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compat_ioctl: hook up compat handler for FIEMAP ioctl
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / char / vt.c
blob372267daaebce24d33040454149a60d7779ac96e
1 /*
2 * linux/drivers/char/vt.c
3 *
4 * Copyright (C) 1991, 1992 Linus Torvalds
5 */
6
7 /*
8 * Hopefully this will be a rather complete VT102 implementation.
9 *
10 * Beeping thanks to John T Kohl.
11 *
12 * Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics
13 * Chars, and VT100 enhancements by Peter MacDonald.
14 *
15 * Copy and paste function by Andrew Haylett,
16 * some enhancements by Alessandro Rubini.
17 *
18 * Code to check for different video-cards mostly by Galen Hunt,
19 * <g-hunt@ee.utah.edu>
20 *
21 * Rudimentary ISO 10646/Unicode/UTF-8 character set support by
22 * Markus Kuhn, <mskuhn@immd4.informatik.uni-erlangen.de>.
23 *
24 * Dynamic allocation of consoles, aeb@cwi.nl, May 1994
25 * Resizing of consoles, aeb, 940926
26 *
27 * Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94
28 * <poe@daimi.aau.dk>
29 *
30 * User-defined bell sound, new setterm control sequences and printk
31 * redirection by Martin Mares <mj@k332.feld.cvut.cz> 19-Nov-95
32 *
33 * APM screenblank bug fixed Takashi Manabe <manabe@roy.dsl.tutics.tut.jp>
34 *
35 * Merge with the abstract console driver by Geert Uytterhoeven
36 * <geert@linux-m68k.org>, Jan 1997.
37 *
38 * Original m68k console driver modifications by
39 *
40 * - Arno Griffioen <arno@usn.nl>
41 * - David Carter <carter@cs.bris.ac.uk>
42 *
43 * The abstract console driver provides a generic interface for a text
44 * console. It supports VGA text mode, frame buffer based graphical consoles
45 * and special graphics processors that are only accessible through some
46 * registers (e.g. a TMS340x0 GSP).
47 *
48 * The interface to the hardware is specified using a special structure
49 * (struct consw) which contains function pointers to console operations
50 * (see <linux/console.h> for more information).
51 *
52 * Support for changeable cursor shape
53 * by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997
54 *
55 * Ported to i386 and con_scrolldelta fixed
56 * by Emmanuel Marty <core@ggi-project.org>, April 1998
57 *
58 * Resurrected character buffers in videoram plus lots of other trickery
59 * by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998
60 *
61 * Removed old-style timers, introduced console_timer, made timer
62 * deletion SMP-safe. 17Jun00, Andrew Morton <andrewm@uow.edu.au>
63 *
64 * Removed console_lock, enabled interrupts across all console operations
65 * 13 March 2001, Andrew Morton
66 *
67 * Fixed UTF-8 mode so alternate charset modes always work according
68 * to control sequences interpreted in do_con_trol function
69 * preserving backward VT100 semigraphics compatibility,
70 * malformed UTF sequences represented as sequences of replacement glyphs,
71 * original codes or '?' as a last resort if replacement glyph is undefined
72 * by Adam Tla/lka <atlka@pg.gda.pl>, Aug 2006
73 */
74
75 #include <linux/module.h>
76 #include <linux/types.h>
77 #include <linux/sched.h>
78 #include <linux/tty.h>
79 #include <linux/tty_flip.h>
80 #include <linux/kernel.h>
81 #include <linux/string.h>
82 #include <linux/errno.h>
83 #include <linux/kd.h>
84 #include <linux/slab.h>
85 #include <linux/major.h>
86 #include <linux/mm.h>
87 #include <linux/console.h>
88 #include <linux/init.h>
89 #include <linux/mutex.h>
90 #include <linux/vt_kern.h>
91 #include <linux/selection.h>
92 #include <linux/tiocl.h>
93 #include <linux/kbd_kern.h>
94 #include <linux/consolemap.h>
95 #include <linux/timer.h>
96 #include <linux/interrupt.h>
97 #include <linux/workqueue.h>
98 #include <linux/bootmem.h>
99 #include <linux/pm.h>
100 #include <linux/font.h>
101 #include <linux/bitops.h>
102 #include <linux/notifier.h>
103
104 #include <asm/io.h>
105 #include <asm/system.h>
106 #include <asm/uaccess.h>
107
108 #define MAX_NR_CON_DRIVER 16
109
110 #define CON_DRIVER_FLAG_MODULE 1
111 #define CON_DRIVER_FLAG_INIT 2
112 #define CON_DRIVER_FLAG_ATTR 4
113
114 struct con_driver {
115 const struct consw *con;
116 const char *desc;
117 struct device *dev;
118 int node;
119 int first;
120 int last;
121 int flag;
122 };
123
124 static struct con_driver registered_con_driver[MAX_NR_CON_DRIVER];
125 const struct consw *conswitchp;
126
127 /* A bitmap for codes <32. A bit of 1 indicates that the code
128 * corresponding to that bit number invokes some special action
129 * (such as cursor movement) and should not be displayed as a
130 * glyph unless the disp_ctrl mode is explicitly enabled.
131 */
132 #define CTRL_ACTION 0x0d00ff81
133 #define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */
134
135 /*
136 * Here is the default bell parameters: 750HZ, 1/8th of a second
137 */
138 #define DEFAULT_BELL_PITCH 750
139 #define DEFAULT_BELL_DURATION (HZ/8)
140
141 struct vc vc_cons [MAX_NR_CONSOLES];
142
143 #ifndef VT_SINGLE_DRIVER
144 static const struct consw *con_driver_map[MAX_NR_CONSOLES];
145 #endif
146
147 static int con_open(struct tty_struct *, struct file *);
148 static void vc_init(struct vc_data *vc, unsigned int rows,
149 unsigned int cols, int do_clear);
150 static void gotoxy(struct vc_data *vc, int new_x, int new_y);
151 static void save_cur(struct vc_data *vc);
152 static void reset_terminal(struct vc_data *vc, int do_clear);
153 static void con_flush_chars(struct tty_struct *tty);
154 static int set_vesa_blanking(char __user *p);
155 static void set_cursor(struct vc_data *vc);
156 static void hide_cursor(struct vc_data *vc);
157 static void console_callback(struct work_struct *ignored);
158 static void blank_screen_t(unsigned long dummy);
159 static void set_palette(struct vc_data *vc);
160
161 static int printable; /* Is console ready for printing? */
162 int default_utf8 = true;
163 module_param(default_utf8, int, S_IRUGO | S_IWUSR);
164
165 /*
166 * ignore_poke: don't unblank the screen when things are typed. This is
167 * mainly for the privacy of braille terminal users.
168 */
169 static int ignore_poke;
170
171 int do_poke_blanked_console;
172 int console_blanked;
173
174 static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
175 static int blankinterval = 10*60*HZ;
176 static int vesa_off_interval;
177
178 static DECLARE_WORK(console_work, console_callback);
179
180 /*
181 * fg_console is the current virtual console,
182 * last_console is the last used one,
183 * want_console is the console we want to switch to,
184 * kmsg_redirect is the console for kernel messages,
185 */
186 int fg_console;
187 int last_console;
188 int want_console = -1;
189 int kmsg_redirect;
190
191 /*
192 * For each existing display, we have a pointer to console currently visible
193 * on that display, allowing consoles other than fg_console to be refreshed
194 * appropriately. Unless the low-level driver supplies its own display_fg
195 * variable, we use this one for the "master display".
196 */
197 static struct vc_data *master_display_fg;
198
199 /*
200 * Unfortunately, we need to delay tty echo when we're currently writing to the
201 * console since the code is (and always was) not re-entrant, so we schedule
202 * all flip requests to process context with schedule-task() and run it from
203 * console_callback().
204 */
205
206 /*
207 * For the same reason, we defer scrollback to the console callback.
208 */
209 static int scrollback_delta;
210
211 /*
212 * Hook so that the power management routines can (un)blank
213 * the console on our behalf.
214 */
215 int (*console_blank_hook)(int);
216
217 static DEFINE_TIMER(console_timer, blank_screen_t, 0, 0);
218 static int blank_state;
219 static int blank_timer_expired;
220 enum {
221 blank_off = 0,
222 blank_normal_wait,
223 blank_vesa_wait,
224 };
225
226 /*
227 * Notifier list for console events.
228 */
229 static ATOMIC_NOTIFIER_HEAD(vt_notifier_list);
230
231 int register_vt_notifier(struct notifier_block *nb)
232 {
233 return atomic_notifier_chain_register(&vt_notifier_list, nb);
234 }
235 EXPORT_SYMBOL_GPL(register_vt_notifier);
236
237 int unregister_vt_notifier(struct notifier_block *nb)
238 {
239 return atomic_notifier_chain_unregister(&vt_notifier_list, nb);
240 }
241 EXPORT_SYMBOL_GPL(unregister_vt_notifier);
242
243 static void notify_write(struct vc_data *vc, unsigned int unicode)
244 {
245 struct vt_notifier_param param = { .vc = vc, unicode = unicode };
246 atomic_notifier_call_chain(&vt_notifier_list, VT_WRITE, &param);
247 }
248
249 static void notify_update(struct vc_data *vc)
250 {
251 struct vt_notifier_param param = { .vc = vc };
252 atomic_notifier_call_chain(&vt_notifier_list, VT_UPDATE, &param);
253 }
254
255 /*
256 * Low-Level Functions
257 */
258
259 #define IS_FG(vc) ((vc)->vc_num == fg_console)
260
261 #ifdef VT_BUF_VRAM_ONLY
262 #define DO_UPDATE(vc) 0
263 #else
264 #define DO_UPDATE(vc) (CON_IS_VISIBLE(vc) && !console_blanked)
265 #endif
266
267 static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed)
268 {
269 unsigned short *p;
270
271 if (!viewed)
272 p = (unsigned short *)(vc->vc_origin + offset);
273 else if (!vc->vc_sw->con_screen_pos)
274 p = (unsigned short *)(vc->vc_visible_origin + offset);
275 else
276 p = vc->vc_sw->con_screen_pos(vc, offset);
277 return p;
278 }
279
280 static inline void scrolldelta(int lines)
281 {
282 scrollback_delta += lines;
283 schedule_console_callback();
284 }
285
286 void schedule_console_callback(void)
287 {
288 schedule_work(&console_work);
289 }
290
291 static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
292 {
293 unsigned short *d, *s;
294
295 if (t+nr >= b)
296 nr = b - t - 1;
297 if (b > vc->vc_rows || t >= b || nr < 1)
298 return;
299 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr))
300 return;
301 d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
302 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr));
303 scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row);
304 scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_video_erase_char,
305 vc->vc_size_row * nr);
306 }
307
308 static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
309 {
310 unsigned short *s;
311 unsigned int step;
312
313 if (t+nr >= b)
314 nr = b - t - 1;
315 if (b > vc->vc_rows || t >= b || nr < 1)
316 return;
317 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr))
318 return;
319 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
320 step = vc->vc_cols * nr;
321 scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row);
322 scr_memsetw(s, vc->vc_video_erase_char, 2 * step);
323 }
324
325 static void do_update_region(struct vc_data *vc, unsigned long start, int count)
326 {
327 #ifndef VT_BUF_VRAM_ONLY
328 unsigned int xx, yy, offset;
329 u16 *p;
330
331 p = (u16 *) start;
332 if (!vc->vc_sw->con_getxy) {
333 offset = (start - vc->vc_origin) / 2;
334 xx = offset % vc->vc_cols;
335 yy = offset / vc->vc_cols;
336 } else {
337 int nxx, nyy;
338 start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy);
339 xx = nxx; yy = nyy;
340 }
341 for(;;) {
342 u16 attrib = scr_readw(p) & 0xff00;
343 int startx = xx;
344 u16 *q = p;
345 while (xx < vc->vc_cols && count) {
346 if (attrib != (scr_readw(p) & 0xff00)) {
347 if (p > q)
348 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
349 startx = xx;
350 q = p;
351 attrib = scr_readw(p) & 0xff00;
352 }
353 p++;
354 xx++;
355 count--;
356 }
357 if (p > q)
358 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
359 if (!count)
360 break;
361 xx = 0;
362 yy++;
363 if (vc->vc_sw->con_getxy) {
364 p = (u16 *)start;
365 start = vc->vc_sw->con_getxy(vc, start, NULL, NULL);
366 }
367 }
368 #endif
369 }
370
371 void update_region(struct vc_data *vc, unsigned long start, int count)
372 {
373 WARN_CONSOLE_UNLOCKED();
374
375 if (DO_UPDATE(vc)) {
376 hide_cursor(vc);
377 do_update_region(vc, start, count);
378 set_cursor(vc);
379 }
380 }
381
382 /* Structure of attributes is hardware-dependent */
383
384 static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink,
385 u8 _underline, u8 _reverse, u8 _italic)
386 {
387 if (vc->vc_sw->con_build_attr)
388 return vc->vc_sw->con_build_attr(vc, _color, _intensity,
389 _blink, _underline, _reverse, _italic);
390
391 #ifndef VT_BUF_VRAM_ONLY
392 /*
393 * ++roman: I completely changed the attribute format for monochrome
394 * mode (!can_do_color). The formerly used MDA (monochrome display
395 * adapter) format didn't allow the combination of certain effects.
