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[PATCH] ISDN: fix a few memory leaks in sc_ioctl()
[thirdparty/linux.git] / drivers / char / vt.c
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1da177e4
LT		 1/*
2 * linux/drivers/char/vt.c
3 *
4 * Copyright (C) 1991, 1992 Linus Torvalds
5 */
6
7/*
8 * Hopefully this will be a rather complete VT102 implementation.
9 *
10 * Beeping thanks to John T Kohl.
11 *
12 * Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics
13 * Chars, and VT100 enhancements by Peter MacDonald.
14 *
15 * Copy and paste function by Andrew Haylett,
16 * some enhancements by Alessandro Rubini.
17 *
18 * Code to check for different video-cards mostly by Galen Hunt,
19 * <g-hunt@ee.utah.edu>
20 *
21 * Rudimentary ISO 10646/Unicode/UTF-8 character set support by
22 * Markus Kuhn, <mskuhn@immd4.informatik.uni-erlangen.de>.
23 *
24 * Dynamic allocation of consoles, aeb@cwi.nl, May 1994
25 * Resizing of consoles, aeb, 940926
26 *
27 * Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94
28 * <poe@daimi.aau.dk>
29 *
30 * User-defined bell sound, new setterm control sequences and printk
31 * redirection by Martin Mares <mj@k332.feld.cvut.cz> 19-Nov-95
32 *
33 * APM screenblank bug fixed Takashi Manabe <manabe@roy.dsl.tutics.tut.jp>
34 *
35 * Merge with the abstract console driver by Geert Uytterhoeven
36 * <geert@linux-m68k.org>, Jan 1997.
37 *
38 * Original m68k console driver modifications by
39 *
40 * - Arno Griffioen <arno@usn.nl>
41 * - David Carter <carter@cs.bris.ac.uk>
42 *
43 * The abstract console driver provides a generic interface for a text
44 * console. It supports VGA text mode, frame buffer based graphical consoles
45 * and special graphics processors that are only accessible through some
46 * registers (e.g. a TMS340x0 GSP).
47 *
48 * The interface to the hardware is specified using a special structure
49 * (struct consw) which contains function pointers to console operations
50 * (see <linux/console.h> for more information).
51 *
52 * Support for changeable cursor shape
53 * by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997
54 *
55 * Ported to i386 and con_scrolldelta fixed
56 * by Emmanuel Marty <core@ggi-project.org>, April 1998
57 *
58 * Resurrected character buffers in videoram plus lots of other trickery
59 * by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998
60 *
61 * Removed old-style timers, introduced console_timer, made timer
62 * deletion SMP-safe. 17Jun00, Andrew Morton <andrewm@uow.edu.au>
63 *
64 * Removed console_lock, enabled interrupts across all console operations
65 * 13 March 2001, Andrew Morton
66 */
67
68#include <linux/module.h>
69#include <linux/types.h>
70#include <linux/sched.h>
71#include <linux/tty.h>
72#include <linux/tty_flip.h>
73#include <linux/kernel.h>
74#include <linux/string.h>
75#include <linux/errno.h>
76#include <linux/kd.h>
77#include <linux/slab.h>
78#include <linux/major.h>
79#include <linux/mm.h>
80#include <linux/console.h>
81#include <linux/init.h>
82#include <linux/devfs_fs_kernel.h>
83#include <linux/vt_kern.h>
84#include <linux/selection.h>
85#include <linux/tiocl.h>
86#include <linux/kbd_kern.h>
87#include <linux/consolemap.h>
88#include <linux/timer.h>
89#include <linux/interrupt.h>
90#include <linux/config.h>
91#include <linux/workqueue.h>
92#include <linux/bootmem.h>
93#include <linux/pm.h>
94#include <linux/font.h>
95#include <linux/bitops.h>
96
97#include <asm/io.h>
98#include <asm/system.h>
99#include <asm/uaccess.h>
100
101
102const struct consw *conswitchp;
103
104/* A bitmap for codes <32. A bit of 1 indicates that the code
105 * corresponding to that bit number invokes some special action
106 * (such as cursor movement) and should not be displayed as a
107 * glyph unless the disp_ctrl mode is explicitly enabled.
108 */
109#define CTRL_ACTION 0x0d00ff81
110#define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */
111
112/*
113 * Here is the default bell parameters: 750HZ, 1/8th of a second
114 */
115#define DEFAULT_BELL_PITCH 750
116#define DEFAULT_BELL_DURATION (HZ/8)
117
118extern void vcs_make_devfs(struct tty_struct *tty);
119extern void vcs_remove_devfs(struct tty_struct *tty);
120
121extern void console_map_init(void);
122#ifdef CONFIG_PROM_CONSOLE
123extern void prom_con_init(void);
124#endif
125#ifdef CONFIG_MDA_CONSOLE
126extern int mda_console_init(void);
127#endif
128
129struct vc vc_cons [MAX_NR_CONSOLES];
130
131#ifndef VT_SINGLE_DRIVER
132static const struct consw *con_driver_map[MAX_NR_CONSOLES];
133#endif
134
135static int con_open(struct tty_struct *, struct file *);
136static void vc_init(struct vc_data *vc, unsigned int rows,
137 unsigned int cols, int do_clear);
138static void gotoxy(struct vc_data *vc, int new_x, int new_y);
139static void save_cur(struct vc_data *vc);
140static void reset_terminal(struct vc_data *vc, int do_clear);
141static void con_flush_chars(struct tty_struct *tty);
142static void set_vesa_blanking(char __user *p);
143static void set_cursor(struct vc_data *vc);
144static void hide_cursor(struct vc_data *vc);
145static void console_callback(void *ignored);
146static void blank_screen_t(unsigned long dummy);
147static void set_palette(struct vc_data *vc);
148
149static int printable; /* Is console ready for printing? */
150
151/*
152 * ignore_poke: don't unblank the screen when things are typed. This is
153 * mainly for the privacy of braille terminal users.
154 */
155static int ignore_poke;
156
157int do_poke_blanked_console;
158int console_blanked;
159
160static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
161static int blankinterval = 10*60*HZ;
162static int vesa_off_interval;
163
164static DECLARE_WORK(console_work, console_callback, NULL);
165
166/*
167 * fg_console is the current virtual console,
168 * last_console is the last used one,
169 * want_console is the console we want to switch to,
170 * kmsg_redirect is the console for kernel messages,
171 */
172int fg_console;
173int last_console;
174int want_console = -1;
175int kmsg_redirect;
176
177/*
178 * For each existing display, we have a pointer to console currently visible
179 * on that display, allowing consoles other than fg_console to be refreshed
180 * appropriately. Unless the low-level driver supplies its own display_fg
181 * variable, we use this one for the "master display".
182 */
183static struct vc_data *master_display_fg;
184
185/*
186 * Unfortunately, we need to delay tty echo when we're currently writing to the
187 * console since the code is (and always was) not re-entrant, so we schedule
188 * all flip requests to process context with schedule-task() and run it from
189 * console_callback().
190 */
191
192/*
193 * For the same reason, we defer scrollback to the console callback.
194 */
195static int scrollback_delta;
196
197/*
198 * Hook so that the power management routines can (un)blank
199 * the console on our behalf.
200 */
201int (*console_blank_hook)(int);
202
203static struct timer_list console_timer;
204static int blank_state;
205static int blank_timer_expired;
206enum {
207 blank_off = 0,
208 blank_normal_wait,
209 blank_vesa_wait,
210};
211
212/*
213 * Low-Level Functions
214 */
215
216#define IS_FG(vc) ((vc)->vc_num == fg_console)
217
218#ifdef VT_BUF_VRAM_ONLY
219#define DO_UPDATE(vc) 0
220#else
221#define DO_UPDATE(vc) CON_IS_VISIBLE(vc)
222#endif
223
224static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed)
225{
226 unsigned short *p;
227
228 if (!viewed)
229 p = (unsigned short *)(vc->vc_origin + offset);
230 else if (!vc->vc_sw->con_screen_pos)
231 p = (unsigned short *)(vc->vc_visible_origin + offset);
232 else
233 p = vc->vc_sw->con_screen_pos(vc, offset);
234 return p;
235}
236
237static inline void scrolldelta(int lines)
238{
239 scrollback_delta += lines;
240 schedule_console_callback();
241}
242
243void schedule_console_callback(void)
244{
245 schedule_work(&console_work);
246}
247
248static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
249{
250 unsigned short *d, *s;
251
252 if (t+nr >= b)
253 nr = b - t - 1;
254 if (b > vc->vc_rows || t >= b || nr < 1)
255 return;
256 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr))
257 return;
258 d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
259 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr));
260 scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row);
261 scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_video_erase_char,
262 vc->vc_size_row * nr);
263}
264
265static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
266{
267 unsigned short *s;
268 unsigned int step;
269
270 if (t+nr >= b)
271 nr = b - t - 1;
272 if (b > vc->vc_rows || t >= b || nr < 1)
273 return;
274 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr))
275 return;
276 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
277 step = vc->vc_cols * nr;
278 scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row);
279 scr_memsetw(s, vc->vc_video_erase_char, 2 * step);
280}
281
282static void do_update_region(struct vc_data *vc, unsigned long start, int count)
283{
284#ifndef VT_BUF_VRAM_ONLY
285 unsigned int xx, yy, offset;
286 u16 *p;
287
288 p = (u16 *) start;
289 if (!vc->vc_sw->con_getxy) {
290 offset = (start - vc->vc_origin) / 2;
291 xx = offset % vc->vc_cols;
292 yy = offset / vc->vc_cols;
293 } else {
294 int nxx, nyy;
295 start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy);
296 xx = nxx; yy = nyy;
297 }
298 for(;;) {
299 u16 attrib = scr_readw(p) & 0xff00;
300 int startx = xx;
301 u16 *q = p;
302 while (xx < vc->vc_cols && count) {
303 if (attrib != (scr_readw(p) & 0xff00)) {
304 if (p > q)
305 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
306 startx = xx;
307 q = p;
308 attrib = scr_readw(p) & 0xff00;
309 }
310 p++;
311 xx++;
312 count--;
313 }
314 if (p > q)
315 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
316 if (!count)
317 break;
318 xx = 0;
319 yy++;
320 if (vc->vc_sw->con_getxy) {
321 p = (u16 *)start;
322 start = vc->vc_sw->con_getxy(vc, start, NULL, NULL);
323 }
324 }
325#endif
326}
327
328void update_region(struct vc_data *vc, unsigned long start, int count)
329{
330 WARN_CONSOLE_UNLOCKED();
331
332 if (DO_UPDATE(vc)) {
333 hide_cursor(vc);
334 do_update_region(vc, start, count);
335 set_cursor(vc);
336 }
337}
338
339/* Structure of attributes is hardware-dependent */
340
341static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink, u8 _underline, u8 _reverse)
342{
343 if (vc->vc_sw->con_build_attr)
344 return vc->vc_sw->con_build_attr(vc, _color, _intensity, _blink, _underline, _reverse);
345
346#ifndef VT_BUF_VRAM_ONLY
347/*
348 * ++roman: I completely changed the attribute format for monochrome
349 * mode (!can_do_color). The formerly used MDA (monochrome display
350 * adapter) format didn't allow the combination of certain effects.
