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[deliverable/linux.git] / drivers / tty / vt / vt.c
1 /*
2 * Copyright (C) 1991, 1992 Linus Torvalds
3 */
4
5 /*
6 * Hopefully this will be a rather complete VT102 implementation.
7 *
8 * Beeping thanks to John T Kohl.
9 *
10 * Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics
11 * Chars, and VT100 enhancements by Peter MacDonald.
12 *
13 * Copy and paste function by Andrew Haylett,
14 * some enhancements by Alessandro Rubini.
15 *
16 * Code to check for different video-cards mostly by Galen Hunt,
17 * <g-hunt@ee.utah.edu>
18 *
19 * Rudimentary ISO 10646/Unicode/UTF-8 character set support by
20 * Markus Kuhn, <mskuhn@immd4.informatik.uni-erlangen.de>.
21 *
22 * Dynamic allocation of consoles, aeb@cwi.nl, May 1994
23 * Resizing of consoles, aeb, 940926
24 *
25 * Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94
26 * <poe@daimi.aau.dk>
27 *
28 * User-defined bell sound, new setterm control sequences and printk
29 * redirection by Martin Mares <mj@k332.feld.cvut.cz> 19-Nov-95
30 *
31 * APM screenblank bug fixed Takashi Manabe <manabe@roy.dsl.tutics.tut.jp>
32 *
33 * Merge with the abstract console driver by Geert Uytterhoeven
34 * <geert@linux-m68k.org>, Jan 1997.
35 *
36 * Original m68k console driver modifications by
37 *
38 * - Arno Griffioen <arno@usn.nl>
39 * - David Carter <carter@cs.bris.ac.uk>
40 *
41 * The abstract console driver provides a generic interface for a text
42 * console. It supports VGA text mode, frame buffer based graphical consoles
43 * and special graphics processors that are only accessible through some
44 * registers (e.g. a TMS340x0 GSP).
45 *
46 * The interface to the hardware is specified using a special structure
47 * (struct consw) which contains function pointers to console operations
48 * (see <linux/console.h> for more information).
49 *
50 * Support for changeable cursor shape
51 * by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997
52 *
53 * Ported to i386 and con_scrolldelta fixed
54 * by Emmanuel Marty <core@ggi-project.org>, April 1998
55 *
56 * Resurrected character buffers in videoram plus lots of other trickery
57 * by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998
58 *
59 * Removed old-style timers, introduced console_timer, made timer
60 * deletion SMP-safe. 17Jun00, Andrew Morton
61 *
62 * Removed console_lock, enabled interrupts across all console operations
63 * 13 March 2001, Andrew Morton
64 *
65 * Fixed UTF-8 mode so alternate charset modes always work according
66 * to control sequences interpreted in do_con_trol function
67 * preserving backward VT100 semigraphics compatibility,
68 * malformed UTF sequences represented as sequences of replacement glyphs,
69 * original codes or '?' as a last resort if replacement glyph is undefined
70 * by Adam Tla/lka <atlka@pg.gda.pl>, Aug 2006
71 */
72
73 #include <linux/module.h>
74 #include <linux/types.h>
75 #include <linux/sched.h>
76 #include <linux/tty.h>
77 #include <linux/tty_flip.h>
78 #include <linux/kernel.h>
79 #include <linux/string.h>
80 #include <linux/errno.h>
81 #include <linux/kd.h>
82 #include <linux/slab.h>
83 #include <linux/major.h>
84 #include <linux/mm.h>
85 #include <linux/console.h>
86 #include <linux/init.h>
87 #include <linux/mutex.h>
88 #include <linux/vt_kern.h>
89 #include <linux/selection.h>
90 #include <linux/tiocl.h>
91 #include <linux/kbd_kern.h>
92 #include <linux/consolemap.h>
93 #include <linux/timer.h>
94 #include <linux/interrupt.h>
95 #include <linux/workqueue.h>
96 #include <linux/pm.h>
97 #include <linux/font.h>
98 #include <linux/bitops.h>
99 #include <linux/notifier.h>
100 #include <linux/device.h>
101 #include <linux/io.h>
102 #include <linux/uaccess.h>
103 #include <linux/kdb.h>
104 #include <linux/ctype.h>
105
106 #define MAX_NR_CON_DRIVER 16
107
108 #define CON_DRIVER_FLAG_MODULE 1
109 #define CON_DRIVER_FLAG_INIT 2
110 #define CON_DRIVER_FLAG_ATTR 4
111 #define CON_DRIVER_FLAG_ZOMBIE 8
112
113 struct con_driver {
114 const struct consw *con;
115 const char *desc;
116 struct device *dev;
117 int node;
118 int first;
119 int last;
120 int flag;
121 };
122
123 static struct con_driver registered_con_driver[MAX_NR_CON_DRIVER];
124 const struct consw *conswitchp;
125
126 /* A bitmap for codes <32. A bit of 1 indicates that the code
127 * corresponding to that bit number invokes some special action
128 * (such as cursor movement) and should not be displayed as a
129 * glyph unless the disp_ctrl mode is explicitly enabled.
130 */
131 #define CTRL_ACTION 0x0d00ff81
132 #define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */
133
134 /*
135 * Here is the default bell parameters: 750HZ, 1/8th of a second
136 */
137 #define DEFAULT_BELL_PITCH 750
138 #define DEFAULT_BELL_DURATION (HZ/8)
139 #define DEFAULT_CURSOR_BLINK_MS 200
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 con_driver_unregister_callback(struct work_struct *ignored);
159 static void blank_screen_t(unsigned long dummy);
160 static void set_palette(struct vc_data *vc);
161
162 #define vt_get_kmsg_redirect() vt_kmsg_redirect(-1)
163
164 static int printable; /* Is console ready for printing? */
165 int default_utf8 = true;
166 module_param(default_utf8, int, S_IRUGO | S_IWUSR);
167 int global_cursor_default = -1;
168 module_param(global_cursor_default, int, S_IRUGO | S_IWUSR);
169
170 static int cur_default = CUR_DEFAULT;
171 module_param(cur_default, int, S_IRUGO | S_IWUSR);
172
173 /*
174 * ignore_poke: don't unblank the screen when things are typed. This is
175 * mainly for the privacy of braille terminal users.
176 */
177 static int ignore_poke;
178
179 int do_poke_blanked_console;
180 int console_blanked;
181
182 static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
183 static int vesa_off_interval;
184 static int blankinterval = 10*60;
185 core_param(consoleblank, blankinterval, int, 0444);
186
187 static DECLARE_WORK(console_work, console_callback);
188 static DECLARE_WORK(con_driver_unregister_work, con_driver_unregister_callback);
189
190 /*
191 * fg_console is the current virtual console,
192 * last_console is the last used one,
193 * want_console is the console we want to switch to,
194 * saved_* variants are for save/restore around kernel debugger enter/leave
195 */
196 int fg_console;
197 int last_console;
198 int want_console = -1;
199 static int saved_fg_console;
200 static int saved_last_console;
201 static int saved_want_console;
202 static int saved_vc_mode;
203 static int saved_console_blanked;
204
205 /*
206 * For each existing display, we have a pointer to console currently visible
207 * on that display, allowing consoles other than fg_console to be refreshed
208 * appropriately. Unless the low-level driver supplies its own display_fg
209 * variable, we use this one for the "master display".
210 */
211 static struct vc_data *master_display_fg;
212
213 /*
214 * Unfortunately, we need to delay tty echo when we're currently writing to the
215 * console since the code is (and always was) not re-entrant, so we schedule
216 * all flip requests to process context with schedule-task() and run it from
217 * console_callback().
218 */
219
220 /*
221 * For the same reason, we defer scrollback to the console callback.
222 */
223 static int scrollback_delta;
224
225 /*
226 * Hook so that the power management routines can (un)blank
227 * the console on our behalf.
228 */
229 int (*console_blank_hook)(int);
230
231 static DEFINE_TIMER(console_timer, blank_screen_t, 0, 0);
232 static int blank_state;
233 static int blank_timer_expired;
234 enum {
235 blank_off = 0,
236 blank_normal_wait,
237 blank_vesa_wait,
238 };
239
240 /*
241 * /sys/class/tty/tty0/
242 *
243 * the attribute 'active' contains the name of the current vc
244 * console and it supports poll() to detect vc switches
245 */
246 static struct device *tty0dev;
247
248 /*
249 * Notifier list for console events.
250 */
251 static ATOMIC_NOTIFIER_HEAD(vt_notifier_list);
252
253 int register_vt_notifier(struct notifier_block *nb)
254 {
255 return atomic_notifier_chain_register(&vt_notifier_list, nb);
256 }
257 EXPORT_SYMBOL_GPL(register_vt_notifier);
258
259 int unregister_vt_notifier(struct notifier_block *nb)
260 {
261 return atomic_notifier_chain_unregister(&vt_notifier_list, nb);
262 }
263 EXPORT_SYMBOL_GPL(unregister_vt_notifier);
264
265 static void notify_write(struct vc_data *vc, unsigned int unicode)
266 {
267 struct vt_notifier_param param = { .vc = vc, .c = unicode };
268 atomic_notifier_call_chain(&vt_notifier_list, VT_WRITE, &param);
269 }
270
271 static void notify_update(struct vc_data *vc)
272 {
273 struct vt_notifier_param param = { .vc = vc };
274 atomic_notifier_call_chain(&vt_notifier_list, VT_UPDATE, &param);
275 }
276 /*
277 * Low-Level Functions
278 */
279
280 #define IS_FG(vc) ((vc)->vc_num == fg_console)
281
282 #ifdef VT_BUF_VRAM_ONLY
283 #define DO_UPDATE(vc) 0
284 #else
285 #define DO_UPDATE(vc) (CON_IS_VISIBLE(vc) && !console_blanked)
286 #endif
287
288 static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed)
289 {
290 unsigned short *p;
291
292 if (!viewed)
293 p = (unsigned short *)(vc->vc_origin + offset);
294 else if (!vc->vc_sw->con_screen_pos)
295 p = (unsigned short *)(vc->vc_visible_origin + offset);
296 else
297 p = vc->vc_sw->con_screen_pos(vc, offset);
298 return p;
299 }
300
301 /* Called from the keyboard irq path.. */
302 static inline void scrolldelta(int lines)
303 {
304 /* FIXME */
305 /* scrolldelta needs some kind of consistency lock, but the BKL was
306 and still is not protecting versus the scheduled back end */
307 scrollback_delta += lines;
308 schedule_console_callback();
309 }
310
311 void schedule_console_callback(void)
312 {
313 schedule_work(&console_work);
314 }
315
316 static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
317 {
318 unsigned short *d, *s;
319
320 if (t+nr >= b)
321 nr = b - t - 1;
322 if (b > vc->vc_rows || t >= b || nr < 1)
323 return;
324 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr))
325 return;
326 d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
327 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr));
328 scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row);
329 scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_video_erase_char,
330 vc->vc_size_row * nr);
331 }
332
333 static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
334 {
335 unsigned short *s;
336 unsigned int step;
337
338 if (t+nr >= b)
339 nr = b - t - 1;
340 if (b > vc->vc_rows || t >= b || nr < 1)
341 return;
342 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr))
343 return;
344 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
345 step = vc->vc_cols * nr;
346 scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row);
347 scr_memsetw(s, vc->vc_video_erase_char, 2 * step);
348 }
349
350 static void do_update_region(struct vc_data *vc, unsigned long start, int count)
351 {
352 #ifndef VT_BUF_VRAM_ONLY
353 unsigned int xx, yy, offset;
354 u16 *p;
355
356 p = (u16 *) start;
357 if (!vc->vc_sw->con_getxy) {
358 offset = (start - vc->vc_origin) / 2;
359 xx = offset % vc->vc_cols;
360 yy = offset / vc->vc_cols;
361 } else {
362 int nxx, nyy;
363 start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy);
364 xx = nxx; yy = nyy;
365 }
366 for(;;) {
367 u16 attrib = scr_readw(p) & 0xff00;
368 int startx = xx;
369 u16 *q = p;
370 while (xx < vc->vc_cols && count) {
371 if (attrib != (scr_readw(p) & 0xff00)) {
372 if (p > q)
373 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
374 startx = xx;
375 q = p;
376 attrib = scr_readw(p) & 0xff00;
377 }
378 p++;
379 xx++;
380 count--;
381 }
382 if (p > q)
383 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
384 if (!count)
385 break;
386 xx = 0;
387 yy++;
388 if (vc->vc_sw->con_getxy) {
389 p = (u16 *)start;
390 start = vc->vc_sw->con_getxy(vc, start, NULL, NULL);
391 }
392 }
393 #endif
394 }
395
396 void update_region(struct vc_data *vc, unsigned long start, int count)
397 {
398 WARN_CONSOLE_UNLOCKED();
399
400 if (DO_UPDATE(vc)) {
401 hide_cursor(vc);
402 do_update_region(vc, start, count);
403 set_cursor(vc);
404 }
405 }
406
407 /* Structure of attributes is hardware-dependent */
408
409 static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink,
410 u8 _underline, u8 _reverse, u8 _italic)
411 {
412 if (vc->vc_sw->con_build_attr)
413 return vc->vc_sw->con_build_attr(vc, _color, _intensity,
414 _blink, _underline, _reverse, _italic);
415
416 #ifndef VT_BUF_VRAM_ONLY
417 /*
418 * ++roman: I completely changed the attribute format for monochrome
419 * mode (!can_do_color). The formerly used MDA (monochrome display
420 * adapter) format didn't allow the combination of certain effects.
