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drivers/char/vt.c: fix vc->vc_origin on take_over_console()
[deliverable/linux.git] / drivers / char / vt.c
CommitLineData
1da177e4
LT		 1/*
2 * linux/drivers/char/vt.c
3 *
4 * Copyright (C) 1991, 1992 Linus Torvalds
5 */
6
7/*
8 * Hopefully this will be a rather complete VT102 implementation.
9 *
10 * Beeping thanks to John T Kohl.
11 *
12 * Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics
13 * Chars, and VT100 enhancements by Peter MacDonald.
14 *
15 * Copy and paste function by Andrew Haylett,
16 * some enhancements by Alessandro Rubini.
17 *
18 * Code to check for different video-cards mostly by Galen Hunt,
19 * <g-hunt@ee.utah.edu>
20 *
21 * Rudimentary ISO 10646/Unicode/UTF-8 character set support by
22 * Markus Kuhn, <mskuhn@immd4.informatik.uni-erlangen.de>.
23 *
24 * Dynamic allocation of consoles, aeb@cwi.nl, May 1994
25 * Resizing of consoles, aeb, 940926
26 *
27 * Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94
28 * <poe@daimi.aau.dk>
29 *
30 * User-defined bell sound, new setterm control sequences and printk
31 * redirection by Martin Mares <mj@k332.feld.cvut.cz> 19-Nov-95
32 *
33 * APM screenblank bug fixed Takashi Manabe <manabe@roy.dsl.tutics.tut.jp>
34 *
35 * Merge with the abstract console driver by Geert Uytterhoeven
36 * <geert@linux-m68k.org>, Jan 1997.
37 *
38 * Original m68k console driver modifications by
39 *
40 * - Arno Griffioen <arno@usn.nl>
41 * - David Carter <carter@cs.bris.ac.uk>
42 *
43 * The abstract console driver provides a generic interface for a text
44 * console. It supports VGA text mode, frame buffer based graphical consoles
45 * and special graphics processors that are only accessible through some
46 * registers (e.g. a TMS340x0 GSP).
47 *
48 * The interface to the hardware is specified using a special structure
49 * (struct consw) which contains function pointers to console operations
50 * (see <linux/console.h> for more information).
51 *
52 * Support for changeable cursor shape
53 * by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997
54 *
55 * Ported to i386 and con_scrolldelta fixed
56 * by Emmanuel Marty <core@ggi-project.org>, April 1998
57 *
58 * Resurrected character buffers in videoram plus lots of other trickery
59 * by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998
60 *
61 * Removed old-style timers, introduced console_timer, made timer
e1f8e874 62 * deletion SMP-safe. 17Jun00, Andrew Morton
1da177e4
LT		 63 *
64 * Removed console_lock, enabled interrupts across all console operations
65 * 13 March 2001, Andrew Morton
d4328b40
AT		 66 *
67 * Fixed UTF-8 mode so alternate charset modes always work according
68 * to control sequences interpreted in do_con_trol function
69 * preserving backward VT100 semigraphics compatibility,
70 * malformed UTF sequences represented as sequences of replacement glyphs,
71 * original codes or '?' as a last resort if replacement glyph is undefined
72 * by Adam Tla/lka <atlka@pg.gda.pl>, Aug 2006
1da177e4
LT		 73 */
74
75#include <linux/module.h>
76#include <linux/types.h>
77#include <linux/sched.h>
78#include <linux/tty.h>
79#include <linux/tty_flip.h>
80#include <linux/kernel.h>
81#include <linux/string.h>
82#include <linux/errno.h>
83#include <linux/kd.h>
84#include <linux/slab.h>
85#include <linux/major.h>
86#include <linux/mm.h>
87#include <linux/console.h>
88#include <linux/init.h>
c831c338 89#include <linux/mutex.h>
1da177e4
LT		 90#include <linux/vt_kern.h>
91#include <linux/selection.h>
405f5571 92#include <linux/smp_lock.h>
1da177e4
LT		 93#include <linux/tiocl.h>
94#include <linux/kbd_kern.h>
95#include <linux/consolemap.h>
96#include <linux/timer.h>
97#include <linux/interrupt.h>
1da177e4 98#include <linux/workqueue.h>
1da177e4
LT		 99#include <linux/pm.h>
100#include <linux/font.h>
101#include <linux/bitops.h>
b293d758 102#include <linux/notifier.h>
d81ed103
AC		 103#include <linux/device.h>
104#include <linux/io.h>
1da177e4 105#include <asm/system.h>
d81ed103 106#include <linux/uaccess.h>
81d44507 107#include <linux/kdb.h>
1da177e4 108
3e795de7 109#define MAX_NR_CON_DRIVER 16
1da177e4 110
6db4063c 111#define CON_DRIVER_FLAG_MODULE 1
928e964f
AD		 112#define CON_DRIVER_FLAG_INIT 2
113#define CON_DRIVER_FLAG_ATTR 4
3e795de7
AD		 114
115struct con_driver {
116 const struct consw *con;
117 const char *desc;
805952a8 118 struct device *dev;
6db4063c 119 int node;
3e795de7
AD		 120 int first;
121 int last;
122 int flag;
123};
124
125static struct con_driver registered_con_driver[MAX_NR_CON_DRIVER];
1da177e4
LT		 126const struct consw *conswitchp;
127
128/* A bitmap for codes <32. A bit of 1 indicates that the code
129 * corresponding to that bit number invokes some special action
130 * (such as cursor movement) and should not be displayed as a
131 * glyph unless the disp_ctrl mode is explicitly enabled.
132 */
133#define CTRL_ACTION 0x0d00ff81
134#define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */
135
136/*
137 * Here is the default bell parameters: 750HZ, 1/8th of a second
138 */
139#define DEFAULT_BELL_PITCH 750
140#define DEFAULT_BELL_DURATION (HZ/8)
141
1da177e4
LT		 142struct vc vc_cons [MAX_NR_CONSOLES];
143
144#ifndef VT_SINGLE_DRIVER
145static const struct consw *con_driver_map[MAX_NR_CONSOLES];
146#endif
147
148static int con_open(struct tty_struct *, struct file *);
149static void vc_init(struct vc_data *vc, unsigned int rows,
150 unsigned int cols, int do_clear);
151static void gotoxy(struct vc_data *vc, int new_x, int new_y);
152static void save_cur(struct vc_data *vc);
153static void reset_terminal(struct vc_data *vc, int do_clear);
154static void con_flush_chars(struct tty_struct *tty);
403aac96 155static int set_vesa_blanking(char __user *p);
1da177e4
LT		 156static void set_cursor(struct vc_data *vc);
157static void hide_cursor(struct vc_data *vc);
65f27f38 158static void console_callback(struct work_struct *ignored);
1da177e4
LT		 159static void blank_screen_t(unsigned long dummy);
160static void set_palette(struct vc_data *vc);
161
162static int printable; /* Is console ready for printing? */
77bf2bab 163int default_utf8 = true;
042f10ec 164module_param(default_utf8, int, S_IRUGO | S_IWUSR);
f6c06b68
MG		 165int global_cursor_default = -1;
166module_param(global_cursor_default, int, S_IRUGO | S_IWUSR);
1da177e4 167
9ea9a886
CL		 168static int cur_default = CUR_DEFAULT;
169module_param(cur_default, int, S_IRUGO | S_IWUSR);
170
1da177e4
LT		 171/*
172 * ignore_poke: don't unblank the screen when things are typed. This is
173 * mainly for the privacy of braille terminal users.
174 */
175static int ignore_poke;
176
177int do_poke_blanked_console;
178int console_blanked;
179
180static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
1da177e4 181static int vesa_off_interval;
f324edc8
DM		 182static int blankinterval = 10*60;
183core_param(consoleblank, blankinterval, int, 0444);
1da177e4 184
65f27f38 185static DECLARE_WORK(console_work, console_callback);
1da177e4
LT		 186
187/*
188 * fg_console is the current virtual console,
189 * last_console is the last used one,
190 * want_console is the console we want to switch to,
b45cfba4 191 * saved_* variants are for save/restore around kernel debugger enter/leave
1da177e4
LT		 192 */
193int fg_console;
194int last_console;
195int want_console = -1;
b45cfba4
JB		 196int saved_fg_console;
197int saved_last_console;
198int saved_want_console;
199int saved_vc_mode;
1da177e4
LT		 200
201/*
202 * For each existing display, we have a pointer to console currently visible
203 * on that display, allowing consoles other than fg_console to be refreshed
204 * appropriately. Unless the low-level driver supplies its own display_fg
205 * variable, we use this one for the "master display".
206 */
207static struct vc_data *master_display_fg;
208
209/*
210 * Unfortunately, we need to delay tty echo when we're currently writing to the
211 * console since the code is (and always was) not re-entrant, so we schedule
212 * all flip requests to process context with schedule-task() and run it from
213 * console_callback().
214 */
215
216/*
217 * For the same reason, we defer scrollback to the console callback.
218 */
219static int scrollback_delta;
220
221/*
222 * Hook so that the power management routines can (un)blank
223 * the console on our behalf.
224 */
225int (*console_blank_hook)(int);
226
40565f19 227static DEFINE_TIMER(console_timer, blank_screen_t, 0, 0);
1da177e4
LT		 228static int blank_state;
229static int blank_timer_expired;
230enum {
231 blank_off = 0,
232 blank_normal_wait,
233 blank_vesa_wait,
234};
235
b293d758
ST		 236/*
237 * Notifier list for console events.
238 */
239static ATOMIC_NOTIFIER_HEAD(vt_notifier_list);
240
241int register_vt_notifier(struct notifier_block *nb)
242{
243 return atomic_notifier_chain_register(&vt_notifier_list, nb);
244}
245EXPORT_SYMBOL_GPL(register_vt_notifier);
246
247int unregister_vt_notifier(struct notifier_block *nb)
248{
249 return atomic_notifier_chain_unregister(&vt_notifier_list, nb);
250}
251EXPORT_SYMBOL_GPL(unregister_vt_notifier);
252
253static void notify_write(struct vc_data *vc, unsigned int unicode)
254{
255 struct vt_notifier_param param = { .vc = vc, unicode = unicode };
256 atomic_notifier_call_chain(&vt_notifier_list, VT_WRITE, &param);
257}
258
259static void notify_update(struct vc_data *vc)
260{
261 struct vt_notifier_param param = { .vc = vc };
262 atomic_notifier_call_chain(&vt_notifier_list, VT_UPDATE, &param);
263}
1da177e4
LT		 264/*
265 * Low-Level Functions
266 */
267
268#define IS_FG(vc) ((vc)->vc_num == fg_console)
269
270#ifdef VT_BUF_VRAM_ONLY
271#define DO_UPDATE(vc) 0
272#else
f700d6e5 273#define DO_UPDATE(vc) (CON_IS_VISIBLE(vc) && !console_blanked)
1da177e4
LT		 274#endif
275
276static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed)
277{
278 unsigned short *p;
279
280 if (!viewed)
281 p = (unsigned short *)(vc->vc_origin + offset);
282 else if (!vc->vc_sw->con_screen_pos)
283 p = (unsigned short *)(vc->vc_visible_origin + offset);
284 else
285 p = vc->vc_sw->con_screen_pos(vc, offset);
286 return p;
287}
288
289static inline void scrolldelta(int lines)
290{
291 scrollback_delta += lines;
292 schedule_console_callback();
293}
294
295void schedule_console_callback(void)
296{
297 schedule_work(&console_work);
298}
299
300static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
301{
302 unsigned short *d, *s;
303
304 if (t+nr >= b)
305 nr = b - t - 1;
306 if (b > vc->vc_rows || t >= b || nr < 1)
307 return;
308 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr))
309 return;
310 d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
311 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr));
312 scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row);
386f40c8 313 scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_video_erase_char,
1da177e4
LT		 314 vc->vc_size_row * nr);
315}
316
317static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
318{
319 unsigned short *s;
320 unsigned int step;
321
322 if (t+nr >= b)
323 nr = b - t - 1;
324 if (b > vc->vc_rows || t >= b || nr < 1)
325 return;
326 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr))
327 return;
328 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
329 step = vc->vc_cols * nr;
330 scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row);
93f78da4 331 scr_memsetw(s, vc->vc_video_erase_char, 2 * step);
1da177e4
LT		 332}
333
334static void do_update_region(struct vc_data *vc, unsigned long start, int count)
335{
336#ifndef VT_BUF_VRAM_ONLY
337 unsigned int xx, yy, offset;
338 u16 *p;
339
340 p = (u16 *) start;
341 if (!vc->vc_sw->con_getxy) {
342 offset = (start - vc->vc_origin) / 2;
343 xx = offset % vc->vc_cols;
344 yy = offset / vc->vc_cols;
345 } else {
346 int nxx, nyy;
347 start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy);
348 xx = nxx; yy = nyy;
349 }
350 for(;;) {
351 u16 attrib = scr_readw(p) & 0xff00;
352 int startx = xx;
353 u16 *q = p;
354 while (xx < vc->vc_cols && count) {
355 if (attrib != (scr_readw(p) & 0xff00)) {
356 if (p > q)
357 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
358 startx = xx;
359 q = p;
360 attrib = scr_readw(p) & 0xff00;
361 }
362 p++;
363 xx++;
364 count--;
365 }
366 if (p > q)
367 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
368 if (!count)
369 break;
370 xx = 0;
371 yy++;
372 if (vc->vc_sw->con_getxy) {
373 p = (u16 *)start;
374 start = vc->vc_sw->con_getxy(vc, start, NULL, NULL);
375 }
376 }
377#endif
378}
379
380void update_region(struct vc_data *vc, unsigned long start, int count)
381{
382 WARN_CONSOLE_UNLOCKED();
383
384 if (DO_UPDATE(vc)) {
385 hide_cursor(vc);
386 do_update_region(vc, start, count);
387 set_cursor(vc);
388 }
389}
390
391/* Structure of attributes is hardware-dependent */
392
fa6ce9ab
JE		 393static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink,
394 u8 _underline, u8 _reverse, u8 _italic)
1da177e4
LT		 395{
396 if (vc->vc_sw->con_build_attr)
fa6ce9ab
JE		 397 return vc->vc_sw->con_build_attr(vc, _color, _intensity,
398 _blink, _underline, _reverse, _italic);
1da177e4
LT		 399
400#ifndef VT_BUF_VRAM_ONLY
401/*
402 * ++roman: I completely changed the attribute format for monochrome
403 * mode (!can_do_color). The formerly used MDA (monochrome display
404 * adapter) format didn't allow the combination of certain effects.
