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[PATCH] Small update to CREDITS
[pv_ops_mirror.git] / drivers / char / vt.c
blobb49f03375439d83a8bee35bffa89ba7a3e484fec
1 /*
2 * linux/drivers/char/vt.c
3 *
4 * Copyright (C) 1991, 1992 Linus Torvalds
5 */
6
7 /*
8 * Hopefully this will be a rather complete VT102 implementation.
9 *
10 * Beeping thanks to John T Kohl.
11 *
12 * Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics
13 * Chars, and VT100 enhancements by Peter MacDonald.
14 *
15 * Copy and paste function by Andrew Haylett,
16 * some enhancements by Alessandro Rubini.
17 *
18 * Code to check for different video-cards mostly by Galen Hunt,
19 * <g-hunt@ee.utah.edu>
20 *
21 * Rudimentary ISO 10646/Unicode/UTF-8 character set support by
22 * Markus Kuhn, <mskuhn@immd4.informatik.uni-erlangen.de>.
23 *
24 * Dynamic allocation of consoles, aeb@cwi.nl, May 1994
25 * Resizing of consoles, aeb, 940926
26 *
27 * Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94
28 * <poe@daimi.aau.dk>
29 *
30 * User-defined bell sound, new setterm control sequences and printk
31 * redirection by Martin Mares <mj@k332.feld.cvut.cz> 19-Nov-95
32 *
33 * APM screenblank bug fixed Takashi Manabe <manabe@roy.dsl.tutics.tut.jp>
34 *
35 * Merge with the abstract console driver by Geert Uytterhoeven
36 * <geert@linux-m68k.org>, Jan 1997.
37 *
38 * Original m68k console driver modifications by
39 *
40 * - Arno Griffioen <arno@usn.nl>
41 * - David Carter <carter@cs.bris.ac.uk>
42 *
43 * The abstract console driver provides a generic interface for a text
44 * console. It supports VGA text mode, frame buffer based graphical consoles
45 * and special graphics processors that are only accessible through some
46 * registers (e.g. a TMS340x0 GSP).
47 *
48 * The interface to the hardware is specified using a special structure
49 * (struct consw) which contains function pointers to console operations
50 * (see <linux/console.h> for more information).
51 *
52 * Support for changeable cursor shape
53 * by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997
54 *
55 * Ported to i386 and con_scrolldelta fixed
56 * by Emmanuel Marty <core@ggi-project.org>, April 1998
57 *
58 * Resurrected character buffers in videoram plus lots of other trickery
59 * by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998
60 *
61 * Removed old-style timers, introduced console_timer, made timer
62 * deletion SMP-safe. 17Jun00, Andrew Morton <andrewm@uow.edu.au>
63 *
64 * Removed console_lock, enabled interrupts across all console operations
65 * 13 March 2001, Andrew Morton
66 *
67 * 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
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>
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>
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
106 #define MAX_NR_CON_DRIVER 16
107
108 #define CON_DRIVER_FLAG_MODULE 1
109 #define CON_DRIVER_FLAG_INIT 2
110
111 struct con_driver {
112 const struct consw *con;
113 const char *desc;
114 struct class_device *class_dev;
115 int node;
116 int first;
117 int last;
118 int flag;
119 };
120
121 static struct con_driver registered_con_driver[MAX_NR_CON_DRIVER];
122 const struct consw *conswitchp;
123
124 /* A bitmap for codes <32. A bit of 1 indicates that the code
125 * corresponding to that bit number invokes some special action
126 * (such as cursor movement) and should not be displayed as a
127 * glyph unless the disp_ctrl mode is explicitly enabled.
128 */
129 #define CTRL_ACTION 0x0d00ff81
130 #define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */
131
132 /*
133 * Here is the default bell parameters: 750HZ, 1/8th of a second
134 */
135 #define DEFAULT_BELL_PITCH 750
136 #define DEFAULT_BELL_DURATION (HZ/8)
137
138 extern void vcs_make_sysfs(struct tty_struct *tty);
139 extern void vcs_remove_sysfs(struct tty_struct *tty);
140
141 extern void console_map_init(void);
142 #ifdef CONFIG_PROM_CONSOLE
143 extern void prom_con_init(void);
144 #endif
145 #ifdef CONFIG_MDA_CONSOLE
146 extern int mda_console_init(void);
147 #endif
148
149 struct vc vc_cons [MAX_NR_CONSOLES];
150
151 #ifndef VT_SINGLE_DRIVER
152 static const struct consw *con_driver_map[MAX_NR_CONSOLES];
153 #endif
154
155 static int con_open(struct tty_struct *, struct file *);
156 static void vc_init(struct vc_data *vc, unsigned int rows,
157 unsigned int cols, int do_clear);
158 static void gotoxy(struct vc_data *vc, int new_x, int new_y);
159 static void save_cur(struct vc_data *vc);
160 static void reset_terminal(struct vc_data *vc, int do_clear);
161 static void con_flush_chars(struct tty_struct *tty);
162 static void set_vesa_blanking(char __user *p);
163 static void set_cursor(struct vc_data *vc);
164 static void hide_cursor(struct vc_data *vc);
165 static void console_callback(void *ignored);
166 static void blank_screen_t(unsigned long dummy);
167 static void set_palette(struct vc_data *vc);
168
169 static int printable; /* Is console ready for printing? */
170
171 /*
172 * ignore_poke: don't unblank the screen when things are typed. This is
173 * mainly for the privacy of braille terminal users.
174 */
175 static int ignore_poke;
176
177 int do_poke_blanked_console;
178 int console_blanked;
179
180 static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
181 static int blankinterval = 10*60*HZ;
182 static int vesa_off_interval;
183
184 static DECLARE_WORK(console_work, console_callback, NULL);
185
186 /*
187 * fg_console is the current virtual console,
188 * last_console is the last used one,
189 * want_console is the console we want to switch to,
190 * kmsg_redirect is the console for kernel messages,
191 */
192 int fg_console;
193 int last_console;
194 int want_console = -1;
195 int kmsg_redirect;
196
197 /*
198 * For each existing display, we have a pointer to console currently visible
199 * on that display, allowing consoles other than fg_console to be refreshed
200 * appropriately. Unless the low-level driver supplies its own display_fg
201 * variable, we use this one for the "master display".
202 */
203 static struct vc_data *master_display_fg;
204
205 /*
206 * Unfortunately, we need to delay tty echo when we're currently writing to the
207 * console since the code is (and always was) not re-entrant, so we schedule
208 * all flip requests to process context with schedule-task() and run it from
209 * console_callback().
210 */
211
212 /*
213 * For the same reason, we defer scrollback to the console callback.
214 */
215 static int scrollback_delta;
216
217 /*
218 * Hook so that the power management routines can (un)blank
219 * the console on our behalf.
220 */
221 int (*console_blank_hook)(int);
222
223 static struct timer_list console_timer;
224 static int blank_state;
225 static int blank_timer_expired;
226 enum {
227 blank_off = 0,
228 blank_normal_wait,
229 blank_vesa_wait,
230 };
231
232 /*
233 * Low-Level Functions
234 */
235
236 #define IS_FG(vc) ((vc)->vc_num == fg_console)
237
238 #ifdef VT_BUF_VRAM_ONLY
239 #define DO_UPDATE(vc) 0
240 #else
241 #define DO_UPDATE(vc) CON_IS_VISIBLE(vc)
242 #endif
243
244 static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed)
245 {
246 unsigned short *p;
247
248 if (!viewed)
249 p = (unsigned short *)(vc->vc_origin + offset);
250 else if (!vc->vc_sw->con_screen_pos)
251 p = (unsigned short *)(vc->vc_visible_origin + offset);
252 else
253 p = vc->vc_sw->con_screen_pos(vc, offset);
254 return p;
255 }
256
257 static inline void scrolldelta(int lines)
258 {
259 scrollback_delta += lines;
260 schedule_console_callback();
261 }
262
263 void schedule_console_callback(void)
264 {
265 schedule_work(&console_work);
266 }
267
268 static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
269 {
270 unsigned short *d, *s;
271
272 if (t+nr >= b)
273 nr = b - t - 1;
274 if (b > vc->vc_rows || t >= b || nr < 1)
275 return;
276 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr))
277 return;
278 d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
279 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr));
280 scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row);
281 scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_video_erase_char,
282 vc->vc_size_row * nr);
283 }
284
285 static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
286 {
287 unsigned short *s;
288 unsigned int step;
289
290 if (t+nr >= b)
291 nr = b - t - 1;
292 if (b > vc->vc_rows || t >= b || nr < 1)
293 return;
294 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr))
295 return;
296 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
297 step = vc->vc_cols * nr;
298 scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row);
299 scr_memsetw(s, vc->vc_video_erase_char, 2 * step);
300 }
301
302 static void do_update_region(struct vc_data *vc, unsigned long start, int count)
303 {
304 #ifndef VT_BUF_VRAM_ONLY
305 unsigned int xx, yy, offset;
306 u16 *p;
307
308 p = (u16 *) start;
309 if (!vc->vc_sw->con_getxy) {
310 offset = (start - vc->vc_origin) / 2;
311 xx = offset % vc->vc_cols;
312 yy = offset / vc->vc_cols;
313 } else {
314 int nxx, nyy;
315 start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy);
316 xx = nxx; yy = nyy;
317 }
318 for(;;) {
319 u16 attrib = scr_readw(p) & 0xff00;
320 int startx = xx;
321 u16 *q = p;
322 while (xx < vc->vc_cols && count) {
323 if (attrib != (scr_readw(p) & 0xff00)) {
324 if (p > q)
325 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
326 startx = xx;
327 q = p;
328 attrib = scr_readw(p) & 0xff00;
329 }
330 p++;
331 xx++;
332 count--;
333 }
334 if (p > q)
335 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
336 if (!count)
337 break;
338 xx = 0;
339 yy++;
340 if (vc->vc_sw->con_getxy) {
341 p = (u16 *)start;
342 start = vc->vc_sw->con_getxy(vc, start, NULL, NULL);
343 }
344 }
345 #endif
346 }
347
348 void update_region(struct vc_data *vc, unsigned long start, int count)
349 {
350 WARN_CONSOLE_UNLOCKED();
351
352 if (DO_UPDATE(vc)) {
353 hide_cursor(vc);
354 do_update_region(vc, start, count);
355 set_cursor(vc);
356 }
357 }
358
359 /* Structure of attributes is hardware-dependent */
360
361 static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink, u8 _underline, u8 _reverse)
362 {
363 if (vc->vc_sw->con_build_attr)
364 return vc->vc_sw->con_build_attr(vc, _color, _intensity, _blink, _underline, _reverse);
365
366 #ifndef VT_BUF_VRAM_ONLY
367 /*
368 * ++roman: I completely changed the attribute format for monochrome
369 * mode (!can_do_color). The formerly used MDA (monochrome display
370 * adapter) format didn't allow the combination of certain effects.
