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md: Fix unfortunate interaction with evms
[linux-2.6/mini2440.git] / drivers / char / vt.c
blob6aa88f50b0397a36be2720c4555a65d6b96fae2d
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
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/smp_lock.h>
93 #include <linux/tiocl.h>
94 #include <linux/kbd_kern.h>
95 #include <linux/consolemap.h>
96 #include <linux/timer.h>
97 #include <linux/interrupt.h>
98 #include <linux/workqueue.h>
99 #include <linux/pm.h>
100 #include <linux/font.h>
101 #include <linux/bitops.h>
102 #include <linux/notifier.h>
103 #include <linux/device.h>
104 #include <linux/io.h>
105 #include <asm/system.h>
106 #include <linux/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 vesa_off_interval;
176 static int blankinterval = 10*60;
177 core_param(consoleblank, blankinterval, int, 0444);
178
179 static DECLARE_WORK(console_work, console_callback);
180
181 /*
182 * fg_console is the current virtual console,
183 * last_console is the last used one,
184 * want_console is the console we want to switch to,
185 * kmsg_redirect is the console for kernel messages,
186 */
187 int fg_console;
188 int last_console;
189 int want_console = -1;
190 int kmsg_redirect;
191
192 /*
193 * For each existing display, we have a pointer to console currently visible
194 * on that display, allowing consoles other than fg_console to be refreshed
195 * appropriately. Unless the low-level driver supplies its own display_fg
196 * variable, we use this one for the "master display".
197 */
198 static struct vc_data *master_display_fg;
199
200 /*
201 * Unfortunately, we need to delay tty echo when we're currently writing to the
202 * console since the code is (and always was) not re-entrant, so we schedule
203 * all flip requests to process context with schedule-task() and run it from
204 * console_callback().
205 */
206
207 /*
208 * For the same reason, we defer scrollback to the console callback.
209 */
210 static int scrollback_delta;
211
212 /*
213 * Hook so that the power management routines can (un)blank
214 * the console on our behalf.
215 */
216 int (*console_blank_hook)(int);
217
218 static DEFINE_TIMER(console_timer, blank_screen_t, 0, 0);
219 static int blank_state;
220 static int blank_timer_expired;
221 enum {
222 blank_off = 0,
223 blank_normal_wait,
224 blank_vesa_wait,
225 };
226
227 /*
228 * Notifier list for console events.
229 */
230 static ATOMIC_NOTIFIER_HEAD(vt_notifier_list);
231
232 int register_vt_notifier(struct notifier_block *nb)
233 {
234 return atomic_notifier_chain_register(&vt_notifier_list, nb);
235 }
236 EXPORT_SYMBOL_GPL(register_vt_notifier);
237
238 int unregister_vt_notifier(struct notifier_block *nb)
239 {
240 return atomic_notifier_chain_unregister(&vt_notifier_list, nb);
241 }
242 EXPORT_SYMBOL_GPL(unregister_vt_notifier);
243
244 static void notify_write(struct vc_data *vc, unsigned int unicode)
245 {
246 struct vt_notifier_param param = { .vc = vc, unicode = unicode };
247 atomic_notifier_call_chain(&vt_notifier_list, VT_WRITE, &param);
248 }
249
250 static void notify_update(struct vc_data *vc)
251 {
252 struct vt_notifier_param param = { .vc = vc };
253 atomic_notifier_call_chain(&vt_notifier_list, VT_UPDATE, &param);
254 }
255
256 /*
257 * Low-Level Functions
258 */
259
260 #define IS_FG(vc) ((vc)->vc_num == fg_console)
261
262 #ifdef VT_BUF_VRAM_ONLY
263 #define DO_UPDATE(vc) 0
264 #else
265 #define DO_UPDATE(vc) (CON_IS_VISIBLE(vc) && !console_blanked)
266 #endif
267
268 static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed)
269 {
270 unsigned short *p;
271
272 if (!viewed)
273 p = (unsigned short *)(vc->vc_origin + offset);
274 else if (!vc->vc_sw->con_screen_pos)
275 p = (unsigned short *)(vc->vc_visible_origin + offset);
276 else
277 p = vc->vc_sw->con_screen_pos(vc, offset);
278 return p;
279 }
280
281 static inline void scrolldelta(int lines)
282 {
283 scrollback_delta += lines;
284 schedule_console_callback();
285 }
286
287 void schedule_console_callback(void)
288 {
289 schedule_work(&console_work);
290 }
291
292 static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
293 {
294 unsigned short *d, *s;
295
296 if (t+nr >= b)
297 nr = b - t - 1;
298 if (b > vc->vc_rows || t >= b || nr < 1)
299 return;
300 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr))
301 return;
302 d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
303 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr));
304 scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row);
305 scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_video_erase_char,
306 vc->vc_size_row * nr);
307 }
308
309 static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
310 {
311 unsigned short *s;
312 unsigned int step;
313
314 if (t+nr >= b)
315 nr = b - t - 1;
316 if (b > vc->vc_rows || t >= b || nr < 1)
317 return;
318 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr))
319 return;
320 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
321 step = vc->vc_cols * nr;
322 scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row);
323 scr_memsetw(s, vc->vc_video_erase_char, 2 * step);
324 }
325
326 static void do_update_region(struct vc_data *vc, unsigned long start, int count)
327 {
328 #ifndef VT_BUF_VRAM_ONLY
329 unsigned int xx, yy, offset;
330 u16 *p;
331
332 p = (u16 *) start;
333 if (!vc->vc_sw->con_getxy) {
334 offset = (start - vc->vc_origin) / 2;
335 xx = offset % vc->vc_cols;
336 yy = offset / vc->vc_cols;
337 } else {
338 int nxx, nyy;
339 start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy);
340 xx = nxx; yy = nyy;
341 }
342 for(;;) {
343 u16 attrib = scr_readw(p) & 0xff00;
344 int startx = xx;
345 u16 *q = p;
346 while (xx < vc->vc_cols && count) {
347 if (attrib != (scr_readw(p) & 0xff00)) {
348 if (p > q)
349 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
350 startx = xx;
351 q = p;
352 attrib = scr_readw(p) & 0xff00;
353 }
354 p++;
355 xx++;
356 count--;
357 }
358 if (p > q)
359 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
360 if (!count)
361 break;
362 xx = 0;
363 yy++;
364 if (vc->vc_sw->con_getxy) {
365 p = (u16 *)start;
366 start = vc->vc_sw->con_getxy(vc, start, NULL, NULL);
367 }
368 }
369 #endif
370 }
371
372 void update_region(struct vc_data *vc, unsigned long start, int count)
373 {
374 WARN_CONSOLE_UNLOCKED();
375
376 if (DO_UPDATE(vc)) {
377 hide_cursor(vc);
378 do_update_region(vc, start, count);
379 set_cursor(vc);
380 }
381 }
382
383 /* Structure of attributes is hardware-dependent */
384
385 static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink,
386 u8 _underline, u8 _reverse, u8 _italic)
387 {
388 if (vc->vc_sw->con_build_attr)
389 return vc->vc_sw->con_build_attr(vc, _color, _intensity,
390 _blink, _underline, _reverse, _italic);
391
392 #ifndef VT_BUF_VRAM_ONLY
393 /*
394 * ++roman: I completely changed the attribute format for monochrome
395 * mode (!can_do_color). The formerly used MDA (monochrome display
396 * adapter) format didn't allow the combination of certain effects.
397 * Now the attribute is just a bit vector:
398 * Bit 0..1: intensity (0..2)
399 * Bit 2 : underline
400 * Bit 3 : reverse
401 * Bit 7 : blink
402 */
403 {
404 u8 a = _color;
405 if (!vc->vc_can_do_color)
406 return _intensity |
407 (_italic ? 2 : 0) |
408 (_underline ? 4 : 0) |
409 (_reverse ? 8 : 0) |
410 (_blink ? 0x80 : 0);
411 if (_italic)
412 a = (a & 0xF0) | vc->vc_itcolor;
413 else if (_underline)
414 a = (a & 0xf0) | vc->vc_ulcolor;
415 else if (_intensity == 0)
416 a = (a & 0xf0) | vc->vc_ulcolor;
417 if (_reverse)
418 a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77);
419 if (_blink)
420 a ^= 0x80;
421 if (_intensity == 2)
422 a ^= 0x08;
423 if (vc->vc_hi_font_mask == 0x100)
424 a <<= 1;
425 return a;
426 }
427 #else
428 return 0;
429 #endif
430 }
431
432 static void update_attr(struct vc_data *vc)
433 {
434 vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity,
435 vc->vc_blink, vc->vc_underline,
436 vc->vc_reverse ^ vc->vc_decscnm, vc->vc_italic);
437 vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm, 0) << 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 vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL);
774 if (!vc->vc_screenbuf) {
775 kfree(vc);
776 vc_cons[currcons].d = NULL;
777 return -ENOMEM;
778 }
779 vc_init(vc, vc->vc_rows, vc->vc_cols, 1);
780 vcs_make_sysfs(currcons);
781 atomic_notifier_call_chain(&vt_notifier_list, VT_ALLOCATE, &param);
782 }
783 return 0;
784 }
785
786 static inline int resize_screen(struct vc_data *vc, int width, int height,
787 int user)
788 {
789 /* Resizes the resolution of the display adapater */
790 int err = 0;
791
792 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize)
793 err = vc->vc_sw->con_resize(vc, width, height, user);
794
795 return err;
796 }
797
798 /*
799 * Change # of rows and columns (0 means unchanged/the size of fg_console)
800 * [this is to be used together with some user program
801 * like resize that changes the hardware videomode]
802 */
803 #define VC_RESIZE_MAXCOL (32767)
804 #define VC_RESIZE_MAXROW (32767)
805
806 /**
807 * vc_do_resize - resizing method for the tty
808 * @tty: tty being resized
809 * @real_tty: real tty (different to tty if a pty/tty pair)
810 * @vc: virtual console private data
811 * @cols: columns
812 * @lines: lines
813 *
814 * Resize a virtual console, clipping according to the actual constraints.
815 * If the caller passes a tty structure then update the termios winsize
816 * information and perform any neccessary signal handling.
817 *
818 * Caller must hold the console semaphore. Takes the termios mutex and
819 * ctrl_lock of the tty IFF a tty is passed.
820 */
821
822 static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc,
823 unsigned int cols, unsigned int lines)
824 {
825 unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0;
826 unsigned int old_cols, old_rows, old_row_size, old_screen_size;
827 unsigned int new_cols, new_rows, new_row_size, new_screen_size;
828 unsigned int end, user;
829 unsigned short *newscreen;
830
831 WARN_CONSOLE_UNLOCKED();
832
833 if (!vc)
834 return -ENXIO;
835
836 user = vc->vc_resize_user;
837 vc->vc_resize_user = 0;
838
839 if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW)
840 return -EINVAL;
841
842 new_cols = (cols ? cols : vc->vc_cols);
843 new_rows = (lines ? lines : vc->vc_rows);
844 new_row_size = new_cols << 1;
845 new_screen_size = new_row_size * new_rows;
846
847 if (new_cols == vc->vc_cols && new_rows == vc->vc_rows)
848 return 0;
849
850 newscreen = kmalloc(new_screen_size, GFP_USER);
851 if (!newscreen)
852 return -ENOMEM;
853
854 old_rows = vc->vc_rows;
855 old_cols = vc->vc_cols;
856 old_row_size = vc->vc_size_row;
857 old_screen_size = vc->vc_screenbuf_size;
858
859 err = resize_screen(vc, new_cols, new_rows, user);
860 if (err) {
861 kfree(newscreen);
862 return err;
863 }
864
865 vc->vc_rows = new_rows;
866 vc->vc_cols = new_cols;
867 vc->vc_size_row = new_row_size;
868 vc->vc_screenbuf_size = new_screen_size;
869
870 rlth = min(old_row_size, new_row_size);
871 rrem = new_row_size - rlth;
872 old_origin = vc->vc_origin;
873 new_origin = (long) newscreen;
874 new_scr_end = new_origin + new_screen_size;
875
876 if (vc->vc_y > new_rows) {
877 if (old_rows - vc->vc_y < new_rows) {
878 /*
879 * Cursor near the bottom, copy contents from the
880 * bottom of buffer
881 */
882 old_origin += (old_rows - new_rows) * old_row_size;
883 end = vc->vc_scr_end;
884 } else {
885 /*
886 * Cursor is in no man's land, copy 1/2 screenful
887 * from the top and bottom of cursor position
888 */
889 old_origin += (vc->vc_y - new_rows/2) * old_row_size;
890 end = old_origin + (old_row_size * new_rows);
891 }
892 } else
893 /*
894 * Cursor near the top, copy contents from the top of buffer
895 */
896 end = (old_rows > new_rows) ? old_origin +
897 (old_row_size * new_rows) :
898 vc->vc_scr_end;
899
900 update_attr(vc);
901
902 while (old_origin < end) {
903 scr_memcpyw((unsigned short *) new_origin,
904 (unsigned short *) old_origin, rlth);
905 if (rrem)
906 scr_memsetw((void *)(new_origin + rlth),
907 vc->vc_video_erase_char, rrem);
908 old_origin += old_row_size;
909 new_origin += new_row_size;
910 }
911 if (new_scr_end > new_origin)
912 scr_memsetw((void *)new_origin, vc->vc_video_erase_char,
913 new_scr_end - new_origin);
914 kfree(vc->vc_screenbuf);
915 vc->vc_screenbuf = newscreen;
916 vc->vc_screenbuf_size = new_screen_size;
917 set_origin(vc);
918
919 /* do part of a reset_terminal() */
920 vc->vc_top = 0;
921 vc->vc_bottom = vc->vc_rows;
922 gotoxy(vc, vc->vc_x, vc->vc_y);
923 save_cur(vc);
924
925 if (tty) {
926 /* Rewrite the requested winsize data with the actual
927 resulting sizes */
928 struct winsize ws;
929 memset(&ws, 0, sizeof(ws));
930 ws.ws_row = vc->vc_rows;
931 ws.ws_col = vc->vc_cols;
932 ws.ws_ypixel = vc->vc_scan_lines;
933 tty_do_resize(tty, &ws);
934 }
935
936 if (CON_IS_VISIBLE(vc))
937 update_screen(vc);
938 return err;
939 }
940
941 /**
942 * vc_resize - resize a VT
943 * @vc: virtual console
944 * @cols: columns
945 * @rows: rows
946 *
947 * Resize a virtual console as seen from the console end of things. We
948 * use the common vc_do_resize methods to update the structures. The
949 * caller must hold the console sem to protect console internals and
950 * vc->vc_tty
951 */
952
953 int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int rows)
954 {
955 return vc_do_resize(vc->vc_tty, vc, cols, rows);
956 }
957
958 /**
959 * vt_resize - resize a VT
960 * @tty: tty to resize
961 * @ws: winsize attributes
962 *
963 * Resize a virtual terminal. This is called by the tty layer as we
964 * register our own handler for resizing. The mutual helper does all
965 * the actual work.
