projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
[PATCH] vt: Honor the return value of device_create_file
[deliverable/linux.git] / drivers / char / vt.c
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 #define CON_DRIVER_FLAG_ATTR 4
111
112 struct con_driver {
113 const struct consw *con;
114 const char *desc;
115 struct class_device *class_dev;
116 int node;
117 int first;
118 int last;
119 int flag;
120 };
121
122 static struct con_driver registered_con_driver[MAX_NR_CON_DRIVER];
123 const struct consw *conswitchp;
124
125 /* A bitmap for codes <32. A bit of 1 indicates that the code
126 * corresponding to that bit number invokes some special action
127 * (such as cursor movement) and should not be displayed as a
128 * glyph unless the disp_ctrl mode is explicitly enabled.
129 */
130 #define CTRL_ACTION 0x0d00ff81
131 #define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */
132
133 /*
134 * Here is the default bell parameters: 750HZ, 1/8th of a second
135 */
136 #define DEFAULT_BELL_PITCH 750
137 #define DEFAULT_BELL_DURATION (HZ/8)
138
139 extern void vcs_make_sysfs(struct tty_struct *tty);
140 extern void vcs_remove_sysfs(struct tty_struct *tty);
141
142 extern void console_map_init(void);
143 #ifdef CONFIG_PROM_CONSOLE
144 extern void prom_con_init(void);
145 #endif
146 #ifdef CONFIG_MDA_CONSOLE
147 extern int mda_console_init(void);
148 #endif
149
150 struct vc vc_cons [MAX_NR_CONSOLES];
151
152 #ifndef VT_SINGLE_DRIVER
153 static const struct consw *con_driver_map[MAX_NR_CONSOLES];
154 #endif
155
156 static int con_open(struct tty_struct *, struct file *);
157 static void vc_init(struct vc_data *vc, unsigned int rows,
158 unsigned int cols, int do_clear);
159 static void gotoxy(struct vc_data *vc, int new_x, int new_y);
160 static void save_cur(struct vc_data *vc);
161 static void reset_terminal(struct vc_data *vc, int do_clear);
162 static void con_flush_chars(struct tty_struct *tty);
163 static void set_vesa_blanking(char __user *p);
164 static void set_cursor(struct vc_data *vc);
165 static void hide_cursor(struct vc_data *vc);
166 static void console_callback(void *ignored);
167 static void blank_screen_t(unsigned long dummy);
168 static void set_palette(struct vc_data *vc);
169
170 static int printable; /* Is console ready for printing? */
171
172 /*
173 * ignore_poke: don't unblank the screen when things are typed. This is
174 * mainly for the privacy of braille terminal users.
175 */
176 static int ignore_poke;
177
178 int do_poke_blanked_console;
179 int console_blanked;
180
181 static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
182 static int blankinterval = 10*60*HZ;
183 static int vesa_off_interval;
184
185 static DECLARE_WORK(console_work, console_callback, NULL);
186
187 /*
188 * fg_console is the current virtual console,
189 * last_console is the last used one,
190 * want_console is the console we want to switch to,
191 * kmsg_redirect is the console for kernel messages,
192 */
193 int fg_console;
194 int last_console;
195 int want_console = -1;
196 int kmsg_redirect;
197
198 /*
199 * For each existing display, we have a pointer to console currently visible
200 * on that display, allowing consoles other than fg_console to be refreshed
201 * appropriately. Unless the low-level driver supplies its own display_fg
202 * variable, we use this one for the "master display".
203 */
204 static struct vc_data *master_display_fg;
205
206 /*
207 * Unfortunately, we need to delay tty echo when we're currently writing to the
208 * console since the code is (and always was) not re-entrant, so we schedule
209 * all flip requests to process context with schedule-task() and run it from
210 * console_callback().
211 */
212
213 /*
214 * For the same reason, we defer scrollback to the console callback.
215 */
216 static int scrollback_delta;
217
218 /*
219 * Hook so that the power management routines can (un)blank
220 * the console on our behalf.
221 */
222 int (*console_blank_hook)(int);
223
224 static struct timer_list console_timer;
225 static int blank_state;
226 static int blank_timer_expired;
227 enum {
228 blank_off = 0,
229 blank_normal_wait,
230 blank_vesa_wait,
231 };
232
233 /*
234 * Low-Level Functions
235 */
236
237 #define IS_FG(vc) ((vc)->vc_num == fg_console)
238
239 #ifdef VT_BUF_VRAM_ONLY
240 #define DO_UPDATE(vc) 0
241 #else
242 #define DO_UPDATE(vc) CON_IS_VISIBLE(vc)
243 #endif
244
245 static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed)
246 {
247 unsigned short *p;
248
249 if (!viewed)
250 p = (unsigned short *)(vc->vc_origin + offset);
251 else if (!vc->vc_sw->con_screen_pos)
252 p = (unsigned short *)(vc->vc_visible_origin + offset);
253 else
254 p = vc->vc_sw->con_screen_pos(vc, offset);
255 return p;
256 }
257
258 static inline void scrolldelta(int lines)
259 {
260 scrollback_delta += lines;
261 schedule_console_callback();
262 }
263
264 void schedule_console_callback(void)
265 {
266 schedule_work(&console_work);
267 }
268
269 static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
270 {
271 unsigned short *d, *s;
272
273 if (t+nr >= b)
274 nr = b - t - 1;
275 if (b > vc->vc_rows || t >= b || nr < 1)
276 return;
277 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr))
278 return;
279 d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
280 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr));
281 scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row);
282 scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_video_erase_char,
283 vc->vc_size_row * nr);
284 }
285
286 static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
287 {
288 unsigned short *s;
289 unsigned int step;
290
291 if (t+nr >= b)
292 nr = b - t - 1;
293 if (b > vc->vc_rows || t >= b || nr < 1)
294 return;
295 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr))
296 return;
297 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
298 step = vc->vc_cols * nr;
299 scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row);
300 scr_memsetw(s, vc->vc_video_erase_char, 2 * step);
301 }
302
303 static void do_update_region(struct vc_data *vc, unsigned long start, int count)
304 {
305 #ifndef VT_BUF_VRAM_ONLY
306 unsigned int xx, yy, offset;
307 u16 *p;
308
309 p = (u16 *) start;
310 if (!vc->vc_sw->con_getxy) {
311 offset = (start - vc->vc_origin) / 2;
312 xx = offset % vc->vc_cols;
313 yy = offset / vc->vc_cols;
314 } else {
315 int nxx, nyy;
316 start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy);
317 xx = nxx; yy = nyy;
318 }
319 for(;;) {
320 u16 attrib = scr_readw(p) & 0xff00;
321 int startx = xx;
322 u16 *q = p;
323 while (xx < vc->vc_cols && count) {
324 if (attrib != (scr_readw(p) & 0xff00)) {
325 if (p > q)
326 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
327 startx = xx;
328 q = p;
329 attrib = scr_readw(p) & 0xff00;
330 }
331 p++;
332 xx++;
333 count--;
334 }
335 if (p > q)
336 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
337 if (!count)
338 break;
339 xx = 0;
340 yy++;
341 if (vc->vc_sw->con_getxy) {
342 p = (u16 *)start;
343 start = vc->vc_sw->con_getxy(vc, start, NULL, NULL);
344 }
345 }
346 #endif
347 }
348
349 void update_region(struct vc_data *vc, unsigned long start, int count)
350 {
351 WARN_CONSOLE_UNLOCKED();
352
353 if (DO_UPDATE(vc)) {
354 hide_cursor(vc);
355 do_update_region(vc, start, count);
356 set_cursor(vc);
357 }
358 }
359
360 /* Structure of attributes is hardware-dependent */
361
362 static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink, u8 _underline, u8 _reverse)
363 {
364 if (vc->vc_sw->con_build_attr)
365 return vc->vc_sw->con_build_attr(vc, _color, _intensity, _blink, _underline, _reverse);
366
367 #ifndef VT_BUF_VRAM_ONLY
368 /*
369 * ++roman: I completely changed the attribute format for monochrome
370 * mode (!can_do_color). The formerly used MDA (monochrome display
371 * adapter) format didn't allow the combination of certain effects.
372 * Now the attribute is just a bit vector:
373 * Bit 0..1: intensity (0..2)
374 * Bit 2 : underline
375 * Bit 3 : reverse
376 * Bit 7 : blink
377 */
378 {
379 u8 a = vc->vc_color;
380 if (!vc->vc_can_do_color)
381 return _intensity |
382 (_underline ? 4 : 0) |
383 (_reverse ? 8 : 0) |
384 (_blink ? 0x80 : 0);
385 if (_underline)
386 a = (a & 0xf0) | vc->vc_ulcolor;
387 else if (_intensity == 0)
388 a = (a & 0xf0) | vc->vc_ulcolor;
389 if (_reverse)
390 a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77);
391 if (_blink)
392 a ^= 0x80;
393 if (_intensity == 2)
394 a ^= 0x08;
395 if (vc->vc_hi_font_mask == 0x100)
396 a <<= 1;
397 return a;
398 }
399 #else
400 return 0;
401 #endif
402 }
403
404 static void update_attr(struct vc_data *vc)
405 {
406 vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity, vc->vc_blink, vc->vc_underline, vc->vc_reverse ^ vc->vc_decscnm);
407 vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm) << 8) | ' ';
408 }
409
410 /* Note: inverting the screen twice should revert to the original state */
411 void invert_screen(struct vc_data *vc, int offset, int count, int viewed)
412 {
413 unsigned short *p;
414
415 WARN_CONSOLE_UNLOCKED();
416
417 count /= 2;
418 p = screenpos(vc, offset, viewed);
419 if (vc->vc_sw->con_invert_region)
420 vc->vc_sw->con_invert_region(vc, p, count);
421 #ifndef VT_BUF_VRAM_ONLY
422 else {
423 u16 *q = p;
424 int cnt = count;
425 u16 a;
426
427 if (!vc->vc_can_do_color) {
428 while (cnt--) {
429 a = scr_readw(q);
430 a ^= 0x0800;
431 scr_writew(a, q);
432 q++;
433 }
434 } else if (vc->vc_hi_font_mask == 0x100) {
435 while (cnt--) {
436 a = scr_readw(q);
437 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4);
438 scr_writew(a, q);
439 q++;
440 }
441 } else {
442 while (cnt--) {
443 a = scr_readw(q);
444 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4);
445 scr_writew(a, q);
446 q++;
447 }
448 }
449 }
450 #endif
451 if (DO_UPDATE(vc))
452 do_update_region(vc, (unsigned long) p, count);
453 }
454
455 /* used by selection: complement pointer position */
456 void complement_pos(struct vc_data *vc, int offset)
457 {
458 static int old_offset = -1;
459 static unsigned short old;
460 static unsigned short oldx, oldy;
461
462 WARN_CONSOLE_UNLOCKED();
463
464 if (old_offset != -1 && old_offset >= 0 &&
465 old_offset < vc->vc_screenbuf_size) {
466 scr_writew(old, screenpos(vc, old_offset, 1));
467 if (DO_UPDATE(vc))
468 vc->vc_sw->con_putc(vc, old, oldy, oldx);
469 }
470
471 old_offset = offset;
472
473 if (offset != -1 && offset >= 0 &&
474 offset < vc->vc_screenbuf_size) {
475 unsigned short new;
476 unsigned short *p;
477 p = screenpos(vc, offset, 1);
478 old = scr_readw(p);
479 new = old ^ vc->vc_complement_mask;
480 scr_writew(new, p);
481 if (DO_UPDATE(vc)) {
482 oldx = (offset >> 1) % vc->vc_cols;
483 oldy = (offset >> 1) / vc->vc_cols;
484 vc->vc_sw->con_putc(vc, new, oldy, oldx);
485 }
486 }
487
488 }
489
490 static void insert_char(struct vc_data *vc, unsigned int nr)
491 {
492 unsigned short *p, *q = (unsigned short *)vc->vc_pos;
493
494 p = q + vc->vc_cols - nr - vc->vc_x;
495 while (--p >= q)
496 scr_writew(scr_readw(p), p + nr);
497 scr_memsetw(q, vc->vc_video_erase_char, nr * 2);
498 vc->vc_need_wrap = 0;
499 if (DO_UPDATE(vc)) {
500 unsigned short oldattr = vc->vc_attr;
501 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x, vc->vc_y, vc->vc_x + nr, 1,
502 vc->vc_cols - vc->vc_x - nr);
503 vc->vc_attr = vc->vc_video_erase_char >> 8;
504 while (nr--)
505 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y, vc->vc_x + nr);
506 vc->vc_attr = oldattr;
507 }
508 }
509
510 static void delete_char(struct vc_data *vc, unsigned int nr)
511 {
512 unsigned int i = vc->vc_x;
513 unsigned short *p = (unsigned short *)vc->vc_pos;
514
515 while (++i <= vc->vc_cols - nr) {
516 scr_writew(scr_readw(p+nr), p);
517 p++;
518 }
519 scr_memsetw(p, vc->vc_video_erase_char, nr * 2);
520 vc->vc_need_wrap = 0;
521 if (DO_UPDATE(vc)) {
522 unsigned short oldattr = vc->vc_attr;
523 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x + nr, vc->vc_y, vc->vc_x, 1,
524 vc->vc_cols - vc->vc_x - nr);
525 vc->vc_attr = vc->vc_video_erase_char >> 8;
526 while (nr--)
527 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y,
528 vc->vc_cols - 1 - nr);
529 vc->vc_attr = oldattr;
530 }
531 }
532
533 static int softcursor_original;
534
535 static void add_softcursor(struct vc_data *vc)
536 {
537 int i = scr_readw((u16 *) vc->vc_pos);
538 u32 type = vc->vc_cursor_type;
539
540 if (! (type & 0x10)) return;
541 if (softcursor_original != -1) return;
542 softcursor_original = i;
543 i |= ((type >> 8) & 0xff00 );
544 i ^= ((type) & 0xff00 );
545 if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000;
546 if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700;
547 scr_writew(i, (u16 *) vc->vc_pos);
548 if (DO_UPDATE(vc))
549 vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x);
550 }
551
552 static void hide_softcursor(struct vc_data *vc)
553 {
554 if (softcursor_original != -1) {
555 scr_writew(softcursor_original, (u16 *)vc->vc_pos);
556 if (DO_UPDATE(vc))
557 vc->vc_sw->con_putc(vc, softcursor_original,
558 vc->vc_y, vc->vc_x);
559 softcursor_original = -1;
560 }
561 }
562
563 static void hide_cursor(struct vc_data *vc)
564 {
565 if (vc == sel_cons)
566 clear_selection();
567 vc->vc_sw->con_cursor(vc, CM_ERASE);
568 hide_softcursor(vc);
569 }
570
571 static void set_cursor(struct vc_data *vc)
572 {
573 if (!IS_FG(vc) || console_blanked ||
574 vc->vc_mode == KD_GRAPHICS)
575 return;
576 if (vc->vc_deccm) {
577 if (vc == sel_cons)
578 clear_selection();
579 add_softcursor(vc);
580 if ((vc->vc_cursor_type & 0x0f) != 1)
581 vc->vc_sw->con_cursor(vc, CM_DRAW);
582 } else
583 hide_cursor(vc);
584 }
585
586 static void set_origin(struct vc_data *vc)
587 {
588 WARN_CONSOLE_UNLOCKED();
589
590 if (!CON_IS_VISIBLE(vc) ||
591 !vc->vc_sw->con_set_origin ||
592 !vc->vc_sw->con_set_origin(vc))
593 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
594 vc->vc_visible_origin = vc->vc_origin;
595 vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size;
596 vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x;
597 }
598
599 static inline void save_screen(struct vc_data *vc)
600 {
601 WARN_CONSOLE_UNLOCKED();
602
603 if (vc->vc_sw->con_save_screen)
604 vc->vc_sw->con_save_screen(vc);
605 }
606
607 /*
608 * Redrawing of screen
609 */
610
611 static void clear_buffer_attributes(struct vc_data *vc)
612 {
613 unsigned short *p = (unsigned short *)vc->vc_origin;
614 int count = vc->vc_screenbuf_size / 2;
615 int mask = vc->vc_hi_font_mask | 0xff;
616
617 for (; count > 0; count--, p++) {
618 scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p);
619 }
620 }
621
622 void redraw_screen(struct vc_data *vc, int is_switch)
623 {
624 int redraw = 0;
625
626 WARN_CONSOLE_UNLOCKED();
627
628 if (!vc) {
629 /* strange ... */
630 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
631 return;
632 }
633
634 if (is_switch) {
635 struct vc_data *old_vc = vc_cons[fg_console].d;
636 if (old_vc == vc)
637 return;
638 if (!CON_IS_VISIBLE(vc))
639 redraw = 1;
640 *vc->vc_display_fg = vc;
641 fg_console = vc->vc_num;
642 hide_cursor(old_vc);
643 if (!CON_IS_VISIBLE(old_vc)) {
644 save_screen(old_vc);
645 set_origin(old_vc);
646 }
647 } else {
648 hide_cursor(vc);
649 redraw = 1;
650 }
651
652 if (redraw) {
653 int update;
654 int old_was_color = vc->vc_can_do_color;
655
656 set_origin(vc);
657 update = vc->vc_sw->con_switch(vc);
658 set_palette(vc);
659 /*
660 * If console changed from mono<->color, the best we can do
661 * is to clear the buffer attributes. As it currently stands,
662 * rebuilding new attributes from the old buffer is not doable
663 * without overly complex code.
