731 vc->vc_uni_pagedir = 0;
732 vc->vc_hi_font_mask = 0;
733 vc->vc_complement_mask = 0;
734 vc->vc_can_do_color = 0;
735 vc->vc_sw->con_init(vc, init);
736 if (!vc->vc_complement_mask)
737 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
738 vc->vc_s_complement_mask = vc->vc_complement_mask;
739 vc->vc_size_row = vc->vc_cols << 1;
740 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
741}
742
743int vc_allocate(unsigned int currcons) /* return 0 on success */
744{
745 WARN_CONSOLE_UNLOCKED();
746
747 if (currcons >= MAX_NR_CONSOLES)
748 return -ENXIO;
749 if (!vc_cons[currcons].d) {
750 struct vc_data *vc;
b293d758 751 struct vt_notifier_param param;
1da177e4
LT		 752
753 /* prevent users from taking too much memory */
754 if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE))
755 return -EPERM;
756
757 /* due to the granularity of kmalloc, we waste some memory here */
758 /* the alloc is done in two steps, to optimize the common situation
759 of a 25x80 console (structsize=216, screenbuf_size=4000) */
760 /* although the numbers above are not valid since long ago, the
761 point is still up-to-date and the comment still has its value
762 even if only as a historical artifact. --mj, July 1998 */
b293d758 763 param.vc = vc = kzalloc(sizeof(struct vc_data), GFP_KERNEL);
1da177e4
LT		 764 if (!vc)
765 return -ENOMEM;
1da177e4 766 vc_cons[currcons].d = vc;
c2c88f10 767 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
1da177e4
LT		 768 visual_init(vc, currcons, 1);
769 if (!*vc->vc_uni_pagedir_loc)
770 con_set_default_unimap(vc);
254e948b
CM		 771 if (!vc->vc_kmalloced)
772 vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL);
1da177e4
LT		 773 if (!vc->vc_screenbuf) {
774 kfree(vc);
775 vc_cons[currcons].d = NULL;
776 return -ENOMEM;
777 }
778 vc->vc_kmalloced = 1;
779 vc_init(vc, vc->vc_rows, vc->vc_cols, 1);
4995f8ef 780 vcs_make_sysfs(currcons);
b293d758 781 atomic_notifier_call_chain(&vt_notifier_list, VT_ALLOCATE, &param);
1da177e4
LT		 782 }
783 return 0;
784}
785
e400b6ec
AD		 786static inline int resize_screen(struct vc_data *vc, int width, int height,
787 int user)
1da177e4
LT		 788{
789 /* Resizes the resolution of the display adapater */
790 int err = 0;
791
792 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize)
e400b6ec
AD		 793 err = vc->vc_sw->con_resize(vc, width, height, user);
794
1da177e4
LT		 795 return err;
796}
797
798/*
799 * Change # of rows and columns (0 means unchanged/the size of fg_console)
800 * [this is to be used together with some user program
801 * like resize that changes the hardware videomode]
802 */
803#define VC_RESIZE_MAXCOL (32767)
804#define VC_RESIZE_MAXROW (32767)
8c9a9dd0
AC		 805
806/**
807 * vc_do_resize - resizing method for the tty
808 * @tty: tty being resized
809 * @real_tty: real tty (different to tty if a pty/tty pair)
810 * @vc: virtual console private data
811 * @cols: columns
812 * @lines: lines
813 *
814 * Resize a virtual console, clipping according to the actual constraints.
815 * If the caller passes a tty structure then update the termios winsize
816 * information and perform any neccessary signal handling.
817 *
818 * Caller must hold the console semaphore. Takes the termios mutex and
819 * ctrl_lock of the tty IFF a tty is passed.
820 */
821
fc6f6238
AC		 822static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc,
823 unsigned int cols, unsigned int lines)
1da177e4
LT		 824{
825 unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0;
826 unsigned int old_cols, old_rows, old_row_size, old_screen_size;
827 unsigned int new_cols, new_rows, new_row_size, new_screen_size;
e400b6ec 828 unsigned int end, user;
1da177e4
LT		 829 unsigned short *newscreen;
830
831 WARN_CONSOLE_UNLOCKED();
832
833 if (!vc)
834 return -ENXIO;
835
e400b6ec
AD		 836 user = vc->vc_resize_user;
837 vc->vc_resize_user = 0;
838
1da177e4
LT		 839 if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW)
840 return -EINVAL;
841
842 new_cols = (cols ? cols : vc->vc_cols);
843 new_rows = (lines ? lines : vc->vc_rows);
844 new_row_size = new_cols << 1;
845 new_screen_size = new_row_size * new_rows;
846
847 if (new_cols == vc->vc_cols && new_rows == vc->vc_rows)
848 return 0;
849
5cbded58 850 newscreen = kmalloc(new_screen_size, GFP_USER);
1da177e4
LT		 851 if (!newscreen)
852 return -ENOMEM;
853
854 old_rows = vc->vc_rows;
855 old_cols = vc->vc_cols;
856 old_row_size = vc->vc_size_row;
857 old_screen_size = vc->vc_screenbuf_size;
858
e400b6ec 859 err = resize_screen(vc, new_cols, new_rows, user);
1da177e4
LT		 860 if (err) {
861 kfree(newscreen);
862 return err;
863 }
864
865 vc->vc_rows = new_rows;
866 vc->vc_cols = new_cols;
867 vc->vc_size_row = new_row_size;
868 vc->vc_screenbuf_size = new_screen_size;
869
870 rlth = min(old_row_size, new_row_size);
871 rrem = new_row_size - rlth;
872 old_origin = vc->vc_origin;
873 new_origin = (long) newscreen;
874 new_scr_end = new_origin + new_screen_size;
3b41dc1a
AD		 875
876 if (vc->vc_y > new_rows) {
877 if (old_rows - vc->vc_y < new_rows) {
878 /*
879 * Cursor near the bottom, copy contents from the
880 * bottom of buffer
881 */
882 old_origin += (old_rows - new_rows) * old_row_size;
883 end = vc->vc_scr_end;
884 } else {
885 /*
886 * Cursor is in no man's land, copy 1/2 screenful
887 * from the top and bottom of cursor position
888 */
889 old_origin += (vc->vc_y - new_rows/2) * old_row_size;
065d9cac 890 end = old_origin + (old_row_size * new_rows);
3b41dc1a
AD		 891 }
892 } else
893 /*
894 * Cursor near the top, copy contents from the top of buffer
895 */
065d9cac
AD		 896 end = (old_rows > new_rows) ? old_origin +
897 (old_row_size * new_rows) :
3b41dc1a 898 vc->vc_scr_end;
1da177e4
LT		 899
900 update_attr(vc);
901
3b41dc1a
AD		 902 while (old_origin < end) {
903 scr_memcpyw((unsigned short *) new_origin,
904 (unsigned short *) old_origin, rlth);
1da177e4 905 if (rrem)
3b41dc1a
AD		 906 scr_memsetw((void *)(new_origin + rlth),
907 vc->vc_video_erase_char, rrem);
1da177e4
LT		 908 old_origin += old_row_size;
909 new_origin += new_row_size;
910 }
911 if (new_scr_end > new_origin)
3b41dc1a
AD		 912 scr_memsetw((void *)new_origin, vc->vc_video_erase_char,
913 new_scr_end - new_origin);
1da177e4
LT		 914 if (vc->vc_kmalloced)
915 kfree(vc->vc_screenbuf);
916 vc->vc_screenbuf = newscreen;
917 vc->vc_kmalloced = 1;
918 vc->vc_screenbuf_size = new_screen_size;
919 set_origin(vc);
920
921 /* do part of a reset_terminal() */
922 vc->vc_top = 0;
923 vc->vc_bottom = vc->vc_rows;
924 gotoxy(vc, vc->vc_x, vc->vc_y);
925 save_cur(vc);
926
8c9a9dd0
AC		 927 if (tty) {
928 /* Rewrite the requested winsize data with the actual
929 resulting sizes */
930 struct winsize ws;
1da177e4
LT		 931 memset(&ws, 0, sizeof(ws));
932 ws.ws_row = vc->vc_rows;
933 ws.ws_col = vc->vc_cols;
934 ws.ws_ypixel = vc->vc_scan_lines;
fc6f6238 935 tty_do_resize(tty, &ws);
1da177e4
LT		 936 }
937
938 if (CON_IS_VISIBLE(vc))
939 update_screen(vc);
940 return err;
941}
942
8c9a9dd0
AC		 943/**
944 * vc_resize - resize a VT
945 * @vc: virtual console
946 * @cols: columns
947 * @rows: rows
948 *
949 * Resize a virtual console as seen from the console end of things. We
950 * use the common vc_do_resize methods to update the structures. The
951 * caller must hold the console sem to protect console internals and
952 * vc->vc_tty
953 */
954
955int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int rows)
956{
fc6f6238 957 return vc_do_resize(vc->vc_tty, vc, cols, rows);
8c9a9dd0
AC		 958}
959
960/**
961 * vt_resize - resize a VT
962 * @tty: tty to resize
8c9a9dd0
AC		 963 * @ws: winsize attributes
964 *
965 * Resize a virtual terminal. This is called by the tty layer as we
966 * register our own handler for resizing. The mutual helper does all
967 * the actual work.
968 *
969 * Takes the console sem and the called methods then take the tty
970 * termios_mutex and the tty ctrl_lock in that order.
971 */
da2bdf9a 972static int vt_resize(struct tty_struct *tty, struct winsize *ws)
ca9bda00 973{
8c9a9dd0
AC		 974 struct vc_data *vc = tty->driver_data;
975 int ret;
ca9bda00
AC		 976
977 acquire_console_sem();
fc6f6238 978 ret = vc_do_resize(tty, vc, ws->ws_col, ws->ws_row);
ca9bda00 979 release_console_sem();
8c9a9dd0 980 return ret;
ca9bda00 981}
1da177e4 982
ca9bda00 983void vc_deallocate(unsigned int currcons)
1da177e4
LT		 984{
985 WARN_CONSOLE_UNLOCKED();
986
987 if (vc_cons_allocated(currcons)) {
988 struct vc_data *vc = vc_cons[currcons].d;
b293d758 989 struct vt_notifier_param param = { .vc = vc };
4995f8ef 990
b293d758 991 atomic_notifier_call_chain(&vt_notifier_list, VT_DEALLOCATE, &param);
4995f8ef 992 vcs_remove_sysfs(currcons);
1da177e4 993 vc->vc_sw->con_deinit(vc);
bde0d2c9 994 put_pid(vc->vt_pid);
d459ec0b 995 module_put(vc->vc_sw->owner);
1da177e4
LT		 996 if (vc->vc_kmalloced)
997 kfree(vc->vc_screenbuf);
998 if (currcons >= MIN_NR_CONSOLES)
999 kfree(vc);
1000 vc_cons[currcons].d = NULL;
1001 }
1002}
1003
1004/*
1005 * VT102 emulator
1006 */
1007
1008#define set_kbd(vc, x) set_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1009#define clr_kbd(vc, x) clr_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1010#define is_kbd(vc, x) vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1011
1012#define decarm VC_REPEAT
1013#define decckm VC_CKMODE
1014#define kbdapplic VC_APPLIC
1015#define lnm VC_CRLF
1016
1017/*
1018 * this is what the terminal answers to a ESC-Z or csi0c query.
1019 */
1020#define VT100ID "\033[?1;2c"
1021#define VT102ID "\033[?6c"
1022
1023unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7,
1024 8,12,10,14, 9,13,11,15 };
1025
1026/* the default colour table, for VGA+ colour systems */
1027int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
1028 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
1029int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
1030 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
1031int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
1032 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
1033
1c2bbe6a
JE		 1034module_param_array(default_red, int, NULL, S_IRUGO | S_IWUSR);
1035module_param_array(default_grn, int, NULL, S_IRUGO | S_IWUSR);
1036module_param_array(default_blu, int, NULL, S_IRUGO | S_IWUSR);
1037
1da177e4
LT		 1038/*
1039 * gotoxy() must verify all boundaries, because the arguments
1040 * might also be negative. If the given position is out of
1041 * bounds, the cursor is placed at the nearest margin.
