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sh_eth: fix EESIPR values for SH77{34|63}
[linux/fpc-iii.git] / drivers / tty / vt / vt.c
blob4c10a9df3b91f3ea2b1143c41cb530a737a48366
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 static inline bool con_is_fg(const struct vc_data *vc)
281 {
282 return vc->vc_num == fg_console;
283 }
284
285 static inline bool con_should_update(const struct vc_data *vc)
286 {
287 return con_is_visible(vc) && !console_blanked;
288 }
289
290 static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed)
291 {
292 unsigned short *p;
293
294 if (!viewed)
295 p = (unsigned short *)(vc->vc_origin + offset);
296 else if (!vc->vc_sw->con_screen_pos)
297 p = (unsigned short *)(vc->vc_visible_origin + offset);
298 else
299 p = vc->vc_sw->con_screen_pos(vc, offset);
300 return p;
301 }
302
303 /* Called from the keyboard irq path.. */
304 static inline void scrolldelta(int lines)
305 {
306 /* FIXME */
307 /* scrolldelta needs some kind of consistency lock, but the BKL was
308 and still is not protecting versus the scheduled back end */
309 scrollback_delta += lines;
310 schedule_console_callback();
311 }
312
313 void schedule_console_callback(void)
314 {
315 schedule_work(&console_work);
316 }
317
318 static void con_scroll(struct vc_data *vc, unsigned int t, unsigned int b,
319 enum con_scroll dir, unsigned int nr)
320 {
321 u16 *clear, *d, *s;
322
323 if (t + nr >= b)
324 nr = b - t - 1;
325 if (b > vc->vc_rows || t >= b || nr < 1)
326 return;
327 if (con_is_visible(vc) && vc->vc_sw->con_scroll(vc, t, b, dir, nr))
328 return;
329
330 s = clear = (u16 *)(vc->vc_origin + vc->vc_size_row * t);
331 d = (u16 *)(vc->vc_origin + vc->vc_size_row * (t + nr));
332
333 if (dir == SM_UP) {
334 clear = s + (b - t - nr) * vc->vc_cols;
335 swap(s, d);
336 }
337 scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row);
338 scr_memsetw(clear, vc->vc_video_erase_char, vc->vc_size_row * nr);
339 }
340
341 static void do_update_region(struct vc_data *vc, unsigned long start, int count)
342 {
343 unsigned int xx, yy, offset;
344 u16 *p;
345
346 p = (u16 *) start;
347 if (!vc->vc_sw->con_getxy) {
348 offset = (start - vc->vc_origin) / 2;
349 xx = offset % vc->vc_cols;
350 yy = offset / vc->vc_cols;
351 } else {
352 int nxx, nyy;
353 start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy);
354 xx = nxx; yy = nyy;
355 }
356 for(;;) {
357 u16 attrib = scr_readw(p) & 0xff00;
358 int startx = xx;
359 u16 *q = p;
360 while (xx < vc->vc_cols && count) {
361 if (attrib != (scr_readw(p) & 0xff00)) {
362 if (p > q)
363 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
364 startx = xx;
365 q = p;
366 attrib = scr_readw(p) & 0xff00;
367 }
368 p++;
369 xx++;
370 count--;
371 }
372 if (p > q)
373 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
374 if (!count)
375 break;
376 xx = 0;
377 yy++;
378 if (vc->vc_sw->con_getxy) {
379 p = (u16 *)start;
380 start = vc->vc_sw->con_getxy(vc, start, NULL, NULL);
381 }
382 }
383 }
384
385 void update_region(struct vc_data *vc, unsigned long start, int count)
386 {
387 WARN_CONSOLE_UNLOCKED();
388
389 if (con_should_update(vc)) {
390 hide_cursor(vc);
391 do_update_region(vc, start, count);
392 set_cursor(vc);
393 }
394 }
395
396 /* Structure of attributes is hardware-dependent */
397
398 static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink,
399 u8 _underline, u8 _reverse, u8 _italic)
400 {
401 if (vc->vc_sw->con_build_attr)
402 return vc->vc_sw->con_build_attr(vc, _color, _intensity,
403 _blink, _underline, _reverse, _italic);
404
405 /*
406 * ++roman: I completely changed the attribute format for monochrome
407 * mode (!can_do_color). The formerly used MDA (monochrome display
408 * adapter) format didn't allow the combination of certain effects.
409 * Now the attribute is just a bit vector:
410 * Bit 0..1: intensity (0..2)
411 * Bit 2 : underline
412 * Bit 3 : reverse
413 * Bit 7 : blink
414 */
415 {
416 u8 a = _color;
417 if (!vc->vc_can_do_color)
418 return _intensity |
419 (_italic ? 2 : 0) |
420 (_underline ? 4 : 0) |
421 (_reverse ? 8 : 0) |
422 (_blink ? 0x80 : 0);
423 if (_italic)
424 a = (a & 0xF0) | vc->vc_itcolor;
425 else if (_underline)
426 a = (a & 0xf0) | vc->vc_ulcolor;
427 else if (_intensity == 0)
428 a = (a & 0xf0) | vc->vc_ulcolor;
429 if (_reverse)
430 a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77);
431 if (_blink)
432 a ^= 0x80;
433 if (_intensity == 2)
434 a ^= 0x08;
435 if (vc->vc_hi_font_mask == 0x100)
436 a <<= 1;
437 return a;
438 }
439 }
440
441 static void update_attr(struct vc_data *vc)
442 {
443 vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity,
444 vc->vc_blink, vc->vc_underline,
445 vc->vc_reverse ^ vc->vc_decscnm, vc->vc_italic);
446 vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm, 0) << 8) | ' ';
447 }
448
449 /* Note: inverting the screen twice should revert to the original state */
450 void invert_screen(struct vc_data *vc, int offset, int count, int viewed)
451 {
452 unsigned short *p;
453
454 WARN_CONSOLE_UNLOCKED();
455
456 count /= 2;
457 p = screenpos(vc, offset, viewed);
458 if (vc->vc_sw->con_invert_region) {
459 vc->vc_sw->con_invert_region(vc, p, count);
460 } else {
461 u16 *q = p;
462 int cnt = count;
463 u16 a;
464
465 if (!vc->vc_can_do_color) {
466 while (cnt--) {
467 a = scr_readw(q);
468 a ^= 0x0800;
469 scr_writew(a, q);
470 q++;
471 }
472 } else if (vc->vc_hi_font_mask == 0x100) {
473 while (cnt--) {
474 a = scr_readw(q);
475 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4);
476 scr_writew(a, q);
477 q++;
478 }
479 } else {
480 while (cnt--) {
481 a = scr_readw(q);
482 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4);
483 scr_writew(a, q);
484 q++;
485 }
486 }
487 }
488
489 if (con_should_update(vc))
490 do_update_region(vc, (unsigned long) p, count);
491 notify_update(vc);
492 }
493
494 /* used by selection: complement pointer position */
495 void complement_pos(struct vc_data *vc, int offset)
496 {
497 static int old_offset = -1;
498 static unsigned short old;
499 static unsigned short oldx, oldy;
500
501 WARN_CONSOLE_UNLOCKED();
502
503 if (old_offset != -1 && old_offset >= 0 &&
504 old_offset < vc->vc_screenbuf_size) {
505 scr_writew(old, screenpos(vc, old_offset, 1));
506 if (con_should_update(vc))
507 vc->vc_sw->con_putc(vc, old, oldy, oldx);
508 notify_update(vc);
509 }
510
511 old_offset = offset;
512
513 if (offset != -1 && offset >= 0 &&
514 offset < vc->vc_screenbuf_size) {
515 unsigned short new;
516 unsigned short *p;
517 p = screenpos(vc, offset, 1);
518 old = scr_readw(p);
519 new = old ^ vc->vc_complement_mask;
520 scr_writew(new, p);
521 if (con_should_update(vc)) {
522 oldx = (offset >> 1) % vc->vc_cols;
523 oldy = (offset >> 1) / vc->vc_cols;
524 vc->vc_sw->con_putc(vc, new, oldy, oldx);
525 }
526 notify_update(vc);
527 }
528 }
529
530 static void insert_char(struct vc_data *vc, unsigned int nr)
531 {
532 unsigned short *p = (unsigned short *) vc->vc_pos;
533
534 scr_memmovew(p + nr, p, (vc->vc_cols - vc->vc_x - nr) * 2);
535 scr_memsetw(p, vc->vc_video_erase_char, nr * 2);
536 vc->vc_need_wrap = 0;
537 if (con_should_update(vc))
538 do_update_region(vc, (unsigned long) p,
539 vc->vc_cols - vc->vc_x);
540 }
541
542 static void delete_char(struct vc_data *vc, unsigned int nr)
543 {
544 unsigned short *p = (unsigned short *) vc->vc_pos;
545
546 scr_memcpyw(p, p + nr, (vc->vc_cols - vc->vc_x - nr) * 2);
547 scr_memsetw(p + vc->vc_cols - vc->vc_x - nr, vc->vc_video_erase_char,
548 nr * 2);
549 vc->vc_need_wrap = 0;
550 if (con_should_update(vc))
551 do_update_region(vc, (unsigned long) p,
552 vc->vc_cols - vc->vc_x);
553 }
554
555 static int softcursor_original = -1;
556
557 static void add_softcursor(struct vc_data *vc)
558 {
559 int i = scr_readw((u16 *) vc->vc_pos);
560 u32 type = vc->vc_cursor_type;
561
562 if (! (type & 0x10)) return;
563 if (softcursor_original != -1) return;
564 softcursor_original = i;
565 i |= ((type >> 8) & 0xff00 );
566 i ^= ((type) & 0xff00 );
567 if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000;
568 if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700;
569 scr_writew(i, (u16 *) vc->vc_pos);
570 if (con_should_update(vc))
571 vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x);
572 }
573
574 static void hide_softcursor(struct vc_data *vc)
575 {
576 if (softcursor_original != -1) {
577 scr_writew(softcursor_original, (u16 *)vc->vc_pos);
578 if (con_should_update(vc))
579 vc->vc_sw->con_putc(vc, softcursor_original,
580 vc->vc_y, vc->vc_x);
581 softcursor_original = -1;
582 }
583 }
584
585 static void hide_cursor(struct vc_data *vc)
586 {
587 if (vc == sel_cons)
588 clear_selection();
589 vc->vc_sw->con_cursor(vc, CM_ERASE);
590 hide_softcursor(vc);
591 }
592
593 static void set_cursor(struct vc_data *vc)
594 {
595 if (!con_is_fg(vc) || console_blanked || vc->vc_mode == KD_GRAPHICS)
596 return;
597 if (vc->vc_deccm) {
598 if (vc == sel_cons)
599 clear_selection();
600 add_softcursor(vc);
601 if ((vc->vc_cursor_type & 0x0f) != 1)
602 vc->vc_sw->con_cursor(vc, CM_DRAW);
603 } else
604 hide_cursor(vc);
605 }
606
607 static void set_origin(struct vc_data *vc)
608 {
609 WARN_CONSOLE_UNLOCKED();
610
611 if (!con_is_visible(vc) ||
612 !vc->vc_sw->con_set_origin ||
613 !vc->vc_sw->con_set_origin(vc))
614 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
615 vc->vc_visible_origin = vc->vc_origin;
616 vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size;
617 vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x;
618 }
619
620 static void save_screen(struct vc_data *vc)
621 {
622 WARN_CONSOLE_UNLOCKED();
623
624 if (vc->vc_sw->con_save_screen)
625 vc->vc_sw->con_save_screen(vc);
626 }
627
628 /*
629 * Redrawing of screen
630 */
631
632 void clear_buffer_attributes(struct vc_data *vc)
633 {
634 unsigned short *p = (unsigned short *)vc->vc_origin;
635 int count = vc->vc_screenbuf_size / 2;
636 int mask = vc->vc_hi_font_mask | 0xff;
637
638 for (; count > 0; count--, p++) {
639 scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p);
640 }
641 }
642
643 void redraw_screen(struct vc_data *vc, int is_switch)
644 {
645 int redraw = 0;
646
647 WARN_CONSOLE_UNLOCKED();
648
649 if (!vc) {
650 /* strange ... */
651 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
652 return;
653 }
654
655 if (is_switch) {
656 struct vc_data *old_vc = vc_cons[fg_console].d;
657 if (old_vc == vc)
658 return;
659 if (!con_is_visible(vc))
660 redraw = 1;
661 *vc->vc_display_fg = vc;
662 fg_console = vc->vc_num;
663 hide_cursor(old_vc);
664 if (!con_is_visible(old_vc)) {
665 save_screen(old_vc);
666 set_origin(old_vc);
667 }
668 if (tty0dev)
669 sysfs_notify(&tty0dev->kobj, NULL, "active");
670 } else {
671 hide_cursor(vc);
672 redraw = 1;
673 }
674
675 if (redraw) {
676 int update;
677 int old_was_color = vc->vc_can_do_color;
678
679 set_origin(vc);
680 update = vc->vc_sw->con_switch(vc);
681 set_palette(vc);
682 /*
683 * If console changed from mono<->color, the best we can do
684 * is to clear the buffer attributes. As it currently stands,
685 * rebuilding new attributes from the old buffer is not doable
686 * without overly complex code.
687 */
688 if (old_was_color != vc->vc_can_do_color) {
689 update_attr(vc);
690 clear_buffer_attributes(vc);
691 }
692
693 /* Forcibly update if we're panicing */
694 if ((update && vc->vc_mode != KD_GRAPHICS) ||
695 vt_force_oops_output(vc))
696 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
697 }
698 set_cursor(vc);
699 if (is_switch) {
700 set_leds();
701 compute_shiftstate();
702 notify_update(vc);
703 }
704 }
705
706 /*
707 * Allocation, freeing and resizing of VTs.