396 * Now the attribute is just a bit vector:
397 * Bit 0..1: intensity (0..2)
398 * Bit 2 : underline
399 * Bit 3 : reverse
400 * Bit 7 : blink
401 */
402 {
403 u8 a = _color;
404 if (!vc->vc_can_do_color)
405 return _intensity |
406 (_italic ? 2 : 0) |
407 (_underline ? 4 : 0) |
408 (_reverse ? 8 : 0) |
409 (_blink ? 0x80 : 0);
410 if (_italic)
411 a = (a & 0xF0) | vc->vc_itcolor;
412 else if (_underline)
413 a = (a & 0xf0) | vc->vc_ulcolor;
414 else if (_intensity == 0)
415 a = (a & 0xf0) | vc->vc_ulcolor;
416 if (_reverse)
417 a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77);
418 if (_blink)
419 a ^= 0x80;
420 if (_intensity == 2)
421 a ^= 0x08;
422 if (vc->vc_hi_font_mask == 0x100)
423 a <<= 1;
424 return a;
425 }
426 #else
427 return 0;
428 #endif
429 }
430
431 static void update_attr(struct vc_data *vc)
432 {
433 vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity,
434 vc->vc_blink, vc->vc_underline,
435 vc->vc_reverse ^ vc->vc_decscnm, vc->vc_italic);
436 vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm, 0) << 8) | ' ';
437 }
438
439 /* Note: inverting the screen twice should revert to the original state */
440 void invert_screen(struct vc_data *vc, int offset, int count, int viewed)
441 {
442 unsigned short *p;
443
444 WARN_CONSOLE_UNLOCKED();
445
446 count /= 2;
447 p = screenpos(vc, offset, viewed);
448 if (vc->vc_sw->con_invert_region)
449 vc->vc_sw->con_invert_region(vc, p, count);
450 #ifndef VT_BUF_VRAM_ONLY
451 else {
452 u16 *q = p;
453 int cnt = count;
454 u16 a;
455
456 if (!vc->vc_can_do_color) {
457 while (cnt--) {
458 a = scr_readw(q);
459 a ^= 0x0800;
460 scr_writew(a, q);
461 q++;
462 }
463 } else if (vc->vc_hi_font_mask == 0x100) {
464 while (cnt--) {
465 a = scr_readw(q);
466 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4);
467 scr_writew(a, q);
468 q++;
469 }
470 } else {
471 while (cnt--) {
472 a = scr_readw(q);
473 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4);
474 scr_writew(a, q);
475 q++;
476 }
477 }
478 }
479 #endif
480 if (DO_UPDATE(vc))
481 do_update_region(vc, (unsigned long) p, count);
482 }
483
484 /* used by selection: complement pointer position */
485 void complement_pos(struct vc_data *vc, int offset)
486 {
487 static int old_offset = -1;
488 static unsigned short old;
489 static unsigned short oldx, oldy;
490
491 WARN_CONSOLE_UNLOCKED();
492
493 if (old_offset != -1 && old_offset >= 0 &&
494 old_offset < vc->vc_screenbuf_size) {
495 scr_writew(old, screenpos(vc, old_offset, 1));
496 if (DO_UPDATE(vc))
497 vc->vc_sw->con_putc(vc, old, oldy, oldx);
498 }
499
500 old_offset = offset;
501
502 if (offset != -1 && offset >= 0 &&
503 offset < vc->vc_screenbuf_size) {
504 unsigned short new;
505 unsigned short *p;
506 p = screenpos(vc, offset, 1);
507 old = scr_readw(p);
508 new = old ^ vc->vc_complement_mask;
509 scr_writew(new, p);
510 if (DO_UPDATE(vc)) {
511 oldx = (offset >> 1) % vc->vc_cols;
512 oldy = (offset >> 1) / vc->vc_cols;
513 vc->vc_sw->con_putc(vc, new, oldy, oldx);
514 }
515 }
516
517 }
518
519 static void insert_char(struct vc_data *vc, unsigned int nr)
520 {
521 unsigned short *p, *q = (unsigned short *)vc->vc_pos;
522
523 p = q + vc->vc_cols - nr - vc->vc_x;
524 while (--p >= q)
525 scr_writew(scr_readw(p), p + nr);
526 scr_memsetw(q, vc->vc_video_erase_char, nr * 2);
527 vc->vc_need_wrap = 0;
528 if (DO_UPDATE(vc)) {
529 unsigned short oldattr = vc->vc_attr;
530 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x, vc->vc_y, vc->vc_x + nr, 1,
531 vc->vc_cols - vc->vc_x - nr);
532 vc->vc_attr = vc->vc_video_erase_char >> 8;
533 while (nr--)
534 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y, vc->vc_x + nr);
535 vc->vc_attr = oldattr;
536 }
537 }
538
539 static void delete_char(struct vc_data *vc, unsigned int nr)
540 {
541 unsigned int i = vc->vc_x;
542 unsigned short *p = (unsigned short *)vc->vc_pos;
543
544 while (++i <= vc->vc_cols - nr) {
545 scr_writew(scr_readw(p+nr), p);
546 p++;
547 }
548 scr_memsetw(p, vc->vc_video_erase_char, nr * 2);
549 vc->vc_need_wrap = 0;
550 if (DO_UPDATE(vc)) {
551 unsigned short oldattr = vc->vc_attr;
552 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x + nr, vc->vc_y, vc->vc_x, 1,
553 vc->vc_cols - vc->vc_x - nr);
554 vc->vc_attr = vc->vc_video_erase_char >> 8;
555 while (nr--)
556 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y,
557 vc->vc_cols - 1 - nr);
558 vc->vc_attr = oldattr;
559 }
560 }
561
562 static int softcursor_original;
563
564 static void add_softcursor(struct vc_data *vc)
565 {
566 int i = scr_readw((u16 *) vc->vc_pos);
567 u32 type = vc->vc_cursor_type;
568
569 if (! (type & 0x10)) return;
570 if (softcursor_original != -1) return;
571 softcursor_original = i;
572 i |= ((type >> 8) & 0xff00 );
573 i ^= ((type) & 0xff00 );
574 if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000;
575 if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700;
576 scr_writew(i, (u16 *) vc->vc_pos);
577 if (DO_UPDATE(vc))
578 vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x);
579 }
580
581 static void hide_softcursor(struct vc_data *vc)
582 {
583 if (softcursor_original != -1) {
584 scr_writew(softcursor_original, (u16 *)vc->vc_pos);
585 if (DO_UPDATE(vc))
586 vc->vc_sw->con_putc(vc, softcursor_original,
587 vc->vc_y, vc->vc_x);
588 softcursor_original = -1;
589 }
590 }
591
592 static void hide_cursor(struct vc_data *vc)
593 {
594 if (vc == sel_cons)
595 clear_selection();
596 vc->vc_sw->con_cursor(vc, CM_ERASE);
597 hide_softcursor(vc);
598 }
599
600 static void set_cursor(struct vc_data *vc)
601 {
602 if (!IS_FG(vc) || console_blanked ||
603 vc->vc_mode == KD_GRAPHICS)
604 return;
605 if (vc->vc_deccm) {
606 if (vc == sel_cons)
607 clear_selection();
608 add_softcursor(vc);
609 if ((vc->vc_cursor_type & 0x0f) != 1)
610 vc->vc_sw->con_cursor(vc, CM_DRAW);
611 } else
612 hide_cursor(vc);
613 }
614
615 static void set_origin(struct vc_data *vc)
616 {
617 WARN_CONSOLE_UNLOCKED();
618
619 if (!CON_IS_VISIBLE(vc) ||
620 !vc->vc_sw->con_set_origin ||
621 !vc->vc_sw->con_set_origin(vc))
622 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
623 vc->vc_visible_origin = vc->vc_origin;
624 vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size;
625 vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x;
626 }
627
628 static inline void save_screen(struct vc_data *vc)
629 {
630 WARN_CONSOLE_UNLOCKED();
631
632 if (vc->vc_sw->con_save_screen)
633 vc->vc_sw->con_save_screen(vc);
634 }
635
636 /*
637 * Redrawing of screen
638 */
639
640 static void clear_buffer_attributes(struct vc_data *vc)
641 {
642 unsigned short *p = (unsigned short *)vc->vc_origin;
643 int count = vc->vc_screenbuf_size / 2;
644 int mask = vc->vc_hi_font_mask | 0xff;
645
646 for (; count > 0; count--, p++) {
647 scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p);
648 }
649 }
650
651 void redraw_screen(struct vc_data *vc, int is_switch)
652 {
653 int redraw = 0;
654
655 WARN_CONSOLE_UNLOCKED();
656
657 if (!vc) {
658 /* strange ... */
659 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
660 return;
661 }
662
663 if (is_switch) {
664 struct vc_data *old_vc = vc_cons[fg_console].d;
665 if (old_vc == vc)
666 return;
667 if (!CON_IS_VISIBLE(vc))
668 redraw = 1;
669 *vc->vc_display_fg = vc;
670 fg_console = vc->vc_num;
671 hide_cursor(old_vc);
672 if (!CON_IS_VISIBLE(old_vc)) {
673 save_screen(old_vc);
674 set_origin(old_vc);
675 }
676 } else {
677 hide_cursor(vc);
678 redraw = 1;
679 }
680
681 if (redraw) {
682 int update;
683 int old_was_color = vc->vc_can_do_color;
684
685 set_origin(vc);
686 update = vc->vc_sw->con_switch(vc);
687 set_palette(vc);
688 /*
689 * If console changed from mono<->color, the best we can do
690 * is to clear the buffer attributes. As it currently stands,
691 * rebuilding new attributes from the old buffer is not doable
692 * without overly complex code.
693 */
694 if (old_was_color != vc->vc_can_do_color) {
695 update_attr(vc);
696 clear_buffer_attributes(vc);
697 }
698 if (update && vc->vc_mode != KD_GRAPHICS)
699 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
700 }
701 set_cursor(vc);
702 if (is_switch) {
703 set_leds();
704 compute_shiftstate();
705 notify_update(vc);
706 }
707 }
708
709 /*
710 * Allocation, freeing and resizing of VTs.
711 */
712
713 int vc_cons_allocated(unsigned int i)
714 {
715 return (i < MAX_NR_CONSOLES && vc_cons[i].d);
716 }
717
718 static void visual_init(struct vc_data *vc, int num, int init)
719 {
720 /* ++Geert: vc->vc_sw->con_init determines console size */
721 if (vc->vc_sw)
722 module_put(vc->vc_sw->owner);
723 vc->vc_sw = conswitchp;
724 #ifndef VT_SINGLE_DRIVER
725 if (con_driver_map[num])
726 vc->vc_sw = con_driver_map[num];
727 #endif
728 __module_get(vc->vc_sw->owner);
729 vc->vc_num = num;
730 vc->vc_display_fg = &master_display_fg;
731 vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir;
732 vc->vc_uni_pagedir = 0;
733 vc->vc_hi_font_mask = 0;
734 vc->vc_complement_mask = 0;
735 vc->vc_can_do_color = 0;
736 vc->vc_sw->con_init(vc, init);
737 if (!vc->vc_complement_mask)
738 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
739 vc->vc_s_complement_mask = vc->vc_complement_mask;
740 vc->vc_size_row = vc->vc_cols << 1;
741 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
742 }
743
744 int vc_allocate(unsigned int currcons) /* return 0 on success */
745 {
746 WARN_CONSOLE_UNLOCKED();
747
748 if (currcons >= MAX_NR_CONSOLES)
749 return -ENXIO;
750 if (!vc_cons[currcons].d) {
751 struct vc_data *vc;
752 struct vt_notifier_param param;
753
754 /* prevent users from taking too much memory */
755 if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE))
756 return -EPERM;
757
758 /* due to the granularity of kmalloc, we waste some memory here */
759 /* the alloc is done in two steps, to optimize the common situation
760 of a 25x80 console (structsize=216, screenbuf_size=4000) */
761 /* although the numbers above are not valid since long ago, the
762 point is still up-to-date and the comment still has its value
763 even if only as a historical artifact. --mj, July 1998 */
764 param.vc = vc = kzalloc(sizeof(struct vc_data), GFP_KERNEL);
765 if (!vc)
766 return -ENOMEM;
767 vc_cons[currcons].d = vc;
768 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
769 visual_init(vc, currcons, 1);
770 if (!*vc->vc_uni_pagedir_loc)
771 con_set_default_unimap(vc);
772 if (!vc->vc_kmalloced)
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->vc_kmalloced = 1;
780 vc_init(vc, vc->vc_rows, vc->vc_cols, 1);
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 tty_struct *real_tty,
823 struct vc_data *vc, 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 if (vc->vc_kmalloced)
915 kfree(vc->vc_screenbuf);
916 vc->vc_screenbuf = newscreen;
917 vc->vc_kmalloced = 1;
918 vc->vc_screenbuf_size = new_screen_size;
919 set_origin(vc);
920
921 /* do part of a reset_terminal() */
922 vc->vc_top = 0;
923 vc->vc_bottom = vc->vc_rows;
924 gotoxy(vc, vc->vc_x, vc->vc_y);
925 save_cur(vc);
926
927 if (tty) {
928 /* Rewrite the requested winsize data with the actual
929 resulting sizes */
930 struct winsize ws;
931 memset(&ws, 0, sizeof(ws));
932 ws.ws_row = vc->vc_rows;
933 ws.ws_col = vc->vc_cols;
934 ws.ws_ypixel = vc->vc_scan_lines;
935 tty_do_resize(tty, real_tty, &ws);
936 }
937
938 if (CON_IS_VISIBLE(vc))
939 update_screen(vc);
940 return err;
941 }
942
943 /**
944 * vc_resize - resize a VT
945 * @vc: virtual console
946 * @cols: columns
947 * @rows: rows
948 *
949 * Resize a virtual console as seen from the console end of things. We
950 * use the common vc_do_resize methods to update the structures. The
951 * caller must hold the console sem to protect console internals and
952 * vc->vc_tty
953 */
954
955 int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int rows)
956 {
957 return vc_do_resize(vc->vc_tty, vc->vc_tty, vc, cols, rows);
958 }
959
960 /**
961 * vt_resize - resize a VT
962 * @tty: tty to resize
963 * @real_tty: tty if a pty/tty pair
964 * @ws: winsize attributes
965 *
966 * Resize a virtual terminal. This is called by the tty layer as we
967 * register our own handler for resizing. The mutual helper does all
968 * the actual work.
969 *
970 * Takes the console sem and the called methods then take the tty
971 * termios_mutex and the tty ctrl_lock in that order.
972 */
973
974 int vt_resize(struct tty_struct *tty, struct tty_struct *real_tty,
975 struct winsize *ws)
976 {
977 struct vc_data *vc = tty->driver_data;
978 int ret;
979
980 acquire_console_sem();
981 ret = vc_do_resize(tty, real_tty, vc, ws->ws_col, ws->ws_row);
982 release_console_sem();
983 return ret;
984 }
985
986 void vc_deallocate(unsigned int currcons)
987 {
988 WARN_CONSOLE_UNLOCKED();
989
990 if (vc_cons_allocated(currcons)) {
991 struct vc_data *vc = vc_cons[currcons].d;
992 struct vt_notifier_param param = { .vc = vc };
993 atomic_notifier_call_chain(&vt_notifier_list, VT_DEALLOCATE, &param);
994 vc->vc_sw->con_deinit(vc);
995 put_pid(vc->vt_pid);
996 module_put(vc->vc_sw->owner);
997 if (vc->vc_kmalloced)
998 kfree(vc->vc_screenbuf);
999 if (currcons >= MIN_NR_CONSOLES)
1000 kfree(vc);
1001 vc_cons[currcons].d = NULL;
1002 }
1003 }
1004
1005 /*
1006 * VT102 emulator
1007 */
1008
1009 #define set_kbd(vc, x) set_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1010 #define clr_kbd(vc, x) clr_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1011 #define is_kbd(vc, x) vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1012
1013 #define decarm VC_REPEAT
1014 #define decckm VC_CKMODE
1015 #define kbdapplic VC_APPLIC
1016 #define lnm VC_CRLF
1017
1018 /*
1019 * this is what the terminal answers to a ESC-Z or csi0c query.
1020 */
1021 #define VT100ID "\033[?1;2c"
1022 #define VT102ID "\033[?6c"
1023
1024 unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7,
1025 8,12,10,14, 9,13,11,15 };
1026
1027 /* the default colour table, for VGA+ colour systems */
1028 int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
1029 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
1030 int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
1031 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
1032 int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
1033 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
1034
1035 module_param_array(default_red, int, NULL, S_IRUGO | S_IWUSR);
1036 module_param_array(default_grn, int, NULL, S_IRUGO | S_IWUSR);
1037 module_param_array(default_blu, int, NULL, S_IRUGO | S_IWUSR);
1038
1039 /*
1040 * gotoxy() must verify all boundaries, because the arguments
1041 * might also be negative. If the given position is out of
1042 * bounds, the cursor is placed at the nearest margin.