405 * Now the attribute is just a bit vector:
406 * Bit 0..1: intensity (0..2)
407 * Bit 2 : underline
408 * Bit 3 : reverse
409 * Bit 7 : blink
410 */
411 {
c9e587ab 412 u8 a = _color;
1da177e4
LT		 413 if (!vc->vc_can_do_color)
414 return _intensity |
fa6ce9ab 415 (_italic ? 2 : 0) |
1da177e4
LT		 416 (_underline ? 4 : 0) |
417 (_reverse ? 8 : 0) |
418 (_blink ? 0x80 : 0);
fa6ce9ab
JE		 419 if (_italic)
420 a = (a & 0xF0) | vc->vc_itcolor;
421 else if (_underline)
1da177e4
LT		 422 a = (a & 0xf0) | vc->vc_ulcolor;
423 else if (_intensity == 0)
424 a = (a & 0xf0) | vc->vc_ulcolor;
425 if (_reverse)
426 a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77);
427 if (_blink)
428 a ^= 0x80;
429 if (_intensity == 2)
430 a ^= 0x08;
431 if (vc->vc_hi_font_mask == 0x100)
432 a <<= 1;
433 return a;
434 }
435#else
436 return 0;
437#endif
438}
439
440static void update_attr(struct vc_data *vc)
441{
fa6ce9ab
JE		 442 vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity,
443 vc->vc_blink, vc->vc_underline,
444 vc->vc_reverse ^ vc->vc_decscnm, vc->vc_italic);
445 vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm, 0) << 8) | ' ';
1da177e4
LT		 446}
447
448/* Note: inverting the screen twice should revert to the original state */
449void invert_screen(struct vc_data *vc, int offset, int count, int viewed)
450{
451 unsigned short *p;
452
453 WARN_CONSOLE_UNLOCKED();
454
455 count /= 2;
456 p = screenpos(vc, offset, viewed);
457 if (vc->vc_sw->con_invert_region)
458 vc->vc_sw->con_invert_region(vc, p, count);
459#ifndef VT_BUF_VRAM_ONLY
460 else {
461 u16 *q = p;
462 int cnt = count;
463 u16 a;
464
465 if (!vc->vc_can_do_color) {
466 while (cnt--) {
467 a = scr_readw(q);
468 a ^= 0x0800;
469 scr_writew(a, q);
470 q++;
471 }
472 } else if (vc->vc_hi_font_mask == 0x100) {
473 while (cnt--) {
474 a = scr_readw(q);
475 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4);
476 scr_writew(a, q);
477 q++;
478 }
479 } else {
480 while (cnt--) {
481 a = scr_readw(q);
482 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4);
483 scr_writew(a, q);
484 q++;
485 }
486 }
487 }
488#endif
489 if (DO_UPDATE(vc))
490 do_update_region(vc, (unsigned long) p, count);
491}
492
493/* used by selection: complement pointer position */
494void complement_pos(struct vc_data *vc, int offset)
495{
414edcd3 496 static int old_offset = -1;
1da177e4
LT		 497 static unsigned short old;
498 static unsigned short oldx, oldy;
499
500 WARN_CONSOLE_UNLOCKED();
501
414edcd3
AD		 502 if (old_offset != -1 && old_offset >= 0 &&
503 old_offset < vc->vc_screenbuf_size) {
504 scr_writew(old, screenpos(vc, old_offset, 1));
1da177e4
LT		 505 if (DO_UPDATE(vc))
506 vc->vc_sw->con_putc(vc, old, oldy, oldx);
507 }
414edcd3
AD		 508
509 old_offset = offset;
510
511 if (offset != -1 && offset >= 0 &&
512 offset < vc->vc_screenbuf_size) {
1da177e4 513 unsigned short new;
414edcd3 514 unsigned short *p;
1da177e4
LT		 515 p = screenpos(vc, offset, 1);
516 old = scr_readw(p);
517 new = old ^ vc->vc_complement_mask;
518 scr_writew(new, p);
519 if (DO_UPDATE(vc)) {
520 oldx = (offset >> 1) % vc->vc_cols;
521 oldy = (offset >> 1) / vc->vc_cols;
522 vc->vc_sw->con_putc(vc, new, oldy, oldx);
523 }
524 }
414edcd3 525
1da177e4
LT		 526}
527
528static void insert_char(struct vc_data *vc, unsigned int nr)
529{
530 unsigned short *p, *q = (unsigned short *)vc->vc_pos;
531
532 p = q + vc->vc_cols - nr - vc->vc_x;
533 while (--p >= q)
534 scr_writew(scr_readw(p), p + nr);
535 scr_memsetw(q, vc->vc_video_erase_char, nr * 2);
536 vc->vc_need_wrap = 0;
537 if (DO_UPDATE(vc)) {
538 unsigned short oldattr = vc->vc_attr;
539 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x, vc->vc_y, vc->vc_x + nr, 1,
540 vc->vc_cols - vc->vc_x - nr);
541 vc->vc_attr = vc->vc_video_erase_char >> 8;
542 while (nr--)
543 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y, vc->vc_x + nr);
544 vc->vc_attr = oldattr;
545 }
546}
547
548static void delete_char(struct vc_data *vc, unsigned int nr)
549{
550 unsigned int i = vc->vc_x;
551 unsigned short *p = (unsigned short *)vc->vc_pos;
552
553 while (++i <= vc->vc_cols - nr) {
554 scr_writew(scr_readw(p+nr), p);
555 p++;
556 }
557 scr_memsetw(p, vc->vc_video_erase_char, nr * 2);
558 vc->vc_need_wrap = 0;
559 if (DO_UPDATE(vc)) {
560 unsigned short oldattr = vc->vc_attr;
561 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x + nr, vc->vc_y, vc->vc_x, 1,
562 vc->vc_cols - vc->vc_x - nr);
563 vc->vc_attr = vc->vc_video_erase_char >> 8;
564 while (nr--)
565 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y,
566 vc->vc_cols - 1 - nr);
567 vc->vc_attr = oldattr;
568 }
569}
570
571static int softcursor_original;
572
573static void add_softcursor(struct vc_data *vc)
574{
575 int i = scr_readw((u16 *) vc->vc_pos);
576 u32 type = vc->vc_cursor_type;
577
578 if (! (type & 0x10)) return;
579 if (softcursor_original != -1) return;
580 softcursor_original = i;
581 i |= ((type >> 8) & 0xff00 );
582 i ^= ((type) & 0xff00 );
583 if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000;
584 if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700;
585 scr_writew(i, (u16 *) vc->vc_pos);
586 if (DO_UPDATE(vc))
587 vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x);
588}
589
590static void hide_softcursor(struct vc_data *vc)
591{
592 if (softcursor_original != -1) {
593 scr_writew(softcursor_original, (u16 *)vc->vc_pos);
594 if (DO_UPDATE(vc))
595 vc->vc_sw->con_putc(vc, softcursor_original,
596 vc->vc_y, vc->vc_x);
597 softcursor_original = -1;
598 }
599}
600
601static void hide_cursor(struct vc_data *vc)
602{
603 if (vc == sel_cons)
604 clear_selection();
605 vc->vc_sw->con_cursor(vc, CM_ERASE);
606 hide_softcursor(vc);
607}
608
609static void set_cursor(struct vc_data *vc)
610{
611 if (!IS_FG(vc) || console_blanked ||
612 vc->vc_mode == KD_GRAPHICS)
613 return;
614 if (vc->vc_deccm) {
615 if (vc == sel_cons)
616 clear_selection();
617 add_softcursor(vc);
618 if ((vc->vc_cursor_type & 0x0f) != 1)
619 vc->vc_sw->con_cursor(vc, CM_DRAW);
620 } else
621 hide_cursor(vc);
622}
623
624static void set_origin(struct vc_data *vc)
625{
626 WARN_CONSOLE_UNLOCKED();
627
628 if (!CON_IS_VISIBLE(vc) ||
629 !vc->vc_sw->con_set_origin ||
630 !vc->vc_sw->con_set_origin(vc))
631 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
632 vc->vc_visible_origin = vc->vc_origin;
633 vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size;
634 vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x;
635}
636
637static inline void save_screen(struct vc_data *vc)
638{
639 WARN_CONSOLE_UNLOCKED();
640
641 if (vc->vc_sw->con_save_screen)
642 vc->vc_sw->con_save_screen(vc);
643}
644
645/*
646 * Redrawing of screen
647 */
648
649static void clear_buffer_attributes(struct vc_data *vc)
650{
651 unsigned short *p = (unsigned short *)vc->vc_origin;
652 int count = vc->vc_screenbuf_size / 2;
653 int mask = vc->vc_hi_font_mask | 0xff;
654
655 for (; count > 0; count--, p++) {
656 scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p);
657 }
658}
659
660void redraw_screen(struct vc_data *vc, int is_switch)
661{
662 int redraw = 0;
663
664 WARN_CONSOLE_UNLOCKED();
665
666 if (!vc) {
667 /* strange ... */
668 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
669 return;
670 }
671
672 if (is_switch) {
673 struct vc_data *old_vc = vc_cons[fg_console].d;
674 if (old_vc == vc)
675 return;
676 if (!CON_IS_VISIBLE(vc))
677 redraw = 1;
678 *vc->vc_display_fg = vc;
679 fg_console = vc->vc_num;
680 hide_cursor(old_vc);
681 if (!CON_IS_VISIBLE(old_vc)) {
682 save_screen(old_vc);
683 set_origin(old_vc);
684 }
685 } else {
686 hide_cursor(vc);
687 redraw = 1;
688 }
689
690 if (redraw) {
691 int update;
692 int old_was_color = vc->vc_can_do_color;
693
694 set_origin(vc);
695 update = vc->vc_sw->con_switch(vc);
696 set_palette(vc);
697 /*
698 * If console changed from mono<->color, the best we can do
699 * is to clear the buffer attributes. As it currently stands,
700 * rebuilding new attributes from the old buffer is not doable
701 * without overly complex code.
702 */
703 if (old_was_color != vc->vc_can_do_color) {
704 update_attr(vc);
705 clear_buffer_attributes(vc);
706 }
707 if (update && vc->vc_mode != KD_GRAPHICS)
708 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
709 }
710 set_cursor(vc);
711 if (is_switch) {
712 set_leds();
713 compute_shiftstate();
8182ec49 714 notify_update(vc);
1da177e4
LT		 715 }
716}
717
718/*
719 * Allocation, freeing and resizing of VTs.
720 */
721
722int vc_cons_allocated(unsigned int i)
723{
724 return (i < MAX_NR_CONSOLES && vc_cons[i].d);
725}
726
727static void visual_init(struct vc_data *vc, int num, int init)
728{
729 /* ++Geert: vc->vc_sw->con_init determines console size */
730 if (vc->vc_sw)
731 module_put(vc->vc_sw->owner);
732 vc->vc_sw = conswitchp;
733#ifndef VT_SINGLE_DRIVER
734 if (con_driver_map[num])
735 vc->vc_sw = con_driver_map[num];
736#endif
737 __module_get(vc->vc_sw->owner);
738 vc->vc_num = num;
739 vc->vc_display_fg = &master_display_fg;
740 vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir;
741 vc->vc_uni_pagedir = 0;
742 vc->vc_hi_font_mask = 0;
743 vc->vc_complement_mask = 0;
744 vc->vc_can_do_color = 0;
745 vc->vc_sw->con_init(vc, init);
746 if (!vc->vc_complement_mask)
747 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
748 vc->vc_s_complement_mask = vc->vc_complement_mask;
749 vc->vc_size_row = vc->vc_cols << 1;
750 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
751}
752
753int vc_allocate(unsigned int currcons) /* return 0 on success */
754{
755 WARN_CONSOLE_UNLOCKED();
756
757 if (currcons >= MAX_NR_CONSOLES)
758 return -ENXIO;
759 if (!vc_cons[currcons].d) {
760 struct vc_data *vc;
b293d758 761 struct vt_notifier_param param;
1da177e4
LT		 762
763 /* prevent users from taking too much memory */
764 if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE))
765 return -EPERM;
766
767 /* due to the granularity of kmalloc, we waste some memory here */
768 /* the alloc is done in two steps, to optimize the common situation
769 of a 25x80 console (structsize=216, screenbuf_size=4000) */
770 /* although the numbers above are not valid since long ago, the
771 point is still up-to-date and the comment still has its value
772 even if only as a historical artifact. --mj, July 1998 */
b293d758 773 param.vc = vc = kzalloc(sizeof(struct vc_data), GFP_KERNEL);
1da177e4
LT		 774 if (!vc)
775 return -ENOMEM;
1da177e4 776 vc_cons[currcons].d = vc;
c2c88f10 777 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
1da177e4
LT		 778 visual_init(vc, currcons, 1);
779 if (!*vc->vc_uni_pagedir_loc)
780 con_set_default_unimap(vc);
5c9228f0 781 vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL);
1da177e4
LT		 782 if (!vc->vc_screenbuf) {
783 kfree(vc);
784 vc_cons[currcons].d = NULL;
785 return -ENOMEM;
786 }
f6c06b68
MG		 787
788 /* If no drivers have overridden us and the user didn't pass a
789 boot option, default to displaying the cursor */
790 if (global_cursor_default == -1)
791 global_cursor_default = 1;
792
1da177e4 793 vc_init(vc, vc->vc_rows, vc->vc_cols, 1);
4995f8ef 794 vcs_make_sysfs(currcons);
b293d758 795 atomic_notifier_call_chain(&vt_notifier_list, VT_ALLOCATE, &param);
1da177e4
LT		 796 }
797 return 0;
798}
799
e400b6ec
AD		 800static inline int resize_screen(struct vc_data *vc, int width, int height,
801 int user)
1da177e4
LT		 802{
803 /* Resizes the resolution of the display adapater */
804 int err = 0;
805
806 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize)
e400b6ec
AD		 807 err = vc->vc_sw->con_resize(vc, width, height, user);
808
1da177e4
LT		 809 return err;
810}
811
812/*
813 * Change # of rows and columns (0 means unchanged/the size of fg_console)
814 * [this is to be used together with some user program
815 * like resize that changes the hardware videomode]
816 */
817#define VC_RESIZE_MAXCOL (32767)
818#define VC_RESIZE_MAXROW (32767)
8c9a9dd0
AC		 819
820/**
821 * vc_do_resize - resizing method for the tty
822 * @tty: tty being resized
823 * @real_tty: real tty (different to tty if a pty/tty pair)
824 * @vc: virtual console private data
825 * @cols: columns
826 * @lines: lines
827 *
828 * Resize a virtual console, clipping according to the actual constraints.
829 * If the caller passes a tty structure then update the termios winsize
3ad2f3fb 830 * information and perform any necessary signal handling.
8c9a9dd0
AC		 831 *
832 * Caller must hold the console semaphore. Takes the termios mutex and
833 * ctrl_lock of the tty IFF a tty is passed.
834 */
835
fc6f6238
AC		 836static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc,
837 unsigned int cols, unsigned int lines)
1da177e4
LT		 838{
839 unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0;
840 unsigned int old_cols, old_rows, old_row_size, old_screen_size;
841 unsigned int new_cols, new_rows, new_row_size, new_screen_size;
e400b6ec 842 unsigned int end, 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;
869 old_cols = vc->vc_cols;
870 old_row_size = vc->vc_size_row;
871 old_screen_size = vc->vc_screenbuf_size;
872
e400b6ec 873 err = resize_screen(vc, new_cols, new_rows, user);
1da177e4
LT		 874 if (err) {
875 kfree(newscreen);
876 return err;
877 }
878
879 vc->vc_rows = new_rows;
880 vc->vc_cols = new_cols;
881 vc->vc_size_row = new_row_size;
882 vc->vc_screenbuf_size = new_screen_size;
883
884 rlth = min(old_row_size, new_row_size);
885 rrem = new_row_size - rlth;
886 old_origin = vc->vc_origin;
887 new_origin = (long) newscreen;
888 new_scr_end = new_origin + new_screen_size;
3b41dc1a
AD		 889
890 if (vc->vc_y > new_rows) {
891 if (old_rows - vc->vc_y < new_rows) {
892 /*
893 * Cursor near the bottom, copy contents from the
894 * bottom of buffer
895 */
896 old_origin += (old_rows - new_rows) * old_row_size;
897 end = vc->vc_scr_end;
898 } else {
899 /*
900 * Cursor is in no man's land, copy 1/2 screenful
901 * from the top and bottom of cursor position
902 */
903 old_origin += (vc->vc_y - new_rows/2) * old_row_size;
065d9cac 904 end = old_origin + (old_row_size * new_rows);
3b41dc1a
AD		 905 }
906 } else
907 /*
908 * Cursor near the top, copy contents from the top of buffer
909 */
065d9cac
AD		 910 end = (old_rows > new_rows) ? old_origin +
911 (old_row_size * new_rows) :
3b41dc1a 912 vc->vc_scr_end;
1da177e4
LT		 913
914 update_attr(vc);
915
3b41dc1a
AD		 916 while (old_origin < end) {
917 scr_memcpyw((unsigned short *) new_origin,
918 (unsigned short *) old_origin, rlth);
1da177e4 919 if (rrem)
3b41dc1a
AD		 920 scr_memsetw((void *)(new_origin + rlth),
921 vc->vc_video_erase_char, rrem);
1da177e4
LT		 922 old_origin += old_row_size;
923 new_origin += new_row_size;
924 }
925 if (new_scr_end > new_origin)
3b41dc1a
AD		 926 scr_memsetw((void *)new_origin, vc->vc_video_erase_char,
927 new_scr_end - new_origin);
5c9228f0 928 kfree(vc->vc_screenbuf);
1da177e4 929 vc->vc_screenbuf = newscreen;
1da177e4
LT		 930 vc->vc_screenbuf_size = new_screen_size;
931 set_origin(vc);
932
933 /* do part of a reset_terminal() */
934 vc->vc_top = 0;
935 vc->vc_bottom = vc->vc_rows;
936 gotoxy(vc, vc->vc_x, vc->vc_y);
937 save_cur(vc);
938
8c9a9dd0
AC		 939 if (tty) {
940 /* Rewrite the requested winsize data with the actual
941 resulting sizes */
942 struct winsize ws;
1da177e4
LT		 943 memset(&ws, 0, sizeof(ws));
944 ws.ws_row = vc->vc_rows;
945 ws.ws_col = vc->vc_cols;
946 ws.ws_ypixel = vc->vc_scan_lines;
fc6f6238 947 tty_do_resize(tty, &ws);
1da177e4
LT		 948 }
949
950 if (CON_IS_VISIBLE(vc))
951 update_screen(vc);
8b92e87d 952 vt_event_post(VT_EVENT_RESIZE, vc->vc_num, vc->vc_num);
1da177e4
LT		 953 return err;
954}
955
8c9a9dd0
AC		 956/**
957 * vc_resize - resize a VT
958 * @vc: virtual console
959 * @cols: columns
960 * @rows: rows
961 *
962 * Resize a virtual console as seen from the console end of things. We
963 * use the common vc_do_resize methods to update the structures. The
964 * caller must hold the console sem to protect console internals and
965 * vc->vc_tty
966 */
967
968int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int rows)
969{
fc6f6238 970 return vc_do_resize(vc->vc_tty, vc, cols, rows);
8c9a9dd0
AC		 971}
972
973/**
974 * vt_resize - resize a VT
975 * @tty: tty to resize
8c9a9dd0
AC		 976 * @ws: winsize attributes
977 *
978 * Resize a virtual terminal. This is called by the tty layer as we
979 * register our own handler for resizing. The mutual helper does all
980 * the actual work.
981 *
982 * Takes the console sem and the called methods then take the tty
983 * termios_mutex and the tty ctrl_lock in that order.
984 */
da2bdf9a 985static int vt_resize(struct tty_struct *tty, struct winsize *ws)
ca9bda00 986{
8c9a9dd0
AC		 987 struct vc_data *vc = tty->driver_data;
988 int ret;
ca9bda00
AC		 989
990 acquire_console_sem();
fc6f6238 991 ret = vc_do_resize(tty, vc, ws->ws_col, ws->ws_row);
ca9bda00 992 release_console_sem();
8c9a9dd0 993 return ret;
ca9bda00 994}
1da177e4 995
ca9bda00 996void vc_deallocate(unsigned int currcons)
1da177e4
LT		 997{
998 WARN_CONSOLE_UNLOCKED();
999
1000 if (vc_cons_allocated(currcons)) {
1001 struct vc_data *vc = vc_cons[currcons].d;
b293d758 1002 struct vt_notifier_param param = { .vc = vc };
4995f8ef 1003
b293d758 1004 atomic_notifier_call_chain(&vt_notifier_list, VT_DEALLOCATE, &param);
4995f8ef 1005 vcs_remove_sysfs(currcons);
1da177e4 1006 vc->vc_sw->con_deinit(vc);
bde0d2c9 1007 put_pid(vc->vt_pid);
d459ec0b 1008 module_put(vc->vc_sw->owner);
5c9228f0 1009 kfree(vc->vc_screenbuf);
1da177e4
LT		 1010 if (currcons >= MIN_NR_CONSOLES)
1011 kfree(vc);
1012 vc_cons[currcons].d = NULL;
1013 }
1014}
1015
1016/*
1017 * VT102 emulator
1018 */
1019
1020#define set_kbd(vc, x) set_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1021#define clr_kbd(vc, x) clr_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1022#define is_kbd(vc, x) vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1023
1024#define decarm VC_REPEAT
1025#define decckm VC_CKMODE
1026#define kbdapplic VC_APPLIC
1027#define lnm VC_CRLF
1028
1029/*
1030 * this is what the terminal answers to a ESC-Z or csi0c query.
