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ARM: dts: imx28-evk: add the RTS/CTS property for auart0
[thirdparty/linux.git] / drivers / tty / vt / vt.c
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1da177e4 1/*
1da177e4
LT		 2 * Copyright (C) 1991, 1992 Linus Torvalds
3 */
4
5/*
6 * Hopefully this will be a rather complete VT102 implementation.
7 *
8 * Beeping thanks to John T Kohl.
9 *
10 * Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics
11 * Chars, and VT100 enhancements by Peter MacDonald.
12 *
13 * Copy and paste function by Andrew Haylett,
14 * some enhancements by Alessandro Rubini.
15 *
16 * Code to check for different video-cards mostly by Galen Hunt,
17 * <g-hunt@ee.utah.edu>
18 *
19 * Rudimentary ISO 10646/Unicode/UTF-8 character set support by
20 * Markus Kuhn, <mskuhn@immd4.informatik.uni-erlangen.de>.
21 *
22 * Dynamic allocation of consoles, aeb@cwi.nl, May 1994
23 * Resizing of consoles, aeb, 940926
24 *
25 * Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94
26 * <poe@daimi.aau.dk>
27 *
28 * User-defined bell sound, new setterm control sequences and printk
29 * redirection by Martin Mares <mj@k332.feld.cvut.cz> 19-Nov-95
30 *
31 * APM screenblank bug fixed Takashi Manabe <manabe@roy.dsl.tutics.tut.jp>
32 *
33 * Merge with the abstract console driver by Geert Uytterhoeven
34 * <geert@linux-m68k.org>, Jan 1997.
35 *
36 * Original m68k console driver modifications by
37 *
38 * - Arno Griffioen <arno@usn.nl>
39 * - David Carter <carter@cs.bris.ac.uk>
40 *
41 * The abstract console driver provides a generic interface for a text
42 * console. It supports VGA text mode, frame buffer based graphical consoles
43 * and special graphics processors that are only accessible through some
44 * registers (e.g. a TMS340x0 GSP).
45 *
46 * The interface to the hardware is specified using a special structure
47 * (struct consw) which contains function pointers to console operations
48 * (see <linux/console.h> for more information).
49 *
50 * Support for changeable cursor shape
51 * by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997
52 *
53 * Ported to i386 and con_scrolldelta fixed
54 * by Emmanuel Marty <core@ggi-project.org>, April 1998
55 *
56 * Resurrected character buffers in videoram plus lots of other trickery
57 * by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998
58 *
59 * Removed old-style timers, introduced console_timer, made timer
e1f8e874 60 * deletion SMP-safe. 17Jun00, Andrew Morton
1da177e4
LT		 61 *
62 * Removed console_lock, enabled interrupts across all console operations
63 * 13 March 2001, Andrew Morton
d4328b40
AT		 64 *
65 * Fixed UTF-8 mode so alternate charset modes always work according
66 * to control sequences interpreted in do_con_trol function
67 * preserving backward VT100 semigraphics compatibility,
68 * malformed UTF sequences represented as sequences of replacement glyphs,
69 * original codes or '?' as a last resort if replacement glyph is undefined
70 * by Adam Tla/lka <atlka@pg.gda.pl>, Aug 2006
1da177e4
LT		 71 */
72
73#include <linux/module.h>
74#include <linux/types.h>
75#include <linux/sched.h>
76#include <linux/tty.h>
77#include <linux/tty_flip.h>
78#include <linux/kernel.h>
79#include <linux/string.h>
80#include <linux/errno.h>
81#include <linux/kd.h>
82#include <linux/slab.h>
83#include <linux/major.h>
84#include <linux/mm.h>
85#include <linux/console.h>
86#include <linux/init.h>
c831c338 87#include <linux/mutex.h>
1da177e4
LT		 88#include <linux/vt_kern.h>
89#include <linux/selection.h>
90#include <linux/tiocl.h>
91#include <linux/kbd_kern.h>
92#include <linux/consolemap.h>
93#include <linux/timer.h>
94#include <linux/interrupt.h>
1da177e4 95#include <linux/workqueue.h>
1da177e4
LT		 96#include <linux/pm.h>
97#include <linux/font.h>
98#include <linux/bitops.h>
b293d758 99#include <linux/notifier.h>
d81ed103
AC		 100#include <linux/device.h>
101#include <linux/io.h>
d81ed103 102#include <linux/uaccess.h>
81d44507 103#include <linux/kdb.h>
74c807ce 104#include <linux/ctype.h>
1da177e4 105
3e795de7 106#define MAX_NR_CON_DRIVER 16
1da177e4 107
6db4063c 108#define CON_DRIVER_FLAG_MODULE 1
928e964f
AD		 109#define CON_DRIVER_FLAG_INIT 2
110#define CON_DRIVER_FLAG_ATTR 4
3e795de7
AD		 111
112struct con_driver {
113 const struct consw *con;
114 const char *desc;
805952a8 115 struct device *dev;
6db4063c 116 int node;
3e795de7
AD		 117 int first;
118 int last;
119 int flag;
120};
121
122static struct con_driver registered_con_driver[MAX_NR_CON_DRIVER];
1da177e4
LT		 123const struct consw *conswitchp;
124
125/* A bitmap for codes <32. A bit of 1 indicates that the code
126 * corresponding to that bit number invokes some special action
127 * (such as cursor movement) and should not be displayed as a
128 * glyph unless the disp_ctrl mode is explicitly enabled.
129 */
130#define CTRL_ACTION 0x0d00ff81
131#define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */
132
133/*
134 * Here is the default bell parameters: 750HZ, 1/8th of a second
135 */
136#define DEFAULT_BELL_PITCH 750
137#define DEFAULT_BELL_DURATION (HZ/8)
138
1da177e4
LT		 139struct vc vc_cons [MAX_NR_CONSOLES];
140
141#ifndef VT_SINGLE_DRIVER
142static const struct consw *con_driver_map[MAX_NR_CONSOLES];
143#endif
144
145static int con_open(struct tty_struct *, struct file *);
146static void vc_init(struct vc_data *vc, unsigned int rows,
147 unsigned int cols, int do_clear);
148static void gotoxy(struct vc_data *vc, int new_x, int new_y);
149static void save_cur(struct vc_data *vc);
150static void reset_terminal(struct vc_data *vc, int do_clear);
151static void con_flush_chars(struct tty_struct *tty);
403aac96 152static int set_vesa_blanking(char __user *p);
1da177e4
LT		 153static void set_cursor(struct vc_data *vc);
154static void hide_cursor(struct vc_data *vc);
65f27f38 155static void console_callback(struct work_struct *ignored);
1da177e4
LT		 156static void blank_screen_t(unsigned long dummy);
157static void set_palette(struct vc_data *vc);
158
159static int printable; /* Is console ready for printing? */
77bf2bab 160int default_utf8 = true;
042f10ec 161module_param(default_utf8, int, S_IRUGO | S_IWUSR);
f6c06b68
MG		 162int global_cursor_default = -1;
163module_param(global_cursor_default, int, S_IRUGO | S_IWUSR);
1da177e4 164
9ea9a886
CL		 165static int cur_default = CUR_DEFAULT;
166module_param(cur_default, int, S_IRUGO | S_IWUSR);
167
1da177e4
LT		 168/*
169 * ignore_poke: don't unblank the screen when things are typed. This is
170 * mainly for the privacy of braille terminal users.
171 */
172static int ignore_poke;
173
174int do_poke_blanked_console;
175int console_blanked;
176
177static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
1da177e4 178static int vesa_off_interval;
f324edc8
DM		 179static int blankinterval = 10*60;
180core_param(consoleblank, blankinterval, int, 0444);
1da177e4 181
65f27f38 182static DECLARE_WORK(console_work, console_callback);
1da177e4
LT		 183
184/*
185 * fg_console is the current virtual console,
186 * last_console is the last used one,
187 * want_console is the console we want to switch to,
b45cfba4 188 * saved_* variants are for save/restore around kernel debugger enter/leave
1da177e4
LT		 189 */
190int fg_console;
191int last_console;
192int want_console = -1;
fed891c8
JW		 193static int saved_fg_console;
194static int saved_last_console;
195static int saved_want_console;
196static int saved_vc_mode;
beed5336 197static int saved_console_blanked;
1da177e4
LT		 198
199/*
200 * For each existing display, we have a pointer to console currently visible
201 * on that display, allowing consoles other than fg_console to be refreshed
202 * appropriately. Unless the low-level driver supplies its own display_fg
203 * variable, we use this one for the "master display".
204 */
205static struct vc_data *master_display_fg;
206
207/*
208 * Unfortunately, we need to delay tty echo when we're currently writing to the
209 * console since the code is (and always was) not re-entrant, so we schedule
210 * all flip requests to process context with schedule-task() and run it from
211 * console_callback().
212 */
213
214/*
215 * For the same reason, we defer scrollback to the console callback.
216 */
217static int scrollback_delta;
218
219/*
220 * Hook so that the power management routines can (un)blank
221 * the console on our behalf.
222 */
223int (*console_blank_hook)(int);
224
40565f19 225static DEFINE_TIMER(console_timer, blank_screen_t, 0, 0);
1da177e4
LT		 226static int blank_state;
227static int blank_timer_expired;
228enum {
229 blank_off = 0,
230 blank_normal_wait,
231 blank_vesa_wait,
232};
233
fbc92a34
KS		 234/*
235 * /sys/class/tty/tty0/
236 *
237 * the attribute 'active' contains the name of the current vc
238 * console and it supports poll() to detect vc switches
239 */
240static struct device *tty0dev;
241
b293d758
ST		 242/*
243 * Notifier list for console events.
244 */
245static ATOMIC_NOTIFIER_HEAD(vt_notifier_list);
246
247int register_vt_notifier(struct notifier_block *nb)
248{
249 return atomic_notifier_chain_register(&vt_notifier_list, nb);
250}
251EXPORT_SYMBOL_GPL(register_vt_notifier);
252
253int unregister_vt_notifier(struct notifier_block *nb)
254{
255 return atomic_notifier_chain_unregister(&vt_notifier_list, nb);
256}
257EXPORT_SYMBOL_GPL(unregister_vt_notifier);
258
259static void notify_write(struct vc_data *vc, unsigned int unicode)
260{
502fcb79 261 struct vt_notifier_param param = { .vc = vc, .c = unicode };
b293d758
ST		 262 atomic_notifier_call_chain(&vt_notifier_list, VT_WRITE, &param);
263}
264
265static void notify_update(struct vc_data *vc)
266{
267 struct vt_notifier_param param = { .vc = vc };
268 atomic_notifier_call_chain(&vt_notifier_list, VT_UPDATE, &param);
269}
1da177e4
LT		 270/*
271 * Low-Level Functions
272 */
273
274#define IS_FG(vc) ((vc)->vc_num == fg_console)
275
276#ifdef VT_BUF_VRAM_ONLY
277#define DO_UPDATE(vc) 0
278#else
f700d6e5 279#define DO_UPDATE(vc) (CON_IS_VISIBLE(vc) && !console_blanked)
1da177e4
LT		 280#endif
281
282static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed)
283{
284 unsigned short *p;
285
286 if (!viewed)
287 p = (unsigned short *)(vc->vc_origin + offset);
288 else if (!vc->vc_sw->con_screen_pos)
289 p = (unsigned short *)(vc->vc_visible_origin + offset);
290 else
291 p = vc->vc_sw->con_screen_pos(vc, offset);
292 return p;
293}
294
e33ac1c1 295/* Called from the keyboard irq path.. */
1da177e4
LT		 296static inline void scrolldelta(int lines)
297{
e33ac1c1
AC		 298 /* FIXME */
299 /* scrolldelta needs some kind of consistency lock, but the BKL was
300 and still is not protecting versus the scheduled back end */
1da177e4
LT		 301 scrollback_delta += lines;
302 schedule_console_callback();
303}
304
305void schedule_console_callback(void)
306{
307 schedule_work(&console_work);
308}
309
310static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
311{
312 unsigned short *d, *s;
313
314 if (t+nr >= b)
315 nr = b - t - 1;
316 if (b > vc->vc_rows || t >= b || nr < 1)
317 return;
318 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr))
319 return;
320 d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
321 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr));
322 scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row);
386f40c8 323 scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_video_erase_char,
1da177e4
LT		 324 vc->vc_size_row * nr);
325}
326
327static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
328{
329 unsigned short *s;
330 unsigned int step;
331
332 if (t+nr >= b)
333 nr = b - t - 1;
334 if (b > vc->vc_rows || t >= b || nr < 1)
335 return;
336 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr))
337 return;
338 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
339 step = vc->vc_cols * nr;
340 scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row);
93f78da4 341 scr_memsetw(s, vc->vc_video_erase_char, 2 * step);
1da177e4
LT		 342}
343
344static void do_update_region(struct vc_data *vc, unsigned long start, int count)
345{
346#ifndef VT_BUF_VRAM_ONLY
347 unsigned int xx, yy, offset;
348 u16 *p;
349
350 p = (u16 *) start;
351 if (!vc->vc_sw->con_getxy) {
352 offset = (start - vc->vc_origin) / 2;
353 xx = offset % vc->vc_cols;
354 yy = offset / vc->vc_cols;
355 } else {
356 int nxx, nyy;
357 start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy);
358 xx = nxx; yy = nyy;
359 }
360 for(;;) {
361 u16 attrib = scr_readw(p) & 0xff00;
362 int startx = xx;
363 u16 *q = p;
364 while (xx < vc->vc_cols && count) {
365 if (attrib != (scr_readw(p) & 0xff00)) {
366 if (p > q)
367 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
368 startx = xx;
369 q = p;
370 attrib = scr_readw(p) & 0xff00;
371 }
372 p++;
373 xx++;
374 count--;
375 }
376 if (p > q)
377 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
378 if (!count)
379 break;
380 xx = 0;
381 yy++;
382 if (vc->vc_sw->con_getxy) {
383 p = (u16 *)start;
384 start = vc->vc_sw->con_getxy(vc, start, NULL, NULL);
385 }
386 }
387#endif
388}
389
390void update_region(struct vc_data *vc, unsigned long start, int count)
391{
392 WARN_CONSOLE_UNLOCKED();
393
394 if (DO_UPDATE(vc)) {
395 hide_cursor(vc);
396 do_update_region(vc, start, count);
397 set_cursor(vc);
398 }
399}
400
401/* Structure of attributes is hardware-dependent */
402
fa6ce9ab
JE		 403static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink,
404 u8 _underline, u8 _reverse, u8 _italic)
1da177e4
LT		 405{
406 if (vc->vc_sw->con_build_attr)
fa6ce9ab
JE		 407 return vc->vc_sw->con_build_attr(vc, _color, _intensity,
408 _blink, _underline, _reverse, _italic);
1da177e4
LT		 409
410#ifndef VT_BUF_VRAM_ONLY
411/*
412 * ++roman: I completely changed the attribute format for monochrome
413 * mode (!can_do_color). The formerly used MDA (monochrome display
414 * adapter) format didn't allow the combination of certain effects.