1043 */
1044 static void gotoxy(struct vc_data *vc, int new_x, int new_y)
1045 {
1046 int min_y, max_y;
1047
1048 if (new_x < 0)
1049 vc->vc_x = 0;
1050 else {
1051 if (new_x >= vc->vc_cols)
1052 vc->vc_x = vc->vc_cols - 1;
1053 else
1054 vc->vc_x = new_x;
1055 }
1056
1057 if (vc->vc_decom) {
1058 min_y = vc->vc_top;
1059 max_y = vc->vc_bottom;
1060 } else {
1061 min_y = 0;
1062 max_y = vc->vc_rows;
1063 }
1064 if (new_y < min_y)
1065 vc->vc_y = min_y;
1066 else if (new_y >= max_y)
1067 vc->vc_y = max_y - 1;
1068 else
1069 vc->vc_y = new_y;
1070 vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1);
1071 vc->vc_need_wrap = 0;
1072 }
1073
1074 /* for absolute user moves, when decom is set */
1075 static void gotoxay(struct vc_data *vc, int new_x, int new_y)
1076 {
1077 gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y);
1078 }
1079
1080 void scrollback(struct vc_data *vc, int lines)
1081 {
1082 if (!lines)
1083 lines = vc->vc_rows / 2;
1084 scrolldelta(-lines);
1085 }
1086
1087 void scrollfront(struct vc_data *vc, int lines)
1088 {
1089 if (!lines)
1090 lines = vc->vc_rows / 2;
1091 scrolldelta(lines);
1092 }
1093
1094 static void lf(struct vc_data *vc)
1095 {
1096 /* don't scroll if above bottom of scrolling region, or
1097 * if below scrolling region
1098 */
1099 if (vc->vc_y + 1 == vc->vc_bottom)
1100 scrup(vc, vc->vc_top, vc->vc_bottom, 1);
1101 else if (vc->vc_y < vc->vc_rows - 1) {
1102 vc->vc_y++;
1103 vc->vc_pos += vc->vc_size_row;
1104 }
1105 vc->vc_need_wrap = 0;
1106 notify_write(vc, '\n');
1107 }
1108
1109 static void ri(struct vc_data *vc)
1110 {
1111 /* don't scroll if below top of scrolling region, or
1112 * if above scrolling region
1113 */
1114 if (vc->vc_y == vc->vc_top)
1115 scrdown(vc, vc->vc_top, vc->vc_bottom, 1);
1116 else if (vc->vc_y > 0) {
1117 vc->vc_y--;
1118 vc->vc_pos -= vc->vc_size_row;
1119 }
1120 vc->vc_need_wrap = 0;
1121 }
1122
1123 static inline void cr(struct vc_data *vc)
1124 {
1125 vc->vc_pos -= vc->vc_x << 1;
1126 vc->vc_need_wrap = vc->vc_x = 0;
1127 notify_write(vc, '\r');
1128 }
1129
1130 static inline void bs(struct vc_data *vc)
1131 {
1132 if (vc->vc_x) {
1133 vc->vc_pos -= 2;
1134 vc->vc_x--;
1135 vc->vc_need_wrap = 0;
1136 notify_write(vc, '\b');
1137 }
1138 }
1139
1140 static inline void del(struct vc_data *vc)
1141 {
1142 /* ignored */
1143 }
1144
1145 static void csi_J(struct vc_data *vc, int vpar)
1146 {
1147 unsigned int count;
1148 unsigned short * start;
1149
1150 switch (vpar) {
1151 case 0: /* erase from cursor to end of display */
1152 count = (vc->vc_scr_end - vc->vc_pos) >> 1;
1153 start = (unsigned short *)vc->vc_pos;
1154 if (DO_UPDATE(vc)) {
1155 /* do in two stages */
1156 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1157 vc->vc_cols - vc->vc_x);
1158 vc->vc_sw->con_clear(vc, vc->vc_y + 1, 0,
1159 vc->vc_rows - vc->vc_y - 1,
1160 vc->vc_cols);
1161 }
1162 break;
1163 case 1: /* erase from start to cursor */
1164 count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1;
1165 start = (unsigned short *)vc->vc_origin;
1166 if (DO_UPDATE(vc)) {
1167 /* do in two stages */
1168 vc->vc_sw->con_clear(vc, 0, 0, vc->vc_y,
1169 vc->vc_cols);
1170 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1171 vc->vc_x + 1);
1172 }
1173 break;
1174 case 2: /* erase whole display */
1175 count = vc->vc_cols * vc->vc_rows;
1176 start = (unsigned short *)vc->vc_origin;
1177 if (DO_UPDATE(vc))
1178 vc->vc_sw->con_clear(vc, 0, 0,
1179 vc->vc_rows,
1180 vc->vc_cols);
1181 break;
1182 default:
1183 return;
1184 }
1185 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1186 vc->vc_need_wrap = 0;
1187 }
1188
1189 static void csi_K(struct vc_data *vc, int vpar)
1190 {
1191 unsigned int count;
1192 unsigned short * start;
1193
1194 switch (vpar) {
1195 case 0: /* erase from cursor to end of line */
1196 count = vc->vc_cols - vc->vc_x;
1197 start = (unsigned short *)vc->vc_pos;
1198 if (DO_UPDATE(vc))
1199 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1200 vc->vc_cols - vc->vc_x);
1201 break;
1202 case 1: /* erase from start of line to cursor */
1203 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1204 count = vc->vc_x + 1;
1205 if (DO_UPDATE(vc))
1206 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1207 vc->vc_x + 1);
1208 break;
1209 case 2: /* erase whole line */
1210 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1211 count = vc->vc_cols;
1212 if (DO_UPDATE(vc))
1213 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1214 vc->vc_cols);
1215 break;
1216 default:
1217 return;
1218 }
1219 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1220 vc->vc_need_wrap = 0;
1221 }
1222
1223 static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */
1224 { /* not vt100? */
1225 int count;
1226
1227 if (!vpar)
1228 vpar++;
1229 count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar;
1230
1231 scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count);
1232 if (DO_UPDATE(vc))
1233 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count);
1234 vc->vc_need_wrap = 0;
1235 }
1236
1237 static void default_attr(struct vc_data *vc)
1238 {
1239 vc->vc_intensity = 1;
1240 vc->vc_italic = 0;
1241 vc->vc_underline = 0;
1242 vc->vc_reverse = 0;
1243 vc->vc_blink = 0;
1244 vc->vc_color = vc->vc_def_color;
1245 }
1246
1247 /* console_sem is held */
1248 static void csi_m(struct vc_data *vc)
1249 {
1250 int i;
1251
1252 for (i = 0; i <= vc->vc_npar; i++)
1253 switch (vc->vc_par[i]) {
1254 case 0: /* all attributes off */
1255 default_attr(vc);
1256 break;
1257 case 1:
1258 vc->vc_intensity = 2;
1259 break;
1260 case 2:
1261 vc->vc_intensity = 0;
1262 break;
1263 case 3:
1264 vc->vc_italic = 1;
1265 break;
1266 case 4:
1267 vc->vc_underline = 1;
1268 break;
1269 case 5:
1270 vc->vc_blink = 1;
1271 break;
1272 case 7:
1273 vc->vc_reverse = 1;
1274 break;
1275 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1276 * Select primary font, don't display
1277 * control chars if defined, don't set
1278 * bit 8 on output.
1279 */
1280 vc->vc_translate = set_translate(vc->vc_charset == 0
1281 ? vc->vc_G0_charset
1282 : vc->vc_G1_charset, vc);
1283 vc->vc_disp_ctrl = 0;
1284 vc->vc_toggle_meta = 0;
1285 break;
1286 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1287 * Select first alternate font, lets
1288 * chars < 32 be displayed as ROM chars.
1289 */
1290 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1291 vc->vc_disp_ctrl = 1;
1292 vc->vc_toggle_meta = 0;
1293 break;
1294 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1295 * Select second alternate font, toggle
1296 * high bit before displaying as ROM char.
1297 */
1298 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1299 vc->vc_disp_ctrl = 1;
1300 vc->vc_toggle_meta = 1;
1301 break;
1302 case 21:
1303 case 22:
1304 vc->vc_intensity = 1;
1305 break;
1306 case 23:
1307 vc->vc_italic = 0;
1308 break;
1309 case 24:
1310 vc->vc_underline = 0;
1311 break;
1312 case 25:
1313 vc->vc_blink = 0;
1314 break;
1315 case 27:
1316 vc->vc_reverse = 0;
1317 break;
1318 case 38: /* ANSI X3.64-1979 (SCO-ish?)
1319 * Enables underscore, white foreground
1320 * with white underscore (Linux - use
1321 * default foreground).
1322 */
1323 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1324 vc->vc_underline = 1;
1325 break;
1326 case 39: /* ANSI X3.64-1979 (SCO-ish?)
1327 * Disable underline option.
1328 * Reset colour to default? It did this
1329 * before...
1330 */
1331 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1332 vc->vc_underline = 0;
1333 break;
1334 case 49:
1335 vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f);
1336 break;
1337 default:
1338 if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37)
1339 vc->vc_color = color_table[vc->vc_par[i] - 30]
1340 | (vc->vc_color & 0xf0);
1341 else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47)
1342 vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4)
1343 | (vc->vc_color & 0x0f);
1344 break;
1345 }
1346 update_attr(vc);
1347 }
1348
1349 static void respond_string(const char *p, struct tty_struct *tty)
1350 {
1351 while (*p) {
1352 tty_insert_flip_char(tty, *p, 0);
1353 p++;
1354 }
1355 con_schedule_flip(tty);
1356 }
1357
1358 static void cursor_report(struct vc_data *vc, struct tty_struct *tty)
1359 {
1360 char buf[40];
1361
1362 sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1);
1363 respond_string(buf, tty);
1364 }
1365
1366 static inline void status_report(struct tty_struct *tty)
1367 {
1368 respond_string("\033[0n", tty); /* Terminal ok */
1369 }
1370
1371 static inline void respond_ID(struct tty_struct * tty)
1372 {
1373 respond_string(VT102ID, tty);
1374 }
1375
1376 void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry)
1377 {
1378 char buf[8];
1379
1380 sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx),
1381 (char)('!' + mry));
1382 respond_string(buf, tty);
1383 }
1384
1385 /* invoked via ioctl(TIOCLINUX) and through set_selection */
1386 int mouse_reporting(void)
1387 {
1388 return vc_cons[fg_console].d->vc_report_mouse;
1389 }
1390
1391 /* console_sem is held */
1392 static void set_mode(struct vc_data *vc, int on_off)
1393 {
1394 int i;
1395
1396 for (i = 0; i <= vc->vc_npar; i++)
1397 if (vc->vc_ques) {
1398 switch(vc->vc_par[i]) { /* DEC private modes set/reset */
1399 case 1: /* Cursor keys send ^[Ox/^[[x */
1400 if (on_off)
1401 set_kbd(vc, decckm);
1402 else
1403 clr_kbd(vc, decckm);
1404 break;
1405 case 3: /* 80/132 mode switch unimplemented */
1406 vc->vc_deccolm = on_off;
1407 #if 0
1408 vc_resize(deccolm ? 132 : 80, vc->vc_rows);
1409 /* this alone does not suffice; some user mode
1410 utility has to change the hardware regs */
1411 #endif
1412 break;
1413 case 5: /* Inverted screen on/off */
1414 if (vc->vc_decscnm != on_off) {
1415 vc->vc_decscnm = on_off;
1416 invert_screen(vc, 0, vc->vc_screenbuf_size, 0);
1417 update_attr(vc);
1418 }
1419 break;
1420 case 6: /* Origin relative/absolute */
1421 vc->vc_decom = on_off;
1422 gotoxay(vc, 0, 0);
1423 break;
1424 case 7: /* Autowrap on/off */
1425 vc->vc_decawm = on_off;
1426 break;
1427 case 8: /* Autorepeat on/off */
1428 if (on_off)
1429 set_kbd(vc, decarm);
1430 else
1431 clr_kbd(vc, decarm);
1432 break;
1433 case 9:
1434 vc->vc_report_mouse = on_off ? 1 : 0;
1435 break;
1436 case 25: /* Cursor on/off */
1437 vc->vc_deccm = on_off;
1438 break;
1439 case 1000:
1440 vc->vc_report_mouse = on_off ? 2 : 0;
1441 break;
1442 }
1443 } else {
1444 switch(vc->vc_par[i]) { /* ANSI modes set/reset */
1445 case 3: /* Monitor (display ctrls) */
1446 vc->vc_disp_ctrl = on_off;
1447 break;
1448 case 4: /* Insert Mode on/off */
1449 vc->vc_decim = on_off;
1450 break;
1451 case 20: /* Lf, Enter == CrLf/Lf */
1452 if (on_off)
1453 set_kbd(vc, lnm);
1454 else
1455 clr_kbd(vc, lnm);
1456 break;
1457 }
1458 }
1459 }
1460
1461 /* console_sem is held */
1462 static void setterm_command(struct vc_data *vc)
1463 {
1464 switch(vc->vc_par[0]) {
1465 case 1: /* set color for underline mode */
1466 if (vc->vc_can_do_color &&
1467 vc->vc_par[1] < 16) {
1468 vc->vc_ulcolor = color_table[vc->vc_par[1]];
1469 if (vc->vc_underline)
1470 update_attr(vc);
1471 }
1472 break;
1473 case 2: /* set color for half intensity mode */
1474 if (vc->vc_can_do_color &&
1475 vc->vc_par[1] < 16) {
1476 vc->vc_halfcolor = color_table[vc->vc_par[1]];
1477 if (vc->vc_intensity == 0)
1478 update_attr(vc);
1479 }
1480 break;
1481 case 8: /* store colors as defaults */
1482 vc->vc_def_color = vc->vc_attr;
1483 if (vc->vc_hi_font_mask == 0x100)
1484 vc->vc_def_color >>= 1;
1485 default_attr(vc);
1486 update_attr(vc);
1487 break;
1488 case 9: /* set blanking interval */
1489 blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1490 poke_blanked_console();
1491 break;
1492 case 10: /* set bell frequency in Hz */
1493 if (vc->vc_npar >= 1)
1494 vc->vc_bell_pitch = vc->vc_par[1];
1495 else
1496 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1497 break;
1498 case 11: /* set bell duration in msec */
1499 if (vc->vc_npar >= 1)
1500 vc->vc_bell_duration = (vc->vc_par[1] < 2000) ?
1501 vc->vc_par[1] * HZ / 1000 : 0;
1502 else
1503 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1504 break;
1505 case 12: /* bring specified console to the front */
1506 if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1))
1507 set_console(vc->vc_par[1] - 1);
1508 break;
1509 case 13: /* unblank the screen */
1510 poke_blanked_console();
1511 break;
1512 case 14: /* set vesa powerdown interval */
1513 vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1514 break;
1515 case 15: /* activate the previous console */
1516 set_console(last_console);
1517 break;
1518 }
1519 }
1520
1521 /* console_sem is held */
1522 static void csi_at(struct vc_data *vc, unsigned int nr)
1523 {
1524 if (nr > vc->vc_cols - vc->vc_x)
1525 nr = vc->vc_cols - vc->vc_x;
1526 else if (!nr)
1527 nr = 1;
1528 insert_char(vc, nr);
1529 }
1530
1531 /* console_sem is held */
1532 static void csi_L(struct vc_data *vc, unsigned int nr)
1533 {
1534 if (nr > vc->vc_rows - vc->vc_y)
1535 nr = vc->vc_rows - vc->vc_y;
1536 else if (!nr)
1537 nr = 1;
1538 scrdown(vc, vc->vc_y, vc->vc_bottom, nr);
1539 vc->vc_need_wrap = 0;
1540 }
1541
1542 /* console_sem is held */
1543 static void csi_P(struct vc_data *vc, unsigned int nr)
1544 {
1545 if (nr > vc->vc_cols - vc->vc_x)
1546 nr = vc->vc_cols - vc->vc_x;
1547 else if (!nr)
1548 nr = 1;
1549 delete_char(vc, nr);
1550 }
1551
1552 /* console_sem is held */
1553 static void csi_M(struct vc_data *vc, unsigned int nr)
1554 {
1555 if (nr > vc->vc_rows - vc->vc_y)
1556 nr = vc->vc_rows - vc->vc_y;
1557 else if (!nr)
1558 nr=1;
1559 scrup(vc, vc->vc_y, vc->vc_bottom, nr);
1560 vc->vc_need_wrap = 0;
1561 }
1562
1563 /* console_sem is held (except via vc_init->reset_terminal */
1564 static void save_cur(struct vc_data *vc)
1565 {
1566 vc->vc_saved_x = vc->vc_x;
1567 vc->vc_saved_y = vc->vc_y;
1568 vc->vc_s_intensity = vc->vc_intensity;
1569 vc->vc_s_italic = vc->vc_italic;
1570 vc->vc_s_underline = vc->vc_underline;
1571 vc->vc_s_blink = vc->vc_blink;
1572 vc->vc_s_reverse = vc->vc_reverse;
1573 vc->vc_s_charset = vc->vc_charset;
1574 vc->vc_s_color = vc->vc_color;
1575 vc->vc_saved_G0 = vc->vc_G0_charset;
1576 vc->vc_saved_G1 = vc->vc_G1_charset;
1577 }
1578
1579 /* console_sem is held */
1580 static void restore_cur(struct vc_data *vc)
1581 {
1582 gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y);
1583 vc->vc_intensity = vc->vc_s_intensity;
1584 vc->vc_italic = vc->vc_s_italic;
1585 vc->vc_underline = vc->vc_s_underline;
1586 vc->vc_blink = vc->vc_s_blink;
1587 vc->vc_reverse = vc->vc_s_reverse;
1588 vc->vc_charset = vc->vc_s_charset;
1589 vc->vc_color = vc->vc_s_color;
1590 vc->vc_G0_charset = vc->vc_saved_G0;
1591 vc->vc_G1_charset = vc->vc_saved_G1;
1592 vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc);
1593 update_attr(vc);
1594 vc->vc_need_wrap = 0;
1595 }
1596
1597 enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey,
1598 EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd,
1599 ESpalette };
1600
1601 /* console_sem is held (except via vc_init()) */
1602 static void reset_terminal(struct vc_data *vc, int do_clear)
1603 {
1604 vc->vc_top = 0;
1605 vc->vc_bottom = vc->vc_rows;
1606 vc->vc_state = ESnormal;
1607 vc->vc_ques = 0;
1608 vc->vc_translate = set_translate(LAT1_MAP, vc);
1609 vc->vc_G0_charset = LAT1_MAP;
1610 vc->vc_G1_charset = GRAF_MAP;
1611 vc->vc_charset = 0;
1612 vc->vc_need_wrap = 0;
1613 vc->vc_report_mouse = 0;
1614 vc->vc_utf = default_utf8;
1615 vc->vc_utf_count = 0;
1616
1617 vc->vc_disp_ctrl = 0;
1618 vc->vc_toggle_meta = 0;
1619
1620 vc->vc_decscnm = 0;
1621 vc->vc_decom = 0;
1622 vc->vc_decawm = 1;
1623 vc->vc_deccm = 1;
1624 vc->vc_decim = 0;
1625
1626 set_kbd(vc, decarm);
1627 clr_kbd(vc, decckm);
1628 clr_kbd(vc, kbdapplic);
1629 clr_kbd(vc, lnm);
1630 kbd_table[vc->vc_num].lockstate = 0;
1631 kbd_table[vc->vc_num].slockstate = 0;
1632 kbd_table[vc->vc_num].ledmode = LED_SHOW_FLAGS;
1633 kbd_table[vc->vc_num].ledflagstate = kbd_table[vc->vc_num].default_ledflagstate;
1634 /* do not do set_leds here because this causes an endless tasklet loop
1635 when the keyboard hasn't been initialized yet */
1636
1637 vc->vc_cursor_type = CUR_DEFAULT;
1638 vc->vc_complement_mask = vc->vc_s_complement_mask;
1639
1640 default_attr(vc);
1641 update_attr(vc);
1642
1643 vc->vc_tab_stop[0] = 0x01010100;
1644 vc->vc_tab_stop[1] =
1645 vc->vc_tab_stop[2] =
1646 vc->vc_tab_stop[3] =
1647 vc->vc_tab_stop[4] = 0x01010101;
1648
1649 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1650 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1651
1652 gotoxy(vc, 0, 0);
1653 save_cur(vc);
1654 if (do_clear)
1655 csi_J(vc, 2);
1656 }
1657
1658 /* console_sem is held */
1659 static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
1660 {
1661 /*
1662 * Control characters can be used in the _middle_
1663 * of an escape sequence.