664 */
665 if (old_was_color != vc->vc_can_do_color) {
666 update_attr(vc);
667 clear_buffer_attributes(vc);
668 }
669 if (update && vc->vc_mode != KD_GRAPHICS)
670 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
671 }
672 set_cursor(vc);
673 if (is_switch) {
674 set_leds();
675 compute_shiftstate();
676 }
677 }
678
679 /*
680 * Allocation, freeing and resizing of VTs.
681 */
682
683 int vc_cons_allocated(unsigned int i)
684 {
685 return (i < MAX_NR_CONSOLES && vc_cons[i].d);
686 }
687
688 static void visual_init(struct vc_data *vc, int num, int init)
689 {
690 /* ++Geert: vc->vc_sw->con_init determines console size */
691 if (vc->vc_sw)
692 module_put(vc->vc_sw->owner);
693 vc->vc_sw = conswitchp;
694 #ifndef VT_SINGLE_DRIVER
695 if (con_driver_map[num])
696 vc->vc_sw = con_driver_map[num];
697 #endif
698 __module_get(vc->vc_sw->owner);
699 vc->vc_num = num;
700 vc->vc_display_fg = &master_display_fg;
701 vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir;
702 vc->vc_uni_pagedir = 0;
703 vc->vc_hi_font_mask = 0;
704 vc->vc_complement_mask = 0;
705 vc->vc_can_do_color = 0;
706 vc->vc_sw->con_init(vc, init);
707 if (!vc->vc_complement_mask)
708 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
709 vc->vc_s_complement_mask = vc->vc_complement_mask;
710 vc->vc_size_row = vc->vc_cols << 1;
711 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
712 }
713
714 int vc_allocate(unsigned int currcons) /* return 0 on success */
715 {
716 WARN_CONSOLE_UNLOCKED();
717
718 if (currcons >= MAX_NR_CONSOLES)
719 return -ENXIO;
720 if (!vc_cons[currcons].d) {
721 struct vc_data *vc;
722
723 /* prevent users from taking too much memory */
724 if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE))
725 return -EPERM;
726
727 /* due to the granularity of kmalloc, we waste some memory here */
728 /* the alloc is done in two steps, to optimize the common situation
729 of a 25x80 console (structsize=216, screenbuf_size=4000) */
730 /* although the numbers above are not valid since long ago, the
731 point is still up-to-date and the comment still has its value
732 even if only as a historical artifact. --mj, July 1998 */
733 vc = kmalloc(sizeof(struct vc_data), GFP_KERNEL);
734 if (!vc)
735 return -ENOMEM;
736 memset(vc, 0, sizeof(*vc));
737 vc_cons[currcons].d = vc;
738 visual_init(vc, currcons, 1);
739 if (!*vc->vc_uni_pagedir_loc)
740 con_set_default_unimap(vc);
741 if (!vc->vc_kmalloced)
742 vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL);
743 if (!vc->vc_screenbuf) {
744 kfree(vc);
745 vc_cons[currcons].d = NULL;
746 return -ENOMEM;
747 }
748 vc->vc_kmalloced = 1;
749 vc_init(vc, vc->vc_rows, vc->vc_cols, 1);
750 }
751 return 0;
752 }
753
754 static inline int resize_screen(struct vc_data *vc, int width, int height)
755 {
756 /* Resizes the resolution of the display adapater */
757 int err = 0;
758
759 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize)
760 err = vc->vc_sw->con_resize(vc, width, height);
761 return err;
762 }
763
764 /*
765 * Change # of rows and columns (0 means unchanged/the size of fg_console)
766 * [this is to be used together with some user program
767 * like resize that changes the hardware videomode]
768 */
769 #define VC_RESIZE_MAXCOL (32767)
770 #define VC_RESIZE_MAXROW (32767)
771 int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int lines)
772 {
773 unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0;
774 unsigned int old_cols, old_rows, old_row_size, old_screen_size;
775 unsigned int new_cols, new_rows, new_row_size, new_screen_size;
776 unsigned int end;
777 unsigned short *newscreen;
778
779 WARN_CONSOLE_UNLOCKED();
780
781 if (!vc)
782 return -ENXIO;
783
784 if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW)
785 return -EINVAL;
786
787 new_cols = (cols ? cols : vc->vc_cols);
788 new_rows = (lines ? lines : vc->vc_rows);
789 new_row_size = new_cols << 1;
790 new_screen_size = new_row_size * new_rows;
791
792 if (new_cols == vc->vc_cols && new_rows == vc->vc_rows)
793 return 0;
794
795 newscreen = (unsigned short *) kmalloc(new_screen_size, GFP_USER);
796 if (!newscreen)
797 return -ENOMEM;
798
799 old_rows = vc->vc_rows;
800 old_cols = vc->vc_cols;
801 old_row_size = vc->vc_size_row;
802 old_screen_size = vc->vc_screenbuf_size;
803
804 err = resize_screen(vc, new_cols, new_rows);
805 if (err) {
806 kfree(newscreen);
807 return err;
808 }
809
810 vc->vc_rows = new_rows;
811 vc->vc_cols = new_cols;
812 vc->vc_size_row = new_row_size;
813 vc->vc_screenbuf_size = new_screen_size;
814
815 rlth = min(old_row_size, new_row_size);
816 rrem = new_row_size - rlth;
817 old_origin = vc->vc_origin;
818 new_origin = (long) newscreen;
819 new_scr_end = new_origin + new_screen_size;
820
821 if (vc->vc_y > new_rows) {
822 if (old_rows - vc->vc_y < new_rows) {
823 /*
824 * Cursor near the bottom, copy contents from the
825 * bottom of buffer
826 */
827 old_origin += (old_rows - new_rows) * old_row_size;
828 end = vc->vc_scr_end;
829 } else {
830 /*
831 * Cursor is in no man's land, copy 1/2 screenful
832 * from the top and bottom of cursor position
833 */
834 old_origin += (vc->vc_y - new_rows/2) * old_row_size;
835 end = old_origin + (old_row_size * new_rows);
836 }
837 } else
838 /*
839 * Cursor near the top, copy contents from the top of buffer
840 */
841 end = (old_rows > new_rows) ? old_origin +
842 (old_row_size * new_rows) :
843 vc->vc_scr_end;
844
845 update_attr(vc);
846
847 while (old_origin < end) {
848 scr_memcpyw((unsigned short *) new_origin,
849 (unsigned short *) old_origin, rlth);
850 if (rrem)
851 scr_memsetw((void *)(new_origin + rlth),
852 vc->vc_video_erase_char, rrem);
853 old_origin += old_row_size;
854 new_origin += new_row_size;
855 }
856 if (new_scr_end > new_origin)
857 scr_memsetw((void *)new_origin, vc->vc_video_erase_char,
858 new_scr_end - new_origin);
859 if (vc->vc_kmalloced)
860 kfree(vc->vc_screenbuf);
861 vc->vc_screenbuf = newscreen;
862 vc->vc_kmalloced = 1;
863 vc->vc_screenbuf_size = new_screen_size;
864 set_origin(vc);
865
866 /* do part of a reset_terminal() */
867 vc->vc_top = 0;
868 vc->vc_bottom = vc->vc_rows;
869 gotoxy(vc, vc->vc_x, vc->vc_y);
870 save_cur(vc);
871
872 if (vc->vc_tty) {
873 struct winsize ws, *cws = &vc->vc_tty->winsize;
874
875 memset(&ws, 0, sizeof(ws));
876 ws.ws_row = vc->vc_rows;
877 ws.ws_col = vc->vc_cols;
878 ws.ws_ypixel = vc->vc_scan_lines;
879 if ((ws.ws_row != cws->ws_row || ws.ws_col != cws->ws_col) &&
880 vc->vc_tty->pgrp > 0)
881 kill_pg(vc->vc_tty->pgrp, SIGWINCH, 1);
882 *cws = ws;
883 }
884
885 if (CON_IS_VISIBLE(vc))
886 update_screen(vc);
887 return err;
888 }
889
890 int vc_lock_resize(struct vc_data *vc, unsigned int cols, unsigned int lines)
891 {
892 int rc;
893
894 acquire_console_sem();
895 rc = vc_resize(vc, cols, lines);
896 release_console_sem();
897 return rc;
898 }
899
900 void vc_deallocate(unsigned int currcons)
901 {
902 WARN_CONSOLE_UNLOCKED();
903
904 if (vc_cons_allocated(currcons)) {
905 struct vc_data *vc = vc_cons[currcons].d;
906 vc->vc_sw->con_deinit(vc);
907 put_pid(vc->vt_pid);
908 module_put(vc->vc_sw->owner);
909 if (vc->vc_kmalloced)
910 kfree(vc->vc_screenbuf);
911 if (currcons >= MIN_NR_CONSOLES)
912 kfree(vc);
913 vc_cons[currcons].d = NULL;
914 }
915 }
916
917 /*
918 * VT102 emulator
919 */
920
921 #define set_kbd(vc, x) set_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
922 #define clr_kbd(vc, x) clr_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
923 #define is_kbd(vc, x) vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
924
925 #define decarm VC_REPEAT
926 #define decckm VC_CKMODE
927 #define kbdapplic VC_APPLIC
928 #define lnm VC_CRLF
929
930 /*
931 * this is what the terminal answers to a ESC-Z or csi0c query.
932 */
933 #define VT100ID "\033[?1;2c"
934 #define VT102ID "\033[?6c"
935
936 unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7,
937 8,12,10,14, 9,13,11,15 };
938
939 /* the default colour table, for VGA+ colour systems */
940 int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
941 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
942 int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
943 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
944 int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
945 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
946
947 /*
948 * gotoxy() must verify all boundaries, because the arguments
949 * might also be negative. If the given position is out of
950 * bounds, the cursor is placed at the nearest margin.
