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vt: add color support to the "underline" and "italic" attributes
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / char / vt.c
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1da177e4
LT		 1/*
2 * linux/drivers/char/vt.c
3 *
4 * Copyright (C) 1991, 1992 Linus Torvalds
5 */
6
7/*
8 * Hopefully this will be a rather complete VT102 implementation.
9 *
10 * Beeping thanks to John T Kohl.
11 *
12 * Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics
13 * Chars, and VT100 enhancements by Peter MacDonald.
14 *
15 * Copy and paste function by Andrew Haylett,
16 * some enhancements by Alessandro Rubini.
17 *
18 * Code to check for different video-cards mostly by Galen Hunt,
19 * <g-hunt@ee.utah.edu>
20 *
21 * Rudimentary ISO 10646/Unicode/UTF-8 character set support by
22 * Markus Kuhn, <mskuhn@immd4.informatik.uni-erlangen.de>.
23 *
24 * Dynamic allocation of consoles, aeb@cwi.nl, May 1994
25 * Resizing of consoles, aeb, 940926
26 *
27 * Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94
28 * <poe@daimi.aau.dk>
29 *
30 * User-defined bell sound, new setterm control sequences and printk
31 * redirection by Martin Mares <mj@k332.feld.cvut.cz> 19-Nov-95
32 *
33 * APM screenblank bug fixed Takashi Manabe <manabe@roy.dsl.tutics.tut.jp>
34 *
35 * Merge with the abstract console driver by Geert Uytterhoeven
36 * <geert@linux-m68k.org>, Jan 1997.
37 *
38 * Original m68k console driver modifications by
39 *
40 * - Arno Griffioen <arno@usn.nl>
41 * - David Carter <carter@cs.bris.ac.uk>
42 *
43 * The abstract console driver provides a generic interface for a text
44 * console. It supports VGA text mode, frame buffer based graphical consoles
45 * and special graphics processors that are only accessible through some
46 * registers (e.g. a TMS340x0 GSP).
47 *
48 * The interface to the hardware is specified using a special structure
49 * (struct consw) which contains function pointers to console operations
50 * (see <linux/console.h> for more information).
51 *
52 * Support for changeable cursor shape
53 * by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997
54 *
55 * Ported to i386 and con_scrolldelta fixed
56 * by Emmanuel Marty <core@ggi-project.org>, April 1998
57 *
58 * Resurrected character buffers in videoram plus lots of other trickery
59 * by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998
60 *
61 * Removed old-style timers, introduced console_timer, made timer
62 * deletion SMP-safe. 17Jun00, Andrew Morton <andrewm@uow.edu.au>
63 *
64 * Removed console_lock, enabled interrupts across all console operations
65 * 13 March 2001, Andrew Morton
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>
1da177e4
LT		 89#include <linux/vt_kern.h>
90#include <linux/selection.h>
91#include <linux/tiocl.h>
92#include <linux/kbd_kern.h>
93#include <linux/consolemap.h>
94#include <linux/timer.h>
95#include <linux/interrupt.h>
1da177e4
LT		 96#include <linux/workqueue.h>
97#include <linux/bootmem.h>
98#include <linux/pm.h>
99#include <linux/font.h>
100#include <linux/bitops.h>
101
102#include <asm/io.h>
103#include <asm/system.h>
104#include <asm/uaccess.h>
105
3e795de7 106#define MAX_NR_CON_DRIVER 16
1da177e4 107
6db4063c 108#define CON_DRIVER_FLAG_MODULE 1
928e964f
AD		 109#define CON_DRIVER_FLAG_INIT 2
110#define CON_DRIVER_FLAG_ATTR 4
3e795de7
AD		 111
112struct con_driver {
113 const struct consw *con;
114 const char *desc;
805952a8 115 struct device *dev;
6db4063c 116 int node;
3e795de7
AD		 117 int first;
118 int last;
119 int flag;
120};
121
122static struct con_driver registered_con_driver[MAX_NR_CON_DRIVER];
1da177e4
LT		 123const struct consw *conswitchp;
124
125/* A bitmap for codes <32. A bit of 1 indicates that the code
126 * corresponding to that bit number invokes some special action
127 * (such as cursor movement) and should not be displayed as a
128 * glyph unless the disp_ctrl mode is explicitly enabled.
129 */
130#define CTRL_ACTION 0x0d00ff81
131#define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */
132
133/*
134 * Here is the default bell parameters: 750HZ, 1/8th of a second
135 */
136#define DEFAULT_BELL_PITCH 750
137#define DEFAULT_BELL_DURATION (HZ/8)
138
1da177e4
LT		 139struct vc vc_cons [MAX_NR_CONSOLES];
140
141#ifndef VT_SINGLE_DRIVER
142static const struct consw *con_driver_map[MAX_NR_CONSOLES];
143#endif
144
145static int con_open(struct tty_struct *, struct file *);
146static void vc_init(struct vc_data *vc, unsigned int rows,
147 unsigned int cols, int do_clear);
148static void gotoxy(struct vc_data *vc, int new_x, int new_y);
149static void save_cur(struct vc_data *vc);
150static void reset_terminal(struct vc_data *vc, int do_clear);
151static void con_flush_chars(struct tty_struct *tty);
403aac96 152static int set_vesa_blanking(char __user *p);
1da177e4
LT		 153static void set_cursor(struct vc_data *vc);
154static void hide_cursor(struct vc_data *vc);
65f27f38 155static void console_callback(struct work_struct *ignored);
1da177e4
LT		 156static void blank_screen_t(unsigned long dummy);
157static void set_palette(struct vc_data *vc);
158
159static int printable; /* Is console ready for printing? */
160
161/*
162 * ignore_poke: don't unblank the screen when things are typed. This is
163 * mainly for the privacy of braille terminal users.
164 */
165static int ignore_poke;
166
167int do_poke_blanked_console;
168int console_blanked;
169
170static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
171static int blankinterval = 10*60*HZ;
172static int vesa_off_interval;
173
65f27f38 174static DECLARE_WORK(console_work, console_callback);
1da177e4
LT		 175
176/*
177 * fg_console is the current virtual console,
178 * last_console is the last used one,
179 * want_console is the console we want to switch to,
180 * kmsg_redirect is the console for kernel messages,
181 */
182int fg_console;
183int last_console;
184int want_console = -1;
185int kmsg_redirect;
186
187/*
188 * For each existing display, we have a pointer to console currently visible
189 * on that display, allowing consoles other than fg_console to be refreshed
190 * appropriately. Unless the low-level driver supplies its own display_fg
191 * variable, we use this one for the "master display".
192 */
193static struct vc_data *master_display_fg;
194
195/*
196 * Unfortunately, we need to delay tty echo when we're currently writing to the
197 * console since the code is (and always was) not re-entrant, so we schedule
198 * all flip requests to process context with schedule-task() and run it from
199 * console_callback().
200 */
201
202/*
203 * For the same reason, we defer scrollback to the console callback.
204 */
205static int scrollback_delta;
206
207/*
208 * Hook so that the power management routines can (un)blank
209 * the console on our behalf.
210 */
211int (*console_blank_hook)(int);
212
40565f19 213static DEFINE_TIMER(console_timer, blank_screen_t, 0, 0);
1da177e4
LT		 214static int blank_state;
215static int blank_timer_expired;
216enum {
217 blank_off = 0,
218 blank_normal_wait,
219 blank_vesa_wait,
220};
221
222/*
223 * Low-Level Functions
224 */
225
226#define IS_FG(vc) ((vc)->vc_num == fg_console)
227
228#ifdef VT_BUF_VRAM_ONLY
229#define DO_UPDATE(vc) 0
230#else
231#define DO_UPDATE(vc) CON_IS_VISIBLE(vc)
232#endif
233
234static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed)
235{
236 unsigned short *p;
237
238 if (!viewed)
239 p = (unsigned short *)(vc->vc_origin + offset);
240 else if (!vc->vc_sw->con_screen_pos)
241 p = (unsigned short *)(vc->vc_visible_origin + offset);
242 else
243 p = vc->vc_sw->con_screen_pos(vc, offset);
244 return p;
245}
246
247static inline void scrolldelta(int lines)
248{
249 scrollback_delta += lines;
250 schedule_console_callback();
251}
252
253void schedule_console_callback(void)
254{
255 schedule_work(&console_work);
256}
257
258static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
259{
260 unsigned short *d, *s;
261
262 if (t+nr >= b)
263 nr = b - t - 1;
264 if (b > vc->vc_rows || t >= b || nr < 1)
265 return;
266 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr))
267 return;
268 d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
269 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr));
270 scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row);
271 scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_video_erase_char,
272 vc->vc_size_row * nr);
273}
274
275static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
276{
277 unsigned short *s;
278 unsigned int step;
279
280 if (t+nr >= b)
281 nr = b - t - 1;
282 if (b > vc->vc_rows || t >= b || nr < 1)
283 return;
284 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr))
285 return;
286 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
287 step = vc->vc_cols * nr;
288 scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row);
289 scr_memsetw(s, vc->vc_video_erase_char, 2 * step);
290}
291
292static void do_update_region(struct vc_data *vc, unsigned long start, int count)
293{
294#ifndef VT_BUF_VRAM_ONLY
295 unsigned int xx, yy, offset;
296 u16 *p;
297
298 p = (u16 *) start;
299 if (!vc->vc_sw->con_getxy) {
300 offset = (start - vc->vc_origin) / 2;
301 xx = offset % vc->vc_cols;
302 yy = offset / vc->vc_cols;
303 } else {
304 int nxx, nyy;
305 start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy);
306 xx = nxx; yy = nyy;
307 }
308 for(;;) {
309 u16 attrib = scr_readw(p) & 0xff00;
310 int startx = xx;
311 u16 *q = p;
312 while (xx < vc->vc_cols && count) {
313 if (attrib != (scr_readw(p) & 0xff00)) {
314 if (p > q)
315 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
316 startx = xx;
317 q = p;
318 attrib = scr_readw(p) & 0xff00;
319 }
320 p++;
321 xx++;
322 count--;
323 }
324 if (p > q)
325 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
326 if (!count)
327 break;
328 xx = 0;
329 yy++;
330 if (vc->vc_sw->con_getxy) {
331 p = (u16 *)start;
332 start = vc->vc_sw->con_getxy(vc, start, NULL, NULL);
333 }
334 }
335#endif
336}
337
338void update_region(struct vc_data *vc, unsigned long start, int count)
339{
340 WARN_CONSOLE_UNLOCKED();
341
342 if (DO_UPDATE(vc)) {
343 hide_cursor(vc);
344 do_update_region(vc, start, count);
345 set_cursor(vc);
346 }
347}
348
349/* Structure of attributes is hardware-dependent */
350
fa6ce9ab
JE		 351static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink,
352 u8 _underline, u8 _reverse, u8 _italic)
1da177e4
LT		 353{
354 if (vc->vc_sw->con_build_attr)
fa6ce9ab
JE		 355 return vc->vc_sw->con_build_attr(vc, _color, _intensity,
356 _blink, _underline, _reverse, _italic);
1da177e4
LT		 357
358#ifndef VT_BUF_VRAM_ONLY
359/*
360 * ++roman: I completely changed the attribute format for monochrome
361 * mode (!can_do_color). The formerly used MDA (monochrome display
362 * adapter) format didn't allow the combination of certain effects.
363 * Now the attribute is just a bit vector:
364 * Bit 0..1: intensity (0..2)
365 * Bit 2 : underline
366 * Bit 3 : reverse
367 * Bit 7 : blink
368 */
369 {
370 u8 a = vc->vc_color;
371 if (!vc->vc_can_do_color)
372 return _intensity |
fa6ce9ab 373 (_italic ? 2 : 0) |
1da177e4
LT		 374 (_underline ? 4 : 0) |
375 (_reverse ? 8 : 0) |
376 (_blink ? 0x80 : 0);
fa6ce9ab
JE		 377 if (_italic)
378 a = (a & 0xF0) | vc->vc_itcolor;
379 else if (_underline)
1da177e4
LT		 380 a = (a & 0xf0) | vc->vc_ulcolor;
381 else if (_intensity == 0)
382 a = (a & 0xf0) | vc->vc_ulcolor;
383 if (_reverse)
384 a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77);
385 if (_blink)
386 a ^= 0x80;
387 if (_intensity == 2)
388 a ^= 0x08;
389 if (vc->vc_hi_font_mask == 0x100)
390 a <<= 1;
391 return a;
392 }
393#else
394 return 0;
395#endif
396}
397
398static void update_attr(struct vc_data *vc)
399{
fa6ce9ab
JE		 400 vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity,
401 vc->vc_blink, vc->vc_underline,
402 vc->vc_reverse ^ vc->vc_decscnm, vc->vc_italic);
403 vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm, 0) << 8) | ' ';
1da177e4
LT		 404}
405
406/* Note: inverting the screen twice should revert to the original state */
407void invert_screen(struct vc_data *vc, int offset, int count, int viewed)
408{
409 unsigned short *p;
410
411 WARN_CONSOLE_UNLOCKED();
412
413 count /= 2;
414 p = screenpos(vc, offset, viewed);
415 if (vc->vc_sw->con_invert_region)
416 vc->vc_sw->con_invert_region(vc, p, count);
417#ifndef VT_BUF_VRAM_ONLY
418 else {
419 u16 *q = p;
420 int cnt = count;
421 u16 a;
422
423 if (!vc->vc_can_do_color) {
424 while (cnt--) {
425 a = scr_readw(q);
426 a ^= 0x0800;
427 scr_writew(a, q);
428 q++;
429 }
430 } else if (vc->vc_hi_font_mask == 0x100) {
431 while (cnt--) {
432 a = scr_readw(q);
433 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4);
434 scr_writew(a, q);
435 q++;
436 }
437 } else {
438 while (cnt--) {
439 a = scr_readw(q);
440 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4);
441 scr_writew(a, q);
442 q++;
443 }
444 }
445 }
446#endif
447 if (DO_UPDATE(vc))
448 do_update_region(vc, (unsigned long) p, count);
449}
450
451/* used by selection: complement pointer position */
452void complement_pos(struct vc_data *vc, int offset)
453{
414edcd3 454 static int old_offset = -1;
1da177e4
LT		 455 static unsigned short old;
456 static unsigned short oldx, oldy;
457
458 WARN_CONSOLE_UNLOCKED();
459
414edcd3
AD		 460 if (old_offset != -1 && old_offset >= 0 &&
461 old_offset < vc->vc_screenbuf_size) {
462 scr_writew(old, screenpos(vc, old_offset, 1));
1da177e4
LT		 463 if (DO_UPDATE(vc))
464 vc->vc_sw->con_putc(vc, old, oldy, oldx);
465 }
414edcd3
AD		 466
467 old_offset = offset;
468
469 if (offset != -1 && offset >= 0 &&
470 offset < vc->vc_screenbuf_size) {
1da177e4 471 unsigned short new;
414edcd3 472 unsigned short *p;
1da177e4
LT		 473 p = screenpos(vc, offset, 1);
474 old = scr_readw(p);
475 new = old ^ vc->vc_complement_mask;
476 scr_writew(new, p);
477 if (DO_UPDATE(vc)) {
478 oldx = (offset >> 1) % vc->vc_cols;
479 oldy = (offset >> 1) / vc->vc_cols;
480 vc->vc_sw->con_putc(vc, new, oldy, oldx);
481 }
482 }
414edcd3 483
1da177e4
LT		 484}
485
486static void insert_char(struct vc_data *vc, unsigned int nr)
487{
488 unsigned short *p, *q = (unsigned short *)vc->vc_pos;
489
490 p = q + vc->vc_cols - nr - vc->vc_x;
491 while (--p >= q)
492 scr_writew(scr_readw(p), p + nr);
493 scr_memsetw(q, vc->vc_video_erase_char, nr * 2);
494 vc->vc_need_wrap = 0;
495 if (DO_UPDATE(vc)) {
496 unsigned short oldattr = vc->vc_attr;
497 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x, vc->vc_y, vc->vc_x + nr, 1,
498 vc->vc_cols - vc->vc_x - nr);
499 vc->vc_attr = vc->vc_video_erase_char >> 8;
500 while (nr--)
501 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y, vc->vc_x + nr);
502 vc->vc_attr = oldattr;
503 }
504}
505
506static void delete_char(struct vc_data *vc, unsigned int nr)
507{
508 unsigned int i = vc->vc_x;
509 unsigned short *p = (unsigned short *)vc->vc_pos;
510
511 while (++i <= vc->vc_cols - nr) {
512 scr_writew(scr_readw(p+nr), p);
513 p++;
514 }
515 scr_memsetw(p, vc->vc_video_erase_char, nr * 2);
516 vc->vc_need_wrap = 0;
517 if (DO_UPDATE(vc)) {
518 unsigned short oldattr = vc->vc_attr;
519 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x + nr, vc->vc_y, vc->vc_x, 1,
520 vc->vc_cols - vc->vc_x - nr);
521 vc->vc_attr = vc->vc_video_erase_char >> 8;
522 while (nr--)
523 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y,
524 vc->vc_cols - 1 - nr);
525 vc->vc_attr = oldattr;
526 }
527}
528
529static int softcursor_original;
530
531static void add_softcursor(struct vc_data *vc)
532{
533 int i = scr_readw((u16 *) vc->vc_pos);
534 u32 type = vc->vc_cursor_type;
535
536 if (! (type & 0x10)) return;
537 if (softcursor_original != -1) return;
538 softcursor_original = i;
539 i |= ((type >> 8) & 0xff00 );
540 i ^= ((type) & 0xff00 );
541 if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000;
542 if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700;
543 scr_writew(i, (u16 *) vc->vc_pos);
544 if (DO_UPDATE(vc))
545 vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x);
546}
547
548static void hide_softcursor(struct vc_data *vc)
549{
550 if (softcursor_original != -1) {
551 scr_writew(softcursor_original, (u16 *)vc->vc_pos);
552 if (DO_UPDATE(vc))
553 vc->vc_sw->con_putc(vc, softcursor_original,
554 vc->vc_y, vc->vc_x);
555 softcursor_original = -1;
556 }
557}
558
559static void hide_cursor(struct vc_data *vc)
560{
561 if (vc == sel_cons)
562 clear_selection();
563 vc->vc_sw->con_cursor(vc, CM_ERASE);
564 hide_softcursor(vc);
565}
566
567static void set_cursor(struct vc_data *vc)
568{
569 if (!IS_FG(vc) || console_blanked ||
570 vc->vc_mode == KD_GRAPHICS)
571 return;
572 if (vc->vc_deccm) {
573 if (vc == sel_cons)
574 clear_selection();
575 add_softcursor(vc);
576 if ((vc->vc_cursor_type & 0x0f) != 1)
577 vc->vc_sw->con_cursor(vc, CM_DRAW);
578 } else
579 hide_cursor(vc);
580}
581
582static void set_origin(struct vc_data *vc)
583{
584 WARN_CONSOLE_UNLOCKED();
585
586 if (!CON_IS_VISIBLE(vc) ||
587 !vc->vc_sw->con_set_origin ||
588 !vc->vc_sw->con_set_origin(vc))
589 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
590 vc->vc_visible_origin = vc->vc_origin;
591 vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size;
592 vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x;
593}
594
595static inline void save_screen(struct vc_data *vc)
596{
597 WARN_CONSOLE_UNLOCKED();
598
599 if (vc->vc_sw->con_save_screen)
600 vc->vc_sw->con_save_screen(vc);
601}
602
603/*
604 * Redrawing of screen
605 */
606
607static void clear_buffer_attributes(struct vc_data *vc)
608{
609 unsigned short *p = (unsigned short *)vc->vc_origin;
610 int count = vc->vc_screenbuf_size / 2;
611 int mask = vc->vc_hi_font_mask | 0xff;
612
613 for (; count > 0; count--, p++) {
614 scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p);
615 }
616}
617
618void redraw_screen(struct vc_data *vc, int is_switch)
619{
620 int redraw = 0;
621
622 WARN_CONSOLE_UNLOCKED();
623
624 if (!vc) {
625 /* strange ... */
626 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
627 return;
628 }
629
630 if (is_switch) {
631 struct vc_data *old_vc = vc_cons[fg_console].d;
632 if (old_vc == vc)
633 return;
634 if (!CON_IS_VISIBLE(vc))
635 redraw = 1;
636 *vc->vc_display_fg = vc;
637 fg_console = vc->vc_num;
638 hide_cursor(old_vc);
639 if (!CON_IS_VISIBLE(old_vc)) {
640 save_screen(old_vc);
641 set_origin(old_vc);
642 }
643 } else {
644 hide_cursor(vc);
645 redraw = 1;
646 }
647
648 if (redraw) {
649 int update;
650 int old_was_color = vc->vc_can_do_color;
651
652 set_origin(vc);
653 update = vc->vc_sw->con_switch(vc);
654 set_palette(vc);
655 /*
656 * If console changed from mono<->color, the best we can do
657 * is to clear the buffer attributes. As it currently stands,
658 * rebuilding new attributes from the old buffer is not doable
659 * without overly complex code.