1664 */
1665 switch (c) {
1666 case 0:
1667 return;
1668 case 7:
1669 if (vc->vc_bell_duration)
1670 kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration);
1671 return;
1672 case 8:
1673 bs(vc);
1674 return;
1675 case 9:
1676 vc->vc_pos -= (vc->vc_x << 1);
1677 while (vc->vc_x < vc->vc_cols - 1) {
1678 vc->vc_x++;
1679 if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31)))
1680 break;
1681 }
1682 vc->vc_pos += (vc->vc_x << 1);
1683 notify_write(vc, '\t');
1684 return;
1685 case 10: case 11: case 12:
1686 lf(vc);
1687 if (!is_kbd(vc, lnm))
1688 return;
1689 case 13:
1690 cr(vc);
1691 return;
1692 case 14:
1693 vc->vc_charset = 1;
1694 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1695 vc->vc_disp_ctrl = 1;
1696 return;
1697 case 15:
1698 vc->vc_charset = 0;
1699 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1700 vc->vc_disp_ctrl = 0;
1701 return;
1702 case 24: case 26:
1703 vc->vc_state = ESnormal;
1704 return;
1705 case 27:
1706 vc->vc_state = ESesc;
1707 return;
1708 case 127:
1709 del(vc);
1710 return;
1711 case 128+27:
1712 vc->vc_state = ESsquare;
1713 return;
1714 }
1715 switch(vc->vc_state) {
1716 case ESesc:
1717 vc->vc_state = ESnormal;
1718 switch (c) {
1719 case '[':
1720 vc->vc_state = ESsquare;
1721 return;
1722 case ']':
1723 vc->vc_state = ESnonstd;
1724 return;
1725 case '%':
1726 vc->vc_state = ESpercent;
1727 return;
1728 case 'E':
1729 cr(vc);
1730 lf(vc);
1731 return;
1732 case 'M':
1733 ri(vc);
1734 return;
1735 case 'D':
1736 lf(vc);
1737 return;
1738 case 'H':
1739 vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31));
1740 return;
1741 case 'Z':
1742 respond_ID(tty);
1743 return;
1744 case '7':
1745 save_cur(vc);
1746 return;
1747 case '8':
1748 restore_cur(vc);
1749 return;
1750 case '(':
1751 vc->vc_state = ESsetG0;
1752 return;
1753 case ')':
1754 vc->vc_state = ESsetG1;
1755 return;
1756 case '#':
1757 vc->vc_state = EShash;
1758 return;
1759 case 'c':
1760 reset_terminal(vc, 1);
1761 return;
1762 case '>': /* Numeric keypad */
1763 clr_kbd(vc, kbdapplic);
1764 return;
1765 case '=': /* Appl. keypad */
1766 set_kbd(vc, kbdapplic);
1767 return;
1768 }
1769 return;
1770 case ESnonstd:
1771 if (c=='P') { /* palette escape sequence */
1772 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1773 vc->vc_par[vc->vc_npar] = 0;
1774 vc->vc_npar = 0;
1775 vc->vc_state = ESpalette;
1776 return;
1777 } else if (c=='R') { /* reset palette */
1778 reset_palette(vc);
1779 vc->vc_state = ESnormal;
1780 } else
1781 vc->vc_state = ESnormal;
1782 return;
1783 case ESpalette:
1784 if ( (c>='0'&&c<='9') || (c>='A'&&c<='F') || (c>='a'&&c<='f') ) {
1785 vc->vc_par[vc->vc_npar++] = (c > '9' ? (c & 0xDF) - 'A' + 10 : c - '0');
1786 if (vc->vc_npar == 7) {
1787 int i = vc->vc_par[0] * 3, j = 1;
1788 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1789 vc->vc_palette[i++] += vc->vc_par[j++];
1790 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1791 vc->vc_palette[i++] += vc->vc_par[j++];
1792 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1793 vc->vc_palette[i] += vc->vc_par[j];
1794 set_palette(vc);
1795 vc->vc_state = ESnormal;
1796 }
1797 } else
1798 vc->vc_state = ESnormal;
1799 return;
1800 case ESsquare:
1801 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1802 vc->vc_par[vc->vc_npar] = 0;
1803 vc->vc_npar = 0;
1804 vc->vc_state = ESgetpars;
1805 if (c == '[') { /* Function key */
1806 vc->vc_state=ESfunckey;
1807 return;
1808 }
1809 vc->vc_ques = (c == '?');
1810 if (vc->vc_ques)
1811 return;
1812 case ESgetpars:
1813 if (c == ';' && vc->vc_npar < NPAR - 1) {
1814 vc->vc_npar++;
1815 return;
1816 } else if (c>='0' && c<='9') {
1817 vc->vc_par[vc->vc_npar] *= 10;
1818 vc->vc_par[vc->vc_npar] += c - '0';
1819 return;
1820 } else
1821 vc->vc_state = ESgotpars;
1822 case ESgotpars:
1823 vc->vc_state = ESnormal;
1824 switch(c) {
1825 case 'h':
1826 set_mode(vc, 1);
1827 return;
1828 case 'l':
1829 set_mode(vc, 0);
1830 return;
1831 case 'c':
1832 if (vc->vc_ques) {
1833 if (vc->vc_par[0])
1834 vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16);
1835 else
1836 vc->vc_cursor_type = CUR_DEFAULT;
1837 return;
1838 }
1839 break;
1840 case 'm':
1841 if (vc->vc_ques) {
1842 clear_selection();
1843 if (vc->vc_par[0])
1844 vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1];
1845 else
1846 vc->vc_complement_mask = vc->vc_s_complement_mask;
1847 return;
1848 }
1849 break;
1850 case 'n':
1851 if (!vc->vc_ques) {
1852 if (vc->vc_par[0] == 5)
1853 status_report(tty);
1854 else if (vc->vc_par[0] == 6)
1855 cursor_report(vc, tty);
1856 }
1857 return;
1858 }
1859 if (vc->vc_ques) {
1860 vc->vc_ques = 0;
1861 return;
1862 }
1863 switch(c) {
1864 case 'G': case '`':
1865 if (vc->vc_par[0])
1866 vc->vc_par[0]--;
1867 gotoxy(vc, vc->vc_par[0], vc->vc_y);
1868 return;
1869 case 'A':
1870 if (!vc->vc_par[0])
1871 vc->vc_par[0]++;
1872 gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]);
1873 return;
1874 case 'B': case 'e':
1875 if (!vc->vc_par[0])
1876 vc->vc_par[0]++;
1877 gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]);
1878 return;
1879 case 'C': case 'a':
1880 if (!vc->vc_par[0])
1881 vc->vc_par[0]++;
1882 gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y);
1883 return;
1884 case 'D':
1885 if (!vc->vc_par[0])
1886 vc->vc_par[0]++;
1887 gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y);
1888 return;
1889 case 'E':
1890 if (!vc->vc_par[0])
1891 vc->vc_par[0]++;
1892 gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]);
1893 return;
1894 case 'F':
1895 if (!vc->vc_par[0])
1896 vc->vc_par[0]++;
1897 gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]);
1898 return;
1899 case 'd':
1900 if (vc->vc_par[0])
1901 vc->vc_par[0]--;
1902 gotoxay(vc, vc->vc_x ,vc->vc_par[0]);
1903 return;
1904 case 'H': case 'f':
1905 if (vc->vc_par[0])
1906 vc->vc_par[0]--;
1907 if (vc->vc_par[1])
1908 vc->vc_par[1]--;
1909 gotoxay(vc, vc->vc_par[1], vc->vc_par[0]);
1910 return;
1911 case 'J':
1912 csi_J(vc, vc->vc_par[0]);
1913 return;
1914 case 'K':
1915 csi_K(vc, vc->vc_par[0]);
1916 return;
1917 case 'L':
1918 csi_L(vc, vc->vc_par[0]);
1919 return;
1920 case 'M':
1921 csi_M(vc, vc->vc_par[0]);
1922 return;
1923 case 'P':
1924 csi_P(vc, vc->vc_par[0]);
1925 return;
1926 case 'c':
1927 if (!vc->vc_par[0])
1928 respond_ID(tty);
1929 return;
1930 case 'g':
1931 if (!vc->vc_par[0])
1932 vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31));
1933 else if (vc->vc_par[0] == 3) {
1934 vc->vc_tab_stop[0] =
1935 vc->vc_tab_stop[1] =
1936 vc->vc_tab_stop[2] =
1937 vc->vc_tab_stop[3] =
1938 vc->vc_tab_stop[4] = 0;
1939 }
1940 return;
1941 case 'm':
1942 csi_m(vc);
1943 return;
1944 case 'q': /* DECLL - but only 3 leds */
1945 /* map 0,1,2,3 to 0,1,2,4 */
1946 if (vc->vc_par[0] < 4)
1947 setledstate(kbd_table + vc->vc_num,
1948 (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4);
1949 return;
1950 case 'r':
1951 if (!vc->vc_par[0])
1952 vc->vc_par[0]++;
1953 if (!vc->vc_par[1])
1954 vc->vc_par[1] = vc->vc_rows;
1955 /* Minimum allowed region is 2 lines */
1956 if (vc->vc_par[0] < vc->vc_par[1] &&
1957 vc->vc_par[1] <= vc->vc_rows) {
1958 vc->vc_top = vc->vc_par[0] - 1;
1959 vc->vc_bottom = vc->vc_par[1];
1960 gotoxay(vc, 0, 0);
1961 }
1962 return;
1963 case 's':
1964 save_cur(vc);
1965 return;
1966 case 'u':
1967 restore_cur(vc);
1968 return;
1969 case 'X':
1970 csi_X(vc, vc->vc_par[0]);
1971 return;
1972 case '@':
1973 csi_at(vc, vc->vc_par[0]);
1974 return;
1975 case ']': /* setterm functions */
1976 setterm_command(vc);
1977 return;
1978 }
1979 return;
1980 case ESpercent:
1981 vc->vc_state = ESnormal;
1982 switch (c) {
1983 case '@': /* defined in ISO 2022 */
1984 vc->vc_utf = 0;
1985 return;
1986 case 'G': /* prelim official escape code */
1987 case '8': /* retained for compatibility */
1988 vc->vc_utf = 1;
1989 return;
1990 }
1991 return;
1992 case ESfunckey:
1993 vc->vc_state = ESnormal;
1994 return;
1995 case EShash:
1996 vc->vc_state = ESnormal;
1997 if (c == '8') {
1998 /* DEC screen alignment test. kludge :-) */
1999 vc->vc_video_erase_char =
2000 (vc->vc_video_erase_char & 0xff00) | 'E';
2001 csi_J(vc, 2);
2002 vc->vc_video_erase_char =
2003 (vc->vc_video_erase_char & 0xff00) | ' ';
2004 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
2005 }
2006 return;
2007 case ESsetG0:
2008 if (c == '0')
2009 vc->vc_G0_charset = GRAF_MAP;
2010 else if (c == 'B')
2011 vc->vc_G0_charset = LAT1_MAP;
2012 else if (c == 'U')
2013 vc->vc_G0_charset = IBMPC_MAP;
2014 else if (c == 'K')
2015 vc->vc_G0_charset = USER_MAP;
2016 if (vc->vc_charset == 0)
2017 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
2018 vc->vc_state = ESnormal;
2019 return;
2020 case ESsetG1:
2021 if (c == '0')
2022 vc->vc_G1_charset = GRAF_MAP;
2023 else if (c == 'B')
2024 vc->vc_G1_charset = LAT1_MAP;
2025 else if (c == 'U')
2026 vc->vc_G1_charset = IBMPC_MAP;
2027 else if (c == 'K')
2028 vc->vc_G1_charset = USER_MAP;
2029 if (vc->vc_charset == 1)
2030 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
2031 vc->vc_state = ESnormal;
2032 return;
2033 default:
2034 vc->vc_state = ESnormal;
2035 }
2036 }
2037
2038 /* This is a temporary buffer used to prepare a tty console write
2039 * so that we can easily avoid touching user space while holding the
2040 * console spinlock. It is allocated in con_init and is shared by
2041 * this code and the vc_screen read/write tty calls.
2042 *
2043 * We have to allocate this statically in the kernel data section
2044 * since console_init (and thus con_init) are called before any
2045 * kernel memory allocation is available.
