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[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 * <[email protected]>
20 *
21 * Rudimentary ISO 10646/Unicode/UTF-8 character set support by
22 * Markus Kuhn, <[email protected]>.
23 *
24 * Dynamic allocation of consoles, [email protected], May 1994
25 * Resizing of consoles, aeb, 940926
26 *
27 * Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94
28 * <[email protected]>
29 *
30 * User-defined bell sound, new setterm control sequences and printk
31 * redirection by Martin Mares <[email protected]> 19-Nov-95
32 *
33 * APM screenblank bug fixed Takashi Manabe <[email protected]>
34 *
35 * Merge with the abstract console driver by Geert Uytterhoeven
36 * <[email protected]>, Jan 1997.
37 *
38 * Original m68k console driver modifications by
39 *
40 * - Arno Griffioen <[email protected]>
41 * - David Carter <[email protected]>
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 <[email protected]>, August 1997
54 *
55 * Ported to i386 and con_scrolldelta fixed
56 * by Emmanuel Marty <[email protected]>, April 1998
57 *
58 * Resurrected character buffers in videoram plus lots of other trickery
59 * by Martin Mares <[email protected]>, July 1998
60 *
61 * Removed old-style timers, introduced console_timer, made timer
62 * deletion SMP-safe. 17Jun00, Andrew Morton <[email protected]>
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;
754 unsigned short *newscreen;
755
756 WARN_CONSOLE_UNLOCKED();
757
758 if (!vc)
759 return -ENXIO;
760
761 if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW)
762 return -EINVAL;
763
764 new_cols = (cols ? cols : vc->vc_cols);
765 new_rows = (lines ? lines : vc->vc_rows);
766 new_row_size = new_cols << 1;
767 new_screen_size = new_row_size * new_rows;
768
769 if (new_cols == vc->vc_cols && new_rows == vc->vc_rows)
770 return 0;
771
772 newscreen = (unsigned short *) kmalloc(new_screen_size, GFP_USER);
773 if (!newscreen)
774 return -ENOMEM;
775
776 old_rows = vc->vc_rows;
777 old_cols = vc->vc_cols;
778 old_row_size = vc->vc_size_row;
779 old_screen_size = vc->vc_screenbuf_size;
780
781 err = resize_screen(vc, new_cols, new_rows);
782 if (err) {
783 kfree(newscreen);
784 return err;
785 }
786
787 vc->vc_rows = new_rows;
788 vc->vc_cols = new_cols;
789 vc->vc_size_row = new_row_size;
790 vc->vc_screenbuf_size = new_screen_size;
791
792 rlth = min(old_row_size, new_row_size);
793 rrem = new_row_size - rlth;
794 old_origin = vc->vc_origin;
795 new_origin = (long) newscreen;
796 new_scr_end = new_origin + new_screen_size;
797 if (new_rows < old_rows)
798 old_origin += (old_rows - new_rows) * old_row_size;
799
800 update_attr(vc);
801
802 while (old_origin < vc->vc_scr_end) {
803 scr_memcpyw((unsigned short *) new_origin, (unsigned short *) old_origin, rlth);
804 if (rrem)
805 scr_memsetw((void *)(new_origin + rlth), vc->vc_video_erase_char, rrem);
806 old_origin += old_row_size;
807 new_origin += new_row_size;
808 }
809 if (new_scr_end > new_origin)
810 scr_memsetw((void *)new_origin, vc->vc_video_erase_char, new_scr_end - new_origin);
811 if (vc->vc_kmalloced)
812 kfree(vc->vc_screenbuf);
813 vc->vc_screenbuf = newscreen;
814 vc->vc_kmalloced = 1;
815 vc->vc_screenbuf_size = new_screen_size;
816 set_origin(vc);
817
818 /* do part of a reset_terminal() */
819 vc->vc_top = 0;
820 vc->vc_bottom = vc->vc_rows;
821 gotoxy(vc, vc->vc_x, vc->vc_y);
822 save_cur(vc);
823
824 if (vc->vc_tty) {
825 struct winsize ws, *cws = &vc->vc_tty->winsize;
826
827 memset(&ws, 0, sizeof(ws));
828 ws.ws_row = vc->vc_rows;
829 ws.ws_col = vc->vc_cols;
830 ws.ws_ypixel = vc->vc_scan_lines;
831 if ((ws.ws_row != cws->ws_row || ws.ws_col != cws->ws_col) &&
832 vc->vc_tty->pgrp > 0)
833 kill_pg(vc->vc_tty->pgrp, SIGWINCH, 1);
834 *cws = ws;
835 }
836
837 if (CON_IS_VISIBLE(vc))
838 update_screen(vc);
839 return err;
840}
841
842
843void vc_disallocate(unsigned int currcons)
844{
845 WARN_CONSOLE_UNLOCKED();
846
847 if (vc_cons_allocated(currcons)) {
848 struct vc_data *vc = vc_cons[currcons].d;
849 vc->vc_sw->con_deinit(vc);
850 if (vc->vc_kmalloced)
851 kfree(vc->vc_screenbuf);
852 if (currcons >= MIN_NR_CONSOLES)
853 kfree(vc);
854 vc_cons[currcons].d = NULL;
855 }
856}
857
858/*
859 * VT102 emulator
860 */
861
862#define set_kbd(vc, x) set_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
863#define clr_kbd(vc, x) clr_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
864#define is_kbd(vc, x) vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
865
866#define decarm VC_REPEAT
867#define decckm VC_CKMODE
868#define kbdapplic VC_APPLIC
869#define lnm VC_CRLF
870
871/*
872 * this is what the terminal answers to a ESC-Z or csi0c query.
873 */
874#define VT100ID "\033[?1;2c"
875#define VT102ID "\033[?6c"
876
877unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7,
878 8,12,10,14, 9,13,11,15 };
879
880/* the default colour table, for VGA+ colour systems */
881int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
882 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
883int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
884 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
885int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
886 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
887
888/*
889 * gotoxy() must verify all boundaries, because the arguments
890 * might also be negative. If the given position is out of
891 * bounds, the cursor is placed at the nearest margin.
892 */
893static void gotoxy(struct vc_data *vc, int new_x, int new_y)
894{
895 int min_y, max_y;
896
897 if (new_x < 0)
898 vc->vc_x = 0;
899 else {
900 if (new_x >= vc->vc_cols)
901 vc->vc_x = vc->vc_cols - 1;
902 else
903 vc->vc_x = new_x;
904 }
905
906 if (vc->vc_decom) {
907 min_y = vc->vc_top;
908 max_y = vc->vc_bottom;
909 } else {
910 min_y = 0;
911 max_y = vc->vc_rows;
912 }
913 if (new_y < min_y)
914 vc->vc_y = min_y;
915 else if (new_y >= max_y)
916 vc->vc_y = max_y - 1;
917 else
918 vc->vc_y = new_y;
919 vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1);
920 vc->vc_need_wrap = 0;
921}
922
923/* for absolute user moves, when decom is set */
924static void gotoxay(struct vc_data *vc, int new_x, int new_y)
925{
926 gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y);
927}
928
929void scrollback(struct vc_data *vc, int lines)
930{
931 if (!lines)
932 lines = vc->vc_rows / 2;
933 scrolldelta(-lines);
934}
935
936void scrollfront(struct vc_data *vc, int lines)
937{
938 if (!lines)
939 lines = vc->vc_rows / 2;
940 scrolldelta(lines);
941}
942
943static void lf(struct vc_data *vc)
944{
945 /* don't scroll if above bottom of scrolling region, or
946 * if below scrolling region
947 */
948 if (vc->vc_y + 1 == vc->vc_bottom)
949 scrup(vc, vc->vc_top, vc->vc_bottom, 1);
950 else if (vc->vc_y < vc->vc_rows - 1) {
951 vc->vc_y++;
952 vc->vc_pos += vc->vc_size_row;
953 }
954 vc->vc_need_wrap = 0;
955}
956
957static void ri(struct vc_data *vc)
958{
959 /* don't scroll if below top of scrolling region, or
960 * if above scrolling region
961 */
962 if (vc->vc_y == vc->vc_top)
963 scrdown(vc, vc->vc_top, vc->vc_bottom, 1);
964 else if (vc->vc_y > 0) {
965 vc->vc_y--;
966 vc->vc_pos -= vc->vc_size_row;
967 }
968 vc->vc_need_wrap = 0;
969}
970
971static inline void cr(struct vc_data *vc)
972{
973 vc->vc_pos -= vc->vc_x << 1;
974 vc->vc_need_wrap = vc->vc_x = 0;
975}
976
977static inline void bs(struct vc_data *vc)
978{
979 if (vc->vc_x) {
980 vc->vc_pos -= 2;
981 vc->vc_x--;
982 vc->vc_need_wrap = 0;
983 }
984}
985
986static inline void del(struct vc_data *vc)
987{
988 /* ignored */
989}
990
991static void csi_J(struct vc_data *vc, int vpar)
992{
993 unsigned int count;
994 unsigned short * start;
995
996 switch (vpar) {
997 case 0: /* erase from cursor to end of display */
998 count = (vc->vc_scr_end - vc->vc_pos) >> 1;
999 start = (unsigned short *)vc->vc_pos;
1000 if (DO_UPDATE(vc)) {
1001 /* do in two stages */
1002 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1003 vc->vc_cols - vc->vc_x);
1004 vc->vc_sw->con_clear(vc, vc->vc_y + 1, 0,
1005 vc->vc_rows - vc->vc_y - 1,
1006 vc->vc_cols);
1007 }
1008 break;
1009 case 1: /* erase from start to cursor */
1010 count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1;
1011 start = (unsigned short *)vc->vc_origin;
1012 if (DO_UPDATE(vc)) {
1013 /* do in two stages */
1014 vc->vc_sw->con_clear(vc, 0, 0, vc->vc_y,
1015 vc->vc_cols);
1016 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1017 vc->vc_x + 1);
1018 }
1019 break;
1020 case 2: /* erase whole display */
1021 count = vc->vc_cols * vc->vc_rows;
1022 start = (unsigned short *)vc->vc_origin;
1023 if (DO_UPDATE(vc))
1024 vc->vc_sw->con_clear(vc, 0, 0,
1025 vc->vc_rows,
1026 vc->vc_cols);
1027 break;
1028 default:
1029 return;
1030 }
1031 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1032 vc->vc_need_wrap = 0;
1033}
1034
1035static void csi_K(struct vc_data *vc, int vpar)
1036{
1037 unsigned int count;
1038 unsigned short * start;
1039
1040 switch (vpar) {
1041 case 0: /* erase from cursor to end of line */
1042 count = vc->vc_cols - vc->vc_x;
1043 start = (unsigned short *)vc->vc_pos;
1044 if (DO_UPDATE(vc))
1045 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1046 vc->vc_cols - vc->vc_x);
1047 break;
1048 case 1: /* erase from start of line to cursor */
1049 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1050 count = vc->vc_x + 1;
1051 if (DO_UPDATE(vc))
1052 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1053 vc->vc_x + 1);
1054 break;
1055 case 2: /* erase whole line */
1056 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1057 count = vc->vc_cols;
1058 if (DO_UPDATE(vc))
1059 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1060 vc->vc_cols);
1061 break;
1062 default:
1063 return;
1064 }
1065 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1066 vc->vc_need_wrap = 0;
1067}
1068
1069static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */
1070{ /* not vt100? */
1071 int count;
1072
1073 if (!vpar)
1074 vpar++;
1075 count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar;
1076
1077 scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count);
1078 if (DO_UPDATE(vc))
1079 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count);
1080 vc->vc_need_wrap = 0;
1081}
1082
1083static void default_attr(struct vc_data *vc)
1084{
1085 vc->vc_intensity = 1;
1086 vc->vc_underline = 0;
1087 vc->vc_reverse = 0;
1088 vc->vc_blink = 0;
1089 vc->vc_color = vc->vc_def_color;
1090}
1091
1092/* console_sem is held */
1093static void csi_m(struct vc_data *vc)
1094{
1095 int i;
1096
1097 for (i = 0; i <= vc->vc_npar; i++)
1098 switch (vc->vc_par[i]) {
1099 case 0: /* all attributes off */
1100 default_attr(vc);
1101 break;
1102 case 1:
1103 vc->vc_intensity = 2;
1104 break;
1105 case 2:
1106 vc->vc_intensity = 0;
1107 break;
1108 case 4:
1109 vc->vc_underline = 1;
1110 break;
1111 case 5:
1112 vc->vc_blink = 1;
1113 break;
1114 case 7:
1115 vc->vc_reverse = 1;
1116 break;
1117 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1118 * Select primary font, don't display
1119 * control chars if defined, don't set
1120 * bit 8 on output.