351 * Now the attribute is just a bit vector:
352 * Bit 0..1: intensity (0..2)
353 * Bit 2 : underline
354 * Bit 3 : reverse
355 * Bit 7 : blink
356 */
357 {
358 u8 a = vc->vc_color;
359 if (!vc->vc_can_do_color)
360 return _intensity |
361 (_underline ? 4 : 0) |
362 (_reverse ? 8 : 0) |
363 (_blink ? 0x80 : 0);
364 if (_underline)
365 a = (a & 0xf0) | vc->vc_ulcolor;
366 else if (_intensity == 0)
367 a = (a & 0xf0) | vc->vc_ulcolor;
368 if (_reverse)
369 a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77);
370 if (_blink)
371 a ^= 0x80;
372 if (_intensity == 2)
373 a ^= 0x08;
374 if (vc->vc_hi_font_mask == 0x100)
375 a <<= 1;
376 return a;
377 }
378#else
379 return 0;
380#endif
381}
382
383static void update_attr(struct vc_data *vc)
384{
385 vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity, vc->vc_blink, vc->vc_underline, vc->vc_reverse ^ vc->vc_decscnm);
386 vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm) << 8) | ' ';
387}
388
389/* Note: inverting the screen twice should revert to the original state */
390void invert_screen(struct vc_data *vc, int offset, int count, int viewed)
391{
392 unsigned short *p;
393
394 WARN_CONSOLE_UNLOCKED();
395
396 count /= 2;
397 p = screenpos(vc, offset, viewed);
398 if (vc->vc_sw->con_invert_region)
399 vc->vc_sw->con_invert_region(vc, p, count);
400#ifndef VT_BUF_VRAM_ONLY
401 else {
402 u16 *q = p;
403 int cnt = count;
404 u16 a;
405
406 if (!vc->vc_can_do_color) {
407 while (cnt--) {
408 a = scr_readw(q);
409 a ^= 0x0800;
410 scr_writew(a, q);
411 q++;
412 }
413 } else if (vc->vc_hi_font_mask == 0x100) {
414 while (cnt--) {
415 a = scr_readw(q);
416 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4);
417 scr_writew(a, q);
418 q++;
419 }
420 } else {
421 while (cnt--) {
422 a = scr_readw(q);
423 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4);
424 scr_writew(a, q);
425 q++;
426 }
427 }
428 }
429#endif
430 if (DO_UPDATE(vc))
431 do_update_region(vc, (unsigned long) p, count);
432}
433
434/* used by selection: complement pointer position */
435void complement_pos(struct vc_data *vc, int offset)
436{
414edcd3 437 static int old_offset = -1;
1da177e4
LT		 438 static unsigned short old;
439 static unsigned short oldx, oldy;
440
441 WARN_CONSOLE_UNLOCKED();
442
414edcd3
AD		 443 if (old_offset != -1 && old_offset >= 0 &&
444 old_offset < vc->vc_screenbuf_size) {
445 scr_writew(old, screenpos(vc, old_offset, 1));
1da177e4
LT		 446 if (DO_UPDATE(vc))
447 vc->vc_sw->con_putc(vc, old, oldy, oldx);
448 }
414edcd3
AD		 449
450 old_offset = offset;
451
452 if (offset != -1 && offset >= 0 &&
453 offset < vc->vc_screenbuf_size) {
1da177e4 454 unsigned short new;
414edcd3 455 unsigned short *p;
1da177e4
LT		 456 p = screenpos(vc, offset, 1);
457 old = scr_readw(p);
458 new = old ^ vc->vc_complement_mask;
459 scr_writew(new, p);
460 if (DO_UPDATE(vc)) {
461 oldx = (offset >> 1) % vc->vc_cols;
462 oldy = (offset >> 1) / vc->vc_cols;
463 vc->vc_sw->con_putc(vc, new, oldy, oldx);
464 }
465 }
414edcd3 466
1da177e4
LT		 467}
468
469static void insert_char(struct vc_data *vc, unsigned int nr)
470{
471 unsigned short *p, *q = (unsigned short *)vc->vc_pos;
472
473 p = q + vc->vc_cols - nr - vc->vc_x;
474 while (--p >= q)
475 scr_writew(scr_readw(p), p + nr);
476 scr_memsetw(q, vc->vc_video_erase_char, nr * 2);
477 vc->vc_need_wrap = 0;
478 if (DO_UPDATE(vc)) {
479 unsigned short oldattr = vc->vc_attr;
480 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x, vc->vc_y, vc->vc_x + nr, 1,
481 vc->vc_cols - vc->vc_x - nr);
482 vc->vc_attr = vc->vc_video_erase_char >> 8;
483 while (nr--)
484 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y, vc->vc_x + nr);
485 vc->vc_attr = oldattr;
486 }
487}
488
489static void delete_char(struct vc_data *vc, unsigned int nr)
490{
491 unsigned int i = vc->vc_x;
492 unsigned short *p = (unsigned short *)vc->vc_pos;
493
494 while (++i <= vc->vc_cols - nr) {
495 scr_writew(scr_readw(p+nr), p);
496 p++;
497 }
498 scr_memsetw(p, vc->vc_video_erase_char, nr * 2);
499 vc->vc_need_wrap = 0;
500 if (DO_UPDATE(vc)) {
501 unsigned short oldattr = vc->vc_attr;
502 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x + nr, vc->vc_y, vc->vc_x, 1,
503 vc->vc_cols - vc->vc_x - nr);
504 vc->vc_attr = vc->vc_video_erase_char >> 8;
505 while (nr--)
506 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y,
507 vc->vc_cols - 1 - nr);
508 vc->vc_attr = oldattr;
509 }
510}
511
512static int softcursor_original;
513
514static void add_softcursor(struct vc_data *vc)
515{
516 int i = scr_readw((u16 *) vc->vc_pos);
517 u32 type = vc->vc_cursor_type;
518
519 if (! (type & 0x10)) return;
520 if (softcursor_original != -1) return;
521 softcursor_original = i;
522 i |= ((type >> 8) & 0xff00 );
523 i ^= ((type) & 0xff00 );
524 if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000;
525 if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700;
526 scr_writew(i, (u16 *) vc->vc_pos);
527 if (DO_UPDATE(vc))
528 vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x);
529}
530
531static void hide_softcursor(struct vc_data *vc)
532{
533 if (softcursor_original != -1) {
534 scr_writew(softcursor_original, (u16 *)vc->vc_pos);
535 if (DO_UPDATE(vc))
536 vc->vc_sw->con_putc(vc, softcursor_original,
537 vc->vc_y, vc->vc_x);
538 softcursor_original = -1;
539 }
540}
541
542static void hide_cursor(struct vc_data *vc)
543{
544 if (vc == sel_cons)
545 clear_selection();
546 vc->vc_sw->con_cursor(vc, CM_ERASE);
547 hide_softcursor(vc);
548}
549
550static void set_cursor(struct vc_data *vc)
551{
552 if (!IS_FG(vc) || console_blanked ||
553 vc->vc_mode == KD_GRAPHICS)
554 return;
555 if (vc->vc_deccm) {
556 if (vc == sel_cons)
557 clear_selection();
558 add_softcursor(vc);
559 if ((vc->vc_cursor_type & 0x0f) != 1)
560 vc->vc_sw->con_cursor(vc, CM_DRAW);
561 } else
562 hide_cursor(vc);
563}
564
565static void set_origin(struct vc_data *vc)
566{
567 WARN_CONSOLE_UNLOCKED();
568
569 if (!CON_IS_VISIBLE(vc) ||
570 !vc->vc_sw->con_set_origin ||
571 !vc->vc_sw->con_set_origin(vc))
572 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
573 vc->vc_visible_origin = vc->vc_origin;
574 vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size;
575 vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x;
576}
577
578static inline void save_screen(struct vc_data *vc)
579{
580 WARN_CONSOLE_UNLOCKED();
581
582 if (vc->vc_sw->con_save_screen)
583 vc->vc_sw->con_save_screen(vc);
584}
585
586/*
587 * Redrawing of screen
588 */
589
590static void clear_buffer_attributes(struct vc_data *vc)
591{
592 unsigned short *p = (unsigned short *)vc->vc_origin;
593 int count = vc->vc_screenbuf_size / 2;
594 int mask = vc->vc_hi_font_mask | 0xff;
595
596 for (; count > 0; count--, p++) {
597 scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p);
598 }
599}
600
601void redraw_screen(struct vc_data *vc, int is_switch)
602{
603 int redraw = 0;
604
605 WARN_CONSOLE_UNLOCKED();
606
607 if (!vc) {
608 /* strange ... */
609 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
610 return;
611 }
612
613 if (is_switch) {
614 struct vc_data *old_vc = vc_cons[fg_console].d;
615 if (old_vc == vc)
616 return;
617 if (!CON_IS_VISIBLE(vc))
618 redraw = 1;
619 *vc->vc_display_fg = vc;
620 fg_console = vc->vc_num;
621 hide_cursor(old_vc);
622 if (!CON_IS_VISIBLE(old_vc)) {
623 save_screen(old_vc);
624 set_origin(old_vc);
625 }
626 } else {
627 hide_cursor(vc);
628 redraw = 1;
629 }
630
631 if (redraw) {
632 int update;
633 int old_was_color = vc->vc_can_do_color;
634
635 set_origin(vc);
636 update = vc->vc_sw->con_switch(vc);
637 set_palette(vc);
638 /*
639 * If console changed from mono<->color, the best we can do
640 * is to clear the buffer attributes. As it currently stands,
641 * rebuilding new attributes from the old buffer is not doable
642 * without overly complex code.
643 */
644 if (old_was_color != vc->vc_can_do_color) {
645 update_attr(vc);
646 clear_buffer_attributes(vc);
647 }
648 if (update && vc->vc_mode != KD_GRAPHICS)
649 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
650 }
651 set_cursor(vc);
652 if (is_switch) {
653 set_leds();
654 compute_shiftstate();
655 }
656}
657
658/*
659 * Allocation, freeing and resizing of VTs.
660 */
661
662int vc_cons_allocated(unsigned int i)
663{
664 return (i < MAX_NR_CONSOLES && vc_cons[i].d);
665}
666
667static void visual_init(struct vc_data *vc, int num, int init)
668{
669 /* ++Geert: vc->vc_sw->con_init determines console size */
670 if (vc->vc_sw)
671 module_put(vc->vc_sw->owner);
672 vc->vc_sw = conswitchp;
673#ifndef VT_SINGLE_DRIVER
674 if (con_driver_map[num])
675 vc->vc_sw = con_driver_map[num];
676#endif
677 __module_get(vc->vc_sw->owner);
678 vc->vc_num = num;
679 vc->vc_display_fg = &master_display_fg;
680 vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir;
681 vc->vc_uni_pagedir = 0;
682 vc->vc_hi_font_mask = 0;
683 vc->vc_complement_mask = 0;
684 vc->vc_can_do_color = 0;
685 vc->vc_sw->con_init(vc, init);
686 if (!vc->vc_complement_mask)
687 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
688 vc->vc_s_complement_mask = vc->vc_complement_mask;
689 vc->vc_size_row = vc->vc_cols << 1;
690 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
691}
692
693int vc_allocate(unsigned int currcons) /* return 0 on success */
694{
695 WARN_CONSOLE_UNLOCKED();
696
697 if (currcons >= MAX_NR_CONSOLES)
698 return -ENXIO;
699 if (!vc_cons[currcons].d) {
700 struct vc_data *vc;
701
702 /* prevent users from taking too much memory */
703 if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE))
704 return -EPERM;
705
706 /* due to the granularity of kmalloc, we waste some memory here */
707 /* the alloc is done in two steps, to optimize the common situation
708 of a 25x80 console (structsize=216, screenbuf_size=4000) */
709 /* although the numbers above are not valid since long ago, the
710 point is still up-to-date and the comment still has its value
711 even if only as a historical artifact. --mj, July 1998 */
712 vc = kmalloc(sizeof(struct vc_data), GFP_KERNEL);
713 if (!vc)
714 return -ENOMEM;
715 memset(vc, 0, sizeof(*vc));
716 vc_cons[currcons].d = vc;
717 visual_init(vc, currcons, 1);
718 if (!*vc->vc_uni_pagedir_loc)
719 con_set_default_unimap(vc);
720 vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL);
721 if (!vc->vc_screenbuf) {
722 kfree(vc);
723 vc_cons[currcons].d = NULL;
724 return -ENOMEM;
725 }
726 vc->vc_kmalloced = 1;
727 vc_init(vc, vc->vc_rows, vc->vc_cols, 1);
728 }
729 return 0;
730}
731
732static inline int resize_screen(struct vc_data *vc, int width, int height)
733{
734 /* Resizes the resolution of the display adapater */
735 int err = 0;
736
737 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize)
738 err = vc->vc_sw->con_resize(vc, width, height);
739 return err;
740}
741
742/*
743 * Change # of rows and columns (0 means unchanged/the size of fg_console)
744 * [this is to be used together with some user program
745 * like resize that changes the hardware videomode]
746 */
747#define VC_RESIZE_MAXCOL (32767)
748#define VC_RESIZE_MAXROW (32767)
749int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int lines)
750{
751 unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0;
752 unsigned int old_cols, old_rows, old_row_size, old_screen_size;
753 unsigned int new_cols, new_rows, new_row_size, new_screen_size;
3b41dc1a 754 unsigned int end;
1da177e4
LT		 755 unsigned short *newscreen;
756
757 WARN_CONSOLE_UNLOCKED();
758
759 if (!vc)
760 return -ENXIO;
761
762 if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW)
763 return -EINVAL;
764
765 new_cols = (cols ? cols : vc->vc_cols);
766 new_rows = (lines ? lines : vc->vc_rows);
767 new_row_size = new_cols << 1;
768 new_screen_size = new_row_size * new_rows;
769
770 if (new_cols == vc->vc_cols && new_rows == vc->vc_rows)
771 return 0;
772
773 newscreen = (unsigned short *) kmalloc(new_screen_size, GFP_USER);
774 if (!newscreen)
775 return -ENOMEM;
776
777 old_rows = vc->vc_rows;
778 old_cols = vc->vc_cols;
779 old_row_size = vc->vc_size_row;
780 old_screen_size = vc->vc_screenbuf_size;
781
782 err = resize_screen(vc, new_cols, new_rows);
783 if (err) {
784 kfree(newscreen);
785 return err;
786 }
787
788 vc->vc_rows = new_rows;
789 vc->vc_cols = new_cols;
790 vc->vc_size_row = new_row_size;
791 vc->vc_screenbuf_size = new_screen_size;
792
793 rlth = min(old_row_size, new_row_size);
794 rrem = new_row_size - rlth;
795 old_origin = vc->vc_origin;
796 new_origin = (long) newscreen;
797 new_scr_end = new_origin + new_screen_size;
3b41dc1a
AD		 798
799 if (vc->vc_y > new_rows) {
800 if (old_rows - vc->vc_y < new_rows) {
801 /*
802 * Cursor near the bottom, copy contents from the
803 * bottom of buffer
804 */
805 old_origin += (old_rows - new_rows) * old_row_size;
806 end = vc->vc_scr_end;
807 } else {
808 /*
809 * Cursor is in no man's land, copy 1/2 screenful
810 * from the top and bottom of cursor position
811 */
812 old_origin += (vc->vc_y - new_rows/2) * old_row_size;
065d9cac 813 end = old_origin + (old_row_size * new_rows);
3b41dc1a
AD		 814 }
815 } else
816 /*
817 * Cursor near the top, copy contents from the top of buffer
818 */
065d9cac
AD		 819 end = (old_rows > new_rows) ? old_origin +
820 (old_row_size * new_rows) :
3b41dc1a 821 vc->vc_scr_end;
1da177e4
LT		 822
823 update_attr(vc);
824
3b41dc1a
AD		 825 while (old_origin < end) {
826 scr_memcpyw((unsigned short *) new_origin,
827 (unsigned short *) old_origin, rlth);
1da177e4 828 if (rrem)
3b41dc1a
AD		 829 scr_memsetw((void *)(new_origin + rlth),
830 vc->vc_video_erase_char, rrem);
1da177e4
LT		 831 old_origin += old_row_size;
832 new_origin += new_row_size;
833 }
834 if (new_scr_end > new_origin)
3b41dc1a
AD		 835 scr_memsetw((void *)new_origin, vc->vc_video_erase_char,
836 new_scr_end - new_origin);
1da177e4
LT		 837 if (vc->vc_kmalloced)
838 kfree(vc->vc_screenbuf);
839 vc->vc_screenbuf = newscreen;
840 vc->vc_kmalloced = 1;
841 vc->vc_screenbuf_size = new_screen_size;
842 set_origin(vc);
843
844 /* do part of a reset_terminal() */
845 vc->vc_top = 0;
846 vc->vc_bottom = vc->vc_rows;
847 gotoxy(vc, vc->vc_x, vc->vc_y);
848 save_cur(vc);
849
850 if (vc->vc_tty) {
851 struct winsize ws, *cws = &vc->vc_tty->winsize;
852
853 memset(&ws, 0, sizeof(ws));
854 ws.ws_row = vc->vc_rows;
855 ws.ws_col = vc->vc_cols;
856 ws.ws_ypixel = vc->vc_scan_lines;
857 if ((ws.ws_row != cws->ws_row || ws.ws_col != cws->ws_col) &&
858 vc->vc_tty->pgrp > 0)
859 kill_pg(vc->vc_tty->pgrp, SIGWINCH, 1);
860 *cws = ws;
861 }
862
863 if (CON_IS_VISIBLE(vc))
864 update_screen(vc);
865 return err;
866}
867
868
869void vc_disallocate(unsigned int currcons)
870{
871 WARN_CONSOLE_UNLOCKED();
872
873 if (vc_cons_allocated(currcons)) {
874 struct vc_data *vc = vc_cons[currcons].d;
875 vc->vc_sw->con_deinit(vc);
876 if (vc->vc_kmalloced)
877 kfree(vc->vc_screenbuf);
878 if (currcons >= MIN_NR_CONSOLES)
879 kfree(vc);
880 vc_cons[currcons].d = NULL;
881 }
882}
883
884/*
885 * VT102 emulator
886 */
887
888#define set_kbd(vc, x) set_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
889#define clr_kbd(vc, x) clr_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
890#define is_kbd(vc, x) vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
891
892#define decarm VC_REPEAT
893#define decckm VC_CKMODE
894#define kbdapplic VC_APPLIC
895#define lnm VC_CRLF
896
897/*
898 * this is what the terminal answers to a ESC-Z or csi0c query.