708 */
709
710 int vc_cons_allocated(unsigned int i)
711 {
712 return (i < MAX_NR_CONSOLES && vc_cons[i].d);
713 }
714
715 static void visual_init(struct vc_data *vc, int num, int init)
716 {
717 /* ++Geert: vc->vc_sw->con_init determines console size */
718 if (vc->vc_sw)
719 module_put(vc->vc_sw->owner);
720 vc->vc_sw = conswitchp;
721 #ifndef VT_SINGLE_DRIVER
722 if (con_driver_map[num])
723 vc->vc_sw = con_driver_map[num];
724 #endif
725 __module_get(vc->vc_sw->owner);
726 vc->vc_num = num;
727 vc->vc_display_fg = &master_display_fg;
728 if (vc->vc_uni_pagedir_loc)
729 con_free_unimap(vc);
730 vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir;
731 vc->vc_uni_pagedir = NULL;
732 vc->vc_hi_font_mask = 0;
733 vc->vc_complement_mask = 0;
734 vc->vc_can_do_color = 0;
735 vc->vc_panic_force_write = false;
736 vc->vc_cur_blink_ms = DEFAULT_CURSOR_BLINK_MS;
737 vc->vc_sw->con_init(vc, init);
738 if (!vc->vc_complement_mask)
739 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
740 vc->vc_s_complement_mask = vc->vc_complement_mask;
741 vc->vc_size_row = vc->vc_cols << 1;
742 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
743 }
744
745 int vc_allocate(unsigned int currcons) /* return 0 on success */
746 {
747 struct vt_notifier_param param;
748 struct vc_data *vc;
749
750 WARN_CONSOLE_UNLOCKED();
751
752 if (currcons >= MAX_NR_CONSOLES)
753 return -ENXIO;
754
755 if (vc_cons[currcons].d)
756 return 0;
757
758 /* due to the granularity of kmalloc, we waste some memory here */
759 /* the alloc is done in two steps, to optimize the common situation
760 of a 25x80 console (structsize=216, screenbuf_size=4000) */
761 /* although the numbers above are not valid since long ago, the
762 point is still up-to-date and the comment still has its value
763 even if only as a historical artifact. --mj, July 1998 */
764 param.vc = vc = kzalloc(sizeof(struct vc_data), GFP_KERNEL);
765 if (!vc)
766 return -ENOMEM;
767
768 vc_cons[currcons].d = vc;
769 tty_port_init(&vc->port);
770 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
771
772 visual_init(vc, currcons, 1);
773
774 if (!*vc->vc_uni_pagedir_loc)
775 con_set_default_unimap(vc);
776
777 vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL);
778 if (!vc->vc_screenbuf)
779 goto err_free;
780
781 /* If no drivers have overridden us and the user didn't pass a
782 boot option, default to displaying the cursor */
783 if (global_cursor_default == -1)
784 global_cursor_default = 1;
785
786 vc_init(vc, vc->vc_rows, vc->vc_cols, 1);
787 vcs_make_sysfs(currcons);
788 atomic_notifier_call_chain(&vt_notifier_list, VT_ALLOCATE, &param);
789
790 return 0;
791 err_free:
792 kfree(vc);
793 vc_cons[currcons].d = NULL;
794 return -ENOMEM;
795 }
796
797 static inline int resize_screen(struct vc_data *vc, int width, int height,
798 int user)
799 {
800 /* Resizes the resolution of the display adapater */
801 int err = 0;
802
803 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize)
804 err = vc->vc_sw->con_resize(vc, width, height, user);
805
806 return err;
807 }
808
809 /*
810 * Change # of rows and columns (0 means unchanged/the size of fg_console)
811 * [this is to be used together with some user program
812 * like resize that changes the hardware videomode]
813 */
814 #define VC_RESIZE_MAXCOL (32767)
815 #define VC_RESIZE_MAXROW (32767)
816
817 /**
818 * vc_do_resize - resizing method for the tty
819 * @tty: tty being resized
820 * @real_tty: real tty (different to tty if a pty/tty pair)
821 * @vc: virtual console private data
822 * @cols: columns
823 * @lines: lines
824 *
825 * Resize a virtual console, clipping according to the actual constraints.
826 * If the caller passes a tty structure then update the termios winsize
827 * information and perform any necessary signal handling.
828 *
829 * Caller must hold the console semaphore. Takes the termios rwsem and
830 * ctrl_lock of the tty IFF a tty is passed.
831 */
832
833 static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc,
834 unsigned int cols, unsigned int lines)
835 {
836 unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0;
837 unsigned long end;
838 unsigned int old_rows, old_row_size;
839 unsigned int new_cols, new_rows, new_row_size, new_screen_size;
840 unsigned int user;
841 unsigned short *newscreen;
842
843 WARN_CONSOLE_UNLOCKED();
844
845 if (!vc)
846 return -ENXIO;
847
848 user = vc->vc_resize_user;
849 vc->vc_resize_user = 0;
850
851 if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW)
852 return -EINVAL;
853
854 new_cols = (cols ? cols : vc->vc_cols);
855 new_rows = (lines ? lines : vc->vc_rows);
856 new_row_size = new_cols << 1;
857 new_screen_size = new_row_size * new_rows;
858
859 if (new_cols == vc->vc_cols && new_rows == vc->vc_rows)
860 return 0;
861
862 if (new_screen_size > (4 << 20))
863 return -EINVAL;
864 newscreen = kmalloc(new_screen_size, GFP_USER);
865 if (!newscreen)
866 return -ENOMEM;
867
868 if (vc == sel_cons)
869 clear_selection();
870
871 old_rows = vc->vc_rows;
872 old_row_size = vc->vc_size_row;
873
874 err = resize_screen(vc, new_cols, new_rows, user);
875 if (err) {
876 kfree(newscreen);
877 return err;
878 }
879
880 vc->vc_rows = new_rows;
881 vc->vc_cols = new_cols;
882 vc->vc_size_row = new_row_size;
883 vc->vc_screenbuf_size = new_screen_size;
884
885 rlth = min(old_row_size, new_row_size);
886 rrem = new_row_size - rlth;
887 old_origin = vc->vc_origin;
888 new_origin = (long) newscreen;
889 new_scr_end = new_origin + new_screen_size;
890
891 if (vc->vc_y > new_rows) {
892 if (old_rows - vc->vc_y < new_rows) {
893 /*
894 * Cursor near the bottom, copy contents from the
895 * bottom of buffer
896 */
897 old_origin += (old_rows - new_rows) * old_row_size;
898 } else {
899 /*
900 * Cursor is in no man's land, copy 1/2 screenful
901 * from the top and bottom of cursor position
902 */
903 old_origin += (vc->vc_y - new_rows/2) * old_row_size;
904 }
905 }
906
907 end = old_origin + old_row_size * min(old_rows, new_rows);
908
909 update_attr(vc);
910
911 while (old_origin < end) {
912 scr_memcpyw((unsigned short *) new_origin,
913 (unsigned short *) old_origin, rlth);
914 if (rrem)
915 scr_memsetw((void *)(new_origin + rlth),
916 vc->vc_video_erase_char, rrem);
917 old_origin += old_row_size;
918 new_origin += new_row_size;
919 }
920 if (new_scr_end > new_origin)
921 scr_memsetw((void *)new_origin, vc->vc_video_erase_char,
922 new_scr_end - new_origin);
923 kfree(vc->vc_screenbuf);
924 vc->vc_screenbuf = newscreen;
925 vc->vc_screenbuf_size = new_screen_size;
926 set_origin(vc);
927
928 /* do part of a reset_terminal() */
929 vc->vc_top = 0;
930 vc->vc_bottom = vc->vc_rows;
931 gotoxy(vc, vc->vc_x, vc->vc_y);
932 save_cur(vc);
933
934 if (tty) {
935 /* Rewrite the requested winsize data with the actual
936 resulting sizes */
937 struct winsize ws;
938 memset(&ws, 0, sizeof(ws));
939 ws.ws_row = vc->vc_rows;
940 ws.ws_col = vc->vc_cols;
941 ws.ws_ypixel = vc->vc_scan_lines;
942 tty_do_resize(tty, &ws);
943 }
944
945 if (con_is_visible(vc))
946 update_screen(vc);
947 vt_event_post(VT_EVENT_RESIZE, vc->vc_num, vc->vc_num);
948 return err;
949 }
950
951 /**
952 * vc_resize - resize a VT
953 * @vc: virtual console
954 * @cols: columns
955 * @rows: rows
956 *
957 * Resize a virtual console as seen from the console end of things. We
958 * use the common vc_do_resize methods to update the structures. The
959 * caller must hold the console sem to protect console internals and
960 * vc->port.tty
961 */
962
963 int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int rows)
964 {
965 return vc_do_resize(vc->port.tty, vc, cols, rows);
966 }
967
968 /**
969 * vt_resize - resize a VT
970 * @tty: tty to resize
971 * @ws: winsize attributes
972 *
973 * Resize a virtual terminal. This is called by the tty layer as we
974 * register our own handler for resizing. The mutual helper does all
975 * the actual work.
976 *
977 * Takes the console sem and the called methods then take the tty
978 * termios_rwsem and the tty ctrl_lock in that order.
979 */
980 static int vt_resize(struct tty_struct *tty, struct winsize *ws)
981 {
982 struct vc_data *vc = tty->driver_data;
983 int ret;
984
985 console_lock();
986 ret = vc_do_resize(tty, vc, ws->ws_col, ws->ws_row);
987 console_unlock();
988 return ret;
989 }
990
991 struct vc_data *vc_deallocate(unsigned int currcons)
992 {
993 struct vc_data *vc = NULL;
994
995 WARN_CONSOLE_UNLOCKED();
996
997 if (vc_cons_allocated(currcons)) {
998 struct vt_notifier_param param;
999
1000 param.vc = vc = vc_cons[currcons].d;
1001 atomic_notifier_call_chain(&vt_notifier_list, VT_DEALLOCATE, &param);
1002 vcs_remove_sysfs(currcons);
1003 vc->vc_sw->con_deinit(vc);
1004 put_pid(vc->vt_pid);
1005 module_put(vc->vc_sw->owner);
1006 kfree(vc->vc_screenbuf);
1007 vc_cons[currcons].d = NULL;
1008 }
1009 return vc;
1010 }
1011
1012 /*
1013 * VT102 emulator
1014 */
1015
1016 #define set_kbd(vc, x) vt_set_kbd_mode_bit((vc)->vc_num, (x))
1017 #define clr_kbd(vc, x) vt_clr_kbd_mode_bit((vc)->vc_num, (x))
1018 #define is_kbd(vc, x) vt_get_kbd_mode_bit((vc)->vc_num, (x))
1019
1020 #define decarm VC_REPEAT
1021 #define decckm VC_CKMODE
1022 #define kbdapplic VC_APPLIC
1023 #define lnm VC_CRLF
1024
1025 /*
1026 * this is what the terminal answers to a ESC-Z or csi0c query.