371 * Now the attribute is just a bit vector:
372 * Bit 0..1: intensity (0..2)
373 * Bit 2 : underline
374 * Bit 3 : reverse
375 * Bit 7 : blink
376 */
377 {
378 u8 a = vc->vc_color;
379 if (!vc->vc_can_do_color)
380 return _intensity |
381 (_underline ? 4 : 0) |
382 (_reverse ? 8 : 0) |
383 (_blink ? 0x80 : 0);
384 if (_underline)
385 a = (a & 0xf0) | vc->vc_ulcolor;
386 else if (_intensity == 0)
387 a = (a & 0xf0) | vc->vc_ulcolor;
388 if (_reverse)
389 a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77);
390 if (_blink)
391 a ^= 0x80;
392 if (_intensity == 2)
393 a ^= 0x08;
394 if (vc->vc_hi_font_mask == 0x100)
395 a <<= 1;
396 return a;
397 }
398 #else
399 return 0;
400 #endif
401 }
402
403 static void update_attr(struct vc_data *vc)
404 {
405 vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity, vc->vc_blink, vc->vc_underline, vc->vc_reverse ^ vc->vc_decscnm);
406 vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm) << 8) | ' ';
407 }
408
409 /* Note: inverting the screen twice should revert to the original state */
410 void invert_screen(struct vc_data *vc, int offset, int count, int viewed)
411 {
412 unsigned short *p;
413
414 WARN_CONSOLE_UNLOCKED();
415
416 count /= 2;
417 p = screenpos(vc, offset, viewed);
418 if (vc->vc_sw->con_invert_region)
419 vc->vc_sw->con_invert_region(vc, p, count);
420 #ifndef VT_BUF_VRAM_ONLY
421 else {
422 u16 *q = p;
423 int cnt = count;
424 u16 a;
425
426 if (!vc->vc_can_do_color) {
427 while (cnt--) {
428 a = scr_readw(q);
429 a ^= 0x0800;
430 scr_writew(a, q);
431 q++;
432 }
433 } else if (vc->vc_hi_font_mask == 0x100) {
434 while (cnt--) {
435 a = scr_readw(q);
436 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4);
437 scr_writew(a, q);
438 q++;
439 }
440 } else {
441 while (cnt--) {
442 a = scr_readw(q);
443 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4);
444 scr_writew(a, q);
445 q++;
446 }
447 }
448 }
449 #endif
450 if (DO_UPDATE(vc))
451 do_update_region(vc, (unsigned long) p, count);
452 }
453
454 /* used by selection: complement pointer position */
455 void complement_pos(struct vc_data *vc, int offset)
456 {
457 static int old_offset = -1;
458 static unsigned short old;
459 static unsigned short oldx, oldy;
460
461 WARN_CONSOLE_UNLOCKED();
462
463 if (old_offset != -1 && old_offset >= 0 &&
464 old_offset < vc->vc_screenbuf_size) {
465 scr_writew(old, screenpos(vc, old_offset, 1));
466 if (DO_UPDATE(vc))
467 vc->vc_sw->con_putc(vc, old, oldy, oldx);
468 }
469
470 old_offset = offset;
471
472 if (offset != -1 && offset >= 0 &&
473 offset < vc->vc_screenbuf_size) {
474 unsigned short new;
475 unsigned short *p;
476 p = screenpos(vc, offset, 1);
477 old = scr_readw(p);
478 new = old ^ vc->vc_complement_mask;
479 scr_writew(new, p);
480 if (DO_UPDATE(vc)) {
481 oldx = (offset >> 1) % vc->vc_cols;
482 oldy = (offset >> 1) / vc->vc_cols;
483 vc->vc_sw->con_putc(vc, new, oldy, oldx);
484 }
485 }
486
487 }
488
489 static void insert_char(struct vc_data *vc, unsigned int nr)
490 {
491 unsigned short *p, *q = (unsigned short *)vc->vc_pos;
492
493 p = q + vc->vc_cols - nr - vc->vc_x;
494 while (--p >= q)
495 scr_writew(scr_readw(p), p + nr);
496 scr_memsetw(q, vc->vc_video_erase_char, nr * 2);
497 vc->vc_need_wrap = 0;
498 if (DO_UPDATE(vc)) {
499 unsigned short oldattr = vc->vc_attr;
500 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x, vc->vc_y, vc->vc_x + nr, 1,
501 vc->vc_cols - vc->vc_x - nr);
502 vc->vc_attr = vc->vc_video_erase_char >> 8;
503 while (nr--)
504 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y, vc->vc_x + nr);
505 vc->vc_attr = oldattr;
506 }
507 }
508
509 static void delete_char(struct vc_data *vc, unsigned int nr)
510 {
511 unsigned int i = vc->vc_x;
512 unsigned short *p = (unsigned short *)vc->vc_pos;
513
514 while (++i <= vc->vc_cols - nr) {
515 scr_writew(scr_readw(p+nr), p);
516 p++;
517 }
518 scr_memsetw(p, vc->vc_video_erase_char, nr * 2);
519 vc->vc_need_wrap = 0;
520 if (DO_UPDATE(vc)) {
521 unsigned short oldattr = vc->vc_attr;
522 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x + nr, vc->vc_y, vc->vc_x, 1,
523 vc->vc_cols - vc->vc_x - nr);
524 vc->vc_attr = vc->vc_video_erase_char >> 8;
525 while (nr--)
526 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y,
527 vc->vc_cols - 1 - nr);
528 vc->vc_attr = oldattr;
529 }
530 }
531
532 static int softcursor_original;
533
534 static void add_softcursor(struct vc_data *vc)
535 {
536 int i = scr_readw((u16 *) vc->vc_pos);
537 u32 type = vc->vc_cursor_type;
538
539 if (! (type & 0x10)) return;
540 if (softcursor_original != -1) return;
541 softcursor_original = i;
542 i |= ((type >> 8) & 0xff00 );
543 i ^= ((type) & 0xff00 );
544 if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000;
545 if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700;
546 scr_writew(i, (u16 *) vc->vc_pos);
547 if (DO_UPDATE(vc))
548 vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x);
549 }
550
551 static void hide_softcursor(struct vc_data *vc)
552 {
553 if (softcursor_original != -1) {
554 scr_writew(softcursor_original, (u16 *)vc->vc_pos);
555 if (DO_UPDATE(vc))
556 vc->vc_sw->con_putc(vc, softcursor_original,
557 vc->vc_y, vc->vc_x);
558 softcursor_original = -1;
559 }
560 }
561
562 static void hide_cursor(struct vc_data *vc)
563 {
564 if (vc == sel_cons)
565 clear_selection();
566 vc->vc_sw->con_cursor(vc, CM_ERASE);
567 hide_softcursor(vc);
568 }
569
570 static void set_cursor(struct vc_data *vc)
571 {
572 if (!IS_FG(vc) || console_blanked ||
573 vc->vc_mode == KD_GRAPHICS)
574 return;
575 if (vc->vc_deccm) {
576 if (vc == sel_cons)
577 clear_selection();
578 add_softcursor(vc);
579 if ((vc->vc_cursor_type & 0x0f) != 1)
580 vc->vc_sw->con_cursor(vc, CM_DRAW);
581 } else
582 hide_cursor(vc);
583 }
584
585 static void set_origin(struct vc_data *vc)
586 {
587 WARN_CONSOLE_UNLOCKED();
588
589 if (!CON_IS_VISIBLE(vc) ||
590 !vc->vc_sw->con_set_origin ||
591 !vc->vc_sw->con_set_origin(vc))
592 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
593 vc->vc_visible_origin = vc->vc_origin;
594 vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size;
595 vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x;
596 }
597
598 static inline void save_screen(struct vc_data *vc)
599 {
600 WARN_CONSOLE_UNLOCKED();
601
602 if (vc->vc_sw->con_save_screen)
603 vc->vc_sw->con_save_screen(vc);
604 }
605
606 /*
607 * Redrawing of screen
608 */
609
610 static void clear_buffer_attributes(struct vc_data *vc)
611 {
612 unsigned short *p = (unsigned short *)vc->vc_origin;
613 int count = vc->vc_screenbuf_size / 2;
614 int mask = vc->vc_hi_font_mask | 0xff;
615
616 for (; count > 0; count--, p++) {
617 scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p);
618 }
619 }
620
621 void redraw_screen(struct vc_data *vc, int is_switch)
622 {
623 int redraw = 0;
624
625 WARN_CONSOLE_UNLOCKED();
626
627 if (!vc) {
628 /* strange ... */
629 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
630 return;
631 }
632
633 if (is_switch) {
634 struct vc_data *old_vc = vc_cons[fg_console].d;
635 if (old_vc == vc)
636 return;
637 if (!CON_IS_VISIBLE(vc))
638 redraw = 1;
639 *vc->vc_display_fg = vc;
640 fg_console = vc->vc_num;
641 hide_cursor(old_vc);
642 if (!CON_IS_VISIBLE(old_vc)) {
643 save_screen(old_vc);
644 set_origin(old_vc);
645 }
646 } else {
647 hide_cursor(vc);
648 redraw = 1;
649 }
650
651 if (redraw) {
652 int update;
653 int old_was_color = vc->vc_can_do_color;
654
655 set_origin(vc);
656 update = vc->vc_sw->con_switch(vc);
657 set_palette(vc);
658 /*
659 * If console changed from mono<->color, the best we can do
660 * is to clear the buffer attributes. As it currently stands,
661 * rebuilding new attributes from the old buffer is not doable
662 * without overly complex code.
663 */
664 if (old_was_color != vc->vc_can_do_color) {
665 update_attr(vc);
666 clear_buffer_attributes(vc);
667 }
668 if (update && vc->vc_mode != KD_GRAPHICS)
669 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
670 }
671 set_cursor(vc);
672 if (is_switch) {
673 set_leds();
674 compute_shiftstate();
675 }
676 }
677
678 /*
679 * Allocation, freeing and resizing of VTs.
680 */
681
682 int vc_cons_allocated(unsigned int i)
683 {
684 return (i < MAX_NR_CONSOLES && vc_cons[i].d);
685 }
686
687 static void visual_init(struct vc_data *vc, int num, int init)
688 {
689 /* ++Geert: vc->vc_sw->con_init determines console size */
690 if (vc->vc_sw)
691 module_put(vc->vc_sw->owner);
692 vc->vc_sw = conswitchp;
693 #ifndef VT_SINGLE_DRIVER
694 if (con_driver_map[num])
695 vc->vc_sw = con_driver_map[num];
696 #endif
697 __module_get(vc->vc_sw->owner);
698 vc->vc_num = num;
699 vc->vc_display_fg = &master_display_fg;
700 vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir;
701 vc->vc_uni_pagedir = 0;
702 vc->vc_hi_font_mask = 0;
703 vc->vc_complement_mask = 0;
704 vc->vc_can_do_color = 0;
705 vc->vc_sw->con_init(vc, init);
706 if (!vc->vc_complement_mask)
707 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
708 vc->vc_s_complement_mask = vc->vc_complement_mask;
709 vc->vc_size_row = vc->vc_cols << 1;
710 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
711 }
712
713 int vc_allocate(unsigned int currcons) /* return 0 on success */
714 {
715 WARN_CONSOLE_UNLOCKED();
716
717 if (currcons >= MAX_NR_CONSOLES)
718 return -ENXIO;
719 if (!vc_cons[currcons].d) {
720 struct vc_data *vc;
721
722 /* prevent users from taking too much memory */
723 if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE))
724 return -EPERM;
725
726 /* due to the granularity of kmalloc, we waste some memory here */
727 /* the alloc is done in two steps, to optimize the common situation
728 of a 25x80 console (structsize=216, screenbuf_size=4000) */
729 /* although the numbers above are not valid since long ago, the
730 point is still up-to-date and the comment still has its value
731 even if only as a historical artifact. --mj, July 1998 */
732 vc = kmalloc(sizeof(struct vc_data), GFP_KERNEL);
733 if (!vc)
734 return -ENOMEM;
735 memset(vc, 0, sizeof(*vc));
736 vc_cons[currcons].d = vc;
737 visual_init(vc, currcons, 1);
738 if (!*vc->vc_uni_pagedir_loc)
739 con_set_default_unimap(vc);
740 vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL);
741 if (!vc->vc_screenbuf) {
742 kfree(vc);
743 vc_cons[currcons].d = NULL;
744 return -ENOMEM;
745 }
746 vc->vc_kmalloced = 1;
747 vc_init(vc, vc->vc_rows, vc->vc_cols, 1);
748 }
749 return 0;
750 }
751
752 static inline int resize_screen(struct vc_data *vc, int width, int height)
753 {
754 /* Resizes the resolution of the display adapater */
755 int err = 0;
756
757 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize)
758 err = vc->vc_sw->con_resize(vc, width, height);
759 return err;
760 }
761
762 /*
763 * Change # of rows and columns (0 means unchanged/the size of fg_console)
764 * [this is to be used together with some user program
765 * like resize that changes the hardware videomode]
766 */
767 #define VC_RESIZE_MAXCOL (32767)
768 #define VC_RESIZE_MAXROW (32767)
769 int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int lines)
770 {
771 unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0;
772 unsigned int old_cols, old_rows, old_row_size, old_screen_size;
773 unsigned int new_cols, new_rows, new_row_size, new_screen_size;
774 unsigned int end;
775 unsigned short *newscreen;
776
777 WARN_CONSOLE_UNLOCKED();
778
779 if (!vc)
780 return -ENXIO;
781
782 if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW)
783 return -EINVAL;
784
785 new_cols = (cols ? cols : vc->vc_cols);
786 new_rows = (lines ? lines : vc->vc_rows);
787 new_row_size = new_cols << 1;
788 new_screen_size = new_row_size * new_rows;
789
790 if (new_cols == vc->vc_cols && new_rows == vc->vc_rows)
791 return 0;
792
793 newscreen = (unsigned short *) kmalloc(new_screen_size, GFP_USER);
794 if (!newscreen)
795 return -ENOMEM;
796
797 old_rows = vc->vc_rows;
798 old_cols = vc->vc_cols;
799 old_row_size = vc->vc_size_row;
800 old_screen_size = vc->vc_screenbuf_size;
801
802 err = resize_screen(vc, new_cols, new_rows);
803 if (err) {
804 kfree(newscreen);
805 return err;
806 }
807
808 vc->vc_rows = new_rows;
809 vc->vc_cols = new_cols;
810 vc->vc_size_row = new_row_size;
811 vc->vc_screenbuf_size = new_screen_size;
812
813 rlth = min(old_row_size, new_row_size);
814 rrem = new_row_size - rlth;
815 old_origin = vc->vc_origin;
816 new_origin = (long) newscreen;
817 new_scr_end = new_origin + new_screen_size;
818
819 if (vc->vc_y > new_rows) {
820 if (old_rows - vc->vc_y < new_rows) {
821 /*
822 * Cursor near the bottom, copy contents from the
823 * bottom of buffer
824 */
825 old_origin += (old_rows - new_rows) * old_row_size;
826 end = vc->vc_scr_end;
827 } else {
828 /*
829 * Cursor is in no man's land, copy 1/2 screenful
830 * from the top and bottom of cursor position
831 */
832 old_origin += (vc->vc_y - new_rows/2) * old_row_size;
833 end = old_origin + (old_row_size * new_rows);
834 }
835 } else
836 /*
837 * Cursor near the top, copy contents from the top of buffer
838 */
839 end = (old_rows > new_rows) ? old_origin +
840 (old_row_size * new_rows) :
841 vc->vc_scr_end;
842
843 update_attr(vc);
844
845 while (old_origin < end) {
846 scr_memcpyw((unsigned short *) new_origin,
847 (unsigned short *) old_origin, rlth);
848 if (rrem)
849 scr_memsetw((void *)(new_origin + rlth),
850 vc->vc_video_erase_char, rrem);
851 old_origin += old_row_size;
852 new_origin += new_row_size;
853 }
854 if (new_scr_end > new_origin)
855 scr_memsetw((void *)new_origin, vc->vc_video_erase_char,
856 new_scr_end - new_origin);
857 if (vc->vc_kmalloced)
858 kfree(vc->vc_screenbuf);
859 vc->vc_screenbuf = newscreen;
860 vc->vc_kmalloced = 1;
861 vc->vc_screenbuf_size = new_screen_size;
862 set_origin(vc);
863
864 /* do part of a reset_terminal() */
865 vc->vc_top = 0;
866 vc->vc_bottom = vc->vc_rows;
867 gotoxy(vc, vc->vc_x, vc->vc_y);
868 save_cur(vc);
869
870 if (vc->vc_tty) {
871 struct winsize ws, *cws = &vc->vc_tty->winsize;
872
873 memset(&ws, 0, sizeof(ws));
874 ws.ws_row = vc->vc_rows;
875 ws.ws_col = vc->vc_cols;
876 ws.ws_ypixel = vc->vc_scan_lines;
877 if ((ws.ws_row != cws->ws_row || ws.ws_col != cws->ws_col) &&
878 vc->vc_tty->pgrp > 0)
879 kill_pg(vc->vc_tty->pgrp, SIGWINCH, 1);
880 *cws = ws;
881 }
882
883 if (CON_IS_VISIBLE(vc))
884 update_screen(vc);
885 return err;
886 }
887
888 int vc_lock_resize(struct vc_data *vc, unsigned int cols, unsigned int lines)
889 {
890 int rc;
891
892 acquire_console_sem();
893 rc = vc_resize(vc, cols, lines);
894 release_console_sem();
895 return rc;
896 }
897
898 void vc_deallocate(unsigned int currcons)
899 {
900 WARN_CONSOLE_UNLOCKED();
901
902 if (vc_cons_allocated(currcons)) {
903 struct vc_data *vc = vc_cons[currcons].d;
904 vc->vc_sw->con_deinit(vc);
905 module_put(vc->vc_sw->owner);
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
933 unsigned 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 */
937 int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
938 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
939 int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
940 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
941 int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
942 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
943
944 /*
945 * gotoxy() must verify all boundaries, because the arguments
946 * might also be negative. If the given position is out of
947 * bounds, the cursor is placed at the nearest margin.