660 */
661 if (old_was_color != vc->vc_can_do_color) {
662 update_attr(vc);
663 clear_buffer_attributes(vc);
664 }
665 if (update && vc->vc_mode != KD_GRAPHICS)
666 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
667 }
668 set_cursor(vc);
669 if (is_switch) {
670 set_leds();
671 compute_shiftstate();
672 }
673}
674
675/*
676 * Allocation, freeing and resizing of VTs.
677 */
678
679int vc_cons_allocated(unsigned int i)
680{
681 return (i < MAX_NR_CONSOLES && vc_cons[i].d);
682}
683
684static void visual_init(struct vc_data *vc, int num, int init)
685{
686 /* ++Geert: vc->vc_sw->con_init determines console size */
687 if (vc->vc_sw)
688 module_put(vc->vc_sw->owner);
689 vc->vc_sw = conswitchp;
690#ifndef VT_SINGLE_DRIVER
691 if (con_driver_map[num])
692 vc->vc_sw = con_driver_map[num];
693#endif
694 __module_get(vc->vc_sw->owner);
695 vc->vc_num = num;
696 vc->vc_display_fg = &master_display_fg;
697 vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir;
698 vc->vc_uni_pagedir = 0;
699 vc->vc_hi_font_mask = 0;
700 vc->vc_complement_mask = 0;
701 vc->vc_can_do_color = 0;
702 vc->vc_sw->con_init(vc, init);
703 if (!vc->vc_complement_mask)
704 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
705 vc->vc_s_complement_mask = vc->vc_complement_mask;
706 vc->vc_size_row = vc->vc_cols << 1;
707 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
708}
709
710int vc_allocate(unsigned int currcons) /* return 0 on success */
711{
712 WARN_CONSOLE_UNLOCKED();
713
714 if (currcons >= MAX_NR_CONSOLES)
715 return -ENXIO;
716 if (!vc_cons[currcons].d) {
717 struct vc_data *vc;
718
719 /* prevent users from taking too much memory */
720 if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE))
721 return -EPERM;
722
723 /* due to the granularity of kmalloc, we waste some memory here */
724 /* the alloc is done in two steps, to optimize the common situation
725 of a 25x80 console (structsize=216, screenbuf_size=4000) */
726 /* although the numbers above are not valid since long ago, the
727 point is still up-to-date and the comment still has its value
728 even if only as a historical artifact. --mj, July 1998 */
729 vc = kmalloc(sizeof(struct vc_data), GFP_KERNEL);
730 if (!vc)
731 return -ENOMEM;
732 memset(vc, 0, sizeof(*vc));
733 vc_cons[currcons].d = vc;
c2c88f10 734 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
1da177e4
LT		 735 visual_init(vc, currcons, 1);
736 if (!*vc->vc_uni_pagedir_loc)
737 con_set_default_unimap(vc);
254e948b
CM		 738 if (!vc->vc_kmalloced)
739 vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL);
1da177e4
LT		 740 if (!vc->vc_screenbuf) {
741 kfree(vc);
742 vc_cons[currcons].d = NULL;
743 return -ENOMEM;
744 }
745 vc->vc_kmalloced = 1;
746 vc_init(vc, vc->vc_rows, vc->vc_cols, 1);
747 }
748 return 0;
749}
750
751static inline int resize_screen(struct vc_data *vc, int width, int height)
752{
753 /* Resizes the resolution of the display adapater */
754 int err = 0;
755
756 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize)
757 err = vc->vc_sw->con_resize(vc, width, height);
758 return err;
759}
760
761/*
762 * Change # of rows and columns (0 means unchanged/the size of fg_console)
763 * [this is to be used together with some user program
764 * like resize that changes the hardware videomode]
765 */
766#define VC_RESIZE_MAXCOL (32767)
767#define VC_RESIZE_MAXROW (32767)
768int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int lines)
769{
770 unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0;
771 unsigned int old_cols, old_rows, old_row_size, old_screen_size;
772 unsigned int new_cols, new_rows, new_row_size, new_screen_size;
3b41dc1a 773 unsigned int end;
1da177e4
LT		 774 unsigned short *newscreen;
775
776 WARN_CONSOLE_UNLOCKED();
777
778 if (!vc)
779 return -ENXIO;
780
781 if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW)
782 return -EINVAL;
783
784 new_cols = (cols ? cols : vc->vc_cols);
785 new_rows = (lines ? lines : vc->vc_rows);
786 new_row_size = new_cols << 1;
787 new_screen_size = new_row_size * new_rows;
788
789 if (new_cols == vc->vc_cols && new_rows == vc->vc_rows)
790 return 0;
791
5cbded58 792 newscreen = kmalloc(new_screen_size, GFP_USER);
1da177e4
LT		 793 if (!newscreen)
794 return -ENOMEM;
795
796 old_rows = vc->vc_rows;
797 old_cols = vc->vc_cols;
798 old_row_size = vc->vc_size_row;
799 old_screen_size = vc->vc_screenbuf_size;
800
801 err = resize_screen(vc, new_cols, new_rows);
802 if (err) {
803 kfree(newscreen);
804 return err;
805 }
806
807 vc->vc_rows = new_rows;
808 vc->vc_cols = new_cols;
809 vc->vc_size_row = new_row_size;
810 vc->vc_screenbuf_size = new_screen_size;
811
812 rlth = min(old_row_size, new_row_size);
813 rrem = new_row_size - rlth;
814 old_origin = vc->vc_origin;
815 new_origin = (long) newscreen;
816 new_scr_end = new_origin + new_screen_size;
3b41dc1a
AD		 817
818 if (vc->vc_y > new_rows) {
819 if (old_rows - vc->vc_y < new_rows) {
820 /*
821 * Cursor near the bottom, copy contents from the
822 * bottom of buffer
823 */
824 old_origin += (old_rows - new_rows) * old_row_size;
825 end = vc->vc_scr_end;
826 } else {
827 /*
828 * Cursor is in no man's land, copy 1/2 screenful
829 * from the top and bottom of cursor position
830 */
831 old_origin += (vc->vc_y - new_rows/2) * old_row_size;
065d9cac 832 end = old_origin + (old_row_size * new_rows);
3b41dc1a
AD		 833 }
834 } else
835 /*
836 * Cursor near the top, copy contents from the top of buffer
837 */
065d9cac
AD		 838 end = (old_rows > new_rows) ? old_origin +
839 (old_row_size * new_rows) :
3b41dc1a 840 vc->vc_scr_end;
1da177e4
LT		 841
842 update_attr(vc);
843
3b41dc1a
AD		 844 while (old_origin < end) {
845 scr_memcpyw((unsigned short *) new_origin,
846 (unsigned short *) old_origin, rlth);
1da177e4 847 if (rrem)
3b41dc1a
AD		 848 scr_memsetw((void *)(new_origin + rlth),
849 vc->vc_video_erase_char, rrem);
1da177e4
LT		 850 old_origin += old_row_size;
851 new_origin += new_row_size;
852 }
853 if (new_scr_end > new_origin)
3b41dc1a
AD		 854 scr_memsetw((void *)new_origin, vc->vc_video_erase_char,
855 new_scr_end - new_origin);
1da177e4
LT		 856 if (vc->vc_kmalloced)
857 kfree(vc->vc_screenbuf);
858 vc->vc_screenbuf = newscreen;
859 vc->vc_kmalloced = 1;
860 vc->vc_screenbuf_size = new_screen_size;
861 set_origin(vc);
862
863 /* do part of a reset_terminal() */
864 vc->vc_top = 0;
865 vc->vc_bottom = vc->vc_rows;
866 gotoxy(vc, vc->vc_x, vc->vc_y);
867 save_cur(vc);
868
869 if (vc->vc_tty) {
870 struct winsize ws, *cws = &vc->vc_tty->winsize;
871
872 memset(&ws, 0, sizeof(ws));
873 ws.ws_row = vc->vc_rows;
874 ws.ws_col = vc->vc_cols;
875 ws.ws_ypixel = vc->vc_scan_lines;
876 if ((ws.ws_row != cws->ws_row || ws.ws_col != cws->ws_col) &&
ab521dc0
EB		 877 vc->vc_tty->pgrp)
878 kill_pgrp(vc->vc_tty->pgrp, SIGWINCH, 1);
1da177e4
LT		 879 *cws = ws;
880 }
881
882 if (CON_IS_VISIBLE(vc))
883 update_screen(vc);
884 return err;
885}
886
ca9bda00
AC		 887int vc_lock_resize(struct vc_data *vc, unsigned int cols, unsigned int lines)
888{
889 int rc;
890
891 acquire_console_sem();
892 rc = vc_resize(vc, cols, lines);
893 release_console_sem();
894 return rc;
895}
1da177e4 896
ca9bda00 897void vc_deallocate(unsigned int currcons)
1da177e4
LT		 898{
899 WARN_CONSOLE_UNLOCKED();
900
901 if (vc_cons_allocated(currcons)) {
902 struct vc_data *vc = vc_cons[currcons].d;
903 vc->vc_sw->con_deinit(vc);
bde0d2c9 904 put_pid(vc->vt_pid);
d459ec0b 905 module_put(vc->vc_sw->owner);
1da177e4
LT		 906 if (vc->vc_kmalloced)
907 kfree(vc->vc_screenbuf);
908 if (currcons >= MIN_NR_CONSOLES)
909 kfree(vc);
910 vc_cons[currcons].d = NULL;
911 }
912}
913
914/*
915 * VT102 emulator
916 */
917
918#define set_kbd(vc, x) set_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
919#define clr_kbd(vc, x) clr_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
920#define is_kbd(vc, x) vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
921
922#define decarm VC_REPEAT
923#define decckm VC_CKMODE
924#define kbdapplic VC_APPLIC
925#define lnm VC_CRLF
926
927/*
928 * this is what the terminal answers to a ESC-Z or csi0c query.
929 */
930#define VT100ID "\033[?1;2c"
931#define VT102ID "\033[?6c"
932
933unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7,
934 8,12,10,14, 9,13,11,15 };
935
936/* the default colour table, for VGA+ colour systems */
937int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
938 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
939int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
940 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
941int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
942 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
943
1c2bbe6a
JE		 944module_param_array(default_red, int, NULL, S_IRUGO | S_IWUSR);
945module_param_array(default_grn, int, NULL, S_IRUGO | S_IWUSR);
946module_param_array(default_blu, int, NULL, S_IRUGO | S_IWUSR);
947
1da177e4
LT		 948/*
949 * gotoxy() must verify all boundaries, because the arguments
950 * might also be negative. If the given position is out of
951 * bounds, the cursor is placed at the nearest margin.