1027 */
1028 #define VT100ID "\033[?1;2c"
1029 #define VT102ID "\033[?6c"
1030
1031 const unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7,
1032 8,12,10,14, 9,13,11,15 };
1033
1034 /* the default colour table, for VGA+ colour systems */
1035 unsigned char default_red[] = {
1036 0x00, 0xaa, 0x00, 0xaa, 0x00, 0xaa, 0x00, 0xaa,
1037 0x55, 0xff, 0x55, 0xff, 0x55, 0xff, 0x55, 0xff
1038 };
1039 module_param_array(default_red, byte, NULL, S_IRUGO | S_IWUSR);
1040
1041 unsigned char default_grn[] = {
1042 0x00, 0x00, 0xaa, 0x55, 0x00, 0x00, 0xaa, 0xaa,
1043 0x55, 0x55, 0xff, 0xff, 0x55, 0x55, 0xff, 0xff
1044 };
1045 module_param_array(default_grn, byte, NULL, S_IRUGO | S_IWUSR);
1046
1047 unsigned char default_blu[] = {
1048 0x00, 0x00, 0x00, 0x00, 0xaa, 0xaa, 0xaa, 0xaa,
1049 0x55, 0x55, 0x55, 0x55, 0xff, 0xff, 0xff, 0xff
1050 };
1051 module_param_array(default_blu, byte, 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)
1095 {
1096 scrolldelta(-(vc->vc_rows / 2));
1097 }
1098
1099 void scrollfront(struct vc_data *vc, int lines)
1100 {
1101 if (!lines)
1102 lines = vc->vc_rows / 2;
1103 scrolldelta(lines);
1104 }
1105
1106 static void lf(struct vc_data *vc)
1107 {
1108 /* don't scroll if above bottom of scrolling region, or
1109 * if below scrolling region
1110 */
1111 if (vc->vc_y + 1 == vc->vc_bottom)
1112 con_scroll(vc, vc->vc_top, vc->vc_bottom, SM_UP, 1);
1113 else if (vc->vc_y < vc->vc_rows - 1) {
1114 vc->vc_y++;
1115 vc->vc_pos += vc->vc_size_row;
1116 }
1117 vc->vc_need_wrap = 0;
1118 notify_write(vc, '\n');
1119 }
1120
1121 static void ri(struct vc_data *vc)
1122 {
1123 /* don't scroll if below top of scrolling region, or
1124 * if above scrolling region
1125 */
1126 if (vc->vc_y == vc->vc_top)
1127 con_scroll(vc, vc->vc_top, vc->vc_bottom, SM_DOWN, 1);
1128 else if (vc->vc_y > 0) {
1129 vc->vc_y--;
1130 vc->vc_pos -= vc->vc_size_row;
1131 }
1132 vc->vc_need_wrap = 0;
1133 }
1134
1135 static inline void cr(struct vc_data *vc)
1136 {
1137 vc->vc_pos -= vc->vc_x << 1;
1138 vc->vc_need_wrap = vc->vc_x = 0;
1139 notify_write(vc, '\r');
1140 }
1141
1142 static inline void bs(struct vc_data *vc)
1143 {
1144 if (vc->vc_x) {
1145 vc->vc_pos -= 2;
1146 vc->vc_x--;
1147 vc->vc_need_wrap = 0;
1148 notify_write(vc, '\b');
1149 }
1150 }
1151
1152 static inline void del(struct vc_data *vc)
1153 {
1154 /* ignored */
1155 }
1156
1157 static void csi_J(struct vc_data *vc, int vpar)
1158 {
1159 unsigned int count;
1160 unsigned short * start;
1161
1162 switch (vpar) {
1163 case 0: /* erase from cursor to end of display */
1164 count = (vc->vc_scr_end - vc->vc_pos) >> 1;
1165 start = (unsigned short *)vc->vc_pos;
1166 break;
1167 case 1: /* erase from start to cursor */
1168 count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1;
1169 start = (unsigned short *)vc->vc_origin;
1170 break;
1171 case 3: /* erase scroll-back buffer (and whole display) */
1172 scr_memsetw(vc->vc_screenbuf, vc->vc_video_erase_char,
1173 vc->vc_screenbuf_size);
1174 set_origin(vc);
1175 if (con_is_visible(vc))
1176 update_screen(vc);
1177 /* fall through */
1178 case 2: /* erase whole display */
1179 count = vc->vc_cols * vc->vc_rows;
1180 start = (unsigned short *)vc->vc_origin;
1181 break;
1182 default:
1183 return;
1184 }
1185 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1186 if (con_should_update(vc))
1187 do_update_region(vc, (unsigned long) start, count);
1188 vc->vc_need_wrap = 0;
1189 }
1190
1191 static void csi_K(struct vc_data *vc, int vpar)
1192 {
1193 unsigned int count;
1194 unsigned short * start;
1195
1196 switch (vpar) {
1197 case 0: /* erase from cursor to end of line */
1198 count = vc->vc_cols - vc->vc_x;
1199 start = (unsigned short *)vc->vc_pos;
1200 break;
1201 case 1: /* erase from start of line to cursor */
1202 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1203 count = vc->vc_x + 1;
1204 break;
1205 case 2: /* erase whole line */
1206 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1207 count = vc->vc_cols;
1208 break;
1209 default:
1210 return;
1211 }
1212 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1213 vc->vc_need_wrap = 0;
1214 if (con_should_update(vc))
1215 do_update_region(vc, (unsigned long) start, count);
1216 }
1217
1218 static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */
1219 { /* not vt100? */
1220 int count;
1221
1222 if (!vpar)
1223 vpar++;
1224 count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar;
1225
1226 scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count);
1227 if (con_should_update(vc))
1228 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count);
1229 vc->vc_need_wrap = 0;
1230 }
1231
1232 static void default_attr(struct vc_data *vc)
1233 {
1234 vc->vc_intensity = 1;
1235 vc->vc_italic = 0;
1236 vc->vc_underline = 0;
1237 vc->vc_reverse = 0;
1238 vc->vc_blink = 0;
1239 vc->vc_color = vc->vc_def_color;
1240 }
1241
1242 struct rgb { u8 r; u8 g; u8 b; };
1243
1244 static void rgb_from_256(int i, struct rgb *c)
1245 {
1246 if (i < 8) { /* Standard colours. */
1247 c->r = i&1 ? 0xaa : 0x00;
1248 c->g = i&2 ? 0xaa : 0x00;
1249 c->b = i&4 ? 0xaa : 0x00;
1250 } else if (i < 16) {
1251 c->r = i&1 ? 0xff : 0x55;
1252 c->g = i&2 ? 0xff : 0x55;
1253 c->b = i&4 ? 0xff : 0x55;
1254 } else if (i < 232) { /* 6x6x6 colour cube. */
1255 c->r = (i - 16) / 36 * 85 / 2;
1256 c->g = (i - 16) / 6 % 6 * 85 / 2;
1257 c->b = (i - 16) % 6 * 85 / 2;
1258 } else /* Grayscale ramp. */
1259 c->r = c->g = c->b = i * 10 - 2312;
1260 }
1261
1262 static void rgb_foreground(struct vc_data *vc, const struct rgb *c)
1263 {
1264 u8 hue = 0, max = max3(c->r, c->g, c->b);
1265
1266 if (c->r > max / 2)
1267 hue |= 4;
1268 if (c->g > max / 2)
1269 hue |= 2;
1270 if (c->b > max / 2)
1271 hue |= 1;
1272
1273 if (hue == 7 && max <= 0x55) {
1274 hue = 0;
1275 vc->vc_intensity = 2;
1276 } else if (max > 0xaa)
1277 vc->vc_intensity = 2;
1278 else
1279 vc->vc_intensity = 1;
1280
1281 vc->vc_color = (vc->vc_color & 0xf0) | hue;
1282 }
1283
1284 static void rgb_background(struct vc_data *vc, const struct rgb *c)
1285 {
1286 /* For backgrounds, err on the dark side. */
1287 vc->vc_color = (vc->vc_color & 0x0f)
1288 | (c->r&0x80) >> 1 | (c->g&0x80) >> 2 | (c->b&0x80) >> 3;
1289 }
1290
1291 /*
1292 * ITU T.416 Higher colour modes. They break the usual properties of SGR codes
1293 * and thus need to be detected and ignored by hand. Strictly speaking, that
1294 * standard also wants : rather than ; as separators, contrary to ECMA-48, but
1295 * no one produces such codes and almost no one accepts them.
1296 *
1297 * Subcommands 3 (CMY) and 4 (CMYK) are so insane there's no point in
1298 * supporting them.
1299 */
1300 static int vc_t416_color(struct vc_data *vc, int i,
1301 void(*set_color)(struct vc_data *vc, const struct rgb *c))
1302 {
1303 struct rgb c;
1304
1305 i++;
1306 if (i > vc->vc_npar)
1307 return i;
1308
1309 if (vc->vc_par[i] == 5 && i + 1 <= vc->vc_npar) {
1310 /* 256 colours */
1311 i++;
1312 rgb_from_256(vc->vc_par[i], &c);
1313 } else if (vc->vc_par[i] == 2 && i + 3 <= vc->vc_npar) {
1314 /* 24 bit */
1315 c.r = vc->vc_par[i + 1];
1316 c.g = vc->vc_par[i + 2];
1317 c.b = vc->vc_par[i + 3];
1318 i += 3;
1319 } else
1320 return i;
1321
1322 set_color(vc, &c);
1323
1324 return i;
1325 }
1326
1327 /* console_lock is held */
1328 static void csi_m(struct vc_data *vc)
1329 {
1330 int i;
1331
1332 for (i = 0; i <= vc->vc_npar; i++)
1333 switch (vc->vc_par[i]) {
1334 case 0: /* all attributes off */
1335 default_attr(vc);
1336 break;
1337 case 1:
1338 vc->vc_intensity = 2;
1339 break;
1340 case 2:
1341 vc->vc_intensity = 0;
1342 break;
1343 case 3:
1344 vc->vc_italic = 1;
1345 break;
1346 case 4:
1347 vc->vc_underline = 1;
1348 break;
1349 case 5:
1350 vc->vc_blink = 1;
1351 break;
1352 case 7:
1353 vc->vc_reverse = 1;
1354 break;
1355 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1356 * Select primary font, don't display control chars if
1357 * defined, don't set bit 8 on output.
1358 */
1359 vc->vc_translate = set_translate(vc->vc_charset == 0
1360 ? vc->vc_G0_charset
1361 : vc->vc_G1_charset, vc);
1362 vc->vc_disp_ctrl = 0;
1363 vc->vc_toggle_meta = 0;
1364 break;
1365 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1366 * Select first alternate font, lets chars < 32 be
1367 * displayed as ROM chars.
1368 */
1369 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1370 vc->vc_disp_ctrl = 1;
1371 vc->vc_toggle_meta = 0;
1372 break;
1373 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1374 * Select second alternate font, toggle high bit
1375 * before displaying as ROM char.
1376 */
1377 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1378 vc->vc_disp_ctrl = 1;
1379 vc->vc_toggle_meta = 1;
1380 break;
1381 case 21:
1382 case 22:
1383 vc->vc_intensity = 1;
1384 break;
1385 case 23:
1386 vc->vc_italic = 0;
1387 break;
1388 case 24:
1389 vc->vc_underline = 0;
1390 break;
1391 case 25:
1392 vc->vc_blink = 0;
1393 break;
1394 case 27:
1395 vc->vc_reverse = 0;
1396 break;
1397 case 38:
1398 i = vc_t416_color(vc, i, rgb_foreground);
1399 break;
1400 case 48:
1401 i = vc_t416_color(vc, i, rgb_background);
1402 break;
1403 case 39:
1404 vc->vc_color = (vc->vc_def_color & 0x0f) |
1405 (vc->vc_color & 0xf0);
1406 break;
1407 case 49:
1408 vc->vc_color = (vc->vc_def_color & 0xf0) |
1409 (vc->vc_color & 0x0f);
1410 break;
1411 default:
1412 if (vc->vc_par[i] >= 90 && vc->vc_par[i] <= 107) {
1413 if (vc->vc_par[i] < 100)
1414 vc->vc_intensity = 2;
1415 vc->vc_par[i] -= 60;
1416 }
1417 if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37)
1418 vc->vc_color = color_table[vc->vc_par[i] - 30]
1419 | (vc->vc_color & 0xf0);
1420 else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47)
1421 vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4)
1422 | (vc->vc_color & 0x0f);
1423 break;
1424 }
1425 update_attr(vc);
1426 }
1427
1428 static void respond_string(const char *p, struct tty_port *port)
1429 {
1430 while (*p) {
1431 tty_insert_flip_char(port, *p, 0);
1432 p++;
1433 }
1434 tty_schedule_flip(port);
1435 }
1436
1437 static void cursor_report(struct vc_data *vc, struct tty_struct *tty)
1438 {
1439 char buf[40];
1440
1441 sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1);
1442 respond_string(buf, tty->port);
1443 }
1444
1445 static inline void status_report(struct tty_struct *tty)
1446 {
1447 respond_string("\033[0n", tty->port); /* Terminal ok */
1448 }
1449
1450 static inline void respond_ID(struct tty_struct *tty)
1451 {
1452 respond_string(VT102ID, tty->port);
1453 }
1454
1455 void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry)
1456 {
1457 char buf[8];
1458
1459 sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx),
1460 (char)('!' + mry));
1461 respond_string(buf, tty->port);
1462 }
1463
1464 /* invoked via ioctl(TIOCLINUX) and through set_selection */
1465 int mouse_reporting(void)
1466 {
1467 return vc_cons[fg_console].d->vc_report_mouse;
1468 }
1469
1470 /* console_lock is held */
1471 static void set_mode(struct vc_data *vc, int on_off)
1472 {
1473 int i;
1474
1475 for (i = 0; i <= vc->vc_npar; i++)
1476 if (vc->vc_ques) {
1477 switch(vc->vc_par[i]) { /* DEC private modes set/reset */
1478 case 1: /* Cursor keys send ^[Ox/^[[x */
1479 if (on_off)
1480 set_kbd(vc, decckm);
1481 else
1482 clr_kbd(vc, decckm);
1483 break;
1484 case 3: /* 80/132 mode switch unimplemented */
1485 #if 0
1486 vc_resize(deccolm ? 132 : 80, vc->vc_rows);
1487 /* this alone does not suffice; some user mode
1488 utility has to change the hardware regs */
1489 #endif
1490 break;
1491 case 5: /* Inverted screen on/off */
1492 if (vc->vc_decscnm != on_off) {
1493 vc->vc_decscnm = on_off;
1494 invert_screen(vc, 0, vc->vc_screenbuf_size, 0);
1495 update_attr(vc);
1496 }
1497 break;
1498 case 6: /* Origin relative/absolute */
1499 vc->vc_decom = on_off;
1500 gotoxay(vc, 0, 0);
1501 break;
1502 case 7: /* Autowrap on/off */
1503 vc->vc_decawm = on_off;
1504 break;
1505 case 8: /* Autorepeat on/off */
1506 if (on_off)
1507 set_kbd(vc, decarm);
1508 else
1509 clr_kbd(vc, decarm);
1510 break;
1511 case 9:
1512 vc->vc_report_mouse = on_off ? 1 : 0;
1513 break;
1514 case 25: /* Cursor on/off */
1515 vc->vc_deccm = on_off;
1516 break;
1517 case 1000:
1518 vc->vc_report_mouse = on_off ? 2 : 0;
1519 break;
1520 }
1521 } else {
1522 switch(vc->vc_par[i]) { /* ANSI modes set/reset */
1523 case 3: /* Monitor (display ctrls) */
1524 vc->vc_disp_ctrl = on_off;
1525 break;
1526 case 4: /* Insert Mode on/off */
1527 vc->vc_decim = on_off;
1528 break;
1529 case 20: /* Lf, Enter == CrLf/Lf */
1530 if (on_off)
1531 set_kbd(vc, lnm);
1532 else
1533 clr_kbd(vc, lnm);
1534 break;
1535 }
1536 }
1537 }
1538
1539 /* console_lock is held */
1540 static void setterm_command(struct vc_data *vc)
1541 {
1542 switch(vc->vc_par[0]) {
1543 case 1: /* set color for underline mode */
1544 if (vc->vc_can_do_color &&
1545 vc->vc_par[1] < 16) {
1546 vc->vc_ulcolor = color_table[vc->vc_par[1]];
1547 if (vc->vc_underline)
1548 update_attr(vc);
1549 }
1550 break;
1551 case 2: /* set color for half intensity mode */
1552 if (vc->vc_can_do_color &&
1553 vc->vc_par[1] < 16) {
1554 vc->vc_halfcolor = color_table[vc->vc_par[1]];
1555 if (vc->vc_intensity == 0)
1556 update_attr(vc);
1557 }
1558 break;
1559 case 8: /* store colors as defaults */
1560 vc->vc_def_color = vc->vc_attr;
1561 if (vc->vc_hi_font_mask == 0x100)
1562 vc->vc_def_color >>= 1;
1563 default_attr(vc);
1564 update_attr(vc);
1565 break;
1566 case 9: /* set blanking interval */
1567 blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60;
1568 poke_blanked_console();
1569 break;
1570 case 10: /* set bell frequency in Hz */
1571 if (vc->vc_npar >= 1)
1572 vc->vc_bell_pitch = vc->vc_par[1];
1573 else
1574 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1575 break;
1576 case 11: /* set bell duration in msec */
1577 if (vc->vc_npar >= 1)
1578 vc->vc_bell_duration = (vc->vc_par[1] < 2000) ?