948 */
949 static void gotoxy(struct vc_data *vc, int new_x, int new_y)
950 {
951 int min_y, max_y;
952
953 if (new_x < 0)
954 vc->vc_x = 0;
955 else {
956 if (new_x >= vc->vc_cols)
957 vc->vc_x = vc->vc_cols - 1;
958 else
959 vc->vc_x = new_x;
960 }
961
962 if (vc->vc_decom) {
963 min_y = vc->vc_top;
964 max_y = vc->vc_bottom;
965 } else {
966 min_y = 0;
967 max_y = vc->vc_rows;
968 }
969 if (new_y < min_y)
970 vc->vc_y = min_y;
971 else if (new_y >= max_y)
972 vc->vc_y = max_y - 1;
973 else
974 vc->vc_y = new_y;
975 vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1);
976 vc->vc_need_wrap = 0;
977 }
978
979 /* for absolute user moves, when decom is set */
980 static void gotoxay(struct vc_data *vc, int new_x, int new_y)
981 {
982 gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y);
983 }
984
985 void scrollback(struct vc_data *vc, int lines)
986 {
987 if (!lines)
988 lines = vc->vc_rows / 2;
989 scrolldelta(-lines);
990 }
991
992 void scrollfront(struct vc_data *vc, int lines)
993 {
994 if (!lines)
995 lines = vc->vc_rows / 2;
996 scrolldelta(lines);
997 }
998
999 static void lf(struct vc_data *vc)
1000 {
1001 /* don't scroll if above bottom of scrolling region, or
1002 * if below scrolling region
1003 */
1004 if (vc->vc_y + 1 == vc->vc_bottom)
1005 scrup(vc, vc->vc_top, vc->vc_bottom, 1);
1006 else if (vc->vc_y < vc->vc_rows - 1) {
1007 vc->vc_y++;
1008 vc->vc_pos += vc->vc_size_row;
1009 }
1010 vc->vc_need_wrap = 0;
1011 }
1012
1013 static void ri(struct vc_data *vc)
1014 {
1015 /* don't scroll if below top of scrolling region, or
1016 * if above scrolling region
1017 */
1018 if (vc->vc_y == vc->vc_top)
1019 scrdown(vc, vc->vc_top, vc->vc_bottom, 1);
1020 else if (vc->vc_y > 0) {
1021 vc->vc_y--;
1022 vc->vc_pos -= vc->vc_size_row;
1023 }
1024 vc->vc_need_wrap = 0;
1025 }
1026
1027 static inline void cr(struct vc_data *vc)
1028 {
1029 vc->vc_pos -= vc->vc_x << 1;
1030 vc->vc_need_wrap = vc->vc_x = 0;
1031 }
1032
1033 static inline void bs(struct vc_data *vc)
1034 {
1035 if (vc->vc_x) {
1036 vc->vc_pos -= 2;
1037 vc->vc_x--;
1038 vc->vc_need_wrap = 0;
1039 }
1040 }
1041
1042 static inline void del(struct vc_data *vc)
1043 {
1044 /* ignored */
1045 }
1046
1047 static void csi_J(struct vc_data *vc, int vpar)
1048 {
1049 unsigned int count;
1050 unsigned short * start;
1051
1052 switch (vpar) {
1053 case 0: /* erase from cursor to end of display */
1054 count = (vc->vc_scr_end - vc->vc_pos) >> 1;
1055 start = (unsigned short *)vc->vc_pos;
1056 if (DO_UPDATE(vc)) {
1057 /* do in two stages */
1058 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1059 vc->vc_cols - vc->vc_x);
1060 vc->vc_sw->con_clear(vc, vc->vc_y + 1, 0,
1061 vc->vc_rows - vc->vc_y - 1,
1062 vc->vc_cols);
1063 }
1064 break;
1065 case 1: /* erase from start to cursor */
1066 count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1;
1067 start = (unsigned short *)vc->vc_origin;
1068 if (DO_UPDATE(vc)) {
1069 /* do in two stages */
1070 vc->vc_sw->con_clear(vc, 0, 0, vc->vc_y,
1071 vc->vc_cols);
1072 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1073 vc->vc_x + 1);
1074 }
1075 break;
1076 case 2: /* erase whole display */
1077 count = vc->vc_cols * vc->vc_rows;
1078 start = (unsigned short *)vc->vc_origin;
1079 if (DO_UPDATE(vc))
1080 vc->vc_sw->con_clear(vc, 0, 0,
1081 vc->vc_rows,
1082 vc->vc_cols);
1083 break;
1084 default:
1085 return;
1086 }
1087 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1088 vc->vc_need_wrap = 0;
1089 }
1090
1091 static void csi_K(struct vc_data *vc, int vpar)
1092 {
1093 unsigned int count;
1094 unsigned short * start;
1095
1096 switch (vpar) {
1097 case 0: /* erase from cursor to end of line */
1098 count = vc->vc_cols - vc->vc_x;
1099 start = (unsigned short *)vc->vc_pos;
1100 if (DO_UPDATE(vc))
1101 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1102 vc->vc_cols - vc->vc_x);
1103 break;
1104 case 1: /* erase from start of line to cursor */
1105 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1106 count = vc->vc_x + 1;
1107 if (DO_UPDATE(vc))
1108 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1109 vc->vc_x + 1);
1110 break;
1111 case 2: /* erase whole line */
1112 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1113 count = vc->vc_cols;
1114 if (DO_UPDATE(vc))
1115 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1116 vc->vc_cols);
1117 break;
1118 default:
1119 return;
1120 }
1121 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1122 vc->vc_need_wrap = 0;
1123 }
1124
1125 static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */
1126 { /* not vt100? */
1127 int count;
1128
1129 if (!vpar)
1130 vpar++;
1131 count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar;
1132
1133 scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count);
1134 if (DO_UPDATE(vc))
1135 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count);
1136 vc->vc_need_wrap = 0;
1137 }
1138
1139 static void default_attr(struct vc_data *vc)
1140 {
1141 vc->vc_intensity = 1;
1142 vc->vc_underline = 0;
1143 vc->vc_reverse = 0;
1144 vc->vc_blink = 0;
1145 vc->vc_color = vc->vc_def_color;
1146 }
1147
1148 /* console_sem is held */
1149 static void csi_m(struct vc_data *vc)
1150 {
1151 int i;
1152
1153 for (i = 0; i <= vc->vc_npar; i++)
1154 switch (vc->vc_par[i]) {
1155 case 0: /* all attributes off */
1156 default_attr(vc);
1157 break;
1158 case 1:
1159 vc->vc_intensity = 2;
1160 break;
1161 case 2:
1162 vc->vc_intensity = 0;
1163 break;
1164 case 4:
1165 vc->vc_underline = 1;
1166 break;
1167 case 5:
1168 vc->vc_blink = 1;
1169 break;
1170 case 7:
1171 vc->vc_reverse = 1;
1172 break;
1173 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1174 * Select primary font, don't display
1175 * control chars if defined, don't set
1176 * bit 8 on output.
1177 */
1178 vc->vc_translate = set_translate(vc->vc_charset == 0
1179 ? vc->vc_G0_charset
1180 : vc->vc_G1_charset, vc);
1181 vc->vc_disp_ctrl = 0;
1182 vc->vc_toggle_meta = 0;
1183 break;
1184 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1185 * Select first alternate font, lets
1186 * chars < 32 be displayed as ROM chars.
1187 */
1188 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1189 vc->vc_disp_ctrl = 1;
1190 vc->vc_toggle_meta = 0;
1191 break;
1192 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1193 * Select second alternate font, toggle
1194 * high bit before displaying as ROM char.
1195 */
1196 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1197 vc->vc_disp_ctrl = 1;
1198 vc->vc_toggle_meta = 1;
1199 break;
1200 case 21:
1201 case 22:
1202 vc->vc_intensity = 1;
1203 break;
1204 case 24:
1205 vc->vc_underline = 0;
1206 break;
1207 case 25:
1208 vc->vc_blink = 0;
1209 break;
1210 case 27:
1211 vc->vc_reverse = 0;
1212 break;
1213 case 38: /* ANSI X3.64-1979 (SCO-ish?)
1214 * Enables underscore, white foreground
1215 * with white underscore (Linux - use
1216 * default foreground).
1217 */
1218 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1219 vc->vc_underline = 1;
1220 break;
1221 case 39: /* ANSI X3.64-1979 (SCO-ish?)
1222 * Disable underline option.
1223 * Reset colour to default? It did this
1224 * before...
1225 */
1226 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1227 vc->vc_underline = 0;
1228 break;
1229 case 49:
1230 vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f);
1231 break;
1232 default:
1233 if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37)
1234 vc->vc_color = color_table[vc->vc_par[i] - 30]
1235 | (vc->vc_color & 0xf0);
1236 else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47)
1237 vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4)
1238 | (vc->vc_color & 0x0f);
1239 break;
1240 }
1241 update_attr(vc);
1242 }
1243
1244 static void respond_string(const char *p, struct tty_struct *tty)
1245 {
1246 while (*p) {
1247 tty_insert_flip_char(tty, *p, 0);
1248 p++;
1249 }
1250 con_schedule_flip(tty);
1251 }
1252
1253 static void cursor_report(struct vc_data *vc, struct tty_struct *tty)
1254 {
1255 char buf[40];
1256
1257 sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1);
1258 respond_string(buf, tty);
1259 }
1260
1261 static inline void status_report(struct tty_struct *tty)
1262 {
1263 respond_string("\033[0n", tty); /* Terminal ok */
1264 }
1265
1266 static inline void respond_ID(struct tty_struct * tty)
1267 {
1268 respond_string(VT102ID, tty);
1269 }
1270
1271 void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry)
1272 {
1273 char buf[8];
1274
1275 sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx),
1276 (char)('!' + mry));
1277 respond_string(buf, tty);
1278 }
1279
1280 /* invoked via ioctl(TIOCLINUX) and through set_selection */
1281 int mouse_reporting(void)
1282 {
1283 return vc_cons[fg_console].d->vc_report_mouse;
1284 }
1285
1286 /* console_sem is held */
1287 static void set_mode(struct vc_data *vc, int on_off)
1288 {
1289 int i;
1290
1291 for (i = 0; i <= vc->vc_npar; i++)
1292 if (vc->vc_ques) {
1293 switch(vc->vc_par[i]) { /* DEC private modes set/reset */
1294 case 1: /* Cursor keys send ^[Ox/^[[x */
1295 if (on_off)
1296 set_kbd(vc, decckm);
1297 else
1298 clr_kbd(vc, decckm);
1299 break;
1300 case 3: /* 80/132 mode switch unimplemented */
1301 vc->vc_deccolm = on_off;
1302 #if 0
1303 vc_resize(deccolm ? 132 : 80, vc->vc_rows);
1304 /* this alone does not suffice; some user mode
1305 utility has to change the hardware regs */
1306 #endif
1307 break;
1308 case 5: /* Inverted screen on/off */
1309 if (vc->vc_decscnm != on_off) {
1310 vc->vc_decscnm = on_off;
1311 invert_screen(vc, 0, vc->vc_screenbuf_size, 0);
1312 update_attr(vc);
1313 }
1314 break;
1315 case 6: /* Origin relative/absolute */
1316 vc->vc_decom = on_off;
1317 gotoxay(vc, 0, 0);
1318 break;
1319 case 7: /* Autowrap on/off */
1320 vc->vc_decawm = on_off;
1321 break;
1322 case 8: /* Autorepeat on/off */
1323 if (on_off)
1324 set_kbd(vc, decarm);
1325 else
1326 clr_kbd(vc, decarm);
1327 break;
1328 case 9:
1329 vc->vc_report_mouse = on_off ? 1 : 0;
1330 break;
1331 case 25: /* Cursor on/off */
1332 vc->vc_deccm = on_off;
1333 break;
1334 case 1000:
1335 vc->vc_report_mouse = on_off ? 2 : 0;
1336 break;
1337 }
1338 } else {
1339 switch(vc->vc_par[i]) { /* ANSI modes set/reset */
1340 case 3: /* Monitor (display ctrls) */
1341 vc->vc_disp_ctrl = on_off;
1342 break;
1343 case 4: /* Insert Mode on/off */
1344 vc->vc_decim = on_off;
1345 break;
1346 case 20: /* Lf, Enter == CrLf/Lf */
1347 if (on_off)
1348 set_kbd(vc, lnm);
1349 else
1350 clr_kbd(vc, lnm);
1351 break;
1352 }
1353 }
1354 }
1355
1356 /* console_sem is held */
1357 static void setterm_command(struct vc_data *vc)
1358 {
1359 switch(vc->vc_par[0]) {
1360 case 1: /* set color for underline mode */
1361 if (vc->vc_can_do_color &&
1362 vc->vc_par[1] < 16) {
1363 vc->vc_ulcolor = color_table[vc->vc_par[1]];
1364 if (vc->vc_underline)
1365 update_attr(vc);
1366 }
1367 break;
1368 case 2: /* set color for half intensity mode */
1369 if (vc->vc_can_do_color &&
1370 vc->vc_par[1] < 16) {
1371 vc->vc_halfcolor = color_table[vc->vc_par[1]];
1372 if (vc->vc_intensity == 0)
1373 update_attr(vc);
1374 }
1375 break;
1376 case 8: /* store colors as defaults */
1377 vc->vc_def_color = vc->vc_attr;
1378 if (vc->vc_hi_font_mask == 0x100)
1379 vc->vc_def_color >>= 1;
1380 default_attr(vc);
1381 update_attr(vc);
1382 break;
1383 case 9: /* set blanking interval */
1384 blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1385 poke_blanked_console();
1386 break;
1387 case 10: /* set bell frequency in Hz */
1388 if (vc->vc_npar >= 1)
1389 vc->vc_bell_pitch = vc->vc_par[1];
1390 else
1391 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1392 break;
1393 case 11: /* set bell duration in msec */
1394 if (vc->vc_npar >= 1)
1395 vc->vc_bell_duration = (vc->vc_par[1] < 2000) ?