421 * Now the attribute is just a bit vector:
422 * Bit 0..1: intensity (0..2)
423 * Bit 2 : underline
424 * Bit 3 : reverse
425 * Bit 7 : blink
426 */
427 {
428 u8 a = _color;
429 if (!vc->vc_can_do_color)
430 return _intensity |
431 (_italic ? 2 : 0) |
432 (_underline ? 4 : 0) |
433 (_reverse ? 8 : 0) |
434 (_blink ? 0x80 : 0);
435 if (_italic)
436 a = (a & 0xF0) | vc->vc_itcolor;
437 else if (_underline)
438 a = (a & 0xf0) | vc->vc_ulcolor;
439 else if (_intensity == 0)
440 a = (a & 0xf0) | vc->vc_ulcolor;
441 if (_reverse)
442 a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77);
443 if (_blink)
444 a ^= 0x80;
445 if (_intensity == 2)
446 a ^= 0x08;
447 if (vc->vc_hi_font_mask == 0x100)
448 a <<= 1;
449 return a;
450 }
451 #else
452 return 0;
453 #endif
454 }
455
456 static void update_attr(struct vc_data *vc)
457 {
458 vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity,
459 vc->vc_blink, vc->vc_underline,
460 vc->vc_reverse ^ vc->vc_decscnm, vc->vc_italic);
461 vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm, 0) << 8) | ' ';
462 }
463
464 /* Note: inverting the screen twice should revert to the original state */
465 void invert_screen(struct vc_data *vc, int offset, int count, int viewed)
466 {
467 unsigned short *p;
468
469 WARN_CONSOLE_UNLOCKED();
470
471 count /= 2;
472 p = screenpos(vc, offset, viewed);
473 if (vc->vc_sw->con_invert_region)
474 vc->vc_sw->con_invert_region(vc, p, count);
475 #ifndef VT_BUF_VRAM_ONLY
476 else {
477 u16 *q = p;
478 int cnt = count;
479 u16 a;
480
481 if (!vc->vc_can_do_color) {
482 while (cnt--) {
483 a = scr_readw(q);
484 a ^= 0x0800;
485 scr_writew(a, q);
486 q++;
487 }
488 } else if (vc->vc_hi_font_mask == 0x100) {
489 while (cnt--) {
490 a = scr_readw(q);
491 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4);
492 scr_writew(a, q);
493 q++;
494 }
495 } else {
496 while (cnt--) {
497 a = scr_readw(q);
498 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4);
499 scr_writew(a, q);
500 q++;
501 }
502 }
503 }
504 #endif
505 if (DO_UPDATE(vc))
506 do_update_region(vc, (unsigned long) p, count);
507 notify_update(vc);
508 }
509
510 /* used by selection: complement pointer position */
511 void complement_pos(struct vc_data *vc, int offset)
512 {
513 static int old_offset = -1;
514 static unsigned short old;
515 static unsigned short oldx, oldy;
516
517 WARN_CONSOLE_UNLOCKED();
518
519 if (old_offset != -1 && old_offset >= 0 &&
520 old_offset < vc->vc_screenbuf_size) {
521 scr_writew(old, screenpos(vc, old_offset, 1));
522 if (DO_UPDATE(vc))
523 vc->vc_sw->con_putc(vc, old, oldy, oldx);
524 notify_update(vc);
525 }
526
527 old_offset = offset;
528
529 if (offset != -1 && offset >= 0 &&
530 offset < vc->vc_screenbuf_size) {
531 unsigned short new;
532 unsigned short *p;
533 p = screenpos(vc, offset, 1);
534 old = scr_readw(p);
535 new = old ^ vc->vc_complement_mask;
536 scr_writew(new, p);
537 if (DO_UPDATE(vc)) {
538 oldx = (offset >> 1) % vc->vc_cols;
539 oldy = (offset >> 1) / vc->vc_cols;
540 vc->vc_sw->con_putc(vc, new, oldy, oldx);
541 }
542 notify_update(vc);
543 }
544 }
545
546 static void insert_char(struct vc_data *vc, unsigned int nr)
547 {
548 unsigned short *p = (unsigned short *) vc->vc_pos;
549
550 scr_memmovew(p + nr, p, (vc->vc_cols - vc->vc_x - nr) * 2);
551 scr_memsetw(p, vc->vc_video_erase_char, nr * 2);
552 vc->vc_need_wrap = 0;
553 if (DO_UPDATE(vc))
554 do_update_region(vc, (unsigned long) p,
555 vc->vc_cols - vc->vc_x);
556 }
557
558 static void delete_char(struct vc_data *vc, unsigned int nr)
559 {
560 unsigned short *p = (unsigned short *) vc->vc_pos;
561
562 scr_memcpyw(p, p + nr, (vc->vc_cols - vc->vc_x - nr) * 2);
563 scr_memsetw(p + vc->vc_cols - vc->vc_x - nr, vc->vc_video_erase_char,
564 nr * 2);
565 vc->vc_need_wrap = 0;
566 if (DO_UPDATE(vc))
567 do_update_region(vc, (unsigned long) p,
568 vc->vc_cols - vc->vc_x);
569 }
570
571 static int softcursor_original = -1;
572
573 static void add_softcursor(struct vc_data *vc)
574 {
575 int i = scr_readw((u16 *) vc->vc_pos);
576 u32 type = vc->vc_cursor_type;
577
578 if (! (type & 0x10)) return;
579 if (softcursor_original != -1) return;
580 softcursor_original = i;
581 i |= ((type >> 8) & 0xff00 );
582 i ^= ((type) & 0xff00 );
583 if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000;
584 if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700;
585 scr_writew(i, (u16 *) vc->vc_pos);
586 if (DO_UPDATE(vc))
587 vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x);
588 }
589
590 static void hide_softcursor(struct vc_data *vc)
591 {
592 if (softcursor_original != -1) {
593 scr_writew(softcursor_original, (u16 *)vc->vc_pos);
594 if (DO_UPDATE(vc))
595 vc->vc_sw->con_putc(vc, softcursor_original,
596 vc->vc_y, vc->vc_x);
597 softcursor_original = -1;
598 }
599 }
600
601 static void hide_cursor(struct vc_data *vc)
602 {
603 if (vc == sel_cons)
604 clear_selection();
605 vc->vc_sw->con_cursor(vc, CM_ERASE);
606 hide_softcursor(vc);
607 }
608
609 static void set_cursor(struct vc_data *vc)
610 {
611 if (!IS_FG(vc) || console_blanked ||
612 vc->vc_mode == KD_GRAPHICS)
613 return;
614 if (vc->vc_deccm) {
615 if (vc == sel_cons)
616 clear_selection();
617 add_softcursor(vc);
618 if ((vc->vc_cursor_type & 0x0f) != 1)
619 vc->vc_sw->con_cursor(vc, CM_DRAW);
620 } else
621 hide_cursor(vc);
622 }
623
624 static void set_origin(struct vc_data *vc)
625 {
626 WARN_CONSOLE_UNLOCKED();
627
628 if (!CON_IS_VISIBLE(vc) ||
629 !vc->vc_sw->con_set_origin ||
630 !vc->vc_sw->con_set_origin(vc))
631 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
632 vc->vc_visible_origin = vc->vc_origin;
633 vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size;
634 vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x;
635 }
636
637 static void save_screen(struct vc_data *vc)
638 {
639 WARN_CONSOLE_UNLOCKED();
640
641 if (vc->vc_sw->con_save_screen)
642 vc->vc_sw->con_save_screen(vc);
643 }
644
645 /*
646 * Redrawing of screen
647 */
648
649 void clear_buffer_attributes(struct vc_data *vc)
650 {
651 unsigned short *p = (unsigned short *)vc->vc_origin;
652 int count = vc->vc_screenbuf_size / 2;
653 int mask = vc->vc_hi_font_mask | 0xff;
654
655 for (; count > 0; count--, p++) {
656 scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p);
657 }
658 }
659
660 void redraw_screen(struct vc_data *vc, int is_switch)
661 {
662 int redraw = 0;
663
664 WARN_CONSOLE_UNLOCKED();
665
666 if (!vc) {
667 /* strange ... */
668 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
669 return;
670 }
671
672 if (is_switch) {
673 struct vc_data *old_vc = vc_cons[fg_console].d;
674 if (old_vc == vc)
675 return;
676 if (!CON_IS_VISIBLE(vc))
677 redraw = 1;
678 *vc->vc_display_fg = vc;
679 fg_console = vc->vc_num;
680 hide_cursor(old_vc);
681 if (!CON_IS_VISIBLE(old_vc)) {
682 save_screen(old_vc);
683 set_origin(old_vc);
684 }
685 if (tty0dev)
686 sysfs_notify(&tty0dev->kobj, NULL, "active");
687 } else {
688 hide_cursor(vc);
689 redraw = 1;
690 }
691
692 if (redraw) {
693 int update;
694 int old_was_color = vc->vc_can_do_color;
695
696 set_origin(vc);
697 update = vc->vc_sw->con_switch(vc);
698 set_palette(vc);
699 /*
700 * If console changed from mono<->color, the best we can do
701 * is to clear the buffer attributes. As it currently stands,
702 * rebuilding new attributes from the old buffer is not doable
703 * without overly complex code.
704 */
705 if (old_was_color != vc->vc_can_do_color) {
706 update_attr(vc);
707 clear_buffer_attributes(vc);
708 }
709
710 /* Forcibly update if we're panicing */
711 if ((update && vc->vc_mode != KD_GRAPHICS) ||
712 vt_force_oops_output(vc))
713 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
714 }
715 set_cursor(vc);
716 if (is_switch) {
717 set_leds();
718 compute_shiftstate();
719 notify_update(vc);
720 }
721 }
722
723 /*
724 * Allocation, freeing and resizing of VTs.
725 */
726
727 int vc_cons_allocated(unsigned int i)
728 {
729 return (i < MAX_NR_CONSOLES && vc_cons[i].d);
730 }
731
732 static void visual_init(struct vc_data *vc, int num, int init)
733 {
734 /* ++Geert: vc->vc_sw->con_init determines console size */
735 if (vc->vc_sw)
736 module_put(vc->vc_sw->owner);
737 vc->vc_sw = conswitchp;
738 #ifndef VT_SINGLE_DRIVER
739 if (con_driver_map[num])
740 vc->vc_sw = con_driver_map[num];
741 #endif
742 __module_get(vc->vc_sw->owner);
743 vc->vc_num = num;
744 vc->vc_display_fg = &master_display_fg;
745 if (vc->vc_uni_pagedir_loc)
746 con_free_unimap(vc);
747 vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir;
748 vc->vc_uni_pagedir = NULL;
749 vc->vc_hi_font_mask = 0;
750 vc->vc_complement_mask = 0;
751 vc->vc_can_do_color = 0;
752 vc->vc_panic_force_write = false;
753 vc->vc_sw->con_init(vc, init);
754 if (!vc->vc_complement_mask)
755 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
756 vc->vc_s_complement_mask = vc->vc_complement_mask;
757 vc->vc_size_row = vc->vc_cols << 1;
758 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
759 }
760
761 int vc_allocate(unsigned int currcons) /* return 0 on success */
762 {
763 WARN_CONSOLE_UNLOCKED();
764
765 if (currcons >= MAX_NR_CONSOLES)
766 return -ENXIO;
767 if (!vc_cons[currcons].d) {
768 struct vc_data *vc;
769 struct vt_notifier_param param;
770
771 /* prevent users from taking too much memory */
772 if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE))
773 return -EPERM;
774
775 /* due to the granularity of kmalloc, we waste some memory here */
776 /* the alloc is done in two steps, to optimize the common situation
777 of a 25x80 console (structsize=216, screenbuf_size=4000) */
778 /* although the numbers above are not valid since long ago, the
779 point is still up-to-date and the comment still has its value
780 even if only as a historical artifact. --mj, July 1998 */
781 param.vc = vc = kzalloc(sizeof(struct vc_data), GFP_KERNEL);
782 if (!vc)
783 return -ENOMEM;
784 vc_cons[currcons].d = vc;
785 tty_port_init(&vc->port);
786 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
787 visual_init(vc, currcons, 1);
788 if (!*vc->vc_uni_pagedir_loc)
789 con_set_default_unimap(vc);
790 vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL);
791 if (!vc->vc_screenbuf) {
792 kfree(vc);
793 vc_cons[currcons].d = NULL;
794 return -ENOMEM;
795 }
796
797 /* If no drivers have overridden us and the user didn't pass a
798 boot option, default to displaying the cursor */
799 if (global_cursor_default == -1)
800 global_cursor_default = 1;
801
802 vc_init(vc, vc->vc_rows, vc->vc_cols, 1);
803 vcs_make_sysfs(currcons);
804 atomic_notifier_call_chain(&vt_notifier_list, VT_ALLOCATE, &param);
805 }
806 return 0;
807 }
808
809 static inline int resize_screen(struct vc_data *vc, int width, int height,
810 int user)
811 {
812 /* Resizes the resolution of the display adapater */
813 int err = 0;
814
815 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize)
816 err = vc->vc_sw->con_resize(vc, width, height, user);
817
818 return err;
819 }
820
821 /*
822 * Change # of rows and columns (0 means unchanged/the size of fg_console)
823 * [this is to be used together with some user program
824 * like resize that changes the hardware videomode]
825 */
826 #define VC_RESIZE_MAXCOL (32767)
827 #define VC_RESIZE_MAXROW (32767)
828
829 /**
830 * vc_do_resize - resizing method for the tty
831 * @tty: tty being resized
832 * @real_tty: real tty (different to tty if a pty/tty pair)
833 * @vc: virtual console private data
834 * @cols: columns
835 * @lines: lines
836 *
837 * Resize a virtual console, clipping according to the actual constraints.
838 * If the caller passes a tty structure then update the termios winsize
839 * information and perform any necessary signal handling.
840 *
841 * Caller must hold the console semaphore. Takes the termios rwsem and
842 * ctrl_lock of the tty IFF a tty is passed.
843 */
844
845 static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc,
846 unsigned int cols, unsigned int lines)
847 {
848 unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0;
849 unsigned long end;
850 unsigned int old_rows, old_row_size;
851 unsigned int new_cols, new_rows, new_row_size, new_screen_size;
852 unsigned int user;
853 unsigned short *newscreen;
854
855 WARN_CONSOLE_UNLOCKED();
856
857 if (!vc)
858 return -ENXIO;
859
860 user = vc->vc_resize_user;
861 vc->vc_resize_user = 0;
862
863 if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW)
864 return -EINVAL;
865
866 new_cols = (cols ? cols : vc->vc_cols);
867 new_rows = (lines ? lines : vc->vc_rows);
868 new_row_size = new_cols << 1;
869 new_screen_size = new_row_size * new_rows;
870
871 if (new_cols == vc->vc_cols && new_rows == vc->vc_rows)
872 return 0;
873
874 newscreen = kmalloc(new_screen_size, GFP_USER);
875 if (!newscreen)
876 return -ENOMEM;
877
878 old_rows = vc->vc_rows;
879 old_row_size = vc->vc_size_row;
880
881 err = resize_screen(vc, new_cols, new_rows, user);
882 if (err) {
883 kfree(newscreen);
884 return err;
885 }
886
887 vc->vc_rows = new_rows;
888 vc->vc_cols = new_cols;
889 vc->vc_size_row = new_row_size;
890 vc->vc_screenbuf_size = new_screen_size;
891
892 rlth = min(old_row_size, new_row_size);
893 rrem = new_row_size - rlth;
894 old_origin = vc->vc_origin;
895 new_origin = (long) newscreen;
896 new_scr_end = new_origin + new_screen_size;
897
898 if (vc->vc_y > new_rows) {
899 if (old_rows - vc->vc_y < new_rows) {
900 /*
901 * Cursor near the bottom, copy contents from the
902 * bottom of buffer
903 */
904 old_origin += (old_rows - new_rows) * old_row_size;
905 } else {
906 /*
907 * Cursor is in no man's land, copy 1/2 screenful
908 * from the top and bottom of cursor position
909 */
910 old_origin += (vc->vc_y - new_rows/2) * old_row_size;
911 }
912 }
913
914 end = old_origin + old_row_size * min(old_rows, new_rows);
915
916 update_attr(vc);
917
918 while (old_origin < end) {
919 scr_memcpyw((unsigned short *) new_origin,
920 (unsigned short *) old_origin, rlth);
921 if (rrem)
922 scr_memsetw((void *)(new_origin + rlth),
923 vc->vc_video_erase_char, rrem);
924 old_origin += old_row_size;
925 new_origin += new_row_size;
926 }
927 if (new_scr_end > new_origin)
928 scr_memsetw((void *)new_origin, vc->vc_video_erase_char,
929 new_scr_end - new_origin);
930 kfree(vc->vc_screenbuf);
931 vc->vc_screenbuf = newscreen;
932 vc->vc_screenbuf_size = new_screen_size;
933 set_origin(vc);
934
935 /* do part of a reset_terminal() */
936 vc->vc_top = 0;
937 vc->vc_bottom = vc->vc_rows;
938 gotoxy(vc, vc->vc_x, vc->vc_y);
939 save_cur(vc);
940
941 if (tty) {
942 /* Rewrite the requested winsize data with the actual
943 resulting sizes */
944 struct winsize ws;
945 memset(&ws, 0, sizeof(ws));
946 ws.ws_row = vc->vc_rows;
947 ws.ws_col = vc->vc_cols;
948 ws.ws_ypixel = vc->vc_scan_lines;
949 tty_do_resize(tty, &ws);
950 }
951
952 if (CON_IS_VISIBLE(vc))
953 update_screen(vc);
954 vt_event_post(VT_EVENT_RESIZE, vc->vc_num, vc->vc_num);
955 return err;
956 }
957
958 /**
959 * vc_resize - resize a VT
960 * @vc: virtual console
961 * @cols: columns
962 * @rows: rows
963 *
964 * Resize a virtual console as seen from the console end of things. We
965 * use the common vc_do_resize methods to update the structures. The
966 * caller must hold the console sem to protect console internals and
967 * vc->port.tty
968 */
969
970 int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int rows)
971 {
972 return vc_do_resize(vc->port.tty, vc, cols, rows);
973 }
974
975 /**
976 * vt_resize - resize a VT
977 * @tty: tty to resize
978 * @ws: winsize attributes
979 *
980 * Resize a virtual terminal. This is called by the tty layer as we
981 * register our own handler for resizing. The mutual helper does all
982 * the actual work.
983 *
984 * Takes the console sem and the called methods then take the tty
985 * termios_rwsem and the tty ctrl_lock in that order.
986 */
987 static int vt_resize(struct tty_struct *tty, struct winsize *ws)
988 {
989 struct vc_data *vc = tty->driver_data;
990 int ret;
991
992 console_lock();
993 ret = vc_do_resize(tty, vc, ws->ws_col, ws->ws_row);
994 console_unlock();
995 return ret;
996 }
997
998 struct vc_data *vc_deallocate(unsigned int currcons)
999 {
1000 struct vc_data *vc = NULL;
1001
1002 WARN_CONSOLE_UNLOCKED();
1003
1004 if (vc_cons_allocated(currcons)) {
1005 struct vt_notifier_param param;
1006
1007 param.vc = vc = vc_cons[currcons].d;
1008 atomic_notifier_call_chain(&vt_notifier_list, VT_DEALLOCATE, &param);
1009 vcs_remove_sysfs(currcons);
1010 vc->vc_sw->con_deinit(vc);
1011 put_pid(vc->vt_pid);
1012 module_put(vc->vc_sw->owner);
1013 kfree(vc->vc_screenbuf);
1014 vc_cons[currcons].d = NULL;
1015 }
1016 return vc;
1017 }
1018
1019 /*
1020 * VT102 emulator
1021 */
1022
1023 #define set_kbd(vc, x) vt_set_kbd_mode_bit((vc)->vc_num, (x))
1024 #define clr_kbd(vc, x) vt_clr_kbd_mode_bit((vc)->vc_num, (x))
1025 #define is_kbd(vc, x) vt_get_kbd_mode_bit((vc)->vc_num, (x))
1026
1027 #define decarm VC_REPEAT
1028 #define decckm VC_CKMODE
1029 #define kbdapplic VC_APPLIC
1030 #define lnm VC_CRLF
1031
1032 /*
1033 * this is what the terminal answers to a ESC-Z or csi0c query.
1034 */
1035 #define VT100ID "\033[?1;2c"
1036 #define VT102ID "\033[?6c"
1037
1038 unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7,
1039 8,12,10,14, 9,13,11,15 };
1040
1041 /* the default colour table, for VGA+ colour systems */
1042 int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
1043 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
1044 int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
1045 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
1046 int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
1047 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
1048
1049 module_param_array(default_red, int, NULL, S_IRUGO | S_IWUSR);
1050 module_param_array(default_grn, int, NULL, S_IRUGO | S_IWUSR);
1051 module_param_array(default_blu, int, NULL, S_IRUGO | S_IWUSR);
1052
1053 /*
1054 * gotoxy() must verify all boundaries, because the arguments
1055 * might also be negative. If the given position is out of
1056 * bounds, the cursor is placed at the nearest margin.