415 * Now the attribute is just a bit vector:
416 * Bit 0..1: intensity (0..2)
417 * Bit 2 : underline
418 * Bit 3 : reverse
419 * Bit 7 : blink
420 */
421 {
c9e587ab 422 u8 a = _color;
1da177e4
LT		 423 if (!vc->vc_can_do_color)
424 return _intensity |
fa6ce9ab 425 (_italic ? 2 : 0) |
1da177e4
LT		 426 (_underline ? 4 : 0) |
427 (_reverse ? 8 : 0) |
428 (_blink ? 0x80 : 0);
fa6ce9ab
JE		 429 if (_italic)
430 a = (a & 0xF0) | vc->vc_itcolor;
431 else if (_underline)
1da177e4
LT		 432 a = (a & 0xf0) | vc->vc_ulcolor;
433 else if (_intensity == 0)
434 a = (a & 0xf0) | vc->vc_ulcolor;
435 if (_reverse)
436 a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77);
437 if (_blink)
438 a ^= 0x80;
439 if (_intensity == 2)
440 a ^= 0x08;
441 if (vc->vc_hi_font_mask == 0x100)
442 a <<= 1;
443 return a;
444 }
445#else
446 return 0;
447#endif
448}
449
450static void update_attr(struct vc_data *vc)
451{
fa6ce9ab
JE		 452 vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity,
453 vc->vc_blink, vc->vc_underline,
454 vc->vc_reverse ^ vc->vc_decscnm, vc->vc_italic);
455 vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm, 0) << 8) | ' ';
1da177e4
LT		 456}
457
458/* Note: inverting the screen twice should revert to the original state */
459void invert_screen(struct vc_data *vc, int offset, int count, int viewed)
460{
461 unsigned short *p;
462
463 WARN_CONSOLE_UNLOCKED();
464
465 count /= 2;
466 p = screenpos(vc, offset, viewed);
467 if (vc->vc_sw->con_invert_region)
468 vc->vc_sw->con_invert_region(vc, p, count);
469#ifndef VT_BUF_VRAM_ONLY
470 else {
471 u16 *q = p;
472 int cnt = count;
473 u16 a;
474
475 if (!vc->vc_can_do_color) {
476 while (cnt--) {
477 a = scr_readw(q);
478 a ^= 0x0800;
479 scr_writew(a, q);
480 q++;
481 }
482 } else if (vc->vc_hi_font_mask == 0x100) {
483 while (cnt--) {
484 a = scr_readw(q);
485 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4);
486 scr_writew(a, q);
487 q++;
488 }
489 } else {
490 while (cnt--) {
491 a = scr_readw(q);
492 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4);
493 scr_writew(a, q);
494 q++;
495 }
496 }
497 }
498#endif
499 if (DO_UPDATE(vc))
500 do_update_region(vc, (unsigned long) p, count);
501}
502
503/* used by selection: complement pointer position */
504void complement_pos(struct vc_data *vc, int offset)
505{
414edcd3 506 static int old_offset = -1;
1da177e4
LT		 507 static unsigned short old;
508 static unsigned short oldx, oldy;
509
510 WARN_CONSOLE_UNLOCKED();
511
414edcd3
AD		 512 if (old_offset != -1 && old_offset >= 0 &&
513 old_offset < vc->vc_screenbuf_size) {
514 scr_writew(old, screenpos(vc, old_offset, 1));
1da177e4
LT		 515 if (DO_UPDATE(vc))
516 vc->vc_sw->con_putc(vc, old, oldy, oldx);
517 }
414edcd3
AD		 518
519 old_offset = offset;
520
521 if (offset != -1 && offset >= 0 &&
522 offset < vc->vc_screenbuf_size) {
1da177e4 523 unsigned short new;
414edcd3 524 unsigned short *p;
1da177e4
LT		 525 p = screenpos(vc, offset, 1);
526 old = scr_readw(p);
527 new = old ^ vc->vc_complement_mask;
528 scr_writew(new, p);
529 if (DO_UPDATE(vc)) {
530 oldx = (offset >> 1) % vc->vc_cols;
531 oldy = (offset >> 1) / vc->vc_cols;
532 vc->vc_sw->con_putc(vc, new, oldy, oldx);
533 }
534 }
414edcd3 535
1da177e4
LT		 536}
537
538static void insert_char(struct vc_data *vc, unsigned int nr)
539{
81732c3b 540 unsigned short *p = (unsigned short *) vc->vc_pos;
1da177e4 541
a883b70d 542 scr_memmovew(p + nr, p, (vc->vc_cols - vc->vc_x - nr) * 2);
81732c3b 543 scr_memsetw(p, vc->vc_video_erase_char, nr * 2);
1da177e4 544 vc->vc_need_wrap = 0;
81732c3b
JFM		 545 if (DO_UPDATE(vc))
546 do_update_region(vc, (unsigned long) p,
b1a925f4 547 vc->vc_cols - vc->vc_x);
1da177e4
LT		 548}
549
550static void delete_char(struct vc_data *vc, unsigned int nr)
551{
81732c3b 552 unsigned short *p = (unsigned short *) vc->vc_pos;
1da177e4 553
b1a925f4 554 scr_memcpyw(p, p + nr, (vc->vc_cols - vc->vc_x - nr) * 2);
81732c3b
JFM		 555 scr_memsetw(p + vc->vc_cols - vc->vc_x - nr, vc->vc_video_erase_char,
556 nr * 2);
1da177e4 557 vc->vc_need_wrap = 0;
81732c3b
JFM		 558 if (DO_UPDATE(vc))
559 do_update_region(vc, (unsigned long) p,
b1a925f4 560 vc->vc_cols - vc->vc_x);
1da177e4
LT		 561}
562
563static int softcursor_original;
564
565static void add_softcursor(struct vc_data *vc)
566{
567 int i = scr_readw((u16 *) vc->vc_pos);
568 u32 type = vc->vc_cursor_type;
569
570 if (! (type & 0x10)) return;
571 if (softcursor_original != -1) return;
572 softcursor_original = i;
573 i |= ((type >> 8) & 0xff00 );
574 i ^= ((type) & 0xff00 );
575 if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000;
576 if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700;
577 scr_writew(i, (u16 *) vc->vc_pos);
578 if (DO_UPDATE(vc))
579 vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x);
580}
581
582static void hide_softcursor(struct vc_data *vc)
583{
584 if (softcursor_original != -1) {
585 scr_writew(softcursor_original, (u16 *)vc->vc_pos);
586 if (DO_UPDATE(vc))
587 vc->vc_sw->con_putc(vc, softcursor_original,
588 vc->vc_y, vc->vc_x);
589 softcursor_original = -1;
590 }
591}
592
593static void hide_cursor(struct vc_data *vc)
594{
595 if (vc == sel_cons)
596 clear_selection();
597 vc->vc_sw->con_cursor(vc, CM_ERASE);
598 hide_softcursor(vc);
599}
600
601static void set_cursor(struct vc_data *vc)
602{
603 if (!IS_FG(vc) || console_blanked ||
604 vc->vc_mode == KD_GRAPHICS)
605 return;
606 if (vc->vc_deccm) {
607 if (vc == sel_cons)
608 clear_selection();
609 add_softcursor(vc);
610 if ((vc->vc_cursor_type & 0x0f) != 1)
611 vc->vc_sw->con_cursor(vc, CM_DRAW);
612 } else
613 hide_cursor(vc);
614}
615
616static void set_origin(struct vc_data *vc)
617{
618 WARN_CONSOLE_UNLOCKED();
619
620 if (!CON_IS_VISIBLE(vc) ||
621 !vc->vc_sw->con_set_origin ||
622 !vc->vc_sw->con_set_origin(vc))
623 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
624 vc->vc_visible_origin = vc->vc_origin;
625 vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size;
626 vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x;
627}
628
629static inline void save_screen(struct vc_data *vc)
630{
631 WARN_CONSOLE_UNLOCKED();
632
633 if (vc->vc_sw->con_save_screen)
634 vc->vc_sw->con_save_screen(vc);
635}
636
637/*
638 * Redrawing of screen
639 */
640
2a248307 641void clear_buffer_attributes(struct vc_data *vc)
1da177e4
LT		 642{
643 unsigned short *p = (unsigned short *)vc->vc_origin;
644 int count = vc->vc_screenbuf_size / 2;
645 int mask = vc->vc_hi_font_mask | 0xff;
646
647 for (; count > 0; count--, p++) {
648 scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p);
649 }
650}
651
652void redraw_screen(struct vc_data *vc, int is_switch)
653{
654 int redraw = 0;
655
656 WARN_CONSOLE_UNLOCKED();
657
658 if (!vc) {
659 /* strange ... */
660 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
661 return;
662 }
663
664 if (is_switch) {
665 struct vc_data *old_vc = vc_cons[fg_console].d;
666 if (old_vc == vc)
667 return;
668 if (!CON_IS_VISIBLE(vc))
669 redraw = 1;
670 *vc->vc_display_fg = vc;
671 fg_console = vc->vc_num;
672 hide_cursor(old_vc);
673 if (!CON_IS_VISIBLE(old_vc)) {
674 save_screen(old_vc);
675 set_origin(old_vc);
676 }
fbc92a34
KS		 677 if (tty0dev)
678 sysfs_notify(&tty0dev->kobj, NULL, "active");
1da177e4
LT		 679 } else {
680 hide_cursor(vc);
681 redraw = 1;
682 }
683
684 if (redraw) {
685 int update;
686 int old_was_color = vc->vc_can_do_color;
687
688 set_origin(vc);
689 update = vc->vc_sw->con_switch(vc);
690 set_palette(vc);
691 /*
692 * If console changed from mono<->color, the best we can do
693 * is to clear the buffer attributes. As it currently stands,
694 * rebuilding new attributes from the old buffer is not doable
695 * without overly complex code.
696 */
697 if (old_was_color != vc->vc_can_do_color) {
698 update_attr(vc);
699 clear_buffer_attributes(vc);
700 }
8fd4bd22
JB		 701
702 /* Forcibly update if we're panicing */
703 if ((update && vc->vc_mode != KD_GRAPHICS) ||
704 vt_force_oops_output(vc))
1da177e4
LT		 705 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
706 }
707 set_cursor(vc);
708 if (is_switch) {
709 set_leds();
710 compute_shiftstate();
8182ec49 711 notify_update(vc);
1da177e4
LT		 712 }
713}
714
715/*
716 * Allocation, freeing and resizing of VTs.
717 */
718
719int vc_cons_allocated(unsigned int i)
720{
721 return (i < MAX_NR_CONSOLES && vc_cons[i].d);
722}
723
724static void visual_init(struct vc_data *vc, int num, int init)
725{
726 /* ++Geert: vc->vc_sw->con_init determines console size */
727 if (vc->vc_sw)
728 module_put(vc->vc_sw->owner);
729 vc->vc_sw = conswitchp;
730#ifndef VT_SINGLE_DRIVER
731 if (con_driver_map[num])
732 vc->vc_sw = con_driver_map[num];
733#endif
734 __module_get(vc->vc_sw->owner);
735 vc->vc_num = num;
736 vc->vc_display_fg = &master_display_fg;
737 vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir;
738 vc->vc_uni_pagedir = 0;
739 vc->vc_hi_font_mask = 0;
740 vc->vc_complement_mask = 0;
741 vc->vc_can_do_color = 0;
8fd4bd22 742 vc->vc_panic_force_write = false;
1da177e4
LT		 743 vc->vc_sw->con_init(vc, init);
744 if (!vc->vc_complement_mask)
745 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
746 vc->vc_s_complement_mask = vc->vc_complement_mask;
747 vc->vc_size_row = vc->vc_cols << 1;
748 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
749}
750
751int vc_allocate(unsigned int currcons) /* return 0 on success */
752{
753 WARN_CONSOLE_UNLOCKED();
754
755 if (currcons >= MAX_NR_CONSOLES)
756 return -ENXIO;
757 if (!vc_cons[currcons].d) {
758 struct vc_data *vc;
b293d758 759 struct vt_notifier_param param;
1da177e4
LT		 760
761 /* prevent users from taking too much memory */
762 if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE))
763 return -EPERM;
764
765 /* due to the granularity of kmalloc, we waste some memory here */
766 /* the alloc is done in two steps, to optimize the common situation
767 of a 25x80 console (structsize=216, screenbuf_size=4000) */
768 /* although the numbers above are not valid since long ago, the
769 point is still up-to-date and the comment still has its value
770 even if only as a historical artifact. --mj, July 1998 */
b293d758 771 param.vc = vc = kzalloc(sizeof(struct vc_data), GFP_KERNEL);
1da177e4
LT		 772 if (!vc)
773 return -ENOMEM;
1da177e4 774 vc_cons[currcons].d = vc;
ff917ba4 775 tty_port_init(&vc->port);
c2c88f10 776 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
1da177e4
LT		 777 visual_init(vc, currcons, 1);
778 if (!*vc->vc_uni_pagedir_loc)
779 con_set_default_unimap(vc);
5c9228f0 780 vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL);
1da177e4
LT		 781 if (!vc->vc_screenbuf) {
782 kfree(vc);
783 vc_cons[currcons].d = NULL;
784 return -ENOMEM;
785 }
f6c06b68
MG		 786
787 /* If no drivers have overridden us and the user didn't pass a
788 boot option, default to displaying the cursor */
789 if (global_cursor_default == -1)
790 global_cursor_default = 1;
791
1da177e4 792 vc_init(vc, vc->vc_rows, vc->vc_cols, 1);
4995f8ef 793 vcs_make_sysfs(currcons);
b293d758 794 atomic_notifier_call_chain(&vt_notifier_list, VT_ALLOCATE, &param);
1da177e4
LT		 795 }
796 return 0;
797}
798
e400b6ec
AD		 799static inline int resize_screen(struct vc_data *vc, int width, int height,
800 int user)
1da177e4
LT		 801{
802 /* Resizes the resolution of the display adapater */
803 int err = 0;
804
805 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize)
e400b6ec
AD		 806 err = vc->vc_sw->con_resize(vc, width, height, user);
807
1da177e4
LT		 808 return err;
809}
810
811/*
812 * Change # of rows and columns (0 means unchanged/the size of fg_console)
813 * [this is to be used together with some user program
814 * like resize that changes the hardware videomode]
815 */
816#define VC_RESIZE_MAXCOL (32767)
817#define VC_RESIZE_MAXROW (32767)
8c9a9dd0
AC		 818
819/**
820 * vc_do_resize - resizing method for the tty
821 * @tty: tty being resized
822 * @real_tty: real tty (different to tty if a pty/tty pair)
823 * @vc: virtual console private data
824 * @cols: columns
825 * @lines: lines
826 *
827 * Resize a virtual console, clipping according to the actual constraints.
828 * If the caller passes a tty structure then update the termios winsize
3ad2f3fb 829 * information and perform any necessary signal handling.
8c9a9dd0 830 *
6a1c0680 831 * Caller must hold the console semaphore. Takes the termios rwsem and
8c9a9dd0
AC		 832 * ctrl_lock of the tty IFF a tty is passed.
833 */
834
fc6f6238
AC		 835static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc,
836 unsigned int cols, unsigned int lines)
1da177e4
LT		 837{
838 unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0;
9e0ba741 839 unsigned long end;
f2ee4ae8 840 unsigned int old_rows, old_row_size;
1da177e4 841 unsigned int new_cols, new_rows, new_row_size, new_screen_size;
9e0ba741 842 unsigned int user;
1da177e4
LT		 843 unsigned short *newscreen;
844
845 WARN_CONSOLE_UNLOCKED();
846
847 if (!vc)
848 return -ENXIO;
849
e400b6ec
AD		 850 user = vc->vc_resize_user;
851 vc->vc_resize_user = 0;
852
1da177e4
LT		 853 if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW)
854 return -EINVAL;
855
856 new_cols = (cols ? cols : vc->vc_cols);
857 new_rows = (lines ? lines : vc->vc_rows);
858 new_row_size = new_cols << 1;
859 new_screen_size = new_row_size * new_rows;
860
861 if (new_cols == vc->vc_cols && new_rows == vc->vc_rows)
862 return 0;
863
5cbded58 864 newscreen = kmalloc(new_screen_size, GFP_USER);
1da177e4
LT		 865 if (!newscreen)
866 return -ENOMEM;
867
868 old_rows = vc->vc_rows;
1da177e4 869 old_row_size = vc->vc_size_row;
1da177e4 870
e400b6ec 871 err = resize_screen(vc, new_cols, new_rows, user);
1da177e4
LT		 872 if (err) {
873 kfree(newscreen);
874 return err;
875 }
876
877 vc->vc_rows = new_rows;
878 vc->vc_cols = new_cols;
879 vc->vc_size_row = new_row_size;
880 vc->vc_screenbuf_size = new_screen_size;
881
882 rlth = min(old_row_size, new_row_size);
883 rrem = new_row_size - rlth;
884 old_origin = vc->vc_origin;
885 new_origin = (long) newscreen;
886 new_scr_end = new_origin + new_screen_size;
3b41dc1a
AD		 887
888 if (vc->vc_y > new_rows) {
889 if (old_rows - vc->vc_y < new_rows) {
890 /*
891 * Cursor near the bottom, copy contents from the
892 * bottom of buffer
893 */
894 old_origin += (old_rows - new_rows) * old_row_size;
3b41dc1a
AD		 895 } else {
896 /*
897 * Cursor is in no man's land, copy 1/2 screenful
898 * from the top and bottom of cursor position
899 */
900 old_origin += (vc->vc_y - new_rows/2) * old_row_size;
3b41dc1a 901 }
9fc2b2d0
FJ		 902 }
903
904 end = old_origin + old_row_size * min(old_rows, new_rows);
1da177e4
LT		 905
906 update_attr(vc);
907
3b41dc1a
AD		 908 while (old_origin < end) {
909 scr_memcpyw((unsigned short *) new_origin,
910 (unsigned short *) old_origin, rlth);
1da177e4 911 if (rrem)
3b41dc1a
AD		 912 scr_memsetw((void *)(new_origin + rlth),
913 vc->vc_video_erase_char, rrem);
1da177e4
LT		 914 old_origin += old_row_size;
915 new_origin += new_row_size;
916 }
917 if (new_scr_end > new_origin)
3b41dc1a
AD		 918 scr_memsetw((void *)new_origin, vc->vc_video_erase_char,
919 new_scr_end - new_origin);
5c9228f0 920 kfree(vc->vc_screenbuf);
1da177e4 921 vc->vc_screenbuf = newscreen;
1da177e4
LT		 922 vc->vc_screenbuf_size = new_screen_size;
923 set_origin(vc);
924
925 /* do part of a reset_terminal() */
926 vc->vc_top = 0;
927 vc->vc_bottom = vc->vc_rows;
928 gotoxy(vc, vc->vc_x, vc->vc_y);
929 save_cur(vc);
930
8c9a9dd0
AC		 931 if (tty) {
932 /* Rewrite the requested winsize data with the actual
933 resulting sizes */
934 struct winsize ws;
1da177e4
LT		 935 memset(&ws, 0, sizeof(ws));
936 ws.ws_row = vc->vc_rows;
937 ws.ws_col = vc->vc_cols;
938 ws.ws_ypixel = vc->vc_scan_lines;
fc6f6238 939 tty_do_resize(tty, &ws);
1da177e4
LT		 940 }
941
942 if (CON_IS_VISIBLE(vc))
943 update_screen(vc);
8b92e87d 944 vt_event_post(VT_EVENT_RESIZE, vc->vc_num, vc->vc_num);
1da177e4
LT		 945 return err;
946}
947
8c9a9dd0
AC		 948/**
949 * vc_resize - resize a VT
950 * @vc: virtual console
951 * @cols: columns
952 * @rows: rows
953 *
954 * Resize a virtual console as seen from the console end of things. We
955 * use the common vc_do_resize methods to update the structures. The
956 * caller must hold the console sem to protect console internals and
8ce73264 957 * vc->port.tty
8c9a9dd0
AC		 958 */
959
960int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int rows)
961{
8ce73264 962 return vc_do_resize(vc->port.tty, vc, cols, rows);
8c9a9dd0
AC		 963}
964
965/**
966 * vt_resize - resize a VT
967 * @tty: tty to resize
8c9a9dd0
AC		 968 * @ws: winsize attributes
969 *
970 * Resize a virtual terminal. This is called by the tty layer as we
971 * register our own handler for resizing. The mutual helper does all
972 * the actual work.
973 *
974 * Takes the console sem and the called methods then take the tty
6a1c0680 975 * termios_rwsem and the tty ctrl_lock in that order.
8c9a9dd0 976 */
da2bdf9a 977static int vt_resize(struct tty_struct *tty, struct winsize *ws)
ca9bda00 978{
8c9a9dd0
AC		 979 struct vc_data *vc = tty->driver_data;
980 int ret;
ca9bda00 981
ac751efa 982 console_lock();
fc6f6238 983 ret = vc_do_resize(tty, vc, ws->ws_col, ws->ws_row);
ac751efa 984 console_unlock();
8c9a9dd0 985 return ret;
ca9bda00 986}
1da177e4 987
421b40a6 988struct vc_data *vc_deallocate(unsigned int currcons)
1da177e4 989{
421b40a6
PH		 990 struct vc_data *vc = NULL;
991
1da177e4
LT		 992 WARN_CONSOLE_UNLOCKED();
993
994 if (vc_cons_allocated(currcons)) {
421b40a6 995 struct vt_notifier_param param;
4995f8ef 996
421b40a6 997 param.vc = vc = vc_cons[currcons].d;
b293d758 998 atomic_notifier_call_chain(&vt_notifier_list, VT_DEALLOCATE, &param);
4995f8ef 999 vcs_remove_sysfs(currcons);
1da177e4 1000 vc->vc_sw->con_deinit(vc);
bde0d2c9 1001 put_pid(vc->vt_pid);
d459ec0b 1002 module_put(vc->vc_sw->owner);
5c9228f0 1003 kfree(vc->vc_screenbuf);
1da177e4
LT		 1004 vc_cons[currcons].d = NULL;
1005 }
421b40a6 1006 return vc;
1da177e4
LT		 1007}
1008
1009/*
1010 * VT102 emulator
1011 */
1012
079c9534
AC		 1013#define set_kbd(vc, x) vt_set_kbd_mode_bit((vc)->vc_num, (x))
1014#define clr_kbd(vc, x) vt_clr_kbd_mode_bit((vc)->vc_num, (x))
1015#define is_kbd(vc, x) vt_get_kbd_mode_bit((vc)->vc_num, (x))
1da177e4
LT		 1016
1017#define decarm VC_REPEAT
1018#define decckm VC_CKMODE
1019#define kbdapplic VC_APPLIC
1020#define lnm VC_CRLF
1021
1022/*
1023 * this is what the terminal answers to a ESC-Z or csi0c query.