1396 vc->vc_par[1] * HZ / 1000 : 0;
1397 else
1398 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1399 break;
1400 case 12: /* bring specified console to the front */
1401 if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1))
1402 set_console(vc->vc_par[1] - 1);
1403 break;
1404 case 13: /* unblank the screen */
1405 poke_blanked_console();
1406 break;
1407 case 14: /* set vesa powerdown interval */
1408 vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1409 break;
1410 case 15: /* activate the previous console */
1411 set_console(last_console);
1412 break;
1413 }
1414 }
1415
1416 /* console_sem is held */
1417 static void csi_at(struct vc_data *vc, unsigned int nr)
1418 {
1419 if (nr > vc->vc_cols - vc->vc_x)
1420 nr = vc->vc_cols - vc->vc_x;
1421 else if (!nr)
1422 nr = 1;
1423 insert_char(vc, nr);
1424 }
1425
1426 /* console_sem is held */
1427 static void csi_L(struct vc_data *vc, unsigned int nr)
1428 {
1429 if (nr > vc->vc_rows - vc->vc_y)
1430 nr = vc->vc_rows - vc->vc_y;
1431 else if (!nr)
1432 nr = 1;
1433 scrdown(vc, vc->vc_y, vc->vc_bottom, nr);
1434 vc->vc_need_wrap = 0;
1435 }
1436
1437 /* console_sem is held */
1438 static void csi_P(struct vc_data *vc, unsigned int nr)
1439 {
1440 if (nr > vc->vc_cols - vc->vc_x)
1441 nr = vc->vc_cols - vc->vc_x;
1442 else if (!nr)
1443 nr = 1;
1444 delete_char(vc, nr);
1445 }
1446
1447 /* console_sem is held */
1448 static void csi_M(struct vc_data *vc, unsigned int nr)
1449 {
1450 if (nr > vc->vc_rows - vc->vc_y)
1451 nr = vc->vc_rows - vc->vc_y;
1452 else if (!nr)
1453 nr=1;
1454 scrup(vc, vc->vc_y, vc->vc_bottom, nr);
1455 vc->vc_need_wrap = 0;
1456 }
1457
1458 /* console_sem is held (except via vc_init->reset_terminal */
1459 static void save_cur(struct vc_data *vc)
1460 {
1461 vc->vc_saved_x = vc->vc_x;
1462 vc->vc_saved_y = vc->vc_y;
1463 vc->vc_s_intensity = vc->vc_intensity;
1464 vc->vc_s_underline = vc->vc_underline;
1465 vc->vc_s_blink = vc->vc_blink;
1466 vc->vc_s_reverse = vc->vc_reverse;
1467 vc->vc_s_charset = vc->vc_charset;
1468 vc->vc_s_color = vc->vc_color;
1469 vc->vc_saved_G0 = vc->vc_G0_charset;
1470 vc->vc_saved_G1 = vc->vc_G1_charset;
1471 }
1472
1473 /* console_sem is held */
1474 static void restore_cur(struct vc_data *vc)
1475 {
1476 gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y);
1477 vc->vc_intensity = vc->vc_s_intensity;
1478 vc->vc_underline = vc->vc_s_underline;
1479 vc->vc_blink = vc->vc_s_blink;
1480 vc->vc_reverse = vc->vc_s_reverse;
1481 vc->vc_charset = vc->vc_s_charset;
1482 vc->vc_color = vc->vc_s_color;
1483 vc->vc_G0_charset = vc->vc_saved_G0;
1484 vc->vc_G1_charset = vc->vc_saved_G1;
1485 vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc);
1486 update_attr(vc);
1487 vc->vc_need_wrap = 0;
1488 }
1489
1490 enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey,
1491 EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd,
1492 ESpalette };
1493
1494 /* console_sem is held (except via vc_init()) */
1495 static void reset_terminal(struct vc_data *vc, int do_clear)
1496 {
1497 vc->vc_top = 0;
1498 vc->vc_bottom = vc->vc_rows;
1499 vc->vc_state = ESnormal;
1500 vc->vc_ques = 0;
1501 vc->vc_translate = set_translate(LAT1_MAP, vc);
1502 vc->vc_G0_charset = LAT1_MAP;
1503 vc->vc_G1_charset = GRAF_MAP;
1504 vc->vc_charset = 0;
1505 vc->vc_need_wrap = 0;
1506 vc->vc_report_mouse = 0;
1507 vc->vc_utf = 0;
1508 vc->vc_utf_count = 0;
1509
1510 vc->vc_disp_ctrl = 0;
1511 vc->vc_toggle_meta = 0;
1512
1513 vc->vc_decscnm = 0;
1514 vc->vc_decom = 0;
1515 vc->vc_decawm = 1;
1516 vc->vc_deccm = 1;
1517 vc->vc_decim = 0;
1518
1519 set_kbd(vc, decarm);
1520 clr_kbd(vc, decckm);
1521 clr_kbd(vc, kbdapplic);
1522 clr_kbd(vc, lnm);
1523 kbd_table[vc->vc_num].lockstate = 0;
1524 kbd_table[vc->vc_num].slockstate = 0;
1525 kbd_table[vc->vc_num].ledmode = LED_SHOW_FLAGS;
1526 kbd_table[vc->vc_num].ledflagstate = kbd_table[vc->vc_num].default_ledflagstate;
1527 /* do not do set_leds here because this causes an endless tasklet loop
1528 when the keyboard hasn't been initialized yet */
1529
1530 vc->vc_cursor_type = CUR_DEFAULT;
1531 vc->vc_complement_mask = vc->vc_s_complement_mask;
1532
1533 default_attr(vc);
1534 update_attr(vc);
1535
1536 vc->vc_tab_stop[0] = 0x01010100;
1537 vc->vc_tab_stop[1] =
1538 vc->vc_tab_stop[2] =
1539 vc->vc_tab_stop[3] =
1540 vc->vc_tab_stop[4] = 0x01010101;
1541
1542 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1543 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1544
1545 gotoxy(vc, 0, 0);
1546 save_cur(vc);
1547 if (do_clear)
1548 csi_J(vc, 2);
1549 }
1550
1551 /* console_sem is held */
1552 static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
1553 {
1554 /*
1555 * Control characters can be used in the _middle_
1556 * of an escape sequence.
1557 */
1558 switch (c) {
1559 case 0:
1560 return;
1561 case 7:
1562 if (vc->vc_bell_duration)
1563 kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration);
1564 return;
1565 case 8:
1566 bs(vc);
1567 return;
1568 case 9:
1569 vc->vc_pos -= (vc->vc_x << 1);
1570 while (vc->vc_x < vc->vc_cols - 1) {
1571 vc->vc_x++;
1572 if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31)))
1573 break;
1574 }
1575 vc->vc_pos += (vc->vc_x << 1);
1576 return;
1577 case 10: case 11: case 12:
1578 lf(vc);
1579 if (!is_kbd(vc, lnm))
1580 return;
1581 case 13:
1582 cr(vc);
1583 return;
1584 case 14:
1585 vc->vc_charset = 1;
1586 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1587 vc->vc_disp_ctrl = 1;
1588 return;
1589 case 15:
1590 vc->vc_charset = 0;
1591 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1592 vc->vc_disp_ctrl = 0;
1593 return;
1594 case 24: case 26:
1595 vc->vc_state = ESnormal;
1596 return;
1597 case 27:
1598 vc->vc_state = ESesc;
1599 return;
1600 case 127:
1601 del(vc);
1602 return;
1603 case 128+27:
1604 vc->vc_state = ESsquare;
1605 return;
1606 }
1607 switch(vc->vc_state) {
1608 case ESesc:
1609 vc->vc_state = ESnormal;
1610 switch (c) {
1611 case '[':
1612 vc->vc_state = ESsquare;
1613 return;
1614 case ']':
1615 vc->vc_state = ESnonstd;
1616 return;
1617 case '%':
1618 vc->vc_state = ESpercent;
1619 return;
1620 case 'E':
1621 cr(vc);
1622 lf(vc);
1623 return;
1624 case 'M':
1625 ri(vc);
1626 return;
1627 case 'D':
1628 lf(vc);
1629 return;
1630 case 'H':
1631 vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31));
1632 return;
1633 case 'Z':
1634 respond_ID(tty);
1635 return;
1636 case '7':
1637 save_cur(vc);
1638 return;
1639 case '8':
1640 restore_cur(vc);
1641 return;
1642 case '(':
1643 vc->vc_state = ESsetG0;
1644 return;
1645 case ')':
1646 vc->vc_state = ESsetG1;
1647 return;
1648 case '#':
1649 vc->vc_state = EShash;
1650 return;
1651 case 'c':
1652 reset_terminal(vc, 1);
1653 return;
1654 case '>': /* Numeric keypad */
1655 clr_kbd(vc, kbdapplic);
1656 return;
1657 case '=': /* Appl. keypad */
1658 set_kbd(vc, kbdapplic);
1659 return;
1660 }
1661 return;
1662 case ESnonstd:
1663 if (c=='P') { /* palette escape sequence */
1664 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1665 vc->vc_par[vc->vc_npar] = 0;
1666 vc->vc_npar = 0;
1667 vc->vc_state = ESpalette;
1668 return;
1669 } else if (c=='R') { /* reset palette */
1670 reset_palette(vc);
1671 vc->vc_state = ESnormal;
1672 } else
1673 vc->vc_state = ESnormal;
1674 return;
1675 case ESpalette:
1676 if ( (c>='0'&&c<='9') || (c>='A'&&c<='F') || (c>='a'&&c<='f') ) {
1677 vc->vc_par[vc->vc_npar++] = (c > '9' ? (c & 0xDF) - 'A' + 10 : c - '0');
1678 if (vc->vc_npar == 7) {
1679 int i = vc->vc_par[0] * 3, j = 1;
1680 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1681 vc->vc_palette[i++] += vc->vc_par[j++];
1682 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1683 vc->vc_palette[i++] += vc->vc_par[j++];
1684 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1685 vc->vc_palette[i] += vc->vc_par[j];
1686 set_palette(vc);
1687 vc->vc_state = ESnormal;
1688 }
1689 } else
1690 vc->vc_state = ESnormal;
1691 return;
1692 case ESsquare:
1693 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1694 vc->vc_par[vc->vc_npar] = 0;
1695 vc->vc_npar = 0;
1696 vc->vc_state = ESgetpars;
1697 if (c == '[') { /* Function key */
1698 vc->vc_state=ESfunckey;
1699 return;
1700 }
1701 vc->vc_ques = (c == '?');
1702 if (vc->vc_ques)
1703 return;
1704 case ESgetpars:
1705 if (c == ';' && vc->vc_npar < NPAR - 1) {
1706 vc->vc_npar++;
1707 return;
1708 } else if (c>='0' && c<='9') {
1709 vc->vc_par[vc->vc_npar] *= 10;
1710 vc->vc_par[vc->vc_npar] += c - '0';
1711 return;
1712 } else
1713 vc->vc_state = ESgotpars;
1714 case ESgotpars:
1715 vc->vc_state = ESnormal;
1716 switch(c) {
1717 case 'h':
1718 set_mode(vc, 1);
1719 return;
1720 case 'l':
1721 set_mode(vc, 0);
1722 return;
1723 case 'c':
1724 if (vc->vc_ques) {
1725 if (vc->vc_par[0])
1726 vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16);
1727 else
1728 vc->vc_cursor_type = CUR_DEFAULT;
1729 return;
1730 }
1731 break;
1732 case 'm':
1733 if (vc->vc_ques) {
1734 clear_selection();
1735 if (vc->vc_par[0])
1736 vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1];
1737 else
1738 vc->vc_complement_mask = vc->vc_s_complement_mask;
1739 return;
1740 }
1741 break;
1742 case 'n':
1743 if (!vc->vc_ques) {
1744 if (vc->vc_par[0] == 5)
1745 status_report(tty);
1746 else if (vc->vc_par[0] == 6)
1747 cursor_report(vc, tty);
1748 }
1749 return;
1750 }
1751 if (vc->vc_ques) {
1752 vc->vc_ques = 0;
1753 return;
1754 }
1755 switch(c) {
1756 case 'G': case '`':
1757 if (vc->vc_par[0])
1758 vc->vc_par[0]--;
1759 gotoxy(vc, vc->vc_par[0], vc->vc_y);
1760 return;
1761 case 'A':
1762 if (!vc->vc_par[0])
1763 vc->vc_par[0]++;
1764 gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]);
1765 return;
1766 case 'B': case 'e':
1767 if (!vc->vc_par[0])
1768 vc->vc_par[0]++;
1769 gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]);
1770 return;
1771 case 'C': case 'a':
1772 if (!vc->vc_par[0])
1773 vc->vc_par[0]++;
1774 gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y);
1775 return;
1776 case 'D':
1777 if (!vc->vc_par[0])
1778 vc->vc_par[0]++;
1779 gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y);
1780 return;
1781 case 'E':
1782 if (!vc->vc_par[0])
1783 vc->vc_par[0]++;
1784 gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]);
1785 return;
1786 case 'F':
1787 if (!vc->vc_par[0])
1788 vc->vc_par[0]++;
1789 gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]);
1790 return;
1791 case 'd':
1792 if (vc->vc_par[0])
1793 vc->vc_par[0]--;
1794 gotoxay(vc, vc->vc_x ,vc->vc_par[0]);
1795 return;
1796 case 'H': case 'f':
1797 if (vc->vc_par[0])
1798 vc->vc_par[0]--;
1799 if (vc->vc_par[1])
1800 vc->vc_par[1]--;
1801 gotoxay(vc, vc->vc_par[1], vc->vc_par[0]);
1802 return;
1803 case 'J':
1804 csi_J(vc, vc->vc_par[0]);
1805 return;
1806 case 'K':
1807 csi_K(vc, vc->vc_par[0]);
1808 return;
1809 case 'L':
1810 csi_L(vc, vc->vc_par[0]);
1811 return;
1812 case 'M':
1813 csi_M(vc, vc->vc_par[0]);
1814 return;
1815 case 'P':
1816 csi_P(vc, vc->vc_par[0]);
1817 return;
1818 case 'c':
1819 if (!vc->vc_par[0])
1820 respond_ID(tty);
1821 return;
1822 case 'g':
1823 if (!vc->vc_par[0])
1824 vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31));
1825 else if (vc->vc_par[0] == 3) {
1826 vc->vc_tab_stop[0] =
1827 vc->vc_tab_stop[1] =
1828 vc->vc_tab_stop[2] =
1829 vc->vc_tab_stop[3] =
1830 vc->vc_tab_stop[4] = 0;
1831 }
1832 return;
1833 case 'm':
1834 csi_m(vc);
1835 return;
1836 case 'q': /* DECLL - but only 3 leds */
1837 /* map 0,1,2,3 to 0,1,2,4 */
1838 if (vc->vc_par[0] < 4)
1839 setledstate(kbd_table + vc->vc_num,
1840 (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4);
1841 return;
1842 case 'r':
1843 if (!vc->vc_par[0])
1844 vc->vc_par[0]++;
1845 if (!vc->vc_par[1])
1846 vc->vc_par[1] = vc->vc_rows;
1847 /* Minimum allowed region is 2 lines */
1848 if (vc->vc_par[0] < vc->vc_par[1] &&
1849 vc->vc_par[1] <= vc->vc_rows) {
1850 vc->vc_top = vc->vc_par[0] - 1;
1851 vc->vc_bottom = vc->vc_par[1];
1852 gotoxay(vc, 0, 0);
1853 }
1854 return;
1855 case 's':
1856 save_cur(vc);
1857 return;
1858 case 'u':
1859 restore_cur(vc);
1860 return;
1861 case 'X':
1862 csi_X(vc, vc->vc_par[0]);
1863 return;
1864 case '@':
1865 csi_at(vc, vc->vc_par[0]);
1866 return;
1867 case ']': /* setterm functions */
1868 setterm_command(vc);
1869 return;
1870 }
1871 return;
1872 case ESpercent:
1873 vc->vc_state = ESnormal;
1874 switch (c) {
1875 case '@': /* defined in ISO 2022 */
1876 vc->vc_utf = 0;
1877 return;
1878 case 'G': /* prelim official escape code */
1879 case '8': /* retained for compatibility */
1880 vc->vc_utf = 1;
1881 return;
1882 }
1883 return;
1884 case ESfunckey:
1885 vc->vc_state = ESnormal;
1886 return;
1887 case EShash:
1888 vc->vc_state = ESnormal;
1889 if (c == '8') {
1890 /* DEC screen alignment test. kludge :-) */
1891 vc->vc_video_erase_char =
1892 (vc->vc_video_erase_char & 0xff00) | 'E';
1893 csi_J(vc, 2);
1894 vc->vc_video_erase_char =
1895 (vc->vc_video_erase_char & 0xff00) | ' ';
1896 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
1897 }
1898 return;
1899 case ESsetG0:
1900 if (c == '0')
1901 vc->vc_G0_charset = GRAF_MAP;
1902 else if (c == 'B')
1903 vc->vc_G0_charset = LAT1_MAP;
1904 else if (c == 'U')
1905 vc->vc_G0_charset = IBMPC_MAP;
1906 else if (c == 'K')
1907 vc->vc_G0_charset = USER_MAP;
1908 if (vc->vc_charset == 0)
1909 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1910 vc->vc_state = ESnormal;
1911 return;
1912 case ESsetG1:
1913 if (c == '0')
1914 vc->vc_G1_charset = GRAF_MAP;
1915 else if (c == 'B')
1916 vc->vc_G1_charset = LAT1_MAP;
1917 else if (c == 'U')
1918 vc->vc_G1_charset = IBMPC_MAP;
1919 else if (c == 'K')
1920 vc->vc_G1_charset = USER_MAP;
1921 if (vc->vc_charset == 1)
1922 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1923 vc->vc_state = ESnormal;
1924 return;
1925 default:
1926 vc->vc_state = ESnormal;
1927 }
1928 }
1929
1930 /* This is a temporary buffer used to prepare a tty console write
1931 * so that we can easily avoid touching user space while holding the
1932 * console spinlock. It is allocated in con_init and is shared by
1933 * this code and the vc_screen read/write tty calls.