2046 */
2047 char con_buf[CON_BUF_SIZE];
2048 DEFINE_MUTEX(con_buf_mtx);
2049
2050 /* is_double_width() is based on the wcwidth() implementation by
2051 * Markus Kuhn -- 2007-05-26 (Unicode 5.0)
2052 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
2053 */
2054 struct interval {
2055 uint32_t first;
2056 uint32_t last;
2057 };
2058
2059 static int bisearch(uint32_t ucs, const struct interval *table, int max)
2060 {
2061 int min = 0;
2062 int mid;
2063
2064 if (ucs < table[0].first || ucs > table[max].last)
2065 return 0;
2066 while (max >= min) {
2067 mid = (min + max) / 2;
2068 if (ucs > table[mid].last)
2069 min = mid + 1;
2070 else if (ucs < table[mid].first)
2071 max = mid - 1;
2072 else
2073 return 1;
2074 }
2075 return 0;
2076 }
2077
2078 static int is_double_width(uint32_t ucs)
2079 {
2080 static const struct interval double_width[] = {
2081 { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E },
2082 { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF },
2083 { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 },
2084 { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD }
2085 };
2086 return bisearch(ucs, double_width, ARRAY_SIZE(double_width) - 1);
2087 }
2088
2089 /* acquires console_sem */
2090 static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2091 {
2092 #ifdef VT_BUF_VRAM_ONLY
2093 #define FLUSH do { } while(0);
2094 #else
2095 #define FLUSH if (draw_x >= 0) { \
2096 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
2097 draw_x = -1; \
2098 }
2099 #endif
2100
2101 int c, tc, ok, n = 0, draw_x = -1;
2102 unsigned int currcons;
2103 unsigned long draw_from = 0, draw_to = 0;
2104 struct vc_data *vc;
2105 unsigned char vc_attr;
2106 struct vt_notifier_param param;
2107 uint8_t rescan;
2108 uint8_t inverse;
2109 uint8_t width;
2110 u16 himask, charmask;
2111 const unsigned char *orig_buf = NULL;
2112 int orig_count;
2113
2114 if (in_interrupt())
2115 return count;
2116
2117 might_sleep();
2118
2119 acquire_console_sem();
2120 vc = tty->driver_data;
2121 if (vc == NULL) {
2122 printk(KERN_ERR "vt: argh, driver_data is NULL !\n");
2123 release_console_sem();
2124 return 0;
2125 }
2126
2127 currcons = vc->vc_num;
2128 if (!vc_cons_allocated(currcons)) {
2129 /* could this happen? */
2130 static int error = 0;
2131 if (!error) {
2132 error = 1;
2133 printk("con_write: tty %d not allocated\n", currcons+1);
2134 }
2135 release_console_sem();
2136 return 0;
2137 }
2138 release_console_sem();
2139
2140 orig_buf = buf;
2141 orig_count = count;
2142
2143 /* At this point 'buf' is guaranteed to be a kernel buffer
2144 * and therefore no access to userspace (and therefore sleeping)
2145 * will be needed. The con_buf_mtx serializes all tty based
2146 * console rendering and vcs write/read operations. We hold
2147 * the console spinlock during the entire write.
2148 */
2149
2150 acquire_console_sem();
2151
2152 vc = tty->driver_data;
2153 if (vc == NULL) {
2154 printk(KERN_ERR "vt: argh, driver_data _became_ NULL !\n");
2155 release_console_sem();
2156 goto out;
2157 }
2158
2159 himask = vc->vc_hi_font_mask;
2160 charmask = himask ? 0x1ff : 0xff;
2161
2162 /* undraw cursor first */
2163 if (IS_FG(vc))
2164 hide_cursor(vc);
2165
2166 param.vc = vc;
2167
2168 while (!tty->stopped && count) {
2169 int orig = *buf;
2170 c = orig;
2171 buf++;
2172 n++;
2173 count--;
2174 rescan = 0;
2175 inverse = 0;
2176 width = 1;
2177
2178 /* Do no translation at all in control states */
2179 if (vc->vc_state != ESnormal) {
2180 tc = c;
2181 } else if (vc->vc_utf && !vc->vc_disp_ctrl) {
2182 /* Combine UTF-8 into Unicode in vc_utf_char.
2183 * vc_utf_count is the number of continuation bytes still
2184 * expected to arrive.
2185 * vc_npar is the number of continuation bytes arrived so
2186 * far
2187 */
2188 rescan_last_byte:
2189 if ((c & 0xc0) == 0x80) {
2190 /* Continuation byte received */
2191 static const uint32_t utf8_length_changes[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff };
2192 if (vc->vc_utf_count) {
2193 vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f);
2194 vc->vc_npar++;
2195 if (--vc->vc_utf_count) {
2196 /* Still need some bytes */
2197 continue;
2198 }
2199 /* Got a whole character */
2200 c = vc->vc_utf_char;
2201 /* Reject overlong sequences */
2202 if (c <= utf8_length_changes[vc->vc_npar - 1] ||
2203 c > utf8_length_changes[vc->vc_npar])
2204 c = 0xfffd;
2205 } else {
2206 /* Unexpected continuation byte */
2207 vc->vc_utf_count = 0;
2208 c = 0xfffd;
2209 }
2210 } else {
2211 /* Single ASCII byte or first byte of a sequence received */
2212 if (vc->vc_utf_count) {
2213 /* Continuation byte expected */
2214 rescan = 1;
2215 vc->vc_utf_count = 0;
2216 c = 0xfffd;
2217 } else if (c > 0x7f) {
2218 /* First byte of a multibyte sequence received */
2219 vc->vc_npar = 0;
2220 if ((c & 0xe0) == 0xc0) {
2221 vc->vc_utf_count = 1;
2222 vc->vc_utf_char = (c & 0x1f);
2223 } else if ((c & 0xf0) == 0xe0) {
2224 vc->vc_utf_count = 2;
2225 vc->vc_utf_char = (c & 0x0f);
2226 } else if ((c & 0xf8) == 0xf0) {
2227 vc->vc_utf_count = 3;
2228 vc->vc_utf_char = (c & 0x07);
2229 } else if ((c & 0xfc) == 0xf8) {
2230 vc->vc_utf_count = 4;
2231 vc->vc_utf_char = (c & 0x03);
2232 } else if ((c & 0xfe) == 0xfc) {
2233 vc->vc_utf_count = 5;
2234 vc->vc_utf_char = (c & 0x01);
2235 } else {
2236 /* 254 and 255 are invalid */
2237 c = 0xfffd;
2238 }
2239 if (vc->vc_utf_count) {
2240 /* Still need some bytes */
2241 continue;
2242 }
2243 }
2244 /* Nothing to do if an ASCII byte was received */
2245 }
2246 /* End of UTF-8 decoding. */
2247 /* c is the received character, or U+FFFD for invalid sequences. */
2248 /* Replace invalid Unicode code points with U+FFFD too */
2249 if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff)
2250 c = 0xfffd;
2251 tc = c;
2252 } else { /* no utf or alternate charset mode */
2253 tc = vc_translate(vc, c);
2254 }
2255
2256 param.c = tc;
2257 if (atomic_notifier_call_chain(&vt_notifier_list, VT_PREWRITE,
2258 &param) == NOTIFY_STOP)
2259 continue;
2260
2261 /* If the original code was a control character we
2262 * only allow a glyph to be displayed if the code is
2263 * not normally used (such as for cursor movement) or
2264 * if the disp_ctrl mode has been explicitly enabled.
2265 * Certain characters (as given by the CTRL_ALWAYS
2266 * bitmap) are always displayed as control characters,
2267 * as the console would be pretty useless without
2268 * them; to display an arbitrary font position use the
2269 * direct-to-font zone in UTF-8 mode.
2270 */
2271 ok = tc && (c >= 32 ||
2272 !(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 :
2273 vc->vc_utf || ((CTRL_ACTION >> c) & 1)))
2274 && (c != 127 || vc->vc_disp_ctrl)
2275 && (c != 128+27);
2276
2277 if (vc->vc_state == ESnormal && ok) {
2278 if (vc->vc_utf && !vc->vc_disp_ctrl) {
2279 if (is_double_width(c))
2280 width = 2;
2281 }
2282 /* Now try to find out how to display it */
2283 tc = conv_uni_to_pc(vc, tc);
2284 if (tc & ~charmask) {
2285 if (tc == -1 || tc == -2) {
2286 continue; /* nothing to display */
2287 }
2288 /* Glyph not found */
2289 if ((!(vc->vc_utf && !vc->vc_disp_ctrl) && c < 128) && !(c & ~charmask)) {
2290 /* In legacy mode use the glyph we get by a 1:1 mapping.
2291 This would make absolutely no sense with Unicode in mind,
2292 but do this for ASCII characters since a font may lack
2293 Unicode mapping info and we don't want to end up with
2294 having question marks only. */
2295 tc = c;
2296 } else {
2297 /* Display U+FFFD. If it's not found, display an inverse question mark. */
2298 tc = conv_uni_to_pc(vc, 0xfffd);
2299 if (tc < 0) {
2300 inverse = 1;
2301 tc = conv_uni_to_pc(vc, '?');
2302 if (tc < 0) tc = '?';
2303 }
2304 }
2305 }
2306
2307 if (!inverse) {
2308 vc_attr = vc->vc_attr;
2309 } else {
2310 /* invert vc_attr */
2311 if (!vc->vc_can_do_color) {
2312 vc_attr = (vc->vc_attr) ^ 0x08;
2313 } else if (vc->vc_hi_font_mask == 0x100) {
2314 vc_attr = ((vc->vc_attr) & 0x11) | (((vc->vc_attr) & 0xe0) >> 4) | (((vc->vc_attr) & 0x0e) << 4);
2315 } else {
2316 vc_attr = ((vc->vc_attr) & 0x88) | (((vc->vc_attr) & 0x70) >> 4) | (((vc->vc_attr) & 0x07) << 4);
2317 }
2318 FLUSH
2319 }
2320
2321 while (1) {
2322 if (vc->vc_need_wrap || vc->vc_decim)
2323 FLUSH
2324 if (vc->vc_need_wrap) {
2325 cr(vc);
2326 lf(vc);
2327 }
2328 if (vc->vc_decim)
2329 insert_char(vc, 1);
2330 scr_writew(himask ?
2331 ((vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) :
2332 (vc_attr << 8) + tc,
2333 (u16 *) vc->vc_pos);
2334 if (DO_UPDATE(vc) && draw_x < 0) {
2335 draw_x = vc->vc_x;
2336 draw_from = vc->vc_pos;
2337 }
2338 if (vc->vc_x == vc->vc_cols - 1) {
2339 vc->vc_need_wrap = vc->vc_decawm;
2340 draw_to = vc->vc_pos + 2;
2341 } else {
2342 vc->vc_x++;
2343 draw_to = (vc->vc_pos += 2);
2344 }
2345
2346 if (!--width) break;
2347
2348 tc = conv_uni_to_pc(vc, ' '); /* A space is printed in the second column */
2349 if (tc < 0) tc = ' ';
2350 }
2351 notify_write(vc, c);
2352
2353 if (inverse) {
2354 FLUSH
2355 }
2356
2357 if (rescan) {
2358 rescan = 0;
2359 inverse = 0;
2360 width = 1;
2361 c = orig;
2362 goto rescan_last_byte;
2363 }
2364 continue;
2365 }
2366 FLUSH
2367 do_con_trol(tty, vc, orig);
2368 }
2369 FLUSH
2370 console_conditional_schedule();
2371 release_console_sem();
2372
2373 out:
2374 notify_update(vc);
2375 return n;
2376 #undef FLUSH
2377 }
2378
2379 /*
2380 * This is the console switching callback.
2381 *
2382 * Doing console switching in a process context allows
2383 * us to do the switches asynchronously (needed when we want
2384 * to switch due to a keyboard interrupt). Synchronization
2385 * with other console code and prevention of re-entrancy is
2386 * ensured with console_sem.
2387 */
2388 static void console_callback(struct work_struct *ignored)
2389 {
2390 acquire_console_sem();
2391
2392 if (want_console >= 0) {
2393 if (want_console != fg_console &&
2394 vc_cons_allocated(want_console)) {
2395 hide_cursor(vc_cons[fg_console].d);
2396 change_console(vc_cons[want_console].d);
2397 /* we only changed when the console had already
2398 been allocated - a new console is not created
2399 in an interrupt routine */
2400 }
2401 want_console = -1;
2402 }
2403 if (do_poke_blanked_console) { /* do not unblank for a LED change */
2404 do_poke_blanked_console = 0;
2405 poke_blanked_console();
2406 }
2407 if (scrollback_delta) {
2408 struct vc_data *vc = vc_cons[fg_console].d;
2409 clear_selection();
2410 if (vc->vc_mode == KD_TEXT)
2411 vc->vc_sw->con_scrolldelta(vc, scrollback_delta);
2412 scrollback_delta = 0;
2413 }
2414 if (blank_timer_expired) {
2415 do_blank_screen(0);
2416 blank_timer_expired = 0;
2417 }
2418 notify_update(vc_cons[fg_console].d);
2419
2420 release_console_sem();
2421 }
2422
2423 int set_console(int nr)
2424 {
2425 struct vc_data *vc = vc_cons[fg_console].d;
2426
2427 if (!vc_cons_allocated(nr) || vt_dont_switch ||
2428 (vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) {
2429
2430 /*
2431 * Console switch will fail in console_callback() or
2432 * change_console() so there is no point scheduling
2433 * the callback
2434 *
2435 * Existing set_console() users don't check the return
2436 * value so this shouldn't break anything
2437 */
2438 return -EINVAL;
2439 }
2440
2441 want_console = nr;
2442 schedule_console_callback();
2443
2444 return 0;
2445 }
2446
2447 struct tty_driver *console_driver;
2448
2449 #ifdef CONFIG_VT_CONSOLE
2450
2451 /*
2452 * Console on virtual terminal
2453 *
2454 * The console must be locked when we get here.
2455 */
2456
2457 static void vt_console_print(struct console *co, const char *b, unsigned count)
2458 {
2459 struct vc_data *vc = vc_cons[fg_console].d;
2460 unsigned char c;
2461 static DEFINE_SPINLOCK(printing_lock);
2462 const ushort *start;
2463 ushort cnt = 0;
2464 ushort myx;
2465
2466 /* console busy or not yet initialized */
2467 if (!printable)
2468 return;
2469 if (!spin_trylock(&printing_lock))
2470 return;
2471
2472 if (kmsg_redirect && vc_cons_allocated(kmsg_redirect - 1))
2473 vc = vc_cons[kmsg_redirect - 1].d;
2474
2475 /* read `x' only after setting currcons properly (otherwise
2476 the `x' macro will read the x of the foreground console). */
2477 myx = vc->vc_x;
2478
2479 if (!vc_cons_allocated(fg_console)) {
2480 /* impossible */
2481 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2482 goto quit;
2483 }
2484
2485 if (vc->vc_mode != KD_TEXT)
2486 goto quit;
2487
2488 /* undraw cursor first */
2489 if (IS_FG(vc))
2490 hide_cursor(vc);
2491
2492 start = (ushort *)vc->vc_pos;
2493
2494 /* Contrived structure to try to emulate original need_wrap behaviour
2495 * Problems caused when we have need_wrap set on '\n' character */
2496 while (count--) {
2497 c = *b++;
2498 if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) {
2499 if (cnt > 0) {
2500 if (CON_IS_VISIBLE(vc))
2501 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2502 vc->vc_x += cnt;
2503 if (vc->vc_need_wrap)
2504 vc->vc_x--;
2505 cnt = 0;
2506 }
2507 if (c == 8) { /* backspace */
2508 bs(vc);
2509 start = (ushort *)vc->vc_pos;
2510 myx = vc->vc_x;
2511 continue;
2512 }
2513 if (c != 13)
2514 lf(vc);
2515 cr(vc);
2516 start = (ushort *)vc->vc_pos;
2517 myx = vc->vc_x;
2518 if (c == 10 || c == 13)
2519 continue;
2520 }
2521 scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos);
2522 notify_write(vc, c);
2523 cnt++;
2524 if (myx == vc->vc_cols - 1) {
2525 vc->vc_need_wrap = 1;
2526 continue;
2527 }
2528 vc->vc_pos += 2;
2529 myx++;
2530 }
2531 if (cnt > 0) {
2532 if (CON_IS_VISIBLE(vc))
2533 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2534 vc->vc_x += cnt;
2535 if (vc->vc_x == vc->vc_cols) {
2536 vc->vc_x--;
2537 vc->vc_need_wrap = 1;
2538 }
2539 }
2540 set_cursor(vc);
2541 notify_update(vc);
2542
2543 quit:
2544 spin_unlock(&printing_lock);
2545 }
2546
2547 static struct tty_driver *vt_console_device(struct console *c, int *index)
2548 {
2549 *index = c->index ? c->index-1 : fg_console;
2550 return console_driver;
2551 }
2552
2553 static struct console vt_console_driver = {
2554 .name = "tty",
2555 .write = vt_console_print,
2556 .device = vt_console_device,
2557 .unblank = unblank_screen,
2558 .flags = CON_PRINTBUFFER,
2559 .index = -1,
2560 };
2561 #endif
2562
2563 /*
2564 * Handling of Linux-specific VC ioctls
2565 */
2566
2567 /*
2568 * Generally a bit racy with respect to console_sem().