1121 */
1122 vc->vc_translate = set_translate(vc->vc_charset == 0
1123 ? vc->vc_G0_charset
1124 : vc->vc_G1_charset, vc);
1125 vc->vc_disp_ctrl = 0;
1126 vc->vc_toggle_meta = 0;
1127 break;
1128 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1129 * Select first alternate font, lets
1130 * chars < 32 be displayed as ROM chars.
1131 */
1132 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1133 vc->vc_disp_ctrl = 1;
1134 vc->vc_toggle_meta = 0;
1135 break;
1136 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1137 * Select second alternate font, toggle
1138 * high bit before displaying as ROM char.
1139 */
1140 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1141 vc->vc_disp_ctrl = 1;
1142 vc->vc_toggle_meta = 1;
1143 break;
1144 case 21:
1145 case 22:
1146 vc->vc_intensity = 1;
1147 break;
1148 case 24:
1149 vc->vc_underline = 0;
1150 break;
1151 case 25:
1152 vc->vc_blink = 0;
1153 break;
1154 case 27:
1155 vc->vc_reverse = 0;
1156 break;
1157 case 38: /* ANSI X3.64-1979 (SCO-ish?)
1158 * Enables underscore, white foreground
1159 * with white underscore (Linux - use
1160 * default foreground).
1161 */
1162 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1163 vc->vc_underline = 1;
1164 break;
1165 case 39: /* ANSI X3.64-1979 (SCO-ish?)
1166 * Disable underline option.
1167 * Reset colour to default? It did this
1168 * before...
1169 */
1170 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1171 vc->vc_underline = 0;
1172 break;
1173 case 49:
1174 vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f);
1175 break;
1176 default:
1177 if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37)
1178 vc->vc_color = color_table[vc->vc_par[i] - 30]
1179 | (vc->vc_color & 0xf0);
1180 else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47)
1181 vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4)
1182 | (vc->vc_color & 0x0f);
1183 break;
1184 }
1185 update_attr(vc);
1186}
1187
1188static void respond_string(const char *p, struct tty_struct *tty)
1189{
1190 while (*p) {
1191 tty_insert_flip_char(tty, *p, 0);
1192 p++;
1193 }
1194 con_schedule_flip(tty);
1195}
1196
1197static void cursor_report(struct vc_data *vc, struct tty_struct *tty)
1198{
1199 char buf[40];
1200
1201 sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1);
1202 respond_string(buf, tty);
1203}
1204
1205static inline void status_report(struct tty_struct *tty)
1206{
1207 respond_string("\033[0n", tty); /* Terminal ok */
1208}
1209
1210static inline void respond_ID(struct tty_struct * tty)
1211{
1212 respond_string(VT102ID, tty);
1213}
1214
1215void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry)
1216{
1217 char buf[8];
1218
1219 sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx),
1220 (char)('!' + mry));
1221 respond_string(buf, tty);
1222}
1223
1224/* invoked via ioctl(TIOCLINUX) and through set_selection */
1225int mouse_reporting(void)
1226{
1227 return vc_cons[fg_console].d->vc_report_mouse;
1228}
1229
1230/* console_sem is held */
1231static void set_mode(struct vc_data *vc, int on_off)
1232{
1233 int i;
1234
1235 for (i = 0; i <= vc->vc_npar; i++)
1236 if (vc->vc_ques) {
1237 switch(vc->vc_par[i]) { /* DEC private modes set/reset */
1238 case 1: /* Cursor keys send ^[Ox/^[[x */
1239 if (on_off)
1240 set_kbd(vc, decckm);
1241 else
1242 clr_kbd(vc, decckm);
1243 break;
1244 case 3: /* 80/132 mode switch unimplemented */
1245 vc->vc_deccolm = on_off;
1246#if 0
1247 vc_resize(deccolm ? 132 : 80, vc->vc_rows);
1248 /* this alone does not suffice; some user mode
1249 utility has to change the hardware regs */
1250#endif
1251 break;
1252 case 5: /* Inverted screen on/off */
1253 if (vc->vc_decscnm != on_off) {
1254 vc->vc_decscnm = on_off;
1255 invert_screen(vc, 0, vc->vc_screenbuf_size, 0);
1256 update_attr(vc);
1257 }
1258 break;
1259 case 6: /* Origin relative/absolute */
1260 vc->vc_decom = on_off;
1261 gotoxay(vc, 0, 0);
1262 break;
1263 case 7: /* Autowrap on/off */
1264 vc->vc_decawm = on_off;
1265 break;
1266 case 8: /* Autorepeat on/off */
1267 if (on_off)
1268 set_kbd(vc, decarm);
1269 else
1270 clr_kbd(vc, decarm);
1271 break;
1272 case 9:
1273 vc->vc_report_mouse = on_off ? 1 : 0;
1274 break;
1275 case 25: /* Cursor on/off */
1276 vc->vc_deccm = on_off;
1277 break;
1278 case 1000:
1279 vc->vc_report_mouse = on_off ? 2 : 0;
1280 break;
1281 }
1282 } else {
1283 switch(vc->vc_par[i]) { /* ANSI modes set/reset */
1284 case 3: /* Monitor (display ctrls) */
1285 vc->vc_disp_ctrl = on_off;
1286 break;
1287 case 4: /* Insert Mode on/off */
1288 vc->vc_decim = on_off;
1289 break;
1290 case 20: /* Lf, Enter == CrLf/Lf */
1291 if (on_off)
1292 set_kbd(vc, lnm);
1293 else
1294 clr_kbd(vc, lnm);
1295 break;
1296 }
1297 }
1298}
1299
1300/* console_sem is held */
1301static void setterm_command(struct vc_data *vc)
1302{
1303 switch(vc->vc_par[0]) {
1304 case 1: /* set color for underline mode */
1305 if (vc->vc_can_do_color &&
1306 vc->vc_par[1] < 16) {
1307 vc->vc_ulcolor = color_table[vc->vc_par[1]];
1308 if (vc->vc_underline)
1309 update_attr(vc);
1310 }
1311 break;
1312 case 2: /* set color for half intensity mode */
1313 if (vc->vc_can_do_color &&
1314 vc->vc_par[1] < 16) {
1315 vc->vc_halfcolor = color_table[vc->vc_par[1]];
1316 if (vc->vc_intensity == 0)
1317 update_attr(vc);
1318 }
1319 break;
1320 case 8: /* store colors as defaults */
1321 vc->vc_def_color = vc->vc_attr;
1322 if (vc->vc_hi_font_mask == 0x100)
1323 vc->vc_def_color >>= 1;
1324 default_attr(vc);
1325 update_attr(vc);
1326 break;
1327 case 9: /* set blanking interval */
1328 blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1329 poke_blanked_console();
1330 break;
1331 case 10: /* set bell frequency in Hz */
1332 if (vc->vc_npar >= 1)
1333 vc->vc_bell_pitch = vc->vc_par[1];
1334 else
1335 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1336 break;
1337 case 11: /* set bell duration in msec */
1338 if (vc->vc_npar >= 1)
1339 vc->vc_bell_duration = (vc->vc_par[1] < 2000) ?