1934 *
1935 * We have to allocate this statically in the kernel data section
1936 * since console_init (and thus con_init) are called before any
1937 * kernel memory allocation is available.
1938 */
1939 char con_buf[CON_BUF_SIZE];
1940 DECLARE_MUTEX(con_buf_sem);
1941
1942 /* acquires console_sem */
1943 static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count)
1944 {
1945 #ifdef VT_BUF_VRAM_ONLY
1946 #define FLUSH do { } while(0);
1947 #else
1948 #define FLUSH if (draw_x >= 0) { \
1949 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
1950 draw_x = -1; \
1951 }
1952 #endif
1953
1954 int c, tc, ok, n = 0, draw_x = -1;
1955 unsigned int currcons;
1956 unsigned long draw_from = 0, draw_to = 0;
1957 struct vc_data *vc;
1958 u16 himask, charmask;
1959 const unsigned char *orig_buf = NULL;
1960 int orig_count;
1961
1962 if (in_interrupt())
1963 return count;
1964
1965 might_sleep();
1966
1967 acquire_console_sem();
1968 vc = tty->driver_data;
1969 if (vc == NULL) {
1970 printk(KERN_ERR "vt: argh, driver_data is NULL !\n");
1971 release_console_sem();
1972 return 0;
1973 }
1974
1975 currcons = vc->vc_num;
1976 if (!vc_cons_allocated(currcons)) {
1977 /* could this happen? */
1978 static int error = 0;
1979 if (!error) {
1980 error = 1;
1981 printk("con_write: tty %d not allocated\n", currcons+1);
1982 }
1983 release_console_sem();
1984 return 0;
1985 }
1986 release_console_sem();
1987
1988 orig_buf = buf;
1989 orig_count = count;
1990
1991 /* At this point 'buf' is guaranteed to be a kernel buffer
1992 * and therefore no access to userspace (and therefore sleeping)
1993 * will be needed. The con_buf_sem serializes all tty based
1994 * console rendering and vcs write/read operations. We hold
1995 * the console spinlock during the entire write.
1996 */
1997
1998 acquire_console_sem();
1999
2000 vc = tty->driver_data;
2001 if (vc == NULL) {
2002 printk(KERN_ERR "vt: argh, driver_data _became_ NULL !\n");
2003 release_console_sem();
2004 goto out;
2005 }
2006
2007 himask = vc->vc_hi_font_mask;
2008 charmask = himask ? 0x1ff : 0xff;
2009
2010 /* undraw cursor first */
2011 if (IS_FG(vc))
2012 hide_cursor(vc);
2013
2014 while (!tty->stopped && count) {
2015 int orig = *buf;
2016 c = orig;
2017 buf++;
2018 n++;
2019 count--;
2020
2021 /* Do no translation at all in control states */
2022 if (vc->vc_state != ESnormal) {
2023 tc = c;
2024 } else if (vc->vc_utf && !vc->vc_disp_ctrl) {
2025 /* Combine UTF-8 into Unicode */
2026 /* Malformed sequences as sequences of replacement glyphs */
2027 rescan_last_byte:
2028 if(c > 0x7f) {
2029 if (vc->vc_utf_count) {
2030 if ((c & 0xc0) == 0x80) {
2031 vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f);
2032 if (--vc->vc_utf_count) {
2033 vc->vc_npar++;
2034 continue;
2035 }
2036 tc = c = vc->vc_utf_char;
2037 } else
2038 goto replacement_glyph;
2039 } else {
2040 vc->vc_npar = 0;
2041 if ((c & 0xe0) == 0xc0) {
2042 vc->vc_utf_count = 1;
2043 vc->vc_utf_char = (c & 0x1f);
2044 } else if ((c & 0xf0) == 0xe0) {
2045 vc->vc_utf_count = 2;
2046 vc->vc_utf_char = (c & 0x0f);
2047 } else if ((c & 0xf8) == 0xf0) {
2048 vc->vc_utf_count = 3;
2049 vc->vc_utf_char = (c & 0x07);
2050 } else if ((c & 0xfc) == 0xf8) {
2051 vc->vc_utf_count = 4;
2052 vc->vc_utf_char = (c & 0x03);
2053 } else if ((c & 0xfe) == 0xfc) {
2054 vc->vc_utf_count = 5;
2055 vc->vc_utf_char = (c & 0x01);
2056 } else
2057 goto replacement_glyph;
2058 continue;
2059 }
2060 } else {
2061 if (vc->vc_utf_count)
2062 goto replacement_glyph;
2063 tc = c;
2064 }
2065 } else { /* no utf or alternate charset mode */
2066 tc = vc->vc_translate[vc->vc_toggle_meta ? (c | 0x80) : c];
2067 }
2068
2069 /* If the original code was a control character we
2070 * only allow a glyph to be displayed if the code is
2071 * not normally used (such as for cursor movement) or
2072 * if the disp_ctrl mode has been explicitly enabled.
2073 * Certain characters (as given by the CTRL_ALWAYS
2074 * bitmap) are always displayed as control characters,
2075 * as the console would be pretty useless without
2076 * them; to display an arbitrary font position use the
2077 * direct-to-font zone in UTF-8 mode.
2078 */
2079 ok = tc && (c >= 32 ||
2080 !(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 :
2081 vc->vc_utf || ((CTRL_ACTION >> c) & 1)))
2082 && (c != 127 || vc->vc_disp_ctrl)
2083 && (c != 128+27);
2084
2085 if (vc->vc_state == ESnormal && ok) {
2086 /* Now try to find out how to display it */
2087 tc = conv_uni_to_pc(vc, tc);
2088 if (tc & ~charmask) {
2089 if ( tc == -4 ) {
2090 /* If we got -4 (not found) then see if we have
2091 defined a replacement character (U+FFFD) */
2092 replacement_glyph:
2093 tc = conv_uni_to_pc(vc, 0xfffd);
2094 if (!(tc & ~charmask))
2095 goto display_glyph;
2096 } else if ( tc != -3 )
2097 continue; /* nothing to display */
2098 /* no hash table or no replacement --
2099 * hope for the best */
2100 if ( c & ~charmask )
2101 tc = '?';
2102 else
2103 tc = c;
2104 }
2105
2106 display_glyph:
2107 if (vc->vc_need_wrap || vc->vc_decim)
2108 FLUSH
2109 if (vc->vc_need_wrap) {
2110 cr(vc);
2111 lf(vc);
2112 }
2113 if (vc->vc_decim)
2114 insert_char(vc, 1);
2115 scr_writew(himask ?
2116 ((vc->vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) :
2117 (vc->vc_attr << 8) + tc,
2118 (u16 *) vc->vc_pos);
2119 if (DO_UPDATE(vc) && draw_x < 0) {
2120 draw_x = vc->vc_x;
2121 draw_from = vc->vc_pos;
2122 }
2123 if (vc->vc_x == vc->vc_cols - 1) {
2124 vc->vc_need_wrap = vc->vc_decawm;
2125 draw_to = vc->vc_pos + 2;
2126 } else {
2127 vc->vc_x++;
2128 draw_to = (vc->vc_pos += 2);
2129 }
2130 if (vc->vc_utf_count) {
2131 if (vc->vc_npar) {
2132 vc->vc_npar--;
2133 goto display_glyph;
2134 }
2135 vc->vc_utf_count = 0;
2136 c = orig;
2137 goto rescan_last_byte;
2138 }
2139 continue;
2140 }
2141 FLUSH
2142 do_con_trol(tty, vc, orig);
2143 }
2144 FLUSH
2145 console_conditional_schedule();
2146 release_console_sem();
2147
2148 out:
2149 return n;
2150 #undef FLUSH
2151 }
2152
2153 /*
2154 * This is the console switching callback.
2155 *
2156 * Doing console switching in a process context allows
2157 * us to do the switches asynchronously (needed when we want
2158 * to switch due to a keyboard interrupt). Synchronization
2159 * with other console code and prevention of re-entrancy is
2160 * ensured with console_sem.
2161 */
2162 static void console_callback(void *ignored)
2163 {
2164 acquire_console_sem();
2165
2166 if (want_console >= 0) {
2167 if (want_console != fg_console &&
2168 vc_cons_allocated(want_console)) {
2169 hide_cursor(vc_cons[fg_console].d);
2170 change_console(vc_cons[want_console].d);
2171 /* we only changed when the console had already
2172 been allocated - a new console is not created
2173 in an interrupt routine */
2174 }
2175 want_console = -1;
2176 }
2177 if (do_poke_blanked_console) { /* do not unblank for a LED change */
2178 do_poke_blanked_console = 0;
2179 poke_blanked_console();
2180 }
2181 if (scrollback_delta) {
2182 struct vc_data *vc = vc_cons[fg_console].d;
2183 clear_selection();
2184 if (vc->vc_mode == KD_TEXT)
2185 vc->vc_sw->con_scrolldelta(vc, scrollback_delta);
2186 scrollback_delta = 0;
2187 }
2188 if (blank_timer_expired) {
2189 do_blank_screen(0);
2190 blank_timer_expired = 0;
2191 }
2192
2193 release_console_sem();
2194 }
2195
2196 void set_console(int nr)
2197 {
2198 want_console = nr;
2199 schedule_console_callback();
2200 }
2201
2202 struct tty_driver *console_driver;
2203
2204 #ifdef CONFIG_VT_CONSOLE
2205
2206 /*
2207 * Console on virtual terminal
2208 *
2209 * The console must be locked when we get here.
2210 */
2211
2212 static void vt_console_print(struct console *co, const char *b, unsigned count)
2213 {
2214 struct vc_data *vc = vc_cons[fg_console].d;
2215 unsigned char c;
2216 static unsigned long printing;
2217 const ushort *start;
2218 ushort cnt = 0;
2219 ushort myx;
2220
2221 /* console busy or not yet initialized */
2222 if (!printable || test_and_set_bit(0, &printing))
2223 return;
2224
2225 if (kmsg_redirect && vc_cons_allocated(kmsg_redirect - 1))
2226 vc = vc_cons[kmsg_redirect - 1].d;
2227
2228 /* read `x' only after setting currcons properly (otherwise
2229 the `x' macro will read the x of the foreground console). */
2230 myx = vc->vc_x;
2231
2232 if (!vc_cons_allocated(fg_console)) {
2233 /* impossible */
2234 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2235 goto quit;
2236 }
2237
2238 if (vc->vc_mode != KD_TEXT)
2239 goto quit;
2240
2241 /* undraw cursor first */
2242 if (IS_FG(vc))
2243 hide_cursor(vc);
2244
2245 start = (ushort *)vc->vc_pos;
2246
2247 /* Contrived structure to try to emulate original need_wrap behaviour
2248 * Problems caused when we have need_wrap set on '\n' character */
2249 while (count--) {
2250 c = *b++;
2251 if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) {
2252 if (cnt > 0) {
2253 if (CON_IS_VISIBLE(vc))
2254 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2255 vc->vc_x += cnt;
2256 if (vc->vc_need_wrap)
2257 vc->vc_x--;
2258 cnt = 0;
2259 }
2260 if (c == 8) { /* backspace */
2261 bs(vc);
2262 start = (ushort *)vc->vc_pos;
2263 myx = vc->vc_x;
2264 continue;
2265 }
2266 if (c != 13)
2267 lf(vc);
2268 cr(vc);
2269 start = (ushort *)vc->vc_pos;
2270 myx = vc->vc_x;
2271 if (c == 10 || c == 13)
2272 continue;
2273 }
2274 scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos);
2275 cnt++;
2276 if (myx == vc->vc_cols - 1) {
2277 vc->vc_need_wrap = 1;
2278 continue;
2279 }
2280 vc->vc_pos += 2;
2281 myx++;
2282 }
2283 if (cnt > 0) {
2284 if (CON_IS_VISIBLE(vc))
2285 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2286 vc->vc_x += cnt;
2287 if (vc->vc_x == vc->vc_cols) {
2288 vc->vc_x--;
2289 vc->vc_need_wrap = 1;
2290 }
2291 }
2292 set_cursor(vc);
2293
2294 quit:
2295 clear_bit(0, &printing);
2296 }
2297
2298 static struct tty_driver *vt_console_device(struct console *c, int *index)
2299 {
2300 *index = c->index ? c->index-1 : fg_console;
2301 return console_driver;
2302 }
2303
2304 static struct console vt_console_driver = {
2305 .name = "tty",
2306 .write = vt_console_print,
2307 .device = vt_console_device,
2308 .unblank = unblank_screen,
2309 .flags = CON_PRINTBUFFER,
2310 .index = -1,
2311 };
2312 #endif
2313
2314 /*
2315 * Handling of Linux-specific VC ioctls
2316 */
2317
2318 /*
2319 * Generally a bit racy with respect to console_sem().
2320 *
2321 * There are some functions which don't need it.
2322 *
2323 * There are some functions which can sleep for arbitrary periods
2324 * (paste_selection) but we don't need the lock there anyway.