1031 */
1032#define VT100ID "\033[?1;2c"
1033#define VT102ID "\033[?6c"
1034
1035unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7,
1036 8,12,10,14, 9,13,11,15 };
1037
1038/* the default colour table, for VGA+ colour systems */
1039int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
1040 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
1041int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
1042 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
1043int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
1044 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
1045
1c2bbe6a
JE		 1046module_param_array(default_red, int, NULL, S_IRUGO | S_IWUSR);
1047module_param_array(default_grn, int, NULL, S_IRUGO | S_IWUSR);
1048module_param_array(default_blu, int, NULL, S_IRUGO | S_IWUSR);
1049
1da177e4
LT		 1050/*
1051 * gotoxy() must verify all boundaries, because the arguments
1052 * might also be negative. If the given position is out of
1053 * bounds, the cursor is placed at the nearest margin.
1054 */
1055static void gotoxy(struct vc_data *vc, int new_x, int new_y)
1056{
1057 int min_y, max_y;
1058
1059 if (new_x < 0)
1060 vc->vc_x = 0;
1061 else {
1062 if (new_x >= vc->vc_cols)
1063 vc->vc_x = vc->vc_cols - 1;
1064 else
1065 vc->vc_x = new_x;
1066 }
1067
1068 if (vc->vc_decom) {
1069 min_y = vc->vc_top;
1070 max_y = vc->vc_bottom;
1071 } else {
1072 min_y = 0;
1073 max_y = vc->vc_rows;
1074 }
1075 if (new_y < min_y)
1076 vc->vc_y = min_y;
1077 else if (new_y >= max_y)
1078 vc->vc_y = max_y - 1;
1079 else
1080 vc->vc_y = new_y;
1081 vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1);
1082 vc->vc_need_wrap = 0;
1083}
1084
1085/* for absolute user moves, when decom is set */
1086static void gotoxay(struct vc_data *vc, int new_x, int new_y)
1087{
1088 gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y);
1089}
1090
1091void scrollback(struct vc_data *vc, int lines)
1092{
1093 if (!lines)
1094 lines = vc->vc_rows / 2;
1095 scrolldelta(-lines);
1096}
1097
1098void scrollfront(struct vc_data *vc, int lines)
1099{
1100 if (!lines)
1101 lines = vc->vc_rows / 2;
1102 scrolldelta(lines);
1103}
1104
1105static void lf(struct vc_data *vc)
1106{
1107 /* don't scroll if above bottom of scrolling region, or
1108 * if below scrolling region
1109 */
1110 if (vc->vc_y + 1 == vc->vc_bottom)
1111 scrup(vc, vc->vc_top, vc->vc_bottom, 1);
1112 else if (vc->vc_y < vc->vc_rows - 1) {
1113 vc->vc_y++;
1114 vc->vc_pos += vc->vc_size_row;
1115 }
1116 vc->vc_need_wrap = 0;
b293d758 1117 notify_write(vc, '\n');
1da177e4
LT		 1118}
1119
1120static void ri(struct vc_data *vc)
1121{
1122 /* don't scroll if below top of scrolling region, or
1123 * if above scrolling region
1124 */
1125 if (vc->vc_y == vc->vc_top)
1126 scrdown(vc, vc->vc_top, vc->vc_bottom, 1);
1127 else if (vc->vc_y > 0) {
1128 vc->vc_y--;
1129 vc->vc_pos -= vc->vc_size_row;
1130 }
1131 vc->vc_need_wrap = 0;
1132}
1133
1134static inline void cr(struct vc_data *vc)
1135{
1136 vc->vc_pos -= vc->vc_x << 1;
1137 vc->vc_need_wrap = vc->vc_x = 0;
b293d758 1138 notify_write(vc, '\r');
1da177e4
LT		 1139}
1140
1141static inline void bs(struct vc_data *vc)
1142{
1143 if (vc->vc_x) {
1144 vc->vc_pos -= 2;
1145 vc->vc_x--;
1146 vc->vc_need_wrap = 0;
b293d758 1147 notify_write(vc, '\b');
1da177e4
LT		 1148 }
1149}
1150
1151static inline void del(struct vc_data *vc)
1152{
1153 /* ignored */
1154}
1155
1156static void csi_J(struct vc_data *vc, int vpar)
1157{
1158 unsigned int count;
1159 unsigned short * start;
1160
1161 switch (vpar) {
1162 case 0: /* erase from cursor to end of display */
1163 count = (vc->vc_scr_end - vc->vc_pos) >> 1;
1164 start = (unsigned short *)vc->vc_pos;
1165 if (DO_UPDATE(vc)) {
1166 /* do in two stages */
1167 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1168 vc->vc_cols - vc->vc_x);
1169 vc->vc_sw->con_clear(vc, vc->vc_y + 1, 0,
1170 vc->vc_rows - vc->vc_y - 1,
1171 vc->vc_cols);
1172 }
1173 break;
1174 case 1: /* erase from start to cursor */
1175 count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1;
1176 start = (unsigned short *)vc->vc_origin;
1177 if (DO_UPDATE(vc)) {
1178 /* do in two stages */
1179 vc->vc_sw->con_clear(vc, 0, 0, vc->vc_y,
1180 vc->vc_cols);
1181 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1182 vc->vc_x + 1);
1183 }
1184 break;
1185 case 2: /* erase whole display */
1186 count = vc->vc_cols * vc->vc_rows;
1187 start = (unsigned short *)vc->vc_origin;
1188 if (DO_UPDATE(vc))
1189 vc->vc_sw->con_clear(vc, 0, 0,
1190 vc->vc_rows,
1191 vc->vc_cols);
1192 break;
1193 default:
1194 return;
1195 }
1196 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1197 vc->vc_need_wrap = 0;
1198}
1199
1200static void csi_K(struct vc_data *vc, int vpar)
1201{
1202 unsigned int count;
1203 unsigned short * start;
1204
1205 switch (vpar) {
1206 case 0: /* erase from cursor to end of line */
1207 count = vc->vc_cols - vc->vc_x;
1208 start = (unsigned short *)vc->vc_pos;
1209 if (DO_UPDATE(vc))
1210 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1211 vc->vc_cols - vc->vc_x);
1212 break;
1213 case 1: /* erase from start of line to cursor */
1214 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1215 count = vc->vc_x + 1;
1216 if (DO_UPDATE(vc))
1217 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1218 vc->vc_x + 1);
1219 break;
1220 case 2: /* erase whole line */
1221 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1222 count = vc->vc_cols;
1223 if (DO_UPDATE(vc))
1224 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1225 vc->vc_cols);
1226 break;
1227 default:
1228 return;
1229 }
1230 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1231 vc->vc_need_wrap = 0;
1232}
1233
1234static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */
1235{ /* not vt100? */
1236 int count;
1237
1238 if (!vpar)
1239 vpar++;
1240 count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar;
1241
1242 scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count);
1243 if (DO_UPDATE(vc))
1244 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count);
1245 vc->vc_need_wrap = 0;
1246}
1247
1248static void default_attr(struct vc_data *vc)
1249{
1250 vc->vc_intensity = 1;
fa6ce9ab 1251 vc->vc_italic = 0;
1da177e4
LT		 1252 vc->vc_underline = 0;
1253 vc->vc_reverse = 0;
1254 vc->vc_blink = 0;
1255 vc->vc_color = vc->vc_def_color;
1256}
1257
1258/* console_sem is held */
1259static void csi_m(struct vc_data *vc)
1260{
1261 int i;
1262
1263 for (i = 0; i <= vc->vc_npar; i++)
1264 switch (vc->vc_par[i]) {
1265 case 0: /* all attributes off */
1266 default_attr(vc);
1267 break;
1268 case 1:
1269 vc->vc_intensity = 2;
1270 break;
1271 case 2:
1272 vc->vc_intensity = 0;
1273 break;
fa6ce9ab
JE		 1274 case 3:
1275 vc->vc_italic = 1;
1276 break;
1da177e4
LT		 1277 case 4:
1278 vc->vc_underline = 1;
1279 break;
1280 case 5:
1281 vc->vc_blink = 1;
1282 break;
1283 case 7:
1284 vc->vc_reverse = 1;
1285 break;
1286 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1287 * Select primary font, don't display
1288 * control chars if defined, don't set
1289 * bit 8 on output.
1290 */
1291 vc->vc_translate = set_translate(vc->vc_charset == 0
1292 ? vc->vc_G0_charset
1293 : vc->vc_G1_charset, vc);
1294 vc->vc_disp_ctrl = 0;
1295 vc->vc_toggle_meta = 0;
1296 break;
1297 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1298 * Select first alternate font, lets
1299 * chars < 32 be displayed as ROM chars.
1300 */
1301 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1302 vc->vc_disp_ctrl = 1;
1303 vc->vc_toggle_meta = 0;
1304 break;
1305 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1306 * Select second alternate font, toggle
1307 * high bit before displaying as ROM char.
1308 */
1309 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1310 vc->vc_disp_ctrl = 1;
1311 vc->vc_toggle_meta = 1;
1312 break;
1313 case 21:
1314 case 22:
1315 vc->vc_intensity = 1;
1316 break;
fa6ce9ab
JE		 1317 case 23:
1318 vc->vc_italic = 0;
1319 break;
1da177e4
LT		 1320 case 24:
1321 vc->vc_underline = 0;
1322 break;
1323 case 25:
1324 vc->vc_blink = 0;
1325 break;
1326 case 27:
1327 vc->vc_reverse = 0;
1328 break;
1329 case 38: /* ANSI X3.64-1979 (SCO-ish?)
1330 * Enables underscore, white foreground
1331 * with white underscore (Linux - use
1332 * default foreground).
1333 */
1334 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1335 vc->vc_underline = 1;
1336 break;
1337 case 39: /* ANSI X3.64-1979 (SCO-ish?)
1338 * Disable underline option.
1339 * Reset colour to default? It did this
1340 * before...
1341 */
1342 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1343 vc->vc_underline = 0;
1344 break;
1345 case 49:
1346 vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f);
1347 break;
1348 default:
1349 if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37)
1350 vc->vc_color = color_table[vc->vc_par[i] - 30]
1351 | (vc->vc_color & 0xf0);
1352 else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47)
1353 vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4)
1354 | (vc->vc_color & 0x0f);
1355 break;
1356 }
1357 update_attr(vc);
1358}
1359
1360static void respond_string(const char *p, struct tty_struct *tty)
1361{
1362 while (*p) {
1363 tty_insert_flip_char(tty, *p, 0);
1364 p++;
1365 }
1366 con_schedule_flip(tty);
1367}
1368
1369static void cursor_report(struct vc_data *vc, struct tty_struct *tty)
1370{
1371 char buf[40];
1372
1373 sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1);
1374 respond_string(buf, tty);
1375}
1376
1377static inline void status_report(struct tty_struct *tty)
1378{
1379 respond_string("\033[0n", tty); /* Terminal ok */
1380}
1381
1382static inline void respond_ID(struct tty_struct * tty)
1383{
1384 respond_string(VT102ID, tty);
1385}
1386
1387void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry)
1388{
1389 char buf[8];
1390
1391 sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx),
1392 (char)('!' + mry));
1393 respond_string(buf, tty);
1394}
1395
1396/* invoked via ioctl(TIOCLINUX) and through set_selection */
1397int mouse_reporting(void)
1398{
1399 return vc_cons[fg_console].d->vc_report_mouse;
1400}
1401
1402/* console_sem is held */
1403static void set_mode(struct vc_data *vc, int on_off)
1404{
1405 int i;
1406
1407 for (i = 0; i <= vc->vc_npar; i++)
1408 if (vc->vc_ques) {
1409 switch(vc->vc_par[i]) { /* DEC private modes set/reset */
1410 case 1: /* Cursor keys send ^[Ox/^[[x */
1411 if (on_off)
1412 set_kbd(vc, decckm);
1413 else
1414 clr_kbd(vc, decckm);
1415 break;
1416 case 3: /* 80/132 mode switch unimplemented */
1417 vc->vc_deccolm = on_off;
1418#if 0
1419 vc_resize(deccolm ? 132 : 80, vc->vc_rows);
1420 /* this alone does not suffice; some user mode
1421 utility has to change the hardware regs */
1422#endif
1423 break;
1424 case 5: /* Inverted screen on/off */
1425 if (vc->vc_decscnm != on_off) {
1426 vc->vc_decscnm = on_off;
1427 invert_screen(vc, 0, vc->vc_screenbuf_size, 0);
1428 update_attr(vc);
1429 }
1430 break;
1431 case 6: /* Origin relative/absolute */
1432 vc->vc_decom = on_off;
1433 gotoxay(vc, 0, 0);
1434 break;
1435 case 7: /* Autowrap on/off */
1436 vc->vc_decawm = on_off;
1437 break;
1438 case 8: /* Autorepeat on/off */
1439 if (on_off)
1440 set_kbd(vc, decarm);
1441 else
1442 clr_kbd(vc, decarm);
1443 break;
1444 case 9:
1445 vc->vc_report_mouse = on_off ? 1 : 0;
1446 break;
1447 case 25: /* Cursor on/off */
1448 vc->vc_deccm = on_off;
1449 break;
1450 case 1000:
1451 vc->vc_report_mouse = on_off ? 2 : 0;
1452 break;
1453 }
1454 } else {
1455 switch(vc->vc_par[i]) { /* ANSI modes set/reset */
1456 case 3: /* Monitor (display ctrls) */
1457 vc->vc_disp_ctrl = on_off;
1458 break;
1459 case 4: /* Insert Mode on/off */
1460 vc->vc_decim = on_off;
1461 break;
1462 case 20: /* Lf, Enter == CrLf/Lf */
1463 if (on_off)
1464 set_kbd(vc, lnm);
1465 else
1466 clr_kbd(vc, lnm);
1467 break;
1468 }
1469 }
1470}
1471
1472/* console_sem is held */
1473static void setterm_command(struct vc_data *vc)
1474{
1475 switch(vc->vc_par[0]) {
1476 case 1: /* set color for underline mode */
1477 if (vc->vc_can_do_color &&
1478 vc->vc_par[1] < 16) {
1479 vc->vc_ulcolor = color_table[vc->vc_par[1]];
1480 if (vc->vc_underline)
1481 update_attr(vc);
1482 }
1483 break;
1484 case 2: /* set color for half intensity mode */
1485 if (vc->vc_can_do_color &&
1486 vc->vc_par[1] < 16) {
1487 vc->vc_halfcolor = color_table[vc->vc_par[1]];
1488 if (vc->vc_intensity == 0)
1489 update_attr(vc);
1490 }
1491 break;
1492 case 8: /* store colors as defaults */
1493 vc->vc_def_color = vc->vc_attr;
1494 if (vc->vc_hi_font_mask == 0x100)
1495 vc->vc_def_color >>= 1;
1496 default_attr(vc);
1497 update_attr(vc);
1498 break;
1499 case 9: /* set blanking interval */
f324edc8 1500 blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60;
1da177e4
LT		 1501 poke_blanked_console();
1502 break;
1503 case 10: /* set bell frequency in Hz */
1504 if (vc->vc_npar >= 1)
1505 vc->vc_bell_pitch = vc->vc_par[1];
1506 else
1507 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1508 break;
1509 case 11: /* set bell duration in msec */
1510 if (vc->vc_npar >= 1)
1511 vc->vc_bell_duration = (vc->vc_par[1] < 2000) ?