966 *
967 * Takes the console sem and the called methods then take the tty
968 * termios_mutex and the tty ctrl_lock in that order.
969 */
970 static int vt_resize(struct tty_struct *tty, struct winsize *ws)
971 {
972 struct vc_data *vc = tty->driver_data;
973 int ret;
974
975 acquire_console_sem();
976 ret = vc_do_resize(tty, vc, ws->ws_col, ws->ws_row);
977 release_console_sem();
978 return ret;
979 }
980
981 void vc_deallocate(unsigned int currcons)
982 {
983 WARN_CONSOLE_UNLOCKED();
984
985 if (vc_cons_allocated(currcons)) {
986 struct vc_data *vc = vc_cons[currcons].d;
987 struct vt_notifier_param param = { .vc = vc };
988
989 atomic_notifier_call_chain(&vt_notifier_list, VT_DEALLOCATE, &param);
990 vcs_remove_sysfs(currcons);
991 vc->vc_sw->con_deinit(vc);
992 put_pid(vc->vt_pid);
993 module_put(vc->vc_sw->owner);
994 kfree(vc->vc_screenbuf);
995 if (currcons >= MIN_NR_CONSOLES)
996 kfree(vc);
997 vc_cons[currcons].d = NULL;
998 }
999 }
1000
1001 /*
1002 * VT102 emulator
1003 */
1004
1005 #define set_kbd(vc, x) set_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1006 #define clr_kbd(vc, x) clr_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1007 #define is_kbd(vc, x) vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1008
1009 #define decarm VC_REPEAT
1010 #define decckm VC_CKMODE
1011 #define kbdapplic VC_APPLIC
1012 #define lnm VC_CRLF
1013
1014 /*
1015 * this is what the terminal answers to a ESC-Z or csi0c query.
1016 */
1017 #define VT100ID "\033[?1;2c"
1018 #define VT102ID "\033[?6c"
1019
1020 unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7,
1021 8,12,10,14, 9,13,11,15 };
1022
1023 /* the default colour table, for VGA+ colour systems */
1024 int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
1025 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
1026 int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
1027 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
1028 int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
1029 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
1030
1031 module_param_array(default_red, int, NULL, S_IRUGO | S_IWUSR);
1032 module_param_array(default_grn, int, NULL, S_IRUGO | S_IWUSR);
1033 module_param_array(default_blu, int, NULL, S_IRUGO | S_IWUSR);
1034
1035 /*
1036 * gotoxy() must verify all boundaries, because the arguments
1037 * might also be negative. If the given position is out of
1038 * bounds, the cursor is placed at the nearest margin.
1039 */
1040 static void gotoxy(struct vc_data *vc, int new_x, int new_y)
1041 {
1042 int min_y, max_y;
1043
1044 if (new_x < 0)
1045 vc->vc_x = 0;
1046 else {
1047 if (new_x >= vc->vc_cols)
1048 vc->vc_x = vc->vc_cols - 1;
1049 else
1050 vc->vc_x = new_x;
1051 }
1052
1053 if (vc->vc_decom) {
1054 min_y = vc->vc_top;
1055 max_y = vc->vc_bottom;
1056 } else {
1057 min_y = 0;
1058 max_y = vc->vc_rows;
1059 }
1060 if (new_y < min_y)
1061 vc->vc_y = min_y;
1062 else if (new_y >= max_y)
1063 vc->vc_y = max_y - 1;
1064 else
1065 vc->vc_y = new_y;
1066 vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1);
1067 vc->vc_need_wrap = 0;
1068 }
1069
1070 /* for absolute user moves, when decom is set */
1071 static void gotoxay(struct vc_data *vc, int new_x, int new_y)
1072 {
1073 gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y);
1074 }
1075
1076 void scrollback(struct vc_data *vc, int lines)
1077 {
1078 if (!lines)
1079 lines = vc->vc_rows / 2;
1080 scrolldelta(-lines);
1081 }
1082
1083 void scrollfront(struct vc_data *vc, int lines)
1084 {
1085 if (!lines)
1086 lines = vc->vc_rows / 2;
1087 scrolldelta(lines);
1088 }
1089
1090 static void lf(struct vc_data *vc)
1091 {
1092 /* don't scroll if above bottom of scrolling region, or
1093 * if below scrolling region
1094 */
1095 if (vc->vc_y + 1 == vc->vc_bottom)
1096 scrup(vc, vc->vc_top, vc->vc_bottom, 1);
1097 else if (vc->vc_y < vc->vc_rows - 1) {
1098 vc->vc_y++;
1099 vc->vc_pos += vc->vc_size_row;
1100 }
1101 vc->vc_need_wrap = 0;
1102 notify_write(vc, '\n');
1103 }
1104
1105 static void ri(struct vc_data *vc)
1106 {
1107 /* don't scroll if below top of scrolling region, or
1108 * if above scrolling region
1109 */
1110 if (vc->vc_y == vc->vc_top)
1111 scrdown(vc, vc->vc_top, vc->vc_bottom, 1);
1112 else if (vc->vc_y > 0) {
1113 vc->vc_y--;
1114 vc->vc_pos -= vc->vc_size_row;
1115 }
1116 vc->vc_need_wrap = 0;
1117 }
1118
1119 static inline void cr(struct vc_data *vc)
1120 {
1121 vc->vc_pos -= vc->vc_x << 1;
1122 vc->vc_need_wrap = vc->vc_x = 0;
1123 notify_write(vc, '\r');
1124 }
1125
1126 static inline void bs(struct vc_data *vc)
1127 {
1128 if (vc->vc_x) {
1129 vc->vc_pos -= 2;
1130 vc->vc_x--;
1131 vc->vc_need_wrap = 0;
1132 notify_write(vc, '\b');
1133 }
1134 }
1135
1136 static inline void del(struct vc_data *vc)
1137 {
1138 /* ignored */
1139 }
1140
1141 static void csi_J(struct vc_data *vc, int vpar)
1142 {
1143 unsigned int count;
1144 unsigned short * start;
1145
1146 switch (vpar) {
1147 case 0: /* erase from cursor to end of display */
1148 count = (vc->vc_scr_end - vc->vc_pos) >> 1;
1149 start = (unsigned short *)vc->vc_pos;
1150 if (DO_UPDATE(vc)) {
1151 /* do in two stages */
1152 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1153 vc->vc_cols - vc->vc_x);
1154 vc->vc_sw->con_clear(vc, vc->vc_y + 1, 0,
1155 vc->vc_rows - vc->vc_y - 1,
1156 vc->vc_cols);
1157 }
1158 break;
1159 case 1: /* erase from start to cursor */
1160 count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1;
1161 start = (unsigned short *)vc->vc_origin;
1162 if (DO_UPDATE(vc)) {
1163 /* do in two stages */
1164 vc->vc_sw->con_clear(vc, 0, 0, vc->vc_y,
1165 vc->vc_cols);
1166 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1167 vc->vc_x + 1);
1168 }
1169 break;
1170 case 2: /* erase whole display */
1171 count = vc->vc_cols * vc->vc_rows;
1172 start = (unsigned short *)vc->vc_origin;
1173 if (DO_UPDATE(vc))
1174 vc->vc_sw->con_clear(vc, 0, 0,
1175 vc->vc_rows,
1176 vc->vc_cols);
1177 break;
1178 default:
1179 return;
1180 }
1181 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1182 vc->vc_need_wrap = 0;
1183 }
1184
1185 static void csi_K(struct vc_data *vc, int vpar)
1186 {
1187 unsigned int count;
1188 unsigned short * start;
1189
1190 switch (vpar) {
1191 case 0: /* erase from cursor to end of line */
1192 count = vc->vc_cols - vc->vc_x;
1193 start = (unsigned short *)vc->vc_pos;
1194 if (DO_UPDATE(vc))
1195 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1196 vc->vc_cols - vc->vc_x);
1197 break;
1198 case 1: /* erase from start of line to cursor */
1199 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1200 count = vc->vc_x + 1;
1201 if (DO_UPDATE(vc))
1202 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1203 vc->vc_x + 1);
1204 break;
1205 case 2: /* erase whole line */
1206 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1207 count = vc->vc_cols;
1208 if (DO_UPDATE(vc))
1209 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1210 vc->vc_cols);
1211 break;
1212 default:
1213 return;
1214 }
1215 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1216 vc->vc_need_wrap = 0;
1217 }
1218
1219 static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */
1220 { /* not vt100? */
1221 int count;
1222
1223 if (!vpar)
1224 vpar++;
1225 count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar;
1226
1227 scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count);
1228 if (DO_UPDATE(vc))
1229 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count);
1230 vc->vc_need_wrap = 0;
1231 }
1232
1233 static void default_attr(struct vc_data *vc)
1234 {
1235 vc->vc_intensity = 1;
1236 vc->vc_italic = 0;
1237 vc->vc_underline = 0;
1238 vc->vc_reverse = 0;
1239 vc->vc_blink = 0;
1240 vc->vc_color = vc->vc_def_color;
1241 }
1242
1243 /* console_sem is held */
1244 static void csi_m(struct vc_data *vc)
1245 {
1246 int i;
1247
1248 for (i = 0; i <= vc->vc_npar; i++)
1249 switch (vc->vc_par[i]) {
1250 case 0: /* all attributes off */
1251 default_attr(vc);
1252 break;
1253 case 1:
1254 vc->vc_intensity = 2;
1255 break;
1256 case 2:
1257 vc->vc_intensity = 0;
1258 break;
1259 case 3:
1260 vc->vc_italic = 1;
1261 break;
1262 case 4:
1263 vc->vc_underline = 1;
1264 break;
1265 case 5:
1266 vc->vc_blink = 1;
1267 break;
1268 case 7:
1269 vc->vc_reverse = 1;
1270 break;
1271 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1272 * Select primary font, don't display
1273 * control chars if defined, don't set
1274 * bit 8 on output.
1275 */
1276 vc->vc_translate = set_translate(vc->vc_charset == 0
1277 ? vc->vc_G0_charset
1278 : vc->vc_G1_charset, vc);
1279 vc->vc_disp_ctrl = 0;
1280 vc->vc_toggle_meta = 0;
1281 break;
1282 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1283 * Select first alternate font, lets
1284 * chars < 32 be displayed as ROM chars.
1285 */
1286 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1287 vc->vc_disp_ctrl = 1;
1288 vc->vc_toggle_meta = 0;
1289 break;
1290 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1291 * Select second alternate font, toggle
1292 * high bit before displaying as ROM char.
1293 */
1294 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1295 vc->vc_disp_ctrl = 1;
1296 vc->vc_toggle_meta = 1;
1297 break;
1298 case 21:
1299 case 22:
1300 vc->vc_intensity = 1;
1301 break;
1302 case 23:
1303 vc->vc_italic = 0;
1304 break;
1305 case 24:
1306 vc->vc_underline = 0;
1307 break;
1308 case 25:
1309 vc->vc_blink = 0;
1310 break;
1311 case 27:
1312 vc->vc_reverse = 0;
1313 break;
1314 case 38: /* ANSI X3.64-1979 (SCO-ish?)
1315 * Enables underscore, white foreground
1316 * with white underscore (Linux - use
1317 * default foreground).
1318 */
1319 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1320 vc->vc_underline = 1;
1321 break;
1322 case 39: /* ANSI X3.64-1979 (SCO-ish?)
1323 * Disable underline option.
1324 * Reset colour to default? It did this
1325 * before...