952 */
953static void gotoxy(struct vc_data *vc, int new_x, int new_y)
954{
955 int min_y, max_y;
956
957 if (new_x < 0)
958 vc->vc_x = 0;
959 else {
960 if (new_x >= vc->vc_cols)
961 vc->vc_x = vc->vc_cols - 1;
962 else
963 vc->vc_x = new_x;
964 }
965
966 if (vc->vc_decom) {
967 min_y = vc->vc_top;
968 max_y = vc->vc_bottom;
969 } else {
970 min_y = 0;
971 max_y = vc->vc_rows;
972 }
973 if (new_y < min_y)
974 vc->vc_y = min_y;
975 else if (new_y >= max_y)
976 vc->vc_y = max_y - 1;
977 else
978 vc->vc_y = new_y;
979 vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1);
980 vc->vc_need_wrap = 0;
981}
982
983/* for absolute user moves, when decom is set */
984static void gotoxay(struct vc_data *vc, int new_x, int new_y)
985{
986 gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y);
987}
988
989void scrollback(struct vc_data *vc, int lines)
990{
991 if (!lines)
992 lines = vc->vc_rows / 2;
993 scrolldelta(-lines);
994}
995
996void scrollfront(struct vc_data *vc, int lines)
997{
998 if (!lines)
999 lines = vc->vc_rows / 2;
1000 scrolldelta(lines);
1001}
1002
1003static void lf(struct vc_data *vc)
1004{
1005 /* don't scroll if above bottom of scrolling region, or
1006 * if below scrolling region
1007 */
1008 if (vc->vc_y + 1 == vc->vc_bottom)
1009 scrup(vc, vc->vc_top, vc->vc_bottom, 1);
1010 else if (vc->vc_y < vc->vc_rows - 1) {
1011 vc->vc_y++;
1012 vc->vc_pos += vc->vc_size_row;
1013 }
1014 vc->vc_need_wrap = 0;
1015}
1016
1017static void ri(struct vc_data *vc)
1018{
1019 /* don't scroll if below top of scrolling region, or
1020 * if above scrolling region
1021 */
1022 if (vc->vc_y == vc->vc_top)
1023 scrdown(vc, vc->vc_top, vc->vc_bottom, 1);
1024 else if (vc->vc_y > 0) {
1025 vc->vc_y--;
1026 vc->vc_pos -= vc->vc_size_row;
1027 }
1028 vc->vc_need_wrap = 0;
1029}
1030
1031static inline void cr(struct vc_data *vc)
1032{
1033 vc->vc_pos -= vc->vc_x << 1;
1034 vc->vc_need_wrap = vc->vc_x = 0;
1035}
1036
1037static inline void bs(struct vc_data *vc)
1038{
1039 if (vc->vc_x) {
1040 vc->vc_pos -= 2;
1041 vc->vc_x--;
1042 vc->vc_need_wrap = 0;
1043 }
1044}
1045
1046static inline void del(struct vc_data *vc)
1047{
1048 /* ignored */
1049}
1050
1051static void csi_J(struct vc_data *vc, int vpar)
1052{
1053 unsigned int count;
1054 unsigned short * start;
1055
1056 switch (vpar) {
1057 case 0: /* erase from cursor to end of display */
1058 count = (vc->vc_scr_end - vc->vc_pos) >> 1;
1059 start = (unsigned short *)vc->vc_pos;
1060 if (DO_UPDATE(vc)) {
1061 /* do in two stages */
1062 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1063 vc->vc_cols - vc->vc_x);
1064 vc->vc_sw->con_clear(vc, vc->vc_y + 1, 0,
1065 vc->vc_rows - vc->vc_y - 1,
1066 vc->vc_cols);
1067 }
1068 break;
1069 case 1: /* erase from start to cursor */
1070 count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1;
1071 start = (unsigned short *)vc->vc_origin;
1072 if (DO_UPDATE(vc)) {
1073 /* do in two stages */
1074 vc->vc_sw->con_clear(vc, 0, 0, vc->vc_y,
1075 vc->vc_cols);
1076 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1077 vc->vc_x + 1);
1078 }
1079 break;
1080 case 2: /* erase whole display */
1081 count = vc->vc_cols * vc->vc_rows;
1082 start = (unsigned short *)vc->vc_origin;
1083 if (DO_UPDATE(vc))
1084 vc->vc_sw->con_clear(vc, 0, 0,
1085 vc->vc_rows,
1086 vc->vc_cols);
1087 break;
1088 default:
1089 return;
1090 }
1091 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1092 vc->vc_need_wrap = 0;
1093}
1094
1095static void csi_K(struct vc_data *vc, int vpar)
1096{
1097 unsigned int count;
1098 unsigned short * start;
1099
1100 switch (vpar) {
1101 case 0: /* erase from cursor to end of line */
1102 count = vc->vc_cols - vc->vc_x;
1103 start = (unsigned short *)vc->vc_pos;
1104 if (DO_UPDATE(vc))
1105 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1106 vc->vc_cols - vc->vc_x);
1107 break;
1108 case 1: /* erase from start of line to cursor */
1109 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1110 count = vc->vc_x + 1;
1111 if (DO_UPDATE(vc))
1112 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1113 vc->vc_x + 1);
1114 break;
1115 case 2: /* erase whole line */
1116 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1117 count = vc->vc_cols;
1118 if (DO_UPDATE(vc))
1119 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1120 vc->vc_cols);
1121 break;
1122 default:
1123 return;
1124 }
1125 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1126 vc->vc_need_wrap = 0;
1127}
1128
1129static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */
1130{ /* not vt100? */
1131 int count;
1132
1133 if (!vpar)
1134 vpar++;
1135 count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar;
1136
1137 scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count);
1138 if (DO_UPDATE(vc))
1139 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count);
1140 vc->vc_need_wrap = 0;
1141}
1142
1143static void default_attr(struct vc_data *vc)
1144{
1145 vc->vc_intensity = 1;
fa6ce9ab 1146 vc->vc_italic = 0;
1da177e4
LT		 1147 vc->vc_underline = 0;
1148 vc->vc_reverse = 0;
1149 vc->vc_blink = 0;
1150 vc->vc_color = vc->vc_def_color;
1151}
1152
1153/* console_sem is held */
1154static void csi_m(struct vc_data *vc)
1155{
1156 int i;
1157
1158 for (i = 0; i <= vc->vc_npar; i++)
1159 switch (vc->vc_par[i]) {
1160 case 0: /* all attributes off */
1161 default_attr(vc);
1162 break;
1163 case 1:
1164 vc->vc_intensity = 2;
1165 break;
1166 case 2:
1167 vc->vc_intensity = 0;
1168 break;
fa6ce9ab
JE		 1169 case 3:
1170 vc->vc_italic = 1;
1171 break;
1da177e4
LT		 1172 case 4:
1173 vc->vc_underline = 1;
1174 break;
1175 case 5:
1176 vc->vc_blink = 1;
1177 break;
1178 case 7:
1179 vc->vc_reverse = 1;
1180 break;
1181 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1182 * Select primary font, don't display
1183 * control chars if defined, don't set
1184 * bit 8 on output.
1185 */
1186 vc->vc_translate = set_translate(vc->vc_charset == 0
1187 ? vc->vc_G0_charset
1188 : vc->vc_G1_charset, vc);
1189 vc->vc_disp_ctrl = 0;
1190 vc->vc_toggle_meta = 0;
1191 break;
1192 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1193 * Select first alternate font, lets
1194 * chars < 32 be displayed as ROM chars.
1195 */
1196 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1197 vc->vc_disp_ctrl = 1;
1198 vc->vc_toggle_meta = 0;
1199 break;
1200 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1201 * Select second alternate font, toggle
1202 * high bit before displaying as ROM char.
1203 */
1204 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1205 vc->vc_disp_ctrl = 1;
1206 vc->vc_toggle_meta = 1;
1207 break;
1208 case 21:
1209 case 22:
1210 vc->vc_intensity = 1;
1211 break;
fa6ce9ab
JE		 1212 case 23:
1213 vc->vc_italic = 0;
1214 break;
1da177e4
LT		 1215 case 24:
1216 vc->vc_underline = 0;
1217 break;
1218 case 25:
1219 vc->vc_blink = 0;
1220 break;
1221 case 27:
1222 vc->vc_reverse = 0;
1223 break;
1224 case 38: /* ANSI X3.64-1979 (SCO-ish?)
1225 * Enables underscore, white foreground
1226 * with white underscore (Linux - use
1227 * default foreground).
1228 */
1229 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1230 vc->vc_underline = 1;
1231 break;
1232 case 39: /* ANSI X3.64-1979 (SCO-ish?)
1233 * Disable underline option.
1234 * Reset colour to default? It did this
1235 * before...
1236 */
1237 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1238 vc->vc_underline = 0;
1239 break;
1240 case 49:
1241 vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f);
1242 break;
1243 default:
1244 if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37)
1245 vc->vc_color = color_table[vc->vc_par[i] - 30]
1246 | (vc->vc_color & 0xf0);
1247 else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47)
1248 vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4)
1249 | (vc->vc_color & 0x0f);
1250 break;
1251 }
1252 update_attr(vc);
1253}
1254
1255static void respond_string(const char *p, struct tty_struct *tty)
1256{
1257 while (*p) {
1258 tty_insert_flip_char(tty, *p, 0);
1259 p++;
1260 }
1261 con_schedule_flip(tty);
1262}
1263
1264static void cursor_report(struct vc_data *vc, struct tty_struct *tty)
1265{
1266 char buf[40];
1267
1268 sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1);
1269 respond_string(buf, tty);
1270}
1271
1272static inline void status_report(struct tty_struct *tty)
1273{
1274 respond_string("\033[0n", tty); /* Terminal ok */
1275}
1276
1277static inline void respond_ID(struct tty_struct * tty)
1278{
1279 respond_string(VT102ID, tty);
1280}
1281
1282void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry)
1283{
1284 char buf[8];
1285
1286 sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx),
1287 (char)('!' + mry));
1288 respond_string(buf, tty);
1289}
1290
1291/* invoked via ioctl(TIOCLINUX) and through set_selection */
1292int mouse_reporting(void)
1293{
1294 return vc_cons[fg_console].d->vc_report_mouse;
1295}
1296
1297/* console_sem is held */
1298static void set_mode(struct vc_data *vc, int on_off)
1299{
1300 int i;
1301
1302 for (i = 0; i <= vc->vc_npar; i++)
1303 if (vc->vc_ques) {
1304 switch(vc->vc_par[i]) { /* DEC private modes set/reset */
1305 case 1: /* Cursor keys send ^[Ox/^[[x */
1306 if (on_off)
1307 set_kbd(vc, decckm);
1308 else
1309 clr_kbd(vc, decckm);
1310 break;
1311 case 3: /* 80/132 mode switch unimplemented */
1312 vc->vc_deccolm = on_off;
1313#if 0
1314 vc_resize(deccolm ? 132 : 80, vc->vc_rows);
1315 /* this alone does not suffice; some user mode
1316 utility has to change the hardware regs */
1317#endif
1318 break;
1319 case 5: /* Inverted screen on/off */
1320 if (vc->vc_decscnm != on_off) {
1321 vc->vc_decscnm = on_off;
1322 invert_screen(vc, 0, vc->vc_screenbuf_size, 0);
1323 update_attr(vc);
1324 }
1325 break;
1326 case 6: /* Origin relative/absolute */
1327 vc->vc_decom = on_off;
1328 gotoxay(vc, 0, 0);
1329 break;
1330 case 7: /* Autowrap on/off */
1331 vc->vc_decawm = on_off;
1332 break;
1333 case 8: /* Autorepeat on/off */
1334 if (on_off)
1335 set_kbd(vc, decarm);
1336 else
1337 clr_kbd(vc, decarm);
1338 break;
1339 case 9:
1340 vc->vc_report_mouse = on_off ? 1 : 0;
1341 break;
1342 case 25: /* Cursor on/off */
1343 vc->vc_deccm = on_off;
1344 break;
1345 case 1000:
1346 vc->vc_report_mouse = on_off ? 2 : 0;
1347 break;
1348 }
1349 } else {
1350 switch(vc->vc_par[i]) { /* ANSI modes set/reset */
1351 case 3: /* Monitor (display ctrls) */
1352 vc->vc_disp_ctrl = on_off;
1353 break;
1354 case 4: /* Insert Mode on/off */
1355 vc->vc_decim = on_off;
1356 break;
1357 case 20: /* Lf, Enter == CrLf/Lf */
1358 if (on_off)
1359 set_kbd(vc, lnm);
1360 else
1361 clr_kbd(vc, lnm);
1362 break;
1363 }
1364 }
1365}
1366
1367/* console_sem is held */
1368static void setterm_command(struct vc_data *vc)
1369{
1370 switch(vc->vc_par[0]) {
1371 case 1: /* set color for underline mode */
1372 if (vc->vc_can_do_color &&
1373 vc->vc_par[1] < 16) {
1374 vc->vc_ulcolor = color_table[vc->vc_par[1]];
1375 if (vc->vc_underline)
1376 update_attr(vc);
1377 }
1378 break;
1379 case 2: /* set color for half intensity mode */
1380 if (vc->vc_can_do_color &&
1381 vc->vc_par[1] < 16) {
1382 vc->vc_halfcolor = color_table[vc->vc_par[1]];
1383 if (vc->vc_intensity == 0)
1384 update_attr(vc);
1385 }
1386 break;
1387 case 8: /* store colors as defaults */
1388 vc->vc_def_color = vc->vc_attr;
1389 if (vc->vc_hi_font_mask == 0x100)
1390 vc->vc_def_color >>= 1;
1391 default_attr(vc);
1392 update_attr(vc);
1393 break;
1394 case 9: /* set blanking interval */
1395 blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1396 poke_blanked_console();
1397 break;
1398 case 10: /* set bell frequency in Hz */
1399 if (vc->vc_npar >= 1)
1400 vc->vc_bell_pitch = vc->vc_par[1];
1401 else
1402 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1403 break;
1404 case 11: /* set bell duration in msec */
1405 if (vc->vc_npar >= 1)
1406 vc->vc_bell_duration = (vc->vc_par[1] < 2000) ?
1407 vc->vc_par[1] * HZ / 1000 : 0;
1408 else
1409 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1410 break;
1411 case 12: /* bring specified console to the front */
1412 if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1))
1413 set_console(vc->vc_par[1] - 1);
1414 break;
1415 case 13: /* unblank the screen */
1416 poke_blanked_console();
1417 break;
1418 case 14: /* set vesa powerdown interval */
1419 vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1420 break;
1421 case 15: /* activate the previous console */
1422 set_console(last_console);
1423 break;
1424 }
1425}
1426
1427/* console_sem is held */
1428static void csi_at(struct vc_data *vc, unsigned int nr)
1429{
1430 if (nr > vc->vc_cols - vc->vc_x)
1431 nr = vc->vc_cols - vc->vc_x;
1432 else if (!nr)
1433 nr = 1;
1434 insert_char(vc, nr);
1435}
1436
1437/* console_sem is held */
1438static void csi_L(struct vc_data *vc, unsigned int nr)
1439{
1440 if (nr > vc->vc_rows - vc->vc_y)
1441 nr = vc->vc_rows - vc->vc_y;
1442 else if (!nr)
1443 nr = 1;
1444 scrdown(vc, vc->vc_y, vc->vc_bottom, nr);
1445 vc->vc_need_wrap = 0;
1446}
1447
1448/* console_sem is held */
1449static void csi_P(struct vc_data *vc, unsigned int nr)
1450{
1451 if (nr > vc->vc_cols - vc->vc_x)
1452 nr = vc->vc_cols - vc->vc_x;
1453 else if (!nr)
1454 nr = 1;
1455 delete_char(vc, nr);
1456}
1457
1458/* console_sem is held */
1459static void csi_M(struct vc_data *vc, unsigned int nr)
1460{
1461 if (nr > vc->vc_rows - vc->vc_y)
1462 nr = vc->vc_rows - vc->vc_y;
1463 else if (!nr)
1464 nr=1;
1465 scrup(vc, vc->vc_y, vc->vc_bottom, nr);
1466 vc->vc_need_wrap = 0;
1467}
1468
1469/* console_sem is held (except via vc_init->reset_terminal */
1470static void save_cur(struct vc_data *vc)
1471{
1472 vc->vc_saved_x = vc->vc_x;
1473 vc->vc_saved_y = vc->vc_y;
1474 vc->vc_s_intensity = vc->vc_intensity;
fa6ce9ab 1475 vc->vc_s_italic = vc->vc_italic;
1da177e4
LT		 1476 vc->vc_s_underline = vc->vc_underline;
1477 vc->vc_s_blink = vc->vc_blink;
1478 vc->vc_s_reverse = vc->vc_reverse;
1479 vc->vc_s_charset = vc->vc_charset;
1480 vc->vc_s_color = vc->vc_color;
1481 vc->vc_saved_G0 = vc->vc_G0_charset;
1482 vc->vc_saved_G1 = vc->vc_G1_charset;
1483}
1484
1485/* console_sem is held */
1486static void restore_cur(struct vc_data *vc)
1487{
1488 gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y);
1489 vc->vc_intensity = vc->vc_s_intensity;
fa6ce9ab 1490 vc->vc_italic = vc->vc_s_italic;
1da177e4
LT		 1491 vc->vc_underline = vc->vc_s_underline;
1492 vc->vc_blink = vc->vc_s_blink;
1493 vc->vc_reverse = vc->vc_s_reverse;
1494 vc->vc_charset = vc->vc_s_charset;
1495 vc->vc_color = vc->vc_s_color;
1496 vc->vc_G0_charset = vc->vc_saved_G0;
1497 vc->vc_G1_charset = vc->vc_saved_G1;
1498 vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc);
1499 update_attr(vc);
1500 vc->vc_need_wrap = 0;
1501}
1502
1503enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey,
1504 EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd,
1505 ESpalette };
1506
1507/* console_sem is held (except via vc_init()) */
1508static void reset_terminal(struct vc_data *vc, int do_clear)
1509{
1510 vc->vc_top = 0;
1511 vc->vc_bottom = vc->vc_rows;
1512 vc->vc_state = ESnormal;
1513 vc->vc_ques = 0;
1514 vc->vc_translate = set_translate(LAT1_MAP, vc);
1515 vc->vc_G0_charset = LAT1_MAP;
1516 vc->vc_G1_charset = GRAF_MAP;
1517 vc->vc_charset = 0;
1518 vc->vc_need_wrap = 0;
1519 vc->vc_report_mouse = 0;
1520 vc->vc_utf = 0;
1521 vc->vc_utf_count = 0;
1522
1523 vc->vc_disp_ctrl = 0;
1524 vc->vc_toggle_meta = 0;
1525
1526 vc->vc_decscnm = 0;
1527 vc->vc_decom = 0;
1528 vc->vc_decawm = 1;
1529 vc->vc_deccm = 1;
1530 vc->vc_decim = 0;
1531
1532 set_kbd(vc, decarm);
1533 clr_kbd(vc, decckm);
1534 clr_kbd(vc, kbdapplic);
1535 clr_kbd(vc, lnm);
1536 kbd_table[vc->vc_num].lockstate = 0;
1537 kbd_table[vc->vc_num].slockstate = 0;
1538 kbd_table[vc->vc_num].ledmode = LED_SHOW_FLAGS;
1539 kbd_table[vc->vc_num].ledflagstate = kbd_table[vc->vc_num].default_ledflagstate;
1540 /* do not do set_leds here because this causes an endless tasklet loop
1541 when the keyboard hasn't been initialized yet */
1542
1543 vc->vc_cursor_type = CUR_DEFAULT;
1544 vc->vc_complement_mask = vc->vc_s_complement_mask;
1545
1546 default_attr(vc);
1547 update_attr(vc);
1548
1549 vc->vc_tab_stop[0] = 0x01010100;
1550 vc->vc_tab_stop[1] =
1551 vc->vc_tab_stop[2] =
1552 vc->vc_tab_stop[3] =
1553 vc->vc_tab_stop[4] = 0x01010101;
1554
1555 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1556 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1557
1558 gotoxy(vc, 0, 0);
1559 save_cur(vc);
1560 if (do_clear)
1561 csi_J(vc, 2);
1562}
1563
1564/* console_sem is held */
1565static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
1566{
1567 /*
1568 * Control characters can be used in the _middle_
1569 * of an escape sequence.