1340 vc->vc_par[1] * HZ / 1000 : 0;
1341 else
1342 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1343 break;
1344 case 12: /* bring specified console to the front */
1345 if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1))
1346 set_console(vc->vc_par[1] - 1);
1347 break;
1348 case 13: /* unblank the screen */
1349 poke_blanked_console();
1350 break;
1351 case 14: /* set vesa powerdown interval */
1352 vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1353 break;
1354 case 15: /* activate the previous console */
1355 set_console(last_console);
1356 break;
1357 }
1358}
1359
1360/* console_sem is held */
1361static void csi_at(struct vc_data *vc, unsigned int nr)
1362{
1363 if (nr > vc->vc_cols - vc->vc_x)
1364 nr = vc->vc_cols - vc->vc_x;
1365 else if (!nr)
1366 nr = 1;
1367 insert_char(vc, nr);
1368}
1369
1370/* console_sem is held */
1371static void csi_L(struct vc_data *vc, unsigned int nr)
1372{
1373 if (nr > vc->vc_rows - vc->vc_y)
1374 nr = vc->vc_rows - vc->vc_y;
1375 else if (!nr)
1376 nr = 1;
1377 scrdown(vc, vc->vc_y, vc->vc_bottom, nr);
1378 vc->vc_need_wrap = 0;
1379}
1380
1381/* console_sem is held */
1382static void csi_P(struct vc_data *vc, unsigned int nr)
1383{
1384 if (nr > vc->vc_cols - vc->vc_x)
1385 nr = vc->vc_cols - vc->vc_x;
1386 else if (!nr)
1387 nr = 1;
1388 delete_char(vc, nr);
1389}
1390
1391/* console_sem is held */
1392static void csi_M(struct vc_data *vc, unsigned int nr)
1393{
1394 if (nr > vc->vc_rows - vc->vc_y)
1395 nr = vc->vc_rows - vc->vc_y;
1396 else if (!nr)
1397 nr=1;
1398 scrup(vc, vc->vc_y, vc->vc_bottom, nr);
1399 vc->vc_need_wrap = 0;
1400}
1401
1402/* console_sem is held (except via vc_init->reset_terminal */
1403static void save_cur(struct vc_data *vc)
1404{
1405 vc->vc_saved_x = vc->vc_x;
1406 vc->vc_saved_y = vc->vc_y;
1407 vc->vc_s_intensity = vc->vc_intensity;
1408 vc->vc_s_underline = vc->vc_underline;
1409 vc->vc_s_blink = vc->vc_blink;
1410 vc->vc_s_reverse = vc->vc_reverse;
1411 vc->vc_s_charset = vc->vc_charset;
1412 vc->vc_s_color = vc->vc_color;
1413 vc->vc_saved_G0 = vc->vc_G0_charset;
1414 vc->vc_saved_G1 = vc->vc_G1_charset;
1415}
1416
1417/* console_sem is held */
1418static void restore_cur(struct vc_data *vc)
1419{
1420 gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y);
1421 vc->vc_intensity = vc->vc_s_intensity;
1422 vc->vc_underline = vc->vc_s_underline;
1423 vc->vc_blink = vc->vc_s_blink;
1424 vc->vc_reverse = vc->vc_s_reverse;
1425 vc->vc_charset = vc->vc_s_charset;
1426 vc->vc_color = vc->vc_s_color;
1427 vc->vc_G0_charset = vc->vc_saved_G0;
1428 vc->vc_G1_charset = vc->vc_saved_G1;
1429 vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc);
1430 update_attr(vc);
1431 vc->vc_need_wrap = 0;
1432}
1433
1434enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey,
1435 EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd,
1436 ESpalette };
1437
1438/* console_sem is held (except via vc_init()) */
1439static void reset_terminal(struct vc_data *vc, int do_clear)
1440{
1441 vc->vc_top = 0;
1442 vc->vc_bottom = vc->vc_rows;
1443 vc->vc_state = ESnormal;
1444 vc->vc_ques = 0;
1445 vc->vc_translate = set_translate(LAT1_MAP, vc);
1446 vc->vc_G0_charset = LAT1_MAP;
1447 vc->vc_G1_charset = GRAF_MAP;
1448 vc->vc_charset = 0;
1449 vc->vc_need_wrap = 0;
1450 vc->vc_report_mouse = 0;
1451 vc->vc_utf = 0;
1452 vc->vc_utf_count = 0;
1453
1454 vc->vc_disp_ctrl = 0;
1455 vc->vc_toggle_meta = 0;
1456
1457 vc->vc_decscnm = 0;
1458 vc->vc_decom = 0;
1459 vc->vc_decawm = 1;
1460 vc->vc_deccm = 1;
1461 vc->vc_decim = 0;
1462
1463 set_kbd(vc, decarm);
1464 clr_kbd(vc, decckm);
1465 clr_kbd(vc, kbdapplic);
1466 clr_kbd(vc, lnm);
1467 kbd_table[vc->vc_num].lockstate = 0;
1468 kbd_table[vc->vc_num].slockstate = 0;
1469 kbd_table[vc->vc_num].ledmode = LED_SHOW_FLAGS;
1470 kbd_table[vc->vc_num].ledflagstate = kbd_table[vc->vc_num].default_ledflagstate;
1471 /* do not do set_leds here because this causes an endless tasklet loop
1472 when the keyboard hasn't been initialized yet */
1473
1474 vc->vc_cursor_type = CUR_DEFAULT;
1475 vc->vc_complement_mask = vc->vc_s_complement_mask;
1476
1477 default_attr(vc);
1478 update_attr(vc);
1479
1480 vc->vc_tab_stop[0] = 0x01010100;
1481 vc->vc_tab_stop[1] =
1482 vc->vc_tab_stop[2] =
1483 vc->vc_tab_stop[3] =
1484 vc->vc_tab_stop[4] = 0x01010101;
1485
1486 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1487 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1488
1489 gotoxy(vc, 0, 0);
1490 save_cur(vc);
1491 if (do_clear)
1492 csi_J(vc, 2);
1493}
1494
1495/* console_sem is held */
1496static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
1497{
1498 /*
1499 * Control characters can be used in the _middle_
1500 * of an escape sequence.
1501 */
1502 switch (c) {
1503 case 0:
1504 return;
1505 case 7:
1506 if (vc->vc_bell_duration)
1507 kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration);
1508 return;
1509 case 8:
1510 bs(vc);
1511 return;
1512 case 9:
1513 vc->vc_pos -= (vc->vc_x << 1);
1514 while (vc->vc_x < vc->vc_cols - 1) {
1515 vc->vc_x++;
1516 if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31)))
1517 break;
1518 }
1519 vc->vc_pos += (vc->vc_x << 1);
1520 return;
1521 case 10: case 11: case 12:
1522 lf(vc);
1523 if (!is_kbd(vc, lnm))
1524 return;
1525 case 13:
1526 cr(vc);
1527 return;
1528 case 14:
1529 vc->vc_charset = 1;
1530 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1531 vc->vc_disp_ctrl = 1;
1532 return;
1533 case 15:
1534 vc->vc_charset = 0;
1535 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1536 vc->vc_disp_ctrl = 0;
1537 return;
1538 case 24: case 26:
1539 vc->vc_state = ESnormal;
1540 return;
1541 case 27:
1542 vc->vc_state = ESesc;
1543 return;
1544 case 127:
1545 del(vc);
1546 return;
1547 case 128+27:
1548 vc->vc_state = ESsquare;
1549 return;
1550 }
1551 switch(vc->vc_state) {
1552 case ESesc:
1553 vc->vc_state = ESnormal;
1554 switch (c) {
1555 case '[':
1556 vc->vc_state = ESsquare;
1557 return;
1558 case ']':
1559 vc->vc_state = ESnonstd;
1560 return;
1561 case '%':
1562 vc->vc_state = ESpercent;
1563 return;
1564 case 'E':
1565 cr(vc);
1566 lf(vc);
1567 return;
1568 case 'M':
1569 ri(vc);
1570 return;
1571 case 'D':
1572 lf(vc);
1573 return;
1574 case 'H':
1575 vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31));
1576 return;
1577 case 'Z':
1578 respond_ID(tty);
1579 return;
1580 case '7':
1581 save_cur(vc);
1582 return;
1583 case '8':
1584 restore_cur(vc);
1585 return;
1586 case '(':
1587 vc->vc_state = ESsetG0;
1588 return;
1589 case ')':
1590 vc->vc_state = ESsetG1;
1591 return;
1592 case '#':
1593 vc->vc_state = EShash;
1594 return;
1595 case 'c':
1596 reset_terminal(vc, 1);
1597 return;
1598 case '>': /* Numeric keypad */
1599 clr_kbd(vc, kbdapplic);
1600 return;
1601 case '=': /* Appl. keypad */
1602 set_kbd(vc, kbdapplic);
1603 return;
1604 }
1605 return;
1606 case ESnonstd:
1607 if (c=='P') { /* palette escape sequence */
1608 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1609 vc->vc_par[vc->vc_npar] = 0;
1610 vc->vc_npar = 0;
1611 vc->vc_state = ESpalette;
1612 return;
1613 } else if (c=='R') { /* reset palette */
1614 reset_palette(vc);
1615 vc->vc_state = ESnormal;
1616 } else
1617 vc->vc_state = ESnormal;
1618 return;
1619 case ESpalette:
1620 if ( (c>='0'&&c<='9') || (c>='A'&&c<='F') || (c>='a'&&c<='f') ) {
1621 vc->vc_par[vc->vc_npar++] = (c > '9' ? (c & 0xDF) - 'A' + 10 : c - '0');
1622 if (vc->vc_npar == 7) {
1623 int i = vc->vc_par[0] * 3, j = 1;
1624 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1625 vc->vc_palette[i++] += vc->vc_par[j++];
1626 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1627 vc->vc_palette[i++] += vc->vc_par[j++];
1628 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1629 vc->vc_palette[i] += vc->vc_par[j];
1630 set_palette(vc);
1631 vc->vc_state = ESnormal;
1632 }
1633 } else
1634 vc->vc_state = ESnormal;
1635 return;
1636 case ESsquare:
1637 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1638 vc->vc_par[vc->vc_npar] = 0;
1639 vc->vc_npar = 0;
1640 vc->vc_state = ESgetpars;
1641 if (c == '[') { /* Function key */
1642 vc->vc_state=ESfunckey;
1643 return;
1644 }
1645 vc->vc_ques = (c == '?');
1646 if (vc->vc_ques)
1647 return;
1648 case ESgetpars:
1649 if (c == ';' && vc->vc_npar < NPAR - 1) {
1650 vc->vc_npar++;
1651 return;
1652 } else if (c>='0' && c<='9') {
1653 vc->vc_par[vc->vc_npar] *= 10;
1654 vc->vc_par[vc->vc_npar] += c - '0';
1655 return;
1656 } else
1657 vc->vc_state = ESgotpars;
1658 case ESgotpars:
1659 vc->vc_state = ESnormal;
1660 switch(c) {
1661 case 'h':
1662 set_mode(vc, 1);
1663 return;
1664 case 'l':
1665 set_mode(vc, 0);
1666 return;
1667 case 'c':
1668 if (vc->vc_ques) {
1669 if (vc->vc_par[0])
1670 vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16);
1671 else
1672 vc->vc_cursor_type = CUR_DEFAULT;
1673 return;
1674 }
1675 break;
1676 case 'm':
1677 if (vc->vc_ques) {
1678 clear_selection();
1679 if (vc->vc_par[0])
1680 vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1];
1681 else
1682 vc->vc_complement_mask = vc->vc_s_complement_mask;
1683 return;
1684 }
1685 break;
1686 case 'n':
1687 if (!vc->vc_ques) {
1688 if (vc->vc_par[0] == 5)
1689 status_report(tty);
1690 else if (vc->vc_par[0] == 6)
1691 cursor_report(vc, tty);
1692 }
1693 return;
1694 }
1695 if (vc->vc_ques) {
1696 vc->vc_ques = 0;
1697 return;
1698 }
1699 switch(c) {
1700 case 'G': case '`':
1701 if (vc->vc_par[0])
1702 vc->vc_par[0]--;
1703 gotoxy(vc, vc->vc_par[0], vc->vc_y);
1704 return;
1705 case 'A':
1706 if (!vc->vc_par[0])
1707 vc->vc_par[0]++;
1708 gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]);
1709 return;
1710 case 'B': case 'e':
1711 if (!vc->vc_par[0])
1712 vc->vc_par[0]++;
1713 gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]);
1714 return;
1715 case 'C': case 'a':
1716 if (!vc->vc_par[0])
1717 vc->vc_par[0]++;
1718 gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y);
1719 return;
1720 case 'D':
1721 if (!vc->vc_par[0])
1722 vc->vc_par[0]++;
1723 gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y);
1724 return;
1725 case 'E':
1726 if (!vc->vc_par[0])
1727 vc->vc_par[0]++;
1728 gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]);
1729 return;
1730 case 'F':
1731 if (!vc->vc_par[0])
1732 vc->vc_par[0]++;
1733 gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]);
1734 return;
1735 case 'd':
1736 if (vc->vc_par[0])
1737 vc->vc_par[0]--;
1738 gotoxay(vc, vc->vc_x ,vc->vc_par[0]);
1739 return;
1740 case 'H': case 'f':
1741 if (vc->vc_par[0])
1742 vc->vc_par[0]--;
1743 if (vc->vc_par[1])
1744 vc->vc_par[1]--;
1745 gotoxay(vc, vc->vc_par[1], vc->vc_par[0]);
1746 return;
1747 case 'J':
1748 csi_J(vc, vc->vc_par[0]);
1749 return;
1750 case 'K':
1751 csi_K(vc, vc->vc_par[0]);
1752 return;
1753 case 'L':
1754 csi_L(vc, vc->vc_par[0]);
1755 return;
1756 case 'M':
1757 csi_M(vc, vc->vc_par[0]);
1758 return;
1759 case 'P':
1760 csi_P(vc, vc->vc_par[0]);
1761 return;
1762 case 'c':
1763 if (!vc->vc_par[0])
1764 respond_ID(tty);
1765 return;
1766 case 'g':
1767 if (!vc->vc_par[0])
1768 vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31));
1769 else if (vc->vc_par[0] == 3) {
1770 vc->vc_tab_stop[0] =
1771 vc->vc_tab_stop[1] =
1772 vc->vc_tab_stop[2] =
1773 vc->vc_tab_stop[3] =
1774 vc->vc_tab_stop[4] = 0;
1775 }
1776 return;
1777 case 'm':
1778 csi_m(vc);
1779 return;
1780 case 'q': /* DECLL - but only 3 leds */
1781 /* map 0,1,2,3 to 0,1,2,4 */
1782 if (vc->vc_par[0] < 4)
1783 setledstate(kbd_table + vc->vc_num,
1784 (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4);
1785 return;
1786 case 'r':
1787 if (!vc->vc_par[0])
1788 vc->vc_par[0]++;
1789 if (!vc->vc_par[1])
1790 vc->vc_par[1] = vc->vc_rows;
1791 /* Minimum allowed region is 2 lines */
1792 if (vc->vc_par[0] < vc->vc_par[1] &&
1793 vc->vc_par[1] <= vc->vc_rows) {
1794 vc->vc_top = vc->vc_par[0] - 1;
1795 vc->vc_bottom = vc->vc_par[1];
1796 gotoxay(vc, 0, 0);
1797 }
1798 return;
1799 case 's':
1800 save_cur(vc);
1801 return;
1802 case 'u':
1803 restore_cur(vc);
1804 return;
1805 case 'X':
1806 csi_X(vc, vc->vc_par[0]);
1807 return;
1808 case '@':
1809 csi_at(vc, vc->vc_par[0]);
1810 return;
1811 case ']': /* setterm functions */
1812 setterm_command(vc);
1813 return;
1814 }
1815 return;
1816 case ESpercent:
1817 vc->vc_state = ESnormal;
1818 switch (c) {
1819 case '@': /* defined in ISO 2022 */
1820 vc->vc_utf = 0;
1821 return;
1822 case 'G': /* prelim official escape code */
1823 case '8': /* retained for compatibility */
1824 vc->vc_utf = 1;
1825 return;
1826 }
1827 return;
1828 case ESfunckey:
1829 vc->vc_state = ESnormal;
1830 return;
1831 case EShash:
1832 vc->vc_state = ESnormal;
1833 if (c == '8') {
1834 /* DEC screen alignment test. kludge :-) */
1835 vc->vc_video_erase_char =
1836 (vc->vc_video_erase_char & 0xff00) | 'E';
1837 csi_J(vc, 2);
1838 vc->vc_video_erase_char =
1839 (vc->vc_video_erase_char & 0xff00) | ' ';
1840 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
1841 }
1842 return;
1843 case ESsetG0:
1844 if (c == '0')
1845 vc->vc_G0_charset = GRAF_MAP;
1846 else if (c == 'B')
1847 vc->vc_G0_charset = LAT1_MAP;
1848 else if (c == 'U')
1849 vc->vc_G0_charset = IBMPC_MAP;
1850 else if (c == 'K')
1851 vc->vc_G0_charset = USER_MAP;
1852 if (vc->vc_charset == 0)
1853 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1854 vc->vc_state = ESnormal;
1855 return;
1856 case ESsetG1:
1857 if (c == '0')
1858 vc->vc_G1_charset = GRAF_MAP;
1859 else if (c == 'B')
1860 vc->vc_G1_charset = LAT1_MAP;
1861 else if (c == 'U')
1862 vc->vc_G1_charset = IBMPC_MAP;
1863 else if (c == 'K')
1864 vc->vc_G1_charset = USER_MAP;
1865 if (vc->vc_charset == 1)
1866 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1867 vc->vc_state = ESnormal;
1868 return;
1869 default:
1870 vc->vc_state = ESnormal;
1871 }
1872}
1873
1874/* This is a temporary buffer used to prepare a tty console write
1875 * so that we can easily avoid touching user space while holding the
1876 * console spinlock. It is allocated in con_init and is shared by
1877 * this code and the vc_screen read/write tty calls.
1878 *
1879 * We have to allocate this statically in the kernel data section
1880 * since console_init (and thus con_init) are called before any
1881 * kernel memory allocation is available.
1882 */
1883char con_buf[CON_BUF_SIZE];
1884DECLARE_MUTEX(con_buf_sem);
1885
1886/* acquires console_sem */
1887static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count)
1888{
1889#ifdef VT_BUF_VRAM_ONLY
1890#define FLUSH do { } while(0);
1891#else
1892#define FLUSH if (draw_x >= 0) { \
1893 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
1894 draw_x = -1; \
1895 }
1896#endif
1897
1898 int c, tc, ok, n = 0, draw_x = -1;
1899 unsigned int currcons;
1900 unsigned long draw_from = 0, draw_to = 0;
1901 struct vc_data *vc;
1902 u16 himask, charmask;
1903 const unsigned char *orig_buf = NULL;
1904 int orig_count;
1905
1906 if (in_interrupt())
1907 return count;
1908
1909 might_sleep();
1910
1911 acquire_console_sem();
1912 vc = tty->driver_data;
1913 if (vc == NULL) {
1914 printk(KERN_ERR "vt: argh, driver_data is NULL !\n");
1915 release_console_sem();
1916 return 0;
1917 }
1918
1919 currcons = vc->vc_num;
1920 if (!vc_cons_allocated(currcons)) {
1921 /* could this happen? */
1922 static int error = 0;
1923 if (!error) {
1924 error = 1;
1925 printk("con_write: tty %d not allocated\n", currcons+1);
1926 }
1927 release_console_sem();
1928 return 0;
1929 }
1930 release_console_sem();
1931
1932 orig_buf = buf;
1933 orig_count = count;
1934
1935 /* At this point 'buf' is guaranteed to be a kernel buffer
1936 * and therefore no access to userspace (and therefore sleeping)
1937 * will be needed. The con_buf_sem serializes all tty based
1938 * console rendering and vcs write/read operations. We hold
1939 * the console spinlock during the entire write.