1042 */
1043static void gotoxy(struct vc_data *vc, int new_x, int new_y)
1044{
1045 int min_y, max_y;
1046
1047 if (new_x < 0)
1048 vc->vc_x = 0;
1049 else {
1050 if (new_x >= vc->vc_cols)
1051 vc->vc_x = vc->vc_cols - 1;
1052 else
1053 vc->vc_x = new_x;
1054 }
1055
1056 if (vc->vc_decom) {
1057 min_y = vc->vc_top;
1058 max_y = vc->vc_bottom;
1059 } else {
1060 min_y = 0;
1061 max_y = vc->vc_rows;
1062 }
1063 if (new_y < min_y)
1064 vc->vc_y = min_y;
1065 else if (new_y >= max_y)
1066 vc->vc_y = max_y - 1;
1067 else
1068 vc->vc_y = new_y;
1069 vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1);
1070 vc->vc_need_wrap = 0;
1071}
1072
1073/* for absolute user moves, when decom is set */
1074static void gotoxay(struct vc_data *vc, int new_x, int new_y)
1075{
1076 gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y);
1077}
1078
1079void scrollback(struct vc_data *vc, int lines)
1080{
1081 if (!lines)
1082 lines = vc->vc_rows / 2;
1083 scrolldelta(-lines);
1084}
1085
1086void scrollfront(struct vc_data *vc, int lines)
1087{
1088 if (!lines)
1089 lines = vc->vc_rows / 2;
1090 scrolldelta(lines);
1091}
1092
1093static void lf(struct vc_data *vc)
1094{
1095 /* don't scroll if above bottom of scrolling region, or
1096 * if below scrolling region
1097 */
1098 if (vc->vc_y + 1 == vc->vc_bottom)
1099 scrup(vc, vc->vc_top, vc->vc_bottom, 1);
1100 else if (vc->vc_y < vc->vc_rows - 1) {
1101 vc->vc_y++;
1102 vc->vc_pos += vc->vc_size_row;
1103 }
1104 vc->vc_need_wrap = 0;
b293d758 1105 notify_write(vc, '\n');
1da177e4
LT		 1106}
1107
1108static void ri(struct vc_data *vc)
1109{
1110 /* don't scroll if below top of scrolling region, or
1111 * if above scrolling region
1112 */
1113 if (vc->vc_y == vc->vc_top)
1114 scrdown(vc, vc->vc_top, vc->vc_bottom, 1);
1115 else if (vc->vc_y > 0) {
1116 vc->vc_y--;
1117 vc->vc_pos -= vc->vc_size_row;
1118 }
1119 vc->vc_need_wrap = 0;
1120}
1121
1122static inline void cr(struct vc_data *vc)
1123{
1124 vc->vc_pos -= vc->vc_x << 1;
1125 vc->vc_need_wrap = vc->vc_x = 0;
b293d758 1126 notify_write(vc, '\r');
1da177e4
LT		 1127}
1128
1129static inline void bs(struct vc_data *vc)
1130{
1131 if (vc->vc_x) {
1132 vc->vc_pos -= 2;
1133 vc->vc_x--;
1134 vc->vc_need_wrap = 0;
b293d758 1135 notify_write(vc, '\b');
1da177e4
LT		 1136 }
1137}
1138
1139static inline void del(struct vc_data *vc)
1140{
1141 /* ignored */
1142}
1143
1144static void csi_J(struct vc_data *vc, int vpar)
1145{
1146 unsigned int count;
1147 unsigned short * start;
1148
1149 switch (vpar) {
1150 case 0: /* erase from cursor to end of display */
1151 count = (vc->vc_scr_end - vc->vc_pos) >> 1;
1152 start = (unsigned short *)vc->vc_pos;
1153 if (DO_UPDATE(vc)) {
1154 /* do in two stages */
1155 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1156 vc->vc_cols - vc->vc_x);
1157 vc->vc_sw->con_clear(vc, vc->vc_y + 1, 0,
1158 vc->vc_rows - vc->vc_y - 1,
1159 vc->vc_cols);
1160 }
1161 break;
1162 case 1: /* erase from start to cursor */
1163 count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1;
1164 start = (unsigned short *)vc->vc_origin;
1165 if (DO_UPDATE(vc)) {
1166 /* do in two stages */
1167 vc->vc_sw->con_clear(vc, 0, 0, vc->vc_y,
1168 vc->vc_cols);
1169 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1170 vc->vc_x + 1);
1171 }
1172 break;
1173 case 2: /* erase whole display */
1174 count = vc->vc_cols * vc->vc_rows;
1175 start = (unsigned short *)vc->vc_origin;
1176 if (DO_UPDATE(vc))
1177 vc->vc_sw->con_clear(vc, 0, 0,
1178 vc->vc_rows,
1179 vc->vc_cols);
1180 break;
1181 default:
1182 return;
1183 }
1184 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1185 vc->vc_need_wrap = 0;
1186}
1187
1188static void csi_K(struct vc_data *vc, int vpar)
1189{
1190 unsigned int count;
1191 unsigned short * start;
1192
1193 switch (vpar) {
1194 case 0: /* erase from cursor to end of line */
1195 count = vc->vc_cols - vc->vc_x;
1196 start = (unsigned short *)vc->vc_pos;
1197 if (DO_UPDATE(vc))
1198 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1199 vc->vc_cols - vc->vc_x);
1200 break;
1201 case 1: /* erase from start of line to cursor */
1202 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1203 count = vc->vc_x + 1;
1204 if (DO_UPDATE(vc))
1205 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1206 vc->vc_x + 1);
1207 break;
1208 case 2: /* erase whole line */
1209 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1210 count = vc->vc_cols;
1211 if (DO_UPDATE(vc))
1212 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1213 vc->vc_cols);
1214 break;
1215 default:
1216 return;
1217 }
1218 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1219 vc->vc_need_wrap = 0;
1220}
1221
1222static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */
1223{ /* not vt100? */
1224 int count;
1225
1226 if (!vpar)
1227 vpar++;
1228 count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar;
1229
1230 scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count);
1231 if (DO_UPDATE(vc))
1232 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count);
1233 vc->vc_need_wrap = 0;
1234}
1235
1236static void default_attr(struct vc_data *vc)
1237{
1238 vc->vc_intensity = 1;
fa6ce9ab 1239 vc->vc_italic = 0;
1da177e4
LT		 1240 vc->vc_underline = 0;
1241 vc->vc_reverse = 0;
1242 vc->vc_blink = 0;
1243 vc->vc_color = vc->vc_def_color;
1244}
1245
1246/* console_sem is held */
1247static void csi_m(struct vc_data *vc)
1248{
1249 int i;
1250
1251 for (i = 0; i <= vc->vc_npar; i++)
1252 switch (vc->vc_par[i]) {
1253 case 0: /* all attributes off */
1254 default_attr(vc);
1255 break;
1256 case 1:
1257 vc->vc_intensity = 2;
1258 break;
1259 case 2:
1260 vc->vc_intensity = 0;
1261 break;
fa6ce9ab
JE		 1262 case 3:
1263 vc->vc_italic = 1;
1264 break;
1da177e4
LT		 1265 case 4:
1266 vc->vc_underline = 1;
1267 break;
1268 case 5:
1269 vc->vc_blink = 1;
1270 break;
1271 case 7:
1272 vc->vc_reverse = 1;
1273 break;
1274 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1275 * Select primary font, don't display
1276 * control chars if defined, don't set
1277 * bit 8 on output.
1278 */
1279 vc->vc_translate = set_translate(vc->vc_charset == 0
1280 ? vc->vc_G0_charset
1281 : vc->vc_G1_charset, vc);
1282 vc->vc_disp_ctrl = 0;
1283 vc->vc_toggle_meta = 0;
1284 break;
1285 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1286 * Select first alternate font, lets
1287 * chars < 32 be displayed as ROM chars.
1288 */
1289 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1290 vc->vc_disp_ctrl = 1;
1291 vc->vc_toggle_meta = 0;
1292 break;
1293 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1294 * Select second alternate font, toggle
1295 * high bit before displaying as ROM char.
1296 */
1297 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1298 vc->vc_disp_ctrl = 1;
1299 vc->vc_toggle_meta = 1;
1300 break;
1301 case 21:
1302 case 22:
1303 vc->vc_intensity = 1;
1304 break;
fa6ce9ab
JE		 1305 case 23:
1306 vc->vc_italic = 0;
1307 break;
1da177e4
LT		 1308 case 24:
1309 vc->vc_underline = 0;
1310 break;
1311 case 25:
1312 vc->vc_blink = 0;
1313 break;
1314 case 27:
1315 vc->vc_reverse = 0;
1316 break;
1317 case 38: /* ANSI X3.64-1979 (SCO-ish?)
1318 * Enables underscore, white foreground
1319 * with white underscore (Linux - use
1320 * default foreground).
1321 */
1322 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1323 vc->vc_underline = 1;
1324 break;
1325 case 39: /* ANSI X3.64-1979 (SCO-ish?)
1326 * Disable underline option.
1327 * Reset colour to default? It did this
1328 * before...
1329 */
1330 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1331 vc->vc_underline = 0;
1332 break;
1333 case 49:
1334 vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f);
1335 break;
1336 default:
1337 if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37)
1338 vc->vc_color = color_table[vc->vc_par[i] - 30]
1339 | (vc->vc_color & 0xf0);
1340 else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47)
1341 vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4)
1342 | (vc->vc_color & 0x0f);
1343 break;
1344 }
1345 update_attr(vc);
1346}
1347
1348static void respond_string(const char *p, struct tty_struct *tty)
1349{
1350 while (*p) {
1351 tty_insert_flip_char(tty, *p, 0);
1352 p++;
1353 }
1354 con_schedule_flip(tty);
1355}
1356
1357static void cursor_report(struct vc_data *vc, struct tty_struct *tty)
1358{
1359 char buf[40];
1360
1361 sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1);
1362 respond_string(buf, tty);
1363}
1364
1365static inline void status_report(struct tty_struct *tty)
1366{
1367 respond_string("\033[0n", tty); /* Terminal ok */
1368}
1369
1370static inline void respond_ID(struct tty_struct * tty)
1371{
1372 respond_string(VT102ID, tty);
1373}
1374
1375void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry)
1376{
1377 char buf[8];
1378
1379 sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx),
1380 (char)('!' + mry));
1381 respond_string(buf, tty);
1382}
1383
1384/* invoked via ioctl(TIOCLINUX) and through set_selection */
1385int mouse_reporting(void)
1386{
1387 return vc_cons[fg_console].d->vc_report_mouse;
1388}
1389
1390/* console_sem is held */
1391static void set_mode(struct vc_data *vc, int on_off)
1392{
1393 int i;
1394
1395 for (i = 0; i <= vc->vc_npar; i++)
1396 if (vc->vc_ques) {
1397 switch(vc->vc_par[i]) { /* DEC private modes set/reset */
1398 case 1: /* Cursor keys send ^[Ox/^[[x */
1399 if (on_off)
1400 set_kbd(vc, decckm);
1401 else
1402 clr_kbd(vc, decckm);
1403 break;
1404 case 3: /* 80/132 mode switch unimplemented */
1405 vc->vc_deccolm = on_off;
1406#if 0
1407 vc_resize(deccolm ? 132 : 80, vc->vc_rows);
1408 /* this alone does not suffice; some user mode
1409 utility has to change the hardware regs */
1410#endif
1411 break;
1412 case 5: /* Inverted screen on/off */
1413 if (vc->vc_decscnm != on_off) {
1414 vc->vc_decscnm = on_off;
1415 invert_screen(vc, 0, vc->vc_screenbuf_size, 0);
1416 update_attr(vc);
1417 }
1418 break;
1419 case 6: /* Origin relative/absolute */
1420 vc->vc_decom = on_off;
1421 gotoxay(vc, 0, 0);
1422 break;
1423 case 7: /* Autowrap on/off */
1424 vc->vc_decawm = on_off;
1425 break;
1426 case 8: /* Autorepeat on/off */
1427 if (on_off)
1428 set_kbd(vc, decarm);
1429 else
1430 clr_kbd(vc, decarm);
1431 break;
1432 case 9:
1433 vc->vc_report_mouse = on_off ? 1 : 0;
1434 break;
1435 case 25: /* Cursor on/off */
1436 vc->vc_deccm = on_off;
1437 break;
1438 case 1000:
1439 vc->vc_report_mouse = on_off ? 2 : 0;
1440 break;
1441 }
1442 } else {
1443 switch(vc->vc_par[i]) { /* ANSI modes set/reset */
1444 case 3: /* Monitor (display ctrls) */
1445 vc->vc_disp_ctrl = on_off;
1446 break;
1447 case 4: /* Insert Mode on/off */
1448 vc->vc_decim = on_off;
1449 break;
1450 case 20: /* Lf, Enter == CrLf/Lf */
1451 if (on_off)
1452 set_kbd(vc, lnm);
1453 else
1454 clr_kbd(vc, lnm);
1455 break;
1456 }
1457 }
1458}
1459
1460/* console_sem is held */
1461static void setterm_command(struct vc_data *vc)
1462{
1463 switch(vc->vc_par[0]) {
1464 case 1: /* set color for underline mode */
1465 if (vc->vc_can_do_color &&
1466 vc->vc_par[1] < 16) {
1467 vc->vc_ulcolor = color_table[vc->vc_par[1]];
1468 if (vc->vc_underline)
1469 update_attr(vc);
1470 }
1471 break;
1472 case 2: /* set color for half intensity mode */
1473 if (vc->vc_can_do_color &&
1474 vc->vc_par[1] < 16) {
1475 vc->vc_halfcolor = color_table[vc->vc_par[1]];
1476 if (vc->vc_intensity == 0)
1477 update_attr(vc);
1478 }
1479 break;
1480 case 8: /* store colors as defaults */
1481 vc->vc_def_color = vc->vc_attr;
1482 if (vc->vc_hi_font_mask == 0x100)
1483 vc->vc_def_color >>= 1;
1484 default_attr(vc);
1485 update_attr(vc);
1486 break;
1487 case 9: /* set blanking interval */
1488 blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1489 poke_blanked_console();
1490 break;
1491 case 10: /* set bell frequency in Hz */
1492 if (vc->vc_npar >= 1)
1493 vc->vc_bell_pitch = vc->vc_par[1];
1494 else
1495 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1496 break;
1497 case 11: /* set bell duration in msec */
1498 if (vc->vc_npar >= 1)
1499 vc->vc_bell_duration = (vc->vc_par[1] < 2000) ?
