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Merge tag 'v3.10.108' into update
[GitHub/mt8127/android_kernel_alcatel_ttab.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);
cabab528 501 notify_update(vc);
1da177e4
LT		 502}
503
504/* used by selection: complement pointer position */
505void complement_pos(struct vc_data *vc, int offset)
506{
414edcd3 507 static int old_offset = -1;
1da177e4
LT		 508 static unsigned short old;
509 static unsigned short oldx, oldy;
510
511 WARN_CONSOLE_UNLOCKED();
512
414edcd3
AD		 513 if (old_offset != -1 && old_offset >= 0 &&
514 old_offset < vc->vc_screenbuf_size) {
515 scr_writew(old, screenpos(vc, old_offset, 1));
1da177e4
LT		 516 if (DO_UPDATE(vc))
517 vc->vc_sw->con_putc(vc, old, oldy, oldx);
cabab528 518 notify_update(vc);
1da177e4 519 }
414edcd3
AD		 520
521 old_offset = offset;
522
523 if (offset != -1 && offset >= 0 &&
524 offset < vc->vc_screenbuf_size) {
1da177e4 525 unsigned short new;
414edcd3 526 unsigned short *p;
1da177e4
LT		 527 p = screenpos(vc, offset, 1);
528 old = scr_readw(p);
529 new = old ^ vc->vc_complement_mask;
530 scr_writew(new, p);
531 if (DO_UPDATE(vc)) {
532 oldx = (offset >> 1) % vc->vc_cols;
533 oldy = (offset >> 1) / vc->vc_cols;
534 vc->vc_sw->con_putc(vc, new, oldy, oldx);
535 }
cabab528 536 notify_update(vc);
1da177e4
LT		 537 }
538}
539
540static void insert_char(struct vc_data *vc, unsigned int nr)
541{
81732c3b 542 unsigned short *p = (unsigned short *) vc->vc_pos;
1da177e4 543
a883b70d 544 scr_memmovew(p + nr, p, (vc->vc_cols - vc->vc_x - nr) * 2);
81732c3b 545 scr_memsetw(p, vc->vc_video_erase_char, nr * 2);
1da177e4 546 vc->vc_need_wrap = 0;
81732c3b
JFM		 547 if (DO_UPDATE(vc))
548 do_update_region(vc, (unsigned long) p,
b1a925f4 549 vc->vc_cols - vc->vc_x);
1da177e4
LT		 550}
551
552static void delete_char(struct vc_data *vc, unsigned int nr)
553{
81732c3b 554 unsigned short *p = (unsigned short *) vc->vc_pos;
1da177e4 555
b1a925f4 556 scr_memcpyw(p, p + nr, (vc->vc_cols - vc->vc_x - nr) * 2);
81732c3b
JFM		 557 scr_memsetw(p + vc->vc_cols - vc->vc_x - nr, vc->vc_video_erase_char,
558 nr * 2);
1da177e4 559 vc->vc_need_wrap = 0;
81732c3b
JFM		 560 if (DO_UPDATE(vc))
561 do_update_region(vc, (unsigned long) p,
b1a925f4 562 vc->vc_cols - vc->vc_x);
1da177e4
LT		 563}
564
565static int softcursor_original;
566
567static void add_softcursor(struct vc_data *vc)
568{
569 int i = scr_readw((u16 *) vc->vc_pos);
570 u32 type = vc->vc_cursor_type;
571
572 if (! (type & 0x10)) return;
573 if (softcursor_original != -1) return;
574 softcursor_original = i;
575 i |= ((type >> 8) & 0xff00 );
576 i ^= ((type) & 0xff00 );
577 if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000;
578 if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700;
579 scr_writew(i, (u16 *) vc->vc_pos);
580 if (DO_UPDATE(vc))
581 vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x);
582}
583
584static void hide_softcursor(struct vc_data *vc)
585{
586 if (softcursor_original != -1) {
587 scr_writew(softcursor_original, (u16 *)vc->vc_pos);
588 if (DO_UPDATE(vc))
589 vc->vc_sw->con_putc(vc, softcursor_original,
590 vc->vc_y, vc->vc_x);
591 softcursor_original = -1;
592 }
593}
594
595static void hide_cursor(struct vc_data *vc)
596{
597 if (vc == sel_cons)
598 clear_selection();
599 vc->vc_sw->con_cursor(vc, CM_ERASE);
600 hide_softcursor(vc);
601}
602
603static void set_cursor(struct vc_data *vc)
604{
605 if (!IS_FG(vc) || console_blanked ||
606 vc->vc_mode == KD_GRAPHICS)
607 return;
608 if (vc->vc_deccm) {
609 if (vc == sel_cons)
610 clear_selection();
611 add_softcursor(vc);
612 if ((vc->vc_cursor_type & 0x0f) != 1)
613 vc->vc_sw->con_cursor(vc, CM_DRAW);
614 } else
615 hide_cursor(vc);
616}
617
618static void set_origin(struct vc_data *vc)
619{
620 WARN_CONSOLE_UNLOCKED();
621
622 if (!CON_IS_VISIBLE(vc) ||
623 !vc->vc_sw->con_set_origin ||
624 !vc->vc_sw->con_set_origin(vc))
625 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
626 vc->vc_visible_origin = vc->vc_origin;
627 vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size;
628 vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x;
629}
630
631static inline void save_screen(struct vc_data *vc)
632{
633 WARN_CONSOLE_UNLOCKED();
634
635 if (vc->vc_sw->con_save_screen)
636 vc->vc_sw->con_save_screen(vc);
637}
638
639/*
640 * Redrawing of screen
641 */
642
2a248307 643void clear_buffer_attributes(struct vc_data *vc)
1da177e4
LT		 644{
645 unsigned short *p = (unsigned short *)vc->vc_origin;
646 int count = vc->vc_screenbuf_size / 2;
647 int mask = vc->vc_hi_font_mask | 0xff;
648
649 for (; count > 0; count--, p++) {
650 scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p);
651 }
652}
653
654void redraw_screen(struct vc_data *vc, int is_switch)
655{
656 int redraw = 0;
657
658 WARN_CONSOLE_UNLOCKED();
659
660 if (!vc) {
661 /* strange ... */
662 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
663 return;
664 }
665
666 if (is_switch) {
667 struct vc_data *old_vc = vc_cons[fg_console].d;
668 if (old_vc == vc)
669 return;
670 if (!CON_IS_VISIBLE(vc))
671 redraw = 1;
672 *vc->vc_display_fg = vc;
673 fg_console = vc->vc_num;
674 hide_cursor(old_vc);
675 if (!CON_IS_VISIBLE(old_vc)) {
676 save_screen(old_vc);
677 set_origin(old_vc);
678 }
fbc92a34
KS		 679 if (tty0dev)
680 sysfs_notify(&tty0dev->kobj, NULL, "active");
1da177e4
LT		 681 } else {
682 hide_cursor(vc);
683 redraw = 1;
684 }
685
686 if (redraw) {
687 int update;
688 int old_was_color = vc->vc_can_do_color;
689
690 set_origin(vc);
691 update = vc->vc_sw->con_switch(vc);
692 set_palette(vc);
693 /*
694 * If console changed from mono<->color, the best we can do
695 * is to clear the buffer attributes. As it currently stands,
696 * rebuilding new attributes from the old buffer is not doable
697 * without overly complex code.
698 */
699 if (old_was_color != vc->vc_can_do_color) {
700 update_attr(vc);
701 clear_buffer_attributes(vc);
702 }
8fd4bd22
JB		 703
704 /* Forcibly update if we're panicing */
705 if ((update && vc->vc_mode != KD_GRAPHICS) ||
706 vt_force_oops_output(vc))
1da177e4
LT		 707 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
708 }
709 set_cursor(vc);
710 if (is_switch) {
711 set_leds();
712 compute_shiftstate();
8182ec49 713 notify_update(vc);
1da177e4
LT		 714 }
715}
716
717/*
718 * Allocation, freeing and resizing of VTs.
719 */
720
721int vc_cons_allocated(unsigned int i)
722{
723 return (i < MAX_NR_CONSOLES && vc_cons[i].d);
724}
725
726static void visual_init(struct vc_data *vc, int num, int init)
727{
728 /* ++Geert: vc->vc_sw->con_init determines console size */
729 if (vc->vc_sw)
730 module_put(vc->vc_sw->owner);
731 vc->vc_sw = conswitchp;
732#ifndef VT_SINGLE_DRIVER
733 if (con_driver_map[num])
734 vc->vc_sw = con_driver_map[num];
735#endif
736 __module_get(vc->vc_sw->owner);
737 vc->vc_num = num;
738 vc->vc_display_fg = &master_display_fg;
739 vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir;
740 vc->vc_uni_pagedir = 0;
741 vc->vc_hi_font_mask = 0;
742 vc->vc_complement_mask = 0;
743 vc->vc_can_do_color = 0;
8fd4bd22 744 vc->vc_panic_force_write = false;
1da177e4
LT		 745 vc->vc_sw->con_init(vc, init);
746 if (!vc->vc_complement_mask)
747 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
748 vc->vc_s_complement_mask = vc->vc_complement_mask;
749 vc->vc_size_row = vc->vc_cols << 1;
750 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
751}
752
753int vc_allocate(unsigned int currcons) /* return 0 on success */
754{
755 WARN_CONSOLE_UNLOCKED();
756
757 if (currcons >= MAX_NR_CONSOLES)
758 return -ENXIO;
759 if (!vc_cons[currcons].d) {
760 struct vc_data *vc;
b293d758 761 struct vt_notifier_param param;
1da177e4
LT		 762
763 /* prevent users from taking too much memory */
764 if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE))
765 return -EPERM;
766
767 /* due to the granularity of kmalloc, we waste some memory here */
768 /* the alloc is done in two steps, to optimize the common situation
769 of a 25x80 console (structsize=216, screenbuf_size=4000) */
770 /* although the numbers above are not valid since long ago, the
771 point is still up-to-date and the comment still has its value
772 even if only as a historical artifact. --mj, July 1998 */
b293d758 773 param.vc = vc = kzalloc(sizeof(struct vc_data), GFP_KERNEL);
1da177e4
LT		 774 if (!vc)
775 return -ENOMEM;
1da177e4 776 vc_cons[currcons].d = vc;
ff917ba4 777 tty_port_init(&vc->port);
c2c88f10 778 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
1da177e4
LT		 779 visual_init(vc, currcons, 1);
780 if (!*vc->vc_uni_pagedir_loc)
781 con_set_default_unimap(vc);
5c9228f0 782 vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL);
1da177e4
LT		 783 if (!vc->vc_screenbuf) {
784 kfree(vc);
785 vc_cons[currcons].d = NULL;
786 return -ENOMEM;
787 }
f6c06b68
MG		 788
789 /* If no drivers have overridden us and the user didn't pass a
790 boot option, default to displaying the cursor */
791 if (global_cursor_default == -1)
792 global_cursor_default = 1;
793
1da177e4 794 vc_init(vc, vc->vc_rows, vc->vc_cols, 1);
4995f8ef 795 vcs_make_sysfs(currcons);
b293d758 796 atomic_notifier_call_chain(&vt_notifier_list, VT_ALLOCATE, &param);
1da177e4
LT		 797 }
798 return 0;
799}
800
e400b6ec
AD		 801static inline int resize_screen(struct vc_data *vc, int width, int height,
802 int user)
1da177e4
LT		 803{
804 /* Resizes the resolution of the display adapater */
805 int err = 0;
806
807 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize)
e400b6ec
AD		 808 err = vc->vc_sw->con_resize(vc, width, height, user);
809
1da177e4
LT		 810 return err;
811}
812
813/*
814 * Change # of rows and columns (0 means unchanged/the size of fg_console)
815 * [this is to be used together with some user program
816 * like resize that changes the hardware videomode]
817 */
818#define VC_RESIZE_MAXCOL (32767)
819#define VC_RESIZE_MAXROW (32767)
8c9a9dd0
AC		 820
821/**
822 * vc_do_resize - resizing method for the tty
823 * @tty: tty being resized
824 * @real_tty: real tty (different to tty if a pty/tty pair)
825 * @vc: virtual console private data
826 * @cols: columns
827 * @lines: lines
828 *
829 * Resize a virtual console, clipping according to the actual constraints.
830 * If the caller passes a tty structure then update the termios winsize
3ad2f3fb 831 * information and perform any necessary signal handling.
8c9a9dd0
AC		 832 *
833 * Caller must hold the console semaphore. Takes the termios mutex and
834 * ctrl_lock of the tty IFF a tty is passed.
835 */
836
fc6f6238
AC		 837static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc,
838 unsigned int cols, unsigned int lines)
1da177e4
LT		 839{
840 unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0;
9e0ba741 841 unsigned long end;
f2ee4ae8 842 unsigned int old_rows, old_row_size;
1da177e4 843 unsigned int new_cols, new_rows, new_row_size, new_screen_size;
9e0ba741 844 unsigned int user;
1da177e4
LT		 845 unsigned short *newscreen;
846
847 WARN_CONSOLE_UNLOCKED();
848
849 if (!vc)
850 return -ENXIO;
851
e400b6ec
AD		 852 user = vc->vc_resize_user;
853 vc->vc_resize_user = 0;
854
1da177e4
LT		 855 if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW)
856 return -EINVAL;
857
858 new_cols = (cols ? cols : vc->vc_cols);
859 new_rows = (lines ? lines : vc->vc_rows);
860 new_row_size = new_cols << 1;
861 new_screen_size = new_row_size * new_rows;
862
863 if (new_cols == vc->vc_cols && new_rows == vc->vc_rows)
864 return 0;
865
35059401
DV		 866 if (new_screen_size > (4 << 20))
867 return -EINVAL;
5cbded58 868 newscreen = kmalloc(new_screen_size, GFP_USER);
1da177e4
LT		 869 if (!newscreen)
870 return -ENOMEM;
871
5812a9bc
SD		 872 if (vc == sel_cons)
873 clear_selection();
874
1da177e4 875 old_rows = vc->vc_rows;
1da177e4 876 old_row_size = vc->vc_size_row;
1da177e4 877
e400b6ec 878 err = resize_screen(vc, new_cols, new_rows, user);
1da177e4
LT		 879 if (err) {
880 kfree(newscreen);
881 return err;
882 }
883
884 vc->vc_rows = new_rows;
885 vc->vc_cols = new_cols;
886 vc->vc_size_row = new_row_size;
887 vc->vc_screenbuf_size = new_screen_size;
888
889 rlth = min(old_row_size, new_row_size);
890 rrem = new_row_size - rlth;
891 old_origin = vc->vc_origin;
892 new_origin = (long) newscreen;
893 new_scr_end = new_origin + new_screen_size;
3b41dc1a
AD		 894
895 if (vc->vc_y > new_rows) {
896 if (old_rows - vc->vc_y < new_rows) {
897 /*
898 * Cursor near the bottom, copy contents from the
899 * bottom of buffer
900 */
901 old_origin += (old_rows - new_rows) * old_row_size;
3b41dc1a
AD		 902 } else {
903 /*
904 * Cursor is in no man's land, copy 1/2 screenful
905 * from the top and bottom of cursor position
906 */
907 old_origin += (vc->vc_y - new_rows/2) * old_row_size;
3b41dc1a 908 }
9fc2b2d0
FJ		 909 }
910
911 end = old_origin + old_row_size * min(old_rows, new_rows);
1da177e4
LT		 912
913 update_attr(vc);
914
3b41dc1a
AD		 915 while (old_origin < end) {
916 scr_memcpyw((unsigned short *) new_origin,
917 (unsigned short *) old_origin, rlth);
1da177e4 918 if (rrem)
3b41dc1a
AD		 919 scr_memsetw((void *)(new_origin + rlth),
920 vc->vc_video_erase_char, rrem);
1da177e4
LT		 921 old_origin += old_row_size;
922 new_origin += new_row_size;
923 }
924 if (new_scr_end > new_origin)
3b41dc1a
AD		 925 scr_memsetw((void *)new_origin, vc->vc_video_erase_char,
926 new_scr_end - new_origin);
5c9228f0 927 kfree(vc->vc_screenbuf);
1da177e4 928 vc->vc_screenbuf = newscreen;
1da177e4
LT		 929 vc->vc_screenbuf_size = new_screen_size;
930 set_origin(vc);
931
932 /* do part of a reset_terminal() */
933 vc->vc_top = 0;
934 vc->vc_bottom = vc->vc_rows;
935 gotoxy(vc, vc->vc_x, vc->vc_y);
936 save_cur(vc);
937
8c9a9dd0
AC		 938 if (tty) {
939 /* Rewrite the requested winsize data with the actual
940 resulting sizes */
941 struct winsize ws;
1da177e4
LT		 942 memset(&ws, 0, sizeof(ws));
943 ws.ws_row = vc->vc_rows;
944 ws.ws_col = vc->vc_cols;
945 ws.ws_ypixel = vc->vc_scan_lines;
fc6f6238 946 tty_do_resize(tty, &ws);
1da177e4
LT		 947 }
948
949 if (CON_IS_VISIBLE(vc))
950 update_screen(vc);
8b92e87d 951 vt_event_post(VT_EVENT_RESIZE, vc->vc_num, vc->vc_num);
1da177e4
LT		 952 return err;
953}
954
8c9a9dd0
AC		 955/**
956 * vc_resize - resize a VT
957 * @vc: virtual console
958 * @cols: columns
959 * @rows: rows
960 *
961 * Resize a virtual console as seen from the console end of things. We
962 * use the common vc_do_resize methods to update the structures. The
963 * caller must hold the console sem to protect console internals and
8ce73264 964 * vc->port.tty
8c9a9dd0
AC		 965 */
966
967int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int rows)
968{
8ce73264 969 return vc_do_resize(vc->port.tty, vc, cols, rows);
8c9a9dd0
AC		 970}
971
972/**
973 * vt_resize - resize a VT
974 * @tty: tty to resize
8c9a9dd0
AC		 975 * @ws: winsize attributes
976 *
977 * Resize a virtual terminal. This is called by the tty layer as we
978 * register our own handler for resizing. The mutual helper does all
979 * the actual work.