1512 vc->vc_par[1] * HZ / 1000 : 0;
1513 else
1514 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1515 break;
1516 case 12: /* bring specified console to the front */
1517 if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1))
1518 set_console(vc->vc_par[1] - 1);
1519 break;
1520 case 13: /* unblank the screen */
1521 poke_blanked_console();
1522 break;
1523 case 14: /* set vesa powerdown interval */
1524 vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1525 break;
1526 case 15: /* activate the previous console */
1527 set_console(last_console);
1528 break;
1529 }
1530}
1531
1532/* console_sem is held */
1533static void csi_at(struct vc_data *vc, unsigned int nr)
1534{
1535 if (nr > vc->vc_cols - vc->vc_x)
1536 nr = vc->vc_cols - vc->vc_x;
1537 else if (!nr)
1538 nr = 1;
1539 insert_char(vc, nr);
1540}
1541
1542/* console_sem is held */
1543static void csi_L(struct vc_data *vc, unsigned int nr)
1544{
1545 if (nr > vc->vc_rows - vc->vc_y)
1546 nr = vc->vc_rows - vc->vc_y;
1547 else if (!nr)
1548 nr = 1;
1549 scrdown(vc, vc->vc_y, vc->vc_bottom, nr);
1550 vc->vc_need_wrap = 0;
1551}
1552
1553/* console_sem is held */
1554static void csi_P(struct vc_data *vc, unsigned int nr)
1555{
1556 if (nr > vc->vc_cols - vc->vc_x)
1557 nr = vc->vc_cols - vc->vc_x;
1558 else if (!nr)
1559 nr = 1;
1560 delete_char(vc, nr);
1561}
1562
1563/* console_sem is held */
1564static void csi_M(struct vc_data *vc, unsigned int nr)
1565{
1566 if (nr > vc->vc_rows - vc->vc_y)
1567 nr = vc->vc_rows - vc->vc_y;
1568 else if (!nr)
1569 nr=1;
1570 scrup(vc, vc->vc_y, vc->vc_bottom, nr);
1571 vc->vc_need_wrap = 0;
1572}
1573
1574/* console_sem is held (except via vc_init->reset_terminal */
1575static void save_cur(struct vc_data *vc)
1576{
1577 vc->vc_saved_x = vc->vc_x;
1578 vc->vc_saved_y = vc->vc_y;
1579 vc->vc_s_intensity = vc->vc_intensity;
fa6ce9ab 1580 vc->vc_s_italic = vc->vc_italic;
1da177e4
LT		 1581 vc->vc_s_underline = vc->vc_underline;
1582 vc->vc_s_blink = vc->vc_blink;
1583 vc->vc_s_reverse = vc->vc_reverse;
1584 vc->vc_s_charset = vc->vc_charset;
1585 vc->vc_s_color = vc->vc_color;
1586 vc->vc_saved_G0 = vc->vc_G0_charset;
1587 vc->vc_saved_G1 = vc->vc_G1_charset;
1588}
1589
1590/* console_sem is held */
1591static void restore_cur(struct vc_data *vc)
1592{
1593 gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y);
1594 vc->vc_intensity = vc->vc_s_intensity;
fa6ce9ab 1595 vc->vc_italic = vc->vc_s_italic;
1da177e4
LT		 1596 vc->vc_underline = vc->vc_s_underline;
1597 vc->vc_blink = vc->vc_s_blink;
1598 vc->vc_reverse = vc->vc_s_reverse;
1599 vc->vc_charset = vc->vc_s_charset;
1600 vc->vc_color = vc->vc_s_color;
1601 vc->vc_G0_charset = vc->vc_saved_G0;
1602 vc->vc_G1_charset = vc->vc_saved_G1;
1603 vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc);
1604 update_attr(vc);
1605 vc->vc_need_wrap = 0;
1606}
1607
1608enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey,
1609 EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd,
1610 ESpalette };
1611
1612/* console_sem is held (except via vc_init()) */
1613static void reset_terminal(struct vc_data *vc, int do_clear)
1614{
1615 vc->vc_top = 0;
1616 vc->vc_bottom = vc->vc_rows;
1617 vc->vc_state = ESnormal;
1618 vc->vc_ques = 0;
1619 vc->vc_translate = set_translate(LAT1_MAP, vc);
1620 vc->vc_G0_charset = LAT1_MAP;
1621 vc->vc_G1_charset = GRAF_MAP;
1622 vc->vc_charset = 0;
1623 vc->vc_need_wrap = 0;
1624 vc->vc_report_mouse = 0;
042f10ec 1625 vc->vc_utf = default_utf8;
1da177e4
LT		 1626 vc->vc_utf_count = 0;
1627
1628 vc->vc_disp_ctrl = 0;
1629 vc->vc_toggle_meta = 0;
1630
1631 vc->vc_decscnm = 0;
1632 vc->vc_decom = 0;
1633 vc->vc_decawm = 1;
f6c06b68 1634 vc->vc_deccm = global_cursor_default;
1da177e4
LT		 1635 vc->vc_decim = 0;
1636
1637 set_kbd(vc, decarm);
1638 clr_kbd(vc, decckm);
1639 clr_kbd(vc, kbdapplic);
1640 clr_kbd(vc, lnm);
1641 kbd_table[vc->vc_num].lockstate = 0;
1642 kbd_table[vc->vc_num].slockstate = 0;
1643 kbd_table[vc->vc_num].ledmode = LED_SHOW_FLAGS;
1644 kbd_table[vc->vc_num].ledflagstate = kbd_table[vc->vc_num].default_ledflagstate;
1645 /* do not do set_leds here because this causes an endless tasklet loop
1646 when the keyboard hasn't been initialized yet */
1647
9ea9a886 1648 vc->vc_cursor_type = cur_default;
1da177e4
LT		 1649 vc->vc_complement_mask = vc->vc_s_complement_mask;
1650
1651 default_attr(vc);
1652 update_attr(vc);
1653
1654 vc->vc_tab_stop[0] = 0x01010100;
1655 vc->vc_tab_stop[1] =
1656 vc->vc_tab_stop[2] =
1657 vc->vc_tab_stop[3] =
a564738c
WK		 1658 vc->vc_tab_stop[4] =
1659 vc->vc_tab_stop[5] =
1660 vc->vc_tab_stop[6] =
1661 vc->vc_tab_stop[7] = 0x01010101;
1da177e4
LT		 1662
1663 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1664 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1665
1666 gotoxy(vc, 0, 0);
1667 save_cur(vc);
1668 if (do_clear)
1669 csi_J(vc, 2);
1670}
1671
1672/* console_sem is held */
1673static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
1674{
1675 /*
1676 * Control characters can be used in the _middle_
1677 * of an escape sequence.
1678 */
1679 switch (c) {
1680 case 0:
1681 return;
1682 case 7:
1683 if (vc->vc_bell_duration)
1684 kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration);
1685 return;
1686 case 8:
1687 bs(vc);
1688 return;
1689 case 9:
1690 vc->vc_pos -= (vc->vc_x << 1);
1691 while (vc->vc_x < vc->vc_cols - 1) {
1692 vc->vc_x++;
1693 if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31)))
1694 break;
1695 }
1696 vc->vc_pos += (vc->vc_x << 1);
b293d758 1697 notify_write(vc, '\t');
1da177e4
LT		 1698 return;
1699 case 10: case 11: case 12:
1700 lf(vc);
1701 if (!is_kbd(vc, lnm))
1702 return;
1703 case 13:
1704 cr(vc);
1705 return;
1706 case 14:
1707 vc->vc_charset = 1;
1708 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1709 vc->vc_disp_ctrl = 1;
1710 return;
1711 case 15:
1712 vc->vc_charset = 0;
1713 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1714 vc->vc_disp_ctrl = 0;
1715 return;
1716 case 24: case 26:
1717 vc->vc_state = ESnormal;
1718 return;
1719 case 27:
1720 vc->vc_state = ESesc;
1721 return;
1722 case 127:
1723 del(vc);
1724 return;
1725 case 128+27:
1726 vc->vc_state = ESsquare;
1727 return;
1728 }
1729 switch(vc->vc_state) {
1730 case ESesc:
1731 vc->vc_state = ESnormal;
1732 switch (c) {
1733 case '[':
1734 vc->vc_state = ESsquare;
1735 return;
1736 case ']':
1737 vc->vc_state = ESnonstd;
1738 return;
1739 case '%':
1740 vc->vc_state = ESpercent;
1741 return;
1742 case 'E':
1743 cr(vc);
1744 lf(vc);
1745 return;
1746 case 'M':
1747 ri(vc);
1748 return;
1749 case 'D':
1750 lf(vc);
1751 return;
1752 case 'H':
1753 vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31));
1754 return;
1755 case 'Z':
1756 respond_ID(tty);
1757 return;
1758 case '7':
1759 save_cur(vc);
1760 return;
1761 case '8':
1762 restore_cur(vc);
1763 return;
1764 case '(':
1765 vc->vc_state = ESsetG0;
1766 return;
1767 case ')':
1768 vc->vc_state = ESsetG1;
1769 return;
1770 case '#':
1771 vc->vc_state = EShash;
1772 return;
1773 case 'c':
1774 reset_terminal(vc, 1);
1775 return;
1776 case '>': /* Numeric keypad */
1777 clr_kbd(vc, kbdapplic);
1778 return;
1779 case '=': /* Appl. keypad */
1780 set_kbd(vc, kbdapplic);
1781 return;
1782 }
1783 return;
1784 case ESnonstd:
1785 if (c=='P') { /* palette escape sequence */
1786 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1787 vc->vc_par[vc->vc_npar] = 0;
1788 vc->vc_npar = 0;
1789 vc->vc_state = ESpalette;
1790 return;
1791 } else if (c=='R') { /* reset palette */
1792 reset_palette(vc);
1793 vc->vc_state = ESnormal;
1794 } else
1795 vc->vc_state = ESnormal;
1796 return;
1797 case ESpalette:
1798 if ( (c>='0'&&c<='9') || (c>='A'&&c<='F') || (c>='a'&&c<='f') ) {
1799 vc->vc_par[vc->vc_npar++] = (c > '9' ? (c & 0xDF) - 'A' + 10 : c - '0');
1800 if (vc->vc_npar == 7) {
1801 int i = vc->vc_par[0] * 3, j = 1;
1802 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1803 vc->vc_palette[i++] += vc->vc_par[j++];
1804 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1805 vc->vc_palette[i++] += vc->vc_par[j++];
1806 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1807 vc->vc_palette[i] += vc->vc_par[j];
1808 set_palette(vc);
1809 vc->vc_state = ESnormal;
1810 }
1811 } else
1812 vc->vc_state = ESnormal;
1813 return;
1814 case ESsquare:
1815 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1816 vc->vc_par[vc->vc_npar] = 0;
1817 vc->vc_npar = 0;
1818 vc->vc_state = ESgetpars;
1819 if (c == '[') { /* Function key */
1820 vc->vc_state=ESfunckey;
1821 return;
1822 }
1823 vc->vc_ques = (c == '?');
1824 if (vc->vc_ques)
1825 return;
1826 case ESgetpars:
1827 if (c == ';' && vc->vc_npar < NPAR - 1) {
1828 vc->vc_npar++;
1829 return;
1830 } else if (c>='0' && c<='9') {
1831 vc->vc_par[vc->vc_npar] *= 10;
1832 vc->vc_par[vc->vc_npar] += c - '0';
1833 return;
1834 } else
1835 vc->vc_state = ESgotpars;
1836 case ESgotpars:
1837 vc->vc_state = ESnormal;
1838 switch(c) {
1839 case 'h':
1840 set_mode(vc, 1);
1841 return;
1842 case 'l':
1843 set_mode(vc, 0);
1844 return;
1845 case 'c':
1846 if (vc->vc_ques) {
1847 if (vc->vc_par[0])
1848 vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16);
1849 else
9ea9a886 1850 vc->vc_cursor_type = cur_default;
1da177e4
LT		 1851 return;
1852 }
1853 break;
1854 case 'm':
1855 if (vc->vc_ques) {
1856 clear_selection();
1857 if (vc->vc_par[0])
1858 vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1];
1859 else
1860 vc->vc_complement_mask = vc->vc_s_complement_mask;
1861 return;
1862 }
1863 break;
1864 case 'n':
1865 if (!vc->vc_ques) {
1866 if (vc->vc_par[0] == 5)
1867 status_report(tty);
1868 else if (vc->vc_par[0] == 6)
1869 cursor_report(vc, tty);
1870 }
1871 return;
1872 }
1873 if (vc->vc_ques) {
1874 vc->vc_ques = 0;
1875 return;
1876 }
1877 switch(c) {
1878 case 'G': case '`':
1879 if (vc->vc_par[0])
1880 vc->vc_par[0]--;
1881 gotoxy(vc, vc->vc_par[0], vc->vc_y);
1882 return;
1883 case 'A':
1884 if (!vc->vc_par[0])
1885 vc->vc_par[0]++;
1886 gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]);
1887 return;
1888 case 'B': case 'e':
1889 if (!vc->vc_par[0])
1890 vc->vc_par[0]++;
1891 gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]);
1892 return;
1893 case 'C': case 'a':
1894 if (!vc->vc_par[0])
1895 vc->vc_par[0]++;
1896 gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y);
1897 return;
1898 case 'D':
1899 if (!vc->vc_par[0])
1900 vc->vc_par[0]++;
1901 gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y);
1902 return;
1903 case 'E':
1904 if (!vc->vc_par[0])
1905 vc->vc_par[0]++;
1906 gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]);
1907 return;
1908 case 'F':
1909 if (!vc->vc_par[0])
1910 vc->vc_par[0]++;
1911 gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]);
1912 return;
1913 case 'd':
1914 if (vc->vc_par[0])
1915 vc->vc_par[0]--;
1916 gotoxay(vc, vc->vc_x ,vc->vc_par[0]);
1917 return;
1918 case 'H': case 'f':
1919 if (vc->vc_par[0])
1920 vc->vc_par[0]--;
1921 if (vc->vc_par[1])
1922 vc->vc_par[1]--;
1923 gotoxay(vc, vc->vc_par[1], vc->vc_par[0]);
1924 return;
1925 case 'J':
1926 csi_J(vc, vc->vc_par[0]);
1927 return;
1928 case 'K':
1929 csi_K(vc, vc->vc_par[0]);
1930 return;
1931 case 'L':
1932 csi_L(vc, vc->vc_par[0]);
1933 return;
1934 case 'M':
1935 csi_M(vc, vc->vc_par[0]);
1936 return;
1937 case 'P':
1938 csi_P(vc, vc->vc_par[0]);
1939 return;
1940 case 'c':
1941 if (!vc->vc_par[0])
1942 respond_ID(tty);
1943 return;
1944 case 'g':
1945 if (!vc->vc_par[0])
1946 vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31));
1947 else if (vc->vc_par[0] == 3) {
1948 vc->vc_tab_stop[0] =
1949 vc->vc_tab_stop[1] =
1950 vc->vc_tab_stop[2] =
1951 vc->vc_tab_stop[3] =
a564738c
WK		 1952 vc->vc_tab_stop[4] =
1953 vc->vc_tab_stop[5] =
1954 vc->vc_tab_stop[6] =
1955 vc->vc_tab_stop[7] = 0;
1da177e4
LT		 1956 }
1957 return;
1958 case 'm':
1959 csi_m(vc);
1960 return;
1961 case 'q': /* DECLL - but only 3 leds */
1962 /* map 0,1,2,3 to 0,1,2,4 */
1963 if (vc->vc_par[0] < 4)
1964 setledstate(kbd_table + vc->vc_num,
1965 (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4);
1966 return;
1967 case 'r':
1968 if (!vc->vc_par[0])
1969 vc->vc_par[0]++;
1970 if (!vc->vc_par[1])
1971 vc->vc_par[1] = vc->vc_rows;
1972 /* Minimum allowed region is 2 lines */
1973 if (vc->vc_par[0] < vc->vc_par[1] &&
1974 vc->vc_par[1] <= vc->vc_rows) {
1975 vc->vc_top = vc->vc_par[0] - 1;
1976 vc->vc_bottom = vc->vc_par[1];
1977 gotoxay(vc, 0, 0);
1978 }
1979 return;
1980 case 's':
1981 save_cur(vc);
1982 return;
1983 case 'u':
1984 restore_cur(vc);
1985 return;
1986 case 'X':
1987 csi_X(vc, vc->vc_par[0]);
1988 return;
1989 case '@':
1990 csi_at(vc, vc->vc_par[0]);
1991 return;
1992 case ']': /* setterm functions */
1993 setterm_command(vc);
1994 return;
1995 }
1996 return;
1997 case ESpercent:
1998 vc->vc_state = ESnormal;
1999 switch (c) {
2000 case '@': /* defined in ISO 2022 */
2001 vc->vc_utf = 0;
2002 return;
2003 case 'G': /* prelim official escape code */
2004 case '8': /* retained for compatibility */
2005 vc->vc_utf = 1;
2006 return;
2007 }
2008 return;
2009 case ESfunckey:
2010 vc->vc_state = ESnormal;
2011 return;
2012 case EShash:
2013 vc->vc_state = ESnormal;
2014 if (c == '8') {
2015 /* DEC screen alignment test. kludge :-) */
2016 vc->vc_video_erase_char =
2017 (vc->vc_video_erase_char & 0xff00) | 'E';
2018 csi_J(vc, 2);
2019 vc->vc_video_erase_char =
2020 (vc->vc_video_erase_char & 0xff00) | ' ';
2021 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
2022 }
2023 return;
2024 case ESsetG0:
2025 if (c == '0')
2026 vc->vc_G0_charset = GRAF_MAP;
2027 else if (c == 'B')
2028 vc->vc_G0_charset = LAT1_MAP;
2029 else if (c == 'U')
2030 vc->vc_G0_charset = IBMPC_MAP;
2031 else if (c == 'K')
2032 vc->vc_G0_charset = USER_MAP;
2033 if (vc->vc_charset == 0)
2034 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
2035 vc->vc_state = ESnormal;
2036 return;
2037 case ESsetG1:
2038 if (c == '0')
2039 vc->vc_G1_charset = GRAF_MAP;
2040 else if (c == 'B')
2041 vc->vc_G1_charset = LAT1_MAP;
2042 else if (c == 'U')
2043 vc->vc_G1_charset = IBMPC_MAP;
2044 else if (c == 'K')
2045 vc->vc_G1_charset = USER_MAP;
2046 if (vc->vc_charset == 1)
2047 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
2048 vc->vc_state = ESnormal;
2049 return;
2050 default:
2051 vc->vc_state = ESnormal;
2052 }
2053}
2054
2055/* This is a temporary buffer used to prepare a tty console write
2056 * so that we can easily avoid touching user space while holding the
2057 * console spinlock. It is allocated in con_init and is shared by
2058 * this code and the vc_screen read/write tty calls.
2059 *
2060 * We have to allocate this statically in the kernel data section
2061 * since console_init (and thus con_init) are called before any
2062 * kernel memory allocation is available.