1024 */
1025#define VT100ID "\033[?1;2c"
1026#define VT102ID "\033[?6c"
1027
1028unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7,
1029 8,12,10,14, 9,13,11,15 };
1030
1031/* the default colour table, for VGA+ colour systems */
1032int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
1033 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
1034int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
1035 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
1036int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
1037 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
1038
1c2bbe6a
JE		 1039module_param_array(default_red, int, NULL, S_IRUGO | S_IWUSR);
1040module_param_array(default_grn, int, NULL, S_IRUGO | S_IWUSR);
1041module_param_array(default_blu, int, NULL, S_IRUGO | S_IWUSR);
1042
1da177e4
LT		 1043/*
1044 * gotoxy() must verify all boundaries, because the arguments
1045 * might also be negative. If the given position is out of
1046 * bounds, the cursor is placed at the nearest margin.
1047 */
1048static void gotoxy(struct vc_data *vc, int new_x, int new_y)
1049{
1050 int min_y, max_y;
1051
1052 if (new_x < 0)
1053 vc->vc_x = 0;
1054 else {
1055 if (new_x >= vc->vc_cols)
1056 vc->vc_x = vc->vc_cols - 1;
1057 else
1058 vc->vc_x = new_x;
1059 }
1060
1061 if (vc->vc_decom) {
1062 min_y = vc->vc_top;
1063 max_y = vc->vc_bottom;
1064 } else {
1065 min_y = 0;
1066 max_y = vc->vc_rows;
1067 }
1068 if (new_y < min_y)
1069 vc->vc_y = min_y;
1070 else if (new_y >= max_y)
1071 vc->vc_y = max_y - 1;
1072 else
1073 vc->vc_y = new_y;
1074 vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1);
1075 vc->vc_need_wrap = 0;
1076}
1077
1078/* for absolute user moves, when decom is set */
1079static void gotoxay(struct vc_data *vc, int new_x, int new_y)
1080{
1081 gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y);
1082}
1083
1084void scrollback(struct vc_data *vc, int lines)
1085{
1086 if (!lines)
1087 lines = vc->vc_rows / 2;
1088 scrolldelta(-lines);
1089}
1090
1091void scrollfront(struct vc_data *vc, int lines)
1092{
1093 if (!lines)
1094 lines = vc->vc_rows / 2;
1095 scrolldelta(lines);
1096}
1097
1098static void lf(struct vc_data *vc)
1099{
1100 /* don't scroll if above bottom of scrolling region, or
1101 * if below scrolling region
1102 */
1103 if (vc->vc_y + 1 == vc->vc_bottom)
1104 scrup(vc, vc->vc_top, vc->vc_bottom, 1);
1105 else if (vc->vc_y < vc->vc_rows - 1) {
1106 vc->vc_y++;
1107 vc->vc_pos += vc->vc_size_row;
1108 }
1109 vc->vc_need_wrap = 0;
b293d758 1110 notify_write(vc, '\n');
1da177e4
LT		 1111}
1112
1113static void ri(struct vc_data *vc)
1114{
1115 /* don't scroll if below top of scrolling region, or
1116 * if above scrolling region
1117 */
1118 if (vc->vc_y == vc->vc_top)
1119 scrdown(vc, vc->vc_top, vc->vc_bottom, 1);
1120 else if (vc->vc_y > 0) {
1121 vc->vc_y--;
1122 vc->vc_pos -= vc->vc_size_row;
1123 }
1124 vc->vc_need_wrap = 0;
1125}
1126
1127static inline void cr(struct vc_data *vc)
1128{
1129 vc->vc_pos -= vc->vc_x << 1;
1130 vc->vc_need_wrap = vc->vc_x = 0;
b293d758 1131 notify_write(vc, '\r');
1da177e4
LT		 1132}
1133
1134static inline void bs(struct vc_data *vc)
1135{
1136 if (vc->vc_x) {
1137 vc->vc_pos -= 2;
1138 vc->vc_x--;
1139 vc->vc_need_wrap = 0;
b293d758 1140 notify_write(vc, '\b');
1da177e4
LT		 1141 }
1142}
1143
1144static inline void del(struct vc_data *vc)
1145{
1146 /* ignored */
1147}
1148
1149static void csi_J(struct vc_data *vc, int vpar)
1150{
1151 unsigned int count;
1152 unsigned short * start;
1153
1154 switch (vpar) {
1155 case 0: /* erase from cursor to end of display */
1156 count = (vc->vc_scr_end - vc->vc_pos) >> 1;
1157 start = (unsigned short *)vc->vc_pos;
1da177e4
LT		 1158 break;
1159 case 1: /* erase from start to cursor */
1160 count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1;
1161 start = (unsigned short *)vc->vc_origin;
1da177e4 1162 break;
f8df13e0
PP		 1163 case 3: /* erase scroll-back buffer (and whole display) */
1164 scr_memsetw(vc->vc_screenbuf, vc->vc_video_erase_char,
1165 vc->vc_screenbuf_size >> 1);
1166 set_origin(vc);
f8df13e0 1167 /* fall through */
1da177e4
LT		 1168 case 2: /* erase whole display */
1169 count = vc->vc_cols * vc->vc_rows;
1170 start = (unsigned short *)vc->vc_origin;
1da177e4
LT		 1171 break;
1172 default:
1173 return;
1174 }
1175 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
81732c3b
JFM		 1176 if (DO_UPDATE(vc))
1177 do_update_region(vc, (unsigned long) start, count);
1da177e4
LT		 1178 vc->vc_need_wrap = 0;
1179}
1180
1181static void csi_K(struct vc_data *vc, int vpar)
1182{
1183 unsigned int count;
1184 unsigned short * start;
1185
1186 switch (vpar) {
1187 case 0: /* erase from cursor to end of line */
1188 count = vc->vc_cols - vc->vc_x;
1189 start = (unsigned short *)vc->vc_pos;
1da177e4
LT		 1190 break;
1191 case 1: /* erase from start of line to cursor */
1192 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1193 count = vc->vc_x + 1;
1da177e4
LT		 1194 break;
1195 case 2: /* erase whole line */
1196 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1197 count = vc->vc_cols;
1da177e4
LT		 1198 break;
1199 default:
1200 return;
1201 }
1202 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1203 vc->vc_need_wrap = 0;
81732c3b
JFM		 1204 if (DO_UPDATE(vc))
1205 do_update_region(vc, (unsigned long) start, count);
1da177e4
LT		 1206}
1207
1208static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */
1209{ /* not vt100? */
1210 int count;
1211
1212 if (!vpar)
1213 vpar++;
1214 count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar;
1215
1216 scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count);
1217 if (DO_UPDATE(vc))
1218 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count);
1219 vc->vc_need_wrap = 0;
1220}
1221
1222static void default_attr(struct vc_data *vc)
1223{
1224 vc->vc_intensity = 1;
fa6ce9ab 1225 vc->vc_italic = 0;
1da177e4
LT		 1226 vc->vc_underline = 0;
1227 vc->vc_reverse = 0;
1228 vc->vc_blink = 0;
1229 vc->vc_color = vc->vc_def_color;
1230}
1231
ac751efa 1232/* console_lock is held */
1da177e4
LT		 1233static void csi_m(struct vc_data *vc)
1234{
1235 int i;
1236
1237 for (i = 0; i <= vc->vc_npar; i++)
1238 switch (vc->vc_par[i]) {
1239 case 0: /* all attributes off */
1240 default_attr(vc);
1241 break;
1242 case 1:
1243 vc->vc_intensity = 2;
1244 break;
1245 case 2:
1246 vc->vc_intensity = 0;
1247 break;
fa6ce9ab
JE		 1248 case 3:
1249 vc->vc_italic = 1;
1250 break;
1da177e4
LT		 1251 case 4:
1252 vc->vc_underline = 1;
1253 break;
1254 case 5:
1255 vc->vc_blink = 1;
1256 break;
1257 case 7:
1258 vc->vc_reverse = 1;
1259 break;
1260 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1261 * Select primary font, don't display
1262 * control chars if defined, don't set
1263 * bit 8 on output.
1264 */
1265 vc->vc_translate = set_translate(vc->vc_charset == 0
1266 ? vc->vc_G0_charset
1267 : vc->vc_G1_charset, vc);
1268 vc->vc_disp_ctrl = 0;
1269 vc->vc_toggle_meta = 0;
1270 break;
1271 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1272 * Select first alternate font, lets
1273 * chars < 32 be displayed as ROM chars.
1274 */
1275 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1276 vc->vc_disp_ctrl = 1;
1277 vc->vc_toggle_meta = 0;
1278 break;
1279 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1280 * Select second alternate font, toggle
1281 * high bit before displaying as ROM char.
1282 */
1283 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1284 vc->vc_disp_ctrl = 1;
1285 vc->vc_toggle_meta = 1;
1286 break;
1287 case 21:
1288 case 22:
1289 vc->vc_intensity = 1;
1290 break;
fa6ce9ab
JE		 1291 case 23:
1292 vc->vc_italic = 0;
1293 break;
1da177e4
LT		 1294 case 24:
1295 vc->vc_underline = 0;
1296 break;
1297 case 25:
1298 vc->vc_blink = 0;
1299 break;
1300 case 27:
1301 vc->vc_reverse = 0;
1302 break;
1303 case 38: /* ANSI X3.64-1979 (SCO-ish?)
1304 * Enables underscore, white foreground
1305 * with white underscore (Linux - use
1306 * default foreground).
1307 */
1308 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1309 vc->vc_underline = 1;
1310 break;
1311 case 39: /* ANSI X3.64-1979 (SCO-ish?)
1312 * Disable underline option.
1313 * Reset colour to default? It did this
1314 * before...
1315 */
1316 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1317 vc->vc_underline = 0;
1318 break;
1319 case 49:
1320 vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f);
1321 break;
1322 default:
1323 if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37)
1324 vc->vc_color = color_table[vc->vc_par[i] - 30]
1325 | (vc->vc_color & 0xf0);
1326 else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47)
1327 vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4)
1328 | (vc->vc_color & 0x0f);
1329 break;
1330 }
1331 update_attr(vc);
1332}
1333
6732c8bb 1334static void respond_string(const char *p, struct tty_port *port)
1da177e4
LT		 1335{
1336 while (*p) {
6732c8bb 1337 tty_insert_flip_char(port, *p, 0);
1da177e4
LT		 1338 p++;
1339 }
6732c8bb 1340 tty_schedule_flip(port);
1da177e4
LT		 1341}
1342
1343static void cursor_report(struct vc_data *vc, struct tty_struct *tty)
1344{
1345 char buf[40];
1346
1347 sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1);
6732c8bb 1348 respond_string(buf, tty->port);
1da177e4
LT		 1349}
1350
1351static inline void status_report(struct tty_struct *tty)
1352{
6732c8bb 1353 respond_string("\033[0n", tty->port); /* Terminal ok */
1da177e4
LT		 1354}
1355
6732c8bb 1356static inline void respond_ID(struct tty_struct *tty)
1da177e4 1357{
6732c8bb 1358 respond_string(VT102ID, tty->port);
1da177e4
LT		 1359}
1360
1361void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry)
1362{
1363 char buf[8];
1364
1365 sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx),
1366 (char)('!' + mry));
6732c8bb 1367 respond_string(buf, tty->port);
1da177e4
LT		 1368}
1369
1370/* invoked via ioctl(TIOCLINUX) and through set_selection */
1371int mouse_reporting(void)
1372{
1373 return vc_cons[fg_console].d->vc_report_mouse;
1374}
1375
ac751efa 1376/* console_lock is held */
1da177e4
LT		 1377static void set_mode(struct vc_data *vc, int on_off)
1378{
1379 int i;
1380
1381 for (i = 0; i <= vc->vc_npar; i++)
1382 if (vc->vc_ques) {
1383 switch(vc->vc_par[i]) { /* DEC private modes set/reset */
1384 case 1: /* Cursor keys send ^[Ox/^[[x */
1385 if (on_off)
1386 set_kbd(vc, decckm);
1387 else
1388 clr_kbd(vc, decckm);
1389 break;
1390 case 3: /* 80/132 mode switch unimplemented */
1391 vc->vc_deccolm = on_off;
1392#if 0
1393 vc_resize(deccolm ? 132 : 80, vc->vc_rows);
1394 /* this alone does not suffice; some user mode
1395 utility has to change the hardware regs */
1396#endif
1397 break;
1398 case 5: /* Inverted screen on/off */
1399 if (vc->vc_decscnm != on_off) {
1400 vc->vc_decscnm = on_off;
1401 invert_screen(vc, 0, vc->vc_screenbuf_size, 0);
1402 update_attr(vc);
1403 }
1404 break;
1405 case 6: /* Origin relative/absolute */
1406 vc->vc_decom = on_off;
1407 gotoxay(vc, 0, 0);
1408 break;
1409 case 7: /* Autowrap on/off */
1410 vc->vc_decawm = on_off;
1411 break;
1412 case 8: /* Autorepeat on/off */
1413 if (on_off)
1414 set_kbd(vc, decarm);
1415 else
1416 clr_kbd(vc, decarm);
1417 break;
1418 case 9:
1419 vc->vc_report_mouse = on_off ? 1 : 0;
1420 break;
1421 case 25: /* Cursor on/off */
1422 vc->vc_deccm = on_off;
1423 break;
1424 case 1000:
1425 vc->vc_report_mouse = on_off ? 2 : 0;
1426 break;
1427 }
1428 } else {
1429 switch(vc->vc_par[i]) { /* ANSI modes set/reset */
1430 case 3: /* Monitor (display ctrls) */
1431 vc->vc_disp_ctrl = on_off;
1432 break;
1433 case 4: /* Insert Mode on/off */
1434 vc->vc_decim = on_off;
1435 break;
1436 case 20: /* Lf, Enter == CrLf/Lf */
1437 if (on_off)
1438 set_kbd(vc, lnm);
1439 else
1440 clr_kbd(vc, lnm);
1441 break;
1442 }
1443 }
1444}
1445
ac751efa 1446/* console_lock is held */
1da177e4
LT		 1447static void setterm_command(struct vc_data *vc)
1448{
1449 switch(vc->vc_par[0]) {
1450 case 1: /* set color for underline mode */
1451 if (vc->vc_can_do_color &&
1452 vc->vc_par[1] < 16) {
1453 vc->vc_ulcolor = color_table[vc->vc_par[1]];
1454 if (vc->vc_underline)
1455 update_attr(vc);
1456 }
1457 break;
1458 case 2: /* set color for half intensity mode */
1459 if (vc->vc_can_do_color &&
1460 vc->vc_par[1] < 16) {
1461 vc->vc_halfcolor = color_table[vc->vc_par[1]];
1462 if (vc->vc_intensity == 0)
1463 update_attr(vc);
1464 }
1465 break;
1466 case 8: /* store colors as defaults */
1467 vc->vc_def_color = vc->vc_attr;
1468 if (vc->vc_hi_font_mask == 0x100)
1469 vc->vc_def_color >>= 1;
1470 default_attr(vc);
1471 update_attr(vc);
1472 break;
1473 case 9: /* set blanking interval */
f324edc8 1474 blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60;
1da177e4
LT		 1475 poke_blanked_console();
1476 break;
1477 case 10: /* set bell frequency in Hz */
1478 if (vc->vc_npar >= 1)
1479 vc->vc_bell_pitch = vc->vc_par[1];
1480 else
1481 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1482 break;
1483 case 11: /* set bell duration in msec */
1484 if (vc->vc_npar >= 1)
1485 vc->vc_bell_duration = (vc->vc_par[1] < 2000) ?