899 */
900#define VT100ID "\033[?1;2c"
901#define VT102ID "\033[?6c"
902
903unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7,
904 8,12,10,14, 9,13,11,15 };
905
906/* the default colour table, for VGA+ colour systems */
907int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
908 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
909int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
910 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
911int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
912 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
913
914/*
915 * gotoxy() must verify all boundaries, because the arguments
916 * might also be negative. If the given position is out of
917 * bounds, the cursor is placed at the nearest margin.
918 */
919static void gotoxy(struct vc_data *vc, int new_x, int new_y)
920{
921 int min_y, max_y;
922
923 if (new_x < 0)
924 vc->vc_x = 0;
925 else {
926 if (new_x >= vc->vc_cols)
927 vc->vc_x = vc->vc_cols - 1;
928 else
929 vc->vc_x = new_x;
930 }
931
932 if (vc->vc_decom) {
933 min_y = vc->vc_top;
934 max_y = vc->vc_bottom;
935 } else {
936 min_y = 0;
937 max_y = vc->vc_rows;
938 }
939 if (new_y < min_y)
940 vc->vc_y = min_y;
941 else if (new_y >= max_y)
942 vc->vc_y = max_y - 1;
943 else
944 vc->vc_y = new_y;
945 vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1);
946 vc->vc_need_wrap = 0;
947}
948
949/* for absolute user moves, when decom is set */
950static void gotoxay(struct vc_data *vc, int new_x, int new_y)
951{
952 gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y);
953}
954
955void scrollback(struct vc_data *vc, int lines)
956{
957 if (!lines)
958 lines = vc->vc_rows / 2;
959 scrolldelta(-lines);
960}
961
962void scrollfront(struct vc_data *vc, int lines)
963{
964 if (!lines)
965 lines = vc->vc_rows / 2;
966 scrolldelta(lines);
967}
968
969static void lf(struct vc_data *vc)
970{
971 /* don't scroll if above bottom of scrolling region, or
972 * if below scrolling region
973 */
974 if (vc->vc_y + 1 == vc->vc_bottom)
975 scrup(vc, vc->vc_top, vc->vc_bottom, 1);
976 else if (vc->vc_y < vc->vc_rows - 1) {
977 vc->vc_y++;
978 vc->vc_pos += vc->vc_size_row;
979 }
980 vc->vc_need_wrap = 0;
981}
982
983static void ri(struct vc_data *vc)
984{
985 /* don't scroll if below top of scrolling region, or
986 * if above scrolling region
987 */
988 if (vc->vc_y == vc->vc_top)
989 scrdown(vc, vc->vc_top, vc->vc_bottom, 1);
990 else if (vc->vc_y > 0) {
991 vc->vc_y--;
992 vc->vc_pos -= vc->vc_size_row;
993 }
994 vc->vc_need_wrap = 0;
995}
996
997static inline void cr(struct vc_data *vc)
998{
999 vc->vc_pos -= vc->vc_x << 1;
1000 vc->vc_need_wrap = vc->vc_x = 0;
1001}
1002
1003static inline void bs(struct vc_data *vc)
1004{
1005 if (vc->vc_x) {
1006 vc->vc_pos -= 2;
1007 vc->vc_x--;
1008 vc->vc_need_wrap = 0;
1009 }
1010}
1011
1012static inline void del(struct vc_data *vc)
1013{
1014 /* ignored */
1015}
1016
1017static void csi_J(struct vc_data *vc, int vpar)
1018{
1019 unsigned int count;
1020 unsigned short * start;
1021
1022 switch (vpar) {
1023 case 0: /* erase from cursor to end of display */
1024 count = (vc->vc_scr_end - vc->vc_pos) >> 1;
1025 start = (unsigned short *)vc->vc_pos;
1026 if (DO_UPDATE(vc)) {
1027 /* do in two stages */
1028 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1029 vc->vc_cols - vc->vc_x);
1030 vc->vc_sw->con_clear(vc, vc->vc_y + 1, 0,
1031 vc->vc_rows - vc->vc_y - 1,
1032 vc->vc_cols);
1033 }
1034 break;
1035 case 1: /* erase from start to cursor */
1036 count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1;
1037 start = (unsigned short *)vc->vc_origin;
1038 if (DO_UPDATE(vc)) {
1039 /* do in two stages */
1040 vc->vc_sw->con_clear(vc, 0, 0, vc->vc_y,
1041 vc->vc_cols);
1042 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1043 vc->vc_x + 1);
1044 }
1045 break;
1046 case 2: /* erase whole display */
1047 count = vc->vc_cols * vc->vc_rows;
1048 start = (unsigned short *)vc->vc_origin;
1049 if (DO_UPDATE(vc))
1050 vc->vc_sw->con_clear(vc, 0, 0,
1051 vc->vc_rows,
1052 vc->vc_cols);
1053 break;
1054 default:
1055 return;
1056 }
1057 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1058 vc->vc_need_wrap = 0;
1059}
1060
1061static void csi_K(struct vc_data *vc, int vpar)
1062{
1063 unsigned int count;
1064 unsigned short * start;
1065
1066 switch (vpar) {
1067 case 0: /* erase from cursor to end of line */
1068 count = vc->vc_cols - vc->vc_x;
1069 start = (unsigned short *)vc->vc_pos;
1070 if (DO_UPDATE(vc))
1071 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1072 vc->vc_cols - vc->vc_x);
1073 break;
1074 case 1: /* erase from start of line to cursor */
1075 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1076 count = vc->vc_x + 1;
1077 if (DO_UPDATE(vc))
1078 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1079 vc->vc_x + 1);
1080 break;
1081 case 2: /* erase whole line */
1082 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1083 count = vc->vc_cols;
1084 if (DO_UPDATE(vc))
1085 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1086 vc->vc_cols);
1087 break;
1088 default:
1089 return;
1090 }
1091 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1092 vc->vc_need_wrap = 0;
1093}
1094
1095static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */
1096{ /* not vt100? */
1097 int count;
1098
1099 if (!vpar)
1100 vpar++;
1101 count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar;
1102
1103 scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count);
1104 if (DO_UPDATE(vc))
1105 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count);
1106 vc->vc_need_wrap = 0;
1107}
1108
1109static void default_attr(struct vc_data *vc)
1110{
1111 vc->vc_intensity = 1;
1112 vc->vc_underline = 0;
1113 vc->vc_reverse = 0;
1114 vc->vc_blink = 0;
1115 vc->vc_color = vc->vc_def_color;
1116}
1117
1118/* console_sem is held */
1119static void csi_m(struct vc_data *vc)
1120{
1121 int i;
1122
1123 for (i = 0; i <= vc->vc_npar; i++)
1124 switch (vc->vc_par[i]) {
1125 case 0: /* all attributes off */
1126 default_attr(vc);
1127 break;
1128 case 1:
1129 vc->vc_intensity = 2;
1130 break;
1131 case 2:
1132 vc->vc_intensity = 0;
1133 break;
1134 case 4:
1135 vc->vc_underline = 1;
1136 break;
1137 case 5:
1138 vc->vc_blink = 1;
1139 break;
1140 case 7:
1141 vc->vc_reverse = 1;
1142 break;
1143 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1144 * Select primary font, don't display
1145 * control chars if defined, don't set
1146 * bit 8 on output.
1147 */
1148 vc->vc_translate = set_translate(vc->vc_charset == 0
1149 ? vc->vc_G0_charset
1150 : vc->vc_G1_charset, vc);
1151 vc->vc_disp_ctrl = 0;
1152 vc->vc_toggle_meta = 0;
1153 break;
1154 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1155 * Select first alternate font, lets
1156 * chars < 32 be displayed as ROM chars.
1157 */
1158 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1159 vc->vc_disp_ctrl = 1;
1160 vc->vc_toggle_meta = 0;
1161 break;
1162 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1163 * Select second alternate font, toggle
1164 * high bit before displaying as ROM char.
1165 */
1166 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1167 vc->vc_disp_ctrl = 1;
1168 vc->vc_toggle_meta = 1;
1169 break;
1170 case 21:
1171 case 22:
1172 vc->vc_intensity = 1;
1173 break;
1174 case 24:
1175 vc->vc_underline = 0;
1176 break;
1177 case 25:
1178 vc->vc_blink = 0;
1179 break;
1180 case 27:
1181 vc->vc_reverse = 0;
1182 break;
1183 case 38: /* ANSI X3.64-1979 (SCO-ish?)
1184 * Enables underscore, white foreground
1185 * with white underscore (Linux - use
1186 * default foreground).
1187 */
1188 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1189 vc->vc_underline = 1;
1190 break;
1191 case 39: /* ANSI X3.64-1979 (SCO-ish?)
1192 * Disable underline option.
1193 * Reset colour to default? It did this
1194 * before...