1579 msecs_to_jiffies(vc->vc_par[1]) : 0;
1580 else
1581 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1582 break;
1583 case 12: /* bring specified console to the front */
1584 if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1))
1585 set_console(vc->vc_par[1] - 1);
1586 break;
1587 case 13: /* unblank the screen */
1588 poke_blanked_console();
1589 break;
1590 case 14: /* set vesa powerdown interval */
1591 vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1592 break;
1593 case 15: /* activate the previous console */
1594 set_console(last_console);
1595 break;
1596 case 16: /* set cursor blink duration in msec */
1597 if (vc->vc_npar >= 1 && vc->vc_par[1] >= 50 &&
1598 vc->vc_par[1] <= USHRT_MAX)
1599 vc->vc_cur_blink_ms = vc->vc_par[1];
1600 else
1601 vc->vc_cur_blink_ms = DEFAULT_CURSOR_BLINK_MS;
1602 break;
1603 }
1604 }
1605
1606 /* console_lock is held */
1607 static void csi_at(struct vc_data *vc, unsigned int nr)
1608 {
1609 if (nr > vc->vc_cols - vc->vc_x)
1610 nr = vc->vc_cols - vc->vc_x;
1611 else if (!nr)
1612 nr = 1;
1613 insert_char(vc, nr);
1614 }
1615
1616 /* console_lock is held */
1617 static void csi_L(struct vc_data *vc, unsigned int nr)
1618 {
1619 if (nr > vc->vc_rows - vc->vc_y)
1620 nr = vc->vc_rows - vc->vc_y;
1621 else if (!nr)
1622 nr = 1;
1623 con_scroll(vc, vc->vc_y, vc->vc_bottom, SM_DOWN, nr);
1624 vc->vc_need_wrap = 0;
1625 }
1626
1627 /* console_lock is held */
1628 static void csi_P(struct vc_data *vc, unsigned int nr)
1629 {
1630 if (nr > vc->vc_cols - vc->vc_x)
1631 nr = vc->vc_cols - vc->vc_x;
1632 else if (!nr)
1633 nr = 1;
1634 delete_char(vc, nr);
1635 }
1636
1637 /* console_lock is held */
1638 static void csi_M(struct vc_data *vc, unsigned int nr)
1639 {
1640 if (nr > vc->vc_rows - vc->vc_y)
1641 nr = vc->vc_rows - vc->vc_y;
1642 else if (!nr)
1643 nr=1;
1644 con_scroll(vc, vc->vc_y, vc->vc_bottom, SM_UP, nr);
1645 vc->vc_need_wrap = 0;
1646 }
1647
1648 /* console_lock is held (except via vc_init->reset_terminal */
1649 static void save_cur(struct vc_data *vc)
1650 {
1651 vc->vc_saved_x = vc->vc_x;
1652 vc->vc_saved_y = vc->vc_y;
1653 vc->vc_s_intensity = vc->vc_intensity;
1654 vc->vc_s_italic = vc->vc_italic;
1655 vc->vc_s_underline = vc->vc_underline;
1656 vc->vc_s_blink = vc->vc_blink;
1657 vc->vc_s_reverse = vc->vc_reverse;
1658 vc->vc_s_charset = vc->vc_charset;
1659 vc->vc_s_color = vc->vc_color;
1660 vc->vc_saved_G0 = vc->vc_G0_charset;
1661 vc->vc_saved_G1 = vc->vc_G1_charset;
1662 }
1663
1664 /* console_lock is held */
1665 static void restore_cur(struct vc_data *vc)
1666 {
1667 gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y);
1668 vc->vc_intensity = vc->vc_s_intensity;
1669 vc->vc_italic = vc->vc_s_italic;
1670 vc->vc_underline = vc->vc_s_underline;
1671 vc->vc_blink = vc->vc_s_blink;
1672 vc->vc_reverse = vc->vc_s_reverse;
1673 vc->vc_charset = vc->vc_s_charset;
1674 vc->vc_color = vc->vc_s_color;
1675 vc->vc_G0_charset = vc->vc_saved_G0;
1676 vc->vc_G1_charset = vc->vc_saved_G1;
1677 vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc);
1678 update_attr(vc);
1679 vc->vc_need_wrap = 0;
1680 }
1681
1682 enum { ESnormal, ESesc, ESsquare, ESgetpars, ESfunckey,
1683 EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd,
1684 ESpalette, ESosc };
1685
1686 /* console_lock is held (except via vc_init()) */
1687 static void reset_terminal(struct vc_data *vc, int do_clear)
1688 {
1689 vc->vc_top = 0;
1690 vc->vc_bottom = vc->vc_rows;
1691 vc->vc_state = ESnormal;
1692 vc->vc_ques = 0;
1693 vc->vc_translate = set_translate(LAT1_MAP, vc);
1694 vc->vc_G0_charset = LAT1_MAP;
1695 vc->vc_G1_charset = GRAF_MAP;
1696 vc->vc_charset = 0;
1697 vc->vc_need_wrap = 0;
1698 vc->vc_report_mouse = 0;
1699 vc->vc_utf = default_utf8;
1700 vc->vc_utf_count = 0;
1701
1702 vc->vc_disp_ctrl = 0;
1703 vc->vc_toggle_meta = 0;
1704
1705 vc->vc_decscnm = 0;
1706 vc->vc_decom = 0;
1707 vc->vc_decawm = 1;
1708 vc->vc_deccm = global_cursor_default;
1709 vc->vc_decim = 0;
1710
1711 vt_reset_keyboard(vc->vc_num);
1712
1713 vc->vc_cursor_type = cur_default;
1714 vc->vc_complement_mask = vc->vc_s_complement_mask;
1715
1716 default_attr(vc);
1717 update_attr(vc);
1718
1719 vc->vc_tab_stop[0] = 0x01010100;
1720 vc->vc_tab_stop[1] =
1721 vc->vc_tab_stop[2] =
1722 vc->vc_tab_stop[3] =
1723 vc->vc_tab_stop[4] =
1724 vc->vc_tab_stop[5] =
1725 vc->vc_tab_stop[6] =
1726 vc->vc_tab_stop[7] = 0x01010101;
1727
1728 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1729 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1730 vc->vc_cur_blink_ms = DEFAULT_CURSOR_BLINK_MS;
1731
1732 gotoxy(vc, 0, 0);
1733 save_cur(vc);
1734 if (do_clear)
1735 csi_J(vc, 2);
1736 }
1737
1738 /* console_lock is held */
1739 static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
1740 {
1741 /*
1742 * Control characters can be used in the _middle_
1743 * of an escape sequence.
1744 */
1745 if (vc->vc_state == ESosc && c>=8 && c<=13) /* ... except for OSC */
1746 return;
1747 switch (c) {
1748 case 0:
1749 return;
1750 case 7:
1751 if (vc->vc_state == ESosc)
1752 vc->vc_state = ESnormal;
1753 else if (vc->vc_bell_duration)
1754 kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration);
1755 return;
1756 case 8:
1757 bs(vc);
1758 return;
1759 case 9:
1760 vc->vc_pos -= (vc->vc_x << 1);
1761 while (vc->vc_x < vc->vc_cols - 1) {
1762 vc->vc_x++;
1763 if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31)))
1764 break;
1765 }
1766 vc->vc_pos += (vc->vc_x << 1);
1767 notify_write(vc, '\t');
1768 return;
1769 case 10: case 11: case 12:
1770 lf(vc);
1771 if (!is_kbd(vc, lnm))
1772 return;
1773 case 13:
1774 cr(vc);
1775 return;
1776 case 14:
1777 vc->vc_charset = 1;
1778 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1779 vc->vc_disp_ctrl = 1;
1780 return;
1781 case 15:
1782 vc->vc_charset = 0;
1783 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1784 vc->vc_disp_ctrl = 0;
1785 return;
1786 case 24: case 26:
1787 vc->vc_state = ESnormal;
1788 return;
1789 case 27:
1790 vc->vc_state = ESesc;
1791 return;
1792 case 127:
1793 del(vc);
1794 return;
1795 case 128+27:
1796 vc->vc_state = ESsquare;
1797 return;
1798 }
1799 switch(vc->vc_state) {
1800 case ESesc:
1801 vc->vc_state = ESnormal;
1802 switch (c) {
1803 case '[':
1804 vc->vc_state = ESsquare;
1805 return;
1806 case ']':
1807 vc->vc_state = ESnonstd;
1808 return;
1809 case '%':
1810 vc->vc_state = ESpercent;
1811 return;
1812 case 'E':
1813 cr(vc);
1814 lf(vc);
1815 return;
1816 case 'M':
1817 ri(vc);
1818 return;
1819 case 'D':
1820 lf(vc);
1821 return;
1822 case 'H':
1823 vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31));
1824 return;
1825 case 'Z':
1826 respond_ID(tty);
1827 return;
1828 case '7':
1829 save_cur(vc);
1830 return;
1831 case '8':
1832 restore_cur(vc);
1833 return;
1834 case '(':
1835 vc->vc_state = ESsetG0;
1836 return;
1837 case ')':
1838 vc->vc_state = ESsetG1;
1839 return;
1840 case '#':
1841 vc->vc_state = EShash;
1842 return;
1843 case 'c':
1844 reset_terminal(vc, 1);
1845 return;
1846 case '>': /* Numeric keypad */
1847 clr_kbd(vc, kbdapplic);
1848 return;
1849 case '=': /* Appl. keypad */
1850 set_kbd(vc, kbdapplic);
1851 return;
1852 }
1853 return;
1854 case ESnonstd:
1855 if (c=='P') { /* palette escape sequence */
1856 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1857 vc->vc_par[vc->vc_npar] = 0;
1858 vc->vc_npar = 0;
1859 vc->vc_state = ESpalette;
1860 return;
1861 } else if (c=='R') { /* reset palette */
1862 reset_palette(vc);
1863 vc->vc_state = ESnormal;
1864 } else if (c>='0' && c<='9')
1865 vc->vc_state = ESosc;
1866 else
1867 vc->vc_state = ESnormal;
1868 return;
1869 case ESpalette:
1870 if (isxdigit(c)) {
1871 vc->vc_par[vc->vc_npar++] = hex_to_bin(c);
1872 if (vc->vc_npar == 7) {
1873 int i = vc->vc_par[0] * 3, j = 1;
1874 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1875 vc->vc_palette[i++] += vc->vc_par[j++];
1876 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1877 vc->vc_palette[i++] += vc->vc_par[j++];
1878 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1879 vc->vc_palette[i] += vc->vc_par[j];
1880 set_palette(vc);
1881 vc->vc_state = ESnormal;
1882 }
1883 } else
1884 vc->vc_state = ESnormal;
1885 return;
1886 case ESsquare:
1887 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1888 vc->vc_par[vc->vc_npar] = 0;
1889 vc->vc_npar = 0;
1890 vc->vc_state = ESgetpars;
1891 if (c == '[') { /* Function key */
1892 vc->vc_state=ESfunckey;
1893 return;
1894 }
1895 vc->vc_ques = (c == '?');
1896 if (vc->vc_ques)
1897 return;
1898 case ESgetpars:
1899 if (c == ';' && vc->vc_npar < NPAR - 1) {
1900 vc->vc_npar++;
1901 return;
1902 } else if (c>='0' && c<='9') {
1903 vc->vc_par[vc->vc_npar] *= 10;
1904 vc->vc_par[vc->vc_npar] += c - '0';
1905 return;
1906 }
1907 vc->vc_state = ESnormal;
1908 switch(c) {
1909 case 'h':
1910 set_mode(vc, 1);
1911 return;
1912 case 'l':
1913 set_mode(vc, 0);
1914 return;
1915 case 'c':
1916 if (vc->vc_ques) {
1917 if (vc->vc_par[0])
1918 vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16);
1919 else
1920 vc->vc_cursor_type = cur_default;
1921 return;
1922 }
1923 break;
1924 case 'm':
1925 if (vc->vc_ques) {
1926 clear_selection();
1927 if (vc->vc_par[0])
1928 vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1];
1929 else
1930 vc->vc_complement_mask = vc->vc_s_complement_mask;
1931 return;
1932 }
1933 break;
1934 case 'n':
1935 if (!vc->vc_ques) {
1936 if (vc->vc_par[0] == 5)
1937 status_report(tty);
1938 else if (vc->vc_par[0] == 6)
1939 cursor_report(vc, tty);
1940 }
1941 return;
1942 }
1943 if (vc->vc_ques) {
1944 vc->vc_ques = 0;
1945 return;
1946 }
1947 switch(c) {
1948 case 'G': case '`':
1949 if (vc->vc_par[0])
1950 vc->vc_par[0]--;
1951 gotoxy(vc, vc->vc_par[0], vc->vc_y);
1952 return;
1953 case 'A':
1954 if (!vc->vc_par[0])
1955 vc->vc_par[0]++;
1956 gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]);
1957 return;
1958 case 'B': case 'e':
1959 if (!vc->vc_par[0])
1960 vc->vc_par[0]++;
1961 gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]);
1962 return;
1963 case 'C': case 'a':
1964 if (!vc->vc_par[0])
1965 vc->vc_par[0]++;
1966 gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y);
1967 return;
1968 case 'D':
1969 if (!vc->vc_par[0])
1970 vc->vc_par[0]++;
1971 gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y);
1972 return;
1973 case 'E':
1974 if (!vc->vc_par[0])
1975 vc->vc_par[0]++;
1976 gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]);
1977 return;
1978 case 'F':
1979 if (!vc->vc_par[0])
1980 vc->vc_par[0]++;
1981 gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]);
1982 return;
1983 case 'd':
1984 if (vc->vc_par[0])
1985 vc->vc_par[0]--;
1986 gotoxay(vc, vc->vc_x ,vc->vc_par[0]);
1987 return;
1988 case 'H': case 'f':
1989 if (vc->vc_par[0])
1990 vc->vc_par[0]--;
1991 if (vc->vc_par[1])
1992 vc->vc_par[1]--;
1993 gotoxay(vc, vc->vc_par[1], vc->vc_par[0]);
1994 return;
1995 case 'J':
1996 csi_J(vc, vc->vc_par[0]);
1997 return;
1998 case 'K':
1999 csi_K(vc, vc->vc_par[0]);
2000 return;
2001 case 'L':
2002 csi_L(vc, vc->vc_par[0]);
2003 return;
2004 case 'M':
2005 csi_M(vc, vc->vc_par[0]);
2006 return;
2007 case 'P':
2008 csi_P(vc, vc->vc_par[0]);
2009 return;
2010 case 'c':
2011 if (!vc->vc_par[0])
2012 respond_ID(tty);
2013 return;
2014 case 'g':
2015 if (!vc->vc_par[0])