1940 */
1941
1942 acquire_console_sem();
1943
1944 vc = tty->driver_data;
1945 if (vc == NULL) {
1946 printk(KERN_ERR "vt: argh, driver_data _became_ NULL !\n");
1947 release_console_sem();
1948 goto out;
1949 }
1950
1951 himask = vc->vc_hi_font_mask;
1952 charmask = himask ? 0x1ff : 0xff;
1953
1954 /* undraw cursor first */
1955 if (IS_FG(vc))
1956 hide_cursor(vc);
1957
1958 while (!tty->stopped && count) {
1959 int orig = *buf;
1960 c = orig;
1961 buf++;
1962 n++;
1963 count--;
1964
1965 /* Do no translation at all in control states */
1966 if (vc->vc_state != ESnormal) {
1967 tc = c;
1968 } else if (vc->vc_utf) {
1969 /* Combine UTF-8 into Unicode */
1970 /* Incomplete characters silently ignored */
1971 if(c > 0x7f) {
1972 if (vc->vc_utf_count > 0 && (c & 0xc0) == 0x80) {
1973 vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f);
1974 vc->vc_utf_count--;
1975 if (vc->vc_utf_count == 0)
1976 tc = c = vc->vc_utf_char;
1977 else continue;
1978 } else {
1979 if ((c & 0xe0) == 0xc0) {
1980 vc->vc_utf_count = 1;
1981 vc->vc_utf_char = (c & 0x1f);
1982 } else if ((c & 0xf0) == 0xe0) {
1983 vc->vc_utf_count = 2;
1984 vc->vc_utf_char = (c & 0x0f);
1985 } else if ((c & 0xf8) == 0xf0) {
1986 vc->vc_utf_count = 3;
1987 vc->vc_utf_char = (c & 0x07);
1988 } else if ((c & 0xfc) == 0xf8) {
1989 vc->vc_utf_count = 4;
1990 vc->vc_utf_char = (c & 0x03);
1991 } else if ((c & 0xfe) == 0xfc) {
1992 vc->vc_utf_count = 5;
1993 vc->vc_utf_char = (c & 0x01);
1994 } else
1995 vc->vc_utf_count = 0;
1996 continue;
1997 }
1998 } else {
1999 tc = c;
2000 vc->vc_utf_count = 0;
2001 }
2002 } else { /* no utf */
2003 tc = vc->vc_translate[vc->vc_toggle_meta ? (c | 0x80) : c];
2004 }
2005
2006 /* If the original code was a control character we
2007 * only allow a glyph to be displayed if the code is
2008 * not normally used (such as for cursor movement) or
2009 * if the disp_ctrl mode has been explicitly enabled.
2010 * Certain characters (as given by the CTRL_ALWAYS
2011 * bitmap) are always displayed as control characters,
2012 * as the console would be pretty useless without
2013 * them; to display an arbitrary font position use the
2014 * direct-to-font zone in UTF-8 mode.
2015 */
2016 ok = tc && (c >= 32 ||
2017 (!vc->vc_utf && !(((vc->vc_disp_ctrl ? CTRL_ALWAYS
2018 : CTRL_ACTION) >> c) & 1)))
2019 && (c != 127 || vc->vc_disp_ctrl)
2020 && (c != 128+27);
2021
2022 if (vc->vc_state == ESnormal && ok) {
2023 /* Now try to find out how to display it */
2024 tc = conv_uni_to_pc(vc, tc);
2025 if ( tc == -4 ) {
2026 /* If we got -4 (not found) then see if we have
2027 defined a replacement character (U+FFFD) */
2028 tc = conv_uni_to_pc(vc, 0xfffd);
2029
2030 /* One reason for the -4 can be that we just
2031 did a clear_unimap();
2032 try at least to show something. */
2033 if (tc == -4)
2034 tc = c;
2035 } else if ( tc == -3 ) {
2036 /* Bad hash table -- hope for the best */
2037 tc = c;
2038 }
2039 if (tc & ~charmask)
2040 continue; /* Conversion failed */
2041
2042 if (vc->vc_need_wrap || vc->vc_decim)
2043 FLUSH
2044 if (vc->vc_need_wrap) {
2045 cr(vc);
2046 lf(vc);
2047 }
2048 if (vc->vc_decim)
2049 insert_char(vc, 1);
2050 scr_writew(himask ?
2051 ((vc->vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) :
2052 (vc->vc_attr << 8) + tc,
2053 (u16 *) vc->vc_pos);
2054 if (DO_UPDATE(vc) && draw_x < 0) {
2055 draw_x = vc->vc_x;
2056 draw_from = vc->vc_pos;
2057 }
2058 if (vc->vc_x == vc->vc_cols - 1) {
2059 vc->vc_need_wrap = vc->vc_decawm;
2060 draw_to = vc->vc_pos + 2;
2061 } else {
2062 vc->vc_x++;
2063 draw_to = (vc->vc_pos += 2);
2064 }
2065 continue;
2066 }
2067 FLUSH
2068 do_con_trol(tty, vc, orig);
2069 }
2070 FLUSH
2071 console_conditional_schedule();
2072 release_console_sem();
2073
2074out:
2075 return n;
2076#undef FLUSH
2077}
2078
2079/*
2080 * This is the console switching callback.
2081 *
2082 * Doing console switching in a process context allows
2083 * us to do the switches asynchronously (needed when we want
2084 * to switch due to a keyboard interrupt). Synchronization
2085 * with other console code and prevention of re-entrancy is
2086 * ensured with console_sem.
2087 */
2088static void console_callback(void *ignored)
2089{
2090 acquire_console_sem();
2091
2092 if (want_console >= 0) {
2093 if (want_console != fg_console &&
2094 vc_cons_allocated(want_console)) {
2095 hide_cursor(vc_cons[fg_console].d);
2096 change_console(vc_cons[want_console].d);
2097 /* we only changed when the console had already
2098 been allocated - a new console is not created
2099 in an interrupt routine */
2100 }
2101 want_console = -1;
2102 }
2103 if (do_poke_blanked_console) { /* do not unblank for a LED change */
2104 do_poke_blanked_console = 0;
2105 poke_blanked_console();
2106 }
2107 if (scrollback_delta) {
2108 struct vc_data *vc = vc_cons[fg_console].d;
2109 clear_selection();
2110 if (vc->vc_mode == KD_TEXT)
2111 vc->vc_sw->con_scrolldelta(vc, scrollback_delta);
2112 scrollback_delta = 0;
2113 }
2114 if (blank_timer_expired) {
2115 do_blank_screen(0);
2116 blank_timer_expired = 0;
2117 }
2118
2119 release_console_sem();
2120}
2121
2122void set_console(int nr)
2123{
2124 want_console = nr;
2125 schedule_console_callback();
2126}
2127
2128struct tty_driver *console_driver;
2129
2130#ifdef CONFIG_VT_CONSOLE
2131
2132/*
2133 * Console on virtual terminal
2134 *
2135 * The console must be locked when we get here.
2136 */
2137
2138static void vt_console_print(struct console *co, const char *b, unsigned count)
2139{
2140 struct vc_data *vc = vc_cons[fg_console].d;
2141 unsigned char c;
2142 static unsigned long printing;
2143 const ushort *start;
2144 ushort cnt = 0;
2145 ushort myx;
2146
2147 /* console busy or not yet initialized */
2148 if (!printable || test_and_set_bit(0, &printing))
2149 return;
2150
2151 if (kmsg_redirect && vc_cons_allocated(kmsg_redirect - 1))
2152 vc = vc_cons[kmsg_redirect - 1].d;
2153
2154 /* read `x' only after setting currcons properly (otherwise
2155 the `x' macro will read the x of the foreground console). */
2156 myx = vc->vc_x;
2157
2158 if (!vc_cons_allocated(fg_console)) {
2159 /* impossible */
2160 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2161 goto quit;
2162 }
2163
2164 if (vc->vc_mode != KD_TEXT)
2165 goto quit;
2166
2167 /* undraw cursor first */
2168 if (IS_FG(vc))
2169 hide_cursor(vc);
2170
2171 start = (ushort *)vc->vc_pos;
2172
2173 /* Contrived structure to try to emulate original need_wrap behaviour
2174 * Problems caused when we have need_wrap set on '\n' character */
2175 while (count--) {
2176 c = *b++;
2177 if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) {
2178 if (cnt > 0) {
2179 if (CON_IS_VISIBLE(vc))
2180 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2181 vc->vc_x += cnt;
2182 if (vc->vc_need_wrap)
2183 vc->vc_x--;
2184 cnt = 0;
2185 }
2186 if (c == 8) { /* backspace */
2187 bs(vc);
2188 start = (ushort *)vc->vc_pos;
2189 myx = vc->vc_x;
2190 continue;
2191 }
2192 if (c != 13)
2193 lf(vc);
2194 cr(vc);
2195 start = (ushort *)vc->vc_pos;
2196 myx = vc->vc_x;
2197 if (c == 10 || c == 13)
2198 continue;
2199 }
2200 scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos);
2201 cnt++;
2202 if (myx == vc->vc_cols - 1) {
2203 vc->vc_need_wrap = 1;
2204 continue;
2205 }
2206 vc->vc_pos += 2;
2207 myx++;
2208 }
2209 if (cnt > 0) {
2210 if (CON_IS_VISIBLE(vc))
2211 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2212 vc->vc_x += cnt;
2213 if (vc->vc_x == vc->vc_cols) {
2214 vc->vc_x--;
2215 vc->vc_need_wrap = 1;
2216 }
2217 }
2218 set_cursor(vc);
2219
2220quit:
2221 clear_bit(0, &printing);
2222}
2223
2224static struct tty_driver *vt_console_device(struct console *c, int *index)
2225{
2226 *index = c->index ? c->index-1 : fg_console;
2227 return console_driver;
2228}
2229
2230static struct console vt_console_driver = {
2231 .name = "tty",
2232 .write = vt_console_print,
2233 .device = vt_console_device,
2234 .unblank = unblank_screen,
2235 .flags = CON_PRINTBUFFER,
2236 .index = -1,
2237};
2238#endif
2239
2240/*
2241 * Handling of Linux-specific VC ioctls
2242 */
2243
2244/*
2245 * Generally a bit racy with respect to console_sem().
2246 *
2247 * There are some functions which don't need it.
2248 *
2249 * There are some functions which can sleep for arbitrary periods
2250 * (paste_selection) but we don't need the lock there anyway.
2251 *
2252 * set_selection has locking, and definitely needs it
2253 */
2254
2255int tioclinux(struct tty_struct *tty, unsigned long arg)
2256{
2257 char type, data;
2258 char __user *p = (char __user *)arg;
2259 int lines;
2260 int ret;
2261
2262 if (tty->driver->type != TTY_DRIVER_TYPE_CONSOLE)
2263 return -EINVAL;
2264 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN))
2265 return -EPERM;
2266 if (get_user(type, p))
2267 return -EFAULT;
2268 ret = 0;
2269 switch (type)
2270 {
2271 case TIOCL_SETSEL:
2272 acquire_console_sem();
2273 ret = set_selection((struct tiocl_selection __user *)(p+1), tty);
2274 release_console_sem();
2275 break;
2276 case TIOCL_PASTESEL:
2277 ret = paste_selection(tty);
2278 break;
2279 case TIOCL_UNBLANKSCREEN:
2d237c63 2280 acquire_console_sem();
1da177e4 2281 unblank_screen();
2d237c63 2282 release_console_sem();
1da177e4
LT		 2283 break;
2284 case TIOCL_SELLOADLUT:
2285 ret = sel_loadlut(p);
2286 break;
2287 case TIOCL_GETSHIFTSTATE:
2288
2289 /*
2290 * Make it possible to react to Shift+Mousebutton.