1500 vc->vc_par[1] * HZ / 1000 : 0;
1501 else
1502 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1503 break;
1504 case 12: /* bring specified console to the front */
1505 if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1))
1506 set_console(vc->vc_par[1] - 1);
1507 break;
1508 case 13: /* unblank the screen */
1509 poke_blanked_console();
1510 break;
1511 case 14: /* set vesa powerdown interval */
1512 vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1513 break;
1514 case 15: /* activate the previous console */
1515 set_console(last_console);
1516 break;
1517 }
1518}
1519
1520/* console_sem is held */
1521static void csi_at(struct vc_data *vc, unsigned int nr)
1522{
1523 if (nr > vc->vc_cols - vc->vc_x)
1524 nr = vc->vc_cols - vc->vc_x;
1525 else if (!nr)
1526 nr = 1;
1527 insert_char(vc, nr);
1528}
1529
1530/* console_sem is held */
1531static void csi_L(struct vc_data *vc, unsigned int nr)
1532{
1533 if (nr > vc->vc_rows - vc->vc_y)
1534 nr = vc->vc_rows - vc->vc_y;
1535 else if (!nr)
1536 nr = 1;
1537 scrdown(vc, vc->vc_y, vc->vc_bottom, nr);
1538 vc->vc_need_wrap = 0;
1539}
1540
1541/* console_sem is held */
1542static void csi_P(struct vc_data *vc, unsigned int nr)
1543{
1544 if (nr > vc->vc_cols - vc->vc_x)
1545 nr = vc->vc_cols - vc->vc_x;
1546 else if (!nr)
1547 nr = 1;
1548 delete_char(vc, nr);
1549}
1550
1551/* console_sem is held */
1552static void csi_M(struct vc_data *vc, unsigned int nr)
1553{
1554 if (nr > vc->vc_rows - vc->vc_y)
1555 nr = vc->vc_rows - vc->vc_y;
1556 else if (!nr)
1557 nr=1;
1558 scrup(vc, vc->vc_y, vc->vc_bottom, nr);
1559 vc->vc_need_wrap = 0;
1560}
1561
1562/* console_sem is held (except via vc_init->reset_terminal */
1563static void save_cur(struct vc_data *vc)
1564{
1565 vc->vc_saved_x = vc->vc_x;
1566 vc->vc_saved_y = vc->vc_y;
1567 vc->vc_s_intensity = vc->vc_intensity;
fa6ce9ab 1568 vc->vc_s_italic = vc->vc_italic;
1da177e4
LT		 1569 vc->vc_s_underline = vc->vc_underline;
1570 vc->vc_s_blink = vc->vc_blink;
1571 vc->vc_s_reverse = vc->vc_reverse;
1572 vc->vc_s_charset = vc->vc_charset;
1573 vc->vc_s_color = vc->vc_color;
1574 vc->vc_saved_G0 = vc->vc_G0_charset;
1575 vc->vc_saved_G1 = vc->vc_G1_charset;
1576}
1577
1578/* console_sem is held */
1579static void restore_cur(struct vc_data *vc)
1580{
1581 gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y);
1582 vc->vc_intensity = vc->vc_s_intensity;
fa6ce9ab 1583 vc->vc_italic = vc->vc_s_italic;
1da177e4
LT		 1584 vc->vc_underline = vc->vc_s_underline;
1585 vc->vc_blink = vc->vc_s_blink;
1586 vc->vc_reverse = vc->vc_s_reverse;
1587 vc->vc_charset = vc->vc_s_charset;
1588 vc->vc_color = vc->vc_s_color;
1589 vc->vc_G0_charset = vc->vc_saved_G0;
1590 vc->vc_G1_charset = vc->vc_saved_G1;
1591 vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc);
1592 update_attr(vc);
1593 vc->vc_need_wrap = 0;
1594}
1595
1596enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey,
1597 EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd,
1598 ESpalette };
1599
1600/* console_sem is held (except via vc_init()) */
1601static void reset_terminal(struct vc_data *vc, int do_clear)
1602{
1603 vc->vc_top = 0;
1604 vc->vc_bottom = vc->vc_rows;
1605 vc->vc_state = ESnormal;
1606 vc->vc_ques = 0;
1607 vc->vc_translate = set_translate(LAT1_MAP, vc);
1608 vc->vc_G0_charset = LAT1_MAP;
1609 vc->vc_G1_charset = GRAF_MAP;
1610 vc->vc_charset = 0;
1611 vc->vc_need_wrap = 0;
1612 vc->vc_report_mouse = 0;
042f10ec 1613 vc->vc_utf = default_utf8;
1da177e4
LT		 1614 vc->vc_utf_count = 0;
1615
1616 vc->vc_disp_ctrl = 0;
1617 vc->vc_toggle_meta = 0;
1618
1619 vc->vc_decscnm = 0;
1620 vc->vc_decom = 0;
1621 vc->vc_decawm = 1;
1622 vc->vc_deccm = 1;
1623 vc->vc_decim = 0;
1624
1625 set_kbd(vc, decarm);
1626 clr_kbd(vc, decckm);
1627 clr_kbd(vc, kbdapplic);
1628 clr_kbd(vc, lnm);
1629 kbd_table[vc->vc_num].lockstate = 0;
1630 kbd_table[vc->vc_num].slockstate = 0;
1631 kbd_table[vc->vc_num].ledmode = LED_SHOW_FLAGS;
1632 kbd_table[vc->vc_num].ledflagstate = kbd_table[vc->vc_num].default_ledflagstate;
1633 /* do not do set_leds here because this causes an endless tasklet loop
1634 when the keyboard hasn't been initialized yet */
1635
1636 vc->vc_cursor_type = CUR_DEFAULT;
1637 vc->vc_complement_mask = vc->vc_s_complement_mask;
1638
1639 default_attr(vc);
1640 update_attr(vc);
1641
1642 vc->vc_tab_stop[0] = 0x01010100;
1643 vc->vc_tab_stop[1] =
1644 vc->vc_tab_stop[2] =
1645 vc->vc_tab_stop[3] =
a564738c
WK		 1646 vc->vc_tab_stop[4] =
1647 vc->vc_tab_stop[5] =
1648 vc->vc_tab_stop[6] =
1649 vc->vc_tab_stop[7] = 0x01010101;
1da177e4
LT		 1650
1651 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1652 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1653
1654 gotoxy(vc, 0, 0);
1655 save_cur(vc);
1656 if (do_clear)
1657 csi_J(vc, 2);
1658}
1659
1660/* console_sem is held */
1661static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
1662{
1663 /*
1664 * Control characters can be used in the _middle_
1665 * of an escape sequence.
1666 */
1667 switch (c) {
1668 case 0:
1669 return;
1670 case 7:
1671 if (vc->vc_bell_duration)
1672 kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration);
1673 return;
1674 case 8:
1675 bs(vc);
1676 return;
1677 case 9:
1678 vc->vc_pos -= (vc->vc_x << 1);
1679 while (vc->vc_x < vc->vc_cols - 1) {
1680 vc->vc_x++;
1681 if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31)))
1682 break;
1683 }
1684 vc->vc_pos += (vc->vc_x << 1);
b293d758 1685 notify_write(vc, '\t');
1da177e4
LT		 1686 return;
1687 case 10: case 11: case 12:
1688 lf(vc);
1689 if (!is_kbd(vc, lnm))
1690 return;
1691 case 13:
1692 cr(vc);
1693 return;
1694 case 14:
1695 vc->vc_charset = 1;
1696 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1697 vc->vc_disp_ctrl = 1;
1698 return;
1699 case 15:
1700 vc->vc_charset = 0;
1701 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1702 vc->vc_disp_ctrl = 0;
1703 return;
1704 case 24: case 26:
1705 vc->vc_state = ESnormal;
1706 return;
1707 case 27:
1708 vc->vc_state = ESesc;
1709 return;
1710 case 127:
1711 del(vc);
1712 return;
1713 case 128+27:
1714 vc->vc_state = ESsquare;
1715 return;
1716 }
1717 switch(vc->vc_state) {
1718 case ESesc:
1719 vc->vc_state = ESnormal;
1720 switch (c) {
1721 case '[':
1722 vc->vc_state = ESsquare;
1723 return;
1724 case ']':
1725 vc->vc_state = ESnonstd;
1726 return;
1727 case '%':
1728 vc->vc_state = ESpercent;
1729 return;
1730 case 'E':
1731 cr(vc);
1732 lf(vc);
1733 return;
1734 case 'M':
1735 ri(vc);
1736 return;
1737 case 'D':
1738 lf(vc);
1739 return;
1740 case 'H':
1741 vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31));
1742 return;
1743 case 'Z':
1744 respond_ID(tty);
1745 return;
1746 case '7':
1747 save_cur(vc);
1748 return;
1749 case '8':
1750 restore_cur(vc);
1751 return;
1752 case '(':
1753 vc->vc_state = ESsetG0;
1754 return;
1755 case ')':
1756 vc->vc_state = ESsetG1;
1757 return;
1758 case '#':
1759 vc->vc_state = EShash;
1760 return;
1761 case 'c':
1762 reset_terminal(vc, 1);
1763 return;
1764 case '>': /* Numeric keypad */
1765 clr_kbd(vc, kbdapplic);
1766 return;
1767 case '=': /* Appl. keypad */
1768 set_kbd(vc, kbdapplic);
1769 return;
1770 }
1771 return;
1772 case ESnonstd:
1773 if (c=='P') { /* palette escape sequence */
1774 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1775 vc->vc_par[vc->vc_npar] = 0;
1776 vc->vc_npar = 0;
1777 vc->vc_state = ESpalette;
1778 return;
1779 } else if (c=='R') { /* reset palette */
1780 reset_palette(vc);
1781 vc->vc_state = ESnormal;
1782 } else
1783 vc->vc_state = ESnormal;
1784 return;
1785 case ESpalette:
1786 if ( (c>='0'&&c<='9') || (c>='A'&&c<='F') || (c>='a'&&c<='f') ) {
1787 vc->vc_par[vc->vc_npar++] = (c > '9' ? (c & 0xDF) - 'A' + 10 : c - '0');
1788 if (vc->vc_npar == 7) {
1789 int i = vc->vc_par[0] * 3, j = 1;
1790 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1791 vc->vc_palette[i++] += vc->vc_par[j++];
1792 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1793 vc->vc_palette[i++] += vc->vc_par[j++];
1794 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1795 vc->vc_palette[i] += vc->vc_par[j];
1796 set_palette(vc);
1797 vc->vc_state = ESnormal;
1798 }
1799 } else
1800 vc->vc_state = ESnormal;
1801 return;
1802 case ESsquare:
1803 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1804 vc->vc_par[vc->vc_npar] = 0;
1805 vc->vc_npar = 0;
1806 vc->vc_state = ESgetpars;
1807 if (c == '[') { /* Function key */
1808 vc->vc_state=ESfunckey;
1809 return;
1810 }
1811 vc->vc_ques = (c == '?');
1812 if (vc->vc_ques)
1813 return;
1814 case ESgetpars:
1815 if (c == ';' && vc->vc_npar < NPAR - 1) {
1816 vc->vc_npar++;
1817 return;
1818 } else if (c>='0' && c<='9') {
1819 vc->vc_par[vc->vc_npar] *= 10;
1820 vc->vc_par[vc->vc_npar] += c - '0';
1821 return;
1822 } else
1823 vc->vc_state = ESgotpars;
1824 case ESgotpars:
1825 vc->vc_state = ESnormal;
1826 switch(c) {
1827 case 'h':
1828 set_mode(vc, 1);
1829 return;
1830 case 'l':
1831 set_mode(vc, 0);
1832 return;
1833 case 'c':
1834 if (vc->vc_ques) {
1835 if (vc->vc_par[0])
1836 vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16);
1837 else
1838 vc->vc_cursor_type = CUR_DEFAULT;
1839 return;
1840 }
1841 break;
1842 case 'm':
1843 if (vc->vc_ques) {
1844 clear_selection();
1845 if (vc->vc_par[0])
1846 vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1];
1847 else
1848 vc->vc_complement_mask = vc->vc_s_complement_mask;
1849 return;
1850 }
1851 break;
1852 case 'n':
1853 if (!vc->vc_ques) {
1854 if (vc->vc_par[0] == 5)
1855 status_report(tty);
1856 else if (vc->vc_par[0] == 6)
1857 cursor_report(vc, tty);
1858 }
1859 return;
1860 }
1861 if (vc->vc_ques) {
1862 vc->vc_ques = 0;
1863 return;
1864 }
1865 switch(c) {
1866 case 'G': case '`':
1867 if (vc->vc_par[0])
1868 vc->vc_par[0]--;
1869 gotoxy(vc, vc->vc_par[0], vc->vc_y);
1870 return;
1871 case 'A':
1872 if (!vc->vc_par[0])
1873 vc->vc_par[0]++;
1874 gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]);
1875 return;
1876 case 'B': case 'e':
1877 if (!vc->vc_par[0])
1878 vc->vc_par[0]++;
1879 gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]);
1880 return;
1881 case 'C': case 'a':
1882 if (!vc->vc_par[0])
1883 vc->vc_par[0]++;
1884 gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y);
1885 return;
1886 case 'D':
1887 if (!vc->vc_par[0])
1888 vc->vc_par[0]++;
1889 gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y);
1890 return;
1891 case 'E':
1892 if (!vc->vc_par[0])
1893 vc->vc_par[0]++;
1894 gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]);
1895 return;
1896 case 'F':
1897 if (!vc->vc_par[0])
1898 vc->vc_par[0]++;
1899 gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]);
1900 return;
1901 case 'd':
1902 if (vc->vc_par[0])
1903 vc->vc_par[0]--;
1904 gotoxay(vc, vc->vc_x ,vc->vc_par[0]);
1905 return;
1906 case 'H': case 'f':
1907 if (vc->vc_par[0])
1908 vc->vc_par[0]--;
1909 if (vc->vc_par[1])
1910 vc->vc_par[1]--;
1911 gotoxay(vc, vc->vc_par[1], vc->vc_par[0]);
1912 return;
1913 case 'J':
1914 csi_J(vc, vc->vc_par[0]);
1915 return;
1916 case 'K':
1917 csi_K(vc, vc->vc_par[0]);
1918 return;
1919 case 'L':
1920 csi_L(vc, vc->vc_par[0]);
1921 return;
1922 case 'M':
1923 csi_M(vc, vc->vc_par[0]);
1924 return;
1925 case 'P':
1926 csi_P(vc, vc->vc_par[0]);
1927 return;
1928 case 'c':
1929 if (!vc->vc_par[0])
1930 respond_ID(tty);
1931 return;
1932 case 'g':
1933 if (!vc->vc_par[0])
1934 vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31));
1935 else if (vc->vc_par[0] == 3) {
1936 vc->vc_tab_stop[0] =
1937 vc->vc_tab_stop[1] =
1938 vc->vc_tab_stop[2] =
1939 vc->vc_tab_stop[3] =
a564738c
WK		 1940 vc->vc_tab_stop[4] =
1941 vc->vc_tab_stop[5] =
1942 vc->vc_tab_stop[6] =
1943 vc->vc_tab_stop[7] = 0;
1da177e4
LT		 1944 }
1945 return;
1946 case 'm':
1947 csi_m(vc);
1948 return;
1949 case 'q': /* DECLL - but only 3 leds */
1950 /* map 0,1,2,3 to 0,1,2,4 */
1951 if (vc->vc_par[0] < 4)
1952 setledstate(kbd_table + vc->vc_num,
1953 (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4);
1954 return;
1955 case 'r':
1956 if (!vc->vc_par[0])
1957 vc->vc_par[0]++;
1958 if (!vc->vc_par[1])
1959 vc->vc_par[1] = vc->vc_rows;
1960 /* Minimum allowed region is 2 lines */
1961 if (vc->vc_par[0] < vc->vc_par[1] &&
1962 vc->vc_par[1] <= vc->vc_rows) {
1963 vc->vc_top = vc->vc_par[0] - 1;
1964 vc->vc_bottom = vc->vc_par[1];
1965 gotoxay(vc, 0, 0);
1966 }
1967 return;
1968 case 's':
1969 save_cur(vc);
1970 return;
1971 case 'u':
1972 restore_cur(vc);
1973 return;
1974 case 'X':
1975 csi_X(vc, vc->vc_par[0]);
1976 return;
1977 case '@':
1978 csi_at(vc, vc->vc_par[0]);
1979 return;
1980 case ']': /* setterm functions */
1981 setterm_command(vc);
1982 return;
1983 }
1984 return;
1985 case ESpercent:
1986 vc->vc_state = ESnormal;
1987 switch (c) {
1988 case '@': /* defined in ISO 2022 */
1989 vc->vc_utf = 0;
1990 return;
1991 case 'G': /* prelim official escape code */
1992 case '8': /* retained for compatibility */
1993 vc->vc_utf = 1;
1994 return;
1995 }
1996 return;
1997 case ESfunckey:
1998 vc->vc_state = ESnormal;
1999 return;
2000 case EShash:
2001 vc->vc_state = ESnormal;
2002 if (c == '8') {
2003 /* DEC screen alignment test. kludge :-) */
2004 vc->vc_video_erase_char =
2005 (vc->vc_video_erase_char & 0xff00) | 'E';
2006 csi_J(vc, 2);
2007 vc->vc_video_erase_char =
2008 (vc->vc_video_erase_char & 0xff00) | ' ';
2009 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
2010 }
2011 return;
2012 case ESsetG0:
2013 if (c == '0')
2014 vc->vc_G0_charset = GRAF_MAP;
2015 else if (c == 'B')
2016 vc->vc_G0_charset = LAT1_MAP;
2017 else if (c == 'U')
2018 vc->vc_G0_charset = IBMPC_MAP;
2019 else if (c == 'K')
2020 vc->vc_G0_charset = USER_MAP;
2021 if (vc->vc_charset == 0)
2022 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
2023 vc->vc_state = ESnormal;
2024 return;
2025 case ESsetG1:
2026 if (c == '0')
2027 vc->vc_G1_charset = GRAF_MAP;
2028 else if (c == 'B')
2029 vc->vc_G1_charset = LAT1_MAP;
2030 else if (c == 'U')
2031 vc->vc_G1_charset = IBMPC_MAP;
2032 else if (c == 'K')
2033 vc->vc_G1_charset = USER_MAP;
2034 if (vc->vc_charset == 1)
2035 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
2036 vc->vc_state = ESnormal;
2037 return;
2038 default:
2039 vc->vc_state = ESnormal;
2040 }
2041}
2042
2043/* This is a temporary buffer used to prepare a tty console write
2044 * so that we can easily avoid touching user space while holding the
2045 * console spinlock. It is allocated in con_init and is shared by
2046 * this code and the vc_screen read/write tty calls.