2016 vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31));
2017 else if (vc->vc_par[0] == 3) {
2018 vc->vc_tab_stop[0] =
2019 vc->vc_tab_stop[1] =
2020 vc->vc_tab_stop[2] =
2021 vc->vc_tab_stop[3] =
2022 vc->vc_tab_stop[4] =
2023 vc->vc_tab_stop[5] =
2024 vc->vc_tab_stop[6] =
2025 vc->vc_tab_stop[7] = 0;
2026 }
2027 return;
2028 case 'm':
2029 csi_m(vc);
2030 return;
2031 case 'q': /* DECLL - but only 3 leds */
2032 /* map 0,1,2,3 to 0,1,2,4 */
2033 if (vc->vc_par[0] < 4)
2034 vt_set_led_state(vc->vc_num,
2035 (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4);
2036 return;
2037 case 'r':
2038 if (!vc->vc_par[0])
2039 vc->vc_par[0]++;
2040 if (!vc->vc_par[1])
2041 vc->vc_par[1] = vc->vc_rows;
2042 /* Minimum allowed region is 2 lines */
2043 if (vc->vc_par[0] < vc->vc_par[1] &&
2044 vc->vc_par[1] <= vc->vc_rows) {
2045 vc->vc_top = vc->vc_par[0] - 1;
2046 vc->vc_bottom = vc->vc_par[1];
2047 gotoxay(vc, 0, 0);
2048 }
2049 return;
2050 case 's':
2051 save_cur(vc);
2052 return;
2053 case 'u':
2054 restore_cur(vc);
2055 return;
2056 case 'X':
2057 csi_X(vc, vc->vc_par[0]);
2058 return;
2059 case '@':
2060 csi_at(vc, vc->vc_par[0]);
2061 return;
2062 case ']': /* setterm functions */
2063 setterm_command(vc);
2064 return;
2065 }
2066 return;
2067 case ESpercent:
2068 vc->vc_state = ESnormal;
2069 switch (c) {
2070 case '@': /* defined in ISO 2022 */
2071 vc->vc_utf = 0;
2072 return;
2073 case 'G': /* prelim official escape code */
2074 case '8': /* retained for compatibility */
2075 vc->vc_utf = 1;
2076 return;
2077 }
2078 return;
2079 case ESfunckey:
2080 vc->vc_state = ESnormal;
2081 return;
2082 case EShash:
2083 vc->vc_state = ESnormal;
2084 if (c == '8') {
2085 /* DEC screen alignment test. kludge :-) */
2086 vc->vc_video_erase_char =
2087 (vc->vc_video_erase_char & 0xff00) | 'E';
2088 csi_J(vc, 2);
2089 vc->vc_video_erase_char =
2090 (vc->vc_video_erase_char & 0xff00) | ' ';
2091 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
2092 }
2093 return;
2094 case ESsetG0:
2095 if (c == '0')
2096 vc->vc_G0_charset = GRAF_MAP;
2097 else if (c == 'B')
2098 vc->vc_G0_charset = LAT1_MAP;
2099 else if (c == 'U')
2100 vc->vc_G0_charset = IBMPC_MAP;
2101 else if (c == 'K')
2102 vc->vc_G0_charset = USER_MAP;
2103 if (vc->vc_charset == 0)
2104 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
2105 vc->vc_state = ESnormal;
2106 return;
2107 case ESsetG1:
2108 if (c == '0')
2109 vc->vc_G1_charset = GRAF_MAP;
2110 else if (c == 'B')
2111 vc->vc_G1_charset = LAT1_MAP;
2112 else if (c == 'U')
2113 vc->vc_G1_charset = IBMPC_MAP;
2114 else if (c == 'K')
2115 vc->vc_G1_charset = USER_MAP;
2116 if (vc->vc_charset == 1)
2117 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
2118 vc->vc_state = ESnormal;
2119 return;
2120 case ESosc:
2121 return;
2122 default:
2123 vc->vc_state = ESnormal;
2124 }
2125 }
2126
2127 /* is_double_width() is based on the wcwidth() implementation by
2128 * Markus Kuhn -- 2007-05-26 (Unicode 5.0)
2129 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
2130 */
2131 struct interval {
2132 uint32_t first;
2133 uint32_t last;
2134 };
2135
2136 static int bisearch(uint32_t ucs, const struct interval *table, int max)
2137 {
2138 int min = 0;
2139 int mid;
2140
2141 if (ucs < table[0].first || ucs > table[max].last)
2142 return 0;
2143 while (max >= min) {
2144 mid = (min + max) / 2;
2145 if (ucs > table[mid].last)
2146 min = mid + 1;
2147 else if (ucs < table[mid].first)
2148 max = mid - 1;
2149 else
2150 return 1;
2151 }
2152 return 0;
2153 }
2154
2155 static int is_double_width(uint32_t ucs)
2156 {
2157 static const struct interval double_width[] = {
2158 { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E },
2159 { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF },
2160 { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 },
2161 { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD }
2162 };
2163 return bisearch(ucs, double_width, ARRAY_SIZE(double_width) - 1);
2164 }
2165
2166 static void con_flush(struct vc_data *vc, unsigned long draw_from,
2167 unsigned long draw_to, int *draw_x)
2168 {
2169 if (*draw_x < 0)
2170 return;
2171
2172 vc->vc_sw->con_putcs(vc, (u16 *)draw_from,
2173 (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, *draw_x);
2174 *draw_x = -1;
2175 }
2176
2177 /* acquires console_lock */
2178 static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2179 {
2180 int c, tc, ok, n = 0, draw_x = -1;
2181 unsigned int currcons;
2182 unsigned long draw_from = 0, draw_to = 0;
2183 struct vc_data *vc;
2184 unsigned char vc_attr;
2185 struct vt_notifier_param param;
2186 uint8_t rescan;
2187 uint8_t inverse;
2188 uint8_t width;
2189 u16 himask, charmask;
2190
2191 if (in_interrupt())
2192 return count;
2193
2194 might_sleep();
2195
2196 console_lock();
2197 vc = tty->driver_data;
2198 if (vc == NULL) {
2199 printk(KERN_ERR "vt: argh, driver_data is NULL !\n");
2200 console_unlock();
2201 return 0;
2202 }
2203
2204 currcons = vc->vc_num;
2205 if (!vc_cons_allocated(currcons)) {
2206 /* could this happen? */
2207 pr_warn_once("con_write: tty %d not allocated\n", currcons+1);
2208 console_unlock();
2209 return 0;
2210 }
2211
2212 himask = vc->vc_hi_font_mask;
2213 charmask = himask ? 0x1ff : 0xff;
2214
2215 /* undraw cursor first */
2216 if (con_is_fg(vc))
2217 hide_cursor(vc);
2218
2219 param.vc = vc;
2220
2221 while (!tty->stopped && count) {
2222 int orig = *buf;
2223 c = orig;
2224 buf++;
2225 n++;
2226 count--;
2227 rescan = 0;
2228 inverse = 0;
2229 width = 1;
2230
2231 /* Do no translation at all in control states */
2232 if (vc->vc_state != ESnormal) {
2233 tc = c;
2234 } else if (vc->vc_utf && !vc->vc_disp_ctrl) {
2235 /* Combine UTF-8 into Unicode in vc_utf_char.
2236 * vc_utf_count is the number of continuation bytes still
2237 * expected to arrive.
2238 * vc_npar is the number of continuation bytes arrived so
2239 * far
2240 */
2241 rescan_last_byte:
2242 if ((c & 0xc0) == 0x80) {
2243 /* Continuation byte received */
2244 static const uint32_t utf8_length_changes[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff };
2245 if (vc->vc_utf_count) {
2246 vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f);
2247 vc->vc_npar++;
2248 if (--vc->vc_utf_count) {
2249 /* Still need some bytes */
2250 continue;
2251 }
2252 /* Got a whole character */
2253 c = vc->vc_utf_char;
2254 /* Reject overlong sequences */
2255 if (c <= utf8_length_changes[vc->vc_npar - 1] ||
2256 c > utf8_length_changes[vc->vc_npar])
2257 c = 0xfffd;
2258 } else {
2259 /* Unexpected continuation byte */
2260 vc->vc_utf_count = 0;
2261 c = 0xfffd;
2262 }
2263 } else {
2264 /* Single ASCII byte or first byte of a sequence received */
2265 if (vc->vc_utf_count) {
2266 /* Continuation byte expected */
2267 rescan = 1;
2268 vc->vc_utf_count = 0;
2269 c = 0xfffd;
2270 } else if (c > 0x7f) {
2271 /* First byte of a multibyte sequence received */
2272 vc->vc_npar = 0;
2273 if ((c & 0xe0) == 0xc0) {
2274 vc->vc_utf_count = 1;
2275 vc->vc_utf_char = (c & 0x1f);
2276 } else if ((c & 0xf0) == 0xe0) {
2277 vc->vc_utf_count = 2;
2278 vc->vc_utf_char = (c & 0x0f);
2279 } else if ((c & 0xf8) == 0xf0) {
2280 vc->vc_utf_count = 3;
2281 vc->vc_utf_char = (c & 0x07);
2282 } else if ((c & 0xfc) == 0xf8) {
2283 vc->vc_utf_count = 4;
2284 vc->vc_utf_char = (c & 0x03);
2285 } else if ((c & 0xfe) == 0xfc) {
2286 vc->vc_utf_count = 5;
2287 vc->vc_utf_char = (c & 0x01);
2288 } else {
2289 /* 254 and 255 are invalid */
2290 c = 0xfffd;
2291 }
2292 if (vc->vc_utf_count) {
2293 /* Still need some bytes */
2294 continue;
2295 }
2296 }
2297 /* Nothing to do if an ASCII byte was received */
2298 }
2299 /* End of UTF-8 decoding. */
2300 /* c is the received character, or U+FFFD for invalid sequences. */
2301 /* Replace invalid Unicode code points with U+FFFD too */
2302 if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff)
2303 c = 0xfffd;
2304 tc = c;
2305 } else { /* no utf or alternate charset mode */
2306 tc = vc_translate(vc, c);
2307 }
2308
2309 param.c = tc;
2310 if (atomic_notifier_call_chain(&vt_notifier_list, VT_PREWRITE,
2311 &param) == NOTIFY_STOP)
2312 continue;
2313
2314 /* If the original code was a control character we
2315 * only allow a glyph to be displayed if the code is
2316 * not normally used (such as for cursor movement) or
2317 * if the disp_ctrl mode has been explicitly enabled.
2318 * Certain characters (as given by the CTRL_ALWAYS
2319 * bitmap) are always displayed as control characters,
2320 * as the console would be pretty useless without
2321 * them; to display an arbitrary font position use the
2322 * direct-to-font zone in UTF-8 mode.
2323 */
2324 ok = tc && (c >= 32 ||
2325 !(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 :
2326 vc->vc_utf || ((CTRL_ACTION >> c) & 1)))
2327 && (c != 127 || vc->vc_disp_ctrl)
2328 && (c != 128+27);
2329
2330 if (vc->vc_state == ESnormal && ok) {
2331 if (vc->vc_utf && !vc->vc_disp_ctrl) {
2332 if (is_double_width(c))
2333 width = 2;
2334 }
2335 /* Now try to find out how to display it */
2336 tc = conv_uni_to_pc(vc, tc);
2337 if (tc & ~charmask) {
2338 if (tc == -1 || tc == -2) {
2339 continue; /* nothing to display */
2340 }
2341 /* Glyph not found */
2342 if ((!(vc->vc_utf && !vc->vc_disp_ctrl) || c < 128) && !(c & ~charmask)) {
2343 /* In legacy mode use the glyph we get by a 1:1 mapping.
2344 This would make absolutely no sense with Unicode in mind,
2345 but do this for ASCII characters since a font may lack
2346 Unicode mapping info and we don't want to end up with
2347 having question marks only. */
2348 tc = c;
2349 } else {
2350 /* Display U+FFFD. If it's not found, display an inverse question mark. */
2351 tc = conv_uni_to_pc(vc, 0xfffd);
2352 if (tc < 0) {
2353 inverse = 1;
2354 tc = conv_uni_to_pc(vc, '?');
2355 if (tc < 0) tc = '?';
2356 }
2357 }
2358 }
2359
2360 if (!inverse) {
2361 vc_attr = vc->vc_attr;
2362 } else {
2363 /* invert vc_attr */
2364 if (!vc->vc_can_do_color) {
2365 vc_attr = (vc->vc_attr) ^ 0x08;
2366 } else if (vc->vc_hi_font_mask == 0x100) {
2367 vc_attr = ((vc->vc_attr) & 0x11) | (((vc->vc_attr) & 0xe0) >> 4) | (((vc->vc_attr) & 0x0e) << 4);
2368 } else {
2369 vc_attr = ((vc->vc_attr) & 0x88) | (((vc->vc_attr) & 0x70) >> 4) | (((vc->vc_attr) & 0x07) << 4);
2370 }
2371 con_flush(vc, draw_from, draw_to, &draw_x);
2372 }
2373
2374 while (1) {
2375 if (vc->vc_need_wrap || vc->vc_decim)
2376 con_flush(vc, draw_from, draw_to,
2377 &draw_x);
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 (con_should_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 con_flush(vc, draw_from, draw_to, &draw_x);
2409
2410 if (rescan) {
2411 rescan = 0;
2412 inverse = 0;
2413 width = 1;
2414 c = orig;
2415 goto rescan_last_byte;
2416 }
2417 continue;
2418 }
2419 con_flush(vc, draw_from, draw_to, &draw_x);
2420 do_con_trol(tty, vc, orig);
2421 }
2422 con_flush(vc, draw_from, draw_to, &draw_x);
2423 console_conditional_schedule();
2424 console_unlock();
2425 notify_update(vc);
2426 return n;
2427 }
2428
2429 /*
2430 * This is the console switching callback.
2431 *
2432 * Doing console switching in a process context allows
2433 * us to do the switches asynchronously (needed when we want
2434 * to switch due to a keyboard interrupt). Synchronization
2435 * with other console code and prevention of re-entrancy is
2436 * ensured with console_lock.
