?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
[MTD] [NAND] pxa3xx_nand: allow to define flash types in the platform data
[linux-2.6/linux-2.6-openrd.git] / drivers / char / vt.c
blob60359c360912c7d4dddee8e76a6a4ffb2c576e7e
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/mutex.h>
90 #include <linux/vt_kern.h>
91 #include <linux/selection.h>
92 #include <linux/tiocl.h>
93 #include <linux/kbd_kern.h>
94 #include <linux/consolemap.h>
95 #include <linux/timer.h>
96 #include <linux/interrupt.h>
97 #include <linux/workqueue.h>
98 #include <linux/bootmem.h>
99 #include <linux/pm.h>
100 #include <linux/font.h>
101 #include <linux/bitops.h>
102 #include <linux/notifier.h>
103
104 #include <asm/io.h>
105 #include <asm/system.h>
106 #include <asm/uaccess.h>
107
108 #define MAX_NR_CON_DRIVER 16
109
110 #define CON_DRIVER_FLAG_MODULE 1
111 #define CON_DRIVER_FLAG_INIT 2
112 #define CON_DRIVER_FLAG_ATTR 4
113
114 struct con_driver {
115 const struct consw *con;
116 const char *desc;
117 struct device *dev;
118 int node;
119 int first;
120 int last;
121 int flag;
122 };
123
124 static struct con_driver registered_con_driver[MAX_NR_CON_DRIVER];
125 const struct consw *conswitchp;
126
127 /* A bitmap for codes <32. A bit of 1 indicates that the code
128 * corresponding to that bit number invokes some special action
129 * (such as cursor movement) and should not be displayed as a
130 * glyph unless the disp_ctrl mode is explicitly enabled.
131 */
132 #define CTRL_ACTION 0x0d00ff81
133 #define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */
134
135 /*
136 * Here is the default bell parameters: 750HZ, 1/8th of a second
137 */
138 #define DEFAULT_BELL_PITCH 750
139 #define DEFAULT_BELL_DURATION (HZ/8)
140
141 struct vc vc_cons [MAX_NR_CONSOLES];
142
143 #ifndef VT_SINGLE_DRIVER
144 static const struct consw *con_driver_map[MAX_NR_CONSOLES];
145 #endif
146
147 static int con_open(struct tty_struct *, struct file *);
148 static void vc_init(struct vc_data *vc, unsigned int rows,
149 unsigned int cols, int do_clear);
150 static void gotoxy(struct vc_data *vc, int new_x, int new_y);
151 static void save_cur(struct vc_data *vc);
152 static void reset_terminal(struct vc_data *vc, int do_clear);
153 static void con_flush_chars(struct tty_struct *tty);
154 static int set_vesa_blanking(char __user *p);
155 static void set_cursor(struct vc_data *vc);
156 static void hide_cursor(struct vc_data *vc);
157 static void console_callback(struct work_struct *ignored);
158 static void blank_screen_t(unsigned long dummy);
159 static void set_palette(struct vc_data *vc);
160
161 static int printable; /* Is console ready for printing? */
162 int default_utf8 = true;
163 module_param(default_utf8, int, S_IRUGO | S_IWUSR);
164
165 /*
166 * ignore_poke: don't unblank the screen when things are typed. This is
167 * mainly for the privacy of braille terminal users.
168 */
169 static int ignore_poke;
170
171 int do_poke_blanked_console;
172 int console_blanked;
173
174 static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
175 static int blankinterval = 10*60*HZ;
176 static int vesa_off_interval;
177
178 static DECLARE_WORK(console_work, console_callback);
179
180 /*
181 * fg_console is the current virtual console,
182 * last_console is the last used one,
183 * want_console is the console we want to switch to,
184 * kmsg_redirect is the console for kernel messages,
185 */
186 int fg_console;
187 int last_console;
188 int want_console = -1;
189 int kmsg_redirect;
190
191 /*
192 * For each existing display, we have a pointer to console currently visible
193 * on that display, allowing consoles other than fg_console to be refreshed
194 * appropriately. Unless the low-level driver supplies its own display_fg
195 * variable, we use this one for the "master display".
196 */
197 static struct vc_data *master_display_fg;
198
199 /*
200 * Unfortunately, we need to delay tty echo when we're currently writing to the
201 * console since the code is (and always was) not re-entrant, so we schedule
202 * all flip requests to process context with schedule-task() and run it from
203 * console_callback().
204 */
205
206 /*
207 * For the same reason, we defer scrollback to the console callback.
208 */
209 static int scrollback_delta;
210
211 /*
212 * Hook so that the power management routines can (un)blank
213 * the console on our behalf.
214 */
215 int (*console_blank_hook)(int);
216
217 static DEFINE_TIMER(console_timer, blank_screen_t, 0, 0);
218 static int blank_state;
219 static int blank_timer_expired;
220 enum {
221 blank_off = 0,
222 blank_normal_wait,
223 blank_vesa_wait,
224 };
225
226 /*
227 * Notifier list for console events.
228 */
229 static ATOMIC_NOTIFIER_HEAD(vt_notifier_list);
230
231 int register_vt_notifier(struct notifier_block *nb)
232 {
233 return atomic_notifier_chain_register(&vt_notifier_list, nb);
234 }
235 EXPORT_SYMBOL_GPL(register_vt_notifier);
236
237 int unregister_vt_notifier(struct notifier_block *nb)
238 {
239 return atomic_notifier_chain_unregister(&vt_notifier_list, nb);
240 }
241 EXPORT_SYMBOL_GPL(unregister_vt_notifier);
242
243 static void notify_write(struct vc_data *vc, unsigned int unicode)
244 {
245 struct vt_notifier_param param = { .vc = vc, unicode = unicode };
246 atomic_notifier_call_chain(&vt_notifier_list, VT_WRITE, &param);
247 }
248
249 static void notify_update(struct vc_data *vc)
250 {
251 struct vt_notifier_param param = { .vc = vc };
252 atomic_notifier_call_chain(&vt_notifier_list, VT_UPDATE, &param);
253 }
254
255 /*
256 * Low-Level Functions
257 */
258
259 #define IS_FG(vc) ((vc)->vc_num == fg_console)
260
261 #ifdef VT_BUF_VRAM_ONLY
262 #define DO_UPDATE(vc) 0
263 #else
264 #define DO_UPDATE(vc) (CON_IS_VISIBLE(vc) && !console_blanked)
265 #endif
266
267 static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed)
268 {
269 unsigned short *p;
270
271 if (!viewed)
272 p = (unsigned short *)(vc->vc_origin + offset);
273 else if (!vc->vc_sw->con_screen_pos)
274 p = (unsigned short *)(vc->vc_visible_origin + offset);
275 else
276 p = vc->vc_sw->con_screen_pos(vc, offset);
277 return p;
278 }
279
280 static inline void scrolldelta(int lines)
281 {
282 scrollback_delta += lines;
283 schedule_console_callback();
284 }
285
286 void schedule_console_callback(void)
287 {
288 schedule_work(&console_work);
289 }
290
291 static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
292 {
293 unsigned short *d, *s;
294
295 if (t+nr >= b)
296 nr = b - t - 1;
297 if (b > vc->vc_rows || t >= b || nr < 1)
298 return;
299 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr))
300 return;
301 d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
302 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr));
303 scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row);
304 scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_scrl_erase_char,
305 vc->vc_size_row * nr);
306 }
307
308 static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
309 {
310 unsigned short *s;
311 unsigned int step;
312
313 if (t+nr >= b)
314 nr = b - t - 1;
315 if (b > vc->vc_rows || t >= b || nr < 1)
316 return;
317 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr))
318 return;
319 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
320 step = vc->vc_cols * nr;
321 scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row);
322 scr_memsetw(s, vc->vc_scrl_erase_char, 2 * step);
323 }
324
325 static void do_update_region(struct vc_data *vc, unsigned long start, int count)
326 {
327 #ifndef VT_BUF_VRAM_ONLY
328 unsigned int xx, yy, offset;
329 u16 *p;
330
331 p = (u16 *) start;
332 if (!vc->vc_sw->con_getxy) {
333 offset = (start - vc->vc_origin) / 2;
334 xx = offset % vc->vc_cols;
335 yy = offset / vc->vc_cols;
336 } else {
337 int nxx, nyy;
338 start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy);
339 xx = nxx; yy = nyy;
340 }
341 for(;;) {
342 u16 attrib = scr_readw(p) & 0xff00;
343 int startx = xx;
344 u16 *q = p;
345 while (xx < vc->vc_cols && count) {
346 if (attrib != (scr_readw(p) & 0xff00)) {
347 if (p > q)
348 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
349 startx = xx;
350 q = p;
351 attrib = scr_readw(p) & 0xff00;
352 }
353 p++;
354 xx++;
355 count--;
356 }
357 if (p > q)
358 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
359 if (!count)
360 break;
361 xx = 0;
362 yy++;
363 if (vc->vc_sw->con_getxy) {
364 p = (u16 *)start;
365 start = vc->vc_sw->con_getxy(vc, start, NULL, NULL);
366 }
367 }
368 #endif
369 }
370
371 void update_region(struct vc_data *vc, unsigned long start, int count)
372 {
373 WARN_CONSOLE_UNLOCKED();
374
375 if (DO_UPDATE(vc)) {
376 hide_cursor(vc);
377 do_update_region(vc, start, count);
378 set_cursor(vc);
379 }
380 }
381
382 /* Structure of attributes is hardware-dependent */
383
384 static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink,
385 u8 _underline, u8 _reverse, u8 _italic)
386 {
387 if (vc->vc_sw->con_build_attr)
388 return vc->vc_sw->con_build_attr(vc, _color, _intensity,
389 _blink, _underline, _reverse, _italic);
390
391 #ifndef VT_BUF_VRAM_ONLY
392 /*
393 * ++roman: I completely changed the attribute format for monochrome
394 * mode (!can_do_color). The formerly used MDA (monochrome display
395 * adapter) format didn't allow the combination of certain effects.
396 * Now the attribute is just a bit vector:
397 * Bit 0..1: intensity (0..2)
398 * Bit 2 : underline
399 * Bit 3 : reverse
400 * Bit 7 : blink
401 */
402 {
403 u8 a = _color;
404 if (!vc->vc_can_do_color)
405 return _intensity |
406 (_italic ? 2 : 0) |
407 (_underline ? 4 : 0) |
408 (_reverse ? 8 : 0) |
409 (_blink ? 0x80 : 0);
410 if (_italic)
411 a = (a & 0xF0) | vc->vc_itcolor;
412 else if (_underline)
413 a = (a & 0xf0) | vc->vc_ulcolor;
414 else if (_intensity == 0)
415 a = (a & 0xf0) | vc->vc_ulcolor;
416 if (_reverse)
417 a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77);
418 if (_blink)
419 a ^= 0x80;
420 if (_intensity == 2)
421 a ^= 0x08;
422 if (vc->vc_hi_font_mask == 0x100)
423 a <<= 1;
424 return a;
425 }
426 #else
427 return 0;
428 #endif
429 }
430
431 static void update_attr(struct vc_data *vc)
432 {
433 vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity,
434 vc->vc_blink, vc->vc_underline,
435 vc->vc_reverse ^ vc->vc_decscnm, vc->vc_italic);
436 vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm, 0) << 8) | ' ';
437 vc->vc_scrl_erase_char = (build_attr(vc, vc->vc_def_color, 1, false, false, vc->vc_decscnm, false) << 8) | ' ';
438 }
439
440 /* Note: inverting the screen twice should revert to the original state */
441 void invert_screen(struct vc_data *vc, int offset, int count, int viewed)
442 {
443 unsigned short *p;
444
445 WARN_CONSOLE_UNLOCKED();
446
447 count /= 2;
448 p = screenpos(vc, offset, viewed);
449 if (vc->vc_sw->con_invert_region)
450 vc->vc_sw->con_invert_region(vc, p, count);
451 #ifndef VT_BUF_VRAM_ONLY
452 else {
453 u16 *q = p;
454 int cnt = count;
455 u16 a;
456
457 if (!vc->vc_can_do_color) {
458 while (cnt--) {
459 a = scr_readw(q);
460 a ^= 0x0800;
461 scr_writew(a, q);
462 q++;
463 }
464 } else if (vc->vc_hi_font_mask == 0x100) {
465 while (cnt--) {
466 a = scr_readw(q);
467 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4);
468 scr_writew(a, q);
469 q++;
470 }
471 } else {
472 while (cnt--) {
473 a = scr_readw(q);
474 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4);
475 scr_writew(a, q);
476 q++;
477 }
478 }
479 }
480 #endif
481 if (DO_UPDATE(vc))
482 do_update_region(vc, (unsigned long) p, count);
483 }
484
485 /* used by selection: complement pointer position */
486 void complement_pos(struct vc_data *vc, int offset)
487 {
488 static int old_offset = -1;
489 static unsigned short old;
490 static unsigned short oldx, oldy;
491
492 WARN_CONSOLE_UNLOCKED();
493
494 if (old_offset != -1 && old_offset >= 0 &&
495 old_offset < vc->vc_screenbuf_size) {
496 scr_writew(old, screenpos(vc, old_offset, 1));
497 if (DO_UPDATE(vc))
498 vc->vc_sw->con_putc(vc, old, oldy, oldx);
499 }
500
501 old_offset = offset;
502
503 if (offset != -1 && offset >= 0 &&
504 offset < vc->vc_screenbuf_size) {
505 unsigned short new;
506 unsigned short *p;
507 p = screenpos(vc, offset, 1);
508 old = scr_readw(p);
509 new = old ^ vc->vc_complement_mask;
510 scr_writew(new, p);
511 if (DO_UPDATE(vc)) {
512 oldx = (offset >> 1) % vc->vc_cols;
513 oldy = (offset >> 1) / vc->vc_cols;
514 vc->vc_sw->con_putc(vc, new, oldy, oldx);
515 }
516 }
517
518 }
519
520 static void insert_char(struct vc_data *vc, unsigned int nr)
521 {
522 unsigned short *p, *q = (unsigned short *)vc->vc_pos;
523
524 p = q + vc->vc_cols - nr - vc->vc_x;
525 while (--p >= q)
526 scr_writew(scr_readw(p), p + nr);
527 scr_memsetw(q, vc->vc_video_erase_char, nr * 2);
528 vc->vc_need_wrap = 0;
529 if (DO_UPDATE(vc)) {
530 unsigned short oldattr = vc->vc_attr;
531 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x, vc->vc_y, vc->vc_x + nr, 1,
532 vc->vc_cols - vc->vc_x - nr);
533 vc->vc_attr = vc->vc_video_erase_char >> 8;
534 while (nr--)
535 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y, vc->vc_x + nr);
536 vc->vc_attr = oldattr;
537 }
538 }
539
540 static void delete_char(struct vc_data *vc, unsigned int nr)
541 {
542 unsigned int i = vc->vc_x;
543 unsigned short *p = (unsigned short *)vc->vc_pos;
544
545 while (++i <= vc->vc_cols - nr) {
546 scr_writew(scr_readw(p+nr), p);
547 p++;
548 }
549 scr_memsetw(p, vc->vc_video_erase_char, nr * 2);
550 vc->vc_need_wrap = 0;
551 if (DO_UPDATE(vc)) {
552 unsigned short oldattr = vc->vc_attr;
553 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x + nr, vc->vc_y, vc->vc_x, 1,
554 vc->vc_cols - vc->vc_x - nr);
555 vc->vc_attr = vc->vc_video_erase_char >> 8;
556 while (nr--)
557 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y,
558 vc->vc_cols - 1 - nr);
559 vc->vc_attr = oldattr;
560 }
561 }
562
563 static int softcursor_original;
564
565 static void add_softcursor(struct vc_data *vc)
566 {
567 int i = scr_readw((u16 *) vc->vc_pos);
568 u32 type = vc->vc_cursor_type;
569
570 if (! (type & 0x10)) return;
571 if (softcursor_original != -1) return;
572 softcursor_original = i;
573 i |= ((type >> 8) & 0xff00 );
574 i ^= ((type) & 0xff00 );
575 if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000;
576 if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700;
577 scr_writew(i, (u16 *) vc->vc_pos);
578 if (DO_UPDATE(vc))
579 vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x);
580 }
581
582 static void hide_softcursor(struct vc_data *vc)
583 {
584 if (softcursor_original != -1) {
585 scr_writew(softcursor_original, (u16 *)vc->vc_pos);
586 if (DO_UPDATE(vc))
587 vc->vc_sw->con_putc(vc, softcursor_original,
588 vc->vc_y, vc->vc_x);
589 softcursor_original = -1;
590 }
591 }
592
593 static void hide_cursor(struct vc_data *vc)
594 {
595 if (vc == sel_cons)
596 clear_selection();
597 vc->vc_sw->con_cursor(vc, CM_ERASE);
598 hide_softcursor(vc);
599 }
600
601 static void set_cursor(struct vc_data *vc)
602 {
603 if (!IS_FG(vc) || console_blanked ||
604 vc->vc_mode == KD_GRAPHICS)
605 return;
606 if (vc->vc_deccm) {
607 if (vc == sel_cons)
608 clear_selection();
609 add_softcursor(vc);
610 if ((vc->vc_cursor_type & 0x0f) != 1)
611 vc->vc_sw->con_cursor(vc, CM_DRAW);
612 } else
613 hide_cursor(vc);
614 }
615
616 static void set_origin(struct vc_data *vc)
617 {
618 WARN_CONSOLE_UNLOCKED();
619
620 if (!CON_IS_VISIBLE(vc) ||
621 !vc->vc_sw->con_set_origin ||
622 !vc->vc_sw->con_set_origin(vc))
623 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
624 vc->vc_visible_origin = vc->vc_origin;
625 vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size;
626 vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x;
627 }
628
629 static inline void save_screen(struct vc_data *vc)
630 {
631 WARN_CONSOLE_UNLOCKED();
632
633 if (vc->vc_sw->con_save_screen)
634 vc->vc_sw->con_save_screen(vc);
635 }
636
637 /*
638 * Redrawing of screen
639 */
640
641 static void clear_buffer_attributes(struct vc_data *vc)
642 {
643 unsigned short *p = (unsigned short *)vc->vc_origin;
644 int count = vc->vc_screenbuf_size / 2;
645 int mask = vc->vc_hi_font_mask | 0xff;
646
647 for (; count > 0; count--, p++) {
648 scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p);
649 }
650 }
651
652 void redraw_screen(struct vc_data *vc, int is_switch)
653 {
654 int redraw = 0;
655
656 WARN_CONSOLE_UNLOCKED();
657
658 if (!vc) {
659 /* strange ... */
660 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
661 return;
662 }
663
664 if (is_switch) {
665 struct vc_data *old_vc = vc_cons[fg_console].d;
666 if (old_vc == vc)
667 return;
668 if (!CON_IS_VISIBLE(vc))
669 redraw = 1;
670 *vc->vc_display_fg = vc;
671 fg_console = vc->vc_num;
672 hide_cursor(old_vc);
673 if (!CON_IS_VISIBLE(old_vc)) {
674 save_screen(old_vc);
675 set_origin(old_vc);
676 }
677 } else {
678 hide_cursor(vc);
679 redraw = 1;
680 }
681
682 if (redraw) {
683 int update;
684 int old_was_color = vc->vc_can_do_color;
685
686 set_origin(vc);
687 update = vc->vc_sw->con_switch(vc);
688 set_palette(vc);
689 /*
690 * If console changed from mono<->color, the best we can do
691 * is to clear the buffer attributes. As it currently stands,
692 * rebuilding new attributes from the old buffer is not doable
693 * without overly complex code.