1057 */
1058 static void gotoxy(struct vc_data *vc, int new_x, int new_y)
1059 {
1060 int min_y, max_y;
1061
1062 if (new_x < 0)
1063 vc->vc_x = 0;
1064 else {
1065 if (new_x >= vc->vc_cols)
1066 vc->vc_x = vc->vc_cols - 1;
1067 else
1068 vc->vc_x = new_x;
1069 }
1070
1071 if (vc->vc_decom) {
1072 min_y = vc->vc_top;
1073 max_y = vc->vc_bottom;
1074 } else {
1075 min_y = 0;
1076 max_y = vc->vc_rows;
1077 }
1078 if (new_y < min_y)
1079 vc->vc_y = min_y;
1080 else if (new_y >= max_y)
1081 vc->vc_y = max_y - 1;
1082 else
1083 vc->vc_y = new_y;
1084 vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1);
1085 vc->vc_need_wrap = 0;
1086 }
1087
1088 /* for absolute user moves, when decom is set */
1089 static void gotoxay(struct vc_data *vc, int new_x, int new_y)
1090 {
1091 gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y);
1092 }
1093
1094 void scrollback(struct vc_data *vc, int lines)
1095 {
1096 if (!lines)
1097 lines = vc->vc_rows / 2;
1098 scrolldelta(-lines);
1099 }
1100
1101 void scrollfront(struct vc_data *vc, int lines)
1102 {
1103 if (!lines)
1104 lines = vc->vc_rows / 2;
1105 scrolldelta(lines);
1106 }
1107
1108 static void lf(struct vc_data *vc)
1109 {
1110 /* don't scroll if above bottom of scrolling region, or
1111 * if below scrolling region
1112 */
1113 if (vc->vc_y + 1 == vc->vc_bottom)
1114 scrup(vc, vc->vc_top, vc->vc_bottom, 1);
1115 else if (vc->vc_y < vc->vc_rows - 1) {
1116 vc->vc_y++;
1117 vc->vc_pos += vc->vc_size_row;
1118 }
1119 vc->vc_need_wrap = 0;
1120 notify_write(vc, '\n');
1121 }
1122
1123 static void ri(struct vc_data *vc)
1124 {
1125 /* don't scroll if below top of scrolling region, or
1126 * if above scrolling region
1127 */
1128 if (vc->vc_y == vc->vc_top)
1129 scrdown(vc, vc->vc_top, vc->vc_bottom, 1);
1130 else if (vc->vc_y > 0) {
1131 vc->vc_y--;
1132 vc->vc_pos -= vc->vc_size_row;
1133 }
1134 vc->vc_need_wrap = 0;
1135 }
1136
1137 static inline void cr(struct vc_data *vc)
1138 {
1139 vc->vc_pos -= vc->vc_x << 1;
1140 vc->vc_need_wrap = vc->vc_x = 0;
1141 notify_write(vc, '\r');
1142 }
1143
1144 static inline void bs(struct vc_data *vc)
1145 {
1146 if (vc->vc_x) {
1147 vc->vc_pos -= 2;
1148 vc->vc_x--;
1149 vc->vc_need_wrap = 0;
1150 notify_write(vc, '\b');
1151 }
1152 }
1153
1154 static inline void del(struct vc_data *vc)
1155 {
1156 /* ignored */
1157 }
1158
1159 static void csi_J(struct vc_data *vc, int vpar)
1160 {
1161 unsigned int count;
1162 unsigned short * start;
1163
1164 switch (vpar) {
1165 case 0: /* erase from cursor to end of display */
1166 count = (vc->vc_scr_end - vc->vc_pos) >> 1;
1167 start = (unsigned short *)vc->vc_pos;
1168 break;
1169 case 1: /* erase from start to cursor */
1170 count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1;
1171 start = (unsigned short *)vc->vc_origin;
1172 break;
1173 case 3: /* erase scroll-back buffer (and whole display) */
1174 scr_memsetw(vc->vc_screenbuf, vc->vc_video_erase_char,
1175 vc->vc_screenbuf_size >> 1);
1176 set_origin(vc);
1177 if (CON_IS_VISIBLE(vc))
1178 update_screen(vc);
1179 /* fall through */
1180 case 2: /* erase whole display */
1181 count = vc->vc_cols * vc->vc_rows;
1182 start = (unsigned short *)vc->vc_origin;
1183 break;
1184 default:
1185 return;
1186 }
1187 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1188 if (DO_UPDATE(vc))
1189 do_update_region(vc, (unsigned long) start, count);
1190 vc->vc_need_wrap = 0;
1191 }
1192
1193 static void csi_K(struct vc_data *vc, int vpar)
1194 {
1195 unsigned int count;
1196 unsigned short * start;
1197
1198 switch (vpar) {
1199 case 0: /* erase from cursor to end of line */
1200 count = vc->vc_cols - vc->vc_x;
1201 start = (unsigned short *)vc->vc_pos;
1202 break;
1203 case 1: /* erase from start of line to cursor */
1204 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1205 count = vc->vc_x + 1;
1206 break;
1207 case 2: /* erase whole line */
1208 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1209 count = vc->vc_cols;
1210 break;
1211 default:
1212 return;
1213 }
1214 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1215 vc->vc_need_wrap = 0;
1216 if (DO_UPDATE(vc))
1217 do_update_region(vc, (unsigned long) start, count);
1218 }
1219
1220 static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */
1221 { /* not vt100? */
1222 int count;
1223
1224 if (!vpar)
1225 vpar++;
1226 count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar;
1227
1228 scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count);
1229 if (DO_UPDATE(vc))
1230 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count);
1231 vc->vc_need_wrap = 0;
1232 }
1233
1234 static void default_attr(struct vc_data *vc)
1235 {
1236 vc->vc_intensity = 1;
1237 vc->vc_italic = 0;
1238 vc->vc_underline = 0;
1239 vc->vc_reverse = 0;
1240 vc->vc_blink = 0;
1241 vc->vc_color = vc->vc_def_color;
1242 }
1243
1244 struct rgb { u8 r; u8 g; u8 b; };
1245
1246 static struct rgb rgb_from_256(int i)
1247 {
1248 struct rgb c;
1249 if (i < 8) { /* Standard colours. */
1250 c.r = i&1 ? 0xaa : 0x00;
1251 c.g = i&2 ? 0xaa : 0x00;
1252 c.b = i&4 ? 0xaa : 0x00;
1253 } else if (i < 16) {
1254 c.r = i&1 ? 0xff : 0x55;
1255 c.g = i&2 ? 0xff : 0x55;
1256 c.b = i&4 ? 0xff : 0x55;
1257 } else if (i < 232) { /* 6x6x6 colour cube. */
1258 c.r = (i - 16) / 36 * 85 / 2;
1259 c.g = (i - 16) / 6 % 6 * 85 / 2;
1260 c.b = (i - 16) % 6 * 85 / 2;
1261 } else /* Grayscale ramp. */
1262 c.r = c.g = c.b = i * 10 - 2312;
1263 return c;
1264 }
1265
1266 static void rgb_foreground(struct vc_data *vc, struct rgb c)
1267 {
1268 u8 hue, max = c.r;
1269 if (c.g > max)
1270 max = c.g;
1271 if (c.b > max)
1272 max = c.b;
1273 hue = (c.r > max/2 ? 4 : 0)
1274 | (c.g > max/2 ? 2 : 0)
1275 | (c.b > max/2 ? 1 : 0);
1276 if (hue == 7 && max <= 0x55)
1277 hue = 0, vc->vc_intensity = 2;
1278 else
1279 vc->vc_intensity = (max > 0xaa) + 1;
1280 vc->vc_color = (vc->vc_color & 0xf0) | hue;
1281 }
1282
1283 static void rgb_background(struct vc_data *vc, struct rgb c)
1284 {
1285 /* For backgrounds, err on the dark side. */
1286 vc->vc_color = (vc->vc_color & 0x0f)
1287 | (c.r&0x80) >> 1 | (c.g&0x80) >> 2 | (c.b&0x80) >> 3;
1288 }
1289
1290 /* console_lock is held */
1291 static void csi_m(struct vc_data *vc)
1292 {
1293 int i;
1294
1295 for (i = 0; i <= vc->vc_npar; i++)
1296 switch (vc->vc_par[i]) {
1297 case 0: /* all attributes off */
1298 default_attr(vc);
1299 break;
1300 case 1:
1301 vc->vc_intensity = 2;
1302 break;
1303 case 2:
1304 vc->vc_intensity = 0;
1305 break;
1306 case 3:
1307 vc->vc_italic = 1;
1308 break;
1309 case 4:
1310 vc->vc_underline = 1;
1311 break;
1312 case 5:
1313 vc->vc_blink = 1;
1314 break;
1315 case 7:
1316 vc->vc_reverse = 1;
1317 break;
1318 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1319 * Select primary font, don't display
1320 * control chars if defined, don't set
1321 * bit 8 on output.
1322 */
1323 vc->vc_translate = set_translate(vc->vc_charset == 0
1324 ? vc->vc_G0_charset
1325 : vc->vc_G1_charset, vc);
1326 vc->vc_disp_ctrl = 0;
1327 vc->vc_toggle_meta = 0;
1328 break;
1329 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1330 * Select first alternate font, lets
1331 * chars < 32 be displayed as ROM chars.
1332 */
1333 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1334 vc->vc_disp_ctrl = 1;
1335 vc->vc_toggle_meta = 0;
1336 break;
1337 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1338 * Select second alternate font, toggle
1339 * high bit before displaying as ROM char.
1340 */
1341 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1342 vc->vc_disp_ctrl = 1;
1343 vc->vc_toggle_meta = 1;
1344 break;
1345 case 21:
1346 case 22:
1347 vc->vc_intensity = 1;
1348 break;
1349 case 23:
1350 vc->vc_italic = 0;
1351 break;
1352 case 24:
1353 vc->vc_underline = 0;
1354 break;
1355 case 25:
1356 vc->vc_blink = 0;
1357 break;
1358 case 27:
1359 vc->vc_reverse = 0;
1360 break;
1361 case 38: /* ITU T.416
1362 * Higher colour modes.
1363 * They break the usual properties of SGR codes
1364 * and thus need to be detected and ignored by
1365 * hand. Strictly speaking, that standard also
1366 * wants : rather than ; as separators, contrary
1367 * to ECMA-48, but no one produces such codes
1368 * and almost no one accepts them.
1369 */
1370 i++;
1371 if (i > vc->vc_npar)
1372 break;
1373 if (vc->vc_par[i] == 5 && /* 256 colours */
1374 i < vc->vc_npar) { /* ubiquitous */
1375 i++;
1376 rgb_foreground(vc,
1377 rgb_from_256(vc->vc_par[i]));
1378 } else if (vc->vc_par[i] == 2 && /* 24 bit */
1379 i <= vc->vc_npar + 3) {/* extremely rare */
1380 struct rgb c = {
1381 .r = vc->vc_par[i + 1],
1382 .g = vc->vc_par[i + 2],
1383 .b = vc->vc_par[i + 3],
1384 };
1385 rgb_foreground(vc, c);
1386 i += 3;
1387 }
1388 /* Subcommands 3 (CMY) and 4 (CMYK) are so insane
1389 * there's no point in supporting them.
1390 */
1391 break;
1392 case 48:
1393 i++;
1394 if (i > vc->vc_npar)
1395 break;
1396 if (vc->vc_par[i] == 5 && /* 256 colours */
1397 i < vc->vc_npar) {
1398 i++;
1399 rgb_background(vc,
1400 rgb_from_256(vc->vc_par[i]));
1401 } else if (vc->vc_par[i] == 2 && /* 24 bit */
1402 i <= vc->vc_npar + 3) {
1403 struct rgb c = {
1404 .r = vc->vc_par[i + 1],
1405 .g = vc->vc_par[i + 2],
1406 .b = vc->vc_par[i + 3],
1407 };
1408 rgb_background(vc, c);
1409 i += 3;
1410 }
1411 break;
1412 case 39:
1413 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1414 break;
1415 case 49:
1416 vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f);
1417 break;
1418 default:
1419 if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37)
1420 vc->vc_color = color_table[vc->vc_par[i] - 30]
1421 | (vc->vc_color & 0xf0);
1422 else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47)
1423 vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4)
1424 | (vc->vc_color & 0x0f);
1425 break;
1426 }
1427 update_attr(vc);
1428 }
1429
1430 static void respond_string(const char *p, struct tty_port *port)
1431 {
1432 while (*p) {
1433 tty_insert_flip_char(port, *p, 0);
1434 p++;
1435 }
1436 tty_schedule_flip(port);
1437 }
1438
1439 static void cursor_report(struct vc_data *vc, struct tty_struct *tty)
1440 {
1441 char buf[40];
1442
1443 sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1);
1444 respond_string(buf, tty->port);
1445 }
1446
1447 static inline void status_report(struct tty_struct *tty)
1448 {
1449 respond_string("\033[0n", tty->port); /* Terminal ok */
1450 }
1451
1452 static inline void respond_ID(struct tty_struct *tty)
1453 {
1454 respond_string(VT102ID, tty->port);
1455 }
1456
1457 void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry)
1458 {
1459 char buf[8];
1460
1461 sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx),
1462 (char)('!' + mry));
1463 respond_string(buf, tty->port);
1464 }
1465
1466 /* invoked via ioctl(TIOCLINUX) and through set_selection */
1467 int mouse_reporting(void)
1468 {
1469 return vc_cons[fg_console].d->vc_report_mouse;
1470 }
1471
1472 /* console_lock is held */
1473 static void set_mode(struct vc_data *vc, int on_off)
1474 {
1475 int i;
1476
1477 for (i = 0; i <= vc->vc_npar; i++)
1478 if (vc->vc_ques) {
1479 switch(vc->vc_par[i]) { /* DEC private modes set/reset */
1480 case 1: /* Cursor keys send ^[Ox/^[[x */
1481 if (on_off)
1482 set_kbd(vc, decckm);
1483 else
1484 clr_kbd(vc, decckm);
1485 break;
1486 case 3: /* 80/132 mode switch unimplemented */
1487 vc->vc_deccolm = on_off;
1488 #if 0
1489 vc_resize(deccolm ? 132 : 80, vc->vc_rows);
1490 /* this alone does not suffice; some user mode
1491 utility has to change the hardware regs */
1492 #endif
1493 break;
1494 case 5: /* Inverted screen on/off */
1495 if (vc->vc_decscnm != on_off) {
1496 vc->vc_decscnm = on_off;
1497 invert_screen(vc, 0, vc->vc_screenbuf_size, 0);
1498 update_attr(vc);
1499 }
1500 break;
1501 case 6: /* Origin relative/absolute */
1502 vc->vc_decom = on_off;
1503 gotoxay(vc, 0, 0);
1504 break;
1505 case 7: /* Autowrap on/off */
1506 vc->vc_decawm = on_off;
1507 break;
1508 case 8: /* Autorepeat on/off */
1509 if (on_off)
1510 set_kbd(vc, decarm);
1511 else
1512 clr_kbd(vc, decarm);
1513 break;
1514 case 9:
1515 vc->vc_report_mouse = on_off ? 1 : 0;
1516 break;
1517 case 25: /* Cursor on/off */
1518 vc->vc_deccm = on_off;
1519 break;
1520 case 1000:
1521 vc->vc_report_mouse = on_off ? 2 : 0;
1522 break;
1523 }
1524 } else {
1525 switch(vc->vc_par[i]) { /* ANSI modes set/reset */
1526 case 3: /* Monitor (display ctrls) */
1527 vc->vc_disp_ctrl = on_off;
1528 break;
1529 case 4: /* Insert Mode on/off */
1530 vc->vc_decim = on_off;
1531 break;
1532 case 20: /* Lf, Enter == CrLf/Lf */
1533 if (on_off)
1534 set_kbd(vc, lnm);
1535 else
1536 clr_kbd(vc, lnm);
1537 break;
1538 }
1539 }
1540 }
1541
1542 /* console_lock is held */
1543 static void setterm_command(struct vc_data *vc)
1544 {
1545 switch(vc->vc_par[0]) {
1546 case 1: /* set color for underline mode */
1547 if (vc->vc_can_do_color &&
1548 vc->vc_par[1] < 16) {
1549 vc->vc_ulcolor = color_table[vc->vc_par[1]];
1550 if (vc->vc_underline)
1551 update_attr(vc);
1552 }
1553 break;
1554 case 2: /* set color for half intensity mode */
1555 if (vc->vc_can_do_color &&
1556 vc->vc_par[1] < 16) {
1557 vc->vc_halfcolor = color_table[vc->vc_par[1]];
1558 if (vc->vc_intensity == 0)
1559 update_attr(vc);
1560 }
1561 break;
1562 case 8: /* store colors as defaults */
1563 vc->vc_def_color = vc->vc_attr;
1564 if (vc->vc_hi_font_mask == 0x100)
1565 vc->vc_def_color >>= 1;
1566 default_attr(vc);
1567 update_attr(vc);
1568 break;
1569 case 9: /* set blanking interval */
1570 blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60;
1571 poke_blanked_console();
1572 break;
1573 case 10: /* set bell frequency in Hz */
1574 if (vc->vc_npar >= 1)
1575 vc->vc_bell_pitch = vc->vc_par[1];
1576 else
1577 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1578 break;
1579 case 11: /* set bell duration in msec */
1580 if (vc->vc_npar >= 1)
1581 vc->vc_bell_duration = (vc->vc_par[1] < 2000) ?
1582 msecs_to_jiffies(vc->vc_par[1]) : 0;
1583 else
1584 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1585 break;
1586 case 12: /* bring specified console to the front */
1587 if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1))
1588 set_console(vc->vc_par[1] - 1);
1589 break;
1590 case 13: /* unblank the screen */
1591 poke_blanked_console();
1592 break;
1593 case 14: /* set vesa powerdown interval */
1594 vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1595 break;
1596 case 15: /* activate the previous console */
1597 set_console(last_console);
1598 break;
1599 case 16: /* set cursor blink duration in msec */
1600 if (vc->vc_npar >= 1 && vc->vc_par[1] >= 50 &&
1601 vc->vc_par[1] <= USHRT_MAX)
1602 vc->vc_cur_blink_ms = vc->vc_par[1];
1603 else
1604 vc->vc_cur_blink_ms = DEFAULT_CURSOR_BLINK_MS;
1605 break;
1606 }
1607 }
1608
1609 /* console_lock is held */
1610 static void csi_at(struct vc_data *vc, unsigned int nr)
1611 {
1612 if (nr > vc->vc_cols - vc->vc_x)
1613 nr = vc->vc_cols - vc->vc_x;
1614 else if (!nr)
1615 nr = 1;
1616 insert_char(vc, nr);
1617 }
1618
1619 /* console_lock is held */
1620 static void csi_L(struct vc_data *vc, unsigned int nr)
1621 {
1622 if (nr > vc->vc_rows - vc->vc_y)
1623 nr = vc->vc_rows - vc->vc_y;
1624 else if (!nr)
1625 nr = 1;
1626 scrdown(vc, vc->vc_y, vc->vc_bottom, nr);
1627 vc->vc_need_wrap = 0;
1628 }
1629
1630 /* console_lock is held */
1631 static void csi_P(struct vc_data *vc, unsigned int nr)
1632 {
1633 if (nr > vc->vc_cols - vc->vc_x)
1634 nr = vc->vc_cols - vc->vc_x;
1635 else if (!nr)
1636 nr = 1;
1637 delete_char(vc, nr);
1638 }
1639
1640 /* console_lock is held */
1641 static void csi_M(struct vc_data *vc, unsigned int nr)
1642 {
1643 if (nr > vc->vc_rows - vc->vc_y)
1644 nr = vc->vc_rows - vc->vc_y;
1645 else if (!nr)
1646 nr=1;
1647 scrup(vc, vc->vc_y, vc->vc_bottom, nr);
1648 vc->vc_need_wrap = 0;
1649 }
1650
1651 /* console_lock is held (except via vc_init->reset_terminal */
1652 static void save_cur(struct vc_data *vc)
1653 {
1654 vc->vc_saved_x = vc->vc_x;
1655 vc->vc_saved_y = vc->vc_y;
1656 vc->vc_s_intensity = vc->vc_intensity;
1657 vc->vc_s_italic = vc->vc_italic;
1658 vc->vc_s_underline = vc->vc_underline;
1659 vc->vc_s_blink = vc->vc_blink;
1660 vc->vc_s_reverse = vc->vc_reverse;
1661 vc->vc_s_charset = vc->vc_charset;
1662 vc->vc_s_color = vc->vc_color;
1663 vc->vc_saved_G0 = vc->vc_G0_charset;
1664 vc->vc_saved_G1 = vc->vc_G1_charset;
1665 }
1666
1667 /* console_lock is held */
1668 static void restore_cur(struct vc_data *vc)
1669 {
1670 gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y);
1671 vc->vc_intensity = vc->vc_s_intensity;
1672 vc->vc_italic = vc->vc_s_italic;
1673 vc->vc_underline = vc->vc_s_underline;
1674 vc->vc_blink = vc->vc_s_blink;
1675 vc->vc_reverse = vc->vc_s_reverse;
1676 vc->vc_charset = vc->vc_s_charset;
1677 vc->vc_color = vc->vc_s_color;
1678 vc->vc_G0_charset = vc->vc_saved_G0;
1679 vc->vc_G1_charset = vc->vc_saved_G1;
1680 vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc);
1681 update_attr(vc);
1682 vc->vc_need_wrap = 0;
1683 }
1684
1685 enum { ESnormal, ESesc, ESsquare, ESgetpars, ESfunckey,
1686 EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd,
1687 ESpalette, ESosc };
1688
1689 /* console_lock is held (except via vc_init()) */
1690 static void reset_terminal(struct vc_data *vc, int do_clear)
1691 {
1692 vc->vc_top = 0;
1693 vc->vc_bottom = vc->vc_rows;
1694 vc->vc_state = ESnormal;
1695 vc->vc_ques = 0;
1696 vc->vc_translate = set_translate(LAT1_MAP, vc);
1697 vc->vc_G0_charset = LAT1_MAP;
1698 vc->vc_G1_charset = GRAF_MAP;
1699 vc->vc_charset = 0;
1700 vc->vc_need_wrap = 0;
1701 vc->vc_report_mouse = 0;
1702 vc->vc_utf = default_utf8;
1703 vc->vc_utf_count = 0;
1704
1705 vc->vc_disp_ctrl = 0;
1706 vc->vc_toggle_meta = 0;
1707
1708 vc->vc_decscnm = 0;
1709 vc->vc_decom = 0;
1710 vc->vc_decawm = 1;
1711 vc->vc_deccm = global_cursor_default;
1712 vc->vc_decim = 0;
1713
1714 vt_reset_keyboard(vc->vc_num);
1715
1716 vc->vc_cursor_type = cur_default;
1717 vc->vc_complement_mask = vc->vc_s_complement_mask;
1718
1719 default_attr(vc);
1720 update_attr(vc);
1721
1722 vc->vc_tab_stop[0] = 0x01010100;
1723 vc->vc_tab_stop[1] =
1724 vc->vc_tab_stop[2] =
1725 vc->vc_tab_stop[3] =
1726 vc->vc_tab_stop[4] =
1727 vc->vc_tab_stop[5] =
1728 vc->vc_tab_stop[6] =
1729 vc->vc_tab_stop[7] = 0x01010101;
1730
1731 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1732 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1733 vc->vc_cur_blink_ms = DEFAULT_CURSOR_BLINK_MS;
1734
1735 gotoxy(vc, 0, 0);
1736 save_cur(vc);
1737 if (do_clear)
1738 csi_J(vc, 2);
1739 }
1740
1741 /* console_lock is held */
1742 static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
1743 {
1744 /*
1745 * Control characters can be used in the _middle_
1746 * of an escape sequence.
1747 */
1748 if (vc->vc_state == ESosc && c>=8 && c<=13) /* ... except for OSC */
1749 return;
1750 switch (c) {
1751 case 0:
1752 return;
1753 case 7:
1754 if (vc->vc_state == ESosc)
1755 vc->vc_state = ESnormal;
1756 else if (vc->vc_bell_duration)
1757 kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration);
1758 return;
1759 case 8:
1760 bs(vc);
1761 return;
1762 case 9:
1763 vc->vc_pos -= (vc->vc_x << 1);
1764 while (vc->vc_x < vc->vc_cols - 1) {
1765 vc->vc_x++;
1766 if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31)))
1767 break;
1768 }
1769 vc->vc_pos += (vc->vc_x << 1);
1770 notify_write(vc, '\t');
1771 return;
1772 case 10: case 11: case 12:
1773 lf(vc);
1774 if (!is_kbd(vc, lnm))
1775 return;
1776 case 13:
1777 cr(vc);
1778 return;
1779 case 14:
1780 vc->vc_charset = 1;
1781 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1782 vc->vc_disp_ctrl = 1;
1783 return;
1784 case 15:
1785 vc->vc_charset = 0;
1786 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1787 vc->vc_disp_ctrl = 0;
1788 return;
1789 case 24: case 26:
1790 vc->vc_state = ESnormal;
1791 return;
1792 case 27:
1793 vc->vc_state = ESesc;
1794 return;
1795 case 127:
1796 del(vc);
1797 return;
1798 case 128+27:
1799 vc->vc_state = ESsquare;
1800 return;
1801 }
1802 switch(vc->vc_state) {
1803 case ESesc:
1804 vc->vc_state = ESnormal;
1805 switch (c) {
1806 case '[':
1807 vc->vc_state = ESsquare;
1808 return;
1809 case ']':
1810 vc->vc_state = ESnonstd;
1811 return;
1812 case '%':
1813 vc->vc_state = ESpercent;
1814 return;
1815 case 'E':
1816 cr(vc);
1817 lf(vc);
1818 return;
1819 case 'M':
1820 ri(vc);
1821 return;
1822 case 'D':
1823 lf(vc);
1824 return;
1825 case 'H':
1826 vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31));
1827 return;
1828 case 'Z':
1829 respond_ID(tty);
1830 return;
1831 case '7':
1832 save_cur(vc);
1833 return;
1834 case '8':
1835 restore_cur(vc);
1836 return;
1837 case '(':
1838 vc->vc_state = ESsetG0;
1839 return;
1840 case ')':
1841 vc->vc_state = ESsetG1;
1842 return;
1843 case '#':
1844 vc->vc_state = EShash;
1845 return;
1846 case 'c':
1847 reset_terminal(vc, 1);
1848 return;
1849 case '>': /* Numeric keypad */
1850 clr_kbd(vc, kbdapplic);
1851 return;
1852 case '=': /* Appl. keypad */
1853 set_kbd(vc, kbdapplic);
1854 return;
1855 }
1856 return;
1857 case ESnonstd:
1858 if (c=='P') { /* palette escape sequence */
1859 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1860 vc->vc_par[vc->vc_npar] = 0;
1861 vc->vc_npar = 0;
1862 vc->vc_state = ESpalette;
1863 return;
1864 } else if (c=='R') { /* reset palette */
1865 reset_palette(vc);
1866 vc->vc_state = ESnormal;
1867 } else if (c>='0' && c<='9')
1868 vc->vc_state = ESosc;
1869 else
1870 vc->vc_state = ESnormal;
1871 return;
1872 case ESpalette:
1873 if (isxdigit(c)) {
1874 vc->vc_par[vc->vc_npar++] = hex_to_bin(c);
1875 if (vc->vc_npar == 7) {
1876 int i = vc->vc_par[0] * 3, j = 1;
1877 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1878 vc->vc_palette[i++] += vc->vc_par[j++];
1879 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1880 vc->vc_palette[i++] += vc->vc_par[j++];
1881 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1882 vc->vc_palette[i] += vc->vc_par[j];
1883 set_palette(vc);
1884 vc->vc_state = ESnormal;
1885 }
1886 } else
1887 vc->vc_state = ESnormal;
1888 return;
1889 case ESsquare:
1890 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1891 vc->vc_par[vc->vc_npar] = 0;
1892 vc->vc_npar = 0;
1893 vc->vc_state = ESgetpars;
1894 if (c == '[') { /* Function key */
1895 vc->vc_state=ESfunckey;
1896 return;
1897 }
1898 vc->vc_ques = (c == '?');
1899 if (vc->vc_ques)
1900 return;
1901 case ESgetpars:
1902 if (c == ';' && vc->vc_npar < NPAR - 1) {
1903 vc->vc_npar++;
1904 return;
1905 } else if (c>='0' && c<='9') {
1906 vc->vc_par[vc->vc_npar] *= 10;
1907 vc->vc_par[vc->vc_npar] += c - '0';
1908 return;
1909 }
1910 vc->vc_state = ESnormal;
1911 switch(c) {
1912 case 'h':
1913 set_mode(vc, 1);
1914 return;
1915 case 'l':
1916 set_mode(vc, 0);
1917 return;
1918 case 'c':
1919 if (vc->vc_ques) {
1920 if (vc->vc_par[0])
1921 vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16);
1922 else
1923 vc->vc_cursor_type = cur_default;
1924 return;
1925 }
1926 break;
1927 case 'm':
1928 if (vc->vc_ques) {
1929 clear_selection();
1930 if (vc->vc_par[0])
1931 vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1];
1932 else
1933 vc->vc_complement_mask = vc->vc_s_complement_mask;
1934 return;
1935 }
1936 break;
1937 case 'n':
1938 if (!vc->vc_ques) {
1939 if (vc->vc_par[0] == 5)
1940 status_report(tty);
1941 else if (vc->vc_par[0] == 6)
1942 cursor_report(vc, tty);
1943 }
1944 return;
1945 }
1946 if (vc->vc_ques) {
1947 vc->vc_ques = 0;
1948 return;
1949 }
1950 switch(c) {
1951 case 'G': case '`':
1952 if (vc->vc_par[0])
1953 vc->vc_par[0]--;
1954 gotoxy(vc, vc->vc_par[0], vc->vc_y);
1955 return;
1956 case 'A':
1957 if (!vc->vc_par[0])
1958 vc->vc_par[0]++;
1959 gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]);
1960 return;
1961 case 'B': case 'e':
1962 if (!vc->vc_par[0])
1963 vc->vc_par[0]++;
1964 gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]);
1965 return;
1966 case 'C': case 'a':
1967 if (!vc->vc_par[0])
1968 vc->vc_par[0]++;
1969 gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y);
1970 return;
1971 case 'D':
1972 if (!vc->vc_par[0])
1973 vc->vc_par[0]++;
1974 gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y);
1975 return;
1976 case 'E':
1977 if (!vc->vc_par[0])
1978 vc->vc_par[0]++;
1979 gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]);
1980 return;
1981 case 'F':
1982 if (!vc->vc_par[0])
1983 vc->vc_par[0]++;
1984 gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]);
1985 return;
1986 case 'd':
1987 if (vc->vc_par[0])
1988 vc->vc_par[0]--;
1989 gotoxay(vc, vc->vc_x ,vc->vc_par[0]);
1990 return;
1991 case 'H': case 'f':
1992 if (vc->vc_par[0])
1993 vc->vc_par[0]--;
1994 if (vc->vc_par[1])
1995 vc->vc_par[1]--;
1996 gotoxay(vc, vc->vc_par[1], vc->vc_par[0]);
1997 return;
1998 case 'J':
1999 csi_J(vc, vc->vc_par[0]);
2000 return;
2001 case 'K':
2002 csi_K(vc, vc->vc_par[0]);
2003 return;
2004 case 'L':
2005 csi_L(vc, vc->vc_par[0]);
2006 return;
2007 case 'M':
2008 csi_M(vc, vc->vc_par[0]);
2009 return;
2010 case 'P':
2011 csi_P(vc, vc->vc_par[0]);
2012 return;
2013 case 'c':
2014 if (!vc->vc_par[0])
2015 respond_ID(tty);
2016 return;
2017 case 'g':
2018 if (!vc->vc_par[0])
2019 vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31));
2020 else if (vc->vc_par[0] == 3) {
2021 vc->vc_tab_stop[0] =
2022 vc->vc_tab_stop[1] =
2023 vc->vc_tab_stop[2] =
2024 vc->vc_tab_stop[3] =
2025 vc->vc_tab_stop[4] =
2026 vc->vc_tab_stop[5] =
2027 vc->vc_tab_stop[6] =
2028 vc->vc_tab_stop[7] = 0;
2029 }
2030 return;
2031 case 'm':
2032 csi_m(vc);
2033 return;
2034 case 'q': /* DECLL - but only 3 leds */
2035 /* map 0,1,2,3 to 0,1,2,4 */
2036 if (vc->vc_par[0] < 4)
2037 vt_set_led_state(vc->vc_num,
2038 (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4);
2039 return;
2040 case 'r':
2041 if (!vc->vc_par[0])
2042 vc->vc_par[0]++;
2043 if (!vc->vc_par[1])
2044 vc->vc_par[1] = vc->vc_rows;
2045 /* Minimum allowed region is 2 lines */
2046 if (vc->vc_par[0] < vc->vc_par[1] &&
2047 vc->vc_par[1] <= vc->vc_rows) {
2048 vc->vc_top = vc->vc_par[0] - 1;
2049 vc->vc_bottom = vc->vc_par[1];
2050 gotoxay(vc, 0, 0);
2051 }
2052 return;
2053 case 's':
2054 save_cur(vc);
2055 return;
2056 case 'u':
2057 restore_cur(vc);
2058 return;
2059 case 'X':
2060 csi_X(vc, vc->vc_par[0]);
2061 return;
2062 case '@':
2063 csi_at(vc, vc->vc_par[0]);
2064 return;
2065 case ']': /* setterm functions */
2066 setterm_command(vc);
2067 return;
2068 }
2069 return;
2070 case ESpercent:
2071 vc->vc_state = ESnormal;
2072 switch (c) {
2073 case '@': /* defined in ISO 2022 */
2074 vc->vc_utf = 0;
2075 return;
2076 case 'G': /* prelim official escape code */
2077 case '8': /* retained for compatibility */
2078 vc->vc_utf = 1;
2079 return;
2080 }
2081 return;
2082 case ESfunckey:
2083 vc->vc_state = ESnormal;
2084 return;
2085 case EShash:
2086 vc->vc_state = ESnormal;
2087 if (c == '8') {
2088 /* DEC screen alignment test. kludge :-) */
2089 vc->vc_video_erase_char =
2090 (vc->vc_video_erase_char & 0xff00) | 'E';
2091 csi_J(vc, 2);
2092 vc->vc_video_erase_char =
2093 (vc->vc_video_erase_char & 0xff00) | ' ';
2094 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
2095 }
2096 return;
2097 case ESsetG0:
2098 if (c == '0')
2099 vc->vc_G0_charset = GRAF_MAP;
2100 else if (c == 'B')
2101 vc->vc_G0_charset = LAT1_MAP;
2102 else if (c == 'U')
2103 vc->vc_G0_charset = IBMPC_MAP;
2104 else if (c == 'K')
2105 vc->vc_G0_charset = USER_MAP;
2106 if (vc->vc_charset == 0)
2107 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
2108 vc->vc_state = ESnormal;
2109 return;
2110 case ESsetG1:
2111 if (c == '0')
2112 vc->vc_G1_charset = GRAF_MAP;
2113 else if (c == 'B')
2114 vc->vc_G1_charset = LAT1_MAP;
2115 else if (c == 'U')
2116 vc->vc_G1_charset = IBMPC_MAP;
2117 else if (c == 'K')
2118 vc->vc_G1_charset = USER_MAP;
2119 if (vc->vc_charset == 1)
2120 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
2121 vc->vc_state = ESnormal;
2122 return;
2123 case ESosc:
2124 return;
2125 default:
2126 vc->vc_state = ESnormal;
2127 }
2128 }
2129
2130 /* is_double_width() is based on the wcwidth() implementation by
2131 * Markus Kuhn -- 2007-05-26 (Unicode 5.0)
2132 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
2133 */
2134 struct interval {
2135 uint32_t first;
2136 uint32_t last;
2137 };
2138
2139 static int bisearch(uint32_t ucs, const struct interval *table, int max)
2140 {
2141 int min = 0;
2142 int mid;
2143
2144 if (ucs < table[0].first || ucs > table[max].last)
2145 return 0;
2146 while (max >= min) {
2147 mid = (min + max) / 2;
2148 if (ucs > table[mid].last)
2149 min = mid + 1;
2150 else if (ucs < table[mid].first)
2151 max = mid - 1;
2152 else
2153 return 1;
2154 }
2155 return 0;
2156 }
2157
2158 static int is_double_width(uint32_t ucs)
2159 {
2160 static const struct interval double_width[] = {
2161 { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E },
2162 { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF },
2163 { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 },
2164 { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD }
2165 };
2166 return bisearch(ucs, double_width, ARRAY_SIZE(double_width) - 1);
2167 }
2168
2169 /* acquires console_lock */
2170 static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2171 {
2172 #ifdef VT_BUF_VRAM_ONLY
2173 #define FLUSH do { } while(0);
2174 #else
2175 #define FLUSH if (draw_x >= 0) { \
2176 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
2177 draw_x = -1; \
2178 }
2179 #endif
2180
2181 int c, tc, ok, n = 0, draw_x = -1;
2182 unsigned int currcons;
2183 unsigned long draw_from = 0, draw_to = 0;
2184 struct vc_data *vc;
2185 unsigned char vc_attr;
2186 struct vt_notifier_param param;
2187 uint8_t rescan;
2188 uint8_t inverse;
2189 uint8_t width;
2190 u16 himask, charmask;
2191
2192 if (in_interrupt())
2193 return count;
2194
2195 might_sleep();
2196
2197 console_lock();
2198 vc = tty->driver_data;
2199 if (vc == NULL) {
2200 printk(KERN_ERR "vt: argh, driver_data is NULL !\n");
2201 console_unlock();
2202 return 0;
2203 }
2204
2205 currcons = vc->vc_num;
2206 if (!vc_cons_allocated(currcons)) {
2207 /* could this happen? */
2208 pr_warn_once("con_write: tty %d not allocated\n", currcons+1);
2209 console_unlock();
2210 return 0;
2211 }
2212
2213 himask = vc->vc_hi_font_mask;
2214 charmask = himask ? 0x1ff : 0xff;
2215
2216 /* undraw cursor first */
2217 if (IS_FG(vc))
2218 hide_cursor(vc);
2219
2220 param.vc = vc;
2221
2222 while (!tty->stopped && count) {
2223 int orig = *buf;
2224 c = orig;
2225 buf++;
2226 n++;
2227 count--;
2228 rescan = 0;
2229 inverse = 0;
2230 width = 1;
2231
2232 /* Do no translation at all in control states */
2233 if (vc->vc_state != ESnormal) {
2234 tc = c;
2235 } else if (vc->vc_utf && !vc->vc_disp_ctrl) {
2236 /* Combine UTF-8 into Unicode in vc_utf_char.
2237 * vc_utf_count is the number of continuation bytes still
2238 * expected to arrive.
2239 * vc_npar is the number of continuation bytes arrived so
2240 * far
2241 */
2242 rescan_last_byte:
2243 if ((c & 0xc0) == 0x80) {
2244 /* Continuation byte received */
2245 static const uint32_t utf8_length_changes[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff };
2246 if (vc->vc_utf_count) {
2247 vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f);
2248 vc->vc_npar++;
2249 if (--vc->vc_utf_count) {
2250 /* Still need some bytes */
2251 continue;
2252 }
2253 /* Got a whole character */
2254 c = vc->vc_utf_char;
2255 /* Reject overlong sequences */
2256 if (c <= utf8_length_changes[vc->vc_npar - 1] ||
2257 c > utf8_length_changes[vc->vc_npar])
2258 c = 0xfffd;
2259 } else {
2260 /* Unexpected continuation byte */
2261 vc->vc_utf_count = 0;
2262 c = 0xfffd;
2263 }
2264 } else {
2265 /* Single ASCII byte or first byte of a sequence received */
2266 if (vc->vc_utf_count) {
2267 /* Continuation byte expected */
2268 rescan = 1;
2269 vc->vc_utf_count = 0;
2270 c = 0xfffd;
2271 } else if (c > 0x7f) {
2272 /* First byte of a multibyte sequence received */
2273 vc->vc_npar = 0;
2274 if ((c & 0xe0) == 0xc0) {
2275 vc->vc_utf_count = 1;
2276 vc->vc_utf_char = (c & 0x1f);
2277 } else if ((c & 0xf0) == 0xe0) {
2278 vc->vc_utf_count = 2;
2279 vc->vc_utf_char = (c & 0x0f);
2280 } else if ((c & 0xf8) == 0xf0) {
2281 vc->vc_utf_count = 3;
2282 vc->vc_utf_char = (c & 0x07);
2283 } else if ((c & 0xfc) == 0xf8) {
2284 vc->vc_utf_count = 4;
2285 vc->vc_utf_char = (c & 0x03);
2286 } else if ((c & 0xfe) == 0xfc) {
2287 vc->vc_utf_count = 5;
2288 vc->vc_utf_char = (c & 0x01);
2289 } else {
2290 /* 254 and 255 are invalid */
2291 c = 0xfffd;
2292 }
2293 if (vc->vc_utf_count) {
2294 /* Still need some bytes */
2295 continue;
2296 }
2297 }
2298 /* Nothing to do if an ASCII byte was received */
2299 }
2300 /* End of UTF-8 decoding. */
2301 /* c is the received character, or U+FFFD for invalid sequences. */
2302 /* Replace invalid Unicode code points with U+FFFD too */
2303 if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff)
2304 c = 0xfffd;
2305 tc = c;
2306 } else { /* no utf or alternate charset mode */
2307 tc = vc_translate(vc, c);
2308 }
2309
2310 param.c = tc;
2311 if (atomic_notifier_call_chain(&vt_notifier_list, VT_PREWRITE,
2312 &param) == NOTIFY_STOP)
2313 continue;
2314
2315 /* If the original code was a control character we
2316 * only allow a glyph to be displayed if the code is
2317 * not normally used (such as for cursor movement) or
2318 * if the disp_ctrl mode has been explicitly enabled.
2319 * Certain characters (as given by the CTRL_ALWAYS
2320 * bitmap) are always displayed as control characters,
2321 * as the console would be pretty useless without
2322 * them; to display an arbitrary font position use the
2323 * direct-to-font zone in UTF-8 mode.
2324 */
2325 ok = tc && (c >= 32 ||
2326 !(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 :
2327 vc->vc_utf || ((CTRL_ACTION >> c) & 1)))
2328 && (c != 127 || vc->vc_disp_ctrl)
2329 && (c != 128+27);
2330
2331 if (vc->vc_state == ESnormal && ok) {
2332 if (vc->vc_utf && !vc->vc_disp_ctrl) {
2333 if (is_double_width(c))
2334 width = 2;
2335 }
2336 /* Now try to find out how to display it */
2337 tc = conv_uni_to_pc(vc, tc);
2338 if (tc & ~charmask) {
2339 if (tc == -1 || tc == -2) {
2340 continue; /* nothing to display */
2341 }
2342 /* Glyph not found */
2343 if ((!(vc->vc_utf && !vc->vc_disp_ctrl) || c < 128) && !(c & ~charmask)) {
2344 /* In legacy mode use the glyph we get by a 1:1 mapping.
2345 This would make absolutely no sense with Unicode in mind,
2346 but do this for ASCII characters since a font may lack
2347 Unicode mapping info and we don't want to end up with
2348 having question marks only. */
2349 tc = c;
2350 } else {
2351 /* Display U+FFFD. If it's not found, display an inverse question mark. */
2352 tc = conv_uni_to_pc(vc, 0xfffd);
2353 if (tc < 0) {
2354 inverse = 1;
2355 tc = conv_uni_to_pc(vc, '?');
2356 if (tc < 0) tc = '?';
2357 }
2358 }
2359 }
2360
2361 if (!inverse) {
2362 vc_attr = vc->vc_attr;
2363 } else {
2364 /* invert vc_attr */
2365 if (!vc->vc_can_do_color) {
2366 vc_attr = (vc->vc_attr) ^ 0x08;
2367 } else if (vc->vc_hi_font_mask == 0x100) {
2368 vc_attr = ((vc->vc_attr) & 0x11) | (((vc->vc_attr) & 0xe0) >> 4) | (((vc->vc_attr) & 0x0e) << 4);
2369 } else {
2370 vc_attr = ((vc->vc_attr) & 0x88) | (((vc->vc_attr) & 0x70) >> 4) | (((vc->vc_attr) & 0x07) << 4);
2371 }
2372 FLUSH
2373 }
2374
2375 while (1) {
2376 if (vc->vc_need_wrap || vc->vc_decim)
2377 FLUSH
2378 if (vc->vc_need_wrap) {
2379 cr(vc);
2380 lf(vc);
2381 }
2382 if (vc->vc_decim)
2383 insert_char(vc, 1);
2384 scr_writew(himask ?
2385 ((vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) :
2386 (vc_attr << 8) + tc,
2387 (u16 *) vc->vc_pos);
2388 if (DO_UPDATE(vc) && draw_x < 0) {
2389 draw_x = vc->vc_x;
2390 draw_from = vc->vc_pos;
2391 }
2392 if (vc->vc_x == vc->vc_cols - 1) {
2393 vc->vc_need_wrap = vc->vc_decawm;
2394 draw_to = vc->vc_pos + 2;
2395 } else {
2396 vc->vc_x++;
2397 draw_to = (vc->vc_pos += 2);
2398 }
2399
2400 if (!--width) break;
2401
2402 tc = conv_uni_to_pc(vc, ' '); /* A space is printed in the second column */
2403 if (tc < 0) tc = ' ';
2404 }
2405 notify_write(vc, c);
2406
2407 if (inverse) {
2408 FLUSH
2409 }
2410
2411 if (rescan) {
2412 rescan = 0;
2413 inverse = 0;
2414 width = 1;
2415 c = orig;
2416 goto rescan_last_byte;
2417 }
2418 continue;
2419 }
2420 FLUSH
2421 do_con_trol(tty, vc, orig);
2422 }
2423 FLUSH
2424 console_conditional_schedule();
2425 console_unlock();
2426 notify_update(vc);
2427 return n;
2428 #undef FLUSH
2429 }
2430
2431 /*
2432 * This is the console switching callback.
2433 *
2434 * Doing console switching in a process context allows
2435 * us to do the switches asynchronously (needed when we want
2436 * to switch due to a keyboard interrupt). Synchronization
2437 * with other console code and prevention of re-entrancy is
2438 * ensured with console_lock.
2439 */
2440 static void console_callback(struct work_struct *ignored)
2441 {
2442 console_lock();
2443
2444 if (want_console >= 0) {
2445 if (want_console != fg_console &&
2446 vc_cons_allocated(want_console)) {
2447 hide_cursor(vc_cons[fg_console].d);
2448 change_console(vc_cons[want_console].d);
2449 /* we only changed when the console had already
2450 been allocated - a new console is not created
2451 in an interrupt routine */
2452 }
2453 want_console = -1;
2454 }
2455 if (do_poke_blanked_console) { /* do not unblank for a LED change */
2456 do_poke_blanked_console = 0;
2457 poke_blanked_console();
2458 }
2459 if (scrollback_delta) {
2460 struct vc_data *vc = vc_cons[fg_console].d;
2461 clear_selection();
2462 if (vc->vc_mode == KD_TEXT)
2463 vc->vc_sw->con_scrolldelta(vc, scrollback_delta);
2464 scrollback_delta = 0;
2465 }
2466 if (blank_timer_expired) {
2467 do_blank_screen(0);
2468 blank_timer_expired = 0;
2469 }
2470 notify_update(vc_cons[fg_console].d);
2471
2472 console_unlock();
2473 }
2474
2475 int set_console(int nr)
2476 {
2477 struct vc_data *vc = vc_cons[fg_console].d;
2478
2479 if (!vc_cons_allocated(nr) || vt_dont_switch ||
2480 (vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) {
2481
2482 /*
2483 * Console switch will fail in console_callback() or
2484 * change_console() so there is no point scheduling
2485 * the callback
2486 *
2487 * Existing set_console() users don't check the return
2488 * value so this shouldn't break anything
2489 */
2490 return -EINVAL;
2491 }
2492
2493 want_console = nr;
2494 schedule_console_callback();
2495
2496 return 0;
2497 }
2498
2499 struct tty_driver *console_driver;
2500
2501 #ifdef CONFIG_VT_CONSOLE
2502
2503 /**
2504 * vt_kmsg_redirect() - Sets/gets the kernel message console
2505 * @new: The new virtual terminal number or -1 if the console should stay
2506 * unchanged
2507 *
2508 * By default, the kernel messages are always printed on the current virtual
2509 * console. However, the user may modify that default with the
2510 * TIOCL_SETKMSGREDIRECT ioctl call.
2511 *
2512 * This function sets the kernel message console to be @new. It returns the old
2513 * virtual console number. The virtual terminal number 0 (both as parameter and
2514 * return value) means no redirection (i.e. always printed on the currently
2515 * active console).
2516 *
2517 * The parameter -1 means that only the current console is returned, but the
2518 * value is not modified. You may use the macro vt_get_kmsg_redirect() in that
2519 * case to make the code more understandable.
2520 *
2521 * When the kernel is compiled without CONFIG_VT_CONSOLE, this function ignores
2522 * the parameter and always returns 0.
2523 */
2524 int vt_kmsg_redirect(int new)
2525 {
2526 static int kmsg_con;
2527
2528 if (new != -1)
2529 return xchg(&kmsg_con, new);
2530 else
2531 return kmsg_con;
2532 }
2533
2534 /*
2535 * Console on virtual terminal
2536 *
2537 * The console must be locked when we get here.
2538 */
2539
2540 static void vt_console_print(struct console *co, const char *b, unsigned count)
2541 {
2542 struct vc_data *vc = vc_cons[fg_console].d;
2543 unsigned char c;
2544 static DEFINE_SPINLOCK(printing_lock);
2545 const ushort *start;
2546 ushort cnt = 0;
2547 ushort myx;
2548 int kmsg_console;
2549
2550 /* console busy or not yet initialized */
2551 if (!printable)
2552 return;
2553 if (!spin_trylock(&printing_lock))
2554 return;
2555
2556 kmsg_console = vt_get_kmsg_redirect();
2557 if (kmsg_console && vc_cons_allocated(kmsg_console - 1))
2558 vc = vc_cons[kmsg_console - 1].d;
2559
2560 /* read `x' only after setting currcons properly (otherwise
2561 the `x' macro will read the x of the foreground console). */
2562 myx = vc->vc_x;
2563
2564 if (!vc_cons_allocated(fg_console)) {
2565 /* impossible */
2566 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2567 goto quit;
2568 }
2569
2570 if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc))
2571 goto quit;
2572
2573 /* undraw cursor first */
2574 if (IS_FG(vc))
2575 hide_cursor(vc);
2576
2577 start = (ushort *)vc->vc_pos;
2578
2579 /* Contrived structure to try to emulate original need_wrap behaviour
2580 * Problems caused when we have need_wrap set on '\n' character */
2581 while (count--) {
2582 c = *b++;
2583 if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) {
2584 if (cnt > 0) {
2585 if (CON_IS_VISIBLE(vc))
2586 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2587 vc->vc_x += cnt;
2588 if (vc->vc_need_wrap)
2589 vc->vc_x--;
2590 cnt = 0;
2591 }
2592 if (c == 8) { /* backspace */
2593 bs(vc);
2594 start = (ushort *)vc->vc_pos;
2595 myx = vc->vc_x;
2596 continue;
2597 }
2598 if (c != 13)
2599 lf(vc);
2600 cr(vc);
2601 start = (ushort *)vc->vc_pos;
2602 myx = vc->vc_x;
2603 if (c == 10 || c == 13)
2604 continue;
2605 }
2606 scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos);
2607 notify_write(vc, c);
2608 cnt++;
2609 if (myx == vc->vc_cols - 1) {
2610 vc->vc_need_wrap = 1;
2611 continue;
2612 }
2613 vc->vc_pos += 2;
2614 myx++;
2615 }
2616 if (cnt > 0) {
2617 if (CON_IS_VISIBLE(vc))
2618 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2619 vc->vc_x += cnt;
2620 if (vc->vc_x == vc->vc_cols) {
2621 vc->vc_x--;
2622 vc->vc_need_wrap = 1;
2623 }
2624 }
2625 set_cursor(vc);
2626 notify_update(vc);
2627
2628 quit:
2629 spin_unlock(&printing_lock);
2630 }
2631
2632 static struct tty_driver *vt_console_device(struct console *c, int *index)
2633 {
2634 *index = c->index ? c->index-1 : fg_console;
2635 return console_driver;
2636 }
2637
2638 static struct console vt_console_driver = {
2639 .name = "tty",
2640 .write = vt_console_print,
2641 .device = vt_console_device,
2642 .unblank = unblank_screen,
2643 .flags = CON_PRINTBUFFER,
2644 .index = -1,
2645 };
2646 #endif
2647
2648 /*
2649 * Handling of Linux-specific VC ioctls
2650 */
2651
2652 /*
2653 * Generally a bit racy with respect to console_lock();.
2654 *
2655 * There are some functions which don't need it.
2656 *
2657 * There are some functions which can sleep for arbitrary periods
2658 * (paste_selection) but we don't need the lock there anyway.
2659 *
2660 * set_selection has locking, and definitely needs it
2661 */
2662
2663 int tioclinux(struct tty_struct *tty, unsigned long arg)
2664 {
2665 char type, data;
2666 char __user *p = (char __user *)arg;
2667 int lines;
2668 int ret;
2669
2670 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN))
2671 return -EPERM;
2672 if (get_user(type, p))
2673 return -EFAULT;
2674 ret = 0;
2675
2676 switch (type)
2677 {
2678 case TIOCL_SETSEL:
2679 console_lock();
2680 ret = set_selection((struct tiocl_selection __user *)(p+1), tty);
2681 console_unlock();
2682 break;
2683 case TIOCL_PASTESEL:
2684 ret = paste_selection(tty);
2685 break;
2686 case TIOCL_UNBLANKSCREEN:
2687 console_lock();
2688 unblank_screen();
2689 console_unlock();
2690 break;
2691 case TIOCL_SELLOADLUT:
2692 console_lock();
2693 ret = sel_loadlut(p);
2694 console_unlock();
2695 break;
2696 case TIOCL_GETSHIFTSTATE:
2697
2698 /*
2699 * Make it possible to react to Shift+Mousebutton.
2700 * Note that 'shift_state' is an undocumented
2701 * kernel-internal variable; programs not closely
2702 * related to the kernel should not use this.
2703 */
2704 data = vt_get_shift_state();
2705 ret = __put_user(data, p);
2706 break;
2707 case TIOCL_GETMOUSEREPORTING:
2708 console_lock(); /* May be overkill */
2709 data = mouse_reporting();
2710 console_unlock();
2711 ret = __put_user(data, p);
2712 break;
2713 case TIOCL_SETVESABLANK:
2714 console_lock();
2715 ret = set_vesa_blanking(p);
2716 console_unlock();
2717 break;
2718 case TIOCL_GETKMSGREDIRECT:
2719 data = vt_get_kmsg_redirect();
2720 ret = __put_user(data, p);
2721 break;
2722 case TIOCL_SETKMSGREDIRECT:
2723 if (!capable(CAP_SYS_ADMIN)) {
2724 ret = -EPERM;
2725 } else {
2726 if (get_user(data, p+1))
2727 ret = -EFAULT;
2728 else
2729 vt_kmsg_redirect(data);
2730 }
2731 break;
2732 case TIOCL_GETFGCONSOLE:
2733 /* No locking needed as this is a transiently
2734 correct return anyway if the caller hasn't
2735 disabled switching */
2736 ret = fg_console;
2737 break;
2738 case TIOCL_SCROLLCONSOLE:
2739 if (get_user(lines, (s32 __user *)(p+4))) {
2740 ret = -EFAULT;
2741 } else {
2742 /* Need the console lock here. Note that lots
2743 of other calls need fixing before the lock
2744 is actually useful ! */
2745 console_lock();
2746 scrollfront(vc_cons[fg_console].d, lines);
2747 console_unlock();
2748 ret = 0;
2749 }
2750 break;
2751 case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
2752 console_lock();
2753 ignore_poke = 1;
2754 do_blank_screen(0);
2755 console_unlock();
2756 break;
2757 case TIOCL_BLANKEDSCREEN:
2758 ret = console_blanked;
2759 break;
2760 default:
2761 ret = -EINVAL;
2762 break;
2763 }
2764 return ret;
2765 }
2766
2767 /*
2768 * /dev/ttyN handling
2769 */
2770
2771 static int con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2772 {
2773 int retval;
2774
2775 retval = do_con_write(tty, buf, count);
2776 con_flush_chars(tty);
2777
2778 return retval;
2779 }
2780
2781 static int con_put_char(struct tty_struct *tty, unsigned char ch)
2782 {
2783 if (in_interrupt())
2784 return 0; /* n_r3964 calls put_char() from interrupt context */
2785 return do_con_write(tty, &ch, 1);
2786 }
2787
2788 static int con_write_room(struct tty_struct *tty)
2789 {
2790 if (tty->stopped)
2791 return 0;
2792 return 32768; /* No limit, really; we're not buffering */
2793 }
2794
2795 static int con_chars_in_buffer(struct tty_struct *tty)
2796 {
2797 return 0; /* we're not buffering */
2798 }
2799
2800 /*
2801 * con_throttle and con_unthrottle are only used for
2802 * paste_selection(), which has to stuff in a large number of
2803 * characters...
2804 */
2805 static void con_throttle(struct tty_struct *tty)
2806 {
2807 }
2808
2809 static void con_unthrottle(struct tty_struct *tty)
2810 {
2811 struct vc_data *vc = tty->driver_data;
2812
2813 wake_up_interruptible(&vc->paste_wait);
2814 }
2815
2816 /*
2817 * Turn the Scroll-Lock LED on when the tty is stopped
2818 */
2819 static void con_stop(struct tty_struct *tty)
2820 {
2821 int console_num;
2822 if (!tty)
2823 return;
2824 console_num = tty->index;
2825 if (!vc_cons_allocated(console_num))
2826 return;
2827 vt_kbd_con_stop(console_num);
2828 }
2829
2830 /*
2831 * Turn the Scroll-Lock LED off when the console is started
2832 */
2833 static void con_start(struct tty_struct *tty)
2834 {
2835 int console_num;
2836 if (!tty)
2837 return;
2838 console_num = tty->index;
2839 if (!vc_cons_allocated(console_num))
2840 return;
2841 vt_kbd_con_start(console_num);
2842 }
2843
2844 static void con_flush_chars(struct tty_struct *tty)
2845 {
2846 struct vc_data *vc;
2847
2848 if (in_interrupt()) /* from flush_to_ldisc */
2849 return;
2850
2851 /* if we race with con_close(), vt may be null */
2852 console_lock();
2853 vc = tty->driver_data;
2854 if (vc)
2855 set_cursor(vc);
2856 console_unlock();
2857 }
2858
2859 /*
2860 * Allocate the console screen memory.
2861 */
2862 static int con_install(struct tty_driver *driver, struct tty_struct *tty)
2863 {
2864 unsigned int currcons = tty->index;
2865 struct vc_data *vc;
2866 int ret;
2867
2868 console_lock();
2869 ret = vc_allocate(currcons);
2870 if (ret)
2871 goto unlock;
2872
2873 vc = vc_cons[currcons].d;
2874
2875 /* Still being freed */
2876 if (vc->port.tty) {
2877 ret = -ERESTARTSYS;
2878 goto unlock;
2879 }
2880
2881 ret = tty_port_install(&vc->port, driver, tty);
2882 if (ret)
2883 goto unlock;
2884
2885 tty->driver_data = vc;
2886 vc->port.tty = tty;
2887
2888 if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
2889 tty->winsize.ws_row = vc_cons[currcons].d->vc_rows;
2890 tty->winsize.ws_col = vc_cons[currcons].d->vc_cols;
2891 }
2892 if (vc->vc_utf)
2893 tty->termios.c_iflag |= IUTF8;
2894 else
2895 tty->termios.c_iflag &= ~IUTF8;
2896 unlock:
2897 console_unlock();
2898 return ret;
2899 }
2900
2901 static int con_open(struct tty_struct *tty, struct file *filp)
2902 {
2903 /* everything done in install */
2904 return 0;
2905 }
2906
2907
2908 static void con_close(struct tty_struct *tty, struct file *filp)
2909 {
2910 /* Nothing to do - we defer to shutdown */
2911 }
2912
2913 static void con_shutdown(struct tty_struct *tty)
2914 {
2915 struct vc_data *vc = tty->driver_data;
2916 BUG_ON(vc == NULL);
2917 console_lock();
2918 vc->port.tty = NULL;
2919 console_unlock();
2920 }
2921
2922 static int default_color = 7; /* white */
2923 static int default_italic_color = 2; // green (ASCII)
2924 static int default_underline_color = 3; // cyan (ASCII)
2925 module_param_named(color, default_color, int, S_IRUGO | S_IWUSR);
2926 module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR);
2927 module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR);
2928
2929 static void vc_init(struct vc_data *vc, unsigned int rows,
2930 unsigned int cols, int do_clear)
2931 {
2932 int j, k ;
2933
2934 vc->vc_cols = cols;
2935 vc->vc_rows = rows;
2936 vc->vc_size_row = cols << 1;
2937 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
2938
2939 set_origin(vc);
2940 vc->vc_pos = vc->vc_origin;
2941 reset_vc(vc);
2942 for (j=k=0; j<16; j++) {
2943 vc->vc_palette[k++] = default_red[j] ;
2944 vc->vc_palette[k++] = default_grn[j] ;
2945 vc->vc_palette[k++] = default_blu[j] ;
2946 }
2947 vc->vc_def_color = default_color;
2948 vc->vc_ulcolor = default_underline_color;
2949 vc->vc_itcolor = default_italic_color;
2950 vc->vc_halfcolor = 0x08; /* grey */
2951 init_waitqueue_head(&vc->paste_wait);
2952 reset_terminal(vc, do_clear);
2953 }
2954
2955 /*
2956 * This routine initializes console interrupts, and does nothing
2957 * else. If you want the screen to clear, call tty_write with
2958 * the appropriate escape-sequence.
2959 */
2960
2961 static int __init con_init(void)
2962 {
2963 const char *display_desc = NULL;
2964 struct vc_data *vc;
2965 unsigned int currcons = 0, i;
2966
2967 console_lock();
2968
2969 if (conswitchp)
2970 display_desc = conswitchp->con_startup();
2971 if (!display_desc) {
2972 fg_console = 0;
2973 console_unlock();
2974 return 0;
2975 }
2976
2977 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2978 struct con_driver *con_driver = &registered_con_driver[i];
2979
2980 if (con_driver->con == NULL) {
2981 con_driver->con = conswitchp;
2982 con_driver->desc = display_desc;
2983 con_driver->flag = CON_DRIVER_FLAG_INIT;
2984 con_driver->first = 0;
2985 con_driver->last = MAX_NR_CONSOLES - 1;
2986 break;
2987 }
2988 }
2989
2990 for (i = 0; i < MAX_NR_CONSOLES; i++)
2991 con_driver_map[i] = conswitchp;
2992
2993 if (blankinterval) {
2994 blank_state = blank_normal_wait;
2995 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
2996 }
2997
2998 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) {
2999 vc_cons[currcons].d = vc = kzalloc(sizeof(struct vc_data), GFP_NOWAIT);
3000 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
3001 tty_port_init(&vc->port);
3002 visual_init(vc, currcons, 1);
3003 vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_NOWAIT);
3004 vc_init(vc, vc->vc_rows, vc->vc_cols,
3005 currcons || !vc->vc_sw->con_save_screen);
3006 }
3007 currcons = fg_console = 0;
3008 master_display_fg = vc = vc_cons[currcons].d;
3009 set_origin(vc);
3010 save_screen(vc);
3011 gotoxy(vc, vc->vc_x, vc->vc_y);
3012 csi_J(vc, 0);
3013 update_screen(vc);
3014 pr_info("Console: %s %s %dx%d\n",
3015 vc->vc_can_do_color ? "colour" : "mono",
3016 display_desc, vc->vc_cols, vc->vc_rows);
3017 printable = 1;
3018
3019 console_unlock();
3020
3021 #ifdef CONFIG_VT_CONSOLE
3022 register_console(&vt_console_driver);
3023 #endif
3024 return 0;
3025 }
3026 console_initcall(con_init);
3027
3028 static const struct tty_operations con_ops = {
3029 .install = con_install,
3030 .open = con_open,
3031 .close = con_close,
3032 .write = con_write,
3033 .write_room = con_write_room,
3034 .put_char = con_put_char,
3035 .flush_chars = con_flush_chars,
3036 .chars_in_buffer = con_chars_in_buffer,
3037 .ioctl = vt_ioctl,
3038 #ifdef CONFIG_COMPAT
3039 .compat_ioctl = vt_compat_ioctl,
3040 #endif
3041 .stop = con_stop,
3042 .start = con_start,
3043 .throttle = con_throttle,
3044 .unthrottle = con_unthrottle,
3045 .resize = vt_resize,
3046 .shutdown = con_shutdown
3047 };
3048
3049 static struct cdev vc0_cdev;
3050
3051 static ssize_t show_tty_active(struct device *dev,
3052 struct device_attribute *attr, char *buf)
3053 {
3054 return sprintf(buf, "tty%d\n", fg_console + 1);
3055 }
3056 static DEVICE_ATTR(active, S_IRUGO, show_tty_active, NULL);
3057
3058 static struct attribute *vt_dev_attrs[] = {
3059 &dev_attr_active.attr,
3060 NULL
3061 };
3062
3063 ATTRIBUTE_GROUPS(vt_dev);
3064
3065 int __init vty_init(const struct file_operations *console_fops)
3066 {
3067 cdev_init(&vc0_cdev, console_fops);
3068 if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) ||
3069 register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0)
3070 panic("Couldn't register /dev/tty0 driver\n");
3071 tty0dev = device_create_with_groups(tty_class, NULL,
3072 MKDEV(TTY_MAJOR, 0), NULL,
3073 vt_dev_groups, "tty0");
3074 if (IS_ERR(tty0dev))
3075 tty0dev = NULL;
3076
3077 vcs_init();
3078
3079 console_driver = alloc_tty_driver(MAX_NR_CONSOLES);
3080 if (!console_driver)
3081 panic("Couldn't allocate console driver\n");
3082
3083 console_driver->name = "tty";
3084 console_driver->name_base = 1;
3085 console_driver->major = TTY_MAJOR;
3086 console_driver->minor_start = 1;
3087 console_driver->type = TTY_DRIVER_TYPE_CONSOLE;
3088 console_driver->init_termios = tty_std_termios;
3089 if (default_utf8)
3090 console_driver->init_termios.c_iflag |= IUTF8;
3091 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS;
3092 tty_set_operations(console_driver, &con_ops);
3093 if (tty_register_driver(console_driver))
3094 panic("Couldn't register console driver\n");
3095 kbd_init();
3096 console_map_init();
3097 #ifdef CONFIG_MDA_CONSOLE
3098 mda_console_init();
3099 #endif
3100 return 0;
3101 }
3102
3103 #ifndef VT_SINGLE_DRIVER
3104
3105 static struct class *vtconsole_class;
3106
3107 static int do_bind_con_driver(const struct consw *csw, int first, int last,
3108 int deflt)
3109 {
3110 struct module *owner = csw->owner;
3111 const char *desc = NULL;
3112 struct con_driver *con_driver;
3113 int i, j = -1, k = -1, retval = -ENODEV;
3114
3115 if (!try_module_get(owner))
3116 return -ENODEV;
3117
3118 WARN_CONSOLE_UNLOCKED();
3119
3120 /* check if driver is registered */
3121 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3122 con_driver = &registered_con_driver[i];
3123
3124 if (con_driver->con == csw) {
3125 desc = con_driver->desc;
3126 retval = 0;
3127 break;
3128 }
3129 }
3130
3131 if (retval)
3132 goto err;
3133
3134 if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) {
3135 csw->con_startup();
3136 con_driver->flag |= CON_DRIVER_FLAG_INIT;
3137 }
3138
3139 if (deflt) {
3140 if (conswitchp)
3141 module_put(conswitchp->owner);
3142
3143 __module_get(owner);
3144 conswitchp = csw;
3145 }
3146
3147 first = max(first, con_driver->first);
3148 last = min(last, con_driver->last);
3149
3150 for (i = first; i <= last; i++) {
3151 int old_was_color;
3152 struct vc_data *vc = vc_cons[i].d;
3153
3154 if (con_driver_map[i])
3155 module_put(con_driver_map[i]->owner);
3156 __module_get(owner);
3157 con_driver_map[i] = csw;
3158
3159 if (!vc || !vc->vc_sw)
3160 continue;
3161
3162 j = i;
3163
3164 if (CON_IS_VISIBLE(vc)) {
3165 k = i;
3166 save_screen(vc);
3167 }
3168
3169 old_was_color = vc->vc_can_do_color;
3170 vc->vc_sw->con_deinit(vc);
3171 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
3172 visual_init(vc, i, 0);
3173 set_origin(vc);
3174 update_attr(vc);
3175
3176 /* If the console changed between mono <-> color, then
3177 * the attributes in the screenbuf will be wrong. The
3178 * following resets all attributes to something sane.