2047 *
2048 * We have to allocate this statically in the kernel data section
2049 * since console_init (and thus con_init) are called before any
2050 * kernel memory allocation is available.
2051 */
2052char con_buf[CON_BUF_SIZE];
c831c338 2053DEFINE_MUTEX(con_buf_mtx);
1da177e4 2054
2f1a2ccb 2055/* is_double_width() is based on the wcwidth() implementation by
1ed8a2b3 2056 * Markus Kuhn -- 2007-05-26 (Unicode 5.0)
2f1a2ccb
EK		 2057 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
2058 */
2059struct interval {
2060 uint32_t first;
2061 uint32_t last;
2062};
2063
2064static int bisearch(uint32_t ucs, const struct interval *table, int max)
2065{
2066 int min = 0;
2067 int mid;
2068
2069 if (ucs < table[0].first || ucs > table[max].last)
2070 return 0;
2071 while (max >= min) {
2072 mid = (min + max) / 2;
2073 if (ucs > table[mid].last)
2074 min = mid + 1;
2075 else if (ucs < table[mid].first)
2076 max = mid - 1;
2077 else
2078 return 1;
2079 }
2080 return 0;
2081}
2082
2083static int is_double_width(uint32_t ucs)
2084{
2085 static const struct interval double_width[] = {
2086 { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E },
2087 { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF },
1ed8a2b3
EK		 2088 { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 },
2089 { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD }
2f1a2ccb 2090 };
0f11541b 2091 return bisearch(ucs, double_width, ARRAY_SIZE(double_width) - 1);
2f1a2ccb
EK		 2092}
2093
1da177e4
LT		 2094/* acquires console_sem */
2095static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2096{
2097#ifdef VT_BUF_VRAM_ONLY
2098#define FLUSH do { } while(0);
2099#else
2100#define FLUSH if (draw_x >= 0) { \
2101 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
2102 draw_x = -1; \
2103 }
2104#endif
2105
2106 int c, tc, ok, n = 0, draw_x = -1;
2107 unsigned int currcons;
2108 unsigned long draw_from = 0, draw_to = 0;
2109 struct vc_data *vc;
2f1a2ccb 2110 unsigned char vc_attr;
0341a4d0 2111 struct vt_notifier_param param;
2f1a2ccb
EK		 2112 uint8_t rescan;
2113 uint8_t inverse;
2114 uint8_t width;
1da177e4
LT		 2115 u16 himask, charmask;
2116 const unsigned char *orig_buf = NULL;
2117 int orig_count;
2118
2119 if (in_interrupt())
2120 return count;
2121
2122 might_sleep();
2123
2124 acquire_console_sem();
2125 vc = tty->driver_data;
2126 if (vc == NULL) {
2127 printk(KERN_ERR "vt: argh, driver_data is NULL !\n");
2128 release_console_sem();
2129 return 0;
2130 }
2131
2132 currcons = vc->vc_num;
2133 if (!vc_cons_allocated(currcons)) {
2134 /* could this happen? */
2135 static int error = 0;
2136 if (!error) {
2137 error = 1;
2138 printk("con_write: tty %d not allocated\n", currcons+1);
2139 }
2140 release_console_sem();
2141 return 0;
2142 }
1da177e4
LT		 2143 orig_buf = buf;
2144 orig_count = count;
2145
1da177e4
LT		 2146 himask = vc->vc_hi_font_mask;
2147 charmask = himask ? 0x1ff : 0xff;
2148
2149 /* undraw cursor first */
2150 if (IS_FG(vc))
2151 hide_cursor(vc);
2152
0341a4d0
KD		 2153 param.vc = vc;
2154
1da177e4
LT		 2155 while (!tty->stopped && count) {
2156 int orig = *buf;
2157 c = orig;
2158 buf++;
2159 n++;
2160 count--;
2f1a2ccb
EK		 2161 rescan = 0;
2162 inverse = 0;
2163 width = 1;
1da177e4
LT		 2164
2165 /* Do no translation at all in control states */
2166 if (vc->vc_state != ESnormal) {
2167 tc = c;
d4328b40 2168 } else if (vc->vc_utf && !vc->vc_disp_ctrl) {
2f1a2ccb
EK		 2169 /* Combine UTF-8 into Unicode in vc_utf_char.
2170 * vc_utf_count is the number of continuation bytes still
2171 * expected to arrive.
2172 * vc_npar is the number of continuation bytes arrived so
2173 * far
2174 */
d4328b40 2175rescan_last_byte:
2f1a2ccb
EK		 2176 if ((c & 0xc0) == 0x80) {
2177 /* Continuation byte received */
2178 static const uint32_t utf8_length_changes[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff };
d4328b40 2179 if (vc->vc_utf_count) {
2f1a2ccb
EK		 2180 vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f);
2181 vc->vc_npar++;
2182 if (--vc->vc_utf_count) {
2183 /* Still need some bytes */
1da177e4 2184 continue;
2f1a2ccb
EK		 2185 }
2186 /* Got a whole character */
2187 c = vc->vc_utf_char;
2188 /* Reject overlong sequences */
2189 if (c <= utf8_length_changes[vc->vc_npar - 1] ||
2190 c > utf8_length_changes[vc->vc_npar])
2191 c = 0xfffd;
2192 } else {
2193 /* Unexpected continuation byte */
2194 vc->vc_utf_count = 0;
2195 c = 0xfffd;
2196 }
1da177e4 2197 } else {
2f1a2ccb
EK		 2198 /* Single ASCII byte or first byte of a sequence received */
2199 if (vc->vc_utf_count) {
2200 /* Continuation byte expected */
2201 rescan = 1;
2202 vc->vc_utf_count = 0;
2203 c = 0xfffd;
2204 } else if (c > 0x7f) {
2205 /* First byte of a multibyte sequence received */
2206 vc->vc_npar = 0;
2207 if ((c & 0xe0) == 0xc0) {
2208 vc->vc_utf_count = 1;
2209 vc->vc_utf_char = (c & 0x1f);
2210 } else if ((c & 0xf0) == 0xe0) {
2211 vc->vc_utf_count = 2;
2212 vc->vc_utf_char = (c & 0x0f);
2213 } else if ((c & 0xf8) == 0xf0) {
2214 vc->vc_utf_count = 3;
2215 vc->vc_utf_char = (c & 0x07);
2216 } else if ((c & 0xfc) == 0xf8) {
2217 vc->vc_utf_count = 4;
2218 vc->vc_utf_char = (c & 0x03);
2219 } else if ((c & 0xfe) == 0xfc) {
2220 vc->vc_utf_count = 5;
2221 vc->vc_utf_char = (c & 0x01);
2222 } else {
2223 /* 254 and 255 are invalid */
2224 c = 0xfffd;
2225 }
2226 if (vc->vc_utf_count) {
2227 /* Still need some bytes */
2228 continue;
2229 }
2230 }
2231 /* Nothing to do if an ASCII byte was received */
1da177e4 2232 }
2f1a2ccb
EK		 2233 /* End of UTF-8 decoding. */
2234 /* c is the received character, or U+FFFD for invalid sequences. */
2235 /* Replace invalid Unicode code points with U+FFFD too */
2236 if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff)
2237 c = 0xfffd;
2238 tc = c;
d4328b40 2239 } else { /* no utf or alternate charset mode */
a29ccf6f 2240 tc = vc_translate(vc, c);
1da177e4
LT		 2241 }
2242
0341a4d0
KD		 2243 param.c = tc;
2244 if (atomic_notifier_call_chain(&vt_notifier_list, VT_PREWRITE,
2245 &param) == NOTIFY_STOP)
2246 continue;
2247
1da177e4
LT		 2248 /* If the original code was a control character we
2249 * only allow a glyph to be displayed if the code is
2250 * not normally used (such as for cursor movement) or
2251 * if the disp_ctrl mode has been explicitly enabled.
2252 * Certain characters (as given by the CTRL_ALWAYS
2253 * bitmap) are always displayed as control characters,
2254 * as the console would be pretty useless without
2255 * them; to display an arbitrary font position use the
2256 * direct-to-font zone in UTF-8 mode.
2257 */
2258 ok = tc && (c >= 32 ||
d4328b40
AT		 2259 !(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 :
2260 vc->vc_utf || ((CTRL_ACTION >> c) & 1)))
1da177e4
LT		 2261 && (c != 127 || vc->vc_disp_ctrl)
2262 && (c != 128+27);
2263
2264 if (vc->vc_state == ESnormal && ok) {
2f1a2ccb
EK		 2265 if (vc->vc_utf && !vc->vc_disp_ctrl) {
2266 if (is_double_width(c))
2267 width = 2;
2268 }
1da177e4
LT		 2269 /* Now try to find out how to display it */
2270 tc = conv_uni_to_pc(vc, tc);
d4328b40 2271 if (tc & ~charmask) {
2f1a2ccb
EK		 2272 if (tc == -1 || tc == -2) {
2273 continue; /* nothing to display */
2274 }
2275 /* Glyph not found */
c0b79882 2276 if ((!(vc->vc_utf && !vc->vc_disp_ctrl) || c < 128) && !(c & ~charmask)) {
2f1a2ccb 2277 /* In legacy mode use the glyph we get by a 1:1 mapping.
1ed8a2b3
EK		 2278 This would make absolutely no sense with Unicode in mind,
2279 but do this for ASCII characters since a font may lack
2280 Unicode mapping info and we don't want to end up with
2281 having question marks only. */
2f1a2ccb
EK		 2282 tc = c;
2283 } else {
2284 /* Display U+FFFD. If it's not found, display an inverse question mark. */
2285 tc = conv_uni_to_pc(vc, 0xfffd);
2286 if (tc < 0) {
2287 inverse = 1;
2288 tc = conv_uni_to_pc(vc, '?');
2289 if (tc < 0) tc = '?';
2290 }
2291 }
d4328b40 2292 }
1da177e4 2293
2f1a2ccb
EK		 2294 if (!inverse) {
2295 vc_attr = vc->vc_attr;
1da177e4 2296 } else {
2f1a2ccb
EK		 2297 /* invert vc_attr */
2298 if (!vc->vc_can_do_color) {
2299 vc_attr = (vc->vc_attr) ^ 0x08;
2300 } else if (vc->vc_hi_font_mask == 0x100) {
2301 vc_attr = ((vc->vc_attr) & 0x11) | (((vc->vc_attr) & 0xe0) >> 4) | (((vc->vc_attr) & 0x0e) << 4);
2302 } else {
2303 vc_attr = ((vc->vc_attr) & 0x88) | (((vc->vc_attr) & 0x70) >> 4) | (((vc->vc_attr) & 0x07) << 4);
2304 }
1ed8a2b3 2305 FLUSH
1da177e4 2306 }
2f1a2ccb
EK		 2307
2308 while (1) {
2309 if (vc->vc_need_wrap || vc->vc_decim)
2310 FLUSH
2311 if (vc->vc_need_wrap) {
2312 cr(vc);
2313 lf(vc);
2314 }
2315 if (vc->vc_decim)
2316 insert_char(vc, 1);
2317 scr_writew(himask ?
2318 ((vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) :
2319 (vc_attr << 8) + tc,
2320 (u16 *) vc->vc_pos);
2321 if (DO_UPDATE(vc) && draw_x < 0) {
2322 draw_x = vc->vc_x;
2323 draw_from = vc->vc_pos;
2324 }
2325 if (vc->vc_x == vc->vc_cols - 1) {
2326 vc->vc_need_wrap = vc->vc_decawm;
2327 draw_to = vc->vc_pos + 2;
2328 } else {
2329 vc->vc_x++;
2330 draw_to = (vc->vc_pos += 2);
d4328b40 2331 }
2f1a2ccb
EK		 2332
2333 if (!--width) break;
2334
2335 tc = conv_uni_to_pc(vc, ' '); /* A space is printed in the second column */
2336 if (tc < 0) tc = ' ';
2337 }
b293d758 2338 notify_write(vc, c);
2f1a2ccb 2339
1ed8a2b3
EK		 2340 if (inverse) {
2341 FLUSH
2342 }
2343
2f1a2ccb
EK		 2344 if (rescan) {
2345 rescan = 0;
2346 inverse = 0;
2347 width = 1;
d4328b40
AT		 2348 c = orig;
2349 goto rescan_last_byte;
2350 }
1da177e4
LT		 2351 continue;
2352 }
2353 FLUSH
2354 do_con_trol(tty, vc, orig);
2355 }
2356 FLUSH
2357 console_conditional_schedule();
2358 release_console_sem();
b293d758 2359 notify_update(vc);
1da177e4
LT		 2360 return n;
2361#undef FLUSH
2362}
2363
2364/*
2365 * This is the console switching callback.