2325 *
2326 * set_selection has locking, and definitely needs it
2327 */
2328
2329 int tioclinux(struct tty_struct *tty, unsigned long arg)
2330 {
2331 char type, data;
2332 char __user *p = (char __user *)arg;
2333 int lines;
2334 int ret;
2335
2336 if (tty->driver->type != TTY_DRIVER_TYPE_CONSOLE)
2337 return -EINVAL;
2338 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN))
2339 return -EPERM;
2340 if (get_user(type, p))
2341 return -EFAULT;
2342 ret = 0;
2343 switch (type)
2344 {
2345 case TIOCL_SETSEL:
2346 acquire_console_sem();
2347 ret = set_selection((struct tiocl_selection __user *)(p+1), tty);
2348 release_console_sem();
2349 break;
2350 case TIOCL_PASTESEL:
2351 ret = paste_selection(tty);
2352 break;
2353 case TIOCL_UNBLANKSCREEN:
2354 acquire_console_sem();
2355 unblank_screen();
2356 release_console_sem();
2357 break;
2358 case TIOCL_SELLOADLUT:
2359 ret = sel_loadlut(p);
2360 break;
2361 case TIOCL_GETSHIFTSTATE:
2362
2363 /*
2364 * Make it possible to react to Shift+Mousebutton.
2365 * Note that 'shift_state' is an undocumented
2366 * kernel-internal variable; programs not closely
2367 * related to the kernel should not use this.
2368 */
2369 data = shift_state;
2370 ret = __put_user(data, p);
2371 break;
2372 case TIOCL_GETMOUSEREPORTING:
2373 data = mouse_reporting();
2374 ret = __put_user(data, p);
2375 break;
2376 case TIOCL_SETVESABLANK:
2377 set_vesa_blanking(p);
2378 break;
2379 case TIOCL_GETKMSGREDIRECT:
2380 data = kmsg_redirect;
2381 ret = __put_user(data, p);
2382 break;
2383 case TIOCL_SETKMSGREDIRECT:
2384 if (!capable(CAP_SYS_ADMIN)) {
2385 ret = -EPERM;
2386 } else {
2387 if (get_user(data, p+1))
2388 ret = -EFAULT;
2389 else
2390 kmsg_redirect = data;
2391 }
2392 break;
2393 case TIOCL_GETFGCONSOLE:
2394 ret = fg_console;
2395 break;
2396 case TIOCL_SCROLLCONSOLE:
2397 if (get_user(lines, (s32 __user *)(p+4))) {
2398 ret = -EFAULT;
2399 } else {
2400 scrollfront(vc_cons[fg_console].d, lines);
2401 ret = 0;
2402 }
2403 break;
2404 case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
2405 acquire_console_sem();
2406 ignore_poke = 1;
2407 do_blank_screen(0);
2408 release_console_sem();
2409 break;
2410 case TIOCL_BLANKEDSCREEN:
2411 ret = console_blanked;
2412 break;
2413 default:
2414 ret = -EINVAL;
2415 break;
2416 }
2417 return ret;
2418 }
2419
2420 /*
2421 * /dev/ttyN handling
2422 */
2423
2424 static int con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2425 {
2426 int retval;
2427
2428 retval = do_con_write(tty, buf, count);
2429 con_flush_chars(tty);
2430
2431 return retval;
2432 }
2433
2434 static void con_put_char(struct tty_struct *tty, unsigned char ch)
2435 {
2436 if (in_interrupt())
2437 return; /* n_r3964 calls put_char() from interrupt context */
2438 do_con_write(tty, &ch, 1);
2439 }
2440
2441 static int con_write_room(struct tty_struct *tty)
2442 {
2443 if (tty->stopped)
2444 return 0;
2445 return 4096; /* No limit, really; we're not buffering */
2446 }
2447
2448 static int con_chars_in_buffer(struct tty_struct *tty)
2449 {
2450 return 0; /* we're not buffering */
2451 }
2452
2453 /*
2454 * con_throttle and con_unthrottle are only used for
2455 * paste_selection(), which has to stuff in a large number of
2456 * characters...
2457 */
2458 static void con_throttle(struct tty_struct *tty)
2459 {
2460 }
2461
2462 static void con_unthrottle(struct tty_struct *tty)
2463 {
2464 struct vc_data *vc = tty->driver_data;
2465
2466 wake_up_interruptible(&vc->paste_wait);
2467 }
2468
2469 /*
2470 * Turn the Scroll-Lock LED on when the tty is stopped
2471 */
2472 static void con_stop(struct tty_struct *tty)
2473 {
2474 int console_num;
2475 if (!tty)
2476 return;
2477 console_num = tty->index;
2478 if (!vc_cons_allocated(console_num))
2479 return;
2480 set_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2481 set_leds();
2482 }
2483
2484 /*
2485 * Turn the Scroll-Lock LED off when the console is started
2486 */
2487 static void con_start(struct tty_struct *tty)
2488 {
2489 int console_num;
2490 if (!tty)
2491 return;
2492 console_num = tty->index;
2493 if (!vc_cons_allocated(console_num))
2494 return;
2495 clr_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2496 set_leds();
2497 }
2498
2499 static void con_flush_chars(struct tty_struct *tty)
2500 {
2501 struct vc_data *vc;
2502
2503 if (in_interrupt()) /* from flush_to_ldisc */
2504 return;
2505
2506 /* if we race with con_close(), vt may be null */
2507 acquire_console_sem();
2508 vc = tty->driver_data;
2509 if (vc)
2510 set_cursor(vc);
2511 release_console_sem();
2512 }
2513
2514 /*
2515 * Allocate the console screen memory.
2516 */
2517 static int con_open(struct tty_struct *tty, struct file *filp)
2518 {
2519 unsigned int currcons = tty->index;
2520 int ret = 0;
2521
2522 acquire_console_sem();
2523 if (tty->driver_data == NULL) {
2524 ret = vc_allocate(currcons);
2525 if (ret == 0) {
2526 struct vc_data *vc = vc_cons[currcons].d;
2527 tty->driver_data = vc;
2528 vc->vc_tty = tty;
2529
2530 if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
2531 tty->winsize.ws_row = vc_cons[currcons].d->vc_rows;
2532 tty->winsize.ws_col = vc_cons[currcons].d->vc_cols;
2533 }
2534 release_console_sem();
2535 vcs_make_sysfs(tty);
2536 return ret;
2537 }
2538 }
2539 release_console_sem();
2540 return ret;
2541 }
2542
2543 /*
2544 * We take tty_mutex in here to prevent another thread from coming in via init_dev
2545 * and taking a ref against the tty while we're in the process of forgetting
2546 * about it and cleaning things up.
2547 *
2548 * This is because vcs_remove_sysfs() can sleep and will drop the BKL.
2549 */
2550 static void con_close(struct tty_struct *tty, struct file *filp)
2551 {
2552 mutex_lock(&tty_mutex);
2553 acquire_console_sem();
2554 if (tty && tty->count == 1) {
2555 struct vc_data *vc = tty->driver_data;
2556
2557 if (vc)
2558 vc->vc_tty = NULL;
2559 tty->driver_data = NULL;
2560 release_console_sem();
2561 vcs_remove_sysfs(tty);
2562 mutex_unlock(&tty_mutex);
2563 /*
2564 * tty_mutex is released, but we still hold BKL, so there is
2565 * still exclusion against init_dev()
2566 */
2567 return;
2568 }
2569 release_console_sem();
2570 mutex_unlock(&tty_mutex);
2571 }
2572
2573 static void vc_init(struct vc_data *vc, unsigned int rows,
2574 unsigned int cols, int do_clear)
2575 {
2576 int j, k ;
2577
2578 vc->vc_cols = cols;
2579 vc->vc_rows = rows;
2580 vc->vc_size_row = cols << 1;
2581 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
2582
2583 set_origin(vc);
2584 vc->vc_pos = vc->vc_origin;
2585 reset_vc(vc);
2586 for (j=k=0; j<16; j++) {
2587 vc->vc_palette[k++] = default_red[j] ;
2588 vc->vc_palette[k++] = default_grn[j] ;
2589 vc->vc_palette[k++] = default_blu[j] ;
2590 }
2591 vc->vc_def_color = 0x07; /* white */
2592 vc->vc_ulcolor = 0x0f; /* bold white */
2593 vc->vc_halfcolor = 0x08; /* grey */
2594 init_waitqueue_head(&vc->paste_wait);
2595 reset_terminal(vc, do_clear);
2596 }
2597
2598 /*
2599 * This routine initializes console interrupts, and does nothing
2600 * else. If you want the screen to clear, call tty_write with
2601 * the appropriate escape-sequence.
2602 */
2603
2604 static int __init con_init(void)
2605 {
2606 const char *display_desc = NULL;
2607 struct vc_data *vc;
2608 unsigned int currcons = 0, i;
2609
2610 acquire_console_sem();
2611
2612 if (conswitchp)
2613 display_desc = conswitchp->con_startup();
2614 if (!display_desc) {
2615 fg_console = 0;
2616 release_console_sem();
2617 return 0;
2618 }
2619
2620 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2621 struct con_driver *con_driver = &registered_con_driver[i];
2622
2623 if (con_driver->con == NULL) {
2624 con_driver->con = conswitchp;
2625 con_driver->desc = display_desc;
2626 con_driver->flag = CON_DRIVER_FLAG_INIT;
2627 con_driver->first = 0;
2628 con_driver->last = MAX_NR_CONSOLES - 1;
2629 break;
2630 }
2631 }
2632
2633 for (i = 0; i < MAX_NR_CONSOLES; i++)
2634 con_driver_map[i] = conswitchp;
2635
2636 init_timer(&console_timer);
2637 console_timer.function = blank_screen_t;
2638 if (blankinterval) {
2639 blank_state = blank_normal_wait;
2640 mod_timer(&console_timer, jiffies + blankinterval);
2641 }
2642
2643 /*
2644 * kmalloc is not running yet - we use the bootmem allocator.
2645 */
2646 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) {
2647 vc_cons[currcons].d = vc = alloc_bootmem(sizeof(struct vc_data));
2648 visual_init(vc, currcons, 1);
2649 vc->vc_screenbuf = (unsigned short *)alloc_bootmem(vc->vc_screenbuf_size);
2650 vc->vc_kmalloced = 0;
2651 vc_init(vc, vc->vc_rows, vc->vc_cols,
2652 currcons || !vc->vc_sw->con_save_screen);
2653 }
2654 currcons = fg_console = 0;
2655 master_display_fg = vc = vc_cons[currcons].d;
2656 set_origin(vc);
2657 save_screen(vc);
2658 gotoxy(vc, vc->vc_x, vc->vc_y);
2659 csi_J(vc, 0);
2660 update_screen(vc);
2661 printk("Console: %s %s %dx%d",
2662 vc->vc_can_do_color ? "colour" : "mono",
2663 display_desc, vc->vc_cols, vc->vc_rows);
2664 printable = 1;
2665 printk("\n");
2666
2667 release_console_sem();
2668
2669 #ifdef CONFIG_VT_CONSOLE
2670 register_console(&vt_console_driver);
2671 #endif
2672 return 0;
2673 }
2674 console_initcall(con_init);
2675
2676 static struct tty_operations con_ops = {
2677 .open = con_open,
2678 .close = con_close,
2679 .write = con_write,
2680 .write_room = con_write_room,
2681 .put_char = con_put_char,
2682 .flush_chars = con_flush_chars,
2683 .chars_in_buffer = con_chars_in_buffer,
2684 .ioctl = vt_ioctl,
2685 .stop = con_stop,
2686 .start = con_start,
2687 .throttle = con_throttle,
2688 .unthrottle = con_unthrottle,
2689 };
2690
2691 int __init vty_init(void)
2692 {
2693 vcs_init();
2694
2695 console_driver = alloc_tty_driver(MAX_NR_CONSOLES);
2696 if (!console_driver)
2697 panic("Couldn't allocate console driver\n");
2698 console_driver->owner = THIS_MODULE;
2699 console_driver->name = "tty";
2700 console_driver->name_base = 1;
2701 console_driver->major = TTY_MAJOR;
2702 console_driver->minor_start = 1;
2703 console_driver->type = TTY_DRIVER_TYPE_CONSOLE;
2704 console_driver->init_termios = tty_std_termios;
2705 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS;
2706 tty_set_operations(console_driver, &con_ops);
2707 if (tty_register_driver(console_driver))
2708 panic("Couldn't register console driver\n");
2709
2710 kbd_init();
2711 console_map_init();
2712 #ifdef CONFIG_PROM_CONSOLE
2713 prom_con_init();
2714 #endif
2715 #ifdef CONFIG_MDA_CONSOLE
2716 mda_console_init();
2717 #endif
2718 return 0;
2719 }
2720
2721 #ifndef VT_SINGLE_DRIVER
2722 #include <linux/device.h>
2723
2724 static struct class *vtconsole_class;
2725
2726 static int bind_con_driver(const struct consw *csw, int first, int last,
2727 int deflt)
2728 {
2729 struct module *owner = csw->owner;
2730 const char *desc = NULL;
2731 struct con_driver *con_driver;
2732 int i, j = -1, k = -1, retval = -ENODEV;
2733
2734 if (!try_module_get(owner))
2735 return -ENODEV;
2736
2737 acquire_console_sem();
2738
2739 /* check if driver is registered */
2740 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2741 con_driver = &registered_con_driver[i];
2742
2743 if (con_driver->con == csw) {
2744 desc = con_driver->desc;
2745 retval = 0;
2746 break;
2747 }
2748 }
2749
2750 if (retval)
2751 goto err;
2752
2753 if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) {
2754 csw->con_startup();
2755 con_driver->flag |= CON_DRIVER_FLAG_INIT;
2756 }
2757
2758 if (deflt) {
2759 if (conswitchp)
2760 module_put(conswitchp->owner);
2761
2762 __module_get(owner);
2763 conswitchp = csw;
2764 }
2765
2766 first = max(first, con_driver->first);
2767 last = min(last, con_driver->last);
2768
2769 for (i = first; i <= last; i++) {
2770 int old_was_color;
2771 struct vc_data *vc = vc_cons[i].d;
2772
2773 if (con_driver_map[i])
2774 module_put(con_driver_map[i]->owner);
2775 __module_get(owner);
2776 con_driver_map[i] = csw;
2777
2778 if (!vc || !vc->vc_sw)
2779 continue;
2780
2781 j = i;
2782
2783 if (CON_IS_VISIBLE(vc)) {
2784 k = i;
2785 save_screen(vc);
2786 }
2787
2788 old_was_color = vc->vc_can_do_color;
2789 vc->vc_sw->con_deinit(vc);
2790 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
2791 visual_init(vc, i, 0);
2792 set_origin(vc);
2793 update_attr(vc);
2794
2795 /* If the console changed between mono <-> color, then
2796 * the attributes in the screenbuf will be wrong. The
2797 * following resets all attributes to something sane.