2063 */
2064char con_buf[CON_BUF_SIZE];
c831c338 2065DEFINE_MUTEX(con_buf_mtx);
1da177e4 2066
2f1a2ccb 2067/* is_double_width() is based on the wcwidth() implementation by
1ed8a2b3 2068 * Markus Kuhn -- 2007-05-26 (Unicode 5.0)
2f1a2ccb
EK		 2069 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
2070 */
2071struct interval {
2072 uint32_t first;
2073 uint32_t last;
2074};
2075
2076static int bisearch(uint32_t ucs, const struct interval *table, int max)
2077{
2078 int min = 0;
2079 int mid;
2080
2081 if (ucs < table[0].first || ucs > table[max].last)
2082 return 0;
2083 while (max >= min) {
2084 mid = (min + max) / 2;
2085 if (ucs > table[mid].last)
2086 min = mid + 1;
2087 else if (ucs < table[mid].first)
2088 max = mid - 1;
2089 else
2090 return 1;
2091 }
2092 return 0;
2093}
2094
2095static int is_double_width(uint32_t ucs)
2096{
2097 static const struct interval double_width[] = {
2098 { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E },
2099 { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF },
1ed8a2b3
EK		 2100 { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 },
2101 { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD }
2f1a2ccb 2102 };
0f11541b 2103 return bisearch(ucs, double_width, ARRAY_SIZE(double_width) - 1);
2f1a2ccb
EK		 2104}
2105
1da177e4
LT		 2106/* acquires console_sem */
2107static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2108{
2109#ifdef VT_BUF_VRAM_ONLY
2110#define FLUSH do { } while(0);
2111#else
2112#define FLUSH if (draw_x >= 0) { \
2113 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
2114 draw_x = -1; \
2115 }
2116#endif
2117
2118 int c, tc, ok, n = 0, draw_x = -1;
2119 unsigned int currcons;
2120 unsigned long draw_from = 0, draw_to = 0;
2121 struct vc_data *vc;
2f1a2ccb 2122 unsigned char vc_attr;
0341a4d0 2123 struct vt_notifier_param param;
2f1a2ccb
EK		 2124 uint8_t rescan;
2125 uint8_t inverse;
2126 uint8_t width;
1da177e4 2127 u16 himask, charmask;
1da177e4
LT		 2128
2129 if (in_interrupt())
2130 return count;
2131
2132 might_sleep();
2133
2134 acquire_console_sem();
2135 vc = tty->driver_data;
2136 if (vc == NULL) {
2137 printk(KERN_ERR "vt: argh, driver_data is NULL !\n");
2138 release_console_sem();
2139 return 0;
2140 }
2141
2142 currcons = vc->vc_num;
2143 if (!vc_cons_allocated(currcons)) {
2144 /* could this happen? */
9074d963 2145 printk_once("con_write: tty %d not allocated\n", currcons+1);
1da177e4
LT		 2146 release_console_sem();
2147 return 0;
2148 }
1da177e4 2149
1da177e4
LT		 2150 himask = vc->vc_hi_font_mask;
2151 charmask = himask ? 0x1ff : 0xff;
2152
2153 /* undraw cursor first */
2154 if (IS_FG(vc))
2155 hide_cursor(vc);
2156
0341a4d0
KD		 2157 param.vc = vc;
2158
1da177e4
LT		 2159 while (!tty->stopped && count) {
2160 int orig = *buf;
2161 c = orig;
2162 buf++;
2163 n++;
2164 count--;
2f1a2ccb
EK		 2165 rescan = 0;
2166 inverse = 0;
2167 width = 1;
1da177e4
LT		 2168
2169 /* Do no translation at all in control states */
2170 if (vc->vc_state != ESnormal) {
2171 tc = c;
d4328b40 2172 } else if (vc->vc_utf && !vc->vc_disp_ctrl) {
2f1a2ccb
EK		 2173 /* Combine UTF-8 into Unicode in vc_utf_char.
2174 * vc_utf_count is the number of continuation bytes still
2175 * expected to arrive.
2176 * vc_npar is the number of continuation bytes arrived so
2177 * far
2178 */
d4328b40 2179rescan_last_byte:
2f1a2ccb
EK		 2180 if ((c & 0xc0) == 0x80) {
2181 /* Continuation byte received */
2182 static const uint32_t utf8_length_changes[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff };
d4328b40 2183 if (vc->vc_utf_count) {
2f1a2ccb
EK		 2184 vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f);
2185 vc->vc_npar++;
2186 if (--vc->vc_utf_count) {
2187 /* Still need some bytes */
1da177e4 2188 continue;
2f1a2ccb
EK		 2189 }
2190 /* Got a whole character */
2191 c = vc->vc_utf_char;
2192 /* Reject overlong sequences */
2193 if (c <= utf8_length_changes[vc->vc_npar - 1] ||
2194 c > utf8_length_changes[vc->vc_npar])
2195 c = 0xfffd;
2196 } else {
2197 /* Unexpected continuation byte */
2198 vc->vc_utf_count = 0;
2199 c = 0xfffd;
2200 }
1da177e4 2201 } else {
2f1a2ccb
EK		 2202 /* Single ASCII byte or first byte of a sequence received */
2203 if (vc->vc_utf_count) {
2204 /* Continuation byte expected */
2205 rescan = 1;
2206 vc->vc_utf_count = 0;
2207 c = 0xfffd;
2208 } else if (c > 0x7f) {
2209 /* First byte of a multibyte sequence received */
2210 vc->vc_npar = 0;
2211 if ((c & 0xe0) == 0xc0) {
2212 vc->vc_utf_count = 1;
2213 vc->vc_utf_char = (c & 0x1f);
2214 } else if ((c & 0xf0) == 0xe0) {
2215 vc->vc_utf_count = 2;
2216 vc->vc_utf_char = (c & 0x0f);
2217 } else if ((c & 0xf8) == 0xf0) {
2218 vc->vc_utf_count = 3;
2219 vc->vc_utf_char = (c & 0x07);
2220 } else if ((c & 0xfc) == 0xf8) {
2221 vc->vc_utf_count = 4;
2222 vc->vc_utf_char = (c & 0x03);
2223 } else if ((c & 0xfe) == 0xfc) {
2224 vc->vc_utf_count = 5;
2225 vc->vc_utf_char = (c & 0x01);
2226 } else {
2227 /* 254 and 255 are invalid */
2228 c = 0xfffd;
2229 }
2230 if (vc->vc_utf_count) {
2231 /* Still need some bytes */
2232 continue;
2233 }
2234 }
2235 /* Nothing to do if an ASCII byte was received */
1da177e4 2236 }
2f1a2ccb
EK		 2237 /* End of UTF-8 decoding. */
2238 /* c is the received character, or U+FFFD for invalid sequences. */
2239 /* Replace invalid Unicode code points with U+FFFD too */
2240 if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff)
2241 c = 0xfffd;
2242 tc = c;
d4328b40 2243 } else { /* no utf or alternate charset mode */
a29ccf6f 2244 tc = vc_translate(vc, c);
1da177e4
LT		 2245 }
2246
0341a4d0
KD		 2247 param.c = tc;
2248 if (atomic_notifier_call_chain(&vt_notifier_list, VT_PREWRITE,
2249 &param) == NOTIFY_STOP)
2250 continue;
2251
1da177e4
LT		 2252 /* If the original code was a control character we
2253 * only allow a glyph to be displayed if the code is
2254 * not normally used (such as for cursor movement) or
2255 * if the disp_ctrl mode has been explicitly enabled.
2256 * Certain characters (as given by the CTRL_ALWAYS
2257 * bitmap) are always displayed as control characters,
2258 * as the console would be pretty useless without
2259 * them; to display an arbitrary font position use the
2260 * direct-to-font zone in UTF-8 mode.
2261 */
2262 ok = tc && (c >= 32 ||
d4328b40
AT		 2263 !(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 :
2264 vc->vc_utf || ((CTRL_ACTION >> c) & 1)))
1da177e4
LT		 2265 && (c != 127 || vc->vc_disp_ctrl)
2266 && (c != 128+27);
2267
2268 if (vc->vc_state == ESnormal && ok) {
2f1a2ccb
EK		 2269 if (vc->vc_utf && !vc->vc_disp_ctrl) {
2270 if (is_double_width(c))
2271 width = 2;
2272 }
1da177e4
LT		 2273 /* Now try to find out how to display it */
2274 tc = conv_uni_to_pc(vc, tc);
d4328b40 2275 if (tc & ~charmask) {
2f1a2ccb
EK		 2276 if (tc == -1 || tc == -2) {
2277 continue; /* nothing to display */
2278 }
2279 /* Glyph not found */
c0b79882 2280 if ((!(vc->vc_utf && !vc->vc_disp_ctrl) || c < 128) && !(c & ~charmask)) {
2f1a2ccb 2281 /* In legacy mode use the glyph we get by a 1:1 mapping.
1ed8a2b3
EK		 2282 This would make absolutely no sense with Unicode in mind,
2283 but do this for ASCII characters since a font may lack
2284 Unicode mapping info and we don't want to end up with
2285 having question marks only. */
2f1a2ccb
EK		 2286 tc = c;
2287 } else {
2288 /* Display U+FFFD. If it's not found, display an inverse question mark. */
2289 tc = conv_uni_to_pc(vc, 0xfffd);
2290 if (tc < 0) {
2291 inverse = 1;
2292 tc = conv_uni_to_pc(vc, '?');
2293 if (tc < 0) tc = '?';
2294 }
2295 }
d4328b40 2296 }
1da177e4 2297
2f1a2ccb
EK		 2298 if (!inverse) {
2299 vc_attr = vc->vc_attr;
1da177e4 2300 } else {
2f1a2ccb
EK		 2301 /* invert vc_attr */
2302 if (!vc->vc_can_do_color) {
2303 vc_attr = (vc->vc_attr) ^ 0x08;
2304 } else if (vc->vc_hi_font_mask == 0x100) {
2305 vc_attr = ((vc->vc_attr) & 0x11) | (((vc->vc_attr) & 0xe0) >> 4) | (((vc->vc_attr) & 0x0e) << 4);
2306 } else {
2307 vc_attr = ((vc->vc_attr) & 0x88) | (((vc->vc_attr) & 0x70) >> 4) | (((vc->vc_attr) & 0x07) << 4);
2308 }
1ed8a2b3 2309 FLUSH
1da177e4 2310 }
2f1a2ccb
EK		 2311
2312 while (1) {
2313 if (vc->vc_need_wrap || vc->vc_decim)
2314 FLUSH
2315 if (vc->vc_need_wrap) {
2316 cr(vc);
2317 lf(vc);
2318 }
2319 if (vc->vc_decim)
2320 insert_char(vc, 1);
2321 scr_writew(himask ?
2322 ((vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) :
2323 (vc_attr << 8) + tc,
2324 (u16 *) vc->vc_pos);
2325 if (DO_UPDATE(vc) && draw_x < 0) {
2326 draw_x = vc->vc_x;
2327 draw_from = vc->vc_pos;
2328 }
2329 if (vc->vc_x == vc->vc_cols - 1) {
2330 vc->vc_need_wrap = vc->vc_decawm;
2331 draw_to = vc->vc_pos + 2;
2332 } else {
2333 vc->vc_x++;
2334 draw_to = (vc->vc_pos += 2);
d4328b40 2335 }
2f1a2ccb
EK		 2336
2337 if (!--width) break;
2338
2339 tc = conv_uni_to_pc(vc, ' '); /* A space is printed in the second column */
2340 if (tc < 0) tc = ' ';
2341 }
b293d758 2342 notify_write(vc, c);
2f1a2ccb 2343
1ed8a2b3
EK		 2344 if (inverse) {
2345 FLUSH
2346 }
2347
2f1a2ccb
EK		 2348 if (rescan) {
2349 rescan = 0;
2350 inverse = 0;
2351 width = 1;
d4328b40
AT		 2352 c = orig;
2353 goto rescan_last_byte;
2354 }
1da177e4
LT		 2355 continue;
2356 }
2357 FLUSH
2358 do_con_trol(tty, vc, orig);
2359 }
2360 FLUSH
2361 console_conditional_schedule();
2362 release_console_sem();
b293d758 2363 notify_update(vc);
1da177e4
LT		 2364 return n;
2365#undef FLUSH
2366}
2367
2368/*
2369 * This is the console switching callback.
2370 *
2371 * Doing console switching in a process context allows
2372 * us to do the switches asynchronously (needed when we want
2373 * to switch due to a keyboard interrupt). Synchronization
2374 * with other console code and prevention of re-entrancy is
2375 * ensured with console_sem.
2376 */
65f27f38 2377static void console_callback(struct work_struct *ignored)
1da177e4
LT		 2378{
2379 acquire_console_sem();
2380
2381 if (want_console >= 0) {
2382 if (want_console != fg_console &&
2383 vc_cons_allocated(want_console)) {
2384 hide_cursor(vc_cons[fg_console].d);
2385 change_console(vc_cons[want_console].d);
2386 /* we only changed when the console had already
2387 been allocated - a new console is not created
2388 in an interrupt routine */
2389 }
2390 want_console = -1;
2391 }
2392 if (do_poke_blanked_console) { /* do not unblank for a LED change */
2393 do_poke_blanked_console = 0;
2394 poke_blanked_console();
2395 }
2396 if (scrollback_delta) {
2397 struct vc_data *vc = vc_cons[fg_console].d;
2398 clear_selection();
2399 if (vc->vc_mode == KD_TEXT)
2400 vc->vc_sw->con_scrolldelta(vc, scrollback_delta);
2401 scrollback_delta = 0;
2402 }
2403 if (blank_timer_expired) {
2404 do_blank_screen(0);
2405 blank_timer_expired = 0;
2406 }
b293d758 2407 notify_update(vc_cons[fg_console].d);
1da177e4
LT		 2408
2409 release_console_sem();
2410}
2411
b257bc05 2412int set_console(int nr)
1da177e4 2413{
b257bc05
AJ		 2414 struct vc_data *vc = vc_cons[fg_console].d;
2415
2416 if (!vc_cons_allocated(nr) || vt_dont_switch ||
2417 (vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) {
2418
2419 /*
2420 * Console switch will fail in console_callback() or
2421 * change_console() so there is no point scheduling
2422 * the callback
2423 *
2424 * Existing set_console() users don't check the return
2425 * value so this shouldn't break anything
2426 */
2427 return -EINVAL;
2428 }
2429
1da177e4
LT		 2430 want_console = nr;
2431 schedule_console_callback();
b257bc05
AJ		 2432
2433 return 0;
1da177e4
LT		 2434}
2435
2436struct tty_driver *console_driver;
2437
2438#ifdef CONFIG_VT_CONSOLE
2439
5ada918b
BW		 2440/**
2441 * vt_kmsg_redirect() - Sets/gets the kernel message console
2442 * @new: The new virtual terminal number or -1 if the console should stay
2443 * unchanged
2444 *
2445 * By default, the kernel messages are always printed on the current virtual
2446 * console. However, the user may modify that default with the
2447 * TIOCL_SETKMSGREDIRECT ioctl call.
2448 *
2449 * This function sets the kernel message console to be @new. It returns the old
2450 * virtual console number. The virtual terminal number 0 (both as parameter and
2451 * return value) means no redirection (i.e. always printed on the currently
2452 * active console).
2453 *
2454 * The parameter -1 means that only the current console is returned, but the
2455 * value is not modified. You may use the macro vt_get_kmsg_redirect() in that
2456 * case to make the code more understandable.
2457 *
2458 * When the kernel is compiled without CONFIG_VT_CONSOLE, this function ignores
2459 * the parameter and always returns 0.
2460 */
2461int vt_kmsg_redirect(int new)
2462{
2463 static int kmsg_con;
2464
2465 if (new != -1)
2466 return xchg(&kmsg_con, new);
2467 else
2468 return kmsg_con;
2469}
2470
1da177e4
LT		 2471/*
2472 * Console on virtual terminal
2473 *
2474 * The console must be locked when we get here.
2475 */
2476
2477static void vt_console_print(struct console *co, const char *b, unsigned count)
2478{
2479 struct vc_data *vc = vc_cons[fg_console].d;
2480 unsigned char c;
b0940003 2481 static DEFINE_SPINLOCK(printing_lock);
1da177e4
LT		 2482 const ushort *start;
2483 ushort cnt = 0;
2484 ushort myx;
5ada918b 2485 int kmsg_console;
1da177e4
LT		 2486
2487 /* console busy or not yet initialized */
b0940003
NP		 2488 if (!printable)
2489 return;
2490 if (!spin_trylock(&printing_lock))
1da177e4
LT		 2491 return;
2492
5ada918b
BW		 2493 kmsg_console = vt_get_kmsg_redirect();
2494 if (kmsg_console && vc_cons_allocated(kmsg_console - 1))
2495 vc = vc_cons[kmsg_console - 1].d;
1da177e4
LT		 2496
2497 /* read `x' only after setting currcons properly (otherwise
2498 the `x' macro will read the x of the foreground console). */
2499 myx = vc->vc_x;
2500
2501 if (!vc_cons_allocated(fg_console)) {
2502 /* impossible */
2503 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2504 goto quit;
2505 }
2506
2507 if (vc->vc_mode != KD_TEXT)
2508 goto quit;
2509
2510 /* undraw cursor first */
2511 if (IS_FG(vc))
2512 hide_cursor(vc);
2513
2514 start = (ushort *)vc->vc_pos;
2515
2516 /* Contrived structure to try to emulate original need_wrap behaviour
2517 * Problems caused when we have need_wrap set on '\n' character */
2518 while (count--) {
2519 c = *b++;
2520 if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) {
2521 if (cnt > 0) {
2522 if (CON_IS_VISIBLE(vc))
2523 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2524 vc->vc_x += cnt;
2525 if (vc->vc_need_wrap)
2526 vc->vc_x--;
2527 cnt = 0;
2528 }
2529 if (c == 8) { /* backspace */
2530 bs(vc);
2531 start = (ushort *)vc->vc_pos;
2532 myx = vc->vc_x;
2533 continue;
2534 }
2535 if (c != 13)
2536 lf(vc);
2537 cr(vc);
2538 start = (ushort *)vc->vc_pos;
2539 myx = vc->vc_x;
2540 if (c == 10 || c == 13)
2541 continue;
2542 }
2543 scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos);
b293d758 2544 notify_write(vc, c);
1da177e4
LT		 2545 cnt++;
2546 if (myx == vc->vc_cols - 1) {
2547 vc->vc_need_wrap = 1;
2548 continue;
2549 }
2550 vc->vc_pos += 2;
2551 myx++;
2552 }
2553 if (cnt > 0) {
2554 if (CON_IS_VISIBLE(vc))
2555 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2556 vc->vc_x += cnt;
2557 if (vc->vc_x == vc->vc_cols) {
2558 vc->vc_x--;
2559 vc->vc_need_wrap = 1;
2560 }
2561 }
2562 set_cursor(vc);
b293d758 2563 notify_update(vc);
1da177e4
LT		 2564
2565quit:
b0940003 2566 spin_unlock(&printing_lock);
1da177e4
LT		 2567}
2568
2569static struct tty_driver *vt_console_device(struct console *c, int *index)
2570{
2571 *index = c->index ? c->index-1 : fg_console;
2572 return console_driver;
2573}
2574
2575static struct console vt_console_driver = {
2576 .name = "tty",
2577 .write = vt_console_print,
2578 .device = vt_console_device,
2579 .unblank = unblank_screen,
2580 .flags = CON_PRINTBUFFER,
2581 .index = -1,
2582};
2583#endif
2584
2585/*
2586 * Handling of Linux-specific VC ioctls
2587 */
2588
2589/*
2590 * Generally a bit racy with respect to console_sem().