1570 */
1571 switch (c) {
1572 case 0:
1573 return;
1574 case 7:
1575 if (vc->vc_bell_duration)
1576 kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration);
1577 return;
1578 case 8:
1579 bs(vc);
1580 return;
1581 case 9:
1582 vc->vc_pos -= (vc->vc_x << 1);
1583 while (vc->vc_x < vc->vc_cols - 1) {
1584 vc->vc_x++;
1585 if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31)))
1586 break;
1587 }
1588 vc->vc_pos += (vc->vc_x << 1);
1589 return;
1590 case 10: case 11: case 12:
1591 lf(vc);
1592 if (!is_kbd(vc, lnm))
1593 return;
1594 case 13:
1595 cr(vc);
1596 return;
1597 case 14:
1598 vc->vc_charset = 1;
1599 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1600 vc->vc_disp_ctrl = 1;
1601 return;
1602 case 15:
1603 vc->vc_charset = 0;
1604 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1605 vc->vc_disp_ctrl = 0;
1606 return;
1607 case 24: case 26:
1608 vc->vc_state = ESnormal;
1609 return;
1610 case 27:
1611 vc->vc_state = ESesc;
1612 return;
1613 case 127:
1614 del(vc);
1615 return;
1616 case 128+27:
1617 vc->vc_state = ESsquare;
1618 return;
1619 }
1620 switch(vc->vc_state) {
1621 case ESesc:
1622 vc->vc_state = ESnormal;
1623 switch (c) {
1624 case '[':
1625 vc->vc_state = ESsquare;
1626 return;
1627 case ']':
1628 vc->vc_state = ESnonstd;
1629 return;
1630 case '%':
1631 vc->vc_state = ESpercent;
1632 return;
1633 case 'E':
1634 cr(vc);
1635 lf(vc);
1636 return;
1637 case 'M':
1638 ri(vc);
1639 return;
1640 case 'D':
1641 lf(vc);
1642 return;
1643 case 'H':
1644 vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31));
1645 return;
1646 case 'Z':
1647 respond_ID(tty);
1648 return;
1649 case '7':
1650 save_cur(vc);
1651 return;
1652 case '8':
1653 restore_cur(vc);
1654 return;
1655 case '(':
1656 vc->vc_state = ESsetG0;
1657 return;
1658 case ')':
1659 vc->vc_state = ESsetG1;
1660 return;
1661 case '#':
1662 vc->vc_state = EShash;
1663 return;
1664 case 'c':
1665 reset_terminal(vc, 1);
1666 return;
1667 case '>': /* Numeric keypad */
1668 clr_kbd(vc, kbdapplic);
1669 return;
1670 case '=': /* Appl. keypad */
1671 set_kbd(vc, kbdapplic);
1672 return;
1673 }
1674 return;
1675 case ESnonstd:
1676 if (c=='P') { /* palette escape sequence */
1677 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1678 vc->vc_par[vc->vc_npar] = 0;
1679 vc->vc_npar = 0;
1680 vc->vc_state = ESpalette;
1681 return;
1682 } else if (c=='R') { /* reset palette */
1683 reset_palette(vc);
1684 vc->vc_state = ESnormal;
1685 } else
1686 vc->vc_state = ESnormal;
1687 return;
1688 case ESpalette:
1689 if ( (c>='0'&&c<='9') || (c>='A'&&c<='F') || (c>='a'&&c<='f') ) {
1690 vc->vc_par[vc->vc_npar++] = (c > '9' ? (c & 0xDF) - 'A' + 10 : c - '0');
1691 if (vc->vc_npar == 7) {
1692 int i = vc->vc_par[0] * 3, j = 1;
1693 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1694 vc->vc_palette[i++] += vc->vc_par[j++];
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 set_palette(vc);
1700 vc->vc_state = ESnormal;
1701 }
1702 } else
1703 vc->vc_state = ESnormal;
1704 return;
1705 case ESsquare:
1706 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1707 vc->vc_par[vc->vc_npar] = 0;
1708 vc->vc_npar = 0;
1709 vc->vc_state = ESgetpars;
1710 if (c == '[') { /* Function key */
1711 vc->vc_state=ESfunckey;
1712 return;
1713 }
1714 vc->vc_ques = (c == '?');
1715 if (vc->vc_ques)
1716 return;
1717 case ESgetpars:
1718 if (c == ';' && vc->vc_npar < NPAR - 1) {
1719 vc->vc_npar++;
1720 return;
1721 } else if (c>='0' && c<='9') {
1722 vc->vc_par[vc->vc_npar] *= 10;
1723 vc->vc_par[vc->vc_npar] += c - '0';
1724 return;
1725 } else
1726 vc->vc_state = ESgotpars;
1727 case ESgotpars:
1728 vc->vc_state = ESnormal;
1729 switch(c) {
1730 case 'h':
1731 set_mode(vc, 1);
1732 return;
1733 case 'l':
1734 set_mode(vc, 0);
1735 return;
1736 case 'c':
1737 if (vc->vc_ques) {
1738 if (vc->vc_par[0])
1739 vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16);
1740 else
1741 vc->vc_cursor_type = CUR_DEFAULT;
1742 return;
1743 }
1744 break;
1745 case 'm':
1746 if (vc->vc_ques) {
1747 clear_selection();
1748 if (vc->vc_par[0])
1749 vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1];
1750 else
1751 vc->vc_complement_mask = vc->vc_s_complement_mask;
1752 return;
1753 }
1754 break;
1755 case 'n':
1756 if (!vc->vc_ques) {
1757 if (vc->vc_par[0] == 5)
1758 status_report(tty);
1759 else if (vc->vc_par[0] == 6)
1760 cursor_report(vc, tty);
1761 }
1762 return;
1763 }
1764 if (vc->vc_ques) {
1765 vc->vc_ques = 0;
1766 return;
1767 }
1768 switch(c) {
1769 case 'G': case '`':
1770 if (vc->vc_par[0])
1771 vc->vc_par[0]--;
1772 gotoxy(vc, vc->vc_par[0], vc->vc_y);
1773 return;
1774 case 'A':
1775 if (!vc->vc_par[0])
1776 vc->vc_par[0]++;
1777 gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]);
1778 return;
1779 case 'B': case 'e':
1780 if (!vc->vc_par[0])
1781 vc->vc_par[0]++;
1782 gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]);
1783 return;
1784 case 'C': case 'a':
1785 if (!vc->vc_par[0])
1786 vc->vc_par[0]++;
1787 gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y);
1788 return;
1789 case 'D':
1790 if (!vc->vc_par[0])
1791 vc->vc_par[0]++;
1792 gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y);
1793 return;
1794 case 'E':
1795 if (!vc->vc_par[0])
1796 vc->vc_par[0]++;
1797 gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]);
1798 return;
1799 case 'F':
1800 if (!vc->vc_par[0])
1801 vc->vc_par[0]++;
1802 gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]);
1803 return;
1804 case 'd':
1805 if (vc->vc_par[0])
1806 vc->vc_par[0]--;
1807 gotoxay(vc, vc->vc_x ,vc->vc_par[0]);
1808 return;
1809 case 'H': case 'f':
1810 if (vc->vc_par[0])
1811 vc->vc_par[0]--;
1812 if (vc->vc_par[1])
1813 vc->vc_par[1]--;
1814 gotoxay(vc, vc->vc_par[1], vc->vc_par[0]);
1815 return;
1816 case 'J':
1817 csi_J(vc, vc->vc_par[0]);
1818 return;
1819 case 'K':
1820 csi_K(vc, vc->vc_par[0]);
1821 return;
1822 case 'L':
1823 csi_L(vc, vc->vc_par[0]);
1824 return;
1825 case 'M':
1826 csi_M(vc, vc->vc_par[0]);
1827 return;
1828 case 'P':
1829 csi_P(vc, vc->vc_par[0]);
1830 return;
1831 case 'c':
1832 if (!vc->vc_par[0])
1833 respond_ID(tty);
1834 return;
1835 case 'g':
1836 if (!vc->vc_par[0])
1837 vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31));
1838 else if (vc->vc_par[0] == 3) {
1839 vc->vc_tab_stop[0] =
1840 vc->vc_tab_stop[1] =
1841 vc->vc_tab_stop[2] =
1842 vc->vc_tab_stop[3] =
1843 vc->vc_tab_stop[4] = 0;
1844 }
1845 return;
1846 case 'm':
1847 csi_m(vc);
1848 return;
1849 case 'q': /* DECLL - but only 3 leds */
1850 /* map 0,1,2,3 to 0,1,2,4 */
1851 if (vc->vc_par[0] < 4)
1852 setledstate(kbd_table + vc->vc_num,
1853 (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4);
1854 return;
1855 case 'r':
1856 if (!vc->vc_par[0])
1857 vc->vc_par[0]++;
1858 if (!vc->vc_par[1])
1859 vc->vc_par[1] = vc->vc_rows;
1860 /* Minimum allowed region is 2 lines */
1861 if (vc->vc_par[0] < vc->vc_par[1] &&
1862 vc->vc_par[1] <= vc->vc_rows) {
1863 vc->vc_top = vc->vc_par[0] - 1;
1864 vc->vc_bottom = vc->vc_par[1];
1865 gotoxay(vc, 0, 0);
1866 }
1867 return;
1868 case 's':
1869 save_cur(vc);
1870 return;
1871 case 'u':
1872 restore_cur(vc);
1873 return;
1874 case 'X':
1875 csi_X(vc, vc->vc_par[0]);
1876 return;
1877 case '@':
1878 csi_at(vc, vc->vc_par[0]);
1879 return;
1880 case ']': /* setterm functions */
1881 setterm_command(vc);
1882 return;
1883 }
1884 return;
1885 case ESpercent:
1886 vc->vc_state = ESnormal;
1887 switch (c) {
1888 case '@': /* defined in ISO 2022 */
1889 vc->vc_utf = 0;
1890 return;
1891 case 'G': /* prelim official escape code */
1892 case '8': /* retained for compatibility */
1893 vc->vc_utf = 1;
1894 return;
1895 }
1896 return;
1897 case ESfunckey:
1898 vc->vc_state = ESnormal;
1899 return;
1900 case EShash:
1901 vc->vc_state = ESnormal;
1902 if (c == '8') {
1903 /* DEC screen alignment test. kludge :-) */
1904 vc->vc_video_erase_char =
1905 (vc->vc_video_erase_char & 0xff00) | 'E';
1906 csi_J(vc, 2);
1907 vc->vc_video_erase_char =
1908 (vc->vc_video_erase_char & 0xff00) | ' ';
1909 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
1910 }
1911 return;
1912 case ESsetG0:
1913 if (c == '0')
1914 vc->vc_G0_charset = GRAF_MAP;
1915 else if (c == 'B')
1916 vc->vc_G0_charset = LAT1_MAP;
1917 else if (c == 'U')
1918 vc->vc_G0_charset = IBMPC_MAP;
1919 else if (c == 'K')
1920 vc->vc_G0_charset = USER_MAP;
1921 if (vc->vc_charset == 0)
1922 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1923 vc->vc_state = ESnormal;
1924 return;
1925 case ESsetG1:
1926 if (c == '0')
1927 vc->vc_G1_charset = GRAF_MAP;
1928 else if (c == 'B')
1929 vc->vc_G1_charset = LAT1_MAP;
1930 else if (c == 'U')
1931 vc->vc_G1_charset = IBMPC_MAP;
1932 else if (c == 'K')
1933 vc->vc_G1_charset = USER_MAP;
1934 if (vc->vc_charset == 1)
1935 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1936 vc->vc_state = ESnormal;
1937 return;
1938 default:
1939 vc->vc_state = ESnormal;
1940 }
1941}
1942
1943/* This is a temporary buffer used to prepare a tty console write
1944 * so that we can easily avoid touching user space while holding the
1945 * console spinlock. It is allocated in con_init and is shared by
1946 * this code and the vc_screen read/write tty calls.
1947 *
1948 * We have to allocate this statically in the kernel data section
1949 * since console_init (and thus con_init) are called before any
1950 * kernel memory allocation is available.