2569 *
2570 * There are some functions which don't need it.
2571 *
2572 * There are some functions which can sleep for arbitrary periods
2573 * (paste_selection) but we don't need the lock there anyway.
2574 *
2575 * set_selection has locking, and definitely needs it
2576 */
2577
2578 int tioclinux(struct tty_struct *tty, unsigned long arg)
2579 {
2580 char type, data;
2581 char __user *p = (char __user *)arg;
2582 int lines;
2583 int ret;
2584
2585 if (tty->driver->type != TTY_DRIVER_TYPE_CONSOLE)
2586 return -EINVAL;
2587 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN))
2588 return -EPERM;
2589 if (get_user(type, p))
2590 return -EFAULT;
2591 ret = 0;
2592
2593 lock_kernel();
2594
2595 switch (type)
2596 {
2597 case TIOCL_SETSEL:
2598 acquire_console_sem();
2599 ret = set_selection((struct tiocl_selection __user *)(p+1), tty);
2600 release_console_sem();
2601 break;
2602 case TIOCL_PASTESEL:
2603 ret = paste_selection(tty);
2604 break;
2605 case TIOCL_UNBLANKSCREEN:
2606 acquire_console_sem();
2607 unblank_screen();
2608 release_console_sem();
2609 break;
2610 case TIOCL_SELLOADLUT:
2611 ret = sel_loadlut(p);
2612 break;
2613 case TIOCL_GETSHIFTSTATE:
2614
2615 /*
2616 * Make it possible to react to Shift+Mousebutton.
2617 * Note that 'shift_state' is an undocumented
2618 * kernel-internal variable; programs not closely
2619 * related to the kernel should not use this.
2620 */
2621 data = shift_state;
2622 ret = __put_user(data, p);
2623 break;
2624 case TIOCL_GETMOUSEREPORTING:
2625 data = mouse_reporting();
2626 ret = __put_user(data, p);
2627 break;
2628 case TIOCL_SETVESABLANK:
2629 ret = set_vesa_blanking(p);
2630 break;
2631 case TIOCL_GETKMSGREDIRECT:
2632 data = kmsg_redirect;
2633 ret = __put_user(data, p);
2634 break;
2635 case TIOCL_SETKMSGREDIRECT:
2636 if (!capable(CAP_SYS_ADMIN)) {
2637 ret = -EPERM;
2638 } else {
2639 if (get_user(data, p+1))
2640 ret = -EFAULT;
2641 else
2642 kmsg_redirect = data;
2643 }
2644 break;
2645 case TIOCL_GETFGCONSOLE:
2646 ret = fg_console;
2647 break;
2648 case TIOCL_SCROLLCONSOLE:
2649 if (get_user(lines, (s32 __user *)(p+4))) {
2650 ret = -EFAULT;
2651 } else {
2652 scrollfront(vc_cons[fg_console].d, lines);
2653 ret = 0;
2654 }
2655 break;
2656 case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
2657 acquire_console_sem();
2658 ignore_poke = 1;
2659 do_blank_screen(0);
2660 release_console_sem();
2661 break;
2662 case TIOCL_BLANKEDSCREEN:
2663 ret = console_blanked;
2664 break;
2665 default:
2666 ret = -EINVAL;
2667 break;
2668 }
2669 unlock_kernel();
2670 return ret;
2671 }
2672
2673 /*
2674 * /dev/ttyN handling
2675 */
2676
2677 static int con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2678 {
2679 int retval;
2680
2681 retval = do_con_write(tty, buf, count);
2682 con_flush_chars(tty);
2683
2684 return retval;
2685 }
2686
2687 static int con_put_char(struct tty_struct *tty, unsigned char ch)
2688 {
2689 if (in_interrupt())
2690 return 0; /* n_r3964 calls put_char() from interrupt context */
2691 return do_con_write(tty, &ch, 1);
2692 }
2693
2694 static int con_write_room(struct tty_struct *tty)
2695 {
2696 if (tty->stopped)
2697 return 0;
2698 return 4096; /* No limit, really; we're not buffering */
2699 }
2700
2701 static int con_chars_in_buffer(struct tty_struct *tty)
2702 {
2703 return 0; /* we're not buffering */
2704 }
2705
2706 /*
2707 * con_throttle and con_unthrottle are only used for
2708 * paste_selection(), which has to stuff in a large number of
2709 * characters...
2710 */
2711 static void con_throttle(struct tty_struct *tty)
2712 {
2713 }
2714
2715 static void con_unthrottle(struct tty_struct *tty)
2716 {
2717 struct vc_data *vc = tty->driver_data;
2718
2719 wake_up_interruptible(&vc->paste_wait);
2720 }
2721
2722 /*
2723 * Turn the Scroll-Lock LED on when the tty is stopped
2724 */
2725 static void con_stop(struct tty_struct *tty)
2726 {
2727 int console_num;
2728 if (!tty)
2729 return;
2730 console_num = tty->index;
2731 if (!vc_cons_allocated(console_num))
2732 return;
2733 set_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2734 set_leds();
2735 }
2736
2737 /*
2738 * Turn the Scroll-Lock LED off when the console is started
2739 */
2740 static void con_start(struct tty_struct *tty)
2741 {
2742 int console_num;
2743 if (!tty)
2744 return;
2745 console_num = tty->index;
2746 if (!vc_cons_allocated(console_num))
2747 return;
2748 clr_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2749 set_leds();
2750 }
2751
2752 static void con_flush_chars(struct tty_struct *tty)
2753 {
2754 struct vc_data *vc;
2755
2756 if (in_interrupt()) /* from flush_to_ldisc */
2757 return;
2758
2759 /* if we race with con_close(), vt may be null */
2760 acquire_console_sem();
2761 vc = tty->driver_data;
2762 if (vc)
2763 set_cursor(vc);
2764 release_console_sem();
2765 }
2766
2767 /*
2768 * Allocate the console screen memory.
2769 */
2770 static int con_open(struct tty_struct *tty, struct file *filp)
2771 {
2772 unsigned int currcons = tty->index;
2773 int ret = 0;
2774
2775 acquire_console_sem();
2776 if (tty->driver_data == NULL) {
2777 ret = vc_allocate(currcons);
2778 if (ret == 0) {
2779 struct vc_data *vc = vc_cons[currcons].d;
2780 tty->driver_data = vc;
2781 vc->vc_tty = tty;
2782
2783 if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
2784 tty->winsize.ws_row = vc_cons[currcons].d->vc_rows;
2785 tty->winsize.ws_col = vc_cons[currcons].d->vc_cols;
2786 }
2787 if (vc->vc_utf)
2788 tty->termios->c_iflag |= IUTF8;
2789 else
2790 tty->termios->c_iflag &= ~IUTF8;
2791 vcs_make_sysfs(tty);
2792 release_console_sem();
2793 return ret;
2794 }
2795 }
2796 release_console_sem();
2797 return ret;
2798 }
2799
2800 /*
2801 * We take tty_mutex in here to prevent another thread from coming in via init_dev
2802 * and taking a ref against the tty while we're in the process of forgetting
2803 * about it and cleaning things up.
2804 *
2805 * This is because vcs_remove_sysfs() can sleep and will drop the BKL.
2806 */
2807 static void con_close(struct tty_struct *tty, struct file *filp)
2808 {
2809 mutex_lock(&tty_mutex);
2810 acquire_console_sem();
2811 if (tty && tty->count == 1) {
2812 struct vc_data *vc = tty->driver_data;
2813
2814 if (vc)
2815 vc->vc_tty = NULL;
2816 tty->driver_data = NULL;
2817 vcs_remove_sysfs(tty);
2818 release_console_sem();
2819 mutex_unlock(&tty_mutex);
2820 /*
2821 * tty_mutex is released, but we still hold BKL, so there is
2822 * still exclusion against init_dev()
2823 */
2824 return;
2825 }
2826 release_console_sem();
2827 mutex_unlock(&tty_mutex);
2828 }
2829
2830 static int default_italic_color = 2; // green (ASCII)
2831 static int default_underline_color = 3; // cyan (ASCII)
2832 module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR);
2833 module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR);
2834
2835 static void vc_init(struct vc_data *vc, unsigned int rows,
2836 unsigned int cols, int do_clear)
2837 {
2838 int j, k ;
2839
2840 vc->vc_cols = cols;
2841 vc->vc_rows = rows;
2842 vc->vc_size_row = cols << 1;
2843 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
2844
2845 set_origin(vc);
2846 vc->vc_pos = vc->vc_origin;
2847 reset_vc(vc);
2848 for (j=k=0; j<16; j++) {
2849 vc->vc_palette[k++] = default_red[j] ;
2850 vc->vc_palette[k++] = default_grn[j] ;
2851 vc->vc_palette[k++] = default_blu[j] ;
2852 }
2853 vc->vc_def_color = 0x07; /* white */
2854 vc->vc_ulcolor = default_underline_color;
2855 vc->vc_itcolor = default_italic_color;
2856 vc->vc_halfcolor = 0x08; /* grey */
2857 init_waitqueue_head(&vc->paste_wait);
2858 reset_terminal(vc, do_clear);
2859 }
2860
2861 /*
2862 * This routine initializes console interrupts, and does nothing
2863 * else. If you want the screen to clear, call tty_write with
2864 * the appropriate escape-sequence.
2865 */
2866
2867 static int __init con_init(void)
2868 {
2869 const char *display_desc = NULL;
2870 struct vc_data *vc;
2871 unsigned int currcons = 0, i;
2872
2873 acquire_console_sem();
2874
2875 if (conswitchp)
2876 display_desc = conswitchp->con_startup();
2877 if (!display_desc) {
2878 fg_console = 0;
2879 release_console_sem();
2880 return 0;
2881 }
2882
2883 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2884 struct con_driver *con_driver = &registered_con_driver[i];
2885
2886 if (con_driver->con == NULL) {
2887 con_driver->con = conswitchp;
2888 con_driver->desc = display_desc;
2889 con_driver->flag = CON_DRIVER_FLAG_INIT;
2890 con_driver->first = 0;
2891 con_driver->last = MAX_NR_CONSOLES - 1;
2892 break;
2893 }
2894 }
2895
2896 for (i = 0; i < MAX_NR_CONSOLES; i++)
2897 con_driver_map[i] = conswitchp;
2898
2899 if (blankinterval) {
2900 blank_state = blank_normal_wait;
2901 mod_timer(&console_timer, jiffies + blankinterval);
2902 }
2903
2904 /*
2905 * kmalloc is not running yet - we use the bootmem allocator.
2906 */
2907 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) {
2908 vc_cons[currcons].d = vc = alloc_bootmem(sizeof(struct vc_data));
2909 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
2910 visual_init(vc, currcons, 1);
2911 vc->vc_screenbuf = (unsigned short *)alloc_bootmem(vc->vc_screenbuf_size);
2912 vc->vc_kmalloced = 0;
2913 vc_init(vc, vc->vc_rows, vc->vc_cols,
2914 currcons || !vc->vc_sw->con_save_screen);
2915 }
2916 currcons = fg_console = 0;
2917 master_display_fg = vc = vc_cons[currcons].d;
2918 set_origin(vc);
2919 save_screen(vc);
2920 gotoxy(vc, vc->vc_x, vc->vc_y);
2921 csi_J(vc, 0);
2922 update_screen(vc);
2923 printk("Console: %s %s %dx%d",
2924 vc->vc_can_do_color ? "colour" : "mono",
2925 display_desc, vc->vc_cols, vc->vc_rows);
2926 printable = 1;
2927 printk("\n");
2928
2929 release_console_sem();
2930
2931 #ifdef CONFIG_VT_CONSOLE
2932 register_console(&vt_console_driver);
2933 #endif
2934 return 0;
2935 }
2936 console_initcall(con_init);
2937
2938 static const struct tty_operations con_ops = {
2939 .open = con_open,
2940 .close = con_close,
2941 .write = con_write,
2942 .write_room = con_write_room,
2943 .put_char = con_put_char,
2944 .flush_chars = con_flush_chars,
2945 .chars_in_buffer = con_chars_in_buffer,
2946 .ioctl = vt_ioctl,
2947 .stop = con_stop,
2948 .start = con_start,
2949 .throttle = con_throttle,
2950 .unthrottle = con_unthrottle,
2951 .resize = vt_resize,
2952 };
2953
2954 int __init vty_init(void)
2955 {
2956 vcs_init();
2957
2958 console_driver = alloc_tty_driver(MAX_NR_CONSOLES);
2959 if (!console_driver)
2960 panic("Couldn't allocate console driver\n");
2961 console_driver->owner = THIS_MODULE;
2962 console_driver->name = "tty";
2963 console_driver->name_base = 1;
2964 console_driver->major = TTY_MAJOR;
2965 console_driver->minor_start = 1;
2966 console_driver->type = TTY_DRIVER_TYPE_CONSOLE;
2967 console_driver->init_termios = tty_std_termios;
2968 if (default_utf8)
2969 console_driver->init_termios.c_iflag |= IUTF8;
2970 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS;
2971 tty_set_operations(console_driver, &con_ops);
2972 if (tty_register_driver(console_driver))
2973 panic("Couldn't register console driver\n");
2974
2975 kbd_init();
2976 console_map_init();
2977 #ifdef CONFIG_PROM_CONSOLE
2978 prom_con_init();
2979 #endif
2980 #ifdef CONFIG_MDA_CONSOLE
2981 mda_console_init();
2982 #endif
2983 return 0;
2984 }
2985
2986 #ifndef VT_SINGLE_DRIVER
2987 #include <linux/device.h>
2988
2989 static struct class *vtconsole_class;
2990
2991 static int bind_con_driver(const struct consw *csw, int first, int last,
2992 int deflt)
2993 {
2994 struct module *owner = csw->owner;
2995 const char *desc = NULL;
2996 struct con_driver *con_driver;
2997 int i, j = -1, k = -1, retval = -ENODEV;
2998
2999 if (!try_module_get(owner))
3000 return -ENODEV;
3001
3002 acquire_console_sem();
3003
3004 /* check if driver is registered */
3005 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3006 con_driver = &registered_con_driver[i];
3007
3008 if (con_driver->con == csw) {
3009 desc = con_driver->desc;
3010 retval = 0;
3011 break;
3012 }
3013 }
3014
3015 if (retval)
3016 goto err;
3017
3018 if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) {
3019 csw->con_startup();
3020 con_driver->flag |= CON_DRIVER_FLAG_INIT;
3021 }
3022
3023 if (deflt) {
3024 if (conswitchp)
3025 module_put(conswitchp->owner);
3026
3027 __module_get(owner);
3028 conswitchp = csw;
3029 }
3030
3031 first = max(first, con_driver->first);
3032 last = min(last, con_driver->last);
3033
3034 for (i = first; i <= last; i++) {
3035 int old_was_color;
3036 struct vc_data *vc = vc_cons[i].d;
3037
3038 if (con_driver_map[i])
3039 module_put(con_driver_map[i]->owner);
3040 __module_get(owner);
3041 con_driver_map[i] = csw;
3042
3043 if (!vc || !vc->vc_sw)
3044 continue;
3045
3046 j = i;
3047
3048 if (CON_IS_VISIBLE(vc)) {
3049 k = i;
3050 save_screen(vc);
3051 }
3052
3053 old_was_color = vc->vc_can_do_color;
3054 vc->vc_sw->con_deinit(vc);
3055 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
3056 visual_init(vc, i, 0);
3057 set_origin(vc);
3058 update_attr(vc);
3059
3060 /* If the console changed between mono <-> color, then
3061 * the attributes in the screenbuf will be wrong. The
3062 * following resets all attributes to something sane.