694 */
695 if (old_was_color != vc->vc_can_do_color) {
696 update_attr(vc);
697 clear_buffer_attributes(vc);
698 }
699 if (update && vc->vc_mode != KD_GRAPHICS)
700 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
701 }
702 set_cursor(vc);
703 if (is_switch) {
704 set_leds();
705 compute_shiftstate();
706 notify_update(vc);
707 }
708 }
709
710 /*
711 * Allocation, freeing and resizing of VTs.
712 */
713
714 int vc_cons_allocated(unsigned int i)
715 {
716 return (i < MAX_NR_CONSOLES && vc_cons[i].d);
717 }
718
719 static void visual_init(struct vc_data *vc, int num, int init)
720 {
721 /* ++Geert: vc->vc_sw->con_init determines console size */
722 if (vc->vc_sw)
723 module_put(vc->vc_sw->owner);
724 vc->vc_sw = conswitchp;
725 #ifndef VT_SINGLE_DRIVER
726 if (con_driver_map[num])
727 vc->vc_sw = con_driver_map[num];
728 #endif
729 __module_get(vc->vc_sw->owner);
730 vc->vc_num = num;
731 vc->vc_display_fg = &master_display_fg;
732 vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir;
733 vc->vc_uni_pagedir = 0;
734 vc->vc_hi_font_mask = 0;
735 vc->vc_complement_mask = 0;
736 vc->vc_can_do_color = 0;
737 vc->vc_sw->con_init(vc, init);
738 if (!vc->vc_complement_mask)
739 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
740 vc->vc_s_complement_mask = vc->vc_complement_mask;
741 vc->vc_size_row = vc->vc_cols << 1;
742 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
743 }
744
745 int vc_allocate(unsigned int currcons) /* return 0 on success */
746 {
747 WARN_CONSOLE_UNLOCKED();
748
749 if (currcons >= MAX_NR_CONSOLES)
750 return -ENXIO;
751 if (!vc_cons[currcons].d) {
752 struct vc_data *vc;
753 struct vt_notifier_param param;
754
755 /* prevent users from taking too much memory */
756 if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE))
757 return -EPERM;
758
759 /* due to the granularity of kmalloc, we waste some memory here */
760 /* the alloc is done in two steps, to optimize the common situation
761 of a 25x80 console (structsize=216, screenbuf_size=4000) */
762 /* although the numbers above are not valid since long ago, the
763 point is still up-to-date and the comment still has its value
764 even if only as a historical artifact. --mj, July 1998 */
765 param.vc = vc = kzalloc(sizeof(struct vc_data), GFP_KERNEL);
766 if (!vc)
767 return -ENOMEM;
768 vc_cons[currcons].d = vc;
769 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
770 visual_init(vc, currcons, 1);
771 if (!*vc->vc_uni_pagedir_loc)
772 con_set_default_unimap(vc);
773 if (!vc->vc_kmalloced)
774 vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL);
775 if (!vc->vc_screenbuf) {
776 kfree(vc);
777 vc_cons[currcons].d = NULL;
778 return -ENOMEM;
779 }
780 vc->vc_kmalloced = 1;
781 vc_init(vc, vc->vc_rows, vc->vc_cols, 1);
782 atomic_notifier_call_chain(&vt_notifier_list, VT_ALLOCATE, &param);
783 }
784 return 0;
785 }
786
787 static inline int resize_screen(struct vc_data *vc, int width, int height,
788 int user)
789 {
790 /* Resizes the resolution of the display adapater */
791 int err = 0;
792
793 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize)
794 err = vc->vc_sw->con_resize(vc, width, height, user);
795
796 return err;
797 }
798
799 /*
800 * Change # of rows and columns (0 means unchanged/the size of fg_console)
801 * [this is to be used together with some user program
802 * like resize that changes the hardware videomode]
803 */
804 #define VC_RESIZE_MAXCOL (32767)
805 #define VC_RESIZE_MAXROW (32767)
806
807 /**
808 * vc_do_resize - resizing method for the tty
809 * @tty: tty being resized
810 * @real_tty: real tty (different to tty if a pty/tty pair)
811 * @vc: virtual console private data
812 * @cols: columns
813 * @lines: lines
814 *
815 * Resize a virtual console, clipping according to the actual constraints.
816 * If the caller passes a tty structure then update the termios winsize
817 * information and perform any neccessary signal handling.
818 *
819 * Caller must hold the console semaphore. Takes the termios mutex and
820 * ctrl_lock of the tty IFF a tty is passed.
821 */
822
823 static int vc_do_resize(struct tty_struct *tty, struct tty_struct *real_tty,
824 struct vc_data *vc, unsigned int cols, unsigned int lines)
825 {
826 unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0;
827 unsigned int old_cols, old_rows, old_row_size, old_screen_size;
828 unsigned int new_cols, new_rows, new_row_size, new_screen_size;
829 unsigned int end, user;
830 unsigned short *newscreen;
831
832 WARN_CONSOLE_UNLOCKED();
833
834 if (!vc)
835 return -ENXIO;
836
837 user = vc->vc_resize_user;
838 vc->vc_resize_user = 0;
839
840 if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW)
841 return -EINVAL;
842
843 new_cols = (cols ? cols : vc->vc_cols);
844 new_rows = (lines ? lines : vc->vc_rows);
845 new_row_size = new_cols << 1;
846 new_screen_size = new_row_size * new_rows;
847
848 if (new_cols == vc->vc_cols && new_rows == vc->vc_rows)
849 return 0;
850
851 newscreen = kmalloc(new_screen_size, GFP_USER);
852 if (!newscreen)
853 return -ENOMEM;
854
855 old_rows = vc->vc_rows;
856 old_cols = vc->vc_cols;
857 old_row_size = vc->vc_size_row;
858 old_screen_size = vc->vc_screenbuf_size;
859
860 err = resize_screen(vc, new_cols, new_rows, user);
861 if (err) {
862 kfree(newscreen);
863 return err;
864 }
865
866 vc->vc_rows = new_rows;
867 vc->vc_cols = new_cols;
868 vc->vc_size_row = new_row_size;
869 vc->vc_screenbuf_size = new_screen_size;
870
871 rlth = min(old_row_size, new_row_size);
872 rrem = new_row_size - rlth;
873 old_origin = vc->vc_origin;
874 new_origin = (long) newscreen;
875 new_scr_end = new_origin + new_screen_size;
876
877 if (vc->vc_y > new_rows) {
878 if (old_rows - vc->vc_y < new_rows) {
879 /*
880 * Cursor near the bottom, copy contents from the
881 * bottom of buffer
882 */
883 old_origin += (old_rows - new_rows) * old_row_size;
884 end = vc->vc_scr_end;
885 } else {
886 /*
887 * Cursor is in no man's land, copy 1/2 screenful
888 * from the top and bottom of cursor position
889 */
890 old_origin += (vc->vc_y - new_rows/2) * old_row_size;
891 end = old_origin + (old_row_size * new_rows);
892 }
893 } else
894 /*
895 * Cursor near the top, copy contents from the top of buffer
896 */
897 end = (old_rows > new_rows) ? old_origin +
898 (old_row_size * new_rows) :
899 vc->vc_scr_end;
900
901 update_attr(vc);
902
903 while (old_origin < end) {
904 scr_memcpyw((unsigned short *) new_origin,
905 (unsigned short *) old_origin, rlth);
906 if (rrem)
907 scr_memsetw((void *)(new_origin + rlth),
908 vc->vc_video_erase_char, rrem);
909 old_origin += old_row_size;
910 new_origin += new_row_size;
911 }
912 if (new_scr_end > new_origin)
913 scr_memsetw((void *)new_origin, vc->vc_video_erase_char,
914 new_scr_end - new_origin);
915 if (vc->vc_kmalloced)
916 kfree(vc->vc_screenbuf);
917 vc->vc_screenbuf = newscreen;
918 vc->vc_kmalloced = 1;
919 vc->vc_screenbuf_size = new_screen_size;
920 set_origin(vc);
921
922 /* do part of a reset_terminal() */
923 vc->vc_top = 0;
924 vc->vc_bottom = vc->vc_rows;
925 gotoxy(vc, vc->vc_x, vc->vc_y);
926 save_cur(vc);
927
928 if (tty) {
929 /* Rewrite the requested winsize data with the actual
930 resulting sizes */
931 struct winsize ws;
932 memset(&ws, 0, sizeof(ws));
933 ws.ws_row = vc->vc_rows;
934 ws.ws_col = vc->vc_cols;
935 ws.ws_ypixel = vc->vc_scan_lines;
936 tty_do_resize(tty, real_tty, &ws);
937 }
938
939 if (CON_IS_VISIBLE(vc))
940 update_screen(vc);
941 return err;
942 }
943
944 /**
945 * vc_resize - resize a VT
946 * @vc: virtual console
947 * @cols: columns
948 * @rows: rows
949 *
950 * Resize a virtual console as seen from the console end of things. We
951 * use the common vc_do_resize methods to update the structures. The
952 * caller must hold the console sem to protect console internals and
953 * vc->vc_tty
954 */
955
956 int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int rows)
957 {
958 return vc_do_resize(vc->vc_tty, vc->vc_tty, vc, cols, rows);
959 }
960
961 /**
962 * vt_resize - resize a VT
963 * @tty: tty to resize
964 * @real_tty: tty if a pty/tty pair
965 * @ws: winsize attributes
966 *
967 * Resize a virtual terminal. This is called by the tty layer as we
968 * register our own handler for resizing. The mutual helper does all
969 * the actual work.
970 *
971 * Takes the console sem and the called methods then take the tty
972 * termios_mutex and the tty ctrl_lock in that order.
973 */
974
975 int vt_resize(struct tty_struct *tty, struct tty_struct *real_tty,
976 struct winsize *ws)
977 {
978 struct vc_data *vc = tty->driver_data;
979 int ret;
980
981 acquire_console_sem();
982 ret = vc_do_resize(tty, real_tty, vc, ws->ws_col, ws->ws_row);
983 release_console_sem();
984 return ret;
985 }
986
987 void vc_deallocate(unsigned int currcons)
988 {
989 WARN_CONSOLE_UNLOCKED();
990
991 if (vc_cons_allocated(currcons)) {
992 struct vc_data *vc = vc_cons[currcons].d;
993 struct vt_notifier_param param = { .vc = vc };
994 atomic_notifier_call_chain(&vt_notifier_list, VT_DEALLOCATE, &param);
995 vc->vc_sw->con_deinit(vc);
996 put_pid(vc->vt_pid);
997 module_put(vc->vc_sw->owner);
998 if (vc->vc_kmalloced)
999 kfree(vc->vc_screenbuf);
1000 if (currcons >= MIN_NR_CONSOLES)
1001 kfree(vc);
1002 vc_cons[currcons].d = NULL;
1003 }
1004 }
1005
1006 /*
1007 * VT102 emulator
1008 */
1009
1010 #define set_kbd(vc, x) set_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1011 #define clr_kbd(vc, x) clr_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1012 #define is_kbd(vc, x) vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1013
1014 #define decarm VC_REPEAT
1015 #define decckm VC_CKMODE
1016 #define kbdapplic VC_APPLIC
1017 #define lnm VC_CRLF
1018
1019 /*
1020 * this is what the terminal answers to a ESC-Z or csi0c query.
1021 */
1022 #define VT100ID "\033[?1;2c"
1023 #define VT102ID "\033[?6c"
1024
1025 unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7,
1026 8,12,10,14, 9,13,11,15 };
1027
1028 /* the default colour table, for VGA+ colour systems */
1029 int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
1030 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
1031 int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
1032 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
1033 int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
1034 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
1035
1036 module_param_array(default_red, int, NULL, S_IRUGO | S_IWUSR);
1037 module_param_array(default_grn, int, NULL, S_IRUGO | S_IWUSR);
1038 module_param_array(default_blu, int, NULL, S_IRUGO | S_IWUSR);
1039
1040 /*
1041 * gotoxy() must verify all boundaries, because the arguments
1042 * might also be negative. If the given position is out of
1043 * bounds, the cursor is placed at the nearest margin.
