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fix refcounting of nsproxy object when unshared
[net-next-2.6.git] / drivers / char / vt.c
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1da177e4
LT		 1/*
2 * linux/drivers/char/vt.c
3 *
4 * Copyright (C) 1991, 1992 Linus Torvalds
5 */
6
7/*
8 * Hopefully this will be a rather complete VT102 implementation.
9 *
10 * Beeping thanks to John T Kohl.
11 *
12 * Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics
13 * Chars, and VT100 enhancements by Peter MacDonald.
14 *
15 * Copy and paste function by Andrew Haylett,
16 * some enhancements by Alessandro Rubini.
17 *
18 * Code to check for different video-cards mostly by Galen Hunt,
19 * <g-hunt@ee.utah.edu>
20 *
21 * Rudimentary ISO 10646/Unicode/UTF-8 character set support by
22 * Markus Kuhn, <mskuhn@immd4.informatik.uni-erlangen.de>.
23 *
24 * Dynamic allocation of consoles, aeb@cwi.nl, May 1994
25 * Resizing of consoles, aeb, 940926
26 *
27 * Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94
28 * <poe@daimi.aau.dk>
29 *
30 * User-defined bell sound, new setterm control sequences and printk
31 * redirection by Martin Mares <mj@k332.feld.cvut.cz> 19-Nov-95
32 *
33 * APM screenblank bug fixed Takashi Manabe <manabe@roy.dsl.tutics.tut.jp>
34 *
35 * Merge with the abstract console driver by Geert Uytterhoeven
36 * <geert@linux-m68k.org>, Jan 1997.
37 *
38 * Original m68k console driver modifications by
39 *
40 * - Arno Griffioen <arno@usn.nl>
41 * - David Carter <carter@cs.bris.ac.uk>
42 *
43 * The abstract console driver provides a generic interface for a text
44 * console. It supports VGA text mode, frame buffer based graphical consoles
45 * and special graphics processors that are only accessible through some
46 * registers (e.g. a TMS340x0 GSP).
47 *
48 * The interface to the hardware is specified using a special structure
49 * (struct consw) which contains function pointers to console operations
50 * (see <linux/console.h> for more information).
51 *
52 * Support for changeable cursor shape
53 * by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997
54 *
55 * Ported to i386 and con_scrolldelta fixed
56 * by Emmanuel Marty <core@ggi-project.org>, April 1998
57 *
58 * Resurrected character buffers in videoram plus lots of other trickery
59 * by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998
60 *
61 * Removed old-style timers, introduced console_timer, made timer
62 * deletion SMP-safe. 17Jun00, Andrew Morton <andrewm@uow.edu.au>
63 *
64 * Removed console_lock, enabled interrupts across all console operations
65 * 13 March 2001, Andrew Morton
d4328b40
AT		 66 *
67 * Fixed UTF-8 mode so alternate charset modes always work according
68 * to control sequences interpreted in do_con_trol function
69 * preserving backward VT100 semigraphics compatibility,
70 * malformed UTF sequences represented as sequences of replacement glyphs,
71 * original codes or '?' as a last resort if replacement glyph is undefined
72 * by Adam Tla/lka <atlka@pg.gda.pl>, Aug 2006
1da177e4
LT		 73 */
74
75#include <linux/module.h>
76#include <linux/types.h>
77#include <linux/sched.h>
78#include <linux/tty.h>
79#include <linux/tty_flip.h>
80#include <linux/kernel.h>
81#include <linux/string.h>
82#include <linux/errno.h>
83#include <linux/kd.h>
84#include <linux/slab.h>
85#include <linux/major.h>
86#include <linux/mm.h>
87#include <linux/console.h>
88#include <linux/init.h>
c831c338 89#include <linux/mutex.h>
1da177e4
LT		 90#include <linux/vt_kern.h>
91#include <linux/selection.h>
92#include <linux/tiocl.h>
93#include <linux/kbd_kern.h>
94#include <linux/consolemap.h>
95#include <linux/timer.h>
96#include <linux/interrupt.h>
1da177e4
LT		 97#include <linux/workqueue.h>
98#include <linux/bootmem.h>
99#include <linux/pm.h>
100#include <linux/font.h>
101#include <linux/bitops.h>
102
103#include <asm/io.h>
104#include <asm/system.h>
105#include <asm/uaccess.h>
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? */
042f10ec
AD		 161static int default_utf8;
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
225/*
226 * Low-Level Functions
227 */
228
229#define IS_FG(vc) ((vc)->vc_num == fg_console)
230
231#ifdef VT_BUF_VRAM_ONLY
232#define DO_UPDATE(vc) 0
233#else
234#define DO_UPDATE(vc) CON_IS_VISIBLE(vc)
235#endif
236
237static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed)
238{
239 unsigned short *p;
240
241 if (!viewed)
242 p = (unsigned short *)(vc->vc_origin + offset);
243 else if (!vc->vc_sw->con_screen_pos)
244 p = (unsigned short *)(vc->vc_visible_origin + offset);
245 else
246 p = vc->vc_sw->con_screen_pos(vc, offset);
247 return p;
248}
249
250static inline void scrolldelta(int lines)
251{
252 scrollback_delta += lines;
253 schedule_console_callback();
254}
255
256void schedule_console_callback(void)
257{
258 schedule_work(&console_work);
259}
260
261static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
262{
263 unsigned short *d, *s;
264
265 if (t+nr >= b)
266 nr = b - t - 1;
267 if (b > vc->vc_rows || t >= b || nr < 1)
268 return;
269 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr))
270 return;
271 d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
272 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr));
273 scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row);
274 scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_video_erase_char,
275 vc->vc_size_row * nr);
276}
277
278static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
279{
280 unsigned short *s;
281 unsigned int step;
282
283 if (t+nr >= b)
284 nr = b - t - 1;
285 if (b > vc->vc_rows || t >= b || nr < 1)
286 return;
287 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr))
288 return;
289 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
290 step = vc->vc_cols * nr;
291 scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row);
292 scr_memsetw(s, vc->vc_video_erase_char, 2 * step);
293}
294
295static void do_update_region(struct vc_data *vc, unsigned long start, int count)
296{
297#ifndef VT_BUF_VRAM_ONLY
298 unsigned int xx, yy, offset;
299 u16 *p;
300
301 p = (u16 *) start;
302 if (!vc->vc_sw->con_getxy) {
303 offset = (start - vc->vc_origin) / 2;
304 xx = offset % vc->vc_cols;
305 yy = offset / vc->vc_cols;
306 } else {
307 int nxx, nyy;
308 start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy);
309 xx = nxx; yy = nyy;
310 }
311 for(;;) {
312 u16 attrib = scr_readw(p) & 0xff00;
313 int startx = xx;
314 u16 *q = p;
315 while (xx < vc->vc_cols && count) {
316 if (attrib != (scr_readw(p) & 0xff00)) {
317 if (p > q)
318 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
319 startx = xx;
320 q = p;
321 attrib = scr_readw(p) & 0xff00;
322 }
323 p++;
324 xx++;
325 count--;
326 }
327 if (p > q)
328 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
329 if (!count)
330 break;
331 xx = 0;
332 yy++;
333 if (vc->vc_sw->con_getxy) {
334 p = (u16 *)start;
335 start = vc->vc_sw->con_getxy(vc, start, NULL, NULL);
336 }
337 }
338#endif
339}
340
341void update_region(struct vc_data *vc, unsigned long start, int count)
342{
343 WARN_CONSOLE_UNLOCKED();
344
345 if (DO_UPDATE(vc)) {
346 hide_cursor(vc);
347 do_update_region(vc, start, count);
348 set_cursor(vc);
349 }
350}
351
352/* Structure of attributes is hardware-dependent */
353
fa6ce9ab
JE		 354static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink,
355 u8 _underline, u8 _reverse, u8 _italic)
1da177e4
LT		 356{
357 if (vc->vc_sw->con_build_attr)
fa6ce9ab
JE		 358 return vc->vc_sw->con_build_attr(vc, _color, _intensity,
359 _blink, _underline, _reverse, _italic);
1da177e4
LT		 360
361#ifndef VT_BUF_VRAM_ONLY
362/*
363 * ++roman: I completely changed the attribute format for monochrome
364 * mode (!can_do_color). The formerly used MDA (monochrome display
365 * adapter) format didn't allow the combination of certain effects.
366 * Now the attribute is just a bit vector:
367 * Bit 0..1: intensity (0..2)
368 * Bit 2 : underline
369 * Bit 3 : reverse
370 * Bit 7 : blink
371 */
372 {
373 u8 a = vc->vc_color;
374 if (!vc->vc_can_do_color)
375 return _intensity |
fa6ce9ab 376 (_italic ? 2 : 0) |
1da177e4
LT		 377 (_underline ? 4 : 0) |
378 (_reverse ? 8 : 0) |
379 (_blink ? 0x80 : 0);
fa6ce9ab
JE		 380 if (_italic)
381 a = (a & 0xF0) | vc->vc_itcolor;
382 else if (_underline)
1da177e4
LT		 383 a = (a & 0xf0) | vc->vc_ulcolor;
384 else if (_intensity == 0)
385 a = (a & 0xf0) | vc->vc_ulcolor;
386 if (_reverse)
387 a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77);
388 if (_blink)
389 a ^= 0x80;
390 if (_intensity == 2)
391 a ^= 0x08;
392 if (vc->vc_hi_font_mask == 0x100)
393 a <<= 1;
394 return a;
395 }
396#else
397 return 0;
398#endif
399}
400
401static void update_attr(struct vc_data *vc)
402{
fa6ce9ab
JE		 403 vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity,
404 vc->vc_blink, vc->vc_underline,
405 vc->vc_reverse ^ vc->vc_decscnm, vc->vc_italic);
406 vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm, 0) << 8) | ' ';
1da177e4
LT		 407}
408
409/* Note: inverting the screen twice should revert to the original state */
410void invert_screen(struct vc_data *vc, int offset, int count, int viewed)
411{
412 unsigned short *p;
413
414 WARN_CONSOLE_UNLOCKED();
415
416 count /= 2;
417 p = screenpos(vc, offset, viewed);
418 if (vc->vc_sw->con_invert_region)
419 vc->vc_sw->con_invert_region(vc, p, count);
420#ifndef VT_BUF_VRAM_ONLY
421 else {
422 u16 *q = p;
423 int cnt = count;
424 u16 a;
425
426 if (!vc->vc_can_do_color) {
427 while (cnt--) {
428 a = scr_readw(q);
429 a ^= 0x0800;
430 scr_writew(a, q);
431 q++;
432 }
433 } else if (vc->vc_hi_font_mask == 0x100) {
434 while (cnt--) {
435 a = scr_readw(q);
436 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4);
437 scr_writew(a, q);
438 q++;
439 }
440 } else {
441 while (cnt--) {
442 a = scr_readw(q);
443 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4);
444 scr_writew(a, q);
445 q++;
446 }
447 }
448 }
449#endif
450 if (DO_UPDATE(vc))
451 do_update_region(vc, (unsigned long) p, count);
452}
453
454/* used by selection: complement pointer position */
455void complement_pos(struct vc_data *vc, int offset)
456{
414edcd3 457 static int old_offset = -1;
1da177e4
LT		 458 static unsigned short old;
459 static unsigned short oldx, oldy;
460
461 WARN_CONSOLE_UNLOCKED();
462
414edcd3
AD		 463 if (old_offset != -1 && old_offset >= 0 &&
464 old_offset < vc->vc_screenbuf_size) {
465 scr_writew(old, screenpos(vc, old_offset, 1));
1da177e4
LT		 466 if (DO_UPDATE(vc))
467 vc->vc_sw->con_putc(vc, old, oldy, oldx);
468 }
414edcd3
AD		 469
470 old_offset = offset;
471
472 if (offset != -1 && offset >= 0 &&
473 offset < vc->vc_screenbuf_size) {
1da177e4 474 unsigned short new;
414edcd3 475 unsigned short *p;
1da177e4
LT		 476 p = screenpos(vc, offset, 1);
477 old = scr_readw(p);
478 new = old ^ vc->vc_complement_mask;
479 scr_writew(new, p);
480 if (DO_UPDATE(vc)) {
481 oldx = (offset >> 1) % vc->vc_cols;
482 oldy = (offset >> 1) / vc->vc_cols;
483 vc->vc_sw->con_putc(vc, new, oldy, oldx);
484 }
485 }
414edcd3 486
1da177e4
LT		 487}
488
489static void insert_char(struct vc_data *vc, unsigned int nr)
490{
491 unsigned short *p, *q = (unsigned short *)vc->vc_pos;
492
493 p = q + vc->vc_cols - nr - vc->vc_x;
494 while (--p >= q)
495 scr_writew(scr_readw(p), p + nr);
496 scr_memsetw(q, vc->vc_video_erase_char, nr * 2);
497 vc->vc_need_wrap = 0;
498 if (DO_UPDATE(vc)) {
499 unsigned short oldattr = vc->vc_attr;
500 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x, vc->vc_y, vc->vc_x + nr, 1,
501 vc->vc_cols - vc->vc_x - nr);
502 vc->vc_attr = vc->vc_video_erase_char >> 8;
503 while (nr--)
504 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y, vc->vc_x + nr);
505 vc->vc_attr = oldattr;
506 }
507}
508
509static void delete_char(struct vc_data *vc, unsigned int nr)
510{
511 unsigned int i = vc->vc_x;
512 unsigned short *p = (unsigned short *)vc->vc_pos;
513
514 while (++i <= vc->vc_cols - nr) {
515 scr_writew(scr_readw(p+nr), p);
516 p++;
517 }
518 scr_memsetw(p, vc->vc_video_erase_char, nr * 2);
519 vc->vc_need_wrap = 0;
520 if (DO_UPDATE(vc)) {
521 unsigned short oldattr = vc->vc_attr;
522 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x + nr, vc->vc_y, vc->vc_x, 1,
523 vc->vc_cols - vc->vc_x - nr);
524 vc->vc_attr = vc->vc_video_erase_char >> 8;
525 while (nr--)
526 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y,
527 vc->vc_cols - 1 - nr);
528 vc->vc_attr = oldattr;
529 }
530}
531
532static int softcursor_original;
533
534static void add_softcursor(struct vc_data *vc)
535{
536 int i = scr_readw((u16 *) vc->vc_pos);
537 u32 type = vc->vc_cursor_type;
538
539 if (! (type & 0x10)) return;
540 if (softcursor_original != -1) return;
541 softcursor_original = i;
542 i |= ((type >> 8) & 0xff00 );
543 i ^= ((type) & 0xff00 );
544 if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000;
545 if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700;
546 scr_writew(i, (u16 *) vc->vc_pos);
547 if (DO_UPDATE(vc))
548 vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x);
549}
550
551static void hide_softcursor(struct vc_data *vc)
552{
553 if (softcursor_original != -1) {
554 scr_writew(softcursor_original, (u16 *)vc->vc_pos);
555 if (DO_UPDATE(vc))
556 vc->vc_sw->con_putc(vc, softcursor_original,
557 vc->vc_y, vc->vc_x);
558 softcursor_original = -1;
559 }
560}
561
562static void hide_cursor(struct vc_data *vc)
563{
564 if (vc == sel_cons)
565 clear_selection();
566 vc->vc_sw->con_cursor(vc, CM_ERASE);
567 hide_softcursor(vc);
568}
569
570static void set_cursor(struct vc_data *vc)
571{
572 if (!IS_FG(vc) || console_blanked ||
573 vc->vc_mode == KD_GRAPHICS)
574 return;
575 if (vc->vc_deccm) {
576 if (vc == sel_cons)
577 clear_selection();
578 add_softcursor(vc);
579 if ((vc->vc_cursor_type & 0x0f) != 1)
580 vc->vc_sw->con_cursor(vc, CM_DRAW);
581 } else
582 hide_cursor(vc);
583}
584
585static void set_origin(struct vc_data *vc)
586{
587 WARN_CONSOLE_UNLOCKED();
588
589 if (!CON_IS_VISIBLE(vc) ||
590 !vc->vc_sw->con_set_origin ||
591 !vc->vc_sw->con_set_origin(vc))
592 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
593 vc->vc_visible_origin = vc->vc_origin;
594 vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size;
595 vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x;
596}
597
598static inline void save_screen(struct vc_data *vc)
599{
600 WARN_CONSOLE_UNLOCKED();
601
602 if (vc->vc_sw->con_save_screen)
603 vc->vc_sw->con_save_screen(vc);
604}
605
606/*
607 * Redrawing of screen
608 */
609
610static void clear_buffer_attributes(struct vc_data *vc)
611{
612 unsigned short *p = (unsigned short *)vc->vc_origin;
613 int count = vc->vc_screenbuf_size / 2;
614 int mask = vc->vc_hi_font_mask | 0xff;
615
616 for (; count > 0; count--, p++) {
617 scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p);
618 }
619}
620
621void redraw_screen(struct vc_data *vc, int is_switch)
622{
623 int redraw = 0;
624
625 WARN_CONSOLE_UNLOCKED();
626
627 if (!vc) {
628 /* strange ... */
629 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
630 return;
631 }
632
633 if (is_switch) {
634 struct vc_data *old_vc = vc_cons[fg_console].d;
635 if (old_vc == vc)
636 return;
637 if (!CON_IS_VISIBLE(vc))
638 redraw = 1;
639 *vc->vc_display_fg = vc;
640 fg_console = vc->vc_num;
641 hide_cursor(old_vc);
642 if (!CON_IS_VISIBLE(old_vc)) {
643 save_screen(old_vc);
644 set_origin(old_vc);
645 }
646 } else {
647 hide_cursor(vc);
648 redraw = 1;
649 }
650
651 if (redraw) {
652 int update;
653 int old_was_color = vc->vc_can_do_color;
654
655 set_origin(vc);
656 update = vc->vc_sw->con_switch(vc);
657 set_palette(vc);
658 /*
659 * If console changed from mono<->color, the best we can do
660 * is to clear the buffer attributes. As it currently stands,
661 * rebuilding new attributes from the old buffer is not doable
662 * without overly complex code.
