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fbcon: allow fbcon to use the primary display driver
[deliverable/linux.git] / drivers / char / vt.c
CommitLineData
1da177e4
LT		 1/*
2 * linux/drivers/char/vt.c
3 *
4 * Copyright (C) 1991, 1992 Linus Torvalds
5 */
6
7/*
8 * Hopefully this will be a rather complete VT102 implementation.
9 *
10 * Beeping thanks to John T Kohl.
11 *
12 * Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics
13 * Chars, and VT100 enhancements by Peter MacDonald.
14 *
15 * Copy and paste function by Andrew Haylett,
16 * some enhancements by Alessandro Rubini.
17 *
18 * Code to check for different video-cards mostly by Galen Hunt,
19 * <g-hunt@ee.utah.edu>
20 *
21 * Rudimentary ISO 10646/Unicode/UTF-8 character set support by
22 * Markus Kuhn, <mskuhn@immd4.informatik.uni-erlangen.de>.
23 *
24 * Dynamic allocation of consoles, aeb@cwi.nl, May 1994
25 * Resizing of consoles, aeb, 940926
26 *
27 * Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94
28 * <poe@daimi.aau.dk>
29 *
30 * User-defined bell sound, new setterm control sequences and printk
31 * redirection by Martin Mares <mj@k332.feld.cvut.cz> 19-Nov-95
32 *
33 * APM screenblank bug fixed Takashi Manabe <manabe@roy.dsl.tutics.tut.jp>
34 *
35 * Merge with the abstract console driver by Geert Uytterhoeven
36 * <geert@linux-m68k.org>, Jan 1997.
37 *
38 * Original m68k console driver modifications by
39 *
40 * - Arno Griffioen <arno@usn.nl>
41 * - David Carter <carter@cs.bris.ac.uk>
42 *
43 * The abstract console driver provides a generic interface for a text
44 * console. It supports VGA text mode, frame buffer based graphical consoles
45 * and special graphics processors that are only accessible through some
46 * registers (e.g. a TMS340x0 GSP).
47 *
48 * The interface to the hardware is specified using a special structure
49 * (struct consw) which contains function pointers to console operations
50 * (see <linux/console.h> for more information).
51 *
52 * Support for changeable cursor shape
53 * by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997
54 *
55 * Ported to i386 and con_scrolldelta fixed
56 * by Emmanuel Marty <core@ggi-project.org>, April 1998
57 *
58 * Resurrected character buffers in videoram plus lots of other trickery
59 * by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998
60 *
61 * Removed old-style timers, introduced console_timer, made timer
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
d4328b40
AT		 66 *
67 * Fixed UTF-8 mode so alternate charset modes always work according
68 * to control sequences interpreted in do_con_trol function
69 * preserving backward VT100 semigraphics compatibility,
70 * malformed UTF sequences represented as sequences of replacement glyphs,
71 * original codes or '?' as a last resort if replacement glyph is undefined
72 * by Adam Tla/lka <atlka@pg.gda.pl>, Aug 2006
1da177e4
LT		 73 */
74
75#include <linux/module.h>
76#include <linux/types.h>
77#include <linux/sched.h>
78#include <linux/tty.h>
79#include <linux/tty_flip.h>
80#include <linux/kernel.h>
81#include <linux/string.h>
82#include <linux/errno.h>
83#include <linux/kd.h>
84#include <linux/slab.h>
85#include <linux/major.h>
86#include <linux/mm.h>
87#include <linux/console.h>
88#include <linux/init.h>
c831c338 89#include <linux/mutex.h>
1da177e4
LT		 90#include <linux/vt_kern.h>
91#include <linux/selection.h>
92#include <linux/tiocl.h>
93#include <linux/kbd_kern.h>
94#include <linux/consolemap.h>
95#include <linux/timer.h>
96#include <linux/interrupt.h>
1da177e4
LT		 97#include <linux/workqueue.h>
98#include <linux/bootmem.h>
99#include <linux/pm.h>
100#include <linux/font.h>
101#include <linux/bitops.h>
102
103#include <asm/io.h>
104#include <asm/system.h>
105#include <asm/uaccess.h>
106
3e795de7 107#define MAX_NR_CON_DRIVER 16
1da177e4 108
6db4063c 109#define CON_DRIVER_FLAG_MODULE 1
928e964f
AD		 110#define CON_DRIVER_FLAG_INIT 2
111#define CON_DRIVER_FLAG_ATTR 4
3e795de7
AD		 112
113struct con_driver {
114 const struct consw *con;
115 const char *desc;
805952a8 116 struct device *dev;
6db4063c 117 int node;
3e795de7
AD		 118 int first;
119 int last;
120 int flag;
121};
122
123static struct con_driver registered_con_driver[MAX_NR_CON_DRIVER];
1da177e4
LT		 124const struct consw *conswitchp;
125
126/* A bitmap for codes <32. A bit of 1 indicates that the code
127 * corresponding to that bit number invokes some special action
128 * (such as cursor movement) and should not be displayed as a
129 * glyph unless the disp_ctrl mode is explicitly enabled.
130 */
131#define CTRL_ACTION 0x0d00ff81
132#define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */
133
134/*
135 * Here is the default bell parameters: 750HZ, 1/8th of a second
136 */
137#define DEFAULT_BELL_PITCH 750
138#define DEFAULT_BELL_DURATION (HZ/8)
139
1da177e4
LT		 140struct vc vc_cons [MAX_NR_CONSOLES];
141
142#ifndef VT_SINGLE_DRIVER
143static const struct consw *con_driver_map[MAX_NR_CONSOLES];
144#endif
145
146static int con_open(struct tty_struct *, struct file *);
147static void vc_init(struct vc_data *vc, unsigned int rows,
148 unsigned int cols, int do_clear);
149static void gotoxy(struct vc_data *vc, int new_x, int new_y);
150static void save_cur(struct vc_data *vc);
151static void reset_terminal(struct vc_data *vc, int do_clear);
152static void con_flush_chars(struct tty_struct *tty);
403aac96 153static int set_vesa_blanking(char __user *p);
1da177e4
LT		 154static void set_cursor(struct vc_data *vc);
155static void hide_cursor(struct vc_data *vc);
65f27f38 156static void console_callback(struct work_struct *ignored);
1da177e4
LT		 157static void blank_screen_t(unsigned long dummy);
158static void set_palette(struct vc_data *vc);
159
160static int printable; /* Is console ready for printing? */
042f10ec
AD		 161static int default_utf8;
162module_param(default_utf8, int, S_IRUGO | S_IWUSR);
1da177e4
LT		 163
164/*
165 * ignore_poke: don't unblank the screen when things are typed. This is
166 * mainly for the privacy of braille terminal users.
167 */
168static int ignore_poke;
169
170int do_poke_blanked_console;
171int console_blanked;
172
173static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
174static int blankinterval = 10*60*HZ;
175static int vesa_off_interval;
176
65f27f38 177static DECLARE_WORK(console_work, console_callback);
1da177e4
LT		 178
179/*
180 * fg_console is the current virtual console,
181 * last_console is the last used one,
182 * want_console is the console we want to switch to,
183 * kmsg_redirect is the console for kernel messages,
184 */
185int fg_console;
186int last_console;
187int want_console = -1;
188int kmsg_redirect;
189
190/*
191 * For each existing display, we have a pointer to console currently visible
192 * on that display, allowing consoles other than fg_console to be refreshed
193 * appropriately. Unless the low-level driver supplies its own display_fg
194 * variable, we use this one for the "master display".
195 */
196static struct vc_data *master_display_fg;
197
198/*
199 * Unfortunately, we need to delay tty echo when we're currently writing to the
200 * console since the code is (and always was) not re-entrant, so we schedule
201 * all flip requests to process context with schedule-task() and run it from
202 * console_callback().
203 */
204
205/*
206 * For the same reason, we defer scrollback to the console callback.
207 */
208static int scrollback_delta;
209
210/*
211 * Hook so that the power management routines can (un)blank
212 * the console on our behalf.
213 */
214int (*console_blank_hook)(int);
215
40565f19 216static DEFINE_TIMER(console_timer, blank_screen_t, 0, 0);
1da177e4
LT		 217static int blank_state;
218static int blank_timer_expired;
219enum {
220 blank_off = 0,
221 blank_normal_wait,
222 blank_vesa_wait,
223};
224
225/*
226 * Low-Level Functions
227 */
228
229#define IS_FG(vc) ((vc)->vc_num == fg_console)
230
231#ifdef VT_BUF_VRAM_ONLY
232#define DO_UPDATE(vc) 0
233#else
234#define DO_UPDATE(vc) CON_IS_VISIBLE(vc)
235#endif
236
237static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed)
238{
239 unsigned short *p;
240
241 if (!viewed)
242 p = (unsigned short *)(vc->vc_origin + offset);
243 else if (!vc->vc_sw->con_screen_pos)
244 p = (unsigned short *)(vc->vc_visible_origin + offset);
245 else
246 p = vc->vc_sw->con_screen_pos(vc, offset);
247 return p;
248}
249
250static inline void scrolldelta(int lines)
251{
252 scrollback_delta += lines;
253 schedule_console_callback();
254}
255
256void schedule_console_callback(void)
257{
258 schedule_work(&console_work);
259}
260
261static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
262{
263 unsigned short *d, *s;
264
265 if (t+nr >= b)
266 nr = b - t - 1;
267 if (b > vc->vc_rows || t >= b || nr < 1)
268 return;
269 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr))
270 return;
271 d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
272 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr));
273 scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row);
274 scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_video_erase_char,
275 vc->vc_size_row * nr);
276}
277
278static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
279{
280 unsigned short *s;
281 unsigned int step;
282
283 if (t+nr >= b)
284 nr = b - t - 1;
285 if (b > vc->vc_rows || t >= b || nr < 1)
286 return;
287 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr))
288 return;
289 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
290 step = vc->vc_cols * nr;
291 scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row);
292 scr_memsetw(s, vc->vc_video_erase_char, 2 * step);
293}
294
295static void do_update_region(struct vc_data *vc, unsigned long start, int count)
296{
297#ifndef VT_BUF_VRAM_ONLY
298 unsigned int xx, yy, offset;
299 u16 *p;
300
301 p = (u16 *) start;
302 if (!vc->vc_sw->con_getxy) {
303 offset = (start - vc->vc_origin) / 2;
304 xx = offset % vc->vc_cols;
305 yy = offset / vc->vc_cols;
306 } else {
307 int nxx, nyy;
308 start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy);
309 xx = nxx; yy = nyy;
310 }
311 for(;;) {
312 u16 attrib = scr_readw(p) & 0xff00;
313 int startx = xx;
314 u16 *q = p;
315 while (xx < vc->vc_cols && count) {
316 if (attrib != (scr_readw(p) & 0xff00)) {
317 if (p > q)
318 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
319 startx = xx;
320 q = p;
321 attrib = scr_readw(p) & 0xff00;
322 }
323 p++;
324 xx++;
325 count--;
326 }
327 if (p > q)
328 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
329 if (!count)
330 break;
331 xx = 0;
332 yy++;
333 if (vc->vc_sw->con_getxy) {
334 p = (u16 *)start;
335 start = vc->vc_sw->con_getxy(vc, start, NULL, NULL);
336 }
337 }
338#endif
339}
340
341void update_region(struct vc_data *vc, unsigned long start, int count)
342{
343 WARN_CONSOLE_UNLOCKED();
344
345 if (DO_UPDATE(vc)) {
346 hide_cursor(vc);
347 do_update_region(vc, start, count);
348 set_cursor(vc);
349 }
350}
351
352/* Structure of attributes is hardware-dependent */
353
fa6ce9ab
JE		 354static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink,
355 u8 _underline, u8 _reverse, u8 _italic)
1da177e4
LT		 356{
357 if (vc->vc_sw->con_build_attr)
fa6ce9ab
JE		 358 return vc->vc_sw->con_build_attr(vc, _color, _intensity,
359 _blink, _underline, _reverse, _italic);
1da177e4
LT		 360
361#ifndef VT_BUF_VRAM_ONLY
362/*
363 * ++roman: I completely changed the attribute format for monochrome
364 * mode (!can_do_color). The formerly used MDA (monochrome display
365 * adapter) format didn't allow the combination of certain effects.