1044 */
1045 static void gotoxy(struct vc_data *vc, int new_x, int new_y)
1046 {
1047 int min_y, max_y;
1048
1049 if (new_x < 0)
1050 vc->vc_x = 0;
1051 else {
1052 if (new_x >= vc->vc_cols)
1053 vc->vc_x = vc->vc_cols - 1;
1054 else
1055 vc->vc_x = new_x;
1056 }
1057
1058 if (vc->vc_decom) {
1059 min_y = vc->vc_top;
1060 max_y = vc->vc_bottom;
1061 } else {
1062 min_y = 0;
1063 max_y = vc->vc_rows;
1064 }
1065 if (new_y < min_y)
1066 vc->vc_y = min_y;
1067 else if (new_y >= max_y)
1068 vc->vc_y = max_y - 1;
1069 else
1070 vc->vc_y = new_y;
1071 vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1);
1072 vc->vc_need_wrap = 0;
1073 }
1074
1075 /* for absolute user moves, when decom is set */
1076 static void gotoxay(struct vc_data *vc, int new_x, int new_y)
1077 {
1078 gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y);
1079 }
1080
1081 void scrollback(struct vc_data *vc, int lines)
1082 {
1083 if (!lines)
1084 lines = vc->vc_rows / 2;
1085 scrolldelta(-lines);
1086 }
1087
1088 void scrollfront(struct vc_data *vc, int lines)
1089 {
1090 if (!lines)
1091 lines = vc->vc_rows / 2;
1092 scrolldelta(lines);
1093 }
1094
1095 static void lf(struct vc_data *vc)
1096 {
1097 /* don't scroll if above bottom of scrolling region, or
1098 * if below scrolling region
1099 */
1100 if (vc->vc_y + 1 == vc->vc_bottom)
1101 scrup(vc, vc->vc_top, vc->vc_bottom, 1);
1102 else if (vc->vc_y < vc->vc_rows - 1) {
1103 vc->vc_y++;
1104 vc->vc_pos += vc->vc_size_row;
1105 }
1106 vc->vc_need_wrap = 0;
1107 notify_write(vc, '\n');
1108 }
1109
1110 static void ri(struct vc_data *vc)
1111 {
1112 /* don't scroll if below top of scrolling region, or
1113 * if above scrolling region
1114 */
1115 if (vc->vc_y == vc->vc_top)
1116 scrdown(vc, vc->vc_top, vc->vc_bottom, 1);
1117 else if (vc->vc_y > 0) {
1118 vc->vc_y--;
1119 vc->vc_pos -= vc->vc_size_row;
1120 }
1121 vc->vc_need_wrap = 0;
1122 }
1123
1124 static inline void cr(struct vc_data *vc)
1125 {
1126 vc->vc_pos -= vc->vc_x << 1;
1127 vc->vc_need_wrap = vc->vc_x = 0;
1128 notify_write(vc, '\r');
1129 }
1130
1131 static inline void bs(struct vc_data *vc)
1132 {
1133 if (vc->vc_x) {
1134 vc->vc_pos -= 2;
1135 vc->vc_x--;
1136 vc->vc_need_wrap = 0;
1137 notify_write(vc, '\b');
1138 }
1139 }
1140
1141 static inline void del(struct vc_data *vc)
1142 {
1143 /* ignored */
1144 }
1145
1146 static void csi_J(struct vc_data *vc, int vpar)
1147 {
1148 unsigned int count;
1149 unsigned short * start;
1150
1151 switch (vpar) {
1152 case 0: /* erase from cursor to end of display */
1153 count = (vc->vc_scr_end - vc->vc_pos) >> 1;
1154 start = (unsigned short *)vc->vc_pos;
1155 if (DO_UPDATE(vc)) {
1156 /* do in two stages */
1157 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1158 vc->vc_cols - vc->vc_x);
1159 vc->vc_sw->con_clear(vc, vc->vc_y + 1, 0,
1160 vc->vc_rows - vc->vc_y - 1,
1161 vc->vc_cols);
1162 }
1163 break;
1164 case 1: /* erase from start to cursor */
1165 count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1;
1166 start = (unsigned short *)vc->vc_origin;
1167 if (DO_UPDATE(vc)) {
1168 /* do in two stages */
1169 vc->vc_sw->con_clear(vc, 0, 0, vc->vc_y,
1170 vc->vc_cols);
1171 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1172 vc->vc_x + 1);
1173 }
1174 break;
1175 case 2: /* erase whole display */
1176 count = vc->vc_cols * vc->vc_rows;
1177 start = (unsigned short *)vc->vc_origin;
1178 if (DO_UPDATE(vc))
1179 vc->vc_sw->con_clear(vc, 0, 0,
1180 vc->vc_rows,
1181 vc->vc_cols);
1182 break;
1183 default:
1184 return;
1185 }
1186 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1187 vc->vc_need_wrap = 0;
1188 }
1189
1190 static void csi_K(struct vc_data *vc, int vpar)
1191 {
1192 unsigned int count;
1193 unsigned short * start;
1194
1195 switch (vpar) {
1196 case 0: /* erase from cursor to end of line */
1197 count = vc->vc_cols - vc->vc_x;
1198 start = (unsigned short *)vc->vc_pos;
1199 if (DO_UPDATE(vc))
1200 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1201 vc->vc_cols - vc->vc_x);
1202 break;
1203 case 1: /* erase from start of line to cursor */
1204 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1205 count = vc->vc_x + 1;
1206 if (DO_UPDATE(vc))
1207 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1208 vc->vc_x + 1);
1209 break;
1210 case 2: /* erase whole line */
1211 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1212 count = vc->vc_cols;
1213 if (DO_UPDATE(vc))
1214 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1215 vc->vc_cols);
1216 break;
1217 default:
1218 return;
1219 }
1220 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1221 vc->vc_need_wrap = 0;
1222 }
1223
1224 static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */
1225 { /* not vt100? */
1226 int count;
1227
1228 if (!vpar)
1229 vpar++;
1230 count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar;
1231
1232 scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count);
1233 if (DO_UPDATE(vc))
1234 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count);
1235 vc->vc_need_wrap = 0;
1236 }
1237
1238 static void default_attr(struct vc_data *vc)
1239 {
1240 vc->vc_intensity = 1;
1241 vc->vc_italic = 0;
1242 vc->vc_underline = 0;
1243 vc->vc_reverse = 0;
1244 vc->vc_blink = 0;
1245 vc->vc_color = vc->vc_def_color;
1246 }
1247
1248 /* console_sem is held */
1249 static void csi_m(struct vc_data *vc)
1250 {
1251 int i;
1252
1253 for (i = 0; i <= vc->vc_npar; i++)
1254 switch (vc->vc_par[i]) {
1255 case 0: /* all attributes off */
1256 default_attr(vc);
1257 break;
1258 case 1:
1259 vc->vc_intensity = 2;
1260 break;
1261 case 2:
1262 vc->vc_intensity = 0;
1263 break;
1264 case 3:
1265 vc->vc_italic = 1;
1266 break;
1267 case 4:
1268 vc->vc_underline = 1;
1269 break;
1270 case 5:
1271 vc->vc_blink = 1;
1272 break;
1273 case 7:
1274 vc->vc_reverse = 1;
1275 break;
1276 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1277 * Select primary font, don't display
1278 * control chars if defined, don't set
1279 * bit 8 on output.
1280 */
1281 vc->vc_translate = set_translate(vc->vc_charset == 0
1282 ? vc->vc_G0_charset
1283 : vc->vc_G1_charset, vc);
1284 vc->vc_disp_ctrl = 0;
1285 vc->vc_toggle_meta = 0;
1286 break;
1287 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1288 * Select first alternate font, lets
1289 * chars < 32 be displayed as ROM chars.
1290 */
1291 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1292 vc->vc_disp_ctrl = 1;
1293 vc->vc_toggle_meta = 0;
1294 break;
1295 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1296 * Select second alternate font, toggle
1297 * high bit before displaying as ROM char.
1298 */
1299 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1300 vc->vc_disp_ctrl = 1;
1301 vc->vc_toggle_meta = 1;
1302 break;
1303 case 21:
1304 case 22:
1305 vc->vc_intensity = 1;
1306 break;
1307 case 23:
1308 vc->vc_italic = 0;
1309 break;
1310 case 24:
1311 vc->vc_underline = 0;
1312 break;
1313 case 25:
1314 vc->vc_blink = 0;
1315 break;
1316 case 27:
1317 vc->vc_reverse = 0;
1318 break;
1319 case 38: /* ANSI X3.64-1979 (SCO-ish?)
1320 * Enables underscore, white foreground
1321 * with white underscore (Linux - use
1322 * default foreground).
1323 */
1324 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1325 vc->vc_underline = 1;
1326 break;
1327 case 39: /* ANSI X3.64-1979 (SCO-ish?)
1328 * Disable underline option.
1329 * Reset colour to default? It did this
1330 * before...
1331 */
1332 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1333 vc->vc_underline = 0;
1334 break;
1335 case 49:
1336 vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f);
1337 break;
1338 default:
1339 if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37)
1340 vc->vc_color = color_table[vc->vc_par[i] - 30]
1341 | (vc->vc_color & 0xf0);
1342 else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47)
1343 vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4)
1344 | (vc->vc_color & 0x0f);
1345 break;
1346 }
1347 update_attr(vc);
1348 }
1349
1350 static void respond_string(const char *p, struct tty_struct *tty)
1351 {
1352 while (*p) {
1353 tty_insert_flip_char(tty, *p, 0);
1354 p++;
1355 }
1356 con_schedule_flip(tty);
1357 }
1358
1359 static void cursor_report(struct vc_data *vc, struct tty_struct *tty)
1360 {
1361 char buf[40];
1362
1363 sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1);
1364 respond_string(buf, tty);
1365 }
1366
1367 static inline void status_report(struct tty_struct *tty)
1368 {
1369 respond_string("\033[0n", tty); /* Terminal ok */
1370 }
1371
1372 static inline void respond_ID(struct tty_struct * tty)
1373 {
1374 respond_string(VT102ID, tty);
1375 }
1376
1377 void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry)
1378 {
1379 char buf[8];
1380
1381 sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx),
1382 (char)('!' + mry));
1383 respond_string(buf, tty);
1384 }
1385
1386 /* invoked via ioctl(TIOCLINUX) and through set_selection */
1387 int mouse_reporting(void)
1388 {
1389 return vc_cons[fg_console].d->vc_report_mouse;
1390 }
1391
1392 /* console_sem is held */
1393 static void set_mode(struct vc_data *vc, int on_off)
1394 {
1395 int i;
1396
1397 for (i = 0; i <= vc->vc_npar; i++)
1398 if (vc->vc_ques) {
1399 switch(vc->vc_par[i]) { /* DEC private modes set/reset */
1400 case 1: /* Cursor keys send ^[Ox/^[[x */
1401 if (on_off)
1402 set_kbd(vc, decckm);
1403 else
1404 clr_kbd(vc, decckm);
1405 break;
1406 case 3: /* 80/132 mode switch unimplemented */
1407 vc->vc_deccolm = on_off;
1408 #if 0
1409 vc_resize(deccolm ? 132 : 80, vc->vc_rows);
1410 /* this alone does not suffice; some user mode
1411 utility has to change the hardware regs */
1412 #endif
1413 break;
1414 case 5: /* Inverted screen on/off */
1415 if (vc->vc_decscnm != on_off) {
1416 vc->vc_decscnm = on_off;
1417 invert_screen(vc, 0, vc->vc_screenbuf_size, 0);
1418 update_attr(vc);
1419 }
1420 break;
1421 case 6: /* Origin relative/absolute */
1422 vc->vc_decom = on_off;
1423 gotoxay(vc, 0, 0);
1424 break;
1425 case 7: /* Autowrap on/off */
1426 vc->vc_decawm = on_off;
1427 break;
1428 case 8: /* Autorepeat on/off */
1429 if (on_off)
1430 set_kbd(vc, decarm);
1431 else
1432 clr_kbd(vc, decarm);
1433 break;
1434 case 9:
1435 vc->vc_report_mouse = on_off ? 1 : 0;
1436 break;
1437 case 25: /* Cursor on/off */
1438 vc->vc_deccm = on_off;
1439 break;
1440 case 1000:
1441 vc->vc_report_mouse = on_off ? 2 : 0;
1442 break;
1443 }
1444 } else {
1445 switch(vc->vc_par[i]) { /* ANSI modes set/reset */
1446 case 3: /* Monitor (display ctrls) */
1447 vc->vc_disp_ctrl = on_off;
1448 break;
1449 case 4: /* Insert Mode on/off */
1450 vc->vc_decim = on_off;
1451 break;
1452 case 20: /* Lf, Enter == CrLf/Lf */
1453 if (on_off)
1454 set_kbd(vc, lnm);
1455 else
1456 clr_kbd(vc, lnm);
1457 break;
1458 }
1459 }
1460 }
1461
1462 /* console_sem is held */
1463 static void setterm_command(struct vc_data *vc)
1464 {
1465 switch(vc->vc_par[0]) {
1466 case 1: /* set color for underline mode */
1467 if (vc->vc_can_do_color &&
1468 vc->vc_par[1] < 16) {
1469 vc->vc_ulcolor = color_table[vc->vc_par[1]];
1470 if (vc->vc_underline)
1471 update_attr(vc);
1472 }
1473 break;
1474 case 2: /* set color for half intensity mode */
1475 if (vc->vc_can_do_color &&
1476 vc->vc_par[1] < 16) {
1477 vc->vc_halfcolor = color_table[vc->vc_par[1]];
1478 if (vc->vc_intensity == 0)
1479 update_attr(vc);
1480 }
1481 break;
1482 case 8: /* store colors as defaults */
1483 vc->vc_def_color = vc->vc_attr;
1484 if (vc->vc_hi_font_mask == 0x100)
1485 vc->vc_def_color >>= 1;
1486 default_attr(vc);
1487 update_attr(vc);
1488 break;
1489 case 9: /* set blanking interval */
1490 blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1491 poke_blanked_console();
1492 break;
1493 case 10: /* set bell frequency in Hz */
1494 if (vc->vc_npar >= 1)
1495 vc->vc_bell_pitch = vc->vc_par[1];
1496 else
1497 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1498 break;
1499 case 11: /* set bell duration in msec */
1500 if (vc->vc_npar >= 1)
1501 vc->vc_bell_duration = (vc->vc_par[1] < 2000) ?