1951 */
1952char con_buf[CON_BUF_SIZE];
1953DECLARE_MUTEX(con_buf_sem);
1954
2f1a2ccb
EK		 1955/* is_double_width() is based on the wcwidth() implementation by
1956 * Markus Kuhn -- 2003-05-20 (Unicode 4.0)
1957 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
1958 */
1959struct interval {
1960 uint32_t first;
1961 uint32_t last;
1962};
1963
1964static int bisearch(uint32_t ucs, const struct interval *table, int max)
1965{
1966 int min = 0;
1967 int mid;
1968
1969 if (ucs < table[0].first || ucs > table[max].last)
1970 return 0;
1971 while (max >= min) {
1972 mid = (min + max) / 2;
1973 if (ucs > table[mid].last)
1974 min = mid + 1;
1975 else if (ucs < table[mid].first)
1976 max = mid - 1;
1977 else
1978 return 1;
1979 }
1980 return 0;
1981}
1982
1983static int is_double_width(uint32_t ucs)
1984{
1985 static const struct interval double_width[] = {
1986 { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E },
1987 { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF },
1988 { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 }, { 0xFFE0, 0xFFE6 },
1989 { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD }
1990 };
1991 return bisearch(ucs, double_width,
1992 sizeof(double_width) / sizeof(*double_width) - 1);
1993}
1994
1da177e4
LT		 1995/* acquires console_sem */
1996static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count)
1997{
1998#ifdef VT_BUF_VRAM_ONLY
1999#define FLUSH do { } while(0);
2000#else
2001#define FLUSH if (draw_x >= 0) { \
2002 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
2003 draw_x = -1; \
2004 }
2005#endif
2006
2007 int c, tc, ok, n = 0, draw_x = -1;
2008 unsigned int currcons;
2009 unsigned long draw_from = 0, draw_to = 0;
2010 struct vc_data *vc;
2f1a2ccb
EK		 2011 unsigned char vc_attr;
2012 uint8_t rescan;
2013 uint8_t inverse;
2014 uint8_t width;
1da177e4
LT		 2015 u16 himask, charmask;
2016 const unsigned char *orig_buf = NULL;
2017 int orig_count;
2018
2019 if (in_interrupt())
2020 return count;
2021
2022 might_sleep();
2023
2024 acquire_console_sem();
2025 vc = tty->driver_data;
2026 if (vc == NULL) {
2027 printk(KERN_ERR "vt: argh, driver_data is NULL !\n");
2028 release_console_sem();
2029 return 0;
2030 }
2031
2032 currcons = vc->vc_num;
2033 if (!vc_cons_allocated(currcons)) {
2034 /* could this happen? */
2035 static int error = 0;
2036 if (!error) {
2037 error = 1;
2038 printk("con_write: tty %d not allocated\n", currcons+1);
2039 }
2040 release_console_sem();
2041 return 0;
2042 }
2043 release_console_sem();
2044
2045 orig_buf = buf;
2046 orig_count = count;
2047
2048 /* At this point 'buf' is guaranteed to be a kernel buffer
2049 * and therefore no access to userspace (and therefore sleeping)
2050 * will be needed. The con_buf_sem serializes all tty based
2051 * console rendering and vcs write/read operations. We hold
2052 * the console spinlock during the entire write.
2053 */
2054
2055 acquire_console_sem();
2056
2057 vc = tty->driver_data;
2058 if (vc == NULL) {
2059 printk(KERN_ERR "vt: argh, driver_data _became_ NULL !\n");
2060 release_console_sem();
2061 goto out;
2062 }
2063
2064 himask = vc->vc_hi_font_mask;
2065 charmask = himask ? 0x1ff : 0xff;
2066
2067 /* undraw cursor first */
2068 if (IS_FG(vc))
2069 hide_cursor(vc);
2070
2071 while (!tty->stopped && count) {
2072 int orig = *buf;
2073 c = orig;
2074 buf++;
2075 n++;
2076 count--;
2f1a2ccb
EK		 2077 rescan = 0;
2078 inverse = 0;
2079 width = 1;
1da177e4
LT		 2080
2081 /* Do no translation at all in control states */
2082 if (vc->vc_state != ESnormal) {
2083 tc = c;
d4328b40 2084 } else if (vc->vc_utf && !vc->vc_disp_ctrl) {
2f1a2ccb
EK		 2085 /* Combine UTF-8 into Unicode in vc_utf_char.
2086 * vc_utf_count is the number of continuation bytes still
2087 * expected to arrive.
2088 * vc_npar is the number of continuation bytes arrived so
2089 * far
2090 */
d4328b40 2091rescan_last_byte:
2f1a2ccb
EK		 2092 if ((c & 0xc0) == 0x80) {
2093 /* Continuation byte received */
2094 static const uint32_t utf8_length_changes[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff };
d4328b40 2095 if (vc->vc_utf_count) {
2f1a2ccb
EK		 2096 vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f);
2097 vc->vc_npar++;
2098 if (--vc->vc_utf_count) {
2099 /* Still need some bytes */
1da177e4 2100 continue;
2f1a2ccb
EK		 2101 }
2102 /* Got a whole character */
2103 c = vc->vc_utf_char;
2104 /* Reject overlong sequences */
2105 if (c <= utf8_length_changes[vc->vc_npar - 1] ||
2106 c > utf8_length_changes[vc->vc_npar])
2107 c = 0xfffd;
2108 } else {
2109 /* Unexpected continuation byte */
2110 vc->vc_utf_count = 0;
2111 c = 0xfffd;
2112 }
1da177e4 2113 } else {
2f1a2ccb
EK		 2114 /* Single ASCII byte or first byte of a sequence received */
2115 if (vc->vc_utf_count) {
2116 /* Continuation byte expected */
2117 rescan = 1;
2118 vc->vc_utf_count = 0;
2119 c = 0xfffd;
2120 } else if (c > 0x7f) {
2121 /* First byte of a multibyte sequence received */
2122 vc->vc_npar = 0;
2123 if ((c & 0xe0) == 0xc0) {
2124 vc->vc_utf_count = 1;
2125 vc->vc_utf_char = (c & 0x1f);
2126 } else if ((c & 0xf0) == 0xe0) {
2127 vc->vc_utf_count = 2;
2128 vc->vc_utf_char = (c & 0x0f);
2129 } else if ((c & 0xf8) == 0xf0) {
2130 vc->vc_utf_count = 3;
2131 vc->vc_utf_char = (c & 0x07);
2132 } else if ((c & 0xfc) == 0xf8) {
2133 vc->vc_utf_count = 4;
2134 vc->vc_utf_char = (c & 0x03);
2135 } else if ((c & 0xfe) == 0xfc) {
2136 vc->vc_utf_count = 5;
2137 vc->vc_utf_char = (c & 0x01);
2138 } else {
2139 /* 254 and 255 are invalid */
2140 c = 0xfffd;
2141 }
2142 if (vc->vc_utf_count) {
2143 /* Still need some bytes */
2144 continue;
2145 }
2146 }
2147 /* Nothing to do if an ASCII byte was received */
1da177e4 2148 }
2f1a2ccb
EK		 2149 /* End of UTF-8 decoding. */
2150 /* c is the received character, or U+FFFD for invalid sequences. */
2151 /* Replace invalid Unicode code points with U+FFFD too */
2152 if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff)
2153 c = 0xfffd;
2154 tc = c;
d4328b40 2155 } else { /* no utf or alternate charset mode */
2f1a2ccb 2156 tc = vc->vc_translate[vc->vc_toggle_meta ? (c | 0x80) : c];
1da177e4
LT		 2157 }
2158
2159 /* If the original code was a control character we
2160 * only allow a glyph to be displayed if the code is
2161 * not normally used (such as for cursor movement) or
2162 * if the disp_ctrl mode has been explicitly enabled.
2163 * Certain characters (as given by the CTRL_ALWAYS
2164 * bitmap) are always displayed as control characters,
2165 * as the console would be pretty useless without
2166 * them; to display an arbitrary font position use the
2167 * direct-to-font zone in UTF-8 mode.
2168 */
2169 ok = tc && (c >= 32 ||
d4328b40
AT		 2170 !(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 :
2171 vc->vc_utf || ((CTRL_ACTION >> c) & 1)))
1da177e4
LT		 2172 && (c != 127 || vc->vc_disp_ctrl)
2173 && (c != 128+27);
2174
2175 if (vc->vc_state == ESnormal && ok) {
2f1a2ccb
EK		 2176 if (vc->vc_utf && !vc->vc_disp_ctrl) {
2177 if (is_double_width(c))
2178 width = 2;
2179 }
1da177e4
LT		 2180 /* Now try to find out how to display it */
2181 tc = conv_uni_to_pc(vc, tc);
d4328b40 2182 if (tc & ~charmask) {
2f1a2ccb
EK		 2183 if (tc == -1 || tc == -2) {
2184 continue; /* nothing to display */
2185 }
2186 /* Glyph not found */
2187 if (!(vc->vc_utf && !vc->vc_disp_ctrl) && !(c & ~charmask)) {
2188 /* In legacy mode use the glyph we get by a 1:1 mapping.
2189 This would make absolutely no sense with Unicode in mind. */
2190 tc = c;
2191 } else {
2192 /* Display U+FFFD. If it's not found, display an inverse question mark. */
2193 tc = conv_uni_to_pc(vc, 0xfffd);
2194 if (tc < 0) {
2195 inverse = 1;
2196 tc = conv_uni_to_pc(vc, '?');
2197 if (tc < 0) tc = '?';
2198 }
2199 }
d4328b40 2200 }
1da177e4 2201
2f1a2ccb
EK		 2202 if (!inverse) {
2203 vc_attr = vc->vc_attr;
1da177e4 2204 } else {
2f1a2ccb
EK		 2205 /* invert vc_attr */
2206 if (!vc->vc_can_do_color) {
2207 vc_attr = (vc->vc_attr) ^ 0x08;
2208 } else if (vc->vc_hi_font_mask == 0x100) {
2209 vc_attr = ((vc->vc_attr) & 0x11) | (((vc->vc_attr) & 0xe0) >> 4) | (((vc->vc_attr) & 0x0e) << 4);
2210 } else {
2211 vc_attr = ((vc->vc_attr) & 0x88) | (((vc->vc_attr) & 0x70) >> 4) | (((vc->vc_attr) & 0x07) << 4);
2212 }
1da177e4 2213 }
2f1a2ccb
EK		 2214
2215 while (1) {
2216 if (vc->vc_need_wrap || vc->vc_decim)
2217 FLUSH
2218 if (vc->vc_need_wrap) {
2219 cr(vc);
2220 lf(vc);
2221 }
2222 if (vc->vc_decim)
2223 insert_char(vc, 1);
2224 scr_writew(himask ?
2225 ((vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) :
2226 (vc_attr << 8) + tc,
2227 (u16 *) vc->vc_pos);
2228 if (DO_UPDATE(vc) && draw_x < 0) {
2229 draw_x = vc->vc_x;
2230 draw_from = vc->vc_pos;
2231 }
2232 if (vc->vc_x == vc->vc_cols - 1) {
2233 vc->vc_need_wrap = vc->vc_decawm;
2234 draw_to = vc->vc_pos + 2;
2235 } else {
2236 vc->vc_x++;
2237 draw_to = (vc->vc_pos += 2);
d4328b40 2238 }
2f1a2ccb
EK		 2239
2240 if (!--width) break;
2241
2242 tc = conv_uni_to_pc(vc, ' '); /* A space is printed in the second column */
2243 if (tc < 0) tc = ' ';
2244 }
2245
2246 if (rescan) {
2247 rescan = 0;
2248 inverse = 0;
2249 width = 1;
d4328b40
AT		 2250 c = orig;
2251 goto rescan_last_byte;
2252 }
1da177e4
LT		 2253 continue;
2254 }
2255 FLUSH
2256 do_con_trol(tty, vc, orig);
2257 }
2258 FLUSH
2259 console_conditional_schedule();
2260 release_console_sem();
2261
2262out:
2263 return n;
2264#undef FLUSH
2265}
2266
2267/*
2268 * This is the console switching callback.
2269 *
2270 * Doing console switching in a process context allows
2271 * us to do the switches asynchronously (needed when we want
2272 * to switch due to a keyboard interrupt). Synchronization
2273 * with other console code and prevention of re-entrancy is
2274 * ensured with console_sem.
2275 */
65f27f38 2276static void console_callback(struct work_struct *ignored)
1da177e4
LT		 2277{
2278 acquire_console_sem();
2279
2280 if (want_console >= 0) {
2281 if (want_console != fg_console &&
2282 vc_cons_allocated(want_console)) {
2283 hide_cursor(vc_cons[fg_console].d);
2284 change_console(vc_cons[want_console].d);
2285 /* we only changed when the console had already
2286 been allocated - a new console is not created
2287 in an interrupt routine */
2288 }
2289 want_console = -1;
2290 }
2291 if (do_poke_blanked_console) { /* do not unblank for a LED change */
2292 do_poke_blanked_console = 0;
2293 poke_blanked_console();
2294 }
2295 if (scrollback_delta) {
2296 struct vc_data *vc = vc_cons[fg_console].d;
2297 clear_selection();
2298 if (vc->vc_mode == KD_TEXT)
2299 vc->vc_sw->con_scrolldelta(vc, scrollback_delta);
2300 scrollback_delta = 0;
2301 }
2302 if (blank_timer_expired) {
2303 do_blank_screen(0);
2304 blank_timer_expired = 0;
2305 }
2306
2307 release_console_sem();
2308}
2309
b257bc05 2310int set_console(int nr)
1da177e4 2311{
b257bc05
AJ		 2312 struct vc_data *vc = vc_cons[fg_console].d;
2313
2314 if (!vc_cons_allocated(nr) || vt_dont_switch ||
2315 (vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) {
2316
2317 /*
2318 * Console switch will fail in console_callback() or
2319 * change_console() so there is no point scheduling
2320 * the callback
2321 *
2322 * Existing set_console() users don't check the return
2323 * value so this shouldn't break anything
2324 */
2325 return -EINVAL;
2326 }
2327
1da177e4
LT		 2328 want_console = nr;
2329 schedule_console_callback();
b257bc05
AJ		 2330
2331 return 0;
1da177e4
LT		 2332}
2333
2334struct tty_driver *console_driver;
2335
2336#ifdef CONFIG_VT_CONSOLE
2337
2338/*
2339 * Console on virtual terminal
2340 *
2341 * The console must be locked when we get here.
2342 */
2343
2344static void vt_console_print(struct console *co, const char *b, unsigned count)
2345{
2346 struct vc_data *vc = vc_cons[fg_console].d;
2347 unsigned char c;
2348 static unsigned long printing;
2349 const ushort *start;
2350 ushort cnt = 0;
2351 ushort myx;
2352
2353 /* console busy or not yet initialized */
2354 if (!printable || test_and_set_bit(0, &printing))
2355 return;
2356
2357 if (kmsg_redirect && vc_cons_allocated(kmsg_redirect - 1))
2358 vc = vc_cons[kmsg_redirect - 1].d;
2359
2360 /* read `x' only after setting currcons properly (otherwise
2361 the `x' macro will read the x of the foreground console). */
2362 myx = vc->vc_x;
2363
2364 if (!vc_cons_allocated(fg_console)) {
2365 /* impossible */
2366 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2367 goto quit;
2368 }
2369
2370 if (vc->vc_mode != KD_TEXT)
2371 goto quit;
2372
2373 /* undraw cursor first */
2374 if (IS_FG(vc))
2375 hide_cursor(vc);
2376
2377 start = (ushort *)vc->vc_pos;
2378
2379 /* Contrived structure to try to emulate original need_wrap behaviour
2380 * Problems caused when we have need_wrap set on '\n' character */
2381 while (count--) {
2382 c = *b++;
2383 if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) {
2384 if (cnt > 0) {
2385 if (CON_IS_VISIBLE(vc))
2386 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2387 vc->vc_x += cnt;
2388 if (vc->vc_need_wrap)
2389 vc->vc_x--;
2390 cnt = 0;
2391 }
2392 if (c == 8) { /* backspace */
2393 bs(vc);
2394 start = (ushort *)vc->vc_pos;
2395 myx = vc->vc_x;
2396 continue;
2397 }
2398 if (c != 13)
2399 lf(vc);
2400 cr(vc);
2401 start = (ushort *)vc->vc_pos;
2402 myx = vc->vc_x;
2403 if (c == 10 || c == 13)
2404 continue;
2405 }
2406 scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos);
2407 cnt++;
2408 if (myx == vc->vc_cols - 1) {
2409 vc->vc_need_wrap = 1;
2410 continue;
2411 }
2412 vc->vc_pos += 2;
2413 myx++;
2414 }
2415 if (cnt > 0) {
2416 if (CON_IS_VISIBLE(vc))
2417 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2418 vc->vc_x += cnt;
2419 if (vc->vc_x == vc->vc_cols) {
2420 vc->vc_x--;
2421 vc->vc_need_wrap = 1;
2422 }
2423 }
2424 set_cursor(vc);
2425
2426quit:
2427 clear_bit(0, &printing);
2428}
2429
2430static struct tty_driver *vt_console_device(struct console *c, int *index)
2431{
2432 *index = c->index ? c->index-1 : fg_console;
2433 return console_driver;
2434}
2435
2436static struct console vt_console_driver = {
2437 .name = "tty",
2438 .write = vt_console_print,
2439 .device = vt_console_device,
2440 .unblank = unblank_screen,
2441 .flags = CON_PRINTBUFFER,
2442 .index = -1,
2443};
2444#endif
2445
2446/*
2447 * Handling of Linux-specific VC ioctls
2448 */
2449
2450/*
2451 * Generally a bit racy with respect to console_sem().
2452 *
2453 * There are some functions which don't need it.
2454 *
2455 * There are some functions which can sleep for arbitrary periods
2456 * (paste_selection) but we don't need the lock there anyway.