2291 * Note that 'shift_state' is an undocumented
2292 * kernel-internal variable; programs not closely
2293 * related to the kernel should not use this.
2294 */
2295 data = shift_state;
2296 ret = __put_user(data, p);
2297 break;
2298 case TIOCL_GETMOUSEREPORTING:
2299 data = mouse_reporting();
2300 ret = __put_user(data, p);
2301 break;
2302 case TIOCL_SETVESABLANK:
2303 set_vesa_blanking(p);
2304 break;
2305 case TIOCL_SETKMSGREDIRECT:
2306 if (!capable(CAP_SYS_ADMIN)) {
2307 ret = -EPERM;
2308 } else {
2309 if (get_user(data, p+1))
2310 ret = -EFAULT;
2311 else
2312 kmsg_redirect = data;
2313 }
2314 break;
2315 case TIOCL_GETFGCONSOLE:
2316 ret = fg_console;
2317 break;
2318 case TIOCL_SCROLLCONSOLE:
2319 if (get_user(lines, (s32 __user *)(p+4))) {
2320 ret = -EFAULT;
2321 } else {
2322 scrollfront(vc_cons[fg_console].d, lines);
2323 ret = 0;
2324 }
2325 break;
2326 case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
2d237c63 2327 acquire_console_sem();
1da177e4
LT		 2328 ignore_poke = 1;
2329 do_blank_screen(0);
2d237c63 2330 release_console_sem();
1da177e4
LT		 2331 break;
2332 case TIOCL_BLANKEDSCREEN:
2333 ret = console_blanked;
2334 break;
2335 default:
2336 ret = -EINVAL;
2337 break;
2338 }
2339 return ret;
2340}
2341
2342/*
2343 * /dev/ttyN handling
2344 */
2345
2346static int con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2347{
2348 int retval;
2349
2350 retval = do_con_write(tty, buf, count);
2351 con_flush_chars(tty);
2352
2353 return retval;
2354}
2355
2356static void con_put_char(struct tty_struct *tty, unsigned char ch)
2357{
2358 if (in_interrupt())
2359 return; /* n_r3964 calls put_char() from interrupt context */
2360 do_con_write(tty, &ch, 1);
2361}
2362
2363static int con_write_room(struct tty_struct *tty)
2364{
2365 if (tty->stopped)
2366 return 0;
2367 return 4096; /* No limit, really; we're not buffering */
2368}
2369
2370static int con_chars_in_buffer(struct tty_struct *tty)
2371{
2372 return 0; /* we're not buffering */
2373}
2374
2375/*
2376 * con_throttle and con_unthrottle are only used for
2377 * paste_selection(), which has to stuff in a large number of
2378 * characters...
2379 */
2380static void con_throttle(struct tty_struct *tty)
2381{
2382}
2383
2384static void con_unthrottle(struct tty_struct *tty)
2385{
2386 struct vc_data *vc = tty->driver_data;
2387
2388 wake_up_interruptible(&vc->paste_wait);
2389}
2390
2391/*
2392 * Turn the Scroll-Lock LED on when the tty is stopped
2393 */
2394static void con_stop(struct tty_struct *tty)
2395{
2396 int console_num;
2397 if (!tty)
2398 return;
2399 console_num = tty->index;
2400 if (!vc_cons_allocated(console_num))
2401 return;
2402 set_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2403 set_leds();
2404}
2405
2406/*
2407 * Turn the Scroll-Lock LED off when the console is started
2408 */
2409static void con_start(struct tty_struct *tty)
2410{
2411 int console_num;
2412 if (!tty)
2413 return;
2414 console_num = tty->index;
2415 if (!vc_cons_allocated(console_num))
2416 return;
2417 clr_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2418 set_leds();
2419}
2420
2421static void con_flush_chars(struct tty_struct *tty)
2422{
2423 struct vc_data *vc;
2424
2425 if (in_interrupt()) /* from flush_to_ldisc */
2426 return;
2427
2428 /* if we race with con_close(), vt may be null */
2429 acquire_console_sem();
2430 vc = tty->driver_data;
2431 if (vc)
2432 set_cursor(vc);
2433 release_console_sem();
2434}
2435
2436/*
2437 * Allocate the console screen memory.
2438 */
2439static int con_open(struct tty_struct *tty, struct file *filp)
2440{
2441 unsigned int currcons = tty->index;
2442 int ret = 0;
2443
2444 acquire_console_sem();
f786648b 2445 if (tty->driver_data == NULL) {
1da177e4
LT		 2446 ret = vc_allocate(currcons);
2447 if (ret == 0) {
2448 struct vc_data *vc = vc_cons[currcons].d;
2449 tty->driver_data = vc;
2450 vc->vc_tty = tty;
2451
2452 if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
2453 tty->winsize.ws_row = vc_cons[currcons].d->vc_rows;
2454 tty->winsize.ws_col = vc_cons[currcons].d->vc_cols;
2455 }
2456 release_console_sem();
2457 vcs_make_devfs(tty);
2458 return ret;
2459 }
2460 }
2461 release_console_sem();
2462 return ret;
2463}
2464
2465/*
2466 * We take tty_sem in here to prevent another thread from coming in via init_dev
2467 * and taking a ref against the tty while we're in the process of forgetting
2468 * about it and cleaning things up.
2469 *
2470 * This is because vcs_remove_devfs() can sleep and will drop the BKL.
2471 */
2472static void con_close(struct tty_struct *tty, struct file *filp)
2473{
2474 down(&tty_sem);
2475 acquire_console_sem();
2476 if (tty && tty->count == 1) {
2477 struct vc_data *vc = tty->driver_data;
2478
2479 if (vc)
2480 vc->vc_tty = NULL;
2481 tty->driver_data = NULL;
2482 release_console_sem();
2483 vcs_remove_devfs(tty);
2484 up(&tty_sem);
2485 /*
2486 * tty_sem is released, but we still hold BKL, so there is
2487 * still exclusion against init_dev()
2488 */
2489 return;
2490 }
2491 release_console_sem();
2492 up(&tty_sem);
2493}
2494
2495static void vc_init(struct vc_data *vc, unsigned int rows,
2496 unsigned int cols, int do_clear)
2497{
2498 int j, k ;
2499
2500 vc->vc_cols = cols;
2501 vc->vc_rows = rows;
2502 vc->vc_size_row = cols << 1;
2503 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
2504
2505 set_origin(vc);
2506 vc->vc_pos = vc->vc_origin;
2507 reset_vc(vc);
2508 for (j=k=0; j<16; j++) {
2509 vc->vc_palette[k++] = default_red[j] ;
2510 vc->vc_palette[k++] = default_grn[j] ;
2511 vc->vc_palette[k++] = default_blu[j] ;
2512 }
2513 vc->vc_def_color = 0x07; /* white */
2514 vc->vc_ulcolor = 0x0f; /* bold white */
2515 vc->vc_halfcolor = 0x08; /* grey */
2516 init_waitqueue_head(&vc->paste_wait);
2517 reset_terminal(vc, do_clear);
2518}
2519
2520/*
2521 * This routine initializes console interrupts, and does nothing
2522 * else. If you want the screen to clear, call tty_write with
2523 * the appropriate escape-sequence.
2524 */
2525
2526static int __init con_init(void)
2527{
2528 const char *display_desc = NULL;
2529 struct vc_data *vc;
2530 unsigned int currcons = 0;
2531
2532 acquire_console_sem();
2533
2534 if (conswitchp)
2535 display_desc = conswitchp->con_startup();
2536 if (!display_desc) {
2537 fg_console = 0;
2538 release_console_sem();
2539 return 0;
2540 }
2541
2542 init_timer(&console_timer);
2543 console_timer.function = blank_screen_t;
2544 if (blankinterval) {
2545 blank_state = blank_normal_wait;
2546 mod_timer(&console_timer, jiffies + blankinterval);
2547 }
2548
2549 /*
2550 * kmalloc is not running yet - we use the bootmem allocator.
2551 */
2552 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) {
2553 vc_cons[currcons].d = vc = alloc_bootmem(sizeof(struct vc_data));
2554 visual_init(vc, currcons, 1);
2555 vc->vc_screenbuf = (unsigned short *)alloc_bootmem(vc->vc_screenbuf_size);
2556 vc->vc_kmalloced = 0;
2557 vc_init(vc, vc->vc_rows, vc->vc_cols,
2558 currcons || !vc->vc_sw->con_save_screen);
2559 }
2560 currcons = fg_console = 0;
2561 master_display_fg = vc = vc_cons[currcons].d;
2562 set_origin(vc);
2563 save_screen(vc);
2564 gotoxy(vc, vc->vc_x, vc->vc_y);
2565 csi_J(vc, 0);
2566 update_screen(vc);
2567 printk("Console: %s %s %dx%d",
2568 vc->vc_can_do_color ? "colour" : "mono",
2569 display_desc, vc->vc_cols, vc->vc_rows);
2570 printable = 1;
2571 printk("\n");
2572
2573 release_console_sem();
2574
2575#ifdef CONFIG_VT_CONSOLE
2576 register_console(&vt_console_driver);
2577#endif
2578 return 0;
2579}
2580console_initcall(con_init);
2581
2582static struct tty_operations con_ops = {
2583 .open = con_open,
2584 .close = con_close,
2585 .write = con_write,
2586 .write_room = con_write_room,
2587 .put_char = con_put_char,
2588 .flush_chars = con_flush_chars,
2589 .chars_in_buffer = con_chars_in_buffer,
2590 .ioctl = vt_ioctl,
2591 .stop = con_stop,
2592 .start = con_start,
2593 .throttle = con_throttle,
2594 .unthrottle = con_unthrottle,
2595};
2596
2597int __init vty_init(void)
2598{
2599 vcs_init();
2600
2601 console_driver = alloc_tty_driver(MAX_NR_CONSOLES);
2602 if (!console_driver)
2603 panic("Couldn't allocate console driver\n");
2604 console_driver->owner = THIS_MODULE;
2605 console_driver->devfs_name = "vc/";
2606 console_driver->name = "tty";
2607 console_driver->name_base = 1;
2608 console_driver->major = TTY_MAJOR;
2609 console_driver->minor_start = 1;
2610 console_driver->type = TTY_DRIVER_TYPE_CONSOLE;
2611 console_driver->init_termios = tty_std_termios;
2612 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS;
2613 tty_set_operations(console_driver, &con_ops);
2614 if (tty_register_driver(console_driver))
2615 panic("Couldn't register console driver\n");
2616
2617 kbd_init();
2618 console_map_init();
2619#ifdef CONFIG_PROM_CONSOLE
2620 prom_con_init();
2621#endif
2622#ifdef CONFIG_MDA_CONSOLE
2623 mda_console_init();
2624#endif
2625 return 0;
2626}
2627
2628#ifndef VT_SINGLE_DRIVER
2629
2630/*
2631 * If we support more console drivers, this function is used
2632 * when a driver wants to take over some existing consoles
2633 * and become default driver for newly opened ones.