1502 vc->vc_par[1] * HZ / 1000 : 0;
1503 else
1504 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1505 break;
1506 case 12: /* bring specified console to the front */
1507 if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1))
1508 set_console(vc->vc_par[1] - 1);
1509 break;
1510 case 13: /* unblank the screen */
1511 poke_blanked_console();
1512 break;
1513 case 14: /* set vesa powerdown interval */
1514 vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1515 break;
1516 case 15: /* activate the previous console */
1517 set_console(last_console);
1518 break;
1519 }
1520 }
1521
1522 /* console_sem is held */
1523 static void csi_at(struct vc_data *vc, unsigned int nr)
1524 {
1525 if (nr > vc->vc_cols - vc->vc_x)
1526 nr = vc->vc_cols - vc->vc_x;
1527 else if (!nr)
1528 nr = 1;
1529 insert_char(vc, nr);
1530 }
1531
1532 /* console_sem is held */
1533 static void csi_L(struct vc_data *vc, unsigned int nr)
1534 {
1535 if (nr > vc->vc_rows - vc->vc_y)
1536 nr = vc->vc_rows - vc->vc_y;
1537 else if (!nr)
1538 nr = 1;
1539 scrdown(vc, vc->vc_y, vc->vc_bottom, nr);
1540 vc->vc_need_wrap = 0;
1541 }
1542
1543 /* console_sem is held */
1544 static void csi_P(struct vc_data *vc, unsigned int nr)
1545 {
1546 if (nr > vc->vc_cols - vc->vc_x)
1547 nr = vc->vc_cols - vc->vc_x;
1548 else if (!nr)
1549 nr = 1;
1550 delete_char(vc, nr);
1551 }
1552
1553 /* console_sem is held */
1554 static void csi_M(struct vc_data *vc, unsigned int nr)
1555 {
1556 if (nr > vc->vc_rows - vc->vc_y)
1557 nr = vc->vc_rows - vc->vc_y;
1558 else if (!nr)
1559 nr=1;
1560 scrup(vc, vc->vc_y, vc->vc_bottom, nr);
1561 vc->vc_need_wrap = 0;
1562 }
1563
1564 /* console_sem is held (except via vc_init->reset_terminal */
1565 static void save_cur(struct vc_data *vc)
1566 {
1567 vc->vc_saved_x = vc->vc_x;
1568 vc->vc_saved_y = vc->vc_y;
1569 vc->vc_s_intensity = vc->vc_intensity;
1570 vc->vc_s_italic = vc->vc_italic;
1571 vc->vc_s_underline = vc->vc_underline;
1572 vc->vc_s_blink = vc->vc_blink;
1573 vc->vc_s_reverse = vc->vc_reverse;
1574 vc->vc_s_charset = vc->vc_charset;
1575 vc->vc_s_color = vc->vc_color;
1576 vc->vc_saved_G0 = vc->vc_G0_charset;
1577 vc->vc_saved_G1 = vc->vc_G1_charset;
1578 }
1579
1580 /* console_sem is held */
1581 static void restore_cur(struct vc_data *vc)
1582 {
1583 gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y);
1584 vc->vc_intensity = vc->vc_s_intensity;
1585 vc->vc_italic = vc->vc_s_italic;
1586 vc->vc_underline = vc->vc_s_underline;
1587 vc->vc_blink = vc->vc_s_blink;
1588 vc->vc_reverse = vc->vc_s_reverse;
1589 vc->vc_charset = vc->vc_s_charset;
1590 vc->vc_color = vc->vc_s_color;
1591 vc->vc_G0_charset = vc->vc_saved_G0;
1592 vc->vc_G1_charset = vc->vc_saved_G1;
1593 vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc);
1594 update_attr(vc);
1595 vc->vc_need_wrap = 0;
1596 }
1597
1598 enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey,
1599 EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd,
1600 ESpalette };
1601
1602 /* console_sem is held (except via vc_init()) */
1603 static void reset_terminal(struct vc_data *vc, int do_clear)
1604 {
1605 vc->vc_top = 0;
1606 vc->vc_bottom = vc->vc_rows;
1607 vc->vc_state = ESnormal;
1608 vc->vc_ques = 0;
1609 vc->vc_translate = set_translate(LAT1_MAP, vc);
1610 vc->vc_G0_charset = LAT1_MAP;
1611 vc->vc_G1_charset = GRAF_MAP;
1612 vc->vc_charset = 0;
1613 vc->vc_need_wrap = 0;
1614 vc->vc_report_mouse = 0;
1615 vc->vc_utf = default_utf8;
1616 vc->vc_utf_count = 0;
1617
1618 vc->vc_disp_ctrl = 0;
1619 vc->vc_toggle_meta = 0;
1620
1621 vc->vc_decscnm = 0;
1622 vc->vc_decom = 0;
1623 vc->vc_decawm = 1;
1624 vc->vc_deccm = 1;
1625 vc->vc_decim = 0;
1626
1627 set_kbd(vc, decarm);
1628 clr_kbd(vc, decckm);
1629 clr_kbd(vc, kbdapplic);
1630 clr_kbd(vc, lnm);
1631 kbd_table[vc->vc_num].lockstate = 0;
1632 kbd_table[vc->vc_num].slockstate = 0;
1633 kbd_table[vc->vc_num].ledmode = LED_SHOW_FLAGS;
1634 kbd_table[vc->vc_num].ledflagstate = kbd_table[vc->vc_num].default_ledflagstate;
1635 /* do not do set_leds here because this causes an endless tasklet loop
1636 when the keyboard hasn't been initialized yet */
1637
1638 vc->vc_cursor_type = CUR_DEFAULT;
1639 vc->vc_complement_mask = vc->vc_s_complement_mask;
1640
1641 default_attr(vc);
1642 update_attr(vc);
1643
1644 vc->vc_tab_stop[0] = 0x01010100;
1645 vc->vc_tab_stop[1] =
1646 vc->vc_tab_stop[2] =
1647 vc->vc_tab_stop[3] =
1648 vc->vc_tab_stop[4] = 0x01010101;
1649
1650 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1651 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1652
1653 gotoxy(vc, 0, 0);
1654 save_cur(vc);
1655 if (do_clear)
1656 csi_J(vc, 2);
1657 }
1658
1659 /* console_sem is held */
1660 static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
1661 {
1662 /*
1663 * Control characters can be used in the _middle_
1664 * of an escape sequence.
1665 */
1666 switch (c) {
1667 case 0:
1668 return;
1669 case 7:
1670 if (vc->vc_bell_duration)
1671 kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration);
1672 return;
1673 case 8:
1674 bs(vc);
1675 return;
1676 case 9:
1677 vc->vc_pos -= (vc->vc_x << 1);
1678 while (vc->vc_x < vc->vc_cols - 1) {
1679 vc->vc_x++;
1680 if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31)))
1681 break;
1682 }
1683 vc->vc_pos += (vc->vc_x << 1);
1684 notify_write(vc, '\t');
1685 return;
1686 case 10: case 11: case 12:
1687 lf(vc);
1688 if (!is_kbd(vc, lnm))
1689 return;
1690 case 13:
1691 cr(vc);
1692 return;
1693 case 14:
1694 vc->vc_charset = 1;
1695 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1696 vc->vc_disp_ctrl = 1;
1697 return;
1698 case 15:
1699 vc->vc_charset = 0;
1700 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1701 vc->vc_disp_ctrl = 0;
1702 return;
1703 case 24: case 26:
1704 vc->vc_state = ESnormal;
1705 return;
1706 case 27:
1707 vc->vc_state = ESesc;
1708 return;
1709 case 127:
1710 del(vc);
1711 return;
1712 case 128+27:
1713 vc->vc_state = ESsquare;
1714 return;
1715 }
1716 switch(vc->vc_state) {
1717 case ESesc:
1718 vc->vc_state = ESnormal;
1719 switch (c) {
1720 case '[':
1721 vc->vc_state = ESsquare;
1722 return;
1723 case ']':
1724 vc->vc_state = ESnonstd;
1725 return;
1726 case '%':
1727 vc->vc_state = ESpercent;
1728 return;
1729 case 'E':
1730 cr(vc);
1731 lf(vc);
1732 return;
1733 case 'M':
1734 ri(vc);
1735 return;
1736 case 'D':
1737 lf(vc);
1738 return;
1739 case 'H':
1740 vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31));
1741 return;
1742 case 'Z':
1743 respond_ID(tty);
1744 return;
1745 case '7':
1746 save_cur(vc);
1747 return;
1748 case '8':
1749 restore_cur(vc);
1750 return;
1751 case '(':
1752 vc->vc_state = ESsetG0;
1753 return;
1754 case ')':
1755 vc->vc_state = ESsetG1;
1756 return;
1757 case '#':
1758 vc->vc_state = EShash;
1759 return;
1760 case 'c':
1761 reset_terminal(vc, 1);
1762 return;
1763 case '>': /* Numeric keypad */
1764 clr_kbd(vc, kbdapplic);
1765 return;
1766 case '=': /* Appl. keypad */
1767 set_kbd(vc, kbdapplic);
1768 return;
1769 }
1770 return;
1771 case ESnonstd:
1772 if (c=='P') { /* palette escape sequence */
1773 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1774 vc->vc_par[vc->vc_npar] = 0;
1775 vc->vc_npar = 0;
1776 vc->vc_state = ESpalette;
1777 return;
1778 } else if (c=='R') { /* reset palette */
1779 reset_palette(vc);
1780 vc->vc_state = ESnormal;
1781 } else
1782 vc->vc_state = ESnormal;
1783 return;
1784 case ESpalette:
1785 if ( (c>='0'&&c<='9') || (c>='A'&&c<='F') || (c>='a'&&c<='f') ) {
1786 vc->vc_par[vc->vc_npar++] = (c > '9' ? (c & 0xDF) - 'A' + 10 : c - '0');
1787 if (vc->vc_npar == 7) {
1788 int i = vc->vc_par[0] * 3, j = 1;
1789 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1790 vc->vc_palette[i++] += vc->vc_par[j++];
1791 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1792 vc->vc_palette[i++] += vc->vc_par[j++];
1793 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1794 vc->vc_palette[i] += vc->vc_par[j];
1795 set_palette(vc);
1796 vc->vc_state = ESnormal;
1797 }
1798 } else
1799 vc->vc_state = ESnormal;
1800 return;
1801 case ESsquare:
1802 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1803 vc->vc_par[vc->vc_npar] = 0;
1804 vc->vc_npar = 0;
1805 vc->vc_state = ESgetpars;
1806 if (c == '[') { /* Function key */
1807 vc->vc_state=ESfunckey;
1808 return;
1809 }
1810 vc->vc_ques = (c == '?');
1811 if (vc->vc_ques)
1812 return;
1813 case ESgetpars:
1814 if (c == ';' && vc->vc_npar < NPAR - 1) {
1815 vc->vc_npar++;
1816 return;
1817 } else if (c>='0' && c<='9') {
1818 vc->vc_par[vc->vc_npar] *= 10;
1819 vc->vc_par[vc->vc_npar] += c - '0';
1820 return;
1821 } else
1822 vc->vc_state = ESgotpars;
1823 case ESgotpars:
1824 vc->vc_state = ESnormal;
1825 switch(c) {
1826 case 'h':
1827 set_mode(vc, 1);
1828 return;
1829 case 'l':
1830 set_mode(vc, 0);
1831 return;
1832 case 'c':
1833 if (vc->vc_ques) {
1834 if (vc->vc_par[0])
1835 vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16);
1836 else
1837 vc->vc_cursor_type = CUR_DEFAULT;
1838 return;
1839 }
1840 break;
1841 case 'm':
1842 if (vc->vc_ques) {
1843 clear_selection();
1844 if (vc->vc_par[0])
1845 vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1];
1846 else
1847 vc->vc_complement_mask = vc->vc_s_complement_mask;
1848 return;
1849 }
1850 break;
1851 case 'n':
1852 if (!vc->vc_ques) {
1853 if (vc->vc_par[0] == 5)
1854 status_report(tty);
1855 else if (vc->vc_par[0] == 6)
1856 cursor_report(vc, tty);
1857 }
1858 return;
1859 }
1860 if (vc->vc_ques) {
1861 vc->vc_ques = 0;
1862 return;
1863 }
1864 switch(c) {
1865 case 'G': case '`':
1866 if (vc->vc_par[0])
1867 vc->vc_par[0]--;
1868 gotoxy(vc, vc->vc_par[0], vc->vc_y);
1869 return;
1870 case 'A':
1871 if (!vc->vc_par[0])
1872 vc->vc_par[0]++;
1873 gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]);
1874 return;
1875 case 'B': case 'e':
1876 if (!vc->vc_par[0])
1877 vc->vc_par[0]++;
1878 gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]);
1879 return;
1880 case 'C': case 'a':
1881 if (!vc->vc_par[0])
1882 vc->vc_par[0]++;
1883 gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y);
1884 return;
1885 case 'D':
1886 if (!vc->vc_par[0])
1887 vc->vc_par[0]++;
1888 gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y);
1889 return;
1890 case 'E':
1891 if (!vc->vc_par[0])
1892 vc->vc_par[0]++;
1893 gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]);
1894 return;
1895 case 'F':
1896 if (!vc->vc_par[0])
1897 vc->vc_par[0]++;
1898 gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]);
1899 return;
1900 case 'd':
1901 if (vc->vc_par[0])
1902 vc->vc_par[0]--;
1903 gotoxay(vc, vc->vc_x ,vc->vc_par[0]);
1904 return;
1905 case 'H': case 'f':
1906 if (vc->vc_par[0])
1907 vc->vc_par[0]--;
1908 if (vc->vc_par[1])
1909 vc->vc_par[1]--;
1910 gotoxay(vc, vc->vc_par[1], vc->vc_par[0]);
1911 return;
1912 case 'J':
1913 csi_J(vc, vc->vc_par[0]);
1914 return;
1915 case 'K':
1916 csi_K(vc, vc->vc_par[0]);
1917 return;
1918 case 'L':
1919 csi_L(vc, vc->vc_par[0]);
1920 return;
1921 case 'M':
1922 csi_M(vc, vc->vc_par[0]);
1923 return;
1924 case 'P':
1925 csi_P(vc, vc->vc_par[0]);
1926 return;
1927 case 'c':
1928 if (!vc->vc_par[0])
1929 respond_ID(tty);
1930 return;
1931 case 'g':
1932 if (!vc->vc_par[0])
1933 vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31));
1934 else if (vc->vc_par[0] == 3) {
1935 vc->vc_tab_stop[0] =
1936 vc->vc_tab_stop[1] =
1937 vc->vc_tab_stop[2] =
1938 vc->vc_tab_stop[3] =
1939 vc->vc_tab_stop[4] = 0;
1940 }
1941 return;
1942 case 'm':
1943 csi_m(vc);
1944 return;
1945 case 'q': /* DECLL - but only 3 leds */
1946 /* map 0,1,2,3 to 0,1,2,4 */
1947 if (vc->vc_par[0] < 4)
1948 setledstate(kbd_table + vc->vc_num,
1949 (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4);
1950 return;
1951 case 'r':
1952 if (!vc->vc_par[0])
1953 vc->vc_par[0]++;
1954 if (!vc->vc_par[1])
1955 vc->vc_par[1] = vc->vc_rows;
1956 /* Minimum allowed region is 2 lines */
1957 if (vc->vc_par[0] < vc->vc_par[1] &&
1958 vc->vc_par[1] <= vc->vc_rows) {
1959 vc->vc_top = vc->vc_par[0] - 1;
1960 vc->vc_bottom = vc->vc_par[1];
1961 gotoxay(vc, 0, 0);
1962 }
1963 return;
1964 case 's':
1965 save_cur(vc);
1966 return;
1967 case 'u':
1968 restore_cur(vc);
1969 return;
1970 case 'X':
1971 csi_X(vc, vc->vc_par[0]);
1972 return;
1973 case '@':
1974 csi_at(vc, vc->vc_par[0]);
1975 return;
1976 case ']': /* setterm functions */
1977 setterm_command(vc);
1978 return;
1979 }
1980 return;
1981 case ESpercent:
1982 vc->vc_state = ESnormal;
1983 switch (c) {
1984 case '@': /* defined in ISO 2022 */
1985 vc->vc_utf = 0;
1986 return;
1987 case 'G': /* prelim official escape code */
1988 case '8': /* retained for compatibility */
1989 vc->vc_utf = 1;
1990 return;
1991 }
1992 return;
1993 case ESfunckey:
1994 vc->vc_state = ESnormal;
1995 return;
1996 case EShash:
1997 vc->vc_state = ESnormal;
1998 if (c == '8') {
1999 /* DEC screen alignment test. kludge :-) */
2000 vc->vc_video_erase_char =
2001 (vc->vc_video_erase_char & 0xff00) | 'E';
2002 csi_J(vc, 2);
2003 vc->vc_video_erase_char =
2004 (vc->vc_video_erase_char & 0xff00) | ' ';
2005 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
2006 }
2007 return;
2008 case ESsetG0:
2009 if (c == '0')
2010 vc->vc_G0_charset = GRAF_MAP;
2011 else if (c == 'B')
2012 vc->vc_G0_charset = LAT1_MAP;
2013 else if (c == 'U')
2014 vc->vc_G0_charset = IBMPC_MAP;
2015 else if (c == 'K')
2016 vc->vc_G0_charset = USER_MAP;
2017 if (vc->vc_charset == 0)
2018 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
2019 vc->vc_state = ESnormal;
2020 return;
2021 case ESsetG1:
2022 if (c == '0')
2023 vc->vc_G1_charset = GRAF_MAP;
2024 else if (c == 'B')
2025 vc->vc_G1_charset = LAT1_MAP;
2026 else if (c == 'U')
2027 vc->vc_G1_charset = IBMPC_MAP;
2028 else if (c == 'K')
2029 vc->vc_G1_charset = USER_MAP;
2030 if (vc->vc_charset == 1)
2031 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
2032 vc->vc_state = ESnormal;
2033 return;
2034 default:
2035 vc->vc_state = ESnormal;
2036 }
2037 }
2038
2039 /* This is a temporary buffer used to prepare a tty console write
2040 * so that we can easily avoid touching user space while holding the
2041 * console spinlock. It is allocated in con_init and is shared by
2042 * this code and the vc_screen read/write tty calls.
2043 *
2044 * We have to allocate this statically in the kernel data section
2045 * since console_init (and thus con_init) are called before any
2046 * kernel memory allocation is available.