1195 */
1196 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1197 vc->vc_underline = 0;
1198 break;
1199 case 49:
1200 vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f);
1201 break;
1202 default:
1203 if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37)
1204 vc->vc_color = color_table[vc->vc_par[i] - 30]
1205 | (vc->vc_color & 0xf0);
1206 else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47)
1207 vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4)
1208 | (vc->vc_color & 0x0f);
1209 break;
1210 }
1211 update_attr(vc);
1212}
1213
1214static void respond_string(const char *p, struct tty_struct *tty)
1215{
1216 while (*p) {
1217 tty_insert_flip_char(tty, *p, 0);
1218 p++;
1219 }
1220 con_schedule_flip(tty);
1221}
1222
1223static void cursor_report(struct vc_data *vc, struct tty_struct *tty)
1224{
1225 char buf[40];
1226
1227 sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1);
1228 respond_string(buf, tty);
1229}
1230
1231static inline void status_report(struct tty_struct *tty)
1232{
1233 respond_string("\033[0n", tty); /* Terminal ok */
1234}
1235
1236static inline void respond_ID(struct tty_struct * tty)
1237{
1238 respond_string(VT102ID, tty);
1239}
1240
1241void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry)
1242{
1243 char buf[8];
1244
1245 sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx),
1246 (char)('!' + mry));
1247 respond_string(buf, tty);
1248}
1249
1250/* invoked via ioctl(TIOCLINUX) and through set_selection */
1251int mouse_reporting(void)
1252{
1253 return vc_cons[fg_console].d->vc_report_mouse;
1254}
1255
1256/* console_sem is held */
1257static void set_mode(struct vc_data *vc, int on_off)
1258{
1259 int i;
1260
1261 for (i = 0; i <= vc->vc_npar; i++)
1262 if (vc->vc_ques) {
1263 switch(vc->vc_par[i]) { /* DEC private modes set/reset */
1264 case 1: /* Cursor keys send ^[Ox/^[[x */
1265 if (on_off)
1266 set_kbd(vc, decckm);
1267 else
1268 clr_kbd(vc, decckm);
1269 break;
1270 case 3: /* 80/132 mode switch unimplemented */
1271 vc->vc_deccolm = on_off;
1272#if 0
1273 vc_resize(deccolm ? 132 : 80, vc->vc_rows);
1274 /* this alone does not suffice; some user mode
1275 utility has to change the hardware regs */
1276#endif
1277 break;
1278 case 5: /* Inverted screen on/off */
1279 if (vc->vc_decscnm != on_off) {
1280 vc->vc_decscnm = on_off;
1281 invert_screen(vc, 0, vc->vc_screenbuf_size, 0);
1282 update_attr(vc);
1283 }
1284 break;
1285 case 6: /* Origin relative/absolute */
1286 vc->vc_decom = on_off;
1287 gotoxay(vc, 0, 0);
1288 break;
1289 case 7: /* Autowrap on/off */
1290 vc->vc_decawm = on_off;
1291 break;
1292 case 8: /* Autorepeat on/off */
1293 if (on_off)
1294 set_kbd(vc, decarm);
1295 else
1296 clr_kbd(vc, decarm);
1297 break;
1298 case 9:
1299 vc->vc_report_mouse = on_off ? 1 : 0;
1300 break;
1301 case 25: /* Cursor on/off */
1302 vc->vc_deccm = on_off;
1303 break;
1304 case 1000:
1305 vc->vc_report_mouse = on_off ? 2 : 0;
1306 break;
1307 }
1308 } else {
1309 switch(vc->vc_par[i]) { /* ANSI modes set/reset */
1310 case 3: /* Monitor (display ctrls) */
1311 vc->vc_disp_ctrl = on_off;
1312 break;
1313 case 4: /* Insert Mode on/off */
1314 vc->vc_decim = on_off;
1315 break;
1316 case 20: /* Lf, Enter == CrLf/Lf */
1317 if (on_off)
1318 set_kbd(vc, lnm);
1319 else
1320 clr_kbd(vc, lnm);
1321 break;
1322 }
1323 }
1324}
1325
1326/* console_sem is held */
1327static void setterm_command(struct vc_data *vc)
1328{
1329 switch(vc->vc_par[0]) {
1330 case 1: /* set color for underline mode */
1331 if (vc->vc_can_do_color &&
1332 vc->vc_par[1] < 16) {
1333 vc->vc_ulcolor = color_table[vc->vc_par[1]];
1334 if (vc->vc_underline)
1335 update_attr(vc);
1336 }
1337 break;
1338 case 2: /* set color for half intensity mode */
1339 if (vc->vc_can_do_color &&
1340 vc->vc_par[1] < 16) {
1341 vc->vc_halfcolor = color_table[vc->vc_par[1]];
1342 if (vc->vc_intensity == 0)
1343 update_attr(vc);
1344 }
1345 break;
1346 case 8: /* store colors as defaults */
1347 vc->vc_def_color = vc->vc_attr;
1348 if (vc->vc_hi_font_mask == 0x100)
1349 vc->vc_def_color >>= 1;
1350 default_attr(vc);
1351 update_attr(vc);
1352 break;
1353 case 9: /* set blanking interval */
1354 blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1355 poke_blanked_console();
1356 break;
1357 case 10: /* set bell frequency in Hz */
1358 if (vc->vc_npar >= 1)
1359 vc->vc_bell_pitch = vc->vc_par[1];
1360 else
1361 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1362 break;
1363 case 11: /* set bell duration in msec */
1364 if (vc->vc_npar >= 1)
1365 vc->vc_bell_duration = (vc->vc_par[1] < 2000) ?
1366 vc->vc_par[1] * HZ / 1000 : 0;
1367 else
1368 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1369 break;
1370 case 12: /* bring specified console to the front */
1371 if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1))
1372 set_console(vc->vc_par[1] - 1);
1373 break;
1374 case 13: /* unblank the screen */
1375 poke_blanked_console();
1376 break;
1377 case 14: /* set vesa powerdown interval */
1378 vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1379 break;
1380 case 15: /* activate the previous console */
1381 set_console(last_console);
1382 break;
1383 }
1384}
1385
1386/* console_sem is held */
1387static void csi_at(struct vc_data *vc, unsigned int nr)
1388{
1389 if (nr > vc->vc_cols - vc->vc_x)
1390 nr = vc->vc_cols - vc->vc_x;
1391 else if (!nr)
1392 nr = 1;
1393 insert_char(vc, nr);
1394}
1395
1396/* console_sem is held */
1397static void csi_L(struct vc_data *vc, unsigned int nr)
1398{
1399 if (nr > vc->vc_rows - vc->vc_y)
1400 nr = vc->vc_rows - vc->vc_y;
1401 else if (!nr)
1402 nr = 1;
1403 scrdown(vc, vc->vc_y, vc->vc_bottom, nr);
1404 vc->vc_need_wrap = 0;
1405}
1406
1407/* console_sem is held */
1408static void csi_P(struct vc_data *vc, unsigned int nr)
1409{
1410 if (nr > vc->vc_cols - vc->vc_x)
1411 nr = vc->vc_cols - vc->vc_x;
1412 else if (!nr)
1413 nr = 1;
1414 delete_char(vc, nr);
1415}
1416
1417/* console_sem is held */
1418static void csi_M(struct vc_data *vc, unsigned int nr)
1419{
1420 if (nr > vc->vc_rows - vc->vc_y)
1421 nr = vc->vc_rows - vc->vc_y;
1422 else if (!nr)
1423 nr=1;
1424 scrup(vc, vc->vc_y, vc->vc_bottom, nr);
1425 vc->vc_need_wrap = 0;
1426}
1427
1428/* console_sem is held (except via vc_init->reset_terminal */
1429static void save_cur(struct vc_data *vc)
1430{
1431 vc->vc_saved_x = vc->vc_x;
1432 vc->vc_saved_y = vc->vc_y;
1433 vc->vc_s_intensity = vc->vc_intensity;
1434 vc->vc_s_underline = vc->vc_underline;
1435 vc->vc_s_blink = vc->vc_blink;
1436 vc->vc_s_reverse = vc->vc_reverse;
1437 vc->vc_s_charset = vc->vc_charset;
1438 vc->vc_s_color = vc->vc_color;
1439 vc->vc_saved_G0 = vc->vc_G0_charset;
1440 vc->vc_saved_G1 = vc->vc_G1_charset;
1441}
1442
1443/* console_sem is held */
1444static void restore_cur(struct vc_data *vc)
1445{
1446 gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y);
1447 vc->vc_intensity = vc->vc_s_intensity;
1448 vc->vc_underline = vc->vc_s_underline;
1449 vc->vc_blink = vc->vc_s_blink;
1450 vc->vc_reverse = vc->vc_s_reverse;
1451 vc->vc_charset = vc->vc_s_charset;
1452 vc->vc_color = vc->vc_s_color;
1453 vc->vc_G0_charset = vc->vc_saved_G0;
1454 vc->vc_G1_charset = vc->vc_saved_G1;
1455 vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc);
1456 update_attr(vc);
1457 vc->vc_need_wrap = 0;
1458}
1459
1460enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey,
1461 EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd,
1462 ESpalette };
1463
1464/* console_sem is held (except via vc_init()) */
1465static void reset_terminal(struct vc_data *vc, int do_clear)
1466{
1467 vc->vc_top = 0;
1468 vc->vc_bottom = vc->vc_rows;
1469 vc->vc_state = ESnormal;
1470 vc->vc_ques = 0;
1471 vc->vc_translate = set_translate(LAT1_MAP, vc);
1472 vc->vc_G0_charset = LAT1_MAP;
1473 vc->vc_G1_charset = GRAF_MAP;
1474 vc->vc_charset = 0;
1475 vc->vc_need_wrap = 0;
1476 vc->vc_report_mouse = 0;
1477 vc->vc_utf = 0;
1478 vc->vc_utf_count = 0;
1479
1480 vc->vc_disp_ctrl = 0;
1481 vc->vc_toggle_meta = 0;
1482
1483 vc->vc_decscnm = 0;
1484 vc->vc_decom = 0;
1485 vc->vc_decawm = 1;
1486 vc->vc_deccm = 1;
1487 vc->vc_decim = 0;
1488
1489 set_kbd(vc, decarm);
1490 clr_kbd(vc, decckm);
1491 clr_kbd(vc, kbdapplic);
1492 clr_kbd(vc, lnm);
1493 kbd_table[vc->vc_num].lockstate = 0;
1494 kbd_table[vc->vc_num].slockstate = 0;
1495 kbd_table[vc->vc_num].ledmode = LED_SHOW_FLAGS;
1496 kbd_table[vc->vc_num].ledflagstate = kbd_table[vc->vc_num].default_ledflagstate;
1497 /* do not do set_leds here because this causes an endless tasklet loop
1498 when the keyboard hasn't been initialized yet */
1499
1500 vc->vc_cursor_type = CUR_DEFAULT;
1501 vc->vc_complement_mask = vc->vc_s_complement_mask;
1502
1503 default_attr(vc);
1504 update_attr(vc);
1505
1506 vc->vc_tab_stop[0] = 0x01010100;
1507 vc->vc_tab_stop[1] =
1508 vc->vc_tab_stop[2] =
1509 vc->vc_tab_stop[3] =
1510 vc->vc_tab_stop[4] = 0x01010101;
1511
1512 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1513 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1514
1515 gotoxy(vc, 0, 0);
1516 save_cur(vc);
1517 if (do_clear)
1518 csi_J(vc, 2);
1519}
1520
1521/* console_sem is held */
1522static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
1523{
1524 /*
1525 * Control characters can be used in the _middle_
1526 * of an escape sequence.