2591 *
2592 * There are some functions which don't need it.
2593 *
2594 * There are some functions which can sleep for arbitrary periods
2595 * (paste_selection) but we don't need the lock there anyway.
2596 *
2597 * set_selection has locking, and definitely needs it
2598 */
2599
2600int tioclinux(struct tty_struct *tty, unsigned long arg)
2601{
2602 char type, data;
2603 char __user *p = (char __user *)arg;
2604 int lines;
2605 int ret;
2606
1da177e4
LT		 2607 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN))
2608 return -EPERM;
2609 if (get_user(type, p))
2610 return -EFAULT;
2611 ret = 0;
04f378b1
AC		 2612
2613 lock_kernel();
2614
1da177e4
LT		 2615 switch (type)
2616 {
2617 case TIOCL_SETSEL:
2618 acquire_console_sem();
2619 ret = set_selection((struct tiocl_selection __user *)(p+1), tty);
2620 release_console_sem();
2621 break;
2622 case TIOCL_PASTESEL:
2623 ret = paste_selection(tty);
2624 break;
2625 case TIOCL_UNBLANKSCREEN:
2d237c63 2626 acquire_console_sem();
1da177e4 2627 unblank_screen();
2d237c63 2628 release_console_sem();
1da177e4
LT		 2629 break;
2630 case TIOCL_SELLOADLUT:
2631 ret = sel_loadlut(p);
2632 break;
2633 case TIOCL_GETSHIFTSTATE:
04f378b1 2634
1da177e4
LT		 2635 /*
2636 * Make it possible to react to Shift+Mousebutton.
2637 * Note that 'shift_state' is an undocumented
2638 * kernel-internal variable; programs not closely
2639 * related to the kernel should not use this.
2640 */
2641 data = shift_state;
2642 ret = __put_user(data, p);
2643 break;
2644 case TIOCL_GETMOUSEREPORTING:
2645 data = mouse_reporting();
2646 ret = __put_user(data, p);
2647 break;
2648 case TIOCL_SETVESABLANK:
403aac96 2649 ret = set_vesa_blanking(p);
1da177e4 2650 break;
0ca07731 2651 case TIOCL_GETKMSGREDIRECT:
5ada918b 2652 data = vt_get_kmsg_redirect();
0ca07731
RW		 2653 ret = __put_user(data, p);
2654 break;
1da177e4
LT		 2655 case TIOCL_SETKMSGREDIRECT:
2656 if (!capable(CAP_SYS_ADMIN)) {
2657 ret = -EPERM;
2658 } else {
2659 if (get_user(data, p+1))
2660 ret = -EFAULT;
2661 else
5ada918b 2662 vt_kmsg_redirect(data);
1da177e4
LT		 2663 }
2664 break;
2665 case TIOCL_GETFGCONSOLE:
2666 ret = fg_console;
2667 break;
2668 case TIOCL_SCROLLCONSOLE:
2669 if (get_user(lines, (s32 __user *)(p+4))) {
2670 ret = -EFAULT;
2671 } else {
2672 scrollfront(vc_cons[fg_console].d, lines);
2673 ret = 0;
2674 }
2675 break;
2676 case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
2d237c63 2677 acquire_console_sem();
1da177e4
LT		 2678 ignore_poke = 1;
2679 do_blank_screen(0);
2d237c63 2680 release_console_sem();
1da177e4
LT		 2681 break;
2682 case TIOCL_BLANKEDSCREEN:
2683 ret = console_blanked;
2684 break;
2685 default:
2686 ret = -EINVAL;
2687 break;
2688 }
04f378b1 2689 unlock_kernel();
1da177e4
LT		 2690 return ret;
2691}
2692
2693/*
2694 * /dev/ttyN handling
2695 */
2696
2697static int con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2698{
2699 int retval;
2700
2701 retval = do_con_write(tty, buf, count);
2702 con_flush_chars(tty);
2703
2704 return retval;
2705}
2706
5d19f546 2707static int con_put_char(struct tty_struct *tty, unsigned char ch)
1da177e4
LT		 2708{
2709 if (in_interrupt())
5d19f546
AC		 2710 return 0; /* n_r3964 calls put_char() from interrupt context */
2711 return do_con_write(tty, &ch, 1);
1da177e4
LT		 2712}
2713
2714static int con_write_room(struct tty_struct *tty)
2715{
2716 if (tty->stopped)
2717 return 0;
a88a69c9 2718 return 32768; /* No limit, really; we're not buffering */
1da177e4
LT		 2719}
2720
2721static int con_chars_in_buffer(struct tty_struct *tty)
2722{
2723 return 0; /* we're not buffering */
2724}
2725
2726/*
2727 * con_throttle and con_unthrottle are only used for
2728 * paste_selection(), which has to stuff in a large number of
2729 * characters...
2730 */
2731static void con_throttle(struct tty_struct *tty)
2732{
2733}
2734
2735static void con_unthrottle(struct tty_struct *tty)
2736{
2737 struct vc_data *vc = tty->driver_data;
2738
2739 wake_up_interruptible(&vc->paste_wait);
2740}
2741
2742/*
2743 * Turn the Scroll-Lock LED on when the tty is stopped
2744 */
2745static void con_stop(struct tty_struct *tty)
2746{
2747 int console_num;
2748 if (!tty)
2749 return;
2750 console_num = tty->index;
2751 if (!vc_cons_allocated(console_num))
2752 return;
2753 set_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2754 set_leds();
2755}
2756
2757/*
2758 * Turn the Scroll-Lock LED off when the console is started
2759 */
2760static void con_start(struct tty_struct *tty)
2761{
2762 int console_num;
2763 if (!tty)
2764 return;
2765 console_num = tty->index;
2766 if (!vc_cons_allocated(console_num))
2767 return;
2768 clr_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2769 set_leds();
2770}
2771
2772static void con_flush_chars(struct tty_struct *tty)
2773{
2774 struct vc_data *vc;
2775
2776 if (in_interrupt()) /* from flush_to_ldisc */
2777 return;
2778
2779 /* if we race with con_close(), vt may be null */
2780 acquire_console_sem();
2781 vc = tty->driver_data;
2782 if (vc)
2783 set_cursor(vc);
2784 release_console_sem();
2785}
2786
2787/*
2788 * Allocate the console screen memory.
2789 */
2790static int con_open(struct tty_struct *tty, struct file *filp)
2791{
2792 unsigned int currcons = tty->index;
2793 int ret = 0;
2794
2795 acquire_console_sem();
f786648b 2796 if (tty->driver_data == NULL) {
1da177e4
LT		 2797 ret = vc_allocate(currcons);
2798 if (ret == 0) {
2799 struct vc_data *vc = vc_cons[currcons].d;
feebed65
AC		 2800
2801 /* Still being freed */
2802 if (vc->vc_tty) {
2803 release_console_sem();
2804 return -ERESTARTSYS;
2805 }
1da177e4
LT		 2806 tty->driver_data = vc;
2807 vc->vc_tty = tty;
2808
2809 if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
2810 tty->winsize.ws_row = vc_cons[currcons].d->vc_rows;
2811 tty->winsize.ws_col = vc_cons[currcons].d->vc_cols;
2812 }
c1236d31
ST		 2813 if (vc->vc_utf)
2814 tty->termios->c_iflag |= IUTF8;
2815 else
2816 tty->termios->c_iflag &= ~IUTF8;
e0426e6a 2817 release_console_sem();
1da177e4
LT		 2818 return ret;
2819 }
2820 }
2821 release_console_sem();
2822 return ret;
2823}
2824
1da177e4
LT		 2825static void con_close(struct tty_struct *tty, struct file *filp)
2826{
feebed65
AC		 2827 /* Nothing to do - we defer to shutdown */
2828}
1da177e4 2829
feebed65
AC		 2830static void con_shutdown(struct tty_struct *tty)
2831{
2832 struct vc_data *vc = tty->driver_data;
2833 BUG_ON(vc == NULL);
2834 acquire_console_sem();
2835 vc->vc_tty = NULL;
1da177e4 2836 release_console_sem();
feebed65 2837 tty_shutdown(tty);
1da177e4
LT		 2838}
2839
fa6ce9ab
JE		 2840static int default_italic_color = 2; // green (ASCII)
2841static int default_underline_color = 3; // cyan (ASCII)
2842module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR);
2843module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR);
2844
1da177e4
LT		 2845static void vc_init(struct vc_data *vc, unsigned int rows,
2846 unsigned int cols, int do_clear)
2847{
2848 int j, k ;
2849
2850 vc->vc_cols = cols;
2851 vc->vc_rows = rows;
2852 vc->vc_size_row = cols << 1;
2853 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
2854
2855 set_origin(vc);
2856 vc->vc_pos = vc->vc_origin;
2857 reset_vc(vc);
2858 for (j=k=0; j<16; j++) {
2859 vc->vc_palette[k++] = default_red[j] ;
2860 vc->vc_palette[k++] = default_grn[j] ;
2861 vc->vc_palette[k++] = default_blu[j] ;
2862 }
2863 vc->vc_def_color = 0x07; /* white */
fa6ce9ab
JE		 2864 vc->vc_ulcolor = default_underline_color;
2865 vc->vc_itcolor = default_italic_color;
1da177e4
LT		 2866 vc->vc_halfcolor = 0x08; /* grey */
2867 init_waitqueue_head(&vc->paste_wait);
2868 reset_terminal(vc, do_clear);
2869}
2870
2871/*
2872 * This routine initializes console interrupts, and does nothing
2873 * else. If you want the screen to clear, call tty_write with
2874 * the appropriate escape-sequence.
2875 */
2876
2877static int __init con_init(void)
2878{
2879 const char *display_desc = NULL;
2880 struct vc_data *vc;
3e795de7 2881 unsigned int currcons = 0, i;
1da177e4
LT		 2882
2883 acquire_console_sem();
2884
2885 if (conswitchp)
2886 display_desc = conswitchp->con_startup();
2887 if (!display_desc) {
2888 fg_console = 0;
2889 release_console_sem();
2890 return 0;
2891 }
2892
3e795de7
AD		 2893 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2894 struct con_driver *con_driver = &registered_con_driver[i];
2895
2896 if (con_driver->con == NULL) {
2897 con_driver->con = conswitchp;
2898 con_driver->desc = display_desc;
2899 con_driver->flag = CON_DRIVER_FLAG_INIT;
2900 con_driver->first = 0;
2901 con_driver->last = MAX_NR_CONSOLES - 1;
2902 break;
2903 }
2904 }
2905
2906 for (i = 0; i < MAX_NR_CONSOLES; i++)
2907 con_driver_map[i] = conswitchp;
2908
1da177e4
LT		 2909 if (blankinterval) {
2910 blank_state = blank_normal_wait;
f324edc8 2911 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
1da177e4
LT		 2912 }
2913
1da177e4 2914 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) {
a5f4f52e 2915 vc_cons[currcons].d = vc = kzalloc(sizeof(struct vc_data), GFP_NOWAIT);
7f1f86a0 2916 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
1da177e4 2917 visual_init(vc, currcons, 1);
a5f4f52e 2918 vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_NOWAIT);
1da177e4
LT		 2919 vc_init(vc, vc->vc_rows, vc->vc_cols,
2920 currcons || !vc->vc_sw->con_save_screen);
2921 }
2922 currcons = fg_console = 0;
2923 master_display_fg = vc = vc_cons[currcons].d;
2924 set_origin(vc);
2925 save_screen(vc);
2926 gotoxy(vc, vc->vc_x, vc->vc_y);
2927 csi_J(vc, 0);
2928 update_screen(vc);
2929 printk("Console: %s %s %dx%d",
2930 vc->vc_can_do_color ? "colour" : "mono",
2931 display_desc, vc->vc_cols, vc->vc_rows);
2932 printable = 1;
2933 printk("\n");
2934
2935 release_console_sem();
2936
2937#ifdef CONFIG_VT_CONSOLE
2938 register_console(&vt_console_driver);
2939#endif
2940 return 0;
2941}
2942console_initcall(con_init);
2943
b68e31d0 2944static const struct tty_operations con_ops = {
1da177e4
LT		 2945 .open = con_open,
2946 .close = con_close,
2947 .write = con_write,
2948 .write_room = con_write_room,
2949 .put_char = con_put_char,
2950 .flush_chars = con_flush_chars,
2951 .chars_in_buffer = con_chars_in_buffer,
2952 .ioctl = vt_ioctl,
e9216651
AB		 2953#ifdef CONFIG_COMPAT
2954 .compat_ioctl = vt_compat_ioctl,
2955#endif
1da177e4
LT		 2956 .stop = con_stop,
2957 .start = con_start,
2958 .throttle = con_throttle,
2959 .unthrottle = con_unthrottle,
8c9a9dd0 2960 .resize = vt_resize,
feebed65 2961 .shutdown = con_shutdown
1da177e4
LT		 2962};
2963
d81ed103
AC		 2964static struct cdev vc0_cdev;
2965
2966int __init vty_init(const struct file_operations *console_fops)
1da177e4 2967{
d81ed103
AC		 2968 cdev_init(&vc0_cdev, console_fops);
2969 if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) ||
2970 register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0)
2971 panic("Couldn't register /dev/tty0 driver\n");
2972 device_create(tty_class, NULL, MKDEV(TTY_MAJOR, 0), NULL, "tty0");
2973
1da177e4
LT		 2974 vcs_init();
2975
2976 console_driver = alloc_tty_driver(MAX_NR_CONSOLES);
2977 if (!console_driver)
2978 panic("Couldn't allocate console driver\n");
2979 console_driver->owner = THIS_MODULE;
1da177e4
LT		 2980 console_driver->name = "tty";
2981 console_driver->name_base = 1;
2982 console_driver->major = TTY_MAJOR;
2983 console_driver->minor_start = 1;
2984 console_driver->type = TTY_DRIVER_TYPE_CONSOLE;
2985 console_driver->init_termios = tty_std_termios;
c1236d31
ST		 2986 if (default_utf8)
2987 console_driver->init_termios.c_iflag |= IUTF8;
1da177e4
LT		 2988 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS;
2989 tty_set_operations(console_driver, &con_ops);
2990 if (tty_register_driver(console_driver))
2991 panic("Couldn't register console driver\n");
1da177e4
LT		 2992 kbd_init();
2993 console_map_init();
1da177e4
LT		 2994#ifdef CONFIG_MDA_CONSOLE
2995 mda_console_init();
2996#endif
2997 return 0;
2998}
2999
3000#ifndef VT_SINGLE_DRIVER
6db4063c
AD		 3001
3002static struct class *vtconsole_class;
3003
b7269dd2
JB		 3004static int bind_con_driver(const struct consw *csw, int first, int last,
3005 int deflt)
1da177e4 3006{
3e795de7
AD		 3007 struct module *owner = csw->owner;
3008 const char *desc = NULL;
3009 struct con_driver *con_driver;
3010 int i, j = -1, k = -1, retval = -ENODEV;
1da177e4 3011
1da177e4
LT		 3012 if (!try_module_get(owner))
3013 return -ENODEV;
3014
1c8ce271 3015 acquire_console_sem();
1c8ce271 3016
3e795de7
AD		 3017 /* check if driver is registered */
3018 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3019 con_driver = &registered_con_driver[i];
3020
3021 if (con_driver->con == csw) {
3022 desc = con_driver->desc;
3023 retval = 0;
3024 break;
3025 }
3026 }
3027
3028 if (retval)
3029 goto err;
3030
3031 if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) {
3032 csw->con_startup();
3033 con_driver->flag |= CON_DRIVER_FLAG_INIT;
1da177e4 3034 }
1c8ce271 3035
1da177e4
LT		 3036 if (deflt) {
3037 if (conswitchp)
3038 module_put(conswitchp->owner);
1c8ce271 3039
1da177e4
LT		 3040 __module_get(owner);
3041 conswitchp = csw;
3042 }
3043
3e795de7
AD		 3044 first = max(first, con_driver->first);
3045 last = min(last, con_driver->last);
3046
1da177e4
LT		 3047 for (i = first; i <= last; i++) {
3048 int old_was_color;
3049 struct vc_data *vc = vc_cons[i].d;
3050
3051 if (con_driver_map[i])
3052 module_put(con_driver_map[i]->owner);
3053 __module_get(owner);
3054 con_driver_map[i] = csw;
3055
3056 if (!vc || !vc->vc_sw)
3057 continue;
3058
3059 j = i;
1c8ce271 3060
4ee1acce
DH		 3061 if (CON_IS_VISIBLE(vc)) {
3062 k = i;
1da177e4 3063 save_screen(vc);
4ee1acce
DH		 3064 }
3065
1da177e4
LT		 3066 old_was_color = vc->vc_can_do_color;
3067 vc->vc_sw->con_deinit(vc);
02f0777a 3068 if (!vc->vc_origin)
3069 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
1da177e4 3070 visual_init(vc, i, 0);
1c8ce271 3071 set_origin(vc);
1da177e4
LT		 3072 update_attr(vc);
3073
3074 /* If the console changed between mono <-> color, then
3075 * the attributes in the screenbuf will be wrong. The
3076 * following resets all attributes to something sane.