366 * Now the attribute is just a bit vector:
367 * Bit 0..1: intensity (0..2)
368 * Bit 2 : underline
369 * Bit 3 : reverse
370 * Bit 7 : blink
371 */
372 {
373 u8 a = vc->vc_color;
374 if (!vc->vc_can_do_color)
375 return _intensity |
fa6ce9ab 376 (_italic ? 2 : 0) |
1da177e4
LT		 377 (_underline ? 4 : 0) |
378 (_reverse ? 8 : 0) |
379 (_blink ? 0x80 : 0);
fa6ce9ab
JE		 380 if (_italic)
381 a = (a & 0xF0) | vc->vc_itcolor;
382 else if (_underline)
1da177e4
LT		 383 a = (a & 0xf0) | vc->vc_ulcolor;
384 else if (_intensity == 0)
385 a = (a & 0xf0) | vc->vc_ulcolor;
386 if (_reverse)
387 a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77);
388 if (_blink)
389 a ^= 0x80;
390 if (_intensity == 2)
391 a ^= 0x08;
392 if (vc->vc_hi_font_mask == 0x100)
393 a <<= 1;
394 return a;
395 }
396#else
397 return 0;
398#endif
399}
400
401static void update_attr(struct vc_data *vc)
402{
fa6ce9ab
JE		 403 vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity,
404 vc->vc_blink, vc->vc_underline,
405 vc->vc_reverse ^ vc->vc_decscnm, vc->vc_italic);
406 vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm, 0) << 8) | ' ';
1da177e4
LT		 407}
408
409/* Note: inverting the screen twice should revert to the original state */
410void invert_screen(struct vc_data *vc, int offset, int count, int viewed)
411{
412 unsigned short *p;
413
414 WARN_CONSOLE_UNLOCKED();
415
416 count /= 2;
417 p = screenpos(vc, offset, viewed);
418 if (vc->vc_sw->con_invert_region)
419 vc->vc_sw->con_invert_region(vc, p, count);
420#ifndef VT_BUF_VRAM_ONLY
421 else {
422 u16 *q = p;
423 int cnt = count;
424 u16 a;
425
426 if (!vc->vc_can_do_color) {
427 while (cnt--) {
428 a = scr_readw(q);
429 a ^= 0x0800;
430 scr_writew(a, q);
431 q++;
432 }
433 } else if (vc->vc_hi_font_mask == 0x100) {
434 while (cnt--) {
435 a = scr_readw(q);
436 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4);
437 scr_writew(a, q);
438 q++;
439 }
440 } else {
441 while (cnt--) {
442 a = scr_readw(q);
443 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4);
444 scr_writew(a, q);
445 q++;
446 }
447 }
448 }
449#endif
450 if (DO_UPDATE(vc))
451 do_update_region(vc, (unsigned long) p, count);
452}
453
454/* used by selection: complement pointer position */
455void complement_pos(struct vc_data *vc, int offset)
456{
414edcd3 457 static int old_offset = -1;
1da177e4
LT		 458 static unsigned short old;
459 static unsigned short oldx, oldy;
460
461 WARN_CONSOLE_UNLOCKED();
462
414edcd3
AD		 463 if (old_offset != -1 && old_offset >= 0 &&
464 old_offset < vc->vc_screenbuf_size) {
465 scr_writew(old, screenpos(vc, old_offset, 1));
1da177e4
LT		 466 if (DO_UPDATE(vc))
467 vc->vc_sw->con_putc(vc, old, oldy, oldx);
468 }
414edcd3
AD		 469
470 old_offset = offset;
471
472 if (offset != -1 && offset >= 0 &&
473 offset < vc->vc_screenbuf_size) {
1da177e4 474 unsigned short new;
414edcd3 475 unsigned short *p;
1da177e4
LT		 476 p = screenpos(vc, offset, 1);
477 old = scr_readw(p);
478 new = old ^ vc->vc_complement_mask;
479 scr_writew(new, p);
480 if (DO_UPDATE(vc)) {
481 oldx = (offset >> 1) % vc->vc_cols;
482 oldy = (offset >> 1) / vc->vc_cols;
483 vc->vc_sw->con_putc(vc, new, oldy, oldx);
484 }
485 }
414edcd3 486
1da177e4
LT		 487}
488
489static void insert_char(struct vc_data *vc, unsigned int nr)
490{
491 unsigned short *p, *q = (unsigned short *)vc->vc_pos;
492
493 p = q + vc->vc_cols - nr - vc->vc_x;
494 while (--p >= q)
495 scr_writew(scr_readw(p), p + nr);
496 scr_memsetw(q, vc->vc_video_erase_char, nr * 2);
497 vc->vc_need_wrap = 0;
498 if (DO_UPDATE(vc)) {
499 unsigned short oldattr = vc->vc_attr;
500 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x, vc->vc_y, vc->vc_x + nr, 1,
501 vc->vc_cols - vc->vc_x - nr);
502 vc->vc_attr = vc->vc_video_erase_char >> 8;
503 while (nr--)
504 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y, vc->vc_x + nr);
505 vc->vc_attr = oldattr;
506 }
507}
508
509static void delete_char(struct vc_data *vc, unsigned int nr)
510{
511 unsigned int i = vc->vc_x;
512 unsigned short *p = (unsigned short *)vc->vc_pos;
513
514 while (++i <= vc->vc_cols - nr) {
515 scr_writew(scr_readw(p+nr), p);
516 p++;
517 }
518 scr_memsetw(p, vc->vc_video_erase_char, nr * 2);
519 vc->vc_need_wrap = 0;
520 if (DO_UPDATE(vc)) {
521 unsigned short oldattr = vc->vc_attr;
522 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x + nr, vc->vc_y, vc->vc_x, 1,
523 vc->vc_cols - vc->vc_x - nr);
524 vc->vc_attr = vc->vc_video_erase_char >> 8;
525 while (nr--)
526 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y,
527 vc->vc_cols - 1 - nr);
528 vc->vc_attr = oldattr;
529 }
530}
531
532static int softcursor_original;
533
534static void add_softcursor(struct vc_data *vc)
535{
536 int i = scr_readw((u16 *) vc->vc_pos);
537 u32 type = vc->vc_cursor_type;
538
539 if (! (type & 0x10)) return;
540 if (softcursor_original != -1) return;
541 softcursor_original = i;
542 i |= ((type >> 8) & 0xff00 );
543 i ^= ((type) & 0xff00 );
544 if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000;
545 if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700;
546 scr_writew(i, (u16 *) vc->vc_pos);
547 if (DO_UPDATE(vc))
548 vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x);
549}
550
551static void hide_softcursor(struct vc_data *vc)
552{
553 if (softcursor_original != -1) {
554 scr_writew(softcursor_original, (u16 *)vc->vc_pos);
555 if (DO_UPDATE(vc))
556 vc->vc_sw->con_putc(vc, softcursor_original,
557 vc->vc_y, vc->vc_x);
558 softcursor_original = -1;
559 }
560}
561
562static void hide_cursor(struct vc_data *vc)
563{
564 if (vc == sel_cons)
565 clear_selection();
566 vc->vc_sw->con_cursor(vc, CM_ERASE);
567 hide_softcursor(vc);
568}
569
570static void set_cursor(struct vc_data *vc)
571{
572 if (!IS_FG(vc) || console_blanked ||
573 vc->vc_mode == KD_GRAPHICS)
574 return;
575 if (vc->vc_deccm) {
576 if (vc == sel_cons)
577 clear_selection();
578 add_softcursor(vc);
579 if ((vc->vc_cursor_type & 0x0f) != 1)
580 vc->vc_sw->con_cursor(vc, CM_DRAW);
581 } else
582 hide_cursor(vc);
583}
584
585static void set_origin(struct vc_data *vc)
586{
587 WARN_CONSOLE_UNLOCKED();
588
589 if (!CON_IS_VISIBLE(vc) ||
590 !vc->vc_sw->con_set_origin ||
591 !vc->vc_sw->con_set_origin(vc))
592 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
593 vc->vc_visible_origin = vc->vc_origin;
594 vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size;
595 vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x;
596}
597
598static inline void save_screen(struct vc_data *vc)
599{
600 WARN_CONSOLE_UNLOCKED();
601
602 if (vc->vc_sw->con_save_screen)
603 vc->vc_sw->con_save_screen(vc);
604}
605
606/*
607 * Redrawing of screen
608 */
609
610static void clear_buffer_attributes(struct vc_data *vc)
611{
612 unsigned short *p = (unsigned short *)vc->vc_origin;
613 int count = vc->vc_screenbuf_size / 2;
614 int mask = vc->vc_hi_font_mask | 0xff;
615
616 for (; count > 0; count--, p++) {
617 scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p);
618 }
619}
620
621void redraw_screen(struct vc_data *vc, int is_switch)
622{
623 int redraw = 0;
624
625 WARN_CONSOLE_UNLOCKED();
626
627 if (!vc) {
628 /* strange ... */
629 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
630 return;
631 }
632
633 if (is_switch) {
634 struct vc_data *old_vc = vc_cons[fg_console].d;
635 if (old_vc == vc)
636 return;
637 if (!CON_IS_VISIBLE(vc))
638 redraw = 1;
639 *vc->vc_display_fg = vc;
640 fg_console = vc->vc_num;
641 hide_cursor(old_vc);
642 if (!CON_IS_VISIBLE(old_vc)) {
643 save_screen(old_vc);
644 set_origin(old_vc);
645 }
646 } else {
647 hide_cursor(vc);
648 redraw = 1;
649 }
650
651 if (redraw) {
652 int update;
653 int old_was_color = vc->vc_can_do_color;
654
655 set_origin(vc);
656 update = vc->vc_sw->con_switch(vc);
657 set_palette(vc);
658 /*
659 * If console changed from mono<->color, the best we can do
660 * is to clear the buffer attributes. As it currently stands,
661 * rebuilding new attributes from the old buffer is not doable
662 * without overly complex code.
663 */
664 if (old_was_color != vc->vc_can_do_color) {
665 update_attr(vc);
666 clear_buffer_attributes(vc);
667 }
668 if (update && vc->vc_mode != KD_GRAPHICS)
669 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
670 }
671 set_cursor(vc);
672 if (is_switch) {
673 set_leds();
674 compute_shiftstate();
675 }
676}
677
678/*
679 * Allocation, freeing and resizing of VTs.
680 */
681
682int vc_cons_allocated(unsigned int i)
683{
684 return (i < MAX_NR_CONSOLES && vc_cons[i].d);
685}
686
687static void visual_init(struct vc_data *vc, int num, int init)
688{
689 /* ++Geert: vc->vc_sw->con_init determines console size */
690 if (vc->vc_sw)
691 module_put(vc->vc_sw->owner);
692 vc->vc_sw = conswitchp;
693#ifndef VT_SINGLE_DRIVER
694 if (con_driver_map[num])
695 vc->vc_sw = con_driver_map[num];
696#endif
697 __module_get(vc->vc_sw->owner);
698 vc->vc_num = num;
699 vc->vc_display_fg = &master_display_fg;
700 vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir;
701 vc->vc_uni_pagedir = 0;
702 vc->vc_hi_font_mask = 0;
703 vc->vc_complement_mask = 0;
704 vc->vc_can_do_color = 0;
705 vc->vc_sw->con_init(vc, init);
706 if (!vc->vc_complement_mask)
707 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
708 vc->vc_s_complement_mask = vc->vc_complement_mask;
709 vc->vc_size_row = vc->vc_cols << 1;
710 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
711}
712
713int vc_allocate(unsigned int currcons) /* return 0 on success */
714{
715 WARN_CONSOLE_UNLOCKED();
716
717 if (currcons >= MAX_NR_CONSOLES)
718 return -ENXIO;
719 if (!vc_cons[currcons].d) {
720 struct vc_data *vc;
721
722 /* prevent users from taking too much memory */
723 if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE))
724 return -EPERM;
725
726 /* due to the granularity of kmalloc, we waste some memory here */
727 /* the alloc is done in two steps, to optimize the common situation
728 of a 25x80 console (structsize=216, screenbuf_size=4000) */
729 /* although the numbers above are not valid since long ago, the
730 point is still up-to-date and the comment still has its value
731 even if only as a historical artifact. --mj, July 1998 */
a1152934 732 vc = kzalloc(sizeof(struct vc_data), GFP_KERNEL);
1da177e4
LT		 733 if (!vc)
734 return -ENOMEM;
1da177e4 735 vc_cons[currcons].d = vc;
c2c88f10 736 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
1da177e4
LT		 737 visual_init(vc, currcons, 1);
738 if (!*vc->vc_uni_pagedir_loc)
739 con_set_default_unimap(vc);
254e948b
CM		 740 if (!vc->vc_kmalloced)
741 vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL);
1da177e4
LT		 742 if (!vc->vc_screenbuf) {
743 kfree(vc);
744 vc_cons[currcons].d = NULL;
745 return -ENOMEM;
746 }
747 vc->vc_kmalloced = 1;
748 vc_init(vc, vc->vc_rows, vc->vc_cols, 1);
749 }
750 return 0;
751}
752
753static inline int resize_screen(struct vc_data *vc, int width, int height)
754{
755 /* Resizes the resolution of the display adapater */
756 int err = 0;
757
758 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize)
759 err = vc->vc_sw->con_resize(vc, width, height);
760 return err;
761}
762
763/*
764 * Change # of rows and columns (0 means unchanged/the size of fg_console)
765 * [this is to be used together with some user program
766 * like resize that changes the hardware videomode]
767 */
768#define VC_RESIZE_MAXCOL (32767)
769#define VC_RESIZE_MAXROW (32767)
770int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int lines)
771{
772 unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0;
773 unsigned int old_cols, old_rows, old_row_size, old_screen_size;
774 unsigned int new_cols, new_rows, new_row_size, new_screen_size;
3b41dc1a 775 unsigned int end;
1da177e4
LT		 776 unsigned short *newscreen;
777
778 WARN_CONSOLE_UNLOCKED();
779
780 if (!vc)
781 return -ENXIO;
782
783 if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW)
784 return -EINVAL;
785
786 new_cols = (cols ? cols : vc->vc_cols);
787 new_rows = (lines ? lines : vc->vc_rows);
788 new_row_size = new_cols << 1;
789 new_screen_size = new_row_size * new_rows;
790
791 if (new_cols == vc->vc_cols && new_rows == vc->vc_rows)
792 return 0;
793
5cbded58 794 newscreen = kmalloc(new_screen_size, GFP_USER);
1da177e4
LT		 795 if (!newscreen)
796 return -ENOMEM;
797
798 old_rows = vc->vc_rows;
799 old_cols = vc->vc_cols;
800 old_row_size = vc->vc_size_row;
801 old_screen_size = vc->vc_screenbuf_size;
802
803 err = resize_screen(vc, new_cols, new_rows);
804 if (err) {
805 kfree(newscreen);
806 return err;
807 }
808
809 vc->vc_rows = new_rows;
810 vc->vc_cols = new_cols;
811 vc->vc_size_row = new_row_size;
812 vc->vc_screenbuf_size = new_screen_size;
813
814 rlth = min(old_row_size, new_row_size);
815 rrem = new_row_size - rlth;
816 old_origin = vc->vc_origin;
817 new_origin = (long) newscreen;
818 new_scr_end = new_origin + new_screen_size;
3b41dc1a
AD		 819
820 if (vc->vc_y > new_rows) {
821 if (old_rows - vc->vc_y < new_rows) {
822 /*
823 * Cursor near the bottom, copy contents from the
824 * bottom of buffer
825 */
826 old_origin += (old_rows - new_rows) * old_row_size;
827 end = vc->vc_scr_end;
828 } else {
829 /*
830 * Cursor is in no man's land, copy 1/2 screenful
831 * from the top and bottom of cursor position
832 */
833 old_origin += (vc->vc_y - new_rows/2) * old_row_size;
065d9cac 834 end = old_origin + (old_row_size * new_rows);
3b41dc1a
AD		 835 }
836 } else
837 /*
838 * Cursor near the top, copy contents from the top of buffer
839 */
065d9cac
AD		 840 end = (old_rows > new_rows) ? old_origin +
841 (old_row_size * new_rows) :
3b41dc1a 842 vc->vc_scr_end;
1da177e4
LT		 843
844 update_attr(vc);
845
3b41dc1a
AD		 846 while (old_origin < end) {
847 scr_memcpyw((unsigned short *) new_origin,
848 (unsigned short *) old_origin, rlth);
1da177e4 849 if (rrem)
3b41dc1a
AD		 850 scr_memsetw((void *)(new_origin + rlth),
851 vc->vc_video_erase_char, rrem);
1da177e4
LT		 852 old_origin += old_row_size;
853 new_origin += new_row_size;
854 }
855 if (new_scr_end > new_origin)
3b41dc1a
AD		 856 scr_memsetw((void *)new_origin, vc->vc_video_erase_char,
857 new_scr_end - new_origin);
1da177e4
LT		 858 if (vc->vc_kmalloced)
859 kfree(vc->vc_screenbuf);
860 vc->vc_screenbuf = newscreen;
861 vc->vc_kmalloced = 1;
862 vc->vc_screenbuf_size = new_screen_size;
863 set_origin(vc);
864
865 /* do part of a reset_terminal() */
866 vc->vc_top = 0;
867 vc->vc_bottom = vc->vc_rows;
868 gotoxy(vc, vc->vc_x, vc->vc_y);
869 save_cur(vc);
870
871 if (vc->vc_tty) {
872 struct winsize ws, *cws = &vc->vc_tty->winsize;
873
874 memset(&ws, 0, sizeof(ws));
875 ws.ws_row = vc->vc_rows;
876 ws.ws_col = vc->vc_cols;
877 ws.ws_ypixel = vc->vc_scan_lines;
878 if ((ws.ws_row != cws->ws_row || ws.ws_col != cws->ws_col) &&
ab521dc0
EB		 879 vc->vc_tty->pgrp)
880 kill_pgrp(vc->vc_tty->pgrp, SIGWINCH, 1);
1da177e4
LT		 881 *cws = ws;
882 }
883
884 if (CON_IS_VISIBLE(vc))
885 update_screen(vc);
886 return err;
887}
888
ca9bda00
AC		 889int vc_lock_resize(struct vc_data *vc, unsigned int cols, unsigned int lines)
890{
891 int rc;
892
893 acquire_console_sem();
894 rc = vc_resize(vc, cols, lines);
895 release_console_sem();
896 return rc;
897}
1da177e4 898
ca9bda00 899void vc_deallocate(unsigned int currcons)
1da177e4
LT		 900{
901 WARN_CONSOLE_UNLOCKED();
902
903 if (vc_cons_allocated(currcons)) {
904 struct vc_data *vc = vc_cons[currcons].d;
905 vc->vc_sw->con_deinit(vc);
bde0d2c9 906 put_pid(vc->vt_pid);
d459ec0b 907 module_put(vc->vc_sw->owner);
1da177e4
LT		 908 if (vc->vc_kmalloced)
909 kfree(vc->vc_screenbuf);
910 if (currcons >= MIN_NR_CONSOLES)
911 kfree(vc);
912 vc_cons[currcons].d = NULL;
913 }
914}
915
916/*
917 * VT102 emulator
918 */
919
920#define set_kbd(vc, x) set_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
921#define clr_kbd(vc, x) clr_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
922#define is_kbd(vc, x) vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
923
924#define decarm VC_REPEAT
925#define decckm VC_CKMODE
926#define kbdapplic VC_APPLIC
927#define lnm VC_CRLF
928
929/*
930 * this is what the terminal answers to a ESC-Z or csi0c query.
931 */
932#define VT100ID "\033[?1;2c"
933#define VT102ID "\033[?6c"
934
935unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7,
936 8,12,10,14, 9,13,11,15 };
937
938/* the default colour table, for VGA+ colour systems */
939int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
940 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
941int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
942 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
943int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
944 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
945
1c2bbe6a
JE		 946module_param_array(default_red, int, NULL, S_IRUGO | S_IWUSR);
947module_param_array(default_grn, int, NULL, S_IRUGO | S_IWUSR);
948module_param_array(default_blu, int, NULL, S_IRUGO | S_IWUSR);
949
1da177e4
LT		 950/*
951 * gotoxy() must verify all boundaries, because the arguments
952 * might also be negative. If the given position is out of
953 * bounds, the cursor is placed at the nearest margin.