2634 */
2635
2636int take_over_console(const struct consw *csw, int first, int last, int deflt)
2637{
2638 int i, j = -1;
2639 const char *desc;
2640 struct module *owner;
2641
2642 owner = csw->owner;
2643 if (!try_module_get(owner))
2644 return -ENODEV;
2645
2646 acquire_console_sem();
2647
2648 desc = csw->con_startup();
2649 if (!desc) {
2650 release_console_sem();
2651 module_put(owner);
2652 return -ENODEV;
2653 }
2654 if (deflt) {
2655 if (conswitchp)
2656 module_put(conswitchp->owner);
2657 __module_get(owner);
2658 conswitchp = csw;
2659 }
2660
2661 for (i = first; i <= last; i++) {
2662 int old_was_color;
2663 struct vc_data *vc = vc_cons[i].d;
2664
2665 if (con_driver_map[i])
2666 module_put(con_driver_map[i]->owner);
2667 __module_get(owner);
2668 con_driver_map[i] = csw;
2669
2670 if (!vc || !vc->vc_sw)
2671 continue;
2672
2673 j = i;
2674 if (CON_IS_VISIBLE(vc))
2675 save_screen(vc);
2676 old_was_color = vc->vc_can_do_color;
2677 vc->vc_sw->con_deinit(vc);
2678 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
2679 vc->vc_visible_origin = vc->vc_origin;
2680 vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size;
2681 vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x;
2682 visual_init(vc, i, 0);
2683 update_attr(vc);
2684
2685 /* If the console changed between mono <-> color, then
2686 * the attributes in the screenbuf will be wrong. The
2687 * following resets all attributes to something sane.
2688 */
2689 if (old_was_color != vc->vc_can_do_color)
2690 clear_buffer_attributes(vc);
2691
2692 if (CON_IS_VISIBLE(vc))
2693 update_screen(vc);
2694 }
2695 printk("Console: switching ");
2696 if (!deflt)
2697 printk("consoles %d-%d ", first+1, last+1);
2698 if (j >= 0)
2699 printk("to %s %s %dx%d\n",
2700 vc_cons[j].d->vc_can_do_color ? "colour" : "mono",
2701 desc, vc_cons[j].d->vc_cols, vc_cons[j].d->vc_rows);
2702 else
2703 printk("to %s\n", desc);
2704
2705 release_console_sem();
2706
2707 module_put(owner);
2708 return 0;
2709}
2710
2711void give_up_console(const struct consw *csw)
2712{
2713 int i;
2714
2715 for(i = 0; i < MAX_NR_CONSOLES; i++)
2716 if (con_driver_map[i] == csw) {
2717 module_put(csw->owner);
2718 con_driver_map[i] = NULL;
2719 }
2720}
2721
2722#endif
2723
2724/*
2725 * Screen blanking
2726 */
2727
2728static void set_vesa_blanking(char __user *p)
2729{
2730 unsigned int mode;
2731 get_user(mode, p + 1);
2732 vesa_blank_mode = (mode < 4) ? mode : 0;
2733}
2734
2735/*
2736 * This is called by a timer handler
2737 */
2738static void vesa_powerdown(void)
2739{
2740 struct vc_data *c = vc_cons[fg_console].d;
2741 /*
2742 * Power down if currently suspended (1 or 2),
2743 * suspend if currently blanked (0),
2744 * else do nothing (i.e. already powered down (3)).
2745 * Called only if powerdown features are allowed.
2746 */
2747 switch (vesa_blank_mode) {
2748 case VESA_NO_BLANKING:
2749 c->vc_sw->con_blank(c, VESA_VSYNC_SUSPEND+1, 0);
2750 break;
2751 case VESA_VSYNC_SUSPEND:
2752 case VESA_HSYNC_SUSPEND:
2753 c->vc_sw->con_blank(c, VESA_POWERDOWN+1, 0);
2754 break;
2755 }
2756}
2757
2758void do_blank_screen(int entering_gfx)
2759{
2760 struct vc_data *vc = vc_cons[fg_console].d;
2761 int i;
2762
2763 WARN_CONSOLE_UNLOCKED();
2764
2765 if (console_blanked) {
2766 if (blank_state == blank_vesa_wait) {
2767 blank_state = blank_off;
2768 vesa_powerdown();
2769
2770 }
2771 return;
2772 }
2773 if (blank_state != blank_normal_wait)
2774 return;
2775 blank_state = blank_off;
2776
2777 /* entering graphics mode? */
2778 if (entering_gfx) {
2779 hide_cursor(vc);
2780 save_screen(vc);
2781 vc->vc_sw->con_blank(vc, -1, 1);
2782 console_blanked = fg_console + 1;
2783 set_origin(vc);
2784 return;
2785 }
2786
2787 /* don't blank graphics */
2788 if (vc->vc_mode != KD_TEXT) {
2789 console_blanked = fg_console + 1;
2790 return;
2791 }
2792
2793 hide_cursor(vc);
2794 del_timer_sync(&console_timer);
2795 blank_timer_expired = 0;
2796
2797 save_screen(vc);
2798 /* In case we need to reset origin, blanking hook returns 1 */
2799 i = vc->vc_sw->con_blank(vc, 1, 0);
2800 console_blanked = fg_console + 1;
2801 if (i)
2802 set_origin(vc);
2803
2804 if (console_blank_hook && console_blank_hook(1))
2805 return;
2806
2807 if (vesa_off_interval) {
030babac 2808 blank_state = blank_vesa_wait;
1da177e4
LT		 2809 mod_timer(&console_timer, jiffies + vesa_off_interval);
2810 }
2811
2812 if (vesa_blank_mode)
2813 vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0);
2814}
2815EXPORT_SYMBOL(do_blank_screen);
2816
2817/*
2818 * Called by timer as well as from vt_console_driver
2819 */
2820void do_unblank_screen(int leaving_gfx)
2821{
2822 struct vc_data *vc;
2823
2824 /* This should now always be called from a "sane" (read: can schedule)
2825 * context for the sake of the low level drivers, except in the special
2826 * case of oops_in_progress
2827 */
2828 if (!oops_in_progress)
2829 might_sleep();
2830
2831 WARN_CONSOLE_UNLOCKED();
2832
2833 ignore_poke = 0;
2834 if (!console_blanked)
2835 return;
2836 if (!vc_cons_allocated(fg_console)) {
2837 /* impossible */
2838 printk("unblank_screen: tty %d not allocated ??\n", fg_console+1);
2839 return;
2840 }
2841 vc = vc_cons[fg_console].d;
2842 if (vc->vc_mode != KD_TEXT)
2843 return; /* but leave console_blanked != 0 */
2844
2845 if (blankinterval) {
2846 mod_timer(&console_timer, jiffies + blankinterval);
2847 blank_state = blank_normal_wait;
2848 }
2849
2850 console_blanked = 0;
2851 if (vc->vc_sw->con_blank(vc, 0, leaving_gfx))
2852 /* Low-level driver cannot restore -> do it ourselves */
2853 update_screen(vc);
2854 if (console_blank_hook)
2855 console_blank_hook(0);
2856 set_palette(vc);
2857 set_cursor(vc);
2858}
2859EXPORT_SYMBOL(do_unblank_screen);
2860
2861/*
2862 * This is called by the outside world to cause a forced unblank, mostly for
2863 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
2864 * call it with 1 as an argument and so force a mode restore... that may kill
2865 * X or at least garbage the screen but would also make the Oops visible...
2866 */
2867void unblank_screen(void)
2868{
2869 do_unblank_screen(0);
2870}
2871
2872/*
2873 * We defer the timer blanking to work queue so it can take the console semaphore
2874 * (console operations can still happen at irq time, but only from printk which
2875 * has the console semaphore. Not perfect yet, but better than no locking
2876 */
2877static void blank_screen_t(unsigned long dummy)
2878{
cc63b1e1
JB		 2879 if (unlikely(!keventd_up())) {
2880 mod_timer(&console_timer, jiffies + blankinterval);
2881 return;
2882 }
1da177e4
LT		 2883 blank_timer_expired = 1;
2884 schedule_work(&console_work);
2885}
2886
2887void poke_blanked_console(void)
2888{
2889 WARN_CONSOLE_UNLOCKED();
2890
2891 /* Add this so we quickly catch whoever might call us in a non
2892 * safe context. Nowadays, unblank_screen() isn't to be called in
2893 * atomic contexts and is allowed to schedule (with the special case
2894 * of oops_in_progress, but that isn't of any concern for this
2895 * function. --BenH.