1527 */
1528 switch (c) {
1529 case 0:
1530 return;
1531 case 7:
1532 if (vc->vc_bell_duration)
1533 kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration);
1534 return;
1535 case 8:
1536 bs(vc);
1537 return;
1538 case 9:
1539 vc->vc_pos -= (vc->vc_x << 1);
1540 while (vc->vc_x < vc->vc_cols - 1) {
1541 vc->vc_x++;
1542 if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31)))
1543 break;
1544 }
1545 vc->vc_pos += (vc->vc_x << 1);
1546 return;
1547 case 10: case 11: case 12:
1548 lf(vc);
1549 if (!is_kbd(vc, lnm))
1550 return;
1551 case 13:
1552 cr(vc);
1553 return;
1554 case 14:
1555 vc->vc_charset = 1;
1556 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1557 vc->vc_disp_ctrl = 1;
1558 return;
1559 case 15:
1560 vc->vc_charset = 0;
1561 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1562 vc->vc_disp_ctrl = 0;
1563 return;
1564 case 24: case 26:
1565 vc->vc_state = ESnormal;
1566 return;
1567 case 27:
1568 vc->vc_state = ESesc;
1569 return;
1570 case 127:
1571 del(vc);
1572 return;
1573 case 128+27:
1574 vc->vc_state = ESsquare;
1575 return;
1576 }
1577 switch(vc->vc_state) {
1578 case ESesc:
1579 vc->vc_state = ESnormal;
1580 switch (c) {
1581 case '[':
1582 vc->vc_state = ESsquare;
1583 return;
1584 case ']':
1585 vc->vc_state = ESnonstd;
1586 return;
1587 case '%':
1588 vc->vc_state = ESpercent;
1589 return;
1590 case 'E':
1591 cr(vc);
1592 lf(vc);
1593 return;
1594 case 'M':
1595 ri(vc);
1596 return;
1597 case 'D':
1598 lf(vc);
1599 return;
1600 case 'H':
1601 vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31));
1602 return;
1603 case 'Z':
1604 respond_ID(tty);
1605 return;
1606 case '7':
1607 save_cur(vc);
1608 return;
1609 case '8':
1610 restore_cur(vc);
1611 return;
1612 case '(':
1613 vc->vc_state = ESsetG0;
1614 return;
1615 case ')':
1616 vc->vc_state = ESsetG1;
1617 return;
1618 case '#':
1619 vc->vc_state = EShash;
1620 return;
1621 case 'c':
1622 reset_terminal(vc, 1);
1623 return;
1624 case '>': /* Numeric keypad */
1625 clr_kbd(vc, kbdapplic);
1626 return;
1627 case '=': /* Appl. keypad */
1628 set_kbd(vc, kbdapplic);
1629 return;
1630 }
1631 return;
1632 case ESnonstd:
1633 if (c=='P') { /* palette escape sequence */
1634 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1635 vc->vc_par[vc->vc_npar] = 0;
1636 vc->vc_npar = 0;
1637 vc->vc_state = ESpalette;
1638 return;
1639 } else if (c=='R') { /* reset palette */
1640 reset_palette(vc);
1641 vc->vc_state = ESnormal;
1642 } else
1643 vc->vc_state = ESnormal;
1644 return;
1645 case ESpalette:
1646 if ( (c>='0'&&c<='9') || (c>='A'&&c<='F') || (c>='a'&&c<='f') ) {
1647 vc->vc_par[vc->vc_npar++] = (c > '9' ? (c & 0xDF) - 'A' + 10 : c - '0');
1648 if (vc->vc_npar == 7) {
1649 int i = vc->vc_par[0] * 3, j = 1;
1650 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1651 vc->vc_palette[i++] += vc->vc_par[j++];
1652 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1653 vc->vc_palette[i++] += vc->vc_par[j++];
1654 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1655 vc->vc_palette[i] += vc->vc_par[j];
1656 set_palette(vc);
1657 vc->vc_state = ESnormal;
1658 }
1659 } else
1660 vc->vc_state = ESnormal;
1661 return;
1662 case ESsquare:
1663 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1664 vc->vc_par[vc->vc_npar] = 0;
1665 vc->vc_npar = 0;
1666 vc->vc_state = ESgetpars;
1667 if (c == '[') { /* Function key */
1668 vc->vc_state=ESfunckey;
1669 return;
1670 }
1671 vc->vc_ques = (c == '?');
1672 if (vc->vc_ques)
1673 return;
1674 case ESgetpars:
1675 if (c == ';' && vc->vc_npar < NPAR - 1) {
1676 vc->vc_npar++;
1677 return;
1678 } else if (c>='0' && c<='9') {
1679 vc->vc_par[vc->vc_npar] *= 10;
1680 vc->vc_par[vc->vc_npar] += c - '0';
1681 return;
1682 } else
1683 vc->vc_state = ESgotpars;
1684 case ESgotpars:
1685 vc->vc_state = ESnormal;
1686 switch(c) {
1687 case 'h':
1688 set_mode(vc, 1);
1689 return;
1690 case 'l':
1691 set_mode(vc, 0);
1692 return;
1693 case 'c':
1694 if (vc->vc_ques) {
1695 if (vc->vc_par[0])
1696 vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16);
1697 else
1698 vc->vc_cursor_type = CUR_DEFAULT;
1699 return;
1700 }
1701 break;
1702 case 'm':
1703 if (vc->vc_ques) {
1704 clear_selection();
1705 if (vc->vc_par[0])
1706 vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1];
1707 else
1708 vc->vc_complement_mask = vc->vc_s_complement_mask;
1709 return;
1710 }
1711 break;
1712 case 'n':
1713 if (!vc->vc_ques) {
1714 if (vc->vc_par[0] == 5)
1715 status_report(tty);
1716 else if (vc->vc_par[0] == 6)
1717 cursor_report(vc, tty);
1718 }
1719 return;
1720 }
1721 if (vc->vc_ques) {
1722 vc->vc_ques = 0;
1723 return;
1724 }
1725 switch(c) {
1726 case 'G': case '`':
1727 if (vc->vc_par[0])
1728 vc->vc_par[0]--;
1729 gotoxy(vc, vc->vc_par[0], vc->vc_y);
1730 return;
1731 case 'A':
1732 if (!vc->vc_par[0])
1733 vc->vc_par[0]++;
1734 gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]);
1735 return;
1736 case 'B': case 'e':
1737 if (!vc->vc_par[0])
1738 vc->vc_par[0]++;
1739 gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]);
1740 return;
1741 case 'C': case 'a':
1742 if (!vc->vc_par[0])
1743 vc->vc_par[0]++;
1744 gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y);
1745 return;
1746 case 'D':
1747 if (!vc->vc_par[0])
1748 vc->vc_par[0]++;
1749 gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y);
1750 return;
1751 case 'E':
1752 if (!vc->vc_par[0])
1753 vc->vc_par[0]++;
1754 gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]);
1755 return;
1756 case 'F':
1757 if (!vc->vc_par[0])
1758 vc->vc_par[0]++;
1759 gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]);
1760 return;
1761 case 'd':
1762 if (vc->vc_par[0])
1763 vc->vc_par[0]--;
1764 gotoxay(vc, vc->vc_x ,vc->vc_par[0]);
1765 return;
1766 case 'H': case 'f':
1767 if (vc->vc_par[0])
1768 vc->vc_par[0]--;
1769 if (vc->vc_par[1])
1770 vc->vc_par[1]--;
1771 gotoxay(vc, vc->vc_par[1], vc->vc_par[0]);
1772 return;
1773 case 'J':
1774 csi_J(vc, vc->vc_par[0]);
1775 return;
1776 case 'K':
1777 csi_K(vc, vc->vc_par[0]);
1778 return;
1779 case 'L':
1780 csi_L(vc, vc->vc_par[0]);
1781 return;
1782 case 'M':
1783 csi_M(vc, vc->vc_par[0]);
1784 return;
1785 case 'P':
1786 csi_P(vc, vc->vc_par[0]);
1787 return;
1788 case 'c':
1789 if (!vc->vc_par[0])
1790 respond_ID(tty);
1791 return;
1792 case 'g':
1793 if (!vc->vc_par[0])
1794 vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31));
1795 else if (vc->vc_par[0] == 3) {
1796 vc->vc_tab_stop[0] =
1797 vc->vc_tab_stop[1] =
1798 vc->vc_tab_stop[2] =
1799 vc->vc_tab_stop[3] =
1800 vc->vc_tab_stop[4] = 0;
1801 }
1802 return;
1803 case 'm':
1804 csi_m(vc);
1805 return;
1806 case 'q': /* DECLL - but only 3 leds */
1807 /* map 0,1,2,3 to 0,1,2,4 */
1808 if (vc->vc_par[0] < 4)
1809 setledstate(kbd_table + vc->vc_num,
1810 (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4);
1811 return;
1812 case 'r':
1813 if (!vc->vc_par[0])
1814 vc->vc_par[0]++;
1815 if (!vc->vc_par[1])
1816 vc->vc_par[1] = vc->vc_rows;
1817 /* Minimum allowed region is 2 lines */
1818 if (vc->vc_par[0] < vc->vc_par[1] &&
1819 vc->vc_par[1] <= vc->vc_rows) {
1820 vc->vc_top = vc->vc_par[0] - 1;
1821 vc->vc_bottom = vc->vc_par[1];
1822 gotoxay(vc, 0, 0);
1823 }
1824 return;
1825 case 's':
1826 save_cur(vc);
1827 return;
1828 case 'u':
1829 restore_cur(vc);
1830 return;
1831 case 'X':
1832 csi_X(vc, vc->vc_par[0]);
1833 return;
1834 case '@':
1835 csi_at(vc, vc->vc_par[0]);
1836 return;
1837 case ']': /* setterm functions */
1838 setterm_command(vc);
1839 return;
1840 }
1841 return;
1842 case ESpercent:
1843 vc->vc_state = ESnormal;
1844 switch (c) {
1845 case '@': /* defined in ISO 2022 */
1846 vc->vc_utf = 0;
1847 return;
1848 case 'G': /* prelim official escape code */
1849 case '8': /* retained for compatibility */
1850 vc->vc_utf = 1;
1851 return;
1852 }
1853 return;
1854 case ESfunckey:
1855 vc->vc_state = ESnormal;
1856 return;
1857 case EShash:
1858 vc->vc_state = ESnormal;
1859 if (c == '8') {
1860 /* DEC screen alignment test. kludge :-) */
1861 vc->vc_video_erase_char =
1862 (vc->vc_video_erase_char & 0xff00) | 'E';
1863 csi_J(vc, 2);
1864 vc->vc_video_erase_char =
1865 (vc->vc_video_erase_char & 0xff00) | ' ';
1866 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
1867 }
1868 return;
1869 case ESsetG0:
1870 if (c == '0')
1871 vc->vc_G0_charset = GRAF_MAP;
1872 else if (c == 'B')
1873 vc->vc_G0_charset = LAT1_MAP;
1874 else if (c == 'U')
1875 vc->vc_G0_charset = IBMPC_MAP;
1876 else if (c == 'K')
1877 vc->vc_G0_charset = USER_MAP;
1878 if (vc->vc_charset == 0)
1879 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1880 vc->vc_state = ESnormal;
1881 return;
1882 case ESsetG1:
1883 if (c == '0')
1884 vc->vc_G1_charset = GRAF_MAP;
1885 else if (c == 'B')
1886 vc->vc_G1_charset = LAT1_MAP;
1887 else if (c == 'U')
1888 vc->vc_G1_charset = IBMPC_MAP;
1889 else if (c == 'K')
1890 vc->vc_G1_charset = USER_MAP;
1891 if (vc->vc_charset == 1)
1892 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1893 vc->vc_state = ESnormal;
1894 return;
1895 default:
1896 vc->vc_state = ESnormal;
1897 }
1898}
1899
1900/* This is a temporary buffer used to prepare a tty console write
1901 * so that we can easily avoid touching user space while holding the
1902 * console spinlock. It is allocated in con_init and is shared by
1903 * this code and the vc_screen read/write tty calls.
1904 *
1905 * We have to allocate this statically in the kernel data section
1906 * since console_init (and thus con_init) are called before any
1907 * kernel memory allocation is available.
1908 */
1909char con_buf[CON_BUF_SIZE];
1910DECLARE_MUTEX(con_buf_sem);
1911
1912/* acquires console_sem */
1913static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count)
1914{
1915#ifdef VT_BUF_VRAM_ONLY
1916#define FLUSH do { } while(0);
1917#else
1918#define FLUSH if (draw_x >= 0) { \
1919 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
1920 draw_x = -1; \
1921 }
1922#endif
1923
1924 int c, tc, ok, n = 0, draw_x = -1;
1925 unsigned int currcons;
1926 unsigned long draw_from = 0, draw_to = 0;
1927 struct vc_data *vc;
1928 u16 himask, charmask;
1929 const unsigned char *orig_buf = NULL;
1930 int orig_count;
1931
1932 if (in_interrupt())
1933 return count;
1934
1935 might_sleep();
1936
1937 acquire_console_sem();
1938 vc = tty->driver_data;
1939 if (vc == NULL) {
1940 printk(KERN_ERR "vt: argh, driver_data is NULL !\n");
1941 release_console_sem();
1942 return 0;
1943 }
1944
1945 currcons = vc->vc_num;
1946 if (!vc_cons_allocated(currcons)) {
1947 /* could this happen? */
1948 static int error = 0;
1949 if (!error) {
1950 error = 1;
1951 printk("con_write: tty %d not allocated\n", currcons+1);
1952 }
1953 release_console_sem();
1954 return 0;
1955 }
1956 release_console_sem();
1957
1958 orig_buf = buf;
1959 orig_count = count;
1960
1961 /* At this point 'buf' is guaranteed to be a kernel buffer
1962 * and therefore no access to userspace (and therefore sleeping)
1963 * will be needed. The con_buf_sem serializes all tty based
1964 * console rendering and vcs write/read operations. We hold
1965 * the console spinlock during the entire write.
1966 */
1967
1968 acquire_console_sem();
1969
1970 vc = tty->driver_data;
1971 if (vc == NULL) {
1972 printk(KERN_ERR "vt: argh, driver_data _became_ NULL !\n");
1973 release_console_sem();
1974 goto out;
1975 }
1976
1977 himask = vc->vc_hi_font_mask;
1978 charmask = himask ? 0x1ff : 0xff;
1979
1980 /* undraw cursor first */
1981 if (IS_FG(vc))
1982 hide_cursor(vc);
1983
1984 while (!tty->stopped && count) {
1985 int orig = *buf;
1986 c = orig;
1987 buf++;
1988 n++;
1989 count--;
1990
1991 /* Do no translation at all in control states */
1992 if (vc->vc_state != ESnormal) {
1993 tc = c;
1994 } else if (vc->vc_utf) {
1995 /* Combine UTF-8 into Unicode */
1996 /* Incomplete characters silently ignored */
1997 if(c > 0x7f) {
1998 if (vc->vc_utf_count > 0 && (c & 0xc0) == 0x80) {
1999 vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f);
2000 vc->vc_utf_count--;
2001 if (vc->vc_utf_count == 0)
2002 tc = c = vc->vc_utf_char;
2003 else continue;
2004 } else {
2005 if ((c & 0xe0) == 0xc0) {
2006 vc->vc_utf_count = 1;
2007 vc->vc_utf_char = (c & 0x1f);
2008 } else if ((c & 0xf0) == 0xe0) {
2009 vc->vc_utf_count = 2;
2010 vc->vc_utf_char = (c & 0x0f);
2011 } else if ((c & 0xf8) == 0xf0) {
2012 vc->vc_utf_count = 3;
2013 vc->vc_utf_char = (c & 0x07);
2014 } else if ((c & 0xfc) == 0xf8) {
2015 vc->vc_utf_count = 4;
2016 vc->vc_utf_char = (c & 0x03);
2017 } else if ((c & 0xfe) == 0xfc) {
2018 vc->vc_utf_count = 5;
2019 vc->vc_utf_char = (c & 0x01);
2020 } else
2021 vc->vc_utf_count = 0;
2022 continue;
2023 }
2024 } else {
2025 tc = c;
2026 vc->vc_utf_count = 0;
2027 }
2028 } else { /* no utf */
2029 tc = vc->vc_translate[vc->vc_toggle_meta ? (c | 0x80) : c];
2030 }
2031
2032 /* If the original code was a control character we
2033 * only allow a glyph to be displayed if the code is
2034 * not normally used (such as for cursor movement) or
2035 * if the disp_ctrl mode has been explicitly enabled.