1486 vc->vc_par[1] * HZ / 1000 : 0;
1487 else
1488 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1489 break;
1490 case 12: /* bring specified console to the front */
1491 if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1))
1492 set_console(vc->vc_par[1] - 1);
1493 break;
1494 case 13: /* unblank the screen */
1495 poke_blanked_console();
1496 break;
1497 case 14: /* set vesa powerdown interval */
1498 vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1499 break;
1500 case 15: /* activate the previous console */
1501 set_console(last_console);
1502 break;
1503 }
1504}
1505
ac751efa 1506/* console_lock is held */
1da177e4
LT		 1507static void csi_at(struct vc_data *vc, unsigned int nr)
1508{
1509 if (nr > vc->vc_cols - vc->vc_x)
1510 nr = vc->vc_cols - vc->vc_x;
1511 else if (!nr)
1512 nr = 1;
1513 insert_char(vc, nr);
1514}
1515
ac751efa 1516/* console_lock is held */
1da177e4
LT		 1517static void csi_L(struct vc_data *vc, unsigned int nr)
1518{
1519 if (nr > vc->vc_rows - vc->vc_y)
1520 nr = vc->vc_rows - vc->vc_y;
1521 else if (!nr)
1522 nr = 1;
1523 scrdown(vc, vc->vc_y, vc->vc_bottom, nr);
1524 vc->vc_need_wrap = 0;
1525}
1526
ac751efa 1527/* console_lock is held */
1da177e4
LT		 1528static void csi_P(struct vc_data *vc, unsigned int nr)
1529{
1530 if (nr > vc->vc_cols - vc->vc_x)
1531 nr = vc->vc_cols - vc->vc_x;
1532 else if (!nr)
1533 nr = 1;
1534 delete_char(vc, nr);
1535}
1536
ac751efa 1537/* console_lock is held */
1da177e4
LT		 1538static void csi_M(struct vc_data *vc, unsigned int nr)
1539{
1540 if (nr > vc->vc_rows - vc->vc_y)
1541 nr = vc->vc_rows - vc->vc_y;
1542 else if (!nr)
1543 nr=1;
1544 scrup(vc, vc->vc_y, vc->vc_bottom, nr);
1545 vc->vc_need_wrap = 0;
1546}
1547
ac751efa 1548/* console_lock is held (except via vc_init->reset_terminal */
1da177e4
LT		 1549static void save_cur(struct vc_data *vc)
1550{
1551 vc->vc_saved_x = vc->vc_x;
1552 vc->vc_saved_y = vc->vc_y;
1553 vc->vc_s_intensity = vc->vc_intensity;
fa6ce9ab 1554 vc->vc_s_italic = vc->vc_italic;
1da177e4
LT		 1555 vc->vc_s_underline = vc->vc_underline;
1556 vc->vc_s_blink = vc->vc_blink;
1557 vc->vc_s_reverse = vc->vc_reverse;
1558 vc->vc_s_charset = vc->vc_charset;
1559 vc->vc_s_color = vc->vc_color;
1560 vc->vc_saved_G0 = vc->vc_G0_charset;
1561 vc->vc_saved_G1 = vc->vc_G1_charset;
1562}
1563
ac751efa 1564/* console_lock is held */
1da177e4
LT		 1565static void restore_cur(struct vc_data *vc)
1566{
1567 gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y);
1568 vc->vc_intensity = vc->vc_s_intensity;
fa6ce9ab 1569 vc->vc_italic = vc->vc_s_italic;
1da177e4
LT		 1570 vc->vc_underline = vc->vc_s_underline;
1571 vc->vc_blink = vc->vc_s_blink;
1572 vc->vc_reverse = vc->vc_s_reverse;
1573 vc->vc_charset = vc->vc_s_charset;
1574 vc->vc_color = vc->vc_s_color;
1575 vc->vc_G0_charset = vc->vc_saved_G0;
1576 vc->vc_G1_charset = vc->vc_saved_G1;
1577 vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc);
1578 update_attr(vc);
1579 vc->vc_need_wrap = 0;
1580}
1581
1582enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey,
1583 EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd,
1584 ESpalette };
1585
ac751efa 1586/* console_lock is held (except via vc_init()) */
1da177e4
LT		 1587static void reset_terminal(struct vc_data *vc, int do_clear)
1588{
1589 vc->vc_top = 0;
1590 vc->vc_bottom = vc->vc_rows;
1591 vc->vc_state = ESnormal;
1592 vc->vc_ques = 0;
1593 vc->vc_translate = set_translate(LAT1_MAP, vc);
1594 vc->vc_G0_charset = LAT1_MAP;
1595 vc->vc_G1_charset = GRAF_MAP;
1596 vc->vc_charset = 0;
1597 vc->vc_need_wrap = 0;
1598 vc->vc_report_mouse = 0;
042f10ec 1599 vc->vc_utf = default_utf8;
1da177e4
LT		 1600 vc->vc_utf_count = 0;
1601
1602 vc->vc_disp_ctrl = 0;
1603 vc->vc_toggle_meta = 0;
1604
1605 vc->vc_decscnm = 0;
1606 vc->vc_decom = 0;
1607 vc->vc_decawm = 1;
f6c06b68 1608 vc->vc_deccm = global_cursor_default;
1da177e4
LT		 1609 vc->vc_decim = 0;
1610
079c9534 1611 vt_reset_keyboard(vc->vc_num);
1da177e4 1612
9ea9a886 1613 vc->vc_cursor_type = cur_default;
1da177e4
LT		 1614 vc->vc_complement_mask = vc->vc_s_complement_mask;
1615
1616 default_attr(vc);
1617 update_attr(vc);
1618
1619 vc->vc_tab_stop[0] = 0x01010100;
1620 vc->vc_tab_stop[1] =
1621 vc->vc_tab_stop[2] =
1622 vc->vc_tab_stop[3] =
a564738c
WK		 1623 vc->vc_tab_stop[4] =
1624 vc->vc_tab_stop[5] =
1625 vc->vc_tab_stop[6] =
1626 vc->vc_tab_stop[7] = 0x01010101;
1da177e4
LT		 1627
1628 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1629 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1630
1631 gotoxy(vc, 0, 0);
1632 save_cur(vc);
1633 if (do_clear)
1634 csi_J(vc, 2);
1635}
1636
ac751efa 1637/* console_lock is held */
1da177e4
LT		 1638static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
1639{
1640 /*
1641 * Control characters can be used in the _middle_
1642 * of an escape sequence.
1643 */
1644 switch (c) {
1645 case 0:
1646 return;
1647 case 7:
1648 if (vc->vc_bell_duration)
1649 kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration);
1650 return;
1651 case 8:
1652 bs(vc);
1653 return;
1654 case 9:
1655 vc->vc_pos -= (vc->vc_x << 1);
1656 while (vc->vc_x < vc->vc_cols - 1) {
1657 vc->vc_x++;
1658 if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31)))
1659 break;
1660 }
1661 vc->vc_pos += (vc->vc_x << 1);
b293d758 1662 notify_write(vc, '\t');
1da177e4
LT		 1663 return;
1664 case 10: case 11: case 12:
1665 lf(vc);
1666 if (!is_kbd(vc, lnm))
1667 return;
1668 case 13:
1669 cr(vc);
1670 return;
1671 case 14:
1672 vc->vc_charset = 1;
1673 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1674 vc->vc_disp_ctrl = 1;
1675 return;
1676 case 15:
1677 vc->vc_charset = 0;
1678 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1679 vc->vc_disp_ctrl = 0;
1680 return;
1681 case 24: case 26:
1682 vc->vc_state = ESnormal;
1683 return;
1684 case 27:
1685 vc->vc_state = ESesc;
1686 return;
1687 case 127:
1688 del(vc);
1689 return;
1690 case 128+27:
1691 vc->vc_state = ESsquare;
1692 return;
1693 }
1694 switch(vc->vc_state) {
1695 case ESesc:
1696 vc->vc_state = ESnormal;
1697 switch (c) {
1698 case '[':
1699 vc->vc_state = ESsquare;
1700 return;
1701 case ']':
1702 vc->vc_state = ESnonstd;
1703 return;
1704 case '%':
1705 vc->vc_state = ESpercent;
1706 return;
1707 case 'E':
1708 cr(vc);
1709 lf(vc);
1710 return;
1711 case 'M':
1712 ri(vc);
1713 return;
1714 case 'D':
1715 lf(vc);
1716 return;
1717 case 'H':
1718 vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31));
1719 return;
1720 case 'Z':
1721 respond_ID(tty);
1722 return;
1723 case '7':
1724 save_cur(vc);
1725 return;
1726 case '8':
1727 restore_cur(vc);
1728 return;
1729 case '(':
1730 vc->vc_state = ESsetG0;
1731 return;
1732 case ')':
1733 vc->vc_state = ESsetG1;
1734 return;
1735 case '#':
1736 vc->vc_state = EShash;
1737 return;
1738 case 'c':
1739 reset_terminal(vc, 1);
1740 return;
1741 case '>': /* Numeric keypad */
1742 clr_kbd(vc, kbdapplic);
1743 return;
1744 case '=': /* Appl. keypad */
1745 set_kbd(vc, kbdapplic);
1746 return;
1747 }
1748 return;
1749 case ESnonstd:
1750 if (c=='P') { /* palette escape sequence */
1751 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1752 vc->vc_par[vc->vc_npar] = 0;
1753 vc->vc_npar = 0;
1754 vc->vc_state = ESpalette;
1755 return;
1756 } else if (c=='R') { /* reset palette */
1757 reset_palette(vc);
1758 vc->vc_state = ESnormal;
1759 } else
1760 vc->vc_state = ESnormal;
1761 return;
1762 case ESpalette:
74c807ce
AS		 1763 if (isxdigit(c)) {
1764 vc->vc_par[vc->vc_npar++] = hex_to_bin(c);
1da177e4
LT		 1765 if (vc->vc_npar == 7) {
1766 int i = vc->vc_par[0] * 3, j = 1;
1767 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1768 vc->vc_palette[i++] += vc->vc_par[j++];
1769 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1770 vc->vc_palette[i++] += vc->vc_par[j++];
1771 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1772 vc->vc_palette[i] += vc->vc_par[j];
1773 set_palette(vc);
1774 vc->vc_state = ESnormal;
1775 }
1776 } else
1777 vc->vc_state = ESnormal;
1778 return;
1779 case ESsquare:
1780 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1781 vc->vc_par[vc->vc_npar] = 0;
1782 vc->vc_npar = 0;
1783 vc->vc_state = ESgetpars;
1784 if (c == '[') { /* Function key */
1785 vc->vc_state=ESfunckey;
1786 return;
1787 }
1788 vc->vc_ques = (c == '?');
1789 if (vc->vc_ques)
1790 return;
1791 case ESgetpars:
1792 if (c == ';' && vc->vc_npar < NPAR - 1) {
1793 vc->vc_npar++;
1794 return;
1795 } else if (c>='0' && c<='9') {
1796 vc->vc_par[vc->vc_npar] *= 10;
1797 vc->vc_par[vc->vc_npar] += c - '0';
1798 return;
1799 } else
1800 vc->vc_state = ESgotpars;
1801 case ESgotpars:
1802 vc->vc_state = ESnormal;
1803 switch(c) {
1804 case 'h':
1805 set_mode(vc, 1);
1806 return;
1807 case 'l':
1808 set_mode(vc, 0);
1809 return;
1810 case 'c':
1811 if (vc->vc_ques) {
1812 if (vc->vc_par[0])
1813 vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16);
1814 else
9ea9a886 1815 vc->vc_cursor_type = cur_default;
1da177e4
LT		 1816 return;
1817 }
1818 break;
1819 case 'm':
1820 if (vc->vc_ques) {
1821 clear_selection();
1822 if (vc->vc_par[0])
1823 vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1];
1824 else
1825 vc->vc_complement_mask = vc->vc_s_complement_mask;
1826 return;
1827 }
1828 break;
1829 case 'n':
1830 if (!vc->vc_ques) {
1831 if (vc->vc_par[0] == 5)
1832 status_report(tty);
1833 else if (vc->vc_par[0] == 6)
1834 cursor_report(vc, tty);
1835 }
1836 return;
1837 }
1838 if (vc->vc_ques) {
1839 vc->vc_ques = 0;
1840 return;
1841 }
1842 switch(c) {
1843 case 'G': case '`':
1844 if (vc->vc_par[0])
1845 vc->vc_par[0]--;
1846 gotoxy(vc, vc->vc_par[0], vc->vc_y);
1847 return;
1848 case 'A':
1849 if (!vc->vc_par[0])
1850 vc->vc_par[0]++;
1851 gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]);
1852 return;
1853 case 'B': case 'e':
1854 if (!vc->vc_par[0])
1855 vc->vc_par[0]++;
1856 gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]);
1857 return;
1858 case 'C': case 'a':
1859 if (!vc->vc_par[0])
1860 vc->vc_par[0]++;
1861 gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y);
1862 return;
1863 case 'D':
1864 if (!vc->vc_par[0])
1865 vc->vc_par[0]++;
1866 gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y);
1867 return;
1868 case 'E':
1869 if (!vc->vc_par[0])
1870 vc->vc_par[0]++;
1871 gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]);
1872 return;
1873 case 'F':
1874 if (!vc->vc_par[0])
1875 vc->vc_par[0]++;
1876 gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]);
1877 return;
1878 case 'd':
1879 if (vc->vc_par[0])
1880 vc->vc_par[0]--;
1881 gotoxay(vc, vc->vc_x ,vc->vc_par[0]);
1882 return;
1883 case 'H': case 'f':
1884 if (vc->vc_par[0])
1885 vc->vc_par[0]--;
1886 if (vc->vc_par[1])
1887 vc->vc_par[1]--;
1888 gotoxay(vc, vc->vc_par[1], vc->vc_par[0]);
1889 return;
1890 case 'J':
1891 csi_J(vc, vc->vc_par[0]);
1892 return;
1893 case 'K':
1894 csi_K(vc, vc->vc_par[0]);
1895 return;
1896 case 'L':
1897 csi_L(vc, vc->vc_par[0]);
1898 return;
1899 case 'M':
1900 csi_M(vc, vc->vc_par[0]);
1901 return;
1902 case 'P':
1903 csi_P(vc, vc->vc_par[0]);
1904 return;
1905 case 'c':
1906 if (!vc->vc_par[0])
1907 respond_ID(tty);
1908 return;
1909 case 'g':
1910 if (!vc->vc_par[0])
1911 vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31));
1912 else if (vc->vc_par[0] == 3) {
1913 vc->vc_tab_stop[0] =
1914 vc->vc_tab_stop[1] =
1915 vc->vc_tab_stop[2] =
1916 vc->vc_tab_stop[3] =
a564738c
WK		 1917 vc->vc_tab_stop[4] =
1918 vc->vc_tab_stop[5] =
1919 vc->vc_tab_stop[6] =
1920 vc->vc_tab_stop[7] = 0;
1da177e4
LT		 1921 }
1922 return;
1923 case 'm':
1924 csi_m(vc);
1925 return;
1926 case 'q': /* DECLL - but only 3 leds */
1927 /* map 0,1,2,3 to 0,1,2,4 */
1928 if (vc->vc_par[0] < 4)
079c9534 1929 vt_set_led_state(vc->vc_num,
1da177e4
LT		 1930 (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4);
1931 return;
1932 case 'r':
1933 if (!vc->vc_par[0])
1934 vc->vc_par[0]++;
1935 if (!vc->vc_par[1])
1936 vc->vc_par[1] = vc->vc_rows;
1937 /* Minimum allowed region is 2 lines */
1938 if (vc->vc_par[0] < vc->vc_par[1] &&
1939 vc->vc_par[1] <= vc->vc_rows) {
1940 vc->vc_top = vc->vc_par[0] - 1;
1941 vc->vc_bottom = vc->vc_par[1];
1942 gotoxay(vc, 0, 0);
1943 }
1944 return;
1945 case 's':
1946 save_cur(vc);
1947 return;
1948 case 'u':
1949 restore_cur(vc);
1950 return;
1951 case 'X':
1952 csi_X(vc, vc->vc_par[0]);
1953 return;
1954 case '@':
1955 csi_at(vc, vc->vc_par[0]);
1956 return;
1957 case ']': /* setterm functions */
1958 setterm_command(vc);
1959 return;
1960 }
1961 return;
1962 case ESpercent:
1963 vc->vc_state = ESnormal;
1964 switch (c) {
1965 case '@': /* defined in ISO 2022 */
1966 vc->vc_utf = 0;
1967 return;
1968 case 'G': /* prelim official escape code */
1969 case '8': /* retained for compatibility */
1970 vc->vc_utf = 1;
1971 return;
1972 }
1973 return;
1974 case ESfunckey:
1975 vc->vc_state = ESnormal;
1976 return;
1977 case EShash:
1978 vc->vc_state = ESnormal;
1979 if (c == '8') {
1980 /* DEC screen alignment test. kludge :-) */
1981 vc->vc_video_erase_char =
1982 (vc->vc_video_erase_char & 0xff00) | 'E';
1983 csi_J(vc, 2);
1984 vc->vc_video_erase_char =
1985 (vc->vc_video_erase_char & 0xff00) | ' ';
1986 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
1987 }
1988 return;
1989 case ESsetG0:
1990 if (c == '0')
1991 vc->vc_G0_charset = GRAF_MAP;
1992 else if (c == 'B')
1993 vc->vc_G0_charset = LAT1_MAP;
1994 else if (c == 'U')
1995 vc->vc_G0_charset = IBMPC_MAP;
1996 else if (c == 'K')
1997 vc->vc_G0_charset = USER_MAP;
1998 if (vc->vc_charset == 0)
1999 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
2000 vc->vc_state = ESnormal;
2001 return;
2002 case ESsetG1:
2003 if (c == '0')
2004 vc->vc_G1_charset = GRAF_MAP;
2005 else if (c == 'B')
2006 vc->vc_G1_charset = LAT1_MAP;
2007 else if (c == 'U')
2008 vc->vc_G1_charset = IBMPC_MAP;
2009 else if (c == 'K')
2010 vc->vc_G1_charset = USER_MAP;
2011 if (vc->vc_charset == 1)
2012 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
2013 vc->vc_state = ESnormal;
2014 return;
2015 default:
2016 vc->vc_state = ESnormal;
2017 }
2018}
2019
2f1a2ccb 2020/* is_double_width() is based on the wcwidth() implementation by
1ed8a2b3 2021 * Markus Kuhn -- 2007-05-26 (Unicode 5.0)
2f1a2ccb
EK		 2022 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
2023 */
2024struct interval {
2025 uint32_t first;
2026 uint32_t last;
2027};
2028
2029static int bisearch(uint32_t ucs, const struct interval *table, int max)
2030{
2031 int min = 0;
2032 int mid;
2033
2034 if (ucs < table[0].first || ucs > table[max].last)
2035 return 0;
2036 while (max >= min) {
2037 mid = (min + max) / 2;
2038 if (ucs > table[mid].last)
2039 min = mid + 1;
2040 else if (ucs < table[mid].first)
2041 max = mid - 1;
2042 else
2043 return 1;
2044 }
2045 return 0;
2046}
2047
2048static int is_double_width(uint32_t ucs)
2049{
2050 static const struct interval double_width[] = {
2051 { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E },
2052 { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF },
1ed8a2b3
EK		 2053 { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 },
2054 { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD }
2f1a2ccb 2055 };
0f11541b 2056 return bisearch(ucs, double_width, ARRAY_SIZE(double_width) - 1);
2f1a2ccb
EK		 2057}
2058
ac751efa 2059/* acquires console_lock */
1da177e4
LT		 2060static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2061{
2062#ifdef VT_BUF_VRAM_ONLY
2063#define FLUSH do { } while(0);
2064#else
2065#define FLUSH if (draw_x >= 0) { \
2066 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
2067 draw_x = -1; \
2068 }
2069#endif
2070
2071 int c, tc, ok, n = 0, draw_x = -1;
2072 unsigned int currcons;
2073 unsigned long draw_from = 0, draw_to = 0;
2074 struct vc_data *vc;
2f1a2ccb 2075 unsigned char vc_attr;
0341a4d0 2076 struct vt_notifier_param param;
2f1a2ccb
EK		 2077 uint8_t rescan;
2078 uint8_t inverse;
2079 uint8_t width;
1da177e4 2080 u16 himask, charmask;
1da177e4
LT		 2081
2082 if (in_interrupt())
2083 return count;
2084
2085 might_sleep();
2086
ac751efa 2087 console_lock();
1da177e4
LT		 2088 vc = tty->driver_data;
2089 if (vc == NULL) {
2090 printk(KERN_ERR "vt: argh, driver_data is NULL !\n");
ac751efa 2091 console_unlock();
1da177e4
LT		 2092 return 0;
2093 }
2094
2095 currcons = vc->vc_num;
2096 if (!vc_cons_allocated(currcons)) {
1ffdda95
MSB		 2097 /* could this happen? */
2098 pr_warn_once("con_write: tty %d not allocated\n", currcons+1);
2099 console_unlock();
2100 return 0;
1da177e4 2101 }
1da177e4 2102
1da177e4
LT		 2103 himask = vc->vc_hi_font_mask;
2104 charmask = himask ? 0x1ff : 0xff;
2105
2106 /* undraw cursor first */
2107 if (IS_FG(vc))
2108 hide_cursor(vc);
2109
0341a4d0
KD		 2110 param.vc = vc;
2111
1da177e4
LT		 2112 while (!tty->stopped && count) {
2113 int orig = *buf;
2114 c = orig;
2115 buf++;
2116 n++;
2117 count--;
2f1a2ccb
EK		 2118 rescan = 0;
2119 inverse = 0;
2120 width = 1;
1da177e4
LT		 2121
2122 /* Do no translation at all in control states */
2123 if (vc->vc_state != ESnormal) {
2124 tc = c;
d4328b40 2125 } else if (vc->vc_utf && !vc->vc_disp_ctrl) {
2f1a2ccb
EK		 2126 /* Combine UTF-8 into Unicode in vc_utf_char.