1326 */
1327 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1328 vc->vc_underline = 0;
1329 break;
1330 case 49:
1331 vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f);
1332 break;
1333 default:
1334 if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37)
1335 vc->vc_color = color_table[vc->vc_par[i] - 30]
1336 | (vc->vc_color & 0xf0);
1337 else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47)
1338 vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4)
1339 | (vc->vc_color & 0x0f);
1340 break;
1341 }
1342 update_attr(vc);
1343 }
1344
1345 static void respond_string(const char *p, struct tty_struct *tty)
1346 {
1347 while (*p) {
1348 tty_insert_flip_char(tty, *p, 0);
1349 p++;
1350 }
1351 con_schedule_flip(tty);
1352 }
1353
1354 static void cursor_report(struct vc_data *vc, struct tty_struct *tty)
1355 {
1356 char buf[40];
1357
1358 sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1);
1359 respond_string(buf, tty);
1360 }
1361
1362 static inline void status_report(struct tty_struct *tty)
1363 {
1364 respond_string("\033[0n", tty); /* Terminal ok */
1365 }
1366
1367 static inline void respond_ID(struct tty_struct * tty)
1368 {
1369 respond_string(VT102ID, tty);
1370 }
1371
1372 void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry)
1373 {
1374 char buf[8];
1375
1376 sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx),
1377 (char)('!' + mry));
1378 respond_string(buf, tty);
1379 }
1380
1381 /* invoked via ioctl(TIOCLINUX) and through set_selection */
1382 int mouse_reporting(void)
1383 {
1384 return vc_cons[fg_console].d->vc_report_mouse;
1385 }
1386
1387 /* console_sem is held */
1388 static void set_mode(struct vc_data *vc, int on_off)
1389 {
1390 int i;
1391
1392 for (i = 0; i <= vc->vc_npar; i++)
1393 if (vc->vc_ques) {
1394 switch(vc->vc_par[i]) { /* DEC private modes set/reset */
1395 case 1: /* Cursor keys send ^[Ox/^[[x */
1396 if (on_off)
1397 set_kbd(vc, decckm);
1398 else
1399 clr_kbd(vc, decckm);
1400 break;
1401 case 3: /* 80/132 mode switch unimplemented */
1402 vc->vc_deccolm = on_off;
1403 #if 0
1404 vc_resize(deccolm ? 132 : 80, vc->vc_rows);
1405 /* this alone does not suffice; some user mode
1406 utility has to change the hardware regs */
1407 #endif
1408 break;
1409 case 5: /* Inverted screen on/off */
1410 if (vc->vc_decscnm != on_off) {
1411 vc->vc_decscnm = on_off;
1412 invert_screen(vc, 0, vc->vc_screenbuf_size, 0);
1413 update_attr(vc);
1414 }
1415 break;
1416 case 6: /* Origin relative/absolute */
1417 vc->vc_decom = on_off;
1418 gotoxay(vc, 0, 0);
1419 break;
1420 case 7: /* Autowrap on/off */
1421 vc->vc_decawm = on_off;
1422 break;
1423 case 8: /* Autorepeat on/off */
1424 if (on_off)
1425 set_kbd(vc, decarm);
1426 else
1427 clr_kbd(vc, decarm);
1428 break;
1429 case 9:
1430 vc->vc_report_mouse = on_off ? 1 : 0;
1431 break;
1432 case 25: /* Cursor on/off */
1433 vc->vc_deccm = on_off;
1434 break;
1435 case 1000:
1436 vc->vc_report_mouse = on_off ? 2 : 0;
1437 break;
1438 }
1439 } else {
1440 switch(vc->vc_par[i]) { /* ANSI modes set/reset */
1441 case 3: /* Monitor (display ctrls) */
1442 vc->vc_disp_ctrl = on_off;
1443 break;
1444 case 4: /* Insert Mode on/off */
1445 vc->vc_decim = on_off;
1446 break;
1447 case 20: /* Lf, Enter == CrLf/Lf */
1448 if (on_off)
1449 set_kbd(vc, lnm);
1450 else
1451 clr_kbd(vc, lnm);
1452 break;
1453 }
1454 }
1455 }
1456
1457 /* console_sem is held */
1458 static void setterm_command(struct vc_data *vc)
1459 {
1460 switch(vc->vc_par[0]) {
1461 case 1: /* set color for underline mode */
1462 if (vc->vc_can_do_color &&
1463 vc->vc_par[1] < 16) {
1464 vc->vc_ulcolor = color_table[vc->vc_par[1]];
1465 if (vc->vc_underline)
1466 update_attr(vc);
1467 }
1468 break;
1469 case 2: /* set color for half intensity mode */
1470 if (vc->vc_can_do_color &&
1471 vc->vc_par[1] < 16) {
1472 vc->vc_halfcolor = color_table[vc->vc_par[1]];
1473 if (vc->vc_intensity == 0)
1474 update_attr(vc);
1475 }
1476 break;
1477 case 8: /* store colors as defaults */
1478 vc->vc_def_color = vc->vc_attr;
1479 if (vc->vc_hi_font_mask == 0x100)
1480 vc->vc_def_color >>= 1;
1481 default_attr(vc);
1482 update_attr(vc);
1483 break;
1484 case 9: /* set blanking interval */
1485 blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60;
1486 poke_blanked_console();
1487 break;
1488 case 10: /* set bell frequency in Hz */
1489 if (vc->vc_npar >= 1)
1490 vc->vc_bell_pitch = vc->vc_par[1];
1491 else
1492 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1493 break;
1494 case 11: /* set bell duration in msec */
1495 if (vc->vc_npar >= 1)
1496 vc->vc_bell_duration = (vc->vc_par[1] < 2000) ?
1497 vc->vc_par[1] * HZ / 1000 : 0;
1498 else
1499 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1500 break;
1501 case 12: /* bring specified console to the front */
1502 if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1))
1503 set_console(vc->vc_par[1] - 1);
1504 break;
1505 case 13: /* unblank the screen */
1506 poke_blanked_console();
1507 break;
1508 case 14: /* set vesa powerdown interval */
1509 vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1510 break;
1511 case 15: /* activate the previous console */
1512 set_console(last_console);
1513 break;
1514 }
1515 }
1516
1517 /* console_sem is held */
1518 static void csi_at(struct vc_data *vc, unsigned int nr)
1519 {
1520 if (nr > vc->vc_cols - vc->vc_x)
1521 nr = vc->vc_cols - vc->vc_x;
1522 else if (!nr)
1523 nr = 1;
1524 insert_char(vc, nr);
1525 }
1526
1527 /* console_sem is held */
1528 static void csi_L(struct vc_data *vc, unsigned int nr)
1529 {
1530 if (nr > vc->vc_rows - vc->vc_y)
1531 nr = vc->vc_rows - vc->vc_y;
1532 else if (!nr)
1533 nr = 1;
1534 scrdown(vc, vc->vc_y, vc->vc_bottom, nr);
1535 vc->vc_need_wrap = 0;
1536 }
1537
1538 /* console_sem is held */
1539 static void csi_P(struct vc_data *vc, unsigned int nr)
1540 {
1541 if (nr > vc->vc_cols - vc->vc_x)
1542 nr = vc->vc_cols - vc->vc_x;
1543 else if (!nr)
1544 nr = 1;
1545 delete_char(vc, nr);
1546 }
1547
1548 /* console_sem is held */
1549 static void csi_M(struct vc_data *vc, unsigned int nr)
1550 {
1551 if (nr > vc->vc_rows - vc->vc_y)
1552 nr = vc->vc_rows - vc->vc_y;
1553 else if (!nr)
1554 nr=1;
1555 scrup(vc, vc->vc_y, vc->vc_bottom, nr);
1556 vc->vc_need_wrap = 0;
1557 }
1558
1559 /* console_sem is held (except via vc_init->reset_terminal */
1560 static void save_cur(struct vc_data *vc)
1561 {
1562 vc->vc_saved_x = vc->vc_x;
1563 vc->vc_saved_y = vc->vc_y;
1564 vc->vc_s_intensity = vc->vc_intensity;
1565 vc->vc_s_italic = vc->vc_italic;
1566 vc->vc_s_underline = vc->vc_underline;
1567 vc->vc_s_blink = vc->vc_blink;
1568 vc->vc_s_reverse = vc->vc_reverse;
1569 vc->vc_s_charset = vc->vc_charset;
1570 vc->vc_s_color = vc->vc_color;
1571 vc->vc_saved_G0 = vc->vc_G0_charset;
1572 vc->vc_saved_G1 = vc->vc_G1_charset;
1573 }
1574
1575 /* console_sem is held */
1576 static void restore_cur(struct vc_data *vc)
1577 {
1578 gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y);
1579 vc->vc_intensity = vc->vc_s_intensity;
1580 vc->vc_italic = vc->vc_s_italic;
1581 vc->vc_underline = vc->vc_s_underline;
1582 vc->vc_blink = vc->vc_s_blink;
1583 vc->vc_reverse = vc->vc_s_reverse;
1584 vc->vc_charset = vc->vc_s_charset;
1585 vc->vc_color = vc->vc_s_color;
1586 vc->vc_G0_charset = vc->vc_saved_G0;
1587 vc->vc_G1_charset = vc->vc_saved_G1;
1588 vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc);
1589 update_attr(vc);
1590 vc->vc_need_wrap = 0;
1591 }
1592
1593 enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey,
1594 EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd,
1595 ESpalette };
1596
1597 /* console_sem is held (except via vc_init()) */
1598 static void reset_terminal(struct vc_data *vc, int do_clear)
1599 {
1600 vc->vc_top = 0;
1601 vc->vc_bottom = vc->vc_rows;
1602 vc->vc_state = ESnormal;
1603 vc->vc_ques = 0;
1604 vc->vc_translate = set_translate(LAT1_MAP, vc);
1605 vc->vc_G0_charset = LAT1_MAP;
1606 vc->vc_G1_charset = GRAF_MAP;
1607 vc->vc_charset = 0;
1608 vc->vc_need_wrap = 0;
1609 vc->vc_report_mouse = 0;
1610 vc->vc_utf = default_utf8;
1611 vc->vc_utf_count = 0;
1612
1613 vc->vc_disp_ctrl = 0;
1614 vc->vc_toggle_meta = 0;
1615
1616 vc->vc_decscnm = 0;
1617 vc->vc_decom = 0;
1618 vc->vc_decawm = 1;
1619 vc->vc_deccm = 1;
1620 vc->vc_decim = 0;
1621
1622 set_kbd(vc, decarm);
1623 clr_kbd(vc, decckm);
1624 clr_kbd(vc, kbdapplic);
1625 clr_kbd(vc, lnm);
1626 kbd_table[vc->vc_num].lockstate = 0;
1627 kbd_table[vc->vc_num].slockstate = 0;
1628 kbd_table[vc->vc_num].ledmode = LED_SHOW_FLAGS;
1629 kbd_table[vc->vc_num].ledflagstate = kbd_table[vc->vc_num].default_ledflagstate;
1630 /* do not do set_leds here because this causes an endless tasklet loop
1631 when the keyboard hasn't been initialized yet */
1632
1633 vc->vc_cursor_type = CUR_DEFAULT;
1634 vc->vc_complement_mask = vc->vc_s_complement_mask;
1635
1636 default_attr(vc);
1637 update_attr(vc);
1638
1639 vc->vc_tab_stop[0] = 0x01010100;
1640 vc->vc_tab_stop[1] =
1641 vc->vc_tab_stop[2] =
1642 vc->vc_tab_stop[3] =
1643 vc->vc_tab_stop[4] =
1644 vc->vc_tab_stop[5] =
1645 vc->vc_tab_stop[6] =
1646 vc->vc_tab_stop[7] = 0x01010101;
1647
1648 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1649 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1650
1651 gotoxy(vc, 0, 0);
1652 save_cur(vc);
1653 if (do_clear)
1654 csi_J(vc, 2);
1655 }
1656
1657 /* console_sem is held */
1658 static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
1659 {
1660 /*
1661 * Control characters can be used in the _middle_
1662 * of an escape sequence.
1663 */
1664 switch (c) {
1665 case 0:
1666 return;
1667 case 7:
1668 if (vc->vc_bell_duration)
1669 kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration);
1670 return;
1671 case 8:
1672 bs(vc);
1673 return;
1674 case 9:
1675 vc->vc_pos -= (vc->vc_x << 1);
1676 while (vc->vc_x < vc->vc_cols - 1) {
1677 vc->vc_x++;
1678 if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31)))
1679 break;
1680 }
1681 vc->vc_pos += (vc->vc_x << 1);
1682 notify_write(vc, '\t');
1683 return;
1684 case 10: case 11: case 12:
1685 lf(vc);
1686 if (!is_kbd(vc, lnm))
1687 return;
1688 case 13:
1689 cr(vc);
1690 return;
1691 case 14:
1692 vc->vc_charset = 1;
1693 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1694 vc->vc_disp_ctrl = 1;
1695 return;
1696 case 15:
1697 vc->vc_charset = 0;
1698 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1699 vc->vc_disp_ctrl = 0;
1700 return;
1701 case 24: case 26:
1702 vc->vc_state = ESnormal;
1703 return;
1704 case 27:
1705 vc->vc_state = ESesc;
1706 return;
1707 case 127:
1708 del(vc);
1709 return;
1710 case 128+27:
1711 vc->vc_state = ESsquare;
1712 return;
1713 }
1714 switch(vc->vc_state) {
1715 case ESesc:
1716 vc->vc_state = ESnormal;
1717 switch (c) {
1718 case '[':
1719 vc->vc_state = ESsquare;
1720 return;
1721 case ']':
1722 vc->vc_state = ESnonstd;
1723 return;
1724 case '%':
1725 vc->vc_state = ESpercent;
1726 return;
1727 case 'E':
1728 cr(vc);
1729 lf(vc);
1730 return;
1731 case 'M':
1732 ri(vc);
1733 return;
1734 case 'D':
1735 lf(vc);
1736 return;
1737 case 'H':
1738 vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31));
1739 return;
1740 case 'Z':
1741 respond_ID(tty);
1742 return;
1743 case '7':
1744 save_cur(vc);
1745 return;
1746 case '8':
1747 restore_cur(vc);
1748 return;
1749 case '(':
1750 vc->vc_state = ESsetG0;
1751 return;
1752 case ')':
1753 vc->vc_state = ESsetG1;
1754 return;
1755 case '#':
1756 vc->vc_state = EShash;
1757 return;
1758 case 'c':
1759 reset_terminal(vc, 1);
1760 return;
1761 case '>': /* Numeric keypad */
1762 clr_kbd(vc, kbdapplic);
1763 return;
1764 case '=': /* Appl. keypad */
1765 set_kbd(vc, kbdapplic);
1766 return;
1767 }
1768 return;
1769 case ESnonstd:
1770 if (c=='P') { /* palette escape sequence */
1771 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1772 vc->vc_par[vc->vc_npar] = 0;
1773 vc->vc_npar = 0;
1774 vc->vc_state = ESpalette;
1775 return;
1776 } else if (c=='R') { /* reset palette */
1777 reset_palette(vc);
1778 vc->vc_state = ESnormal;
1779 } else
1780 vc->vc_state = ESnormal;
1781 return;
1782 case ESpalette:
1783 if ( (c>='0'&&c<='9') || (c>='A'&&c<='F') || (c>='a'&&c<='f') ) {
1784 vc->vc_par[vc->vc_npar++] = (c > '9' ? (c & 0xDF) - 'A' + 10 : c - '0');
1785 if (vc->vc_npar == 7) {
1786 int i = vc->vc_par[0] * 3, j = 1;