2798 */
2799 if (old_was_color != vc->vc_can_do_color)
2800 clear_buffer_attributes(vc);
2801 }
2802
2803 printk("Console: switching ");
2804 if (!deflt)
2805 printk("consoles %d-%d ", first+1, last+1);
2806 if (j >= 0) {
2807 struct vc_data *vc = vc_cons[j].d;
2808
2809 printk("to %s %s %dx%d\n",
2810 vc->vc_can_do_color ? "colour" : "mono",
2811 desc, vc->vc_cols, vc->vc_rows);
2812
2813 if (k >= 0) {
2814 vc = vc_cons[k].d;
2815 update_screen(vc);
2816 }
2817 } else
2818 printk("to %s\n", desc);
2819
2820 retval = 0;
2821 err:
2822 release_console_sem();
2823 module_put(owner);
2824 return retval;
2825 };
2826
2827 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
2828 static int con_is_graphics(const struct consw *csw, int first, int last)
2829 {
2830 int i, retval = 0;
2831
2832 for (i = first; i <= last; i++) {
2833 struct vc_data *vc = vc_cons[i].d;
2834
2835 if (vc && vc->vc_mode == KD_GRAPHICS) {
2836 retval = 1;
2837 break;
2838 }
2839 }
2840
2841 return retval;
2842 }
2843
2844 static int unbind_con_driver(const struct consw *csw, int first, int last,
2845 int deflt)
2846 {
2847 struct module *owner = csw->owner;
2848 const struct consw *defcsw = NULL;
2849 struct con_driver *con_driver = NULL, *con_back = NULL;
2850 int i, retval = -ENODEV;
2851
2852 if (!try_module_get(owner))
2853 return -ENODEV;
2854
2855 acquire_console_sem();
2856
2857 /* check if driver is registered and if it is unbindable */
2858 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2859 con_driver = &registered_con_driver[i];
2860
2861 if (con_driver->con == csw &&
2862 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
2863 retval = 0;
2864 break;
2865 }
2866 }
2867
2868 if (retval) {
2869 release_console_sem();
2870 goto err;
2871 }
2872
2873 retval = -ENODEV;
2874
2875 /* check if backup driver exists */
2876 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2877 con_back = &registered_con_driver[i];
2878
2879 if (con_back->con &&
2880 !(con_back->flag & CON_DRIVER_FLAG_MODULE)) {
2881 defcsw = con_back->con;
2882 retval = 0;
2883 break;
2884 }
2885 }
2886
2887 if (retval) {
2888 release_console_sem();
2889 goto err;
2890 }
2891
2892 if (!con_is_bound(csw)) {
2893 release_console_sem();
2894 goto err;
2895 }
2896
2897 first = max(first, con_driver->first);
2898 last = min(last, con_driver->last);
2899
2900 for (i = first; i <= last; i++) {
2901 if (con_driver_map[i] == csw) {
2902 module_put(csw->owner);
2903 con_driver_map[i] = NULL;
2904 }
2905 }
2906
2907 if (!con_is_bound(defcsw)) {
2908 const struct consw *defconsw = conswitchp;
2909
2910 defcsw->con_startup();
2911 con_back->flag |= CON_DRIVER_FLAG_INIT;
2912 /*
2913 * vgacon may change the default driver to point
2914 * to dummycon, we restore it here...
2915 */
2916 conswitchp = defconsw;
2917 }
2918
2919 if (!con_is_bound(csw))
2920 con_driver->flag &= ~CON_DRIVER_FLAG_INIT;
2921
2922 release_console_sem();
2923 /* ignore return value, binding should not fail */
2924 bind_con_driver(defcsw, first, last, deflt);
2925 err:
2926 module_put(owner);
2927 return retval;
2928
2929 }
2930
2931 static int vt_bind(struct con_driver *con)
2932 {
2933 const struct consw *defcsw = NULL, *csw = NULL;
2934 int i, more = 1, first = -1, last = -1, deflt = 0;
2935
2936 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
2937 con_is_graphics(con->con, con->first, con->last))
2938 goto err;
2939
2940 csw = con->con;
2941
2942 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2943 struct con_driver *con = &registered_con_driver[i];
2944
2945 if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) {
2946 defcsw = con->con;
2947 break;
2948 }
2949 }
2950
2951 if (!defcsw)
2952 goto err;
2953
2954 while (more) {
2955 more = 0;
2956
2957 for (i = con->first; i <= con->last; i++) {
2958 if (con_driver_map[i] == defcsw) {
2959 if (first == -1)
2960 first = i;
2961 last = i;
2962 more = 1;
2963 } else if (first != -1)
2964 break;
2965 }
2966
2967 if (first == 0 && last == MAX_NR_CONSOLES -1)
2968 deflt = 1;
2969
2970 if (first != -1)
2971 bind_con_driver(csw, first, last, deflt);
2972
2973 first = -1;
2974 last = -1;
2975 deflt = 0;
2976 }
2977
2978 err:
2979 return 0;
2980 }
2981
2982 static int vt_unbind(struct con_driver *con)
2983 {
2984 const struct consw *csw = NULL;
2985 int i, more = 1, first = -1, last = -1, deflt = 0;
2986
2987 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
2988 con_is_graphics(con->con, con->first, con->last))
2989 goto err;
2990
2991 csw = con->con;
2992
2993 while (more) {
2994 more = 0;
2995
2996 for (i = con->first; i <= con->last; i++) {
2997 if (con_driver_map[i] == csw) {
2998 if (first == -1)
2999 first = i;
3000 last = i;
3001 more = 1;
3002 } else if (first != -1)
3003 break;
3004 }
3005
3006 if (first == 0 && last == MAX_NR_CONSOLES -1)
3007 deflt = 1;
3008
3009 if (first != -1)
3010 unbind_con_driver(csw, first, last, deflt);
3011
3012 first = -1;
3013 last = -1;
3014 deflt = 0;
3015 }
3016
3017 err:
3018 return 0;
3019 }
3020 #else
3021 static inline int vt_bind(struct con_driver *con)
3022 {
3023 return 0;
3024 }
3025 static inline int vt_unbind(struct con_driver *con)
3026 {
3027 return 0;
3028 }
3029 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3030
3031 static ssize_t store_bind(struct class_device *class_device,
3032 const char *buf, size_t count)
3033 {
3034 struct con_driver *con = class_get_devdata(class_device);
3035 int bind = simple_strtoul(buf, NULL, 0);
3036
3037 if (bind)
3038 vt_bind(con);
3039 else
3040 vt_unbind(con);
3041
3042 return count;
3043 }
3044
3045 static ssize_t show_bind(struct class_device *class_device, char *buf)
3046 {
3047 struct con_driver *con = class_get_devdata(class_device);
3048 int bind = con_is_bound(con->con);
3049
3050 return snprintf(buf, PAGE_SIZE, "%i\n", bind);
3051 }
3052
3053 static ssize_t show_name(struct class_device *class_device, char *buf)
3054 {
3055 struct con_driver *con = class_get_devdata(class_device);
3056
3057 return snprintf(buf, PAGE_SIZE, "%s %s\n",
3058 (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)",
3059 con->desc);
3060
3061 }
3062
3063 static struct class_device_attribute class_device_attrs[] = {
3064 __ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind),
3065 __ATTR(name, S_IRUGO, show_name, NULL),
3066 };
3067
3068 static int vtconsole_init_class_device(struct con_driver *con)
3069 {
3070 int i;
3071
3072 class_set_devdata(con->class_dev, con);
3073 for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++)
3074 class_device_create_file(con->class_dev,
3075 &class_device_attrs[i]);
3076
3077 return 0;
3078 }
3079
3080 static void vtconsole_deinit_class_device(struct con_driver *con)
3081 {
3082 int i;
3083
3084 for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++)
3085 class_device_remove_file(con->class_dev,
3086 &class_device_attrs[i]);
3087 }
3088
3089 /**
3090 * con_is_bound - checks if driver is bound to the console
3091 * @csw: console driver
3092 *
3093 * RETURNS: zero if unbound, nonzero if bound
3094 *
3095 * Drivers can call this and if zero, they should release
3096 * all resources allocated on con_startup()
3097 */
3098 int con_is_bound(const struct consw *csw)
3099 {
3100 int i, bound = 0;
3101
3102 for (i = 0; i < MAX_NR_CONSOLES; i++) {
3103 if (con_driver_map[i] == csw) {
3104 bound = 1;
3105 break;
3106 }
3107 }
3108
3109 return bound;
3110 }
3111 EXPORT_SYMBOL(con_is_bound);
3112
3113 /**
3114 * register_con_driver - register console driver to console layer
3115 * @csw: console driver
3116 * @first: the first console to take over, minimum value is 0
3117 * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1
3118 *
3119 * DESCRIPTION: This function registers a console driver which can later
3120 * bind to a range of consoles specified by @first and @last. It will
3121 * also initialize the console driver by calling con_startup().
3122 */
3123 int register_con_driver(const struct consw *csw, int first, int last)
3124 {
3125 struct module *owner = csw->owner;
3126 struct con_driver *con_driver;
3127 const char *desc;
3128 int i, retval = 0;
3129
3130 if (!try_module_get(owner))
3131 return -ENODEV;
3132
3133 acquire_console_sem();
3134
3135 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3136 con_driver = &registered_con_driver[i];
3137
3138 /* already registered */
3139 if (con_driver->con == csw)
3140 retval = -EINVAL;
3141 }
3142
3143 if (retval)
3144 goto err;
3145
3146 desc = csw->con_startup();
3147
3148 if (!desc)
3149 goto err;
3150
3151 retval = -EINVAL;
3152
3153 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3154 con_driver = &registered_con_driver[i];
3155
3156 if (con_driver->con == NULL) {
3157 con_driver->con = csw;
3158 con_driver->desc = desc;
3159 con_driver->node = i;
3160 con_driver->flag = CON_DRIVER_FLAG_MODULE |
3161 CON_DRIVER_FLAG_INIT;
3162 con_driver->first = first;
3163 con_driver->last = last;
3164 retval = 0;
3165 break;
3166 }
3167 }
3168
3169 if (retval)
3170 goto err;
3171
3172 con_driver->class_dev = class_device_create(vtconsole_class, NULL,
3173 MKDEV(0, con_driver->node),
3174 NULL, "vtcon%i",
3175 con_driver->node);
3176
3177 if (IS_ERR(con_driver->class_dev)) {
3178 printk(KERN_WARNING "Unable to create class_device for %s; "
3179 "errno = %ld\n", con_driver->desc,
3180 PTR_ERR(con_driver->class_dev));
3181 con_driver->class_dev = NULL;
3182 } else {
3183 vtconsole_init_class_device(con_driver);
3184 }
3185 err:
3186 release_console_sem();
3187 module_put(owner);
3188 return retval;
3189 }
3190 EXPORT_SYMBOL(register_con_driver);
3191
3192 /**
3193 * unregister_con_driver - unregister console driver from console layer
3194 * @csw: console driver
3195 *
3196 * DESCRIPTION: All drivers that registers to the console layer must
3197 * call this function upon exit, or if the console driver is in a state
3198 * where it won't be able to handle console services, such as the
3199 * framebuffer console without loaded framebuffer drivers.
3200 *
3201 * The driver must unbind first prior to unregistration.
3202 */
3203 int unregister_con_driver(const struct consw *csw)
3204 {
3205 int i, retval = -ENODEV;
3206
3207 acquire_console_sem();
3208
3209 /* cannot unregister a bound driver */
3210 if (con_is_bound(csw))
3211 goto err;
3212
3213 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3214 struct con_driver *con_driver = &registered_con_driver[i];
3215
3216 if (con_driver->con == csw &&
3217 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3218 vtconsole_deinit_class_device(con_driver);
3219 class_device_destroy(vtconsole_class,
3220 MKDEV(0, con_driver->node));
3221 con_driver->con = NULL;
3222 con_driver->desc = NULL;
3223 con_driver->class_dev = NULL;
3224 con_driver->node = 0;
3225 con_driver->flag = 0;
3226 con_driver->first = 0;
3227 con_driver->last = 0;
3228 retval = 0;
3229 break;
3230 }
3231 }
3232 err:
3233 release_console_sem();
3234 return retval;
3235 }
3236 EXPORT_SYMBOL(unregister_con_driver);
3237
3238 /*
3239 * If we support more console drivers, this function is used
3240 * when a driver wants to take over some existing consoles
3241 * and become default driver for newly opened ones.
3242 *
3243 * take_over_console is basically a register followed by unbind
3244 */
3245 int take_over_console(const struct consw *csw, int first, int last, int deflt)
3246 {
3247 int err;
3248
3249 err = register_con_driver(csw, first, last);
3250
3251 if (!err)
3252 bind_con_driver(csw, first, last, deflt);
3253
3254 return err;
3255 }
3256
3257 /*
3258 * give_up_console is a wrapper to unregister_con_driver. It will only
3259 * work if driver is fully unbound.
3260 */
3261 void give_up_console(const struct consw *csw)
3262 {
3263 unregister_con_driver(csw);
3264 }
3265
3266 static int __init vtconsole_class_init(void)
3267 {
3268 int i;
3269
3270 vtconsole_class = class_create(THIS_MODULE, "vtconsole");
3271 if (IS_ERR(vtconsole_class)) {
3272 printk(KERN_WARNING "Unable to create vt console class; "
3273 "errno = %ld\n", PTR_ERR(vtconsole_class));
3274 vtconsole_class = NULL;
3275 }
3276
3277 /* Add system drivers to sysfs */
3278 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3279 struct con_driver *con = &registered_con_driver[i];
3280
3281 if (con->con && !con->class_dev) {
3282 con->class_dev =
3283 class_device_create(vtconsole_class, NULL,
3284 MKDEV(0, con->node), NULL,
3285 "vtcon%i", con->node);
3286
3287 if (IS_ERR(con->class_dev)) {
3288 printk(KERN_WARNING "Unable to create "
3289 "class_device for %s; errno = %ld\n",
3290 con->desc, PTR_ERR(con->class_dev));
3291 con->class_dev = NULL;
3292 } else {
3293 vtconsole_init_class_device(con);
3294 }
3295 }
3296 }
3297
3298 return 0;
3299 }
3300 postcore_initcall(vtconsole_class_init);
3301
3302 #endif
3303
3304 /*
3305 * Screen blanking
3306 */
3307
3308 static void set_vesa_blanking(char __user *p)
3309 {
3310 unsigned int mode;
3311 get_user(mode, p + 1);
3312 vesa_blank_mode = (mode < 4) ? mode : 0;
3313 }
3314
3315 void do_blank_screen(int entering_gfx)
3316 {
3317 struct vc_data *vc = vc_cons[fg_console].d;
3318 int i;
3319
3320 WARN_CONSOLE_UNLOCKED();
3321
3322 if (console_blanked) {
3323 if (blank_state == blank_vesa_wait) {
3324 blank_state = blank_off;
3325 vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0);
3326 }
3327 return;
3328 }
3329 if (blank_state != blank_normal_wait)
3330 return;
3331 blank_state = blank_off;
3332
3333 /* entering graphics mode? */
3334 if (entering_gfx) {
3335 hide_cursor(vc);
3336 save_screen(vc);
3337 vc->vc_sw->con_blank(vc, -1, 1);
3338 console_blanked = fg_console + 1;
3339 set_origin(vc);
3340 return;
3341 }
3342
3343 /* don't blank graphics */
3344 if (vc->vc_mode != KD_TEXT) {
3345 console_blanked = fg_console + 1;
3346 return;
3347 }
3348
3349 hide_cursor(vc);
3350 del_timer_sync(&console_timer);
3351 blank_timer_expired = 0;
3352
3353 save_screen(vc);
3354 /* In case we need to reset origin, blanking hook returns 1 */
3355 i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0);
3356 console_blanked = fg_console + 1;
3357 if (i)
3358 set_origin(vc);
3359
3360 if (console_blank_hook && console_blank_hook(1))
3361 return;
3362
3363 if (vesa_off_interval && vesa_blank_mode) {
3364 blank_state = blank_vesa_wait;
3365 mod_timer(&console_timer, jiffies + vesa_off_interval);
3366 }
3367 }
3368 EXPORT_SYMBOL(do_blank_screen);
3369
3370 /*
3371 * Called by timer as well as from vt_console_driver
3372 */
3373 void do_unblank_screen(int leaving_gfx)
3374 {
3375 struct vc_data *vc;
3376
3377 /* This should now always be called from a "sane" (read: can schedule)
3378 * context for the sake of the low level drivers, except in the special
3379 * case of oops_in_progress
3380 */
3381 if (!oops_in_progress)
3382 might_sleep();
3383
3384 WARN_CONSOLE_UNLOCKED();
3385
3386 ignore_poke = 0;
3387 if (!console_blanked)
3388 return;
3389 if (!vc_cons_allocated(fg_console)) {
3390 /* impossible */
3391 printk("unblank_screen: tty %d not allocated ??\n", fg_console+1);
3392 return;
3393 }
3394 vc = vc_cons[fg_console].d;
3395 if (vc->vc_mode != KD_TEXT)
3396 return; /* but leave console_blanked != 0 */
3397
3398 if (blankinterval) {
3399 mod_timer(&console_timer, jiffies + blankinterval);
3400 blank_state = blank_normal_wait;
3401 }
3402
3403 console_blanked = 0;
3404 if (vc->vc_sw->con_blank(vc, 0, leaving_gfx))
3405 /* Low-level driver cannot restore -> do it ourselves */
3406 update_screen(vc);
3407 if (console_blank_hook)
3408 console_blank_hook(0);
3409 set_palette(vc);
3410 set_cursor(vc);
3411 }
3412 EXPORT_SYMBOL(do_unblank_screen);
3413
3414 /*
3415 * This is called by the outside world to cause a forced unblank, mostly for
3416 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
3417 * call it with 1 as an argument and so force a mode restore... that may kill
3418 * X or at least garbage the screen but would also make the Oops visible...