954 */
955static void gotoxy(struct vc_data *vc, int new_x, int new_y)
956{
957 int min_y, max_y;
958
959 if (new_x < 0)
960 vc->vc_x = 0;
961 else {
962 if (new_x >= vc->vc_cols)
963 vc->vc_x = vc->vc_cols - 1;
964 else
965 vc->vc_x = new_x;
966 }
967
968 if (vc->vc_decom) {
969 min_y = vc->vc_top;
970 max_y = vc->vc_bottom;
971 } else {
972 min_y = 0;
973 max_y = vc->vc_rows;
974 }
975 if (new_y < min_y)
976 vc->vc_y = min_y;
977 else if (new_y >= max_y)
978 vc->vc_y = max_y - 1;
979 else
980 vc->vc_y = new_y;
981 vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1);
982 vc->vc_need_wrap = 0;
983}
984
985/* for absolute user moves, when decom is set */
986static void gotoxay(struct vc_data *vc, int new_x, int new_y)
987{
988 gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y);
989}
990
991void scrollback(struct vc_data *vc, int lines)
992{
993 if (!lines)
994 lines = vc->vc_rows / 2;
995 scrolldelta(-lines);
996}
997
998void scrollfront(struct vc_data *vc, int lines)
999{
1000 if (!lines)
1001 lines = vc->vc_rows / 2;
1002 scrolldelta(lines);
1003}
1004
1005static void lf(struct vc_data *vc)
1006{
1007 /* don't scroll if above bottom of scrolling region, or
1008 * if below scrolling region
1009 */
1010 if (vc->vc_y + 1 == vc->vc_bottom)
1011 scrup(vc, vc->vc_top, vc->vc_bottom, 1);
1012 else if (vc->vc_y < vc->vc_rows - 1) {
1013 vc->vc_y++;
1014 vc->vc_pos += vc->vc_size_row;
1015 }
1016 vc->vc_need_wrap = 0;
1017}
1018
1019static void ri(struct vc_data *vc)
1020{
1021 /* don't scroll if below top of scrolling region, or
1022 * if above scrolling region
1023 */
1024 if (vc->vc_y == vc->vc_top)
1025 scrdown(vc, vc->vc_top, vc->vc_bottom, 1);
1026 else if (vc->vc_y > 0) {
1027 vc->vc_y--;
1028 vc->vc_pos -= vc->vc_size_row;
1029 }
1030 vc->vc_need_wrap = 0;
1031}
1032
1033static inline void cr(struct vc_data *vc)
1034{
1035 vc->vc_pos -= vc->vc_x << 1;
1036 vc->vc_need_wrap = vc->vc_x = 0;
1037}
1038
1039static inline void bs(struct vc_data *vc)
1040{
1041 if (vc->vc_x) {
1042 vc->vc_pos -= 2;
1043 vc->vc_x--;
1044 vc->vc_need_wrap = 0;
1045 }
1046}
1047
1048static inline void del(struct vc_data *vc)
1049{
1050 /* ignored */
1051}
1052
1053static void csi_J(struct vc_data *vc, int vpar)
1054{
1055 unsigned int count;
1056 unsigned short * start;
1057
1058 switch (vpar) {
1059 case 0: /* erase from cursor to end of display */
1060 count = (vc->vc_scr_end - vc->vc_pos) >> 1;
1061 start = (unsigned short *)vc->vc_pos;
1062 if (DO_UPDATE(vc)) {
1063 /* do in two stages */
1064 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1065 vc->vc_cols - vc->vc_x);
1066 vc->vc_sw->con_clear(vc, vc->vc_y + 1, 0,
1067 vc->vc_rows - vc->vc_y - 1,
1068 vc->vc_cols);
1069 }
1070 break;
1071 case 1: /* erase from start to cursor */
1072 count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1;
1073 start = (unsigned short *)vc->vc_origin;
1074 if (DO_UPDATE(vc)) {
1075 /* do in two stages */
1076 vc->vc_sw->con_clear(vc, 0, 0, vc->vc_y,
1077 vc->vc_cols);
1078 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1079 vc->vc_x + 1);
1080 }
1081 break;
1082 case 2: /* erase whole display */
1083 count = vc->vc_cols * vc->vc_rows;
1084 start = (unsigned short *)vc->vc_origin;
1085 if (DO_UPDATE(vc))
1086 vc->vc_sw->con_clear(vc, 0, 0,
1087 vc->vc_rows,
1088 vc->vc_cols);
1089 break;
1090 default:
1091 return;
1092 }
1093 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1094 vc->vc_need_wrap = 0;
1095}
1096
1097static void csi_K(struct vc_data *vc, int vpar)
1098{
1099 unsigned int count;
1100 unsigned short * start;
1101
1102 switch (vpar) {
1103 case 0: /* erase from cursor to end of line */
1104 count = vc->vc_cols - vc->vc_x;
1105 start = (unsigned short *)vc->vc_pos;
1106 if (DO_UPDATE(vc))
1107 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1108 vc->vc_cols - vc->vc_x);
1109 break;
1110 case 1: /* erase from start of line to cursor */
1111 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1112 count = vc->vc_x + 1;
1113 if (DO_UPDATE(vc))
1114 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1115 vc->vc_x + 1);
1116 break;
1117 case 2: /* erase whole line */
1118 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1119 count = vc->vc_cols;
1120 if (DO_UPDATE(vc))
1121 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1122 vc->vc_cols);
1123 break;
1124 default:
1125 return;
1126 }
1127 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1128 vc->vc_need_wrap = 0;
1129}
1130
1131static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */
1132{ /* not vt100? */
1133 int count;
1134
1135 if (!vpar)
1136 vpar++;
1137 count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar;
1138
1139 scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count);
1140 if (DO_UPDATE(vc))
1141 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count);
1142 vc->vc_need_wrap = 0;
1143}
1144
1145static void default_attr(struct vc_data *vc)
1146{
1147 vc->vc_intensity = 1;
fa6ce9ab 1148 vc->vc_italic = 0;
1da177e4
LT		 1149 vc->vc_underline = 0;
1150 vc->vc_reverse = 0;
1151 vc->vc_blink = 0;
1152 vc->vc_color = vc->vc_def_color;
1153}
1154
1155/* console_sem is held */
1156static void csi_m(struct vc_data *vc)
1157{
1158 int i;
1159
1160 for (i = 0; i <= vc->vc_npar; i++)
1161 switch (vc->vc_par[i]) {
1162 case 0: /* all attributes off */
1163 default_attr(vc);
1164 break;
1165 case 1:
1166 vc->vc_intensity = 2;
1167 break;
1168 case 2:
1169 vc->vc_intensity = 0;
1170 break;
fa6ce9ab
JE		 1171 case 3:
1172 vc->vc_italic = 1;
1173 break;
1da177e4
LT		 1174 case 4:
1175 vc->vc_underline = 1;
1176 break;
1177 case 5:
1178 vc->vc_blink = 1;
1179 break;
1180 case 7:
1181 vc->vc_reverse = 1;
1182 break;
1183 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1184 * Select primary font, don't display
1185 * control chars if defined, don't set
1186 * bit 8 on output.
1187 */
1188 vc->vc_translate = set_translate(vc->vc_charset == 0
1189 ? vc->vc_G0_charset
1190 : vc->vc_G1_charset, vc);
1191 vc->vc_disp_ctrl = 0;
1192 vc->vc_toggle_meta = 0;
1193 break;
1194 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1195 * Select first alternate font, lets
1196 * chars < 32 be displayed as ROM chars.
1197 */
1198 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1199 vc->vc_disp_ctrl = 1;
1200 vc->vc_toggle_meta = 0;
1201 break;
1202 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1203 * Select second alternate font, toggle
1204 * high bit before displaying as ROM char.
1205 */
1206 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1207 vc->vc_disp_ctrl = 1;
1208 vc->vc_toggle_meta = 1;
1209 break;
1210 case 21:
1211 case 22:
1212 vc->vc_intensity = 1;
1213 break;
fa6ce9ab
JE		 1214 case 23:
1215 vc->vc_italic = 0;
1216 break;
1da177e4
LT		 1217 case 24:
1218 vc->vc_underline = 0;
1219 break;
1220 case 25:
1221 vc->vc_blink = 0;
1222 break;
1223 case 27:
1224 vc->vc_reverse = 0;
1225 break;
1226 case 38: /* ANSI X3.64-1979 (SCO-ish?)
1227 * Enables underscore, white foreground
1228 * with white underscore (Linux - use
1229 * default foreground).
1230 */
1231 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1232 vc->vc_underline = 1;
1233 break;
1234 case 39: /* ANSI X3.64-1979 (SCO-ish?)
1235 * Disable underline option.
1236 * Reset colour to default? It did this
1237 * before...
1238 */
1239 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1240 vc->vc_underline = 0;
1241 break;
1242 case 49:
1243 vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f);
1244 break;
1245 default:
1246 if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37)
1247 vc->vc_color = color_table[vc->vc_par[i] - 30]
1248 | (vc->vc_color & 0xf0);
1249 else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47)
1250 vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4)
1251 | (vc->vc_color & 0x0f);
1252 break;
1253 }
1254 update_attr(vc);
1255}
1256
1257static void respond_string(const char *p, struct tty_struct *tty)
1258{
1259 while (*p) {
1260 tty_insert_flip_char(tty, *p, 0);
1261 p++;
1262 }
1263 con_schedule_flip(tty);
1264}
1265
1266static void cursor_report(struct vc_data *vc, struct tty_struct *tty)
1267{
1268 char buf[40];
1269
1270 sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1);
1271 respond_string(buf, tty);
1272}
1273
1274static inline void status_report(struct tty_struct *tty)
1275{
1276 respond_string("\033[0n", tty); /* Terminal ok */
1277}
1278
1279static inline void respond_ID(struct tty_struct * tty)
1280{
1281 respond_string(VT102ID, tty);
1282}
1283
1284void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry)
1285{
1286 char buf[8];
1287
1288 sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx),
1289 (char)('!' + mry));
1290 respond_string(buf, tty);
1291}
1292
1293/* invoked via ioctl(TIOCLINUX) and through set_selection */
1294int mouse_reporting(void)
1295{
1296 return vc_cons[fg_console].d->vc_report_mouse;
1297}
1298
1299/* console_sem is held */
1300static void set_mode(struct vc_data *vc, int on_off)
1301{
1302 int i;
1303
1304 for (i = 0; i <= vc->vc_npar; i++)
1305 if (vc->vc_ques) {
1306 switch(vc->vc_par[i]) { /* DEC private modes set/reset */
1307 case 1: /* Cursor keys send ^[Ox/^[[x */
1308 if (on_off)
1309 set_kbd(vc, decckm);
1310 else
1311 clr_kbd(vc, decckm);
1312 break;
1313 case 3: /* 80/132 mode switch unimplemented */
1314 vc->vc_deccolm = on_off;
1315#if 0
1316 vc_resize(deccolm ? 132 : 80, vc->vc_rows);
1317 /* this alone does not suffice; some user mode
1318 utility has to change the hardware regs */
1319#endif
1320 break;
1321 case 5: /* Inverted screen on/off */
1322 if (vc->vc_decscnm != on_off) {
1323 vc->vc_decscnm = on_off;
1324 invert_screen(vc, 0, vc->vc_screenbuf_size, 0);
1325 update_attr(vc);
1326 }
1327 break;
1328 case 6: /* Origin relative/absolute */
1329 vc->vc_decom = on_off;
1330 gotoxay(vc, 0, 0);
1331 break;
1332 case 7: /* Autowrap on/off */
1333 vc->vc_decawm = on_off;
1334 break;
1335 case 8: /* Autorepeat on/off */
1336 if (on_off)
1337 set_kbd(vc, decarm);
1338 else
1339 clr_kbd(vc, decarm);
1340 break;
1341 case 9:
1342 vc->vc_report_mouse = on_off ? 1 : 0;
1343 break;
1344 case 25: /* Cursor on/off */
1345 vc->vc_deccm = on_off;
1346 break;
1347 case 1000:
1348 vc->vc_report_mouse = on_off ? 2 : 0;
1349 break;
1350 }
1351 } else {
1352 switch(vc->vc_par[i]) { /* ANSI modes set/reset */
1353 case 3: /* Monitor (display ctrls) */
1354 vc->vc_disp_ctrl = on_off;
1355 break;
1356 case 4: /* Insert Mode on/off */
1357 vc->vc_decim = on_off;
1358 break;
1359 case 20: /* Lf, Enter == CrLf/Lf */
1360 if (on_off)
1361 set_kbd(vc, lnm);
1362 else
1363 clr_kbd(vc, lnm);
1364 break;
1365 }
1366 }
1367}
1368
1369/* console_sem is held */
1370static void setterm_command(struct vc_data *vc)
1371{
1372 switch(vc->vc_par[0]) {
1373 case 1: /* set color for underline mode */
1374 if (vc->vc_can_do_color &&
1375 vc->vc_par[1] < 16) {
1376 vc->vc_ulcolor = color_table[vc->vc_par[1]];
1377 if (vc->vc_underline)
1378 update_attr(vc);
1379 }
1380 break;
1381 case 2: /* set color for half intensity mode */
1382 if (vc->vc_can_do_color &&
1383 vc->vc_par[1] < 16) {
1384 vc->vc_halfcolor = color_table[vc->vc_par[1]];
1385 if (vc->vc_intensity == 0)
1386 update_attr(vc);
1387 }
1388 break;
1389 case 8: /* store colors as defaults */
1390 vc->vc_def_color = vc->vc_attr;
1391 if (vc->vc_hi_font_mask == 0x100)
1392 vc->vc_def_color >>= 1;
1393 default_attr(vc);
1394 update_attr(vc);
1395 break;
1396 case 9: /* set blanking interval */
1397 blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1398 poke_blanked_console();
1399 break;
1400 case 10: /* set bell frequency in Hz */
1401 if (vc->vc_npar >= 1)
1402 vc->vc_bell_pitch = vc->vc_par[1];
1403 else
1404 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1405 break;
1406 case 11: /* set bell duration in msec */
1407 if (vc->vc_npar >= 1)
1408 vc->vc_bell_duration = (vc->vc_par[1] < 2000) ?
1409 vc->vc_par[1] * HZ / 1000 : 0;
1410 else
1411 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1412 break;
1413 case 12: /* bring specified console to the front */
1414 if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1))
1415 set_console(vc->vc_par[1] - 1);
1416 break;
1417 case 13: /* unblank the screen */
1418 poke_blanked_console();
1419 break;
1420 case 14: /* set vesa powerdown interval */
1421 vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1422 break;
1423 case 15: /* activate the previous console */
1424 set_console(last_console);
1425 break;
1426 }
1427}
1428
1429/* console_sem is held */
1430static void csi_at(struct vc_data *vc, unsigned int nr)
1431{
1432 if (nr > vc->vc_cols - vc->vc_x)
1433 nr = vc->vc_cols - vc->vc_x;
1434 else if (!nr)
1435 nr = 1;
1436 insert_char(vc, nr);
1437}
1438
1439/* console_sem is held */
1440static void csi_L(struct vc_data *vc, unsigned int nr)
1441{
1442 if (nr > vc->vc_rows - vc->vc_y)
1443 nr = vc->vc_rows - vc->vc_y;
1444 else if (!nr)
1445 nr = 1;
1446 scrdown(vc, vc->vc_y, vc->vc_bottom, nr);
1447 vc->vc_need_wrap = 0;
1448}
1449
1450/* console_sem is held */
1451static void csi_P(struct vc_data *vc, unsigned int nr)
1452{
1453 if (nr > vc->vc_cols - vc->vc_x)
1454 nr = vc->vc_cols - vc->vc_x;
1455 else if (!nr)
1456 nr = 1;
1457 delete_char(vc, nr);
1458}
1459
1460/* console_sem is held */
1461static void csi_M(struct vc_data *vc, unsigned int nr)
1462{
1463 if (nr > vc->vc_rows - vc->vc_y)
1464 nr = vc->vc_rows - vc->vc_y;
1465 else if (!nr)
1466 nr=1;
1467 scrup(vc, vc->vc_y, vc->vc_bottom, nr);
1468 vc->vc_need_wrap = 0;
1469}
1470
1471/* console_sem is held (except via vc_init->reset_terminal */
1472static void save_cur(struct vc_data *vc)
1473{
1474 vc->vc_saved_x = vc->vc_x;
1475 vc->vc_saved_y = vc->vc_y;
1476 vc->vc_s_intensity = vc->vc_intensity;
fa6ce9ab 1477 vc->vc_s_italic = vc->vc_italic;
1da177e4
LT		 1478 vc->vc_s_underline = vc->vc_underline;
1479 vc->vc_s_blink = vc->vc_blink;
1480 vc->vc_s_reverse = vc->vc_reverse;
1481 vc->vc_s_charset = vc->vc_charset;
1482 vc->vc_s_color = vc->vc_color;
1483 vc->vc_saved_G0 = vc->vc_G0_charset;
1484 vc->vc_saved_G1 = vc->vc_G1_charset;
1485}
1486
1487/* console_sem is held */
1488static void restore_cur(struct vc_data *vc)
1489{
1490 gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y);
1491 vc->vc_intensity = vc->vc_s_intensity;
fa6ce9ab 1492 vc->vc_italic = vc->vc_s_italic;
1da177e4
LT		 1493 vc->vc_underline = vc->vc_s_underline;
1494 vc->vc_blink = vc->vc_s_blink;
1495 vc->vc_reverse = vc->vc_s_reverse;
1496 vc->vc_charset = vc->vc_s_charset;
1497 vc->vc_color = vc->vc_s_color;
1498 vc->vc_G0_charset = vc->vc_saved_G0;
1499 vc->vc_G1_charset = vc->vc_saved_G1;
1500 vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc);
1501 update_attr(vc);
1502 vc->vc_need_wrap = 0;
1503}
1504
1505enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey,
1506 EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd,
1507 ESpalette };
1508
1509/* console_sem is held (except via vc_init()) */
1510static void reset_terminal(struct vc_data *vc, int do_clear)
1511{
1512 vc->vc_top = 0;
1513 vc->vc_bottom = vc->vc_rows;
1514 vc->vc_state = ESnormal;
1515 vc->vc_ques = 0;
1516 vc->vc_translate = set_translate(LAT1_MAP, vc);
1517 vc->vc_G0_charset = LAT1_MAP;
1518 vc->vc_G1_charset = GRAF_MAP;
1519 vc->vc_charset = 0;
1520 vc->vc_need_wrap = 0;
1521 vc->vc_report_mouse = 0;
042f10ec 1522 vc->vc_utf = default_utf8;
1da177e4
LT		 1523 vc->vc_utf_count = 0;
1524
1525 vc->vc_disp_ctrl = 0;
1526 vc->vc_toggle_meta = 0;
1527
1528 vc->vc_decscnm = 0;
1529 vc->vc_decom = 0;
1530 vc->vc_decawm = 1;
1531 vc->vc_deccm = 1;
1532 vc->vc_decim = 0;
1533
1534 set_kbd(vc, decarm);
1535 clr_kbd(vc, decckm);
1536 clr_kbd(vc, kbdapplic);
1537 clr_kbd(vc, lnm);
1538 kbd_table[vc->vc_num].lockstate = 0;
1539 kbd_table[vc->vc_num].slockstate = 0;
1540 kbd_table[vc->vc_num].ledmode = LED_SHOW_FLAGS;
1541 kbd_table[vc->vc_num].ledflagstate = kbd_table[vc->vc_num].default_ledflagstate;
1542 /* do not do set_leds here because this causes an endless tasklet loop
1543 when the keyboard hasn't been initialized yet */
1544
1545 vc->vc_cursor_type = CUR_DEFAULT;
1546 vc->vc_complement_mask = vc->vc_s_complement_mask;
1547
1548 default_attr(vc);
1549 update_attr(vc);
1550
1551 vc->vc_tab_stop[0] = 0x01010100;
1552 vc->vc_tab_stop[1] =
1553 vc->vc_tab_stop[2] =
1554 vc->vc_tab_stop[3] =
1555 vc->vc_tab_stop[4] = 0x01010101;
1556
1557 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1558 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1559
1560 gotoxy(vc, 0, 0);
1561 save_cur(vc);
1562 if (do_clear)
1563 csi_J(vc, 2);
1564}
1565
1566/* console_sem is held */
1567static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
1568{
1569 /*
1570 * Control characters can be used in the _middle_
1571 * of an escape sequence.