2036 * Certain characters (as given by the CTRL_ALWAYS
2037 * bitmap) are always displayed as control characters,
2038 * as the console would be pretty useless without
2039 * them; to display an arbitrary font position use the
2040 * direct-to-font zone in UTF-8 mode.
2041 */
2042 ok = tc && (c >= 32 ||
2043 (!vc->vc_utf && !(((vc->vc_disp_ctrl ? CTRL_ALWAYS
2044 : CTRL_ACTION) >> c) & 1)))
2045 && (c != 127 || vc->vc_disp_ctrl)
2046 && (c != 128+27);
2047
2048 if (vc->vc_state == ESnormal && ok) {
2049 /* Now try to find out how to display it */
2050 tc = conv_uni_to_pc(vc, tc);
2051 if ( tc == -4 ) {
2052 /* If we got -4 (not found) then see if we have
2053 defined a replacement character (U+FFFD) */
2054 tc = conv_uni_to_pc(vc, 0xfffd);
2055
2056 /* One reason for the -4 can be that we just
2057 did a clear_unimap();
2058 try at least to show something. */
2059 if (tc == -4)
2060 tc = c;
2061 } else if ( tc == -3 ) {
2062 /* Bad hash table -- hope for the best */
2063 tc = c;
2064 }
2065 if (tc & ~charmask)
2066 continue; /* Conversion failed */
2067
2068 if (vc->vc_need_wrap || vc->vc_decim)
2069 FLUSH
2070 if (vc->vc_need_wrap) {
2071 cr(vc);
2072 lf(vc);
2073 }
2074 if (vc->vc_decim)
2075 insert_char(vc, 1);
2076 scr_writew(himask ?
2077 ((vc->vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) :
2078 (vc->vc_attr << 8) + tc,
2079 (u16 *) vc->vc_pos);
2080 if (DO_UPDATE(vc) && draw_x < 0) {
2081 draw_x = vc->vc_x;
2082 draw_from = vc->vc_pos;
2083 }
2084 if (vc->vc_x == vc->vc_cols - 1) {
2085 vc->vc_need_wrap = vc->vc_decawm;
2086 draw_to = vc->vc_pos + 2;
2087 } else {
2088 vc->vc_x++;
2089 draw_to = (vc->vc_pos += 2);
2090 }
2091 continue;
2092 }
2093 FLUSH
2094 do_con_trol(tty, vc, orig);
2095 }
2096 FLUSH
2097 console_conditional_schedule();
2098 release_console_sem();
2099
2100out:
2101 return n;
2102#undef FLUSH
2103}
2104
2105/*
2106 * This is the console switching callback.
2107 *
2108 * Doing console switching in a process context allows
2109 * us to do the switches asynchronously (needed when we want
2110 * to switch due to a keyboard interrupt). Synchronization
2111 * with other console code and prevention of re-entrancy is
2112 * ensured with console_sem.
2113 */
2114static void console_callback(void *ignored)
2115{
2116 acquire_console_sem();
2117
2118 if (want_console >= 0) {
2119 if (want_console != fg_console &&
2120 vc_cons_allocated(want_console)) {
2121 hide_cursor(vc_cons[fg_console].d);
2122 change_console(vc_cons[want_console].d);
2123 /* we only changed when the console had already
2124 been allocated - a new console is not created
2125 in an interrupt routine */
2126 }
2127 want_console = -1;
2128 }
2129 if (do_poke_blanked_console) { /* do not unblank for a LED change */
2130 do_poke_blanked_console = 0;
2131 poke_blanked_console();
2132 }
2133 if (scrollback_delta) {
2134 struct vc_data *vc = vc_cons[fg_console].d;
2135 clear_selection();
2136 if (vc->vc_mode == KD_TEXT)
2137 vc->vc_sw->con_scrolldelta(vc, scrollback_delta);
2138 scrollback_delta = 0;
2139 }
2140 if (blank_timer_expired) {
2141 do_blank_screen(0);
2142 blank_timer_expired = 0;
2143 }
2144
2145 release_console_sem();
2146}
2147
2148void set_console(int nr)
2149{
2150 want_console = nr;
2151 schedule_console_callback();
2152}
2153
2154struct tty_driver *console_driver;
2155
2156#ifdef CONFIG_VT_CONSOLE
2157
2158/*
2159 * Console on virtual terminal
2160 *
2161 * The console must be locked when we get here.
2162 */
2163
2164static void vt_console_print(struct console *co, const char *b, unsigned count)
2165{
2166 struct vc_data *vc = vc_cons[fg_console].d;
2167 unsigned char c;
2168 static unsigned long printing;
2169 const ushort *start;
2170 ushort cnt = 0;
2171 ushort myx;
2172
2173 /* console busy or not yet initialized */
2174 if (!printable || test_and_set_bit(0, &printing))
2175 return;
2176
2177 if (kmsg_redirect && vc_cons_allocated(kmsg_redirect - 1))
2178 vc = vc_cons[kmsg_redirect - 1].d;
2179
2180 /* read `x' only after setting currcons properly (otherwise
2181 the `x' macro will read the x of the foreground console). */
2182 myx = vc->vc_x;
2183
2184 if (!vc_cons_allocated(fg_console)) {
2185 /* impossible */
2186 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2187 goto quit;
2188 }
2189
2190 if (vc->vc_mode != KD_TEXT)
2191 goto quit;
2192
2193 /* undraw cursor first */
2194 if (IS_FG(vc))
2195 hide_cursor(vc);
2196
2197 start = (ushort *)vc->vc_pos;
2198
2199 /* Contrived structure to try to emulate original need_wrap behaviour
2200 * Problems caused when we have need_wrap set on '\n' character */
2201 while (count--) {
2202 c = *b++;
2203 if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) {
2204 if (cnt > 0) {
2205 if (CON_IS_VISIBLE(vc))
2206 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2207 vc->vc_x += cnt;
2208 if (vc->vc_need_wrap)
2209 vc->vc_x--;
2210 cnt = 0;
2211 }
2212 if (c == 8) { /* backspace */
2213 bs(vc);
2214 start = (ushort *)vc->vc_pos;
2215 myx = vc->vc_x;
2216 continue;
2217 }
2218 if (c != 13)
2219 lf(vc);
2220 cr(vc);
2221 start = (ushort *)vc->vc_pos;
2222 myx = vc->vc_x;
2223 if (c == 10 || c == 13)
2224 continue;
2225 }
2226 scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos);
2227 cnt++;
2228 if (myx == vc->vc_cols - 1) {
2229 vc->vc_need_wrap = 1;
2230 continue;
2231 }
2232 vc->vc_pos += 2;
2233 myx++;
2234 }
2235 if (cnt > 0) {
2236 if (CON_IS_VISIBLE(vc))
2237 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2238 vc->vc_x += cnt;
2239 if (vc->vc_x == vc->vc_cols) {
2240 vc->vc_x--;
2241 vc->vc_need_wrap = 1;
2242 }
2243 }
2244 set_cursor(vc);
2245
2246quit:
2247 clear_bit(0, &printing);
2248}
2249
2250static struct tty_driver *vt_console_device(struct console *c, int *index)
2251{
2252 *index = c->index ? c->index-1 : fg_console;
2253 return console_driver;
2254}
2255
2256static struct console vt_console_driver = {
2257 .name = "tty",
2258 .write = vt_console_print,
2259 .device = vt_console_device,
2260 .unblank = unblank_screen,
2261 .flags = CON_PRINTBUFFER,
2262 .index = -1,
2263};
2264#endif
2265
2266/*
2267 * Handling of Linux-specific VC ioctls
2268 */
2269
2270/*
2271 * Generally a bit racy with respect to console_sem().
2272 *
2273 * There are some functions which don't need it.
2274 *
2275 * There are some functions which can sleep for arbitrary periods
2276 * (paste_selection) but we don't need the lock there anyway.
2277 *
2278 * set_selection has locking, and definitely needs it
2279 */
2280
2281int tioclinux(struct tty_struct *tty, unsigned long arg)
2282{
2283 char type, data;
2284 char __user *p = (char __user *)arg;
2285 int lines;
2286 int ret;
2287
2288 if (tty->driver->type != TTY_DRIVER_TYPE_CONSOLE)
2289 return -EINVAL;
2290 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN))
2291 return -EPERM;
2292 if (get_user(type, p))
2293 return -EFAULT;
2294 ret = 0;
2295 switch (type)
2296 {
2297 case TIOCL_SETSEL:
2298 acquire_console_sem();
2299 ret = set_selection((struct tiocl_selection __user *)(p+1), tty);
2300 release_console_sem();
2301 break;
2302 case TIOCL_PASTESEL:
2303 ret = paste_selection(tty);
2304 break;
2305 case TIOCL_UNBLANKSCREEN:
2d237c63 2306 acquire_console_sem();
1da177e4 2307 unblank_screen();
2d237c63 2308 release_console_sem();
1da177e4
LT		 2309 break;
2310 case TIOCL_SELLOADLUT:
2311 ret = sel_loadlut(p);
2312 break;
2313 case TIOCL_GETSHIFTSTATE:
2314
2315 /*
2316 * Make it possible to react to Shift+Mousebutton.
2317 * Note that 'shift_state' is an undocumented
2318 * kernel-internal variable; programs not closely
2319 * related to the kernel should not use this.
2320 */
2321 data = shift_state;
2322 ret = __put_user(data, p);
2323 break;
2324 case TIOCL_GETMOUSEREPORTING:
2325 data = mouse_reporting();
2326 ret = __put_user(data, p);
2327 break;
2328 case TIOCL_SETVESABLANK:
2329 set_vesa_blanking(p);
2330 break;
2331 case TIOCL_SETKMSGREDIRECT:
2332 if (!capable(CAP_SYS_ADMIN)) {
2333 ret = -EPERM;
2334 } else {
2335 if (get_user(data, p+1))
2336 ret = -EFAULT;
2337 else
2338 kmsg_redirect = data;
2339 }
2340 break;
2341 case TIOCL_GETFGCONSOLE:
2342 ret = fg_console;
2343 break;
2344 case TIOCL_SCROLLCONSOLE:
2345 if (get_user(lines, (s32 __user *)(p+4))) {
2346 ret = -EFAULT;
2347 } else {
2348 scrollfront(vc_cons[fg_console].d, lines);
2349 ret = 0;
2350 }
2351 break;
2352 case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
2d237c63 2353 acquire_console_sem();
1da177e4
LT		 2354 ignore_poke = 1;
2355 do_blank_screen(0);
2d237c63 2356 release_console_sem();
1da177e4
LT		 2357 break;
2358 case TIOCL_BLANKEDSCREEN:
2359 ret = console_blanked;
2360 break;
2361 default:
2362 ret = -EINVAL;
2363 break;
2364 }
2365 return ret;
2366}
2367
2368/*
2369 * /dev/ttyN handling
2370 */
2371
2372static int con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2373{
2374 int retval;
2375
2376 retval = do_con_write(tty, buf, count);
2377 con_flush_chars(tty);
2378
2379 return retval;
2380}
2381
2382static void con_put_char(struct tty_struct *tty, unsigned char ch)
2383{
2384 if (in_interrupt())
2385 return; /* n_r3964 calls put_char() from interrupt context */
2386 do_con_write(tty, &ch, 1);
2387}
2388
2389static int con_write_room(struct tty_struct *tty)
2390{
2391 if (tty->stopped)
2392 return 0;
2393 return 4096; /* No limit, really; we're not buffering */
2394}
2395
2396static int con_chars_in_buffer(struct tty_struct *tty)
2397{
2398 return 0; /* we're not buffering */
2399}
2400
2401/*
2402 * con_throttle and con_unthrottle are only used for
2403 * paste_selection(), which has to stuff in a large number of
2404 * characters...
2405 */
2406static void con_throttle(struct tty_struct *tty)
2407{
2408}
2409
2410static void con_unthrottle(struct tty_struct *tty)
2411{
2412 struct vc_data *vc = tty->driver_data;
2413
2414 wake_up_interruptible(&vc->paste_wait);
2415}
2416
2417/*
2418 * Turn the Scroll-Lock LED on when the tty is stopped
2419 */
2420static void con_stop(struct tty_struct *tty)
2421{
2422 int console_num;
2423 if (!tty)
2424 return;
2425 console_num = tty->index;
2426 if (!vc_cons_allocated(console_num))
2427 return;
2428 set_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2429 set_leds();
2430}
2431
2432/*
2433 * Turn the Scroll-Lock LED off when the console is started
2434 */
2435static void con_start(struct tty_struct *tty)
2436{
2437 int console_num;
2438 if (!tty)
2439 return;
2440 console_num = tty->index;
2441 if (!vc_cons_allocated(console_num))
2442 return;
2443 clr_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2444 set_leds();
2445}
2446
2447static void con_flush_chars(struct tty_struct *tty)
2448{
2449 struct vc_data *vc;
2450
2451 if (in_interrupt()) /* from flush_to_ldisc */
2452 return;
2453
2454 /* if we race with con_close(), vt may be null */
2455 acquire_console_sem();
2456 vc = tty->driver_data;
2457 if (vc)
2458 set_cursor(vc);
2459 release_console_sem();
2460}
2461
2462/*
2463 * Allocate the console screen memory.