2127 * vc_utf_count is the number of continuation bytes still
2128 * expected to arrive.
2129 * vc_npar is the number of continuation bytes arrived so
2130 * far
2131 */
d4328b40 2132rescan_last_byte:
2f1a2ccb
EK		 2133 if ((c & 0xc0) == 0x80) {
2134 /* Continuation byte received */
2135 static const uint32_t utf8_length_changes[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff };
d4328b40 2136 if (vc->vc_utf_count) {
2f1a2ccb
EK		 2137 vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f);
2138 vc->vc_npar++;
2139 if (--vc->vc_utf_count) {
2140 /* Still need some bytes */
1da177e4 2141 continue;
2f1a2ccb
EK		 2142 }
2143 /* Got a whole character */
2144 c = vc->vc_utf_char;
2145 /* Reject overlong sequences */
2146 if (c <= utf8_length_changes[vc->vc_npar - 1] ||
2147 c > utf8_length_changes[vc->vc_npar])
2148 c = 0xfffd;
2149 } else {
2150 /* Unexpected continuation byte */
2151 vc->vc_utf_count = 0;
2152 c = 0xfffd;
2153 }
1da177e4 2154 } else {
2f1a2ccb
EK		 2155 /* Single ASCII byte or first byte of a sequence received */
2156 if (vc->vc_utf_count) {
2157 /* Continuation byte expected */
2158 rescan = 1;
2159 vc->vc_utf_count = 0;
2160 c = 0xfffd;
2161 } else if (c > 0x7f) {
2162 /* First byte of a multibyte sequence received */
2163 vc->vc_npar = 0;
2164 if ((c & 0xe0) == 0xc0) {
2165 vc->vc_utf_count = 1;
2166 vc->vc_utf_char = (c & 0x1f);
2167 } else if ((c & 0xf0) == 0xe0) {
2168 vc->vc_utf_count = 2;
2169 vc->vc_utf_char = (c & 0x0f);
2170 } else if ((c & 0xf8) == 0xf0) {
2171 vc->vc_utf_count = 3;
2172 vc->vc_utf_char = (c & 0x07);
2173 } else if ((c & 0xfc) == 0xf8) {
2174 vc->vc_utf_count = 4;
2175 vc->vc_utf_char = (c & 0x03);
2176 } else if ((c & 0xfe) == 0xfc) {
2177 vc->vc_utf_count = 5;
2178 vc->vc_utf_char = (c & 0x01);
2179 } else {
2180 /* 254 and 255 are invalid */
2181 c = 0xfffd;
2182 }
2183 if (vc->vc_utf_count) {
2184 /* Still need some bytes */
2185 continue;
2186 }
2187 }
2188 /* Nothing to do if an ASCII byte was received */
1da177e4 2189 }
2f1a2ccb
EK		 2190 /* End of UTF-8 decoding. */
2191 /* c is the received character, or U+FFFD for invalid sequences. */
2192 /* Replace invalid Unicode code points with U+FFFD too */
2193 if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff)
2194 c = 0xfffd;
2195 tc = c;
d4328b40 2196 } else { /* no utf or alternate charset mode */
a29ccf6f 2197 tc = vc_translate(vc, c);
1da177e4
LT		 2198 }
2199
0341a4d0
KD		 2200 param.c = tc;
2201 if (atomic_notifier_call_chain(&vt_notifier_list, VT_PREWRITE,
2202 &param) == NOTIFY_STOP)
2203 continue;
2204
1da177e4
LT		 2205 /* If the original code was a control character we
2206 * only allow a glyph to be displayed if the code is
2207 * not normally used (such as for cursor movement) or
2208 * if the disp_ctrl mode has been explicitly enabled.
2209 * Certain characters (as given by the CTRL_ALWAYS
2210 * bitmap) are always displayed as control characters,
2211 * as the console would be pretty useless without
2212 * them; to display an arbitrary font position use the
2213 * direct-to-font zone in UTF-8 mode.
2214 */
2215 ok = tc && (c >= 32 ||
d4328b40
AT		 2216 !(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 :
2217 vc->vc_utf || ((CTRL_ACTION >> c) & 1)))
1da177e4
LT		 2218 && (c != 127 || vc->vc_disp_ctrl)
2219 && (c != 128+27);
2220
2221 if (vc->vc_state == ESnormal && ok) {
2f1a2ccb
EK		 2222 if (vc->vc_utf && !vc->vc_disp_ctrl) {
2223 if (is_double_width(c))
2224 width = 2;
2225 }
1da177e4
LT		 2226 /* Now try to find out how to display it */
2227 tc = conv_uni_to_pc(vc, tc);
d4328b40 2228 if (tc & ~charmask) {
2f1a2ccb
EK		 2229 if (tc == -1 || tc == -2) {
2230 continue; /* nothing to display */
2231 }
2232 /* Glyph not found */
c0b79882 2233 if ((!(vc->vc_utf && !vc->vc_disp_ctrl) || c < 128) && !(c & ~charmask)) {
2f1a2ccb 2234 /* In legacy mode use the glyph we get by a 1:1 mapping.
1ed8a2b3
EK		 2235 This would make absolutely no sense with Unicode in mind,
2236 but do this for ASCII characters since a font may lack
2237 Unicode mapping info and we don't want to end up with
2238 having question marks only. */
2f1a2ccb
EK		 2239 tc = c;
2240 } else {
2241 /* Display U+FFFD. If it's not found, display an inverse question mark. */
2242 tc = conv_uni_to_pc(vc, 0xfffd);
2243 if (tc < 0) {
2244 inverse = 1;
2245 tc = conv_uni_to_pc(vc, '?');
2246 if (tc < 0) tc = '?';
2247 }
2248 }
d4328b40 2249 }
1da177e4 2250
2f1a2ccb
EK		 2251 if (!inverse) {
2252 vc_attr = vc->vc_attr;
1da177e4 2253 } else {
2f1a2ccb
EK		 2254 /* invert vc_attr */
2255 if (!vc->vc_can_do_color) {
2256 vc_attr = (vc->vc_attr) ^ 0x08;
2257 } else if (vc->vc_hi_font_mask == 0x100) {
2258 vc_attr = ((vc->vc_attr) & 0x11) | (((vc->vc_attr) & 0xe0) >> 4) | (((vc->vc_attr) & 0x0e) << 4);
2259 } else {
2260 vc_attr = ((vc->vc_attr) & 0x88) | (((vc->vc_attr) & 0x70) >> 4) | (((vc->vc_attr) & 0x07) << 4);
2261 }
1ed8a2b3 2262 FLUSH
1da177e4 2263 }
2f1a2ccb
EK		 2264
2265 while (1) {
2266 if (vc->vc_need_wrap || vc->vc_decim)
2267 FLUSH
2268 if (vc->vc_need_wrap) {
2269 cr(vc);
2270 lf(vc);
2271 }
2272 if (vc->vc_decim)
2273 insert_char(vc, 1);
2274 scr_writew(himask ?
2275 ((vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) :
2276 (vc_attr << 8) + tc,
2277 (u16 *) vc->vc_pos);
2278 if (DO_UPDATE(vc) && draw_x < 0) {
2279 draw_x = vc->vc_x;
2280 draw_from = vc->vc_pos;
2281 }
2282 if (vc->vc_x == vc->vc_cols - 1) {
2283 vc->vc_need_wrap = vc->vc_decawm;
2284 draw_to = vc->vc_pos + 2;
2285 } else {
2286 vc->vc_x++;
2287 draw_to = (vc->vc_pos += 2);
d4328b40 2288 }
2f1a2ccb
EK		 2289
2290 if (!--width) break;
2291
2292 tc = conv_uni_to_pc(vc, ' '); /* A space is printed in the second column */
2293 if (tc < 0) tc = ' ';
2294 }
b293d758 2295 notify_write(vc, c);
2f1a2ccb 2296
1ed8a2b3
EK		 2297 if (inverse) {
2298 FLUSH
2299 }
2300
2f1a2ccb
EK		 2301 if (rescan) {
2302 rescan = 0;
2303 inverse = 0;
2304 width = 1;
d4328b40
AT		 2305 c = orig;
2306 goto rescan_last_byte;
2307 }
1da177e4
LT		 2308 continue;
2309 }
2310 FLUSH
2311 do_con_trol(tty, vc, orig);
2312 }
2313 FLUSH
2314 console_conditional_schedule();
ac751efa 2315 console_unlock();
b293d758 2316 notify_update(vc);
1da177e4
LT		 2317 return n;
2318#undef FLUSH
2319}
2320
2321/*
2322 * This is the console switching callback.
2323 *
2324 * Doing console switching in a process context allows
2325 * us to do the switches asynchronously (needed when we want
2326 * to switch due to a keyboard interrupt). Synchronization
2327 * with other console code and prevention of re-entrancy is
ac751efa 2328 * ensured with console_lock.
1da177e4 2329 */
65f27f38 2330static void console_callback(struct work_struct *ignored)
1da177e4 2331{
ac751efa 2332 console_lock();
1da177e4
LT		 2333
2334 if (want_console >= 0) {
2335 if (want_console != fg_console &&
2336 vc_cons_allocated(want_console)) {
2337 hide_cursor(vc_cons[fg_console].d);
2338 change_console(vc_cons[want_console].d);
2339 /* we only changed when the console had already
2340 been allocated - a new console is not created
2341 in an interrupt routine */
2342 }
2343 want_console = -1;
2344 }
2345 if (do_poke_blanked_console) { /* do not unblank for a LED change */
2346 do_poke_blanked_console = 0;
2347 poke_blanked_console();
2348 }
2349 if (scrollback_delta) {
2350 struct vc_data *vc = vc_cons[fg_console].d;
2351 clear_selection();
2352 if (vc->vc_mode == KD_TEXT)
2353 vc->vc_sw->con_scrolldelta(vc, scrollback_delta);
2354 scrollback_delta = 0;
2355 }
2356 if (blank_timer_expired) {
2357 do_blank_screen(0);
2358 blank_timer_expired = 0;
2359 }
b293d758 2360 notify_update(vc_cons[fg_console].d);
1da177e4 2361
ac751efa 2362 console_unlock();
1da177e4
LT		 2363}
2364
b257bc05 2365int set_console(int nr)
1da177e4 2366{
b257bc05
AJ		 2367 struct vc_data *vc = vc_cons[fg_console].d;
2368
2369 if (!vc_cons_allocated(nr) || vt_dont_switch ||
2370 (vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) {
2371
2372 /*
2373 * Console switch will fail in console_callback() or
2374 * change_console() so there is no point scheduling
2375 * the callback
2376 *
2377 * Existing set_console() users don't check the return
2378 * value so this shouldn't break anything
2379 */
2380 return -EINVAL;
2381 }
2382
1da177e4
LT		 2383 want_console = nr;
2384 schedule_console_callback();
b257bc05
AJ		 2385
2386 return 0;
1da177e4
LT		 2387}
2388
2389struct tty_driver *console_driver;
2390
2391#ifdef CONFIG_VT_CONSOLE
2392
5ada918b
BW		 2393/**
2394 * vt_kmsg_redirect() - Sets/gets the kernel message console
2395 * @new: The new virtual terminal number or -1 if the console should stay
2396 * unchanged
2397 *
2398 * By default, the kernel messages are always printed on the current virtual
2399 * console. However, the user may modify that default with the
2400 * TIOCL_SETKMSGREDIRECT ioctl call.
2401 *
2402 * This function sets the kernel message console to be @new. It returns the old
2403 * virtual console number. The virtual terminal number 0 (both as parameter and
2404 * return value) means no redirection (i.e. always printed on the currently
2405 * active console).
2406 *
2407 * The parameter -1 means that only the current console is returned, but the
2408 * value is not modified. You may use the macro vt_get_kmsg_redirect() in that
2409 * case to make the code more understandable.
2410 *
2411 * When the kernel is compiled without CONFIG_VT_CONSOLE, this function ignores
2412 * the parameter and always returns 0.
2413 */
2414int vt_kmsg_redirect(int new)
2415{
2416 static int kmsg_con;
2417
2418 if (new != -1)
2419 return xchg(&kmsg_con, new);
2420 else
2421 return kmsg_con;
2422}
2423
1da177e4
LT		 2424/*
2425 * Console on virtual terminal
2426 *
2427 * The console must be locked when we get here.
2428 */
2429
2430static void vt_console_print(struct console *co, const char *b, unsigned count)
2431{
2432 struct vc_data *vc = vc_cons[fg_console].d;
2433 unsigned char c;
b0940003 2434 static DEFINE_SPINLOCK(printing_lock);
1da177e4
LT		 2435 const ushort *start;
2436 ushort cnt = 0;
2437 ushort myx;
5ada918b 2438 int kmsg_console;
1da177e4
LT		 2439
2440 /* console busy or not yet initialized */
b0940003
NP		 2441 if (!printable)
2442 return;
2443 if (!spin_trylock(&printing_lock))
1da177e4
LT		 2444 return;
2445
5ada918b
BW		 2446 kmsg_console = vt_get_kmsg_redirect();
2447 if (kmsg_console && vc_cons_allocated(kmsg_console - 1))
2448 vc = vc_cons[kmsg_console - 1].d;
1da177e4
LT		 2449
2450 /* read `x' only after setting currcons properly (otherwise
2451 the `x' macro will read the x of the foreground console). */
2452 myx = vc->vc_x;
2453
2454 if (!vc_cons_allocated(fg_console)) {
2455 /* impossible */
2456 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2457 goto quit;
2458 }
2459
8fd4bd22 2460 if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc))
1da177e4
LT		 2461 goto quit;
2462
2463 /* undraw cursor first */
2464 if (IS_FG(vc))
2465 hide_cursor(vc);
2466
2467 start = (ushort *)vc->vc_pos;
2468
2469 /* Contrived structure to try to emulate original need_wrap behaviour
2470 * Problems caused when we have need_wrap set on '\n' character */
2471 while (count--) {
2472 c = *b++;
2473 if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) {
2474 if (cnt > 0) {
2475 if (CON_IS_VISIBLE(vc))
2476 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2477 vc->vc_x += cnt;
2478 if (vc->vc_need_wrap)
2479 vc->vc_x--;
2480 cnt = 0;
2481 }
2482 if (c == 8) { /* backspace */
2483 bs(vc);
2484 start = (ushort *)vc->vc_pos;
2485 myx = vc->vc_x;
2486 continue;
2487 }
2488 if (c != 13)
2489 lf(vc);
2490 cr(vc);
2491 start = (ushort *)vc->vc_pos;
2492 myx = vc->vc_x;
2493 if (c == 10 || c == 13)
2494 continue;
2495 }
2496 scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos);
b293d758 2497 notify_write(vc, c);
1da177e4
LT		 2498 cnt++;
2499 if (myx == vc->vc_cols - 1) {
2500 vc->vc_need_wrap = 1;
2501 continue;
2502 }
2503 vc->vc_pos += 2;
2504 myx++;
2505 }
2506 if (cnt > 0) {
2507 if (CON_IS_VISIBLE(vc))
2508 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2509 vc->vc_x += cnt;
2510 if (vc->vc_x == vc->vc_cols) {
2511 vc->vc_x--;
2512 vc->vc_need_wrap = 1;
2513 }
2514 }
2515 set_cursor(vc);
b293d758 2516 notify_update(vc);
1da177e4
LT		 2517
2518quit:
b0940003 2519 spin_unlock(&printing_lock);
1da177e4
LT		 2520}
2521
2522static struct tty_driver *vt_console_device(struct console *c, int *index)
2523{
2524 *index = c->index ? c->index-1 : fg_console;
2525 return console_driver;
2526}
2527
2528static struct console vt_console_driver = {
2529 .name = "tty",
2530 .write = vt_console_print,
2531 .device = vt_console_device,
2532 .unblank = unblank_screen,
2533 .flags = CON_PRINTBUFFER,
2534 .index = -1,
2535};
2536#endif
2537
2538/*
2539 * Handling of Linux-specific VC ioctls
2540 */
2541
2542/*
ac751efa 2543 * Generally a bit racy with respect to console_lock();.
1da177e4
LT		 2544 *
2545 * There are some functions which don't need it.
2546 *
2547 * There are some functions which can sleep for arbitrary periods
2548 * (paste_selection) but we don't need the lock there anyway.
2549 *
2550 * set_selection has locking, and definitely needs it
2551 */
2552
2553int tioclinux(struct tty_struct *tty, unsigned long arg)
2554{
2555 char type, data;
2556 char __user *p = (char __user *)arg;
2557 int lines;
2558 int ret;
2559
1da177e4
LT		 2560 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN))
2561 return -EPERM;
2562 if (get_user(type, p))
2563 return -EFAULT;
2564 ret = 0;
04f378b1 2565
1da177e4
LT		 2566 switch (type)
2567 {
2568 case TIOCL_SETSEL:
ac751efa 2569 console_lock();
1da177e4 2570 ret = set_selection((struct tiocl_selection __user *)(p+1), tty);
ac751efa 2571 console_unlock();
1da177e4
LT		 2572 break;
2573 case TIOCL_PASTESEL:
2574 ret = paste_selection(tty);
2575 break;
2576 case TIOCL_UNBLANKSCREEN:
ac751efa 2577 console_lock();
1da177e4 2578 unblank_screen();
ac751efa 2579 console_unlock();
1da177e4
LT		 2580 break;
2581 case TIOCL_SELLOADLUT:
5289475d 2582 console_lock();
1da177e4 2583 ret = sel_loadlut(p);
5289475d 2584 console_unlock();
1da177e4
LT		 2585 break;
2586 case TIOCL_GETSHIFTSTATE:
04f378b1 2587
1da177e4
LT		 2588 /*
2589 * Make it possible to react to Shift+Mousebutton.
2590 * Note that 'shift_state' is an undocumented
2591 * kernel-internal variable; programs not closely
2592 * related to the kernel should not use this.