2457 *
2458 * set_selection has locking, and definitely needs it
2459 */
2460
2461int tioclinux(struct tty_struct *tty, unsigned long arg)
2462{
2463 char type, data;
2464 char __user *p = (char __user *)arg;
2465 int lines;
2466 int ret;
2467
2468 if (tty->driver->type != TTY_DRIVER_TYPE_CONSOLE)
2469 return -EINVAL;
2470 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN))
2471 return -EPERM;
2472 if (get_user(type, p))
2473 return -EFAULT;
2474 ret = 0;
2475 switch (type)
2476 {
2477 case TIOCL_SETSEL:
2478 acquire_console_sem();
2479 ret = set_selection((struct tiocl_selection __user *)(p+1), tty);
2480 release_console_sem();
2481 break;
2482 case TIOCL_PASTESEL:
2483 ret = paste_selection(tty);
2484 break;
2485 case TIOCL_UNBLANKSCREEN:
2d237c63 2486 acquire_console_sem();
1da177e4 2487 unblank_screen();
2d237c63 2488 release_console_sem();
1da177e4
LT		 2489 break;
2490 case TIOCL_SELLOADLUT:
2491 ret = sel_loadlut(p);
2492 break;
2493 case TIOCL_GETSHIFTSTATE:
2494
2495 /*
2496 * Make it possible to react to Shift+Mousebutton.
2497 * Note that 'shift_state' is an undocumented
2498 * kernel-internal variable; programs not closely
2499 * related to the kernel should not use this.
2500 */
2501 data = shift_state;
2502 ret = __put_user(data, p);
2503 break;
2504 case TIOCL_GETMOUSEREPORTING:
2505 data = mouse_reporting();
2506 ret = __put_user(data, p);
2507 break;
2508 case TIOCL_SETVESABLANK:
403aac96 2509 ret = set_vesa_blanking(p);
1da177e4 2510 break;
0ca07731
RW		 2511 case TIOCL_GETKMSGREDIRECT:
2512 data = kmsg_redirect;
2513 ret = __put_user(data, p);
2514 break;
1da177e4
LT		 2515 case TIOCL_SETKMSGREDIRECT:
2516 if (!capable(CAP_SYS_ADMIN)) {
2517 ret = -EPERM;
2518 } else {
2519 if (get_user(data, p+1))
2520 ret = -EFAULT;
2521 else
2522 kmsg_redirect = data;
2523 }
2524 break;
2525 case TIOCL_GETFGCONSOLE:
2526 ret = fg_console;
2527 break;
2528 case TIOCL_SCROLLCONSOLE:
2529 if (get_user(lines, (s32 __user *)(p+4))) {
2530 ret = -EFAULT;
2531 } else {
2532 scrollfront(vc_cons[fg_console].d, lines);
2533 ret = 0;
2534 }
2535 break;
2536 case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
2d237c63 2537 acquire_console_sem();
1da177e4
LT		 2538 ignore_poke = 1;
2539 do_blank_screen(0);
2d237c63 2540 release_console_sem();
1da177e4
LT		 2541 break;
2542 case TIOCL_BLANKEDSCREEN:
2543 ret = console_blanked;
2544 break;
2545 default:
2546 ret = -EINVAL;
2547 break;
2548 }
2549 return ret;
2550}
2551
2552/*
2553 * /dev/ttyN handling
2554 */
2555
2556static int con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2557{
2558 int retval;
2559
2560 retval = do_con_write(tty, buf, count);
2561 con_flush_chars(tty);
2562
2563 return retval;
2564}
2565
2566static void con_put_char(struct tty_struct *tty, unsigned char ch)
2567{
2568 if (in_interrupt())
2569 return; /* n_r3964 calls put_char() from interrupt context */
2570 do_con_write(tty, &ch, 1);
2571}
2572
2573static int con_write_room(struct tty_struct *tty)
2574{
2575 if (tty->stopped)
2576 return 0;
2577 return 4096; /* No limit, really; we're not buffering */
2578}
2579
2580static int con_chars_in_buffer(struct tty_struct *tty)
2581{
2582 return 0; /* we're not buffering */
2583}
2584
2585/*
2586 * con_throttle and con_unthrottle are only used for
2587 * paste_selection(), which has to stuff in a large number of
2588 * characters...
2589 */
2590static void con_throttle(struct tty_struct *tty)
2591{
2592}
2593
2594static void con_unthrottle(struct tty_struct *tty)
2595{
2596 struct vc_data *vc = tty->driver_data;
2597
2598 wake_up_interruptible(&vc->paste_wait);
2599}
2600
2601/*
2602 * Turn the Scroll-Lock LED on when the tty is stopped
2603 */
2604static void con_stop(struct tty_struct *tty)
2605{
2606 int console_num;
2607 if (!tty)
2608 return;
2609 console_num = tty->index;
2610 if (!vc_cons_allocated(console_num))
2611 return;
2612 set_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2613 set_leds();
2614}
2615
2616/*
2617 * Turn the Scroll-Lock LED off when the console is started
2618 */
2619static void con_start(struct tty_struct *tty)
2620{
2621 int console_num;
2622 if (!tty)
2623 return;
2624 console_num = tty->index;
2625 if (!vc_cons_allocated(console_num))
2626 return;
2627 clr_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2628 set_leds();
2629}
2630
2631static void con_flush_chars(struct tty_struct *tty)
2632{
2633 struct vc_data *vc;
2634
2635 if (in_interrupt()) /* from flush_to_ldisc */
2636 return;
2637
2638 /* if we race with con_close(), vt may be null */
2639 acquire_console_sem();
2640 vc = tty->driver_data;
2641 if (vc)
2642 set_cursor(vc);
2643 release_console_sem();
2644}
2645
2646/*
2647 * Allocate the console screen memory.
2648 */
2649static int con_open(struct tty_struct *tty, struct file *filp)
2650{
2651 unsigned int currcons = tty->index;
2652 int ret = 0;
2653
2654 acquire_console_sem();
f786648b 2655 if (tty->driver_data == NULL) {
1da177e4
LT		 2656 ret = vc_allocate(currcons);
2657 if (ret == 0) {
2658 struct vc_data *vc = vc_cons[currcons].d;
2659 tty->driver_data = vc;
2660 vc->vc_tty = tty;
2661
2662 if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
2663 tty->winsize.ws_row = vc_cons[currcons].d->vc_rows;
2664 tty->winsize.ws_col = vc_cons[currcons].d->vc_cols;
2665 }
2666 release_console_sem();
d09d7ddf 2667 vcs_make_sysfs(tty);
1da177e4
LT		 2668 return ret;
2669 }
2670 }
2671 release_console_sem();
2672 return ret;
2673}
2674
2675/*
70522e12 2676 * We take tty_mutex in here to prevent another thread from coming in via init_dev
1da177e4
LT		 2677 * and taking a ref against the tty while we're in the process of forgetting
2678 * about it and cleaning things up.
2679 *
d09d7ddf 2680 * This is because vcs_remove_sysfs() can sleep and will drop the BKL.
1da177e4
LT		 2681 */
2682static void con_close(struct tty_struct *tty, struct file *filp)
2683{
70522e12 2684 mutex_lock(&tty_mutex);
1da177e4
LT		 2685 acquire_console_sem();
2686 if (tty && tty->count == 1) {
2687 struct vc_data *vc = tty->driver_data;
2688
2689 if (vc)
2690 vc->vc_tty = NULL;
2691 tty->driver_data = NULL;
2692 release_console_sem();
d09d7ddf 2693 vcs_remove_sysfs(tty);
70522e12 2694 mutex_unlock(&tty_mutex);
1da177e4 2695 /*
70522e12 2696 * tty_mutex is released, but we still hold BKL, so there is
1da177e4
LT		 2697 * still exclusion against init_dev()
2698 */
2699 return;
2700 }
2701 release_console_sem();
70522e12 2702 mutex_unlock(&tty_mutex);
1da177e4
LT		 2703}
2704
fa6ce9ab
JE		 2705static int default_italic_color = 2; // green (ASCII)
2706static int default_underline_color = 3; // cyan (ASCII)
2707module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR);
2708module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR);
2709
1da177e4
LT		 2710static void vc_init(struct vc_data *vc, unsigned int rows,
2711 unsigned int cols, int do_clear)
2712{
2713 int j, k ;
2714
2715 vc->vc_cols = cols;
2716 vc->vc_rows = rows;
2717 vc->vc_size_row = cols << 1;
2718 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
2719
2720 set_origin(vc);
2721 vc->vc_pos = vc->vc_origin;
2722 reset_vc(vc);
2723 for (j=k=0; j<16; j++) {
2724 vc->vc_palette[k++] = default_red[j] ;
2725 vc->vc_palette[k++] = default_grn[j] ;
2726 vc->vc_palette[k++] = default_blu[j] ;
2727 }
2728 vc->vc_def_color = 0x07; /* white */
fa6ce9ab
JE		 2729 vc->vc_ulcolor = default_underline_color;
2730 vc->vc_itcolor = default_italic_color;
1da177e4
LT		 2731 vc->vc_halfcolor = 0x08; /* grey */
2732 init_waitqueue_head(&vc->paste_wait);
2733 reset_terminal(vc, do_clear);
2734}
2735
2736/*
2737 * This routine initializes console interrupts, and does nothing
2738 * else. If you want the screen to clear, call tty_write with
2739 * the appropriate escape-sequence.
2740 */
2741
2742static int __init con_init(void)
2743{
2744 const char *display_desc = NULL;
2745 struct vc_data *vc;
3e795de7 2746 unsigned int currcons = 0, i;
1da177e4
LT		 2747
2748 acquire_console_sem();
2749
2750 if (conswitchp)
2751 display_desc = conswitchp->con_startup();
2752 if (!display_desc) {
2753 fg_console = 0;
2754 release_console_sem();
2755 return 0;
2756 }
2757
3e795de7
AD		 2758 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2759 struct con_driver *con_driver = &registered_con_driver[i];
2760
2761 if (con_driver->con == NULL) {
2762 con_driver->con = conswitchp;
2763 con_driver->desc = display_desc;
2764 con_driver->flag = CON_DRIVER_FLAG_INIT;
2765 con_driver->first = 0;
2766 con_driver->last = MAX_NR_CONSOLES - 1;
2767 break;
2768 }
2769 }
2770
2771 for (i = 0; i < MAX_NR_CONSOLES; i++)
2772 con_driver_map[i] = conswitchp;
2773
1da177e4
LT		 2774 if (blankinterval) {
2775 blank_state = blank_normal_wait;
2776 mod_timer(&console_timer, jiffies + blankinterval);
2777 }
2778
2779 /*
2780 * kmalloc is not running yet - we use the bootmem allocator.
2781 */
2782 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) {
2783 vc_cons[currcons].d = vc = alloc_bootmem(sizeof(struct vc_data));
7f1f86a0 2784 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
1da177e4
LT		 2785 visual_init(vc, currcons, 1);
2786 vc->vc_screenbuf = (unsigned short *)alloc_bootmem(vc->vc_screenbuf_size);
2787 vc->vc_kmalloced = 0;
2788 vc_init(vc, vc->vc_rows, vc->vc_cols,
2789 currcons || !vc->vc_sw->con_save_screen);
2790 }
2791 currcons = fg_console = 0;
2792 master_display_fg = vc = vc_cons[currcons].d;
2793 set_origin(vc);
2794 save_screen(vc);
2795 gotoxy(vc, vc->vc_x, vc->vc_y);
2796 csi_J(vc, 0);
2797 update_screen(vc);
2798 printk("Console: %s %s %dx%d",
2799 vc->vc_can_do_color ? "colour" : "mono",
2800 display_desc, vc->vc_cols, vc->vc_rows);
2801 printable = 1;
2802 printk("\n");
2803
2804 release_console_sem();
2805
2806#ifdef CONFIG_VT_CONSOLE
2807 register_console(&vt_console_driver);
2808#endif
2809 return 0;
2810}
2811console_initcall(con_init);
2812
b68e31d0 2813static const struct tty_operations con_ops = {
1da177e4
LT		 2814 .open = con_open,
2815 .close = con_close,
2816 .write = con_write,
2817 .write_room = con_write_room,
2818 .put_char = con_put_char,
2819 .flush_chars = con_flush_chars,
2820 .chars_in_buffer = con_chars_in_buffer,
2821 .ioctl = vt_ioctl,
2822 .stop = con_stop,
2823 .start = con_start,
2824 .throttle = con_throttle,
2825 .unthrottle = con_unthrottle,
2826};
2827
2828int __init vty_init(void)
2829{
2830 vcs_init();
2831
2832 console_driver = alloc_tty_driver(MAX_NR_CONSOLES);
2833 if (!console_driver)
2834 panic("Couldn't allocate console driver\n");
2835 console_driver->owner = THIS_MODULE;
1da177e4
LT		 2836 console_driver->name = "tty";
2837 console_driver->name_base = 1;
2838 console_driver->major = TTY_MAJOR;
2839 console_driver->minor_start = 1;
2840 console_driver->type = TTY_DRIVER_TYPE_CONSOLE;
2841 console_driver->init_termios = tty_std_termios;
2842 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS;
2843 tty_set_operations(console_driver, &con_ops);
2844 if (tty_register_driver(console_driver))
2845 panic("Couldn't register console driver\n");
2846
2847 kbd_init();
2848 console_map_init();
2849#ifdef CONFIG_PROM_CONSOLE
2850 prom_con_init();
2851#endif
2852#ifdef CONFIG_MDA_CONSOLE
2853 mda_console_init();
2854#endif
2855 return 0;
2856}
2857
2858#ifndef VT_SINGLE_DRIVER
6db4063c
AD		 2859#include <linux/device.h>
2860
2861static struct class *vtconsole_class;
2862
3e795de7
AD		 2863static int bind_con_driver(const struct consw *csw, int first, int last,
2864 int deflt)
1da177e4 2865{
3e795de7
AD		 2866 struct module *owner = csw->owner;
2867 const char *desc = NULL;
2868 struct con_driver *con_driver;
2869 int i, j = -1, k = -1, retval = -ENODEV;
1da177e4 2870
1da177e4
LT		 2871 if (!try_module_get(owner))
2872 return -ENODEV;
2873
1c8ce271 2874 acquire_console_sem();
1c8ce271 2875
3e795de7
AD		 2876 /* check if driver is registered */
2877 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2878 con_driver = &registered_con_driver[i];
2879
2880 if (con_driver->con == csw) {
2881 desc = con_driver->desc;
2882 retval = 0;
2883 break;
2884 }
2885 }
2886
2887 if (retval)
2888 goto err;
2889
2890 if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) {
2891 csw->con_startup();
2892 con_driver->flag |= CON_DRIVER_FLAG_INIT;
1da177e4 2893 }
1c8ce271 2894
1da177e4
LT		 2895 if (deflt) {
2896 if (conswitchp)
2897 module_put(conswitchp->owner);
1c8ce271 2898
1da177e4
LT		 2899 __module_get(owner);
2900 conswitchp = csw;
2901 }
2902
3e795de7
AD		 2903 first = max(first, con_driver->first);
2904 last = min(last, con_driver->last);
2905
1da177e4
LT		 2906 for (i = first; i <= last; i++) {
2907 int old_was_color;
2908 struct vc_data *vc = vc_cons[i].d;
2909
2910 if (con_driver_map[i])
2911 module_put(con_driver_map[i]->owner);
2912 __module_get(owner);
2913 con_driver_map[i] = csw;
2914
2915 if (!vc || !vc->vc_sw)
2916 continue;
2917
2918 j = i;
1c8ce271 2919
4ee1acce
DH		 2920 if (CON_IS_VISIBLE(vc)) {
2921 k = i;
1da177e4 2922 save_screen(vc);
4ee1acce
DH		 2923 }
2924
1da177e4
LT		 2925 old_was_color = vc->vc_can_do_color;
2926 vc->vc_sw->con_deinit(vc);
2927 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
1da177e4 2928 visual_init(vc, i, 0);
1c8ce271 2929 set_origin(vc);
1da177e4
LT		 2930 update_attr(vc);
2931
2932 /* If the console changed between mono <-> color, then
2933 * the attributes in the screenbuf will be wrong. The
2934 * following resets all attributes to something sane.