3419 */
3420 void unblank_screen(void)
3421 {
3422 do_unblank_screen(0);
3423 }
3424
3425 /*
3426 * We defer the timer blanking to work queue so it can take the console mutex
3427 * (console operations can still happen at irq time, but only from printk which
3428 * has the console mutex. Not perfect yet, but better than no locking
3429 */
3430 static void blank_screen_t(unsigned long dummy)
3431 {
3432 if (unlikely(!keventd_up())) {
3433 mod_timer(&console_timer, jiffies + blankinterval);
3434 return;
3435 }
3436 blank_timer_expired = 1;
3437 schedule_work(&console_work);
3438 }
3439
3440 void poke_blanked_console(void)
3441 {
3442 WARN_CONSOLE_UNLOCKED();
3443
3444 /* Add this so we quickly catch whoever might call us in a non
3445 * safe context. Nowadays, unblank_screen() isn't to be called in
3446 * atomic contexts and is allowed to schedule (with the special case
3447 * of oops_in_progress, but that isn't of any concern for this
3448 * function. --BenH.
3449 */
3450 might_sleep();
3451
3452 /* This isn't perfectly race free, but a race here would be mostly harmless,
3453 * at worse, we'll do a spurrious blank and it's unlikely
3454 */
3455 del_timer(&console_timer);
3456 blank_timer_expired = 0;
3457
3458 if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS)
3459 return;
3460 if (console_blanked)
3461 unblank_screen();
3462 else if (blankinterval) {
3463 mod_timer(&console_timer, jiffies + blankinterval);
3464 blank_state = blank_normal_wait;
3465 }
3466 }
3467
3468 /*
3469 * Palettes
3470 */
3471
3472 static void set_palette(struct vc_data *vc)
3473 {
3474 WARN_CONSOLE_UNLOCKED();
3475
3476 if (vc->vc_mode != KD_GRAPHICS)
3477 vc->vc_sw->con_set_palette(vc, color_table);
3478 }
3479
3480 static int set_get_cmap(unsigned char __user *arg, int set)
3481 {
3482 int i, j, k;
3483
3484 WARN_CONSOLE_UNLOCKED();
3485
3486 for (i = 0; i < 16; i++)
3487 if (set) {
3488 get_user(default_red[i], arg++);
3489 get_user(default_grn[i], arg++);
3490 get_user(default_blu[i], arg++);
3491 } else {
3492 put_user(default_red[i], arg++);
3493 put_user(default_grn[i], arg++);
3494 put_user(default_blu[i], arg++);
3495 }
3496 if (set) {
3497 for (i = 0; i < MAX_NR_CONSOLES; i++)
3498 if (vc_cons_allocated(i)) {
3499 for (j = k = 0; j < 16; j++) {
3500 vc_cons[i].d->vc_palette[k++] = default_red[j];
3501 vc_cons[i].d->vc_palette[k++] = default_grn[j];
3502 vc_cons[i].d->vc_palette[k++] = default_blu[j];
3503 }
3504 set_palette(vc_cons[i].d);
3505 }
3506 }
3507 return 0;
3508 }
3509
3510 /*
3511 * Load palette into the DAC registers. arg points to a colour
3512 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
3513 */
3514
3515 int con_set_cmap(unsigned char __user *arg)
3516 {
3517 int rc;
3518
3519 acquire_console_sem();
3520 rc = set_get_cmap (arg,1);
3521 release_console_sem();
3522
3523 return rc;
3524 }
3525
3526 int con_get_cmap(unsigned char __user *arg)
3527 {
3528 int rc;
3529
3530 acquire_console_sem();
3531 rc = set_get_cmap (arg,0);
3532 release_console_sem();
3533
3534 return rc;
3535 }
3536
3537 void reset_palette(struct vc_data *vc)
3538 {
3539 int j, k;
3540 for (j=k=0; j<16; j++) {
3541 vc->vc_palette[k++] = default_red[j];
3542 vc->vc_palette[k++] = default_grn[j];
3543 vc->vc_palette[k++] = default_blu[j];
3544 }
3545 set_palette(vc);
3546 }
3547
3548 /*
3549 * Font switching
3550 *
3551 * Currently we only support fonts up to 32 pixels wide, at a maximum height
3552 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
3553 * depending on width) reserved for each character which is kinda wasty, but
3554 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
3555 * is upto the actual low-level console-driver convert data into its favorite
3556 * format (maybe we should add a `fontoffset' field to the `display'
3557 * structure so we won't have to convert the fontdata all the time.
3558 * /Jes
3559 */
3560
3561 #define max_font_size 65536
3562
3563 static int con_font_get(struct vc_data *vc, struct console_font_op *op)
3564 {
3565 struct console_font font;
3566 int rc = -EINVAL;
3567 int c;
3568
3569 if (vc->vc_mode != KD_TEXT)
3570 return -EINVAL;
3571
3572 if (op->data) {
3573 font.data = kmalloc(max_font_size, GFP_KERNEL);
3574 if (!font.data)
3575 return -ENOMEM;
3576 } else
3577 font.data = NULL;
3578
3579 acquire_console_sem();
3580 if (vc->vc_sw->con_font_get)
3581 rc = vc->vc_sw->con_font_get(vc, &font);
3582 else
3583 rc = -ENOSYS;
3584 release_console_sem();
3585
3586 if (rc)
3587 goto out;
3588
3589 c = (font.width+7)/8 * 32 * font.charcount;
3590
3591 if (op->data && font.charcount > op->charcount)
3592 rc = -ENOSPC;
3593 if (!(op->flags & KD_FONT_FLAG_OLD)) {
3594 if (font.width > op->width || font.height > op->height)
3595 rc = -ENOSPC;
3596 } else {
3597 if (font.width != 8)
3598 rc = -EIO;
3599 else if ((op->height && font.height > op->height) ||
3600 font.height > 32)
3601 rc = -ENOSPC;
3602 }
3603 if (rc)
3604 goto out;
3605
3606 op->height = font.height;
3607 op->width = font.width;
3608 op->charcount = font.charcount;
3609
3610 if (op->data && copy_to_user(op->data, font.data, c))
3611 rc = -EFAULT;
3612
3613 out:
3614 kfree(font.data);
3615 return rc;
3616 }
3617
3618 static int con_font_set(struct vc_data *vc, struct console_font_op *op)
3619 {
3620 struct console_font font;
3621 int rc = -EINVAL;
3622 int size;
3623
3624 if (vc->vc_mode != KD_TEXT)
3625 return -EINVAL;
3626 if (!op->data)
3627 return -EINVAL;
3628 if (op->charcount > 512)
3629 return -EINVAL;
3630 if (!op->height) { /* Need to guess font height [compat] */
3631 int h, i;
3632 u8 __user *charmap = op->data;
3633 u8 tmp;
3634
3635 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
3636 so that we can get rid of this soon */
3637 if (!(op->flags & KD_FONT_FLAG_OLD))
3638 return -EINVAL;
3639 for (h = 32; h > 0; h--)
3640 for (i = 0; i < op->charcount; i++) {
3641 if (get_user(tmp, &charmap[32*i+h-1]))
3642 return -EFAULT;
3643 if (tmp)
3644 goto nonzero;
3645 }
3646 return -EINVAL;
3647 nonzero:
3648 op->height = h;
3649 }
3650 if (op->width <= 0 || op->width > 32 || op->height > 32)
3651 return -EINVAL;
3652 size = (op->width+7)/8 * 32 * op->charcount;
3653 if (size > max_font_size)
3654 return -ENOSPC;
3655 font.charcount = op->charcount;
3656 font.height = op->height;
3657 font.width = op->width;
3658 font.data = kmalloc(size, GFP_KERNEL);
3659 if (!font.data)
3660 return -ENOMEM;
3661 if (copy_from_user(font.data, op->data, size)) {
3662 kfree(font.data);
3663 return -EFAULT;
3664 }
3665 acquire_console_sem();
3666 if (vc->vc_sw->con_font_set)
3667 rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
3668 else
3669 rc = -ENOSYS;
3670 release_console_sem();
3671 kfree(font.data);
3672 return rc;
3673 }
3674
3675 static int con_font_default(struct vc_data *vc, struct console_font_op *op)
3676 {
3677 struct console_font font = {.width = op->width, .height = op->height};
3678 char name[MAX_FONT_NAME];
3679 char *s = name;
3680 int rc;
3681
3682 if (vc->vc_mode != KD_TEXT)
3683 return -EINVAL;
3684
3685 if (!op->data)
3686 s = NULL;
3687 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0)
3688 return -EFAULT;
3689 else
3690 name[MAX_FONT_NAME - 1] = 0;
3691
3692 acquire_console_sem();
3693 if (vc->vc_sw->con_font_default)
3694 rc = vc->vc_sw->con_font_default(vc, &font, s);
3695 else
3696 rc = -ENOSYS;
3697 release_console_sem();
3698 if (!rc) {
3699 op->width = font.width;
3700 op->height = font.height;
3701 }
3702 return rc;
3703 }
3704
3705 static int con_font_copy(struct vc_data *vc, struct console_font_op *op)
3706 {
3707 int con = op->height;
3708 int rc;
3709
3710 if (vc->vc_mode != KD_TEXT)
3711 return -EINVAL;
3712
3713 acquire_console_sem();
3714 if (!vc->vc_sw->con_font_copy)
3715 rc = -ENOSYS;
3716 else if (con < 0 || !vc_cons_allocated(con))
3717 rc = -ENOTTY;
3718 else if (con == vc->vc_num) /* nothing to do */
3719 rc = 0;
3720 else
3721 rc = vc->vc_sw->con_font_copy(vc, con);
3722 release_console_sem();
3723 return rc;
3724 }
3725
3726 int con_font_op(struct vc_data *vc, struct console_font_op *op)
3727 {
3728 switch (op->op) {
3729 case KD_FONT_OP_SET:
3730 return con_font_set(vc, op);
3731 case KD_FONT_OP_GET:
3732 return con_font_get(vc, op);
3733 case KD_FONT_OP_SET_DEFAULT:
3734 return con_font_default(vc, op);
3735 case KD_FONT_OP_COPY:
3736 return con_font_copy(vc, op);
3737 }
3738 return -ENOSYS;
3739 }
3740
3741 /*
3742 * Interface exported to selection and vcs.
3743 */
3744
3745 /* used by selection */
3746 u16 screen_glyph(struct vc_data *vc, int offset)
3747 {
3748 u16 w = scr_readw(screenpos(vc, offset, 1));
3749 u16 c = w & 0xff;
3750
3751 if (w & vc->vc_hi_font_mask)
3752 c |= 0x100;
3753 return c;
3754 }
3755
3756 /* used by vcs - note the word offset */
3757 unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed)
3758 {
3759 return screenpos(vc, 2 * w_offset, viewed);
3760 }
3761
3762 void getconsxy(struct vc_data *vc, unsigned char *p)
3763 {
3764 p[0] = vc->vc_x;
3765 p[1] = vc->vc_y;
3766 }
3767
3768 void putconsxy(struct vc_data *vc, unsigned char *p)
3769 {
3770 hide_cursor(vc);
3771 gotoxy(vc, p[0], p[1]);
3772 set_cursor(vc);
3773 }
3774
3775 u16 vcs_scr_readw(struct vc_data *vc, const u16 *org)
3776 {
3777 if ((unsigned long)org == vc->vc_pos && softcursor_original != -1)
3778 return softcursor_original;
3779 return scr_readw(org);
3780 }
3781
3782 void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org)
3783 {
3784 scr_writew(val, org);
3785 if ((unsigned long)org == vc->vc_pos) {
3786 softcursor_original = -1;
3787 add_softcursor(vc);
3788 }
3789 }
3790
3791 /*
3792 * Visible symbols for modules
3793 */
3794
3795 EXPORT_SYMBOL(color_table);
3796 EXPORT_SYMBOL(default_red);
3797 EXPORT_SYMBOL(default_grn);
3798 EXPORT_SYMBOL(default_blu);
3799 EXPORT_SYMBOL(update_region);
3800 EXPORT_SYMBOL(redraw_screen);
3801 EXPORT_SYMBOL(vc_resize);
3802 EXPORT_SYMBOL(vc_lock_resize);
3803 EXPORT_SYMBOL(fg_console);
3804 EXPORT_SYMBOL(console_blank_hook);
3805 EXPORT_SYMBOL(console_blanked);
3806 EXPORT_SYMBOL(vc_cons);
3807 #ifndef VT_SINGLE_DRIVER
3808 EXPORT_SYMBOL(take_over_console);
3809 EXPORT_SYMBOL(give_up_console);
3810 #endif
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