2366 *
2367 * Doing console switching in a process context allows
2368 * us to do the switches asynchronously (needed when we want
2369 * to switch due to a keyboard interrupt). Synchronization
2370 * with other console code and prevention of re-entrancy is
2371 * ensured with console_sem.
2372 */
65f27f38 2373static void console_callback(struct work_struct *ignored)
1da177e4
LT		 2374{
2375 acquire_console_sem();
2376
2377 if (want_console >= 0) {
2378 if (want_console != fg_console &&
2379 vc_cons_allocated(want_console)) {
2380 hide_cursor(vc_cons[fg_console].d);
2381 change_console(vc_cons[want_console].d);
2382 /* we only changed when the console had already
2383 been allocated - a new console is not created
2384 in an interrupt routine */
2385 }
2386 want_console = -1;
2387 }
2388 if (do_poke_blanked_console) { /* do not unblank for a LED change */
2389 do_poke_blanked_console = 0;
2390 poke_blanked_console();
2391 }
2392 if (scrollback_delta) {
2393 struct vc_data *vc = vc_cons[fg_console].d;
2394 clear_selection();
2395 if (vc->vc_mode == KD_TEXT)
2396 vc->vc_sw->con_scrolldelta(vc, scrollback_delta);
2397 scrollback_delta = 0;
2398 }
2399 if (blank_timer_expired) {
2400 do_blank_screen(0);
2401 blank_timer_expired = 0;
2402 }
b293d758 2403 notify_update(vc_cons[fg_console].d);
1da177e4
LT		 2404
2405 release_console_sem();
2406}
2407
b257bc05 2408int set_console(int nr)
1da177e4 2409{
b257bc05
AJ		 2410 struct vc_data *vc = vc_cons[fg_console].d;
2411
2412 if (!vc_cons_allocated(nr) || vt_dont_switch ||
2413 (vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) {
2414
2415 /*
2416 * Console switch will fail in console_callback() or
2417 * change_console() so there is no point scheduling
2418 * the callback
2419 *
2420 * Existing set_console() users don't check the return
2421 * value so this shouldn't break anything
2422 */
2423 return -EINVAL;
2424 }
2425
1da177e4
LT		 2426 want_console = nr;
2427 schedule_console_callback();
b257bc05
AJ		 2428
2429 return 0;
1da177e4
LT		 2430}
2431
2432struct tty_driver *console_driver;
2433
2434#ifdef CONFIG_VT_CONSOLE
2435
2436/*
2437 * Console on virtual terminal
2438 *
2439 * The console must be locked when we get here.
2440 */
2441
2442static void vt_console_print(struct console *co, const char *b, unsigned count)
2443{
2444 struct vc_data *vc = vc_cons[fg_console].d;
2445 unsigned char c;
b0940003 2446 static DEFINE_SPINLOCK(printing_lock);
1da177e4
LT		 2447 const ushort *start;
2448 ushort cnt = 0;
2449 ushort myx;
2450
2451 /* console busy or not yet initialized */
b0940003
NP		 2452 if (!printable)
2453 return;
2454 if (!spin_trylock(&printing_lock))
1da177e4
LT		 2455 return;
2456
2457 if (kmsg_redirect && vc_cons_allocated(kmsg_redirect - 1))
2458 vc = vc_cons[kmsg_redirect - 1].d;
2459
2460 /* read `x' only after setting currcons properly (otherwise
2461 the `x' macro will read the x of the foreground console). */
2462 myx = vc->vc_x;
2463
2464 if (!vc_cons_allocated(fg_console)) {
2465 /* impossible */
2466 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2467 goto quit;
2468 }
2469
2470 if (vc->vc_mode != KD_TEXT)
2471 goto quit;
2472
2473 /* undraw cursor first */
2474 if (IS_FG(vc))
2475 hide_cursor(vc);
2476
2477 start = (ushort *)vc->vc_pos;
2478
2479 /* Contrived structure to try to emulate original need_wrap behaviour
2480 * Problems caused when we have need_wrap set on '\n' character */
2481 while (count--) {
2482 c = *b++;
2483 if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) {
2484 if (cnt > 0) {
2485 if (CON_IS_VISIBLE(vc))
2486 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2487 vc->vc_x += cnt;
2488 if (vc->vc_need_wrap)
2489 vc->vc_x--;
2490 cnt = 0;
2491 }
2492 if (c == 8) { /* backspace */
2493 bs(vc);
2494 start = (ushort *)vc->vc_pos;
2495 myx = vc->vc_x;
2496 continue;
2497 }
2498 if (c != 13)
2499 lf(vc);
2500 cr(vc);
2501 start = (ushort *)vc->vc_pos;
2502 myx = vc->vc_x;
2503 if (c == 10 || c == 13)
2504 continue;
2505 }
2506 scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos);
b293d758 2507 notify_write(vc, c);
1da177e4
LT		 2508 cnt++;
2509 if (myx == vc->vc_cols - 1) {
2510 vc->vc_need_wrap = 1;
2511 continue;
2512 }
2513 vc->vc_pos += 2;
2514 myx++;
2515 }
2516 if (cnt > 0) {
2517 if (CON_IS_VISIBLE(vc))
2518 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2519 vc->vc_x += cnt;
2520 if (vc->vc_x == vc->vc_cols) {
2521 vc->vc_x--;
2522 vc->vc_need_wrap = 1;
2523 }
2524 }
2525 set_cursor(vc);
b293d758 2526 notify_update(vc);
1da177e4
LT		 2527
2528quit:
b0940003 2529 spin_unlock(&printing_lock);
1da177e4
LT		 2530}
2531
2532static struct tty_driver *vt_console_device(struct console *c, int *index)
2533{
2534 *index = c->index ? c->index-1 : fg_console;
2535 return console_driver;
2536}
2537
2538static struct console vt_console_driver = {
2539 .name = "tty",
2540 .write = vt_console_print,
2541 .device = vt_console_device,
2542 .unblank = unblank_screen,
2543 .flags = CON_PRINTBUFFER,
2544 .index = -1,
2545};
2546#endif
2547
2548/*
2549 * Handling of Linux-specific VC ioctls
2550 */
2551
2552/*
2553 * Generally a bit racy with respect to console_sem().
2554 *
2555 * There are some functions which don't need it.
2556 *
2557 * There are some functions which can sleep for arbitrary periods
2558 * (paste_selection) but we don't need the lock there anyway.
2559 *
2560 * set_selection has locking, and definitely needs it
2561 */
2562
2563int tioclinux(struct tty_struct *tty, unsigned long arg)
2564{
2565 char type, data;
2566 char __user *p = (char __user *)arg;
2567 int lines;
2568 int ret;
2569
1da177e4
LT		 2570 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN))
2571 return -EPERM;
2572 if (get_user(type, p))
2573 return -EFAULT;
2574 ret = 0;
04f378b1
AC		 2575
2576 lock_kernel();
2577
1da177e4
LT		 2578 switch (type)
2579 {
2580 case TIOCL_SETSEL:
2581 acquire_console_sem();
2582 ret = set_selection((struct tiocl_selection __user *)(p+1), tty);
2583 release_console_sem();
2584 break;
2585 case TIOCL_PASTESEL:
2586 ret = paste_selection(tty);
2587 break;
2588 case TIOCL_UNBLANKSCREEN:
2d237c63 2589 acquire_console_sem();
1da177e4 2590 unblank_screen();
2d237c63 2591 release_console_sem();
1da177e4
LT		 2592 break;
2593 case TIOCL_SELLOADLUT:
2594 ret = sel_loadlut(p);
2595 break;
2596 case TIOCL_GETSHIFTSTATE:
04f378b1 2597
1da177e4
LT		 2598 /*
2599 * Make it possible to react to Shift+Mousebutton.
2600 * Note that 'shift_state' is an undocumented
2601 * kernel-internal variable; programs not closely
2602 * related to the kernel should not use this.
2603 */
2604 data = shift_state;
2605 ret = __put_user(data, p);
2606 break;
2607 case TIOCL_GETMOUSEREPORTING:
2608 data = mouse_reporting();
2609 ret = __put_user(data, p);
2610 break;
2611 case TIOCL_SETVESABLANK:
403aac96 2612 ret = set_vesa_blanking(p);
1da177e4 2613 break;
0ca07731
RW		 2614 case TIOCL_GETKMSGREDIRECT:
2615 data = kmsg_redirect;
2616 ret = __put_user(data, p);
2617 break;
1da177e4
LT		 2618 case TIOCL_SETKMSGREDIRECT:
2619 if (!capable(CAP_SYS_ADMIN)) {
2620 ret = -EPERM;
2621 } else {
2622 if (get_user(data, p+1))
2623 ret = -EFAULT;
2624 else
2625 kmsg_redirect = data;
2626 }
2627 break;
2628 case TIOCL_GETFGCONSOLE:
2629 ret = fg_console;
2630 break;
2631 case TIOCL_SCROLLCONSOLE:
2632 if (get_user(lines, (s32 __user *)(p+4))) {
2633 ret = -EFAULT;
2634 } else {
2635 scrollfront(vc_cons[fg_console].d, lines);
2636 ret = 0;
2637 }
2638 break;
2639 case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
2d237c63 2640 acquire_console_sem();
1da177e4
LT		 2641 ignore_poke = 1;
2642 do_blank_screen(0);
2d237c63 2643 release_console_sem();
1da177e4
LT		 2644 break;
2645 case TIOCL_BLANKEDSCREEN:
2646 ret = console_blanked;
2647 break;
2648 default:
2649 ret = -EINVAL;
2650 break;
2651 }
04f378b1 2652 unlock_kernel();
1da177e4
LT		 2653 return ret;
2654}
2655
2656/*
2657 * /dev/ttyN handling
2658 */
2659
2660static int con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2661{
2662 int retval;
2663
2664 retval = do_con_write(tty, buf, count);
2665 con_flush_chars(tty);
2666
2667 return retval;
2668}
2669
5d19f546 2670static int con_put_char(struct tty_struct *tty, unsigned char ch)
1da177e4
LT		 2671{
2672 if (in_interrupt())
5d19f546
AC		 2673 return 0; /* n_r3964 calls put_char() from interrupt context */
2674 return do_con_write(tty, &ch, 1);
1da177e4
LT		 2675}
2676
2677static int con_write_room(struct tty_struct *tty)
2678{
2679 if (tty->stopped)
2680 return 0;
a88a69c9 2681 return 32768; /* No limit, really; we're not buffering */
1da177e4
LT		 2682}
2683
2684static int con_chars_in_buffer(struct tty_struct *tty)
2685{
2686 return 0; /* we're not buffering */
2687}
2688
2689/*
2690 * con_throttle and con_unthrottle are only used for
2691 * paste_selection(), which has to stuff in a large number of
2692 * characters...
2693 */
2694static void con_throttle(struct tty_struct *tty)
2695{
2696}
2697
2698static void con_unthrottle(struct tty_struct *tty)
2699{
2700 struct vc_data *vc = tty->driver_data;
2701
2702 wake_up_interruptible(&vc->paste_wait);
2703}
2704
2705/*
2706 * Turn the Scroll-Lock LED on when the tty is stopped
2707 */
2708static void con_stop(struct tty_struct *tty)
2709{
2710 int console_num;
2711 if (!tty)
2712 return;
2713 console_num = tty->index;
2714 if (!vc_cons_allocated(console_num))
2715 return;
2716 set_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2717 set_leds();
2718}
2719
2720/*
2721 * Turn the Scroll-Lock LED off when the console is started
2722 */
2723static void con_start(struct tty_struct *tty)
2724{
2725 int console_num;
2726 if (!tty)
2727 return;
2728 console_num = tty->index;
2729 if (!vc_cons_allocated(console_num))
2730 return;
2731 clr_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2732 set_leds();
2733}
2734
2735static void con_flush_chars(struct tty_struct *tty)
2736{
2737 struct vc_data *vc;
2738
2739 if (in_interrupt()) /* from flush_to_ldisc */
2740 return;
2741
2742 /* if we race with con_close(), vt may be null */
2743 acquire_console_sem();
2744 vc = tty->driver_data;
2745 if (vc)
2746 set_cursor(vc);
2747 release_console_sem();
2748}
2749
2750/*
2751 * Allocate the console screen memory.
2752 */
2753static int con_open(struct tty_struct *tty, struct file *filp)
2754{
2755 unsigned int currcons = tty->index;
2756 int ret = 0;
2757
2758 acquire_console_sem();
f786648b 2759 if (tty->driver_data == NULL) {
1da177e4
LT		 2760 ret = vc_allocate(currcons);
2761 if (ret == 0) {
2762 struct vc_data *vc = vc_cons[currcons].d;
feebed65
AC		 2763
2764 /* Still being freed */
2765 if (vc->vc_tty) {
2766 release_console_sem();
2767 return -ERESTARTSYS;
2768 }
1da177e4
LT		 2769 tty->driver_data = vc;
2770 vc->vc_tty = tty;
2771
2772 if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
2773 tty->winsize.ws_row = vc_cons[currcons].d->vc_rows;
2774 tty->winsize.ws_col = vc_cons[currcons].d->vc_cols;
2775 }
c1236d31
ST		 2776 if (vc->vc_utf)
2777 tty->termios->c_iflag |= IUTF8;
2778 else
2779 tty->termios->c_iflag &= ~IUTF8;
e0426e6a 2780 release_console_sem();
1da177e4
LT		 2781 return ret;
2782 }
2783 }
2784 release_console_sem();
2785 return ret;
2786}
2787
1da177e4
LT		 2788static void con_close(struct tty_struct *tty, struct file *filp)
2789{
feebed65
AC		 2790 /* Nothing to do - we defer to shutdown */
2791}
1da177e4 2792
feebed65
AC		 2793static void con_shutdown(struct tty_struct *tty)
2794{
2795 struct vc_data *vc = tty->driver_data;
2796 BUG_ON(vc == NULL);
2797 acquire_console_sem();
2798 vc->vc_tty = NULL;
1da177e4 2799 release_console_sem();
feebed65 2800 tty_shutdown(tty);
1da177e4
LT		 2801}
2802
fa6ce9ab
JE		 2803static int default_italic_color = 2; // green (ASCII)
2804static int default_underline_color = 3; // cyan (ASCII)
2805module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR);
2806module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR);
2807
1da177e4
LT		 2808static void vc_init(struct vc_data *vc, unsigned int rows,
2809 unsigned int cols, int do_clear)
2810{
2811 int j, k ;
2812
2813 vc->vc_cols = cols;
2814 vc->vc_rows = rows;
2815 vc->vc_size_row = cols << 1;
2816 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
2817
2818 set_origin(vc);
2819 vc->vc_pos = vc->vc_origin;
2820 reset_vc(vc);
2821 for (j=k=0; j<16; j++) {
2822 vc->vc_palette[k++] = default_red[j] ;
2823 vc->vc_palette[k++] = default_grn[j] ;
2824 vc->vc_palette[k++] = default_blu[j] ;
2825 }
2826 vc->vc_def_color = 0x07; /* white */
fa6ce9ab
JE		 2827 vc->vc_ulcolor = default_underline_color;
2828 vc->vc_itcolor = default_italic_color;
1da177e4
LT		 2829 vc->vc_halfcolor = 0x08; /* grey */
2830 init_waitqueue_head(&vc->paste_wait);
2831 reset_terminal(vc, do_clear);
2832}
2833
2834/*
2835 * This routine initializes console interrupts, and does nothing
2836 * else. If you want the screen to clear, call tty_write with
2837 * the appropriate escape-sequence.