1572 */
1573 switch (c) {
1574 case 0:
1575 return;
1576 case 7:
1577 if (vc->vc_bell_duration)
1578 kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration);
1579 return;
1580 case 8:
1581 bs(vc);
1582 return;
1583 case 9:
1584 vc->vc_pos -= (vc->vc_x << 1);
1585 while (vc->vc_x < vc->vc_cols - 1) {
1586 vc->vc_x++;
1587 if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31)))
1588 break;
1589 }
1590 vc->vc_pos += (vc->vc_x << 1);
1591 return;
1592 case 10: case 11: case 12:
1593 lf(vc);
1594 if (!is_kbd(vc, lnm))
1595 return;
1596 case 13:
1597 cr(vc);
1598 return;
1599 case 14:
1600 vc->vc_charset = 1;
1601 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1602 vc->vc_disp_ctrl = 1;
1603 return;
1604 case 15:
1605 vc->vc_charset = 0;
1606 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1607 vc->vc_disp_ctrl = 0;
1608 return;
1609 case 24: case 26:
1610 vc->vc_state = ESnormal;
1611 return;
1612 case 27:
1613 vc->vc_state = ESesc;
1614 return;
1615 case 127:
1616 del(vc);
1617 return;
1618 case 128+27:
1619 vc->vc_state = ESsquare;
1620 return;
1621 }
1622 switch(vc->vc_state) {
1623 case ESesc:
1624 vc->vc_state = ESnormal;
1625 switch (c) {
1626 case '[':
1627 vc->vc_state = ESsquare;
1628 return;
1629 case ']':
1630 vc->vc_state = ESnonstd;
1631 return;
1632 case '%':
1633 vc->vc_state = ESpercent;
1634 return;
1635 case 'E':
1636 cr(vc);
1637 lf(vc);
1638 return;
1639 case 'M':
1640 ri(vc);
1641 return;
1642 case 'D':
1643 lf(vc);
1644 return;
1645 case 'H':
1646 vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31));
1647 return;
1648 case 'Z':
1649 respond_ID(tty);
1650 return;
1651 case '7':
1652 save_cur(vc);
1653 return;
1654 case '8':
1655 restore_cur(vc);
1656 return;
1657 case '(':
1658 vc->vc_state = ESsetG0;
1659 return;
1660 case ')':
1661 vc->vc_state = ESsetG1;
1662 return;
1663 case '#':
1664 vc->vc_state = EShash;
1665 return;
1666 case 'c':
1667 reset_terminal(vc, 1);
1668 return;
1669 case '>': /* Numeric keypad */
1670 clr_kbd(vc, kbdapplic);
1671 return;
1672 case '=': /* Appl. keypad */
1673 set_kbd(vc, kbdapplic);
1674 return;
1675 }
1676 return;
1677 case ESnonstd:
1678 if (c=='P') { /* palette escape sequence */
1679 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1680 vc->vc_par[vc->vc_npar] = 0;
1681 vc->vc_npar = 0;
1682 vc->vc_state = ESpalette;
1683 return;
1684 } else if (c=='R') { /* reset palette */
1685 reset_palette(vc);
1686 vc->vc_state = ESnormal;
1687 } else
1688 vc->vc_state = ESnormal;
1689 return;
1690 case ESpalette:
1691 if ( (c>='0'&&c<='9') || (c>='A'&&c<='F') || (c>='a'&&c<='f') ) {
1692 vc->vc_par[vc->vc_npar++] = (c > '9' ? (c & 0xDF) - 'A' + 10 : c - '0');
1693 if (vc->vc_npar == 7) {
1694 int i = vc->vc_par[0] * 3, j = 1;
1695 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1696 vc->vc_palette[i++] += vc->vc_par[j++];
1697 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1698 vc->vc_palette[i++] += vc->vc_par[j++];
1699 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1700 vc->vc_palette[i] += vc->vc_par[j];
1701 set_palette(vc);
1702 vc->vc_state = ESnormal;
1703 }
1704 } else
1705 vc->vc_state = ESnormal;
1706 return;
1707 case ESsquare:
1708 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1709 vc->vc_par[vc->vc_npar] = 0;
1710 vc->vc_npar = 0;
1711 vc->vc_state = ESgetpars;
1712 if (c == '[') { /* Function key */
1713 vc->vc_state=ESfunckey;
1714 return;
1715 }
1716 vc->vc_ques = (c == '?');
1717 if (vc->vc_ques)
1718 return;
1719 case ESgetpars:
1720 if (c == ';' && vc->vc_npar < NPAR - 1) {
1721 vc->vc_npar++;
1722 return;
1723 } else if (c>='0' && c<='9') {
1724 vc->vc_par[vc->vc_npar] *= 10;
1725 vc->vc_par[vc->vc_npar] += c - '0';
1726 return;
1727 } else
1728 vc->vc_state = ESgotpars;
1729 case ESgotpars:
1730 vc->vc_state = ESnormal;
1731 switch(c) {
1732 case 'h':
1733 set_mode(vc, 1);
1734 return;
1735 case 'l':
1736 set_mode(vc, 0);
1737 return;
1738 case 'c':
1739 if (vc->vc_ques) {
1740 if (vc->vc_par[0])
1741 vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16);
1742 else
1743 vc->vc_cursor_type = CUR_DEFAULT;
1744 return;
1745 }
1746 break;
1747 case 'm':
1748 if (vc->vc_ques) {
1749 clear_selection();
1750 if (vc->vc_par[0])
1751 vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1];
1752 else
1753 vc->vc_complement_mask = vc->vc_s_complement_mask;
1754 return;
1755 }
1756 break;
1757 case 'n':
1758 if (!vc->vc_ques) {
1759 if (vc->vc_par[0] == 5)
1760 status_report(tty);
1761 else if (vc->vc_par[0] == 6)
1762 cursor_report(vc, tty);
1763 }
1764 return;
1765 }
1766 if (vc->vc_ques) {
1767 vc->vc_ques = 0;
1768 return;
1769 }
1770 switch(c) {
1771 case 'G': case '`':
1772 if (vc->vc_par[0])
1773 vc->vc_par[0]--;
1774 gotoxy(vc, vc->vc_par[0], vc->vc_y);
1775 return;
1776 case 'A':
1777 if (!vc->vc_par[0])
1778 vc->vc_par[0]++;
1779 gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]);
1780 return;
1781 case 'B': case 'e':
1782 if (!vc->vc_par[0])
1783 vc->vc_par[0]++;
1784 gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]);
1785 return;
1786 case 'C': case 'a':
1787 if (!vc->vc_par[0])
1788 vc->vc_par[0]++;
1789 gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y);
1790 return;
1791 case 'D':
1792 if (!vc->vc_par[0])
1793 vc->vc_par[0]++;
1794 gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y);
1795 return;
1796 case 'E':
1797 if (!vc->vc_par[0])
1798 vc->vc_par[0]++;
1799 gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]);
1800 return;
1801 case 'F':
1802 if (!vc->vc_par[0])
1803 vc->vc_par[0]++;
1804 gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]);
1805 return;
1806 case 'd':
1807 if (vc->vc_par[0])
1808 vc->vc_par[0]--;
1809 gotoxay(vc, vc->vc_x ,vc->vc_par[0]);
1810 return;
1811 case 'H': case 'f':
1812 if (vc->vc_par[0])
1813 vc->vc_par[0]--;
1814 if (vc->vc_par[1])
1815 vc->vc_par[1]--;
1816 gotoxay(vc, vc->vc_par[1], vc->vc_par[0]);
1817 return;
1818 case 'J':
1819 csi_J(vc, vc->vc_par[0]);
1820 return;
1821 case 'K':
1822 csi_K(vc, vc->vc_par[0]);
1823 return;
1824 case 'L':
1825 csi_L(vc, vc->vc_par[0]);
1826 return;
1827 case 'M':
1828 csi_M(vc, vc->vc_par[0]);
1829 return;
1830 case 'P':
1831 csi_P(vc, vc->vc_par[0]);
1832 return;
1833 case 'c':
1834 if (!vc->vc_par[0])
1835 respond_ID(tty);
1836 return;
1837 case 'g':
1838 if (!vc->vc_par[0])
1839 vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31));
1840 else if (vc->vc_par[0] == 3) {
1841 vc->vc_tab_stop[0] =
1842 vc->vc_tab_stop[1] =
1843 vc->vc_tab_stop[2] =
1844 vc->vc_tab_stop[3] =
1845 vc->vc_tab_stop[4] = 0;
1846 }
1847 return;
1848 case 'm':
1849 csi_m(vc);
1850 return;
1851 case 'q': /* DECLL - but only 3 leds */
1852 /* map 0,1,2,3 to 0,1,2,4 */
1853 if (vc->vc_par[0] < 4)
1854 setledstate(kbd_table + vc->vc_num,
1855 (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4);
1856 return;
1857 case 'r':
1858 if (!vc->vc_par[0])
1859 vc->vc_par[0]++;
1860 if (!vc->vc_par[1])
1861 vc->vc_par[1] = vc->vc_rows;
1862 /* Minimum allowed region is 2 lines */
1863 if (vc->vc_par[0] < vc->vc_par[1] &&
1864 vc->vc_par[1] <= vc->vc_rows) {
1865 vc->vc_top = vc->vc_par[0] - 1;
1866 vc->vc_bottom = vc->vc_par[1];
1867 gotoxay(vc, 0, 0);
1868 }
1869 return;
1870 case 's':
1871 save_cur(vc);
1872 return;
1873 case 'u':
1874 restore_cur(vc);
1875 return;
1876 case 'X':
1877 csi_X(vc, vc->vc_par[0]);
1878 return;
1879 case '@':
1880 csi_at(vc, vc->vc_par[0]);
1881 return;
1882 case ']': /* setterm functions */
1883 setterm_command(vc);
1884 return;
1885 }
1886 return;
1887 case ESpercent:
1888 vc->vc_state = ESnormal;
1889 switch (c) {
1890 case '@': /* defined in ISO 2022 */
1891 vc->vc_utf = 0;
1892 return;
1893 case 'G': /* prelim official escape code */
1894 case '8': /* retained for compatibility */
1895 vc->vc_utf = 1;
1896 return;
1897 }
1898 return;
1899 case ESfunckey:
1900 vc->vc_state = ESnormal;
1901 return;
1902 case EShash:
1903 vc->vc_state = ESnormal;
1904 if (c == '8') {
1905 /* DEC screen alignment test. kludge :-) */
1906 vc->vc_video_erase_char =
1907 (vc->vc_video_erase_char & 0xff00) | 'E';
1908 csi_J(vc, 2);
1909 vc->vc_video_erase_char =
1910 (vc->vc_video_erase_char & 0xff00) | ' ';
1911 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
1912 }
1913 return;
1914 case ESsetG0:
1915 if (c == '0')
1916 vc->vc_G0_charset = GRAF_MAP;
1917 else if (c == 'B')
1918 vc->vc_G0_charset = LAT1_MAP;
1919 else if (c == 'U')
1920 vc->vc_G0_charset = IBMPC_MAP;
1921 else if (c == 'K')
1922 vc->vc_G0_charset = USER_MAP;
1923 if (vc->vc_charset == 0)
1924 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1925 vc->vc_state = ESnormal;
1926 return;
1927 case ESsetG1:
1928 if (c == '0')
1929 vc->vc_G1_charset = GRAF_MAP;
1930 else if (c == 'B')
1931 vc->vc_G1_charset = LAT1_MAP;
1932 else if (c == 'U')
1933 vc->vc_G1_charset = IBMPC_MAP;
1934 else if (c == 'K')
1935 vc->vc_G1_charset = USER_MAP;
1936 if (vc->vc_charset == 1)
1937 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1938 vc->vc_state = ESnormal;
1939 return;
1940 default:
1941 vc->vc_state = ESnormal;
1942 }
1943}
1944
1945/* This is a temporary buffer used to prepare a tty console write
1946 * so that we can easily avoid touching user space while holding the
1947 * console spinlock. It is allocated in con_init and is shared by
1948 * this code and the vc_screen read/write tty calls.
1949 *
1950 * We have to allocate this statically in the kernel data section
1951 * since console_init (and thus con_init) are called before any
1952 * kernel memory allocation is available.