2464 */
2465static int con_open(struct tty_struct *tty, struct file *filp)
2466{
2467 unsigned int currcons = tty->index;
2468 int ret = 0;
2469
2470 acquire_console_sem();
f786648b 2471 if (tty->driver_data == NULL) {
1da177e4
LT		 2472 ret = vc_allocate(currcons);
2473 if (ret == 0) {
2474 struct vc_data *vc = vc_cons[currcons].d;
2475 tty->driver_data = vc;
2476 vc->vc_tty = tty;
2477
2478 if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
2479 tty->winsize.ws_row = vc_cons[currcons].d->vc_rows;
2480 tty->winsize.ws_col = vc_cons[currcons].d->vc_cols;
2481 }
2482 release_console_sem();
2483 vcs_make_devfs(tty);
2484 return ret;
2485 }
2486 }
2487 release_console_sem();
2488 return ret;
2489}
2490
2491/*
70522e12 2492 * We take tty_mutex in here to prevent another thread from coming in via init_dev
1da177e4
LT		 2493 * and taking a ref against the tty while we're in the process of forgetting
2494 * about it and cleaning things up.
2495 *
2496 * This is because vcs_remove_devfs() can sleep and will drop the BKL.
2497 */
2498static void con_close(struct tty_struct *tty, struct file *filp)
2499{
70522e12 2500 mutex_lock(&tty_mutex);
1da177e4
LT		 2501 acquire_console_sem();
2502 if (tty && tty->count == 1) {
2503 struct vc_data *vc = tty->driver_data;
2504
2505 if (vc)
2506 vc->vc_tty = NULL;
2507 tty->driver_data = NULL;
2508 release_console_sem();
2509 vcs_remove_devfs(tty);
70522e12 2510 mutex_unlock(&tty_mutex);
1da177e4 2511 /*
70522e12 2512 * tty_mutex is released, but we still hold BKL, so there is
1da177e4
LT		 2513 * still exclusion against init_dev()
2514 */
2515 return;
2516 }
2517 release_console_sem();
70522e12 2518 mutex_unlock(&tty_mutex);
1da177e4
LT		 2519}
2520
2521static void vc_init(struct vc_data *vc, unsigned int rows,
2522 unsigned int cols, int do_clear)
2523{
2524 int j, k ;
2525
2526 vc->vc_cols = cols;
2527 vc->vc_rows = rows;
2528 vc->vc_size_row = cols << 1;
2529 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
2530
2531 set_origin(vc);
2532 vc->vc_pos = vc->vc_origin;
2533 reset_vc(vc);
2534 for (j=k=0; j<16; j++) {
2535 vc->vc_palette[k++] = default_red[j] ;
2536 vc->vc_palette[k++] = default_grn[j] ;
2537 vc->vc_palette[k++] = default_blu[j] ;
2538 }
2539 vc->vc_def_color = 0x07; /* white */
2540 vc->vc_ulcolor = 0x0f; /* bold white */
2541 vc->vc_halfcolor = 0x08; /* grey */
2542 init_waitqueue_head(&vc->paste_wait);
2543 reset_terminal(vc, do_clear);
2544}
2545
2546/*
2547 * This routine initializes console interrupts, and does nothing
2548 * else. If you want the screen to clear, call tty_write with
2549 * the appropriate escape-sequence.
2550 */
2551
2552static int __init con_init(void)
2553{
2554 const char *display_desc = NULL;
2555 struct vc_data *vc;
2556 unsigned int currcons = 0;
2557
2558 acquire_console_sem();
2559
2560 if (conswitchp)
2561 display_desc = conswitchp->con_startup();
2562 if (!display_desc) {
2563 fg_console = 0;
2564 release_console_sem();
2565 return 0;
2566 }
2567
2568 init_timer(&console_timer);
2569 console_timer.function = blank_screen_t;
2570 if (blankinterval) {
2571 blank_state = blank_normal_wait;
2572 mod_timer(&console_timer, jiffies + blankinterval);
2573 }
2574
2575 /*
2576 * kmalloc is not running yet - we use the bootmem allocator.
2577 */
2578 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) {
2579 vc_cons[currcons].d = vc = alloc_bootmem(sizeof(struct vc_data));
2580 visual_init(vc, currcons, 1);
2581 vc->vc_screenbuf = (unsigned short *)alloc_bootmem(vc->vc_screenbuf_size);
2582 vc->vc_kmalloced = 0;
2583 vc_init(vc, vc->vc_rows, vc->vc_cols,
2584 currcons || !vc->vc_sw->con_save_screen);
2585 }
2586 currcons = fg_console = 0;
2587 master_display_fg = vc = vc_cons[currcons].d;
2588 set_origin(vc);
2589 save_screen(vc);
2590 gotoxy(vc, vc->vc_x, vc->vc_y);
2591 csi_J(vc, 0);
2592 update_screen(vc);
2593 printk("Console: %s %s %dx%d",
2594 vc->vc_can_do_color ? "colour" : "mono",
2595 display_desc, vc->vc_cols, vc->vc_rows);
2596 printable = 1;
2597 printk("\n");
2598
2599 release_console_sem();
2600
2601#ifdef CONFIG_VT_CONSOLE
2602 register_console(&vt_console_driver);
2603#endif
2604 return 0;
2605}
2606console_initcall(con_init);
2607
2608static struct tty_operations con_ops = {
2609 .open = con_open,
2610 .close = con_close,
2611 .write = con_write,
2612 .write_room = con_write_room,
2613 .put_char = con_put_char,
2614 .flush_chars = con_flush_chars,
2615 .chars_in_buffer = con_chars_in_buffer,
2616 .ioctl = vt_ioctl,
2617 .stop = con_stop,
2618 .start = con_start,
2619 .throttle = con_throttle,
2620 .unthrottle = con_unthrottle,
2621};
2622
2623int __init vty_init(void)
2624{
2625 vcs_init();
2626
2627 console_driver = alloc_tty_driver(MAX_NR_CONSOLES);
2628 if (!console_driver)
2629 panic("Couldn't allocate console driver\n");
2630 console_driver->owner = THIS_MODULE;
2631 console_driver->devfs_name = "vc/";
2632 console_driver->name = "tty";
2633 console_driver->name_base = 1;
2634 console_driver->major = TTY_MAJOR;
2635 console_driver->minor_start = 1;
2636 console_driver->type = TTY_DRIVER_TYPE_CONSOLE;
2637 console_driver->init_termios = tty_std_termios;
2638 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS;
2639 tty_set_operations(console_driver, &con_ops);
2640 if (tty_register_driver(console_driver))
2641 panic("Couldn't register console driver\n");
2642
2643 kbd_init();
2644 console_map_init();
2645#ifdef CONFIG_PROM_CONSOLE
2646 prom_con_init();
2647#endif
2648#ifdef CONFIG_MDA_CONSOLE
2649 mda_console_init();
2650#endif
2651 return 0;
2652}
2653
2654#ifndef VT_SINGLE_DRIVER
2655
2656/*
2657 * If we support more console drivers, this function is used
2658 * when a driver wants to take over some existing consoles
2659 * and become default driver for newly opened ones.
2660 */
2661
2662int take_over_console(const struct consw *csw, int first, int last, int deflt)
2663{
2664 int i, j = -1;
2665 const char *desc;
2666 struct module *owner;
2667
2668 owner = csw->owner;
2669 if (!try_module_get(owner))
2670 return -ENODEV;
2671
2672 acquire_console_sem();
2673
2674 desc = csw->con_startup();
2675 if (!desc) {
2676 release_console_sem();
2677 module_put(owner);
2678 return -ENODEV;
2679 }
2680 if (deflt) {
2681 if (conswitchp)
2682 module_put(conswitchp->owner);
2683 __module_get(owner);
2684 conswitchp = csw;
2685 }
2686
2687 for (i = first; i <= last; i++) {
2688 int old_was_color;
2689 struct vc_data *vc = vc_cons[i].d;
2690
2691 if (con_driver_map[i])
2692 module_put(con_driver_map[i]->owner);
2693 __module_get(owner);
2694 con_driver_map[i] = csw;
2695
2696 if (!vc || !vc->vc_sw)
2697 continue;
2698
2699 j = i;
2700 if (CON_IS_VISIBLE(vc))
2701 save_screen(vc);
2702 old_was_color = vc->vc_can_do_color;
2703 vc->vc_sw->con_deinit(vc);
2704 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
2705 vc->vc_visible_origin = vc->vc_origin;
2706 vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size;
2707 vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x;
2708 visual_init(vc, i, 0);
2709 update_attr(vc);
2710
2711 /* If the console changed between mono <-> color, then
2712 * the attributes in the screenbuf will be wrong. The
2713 * following resets all attributes to something sane.
2714 */
2715 if (old_was_color != vc->vc_can_do_color)
2716 clear_buffer_attributes(vc);
2717
2718 if (CON_IS_VISIBLE(vc))
2719 update_screen(vc);
2720 }
2721 printk("Console: switching ");
2722 if (!deflt)
2723 printk("consoles %d-%d ", first+1, last+1);
2724 if (j >= 0)
2725 printk("to %s %s %dx%d\n",
2726 vc_cons[j].d->vc_can_do_color ? "colour" : "mono",
2727 desc, vc_cons[j].d->vc_cols, vc_cons[j].d->vc_rows);
2728 else
2729 printk("to %s\n", desc);
2730
2731 release_console_sem();
2732
2733 module_put(owner);
2734 return 0;
2735}
2736
2737void give_up_console(const struct consw *csw)
2738{
2739 int i;
2740
2741 for(i = 0; i < MAX_NR_CONSOLES; i++)
2742 if (con_driver_map[i] == csw) {
2743 module_put(csw->owner);
2744 con_driver_map[i] = NULL;
2745 }
2746}
2747
2748#endif
2749
2750/*
2751 * Screen blanking
2752 */
2753
2754static void set_vesa_blanking(char __user *p)
2755{
2756 unsigned int mode;
2757 get_user(mode, p + 1);
2758 vesa_blank_mode = (mode < 4) ? mode : 0;
2759}
2760
1da177e4
LT		 2761void do_blank_screen(int entering_gfx)
2762{
2763 struct vc_data *vc = vc_cons[fg_console].d;
2764 int i;
2765
2766 WARN_CONSOLE_UNLOCKED();
2767
2768 if (console_blanked) {
2769 if (blank_state == blank_vesa_wait) {
2770 blank_state = blank_off;
d060a321 2771 vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0);
1da177e4
LT		 2772 }
2773 return;
2774 }
2775 if (blank_state != blank_normal_wait)
2776 return;
2777 blank_state = blank_off;
2778
2779 /* entering graphics mode? */
2780 if (entering_gfx) {
2781 hide_cursor(vc);
2782 save_screen(vc);
2783 vc->vc_sw->con_blank(vc, -1, 1);
2784 console_blanked = fg_console + 1;
2785 set_origin(vc);
2786 return;
2787 }
2788
2789 /* don't blank graphics */
2790 if (vc->vc_mode != KD_TEXT) {
2791 console_blanked = fg_console + 1;
2792 return;
2793 }
2794
2795 hide_cursor(vc);
2796 del_timer_sync(&console_timer);
2797 blank_timer_expired = 0;
2798
2799 save_screen(vc);
2800 /* In case we need to reset origin, blanking hook returns 1 */
d060a321 2801 i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0);
1da177e4
LT		 2802 console_blanked = fg_console + 1;
2803 if (i)
2804 set_origin(vc);
2805
2806 if (console_blank_hook && console_blank_hook(1))
2807 return;
2808
d060a321 2809 if (vesa_off_interval && vesa_blank_mode) {
030babac 2810 blank_state = blank_vesa_wait;
1da177e4
LT		 2811 mod_timer(&console_timer, jiffies + vesa_off_interval);
2812 }
1da177e4
LT		 2813}
2814EXPORT_SYMBOL(do_blank_screen);
2815
2816/*
2817 * Called by timer as well as from vt_console_driver
2818 */
2819void do_unblank_screen(int leaving_gfx)
2820{
2821 struct vc_data *vc;
2822
2823 /* This should now always be called from a "sane" (read: can schedule)
2824 * context for the sake of the low level drivers, except in the special
2825 * case of oops_in_progress
2826 */
2827 if (!oops_in_progress)
2828 might_sleep();
2829
2830 WARN_CONSOLE_UNLOCKED();
2831
2832 ignore_poke = 0;
2833 if (!console_blanked)
2834 return;
2835 if (!vc_cons_allocated(fg_console)) {
2836 /* impossible */
2837 printk("unblank_screen: tty %d not allocated ??\n", fg_console+1);
2838 return;
2839 }
2840 vc = vc_cons[fg_console].d;
2841 if (vc->vc_mode != KD_TEXT)
2842 return; /* but leave console_blanked != 0 */
2843
2844 if (blankinterval) {
2845 mod_timer(&console_timer, jiffies + blankinterval);
2846 blank_state = blank_normal_wait;
2847 }
2848
2849 console_blanked = 0;
2850 if (vc->vc_sw->con_blank(vc, 0, leaving_gfx))
2851 /* Low-level driver cannot restore -> do it ourselves */
2852 update_screen(vc);
2853 if (console_blank_hook)
2854 console_blank_hook(0);
2855 set_palette(vc);
2856 set_cursor(vc);
2857}
2858EXPORT_SYMBOL(do_unblank_screen);
2859
2860/*
2861 * This is called by the outside world to cause a forced unblank, mostly for
2862 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
2863 * call it with 1 as an argument and so force a mode restore... that may kill
2864 * X or at least garbage the screen but would also make the Oops visible...