3179 */
3180 if (old_was_color != vc->vc_can_do_color)
3181 clear_buffer_attributes(vc);
3182 }
3183
3184 pr_info("Console: switching ");
3185 if (!deflt)
3186 printk("consoles %d-%d ", first+1, last+1);
3187 if (j >= 0) {
3188 struct vc_data *vc = vc_cons[j].d;
3189
3190 printk("to %s %s %dx%d\n",
3191 vc->vc_can_do_color ? "colour" : "mono",
3192 desc, vc->vc_cols, vc->vc_rows);
3193
3194 if (k >= 0) {
3195 vc = vc_cons[k].d;
3196 update_screen(vc);
3197 }
3198 } else
3199 printk("to %s\n", desc);
3200
3201 retval = 0;
3202 err:
3203 module_put(owner);
3204 return retval;
3205 };
3206
3207
3208 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
3209 /* unlocked version of unbind_con_driver() */
3210 int do_unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
3211 {
3212 struct module *owner = csw->owner;
3213 const struct consw *defcsw = NULL;
3214 struct con_driver *con_driver = NULL, *con_back = NULL;
3215 int i, retval = -ENODEV;
3216
3217 if (!try_module_get(owner))
3218 return -ENODEV;
3219
3220 WARN_CONSOLE_UNLOCKED();
3221
3222 /* check if driver is registered and if it is unbindable */
3223 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3224 con_driver = &registered_con_driver[i];
3225
3226 if (con_driver->con == csw &&
3227 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3228 retval = 0;
3229 break;
3230 }
3231 }
3232
3233 if (retval)
3234 goto err;
3235
3236 retval = -ENODEV;
3237
3238 /* check if backup driver exists */
3239 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3240 con_back = &registered_con_driver[i];
3241
3242 if (con_back->con && con_back->con != csw) {
3243 defcsw = con_back->con;
3244 retval = 0;
3245 break;
3246 }
3247 }
3248
3249 if (retval)
3250 goto err;
3251
3252 if (!con_is_bound(csw))
3253 goto err;
3254
3255 first = max(first, con_driver->first);
3256 last = min(last, con_driver->last);
3257
3258 for (i = first; i <= last; i++) {
3259 if (con_driver_map[i] == csw) {
3260 module_put(csw->owner);
3261 con_driver_map[i] = NULL;
3262 }
3263 }
3264
3265 if (!con_is_bound(defcsw)) {
3266 const struct consw *defconsw = conswitchp;
3267
3268 defcsw->con_startup();
3269 con_back->flag |= CON_DRIVER_FLAG_INIT;
3270 /*
3271 * vgacon may change the default driver to point
3272 * to dummycon, we restore it here...
3273 */
3274 conswitchp = defconsw;
3275 }
3276
3277 if (!con_is_bound(csw))
3278 con_driver->flag &= ~CON_DRIVER_FLAG_INIT;
3279
3280 /* ignore return value, binding should not fail */
3281 do_bind_con_driver(defcsw, first, last, deflt);
3282 err:
3283 module_put(owner);
3284 return retval;
3285
3286 }
3287 EXPORT_SYMBOL_GPL(do_unbind_con_driver);
3288
3289 static int vt_bind(struct con_driver *con)
3290 {
3291 const struct consw *defcsw = NULL, *csw = NULL;
3292 int i, more = 1, first = -1, last = -1, deflt = 0;
3293
3294 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE))
3295 goto err;
3296
3297 csw = con->con;
3298
3299 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3300 struct con_driver *con = &registered_con_driver[i];
3301
3302 if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) {
3303 defcsw = con->con;
3304 break;
3305 }
3306 }
3307
3308 if (!defcsw)
3309 goto err;
3310
3311 while (more) {
3312 more = 0;
3313
3314 for (i = con->first; i <= con->last; i++) {
3315 if (con_driver_map[i] == defcsw) {
3316 if (first == -1)
3317 first = i;
3318 last = i;
3319 more = 1;
3320 } else if (first != -1)
3321 break;
3322 }
3323
3324 if (first == 0 && last == MAX_NR_CONSOLES -1)
3325 deflt = 1;
3326
3327 if (first != -1)
3328 do_bind_con_driver(csw, first, last, deflt);
3329
3330 first = -1;
3331 last = -1;
3332 deflt = 0;
3333 }
3334
3335 err:
3336 return 0;
3337 }
3338
3339 static int vt_unbind(struct con_driver *con)
3340 {
3341 const struct consw *csw = NULL;
3342 int i, more = 1, first = -1, last = -1, deflt = 0;
3343 int ret;
3344
3345 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE))
3346 goto err;
3347
3348 csw = con->con;
3349
3350 while (more) {
3351 more = 0;
3352
3353 for (i = con->first; i <= con->last; i++) {
3354 if (con_driver_map[i] == csw) {
3355 if (first == -1)
3356 first = i;
3357 last = i;
3358 more = 1;
3359 } else if (first != -1)
3360 break;
3361 }
3362
3363 if (first == 0 && last == MAX_NR_CONSOLES -1)
3364 deflt = 1;
3365
3366 if (first != -1) {
3367 ret = do_unbind_con_driver(csw, first, last, deflt);
3368 if (ret != 0)
3369 return ret;
3370 }
3371
3372 first = -1;
3373 last = -1;
3374 deflt = 0;
3375 }
3376
3377 err:
3378 return 0;
3379 }
3380 #else
3381 static inline int vt_bind(struct con_driver *con)
3382 {
3383 return 0;
3384 }
3385 static inline int vt_unbind(struct con_driver *con)
3386 {
3387 return 0;
3388 }
3389 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3390
3391 static ssize_t store_bind(struct device *dev, struct device_attribute *attr,
3392 const char *buf, size_t count)
3393 {
3394 struct con_driver *con = dev_get_drvdata(dev);
3395 int bind = simple_strtoul(buf, NULL, 0);
3396
3397 console_lock();
3398
3399 if (bind)
3400 vt_bind(con);
3401 else
3402 vt_unbind(con);
3403
3404 console_unlock();
3405
3406 return count;
3407 }
3408
3409 static ssize_t show_bind(struct device *dev, struct device_attribute *attr,
3410 char *buf)
3411 {
3412 struct con_driver *con = dev_get_drvdata(dev);
3413 int bind = con_is_bound(con->con);
3414
3415 return snprintf(buf, PAGE_SIZE, "%i\n", bind);
3416 }
3417
3418 static ssize_t show_name(struct device *dev, struct device_attribute *attr,
3419 char *buf)
3420 {
3421 struct con_driver *con = dev_get_drvdata(dev);
3422
3423 return snprintf(buf, PAGE_SIZE, "%s %s\n",
3424 (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)",
3425 con->desc);
3426
3427 }
3428
3429 static DEVICE_ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind);
3430 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
3431
3432 static struct attribute *con_dev_attrs[] = {
3433 &dev_attr_bind.attr,
3434 &dev_attr_name.attr,
3435 NULL
3436 };
3437
3438 ATTRIBUTE_GROUPS(con_dev);
3439
3440 static int vtconsole_init_device(struct con_driver *con)
3441 {
3442 con->flag |= CON_DRIVER_FLAG_ATTR;
3443 return 0;
3444 }
3445
3446 static void vtconsole_deinit_device(struct con_driver *con)
3447 {
3448 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3449 }
3450
3451 /**
3452 * con_is_bound - checks if driver is bound to the console
3453 * @csw: console driver
3454 *
3455 * RETURNS: zero if unbound, nonzero if bound
3456 *
3457 * Drivers can call this and if zero, they should release
3458 * all resources allocated on con_startup()
3459 */
3460 int con_is_bound(const struct consw *csw)
3461 {
3462 int i, bound = 0;
3463
3464 for (i = 0; i < MAX_NR_CONSOLES; i++) {
3465 if (con_driver_map[i] == csw) {
3466 bound = 1;
3467 break;
3468 }
3469 }
3470
3471 return bound;
3472 }
3473 EXPORT_SYMBOL(con_is_bound);
3474
3475 /**
3476 * con_debug_enter - prepare the console for the kernel debugger
3477 * @sw: console driver
3478 *
3479 * Called when the console is taken over by the kernel debugger, this
3480 * function needs to save the current console state, then put the console
3481 * into a state suitable for the kernel debugger.
3482 *
3483 * RETURNS:
3484 * Zero on success, nonzero if a failure occurred when trying to prepare
3485 * the console for the debugger.
3486 */
3487 int con_debug_enter(struct vc_data *vc)
3488 {
3489 int ret = 0;
3490
3491 saved_fg_console = fg_console;
3492 saved_last_console = last_console;
3493 saved_want_console = want_console;
3494 saved_vc_mode = vc->vc_mode;
3495 saved_console_blanked = console_blanked;
3496 vc->vc_mode = KD_TEXT;
3497 console_blanked = 0;
3498 if (vc->vc_sw->con_debug_enter)
3499 ret = vc->vc_sw->con_debug_enter(vc);
3500 #ifdef CONFIG_KGDB_KDB
3501 /* Set the initial LINES variable if it is not already set */
3502 if (vc->vc_rows < 999) {
3503 int linecount;
3504 char lns[4];
3505 const char *setargs[3] = {
3506 "set",
3507 "LINES",
3508 lns,
3509 };
3510 if (kdbgetintenv(setargs[0], &linecount)) {
3511 snprintf(lns, 4, "%i", vc->vc_rows);
3512 kdb_set(2, setargs);
3513 }
3514 }
3515 if (vc->vc_cols < 999) {
3516 int colcount;
3517 char cols[4];
3518 const char *setargs[3] = {
3519 "set",
3520 "COLUMNS",
3521 cols,
3522 };
3523 if (kdbgetintenv(setargs[0], &colcount)) {
3524 snprintf(cols, 4, "%i", vc->vc_cols);
3525 kdb_set(2, setargs);
3526 }
3527 }
3528 #endif /* CONFIG_KGDB_KDB */
3529 return ret;
3530 }
3531 EXPORT_SYMBOL_GPL(con_debug_enter);
3532
3533 /**
3534 * con_debug_leave - restore console state
3535 * @sw: console driver
3536 *
3537 * Restore the console state to what it was before the kernel debugger
3538 * was invoked.
3539 *
3540 * RETURNS:
3541 * Zero on success, nonzero if a failure occurred when trying to restore
3542 * the console.
3543 */
3544 int con_debug_leave(void)
3545 {
3546 struct vc_data *vc;
3547 int ret = 0;
3548
3549 fg_console = saved_fg_console;
3550 last_console = saved_last_console;
3551 want_console = saved_want_console;
3552 console_blanked = saved_console_blanked;
3553 vc_cons[fg_console].d->vc_mode = saved_vc_mode;
3554
3555 vc = vc_cons[fg_console].d;
3556 if (vc->vc_sw->con_debug_leave)
3557 ret = vc->vc_sw->con_debug_leave(vc);
3558 return ret;
3559 }
3560 EXPORT_SYMBOL_GPL(con_debug_leave);
3561
3562 static int do_register_con_driver(const struct consw *csw, int first, int last)
3563 {
3564 struct module *owner = csw->owner;
3565 struct con_driver *con_driver;
3566 const char *desc;
3567 int i, retval = 0;
3568
3569 WARN_CONSOLE_UNLOCKED();
3570
3571 if (!try_module_get(owner))
3572 return -ENODEV;
3573
3574 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3575 con_driver = &registered_con_driver[i];
3576
3577 /* already registered */
3578 if (con_driver->con == csw)
3579 retval = -EBUSY;
3580 }
3581
3582 if (retval)
3583 goto err;
3584
3585 desc = csw->con_startup();
3586
3587 if (!desc)
3588 goto err;
3589
3590 retval = -EINVAL;
3591
3592 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3593 con_driver = &registered_con_driver[i];
3594
3595 if (con_driver->con == NULL &&
3596 !(con_driver->flag & CON_DRIVER_FLAG_ZOMBIE)) {
3597 con_driver->con = csw;
3598 con_driver->desc = desc;
3599 con_driver->node = i;
3600 con_driver->flag = CON_DRIVER_FLAG_MODULE |
3601 CON_DRIVER_FLAG_INIT;
3602 con_driver->first = first;
3603 con_driver->last = last;
3604 retval = 0;
3605 break;
3606 }
3607 }
3608
3609 if (retval)
3610 goto err;
3611
3612 con_driver->dev =
3613 device_create_with_groups(vtconsole_class, NULL,
3614 MKDEV(0, con_driver->node),
3615 con_driver, con_dev_groups,
3616 "vtcon%i", con_driver->node);
3617 if (IS_ERR(con_driver->dev)) {
3618 printk(KERN_WARNING "Unable to create device for %s; "
3619 "errno = %ld\n", con_driver->desc,
3620 PTR_ERR(con_driver->dev));
3621 con_driver->dev = NULL;
3622 } else {
3623 vtconsole_init_device(con_driver);
3624 }
3625
3626 err:
3627 module_put(owner);
3628 return retval;
3629 }
3630
3631
3632 /**
3633 * do_unregister_con_driver - unregister console driver from console layer
3634 * @csw: console driver
3635 *
3636 * DESCRIPTION: All drivers that registers to the console layer must
3637 * call this function upon exit, or if the console driver is in a state
3638 * where it won't be able to handle console services, such as the
3639 * framebuffer console without loaded framebuffer drivers.
3640 *
3641 * The driver must unbind first prior to unregistration.
3642 */
3643 int do_unregister_con_driver(const struct consw *csw)
3644 {
3645 int i;
3646
3647 /* cannot unregister a bound driver */
3648 if (con_is_bound(csw))
3649 return -EBUSY;
3650
3651 if (csw == conswitchp)
3652 return -EINVAL;
3653
3654 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3655 struct con_driver *con_driver = &registered_con_driver[i];
3656
3657 if (con_driver->con == csw) {
3658 /*
3659 * Defer the removal of the sysfs entries since that
3660 * will acquire the kernfs s_active lock and we can't
3661 * acquire this lock while holding the console lock:
3662 * the unbind sysfs entry imposes already the opposite
3663 * order. Reset con already here to prevent any later
3664 * lookup to succeed and mark this slot as zombie, so
3665 * it won't get reused until we complete the removal
3666 * in the deferred work.
3667 */
3668 con_driver->con = NULL;
3669 con_driver->flag = CON_DRIVER_FLAG_ZOMBIE;
3670 schedule_work(&con_driver_unregister_work);
3671
3672 return 0;
3673 }
3674 }
3675
3676 return -ENODEV;
3677 }
3678 EXPORT_SYMBOL_GPL(do_unregister_con_driver);
3679
3680 static void con_driver_unregister_callback(struct work_struct *ignored)
3681 {
3682 int i;
3683
3684 console_lock();
3685
3686 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3687 struct con_driver *con_driver = &registered_con_driver[i];
3688
3689 if (!(con_driver->flag & CON_DRIVER_FLAG_ZOMBIE))
3690 continue;
3691
3692 console_unlock();
3693
3694 vtconsole_deinit_device(con_driver);
3695 device_destroy(vtconsole_class, MKDEV(0, con_driver->node));
3696
3697 console_lock();
3698
3699 if (WARN_ON_ONCE(con_driver->con))
3700 con_driver->con = NULL;
3701 con_driver->desc = NULL;
3702 con_driver->dev = NULL;
3703 con_driver->node = 0;
3704 WARN_ON_ONCE(con_driver->flag != CON_DRIVER_FLAG_ZOMBIE);
3705 con_driver->flag = 0;
3706 con_driver->first = 0;
3707 con_driver->last = 0;
3708 }
3709
3710 console_unlock();
3711 }
3712
3713 /*
3714 * If we support more console drivers, this function is used
3715 * when a driver wants to take over some existing consoles
3716 * and become default driver for newly opened ones.
3717 *
3718 * do_take_over_console is basically a register followed by unbind
3719 */
3720 int do_take_over_console(const struct consw *csw, int first, int last, int deflt)
3721 {
3722 int err;
3723
3724 err = do_register_con_driver(csw, first, last);
3725 /*
3726 * If we get an busy error we still want to bind the console driver
3727 * and return success, as we may have unbound the console driver
3728 * but not unregistered it.
3729 */
3730 if (err == -EBUSY)
3731 err = 0;
3732 if (!err)
3733 do_bind_con_driver(csw, first, last, deflt);
3734
3735 return err;
3736 }
3737 EXPORT_SYMBOL_GPL(do_take_over_console);
3738
3739
3740 /*
3741 * give_up_console is a wrapper to unregister_con_driver. It will only
3742 * work if driver is fully unbound.
3743 */
3744 void give_up_console(const struct consw *csw)
3745 {
3746 console_lock();
3747 do_unregister_con_driver(csw);
3748 console_unlock();
3749 }
3750
3751 static int __init vtconsole_class_init(void)
3752 {
3753 int i;
3754
3755 vtconsole_class = class_create(THIS_MODULE, "vtconsole");
3756 if (IS_ERR(vtconsole_class)) {
3757 printk(KERN_WARNING "Unable to create vt console class; "
3758 "errno = %ld\n", PTR_ERR(vtconsole_class));
3759 vtconsole_class = NULL;
3760 }
3761
3762 /* Add system drivers to sysfs */
3763 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3764 struct con_driver *con = &registered_con_driver[i];
3765
3766 if (con->con && !con->dev) {
3767 con->dev =
3768 device_create_with_groups(vtconsole_class, NULL,
3769 MKDEV(0, con->node),
3770 con, con_dev_groups,
3771 "vtcon%i", con->node);
3772
3773 if (IS_ERR(con->dev)) {
3774 printk(KERN_WARNING "Unable to create "
3775 "device for %s; errno = %ld\n",
3776 con->desc, PTR_ERR(con->dev));
3777 con->dev = NULL;
3778 } else {
3779 vtconsole_init_device(con);
3780 }
3781 }
3782 }
3783
3784 return 0;
3785 }
3786 postcore_initcall(vtconsole_class_init);
3787
3788 #endif
3789
3790 /*
3791 * Screen blanking
3792 */
3793
3794 static int set_vesa_blanking(char __user *p)
3795 {
3796 unsigned int mode;
3797
3798 if (get_user(mode, p + 1))
3799 return -EFAULT;
3800
3801 vesa_blank_mode = (mode < 4) ? mode : 0;
3802 return 0;
3803 }
3804
3805 void do_blank_screen(int entering_gfx)
3806 {
3807 struct vc_data *vc = vc_cons[fg_console].d;
3808 int i;
3809
3810 WARN_CONSOLE_UNLOCKED();
3811
3812 if (console_blanked) {
3813 if (blank_state == blank_vesa_wait) {
3814 blank_state = blank_off;
3815 vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0);
3816 }
3817 return;
3818 }
3819
3820 /* entering graphics mode? */
3821 if (entering_gfx) {
3822 hide_cursor(vc);
3823 save_screen(vc);
3824 vc->vc_sw->con_blank(vc, -1, 1);
3825 console_blanked = fg_console + 1;
3826 blank_state = blank_off;
3827 set_origin(vc);
3828 return;
3829 }
3830
3831 if (blank_state != blank_normal_wait)
3832 return;
3833 blank_state = blank_off;
3834
3835 /* don't blank graphics */
3836 if (vc->vc_mode != KD_TEXT) {
3837 console_blanked = fg_console + 1;
3838 return;
3839 }
3840
3841 hide_cursor(vc);
3842 del_timer_sync(&console_timer);
3843 blank_timer_expired = 0;
3844
3845 save_screen(vc);
3846 /* In case we need to reset origin, blanking hook returns 1 */
3847 i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0);
3848 console_blanked = fg_console + 1;
3849 if (i)
3850 set_origin(vc);
3851
3852 if (console_blank_hook && console_blank_hook(1))
3853 return;
3854
3855 if (vesa_off_interval && vesa_blank_mode) {
3856 blank_state = blank_vesa_wait;
3857 mod_timer(&console_timer, jiffies + vesa_off_interval);
3858 }
3859 vt_event_post(VT_EVENT_BLANK, vc->vc_num, vc->vc_num);
3860 }
3861 EXPORT_SYMBOL(do_blank_screen);
3862
3863 /*
3864 * Called by timer as well as from vt_console_driver
3865 */
3866 void do_unblank_screen(int leaving_gfx)
3867 {
3868 struct vc_data *vc;
3869
3870 /* This should now always be called from a "sane" (read: can schedule)
3871 * context for the sake of the low level drivers, except in the special
3872 * case of oops_in_progress
3873 */
3874 if (!oops_in_progress)
3875 might_sleep();
3876
3877 WARN_CONSOLE_UNLOCKED();
3878
3879 ignore_poke = 0;
3880 if (!console_blanked)
3881 return;
3882 if (!vc_cons_allocated(fg_console)) {
3883 /* impossible */
3884 pr_warn("unblank_screen: tty %d not allocated ??\n",
3885 fg_console + 1);
3886 return;
3887 }
3888 vc = vc_cons[fg_console].d;
3889 /* Try to unblank in oops case too */
3890 if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc))
3891 return; /* but leave console_blanked != 0 */
3892
3893 if (blankinterval) {
3894 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
3895 blank_state = blank_normal_wait;
3896 }
3897
3898 console_blanked = 0;
3899 if (vc->vc_sw->con_blank(vc, 0, leaving_gfx) || vt_force_oops_output(vc))
3900 /* Low-level driver cannot restore -> do it ourselves */
3901 update_screen(vc);
3902 if (console_blank_hook)
3903 console_blank_hook(0);
3904 set_palette(vc);
3905 set_cursor(vc);
3906 vt_event_post(VT_EVENT_UNBLANK, vc->vc_num, vc->vc_num);
3907 }
3908 EXPORT_SYMBOL(do_unblank_screen);
3909
3910 /*
3911 * This is called by the outside world to cause a forced unblank, mostly for
3912 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
3913 * call it with 1 as an argument and so force a mode restore... that may kill
3914 * X or at least garbage the screen but would also make the Oops visible...
3915 */
3916 void unblank_screen(void)
3917 {
3918 do_unblank_screen(0);
3919 }
3920
3921 /*
3922 * We defer the timer blanking to work queue so it can take the console mutex
3923 * (console operations can still happen at irq time, but only from printk which
3924 * has the console mutex. Not perfect yet, but better than no locking
3925 */
3926 static void blank_screen_t(unsigned long dummy)
3927 {
3928 if (unlikely(!keventd_up())) {
3929 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
3930 return;
3931 }
3932 blank_timer_expired = 1;
3933 schedule_work(&console_work);
3934 }
3935
3936 void poke_blanked_console(void)
3937 {
3938 WARN_CONSOLE_UNLOCKED();
3939
3940 /* Add this so we quickly catch whoever might call us in a non
3941 * safe context. Nowadays, unblank_screen() isn't to be called in
3942 * atomic contexts and is allowed to schedule (with the special case
3943 * of oops_in_progress, but that isn't of any concern for this
3944 * function. --BenH.
3945 */
3946 might_sleep();
3947
3948 /* This isn't perfectly race free, but a race here would be mostly harmless,
3949 * at worse, we'll do a spurrious blank and it's unlikely
3950 */
3951 del_timer(&console_timer);
3952 blank_timer_expired = 0;
3953
3954 if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS)
3955 return;
3956 if (console_blanked)
3957 unblank_screen();
3958 else if (blankinterval) {
3959 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
3960 blank_state = blank_normal_wait;
3961 }
3962 }
3963
3964 /*
3965 * Palettes
3966 */
3967
3968 static void set_palette(struct vc_data *vc)
3969 {
3970 WARN_CONSOLE_UNLOCKED();
3971
3972 if (vc->vc_mode != KD_GRAPHICS)
3973 vc->vc_sw->con_set_palette(vc, color_table);
3974 }
3975
3976 /*
3977 * Load palette into the DAC registers. arg points to a colour
3978 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
3979 */
3980
3981 int con_set_cmap(unsigned char __user *arg)
3982 {
3983 int i, j, k;
3984 unsigned char colormap[3*16];
3985
3986 if (copy_from_user(colormap, arg, sizeof(colormap)))
3987 return -EFAULT;
3988
3989 console_lock();
3990 for (i = k = 0; i < 16; i++) {
3991 default_red[i] = colormap[k++];
3992 default_grn[i] = colormap[k++];
3993 default_blu[i] = colormap[k++];
3994 }
3995 for (i = 0; i < MAX_NR_CONSOLES; i++) {
3996 if (!vc_cons_allocated(i))
3997 continue;
3998 for (j = k = 0; j < 16; j++) {
3999 vc_cons[i].d->vc_palette[k++] = default_red[j];
4000 vc_cons[i].d->vc_palette[k++] = default_grn[j];
4001 vc_cons[i].d->vc_palette[k++] = default_blu[j];
4002 }
4003 set_palette(vc_cons[i].d);
4004 }
4005 console_unlock();
4006
4007 return 0;
4008 }
4009
4010 int con_get_cmap(unsigned char __user *arg)
4011 {
4012 int i, k;
4013 unsigned char colormap[3*16];
4014
4015 console_lock();
4016 for (i = k = 0; i < 16; i++) {
4017 colormap[k++] = default_red[i];
4018 colormap[k++] = default_grn[i];
4019 colormap[k++] = default_blu[i];
4020 }
4021 console_unlock();
4022
4023 if (copy_to_user(arg, colormap, sizeof(colormap)))
4024 return -EFAULT;
4025
4026 return 0;
4027 }
4028
4029 void reset_palette(struct vc_data *vc)
4030 {
4031 int j, k;
4032 for (j=k=0; j<16; j++) {
4033 vc->vc_palette[k++] = default_red[j];
4034 vc->vc_palette[k++] = default_grn[j];
4035 vc->vc_palette[k++] = default_blu[j];
4036 }
4037 set_palette(vc);
4038 }
4039
4040 /*
4041 * Font switching
4042 *
4043 * Currently we only support fonts up to 32 pixels wide, at a maximum height
4044 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
4045 * depending on width) reserved for each character which is kinda wasty, but
4046 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
4047 * is up to the actual low-level console-driver convert data into its favorite
4048 * format (maybe we should add a `fontoffset' field to the `display'
4049 * structure so we won't have to convert the fontdata all the time.
4050 * /Jes
4051 */
4052
4053 #define max_font_size 65536
4054
4055 static int con_font_get(struct vc_data *vc, struct console_font_op *op)
4056 {
4057 struct console_font font;
4058 int rc = -EINVAL;
4059 int c;
4060
4061 if (op->data) {
4062 font.data = kmalloc(max_font_size, GFP_KERNEL);
4063 if (!font.data)
4064 return -ENOMEM;
4065 } else
4066 font.data = NULL;
4067
4068 console_lock();
4069 if (vc->vc_mode != KD_TEXT)
4070 rc = -EINVAL;
4071 else if (vc->vc_sw->con_font_get)
4072 rc = vc->vc_sw->con_font_get(vc, &font);
4073 else
4074 rc = -ENOSYS;
4075 console_unlock();
4076
4077 if (rc)
4078 goto out;
4079
4080 c = (font.width+7)/8 * 32 * font.charcount;
4081
4082 if (op->data && font.charcount > op->charcount)
4083 rc = -ENOSPC;
4084 if (!(op->flags & KD_FONT_FLAG_OLD)) {
4085 if (font.width > op->width || font.height > op->height)
4086 rc = -ENOSPC;
4087 } else {
4088 if (font.width != 8)
4089 rc = -EIO;
4090 else if ((op->height && font.height > op->height) ||
4091 font.height > 32)
4092 rc = -ENOSPC;
4093 }
4094 if (rc)
4095 goto out;
4096
4097 op->height = font.height;
4098 op->width = font.width;
4099 op->charcount = font.charcount;
4100
4101 if (op->data && copy_to_user(op->data, font.data, c))
4102 rc = -EFAULT;
4103
4104 out:
4105 kfree(font.data);
4106 return rc;
4107 }
4108
4109 static int con_font_set(struct vc_data *vc, struct console_font_op *op)
4110 {
4111 struct console_font font;
4112 int rc = -EINVAL;
4113 int size;
4114
4115 if (vc->vc_mode != KD_TEXT)
4116 return -EINVAL;
4117 if (!op->data)
4118 return -EINVAL;
4119 if (op->charcount > 512)
4120 return -EINVAL;
4121 if (!op->height) { /* Need to guess font height [compat] */
4122 int h, i;
4123 u8 __user *charmap = op->data;
4124 u8 tmp;
4125
4126 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
4127 so that we can get rid of this soon */
4128 if (!(op->flags & KD_FONT_FLAG_OLD))
4129 return -EINVAL;
4130 for (h = 32; h > 0; h--)
4131 for (i = 0; i < op->charcount; i++) {
4132 if (get_user(tmp, &charmap[32*i+h-1]))
4133 return -EFAULT;
4134 if (tmp)
4135 goto nonzero;
4136 }
4137 return -EINVAL;
4138 nonzero:
4139 op->height = h;
4140 }
4141 if (op->width <= 0 || op->width > 32 || op->height > 32)
4142 return -EINVAL;
4143 size = (op->width+7)/8 * 32 * op->charcount;
4144 if (size > max_font_size)
4145 return -ENOSPC;
4146 font.charcount = op->charcount;
4147 font.height = op->height;
4148 font.width = op->width;
4149 font.data = memdup_user(op->data, size);
4150 if (IS_ERR(font.data))
4151 return PTR_ERR(font.data);
4152 console_lock();
4153 if (vc->vc_mode != KD_TEXT)
4154 rc = -EINVAL;
4155 else if (vc->vc_sw->con_font_set)
4156 rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
4157 else
4158 rc = -ENOSYS;
4159 console_unlock();
4160 kfree(font.data);
4161 return rc;
4162 }
4163
4164 static int con_font_default(struct vc_data *vc, struct console_font_op *op)
4165 {
4166 struct console_font font = {.width = op->width, .height = op->height};
4167 char name[MAX_FONT_NAME];
4168 char *s = name;
4169 int rc;
4170
4171
4172 if (!op->data)
4173 s = NULL;
4174 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0)
4175 return -EFAULT;
4176 else
4177 name[MAX_FONT_NAME - 1] = 0;
4178
4179 console_lock();
4180 if (vc->vc_mode != KD_TEXT) {
4181 console_unlock();
4182 return -EINVAL;
4183 }
4184 if (vc->vc_sw->con_font_default)
4185 rc = vc->vc_sw->con_font_default(vc, &font, s);
4186 else
4187 rc = -ENOSYS;
4188 console_unlock();
4189 if (!rc) {
4190 op->width = font.width;
4191 op->height = font.height;
4192 }
4193 return rc;
4194 }
4195
4196 static int con_font_copy(struct vc_data *vc, struct console_font_op *op)
4197 {
4198 int con = op->height;
4199 int rc;
4200
4201
4202 console_lock();
4203 if (vc->vc_mode != KD_TEXT)
4204 rc = -EINVAL;
4205 else if (!vc->vc_sw->con_font_copy)
4206 rc = -ENOSYS;
4207 else if (con < 0 || !vc_cons_allocated(con))
4208 rc = -ENOTTY;
4209 else if (con == vc->vc_num) /* nothing to do */
4210 rc = 0;
4211 else
4212 rc = vc->vc_sw->con_font_copy(vc, con);
4213 console_unlock();
4214 return rc;
4215 }
4216
4217 int con_font_op(struct vc_data *vc, struct console_font_op *op)
4218 {
4219 switch (op->op) {
4220 case KD_FONT_OP_SET:
4221 return con_font_set(vc, op);
4222 case KD_FONT_OP_GET:
4223 return con_font_get(vc, op);
4224 case KD_FONT_OP_SET_DEFAULT:
4225 return con_font_default(vc, op);
4226 case KD_FONT_OP_COPY:
4227 return con_font_copy(vc, op);
4228 }
4229 return -ENOSYS;
4230 }
4231
4232 /*
4233 * Interface exported to selection and vcs.
4234 */
4235
4236 /* used by selection */
4237 u16 screen_glyph(struct vc_data *vc, int offset)
4238 {
4239 u16 w = scr_readw(screenpos(vc, offset, 1));
4240 u16 c = w & 0xff;
4241
4242 if (w & vc->vc_hi_font_mask)
4243 c |= 0x100;
4244 return c;
4245 }
4246 EXPORT_SYMBOL_GPL(screen_glyph);
4247
4248 /* used by vcs - note the word offset */
4249 unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed)
4250 {
4251 return screenpos(vc, 2 * w_offset, viewed);
4252 }
4253 EXPORT_SYMBOL_GPL(screen_pos);
4254
4255 void getconsxy(struct vc_data *vc, unsigned char *p)
4256 {
4257 p[0] = vc->vc_x;
4258 p[1] = vc->vc_y;
4259 }
4260
4261 void putconsxy(struct vc_data *vc, unsigned char *p)
4262 {
4263 hide_cursor(vc);
4264 gotoxy(vc, p[0], p[1]);
4265 set_cursor(vc);
4266 }
4267
4268 u16 vcs_scr_readw(struct vc_data *vc, const u16 *org)
4269 {
4270 if ((unsigned long)org == vc->vc_pos && softcursor_original != -1)
4271 return softcursor_original;
4272 return scr_readw(org);
4273 }
4274
4275 void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org)
4276 {
4277 scr_writew(val, org);
4278 if ((unsigned long)org == vc->vc_pos) {
4279 softcursor_original = -1;
4280 add_softcursor(vc);
4281 }
4282 }
4283
4284 void vcs_scr_updated(struct vc_data *vc)
4285 {
4286 notify_update(vc);
4287 }
4288
4289 /*
4290 * Visible symbols for modules
4291 */
4292
4293 EXPORT_SYMBOL(color_table);
4294 EXPORT_SYMBOL(default_red);
4295 EXPORT_SYMBOL(default_grn);
4296 EXPORT_SYMBOL(default_blu);
4297 EXPORT_SYMBOL(update_region);
4298 EXPORT_SYMBOL(redraw_screen);
4299 EXPORT_SYMBOL(vc_resize);
4300 EXPORT_SYMBOL(fg_console);
4301 EXPORT_SYMBOL(console_blank_hook);
4302 EXPORT_SYMBOL(console_blanked);
4303 EXPORT_SYMBOL(vc_cons);
4304 EXPORT_SYMBOL(global_cursor_default);
4305 #ifndef VT_SINGLE_DRIVER
4306 EXPORT_SYMBOL(give_up_console);
4307 #endif
Linux kernel - Deliverables
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