1953 */
1954char con_buf[CON_BUF_SIZE];
c831c338 1955DEFINE_MUTEX(con_buf_mtx);
1da177e4 1956
2f1a2ccb 1957/* is_double_width() is based on the wcwidth() implementation by
1ed8a2b3 1958 * Markus Kuhn -- 2007-05-26 (Unicode 5.0)
2f1a2ccb
EK		 1959 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
1960 */
1961struct interval {
1962 uint32_t first;
1963 uint32_t last;
1964};
1965
1966static int bisearch(uint32_t ucs, const struct interval *table, int max)
1967{
1968 int min = 0;
1969 int mid;
1970
1971 if (ucs < table[0].first || ucs > table[max].last)
1972 return 0;
1973 while (max >= min) {
1974 mid = (min + max) / 2;
1975 if (ucs > table[mid].last)
1976 min = mid + 1;
1977 else if (ucs < table[mid].first)
1978 max = mid - 1;
1979 else
1980 return 1;
1981 }
1982 return 0;
1983}
1984
1985static int is_double_width(uint32_t ucs)
1986{
1987 static const struct interval double_width[] = {
1988 { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E },
1989 { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF },
1ed8a2b3
EK		 1990 { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 },
1991 { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD }
2f1a2ccb 1992 };
0f11541b 1993 return bisearch(ucs, double_width, ARRAY_SIZE(double_width) - 1);
2f1a2ccb
EK		 1994}
1995
1da177e4
LT		 1996/* acquires console_sem */
1997static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count)
1998{
1999#ifdef VT_BUF_VRAM_ONLY
2000#define FLUSH do { } while(0);
2001#else
2002#define FLUSH if (draw_x >= 0) { \
2003 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
2004 draw_x = -1; \
2005 }
2006#endif
2007
2008 int c, tc, ok, n = 0, draw_x = -1;
2009 unsigned int currcons;
2010 unsigned long draw_from = 0, draw_to = 0;
2011 struct vc_data *vc;
2f1a2ccb
EK		 2012 unsigned char vc_attr;
2013 uint8_t rescan;
2014 uint8_t inverse;
2015 uint8_t width;
1da177e4
LT		 2016 u16 himask, charmask;
2017 const unsigned char *orig_buf = NULL;
2018 int orig_count;
2019
2020 if (in_interrupt())
2021 return count;
2022
2023 might_sleep();
2024
2025 acquire_console_sem();
2026 vc = tty->driver_data;
2027 if (vc == NULL) {
2028 printk(KERN_ERR "vt: argh, driver_data is NULL !\n");
2029 release_console_sem();
2030 return 0;
2031 }
2032
2033 currcons = vc->vc_num;
2034 if (!vc_cons_allocated(currcons)) {
2035 /* could this happen? */
2036 static int error = 0;
2037 if (!error) {
2038 error = 1;
2039 printk("con_write: tty %d not allocated\n", currcons+1);
2040 }
2041 release_console_sem();
2042 return 0;
2043 }
2044 release_console_sem();
2045
2046 orig_buf = buf;
2047 orig_count = count;
2048
2049 /* At this point 'buf' is guaranteed to be a kernel buffer
2050 * and therefore no access to userspace (and therefore sleeping)
c831c338 2051 * will be needed. The con_buf_mtx serializes all tty based
1da177e4
LT		 2052 * console rendering and vcs write/read operations. We hold
2053 * the console spinlock during the entire write.
2054 */
2055
2056 acquire_console_sem();
2057
2058 vc = tty->driver_data;
2059 if (vc == NULL) {
2060 printk(KERN_ERR "vt: argh, driver_data _became_ NULL !\n");
2061 release_console_sem();
2062 goto out;
2063 }
2064
2065 himask = vc->vc_hi_font_mask;
2066 charmask = himask ? 0x1ff : 0xff;
2067
2068 /* undraw cursor first */
2069 if (IS_FG(vc))
2070 hide_cursor(vc);
2071
2072 while (!tty->stopped && count) {
2073 int orig = *buf;
2074 c = orig;
2075 buf++;
2076 n++;
2077 count--;
2f1a2ccb
EK		 2078 rescan = 0;
2079 inverse = 0;
2080 width = 1;
1da177e4
LT		 2081
2082 /* Do no translation at all in control states */
2083 if (vc->vc_state != ESnormal) {
2084 tc = c;
d4328b40 2085 } else if (vc->vc_utf && !vc->vc_disp_ctrl) {
2f1a2ccb
EK		 2086 /* Combine UTF-8 into Unicode in vc_utf_char.
2087 * vc_utf_count is the number of continuation bytes still
2088 * expected to arrive.
2089 * vc_npar is the number of continuation bytes arrived so
2090 * far
2091 */
d4328b40 2092rescan_last_byte:
2f1a2ccb
EK		 2093 if ((c & 0xc0) == 0x80) {
2094 /* Continuation byte received */
2095 static const uint32_t utf8_length_changes[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff };
d4328b40 2096 if (vc->vc_utf_count) {
2f1a2ccb
EK		 2097 vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f);
2098 vc->vc_npar++;
2099 if (--vc->vc_utf_count) {
2100 /* Still need some bytes */
1da177e4 2101 continue;
2f1a2ccb
EK		 2102 }
2103 /* Got a whole character */
2104 c = vc->vc_utf_char;
2105 /* Reject overlong sequences */
2106 if (c <= utf8_length_changes[vc->vc_npar - 1] ||
2107 c > utf8_length_changes[vc->vc_npar])
2108 c = 0xfffd;
2109 } else {
2110 /* Unexpected continuation byte */
2111 vc->vc_utf_count = 0;
2112 c = 0xfffd;
2113 }
1da177e4 2114 } else {
2f1a2ccb
EK		 2115 /* Single ASCII byte or first byte of a sequence received */
2116 if (vc->vc_utf_count) {
2117 /* Continuation byte expected */
2118 rescan = 1;
2119 vc->vc_utf_count = 0;
2120 c = 0xfffd;
2121 } else if (c > 0x7f) {
2122 /* First byte of a multibyte sequence received */
2123 vc->vc_npar = 0;
2124 if ((c & 0xe0) == 0xc0) {
2125 vc->vc_utf_count = 1;
2126 vc->vc_utf_char = (c & 0x1f);
2127 } else if ((c & 0xf0) == 0xe0) {
2128 vc->vc_utf_count = 2;
2129 vc->vc_utf_char = (c & 0x0f);
2130 } else if ((c & 0xf8) == 0xf0) {
2131 vc->vc_utf_count = 3;
2132 vc->vc_utf_char = (c & 0x07);
2133 } else if ((c & 0xfc) == 0xf8) {
2134 vc->vc_utf_count = 4;
2135 vc->vc_utf_char = (c & 0x03);
2136 } else if ((c & 0xfe) == 0xfc) {
2137 vc->vc_utf_count = 5;
2138 vc->vc_utf_char = (c & 0x01);
2139 } else {
2140 /* 254 and 255 are invalid */
2141 c = 0xfffd;
2142 }
2143 if (vc->vc_utf_count) {
2144 /* Still need some bytes */
2145 continue;
2146 }
2147 }
2148 /* Nothing to do if an ASCII byte was received */
1da177e4 2149 }
2f1a2ccb
EK		 2150 /* End of UTF-8 decoding. */
2151 /* c is the received character, or U+FFFD for invalid sequences. */
2152 /* Replace invalid Unicode code points with U+FFFD too */
2153 if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff)
2154 c = 0xfffd;
2155 tc = c;
d4328b40 2156 } else { /* no utf or alternate charset mode */
2f1a2ccb 2157 tc = vc->vc_translate[vc->vc_toggle_meta ? (c | 0x80) : c];
1da177e4
LT		 2158 }
2159
2160 /* If the original code was a control character we
2161 * only allow a glyph to be displayed if the code is
2162 * not normally used (such as for cursor movement) or
2163 * if the disp_ctrl mode has been explicitly enabled.
2164 * Certain characters (as given by the CTRL_ALWAYS
2165 * bitmap) are always displayed as control characters,
2166 * as the console would be pretty useless without
2167 * them; to display an arbitrary font position use the
2168 * direct-to-font zone in UTF-8 mode.
2169 */
2170 ok = tc && (c >= 32 ||
d4328b40
AT		 2171 !(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 :
2172 vc->vc_utf || ((CTRL_ACTION >> c) & 1)))
1da177e4
LT		 2173 && (c != 127 || vc->vc_disp_ctrl)
2174 && (c != 128+27);
2175
2176 if (vc->vc_state == ESnormal && ok) {
2f1a2ccb
EK		 2177 if (vc->vc_utf && !vc->vc_disp_ctrl) {
2178 if (is_double_width(c))
2179 width = 2;
2180 }
1da177e4
LT		 2181 /* Now try to find out how to display it */
2182 tc = conv_uni_to_pc(vc, tc);
d4328b40 2183 if (tc & ~charmask) {
2f1a2ccb
EK		 2184 if (tc == -1 || tc == -2) {
2185 continue; /* nothing to display */
2186 }
2187 /* Glyph not found */
1ed8a2b3 2188 if ((!(vc->vc_utf && !vc->vc_disp_ctrl) || c < 128) && !(c & ~charmask)) {
2f1a2ccb 2189 /* In legacy mode use the glyph we get by a 1:1 mapping.
1ed8a2b3
EK		 2190 This would make absolutely no sense with Unicode in mind,
2191 but do this for ASCII characters since a font may lack
2192 Unicode mapping info and we don't want to end up with
2193 having question marks only. */
2f1a2ccb
EK		 2194 tc = c;
2195 } else {
2196 /* Display U+FFFD. If it's not found, display an inverse question mark. */
2197 tc = conv_uni_to_pc(vc, 0xfffd);
2198 if (tc < 0) {
2199 inverse = 1;
2200 tc = conv_uni_to_pc(vc, '?');
2201 if (tc < 0) tc = '?';
2202 }
2203 }
d4328b40 2204 }
1da177e4 2205
2f1a2ccb
EK		 2206 if (!inverse) {
2207 vc_attr = vc->vc_attr;
1da177e4 2208 } else {
2f1a2ccb
EK		 2209 /* invert vc_attr */
2210 if (!vc->vc_can_do_color) {
2211 vc_attr = (vc->vc_attr) ^ 0x08;
2212 } else if (vc->vc_hi_font_mask == 0x100) {
2213 vc_attr = ((vc->vc_attr) & 0x11) | (((vc->vc_attr) & 0xe0) >> 4) | (((vc->vc_attr) & 0x0e) << 4);
2214 } else {
2215 vc_attr = ((vc->vc_attr) & 0x88) | (((vc->vc_attr) & 0x70) >> 4) | (((vc->vc_attr) & 0x07) << 4);
2216 }
1ed8a2b3 2217 FLUSH
1da177e4 2218 }
2f1a2ccb
EK		 2219
2220 while (1) {
2221 if (vc->vc_need_wrap || vc->vc_decim)
2222 FLUSH
2223 if (vc->vc_need_wrap) {
2224 cr(vc);
2225 lf(vc);
2226 }
2227 if (vc->vc_decim)
2228 insert_char(vc, 1);
2229 scr_writew(himask ?
2230 ((vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) :
2231 (vc_attr << 8) + tc,
2232 (u16 *) vc->vc_pos);
2233 if (DO_UPDATE(vc) && draw_x < 0) {
2234 draw_x = vc->vc_x;
2235 draw_from = vc->vc_pos;
2236 }
2237 if (vc->vc_x == vc->vc_cols - 1) {
2238 vc->vc_need_wrap = vc->vc_decawm;
2239 draw_to = vc->vc_pos + 2;
2240 } else {
2241 vc->vc_x++;
2242 draw_to = (vc->vc_pos += 2);
d4328b40 2243 }
2f1a2ccb
EK		 2244
2245 if (!--width) break;
2246
2247 tc = conv_uni_to_pc(vc, ' '); /* A space is printed in the second column */
2248 if (tc < 0) tc = ' ';
2249 }
2250
1ed8a2b3
EK		 2251 if (inverse) {
2252 FLUSH
2253 }
2254
2f1a2ccb
EK		 2255 if (rescan) {
2256 rescan = 0;
2257 inverse = 0;
2258 width = 1;
d4328b40
AT		 2259 c = orig;
2260 goto rescan_last_byte;
2261 }
1da177e4
LT		 2262 continue;
2263 }
2264 FLUSH
2265 do_con_trol(tty, vc, orig);
2266 }
2267 FLUSH
2268 console_conditional_schedule();
2269 release_console_sem();
2270
2271out:
2272 return n;
2273#undef FLUSH
2274}
2275
2276/*
2277 * This is the console switching callback.
2278 *
2279 * Doing console switching in a process context allows
2280 * us to do the switches asynchronously (needed when we want
2281 * to switch due to a keyboard interrupt). Synchronization
2282 * with other console code and prevention of re-entrancy is
2283 * ensured with console_sem.
2284 */
65f27f38 2285static void console_callback(struct work_struct *ignored)
1da177e4
LT		 2286{
2287 acquire_console_sem();
2288
2289 if (want_console >= 0) {
2290 if (want_console != fg_console &&
2291 vc_cons_allocated(want_console)) {
2292 hide_cursor(vc_cons[fg_console].d);
2293 change_console(vc_cons[want_console].d);
2294 /* we only changed when the console had already
2295 been allocated - a new console is not created
2296 in an interrupt routine */
2297 }
2298 want_console = -1;
2299 }
2300 if (do_poke_blanked_console) { /* do not unblank for a LED change */
2301 do_poke_blanked_console = 0;
2302 poke_blanked_console();
2303 }
2304 if (scrollback_delta) {
2305 struct vc_data *vc = vc_cons[fg_console].d;
2306 clear_selection();
2307 if (vc->vc_mode == KD_TEXT)
2308 vc->vc_sw->con_scrolldelta(vc, scrollback_delta);
2309 scrollback_delta = 0;
2310 }
2311 if (blank_timer_expired) {
2312 do_blank_screen(0);
2313 blank_timer_expired = 0;
2314 }
2315
2316 release_console_sem();
2317}
2318
b257bc05 2319int set_console(int nr)
1da177e4 2320{
b257bc05
AJ		 2321 struct vc_data *vc = vc_cons[fg_console].d;
2322
2323 if (!vc_cons_allocated(nr) || vt_dont_switch ||
2324 (vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) {
2325
2326 /*
2327 * Console switch will fail in console_callback() or
2328 * change_console() so there is no point scheduling
2329 * the callback
2330 *
2331 * Existing set_console() users don't check the return
2332 * value so this shouldn't break anything
2333 */
2334 return -EINVAL;
2335 }
2336
1da177e4
LT		 2337 want_console = nr;
2338 schedule_console_callback();
b257bc05
AJ		 2339
2340 return 0;
1da177e4
LT		 2341}
2342
2343struct tty_driver *console_driver;
2344
2345#ifdef CONFIG_VT_CONSOLE
2346
2347/*
2348 * Console on virtual terminal
2349 *
2350 * The console must be locked when we get here.
2351 */
2352
2353static void vt_console_print(struct console *co, const char *b, unsigned count)
2354{
2355 struct vc_data *vc = vc_cons[fg_console].d;
2356 unsigned char c;
2357 static unsigned long printing;
2358 const ushort *start;
2359 ushort cnt = 0;
2360 ushort myx;
2361
2362 /* console busy or not yet initialized */
2363 if (!printable || test_and_set_bit(0, &printing))
2364 return;
2365
2366 if (kmsg_redirect && vc_cons_allocated(kmsg_redirect - 1))
2367 vc = vc_cons[kmsg_redirect - 1].d;
2368
2369 /* read `x' only after setting currcons properly (otherwise
2370 the `x' macro will read the x of the foreground console). */
2371 myx = vc->vc_x;
2372
2373 if (!vc_cons_allocated(fg_console)) {
2374 /* impossible */
2375 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2376 goto quit;
2377 }
2378
2379 if (vc->vc_mode != KD_TEXT)
2380 goto quit;
2381
2382 /* undraw cursor first */
2383 if (IS_FG(vc))
2384 hide_cursor(vc);
2385
2386 start = (ushort *)vc->vc_pos;
2387
2388 /* Contrived structure to try to emulate original need_wrap behaviour
2389 * Problems caused when we have need_wrap set on '\n' character */
2390 while (count--) {
2391 c = *b++;
2392 if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) {
2393 if (cnt > 0) {
2394 if (CON_IS_VISIBLE(vc))
2395 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2396 vc->vc_x += cnt;
2397 if (vc->vc_need_wrap)
2398 vc->vc_x--;
2399 cnt = 0;
2400 }
2401 if (c == 8) { /* backspace */
2402 bs(vc);
2403 start = (ushort *)vc->vc_pos;
2404 myx = vc->vc_x;
2405 continue;
2406 }
2407 if (c != 13)
2408 lf(vc);
2409 cr(vc);
2410 start = (ushort *)vc->vc_pos;
2411 myx = vc->vc_x;
2412 if (c == 10 || c == 13)
2413 continue;
2414 }
2415 scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos);
2416 cnt++;
2417 if (myx == vc->vc_cols - 1) {
2418 vc->vc_need_wrap = 1;
2419 continue;
2420 }
2421 vc->vc_pos += 2;
2422 myx++;
2423 }
2424 if (cnt > 0) {
2425 if (CON_IS_VISIBLE(vc))
2426 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2427 vc->vc_x += cnt;
2428 if (vc->vc_x == vc->vc_cols) {
2429 vc->vc_x--;
2430 vc->vc_need_wrap = 1;
2431 }
2432 }
2433 set_cursor(vc);
2434
2435quit:
2436 clear_bit(0, &printing);
2437}
2438
2439static struct tty_driver *vt_console_device(struct console *c, int *index)
2440{
2441 *index = c->index ? c->index-1 : fg_console;
2442 return console_driver;
2443}
2444
2445static struct console vt_console_driver = {
2446 .name = "tty",
2447 .write = vt_console_print,
2448 .device = vt_console_device,
2449 .unblank = unblank_screen,
2450 .flags = CON_PRINTBUFFER,
2451 .index = -1,
2452};
2453#endif
2454
2455/*
2456 * Handling of Linux-specific VC ioctls
2457 */
2458
2459/*
2460 * Generally a bit racy with respect to console_sem().