2593 */
079c9534 2594 data = vt_get_shift_state();
1da177e4
LT		 2595 ret = __put_user(data, p);
2596 break;
2597 case TIOCL_GETMOUSEREPORTING:
20f62579 2598 console_lock(); /* May be overkill */
1da177e4 2599 data = mouse_reporting();
20f62579 2600 console_unlock();
1da177e4
LT		 2601 ret = __put_user(data, p);
2602 break;
2603 case TIOCL_SETVESABLANK:
20f62579 2604 console_lock();
403aac96 2605 ret = set_vesa_blanking(p);
20f62579 2606 console_unlock();
1da177e4 2607 break;
0ca07731 2608 case TIOCL_GETKMSGREDIRECT:
5ada918b 2609 data = vt_get_kmsg_redirect();
0ca07731
RW		 2610 ret = __put_user(data, p);
2611 break;
1da177e4
LT		 2612 case TIOCL_SETKMSGREDIRECT:
2613 if (!capable(CAP_SYS_ADMIN)) {
2614 ret = -EPERM;
2615 } else {
2616 if (get_user(data, p+1))
2617 ret = -EFAULT;
2618 else
5ada918b 2619 vt_kmsg_redirect(data);
1da177e4
LT		 2620 }
2621 break;
2622 case TIOCL_GETFGCONSOLE:
20f62579
AC		 2623 /* No locking needed as this is a transiently
2624 correct return anyway if the caller hasn't
2625 disabled switching */
1da177e4
LT		 2626 ret = fg_console;
2627 break;
2628 case TIOCL_SCROLLCONSOLE:
2629 if (get_user(lines, (s32 __user *)(p+4))) {
2630 ret = -EFAULT;
2631 } else {
20f62579
AC		 2632 /* Need the console lock here. Note that lots
2633 of other calls need fixing before the lock
2634 is actually useful ! */
2635 console_lock();
1da177e4 2636 scrollfront(vc_cons[fg_console].d, lines);
20f62579 2637 console_unlock();
1da177e4
LT		 2638 ret = 0;
2639 }
2640 break;
2641 case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
ac751efa 2642 console_lock();
1da177e4
LT		 2643 ignore_poke = 1;
2644 do_blank_screen(0);
ac751efa 2645 console_unlock();
1da177e4
LT		 2646 break;
2647 case TIOCL_BLANKEDSCREEN:
2648 ret = console_blanked;
2649 break;
2650 default:
2651 ret = -EINVAL;
2652 break;
2653 }
2654 return ret;
2655}
2656
2657/*
2658 * /dev/ttyN handling
2659 */
2660
2661static int con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2662{
2663 int retval;
2664
2665 retval = do_con_write(tty, buf, count);
2666 con_flush_chars(tty);
2667
2668 return retval;
2669}
2670
5d19f546 2671static int con_put_char(struct tty_struct *tty, unsigned char ch)
1da177e4
LT		 2672{
2673 if (in_interrupt())
5d19f546
AC		 2674 return 0; /* n_r3964 calls put_char() from interrupt context */
2675 return do_con_write(tty, &ch, 1);
1da177e4
LT		 2676}
2677
2678static int con_write_room(struct tty_struct *tty)
2679{
2680 if (tty->stopped)
2681 return 0;
a88a69c9 2682 return 32768; /* No limit, really; we're not buffering */
1da177e4
LT		 2683}
2684
2685static int con_chars_in_buffer(struct tty_struct *tty)
2686{
2687 return 0; /* we're not buffering */
2688}
2689
2690/*
2691 * con_throttle and con_unthrottle are only used for
2692 * paste_selection(), which has to stuff in a large number of
2693 * characters...
2694 */
2695static void con_throttle(struct tty_struct *tty)
2696{
2697}
2698
2699static void con_unthrottle(struct tty_struct *tty)
2700{
2701 struct vc_data *vc = tty->driver_data;
2702
2703 wake_up_interruptible(&vc->paste_wait);
2704}
2705
2706/*
2707 * Turn the Scroll-Lock LED on when the tty is stopped
2708 */
2709static void con_stop(struct tty_struct *tty)
2710{
2711 int console_num;
2712 if (!tty)
2713 return;
2714 console_num = tty->index;
2715 if (!vc_cons_allocated(console_num))
2716 return;
079c9534 2717 vt_kbd_con_stop(console_num);
1da177e4
LT		 2718}
2719
2720/*
2721 * Turn the Scroll-Lock LED off when the console is started
2722 */
2723static void con_start(struct tty_struct *tty)
2724{
2725 int console_num;
2726 if (!tty)
2727 return;
2728 console_num = tty->index;
2729 if (!vc_cons_allocated(console_num))
2730 return;
079c9534 2731 vt_kbd_con_start(console_num);
1da177e4
LT		 2732}
2733
2734static void con_flush_chars(struct tty_struct *tty)
2735{
2736 struct vc_data *vc;
2737
2738 if (in_interrupt()) /* from flush_to_ldisc */
2739 return;
2740
2741 /* if we race with con_close(), vt may be null */
ac751efa 2742 console_lock();
1da177e4
LT		 2743 vc = tty->driver_data;
2744 if (vc)
2745 set_cursor(vc);
ac751efa 2746 console_unlock();
1da177e4
LT		 2747}
2748
2749/*
2750 * Allocate the console screen memory.
2751 */
bc1e99d9 2752static int con_install(struct tty_driver *driver, struct tty_struct *tty)
1da177e4
LT		 2753{
2754 unsigned int currcons = tty->index;
bc1e99d9
JS		 2755 struct vc_data *vc;
2756 int ret;
1da177e4 2757
ac751efa 2758 console_lock();
bc1e99d9
JS		 2759 ret = vc_allocate(currcons);
2760 if (ret)
2761 goto unlock;
feebed65 2762
bc1e99d9 2763 vc = vc_cons[currcons].d;
1da177e4 2764
bc1e99d9
JS		 2765 /* Still being freed */
2766 if (vc->port.tty) {
2767 ret = -ERESTARTSYS;
2768 goto unlock;
2769 }
2770
2771 ret = tty_port_install(&vc->port, driver, tty);
2772 if (ret)
2773 goto unlock;
2774
2775 tty->driver_data = vc;
2776 vc->port.tty = tty;
2777
2778 if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
2779 tty->winsize.ws_row = vc_cons[currcons].d->vc_rows;
2780 tty->winsize.ws_col = vc_cons[currcons].d->vc_cols;
1da177e4 2781 }
bc1e99d9 2782 if (vc->vc_utf)
adc8d746 2783 tty->termios.c_iflag |= IUTF8;
bc1e99d9 2784 else
adc8d746 2785 tty->termios.c_iflag &= ~IUTF8;
bc1e99d9 2786unlock:
ac751efa 2787 console_unlock();
1da177e4
LT		 2788 return ret;
2789}
2790
bc1e99d9
JS		 2791static int con_open(struct tty_struct *tty, struct file *filp)
2792{
2793 /* everything done in install */
2794 return 0;
2795}
2796
2797
1da177e4
LT		 2798static void con_close(struct tty_struct *tty, struct file *filp)
2799{
feebed65
AC		 2800 /* Nothing to do - we defer to shutdown */
2801}
1da177e4 2802
feebed65
AC		 2803static void con_shutdown(struct tty_struct *tty)
2804{
2805 struct vc_data *vc = tty->driver_data;
2806 BUG_ON(vc == NULL);
ac751efa 2807 console_lock();
8ce73264 2808 vc->port.tty = NULL;
ac751efa 2809 console_unlock();
1da177e4
LT		 2810}
2811
fa6ce9ab
JE		 2812static int default_italic_color = 2; // green (ASCII)
2813static int default_underline_color = 3; // cyan (ASCII)
2814module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR);
2815module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR);
2816
1da177e4
LT		 2817static void vc_init(struct vc_data *vc, unsigned int rows,
2818 unsigned int cols, int do_clear)
2819{
2820 int j, k ;
2821
2822 vc->vc_cols = cols;
2823 vc->vc_rows = rows;
2824 vc->vc_size_row = cols << 1;
2825 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
2826
2827 set_origin(vc);
2828 vc->vc_pos = vc->vc_origin;
2829 reset_vc(vc);
2830 for (j=k=0; j<16; j++) {
2831 vc->vc_palette[k++] = default_red[j] ;
2832 vc->vc_palette[k++] = default_grn[j] ;
2833 vc->vc_palette[k++] = default_blu[j] ;
2834 }
2835 vc->vc_def_color = 0x07; /* white */
fa6ce9ab
JE		 2836 vc->vc_ulcolor = default_underline_color;
2837 vc->vc_itcolor = default_italic_color;
1da177e4
LT		 2838 vc->vc_halfcolor = 0x08; /* grey */
2839 init_waitqueue_head(&vc->paste_wait);
2840 reset_terminal(vc, do_clear);
2841}
2842
2843/*
2844 * This routine initializes console interrupts, and does nothing
2845 * else. If you want the screen to clear, call tty_write with
2846 * the appropriate escape-sequence.
2847 */
2848
2849static int __init con_init(void)
2850{
2851 const char *display_desc = NULL;
2852 struct vc_data *vc;
3e795de7 2853 unsigned int currcons = 0, i;
1da177e4 2854
ac751efa 2855 console_lock();
1da177e4
LT		 2856
2857 if (conswitchp)
2858 display_desc = conswitchp->con_startup();
2859 if (!display_desc) {
2860 fg_console = 0;
ac751efa 2861 console_unlock();
1da177e4
LT		 2862 return 0;
2863 }
2864
3e795de7
AD		 2865 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2866 struct con_driver *con_driver = &registered_con_driver[i];
2867
2868 if (con_driver->con == NULL) {
2869 con_driver->con = conswitchp;
2870 con_driver->desc = display_desc;
2871 con_driver->flag = CON_DRIVER_FLAG_INIT;
2872 con_driver->first = 0;
2873 con_driver->last = MAX_NR_CONSOLES - 1;
2874 break;
2875 }
2876 }
2877
2878 for (i = 0; i < MAX_NR_CONSOLES; i++)
2879 con_driver_map[i] = conswitchp;
2880
1da177e4
LT		 2881 if (blankinterval) {
2882 blank_state = blank_normal_wait;
f324edc8 2883 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
1da177e4
LT		 2884 }
2885
1da177e4 2886 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) {
a5f4f52e 2887 vc_cons[currcons].d = vc = kzalloc(sizeof(struct vc_data), GFP_NOWAIT);
7f1f86a0 2888 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
ff917ba4 2889 tty_port_init(&vc->port);
1da177e4 2890 visual_init(vc, currcons, 1);
a5f4f52e 2891 vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_NOWAIT);
1da177e4
LT		 2892 vc_init(vc, vc->vc_rows, vc->vc_cols,
2893 currcons || !vc->vc_sw->con_save_screen);
2894 }
2895 currcons = fg_console = 0;
2896 master_display_fg = vc = vc_cons[currcons].d;
2897 set_origin(vc);
2898 save_screen(vc);
2899 gotoxy(vc, vc->vc_x, vc->vc_y);
2900 csi_J(vc, 0);
2901 update_screen(vc);
5da527aa 2902 pr_info("Console: %s %s %dx%d\n",
1da177e4
LT		 2903 vc->vc_can_do_color ? "colour" : "mono",
2904 display_desc, vc->vc_cols, vc->vc_rows);
2905 printable = 1;
1da177e4 2906
ac751efa 2907 console_unlock();
1da177e4
LT		 2908
2909#ifdef CONFIG_VT_CONSOLE
2910 register_console(&vt_console_driver);
2911#endif
2912 return 0;
2913}
2914console_initcall(con_init);
2915
b68e31d0 2916static const struct tty_operations con_ops = {
bc1e99d9 2917 .install = con_install,
1da177e4
LT		 2918 .open = con_open,
2919 .close = con_close,
2920 .write = con_write,
2921 .write_room = con_write_room,
2922 .put_char = con_put_char,
2923 .flush_chars = con_flush_chars,
2924 .chars_in_buffer = con_chars_in_buffer,
2925 .ioctl = vt_ioctl,
e9216651
AB		 2926#ifdef CONFIG_COMPAT
2927 .compat_ioctl = vt_compat_ioctl,
2928#endif
1da177e4
LT		 2929 .stop = con_stop,
2930 .start = con_start,
2931 .throttle = con_throttle,
2932 .unthrottle = con_unthrottle,
8c9a9dd0 2933 .resize = vt_resize,
feebed65 2934 .shutdown = con_shutdown
1da177e4
LT		 2935};
2936
d81ed103
AC		 2937static struct cdev vc0_cdev;
2938
fbc92a34
KS		 2939static ssize_t show_tty_active(struct device *dev,
2940 struct device_attribute *attr, char *buf)
2941{
2942 return sprintf(buf, "tty%d\n", fg_console + 1);
2943}
2944static DEVICE_ATTR(active, S_IRUGO, show_tty_active, NULL);
2945
d81ed103 2946int __init vty_init(const struct file_operations *console_fops)
1da177e4 2947{
d81ed103
AC		 2948 cdev_init(&vc0_cdev, console_fops);
2949 if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) ||
2950 register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0)
2951 panic("Couldn't register /dev/tty0 driver\n");
fbc92a34
KS		 2952 tty0dev = device_create(tty_class, NULL, MKDEV(TTY_MAJOR, 0), NULL, "tty0");
2953 if (IS_ERR(tty0dev))
2954 tty0dev = NULL;
2955 else
a2a6a822 2956 WARN_ON(device_create_file(tty0dev, &dev_attr_active) < 0);
d81ed103 2957
1da177e4
LT		 2958 vcs_init();
2959
2960 console_driver = alloc_tty_driver(MAX_NR_CONSOLES);
2961 if (!console_driver)
2962 panic("Couldn't allocate console driver\n");
2f16669d 2963
1da177e4
LT		 2964 console_driver->name = "tty";
2965 console_driver->name_base = 1;
2966 console_driver->major = TTY_MAJOR;
2967 console_driver->minor_start = 1;
2968 console_driver->type = TTY_DRIVER_TYPE_CONSOLE;
2969 console_driver->init_termios = tty_std_termios;
c1236d31
ST		 2970 if (default_utf8)
2971 console_driver->init_termios.c_iflag |= IUTF8;
1da177e4
LT		 2972 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS;
2973 tty_set_operations(console_driver, &con_ops);
2974 if (tty_register_driver(console_driver))
2975 panic("Couldn't register console driver\n");
1da177e4
LT		 2976 kbd_init();
2977 console_map_init();
1da177e4
LT		 2978#ifdef CONFIG_MDA_CONSOLE
2979 mda_console_init();
2980#endif
2981 return 0;
2982}
2983
2984#ifndef VT_SINGLE_DRIVER
6db4063c
AD		 2985
2986static struct class *vtconsole_class;
2987
50e244cc 2988static int do_bind_con_driver(const struct consw *csw, int first, int last,
b7269dd2 2989 int deflt)
1da177e4 2990{
3e795de7
AD		 2991 struct module *owner = csw->owner;
2992 const char *desc = NULL;
2993 struct con_driver *con_driver;
2994 int i, j = -1, k = -1, retval = -ENODEV;
1da177e4 2995
1da177e4
LT		 2996 if (!try_module_get(owner))
2997 return -ENODEV;
2998
50e244cc 2999 WARN_CONSOLE_UNLOCKED();
1c8ce271 3000
3e795de7
AD		 3001 /* check if driver is registered */
3002 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3003 con_driver = &registered_con_driver[i];
3004
3005 if (con_driver->con == csw) {
3006 desc = con_driver->desc;
3007 retval = 0;
3008 break;
3009 }
3010 }
3011
3012 if (retval)
3013 goto err;
3014
3015 if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) {
3016 csw->con_startup();
3017 con_driver->flag |= CON_DRIVER_FLAG_INIT;
1da177e4 3018 }
1c8ce271 3019
1da177e4
LT		 3020 if (deflt) {
3021 if (conswitchp)
3022 module_put(conswitchp->owner);
1c8ce271 3023
1da177e4
LT		 3024 __module_get(owner);
3025 conswitchp = csw;
3026 }
3027
3e795de7
AD		 3028 first = max(first, con_driver->first);
3029 last = min(last, con_driver->last);
3030
1da177e4
LT		 3031 for (i = first; i <= last; i++) {
3032 int old_was_color;
3033 struct vc_data *vc = vc_cons[i].d;
3034
3035 if (con_driver_map[i])
3036 module_put(con_driver_map[i]->owner);
3037 __module_get(owner);
3038 con_driver_map[i] = csw;
3039
3040 if (!vc || !vc->vc_sw)
3041 continue;
3042
3043 j = i;
1c8ce271 3044
4ee1acce
DH		 3045 if (CON_IS_VISIBLE(vc)) {
3046 k = i;
1da177e4 3047 save_screen(vc);
4ee1acce
DH		 3048 }
3049
1da177e4
LT		 3050 old_was_color = vc->vc_can_do_color;
3051 vc->vc_sw->con_deinit(vc);
9fc2b2d0 3052 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
1da177e4 3053 visual_init(vc, i, 0);
1c8ce271 3054 set_origin(vc);
1da177e4
LT		 3055 update_attr(vc);
3056
3057 /* If the console changed between mono <-> color, then
3058 * the attributes in the screenbuf will be wrong. The
3059 * following resets all attributes to something sane.