1787 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1788 vc->vc_palette[i++] += vc->vc_par[j++];
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 set_palette(vc);
1794 vc->vc_state = ESnormal;
1795 }
1796 } else
1797 vc->vc_state = ESnormal;
1798 return;
1799 case ESsquare:
1800 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1801 vc->vc_par[vc->vc_npar] = 0;
1802 vc->vc_npar = 0;
1803 vc->vc_state = ESgetpars;
1804 if (c == '[') { /* Function key */
1805 vc->vc_state=ESfunckey;
1806 return;
1807 }
1808 vc->vc_ques = (c == '?');
1809 if (vc->vc_ques)
1810 return;
1811 case ESgetpars:
1812 if (c == ';' && vc->vc_npar < NPAR - 1) {
1813 vc->vc_npar++;
1814 return;
1815 } else if (c>='0' && c<='9') {
1816 vc->vc_par[vc->vc_npar] *= 10;
1817 vc->vc_par[vc->vc_npar] += c - '0';
1818 return;
1819 } else
1820 vc->vc_state = ESgotpars;
1821 case ESgotpars:
1822 vc->vc_state = ESnormal;
1823 switch(c) {
1824 case 'h':
1825 set_mode(vc, 1);
1826 return;
1827 case 'l':
1828 set_mode(vc, 0);
1829 return;
1830 case 'c':
1831 if (vc->vc_ques) {
1832 if (vc->vc_par[0])
1833 vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16);
1834 else
1835 vc->vc_cursor_type = CUR_DEFAULT;
1836 return;
1837 }
1838 break;
1839 case 'm':
1840 if (vc->vc_ques) {
1841 clear_selection();
1842 if (vc->vc_par[0])
1843 vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1];
1844 else
1845 vc->vc_complement_mask = vc->vc_s_complement_mask;
1846 return;
1847 }
1848 break;
1849 case 'n':
1850 if (!vc->vc_ques) {
1851 if (vc->vc_par[0] == 5)
1852 status_report(tty);
1853 else if (vc->vc_par[0] == 6)
1854 cursor_report(vc, tty);
1855 }
1856 return;
1857 }
1858 if (vc->vc_ques) {
1859 vc->vc_ques = 0;
1860 return;
1861 }
1862 switch(c) {
1863 case 'G': case '`':
1864 if (vc->vc_par[0])
1865 vc->vc_par[0]--;
1866 gotoxy(vc, vc->vc_par[0], vc->vc_y);
1867 return;
1868 case 'A':
1869 if (!vc->vc_par[0])
1870 vc->vc_par[0]++;
1871 gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]);
1872 return;
1873 case 'B': case 'e':
1874 if (!vc->vc_par[0])
1875 vc->vc_par[0]++;
1876 gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]);
1877 return;
1878 case 'C': case 'a':
1879 if (!vc->vc_par[0])
1880 vc->vc_par[0]++;
1881 gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y);
1882 return;
1883 case 'D':
1884 if (!vc->vc_par[0])
1885 vc->vc_par[0]++;
1886 gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y);
1887 return;
1888 case 'E':
1889 if (!vc->vc_par[0])
1890 vc->vc_par[0]++;
1891 gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]);
1892 return;
1893 case 'F':
1894 if (!vc->vc_par[0])
1895 vc->vc_par[0]++;
1896 gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]);
1897 return;
1898 case 'd':
1899 if (vc->vc_par[0])
1900 vc->vc_par[0]--;
1901 gotoxay(vc, vc->vc_x ,vc->vc_par[0]);
1902 return;
1903 case 'H': case 'f':
1904 if (vc->vc_par[0])
1905 vc->vc_par[0]--;
1906 if (vc->vc_par[1])
1907 vc->vc_par[1]--;
1908 gotoxay(vc, vc->vc_par[1], vc->vc_par[0]);
1909 return;
1910 case 'J':
1911 csi_J(vc, vc->vc_par[0]);
1912 return;
1913 case 'K':
1914 csi_K(vc, vc->vc_par[0]);
1915 return;
1916 case 'L':
1917 csi_L(vc, vc->vc_par[0]);
1918 return;
1919 case 'M':
1920 csi_M(vc, vc->vc_par[0]);
1921 return;
1922 case 'P':
1923 csi_P(vc, vc->vc_par[0]);
1924 return;
1925 case 'c':
1926 if (!vc->vc_par[0])
1927 respond_ID(tty);
1928 return;
1929 case 'g':
1930 if (!vc->vc_par[0])
1931 vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31));
1932 else if (vc->vc_par[0] == 3) {
1933 vc->vc_tab_stop[0] =
1934 vc->vc_tab_stop[1] =
1935 vc->vc_tab_stop[2] =
1936 vc->vc_tab_stop[3] =
1937 vc->vc_tab_stop[4] =
1938 vc->vc_tab_stop[5] =
1939 vc->vc_tab_stop[6] =
1940 vc->vc_tab_stop[7] = 0;
1941 }
1942 return;
1943 case 'm':
1944 csi_m(vc);
1945 return;
1946 case 'q': /* DECLL - but only 3 leds */
1947 /* map 0,1,2,3 to 0,1,2,4 */
1948 if (vc->vc_par[0] < 4)
1949 setledstate(kbd_table + vc->vc_num,
1950 (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4);
1951 return;
1952 case 'r':
1953 if (!vc->vc_par[0])
1954 vc->vc_par[0]++;
1955 if (!vc->vc_par[1])
1956 vc->vc_par[1] = vc->vc_rows;
1957 /* Minimum allowed region is 2 lines */
1958 if (vc->vc_par[0] < vc->vc_par[1] &&
1959 vc->vc_par[1] <= vc->vc_rows) {
1960 vc->vc_top = vc->vc_par[0] - 1;
1961 vc->vc_bottom = vc->vc_par[1];
1962 gotoxay(vc, 0, 0);
1963 }
1964 return;
1965 case 's':
1966 save_cur(vc);
1967 return;
1968 case 'u':
1969 restore_cur(vc);
1970 return;
1971 case 'X':
1972 csi_X(vc, vc->vc_par[0]);
1973 return;
1974 case '@':
1975 csi_at(vc, vc->vc_par[0]);
1976 return;
1977 case ']': /* setterm functions */
1978 setterm_command(vc);
1979 return;
1980 }
1981 return;
1982 case ESpercent:
1983 vc->vc_state = ESnormal;
1984 switch (c) {
1985 case '@': /* defined in ISO 2022 */
1986 vc->vc_utf = 0;
1987 return;
1988 case 'G': /* prelim official escape code */
1989 case '8': /* retained for compatibility */
1990 vc->vc_utf = 1;
1991 return;
1992 }
1993 return;
1994 case ESfunckey:
1995 vc->vc_state = ESnormal;
1996 return;
1997 case EShash:
1998 vc->vc_state = ESnormal;
1999 if (c == '8') {
2000 /* DEC screen alignment test. kludge :-) */
2001 vc->vc_video_erase_char =
2002 (vc->vc_video_erase_char & 0xff00) | 'E';
2003 csi_J(vc, 2);
2004 vc->vc_video_erase_char =
2005 (vc->vc_video_erase_char & 0xff00) | ' ';
2006 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
2007 }
2008 return;
2009 case ESsetG0:
2010 if (c == '0')
2011 vc->vc_G0_charset = GRAF_MAP;
2012 else if (c == 'B')
2013 vc->vc_G0_charset = LAT1_MAP;
2014 else if (c == 'U')
2015 vc->vc_G0_charset = IBMPC_MAP;
2016 else if (c == 'K')
2017 vc->vc_G0_charset = USER_MAP;
2018 if (vc->vc_charset == 0)
2019 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
2020 vc->vc_state = ESnormal;
2021 return;
2022 case ESsetG1:
2023 if (c == '0')
2024 vc->vc_G1_charset = GRAF_MAP;
2025 else if (c == 'B')
2026 vc->vc_G1_charset = LAT1_MAP;
2027 else if (c == 'U')
2028 vc->vc_G1_charset = IBMPC_MAP;
2029 else if (c == 'K')
2030 vc->vc_G1_charset = USER_MAP;
2031 if (vc->vc_charset == 1)
2032 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
2033 vc->vc_state = ESnormal;
2034 return;
2035 default:
2036 vc->vc_state = ESnormal;
2037 }
2038 }
2039
2040 /* This is a temporary buffer used to prepare a tty console write
2041 * so that we can easily avoid touching user space while holding the
2042 * console spinlock. It is allocated in con_init and is shared by
2043 * this code and the vc_screen read/write tty calls.
2044 *
2045 * We have to allocate this statically in the kernel data section
2046 * since console_init (and thus con_init) are called before any
2047 * kernel memory allocation is available.
2048 */
2049 char con_buf[CON_BUF_SIZE];
2050 DEFINE_MUTEX(con_buf_mtx);
2051
2052 /* is_double_width() is based on the wcwidth() implementation by
2053 * Markus Kuhn -- 2007-05-26 (Unicode 5.0)
2054 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
2055 */
2056 struct interval {
2057 uint32_t first;
2058 uint32_t last;
2059 };
2060
2061 static int bisearch(uint32_t ucs, const struct interval *table, int max)
2062 {
2063 int min = 0;
2064 int mid;
2065
2066 if (ucs < table[0].first || ucs > table[max].last)
2067 return 0;
2068 while (max >= min) {
2069 mid = (min + max) / 2;
2070 if (ucs > table[mid].last)
2071 min = mid + 1;
2072 else if (ucs < table[mid].first)
2073 max = mid - 1;
2074 else
2075 return 1;
2076 }
2077 return 0;
2078 }
2079
2080 static int is_double_width(uint32_t ucs)
2081 {
2082 static const struct interval double_width[] = {
2083 { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E },
2084 { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF },
2085 { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 },
2086 { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD }
2087 };
2088 return bisearch(ucs, double_width, ARRAY_SIZE(double_width) - 1);
2089 }
2090
2091 /* acquires console_sem */
2092 static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2093 {
2094 #ifdef VT_BUF_VRAM_ONLY
2095 #define FLUSH do { } while(0);
2096 #else
2097 #define FLUSH if (draw_x >= 0) { \
2098 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
2099 draw_x = -1; \
2100 }
2101 #endif
2102
2103 int c, tc, ok, n = 0, draw_x = -1;
2104 unsigned int currcons;
2105 unsigned long draw_from = 0, draw_to = 0;
2106 struct vc_data *vc;
2107 unsigned char vc_attr;
2108 struct vt_notifier_param param;
2109 uint8_t rescan;
2110 uint8_t inverse;
2111 uint8_t width;
2112 u16 himask, charmask;
2113 const unsigned char *orig_buf = NULL;
2114 int orig_count;
2115
2116 if (in_interrupt())
2117 return count;
2118
2119 might_sleep();
2120
2121 acquire_console_sem();
2122 vc = tty->driver_data;
2123 if (vc == NULL) {
2124 printk(KERN_ERR "vt: argh, driver_data is NULL !\n");
2125 release_console_sem();
2126 return 0;
2127 }
2128
2129 currcons = vc->vc_num;
2130 if (!vc_cons_allocated(currcons)) {
2131 /* could this happen? */
2132 static int error = 0;
2133 if (!error) {
2134 error = 1;
2135 printk("con_write: tty %d not allocated\n", currcons+1);
2136 }
2137 release_console_sem();
2138 return 0;
2139 }
2140 orig_buf = buf;
2141 orig_count = count;
2142
2143 himask = vc->vc_hi_font_mask;
2144 charmask = himask ? 0x1ff : 0xff;
2145
2146 /* undraw cursor first */
2147 if (IS_FG(vc))
2148 hide_cursor(vc);
2149
2150 param.vc = vc;
2151
2152 while (!tty->stopped && count) {
2153 int orig = *buf;
2154 c = orig;
2155 buf++;
2156 n++;
2157 count--;
2158 rescan = 0;
2159 inverse = 0;
2160 width = 1;
2161
2162 /* Do no translation at all in control states */
2163 if (vc->vc_state != ESnormal) {
2164 tc = c;
2165 } else if (vc->vc_utf && !vc->vc_disp_ctrl) {
2166 /* Combine UTF-8 into Unicode in vc_utf_char.
2167 * vc_utf_count is the number of continuation bytes still
2168 * expected to arrive.
2169 * vc_npar is the number of continuation bytes arrived so
2170 * far
2171 */
2172 rescan_last_byte:
2173 if ((c & 0xc0) == 0x80) {
2174 /* Continuation byte received */
2175 static const uint32_t utf8_length_changes[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff };
2176 if (vc->vc_utf_count) {
2177 vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f);
2178 vc->vc_npar++;
2179 if (--vc->vc_utf_count) {
2180 /* Still need some bytes */
2181 continue;
2182 }
2183 /* Got a whole character */
2184 c = vc->vc_utf_char;
2185 /* Reject overlong sequences */
2186 if (c <= utf8_length_changes[vc->vc_npar - 1] ||
2187 c > utf8_length_changes[vc->vc_npar])
2188 c = 0xfffd;
2189 } else {
2190 /* Unexpected continuation byte */
2191 vc->vc_utf_count = 0;
2192 c = 0xfffd;
2193 }
2194 } else {
2195 /* Single ASCII byte or first byte of a sequence received */
2196 if (vc->vc_utf_count) {
2197 /* Continuation byte expected */
2198 rescan = 1;
2199 vc->vc_utf_count = 0;
2200 c = 0xfffd;
2201 } else if (c > 0x7f) {
2202 /* First byte of a multibyte sequence received */
2203 vc->vc_npar = 0;
2204 if ((c & 0xe0) == 0xc0) {
2205 vc->vc_utf_count = 1;
2206 vc->vc_utf_char = (c & 0x1f);
2207 } else if ((c & 0xf0) == 0xe0) {
2208 vc->vc_utf_count = 2;
2209 vc->vc_utf_char = (c & 0x0f);
2210 } else if ((c & 0xf8) == 0xf0) {
2211 vc->vc_utf_count = 3;
2212 vc->vc_utf_char = (c & 0x07);
2213 } else if ((c & 0xfc) == 0xf8) {
2214 vc->vc_utf_count = 4;
2215 vc->vc_utf_char = (c & 0x03);
2216 } else if ((c & 0xfe) == 0xfc) {
2217 vc->vc_utf_count = 5;
2218 vc->vc_utf_char = (c & 0x01);
2219 } else {
2220 /* 254 and 255 are invalid */
2221 c = 0xfffd;
2222 }
2223 if (vc->vc_utf_count) {
2224 /* Still need some bytes */
2225 continue;
2226 }
2227 }
2228 /* Nothing to do if an ASCII byte was received */
2229 }
2230 /* End of UTF-8 decoding. */
2231 /* c is the received character, or U+FFFD for invalid sequences. */
2232 /* Replace invalid Unicode code points with U+FFFD too */
2233 if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff)
2234 c = 0xfffd;
2235 tc = c;
2236 } else { /* no utf or alternate charset mode */
2237 tc = vc_translate(vc, c);
2238 }
2239
2240 param.c = tc;
2241 if (atomic_notifier_call_chain(&vt_notifier_list, VT_PREWRITE,
2242 &param) == NOTIFY_STOP)
2243 continue;
2244
2245 /* If the original code was a control character we
2246 * only allow a glyph to be displayed if the code is
2247 * not normally used (such as for cursor movement) or
2248 * if the disp_ctrl mode has been explicitly enabled.