2047 */
2048 char con_buf[CON_BUF_SIZE];
2049 DEFINE_MUTEX(con_buf_mtx);
2050
2051 /* is_double_width() is based on the wcwidth() implementation by
2052 * Markus Kuhn -- 2007-05-26 (Unicode 5.0)
2053 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
2054 */
2055 struct interval {
2056 uint32_t first;
2057 uint32_t last;
2058 };
2059
2060 static int bisearch(uint32_t ucs, const struct interval *table, int max)
2061 {
2062 int min = 0;
2063 int mid;
2064
2065 if (ucs < table[0].first || ucs > table[max].last)
2066 return 0;
2067 while (max >= min) {
2068 mid = (min + max) / 2;
2069 if (ucs > table[mid].last)
2070 min = mid + 1;
2071 else if (ucs < table[mid].first)
2072 max = mid - 1;
2073 else
2074 return 1;
2075 }
2076 return 0;
2077 }
2078
2079 static int is_double_width(uint32_t ucs)
2080 {
2081 static const struct interval double_width[] = {
2082 { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E },
2083 { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF },
2084 { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 },
2085 { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD }
2086 };
2087 return bisearch(ucs, double_width, ARRAY_SIZE(double_width) - 1);
2088 }
2089
2090 /* acquires console_sem */
2091 static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2092 {
2093 #ifdef VT_BUF_VRAM_ONLY
2094 #define FLUSH do { } while(0);
2095 #else
2096 #define FLUSH if (draw_x >= 0) { \
2097 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
2098 draw_x = -1; \
2099 }
2100 #endif
2101
2102 int c, tc, ok, n = 0, draw_x = -1;
2103 unsigned int currcons;
2104 unsigned long draw_from = 0, draw_to = 0;
2105 struct vc_data *vc;
2106 unsigned char vc_attr;
2107 struct vt_notifier_param param;
2108 uint8_t rescan;
2109 uint8_t inverse;
2110 uint8_t width;
2111 u16 himask, charmask;
2112 const unsigned char *orig_buf = NULL;
2113 int orig_count;
2114
2115 if (in_interrupt())
2116 return count;
2117
2118 might_sleep();
2119
2120 acquire_console_sem();
2121 vc = tty->driver_data;
2122 if (vc == NULL) {
2123 printk(KERN_ERR "vt: argh, driver_data is NULL !\n");
2124 release_console_sem();
2125 return 0;
2126 }
2127
2128 currcons = vc->vc_num;
2129 if (!vc_cons_allocated(currcons)) {
2130 /* could this happen? */
2131 static int error = 0;
2132 if (!error) {
2133 error = 1;
2134 printk("con_write: tty %d not allocated\n", currcons+1);
2135 }
2136 release_console_sem();
2137 return 0;
2138 }
2139 release_console_sem();
2140
2141 orig_buf = buf;
2142 orig_count = count;
2143
2144 /* At this point 'buf' is guaranteed to be a kernel buffer
2145 * and therefore no access to userspace (and therefore sleeping)
2146 * will be needed. The con_buf_mtx serializes all tty based
2147 * console rendering and vcs write/read operations. We hold
2148 * the console spinlock during the entire write.
2149 */
2150
2151 acquire_console_sem();
2152
2153 vc = tty->driver_data;
2154 if (vc == NULL) {
2155 printk(KERN_ERR "vt: argh, driver_data _became_ NULL !\n");
2156 release_console_sem();
2157 goto out;
2158 }
2159
2160 himask = vc->vc_hi_font_mask;
2161 charmask = himask ? 0x1ff : 0xff;
2162
2163 /* undraw cursor first */
2164 if (IS_FG(vc))
2165 hide_cursor(vc);
2166
2167 param.vc = vc;
2168
2169 while (!tty->stopped && count) {
2170 int orig = *buf;
2171 c = orig;
2172 buf++;
2173 n++;
2174 count--;
2175 rescan = 0;
2176 inverse = 0;
2177 width = 1;
2178
2179 /* Do no translation at all in control states */
2180 if (vc->vc_state != ESnormal) {
2181 tc = c;
2182 } else if (vc->vc_utf && !vc->vc_disp_ctrl) {
2183 /* Combine UTF-8 into Unicode in vc_utf_char.
2184 * vc_utf_count is the number of continuation bytes still
2185 * expected to arrive.
2186 * vc_npar is the number of continuation bytes arrived so
2187 * far
2188 */
2189 rescan_last_byte:
2190 if ((c & 0xc0) == 0x80) {
2191 /* Continuation byte received */
2192 static const uint32_t utf8_length_changes[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff };
2193 if (vc->vc_utf_count) {
2194 vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f);
2195 vc->vc_npar++;
2196 if (--vc->vc_utf_count) {
2197 /* Still need some bytes */
2198 continue;
2199 }
2200 /* Got a whole character */
2201 c = vc->vc_utf_char;
2202 /* Reject overlong sequences */
2203 if (c <= utf8_length_changes[vc->vc_npar - 1] ||
2204 c > utf8_length_changes[vc->vc_npar])
2205 c = 0xfffd;
2206 } else {
2207 /* Unexpected continuation byte */
2208 vc->vc_utf_count = 0;
2209 c = 0xfffd;
2210 }
2211 } else {
2212 /* Single ASCII byte or first byte of a sequence received */
2213 if (vc->vc_utf_count) {
2214 /* Continuation byte expected */
2215 rescan = 1;
2216 vc->vc_utf_count = 0;
2217 c = 0xfffd;
2218 } else if (c > 0x7f) {
2219 /* First byte of a multibyte sequence received */
2220 vc->vc_npar = 0;
2221 if ((c & 0xe0) == 0xc0) {
2222 vc->vc_utf_count = 1;
2223 vc->vc_utf_char = (c & 0x1f);
2224 } else if ((c & 0xf0) == 0xe0) {
2225 vc->vc_utf_count = 2;
2226 vc->vc_utf_char = (c & 0x0f);
2227 } else if ((c & 0xf8) == 0xf0) {
2228 vc->vc_utf_count = 3;
2229 vc->vc_utf_char = (c & 0x07);
2230 } else if ((c & 0xfc) == 0xf8) {
2231 vc->vc_utf_count = 4;
2232 vc->vc_utf_char = (c & 0x03);
2233 } else if ((c & 0xfe) == 0xfc) {
2234 vc->vc_utf_count = 5;
2235 vc->vc_utf_char = (c & 0x01);
2236 } else {
2237 /* 254 and 255 are invalid */
2238 c = 0xfffd;
2239 }
2240 if (vc->vc_utf_count) {
2241 /* Still need some bytes */
2242 continue;
2243 }
2244 }
2245 /* Nothing to do if an ASCII byte was received */
2246 }
2247 /* End of UTF-8 decoding. */
2248 /* c is the received character, or U+FFFD for invalid sequences. */
2249 /* Replace invalid Unicode code points with U+FFFD too */
2250 if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff)
2251 c = 0xfffd;
2252 tc = c;
2253 } else { /* no utf or alternate charset mode */
2254 tc = vc_translate(vc, c);
2255 }
2256
2257 param.c = tc;
2258 if (atomic_notifier_call_chain(&vt_notifier_list, VT_PREWRITE,
2259 &param) == NOTIFY_STOP)
2260 continue;
2261
2262 /* If the original code was a control character we
2263 * only allow a glyph to be displayed if the code is
2264 * not normally used (such as for cursor movement) or
2265 * if the disp_ctrl mode has been explicitly enabled.
2266 * Certain characters (as given by the CTRL_ALWAYS
2267 * bitmap) are always displayed as control characters,
2268 * as the console would be pretty useless without
2269 * them; to display an arbitrary font position use the
2270 * direct-to-font zone in UTF-8 mode.
2271 */
2272 ok = tc && (c >= 32 ||
2273 !(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 :
2274 vc->vc_utf || ((CTRL_ACTION >> c) & 1)))
2275 && (c != 127 || vc->vc_disp_ctrl)
2276 && (c != 128+27);
2277
2278 if (vc->vc_state == ESnormal && ok) {
2279 if (vc->vc_utf && !vc->vc_disp_ctrl) {
2280 if (is_double_width(c))
2281 width = 2;
2282 }
2283 /* Now try to find out how to display it */
2284 tc = conv_uni_to_pc(vc, tc);
2285 if (tc & ~charmask) {
2286 if (tc == -1 || tc == -2) {
2287 continue; /* nothing to display */
2288 }
2289 /* Glyph not found */
2290 if ((!(vc->vc_utf && !vc->vc_disp_ctrl) || c < 128) && !(c & ~charmask)) {
2291 /* In legacy mode use the glyph we get by a 1:1 mapping.
2292 This would make absolutely no sense with Unicode in mind,
2293 but do this for ASCII characters since a font may lack
2294 Unicode mapping info and we don't want to end up with
2295 having question marks only. */
2296 tc = c;
2297 } else {
2298 /* Display U+FFFD. If it's not found, display an inverse question mark. */
2299 tc = conv_uni_to_pc(vc, 0xfffd);
2300 if (tc < 0) {
2301 inverse = 1;
2302 tc = conv_uni_to_pc(vc, '?');
2303 if (tc < 0) tc = '?';
2304 }
2305 }
2306 }
2307
2308 if (!inverse) {
2309 vc_attr = vc->vc_attr;
2310 } else {
2311 /* invert vc_attr */
2312 if (!vc->vc_can_do_color) {
2313 vc_attr = (vc->vc_attr) ^ 0x08;
2314 } else if (vc->vc_hi_font_mask == 0x100) {
2315 vc_attr = ((vc->vc_attr) & 0x11) | (((vc->vc_attr) & 0xe0) >> 4) | (((vc->vc_attr) & 0x0e) << 4);
2316 } else {
2317 vc_attr = ((vc->vc_attr) & 0x88) | (((vc->vc_attr) & 0x70) >> 4) | (((vc->vc_attr) & 0x07) << 4);
2318 }
2319 FLUSH
2320 }
2321
2322 while (1) {
2323 if (vc->vc_need_wrap || vc->vc_decim)
2324 FLUSH
2325 if (vc->vc_need_wrap) {
2326 cr(vc);
2327 lf(vc);
2328 }
2329 if (vc->vc_decim)
2330 insert_char(vc, 1);
2331 scr_writew(himask ?
2332 ((vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) :
2333 (vc_attr << 8) + tc,
2334 (u16 *) vc->vc_pos);
2335 if (DO_UPDATE(vc) && draw_x < 0) {
2336 draw_x = vc->vc_x;
2337 draw_from = vc->vc_pos;
2338 }
2339 if (vc->vc_x == vc->vc_cols - 1) {
2340 vc->vc_need_wrap = vc->vc_decawm;
2341 draw_to = vc->vc_pos + 2;
2342 } else {
2343 vc->vc_x++;
2344 draw_to = (vc->vc_pos += 2);
2345 }
2346
2347 if (!--width) break;
2348
2349 tc = conv_uni_to_pc(vc, ' '); /* A space is printed in the second column */
2350 if (tc < 0) tc = ' ';
2351 }
2352 notify_write(vc, c);
2353
2354 if (inverse) {
2355 FLUSH
2356 }
2357
2358 if (rescan) {
2359 rescan = 0;
2360 inverse = 0;
2361 width = 1;
2362 c = orig;
2363 goto rescan_last_byte;
2364 }
2365 continue;
2366 }
2367 FLUSH
2368 do_con_trol(tty, vc, orig);
2369 }
2370 FLUSH
2371 console_conditional_schedule();
2372 release_console_sem();
2373
2374 out:
2375 notify_update(vc);
2376 return n;
2377 #undef FLUSH
2378 }
2379
2380 /*
2381 * This is the console switching callback.
2382 *
2383 * Doing console switching in a process context allows
2384 * us to do the switches asynchronously (needed when we want
2385 * to switch due to a keyboard interrupt). Synchronization
2386 * with other console code and prevention of re-entrancy is
2387 * ensured with console_sem.
2388 */
2389 static void console_callback(struct work_struct *ignored)
2390 {
2391 acquire_console_sem();
2392
2393 if (want_console >= 0) {
2394 if (want_console != fg_console &&
2395 vc_cons_allocated(want_console)) {
2396 hide_cursor(vc_cons[fg_console].d);
2397 change_console(vc_cons[want_console].d);
2398 /* we only changed when the console had already
2399 been allocated - a new console is not created
2400 in an interrupt routine */
2401 }
2402 want_console = -1;
2403 }
2404 if (do_poke_blanked_console) { /* do not unblank for a LED change */
2405 do_poke_blanked_console = 0;
2406 poke_blanked_console();
2407 }
2408 if (scrollback_delta) {
2409 struct vc_data *vc = vc_cons[fg_console].d;
2410 clear_selection();
2411 if (vc->vc_mode == KD_TEXT)
2412 vc->vc_sw->con_scrolldelta(vc, scrollback_delta);
2413 scrollback_delta = 0;
2414 }
2415 if (blank_timer_expired) {
2416 do_blank_screen(0);
2417 blank_timer_expired = 0;
2418 }
2419 notify_update(vc_cons[fg_console].d);
2420
2421 release_console_sem();
2422 }
2423
2424 int set_console(int nr)
2425 {
2426 struct vc_data *vc = vc_cons[fg_console].d;
2427
2428 if (!vc_cons_allocated(nr) || vt_dont_switch ||
2429 (vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) {
2430
2431 /*
2432 * Console switch will fail in console_callback() or
2433 * change_console() so there is no point scheduling
2434 * the callback
2435 *
2436 * Existing set_console() users don't check the return
2437 * value so this shouldn't break anything
2438 */
2439 return -EINVAL;
2440 }
2441
2442 want_console = nr;
2443 schedule_console_callback();
2444
2445 return 0;
2446 }
2447
2448 struct tty_driver *console_driver;
2449
2450 #ifdef CONFIG_VT_CONSOLE
2451
2452 /*
2453 * Console on virtual terminal
2454 *
2455 * The console must be locked when we get here.
2456 */
2457
2458 static void vt_console_print(struct console *co, const char *b, unsigned count)
2459 {
2460 struct vc_data *vc = vc_cons[fg_console].d;
2461 unsigned char c;
2462 static DEFINE_SPINLOCK(printing_lock);
2463 const ushort *start;
2464 ushort cnt = 0;
2465 ushort myx;
2466
2467 /* console busy or not yet initialized */
2468 if (!printable)
2469 return;
2470 if (!spin_trylock(&printing_lock))
2471 return;
2472
2473 if (kmsg_redirect && vc_cons_allocated(kmsg_redirect - 1))
2474 vc = vc_cons[kmsg_redirect - 1].d;
2475
2476 /* read `x' only after setting currcons properly (otherwise
2477 the `x' macro will read the x of the foreground console). */
2478 myx = vc->vc_x;
2479
2480 if (!vc_cons_allocated(fg_console)) {
2481 /* impossible */
2482 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2483 goto quit;
2484 }
2485
2486 if (vc->vc_mode != KD_TEXT)
2487 goto quit;
2488
2489 /* undraw cursor first */
2490 if (IS_FG(vc))
2491 hide_cursor(vc);
2492
2493 start = (ushort *)vc->vc_pos;
2494
2495 /* Contrived structure to try to emulate original need_wrap behaviour
2496 * Problems caused when we have need_wrap set on '\n' character */
2497 while (count--) {
2498 c = *b++;
2499 if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) {
2500 if (cnt > 0) {
2501 if (CON_IS_VISIBLE(vc))
2502 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2503 vc->vc_x += cnt;
2504 if (vc->vc_need_wrap)
2505 vc->vc_x--;
2506 cnt = 0;
2507 }
2508 if (c == 8) { /* backspace */
2509 bs(vc);
2510 start = (ushort *)vc->vc_pos;
2511 myx = vc->vc_x;
2512 continue;
2513 }
2514 if (c != 13)
2515 lf(vc);
2516 cr(vc);
2517 start = (ushort *)vc->vc_pos;
2518 myx = vc->vc_x;
2519 if (c == 10 || c == 13)
2520 continue;
2521 }
2522 scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos);
2523 notify_write(vc, c);
2524 cnt++;
2525 if (myx == vc->vc_cols - 1) {
2526 vc->vc_need_wrap = 1;
2527 continue;
2528 }
2529 vc->vc_pos += 2;
2530 myx++;
2531 }
2532 if (cnt > 0) {
2533 if (CON_IS_VISIBLE(vc))
2534 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2535 vc->vc_x += cnt;
2536 if (vc->vc_x == vc->vc_cols) {
2537 vc->vc_x--;
2538 vc->vc_need_wrap = 1;
2539 }
2540 }
2541 set_cursor(vc);
2542 notify_update(vc);
2543
2544 quit:
2545 spin_unlock(&printing_lock);
2546 }
2547
2548 static struct tty_driver *vt_console_device(struct console *c, int *index)
2549 {
2550 *index = c->index ? c->index-1 : fg_console;
2551 return console_driver;
2552 }
2553
2554 static struct console vt_console_driver = {
2555 .name = "tty",
2556 .write = vt_console_print,
2557 .device = vt_console_device,
2558 .unblank = unblank_screen,
2559 .flags = CON_PRINTBUFFER,
2560 .index = -1,
2561 };
2562 #endif
2563
2564 /*
2565 * Handling of Linux-specific VC ioctls
2566 */
2567
2568 /*
2569 * Generally a bit racy with respect to console_sem().