2838 */
2839
2840static int __init con_init(void)
2841{
2842 const char *display_desc = NULL;
2843 struct vc_data *vc;
3e795de7 2844 unsigned int currcons = 0, i;
1da177e4
LT		 2845
2846 acquire_console_sem();
2847
2848 if (conswitchp)
2849 display_desc = conswitchp->con_startup();
2850 if (!display_desc) {
2851 fg_console = 0;
2852 release_console_sem();
2853 return 0;
2854 }
2855
3e795de7
AD		 2856 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2857 struct con_driver *con_driver = &registered_con_driver[i];
2858
2859 if (con_driver->con == NULL) {
2860 con_driver->con = conswitchp;
2861 con_driver->desc = display_desc;
2862 con_driver->flag = CON_DRIVER_FLAG_INIT;
2863 con_driver->first = 0;
2864 con_driver->last = MAX_NR_CONSOLES - 1;
2865 break;
2866 }
2867 }
2868
2869 for (i = 0; i < MAX_NR_CONSOLES; i++)
2870 con_driver_map[i] = conswitchp;
2871
1da177e4
LT		 2872 if (blankinterval) {
2873 blank_state = blank_normal_wait;
2874 mod_timer(&console_timer, jiffies + blankinterval);
2875 }
2876
1da177e4 2877 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) {
a5f4f52e 2878 vc_cons[currcons].d = vc = kzalloc(sizeof(struct vc_data), GFP_NOWAIT);
7f1f86a0 2879 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
1da177e4 2880 visual_init(vc, currcons, 1);
a5f4f52e 2881 vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_NOWAIT);
1da177e4
LT		 2882 vc->vc_kmalloced = 0;
2883 vc_init(vc, vc->vc_rows, vc->vc_cols,
2884 currcons || !vc->vc_sw->con_save_screen);
2885 }
2886 currcons = fg_console = 0;
2887 master_display_fg = vc = vc_cons[currcons].d;
2888 set_origin(vc);
2889 save_screen(vc);
2890 gotoxy(vc, vc->vc_x, vc->vc_y);
2891 csi_J(vc, 0);
2892 update_screen(vc);
2893 printk("Console: %s %s %dx%d",
2894 vc->vc_can_do_color ? "colour" : "mono",
2895 display_desc, vc->vc_cols, vc->vc_rows);
2896 printable = 1;
2897 printk("\n");
2898
2899 release_console_sem();
2900
2901#ifdef CONFIG_VT_CONSOLE
2902 register_console(&vt_console_driver);
2903#endif
2904 return 0;
2905}
2906console_initcall(con_init);
2907
b68e31d0 2908static const struct tty_operations con_ops = {
1da177e4
LT		 2909 .open = con_open,
2910 .close = con_close,
2911 .write = con_write,
2912 .write_room = con_write_room,
2913 .put_char = con_put_char,
2914 .flush_chars = con_flush_chars,
2915 .chars_in_buffer = con_chars_in_buffer,
2916 .ioctl = vt_ioctl,
2917 .stop = con_stop,
2918 .start = con_start,
2919 .throttle = con_throttle,
2920 .unthrottle = con_unthrottle,
8c9a9dd0 2921 .resize = vt_resize,
feebed65 2922 .shutdown = con_shutdown
1da177e4
LT		 2923};
2924
d81ed103
AC		 2925static struct cdev vc0_cdev;
2926
2927int __init vty_init(const struct file_operations *console_fops)
1da177e4 2928{
d81ed103
AC		 2929 cdev_init(&vc0_cdev, console_fops);
2930 if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) ||
2931 register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0)
2932 panic("Couldn't register /dev/tty0 driver\n");
2933 device_create(tty_class, NULL, MKDEV(TTY_MAJOR, 0), NULL, "tty0");
2934
1da177e4
LT		 2935 vcs_init();
2936
2937 console_driver = alloc_tty_driver(MAX_NR_CONSOLES);
2938 if (!console_driver)
2939 panic("Couldn't allocate console driver\n");
2940 console_driver->owner = THIS_MODULE;
1da177e4
LT		 2941 console_driver->name = "tty";
2942 console_driver->name_base = 1;
2943 console_driver->major = TTY_MAJOR;
2944 console_driver->minor_start = 1;
2945 console_driver->type = TTY_DRIVER_TYPE_CONSOLE;
2946 console_driver->init_termios = tty_std_termios;
c1236d31
ST		 2947 if (default_utf8)
2948 console_driver->init_termios.c_iflag |= IUTF8;
1da177e4
LT		 2949 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS;
2950 tty_set_operations(console_driver, &con_ops);
2951 if (tty_register_driver(console_driver))
2952 panic("Couldn't register console driver\n");
1da177e4
LT		 2953 kbd_init();
2954 console_map_init();
2955#ifdef CONFIG_PROM_CONSOLE
2956 prom_con_init();
2957#endif
2958#ifdef CONFIG_MDA_CONSOLE
2959 mda_console_init();
2960#endif
2961 return 0;
2962}
2963
2964#ifndef VT_SINGLE_DRIVER
6db4063c
AD		 2965#include <linux/device.h>
2966
2967static struct class *vtconsole_class;
2968
b7269dd2
JB		 2969static int bind_con_driver(const struct consw *csw, int first, int last,
2970 int deflt)
1da177e4 2971{
3e795de7
AD		 2972 struct module *owner = csw->owner;
2973 const char *desc = NULL;
2974 struct con_driver *con_driver;
2975 int i, j = -1, k = -1, retval = -ENODEV;
1da177e4 2976
1da177e4
LT		 2977 if (!try_module_get(owner))
2978 return -ENODEV;
2979
1c8ce271 2980 acquire_console_sem();
1c8ce271 2981
3e795de7
AD		 2982 /* check if driver is registered */
2983 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2984 con_driver = &registered_con_driver[i];
2985
2986 if (con_driver->con == csw) {
2987 desc = con_driver->desc;
2988 retval = 0;
2989 break;
2990 }
2991 }
2992
2993 if (retval)
2994 goto err;
2995
2996 if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) {
2997 csw->con_startup();
2998 con_driver->flag |= CON_DRIVER_FLAG_INIT;
1da177e4 2999 }
1c8ce271 3000
1da177e4
LT		 3001 if (deflt) {
3002 if (conswitchp)
3003 module_put(conswitchp->owner);
1c8ce271 3004
1da177e4
LT		 3005 __module_get(owner);
3006 conswitchp = csw;
3007 }
3008
3e795de7
AD		 3009 first = max(first, con_driver->first);
3010 last = min(last, con_driver->last);
3011
1da177e4
LT		 3012 for (i = first; i <= last; i++) {
3013 int old_was_color;
3014 struct vc_data *vc = vc_cons[i].d;
3015
3016 if (con_driver_map[i])
3017 module_put(con_driver_map[i]->owner);
3018 __module_get(owner);
3019 con_driver_map[i] = csw;
3020
3021 if (!vc || !vc->vc_sw)
3022 continue;
3023
3024 j = i;
1c8ce271 3025
4ee1acce
DH		 3026 if (CON_IS_VISIBLE(vc)) {
3027 k = i;
1da177e4 3028 save_screen(vc);
4ee1acce
DH		 3029 }
3030
1da177e4
LT		 3031 old_was_color = vc->vc_can_do_color;
3032 vc->vc_sw->con_deinit(vc);
3033 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
1da177e4 3034 visual_init(vc, i, 0);
1c8ce271 3035 set_origin(vc);
1da177e4
LT		 3036 update_attr(vc);
3037
3038 /* If the console changed between mono <-> color, then
3039 * the attributes in the screenbuf will be wrong. The
3040 * following resets all attributes to something sane.
3041 */
3042 if (old_was_color != vc->vc_can_do_color)
3043 clear_buffer_attributes(vc);
1da177e4 3044 }
4ee1acce 3045
1da177e4
LT		 3046 printk("Console: switching ");
3047 if (!deflt)
3048 printk("consoles %d-%d ", first+1, last+1);
4ee1acce
DH		 3049 if (j >= 0) {
3050 struct vc_data *vc = vc_cons[j].d;
3051
1da177e4 3052 printk("to %s %s %dx%d\n",
4ee1acce
DH		 3053 vc->vc_can_do_color ? "colour" : "mono",
3054 desc, vc->vc_cols, vc->vc_rows);
3055
3056 if (k >= 0) {
3057 vc = vc_cons[k].d;
3058 update_screen(vc);
3059 }
3060 } else
1da177e4
LT		 3061 printk("to %s\n", desc);
3062
3e795de7
AD		 3063 retval = 0;
3064err:
1da177e4 3065 release_console_sem();
1da177e4 3066 module_put(owner);
3e795de7
AD		 3067 return retval;
3068};
1da177e4 3069
13ae6645
AD		 3070#ifdef CONFIG_VT_HW_CONSOLE_BINDING
3071static int con_is_graphics(const struct consw *csw, int first, int last)
3072{
3073 int i, retval = 0;
3074
3075 for (i = first; i <= last; i++) {
3076 struct vc_data *vc = vc_cons[i].d;
3077
3078 if (vc && vc->vc_mode == KD_GRAPHICS) {
3079 retval = 1;
3080 break;
3081 }
3082 }
3083
3084 return retval;
3085}
3086
b7269dd2
JB		 3087/**
3088 * unbind_con_driver - unbind a console driver
3089 * @csw: pointer to console driver to unregister
3090 * @first: first in range of consoles that @csw should be unbound from
3091 * @last: last in range of consoles that @csw should be unbound from
3092 * @deflt: should next bound console driver be default after @csw is unbound?
3093 *
3094 * To unbind a driver from all possible consoles, pass 0 as @first and
3095 * %MAX_NR_CONSOLES as @last.
3096 *
3097 * @deflt controls whether the console that ends up replacing @csw should be
3098 * the default console.
3099 *
3100 * RETURNS:
3101 * -ENODEV if @csw isn't a registered console driver or can't be unregistered
3102 * or 0 on success.
3103 */
623e71b0 3104int unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
1da177e4 3105{
3e795de7
AD		 3106 struct module *owner = csw->owner;
3107 const struct consw *defcsw = NULL;
3108 struct con_driver *con_driver = NULL, *con_back = NULL;
3109 int i, retval = -ENODEV;
1da177e4 3110
3e795de7
AD		 3111 if (!try_module_get(owner))
3112 return -ENODEV;
3113
3114 acquire_console_sem();
3115
3116 /* check if driver is registered and if it is unbindable */
3117 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3118 con_driver = &registered_con_driver[i];
3119
3120 if (con_driver->con == csw &&
6db4063c 3121 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3e795de7
AD		 3122 retval = 0;
3123 break;
3124 }
3125 }
3126
3127 if (retval) {
3128 release_console_sem();
3129 goto err;
3130 }
3131
6db4063c
AD		 3132 retval = -ENODEV;
3133
3e795de7
AD		 3134 /* check if backup driver exists */
3135 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3136 con_back = &registered_con_driver[i];
3137
3138 if (con_back->con &&
6db4063c 3139 !(con_back->flag & CON_DRIVER_FLAG_MODULE)) {
3e795de7
AD		 3140 defcsw = con_back->con;
3141 retval = 0;
3142 break;
3143 }
3144 }
3145
3146 if (retval) {
3147 release_console_sem();
3148 goto err;
3149 }
3150
3151 if (!con_is_bound(csw)) {
3152 release_console_sem();
3153 goto err;
3154 }
3155
3156 first = max(first, con_driver->first);
3157 last = min(last, con_driver->last);
3158
3159 for (i = first; i <= last; i++) {
1da177e4
LT		 3160 if (con_driver_map[i] == csw) {
3161 module_put(csw->owner);
3162 con_driver_map[i] = NULL;
3163 }
3e795de7
AD		 3164 }
3165
3166 if (!con_is_bound(defcsw)) {
6db4063c
AD		 3167 const struct consw *defconsw = conswitchp;
3168
3e795de7
AD		 3169 defcsw->con_startup();
3170 con_back->flag |= CON_DRIVER_FLAG_INIT;
6db4063c
AD		 3171 /*
3172 * vgacon may change the default driver to point
3173 * to dummycon, we restore it here...