3077 */
3078 if (old_was_color != vc->vc_can_do_color)
3079 clear_buffer_attributes(vc);
1da177e4 3080 }
4ee1acce 3081
1da177e4
LT		 3082 printk("Console: switching ");
3083 if (!deflt)
3084 printk("consoles %d-%d ", first+1, last+1);
4ee1acce
DH		 3085 if (j >= 0) {
3086 struct vc_data *vc = vc_cons[j].d;
3087
1da177e4 3088 printk("to %s %s %dx%d\n",
4ee1acce
DH		 3089 vc->vc_can_do_color ? "colour" : "mono",
3090 desc, vc->vc_cols, vc->vc_rows);
3091
3092 if (k >= 0) {
3093 vc = vc_cons[k].d;
3094 update_screen(vc);
3095 }
3096 } else
1da177e4
LT		 3097 printk("to %s\n", desc);
3098
3e795de7
AD		 3099 retval = 0;
3100err:
1da177e4 3101 release_console_sem();
1da177e4 3102 module_put(owner);
3e795de7
AD		 3103 return retval;
3104};
1da177e4 3105
13ae6645
AD		 3106#ifdef CONFIG_VT_HW_CONSOLE_BINDING
3107static int con_is_graphics(const struct consw *csw, int first, int last)
3108{
3109 int i, retval = 0;
3110
3111 for (i = first; i <= last; i++) {
3112 struct vc_data *vc = vc_cons[i].d;
3113
3114 if (vc && vc->vc_mode == KD_GRAPHICS) {
3115 retval = 1;
3116 break;
3117 }
3118 }
3119
3120 return retval;
3121}
3122
b7269dd2
JB		 3123/**
3124 * unbind_con_driver - unbind a console driver
3125 * @csw: pointer to console driver to unregister
3126 * @first: first in range of consoles that @csw should be unbound from
3127 * @last: last in range of consoles that @csw should be unbound from
3128 * @deflt: should next bound console driver be default after @csw is unbound?
3129 *
3130 * To unbind a driver from all possible consoles, pass 0 as @first and
3131 * %MAX_NR_CONSOLES as @last.
3132 *
3133 * @deflt controls whether the console that ends up replacing @csw should be
3134 * the default console.
3135 *
3136 * RETURNS:
3137 * -ENODEV if @csw isn't a registered console driver or can't be unregistered
3138 * or 0 on success.
3139 */
623e71b0 3140int unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
1da177e4 3141{
3e795de7
AD		 3142 struct module *owner = csw->owner;
3143 const struct consw *defcsw = NULL;
3144 struct con_driver *con_driver = NULL, *con_back = NULL;
3145 int i, retval = -ENODEV;
1da177e4 3146
3e795de7
AD		 3147 if (!try_module_get(owner))
3148 return -ENODEV;
3149
3150 acquire_console_sem();
3151
3152 /* check if driver is registered and if it is unbindable */
3153 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3154 con_driver = &registered_con_driver[i];
3155
3156 if (con_driver->con == csw &&
6db4063c 3157 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3e795de7
AD		 3158 retval = 0;
3159 break;
3160 }
3161 }
3162
3163 if (retval) {
3164 release_console_sem();
3165 goto err;
3166 }
3167
6db4063c
AD		 3168 retval = -ENODEV;
3169
3e795de7
AD		 3170 /* check if backup driver exists */
3171 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3172 con_back = &registered_con_driver[i];
3173
3174 if (con_back->con &&
6db4063c 3175 !(con_back->flag & CON_DRIVER_FLAG_MODULE)) {
3e795de7
AD		 3176 defcsw = con_back->con;
3177 retval = 0;
3178 break;
3179 }
3180 }
3181
3182 if (retval) {
3183 release_console_sem();
3184 goto err;
3185 }
3186
3187 if (!con_is_bound(csw)) {
3188 release_console_sem();
3189 goto err;
3190 }
3191
3192 first = max(first, con_driver->first);
3193 last = min(last, con_driver->last);
3194
3195 for (i = first; i <= last; i++) {
1da177e4
LT		 3196 if (con_driver_map[i] == csw) {
3197 module_put(csw->owner);
3198 con_driver_map[i] = NULL;
3199 }
3e795de7
AD		 3200 }
3201
3202 if (!con_is_bound(defcsw)) {
6db4063c
AD		 3203 const struct consw *defconsw = conswitchp;
3204
3e795de7
AD		 3205 defcsw->con_startup();
3206 con_back->flag |= CON_DRIVER_FLAG_INIT;
6db4063c
AD		 3207 /*
3208 * vgacon may change the default driver to point
3209 * to dummycon, we restore it here...
3210 */
3211 conswitchp = defconsw;
3e795de7
AD		 3212 }
3213
3214 if (!con_is_bound(csw))
3215 con_driver->flag &= ~CON_DRIVER_FLAG_INIT;
3216
3217 release_console_sem();
6db4063c
AD		 3218 /* ignore return value, binding should not fail */
3219 bind_con_driver(defcsw, first, last, deflt);
3e795de7
AD		 3220err:
3221 module_put(owner);
3222 return retval;
3223
3224}
623e71b0 3225EXPORT_SYMBOL(unbind_con_driver);
3e795de7 3226
6db4063c
AD		 3227static int vt_bind(struct con_driver *con)
3228{
3229 const struct consw *defcsw = NULL, *csw = NULL;
3230 int i, more = 1, first = -1, last = -1, deflt = 0;
3231
3232 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3233 con_is_graphics(con->con, con->first, con->last))
3234 goto err;
3235
3236 csw = con->con;
3237
3238 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3239 struct con_driver *con = &registered_con_driver[i];
3240
3241 if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) {
3242 defcsw = con->con;
3243 break;
3244 }
3245 }
3246
3247 if (!defcsw)
3248 goto err;
3249
3250 while (more) {
3251 more = 0;
3252
3253 for (i = con->first; i <= con->last; i++) {
3254 if (con_driver_map[i] == defcsw) {
3255 if (first == -1)
3256 first = i;
3257 last = i;
3258 more = 1;
3259 } else if (first != -1)
3260 break;
3261 }
3262
3263 if (first == 0 && last == MAX_NR_CONSOLES -1)
3264 deflt = 1;
3265
3266 if (first != -1)
3267 bind_con_driver(csw, first, last, deflt);
3268
3269 first = -1;
3270 last = -1;
3271 deflt = 0;
3272 }
3273
3274err:
3275 return 0;
3276}
3277
3278static int vt_unbind(struct con_driver *con)
3279{
3280 const struct consw *csw = NULL;
3281 int i, more = 1, first = -1, last = -1, deflt = 0;
3282
3283 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3284 con_is_graphics(con->con, con->first, con->last))
3285 goto err;
3286
3287 csw = con->con;
3288
3289 while (more) {
3290 more = 0;
3291
3292 for (i = con->first; i <= con->last; i++) {
3293 if (con_driver_map[i] == csw) {
3294 if (first == -1)
3295 first = i;
3296 last = i;
3297 more = 1;
3298 } else if (first != -1)
3299 break;
3300 }
3301
3302 if (first == 0 && last == MAX_NR_CONSOLES -1)
3303 deflt = 1;
3304
3305 if (first != -1)
3306 unbind_con_driver(csw, first, last, deflt);
3307
3308 first = -1;
3309 last = -1;
3310 deflt = 0;
3311 }
3312
3313err:
3314 return 0;
3315}
13ae6645
AD		 3316#else
3317static inline int vt_bind(struct con_driver *con)
3318{
3319 return 0;
3320}
3321static inline int vt_unbind(struct con_driver *con)
3322{
3323 return 0;
3324}
3325#endif /* CONFIG_VT_HW_CONSOLE_BINDING */
6db4063c 3326
805952a8 3327static ssize_t store_bind(struct device *dev, struct device_attribute *attr,
6db4063c
AD		 3328 const char *buf, size_t count)
3329{
805952a8 3330 struct con_driver *con = dev_get_drvdata(dev);
6db4063c
AD		 3331 int bind = simple_strtoul(buf, NULL, 0);
3332
3333 if (bind)
3334 vt_bind(con);
3335 else
3336 vt_unbind(con);
3337
3338 return count;
3339}
3340
805952a8
GKH		 3341static ssize_t show_bind(struct device *dev, struct device_attribute *attr,
3342 char *buf)
6db4063c 3343{
805952a8 3344 struct con_driver *con = dev_get_drvdata(dev);
6db4063c
AD		 3345 int bind = con_is_bound(con->con);
3346
3347 return snprintf(buf, PAGE_SIZE, "%i\n", bind);
3348}
3349
805952a8
GKH		 3350static ssize_t show_name(struct device *dev, struct device_attribute *attr,
3351 char *buf)
6db4063c 3352{
805952a8 3353 struct con_driver *con = dev_get_drvdata(dev);
6db4063c
AD		 3354
3355 return snprintf(buf, PAGE_SIZE, "%s %s\n",
3356 (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)",
3357 con->desc);
3358
3359}
3360
805952a8 3361static struct device_attribute device_attrs[] = {
6db4063c
AD		 3362 __ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind),
3363 __ATTR(name, S_IRUGO, show_name, NULL),
3364};
3365
805952a8 3366static int vtconsole_init_device(struct con_driver *con)
6db4063c
AD		 3367{
3368 int i;
928e964f 3369 int error = 0;
6db4063c 3370
928e964f 3371 con->flag |= CON_DRIVER_FLAG_ATTR;
805952a8
GKH		 3372 dev_set_drvdata(con->dev, con);
3373 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3374 error = device_create_file(con->dev, &device_attrs[i]);
928e964f
AD		 3375 if (error)
3376 break;
3377 }
6db4063c 3378
928e964f
AD		 3379 if (error) {
3380 while (--i >= 0)
805952a8 3381 device_remove_file(con->dev, &device_attrs[i]);
928e964f
AD		 3382 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3383 }
3384
3385 return error;
6db4063c
AD		 3386}
3387
805952a8 3388static void vtconsole_deinit_device(struct con_driver *con)
6db4063c
AD		 3389{
3390 int i;
3391
928e964f 3392 if (con->flag & CON_DRIVER_FLAG_ATTR) {
805952a8
GKH		 3393 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3394 device_remove_file(con->dev, &device_attrs[i]);
928e964f
AD		 3395 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3396 }
6db4063c
AD		 3397}
3398
3e795de7
AD		 3399/**
3400 * con_is_bound - checks if driver is bound to the console
3401 * @csw: console driver
3402 *
3403 * RETURNS: zero if unbound, nonzero if bound
3404 *
3405 * Drivers can call this and if zero, they should release
3406 * all resources allocated on con_startup()
3407 */
3408int con_is_bound(const struct consw *csw)
3409{
3410 int i, bound = 0;
3411
3412 for (i = 0; i < MAX_NR_CONSOLES; i++) {
3413 if (con_driver_map[i] == csw) {
3414 bound = 1;
3415 break;
3416 }
3417 }
3418
3419 return bound;
3420}
3421EXPORT_SYMBOL(con_is_bound);
3422
b45cfba4
JB		 3423/**
3424 * con_debug_enter - prepare the console for the kernel debugger
3425 * @sw: console driver
3426 *
3427 * Called when the console is taken over by the kernel debugger, this
3428 * function needs to save the current console state, then put the console
3429 * into a state suitable for the kernel debugger.
3430 *
3431 * RETURNS:
3432 * Zero on success, nonzero if a failure occurred when trying to prepare
3433 * the console for the debugger.
3434 */
3435int con_debug_enter(struct vc_data *vc)
3436{
3437 int ret = 0;
3438
3439 saved_fg_console = fg_console;
3440 saved_last_console = last_console;
3441 saved_want_console = want_console;
3442 saved_vc_mode = vc->vc_mode;
3443 vc->vc_mode = KD_TEXT;
3444 console_blanked = 0;
3445 if (vc->vc_sw->con_debug_enter)
3446 ret = vc->vc_sw->con_debug_enter(vc);
81d44507
JW		 3447#ifdef CONFIG_KGDB_KDB
3448 /* Set the initial LINES variable if it is not already set */
3449 if (vc->vc_rows < 999) {
3450 int linecount;
3451 char lns[4];
3452 const char *setargs[3] = {
3453 "set",
3454 "LINES",
3455 lns,
3456 };
3457 if (kdbgetintenv(setargs[0], &linecount)) {
3458 snprintf(lns, 4, "%i", vc->vc_rows);
3459 kdb_set(2, setargs);
3460 }
3461 }
3462#endif /* CONFIG_KGDB_KDB */
b45cfba4
JB		 3463 return ret;
3464}
3465EXPORT_SYMBOL_GPL(con_debug_enter);
3466
3467/**
3468 * con_debug_leave - restore console state
3469 * @sw: console driver
3470 *
3471 * Restore the console state to what it was before the kernel debugger
3472 * was invoked.
3473 *
3474 * RETURNS:
3475 * Zero on success, nonzero if a failure occurred when trying to restore
3476 * the console.
3477 */
3478int con_debug_leave(void)
3479{
3480 struct vc_data *vc;
3481 int ret = 0;
3482
3483 fg_console = saved_fg_console;
3484 last_console = saved_last_console;
3485 want_console = saved_want_console;
3486 vc_cons[fg_console].d->vc_mode = saved_vc_mode;
3487
3488 vc = vc_cons[fg_console].d;
3489 if (vc->vc_sw->con_debug_leave)
3490 ret = vc->vc_sw->con_debug_leave(vc);
3491 return ret;
3492}
3493EXPORT_SYMBOL_GPL(con_debug_leave);
3494
3e795de7
AD		 3495/**
3496 * register_con_driver - register console driver to console layer
3497 * @csw: console driver
3498 * @first: the first console to take over, minimum value is 0
3499 * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1
3500 *
3501 * DESCRIPTION: This function registers a console driver which can later
3502 * bind to a range of consoles specified by @first and @last. It will
3503 * also initialize the console driver by calling con_startup().
3504 */
3505int register_con_driver(const struct consw *csw, int first, int last)
3506{
3507 struct module *owner = csw->owner;
3508 struct con_driver *con_driver;
3509 const char *desc;
3510 int i, retval = 0;
3511
3512 if (!try_module_get(owner))
3513 return -ENODEV;
3514
3515 acquire_console_sem();
3516
3517 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3518 con_driver = &registered_con_driver[i];
3519
3520 /* already registered */
3521 if (con_driver->con == csw)
3522 retval = -EINVAL;
3523 }
3524
3525 if (retval)
3526 goto err;
3527
3528 desc = csw->con_startup();
3529
3530 if (!desc)
3531 goto err;
3532
3533 retval = -EINVAL;
3534
3535 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3536 con_driver = &registered_con_driver[i];
3537
3538 if (con_driver->con == NULL) {
3539 con_driver->con = csw;
3540 con_driver->desc = desc;
6db4063c
AD		 3541 con_driver->node = i;
3542 con_driver->flag = CON_DRIVER_FLAG_MODULE |
3e795de7
AD		 3543 CON_DRIVER_FLAG_INIT;
3544 con_driver->first = first;
3545 con_driver->last = last;
3546 retval = 0;
3547 break;
3548 }
3549 }
3550
6db4063c
AD		 3551 if (retval)
3552 goto err;
3553
d81ed103 3554 con_driver->dev = device_create(vtconsole_class, NULL,
47aa5793
GKH		 3555 MKDEV(0, con_driver->node),
3556 NULL, "vtcon%i",
3557 con_driver->node);
6db4063c 3558
805952a8
GKH		 3559 if (IS_ERR(con_driver->dev)) {
3560 printk(KERN_WARNING "Unable to create device for %s; "
6db4063c 3561 "errno = %ld\n", con_driver->desc,
805952a8
GKH		 3562 PTR_ERR(con_driver->dev));
3563 con_driver->dev = NULL;
6db4063c 3564 } else {
805952a8 3565 vtconsole_init_device(con_driver);
6db4063c 3566 }
928e964f 3567
3e795de7
AD		 3568err:
3569 release_console_sem();
3570 module_put(owner);
3571 return retval;
3572}
3573EXPORT_SYMBOL(register_con_driver);
3574
3575/**
3576 * unregister_con_driver - unregister console driver from console layer
3577 * @csw: console driver
3578 *
3579 * DESCRIPTION: All drivers that registers to the console layer must
3580 * call this function upon exit, or if the console driver is in a state
3581 * where it won't be able to handle console services, such as the
3582 * framebuffer console without loaded framebuffer drivers.
3583 *
3584 * The driver must unbind first prior to unregistration.
3585 */
3586int unregister_con_driver(const struct consw *csw)
3587{
3588 int i, retval = -ENODEV;
3589
3590 acquire_console_sem();
3591
3592 /* cannot unregister a bound driver */
3593 if (con_is_bound(csw))
3594 goto err;
3595
3596 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3597 struct con_driver *con_driver = &registered_con_driver[i];
3598
3599 if (con_driver->con == csw &&
6db4063c 3600 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
805952a8
GKH		 3601 vtconsole_deinit_device(con_driver);
3602 device_destroy(vtconsole_class,
3603 MKDEV(0, con_driver->node));
3e795de7
AD		 3604 con_driver->con = NULL;
3605 con_driver->desc = NULL;
805952a8 3606 con_driver->dev = NULL;
6db4063c 3607 con_driver->node = 0;
3e795de7
AD		 3608 con_driver->flag = 0;
3609 con_driver->first = 0;
3610 con_driver->last = 0;
3611 retval = 0;
3612 break;
3613 }
3614 }
3e795de7
AD		 3615err:
3616 release_console_sem();
3617 return retval;
3618}
3619EXPORT_SYMBOL(unregister_con_driver);
3620
3621/*
3622 * If we support more console drivers, this function is used
3623 * when a driver wants to take over some existing consoles
3624 * and become default driver for newly opened ones.
3625 *
3626 * take_over_console is basically a register followed by unbind
3627 */
3628int take_over_console(const struct consw *csw, int first, int last, int deflt)
3629{
3630 int err;
3631
3632 err = register_con_driver(csw, first, last);
3633
3634 if (!err)
6db4063c 3635 bind_con_driver(csw, first, last, deflt);
3e795de7
AD		 3636
3637 return err;
3638}
3639
3640/*
3641 * give_up_console is a wrapper to unregister_con_driver. It will only
3642 * work if driver is fully unbound.