2461 *
2462 * There are some functions which don't need it.
2463 *
2464 * There are some functions which can sleep for arbitrary periods
2465 * (paste_selection) but we don't need the lock there anyway.
2466 *
2467 * set_selection has locking, and definitely needs it
2468 */
2469
2470int tioclinux(struct tty_struct *tty, unsigned long arg)
2471{
2472 char type, data;
2473 char __user *p = (char __user *)arg;
2474 int lines;
2475 int ret;
2476
2477 if (tty->driver->type != TTY_DRIVER_TYPE_CONSOLE)
2478 return -EINVAL;
2479 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN))
2480 return -EPERM;
2481 if (get_user(type, p))
2482 return -EFAULT;
2483 ret = 0;
2484 switch (type)
2485 {
2486 case TIOCL_SETSEL:
2487 acquire_console_sem();
2488 ret = set_selection((struct tiocl_selection __user *)(p+1), tty);
2489 release_console_sem();
2490 break;
2491 case TIOCL_PASTESEL:
2492 ret = paste_selection(tty);
2493 break;
2494 case TIOCL_UNBLANKSCREEN:
2d237c63 2495 acquire_console_sem();
1da177e4 2496 unblank_screen();
2d237c63 2497 release_console_sem();
1da177e4
LT		 2498 break;
2499 case TIOCL_SELLOADLUT:
2500 ret = sel_loadlut(p);
2501 break;
2502 case TIOCL_GETSHIFTSTATE:
2503
2504 /*
2505 * Make it possible to react to Shift+Mousebutton.
2506 * Note that 'shift_state' is an undocumented
2507 * kernel-internal variable; programs not closely
2508 * related to the kernel should not use this.
2509 */
2510 data = shift_state;
2511 ret = __put_user(data, p);
2512 break;
2513 case TIOCL_GETMOUSEREPORTING:
2514 data = mouse_reporting();
2515 ret = __put_user(data, p);
2516 break;
2517 case TIOCL_SETVESABLANK:
403aac96 2518 ret = set_vesa_blanking(p);
1da177e4 2519 break;
0ca07731
RW		 2520 case TIOCL_GETKMSGREDIRECT:
2521 data = kmsg_redirect;
2522 ret = __put_user(data, p);
2523 break;
1da177e4
LT		 2524 case TIOCL_SETKMSGREDIRECT:
2525 if (!capable(CAP_SYS_ADMIN)) {
2526 ret = -EPERM;
2527 } else {
2528 if (get_user(data, p+1))
2529 ret = -EFAULT;
2530 else
2531 kmsg_redirect = data;
2532 }
2533 break;
2534 case TIOCL_GETFGCONSOLE:
2535 ret = fg_console;
2536 break;
2537 case TIOCL_SCROLLCONSOLE:
2538 if (get_user(lines, (s32 __user *)(p+4))) {
2539 ret = -EFAULT;
2540 } else {
2541 scrollfront(vc_cons[fg_console].d, lines);
2542 ret = 0;
2543 }
2544 break;
2545 case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
2d237c63 2546 acquire_console_sem();
1da177e4
LT		 2547 ignore_poke = 1;
2548 do_blank_screen(0);
2d237c63 2549 release_console_sem();
1da177e4
LT		 2550 break;
2551 case TIOCL_BLANKEDSCREEN:
2552 ret = console_blanked;
2553 break;
2554 default:
2555 ret = -EINVAL;
2556 break;
2557 }
2558 return ret;
2559}
2560
2561/*
2562 * /dev/ttyN handling
2563 */
2564
2565static int con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2566{
2567 int retval;
2568
2569 retval = do_con_write(tty, buf, count);
2570 con_flush_chars(tty);
2571
2572 return retval;
2573}
2574
2575static void con_put_char(struct tty_struct *tty, unsigned char ch)
2576{
2577 if (in_interrupt())
2578 return; /* n_r3964 calls put_char() from interrupt context */
2579 do_con_write(tty, &ch, 1);
2580}
2581
2582static int con_write_room(struct tty_struct *tty)
2583{
2584 if (tty->stopped)
2585 return 0;
2586 return 4096; /* No limit, really; we're not buffering */
2587}
2588
2589static int con_chars_in_buffer(struct tty_struct *tty)
2590{
2591 return 0; /* we're not buffering */
2592}
2593
2594/*
2595 * con_throttle and con_unthrottle are only used for
2596 * paste_selection(), which has to stuff in a large number of
2597 * characters...
2598 */
2599static void con_throttle(struct tty_struct *tty)
2600{
2601}
2602
2603static void con_unthrottle(struct tty_struct *tty)
2604{
2605 struct vc_data *vc = tty->driver_data;
2606
2607 wake_up_interruptible(&vc->paste_wait);
2608}
2609
2610/*
2611 * Turn the Scroll-Lock LED on when the tty is stopped
2612 */
2613static void con_stop(struct tty_struct *tty)
2614{
2615 int console_num;
2616 if (!tty)
2617 return;
2618 console_num = tty->index;
2619 if (!vc_cons_allocated(console_num))
2620 return;
2621 set_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2622 set_leds();
2623}
2624
2625/*
2626 * Turn the Scroll-Lock LED off when the console is started
2627 */
2628static void con_start(struct tty_struct *tty)
2629{
2630 int console_num;
2631 if (!tty)
2632 return;
2633 console_num = tty->index;
2634 if (!vc_cons_allocated(console_num))
2635 return;
2636 clr_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2637 set_leds();
2638}
2639
2640static void con_flush_chars(struct tty_struct *tty)
2641{
2642 struct vc_data *vc;
2643
2644 if (in_interrupt()) /* from flush_to_ldisc */
2645 return;
2646
2647 /* if we race with con_close(), vt may be null */
2648 acquire_console_sem();
2649 vc = tty->driver_data;
2650 if (vc)
2651 set_cursor(vc);
2652 release_console_sem();
2653}
2654
2655/*
2656 * Allocate the console screen memory.
2657 */
2658static int con_open(struct tty_struct *tty, struct file *filp)
2659{
2660 unsigned int currcons = tty->index;
2661 int ret = 0;
2662
2663 acquire_console_sem();
f786648b 2664 if (tty->driver_data == NULL) {
1da177e4
LT		 2665 ret = vc_allocate(currcons);
2666 if (ret == 0) {
2667 struct vc_data *vc = vc_cons[currcons].d;
2668 tty->driver_data = vc;
2669 vc->vc_tty = tty;
2670
2671 if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
2672 tty->winsize.ws_row = vc_cons[currcons].d->vc_rows;
2673 tty->winsize.ws_col = vc_cons[currcons].d->vc_cols;
2674 }
2675 release_console_sem();
d09d7ddf 2676 vcs_make_sysfs(tty);
1da177e4
LT		 2677 return ret;
2678 }
2679 }
2680 release_console_sem();
2681 return ret;
2682}
2683
2684/*
70522e12 2685 * We take tty_mutex in here to prevent another thread from coming in via init_dev
1da177e4
LT		 2686 * and taking a ref against the tty while we're in the process of forgetting
2687 * about it and cleaning things up.
2688 *
d09d7ddf 2689 * This is because vcs_remove_sysfs() can sleep and will drop the BKL.
1da177e4
LT		 2690 */
2691static void con_close(struct tty_struct *tty, struct file *filp)
2692{
70522e12 2693 mutex_lock(&tty_mutex);
1da177e4
LT		 2694 acquire_console_sem();
2695 if (tty && tty->count == 1) {
2696 struct vc_data *vc = tty->driver_data;
2697
2698 if (vc)
2699 vc->vc_tty = NULL;
2700 tty->driver_data = NULL;
2701 release_console_sem();
d09d7ddf 2702 vcs_remove_sysfs(tty);
70522e12 2703 mutex_unlock(&tty_mutex);
1da177e4 2704 /*
70522e12 2705 * tty_mutex is released, but we still hold BKL, so there is
1da177e4
LT		 2706 * still exclusion against init_dev()
2707 */
2708 return;
2709 }
2710 release_console_sem();
70522e12 2711 mutex_unlock(&tty_mutex);
1da177e4
LT		 2712}
2713
fa6ce9ab
JE		 2714static int default_italic_color = 2; // green (ASCII)
2715static int default_underline_color = 3; // cyan (ASCII)
2716module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR);
2717module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR);
2718
1da177e4
LT		 2719static void vc_init(struct vc_data *vc, unsigned int rows,
2720 unsigned int cols, int do_clear)
2721{
2722 int j, k ;
2723
2724 vc->vc_cols = cols;
2725 vc->vc_rows = rows;
2726 vc->vc_size_row = cols << 1;
2727 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
2728
2729 set_origin(vc);
2730 vc->vc_pos = vc->vc_origin;
2731 reset_vc(vc);
2732 for (j=k=0; j<16; j++) {
2733 vc->vc_palette[k++] = default_red[j] ;
2734 vc->vc_palette[k++] = default_grn[j] ;
2735 vc->vc_palette[k++] = default_blu[j] ;
2736 }
2737 vc->vc_def_color = 0x07; /* white */
fa6ce9ab
JE		 2738 vc->vc_ulcolor = default_underline_color;
2739 vc->vc_itcolor = default_italic_color;
1da177e4
LT		 2740 vc->vc_halfcolor = 0x08; /* grey */
2741 init_waitqueue_head(&vc->paste_wait);
2742 reset_terminal(vc, do_clear);
2743}
2744
2745/*
2746 * This routine initializes console interrupts, and does nothing
2747 * else. If you want the screen to clear, call tty_write with
2748 * the appropriate escape-sequence.
2749 */
2750
2751static int __init con_init(void)
2752{
2753 const char *display_desc = NULL;
2754 struct vc_data *vc;
3e795de7 2755 unsigned int currcons = 0, i;
1da177e4
LT		 2756
2757 acquire_console_sem();
2758
2759 if (conswitchp)
2760 display_desc = conswitchp->con_startup();
2761 if (!display_desc) {
2762 fg_console = 0;
2763 release_console_sem();
2764 return 0;
2765 }
2766
3e795de7
AD		 2767 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2768 struct con_driver *con_driver = &registered_con_driver[i];
2769
2770 if (con_driver->con == NULL) {
2771 con_driver->con = conswitchp;
2772 con_driver->desc = display_desc;
2773 con_driver->flag = CON_DRIVER_FLAG_INIT;
2774 con_driver->first = 0;
2775 con_driver->last = MAX_NR_CONSOLES - 1;
2776 break;
2777 }
2778 }
2779
2780 for (i = 0; i < MAX_NR_CONSOLES; i++)
2781 con_driver_map[i] = conswitchp;
2782
1da177e4
LT		 2783 if (blankinterval) {
2784 blank_state = blank_normal_wait;
2785 mod_timer(&console_timer, jiffies + blankinterval);
2786 }
2787
2788 /*
2789 * kmalloc is not running yet - we use the bootmem allocator.
2790 */
2791 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) {
2792 vc_cons[currcons].d = vc = alloc_bootmem(sizeof(struct vc_data));
7f1f86a0 2793 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
1da177e4
LT		 2794 visual_init(vc, currcons, 1);
2795 vc->vc_screenbuf = (unsigned short *)alloc_bootmem(vc->vc_screenbuf_size);
2796 vc->vc_kmalloced = 0;
2797 vc_init(vc, vc->vc_rows, vc->vc_cols,
2798 currcons || !vc->vc_sw->con_save_screen);
2799 }
2800 currcons = fg_console = 0;
2801 master_display_fg = vc = vc_cons[currcons].d;
2802 set_origin(vc);
2803 save_screen(vc);
2804 gotoxy(vc, vc->vc_x, vc->vc_y);
2805 csi_J(vc, 0);
2806 update_screen(vc);
2807 printk("Console: %s %s %dx%d",
2808 vc->vc_can_do_color ? "colour" : "mono",
2809 display_desc, vc->vc_cols, vc->vc_rows);
2810 printable = 1;
2811 printk("\n");
2812
2813 release_console_sem();
2814
2815#ifdef CONFIG_VT_CONSOLE
2816 register_console(&vt_console_driver);
2817#endif
2818 return 0;
2819}
2820console_initcall(con_init);
2821
b68e31d0 2822static const struct tty_operations con_ops = {
1da177e4
LT		 2823 .open = con_open,
2824 .close = con_close,
2825 .write = con_write,
2826 .write_room = con_write_room,
2827 .put_char = con_put_char,
2828 .flush_chars = con_flush_chars,
2829 .chars_in_buffer = con_chars_in_buffer,
2830 .ioctl = vt_ioctl,
2831 .stop = con_stop,
2832 .start = con_start,
2833 .throttle = con_throttle,
2834 .unthrottle = con_unthrottle,
2835};
2836
2837int __init vty_init(void)
2838{
2839 vcs_init();
2840
2841 console_driver = alloc_tty_driver(MAX_NR_CONSOLES);
2842 if (!console_driver)
2843 panic("Couldn't allocate console driver\n");
2844 console_driver->owner = THIS_MODULE;
1da177e4
LT		 2845 console_driver->name = "tty";
2846 console_driver->name_base = 1;
2847 console_driver->major = TTY_MAJOR;
2848 console_driver->minor_start = 1;
2849 console_driver->type = TTY_DRIVER_TYPE_CONSOLE;
2850 console_driver->init_termios = tty_std_termios;
2851 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS;
2852 tty_set_operations(console_driver, &con_ops);
2853 if (tty_register_driver(console_driver))
2854 panic("Couldn't register console driver\n");
2855
2856 kbd_init();
2857 console_map_init();
2858#ifdef CONFIG_PROM_CONSOLE
2859 prom_con_init();
2860#endif
2861#ifdef CONFIG_MDA_CONSOLE
2862 mda_console_init();
2863#endif
2864 return 0;
2865}
2866
2867#ifndef VT_SINGLE_DRIVER
6db4063c
AD		 2868#include <linux/device.h>
2869
2870static struct class *vtconsole_class;
2871
623e71b0 2872int bind_con_driver(const struct consw *csw, int first, int last, int deflt)
1da177e4 2873{
3e795de7
AD		 2874 struct module *owner = csw->owner;
2875 const char *desc = NULL;
2876 struct con_driver *con_driver;
2877 int i, j = -1, k = -1, retval = -ENODEV;
1da177e4 2878
1da177e4
LT		 2879 if (!try_module_get(owner))
2880 return -ENODEV;
2881
1c8ce271 2882 acquire_console_sem();
1c8ce271 2883
3e795de7
AD		 2884 /* check if driver is registered */
2885 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2886 con_driver = &registered_con_driver[i];
2887
2888 if (con_driver->con == csw) {
2889 desc = con_driver->desc;
2890 retval = 0;
2891 break;
2892 }
2893 }
2894
2895 if (retval)
2896 goto err;
2897
2898 if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) {
2899 csw->con_startup();
2900 con_driver->flag |= CON_DRIVER_FLAG_INIT;
1da177e4 2901 }
1c8ce271 2902
1da177e4
LT		 2903 if (deflt) {
2904 if (conswitchp)
2905 module_put(conswitchp->owner);
1c8ce271 2906
1da177e4
LT		 2907 __module_get(owner);
2908 conswitchp = csw;
2909 }
2910
3e795de7
AD		 2911 first = max(first, con_driver->first);
2912 last = min(last, con_driver->last);
2913
1da177e4
LT		 2914 for (i = first; i <= last; i++) {
2915 int old_was_color;
2916 struct vc_data *vc = vc_cons[i].d;
2917
2918 if (con_driver_map[i])
2919 module_put(con_driver_map[i]->owner);
2920 __module_get(owner);
2921 con_driver_map[i] = csw;
2922
2923 if (!vc || !vc->vc_sw)
2924 continue;
2925
2926 j = i;
1c8ce271 2927
4ee1acce
DH		 2928 if (CON_IS_VISIBLE(vc)) {
2929 k = i;
1da177e4 2930 save_screen(vc);
4ee1acce
DH		 2931 }
2932
1da177e4
LT		 2933 old_was_color = vc->vc_can_do_color;
2934 vc->vc_sw->con_deinit(vc);
2935 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
1da177e4 2936 visual_init(vc, i, 0);
1c8ce271 2937 set_origin(vc);
1da177e4
LT		 2938 update_attr(vc);
2939
2940 /* If the console changed between mono <-> color, then
2941 * the attributes in the screenbuf will be wrong. The
2942 * following resets all attributes to something sane.