663 */
664 if (old_was_color != vc->vc_can_do_color) {
665 update_attr(vc);
666 clear_buffer_attributes(vc);
667 }
668 if (update && vc->vc_mode != KD_GRAPHICS)
669 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
670 }
671 set_cursor(vc);
672 if (is_switch) {
673 set_leds();
674 compute_shiftstate();
675 }
676}
677
678/*
679 * Allocation, freeing and resizing of VTs.
680 */
681
682int vc_cons_allocated(unsigned int i)
683{
684 return (i < MAX_NR_CONSOLES && vc_cons[i].d);
685}
686
687static void visual_init(struct vc_data *vc, int num, int init)
688{
689 /* ++Geert: vc->vc_sw->con_init determines console size */
690 if (vc->vc_sw)
691 module_put(vc->vc_sw->owner);
692 vc->vc_sw = conswitchp;
693#ifndef VT_SINGLE_DRIVER
694 if (con_driver_map[num])
695 vc->vc_sw = con_driver_map[num];
696#endif
697 __module_get(vc->vc_sw->owner);
698 vc->vc_num = num;
699 vc->vc_display_fg = &master_display_fg;
700 vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir;
701 vc->vc_uni_pagedir = 0;
702 vc->vc_hi_font_mask = 0;
703 vc->vc_complement_mask = 0;
704 vc->vc_can_do_color = 0;
705 vc->vc_sw->con_init(vc, init);
706 if (!vc->vc_complement_mask)
707 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
708 vc->vc_s_complement_mask = vc->vc_complement_mask;
709 vc->vc_size_row = vc->vc_cols << 1;
710 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
711}
712
713int vc_allocate(unsigned int currcons) /* return 0 on success */
714{
715 WARN_CONSOLE_UNLOCKED();
716
717 if (currcons >= MAX_NR_CONSOLES)
718 return -ENXIO;
719 if (!vc_cons[currcons].d) {
720 struct vc_data *vc;
721
722 /* prevent users from taking too much memory */
723 if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE))
724 return -EPERM;
725
726 /* due to the granularity of kmalloc, we waste some memory here */
727 /* the alloc is done in two steps, to optimize the common situation
728 of a 25x80 console (structsize=216, screenbuf_size=4000) */
729 /* although the numbers above are not valid since long ago, the
730 point is still up-to-date and the comment still has its value
731 even if only as a historical artifact. --mj, July 1998 */
732 vc = kmalloc(sizeof(struct vc_data), GFP_KERNEL);
733 if (!vc)
734 return -ENOMEM;
735 memset(vc, 0, sizeof(*vc));
736 vc_cons[currcons].d = vc;
c2c88f10 737 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
1da177e4
LT		 738 visual_init(vc, currcons, 1);
739 if (!*vc->vc_uni_pagedir_loc)
740 con_set_default_unimap(vc);
254e948b
CM		 741 if (!vc->vc_kmalloced)
742 vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL);
1da177e4
LT		 743 if (!vc->vc_screenbuf) {
744 kfree(vc);
745 vc_cons[currcons].d = NULL;
746 return -ENOMEM;
747 }
748 vc->vc_kmalloced = 1;
749 vc_init(vc, vc->vc_rows, vc->vc_cols, 1);
750 }
751 return 0;
752}
753
754static inline int resize_screen(struct vc_data *vc, int width, int height)
755{
756 /* Resizes the resolution of the display adapater */
757 int err = 0;
758
759 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize)
760 err = vc->vc_sw->con_resize(vc, width, height);
761 return err;
762}
763
764/*
765 * Change # of rows and columns (0 means unchanged/the size of fg_console)
766 * [this is to be used together with some user program
767 * like resize that changes the hardware videomode]
768 */
769#define VC_RESIZE_MAXCOL (32767)
770#define VC_RESIZE_MAXROW (32767)
771int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int lines)
772{
773 unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0;
774 unsigned int old_cols, old_rows, old_row_size, old_screen_size;
775 unsigned int new_cols, new_rows, new_row_size, new_screen_size;
3b41dc1a 776 unsigned int end;
1da177e4
LT		 777 unsigned short *newscreen;
778
779 WARN_CONSOLE_UNLOCKED();
780
781 if (!vc)
782 return -ENXIO;
783
784 if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW)
785 return -EINVAL;
786
787 new_cols = (cols ? cols : vc->vc_cols);
788 new_rows = (lines ? lines : vc->vc_rows);
789 new_row_size = new_cols << 1;
790 new_screen_size = new_row_size * new_rows;
791
792 if (new_cols == vc->vc_cols && new_rows == vc->vc_rows)
793 return 0;
794
5cbded58 795 newscreen = kmalloc(new_screen_size, GFP_USER);
1da177e4
LT		 796 if (!newscreen)
797 return -ENOMEM;
798
799 old_rows = vc->vc_rows;
800 old_cols = vc->vc_cols;
801 old_row_size = vc->vc_size_row;
802 old_screen_size = vc->vc_screenbuf_size;
803
804 err = resize_screen(vc, new_cols, new_rows);
805 if (err) {
806 kfree(newscreen);
807 return err;
808 }
809
810 vc->vc_rows = new_rows;
811 vc->vc_cols = new_cols;
812 vc->vc_size_row = new_row_size;
813 vc->vc_screenbuf_size = new_screen_size;
814
815 rlth = min(old_row_size, new_row_size);
816 rrem = new_row_size - rlth;
817 old_origin = vc->vc_origin;
818 new_origin = (long) newscreen;
819 new_scr_end = new_origin + new_screen_size;
3b41dc1a
AD		 820
821 if (vc->vc_y > new_rows) {
822 if (old_rows - vc->vc_y < new_rows) {
823 /*
824 * Cursor near the bottom, copy contents from the
825 * bottom of buffer
826 */
827 old_origin += (old_rows - new_rows) * old_row_size;
828 end = vc->vc_scr_end;
829 } else {
830 /*
831 * Cursor is in no man's land, copy 1/2 screenful
832 * from the top and bottom of cursor position
833 */
834 old_origin += (vc->vc_y - new_rows/2) * old_row_size;
065d9cac 835 end = old_origin + (old_row_size * new_rows);
3b41dc1a
AD		 836 }
837 } else
838 /*
839 * Cursor near the top, copy contents from the top of buffer
840 */
065d9cac
AD		 841 end = (old_rows > new_rows) ? old_origin +
842 (old_row_size * new_rows) :
3b41dc1a 843 vc->vc_scr_end;
1da177e4
LT		 844
845 update_attr(vc);
846
3b41dc1a
AD		 847 while (old_origin < end) {
848 scr_memcpyw((unsigned short *) new_origin,
849 (unsigned short *) old_origin, rlth);
1da177e4 850 if (rrem)
3b41dc1a
AD		 851 scr_memsetw((void *)(new_origin + rlth),
852 vc->vc_video_erase_char, rrem);
1da177e4
LT		 853 old_origin += old_row_size;
854 new_origin += new_row_size;
855 }
856 if (new_scr_end > new_origin)
3b41dc1a
AD		 857 scr_memsetw((void *)new_origin, vc->vc_video_erase_char,
858 new_scr_end - new_origin);
1da177e4
LT		 859 if (vc->vc_kmalloced)
860 kfree(vc->vc_screenbuf);
861 vc->vc_screenbuf = newscreen;
862 vc->vc_kmalloced = 1;
863 vc->vc_screenbuf_size = new_screen_size;
864 set_origin(vc);
865
866 /* do part of a reset_terminal() */
867 vc->vc_top = 0;
868 vc->vc_bottom = vc->vc_rows;
869 gotoxy(vc, vc->vc_x, vc->vc_y);
870 save_cur(vc);
871
872 if (vc->vc_tty) {
873 struct winsize ws, *cws = &vc->vc_tty->winsize;
874
875 memset(&ws, 0, sizeof(ws));
876 ws.ws_row = vc->vc_rows;
877 ws.ws_col = vc->vc_cols;
878 ws.ws_ypixel = vc->vc_scan_lines;
879 if ((ws.ws_row != cws->ws_row || ws.ws_col != cws->ws_col) &&
ab521dc0
EB		 880 vc->vc_tty->pgrp)
881 kill_pgrp(vc->vc_tty->pgrp, SIGWINCH, 1);
1da177e4
LT		 882 *cws = ws;
883 }
884
885 if (CON_IS_VISIBLE(vc))
886 update_screen(vc);
887 return err;
888}
889
ca9bda00
AC		 890int vc_lock_resize(struct vc_data *vc, unsigned int cols, unsigned int lines)
891{
892 int rc;
893
894 acquire_console_sem();
895 rc = vc_resize(vc, cols, lines);
896 release_console_sem();
897 return rc;
898}
1da177e4 899
ca9bda00 900void vc_deallocate(unsigned int currcons)
1da177e4
LT		 901{
902 WARN_CONSOLE_UNLOCKED();
903
904 if (vc_cons_allocated(currcons)) {
905 struct vc_data *vc = vc_cons[currcons].d;
906 vc->vc_sw->con_deinit(vc);
bde0d2c9 907 put_pid(vc->vt_pid);
d459ec0b 908 module_put(vc->vc_sw->owner);
1da177e4
LT		 909 if (vc->vc_kmalloced)
910 kfree(vc->vc_screenbuf);
911 if (currcons >= MIN_NR_CONSOLES)
912 kfree(vc);
913 vc_cons[currcons].d = NULL;
914 }
915}
916
917/*
918 * VT102 emulator
919 */
920
921#define set_kbd(vc, x) set_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
922#define clr_kbd(vc, x) clr_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
923#define is_kbd(vc, x) vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
924
925#define decarm VC_REPEAT
926#define decckm VC_CKMODE
927#define kbdapplic VC_APPLIC
928#define lnm VC_CRLF
929
930/*
931 * this is what the terminal answers to a ESC-Z or csi0c query.
932 */
933#define VT100ID "\033[?1;2c"
934#define VT102ID "\033[?6c"
935
936unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7,
937 8,12,10,14, 9,13,11,15 };
938
939/* the default colour table, for VGA+ colour systems */
940int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
941 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
942int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
943 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
944int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
945 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
946
1c2bbe6a
JE		 947module_param_array(default_red, int, NULL, S_IRUGO | S_IWUSR);
948module_param_array(default_grn, int, NULL, S_IRUGO | S_IWUSR);
949module_param_array(default_blu, int, NULL, S_IRUGO | S_IWUSR);
950
1da177e4
LT		 951/*
952 * gotoxy() must verify all boundaries, because the arguments
953 * might also be negative. If the given position is out of
954 * bounds, the cursor is placed at the nearest margin.
955 */
956static void gotoxy(struct vc_data *vc, int new_x, int new_y)
957{
958 int min_y, max_y;
959
960 if (new_x < 0)
961 vc->vc_x = 0;
962 else {
963 if (new_x >= vc->vc_cols)
964 vc->vc_x = vc->vc_cols - 1;
965 else
966 vc->vc_x = new_x;
967 }
968
969 if (vc->vc_decom) {
970 min_y = vc->vc_top;
971 max_y = vc->vc_bottom;
972 } else {
973 min_y = 0;
974 max_y = vc->vc_rows;
975 }
976 if (new_y < min_y)
977 vc->vc_y = min_y;
978 else if (new_y >= max_y)
979 vc->vc_y = max_y - 1;
980 else
981 vc->vc_y = new_y;
982 vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1);
983 vc->vc_need_wrap = 0;
984}
985
986/* for absolute user moves, when decom is set */
987static void gotoxay(struct vc_data *vc, int new_x, int new_y)
988{
989 gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y);
990}
991
992void scrollback(struct vc_data *vc, int lines)
993{
994 if (!lines)
995 lines = vc->vc_rows / 2;
996 scrolldelta(-lines);
997}
998
999void scrollfront(struct vc_data *vc, int lines)
1000{
1001 if (!lines)
1002 lines = vc->vc_rows / 2;
1003 scrolldelta(lines);
1004}
1005
1006static void lf(struct vc_data *vc)
1007{
1008 /* don't scroll if above bottom of scrolling region, or
1009 * if below scrolling region
1010 */
1011 if (vc->vc_y + 1 == vc->vc_bottom)
1012 scrup(vc, vc->vc_top, vc->vc_bottom, 1);
1013 else if (vc->vc_y < vc->vc_rows - 1) {
1014 vc->vc_y++;
1015 vc->vc_pos += vc->vc_size_row;
1016 }
1017 vc->vc_need_wrap = 0;
1018}
1019
1020static void ri(struct vc_data *vc)
1021{
1022 /* don't scroll if below top of scrolling region, or
1023 * if above scrolling region
1024 */
1025 if (vc->vc_y == vc->vc_top)
1026 scrdown(vc, vc->vc_top, vc->vc_bottom, 1);
1027 else if (vc->vc_y > 0) {
1028 vc->vc_y--;
1029 vc->vc_pos -= vc->vc_size_row;
1030 }
1031 vc->vc_need_wrap = 0;
1032}
1033
1034static inline void cr(struct vc_data *vc)
1035{
1036 vc->vc_pos -= vc->vc_x << 1;
1037 vc->vc_need_wrap = vc->vc_x = 0;
1038}
1039
1040static inline void bs(struct vc_data *vc)
1041{
1042 if (vc->vc_x) {
1043 vc->vc_pos -= 2;
1044 vc->vc_x--;
1045 vc->vc_need_wrap = 0;
1046 }
1047}
1048
1049static inline void del(struct vc_data *vc)
1050{
1051 /* ignored */
1052}
1053
1054static void csi_J(struct vc_data *vc, int vpar)
1055{
1056 unsigned int count;
1057 unsigned short * start;
1058
1059 switch (vpar) {
1060 case 0: /* erase from cursor to end of display */
1061 count = (vc->vc_scr_end - vc->vc_pos) >> 1;
1062 start = (unsigned short *)vc->vc_pos;
1063 if (DO_UPDATE(vc)) {
1064 /* do in two stages */
1065 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1066 vc->vc_cols - vc->vc_x);
1067 vc->vc_sw->con_clear(vc, vc->vc_y + 1, 0,
1068 vc->vc_rows - vc->vc_y - 1,
1069 vc->vc_cols);
1070 }
1071 break;
1072 case 1: /* erase from start to cursor */
1073 count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1;
1074 start = (unsigned short *)vc->vc_origin;
1075 if (DO_UPDATE(vc)) {
1076 /* do in two stages */
1077 vc->vc_sw->con_clear(vc, 0, 0, vc->vc_y,
1078 vc->vc_cols);
1079 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1080 vc->vc_x + 1);
1081 }
1082 break;
1083 case 2: /* erase whole display */
1084 count = vc->vc_cols * vc->vc_rows;
1085 start = (unsigned short *)vc->vc_origin;
1086 if (DO_UPDATE(vc))
1087 vc->vc_sw->con_clear(vc, 0, 0,
1088 vc->vc_rows,
1089 vc->vc_cols);
1090 break;
1091 default:
1092 return;
1093 }
1094 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1095 vc->vc_need_wrap = 0;
1096}
1097
1098static void csi_K(struct vc_data *vc, int vpar)
1099{
1100 unsigned int count;
1101 unsigned short * start;
1102
1103 switch (vpar) {
1104 case 0: /* erase from cursor to end of line */
1105 count = vc->vc_cols - vc->vc_x;
1106 start = (unsigned short *)vc->vc_pos;
1107 if (DO_UPDATE(vc))
1108 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1109 vc->vc_cols - vc->vc_x);
1110 break;
1111 case 1: /* erase from start of line to cursor */
1112 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1113 count = vc->vc_x + 1;
1114 if (DO_UPDATE(vc))
1115 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1116 vc->vc_x + 1);
1117 break;
1118 case 2: /* erase whole line */
1119 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1120 count = vc->vc_cols;
1121 if (DO_UPDATE(vc))
1122 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1123 vc->vc_cols);
1124 break;
1125 default:
1126 return;
1127 }
1128 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1129 vc->vc_need_wrap = 0;
1130}
1131
1132static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */
1133{ /* not vt100? */
1134 int count;
1135
1136 if (!vpar)
1137 vpar++;
1138 count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar;
1139
1140 scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count);
1141 if (DO_UPDATE(vc))
1142 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count);
1143 vc->vc_need_wrap = 0;
1144}
1145
1146static void default_attr(struct vc_data *vc)
1147{
1148 vc->vc_intensity = 1;
fa6ce9ab 1149 vc->vc_italic = 0;
1da177e4
LT		 1150 vc->vc_underline = 0;
1151 vc->vc_reverse = 0;
1152 vc->vc_blink = 0;
1153 vc->vc_color = vc->vc_def_color;
1154}
1155
1156/* console_sem is held */
1157static void csi_m(struct vc_data *vc)
1158{
1159 int i;
1160
1161 for (i = 0; i <= vc->vc_npar; i++)
1162 switch (vc->vc_par[i]) {
1163 case 0: /* all attributes off */
1164 default_attr(vc);
1165 break;
1166 case 1:
1167 vc->vc_intensity = 2;
1168 break;
1169 case 2:
1170 vc->vc_intensity = 0;
1171 break;
fa6ce9ab
JE		 1172 case 3:
1173 vc->vc_italic = 1;
1174 break;
1da177e4
LT		 1175 case 4:
1176 vc->vc_underline = 1;
1177 break;
1178 case 5:
1179 vc->vc_blink = 1;
1180 break;
1181 case 7:
1182 vc->vc_reverse = 1;
1183 break;
1184 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1185 * Select primary font, don't display
1186 * control chars if defined, don't set
1187 * bit 8 on output.