951 */
952 static void gotoxy(struct vc_data *vc, int new_x, int new_y)
953 {
954 int min_y, max_y;
955
956 if (new_x < 0)
957 vc->vc_x = 0;
958 else {
959 if (new_x >= vc->vc_cols)
960 vc->vc_x = vc->vc_cols - 1;
961 else
962 vc->vc_x = new_x;
963 }
964
965 if (vc->vc_decom) {
966 min_y = vc->vc_top;
967 max_y = vc->vc_bottom;
968 } else {
969 min_y = 0;
970 max_y = vc->vc_rows;
971 }
972 if (new_y < min_y)
973 vc->vc_y = min_y;
974 else if (new_y >= max_y)
975 vc->vc_y = max_y - 1;
976 else
977 vc->vc_y = new_y;
978 vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1);
979 vc->vc_need_wrap = 0;
980 }
981
982 /* for absolute user moves, when decom is set */
983 static void gotoxay(struct vc_data *vc, int new_x, int new_y)
984 {
985 gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y);
986 }
987
988 void scrollback(struct vc_data *vc, int lines)
989 {
990 if (!lines)
991 lines = vc->vc_rows / 2;
992 scrolldelta(-lines);
993 }
994
995 void scrollfront(struct vc_data *vc, int lines)
996 {
997 if (!lines)
998 lines = vc->vc_rows / 2;
999 scrolldelta(lines);
1000 }
1001
1002 static void lf(struct vc_data *vc)
1003 {
1004 /* don't scroll if above bottom of scrolling region, or
1005 * if below scrolling region
1006 */
1007 if (vc->vc_y + 1 == vc->vc_bottom)
1008 scrup(vc, vc->vc_top, vc->vc_bottom, 1);
1009 else if (vc->vc_y < vc->vc_rows - 1) {
1010 vc->vc_y++;
1011 vc->vc_pos += vc->vc_size_row;
1012 }
1013 vc->vc_need_wrap = 0;
1014 }
1015
1016 static void ri(struct vc_data *vc)
1017 {
1018 /* don't scroll if below top of scrolling region, or
1019 * if above scrolling region
1020 */
1021 if (vc->vc_y == vc->vc_top)
1022 scrdown(vc, vc->vc_top, vc->vc_bottom, 1);
1023 else if (vc->vc_y > 0) {
1024 vc->vc_y--;
1025 vc->vc_pos -= vc->vc_size_row;
1026 }
1027 vc->vc_need_wrap = 0;
1028 }
1029
1030 static inline void cr(struct vc_data *vc)
1031 {
1032 vc->vc_pos -= vc->vc_x << 1;
1033 vc->vc_need_wrap = vc->vc_x = 0;
1034 }
1035
1036 static inline void bs(struct vc_data *vc)
1037 {
1038 if (vc->vc_x) {
1039 vc->vc_pos -= 2;
1040 vc->vc_x--;
1041 vc->vc_need_wrap = 0;
1042 }
1043 }
1044
1045 static inline void del(struct vc_data *vc)
1046 {
1047 /* ignored */
1048 }
1049
1050 static void csi_J(struct vc_data *vc, int vpar)
1051 {
1052 unsigned int count;
1053 unsigned short * start;
1054
1055 switch (vpar) {
1056 case 0: /* erase from cursor to end of display */
1057 count = (vc->vc_scr_end - vc->vc_pos) >> 1;
1058 start = (unsigned short *)vc->vc_pos;
1059 if (DO_UPDATE(vc)) {
1060 /* do in two stages */
1061 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1062 vc->vc_cols - vc->vc_x);
1063 vc->vc_sw->con_clear(vc, vc->vc_y + 1, 0,
1064 vc->vc_rows - vc->vc_y - 1,
1065 vc->vc_cols);
1066 }
1067 break;
1068 case 1: /* erase from start to cursor */
1069 count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1;
1070 start = (unsigned short *)vc->vc_origin;
1071 if (DO_UPDATE(vc)) {
1072 /* do in two stages */
1073 vc->vc_sw->con_clear(vc, 0, 0, vc->vc_y,
1074 vc->vc_cols);
1075 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1076 vc->vc_x + 1);
1077 }
1078 break;
1079 case 2: /* erase whole display */
1080 count = vc->vc_cols * vc->vc_rows;
1081 start = (unsigned short *)vc->vc_origin;
1082 if (DO_UPDATE(vc))
1083 vc->vc_sw->con_clear(vc, 0, 0,
1084 vc->vc_rows,
1085 vc->vc_cols);
1086 break;
1087 default:
1088 return;
1089 }
1090 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1091 vc->vc_need_wrap = 0;
1092 }
1093
1094 static void csi_K(struct vc_data *vc, int vpar)
1095 {
1096 unsigned int count;
1097 unsigned short * start;
1098
1099 switch (vpar) {
1100 case 0: /* erase from cursor to end of line */
1101 count = vc->vc_cols - vc->vc_x;
1102 start = (unsigned short *)vc->vc_pos;
1103 if (DO_UPDATE(vc))
1104 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1105 vc->vc_cols - vc->vc_x);
1106 break;
1107 case 1: /* erase from start of line to cursor */
1108 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1109 count = vc->vc_x + 1;
1110 if (DO_UPDATE(vc))
1111 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1112 vc->vc_x + 1);
1113 break;
1114 case 2: /* erase whole line */
1115 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1116 count = vc->vc_cols;
1117 if (DO_UPDATE(vc))
1118 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1119 vc->vc_cols);
1120 break;
1121 default:
1122 return;
1123 }
1124 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1125 vc->vc_need_wrap = 0;
1126 }
1127
1128 static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */
1129 { /* not vt100? */
1130 int count;
1131
1132 if (!vpar)
1133 vpar++;
1134 count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar;
1135
1136 scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count);
1137 if (DO_UPDATE(vc))
1138 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count);
1139 vc->vc_need_wrap = 0;
1140 }
1141
1142 static void default_attr(struct vc_data *vc)
1143 {
1144 vc->vc_intensity = 1;
1145 vc->vc_underline = 0;
1146 vc->vc_reverse = 0;
1147 vc->vc_blink = 0;
1148 vc->vc_color = vc->vc_def_color;
1149 }
1150
1151 /* console_sem is held */
1152 static void csi_m(struct vc_data *vc)
1153 {
1154 int i;
1155
1156 for (i = 0; i <= vc->vc_npar; i++)
1157 switch (vc->vc_par[i]) {
1158 case 0: /* all attributes off */
1159 default_attr(vc);
1160 break;
1161 case 1:
1162 vc->vc_intensity = 2;
1163 break;
1164 case 2:
1165 vc->vc_intensity = 0;
1166 break;
1167 case 4:
1168 vc->vc_underline = 1;
1169 break;
1170 case 5:
1171 vc->vc_blink = 1;
1172 break;
1173 case 7:
1174 vc->vc_reverse = 1;
1175 break;
1176 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1177 * Select primary font, don't display
1178 * control chars if defined, don't set
1179 * bit 8 on output.
1180 */
1181 vc->vc_translate = set_translate(vc->vc_charset == 0
1182 ? vc->vc_G0_charset
1183 : vc->vc_G1_charset, vc);
1184 vc->vc_disp_ctrl = 0;
1185 vc->vc_toggle_meta = 0;
1186 break;
1187 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1188 * Select first alternate font, lets
1189 * chars < 32 be displayed as ROM chars.
1190 */
1191 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1192 vc->vc_disp_ctrl = 1;
1193 vc->vc_toggle_meta = 0;
1194 break;
1195 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1196 * Select second alternate font, toggle
1197 * high bit before displaying as ROM char.
1198 */
1199 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1200 vc->vc_disp_ctrl = 1;
1201 vc->vc_toggle_meta = 1;
1202 break;
1203 case 21:
1204 case 22:
1205 vc->vc_intensity = 1;
1206 break;
1207 case 24:
1208 vc->vc_underline = 0;
1209 break;
1210 case 25:
1211 vc->vc_blink = 0;
1212 break;
1213 case 27:
1214 vc->vc_reverse = 0;
1215 break;
1216 case 38: /* ANSI X3.64-1979 (SCO-ish?)
1217 * Enables underscore, white foreground
1218 * with white underscore (Linux - use
1219 * default foreground).
1220 */
1221 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1222 vc->vc_underline = 1;
1223 break;
1224 case 39: /* ANSI X3.64-1979 (SCO-ish?)
1225 * Disable underline option.
1226 * Reset colour to default? It did this
1227 * before...
1228 */
1229 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1230 vc->vc_underline = 0;
1231 break;
1232 case 49:
1233 vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f);
1234 break;
1235 default:
1236 if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37)
1237 vc->vc_color = color_table[vc->vc_par[i] - 30]
1238 | (vc->vc_color & 0xf0);
1239 else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47)
1240 vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4)
1241 | (vc->vc_color & 0x0f);
1242 break;
1243 }
1244 update_attr(vc);
1245 }
1246
1247 static void respond_string(const char *p, struct tty_struct *tty)
1248 {
1249 while (*p) {
1250 tty_insert_flip_char(tty, *p, 0);
1251 p++;
1252 }
1253 con_schedule_flip(tty);
1254 }
1255
1256 static void cursor_report(struct vc_data *vc, struct tty_struct *tty)
1257 {
1258 char buf[40];
1259
1260 sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1);
1261 respond_string(buf, tty);
1262 }
1263
1264 static inline void status_report(struct tty_struct *tty)
1265 {
1266 respond_string("\033[0n", tty); /* Terminal ok */
1267 }
1268
1269 static inline void respond_ID(struct tty_struct * tty)
1270 {
1271 respond_string(VT102ID, tty);
1272 }
1273
1274 void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry)
1275 {
1276 char buf[8];
1277
1278 sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx),
1279 (char)('!' + mry));
1280 respond_string(buf, tty);
1281 }
1282
1283 /* invoked via ioctl(TIOCLINUX) and through set_selection */
1284 int mouse_reporting(void)
1285 {
1286 return vc_cons[fg_console].d->vc_report_mouse;
1287 }
1288
1289 /* console_sem is held */
1290 static void set_mode(struct vc_data *vc, int on_off)
1291 {
1292 int i;
1293
1294 for (i = 0; i <= vc->vc_npar; i++)
1295 if (vc->vc_ques) {
1296 switch(vc->vc_par[i]) { /* DEC private modes set/reset */
1297 case 1: /* Cursor keys send ^[Ox/^[[x */
1298 if (on_off)
1299 set_kbd(vc, decckm);
1300 else
1301 clr_kbd(vc, decckm);
1302 break;
1303 case 3: /* 80/132 mode switch unimplemented */
1304 vc->vc_deccolm = on_off;
1305 #if 0
1306 vc_resize(deccolm ? 132 : 80, vc->vc_rows);
1307 /* this alone does not suffice; some user mode
1308 utility has to change the hardware regs */
1309 #endif
1310 break;
1311 case 5: /* Inverted screen on/off */
1312 if (vc->vc_decscnm != on_off) {
1313 vc->vc_decscnm = on_off;
1314 invert_screen(vc, 0, vc->vc_screenbuf_size, 0);
1315 update_attr(vc);
1316 }
1317 break;
1318 case 6: /* Origin relative/absolute */
1319 vc->vc_decom = on_off;
1320 gotoxay(vc, 0, 0);
1321 break;
1322 case 7: /* Autowrap on/off */
1323 vc->vc_decawm = on_off;
1324 break;
1325 case 8: /* Autorepeat on/off */
1326 if (on_off)
1327 set_kbd(vc, decarm);
1328 else
1329 clr_kbd(vc, decarm);
1330 break;
1331 case 9:
1332 vc->vc_report_mouse = on_off ? 1 : 0;
1333 break;
1334 case 25: /* Cursor on/off */
1335 vc->vc_deccm = on_off;
1336 break;
1337 case 1000:
1338 vc->vc_report_mouse = on_off ? 2 : 0;
1339 break;
1340 }
1341 } else {
1342 switch(vc->vc_par[i]) { /* ANSI modes set/reset */
1343 case 3: /* Monitor (display ctrls) */
1344 vc->vc_disp_ctrl = on_off;
1345 break;
1346 case 4: /* Insert Mode on/off */
1347 vc->vc_decim = on_off;
1348 break;
1349 case 20: /* Lf, Enter == CrLf/Lf */
1350 if (on_off)
1351 set_kbd(vc, lnm);
1352 else
1353 clr_kbd(vc, lnm);
1354 break;
1355 }
1356 }
1357 }
1358
1359 /* console_sem is held */
1360 static void setterm_command(struct vc_data *vc)
1361 {
1362 switch(vc->vc_par[0]) {
1363 case 1: /* set color for underline mode */
1364 if (vc->vc_can_do_color &&
1365 vc->vc_par[1] < 16) {
1366 vc->vc_ulcolor = color_table[vc->vc_par[1]];
1367 if (vc->vc_underline)
1368 update_attr(vc);
1369 }
1370 break;
1371 case 2: /* set color for half intensity mode */
1372 if (vc->vc_can_do_color &&
1373 vc->vc_par[1] < 16) {
1374 vc->vc_halfcolor = color_table[vc->vc_par[1]];
1375 if (vc->vc_intensity == 0)
1376 update_attr(vc);
1377 }
1378 break;
1379 case 8: /* store colors as defaults */
1380 vc->vc_def_color = vc->vc_attr;
1381 if (vc->vc_hi_font_mask == 0x100)
1382 vc->vc_def_color >>= 1;
1383 default_attr(vc);
1384 update_attr(vc);
1385 break;
1386 case 9: /* set blanking interval */
1387 blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1388 poke_blanked_console();
1389 break;
1390 case 10: /* set bell frequency in Hz */
1391 if (vc->vc_npar >= 1)
1392 vc->vc_bell_pitch = vc->vc_par[1];
1393 else
1394 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1395 break;
1396 case 11: /* set bell duration in msec */
1397 if (vc->vc_npar >= 1)
1398 vc->vc_bell_duration = (vc->vc_par[1] < 2000) ?
1399 vc->vc_par[1] * HZ / 1000 : 0;
1400 else
1401 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1402 break;
1403 case 12: /* bring specified console to the front */
1404 if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1))
1405 set_console(vc->vc_par[1] - 1);
1406 break;
1407 case 13: /* unblank the screen */
1408 poke_blanked_console();
1409 break;
1410 case 14: /* set vesa powerdown interval */
1411 vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1412 break;
1413 case 15: /* activate the previous console */
1414 set_console(last_console);
1415 break;
1416 }
1417 }
1418
1419 /* console_sem is held */
1420 static void csi_at(struct vc_data *vc, unsigned int nr)
1421 {
1422 if (nr > vc->vc_cols - vc->vc_x)
1423 nr = vc->vc_cols - vc->vc_x;
1424 else if (!nr)
1425 nr = 1;
1426 insert_char(vc, nr);
1427 }
1428
1429 /* console_sem is held */
1430 static void csi_L(struct vc_data *vc, unsigned int nr)
1431 {
1432 if (nr > vc->vc_rows - vc->vc_y)
1433 nr = vc->vc_rows - vc->vc_y;
1434 else if (!nr)
1435 nr = 1;
1436 scrdown(vc, vc->vc_y, vc->vc_bottom, nr);
1437 vc->vc_need_wrap = 0;
1438 }
1439
1440 /* console_sem is held */
1441 static void csi_P(struct vc_data *vc, unsigned int nr)
1442 {
1443 if (nr > vc->vc_cols - vc->vc_x)
1444 nr = vc->vc_cols - vc->vc_x;
1445 else if (!nr)
1446 nr = 1;
1447 delete_char(vc, nr);
1448 }
1449
1450 /* console_sem is held */
1451 static void csi_M(struct vc_data *vc, unsigned int nr)
1452 {
1453 if (nr > vc->vc_rows - vc->vc_y)
1454 nr = vc->vc_rows - vc->vc_y;
1455 else if (!nr)
1456 nr=1;
1457 scrup(vc, vc->vc_y, vc->vc_bottom, nr);
1458 vc->vc_need_wrap = 0;
1459 }
1460
1461 /* console_sem is held (except via vc_init->reset_terminal */
1462 static void save_cur(struct vc_data *vc)
1463 {
1464 vc->vc_saved_x = vc->vc_x;
1465 vc->vc_saved_y = vc->vc_y;
1466 vc->vc_s_intensity = vc->vc_intensity;
1467 vc->vc_s_underline = vc->vc_underline;
1468 vc->vc_s_blink = vc->vc_blink;
1469 vc->vc_s_reverse = vc->vc_reverse;
1470 vc->vc_s_charset = vc->vc_charset;
1471 vc->vc_s_color = vc->vc_color;
1472 vc->vc_saved_G0 = vc->vc_G0_charset;
1473 vc->vc_saved_G1 = vc->vc_G1_charset;
1474 }
1475
1476 /* console_sem is held */
1477 static void restore_cur(struct vc_data *vc)
1478 {
1479 gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y);
1480 vc->vc_intensity = vc->vc_s_intensity;
1481 vc->vc_underline = vc->vc_s_underline;
1482 vc->vc_blink = vc->vc_s_blink;
1483 vc->vc_reverse = vc->vc_s_reverse;
1484 vc->vc_charset = vc->vc_s_charset;
1485 vc->vc_color = vc->vc_s_color;
1486 vc->vc_G0_charset = vc->vc_saved_G0;
1487 vc->vc_G1_charset = vc->vc_saved_G1;
1488 vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc);
1489 update_attr(vc);
1490 vc->vc_need_wrap = 0;
1491 }
1492
1493 enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey,
1494 EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd,
1495 ESpalette };
1496
1497 /* console_sem is held (except via vc_init()) */
1498 static void reset_terminal(struct vc_data *vc, int do_clear)
1499 {
1500 vc->vc_top = 0;
1501 vc->vc_bottom = vc->vc_rows;
1502 vc->vc_state = ESnormal;
1503 vc->vc_ques = 0;
1504 vc->vc_translate = set_translate(LAT1_MAP, vc);
1505 vc->vc_G0_charset = LAT1_MAP;
1506 vc->vc_G1_charset = GRAF_MAP;
1507 vc->vc_charset = 0;
1508 vc->vc_need_wrap = 0;
1509 vc->vc_report_mouse = 0;
1510 vc->vc_utf = 0;
1511 vc->vc_utf_count = 0;
1512
1513 vc->vc_disp_ctrl = 0;
1514 vc->vc_toggle_meta = 0;
1515
1516 vc->vc_decscnm = 0;
1517 vc->vc_decom = 0;
1518 vc->vc_decawm = 1;
1519 vc->vc_deccm = 1;
1520 vc->vc_decim = 0;
1521
1522 set_kbd(vc, decarm);
1523 clr_kbd(vc, decckm);
1524 clr_kbd(vc, kbdapplic);
1525 clr_kbd(vc, lnm);
1526 kbd_table[vc->vc_num].lockstate = 0;
1527 kbd_table[vc->vc_num].slockstate = 0;
1528 kbd_table[vc->vc_num].ledmode = LED_SHOW_FLAGS;
1529 kbd_table[vc->vc_num].ledflagstate = kbd_table[vc->vc_num].default_ledflagstate;
1530 /* do not do set_leds here because this causes an endless tasklet loop
1531 when the keyboard hasn't been initialized yet */
1532
1533 vc->vc_cursor_type = CUR_DEFAULT;
1534 vc->vc_complement_mask = vc->vc_s_complement_mask;
1535
1536 default_attr(vc);
1537 update_attr(vc);
1538
1539 vc->vc_tab_stop[0] = 0x01010100;
1540 vc->vc_tab_stop[1] =
1541 vc->vc_tab_stop[2] =
1542 vc->vc_tab_stop[3] =
1543 vc->vc_tab_stop[4] = 0x01010101;
1544
1545 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1546 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1547
1548 gotoxy(vc, 0, 0);
1549 save_cur(vc);
1550 if (do_clear)
1551 csi_J(vc, 2);
1552 }
1553
1554 /* console_sem is held */
1555 static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
1556 {
1557 /*
1558 * Control characters can be used in the _middle_
1559 * of an escape sequence.