2570 *
2571 * There are some functions which don't need it.
2572 *
2573 * There are some functions which can sleep for arbitrary periods
2574 * (paste_selection) but we don't need the lock there anyway.
2575 *
2576 * set_selection has locking, and definitely needs it
2577 */
2578
2579 int tioclinux(struct tty_struct *tty, unsigned long arg)
2580 {
2581 char type, data;
2582 char __user *p = (char __user *)arg;
2583 int lines;
2584 int ret;
2585
2586 if (tty->driver->type != TTY_DRIVER_TYPE_CONSOLE)
2587 return -EINVAL;
2588 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN))
2589 return -EPERM;
2590 if (get_user(type, p))
2591 return -EFAULT;
2592 ret = 0;
2593
2594 lock_kernel();
2595
2596 switch (type)
2597 {
2598 case TIOCL_SETSEL:
2599 acquire_console_sem();
2600 ret = set_selection((struct tiocl_selection __user *)(p+1), tty);
2601 release_console_sem();
2602 break;
2603 case TIOCL_PASTESEL:
2604 ret = paste_selection(tty);
2605 break;
2606 case TIOCL_UNBLANKSCREEN:
2607 acquire_console_sem();
2608 unblank_screen();
2609 release_console_sem();
2610 break;
2611 case TIOCL_SELLOADLUT:
2612 ret = sel_loadlut(p);
2613 break;
2614 case TIOCL_GETSHIFTSTATE:
2615
2616 /*
2617 * Make it possible to react to Shift+Mousebutton.
2618 * Note that 'shift_state' is an undocumented
2619 * kernel-internal variable; programs not closely
2620 * related to the kernel should not use this.
2621 */
2622 data = shift_state;
2623 ret = __put_user(data, p);
2624 break;
2625 case TIOCL_GETMOUSEREPORTING:
2626 data = mouse_reporting();
2627 ret = __put_user(data, p);
2628 break;
2629 case TIOCL_SETVESABLANK:
2630 ret = set_vesa_blanking(p);
2631 break;
2632 case TIOCL_GETKMSGREDIRECT:
2633 data = kmsg_redirect;
2634 ret = __put_user(data, p);
2635 break;
2636 case TIOCL_SETKMSGREDIRECT:
2637 if (!capable(CAP_SYS_ADMIN)) {
2638 ret = -EPERM;
2639 } else {
2640 if (get_user(data, p+1))
2641 ret = -EFAULT;
2642 else
2643 kmsg_redirect = data;
2644 }
2645 break;
2646 case TIOCL_GETFGCONSOLE:
2647 ret = fg_console;
2648 break;
2649 case TIOCL_SCROLLCONSOLE:
2650 if (get_user(lines, (s32 __user *)(p+4))) {
2651 ret = -EFAULT;
2652 } else {
2653 scrollfront(vc_cons[fg_console].d, lines);
2654 ret = 0;
2655 }
2656 break;
2657 case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
2658 acquire_console_sem();
2659 ignore_poke = 1;
2660 do_blank_screen(0);
2661 release_console_sem();
2662 break;
2663 case TIOCL_BLANKEDSCREEN:
2664 ret = console_blanked;
2665 break;
2666 default:
2667 ret = -EINVAL;
2668 break;
2669 }
2670 unlock_kernel();
2671 return ret;
2672 }
2673
2674 /*
2675 * /dev/ttyN handling
2676 */
2677
2678 static int con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2679 {
2680 int retval;
2681
2682 retval = do_con_write(tty, buf, count);
2683 con_flush_chars(tty);
2684
2685 return retval;
2686 }
2687
2688 static int con_put_char(struct tty_struct *tty, unsigned char ch)
2689 {
2690 if (in_interrupt())
2691 return 0; /* n_r3964 calls put_char() from interrupt context */
2692 return do_con_write(tty, &ch, 1);
2693 }
2694
2695 static int con_write_room(struct tty_struct *tty)
2696 {
2697 if (tty->stopped)
2698 return 0;
2699 return 4096; /* No limit, really; we're not buffering */
2700 }
2701
2702 static int con_chars_in_buffer(struct tty_struct *tty)
2703 {
2704 return 0; /* we're not buffering */
2705 }
2706
2707 /*
2708 * con_throttle and con_unthrottle are only used for
2709 * paste_selection(), which has to stuff in a large number of
2710 * characters...
2711 */
2712 static void con_throttle(struct tty_struct *tty)
2713 {
2714 }
2715
2716 static void con_unthrottle(struct tty_struct *tty)
2717 {
2718 struct vc_data *vc = tty->driver_data;
2719
2720 wake_up_interruptible(&vc->paste_wait);
2721 }
2722
2723 /*
2724 * Turn the Scroll-Lock LED on when the tty is stopped
2725 */
2726 static void con_stop(struct tty_struct *tty)
2727 {
2728 int console_num;
2729 if (!tty)
2730 return;
2731 console_num = tty->index;
2732 if (!vc_cons_allocated(console_num))
2733 return;
2734 set_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2735 set_leds();
2736 }
2737
2738 /*
2739 * Turn the Scroll-Lock LED off when the console is started
2740 */
2741 static void con_start(struct tty_struct *tty)
2742 {
2743 int console_num;
2744 if (!tty)
2745 return;
2746 console_num = tty->index;
2747 if (!vc_cons_allocated(console_num))
2748 return;
2749 clr_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2750 set_leds();
2751 }
2752
2753 static void con_flush_chars(struct tty_struct *tty)
2754 {
2755 struct vc_data *vc;
2756
2757 if (in_interrupt()) /* from flush_to_ldisc */
2758 return;
2759
2760 /* if we race with con_close(), vt may be null */
2761 acquire_console_sem();
2762 vc = tty->driver_data;
2763 if (vc)
2764 set_cursor(vc);
2765 release_console_sem();
2766 }
2767
2768 /*
2769 * Allocate the console screen memory.
2770 */
2771 static int con_open(struct tty_struct *tty, struct file *filp)
2772 {
2773 unsigned int currcons = tty->index;
2774 int ret = 0;
2775
2776 acquire_console_sem();
2777 if (tty->driver_data == NULL) {
2778 ret = vc_allocate(currcons);
2779 if (ret == 0) {
2780 struct vc_data *vc = vc_cons[currcons].d;
2781 tty->driver_data = vc;
2782 vc->vc_tty = tty;
2783
2784 if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
2785 tty->winsize.ws_row = vc_cons[currcons].d->vc_rows;
2786 tty->winsize.ws_col = vc_cons[currcons].d->vc_cols;
2787 }
2788 if (vc->vc_utf)
2789 tty->termios->c_iflag |= IUTF8;
2790 else
2791 tty->termios->c_iflag &= ~IUTF8;
2792 vcs_make_sysfs(tty);
2793 release_console_sem();
2794 return ret;
2795 }
2796 }
2797 release_console_sem();
2798 return ret;
2799 }
2800
2801 /*
2802 * We take tty_mutex in here to prevent another thread from coming in via init_dev
2803 * and taking a ref against the tty while we're in the process of forgetting
2804 * about it and cleaning things up.
2805 *
2806 * This is because vcs_remove_sysfs() can sleep and will drop the BKL.
2807 */
2808 static void con_close(struct tty_struct *tty, struct file *filp)
2809 {
2810 mutex_lock(&tty_mutex);
2811 acquire_console_sem();
2812 if (tty && tty->count == 1) {
2813 struct vc_data *vc = tty->driver_data;
2814
2815 if (vc)
2816 vc->vc_tty = NULL;
2817 tty->driver_data = NULL;
2818 vcs_remove_sysfs(tty);
2819 release_console_sem();
2820 mutex_unlock(&tty_mutex);
2821 /*
2822 * tty_mutex is released, but we still hold BKL, so there is
2823 * still exclusion against init_dev()
2824 */
2825 return;
2826 }
2827 release_console_sem();
2828 mutex_unlock(&tty_mutex);
2829 }
2830
2831 static int default_italic_color = 2; // green (ASCII)
2832 static int default_underline_color = 3; // cyan (ASCII)
2833 module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR);
2834 module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR);
2835
2836 static void vc_init(struct vc_data *vc, unsigned int rows,
2837 unsigned int cols, int do_clear)
2838 {
2839 int j, k ;
2840
2841 vc->vc_cols = cols;
2842 vc->vc_rows = rows;
2843 vc->vc_size_row = cols << 1;
2844 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
2845
2846 set_origin(vc);
2847 vc->vc_pos = vc->vc_origin;
2848 reset_vc(vc);
2849 for (j=k=0; j<16; j++) {
2850 vc->vc_palette[k++] = default_red[j] ;
2851 vc->vc_palette[k++] = default_grn[j] ;
2852 vc->vc_palette[k++] = default_blu[j] ;
2853 }
2854 vc->vc_def_color = 0x07; /* white */
2855 vc->vc_ulcolor = default_underline_color;
2856 vc->vc_itcolor = default_italic_color;
2857 vc->vc_halfcolor = 0x08; /* grey */
2858 init_waitqueue_head(&vc->paste_wait);
2859 reset_terminal(vc, do_clear);
2860 }
2861
2862 /*
2863 * This routine initializes console interrupts, and does nothing
2864 * else. If you want the screen to clear, call tty_write with
2865 * the appropriate escape-sequence.
2866 */
2867
2868 static int __init con_init(void)
2869 {
2870 const char *display_desc = NULL;
2871 struct vc_data *vc;
2872 unsigned int currcons = 0, i;
2873
2874 acquire_console_sem();
2875
2876 if (conswitchp)
2877 display_desc = conswitchp->con_startup();
2878 if (!display_desc) {
2879 fg_console = 0;
2880 release_console_sem();
2881 return 0;
2882 }
2883
2884 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2885 struct con_driver *con_driver = &registered_con_driver[i];
2886
2887 if (con_driver->con == NULL) {
2888 con_driver->con = conswitchp;
2889 con_driver->desc = display_desc;
2890 con_driver->flag = CON_DRIVER_FLAG_INIT;
2891 con_driver->first = 0;
2892 con_driver->last = MAX_NR_CONSOLES - 1;
2893 break;
2894 }
2895 }
2896
2897 for (i = 0; i < MAX_NR_CONSOLES; i++)
2898 con_driver_map[i] = conswitchp;
2899
2900 if (blankinterval) {
2901 blank_state = blank_normal_wait;
2902 mod_timer(&console_timer, jiffies + blankinterval);
2903 }
2904
2905 /*
2906 * kmalloc is not running yet - we use the bootmem allocator.
2907 */
2908 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) {
2909 vc_cons[currcons].d = vc = alloc_bootmem(sizeof(struct vc_data));
2910 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
2911 visual_init(vc, currcons, 1);
2912 vc->vc_screenbuf = (unsigned short *)alloc_bootmem(vc->vc_screenbuf_size);
2913 vc->vc_kmalloced = 0;
2914 vc_init(vc, vc->vc_rows, vc->vc_cols,
2915 currcons || !vc->vc_sw->con_save_screen);
2916 }
2917 currcons = fg_console = 0;
2918 master_display_fg = vc = vc_cons[currcons].d;
2919 set_origin(vc);
2920 save_screen(vc);
2921 gotoxy(vc, vc->vc_x, vc->vc_y);
2922 csi_J(vc, 0);
2923 update_screen(vc);
2924 printk("Console: %s %s %dx%d",
2925 vc->vc_can_do_color ? "colour" : "mono",
2926 display_desc, vc->vc_cols, vc->vc_rows);
2927 printable = 1;
2928 printk("\n");
2929
2930 release_console_sem();
2931
2932 #ifdef CONFIG_VT_CONSOLE
2933 register_console(&vt_console_driver);
2934 #endif
2935 return 0;
2936 }
2937 console_initcall(con_init);
2938
2939 static const struct tty_operations con_ops = {
2940 .open = con_open,
2941 .close = con_close,
2942 .write = con_write,
2943 .write_room = con_write_room,
2944 .put_char = con_put_char,
2945 .flush_chars = con_flush_chars,
2946 .chars_in_buffer = con_chars_in_buffer,
2947 .ioctl = vt_ioctl,
2948 .stop = con_stop,
2949 .start = con_start,
2950 .throttle = con_throttle,
2951 .unthrottle = con_unthrottle,
2952 .resize = vt_resize,
2953 };
2954
2955 int __init vty_init(void)
2956 {
2957 vcs_init();
2958
2959 console_driver = alloc_tty_driver(MAX_NR_CONSOLES);
2960 if (!console_driver)
2961 panic("Couldn't allocate console driver\n");
2962 console_driver->owner = THIS_MODULE;
2963 console_driver->name = "tty";
2964 console_driver->name_base = 1;
2965 console_driver->major = TTY_MAJOR;
2966 console_driver->minor_start = 1;
2967 console_driver->type = TTY_DRIVER_TYPE_CONSOLE;
2968 console_driver->init_termios = tty_std_termios;
2969 if (default_utf8)
2970 console_driver->init_termios.c_iflag |= IUTF8;
2971 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS;
2972 tty_set_operations(console_driver, &con_ops);
2973 if (tty_register_driver(console_driver))
2974 panic("Couldn't register console driver\n");
2975
2976 kbd_init();
2977 console_map_init();
2978 #ifdef CONFIG_PROM_CONSOLE
2979 prom_con_init();
2980 #endif
2981 #ifdef CONFIG_MDA_CONSOLE
2982 mda_console_init();
2983 #endif
2984 return 0;
2985 }
2986
2987 #ifndef VT_SINGLE_DRIVER
2988 #include <linux/device.h>
2989
2990 static struct class *vtconsole_class;
2991
2992 static int bind_con_driver(const struct consw *csw, int first, int last,
2993 int deflt)
2994 {
2995 struct module *owner = csw->owner;
2996 const char *desc = NULL;
2997 struct con_driver *con_driver;
2998 int i, j = -1, k = -1, retval = -ENODEV;
2999
3000 if (!try_module_get(owner))
3001 return -ENODEV;
3002
3003 acquire_console_sem();
3004
3005 /* check if driver is registered */
3006 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3007 con_driver = &registered_con_driver[i];
3008
3009 if (con_driver->con == csw) {
3010 desc = con_driver->desc;
3011 retval = 0;
3012 break;
3013 }
3014 }
3015
3016 if (retval)
3017 goto err;
3018
3019 if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) {
3020 csw->con_startup();
3021 con_driver->flag |= CON_DRIVER_FLAG_INIT;
3022 }
3023
3024 if (deflt) {
3025 if (conswitchp)
3026 module_put(conswitchp->owner);
3027
3028 __module_get(owner);
3029 conswitchp = csw;
3030 }
3031
3032 first = max(first, con_driver->first);
3033 last = min(last, con_driver->last);
3034
3035 for (i = first; i <= last; i++) {
3036 int old_was_color;
3037 struct vc_data *vc = vc_cons[i].d;
3038
3039 if (con_driver_map[i])
3040 module_put(con_driver_map[i]->owner);
3041 __module_get(owner);
3042 con_driver_map[i] = csw;
3043
3044 if (!vc || !vc->vc_sw)
3045 continue;
3046
3047 j = i;
3048
3049 if (CON_IS_VISIBLE(vc)) {
3050 k = i;
3051 save_screen(vc);
3052 }
3053
3054 old_was_color = vc->vc_can_do_color;
3055 vc->vc_sw->con_deinit(vc);
3056 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
3057 visual_init(vc, i, 0);
3058 set_origin(vc);
3059 update_attr(vc);
3060
3061 /* If the console changed between mono <-> color, then
3062 * the attributes in the screenbuf will be wrong. The
3063 * following resets all attributes to something sane.