2249 * Certain characters (as given by the CTRL_ALWAYS
2250 * bitmap) are always displayed as control characters,
2251 * as the console would be pretty useless without
2252 * them; to display an arbitrary font position use the
2253 * direct-to-font zone in UTF-8 mode.
2254 */
2255 ok = tc && (c >= 32 ||
2256 !(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 :
2257 vc->vc_utf || ((CTRL_ACTION >> c) & 1)))
2258 && (c != 127 || vc->vc_disp_ctrl)
2259 && (c != 128+27);
2260
2261 if (vc->vc_state == ESnormal && ok) {
2262 if (vc->vc_utf && !vc->vc_disp_ctrl) {
2263 if (is_double_width(c))
2264 width = 2;
2265 }
2266 /* Now try to find out how to display it */
2267 tc = conv_uni_to_pc(vc, tc);
2268 if (tc & ~charmask) {
2269 if (tc == -1 || tc == -2) {
2270 continue; /* nothing to display */
2271 }
2272 /* Glyph not found */
2273 if ((!(vc->vc_utf && !vc->vc_disp_ctrl) || c < 128) && !(c & ~charmask)) {
2274 /* In legacy mode use the glyph we get by a 1:1 mapping.
2275 This would make absolutely no sense with Unicode in mind,
2276 but do this for ASCII characters since a font may lack
2277 Unicode mapping info and we don't want to end up with
2278 having question marks only. */
2279 tc = c;
2280 } else {
2281 /* Display U+FFFD. If it's not found, display an inverse question mark. */
2282 tc = conv_uni_to_pc(vc, 0xfffd);
2283 if (tc < 0) {
2284 inverse = 1;
2285 tc = conv_uni_to_pc(vc, '?');
2286 if (tc < 0) tc = '?';
2287 }
2288 }
2289 }
2290
2291 if (!inverse) {
2292 vc_attr = vc->vc_attr;
2293 } else {
2294 /* invert vc_attr */
2295 if (!vc->vc_can_do_color) {
2296 vc_attr = (vc->vc_attr) ^ 0x08;
2297 } else if (vc->vc_hi_font_mask == 0x100) {
2298 vc_attr = ((vc->vc_attr) & 0x11) | (((vc->vc_attr) & 0xe0) >> 4) | (((vc->vc_attr) & 0x0e) << 4);
2299 } else {
2300 vc_attr = ((vc->vc_attr) & 0x88) | (((vc->vc_attr) & 0x70) >> 4) | (((vc->vc_attr) & 0x07) << 4);
2301 }
2302 FLUSH
2303 }
2304
2305 while (1) {
2306 if (vc->vc_need_wrap || vc->vc_decim)
2307 FLUSH
2308 if (vc->vc_need_wrap) {
2309 cr(vc);
2310 lf(vc);
2311 }
2312 if (vc->vc_decim)
2313 insert_char(vc, 1);
2314 scr_writew(himask ?
2315 ((vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) :
2316 (vc_attr << 8) + tc,
2317 (u16 *) vc->vc_pos);
2318 if (DO_UPDATE(vc) && draw_x < 0) {
2319 draw_x = vc->vc_x;
2320 draw_from = vc->vc_pos;
2321 }
2322 if (vc->vc_x == vc->vc_cols - 1) {
2323 vc->vc_need_wrap = vc->vc_decawm;
2324 draw_to = vc->vc_pos + 2;
2325 } else {
2326 vc->vc_x++;
2327 draw_to = (vc->vc_pos += 2);
2328 }
2329
2330 if (!--width) break;
2331
2332 tc = conv_uni_to_pc(vc, ' '); /* A space is printed in the second column */
2333 if (tc < 0) tc = ' ';
2334 }
2335 notify_write(vc, c);
2336
2337 if (inverse) {
2338 FLUSH
2339 }
2340
2341 if (rescan) {
2342 rescan = 0;
2343 inverse = 0;
2344 width = 1;
2345 c = orig;
2346 goto rescan_last_byte;
2347 }
2348 continue;
2349 }
2350 FLUSH
2351 do_con_trol(tty, vc, orig);
2352 }
2353 FLUSH
2354 console_conditional_schedule();
2355 release_console_sem();
2356 notify_update(vc);
2357 return n;
2358 #undef FLUSH
2359 }
2360
2361 /*
2362 * This is the console switching callback.
2363 *
2364 * Doing console switching in a process context allows
2365 * us to do the switches asynchronously (needed when we want
2366 * to switch due to a keyboard interrupt). Synchronization
2367 * with other console code and prevention of re-entrancy is
2368 * ensured with console_sem.
2369 */
2370 static void console_callback(struct work_struct *ignored)
2371 {
2372 acquire_console_sem();
2373
2374 if (want_console >= 0) {
2375 if (want_console != fg_console &&
2376 vc_cons_allocated(want_console)) {
2377 hide_cursor(vc_cons[fg_console].d);
2378 change_console(vc_cons[want_console].d);
2379 /* we only changed when the console had already
2380 been allocated - a new console is not created
2381 in an interrupt routine */
2382 }
2383 want_console = -1;
2384 }
2385 if (do_poke_blanked_console) { /* do not unblank for a LED change */
2386 do_poke_blanked_console = 0;
2387 poke_blanked_console();
2388 }
2389 if (scrollback_delta) {
2390 struct vc_data *vc = vc_cons[fg_console].d;
2391 clear_selection();
2392 if (vc->vc_mode == KD_TEXT)
2393 vc->vc_sw->con_scrolldelta(vc, scrollback_delta);
2394 scrollback_delta = 0;
2395 }
2396 if (blank_timer_expired) {
2397 do_blank_screen(0);
2398 blank_timer_expired = 0;
2399 }
2400 notify_update(vc_cons[fg_console].d);
2401
2402 release_console_sem();
2403 }
2404
2405 int set_console(int nr)
2406 {
2407 struct vc_data *vc = vc_cons[fg_console].d;
2408
2409 if (!vc_cons_allocated(nr) || vt_dont_switch ||
2410 (vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) {
2411
2412 /*
2413 * Console switch will fail in console_callback() or
2414 * change_console() so there is no point scheduling
2415 * the callback
2416 *
2417 * Existing set_console() users don't check the return
2418 * value so this shouldn't break anything
2419 */
2420 return -EINVAL;
2421 }
2422
2423 want_console = nr;
2424 schedule_console_callback();
2425
2426 return 0;
2427 }
2428
2429 struct tty_driver *console_driver;
2430
2431 #ifdef CONFIG_VT_CONSOLE
2432
2433 /*
2434 * Console on virtual terminal
2435 *
2436 * The console must be locked when we get here.
2437 */
2438
2439 static void vt_console_print(struct console *co, const char *b, unsigned count)
2440 {
2441 struct vc_data *vc = vc_cons[fg_console].d;
2442 unsigned char c;
2443 static DEFINE_SPINLOCK(printing_lock);
2444 const ushort *start;
2445 ushort cnt = 0;
2446 ushort myx;
2447
2448 /* console busy or not yet initialized */
2449 if (!printable)
2450 return;
2451 if (!spin_trylock(&printing_lock))
2452 return;
2453
2454 if (kmsg_redirect && vc_cons_allocated(kmsg_redirect - 1))
2455 vc = vc_cons[kmsg_redirect - 1].d;
2456
2457 /* read `x' only after setting currcons properly (otherwise
2458 the `x' macro will read the x of the foreground console). */
2459 myx = vc->vc_x;
2460
2461 if (!vc_cons_allocated(fg_console)) {
2462 /* impossible */
2463 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2464 goto quit;
2465 }
2466
2467 if (vc->vc_mode != KD_TEXT)
2468 goto quit;
2469
2470 /* undraw cursor first */
2471 if (IS_FG(vc))
2472 hide_cursor(vc);
2473
2474 start = (ushort *)vc->vc_pos;
2475
2476 /* Contrived structure to try to emulate original need_wrap behaviour
2477 * Problems caused when we have need_wrap set on '\n' character */
2478 while (count--) {
2479 c = *b++;
2480 if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) {
2481 if (cnt > 0) {
2482 if (CON_IS_VISIBLE(vc))
2483 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2484 vc->vc_x += cnt;
2485 if (vc->vc_need_wrap)
2486 vc->vc_x--;
2487 cnt = 0;
2488 }
2489 if (c == 8) { /* backspace */
2490 bs(vc);
2491 start = (ushort *)vc->vc_pos;
2492 myx = vc->vc_x;
2493 continue;
2494 }
2495 if (c != 13)
2496 lf(vc);
2497 cr(vc);
2498 start = (ushort *)vc->vc_pos;
2499 myx = vc->vc_x;
2500 if (c == 10 || c == 13)
2501 continue;
2502 }
2503 scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos);
2504 notify_write(vc, c);
2505 cnt++;
2506 if (myx == vc->vc_cols - 1) {
2507 vc->vc_need_wrap = 1;
2508 continue;
2509 }
2510 vc->vc_pos += 2;
2511 myx++;
2512 }
2513 if (cnt > 0) {
2514 if (CON_IS_VISIBLE(vc))
2515 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2516 vc->vc_x += cnt;
2517 if (vc->vc_x == vc->vc_cols) {
2518 vc->vc_x--;
2519 vc->vc_need_wrap = 1;
2520 }
2521 }
2522 set_cursor(vc);
2523 notify_update(vc);
2524
2525 quit:
2526 spin_unlock(&printing_lock);
2527 }
2528
2529 static struct tty_driver *vt_console_device(struct console *c, int *index)
2530 {
2531 *index = c->index ? c->index-1 : fg_console;
2532 return console_driver;
2533 }
2534
2535 static struct console vt_console_driver = {
2536 .name = "tty",
2537 .write = vt_console_print,
2538 .device = vt_console_device,
2539 .unblank = unblank_screen,
2540 .flags = CON_PRINTBUFFER,
2541 .index = -1,
2542 };
2543 #endif
2544
2545 /*
2546 * Handling of Linux-specific VC ioctls
2547 */
2548
2549 /*
2550 * Generally a bit racy with respect to console_sem().
2551 *
2552 * There are some functions which don't need it.
2553 *
2554 * There are some functions which can sleep for arbitrary periods
2555 * (paste_selection) but we don't need the lock there anyway.
2556 *
2557 * set_selection has locking, and definitely needs it
2558 */
2559
2560 int tioclinux(struct tty_struct *tty, unsigned long arg)
2561 {
2562 char type, data;
2563 char __user *p = (char __user *)arg;
2564 int lines;
2565 int ret;
2566
2567 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN))
2568 return -EPERM;
2569 if (get_user(type, p))
2570 return -EFAULT;
2571 ret = 0;
2572
2573 lock_kernel();
2574
2575 switch (type)
2576 {
2577 case TIOCL_SETSEL:
2578 acquire_console_sem();
2579 ret = set_selection((struct tiocl_selection __user *)(p+1), tty);
2580 release_console_sem();
2581 break;
2582 case TIOCL_PASTESEL:
2583 ret = paste_selection(tty);
2584 break;
2585 case TIOCL_UNBLANKSCREEN:
2586 acquire_console_sem();
2587 unblank_screen();
2588 release_console_sem();
2589 break;
2590 case TIOCL_SELLOADLUT:
2591 ret = sel_loadlut(p);
2592 break;
2593 case TIOCL_GETSHIFTSTATE:
2594
2595 /*
2596 * Make it possible to react to Shift+Mousebutton.
2597 * Note that 'shift_state' is an undocumented
2598 * kernel-internal variable; programs not closely
2599 * related to the kernel should not use this.
2600 */
2601 data = shift_state;
2602 ret = __put_user(data, p);
2603 break;
2604 case TIOCL_GETMOUSEREPORTING:
2605 data = mouse_reporting();
2606 ret = __put_user(data, p);
2607 break;
2608 case TIOCL_SETVESABLANK:
2609 ret = set_vesa_blanking(p);
2610 break;
2611 case TIOCL_GETKMSGREDIRECT:
2612 data = kmsg_redirect;
2613 ret = __put_user(data, p);
2614 break;
2615 case TIOCL_SETKMSGREDIRECT:
2616 if (!capable(CAP_SYS_ADMIN)) {
2617 ret = -EPERM;
2618 } else {
2619 if (get_user(data, p+1))
2620 ret = -EFAULT;
2621 else
2622 kmsg_redirect = data;
2623 }
2624 break;
2625 case TIOCL_GETFGCONSOLE:
2626 ret = fg_console;
2627 break;
2628 case TIOCL_SCROLLCONSOLE:
2629 if (get_user(lines, (s32 __user *)(p+4))) {
2630 ret = -EFAULT;
2631 } else {
2632 scrollfront(vc_cons[fg_console].d, lines);
2633 ret = 0;
2634 }
2635 break;
2636 case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
2637 acquire_console_sem();
2638 ignore_poke = 1;
2639 do_blank_screen(0);
2640 release_console_sem();
2641 break;
2642 case TIOCL_BLANKEDSCREEN:
2643 ret = console_blanked;
2644 break;
2645 default:
2646 ret = -EINVAL;
2647 break;
2648 }
2649 unlock_kernel();
2650 return ret;
2651 }
2652
2653 /*
2654 * /dev/ttyN handling
2655 */
2656
2657 static int con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2658 {
2659 int retval;
2660
2661 retval = do_con_write(tty, buf, count);
2662 con_flush_chars(tty);
2663
2664 return retval;
2665 }
2666
2667 static int con_put_char(struct tty_struct *tty, unsigned char ch)
2668 {
2669 if (in_interrupt())
2670 return 0; /* n_r3964 calls put_char() from interrupt context */
2671 return do_con_write(tty, &ch, 1);
2672 }
2673
2674 static int con_write_room(struct tty_struct *tty)
2675 {
2676 if (tty->stopped)
2677 return 0;
2678 return 32768; /* No limit, really; we're not buffering */
2679 }
2680
2681 static int con_chars_in_buffer(struct tty_struct *tty)
2682 {
2683 return 0; /* we're not buffering */
2684 }
2685
2686 /*
2687 * con_throttle and con_unthrottle are only used for
2688 * paste_selection(), which has to stuff in a large number of
2689 * characters...