1560 */
1561 switch (c) {
1562 case 0:
1563 return;
1564 case 7:
1565 if (vc->vc_bell_duration)
1566 kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration);
1567 return;
1568 case 8:
1569 bs(vc);
1570 return;
1571 case 9:
1572 vc->vc_pos -= (vc->vc_x << 1);
1573 while (vc->vc_x < vc->vc_cols - 1) {
1574 vc->vc_x++;
1575 if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31)))
1576 break;
1577 }
1578 vc->vc_pos += (vc->vc_x << 1);
1579 return;
1580 case 10: case 11: case 12:
1581 lf(vc);
1582 if (!is_kbd(vc, lnm))
1583 return;
1584 case 13:
1585 cr(vc);
1586 return;
1587 case 14:
1588 vc->vc_charset = 1;
1589 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1590 vc->vc_disp_ctrl = 1;
1591 return;
1592 case 15:
1593 vc->vc_charset = 0;
1594 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1595 vc->vc_disp_ctrl = 0;
1596 return;
1597 case 24: case 26:
1598 vc->vc_state = ESnormal;
1599 return;
1600 case 27:
1601 vc->vc_state = ESesc;
1602 return;
1603 case 127:
1604 del(vc);
1605 return;
1606 case 128+27:
1607 vc->vc_state = ESsquare;
1608 return;
1609 }
1610 switch(vc->vc_state) {
1611 case ESesc:
1612 vc->vc_state = ESnormal;
1613 switch (c) {
1614 case '[':
1615 vc->vc_state = ESsquare;
1616 return;
1617 case ']':
1618 vc->vc_state = ESnonstd;
1619 return;
1620 case '%':
1621 vc->vc_state = ESpercent;
1622 return;
1623 case 'E':
1624 cr(vc);
1625 lf(vc);
1626 return;
1627 case 'M':
1628 ri(vc);
1629 return;
1630 case 'D':
1631 lf(vc);
1632 return;
1633 case 'H':
1634 vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31));
1635 return;
1636 case 'Z':
1637 respond_ID(tty);
1638 return;
1639 case '7':
1640 save_cur(vc);
1641 return;
1642 case '8':
1643 restore_cur(vc);
1644 return;
1645 case '(':
1646 vc->vc_state = ESsetG0;
1647 return;
1648 case ')':
1649 vc->vc_state = ESsetG1;
1650 return;
1651 case '#':
1652 vc->vc_state = EShash;
1653 return;
1654 case 'c':
1655 reset_terminal(vc, 1);
1656 return;
1657 case '>': /* Numeric keypad */
1658 clr_kbd(vc, kbdapplic);
1659 return;
1660 case '=': /* Appl. keypad */
1661 set_kbd(vc, kbdapplic);
1662 return;
1663 }
1664 return;
1665 case ESnonstd:
1666 if (c=='P') { /* palette escape sequence */
1667 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1668 vc->vc_par[vc->vc_npar] = 0;
1669 vc->vc_npar = 0;
1670 vc->vc_state = ESpalette;
1671 return;
1672 } else if (c=='R') { /* reset palette */
1673 reset_palette(vc);
1674 vc->vc_state = ESnormal;
1675 } else
1676 vc->vc_state = ESnormal;
1677 return;
1678 case ESpalette:
1679 if ( (c>='0'&&c<='9') || (c>='A'&&c<='F') || (c>='a'&&c<='f') ) {
1680 vc->vc_par[vc->vc_npar++] = (c > '9' ? (c & 0xDF) - 'A' + 10 : c - '0');
1681 if (vc->vc_npar == 7) {
1682 int i = vc->vc_par[0] * 3, j = 1;
1683 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1684 vc->vc_palette[i++] += vc->vc_par[j++];
1685 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1686 vc->vc_palette[i++] += vc->vc_par[j++];
1687 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1688 vc->vc_palette[i] += vc->vc_par[j];
1689 set_palette(vc);
1690 vc->vc_state = ESnormal;
1691 }
1692 } else
1693 vc->vc_state = ESnormal;
1694 return;
1695 case ESsquare:
1696 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1697 vc->vc_par[vc->vc_npar] = 0;
1698 vc->vc_npar = 0;
1699 vc->vc_state = ESgetpars;
1700 if (c == '[') { /* Function key */
1701 vc->vc_state=ESfunckey;
1702 return;
1703 }
1704 vc->vc_ques = (c == '?');
1705 if (vc->vc_ques)
1706 return;
1707 case ESgetpars:
1708 if (c == ';' && vc->vc_npar < NPAR - 1) {
1709 vc->vc_npar++;
1710 return;
1711 } else if (c>='0' && c<='9') {
1712 vc->vc_par[vc->vc_npar] *= 10;
1713 vc->vc_par[vc->vc_npar] += c - '0';
1714 return;
1715 } else
1716 vc->vc_state = ESgotpars;
1717 case ESgotpars:
1718 vc->vc_state = ESnormal;
1719 switch(c) {
1720 case 'h':
1721 set_mode(vc, 1);
1722 return;
1723 case 'l':
1724 set_mode(vc, 0);
1725 return;
1726 case 'c':
1727 if (vc->vc_ques) {
1728 if (vc->vc_par[0])
1729 vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16);
1730 else
1731 vc->vc_cursor_type = CUR_DEFAULT;
1732 return;
1733 }
1734 break;
1735 case 'm':
1736 if (vc->vc_ques) {
1737 clear_selection();
1738 if (vc->vc_par[0])
1739 vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1];
1740 else
1741 vc->vc_complement_mask = vc->vc_s_complement_mask;
1742 return;
1743 }
1744 break;
1745 case 'n':
1746 if (!vc->vc_ques) {
1747 if (vc->vc_par[0] == 5)
1748 status_report(tty);
1749 else if (vc->vc_par[0] == 6)
1750 cursor_report(vc, tty);
1751 }
1752 return;
1753 }
1754 if (vc->vc_ques) {
1755 vc->vc_ques = 0;
1756 return;
1757 }
1758 switch(c) {
1759 case 'G': case '`':
1760 if (vc->vc_par[0])
1761 vc->vc_par[0]--;
1762 gotoxy(vc, vc->vc_par[0], vc->vc_y);
1763 return;
1764 case 'A':
1765 if (!vc->vc_par[0])
1766 vc->vc_par[0]++;
1767 gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]);
1768 return;
1769 case 'B': case 'e':
1770 if (!vc->vc_par[0])
1771 vc->vc_par[0]++;
1772 gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]);
1773 return;
1774 case 'C': case 'a':
1775 if (!vc->vc_par[0])
1776 vc->vc_par[0]++;
1777 gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y);
1778 return;
1779 case 'D':
1780 if (!vc->vc_par[0])
1781 vc->vc_par[0]++;
1782 gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y);
1783 return;
1784 case 'E':
1785 if (!vc->vc_par[0])
1786 vc->vc_par[0]++;
1787 gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]);
1788 return;
1789 case 'F':
1790 if (!vc->vc_par[0])
1791 vc->vc_par[0]++;
1792 gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]);
1793 return;
1794 case 'd':
1795 if (vc->vc_par[0])
1796 vc->vc_par[0]--;
1797 gotoxay(vc, vc->vc_x ,vc->vc_par[0]);
1798 return;
1799 case 'H': case 'f':
1800 if (vc->vc_par[0])
1801 vc->vc_par[0]--;
1802 if (vc->vc_par[1])
1803 vc->vc_par[1]--;
1804 gotoxay(vc, vc->vc_par[1], vc->vc_par[0]);
1805 return;
1806 case 'J':
1807 csi_J(vc, vc->vc_par[0]);
1808 return;
1809 case 'K':
1810 csi_K(vc, vc->vc_par[0]);
1811 return;
1812 case 'L':
1813 csi_L(vc, vc->vc_par[0]);
1814 return;
1815 case 'M':
1816 csi_M(vc, vc->vc_par[0]);
1817 return;
1818 case 'P':
1819 csi_P(vc, vc->vc_par[0]);
1820 return;
1821 case 'c':
1822 if (!vc->vc_par[0])
1823 respond_ID(tty);
1824 return;
1825 case 'g':
1826 if (!vc->vc_par[0])
1827 vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31));
1828 else if (vc->vc_par[0] == 3) {
1829 vc->vc_tab_stop[0] =
1830 vc->vc_tab_stop[1] =
1831 vc->vc_tab_stop[2] =
1832 vc->vc_tab_stop[3] =
1833 vc->vc_tab_stop[4] = 0;
1834 }
1835 return;
1836 case 'm':
1837 csi_m(vc);
1838 return;
1839 case 'q': /* DECLL - but only 3 leds */
1840 /* map 0,1,2,3 to 0,1,2,4 */
1841 if (vc->vc_par[0] < 4)
1842 setledstate(kbd_table + vc->vc_num,
1843 (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4);
1844 return;
1845 case 'r':
1846 if (!vc->vc_par[0])
1847 vc->vc_par[0]++;
1848 if (!vc->vc_par[1])
1849 vc->vc_par[1] = vc->vc_rows;
1850 /* Minimum allowed region is 2 lines */
1851 if (vc->vc_par[0] < vc->vc_par[1] &&
1852 vc->vc_par[1] <= vc->vc_rows) {
1853 vc->vc_top = vc->vc_par[0] - 1;
1854 vc->vc_bottom = vc->vc_par[1];
1855 gotoxay(vc, 0, 0);
1856 }
1857 return;
1858 case 's':
1859 save_cur(vc);
1860 return;
1861 case 'u':
1862 restore_cur(vc);
1863 return;
1864 case 'X':
1865 csi_X(vc, vc->vc_par[0]);
1866 return;
1867 case '@':
1868 csi_at(vc, vc->vc_par[0]);
1869 return;
1870 case ']': /* setterm functions */
1871 setterm_command(vc);
1872 return;
1873 }
1874 return;
1875 case ESpercent:
1876 vc->vc_state = ESnormal;
1877 switch (c) {
1878 case '@': /* defined in ISO 2022 */
1879 vc->vc_utf = 0;
1880 return;
1881 case 'G': /* prelim official escape code */
1882 case '8': /* retained for compatibility */
1883 vc->vc_utf = 1;
1884 return;
1885 }
1886 return;
1887 case ESfunckey:
1888 vc->vc_state = ESnormal;
1889 return;
1890 case EShash:
1891 vc->vc_state = ESnormal;
1892 if (c == '8') {
1893 /* DEC screen alignment test. kludge :-) */
1894 vc->vc_video_erase_char =
1895 (vc->vc_video_erase_char & 0xff00) | 'E';
1896 csi_J(vc, 2);
1897 vc->vc_video_erase_char =
1898 (vc->vc_video_erase_char & 0xff00) | ' ';
1899 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
1900 }
1901 return;
1902 case ESsetG0:
1903 if (c == '0')
1904 vc->vc_G0_charset = GRAF_MAP;
1905 else if (c == 'B')
1906 vc->vc_G0_charset = LAT1_MAP;
1907 else if (c == 'U')
1908 vc->vc_G0_charset = IBMPC_MAP;
1909 else if (c == 'K')
1910 vc->vc_G0_charset = USER_MAP;
1911 if (vc->vc_charset == 0)
1912 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1913 vc->vc_state = ESnormal;
1914 return;
1915 case ESsetG1:
1916 if (c == '0')
1917 vc->vc_G1_charset = GRAF_MAP;
1918 else if (c == 'B')
1919 vc->vc_G1_charset = LAT1_MAP;
1920 else if (c == 'U')
1921 vc->vc_G1_charset = IBMPC_MAP;
1922 else if (c == 'K')
1923 vc->vc_G1_charset = USER_MAP;
1924 if (vc->vc_charset == 1)
1925 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1926 vc->vc_state = ESnormal;
1927 return;
1928 default:
1929 vc->vc_state = ESnormal;
1930 }
1931 }
1932
1933 /* This is a temporary buffer used to prepare a tty console write
1934 * so that we can easily avoid touching user space while holding the
1935 * console spinlock. It is allocated in con_init and is shared by
1936 * this code and the vc_screen read/write tty calls.