3174 */
3175 conswitchp = defconsw;
3e795de7
AD		 3176 }
3177
3178 if (!con_is_bound(csw))
3179 con_driver->flag &= ~CON_DRIVER_FLAG_INIT;
3180
3181 release_console_sem();
6db4063c
AD		 3182 /* ignore return value, binding should not fail */
3183 bind_con_driver(defcsw, first, last, deflt);
3e795de7
AD		 3184err:
3185 module_put(owner);
3186 return retval;
3187
3188}
623e71b0 3189EXPORT_SYMBOL(unbind_con_driver);
3e795de7 3190
6db4063c
AD		 3191static int vt_bind(struct con_driver *con)
3192{
3193 const struct consw *defcsw = NULL, *csw = NULL;
3194 int i, more = 1, first = -1, last = -1, deflt = 0;
3195
3196 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3197 con_is_graphics(con->con, con->first, con->last))
3198 goto err;
3199
3200 csw = con->con;
3201
3202 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3203 struct con_driver *con = &registered_con_driver[i];
3204
3205 if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) {
3206 defcsw = con->con;
3207 break;
3208 }
3209 }
3210
3211 if (!defcsw)
3212 goto err;
3213
3214 while (more) {
3215 more = 0;
3216
3217 for (i = con->first; i <= con->last; i++) {
3218 if (con_driver_map[i] == defcsw) {
3219 if (first == -1)
3220 first = i;
3221 last = i;
3222 more = 1;
3223 } else if (first != -1)
3224 break;
3225 }
3226
3227 if (first == 0 && last == MAX_NR_CONSOLES -1)
3228 deflt = 1;
3229
3230 if (first != -1)
3231 bind_con_driver(csw, first, last, deflt);
3232
3233 first = -1;
3234 last = -1;
3235 deflt = 0;
3236 }
3237
3238err:
3239 return 0;
3240}
3241
3242static int vt_unbind(struct con_driver *con)
3243{
3244 const struct consw *csw = NULL;
3245 int i, more = 1, first = -1, last = -1, deflt = 0;
3246
3247 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3248 con_is_graphics(con->con, con->first, con->last))
3249 goto err;
3250
3251 csw = con->con;
3252
3253 while (more) {
3254 more = 0;
3255
3256 for (i = con->first; i <= con->last; i++) {
3257 if (con_driver_map[i] == csw) {
3258 if (first == -1)
3259 first = i;
3260 last = i;
3261 more = 1;
3262 } else if (first != -1)
3263 break;
3264 }
3265
3266 if (first == 0 && last == MAX_NR_CONSOLES -1)
3267 deflt = 1;
3268
3269 if (first != -1)
3270 unbind_con_driver(csw, first, last, deflt);
3271
3272 first = -1;
3273 last = -1;
3274 deflt = 0;
3275 }
3276
3277err:
3278 return 0;
3279}
13ae6645
AD		 3280#else
3281static inline int vt_bind(struct con_driver *con)
3282{
3283 return 0;
3284}
3285static inline int vt_unbind(struct con_driver *con)
3286{
3287 return 0;
3288}
3289#endif /* CONFIG_VT_HW_CONSOLE_BINDING */
6db4063c 3290
805952a8 3291static ssize_t store_bind(struct device *dev, struct device_attribute *attr,
6db4063c
AD		 3292 const char *buf, size_t count)
3293{
805952a8 3294 struct con_driver *con = dev_get_drvdata(dev);
6db4063c
AD		 3295 int bind = simple_strtoul(buf, NULL, 0);
3296
3297 if (bind)
3298 vt_bind(con);
3299 else
3300 vt_unbind(con);
3301
3302 return count;
3303}
3304
805952a8
GKH		 3305static ssize_t show_bind(struct device *dev, struct device_attribute *attr,
3306 char *buf)
6db4063c 3307{
805952a8 3308 struct con_driver *con = dev_get_drvdata(dev);
6db4063c
AD		 3309 int bind = con_is_bound(con->con);
3310
3311 return snprintf(buf, PAGE_SIZE, "%i\n", bind);
3312}
3313
805952a8
GKH		 3314static ssize_t show_name(struct device *dev, struct device_attribute *attr,
3315 char *buf)
6db4063c 3316{
805952a8 3317 struct con_driver *con = dev_get_drvdata(dev);
6db4063c
AD		 3318
3319 return snprintf(buf, PAGE_SIZE, "%s %s\n",
3320 (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)",
3321 con->desc);
3322
3323}
3324
805952a8 3325static struct device_attribute device_attrs[] = {
6db4063c
AD		 3326 __ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind),
3327 __ATTR(name, S_IRUGO, show_name, NULL),
3328};
3329
805952a8 3330static int vtconsole_init_device(struct con_driver *con)
6db4063c
AD		 3331{
3332 int i;
928e964f 3333 int error = 0;
6db4063c 3334
928e964f 3335 con->flag |= CON_DRIVER_FLAG_ATTR;
805952a8
GKH		 3336 dev_set_drvdata(con->dev, con);
3337 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3338 error = device_create_file(con->dev, &device_attrs[i]);
928e964f
AD		 3339 if (error)
3340 break;
3341 }
6db4063c 3342
928e964f
AD		 3343 if (error) {
3344 while (--i >= 0)
805952a8 3345 device_remove_file(con->dev, &device_attrs[i]);
928e964f
AD		 3346 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3347 }
3348
3349 return error;
6db4063c
AD		 3350}
3351
805952a8 3352static void vtconsole_deinit_device(struct con_driver *con)
6db4063c
AD		 3353{
3354 int i;
3355
928e964f 3356 if (con->flag & CON_DRIVER_FLAG_ATTR) {
805952a8
GKH		 3357 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3358 device_remove_file(con->dev, &device_attrs[i]);
928e964f
AD		 3359 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3360 }
6db4063c
AD		 3361}
3362
3e795de7
AD		 3363/**
3364 * con_is_bound - checks if driver is bound to the console
3365 * @csw: console driver
3366 *
3367 * RETURNS: zero if unbound, nonzero if bound
3368 *
3369 * Drivers can call this and if zero, they should release
3370 * all resources allocated on con_startup()
3371 */
3372int con_is_bound(const struct consw *csw)
3373{
3374 int i, bound = 0;
3375
3376 for (i = 0; i < MAX_NR_CONSOLES; i++) {
3377 if (con_driver_map[i] == csw) {
3378 bound = 1;
3379 break;
3380 }
3381 }
3382
3383 return bound;
3384}
3385EXPORT_SYMBOL(con_is_bound);
3386
3387/**
3388 * register_con_driver - register console driver to console layer
3389 * @csw: console driver
3390 * @first: the first console to take over, minimum value is 0
3391 * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1
3392 *
3393 * DESCRIPTION: This function registers a console driver which can later
3394 * bind to a range of consoles specified by @first and @last. It will
3395 * also initialize the console driver by calling con_startup().
3396 */
3397int register_con_driver(const struct consw *csw, int first, int last)
3398{
3399 struct module *owner = csw->owner;
3400 struct con_driver *con_driver;
3401 const char *desc;
3402 int i, retval = 0;
3403
3404 if (!try_module_get(owner))
3405 return -ENODEV;
3406
3407 acquire_console_sem();
3408
3409 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3410 con_driver = &registered_con_driver[i];
3411
3412 /* already registered */
3413 if (con_driver->con == csw)
3414 retval = -EINVAL;
3415 }
3416
3417 if (retval)
3418 goto err;
3419
3420 desc = csw->con_startup();
3421
3422 if (!desc)
3423 goto err;
3424
3425 retval = -EINVAL;
3426
3427 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3428 con_driver = &registered_con_driver[i];
3429
3430 if (con_driver->con == NULL) {
3431 con_driver->con = csw;
3432 con_driver->desc = desc;
6db4063c
AD		 3433 con_driver->node = i;
3434 con_driver->flag = CON_DRIVER_FLAG_MODULE |
3e795de7
AD		 3435 CON_DRIVER_FLAG_INIT;
3436 con_driver->first = first;
3437 con_driver->last = last;
3438 retval = 0;
3439 break;
3440 }
3441 }
3442
6db4063c
AD		 3443 if (retval)
3444 goto err;
3445
d81ed103 3446 con_driver->dev = device_create(vtconsole_class, NULL,
47aa5793
GKH		 3447 MKDEV(0, con_driver->node),
3448 NULL, "vtcon%i",
3449 con_driver->node);
6db4063c 3450
805952a8
GKH		 3451 if (IS_ERR(con_driver->dev)) {
3452 printk(KERN_WARNING "Unable to create device for %s; "
6db4063c 3453 "errno = %ld\n", con_driver->desc,
805952a8
GKH		 3454 PTR_ERR(con_driver->dev));
3455 con_driver->dev = NULL;
6db4063c 3456 } else {
805952a8 3457 vtconsole_init_device(con_driver);
6db4063c 3458 }
928e964f 3459
3e795de7
AD		 3460err:
3461 release_console_sem();
3462 module_put(owner);
3463 return retval;
3464}
3465EXPORT_SYMBOL(register_con_driver);
3466
3467/**
3468 * unregister_con_driver - unregister console driver from console layer
3469 * @csw: console driver
3470 *
3471 * DESCRIPTION: All drivers that registers to the console layer must
3472 * call this function upon exit, or if the console driver is in a state
3473 * where it won't be able to handle console services, such as the
3474 * framebuffer console without loaded framebuffer drivers.
3475 *
3476 * The driver must unbind first prior to unregistration.
3477 */
3478int unregister_con_driver(const struct consw *csw)
3479{
3480 int i, retval = -ENODEV;
3481
3482 acquire_console_sem();
3483
3484 /* cannot unregister a bound driver */
3485 if (con_is_bound(csw))
3486 goto err;
3487
3488 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3489 struct con_driver *con_driver = &registered_con_driver[i];
3490
3491 if (con_driver->con == csw &&
6db4063c 3492 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
805952a8
GKH		 3493 vtconsole_deinit_device(con_driver);
3494 device_destroy(vtconsole_class,
3495 MKDEV(0, con_driver->node));
3e795de7
AD		 3496 con_driver->con = NULL;
3497 con_driver->desc = NULL;
805952a8 3498 con_driver->dev = NULL;
6db4063c 3499 con_driver->node = 0;
3e795de7
AD		 3500 con_driver->flag = 0;
3501 con_driver->first = 0;
3502 con_driver->last = 0;
3503 retval = 0;
3504 break;
3505 }
3506 }
3e795de7
AD		 3507err:
3508 release_console_sem();
3509 return retval;
3510}
3511EXPORT_SYMBOL(unregister_con_driver);
3512
3513/*
3514 * If we support more console drivers, this function is used
3515 * when a driver wants to take over some existing consoles
3516 * and become default driver for newly opened ones.
3517 *
3518 * take_over_console is basically a register followed by unbind
3519 */
3520int take_over_console(const struct consw *csw, int first, int last, int deflt)
3521{
3522 int err;
3523
3524 err = register_con_driver(csw, first, last);
3525
3526 if (!err)
6db4063c 3527 bind_con_driver(csw, first, last, deflt);
3e795de7
AD		 3528
3529 return err;
3530}
3531
3532/*
3533 * give_up_console is a wrapper to unregister_con_driver. It will only
3534 * work if driver is fully unbound.
3535 */
3536void give_up_console(const struct consw *csw)
3537{
3538 unregister_con_driver(csw);
3539}
3540
6db4063c 3541static int __init vtconsole_class_init(void)
3e795de7 3542{
6db4063c 3543 int i;
3e795de7 3544
6db4063c
AD		 3545 vtconsole_class = class_create(THIS_MODULE, "vtconsole");
3546 if (IS_ERR(vtconsole_class)) {
3547 printk(KERN_WARNING "Unable to create vt console class; "
3548 "errno = %ld\n", PTR_ERR(vtconsole_class));
3549 vtconsole_class = NULL;
3550 }
3e795de7 3551
6db4063c 3552 /* Add system drivers to sysfs */
3e795de7
AD		 3553 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3554 struct con_driver *con = &registered_con_driver[i];
3555
805952a8 3556 if (con->con && !con->dev) {
d81ed103 3557 con->dev = device_create(vtconsole_class, NULL,
47aa5793
GKH		 3558 MKDEV(0, con->node),
3559 NULL, "vtcon%i",
3560 con->node);
6db4063c 3561
805952a8 3562 if (IS_ERR(con->dev)) {
6db4063c 3563 printk(KERN_WARNING "Unable to create "
805952a8
GKH		 3564 "device for %s; errno = %ld\n",
3565 con->desc, PTR_ERR(con->dev));
3566 con->dev = NULL;
6db4063c 3567 } else {
805952a8 3568 vtconsole_init_device(con);
6db4063c 3569 }
3e795de7 3570 }
3e795de7
AD		 3571 }
3572
3e795de7
AD		 3573 return 0;
3574}
6db4063c 3575postcore_initcall(vtconsole_class_init);
3e795de7 3576
1da177e4
LT		 3577#endif
3578
3579/*
3580 * Screen blanking
3581 */
3582
403aac96 3583static int set_vesa_blanking(char __user *p)
1da177e4 3584{
403aac96
YY		 3585 unsigned int mode;
3586
3587 if (get_user(mode, p + 1))
3588 return -EFAULT;
3589
3590 vesa_blank_mode = (mode < 4) ? mode : 0;
3591 return 0;
1da177e4
LT		 3592}
3593
1da177e4
LT		 3594void do_blank_screen(int entering_gfx)
3595{
3596 struct vc_data *vc = vc_cons[fg_console].d;
3597 int i;
3598
3599 WARN_CONSOLE_UNLOCKED();
3600
3601 if (console_blanked) {
3602 if (blank_state == blank_vesa_wait) {
3603 blank_state = blank_off;
d060a321 3604 vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0);
1da177e4
LT		 3605 }
3606 return;
3607 }
1da177e4
LT		 3608
3609 /* entering graphics mode? */
3610 if (entering_gfx) {
3611 hide_cursor(vc);
3612 save_screen(vc);
3613 vc->vc_sw->con_blank(vc, -1, 1);
3614 console_blanked = fg_console + 1;
b6e8f00f 3615 blank_state = blank_off;
1da177e4
LT		 3616 set_origin(vc);
3617 return;
3618 }
3619
b6e8f00f 3620 if (blank_state != blank_normal_wait)
3621 return;
3622 blank_state = blank_off;
3623
1da177e4
LT		 3624 /* don't blank graphics */
3625 if (vc->vc_mode != KD_TEXT) {
3626 console_blanked = fg_console + 1;
3627 return;
3628 }
3629
3630 hide_cursor(vc);
3631 del_timer_sync(&console_timer);
3632 blank_timer_expired = 0;
3633
3634 save_screen(vc);
3635 /* In case we need to reset origin, blanking hook returns 1 */
d060a321 3636 i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0);
1da177e4
LT		 3637 console_blanked = fg_console + 1;
3638 if (i)
3639 set_origin(vc);
3640
3641 if (console_blank_hook && console_blank_hook(1))
3642 return;
3643
d060a321 3644 if (vesa_off_interval && vesa_blank_mode) {
030babac 3645 blank_state = blank_vesa_wait;
1da177e4
LT		 3646 mod_timer(&console_timer, jiffies + vesa_off_interval);
3647 }
1da177e4
LT		 3648}
3649EXPORT_SYMBOL(do_blank_screen);
3650
3651/*
3652 * Called by timer as well as from vt_console_driver
3653 */
3654void do_unblank_screen(int leaving_gfx)
3655{
3656 struct vc_data *vc;
3657
3658 /* This should now always be called from a "sane" (read: can schedule)
3659 * context for the sake of the low level drivers, except in the special
3660 * case of oops_in_progress
3661 */
3662 if (!oops_in_progress)
3663 might_sleep();
3664
3665 WARN_CONSOLE_UNLOCKED();
3666
3667 ignore_poke = 0;
3668 if (!console_blanked)
3669 return;
3670 if (!vc_cons_allocated(fg_console)) {
3671 /* impossible */
3672 printk("unblank_screen: tty %d not allocated ??\n", fg_console+1);
3673 return;
3674 }
3675 vc = vc_cons[fg_console].d;
3676 if (vc->vc_mode != KD_TEXT)
3677 return; /* but leave console_blanked != 0 */
3678
3679 if (blankinterval) {
3680 mod_timer(&console_timer, jiffies + blankinterval);
3681 blank_state = blank_normal_wait;
3682 }
3683
3684 console_blanked = 0;
3685 if (vc->vc_sw->con_blank(vc, 0, leaving_gfx))
3686 /* Low-level driver cannot restore -> do it ourselves */
3687 update_screen(vc);
3688 if (console_blank_hook)
3689 console_blank_hook(0);
3690 set_palette(vc);
3691 set_cursor(vc);
3692}
3693EXPORT_SYMBOL(do_unblank_screen);
3694
3695/*
3696 * This is called by the outside world to cause a forced unblank, mostly for
3697 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
3698 * call it with 1 as an argument and so force a mode restore... that may kill
3699 * X or at least garbage the screen but would also make the Oops visible...