2437 */
2438 static void console_callback(struct work_struct *ignored)
2439 {
2440 console_lock();
2441
2442 if (want_console >= 0) {
2443 if (want_console != fg_console &&
2444 vc_cons_allocated(want_console)) {
2445 hide_cursor(vc_cons[fg_console].d);
2446 change_console(vc_cons[want_console].d);
2447 /* we only changed when the console had already
2448 been allocated - a new console is not created
2449 in an interrupt routine */
2450 }
2451 want_console = -1;
2452 }
2453 if (do_poke_blanked_console) { /* do not unblank for a LED change */
2454 do_poke_blanked_console = 0;
2455 poke_blanked_console();
2456 }
2457 if (scrollback_delta) {
2458 struct vc_data *vc = vc_cons[fg_console].d;
2459 clear_selection();
2460 if (vc->vc_mode == KD_TEXT && vc->vc_sw->con_scrolldelta)
2461 vc->vc_sw->con_scrolldelta(vc, scrollback_delta);
2462 scrollback_delta = 0;
2463 }
2464 if (blank_timer_expired) {
2465 do_blank_screen(0);
2466 blank_timer_expired = 0;
2467 }
2468 notify_update(vc_cons[fg_console].d);
2469
2470 console_unlock();
2471 }
2472
2473 int set_console(int nr)
2474 {
2475 struct vc_data *vc = vc_cons[fg_console].d;
2476
2477 if (!vc_cons_allocated(nr) || vt_dont_switch ||
2478 (vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) {
2479
2480 /*
2481 * Console switch will fail in console_callback() or
2482 * change_console() so there is no point scheduling
2483 * the callback
2484 *
2485 * Existing set_console() users don't check the return
2486 * value so this shouldn't break anything
2487 */
2488 return -EINVAL;
2489 }
2490
2491 want_console = nr;
2492 schedule_console_callback();
2493
2494 return 0;
2495 }
2496
2497 struct tty_driver *console_driver;
2498
2499 #ifdef CONFIG_VT_CONSOLE
2500
2501 /**
2502 * vt_kmsg_redirect() - Sets/gets the kernel message console
2503 * @new: The new virtual terminal number or -1 if the console should stay
2504 * unchanged
2505 *
2506 * By default, the kernel messages are always printed on the current virtual
2507 * console. However, the user may modify that default with the
2508 * TIOCL_SETKMSGREDIRECT ioctl call.
2509 *
2510 * This function sets the kernel message console to be @new. It returns the old
2511 * virtual console number. The virtual terminal number 0 (both as parameter and
2512 * return value) means no redirection (i.e. always printed on the currently
2513 * active console).
2514 *
2515 * The parameter -1 means that only the current console is returned, but the
2516 * value is not modified. You may use the macro vt_get_kmsg_redirect() in that
2517 * case to make the code more understandable.
2518 *
2519 * When the kernel is compiled without CONFIG_VT_CONSOLE, this function ignores
2520 * the parameter and always returns 0.
2521 */
2522 int vt_kmsg_redirect(int new)
2523 {
2524 static int kmsg_con;
2525
2526 if (new != -1)
2527 return xchg(&kmsg_con, new);
2528 else
2529 return kmsg_con;
2530 }
2531
2532 /*
2533 * Console on virtual terminal
2534 *
2535 * The console must be locked when we get here.
2536 */
2537
2538 static void vt_console_print(struct console *co, const char *b, unsigned count)
2539 {
2540 struct vc_data *vc = vc_cons[fg_console].d;
2541 unsigned char c;
2542 static DEFINE_SPINLOCK(printing_lock);
2543 const ushort *start;
2544 ushort cnt = 0;
2545 ushort myx;
2546 int kmsg_console;
2547
2548 /* console busy or not yet initialized */
2549 if (!printable)
2550 return;
2551 if (!spin_trylock(&printing_lock))
2552 return;
2553
2554 kmsg_console = vt_get_kmsg_redirect();
2555 if (kmsg_console && vc_cons_allocated(kmsg_console - 1))
2556 vc = vc_cons[kmsg_console - 1].d;
2557
2558 /* read `x' only after setting currcons properly (otherwise
2559 the `x' macro will read the x of the foreground console). */
2560 myx = vc->vc_x;
2561
2562 if (!vc_cons_allocated(fg_console)) {
2563 /* impossible */
2564 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2565 goto quit;
2566 }
2567
2568 if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc))
2569 goto quit;
2570
2571 /* undraw cursor first */
2572 if (con_is_fg(vc))
2573 hide_cursor(vc);
2574
2575 start = (ushort *)vc->vc_pos;
2576
2577 /* Contrived structure to try to emulate original need_wrap behaviour
2578 * Problems caused when we have need_wrap set on '\n' character */
2579 while (count--) {
2580 c = *b++;
2581 if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) {
2582 if (cnt > 0) {
2583 if (con_is_visible(vc))
2584 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2585 vc->vc_x += cnt;
2586 if (vc->vc_need_wrap)
2587 vc->vc_x--;
2588 cnt = 0;
2589 }
2590 if (c == 8) { /* backspace */
2591 bs(vc);
2592 start = (ushort *)vc->vc_pos;
2593 myx = vc->vc_x;
2594 continue;
2595 }
2596 if (c != 13)
2597 lf(vc);
2598 cr(vc);
2599 start = (ushort *)vc->vc_pos;
2600 myx = vc->vc_x;
2601 if (c == 10 || c == 13)
2602 continue;
2603 }
2604 scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos);
2605 notify_write(vc, c);
2606 cnt++;
2607 if (myx == vc->vc_cols - 1) {
2608 vc->vc_need_wrap = 1;
2609 continue;
2610 }
2611 vc->vc_pos += 2;
2612 myx++;
2613 }
2614 if (cnt > 0) {
2615 if (con_is_visible(vc))
2616 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2617 vc->vc_x += cnt;
2618 if (vc->vc_x == vc->vc_cols) {
2619 vc->vc_x--;
2620 vc->vc_need_wrap = 1;
2621 }
2622 }
2623 set_cursor(vc);
2624 notify_update(vc);
2625
2626 quit:
2627 spin_unlock(&printing_lock);
2628 }
2629
2630 static struct tty_driver *vt_console_device(struct console *c, int *index)
2631 {
2632 *index = c->index ? c->index-1 : fg_console;
2633 return console_driver;
2634 }
2635
2636 static struct console vt_console_driver = {
2637 .name = "tty",
2638 .write = vt_console_print,
2639 .device = vt_console_device,
2640 .unblank = unblank_screen,
2641 .flags = CON_PRINTBUFFER,
2642 .index = -1,
2643 };
2644 #endif
2645
2646 /*
2647 * Handling of Linux-specific VC ioctls
2648 */
2649
2650 /*
2651 * Generally a bit racy with respect to console_lock();.
2652 *
2653 * There are some functions which don't need it.
2654 *
2655 * There are some functions which can sleep for arbitrary periods
2656 * (paste_selection) but we don't need the lock there anyway.
2657 *
2658 * set_selection has locking, and definitely needs it
2659 */
2660
2661 int tioclinux(struct tty_struct *tty, unsigned long arg)
2662 {
2663 char type, data;
2664 char __user *p = (char __user *)arg;
2665 int lines;
2666 int ret;
2667
2668 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN))
2669 return -EPERM;
2670 if (get_user(type, p))
2671 return -EFAULT;
2672 ret = 0;
2673
2674 switch (type)
2675 {
2676 case TIOCL_SETSEL:
2677 console_lock();
2678 ret = set_selection((struct tiocl_selection __user *)(p+1), tty);
2679 console_unlock();
2680 break;
2681 case TIOCL_PASTESEL:
2682 ret = paste_selection(tty);
2683 break;
2684 case TIOCL_UNBLANKSCREEN:
2685 console_lock();
2686 unblank_screen();
2687 console_unlock();
2688 break;
2689 case TIOCL_SELLOADLUT:
2690 console_lock();
2691 ret = sel_loadlut(p);
2692 console_unlock();
2693 break;
2694 case TIOCL_GETSHIFTSTATE:
2695
2696 /*
2697 * Make it possible to react to Shift+Mousebutton.
2698 * Note that 'shift_state' is an undocumented
2699 * kernel-internal variable; programs not closely
2700 * related to the kernel should not use this.
2701 */
2702 data = vt_get_shift_state();
2703 ret = __put_user(data, p);
2704 break;
2705 case TIOCL_GETMOUSEREPORTING:
2706 console_lock(); /* May be overkill */
2707 data = mouse_reporting();
2708 console_unlock();
2709 ret = __put_user(data, p);
2710 break;
2711 case TIOCL_SETVESABLANK:
2712 console_lock();
2713 ret = set_vesa_blanking(p);
2714 console_unlock();
2715 break;
2716 case TIOCL_GETKMSGREDIRECT:
2717 data = vt_get_kmsg_redirect();
2718 ret = __put_user(data, p);
2719 break;
2720 case TIOCL_SETKMSGREDIRECT:
2721 if (!capable(CAP_SYS_ADMIN)) {
2722 ret = -EPERM;
2723 } else {
2724 if (get_user(data, p+1))
2725 ret = -EFAULT;
2726 else
2727 vt_kmsg_redirect(data);
2728 }
2729 break;
2730 case TIOCL_GETFGCONSOLE:
2731 /* No locking needed as this is a transiently
2732 correct return anyway if the caller hasn't
2733 disabled switching */
2734 ret = fg_console;
2735 break;
2736 case TIOCL_SCROLLCONSOLE:
2737 if (get_user(lines, (s32 __user *)(p+4))) {
2738 ret = -EFAULT;
2739 } else {
2740 /* Need the console lock here. Note that lots
2741 of other calls need fixing before the lock
2742 is actually useful ! */
2743 console_lock();
2744 scrollfront(vc_cons[fg_console].d, lines);
2745 console_unlock();
2746 ret = 0;
2747 }
2748 break;
2749 case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
2750 console_lock();
2751 ignore_poke = 1;
2752 do_blank_screen(0);
2753 console_unlock();
2754 break;
2755 case TIOCL_BLANKEDSCREEN:
2756 ret = console_blanked;
2757 break;
2758 default:
2759 ret = -EINVAL;
2760 break;
2761 }
2762 return ret;
2763 }
2764
2765 /*
2766 * /dev/ttyN handling
2767 */
2768
2769 static int con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2770 {
2771 int retval;
2772
2773 retval = do_con_write(tty, buf, count);
2774 con_flush_chars(tty);
2775
2776 return retval;
2777 }
2778
2779 static int con_put_char(struct tty_struct *tty, unsigned char ch)
2780 {
2781 if (in_interrupt())
2782 return 0; /* n_r3964 calls put_char() from interrupt context */
2783 return do_con_write(tty, &ch, 1);
2784 }
2785
2786 static int con_write_room(struct tty_struct *tty)
2787 {
2788 if (tty->stopped)
2789 return 0;
2790 return 32768; /* No limit, really; we're not buffering */
2791 }
2792
2793 static int con_chars_in_buffer(struct tty_struct *tty)
2794 {
2795 return 0; /* we're not buffering */
2796 }
2797
2798 /*
2799 * con_throttle and con_unthrottle are only used for
2800 * paste_selection(), which has to stuff in a large number of
2801 * characters...
2802 */
2803 static void con_throttle(struct tty_struct *tty)
2804 {
2805 }
2806
2807 static void con_unthrottle(struct tty_struct *tty)
2808 {
2809 struct vc_data *vc = tty->driver_data;
2810
2811 wake_up_interruptible(&vc->paste_wait);
2812 }
2813
2814 /*
2815 * Turn the Scroll-Lock LED on when the tty is stopped
2816 */
2817 static void con_stop(struct tty_struct *tty)
2818 {
2819 int console_num;
2820 if (!tty)
2821 return;
2822 console_num = tty->index;
2823 if (!vc_cons_allocated(console_num))
2824 return;
2825 vt_kbd_con_stop(console_num);
2826 }
2827
2828 /*
2829 * Turn the Scroll-Lock LED off when the console is started
2830 */
2831 static void con_start(struct tty_struct *tty)
2832 {
2833 int console_num;
2834 if (!tty)
2835 return;
2836 console_num = tty->index;
2837 if (!vc_cons_allocated(console_num))
2838 return;
2839 vt_kbd_con_start(console_num);
2840 }
2841
2842 static void con_flush_chars(struct tty_struct *tty)
2843 {
2844 struct vc_data *vc;
2845
2846 if (in_interrupt()) /* from flush_to_ldisc */
2847 return;
2848
2849 /* if we race with con_close(), vt may be null */
2850 console_lock();
2851 vc = tty->driver_data;
2852 if (vc)
2853 set_cursor(vc);
2854 console_unlock();
2855 }
2856
2857 /*
2858 * Allocate the console screen memory.
2859 */
2860 static int con_install(struct tty_driver *driver, struct tty_struct *tty)
2861 {
2862 unsigned int currcons = tty->index;
2863 struct vc_data *vc;
2864 int ret;
2865
2866 console_lock();
2867 ret = vc_allocate(currcons);
2868 if (ret)
2869 goto unlock;
2870
2871 vc = vc_cons[currcons].d;
2872
2873 /* Still being freed */
2874 if (vc->port.tty) {
2875 ret = -ERESTARTSYS;
2876 goto unlock;
2877 }
2878
2879 ret = tty_port_install(&vc->port, driver, tty);
2880 if (ret)
2881 goto unlock;
2882
2883 tty->driver_data = vc;
2884 vc->port.tty = tty;
2885
2886 if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
2887 tty->winsize.ws_row = vc_cons[currcons].d->vc_rows;
2888 tty->winsize.ws_col = vc_cons[currcons].d->vc_cols;
2889 }
2890 if (vc->vc_utf)
2891 tty->termios.c_iflag |= IUTF8;
2892 else
2893 tty->termios.c_iflag &= ~IUTF8;
2894 unlock:
2895 console_unlock();
2896 return ret;
2897 }
2898
2899 static int con_open(struct tty_struct *tty, struct file *filp)
2900 {
2901 /* everything done in install */
2902 return 0;
2903 }
2904
2905
2906 static void con_close(struct tty_struct *tty, struct file *filp)
2907 {
2908 /* Nothing to do - we defer to shutdown */
2909 }
2910
2911 static void con_shutdown(struct tty_struct *tty)
2912 {
2913 struct vc_data *vc = tty->driver_data;
2914 BUG_ON(vc == NULL);
2915 console_lock();
2916 vc->port.tty = NULL;
2917 console_unlock();
2918 }
2919
2920 static int default_color = 7; /* white */
2921 static int default_italic_color = 2; // green (ASCII)
2922 static int default_underline_color = 3; // cyan (ASCII)
2923 module_param_named(color, default_color, int, S_IRUGO | S_IWUSR);
2924 module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR);
2925 module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR);
2926
2927 static void vc_init(struct vc_data *vc, unsigned int rows,
2928 unsigned int cols, int do_clear)
2929 {
2930 int j, k ;
2931
2932 vc->vc_cols = cols;
2933 vc->vc_rows = rows;
2934 vc->vc_size_row = cols << 1;
2935 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
2936
2937 set_origin(vc);
2938 vc->vc_pos = vc->vc_origin;
2939 reset_vc(vc);
2940 for (j=k=0; j<16; j++) {
2941 vc->vc_palette[k++] = default_red[j] ;
2942 vc->vc_palette[k++] = default_grn[j] ;
2943 vc->vc_palette[k++] = default_blu[j] ;
2944 }
2945 vc->vc_def_color = default_color;
2946 vc->vc_ulcolor = default_underline_color;
2947 vc->vc_itcolor = default_italic_color;
2948 vc->vc_halfcolor = 0x08; /* grey */
2949 init_waitqueue_head(&vc->paste_wait);
2950 reset_terminal(vc, do_clear);
2951 }
2952
2953 /*
2954 * This routine initializes console interrupts, and does nothing
2955 * else. If you want the screen to clear, call tty_write with
2956 * the appropriate escape-sequence.