3063 */
3064 if (old_was_color != vc->vc_can_do_color)
3065 clear_buffer_attributes(vc);
3066 }
3067
3068 printk("Console: switching ");
3069 if (!deflt)
3070 printk("consoles %d-%d ", first+1, last+1);
3071 if (j >= 0) {
3072 struct vc_data *vc = vc_cons[j].d;
3073
3074 printk("to %s %s %dx%d\n",
3075 vc->vc_can_do_color ? "colour" : "mono",
3076 desc, vc->vc_cols, vc->vc_rows);
3077
3078 if (k >= 0) {
3079 vc = vc_cons[k].d;
3080 update_screen(vc);
3081 }
3082 } else
3083 printk("to %s\n", desc);
3084
3085 retval = 0;
3086 err:
3087 release_console_sem();
3088 module_put(owner);
3089 return retval;
3090 };
3091
3092 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
3093 static int con_is_graphics(const struct consw *csw, int first, int last)
3094 {
3095 int i, retval = 0;
3096
3097 for (i = first; i <= last; i++) {
3098 struct vc_data *vc = vc_cons[i].d;
3099
3100 if (vc && vc->vc_mode == KD_GRAPHICS) {
3101 retval = 1;
3102 break;
3103 }
3104 }
3105
3106 return retval;
3107 }
3108
3109 /**
3110 * unbind_con_driver - unbind a console driver
3111 * @csw: pointer to console driver to unregister
3112 * @first: first in range of consoles that @csw should be unbound from
3113 * @last: last in range of consoles that @csw should be unbound from
3114 * @deflt: should next bound console driver be default after @csw is unbound?
3115 *
3116 * To unbind a driver from all possible consoles, pass 0 as @first and
3117 * %MAX_NR_CONSOLES as @last.
3118 *
3119 * @deflt controls whether the console that ends up replacing @csw should be
3120 * the default console.
3121 *
3122 * RETURNS:
3123 * -ENODEV if @csw isn't a registered console driver or can't be unregistered
3124 * or 0 on success.
3125 */
3126 int unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
3127 {
3128 struct module *owner = csw->owner;
3129 const struct consw *defcsw = NULL;
3130 struct con_driver *con_driver = NULL, *con_back = NULL;
3131 int i, retval = -ENODEV;
3132
3133 if (!try_module_get(owner))
3134 return -ENODEV;
3135
3136 acquire_console_sem();
3137
3138 /* check if driver is registered and if it is unbindable */
3139 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3140 con_driver = &registered_con_driver[i];
3141
3142 if (con_driver->con == csw &&
3143 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3144 retval = 0;
3145 break;
3146 }
3147 }
3148
3149 if (retval) {
3150 release_console_sem();
3151 goto err;
3152 }
3153
3154 retval = -ENODEV;
3155
3156 /* check if backup driver exists */
3157 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3158 con_back = &registered_con_driver[i];
3159
3160 if (con_back->con &&
3161 !(con_back->flag & CON_DRIVER_FLAG_MODULE)) {
3162 defcsw = con_back->con;
3163 retval = 0;
3164 break;
3165 }
3166 }
3167
3168 if (retval) {
3169 release_console_sem();
3170 goto err;
3171 }
3172
3173 if (!con_is_bound(csw)) {
3174 release_console_sem();
3175 goto err;
3176 }
3177
3178 first = max(first, con_driver->first);
3179 last = min(last, con_driver->last);
3180
3181 for (i = first; i <= last; i++) {
3182 if (con_driver_map[i] == csw) {
3183 module_put(csw->owner);
3184 con_driver_map[i] = NULL;
3185 }
3186 }
3187
3188 if (!con_is_bound(defcsw)) {
3189 const struct consw *defconsw = conswitchp;
3190
3191 defcsw->con_startup();
3192 con_back->flag |= CON_DRIVER_FLAG_INIT;
3193 /*
3194 * vgacon may change the default driver to point
3195 * to dummycon, we restore it here...
3196 */
3197 conswitchp = defconsw;
3198 }
3199
3200 if (!con_is_bound(csw))
3201 con_driver->flag &= ~CON_DRIVER_FLAG_INIT;
3202
3203 release_console_sem();
3204 /* ignore return value, binding should not fail */
3205 bind_con_driver(defcsw, first, last, deflt);
3206 err:
3207 module_put(owner);
3208 return retval;
3209
3210 }
3211 EXPORT_SYMBOL(unbind_con_driver);
3212
3213 static int vt_bind(struct con_driver *con)
3214 {
3215 const struct consw *defcsw = NULL, *csw = NULL;
3216 int i, more = 1, first = -1, last = -1, deflt = 0;
3217
3218 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3219 con_is_graphics(con->con, con->first, con->last))
3220 goto err;
3221
3222 csw = con->con;
3223
3224 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3225 struct con_driver *con = &registered_con_driver[i];
3226
3227 if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) {
3228 defcsw = con->con;
3229 break;
3230 }
3231 }
3232
3233 if (!defcsw)
3234 goto err;
3235
3236 while (more) {
3237 more = 0;
3238
3239 for (i = con->first; i <= con->last; i++) {
3240 if (con_driver_map[i] == defcsw) {
3241 if (first == -1)
3242 first = i;
3243 last = i;
3244 more = 1;
3245 } else if (first != -1)
3246 break;
3247 }
3248
3249 if (first == 0 && last == MAX_NR_CONSOLES -1)
3250 deflt = 1;
3251
3252 if (first != -1)
3253 bind_con_driver(csw, first, last, deflt);
3254
3255 first = -1;
3256 last = -1;
3257 deflt = 0;
3258 }
3259
3260 err:
3261 return 0;
3262 }
3263
3264 static int vt_unbind(struct con_driver *con)
3265 {
3266 const struct consw *csw = NULL;
3267 int i, more = 1, first = -1, last = -1, deflt = 0;
3268
3269 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3270 con_is_graphics(con->con, con->first, con->last))
3271 goto err;
3272
3273 csw = con->con;
3274
3275 while (more) {
3276 more = 0;
3277
3278 for (i = con->first; i <= con->last; i++) {
3279 if (con_driver_map[i] == csw) {
3280 if (first == -1)
3281 first = i;
3282 last = i;
3283 more = 1;
3284 } else if (first != -1)
3285 break;
3286 }
3287
3288 if (first == 0 && last == MAX_NR_CONSOLES -1)
3289 deflt = 1;
3290
3291 if (first != -1)
3292 unbind_con_driver(csw, first, last, deflt);
3293
3294 first = -1;
3295 last = -1;
3296 deflt = 0;
3297 }
3298
3299 err:
3300 return 0;
3301 }
3302 #else
3303 static inline int vt_bind(struct con_driver *con)
3304 {
3305 return 0;
3306 }
3307 static inline int vt_unbind(struct con_driver *con)
3308 {
3309 return 0;
3310 }
3311 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3312
3313 static ssize_t store_bind(struct device *dev, struct device_attribute *attr,
3314 const char *buf, size_t count)
3315 {
3316 struct con_driver *con = dev_get_drvdata(dev);
3317 int bind = simple_strtoul(buf, NULL, 0);
3318
3319 if (bind)
3320 vt_bind(con);
3321 else
3322 vt_unbind(con);
3323
3324 return count;
3325 }
3326
3327 static ssize_t show_bind(struct device *dev, struct device_attribute *attr,
3328 char *buf)
3329 {
3330 struct con_driver *con = dev_get_drvdata(dev);
3331 int bind = con_is_bound(con->con);
3332
3333 return snprintf(buf, PAGE_SIZE, "%i\n", bind);
3334 }
3335
3336 static ssize_t show_name(struct device *dev, struct device_attribute *attr,
3337 char *buf)
3338 {
3339 struct con_driver *con = dev_get_drvdata(dev);
3340
3341 return snprintf(buf, PAGE_SIZE, "%s %s\n",
3342 (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)",
3343 con->desc);
3344
3345 }
3346
3347 static struct device_attribute device_attrs[] = {
3348 __ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind),
3349 __ATTR(name, S_IRUGO, show_name, NULL),
3350 };
3351
3352 static int vtconsole_init_device(struct con_driver *con)
3353 {
3354 int i;
3355 int error = 0;
3356
3357 con->flag |= CON_DRIVER_FLAG_ATTR;
3358 dev_set_drvdata(con->dev, con);
3359 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3360 error = device_create_file(con->dev, &device_attrs[i]);
3361 if (error)
3362 break;
3363 }
3364
3365 if (error) {
3366 while (--i >= 0)
3367 device_remove_file(con->dev, &device_attrs[i]);
3368 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3369 }
3370
3371 return error;
3372 }
3373
3374 static void vtconsole_deinit_device(struct con_driver *con)
3375 {
3376 int i;
3377
3378 if (con->flag & CON_DRIVER_FLAG_ATTR) {
3379 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3380 device_remove_file(con->dev, &device_attrs[i]);
3381 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3382 }
3383 }
3384
3385 /**
3386 * con_is_bound - checks if driver is bound to the console
3387 * @csw: console driver
3388 *
3389 * RETURNS: zero if unbound, nonzero if bound
3390 *
3391 * Drivers can call this and if zero, they should release
3392 * all resources allocated on con_startup()
3393 */
3394 int con_is_bound(const struct consw *csw)
3395 {
3396 int i, bound = 0;
3397
3398 for (i = 0; i < MAX_NR_CONSOLES; i++) {
3399 if (con_driver_map[i] == csw) {
3400 bound = 1;
3401 break;
3402 }
3403 }
3404
3405 return bound;
3406 }
3407 EXPORT_SYMBOL(con_is_bound);
3408
3409 /**
3410 * register_con_driver - register console driver to console layer
3411 * @csw: console driver
3412 * @first: the first console to take over, minimum value is 0
3413 * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1
3414 *
3415 * DESCRIPTION: This function registers a console driver which can later
3416 * bind to a range of consoles specified by @first and @last. It will
3417 * also initialize the console driver by calling con_startup().
3418 */
3419 int register_con_driver(const struct consw *csw, int first, int last)
3420 {
3421 struct module *owner = csw->owner;
3422 struct con_driver *con_driver;
3423 const char *desc;
3424 int i, retval = 0;
3425
3426 if (!try_module_get(owner))
3427 return -ENODEV;
3428
3429 acquire_console_sem();
3430
3431 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3432 con_driver = &registered_con_driver[i];
3433
3434 /* already registered */
3435 if (con_driver->con == csw)
3436 retval = -EINVAL;
3437 }
3438
3439 if (retval)
3440 goto err;
3441
3442 desc = csw->con_startup();
3443
3444 if (!desc)
3445 goto err;
3446
3447 retval = -EINVAL;
3448
3449 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3450 con_driver = &registered_con_driver[i];
3451
3452 if (con_driver->con == NULL) {
3453 con_driver->con = csw;
3454 con_driver->desc = desc;
3455 con_driver->node = i;
3456 con_driver->flag = CON_DRIVER_FLAG_MODULE |
3457 CON_DRIVER_FLAG_INIT;
3458 con_driver->first = first;
3459 con_driver->last = last;
3460 retval = 0;
3461 break;
3462 }
3463 }
3464
3465 if (retval)
3466 goto err;
3467
3468 con_driver->dev = device_create_drvdata(vtconsole_class, NULL,
3469 MKDEV(0, con_driver->node),
3470 NULL, "vtcon%i",
3471 con_driver->node);
3472
3473 if (IS_ERR(con_driver->dev)) {
3474 printk(KERN_WARNING "Unable to create device for %s; "
3475 "errno = %ld\n", con_driver->desc,
3476 PTR_ERR(con_driver->dev));
3477 con_driver->dev = NULL;
3478 } else {
3479 vtconsole_init_device(con_driver);
3480 }
3481
3482 err:
3483 release_console_sem();
3484 module_put(owner);
3485 return retval;
3486 }
3487 EXPORT_SYMBOL(register_con_driver);
3488
3489 /**
3490 * unregister_con_driver - unregister console driver from console layer
3491 * @csw: console driver
3492 *
3493 * DESCRIPTION: All drivers that registers to the console layer must
3494 * call this function upon exit, or if the console driver is in a state
3495 * where it won't be able to handle console services, such as the
3496 * framebuffer console without loaded framebuffer drivers.
3497 *
3498 * The driver must unbind first prior to unregistration.
3499 */
3500 int unregister_con_driver(const struct consw *csw)
3501 {
3502 int i, retval = -ENODEV;
3503
3504 acquire_console_sem();
3505
3506 /* cannot unregister a bound driver */
3507 if (con_is_bound(csw))
3508 goto err;
3509
3510 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3511 struct con_driver *con_driver = &registered_con_driver[i];
3512
3513 if (con_driver->con == csw &&
3514 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3515 vtconsole_deinit_device(con_driver);
3516 device_destroy(vtconsole_class,
3517 MKDEV(0, con_driver->node));
3518 con_driver->con = NULL;
3519 con_driver->desc = NULL;
3520 con_driver->dev = NULL;
3521 con_driver->node = 0;
3522 con_driver->flag = 0;
3523 con_driver->first = 0;
3524 con_driver->last = 0;
3525 retval = 0;
3526 break;
3527 }
3528 }
3529 err:
3530 release_console_sem();
3531 return retval;
3532 }
3533 EXPORT_SYMBOL(unregister_con_driver);
3534
3535 /*
3536 * If we support more console drivers, this function is used
3537 * when a driver wants to take over some existing consoles
3538 * and become default driver for newly opened ones.
3539 *
3540 * take_over_console is basically a register followed by unbind
3541 */
3542 int take_over_console(const struct consw *csw, int first, int last, int deflt)
3543 {
3544 int err;
3545
3546 err = register_con_driver(csw, first, last);
3547
3548 if (!err)
3549 bind_con_driver(csw, first, last, deflt);
3550
3551 return err;
3552 }
3553
3554 /*
3555 * give_up_console is a wrapper to unregister_con_driver. It will only
3556 * work if driver is fully unbound.