2690 */
2691 static void con_throttle(struct tty_struct *tty)
2692 {
2693 }
2694
2695 static void con_unthrottle(struct tty_struct *tty)
2696 {
2697 struct vc_data *vc = tty->driver_data;
2698
2699 wake_up_interruptible(&vc->paste_wait);
2700 }
2701
2702 /*
2703 * Turn the Scroll-Lock LED on when the tty is stopped
2704 */
2705 static void con_stop(struct tty_struct *tty)
2706 {
2707 int console_num;
2708 if (!tty)
2709 return;
2710 console_num = tty->index;
2711 if (!vc_cons_allocated(console_num))
2712 return;
2713 set_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2714 set_leds();
2715 }
2716
2717 /*
2718 * Turn the Scroll-Lock LED off when the console is started
2719 */
2720 static void con_start(struct tty_struct *tty)
2721 {
2722 int console_num;
2723 if (!tty)
2724 return;
2725 console_num = tty->index;
2726 if (!vc_cons_allocated(console_num))
2727 return;
2728 clr_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2729 set_leds();
2730 }
2731
2732 static void con_flush_chars(struct tty_struct *tty)
2733 {
2734 struct vc_data *vc;
2735
2736 if (in_interrupt()) /* from flush_to_ldisc */
2737 return;
2738
2739 /* if we race with con_close(), vt may be null */
2740 acquire_console_sem();
2741 vc = tty->driver_data;
2742 if (vc)
2743 set_cursor(vc);
2744 release_console_sem();
2745 }
2746
2747 /*
2748 * Allocate the console screen memory.
2749 */
2750 static int con_open(struct tty_struct *tty, struct file *filp)
2751 {
2752 unsigned int currcons = tty->index;
2753 int ret = 0;
2754
2755 acquire_console_sem();
2756 if (tty->driver_data == NULL) {
2757 ret = vc_allocate(currcons);
2758 if (ret == 0) {
2759 struct vc_data *vc = vc_cons[currcons].d;
2760
2761 /* Still being freed */
2762 if (vc->vc_tty) {
2763 release_console_sem();
2764 return -ERESTARTSYS;
2765 }
2766 tty->driver_data = vc;
2767 vc->vc_tty = tty;
2768
2769 if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
2770 tty->winsize.ws_row = vc_cons[currcons].d->vc_rows;
2771 tty->winsize.ws_col = vc_cons[currcons].d->vc_cols;
2772 }
2773 if (vc->vc_utf)
2774 tty->termios->c_iflag |= IUTF8;
2775 else
2776 tty->termios->c_iflag &= ~IUTF8;
2777 release_console_sem();
2778 return ret;
2779 }
2780 }
2781 release_console_sem();
2782 return ret;
2783 }
2784
2785 static void con_close(struct tty_struct *tty, struct file *filp)
2786 {
2787 /* Nothing to do - we defer to shutdown */
2788 }
2789
2790 static void con_shutdown(struct tty_struct *tty)
2791 {
2792 struct vc_data *vc = tty->driver_data;
2793 BUG_ON(vc == NULL);
2794 acquire_console_sem();
2795 vc->vc_tty = NULL;
2796 release_console_sem();
2797 tty_shutdown(tty);
2798 }
2799
2800 static int default_italic_color = 2; // green (ASCII)
2801 static int default_underline_color = 3; // cyan (ASCII)
2802 module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR);
2803 module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR);
2804
2805 static void vc_init(struct vc_data *vc, unsigned int rows,
2806 unsigned int cols, int do_clear)
2807 {
2808 int j, k ;
2809
2810 vc->vc_cols = cols;
2811 vc->vc_rows = rows;
2812 vc->vc_size_row = cols << 1;
2813 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
2814
2815 set_origin(vc);
2816 vc->vc_pos = vc->vc_origin;
2817 reset_vc(vc);
2818 for (j=k=0; j<16; j++) {
2819 vc->vc_palette[k++] = default_red[j] ;
2820 vc->vc_palette[k++] = default_grn[j] ;
2821 vc->vc_palette[k++] = default_blu[j] ;
2822 }
2823 vc->vc_def_color = 0x07; /* white */
2824 vc->vc_ulcolor = default_underline_color;
2825 vc->vc_itcolor = default_italic_color;
2826 vc->vc_halfcolor = 0x08; /* grey */
2827 init_waitqueue_head(&vc->paste_wait);
2828 reset_terminal(vc, do_clear);
2829 }
2830
2831 /*
2832 * This routine initializes console interrupts, and does nothing
2833 * else. If you want the screen to clear, call tty_write with
2834 * the appropriate escape-sequence.
2835 */
2836
2837 static int __init con_init(void)
2838 {
2839 const char *display_desc = NULL;
2840 struct vc_data *vc;
2841 unsigned int currcons = 0, i;
2842
2843 acquire_console_sem();
2844
2845 if (conswitchp)
2846 display_desc = conswitchp->con_startup();
2847 if (!display_desc) {
2848 fg_console = 0;
2849 release_console_sem();
2850 return 0;
2851 }
2852
2853 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2854 struct con_driver *con_driver = &registered_con_driver[i];
2855
2856 if (con_driver->con == NULL) {
2857 con_driver->con = conswitchp;
2858 con_driver->desc = display_desc;
2859 con_driver->flag = CON_DRIVER_FLAG_INIT;
2860 con_driver->first = 0;
2861 con_driver->last = MAX_NR_CONSOLES - 1;
2862 break;
2863 }
2864 }
2865
2866 for (i = 0; i < MAX_NR_CONSOLES; i++)
2867 con_driver_map[i] = conswitchp;
2868
2869 if (blankinterval) {
2870 blank_state = blank_normal_wait;
2871 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
2872 }
2873
2874 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) {
2875 vc_cons[currcons].d = vc = kzalloc(sizeof(struct vc_data), GFP_NOWAIT);
2876 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
2877 visual_init(vc, currcons, 1);
2878 vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_NOWAIT);
2879 vc_init(vc, vc->vc_rows, vc->vc_cols,
2880 currcons || !vc->vc_sw->con_save_screen);
2881 }
2882 currcons = fg_console = 0;
2883 master_display_fg = vc = vc_cons[currcons].d;
2884 set_origin(vc);
2885 save_screen(vc);
2886 gotoxy(vc, vc->vc_x, vc->vc_y);
2887 csi_J(vc, 0);
2888 update_screen(vc);
2889 printk("Console: %s %s %dx%d",
2890 vc->vc_can_do_color ? "colour" : "mono",
2891 display_desc, vc->vc_cols, vc->vc_rows);
2892 printable = 1;
2893 printk("\n");
2894
2895 release_console_sem();
2896
2897 #ifdef CONFIG_VT_CONSOLE
2898 register_console(&vt_console_driver);
2899 #endif
2900 return 0;
2901 }
2902 console_initcall(con_init);
2903
2904 static const struct tty_operations con_ops = {
2905 .open = con_open,
2906 .close = con_close,
2907 .write = con_write,
2908 .write_room = con_write_room,
2909 .put_char = con_put_char,
2910 .flush_chars = con_flush_chars,
2911 .chars_in_buffer = con_chars_in_buffer,
2912 .ioctl = vt_ioctl,
2913 .stop = con_stop,
2914 .start = con_start,
2915 .throttle = con_throttle,
2916 .unthrottle = con_unthrottle,
2917 .resize = vt_resize,
2918 .shutdown = con_shutdown
2919 };
2920
2921 static struct cdev vc0_cdev;
2922
2923 int __init vty_init(const struct file_operations *console_fops)
2924 {
2925 cdev_init(&vc0_cdev, console_fops);
2926 if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) ||
2927 register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0)
2928 panic("Couldn't register /dev/tty0 driver\n");
2929 device_create(tty_class, NULL, MKDEV(TTY_MAJOR, 0), NULL, "tty0");
2930
2931 vcs_init();
2932
2933 console_driver = alloc_tty_driver(MAX_NR_CONSOLES);
2934 if (!console_driver)
2935 panic("Couldn't allocate console driver\n");
2936 console_driver->owner = THIS_MODULE;
2937 console_driver->name = "tty";
2938 console_driver->name_base = 1;
2939 console_driver->major = TTY_MAJOR;
2940 console_driver->minor_start = 1;
2941 console_driver->type = TTY_DRIVER_TYPE_CONSOLE;
2942 console_driver->init_termios = tty_std_termios;
2943 if (default_utf8)
2944 console_driver->init_termios.c_iflag |= IUTF8;
2945 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS;
2946 tty_set_operations(console_driver, &con_ops);
2947 if (tty_register_driver(console_driver))
2948 panic("Couldn't register console driver\n");
2949 kbd_init();
2950 console_map_init();
2951 #ifdef CONFIG_MDA_CONSOLE
2952 mda_console_init();
2953 #endif
2954 return 0;
2955 }
2956
2957 #ifndef VT_SINGLE_DRIVER
2958 #include <linux/device.h>
2959
2960 static struct class *vtconsole_class;
2961
2962 static int bind_con_driver(const struct consw *csw, int first, int last,
2963 int deflt)
2964 {
2965 struct module *owner = csw->owner;
2966 const char *desc = NULL;
2967 struct con_driver *con_driver;
2968 int i, j = -1, k = -1, retval = -ENODEV;
2969
2970 if (!try_module_get(owner))
2971 return -ENODEV;
2972
2973 acquire_console_sem();
2974
2975 /* check if driver is registered */
2976 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2977 con_driver = &registered_con_driver[i];
2978
2979 if (con_driver->con == csw) {
2980 desc = con_driver->desc;
2981 retval = 0;
2982 break;
2983 }
2984 }
2985
2986 if (retval)
2987 goto err;
2988
2989 if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) {
2990 csw->con_startup();
2991 con_driver->flag |= CON_DRIVER_FLAG_INIT;
2992 }
2993
2994 if (deflt) {
2995 if (conswitchp)
2996 module_put(conswitchp->owner);
2997
2998 __module_get(owner);
2999 conswitchp = csw;
3000 }
3001
3002 first = max(first, con_driver->first);
3003 last = min(last, con_driver->last);
3004
3005 for (i = first; i <= last; i++) {
3006 int old_was_color;
3007 struct vc_data *vc = vc_cons[i].d;
3008
3009 if (con_driver_map[i])
3010 module_put(con_driver_map[i]->owner);
3011 __module_get(owner);
3012 con_driver_map[i] = csw;
3013
3014 if (!vc || !vc->vc_sw)
3015 continue;
3016
3017 j = i;
3018
3019 if (CON_IS_VISIBLE(vc)) {
3020 k = i;
3021 save_screen(vc);
3022 }
3023
3024 old_was_color = vc->vc_can_do_color;
3025 vc->vc_sw->con_deinit(vc);
3026 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
3027 visual_init(vc, i, 0);
3028 set_origin(vc);
3029 update_attr(vc);
3030
3031 /* If the console changed between mono <-> color, then
3032 * the attributes in the screenbuf will be wrong. The
3033 * following resets all attributes to something sane.
3034 */
3035 if (old_was_color != vc->vc_can_do_color)
3036 clear_buffer_attributes(vc);
3037 }
3038
3039 printk("Console: switching ");
3040 if (!deflt)
3041 printk("consoles %d-%d ", first+1, last+1);
3042 if (j >= 0) {
3043 struct vc_data *vc = vc_cons[j].d;
3044
3045 printk("to %s %s %dx%d\n",
3046 vc->vc_can_do_color ? "colour" : "mono",
3047 desc, vc->vc_cols, vc->vc_rows);
3048
3049 if (k >= 0) {
3050 vc = vc_cons[k].d;
3051 update_screen(vc);
3052 }
3053 } else
3054 printk("to %s\n", desc);
3055
3056 retval = 0;
3057 err:
3058 release_console_sem();
3059 module_put(owner);
3060 return retval;
3061 };
3062
3063 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
3064 static int con_is_graphics(const struct consw *csw, int first, int last)
3065 {
3066 int i, retval = 0;
3067
3068 for (i = first; i <= last; i++) {
3069 struct vc_data *vc = vc_cons[i].d;
3070
3071 if (vc && vc->vc_mode == KD_GRAPHICS) {
3072 retval = 1;
3073 break;
3074 }
3075 }
3076
3077 return retval;
3078 }
3079
3080 /**
3081 * unbind_con_driver - unbind a console driver
3082 * @csw: pointer to console driver to unregister
3083 * @first: first in range of consoles that @csw should be unbound from
3084 * @last: last in range of consoles that @csw should be unbound from
3085 * @deflt: should next bound console driver be default after @csw is unbound?
3086 *
3087 * To unbind a driver from all possible consoles, pass 0 as @first and
3088 * %MAX_NR_CONSOLES as @last.
3089 *
3090 * @deflt controls whether the console that ends up replacing @csw should be
3091 * the default console.
3092 *
3093 * RETURNS:
3094 * -ENODEV if @csw isn't a registered console driver or can't be unregistered
3095 * or 0 on success.
3096 */
3097 int unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
3098 {
3099 struct module *owner = csw->owner;
3100 const struct consw *defcsw = NULL;
3101 struct con_driver *con_driver = NULL, *con_back = NULL;
3102 int i, retval = -ENODEV;
3103
3104 if (!try_module_get(owner))
3105 return -ENODEV;
3106
3107 acquire_console_sem();
3108
3109 /* check if driver is registered and if it is unbindable */
3110 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3111 con_driver = &registered_con_driver[i];
3112
3113 if (con_driver->con == csw &&
3114 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3115 retval = 0;
3116 break;
3117 }
3118 }
3119
3120 if (retval) {
3121 release_console_sem();
3122 goto err;
3123 }
3124
3125 retval = -ENODEV;
3126
3127 /* check if backup driver exists */
3128 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3129 con_back = &registered_con_driver[i];
3130
3131 if (con_back->con &&
3132 !(con_back->flag & CON_DRIVER_FLAG_MODULE)) {
3133 defcsw = con_back->con;
3134 retval = 0;
3135 break;
3136 }
3137 }
3138
3139 if (retval) {
3140 release_console_sem();
3141 goto err;
3142 }
3143
3144 if (!con_is_bound(csw)) {
3145 release_console_sem();
3146 goto err;
3147 }
3148
3149 first = max(first, con_driver->first);
3150 last = min(last, con_driver->last);
3151
3152 for (i = first; i <= last; i++) {
3153 if (con_driver_map[i] == csw) {
3154 module_put(csw->owner);
3155 con_driver_map[i] = NULL;
3156 }
3157 }
3158
3159 if (!con_is_bound(defcsw)) {
3160 const struct consw *defconsw = conswitchp;
3161
3162 defcsw->con_startup();
3163 con_back->flag |= CON_DRIVER_FLAG_INIT;
3164 /*
3165 * vgacon may change the default driver to point
3166 * to dummycon, we restore it here...
3167 */
3168 conswitchp = defconsw;
3169 }
3170
3171 if (!con_is_bound(csw))
3172 con_driver->flag &= ~CON_DRIVER_FLAG_INIT;
3173
3174 release_console_sem();
3175 /* ignore return value, binding should not fail */
3176 bind_con_driver(defcsw, first, last, deflt);
3177 err:
3178 module_put(owner);
3179 return retval;
3180
3181 }
3182 EXPORT_SYMBOL(unbind_con_driver);
3183
3184 static int vt_bind(struct con_driver *con)
3185 {
3186 const struct consw *defcsw = NULL, *csw = NULL;
3187 int i, more = 1, first = -1, last = -1, deflt = 0;
3188
3189 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3190 con_is_graphics(con->con, con->first, con->last))
3191 goto err;
3192
3193 csw = con->con;
3194
3195 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3196 struct con_driver *con = &registered_con_driver[i];
3197
3198 if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) {
3199 defcsw = con->con;
3200 break;
3201 }
3202 }
3203
3204 if (!defcsw)
3205 goto err;
3206
3207 while (more) {
3208 more = 0;
3209
3210 for (i = con->first; i <= con->last; i++) {
3211 if (con_driver_map[i] == defcsw) {
3212 if (first == -1)
3213 first = i;
3214 last = i;
3215 more = 1;
3216 } else if (first != -1)
3217 break;
3218 }
3219
3220 if (first == 0 && last == MAX_NR_CONSOLES -1)
3221 deflt = 1;
3222
3223 if (first != -1)
3224 bind_con_driver(csw, first, last, deflt);
3225
3226 first = -1;
3227 last = -1;
3228 deflt = 0;
3229 }
3230
3231 err:
3232 return 0;
3233 }
3234
3235 static int vt_unbind(struct con_driver *con)
3236 {
3237 const struct consw *csw = NULL;
3238 int i, more = 1, first = -1, last = -1, deflt = 0;
3239
3240 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3241 con_is_graphics(con->con, con->first, con->last))
3242 goto err;
3243
3244 csw = con->con;
3245
3246 while (more) {
3247 more = 0;
3248
3249 for (i = con->first; i <= con->last; i++) {
3250 if (con_driver_map[i] == csw) {
3251 if (first == -1)
3252 first = i;
3253 last = i;
3254 more = 1;
3255 } else if (first != -1)
3256 break;
3257 }
3258
3259 if (first == 0 && last == MAX_NR_CONSOLES -1)
3260 deflt = 1;
3261
3262 if (first != -1)
3263 unbind_con_driver(csw, first, last, deflt);
3264
3265 first = -1;
3266 last = -1;
3267 deflt = 0;
3268 }
3269
3270 err:
3271 return 0;
3272 }
3273 #else
3274 static inline int vt_bind(struct con_driver *con)
3275 {
3276 return 0;
3277 }
3278 static inline int vt_unbind(struct con_driver *con)
3279 {
3280 return 0;
3281 }
3282 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3283
3284 static ssize_t store_bind(struct device *dev, struct device_attribute *attr,
3285 const char *buf, size_t count)
3286 {
3287 struct con_driver *con = dev_get_drvdata(dev);
3288 int bind = simple_strtoul(buf, NULL, 0);
3289
3290 if (bind)
3291 vt_bind(con);
3292 else
3293 vt_unbind(con);
3294
3295 return count;
3296 }
3297
3298 static ssize_t show_bind(struct device *dev, struct device_attribute *attr,
3299 char *buf)
3300 {
3301 struct con_driver *con = dev_get_drvdata(dev);
3302 int bind = con_is_bound(con->con);
3303
3304 return snprintf(buf, PAGE_SIZE, "%i\n", bind);
3305 }
3306
3307 static ssize_t show_name(struct device *dev, struct device_attribute *attr,
3308 char *buf)
3309 {
3310 struct con_driver *con = dev_get_drvdata(dev);
3311
3312 return snprintf(buf, PAGE_SIZE, "%s %s\n",
3313 (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)",
3314 con->desc);
3315
3316 }
3317
3318 static struct device_attribute device_attrs[] = {
3319 __ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind),
3320 __ATTR(name, S_IRUGO, show_name, NULL),
3321 };
3322
3323 static int vtconsole_init_device(struct con_driver *con)
3324 {
3325 int i;
3326 int error = 0;
3327
3328 con->flag |= CON_DRIVER_FLAG_ATTR;
3329 dev_set_drvdata(con->dev, con);
3330 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3331 error = device_create_file(con->dev, &device_attrs[i]);
3332 if (error)
3333 break;
3334 }
3335
3336 if (error) {
3337 while (--i >= 0)
3338 device_remove_file(con->dev, &device_attrs[i]);
3339 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3340 }
3341
3342 return error;
3343 }
3344
3345 static void vtconsole_deinit_device(struct con_driver *con)
3346 {
3347 int i;
3348
3349 if (con->flag & CON_DRIVER_FLAG_ATTR) {
3350 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3351 device_remove_file(con->dev, &device_attrs[i]);
3352 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3353 }
3354 }
3355
3356 /**
3357 * con_is_bound - checks if driver is bound to the console
3358 * @csw: console driver
3359 *
3360 * RETURNS: zero if unbound, nonzero if bound
3361 *
3362 * Drivers can call this and if zero, they should release
3363 * all resources allocated on con_startup()
3364 */
3365 int con_is_bound(const struct consw *csw)
3366 {
3367 int i, bound = 0;
3368
3369 for (i = 0; i < MAX_NR_CONSOLES; i++) {
3370 if (con_driver_map[i] == csw) {
3371 bound = 1;
3372 break;
3373 }
3374 }
3375
3376 return bound;
3377 }
3378 EXPORT_SYMBOL(con_is_bound);
3379
3380 /**
3381 * register_con_driver - register console driver to console layer
3382 * @csw: console driver
3383 * @first: the first console to take over, minimum value is 0
3384 * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1
3385 *
3386 * DESCRIPTION: This function registers a console driver which can later
3387 * bind to a range of consoles specified by @first and @last. It will
3388 * also initialize the console driver by calling con_startup().
3389 */
3390 int register_con_driver(const struct consw *csw, int first, int last)
3391 {
3392 struct module *owner = csw->owner;
3393 struct con_driver *con_driver;
3394 const char *desc;
3395 int i, retval = 0;
3396
3397 if (!try_module_get(owner))
3398 return -ENODEV;
3399
3400 acquire_console_sem();
3401
3402 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3403 con_driver = &registered_con_driver[i];
3404
3405 /* already registered */
3406 if (con_driver->con == csw)
3407 retval = -EINVAL;
3408 }
3409
3410 if (retval)
3411 goto err;
3412
3413 desc = csw->con_startup();
3414
3415 if (!desc)
3416 goto err;
3417
3418 retval = -EINVAL;
3419
3420 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3421 con_driver = &registered_con_driver[i];
3422
3423 if (con_driver->con == NULL) {
3424 con_driver->con = csw;
3425 con_driver->desc = desc;
3426 con_driver->node = i;
3427 con_driver->flag = CON_DRIVER_FLAG_MODULE |
3428 CON_DRIVER_FLAG_INIT;
3429 con_driver->first = first;
3430 con_driver->last = last;
3431 retval = 0;
3432 break;
3433 }
3434 }
3435
3436 if (retval)
3437 goto err;
3438
3439 con_driver->dev = device_create(vtconsole_class, NULL,
3440 MKDEV(0, con_driver->node),
3441 NULL, "vtcon%i",
3442 con_driver->node);
3443
3444 if (IS_ERR(con_driver->dev)) {
3445 printk(KERN_WARNING "Unable to create device for %s; "
3446 "errno = %ld\n", con_driver->desc,
3447 PTR_ERR(con_driver->dev));
3448 con_driver->dev = NULL;
3449 } else {
3450 vtconsole_init_device(con_driver);
3451 }
3452
3453 err:
3454 release_console_sem();
3455 module_put(owner);
3456 return retval;
3457 }
3458 EXPORT_SYMBOL(register_con_driver);
3459
3460 /**
3461 * unregister_con_driver - unregister console driver from console layer
3462 * @csw: console driver
3463 *
3464 * DESCRIPTION: All drivers that registers to the console layer must
3465 * call this function upon exit, or if the console driver is in a state
3466 * where it won't be able to handle console services, such as the
3467 * framebuffer console without loaded framebuffer drivers.
3468 *
3469 * The driver must unbind first prior to unregistration.
3470 */
3471 int unregister_con_driver(const struct consw *csw)
3472 {
3473 int i, retval = -ENODEV;
3474
3475 acquire_console_sem();
3476
3477 /* cannot unregister a bound driver */
3478 if (con_is_bound(csw))
3479 goto err;
3480
3481 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3482 struct con_driver *con_driver = &registered_con_driver[i];
3483
3484 if (con_driver->con == csw &&
3485 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3486 vtconsole_deinit_device(con_driver);
3487 device_destroy(vtconsole_class,
3488 MKDEV(0, con_driver->node));
3489 con_driver->con = NULL;
3490 con_driver->desc = NULL;
3491 con_driver->dev = NULL;
3492 con_driver->node = 0;
3493 con_driver->flag = 0;
3494 con_driver->first = 0;
3495 con_driver->last = 0;
3496 retval = 0;
3497 break;
3498 }
3499 }
3500 err:
3501 release_console_sem();
3502 return retval;
3503 }
3504 EXPORT_SYMBOL(unregister_con_driver);
3505
3506 /*
3507 * If we support more console drivers, this function is used
3508 * when a driver wants to take over some existing consoles
3509 * and become default driver for newly opened ones.
3510 *
3511 * take_over_console is basically a register followed by unbind
3512 */
3513 int take_over_console(const struct consw *csw, int first, int last, int deflt)
3514 {
3515 int err;
3516
3517 err = register_con_driver(csw, first, last);
3518
3519 if (!err)
3520 bind_con_driver(csw, first, last, deflt);
3521
3522 return err;
3523 }
3524
3525 /*
3526 * give_up_console is a wrapper to unregister_con_driver. It will only
3527 * work if driver is fully unbound.
3528 */
3529 void give_up_console(const struct consw *csw)
3530 {
3531 unregister_con_driver(csw);
3532 }
3533
3534 static int __init vtconsole_class_init(void)
3535 {
3536 int i;
3537
3538 vtconsole_class = class_create(THIS_MODULE, "vtconsole");
3539 if (IS_ERR(vtconsole_class)) {
3540 printk(KERN_WARNING "Unable to create vt console class; "
3541 "errno = %ld\n", PTR_ERR(vtconsole_class));
3542 vtconsole_class = NULL;
3543 }
3544
3545 /* Add system drivers to sysfs */
3546 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3547 struct con_driver *con = &registered_con_driver[i];
3548
3549 if (con->con && !con->dev) {
3550 con->dev = device_create(vtconsole_class, NULL,
3551 MKDEV(0, con->node),
3552 NULL, "vtcon%i",
3553 con->node);
3554
3555 if (IS_ERR(con->dev)) {
3556 printk(KERN_WARNING "Unable to create "
3557 "device for %s; errno = %ld\n",
3558 con->desc, PTR_ERR(con->dev));
3559 con->dev = NULL;
3560 } else {
3561 vtconsole_init_device(con);
3562 }
3563 }
3564 }
3565
3566 return 0;
3567 }
3568 postcore_initcall(vtconsole_class_init);
3569
3570 #endif
3571
3572 /*
3573 * Screen blanking
3574 */
3575
3576 static int set_vesa_blanking(char __user *p)
3577 {
3578 unsigned int mode;
3579
3580 if (get_user(mode, p + 1))
3581 return -EFAULT;
3582
3583 vesa_blank_mode = (mode < 4) ? mode : 0;
3584 return 0;
3585 }
3586
3587 void do_blank_screen(int entering_gfx)
3588 {
3589 struct vc_data *vc = vc_cons[fg_console].d;
3590 int i;
3591
3592 WARN_CONSOLE_UNLOCKED();
3593
3594 if (console_blanked) {
3595 if (blank_state == blank_vesa_wait) {
3596 blank_state = blank_off;
3597 vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0);
3598 }
3599 return;
3600 }
3601
3602 /* entering graphics mode? */
3603 if (entering_gfx) {
3604 hide_cursor(vc);
3605 save_screen(vc);
3606 vc->vc_sw->con_blank(vc, -1, 1);
3607 console_blanked = fg_console + 1;
3608 blank_state = blank_off;
3609 set_origin(vc);
3610 return;
3611 }
3612
3613 if (blank_state != blank_normal_wait)
3614 return;
3615 blank_state = blank_off;
3616
3617 /* don't blank graphics */
3618 if (vc->vc_mode != KD_TEXT) {
3619 console_blanked = fg_console + 1;
3620 return;
3621 }
3622
3623 hide_cursor(vc);
3624 del_timer_sync(&console_timer);
3625 blank_timer_expired = 0;
3626
3627 save_screen(vc);
3628 /* In case we need to reset origin, blanking hook returns 1 */
3629 i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0);
3630 console_blanked = fg_console + 1;
3631 if (i)
3632 set_origin(vc);
3633
3634 if (console_blank_hook && console_blank_hook(1))
3635 return;
3636
3637 if (vesa_off_interval && vesa_blank_mode) {
3638 blank_state = blank_vesa_wait;
3639 mod_timer(&console_timer, jiffies + vesa_off_interval);
3640 }
3641 }
3642 EXPORT_SYMBOL(do_blank_screen);
3643
3644 /*
3645 * Called by timer as well as from vt_console_driver
3646 */
3647 void do_unblank_screen(int leaving_gfx)
3648 {
3649 struct vc_data *vc;
3650
3651 /* This should now always be called from a "sane" (read: can schedule)
3652 * context for the sake of the low level drivers, except in the special
3653 * case of oops_in_progress
3654 */
3655 if (!oops_in_progress)
3656 might_sleep();
3657
3658 WARN_CONSOLE_UNLOCKED();
3659
3660 ignore_poke = 0;
3661 if (!console_blanked)
3662 return;
3663 if (!vc_cons_allocated(fg_console)) {
3664 /* impossible */
3665 printk("unblank_screen: tty %d not allocated ??\n", fg_console+1);
3666 return;
3667 }
3668 vc = vc_cons[fg_console].d;
3669 if (vc->vc_mode != KD_TEXT)
3670 return; /* but leave console_blanked != 0 */
3671
3672 if (blankinterval) {
3673 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
3674 blank_state = blank_normal_wait;
3675 }
3676
3677 console_blanked = 0;
3678 if (vc->vc_sw->con_blank(vc, 0, leaving_gfx))
3679 /* Low-level driver cannot restore -> do it ourselves */
3680 update_screen(vc);
3681 if (console_blank_hook)
3682 console_blank_hook(0);
3683 set_palette(vc);
3684 set_cursor(vc);
3685 }
3686 EXPORT_SYMBOL(do_unblank_screen);
3687
3688 /*
3689 * This is called by the outside world to cause a forced unblank, mostly for
3690 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
3691 * call it with 1 as an argument and so force a mode restore... that may kill
3692 * X or at least garbage the screen but would also make the Oops visible...
3693 */
3694 void unblank_screen(void)
3695 {
3696 do_unblank_screen(0);
3697 }
3698
3699 /*
3700 * We defer the timer blanking to work queue so it can take the console mutex
3701 * (console operations can still happen at irq time, but only from printk which
3702 * has the console mutex. Not perfect yet, but better than no locking
3703 */
3704 static void blank_screen_t(unsigned long dummy)
3705 {
3706 if (unlikely(!keventd_up())) {
3707 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
3708 return;
3709 }
3710 blank_timer_expired = 1;
3711 schedule_work(&console_work);
3712 }
3713
3714 void poke_blanked_console(void)
3715 {
3716 WARN_CONSOLE_UNLOCKED();
3717
3718 /* Add this so we quickly catch whoever might call us in a non
3719 * safe context. Nowadays, unblank_screen() isn't to be called in
3720 * atomic contexts and is allowed to schedule (with the special case
3721 * of oops_in_progress, but that isn't of any concern for this
3722 * function. --BenH.
3723 */
3724 might_sleep();
3725
3726 /* This isn't perfectly race free, but a race here would be mostly harmless,
3727 * at worse, we'll do a spurrious blank and it's unlikely
3728 */
3729 del_timer(&console_timer);
3730 blank_timer_expired = 0;
3731
3732 if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS)
3733 return;
3734 if (console_blanked)
3735 unblank_screen();
3736 else if (blankinterval) {
3737 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
3738 blank_state = blank_normal_wait;
3739 }
3740 }
3741
3742 /*
3743 * Palettes
3744 */
3745
3746 static void set_palette(struct vc_data *vc)
3747 {
3748 WARN_CONSOLE_UNLOCKED();
3749
3750 if (vc->vc_mode != KD_GRAPHICS)
3751 vc->vc_sw->con_set_palette(vc, color_table);
3752 }
3753
3754 static int set_get_cmap(unsigned char __user *arg, int set)
3755 {
3756 int i, j, k;
3757
3758 WARN_CONSOLE_UNLOCKED();
3759
3760 for (i = 0; i < 16; i++)
3761 if (set) {
3762 get_user(default_red[i], arg++);
3763 get_user(default_grn[i], arg++);
3764 get_user(default_blu[i], arg++);
3765 } else {
3766 put_user(default_red[i], arg++);
3767 put_user(default_grn[i], arg++);
3768 put_user(default_blu[i], arg++);
3769 }
3770 if (set) {
3771 for (i = 0; i < MAX_NR_CONSOLES; i++)
3772 if (vc_cons_allocated(i)) {
3773 for (j = k = 0; j < 16; j++) {
3774 vc_cons[i].d->vc_palette[k++] = default_red[j];
3775 vc_cons[i].d->vc_palette[k++] = default_grn[j];
3776 vc_cons[i].d->vc_palette[k++] = default_blu[j];
3777 }
3778 set_palette(vc_cons[i].d);
3779 }
3780 }
3781 return 0;
3782 }
3783
3784 /*
3785 * Load palette into the DAC registers. arg points to a colour
3786 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
3787 */
3788
3789 int con_set_cmap(unsigned char __user *arg)
3790 {
3791 int rc;
3792
3793 acquire_console_sem();
3794 rc = set_get_cmap (arg,1);
3795 release_console_sem();
3796
3797 return rc;
3798 }
3799
3800 int con_get_cmap(unsigned char __user *arg)
3801 {
3802 int rc;
3803
3804 acquire_console_sem();
3805 rc = set_get_cmap (arg,0);
3806 release_console_sem();
3807
3808 return rc;
3809 }
3810
3811 void reset_palette(struct vc_data *vc)
3812 {
3813 int j, k;
3814 for (j=k=0; j<16; j++) {
3815 vc->vc_palette[k++] = default_red[j];
3816 vc->vc_palette[k++] = default_grn[j];
3817 vc->vc_palette[k++] = default_blu[j];
3818 }
3819 set_palette(vc);
3820 }
3821
3822 /*
3823 * Font switching
3824 *
3825 * Currently we only support fonts up to 32 pixels wide, at a maximum height
3826 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
3827 * depending on width) reserved for each character which is kinda wasty, but
3828 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
3829 * is upto the actual low-level console-driver convert data into its favorite
3830 * format (maybe we should add a `fontoffset' field to the `display'
3831 * structure so we won't have to convert the fontdata all the time.
3832 * /Jes
3833 */
3834
3835 #define max_font_size 65536
3836
3837 static int con_font_get(struct vc_data *vc, struct console_font_op *op)
3838 {
3839 struct console_font font;
3840 int rc = -EINVAL;
3841 int c;
3842
3843 if (vc->vc_mode != KD_TEXT)
3844 return -EINVAL;
3845
3846 if (op->data) {
3847 font.data = kmalloc(max_font_size, GFP_KERNEL);
3848 if (!font.data)
3849 return -ENOMEM;
3850 } else
3851 font.data = NULL;
3852
3853 acquire_console_sem();
3854 if (vc->vc_sw->con_font_get)
3855 rc = vc->vc_sw->con_font_get(vc, &font);
3856 else
3857 rc = -ENOSYS;
3858 release_console_sem();
3859
3860 if (rc)
3861 goto out;
3862
3863 c = (font.width+7)/8 * 32 * font.charcount;
3864
3865 if (op->data && font.charcount > op->charcount)
3866 rc = -ENOSPC;
3867 if (!(op->flags & KD_FONT_FLAG_OLD)) {
3868 if (font.width > op->width || font.height > op->height)
3869 rc = -ENOSPC;
3870 } else {
3871 if (font.width != 8)
3872 rc = -EIO;
3873 else if ((op->height && font.height > op->height) ||
3874 font.height > 32)
3875 rc = -ENOSPC;
3876 }
3877 if (rc)
3878 goto out;
3879
3880 op->height = font.height;
3881 op->width = font.width;
3882 op->charcount = font.charcount;
3883
3884 if (op->data && copy_to_user(op->data, font.data, c))
3885 rc = -EFAULT;
3886
3887 out:
3888 kfree(font.data);
3889 return rc;
3890 }
3891
3892 static int con_font_set(struct vc_data *vc, struct console_font_op *op)
3893 {
3894 struct console_font font;
3895 int rc = -EINVAL;
3896 int size;
3897
3898 if (vc->vc_mode != KD_TEXT)
3899 return -EINVAL;
3900 if (!op->data)
3901 return -EINVAL;
3902 if (op->charcount > 512)
3903 return -EINVAL;
3904 if (!op->height) { /* Need to guess font height [compat] */
3905 int h, i;
3906 u8 __user *charmap = op->data;
3907 u8 tmp;
3908
3909 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
3910 so that we can get rid of this soon */
3911 if (!(op->flags & KD_FONT_FLAG_OLD))
3912 return -EINVAL;
3913 for (h = 32; h > 0; h--)
3914 for (i = 0; i < op->charcount; i++) {
3915 if (get_user(tmp, &charmap[32*i+h-1]))
3916 return -EFAULT;
3917 if (tmp)
3918 goto nonzero;
3919 }
3920 return -EINVAL;
3921 nonzero:
3922 op->height = h;
3923 }
3924 if (op->width <= 0 || op->width > 32 || op->height > 32)
3925 return -EINVAL;
3926 size = (op->width+7)/8 * 32 * op->charcount;
3927 if (size > max_font_size)
3928 return -ENOSPC;
3929 font.charcount = op->charcount;
3930 font.height = op->height;
3931 font.width = op->width;
3932 font.data = kmalloc(size, GFP_KERNEL);
3933 if (!font.data)
3934 return -ENOMEM;
3935 if (copy_from_user(font.data, op->data, size)) {
3936 kfree(font.data);
3937 return -EFAULT;
3938 }
3939 acquire_console_sem();
3940 if (vc->vc_sw->con_font_set)
3941 rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
3942 else
3943 rc = -ENOSYS;
3944 release_console_sem();
3945 kfree(font.data);
3946 return rc;
3947 }
3948
3949 static int con_font_default(struct vc_data *vc, struct console_font_op *op)
3950 {
3951 struct console_font font = {.width = op->width, .height = op->height};
3952 char name[MAX_FONT_NAME];
3953 char *s = name;
3954 int rc;
3955
3956 if (vc->vc_mode != KD_TEXT)
3957 return -EINVAL;
3958
3959 if (!op->data)
3960 s = NULL;
3961 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0)
3962 return -EFAULT;
3963 else
3964 name[MAX_FONT_NAME - 1] = 0;
3965
3966 acquire_console_sem();
3967 if (vc->vc_sw->con_font_default)
3968 rc = vc->vc_sw->con_font_default(vc, &font, s);
3969 else
3970 rc = -ENOSYS;
3971 release_console_sem();
3972 if (!rc) {
3973 op->width = font.width;
3974 op->height = font.height;
3975 }
3976 return rc;
3977 }
3978
3979 static int con_font_copy(struct vc_data *vc, struct console_font_op *op)
3980 {
3981 int con = op->height;
3982 int rc;
3983
3984 if (vc->vc_mode != KD_TEXT)
3985 return -EINVAL;
3986
3987 acquire_console_sem();
3988 if (!vc->vc_sw->con_font_copy)
3989 rc = -ENOSYS;
3990 else if (con < 0 || !vc_cons_allocated(con))
3991 rc = -ENOTTY;
3992 else if (con == vc->vc_num) /* nothing to do */
3993 rc = 0;
3994 else
3995 rc = vc->vc_sw->con_font_copy(vc, con);
3996 release_console_sem();
3997 return rc;
3998 }
3999
4000 int con_font_op(struct vc_data *vc, struct console_font_op *op)
4001 {
4002 switch (op->op) {
4003 case KD_FONT_OP_SET:
4004 return con_font_set(vc, op);
4005 case KD_FONT_OP_GET:
4006 return con_font_get(vc, op);
4007 case KD_FONT_OP_SET_DEFAULT:
4008 return con_font_default(vc, op);
4009 case KD_FONT_OP_COPY:
4010 return con_font_copy(vc, op);
4011 }
4012 return -ENOSYS;
4013 }
4014
4015 /*
4016 * Interface exported to selection and vcs.
4017 */
4018
4019 /* used by selection */
4020 u16 screen_glyph(struct vc_data *vc, int offset)
4021 {
4022 u16 w = scr_readw(screenpos(vc, offset, 1));
4023 u16 c = w & 0xff;
4024
4025 if (w & vc->vc_hi_font_mask)
4026 c |= 0x100;
4027 return c;
4028 }
4029 EXPORT_SYMBOL_GPL(screen_glyph);
4030
4031 /* used by vcs - note the word offset */
4032 unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed)
4033 {
4034 return screenpos(vc, 2 * w_offset, viewed);
4035 }
4036
4037 void getconsxy(struct vc_data *vc, unsigned char *p)
4038 {
4039 p[0] = vc->vc_x;
4040 p[1] = vc->vc_y;
4041 }
4042
4043 void putconsxy(struct vc_data *vc, unsigned char *p)
4044 {
4045 hide_cursor(vc);
4046 gotoxy(vc, p[0], p[1]);
4047 set_cursor(vc);
4048 }
4049
4050 u16 vcs_scr_readw(struct vc_data *vc, const u16 *org)
4051 {
4052 if ((unsigned long)org == vc->vc_pos && softcursor_original != -1)
4053 return softcursor_original;
4054 return scr_readw(org);
4055 }
4056
4057 void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org)
4058 {
4059 scr_writew(val, org);
4060 if ((unsigned long)org == vc->vc_pos) {
4061 softcursor_original = -1;
4062 add_softcursor(vc);
4063 }
4064 }
4065
4066 /*
4067 * Visible symbols for modules
4068 */
4069
4070 EXPORT_SYMBOL(color_table);
4071 EXPORT_SYMBOL(default_red);
4072 EXPORT_SYMBOL(default_grn);
4073 EXPORT_SYMBOL(default_blu);
4074 EXPORT_SYMBOL(update_region);
4075 EXPORT_SYMBOL(redraw_screen);
4076 EXPORT_SYMBOL(vc_resize);
4077 EXPORT_SYMBOL(fg_console);
4078 EXPORT_SYMBOL(console_blank_hook);
4079 EXPORT_SYMBOL(console_blanked);
4080 EXPORT_SYMBOL(vc_cons);
4081 #ifndef VT_SINGLE_DRIVER
4082 EXPORT_SYMBOL(take_over_console);
4083 EXPORT_SYMBOL(give_up_console);
4084 #endif
Support for the Chinese Samsung S3C2440 based development boards