3060 */
3061 if (old_was_color != vc->vc_can_do_color)
3062 clear_buffer_attributes(vc);
1da177e4 3063 }
4ee1acce 3064
1ffdda95 3065 pr_info("Console: switching ");
1da177e4
LT		 3066 if (!deflt)
3067 printk("consoles %d-%d ", first+1, last+1);
4ee1acce
DH		 3068 if (j >= 0) {
3069 struct vc_data *vc = vc_cons[j].d;
3070
1da177e4 3071 printk("to %s %s %dx%d\n",
4ee1acce
DH		 3072 vc->vc_can_do_color ? "colour" : "mono",
3073 desc, vc->vc_cols, vc->vc_rows);
3074
3075 if (k >= 0) {
3076 vc = vc_cons[k].d;
3077 update_screen(vc);
3078 }
3079 } else
1da177e4
LT		 3080 printk("to %s\n", desc);
3081
3e795de7
AD		 3082 retval = 0;
3083err:
1da177e4 3084 module_put(owner);
3e795de7
AD		 3085 return retval;
3086};
1da177e4 3087
50e244cc 3088
13ae6645
AD		 3089#ifdef CONFIG_VT_HW_CONSOLE_BINDING
3090static int con_is_graphics(const struct consw *csw, int first, int last)
3091{
3092 int i, retval = 0;
3093
3094 for (i = first; i <= last; i++) {
3095 struct vc_data *vc = vc_cons[i].d;
3096
3097 if (vc && vc->vc_mode == KD_GRAPHICS) {
3098 retval = 1;
3099 break;
3100 }
3101 }
3102
3103 return retval;
3104}
3105
e93a9a86
TI		 3106/* unlocked version of unbind_con_driver() */
3107int do_unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
1da177e4 3108{
3e795de7
AD		 3109 struct module *owner = csw->owner;
3110 const struct consw *defcsw = NULL;
3111 struct con_driver *con_driver = NULL, *con_back = NULL;
3112 int i, retval = -ENODEV;
1da177e4 3113
3e795de7
AD		 3114 if (!try_module_get(owner))
3115 return -ENODEV;
3116
e93a9a86 3117 WARN_CONSOLE_UNLOCKED();
3e795de7
AD		 3118
3119 /* check if driver is registered and if it is unbindable */
3120 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3121 con_driver = &registered_con_driver[i];
3122
3123 if (con_driver->con == csw &&
6db4063c 3124 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3e795de7
AD		 3125 retval = 0;
3126 break;
3127 }
3128 }
3129
e93a9a86 3130 if (retval)
3e795de7 3131 goto err;
3e795de7 3132
6db4063c
AD		 3133 retval = -ENODEV;
3134
3e795de7
AD		 3135 /* check if backup driver exists */
3136 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3137 con_back = &registered_con_driver[i];
3138
3139 if (con_back->con &&
6db4063c 3140 !(con_back->flag & CON_DRIVER_FLAG_MODULE)) {
3e795de7
AD		 3141 defcsw = con_back->con;
3142 retval = 0;
3143 break;
3144 }
3145 }
3146
e93a9a86 3147 if (retval)
3e795de7 3148 goto err;
3e795de7 3149
e93a9a86 3150 if (!con_is_bound(csw))
3e795de7 3151 goto err;
3e795de7
AD		 3152
3153 first = max(first, con_driver->first);
3154 last = min(last, con_driver->last);
3155
3156 for (i = first; i <= last; i++) {
1da177e4
LT		 3157 if (con_driver_map[i] == csw) {
3158 module_put(csw->owner);
3159 con_driver_map[i] = NULL;
3160 }
3e795de7
AD		 3161 }
3162
3163 if (!con_is_bound(defcsw)) {
6db4063c
AD		 3164 const struct consw *defconsw = conswitchp;
3165
3e795de7
AD		 3166 defcsw->con_startup();
3167 con_back->flag |= CON_DRIVER_FLAG_INIT;
6db4063c
AD		 3168 /*
3169 * vgacon may change the default driver to point
3170 * to dummycon, we restore it here...
3171 */
3172 conswitchp = defconsw;
3e795de7
AD		 3173 }
3174
3175 if (!con_is_bound(csw))
3176 con_driver->flag &= ~CON_DRIVER_FLAG_INIT;
3177
6db4063c 3178 /* ignore return value, binding should not fail */
50e244cc 3179 do_bind_con_driver(defcsw, first, last, deflt);
3e795de7
AD		 3180err:
3181 module_put(owner);
3182 return retval;
3183
3184}
e93a9a86 3185EXPORT_SYMBOL_GPL(do_unbind_con_driver);
3e795de7 3186
6db4063c
AD		 3187static int vt_bind(struct con_driver *con)
3188{
3189 const struct consw *defcsw = NULL, *csw = NULL;
3190 int i, more = 1, first = -1, last = -1, deflt = 0;
3191
3192 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3193 con_is_graphics(con->con, con->first, con->last))
3194 goto err;
3195
3196 csw = con->con;
3197
3198 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3199 struct con_driver *con = &registered_con_driver[i];
3200
3201 if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) {
3202 defcsw = con->con;
3203 break;
3204 }
3205 }
3206
3207 if (!defcsw)
3208 goto err;
3209
3210 while (more) {
3211 more = 0;
3212
3213 for (i = con->first; i <= con->last; i++) {
3214 if (con_driver_map[i] == defcsw) {
3215 if (first == -1)
3216 first = i;
3217 last = i;
3218 more = 1;
3219 } else if (first != -1)
3220 break;
3221 }
3222
3223 if (first == 0 && last == MAX_NR_CONSOLES -1)
3224 deflt = 1;
3225
c62a1e57
WY		 3226 if (first != -1) {
3227 console_lock();
3228 do_bind_con_driver(csw, first, last, deflt);
3229 console_unlock();
3230 }
6db4063c
AD		 3231
3232 first = -1;
3233 last = -1;
3234 deflt = 0;
3235 }
3236
3237err:
3238 return 0;
3239}
3240
3241static int vt_unbind(struct con_driver *con)
3242{
3243 const struct consw *csw = NULL;
3244 int i, more = 1, first = -1, last = -1, deflt = 0;
3245
3246 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3247 con_is_graphics(con->con, con->first, con->last))
3248 goto err;
3249
3250 csw = con->con;
3251
3252 while (more) {
3253 more = 0;
3254
3255 for (i = con->first; i <= con->last; i++) {
3256 if (con_driver_map[i] == csw) {
3257 if (first == -1)
3258 first = i;
3259 last = i;
3260 more = 1;
3261 } else if (first != -1)
3262 break;
3263 }
3264
3265 if (first == 0 && last == MAX_NR_CONSOLES -1)
3266 deflt = 1;
3267
618f2b90
WY		 3268 if (first != -1) {
3269 console_lock();
3270 do_unbind_con_driver(csw, first, last, deflt);
3271 console_unlock();
3272 }
6db4063c
AD		 3273
3274 first = -1;
3275 last = -1;
3276 deflt = 0;
3277 }
3278
3279err:
3280 return 0;
3281}
13ae6645
AD		 3282#else
3283static inline int vt_bind(struct con_driver *con)
3284{
3285 return 0;
3286}
3287static inline int vt_unbind(struct con_driver *con)
3288{
3289 return 0;
3290}
3291#endif /* CONFIG_VT_HW_CONSOLE_BINDING */
6db4063c 3292
805952a8 3293static ssize_t store_bind(struct device *dev, struct device_attribute *attr,
6db4063c
AD		 3294 const char *buf, size_t count)
3295{
805952a8 3296 struct con_driver *con = dev_get_drvdata(dev);
6db4063c
AD		 3297 int bind = simple_strtoul(buf, NULL, 0);
3298
3299 if (bind)
3300 vt_bind(con);
3301 else
3302 vt_unbind(con);
3303
3304 return count;
3305}
3306
805952a8
GKH		 3307static ssize_t show_bind(struct device *dev, struct device_attribute *attr,
3308 char *buf)
6db4063c 3309{
805952a8 3310 struct con_driver *con = dev_get_drvdata(dev);
6db4063c
AD		 3311 int bind = con_is_bound(con->con);
3312
3313 return snprintf(buf, PAGE_SIZE, "%i\n", bind);
3314}
3315
805952a8
GKH		 3316static ssize_t show_name(struct device *dev, struct device_attribute *attr,
3317 char *buf)
6db4063c 3318{
805952a8 3319 struct con_driver *con = dev_get_drvdata(dev);
6db4063c
AD		 3320
3321 return snprintf(buf, PAGE_SIZE, "%s %s\n",
3322 (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)",
3323 con->desc);
3324
3325}
3326
805952a8 3327static struct device_attribute device_attrs[] = {
6db4063c
AD		 3328 __ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind),
3329 __ATTR(name, S_IRUGO, show_name, NULL),
3330};
3331
805952a8 3332static int vtconsole_init_device(struct con_driver *con)
6db4063c
AD		 3333{
3334 int i;
928e964f 3335 int error = 0;
6db4063c 3336
928e964f 3337 con->flag |= CON_DRIVER_FLAG_ATTR;
805952a8
GKH		 3338 dev_set_drvdata(con->dev, con);
3339 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3340 error = device_create_file(con->dev, &device_attrs[i]);
928e964f
AD		 3341 if (error)
3342 break;
3343 }
6db4063c 3344
928e964f
AD		 3345 if (error) {
3346 while (--i >= 0)
805952a8 3347 device_remove_file(con->dev, &device_attrs[i]);
928e964f
AD		 3348 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3349 }
3350
3351 return error;
6db4063c
AD		 3352}
3353
805952a8 3354static void vtconsole_deinit_device(struct con_driver *con)
6db4063c
AD		 3355{
3356 int i;
3357
928e964f 3358 if (con->flag & CON_DRIVER_FLAG_ATTR) {
805952a8
GKH		 3359 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3360 device_remove_file(con->dev, &device_attrs[i]);
928e964f
AD		 3361 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3362 }
6db4063c
AD		 3363}
3364
3e795de7
AD		 3365/**
3366 * con_is_bound - checks if driver is bound to the console
3367 * @csw: console driver
3368 *
3369 * RETURNS: zero if unbound, nonzero if bound
3370 *
3371 * Drivers can call this and if zero, they should release
3372 * all resources allocated on con_startup()
3373 */
3374int con_is_bound(const struct consw *csw)
3375{
3376 int i, bound = 0;
3377
3378 for (i = 0; i < MAX_NR_CONSOLES; i++) {
3379 if (con_driver_map[i] == csw) {
3380 bound = 1;
3381 break;
3382 }
3383 }
3384
3385 return bound;
3386}
3387EXPORT_SYMBOL(con_is_bound);
3388
b45cfba4
JB		 3389/**
3390 * con_debug_enter - prepare the console for the kernel debugger
3391 * @sw: console driver
3392 *
3393 * Called when the console is taken over by the kernel debugger, this
3394 * function needs to save the current console state, then put the console
3395 * into a state suitable for the kernel debugger.
3396 *
3397 * RETURNS:
3398 * Zero on success, nonzero if a failure occurred when trying to prepare
3399 * the console for the debugger.
3400 */
3401int con_debug_enter(struct vc_data *vc)
3402{
3403 int ret = 0;
3404
3405 saved_fg_console = fg_console;
3406 saved_last_console = last_console;
3407 saved_want_console = want_console;
3408 saved_vc_mode = vc->vc_mode;
beed5336 3409 saved_console_blanked = console_blanked;
b45cfba4
JB		 3410 vc->vc_mode = KD_TEXT;
3411 console_blanked = 0;
3412 if (vc->vc_sw->con_debug_enter)
3413 ret = vc->vc_sw->con_debug_enter(vc);
81d44507
JW		 3414#ifdef CONFIG_KGDB_KDB
3415 /* Set the initial LINES variable if it is not already set */
3416 if (vc->vc_rows < 999) {
3417 int linecount;
3418 char lns[4];
3419 const char *setargs[3] = {
3420 "set",
3421 "LINES",
3422 lns,
3423 };
3424 if (kdbgetintenv(setargs[0], &linecount)) {
3425 snprintf(lns, 4, "%i", vc->vc_rows);
3426 kdb_set(2, setargs);
3427 }
3428 }
17b572e8
JW		 3429 if (vc->vc_cols < 999) {
3430 int colcount;
3431 char cols[4];
3432 const char *setargs[3] = {
3433 "set",
3434 "COLUMNS",
3435 cols,
3436 };
3437 if (kdbgetintenv(setargs[0], &colcount)) {
3438 snprintf(cols, 4, "%i", vc->vc_cols);
3439 kdb_set(2, setargs);
3440 }
3441 }
81d44507 3442#endif /* CONFIG_KGDB_KDB */
b45cfba4
JB		 3443 return ret;
3444}
3445EXPORT_SYMBOL_GPL(con_debug_enter);
3446
3447/**
3448 * con_debug_leave - restore console state
3449 * @sw: console driver
3450 *
3451 * Restore the console state to what it was before the kernel debugger
3452 * was invoked.
3453 *
3454 * RETURNS:
3455 * Zero on success, nonzero if a failure occurred when trying to restore
3456 * the console.
3457 */
3458int con_debug_leave(void)
3459{
3460 struct vc_data *vc;
3461 int ret = 0;
3462
3463 fg_console = saved_fg_console;
3464 last_console = saved_last_console;
3465 want_console = saved_want_console;
beed5336 3466 console_blanked = saved_console_blanked;
b45cfba4
JB		 3467 vc_cons[fg_console].d->vc_mode = saved_vc_mode;
3468
3469 vc = vc_cons[fg_console].d;
3470 if (vc->vc_sw->con_debug_leave)
3471 ret = vc->vc_sw->con_debug_leave(vc);
3472 return ret;
3473}
3474EXPORT_SYMBOL_GPL(con_debug_leave);
3475
50e244cc 3476static int do_register_con_driver(const struct consw *csw, int first, int last)
3e795de7
AD		 3477{
3478 struct module *owner = csw->owner;
3479 struct con_driver *con_driver;
3480 const char *desc;
3481 int i, retval = 0;
3482
50e244cc
AC		 3483 WARN_CONSOLE_UNLOCKED();
3484
3e795de7
AD		 3485 if (!try_module_get(owner))
3486 return -ENODEV;
3487
3e795de7
AD		 3488 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3489 con_driver = &registered_con_driver[i];
3490
3491 /* already registered */
3492 if (con_driver->con == csw)
c55c63c6 3493 retval = -EBUSY;
3e795de7
AD		 3494 }
3495
3496 if (retval)
3497 goto err;
3498
3499 desc = csw->con_startup();
3500
3501 if (!desc)
3502 goto err;
3503
3504 retval = -EINVAL;
3505
3506 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3507 con_driver = &registered_con_driver[i];
3508
3509 if (con_driver->con == NULL) {
3510 con_driver->con = csw;
3511 con_driver->desc = desc;
6db4063c
AD		 3512 con_driver->node = i;
3513 con_driver->flag = CON_DRIVER_FLAG_MODULE |
3e795de7
AD		 3514 CON_DRIVER_FLAG_INIT;
3515 con_driver->first = first;
3516 con_driver->last = last;
3517 retval = 0;
3518 break;
3519 }
3520 }
3521
6db4063c
AD		 3522 if (retval)
3523 goto err;
3524
d81ed103 3525 con_driver->dev = device_create(vtconsole_class, NULL,
47aa5793
GKH		 3526 MKDEV(0, con_driver->node),
3527 NULL, "vtcon%i",
3528 con_driver->node);
6db4063c 3529
805952a8
GKH		 3530 if (IS_ERR(con_driver->dev)) {
3531 printk(KERN_WARNING "Unable to create device for %s; "
6db4063c 3532 "errno = %ld\n", con_driver->desc,
805952a8
GKH		 3533 PTR_ERR(con_driver->dev));
3534 con_driver->dev = NULL;
6db4063c 3535 } else {
805952a8 3536 vtconsole_init_device(con_driver);
6db4063c 3537 }
928e964f 3538
3e795de7 3539err:
3e795de7
AD		 3540 module_put(owner);
3541 return retval;
3542}
50e244cc 3543
3e795de7
AD		 3544
3545/**
50539dd4 3546 * do_unregister_con_driver - unregister console driver from console layer
3e795de7
AD		 3547 * @csw: console driver
3548 *
3549 * DESCRIPTION: All drivers that registers to the console layer must
3550 * call this function upon exit, or if the console driver is in a state
3551 * where it won't be able to handle console services, such as the
3552 * framebuffer console without loaded framebuffer drivers.
3553 *
3554 * The driver must unbind first prior to unregistration.
3555 */
e93a9a86
TI		 3556int do_unregister_con_driver(const struct consw *csw)
3557{
3558 int i, retval = -ENODEV;
3e795de7
AD		 3559
3560 /* cannot unregister a bound driver */
3561 if (con_is_bound(csw))
3562 goto err;
3563
3564 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3565 struct con_driver *con_driver = &registered_con_driver[i];
3566
3567 if (con_driver->con == csw &&
6db4063c 3568 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
805952a8
GKH		 3569 vtconsole_deinit_device(con_driver);
3570 device_destroy(vtconsole_class,
3571 MKDEV(0, con_driver->node));
3e795de7
AD		 3572 con_driver->con = NULL;
3573 con_driver->desc = NULL;
805952a8 3574 con_driver->dev = NULL;
6db4063c 3575 con_driver->node = 0;
3e795de7
AD		 3576 con_driver->flag = 0;
3577 con_driver->first = 0;
3578 con_driver->last = 0;
3579 retval = 0;
3580 break;
3581 }
3582 }
3e795de7 3583err:
3e795de7
AD		 3584 return retval;
3585}
e93a9a86 3586EXPORT_SYMBOL_GPL(do_unregister_con_driver);
3e795de7
AD		 3587
3588/*
3589 * If we support more console drivers, this function is used
3590 * when a driver wants to take over some existing consoles
3591 * and become default driver for newly opened ones.
3592 *
155957f5 3593 * do_take_over_console is basically a register followed by unbind
50e244cc
AC		 3594 */
3595int do_take_over_console(const struct consw *csw, int first, int last, int deflt)
3596{
3597 int err;
3598
3599 err = do_register_con_driver(csw, first, last);
3600 /*
3601 * If we get an busy error we still want to bind the console driver
3602 * and return success, as we may have unbound the console driver
3603 * but not unregistered it.
3604 */
3605 if (err == -EBUSY)
3606 err = 0;
3607 if (!err)
3608 do_bind_con_driver(csw, first, last, deflt);
3609
3610 return err;
3611}
3612EXPORT_SYMBOL_GPL(do_take_over_console);
3613
3e795de7
AD		 3614
3615/*
3616 * give_up_console is a wrapper to unregister_con_driver. It will only
3617 * work if driver is fully unbound.