1937 *
1938 * We have to allocate this statically in the kernel data section
1939 * since console_init (and thus con_init) are called before any
1940 * kernel memory allocation is available.
1941 */
1942 char con_buf[CON_BUF_SIZE];
1943 DECLARE_MUTEX(con_buf_sem);
1944
1945 /* acquires console_sem */
1946 static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count)
1947 {
1948 #ifdef VT_BUF_VRAM_ONLY
1949 #define FLUSH do { } while(0);
1950 #else
1951 #define FLUSH if (draw_x >= 0) { \
1952 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
1953 draw_x = -1; \
1954 }
1955 #endif
1956
1957 int c, tc, ok, n = 0, draw_x = -1;
1958 unsigned int currcons;
1959 unsigned long draw_from = 0, draw_to = 0;
1960 struct vc_data *vc;
1961 u16 himask, charmask;
1962 const unsigned char *orig_buf = NULL;
1963 int orig_count;
1964
1965 if (in_interrupt())
1966 return count;
1967
1968 might_sleep();
1969
1970 acquire_console_sem();
1971 vc = tty->driver_data;
1972 if (vc == NULL) {
1973 printk(KERN_ERR "vt: argh, driver_data is NULL !\n");
1974 release_console_sem();
1975 return 0;
1976 }
1977
1978 currcons = vc->vc_num;
1979 if (!vc_cons_allocated(currcons)) {
1980 /* could this happen? */
1981 static int error = 0;
1982 if (!error) {
1983 error = 1;
1984 printk("con_write: tty %d not allocated\n", currcons+1);
1985 }
1986 release_console_sem();
1987 return 0;
1988 }
1989 release_console_sem();
1990
1991 orig_buf = buf;
1992 orig_count = count;
1993
1994 /* At this point 'buf' is guaranteed to be a kernel buffer
1995 * and therefore no access to userspace (and therefore sleeping)
1996 * will be needed. The con_buf_sem serializes all tty based
1997 * console rendering and vcs write/read operations. We hold
1998 * the console spinlock during the entire write.
1999 */
2000
2001 acquire_console_sem();
2002
2003 vc = tty->driver_data;
2004 if (vc == NULL) {
2005 printk(KERN_ERR "vt: argh, driver_data _became_ NULL !\n");
2006 release_console_sem();
2007 goto out;
2008 }
2009
2010 himask = vc->vc_hi_font_mask;
2011 charmask = himask ? 0x1ff : 0xff;
2012
2013 /* undraw cursor first */
2014 if (IS_FG(vc))
2015 hide_cursor(vc);
2016
2017 while (!tty->stopped && count) {
2018 int orig = *buf;
2019 c = orig;
2020 buf++;
2021 n++;
2022 count--;
2023
2024 /* Do no translation at all in control states */
2025 if (vc->vc_state != ESnormal) {
2026 tc = c;
2027 } else if (vc->vc_utf && !vc->vc_disp_ctrl) {
2028 /* Combine UTF-8 into Unicode */
2029 /* Malformed sequences as sequences of replacement glyphs */
2030 rescan_last_byte:
2031 if(c > 0x7f) {
2032 if (vc->vc_utf_count) {
2033 if ((c & 0xc0) == 0x80) {
2034 vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f);
2035 if (--vc->vc_utf_count) {
2036 vc->vc_npar++;
2037 continue;
2038 }
2039 tc = c = vc->vc_utf_char;
2040 } else
2041 goto replacement_glyph;
2042 } else {
2043 vc->vc_npar = 0;
2044 if ((c & 0xe0) == 0xc0) {
2045 vc->vc_utf_count = 1;
2046 vc->vc_utf_char = (c & 0x1f);
2047 } else if ((c & 0xf0) == 0xe0) {
2048 vc->vc_utf_count = 2;
2049 vc->vc_utf_char = (c & 0x0f);
2050 } else if ((c & 0xf8) == 0xf0) {
2051 vc->vc_utf_count = 3;
2052 vc->vc_utf_char = (c & 0x07);
2053 } else if ((c & 0xfc) == 0xf8) {
2054 vc->vc_utf_count = 4;
2055 vc->vc_utf_char = (c & 0x03);
2056 } else if ((c & 0xfe) == 0xfc) {
2057 vc->vc_utf_count = 5;
2058 vc->vc_utf_char = (c & 0x01);
2059 } else
2060 goto replacement_glyph;
2061 continue;
2062 }
2063 } else {
2064 if (vc->vc_utf_count)
2065 goto replacement_glyph;
2066 tc = c;
2067 }
2068 } else { /* no utf or alternate charset mode */
2069 tc = vc->vc_translate[vc->vc_toggle_meta ? (c | 0x80) : c];
2070 }
2071
2072 /* If the original code was a control character we
2073 * only allow a glyph to be displayed if the code is
2074 * not normally used (such as for cursor movement) or
2075 * if the disp_ctrl mode has been explicitly enabled.
2076 * Certain characters (as given by the CTRL_ALWAYS
2077 * bitmap) are always displayed as control characters,
2078 * as the console would be pretty useless without
2079 * them; to display an arbitrary font position use the
2080 * direct-to-font zone in UTF-8 mode.
2081 */
2082 ok = tc && (c >= 32 ||
2083 !(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 :
2084 vc->vc_utf || ((CTRL_ACTION >> c) & 1)))
2085 && (c != 127 || vc->vc_disp_ctrl)
2086 && (c != 128+27);
2087
2088 if (vc->vc_state == ESnormal && ok) {
2089 /* Now try to find out how to display it */
2090 tc = conv_uni_to_pc(vc, tc);
2091 if (tc & ~charmask) {
2092 if ( tc == -4 ) {
2093 /* If we got -4 (not found) then see if we have
2094 defined a replacement character (U+FFFD) */
2095 replacement_glyph:
2096 tc = conv_uni_to_pc(vc, 0xfffd);
2097 if (!(tc & ~charmask))
2098 goto display_glyph;
2099 } else if ( tc != -3 )
2100 continue; /* nothing to display */
2101 /* no hash table or no replacement --
2102 * hope for the best */
2103 if ( c & ~charmask )
2104 tc = '?';
2105 else
2106 tc = c;
2107 }
2108
2109 display_glyph:
2110 if (vc->vc_need_wrap || vc->vc_decim)
2111 FLUSH
2112 if (vc->vc_need_wrap) {
2113 cr(vc);
2114 lf(vc);
2115 }
2116 if (vc->vc_decim)
2117 insert_char(vc, 1);
2118 scr_writew(himask ?
2119 ((vc->vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) :
2120 (vc->vc_attr << 8) + tc,
2121 (u16 *) vc->vc_pos);
2122 if (DO_UPDATE(vc) && draw_x < 0) {
2123 draw_x = vc->vc_x;
2124 draw_from = vc->vc_pos;
2125 }
2126 if (vc->vc_x == vc->vc_cols - 1) {
2127 vc->vc_need_wrap = vc->vc_decawm;
2128 draw_to = vc->vc_pos + 2;
2129 } else {
2130 vc->vc_x++;
2131 draw_to = (vc->vc_pos += 2);
2132 }
2133 if (vc->vc_utf_count) {
2134 if (vc->vc_npar) {
2135 vc->vc_npar--;
2136 goto display_glyph;
2137 }
2138 vc->vc_utf_count = 0;
2139 c = orig;
2140 goto rescan_last_byte;
2141 }
2142 continue;
2143 }
2144 FLUSH
2145 do_con_trol(tty, vc, orig);
2146 }
2147 FLUSH
2148 console_conditional_schedule();
2149 release_console_sem();
2150
2151 out:
2152 return n;
2153 #undef FLUSH
2154 }
2155
2156 /*
2157 * This is the console switching callback.
2158 *
2159 * Doing console switching in a process context allows
2160 * us to do the switches asynchronously (needed when we want
2161 * to switch due to a keyboard interrupt). Synchronization
2162 * with other console code and prevention of re-entrancy is
2163 * ensured with console_sem.
2164 */
2165 static void console_callback(void *ignored)
2166 {
2167 acquire_console_sem();
2168
2169 if (want_console >= 0) {
2170 if (want_console != fg_console &&
2171 vc_cons_allocated(want_console)) {
2172 hide_cursor(vc_cons[fg_console].d);
2173 change_console(vc_cons[want_console].d);
2174 /* we only changed when the console had already
2175 been allocated - a new console is not created
2176 in an interrupt routine */
2177 }
2178 want_console = -1;
2179 }
2180 if (do_poke_blanked_console) { /* do not unblank for a LED change */
2181 do_poke_blanked_console = 0;
2182 poke_blanked_console();
2183 }
2184 if (scrollback_delta) {
2185 struct vc_data *vc = vc_cons[fg_console].d;
2186 clear_selection();
2187 if (vc->vc_mode == KD_TEXT)
2188 vc->vc_sw->con_scrolldelta(vc, scrollback_delta);
2189 scrollback_delta = 0;
2190 }
2191 if (blank_timer_expired) {
2192 do_blank_screen(0);
2193 blank_timer_expired = 0;
2194 }
2195
2196 release_console_sem();
2197 }
2198
2199 void set_console(int nr)
2200 {
2201 want_console = nr;
2202 schedule_console_callback();
2203 }
2204
2205 struct tty_driver *console_driver;
2206
2207 #ifdef CONFIG_VT_CONSOLE
2208
2209 /*
2210 * Console on virtual terminal
2211 *
2212 * The console must be locked when we get here.
2213 */
2214
2215 static void vt_console_print(struct console *co, const char *b, unsigned count)
2216 {
2217 struct vc_data *vc = vc_cons[fg_console].d;
2218 unsigned char c;
2219 static unsigned long printing;
2220 const ushort *start;
2221 ushort cnt = 0;
2222 ushort myx;
2223
2224 /* console busy or not yet initialized */
2225 if (!printable || test_and_set_bit(0, &printing))
2226 return;
2227
2228 if (kmsg_redirect && vc_cons_allocated(kmsg_redirect - 1))
2229 vc = vc_cons[kmsg_redirect - 1].d;
2230
2231 /* read `x' only after setting currcons properly (otherwise
2232 the `x' macro will read the x of the foreground console). */
2233 myx = vc->vc_x;
2234
2235 if (!vc_cons_allocated(fg_console)) {
2236 /* impossible */
2237 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2238 goto quit;
2239 }
2240
2241 if (vc->vc_mode != KD_TEXT)
2242 goto quit;
2243
2244 /* undraw cursor first */
2245 if (IS_FG(vc))
2246 hide_cursor(vc);
2247
2248 start = (ushort *)vc->vc_pos;
2249
2250 /* Contrived structure to try to emulate original need_wrap behaviour
2251 * Problems caused when we have need_wrap set on '\n' character */
2252 while (count--) {
2253 c = *b++;
2254 if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) {
2255 if (cnt > 0) {
2256 if (CON_IS_VISIBLE(vc))
2257 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2258 vc->vc_x += cnt;
2259 if (vc->vc_need_wrap)
2260 vc->vc_x--;
2261 cnt = 0;
2262 }
2263 if (c == 8) { /* backspace */
2264 bs(vc);
2265 start = (ushort *)vc->vc_pos;
2266 myx = vc->vc_x;
2267 continue;
2268 }
2269 if (c != 13)
2270 lf(vc);
2271 cr(vc);
2272 start = (ushort *)vc->vc_pos;
2273 myx = vc->vc_x;
2274 if (c == 10 || c == 13)
2275 continue;
2276 }
2277 scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos);
2278 cnt++;
2279 if (myx == vc->vc_cols - 1) {
2280 vc->vc_need_wrap = 1;
2281 continue;
2282 }
2283 vc->vc_pos += 2;
2284 myx++;
2285 }
2286 if (cnt > 0) {
2287 if (CON_IS_VISIBLE(vc))
2288 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2289 vc->vc_x += cnt;
2290 if (vc->vc_x == vc->vc_cols) {
2291 vc->vc_x--;
2292 vc->vc_need_wrap = 1;
2293 }
2294 }
2295 set_cursor(vc);
2296
2297 quit:
2298 clear_bit(0, &printing);
2299 }
2300
2301 static struct tty_driver *vt_console_device(struct console *c, int *index)
2302 {
2303 *index = c->index ? c->index-1 : fg_console;
2304 return console_driver;
2305 }
2306
2307 static struct console vt_console_driver = {
2308 .name = "tty",
2309 .write = vt_console_print,
2310 .device = vt_console_device,
2311 .unblank = unblank_screen,
2312 .flags = CON_PRINTBUFFER,
2313 .index = -1,
2314 };
2315 #endif
2316
2317 /*
2318 * Handling of Linux-specific VC ioctls
2319 */
2320
2321 /*
2322 * Generally a bit racy with respect to console_sem().
2323 *
2324 * There are some functions which don't need it.
2325 *
2326 * There are some functions which can sleep for arbitrary periods
2327 * (paste_selection) but we don't need the lock there anyway.
2328 *
2329 * set_selection has locking, and definitely needs it
2330 */
2331
2332 int tioclinux(struct tty_struct *tty, unsigned long arg)
2333 {
2334 char type, data;
2335 char __user *p = (char __user *)arg;
2336 int lines;
2337 int ret;
2338
2339 if (tty->driver->type != TTY_DRIVER_TYPE_CONSOLE)
2340 return -EINVAL;
2341 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN))
2342 return -EPERM;
2343 if (get_user(type, p))
2344 return -EFAULT;
2345 ret = 0;
2346 switch (type)
2347 {
2348 case TIOCL_SETSEL:
2349 acquire_console_sem();
2350 ret = set_selection((struct tiocl_selection __user *)(p+1), tty);
2351 release_console_sem();
2352 break;
2353 case TIOCL_PASTESEL:
2354 ret = paste_selection(tty);
2355 break;
2356 case TIOCL_UNBLANKSCREEN:
2357 acquire_console_sem();
2358 unblank_screen();
2359 release_console_sem();
2360 break;
2361 case TIOCL_SELLOADLUT:
2362 ret = sel_loadlut(p);
2363 break;
2364 case TIOCL_GETSHIFTSTATE:
2365
2366 /*
2367 * Make it possible to react to Shift+Mousebutton.
2368 * Note that 'shift_state' is an undocumented
2369 * kernel-internal variable; programs not closely
2370 * related to the kernel should not use this.