2943 */
2944 if (old_was_color != vc->vc_can_do_color)
2945 clear_buffer_attributes(vc);
1da177e4 2946 }
4ee1acce 2947
1da177e4
LT		 2948 printk("Console: switching ");
2949 if (!deflt)
2950 printk("consoles %d-%d ", first+1, last+1);
4ee1acce
DH		 2951 if (j >= 0) {
2952 struct vc_data *vc = vc_cons[j].d;
2953
1da177e4 2954 printk("to %s %s %dx%d\n",
4ee1acce
DH		 2955 vc->vc_can_do_color ? "colour" : "mono",
2956 desc, vc->vc_cols, vc->vc_rows);
2957
2958 if (k >= 0) {
2959 vc = vc_cons[k].d;
2960 update_screen(vc);
2961 }
2962 } else
1da177e4
LT		 2963 printk("to %s\n", desc);
2964
3e795de7
AD		 2965 retval = 0;
2966err:
1da177e4 2967 release_console_sem();
1da177e4 2968 module_put(owner);
3e795de7
AD		 2969 return retval;
2970};
623e71b0 2971EXPORT_SYMBOL(bind_con_driver);
1da177e4 2972
13ae6645
AD		 2973#ifdef CONFIG_VT_HW_CONSOLE_BINDING
2974static int con_is_graphics(const struct consw *csw, int first, int last)
2975{
2976 int i, retval = 0;
2977
2978 for (i = first; i <= last; i++) {
2979 struct vc_data *vc = vc_cons[i].d;
2980
2981 if (vc && vc->vc_mode == KD_GRAPHICS) {
2982 retval = 1;
2983 break;
2984 }
2985 }
2986
2987 return retval;
2988}
2989
623e71b0 2990int unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
1da177e4 2991{
3e795de7
AD		 2992 struct module *owner = csw->owner;
2993 const struct consw *defcsw = NULL;
2994 struct con_driver *con_driver = NULL, *con_back = NULL;
2995 int i, retval = -ENODEV;
1da177e4 2996
3e795de7
AD		 2997 if (!try_module_get(owner))
2998 return -ENODEV;
2999
3000 acquire_console_sem();
3001
3002 /* check if driver is registered and if it is unbindable */
3003 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3004 con_driver = &registered_con_driver[i];
3005
3006 if (con_driver->con == csw &&
6db4063c 3007 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3e795de7
AD		 3008 retval = 0;
3009 break;
3010 }
3011 }
3012
3013 if (retval) {
3014 release_console_sem();
3015 goto err;
3016 }
3017
6db4063c
AD		 3018 retval = -ENODEV;
3019
3e795de7
AD		 3020 /* check if backup driver exists */
3021 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3022 con_back = &registered_con_driver[i];
3023
3024 if (con_back->con &&
6db4063c 3025 !(con_back->flag & CON_DRIVER_FLAG_MODULE)) {
3e795de7
AD		 3026 defcsw = con_back->con;
3027 retval = 0;
3028 break;
3029 }
3030 }
3031
3032 if (retval) {
3033 release_console_sem();
3034 goto err;
3035 }
3036
3037 if (!con_is_bound(csw)) {
3038 release_console_sem();
3039 goto err;
3040 }
3041
3042 first = max(first, con_driver->first);
3043 last = min(last, con_driver->last);
3044
3045 for (i = first; i <= last; i++) {
1da177e4
LT		 3046 if (con_driver_map[i] == csw) {
3047 module_put(csw->owner);
3048 con_driver_map[i] = NULL;
3049 }
3e795de7
AD		 3050 }
3051
3052 if (!con_is_bound(defcsw)) {
6db4063c
AD		 3053 const struct consw *defconsw = conswitchp;
3054
3e795de7
AD		 3055 defcsw->con_startup();
3056 con_back->flag |= CON_DRIVER_FLAG_INIT;
6db4063c
AD		 3057 /*
3058 * vgacon may change the default driver to point
3059 * to dummycon, we restore it here...
3060 */
3061 conswitchp = defconsw;
3e795de7
AD		 3062 }
3063
3064 if (!con_is_bound(csw))
3065 con_driver->flag &= ~CON_DRIVER_FLAG_INIT;
3066
3067 release_console_sem();
6db4063c
AD		 3068 /* ignore return value, binding should not fail */
3069 bind_con_driver(defcsw, first, last, deflt);
3e795de7
AD		 3070err:
3071 module_put(owner);
3072 return retval;
3073
3074}
623e71b0 3075EXPORT_SYMBOL(unbind_con_driver);
3e795de7 3076
6db4063c
AD		 3077static int vt_bind(struct con_driver *con)
3078{
3079 const struct consw *defcsw = NULL, *csw = NULL;
3080 int i, more = 1, first = -1, last = -1, deflt = 0;
3081
3082 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3083 con_is_graphics(con->con, con->first, con->last))
3084 goto err;
3085
3086 csw = con->con;
3087
3088 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3089 struct con_driver *con = &registered_con_driver[i];
3090
3091 if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) {
3092 defcsw = con->con;
3093 break;
3094 }
3095 }
3096
3097 if (!defcsw)
3098 goto err;
3099
3100 while (more) {
3101 more = 0;
3102
3103 for (i = con->first; i <= con->last; i++) {
3104 if (con_driver_map[i] == defcsw) {
3105 if (first == -1)
3106 first = i;
3107 last = i;
3108 more = 1;
3109 } else if (first != -1)
3110 break;
3111 }
3112
3113 if (first == 0 && last == MAX_NR_CONSOLES -1)
3114 deflt = 1;
3115
3116 if (first != -1)
3117 bind_con_driver(csw, first, last, deflt);
3118
3119 first = -1;
3120 last = -1;
3121 deflt = 0;
3122 }
3123
3124err:
3125 return 0;
3126}
3127
3128static int vt_unbind(struct con_driver *con)
3129{
3130 const struct consw *csw = NULL;
3131 int i, more = 1, first = -1, last = -1, deflt = 0;
3132
3133 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3134 con_is_graphics(con->con, con->first, con->last))
3135 goto err;
3136
3137 csw = con->con;
3138
3139 while (more) {
3140 more = 0;
3141
3142 for (i = con->first; i <= con->last; i++) {
3143 if (con_driver_map[i] == csw) {
3144 if (first == -1)
3145 first = i;
3146 last = i;
3147 more = 1;
3148 } else if (first != -1)
3149 break;
3150 }
3151
3152 if (first == 0 && last == MAX_NR_CONSOLES -1)
3153 deflt = 1;
3154
3155 if (first != -1)
3156 unbind_con_driver(csw, first, last, deflt);
3157
3158 first = -1;
3159 last = -1;
3160 deflt = 0;
3161 }
3162
3163err:
3164 return 0;
3165}
13ae6645
AD		 3166#else
3167static inline int vt_bind(struct con_driver *con)
3168{
3169 return 0;
3170}
3171static inline int vt_unbind(struct con_driver *con)
3172{
3173 return 0;
3174}
3175#endif /* CONFIG_VT_HW_CONSOLE_BINDING */
6db4063c 3176
805952a8 3177static ssize_t store_bind(struct device *dev, struct device_attribute *attr,
6db4063c
AD		 3178 const char *buf, size_t count)
3179{
805952a8 3180 struct con_driver *con = dev_get_drvdata(dev);
6db4063c
AD		 3181 int bind = simple_strtoul(buf, NULL, 0);
3182
3183 if (bind)
3184 vt_bind(con);
3185 else
3186 vt_unbind(con);
3187
3188 return count;
3189}
3190
805952a8
GKH		 3191static ssize_t show_bind(struct device *dev, struct device_attribute *attr,
3192 char *buf)
6db4063c 3193{
805952a8 3194 struct con_driver *con = dev_get_drvdata(dev);
6db4063c
AD		 3195 int bind = con_is_bound(con->con);
3196
3197 return snprintf(buf, PAGE_SIZE, "%i\n", bind);
3198}
3199
805952a8
GKH		 3200static ssize_t show_name(struct device *dev, struct device_attribute *attr,
3201 char *buf)
6db4063c 3202{
805952a8 3203 struct con_driver *con = dev_get_drvdata(dev);
6db4063c
AD		 3204
3205 return snprintf(buf, PAGE_SIZE, "%s %s\n",
3206 (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)",
3207 con->desc);
3208
3209}
3210
805952a8 3211static struct device_attribute device_attrs[] = {
6db4063c
AD		 3212 __ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind),
3213 __ATTR(name, S_IRUGO, show_name, NULL),
3214};
3215
805952a8 3216static int vtconsole_init_device(struct con_driver *con)
6db4063c
AD		 3217{
3218 int i;
928e964f 3219 int error = 0;
6db4063c 3220
928e964f 3221 con->flag |= CON_DRIVER_FLAG_ATTR;
805952a8
GKH		 3222 dev_set_drvdata(con->dev, con);
3223 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3224 error = device_create_file(con->dev, &device_attrs[i]);
928e964f
AD		 3225 if (error)
3226 break;
3227 }
6db4063c 3228
928e964f
AD		 3229 if (error) {
3230 while (--i >= 0)
805952a8 3231 device_remove_file(con->dev, &device_attrs[i]);
928e964f
AD		 3232 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3233 }
3234
3235 return error;
6db4063c
AD		 3236}
3237
805952a8 3238static void vtconsole_deinit_device(struct con_driver *con)
6db4063c
AD		 3239{
3240 int i;
3241
928e964f 3242 if (con->flag & CON_DRIVER_FLAG_ATTR) {
805952a8
GKH		 3243 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3244 device_remove_file(con->dev, &device_attrs[i]);
928e964f
AD		 3245 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3246 }
6db4063c
AD		 3247}
3248
3e795de7
AD		 3249/**
3250 * con_is_bound - checks if driver is bound to the console
3251 * @csw: console driver
3252 *
3253 * RETURNS: zero if unbound, nonzero if bound
3254 *
3255 * Drivers can call this and if zero, they should release
3256 * all resources allocated on con_startup()
3257 */
3258int con_is_bound(const struct consw *csw)
3259{
3260 int i, bound = 0;
3261
3262 for (i = 0; i < MAX_NR_CONSOLES; i++) {
3263 if (con_driver_map[i] == csw) {
3264 bound = 1;
3265 break;
3266 }
3267 }
3268
3269 return bound;
3270}
3271EXPORT_SYMBOL(con_is_bound);
3272
3273/**
3274 * register_con_driver - register console driver to console layer
3275 * @csw: console driver
3276 * @first: the first console to take over, minimum value is 0
3277 * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1
3278 *
3279 * DESCRIPTION: This function registers a console driver which can later
3280 * bind to a range of consoles specified by @first and @last. It will
3281 * also initialize the console driver by calling con_startup().
3282 */
3283int register_con_driver(const struct consw *csw, int first, int last)
3284{
3285 struct module *owner = csw->owner;
3286 struct con_driver *con_driver;
3287 const char *desc;
3288 int i, retval = 0;
3289
3290 if (!try_module_get(owner))
3291 return -ENODEV;
3292
3293 acquire_console_sem();
3294
3295 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3296 con_driver = &registered_con_driver[i];
3297
3298 /* already registered */
3299 if (con_driver->con == csw)
3300 retval = -EINVAL;
3301 }
3302
3303 if (retval)
3304 goto err;
3305
3306 desc = csw->con_startup();
3307
3308 if (!desc)
3309 goto err;
3310
3311 retval = -EINVAL;
3312
3313 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3314 con_driver = &registered_con_driver[i];
3315
3316 if (con_driver->con == NULL) {
3317 con_driver->con = csw;
3318 con_driver->desc = desc;
6db4063c
AD		 3319 con_driver->node = i;
3320 con_driver->flag = CON_DRIVER_FLAG_MODULE |
3e795de7
AD		 3321 CON_DRIVER_FLAG_INIT;
3322 con_driver->first = first;
3323 con_driver->last = last;
3324 retval = 0;
3325 break;
3326 }
3327 }
3328
6db4063c
AD		 3329 if (retval)
3330 goto err;
3331
805952a8
GKH		 3332 con_driver->dev = device_create(vtconsole_class, NULL,
3333 MKDEV(0, con_driver->node),
3334 "vtcon%i", con_driver->node);
6db4063c 3335
805952a8
GKH		 3336 if (IS_ERR(con_driver->dev)) {
3337 printk(KERN_WARNING "Unable to create device for %s; "
6db4063c 3338 "errno = %ld\n", con_driver->desc,
805952a8
GKH		 3339 PTR_ERR(con_driver->dev));
3340 con_driver->dev = NULL;
6db4063c 3341 } else {
805952a8 3342 vtconsole_init_device(con_driver);
6db4063c 3343 }
928e964f 3344
3e795de7
AD		 3345err:
3346 release_console_sem();
3347 module_put(owner);
3348 return retval;
3349}
3350EXPORT_SYMBOL(register_con_driver);
3351
3352/**
3353 * unregister_con_driver - unregister console driver from console layer
3354 * @csw: console driver
3355 *
3356 * DESCRIPTION: All drivers that registers to the console layer must
3357 * call this function upon exit, or if the console driver is in a state
3358 * where it won't be able to handle console services, such as the
3359 * framebuffer console without loaded framebuffer drivers.
3360 *
3361 * The driver must unbind first prior to unregistration.
3362 */
3363int unregister_con_driver(const struct consw *csw)
3364{
3365 int i, retval = -ENODEV;
3366
3367 acquire_console_sem();
3368
3369 /* cannot unregister a bound driver */
3370 if (con_is_bound(csw))
3371 goto err;
3372
3373 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3374 struct con_driver *con_driver = &registered_con_driver[i];
3375
3376 if (con_driver->con == csw &&
6db4063c 3377 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
805952a8
GKH		 3378 vtconsole_deinit_device(con_driver);
3379 device_destroy(vtconsole_class,
3380 MKDEV(0, con_driver->node));
3e795de7
AD		 3381 con_driver->con = NULL;
3382 con_driver->desc = NULL;
805952a8 3383 con_driver->dev = NULL;
6db4063c 3384 con_driver->node = 0;
3e795de7
AD		 3385 con_driver->flag = 0;
3386 con_driver->first = 0;
3387 con_driver->last = 0;
3388 retval = 0;
3389 break;
3390 }
3391 }
3e795de7
AD		 3392err:
3393 release_console_sem();
3394 return retval;
3395}
3396EXPORT_SYMBOL(unregister_con_driver);
3397
3398/*
3399 * If we support more console drivers, this function is used
3400 * when a driver wants to take over some existing consoles
3401 * and become default driver for newly opened ones.
3402 *
3403 * take_over_console is basically a register followed by unbind
3404 */
3405int take_over_console(const struct consw *csw, int first, int last, int deflt)
3406{
3407 int err;
3408
3409 err = register_con_driver(csw, first, last);
3410
3411 if (!err)
6db4063c 3412 bind_con_driver(csw, first, last, deflt);
3e795de7
AD		 3413
3414 return err;
3415}
3416
3417/*
3418 * give_up_console is a wrapper to unregister_con_driver. It will only
3419 * work if driver is fully unbound.