3618 */
3619void give_up_console(const struct consw *csw)
3620{
70125e76
WY		 3621 console_lock();
3622 do_unregister_con_driver(csw);
3623 console_unlock();
3e795de7
AD		 3624}
3625
6db4063c 3626static int __init vtconsole_class_init(void)
3e795de7 3627{
6db4063c 3628 int i;
3e795de7 3629
6db4063c
AD		 3630 vtconsole_class = class_create(THIS_MODULE, "vtconsole");
3631 if (IS_ERR(vtconsole_class)) {
3632 printk(KERN_WARNING "Unable to create vt console class; "
3633 "errno = %ld\n", PTR_ERR(vtconsole_class));
3634 vtconsole_class = NULL;
3635 }
3e795de7 3636
6db4063c 3637 /* Add system drivers to sysfs */
3e795de7
AD		 3638 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3639 struct con_driver *con = &registered_con_driver[i];
3640
805952a8 3641 if (con->con && !con->dev) {
d81ed103 3642 con->dev = device_create(vtconsole_class, NULL,
47aa5793
GKH		 3643 MKDEV(0, con->node),
3644 NULL, "vtcon%i",
3645 con->node);
6db4063c 3646
805952a8 3647 if (IS_ERR(con->dev)) {
6db4063c 3648 printk(KERN_WARNING "Unable to create "
805952a8
GKH		 3649 "device for %s; errno = %ld\n",
3650 con->desc, PTR_ERR(con->dev));
3651 con->dev = NULL;
6db4063c 3652 } else {
805952a8 3653 vtconsole_init_device(con);
6db4063c 3654 }
3e795de7 3655 }
3e795de7
AD		 3656 }
3657
3e795de7
AD		 3658 return 0;
3659}
6db4063c 3660postcore_initcall(vtconsole_class_init);
3e795de7 3661
1da177e4
LT		 3662#endif
3663
3664/*
3665 * Screen blanking
3666 */
3667
403aac96 3668static int set_vesa_blanking(char __user *p)
1da177e4 3669{
403aac96
YY		 3670 unsigned int mode;
3671
3672 if (get_user(mode, p + 1))
3673 return -EFAULT;
3674
3675 vesa_blank_mode = (mode < 4) ? mode : 0;
3676 return 0;
1da177e4
LT		 3677}
3678
1da177e4
LT		 3679void do_blank_screen(int entering_gfx)
3680{
3681 struct vc_data *vc = vc_cons[fg_console].d;
3682 int i;
3683
3684 WARN_CONSOLE_UNLOCKED();
3685
3686 if (console_blanked) {
3687 if (blank_state == blank_vesa_wait) {
3688 blank_state = blank_off;
d060a321 3689 vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0);
1da177e4
LT		 3690 }
3691 return;
3692 }
1da177e4
LT		 3693
3694 /* entering graphics mode? */
3695 if (entering_gfx) {
3696 hide_cursor(vc);
3697 save_screen(vc);
3698 vc->vc_sw->con_blank(vc, -1, 1);
3699 console_blanked = fg_console + 1;
b6e8f00f 3700 blank_state = blank_off;
1da177e4
LT		 3701 set_origin(vc);
3702 return;
3703 }
3704
b6e8f00f 3705 if (blank_state != blank_normal_wait)
3706 return;
3707 blank_state = blank_off;
3708
1da177e4
LT		 3709 /* don't blank graphics */
3710 if (vc->vc_mode != KD_TEXT) {
3711 console_blanked = fg_console + 1;
3712 return;
3713 }
3714
3715 hide_cursor(vc);
3716 del_timer_sync(&console_timer);
3717 blank_timer_expired = 0;
3718
3719 save_screen(vc);
3720 /* In case we need to reset origin, blanking hook returns 1 */
d060a321 3721 i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0);
1da177e4
LT		 3722 console_blanked = fg_console + 1;
3723 if (i)
3724 set_origin(vc);
3725
3726 if (console_blank_hook && console_blank_hook(1))
3727 return;
3728
d060a321 3729 if (vesa_off_interval && vesa_blank_mode) {
030babac 3730 blank_state = blank_vesa_wait;
1da177e4
LT		 3731 mod_timer(&console_timer, jiffies + vesa_off_interval);
3732 }
8b92e87d 3733 vt_event_post(VT_EVENT_BLANK, vc->vc_num, vc->vc_num);
1da177e4
LT		 3734}
3735EXPORT_SYMBOL(do_blank_screen);
3736
3737/*
3738 * Called by timer as well as from vt_console_driver
3739 */
3740void do_unblank_screen(int leaving_gfx)
3741{
3742 struct vc_data *vc;
3743
3744 /* This should now always be called from a "sane" (read: can schedule)
3745 * context for the sake of the low level drivers, except in the special
3746 * case of oops_in_progress
3747 */
3748 if (!oops_in_progress)
3749 might_sleep();
3750
3751 WARN_CONSOLE_UNLOCKED();
3752
3753 ignore_poke = 0;
3754 if (!console_blanked)
3755 return;
3756 if (!vc_cons_allocated(fg_console)) {
3757 /* impossible */
1ffdda95
MSB		 3758 pr_warning("unblank_screen: tty %d not allocated ??\n",
3759 fg_console+1);
1da177e4
LT		 3760 return;
3761 }
3762 vc = vc_cons[fg_console].d;
8fd4bd22
JB		 3763 /* Try to unblank in oops case too */
3764 if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc))
1da177e4
LT		 3765 return; /* but leave console_blanked != 0 */
3766
3767 if (blankinterval) {
f324edc8 3768 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
1da177e4
LT		 3769 blank_state = blank_normal_wait;
3770 }
3771
3772 console_blanked = 0;
8fd4bd22 3773 if (vc->vc_sw->con_blank(vc, 0, leaving_gfx) || vt_force_oops_output(vc))
1da177e4
LT		 3774 /* Low-level driver cannot restore -> do it ourselves */
3775 update_screen(vc);
3776 if (console_blank_hook)
3777 console_blank_hook(0);
3778 set_palette(vc);
3779 set_cursor(vc);
8b92e87d 3780 vt_event_post(VT_EVENT_UNBLANK, vc->vc_num, vc->vc_num);
1da177e4
LT		 3781}
3782EXPORT_SYMBOL(do_unblank_screen);
3783
3784/*
3785 * This is called by the outside world to cause a forced unblank, mostly for
3786 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
3787 * call it with 1 as an argument and so force a mode restore... that may kill
3788 * X or at least garbage the screen but would also make the Oops visible...
3789 */
3790void unblank_screen(void)
3791{
3792 do_unblank_screen(0);
3793}
3794
3795/*
70522e12 3796 * We defer the timer blanking to work queue so it can take the console mutex
1da177e4 3797 * (console operations can still happen at irq time, but only from printk which
70522e12 3798 * has the console mutex. Not perfect yet, but better than no locking
1da177e4
LT		 3799 */
3800static void blank_screen_t(unsigned long dummy)
3801{
cc63b1e1 3802 if (unlikely(!keventd_up())) {
f324edc8 3803 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
cc63b1e1
JB		 3804 return;
3805 }
1da177e4
LT		 3806 blank_timer_expired = 1;
3807 schedule_work(&console_work);
3808}
3809
3810void poke_blanked_console(void)
3811{
3812 WARN_CONSOLE_UNLOCKED();
3813
3814 /* Add this so we quickly catch whoever might call us in a non
3815 * safe context. Nowadays, unblank_screen() isn't to be called in
3816 * atomic contexts and is allowed to schedule (with the special case
3817 * of oops_in_progress, but that isn't of any concern for this
3818 * function. --BenH.
3819 */
3820 might_sleep();
3821
3822 /* This isn't perfectly race free, but a race here would be mostly harmless,
3823 * at worse, we'll do a spurrious blank and it's unlikely
3824 */
3825 del_timer(&console_timer);
3826 blank_timer_expired = 0;
3827
3828 if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS)
3829 return;
3830 if (console_blanked)
3831 unblank_screen();
3832 else if (blankinterval) {
f324edc8 3833 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
1da177e4
LT		 3834 blank_state = blank_normal_wait;
3835 }
3836}
3837
3838/*
3839 * Palettes
3840 */
3841
3842static void set_palette(struct vc_data *vc)
3843{
3844 WARN_CONSOLE_UNLOCKED();
3845
3846 if (vc->vc_mode != KD_GRAPHICS)
3847 vc->vc_sw->con_set_palette(vc, color_table);
3848}
3849
1da177e4
LT		 3850/*
3851 * Load palette into the DAC registers. arg points to a colour
3852 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
3853 */
3854
3855int con_set_cmap(unsigned char __user *arg)
3856{
871bdea6
MG		 3857 int i, j, k;
3858 unsigned char colormap[3*16];
3859
3860 if (copy_from_user(colormap, arg, sizeof(colormap)))
3861 return -EFAULT;
1da177e4 3862
ac751efa 3863 console_lock();
871bdea6
MG		 3864 for (i = k = 0; i < 16; i++) {
3865 default_red[i] = colormap[k++];
3866 default_grn[i] = colormap[k++];
3867 default_blu[i] = colormap[k++];
3868 }
3869 for (i = 0; i < MAX_NR_CONSOLES; i++) {
3870 if (!vc_cons_allocated(i))
3871 continue;
3872 for (j = k = 0; j < 16; j++) {
3873 vc_cons[i].d->vc_palette[k++] = default_red[j];
3874 vc_cons[i].d->vc_palette[k++] = default_grn[j];
3875 vc_cons[i].d->vc_palette[k++] = default_blu[j];
3876 }
3877 set_palette(vc_cons[i].d);
3878 }
ac751efa 3879 console_unlock();
1da177e4 3880
871bdea6 3881 return 0;
1da177e4
LT		 3882}
3883
3884int con_get_cmap(unsigned char __user *arg)
3885{
871bdea6
MG		 3886 int i, k;
3887 unsigned char colormap[3*16];
1da177e4 3888
ac751efa 3889 console_lock();
871bdea6
MG		 3890 for (i = k = 0; i < 16; i++) {
3891 colormap[k++] = default_red[i];
3892 colormap[k++] = default_grn[i];
3893 colormap[k++] = default_blu[i];
3894 }
ac751efa 3895 console_unlock();
1da177e4 3896
871bdea6
MG		 3897 if (copy_to_user(arg, colormap, sizeof(colormap)))
3898 return -EFAULT;
3899
3900 return 0;
1da177e4
LT		 3901}
3902
3903void reset_palette(struct vc_data *vc)
3904{
3905 int j, k;
3906 for (j=k=0; j<16; j++) {
3907 vc->vc_palette[k++] = default_red[j];
3908 vc->vc_palette[k++] = default_grn[j];
3909 vc->vc_palette[k++] = default_blu[j];
3910 }
3911 set_palette(vc);
3912}
3913
3914/*
3915 * Font switching
3916 *
3917 * Currently we only support fonts up to 32 pixels wide, at a maximum height
3918 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
3919 * depending on width) reserved for each character which is kinda wasty, but
3920 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
25985edc 3921 * is up to the actual low-level console-driver convert data into its favorite
1da177e4
LT		 3922 * format (maybe we should add a `fontoffset' field to the `display'
3923 * structure so we won't have to convert the fontdata all the time.
3924 * /Jes
3925 */
3926
3927#define max_font_size 65536
3928
3929static int con_font_get(struct vc_data *vc, struct console_font_op *op)
3930{
3931 struct console_font font;
3932 int rc = -EINVAL;
3933 int c;
3934
1da177e4
LT		 3935 if (op->data) {
3936 font.data = kmalloc(max_font_size, GFP_KERNEL);
3937 if (!font.data)
3938 return -ENOMEM;
3939 } else
3940 font.data = NULL;
3941
ac751efa 3942 console_lock();
edab558f
AC		 3943 if (vc->vc_mode != KD_TEXT)
3944 rc = -EINVAL;
3945 else if (vc->vc_sw->con_font_get)
1da177e4
LT		 3946 rc = vc->vc_sw->con_font_get(vc, &font);
3947 else
3948 rc = -ENOSYS;
ac751efa 3949 console_unlock();
1da177e4
LT		 3950
3951 if (rc)
3952 goto out;
3953
3954 c = (font.width+7)/8 * 32 * font.charcount;
04f378b1 3955
1da177e4
LT		 3956 if (op->data && font.charcount > op->charcount)
3957 rc = -ENOSPC;
3958 if (!(op->flags & KD_FONT_FLAG_OLD)) {
3959 if (font.width > op->width || font.height > op->height)
3960 rc = -ENOSPC;
3961 } else {
3962 if (font.width != 8)
3963 rc = -EIO;
3964 else if ((op->height && font.height > op->height) ||
3965 font.height > 32)
3966 rc = -ENOSPC;
3967 }
3968 if (rc)
3969 goto out;
3970
3971 op->height = font.height;
3972 op->width = font.width;
3973 op->charcount = font.charcount;
3974
3975 if (op->data && copy_to_user(op->data, font.data, c))
3976 rc = -EFAULT;
3977
3978out:
3979 kfree(font.data);
3980 return rc;
3981}
3982
3983static int con_font_set(struct vc_data *vc, struct console_font_op *op)
3984{
3985 struct console_font font;
3986 int rc = -EINVAL;
3987 int size;
3988
3989 if (vc->vc_mode != KD_TEXT)
3990 return -EINVAL;
3991 if (!op->data)
3992 return -EINVAL;
3993 if (op->charcount > 512)
3994 return -EINVAL;
3995 if (!op->height) { /* Need to guess font height [compat] */
3996 int h, i;
3997 u8 __user *charmap = op->data;
3998 u8 tmp;
3999
4000 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
4001 so that we can get rid of this soon */
4002 if (!(op->flags & KD_FONT_FLAG_OLD))
4003 return -EINVAL;
4004 for (h = 32; h > 0; h--)
4005 for (i = 0; i < op->charcount; i++) {
4006 if (get_user(tmp, &charmap[32*i+h-1]))
4007 return -EFAULT;
4008 if (tmp)
4009 goto nonzero;
4010 }
4011 return -EINVAL;
4012 nonzero:
4013 op->height = h;
4014 }
4015 if (op->width <= 0 || op->width > 32 || op->height > 32)
4016 return -EINVAL;
4017 size = (op->width+7)/8 * 32 * op->charcount;
4018 if (size > max_font_size)
4019 return -ENOSPC;
4020 font.charcount = op->charcount;
4021 font.height = op->height;
4022 font.width = op->width;
9b71ca20
JL		 4023 font.data = memdup_user(op->data, size);
4024 if (IS_ERR(font.data))
4025 return PTR_ERR(font.data);
ac751efa 4026 console_lock();
edab558f
AC		 4027 if (vc->vc_mode != KD_TEXT)
4028 rc = -EINVAL;
4029 else if (vc->vc_sw->con_font_set)
1da177e4
LT		 4030 rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
4031 else
4032 rc = -ENOSYS;
ac751efa 4033 console_unlock();
1da177e4
LT		 4034 kfree(font.data);
4035 return rc;
4036}
4037
4038static int con_font_default(struct vc_data *vc, struct console_font_op *op)
4039{
4040 struct console_font font = {.width = op->width, .height = op->height};
4041 char name[MAX_FONT_NAME];
4042 char *s = name;
4043 int rc;
4044
1da177e4
LT		 4045
4046 if (!op->data)
4047 s = NULL;
4048 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0)
4049 return -EFAULT;
4050 else
4051 name[MAX_FONT_NAME - 1] = 0;
4052
ac751efa 4053 console_lock();
edab558f
AC		 4054 if (vc->vc_mode != KD_TEXT) {
4055 console_unlock();
4056 return -EINVAL;
4057 }
1da177e4
LT		 4058 if (vc->vc_sw->con_font_default)
4059 rc = vc->vc_sw->con_font_default(vc, &font, s);
4060 else
4061 rc = -ENOSYS;
ac751efa 4062 console_unlock();
1da177e4
LT		 4063 if (!rc) {
4064 op->width = font.width;
4065 op->height = font.height;
4066 }
4067 return rc;
4068}
4069
4070static int con_font_copy(struct vc_data *vc, struct console_font_op *op)
4071{
4072 int con = op->height;
4073 int rc;
4074
1da177e4 4075
ac751efa 4076 console_lock();
edab558f
AC		 4077 if (vc->vc_mode != KD_TEXT)
4078 rc = -EINVAL;
4079 else if (!vc->vc_sw->con_font_copy)
1da177e4
LT		 4080 rc = -ENOSYS;
4081 else if (con < 0 || !vc_cons_allocated(con))
4082 rc = -ENOTTY;
4083 else if (con == vc->vc_num) /* nothing to do */
4084 rc = 0;
4085 else
4086 rc = vc->vc_sw->con_font_copy(vc, con);
ac751efa 4087 console_unlock();
1da177e4
LT		 4088 return rc;
4089}
4090
4091int con_font_op(struct vc_data *vc, struct console_font_op *op)
4092{
4093 switch (op->op) {
4094 case KD_FONT_OP_SET:
4095 return con_font_set(vc, op);
4096 case KD_FONT_OP_GET:
4097 return con_font_get(vc, op);
4098 case KD_FONT_OP_SET_DEFAULT:
4099 return con_font_default(vc, op);
4100 case KD_FONT_OP_COPY:
4101 return con_font_copy(vc, op);
4102 }
4103 return -ENOSYS;
4104}
4105
4106/*
4107 * Interface exported to selection and vcs.
4108 */
4109
4110/* used by selection */
4111u16 screen_glyph(struct vc_data *vc, int offset)
4112{
4113 u16 w = scr_readw(screenpos(vc, offset, 1));
4114 u16 c = w & 0xff;
4115
4116 if (w & vc->vc_hi_font_mask)
4117 c |= 0x100;
4118 return c;
4119}
f7511d5f 4120EXPORT_SYMBOL_GPL(screen_glyph);
1da177e4
LT		 4121
4122/* used by vcs - note the word offset */
4123unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed)
4124{
4125 return screenpos(vc, 2 * w_offset, viewed);
4126}
4127
4128void getconsxy(struct vc_data *vc, unsigned char *p)
4129{
4130 p[0] = vc->vc_x;
4131 p[1] = vc->vc_y;
4132}
4133
4134void putconsxy(struct vc_data *vc, unsigned char *p)
4135{
9477e260 4136 hide_cursor(vc);
1da177e4
LT		 4137 gotoxy(vc, p[0], p[1]);
4138 set_cursor(vc);
4139}
4140
4141u16 vcs_scr_readw(struct vc_data *vc, const u16 *org)
4142{
4143 if ((unsigned long)org == vc->vc_pos && softcursor_original != -1)
4144 return softcursor_original;
4145 return scr_readw(org);
4146}
4147
4148void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org)
4149{
4150 scr_writew(val, org);
4151 if ((unsigned long)org == vc->vc_pos) {
4152 softcursor_original = -1;
4153 add_softcursor(vc);
4154 }
4155}
4156
432c9ed2
NP		 4157void vcs_scr_updated(struct vc_data *vc)
4158{
4159 notify_update(vc);
4160}
4161
1da177e4
LT		 4162/*
4163 * Visible symbols for modules
4164 */
4165
4166EXPORT_SYMBOL(color_table);
4167EXPORT_SYMBOL(default_red);
4168EXPORT_SYMBOL(default_grn);
4169EXPORT_SYMBOL(default_blu);
4170EXPORT_SYMBOL(update_region);
4171EXPORT_SYMBOL(redraw_screen);
4172EXPORT_SYMBOL(vc_resize);
4173EXPORT_SYMBOL(fg_console);
4174EXPORT_SYMBOL(console_blank_hook);
4175EXPORT_SYMBOL(console_blanked);
4176EXPORT_SYMBOL(vc_cons);
f6c06b68 4177EXPORT_SYMBOL(global_cursor_default);
1da177e4 4178#ifndef VT_SINGLE_DRIVER
1da177e4
LT		 4179EXPORT_SYMBOL(give_up_console);
4180#endif
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