2371 */
2372 data = shift_state;
2373 ret = __put_user(data, p);
2374 break;
2375 case TIOCL_GETMOUSEREPORTING:
2376 data = mouse_reporting();
2377 ret = __put_user(data, p);
2378 break;
2379 case TIOCL_SETVESABLANK:
2380 set_vesa_blanking(p);
2381 break;
2382 case TIOCL_GETKMSGREDIRECT:
2383 data = kmsg_redirect;
2384 ret = __put_user(data, p);
2385 break;
2386 case TIOCL_SETKMSGREDIRECT:
2387 if (!capable(CAP_SYS_ADMIN)) {
2388 ret = -EPERM;
2389 } else {
2390 if (get_user(data, p+1))
2391 ret = -EFAULT;
2392 else
2393 kmsg_redirect = data;
2394 }
2395 break;
2396 case TIOCL_GETFGCONSOLE:
2397 ret = fg_console;
2398 break;
2399 case TIOCL_SCROLLCONSOLE:
2400 if (get_user(lines, (s32 __user *)(p+4))) {
2401 ret = -EFAULT;
2402 } else {
2403 scrollfront(vc_cons[fg_console].d, lines);
2404 ret = 0;
2405 }
2406 break;
2407 case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
2408 acquire_console_sem();
2409 ignore_poke = 1;
2410 do_blank_screen(0);
2411 release_console_sem();
2412 break;
2413 case TIOCL_BLANKEDSCREEN:
2414 ret = console_blanked;
2415 break;
2416 default:
2417 ret = -EINVAL;
2418 break;
2419 }
2420 return ret;
2421 }
2422
2423 /*
2424 * /dev/ttyN handling
2425 */
2426
2427 static int con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2428 {
2429 int retval;
2430
2431 retval = do_con_write(tty, buf, count);
2432 con_flush_chars(tty);
2433
2434 return retval;
2435 }
2436
2437 static void con_put_char(struct tty_struct *tty, unsigned char ch)
2438 {
2439 if (in_interrupt())
2440 return; /* n_r3964 calls put_char() from interrupt context */
2441 do_con_write(tty, &ch, 1);
2442 }
2443
2444 static int con_write_room(struct tty_struct *tty)
2445 {
2446 if (tty->stopped)
2447 return 0;
2448 return 4096; /* No limit, really; we're not buffering */
2449 }
2450
2451 static int con_chars_in_buffer(struct tty_struct *tty)
2452 {
2453 return 0; /* we're not buffering */
2454 }
2455
2456 /*
2457 * con_throttle and con_unthrottle are only used for
2458 * paste_selection(), which has to stuff in a large number of
2459 * characters...
2460 */
2461 static void con_throttle(struct tty_struct *tty)
2462 {
2463 }
2464
2465 static void con_unthrottle(struct tty_struct *tty)
2466 {
2467 struct vc_data *vc = tty->driver_data;
2468
2469 wake_up_interruptible(&vc->paste_wait);
2470 }
2471
2472 /*
2473 * Turn the Scroll-Lock LED on when the tty is stopped
2474 */
2475 static void con_stop(struct tty_struct *tty)
2476 {
2477 int console_num;
2478 if (!tty)
2479 return;
2480 console_num = tty->index;
2481 if (!vc_cons_allocated(console_num))
2482 return;
2483 set_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2484 set_leds();
2485 }
2486
2487 /*
2488 * Turn the Scroll-Lock LED off when the console is started
2489 */
2490 static void con_start(struct tty_struct *tty)
2491 {
2492 int console_num;
2493 if (!tty)
2494 return;
2495 console_num = tty->index;
2496 if (!vc_cons_allocated(console_num))
2497 return;
2498 clr_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2499 set_leds();
2500 }
2501
2502 static void con_flush_chars(struct tty_struct *tty)
2503 {
2504 struct vc_data *vc;
2505
2506 if (in_interrupt()) /* from flush_to_ldisc */
2507 return;
2508
2509 /* if we race with con_close(), vt may be null */
2510 acquire_console_sem();
2511 vc = tty->driver_data;
2512 if (vc)
2513 set_cursor(vc);
2514 release_console_sem();
2515 }
2516
2517 /*
2518 * Allocate the console screen memory.
2519 */
2520 static int con_open(struct tty_struct *tty, struct file *filp)
2521 {
2522 unsigned int currcons = tty->index;
2523 int ret = 0;
2524
2525 acquire_console_sem();
2526 if (tty->driver_data == NULL) {
2527 ret = vc_allocate(currcons);
2528 if (ret == 0) {
2529 struct vc_data *vc = vc_cons[currcons].d;
2530 tty->driver_data = vc;
2531 vc->vc_tty = tty;
2532
2533 if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
2534 tty->winsize.ws_row = vc_cons[currcons].d->vc_rows;
2535 tty->winsize.ws_col = vc_cons[currcons].d->vc_cols;
2536 }
2537 release_console_sem();
2538 vcs_make_sysfs(tty);
2539 return ret;
2540 }
2541 }
2542 release_console_sem();
2543 return ret;
2544 }
2545
2546 /*
2547 * We take tty_mutex in here to prevent another thread from coming in via init_dev
2548 * and taking a ref against the tty while we're in the process of forgetting
2549 * about it and cleaning things up.
2550 *
2551 * This is because vcs_remove_sysfs() can sleep and will drop the BKL.
2552 */
2553 static void con_close(struct tty_struct *tty, struct file *filp)
2554 {
2555 mutex_lock(&tty_mutex);
2556 acquire_console_sem();
2557 if (tty && tty->count == 1) {
2558 struct vc_data *vc = tty->driver_data;
2559
2560 if (vc)
2561 vc->vc_tty = NULL;
2562 tty->driver_data = NULL;
2563 release_console_sem();
2564 vcs_remove_sysfs(tty);
2565 mutex_unlock(&tty_mutex);
2566 /*
2567 * tty_mutex is released, but we still hold BKL, so there is
2568 * still exclusion against init_dev()
2569 */
2570 return;
2571 }
2572 release_console_sem();
2573 mutex_unlock(&tty_mutex);
2574 }
2575
2576 static void vc_init(struct vc_data *vc, unsigned int rows,
2577 unsigned int cols, int do_clear)
2578 {
2579 int j, k ;
2580
2581 vc->vc_cols = cols;
2582 vc->vc_rows = rows;
2583 vc->vc_size_row = cols << 1;
2584 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
2585
2586 set_origin(vc);
2587 vc->vc_pos = vc->vc_origin;
2588 reset_vc(vc);
2589 for (j=k=0; j<16; j++) {
2590 vc->vc_palette[k++] = default_red[j] ;
2591 vc->vc_palette[k++] = default_grn[j] ;
2592 vc->vc_palette[k++] = default_blu[j] ;
2593 }
2594 vc->vc_def_color = 0x07; /* white */
2595 vc->vc_ulcolor = 0x0f; /* bold white */
2596 vc->vc_halfcolor = 0x08; /* grey */
2597 init_waitqueue_head(&vc->paste_wait);
2598 reset_terminal(vc, do_clear);
2599 }
2600
2601 /*
2602 * This routine initializes console interrupts, and does nothing
2603 * else. If you want the screen to clear, call tty_write with
2604 * the appropriate escape-sequence.
2605 */
2606
2607 static int __init con_init(void)
2608 {
2609 const char *display_desc = NULL;
2610 struct vc_data *vc;
2611 unsigned int currcons = 0, i;
2612
2613 acquire_console_sem();
2614
2615 if (conswitchp)
2616 display_desc = conswitchp->con_startup();
2617 if (!display_desc) {
2618 fg_console = 0;
2619 release_console_sem();
2620 return 0;
2621 }
2622
2623 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2624 struct con_driver *con_driver = &registered_con_driver[i];
2625
2626 if (con_driver->con == NULL) {
2627 con_driver->con = conswitchp;
2628 con_driver->desc = display_desc;
2629 con_driver->flag = CON_DRIVER_FLAG_INIT;
2630 con_driver->first = 0;
2631 con_driver->last = MAX_NR_CONSOLES - 1;
2632 break;
2633 }
2634 }
2635
2636 for (i = 0; i < MAX_NR_CONSOLES; i++)
2637 con_driver_map[i] = conswitchp;
2638
2639 init_timer(&console_timer);
2640 console_timer.function = blank_screen_t;
2641 if (blankinterval) {
2642 blank_state = blank_normal_wait;
2643 mod_timer(&console_timer, jiffies + blankinterval);
2644 }
2645
2646 /*
2647 * kmalloc is not running yet - we use the bootmem allocator.
2648 */
2649 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) {
2650 vc_cons[currcons].d = vc = alloc_bootmem(sizeof(struct vc_data));
2651 visual_init(vc, currcons, 1);
2652 vc->vc_screenbuf = (unsigned short *)alloc_bootmem(vc->vc_screenbuf_size);
2653 vc->vc_kmalloced = 0;
2654 vc_init(vc, vc->vc_rows, vc->vc_cols,
2655 currcons || !vc->vc_sw->con_save_screen);
2656 }
2657 currcons = fg_console = 0;
2658 master_display_fg = vc = vc_cons[currcons].d;
2659 set_origin(vc);
2660 save_screen(vc);
2661 gotoxy(vc, vc->vc_x, vc->vc_y);
2662 csi_J(vc, 0);
2663 update_screen(vc);
2664 printk("Console: %s %s %dx%d",
2665 vc->vc_can_do_color ? "colour" : "mono",
2666 display_desc, vc->vc_cols, vc->vc_rows);
2667 printable = 1;
2668 printk("\n");
2669
2670 release_console_sem();
2671
2672 #ifdef CONFIG_VT_CONSOLE
2673 register_console(&vt_console_driver);
2674 #endif
2675 return 0;
2676 }
2677 console_initcall(con_init);
2678
2679 static const struct tty_operations con_ops = {
2680 .open = con_open,
2681 .close = con_close,
2682 .write = con_write,
2683 .write_room = con_write_room,
2684 .put_char = con_put_char,
2685 .flush_chars = con_flush_chars,
2686 .chars_in_buffer = con_chars_in_buffer,
2687 .ioctl = vt_ioctl,
2688 .stop = con_stop,
2689 .start = con_start,
2690 .throttle = con_throttle,
2691 .unthrottle = con_unthrottle,
2692 };
2693
2694 int __init vty_init(void)
2695 {
2696 vcs_init();
2697
2698 console_driver = alloc_tty_driver(MAX_NR_CONSOLES);
2699 if (!console_driver)
2700 panic("Couldn't allocate console driver\n");
2701 console_driver->owner = THIS_MODULE;
2702 console_driver->name = "tty";
2703 console_driver->name_base = 1;
2704 console_driver->major = TTY_MAJOR;
2705 console_driver->minor_start = 1;
2706 console_driver->type = TTY_DRIVER_TYPE_CONSOLE;
2707 console_driver->init_termios = tty_std_termios;
2708 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS;
2709 tty_set_operations(console_driver, &con_ops);
2710 if (tty_register_driver(console_driver))
2711 panic("Couldn't register console driver\n");
2712
2713 kbd_init();
2714 console_map_init();
2715 #ifdef CONFIG_PROM_CONSOLE
2716 prom_con_init();
2717 #endif
2718 #ifdef CONFIG_MDA_CONSOLE
2719 mda_console_init();
2720 #endif
2721 return 0;
2722 }
2723
2724 #ifndef VT_SINGLE_DRIVER
2725 #include <linux/device.h>
2726
2727 static struct class *vtconsole_class;
2728
2729 static int bind_con_driver(const struct consw *csw, int first, int last,
2730 int deflt)
2731 {
2732 struct module *owner = csw->owner;
2733 const char *desc = NULL;
2734 struct con_driver *con_driver;
2735 int i, j = -1, k = -1, retval = -ENODEV;
2736
2737 if (!try_module_get(owner))
2738 return -ENODEV;
2739
2740 acquire_console_sem();
2741
2742 /* check if driver is registered */
2743 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2744 con_driver = &registered_con_driver[i];
2745
2746 if (con_driver->con == csw) {
2747 desc = con_driver->desc;
2748 retval = 0;
2749 break;
2750 }
2751 }
2752
2753 if (retval)
2754 goto err;
2755
2756 if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) {
2757 csw->con_startup();
2758 con_driver->flag |= CON_DRIVER_FLAG_INIT;
2759 }
2760
2761 if (deflt) {
2762 if (conswitchp)
2763 module_put(conswitchp->owner);
2764
2765 __module_get(owner);
2766 conswitchp = csw;
2767 }
2768
2769 first = max(first, con_driver->first);
2770 last = min(last, con_driver->last);
2771
2772 for (i = first; i <= last; i++) {
2773 int old_was_color;
2774 struct vc_data *vc = vc_cons[i].d;
2775
2776 if (con_driver_map[i])
2777 module_put(con_driver_map[i]->owner);
2778 __module_get(owner);
2779 con_driver_map[i] = csw;
2780
2781 if (!vc || !vc->vc_sw)
2782 continue;
2783
2784 j = i;
2785
2786 if (CON_IS_VISIBLE(vc)) {
2787 k = i;
2788 save_screen(vc);
2789 }
2790
2791 old_was_color = vc->vc_can_do_color;
2792 vc->vc_sw->con_deinit(vc);
2793 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
2794 visual_init(vc, i, 0);
2795 set_origin(vc);
2796 update_attr(vc);
2797
2798 /* If the console changed between mono <-> color, then
2799 * the attributes in the screenbuf will be wrong. The
2800 * following resets all attributes to something sane.