1188 */
1189 vc->vc_translate = set_translate(vc->vc_charset == 0
1190 ? vc->vc_G0_charset
1191 : vc->vc_G1_charset, vc);
1192 vc->vc_disp_ctrl = 0;
1193 vc->vc_toggle_meta = 0;
1194 break;
1195 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1196 * Select first alternate font, lets
1197 * chars < 32 be displayed as ROM chars.
1198 */
1199 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1200 vc->vc_disp_ctrl = 1;
1201 vc->vc_toggle_meta = 0;
1202 break;
1203 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1204 * Select second alternate font, toggle
1205 * high bit before displaying as ROM char.
1206 */
1207 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1208 vc->vc_disp_ctrl = 1;
1209 vc->vc_toggle_meta = 1;
1210 break;
1211 case 21:
1212 case 22:
1213 vc->vc_intensity = 1;
1214 break;
fa6ce9ab
JE		 1215 case 23:
1216 vc->vc_italic = 0;
1217 break;
1da177e4
LT		 1218 case 24:
1219 vc->vc_underline = 0;
1220 break;
1221 case 25:
1222 vc->vc_blink = 0;
1223 break;
1224 case 27:
1225 vc->vc_reverse = 0;
1226 break;
1227 case 38: /* ANSI X3.64-1979 (SCO-ish?)
1228 * Enables underscore, white foreground
1229 * with white underscore (Linux - use
1230 * default foreground).
1231 */
1232 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1233 vc->vc_underline = 1;
1234 break;
1235 case 39: /* ANSI X3.64-1979 (SCO-ish?)
1236 * Disable underline option.
1237 * Reset colour to default? It did this
1238 * before...
1239 */
1240 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1241 vc->vc_underline = 0;
1242 break;
1243 case 49:
1244 vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f);
1245 break;
1246 default:
1247 if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37)
1248 vc->vc_color = color_table[vc->vc_par[i] - 30]
1249 | (vc->vc_color & 0xf0);
1250 else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47)
1251 vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4)
1252 | (vc->vc_color & 0x0f);
1253 break;
1254 }
1255 update_attr(vc);
1256}
1257
1258static void respond_string(const char *p, struct tty_struct *tty)
1259{
1260 while (*p) {
1261 tty_insert_flip_char(tty, *p, 0);
1262 p++;
1263 }
1264 con_schedule_flip(tty);
1265}
1266
1267static void cursor_report(struct vc_data *vc, struct tty_struct *tty)
1268{
1269 char buf[40];
1270
1271 sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1);
1272 respond_string(buf, tty);
1273}
1274
1275static inline void status_report(struct tty_struct *tty)
1276{
1277 respond_string("\033[0n", tty); /* Terminal ok */
1278}
1279
1280static inline void respond_ID(struct tty_struct * tty)
1281{
1282 respond_string(VT102ID, tty);
1283}
1284
1285void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry)
1286{
1287 char buf[8];
1288
1289 sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx),
1290 (char)('!' + mry));
1291 respond_string(buf, tty);
1292}
1293
1294/* invoked via ioctl(TIOCLINUX) and through set_selection */
1295int mouse_reporting(void)
1296{
1297 return vc_cons[fg_console].d->vc_report_mouse;
1298}
1299
1300/* console_sem is held */
1301static void set_mode(struct vc_data *vc, int on_off)
1302{
1303 int i;
1304
1305 for (i = 0; i <= vc->vc_npar; i++)
1306 if (vc->vc_ques) {
1307 switch(vc->vc_par[i]) { /* DEC private modes set/reset */
1308 case 1: /* Cursor keys send ^[Ox/^[[x */
1309 if (on_off)
1310 set_kbd(vc, decckm);
1311 else
1312 clr_kbd(vc, decckm);
1313 break;
1314 case 3: /* 80/132 mode switch unimplemented */
1315 vc->vc_deccolm = on_off;
1316#if 0
1317 vc_resize(deccolm ? 132 : 80, vc->vc_rows);
1318 /* this alone does not suffice; some user mode
1319 utility has to change the hardware regs */
1320#endif
1321 break;
1322 case 5: /* Inverted screen on/off */
1323 if (vc->vc_decscnm != on_off) {
1324 vc->vc_decscnm = on_off;
1325 invert_screen(vc, 0, vc->vc_screenbuf_size, 0);
1326 update_attr(vc);
1327 }
1328 break;
1329 case 6: /* Origin relative/absolute */
1330 vc->vc_decom = on_off;
1331 gotoxay(vc, 0, 0);
1332 break;
1333 case 7: /* Autowrap on/off */
1334 vc->vc_decawm = on_off;
1335 break;
1336 case 8: /* Autorepeat on/off */
1337 if (on_off)
1338 set_kbd(vc, decarm);
1339 else
1340 clr_kbd(vc, decarm);
1341 break;
1342 case 9:
1343 vc->vc_report_mouse = on_off ? 1 : 0;
1344 break;
1345 case 25: /* Cursor on/off */
1346 vc->vc_deccm = on_off;
1347 break;
1348 case 1000:
1349 vc->vc_report_mouse = on_off ? 2 : 0;
1350 break;
1351 }
1352 } else {
1353 switch(vc->vc_par[i]) { /* ANSI modes set/reset */
1354 case 3: /* Monitor (display ctrls) */
1355 vc->vc_disp_ctrl = on_off;
1356 break;
1357 case 4: /* Insert Mode on/off */
1358 vc->vc_decim = on_off;
1359 break;
1360 case 20: /* Lf, Enter == CrLf/Lf */
1361 if (on_off)
1362 set_kbd(vc, lnm);
1363 else
1364 clr_kbd(vc, lnm);
1365 break;
1366 }
1367 }
1368}
1369
1370/* console_sem is held */
1371static void setterm_command(struct vc_data *vc)
1372{
1373 switch(vc->vc_par[0]) {
1374 case 1: /* set color for underline mode */
1375 if (vc->vc_can_do_color &&
1376 vc->vc_par[1] < 16) {
1377 vc->vc_ulcolor = color_table[vc->vc_par[1]];
1378 if (vc->vc_underline)
1379 update_attr(vc);
1380 }
1381 break;
1382 case 2: /* set color for half intensity mode */
1383 if (vc->vc_can_do_color &&
1384 vc->vc_par[1] < 16) {
1385 vc->vc_halfcolor = color_table[vc->vc_par[1]];
1386 if (vc->vc_intensity == 0)
1387 update_attr(vc);
1388 }
1389 break;
1390 case 8: /* store colors as defaults */
1391 vc->vc_def_color = vc->vc_attr;
1392 if (vc->vc_hi_font_mask == 0x100)
1393 vc->vc_def_color >>= 1;
1394 default_attr(vc);
1395 update_attr(vc);
1396 break;
1397 case 9: /* set blanking interval */
1398 blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1399 poke_blanked_console();
1400 break;
1401 case 10: /* set bell frequency in Hz */
1402 if (vc->vc_npar >= 1)
1403 vc->vc_bell_pitch = vc->vc_par[1];
1404 else
1405 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1406 break;
1407 case 11: /* set bell duration in msec */
1408 if (vc->vc_npar >= 1)
1409 vc->vc_bell_duration = (vc->vc_par[1] < 2000) ?
1410 vc->vc_par[1] * HZ / 1000 : 0;
1411 else
1412 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1413 break;
1414 case 12: /* bring specified console to the front */
1415 if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1))
1416 set_console(vc->vc_par[1] - 1);
1417 break;
1418 case 13: /* unblank the screen */
1419 poke_blanked_console();
1420 break;
1421 case 14: /* set vesa powerdown interval */
1422 vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1423 break;
1424 case 15: /* activate the previous console */
1425 set_console(last_console);
1426 break;
1427 }
1428}
1429
1430/* console_sem is held */
1431static void csi_at(struct vc_data *vc, unsigned int nr)
1432{
1433 if (nr > vc->vc_cols - vc->vc_x)
1434 nr = vc->vc_cols - vc->vc_x;
1435 else if (!nr)
1436 nr = 1;
1437 insert_char(vc, nr);
1438}
1439
1440/* console_sem is held */
1441static void csi_L(struct vc_data *vc, unsigned int nr)
1442{
1443 if (nr > vc->vc_rows - vc->vc_y)
1444 nr = vc->vc_rows - vc->vc_y;
1445 else if (!nr)
1446 nr = 1;
1447 scrdown(vc, vc->vc_y, vc->vc_bottom, nr);
1448 vc->vc_need_wrap = 0;
1449}
1450
1451/* console_sem is held */
1452static void csi_P(struct vc_data *vc, unsigned int nr)
1453{
1454 if (nr > vc->vc_cols - vc->vc_x)
1455 nr = vc->vc_cols - vc->vc_x;
1456 else if (!nr)
1457 nr = 1;
1458 delete_char(vc, nr);
1459}
1460
1461/* console_sem is held */
1462static void csi_M(struct vc_data *vc, unsigned int nr)
1463{
1464 if (nr > vc->vc_rows - vc->vc_y)
1465 nr = vc->vc_rows - vc->vc_y;
1466 else if (!nr)
1467 nr=1;
1468 scrup(vc, vc->vc_y, vc->vc_bottom, nr);
1469 vc->vc_need_wrap = 0;
1470}
1471
1472/* console_sem is held (except via vc_init->reset_terminal */
1473static void save_cur(struct vc_data *vc)
1474{
1475 vc->vc_saved_x = vc->vc_x;
1476 vc->vc_saved_y = vc->vc_y;
1477 vc->vc_s_intensity = vc->vc_intensity;
fa6ce9ab 1478 vc->vc_s_italic = vc->vc_italic;
1da177e4
LT		 1479 vc->vc_s_underline = vc->vc_underline;
1480 vc->vc_s_blink = vc->vc_blink;
1481 vc->vc_s_reverse = vc->vc_reverse;
1482 vc->vc_s_charset = vc->vc_charset;
1483 vc->vc_s_color = vc->vc_color;
1484 vc->vc_saved_G0 = vc->vc_G0_charset;
1485 vc->vc_saved_G1 = vc->vc_G1_charset;
1486}
1487
1488/* console_sem is held */
1489static void restore_cur(struct vc_data *vc)
1490{
1491 gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y);
1492 vc->vc_intensity = vc->vc_s_intensity;
fa6ce9ab 1493 vc->vc_italic = vc->vc_s_italic;
1da177e4
LT		 1494 vc->vc_underline = vc->vc_s_underline;
1495 vc->vc_blink = vc->vc_s_blink;
1496 vc->vc_reverse = vc->vc_s_reverse;
1497 vc->vc_charset = vc->vc_s_charset;
1498 vc->vc_color = vc->vc_s_color;
1499 vc->vc_G0_charset = vc->vc_saved_G0;
1500 vc->vc_G1_charset = vc->vc_saved_G1;
1501 vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc);
1502 update_attr(vc);
1503 vc->vc_need_wrap = 0;
1504}
1505
1506enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey,
1507 EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd,
1508 ESpalette };
1509
1510/* console_sem is held (except via vc_init()) */
1511static void reset_terminal(struct vc_data *vc, int do_clear)
1512{
1513 vc->vc_top = 0;
1514 vc->vc_bottom = vc->vc_rows;
1515 vc->vc_state = ESnormal;
1516 vc->vc_ques = 0;
1517 vc->vc_translate = set_translate(LAT1_MAP, vc);
1518 vc->vc_G0_charset = LAT1_MAP;
1519 vc->vc_G1_charset = GRAF_MAP;
1520 vc->vc_charset = 0;
1521 vc->vc_need_wrap = 0;
1522 vc->vc_report_mouse = 0;
042f10ec 1523 vc->vc_utf = default_utf8;
1da177e4
LT		 1524 vc->vc_utf_count = 0;
1525
1526 vc->vc_disp_ctrl = 0;
1527 vc->vc_toggle_meta = 0;
1528
1529 vc->vc_decscnm = 0;
1530 vc->vc_decom = 0;
1531 vc->vc_decawm = 1;
1532 vc->vc_deccm = 1;
1533 vc->vc_decim = 0;
1534
1535 set_kbd(vc, decarm);
1536 clr_kbd(vc, decckm);
1537 clr_kbd(vc, kbdapplic);
1538 clr_kbd(vc, lnm);
1539 kbd_table[vc->vc_num].lockstate = 0;
1540 kbd_table[vc->vc_num].slockstate = 0;
1541 kbd_table[vc->vc_num].ledmode = LED_SHOW_FLAGS;
1542 kbd_table[vc->vc_num].ledflagstate = kbd_table[vc->vc_num].default_ledflagstate;
1543 /* do not do set_leds here because this causes an endless tasklet loop
1544 when the keyboard hasn't been initialized yet */
1545
1546 vc->vc_cursor_type = CUR_DEFAULT;
1547 vc->vc_complement_mask = vc->vc_s_complement_mask;
1548
1549 default_attr(vc);
1550 update_attr(vc);
1551
1552 vc->vc_tab_stop[0] = 0x01010100;
1553 vc->vc_tab_stop[1] =
1554 vc->vc_tab_stop[2] =
1555 vc->vc_tab_stop[3] =
1556 vc->vc_tab_stop[4] = 0x01010101;
1557
1558 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1559 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1560
1561 gotoxy(vc, 0, 0);
1562 save_cur(vc);
1563 if (do_clear)
1564 csi_J(vc, 2);
1565}
1566
1567/* console_sem is held */
1568static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
1569{
1570 /*
1571 * Control characters can be used in the _middle_
1572 * of an escape sequence.