2896 */
2897 might_sleep();
2898
2899 /* This isn't perfectly race free, but a race here would be mostly harmless,
2900 * at worse, we'll do a spurrious blank and it's unlikely
2901 */
2902 del_timer(&console_timer);
2903 blank_timer_expired = 0;
2904
2905 if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS)
2906 return;
2907 if (console_blanked)
2908 unblank_screen();
2909 else if (blankinterval) {
2910 mod_timer(&console_timer, jiffies + blankinterval);
2911 blank_state = blank_normal_wait;
2912 }
2913}
2914
2915/*
2916 * Palettes
2917 */
2918
2919static void set_palette(struct vc_data *vc)
2920{
2921 WARN_CONSOLE_UNLOCKED();
2922
2923 if (vc->vc_mode != KD_GRAPHICS)
2924 vc->vc_sw->con_set_palette(vc, color_table);
2925}
2926
2927static int set_get_cmap(unsigned char __user *arg, int set)
2928{
2929 int i, j, k;
2930
2931 WARN_CONSOLE_UNLOCKED();
2932
2933 for (i = 0; i < 16; i++)
2934 if (set) {
2935 get_user(default_red[i], arg++);
2936 get_user(default_grn[i], arg++);
2937 get_user(default_blu[i], arg++);
2938 } else {
2939 put_user(default_red[i], arg++);
2940 put_user(default_grn[i], arg++);
2941 put_user(default_blu[i], arg++);
2942 }
2943 if (set) {
2944 for (i = 0; i < MAX_NR_CONSOLES; i++)
2945 if (vc_cons_allocated(i)) {
2946 for (j = k = 0; j < 16; j++) {
2947 vc_cons[i].d->vc_palette[k++] = default_red[j];
2948 vc_cons[i].d->vc_palette[k++] = default_grn[j];
2949 vc_cons[i].d->vc_palette[k++] = default_blu[j];
2950 }
2951 set_palette(vc_cons[i].d);
2952 }
2953 }
2954 return 0;
2955}
2956
2957/*
2958 * Load palette into the DAC registers. arg points to a colour
2959 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
2960 */
2961
2962int con_set_cmap(unsigned char __user *arg)
2963{
2964 int rc;
2965
2966 acquire_console_sem();
2967 rc = set_get_cmap (arg,1);
2968 release_console_sem();
2969
2970 return rc;
2971}
2972
2973int con_get_cmap(unsigned char __user *arg)
2974{
2975 int rc;
2976
2977 acquire_console_sem();
2978 rc = set_get_cmap (arg,0);
2979 release_console_sem();
2980
2981 return rc;
2982}
2983
2984void reset_palette(struct vc_data *vc)
2985{
2986 int j, k;
2987 for (j=k=0; j<16; j++) {
2988 vc->vc_palette[k++] = default_red[j];
2989 vc->vc_palette[k++] = default_grn[j];
2990 vc->vc_palette[k++] = default_blu[j];
2991 }
2992 set_palette(vc);
2993}
2994
2995/*
2996 * Font switching
2997 *
2998 * Currently we only support fonts up to 32 pixels wide, at a maximum height
2999 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
3000 * depending on width) reserved for each character which is kinda wasty, but
3001 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
3002 * is upto the actual low-level console-driver convert data into its favorite
3003 * format (maybe we should add a `fontoffset' field to the `display'
3004 * structure so we won't have to convert the fontdata all the time.
3005 * /Jes
3006 */
3007
3008#define max_font_size 65536
3009
3010static int con_font_get(struct vc_data *vc, struct console_font_op *op)
3011{
3012 struct console_font font;
3013 int rc = -EINVAL;
3014 int c;
3015
3016 if (vc->vc_mode != KD_TEXT)
3017 return -EINVAL;
3018
3019 if (op->data) {
3020 font.data = kmalloc(max_font_size, GFP_KERNEL);
3021 if (!font.data)
3022 return -ENOMEM;
3023 } else
3024 font.data = NULL;
3025
3026 acquire_console_sem();
3027 if (vc->vc_sw->con_font_get)
3028 rc = vc->vc_sw->con_font_get(vc, &font);
3029 else
3030 rc = -ENOSYS;
3031 release_console_sem();
3032
3033 if (rc)
3034 goto out;
3035
3036 c = (font.width+7)/8 * 32 * font.charcount;
3037
3038 if (op->data && font.charcount > op->charcount)
3039 rc = -ENOSPC;
3040 if (!(op->flags & KD_FONT_FLAG_OLD)) {
3041 if (font.width > op->width || font.height > op->height)
3042 rc = -ENOSPC;
3043 } else {
3044 if (font.width != 8)
3045 rc = -EIO;
3046 else if ((op->height && font.height > op->height) ||
3047 font.height > 32)
3048 rc = -ENOSPC;
3049 }
3050 if (rc)
3051 goto out;
3052
3053 op->height = font.height;
3054 op->width = font.width;
3055 op->charcount = font.charcount;
3056
3057 if (op->data && copy_to_user(op->data, font.data, c))
3058 rc = -EFAULT;
3059
3060out:
3061 kfree(font.data);
3062 return rc;
3063}
3064
3065static int con_font_set(struct vc_data *vc, struct console_font_op *op)
3066{
3067 struct console_font font;
3068 int rc = -EINVAL;
3069 int size;
3070
3071 if (vc->vc_mode != KD_TEXT)
3072 return -EINVAL;
3073 if (!op->data)
3074 return -EINVAL;
3075 if (op->charcount > 512)
3076 return -EINVAL;
3077 if (!op->height) { /* Need to guess font height [compat] */
3078 int h, i;
3079 u8 __user *charmap = op->data;
3080 u8 tmp;
3081
3082 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
3083 so that we can get rid of this soon */
3084 if (!(op->flags & KD_FONT_FLAG_OLD))
3085 return -EINVAL;
3086 for (h = 32; h > 0; h--)
3087 for (i = 0; i < op->charcount; i++) {
3088 if (get_user(tmp, &charmap[32*i+h-1]))
3089 return -EFAULT;
3090 if (tmp)
3091 goto nonzero;
3092 }
3093 return -EINVAL;
3094 nonzero:
3095 op->height = h;
3096 }
3097 if (op->width <= 0 || op->width > 32 || op->height > 32)
3098 return -EINVAL;
3099 size = (op->width+7)/8 * 32 * op->charcount;
3100 if (size > max_font_size)
3101 return -ENOSPC;
3102 font.charcount = op->charcount;
3103 font.height = op->height;
3104 font.width = op->width;
3105 font.data = kmalloc(size, GFP_KERNEL);
3106 if (!font.data)
3107 return -ENOMEM;
3108 if (copy_from_user(font.data, op->data, size)) {
3109 kfree(font.data);
3110 return -EFAULT;
3111 }
3112 acquire_console_sem();
3113 if (vc->vc_sw->con_font_set)
3114 rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
3115 else
3116 rc = -ENOSYS;
3117 release_console_sem();
3118 kfree(font.data);
3119 return rc;
3120}
3121
3122static int con_font_default(struct vc_data *vc, struct console_font_op *op)
3123{
3124 struct console_font font = {.width = op->width, .height = op->height};
3125 char name[MAX_FONT_NAME];
3126 char *s = name;
3127 int rc;
3128
3129 if (vc->vc_mode != KD_TEXT)
3130 return -EINVAL;
3131
3132 if (!op->data)
3133 s = NULL;
3134 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0)
3135 return -EFAULT;
3136 else
3137 name[MAX_FONT_NAME - 1] = 0;
3138
3139 acquire_console_sem();
3140 if (vc->vc_sw->con_font_default)
3141 rc = vc->vc_sw->con_font_default(vc, &font, s);
3142 else
3143 rc = -ENOSYS;
3144 release_console_sem();
3145 if (!rc) {
3146 op->width = font.width;
3147 op->height = font.height;
3148 }
3149 return rc;
3150}
3151
3152static int con_font_copy(struct vc_data *vc, struct console_font_op *op)
3153{
3154 int con = op->height;
3155 int rc;
3156
3157 if (vc->vc_mode != KD_TEXT)
3158 return -EINVAL;
3159
3160 acquire_console_sem();
3161 if (!vc->vc_sw->con_font_copy)
3162 rc = -ENOSYS;
3163 else if (con < 0 || !vc_cons_allocated(con))
3164 rc = -ENOTTY;
3165 else if (con == vc->vc_num) /* nothing to do */
3166 rc = 0;
3167 else
3168 rc = vc->vc_sw->con_font_copy(vc, con);
3169 release_console_sem();
3170 return rc;
3171}
3172
3173int con_font_op(struct vc_data *vc, struct console_font_op *op)
3174{
3175 switch (op->op) {
3176 case KD_FONT_OP_SET:
3177 return con_font_set(vc, op);
3178 case KD_FONT_OP_GET:
3179 return con_font_get(vc, op);
3180 case KD_FONT_OP_SET_DEFAULT:
3181 return con_font_default(vc, op);
3182 case KD_FONT_OP_COPY:
3183 return con_font_copy(vc, op);
3184 }
3185 return -ENOSYS;
3186}
3187
3188/*
3189 * Interface exported to selection and vcs.
3190 */
3191
3192/* used by selection */
3193u16 screen_glyph(struct vc_data *vc, int offset)
3194{
3195 u16 w = scr_readw(screenpos(vc, offset, 1));
3196 u16 c = w & 0xff;
3197
3198 if (w & vc->vc_hi_font_mask)
3199 c |= 0x100;
3200 return c;
3201}
3202
3203/* used by vcs - note the word offset */
3204unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed)
3205{
3206 return screenpos(vc, 2 * w_offset, viewed);
3207}
3208
3209void getconsxy(struct vc_data *vc, unsigned char *p)
3210{
3211 p[0] = vc->vc_x;
3212 p[1] = vc->vc_y;
3213}
3214
3215void putconsxy(struct vc_data *vc, unsigned char *p)
3216{
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
3237/*
3238 * Visible symbols for modules
3239 */
3240
3241EXPORT_SYMBOL(color_table);
3242EXPORT_SYMBOL(default_red);
3243EXPORT_SYMBOL(default_grn);
3244EXPORT_SYMBOL(default_blu);
3245EXPORT_SYMBOL(update_region);
3246EXPORT_SYMBOL(redraw_screen);
3247EXPORT_SYMBOL(vc_resize);
3248EXPORT_SYMBOL(fg_console);
3249EXPORT_SYMBOL(console_blank_hook);
3250EXPORT_SYMBOL(console_blanked);
3251EXPORT_SYMBOL(vc_cons);
3252#ifndef VT_SINGLE_DRIVER
3253EXPORT_SYMBOL(take_over_console);
3254EXPORT_SYMBOL(give_up_console);
3255#endif
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