2957 */
2958
2959 static int __init con_init(void)
2960 {
2961 const char *display_desc = NULL;
2962 struct vc_data *vc;
2963 unsigned int currcons = 0, i;
2964
2965 console_lock();
2966
2967 if (conswitchp)
2968 display_desc = conswitchp->con_startup();
2969 if (!display_desc) {
2970 fg_console = 0;
2971 console_unlock();
2972 return 0;
2973 }
2974
2975 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2976 struct con_driver *con_driver = &registered_con_driver[i];
2977
2978 if (con_driver->con == NULL) {
2979 con_driver->con = conswitchp;
2980 con_driver->desc = display_desc;
2981 con_driver->flag = CON_DRIVER_FLAG_INIT;
2982 con_driver->first = 0;
2983 con_driver->last = MAX_NR_CONSOLES - 1;
2984 break;
2985 }
2986 }
2987
2988 for (i = 0; i < MAX_NR_CONSOLES; i++)
2989 con_driver_map[i] = conswitchp;
2990
2991 if (blankinterval) {
2992 blank_state = blank_normal_wait;
2993 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
2994 }
2995
2996 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) {
2997 vc_cons[currcons].d = vc = kzalloc(sizeof(struct vc_data), GFP_NOWAIT);
2998 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
2999 tty_port_init(&vc->port);
3000 visual_init(vc, currcons, 1);
3001 vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_NOWAIT);
3002 vc_init(vc, vc->vc_rows, vc->vc_cols,
3003 currcons || !vc->vc_sw->con_save_screen);
3004 }
3005 currcons = fg_console = 0;
3006 master_display_fg = vc = vc_cons[currcons].d;
3007 set_origin(vc);
3008 save_screen(vc);
3009 gotoxy(vc, vc->vc_x, vc->vc_y);
3010 csi_J(vc, 0);
3011 update_screen(vc);
3012 pr_info("Console: %s %s %dx%d\n",
3013 vc->vc_can_do_color ? "colour" : "mono",
3014 display_desc, vc->vc_cols, vc->vc_rows);
3015 printable = 1;
3016
3017 console_unlock();
3018
3019 #ifdef CONFIG_VT_CONSOLE
3020 register_console(&vt_console_driver);
3021 #endif
3022 return 0;
3023 }
3024 console_initcall(con_init);
3025
3026 static const struct tty_operations con_ops = {
3027 .install = con_install,
3028 .open = con_open,
3029 .close = con_close,
3030 .write = con_write,
3031 .write_room = con_write_room,
3032 .put_char = con_put_char,
3033 .flush_chars = con_flush_chars,
3034 .chars_in_buffer = con_chars_in_buffer,
3035 .ioctl = vt_ioctl,
3036 #ifdef CONFIG_COMPAT
3037 .compat_ioctl = vt_compat_ioctl,
3038 #endif
3039 .stop = con_stop,
3040 .start = con_start,
3041 .throttle = con_throttle,
3042 .unthrottle = con_unthrottle,
3043 .resize = vt_resize,
3044 .shutdown = con_shutdown
3045 };
3046
3047 static struct cdev vc0_cdev;
3048
3049 static ssize_t show_tty_active(struct device *dev,
3050 struct device_attribute *attr, char *buf)
3051 {
3052 return sprintf(buf, "tty%d\n", fg_console + 1);
3053 }
3054 static DEVICE_ATTR(active, S_IRUGO, show_tty_active, NULL);
3055
3056 static struct attribute *vt_dev_attrs[] = {
3057 &dev_attr_active.attr,
3058 NULL
3059 };
3060
3061 ATTRIBUTE_GROUPS(vt_dev);
3062
3063 int __init vty_init(const struct file_operations *console_fops)
3064 {
3065 cdev_init(&vc0_cdev, console_fops);
3066 if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) ||
3067 register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0)
3068 panic("Couldn't register /dev/tty0 driver\n");
3069 tty0dev = device_create_with_groups(tty_class, NULL,
3070 MKDEV(TTY_MAJOR, 0), NULL,
3071 vt_dev_groups, "tty0");
3072 if (IS_ERR(tty0dev))
3073 tty0dev = NULL;
3074
3075 vcs_init();
3076
3077 console_driver = alloc_tty_driver(MAX_NR_CONSOLES);
3078 if (!console_driver)
3079 panic("Couldn't allocate console driver\n");
3080
3081 console_driver->name = "tty";
3082 console_driver->name_base = 1;
3083 console_driver->major = TTY_MAJOR;
3084 console_driver->minor_start = 1;
3085 console_driver->type = TTY_DRIVER_TYPE_CONSOLE;
3086 console_driver->init_termios = tty_std_termios;
3087 if (default_utf8)
3088 console_driver->init_termios.c_iflag |= IUTF8;
3089 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS;
3090 tty_set_operations(console_driver, &con_ops);
3091 if (tty_register_driver(console_driver))
3092 panic("Couldn't register console driver\n");
3093 kbd_init();
3094 console_map_init();
3095 #ifdef CONFIG_MDA_CONSOLE
3096 mda_console_init();
3097 #endif
3098 return 0;
3099 }
3100
3101 #ifndef VT_SINGLE_DRIVER
3102
3103 static struct class *vtconsole_class;
3104
3105 static int do_bind_con_driver(const struct consw *csw, int first, int last,
3106 int deflt)
3107 {
3108 struct module *owner = csw->owner;
3109 const char *desc = NULL;
3110 struct con_driver *con_driver;
3111 int i, j = -1, k = -1, retval = -ENODEV;
3112
3113 if (!try_module_get(owner))
3114 return -ENODEV;
3115
3116 WARN_CONSOLE_UNLOCKED();
3117
3118 /* check if driver is registered */
3119 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3120 con_driver = &registered_con_driver[i];
3121
3122 if (con_driver->con == csw) {
3123 desc = con_driver->desc;
3124 retval = 0;
3125 break;
3126 }
3127 }
3128
3129 if (retval)
3130 goto err;
3131
3132 if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) {
3133 csw->con_startup();
3134 con_driver->flag |= CON_DRIVER_FLAG_INIT;
3135 }
3136
3137 if (deflt) {
3138 if (conswitchp)
3139 module_put(conswitchp->owner);
3140
3141 __module_get(owner);
3142 conswitchp = csw;
3143 }
3144
3145 first = max(first, con_driver->first);
3146 last = min(last, con_driver->last);
3147
3148 for (i = first; i <= last; i++) {
3149 int old_was_color;
3150 struct vc_data *vc = vc_cons[i].d;
3151
3152 if (con_driver_map[i])
3153 module_put(con_driver_map[i]->owner);
3154 __module_get(owner);
3155 con_driver_map[i] = csw;
3156
3157 if (!vc || !vc->vc_sw)
3158 continue;
3159
3160 j = i;
3161
3162 if (con_is_visible(vc)) {
3163 k = i;
3164 save_screen(vc);
3165 }
3166
3167 old_was_color = vc->vc_can_do_color;
3168 vc->vc_sw->con_deinit(vc);
3169 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
3170 visual_init(vc, i, 0);
3171 set_origin(vc);
3172 update_attr(vc);
3173
3174 /* If the console changed between mono <-> color, then
3175 * the attributes in the screenbuf will be wrong. The
3176 * following resets all attributes to something sane.
3177 */
3178 if (old_was_color != vc->vc_can_do_color)
3179 clear_buffer_attributes(vc);
3180 }
3181
3182 pr_info("Console: switching ");
3183 if (!deflt)
3184 printk(KERN_CONT "consoles %d-%d ", first+1, last+1);
3185 if (j >= 0) {
3186 struct vc_data *vc = vc_cons[j].d;
3187
3188 printk(KERN_CONT "to %s %s %dx%d\n",
3189 vc->vc_can_do_color ? "colour" : "mono",
3190 desc, vc->vc_cols, vc->vc_rows);
3191
3192 if (k >= 0) {
3193 vc = vc_cons[k].d;
3194 update_screen(vc);
3195 }
3196 } else
3197 printk(KERN_CONT "to %s\n", desc);
3198
3199 retval = 0;
3200 err:
3201 module_put(owner);
3202 return retval;
3203 };
3204
3205
3206 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
3207 /* unlocked version of unbind_con_driver() */
3208 int do_unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
3209 {
3210 struct module *owner = csw->owner;
3211 const struct consw *defcsw = NULL;
3212 struct con_driver *con_driver = NULL, *con_back = NULL;
3213 int i, retval = -ENODEV;
3214
3215 if (!try_module_get(owner))
3216 return -ENODEV;
3217
3218 WARN_CONSOLE_UNLOCKED();
3219
3220 /* check if driver is registered and if it is unbindable */
3221 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3222 con_driver = &registered_con_driver[i];
3223
3224 if (con_driver->con == csw &&
3225 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3226 retval = 0;
3227 break;
3228 }
3229 }
3230
3231 if (retval)
3232 goto err;
3233
3234 retval = -ENODEV;
3235
3236 /* check if backup driver exists */
3237 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3238 con_back = &registered_con_driver[i];
3239
3240 if (con_back->con && con_back->con != csw) {
3241 defcsw = con_back->con;
3242 retval = 0;
3243 break;
3244 }
3245 }
3246
3247 if (retval)
3248 goto err;
3249
3250 if (!con_is_bound(csw))
3251 goto err;
3252
3253 first = max(first, con_driver->first);
3254 last = min(last, con_driver->last);
3255
3256 for (i = first; i <= last; i++) {
3257 if (con_driver_map[i] == csw) {
3258 module_put(csw->owner);
3259 con_driver_map[i] = NULL;
3260 }
3261 }
3262
3263 if (!con_is_bound(defcsw)) {
3264 const struct consw *defconsw = conswitchp;
3265
3266 defcsw->con_startup();
3267 con_back->flag |= CON_DRIVER_FLAG_INIT;
3268 /*
3269 * vgacon may change the default driver to point
3270 * to dummycon, we restore it here...
3271 */
3272 conswitchp = defconsw;
3273 }
3274
3275 if (!con_is_bound(csw))
3276 con_driver->flag &= ~CON_DRIVER_FLAG_INIT;
3277
3278 /* ignore return value, binding should not fail */
3279 do_bind_con_driver(defcsw, first, last, deflt);
3280 err:
3281 module_put(owner);
3282 return retval;
3283
3284 }
3285 EXPORT_SYMBOL_GPL(do_unbind_con_driver);
3286
3287 static int vt_bind(struct con_driver *con)
3288 {
3289 const struct consw *defcsw = NULL, *csw = NULL;
3290 int i, more = 1, first = -1, last = -1, deflt = 0;
3291
3292 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE))
3293 goto err;
3294
3295 csw = con->con;
3296
3297 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3298 struct con_driver *con = &registered_con_driver[i];
3299
3300 if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) {
3301 defcsw = con->con;
3302 break;
3303 }
3304 }
3305
3306 if (!defcsw)
3307 goto err;
3308
3309 while (more) {
3310 more = 0;
3311
3312 for (i = con->first; i <= con->last; i++) {
3313 if (con_driver_map[i] == defcsw) {
3314 if (first == -1)
3315 first = i;
3316 last = i;
3317 more = 1;
3318 } else if (first != -1)
3319 break;
3320 }
3321
3322 if (first == 0 && last == MAX_NR_CONSOLES -1)
3323 deflt = 1;
3324
3325 if (first != -1)
3326 do_bind_con_driver(csw, first, last, deflt);
3327
3328 first = -1;
3329 last = -1;
3330 deflt = 0;
3331 }
3332
3333 err:
3334 return 0;
3335 }
3336
3337 static int vt_unbind(struct con_driver *con)
3338 {
3339 const struct consw *csw = NULL;
3340 int i, more = 1, first = -1, last = -1, deflt = 0;
3341 int ret;
3342
3343 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE))
3344 goto err;
3345
3346 csw = con->con;
3347
3348 while (more) {
3349 more = 0;
3350
3351 for (i = con->first; i <= con->last; i++) {
3352 if (con_driver_map[i] == csw) {
3353 if (first == -1)
3354 first = i;
3355 last = i;
3356 more = 1;
3357 } else if (first != -1)
3358 break;
3359 }
3360
3361 if (first == 0 && last == MAX_NR_CONSOLES -1)
3362 deflt = 1;
3363
3364 if (first != -1) {
3365 ret = do_unbind_con_driver(csw, first, last, deflt);
3366 if (ret != 0)
3367 return ret;
3368 }
3369
3370 first = -1;
3371 last = -1;
3372 deflt = 0;
3373 }
3374
3375 err:
3376 return 0;
3377 }
3378 #else
3379 static inline int vt_bind(struct con_driver *con)
3380 {
3381 return 0;
3382 }
3383 static inline int vt_unbind(struct con_driver *con)
3384 {
3385 return 0;
3386 }
3387 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3388
3389 static ssize_t store_bind(struct device *dev, struct device_attribute *attr,
3390 const char *buf, size_t count)
3391 {
3392 struct con_driver *con = dev_get_drvdata(dev);
3393 int bind = simple_strtoul(buf, NULL, 0);
3394
3395 console_lock();
3396
3397 if (bind)
3398 vt_bind(con);
3399 else
3400 vt_unbind(con);
3401
3402 console_unlock();
3403
3404 return count;
3405 }
3406
3407 static ssize_t show_bind(struct device *dev, struct device_attribute *attr,
3408 char *buf)
3409 {
3410 struct con_driver *con = dev_get_drvdata(dev);
3411 int bind = con_is_bound(con->con);
3412
3413 return snprintf(buf, PAGE_SIZE, "%i\n", bind);
3414 }
3415
3416 static ssize_t show_name(struct device *dev, struct device_attribute *attr,
3417 char *buf)
3418 {
3419 struct con_driver *con = dev_get_drvdata(dev);
3420
3421 return snprintf(buf, PAGE_SIZE, "%s %s\n",
3422 (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)",
3423 con->desc);
3424
3425 }
3426
3427 static DEVICE_ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind);
3428 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
3429
3430 static struct attribute *con_dev_attrs[] = {
3431 &dev_attr_bind.attr,
3432 &dev_attr_name.attr,
3433 NULL
3434 };
3435
3436 ATTRIBUTE_GROUPS(con_dev);
3437
3438 static int vtconsole_init_device(struct con_driver *con)
3439 {
3440 con->flag |= CON_DRIVER_FLAG_ATTR;
3441 return 0;
3442 }
3443
3444 static void vtconsole_deinit_device(struct con_driver *con)
3445 {
3446 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3447 }
3448
3449 /**
3450 * con_is_bound - checks if driver is bound to the console
3451 * @csw: console driver
3452 *
3453 * RETURNS: zero if unbound, nonzero if bound
3454 *
3455 * Drivers can call this and if zero, they should release
3456 * all resources allocated on con_startup()
3457 */
3458 int con_is_bound(const struct consw *csw)
3459 {
3460 int i, bound = 0;
3461
3462 for (i = 0; i < MAX_NR_CONSOLES; i++) {
3463 if (con_driver_map[i] == csw) {
3464 bound = 1;
3465 break;
3466 }
3467 }
3468
3469 return bound;
3470 }
3471 EXPORT_SYMBOL(con_is_bound);
3472
3473 /**
3474 * con_debug_enter - prepare the console for the kernel debugger
3475 * @sw: console driver
3476 *
3477 * Called when the console is taken over by the kernel debugger, this
3478 * function needs to save the current console state, then put the console
3479 * into a state suitable for the kernel debugger.