980 *
981 * Takes the console sem and the called methods then take the tty
982 * termios_mutex and the tty ctrl_lock in that order.
983 */
da2bdf9a 984static int vt_resize(struct tty_struct *tty, struct winsize *ws)
ca9bda00 985{
8c9a9dd0
AC		 986 struct vc_data *vc = tty->driver_data;
987 int ret;
ca9bda00 988
ac751efa 989 console_lock();
fc6f6238 990 ret = vc_do_resize(tty, vc, ws->ws_col, ws->ws_row);
ac751efa 991 console_unlock();
8c9a9dd0 992 return ret;
ca9bda00 993}
1da177e4 994
421b40a6 995struct vc_data *vc_deallocate(unsigned int currcons)
1da177e4 996{
421b40a6
PH		 997 struct vc_data *vc = NULL;
998
1da177e4
LT		 999 WARN_CONSOLE_UNLOCKED();
1000
1001 if (vc_cons_allocated(currcons)) {
421b40a6 1002 struct vt_notifier_param param;
4995f8ef 1003
421b40a6 1004 param.vc = vc = vc_cons[currcons].d;
b293d758 1005 atomic_notifier_call_chain(&vt_notifier_list, VT_DEALLOCATE, &param);
4995f8ef 1006 vcs_remove_sysfs(currcons);
1da177e4 1007 vc->vc_sw->con_deinit(vc);
bde0d2c9 1008 put_pid(vc->vt_pid);
d459ec0b 1009 module_put(vc->vc_sw->owner);
5c9228f0 1010 kfree(vc->vc_screenbuf);
1da177e4
LT		 1011 vc_cons[currcons].d = NULL;
1012 }
421b40a6 1013 return vc;
1da177e4
LT		 1014}
1015
1016/*
1017 * VT102 emulator
1018 */
1019
079c9534
AC		 1020#define set_kbd(vc, x) vt_set_kbd_mode_bit((vc)->vc_num, (x))
1021#define clr_kbd(vc, x) vt_clr_kbd_mode_bit((vc)->vc_num, (x))
1022#define is_kbd(vc, x) vt_get_kbd_mode_bit((vc)->vc_num, (x))
1da177e4
LT		 1023
1024#define decarm VC_REPEAT
1025#define decckm VC_CKMODE
1026#define kbdapplic VC_APPLIC
1027#define lnm VC_CRLF
1028
1029/*
1030 * this is what the terminal answers to a ESC-Z or csi0c query.
1031 */
1032#define VT100ID "\033[?1;2c"
1033#define VT102ID "\033[?6c"
1034
1035unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7,
1036 8,12,10,14, 9,13,11,15 };
1037
1038/* the default colour table, for VGA+ colour systems */
1039int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
1040 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
1041int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
1042 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
1043int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
1044 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
1045
1c2bbe6a
JE		 1046module_param_array(default_red, int, NULL, S_IRUGO | S_IWUSR);
1047module_param_array(default_grn, int, NULL, S_IRUGO | S_IWUSR);
1048module_param_array(default_blu, int, NULL, S_IRUGO | S_IWUSR);
1049
1da177e4
LT		 1050/*
1051 * gotoxy() must verify all boundaries, because the arguments
1052 * might also be negative. If the given position is out of
1053 * bounds, the cursor is placed at the nearest margin.
1054 */
1055static void gotoxy(struct vc_data *vc, int new_x, int new_y)
1056{
1057 int min_y, max_y;
1058
1059 if (new_x < 0)
1060 vc->vc_x = 0;
1061 else {
1062 if (new_x >= vc->vc_cols)
1063 vc->vc_x = vc->vc_cols - 1;
1064 else
1065 vc->vc_x = new_x;
1066 }
1067
1068 if (vc->vc_decom) {
1069 min_y = vc->vc_top;
1070 max_y = vc->vc_bottom;
1071 } else {
1072 min_y = 0;
1073 max_y = vc->vc_rows;
1074 }
1075 if (new_y < min_y)
1076 vc->vc_y = min_y;
1077 else if (new_y >= max_y)
1078 vc->vc_y = max_y - 1;
1079 else
1080 vc->vc_y = new_y;
1081 vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1);
1082 vc->vc_need_wrap = 0;
1083}
1084
1085/* for absolute user moves, when decom is set */
1086static void gotoxay(struct vc_data *vc, int new_x, int new_y)
1087{
1088 gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y);
1089}
1090
1091void scrollback(struct vc_data *vc, int lines)
1092{
1093 if (!lines)
1094 lines = vc->vc_rows / 2;
1095 scrolldelta(-lines);
1096}
1097
1098void scrollfront(struct vc_data *vc, int lines)
1099{
1100 if (!lines)
1101 lines = vc->vc_rows / 2;
1102 scrolldelta(lines);
1103}
1104
1105static void lf(struct vc_data *vc)
1106{
1107 /* don't scroll if above bottom of scrolling region, or
1108 * if below scrolling region
1109 */
1110 if (vc->vc_y + 1 == vc->vc_bottom)
1111 scrup(vc, vc->vc_top, vc->vc_bottom, 1);
1112 else if (vc->vc_y < vc->vc_rows - 1) {
1113 vc->vc_y++;
1114 vc->vc_pos += vc->vc_size_row;
1115 }
1116 vc->vc_need_wrap = 0;
b293d758 1117 notify_write(vc, '\n');
1da177e4
LT		 1118}
1119
1120static void ri(struct vc_data *vc)
1121{
1122 /* don't scroll if below top of scrolling region, or
1123 * if above scrolling region
1124 */
1125 if (vc->vc_y == vc->vc_top)
1126 scrdown(vc, vc->vc_top, vc->vc_bottom, 1);
1127 else if (vc->vc_y > 0) {
1128 vc->vc_y--;
1129 vc->vc_pos -= vc->vc_size_row;
1130 }
1131 vc->vc_need_wrap = 0;
1132}
1133
1134static inline void cr(struct vc_data *vc)
1135{
1136 vc->vc_pos -= vc->vc_x << 1;
1137 vc->vc_need_wrap = vc->vc_x = 0;
b293d758 1138 notify_write(vc, '\r');
1da177e4
LT		 1139}
1140
1141static inline void bs(struct vc_data *vc)
1142{
1143 if (vc->vc_x) {
1144 vc->vc_pos -= 2;
1145 vc->vc_x--;
1146 vc->vc_need_wrap = 0;
b293d758 1147 notify_write(vc, '\b');
1da177e4
LT		 1148 }
1149}
1150
1151static inline void del(struct vc_data *vc)
1152{
1153 /* ignored */
1154}
1155
1156static void csi_J(struct vc_data *vc, int vpar)
1157{
1158 unsigned int count;
1159 unsigned short * start;
1160
1161 switch (vpar) {
1162 case 0: /* erase from cursor to end of display */
1163 count = (vc->vc_scr_end - vc->vc_pos) >> 1;
1164 start = (unsigned short *)vc->vc_pos;
1da177e4
LT		 1165 break;
1166 case 1: /* erase from start to cursor */
1167 count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1;
1168 start = (unsigned short *)vc->vc_origin;
1da177e4 1169 break;
f8df13e0
PP		 1170 case 3: /* erase scroll-back buffer (and whole display) */
1171 scr_memsetw(vc->vc_screenbuf, vc->vc_video_erase_char,
902fd8d5 1172 vc->vc_screenbuf_size);
f8df13e0 1173 set_origin(vc);
27f0831c
PP		 1174 if (CON_IS_VISIBLE(vc))
1175 update_screen(vc);
f8df13e0 1176 /* fall through */
1da177e4
LT		 1177 case 2: /* erase whole display */
1178 count = vc->vc_cols * vc->vc_rows;
1179 start = (unsigned short *)vc->vc_origin;
1da177e4
LT		 1180 break;
1181 default:
1182 return;
1183 }
1184 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
81732c3b
JFM		 1185 if (DO_UPDATE(vc))
1186 do_update_region(vc, (unsigned long) start, count);
1da177e4
LT		 1187 vc->vc_need_wrap = 0;
1188}
1189
1190static void csi_K(struct vc_data *vc, int vpar)
1191{
1192 unsigned int count;
1193 unsigned short * start;
1194
1195 switch (vpar) {
1196 case 0: /* erase from cursor to end of line */
1197 count = vc->vc_cols - vc->vc_x;
1198 start = (unsigned short *)vc->vc_pos;
1da177e4
LT		 1199 break;
1200 case 1: /* erase from start of line to cursor */
1201 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1202 count = vc->vc_x + 1;
1da177e4
LT		 1203 break;
1204 case 2: /* erase whole line */
1205 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1206 count = vc->vc_cols;
1da177e4
LT		 1207 break;
1208 default:
1209 return;
1210 }
1211 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1212 vc->vc_need_wrap = 0;
81732c3b
JFM		 1213 if (DO_UPDATE(vc))
1214 do_update_region(vc, (unsigned long) start, count);
1da177e4
LT		 1215}
1216
1217static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */
1218{ /* not vt100? */
1219 int count;
1220
1221 if (!vpar)
1222 vpar++;
1223 count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar;
1224
1225 scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count);
1226 if (DO_UPDATE(vc))
1227 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count);
1228 vc->vc_need_wrap = 0;
1229}
1230
1231static void default_attr(struct vc_data *vc)
1232{
1233 vc->vc_intensity = 1;
fa6ce9ab 1234 vc->vc_italic = 0;
1da177e4
LT		 1235 vc->vc_underline = 0;
1236 vc->vc_reverse = 0;
1237 vc->vc_blink = 0;
1238 vc->vc_color = vc->vc_def_color;
1239}
1240
ac751efa 1241/* console_lock is held */
1da177e4
LT		 1242static void csi_m(struct vc_data *vc)
1243{
1244 int i;
1245
1246 for (i = 0; i <= vc->vc_npar; i++)
1247 switch (vc->vc_par[i]) {
1248 case 0: /* all attributes off */
1249 default_attr(vc);
1250 break;
1251 case 1:
1252 vc->vc_intensity = 2;
1253 break;
1254 case 2:
1255 vc->vc_intensity = 0;
1256 break;
fa6ce9ab
JE		 1257 case 3:
1258 vc->vc_italic = 1;
1259 break;
1da177e4
LT		 1260 case 4:
1261 vc->vc_underline = 1;
1262 break;
1263 case 5:
1264 vc->vc_blink = 1;
1265 break;
1266 case 7:
1267 vc->vc_reverse = 1;
1268 break;
1269 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1270 * Select primary font, don't display
1271 * control chars if defined, don't set
1272 * bit 8 on output.
1273 */
1274 vc->vc_translate = set_translate(vc->vc_charset == 0
1275 ? vc->vc_G0_charset
1276 : vc->vc_G1_charset, vc);
1277 vc->vc_disp_ctrl = 0;
1278 vc->vc_toggle_meta = 0;
1279 break;
1280 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1281 * Select first alternate font, lets
1282 * chars < 32 be displayed as ROM chars.
1283 */
1284 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1285 vc->vc_disp_ctrl = 1;
1286 vc->vc_toggle_meta = 0;
1287 break;
1288 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1289 * Select second alternate font, toggle
1290 * high bit before displaying as ROM char.
1291 */
1292 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1293 vc->vc_disp_ctrl = 1;
1294 vc->vc_toggle_meta = 1;
1295 break;
1296 case 21:
1297 case 22:
1298 vc->vc_intensity = 1;
1299 break;
fa6ce9ab
JE		 1300 case 23:
1301 vc->vc_italic = 0;
1302 break;
1da177e4
LT		 1303 case 24:
1304 vc->vc_underline = 0;
1305 break;
1306 case 25:
1307 vc->vc_blink = 0;
1308 break;
1309 case 27:
1310 vc->vc_reverse = 0;
1311 break;
1312 case 38: /* ANSI X3.64-1979 (SCO-ish?)
1313 * Enables underscore, white foreground
1314 * with white underscore (Linux - use
1315 * default foreground).
1316 */
1317 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1318 vc->vc_underline = 1;
1319 break;
1320 case 39: /* ANSI X3.64-1979 (SCO-ish?)
1321 * Disable underline option.
1322 * Reset colour to default? It did this
1323 * before...
1324 */
1325 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1326 vc->vc_underline = 0;
1327 break;
1328 case 49:
1329 vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f);
1330 break;
1331 default:
1332 if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37)
1333 vc->vc_color = color_table[vc->vc_par[i] - 30]
1334 | (vc->vc_color & 0xf0);
1335 else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47)
1336 vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4)
1337 | (vc->vc_color & 0x0f);
1338 break;
1339 }
1340 update_attr(vc);
1341}
1342
6732c8bb 1343static void respond_string(const char *p, struct tty_port *port)
1da177e4
LT		 1344{
1345 while (*p) {
6732c8bb 1346 tty_insert_flip_char(port, *p, 0);
1da177e4
LT		 1347 p++;
1348 }
6732c8bb 1349 tty_schedule_flip(port);
1da177e4
LT		 1350}
1351
1352static void cursor_report(struct vc_data *vc, struct tty_struct *tty)
1353{
1354 char buf[40];
1355
1356 sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1);
6732c8bb 1357 respond_string(buf, tty->port);
1da177e4
LT		 1358}
1359
1360static inline void status_report(struct tty_struct *tty)
1361{
6732c8bb 1362 respond_string("\033[0n", tty->port); /* Terminal ok */
1da177e4
LT		 1363}
1364
6732c8bb 1365static inline void respond_ID(struct tty_struct *tty)
1da177e4 1366{
6732c8bb 1367 respond_string(VT102ID, tty->port);
1da177e4
LT		 1368}
1369
1370void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry)
1371{
1372 char buf[8];
1373
1374 sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx),
1375 (char)('!' + mry));
6732c8bb 1376 respond_string(buf, tty->port);
1da177e4
LT		 1377}
1378
1379/* invoked via ioctl(TIOCLINUX) and through set_selection */
1380int mouse_reporting(void)
1381{
1382 return vc_cons[fg_console].d->vc_report_mouse;
1383}
1384
ac751efa 1385/* console_lock is held */
1da177e4
LT		 1386static void set_mode(struct vc_data *vc, int on_off)
1387{
1388 int i;
1389
1390 for (i = 0; i <= vc->vc_npar; i++)
1391 if (vc->vc_ques) {
1392 switch(vc->vc_par[i]) { /* DEC private modes set/reset */
1393 case 1: /* Cursor keys send ^[Ox/^[[x */
1394 if (on_off)
1395 set_kbd(vc, decckm);
1396 else
1397 clr_kbd(vc, decckm);
1398 break;
1399 case 3: /* 80/132 mode switch unimplemented */
1400 vc->vc_deccolm = on_off;
1401#if 0
1402 vc_resize(deccolm ? 132 : 80, vc->vc_rows);
1403 /* this alone does not suffice; some user mode
1404 utility has to change the hardware regs */
1405#endif
1406 break;
1407 case 5: /* Inverted screen on/off */
1408 if (vc->vc_decscnm != on_off) {
1409 vc->vc_decscnm = on_off;
1410 invert_screen(vc, 0, vc->vc_screenbuf_size, 0);
1411 update_attr(vc);
1412 }
1413 break;
1414 case 6: /* Origin relative/absolute */
1415 vc->vc_decom = on_off;
1416 gotoxay(vc, 0, 0);
1417 break;
1418 case 7: /* Autowrap on/off */
1419 vc->vc_decawm = on_off;
1420 break;
1421 case 8: /* Autorepeat on/off */
1422 if (on_off)
1423 set_kbd(vc, decarm);
1424 else
1425 clr_kbd(vc, decarm);
1426 break;
1427 case 9:
1428 vc->vc_report_mouse = on_off ? 1 : 0;
1429 break;
1430 case 25: /* Cursor on/off */
1431 vc->vc_deccm = on_off;
1432 break;
1433 case 1000:
1434 vc->vc_report_mouse = on_off ? 2 : 0;
1435 break;
1436 }
1437 } else {
1438 switch(vc->vc_par[i]) { /* ANSI modes set/reset */
1439 case 3: /* Monitor (display ctrls) */
1440 vc->vc_disp_ctrl = on_off;
1441 break;
1442 case 4: /* Insert Mode on/off */
1443 vc->vc_decim = on_off;
1444 break;
1445 case 20: /* Lf, Enter == CrLf/Lf */
1446 if (on_off)
1447 set_kbd(vc, lnm);
1448 else
1449 clr_kbd(vc, lnm);
1450 break;
1451 }
1452 }
1453}
1454
ac751efa 1455/* console_lock is held */
1da177e4
LT		 1456static void setterm_command(struct vc_data *vc)
1457{
1458 switch(vc->vc_par[0]) {
1459 case 1: /* set color for underline mode */
1460 if (vc->vc_can_do_color &&
1461 vc->vc_par[1] < 16) {
1462 vc->vc_ulcolor = color_table[vc->vc_par[1]];
1463 if (vc->vc_underline)
1464 update_attr(vc);
1465 }
1466 break;
1467 case 2: /* set color for half intensity mode */
1468 if (vc->vc_can_do_color &&
1469 vc->vc_par[1] < 16) {
1470 vc->vc_halfcolor = color_table[vc->vc_par[1]];
1471 if (vc->vc_intensity == 0)
1472 update_attr(vc);
1473 }
1474 break;
1475 case 8: /* store colors as defaults */
1476 vc->vc_def_color = vc->vc_attr;
1477 if (vc->vc_hi_font_mask == 0x100)
1478 vc->vc_def_color >>= 1;
1479 default_attr(vc);
1480 update_attr(vc);
1481 break;
1482 case 9: /* set blanking interval */
f324edc8 1483 blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60;
1da177e4
LT		 1484 poke_blanked_console();
1485 break;
1486 case 10: /* set bell frequency in Hz */
1487 if (vc->vc_npar >= 1)
1488 vc->vc_bell_pitch = vc->vc_par[1];
1489 else
1490 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1491 break;
1492 case 11: /* set bell duration in msec */
1493 if (vc->vc_npar >= 1)
1494 vc->vc_bell_duration = (vc->vc_par[1] < 2000) ?
1495 vc->vc_par[1] * HZ / 1000 : 0;
1496 else
1497 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1498 break;
1499 case 12: /* bring specified console to the front */
1500 if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1))
1501 set_console(vc->vc_par[1] - 1);
1502 break;
1503 case 13: /* unblank the screen */
1504 poke_blanked_console();
1505 break;
1506 case 14: /* set vesa powerdown interval */
1507 vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1508 break;
1509 case 15: /* activate the previous console */
1510 set_console(last_console);
1511 break;
1512 }
1513}
1514
ac751efa 1515/* console_lock is held */
1da177e4
LT		 1516static void csi_at(struct vc_data *vc, unsigned int nr)
1517{
1518 if (nr > vc->vc_cols - vc->vc_x)
1519 nr = vc->vc_cols - vc->vc_x;
1520 else if (!nr)
1521 nr = 1;
1522 insert_char(vc, nr);
1523}
1524
ac751efa 1525/* console_lock is held */
1da177e4
LT		 1526static void csi_L(struct vc_data *vc, unsigned int nr)
1527{
1528 if (nr > vc->vc_rows - vc->vc_y)
1529 nr = vc->vc_rows - vc->vc_y;
1530 else if (!nr)
1531 nr = 1;
1532 scrdown(vc, vc->vc_y, vc->vc_bottom, nr);
1533 vc->vc_need_wrap = 0;
1534}
1535
ac751efa 1536/* console_lock is held */
1da177e4
LT		 1537static void csi_P(struct vc_data *vc, unsigned int nr)
1538{
1539 if (nr > vc->vc_cols - vc->vc_x)
1540 nr = vc->vc_cols - vc->vc_x;
1541 else if (!nr)
1542 nr = 1;
1543 delete_char(vc, nr);
1544}
1545
ac751efa 1546/* console_lock is held */
1da177e4
LT		 1547static void csi_M(struct vc_data *vc, unsigned int nr)
1548{
1549 if (nr > vc->vc_rows - vc->vc_y)
1550 nr = vc->vc_rows - vc->vc_y;
1551 else if (!nr)
1552 nr=1;
1553 scrup(vc, vc->vc_y, vc->vc_bottom, nr);
1554 vc->vc_need_wrap = 0;
1555}
1556
ac751efa 1557/* console_lock is held (except via vc_init->reset_terminal */
1da177e4
LT		 1558static void save_cur(struct vc_data *vc)
1559{
1560 vc->vc_saved_x = vc->vc_x;
1561 vc->vc_saved_y = vc->vc_y;
1562 vc->vc_s_intensity = vc->vc_intensity;
fa6ce9ab 1563 vc->vc_s_italic = vc->vc_italic;
1da177e4
LT		 1564 vc->vc_s_underline = vc->vc_underline;
1565 vc->vc_s_blink = vc->vc_blink;
1566 vc->vc_s_reverse = vc->vc_reverse;
1567 vc->vc_s_charset = vc->vc_charset;
1568 vc->vc_s_color = vc->vc_color;
1569 vc->vc_saved_G0 = vc->vc_G0_charset;
1570 vc->vc_saved_G1 = vc->vc_G1_charset;
1571}
1572
ac751efa 1573/* console_lock is held */
1da177e4
LT		 1574static void restore_cur(struct vc_data *vc)
1575{
1576 gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y);
1577 vc->vc_intensity = vc->vc_s_intensity;
fa6ce9ab 1578 vc->vc_italic = vc->vc_s_italic;
1da177e4
LT		 1579 vc->vc_underline = vc->vc_s_underline;
1580 vc->vc_blink = vc->vc_s_blink;
1581 vc->vc_reverse = vc->vc_s_reverse;
1582 vc->vc_charset = vc->vc_s_charset;
1583 vc->vc_color = vc->vc_s_color;
1584 vc->vc_G0_charset = vc->vc_saved_G0;
1585 vc->vc_G1_charset = vc->vc_saved_G1;
1586 vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc);
1587 update_attr(vc);
1588 vc->vc_need_wrap = 0;
1589}
1590
1591enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey,
1592 EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd,
1593 ESpalette };
1594
ac751efa 1595/* console_lock is held (except via vc_init()) */
1da177e4
LT		 1596static void reset_terminal(struct vc_data *vc, int do_clear)
1597{
1598 vc->vc_top = 0;
1599 vc->vc_bottom = vc->vc_rows;
1600 vc->vc_state = ESnormal;
1601 vc->vc_ques = 0;
1602 vc->vc_translate = set_translate(LAT1_MAP, vc);
1603 vc->vc_G0_charset = LAT1_MAP;
1604 vc->vc_G1_charset = GRAF_MAP;
1605 vc->vc_charset = 0;
1606 vc->vc_need_wrap = 0;
1607 vc->vc_report_mouse = 0;
042f10ec 1608 vc->vc_utf = default_utf8;
1da177e4
LT		 1609 vc->vc_utf_count = 0;
1610
1611 vc->vc_disp_ctrl = 0;
1612 vc->vc_toggle_meta = 0;
1613
1614 vc->vc_decscnm = 0;
1615 vc->vc_decom = 0;
1616 vc->vc_decawm = 1;
f6c06b68 1617 vc->vc_deccm = global_cursor_default;
1da177e4
LT		 1618 vc->vc_decim = 0;
1619
079c9534 1620 vt_reset_keyboard(vc->vc_num);
1da177e4 1621
9ea9a886 1622 vc->vc_cursor_type = cur_default;
1da177e4
LT		 1623 vc->vc_complement_mask = vc->vc_s_complement_mask;
1624
1625 default_attr(vc);
1626 update_attr(vc);
1627
1628 vc->vc_tab_stop[0] = 0x01010100;
1629 vc->vc_tab_stop[1] =
1630 vc->vc_tab_stop[2] =
1631 vc->vc_tab_stop[3] =
a564738c
WK		 1632 vc->vc_tab_stop[4] =
1633 vc->vc_tab_stop[5] =
1634 vc->vc_tab_stop[6] =
1635 vc->vc_tab_stop[7] = 0x01010101;
1da177e4
LT		 1636
1637 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1638 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1639
1640 gotoxy(vc, 0, 0);
1641 save_cur(vc);
1642 if (do_clear)
1643 csi_J(vc, 2);
1644}
1645
ac751efa 1646/* console_lock is held */
1da177e4
LT		 1647static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
1648{
1649 /*
1650 * Control characters can be used in the _middle_
1651 * of an escape sequence.
1652 */
1653 switch (c) {
1654 case 0:
1655 return;
1656 case 7:
1657 if (vc->vc_bell_duration)
1658 kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration);
1659 return;
1660 case 8:
1661 bs(vc);
1662 return;
1663 case 9:
1664 vc->vc_pos -= (vc->vc_x << 1);
1665 while (vc->vc_x < vc->vc_cols - 1) {
1666 vc->vc_x++;
1667 if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31)))
1668 break;
1669 }
1670 vc->vc_pos += (vc->vc_x << 1);
b293d758 1671 notify_write(vc, '\t');
1da177e4
LT		 1672 return;
1673 case 10: case 11: case 12:
1674 lf(vc);
1675 if (!is_kbd(vc, lnm))
1676 return;
1677 case 13:
1678 cr(vc);
1679 return;
1680 case 14:
1681 vc->vc_charset = 1;
1682 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1683 vc->vc_disp_ctrl = 1;
1684 return;
1685 case 15:
1686 vc->vc_charset = 0;
1687 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1688 vc->vc_disp_ctrl = 0;
1689 return;
1690 case 24: case 26:
1691 vc->vc_state = ESnormal;
1692 return;
1693 case 27:
1694 vc->vc_state = ESesc;
1695 return;
1696 case 127:
1697 del(vc);
1698 return;
1699 case 128+27:
1700 vc->vc_state = ESsquare;
1701 return;
1702 }
1703 switch(vc->vc_state) {
1704 case ESesc:
1705 vc->vc_state = ESnormal;
1706 switch (c) {
1707 case '[':
1708 vc->vc_state = ESsquare;
1709 return;
1710 case ']':
1711 vc->vc_state = ESnonstd;
1712 return;
1713 case '%':
1714 vc->vc_state = ESpercent;
1715 return;
1716 case 'E':
1717 cr(vc);
1718 lf(vc);
1719 return;
1720 case 'M':
1721 ri(vc);
1722 return;
1723 case 'D':
1724 lf(vc);
1725 return;
1726 case 'H':
1727 vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31));
1728 return;
1729 case 'Z':
1730 respond_ID(tty);
1731 return;
1732 case '7':
1733 save_cur(vc);
1734 return;
1735 case '8':
1736 restore_cur(vc);
1737 return;
1738 case '(':
1739 vc->vc_state = ESsetG0;
1740 return;
1741 case ')':
1742 vc->vc_state = ESsetG1;
1743 return;
1744 case '#':
1745 vc->vc_state = EShash;
1746 return;
1747 case 'c':
1748 reset_terminal(vc, 1);
1749 return;
1750 case '>': /* Numeric keypad */
1751 clr_kbd(vc, kbdapplic);
1752 return;
1753 case '=': /* Appl. keypad */
1754 set_kbd(vc, kbdapplic);
1755 return;
1756 }
1757 return;
1758 case ESnonstd:
1759 if (c=='P') { /* palette escape sequence */
1760 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1761 vc->vc_par[vc->vc_npar] = 0;
1762 vc->vc_npar = 0;
1763 vc->vc_state = ESpalette;
1764 return;
1765 } else if (c=='R') { /* reset palette */
1766 reset_palette(vc);
1767 vc->vc_state = ESnormal;
1768 } else
1769 vc->vc_state = ESnormal;
1770 return;
1771 case ESpalette:
74c807ce
AS		 1772 if (isxdigit(c)) {
1773 vc->vc_par[vc->vc_npar++] = hex_to_bin(c);
1da177e4
LT		 1774 if (vc->vc_npar == 7) {
1775 int i = vc->vc_par[0] * 3, j = 1;
1776 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1777 vc->vc_palette[i++] += vc->vc_par[j++];
1778 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1779 vc->vc_palette[i++] += vc->vc_par[j++];
1780 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1781 vc->vc_palette[i] += vc->vc_par[j];
1782 set_palette(vc);
1783 vc->vc_state = ESnormal;
1784 }
1785 } else
1786 vc->vc_state = ESnormal;
1787 return;
1788 case ESsquare:
1789 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1790 vc->vc_par[vc->vc_npar] = 0;
1791 vc->vc_npar = 0;
1792 vc->vc_state = ESgetpars;
1793 if (c == '[') { /* Function key */
1794 vc->vc_state=ESfunckey;
1795 return;
1796 }
1797 vc->vc_ques = (c == '?');
1798 if (vc->vc_ques)
1799 return;
1800 case ESgetpars:
1801 if (c == ';' && vc->vc_npar < NPAR - 1) {
1802 vc->vc_npar++;
1803 return;
1804 } else if (c>='0' && c<='9') {
1805 vc->vc_par[vc->vc_npar] *= 10;
1806 vc->vc_par[vc->vc_npar] += c - '0';
1807 return;
1808 } else
1809 vc->vc_state = ESgotpars;
1810 case ESgotpars:
1811 vc->vc_state = ESnormal;
1812 switch(c) {
1813 case 'h':
1814 set_mode(vc, 1);
1815 return;
1816 case 'l':
1817 set_mode(vc, 0);
1818 return;
1819 case 'c':
1820 if (vc->vc_ques) {
1821 if (vc->vc_par[0])
1822 vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16);
1823 else
9ea9a886 1824 vc->vc_cursor_type = cur_default;
1da177e4
LT		 1825 return;
1826 }
1827 break;
1828 case 'm':
1829 if (vc->vc_ques) {
1830 clear_selection();
1831 if (vc->vc_par[0])
1832 vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1];
1833 else
1834 vc->vc_complement_mask = vc->vc_s_complement_mask;
1835 return;
1836 }
1837 break;
1838 case 'n':
1839 if (!vc->vc_ques) {
1840 if (vc->vc_par[0] == 5)
1841 status_report(tty);
1842 else if (vc->vc_par[0] == 6)
1843 cursor_report(vc, tty);
1844 }
1845 return;
1846 }
1847 if (vc->vc_ques) {
1848 vc->vc_ques = 0;
1849 return;
1850 }
1851 switch(c) {
1852 case 'G': case '`':
1853 if (vc->vc_par[0])
1854 vc->vc_par[0]--;
1855 gotoxy(vc, vc->vc_par[0], vc->vc_y);
1856 return;
1857 case 'A':
1858 if (!vc->vc_par[0])
1859 vc->vc_par[0]++;
1860 gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]);
1861 return;
1862 case 'B': case 'e':
1863 if (!vc->vc_par[0])
1864 vc->vc_par[0]++;
1865 gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]);
1866 return;
1867 case 'C': case 'a':
1868 if (!vc->vc_par[0])
1869 vc->vc_par[0]++;
1870 gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y);
1871 return;
1872 case 'D':
1873 if (!vc->vc_par[0])
1874 vc->vc_par[0]++;
1875 gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y);
1876 return;
1877 case 'E':
1878 if (!vc->vc_par[0])
1879 vc->vc_par[0]++;
1880 gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]);
1881 return;
1882 case 'F':
1883 if (!vc->vc_par[0])
1884 vc->vc_par[0]++;
1885 gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]);
1886 return;
1887 case 'd':
1888 if (vc->vc_par[0])
1889 vc->vc_par[0]--;
1890 gotoxay(vc, vc->vc_x ,vc->vc_par[0]);
1891 return;
1892 case 'H': case 'f':
1893 if (vc->vc_par[0])
1894 vc->vc_par[0]--;
1895 if (vc->vc_par[1])
1896 vc->vc_par[1]--;
1897 gotoxay(vc, vc->vc_par[1], vc->vc_par[0]);
1898 return;
1899 case 'J':
1900 csi_J(vc, vc->vc_par[0]);
1901 return;
1902 case 'K':
1903 csi_K(vc, vc->vc_par[0]);
1904 return;
1905 case 'L':
1906 csi_L(vc, vc->vc_par[0]);
1907 return;
1908 case 'M':
1909 csi_M(vc, vc->vc_par[0]);
1910 return;
1911 case 'P':
1912 csi_P(vc, vc->vc_par[0]);
1913 return;
1914 case 'c':
1915 if (!vc->vc_par[0])
1916 respond_ID(tty);
1917 return;
1918 case 'g':
1919 if (!vc->vc_par[0])
1920 vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31));
1921 else if (vc->vc_par[0] == 3) {
1922 vc->vc_tab_stop[0] =
1923 vc->vc_tab_stop[1] =
1924 vc->vc_tab_stop[2] =
1925 vc->vc_tab_stop[3] =
a564738c
WK		 1926 vc->vc_tab_stop[4] =
1927 vc->vc_tab_stop[5] =
1928 vc->vc_tab_stop[6] =
1929 vc->vc_tab_stop[7] = 0;
1da177e4
LT		 1930 }
1931 return;
1932 case 'm':
1933 csi_m(vc);
1934 return;
1935 case 'q': /* DECLL - but only 3 leds */
1936 /* map 0,1,2,3 to 0,1,2,4 */
1937 if (vc->vc_par[0] < 4)
079c9534 1938 vt_set_led_state(vc->vc_num,
1da177e4
LT		 1939 (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4);
1940 return;
1941 case 'r':
1942 if (!vc->vc_par[0])
1943 vc->vc_par[0]++;
1944 if (!vc->vc_par[1])
1945 vc->vc_par[1] = vc->vc_rows;
1946 /* Minimum allowed region is 2 lines */
1947 if (vc->vc_par[0] < vc->vc_par[1] &&
1948 vc->vc_par[1] <= vc->vc_rows) {
1949 vc->vc_top = vc->vc_par[0] - 1;
1950 vc->vc_bottom = vc->vc_par[1];
1951 gotoxay(vc, 0, 0);
1952 }
1953 return;
1954 case 's':
1955 save_cur(vc);
1956 return;
1957 case 'u':
1958 restore_cur(vc);
1959 return;
1960 case 'X':
1961 csi_X(vc, vc->vc_par[0]);
1962 return;
1963 case '@':
1964 csi_at(vc, vc->vc_par[0]);
1965 return;
1966 case ']': /* setterm functions */
1967 setterm_command(vc);
1968 return;
1969 }
1970 return;
1971 case ESpercent:
1972 vc->vc_state = ESnormal;
1973 switch (c) {
1974 case '@': /* defined in ISO 2022 */
1975 vc->vc_utf = 0;
1976 return;
1977 case 'G': /* prelim official escape code */
1978 case '8': /* retained for compatibility */
1979 vc->vc_utf = 1;
1980 return;
1981 }
1982 return;
1983 case ESfunckey:
1984 vc->vc_state = ESnormal;
1985 return;
1986 case EShash:
1987 vc->vc_state = ESnormal;
1988 if (c == '8') {
1989 /* DEC screen alignment test. kludge :-) */
1990 vc->vc_video_erase_char =
1991 (vc->vc_video_erase_char & 0xff00) | 'E';
1992 csi_J(vc, 2);
1993 vc->vc_video_erase_char =
1994 (vc->vc_video_erase_char & 0xff00) | ' ';
1995 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
1996 }
1997 return;
1998 case ESsetG0:
1999 if (c == '0')
2000 vc->vc_G0_charset = GRAF_MAP;
2001 else if (c == 'B')
2002 vc->vc_G0_charset = LAT1_MAP;
2003 else if (c == 'U')
2004 vc->vc_G0_charset = IBMPC_MAP;
2005 else if (c == 'K')
2006 vc->vc_G0_charset = USER_MAP;
2007 if (vc->vc_charset == 0)
2008 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
2009 vc->vc_state = ESnormal;
2010 return;
2011 case ESsetG1:
2012 if (c == '0')
2013 vc->vc_G1_charset = GRAF_MAP;
2014 else if (c == 'B')
2015 vc->vc_G1_charset = LAT1_MAP;
2016 else if (c == 'U')
2017 vc->vc_G1_charset = IBMPC_MAP;
2018 else if (c == 'K')
2019 vc->vc_G1_charset = USER_MAP;
2020 if (vc->vc_charset == 1)
2021 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
2022 vc->vc_state = ESnormal;
2023 return;
2024 default:
2025 vc->vc_state = ESnormal;
2026 }
2027}
2028
2f1a2ccb 2029/* is_double_width() is based on the wcwidth() implementation by
1ed8a2b3 2030 * Markus Kuhn -- 2007-05-26 (Unicode 5.0)
2f1a2ccb
EK		 2031 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
2032 */
2033struct interval {
2034 uint32_t first;
2035 uint32_t last;
2036};
2037
2038static int bisearch(uint32_t ucs, const struct interval *table, int max)
2039{
2040 int min = 0;
2041 int mid;
2042
2043 if (ucs < table[0].first || ucs > table[max].last)
2044 return 0;
2045 while (max >= min) {
2046 mid = (min + max) / 2;
2047 if (ucs > table[mid].last)
2048 min = mid + 1;
2049 else if (ucs < table[mid].first)
2050 max = mid - 1;
2051 else
2052 return 1;
2053 }
2054 return 0;
2055}
2056
2057static int is_double_width(uint32_t ucs)
2058{
2059 static const struct interval double_width[] = {
2060 { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E },
2061 { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF },
1ed8a2b3
EK		 2062 { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 },
2063 { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD }
2f1a2ccb 2064 };
0f11541b 2065 return bisearch(ucs, double_width, ARRAY_SIZE(double_width) - 1);
2f1a2ccb
EK		 2066}
2067
ac751efa 2068/* acquires console_lock */
1da177e4
LT		 2069static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2070{
2071#ifdef VT_BUF_VRAM_ONLY
2072#define FLUSH do { } while(0);
2073#else
2074#define FLUSH if (draw_x >= 0) { \
2075 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
2076 draw_x = -1; \
2077 }
2078#endif
2079
2080 int c, tc, ok, n = 0, draw_x = -1;
2081 unsigned int currcons;
2082 unsigned long draw_from = 0, draw_to = 0;
2083 struct vc_data *vc;
2f1a2ccb 2084 unsigned char vc_attr;
0341a4d0 2085 struct vt_notifier_param param;
2f1a2ccb
EK		 2086 uint8_t rescan;
2087 uint8_t inverse;
2088 uint8_t width;
1da177e4 2089 u16 himask, charmask;
1da177e4
LT		 2090
2091 if (in_interrupt())
2092 return count;
2093
2094 might_sleep();
2095
ac751efa 2096 console_lock();
1da177e4
LT		 2097 vc = tty->driver_data;
2098 if (vc == NULL) {
2099 printk(KERN_ERR "vt: argh, driver_data is NULL !\n");
ac751efa 2100 console_unlock();
1da177e4
LT		 2101 return 0;
2102 }
2103
2104 currcons = vc->vc_num;
2105 if (!vc_cons_allocated(currcons)) {
1ffdda95
MSB		 2106 /* could this happen? */
2107 pr_warn_once("con_write: tty %d not allocated\n", currcons+1);
2108 console_unlock();
2109 return 0;
1da177e4 2110 }
1da177e4 2111
1da177e4
LT		 2112 himask = vc->vc_hi_font_mask;
2113 charmask = himask ? 0x1ff : 0xff;
2114
2115 /* undraw cursor first */
2116 if (IS_FG(vc))
2117 hide_cursor(vc);
2118
0341a4d0
KD		 2119 param.vc = vc;
2120
1da177e4
LT		 2121 while (!tty->stopped && count) {
2122 int orig = *buf;
2123 c = orig;
2124 buf++;
2125 n++;
2126 count--;
2f1a2ccb
EK		 2127 rescan = 0;
2128 inverse = 0;
2129 width = 1;
1da177e4
LT		 2130
2131 /* Do no translation at all in control states */
2132 if (vc->vc_state != ESnormal) {
2133 tc = c;
d4328b40 2134 } else if (vc->vc_utf && !vc->vc_disp_ctrl) {
2f1a2ccb
EK		 2135 /* Combine UTF-8 into Unicode in vc_utf_char.
2136 * vc_utf_count is the number of continuation bytes still
2137 * expected to arrive.
2138 * vc_npar is the number of continuation bytes arrived so
2139 * far
2140 */
d4328b40 2141rescan_last_byte:
2f1a2ccb
EK		 2142 if ((c & 0xc0) == 0x80) {
2143 /* Continuation byte received */
2144 static const uint32_t utf8_length_changes[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff };
d4328b40 2145 if (vc->vc_utf_count) {
2f1a2ccb
EK		 2146 vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f);
2147 vc->vc_npar++;
2148 if (--vc->vc_utf_count) {
2149 /* Still need some bytes */
1da177e4 2150 continue;
2f1a2ccb
EK		 2151 }
2152 /* Got a whole character */
2153 c = vc->vc_utf_char;
2154 /* Reject overlong sequences */
2155 if (c <= utf8_length_changes[vc->vc_npar - 1] ||
2156 c > utf8_length_changes[vc->vc_npar])
2157 c = 0xfffd;
2158 } else {
2159 /* Unexpected continuation byte */
2160 vc->vc_utf_count = 0;
2161 c = 0xfffd;
2162 }
1da177e4 2163 } else {
2f1a2ccb
EK		 2164 /* Single ASCII byte or first byte of a sequence received */
2165 if (vc->vc_utf_count) {
2166 /* Continuation byte expected */
2167 rescan = 1;
2168 vc->vc_utf_count = 0;
2169 c = 0xfffd;
2170 } else if (c > 0x7f) {
2171 /* First byte of a multibyte sequence received */
2172 vc->vc_npar = 0;
2173 if ((c & 0xe0) == 0xc0) {
2174 vc->vc_utf_count = 1;
2175 vc->vc_utf_char = (c & 0x1f);
2176 } else if ((c & 0xf0) == 0xe0) {
2177 vc->vc_utf_count = 2;
2178 vc->vc_utf_char = (c & 0x0f);
2179 } else if ((c & 0xf8) == 0xf0) {
2180 vc->vc_utf_count = 3;
2181 vc->vc_utf_char = (c & 0x07);
2182 } else if ((c & 0xfc) == 0xf8) {
2183 vc->vc_utf_count = 4;
2184 vc->vc_utf_char = (c & 0x03);
2185 } else if ((c & 0xfe) == 0xfc) {
2186 vc->vc_utf_count = 5;
2187 vc->vc_utf_char = (c & 0x01);
2188 } else {
2189 /* 254 and 255 are invalid */
2190 c = 0xfffd;
2191 }
2192 if (vc->vc_utf_count) {
2193 /* Still need some bytes */
2194 continue;
2195 }
2196 }
2197 /* Nothing to do if an ASCII byte was received */
1da177e4 2198 }
2f1a2ccb
EK		 2199 /* End of UTF-8 decoding. */
2200 /* c is the received character, or U+FFFD for invalid sequences. */
2201 /* Replace invalid Unicode code points with U+FFFD too */
2202 if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff)
2203 c = 0xfffd;
2204 tc = c;
d4328b40 2205 } else { /* no utf or alternate charset mode */
a29ccf6f 2206 tc = vc_translate(vc, c);
1da177e4
LT		 2207 }
2208
0341a4d0
KD		 2209 param.c = tc;
2210 if (atomic_notifier_call_chain(&vt_notifier_list, VT_PREWRITE,
2211 &param) == NOTIFY_STOP)
2212 continue;
2213
1da177e4
LT		 2214 /* If the original code was a control character we
2215 * only allow a glyph to be displayed if the code is
2216 * not normally used (such as for cursor movement) or
2217 * if the disp_ctrl mode has been explicitly enabled.
2218 * Certain characters (as given by the CTRL_ALWAYS
2219 * bitmap) are always displayed as control characters,
2220 * as the console would be pretty useless without
2221 * them; to display an arbitrary font position use the
2222 * direct-to-font zone in UTF-8 mode.
2223 */
2224 ok = tc && (c >= 32 ||
d4328b40
AT		 2225 !(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 :
2226 vc->vc_utf || ((CTRL_ACTION >> c) & 1)))
1da177e4
LT		 2227 && (c != 127 || vc->vc_disp_ctrl)
2228 && (c != 128+27);
2229
2230 if (vc->vc_state == ESnormal && ok) {
2f1a2ccb
EK		 2231 if (vc->vc_utf && !vc->vc_disp_ctrl) {
2232 if (is_double_width(c))
2233 width = 2;
2234 }
1da177e4
LT		 2235 /* Now try to find out how to display it */
2236 tc = conv_uni_to_pc(vc, tc);
d4328b40 2237 if (tc & ~charmask) {
2f1a2ccb
EK		 2238 if (tc == -1 || tc == -2) {
2239 continue; /* nothing to display */
2240 }
2241 /* Glyph not found */
c0b79882 2242 if ((!(vc->vc_utf && !vc->vc_disp_ctrl) || c < 128) && !(c & ~charmask)) {
2f1a2ccb 2243 /* In legacy mode use the glyph we get by a 1:1 mapping.
1ed8a2b3
EK		 2244 This would make absolutely no sense with Unicode in mind,
2245 but do this for ASCII characters since a font may lack
2246 Unicode mapping info and we don't want to end up with
2247 having question marks only. */
2f1a2ccb
EK		 2248 tc = c;
2249 } else {
2250 /* Display U+FFFD. If it's not found, display an inverse question mark. */
2251 tc = conv_uni_to_pc(vc, 0xfffd);
2252 if (tc < 0) {
2253 inverse = 1;
2254 tc = conv_uni_to_pc(vc, '?');
2255 if (tc < 0) tc = '?';
2256 }
2257 }
d4328b40 2258 }
1da177e4 2259
2f1a2ccb
EK		 2260 if (!inverse) {
2261 vc_attr = vc->vc_attr;
1da177e4 2262 } else {
2f1a2ccb
EK		 2263 /* invert vc_attr */
2264 if (!vc->vc_can_do_color) {
2265 vc_attr = (vc->vc_attr) ^ 0x08;
2266 } else if (vc->vc_hi_font_mask == 0x100) {
2267 vc_attr = ((vc->vc_attr) & 0x11) | (((vc->vc_attr) & 0xe0) >> 4) | (((vc->vc_attr) & 0x0e) << 4);
2268 } else {
2269 vc_attr = ((vc->vc_attr) & 0x88) | (((vc->vc_attr) & 0x70) >> 4) | (((vc->vc_attr) & 0x07) << 4);
2270 }
1ed8a2b3 2271 FLUSH
1da177e4 2272 }
2f1a2ccb
EK		 2273
2274 while (1) {
2275 if (vc->vc_need_wrap || vc->vc_decim)
2276 FLUSH
2277 if (vc->vc_need_wrap) {
2278 cr(vc);
2279 lf(vc);
2280 }
2281 if (vc->vc_decim)
2282 insert_char(vc, 1);
2283 scr_writew(himask ?
2284 ((vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) :
2285 (vc_attr << 8) + tc,
2286 (u16 *) vc->vc_pos);
2287 if (DO_UPDATE(vc) && draw_x < 0) {
2288 draw_x = vc->vc_x;
2289 draw_from = vc->vc_pos;
2290 }
2291 if (vc->vc_x == vc->vc_cols - 1) {
2292 vc->vc_need_wrap = vc->vc_decawm;
2293 draw_to = vc->vc_pos + 2;
2294 } else {
2295 vc->vc_x++;
2296 draw_to = (vc->vc_pos += 2);
d4328b40 2297 }
2f1a2ccb
EK		 2298
2299 if (!--width) break;
2300
2301 tc = conv_uni_to_pc(vc, ' '); /* A space is printed in the second column */
2302 if (tc < 0) tc = ' ';
2303 }
b293d758 2304 notify_write(vc, c);
2f1a2ccb 2305
1ed8a2b3
EK		 2306 if (inverse) {
2307 FLUSH
2308 }
2309
2f1a2ccb
EK		 2310 if (rescan) {
2311 rescan = 0;
2312 inverse = 0;
2313 width = 1;
d4328b40
AT		 2314 c = orig;
2315 goto rescan_last_byte;
2316 }
1da177e4
LT		 2317 continue;
2318 }
2319 FLUSH
2320 do_con_trol(tty, vc, orig);
2321 }
2322 FLUSH
2323 console_conditional_schedule();
ac751efa 2324 console_unlock();
b293d758 2325 notify_update(vc);
1da177e4
LT		 2326 return n;
2327#undef FLUSH
2328}
2329
2330/*
2331 * This is the console switching callback.
2332 *
2333 * Doing console switching in a process context allows
2334 * us to do the switches asynchronously (needed when we want
2335 * to switch due to a keyboard interrupt). Synchronization
2336 * with other console code and prevention of re-entrancy is
ac751efa 2337 * ensured with console_lock.
1da177e4 2338 */
65f27f38 2339static void console_callback(struct work_struct *ignored)
1da177e4 2340{
ac751efa 2341 console_lock();
1da177e4
LT		 2342
2343 if (want_console >= 0) {
2344 if (want_console != fg_console &&
2345 vc_cons_allocated(want_console)) {
2346 hide_cursor(vc_cons[fg_console].d);
2347 change_console(vc_cons[want_console].d);
2348 /* we only changed when the console had already
2349 been allocated - a new console is not created
2350 in an interrupt routine */
2351 }
2352 want_console = -1;
2353 }
2354 if (do_poke_blanked_console) { /* do not unblank for a LED change */
2355 do_poke_blanked_console = 0;
2356 poke_blanked_console();
2357 }
2358 if (scrollback_delta) {
2359 struct vc_data *vc = vc_cons[fg_console].d;
2360 clear_selection();
2361 if (vc->vc_mode == KD_TEXT)
2362 vc->vc_sw->con_scrolldelta(vc, scrollback_delta);
2363 scrollback_delta = 0;
2364 }
2365 if (blank_timer_expired) {
2366 do_blank_screen(0);
2367 blank_timer_expired = 0;
2368 }
b293d758 2369 notify_update(vc_cons[fg_console].d);
1da177e4 2370
ac751efa 2371 console_unlock();
1da177e4
LT		 2372}
2373
b257bc05 2374int set_console(int nr)
1da177e4 2375{
b257bc05
AJ		 2376 struct vc_data *vc = vc_cons[fg_console].d;
2377
2378 if (!vc_cons_allocated(nr) || vt_dont_switch ||
2379 (vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) {
2380
2381 /*
2382 * Console switch will fail in console_callback() or
2383 * change_console() so there is no point scheduling
2384 * the callback
2385 *
2386 * Existing set_console() users don't check the return
2387 * value so this shouldn't break anything
2388 */
2389 return -EINVAL;
2390 }
2391
1da177e4
LT		 2392 want_console = nr;
2393 schedule_console_callback();
b257bc05
AJ		 2394
2395 return 0;
1da177e4
LT		 2396}
2397
2398struct tty_driver *console_driver;
2399
2400#ifdef CONFIG_VT_CONSOLE
2401
5ada918b
BW		 2402/**
2403 * vt_kmsg_redirect() - Sets/gets the kernel message console
2404 * @new: The new virtual terminal number or -1 if the console should stay
2405 * unchanged
2406 *
2407 * By default, the kernel messages are always printed on the current virtual
2408 * console. However, the user may modify that default with the
2409 * TIOCL_SETKMSGREDIRECT ioctl call.
2410 *
2411 * This function sets the kernel message console to be @new. It returns the old
2412 * virtual console number. The virtual terminal number 0 (both as parameter and
2413 * return value) means no redirection (i.e. always printed on the currently
2414 * active console).
2415 *
2416 * The parameter -1 means that only the current console is returned, but the
2417 * value is not modified. You may use the macro vt_get_kmsg_redirect() in that
2418 * case to make the code more understandable.
2419 *
2420 * When the kernel is compiled without CONFIG_VT_CONSOLE, this function ignores
2421 * the parameter and always returns 0.
2422 */
2423int vt_kmsg_redirect(int new)
2424{
2425 static int kmsg_con;
2426
2427 if (new != -1)
2428 return xchg(&kmsg_con, new);
2429 else
2430 return kmsg_con;
2431}
2432
1da177e4
LT		 2433/*
2434 * Console on virtual terminal
2435 *
2436 * The console must be locked when we get here.
2437 */
2438
2439static void vt_console_print(struct console *co, const char *b, unsigned count)
2440{
2441 struct vc_data *vc = vc_cons[fg_console].d;
2442 unsigned char c;
b0940003 2443 static DEFINE_SPINLOCK(printing_lock);
1da177e4
LT		 2444 const ushort *start;
2445 ushort cnt = 0;
2446 ushort myx;
5ada918b 2447 int kmsg_console;
1da177e4
LT		 2448
2449 /* console busy or not yet initialized */
b0940003
NP		 2450 if (!printable)
2451 return;
2452 if (!spin_trylock(&printing_lock))
1da177e4
LT		 2453 return;
2454
5ada918b
BW		 2455 kmsg_console = vt_get_kmsg_redirect();
2456 if (kmsg_console && vc_cons_allocated(kmsg_console - 1))
2457 vc = vc_cons[kmsg_console - 1].d;
1da177e4
LT		 2458
2459 /* read `x' only after setting currcons properly (otherwise
2460 the `x' macro will read the x of the foreground console). */
2461 myx = vc->vc_x;
2462
2463 if (!vc_cons_allocated(fg_console)) {
2464 /* impossible */
2465 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2466 goto quit;
2467 }
2468
8fd4bd22 2469 if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc))
1da177e4
LT		 2470 goto quit;
2471
2472 /* undraw cursor first */
2473 if (IS_FG(vc))
2474 hide_cursor(vc);
2475
2476 start = (ushort *)vc->vc_pos;
2477
2478 /* Contrived structure to try to emulate original need_wrap behaviour
2479 * Problems caused when we have need_wrap set on '\n' character */
2480 while (count--) {
2481 c = *b++;
2482 if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) {
2483 if (cnt > 0) {
2484 if (CON_IS_VISIBLE(vc))
2485 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2486 vc->vc_x += cnt;
2487 if (vc->vc_need_wrap)
2488 vc->vc_x--;
2489 cnt = 0;
2490 }
2491 if (c == 8) { /* backspace */
2492 bs(vc);
2493 start = (ushort *)vc->vc_pos;
2494 myx = vc->vc_x;
2495 continue;
2496 }
2497 if (c != 13)
2498 lf(vc);
2499 cr(vc);
2500 start = (ushort *)vc->vc_pos;
2501 myx = vc->vc_x;
2502 if (c == 10 || c == 13)
2503 continue;
2504 }
2505 scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos);
b293d758 2506 notify_write(vc, c);
1da177e4
LT		 2507 cnt++;
2508 if (myx == vc->vc_cols - 1) {
2509 vc->vc_need_wrap = 1;
2510 continue;
2511 }
2512 vc->vc_pos += 2;
2513 myx++;
2514 }
2515 if (cnt > 0) {
2516 if (CON_IS_VISIBLE(vc))
2517 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2518 vc->vc_x += cnt;
2519 if (vc->vc_x == vc->vc_cols) {
2520 vc->vc_x--;
2521 vc->vc_need_wrap = 1;
2522 }
2523 }
2524 set_cursor(vc);
b293d758 2525 notify_update(vc);
1da177e4
LT		 2526
2527quit:
b0940003 2528 spin_unlock(&printing_lock);
1da177e4
LT		 2529}
2530
2531static struct tty_driver *vt_console_device(struct console *c, int *index)
2532{
2533 *index = c->index ? c->index-1 : fg_console;
2534 return console_driver;
2535}
2536
2537static struct console vt_console_driver = {
2538 .name = "tty",
2539 .write = vt_console_print,
2540 .device = vt_console_device,
2541 .unblank = unblank_screen,
2542 .flags = CON_PRINTBUFFER,
2543 .index = -1,
2544};
2545#endif
2546
2547/*
2548 * Handling of Linux-specific VC ioctls
2549 */
2550
2551/*
ac751efa 2552 * Generally a bit racy with respect to console_lock();.
1da177e4
LT		 2553 *
2554 * There are some functions which don't need it.
2555 *
2556 * There are some functions which can sleep for arbitrary periods
2557 * (paste_selection) but we don't need the lock there anyway.
2558 *
2559 * set_selection has locking, and definitely needs it
2560 */
2561
2562int tioclinux(struct tty_struct *tty, unsigned long arg)
2563{
2564 char type, data;
2565 char __user *p = (char __user *)arg;
2566 int lines;
2567 int ret;
2568
1da177e4
LT		 2569 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN))
2570 return -EPERM;
2571 if (get_user(type, p))
2572 return -EFAULT;
2573 ret = 0;
04f378b1 2574
1da177e4
LT		 2575 switch (type)
2576 {
2577 case TIOCL_SETSEL:
ac751efa 2578 console_lock();
1da177e4 2579 ret = set_selection((struct tiocl_selection __user *)(p+1), tty);
ac751efa 2580 console_unlock();
1da177e4
LT		 2581 break;
2582 case TIOCL_PASTESEL:
2583 ret = paste_selection(tty);
2584 break;
2585 case TIOCL_UNBLANKSCREEN:
ac751efa 2586 console_lock();
1da177e4 2587 unblank_screen();
ac751efa 2588 console_unlock();
1da177e4
LT		 2589 break;
2590 case TIOCL_SELLOADLUT:
5289475d 2591 console_lock();
1da177e4 2592 ret = sel_loadlut(p);
5289475d 2593 console_unlock();
1da177e4
LT		 2594 break;
2595 case TIOCL_GETSHIFTSTATE:
04f378b1 2596
1da177e4
LT		 2597 /*
2598 * Make it possible to react to Shift+Mousebutton.
2599 * Note that 'shift_state' is an undocumented
2600 * kernel-internal variable; programs not closely
2601 * related to the kernel should not use this.
2602 */
079c9534 2603 data = vt_get_shift_state();
1fc0b43a 2604 ret = put_user(data, p);
1da177e4
LT		 2605 break;
2606 case TIOCL_GETMOUSEREPORTING:
20f62579 2607 console_lock(); /* May be overkill */
1da177e4 2608 data = mouse_reporting();
20f62579 2609 console_unlock();
1fc0b43a 2610 ret = put_user(data, p);
1da177e4
LT		 2611 break;
2612 case TIOCL_SETVESABLANK:
20f62579 2613 console_lock();
403aac96 2614 ret = set_vesa_blanking(p);
20f62579 2615 console_unlock();
1da177e4 2616 break;
0ca07731 2617 case TIOCL_GETKMSGREDIRECT:
5ada918b 2618 data = vt_get_kmsg_redirect();
1fc0b43a 2619 ret = put_user(data, p);
0ca07731 2620 break;
1da177e4
LT		 2621 case TIOCL_SETKMSGREDIRECT:
2622 if (!capable(CAP_SYS_ADMIN)) {
2623 ret = -EPERM;
2624 } else {
2625 if (get_user(data, p+1))
2626 ret = -EFAULT;
2627 else
5ada918b 2628 vt_kmsg_redirect(data);
1da177e4
LT		 2629 }
2630 break;
2631 case TIOCL_GETFGCONSOLE:
20f62579
AC		 2632 /* No locking needed as this is a transiently
2633 correct return anyway if the caller hasn't
2634 disabled switching */
1da177e4
LT		 2635 ret = fg_console;
2636 break;
2637 case TIOCL_SCROLLCONSOLE:
2638 if (get_user(lines, (s32 __user *)(p+4))) {
2639 ret = -EFAULT;
2640 } else {
20f62579
AC		 2641 /* Need the console lock here. Note that lots
2642 of other calls need fixing before the lock
2643 is actually useful ! */
2644 console_lock();
1da177e4 2645 scrollfront(vc_cons[fg_console].d, lines);
20f62579 2646 console_unlock();
1da177e4
LT		 2647 ret = 0;
2648 }
2649 break;
2650 case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
ac751efa 2651 console_lock();
1da177e4
LT		 2652 ignore_poke = 1;
2653 do_blank_screen(0);
ac751efa 2654 console_unlock();
1da177e4
LT		 2655 break;
2656 case TIOCL_BLANKEDSCREEN:
2657 ret = console_blanked;
2658 break;
2659 default:
2660 ret = -EINVAL;
2661 break;
2662 }
2663 return ret;
2664}
2665
2666/*
2667 * /dev/ttyN handling
2668 */
2669
2670static int con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2671{
2672 int retval;
2673
2674 retval = do_con_write(tty, buf, count);
2675 con_flush_chars(tty);
2676
2677 return retval;
2678}
2679
5d19f546 2680static int con_put_char(struct tty_struct *tty, unsigned char ch)
1da177e4
LT		 2681{
2682 if (in_interrupt())
5d19f546
AC		 2683 return 0; /* n_r3964 calls put_char() from interrupt context */
2684 return do_con_write(tty, &ch, 1);
1da177e4
LT		 2685}
2686
2687static int con_write_room(struct tty_struct *tty)
2688{
2689 if (tty->stopped)
2690 return 0;
a88a69c9 2691 return 32768; /* No limit, really; we're not buffering */
1da177e4
LT		 2692}
2693
2694static int con_chars_in_buffer(struct tty_struct *tty)
2695{
2696 return 0; /* we're not buffering */
2697}
2698
2699/*
2700 * con_throttle and con_unthrottle are only used for
2701 * paste_selection(), which has to stuff in a large number of
2702 * characters...
2703 */
2704static void con_throttle(struct tty_struct *tty)
2705{
2706}
2707
2708static void con_unthrottle(struct tty_struct *tty)
2709{
2710 struct vc_data *vc = tty->driver_data;
2711
2712 wake_up_interruptible(&vc->paste_wait);
2713}
2714
2715/*
2716 * Turn the Scroll-Lock LED on when the tty is stopped
2717 */
2718static void con_stop(struct tty_struct *tty)
2719{
2720 int console_num;
2721 if (!tty)
2722 return;
2723 console_num = tty->index;
2724 if (!vc_cons_allocated(console_num))
2725 return;
079c9534 2726 vt_kbd_con_stop(console_num);
1da177e4
LT		 2727}
2728
2729/*
2730 * Turn the Scroll-Lock LED off when the console is started
2731 */
2732static void con_start(struct tty_struct *tty)
2733{
2734 int console_num;
2735 if (!tty)
2736 return;
2737 console_num = tty->index;
2738 if (!vc_cons_allocated(console_num))
2739 return;
079c9534 2740 vt_kbd_con_start(console_num);
1da177e4
LT		 2741}
2742
2743static void con_flush_chars(struct tty_struct *tty)
2744{
2745 struct vc_data *vc;
2746
2747 if (in_interrupt()) /* from flush_to_ldisc */
2748 return;
2749
2750 /* if we race with con_close(), vt may be null */
ac751efa 2751 console_lock();
1da177e4
LT		 2752 vc = tty->driver_data;
2753 if (vc)
2754 set_cursor(vc);
ac751efa 2755 console_unlock();
1da177e4
LT		 2756}
2757
2758/*
2759 * Allocate the console screen memory.
2760 */
bc1e99d9 2761static int con_install(struct tty_driver *driver, struct tty_struct *tty)
1da177e4
LT		 2762{
2763 unsigned int currcons = tty->index;
bc1e99d9
JS		 2764 struct vc_data *vc;
2765 int ret;
1da177e4 2766
ac751efa 2767 console_lock();
bc1e99d9
JS		 2768 ret = vc_allocate(currcons);
2769 if (ret)
2770 goto unlock;
feebed65 2771
bc1e99d9 2772 vc = vc_cons[currcons].d;
1da177e4 2773
bc1e99d9
JS		 2774 /* Still being freed */
2775 if (vc->port.tty) {
2776 ret = -ERESTARTSYS;
2777 goto unlock;
2778 }
2779
2780 ret = tty_port_install(&vc->port, driver, tty);
2781 if (ret)
2782 goto unlock;
2783
2784 tty->driver_data = vc;
2785 vc->port.tty = tty;
2786
2787 if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
2788 tty->winsize.ws_row = vc_cons[currcons].d->vc_rows;
2789 tty->winsize.ws_col = vc_cons[currcons].d->vc_cols;
1da177e4 2790 }
bc1e99d9 2791 if (vc->vc_utf)
adc8d746 2792 tty->termios.c_iflag |= IUTF8;
bc1e99d9 2793 else
adc8d746 2794 tty->termios.c_iflag &= ~IUTF8;
bc1e99d9 2795unlock:
ac751efa 2796 console_unlock();
1da177e4
LT		 2797 return ret;
2798}
2799
bc1e99d9
JS		 2800static int con_open(struct tty_struct *tty, struct file *filp)
2801{
2802 /* everything done in install */
2803 return 0;
2804}
2805
2806
1da177e4
LT		 2807static void con_close(struct tty_struct *tty, struct file *filp)
2808{
feebed65
AC		 2809 /* Nothing to do - we defer to shutdown */
2810}
1da177e4 2811
feebed65
AC		 2812static void con_shutdown(struct tty_struct *tty)
2813{
2814 struct vc_data *vc = tty->driver_data;
2815 BUG_ON(vc == NULL);
ac751efa 2816 console_lock();
8ce73264 2817 vc->port.tty = NULL;
ac751efa 2818 console_unlock();
1da177e4
LT		 2819}
2820
fa6ce9ab
JE		 2821static int default_italic_color = 2; // green (ASCII)
2822static int default_underline_color = 3; // cyan (ASCII)
2823module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR);
2824module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR);
2825
1da177e4
LT		 2826static void vc_init(struct vc_data *vc, unsigned int rows,
2827 unsigned int cols, int do_clear)
2828{
2829 int j, k ;
2830
2831 vc->vc_cols = cols;
2832 vc->vc_rows = rows;
2833 vc->vc_size_row = cols << 1;
2834 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
2835
2836 set_origin(vc);
2837 vc->vc_pos = vc->vc_origin;
2838 reset_vc(vc);
2839 for (j=k=0; j<16; j++) {
2840 vc->vc_palette[k++] = default_red[j] ;
2841 vc->vc_palette[k++] = default_grn[j] ;
2842 vc->vc_palette[k++] = default_blu[j] ;
2843 }
2844 vc->vc_def_color = 0x07; /* white */
fa6ce9ab
JE		 2845 vc->vc_ulcolor = default_underline_color;
2846 vc->vc_itcolor = default_italic_color;
1da177e4
LT		 2847 vc->vc_halfcolor = 0x08; /* grey */
2848 init_waitqueue_head(&vc->paste_wait);
2849 reset_terminal(vc, do_clear);
2850}
2851
2852/*
2853 * This routine initializes console interrupts, and does nothing
2854 * else. If you want the screen to clear, call tty_write with
2855 * the appropriate escape-sequence.
2856 */
2857
2858static int __init con_init(void)
2859{
2860 const char *display_desc = NULL;
2861 struct vc_data *vc;
3e795de7 2862 unsigned int currcons = 0, i;
1da177e4 2863
ac751efa 2864 console_lock();
1da177e4
LT		 2865
2866 if (conswitchp)
2867 display_desc = conswitchp->con_startup();
2868 if (!display_desc) {
2869 fg_console = 0;
ac751efa 2870 console_unlock();
1da177e4
LT		 2871 return 0;
2872 }
2873
3e795de7
AD		 2874 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2875 struct con_driver *con_driver = &registered_con_driver[i];
2876
2877 if (con_driver->con == NULL) {
2878 con_driver->con = conswitchp;
2879 con_driver->desc = display_desc;
2880 con_driver->flag = CON_DRIVER_FLAG_INIT;
2881 con_driver->first = 0;
2882 con_driver->last = MAX_NR_CONSOLES - 1;
2883 break;
2884 }
2885 }
2886
2887 for (i = 0; i < MAX_NR_CONSOLES; i++)
2888 con_driver_map[i] = conswitchp;
2889
1da177e4
LT		 2890 if (blankinterval) {
2891 blank_state = blank_normal_wait;
f324edc8 2892 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
1da177e4
LT		 2893 }
2894
1da177e4 2895 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) {
a5f4f52e 2896 vc_cons[currcons].d = vc = kzalloc(sizeof(struct vc_data), GFP_NOWAIT);
7f1f86a0 2897 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
ff917ba4 2898 tty_port_init(&vc->port);
1da177e4 2899 visual_init(vc, currcons, 1);
a5f4f52e 2900 vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_NOWAIT);
1da177e4
LT		 2901 vc_init(vc, vc->vc_rows, vc->vc_cols,
2902 currcons || !vc->vc_sw->con_save_screen);
2903 }
2904 currcons = fg_console = 0;
2905 master_display_fg = vc = vc_cons[currcons].d;
2906 set_origin(vc);
2907 save_screen(vc);
2908 gotoxy(vc, vc->vc_x, vc->vc_y);
2909 csi_J(vc, 0);
2910 update_screen(vc);
5da527aa 2911 pr_info("Console: %s %s %dx%d\n",
1da177e4
LT		 2912 vc->vc_can_do_color ? "colour" : "mono",
2913 display_desc, vc->vc_cols, vc->vc_rows);
2914 printable = 1;
1da177e4 2915
ac751efa 2916 console_unlock();
1da177e4
LT		 2917
2918#ifdef CONFIG_VT_CONSOLE
2919 register_console(&vt_console_driver);
2920#endif
2921 return 0;
2922}
2923console_initcall(con_init);
2924
b68e31d0 2925static const struct tty_operations con_ops = {
bc1e99d9 2926 .install = con_install,
1da177e4
LT		 2927 .open = con_open,
2928 .close = con_close,
2929 .write = con_write,
2930 .write_room = con_write_room,
2931 .put_char = con_put_char,
2932 .flush_chars = con_flush_chars,
2933 .chars_in_buffer = con_chars_in_buffer,
2934 .ioctl = vt_ioctl,
e9216651
AB		 2935#ifdef CONFIG_COMPAT
2936 .compat_ioctl = vt_compat_ioctl,
2937#endif
1da177e4
LT		 2938 .stop = con_stop,
2939 .start = con_start,
2940 .throttle = con_throttle,
2941 .unthrottle = con_unthrottle,
8c9a9dd0 2942 .resize = vt_resize,
feebed65 2943 .shutdown = con_shutdown
1da177e4
LT		 2944};
2945
d81ed103
AC		 2946static struct cdev vc0_cdev;
2947
fbc92a34
KS		 2948static ssize_t show_tty_active(struct device *dev,
2949 struct device_attribute *attr, char *buf)
2950{
2951 return sprintf(buf, "tty%d\n", fg_console + 1);
2952}
2953static DEVICE_ATTR(active, S_IRUGO, show_tty_active, NULL);
2954
d81ed103 2955int __init vty_init(const struct file_operations *console_fops)
1da177e4 2956{
d81ed103
AC		 2957 cdev_init(&vc0_cdev, console_fops);
2958 if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) ||
2959 register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0)
2960 panic("Couldn't register /dev/tty0 driver\n");
fbc92a34
KS		 2961 tty0dev = device_create(tty_class, NULL, MKDEV(TTY_MAJOR, 0), NULL, "tty0");
2962 if (IS_ERR(tty0dev))
2963 tty0dev = NULL;
2964 else
a2a6a822 2965 WARN_ON(device_create_file(tty0dev, &dev_attr_active) < 0);
d81ed103 2966
1da177e4
LT		 2967 vcs_init();
2968
2969 console_driver = alloc_tty_driver(MAX_NR_CONSOLES);
2970 if (!console_driver)
2971 panic("Couldn't allocate console driver\n");
2f16669d 2972
1da177e4
LT		 2973 console_driver->name = "tty";
2974 console_driver->name_base = 1;
2975 console_driver->major = TTY_MAJOR;
2976 console_driver->minor_start = 1;
2977 console_driver->type = TTY_DRIVER_TYPE_CONSOLE;
2978 console_driver->init_termios = tty_std_termios;
c1236d31
ST		 2979 if (default_utf8)
2980 console_driver->init_termios.c_iflag |= IUTF8;
1da177e4
LT		 2981 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS;
2982 tty_set_operations(console_driver, &con_ops);
2983 if (tty_register_driver(console_driver))
2984 panic("Couldn't register console driver\n");
1da177e4
LT		 2985 kbd_init();
2986 console_map_init();
1da177e4
LT		 2987#ifdef CONFIG_MDA_CONSOLE
2988 mda_console_init();
2989#endif
2990 return 0;
2991}
2992
2993#ifndef VT_SINGLE_DRIVER
6db4063c
AD		 2994
2995static struct class *vtconsole_class;
2996
50e244cc 2997static int do_bind_con_driver(const struct consw *csw, int first, int last,
b7269dd2 2998 int deflt)
1da177e4 2999{
3e795de7
AD		 3000 struct module *owner = csw->owner;
3001 const char *desc = NULL;
3002 struct con_driver *con_driver;
3003 int i, j = -1, k = -1, retval = -ENODEV;
1da177e4 3004
1da177e4
LT		 3005 if (!try_module_get(owner))
3006 return -ENODEV;
3007
50e244cc 3008 WARN_CONSOLE_UNLOCKED();
1c8ce271 3009
3e795de7
AD		 3010 /* check if driver is registered */
3011 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3012 con_driver = &registered_con_driver[i];
3013
3014 if (con_driver->con == csw) {
3015 desc = con_driver->desc;
3016 retval = 0;
3017 break;
3018 }
3019 }
3020
3021 if (retval)
3022 goto err;
3023
3024 if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) {
3025 csw->con_startup();
3026 con_driver->flag |= CON_DRIVER_FLAG_INIT;
1da177e4 3027 }
1c8ce271 3028
1da177e4
LT		 3029 if (deflt) {
3030 if (conswitchp)
3031 module_put(conswitchp->owner);
1c8ce271 3032
1da177e4
LT		 3033 __module_get(owner);
3034 conswitchp = csw;
3035 }
3036
3e795de7
AD		 3037 first = max(first, con_driver->first);
3038 last = min(last, con_driver->last);
3039
1da177e4
LT		 3040 for (i = first; i <= last; i++) {
3041 int old_was_color;
3042 struct vc_data *vc = vc_cons[i].d;
3043
3044 if (con_driver_map[i])
3045 module_put(con_driver_map[i]->owner);
3046 __module_get(owner);
3047 con_driver_map[i] = csw;
3048
3049 if (!vc || !vc->vc_sw)
3050 continue;
3051
3052 j = i;
1c8ce271 3053
4ee1acce
DH		 3054 if (CON_IS_VISIBLE(vc)) {
3055 k = i;
1da177e4 3056 save_screen(vc);
4ee1acce
DH		 3057 }
3058
1da177e4
LT		 3059 old_was_color = vc->vc_can_do_color;
3060 vc->vc_sw->con_deinit(vc);
9fc2b2d0 3061 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
1da177e4 3062 visual_init(vc, i, 0);
1c8ce271 3063 set_origin(vc);
1da177e4
LT		 3064 update_attr(vc);
3065
3066 /* If the console changed between mono <-> color, then
3067 * the attributes in the screenbuf will be wrong. The
3068 * following resets all attributes to something sane.
3069 */
3070 if (old_was_color != vc->vc_can_do_color)
3071 clear_buffer_attributes(vc);
1da177e4 3072 }
4ee1acce 3073
1ffdda95 3074 pr_info("Console: switching ");
1da177e4
LT		 3075 if (!deflt)
3076 printk("consoles %d-%d ", first+1, last+1);
4ee1acce
DH		 3077 if (j >= 0) {
3078 struct vc_data *vc = vc_cons[j].d;
3079
1da177e4 3080 printk("to %s %s %dx%d\n",
4ee1acce
DH		 3081 vc->vc_can_do_color ? "colour" : "mono",
3082 desc, vc->vc_cols, vc->vc_rows);
3083
3084 if (k >= 0) {
3085 vc = vc_cons[k].d;
3086 update_screen(vc);
3087 }
3088 } else
1da177e4
LT		 3089 printk("to %s\n", desc);
3090
3e795de7
AD		 3091 retval = 0;
3092err:
1da177e4 3093 module_put(owner);
3e795de7
AD		 3094 return retval;
3095};
1da177e4 3096
50e244cc
AC		 3097
3098static int bind_con_driver(const struct consw *csw, int first, int last,
3099 int deflt)
3100{
3101 int ret;
3102
3103 console_lock();
3104 ret = do_bind_con_driver(csw, first, last, deflt);
3105 console_unlock();
3106 return ret;
3107}
3108
13ae6645
AD		 3109#ifdef CONFIG_VT_HW_CONSOLE_BINDING
3110static int con_is_graphics(const struct consw *csw, int first, int last)
3111{
3112 int i, retval = 0;
3113
3114 for (i = first; i <= last; i++) {
3115 struct vc_data *vc = vc_cons[i].d;
3116
3117 if (vc && vc->vc_mode == KD_GRAPHICS) {
3118 retval = 1;
3119 break;
3120 }
3121 }
3122
3123 return retval;
3124}
3125
b7269dd2
JB		 3126/**
3127 * unbind_con_driver - unbind a console driver
3128 * @csw: pointer to console driver to unregister
3129 * @first: first in range of consoles that @csw should be unbound from
3130 * @last: last in range of consoles that @csw should be unbound from
3131 * @deflt: should next bound console driver be default after @csw is unbound?
3132 *
3133 * To unbind a driver from all possible consoles, pass 0 as @first and
3134 * %MAX_NR_CONSOLES as @last.
3135 *
3136 * @deflt controls whether the console that ends up replacing @csw should be
3137 * the default console.
3138 *
3139 * RETURNS:
3140 * -ENODEV if @csw isn't a registered console driver or can't be unregistered
3141 * or 0 on success.
3142 */
623e71b0 3143int unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
e93a9a86
TI		 3144{
3145 int retval;
3146
3147 console_lock();
3148 retval = do_unbind_con_driver(csw, first, last, deflt);
3149 console_unlock();
3150 return retval;
3151}
3152EXPORT_SYMBOL(unbind_con_driver);
3153
3154/* unlocked version of unbind_con_driver() */
3155int do_unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
1da177e4 3156{
3e795de7
AD		 3157 struct module *owner = csw->owner;
3158 const struct consw *defcsw = NULL;
3159 struct con_driver *con_driver = NULL, *con_back = NULL;
3160 int i, retval = -ENODEV;
1da177e4 3161
3e795de7
AD		 3162 if (!try_module_get(owner))
3163 return -ENODEV;
3164
e93a9a86 3165 WARN_CONSOLE_UNLOCKED();
3e795de7
AD		 3166
3167 /* check if driver is registered and if it is unbindable */
3168 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3169 con_driver = &registered_con_driver[i];
3170
3171 if (con_driver->con == csw &&
6db4063c 3172 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3e795de7
AD		 3173 retval = 0;
3174 break;
3175 }
3176 }
3177
e93a9a86 3178 if (retval)
3e795de7 3179 goto err;
3e795de7 3180
6db4063c
AD		 3181 retval = -ENODEV;
3182
3e795de7
AD		 3183 /* check if backup driver exists */
3184 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3185 con_back = &registered_con_driver[i];
3186
3187 if (con_back->con &&
6db4063c 3188 !(con_back->flag & CON_DRIVER_FLAG_MODULE)) {
3e795de7
AD		 3189 defcsw = con_back->con;
3190 retval = 0;
3191 break;
3192 }
3193 }
3194
e93a9a86 3195 if (retval)
3e795de7 3196 goto err;
3e795de7 3197
e93a9a86 3198 if (!con_is_bound(csw))
3e795de7 3199 goto err;
3e795de7
AD		 3200
3201 first = max(first, con_driver->first);
3202 last = min(last, con_driver->last);
3203
3204 for (i = first; i <= last; i++) {
1da177e4
LT		 3205 if (con_driver_map[i] == csw) {
3206 module_put(csw->owner);
3207 con_driver_map[i] = NULL;
3208 }
3e795de7
AD		 3209 }
3210
3211 if (!con_is_bound(defcsw)) {
6db4063c
AD		 3212 const struct consw *defconsw = conswitchp;
3213
3e795de7
AD		 3214 defcsw->con_startup();
3215 con_back->flag |= CON_DRIVER_FLAG_INIT;
6db4063c
AD		 3216 /*
3217 * vgacon may change the default driver to point
3218 * to dummycon, we restore it here...
3219 */
3220 conswitchp = defconsw;
3e795de7
AD		 3221 }
3222
3223 if (!con_is_bound(csw))
3224 con_driver->flag &= ~CON_DRIVER_FLAG_INIT;
3225
6db4063c 3226 /* ignore return value, binding should not fail */
50e244cc 3227 do_bind_con_driver(defcsw, first, last, deflt);
3e795de7
AD		 3228err:
3229 module_put(owner);
3230 return retval;
3231
3232}
e93a9a86 3233EXPORT_SYMBOL_GPL(do_unbind_con_driver);
3e795de7 3234
6db4063c
AD		 3235static int vt_bind(struct con_driver *con)
3236{
3237 const struct consw *defcsw = NULL, *csw = NULL;
3238 int i, more = 1, first = -1, last = -1, deflt = 0;
3239
3240 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3241 con_is_graphics(con->con, con->first, con->last))
3242 goto err;
3243
3244 csw = con->con;
3245
3246 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3247 struct con_driver *con = &registered_con_driver[i];
3248
3249 if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) {
3250 defcsw = con->con;
3251 break;
3252 }
3253 }
3254
3255 if (!defcsw)
3256 goto err;
3257
3258 while (more) {
3259 more = 0;
3260
3261 for (i = con->first; i <= con->last; i++) {
3262 if (con_driver_map[i] == defcsw) {
3263 if (first == -1)
3264 first = i;
3265 last = i;
3266 more = 1;
3267 } else if (first != -1)
3268 break;
3269 }
3270
3271 if (first == 0 && last == MAX_NR_CONSOLES -1)
3272 deflt = 1;
3273
3274 if (first != -1)
3275 bind_con_driver(csw, first, last, deflt);
3276
3277 first = -1;
3278 last = -1;
3279 deflt = 0;
3280 }
3281
3282err:
3283 return 0;
3284}
3285
3286static int vt_unbind(struct con_driver *con)
3287{
3288 const struct consw *csw = NULL;
3289 int i, more = 1, first = -1, last = -1, deflt = 0;
3290
3291 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3292 con_is_graphics(con->con, con->first, con->last))
3293 goto err;
3294
3295 csw = con->con;
3296
3297 while (more) {
3298 more = 0;
3299
3300 for (i = con->first; i <= con->last; i++) {
3301 if (con_driver_map[i] == csw) {
3302 if (first == -1)
3303 first = i;
3304 last = i;
3305 more = 1;
3306 } else if (first != -1)
3307 break;
3308 }
3309
3310 if (first == 0 && last == MAX_NR_CONSOLES -1)
3311 deflt = 1;
3312
3313 if (first != -1)
3314 unbind_con_driver(csw, first, last, deflt);
3315
3316 first = -1;
3317 last = -1;
3318 deflt = 0;
3319 }
3320
3321err:
3322 return 0;
3323}
13ae6645
AD		 3324#else
3325static inline int vt_bind(struct con_driver *con)
3326{
3327 return 0;
3328}
3329static inline int vt_unbind(struct con_driver *con)
3330{
3331 return 0;
3332}
3333#endif /* CONFIG_VT_HW_CONSOLE_BINDING */
6db4063c 3334
805952a8 3335static ssize_t store_bind(struct device *dev, struct device_attribute *attr,
6db4063c
AD		 3336 const char *buf, size_t count)
3337{
805952a8 3338 struct con_driver *con = dev_get_drvdata(dev);
6db4063c
AD		 3339 int bind = simple_strtoul(buf, NULL, 0);
3340
3341 if (bind)
3342 vt_bind(con);
3343 else
3344 vt_unbind(con);
3345
3346 return count;
3347}
3348
805952a8
GKH		 3349static ssize_t show_bind(struct device *dev, struct device_attribute *attr,
3350 char *buf)
6db4063c 3351{
805952a8 3352 struct con_driver *con = dev_get_drvdata(dev);
6db4063c
AD		 3353 int bind = con_is_bound(con->con);
3354
3355 return snprintf(buf, PAGE_SIZE, "%i\n", bind);
3356}
3357
805952a8
GKH		 3358static ssize_t show_name(struct device *dev, struct device_attribute *attr,
3359 char *buf)
6db4063c 3360{
805952a8 3361 struct con_driver *con = dev_get_drvdata(dev);
6db4063c
AD		 3362
3363 return snprintf(buf, PAGE_SIZE, "%s %s\n",
3364 (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)",
3365 con->desc);
3366
3367}
3368
805952a8 3369static struct device_attribute device_attrs[] = {
6db4063c
AD		 3370 __ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind),
3371 __ATTR(name, S_IRUGO, show_name, NULL),
3372};
3373
805952a8 3374static int vtconsole_init_device(struct con_driver *con)
6db4063c
AD		 3375{
3376 int i;
928e964f 3377 int error = 0;
6db4063c 3378
928e964f 3379 con->flag |= CON_DRIVER_FLAG_ATTR;
805952a8
GKH		 3380 dev_set_drvdata(con->dev, con);
3381 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3382 error = device_create_file(con->dev, &device_attrs[i]);
928e964f
AD		 3383 if (error)
3384 break;
3385 }
6db4063c 3386
928e964f
AD		 3387 if (error) {
3388 while (--i >= 0)
805952a8 3389 device_remove_file(con->dev, &device_attrs[i]);
928e964f
AD		 3390 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3391 }
3392
3393 return error;
6db4063c
AD		 3394}
3395
805952a8 3396static void vtconsole_deinit_device(struct con_driver *con)
6db4063c
AD		 3397{
3398 int i;
3399
928e964f 3400 if (con->flag & CON_DRIVER_FLAG_ATTR) {
805952a8
GKH		 3401 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3402 device_remove_file(con->dev, &device_attrs[i]);
928e964f
AD		 3403 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3404 }
6db4063c
AD		 3405}
3406
3e795de7
AD		 3407/**
3408 * con_is_bound - checks if driver is bound to the console
3409 * @csw: console driver
3410 *
3411 * RETURNS: zero if unbound, nonzero if bound
3412 *
3413 * Drivers can call this and if zero, they should release
3414 * all resources allocated on con_startup()
3415 */
3416int con_is_bound(const struct consw *csw)
3417{
3418 int i, bound = 0;
3419
3420 for (i = 0; i < MAX_NR_CONSOLES; i++) {
3421 if (con_driver_map[i] == csw) {
3422 bound = 1;
3423 break;
3424 }
3425 }
3426
3427 return bound;
3428}
3429EXPORT_SYMBOL(con_is_bound);
3430
b45cfba4
JB		 3431/**
3432 * con_debug_enter - prepare the console for the kernel debugger
3433 * @sw: console driver
3434 *
3435 * Called when the console is taken over by the kernel debugger, this
3436 * function needs to save the current console state, then put the console
3437 * into a state suitable for the kernel debugger.
3438 *
3439 * RETURNS:
3440 * Zero on success, nonzero if a failure occurred when trying to prepare
3441 * the console for the debugger.
3442 */
3443int con_debug_enter(struct vc_data *vc)
3444{
3445 int ret = 0;
3446
3447 saved_fg_console = fg_console;
3448 saved_last_console = last_console;
3449 saved_want_console = want_console;
3450 saved_vc_mode = vc->vc_mode;
beed5336 3451 saved_console_blanked = console_blanked;
b45cfba4
JB		 3452 vc->vc_mode = KD_TEXT;
3453 console_blanked = 0;
3454 if (vc->vc_sw->con_debug_enter)
3455 ret = vc->vc_sw->con_debug_enter(vc);
81d44507
JW		 3456#ifdef CONFIG_KGDB_KDB
3457 /* Set the initial LINES variable if it is not already set */
3458 if (vc->vc_rows < 999) {
3459 int linecount;
3460 char lns[4];
3461 const char *setargs[3] = {
3462 "set",
3463 "LINES",
3464 lns,
3465 };
3466 if (kdbgetintenv(setargs[0], &linecount)) {
3467 snprintf(lns, 4, "%i", vc->vc_rows);
3468 kdb_set(2, setargs);
3469 }
3470 }
17b572e8
JW		 3471 if (vc->vc_cols < 999) {
3472 int colcount;
3473 char cols[4];
3474 const char *setargs[3] = {
3475 "set",
3476 "COLUMNS",
3477 cols,
3478 };
3479 if (kdbgetintenv(setargs[0], &colcount)) {
3480 snprintf(cols, 4, "%i", vc->vc_cols);
3481 kdb_set(2, setargs);
3482 }
3483 }
81d44507 3484#endif /* CONFIG_KGDB_KDB */
b45cfba4
JB		 3485 return ret;
3486}
3487EXPORT_SYMBOL_GPL(con_debug_enter);
3488
3489/**
3490 * con_debug_leave - restore console state
3491 * @sw: console driver
3492 *
3493 * Restore the console state to what it was before the kernel debugger
3494 * was invoked.
3495 *
3496 * RETURNS:
3497 * Zero on success, nonzero if a failure occurred when trying to restore
3498 * the console.
3499 */
3500int con_debug_leave(void)
3501{
3502 struct vc_data *vc;
3503 int ret = 0;
3504
3505 fg_console = saved_fg_console;
3506 last_console = saved_last_console;
3507 want_console = saved_want_console;
beed5336 3508 console_blanked = saved_console_blanked;
b45cfba4
JB		 3509 vc_cons[fg_console].d->vc_mode = saved_vc_mode;
3510
3511 vc = vc_cons[fg_console].d;
3512 if (vc->vc_sw->con_debug_leave)
3513 ret = vc->vc_sw->con_debug_leave(vc);
3514 return ret;
3515}
3516EXPORT_SYMBOL_GPL(con_debug_leave);
3517
50e244cc 3518static int do_register_con_driver(const struct consw *csw, int first, int last)
3e795de7
AD		 3519{
3520 struct module *owner = csw->owner;
3521 struct con_driver *con_driver;
3522 const char *desc;
3523 int i, retval = 0;
3524
50e244cc
AC		 3525 WARN_CONSOLE_UNLOCKED();
3526
3e795de7
AD		 3527 if (!try_module_get(owner))
3528 return -ENODEV;
3529
3e795de7
AD		 3530 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3531 con_driver = &registered_con_driver[i];
3532
3533 /* already registered */
3534 if (con_driver->con == csw)
c55c63c6 3535 retval = -EBUSY;
3e795de7
AD		 3536 }
3537
3538 if (retval)
3539 goto err;
3540
3541 desc = csw->con_startup();
0fff1b1f
JS		 3542 if (!desc) {
3543 retval = -ENODEV;
3e795de7 3544 goto err;
0fff1b1f 3545 }
3e795de7
AD		 3546
3547 retval = -EINVAL;
3548
3549 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3550 con_driver = &registered_con_driver[i];
3551
3552 if (con_driver->con == NULL) {
3553 con_driver->con = csw;
3554 con_driver->desc = desc;
6db4063c
AD		 3555 con_driver->node = i;
3556 con_driver->flag = CON_DRIVER_FLAG_MODULE |
3e795de7
AD		 3557 CON_DRIVER_FLAG_INIT;
3558 con_driver->first = first;
3559 con_driver->last = last;
3560 retval = 0;
3561 break;
3562 }
3563 }
3564
6db4063c
AD		 3565 if (retval)
3566 goto err;
3567
d81ed103 3568 con_driver->dev = device_create(vtconsole_class, NULL,
47aa5793
GKH		 3569 MKDEV(0, con_driver->node),
3570 NULL, "vtcon%i",
3571 con_driver->node);
6db4063c 3572
805952a8
GKH		 3573 if (IS_ERR(con_driver->dev)) {
3574 printk(KERN_WARNING "Unable to create device for %s; "
6db4063c 3575 "errno = %ld\n", con_driver->desc,
805952a8
GKH		 3576 PTR_ERR(con_driver->dev));
3577 con_driver->dev = NULL;
6db4063c 3578 } else {
805952a8 3579 vtconsole_init_device(con_driver);
6db4063c 3580 }
928e964f 3581
3e795de7 3582err:
3e795de7
AD		 3583 module_put(owner);
3584 return retval;
3585}
50e244cc
AC		 3586
3587/**
3588 * register_con_driver - register console driver to console layer
3589 * @csw: console driver
3590 * @first: the first console to take over, minimum value is 0
3591 * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1
3592 *
3593 * DESCRIPTION: This function registers a console driver which can later
3594 * bind to a range of consoles specified by @first and @last. It will
3595 * also initialize the console driver by calling con_startup().
3596 */
3597int register_con_driver(const struct consw *csw, int first, int last)
3598{
3599 int retval;
3600
3601 console_lock();
3602 retval = do_register_con_driver(csw, first, last);
3603 console_unlock();
3604 return retval;
3605}
3e795de7
AD		 3606EXPORT_SYMBOL(register_con_driver);
3607
3608/**
3609 * unregister_con_driver - unregister console driver from console layer
3610 * @csw: console driver
3611 *
3612 * DESCRIPTION: All drivers that registers to the console layer must
3613 * call this function upon exit, or if the console driver is in a state
3614 * where it won't be able to handle console services, such as the
3615 * framebuffer console without loaded framebuffer drivers.
3616 *
3617 * The driver must unbind first prior to unregistration.
3618 */
3619int unregister_con_driver(const struct consw *csw)
3620{
e93a9a86 3621 int retval;
3e795de7 3622
ac751efa 3623 console_lock();
e93a9a86
TI		 3624 retval = do_unregister_con_driver(csw);
3625 console_unlock();
3626 return retval;
3627}
3628EXPORT_SYMBOL(unregister_con_driver);
3629
3630int do_unregister_con_driver(const struct consw *csw)
3631{
3632 int i, retval = -ENODEV;
3e795de7
AD		 3633
3634 /* cannot unregister a bound driver */
3635 if (con_is_bound(csw))
3636 goto err;
3637
3638 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3639 struct con_driver *con_driver = &registered_con_driver[i];
3640
3641 if (con_driver->con == csw &&
6db4063c 3642 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
805952a8
GKH		 3643 vtconsole_deinit_device(con_driver);
3644 device_destroy(vtconsole_class,
3645 MKDEV(0, con_driver->node));
3e795de7
AD		 3646 con_driver->con = NULL;
3647 con_driver->desc = NULL;
805952a8 3648 con_driver->dev = NULL;
6db4063c 3649 con_driver->node = 0;
3e795de7
AD		 3650 con_driver->flag = 0;
3651 con_driver->first = 0;
3652 con_driver->last = 0;
3653 retval = 0;
3654 break;
3655 }
3656 }
3e795de7 3657err:
3e795de7
AD		 3658 return retval;
3659}
e93a9a86 3660EXPORT_SYMBOL_GPL(do_unregister_con_driver);
3e795de7
AD		 3661
3662/*
3663 * If we support more console drivers, this function is used
3664 * when a driver wants to take over some existing consoles
3665 * and become default driver for newly opened ones.
3666 *
50e244cc
AC		 3667 * take_over_console is basically a register followed by unbind
3668 */
3669int do_take_over_console(const struct consw *csw, int first, int last, int deflt)
3670{
3671 int err;
3672
3673 err = do_register_con_driver(csw, first, last);
3674 /*
3675 * If we get an busy error we still want to bind the console driver
3676 * and return success, as we may have unbound the console driver
3677 * but not unregistered it.
3678 */
3679 if (err == -EBUSY)
3680 err = 0;
3681 if (!err)
3682 do_bind_con_driver(csw, first, last, deflt);
3683
3684 return err;
3685}
3686EXPORT_SYMBOL_GPL(do_take_over_console);
3687
3688/*
3689 * If we support more console drivers, this function is used
3690 * when a driver wants to take over some existing consoles
3691 * and become default driver for newly opened ones.
3692 *
3693 * take_over_console is basically a register followed by unbind
3e795de7
AD		 3694 */
3695int take_over_console(const struct consw *csw, int first, int last, int deflt)
3696{
3697 int err;
3698
3699 err = register_con_driver(csw, first, last);
50e244cc
AC		 3700 /*
3701 * If we get an busy error we still want to bind the console driver
c55c63c6 3702 * and return success, as we may have unbound the console driver
50e244cc
AC		 3703 * but not unregistered it.
3704 */
c55c63c6
DA		 3705 if (err == -EBUSY)
3706 err = 0;
3e795de7 3707 if (!err)
6db4063c 3708 bind_con_driver(csw, first, last, deflt);
3e795de7
AD		 3709
3710 return err;
3711}
3712
3713/*
3714 * give_up_console is a wrapper to unregister_con_driver. It will only
3715 * work if driver is fully unbound.
3716 */
3717void give_up_console(const struct consw *csw)
3718{
3719 unregister_con_driver(csw);
3720}
3721
6db4063c 3722static int __init vtconsole_class_init(void)
3e795de7 3723{
6db4063c 3724 int i;
3e795de7 3725
6db4063c
AD		 3726 vtconsole_class = class_create(THIS_MODULE, "vtconsole");
3727 if (IS_ERR(vtconsole_class)) {
3728 printk(KERN_WARNING "Unable to create vt console class; "
3729 "errno = %ld\n", PTR_ERR(vtconsole_class));
3730 vtconsole_class = NULL;
3731 }
3e795de7 3732
6db4063c 3733 /* Add system drivers to sysfs */
3e795de7
AD		 3734 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3735 struct con_driver *con = &registered_con_driver[i];
3736
805952a8 3737 if (con->con && !con->dev) {
d81ed103 3738 con->dev = device_create(vtconsole_class, NULL,
47aa5793
GKH		 3739 MKDEV(0, con->node),
3740 NULL, "vtcon%i",
3741 con->node);
6db4063c 3742
805952a8 3743 if (IS_ERR(con->dev)) {
6db4063c 3744 printk(KERN_WARNING "Unable to create "
805952a8
GKH		 3745 "device for %s; errno = %ld\n",
3746 con->desc, PTR_ERR(con->dev));
3747 con->dev = NULL;
6db4063c 3748 } else {
805952a8 3749 vtconsole_init_device(con);
6db4063c 3750 }
3e795de7 3751 }
3e795de7
AD		 3752 }
3753
3e795de7
AD		 3754 return 0;
3755}
6db4063c 3756postcore_initcall(vtconsole_class_init);
3e795de7 3757
1da177e4
LT		 3758#endif
3759
3760/*
3761 * Screen blanking
3762 */
3763
403aac96 3764static int set_vesa_blanking(char __user *p)
1da177e4 3765{
403aac96
YY		 3766 unsigned int mode;
3767
3768 if (get_user(mode, p + 1))
3769 return -EFAULT;
3770
3771 vesa_blank_mode = (mode < 4) ? mode : 0;
3772 return 0;
1da177e4
LT		 3773}
3774
1da177e4
LT		 3775void do_blank_screen(int entering_gfx)
3776{
3777 struct vc_data *vc = vc_cons[fg_console].d;
3778 int i;
3779
3780 WARN_CONSOLE_UNLOCKED();
3781
3782 if (console_blanked) {
3783 if (blank_state == blank_vesa_wait) {
3784 blank_state = blank_off;
d060a321 3785 vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0);
1da177e4
LT		 3786 }
3787 return;
3788 }
1da177e4
LT		 3789
3790 /* entering graphics mode? */
3791 if (entering_gfx) {
3792 hide_cursor(vc);
3793 save_screen(vc);
3794 vc->vc_sw->con_blank(vc, -1, 1);
3795 console_blanked = fg_console + 1;
b6e8f00f 3796 blank_state = blank_off;
1da177e4
LT		 3797 set_origin(vc);
3798 return;
3799 }
3800
b6e8f00f 3801 if (blank_state != blank_normal_wait)
3802 return;
3803 blank_state = blank_off;
3804
1da177e4
LT		 3805 /* don't blank graphics */
3806 if (vc->vc_mode != KD_TEXT) {
3807 console_blanked = fg_console + 1;
3808 return;
3809 }
3810
3811 hide_cursor(vc);
3812 del_timer_sync(&console_timer);
3813 blank_timer_expired = 0;
3814
3815 save_screen(vc);
3816 /* In case we need to reset origin, blanking hook returns 1 */
d060a321 3817 i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0);
1da177e4
LT		 3818 console_blanked = fg_console + 1;
3819 if (i)
3820 set_origin(vc);
3821
3822 if (console_blank_hook && console_blank_hook(1))
3823 return;
3824
d060a321 3825 if (vesa_off_interval && vesa_blank_mode) {
030babac 3826 blank_state = blank_vesa_wait;
1da177e4
LT		 3827 mod_timer(&console_timer, jiffies + vesa_off_interval);
3828 }
8b92e87d 3829 vt_event_post(VT_EVENT_BLANK, vc->vc_num, vc->vc_num);
1da177e4
LT		 3830}
3831EXPORT_SYMBOL(do_blank_screen);
3832
3833/*
3834 * Called by timer as well as from vt_console_driver
3835 */
3836void do_unblank_screen(int leaving_gfx)
3837{
3838 struct vc_data *vc;
3839
3840 /* This should now always be called from a "sane" (read: can schedule)
3841 * context for the sake of the low level drivers, except in the special
3842 * case of oops_in_progress
3843 */
3844 if (!oops_in_progress)
3845 might_sleep();
3846
3847 WARN_CONSOLE_UNLOCKED();
3848
3849 ignore_poke = 0;
3850 if (!console_blanked)
3851 return;
3852 if (!vc_cons_allocated(fg_console)) {
3853 /* impossible */
1ffdda95
MSB		 3854 pr_warning("unblank_screen: tty %d not allocated ??\n",
3855 fg_console+1);
1da177e4
LT		 3856 return;
3857 }
3858 vc = vc_cons[fg_console].d;
8fd4bd22
JB		 3859 /* Try to unblank in oops case too */
3860 if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc))
1da177e4
LT		 3861 return; /* but leave console_blanked != 0 */
3862
3863 if (blankinterval) {
f324edc8 3864 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
1da177e4
LT		 3865 blank_state = blank_normal_wait;
3866 }
3867
3868 console_blanked = 0;
8fd4bd22 3869 if (vc->vc_sw->con_blank(vc, 0, leaving_gfx) || vt_force_oops_output(vc))
1da177e4
LT		 3870 /* Low-level driver cannot restore -> do it ourselves */
3871 update_screen(vc);
3872 if (console_blank_hook)
3873 console_blank_hook(0);
3874 set_palette(vc);
3875 set_cursor(vc);
8b92e87d 3876 vt_event_post(VT_EVENT_UNBLANK, vc->vc_num, vc->vc_num);
1da177e4
LT		 3877}
3878EXPORT_SYMBOL(do_unblank_screen);
3879
3880/*
3881 * This is called by the outside world to cause a forced unblank, mostly for
3882 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
3883 * call it with 1 as an argument and so force a mode restore... that may kill
3884 * X or at least garbage the screen but would also make the Oops visible...
3885 */
3886void unblank_screen(void)
3887{
3888 do_unblank_screen(0);
3889}
3890
3891/*
70522e12 3892 * We defer the timer blanking to work queue so it can take the console mutex
1da177e4 3893 * (console operations can still happen at irq time, but only from printk which
70522e12 3894 * has the console mutex. Not perfect yet, but better than no locking
1da177e4
LT		 3895 */
3896static void blank_screen_t(unsigned long dummy)
3897{
cc63b1e1 3898 if (unlikely(!keventd_up())) {
f324edc8 3899 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
cc63b1e1
JB		 3900 return;
3901 }
1da177e4
LT		 3902 blank_timer_expired = 1;
3903 schedule_work(&console_work);
3904}
3905
3906void poke_blanked_console(void)
3907{
3908 WARN_CONSOLE_UNLOCKED();
3909
3910 /* Add this so we quickly catch whoever might call us in a non
3911 * safe context. Nowadays, unblank_screen() isn't to be called in
3912 * atomic contexts and is allowed to schedule (with the special case
3913 * of oops_in_progress, but that isn't of any concern for this
3914 * function. --BenH.
3915 */
3916 might_sleep();
3917
3918 /* This isn't perfectly race free, but a race here would be mostly harmless,
3919 * at worse, we'll do a spurrious blank and it's unlikely
3920 */
3921 del_timer(&console_timer);
3922 blank_timer_expired = 0;
3923
3924 if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS)
3925 return;
3926 if (console_blanked)
3927 unblank_screen();
3928 else if (blankinterval) {
f324edc8 3929 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
1da177e4
LT		 3930 blank_state = blank_normal_wait;
3931 }
3932}
3933
3934/*
3935 * Palettes
3936 */
3937
3938static void set_palette(struct vc_data *vc)
3939{
3940 WARN_CONSOLE_UNLOCKED();
3941
3942 if (vc->vc_mode != KD_GRAPHICS)
3943 vc->vc_sw->con_set_palette(vc, color_table);
3944}
3945
1da177e4
LT		 3946/*
3947 * Load palette into the DAC registers. arg points to a colour
3948 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
3949 */
3950
3951int con_set_cmap(unsigned char __user *arg)
3952{
871bdea6
MG		 3953 int i, j, k;
3954 unsigned char colormap[3*16];
3955
3956 if (copy_from_user(colormap, arg, sizeof(colormap)))
3957 return -EFAULT;
1da177e4 3958
ac751efa 3959 console_lock();
871bdea6
MG		 3960 for (i = k = 0; i < 16; i++) {
3961 default_red[i] = colormap[k++];
3962 default_grn[i] = colormap[k++];
3963 default_blu[i] = colormap[k++];
3964 }
3965 for (i = 0; i < MAX_NR_CONSOLES; i++) {
3966 if (!vc_cons_allocated(i))
3967 continue;
3968 for (j = k = 0; j < 16; j++) {
3969 vc_cons[i].d->vc_palette[k++] = default_red[j];
3970 vc_cons[i].d->vc_palette[k++] = default_grn[j];
3971 vc_cons[i].d->vc_palette[k++] = default_blu[j];
3972 }
3973 set_palette(vc_cons[i].d);
3974 }
ac751efa 3975 console_unlock();
1da177e4 3976
871bdea6 3977 return 0;
1da177e4
LT		 3978}
3979
3980int con_get_cmap(unsigned char __user *arg)
3981{
871bdea6
MG		 3982 int i, k;
3983 unsigned char colormap[3*16];
1da177e4 3984
ac751efa 3985 console_lock();
871bdea6
MG		 3986 for (i = k = 0; i < 16; i++) {
3987 colormap[k++] = default_red[i];
3988 colormap[k++] = default_grn[i];
3989 colormap[k++] = default_blu[i];
3990 }
ac751efa 3991 console_unlock();
1da177e4 3992
871bdea6
MG		 3993 if (copy_to_user(arg, colormap, sizeof(colormap)))
3994 return -EFAULT;
3995
3996 return 0;
1da177e4
LT		 3997}
3998
3999void reset_palette(struct vc_data *vc)
4000{
4001 int j, k;
4002 for (j=k=0; j<16; j++) {
4003 vc->vc_palette[k++] = default_red[j];
4004 vc->vc_palette[k++] = default_grn[j];
4005 vc->vc_palette[k++] = default_blu[j];
4006 }
4007 set_palette(vc);
4008}
4009
4010/*
4011 * Font switching
4012 *
4013 * Currently we only support fonts up to 32 pixels wide, at a maximum height
4014 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
4015 * depending on width) reserved for each character which is kinda wasty, but
4016 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
25985edc 4017 * is up to the actual low-level console-driver convert data into its favorite
1da177e4
LT		 4018 * format (maybe we should add a `fontoffset' field to the `display'
4019 * structure so we won't have to convert the fontdata all the time.
4020 * /Jes
4021 */
4022
4023#define max_font_size 65536
4024
4025static int con_font_get(struct vc_data *vc, struct console_font_op *op)
4026{
4027 struct console_font font;
4028 int rc = -EINVAL;
4029 int c;
4030
1da177e4
LT		 4031 if (op->data) {
4032 font.data = kmalloc(max_font_size, GFP_KERNEL);
4033 if (!font.data)
4034 return -ENOMEM;
4035 } else
4036 font.data = NULL;
4037
ac751efa 4038 console_lock();
edab558f
AC		 4039 if (vc->vc_mode != KD_TEXT)
4040 rc = -EINVAL;
4041 else if (vc->vc_sw->con_font_get)
1da177e4
LT		 4042 rc = vc->vc_sw->con_font_get(vc, &font);
4043 else
4044 rc = -ENOSYS;
ac751efa 4045 console_unlock();
1da177e4
LT		 4046
4047 if (rc)
4048 goto out;
4049
4050 c = (font.width+7)/8 * 32 * font.charcount;
04f378b1 4051
1da177e4
LT		 4052 if (op->data && font.charcount > op->charcount)
4053 rc = -ENOSPC;
4054 if (!(op->flags & KD_FONT_FLAG_OLD)) {
4055 if (font.width > op->width || font.height > op->height)
4056 rc = -ENOSPC;
4057 } else {
4058 if (font.width != 8)
4059 rc = -EIO;
4060 else if ((op->height && font.height > op->height) ||
4061 font.height > 32)
4062 rc = -ENOSPC;
4063 }
4064 if (rc)
4065 goto out;
4066
4067 op->height = font.height;
4068 op->width = font.width;
4069 op->charcount = font.charcount;
4070
4071 if (op->data && copy_to_user(op->data, font.data, c))
4072 rc = -EFAULT;
4073
4074out:
4075 kfree(font.data);
4076 return rc;
4077}
4078
4079static int con_font_set(struct vc_data *vc, struct console_font_op *op)
4080{
4081 struct console_font font;
4082 int rc = -EINVAL;
4083 int size;
4084
4085 if (vc->vc_mode != KD_TEXT)
4086 return -EINVAL;
4087 if (!op->data)
4088 return -EINVAL;
4089 if (op->charcount > 512)
4090 return -EINVAL;
4091 if (!op->height) { /* Need to guess font height [compat] */
4092 int h, i;
4093 u8 __user *charmap = op->data;
4094 u8 tmp;
4095
4096 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
4097 so that we can get rid of this soon */
4098 if (!(op->flags & KD_FONT_FLAG_OLD))
4099 return -EINVAL;
4100 for (h = 32; h > 0; h--)
4101 for (i = 0; i < op->charcount; i++) {
4102 if (get_user(tmp, &charmap[32*i+h-1]))
4103 return -EFAULT;
4104 if (tmp)
4105 goto nonzero;
4106 }
4107 return -EINVAL;
4108 nonzero:
4109 op->height = h;
4110 }
4111 if (op->width <= 0 || op->width > 32 || op->height > 32)
4112 return -EINVAL;
4113 size = (op->width+7)/8 * 32 * op->charcount;
4114 if (size > max_font_size)
4115 return -ENOSPC;
4116 font.charcount = op->charcount;
4117 font.height = op->height;
4118 font.width = op->width;
9b71ca20
JL		 4119 font.data = memdup_user(op->data, size);
4120 if (IS_ERR(font.data))
4121 return PTR_ERR(font.data);
ac751efa 4122 console_lock();
edab558f
AC		 4123 if (vc->vc_mode != KD_TEXT)
4124 rc = -EINVAL;
4125 else if (vc->vc_sw->con_font_set)
1da177e4
LT		 4126 rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
4127 else
4128 rc = -ENOSYS;
ac751efa 4129 console_unlock();
1da177e4
LT		 4130 kfree(font.data);
4131 return rc;
4132}
4133
4134static int con_font_default(struct vc_data *vc, struct console_font_op *op)
4135{
4136 struct console_font font = {.width = op->width, .height = op->height};
4137 char name[MAX_FONT_NAME];
4138 char *s = name;
4139 int rc;
4140
1da177e4
LT		 4141
4142 if (!op->data)
4143 s = NULL;
4144 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0)
4145 return -EFAULT;
4146 else
4147 name[MAX_FONT_NAME - 1] = 0;
4148
ac751efa 4149 console_lock();
edab558f
AC		 4150 if (vc->vc_mode != KD_TEXT) {
4151 console_unlock();
4152 return -EINVAL;
4153 }
1da177e4
LT		 4154 if (vc->vc_sw->con_font_default)
4155 rc = vc->vc_sw->con_font_default(vc, &font, s);
4156 else
4157 rc = -ENOSYS;
ac751efa 4158 console_unlock();
1da177e4
LT		 4159 if (!rc) {
4160 op->width = font.width;
4161 op->height = font.height;
4162 }
4163 return rc;
4164}
4165
4166static int con_font_copy(struct vc_data *vc, struct console_font_op *op)
4167{
4168 int con = op->height;
4169 int rc;
4170
1da177e4 4171
ac751efa 4172 console_lock();
edab558f
AC		 4173 if (vc->vc_mode != KD_TEXT)
4174 rc = -EINVAL;
4175 else if (!vc->vc_sw->con_font_copy)
1da177e4
LT		 4176 rc = -ENOSYS;
4177 else if (con < 0 || !vc_cons_allocated(con))
4178 rc = -ENOTTY;
4179 else if (con == vc->vc_num) /* nothing to do */
4180 rc = 0;
4181 else
4182 rc = vc->vc_sw->con_font_copy(vc, con);
ac751efa 4183 console_unlock();
1da177e4
LT		 4184 return rc;
4185}
4186
4187int con_font_op(struct vc_data *vc, struct console_font_op *op)
4188{
4189 switch (op->op) {
4190 case KD_FONT_OP_SET:
4191 return con_font_set(vc, op);
4192 case KD_FONT_OP_GET:
4193 return con_font_get(vc, op);
4194 case KD_FONT_OP_SET_DEFAULT:
4195 return con_font_default(vc, op);
4196 case KD_FONT_OP_COPY:
4197 return con_font_copy(vc, op);
4198 }
4199 return -ENOSYS;
4200}
4201
4202/*
4203 * Interface exported to selection and vcs.
4204 */
4205
4206/* used by selection */
4207u16 screen_glyph(struct vc_data *vc, int offset)
4208{
4209 u16 w = scr_readw(screenpos(vc, offset, 1));
4210 u16 c = w & 0xff;
4211
4212 if (w & vc->vc_hi_font_mask)
4213 c |= 0x100;
4214 return c;
4215}
f7511d5f 4216EXPORT_SYMBOL_GPL(screen_glyph);
1da177e4
LT		 4217
4218/* used by vcs - note the word offset */
4219unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed)
4220{
4221 return screenpos(vc, 2 * w_offset, viewed);
4222}
4223
4224void getconsxy(struct vc_data *vc, unsigned char *p)
4225{
4226 p[0] = vc->vc_x;
4227 p[1] = vc->vc_y;
4228}
4229
4230void putconsxy(struct vc_data *vc, unsigned char *p)
4231{
9477e260 4232 hide_cursor(vc);
1da177e4
LT		 4233 gotoxy(vc, p[0], p[1]);
4234 set_cursor(vc);
4235}
4236
4237u16 vcs_scr_readw(struct vc_data *vc, const u16 *org)
4238{
4239 if ((unsigned long)org == vc->vc_pos && softcursor_original != -1)
4240 return softcursor_original;
4241 return scr_readw(org);
4242}
4243
4244void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org)
4245{
4246 scr_writew(val, org);
4247 if ((unsigned long)org == vc->vc_pos) {
4248 softcursor_original = -1;
4249 add_softcursor(vc);
4250 }
4251}
4252
432c9ed2
NP		 4253void vcs_scr_updated(struct vc_data *vc)
4254{
4255 notify_update(vc);
4256}
4257
1da177e4
LT		 4258/*
4259 * Visible symbols for modules
4260 */
4261
4262EXPORT_SYMBOL(color_table);
4263EXPORT_SYMBOL(default_red);
4264EXPORT_SYMBOL(default_grn);
4265EXPORT_SYMBOL(default_blu);
4266EXPORT_SYMBOL(update_region);
4267EXPORT_SYMBOL(redraw_screen);
4268EXPORT_SYMBOL(vc_resize);
4269EXPORT_SYMBOL(fg_console);
4270EXPORT_SYMBOL(console_blank_hook);
4271EXPORT_SYMBOL(console_blanked);
4272EXPORT_SYMBOL(vc_cons);
f6c06b68 4273EXPORT_SYMBOL(global_cursor_default);
1da177e4
LT		 4274#ifndef VT_SINGLE_DRIVER
4275EXPORT_SYMBOL(take_over_console);
4276EXPORT_SYMBOL(give_up_console);
4277#endif
kernel source for telekom puls (alcatel/mediatek)