3064 */
3065 if (old_was_color != vc->vc_can_do_color)
3066 clear_buffer_attributes(vc);
3067 }
3068
3069 printk("Console: switching ");
3070 if (!deflt)
3071 printk("consoles %d-%d ", first+1, last+1);
3072 if (j >= 0) {
3073 struct vc_data *vc = vc_cons[j].d;
3074
3075 printk("to %s %s %dx%d\n",
3076 vc->vc_can_do_color ? "colour" : "mono",
3077 desc, vc->vc_cols, vc->vc_rows);
3078
3079 if (k >= 0) {
3080 vc = vc_cons[k].d;
3081 update_screen(vc);
3082 }
3083 } else
3084 printk("to %s\n", desc);
3085
3086 retval = 0;
3087 err:
3088 release_console_sem();
3089 module_put(owner);
3090 return retval;
3091 };
3092
3093 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
3094 static int con_is_graphics(const struct consw *csw, int first, int last)
3095 {
3096 int i, retval = 0;
3097
3098 for (i = first; i <= last; i++) {
3099 struct vc_data *vc = vc_cons[i].d;
3100
3101 if (vc && vc->vc_mode == KD_GRAPHICS) {
3102 retval = 1;
3103 break;
3104 }
3105 }
3106
3107 return retval;
3108 }
3109
3110 /**
3111 * unbind_con_driver - unbind a console driver
3112 * @csw: pointer to console driver to unregister
3113 * @first: first in range of consoles that @csw should be unbound from
3114 * @last: last in range of consoles that @csw should be unbound from
3115 * @deflt: should next bound console driver be default after @csw is unbound?
3116 *
3117 * To unbind a driver from all possible consoles, pass 0 as @first and
3118 * %MAX_NR_CONSOLES as @last.
3119 *
3120 * @deflt controls whether the console that ends up replacing @csw should be
3121 * the default console.
3122 *
3123 * RETURNS:
3124 * -ENODEV if @csw isn't a registered console driver or can't be unregistered
3125 * or 0 on success.
3126 */
3127 int unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
3128 {
3129 struct module *owner = csw->owner;
3130 const struct consw *defcsw = NULL;
3131 struct con_driver *con_driver = NULL, *con_back = NULL;
3132 int i, retval = -ENODEV;
3133
3134 if (!try_module_get(owner))
3135 return -ENODEV;
3136
3137 acquire_console_sem();
3138
3139 /* check if driver is registered and if it is unbindable */
3140 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3141 con_driver = &registered_con_driver[i];
3142
3143 if (con_driver->con == csw &&
3144 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3145 retval = 0;
3146 break;
3147 }
3148 }
3149
3150 if (retval) {
3151 release_console_sem();
3152 goto err;
3153 }
3154
3155 retval = -ENODEV;
3156
3157 /* check if backup driver exists */
3158 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3159 con_back = &registered_con_driver[i];
3160
3161 if (con_back->con &&
3162 !(con_back->flag & CON_DRIVER_FLAG_MODULE)) {
3163 defcsw = con_back->con;
3164 retval = 0;
3165 break;
3166 }
3167 }
3168
3169 if (retval) {
3170 release_console_sem();
3171 goto err;
3172 }
3173
3174 if (!con_is_bound(csw)) {
3175 release_console_sem();
3176 goto err;
3177 }
3178
3179 first = max(first, con_driver->first);
3180 last = min(last, con_driver->last);
3181
3182 for (i = first; i <= last; i++) {
3183 if (con_driver_map[i] == csw) {
3184 module_put(csw->owner);
3185 con_driver_map[i] = NULL;
3186 }
3187 }
3188
3189 if (!con_is_bound(defcsw)) {
3190 const struct consw *defconsw = conswitchp;
3191
3192 defcsw->con_startup();
3193 con_back->flag |= CON_DRIVER_FLAG_INIT;
3194 /*
3195 * vgacon may change the default driver to point
3196 * to dummycon, we restore it here...
3197 */
3198 conswitchp = defconsw;
3199 }
3200
3201 if (!con_is_bound(csw))
3202 con_driver->flag &= ~CON_DRIVER_FLAG_INIT;
3203
3204 release_console_sem();
3205 /* ignore return value, binding should not fail */
3206 bind_con_driver(defcsw, first, last, deflt);
3207 err:
3208 module_put(owner);
3209 return retval;
3210
3211 }
3212 EXPORT_SYMBOL(unbind_con_driver);
3213
3214 static int vt_bind(struct con_driver *con)
3215 {
3216 const struct consw *defcsw = NULL, *csw = NULL;
3217 int i, more = 1, first = -1, last = -1, deflt = 0;
3218
3219 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3220 con_is_graphics(con->con, con->first, con->last))
3221 goto err;
3222
3223 csw = con->con;
3224
3225 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3226 struct con_driver *con = &registered_con_driver[i];
3227
3228 if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) {
3229 defcsw = con->con;
3230 break;
3231 }
3232 }
3233
3234 if (!defcsw)
3235 goto err;
3236
3237 while (more) {
3238 more = 0;
3239
3240 for (i = con->first; i <= con->last; i++) {
3241 if (con_driver_map[i] == defcsw) {
3242 if (first == -1)
3243 first = i;
3244 last = i;
3245 more = 1;
3246 } else if (first != -1)
3247 break;
3248 }
3249
3250 if (first == 0 && last == MAX_NR_CONSOLES -1)
3251 deflt = 1;
3252
3253 if (first != -1)
3254 bind_con_driver(csw, first, last, deflt);
3255
3256 first = -1;
3257 last = -1;
3258 deflt = 0;
3259 }
3260
3261 err:
3262 return 0;
3263 }
3264
3265 static int vt_unbind(struct con_driver *con)
3266 {
3267 const struct consw *csw = NULL;
3268 int i, more = 1, first = -1, last = -1, deflt = 0;
3269
3270 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3271 con_is_graphics(con->con, con->first, con->last))
3272 goto err;
3273
3274 csw = con->con;
3275
3276 while (more) {
3277 more = 0;
3278
3279 for (i = con->first; i <= con->last; i++) {
3280 if (con_driver_map[i] == csw) {
3281 if (first == -1)
3282 first = i;
3283 last = i;
3284 more = 1;
3285 } else if (first != -1)
3286 break;
3287 }
3288
3289 if (first == 0 && last == MAX_NR_CONSOLES -1)
3290 deflt = 1;
3291
3292 if (first != -1)
3293 unbind_con_driver(csw, first, last, deflt);
3294
3295 first = -1;
3296 last = -1;
3297 deflt = 0;
3298 }
3299
3300 err:
3301 return 0;
3302 }
3303 #else
3304 static inline int vt_bind(struct con_driver *con)
3305 {
3306 return 0;
3307 }
3308 static inline int vt_unbind(struct con_driver *con)
3309 {
3310 return 0;
3311 }
3312 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3313
3314 static ssize_t store_bind(struct device *dev, struct device_attribute *attr,
3315 const char *buf, size_t count)
3316 {
3317 struct con_driver *con = dev_get_drvdata(dev);
3318 int bind = simple_strtoul(buf, NULL, 0);
3319
3320 if (bind)
3321 vt_bind(con);
3322 else
3323 vt_unbind(con);
3324
3325 return count;
3326 }
3327
3328 static ssize_t show_bind(struct device *dev, struct device_attribute *attr,
3329 char *buf)
3330 {
3331 struct con_driver *con = dev_get_drvdata(dev);
3332 int bind = con_is_bound(con->con);
3333
3334 return snprintf(buf, PAGE_SIZE, "%i\n", bind);
3335 }
3336
3337 static ssize_t show_name(struct device *dev, struct device_attribute *attr,
3338 char *buf)
3339 {
3340 struct con_driver *con = dev_get_drvdata(dev);
3341
3342 return snprintf(buf, PAGE_SIZE, "%s %s\n",
3343 (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)",
3344 con->desc);
3345
3346 }
3347
3348 static struct device_attribute device_attrs[] = {
3349 __ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind),
3350 __ATTR(name, S_IRUGO, show_name, NULL),
3351 };
3352
3353 static int vtconsole_init_device(struct con_driver *con)
3354 {
3355 int i;
3356 int error = 0;
3357
3358 con->flag |= CON_DRIVER_FLAG_ATTR;
3359 dev_set_drvdata(con->dev, con);
3360 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3361 error = device_create_file(con->dev, &device_attrs[i]);
3362 if (error)
3363 break;
3364 }
3365
3366 if (error) {
3367 while (--i >= 0)
3368 device_remove_file(con->dev, &device_attrs[i]);
3369 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3370 }
3371
3372 return error;
3373 }
3374
3375 static void vtconsole_deinit_device(struct con_driver *con)
3376 {
3377 int i;
3378
3379 if (con->flag & CON_DRIVER_FLAG_ATTR) {
3380 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3381 device_remove_file(con->dev, &device_attrs[i]);
3382 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3383 }
3384 }
3385
3386 /**
3387 * con_is_bound - checks if driver is bound to the console
3388 * @csw: console driver
3389 *
3390 * RETURNS: zero if unbound, nonzero if bound
3391 *
3392 * Drivers can call this and if zero, they should release
3393 * all resources allocated on con_startup()
3394 */
3395 int con_is_bound(const struct consw *csw)
3396 {
3397 int i, bound = 0;
3398
3399 for (i = 0; i < MAX_NR_CONSOLES; i++) {
3400 if (con_driver_map[i] == csw) {
3401 bound = 1;
3402 break;
3403 }
3404 }
3405
3406 return bound;
3407 }
3408 EXPORT_SYMBOL(con_is_bound);
3409
3410 /**
3411 * register_con_driver - register console driver to console layer
3412 * @csw: console driver
3413 * @first: the first console to take over, minimum value is 0
3414 * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1
3415 *
3416 * DESCRIPTION: This function registers a console driver which can later
3417 * bind to a range of consoles specified by @first and @last. It will
3418 * also initialize the console driver by calling con_startup().
3419 */
3420 int register_con_driver(const struct consw *csw, int first, int last)
3421 {
3422 struct module *owner = csw->owner;
3423 struct con_driver *con_driver;
3424 const char *desc;
3425 int i, retval = 0;
3426
3427 if (!try_module_get(owner))
3428 return -ENODEV;
3429
3430 acquire_console_sem();
3431
3432 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3433 con_driver = &registered_con_driver[i];
3434
3435 /* already registered */
3436 if (con_driver->con == csw)
3437 retval = -EINVAL;
3438 }
3439
3440 if (retval)
3441 goto err;
3442
3443 desc = csw->con_startup();
3444
3445 if (!desc)
3446 goto err;
3447
3448 retval = -EINVAL;
3449
3450 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3451 con_driver = &registered_con_driver[i];
3452
3453 if (con_driver->con == NULL) {
3454 con_driver->con = csw;
3455 con_driver->desc = desc;
3456 con_driver->node = i;
3457 con_driver->flag = CON_DRIVER_FLAG_MODULE |
3458 CON_DRIVER_FLAG_INIT;
3459 con_driver->first = first;
3460 con_driver->last = last;
3461 retval = 0;
3462 break;
3463 }
3464 }
3465
3466 if (retval)
3467 goto err;
3468
3469 con_driver->dev = device_create_drvdata(vtconsole_class, NULL,
3470 MKDEV(0, con_driver->node),
3471 NULL, "vtcon%i",
3472 con_driver->node);
3473
3474 if (IS_ERR(con_driver->dev)) {
3475 printk(KERN_WARNING "Unable to create device for %s; "
3476 "errno = %ld\n", con_driver->desc,
3477 PTR_ERR(con_driver->dev));
3478 con_driver->dev = NULL;
3479 } else {
3480 vtconsole_init_device(con_driver);
3481 }
3482
3483 err:
3484 release_console_sem();
3485 module_put(owner);
3486 return retval;
3487 }
3488 EXPORT_SYMBOL(register_con_driver);
3489
3490 /**
3491 * unregister_con_driver - unregister console driver from console layer
3492 * @csw: console driver
3493 *
3494 * DESCRIPTION: All drivers that registers to the console layer must
3495 * call this function upon exit, or if the console driver is in a state
3496 * where it won't be able to handle console services, such as the
3497 * framebuffer console without loaded framebuffer drivers.
3498 *
3499 * The driver must unbind first prior to unregistration.
3500 */
3501 int unregister_con_driver(const struct consw *csw)
3502 {
3503 int i, retval = -ENODEV;
3504
3505 acquire_console_sem();
3506
3507 /* cannot unregister a bound driver */
3508 if (con_is_bound(csw))
3509 goto err;
3510
3511 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3512 struct con_driver *con_driver = &registered_con_driver[i];
3513
3514 if (con_driver->con == csw &&
3515 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3516 vtconsole_deinit_device(con_driver);
3517 device_destroy(vtconsole_class,
3518 MKDEV(0, con_driver->node));
3519 con_driver->con = NULL;
3520 con_driver->desc = NULL;
3521 con_driver->dev = NULL;
3522 con_driver->node = 0;
3523 con_driver->flag = 0;
3524 con_driver->first = 0;
3525 con_driver->last = 0;
3526 retval = 0;
3527 break;
3528 }
3529 }
3530 err:
3531 release_console_sem();
3532 return retval;
3533 }
3534 EXPORT_SYMBOL(unregister_con_driver);
3535
3536 /*
3537 * If we support more console drivers, this function is used
3538 * when a driver wants to take over some existing consoles
3539 * and become default driver for newly opened ones.
3540 *
3541 * take_over_console is basically a register followed by unbind
3542 */
3543 int take_over_console(const struct consw *csw, int first, int last, int deflt)
3544 {
3545 int err;
3546
3547 err = register_con_driver(csw, first, last);
3548
3549 if (!err)
3550 bind_con_driver(csw, first, last, deflt);
3551
3552 return err;
3553 }
3554
3555 /*
3556 * give_up_console is a wrapper to unregister_con_driver. It will only
3557 * work if driver is fully unbound.