1573 */
1574 switch (c) {
1575 case 0:
1576 return;
1577 case 7:
1578 if (vc->vc_bell_duration)
1579 kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration);
1580 return;
1581 case 8:
1582 bs(vc);
1583 return;
1584 case 9:
1585 vc->vc_pos -= (vc->vc_x << 1);
1586 while (vc->vc_x < vc->vc_cols - 1) {
1587 vc->vc_x++;
1588 if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31)))
1589 break;
1590 }
1591 vc->vc_pos += (vc->vc_x << 1);
1592 return;
1593 case 10: case 11: case 12:
1594 lf(vc);
1595 if (!is_kbd(vc, lnm))
1596 return;
1597 case 13:
1598 cr(vc);
1599 return;
1600 case 14:
1601 vc->vc_charset = 1;
1602 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1603 vc->vc_disp_ctrl = 1;
1604 return;
1605 case 15:
1606 vc->vc_charset = 0;
1607 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1608 vc->vc_disp_ctrl = 0;
1609 return;
1610 case 24: case 26:
1611 vc->vc_state = ESnormal;
1612 return;
1613 case 27:
1614 vc->vc_state = ESesc;
1615 return;
1616 case 127:
1617 del(vc);
1618 return;
1619 case 128+27:
1620 vc->vc_state = ESsquare;
1621 return;
1622 }
1623 switch(vc->vc_state) {
1624 case ESesc:
1625 vc->vc_state = ESnormal;
1626 switch (c) {
1627 case '[':
1628 vc->vc_state = ESsquare;
1629 return;
1630 case ']':
1631 vc->vc_state = ESnonstd;
1632 return;
1633 case '%':
1634 vc->vc_state = ESpercent;
1635 return;
1636 case 'E':
1637 cr(vc);
1638 lf(vc);
1639 return;
1640 case 'M':
1641 ri(vc);
1642 return;
1643 case 'D':
1644 lf(vc);
1645 return;
1646 case 'H':
1647 vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31));
1648 return;
1649 case 'Z':
1650 respond_ID(tty);
1651 return;
1652 case '7':
1653 save_cur(vc);
1654 return;
1655 case '8':
1656 restore_cur(vc);
1657 return;
1658 case '(':
1659 vc->vc_state = ESsetG0;
1660 return;
1661 case ')':
1662 vc->vc_state = ESsetG1;
1663 return;
1664 case '#':
1665 vc->vc_state = EShash;
1666 return;
1667 case 'c':
1668 reset_terminal(vc, 1);
1669 return;
1670 case '>': /* Numeric keypad */
1671 clr_kbd(vc, kbdapplic);
1672 return;
1673 case '=': /* Appl. keypad */
1674 set_kbd(vc, kbdapplic);
1675 return;
1676 }
1677 return;
1678 case ESnonstd:
1679 if (c=='P') { /* palette escape sequence */
1680 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1681 vc->vc_par[vc->vc_npar] = 0;
1682 vc->vc_npar = 0;
1683 vc->vc_state = ESpalette;
1684 return;
1685 } else if (c=='R') { /* reset palette */
1686 reset_palette(vc);
1687 vc->vc_state = ESnormal;
1688 } else
1689 vc->vc_state = ESnormal;
1690 return;
1691 case ESpalette:
1692 if ( (c>='0'&&c<='9') || (c>='A'&&c<='F') || (c>='a'&&c<='f') ) {
1693 vc->vc_par[vc->vc_npar++] = (c > '9' ? (c & 0xDF) - 'A' + 10 : c - '0');
1694 if (vc->vc_npar == 7) {
1695 int i = vc->vc_par[0] * 3, j = 1;
1696 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1697 vc->vc_palette[i++] += vc->vc_par[j++];
1698 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1699 vc->vc_palette[i++] += vc->vc_par[j++];
1700 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1701 vc->vc_palette[i] += vc->vc_par[j];
1702 set_palette(vc);
1703 vc->vc_state = ESnormal;
1704 }
1705 } else
1706 vc->vc_state = ESnormal;
1707 return;
1708 case ESsquare:
1709 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1710 vc->vc_par[vc->vc_npar] = 0;
1711 vc->vc_npar = 0;
1712 vc->vc_state = ESgetpars;
1713 if (c == '[') { /* Function key */
1714 vc->vc_state=ESfunckey;
1715 return;
1716 }
1717 vc->vc_ques = (c == '?');
1718 if (vc->vc_ques)
1719 return;
1720 case ESgetpars:
1721 if (c == ';' && vc->vc_npar < NPAR - 1) {
1722 vc->vc_npar++;
1723 return;
1724 } else if (c>='0' && c<='9') {
1725 vc->vc_par[vc->vc_npar] *= 10;
1726 vc->vc_par[vc->vc_npar] += c - '0';
1727 return;
1728 } else
1729 vc->vc_state = ESgotpars;
1730 case ESgotpars:
1731 vc->vc_state = ESnormal;
1732 switch(c) {
1733 case 'h':
1734 set_mode(vc, 1);
1735 return;
1736 case 'l':
1737 set_mode(vc, 0);
1738 return;
1739 case 'c':
1740 if (vc->vc_ques) {
1741 if (vc->vc_par[0])
1742 vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16);
1743 else
1744 vc->vc_cursor_type = CUR_DEFAULT;
1745 return;
1746 }
1747 break;
1748 case 'm':
1749 if (vc->vc_ques) {
1750 clear_selection();
1751 if (vc->vc_par[0])
1752 vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1];
1753 else
1754 vc->vc_complement_mask = vc->vc_s_complement_mask;
1755 return;
1756 }
1757 break;
1758 case 'n':
1759 if (!vc->vc_ques) {
1760 if (vc->vc_par[0] == 5)
1761 status_report(tty);
1762 else if (vc->vc_par[0] == 6)
1763 cursor_report(vc, tty);
1764 }
1765 return;
1766 }
1767 if (vc->vc_ques) {
1768 vc->vc_ques = 0;
1769 return;
1770 }
1771 switch(c) {
1772 case 'G': case '`':
1773 if (vc->vc_par[0])
1774 vc->vc_par[0]--;
1775 gotoxy(vc, vc->vc_par[0], vc->vc_y);
1776 return;
1777 case 'A':
1778 if (!vc->vc_par[0])
1779 vc->vc_par[0]++;
1780 gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]);
1781 return;
1782 case 'B': case 'e':
1783 if (!vc->vc_par[0])
1784 vc->vc_par[0]++;
1785 gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]);
1786 return;
1787 case 'C': case 'a':
1788 if (!vc->vc_par[0])
1789 vc->vc_par[0]++;
1790 gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y);
1791 return;
1792 case 'D':
1793 if (!vc->vc_par[0])
1794 vc->vc_par[0]++;
1795 gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y);
1796 return;
1797 case 'E':
1798 if (!vc->vc_par[0])
1799 vc->vc_par[0]++;
1800 gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]);
1801 return;
1802 case 'F':
1803 if (!vc->vc_par[0])
1804 vc->vc_par[0]++;
1805 gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]);
1806 return;
1807 case 'd':
1808 if (vc->vc_par[0])
1809 vc->vc_par[0]--;
1810 gotoxay(vc, vc->vc_x ,vc->vc_par[0]);
1811 return;
1812 case 'H': case 'f':
1813 if (vc->vc_par[0])
1814 vc->vc_par[0]--;
1815 if (vc->vc_par[1])
1816 vc->vc_par[1]--;
1817 gotoxay(vc, vc->vc_par[1], vc->vc_par[0]);
1818 return;
1819 case 'J':
1820 csi_J(vc, vc->vc_par[0]);
1821 return;
1822 case 'K':
1823 csi_K(vc, vc->vc_par[0]);
1824 return;
1825 case 'L':
1826 csi_L(vc, vc->vc_par[0]);
1827 return;
1828 case 'M':
1829 csi_M(vc, vc->vc_par[0]);
1830 return;
1831 case 'P':
1832 csi_P(vc, vc->vc_par[0]);
1833 return;
1834 case 'c':
1835 if (!vc->vc_par[0])
1836 respond_ID(tty);
1837 return;
1838 case 'g':
1839 if (!vc->vc_par[0])
1840 vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31));
1841 else if (vc->vc_par[0] == 3) {
1842 vc->vc_tab_stop[0] =
1843 vc->vc_tab_stop[1] =
1844 vc->vc_tab_stop[2] =
1845 vc->vc_tab_stop[3] =
1846 vc->vc_tab_stop[4] = 0;
1847 }
1848 return;
1849 case 'm':
1850 csi_m(vc);
1851 return;
1852 case 'q': /* DECLL - but only 3 leds */
1853 /* map 0,1,2,3 to 0,1,2,4 */
1854 if (vc->vc_par[0] < 4)
1855 setledstate(kbd_table + vc->vc_num,
1856 (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4);
1857 return;
1858 case 'r':
1859 if (!vc->vc_par[0])
1860 vc->vc_par[0]++;
1861 if (!vc->vc_par[1])
1862 vc->vc_par[1] = vc->vc_rows;
1863 /* Minimum allowed region is 2 lines */
1864 if (vc->vc_par[0] < vc->vc_par[1] &&
1865 vc->vc_par[1] <= vc->vc_rows) {
1866 vc->vc_top = vc->vc_par[0] - 1;
1867 vc->vc_bottom = vc->vc_par[1];
1868 gotoxay(vc, 0, 0);
1869 }
1870 return;
1871 case 's':
1872 save_cur(vc);
1873 return;
1874 case 'u':
1875 restore_cur(vc);
1876 return;
1877 case 'X':
1878 csi_X(vc, vc->vc_par[0]);
1879 return;
1880 case '@':
1881 csi_at(vc, vc->vc_par[0]);
1882 return;
1883 case ']': /* setterm functions */
1884 setterm_command(vc);
1885 return;
1886 }
1887 return;
1888 case ESpercent:
1889 vc->vc_state = ESnormal;
1890 switch (c) {
1891 case '@': /* defined in ISO 2022 */
1892 vc->vc_utf = 0;
1893 return;
1894 case 'G': /* prelim official escape code */
1895 case '8': /* retained for compatibility */
1896 vc->vc_utf = 1;
1897 return;
1898 }
1899 return;
1900 case ESfunckey:
1901 vc->vc_state = ESnormal;
1902 return;
1903 case EShash:
1904 vc->vc_state = ESnormal;
1905 if (c == '8') {
1906 /* DEC screen alignment test. kludge :-) */
1907 vc->vc_video_erase_char =
1908 (vc->vc_video_erase_char & 0xff00) | 'E';
1909 csi_J(vc, 2);
1910 vc->vc_video_erase_char =
1911 (vc->vc_video_erase_char & 0xff00) | ' ';
1912 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
1913 }
1914 return;
1915 case ESsetG0:
1916 if (c == '0')
1917 vc->vc_G0_charset = GRAF_MAP;
1918 else if (c == 'B')
1919 vc->vc_G0_charset = LAT1_MAP;
1920 else if (c == 'U')
1921 vc->vc_G0_charset = IBMPC_MAP;
1922 else if (c == 'K')
1923 vc->vc_G0_charset = USER_MAP;
1924 if (vc->vc_charset == 0)
1925 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1926 vc->vc_state = ESnormal;
1927 return;
1928 case ESsetG1:
1929 if (c == '0')
1930 vc->vc_G1_charset = GRAF_MAP;
1931 else if (c == 'B')
1932 vc->vc_G1_charset = LAT1_MAP;
1933 else if (c == 'U')
1934 vc->vc_G1_charset = IBMPC_MAP;
1935 else if (c == 'K')
1936 vc->vc_G1_charset = USER_MAP;
1937 if (vc->vc_charset == 1)
1938 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1939 vc->vc_state = ESnormal;
1940 return;
1941 default:
1942 vc->vc_state = ESnormal;
1943 }
1944}
1945
1946/* This is a temporary buffer used to prepare a tty console write
1947 * so that we can easily avoid touching user space while holding the
1948 * console spinlock. It is allocated in con_init and is shared by
1949 * this code and the vc_screen read/write tty calls.
1950 *
1951 * We have to allocate this statically in the kernel data section
1952 * since console_init (and thus con_init) are called before any
1953 * kernel memory allocation is available.
1954 */
1955char con_buf[CON_BUF_SIZE];
c831c338 1956DEFINE_MUTEX(con_buf_mtx);
1da177e4 1957
2f1a2ccb
EK		 1958/* is_double_width() is based on the wcwidth() implementation by
1959 * Markus Kuhn -- 2003-05-20 (Unicode 4.0)
1960 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
1961 */
1962struct interval {
1963 uint32_t first;
1964 uint32_t last;
1965};
1966
1967static int bisearch(uint32_t ucs, const struct interval *table, int max)
1968{
1969 int min = 0;
1970 int mid;
1971
1972 if (ucs < table[0].first || ucs > table[max].last)
1973 return 0;
1974 while (max >= min) {
1975 mid = (min + max) / 2;
1976 if (ucs > table[mid].last)
1977 min = mid + 1;
1978 else if (ucs < table[mid].first)
1979 max = mid - 1;
1980 else
1981 return 1;
1982 }
1983 return 0;
1984}
1985
1986static int is_double_width(uint32_t ucs)
1987{
1988 static const struct interval double_width[] = {
1989 { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E },
1990 { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF },
1991 { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 }, { 0xFFE0, 0xFFE6 },
1992 { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD }
1993 };
1994 return bisearch(ucs, double_width,
1995 sizeof(double_width) / sizeof(*double_width) - 1);
1996}
1997
1da177e4
LT		 1998/* acquires console_sem */
1999static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2000{
2001#ifdef VT_BUF_VRAM_ONLY
2002#define FLUSH do { } while(0);
2003#else
2004#define FLUSH if (draw_x >= 0) { \
2005 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
2006 draw_x = -1; \
2007 }
2008#endif
2009
2010 int c, tc, ok, n = 0, draw_x = -1;
2011 unsigned int currcons;
2012 unsigned long draw_from = 0, draw_to = 0;
2013 struct vc_data *vc;
2f1a2ccb
EK		 2014 unsigned char vc_attr;
2015 uint8_t rescan;
2016 uint8_t inverse;
2017 uint8_t width;
1da177e4
LT		 2018 u16 himask, charmask;
2019 const unsigned char *orig_buf = NULL;
2020 int orig_count;
2021
2022 if (in_interrupt())
2023 return count;
2024
2025 might_sleep();
2026
2027 acquire_console_sem();
2028 vc = tty->driver_data;
2029 if (vc == NULL) {
2030 printk(KERN_ERR "vt: argh, driver_data is NULL !\n");
2031 release_console_sem();
2032 return 0;
2033 }
2034
2035 currcons = vc->vc_num;
2036 if (!vc_cons_allocated(currcons)) {
2037 /* could this happen? */
2038 static int error = 0;
2039 if (!error) {
2040 error = 1;
2041 printk("con_write: tty %d not allocated\n", currcons+1);
2042 }
2043 release_console_sem();
2044 return 0;
2045 }
2046 release_console_sem();
2047
2048 orig_buf = buf;
2049 orig_count = count;
2050
2051 /* At this point 'buf' is guaranteed to be a kernel buffer
2052 * and therefore no access to userspace (and therefore sleeping)
c831c338 2053 * will be needed. The con_buf_mtx serializes all tty based
1da177e4
LT		 2054 * console rendering and vcs write/read operations. We hold
2055 * the console spinlock during the entire write.