2935 */
2936 if (old_was_color != vc->vc_can_do_color)
2937 clear_buffer_attributes(vc);
1da177e4 2938 }
4ee1acce 2939
1da177e4
LT		 2940 printk("Console: switching ");
2941 if (!deflt)
2942 printk("consoles %d-%d ", first+1, last+1);
4ee1acce
DH		 2943 if (j >= 0) {
2944 struct vc_data *vc = vc_cons[j].d;
2945
1da177e4 2946 printk("to %s %s %dx%d\n",
4ee1acce
DH		 2947 vc->vc_can_do_color ? "colour" : "mono",
2948 desc, vc->vc_cols, vc->vc_rows);
2949
2950 if (k >= 0) {
2951 vc = vc_cons[k].d;
2952 update_screen(vc);
2953 }
2954 } else
1da177e4
LT		 2955 printk("to %s\n", desc);
2956
3e795de7
AD		 2957 retval = 0;
2958err:
1da177e4 2959 release_console_sem();
1da177e4 2960 module_put(owner);
3e795de7
AD		 2961 return retval;
2962};
1da177e4 2963
13ae6645
AD		 2964#ifdef CONFIG_VT_HW_CONSOLE_BINDING
2965static int con_is_graphics(const struct consw *csw, int first, int last)
2966{
2967 int i, retval = 0;
2968
2969 for (i = first; i <= last; i++) {
2970 struct vc_data *vc = vc_cons[i].d;
2971
2972 if (vc && vc->vc_mode == KD_GRAPHICS) {
2973 retval = 1;
2974 break;
2975 }
2976 }
2977
2978 return retval;
2979}
2980
3e795de7
AD		 2981static int unbind_con_driver(const struct consw *csw, int first, int last,
2982 int deflt)
1da177e4 2983{
3e795de7
AD		 2984 struct module *owner = csw->owner;
2985 const struct consw *defcsw = NULL;
2986 struct con_driver *con_driver = NULL, *con_back = NULL;
2987 int i, retval = -ENODEV;
1da177e4 2988
3e795de7
AD		 2989 if (!try_module_get(owner))
2990 return -ENODEV;
2991
2992 acquire_console_sem();
2993
2994 /* check if driver is registered and if it is unbindable */
2995 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2996 con_driver = &registered_con_driver[i];
2997
2998 if (con_driver->con == csw &&
6db4063c 2999 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3e795de7
AD		 3000 retval = 0;
3001 break;
3002 }
3003 }
3004
3005 if (retval) {
3006 release_console_sem();
3007 goto err;
3008 }
3009
6db4063c
AD		 3010 retval = -ENODEV;
3011
3e795de7
AD		 3012 /* check if backup driver exists */
3013 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3014 con_back = &registered_con_driver[i];
3015
3016 if (con_back->con &&
6db4063c 3017 !(con_back->flag & CON_DRIVER_FLAG_MODULE)) {
3e795de7
AD		 3018 defcsw = con_back->con;
3019 retval = 0;
3020 break;
3021 }
3022 }
3023
3024 if (retval) {
3025 release_console_sem();
3026 goto err;
3027 }
3028
3029 if (!con_is_bound(csw)) {
3030 release_console_sem();
3031 goto err;
3032 }
3033
3034 first = max(first, con_driver->first);
3035 last = min(last, con_driver->last);
3036
3037 for (i = first; i <= last; i++) {
1da177e4
LT		 3038 if (con_driver_map[i] == csw) {
3039 module_put(csw->owner);
3040 con_driver_map[i] = NULL;
3041 }
3e795de7
AD		 3042 }
3043
3044 if (!con_is_bound(defcsw)) {
6db4063c
AD		 3045 const struct consw *defconsw = conswitchp;
3046
3e795de7
AD		 3047 defcsw->con_startup();
3048 con_back->flag |= CON_DRIVER_FLAG_INIT;
6db4063c
AD		 3049 /*
3050 * vgacon may change the default driver to point
3051 * to dummycon, we restore it here...
3052 */
3053 conswitchp = defconsw;
3e795de7
AD		 3054 }
3055
3056 if (!con_is_bound(csw))
3057 con_driver->flag &= ~CON_DRIVER_FLAG_INIT;
3058
3059 release_console_sem();
6db4063c
AD		 3060 /* ignore return value, binding should not fail */
3061 bind_con_driver(defcsw, first, last, deflt);
3e795de7
AD		 3062err:
3063 module_put(owner);
3064 return retval;
3065
3066}
3067
6db4063c
AD		 3068static int vt_bind(struct con_driver *con)
3069{
3070 const struct consw *defcsw = NULL, *csw = NULL;
3071 int i, more = 1, first = -1, last = -1, deflt = 0;
3072
3073 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3074 con_is_graphics(con->con, con->first, con->last))
3075 goto err;
3076
3077 csw = con->con;
3078
3079 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3080 struct con_driver *con = &registered_con_driver[i];
3081
3082 if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) {
3083 defcsw = con->con;
3084 break;
3085 }
3086 }
3087
3088 if (!defcsw)
3089 goto err;
3090
3091 while (more) {
3092 more = 0;
3093
3094 for (i = con->first; i <= con->last; i++) {
3095 if (con_driver_map[i] == defcsw) {
3096 if (first == -1)
3097 first = i;
3098 last = i;
3099 more = 1;
3100 } else if (first != -1)
3101 break;
3102 }
3103
3104 if (first == 0 && last == MAX_NR_CONSOLES -1)
3105 deflt = 1;
3106
3107 if (first != -1)
3108 bind_con_driver(csw, first, last, deflt);
3109
3110 first = -1;
3111 last = -1;
3112 deflt = 0;
3113 }
3114
3115err:
3116 return 0;
3117}
3118
3119static int vt_unbind(struct con_driver *con)
3120{
3121 const struct consw *csw = NULL;
3122 int i, more = 1, first = -1, last = -1, deflt = 0;
3123
3124 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3125 con_is_graphics(con->con, con->first, con->last))
3126 goto err;
3127
3128 csw = con->con;
3129
3130 while (more) {
3131 more = 0;
3132
3133 for (i = con->first; i <= con->last; i++) {
3134 if (con_driver_map[i] == csw) {
3135 if (first == -1)
3136 first = i;
3137 last = i;
3138 more = 1;
3139 } else if (first != -1)
3140 break;
3141 }
3142
3143 if (first == 0 && last == MAX_NR_CONSOLES -1)
3144 deflt = 1;
3145
3146 if (first != -1)
3147 unbind_con_driver(csw, first, last, deflt);
3148
3149 first = -1;
3150 last = -1;
3151 deflt = 0;
3152 }
3153
3154err:
3155 return 0;
3156}
13ae6645
AD		 3157#else
3158static inline int vt_bind(struct con_driver *con)
3159{
3160 return 0;
3161}
3162static inline int vt_unbind(struct con_driver *con)
3163{
3164 return 0;
3165}
3166#endif /* CONFIG_VT_HW_CONSOLE_BINDING */
6db4063c 3167
805952a8 3168static ssize_t store_bind(struct device *dev, struct device_attribute *attr,
6db4063c
AD		 3169 const char *buf, size_t count)
3170{
805952a8 3171 struct con_driver *con = dev_get_drvdata(dev);
6db4063c
AD		 3172 int bind = simple_strtoul(buf, NULL, 0);
3173
3174 if (bind)
3175 vt_bind(con);
3176 else
3177 vt_unbind(con);
3178
3179 return count;
3180}
3181
805952a8
GKH		 3182static ssize_t show_bind(struct device *dev, struct device_attribute *attr,
3183 char *buf)
6db4063c 3184{
805952a8 3185 struct con_driver *con = dev_get_drvdata(dev);
6db4063c
AD		 3186 int bind = con_is_bound(con->con);
3187
3188 return snprintf(buf, PAGE_SIZE, "%i\n", bind);
3189}
3190
805952a8
GKH		 3191static ssize_t show_name(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
3196 return snprintf(buf, PAGE_SIZE, "%s %s\n",
3197 (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)",
3198 con->desc);
3199
3200}
3201
805952a8 3202static struct device_attribute device_attrs[] = {
6db4063c
AD		 3203 __ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind),
3204 __ATTR(name, S_IRUGO, show_name, NULL),
3205};
3206
805952a8 3207static int vtconsole_init_device(struct con_driver *con)
6db4063c
AD		 3208{
3209 int i;
928e964f 3210 int error = 0;
6db4063c 3211
928e964f 3212 con->flag |= CON_DRIVER_FLAG_ATTR;
805952a8
GKH		 3213 dev_set_drvdata(con->dev, con);
3214 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3215 error = device_create_file(con->dev, &device_attrs[i]);
928e964f
AD		 3216 if (error)
3217 break;
3218 }
6db4063c 3219
928e964f
AD		 3220 if (error) {
3221 while (--i >= 0)
805952a8 3222 device_remove_file(con->dev, &device_attrs[i]);
928e964f
AD		 3223 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3224 }
3225
3226 return error;
6db4063c
AD		 3227}
3228
805952a8 3229static void vtconsole_deinit_device(struct con_driver *con)
6db4063c
AD		 3230{
3231 int i;
3232
928e964f 3233 if (con->flag & CON_DRIVER_FLAG_ATTR) {
805952a8
GKH		 3234 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3235 device_remove_file(con->dev, &device_attrs[i]);
928e964f
AD		 3236 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3237 }
6db4063c
AD		 3238}
3239
3e795de7
AD		 3240/**
3241 * con_is_bound - checks if driver is bound to the console
3242 * @csw: console driver
3243 *
3244 * RETURNS: zero if unbound, nonzero if bound
3245 *
3246 * Drivers can call this and if zero, they should release
3247 * all resources allocated on con_startup()
3248 */
3249int con_is_bound(const struct consw *csw)
3250{
3251 int i, bound = 0;
3252
3253 for (i = 0; i < MAX_NR_CONSOLES; i++) {
3254 if (con_driver_map[i] == csw) {
3255 bound = 1;
3256 break;
3257 }
3258 }
3259
3260 return bound;
3261}
3262EXPORT_SYMBOL(con_is_bound);
3263
3264/**
3265 * register_con_driver - register console driver to console layer
3266 * @csw: console driver
3267 * @first: the first console to take over, minimum value is 0
3268 * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1
3269 *
3270 * DESCRIPTION: This function registers a console driver which can later
3271 * bind to a range of consoles specified by @first and @last. It will
3272 * also initialize the console driver by calling con_startup().
3273 */
3274int register_con_driver(const struct consw *csw, int first, int last)
3275{
3276 struct module *owner = csw->owner;
3277 struct con_driver *con_driver;
3278 const char *desc;
3279 int i, retval = 0;
3280
3281 if (!try_module_get(owner))
3282 return -ENODEV;
3283
3284 acquire_console_sem();
3285
3286 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3287 con_driver = &registered_con_driver[i];
3288
3289 /* already registered */
3290 if (con_driver->con == csw)
3291 retval = -EINVAL;
3292 }
3293
3294 if (retval)
3295 goto err;
3296
3297 desc = csw->con_startup();
3298
3299 if (!desc)
3300 goto err;
3301
3302 retval = -EINVAL;
3303
3304 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3305 con_driver = &registered_con_driver[i];
3306
3307 if (con_driver->con == NULL) {
3308 con_driver->con = csw;
3309 con_driver->desc = desc;
6db4063c
AD		 3310 con_driver->node = i;
3311 con_driver->flag = CON_DRIVER_FLAG_MODULE |
3e795de7
AD		 3312 CON_DRIVER_FLAG_INIT;
3313 con_driver->first = first;
3314 con_driver->last = last;
3315 retval = 0;
3316 break;
3317 }
3318 }
3319
6db4063c
AD		 3320 if (retval)
3321 goto err;
3322
805952a8
GKH		 3323 con_driver->dev = device_create(vtconsole_class, NULL,
3324 MKDEV(0, con_driver->node),
3325 "vtcon%i", con_driver->node);
6db4063c 3326
805952a8
GKH		 3327 if (IS_ERR(con_driver->dev)) {
3328 printk(KERN_WARNING "Unable to create device for %s; "
6db4063c 3329 "errno = %ld\n", con_driver->desc,
805952a8
GKH		 3330 PTR_ERR(con_driver->dev));
3331 con_driver->dev = NULL;
6db4063c 3332 } else {
805952a8 3333 vtconsole_init_device(con_driver);
6db4063c 3334 }
928e964f 3335
3e795de7
AD		 3336err:
3337 release_console_sem();
3338 module_put(owner);
3339 return retval;
3340}
3341EXPORT_SYMBOL(register_con_driver);
3342
3343/**
3344 * unregister_con_driver - unregister console driver from console layer
3345 * @csw: console driver
3346 *
3347 * DESCRIPTION: All drivers that registers to the console layer must
3348 * call this function upon exit, or if the console driver is in a state
3349 * where it won't be able to handle console services, such as the
3350 * framebuffer console without loaded framebuffer drivers.
3351 *
3352 * The driver must unbind first prior to unregistration.
3353 */
3354int unregister_con_driver(const struct consw *csw)
3355{
3356 int i, retval = -ENODEV;
3357
3358 acquire_console_sem();
3359
3360 /* cannot unregister a bound driver */
3361 if (con_is_bound(csw))
3362 goto err;
3363
3364 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3365 struct con_driver *con_driver = &registered_con_driver[i];
3366
3367 if (con_driver->con == csw &&
6db4063c 3368 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
805952a8
GKH		 3369 vtconsole_deinit_device(con_driver);
3370 device_destroy(vtconsole_class,
3371 MKDEV(0, con_driver->node));
3e795de7
AD		 3372 con_driver->con = NULL;
3373 con_driver->desc = NULL;
805952a8 3374 con_driver->dev = NULL;
6db4063c 3375 con_driver->node = 0;
3e795de7
AD		 3376 con_driver->flag = 0;
3377 con_driver->first = 0;
3378 con_driver->last = 0;
3379 retval = 0;
3380 break;
3381 }
3382 }
3e795de7
AD		 3383err:
3384 release_console_sem();
3385 return retval;
3386}
3387EXPORT_SYMBOL(unregister_con_driver);
3388
3389/*
3390 * If we support more console drivers, this function is used
3391 * when a driver wants to take over some existing consoles
3392 * and become default driver for newly opened ones.
3393 *
3394 * take_over_console is basically a register followed by unbind
3395 */
3396int take_over_console(const struct consw *csw, int first, int last, int deflt)
3397{
3398 int err;
3399
3400 err = register_con_driver(csw, first, last);
3401
3402 if (!err)
6db4063c 3403 bind_con_driver(csw, first, last, deflt);
3e795de7
AD		 3404
3405 return err;
3406}
3407
3408/*
3409 * give_up_console is a wrapper to unregister_con_driver. It will only
3410 * work if driver is fully unbound.