3558 */
3559 void give_up_console(const struct consw *csw)
3560 {
3561 unregister_con_driver(csw);
3562 }
3563
3564 static int __init vtconsole_class_init(void)
3565 {
3566 int i;
3567
3568 vtconsole_class = class_create(THIS_MODULE, "vtconsole");
3569 if (IS_ERR(vtconsole_class)) {
3570 printk(KERN_WARNING "Unable to create vt console class; "
3571 "errno = %ld\n", PTR_ERR(vtconsole_class));
3572 vtconsole_class = NULL;
3573 }
3574
3575 /* Add system drivers to sysfs */
3576 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3577 struct con_driver *con = &registered_con_driver[i];
3578
3579 if (con->con && !con->dev) {
3580 con->dev = device_create_drvdata(vtconsole_class, NULL,
3581 MKDEV(0, con->node),
3582 NULL, "vtcon%i",
3583 con->node);
3584
3585 if (IS_ERR(con->dev)) {
3586 printk(KERN_WARNING "Unable to create "
3587 "device for %s; errno = %ld\n",
3588 con->desc, PTR_ERR(con->dev));
3589 con->dev = NULL;
3590 } else {
3591 vtconsole_init_device(con);
3592 }
3593 }
3594 }
3595
3596 return 0;
3597 }
3598 postcore_initcall(vtconsole_class_init);
3599
3600 #endif
3601
3602 /*
3603 * Screen blanking
3604 */
3605
3606 static int set_vesa_blanking(char __user *p)
3607 {
3608 unsigned int mode;
3609
3610 if (get_user(mode, p + 1))
3611 return -EFAULT;
3612
3613 vesa_blank_mode = (mode < 4) ? mode : 0;
3614 return 0;
3615 }
3616
3617 void do_blank_screen(int entering_gfx)
3618 {
3619 struct vc_data *vc = vc_cons[fg_console].d;
3620 int i;
3621
3622 WARN_CONSOLE_UNLOCKED();
3623
3624 if (console_blanked) {
3625 if (blank_state == blank_vesa_wait) {
3626 blank_state = blank_off;
3627 vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0);
3628 }
3629 return;
3630 }
3631
3632 /* entering graphics mode? */
3633 if (entering_gfx) {
3634 hide_cursor(vc);
3635 save_screen(vc);
3636 vc->vc_sw->con_blank(vc, -1, 1);
3637 console_blanked = fg_console + 1;
3638 blank_state = blank_off;
3639 set_origin(vc);
3640 return;
3641 }
3642
3643 if (blank_state != blank_normal_wait)
3644 return;
3645 blank_state = blank_off;
3646
3647 /* don't blank graphics */
3648 if (vc->vc_mode != KD_TEXT) {
3649 console_blanked = fg_console + 1;
3650 return;
3651 }
3652
3653 hide_cursor(vc);
3654 del_timer_sync(&console_timer);
3655 blank_timer_expired = 0;
3656
3657 save_screen(vc);
3658 /* In case we need to reset origin, blanking hook returns 1 */
3659 i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0);
3660 console_blanked = fg_console + 1;
3661 if (i)
3662 set_origin(vc);
3663
3664 if (console_blank_hook && console_blank_hook(1))
3665 return;
3666
3667 if (vesa_off_interval && vesa_blank_mode) {
3668 blank_state = blank_vesa_wait;
3669 mod_timer(&console_timer, jiffies + vesa_off_interval);
3670 }
3671 }
3672 EXPORT_SYMBOL(do_blank_screen);
3673
3674 /*
3675 * Called by timer as well as from vt_console_driver
3676 */
3677 void do_unblank_screen(int leaving_gfx)
3678 {
3679 struct vc_data *vc;
3680
3681 /* This should now always be called from a "sane" (read: can schedule)
3682 * context for the sake of the low level drivers, except in the special
3683 * case of oops_in_progress
3684 */
3685 if (!oops_in_progress)
3686 might_sleep();
3687
3688 WARN_CONSOLE_UNLOCKED();
3689
3690 ignore_poke = 0;
3691 if (!console_blanked)
3692 return;
3693 if (!vc_cons_allocated(fg_console)) {
3694 /* impossible */
3695 printk("unblank_screen: tty %d not allocated ??\n", fg_console+1);
3696 return;
3697 }
3698 vc = vc_cons[fg_console].d;
3699 if (vc->vc_mode != KD_TEXT)
3700 return; /* but leave console_blanked != 0 */
3701
3702 if (blankinterval) {
3703 mod_timer(&console_timer, jiffies + blankinterval);
3704 blank_state = blank_normal_wait;
3705 }
3706
3707 console_blanked = 0;
3708 if (vc->vc_sw->con_blank(vc, 0, leaving_gfx))
3709 /* Low-level driver cannot restore -> do it ourselves */
3710 update_screen(vc);
3711 if (console_blank_hook)
3712 console_blank_hook(0);
3713 set_palette(vc);
3714 set_cursor(vc);
3715 }
3716 EXPORT_SYMBOL(do_unblank_screen);
3717
3718 /*
3719 * This is called by the outside world to cause a forced unblank, mostly for
3720 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
3721 * call it with 1 as an argument and so force a mode restore... that may kill
3722 * X or at least garbage the screen but would also make the Oops visible...
3723 */
3724 void unblank_screen(void)
3725 {
3726 do_unblank_screen(0);
3727 }
3728
3729 /*
3730 * We defer the timer blanking to work queue so it can take the console mutex
3731 * (console operations can still happen at irq time, but only from printk which
3732 * has the console mutex. Not perfect yet, but better than no locking
3733 */
3734 static void blank_screen_t(unsigned long dummy)
3735 {
3736 if (unlikely(!keventd_up())) {
3737 mod_timer(&console_timer, jiffies + blankinterval);
3738 return;
3739 }
3740 blank_timer_expired = 1;
3741 schedule_work(&console_work);
3742 }
3743
3744 void poke_blanked_console(void)
3745 {
3746 WARN_CONSOLE_UNLOCKED();
3747
3748 /* Add this so we quickly catch whoever might call us in a non
3749 * safe context. Nowadays, unblank_screen() isn't to be called in
3750 * atomic contexts and is allowed to schedule (with the special case
3751 * of oops_in_progress, but that isn't of any concern for this
3752 * function. --BenH.
3753 */
3754 might_sleep();
3755
3756 /* This isn't perfectly race free, but a race here would be mostly harmless,
3757 * at worse, we'll do a spurrious blank and it's unlikely
3758 */
3759 del_timer(&console_timer);
3760 blank_timer_expired = 0;
3761
3762 if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS)
3763 return;
3764 if (console_blanked)
3765 unblank_screen();
3766 else if (blankinterval) {
3767 mod_timer(&console_timer, jiffies + blankinterval);
3768 blank_state = blank_normal_wait;
3769 }
3770 }
3771
3772 /*
3773 * Palettes
3774 */
3775
3776 static void set_palette(struct vc_data *vc)
3777 {
3778 WARN_CONSOLE_UNLOCKED();
3779
3780 if (vc->vc_mode != KD_GRAPHICS)
3781 vc->vc_sw->con_set_palette(vc, color_table);
3782 }
3783
3784 static int set_get_cmap(unsigned char __user *arg, int set)
3785 {
3786 int i, j, k;
3787
3788 WARN_CONSOLE_UNLOCKED();
3789
3790 for (i = 0; i < 16; i++)
3791 if (set) {
3792 get_user(default_red[i], arg++);
3793 get_user(default_grn[i], arg++);
3794 get_user(default_blu[i], arg++);
3795 } else {
3796 put_user(default_red[i], arg++);
3797 put_user(default_grn[i], arg++);
3798 put_user(default_blu[i], arg++);
3799 }
3800 if (set) {
3801 for (i = 0; i < MAX_NR_CONSOLES; i++)
3802 if (vc_cons_allocated(i)) {
3803 for (j = k = 0; j < 16; j++) {
3804 vc_cons[i].d->vc_palette[k++] = default_red[j];
3805 vc_cons[i].d->vc_palette[k++] = default_grn[j];
3806 vc_cons[i].d->vc_palette[k++] = default_blu[j];
3807 }
3808 set_palette(vc_cons[i].d);
3809 }
3810 }
3811 return 0;
3812 }
3813
3814 /*
3815 * Load palette into the DAC registers. arg points to a colour
3816 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
3817 */
3818
3819 int con_set_cmap(unsigned char __user *arg)
3820 {
3821 int rc;
3822
3823 acquire_console_sem();
3824 rc = set_get_cmap (arg,1);
3825 release_console_sem();
3826
3827 return rc;
3828 }
3829
3830 int con_get_cmap(unsigned char __user *arg)
3831 {
3832 int rc;
3833
3834 acquire_console_sem();
3835 rc = set_get_cmap (arg,0);
3836 release_console_sem();
3837
3838 return rc;
3839 }
3840
3841 void reset_palette(struct vc_data *vc)
3842 {
3843 int j, k;
3844 for (j=k=0; j<16; j++) {
3845 vc->vc_palette[k++] = default_red[j];
3846 vc->vc_palette[k++] = default_grn[j];
3847 vc->vc_palette[k++] = default_blu[j];
3848 }
3849 set_palette(vc);
3850 }
3851
3852 /*
3853 * Font switching
3854 *
3855 * Currently we only support fonts up to 32 pixels wide, at a maximum height
3856 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
3857 * depending on width) reserved for each character which is kinda wasty, but
3858 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
3859 * is upto the actual low-level console-driver convert data into its favorite
3860 * format (maybe we should add a `fontoffset' field to the `display'
3861 * structure so we won't have to convert the fontdata all the time.
3862 * /Jes
3863 */
3864
3865 #define max_font_size 65536
3866
3867 static int con_font_get(struct vc_data *vc, struct console_font_op *op)
3868 {
3869 struct console_font font;
3870 int rc = -EINVAL;
3871 int c;
3872
3873 if (vc->vc_mode != KD_TEXT)
3874 return -EINVAL;
3875
3876 if (op->data) {
3877 font.data = kmalloc(max_font_size, GFP_KERNEL);
3878 if (!font.data)
3879 return -ENOMEM;
3880 } else
3881 font.data = NULL;
3882
3883 acquire_console_sem();
3884 if (vc->vc_sw->con_font_get)
3885 rc = vc->vc_sw->con_font_get(vc, &font);
3886 else
3887 rc = -ENOSYS;
3888 release_console_sem();
3889
3890 if (rc)
3891 goto out;
3892
3893 c = (font.width+7)/8 * 32 * font.charcount;
3894
3895 if (op->data && font.charcount > op->charcount)
3896 rc = -ENOSPC;
3897 if (!(op->flags & KD_FONT_FLAG_OLD)) {
3898 if (font.width > op->width || font.height > op->height)
3899 rc = -ENOSPC;
3900 } else {
3901 if (font.width != 8)
3902 rc = -EIO;
3903 else if ((op->height && font.height > op->height) ||
3904 font.height > 32)
3905 rc = -ENOSPC;
3906 }
3907 if (rc)
3908 goto out;
3909
3910 op->height = font.height;
3911 op->width = font.width;
3912 op->charcount = font.charcount;
3913
3914 if (op->data && copy_to_user(op->data, font.data, c))
3915 rc = -EFAULT;
3916
3917 out:
3918 kfree(font.data);
3919 return rc;
3920 }
3921
3922 static int con_font_set(struct vc_data *vc, struct console_font_op *op)
3923 {
3924 struct console_font font;
3925 int rc = -EINVAL;
3926 int size;
3927
3928 if (vc->vc_mode != KD_TEXT)
3929 return -EINVAL;
3930 if (!op->data)
3931 return -EINVAL;
3932 if (op->charcount > 512)
3933 return -EINVAL;
3934 if (!op->height) { /* Need to guess font height [compat] */
3935 int h, i;
3936 u8 __user *charmap = op->data;
3937 u8 tmp;
3938
3939 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
3940 so that we can get rid of this soon */
3941 if (!(op->flags & KD_FONT_FLAG_OLD))
3942 return -EINVAL;
3943 for (h = 32; h > 0; h--)
3944 for (i = 0; i < op->charcount; i++) {
3945 if (get_user(tmp, &charmap[32*i+h-1]))
3946 return -EFAULT;
3947 if (tmp)
3948 goto nonzero;
3949 }
3950 return -EINVAL;
3951 nonzero:
3952 op->height = h;
3953 }
3954 if (op->width <= 0 || op->width > 32 || op->height > 32)
3955 return -EINVAL;
3956 size = (op->width+7)/8 * 32 * op->charcount;
3957 if (size > max_font_size)
3958 return -ENOSPC;
3959 font.charcount = op->charcount;
3960 font.height = op->height;
3961 font.width = op->width;
3962 font.data = kmalloc(size, GFP_KERNEL);
3963 if (!font.data)
3964 return -ENOMEM;
3965 if (copy_from_user(font.data, op->data, size)) {
3966 kfree(font.data);
3967 return -EFAULT;
3968 }
3969 acquire_console_sem();
3970 if (vc->vc_sw->con_font_set)
3971 rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
3972 else
3973 rc = -ENOSYS;
3974 release_console_sem();
3975 kfree(font.data);
3976 return rc;
3977 }
3978
3979 static int con_font_default(struct vc_data *vc, struct console_font_op *op)
3980 {
3981 struct console_font font = {.width = op->width, .height = op->height};
3982 char name[MAX_FONT_NAME];
3983 char *s = name;
3984 int rc;
3985
3986 if (vc->vc_mode != KD_TEXT)
3987 return -EINVAL;
3988
3989 if (!op->data)
3990 s = NULL;
3991 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0)
3992 return -EFAULT;
3993 else
3994 name[MAX_FONT_NAME - 1] = 0;
3995
3996 acquire_console_sem();
3997 if (vc->vc_sw->con_font_default)
3998 rc = vc->vc_sw->con_font_default(vc, &font, s);
3999 else
4000 rc = -ENOSYS;
4001 release_console_sem();
4002 if (!rc) {
4003 op->width = font.width;
4004 op->height = font.height;
4005 }
4006 return rc;
4007 }
4008
4009 static int con_font_copy(struct vc_data *vc, struct console_font_op *op)
4010 {
4011 int con = op->height;
4012 int rc;
4013
4014 if (vc->vc_mode != KD_TEXT)
4015 return -EINVAL;
4016
4017 acquire_console_sem();
4018 if (!vc->vc_sw->con_font_copy)
4019 rc = -ENOSYS;
4020 else if (con < 0 || !vc_cons_allocated(con))
4021 rc = -ENOTTY;
4022 else if (con == vc->vc_num) /* nothing to do */
4023 rc = 0;
4024 else
4025 rc = vc->vc_sw->con_font_copy(vc, con);
4026 release_console_sem();
4027 return rc;
4028 }
4029
4030 int con_font_op(struct vc_data *vc, struct console_font_op *op)
4031 {
4032 switch (op->op) {
4033 case KD_FONT_OP_SET:
4034 return con_font_set(vc, op);
4035 case KD_FONT_OP_GET:
4036 return con_font_get(vc, op);
4037 case KD_FONT_OP_SET_DEFAULT:
4038 return con_font_default(vc, op);
4039 case KD_FONT_OP_COPY:
4040 return con_font_copy(vc, op);
4041 }
4042 return -ENOSYS;
4043 }
4044
4045 /*
4046 * Interface exported to selection and vcs.
4047 */
4048
4049 /* used by selection */
4050 u16 screen_glyph(struct vc_data *vc, int offset)
4051 {
4052 u16 w = scr_readw(screenpos(vc, offset, 1));
4053 u16 c = w & 0xff;
4054
4055 if (w & vc->vc_hi_font_mask)
4056 c |= 0x100;
4057 return c;
4058 }
4059 EXPORT_SYMBOL_GPL(screen_glyph);
4060
4061 /* used by vcs - note the word offset */
4062 unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed)
4063 {
4064 return screenpos(vc, 2 * w_offset, viewed);
4065 }
4066
4067 void getconsxy(struct vc_data *vc, unsigned char *p)
4068 {
4069 p[0] = vc->vc_x;
4070 p[1] = vc->vc_y;
4071 }
4072
4073 void putconsxy(struct vc_data *vc, unsigned char *p)
4074 {
4075 hide_cursor(vc);
4076 gotoxy(vc, p[0], p[1]);
4077 set_cursor(vc);
4078 }
4079
4080 u16 vcs_scr_readw(struct vc_data *vc, const u16 *org)
4081 {
4082 if ((unsigned long)org == vc->vc_pos && softcursor_original != -1)
4083 return softcursor_original;
4084 return scr_readw(org);
4085 }
4086
4087 void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org)
4088 {
4089 scr_writew(val, org);
4090 if ((unsigned long)org == vc->vc_pos) {
4091 softcursor_original = -1;
4092 add_softcursor(vc);
4093 }
4094 }
4095
4096 /*
4097 * Visible symbols for modules
4098 */
4099
4100 EXPORT_SYMBOL(color_table);
4101 EXPORT_SYMBOL(default_red);
4102 EXPORT_SYMBOL(default_grn);
4103 EXPORT_SYMBOL(default_blu);
4104 EXPORT_SYMBOL(update_region);
4105 EXPORT_SYMBOL(redraw_screen);
4106 EXPORT_SYMBOL(vc_resize);
4107 EXPORT_SYMBOL(fg_console);
4108 EXPORT_SYMBOL(console_blank_hook);
4109 EXPORT_SYMBOL(console_blanked);
4110 EXPORT_SYMBOL(vc_cons);
4111 #ifndef VT_SINGLE_DRIVER
4112 EXPORT_SYMBOL(take_over_console);
4113 EXPORT_SYMBOL(give_up_console);
4114 #endif
linux 2.6 git repository for openrd