2056 */
2057
2058 acquire_console_sem();
2059
2060 vc = tty->driver_data;
2061 if (vc == NULL) {
2062 printk(KERN_ERR "vt: argh, driver_data _became_ NULL !\n");
2063 release_console_sem();
2064 goto out;
2065 }
2066
2067 himask = vc->vc_hi_font_mask;
2068 charmask = himask ? 0x1ff : 0xff;
2069
2070 /* undraw cursor first */
2071 if (IS_FG(vc))
2072 hide_cursor(vc);
2073
2074 while (!tty->stopped && count) {
2075 int orig = *buf;
2076 c = orig;
2077 buf++;
2078 n++;
2079 count--;
2f1a2ccb
EK		 2080 rescan = 0;
2081 inverse = 0;
2082 width = 1;
1da177e4
LT		 2083
2084 /* Do no translation at all in control states */
2085 if (vc->vc_state != ESnormal) {
2086 tc = c;
d4328b40 2087 } else if (vc->vc_utf && !vc->vc_disp_ctrl) {
2f1a2ccb
EK		 2088 /* Combine UTF-8 into Unicode in vc_utf_char.
2089 * vc_utf_count is the number of continuation bytes still
2090 * expected to arrive.
2091 * vc_npar is the number of continuation bytes arrived so
2092 * far
2093 */
d4328b40 2094rescan_last_byte:
2f1a2ccb
EK		 2095 if ((c & 0xc0) == 0x80) {
2096 /* Continuation byte received */
2097 static const uint32_t utf8_length_changes[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff };
d4328b40 2098 if (vc->vc_utf_count) {
2f1a2ccb
EK		 2099 vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f);
2100 vc->vc_npar++;
2101 if (--vc->vc_utf_count) {
2102 /* Still need some bytes */
1da177e4 2103 continue;
2f1a2ccb
EK		 2104 }
2105 /* Got a whole character */
2106 c = vc->vc_utf_char;
2107 /* Reject overlong sequences */
2108 if (c <= utf8_length_changes[vc->vc_npar - 1] ||
2109 c > utf8_length_changes[vc->vc_npar])
2110 c = 0xfffd;
2111 } else {
2112 /* Unexpected continuation byte */
2113 vc->vc_utf_count = 0;
2114 c = 0xfffd;
2115 }
1da177e4 2116 } else {
2f1a2ccb
EK		 2117 /* Single ASCII byte or first byte of a sequence received */
2118 if (vc->vc_utf_count) {
2119 /* Continuation byte expected */
2120 rescan = 1;
2121 vc->vc_utf_count = 0;
2122 c = 0xfffd;
2123 } else if (c > 0x7f) {
2124 /* First byte of a multibyte sequence received */
2125 vc->vc_npar = 0;
2126 if ((c & 0xe0) == 0xc0) {
2127 vc->vc_utf_count = 1;
2128 vc->vc_utf_char = (c & 0x1f);
2129 } else if ((c & 0xf0) == 0xe0) {
2130 vc->vc_utf_count = 2;
2131 vc->vc_utf_char = (c & 0x0f);
2132 } else if ((c & 0xf8) == 0xf0) {
2133 vc->vc_utf_count = 3;
2134 vc->vc_utf_char = (c & 0x07);
2135 } else if ((c & 0xfc) == 0xf8) {
2136 vc->vc_utf_count = 4;
2137 vc->vc_utf_char = (c & 0x03);
2138 } else if ((c & 0xfe) == 0xfc) {
2139 vc->vc_utf_count = 5;
2140 vc->vc_utf_char = (c & 0x01);
2141 } else {
2142 /* 254 and 255 are invalid */
2143 c = 0xfffd;
2144 }
2145 if (vc->vc_utf_count) {
2146 /* Still need some bytes */
2147 continue;
2148 }
2149 }
2150 /* Nothing to do if an ASCII byte was received */
1da177e4 2151 }
2f1a2ccb
EK		 2152 /* End of UTF-8 decoding. */
2153 /* c is the received character, or U+FFFD for invalid sequences. */
2154 /* Replace invalid Unicode code points with U+FFFD too */
2155 if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff)
2156 c = 0xfffd;
2157 tc = c;
d4328b40 2158 } else { /* no utf or alternate charset mode */
2f1a2ccb 2159 tc = vc->vc_translate[vc->vc_toggle_meta ? (c | 0x80) : c];
1da177e4
LT		 2160 }
2161
2162 /* If the original code was a control character we
2163 * only allow a glyph to be displayed if the code is
2164 * not normally used (such as for cursor movement) or
2165 * if the disp_ctrl mode has been explicitly enabled.
2166 * Certain characters (as given by the CTRL_ALWAYS
2167 * bitmap) are always displayed as control characters,
2168 * as the console would be pretty useless without
2169 * them; to display an arbitrary font position use the
2170 * direct-to-font zone in UTF-8 mode.
2171 */
2172 ok = tc && (c >= 32 ||
d4328b40
AT		 2173 !(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 :
2174 vc->vc_utf || ((CTRL_ACTION >> c) & 1)))
1da177e4
LT		 2175 && (c != 127 || vc->vc_disp_ctrl)
2176 && (c != 128+27);
2177
2178 if (vc->vc_state == ESnormal && ok) {
2f1a2ccb
EK		 2179 if (vc->vc_utf && !vc->vc_disp_ctrl) {
2180 if (is_double_width(c))
2181 width = 2;
2182 }
1da177e4
LT		 2183 /* Now try to find out how to display it */
2184 tc = conv_uni_to_pc(vc, tc);
d4328b40 2185 if (tc & ~charmask) {
2f1a2ccb
EK		 2186 if (tc == -1 || tc == -2) {
2187 continue; /* nothing to display */
2188 }
2189 /* Glyph not found */
2190 if (!(vc->vc_utf && !vc->vc_disp_ctrl) && !(c & ~charmask)) {
2191 /* In legacy mode use the glyph we get by a 1:1 mapping.
2192 This would make absolutely no sense with Unicode in mind. */
2193 tc = c;
2194 } else {
2195 /* Display U+FFFD. If it's not found, display an inverse question mark. */
2196 tc = conv_uni_to_pc(vc, 0xfffd);
2197 if (tc < 0) {
2198 inverse = 1;
2199 tc = conv_uni_to_pc(vc, '?');
2200 if (tc < 0) tc = '?';
2201 }
2202 }
d4328b40 2203 }
1da177e4 2204
2f1a2ccb
EK		 2205 if (!inverse) {
2206 vc_attr = vc->vc_attr;
1da177e4 2207 } else {
2f1a2ccb
EK		 2208 /* invert vc_attr */
2209 if (!vc->vc_can_do_color) {
2210 vc_attr = (vc->vc_attr) ^ 0x08;
2211 } else if (vc->vc_hi_font_mask == 0x100) {
2212 vc_attr = ((vc->vc_attr) & 0x11) | (((vc->vc_attr) & 0xe0) >> 4) | (((vc->vc_attr) & 0x0e) << 4);
2213 } else {
2214 vc_attr = ((vc->vc_attr) & 0x88) | (((vc->vc_attr) & 0x70) >> 4) | (((vc->vc_attr) & 0x07) << 4);
2215 }
1da177e4 2216 }
2f1a2ccb
EK		 2217
2218 while (1) {
2219 if (vc->vc_need_wrap || vc->vc_decim)
2220 FLUSH
2221 if (vc->vc_need_wrap) {
2222 cr(vc);
2223 lf(vc);
2224 }
2225 if (vc->vc_decim)
2226 insert_char(vc, 1);
2227 scr_writew(himask ?
2228 ((vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) :
2229 (vc_attr << 8) + tc,
2230 (u16 *) vc->vc_pos);
2231 if (DO_UPDATE(vc) && draw_x < 0) {
2232 draw_x = vc->vc_x;
2233 draw_from = vc->vc_pos;
2234 }
2235 if (vc->vc_x == vc->vc_cols - 1) {
2236 vc->vc_need_wrap = vc->vc_decawm;
2237 draw_to = vc->vc_pos + 2;
2238 } else {
2239 vc->vc_x++;
2240 draw_to = (vc->vc_pos += 2);
d4328b40 2241 }
2f1a2ccb
EK		 2242
2243 if (!--width) break;
2244
2245 tc = conv_uni_to_pc(vc, ' '); /* A space is printed in the second column */
2246 if (tc < 0) tc = ' ';
2247 }
2248
2249 if (rescan) {
2250 rescan = 0;
2251 inverse = 0;
2252 width = 1;
d4328b40
AT		 2253 c = orig;
2254 goto rescan_last_byte;
2255 }
1da177e4
LT		 2256 continue;
2257 }
2258 FLUSH
2259 do_con_trol(tty, vc, orig);
2260 }
2261 FLUSH
2262 console_conditional_schedule();
2263 release_console_sem();
2264
2265out:
2266 return n;
2267#undef FLUSH
2268}
2269
2270/*
2271 * This is the console switching callback.
2272 *
2273 * Doing console switching in a process context allows
2274 * us to do the switches asynchronously (needed when we want
2275 * to switch due to a keyboard interrupt). Synchronization
2276 * with other console code and prevention of re-entrancy is
2277 * ensured with console_sem.
2278 */
65f27f38 2279static void console_callback(struct work_struct *ignored)
1da177e4
LT		 2280{
2281 acquire_console_sem();
2282
2283 if (want_console >= 0) {
2284 if (want_console != fg_console &&
2285 vc_cons_allocated(want_console)) {
2286 hide_cursor(vc_cons[fg_console].d);
2287 change_console(vc_cons[want_console].d);
2288 /* we only changed when the console had already
2289 been allocated - a new console is not created
2290 in an interrupt routine */
2291 }
2292 want_console = -1;
2293 }
2294 if (do_poke_blanked_console) { /* do not unblank for a LED change */
2295 do_poke_blanked_console = 0;
2296 poke_blanked_console();
2297 }
2298 if (scrollback_delta) {
2299 struct vc_data *vc = vc_cons[fg_console].d;
2300 clear_selection();
2301 if (vc->vc_mode == KD_TEXT)
2302 vc->vc_sw->con_scrolldelta(vc, scrollback_delta);
2303 scrollback_delta = 0;
2304 }
2305 if (blank_timer_expired) {
2306 do_blank_screen(0);
2307 blank_timer_expired = 0;
2308 }
2309
2310 release_console_sem();
2311}
2312
b257bc05 2313int set_console(int nr)
1da177e4 2314{
b257bc05
AJ		 2315 struct vc_data *vc = vc_cons[fg_console].d;
2316
2317 if (!vc_cons_allocated(nr) || vt_dont_switch ||
2318 (vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) {
2319
2320 /*
2321 * Console switch will fail in console_callback() or
2322 * change_console() so there is no point scheduling
2323 * the callback
2324 *
2325 * Existing set_console() users don't check the return
2326 * value so this shouldn't break anything
2327 */
2328 return -EINVAL;
2329 }
2330
1da177e4
LT		 2331 want_console = nr;
2332 schedule_console_callback();
b257bc05
AJ		 2333
2334 return 0;
1da177e4
LT		 2335}
2336
2337struct tty_driver *console_driver;
2338
2339#ifdef CONFIG_VT_CONSOLE
2340
2341/*
2342 * Console on virtual terminal
2343 *
2344 * The console must be locked when we get here.
2345 */
2346
2347static void vt_console_print(struct console *co, const char *b, unsigned count)
2348{
2349 struct vc_data *vc = vc_cons[fg_console].d;
2350 unsigned char c;
2351 static unsigned long printing;
2352 const ushort *start;
2353 ushort cnt = 0;
2354 ushort myx;
2355
2356 /* console busy or not yet initialized */
2357 if (!printable || test_and_set_bit(0, &printing))
2358 return;
2359
2360 if (kmsg_redirect && vc_cons_allocated(kmsg_redirect - 1))
2361 vc = vc_cons[kmsg_redirect - 1].d;
2362
2363 /* read `x' only after setting currcons properly (otherwise
2364 the `x' macro will read the x of the foreground console). */
2365 myx = vc->vc_x;
2366
2367 if (!vc_cons_allocated(fg_console)) {
2368 /* impossible */
2369 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2370 goto quit;
2371 }
2372
2373 if (vc->vc_mode != KD_TEXT)
2374 goto quit;
2375
2376 /* undraw cursor first */
2377 if (IS_FG(vc))
2378 hide_cursor(vc);
2379
2380 start = (ushort *)vc->vc_pos;
2381
2382 /* Contrived structure to try to emulate original need_wrap behaviour
2383 * Problems caused when we have need_wrap set on '\n' character */
2384 while (count--) {
2385 c = *b++;
2386 if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) {
2387 if (cnt > 0) {
2388 if (CON_IS_VISIBLE(vc))
2389 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2390 vc->vc_x += cnt;
2391 if (vc->vc_need_wrap)
2392 vc->vc_x--;
2393 cnt = 0;
2394 }
2395 if (c == 8) { /* backspace */
2396 bs(vc);
2397 start = (ushort *)vc->vc_pos;
2398 myx = vc->vc_x;
2399 continue;
2400 }
2401 if (c != 13)
2402 lf(vc);
2403 cr(vc);
2404 start = (ushort *)vc->vc_pos;
2405 myx = vc->vc_x;
2406 if (c == 10 || c == 13)
2407 continue;
2408 }
2409 scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos);
2410 cnt++;
2411 if (myx == vc->vc_cols - 1) {
2412 vc->vc_need_wrap = 1;
2413 continue;
2414 }
2415 vc->vc_pos += 2;
2416 myx++;
2417 }
2418 if (cnt > 0) {
2419 if (CON_IS_VISIBLE(vc))
2420 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2421 vc->vc_x += cnt;
2422 if (vc->vc_x == vc->vc_cols) {
2423 vc->vc_x--;
2424 vc->vc_need_wrap = 1;
2425 }
2426 }
2427 set_cursor(vc);
2428
2429quit:
2430 clear_bit(0, &printing);
2431}
2432
2433static struct tty_driver *vt_console_device(struct console *c, int *index)
2434{
2435 *index = c->index ? c->index-1 : fg_console;
2436 return console_driver;
2437}
2438
2439static struct console vt_console_driver = {
2440 .name = "tty",
2441 .write = vt_console_print,
2442 .device = vt_console_device,
2443 .unblank = unblank_screen,
2444 .flags = CON_PRINTBUFFER,
2445 .index = -1,
2446};
2447#endif
2448
2449/*
2450 * Handling of Linux-specific VC ioctls
2451 */
2452
2453/*
2454 * Generally a bit racy with respect to console_sem().
2455 *
2456 * There are some functions which don't need it.
2457 *
2458 * There are some functions which can sleep for arbitrary periods
2459 * (paste_selection) but we don't need the lock there anyway.
2460 *
2461 * set_selection has locking, and definitely needs it
2462 */
2463
2464int tioclinux(struct tty_struct *tty, unsigned long arg)
2465{
2466 char type, data;
2467 char __user *p = (char __user *)arg;
2468 int lines;
2469 int ret;
2470
2471 if (tty->driver->type != TTY_DRIVER_TYPE_CONSOLE)
2472 return -EINVAL;
2473 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN))
2474 return -EPERM;
2475 if (get_user(type, p))
2476 return -EFAULT;
2477 ret = 0;
2478 switch (type)
2479 {
2480 case TIOCL_SETSEL:
2481 acquire_console_sem();
2482 ret = set_selection((struct tiocl_selection __user *)(p+1), tty);
2483 release_console_sem();
2484 break;
2485 case TIOCL_PASTESEL:
2486 ret = paste_selection(tty);
2487 break;
2488 case TIOCL_UNBLANKSCREEN:
2d237c63 2489 acquire_console_sem();
1da177e4 2490 unblank_screen();
2d237c63 2491 release_console_sem();
1da177e4
LT		 2492 break;
2493 case TIOCL_SELLOADLUT:
2494 ret = sel_loadlut(p);
2495 break;
2496 case TIOCL_GETSHIFTSTATE:
2497
2498 /*
2499 * Make it possible to react to Shift+Mousebutton.
2500 * Note that 'shift_state' is an undocumented
2501 * kernel-internal variable; programs not closely
2502 * related to the kernel should not use this.
2503 */
2504 data = shift_state;
2505 ret = __put_user(data, p);
2506 break;
2507 case TIOCL_GETMOUSEREPORTING:
2508 data = mouse_reporting();
2509 ret = __put_user(data, p);
2510 break;
2511 case TIOCL_SETVESABLANK:
403aac96 2512 ret = set_vesa_blanking(p);
1da177e4 2513 break;
0ca07731
RW		 2514 case TIOCL_GETKMSGREDIRECT:
2515 data = kmsg_redirect;
2516 ret = __put_user(data, p);
2517 break;
1da177e4
LT		 2518 case TIOCL_SETKMSGREDIRECT:
2519 if (!capable(CAP_SYS_ADMIN)) {
2520 ret = -EPERM;
2521 } else {
2522 if (get_user(data, p+1))
2523 ret = -EFAULT;
2524 else
2525 kmsg_redirect = data;
2526 }
2527 break;
2528 case TIOCL_GETFGCONSOLE:
2529 ret = fg_console;
2530 break;
2531 case TIOCL_SCROLLCONSOLE:
2532 if (get_user(lines, (s32 __user *)(p+4))) {
2533 ret = -EFAULT;
2534 } else {
2535 scrollfront(vc_cons[fg_console].d, lines);
2536 ret = 0;
2537 }
2538 break;
2539 case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
2d237c63 2540 acquire_console_sem();
1da177e4
LT		 2541 ignore_poke = 1;
2542 do_blank_screen(0);
2d237c63 2543 release_console_sem();
1da177e4
LT		 2544 break;
2545 case TIOCL_BLANKEDSCREEN:
2546 ret = console_blanked;
2547 break;
2548 default:
2549 ret = -EINVAL;
2550 break;
2551 }
2552 return ret;
2553}
2554
2555/*
2556 * /dev/ttyN handling
2557 */
2558
2559static int con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2560{
2561 int retval;
2562
2563 retval = do_con_write(tty, buf, count);
2564 con_flush_chars(tty);
2565
2566 return retval;
2567}
2568
2569static void con_put_char(struct tty_struct *tty, unsigned char ch)
2570{
2571 if (in_interrupt())
2572 return; /* n_r3964 calls put_char() from interrupt context */
2573 do_con_write(tty, &ch, 1);
2574}
2575
2576static int con_write_room(struct tty_struct *tty)
2577{
2578 if (tty->stopped)
2579 return 0;
2580 return 4096; /* No limit, really; we're not buffering */
2581}
2582
2583static int con_chars_in_buffer(struct tty_struct *tty)
2584{
2585 return 0; /* we're not buffering */
2586}
2587
2588/*
2589 * con_throttle and con_unthrottle are only used for
2590 * paste_selection(), which has to stuff in a large number of
2591 * characters...
2592 */
2593static void con_throttle(struct tty_struct *tty)
2594{
2595}
2596
2597static void con_unthrottle(struct tty_struct *tty)
2598{
2599 struct vc_data *vc = tty->driver_data;
2600
2601 wake_up_interruptible(&vc->paste_wait);
2602}
2603
2604/*
2605 * Turn the Scroll-Lock LED on when the tty is stopped
2606 */
2607static void con_stop(struct tty_struct *tty)
2608{
2609 int console_num;
2610 if (!tty)
2611 return;
2612 console_num = tty->index;
2613 if (!vc_cons_allocated(console_num))
2614 return;
2615 set_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2616 set_leds();
2617}
2618
2619/*
2620 * Turn the Scroll-Lock LED off when the console is started
2621 */
2622static void con_start(struct tty_struct *tty)
2623{
2624 int console_num;
2625 if (!tty)
2626 return;
2627 console_num = tty->index;
2628 if (!vc_cons_allocated(console_num))
2629 return;
2630 clr_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2631 set_leds();
2632}
2633
2634static void con_flush_chars(struct tty_struct *tty)
2635{
2636 struct vc_data *vc;
2637
2638 if (in_interrupt()) /* from flush_to_ldisc */
2639 return;
2640
2641 /* if we race with con_close(), vt may be null */
2642 acquire_console_sem();
2643 vc = tty->driver_data;
2644 if (vc)
2645 set_cursor(vc);
2646 release_console_sem();
2647}
2648
2649/*
2650 * Allocate the console screen memory.
2651 */
2652static int con_open(struct tty_struct *tty, struct file *filp)
2653{
2654 unsigned int currcons = tty->index;
2655 int ret = 0;
2656
2657 acquire_console_sem();
f786648b 2658 if (tty->driver_data == NULL) {
1da177e4
LT		 2659 ret = vc_allocate(currcons);
2660 if (ret == 0) {
2661 struct vc_data *vc = vc_cons[currcons].d;
2662 tty->driver_data = vc;
2663 vc->vc_tty = tty;
2664
2665 if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
2666 tty->winsize.ws_row = vc_cons[currcons].d->vc_rows;
2667 tty->winsize.ws_col = vc_cons[currcons].d->vc_cols;
2668 }
2669 release_console_sem();
d09d7ddf 2670 vcs_make_sysfs(tty);
1da177e4
LT		 2671 return ret;
2672 }
2673 }
2674 release_console_sem();
2675 return ret;
2676}
2677
2678/*
70522e12 2679 * We take tty_mutex in here to prevent another thread from coming in via init_dev
1da177e4
LT		 2680 * and taking a ref against the tty while we're in the process of forgetting
2681 * about it and cleaning things up.
2682 *
d09d7ddf 2683 * This is because vcs_remove_sysfs() can sleep and will drop the BKL.
1da177e4
LT		 2684 */
2685static void con_close(struct tty_struct *tty, struct file *filp)
2686{
70522e12 2687 mutex_lock(&tty_mutex);
1da177e4
LT		 2688 acquire_console_sem();
2689 if (tty && tty->count == 1) {
2690 struct vc_data *vc = tty->driver_data;
2691
2692 if (vc)
2693 vc->vc_tty = NULL;
2694 tty->driver_data = NULL;
2695 release_console_sem();
d09d7ddf 2696 vcs_remove_sysfs(tty);
70522e12 2697 mutex_unlock(&tty_mutex);
1da177e4 2698 /*
70522e12 2699 * tty_mutex is released, but we still hold BKL, so there is
1da177e4
LT		 2700 * still exclusion against init_dev()
2701 */
2702 return;
2703 }
2704 release_console_sem();
70522e12 2705 mutex_unlock(&tty_mutex);
1da177e4
LT		 2706}
2707
fa6ce9ab
JE		 2708static int default_italic_color = 2; // green (ASCII)
2709static int default_underline_color = 3; // cyan (ASCII)
2710module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR);
2711module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR);
2712
1da177e4
LT		 2713static void vc_init(struct vc_data *vc, unsigned int rows,
2714 unsigned int cols, int do_clear)
2715{
2716 int j, k ;
2717
2718 vc->vc_cols = cols;
2719 vc->vc_rows = rows;
2720 vc->vc_size_row = cols << 1;
2721 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
2722
2723 set_origin(vc);
2724 vc->vc_pos = vc->vc_origin;
2725 reset_vc(vc);
2726 for (j=k=0; j<16; j++) {
2727 vc->vc_palette[k++] = default_red[j] ;
2728 vc->vc_palette[k++] = default_grn[j] ;
2729 vc->vc_palette[k++] = default_blu[j] ;
2730 }
2731 vc->vc_def_color = 0x07; /* white */
fa6ce9ab
JE		 2732 vc->vc_ulcolor = default_underline_color;
2733 vc->vc_itcolor = default_italic_color;
1da177e4
LT		 2734 vc->vc_halfcolor = 0x08; /* grey */
2735 init_waitqueue_head(&vc->paste_wait);
2736 reset_terminal(vc, do_clear);
2737}
2738
2739/*
2740 * This routine initializes console interrupts, and does nothing
2741 * else. If you want the screen to clear, call tty_write with
2742 * the appropriate escape-sequence.
2743 */
2744
2745static int __init con_init(void)
2746{
2747 const char *display_desc = NULL;
2748 struct vc_data *vc;
3e795de7 2749 unsigned int currcons = 0, i;
1da177e4
LT		 2750
2751 acquire_console_sem();
2752
2753 if (conswitchp)
2754 display_desc = conswitchp->con_startup();
2755 if (!display_desc) {
2756 fg_console = 0;
2757 release_console_sem();
2758 return 0;
2759 }
2760
3e795de7
AD		 2761 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2762 struct con_driver *con_driver = &registered_con_driver[i];
2763
2764 if (con_driver->con == NULL) {
2765 con_driver->con = conswitchp;
2766 con_driver->desc = display_desc;
2767 con_driver->flag = CON_DRIVER_FLAG_INIT;
2768 con_driver->first = 0;
2769 con_driver->last = MAX_NR_CONSOLES - 1;
2770 break;
2771 }
2772 }
2773
2774 for (i = 0; i < MAX_NR_CONSOLES; i++)
2775 con_driver_map[i] = conswitchp;
2776
1da177e4
LT		 2777 if (blankinterval) {
2778 blank_state = blank_normal_wait;
2779 mod_timer(&console_timer, jiffies + blankinterval);
2780 }
2781
2782 /*
2783 * kmalloc is not running yet - we use the bootmem allocator.
2784 */
2785 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) {
2786 vc_cons[currcons].d = vc = alloc_bootmem(sizeof(struct vc_data));
7f1f86a0 2787 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
1da177e4
LT		 2788 visual_init(vc, currcons, 1);
2789 vc->vc_screenbuf = (unsigned short *)alloc_bootmem(vc->vc_screenbuf_size);
2790 vc->vc_kmalloced = 0;
2791 vc_init(vc, vc->vc_rows, vc->vc_cols,
2792 currcons || !vc->vc_sw->con_save_screen);
2793 }
2794 currcons = fg_console = 0;
2795 master_display_fg = vc = vc_cons[currcons].d;
2796 set_origin(vc);
2797 save_screen(vc);
2798 gotoxy(vc, vc->vc_x, vc->vc_y);
2799 csi_J(vc, 0);
2800 update_screen(vc);
2801 printk("Console: %s %s %dx%d",
2802 vc->vc_can_do_color ? "colour" : "mono",
2803 display_desc, vc->vc_cols, vc->vc_rows);
2804 printable = 1;
2805 printk("\n");
2806
2807 release_console_sem();
2808
2809#ifdef CONFIG_VT_CONSOLE
2810 register_console(&vt_console_driver);
2811#endif
2812 return 0;
2813}
2814console_initcall(con_init);
2815
b68e31d0 2816static const struct tty_operations con_ops = {
1da177e4
LT		 2817 .open = con_open,
2818 .close = con_close,
2819 .write = con_write,
2820 .write_room = con_write_room,
2821 .put_char = con_put_char,
2822 .flush_chars = con_flush_chars,
2823 .chars_in_buffer = con_chars_in_buffer,
2824 .ioctl = vt_ioctl,
2825 .stop = con_stop,
2826 .start = con_start,
2827 .throttle = con_throttle,
2828 .unthrottle = con_unthrottle,
2829};
2830
2831int __init vty_init(void)
2832{
2833 vcs_init();
2834
2835 console_driver = alloc_tty_driver(MAX_NR_CONSOLES);
2836 if (!console_driver)
2837 panic("Couldn't allocate console driver\n");
2838 console_driver->owner = THIS_MODULE;
1da177e4
LT		 2839 console_driver->name = "tty";
2840 console_driver->name_base = 1;
2841 console_driver->major = TTY_MAJOR;
2842 console_driver->minor_start = 1;
2843 console_driver->type = TTY_DRIVER_TYPE_CONSOLE;
2844 console_driver->init_termios = tty_std_termios;
2845 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS;
2846 tty_set_operations(console_driver, &con_ops);
2847 if (tty_register_driver(console_driver))
2848 panic("Couldn't register console driver\n");
2849
2850 kbd_init();
2851 console_map_init();
2852#ifdef CONFIG_PROM_CONSOLE
2853 prom_con_init();
2854#endif
2855#ifdef CONFIG_MDA_CONSOLE
2856 mda_console_init();
2857#endif
2858 return 0;
2859}
2860
2861#ifndef VT_SINGLE_DRIVER
6db4063c
AD		 2862#include <linux/device.h>
2863
2864static struct class *vtconsole_class;
2865
3e795de7
AD		 2866static int bind_con_driver(const struct consw *csw, int first, int last,
2867 int deflt)
1da177e4 2868{
3e795de7
AD		 2869 struct module *owner = csw->owner;
2870 const char *desc = NULL;
2871 struct con_driver *con_driver;
2872 int i, j = -1, k = -1, retval = -ENODEV;
1da177e4 2873
1da177e4
LT		 2874 if (!try_module_get(owner))
2875 return -ENODEV;
2876
1c8ce271 2877 acquire_console_sem();
1c8ce271 2878
3e795de7
AD		 2879 /* check if driver is registered */
2880 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2881 con_driver = &registered_con_driver[i];
2882
2883 if (con_driver->con == csw) {
2884 desc = con_driver->desc;
2885 retval = 0;
2886 break;
2887 }
2888 }
2889
2890 if (retval)
2891 goto err;
2892
2893 if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) {
2894 csw->con_startup();
2895 con_driver->flag |= CON_DRIVER_FLAG_INIT;
1da177e4 2896 }
1c8ce271 2897
1da177e4
LT		 2898 if (deflt) {
2899 if (conswitchp)
2900 module_put(conswitchp->owner);
1c8ce271 2901
1da177e4
LT		 2902 __module_get(owner);
2903 conswitchp = csw;
2904 }
2905
3e795de7
AD		 2906 first = max(first, con_driver->first);
2907 last = min(last, con_driver->last);
2908
1da177e4
LT		 2909 for (i = first; i <= last; i++) {
2910 int old_was_color;
2911 struct vc_data *vc = vc_cons[i].d;
2912
2913 if (con_driver_map[i])
2914 module_put(con_driver_map[i]->owner);
2915 __module_get(owner);
2916 con_driver_map[i] = csw;
2917
2918 if (!vc || !vc->vc_sw)
2919 continue;
2920
2921 j = i;
1c8ce271 2922
4ee1acce
DH		 2923 if (CON_IS_VISIBLE(vc)) {
2924 k = i;
1da177e4 2925 save_screen(vc);
4ee1acce
DH		 2926 }
2927
1da177e4
LT		 2928 old_was_color = vc->vc_can_do_color;
2929 vc->vc_sw->con_deinit(vc);
2930 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
1da177e4 2931 visual_init(vc, i, 0);
1c8ce271 2932 set_origin(vc);
1da177e4
LT		 2933 update_attr(vc);
2934
2935 /* If the console changed between mono <-> color, then
2936 * the attributes in the screenbuf will be wrong. The
2937 * following resets all attributes to something sane.
2938 */
2939 if (old_was_color != vc->vc_can_do_color)
2940 clear_buffer_attributes(vc);
1da177e4 2941 }
4ee1acce 2942
1da177e4
LT		 2943 printk("Console: switching ");
2944 if (!deflt)
2945 printk("consoles %d-%d ", first+1, last+1);
4ee1acce
DH		 2946 if (j >= 0) {
2947 struct vc_data *vc = vc_cons[j].d;
2948
1da177e4 2949 printk("to %s %s %dx%d\n",
4ee1acce
DH		 2950 vc->vc_can_do_color ? "colour" : "mono",
2951 desc, vc->vc_cols, vc->vc_rows);
2952
2953 if (k >= 0) {
2954 vc = vc_cons[k].d;
2955 update_screen(vc);
2956 }
2957 } else
1da177e4
LT		 2958 printk("to %s\n", desc);
2959
3e795de7
AD		 2960 retval = 0;
2961err:
1da177e4 2962 release_console_sem();
1da177e4 2963 module_put(owner);
3e795de7
AD		 2964 return retval;
2965};
1da177e4 2966
13ae6645
AD		 2967#ifdef CONFIG_VT_HW_CONSOLE_BINDING
2968static int con_is_graphics(const struct consw *csw, int first, int last)
2969{
2970 int i, retval = 0;
2971
2972 for (i = first; i <= last; i++) {
2973 struct vc_data *vc = vc_cons[i].d;
2974
2975 if (vc && vc->vc_mode == KD_GRAPHICS) {
2976 retval = 1;
2977 break;
2978 }
2979 }
2980
2981 return retval;
2982}
2983
3e795de7
AD		 2984static int unbind_con_driver(const struct consw *csw, int first, int last,
2985 int deflt)
1da177e4 2986{
3e795de7
AD		 2987 struct module *owner = csw->owner;
2988 const struct consw *defcsw = NULL;
2989 struct con_driver *con_driver = NULL, *con_back = NULL;
2990 int i, retval = -ENODEV;
1da177e4 2991
3e795de7
AD		 2992 if (!try_module_get(owner))
2993 return -ENODEV;
2994
2995 acquire_console_sem();
2996
2997 /* check if driver is registered and if it is unbindable */
2998 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2999 con_driver = &registered_con_driver[i];
3000
3001 if (con_driver->con == csw &&
6db4063c 3002 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3e795de7
AD		 3003 retval = 0;
3004 break;
3005 }
3006 }
3007
3008 if (retval) {
3009 release_console_sem();
3010 goto err;
3011 }
3012
6db4063c
AD		 3013 retval = -ENODEV;
3014
3e795de7
AD		 3015 /* check if backup driver exists */
3016 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3017 con_back = &registered_con_driver[i];
3018
3019 if (con_back->con &&
6db4063c 3020 !(con_back->flag & CON_DRIVER_FLAG_MODULE)) {
3e795de7
AD		 3021 defcsw = con_back->con;
3022 retval = 0;
3023 break;
3024 }
3025 }
3026
3027 if (retval) {
3028 release_console_sem();
3029 goto err;
3030 }
3031
3032 if (!con_is_bound(csw)) {
3033 release_console_sem();
3034 goto err;
3035 }
3036
3037 first = max(first, con_driver->first);
3038 last = min(last, con_driver->last);
3039
3040 for (i = first; i <= last; i++) {
1da177e4
LT		 3041 if (con_driver_map[i] == csw) {
3042 module_put(csw->owner);
3043 con_driver_map[i] = NULL;
3044 }
3e795de7
AD		 3045 }
3046
3047 if (!con_is_bound(defcsw)) {
6db4063c
AD		 3048 const struct consw *defconsw = conswitchp;
3049
3e795de7
AD		 3050 defcsw->con_startup();
3051 con_back->flag |= CON_DRIVER_FLAG_INIT;
6db4063c
AD		 3052 /*
3053 * vgacon may change the default driver to point
3054 * to dummycon, we restore it here...
3055 */
3056 conswitchp = defconsw;
3e795de7
AD		 3057 }
3058
3059 if (!con_is_bound(csw))
3060 con_driver->flag &= ~CON_DRIVER_FLAG_INIT;
3061
3062 release_console_sem();
6db4063c
AD		 3063 /* ignore return value, binding should not fail */
3064 bind_con_driver(defcsw, first, last, deflt);
3e795de7
AD		 3065err:
3066 module_put(owner);
3067 return retval;
3068
3069}
3070
6db4063c
AD		 3071static int vt_bind(struct con_driver *con)
3072{
3073 const struct consw *defcsw = NULL, *csw = NULL;
3074 int i, more = 1, first = -1, last = -1, deflt = 0;
3075
3076 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3077 con_is_graphics(con->con, con->first, con->last))
3078 goto err;
3079
3080 csw = con->con;
3081
3082 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3083 struct con_driver *con = &registered_con_driver[i];
3084
3085 if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) {
3086 defcsw = con->con;
3087 break;
3088 }
3089 }
3090
3091 if (!defcsw)
3092 goto err;
3093
3094 while (more) {
3095 more = 0;
3096
3097 for (i = con->first; i <= con->last; i++) {
3098 if (con_driver_map[i] == defcsw) {
3099 if (first == -1)
3100 first = i;
3101 last = i;
3102 more = 1;
3103 } else if (first != -1)
3104 break;
3105 }
3106
3107 if (first == 0 && last == MAX_NR_CONSOLES -1)
3108 deflt = 1;
3109
3110 if (first != -1)
3111 bind_con_driver(csw, first, last, deflt);
3112
3113 first = -1;
3114 last = -1;
3115 deflt = 0;
3116 }
3117
3118err:
3119 return 0;
3120}
3121
3122static int vt_unbind(struct con_driver *con)
3123{
3124 const struct consw *csw = NULL;
3125 int i, more = 1, first = -1, last = -1, deflt = 0;
3126
3127 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3128 con_is_graphics(con->con, con->first, con->last))
3129 goto err;
3130
3131 csw = con->con;
3132
3133 while (more) {
3134 more = 0;
3135
3136 for (i = con->first; i <= con->last; i++) {
3137 if (con_driver_map[i] == csw) {
3138 if (first == -1)
3139 first = i;
3140 last = i;
3141 more = 1;
3142 } else if (first != -1)
3143 break;
3144 }
3145
3146 if (first == 0 && last == MAX_NR_CONSOLES -1)
3147 deflt = 1;
3148
3149 if (first != -1)
3150 unbind_con_driver(csw, first, last, deflt);
3151
3152 first = -1;
3153 last = -1;
3154 deflt = 0;
3155 }
3156
3157err:
3158 return 0;
3159}
13ae6645
AD		 3160#else
3161static inline int vt_bind(struct con_driver *con)
3162{
3163 return 0;
3164}
3165static inline int vt_unbind(struct con_driver *con)
3166{
3167 return 0;
3168}
3169#endif /* CONFIG_VT_HW_CONSOLE_BINDING */
6db4063c 3170
805952a8 3171static ssize_t store_bind(struct device *dev, struct device_attribute *attr,
6db4063c
AD		 3172 const char *buf, size_t count)
3173{
805952a8 3174 struct con_driver *con = dev_get_drvdata(dev);
6db4063c
AD		 3175 int bind = simple_strtoul(buf, NULL, 0);
3176
3177 if (bind)
3178 vt_bind(con);
3179 else
3180 vt_unbind(con);
3181
3182 return count;
3183}
3184
805952a8
GKH		 3185static ssize_t show_bind(struct device *dev, struct device_attribute *attr,
3186 char *buf)
6db4063c 3187{
805952a8 3188 struct con_driver *con = dev_get_drvdata(dev);
6db4063c
AD		 3189 int bind = con_is_bound(con->con);
3190
3191 return snprintf(buf, PAGE_SIZE, "%i\n", bind);
3192}
3193
805952a8
GKH		 3194static ssize_t show_name(struct device *dev, struct device_attribute *attr,
3195 char *buf)
6db4063c 3196{
805952a8 3197 struct con_driver *con = dev_get_drvdata(dev);
6db4063c
AD		 3198
3199 return snprintf(buf, PAGE_SIZE, "%s %s\n",
3200 (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)",
3201 con->desc);
3202
3203}
3204
805952a8 3205static struct device_attribute device_attrs[] = {
6db4063c
AD		 3206 __ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind),
3207 __ATTR(name, S_IRUGO, show_name, NULL),
3208};
3209
805952a8 3210static int vtconsole_init_device(struct con_driver *con)
6db4063c
AD		 3211{
3212 int i;
928e964f 3213 int error = 0;
6db4063c 3214
928e964f 3215 con->flag |= CON_DRIVER_FLAG_ATTR;
805952a8
GKH		 3216 dev_set_drvdata(con->dev, con);
3217 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3218 error = device_create_file(con->dev, &device_attrs[i]);
928e964f
AD		 3219 if (error)
3220 break;
3221 }
6db4063c 3222
928e964f
AD		 3223 if (error) {
3224 while (--i >= 0)
805952a8 3225 device_remove_file(con->dev, &device_attrs[i]);
928e964f
AD		 3226 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3227 }
3228
3229 return error;
6db4063c
AD		 3230}
3231
805952a8 3232static void vtconsole_deinit_device(struct con_driver *con)
6db4063c
AD		 3233{
3234 int i;
3235
928e964f 3236 if (con->flag & CON_DRIVER_FLAG_ATTR) {
805952a8
GKH		 3237 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3238 device_remove_file(con->dev, &device_attrs[i]);
928e964f
AD		 3239 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3240 }
6db4063c
AD		 3241}
3242
3e795de7
AD		 3243/**
3244 * con_is_bound - checks if driver is bound to the console
3245 * @csw: console driver
3246 *
3247 * RETURNS: zero if unbound, nonzero if bound
3248 *
3249 * Drivers can call this and if zero, they should release
3250 * all resources allocated on con_startup()
3251 */
3252int con_is_bound(const struct consw *csw)
3253{
3254 int i, bound = 0;
3255
3256 for (i = 0; i < MAX_NR_CONSOLES; i++) {
3257 if (con_driver_map[i] == csw) {
3258 bound = 1;
3259 break;
3260 }
3261 }
3262
3263 return bound;
3264}
3265EXPORT_SYMBOL(con_is_bound);
3266
3267/**
3268 * register_con_driver - register console driver to console layer
3269 * @csw: console driver
3270 * @first: the first console to take over, minimum value is 0
3271 * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1
3272 *
3273 * DESCRIPTION: This function registers a console driver which can later
3274 * bind to a range of consoles specified by @first and @last. It will
3275 * also initialize the console driver by calling con_startup().
3276 */
3277int register_con_driver(const struct consw *csw, int first, int last)
3278{
3279 struct module *owner = csw->owner;
3280 struct con_driver *con_driver;
3281 const char *desc;
3282 int i, retval = 0;
3283
3284 if (!try_module_get(owner))
3285 return -ENODEV;
3286
3287 acquire_console_sem();
3288
3289 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3290 con_driver = &registered_con_driver[i];
3291
3292 /* already registered */
3293 if (con_driver->con == csw)
3294 retval = -EINVAL;
3295 }
3296
3297 if (retval)
3298 goto err;
3299
3300 desc = csw->con_startup();
3301
3302 if (!desc)
3303 goto err;
3304
3305 retval = -EINVAL;
3306
3307 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3308 con_driver = &registered_con_driver[i];
3309
3310 if (con_driver->con == NULL) {
3311 con_driver->con = csw;
3312 con_driver->desc = desc;
6db4063c
AD		 3313 con_driver->node = i;
3314 con_driver->flag = CON_DRIVER_FLAG_MODULE |
3e795de7
AD		 3315 CON_DRIVER_FLAG_INIT;
3316 con_driver->first = first;
3317 con_driver->last = last;
3318 retval = 0;
3319 break;
3320 }
3321 }
3322
6db4063c
AD		 3323 if (retval)
3324 goto err;
3325
805952a8
GKH		 3326 con_driver->dev = device_create(vtconsole_class, NULL,
3327 MKDEV(0, con_driver->node),
3328 "vtcon%i", con_driver->node);
6db4063c 3329
805952a8
GKH		 3330 if (IS_ERR(con_driver->dev)) {
3331 printk(KERN_WARNING "Unable to create device for %s; "
6db4063c 3332 "errno = %ld\n", con_driver->desc,
805952a8
GKH		 3333 PTR_ERR(con_driver->dev));
3334 con_driver->dev = NULL;
6db4063c 3335 } else {
805952a8 3336 vtconsole_init_device(con_driver);
6db4063c 3337 }
928e964f 3338
3e795de7
AD		 3339err:
3340 release_console_sem();
3341 module_put(owner);
3342 return retval;
3343}
3344EXPORT_SYMBOL(register_con_driver);
3345
3346/**
3347 * unregister_con_driver - unregister console driver from console layer
3348 * @csw: console driver
3349 *
3350 * DESCRIPTION: All drivers that registers to the console layer must
3351 * call this function upon exit, or if the console driver is in a state
3352 * where it won't be able to handle console services, such as the
3353 * framebuffer console without loaded framebuffer drivers.
3354 *
3355 * The driver must unbind first prior to unregistration.
3356 */
3357int unregister_con_driver(const struct consw *csw)
3358{
3359 int i, retval = -ENODEV;
3360
3361 acquire_console_sem();
3362
3363 /* cannot unregister a bound driver */
3364 if (con_is_bound(csw))
3365 goto err;
3366
3367 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3368 struct con_driver *con_driver = &registered_con_driver[i];
3369
3370 if (con_driver->con == csw &&
6db4063c 3371 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
805952a8
GKH		 3372 vtconsole_deinit_device(con_driver);
3373 device_destroy(vtconsole_class,
3374 MKDEV(0, con_driver->node));
3e795de7
AD		 3375 con_driver->con = NULL;
3376 con_driver->desc = NULL;
805952a8 3377 con_driver->dev = NULL;
6db4063c 3378 con_driver->node = 0;
3e795de7
AD		 3379 con_driver->flag = 0;
3380 con_driver->first = 0;
3381 con_driver->last = 0;
3382 retval = 0;
3383 break;
3384 }
3385 }
3e795de7
AD		 3386err:
3387 release_console_sem();
3388 return retval;
3389}
3390EXPORT_SYMBOL(unregister_con_driver);
3391
3392/*
3393 * If we support more console drivers, this function is used
3394 * when a driver wants to take over some existing consoles
3395 * and become default driver for newly opened ones.
3396 *
3397 * take_over_console is basically a register followed by unbind
3398 */
3399int take_over_console(const struct consw *csw, int first, int last, int deflt)
3400{
3401 int err;
3402
3403 err = register_con_driver(csw, first, last);
3404
3405 if (!err)
6db4063c 3406 bind_con_driver(csw, first, last, deflt);
3e795de7
AD		 3407
3408 return err;
3409}
3410
3411/*
3412 * give_up_console is a wrapper to unregister_con_driver. It will only
3413 * work if driver is fully unbound.
3414 */
3415void give_up_console(const struct consw *csw)
3416{
3417 unregister_con_driver(csw);
3418}
3419
6db4063c 3420static int __init vtconsole_class_init(void)
3e795de7 3421{
6db4063c 3422 int i;
3e795de7 3423
6db4063c
AD		 3424 vtconsole_class = class_create(THIS_MODULE, "vtconsole");
3425 if (IS_ERR(vtconsole_class)) {
3426 printk(KERN_WARNING "Unable to create vt console class; "
3427 "errno = %ld\n", PTR_ERR(vtconsole_class));
3428 vtconsole_class = NULL;
3429 }
3e795de7 3430
6db4063c 3431 /* Add system drivers to sysfs */
3e795de7
AD		 3432 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3433 struct con_driver *con = &registered_con_driver[i];
3434
805952a8
GKH		 3435 if (con->con && !con->dev) {
3436 con->dev = device_create(vtconsole_class, NULL,
3437 MKDEV(0, con->node),
3438 "vtcon%i", con->node);
6db4063c 3439
805952a8 3440 if (IS_ERR(con->dev)) {
6db4063c 3441 printk(KERN_WARNING "Unable to create "
805952a8
GKH		 3442 "device for %s; errno = %ld\n",
3443 con->desc, PTR_ERR(con->dev));
3444 con->dev = NULL;
6db4063c 3445 } else {
805952a8 3446 vtconsole_init_device(con);
6db4063c 3447 }
3e795de7 3448 }
3e795de7
AD		 3449 }
3450
3e795de7
AD		 3451 return 0;
3452}
6db4063c 3453postcore_initcall(vtconsole_class_init);
3e795de7 3454
1da177e4
LT		 3455#endif
3456
3457/*
3458 * Screen blanking
3459 */
3460
403aac96 3461static int set_vesa_blanking(char __user *p)
1da177e4 3462{
403aac96
YY		 3463 unsigned int mode;
3464
3465 if (get_user(mode, p + 1))
3466 return -EFAULT;
3467
3468 vesa_blank_mode = (mode < 4) ? mode : 0;
3469 return 0;
1da177e4
LT		 3470}
3471
1da177e4
LT		 3472void do_blank_screen(int entering_gfx)
3473{
3474 struct vc_data *vc = vc_cons[fg_console].d;
3475 int i;
3476
3477 WARN_CONSOLE_UNLOCKED();
3478
3479 if (console_blanked) {
3480 if (blank_state == blank_vesa_wait) {
3481 blank_state = blank_off;
d060a321 3482 vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0);
1da177e4
LT		 3483 }
3484 return;
3485 }
3486 if (blank_state != blank_normal_wait)
3487 return;
3488 blank_state = blank_off;
3489
3490 /* entering graphics mode? */
3491 if (entering_gfx) {
3492 hide_cursor(vc);
3493 save_screen(vc);
3494 vc->vc_sw->con_blank(vc, -1, 1);
3495 console_blanked = fg_console + 1;
3496 set_origin(vc);
3497 return;
3498 }
3499
3500 /* don't blank graphics */
3501 if (vc->vc_mode != KD_TEXT) {
3502 console_blanked = fg_console + 1;
3503 return;
3504 }
3505
3506 hide_cursor(vc);
3507 del_timer_sync(&console_timer);
3508 blank_timer_expired = 0;
3509
3510 save_screen(vc);
3511 /* In case we need to reset origin, blanking hook returns 1 */
d060a321 3512 i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0);
1da177e4
LT		 3513 console_blanked = fg_console + 1;
3514 if (i)
3515 set_origin(vc);
3516
3517 if (console_blank_hook && console_blank_hook(1))
3518 return;
3519
d060a321 3520 if (vesa_off_interval && vesa_blank_mode) {
030babac 3521 blank_state = blank_vesa_wait;
1da177e4
LT		 3522 mod_timer(&console_timer, jiffies + vesa_off_interval);
3523 }
1da177e4
LT		 3524}
3525EXPORT_SYMBOL(do_blank_screen);
3526
3527/*
3528 * Called by timer as well as from vt_console_driver
3529 */
3530void do_unblank_screen(int leaving_gfx)
3531{
3532 struct vc_data *vc;
3533
3534 /* This should now always be called from a "sane" (read: can schedule)
3535 * context for the sake of the low level drivers, except in the special
3536 * case of oops_in_progress
3537 */
3538 if (!oops_in_progress)
3539 might_sleep();
3540
3541 WARN_CONSOLE_UNLOCKED();
3542
3543 ignore_poke = 0;
3544 if (!console_blanked)
3545 return;
3546 if (!vc_cons_allocated(fg_console)) {
3547 /* impossible */
3548 printk("unblank_screen: tty %d not allocated ??\n", fg_console+1);
3549 return;
3550 }
3551 vc = vc_cons[fg_console].d;
3552 if (vc->vc_mode != KD_TEXT)
3553 return; /* but leave console_blanked != 0 */
3554
3555 if (blankinterval) {
3556 mod_timer(&console_timer, jiffies + blankinterval);
3557 blank_state = blank_normal_wait;
3558 }
3559
3560 console_blanked = 0;
3561 if (vc->vc_sw->con_blank(vc, 0, leaving_gfx))
3562 /* Low-level driver cannot restore -> do it ourselves */
3563 update_screen(vc);
3564 if (console_blank_hook)
3565 console_blank_hook(0);
3566 set_palette(vc);
3567 set_cursor(vc);
3568}
3569EXPORT_SYMBOL(do_unblank_screen);
3570
3571/*
3572 * This is called by the outside world to cause a forced unblank, mostly for
3573 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
3574 * call it with 1 as an argument and so force a mode restore... that may kill
3575 * X or at least garbage the screen but would also make the Oops visible...
3576 */
3577void unblank_screen(void)
3578{
3579 do_unblank_screen(0);
3580}
3581
3582/*
70522e12 3583 * We defer the timer blanking to work queue so it can take the console mutex
1da177e4 3584 * (console operations can still happen at irq time, but only from printk which
70522e12 3585 * has the console mutex. Not perfect yet, but better than no locking
1da177e4
LT		 3586 */
3587static void blank_screen_t(unsigned long dummy)
3588{
cc63b1e1
JB		 3589 if (unlikely(!keventd_up())) {
3590 mod_timer(&console_timer, jiffies + blankinterval);
3591 return;
3592 }
1da177e4
LT		 3593 blank_timer_expired = 1;
3594 schedule_work(&console_work);
3595}
3596
3597void poke_blanked_console(void)
3598{
3599 WARN_CONSOLE_UNLOCKED();
3600
3601 /* Add this so we quickly catch whoever might call us in a non
3602 * safe context. Nowadays, unblank_screen() isn't to be called in
3603 * atomic contexts and is allowed to schedule (with the special case
3604 * of oops_in_progress, but that isn't of any concern for this
3605 * function. --BenH.
3606 */
3607 might_sleep();
3608
3609 /* This isn't perfectly race free, but a race here would be mostly harmless,
3610 * at worse, we'll do a spurrious blank and it's unlikely
3611 */
3612 del_timer(&console_timer);
3613 blank_timer_expired = 0;
3614
3615 if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS)
3616 return;
3617 if (console_blanked)
3618 unblank_screen();
3619 else if (blankinterval) {
3620 mod_timer(&console_timer, jiffies + blankinterval);
3621 blank_state = blank_normal_wait;
3622 }
3623}
3624
3625/*
3626 * Palettes
3627 */
3628
3629static void set_palette(struct vc_data *vc)
3630{
3631 WARN_CONSOLE_UNLOCKED();
3632
3633 if (vc->vc_mode != KD_GRAPHICS)
3634 vc->vc_sw->con_set_palette(vc, color_table);
3635}
3636
3637static int set_get_cmap(unsigned char __user *arg, int set)
3638{
3639 int i, j, k;
3640
3641 WARN_CONSOLE_UNLOCKED();
3642
3643 for (i = 0; i < 16; i++)
3644 if (set) {
3645 get_user(default_red[i], arg++);
3646 get_user(default_grn[i], arg++);
3647 get_user(default_blu[i], arg++);
3648 } else {
3649 put_user(default_red[i], arg++);
3650 put_user(default_grn[i], arg++);
3651 put_user(default_blu[i], arg++);
3652 }
3653 if (set) {
3654 for (i = 0; i < MAX_NR_CONSOLES; i++)
3655 if (vc_cons_allocated(i)) {
3656 for (j = k = 0; j < 16; j++) {
3657 vc_cons[i].d->vc_palette[k++] = default_red[j];
3658 vc_cons[i].d->vc_palette[k++] = default_grn[j];
3659 vc_cons[i].d->vc_palette[k++] = default_blu[j];
3660 }
3661 set_palette(vc_cons[i].d);
3662 }
3663 }
3664 return 0;
3665}
3666
3667/*
3668 * Load palette into the DAC registers. arg points to a colour
3669 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
3670 */
3671
3672int con_set_cmap(unsigned char __user *arg)
3673{
3674 int rc;
3675
3676 acquire_console_sem();
3677 rc = set_get_cmap (arg,1);
3678 release_console_sem();
3679
3680 return rc;
3681}
3682
3683int con_get_cmap(unsigned char __user *arg)
3684{
3685 int rc;
3686
3687 acquire_console_sem();
3688 rc = set_get_cmap (arg,0);
3689 release_console_sem();
3690
3691 return rc;
3692}
3693
3694void reset_palette(struct vc_data *vc)
3695{
3696 int j, k;
3697 for (j=k=0; j<16; j++) {
3698 vc->vc_palette[k++] = default_red[j];
3699 vc->vc_palette[k++] = default_grn[j];
3700 vc->vc_palette[k++] = default_blu[j];
3701 }
3702 set_palette(vc);
3703}
3704
3705/*
3706 * Font switching
3707 *
3708 * Currently we only support fonts up to 32 pixels wide, at a maximum height
3709 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
3710 * depending on width) reserved for each character which is kinda wasty, but
3711 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
3712 * is upto the actual low-level console-driver convert data into its favorite
3713 * format (maybe we should add a `fontoffset' field to the `display'
3714 * structure so we won't have to convert the fontdata all the time.
3715 * /Jes
3716 */
3717
3718#define max_font_size 65536
3719
3720static int con_font_get(struct vc_data *vc, struct console_font_op *op)
3721{
3722 struct console_font font;
3723 int rc = -EINVAL;
3724 int c;
3725
3726 if (vc->vc_mode != KD_TEXT)
3727 return -EINVAL;
3728
3729 if (op->data) {
3730 font.data = kmalloc(max_font_size, GFP_KERNEL);
3731 if (!font.data)
3732 return -ENOMEM;
3733 } else
3734 font.data = NULL;
3735
3736 acquire_console_sem();
3737 if (vc->vc_sw->con_font_get)
3738 rc = vc->vc_sw->con_font_get(vc, &font);
3739 else
3740 rc = -ENOSYS;
3741 release_console_sem();
3742
3743 if (rc)
3744 goto out;
3745
3746 c = (font.width+7)/8 * 32 * font.charcount;
3747
3748 if (op->data && font.charcount > op->charcount)
3749 rc = -ENOSPC;
3750 if (!(op->flags & KD_FONT_FLAG_OLD)) {
3751 if (font.width > op->width || font.height > op->height)
3752 rc = -ENOSPC;
3753 } else {
3754 if (font.width != 8)
3755 rc = -EIO;
3756 else if ((op->height && font.height > op->height) ||
3757 font.height > 32)
3758 rc = -ENOSPC;
3759 }
3760 if (rc)
3761 goto out;
3762
3763 op->height = font.height;
3764 op->width = font.width;
3765 op->charcount = font.charcount;
3766
3767 if (op->data && copy_to_user(op->data, font.data, c))
3768 rc = -EFAULT;
3769
3770out:
3771 kfree(font.data);
3772 return rc;
3773}
3774
3775static int con_font_set(struct vc_data *vc, struct console_font_op *op)
3776{
3777 struct console_font font;
3778 int rc = -EINVAL;
3779 int size;
3780
3781 if (vc->vc_mode != KD_TEXT)
3782 return -EINVAL;
3783 if (!op->data)
3784 return -EINVAL;
3785 if (op->charcount > 512)
3786 return -EINVAL;
3787 if (!op->height) { /* Need to guess font height [compat] */
3788 int h, i;
3789 u8 __user *charmap = op->data;
3790 u8 tmp;
3791
3792 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
3793 so that we can get rid of this soon */
3794 if (!(op->flags & KD_FONT_FLAG_OLD))
3795 return -EINVAL;
3796 for (h = 32; h > 0; h--)
3797 for (i = 0; i < op->charcount; i++) {
3798 if (get_user(tmp, &charmap[32*i+h-1]))
3799 return -EFAULT;
3800 if (tmp)
3801 goto nonzero;
3802 }
3803 return -EINVAL;
3804 nonzero:
3805 op->height = h;
3806 }
3807 if (op->width <= 0 || op->width > 32 || op->height > 32)
3808 return -EINVAL;
3809 size = (op->width+7)/8 * 32 * op->charcount;
3810 if (size > max_font_size)
3811 return -ENOSPC;
3812 font.charcount = op->charcount;
3813 font.height = op->height;
3814 font.width = op->width;
3815 font.data = kmalloc(size, GFP_KERNEL);
3816 if (!font.data)
3817 return -ENOMEM;
3818 if (copy_from_user(font.data, op->data, size)) {
3819 kfree(font.data);
3820 return -EFAULT;
3821 }
3822 acquire_console_sem();
3823 if (vc->vc_sw->con_font_set)
3824 rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
3825 else
3826 rc = -ENOSYS;
3827 release_console_sem();
3828 kfree(font.data);
3829 return rc;
3830}
3831
3832static int con_font_default(struct vc_data *vc, struct console_font_op *op)
3833{
3834 struct console_font font = {.width = op->width, .height = op->height};
3835 char name[MAX_FONT_NAME];
3836 char *s = name;
3837 int rc;
3838
3839 if (vc->vc_mode != KD_TEXT)
3840 return -EINVAL;
3841
3842 if (!op->data)
3843 s = NULL;
3844 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0)
3845 return -EFAULT;
3846 else
3847 name[MAX_FONT_NAME - 1] = 0;
3848
3849 acquire_console_sem();
3850 if (vc->vc_sw->con_font_default)
3851 rc = vc->vc_sw->con_font_default(vc, &font, s);
3852 else
3853 rc = -ENOSYS;
3854 release_console_sem();
3855 if (!rc) {
3856 op->width = font.width;
3857 op->height = font.height;
3858 }
3859 return rc;
3860}
3861
3862static int con_font_copy(struct vc_data *vc, struct console_font_op *op)
3863{
3864 int con = op->height;
3865 int rc;
3866
3867 if (vc->vc_mode != KD_TEXT)
3868 return -EINVAL;
3869
3870 acquire_console_sem();
3871 if (!vc->vc_sw->con_font_copy)
3872 rc = -ENOSYS;
3873 else if (con < 0 || !vc_cons_allocated(con))
3874 rc = -ENOTTY;
3875 else if (con == vc->vc_num) /* nothing to do */
3876 rc = 0;
3877 else
3878 rc = vc->vc_sw->con_font_copy(vc, con);
3879 release_console_sem();
3880 return rc;
3881}
3882
3883int con_font_op(struct vc_data *vc, struct console_font_op *op)
3884{
3885 switch (op->op) {
3886 case KD_FONT_OP_SET:
3887 return con_font_set(vc, op);
3888 case KD_FONT_OP_GET:
3889 return con_font_get(vc, op);
3890 case KD_FONT_OP_SET_DEFAULT:
3891 return con_font_default(vc, op);
3892 case KD_FONT_OP_COPY:
3893 return con_font_copy(vc, op);
3894 }
3895 return -ENOSYS;
3896}
3897
3898/*
3899 * Interface exported to selection and vcs.
3900 */
3901
3902/* used by selection */
3903u16 screen_glyph(struct vc_data *vc, int offset)
3904{
3905 u16 w = scr_readw(screenpos(vc, offset, 1));
3906 u16 c = w & 0xff;
3907
3908 if (w & vc->vc_hi_font_mask)
3909 c |= 0x100;
3910 return c;
3911}
3912
3913/* used by vcs - note the word offset */
3914unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed)
3915{
3916 return screenpos(vc, 2 * w_offset, viewed);
3917}
3918
3919void getconsxy(struct vc_data *vc, unsigned char *p)
3920{
3921 p[0] = vc->vc_x;
3922 p[1] = vc->vc_y;
3923}
3924
3925void putconsxy(struct vc_data *vc, unsigned char *p)
3926{
9477e260 3927 hide_cursor(vc);
1da177e4
LT		 3928 gotoxy(vc, p[0], p[1]);
3929 set_cursor(vc);
3930}
3931
3932u16 vcs_scr_readw(struct vc_data *vc, const u16 *org)
3933{
3934 if ((unsigned long)org == vc->vc_pos && softcursor_original != -1)
3935 return softcursor_original;
3936 return scr_readw(org);
3937}
3938
3939void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org)
3940{
3941 scr_writew(val, org);
3942 if ((unsigned long)org == vc->vc_pos) {
3943 softcursor_original = -1;
3944 add_softcursor(vc);
3945 }
3946}
3947
3948/*
3949 * Visible symbols for modules
3950 */
3951
3952EXPORT_SYMBOL(color_table);
3953EXPORT_SYMBOL(default_red);
3954EXPORT_SYMBOL(default_grn);
3955EXPORT_SYMBOL(default_blu);
3956EXPORT_SYMBOL(update_region);
3957EXPORT_SYMBOL(redraw_screen);
3958EXPORT_SYMBOL(vc_resize);
ca9bda00 3959EXPORT_SYMBOL(vc_lock_resize);
1da177e4
LT		 3960EXPORT_SYMBOL(fg_console);
3961EXPORT_SYMBOL(console_blank_hook);
3962EXPORT_SYMBOL(console_blanked);
3963EXPORT_SYMBOL(vc_cons);
3964#ifndef VT_SINGLE_DRIVER
3965EXPORT_SYMBOL(take_over_console);
3966EXPORT_SYMBOL(give_up_console);
3967#endif
Clone of davem's net-next-2.6 tree