3411 */
3412void give_up_console(const struct consw *csw)
3413{
3414 unregister_con_driver(csw);
3415}
3416
6db4063c 3417static int __init vtconsole_class_init(void)
3e795de7 3418{
6db4063c 3419 int i;
3e795de7 3420
6db4063c
AD		 3421 vtconsole_class = class_create(THIS_MODULE, "vtconsole");
3422 if (IS_ERR(vtconsole_class)) {
3423 printk(KERN_WARNING "Unable to create vt console class; "
3424 "errno = %ld\n", PTR_ERR(vtconsole_class));
3425 vtconsole_class = NULL;
3426 }
3e795de7 3427
6db4063c 3428 /* Add system drivers to sysfs */
3e795de7
AD		 3429 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3430 struct con_driver *con = &registered_con_driver[i];
3431
805952a8
GKH		 3432 if (con->con && !con->dev) {
3433 con->dev = device_create(vtconsole_class, NULL,
3434 MKDEV(0, con->node),
3435 "vtcon%i", con->node);
6db4063c 3436
805952a8 3437 if (IS_ERR(con->dev)) {
6db4063c 3438 printk(KERN_WARNING "Unable to create "
805952a8
GKH		 3439 "device for %s; errno = %ld\n",
3440 con->desc, PTR_ERR(con->dev));
3441 con->dev = NULL;
6db4063c 3442 } else {
805952a8 3443 vtconsole_init_device(con);
6db4063c 3444 }
3e795de7 3445 }
3e795de7
AD		 3446 }
3447
3e795de7
AD		 3448 return 0;
3449}
6db4063c 3450postcore_initcall(vtconsole_class_init);
3e795de7 3451
1da177e4
LT		 3452#endif
3453
3454/*
3455 * Screen blanking
3456 */
3457
403aac96 3458static int set_vesa_blanking(char __user *p)
1da177e4 3459{
403aac96
YY		 3460 unsigned int mode;
3461
3462 if (get_user(mode, p + 1))
3463 return -EFAULT;
3464
3465 vesa_blank_mode = (mode < 4) ? mode : 0;
3466 return 0;
1da177e4
LT		 3467}
3468
1da177e4
LT		 3469void do_blank_screen(int entering_gfx)
3470{
3471 struct vc_data *vc = vc_cons[fg_console].d;
3472 int i;
3473
3474 WARN_CONSOLE_UNLOCKED();
3475
3476 if (console_blanked) {
3477 if (blank_state == blank_vesa_wait) {
3478 blank_state = blank_off;
d060a321 3479 vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0);
1da177e4
LT		 3480 }
3481 return;
3482 }
3483 if (blank_state != blank_normal_wait)
3484 return;
3485 blank_state = blank_off;
3486
3487 /* entering graphics mode? */
3488 if (entering_gfx) {
3489 hide_cursor(vc);
3490 save_screen(vc);
3491 vc->vc_sw->con_blank(vc, -1, 1);
3492 console_blanked = fg_console + 1;
3493 set_origin(vc);
3494 return;
3495 }
3496
3497 /* don't blank graphics */
3498 if (vc->vc_mode != KD_TEXT) {
3499 console_blanked = fg_console + 1;
3500 return;
3501 }
3502
3503 hide_cursor(vc);
3504 del_timer_sync(&console_timer);
3505 blank_timer_expired = 0;
3506
3507 save_screen(vc);
3508 /* In case we need to reset origin, blanking hook returns 1 */
d060a321 3509 i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0);
1da177e4
LT		 3510 console_blanked = fg_console + 1;
3511 if (i)
3512 set_origin(vc);
3513
3514 if (console_blank_hook && console_blank_hook(1))
3515 return;
3516
d060a321 3517 if (vesa_off_interval && vesa_blank_mode) {
030babac 3518 blank_state = blank_vesa_wait;
1da177e4
LT		 3519 mod_timer(&console_timer, jiffies + vesa_off_interval);
3520 }
1da177e4
LT		 3521}
3522EXPORT_SYMBOL(do_blank_screen);
3523
3524/*
3525 * Called by timer as well as from vt_console_driver
3526 */
3527void do_unblank_screen(int leaving_gfx)
3528{
3529 struct vc_data *vc;
3530
3531 /* This should now always be called from a "sane" (read: can schedule)
3532 * context for the sake of the low level drivers, except in the special
3533 * case of oops_in_progress
3534 */
3535 if (!oops_in_progress)
3536 might_sleep();
3537
3538 WARN_CONSOLE_UNLOCKED();
3539
3540 ignore_poke = 0;
3541 if (!console_blanked)
3542 return;
3543 if (!vc_cons_allocated(fg_console)) {
3544 /* impossible */
3545 printk("unblank_screen: tty %d not allocated ??\n", fg_console+1);
3546 return;
3547 }
3548 vc = vc_cons[fg_console].d;
3549 if (vc->vc_mode != KD_TEXT)
3550 return; /* but leave console_blanked != 0 */
3551
3552 if (blankinterval) {
3553 mod_timer(&console_timer, jiffies + blankinterval);
3554 blank_state = blank_normal_wait;
3555 }
3556
3557 console_blanked = 0;
3558 if (vc->vc_sw->con_blank(vc, 0, leaving_gfx))
3559 /* Low-level driver cannot restore -> do it ourselves */
3560 update_screen(vc);
3561 if (console_blank_hook)
3562 console_blank_hook(0);
3563 set_palette(vc);
3564 set_cursor(vc);
3565}
3566EXPORT_SYMBOL(do_unblank_screen);
3567
3568/*
3569 * This is called by the outside world to cause a forced unblank, mostly for
3570 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
3571 * call it with 1 as an argument and so force a mode restore... that may kill
3572 * X or at least garbage the screen but would also make the Oops visible...
3573 */
3574void unblank_screen(void)
3575{
3576 do_unblank_screen(0);
3577}
3578
3579/*
70522e12 3580 * We defer the timer blanking to work queue so it can take the console mutex
1da177e4 3581 * (console operations can still happen at irq time, but only from printk which
70522e12 3582 * has the console mutex. Not perfect yet, but better than no locking
1da177e4
LT		 3583 */
3584static void blank_screen_t(unsigned long dummy)
3585{
cc63b1e1
JB		 3586 if (unlikely(!keventd_up())) {
3587 mod_timer(&console_timer, jiffies + blankinterval);
3588 return;
3589 }
1da177e4
LT		 3590 blank_timer_expired = 1;
3591 schedule_work(&console_work);
3592}
3593
3594void poke_blanked_console(void)
3595{
3596 WARN_CONSOLE_UNLOCKED();
3597
3598 /* Add this so we quickly catch whoever might call us in a non
3599 * safe context. Nowadays, unblank_screen() isn't to be called in
3600 * atomic contexts and is allowed to schedule (with the special case
3601 * of oops_in_progress, but that isn't of any concern for this
3602 * function. --BenH.
3603 */
3604 might_sleep();
3605
3606 /* This isn't perfectly race free, but a race here would be mostly harmless,
3607 * at worse, we'll do a spurrious blank and it's unlikely
3608 */
3609 del_timer(&console_timer);
3610 blank_timer_expired = 0;
3611
3612 if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS)
3613 return;
3614 if (console_blanked)
3615 unblank_screen();
3616 else if (blankinterval) {
3617 mod_timer(&console_timer, jiffies + blankinterval);
3618 blank_state = blank_normal_wait;
3619 }
3620}
3621
3622/*
3623 * Palettes
3624 */
3625
3626static void set_palette(struct vc_data *vc)
3627{
3628 WARN_CONSOLE_UNLOCKED();
3629
3630 if (vc->vc_mode != KD_GRAPHICS)
3631 vc->vc_sw->con_set_palette(vc, color_table);
3632}
3633
3634static int set_get_cmap(unsigned char __user *arg, int set)
3635{
3636 int i, j, k;
3637
3638 WARN_CONSOLE_UNLOCKED();
3639
3640 for (i = 0; i < 16; i++)
3641 if (set) {
3642 get_user(default_red[i], arg++);
3643 get_user(default_grn[i], arg++);
3644 get_user(default_blu[i], arg++);
3645 } else {
3646 put_user(default_red[i], arg++);
3647 put_user(default_grn[i], arg++);
3648 put_user(default_blu[i], arg++);
3649 }
3650 if (set) {
3651 for (i = 0; i < MAX_NR_CONSOLES; i++)
3652 if (vc_cons_allocated(i)) {
3653 for (j = k = 0; j < 16; j++) {
3654 vc_cons[i].d->vc_palette[k++] = default_red[j];
3655 vc_cons[i].d->vc_palette[k++] = default_grn[j];
3656 vc_cons[i].d->vc_palette[k++] = default_blu[j];
3657 }
3658 set_palette(vc_cons[i].d);
3659 }
3660 }
3661 return 0;
3662}
3663
3664/*
3665 * Load palette into the DAC registers. arg points to a colour
3666 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
3667 */
3668
3669int con_set_cmap(unsigned char __user *arg)
3670{
3671 int rc;
3672
3673 acquire_console_sem();
3674 rc = set_get_cmap (arg,1);
3675 release_console_sem();
3676
3677 return rc;
3678}
3679
3680int con_get_cmap(unsigned char __user *arg)
3681{
3682 int rc;
3683
3684 acquire_console_sem();
3685 rc = set_get_cmap (arg,0);
3686 release_console_sem();
3687
3688 return rc;
3689}
3690
3691void reset_palette(struct vc_data *vc)
3692{
3693 int j, k;
3694 for (j=k=0; j<16; j++) {
3695 vc->vc_palette[k++] = default_red[j];
3696 vc->vc_palette[k++] = default_grn[j];
3697 vc->vc_palette[k++] = default_blu[j];
3698 }
3699 set_palette(vc);
3700}
3701
3702/*
3703 * Font switching
3704 *
3705 * Currently we only support fonts up to 32 pixels wide, at a maximum height
3706 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
3707 * depending on width) reserved for each character which is kinda wasty, but
3708 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
3709 * is upto the actual low-level console-driver convert data into its favorite
3710 * format (maybe we should add a `fontoffset' field to the `display'
3711 * structure so we won't have to convert the fontdata all the time.
3712 * /Jes
3713 */
3714
3715#define max_font_size 65536
3716
3717static int con_font_get(struct vc_data *vc, struct console_font_op *op)
3718{
3719 struct console_font font;
3720 int rc = -EINVAL;
3721 int c;
3722
3723 if (vc->vc_mode != KD_TEXT)
3724 return -EINVAL;
3725
3726 if (op->data) {
3727 font.data = kmalloc(max_font_size, GFP_KERNEL);
3728 if (!font.data)
3729 return -ENOMEM;
3730 } else
3731 font.data = NULL;
3732
3733 acquire_console_sem();
3734 if (vc->vc_sw->con_font_get)
3735 rc = vc->vc_sw->con_font_get(vc, &font);
3736 else
3737 rc = -ENOSYS;
3738 release_console_sem();
3739
3740 if (rc)
3741 goto out;
3742
3743 c = (font.width+7)/8 * 32 * font.charcount;
3744
3745 if (op->data && font.charcount > op->charcount)
3746 rc = -ENOSPC;
3747 if (!(op->flags & KD_FONT_FLAG_OLD)) {
3748 if (font.width > op->width || font.height > op->height)
3749 rc = -ENOSPC;
3750 } else {
3751 if (font.width != 8)
3752 rc = -EIO;
3753 else if ((op->height && font.height > op->height) ||
3754 font.height > 32)
3755 rc = -ENOSPC;
3756 }
3757 if (rc)
3758 goto out;
3759
3760 op->height = font.height;
3761 op->width = font.width;
3762 op->charcount = font.charcount;
3763
3764 if (op->data && copy_to_user(op->data, font.data, c))
3765 rc = -EFAULT;
3766
3767out:
3768 kfree(font.data);
3769 return rc;
3770}
3771
3772static int con_font_set(struct vc_data *vc, struct console_font_op *op)
3773{
3774 struct console_font font;
3775 int rc = -EINVAL;
3776 int size;
3777
3778 if (vc->vc_mode != KD_TEXT)
3779 return -EINVAL;
3780 if (!op->data)
3781 return -EINVAL;
3782 if (op->charcount > 512)
3783 return -EINVAL;
3784 if (!op->height) { /* Need to guess font height [compat] */
3785 int h, i;
3786 u8 __user *charmap = op->data;
3787 u8 tmp;
3788
3789 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
3790 so that we can get rid of this soon */
3791 if (!(op->flags & KD_FONT_FLAG_OLD))
3792 return -EINVAL;
3793 for (h = 32; h > 0; h--)
3794 for (i = 0; i < op->charcount; i++) {
3795 if (get_user(tmp, &charmap[32*i+h-1]))
3796 return -EFAULT;
3797 if (tmp)
3798 goto nonzero;
3799 }
3800 return -EINVAL;
3801 nonzero:
3802 op->height = h;
3803 }
3804 if (op->width <= 0 || op->width > 32 || op->height > 32)
3805 return -EINVAL;
3806 size = (op->width+7)/8 * 32 * op->charcount;
3807 if (size > max_font_size)
3808 return -ENOSPC;
3809 font.charcount = op->charcount;
3810 font.height = op->height;
3811 font.width = op->width;
3812 font.data = kmalloc(size, GFP_KERNEL);
3813 if (!font.data)
3814 return -ENOMEM;
3815 if (copy_from_user(font.data, op->data, size)) {
3816 kfree(font.data);
3817 return -EFAULT;
3818 }
3819 acquire_console_sem();
3820 if (vc->vc_sw->con_font_set)
3821 rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
3822 else
3823 rc = -ENOSYS;
3824 release_console_sem();
3825 kfree(font.data);
3826 return rc;
3827}
3828
3829static int con_font_default(struct vc_data *vc, struct console_font_op *op)
3830{
3831 struct console_font font = {.width = op->width, .height = op->height};
3832 char name[MAX_FONT_NAME];
3833 char *s = name;
3834 int rc;
3835
3836 if (vc->vc_mode != KD_TEXT)
3837 return -EINVAL;
3838
3839 if (!op->data)
3840 s = NULL;
3841 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0)
3842 return -EFAULT;
3843 else
3844 name[MAX_FONT_NAME - 1] = 0;
3845
3846 acquire_console_sem();
3847 if (vc->vc_sw->con_font_default)
3848 rc = vc->vc_sw->con_font_default(vc, &font, s);
3849 else
3850 rc = -ENOSYS;
3851 release_console_sem();
3852 if (!rc) {
3853 op->width = font.width;
3854 op->height = font.height;
3855 }
3856 return rc;
3857}
3858
3859static int con_font_copy(struct vc_data *vc, struct console_font_op *op)
3860{
3861 int con = op->height;
3862 int rc;
3863
3864 if (vc->vc_mode != KD_TEXT)
3865 return -EINVAL;
3866
3867 acquire_console_sem();
3868 if (!vc->vc_sw->con_font_copy)
3869 rc = -ENOSYS;
3870 else if (con < 0 || !vc_cons_allocated(con))
3871 rc = -ENOTTY;
3872 else if (con == vc->vc_num) /* nothing to do */
3873 rc = 0;
3874 else
3875 rc = vc->vc_sw->con_font_copy(vc, con);
3876 release_console_sem();
3877 return rc;
3878}
3879
3880int con_font_op(struct vc_data *vc, struct console_font_op *op)
3881{
3882 switch (op->op) {
3883 case KD_FONT_OP_SET:
3884 return con_font_set(vc, op);
3885 case KD_FONT_OP_GET:
3886 return con_font_get(vc, op);
3887 case KD_FONT_OP_SET_DEFAULT:
3888 return con_font_default(vc, op);
3889 case KD_FONT_OP_COPY:
3890 return con_font_copy(vc, op);
3891 }
3892 return -ENOSYS;
3893}
3894
3895/*
3896 * Interface exported to selection and vcs.
3897 */
3898
3899/* used by selection */
3900u16 screen_glyph(struct vc_data *vc, int offset)
3901{
3902 u16 w = scr_readw(screenpos(vc, offset, 1));
3903 u16 c = w & 0xff;
3904
3905 if (w & vc->vc_hi_font_mask)
3906 c |= 0x100;
3907 return c;
3908}
3909
3910/* used by vcs - note the word offset */
3911unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed)
3912{
3913 return screenpos(vc, 2 * w_offset, viewed);
3914}
3915
3916void getconsxy(struct vc_data *vc, unsigned char *p)
3917{
3918 p[0] = vc->vc_x;
3919 p[1] = vc->vc_y;
3920}
3921
3922void putconsxy(struct vc_data *vc, unsigned char *p)
3923{
9477e260 3924 hide_cursor(vc);
1da177e4
LT		 3925 gotoxy(vc, p[0], p[1]);
3926 set_cursor(vc);
3927}
3928
3929u16 vcs_scr_readw(struct vc_data *vc, const u16 *org)
3930{
3931 if ((unsigned long)org == vc->vc_pos && softcursor_original != -1)
3932 return softcursor_original;
3933 return scr_readw(org);
3934}
3935
3936void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org)
3937{
3938 scr_writew(val, org);
3939 if ((unsigned long)org == vc->vc_pos) {
3940 softcursor_original = -1;
3941 add_softcursor(vc);
3942 }
3943}
3944
3945/*
3946 * Visible symbols for modules
3947 */
3948
3949EXPORT_SYMBOL(color_table);
3950EXPORT_SYMBOL(default_red);
3951EXPORT_SYMBOL(default_grn);
3952EXPORT_SYMBOL(default_blu);
3953EXPORT_SYMBOL(update_region);
3954EXPORT_SYMBOL(redraw_screen);
3955EXPORT_SYMBOL(vc_resize);
ca9bda00 3956EXPORT_SYMBOL(vc_lock_resize);
1da177e4
LT		 3957EXPORT_SYMBOL(fg_console);
3958EXPORT_SYMBOL(console_blank_hook);
3959EXPORT_SYMBOL(console_blanked);
3960EXPORT_SYMBOL(vc_cons);
3961#ifndef VT_SINGLE_DRIVER
3962EXPORT_SYMBOL(take_over_console);
3963EXPORT_SYMBOL(give_up_console);
3964#endif
kernel source for telekom puls (alcatel/mediatek)