2865 */
2866void unblank_screen(void)
2867{
2868 do_unblank_screen(0);
2869}
2870
2871/*
70522e12 2872 * We defer the timer blanking to work queue so it can take the console mutex
1da177e4 2873 * (console operations can still happen at irq time, but only from printk which
70522e12 2874 * has the console mutex. Not perfect yet, but better than no locking
1da177e4
LT		 2875 */
2876static void blank_screen_t(unsigned long dummy)
2877{
cc63b1e1
JB		 2878 if (unlikely(!keventd_up())) {
2879 mod_timer(&console_timer, jiffies + blankinterval);
2880 return;
2881 }
1da177e4
LT		 2882 blank_timer_expired = 1;
2883 schedule_work(&console_work);
2884}
2885
2886void poke_blanked_console(void)
2887{
2888 WARN_CONSOLE_UNLOCKED();
2889
2890 /* Add this so we quickly catch whoever might call us in a non
2891 * safe context. Nowadays, unblank_screen() isn't to be called in
2892 * atomic contexts and is allowed to schedule (with the special case
2893 * of oops_in_progress, but that isn't of any concern for this
2894 * function. --BenH.
2895 */
2896 might_sleep();
2897
2898 /* This isn't perfectly race free, but a race here would be mostly harmless,
2899 * at worse, we'll do a spurrious blank and it's unlikely
2900 */
2901 del_timer(&console_timer);
2902 blank_timer_expired = 0;
2903
2904 if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS)
2905 return;
2906 if (console_blanked)
2907 unblank_screen();
2908 else if (blankinterval) {
2909 mod_timer(&console_timer, jiffies + blankinterval);
2910 blank_state = blank_normal_wait;
2911 }
2912}
2913
2914/*
2915 * Palettes
2916 */
2917
2918static void set_palette(struct vc_data *vc)
2919{
2920 WARN_CONSOLE_UNLOCKED();
2921
2922 if (vc->vc_mode != KD_GRAPHICS)
2923 vc->vc_sw->con_set_palette(vc, color_table);
2924}
2925
2926static int set_get_cmap(unsigned char __user *arg, int set)
2927{
2928 int i, j, k;
2929
2930 WARN_CONSOLE_UNLOCKED();
2931
2932 for (i = 0; i < 16; i++)
2933 if (set) {
2934 get_user(default_red[i], arg++);
2935 get_user(default_grn[i], arg++);
2936 get_user(default_blu[i], arg++);
2937 } else {
2938 put_user(default_red[i], arg++);
2939 put_user(default_grn[i], arg++);
2940 put_user(default_blu[i], arg++);
2941 }
2942 if (set) {
2943 for (i = 0; i < MAX_NR_CONSOLES; i++)
2944 if (vc_cons_allocated(i)) {
2945 for (j = k = 0; j < 16; j++) {
2946 vc_cons[i].d->vc_palette[k++] = default_red[j];
2947 vc_cons[i].d->vc_palette[k++] = default_grn[j];
2948 vc_cons[i].d->vc_palette[k++] = default_blu[j];
2949 }
2950 set_palette(vc_cons[i].d);
2951 }
2952 }
2953 return 0;
2954}
2955
2956/*
2957 * Load palette into the DAC registers. arg points to a colour
2958 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
2959 */
2960
2961int con_set_cmap(unsigned char __user *arg)
2962{
2963 int rc;
2964
2965 acquire_console_sem();
2966 rc = set_get_cmap (arg,1);
2967 release_console_sem();
2968
2969 return rc;
2970}
2971
2972int con_get_cmap(unsigned char __user *arg)
2973{
2974 int rc;
2975
2976 acquire_console_sem();
2977 rc = set_get_cmap (arg,0);
2978 release_console_sem();
2979
2980 return rc;
2981}
2982
2983void reset_palette(struct vc_data *vc)
2984{
2985 int j, k;
2986 for (j=k=0; j<16; j++) {
2987 vc->vc_palette[k++] = default_red[j];
2988 vc->vc_palette[k++] = default_grn[j];
2989 vc->vc_palette[k++] = default_blu[j];
2990 }
2991 set_palette(vc);
2992}
2993
2994/*
2995 * Font switching
2996 *
2997 * Currently we only support fonts up to 32 pixels wide, at a maximum height
2998 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
2999 * depending on width) reserved for each character which is kinda wasty, but
3000 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
3001 * is upto the actual low-level console-driver convert data into its favorite
3002 * format (maybe we should add a `fontoffset' field to the `display'
3003 * structure so we won't have to convert the fontdata all the time.
3004 * /Jes
3005 */
3006
3007#define max_font_size 65536
3008
3009static int con_font_get(struct vc_data *vc, struct console_font_op *op)
3010{
3011 struct console_font font;
3012 int rc = -EINVAL;
3013 int c;
3014
3015 if (vc->vc_mode != KD_TEXT)
3016 return -EINVAL;
3017
3018 if (op->data) {
3019 font.data = kmalloc(max_font_size, GFP_KERNEL);
3020 if (!font.data)
3021 return -ENOMEM;
3022 } else
3023 font.data = NULL;
3024
3025 acquire_console_sem();
3026 if (vc->vc_sw->con_font_get)
3027 rc = vc->vc_sw->con_font_get(vc, &font);
3028 else
3029 rc = -ENOSYS;
3030 release_console_sem();
3031
3032 if (rc)
3033 goto out;
3034
3035 c = (font.width+7)/8 * 32 * font.charcount;
3036
3037 if (op->data && font.charcount > op->charcount)
3038 rc = -ENOSPC;
3039 if (!(op->flags & KD_FONT_FLAG_OLD)) {
3040 if (font.width > op->width || font.height > op->height)
3041 rc = -ENOSPC;
3042 } else {
3043 if (font.width != 8)
3044 rc = -EIO;
3045 else if ((op->height && font.height > op->height) ||
3046 font.height > 32)
3047 rc = -ENOSPC;
3048 }
3049 if (rc)
3050 goto out;
3051
3052 op->height = font.height;
3053 op->width = font.width;
3054 op->charcount = font.charcount;
3055
3056 if (op->data && copy_to_user(op->data, font.data, c))
3057 rc = -EFAULT;
3058
3059out:
3060 kfree(font.data);
3061 return rc;
3062}
3063
3064static int con_font_set(struct vc_data *vc, struct console_font_op *op)
3065{
3066 struct console_font font;
3067 int rc = -EINVAL;
3068 int size;
3069
3070 if (vc->vc_mode != KD_TEXT)
3071 return -EINVAL;
3072 if (!op->data)
3073 return -EINVAL;
3074 if (op->charcount > 512)
3075 return -EINVAL;
3076 if (!op->height) { /* Need to guess font height [compat] */
3077 int h, i;
3078 u8 __user *charmap = op->data;
3079 u8 tmp;
3080
3081 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
3082 so that we can get rid of this soon */
3083 if (!(op->flags & KD_FONT_FLAG_OLD))
3084 return -EINVAL;
3085 for (h = 32; h > 0; h--)
3086 for (i = 0; i < op->charcount; i++) {
3087 if (get_user(tmp, &charmap[32*i+h-1]))
3088 return -EFAULT;
3089 if (tmp)
3090 goto nonzero;
3091 }
3092 return -EINVAL;
3093 nonzero:
3094 op->height = h;
3095 }
3096 if (op->width <= 0 || op->width > 32 || op->height > 32)
3097 return -EINVAL;
3098 size = (op->width+7)/8 * 32 * op->charcount;
3099 if (size > max_font_size)
3100 return -ENOSPC;
3101 font.charcount = op->charcount;
3102 font.height = op->height;
3103 font.width = op->width;
3104 font.data = kmalloc(size, GFP_KERNEL);
3105 if (!font.data)
3106 return -ENOMEM;
3107 if (copy_from_user(font.data, op->data, size)) {
3108 kfree(font.data);
3109 return -EFAULT;
3110 }
3111 acquire_console_sem();
3112 if (vc->vc_sw->con_font_set)
3113 rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
3114 else
3115 rc = -ENOSYS;
3116 release_console_sem();
3117 kfree(font.data);
3118 return rc;
3119}
3120
3121static int con_font_default(struct vc_data *vc, struct console_font_op *op)
3122{
3123 struct console_font font = {.width = op->width, .height = op->height};
3124 char name[MAX_FONT_NAME];
3125 char *s = name;
3126 int rc;
3127
3128 if (vc->vc_mode != KD_TEXT)
3129 return -EINVAL;
3130
3131 if (!op->data)
3132 s = NULL;
3133 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0)
3134 return -EFAULT;
3135 else
3136 name[MAX_FONT_NAME - 1] = 0;
3137
3138 acquire_console_sem();
3139 if (vc->vc_sw->con_font_default)
3140 rc = vc->vc_sw->con_font_default(vc, &font, s);
3141 else
3142 rc = -ENOSYS;
3143 release_console_sem();
3144 if (!rc) {
3145 op->width = font.width;
3146 op->height = font.height;
3147 }
3148 return rc;
3149}
3150
3151static int con_font_copy(struct vc_data *vc, struct console_font_op *op)
3152{
3153 int con = op->height;
3154 int rc;
3155
3156 if (vc->vc_mode != KD_TEXT)
3157 return -EINVAL;
3158
3159 acquire_console_sem();
3160 if (!vc->vc_sw->con_font_copy)
3161 rc = -ENOSYS;
3162 else if (con < 0 || !vc_cons_allocated(con))
3163 rc = -ENOTTY;
3164 else if (con == vc->vc_num) /* nothing to do */
3165 rc = 0;
3166 else
3167 rc = vc->vc_sw->con_font_copy(vc, con);
3168 release_console_sem();
3169 return rc;
3170}
3171
3172int con_font_op(struct vc_data *vc, struct console_font_op *op)
3173{
3174 switch (op->op) {
3175 case KD_FONT_OP_SET:
3176 return con_font_set(vc, op);
3177 case KD_FONT_OP_GET:
3178 return con_font_get(vc, op);
3179 case KD_FONT_OP_SET_DEFAULT:
3180 return con_font_default(vc, op);
3181 case KD_FONT_OP_COPY:
3182 return con_font_copy(vc, op);
3183 }
3184 return -ENOSYS;
3185}
3186
3187/*
3188 * Interface exported to selection and vcs.
3189 */
3190
3191/* used by selection */
3192u16 screen_glyph(struct vc_data *vc, int offset)
3193{
3194 u16 w = scr_readw(screenpos(vc, offset, 1));
3195 u16 c = w & 0xff;
3196
3197 if (w & vc->vc_hi_font_mask)
3198 c |= 0x100;
3199 return c;
3200}
3201
3202/* used by vcs - note the word offset */
3203unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed)
3204{
3205 return screenpos(vc, 2 * w_offset, viewed);
3206}
3207
3208void getconsxy(struct vc_data *vc, unsigned char *p)
3209{
3210 p[0] = vc->vc_x;
3211 p[1] = vc->vc_y;
3212}
3213
3214void putconsxy(struct vc_data *vc, unsigned char *p)
3215{
9477e260 3216 hide_cursor(vc);
1da177e4
LT		 3217 gotoxy(vc, p[0], p[1]);
3218 set_cursor(vc);
3219}
3220
3221u16 vcs_scr_readw(struct vc_data *vc, const u16 *org)
3222{
3223 if ((unsigned long)org == vc->vc_pos && softcursor_original != -1)
3224 return softcursor_original;
3225 return scr_readw(org);
3226}
3227
3228void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org)
3229{
3230 scr_writew(val, org);
3231 if ((unsigned long)org == vc->vc_pos) {
3232 softcursor_original = -1;
3233 add_softcursor(vc);
3234 }
3235}
3236
ff4da2e2
RW		 3237int is_console_suspend_safe(void)
3238{
3239 /* It is unsafe to suspend devices while X has control of the
3240 * hardware. Make sure we are running on a kernel-controlled console.
3241 */
3242 return vc_cons[fg_console].d->vc_mode == KD_TEXT;
3243}
3244
1da177e4
LT		 3245/*
3246 * Visible symbols for modules
3247 */
3248
3249EXPORT_SYMBOL(color_table);
3250EXPORT_SYMBOL(default_red);
3251EXPORT_SYMBOL(default_grn);
3252EXPORT_SYMBOL(default_blu);
3253EXPORT_SYMBOL(update_region);
3254EXPORT_SYMBOL(redraw_screen);
3255EXPORT_SYMBOL(vc_resize);
3256EXPORT_SYMBOL(fg_console);
3257EXPORT_SYMBOL(console_blank_hook);
3258EXPORT_SYMBOL(console_blanked);
3259EXPORT_SYMBOL(vc_cons);
3260#ifndef VT_SINGLE_DRIVER
3261EXPORT_SYMBOL(take_over_console);
3262EXPORT_SYMBOL(give_up_console);
3263#endif
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