3420 */
3421void give_up_console(const struct consw *csw)
3422{
3423 unregister_con_driver(csw);
3424}
3425
6db4063c 3426static int __init vtconsole_class_init(void)
3e795de7 3427{
6db4063c 3428 int i;
3e795de7 3429
6db4063c
AD		 3430 vtconsole_class = class_create(THIS_MODULE, "vtconsole");
3431 if (IS_ERR(vtconsole_class)) {
3432 printk(KERN_WARNING "Unable to create vt console class; "
3433 "errno = %ld\n", PTR_ERR(vtconsole_class));
3434 vtconsole_class = NULL;
3435 }
3e795de7 3436
6db4063c 3437 /* Add system drivers to sysfs */
3e795de7
AD		 3438 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3439 struct con_driver *con = &registered_con_driver[i];
3440
805952a8
GKH		 3441 if (con->con && !con->dev) {
3442 con->dev = device_create(vtconsole_class, NULL,
3443 MKDEV(0, con->node),
3444 "vtcon%i", con->node);
6db4063c 3445
805952a8 3446 if (IS_ERR(con->dev)) {
6db4063c 3447 printk(KERN_WARNING "Unable to create "
805952a8
GKH		 3448 "device for %s; errno = %ld\n",
3449 con->desc, PTR_ERR(con->dev));
3450 con->dev = NULL;
6db4063c 3451 } else {
805952a8 3452 vtconsole_init_device(con);
6db4063c 3453 }
3e795de7 3454 }
3e795de7
AD		 3455 }
3456
3e795de7
AD		 3457 return 0;
3458}
6db4063c 3459postcore_initcall(vtconsole_class_init);
3e795de7 3460
1da177e4
LT		 3461#endif
3462
3463/*
3464 * Screen blanking
3465 */
3466
403aac96 3467static int set_vesa_blanking(char __user *p)
1da177e4 3468{
403aac96
YY		 3469 unsigned int mode;
3470
3471 if (get_user(mode, p + 1))
3472 return -EFAULT;
3473
3474 vesa_blank_mode = (mode < 4) ? mode : 0;
3475 return 0;
1da177e4
LT		 3476}
3477
1da177e4
LT		 3478void do_blank_screen(int entering_gfx)
3479{
3480 struct vc_data *vc = vc_cons[fg_console].d;
3481 int i;
3482
3483 WARN_CONSOLE_UNLOCKED();
3484
3485 if (console_blanked) {
3486 if (blank_state == blank_vesa_wait) {
3487 blank_state = blank_off;
d060a321 3488 vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0);
1da177e4
LT		 3489 }
3490 return;
3491 }
3492 if (blank_state != blank_normal_wait)
3493 return;
3494 blank_state = blank_off;
3495
3496 /* entering graphics mode? */
3497 if (entering_gfx) {
3498 hide_cursor(vc);
3499 save_screen(vc);
3500 vc->vc_sw->con_blank(vc, -1, 1);
3501 console_blanked = fg_console + 1;
3502 set_origin(vc);
3503 return;
3504 }
3505
3506 /* don't blank graphics */
3507 if (vc->vc_mode != KD_TEXT) {
3508 console_blanked = fg_console + 1;
3509 return;
3510 }
3511
3512 hide_cursor(vc);
3513 del_timer_sync(&console_timer);
3514 blank_timer_expired = 0;
3515
3516 save_screen(vc);
3517 /* In case we need to reset origin, blanking hook returns 1 */
d060a321 3518 i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0);
1da177e4
LT		 3519 console_blanked = fg_console + 1;
3520 if (i)
3521 set_origin(vc);
3522
3523 if (console_blank_hook && console_blank_hook(1))
3524 return;
3525
d060a321 3526 if (vesa_off_interval && vesa_blank_mode) {
030babac 3527 blank_state = blank_vesa_wait;
1da177e4
LT		 3528 mod_timer(&console_timer, jiffies + vesa_off_interval);
3529 }
1da177e4
LT		 3530}
3531EXPORT_SYMBOL(do_blank_screen);
3532
3533/*
3534 * Called by timer as well as from vt_console_driver
3535 */
3536void do_unblank_screen(int leaving_gfx)
3537{
3538 struct vc_data *vc;
3539
3540 /* This should now always be called from a "sane" (read: can schedule)
3541 * context for the sake of the low level drivers, except in the special
3542 * case of oops_in_progress
3543 */
3544 if (!oops_in_progress)
3545 might_sleep();
3546
3547 WARN_CONSOLE_UNLOCKED();
3548
3549 ignore_poke = 0;
3550 if (!console_blanked)
3551 return;
3552 if (!vc_cons_allocated(fg_console)) {
3553 /* impossible */
3554 printk("unblank_screen: tty %d not allocated ??\n", fg_console+1);
3555 return;
3556 }
3557 vc = vc_cons[fg_console].d;
3558 if (vc->vc_mode != KD_TEXT)
3559 return; /* but leave console_blanked != 0 */
3560
3561 if (blankinterval) {
3562 mod_timer(&console_timer, jiffies + blankinterval);
3563 blank_state = blank_normal_wait;
3564 }
3565
3566 console_blanked = 0;
3567 if (vc->vc_sw->con_blank(vc, 0, leaving_gfx))
3568 /* Low-level driver cannot restore -> do it ourselves */
3569 update_screen(vc);
3570 if (console_blank_hook)
3571 console_blank_hook(0);
3572 set_palette(vc);
3573 set_cursor(vc);
3574}
3575EXPORT_SYMBOL(do_unblank_screen);
3576
3577/*
3578 * This is called by the outside world to cause a forced unblank, mostly for
3579 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
3580 * call it with 1 as an argument and so force a mode restore... that may kill
3581 * X or at least garbage the screen but would also make the Oops visible...
3582 */
3583void unblank_screen(void)
3584{
3585 do_unblank_screen(0);
3586}
3587
3588/*
70522e12 3589 * We defer the timer blanking to work queue so it can take the console mutex
1da177e4 3590 * (console operations can still happen at irq time, but only from printk which
70522e12 3591 * has the console mutex. Not perfect yet, but better than no locking
1da177e4
LT		 3592 */
3593static void blank_screen_t(unsigned long dummy)
3594{
cc63b1e1
JB		 3595 if (unlikely(!keventd_up())) {
3596 mod_timer(&console_timer, jiffies + blankinterval);
3597 return;
3598 }
1da177e4
LT		 3599 blank_timer_expired = 1;
3600 schedule_work(&console_work);
3601}
3602
3603void poke_blanked_console(void)
3604{
3605 WARN_CONSOLE_UNLOCKED();
3606
3607 /* Add this so we quickly catch whoever might call us in a non
3608 * safe context. Nowadays, unblank_screen() isn't to be called in
3609 * atomic contexts and is allowed to schedule (with the special case
3610 * of oops_in_progress, but that isn't of any concern for this
3611 * function. --BenH.
3612 */
3613 might_sleep();
3614
3615 /* This isn't perfectly race free, but a race here would be mostly harmless,
3616 * at worse, we'll do a spurrious blank and it's unlikely
3617 */
3618 del_timer(&console_timer);
3619 blank_timer_expired = 0;
3620
3621 if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS)
3622 return;
3623 if (console_blanked)
3624 unblank_screen();
3625 else if (blankinterval) {
3626 mod_timer(&console_timer, jiffies + blankinterval);
3627 blank_state = blank_normal_wait;
3628 }
3629}
3630
3631/*
3632 * Palettes
3633 */
3634
3635static void set_palette(struct vc_data *vc)
3636{
3637 WARN_CONSOLE_UNLOCKED();
3638
3639 if (vc->vc_mode != KD_GRAPHICS)
3640 vc->vc_sw->con_set_palette(vc, color_table);
3641}
3642
3643static int set_get_cmap(unsigned char __user *arg, int set)
3644{
3645 int i, j, k;
3646
3647 WARN_CONSOLE_UNLOCKED();
3648
3649 for (i = 0; i < 16; i++)
3650 if (set) {
3651 get_user(default_red[i], arg++);
3652 get_user(default_grn[i], arg++);
3653 get_user(default_blu[i], arg++);
3654 } else {
3655 put_user(default_red[i], arg++);
3656 put_user(default_grn[i], arg++);
3657 put_user(default_blu[i], arg++);
3658 }
3659 if (set) {
3660 for (i = 0; i < MAX_NR_CONSOLES; i++)
3661 if (vc_cons_allocated(i)) {
3662 for (j = k = 0; j < 16; j++) {
3663 vc_cons[i].d->vc_palette[k++] = default_red[j];
3664 vc_cons[i].d->vc_palette[k++] = default_grn[j];
3665 vc_cons[i].d->vc_palette[k++] = default_blu[j];
3666 }
3667 set_palette(vc_cons[i].d);
3668 }
3669 }
3670 return 0;
3671}
3672
3673/*
3674 * Load palette into the DAC registers. arg points to a colour
3675 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
3676 */
3677
3678int con_set_cmap(unsigned char __user *arg)
3679{
3680 int rc;
3681
3682 acquire_console_sem();
3683 rc = set_get_cmap (arg,1);
3684 release_console_sem();
3685
3686 return rc;
3687}
3688
3689int con_get_cmap(unsigned char __user *arg)
3690{
3691 int rc;
3692
3693 acquire_console_sem();
3694 rc = set_get_cmap (arg,0);
3695 release_console_sem();
3696
3697 return rc;
3698}
3699
3700void reset_palette(struct vc_data *vc)
3701{
3702 int j, k;
3703 for (j=k=0; j<16; j++) {
3704 vc->vc_palette[k++] = default_red[j];
3705 vc->vc_palette[k++] = default_grn[j];
3706 vc->vc_palette[k++] = default_blu[j];
3707 }
3708 set_palette(vc);
3709}
3710
3711/*
3712 * Font switching
3713 *
3714 * Currently we only support fonts up to 32 pixels wide, at a maximum height
3715 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
3716 * depending on width) reserved for each character which is kinda wasty, but
3717 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
3718 * is upto the actual low-level console-driver convert data into its favorite
3719 * format (maybe we should add a `fontoffset' field to the `display'
3720 * structure so we won't have to convert the fontdata all the time.
3721 * /Jes
3722 */
3723
3724#define max_font_size 65536
3725
3726static int con_font_get(struct vc_data *vc, struct console_font_op *op)
3727{
3728 struct console_font font;
3729 int rc = -EINVAL;
3730 int c;
3731
3732 if (vc->vc_mode != KD_TEXT)
3733 return -EINVAL;
3734
3735 if (op->data) {
3736 font.data = kmalloc(max_font_size, GFP_KERNEL);
3737 if (!font.data)
3738 return -ENOMEM;
3739 } else
3740 font.data = NULL;
3741
3742 acquire_console_sem();
3743 if (vc->vc_sw->con_font_get)
3744 rc = vc->vc_sw->con_font_get(vc, &font);
3745 else
3746 rc = -ENOSYS;
3747 release_console_sem();
3748
3749 if (rc)
3750 goto out;
3751
3752 c = (font.width+7)/8 * 32 * font.charcount;
3753
3754 if (op->data && font.charcount > op->charcount)
3755 rc = -ENOSPC;
3756 if (!(op->flags & KD_FONT_FLAG_OLD)) {
3757 if (font.width > op->width || font.height > op->height)
3758 rc = -ENOSPC;
3759 } else {
3760 if (font.width != 8)
3761 rc = -EIO;
3762 else if ((op->height && font.height > op->height) ||
3763 font.height > 32)
3764 rc = -ENOSPC;
3765 }
3766 if (rc)
3767 goto out;
3768
3769 op->height = font.height;
3770 op->width = font.width;
3771 op->charcount = font.charcount;
3772
3773 if (op->data && copy_to_user(op->data, font.data, c))
3774 rc = -EFAULT;
3775
3776out:
3777 kfree(font.data);
3778 return rc;
3779}
3780
3781static int con_font_set(struct vc_data *vc, struct console_font_op *op)
3782{
3783 struct console_font font;
3784 int rc = -EINVAL;
3785 int size;
3786
3787 if (vc->vc_mode != KD_TEXT)
3788 return -EINVAL;
3789 if (!op->data)
3790 return -EINVAL;
3791 if (op->charcount > 512)
3792 return -EINVAL;
3793 if (!op->height) { /* Need to guess font height [compat] */
3794 int h, i;
3795 u8 __user *charmap = op->data;
3796 u8 tmp;
3797
3798 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
3799 so that we can get rid of this soon */
3800 if (!(op->flags & KD_FONT_FLAG_OLD))
3801 return -EINVAL;
3802 for (h = 32; h > 0; h--)
3803 for (i = 0; i < op->charcount; i++) {
3804 if (get_user(tmp, &charmap[32*i+h-1]))
3805 return -EFAULT;
3806 if (tmp)
3807 goto nonzero;
3808 }
3809 return -EINVAL;
3810 nonzero:
3811 op->height = h;
3812 }
3813 if (op->width <= 0 || op->width > 32 || op->height > 32)
3814 return -EINVAL;
3815 size = (op->width+7)/8 * 32 * op->charcount;
3816 if (size > max_font_size)
3817 return -ENOSPC;
3818 font.charcount = op->charcount;
3819 font.height = op->height;
3820 font.width = op->width;
3821 font.data = kmalloc(size, GFP_KERNEL);
3822 if (!font.data)
3823 return -ENOMEM;
3824 if (copy_from_user(font.data, op->data, size)) {
3825 kfree(font.data);
3826 return -EFAULT;
3827 }
3828 acquire_console_sem();
3829 if (vc->vc_sw->con_font_set)
3830 rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
3831 else
3832 rc = -ENOSYS;
3833 release_console_sem();
3834 kfree(font.data);
3835 return rc;
3836}
3837
3838static int con_font_default(struct vc_data *vc, struct console_font_op *op)
3839{
3840 struct console_font font = {.width = op->width, .height = op->height};
3841 char name[MAX_FONT_NAME];
3842 char *s = name;
3843 int rc;
3844
3845 if (vc->vc_mode != KD_TEXT)
3846 return -EINVAL;
3847
3848 if (!op->data)
3849 s = NULL;
3850 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0)
3851 return -EFAULT;
3852 else
3853 name[MAX_FONT_NAME - 1] = 0;
3854
3855 acquire_console_sem();
3856 if (vc->vc_sw->con_font_default)
3857 rc = vc->vc_sw->con_font_default(vc, &font, s);
3858 else
3859 rc = -ENOSYS;
3860 release_console_sem();
3861 if (!rc) {
3862 op->width = font.width;
3863 op->height = font.height;
3864 }
3865 return rc;
3866}
3867
3868static int con_font_copy(struct vc_data *vc, struct console_font_op *op)
3869{
3870 int con = op->height;
3871 int rc;
3872
3873 if (vc->vc_mode != KD_TEXT)
3874 return -EINVAL;
3875
3876 acquire_console_sem();
3877 if (!vc->vc_sw->con_font_copy)
3878 rc = -ENOSYS;
3879 else if (con < 0 || !vc_cons_allocated(con))
3880 rc = -ENOTTY;
3881 else if (con == vc->vc_num) /* nothing to do */
3882 rc = 0;
3883 else
3884 rc = vc->vc_sw->con_font_copy(vc, con);
3885 release_console_sem();
3886 return rc;
3887}
3888
3889int con_font_op(struct vc_data *vc, struct console_font_op *op)
3890{
3891 switch (op->op) {
3892 case KD_FONT_OP_SET:
3893 return con_font_set(vc, op);
3894 case KD_FONT_OP_GET:
3895 return con_font_get(vc, op);
3896 case KD_FONT_OP_SET_DEFAULT:
3897 return con_font_default(vc, op);
3898 case KD_FONT_OP_COPY:
3899 return con_font_copy(vc, op);
3900 }
3901 return -ENOSYS;
3902}
3903
3904/*
3905 * Interface exported to selection and vcs.
3906 */
3907
3908/* used by selection */
3909u16 screen_glyph(struct vc_data *vc, int offset)
3910{
3911 u16 w = scr_readw(screenpos(vc, offset, 1));
3912 u16 c = w & 0xff;
3913
3914 if (w & vc->vc_hi_font_mask)
3915 c |= 0x100;
3916 return c;
3917}
3918
3919/* used by vcs - note the word offset */
3920unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed)
3921{
3922 return screenpos(vc, 2 * w_offset, viewed);
3923}
3924
3925void getconsxy(struct vc_data *vc, unsigned char *p)
3926{
3927 p[0] = vc->vc_x;
3928 p[1] = vc->vc_y;
3929}
3930
3931void putconsxy(struct vc_data *vc, unsigned char *p)
3932{
9477e260 3933 hide_cursor(vc);
1da177e4
LT		 3934 gotoxy(vc, p[0], p[1]);
3935 set_cursor(vc);
3936}
3937
3938u16 vcs_scr_readw(struct vc_data *vc, const u16 *org)
3939{
3940 if ((unsigned long)org == vc->vc_pos && softcursor_original != -1)
3941 return softcursor_original;
3942 return scr_readw(org);
3943}
3944
3945void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org)
3946{
3947 scr_writew(val, org);
3948 if ((unsigned long)org == vc->vc_pos) {
3949 softcursor_original = -1;
3950 add_softcursor(vc);
3951 }
3952}
3953
3954/*
3955 * Visible symbols for modules
3956 */
3957
3958EXPORT_SYMBOL(color_table);
3959EXPORT_SYMBOL(default_red);
3960EXPORT_SYMBOL(default_grn);
3961EXPORT_SYMBOL(default_blu);
3962EXPORT_SYMBOL(update_region);
3963EXPORT_SYMBOL(redraw_screen);
3964EXPORT_SYMBOL(vc_resize);
ca9bda00 3965EXPORT_SYMBOL(vc_lock_resize);
1da177e4
LT		 3966EXPORT_SYMBOL(fg_console);
3967EXPORT_SYMBOL(console_blank_hook);
3968EXPORT_SYMBOL(console_blanked);
3969EXPORT_SYMBOL(vc_cons);
3970#ifndef VT_SINGLE_DRIVER
3971EXPORT_SYMBOL(take_over_console);
3972EXPORT_SYMBOL(give_up_console);
3973#endif
Linux kernel - Deliverables
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