2801 */
2802 if (old_was_color != vc->vc_can_do_color)
2803 clear_buffer_attributes(vc);
2804 }
2805
2806 printk("Console: switching ");
2807 if (!deflt)
2808 printk("consoles %d-%d ", first+1, last+1);
2809 if (j >= 0) {
2810 struct vc_data *vc = vc_cons[j].d;
2811
2812 printk("to %s %s %dx%d\n",
2813 vc->vc_can_do_color ? "colour" : "mono",
2814 desc, vc->vc_cols, vc->vc_rows);
2815
2816 if (k >= 0) {
2817 vc = vc_cons[k].d;
2818 update_screen(vc);
2819 }
2820 } else
2821 printk("to %s\n", desc);
2822
2823 retval = 0;
2824 err:
2825 release_console_sem();
2826 module_put(owner);
2827 return retval;
2828 };
2829
2830 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
2831 static int con_is_graphics(const struct consw *csw, int first, int last)
2832 {
2833 int i, retval = 0;
2834
2835 for (i = first; i <= last; i++) {
2836 struct vc_data *vc = vc_cons[i].d;
2837
2838 if (vc && vc->vc_mode == KD_GRAPHICS) {
2839 retval = 1;
2840 break;
2841 }
2842 }
2843
2844 return retval;
2845 }
2846
2847 static int unbind_con_driver(const struct consw *csw, int first, int last,
2848 int deflt)
2849 {
2850 struct module *owner = csw->owner;
2851 const struct consw *defcsw = NULL;
2852 struct con_driver *con_driver = NULL, *con_back = NULL;
2853 int i, retval = -ENODEV;
2854
2855 if (!try_module_get(owner))
2856 return -ENODEV;
2857
2858 acquire_console_sem();
2859
2860 /* check if driver is registered and if it is unbindable */
2861 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2862 con_driver = &registered_con_driver[i];
2863
2864 if (con_driver->con == csw &&
2865 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
2866 retval = 0;
2867 break;
2868 }
2869 }
2870
2871 if (retval) {
2872 release_console_sem();
2873 goto err;
2874 }
2875
2876 retval = -ENODEV;
2877
2878 /* check if backup driver exists */
2879 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2880 con_back = &registered_con_driver[i];
2881
2882 if (con_back->con &&
2883 !(con_back->flag & CON_DRIVER_FLAG_MODULE)) {
2884 defcsw = con_back->con;
2885 retval = 0;
2886 break;
2887 }
2888 }
2889
2890 if (retval) {
2891 release_console_sem();
2892 goto err;
2893 }
2894
2895 if (!con_is_bound(csw)) {
2896 release_console_sem();
2897 goto err;
2898 }
2899
2900 first = max(first, con_driver->first);
2901 last = min(last, con_driver->last);
2902
2903 for (i = first; i <= last; i++) {
2904 if (con_driver_map[i] == csw) {
2905 module_put(csw->owner);
2906 con_driver_map[i] = NULL;
2907 }
2908 }
2909
2910 if (!con_is_bound(defcsw)) {
2911 const struct consw *defconsw = conswitchp;
2912
2913 defcsw->con_startup();
2914 con_back->flag |= CON_DRIVER_FLAG_INIT;
2915 /*
2916 * vgacon may change the default driver to point
2917 * to dummycon, we restore it here...
2918 */
2919 conswitchp = defconsw;
2920 }
2921
2922 if (!con_is_bound(csw))
2923 con_driver->flag &= ~CON_DRIVER_FLAG_INIT;
2924
2925 release_console_sem();
2926 /* ignore return value, binding should not fail */
2927 bind_con_driver(defcsw, first, last, deflt);
2928 err:
2929 module_put(owner);
2930 return retval;
2931
2932 }
2933
2934 static int vt_bind(struct con_driver *con)
2935 {
2936 const struct consw *defcsw = NULL, *csw = NULL;
2937 int i, more = 1, first = -1, last = -1, deflt = 0;
2938
2939 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
2940 con_is_graphics(con->con, con->first, con->last))
2941 goto err;
2942
2943 csw = con->con;
2944
2945 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2946 struct con_driver *con = &registered_con_driver[i];
2947
2948 if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) {
2949 defcsw = con->con;
2950 break;
2951 }
2952 }
2953
2954 if (!defcsw)
2955 goto err;
2956
2957 while (more) {
2958 more = 0;
2959
2960 for (i = con->first; i <= con->last; i++) {
2961 if (con_driver_map[i] == defcsw) {
2962 if (first == -1)
2963 first = i;
2964 last = i;
2965 more = 1;
2966 } else if (first != -1)
2967 break;
2968 }
2969
2970 if (first == 0 && last == MAX_NR_CONSOLES -1)
2971 deflt = 1;
2972
2973 if (first != -1)
2974 bind_con_driver(csw, first, last, deflt);
2975
2976 first = -1;
2977 last = -1;
2978 deflt = 0;
2979 }
2980
2981 err:
2982 return 0;
2983 }
2984
2985 static int vt_unbind(struct con_driver *con)
2986 {
2987 const struct consw *csw = NULL;
2988 int i, more = 1, first = -1, last = -1, deflt = 0;
2989
2990 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
2991 con_is_graphics(con->con, con->first, con->last))
2992 goto err;
2993
2994 csw = con->con;
2995
2996 while (more) {
2997 more = 0;
2998
2999 for (i = con->first; i <= con->last; i++) {
3000 if (con_driver_map[i] == csw) {
3001 if (first == -1)
3002 first = i;
3003 last = i;
3004 more = 1;
3005 } else if (first != -1)
3006 break;
3007 }
3008
3009 if (first == 0 && last == MAX_NR_CONSOLES -1)
3010 deflt = 1;
3011
3012 if (first != -1)
3013 unbind_con_driver(csw, first, last, deflt);
3014
3015 first = -1;
3016 last = -1;
3017 deflt = 0;
3018 }
3019
3020 err:
3021 return 0;
3022 }
3023 #else
3024 static inline int vt_bind(struct con_driver *con)
3025 {
3026 return 0;
3027 }
3028 static inline int vt_unbind(struct con_driver *con)
3029 {
3030 return 0;
3031 }
3032 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3033
3034 static ssize_t store_bind(struct class_device *class_device,
3035 const char *buf, size_t count)
3036 {
3037 struct con_driver *con = class_get_devdata(class_device);
3038 int bind = simple_strtoul(buf, NULL, 0);
3039
3040 if (bind)
3041 vt_bind(con);
3042 else
3043 vt_unbind(con);
3044
3045 return count;
3046 }
3047
3048 static ssize_t show_bind(struct class_device *class_device, char *buf)
3049 {
3050 struct con_driver *con = class_get_devdata(class_device);
3051 int bind = con_is_bound(con->con);
3052
3053 return snprintf(buf, PAGE_SIZE, "%i\n", bind);
3054 }
3055
3056 static ssize_t show_name(struct class_device *class_device, char *buf)
3057 {
3058 struct con_driver *con = class_get_devdata(class_device);
3059
3060 return snprintf(buf, PAGE_SIZE, "%s %s\n",
3061 (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)",
3062 con->desc);
3063
3064 }
3065
3066 static struct class_device_attribute class_device_attrs[] = {
3067 __ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind),
3068 __ATTR(name, S_IRUGO, show_name, NULL),
3069 };
3070
3071 static int vtconsole_init_class_device(struct con_driver *con)
3072 {
3073 int i;
3074 int error = 0;
3075
3076 con->flag |= CON_DRIVER_FLAG_ATTR;
3077 class_set_devdata(con->class_dev, con);
3078 for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++) {
3079 error = class_device_create_file(con->class_dev,
3080 &class_device_attrs[i]);
3081 if (error)
3082 break;
3083 }
3084
3085 if (error) {
3086 while (--i >= 0)
3087 class_device_remove_file(con->class_dev,
3088 &class_device_attrs[i]);
3089 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3090 }
3091
3092 return error;
3093 }
3094
3095 static void vtconsole_deinit_class_device(struct con_driver *con)
3096 {
3097 int i;
3098
3099 if (con->flag & CON_DRIVER_FLAG_ATTR) {
3100 for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++)
3101 class_device_remove_file(con->class_dev,
3102 &class_device_attrs[i]);
3103 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3104 }
3105 }
3106
3107 /**
3108 * con_is_bound - checks if driver is bound to the console
3109 * @csw: console driver
3110 *
3111 * RETURNS: zero if unbound, nonzero if bound
3112 *
3113 * Drivers can call this and if zero, they should release
3114 * all resources allocated on con_startup()
3115 */
3116 int con_is_bound(const struct consw *csw)
3117 {
3118 int i, bound = 0;
3119
3120 for (i = 0; i < MAX_NR_CONSOLES; i++) {
3121 if (con_driver_map[i] == csw) {
3122 bound = 1;
3123 break;
3124 }
3125 }
3126
3127 return bound;
3128 }
3129 EXPORT_SYMBOL(con_is_bound);
3130
3131 /**
3132 * register_con_driver - register console driver to console layer
3133 * @csw: console driver
3134 * @first: the first console to take over, minimum value is 0
3135 * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1
3136 *
3137 * DESCRIPTION: This function registers a console driver which can later
3138 * bind to a range of consoles specified by @first and @last. It will
3139 * also initialize the console driver by calling con_startup().
3140 */
3141 int register_con_driver(const struct consw *csw, int first, int last)
3142 {
3143 struct module *owner = csw->owner;
3144 struct con_driver *con_driver;
3145 const char *desc;
3146 int i, retval = 0;
3147
3148 if (!try_module_get(owner))
3149 return -ENODEV;
3150
3151 acquire_console_sem();
3152
3153 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3154 con_driver = &registered_con_driver[i];
3155
3156 /* already registered */
3157 if (con_driver->con == csw)
3158 retval = -EINVAL;
3159 }
3160
3161 if (retval)
3162 goto err;
3163
3164 desc = csw->con_startup();
3165
3166 if (!desc)
3167 goto err;
3168
3169 retval = -EINVAL;
3170
3171 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3172 con_driver = &registered_con_driver[i];
3173
3174 if (con_driver->con == NULL) {
3175 con_driver->con = csw;
3176 con_driver->desc = desc;
3177 con_driver->node = i;
3178 con_driver->flag = CON_DRIVER_FLAG_MODULE |
3179 CON_DRIVER_FLAG_INIT;
3180 con_driver->first = first;
3181 con_driver->last = last;
3182 retval = 0;
3183 break;
3184 }
3185 }
3186
3187 if (retval)
3188 goto err;
3189
3190 con_driver->class_dev = class_device_create(vtconsole_class, NULL,
3191 MKDEV(0, con_driver->node),
3192 NULL, "vtcon%i",
3193 con_driver->node);
3194
3195 if (IS_ERR(con_driver->class_dev)) {
3196 printk(KERN_WARNING "Unable to create class_device for %s; "
3197 "errno = %ld\n", con_driver->desc,
3198 PTR_ERR(con_driver->class_dev));
3199 con_driver->class_dev = NULL;
3200 } else {
3201 vtconsole_init_class_device(con_driver);
3202 }
3203
3204 err:
3205 release_console_sem();
3206 module_put(owner);
3207 return retval;
3208 }
3209 EXPORT_SYMBOL(register_con_driver);
3210
3211 /**
3212 * unregister_con_driver - unregister console driver from console layer
3213 * @csw: console driver
3214 *
3215 * DESCRIPTION: All drivers that registers to the console layer must
3216 * call this function upon exit, or if the console driver is in a state
3217 * where it won't be able to handle console services, such as the
3218 * framebuffer console without loaded framebuffer drivers.
3219 *
3220 * The driver must unbind first prior to unregistration.
3221 */
3222 int unregister_con_driver(const struct consw *csw)
3223 {
3224 int i, retval = -ENODEV;
3225
3226 acquire_console_sem();
3227
3228 /* cannot unregister a bound driver */
3229 if (con_is_bound(csw))
3230 goto err;
3231
3232 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3233 struct con_driver *con_driver = &registered_con_driver[i];
3234
3235 if (con_driver->con == csw &&
3236 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3237 vtconsole_deinit_class_device(con_driver);
3238 class_device_destroy(vtconsole_class,
3239 MKDEV(0, con_driver->node));
3240 con_driver->con = NULL;
3241 con_driver->desc = NULL;
3242 con_driver->class_dev = NULL;
3243 con_driver->node = 0;
3244 con_driver->flag = 0;
3245 con_driver->first = 0;
3246 con_driver->last = 0;
3247 retval = 0;
3248 break;
3249 }
3250 }
3251 err:
3252 release_console_sem();
3253 return retval;
3254 }
3255 EXPORT_SYMBOL(unregister_con_driver);
3256
3257 /*
3258 * If we support more console drivers, this function is used
3259 * when a driver wants to take over some existing consoles
3260 * and become default driver for newly opened ones.
3261 *
3262 * take_over_console is basically a register followed by unbind
3263 */
3264 int take_over_console(const struct consw *csw, int first, int last, int deflt)
3265 {
3266 int err;
3267
3268 err = register_con_driver(csw, first, last);
3269
3270 if (!err)
3271 bind_con_driver(csw, first, last, deflt);
3272
3273 return err;
3274 }
3275
3276 /*
3277 * give_up_console is a wrapper to unregister_con_driver. It will only
3278 * work if driver is fully unbound.
3279 */
3280 void give_up_console(const struct consw *csw)
3281 {
3282 unregister_con_driver(csw);
3283 }
3284
3285 static int __init vtconsole_class_init(void)
3286 {
3287 int i;
3288
3289 vtconsole_class = class_create(THIS_MODULE, "vtconsole");
3290 if (IS_ERR(vtconsole_class)) {
3291 printk(KERN_WARNING "Unable to create vt console class; "
3292 "errno = %ld\n", PTR_ERR(vtconsole_class));
3293 vtconsole_class = NULL;
3294 }
3295
3296 /* Add system drivers to sysfs */
3297 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3298 struct con_driver *con = &registered_con_driver[i];
3299
3300 if (con->con && !con->class_dev) {
3301 con->class_dev =
3302 class_device_create(vtconsole_class, NULL,
3303 MKDEV(0, con->node), NULL,
3304 "vtcon%i", con->node);
3305
3306 if (IS_ERR(con->class_dev)) {
3307 printk(KERN_WARNING "Unable to create "
3308 "class_device for %s; errno = %ld\n",
3309 con->desc, PTR_ERR(con->class_dev));
3310 con->class_dev = NULL;
3311 } else {
3312 vtconsole_init_class_device(con);
3313 }
3314 }
3315 }
3316
3317 return 0;
3318 }
3319 postcore_initcall(vtconsole_class_init);
3320
3321 #endif
3322
3323 /*
3324 * Screen blanking
3325 */
3326
3327 static void set_vesa_blanking(char __user *p)
3328 {
3329 unsigned int mode;
3330 get_user(mode, p + 1);
3331 vesa_blank_mode = (mode < 4) ? mode : 0;
3332 }
3333
3334 void do_blank_screen(int entering_gfx)
3335 {
3336 struct vc_data *vc = vc_cons[fg_console].d;
3337 int i;
3338
3339 WARN_CONSOLE_UNLOCKED();
3340
3341 if (console_blanked) {
3342 if (blank_state == blank_vesa_wait) {
3343 blank_state = blank_off;
3344 vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0);
3345 }
3346 return;
3347 }
3348 if (blank_state != blank_normal_wait)
3349 return;
3350 blank_state = blank_off;
3351
3352 /* entering graphics mode? */
3353 if (entering_gfx) {
3354 hide_cursor(vc);
3355 save_screen(vc);
3356 vc->vc_sw->con_blank(vc, -1, 1);
3357 console_blanked = fg_console + 1;
3358 set_origin(vc);
3359 return;
3360 }
3361
3362 /* don't blank graphics */
3363 if (vc->vc_mode != KD_TEXT) {
3364 console_blanked = fg_console + 1;
3365 return;
3366 }
3367
3368 hide_cursor(vc);
3369 del_timer_sync(&console_timer);
3370 blank_timer_expired = 0;
3371
3372 save_screen(vc);
3373 /* In case we need to reset origin, blanking hook returns 1 */
3374 i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0);
3375 console_blanked = fg_console + 1;
3376 if (i)
3377 set_origin(vc);
3378
3379 if (console_blank_hook && console_blank_hook(1))
3380 return;
3381
3382 if (vesa_off_interval && vesa_blank_mode) {
3383 blank_state = blank_vesa_wait;
3384 mod_timer(&console_timer, jiffies + vesa_off_interval);
3385 }
3386 }
3387 EXPORT_SYMBOL(do_blank_screen);
3388
3389 /*
3390 * Called by timer as well as from vt_console_driver
3391 */
3392 void do_unblank_screen(int leaving_gfx)
3393 {
3394 struct vc_data *vc;
3395
3396 /* This should now always be called from a "sane" (read: can schedule)
3397 * context for the sake of the low level drivers, except in the special
3398 * case of oops_in_progress
3399 */
3400 if (!oops_in_progress)
3401 might_sleep();
3402
3403 WARN_CONSOLE_UNLOCKED();
3404
3405 ignore_poke = 0;
3406 if (!console_blanked)
3407 return;
3408 if (!vc_cons_allocated(fg_console)) {
3409 /* impossible */
3410 printk("unblank_screen: tty %d not allocated ??\n", fg_console+1);
3411 return;
3412 }
3413 vc = vc_cons[fg_console].d;
3414 if (vc->vc_mode != KD_TEXT)
3415 return; /* but leave console_blanked != 0 */
3416
3417 if (blankinterval) {
3418 mod_timer(&console_timer, jiffies + blankinterval);
3419 blank_state = blank_normal_wait;
3420 }
3421
3422 console_blanked = 0;
3423 if (vc->vc_sw->con_blank(vc, 0, leaving_gfx))
3424 /* Low-level driver cannot restore -> do it ourselves */
3425 update_screen(vc);
3426 if (console_blank_hook)
3427 console_blank_hook(0);
3428 set_palette(vc);
3429 set_cursor(vc);
3430 }
3431 EXPORT_SYMBOL(do_unblank_screen);
3432
3433 /*
3434 * This is called by the outside world to cause a forced unblank, mostly for
3435 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
3436 * call it with 1 as an argument and so force a mode restore... that may kill
3437 * X or at least garbage the screen but would also make the Oops visible...