3643 */
3644void give_up_console(const struct consw *csw)
3645{
3646 unregister_con_driver(csw);
3647}
3648
6db4063c 3649static int __init vtconsole_class_init(void)
3e795de7 3650{
6db4063c 3651 int i;
3e795de7 3652
6db4063c
AD		 3653 vtconsole_class = class_create(THIS_MODULE, "vtconsole");
3654 if (IS_ERR(vtconsole_class)) {
3655 printk(KERN_WARNING "Unable to create vt console class; "
3656 "errno = %ld\n", PTR_ERR(vtconsole_class));
3657 vtconsole_class = NULL;
3658 }
3e795de7 3659
6db4063c 3660 /* Add system drivers to sysfs */
3e795de7
AD		 3661 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3662 struct con_driver *con = &registered_con_driver[i];
3663
805952a8 3664 if (con->con && !con->dev) {
d81ed103 3665 con->dev = device_create(vtconsole_class, NULL,
47aa5793
GKH		 3666 MKDEV(0, con->node),
3667 NULL, "vtcon%i",
3668 con->node);
6db4063c 3669
805952a8 3670 if (IS_ERR(con->dev)) {
6db4063c 3671 printk(KERN_WARNING "Unable to create "
805952a8
GKH		 3672 "device for %s; errno = %ld\n",
3673 con->desc, PTR_ERR(con->dev));
3674 con->dev = NULL;
6db4063c 3675 } else {
805952a8 3676 vtconsole_init_device(con);
6db4063c 3677 }
3e795de7 3678 }
3e795de7
AD		 3679 }
3680
3e795de7
AD		 3681 return 0;
3682}
6db4063c 3683postcore_initcall(vtconsole_class_init);
3e795de7 3684
1da177e4
LT		 3685#endif
3686
3687/*
3688 * Screen blanking
3689 */
3690
403aac96 3691static int set_vesa_blanking(char __user *p)
1da177e4 3692{
403aac96
YY		 3693 unsigned int mode;
3694
3695 if (get_user(mode, p + 1))
3696 return -EFAULT;
3697
3698 vesa_blank_mode = (mode < 4) ? mode : 0;
3699 return 0;
1da177e4
LT		 3700}
3701
1da177e4
LT		 3702void do_blank_screen(int entering_gfx)
3703{
3704 struct vc_data *vc = vc_cons[fg_console].d;
3705 int i;
3706
3707 WARN_CONSOLE_UNLOCKED();
3708
3709 if (console_blanked) {
3710 if (blank_state == blank_vesa_wait) {
3711 blank_state = blank_off;
d060a321 3712 vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0);
1da177e4
LT		 3713 }
3714 return;
3715 }
1da177e4
LT		 3716
3717 /* entering graphics mode? */
3718 if (entering_gfx) {
3719 hide_cursor(vc);
3720 save_screen(vc);
3721 vc->vc_sw->con_blank(vc, -1, 1);
3722 console_blanked = fg_console + 1;
b6e8f00f 3723 blank_state = blank_off;
1da177e4
LT		 3724 set_origin(vc);
3725 return;
3726 }
3727
b6e8f00f 3728 if (blank_state != blank_normal_wait)
3729 return;
3730 blank_state = blank_off;
3731
1da177e4
LT		 3732 /* don't blank graphics */
3733 if (vc->vc_mode != KD_TEXT) {
3734 console_blanked = fg_console + 1;
3735 return;
3736 }
3737
3738 hide_cursor(vc);
3739 del_timer_sync(&console_timer);
3740 blank_timer_expired = 0;
3741
3742 save_screen(vc);
3743 /* In case we need to reset origin, blanking hook returns 1 */
d060a321 3744 i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0);
1da177e4
LT		 3745 console_blanked = fg_console + 1;
3746 if (i)
3747 set_origin(vc);
3748
3749 if (console_blank_hook && console_blank_hook(1))
3750 return;
3751
d060a321 3752 if (vesa_off_interval && vesa_blank_mode) {
030babac 3753 blank_state = blank_vesa_wait;
1da177e4
LT		 3754 mod_timer(&console_timer, jiffies + vesa_off_interval);
3755 }
8b92e87d 3756 vt_event_post(VT_EVENT_BLANK, vc->vc_num, vc->vc_num);
1da177e4
LT		 3757}
3758EXPORT_SYMBOL(do_blank_screen);
3759
3760/*
3761 * Called by timer as well as from vt_console_driver
3762 */
3763void do_unblank_screen(int leaving_gfx)
3764{
3765 struct vc_data *vc;
3766
3767 /* This should now always be called from a "sane" (read: can schedule)
3768 * context for the sake of the low level drivers, except in the special
3769 * case of oops_in_progress
3770 */
3771 if (!oops_in_progress)
3772 might_sleep();
3773
3774 WARN_CONSOLE_UNLOCKED();
3775
3776 ignore_poke = 0;
3777 if (!console_blanked)
3778 return;
3779 if (!vc_cons_allocated(fg_console)) {
3780 /* impossible */
3781 printk("unblank_screen: tty %d not allocated ??\n", fg_console+1);
3782 return;
3783 }
3784 vc = vc_cons[fg_console].d;
3785 if (vc->vc_mode != KD_TEXT)
3786 return; /* but leave console_blanked != 0 */
3787
3788 if (blankinterval) {
f324edc8 3789 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
1da177e4
LT		 3790 blank_state = blank_normal_wait;
3791 }
3792
3793 console_blanked = 0;
3794 if (vc->vc_sw->con_blank(vc, 0, leaving_gfx))
3795 /* Low-level driver cannot restore -> do it ourselves */
3796 update_screen(vc);
3797 if (console_blank_hook)
3798 console_blank_hook(0);
3799 set_palette(vc);
3800 set_cursor(vc);
8b92e87d 3801 vt_event_post(VT_EVENT_UNBLANK, vc->vc_num, vc->vc_num);
1da177e4
LT		 3802}
3803EXPORT_SYMBOL(do_unblank_screen);
3804
3805/*
3806 * This is called by the outside world to cause a forced unblank, mostly for
3807 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
3808 * call it with 1 as an argument and so force a mode restore... that may kill
3809 * X or at least garbage the screen but would also make the Oops visible...
3810 */
3811void unblank_screen(void)
3812{
3813 do_unblank_screen(0);
3814}
3815
3816/*
70522e12 3817 * We defer the timer blanking to work queue so it can take the console mutex
1da177e4 3818 * (console operations can still happen at irq time, but only from printk which
70522e12 3819 * has the console mutex. Not perfect yet, but better than no locking
1da177e4
LT		 3820 */
3821static void blank_screen_t(unsigned long dummy)
3822{
cc63b1e1 3823 if (unlikely(!keventd_up())) {
f324edc8 3824 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
cc63b1e1
JB		 3825 return;
3826 }
1da177e4
LT		 3827 blank_timer_expired = 1;
3828 schedule_work(&console_work);
3829}
3830
3831void poke_blanked_console(void)
3832{
3833 WARN_CONSOLE_UNLOCKED();
3834
3835 /* Add this so we quickly catch whoever might call us in a non
3836 * safe context. Nowadays, unblank_screen() isn't to be called in
3837 * atomic contexts and is allowed to schedule (with the special case
3838 * of oops_in_progress, but that isn't of any concern for this
3839 * function. --BenH.
3840 */
3841 might_sleep();
3842
3843 /* This isn't perfectly race free, but a race here would be mostly harmless,
3844 * at worse, we'll do a spurrious blank and it's unlikely
3845 */
3846 del_timer(&console_timer);
3847 blank_timer_expired = 0;
3848
3849 if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS)
3850 return;
3851 if (console_blanked)
3852 unblank_screen();
3853 else if (blankinterval) {
f324edc8 3854 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
1da177e4
LT		 3855 blank_state = blank_normal_wait;
3856 }
3857}
3858
3859/*
3860 * Palettes
3861 */
3862
3863static void set_palette(struct vc_data *vc)
3864{
3865 WARN_CONSOLE_UNLOCKED();
3866
3867 if (vc->vc_mode != KD_GRAPHICS)
3868 vc->vc_sw->con_set_palette(vc, color_table);
3869}
3870
3871static int set_get_cmap(unsigned char __user *arg, int set)
3872{
3873 int i, j, k;
3874
3875 WARN_CONSOLE_UNLOCKED();
3876
3877 for (i = 0; i < 16; i++)
3878 if (set) {
3879 get_user(default_red[i], arg++);
3880 get_user(default_grn[i], arg++);
3881 get_user(default_blu[i], arg++);
3882 } else {
3883 put_user(default_red[i], arg++);
3884 put_user(default_grn[i], arg++);
3885 put_user(default_blu[i], arg++);
3886 }
3887 if (set) {
3888 for (i = 0; i < MAX_NR_CONSOLES; i++)
3889 if (vc_cons_allocated(i)) {
3890 for (j = k = 0; j < 16; j++) {
3891 vc_cons[i].d->vc_palette[k++] = default_red[j];
3892 vc_cons[i].d->vc_palette[k++] = default_grn[j];
3893 vc_cons[i].d->vc_palette[k++] = default_blu[j];
3894 }
3895 set_palette(vc_cons[i].d);
3896 }
3897 }
3898 return 0;
3899}
3900
3901/*
3902 * Load palette into the DAC registers. arg points to a colour
3903 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
3904 */
3905
3906int con_set_cmap(unsigned char __user *arg)
3907{
3908 int rc;
3909
3910 acquire_console_sem();
3911 rc = set_get_cmap (arg,1);
3912 release_console_sem();
3913
3914 return rc;
3915}
3916
3917int con_get_cmap(unsigned char __user *arg)
3918{
3919 int rc;
3920
3921 acquire_console_sem();
3922 rc = set_get_cmap (arg,0);
3923 release_console_sem();
3924
3925 return rc;
3926}
3927
3928void reset_palette(struct vc_data *vc)
3929{
3930 int j, k;
3931 for (j=k=0; j<16; j++) {
3932 vc->vc_palette[k++] = default_red[j];
3933 vc->vc_palette[k++] = default_grn[j];
3934 vc->vc_palette[k++] = default_blu[j];
3935 }
3936 set_palette(vc);
3937}
3938
3939/*
3940 * Font switching
3941 *
3942 * Currently we only support fonts up to 32 pixels wide, at a maximum height
3943 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
3944 * depending on width) reserved for each character which is kinda wasty, but
3945 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
3946 * is upto the actual low-level console-driver convert data into its favorite
3947 * format (maybe we should add a `fontoffset' field to the `display'
3948 * structure so we won't have to convert the fontdata all the time.
3949 * /Jes
3950 */
3951
3952#define max_font_size 65536
3953
3954static int con_font_get(struct vc_data *vc, struct console_font_op *op)
3955{
3956 struct console_font font;
3957 int rc = -EINVAL;
3958 int c;
3959
3960 if (vc->vc_mode != KD_TEXT)
3961 return -EINVAL;
3962
3963 if (op->data) {
3964 font.data = kmalloc(max_font_size, GFP_KERNEL);
3965 if (!font.data)
3966 return -ENOMEM;
3967 } else
3968 font.data = NULL;
3969
3970 acquire_console_sem();
3971 if (vc->vc_sw->con_font_get)
3972 rc = vc->vc_sw->con_font_get(vc, &font);
3973 else
3974 rc = -ENOSYS;
3975 release_console_sem();
3976
3977 if (rc)
3978 goto out;
3979
3980 c = (font.width+7)/8 * 32 * font.charcount;
04f378b1 3981
1da177e4
LT		 3982 if (op->data && font.charcount > op->charcount)
3983 rc = -ENOSPC;
3984 if (!(op->flags & KD_FONT_FLAG_OLD)) {
3985 if (font.width > op->width || font.height > op->height)
3986 rc = -ENOSPC;
3987 } else {
3988 if (font.width != 8)
3989 rc = -EIO;
3990 else if ((op->height && font.height > op->height) ||
3991 font.height > 32)
3992 rc = -ENOSPC;
3993 }
3994 if (rc)
3995 goto out;
3996
3997 op->height = font.height;
3998 op->width = font.width;
3999 op->charcount = font.charcount;
4000
4001 if (op->data && copy_to_user(op->data, font.data, c))
4002 rc = -EFAULT;
4003
4004out:
4005 kfree(font.data);
4006 return rc;
4007}
4008
4009static int con_font_set(struct vc_data *vc, struct console_font_op *op)
4010{
4011 struct console_font font;
4012 int rc = -EINVAL;
4013 int size;
4014
4015 if (vc->vc_mode != KD_TEXT)
4016 return -EINVAL;
4017 if (!op->data)
4018 return -EINVAL;
4019 if (op->charcount > 512)
4020 return -EINVAL;
4021 if (!op->height) { /* Need to guess font height [compat] */
4022 int h, i;
4023 u8 __user *charmap = op->data;
4024 u8 tmp;
4025
4026 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
4027 so that we can get rid of this soon */
4028 if (!(op->flags & KD_FONT_FLAG_OLD))
4029 return -EINVAL;
4030 for (h = 32; h > 0; h--)
4031 for (i = 0; i < op->charcount; i++) {
4032 if (get_user(tmp, &charmap[32*i+h-1]))
4033 return -EFAULT;
4034 if (tmp)
4035 goto nonzero;
4036 }
4037 return -EINVAL;
4038 nonzero:
4039 op->height = h;
4040 }
4041 if (op->width <= 0 || op->width > 32 || op->height > 32)
4042 return -EINVAL;
4043 size = (op->width+7)/8 * 32 * op->charcount;
4044 if (size > max_font_size)
4045 return -ENOSPC;
4046 font.charcount = op->charcount;
4047 font.height = op->height;
4048 font.width = op->width;
9b71ca20
JL		 4049 font.data = memdup_user(op->data, size);
4050 if (IS_ERR(font.data))
4051 return PTR_ERR(font.data);
1da177e4
LT		 4052 acquire_console_sem();
4053 if (vc->vc_sw->con_font_set)
4054 rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
4055 else
4056 rc = -ENOSYS;
4057 release_console_sem();
4058 kfree(font.data);
4059 return rc;
4060}
4061
4062static int con_font_default(struct vc_data *vc, struct console_font_op *op)
4063{
4064 struct console_font font = {.width = op->width, .height = op->height};
4065 char name[MAX_FONT_NAME];
4066 char *s = name;
4067 int rc;
4068
4069 if (vc->vc_mode != KD_TEXT)
4070 return -EINVAL;
4071
4072 if (!op->data)
4073 s = NULL;
4074 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0)
4075 return -EFAULT;
4076 else
4077 name[MAX_FONT_NAME - 1] = 0;
4078
4079 acquire_console_sem();
4080 if (vc->vc_sw->con_font_default)
4081 rc = vc->vc_sw->con_font_default(vc, &font, s);
4082 else
4083 rc = -ENOSYS;
4084 release_console_sem();
4085 if (!rc) {
4086 op->width = font.width;
4087 op->height = font.height;
4088 }
4089 return rc;
4090}
4091
4092static int con_font_copy(struct vc_data *vc, struct console_font_op *op)
4093{
4094 int con = op->height;
4095 int rc;
4096
4097 if (vc->vc_mode != KD_TEXT)
4098 return -EINVAL;
4099
4100 acquire_console_sem();
4101 if (!vc->vc_sw->con_font_copy)
4102 rc = -ENOSYS;
4103 else if (con < 0 || !vc_cons_allocated(con))
4104 rc = -ENOTTY;
4105 else if (con == vc->vc_num) /* nothing to do */
4106 rc = 0;
4107 else
4108 rc = vc->vc_sw->con_font_copy(vc, con);
4109 release_console_sem();
4110 return rc;
4111}
4112
4113int con_font_op(struct vc_data *vc, struct console_font_op *op)
4114{
4115 switch (op->op) {
4116 case KD_FONT_OP_SET:
4117 return con_font_set(vc, op);
4118 case KD_FONT_OP_GET:
4119 return con_font_get(vc, op);
4120 case KD_FONT_OP_SET_DEFAULT:
4121 return con_font_default(vc, op);
4122 case KD_FONT_OP_COPY:
4123 return con_font_copy(vc, op);
4124 }
4125 return -ENOSYS;
4126}
4127
4128/*
4129 * Interface exported to selection and vcs.
4130 */
4131
4132/* used by selection */
4133u16 screen_glyph(struct vc_data *vc, int offset)
4134{
4135 u16 w = scr_readw(screenpos(vc, offset, 1));
4136 u16 c = w & 0xff;
4137
4138 if (w & vc->vc_hi_font_mask)
4139 c |= 0x100;
4140 return c;
4141}
f7511d5f 4142EXPORT_SYMBOL_GPL(screen_glyph);
1da177e4
LT		 4143
4144/* used by vcs - note the word offset */
4145unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed)
4146{
4147 return screenpos(vc, 2 * w_offset, viewed);
4148}
4149
4150void getconsxy(struct vc_data *vc, unsigned char *p)
4151{
4152 p[0] = vc->vc_x;
4153 p[1] = vc->vc_y;
4154}
4155
4156void putconsxy(struct vc_data *vc, unsigned char *p)
4157{
9477e260 4158 hide_cursor(vc);
1da177e4
LT		 4159 gotoxy(vc, p[0], p[1]);
4160 set_cursor(vc);
4161}
4162
4163u16 vcs_scr_readw(struct vc_data *vc, const u16 *org)
4164{
4165 if ((unsigned long)org == vc->vc_pos && softcursor_original != -1)
4166 return softcursor_original;
4167 return scr_readw(org);
4168}
4169
4170void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org)
4171{
4172 scr_writew(val, org);
4173 if ((unsigned long)org == vc->vc_pos) {
4174 softcursor_original = -1;
4175 add_softcursor(vc);
4176 }
4177}
4178
4179/*
4180 * Visible symbols for modules
4181 */
4182
4183EXPORT_SYMBOL(color_table);
4184EXPORT_SYMBOL(default_red);
4185EXPORT_SYMBOL(default_grn);
4186EXPORT_SYMBOL(default_blu);
4187EXPORT_SYMBOL(update_region);
4188EXPORT_SYMBOL(redraw_screen);
4189EXPORT_SYMBOL(vc_resize);
4190EXPORT_SYMBOL(fg_console);
4191EXPORT_SYMBOL(console_blank_hook);
4192EXPORT_SYMBOL(console_blanked);
4193EXPORT_SYMBOL(vc_cons);
f6c06b68 4194EXPORT_SYMBOL(global_cursor_default);
1da177e4
LT		 4195#ifndef VT_SINGLE_DRIVER
4196EXPORT_SYMBOL(take_over_console);
4197EXPORT_SYMBOL(give_up_console);
4198#endif
Linux kernel - Deliverables
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