3700 */
3701void unblank_screen(void)
3702{
3703 do_unblank_screen(0);
3704}
3705
3706/*
70522e12 3707 * We defer the timer blanking to work queue so it can take the console mutex
1da177e4 3708 * (console operations can still happen at irq time, but only from printk which
70522e12 3709 * has the console mutex. Not perfect yet, but better than no locking
1da177e4
LT		 3710 */
3711static void blank_screen_t(unsigned long dummy)
3712{
cc63b1e1
JB		 3713 if (unlikely(!keventd_up())) {
3714 mod_timer(&console_timer, jiffies + blankinterval);
3715 return;
3716 }
1da177e4
LT		 3717 blank_timer_expired = 1;
3718 schedule_work(&console_work);
3719}
3720
3721void poke_blanked_console(void)
3722{
3723 WARN_CONSOLE_UNLOCKED();
3724
3725 /* Add this so we quickly catch whoever might call us in a non
3726 * safe context. Nowadays, unblank_screen() isn't to be called in
3727 * atomic contexts and is allowed to schedule (with the special case
3728 * of oops_in_progress, but that isn't of any concern for this
3729 * function. --BenH.
3730 */
3731 might_sleep();
3732
3733 /* This isn't perfectly race free, but a race here would be mostly harmless,
3734 * at worse, we'll do a spurrious blank and it's unlikely
3735 */
3736 del_timer(&console_timer);
3737 blank_timer_expired = 0;
3738
3739 if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS)
3740 return;
3741 if (console_blanked)
3742 unblank_screen();
3743 else if (blankinterval) {
3744 mod_timer(&console_timer, jiffies + blankinterval);
3745 blank_state = blank_normal_wait;
3746 }
3747}
3748
3749/*
3750 * Palettes
3751 */
3752
3753static void set_palette(struct vc_data *vc)
3754{
3755 WARN_CONSOLE_UNLOCKED();
3756
3757 if (vc->vc_mode != KD_GRAPHICS)
3758 vc->vc_sw->con_set_palette(vc, color_table);
3759}
3760
3761static int set_get_cmap(unsigned char __user *arg, int set)
3762{
3763 int i, j, k;
3764
3765 WARN_CONSOLE_UNLOCKED();
3766
3767 for (i = 0; i < 16; i++)
3768 if (set) {
3769 get_user(default_red[i], arg++);
3770 get_user(default_grn[i], arg++);
3771 get_user(default_blu[i], arg++);
3772 } else {
3773 put_user(default_red[i], arg++);
3774 put_user(default_grn[i], arg++);
3775 put_user(default_blu[i], arg++);
3776 }
3777 if (set) {
3778 for (i = 0; i < MAX_NR_CONSOLES; i++)
3779 if (vc_cons_allocated(i)) {
3780 for (j = k = 0; j < 16; j++) {
3781 vc_cons[i].d->vc_palette[k++] = default_red[j];
3782 vc_cons[i].d->vc_palette[k++] = default_grn[j];
3783 vc_cons[i].d->vc_palette[k++] = default_blu[j];
3784 }
3785 set_palette(vc_cons[i].d);
3786 }
3787 }
3788 return 0;
3789}
3790
3791/*
3792 * Load palette into the DAC registers. arg points to a colour
3793 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
3794 */
3795
3796int con_set_cmap(unsigned char __user *arg)
3797{
3798 int rc;
3799
3800 acquire_console_sem();
3801 rc = set_get_cmap (arg,1);
3802 release_console_sem();
3803
3804 return rc;
3805}
3806
3807int con_get_cmap(unsigned char __user *arg)
3808{
3809 int rc;
3810
3811 acquire_console_sem();
3812 rc = set_get_cmap (arg,0);
3813 release_console_sem();
3814
3815 return rc;
3816}
3817
3818void reset_palette(struct vc_data *vc)
3819{
3820 int j, k;
3821 for (j=k=0; j<16; j++) {
3822 vc->vc_palette[k++] = default_red[j];
3823 vc->vc_palette[k++] = default_grn[j];
3824 vc->vc_palette[k++] = default_blu[j];
3825 }
3826 set_palette(vc);
3827}
3828
3829/*
3830 * Font switching
3831 *
3832 * Currently we only support fonts up to 32 pixels wide, at a maximum height
3833 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
3834 * depending on width) reserved for each character which is kinda wasty, but
3835 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
3836 * is upto the actual low-level console-driver convert data into its favorite
3837 * format (maybe we should add a `fontoffset' field to the `display'
3838 * structure so we won't have to convert the fontdata all the time.
3839 * /Jes
3840 */
3841
3842#define max_font_size 65536
3843
3844static int con_font_get(struct vc_data *vc, struct console_font_op *op)
3845{
3846 struct console_font font;
3847 int rc = -EINVAL;
3848 int c;
3849
3850 if (vc->vc_mode != KD_TEXT)
3851 return -EINVAL;
3852
3853 if (op->data) {
3854 font.data = kmalloc(max_font_size, GFP_KERNEL);
3855 if (!font.data)
3856 return -ENOMEM;
3857 } else
3858 font.data = NULL;
3859
3860 acquire_console_sem();
3861 if (vc->vc_sw->con_font_get)
3862 rc = vc->vc_sw->con_font_get(vc, &font);
3863 else
3864 rc = -ENOSYS;
3865 release_console_sem();
3866
3867 if (rc)
3868 goto out;
3869
3870 c = (font.width+7)/8 * 32 * font.charcount;
04f378b1 3871
1da177e4
LT		 3872 if (op->data && font.charcount > op->charcount)
3873 rc = -ENOSPC;
3874 if (!(op->flags & KD_FONT_FLAG_OLD)) {
3875 if (font.width > op->width || font.height > op->height)
3876 rc = -ENOSPC;
3877 } else {
3878 if (font.width != 8)
3879 rc = -EIO;
3880 else if ((op->height && font.height > op->height) ||
3881 font.height > 32)
3882 rc = -ENOSPC;
3883 }
3884 if (rc)
3885 goto out;
3886
3887 op->height = font.height;
3888 op->width = font.width;
3889 op->charcount = font.charcount;
3890
3891 if (op->data && copy_to_user(op->data, font.data, c))
3892 rc = -EFAULT;
3893
3894out:
3895 kfree(font.data);
3896 return rc;
3897}
3898
3899static int con_font_set(struct vc_data *vc, struct console_font_op *op)
3900{
3901 struct console_font font;
3902 int rc = -EINVAL;
3903 int size;
3904
3905 if (vc->vc_mode != KD_TEXT)
3906 return -EINVAL;
3907 if (!op->data)
3908 return -EINVAL;
3909 if (op->charcount > 512)
3910 return -EINVAL;
3911 if (!op->height) { /* Need to guess font height [compat] */
3912 int h, i;
3913 u8 __user *charmap = op->data;
3914 u8 tmp;
3915
3916 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
3917 so that we can get rid of this soon */
3918 if (!(op->flags & KD_FONT_FLAG_OLD))
3919 return -EINVAL;
3920 for (h = 32; h > 0; h--)
3921 for (i = 0; i < op->charcount; i++) {
3922 if (get_user(tmp, &charmap[32*i+h-1]))
3923 return -EFAULT;
3924 if (tmp)
3925 goto nonzero;
3926 }
3927 return -EINVAL;
3928 nonzero:
3929 op->height = h;
3930 }
3931 if (op->width <= 0 || op->width > 32 || op->height > 32)
3932 return -EINVAL;
3933 size = (op->width+7)/8 * 32 * op->charcount;
3934 if (size > max_font_size)
3935 return -ENOSPC;
3936 font.charcount = op->charcount;
3937 font.height = op->height;
3938 font.width = op->width;
3939 font.data = kmalloc(size, GFP_KERNEL);
3940 if (!font.data)
3941 return -ENOMEM;
3942 if (copy_from_user(font.data, op->data, size)) {
3943 kfree(font.data);
3944 return -EFAULT;
3945 }
3946 acquire_console_sem();
3947 if (vc->vc_sw->con_font_set)
3948 rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
3949 else
3950 rc = -ENOSYS;
3951 release_console_sem();
3952 kfree(font.data);
3953 return rc;
3954}
3955
3956static int con_font_default(struct vc_data *vc, struct console_font_op *op)
3957{
3958 struct console_font font = {.width = op->width, .height = op->height};
3959 char name[MAX_FONT_NAME];
3960 char *s = name;
3961 int rc;
3962
3963 if (vc->vc_mode != KD_TEXT)
3964 return -EINVAL;
3965
3966 if (!op->data)
3967 s = NULL;
3968 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0)
3969 return -EFAULT;
3970 else
3971 name[MAX_FONT_NAME - 1] = 0;
3972
3973 acquire_console_sem();
3974 if (vc->vc_sw->con_font_default)
3975 rc = vc->vc_sw->con_font_default(vc, &font, s);
3976 else
3977 rc = -ENOSYS;
3978 release_console_sem();
3979 if (!rc) {
3980 op->width = font.width;
3981 op->height = font.height;
3982 }
3983 return rc;
3984}
3985
3986static int con_font_copy(struct vc_data *vc, struct console_font_op *op)
3987{
3988 int con = op->height;
3989 int rc;
3990
3991 if (vc->vc_mode != KD_TEXT)
3992 return -EINVAL;
3993
3994 acquire_console_sem();
3995 if (!vc->vc_sw->con_font_copy)
3996 rc = -ENOSYS;
3997 else if (con < 0 || !vc_cons_allocated(con))
3998 rc = -ENOTTY;
3999 else if (con == vc->vc_num) /* nothing to do */
4000 rc = 0;
4001 else
4002 rc = vc->vc_sw->con_font_copy(vc, con);
4003 release_console_sem();
4004 return rc;
4005}
4006
4007int con_font_op(struct vc_data *vc, struct console_font_op *op)
4008{
4009 switch (op->op) {
4010 case KD_FONT_OP_SET:
4011 return con_font_set(vc, op);
4012 case KD_FONT_OP_GET:
4013 return con_font_get(vc, op);
4014 case KD_FONT_OP_SET_DEFAULT:
4015 return con_font_default(vc, op);
4016 case KD_FONT_OP_COPY:
4017 return con_font_copy(vc, op);
4018 }
4019 return -ENOSYS;
4020}
4021
4022/*
4023 * Interface exported to selection and vcs.
4024 */
4025
4026/* used by selection */
4027u16 screen_glyph(struct vc_data *vc, int offset)
4028{
4029 u16 w = scr_readw(screenpos(vc, offset, 1));
4030 u16 c = w & 0xff;
4031
4032 if (w & vc->vc_hi_font_mask)
4033 c |= 0x100;
4034 return c;
4035}
f7511d5f 4036EXPORT_SYMBOL_GPL(screen_glyph);
1da177e4
LT		 4037
4038/* used by vcs - note the word offset */
4039unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed)
4040{
4041 return screenpos(vc, 2 * w_offset, viewed);
4042}
4043
4044void getconsxy(struct vc_data *vc, unsigned char *p)
4045{
4046 p[0] = vc->vc_x;
4047 p[1] = vc->vc_y;
4048}
4049
4050void putconsxy(struct vc_data *vc, unsigned char *p)
4051{
9477e260 4052 hide_cursor(vc);
1da177e4
LT		 4053 gotoxy(vc, p[0], p[1]);
4054 set_cursor(vc);
4055}
4056
4057u16 vcs_scr_readw(struct vc_data *vc, const u16 *org)
4058{
4059 if ((unsigned long)org == vc->vc_pos && softcursor_original != -1)
4060 return softcursor_original;
4061 return scr_readw(org);
4062}
4063
4064void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org)
4065{
4066 scr_writew(val, org);
4067 if ((unsigned long)org == vc->vc_pos) {
4068 softcursor_original = -1;
4069 add_softcursor(vc);
4070 }
4071}
4072
4073/*
4074 * Visible symbols for modules
4075 */
4076
4077EXPORT_SYMBOL(color_table);
4078EXPORT_SYMBOL(default_red);
4079EXPORT_SYMBOL(default_grn);
4080EXPORT_SYMBOL(default_blu);
4081EXPORT_SYMBOL(update_region);
4082EXPORT_SYMBOL(redraw_screen);
4083EXPORT_SYMBOL(vc_resize);
4084EXPORT_SYMBOL(fg_console);
4085EXPORT_SYMBOL(console_blank_hook);
4086EXPORT_SYMBOL(console_blanked);
4087EXPORT_SYMBOL(vc_cons);
4088#ifndef VT_SINGLE_DRIVER
4089EXPORT_SYMBOL(take_over_console);
4090EXPORT_SYMBOL(give_up_console);
4091#endif
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