3438 */
3439 void unblank_screen(void)
3440 {
3441 do_unblank_screen(0);
3442 }
3443
3444 /*
3445 * We defer the timer blanking to work queue so it can take the console mutex
3446 * (console operations can still happen at irq time, but only from printk which
3447 * has the console mutex. Not perfect yet, but better than no locking
3448 */
3449 static void blank_screen_t(unsigned long dummy)
3450 {
3451 if (unlikely(!keventd_up())) {
3452 mod_timer(&console_timer, jiffies + blankinterval);
3453 return;
3454 }
3455 blank_timer_expired = 1;
3456 schedule_work(&console_work);
3457 }
3458
3459 void poke_blanked_console(void)
3460 {
3461 WARN_CONSOLE_UNLOCKED();
3462
3463 /* Add this so we quickly catch whoever might call us in a non
3464 * safe context. Nowadays, unblank_screen() isn't to be called in
3465 * atomic contexts and is allowed to schedule (with the special case
3466 * of oops_in_progress, but that isn't of any concern for this
3467 * function. --BenH.
3468 */
3469 might_sleep();
3470
3471 /* This isn't perfectly race free, but a race here would be mostly harmless,
3472 * at worse, we'll do a spurrious blank and it's unlikely
3473 */
3474 del_timer(&console_timer);
3475 blank_timer_expired = 0;
3476
3477 if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS)
3478 return;
3479 if (console_blanked)
3480 unblank_screen();
3481 else if (blankinterval) {
3482 mod_timer(&console_timer, jiffies + blankinterval);
3483 blank_state = blank_normal_wait;
3484 }
3485 }
3486
3487 /*
3488 * Palettes
3489 */
3490
3491 static void set_palette(struct vc_data *vc)
3492 {
3493 WARN_CONSOLE_UNLOCKED();
3494
3495 if (vc->vc_mode != KD_GRAPHICS)
3496 vc->vc_sw->con_set_palette(vc, color_table);
3497 }
3498
3499 static int set_get_cmap(unsigned char __user *arg, int set)
3500 {
3501 int i, j, k;
3502
3503 WARN_CONSOLE_UNLOCKED();
3504
3505 for (i = 0; i < 16; i++)
3506 if (set) {
3507 get_user(default_red[i], arg++);
3508 get_user(default_grn[i], arg++);
3509 get_user(default_blu[i], arg++);
3510 } else {
3511 put_user(default_red[i], arg++);
3512 put_user(default_grn[i], arg++);
3513 put_user(default_blu[i], arg++);
3514 }
3515 if (set) {
3516 for (i = 0; i < MAX_NR_CONSOLES; i++)
3517 if (vc_cons_allocated(i)) {
3518 for (j = k = 0; j < 16; j++) {
3519 vc_cons[i].d->vc_palette[k++] = default_red[j];
3520 vc_cons[i].d->vc_palette[k++] = default_grn[j];
3521 vc_cons[i].d->vc_palette[k++] = default_blu[j];
3522 }
3523 set_palette(vc_cons[i].d);
3524 }
3525 }
3526 return 0;
3527 }
3528
3529 /*
3530 * Load palette into the DAC registers. arg points to a colour
3531 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
3532 */
3533
3534 int con_set_cmap(unsigned char __user *arg)
3535 {
3536 int rc;
3537
3538 acquire_console_sem();
3539 rc = set_get_cmap (arg,1);
3540 release_console_sem();
3541
3542 return rc;
3543 }
3544
3545 int con_get_cmap(unsigned char __user *arg)
3546 {
3547 int rc;
3548
3549 acquire_console_sem();
3550 rc = set_get_cmap (arg,0);
3551 release_console_sem();
3552
3553 return rc;
3554 }
3555
3556 void reset_palette(struct vc_data *vc)
3557 {
3558 int j, k;
3559 for (j=k=0; j<16; j++) {
3560 vc->vc_palette[k++] = default_red[j];
3561 vc->vc_palette[k++] = default_grn[j];
3562 vc->vc_palette[k++] = default_blu[j];
3563 }
3564 set_palette(vc);
3565 }
3566
3567 /*
3568 * Font switching
3569 *
3570 * Currently we only support fonts up to 32 pixels wide, at a maximum height
3571 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
3572 * depending on width) reserved for each character which is kinda wasty, but
3573 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
3574 * is upto the actual low-level console-driver convert data into its favorite
3575 * format (maybe we should add a `fontoffset' field to the `display'
3576 * structure so we won't have to convert the fontdata all the time.
3577 * /Jes
3578 */
3579
3580 #define max_font_size 65536
3581
3582 static int con_font_get(struct vc_data *vc, struct console_font_op *op)
3583 {
3584 struct console_font font;
3585 int rc = -EINVAL;
3586 int c;
3587
3588 if (vc->vc_mode != KD_TEXT)
3589 return -EINVAL;
3590
3591 if (op->data) {
3592 font.data = kmalloc(max_font_size, GFP_KERNEL);
3593 if (!font.data)
3594 return -ENOMEM;
3595 } else
3596 font.data = NULL;
3597
3598 acquire_console_sem();
3599 if (vc->vc_sw->con_font_get)
3600 rc = vc->vc_sw->con_font_get(vc, &font);
3601 else
3602 rc = -ENOSYS;
3603 release_console_sem();
3604
3605 if (rc)
3606 goto out;
3607
3608 c = (font.width+7)/8 * 32 * font.charcount;
3609
3610 if (op->data && font.charcount > op->charcount)
3611 rc = -ENOSPC;
3612 if (!(op->flags & KD_FONT_FLAG_OLD)) {
3613 if (font.width > op->width || font.height > op->height)
3614 rc = -ENOSPC;
3615 } else {
3616 if (font.width != 8)
3617 rc = -EIO;
3618 else if ((op->height && font.height > op->height) ||
3619 font.height > 32)
3620 rc = -ENOSPC;
3621 }
3622 if (rc)
3623 goto out;
3624
3625 op->height = font.height;
3626 op->width = font.width;
3627 op->charcount = font.charcount;
3628
3629 if (op->data && copy_to_user(op->data, font.data, c))
3630 rc = -EFAULT;
3631
3632 out:
3633 kfree(font.data);
3634 return rc;
3635 }
3636
3637 static int con_font_set(struct vc_data *vc, struct console_font_op *op)
3638 {
3639 struct console_font font;
3640 int rc = -EINVAL;
3641 int size;
3642
3643 if (vc->vc_mode != KD_TEXT)
3644 return -EINVAL;
3645 if (!op->data)
3646 return -EINVAL;
3647 if (op->charcount > 512)
3648 return -EINVAL;
3649 if (!op->height) { /* Need to guess font height [compat] */
3650 int h, i;
3651 u8 __user *charmap = op->data;
3652 u8 tmp;
3653
3654 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
3655 so that we can get rid of this soon */
3656 if (!(op->flags & KD_FONT_FLAG_OLD))
3657 return -EINVAL;
3658 for (h = 32; h > 0; h--)
3659 for (i = 0; i < op->charcount; i++) {
3660 if (get_user(tmp, &charmap[32*i+h-1]))
3661 return -EFAULT;
3662 if (tmp)
3663 goto nonzero;
3664 }
3665 return -EINVAL;
3666 nonzero:
3667 op->height = h;
3668 }
3669 if (op->width <= 0 || op->width > 32 || op->height > 32)
3670 return -EINVAL;
3671 size = (op->width+7)/8 * 32 * op->charcount;
3672 if (size > max_font_size)
3673 return -ENOSPC;
3674 font.charcount = op->charcount;
3675 font.height = op->height;
3676 font.width = op->width;
3677 font.data = kmalloc(size, GFP_KERNEL);
3678 if (!font.data)
3679 return -ENOMEM;
3680 if (copy_from_user(font.data, op->data, size)) {
3681 kfree(font.data);
3682 return -EFAULT;
3683 }
3684 acquire_console_sem();
3685 if (vc->vc_sw->con_font_set)
3686 rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
3687 else
3688 rc = -ENOSYS;
3689 release_console_sem();
3690 kfree(font.data);
3691 return rc;
3692 }
3693
3694 static int con_font_default(struct vc_data *vc, struct console_font_op *op)
3695 {
3696 struct console_font font = {.width = op->width, .height = op->height};
3697 char name[MAX_FONT_NAME];
3698 char *s = name;
3699 int rc;
3700
3701 if (vc->vc_mode != KD_TEXT)
3702 return -EINVAL;
3703
3704 if (!op->data)
3705 s = NULL;
3706 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0)
3707 return -EFAULT;
3708 else
3709 name[MAX_FONT_NAME - 1] = 0;
3710
3711 acquire_console_sem();
3712 if (vc->vc_sw->con_font_default)
3713 rc = vc->vc_sw->con_font_default(vc, &font, s);
3714 else
3715 rc = -ENOSYS;
3716 release_console_sem();
3717 if (!rc) {
3718 op->width = font.width;
3719 op->height = font.height;
3720 }
3721 return rc;
3722 }
3723
3724 static int con_font_copy(struct vc_data *vc, struct console_font_op *op)
3725 {
3726 int con = op->height;
3727 int rc;
3728
3729 if (vc->vc_mode != KD_TEXT)
3730 return -EINVAL;
3731
3732 acquire_console_sem();
3733 if (!vc->vc_sw->con_font_copy)
3734 rc = -ENOSYS;
3735 else if (con < 0 || !vc_cons_allocated(con))
3736 rc = -ENOTTY;
3737 else if (con == vc->vc_num) /* nothing to do */
3738 rc = 0;
3739 else
3740 rc = vc->vc_sw->con_font_copy(vc, con);
3741 release_console_sem();
3742 return rc;
3743 }
3744
3745 int con_font_op(struct vc_data *vc, struct console_font_op *op)
3746 {
3747 switch (op->op) {
3748 case KD_FONT_OP_SET:
3749 return con_font_set(vc, op);
3750 case KD_FONT_OP_GET:
3751 return con_font_get(vc, op);
3752 case KD_FONT_OP_SET_DEFAULT:
3753 return con_font_default(vc, op);
3754 case KD_FONT_OP_COPY:
3755 return con_font_copy(vc, op);
3756 }
3757 return -ENOSYS;
3758 }
3759
3760 /*
3761 * Interface exported to selection and vcs.
3762 */
3763
3764 /* used by selection */
3765 u16 screen_glyph(struct vc_data *vc, int offset)
3766 {
3767 u16 w = scr_readw(screenpos(vc, offset, 1));
3768 u16 c = w & 0xff;
3769
3770 if (w & vc->vc_hi_font_mask)
3771 c |= 0x100;
3772 return c;
3773 }
3774
3775 /* used by vcs - note the word offset */
3776 unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed)
3777 {
3778 return screenpos(vc, 2 * w_offset, viewed);
3779 }
3780
3781 void getconsxy(struct vc_data *vc, unsigned char *p)
3782 {
3783 p[0] = vc->vc_x;
3784 p[1] = vc->vc_y;
3785 }
3786
3787 void putconsxy(struct vc_data *vc, unsigned char *p)
3788 {
3789 hide_cursor(vc);
3790 gotoxy(vc, p[0], p[1]);
3791 set_cursor(vc);
3792 }
3793
3794 u16 vcs_scr_readw(struct vc_data *vc, const u16 *org)
3795 {
3796 if ((unsigned long)org == vc->vc_pos && softcursor_original != -1)
3797 return softcursor_original;
3798 return scr_readw(org);
3799 }
3800
3801 void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org)
3802 {
3803 scr_writew(val, org);
3804 if ((unsigned long)org == vc->vc_pos) {
3805 softcursor_original = -1;
3806 add_softcursor(vc);
3807 }
3808 }
3809
3810 /*
3811 * Visible symbols for modules
3812 */
3813
3814 EXPORT_SYMBOL(color_table);
3815 EXPORT_SYMBOL(default_red);
3816 EXPORT_SYMBOL(default_grn);
3817 EXPORT_SYMBOL(default_blu);
3818 EXPORT_SYMBOL(update_region);
3819 EXPORT_SYMBOL(redraw_screen);
3820 EXPORT_SYMBOL(vc_resize);
3821 EXPORT_SYMBOL(vc_lock_resize);
3822 EXPORT_SYMBOL(fg_console);
3823 EXPORT_SYMBOL(console_blank_hook);
3824 EXPORT_SYMBOL(console_blanked);
3825 EXPORT_SYMBOL(vc_cons);
3826 #ifndef VT_SINGLE_DRIVER
3827 EXPORT_SYMBOL(take_over_console);
3828 EXPORT_SYMBOL(give_up_console);
3829 #endif
Linux kernel - Deliverables
This page took 0.108786 seconds and 6 git commands to generate.