3557 */
3558 void give_up_console(const struct consw *csw)
3559 {
3560 unregister_con_driver(csw);
3561 }
3562
3563 static int __init vtconsole_class_init(void)
3564 {
3565 int i;
3566
3567 vtconsole_class = class_create(THIS_MODULE, "vtconsole");
3568 if (IS_ERR(vtconsole_class)) {
3569 printk(KERN_WARNING "Unable to create vt console class; "
3570 "errno = %ld\n", PTR_ERR(vtconsole_class));
3571 vtconsole_class = NULL;
3572 }
3573
3574 /* Add system drivers to sysfs */
3575 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3576 struct con_driver *con = &registered_con_driver[i];
3577
3578 if (con->con && !con->dev) {
3579 con->dev = device_create_drvdata(vtconsole_class, NULL,
3580 MKDEV(0, con->node),
3581 NULL, "vtcon%i",
3582 con->node);
3583
3584 if (IS_ERR(con->dev)) {
3585 printk(KERN_WARNING "Unable to create "
3586 "device for %s; errno = %ld\n",
3587 con->desc, PTR_ERR(con->dev));
3588 con->dev = NULL;
3589 } else {
3590 vtconsole_init_device(con);
3591 }
3592 }
3593 }
3594
3595 return 0;
3596 }
3597 postcore_initcall(vtconsole_class_init);
3598
3599 #endif
3600
3601 /*
3602 * Screen blanking
3603 */
3604
3605 static int set_vesa_blanking(char __user *p)
3606 {
3607 unsigned int mode;
3608
3609 if (get_user(mode, p + 1))
3610 return -EFAULT;
3611
3612 vesa_blank_mode = (mode < 4) ? mode : 0;
3613 return 0;
3614 }
3615
3616 void do_blank_screen(int entering_gfx)
3617 {
3618 struct vc_data *vc = vc_cons[fg_console].d;
3619 int i;
3620
3621 WARN_CONSOLE_UNLOCKED();
3622
3623 if (console_blanked) {
3624 if (blank_state == blank_vesa_wait) {
3625 blank_state = blank_off;
3626 vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0);
3627 }
3628 return;
3629 }
3630
3631 /* entering graphics mode? */
3632 if (entering_gfx) {
3633 hide_cursor(vc);
3634 save_screen(vc);
3635 vc->vc_sw->con_blank(vc, -1, 1);
3636 console_blanked = fg_console + 1;
3637 blank_state = blank_off;
3638 set_origin(vc);
3639 return;
3640 }
3641
3642 if (blank_state != blank_normal_wait)
3643 return;
3644 blank_state = blank_off;
3645
3646 /* don't blank graphics */
3647 if (vc->vc_mode != KD_TEXT) {
3648 console_blanked = fg_console + 1;
3649 return;
3650 }
3651
3652 hide_cursor(vc);
3653 del_timer_sync(&console_timer);
3654 blank_timer_expired = 0;
3655
3656 save_screen(vc);
3657 /* In case we need to reset origin, blanking hook returns 1 */
3658 i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0);
3659 console_blanked = fg_console + 1;
3660 if (i)
3661 set_origin(vc);
3662
3663 if (console_blank_hook && console_blank_hook(1))
3664 return;
3665
3666 if (vesa_off_interval && vesa_blank_mode) {
3667 blank_state = blank_vesa_wait;
3668 mod_timer(&console_timer, jiffies + vesa_off_interval);
3669 }
3670 }
3671 EXPORT_SYMBOL(do_blank_screen);
3672
3673 /*
3674 * Called by timer as well as from vt_console_driver
3675 */
3676 void do_unblank_screen(int leaving_gfx)
3677 {
3678 struct vc_data *vc;
3679
3680 /* This should now always be called from a "sane" (read: can schedule)
3681 * context for the sake of the low level drivers, except in the special
3682 * case of oops_in_progress
3683 */
3684 if (!oops_in_progress)
3685 might_sleep();
3686
3687 WARN_CONSOLE_UNLOCKED();
3688
3689 ignore_poke = 0;
3690 if (!console_blanked)
3691 return;
3692 if (!vc_cons_allocated(fg_console)) {
3693 /* impossible */
3694 printk("unblank_screen: tty %d not allocated ??\n", fg_console+1);
3695 return;
3696 }
3697 vc = vc_cons[fg_console].d;
3698 if (vc->vc_mode != KD_TEXT)
3699 return; /* but leave console_blanked != 0 */
3700
3701 if (blankinterval) {
3702 mod_timer(&console_timer, jiffies + blankinterval);
3703 blank_state = blank_normal_wait;
3704 }
3705
3706 console_blanked = 0;
3707 if (vc->vc_sw->con_blank(vc, 0, leaving_gfx))
3708 /* Low-level driver cannot restore -> do it ourselves */
3709 update_screen(vc);
3710 if (console_blank_hook)
3711 console_blank_hook(0);
3712 set_palette(vc);
3713 set_cursor(vc);
3714 }
3715 EXPORT_SYMBOL(do_unblank_screen);
3716
3717 /*
3718 * This is called by the outside world to cause a forced unblank, mostly for
3719 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
3720 * call it with 1 as an argument and so force a mode restore... that may kill
3721 * X or at least garbage the screen but would also make the Oops visible...
3722 */
3723 void unblank_screen(void)
3724 {
3725 do_unblank_screen(0);
3726 }
3727
3728 /*
3729 * We defer the timer blanking to work queue so it can take the console mutex
3730 * (console operations can still happen at irq time, but only from printk which
3731 * has the console mutex. Not perfect yet, but better than no locking
3732 */
3733 static void blank_screen_t(unsigned long dummy)
3734 {
3735 if (unlikely(!keventd_up())) {
3736 mod_timer(&console_timer, jiffies + blankinterval);
3737 return;
3738 }
3739 blank_timer_expired = 1;
3740 schedule_work(&console_work);
3741 }
3742
3743 void poke_blanked_console(void)
3744 {
3745 WARN_CONSOLE_UNLOCKED();
3746
3747 /* Add this so we quickly catch whoever might call us in a non
3748 * safe context. Nowadays, unblank_screen() isn't to be called in
3749 * atomic contexts and is allowed to schedule (with the special case
3750 * of oops_in_progress, but that isn't of any concern for this
3751 * function. --BenH.
3752 */
3753 might_sleep();
3754
3755 /* This isn't perfectly race free, but a race here would be mostly harmless,
3756 * at worse, we'll do a spurrious blank and it's unlikely
3757 */
3758 del_timer(&console_timer);
3759 blank_timer_expired = 0;
3760
3761 if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS)
3762 return;
3763 if (console_blanked)
3764 unblank_screen();
3765 else if (blankinterval) {
3766 mod_timer(&console_timer, jiffies + blankinterval);
3767 blank_state = blank_normal_wait;
3768 }
3769 }
3770
3771 /*
3772 * Palettes
3773 */
3774
3775 static void set_palette(struct vc_data *vc)
3776 {
3777 WARN_CONSOLE_UNLOCKED();
3778
3779 if (vc->vc_mode != KD_GRAPHICS)
3780 vc->vc_sw->con_set_palette(vc, color_table);
3781 }
3782
3783 static int set_get_cmap(unsigned char __user *arg, int set)
3784 {
3785 int i, j, k;
3786
3787 WARN_CONSOLE_UNLOCKED();
3788
3789 for (i = 0; i < 16; i++)
3790 if (set) {
3791 get_user(default_red[i], arg++);
3792 get_user(default_grn[i], arg++);
3793 get_user(default_blu[i], arg++);
3794 } else {
3795 put_user(default_red[i], arg++);
3796 put_user(default_grn[i], arg++);
3797 put_user(default_blu[i], arg++);
3798 }
3799 if (set) {
3800 for (i = 0; i < MAX_NR_CONSOLES; i++)
3801 if (vc_cons_allocated(i)) {
3802 for (j = k = 0; j < 16; j++) {
3803 vc_cons[i].d->vc_palette[k++] = default_red[j];
3804 vc_cons[i].d->vc_palette[k++] = default_grn[j];
3805 vc_cons[i].d->vc_palette[k++] = default_blu[j];
3806 }
3807 set_palette(vc_cons[i].d);
3808 }
3809 }
3810 return 0;
3811 }
3812
3813 /*
3814 * Load palette into the DAC registers. arg points to a colour
3815 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
3816 */
3817
3818 int con_set_cmap(unsigned char __user *arg)
3819 {
3820 int rc;
3821
3822 acquire_console_sem();
3823 rc = set_get_cmap (arg,1);
3824 release_console_sem();
3825
3826 return rc;
3827 }
3828
3829 int con_get_cmap(unsigned char __user *arg)
3830 {
3831 int rc;
3832
3833 acquire_console_sem();
3834 rc = set_get_cmap (arg,0);
3835 release_console_sem();
3836
3837 return rc;
3838 }
3839
3840 void reset_palette(struct vc_data *vc)
3841 {
3842 int j, k;
3843 for (j=k=0; j<16; j++) {
3844 vc->vc_palette[k++] = default_red[j];
3845 vc->vc_palette[k++] = default_grn[j];
3846 vc->vc_palette[k++] = default_blu[j];
3847 }
3848 set_palette(vc);
3849 }
3850
3851 /*
3852 * Font switching
3853 *
3854 * Currently we only support fonts up to 32 pixels wide, at a maximum height
3855 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
3856 * depending on width) reserved for each character which is kinda wasty, but
3857 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
3858 * is upto the actual low-level console-driver convert data into its favorite
3859 * format (maybe we should add a `fontoffset' field to the `display'
3860 * structure so we won't have to convert the fontdata all the time.
3861 * /Jes
3862 */
3863
3864 #define max_font_size 65536
3865
3866 static int con_font_get(struct vc_data *vc, struct console_font_op *op)
3867 {
3868 struct console_font font;
3869 int rc = -EINVAL;
3870 int c;
3871
3872 if (vc->vc_mode != KD_TEXT)
3873 return -EINVAL;
3874
3875 if (op->data) {
3876 font.data = kmalloc(max_font_size, GFP_KERNEL);
3877 if (!font.data)
3878 return -ENOMEM;
3879 } else
3880 font.data = NULL;
3881
3882 acquire_console_sem();
3883 if (vc->vc_sw->con_font_get)
3884 rc = vc->vc_sw->con_font_get(vc, &font);
3885 else
3886 rc = -ENOSYS;
3887 release_console_sem();
3888
3889 if (rc)
3890 goto out;
3891
3892 c = (font.width+7)/8 * 32 * font.charcount;
3893
3894 if (op->data && font.charcount > op->charcount)
3895 rc = -ENOSPC;
3896 if (!(op->flags & KD_FONT_FLAG_OLD)) {
3897 if (font.width > op->width || font.height > op->height)
3898 rc = -ENOSPC;
3899 } else {
3900 if (font.width != 8)
3901 rc = -EIO;
3902 else if ((op->height && font.height > op->height) ||
3903 font.height > 32)
3904 rc = -ENOSPC;
3905 }
3906 if (rc)
3907 goto out;
3908
3909 op->height = font.height;
3910 op->width = font.width;
3911 op->charcount = font.charcount;
3912
3913 if (op->data && copy_to_user(op->data, font.data, c))
3914 rc = -EFAULT;
3915
3916 out:
3917 kfree(font.data);
3918 return rc;
3919 }
3920
3921 static int con_font_set(struct vc_data *vc, struct console_font_op *op)
3922 {
3923 struct console_font font;
3924 int rc = -EINVAL;
3925 int size;
3926
3927 if (vc->vc_mode != KD_TEXT)
3928 return -EINVAL;
3929 if (!op->data)
3930 return -EINVAL;
3931 if (op->charcount > 512)
3932 return -EINVAL;
3933 if (!op->height) { /* Need to guess font height [compat] */
3934 int h, i;
3935 u8 __user *charmap = op->data;
3936 u8 tmp;
3937
3938 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
3939 so that we can get rid of this soon */
3940 if (!(op->flags & KD_FONT_FLAG_OLD))
3941 return -EINVAL;
3942 for (h = 32; h > 0; h--)
3943 for (i = 0; i < op->charcount; i++) {
3944 if (get_user(tmp, &charmap[32*i+h-1]))
3945 return -EFAULT;
3946 if (tmp)
3947 goto nonzero;
3948 }
3949 return -EINVAL;
3950 nonzero:
3951 op->height = h;
3952 }
3953 if (op->width <= 0 || op->width > 32 || op->height > 32)
3954 return -EINVAL;
3955 size = (op->width+7)/8 * 32 * op->charcount;
3956 if (size > max_font_size)
3957 return -ENOSPC;
3958 font.charcount = op->charcount;
3959 font.height = op->height;
3960 font.width = op->width;
3961 font.data = kmalloc(size, GFP_KERNEL);
3962 if (!font.data)
3963 return -ENOMEM;
3964 if (copy_from_user(font.data, op->data, size)) {
3965 kfree(font.data);
3966 return -EFAULT;
3967 }
3968 acquire_console_sem();
3969 if (vc->vc_sw->con_font_set)
3970 rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
3971 else
3972 rc = -ENOSYS;
3973 release_console_sem();
3974 kfree(font.data);
3975 return rc;
3976 }
3977
3978 static int con_font_default(struct vc_data *vc, struct console_font_op *op)
3979 {
3980 struct console_font font = {.width = op->width, .height = op->height};
3981 char name[MAX_FONT_NAME];
3982 char *s = name;
3983 int rc;
3984
3985 if (vc->vc_mode != KD_TEXT)
3986 return -EINVAL;
3987
3988 if (!op->data)
3989 s = NULL;
3990 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0)
3991 return -EFAULT;
3992 else
3993 name[MAX_FONT_NAME - 1] = 0;
3994
3995 acquire_console_sem();
3996 if (vc->vc_sw->con_font_default)
3997 rc = vc->vc_sw->con_font_default(vc, &font, s);
3998 else
3999 rc = -ENOSYS;
4000 release_console_sem();
4001 if (!rc) {
4002 op->width = font.width;
4003 op->height = font.height;
4004 }
4005 return rc;
4006 }
4007
4008 static int con_font_copy(struct vc_data *vc, struct console_font_op *op)
4009 {
4010 int con = op->height;
4011 int rc;
4012
4013 if (vc->vc_mode != KD_TEXT)
4014 return -EINVAL;
4015
4016 acquire_console_sem();
4017 if (!vc->vc_sw->con_font_copy)
4018 rc = -ENOSYS;
4019 else if (con < 0 || !vc_cons_allocated(con))
4020 rc = -ENOTTY;
4021 else if (con == vc->vc_num) /* nothing to do */
4022 rc = 0;
4023 else
4024 rc = vc->vc_sw->con_font_copy(vc, con);
4025 release_console_sem();
4026 return rc;
4027 }
4028
4029 int con_font_op(struct vc_data *vc, struct console_font_op *op)
4030 {
4031 switch (op->op) {
4032 case KD_FONT_OP_SET:
4033 return con_font_set(vc, op);
4034 case KD_FONT_OP_GET:
4035 return con_font_get(vc, op);
4036 case KD_FONT_OP_SET_DEFAULT:
4037 return con_font_default(vc, op);
4038 case KD_FONT_OP_COPY:
4039 return con_font_copy(vc, op);
4040 }
4041 return -ENOSYS;
4042 }
4043
4044 /*
4045 * Interface exported to selection and vcs.
4046 */
4047
4048 /* used by selection */
4049 u16 screen_glyph(struct vc_data *vc, int offset)
4050 {
4051 u16 w = scr_readw(screenpos(vc, offset, 1));
4052 u16 c = w & 0xff;
4053
4054 if (w & vc->vc_hi_font_mask)
4055 c |= 0x100;
4056 return c;
4057 }
4058 EXPORT_SYMBOL_GPL(screen_glyph);
4059
4060 /* used by vcs - note the word offset */
4061 unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed)
4062 {
4063 return screenpos(vc, 2 * w_offset, viewed);
4064 }
4065
4066 void getconsxy(struct vc_data *vc, unsigned char *p)
4067 {
4068 p[0] = vc->vc_x;
4069 p[1] = vc->vc_y;
4070 }
4071
4072 void putconsxy(struct vc_data *vc, unsigned char *p)
4073 {
4074 hide_cursor(vc);
4075 gotoxy(vc, p[0], p[1]);
4076 set_cursor(vc);
4077 }
4078
4079 u16 vcs_scr_readw(struct vc_data *vc, const u16 *org)
4080 {
4081 if ((unsigned long)org == vc->vc_pos && softcursor_original != -1)
4082 return softcursor_original;
4083 return scr_readw(org);
4084 }
4085
4086 void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org)
4087 {
4088 scr_writew(val, org);
4089 if ((unsigned long)org == vc->vc_pos) {
4090 softcursor_original = -1;
4091 add_softcursor(vc);
4092 }
4093 }
4094
4095 /*
4096 * Visible symbols for modules
4097 */
4098
4099 EXPORT_SYMBOL(color_table);
4100 EXPORT_SYMBOL(default_red);
4101 EXPORT_SYMBOL(default_grn);
4102 EXPORT_SYMBOL(default_blu);
4103 EXPORT_SYMBOL(update_region);
4104 EXPORT_SYMBOL(redraw_screen);
4105 EXPORT_SYMBOL(vc_resize);
4106 EXPORT_SYMBOL(fg_console);
4107 EXPORT_SYMBOL(console_blank_hook);
4108 EXPORT_SYMBOL(console_blanked);
4109 EXPORT_SYMBOL(vc_cons);
4110 #ifndef VT_SINGLE_DRIVER
4111 EXPORT_SYMBOL(take_over_console);
4112 EXPORT_SYMBOL(give_up_console);
4113 #endif
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree