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vt: break a couple of obsolete SCOish codes.
[thirdparty/linux.git] / drivers / tty / vt / vt.c
CommitLineData
1da177e4 1/*
1da177e4
LT		 2 * Copyright (C) 1991, 1992 Linus Torvalds
3 */
4
5/*
6 * Hopefully this will be a rather complete VT102 implementation.
7 *
8 * Beeping thanks to John T Kohl.
9 *
10 * Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics
11 * Chars, and VT100 enhancements by Peter MacDonald.
12 *
13 * Copy and paste function by Andrew Haylett,
14 * some enhancements by Alessandro Rubini.
15 *
16 * Code to check for different video-cards mostly by Galen Hunt,
17 * <g-hunt@ee.utah.edu>
18 *
19 * Rudimentary ISO 10646/Unicode/UTF-8 character set support by
20 * Markus Kuhn, <mskuhn@immd4.informatik.uni-erlangen.de>.
21 *
22 * Dynamic allocation of consoles, aeb@cwi.nl, May 1994
23 * Resizing of consoles, aeb, 940926
24 *
25 * Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94
26 * <poe@daimi.aau.dk>
27 *
28 * User-defined bell sound, new setterm control sequences and printk
29 * redirection by Martin Mares <mj@k332.feld.cvut.cz> 19-Nov-95
30 *
31 * APM screenblank bug fixed Takashi Manabe <manabe@roy.dsl.tutics.tut.jp>
32 *
33 * Merge with the abstract console driver by Geert Uytterhoeven
34 * <geert@linux-m68k.org>, Jan 1997.
35 *
36 * Original m68k console driver modifications by
37 *
38 * - Arno Griffioen <arno@usn.nl>
39 * - David Carter <carter@cs.bris.ac.uk>
40 *
41 * The abstract console driver provides a generic interface for a text
42 * console. It supports VGA text mode, frame buffer based graphical consoles
43 * and special graphics processors that are only accessible through some
44 * registers (e.g. a TMS340x0 GSP).
45 *
46 * The interface to the hardware is specified using a special structure
47 * (struct consw) which contains function pointers to console operations
48 * (see <linux/console.h> for more information).
49 *
50 * Support for changeable cursor shape
51 * by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997
52 *
53 * Ported to i386 and con_scrolldelta fixed
54 * by Emmanuel Marty <core@ggi-project.org>, April 1998
55 *
56 * Resurrected character buffers in videoram plus lots of other trickery
57 * by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998
58 *
59 * Removed old-style timers, introduced console_timer, made timer
e1f8e874 60 * deletion SMP-safe. 17Jun00, Andrew Morton
1da177e4
LT		 61 *
62 * Removed console_lock, enabled interrupts across all console operations
63 * 13 March 2001, Andrew Morton
d4328b40
AT		 64 *
65 * Fixed UTF-8 mode so alternate charset modes always work according
66 * to control sequences interpreted in do_con_trol function
67 * preserving backward VT100 semigraphics compatibility,
68 * malformed UTF sequences represented as sequences of replacement glyphs,
69 * original codes or '?' as a last resort if replacement glyph is undefined
70 * by Adam Tla/lka <atlka@pg.gda.pl>, Aug 2006
1da177e4
LT		 71 */
72
73#include <linux/module.h>
74#include <linux/types.h>
75#include <linux/sched.h>
76#include <linux/tty.h>
77#include <linux/tty_flip.h>
78#include <linux/kernel.h>
79#include <linux/string.h>
80#include <linux/errno.h>
81#include <linux/kd.h>
82#include <linux/slab.h>
83#include <linux/major.h>
84#include <linux/mm.h>
85#include <linux/console.h>
86#include <linux/init.h>
c831c338 87#include <linux/mutex.h>
1da177e4
LT		 88#include <linux/vt_kern.h>
89#include <linux/selection.h>
90#include <linux/tiocl.h>
91#include <linux/kbd_kern.h>
92#include <linux/consolemap.h>
93#include <linux/timer.h>
94#include <linux/interrupt.h>
1da177e4 95#include <linux/workqueue.h>
1da177e4
LT		 96#include <linux/pm.h>
97#include <linux/font.h>
98#include <linux/bitops.h>
b293d758 99#include <linux/notifier.h>
d81ed103
AC		 100#include <linux/device.h>
101#include <linux/io.h>
d81ed103 102#include <linux/uaccess.h>
81d44507 103#include <linux/kdb.h>
74c807ce 104#include <linux/ctype.h>
1da177e4 105
3e795de7 106#define MAX_NR_CON_DRIVER 16
1da177e4 107
6db4063c 108#define CON_DRIVER_FLAG_MODULE 1
928e964f
AD		 109#define CON_DRIVER_FLAG_INIT 2
110#define CON_DRIVER_FLAG_ATTR 4
3e795de7
AD		 111
112struct con_driver {
113 const struct consw *con;
114 const char *desc;
805952a8 115 struct device *dev;
6db4063c 116 int node;
3e795de7
AD		 117 int first;
118 int last;
119 int flag;
120};
121
122static struct con_driver registered_con_driver[MAX_NR_CON_DRIVER];
1da177e4
LT		 123const struct consw *conswitchp;
124
125/* A bitmap for codes <32. A bit of 1 indicates that the code
126 * corresponding to that bit number invokes some special action
127 * (such as cursor movement) and should not be displayed as a
128 * glyph unless the disp_ctrl mode is explicitly enabled.
129 */
130#define CTRL_ACTION 0x0d00ff81
131#define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */
132
133/*
134 * Here is the default bell parameters: 750HZ, 1/8th of a second
135 */
136#define DEFAULT_BELL_PITCH 750
137#define DEFAULT_BELL_DURATION (HZ/8)
138
1da177e4
LT		 139struct vc vc_cons [MAX_NR_CONSOLES];
140
141#ifndef VT_SINGLE_DRIVER
142static const struct consw *con_driver_map[MAX_NR_CONSOLES];
143#endif
144
145static int con_open(struct tty_struct *, struct file *);
146static void vc_init(struct vc_data *vc, unsigned int rows,
147 unsigned int cols, int do_clear);
148static void gotoxy(struct vc_data *vc, int new_x, int new_y);
149static void save_cur(struct vc_data *vc);
150static void reset_terminal(struct vc_data *vc, int do_clear);
151static void con_flush_chars(struct tty_struct *tty);
403aac96 152static int set_vesa_blanking(char __user *p);
1da177e4
LT		 153static void set_cursor(struct vc_data *vc);
154static void hide_cursor(struct vc_data *vc);
65f27f38 155static void console_callback(struct work_struct *ignored);
1da177e4
LT		 156static void blank_screen_t(unsigned long dummy);
157static void set_palette(struct vc_data *vc);
158
159static int printable; /* Is console ready for printing? */
77bf2bab 160int default_utf8 = true;
042f10ec 161module_param(default_utf8, int, S_IRUGO | S_IWUSR);
f6c06b68
MG		 162int global_cursor_default = -1;
163module_param(global_cursor_default, int, S_IRUGO | S_IWUSR);
1da177e4 164
9ea9a886
CL		 165static int cur_default = CUR_DEFAULT;
166module_param(cur_default, int, S_IRUGO | S_IWUSR);
167
1da177e4
LT		 168/*
169 * ignore_poke: don't unblank the screen when things are typed. This is
170 * mainly for the privacy of braille terminal users.
171 */
172static int ignore_poke;
173
174int do_poke_blanked_console;
175int console_blanked;
176
177static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
1da177e4 178static int vesa_off_interval;
f324edc8
DM		 179static int blankinterval = 10*60;
180core_param(consoleblank, blankinterval, int, 0444);
1da177e4 181
65f27f38 182static DECLARE_WORK(console_work, console_callback);
1da177e4
LT		 183
184/*
185 * fg_console is the current virtual console,
186 * last_console is the last used one,
187 * want_console is the console we want to switch to,
b45cfba4 188 * saved_* variants are for save/restore around kernel debugger enter/leave
1da177e4
LT		 189 */
190int fg_console;
191int last_console;
192int want_console = -1;
fed891c8
JW		 193static int saved_fg_console;
194static int saved_last_console;
195static int saved_want_console;
196static int saved_vc_mode;
beed5336 197static int saved_console_blanked;
1da177e4
LT		 198
199/*
200 * For each existing display, we have a pointer to console currently visible
201 * on that display, allowing consoles other than fg_console to be refreshed
202 * appropriately. Unless the low-level driver supplies its own display_fg
203 * variable, we use this one for the "master display".
204 */
205static struct vc_data *master_display_fg;
206
207/*
208 * Unfortunately, we need to delay tty echo when we're currently writing to the
209 * console since the code is (and always was) not re-entrant, so we schedule
210 * all flip requests to process context with schedule-task() and run it from
211 * console_callback().
212 */
213
214/*
215 * For the same reason, we defer scrollback to the console callback.
216 */
217static int scrollback_delta;
218
219/*
220 * Hook so that the power management routines can (un)blank
221 * the console on our behalf.
222 */
223int (*console_blank_hook)(int);
224
40565f19 225static DEFINE_TIMER(console_timer, blank_screen_t, 0, 0);
1da177e4
LT		 226static int blank_state;
227static int blank_timer_expired;
228enum {
229 blank_off = 0,
230 blank_normal_wait,
231 blank_vesa_wait,
232};
233
fbc92a34
KS		 234/*
235 * /sys/class/tty/tty0/
236 *
237 * the attribute 'active' contains the name of the current vc
238 * console and it supports poll() to detect vc switches
239 */
240static struct device *tty0dev;
241
b293d758
ST		 242/*
243 * Notifier list for console events.
244 */
245static ATOMIC_NOTIFIER_HEAD(vt_notifier_list);
246
247int register_vt_notifier(struct notifier_block *nb)
248{
249 return atomic_notifier_chain_register(&vt_notifier_list, nb);
250}
251EXPORT_SYMBOL_GPL(register_vt_notifier);
252
253int unregister_vt_notifier(struct notifier_block *nb)
254{
255 return atomic_notifier_chain_unregister(&vt_notifier_list, nb);
256}
257EXPORT_SYMBOL_GPL(unregister_vt_notifier);
258
259static void notify_write(struct vc_data *vc, unsigned int unicode)
260{
502fcb79 261 struct vt_notifier_param param = { .vc = vc, .c = unicode };
b293d758
ST		 262 atomic_notifier_call_chain(&vt_notifier_list, VT_WRITE, &param);
263}
264
265static void notify_update(struct vc_data *vc)
266{
267 struct vt_notifier_param param = { .vc = vc };
268 atomic_notifier_call_chain(&vt_notifier_list, VT_UPDATE, &param);
269}
1da177e4
LT		 270/*
271 * Low-Level Functions
272 */
273
274#define IS_FG(vc) ((vc)->vc_num == fg_console)
275
276#ifdef VT_BUF_VRAM_ONLY
277#define DO_UPDATE(vc) 0
278#else
f700d6e5 279#define DO_UPDATE(vc) (CON_IS_VISIBLE(vc) && !console_blanked)
1da177e4
LT		 280#endif
281
282static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed)
283{
284 unsigned short *p;
285
286 if (!viewed)
287 p = (unsigned short *)(vc->vc_origin + offset);
288 else if (!vc->vc_sw->con_screen_pos)
289 p = (unsigned short *)(vc->vc_visible_origin + offset);
290 else
291 p = vc->vc_sw->con_screen_pos(vc, offset);
292 return p;
293}
294
e33ac1c1 295/* Called from the keyboard irq path.. */
1da177e4
LT		 296static inline void scrolldelta(int lines)
297{
e33ac1c1
AC		 298 /* FIXME */
299 /* scrolldelta needs some kind of consistency lock, but the BKL was
300 and still is not protecting versus the scheduled back end */
1da177e4
LT		 301 scrollback_delta += lines;
302 schedule_console_callback();
303}
304
305void schedule_console_callback(void)
306{
307 schedule_work(&console_work);
308}
309
310static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
311{
312 unsigned short *d, *s;
313
314 if (t+nr >= b)
315 nr = b - t - 1;
316 if (b > vc->vc_rows || t >= b || nr < 1)
317 return;
318 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr))
319 return;
320 d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
321 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr));
322 scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row);
386f40c8 323 scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_video_erase_char,
1da177e4
LT		 324 vc->vc_size_row * nr);
325}
326
327static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
328{
329 unsigned short *s;
330 unsigned int step;
331
332 if (t+nr >= b)
333 nr = b - t - 1;
334 if (b > vc->vc_rows || t >= b || nr < 1)
335 return;
336 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr))
337 return;
338 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
339 step = vc->vc_cols * nr;
340 scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row);
93f78da4 341 scr_memsetw(s, vc->vc_video_erase_char, 2 * step);
1da177e4
LT		 342}
343
344static void do_update_region(struct vc_data *vc, unsigned long start, int count)
345{
346#ifndef VT_BUF_VRAM_ONLY
347 unsigned int xx, yy, offset;
348 u16 *p;
349
350 p = (u16 *) start;
351 if (!vc->vc_sw->con_getxy) {
352 offset = (start - vc->vc_origin) / 2;
353 xx = offset % vc->vc_cols;
354 yy = offset / vc->vc_cols;
355 } else {
356 int nxx, nyy;
357 start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy);
358 xx = nxx; yy = nyy;
359 }
360 for(;;) {
361 u16 attrib = scr_readw(p) & 0xff00;
362 int startx = xx;
363 u16 *q = p;
364 while (xx < vc->vc_cols && count) {
365 if (attrib != (scr_readw(p) & 0xff00)) {
366 if (p > q)
367 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
368 startx = xx;
369 q = p;
370 attrib = scr_readw(p) & 0xff00;
371 }
372 p++;
373 xx++;
374 count--;
375 }
376 if (p > q)
377 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
378 if (!count)
379 break;
380 xx = 0;
381 yy++;
382 if (vc->vc_sw->con_getxy) {
383 p = (u16 *)start;
384 start = vc->vc_sw->con_getxy(vc, start, NULL, NULL);
385 }
386 }
387#endif
388}
389
390void update_region(struct vc_data *vc, unsigned long start, int count)
391{
392 WARN_CONSOLE_UNLOCKED();
393
394 if (DO_UPDATE(vc)) {
395 hide_cursor(vc);
396 do_update_region(vc, start, count);
397 set_cursor(vc);
398 }
399}
400
401/* Structure of attributes is hardware-dependent */
402
fa6ce9ab
JE		 403static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink,
404 u8 _underline, u8 _reverse, u8 _italic)
1da177e4
LT		 405{
406 if (vc->vc_sw->con_build_attr)
fa6ce9ab
JE		 407 return vc->vc_sw->con_build_attr(vc, _color, _intensity,
408 _blink, _underline, _reverse, _italic);
1da177e4
LT		 409
410#ifndef VT_BUF_VRAM_ONLY
411/*
412 * ++roman: I completely changed the attribute format for monochrome
413 * mode (!can_do_color). The formerly used MDA (monochrome display
414 * adapter) format didn't allow the combination of certain effects.
415 * Now the attribute is just a bit vector:
416 * Bit 0..1: intensity (0..2)
417 * Bit 2 : underline
418 * Bit 3 : reverse
419 * Bit 7 : blink
420 */
421 {
c9e587ab 422 u8 a = _color;
1da177e4
LT		 423 if (!vc->vc_can_do_color)
424 return _intensity |
fa6ce9ab 425 (_italic ? 2 : 0) |
1da177e4
LT		 426 (_underline ? 4 : 0) |
427 (_reverse ? 8 : 0) |
428 (_blink ? 0x80 : 0);
fa6ce9ab
JE		 429 if (_italic)
430 a = (a & 0xF0) | vc->vc_itcolor;
431 else if (_underline)
1da177e4
LT		 432 a = (a & 0xf0) | vc->vc_ulcolor;
433 else if (_intensity == 0)
434 a = (a & 0xf0) | vc->vc_ulcolor;
435 if (_reverse)
436 a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77);
437 if (_blink)
438 a ^= 0x80;
439 if (_intensity == 2)
440 a ^= 0x08;
441 if (vc->vc_hi_font_mask == 0x100)
442 a <<= 1;
443 return a;
444 }
445#else
446 return 0;
447#endif
448}
449
450static void update_attr(struct vc_data *vc)
451{
fa6ce9ab
JE		 452 vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity,
453 vc->vc_blink, vc->vc_underline,
454 vc->vc_reverse ^ vc->vc_decscnm, vc->vc_italic);
455 vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm, 0) << 8) | ' ';
1da177e4
LT		 456}
457
458/* Note: inverting the screen twice should revert to the original state */
459void invert_screen(struct vc_data *vc, int offset, int count, int viewed)
460{
461 unsigned short *p;
462
463 WARN_CONSOLE_UNLOCKED();
464
465 count /= 2;
466 p = screenpos(vc, offset, viewed);
467 if (vc->vc_sw->con_invert_region)
468 vc->vc_sw->con_invert_region(vc, p, count);
469#ifndef VT_BUF_VRAM_ONLY
470 else {
471 u16 *q = p;
472 int cnt = count;
473 u16 a;
474
475 if (!vc->vc_can_do_color) {
476 while (cnt--) {
477 a = scr_readw(q);
478 a ^= 0x0800;
479 scr_writew(a, q);
480 q++;
481 }
482 } else if (vc->vc_hi_font_mask == 0x100) {
483 while (cnt--) {
484 a = scr_readw(q);
485 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4);
486 scr_writew(a, q);
487 q++;
488 }
489 } else {
490 while (cnt--) {
491 a = scr_readw(q);
492 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4);
493 scr_writew(a, q);
494 q++;
495 }
496 }
497 }
498#endif
499 if (DO_UPDATE(vc))
500 do_update_region(vc, (unsigned long) p, count);
501}
502
503/* used by selection: complement pointer position */
504void complement_pos(struct vc_data *vc, int offset)
505{
414edcd3 506 static int old_offset = -1;
1da177e4
LT		 507 static unsigned short old;
508 static unsigned short oldx, oldy;
509
510 WARN_CONSOLE_UNLOCKED();
511
414edcd3
AD		 512 if (old_offset != -1 && old_offset >= 0 &&
513 old_offset < vc->vc_screenbuf_size) {
514 scr_writew(old, screenpos(vc, old_offset, 1));
1da177e4
LT		 515 if (DO_UPDATE(vc))
516 vc->vc_sw->con_putc(vc, old, oldy, oldx);
517 }
414edcd3
AD		 518
519 old_offset = offset;
520
521 if (offset != -1 && offset >= 0 &&
522 offset < vc->vc_screenbuf_size) {
1da177e4 523 unsigned short new;
414edcd3 524 unsigned short *p;
1da177e4
LT		 525 p = screenpos(vc, offset, 1);
526 old = scr_readw(p);
527 new = old ^ vc->vc_complement_mask;
528 scr_writew(new, p);
529 if (DO_UPDATE(vc)) {
530 oldx = (offset >> 1) % vc->vc_cols;
531 oldy = (offset >> 1) / vc->vc_cols;
532 vc->vc_sw->con_putc(vc, new, oldy, oldx);
533 }
534 }
414edcd3 535
1da177e4
LT		 536}
537
538static void insert_char(struct vc_data *vc, unsigned int nr)
539{
81732c3b 540 unsigned short *p = (unsigned short *) vc->vc_pos;
1da177e4 541
a883b70d 542 scr_memmovew(p + nr, p, (vc->vc_cols - vc->vc_x - nr) * 2);
81732c3b 543 scr_memsetw(p, vc->vc_video_erase_char, nr * 2);
1da177e4 544 vc->vc_need_wrap = 0;
81732c3b
JFM		 545 if (DO_UPDATE(vc))
546 do_update_region(vc, (unsigned long) p,
b1a925f4 547 vc->vc_cols - vc->vc_x);
1da177e4
LT		 548}
549
550static void delete_char(struct vc_data *vc, unsigned int nr)
551{
81732c3b 552 unsigned short *p = (unsigned short *) vc->vc_pos;
1da177e4 553
b1a925f4 554 scr_memcpyw(p, p + nr, (vc->vc_cols - vc->vc_x - nr) * 2);
81732c3b
JFM		 555 scr_memsetw(p + vc->vc_cols - vc->vc_x - nr, vc->vc_video_erase_char,
556 nr * 2);
1da177e4 557 vc->vc_need_wrap = 0;
81732c3b
JFM		 558 if (DO_UPDATE(vc))
559 do_update_region(vc, (unsigned long) p,
b1a925f4 560 vc->vc_cols - vc->vc_x);
1da177e4
LT		 561}
562
563static int softcursor_original;
564
565static void add_softcursor(struct vc_data *vc)
566{
567 int i = scr_readw((u16 *) vc->vc_pos);
568 u32 type = vc->vc_cursor_type;
569
570 if (! (type & 0x10)) return;
571 if (softcursor_original != -1) return;
572 softcursor_original = i;
573 i |= ((type >> 8) & 0xff00 );
574 i ^= ((type) & 0xff00 );
575 if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000;
576 if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700;
577 scr_writew(i, (u16 *) vc->vc_pos);
578 if (DO_UPDATE(vc))
579 vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x);
580}
581
582static void hide_softcursor(struct vc_data *vc)
583{
584 if (softcursor_original != -1) {
585 scr_writew(softcursor_original, (u16 *)vc->vc_pos);
586 if (DO_UPDATE(vc))
587 vc->vc_sw->con_putc(vc, softcursor_original,
588 vc->vc_y, vc->vc_x);
589 softcursor_original = -1;
590 }
591}
592
593static void hide_cursor(struct vc_data *vc)
594{
595 if (vc == sel_cons)
596 clear_selection();
597 vc->vc_sw->con_cursor(vc, CM_ERASE);
598 hide_softcursor(vc);
599}
600
601static void set_cursor(struct vc_data *vc)
602{
603 if (!IS_FG(vc) || console_blanked ||
604 vc->vc_mode == KD_GRAPHICS)
605 return;
606 if (vc->vc_deccm) {
607 if (vc == sel_cons)
608 clear_selection();
609 add_softcursor(vc);
610 if ((vc->vc_cursor_type & 0x0f) != 1)
611 vc->vc_sw->con_cursor(vc, CM_DRAW);
612 } else
613 hide_cursor(vc);
614}
615
616static void set_origin(struct vc_data *vc)
617{
618 WARN_CONSOLE_UNLOCKED();
619
620 if (!CON_IS_VISIBLE(vc) ||
621 !vc->vc_sw->con_set_origin ||
622 !vc->vc_sw->con_set_origin(vc))
623 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
624 vc->vc_visible_origin = vc->vc_origin;
625 vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size;
626 vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x;
627}
628
629static inline void save_screen(struct vc_data *vc)
630{
631 WARN_CONSOLE_UNLOCKED();
632
633 if (vc->vc_sw->con_save_screen)
634 vc->vc_sw->con_save_screen(vc);
635}
636
637/*
638 * Redrawing of screen
639 */
640
2a248307 641void clear_buffer_attributes(struct vc_data *vc)
1da177e4
LT		 642{
643 unsigned short *p = (unsigned short *)vc->vc_origin;
644 int count = vc->vc_screenbuf_size / 2;
645 int mask = vc->vc_hi_font_mask | 0xff;
646
647 for (; count > 0; count--, p++) {
648 scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p);
649 }
650}
651
652void redraw_screen(struct vc_data *vc, int is_switch)
653{
654 int redraw = 0;
655
656 WARN_CONSOLE_UNLOCKED();
657
658 if (!vc) {
659 /* strange ... */
660 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
661 return;
662 }
663
664 if (is_switch) {
665 struct vc_data *old_vc = vc_cons[fg_console].d;
666 if (old_vc == vc)
667 return;
668 if (!CON_IS_VISIBLE(vc))
669 redraw = 1;
670 *vc->vc_display_fg = vc;
671 fg_console = vc->vc_num;
672 hide_cursor(old_vc);
673 if (!CON_IS_VISIBLE(old_vc)) {
674 save_screen(old_vc);
675 set_origin(old_vc);
676 }
fbc92a34
KS		 677 if (tty0dev)
678 sysfs_notify(&tty0dev->kobj, NULL, "active");
1da177e4
LT		 679 } else {
680 hide_cursor(vc);
681 redraw = 1;
682 }
683
684 if (redraw) {
685 int update;
686 int old_was_color = vc->vc_can_do_color;
687
688 set_origin(vc);
689 update = vc->vc_sw->con_switch(vc);
690 set_palette(vc);
691 /*
692 * If console changed from mono<->color, the best we can do
693 * is to clear the buffer attributes. As it currently stands,
694 * rebuilding new attributes from the old buffer is not doable
695 * without overly complex code.
696 */
697 if (old_was_color != vc->vc_can_do_color) {
698 update_attr(vc);
699 clear_buffer_attributes(vc);
700 }
8fd4bd22
JB		 701
702 /* Forcibly update if we're panicing */
703 if ((update && vc->vc_mode != KD_GRAPHICS) ||
704 vt_force_oops_output(vc))
1da177e4
LT		 705 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
706 }
707 set_cursor(vc);
708 if (is_switch) {
709 set_leds();
710 compute_shiftstate();
8182ec49 711 notify_update(vc);
1da177e4
LT		 712 }
713}
714
715/*
716 * Allocation, freeing and resizing of VTs.
717 */
718
719int vc_cons_allocated(unsigned int i)
720{
721 return (i < MAX_NR_CONSOLES && vc_cons[i].d);
722}
723
724static void visual_init(struct vc_data *vc, int num, int init)
725{
726 /* ++Geert: vc->vc_sw->con_init determines console size */
727 if (vc->vc_sw)
728 module_put(vc->vc_sw->owner);
729 vc->vc_sw = conswitchp;
730#ifndef VT_SINGLE_DRIVER
731 if (con_driver_map[num])
732 vc->vc_sw = con_driver_map[num];
733#endif
734 __module_get(vc->vc_sw->owner);
735 vc->vc_num = num;
736 vc->vc_display_fg = &master_display_fg;
737 vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir;
738 vc->vc_uni_pagedir = 0;
739 vc->vc_hi_font_mask = 0;
740 vc->vc_complement_mask = 0;
741 vc->vc_can_do_color = 0;
8fd4bd22 742 vc->vc_panic_force_write = false;
1da177e4
LT		 743 vc->vc_sw->con_init(vc, init);
744 if (!vc->vc_complement_mask)
745 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
746 vc->vc_s_complement_mask = vc->vc_complement_mask;
747 vc->vc_size_row = vc->vc_cols << 1;
748 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
749}
750
751int vc_allocate(unsigned int currcons) /* return 0 on success */
752{
753 WARN_CONSOLE_UNLOCKED();
754
755 if (currcons >= MAX_NR_CONSOLES)
756 return -ENXIO;
757 if (!vc_cons[currcons].d) {
758 struct vc_data *vc;
b293d758 759 struct vt_notifier_param param;
1da177e4
LT		 760
761 /* prevent users from taking too much memory */
762 if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE))
763 return -EPERM;
764
765 /* due to the granularity of kmalloc, we waste some memory here */
766 /* the alloc is done in two steps, to optimize the common situation
767 of a 25x80 console (structsize=216, screenbuf_size=4000) */
768 /* although the numbers above are not valid since long ago, the
769 point is still up-to-date and the comment still has its value
770 even if only as a historical artifact. --mj, July 1998 */
b293d758 771 param.vc = vc = kzalloc(sizeof(struct vc_data), GFP_KERNEL);
1da177e4
LT		 772 if (!vc)
773 return -ENOMEM;
1da177e4 774 vc_cons[currcons].d = vc;
ff917ba4 775 tty_port_init(&vc->port);
c2c88f10 776 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
1da177e4
LT		 777 visual_init(vc, currcons, 1);
778 if (!*vc->vc_uni_pagedir_loc)
779 con_set_default_unimap(vc);
5c9228f0 780 vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL);
1da177e4
LT		 781 if (!vc->vc_screenbuf) {
782 kfree(vc);
783 vc_cons[currcons].d = NULL;
784 return -ENOMEM;
785 }
f6c06b68
MG		 786
787 /* If no drivers have overridden us and the user didn't pass a
788 boot option, default to displaying the cursor */
789 if (global_cursor_default == -1)
790 global_cursor_default = 1;
791
1da177e4 792 vc_init(vc, vc->vc_rows, vc->vc_cols, 1);
4995f8ef 793 vcs_make_sysfs(currcons);
b293d758 794 atomic_notifier_call_chain(&vt_notifier_list, VT_ALLOCATE, &param);
1da177e4
LT		 795 }
796 return 0;
797}
798
e400b6ec
AD		 799static inline int resize_screen(struct vc_data *vc, int width, int height,
800 int user)
1da177e4
LT		 801{
802 /* Resizes the resolution of the display adapater */
803 int err = 0;
804
805 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize)
e400b6ec
AD		 806 err = vc->vc_sw->con_resize(vc, width, height, user);
807
1da177e4
LT		 808 return err;
809}
810
811/*
812 * Change # of rows and columns (0 means unchanged/the size of fg_console)
813 * [this is to be used together with some user program
814 * like resize that changes the hardware videomode]
815 */
816#define VC_RESIZE_MAXCOL (32767)
817#define VC_RESIZE_MAXROW (32767)
8c9a9dd0
AC		 818
819/**
820 * vc_do_resize - resizing method for the tty
821 * @tty: tty being resized
822 * @real_tty: real tty (different to tty if a pty/tty pair)
823 * @vc: virtual console private data
824 * @cols: columns
825 * @lines: lines
826 *
827 * Resize a virtual console, clipping according to the actual constraints.
828 * If the caller passes a tty structure then update the termios winsize
3ad2f3fb 829 * information and perform any necessary signal handling.
8c9a9dd0 830 *
6a1c0680 831 * Caller must hold the console semaphore. Takes the termios rwsem and
8c9a9dd0
AC		 832 * ctrl_lock of the tty IFF a tty is passed.
833 */
834
fc6f6238
AC		 835static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc,
836 unsigned int cols, unsigned int lines)
1da177e4
LT		 837{
838 unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0;
9e0ba741 839 unsigned long end;
f2ee4ae8 840 unsigned int old_rows, old_row_size;
1da177e4 841 unsigned int new_cols, new_rows, new_row_size, new_screen_size;
9e0ba741 842 unsigned int user;
1da177e4
LT		 843 unsigned short *newscreen;
844
845 WARN_CONSOLE_UNLOCKED();
846
847 if (!vc)
848 return -ENXIO;
849
e400b6ec
AD		 850 user = vc->vc_resize_user;
851 vc->vc_resize_user = 0;
852
1da177e4
LT		 853 if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW)
854 return -EINVAL;
855
856 new_cols = (cols ? cols : vc->vc_cols);
857 new_rows = (lines ? lines : vc->vc_rows);
858 new_row_size = new_cols << 1;
859 new_screen_size = new_row_size * new_rows;
860
861 if (new_cols == vc->vc_cols && new_rows == vc->vc_rows)
862 return 0;
863
5cbded58 864 newscreen = kmalloc(new_screen_size, GFP_USER);
1da177e4
LT		 865 if (!newscreen)
866 return -ENOMEM;
867
868 old_rows = vc->vc_rows;
1da177e4 869 old_row_size = vc->vc_size_row;
1da177e4 870
e400b6ec 871 err = resize_screen(vc, new_cols, new_rows, user);
1da177e4
LT		 872 if (err) {
873 kfree(newscreen);
874 return err;
875 }
876
877 vc->vc_rows = new_rows;
878 vc->vc_cols = new_cols;
879 vc->vc_size_row = new_row_size;
880 vc->vc_screenbuf_size = new_screen_size;
881
882 rlth = min(old_row_size, new_row_size);
883 rrem = new_row_size - rlth;
884 old_origin = vc->vc_origin;
885 new_origin = (long) newscreen;
886 new_scr_end = new_origin + new_screen_size;
3b41dc1a
AD		 887
888 if (vc->vc_y > new_rows) {
889 if (old_rows - vc->vc_y < new_rows) {
890 /*
891 * Cursor near the bottom, copy contents from the
892 * bottom of buffer
893 */
894 old_origin += (old_rows - new_rows) * old_row_size;
3b41dc1a
AD		 895 } else {
896 /*
897 * Cursor is in no man's land, copy 1/2 screenful
898 * from the top and bottom of cursor position
899 */
900 old_origin += (vc->vc_y - new_rows/2) * old_row_size;
3b41dc1a 901 }
9fc2b2d0
FJ		 902 }
903
904 end = old_origin + old_row_size * min(old_rows, new_rows);
1da177e4
LT		 905
906 update_attr(vc);
907
3b41dc1a
AD		 908 while (old_origin < end) {
909 scr_memcpyw((unsigned short *) new_origin,
910 (unsigned short *) old_origin, rlth);
1da177e4 911 if (rrem)
3b41dc1a
AD		 912 scr_memsetw((void *)(new_origin + rlth),
913 vc->vc_video_erase_char, rrem);
1da177e4
LT		 914 old_origin += old_row_size;
915 new_origin += new_row_size;
916 }
917 if (new_scr_end > new_origin)
3b41dc1a
AD		 918 scr_memsetw((void *)new_origin, vc->vc_video_erase_char,
919 new_scr_end - new_origin);
5c9228f0 920 kfree(vc->vc_screenbuf);
1da177e4 921 vc->vc_screenbuf = newscreen;
1da177e4
LT		 922 vc->vc_screenbuf_size = new_screen_size;
923 set_origin(vc);
924
925 /* do part of a reset_terminal() */
926 vc->vc_top = 0;
927 vc->vc_bottom = vc->vc_rows;
928 gotoxy(vc, vc->vc_x, vc->vc_y);
929 save_cur(vc);
930
8c9a9dd0
AC		 931 if (tty) {
932 /* Rewrite the requested winsize data with the actual
933 resulting sizes */
934 struct winsize ws;
1da177e4
LT		 935 memset(&ws, 0, sizeof(ws));
936 ws.ws_row = vc->vc_rows;
937 ws.ws_col = vc->vc_cols;
938 ws.ws_ypixel = vc->vc_scan_lines;
fc6f6238 939 tty_do_resize(tty, &ws);
1da177e4
LT		 940 }
941
942 if (CON_IS_VISIBLE(vc))
943 update_screen(vc);
8b92e87d 944 vt_event_post(VT_EVENT_RESIZE, vc->vc_num, vc->vc_num);
1da177e4
LT		 945 return err;
946}
947
8c9a9dd0
AC		 948/**
949 * vc_resize - resize a VT
950 * @vc: virtual console
951 * @cols: columns
952 * @rows: rows
953 *
954 * Resize a virtual console as seen from the console end of things. We
955 * use the common vc_do_resize methods to update the structures. The
956 * caller must hold the console sem to protect console internals and
8ce73264 957 * vc->port.tty
8c9a9dd0
AC		 958 */
959
960int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int rows)
961{
8ce73264 962 return vc_do_resize(vc->port.tty, vc, cols, rows);
8c9a9dd0
AC		 963}
964
965/**
966 * vt_resize - resize a VT
967 * @tty: tty to resize
8c9a9dd0
AC		 968 * @ws: winsize attributes
969 *
970 * Resize a virtual terminal. This is called by the tty layer as we
971 * register our own handler for resizing. The mutual helper does all
972 * the actual work.
973 *
974 * Takes the console sem and the called methods then take the tty
6a1c0680 975 * termios_rwsem and the tty ctrl_lock in that order.
8c9a9dd0 976 */
da2bdf9a 977static int vt_resize(struct tty_struct *tty, struct winsize *ws)
ca9bda00 978{
8c9a9dd0
AC		 979 struct vc_data *vc = tty->driver_data;
980 int ret;
ca9bda00 981
ac751efa 982 console_lock();
fc6f6238 983 ret = vc_do_resize(tty, vc, ws->ws_col, ws->ws_row);
ac751efa 984 console_unlock();
8c9a9dd0 985 return ret;
ca9bda00 986}
1da177e4 987
421b40a6 988struct vc_data *vc_deallocate(unsigned int currcons)
1da177e4 989{
421b40a6
PH		 990 struct vc_data *vc = NULL;
991
1da177e4
LT		 992 WARN_CONSOLE_UNLOCKED();
993
994 if (vc_cons_allocated(currcons)) {
421b40a6 995 struct vt_notifier_param param;
4995f8ef 996
421b40a6 997 param.vc = vc = vc_cons[currcons].d;
b293d758 998 atomic_notifier_call_chain(&vt_notifier_list, VT_DEALLOCATE, &param);
4995f8ef 999 vcs_remove_sysfs(currcons);
1da177e4 1000 vc->vc_sw->con_deinit(vc);
bde0d2c9 1001 put_pid(vc->vt_pid);
d459ec0b 1002 module_put(vc->vc_sw->owner);
5c9228f0 1003 kfree(vc->vc_screenbuf);
1da177e4
LT		 1004 vc_cons[currcons].d = NULL;
1005 }
421b40a6 1006 return vc;
1da177e4
LT		 1007}
1008
1009/*
1010 * VT102 emulator
1011 */
1012
079c9534
AC		 1013#define set_kbd(vc, x) vt_set_kbd_mode_bit((vc)->vc_num, (x))
1014#define clr_kbd(vc, x) vt_clr_kbd_mode_bit((vc)->vc_num, (x))
1015#define is_kbd(vc, x) vt_get_kbd_mode_bit((vc)->vc_num, (x))
1da177e4
LT		 1016
1017#define decarm VC_REPEAT
1018#define decckm VC_CKMODE
1019#define kbdapplic VC_APPLIC
1020#define lnm VC_CRLF
1021
1022/*
1023 * this is what the terminal answers to a ESC-Z or csi0c query.
1024 */
1025#define VT100ID "\033[?1;2c"
1026#define VT102ID "\033[?6c"
1027
1028unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7,
1029 8,12,10,14, 9,13,11,15 };
1030
1031/* the default colour table, for VGA+ colour systems */
1032int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
1033 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
1034int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
1035 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
1036int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
1037 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
1038
1c2bbe6a
JE		 1039module_param_array(default_red, int, NULL, S_IRUGO | S_IWUSR);
1040module_param_array(default_grn, int, NULL, S_IRUGO | S_IWUSR);
1041module_param_array(default_blu, int, NULL, S_IRUGO | S_IWUSR);
1042
1da177e4
LT		 1043/*
1044 * gotoxy() must verify all boundaries, because the arguments
1045 * might also be negative. If the given position is out of
1046 * bounds, the cursor is placed at the nearest margin.
1047 */
1048static void gotoxy(struct vc_data *vc, int new_x, int new_y)
1049{
1050 int min_y, max_y;
1051
1052 if (new_x < 0)
1053 vc->vc_x = 0;
1054 else {
1055 if (new_x >= vc->vc_cols)
1056 vc->vc_x = vc->vc_cols - 1;
1057 else
1058 vc->vc_x = new_x;
1059 }
1060
1061 if (vc->vc_decom) {
1062 min_y = vc->vc_top;
1063 max_y = vc->vc_bottom;
1064 } else {
1065 min_y = 0;
1066 max_y = vc->vc_rows;
1067 }
1068 if (new_y < min_y)
1069 vc->vc_y = min_y;
1070 else if (new_y >= max_y)
1071 vc->vc_y = max_y - 1;
1072 else
1073 vc->vc_y = new_y;
1074 vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1);
1075 vc->vc_need_wrap = 0;
1076}
1077
1078/* for absolute user moves, when decom is set */
1079static void gotoxay(struct vc_data *vc, int new_x, int new_y)
1080{
1081 gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y);
1082}
1083
1084void scrollback(struct vc_data *vc, int lines)
1085{
1086 if (!lines)
1087 lines = vc->vc_rows / 2;
1088 scrolldelta(-lines);
1089}
1090
1091void scrollfront(struct vc_data *vc, int lines)
1092{
1093 if (!lines)
1094 lines = vc->vc_rows / 2;
1095 scrolldelta(lines);
1096}
1097
1098static void lf(struct vc_data *vc)
1099{
1100 /* don't scroll if above bottom of scrolling region, or
1101 * if below scrolling region
1102 */
1103 if (vc->vc_y + 1 == vc->vc_bottom)
1104 scrup(vc, vc->vc_top, vc->vc_bottom, 1);
1105 else if (vc->vc_y < vc->vc_rows - 1) {
1106 vc->vc_y++;
1107 vc->vc_pos += vc->vc_size_row;
1108 }
1109 vc->vc_need_wrap = 0;
b293d758 1110 notify_write(vc, '\n');
1da177e4
LT		 1111}
1112
1113static void ri(struct vc_data *vc)
1114{
1115 /* don't scroll if below top of scrolling region, or
1116 * if above scrolling region
1117 */
1118 if (vc->vc_y == vc->vc_top)
1119 scrdown(vc, vc->vc_top, vc->vc_bottom, 1);
1120 else if (vc->vc_y > 0) {
1121 vc->vc_y--;
1122 vc->vc_pos -= vc->vc_size_row;
1123 }
1124 vc->vc_need_wrap = 0;
1125}
1126
1127static inline void cr(struct vc_data *vc)
1128{
1129 vc->vc_pos -= vc->vc_x << 1;
1130 vc->vc_need_wrap = vc->vc_x = 0;
b293d758 1131 notify_write(vc, '\r');
1da177e4
LT		 1132}
1133
1134static inline void bs(struct vc_data *vc)
1135{
1136 if (vc->vc_x) {
1137 vc->vc_pos -= 2;
1138 vc->vc_x--;
1139 vc->vc_need_wrap = 0;
b293d758 1140 notify_write(vc, '\b');
1da177e4
LT		 1141 }
1142}
1143
1144static inline void del(struct vc_data *vc)
1145{
1146 /* ignored */
1147}
1148
1149static void csi_J(struct vc_data *vc, int vpar)
1150{
1151 unsigned int count;
1152 unsigned short * start;
1153
1154 switch (vpar) {
1155 case 0: /* erase from cursor to end of display */
1156 count = (vc->vc_scr_end - vc->vc_pos) >> 1;
1157 start = (unsigned short *)vc->vc_pos;
1da177e4
LT		 1158 break;
1159 case 1: /* erase from start to cursor */
1160 count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1;
1161 start = (unsigned short *)vc->vc_origin;
1da177e4 1162 break;
f8df13e0
PP		 1163 case 3: /* erase scroll-back buffer (and whole display) */
1164 scr_memsetw(vc->vc_screenbuf, vc->vc_video_erase_char,
1165 vc->vc_screenbuf_size >> 1);
1166 set_origin(vc);
f8df13e0 1167 /* fall through */
1da177e4
LT		 1168 case 2: /* erase whole display */
1169 count = vc->vc_cols * vc->vc_rows;
1170 start = (unsigned short *)vc->vc_origin;
1da177e4
LT		 1171 break;
1172 default:
1173 return;
1174 }
1175 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
81732c3b
JFM		 1176 if (DO_UPDATE(vc))
1177 do_update_region(vc, (unsigned long) start, count);
1da177e4
LT		 1178 vc->vc_need_wrap = 0;
1179}
1180
1181static void csi_K(struct vc_data *vc, int vpar)
1182{
1183 unsigned int count;
1184 unsigned short * start;
1185
1186 switch (vpar) {
1187 case 0: /* erase from cursor to end of line */
1188 count = vc->vc_cols - vc->vc_x;
1189 start = (unsigned short *)vc->vc_pos;
1da177e4
LT		 1190 break;
1191 case 1: /* erase from start of line to cursor */
1192 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1193 count = vc->vc_x + 1;
1da177e4
LT		 1194 break;
1195 case 2: /* erase whole line */
1196 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1197 count = vc->vc_cols;
1da177e4
LT		 1198 break;
1199 default:
1200 return;
1201 }
1202 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1203 vc->vc_need_wrap = 0;
81732c3b
JFM		 1204 if (DO_UPDATE(vc))
1205 do_update_region(vc, (unsigned long) start, count);
1da177e4
LT		 1206}
1207
1208static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */
1209{ /* not vt100? */
1210 int count;
1211
1212 if (!vpar)
1213 vpar++;
1214 count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar;
1215
1216 scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count);
1217 if (DO_UPDATE(vc))
1218 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count);
1219 vc->vc_need_wrap = 0;
1220}
1221
1222static void default_attr(struct vc_data *vc)
1223{
1224 vc->vc_intensity = 1;
fa6ce9ab 1225 vc->vc_italic = 0;
1da177e4
LT		 1226 vc->vc_underline = 0;
1227 vc->vc_reverse = 0;
1228 vc->vc_blink = 0;
1229 vc->vc_color = vc->vc_def_color;
1230}
1231
ac751efa 1232/* console_lock is held */
1da177e4
LT		 1233static void csi_m(struct vc_data *vc)
1234{
1235 int i;
1236
1237 for (i = 0; i <= vc->vc_npar; i++)
1238 switch (vc->vc_par[i]) {
1239 case 0: /* all attributes off */
1240 default_attr(vc);
1241 break;
1242 case 1:
1243 vc->vc_intensity = 2;
1244 break;
1245 case 2:
1246 vc->vc_intensity = 0;
1247 break;
fa6ce9ab
JE		 1248 case 3:
1249 vc->vc_italic = 1;
1250 break;
1da177e4
LT		 1251 case 4:
1252 vc->vc_underline = 1;
1253 break;
1254 case 5:
1255 vc->vc_blink = 1;
1256 break;
1257 case 7:
1258 vc->vc_reverse = 1;
1259 break;
1260 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1261 * Select primary font, don't display
1262 * control chars if defined, don't set
1263 * bit 8 on output.
1264 */
1265 vc->vc_translate = set_translate(vc->vc_charset == 0
1266 ? vc->vc_G0_charset
1267 : vc->vc_G1_charset, vc);
1268 vc->vc_disp_ctrl = 0;
1269 vc->vc_toggle_meta = 0;
1270 break;
1271 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1272 * Select first alternate font, lets
1273 * chars < 32 be displayed as ROM chars.
1274 */
1275 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1276 vc->vc_disp_ctrl = 1;
1277 vc->vc_toggle_meta = 0;
1278 break;
1279 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1280 * Select second alternate font, toggle
1281 * high bit before displaying as ROM char.
1282 */
1283 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1284 vc->vc_disp_ctrl = 1;
1285 vc->vc_toggle_meta = 1;
1286 break;
1287 case 21:
1288 case 22:
1289 vc->vc_intensity = 1;
1290 break;
fa6ce9ab
JE		 1291 case 23:
1292 vc->vc_italic = 0;
1293 break;
1da177e4
LT		 1294 case 24:
1295 vc->vc_underline = 0;
1296 break;
1297 case 25:
1298 vc->vc_blink = 0;
1299 break;
1300 case 27:
1301 vc->vc_reverse = 0;
1302 break;
64545880 1303 case 39:
1da177e4 1304 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1da177e4
LT		 1305 break;
1306 case 49:
1307 vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f);
1308 break;
1309 default:
1310 if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37)
1311 vc->vc_color = color_table[vc->vc_par[i] - 30]
1312 | (vc->vc_color & 0xf0);
1313 else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47)
1314 vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4)
1315 | (vc->vc_color & 0x0f);
1316 break;
1317 }
1318 update_attr(vc);
1319}
1320
6732c8bb 1321static void respond_string(const char *p, struct tty_port *port)
1da177e4
LT		 1322{
1323 while (*p) {
6732c8bb 1324 tty_insert_flip_char(port, *p, 0);
1da177e4
LT		 1325 p++;
1326 }
6732c8bb 1327 tty_schedule_flip(port);
1da177e4
LT		 1328}
1329
1330static void cursor_report(struct vc_data *vc, struct tty_struct *tty)
1331{
1332 char buf[40];
1333
1334 sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1);
6732c8bb 1335 respond_string(buf, tty->port);
1da177e4
LT		 1336}
1337
1338static inline void status_report(struct tty_struct *tty)
1339{
6732c8bb 1340 respond_string("\033[0n", tty->port); /* Terminal ok */
1da177e4
LT		 1341}
1342
6732c8bb 1343static inline void respond_ID(struct tty_struct *tty)
1da177e4 1344{
6732c8bb 1345 respond_string(VT102ID, tty->port);
1da177e4
LT		 1346}
1347
1348void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry)
1349{
1350 char buf[8];
1351
1352 sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx),
1353 (char)('!' + mry));
6732c8bb 1354 respond_string(buf, tty->port);
1da177e4
LT		 1355}
1356
1357/* invoked via ioctl(TIOCLINUX) and through set_selection */
1358int mouse_reporting(void)
1359{
1360 return vc_cons[fg_console].d->vc_report_mouse;
1361}
1362
ac751efa 1363/* console_lock is held */
1da177e4
LT		 1364static void set_mode(struct vc_data *vc, int on_off)
1365{
1366 int i;
1367
1368 for (i = 0; i <= vc->vc_npar; i++)
1369 if (vc->vc_ques) {
1370 switch(vc->vc_par[i]) { /* DEC private modes set/reset */
1371 case 1: /* Cursor keys send ^[Ox/^[[x */
1372 if (on_off)
1373 set_kbd(vc, decckm);
1374 else
1375 clr_kbd(vc, decckm);
1376 break;
1377 case 3: /* 80/132 mode switch unimplemented */
1378 vc->vc_deccolm = on_off;
1379#if 0
1380 vc_resize(deccolm ? 132 : 80, vc->vc_rows);
1381 /* this alone does not suffice; some user mode
1382 utility has to change the hardware regs */
1383#endif
1384 break;
1385 case 5: /* Inverted screen on/off */
1386 if (vc->vc_decscnm != on_off) {
1387 vc->vc_decscnm = on_off;
1388 invert_screen(vc, 0, vc->vc_screenbuf_size, 0);
1389 update_attr(vc);
1390 }
1391 break;
1392 case 6: /* Origin relative/absolute */
1393 vc->vc_decom = on_off;
1394 gotoxay(vc, 0, 0);
1395 break;
1396 case 7: /* Autowrap on/off */
1397 vc->vc_decawm = on_off;
1398 break;
1399 case 8: /* Autorepeat on/off */
1400 if (on_off)
1401 set_kbd(vc, decarm);
1402 else
1403 clr_kbd(vc, decarm);
1404 break;
1405 case 9:
1406 vc->vc_report_mouse = on_off ? 1 : 0;
1407 break;
1408 case 25: /* Cursor on/off */
1409 vc->vc_deccm = on_off;
1410 break;
1411 case 1000:
1412 vc->vc_report_mouse = on_off ? 2 : 0;
1413 break;
1414 }
1415 } else {
1416 switch(vc->vc_par[i]) { /* ANSI modes set/reset */
1417 case 3: /* Monitor (display ctrls) */
1418 vc->vc_disp_ctrl = on_off;
1419 break;
1420 case 4: /* Insert Mode on/off */
1421 vc->vc_decim = on_off;
1422 break;
1423 case 20: /* Lf, Enter == CrLf/Lf */
1424 if (on_off)
1425 set_kbd(vc, lnm);
1426 else
1427 clr_kbd(vc, lnm);
1428 break;
1429 }
1430 }
1431}
1432
ac751efa 1433/* console_lock is held */
1da177e4
LT		 1434static void setterm_command(struct vc_data *vc)
1435{
1436 switch(vc->vc_par[0]) {
1437 case 1: /* set color for underline mode */
1438 if (vc->vc_can_do_color &&
1439 vc->vc_par[1] < 16) {
1440 vc->vc_ulcolor = color_table[vc->vc_par[1]];
1441 if (vc->vc_underline)
1442 update_attr(vc);
1443 }
1444 break;
1445 case 2: /* set color for half intensity mode */
1446 if (vc->vc_can_do_color &&
1447 vc->vc_par[1] < 16) {
1448 vc->vc_halfcolor = color_table[vc->vc_par[1]];
1449 if (vc->vc_intensity == 0)
1450 update_attr(vc);
1451 }
1452 break;
1453 case 8: /* store colors as defaults */
1454 vc->vc_def_color = vc->vc_attr;
1455 if (vc->vc_hi_font_mask == 0x100)
1456 vc->vc_def_color >>= 1;
1457 default_attr(vc);
1458 update_attr(vc);
1459 break;
1460 case 9: /* set blanking interval */
f324edc8 1461 blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60;
1da177e4
LT		 1462 poke_blanked_console();
1463 break;
1464 case 10: /* set bell frequency in Hz */
1465 if (vc->vc_npar >= 1)
1466 vc->vc_bell_pitch = vc->vc_par[1];
1467 else
1468 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1469 break;
1470 case 11: /* set bell duration in msec */
1471 if (vc->vc_npar >= 1)
1472 vc->vc_bell_duration = (vc->vc_par[1] < 2000) ?
1473 vc->vc_par[1] * HZ / 1000 : 0;
1474 else
1475 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1476 break;
1477 case 12: /* bring specified console to the front */
1478 if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1))
1479 set_console(vc->vc_par[1] - 1);
1480 break;
1481 case 13: /* unblank the screen */
1482 poke_blanked_console();
1483 break;
1484 case 14: /* set vesa powerdown interval */
1485 vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1486 break;
1487 case 15: /* activate the previous console */
1488 set_console(last_console);
1489 break;
1490 }
1491}
1492
ac751efa 1493/* console_lock is held */
1da177e4
LT		 1494static void csi_at(struct vc_data *vc, unsigned int nr)
1495{
1496 if (nr > vc->vc_cols - vc->vc_x)
1497 nr = vc->vc_cols - vc->vc_x;
1498 else if (!nr)
1499 nr = 1;
1500 insert_char(vc, nr);
1501}
1502
ac751efa 1503/* console_lock is held */
1da177e4
LT		 1504static void csi_L(struct vc_data *vc, unsigned int nr)
1505{
1506 if (nr > vc->vc_rows - vc->vc_y)
1507 nr = vc->vc_rows - vc->vc_y;
1508 else if (!nr)
1509 nr = 1;
1510 scrdown(vc, vc->vc_y, vc->vc_bottom, nr);
1511 vc->vc_need_wrap = 0;
1512}
1513
ac751efa 1514/* console_lock is held */
1da177e4
LT		 1515static void csi_P(struct vc_data *vc, unsigned int nr)
1516{
1517 if (nr > vc->vc_cols - vc->vc_x)
1518 nr = vc->vc_cols - vc->vc_x;
1519 else if (!nr)
1520 nr = 1;
1521 delete_char(vc, nr);
1522}
1523
ac751efa 1524/* console_lock is held */
1da177e4
LT		 1525static void csi_M(struct vc_data *vc, unsigned int nr)
1526{
1527 if (nr > vc->vc_rows - vc->vc_y)
1528 nr = vc->vc_rows - vc->vc_y;
1529 else if (!nr)
1530 nr=1;
1531 scrup(vc, vc->vc_y, vc->vc_bottom, nr);
1532 vc->vc_need_wrap = 0;
1533}
1534
ac751efa 1535/* console_lock is held (except via vc_init->reset_terminal */
1da177e4
LT		 1536static void save_cur(struct vc_data *vc)
1537{
1538 vc->vc_saved_x = vc->vc_x;
1539 vc->vc_saved_y = vc->vc_y;
1540 vc->vc_s_intensity = vc->vc_intensity;
fa6ce9ab 1541 vc->vc_s_italic = vc->vc_italic;
1da177e4
LT		 1542 vc->vc_s_underline = vc->vc_underline;
1543 vc->vc_s_blink = vc->vc_blink;
1544 vc->vc_s_reverse = vc->vc_reverse;
1545 vc->vc_s_charset = vc->vc_charset;
1546 vc->vc_s_color = vc->vc_color;
1547 vc->vc_saved_G0 = vc->vc_G0_charset;
1548 vc->vc_saved_G1 = vc->vc_G1_charset;
1549}
1550
ac751efa 1551/* console_lock is held */
1da177e4
LT		 1552static void restore_cur(struct vc_data *vc)
1553{
1554 gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y);
1555 vc->vc_intensity = vc->vc_s_intensity;
fa6ce9ab 1556 vc->vc_italic = vc->vc_s_italic;
1da177e4
LT		 1557 vc->vc_underline = vc->vc_s_underline;
1558 vc->vc_blink = vc->vc_s_blink;
1559 vc->vc_reverse = vc->vc_s_reverse;
1560 vc->vc_charset = vc->vc_s_charset;
1561 vc->vc_color = vc->vc_s_color;
1562 vc->vc_G0_charset = vc->vc_saved_G0;
1563 vc->vc_G1_charset = vc->vc_saved_G1;
1564 vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc);
1565 update_attr(vc);
1566 vc->vc_need_wrap = 0;
1567}
1568
1569enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey,
1570 EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd,
1571 ESpalette };
1572
ac751efa 1573/* console_lock is held (except via vc_init()) */
1da177e4
LT		 1574static void reset_terminal(struct vc_data *vc, int do_clear)
1575{
1576 vc->vc_top = 0;
1577 vc->vc_bottom = vc->vc_rows;
1578 vc->vc_state = ESnormal;
1579 vc->vc_ques = 0;
1580 vc->vc_translate = set_translate(LAT1_MAP, vc);
1581 vc->vc_G0_charset = LAT1_MAP;
1582 vc->vc_G1_charset = GRAF_MAP;
1583 vc->vc_charset = 0;
1584 vc->vc_need_wrap = 0;
1585 vc->vc_report_mouse = 0;
042f10ec 1586 vc->vc_utf = default_utf8;
1da177e4
LT		 1587 vc->vc_utf_count = 0;
1588
1589 vc->vc_disp_ctrl = 0;
1590 vc->vc_toggle_meta = 0;
1591
1592 vc->vc_decscnm = 0;
1593 vc->vc_decom = 0;
1594 vc->vc_decawm = 1;
f6c06b68 1595 vc->vc_deccm = global_cursor_default;
1da177e4
LT		 1596 vc->vc_decim = 0;
1597
079c9534 1598 vt_reset_keyboard(vc->vc_num);
1da177e4 1599
9ea9a886 1600 vc->vc_cursor_type = cur_default;
1da177e4
LT		 1601 vc->vc_complement_mask = vc->vc_s_complement_mask;
1602
1603 default_attr(vc);
1604 update_attr(vc);
1605
1606 vc->vc_tab_stop[0] = 0x01010100;
1607 vc->vc_tab_stop[1] =
1608 vc->vc_tab_stop[2] =
1609 vc->vc_tab_stop[3] =
a564738c
WK		 1610 vc->vc_tab_stop[4] =
1611 vc->vc_tab_stop[5] =
1612 vc->vc_tab_stop[6] =
1613 vc->vc_tab_stop[7] = 0x01010101;
1da177e4
LT		 1614
1615 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1616 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1617
1618 gotoxy(vc, 0, 0);
1619 save_cur(vc);
1620 if (do_clear)
1621 csi_J(vc, 2);
1622}
1623
ac751efa 1624/* console_lock is held */
1da177e4
LT		 1625static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
1626{
1627 /*
1628 * Control characters can be used in the _middle_
1629 * of an escape sequence.
1630 */
1631 switch (c) {
1632 case 0:
1633 return;
1634 case 7:
1635 if (vc->vc_bell_duration)
1636 kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration);
1637 return;
1638 case 8:
1639 bs(vc);
1640 return;
1641 case 9:
1642 vc->vc_pos -= (vc->vc_x << 1);
1643 while (vc->vc_x < vc->vc_cols - 1) {
1644 vc->vc_x++;
1645 if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31)))
1646 break;
1647 }
1648 vc->vc_pos += (vc->vc_x << 1);
b293d758 1649 notify_write(vc, '\t');
1da177e4
LT		 1650 return;
1651 case 10: case 11: case 12:
1652 lf(vc);
1653 if (!is_kbd(vc, lnm))
1654 return;
1655 case 13:
1656 cr(vc);
1657 return;
1658 case 14:
1659 vc->vc_charset = 1;
1660 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1661 vc->vc_disp_ctrl = 1;
1662 return;
1663 case 15:
1664 vc->vc_charset = 0;
1665 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1666 vc->vc_disp_ctrl = 0;
1667 return;
1668 case 24: case 26:
1669 vc->vc_state = ESnormal;
1670 return;
1671 case 27:
1672 vc->vc_state = ESesc;
1673 return;
1674 case 127:
1675 del(vc);
1676 return;
1677 case 128+27:
1678 vc->vc_state = ESsquare;
1679 return;
1680 }
1681 switch(vc->vc_state) {
1682 case ESesc:
1683 vc->vc_state = ESnormal;
1684 switch (c) {
1685 case '[':
1686 vc->vc_state = ESsquare;
1687 return;
1688 case ']':
1689 vc->vc_state = ESnonstd;
1690 return;
1691 case '%':
1692 vc->vc_state = ESpercent;
1693 return;
1694 case 'E':
1695 cr(vc);
1696 lf(vc);
1697 return;
1698 case 'M':
1699 ri(vc);
1700 return;
1701 case 'D':
1702 lf(vc);
1703 return;
1704 case 'H':
1705 vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31));
1706 return;
1707 case 'Z':
1708 respond_ID(tty);
1709 return;
1710 case '7':
1711 save_cur(vc);
1712 return;
1713 case '8':
1714 restore_cur(vc);
1715 return;
1716 case '(':
1717 vc->vc_state = ESsetG0;
1718 return;
1719 case ')':
1720 vc->vc_state = ESsetG1;
1721 return;
1722 case '#':
1723 vc->vc_state = EShash;
1724 return;
1725 case 'c':
1726 reset_terminal(vc, 1);
1727 return;
1728 case '>': /* Numeric keypad */
1729 clr_kbd(vc, kbdapplic);
1730 return;
1731 case '=': /* Appl. keypad */
1732 set_kbd(vc, kbdapplic);
1733 return;
1734 }
1735 return;
1736 case ESnonstd:
1737 if (c=='P') { /* palette escape sequence */
1738 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1739 vc->vc_par[vc->vc_npar] = 0;
1740 vc->vc_npar = 0;
1741 vc->vc_state = ESpalette;
1742 return;
1743 } else if (c=='R') { /* reset palette */
1744 reset_palette(vc);
1745 vc->vc_state = ESnormal;
1746 } else
1747 vc->vc_state = ESnormal;
1748 return;
1749 case ESpalette:
74c807ce
AS		 1750 if (isxdigit(c)) {
1751 vc->vc_par[vc->vc_npar++] = hex_to_bin(c);
1da177e4
LT		 1752 if (vc->vc_npar == 7) {
1753 int i = vc->vc_par[0] * 3, j = 1;
1754 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1755 vc->vc_palette[i++] += vc->vc_par[j++];
1756 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1757 vc->vc_palette[i++] += vc->vc_par[j++];
1758 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1759 vc->vc_palette[i] += vc->vc_par[j];
1760 set_palette(vc);
1761 vc->vc_state = ESnormal;
1762 }
1763 } else
1764 vc->vc_state = ESnormal;
1765 return;
1766 case ESsquare:
1767 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1768 vc->vc_par[vc->vc_npar] = 0;
1769 vc->vc_npar = 0;
1770 vc->vc_state = ESgetpars;
1771 if (c == '[') { /* Function key */
1772 vc->vc_state=ESfunckey;
1773 return;
1774 }
1775 vc->vc_ques = (c == '?');
1776 if (vc->vc_ques)
1777 return;
1778 case ESgetpars:
1779 if (c == ';' && vc->vc_npar < NPAR - 1) {
1780 vc->vc_npar++;
1781 return;
1782 } else if (c>='0' && c<='9') {
1783 vc->vc_par[vc->vc_npar] *= 10;
1784 vc->vc_par[vc->vc_npar] += c - '0';
1785 return;
1786 } else
1787 vc->vc_state = ESgotpars;
1788 case ESgotpars:
1789 vc->vc_state = ESnormal;
1790 switch(c) {
1791 case 'h':
1792 set_mode(vc, 1);
1793 return;
1794 case 'l':
1795 set_mode(vc, 0);
1796 return;
1797 case 'c':
1798 if (vc->vc_ques) {
1799 if (vc->vc_par[0])
1800 vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16);
1801 else
9ea9a886 1802 vc->vc_cursor_type = cur_default;
1da177e4
LT		 1803 return;
1804 }
1805 break;
1806 case 'm':
1807 if (vc->vc_ques) {
1808 clear_selection();
1809 if (vc->vc_par[0])
1810 vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1];
1811 else
1812 vc->vc_complement_mask = vc->vc_s_complement_mask;
1813 return;
1814 }
1815 break;
1816 case 'n':
1817 if (!vc->vc_ques) {
1818 if (vc->vc_par[0] == 5)
1819 status_report(tty);
1820 else if (vc->vc_par[0] == 6)
1821 cursor_report(vc, tty);
1822 }
1823 return;
1824 }
1825 if (vc->vc_ques) {
1826 vc->vc_ques = 0;
1827 return;
1828 }
1829 switch(c) {
1830 case 'G': case '`':
1831 if (vc->vc_par[0])
1832 vc->vc_par[0]--;
1833 gotoxy(vc, vc->vc_par[0], vc->vc_y);
1834 return;
1835 case 'A':
1836 if (!vc->vc_par[0])
1837 vc->vc_par[0]++;
1838 gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]);
1839 return;
1840 case 'B': case 'e':
1841 if (!vc->vc_par[0])
1842 vc->vc_par[0]++;
1843 gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]);
1844 return;
1845 case 'C': case 'a':
1846 if (!vc->vc_par[0])
1847 vc->vc_par[0]++;
1848 gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y);
1849 return;
1850 case 'D':
1851 if (!vc->vc_par[0])
1852 vc->vc_par[0]++;
1853 gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y);
1854 return;
1855 case 'E':
1856 if (!vc->vc_par[0])
1857 vc->vc_par[0]++;
1858 gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]);
1859 return;
1860 case 'F':
1861 if (!vc->vc_par[0])
1862 vc->vc_par[0]++;
1863 gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]);
1864 return;
1865 case 'd':
1866 if (vc->vc_par[0])
1867 vc->vc_par[0]--;
1868 gotoxay(vc, vc->vc_x ,vc->vc_par[0]);
1869 return;
1870 case 'H': case 'f':
1871 if (vc->vc_par[0])
1872 vc->vc_par[0]--;
1873 if (vc->vc_par[1])
1874 vc->vc_par[1]--;
1875 gotoxay(vc, vc->vc_par[1], vc->vc_par[0]);
1876 return;
1877 case 'J':
1878 csi_J(vc, vc->vc_par[0]);
1879 return;
1880 case 'K':
1881 csi_K(vc, vc->vc_par[0]);
1882 return;
1883 case 'L':
1884 csi_L(vc, vc->vc_par[0]);
1885 return;
1886 case 'M':
1887 csi_M(vc, vc->vc_par[0]);
1888 return;
1889 case 'P':
1890 csi_P(vc, vc->vc_par[0]);
1891 return;
1892 case 'c':
1893 if (!vc->vc_par[0])
1894 respond_ID(tty);
1895 return;
1896 case 'g':
1897 if (!vc->vc_par[0])
1898 vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31));
1899 else if (vc->vc_par[0] == 3) {
1900 vc->vc_tab_stop[0] =
1901 vc->vc_tab_stop[1] =
1902 vc->vc_tab_stop[2] =
1903 vc->vc_tab_stop[3] =
a564738c
WK		 1904 vc->vc_tab_stop[4] =
1905 vc->vc_tab_stop[5] =
1906 vc->vc_tab_stop[6] =
1907 vc->vc_tab_stop[7] = 0;
1da177e4
LT		 1908 }
1909 return;
1910 case 'm':
1911 csi_m(vc);
1912 return;
1913 case 'q': /* DECLL - but only 3 leds */
1914 /* map 0,1,2,3 to 0,1,2,4 */
1915 if (vc->vc_par[0] < 4)
079c9534 1916 vt_set_led_state(vc->vc_num,
1da177e4
LT		 1917 (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4);
1918 return;
1919 case 'r':
1920 if (!vc->vc_par[0])
1921 vc->vc_par[0]++;
1922 if (!vc->vc_par[1])
1923 vc->vc_par[1] = vc->vc_rows;
1924 /* Minimum allowed region is 2 lines */
1925 if (vc->vc_par[0] < vc->vc_par[1] &&
1926 vc->vc_par[1] <= vc->vc_rows) {
1927 vc->vc_top = vc->vc_par[0] - 1;
1928 vc->vc_bottom = vc->vc_par[1];
1929 gotoxay(vc, 0, 0);
1930 }
1931 return;
1932 case 's':
1933 save_cur(vc);
1934 return;
1935 case 'u':
1936 restore_cur(vc);
1937 return;
1938 case 'X':
1939 csi_X(vc, vc->vc_par[0]);
1940 return;
1941 case '@':
1942 csi_at(vc, vc->vc_par[0]);
1943 return;
1944 case ']': /* setterm functions */
1945 setterm_command(vc);
1946 return;
1947 }
1948 return;
1949 case ESpercent:
1950 vc->vc_state = ESnormal;
1951 switch (c) {
1952 case '@': /* defined in ISO 2022 */
1953 vc->vc_utf = 0;
1954 return;
1955 case 'G': /* prelim official escape code */
1956 case '8': /* retained for compatibility */
1957 vc->vc_utf = 1;
1958 return;
1959 }
1960 return;
1961 case ESfunckey:
1962 vc->vc_state = ESnormal;
1963 return;
1964 case EShash:
1965 vc->vc_state = ESnormal;
1966 if (c == '8') {
1967 /* DEC screen alignment test. kludge :-) */
1968 vc->vc_video_erase_char =
1969 (vc->vc_video_erase_char & 0xff00) | 'E';
1970 csi_J(vc, 2);
1971 vc->vc_video_erase_char =
1972 (vc->vc_video_erase_char & 0xff00) | ' ';
1973 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
1974 }
1975 return;
1976 case ESsetG0:
1977 if (c == '0')
1978 vc->vc_G0_charset = GRAF_MAP;
1979 else if (c == 'B')
1980 vc->vc_G0_charset = LAT1_MAP;
1981 else if (c == 'U')
1982 vc->vc_G0_charset = IBMPC_MAP;
1983 else if (c == 'K')
1984 vc->vc_G0_charset = USER_MAP;
1985 if (vc->vc_charset == 0)
1986 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1987 vc->vc_state = ESnormal;
1988 return;
1989 case ESsetG1:
1990 if (c == '0')
1991 vc->vc_G1_charset = GRAF_MAP;
1992 else if (c == 'B')
1993 vc->vc_G1_charset = LAT1_MAP;
1994 else if (c == 'U')
1995 vc->vc_G1_charset = IBMPC_MAP;
1996 else if (c == 'K')
1997 vc->vc_G1_charset = USER_MAP;
1998 if (vc->vc_charset == 1)
1999 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
2000 vc->vc_state = ESnormal;
2001 return;
2002 default:
2003 vc->vc_state = ESnormal;
2004 }
2005}
2006
2f1a2ccb 2007/* is_double_width() is based on the wcwidth() implementation by
1ed8a2b3 2008 * Markus Kuhn -- 2007-05-26 (Unicode 5.0)
2f1a2ccb
EK		 2009 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
2010 */
2011struct interval {
2012 uint32_t first;
2013 uint32_t last;
2014};
2015
2016static int bisearch(uint32_t ucs, const struct interval *table, int max)
2017{
2018 int min = 0;
2019 int mid;
2020
2021 if (ucs < table[0].first || ucs > table[max].last)
2022 return 0;
2023 while (max >= min) {
2024 mid = (min + max) / 2;
2025 if (ucs > table[mid].last)
2026 min = mid + 1;
2027 else if (ucs < table[mid].first)
2028 max = mid - 1;
2029 else
2030 return 1;
2031 }
2032 return 0;
2033}
2034
2035static int is_double_width(uint32_t ucs)
2036{
2037 static const struct interval double_width[] = {
2038 { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E },
2039 { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF },
1ed8a2b3
EK		 2040 { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 },
2041 { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD }
2f1a2ccb 2042 };
0f11541b 2043 return bisearch(ucs, double_width, ARRAY_SIZE(double_width) - 1);
2f1a2ccb
EK		 2044}
2045
ac751efa 2046/* acquires console_lock */
1da177e4
LT		 2047static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2048{
2049#ifdef VT_BUF_VRAM_ONLY
2050#define FLUSH do { } while(0);
2051#else
2052#define FLUSH if (draw_x >= 0) { \
2053 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
2054 draw_x = -1; \
2055 }
2056#endif
2057
2058 int c, tc, ok, n = 0, draw_x = -1;
2059 unsigned int currcons;
2060 unsigned long draw_from = 0, draw_to = 0;
2061 struct vc_data *vc;
2f1a2ccb 2062 unsigned char vc_attr;
0341a4d0 2063 struct vt_notifier_param param;
2f1a2ccb
EK		 2064 uint8_t rescan;
2065 uint8_t inverse;
2066 uint8_t width;
1da177e4 2067 u16 himask, charmask;
1da177e4
LT		 2068
2069 if (in_interrupt())
2070 return count;
2071
2072 might_sleep();
2073
ac751efa 2074 console_lock();
1da177e4
LT		 2075 vc = tty->driver_data;
2076 if (vc == NULL) {
2077 printk(KERN_ERR "vt: argh, driver_data is NULL !\n");
ac751efa 2078 console_unlock();
1da177e4
LT		 2079 return 0;
2080 }
2081
2082 currcons = vc->vc_num;
2083 if (!vc_cons_allocated(currcons)) {
1ffdda95
MSB		 2084 /* could this happen? */
2085 pr_warn_once("con_write: tty %d not allocated\n", currcons+1);
2086 console_unlock();
2087 return 0;
1da177e4 2088 }
1da177e4 2089
1da177e4
LT		 2090 himask = vc->vc_hi_font_mask;
2091 charmask = himask ? 0x1ff : 0xff;
2092
2093 /* undraw cursor first */
2094 if (IS_FG(vc))
2095 hide_cursor(vc);
2096
0341a4d0
KD		 2097 param.vc = vc;
2098
1da177e4
LT		 2099 while (!tty->stopped && count) {
2100 int orig = *buf;
2101 c = orig;
2102 buf++;
2103 n++;
2104 count--;
2f1a2ccb
EK		 2105 rescan = 0;
2106 inverse = 0;
2107 width = 1;
1da177e4
LT		 2108
2109 /* Do no translation at all in control states */
2110 if (vc->vc_state != ESnormal) {
2111 tc = c;
d4328b40 2112 } else if (vc->vc_utf && !vc->vc_disp_ctrl) {
2f1a2ccb
EK		 2113 /* Combine UTF-8 into Unicode in vc_utf_char.
2114 * vc_utf_count is the number of continuation bytes still
2115 * expected to arrive.
2116 * vc_npar is the number of continuation bytes arrived so
2117 * far
2118 */
d4328b40 2119rescan_last_byte:
2f1a2ccb
EK		 2120 if ((c & 0xc0) == 0x80) {
2121 /* Continuation byte received */
2122 static const uint32_t utf8_length_changes[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff };
d4328b40 2123 if (vc->vc_utf_count) {
2f1a2ccb
EK		 2124 vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f);
2125 vc->vc_npar++;
2126 if (--vc->vc_utf_count) {
2127 /* Still need some bytes */
1da177e4 2128 continue;
2f1a2ccb
EK		 2129 }
2130 /* Got a whole character */
2131 c = vc->vc_utf_char;
2132 /* Reject overlong sequences */
2133 if (c <= utf8_length_changes[vc->vc_npar - 1] ||
2134 c > utf8_length_changes[vc->vc_npar])
2135 c = 0xfffd;
2136 } else {
2137 /* Unexpected continuation byte */
2138 vc->vc_utf_count = 0;
2139 c = 0xfffd;
2140 }
1da177e4 2141 } else {
2f1a2ccb
EK		 2142 /* Single ASCII byte or first byte of a sequence received */
2143 if (vc->vc_utf_count) {
2144 /* Continuation byte expected */
2145 rescan = 1;
2146 vc->vc_utf_count = 0;
2147 c = 0xfffd;
2148 } else if (c > 0x7f) {
2149 /* First byte of a multibyte sequence received */
2150 vc->vc_npar = 0;
2151 if ((c & 0xe0) == 0xc0) {
2152 vc->vc_utf_count = 1;
2153 vc->vc_utf_char = (c & 0x1f);
2154 } else if ((c & 0xf0) == 0xe0) {
2155 vc->vc_utf_count = 2;
2156 vc->vc_utf_char = (c & 0x0f);
2157 } else if ((c & 0xf8) == 0xf0) {
2158 vc->vc_utf_count = 3;
2159 vc->vc_utf_char = (c & 0x07);
2160 } else if ((c & 0xfc) == 0xf8) {
2161 vc->vc_utf_count = 4;
2162 vc->vc_utf_char = (c & 0x03);
2163 } else if ((c & 0xfe) == 0xfc) {
2164 vc->vc_utf_count = 5;
2165 vc->vc_utf_char = (c & 0x01);
2166 } else {
2167 /* 254 and 255 are invalid */
2168 c = 0xfffd;
2169 }
2170 if (vc->vc_utf_count) {
2171 /* Still need some bytes */
2172 continue;
2173 }
2174 }
2175 /* Nothing to do if an ASCII byte was received */
1da177e4 2176 }
2f1a2ccb
EK		 2177 /* End of UTF-8 decoding. */
2178 /* c is the received character, or U+FFFD for invalid sequences. */
2179 /* Replace invalid Unicode code points with U+FFFD too */
2180 if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff)
2181 c = 0xfffd;
2182 tc = c;
d4328b40 2183 } else { /* no utf or alternate charset mode */
a29ccf6f 2184 tc = vc_translate(vc, c);
1da177e4
LT		 2185 }
2186
0341a4d0
KD		 2187 param.c = tc;
2188 if (atomic_notifier_call_chain(&vt_notifier_list, VT_PREWRITE,
2189 &param) == NOTIFY_STOP)
2190 continue;
2191
1da177e4
LT		 2192 /* If the original code was a control character we
2193 * only allow a glyph to be displayed if the code is
2194 * not normally used (such as for cursor movement) or
2195 * if the disp_ctrl mode has been explicitly enabled.
2196 * Certain characters (as given by the CTRL_ALWAYS
2197 * bitmap) are always displayed as control characters,
2198 * as the console would be pretty useless without
2199 * them; to display an arbitrary font position use the
2200 * direct-to-font zone in UTF-8 mode.
2201 */
2202 ok = tc && (c >= 32 ||
d4328b40
AT		 2203 !(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 :
2204 vc->vc_utf || ((CTRL_ACTION >> c) & 1)))
1da177e4
LT		 2205 && (c != 127 || vc->vc_disp_ctrl)
2206 && (c != 128+27);
2207
2208 if (vc->vc_state == ESnormal && ok) {
2f1a2ccb
EK		 2209 if (vc->vc_utf && !vc->vc_disp_ctrl) {
2210 if (is_double_width(c))
2211 width = 2;
2212 }
1da177e4
LT		 2213 /* Now try to find out how to display it */
2214 tc = conv_uni_to_pc(vc, tc);
d4328b40 2215 if (tc & ~charmask) {
2f1a2ccb
EK		 2216 if (tc == -1 || tc == -2) {
2217 continue; /* nothing to display */
2218 }
2219 /* Glyph not found */
c0b79882 2220 if ((!(vc->vc_utf && !vc->vc_disp_ctrl) || c < 128) && !(c & ~charmask)) {
2f1a2ccb 2221 /* In legacy mode use the glyph we get by a 1:1 mapping.
1ed8a2b3
EK		 2222 This would make absolutely no sense with Unicode in mind,
2223 but do this for ASCII characters since a font may lack
2224 Unicode mapping info and we don't want to end up with
2225 having question marks only. */
2f1a2ccb
EK		 2226 tc = c;
2227 } else {
2228 /* Display U+FFFD. If it's not found, display an inverse question mark. */
2229 tc = conv_uni_to_pc(vc, 0xfffd);
2230 if (tc < 0) {
2231 inverse = 1;
2232 tc = conv_uni_to_pc(vc, '?');
2233 if (tc < 0) tc = '?';
2234 }
2235 }
d4328b40 2236 }
1da177e4 2237
2f1a2ccb
EK		 2238 if (!inverse) {
2239 vc_attr = vc->vc_attr;
1da177e4 2240 } else {
2f1a2ccb
EK		 2241 /* invert vc_attr */
2242 if (!vc->vc_can_do_color) {
2243 vc_attr = (vc->vc_attr) ^ 0x08;
2244 } else if (vc->vc_hi_font_mask == 0x100) {
2245 vc_attr = ((vc->vc_attr) & 0x11) | (((vc->vc_attr) & 0xe0) >> 4) | (((vc->vc_attr) & 0x0e) << 4);
2246 } else {
2247 vc_attr = ((vc->vc_attr) & 0x88) | (((vc->vc_attr) & 0x70) >> 4) | (((vc->vc_attr) & 0x07) << 4);
2248 }
1ed8a2b3 2249 FLUSH
1da177e4 2250 }
2f1a2ccb
EK		 2251
2252 while (1) {
2253 if (vc->vc_need_wrap || vc->vc_decim)
2254 FLUSH
2255 if (vc->vc_need_wrap) {
2256 cr(vc);
2257 lf(vc);
2258 }
2259 if (vc->vc_decim)
2260 insert_char(vc, 1);
2261 scr_writew(himask ?
2262 ((vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) :
2263 (vc_attr << 8) + tc,
2264 (u16 *) vc->vc_pos);
2265 if (DO_UPDATE(vc) && draw_x < 0) {
2266 draw_x = vc->vc_x;
2267 draw_from = vc->vc_pos;
2268 }
2269 if (vc->vc_x == vc->vc_cols - 1) {
2270 vc->vc_need_wrap = vc->vc_decawm;
2271 draw_to = vc->vc_pos + 2;
2272 } else {
2273 vc->vc_x++;
2274 draw_to = (vc->vc_pos += 2);
d4328b40 2275 }
2f1a2ccb
EK		 2276
2277 if (!--width) break;
2278
2279 tc = conv_uni_to_pc(vc, ' '); /* A space is printed in the second column */
2280 if (tc < 0) tc = ' ';
2281 }
b293d758 2282 notify_write(vc, c);
2f1a2ccb 2283
1ed8a2b3
EK		 2284 if (inverse) {
2285 FLUSH
2286 }
2287
2f1a2ccb
EK		 2288 if (rescan) {
2289 rescan = 0;
2290 inverse = 0;
2291 width = 1;
d4328b40
AT		 2292 c = orig;
2293 goto rescan_last_byte;
2294 }
1da177e4
LT		 2295 continue;
2296 }
2297 FLUSH
2298 do_con_trol(tty, vc, orig);
2299 }
2300 FLUSH
2301 console_conditional_schedule();
ac751efa 2302 console_unlock();
b293d758 2303 notify_update(vc);
1da177e4
LT		 2304 return n;
2305#undef FLUSH
2306}
2307
2308/*
2309 * This is the console switching callback.
2310 *
2311 * Doing console switching in a process context allows
2312 * us to do the switches asynchronously (needed when we want
2313 * to switch due to a keyboard interrupt). Synchronization
2314 * with other console code and prevention of re-entrancy is
ac751efa 2315 * ensured with console_lock.
1da177e4 2316 */
65f27f38 2317static void console_callback(struct work_struct *ignored)
1da177e4 2318{
ac751efa 2319 console_lock();
1da177e4
LT		 2320
2321 if (want_console >= 0) {
2322 if (want_console != fg_console &&
2323 vc_cons_allocated(want_console)) {
2324 hide_cursor(vc_cons[fg_console].d);
2325 change_console(vc_cons[want_console].d);
2326 /* we only changed when the console had already
2327 been allocated - a new console is not created
2328 in an interrupt routine */
2329 }
2330 want_console = -1;
2331 }
2332 if (do_poke_blanked_console) { /* do not unblank for a LED change */
2333 do_poke_blanked_console = 0;
2334 poke_blanked_console();
2335 }
2336 if (scrollback_delta) {
2337 struct vc_data *vc = vc_cons[fg_console].d;
2338 clear_selection();
2339 if (vc->vc_mode == KD_TEXT)
2340 vc->vc_sw->con_scrolldelta(vc, scrollback_delta);
2341 scrollback_delta = 0;
2342 }
2343 if (blank_timer_expired) {
2344 do_blank_screen(0);
2345 blank_timer_expired = 0;
2346 }
b293d758 2347 notify_update(vc_cons[fg_console].d);
1da177e4 2348
ac751efa 2349 console_unlock();
1da177e4
LT		 2350}
2351
b257bc05 2352int set_console(int nr)
1da177e4 2353{
b257bc05
AJ		 2354 struct vc_data *vc = vc_cons[fg_console].d;
2355
2356 if (!vc_cons_allocated(nr) || vt_dont_switch ||
2357 (vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) {
2358
2359 /*
2360 * Console switch will fail in console_callback() or
2361 * change_console() so there is no point scheduling
2362 * the callback
2363 *
2364 * Existing set_console() users don't check the return
2365 * value so this shouldn't break anything
2366 */
2367 return -EINVAL;
2368 }
2369
1da177e4
LT		 2370 want_console = nr;
2371 schedule_console_callback();
b257bc05
AJ		 2372
2373 return 0;
1da177e4
LT		 2374}
2375
2376struct tty_driver *console_driver;
2377
2378#ifdef CONFIG_VT_CONSOLE
2379
5ada918b
BW		 2380/**
2381 * vt_kmsg_redirect() - Sets/gets the kernel message console
2382 * @new: The new virtual terminal number or -1 if the console should stay
2383 * unchanged
2384 *
2385 * By default, the kernel messages are always printed on the current virtual
2386 * console. However, the user may modify that default with the
2387 * TIOCL_SETKMSGREDIRECT ioctl call.
2388 *
2389 * This function sets the kernel message console to be @new. It returns the old
2390 * virtual console number. The virtual terminal number 0 (both as parameter and
2391 * return value) means no redirection (i.e. always printed on the currently
2392 * active console).
2393 *
2394 * The parameter -1 means that only the current console is returned, but the
2395 * value is not modified. You may use the macro vt_get_kmsg_redirect() in that
2396 * case to make the code more understandable.
2397 *
2398 * When the kernel is compiled without CONFIG_VT_CONSOLE, this function ignores
2399 * the parameter and always returns 0.
2400 */
2401int vt_kmsg_redirect(int new)
2402{
2403 static int kmsg_con;
2404
2405 if (new != -1)
2406 return xchg(&kmsg_con, new);
2407 else
2408 return kmsg_con;
2409}
2410
1da177e4
LT		 2411/*
2412 * Console on virtual terminal
2413 *
2414 * The console must be locked when we get here.
2415 */
2416
2417static void vt_console_print(struct console *co, const char *b, unsigned count)
2418{
2419 struct vc_data *vc = vc_cons[fg_console].d;
2420 unsigned char c;
b0940003 2421 static DEFINE_SPINLOCK(printing_lock);
1da177e4
LT		 2422 const ushort *start;
2423 ushort cnt = 0;
2424 ushort myx;
5ada918b 2425 int kmsg_console;
1da177e4
LT		 2426
2427 /* console busy or not yet initialized */
b0940003
NP		 2428 if (!printable)
2429 return;
2430 if (!spin_trylock(&printing_lock))
1da177e4
LT		 2431 return;
2432
5ada918b
BW		 2433 kmsg_console = vt_get_kmsg_redirect();
2434 if (kmsg_console && vc_cons_allocated(kmsg_console - 1))
2435 vc = vc_cons[kmsg_console - 1].d;
1da177e4
LT		 2436
2437 /* read `x' only after setting currcons properly (otherwise
2438 the `x' macro will read the x of the foreground console). */
2439 myx = vc->vc_x;
2440
2441 if (!vc_cons_allocated(fg_console)) {
2442 /* impossible */
2443 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2444 goto quit;
2445 }
2446
8fd4bd22 2447 if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc))
1da177e4
LT		 2448 goto quit;
2449
2450 /* undraw cursor first */
2451 if (IS_FG(vc))
2452 hide_cursor(vc);
2453
2454 start = (ushort *)vc->vc_pos;
2455
2456 /* Contrived structure to try to emulate original need_wrap behaviour
2457 * Problems caused when we have need_wrap set on '\n' character */
2458 while (count--) {
2459 c = *b++;
2460 if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) {
2461 if (cnt > 0) {
2462 if (CON_IS_VISIBLE(vc))
2463 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2464 vc->vc_x += cnt;
2465 if (vc->vc_need_wrap)
2466 vc->vc_x--;
2467 cnt = 0;
2468 }
2469 if (c == 8) { /* backspace */
2470 bs(vc);
2471 start = (ushort *)vc->vc_pos;
2472 myx = vc->vc_x;
2473 continue;
2474 }
2475 if (c != 13)
2476 lf(vc);
2477 cr(vc);
2478 start = (ushort *)vc->vc_pos;
2479 myx = vc->vc_x;
2480 if (c == 10 || c == 13)
2481 continue;
2482 }
2483 scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos);
b293d758 2484 notify_write(vc, c);
1da177e4
LT		 2485 cnt++;
2486 if (myx == vc->vc_cols - 1) {
2487 vc->vc_need_wrap = 1;
2488 continue;
2489 }
2490 vc->vc_pos += 2;
2491 myx++;
2492 }
2493 if (cnt > 0) {
2494 if (CON_IS_VISIBLE(vc))
2495 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2496 vc->vc_x += cnt;
2497 if (vc->vc_x == vc->vc_cols) {
2498 vc->vc_x--;
2499 vc->vc_need_wrap = 1;
2500 }
2501 }
2502 set_cursor(vc);
b293d758 2503 notify_update(vc);
1da177e4
LT		 2504
2505quit:
b0940003 2506 spin_unlock(&printing_lock);
1da177e4
LT		 2507}
2508
2509static struct tty_driver *vt_console_device(struct console *c, int *index)
2510{
2511 *index = c->index ? c->index-1 : fg_console;
2512 return console_driver;
2513}
2514
2515static struct console vt_console_driver = {
2516 .name = "tty",
2517 .write = vt_console_print,
2518 .device = vt_console_device,
2519 .unblank = unblank_screen,
2520 .flags = CON_PRINTBUFFER,
2521 .index = -1,
2522};
2523#endif
2524
2525/*
2526 * Handling of Linux-specific VC ioctls
2527 */
2528
2529/*
ac751efa 2530 * Generally a bit racy with respect to console_lock();.
1da177e4
LT		 2531 *
2532 * There are some functions which don't need it.
2533 *
2534 * There are some functions which can sleep for arbitrary periods
2535 * (paste_selection) but we don't need the lock there anyway.
2536 *
2537 * set_selection has locking, and definitely needs it
2538 */
2539
2540int tioclinux(struct tty_struct *tty, unsigned long arg)
2541{
2542 char type, data;
2543 char __user *p = (char __user *)arg;
2544 int lines;
2545 int ret;
2546
1da177e4
LT		 2547 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN))
2548 return -EPERM;
2549 if (get_user(type, p))
2550 return -EFAULT;
2551 ret = 0;
04f378b1 2552
1da177e4
LT		 2553 switch (type)
2554 {
2555 case TIOCL_SETSEL:
ac751efa 2556 console_lock();
1da177e4 2557 ret = set_selection((struct tiocl_selection __user *)(p+1), tty);
ac751efa 2558 console_unlock();
1da177e4
LT		 2559 break;
2560 case TIOCL_PASTESEL:
2561 ret = paste_selection(tty);
2562 break;
2563 case TIOCL_UNBLANKSCREEN:
ac751efa 2564 console_lock();
1da177e4 2565 unblank_screen();
ac751efa 2566 console_unlock();
1da177e4
LT		 2567 break;
2568 case TIOCL_SELLOADLUT:
5289475d 2569 console_lock();
1da177e4 2570 ret = sel_loadlut(p);
5289475d 2571 console_unlock();
1da177e4
LT		 2572 break;
2573 case TIOCL_GETSHIFTSTATE:
04f378b1 2574
1da177e4
LT		 2575 /*
2576 * Make it possible to react to Shift+Mousebutton.
2577 * Note that 'shift_state' is an undocumented
2578 * kernel-internal variable; programs not closely
2579 * related to the kernel should not use this.
2580 */
079c9534 2581 data = vt_get_shift_state();
1da177e4
LT		 2582 ret = __put_user(data, p);
2583 break;
2584 case TIOCL_GETMOUSEREPORTING:
20f62579 2585 console_lock(); /* May be overkill */
1da177e4 2586 data = mouse_reporting();
20f62579 2587 console_unlock();
1da177e4
LT		 2588 ret = __put_user(data, p);
2589 break;
2590 case TIOCL_SETVESABLANK:
20f62579 2591 console_lock();
403aac96 2592 ret = set_vesa_blanking(p);
20f62579 2593 console_unlock();
1da177e4 2594 break;
0ca07731 2595 case TIOCL_GETKMSGREDIRECT:
5ada918b 2596 data = vt_get_kmsg_redirect();
0ca07731
RW		 2597 ret = __put_user(data, p);
2598 break;
1da177e4
LT		 2599 case TIOCL_SETKMSGREDIRECT:
2600 if (!capable(CAP_SYS_ADMIN)) {
2601 ret = -EPERM;
2602 } else {
2603 if (get_user(data, p+1))
2604 ret = -EFAULT;
2605 else
5ada918b 2606 vt_kmsg_redirect(data);
1da177e4
LT		 2607 }
2608 break;
2609 case TIOCL_GETFGCONSOLE:
20f62579
AC		 2610 /* No locking needed as this is a transiently
2611 correct return anyway if the caller hasn't
2612 disabled switching */
1da177e4
LT		 2613 ret = fg_console;
2614 break;
2615 case TIOCL_SCROLLCONSOLE:
2616 if (get_user(lines, (s32 __user *)(p+4))) {
2617 ret = -EFAULT;
2618 } else {
20f62579
AC		 2619 /* Need the console lock here. Note that lots
2620 of other calls need fixing before the lock
2621 is actually useful ! */
2622 console_lock();
1da177e4 2623 scrollfront(vc_cons[fg_console].d, lines);
20f62579 2624 console_unlock();
1da177e4
LT		 2625 ret = 0;
2626 }
2627 break;
2628 case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
ac751efa 2629 console_lock();
1da177e4
LT		 2630 ignore_poke = 1;
2631 do_blank_screen(0);
ac751efa 2632 console_unlock();
1da177e4
LT		 2633 break;
2634 case TIOCL_BLANKEDSCREEN:
2635 ret = console_blanked;
2636 break;
2637 default:
2638 ret = -EINVAL;
2639 break;
2640 }
2641 return ret;
2642}
2643
2644/*
2645 * /dev/ttyN handling
2646 */
2647
2648static int con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2649{
2650 int retval;
2651
2652 retval = do_con_write(tty, buf, count);
2653 con_flush_chars(tty);
2654
2655 return retval;
2656}
2657
5d19f546 2658static int con_put_char(struct tty_struct *tty, unsigned char ch)
1da177e4
LT		 2659{
2660 if (in_interrupt())
5d19f546
AC		 2661 return 0; /* n_r3964 calls put_char() from interrupt context */
2662 return do_con_write(tty, &ch, 1);
1da177e4
LT		 2663}
2664
2665static int con_write_room(struct tty_struct *tty)
2666{
2667 if (tty->stopped)
2668 return 0;
a88a69c9 2669 return 32768; /* No limit, really; we're not buffering */
1da177e4
LT		 2670}
2671
2672static int con_chars_in_buffer(struct tty_struct *tty)
2673{
2674 return 0; /* we're not buffering */
2675}
2676
2677/*
2678 * con_throttle and con_unthrottle are only used for
2679 * paste_selection(), which has to stuff in a large number of
2680 * characters...
2681 */
2682static void con_throttle(struct tty_struct *tty)
2683{
2684}
2685
2686static void con_unthrottle(struct tty_struct *tty)
2687{
2688 struct vc_data *vc = tty->driver_data;
2689
2690 wake_up_interruptible(&vc->paste_wait);
2691}
2692
2693/*
2694 * Turn the Scroll-Lock LED on when the tty is stopped
2695 */
2696static void con_stop(struct tty_struct *tty)
2697{
2698 int console_num;
2699 if (!tty)
2700 return;
2701 console_num = tty->index;
2702 if (!vc_cons_allocated(console_num))
2703 return;
079c9534 2704 vt_kbd_con_stop(console_num);
1da177e4
LT		 2705}
2706
2707/*
2708 * Turn the Scroll-Lock LED off when the console is started
2709 */
2710static void con_start(struct tty_struct *tty)
2711{
2712 int console_num;
2713 if (!tty)
2714 return;
2715 console_num = tty->index;
2716 if (!vc_cons_allocated(console_num))
2717 return;
079c9534 2718 vt_kbd_con_start(console_num);
1da177e4
LT		 2719}
2720
2721static void con_flush_chars(struct tty_struct *tty)
2722{
2723 struct vc_data *vc;
2724
2725 if (in_interrupt()) /* from flush_to_ldisc */
2726 return;
2727
2728 /* if we race with con_close(), vt may be null */
ac751efa 2729 console_lock();
1da177e4
LT		 2730 vc = tty->driver_data;
2731 if (vc)
2732 set_cursor(vc);
ac751efa 2733 console_unlock();
1da177e4
LT		 2734}
2735
2736/*
2737 * Allocate the console screen memory.
2738 */
bc1e99d9 2739static int con_install(struct tty_driver *driver, struct tty_struct *tty)
1da177e4
LT		 2740{
2741 unsigned int currcons = tty->index;
bc1e99d9
JS		 2742 struct vc_data *vc;
2743 int ret;
1da177e4 2744
ac751efa 2745 console_lock();
bc1e99d9
JS		 2746 ret = vc_allocate(currcons);
2747 if (ret)
2748 goto unlock;
feebed65 2749
bc1e99d9 2750 vc = vc_cons[currcons].d;
1da177e4 2751
bc1e99d9
JS		 2752 /* Still being freed */
2753 if (vc->port.tty) {
2754 ret = -ERESTARTSYS;
2755 goto unlock;
2756 }
2757
2758 ret = tty_port_install(&vc->port, driver, tty);
2759 if (ret)
2760 goto unlock;
2761
2762 tty->driver_data = vc;
2763 vc->port.tty = tty;
2764
2765 if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
2766 tty->winsize.ws_row = vc_cons[currcons].d->vc_rows;
2767 tty->winsize.ws_col = vc_cons[currcons].d->vc_cols;
1da177e4 2768 }
bc1e99d9 2769 if (vc->vc_utf)
adc8d746 2770 tty->termios.c_iflag |= IUTF8;
bc1e99d9 2771 else
adc8d746 2772 tty->termios.c_iflag &= ~IUTF8;
bc1e99d9 2773unlock:
ac751efa 2774 console_unlock();
1da177e4
LT		 2775 return ret;
2776}
2777
bc1e99d9
JS		 2778static int con_open(struct tty_struct *tty, struct file *filp)
2779{
2780 /* everything done in install */
2781 return 0;
2782}
2783
2784
1da177e4
LT		 2785static void con_close(struct tty_struct *tty, struct file *filp)
2786{
feebed65
AC		 2787 /* Nothing to do - we defer to shutdown */
2788}
1da177e4 2789
feebed65
AC		 2790static void con_shutdown(struct tty_struct *tty)
2791{
2792 struct vc_data *vc = tty->driver_data;
2793 BUG_ON(vc == NULL);
ac751efa 2794 console_lock();
8ce73264 2795 vc->port.tty = NULL;
ac751efa 2796 console_unlock();
1da177e4
LT		 2797}
2798
3855ae1c 2799static int default_color = 7; /* white */
fa6ce9ab
JE		 2800static int default_italic_color = 2; // green (ASCII)
2801static int default_underline_color = 3; // cyan (ASCII)
3855ae1c 2802module_param_named(color, default_color, int, S_IRUGO | S_IWUSR);
fa6ce9ab
JE		 2803module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR);
2804module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR);
2805
1da177e4
LT		 2806static void vc_init(struct vc_data *vc, unsigned int rows,
2807 unsigned int cols, int do_clear)
2808{
2809 int j, k ;
2810
2811 vc->vc_cols = cols;
2812 vc->vc_rows = rows;
2813 vc->vc_size_row = cols << 1;
2814 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
2815
2816 set_origin(vc);
2817 vc->vc_pos = vc->vc_origin;
2818 reset_vc(vc);
2819 for (j=k=0; j<16; j++) {
2820 vc->vc_palette[k++] = default_red[j] ;
2821 vc->vc_palette[k++] = default_grn[j] ;
2822 vc->vc_palette[k++] = default_blu[j] ;
2823 }
3855ae1c 2824 vc->vc_def_color = default_color;
fa6ce9ab
JE		 2825 vc->vc_ulcolor = default_underline_color;
2826 vc->vc_itcolor = default_italic_color;
1da177e4
LT		 2827 vc->vc_halfcolor = 0x08; /* grey */
2828 init_waitqueue_head(&vc->paste_wait);
2829 reset_terminal(vc, do_clear);
2830}
2831
2832/*
2833 * This routine initializes console interrupts, and does nothing
2834 * else. If you want the screen to clear, call tty_write with
2835 * the appropriate escape-sequence.
2836 */
2837
2838static int __init con_init(void)
2839{
2840 const char *display_desc = NULL;
2841 struct vc_data *vc;
3e795de7 2842 unsigned int currcons = 0, i;
1da177e4 2843
ac751efa 2844 console_lock();
1da177e4
LT		 2845
2846 if (conswitchp)
2847 display_desc = conswitchp->con_startup();
2848 if (!display_desc) {
2849 fg_console = 0;
ac751efa 2850 console_unlock();
1da177e4
LT		 2851 return 0;
2852 }
2853
3e795de7
AD		 2854 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2855 struct con_driver *con_driver = &registered_con_driver[i];
2856
2857 if (con_driver->con == NULL) {
2858 con_driver->con = conswitchp;
2859 con_driver->desc = display_desc;
2860 con_driver->flag = CON_DRIVER_FLAG_INIT;
2861 con_driver->first = 0;
2862 con_driver->last = MAX_NR_CONSOLES - 1;
2863 break;
2864 }
2865 }
2866
2867 for (i = 0; i < MAX_NR_CONSOLES; i++)
2868 con_driver_map[i] = conswitchp;
2869
1da177e4
LT		 2870 if (blankinterval) {
2871 blank_state = blank_normal_wait;
f324edc8 2872 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
1da177e4
LT		 2873 }
2874
1da177e4 2875 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) {
a5f4f52e 2876 vc_cons[currcons].d = vc = kzalloc(sizeof(struct vc_data), GFP_NOWAIT);
7f1f86a0 2877 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
ff917ba4 2878 tty_port_init(&vc->port);
1da177e4 2879 visual_init(vc, currcons, 1);
a5f4f52e 2880 vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_NOWAIT);
1da177e4
LT		 2881 vc_init(vc, vc->vc_rows, vc->vc_cols,
2882 currcons || !vc->vc_sw->con_save_screen);
2883 }
2884 currcons = fg_console = 0;
2885 master_display_fg = vc = vc_cons[currcons].d;
2886 set_origin(vc);
2887 save_screen(vc);
2888 gotoxy(vc, vc->vc_x, vc->vc_y);
2889 csi_J(vc, 0);
2890 update_screen(vc);
5da527aa 2891 pr_info("Console: %s %s %dx%d\n",
1da177e4
LT		 2892 vc->vc_can_do_color ? "colour" : "mono",
2893 display_desc, vc->vc_cols, vc->vc_rows);
2894 printable = 1;
1da177e4 2895
ac751efa 2896 console_unlock();
1da177e4
LT		 2897
2898#ifdef CONFIG_VT_CONSOLE
2899 register_console(&vt_console_driver);
2900#endif
2901 return 0;
2902}
2903console_initcall(con_init);
2904
b68e31d0 2905static const struct tty_operations con_ops = {
bc1e99d9 2906 .install = con_install,
1da177e4
LT		 2907 .open = con_open,
2908 .close = con_close,
2909 .write = con_write,
2910 .write_room = con_write_room,
2911 .put_char = con_put_char,
2912 .flush_chars = con_flush_chars,
2913 .chars_in_buffer = con_chars_in_buffer,
2914 .ioctl = vt_ioctl,
e9216651
AB		 2915#ifdef CONFIG_COMPAT
2916 .compat_ioctl = vt_compat_ioctl,
2917#endif
1da177e4
LT		 2918 .stop = con_stop,
2919 .start = con_start,
2920 .throttle = con_throttle,
2921 .unthrottle = con_unthrottle,
8c9a9dd0 2922 .resize = vt_resize,
feebed65 2923 .shutdown = con_shutdown
1da177e4
LT		 2924};
2925
d81ed103
AC		 2926static struct cdev vc0_cdev;
2927
fbc92a34
KS		 2928static ssize_t show_tty_active(struct device *dev,
2929 struct device_attribute *attr, char *buf)
2930{
2931 return sprintf(buf, "tty%d\n", fg_console + 1);
2932}
2933static DEVICE_ATTR(active, S_IRUGO, show_tty_active, NULL);
2934
d81ed103 2935int __init vty_init(const struct file_operations *console_fops)
1da177e4 2936{
d81ed103
AC		 2937 cdev_init(&vc0_cdev, console_fops);
2938 if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) ||
2939 register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0)
2940 panic("Couldn't register /dev/tty0 driver\n");
fbc92a34
KS		 2941 tty0dev = device_create(tty_class, NULL, MKDEV(TTY_MAJOR, 0), NULL, "tty0");
2942 if (IS_ERR(tty0dev))
2943 tty0dev = NULL;
2944 else
a2a6a822 2945 WARN_ON(device_create_file(tty0dev, &dev_attr_active) < 0);
d81ed103 2946
1da177e4
LT		 2947 vcs_init();
2948
2949 console_driver = alloc_tty_driver(MAX_NR_CONSOLES);
2950 if (!console_driver)
2951 panic("Couldn't allocate console driver\n");
2f16669d 2952
1da177e4
LT		 2953 console_driver->name = "tty";
2954 console_driver->name_base = 1;
2955 console_driver->major = TTY_MAJOR;
2956 console_driver->minor_start = 1;
2957 console_driver->type = TTY_DRIVER_TYPE_CONSOLE;
2958 console_driver->init_termios = tty_std_termios;
c1236d31
ST		 2959 if (default_utf8)
2960 console_driver->init_termios.c_iflag |= IUTF8;
1da177e4
LT		 2961 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS;
2962 tty_set_operations(console_driver, &con_ops);
2963 if (tty_register_driver(console_driver))
2964 panic("Couldn't register console driver\n");
1da177e4
LT		 2965 kbd_init();
2966 console_map_init();
1da177e4
LT		 2967#ifdef CONFIG_MDA_CONSOLE
2968 mda_console_init();
2969#endif
2970 return 0;
2971}
2972
2973#ifndef VT_SINGLE_DRIVER
6db4063c
AD		 2974
2975static struct class *vtconsole_class;
2976
50e244cc 2977static int do_bind_con_driver(const struct consw *csw, int first, int last,
b7269dd2 2978 int deflt)
1da177e4 2979{
3e795de7
AD		 2980 struct module *owner = csw->owner;
2981 const char *desc = NULL;
2982 struct con_driver *con_driver;
2983 int i, j = -1, k = -1, retval = -ENODEV;
1da177e4 2984
1da177e4
LT		 2985 if (!try_module_get(owner))
2986 return -ENODEV;
2987
50e244cc 2988 WARN_CONSOLE_UNLOCKED();
1c8ce271 2989
3e795de7
AD		 2990 /* check if driver is registered */
2991 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2992 con_driver = &registered_con_driver[i];
2993
2994 if (con_driver->con == csw) {
2995 desc = con_driver->desc;
2996 retval = 0;
2997 break;
2998 }
2999 }
3000
3001 if (retval)
3002 goto err;
3003
3004 if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) {
3005 csw->con_startup();
3006 con_driver->flag |= CON_DRIVER_FLAG_INIT;
1da177e4 3007 }
1c8ce271 3008
1da177e4
LT		 3009 if (deflt) {
3010 if (conswitchp)
3011 module_put(conswitchp->owner);
1c8ce271 3012
1da177e4
LT		 3013 __module_get(owner);
3014 conswitchp = csw;
3015 }
3016
3e795de7
AD		 3017 first = max(first, con_driver->first);
3018 last = min(last, con_driver->last);
3019
1da177e4
LT		 3020 for (i = first; i <= last; i++) {
3021 int old_was_color;
3022 struct vc_data *vc = vc_cons[i].d;
3023
3024 if (con_driver_map[i])
3025 module_put(con_driver_map[i]->owner);
3026 __module_get(owner);
3027 con_driver_map[i] = csw;
3028
3029 if (!vc || !vc->vc_sw)
3030 continue;
3031
3032 j = i;
1c8ce271 3033
4ee1acce
DH		 3034 if (CON_IS_VISIBLE(vc)) {
3035 k = i;
1da177e4 3036 save_screen(vc);
4ee1acce
DH		 3037 }
3038
1da177e4
LT		 3039 old_was_color = vc->vc_can_do_color;
3040 vc->vc_sw->con_deinit(vc);
9fc2b2d0 3041 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
1da177e4 3042 visual_init(vc, i, 0);
1c8ce271 3043 set_origin(vc);
1da177e4
LT		 3044 update_attr(vc);
3045
3046 /* If the console changed between mono <-> color, then
3047 * the attributes in the screenbuf will be wrong. The
3048 * following resets all attributes to something sane.
3049 */
3050 if (old_was_color != vc->vc_can_do_color)
3051 clear_buffer_attributes(vc);
1da177e4 3052 }
4ee1acce 3053
1ffdda95 3054 pr_info("Console: switching ");
1da177e4
LT		 3055 if (!deflt)
3056 printk("consoles %d-%d ", first+1, last+1);
4ee1acce
DH		 3057 if (j >= 0) {
3058 struct vc_data *vc = vc_cons[j].d;
3059
1da177e4 3060 printk("to %s %s %dx%d\n",
4ee1acce
DH		 3061 vc->vc_can_do_color ? "colour" : "mono",
3062 desc, vc->vc_cols, vc->vc_rows);
3063
3064 if (k >= 0) {
3065 vc = vc_cons[k].d;
3066 update_screen(vc);
3067 }
3068 } else
1da177e4
LT		 3069 printk("to %s\n", desc);
3070
3e795de7
AD		 3071 retval = 0;
3072err:
1da177e4 3073 module_put(owner);
3e795de7
AD		 3074 return retval;
3075};
1da177e4 3076
50e244cc 3077
13ae6645
AD		 3078#ifdef CONFIG_VT_HW_CONSOLE_BINDING
3079static int con_is_graphics(const struct consw *csw, int first, int last)
3080{
3081 int i, retval = 0;
3082
3083 for (i = first; i <= last; i++) {
3084 struct vc_data *vc = vc_cons[i].d;
3085
3086 if (vc && vc->vc_mode == KD_GRAPHICS) {
3087 retval = 1;
3088 break;
3089 }
3090 }
3091
3092 return retval;
3093}
3094
e93a9a86
TI		 3095/* unlocked version of unbind_con_driver() */
3096int do_unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
1da177e4 3097{
3e795de7
AD		 3098 struct module *owner = csw->owner;
3099 const struct consw *defcsw = NULL;
3100 struct con_driver *con_driver = NULL, *con_back = NULL;
3101 int i, retval = -ENODEV;
1da177e4 3102
3e795de7
AD		 3103 if (!try_module_get(owner))
3104 return -ENODEV;
3105
e93a9a86 3106 WARN_CONSOLE_UNLOCKED();
3e795de7
AD		 3107
3108 /* check if driver is registered and if it is unbindable */
3109 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3110 con_driver = &registered_con_driver[i];
3111
3112 if (con_driver->con == csw &&
6db4063c 3113 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3e795de7
AD		 3114 retval = 0;
3115 break;
3116 }
3117 }
3118
e93a9a86 3119 if (retval)
3e795de7 3120 goto err;
3e795de7 3121
6db4063c
AD		 3122 retval = -ENODEV;
3123
3e795de7
AD		 3124 /* check if backup driver exists */
3125 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3126 con_back = &registered_con_driver[i];
3127
3128 if (con_back->con &&
6db4063c 3129 !(con_back->flag & CON_DRIVER_FLAG_MODULE)) {
3e795de7
AD		 3130 defcsw = con_back->con;
3131 retval = 0;
3132 break;
3133 }
3134 }
3135
e93a9a86 3136 if (retval)
3e795de7 3137 goto err;
3e795de7 3138
e93a9a86 3139 if (!con_is_bound(csw))
3e795de7 3140 goto err;
3e795de7
AD		 3141
3142 first = max(first, con_driver->first);
3143 last = min(last, con_driver->last);
3144
3145 for (i = first; i <= last; i++) {
1da177e4
LT		 3146 if (con_driver_map[i] == csw) {
3147 module_put(csw->owner);
3148 con_driver_map[i] = NULL;
3149 }
3e795de7
AD		 3150 }
3151
3152 if (!con_is_bound(defcsw)) {
6db4063c
AD		 3153 const struct consw *defconsw = conswitchp;
3154
3e795de7
AD		 3155 defcsw->con_startup();
3156 con_back->flag |= CON_DRIVER_FLAG_INIT;
6db4063c
AD		 3157 /*
3158 * vgacon may change the default driver to point
3159 * to dummycon, we restore it here...
3160 */
3161 conswitchp = defconsw;
3e795de7
AD		 3162 }
3163
3164 if (!con_is_bound(csw))
3165 con_driver->flag &= ~CON_DRIVER_FLAG_INIT;
3166
6db4063c 3167 /* ignore return value, binding should not fail */
50e244cc 3168 do_bind_con_driver(defcsw, first, last, deflt);
3e795de7
AD		 3169err:
3170 module_put(owner);
3171 return retval;
3172
3173}
e93a9a86 3174EXPORT_SYMBOL_GPL(do_unbind_con_driver);
3e795de7 3175
6db4063c
AD		 3176static int vt_bind(struct con_driver *con)
3177{
3178 const struct consw *defcsw = NULL, *csw = NULL;
3179 int i, more = 1, first = -1, last = -1, deflt = 0;
3180
3181 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3182 con_is_graphics(con->con, con->first, con->last))
3183 goto err;
3184
3185 csw = con->con;
3186
3187 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3188 struct con_driver *con = &registered_con_driver[i];
3189
3190 if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) {
3191 defcsw = con->con;
3192 break;
3193 }
3194 }
3195
3196 if (!defcsw)
3197 goto err;
3198
3199 while (more) {
3200 more = 0;
3201
3202 for (i = con->first; i <= con->last; i++) {
3203 if (con_driver_map[i] == defcsw) {
3204 if (first == -1)
3205 first = i;
3206 last = i;
3207 more = 1;
3208 } else if (first != -1)
3209 break;
3210 }
3211
3212 if (first == 0 && last == MAX_NR_CONSOLES -1)
3213 deflt = 1;
3214
c62a1e57
WY		 3215 if (first != -1) {
3216 console_lock();
3217 do_bind_con_driver(csw, first, last, deflt);
3218 console_unlock();
3219 }
6db4063c
AD		 3220
3221 first = -1;
3222 last = -1;
3223 deflt = 0;
3224 }
3225
3226err:
3227 return 0;
3228}
3229
3230static int vt_unbind(struct con_driver *con)
3231{
3232 const struct consw *csw = NULL;
3233 int i, more = 1, first = -1, last = -1, deflt = 0;
3234
3235 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3236 con_is_graphics(con->con, con->first, con->last))
3237 goto err;
3238
3239 csw = con->con;
3240
3241 while (more) {
3242 more = 0;
3243
3244 for (i = con->first; i <= con->last; i++) {
3245 if (con_driver_map[i] == csw) {
3246 if (first == -1)
3247 first = i;
3248 last = i;
3249 more = 1;
3250 } else if (first != -1)
3251 break;
3252 }
3253
3254 if (first == 0 && last == MAX_NR_CONSOLES -1)
3255 deflt = 1;
3256
618f2b90
WY		 3257 if (first != -1) {
3258 console_lock();
3259 do_unbind_con_driver(csw, first, last, deflt);
3260 console_unlock();
3261 }
6db4063c
AD		 3262
3263 first = -1;
3264 last = -1;
3265 deflt = 0;
3266 }
3267
3268err:
3269 return 0;
3270}
13ae6645
AD		 3271#else
3272static inline int vt_bind(struct con_driver *con)
3273{
3274 return 0;
3275}
3276static inline int vt_unbind(struct con_driver *con)
3277{
3278 return 0;
3279}
3280#endif /* CONFIG_VT_HW_CONSOLE_BINDING */
6db4063c 3281
805952a8 3282static ssize_t store_bind(struct device *dev, struct device_attribute *attr,
6db4063c
AD		 3283 const char *buf, size_t count)
3284{
805952a8 3285 struct con_driver *con = dev_get_drvdata(dev);
6db4063c
AD		 3286 int bind = simple_strtoul(buf, NULL, 0);
3287
3288 if (bind)
3289 vt_bind(con);
3290 else
3291 vt_unbind(con);
3292
3293 return count;
3294}
3295
805952a8
GKH		 3296static ssize_t show_bind(struct device *dev, struct device_attribute *attr,
3297 char *buf)
6db4063c 3298{
805952a8 3299 struct con_driver *con = dev_get_drvdata(dev);
6db4063c
AD		 3300 int bind = con_is_bound(con->con);
3301
3302 return snprintf(buf, PAGE_SIZE, "%i\n", bind);
3303}
3304
805952a8
GKH		 3305static ssize_t show_name(struct device *dev, struct device_attribute *attr,
3306 char *buf)
6db4063c 3307{
805952a8 3308 struct con_driver *con = dev_get_drvdata(dev);
6db4063c
AD		 3309
3310 return snprintf(buf, PAGE_SIZE, "%s %s\n",
3311 (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)",
3312 con->desc);
3313
3314}
3315
805952a8 3316static struct device_attribute device_attrs[] = {
6db4063c
AD		 3317 __ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind),
3318 __ATTR(name, S_IRUGO, show_name, NULL),
3319};
3320
805952a8 3321static int vtconsole_init_device(struct con_driver *con)
6db4063c
AD		 3322{
3323 int i;
928e964f 3324 int error = 0;
6db4063c 3325
928e964f 3326 con->flag |= CON_DRIVER_FLAG_ATTR;
805952a8
GKH		 3327 dev_set_drvdata(con->dev, con);
3328 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3329 error = device_create_file(con->dev, &device_attrs[i]);
928e964f
AD		 3330 if (error)
3331 break;
3332 }
6db4063c 3333
928e964f
AD		 3334 if (error) {
3335 while (--i >= 0)
805952a8 3336 device_remove_file(con->dev, &device_attrs[i]);
928e964f
AD		 3337 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3338 }
3339
3340 return error;
6db4063c
AD		 3341}
3342
805952a8 3343static void vtconsole_deinit_device(struct con_driver *con)
6db4063c
AD		 3344{
3345 int i;
3346
928e964f 3347 if (con->flag & CON_DRIVER_FLAG_ATTR) {
805952a8
GKH		 3348 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3349 device_remove_file(con->dev, &device_attrs[i]);
928e964f
AD		 3350 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3351 }
6db4063c
AD		 3352}
3353
3e795de7
AD		 3354/**
3355 * con_is_bound - checks if driver is bound to the console
3356 * @csw: console driver
3357 *
3358 * RETURNS: zero if unbound, nonzero if bound
3359 *
3360 * Drivers can call this and if zero, they should release
3361 * all resources allocated on con_startup()
3362 */
3363int con_is_bound(const struct consw *csw)
3364{
3365 int i, bound = 0;
3366
3367 for (i = 0; i < MAX_NR_CONSOLES; i++) {
3368 if (con_driver_map[i] == csw) {
3369 bound = 1;
3370 break;
3371 }
3372 }
3373
3374 return bound;
3375}
3376EXPORT_SYMBOL(con_is_bound);
3377
b45cfba4
JB		 3378/**
3379 * con_debug_enter - prepare the console for the kernel debugger
3380 * @sw: console driver
3381 *
3382 * Called when the console is taken over by the kernel debugger, this
3383 * function needs to save the current console state, then put the console
3384 * into a state suitable for the kernel debugger.
3385 *
3386 * RETURNS:
3387 * Zero on success, nonzero if a failure occurred when trying to prepare
3388 * the console for the debugger.
3389 */
3390int con_debug_enter(struct vc_data *vc)
3391{
3392 int ret = 0;
3393
3394 saved_fg_console = fg_console;
3395 saved_last_console = last_console;
3396 saved_want_console = want_console;
3397 saved_vc_mode = vc->vc_mode;
beed5336 3398 saved_console_blanked = console_blanked;
b45cfba4
JB		 3399 vc->vc_mode = KD_TEXT;
3400 console_blanked = 0;
3401 if (vc->vc_sw->con_debug_enter)
3402 ret = vc->vc_sw->con_debug_enter(vc);
81d44507
JW		 3403#ifdef CONFIG_KGDB_KDB
3404 /* Set the initial LINES variable if it is not already set */
3405 if (vc->vc_rows < 999) {
3406 int linecount;
3407 char lns[4];
3408 const char *setargs[3] = {
3409 "set",
3410 "LINES",
3411 lns,
3412 };
3413 if (kdbgetintenv(setargs[0], &linecount)) {
3414 snprintf(lns, 4, "%i", vc->vc_rows);
3415 kdb_set(2, setargs);
3416 }
3417 }
17b572e8
JW		 3418 if (vc->vc_cols < 999) {
3419 int colcount;
3420 char cols[4];
3421 const char *setargs[3] = {
3422 "set",
3423 "COLUMNS",
3424 cols,
3425 };
3426 if (kdbgetintenv(setargs[0], &colcount)) {
3427 snprintf(cols, 4, "%i", vc->vc_cols);
3428 kdb_set(2, setargs);
3429 }
3430 }
81d44507 3431#endif /* CONFIG_KGDB_KDB */
b45cfba4
JB		 3432 return ret;
3433}
3434EXPORT_SYMBOL_GPL(con_debug_enter);
3435
3436/**
3437 * con_debug_leave - restore console state
3438 * @sw: console driver
3439 *
3440 * Restore the console state to what it was before the kernel debugger
3441 * was invoked.
3442 *
3443 * RETURNS:
3444 * Zero on success, nonzero if a failure occurred when trying to restore
3445 * the console.
3446 */
3447int con_debug_leave(void)
3448{
3449 struct vc_data *vc;
3450 int ret = 0;
3451
3452 fg_console = saved_fg_console;
3453 last_console = saved_last_console;
3454 want_console = saved_want_console;
beed5336 3455 console_blanked = saved_console_blanked;
b45cfba4
JB		 3456 vc_cons[fg_console].d->vc_mode = saved_vc_mode;
3457
3458 vc = vc_cons[fg_console].d;
3459 if (vc->vc_sw->con_debug_leave)
3460 ret = vc->vc_sw->con_debug_leave(vc);
3461 return ret;
3462}
3463EXPORT_SYMBOL_GPL(con_debug_leave);
3464
50e244cc 3465static int do_register_con_driver(const struct consw *csw, int first, int last)
3e795de7
AD		 3466{
3467 struct module *owner = csw->owner;
3468 struct con_driver *con_driver;
3469 const char *desc;
3470 int i, retval = 0;
3471
50e244cc
AC		 3472 WARN_CONSOLE_UNLOCKED();
3473
3e795de7
AD		 3474 if (!try_module_get(owner))
3475 return -ENODEV;
3476
3e795de7
AD		 3477 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3478 con_driver = &registered_con_driver[i];
3479
3480 /* already registered */
3481 if (con_driver->con == csw)
c55c63c6 3482 retval = -EBUSY;
3e795de7
AD		 3483 }
3484
3485 if (retval)
3486 goto err;
3487
3488 desc = csw->con_startup();
3489
3490 if (!desc)
3491 goto err;
3492
3493 retval = -EINVAL;
3494
3495 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3496 con_driver = &registered_con_driver[i];
3497
3498 if (con_driver->con == NULL) {
3499 con_driver->con = csw;
3500 con_driver->desc = desc;
6db4063c
AD		 3501 con_driver->node = i;
3502 con_driver->flag = CON_DRIVER_FLAG_MODULE |
3e795de7
AD		 3503 CON_DRIVER_FLAG_INIT;
3504 con_driver->first = first;
3505 con_driver->last = last;
3506 retval = 0;
3507 break;
3508 }
3509 }
3510
6db4063c
AD		 3511 if (retval)
3512 goto err;
3513
d81ed103 3514 con_driver->dev = device_create(vtconsole_class, NULL,
47aa5793
GKH		 3515 MKDEV(0, con_driver->node),
3516 NULL, "vtcon%i",
3517 con_driver->node);
6db4063c 3518
805952a8
GKH		 3519 if (IS_ERR(con_driver->dev)) {
3520 printk(KERN_WARNING "Unable to create device for %s; "
6db4063c 3521 "errno = %ld\n", con_driver->desc,
805952a8
GKH		 3522 PTR_ERR(con_driver->dev));
3523 con_driver->dev = NULL;
6db4063c 3524 } else {
805952a8 3525 vtconsole_init_device(con_driver);
6db4063c 3526 }
928e964f 3527
3e795de7 3528err:
3e795de7
AD		 3529 module_put(owner);
3530 return retval;
3531}
50e244cc 3532
3e795de7
AD		 3533
3534/**
50539dd4 3535 * do_unregister_con_driver - unregister console driver from console layer
3e795de7
AD		 3536 * @csw: console driver
3537 *
3538 * DESCRIPTION: All drivers that registers to the console layer must
3539 * call this function upon exit, or if the console driver is in a state
3540 * where it won't be able to handle console services, such as the
3541 * framebuffer console without loaded framebuffer drivers.
3542 *
3543 * The driver must unbind first prior to unregistration.
3544 */
e93a9a86
TI		 3545int do_unregister_con_driver(const struct consw *csw)
3546{
3547 int i, retval = -ENODEV;
3e795de7
AD		 3548
3549 /* cannot unregister a bound driver */
3550 if (con_is_bound(csw))
3551 goto err;
3552
3553 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3554 struct con_driver *con_driver = &registered_con_driver[i];
3555
3556 if (con_driver->con == csw &&
6db4063c 3557 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
805952a8
GKH		 3558 vtconsole_deinit_device(con_driver);
3559 device_destroy(vtconsole_class,
3560 MKDEV(0, con_driver->node));
3e795de7
AD		 3561 con_driver->con = NULL;
3562 con_driver->desc = NULL;
805952a8 3563 con_driver->dev = NULL;
6db4063c 3564 con_driver->node = 0;
3e795de7
AD		 3565 con_driver->flag = 0;
3566 con_driver->first = 0;
3567 con_driver->last = 0;
3568 retval = 0;
3569 break;
3570 }
3571 }
3e795de7 3572err:
3e795de7
AD		 3573 return retval;
3574}
e93a9a86 3575EXPORT_SYMBOL_GPL(do_unregister_con_driver);
3e795de7
AD		 3576
3577/*
3578 * If we support more console drivers, this function is used
3579 * when a driver wants to take over some existing consoles
3580 * and become default driver for newly opened ones.
3581 *
155957f5 3582 * do_take_over_console is basically a register followed by unbind
50e244cc
AC		 3583 */
3584int do_take_over_console(const struct consw *csw, int first, int last, int deflt)
3585{
3586 int err;
3587
3588 err = do_register_con_driver(csw, first, last);
3589 /*
3590 * If we get an busy error we still want to bind the console driver
3591 * and return success, as we may have unbound the console driver
3592 * but not unregistered it.
3593 */
3594 if (err == -EBUSY)
3595 err = 0;
3596 if (!err)
3597 do_bind_con_driver(csw, first, last, deflt);
3598
3599 return err;
3600}
3601EXPORT_SYMBOL_GPL(do_take_over_console);
3602
3e795de7
AD		 3603
3604/*
3605 * give_up_console is a wrapper to unregister_con_driver. It will only
3606 * work if driver is fully unbound.
3607 */
3608void give_up_console(const struct consw *csw)
3609{
70125e76
WY		 3610 console_lock();
3611 do_unregister_con_driver(csw);
3612 console_unlock();
3e795de7
AD		 3613}
3614
6db4063c 3615static int __init vtconsole_class_init(void)
3e795de7 3616{
6db4063c 3617 int i;
3e795de7 3618
6db4063c
AD		 3619 vtconsole_class = class_create(THIS_MODULE, "vtconsole");
3620 if (IS_ERR(vtconsole_class)) {
3621 printk(KERN_WARNING "Unable to create vt console class; "
3622 "errno = %ld\n", PTR_ERR(vtconsole_class));
3623 vtconsole_class = NULL;
3624 }
3e795de7 3625
6db4063c 3626 /* Add system drivers to sysfs */
3e795de7
AD		 3627 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3628 struct con_driver *con = &registered_con_driver[i];
3629
805952a8 3630 if (con->con && !con->dev) {
d81ed103 3631 con->dev = device_create(vtconsole_class, NULL,
47aa5793
GKH		 3632 MKDEV(0, con->node),
3633 NULL, "vtcon%i",
3634 con->node);
6db4063c 3635
805952a8 3636 if (IS_ERR(con->dev)) {
6db4063c 3637 printk(KERN_WARNING "Unable to create "
805952a8
GKH		 3638 "device for %s; errno = %ld\n",
3639 con->desc, PTR_ERR(con->dev));
3640 con->dev = NULL;
6db4063c 3641 } else {
805952a8 3642 vtconsole_init_device(con);
6db4063c 3643 }
3e795de7 3644 }
3e795de7
AD		 3645 }
3646
3e795de7
AD		 3647 return 0;
3648}
6db4063c 3649postcore_initcall(vtconsole_class_init);
3e795de7 3650
1da177e4
LT		 3651#endif
3652
3653/*
3654 * Screen blanking
3655 */
3656
403aac96 3657static int set_vesa_blanking(char __user *p)
1da177e4 3658{
403aac96
YY		 3659 unsigned int mode;
3660
3661 if (get_user(mode, p + 1))
3662 return -EFAULT;
3663
3664 vesa_blank_mode = (mode < 4) ? mode : 0;
3665 return 0;
1da177e4
LT		 3666}
3667
1da177e4
LT		 3668void do_blank_screen(int entering_gfx)
3669{
3670 struct vc_data *vc = vc_cons[fg_console].d;
3671 int i;
3672
3673 WARN_CONSOLE_UNLOCKED();
3674
3675 if (console_blanked) {
3676 if (blank_state == blank_vesa_wait) {
3677 blank_state = blank_off;
d060a321 3678 vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0);
1da177e4
LT		 3679 }
3680 return;
3681 }
1da177e4
LT		 3682
3683 /* entering graphics mode? */
3684 if (entering_gfx) {
3685 hide_cursor(vc);
3686 save_screen(vc);
3687 vc->vc_sw->con_blank(vc, -1, 1);
3688 console_blanked = fg_console + 1;
b6e8f00f 3689 blank_state = blank_off;
1da177e4
LT		 3690 set_origin(vc);
3691 return;
3692 }
3693
b6e8f00f 3694 if (blank_state != blank_normal_wait)
3695 return;
3696 blank_state = blank_off;
3697
1da177e4
LT		 3698 /* don't blank graphics */
3699 if (vc->vc_mode != KD_TEXT) {
3700 console_blanked = fg_console + 1;
3701 return;
3702 }
3703
3704 hide_cursor(vc);
3705 del_timer_sync(&console_timer);
3706 blank_timer_expired = 0;
3707
3708 save_screen(vc);
3709 /* In case we need to reset origin, blanking hook returns 1 */
d060a321 3710 i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0);
1da177e4
LT		 3711 console_blanked = fg_console + 1;
3712 if (i)
3713 set_origin(vc);
3714
3715 if (console_blank_hook && console_blank_hook(1))
3716 return;
3717
d060a321 3718 if (vesa_off_interval && vesa_blank_mode) {
030babac 3719 blank_state = blank_vesa_wait;
1da177e4
LT		 3720 mod_timer(&console_timer, jiffies + vesa_off_interval);
3721 }
8b92e87d 3722 vt_event_post(VT_EVENT_BLANK, vc->vc_num, vc->vc_num);
1da177e4
LT		 3723}
3724EXPORT_SYMBOL(do_blank_screen);
3725
3726/*
3727 * Called by timer as well as from vt_console_driver
3728 */
3729void do_unblank_screen(int leaving_gfx)
3730{
3731 struct vc_data *vc;
3732
3733 /* This should now always be called from a "sane" (read: can schedule)
3734 * context for the sake of the low level drivers, except in the special
3735 * case of oops_in_progress
3736 */
3737 if (!oops_in_progress)
3738 might_sleep();
3739
3740 WARN_CONSOLE_UNLOCKED();
3741
3742 ignore_poke = 0;
3743 if (!console_blanked)
3744 return;
3745 if (!vc_cons_allocated(fg_console)) {
3746 /* impossible */
1ffdda95
MSB		 3747 pr_warning("unblank_screen: tty %d not allocated ??\n",
3748 fg_console+1);
1da177e4
LT		 3749 return;
3750 }
3751 vc = vc_cons[fg_console].d;
8fd4bd22
JB		 3752 /* Try to unblank in oops case too */
3753 if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc))
1da177e4
LT		 3754 return; /* but leave console_blanked != 0 */
3755
3756 if (blankinterval) {
f324edc8 3757 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
1da177e4
LT		 3758 blank_state = blank_normal_wait;
3759 }
3760
3761 console_blanked = 0;
8fd4bd22 3762 if (vc->vc_sw->con_blank(vc, 0, leaving_gfx) || vt_force_oops_output(vc))
1da177e4
LT		 3763 /* Low-level driver cannot restore -> do it ourselves */
3764 update_screen(vc);
3765 if (console_blank_hook)
3766 console_blank_hook(0);
3767 set_palette(vc);
3768 set_cursor(vc);
8b92e87d 3769 vt_event_post(VT_EVENT_UNBLANK, vc->vc_num, vc->vc_num);
1da177e4
LT		 3770}
3771EXPORT_SYMBOL(do_unblank_screen);
3772
3773/*
3774 * This is called by the outside world to cause a forced unblank, mostly for
3775 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
3776 * call it with 1 as an argument and so force a mode restore... that may kill
3777 * X or at least garbage the screen but would also make the Oops visible...
3778 */
3779void unblank_screen(void)
3780{
3781 do_unblank_screen(0);
3782}
3783
3784/*
70522e12 3785 * We defer the timer blanking to work queue so it can take the console mutex
1da177e4 3786 * (console operations can still happen at irq time, but only from printk which
70522e12 3787 * has the console mutex. Not perfect yet, but better than no locking
1da177e4
LT		 3788 */
3789static void blank_screen_t(unsigned long dummy)
3790{
cc63b1e1 3791 if (unlikely(!keventd_up())) {
f324edc8 3792 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
cc63b1e1
JB		 3793 return;
3794 }
1da177e4
LT		 3795 blank_timer_expired = 1;
3796 schedule_work(&console_work);
3797}
3798
3799void poke_blanked_console(void)
3800{
3801 WARN_CONSOLE_UNLOCKED();
3802
3803 /* Add this so we quickly catch whoever might call us in a non
3804 * safe context. Nowadays, unblank_screen() isn't to be called in
3805 * atomic contexts and is allowed to schedule (with the special case
3806 * of oops_in_progress, but that isn't of any concern for this
3807 * function. --BenH.
3808 */
3809 might_sleep();
3810
3811 /* This isn't perfectly race free, but a race here would be mostly harmless,
3812 * at worse, we'll do a spurrious blank and it's unlikely
3813 */
3814 del_timer(&console_timer);
3815 blank_timer_expired = 0;
3816
3817 if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS)
3818 return;
3819 if (console_blanked)
3820 unblank_screen();
3821 else if (blankinterval) {
f324edc8 3822 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
1da177e4
LT		 3823 blank_state = blank_normal_wait;
3824 }
3825}
3826
3827/*
3828 * Palettes
3829 */
3830
3831static void set_palette(struct vc_data *vc)
3832{
3833 WARN_CONSOLE_UNLOCKED();
3834
3835 if (vc->vc_mode != KD_GRAPHICS)
3836 vc->vc_sw->con_set_palette(vc, color_table);
3837}
3838
1da177e4
LT		 3839/*
3840 * Load palette into the DAC registers. arg points to a colour
3841 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
3842 */
3843
3844int con_set_cmap(unsigned char __user *arg)
3845{
871bdea6
MG		 3846 int i, j, k;
3847 unsigned char colormap[3*16];
3848
3849 if (copy_from_user(colormap, arg, sizeof(colormap)))
3850 return -EFAULT;
1da177e4 3851
ac751efa 3852 console_lock();
871bdea6
MG		 3853 for (i = k = 0; i < 16; i++) {
3854 default_red[i] = colormap[k++];
3855 default_grn[i] = colormap[k++];
3856 default_blu[i] = colormap[k++];
3857 }
3858 for (i = 0; i < MAX_NR_CONSOLES; i++) {
3859 if (!vc_cons_allocated(i))
3860 continue;
3861 for (j = k = 0; j < 16; j++) {
3862 vc_cons[i].d->vc_palette[k++] = default_red[j];
3863 vc_cons[i].d->vc_palette[k++] = default_grn[j];
3864 vc_cons[i].d->vc_palette[k++] = default_blu[j];
3865 }
3866 set_palette(vc_cons[i].d);
3867 }
ac751efa 3868 console_unlock();
1da177e4 3869
871bdea6 3870 return 0;
1da177e4
LT		 3871}
3872
3873int con_get_cmap(unsigned char __user *arg)
3874{
871bdea6
MG		 3875 int i, k;
3876 unsigned char colormap[3*16];
1da177e4 3877
ac751efa 3878 console_lock();
871bdea6
MG		 3879 for (i = k = 0; i < 16; i++) {
3880 colormap[k++] = default_red[i];
3881 colormap[k++] = default_grn[i];
3882 colormap[k++] = default_blu[i];
3883 }
ac751efa 3884 console_unlock();
1da177e4 3885
871bdea6
MG		 3886 if (copy_to_user(arg, colormap, sizeof(colormap)))
3887 return -EFAULT;
3888
3889 return 0;
1da177e4
LT		 3890}
3891
3892void reset_palette(struct vc_data *vc)
3893{
3894 int j, k;
3895 for (j=k=0; j<16; j++) {
3896 vc->vc_palette[k++] = default_red[j];
3897 vc->vc_palette[k++] = default_grn[j];
3898 vc->vc_palette[k++] = default_blu[j];
3899 }
3900 set_palette(vc);
3901}
3902
3903/*
3904 * Font switching
3905 *
3906 * Currently we only support fonts up to 32 pixels wide, at a maximum height
3907 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
3908 * depending on width) reserved for each character which is kinda wasty, but
3909 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
25985edc 3910 * is up to the actual low-level console-driver convert data into its favorite
1da177e4
LT		 3911 * format (maybe we should add a `fontoffset' field to the `display'
3912 * structure so we won't have to convert the fontdata all the time.
3913 * /Jes
3914 */
3915
3916#define max_font_size 65536
3917
3918static int con_font_get(struct vc_data *vc, struct console_font_op *op)
3919{
3920 struct console_font font;
3921 int rc = -EINVAL;
3922 int c;
3923
1da177e4
LT		 3924 if (op->data) {
3925 font.data = kmalloc(max_font_size, GFP_KERNEL);
3926 if (!font.data)
3927 return -ENOMEM;
3928 } else
3929 font.data = NULL;
3930
ac751efa 3931 console_lock();
edab558f
AC		 3932 if (vc->vc_mode != KD_TEXT)
3933 rc = -EINVAL;
3934 else if (vc->vc_sw->con_font_get)
1da177e4
LT		 3935 rc = vc->vc_sw->con_font_get(vc, &font);
3936 else
3937 rc = -ENOSYS;
ac751efa 3938 console_unlock();
1da177e4
LT		 3939
3940 if (rc)
3941 goto out;
3942
3943 c = (font.width+7)/8 * 32 * font.charcount;
04f378b1 3944
1da177e4
LT		 3945 if (op->data && font.charcount > op->charcount)
3946 rc = -ENOSPC;
3947 if (!(op->flags & KD_FONT_FLAG_OLD)) {
3948 if (font.width > op->width || font.height > op->height)
3949 rc = -ENOSPC;
3950 } else {
3951 if (font.width != 8)
3952 rc = -EIO;
3953 else if ((op->height && font.height > op->height) ||
3954 font.height > 32)
3955 rc = -ENOSPC;
3956 }
3957 if (rc)
3958 goto out;
3959
3960 op->height = font.height;
3961 op->width = font.width;
3962 op->charcount = font.charcount;
3963
3964 if (op->data && copy_to_user(op->data, font.data, c))
3965 rc = -EFAULT;
3966
3967out:
3968 kfree(font.data);
3969 return rc;
3970}
3971
3972static int con_font_set(struct vc_data *vc, struct console_font_op *op)
3973{
3974 struct console_font font;
3975 int rc = -EINVAL;
3976 int size;
3977
3978 if (vc->vc_mode != KD_TEXT)
3979 return -EINVAL;
3980 if (!op->data)
3981 return -EINVAL;
3982 if (op->charcount > 512)
3983 return -EINVAL;
3984 if (!op->height) { /* Need to guess font height [compat] */
3985 int h, i;
3986 u8 __user *charmap = op->data;
3987 u8 tmp;
3988
3989 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
3990 so that we can get rid of this soon */
3991 if (!(op->flags & KD_FONT_FLAG_OLD))
3992 return -EINVAL;
3993 for (h = 32; h > 0; h--)
3994 for (i = 0; i < op->charcount; i++) {
3995 if (get_user(tmp, &charmap[32*i+h-1]))
3996 return -EFAULT;
3997 if (tmp)
3998 goto nonzero;
3999 }
4000 return -EINVAL;
4001 nonzero:
4002 op->height = h;
4003 }
4004 if (op->width <= 0 || op->width > 32 || op->height > 32)
4005 return -EINVAL;
4006 size = (op->width+7)/8 * 32 * op->charcount;
4007 if (size > max_font_size)
4008 return -ENOSPC;
4009 font.charcount = op->charcount;
4010 font.height = op->height;
4011 font.width = op->width;
9b71ca20
JL		 4012 font.data = memdup_user(op->data, size);
4013 if (IS_ERR(font.data))
4014 return PTR_ERR(font.data);
ac751efa 4015 console_lock();
edab558f
AC		 4016 if (vc->vc_mode != KD_TEXT)
4017 rc = -EINVAL;
4018 else if (vc->vc_sw->con_font_set)
1da177e4
LT		 4019 rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
4020 else
4021 rc = -ENOSYS;
ac751efa 4022 console_unlock();
1da177e4
LT		 4023 kfree(font.data);
4024 return rc;
4025}
4026
4027static int con_font_default(struct vc_data *vc, struct console_font_op *op)
4028{
4029 struct console_font font = {.width = op->width, .height = op->height};
4030 char name[MAX_FONT_NAME];
4031 char *s = name;
4032 int rc;
4033
1da177e4
LT		 4034
4035 if (!op->data)
4036 s = NULL;
4037 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0)
4038 return -EFAULT;
4039 else
4040 name[MAX_FONT_NAME - 1] = 0;
4041
ac751efa 4042 console_lock();
edab558f
AC		 4043 if (vc->vc_mode != KD_TEXT) {
4044 console_unlock();
4045 return -EINVAL;
4046 }
1da177e4
LT		 4047 if (vc->vc_sw->con_font_default)
4048 rc = vc->vc_sw->con_font_default(vc, &font, s);
4049 else
4050 rc = -ENOSYS;
ac751efa 4051 console_unlock();
1da177e4
LT		 4052 if (!rc) {
4053 op->width = font.width;
4054 op->height = font.height;
4055 }
4056 return rc;
4057}
4058
4059static int con_font_copy(struct vc_data *vc, struct console_font_op *op)
4060{
4061 int con = op->height;
4062 int rc;
4063
1da177e4 4064
ac751efa 4065 console_lock();
edab558f
AC		 4066 if (vc->vc_mode != KD_TEXT)
4067 rc = -EINVAL;
4068 else if (!vc->vc_sw->con_font_copy)
1da177e4
LT		 4069 rc = -ENOSYS;
4070 else if (con < 0 || !vc_cons_allocated(con))
4071 rc = -ENOTTY;
4072 else if (con == vc->vc_num) /* nothing to do */
4073 rc = 0;
4074 else
4075 rc = vc->vc_sw->con_font_copy(vc, con);
ac751efa 4076 console_unlock();
1da177e4
LT		 4077 return rc;
4078}
4079
4080int con_font_op(struct vc_data *vc, struct console_font_op *op)
4081{
4082 switch (op->op) {
4083 case KD_FONT_OP_SET:
4084 return con_font_set(vc, op);
4085 case KD_FONT_OP_GET:
4086 return con_font_get(vc, op);
4087 case KD_FONT_OP_SET_DEFAULT:
4088 return con_font_default(vc, op);
4089 case KD_FONT_OP_COPY:
4090 return con_font_copy(vc, op);
4091 }
4092 return -ENOSYS;
4093}
4094
4095/*
4096 * Interface exported to selection and vcs.
4097 */
4098
4099/* used by selection */
4100u16 screen_glyph(struct vc_data *vc, int offset)
4101{
4102 u16 w = scr_readw(screenpos(vc, offset, 1));
4103 u16 c = w & 0xff;
4104
4105 if (w & vc->vc_hi_font_mask)
4106 c |= 0x100;
4107 return c;
4108}
f7511d5f 4109EXPORT_SYMBOL_GPL(screen_glyph);
1da177e4
LT		 4110
4111/* used by vcs - note the word offset */
4112unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed)
4113{
4114 return screenpos(vc, 2 * w_offset, viewed);
4115}
4116
4117void getconsxy(struct vc_data *vc, unsigned char *p)
4118{
4119 p[0] = vc->vc_x;
4120 p[1] = vc->vc_y;
4121}
4122
4123void putconsxy(struct vc_data *vc, unsigned char *p)
4124{
9477e260 4125 hide_cursor(vc);
1da177e4
LT		 4126 gotoxy(vc, p[0], p[1]);
4127 set_cursor(vc);
4128}
4129
4130u16 vcs_scr_readw(struct vc_data *vc, const u16 *org)
4131{
4132 if ((unsigned long)org == vc->vc_pos && softcursor_original != -1)
4133 return softcursor_original;
4134 return scr_readw(org);
4135}
4136
4137void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org)
4138{
4139 scr_writew(val, org);
4140 if ((unsigned long)org == vc->vc_pos) {
4141 softcursor_original = -1;
4142 add_softcursor(vc);
4143 }
4144}
4145
432c9ed2
NP		 4146void vcs_scr_updated(struct vc_data *vc)
4147{
4148 notify_update(vc);
4149}
4150
1da177e4
LT		 4151/*
4152 * Visible symbols for modules
4153 */
4154
4155EXPORT_SYMBOL(color_table);
4156EXPORT_SYMBOL(default_red);
4157EXPORT_SYMBOL(default_grn);
4158EXPORT_SYMBOL(default_blu);
4159EXPORT_SYMBOL(update_region);
4160EXPORT_SYMBOL(redraw_screen);
4161EXPORT_SYMBOL(vc_resize);
4162EXPORT_SYMBOL(fg_console);
4163EXPORT_SYMBOL(console_blank_hook);
4164EXPORT_SYMBOL(console_blanked);
4165EXPORT_SYMBOL(vc_cons);
f6c06b68 4166EXPORT_SYMBOL(global_cursor_default);
1da177e4 4167#ifndef VT_SINGLE_DRIVER
1da177e4
LT		 4168EXPORT_SYMBOL(give_up_console);
4169#endif
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