3480 *
3481 * RETURNS:
3482 * Zero on success, nonzero if a failure occurred when trying to prepare
3483 * the console for the debugger.
3484 */
3485 int con_debug_enter(struct vc_data *vc)
3486 {
3487 int ret = 0;
3488
3489 saved_fg_console = fg_console;
3490 saved_last_console = last_console;
3491 saved_want_console = want_console;
3492 saved_vc_mode = vc->vc_mode;
3493 saved_console_blanked = console_blanked;
3494 vc->vc_mode = KD_TEXT;
3495 console_blanked = 0;
3496 if (vc->vc_sw->con_debug_enter)
3497 ret = vc->vc_sw->con_debug_enter(vc);
3498 #ifdef CONFIG_KGDB_KDB
3499 /* Set the initial LINES variable if it is not already set */
3500 if (vc->vc_rows < 999) {
3501 int linecount;
3502 char lns[4];
3503 const char *setargs[3] = {
3504 "set",
3505 "LINES",
3506 lns,
3507 };
3508 if (kdbgetintenv(setargs[0], &linecount)) {
3509 snprintf(lns, 4, "%i", vc->vc_rows);
3510 kdb_set(2, setargs);
3511 }
3512 }
3513 if (vc->vc_cols < 999) {
3514 int colcount;
3515 char cols[4];
3516 const char *setargs[3] = {
3517 "set",
3518 "COLUMNS",
3519 cols,
3520 };
3521 if (kdbgetintenv(setargs[0], &colcount)) {
3522 snprintf(cols, 4, "%i", vc->vc_cols);
3523 kdb_set(2, setargs);
3524 }
3525 }
3526 #endif /* CONFIG_KGDB_KDB */
3527 return ret;
3528 }
3529 EXPORT_SYMBOL_GPL(con_debug_enter);
3530
3531 /**
3532 * con_debug_leave - restore console state
3533 * @sw: console driver
3534 *
3535 * Restore the console state to what it was before the kernel debugger
3536 * was invoked.
3537 *
3538 * RETURNS:
3539 * Zero on success, nonzero if a failure occurred when trying to restore
3540 * the console.
3541 */
3542 int con_debug_leave(void)
3543 {
3544 struct vc_data *vc;
3545 int ret = 0;
3546
3547 fg_console = saved_fg_console;
3548 last_console = saved_last_console;
3549 want_console = saved_want_console;
3550 console_blanked = saved_console_blanked;
3551 vc_cons[fg_console].d->vc_mode = saved_vc_mode;
3552
3553 vc = vc_cons[fg_console].d;
3554 if (vc->vc_sw->con_debug_leave)
3555 ret = vc->vc_sw->con_debug_leave(vc);
3556 return ret;
3557 }
3558 EXPORT_SYMBOL_GPL(con_debug_leave);
3559
3560 static int do_register_con_driver(const struct consw *csw, int first, int last)
3561 {
3562 struct module *owner = csw->owner;
3563 struct con_driver *con_driver;
3564 const char *desc;
3565 int i, retval;
3566
3567 WARN_CONSOLE_UNLOCKED();
3568
3569 if (!try_module_get(owner))
3570 return -ENODEV;
3571
3572 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3573 con_driver = &registered_con_driver[i];
3574
3575 /* already registered */
3576 if (con_driver->con == csw) {
3577 retval = -EBUSY;
3578 goto err;
3579 }
3580 }
3581
3582 desc = csw->con_startup();
3583 if (!desc) {
3584 retval = -ENODEV;
3585 goto err;
3586 }
3587
3588 retval = -EINVAL;
3589
3590 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3591 con_driver = &registered_con_driver[i];
3592
3593 if (con_driver->con == NULL &&
3594 !(con_driver->flag & CON_DRIVER_FLAG_ZOMBIE)) {
3595 con_driver->con = csw;
3596 con_driver->desc = desc;
3597 con_driver->node = i;
3598 con_driver->flag = CON_DRIVER_FLAG_MODULE |
3599 CON_DRIVER_FLAG_INIT;
3600 con_driver->first = first;
3601 con_driver->last = last;
3602 retval = 0;
3603 break;
3604 }
3605 }
3606
3607 if (retval)
3608 goto err;
3609
3610 con_driver->dev =
3611 device_create_with_groups(vtconsole_class, NULL,
3612 MKDEV(0, con_driver->node),
3613 con_driver, con_dev_groups,
3614 "vtcon%i", con_driver->node);
3615 if (IS_ERR(con_driver->dev)) {
3616 printk(KERN_WARNING "Unable to create device for %s; "
3617 "errno = %ld\n", con_driver->desc,
3618 PTR_ERR(con_driver->dev));
3619 con_driver->dev = NULL;
3620 } else {
3621 vtconsole_init_device(con_driver);
3622 }
3623
3624 err:
3625 module_put(owner);
3626 return retval;
3627 }
3628
3629
3630 /**
3631 * do_unregister_con_driver - unregister console driver from console layer
3632 * @csw: console driver
3633 *
3634 * DESCRIPTION: All drivers that registers to the console layer must
3635 * call this function upon exit, or if the console driver is in a state
3636 * where it won't be able to handle console services, such as the
3637 * framebuffer console without loaded framebuffer drivers.
3638 *
3639 * The driver must unbind first prior to unregistration.
3640 */
3641 int do_unregister_con_driver(const struct consw *csw)
3642 {
3643 int i;
3644
3645 /* cannot unregister a bound driver */
3646 if (con_is_bound(csw))
3647 return -EBUSY;
3648
3649 if (csw == conswitchp)
3650 return -EINVAL;
3651
3652 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3653 struct con_driver *con_driver = &registered_con_driver[i];
3654
3655 if (con_driver->con == csw) {
3656 /*
3657 * Defer the removal of the sysfs entries since that
3658 * will acquire the kernfs s_active lock and we can't
3659 * acquire this lock while holding the console lock:
3660 * the unbind sysfs entry imposes already the opposite
3661 * order. Reset con already here to prevent any later
3662 * lookup to succeed and mark this slot as zombie, so
3663 * it won't get reused until we complete the removal
3664 * in the deferred work.
3665 */
3666 con_driver->con = NULL;
3667 con_driver->flag = CON_DRIVER_FLAG_ZOMBIE;
3668 schedule_work(&con_driver_unregister_work);
3669
3670 return 0;
3671 }
3672 }
3673
3674 return -ENODEV;
3675 }
3676 EXPORT_SYMBOL_GPL(do_unregister_con_driver);
3677
3678 static void con_driver_unregister_callback(struct work_struct *ignored)
3679 {
3680 int i;
3681
3682 console_lock();
3683
3684 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3685 struct con_driver *con_driver = &registered_con_driver[i];
3686
3687 if (!(con_driver->flag & CON_DRIVER_FLAG_ZOMBIE))
3688 continue;
3689
3690 console_unlock();
3691
3692 vtconsole_deinit_device(con_driver);
3693 device_destroy(vtconsole_class, MKDEV(0, con_driver->node));
3694
3695 console_lock();
3696
3697 if (WARN_ON_ONCE(con_driver->con))
3698 con_driver->con = NULL;
3699 con_driver->desc = NULL;
3700 con_driver->dev = NULL;
3701 con_driver->node = 0;
3702 WARN_ON_ONCE(con_driver->flag != CON_DRIVER_FLAG_ZOMBIE);
3703 con_driver->flag = 0;
3704 con_driver->first = 0;
3705 con_driver->last = 0;
3706 }
3707
3708 console_unlock();
3709 }
3710
3711 /*
3712 * If we support more console drivers, this function is used
3713 * when a driver wants to take over some existing consoles
3714 * and become default driver for newly opened ones.
3715 *
3716 * do_take_over_console is basically a register followed by unbind
3717 */
3718 int do_take_over_console(const struct consw *csw, int first, int last, int deflt)
3719 {
3720 int err;
3721
3722 err = do_register_con_driver(csw, first, last);
3723 /*
3724 * If we get an busy error we still want to bind the console driver
3725 * and return success, as we may have unbound the console driver
3726 * but not unregistered it.
3727 */
3728 if (err == -EBUSY)
3729 err = 0;
3730 if (!err)
3731 do_bind_con_driver(csw, first, last, deflt);
3732
3733 return err;
3734 }
3735 EXPORT_SYMBOL_GPL(do_take_over_console);
3736
3737
3738 /*
3739 * give_up_console is a wrapper to unregister_con_driver. It will only
3740 * work if driver is fully unbound.
3741 */
3742 void give_up_console(const struct consw *csw)
3743 {
3744 console_lock();
3745 do_unregister_con_driver(csw);
3746 console_unlock();
3747 }
3748
3749 static int __init vtconsole_class_init(void)
3750 {
3751 int i;
3752
3753 vtconsole_class = class_create(THIS_MODULE, "vtconsole");
3754 if (IS_ERR(vtconsole_class)) {
3755 printk(KERN_WARNING "Unable to create vt console class; "
3756 "errno = %ld\n", PTR_ERR(vtconsole_class));
3757 vtconsole_class = NULL;
3758 }
3759
3760 /* Add system drivers to sysfs */
3761 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3762 struct con_driver *con = &registered_con_driver[i];
3763
3764 if (con->con && !con->dev) {
3765 con->dev =
3766 device_create_with_groups(vtconsole_class, NULL,
3767 MKDEV(0, con->node),
3768 con, con_dev_groups,
3769 "vtcon%i", con->node);
3770
3771 if (IS_ERR(con->dev)) {
3772 printk(KERN_WARNING "Unable to create "
3773 "device for %s; errno = %ld\n",
3774 con->desc, PTR_ERR(con->dev));
3775 con->dev = NULL;
3776 } else {
3777 vtconsole_init_device(con);
3778 }
3779 }
3780 }
3781
3782 return 0;
3783 }
3784 postcore_initcall(vtconsole_class_init);
3785
3786 #endif
3787
3788 /*
3789 * Screen blanking
3790 */
3791
3792 static int set_vesa_blanking(char __user *p)
3793 {
3794 unsigned int mode;
3795
3796 if (get_user(mode, p + 1))
3797 return -EFAULT;
3798
3799 vesa_blank_mode = (mode < 4) ? mode : 0;
3800 return 0;
3801 }
3802
3803 void do_blank_screen(int entering_gfx)
3804 {
3805 struct vc_data *vc = vc_cons[fg_console].d;
3806 int i;
3807
3808 WARN_CONSOLE_UNLOCKED();
3809
3810 if (console_blanked) {
3811 if (blank_state == blank_vesa_wait) {
3812 blank_state = blank_off;
3813 vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0);
3814 }
3815 return;
3816 }
3817
3818 /* entering graphics mode? */
3819 if (entering_gfx) {
3820 hide_cursor(vc);
3821 save_screen(vc);
3822 vc->vc_sw->con_blank(vc, -1, 1);
3823 console_blanked = fg_console + 1;
3824 blank_state = blank_off;
3825 set_origin(vc);
3826 return;
3827 }
3828
3829 if (blank_state != blank_normal_wait)
3830 return;
3831 blank_state = blank_off;
3832
3833 /* don't blank graphics */
3834 if (vc->vc_mode != KD_TEXT) {
3835 console_blanked = fg_console + 1;
3836 return;
3837 }
3838
3839 hide_cursor(vc);
3840 del_timer_sync(&console_timer);
3841 blank_timer_expired = 0;
3842
3843 save_screen(vc);
3844 /* In case we need to reset origin, blanking hook returns 1 */
3845 i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0);
3846 console_blanked = fg_console + 1;
3847 if (i)
3848 set_origin(vc);
3849
3850 if (console_blank_hook && console_blank_hook(1))
3851 return;
3852
3853 if (vesa_off_interval && vesa_blank_mode) {
3854 blank_state = blank_vesa_wait;
3855 mod_timer(&console_timer, jiffies + vesa_off_interval);
3856 }
3857 vt_event_post(VT_EVENT_BLANK, vc->vc_num, vc->vc_num);
3858 }
3859 EXPORT_SYMBOL(do_blank_screen);
3860
3861 /*
3862 * Called by timer as well as from vt_console_driver
3863 */
3864 void do_unblank_screen(int leaving_gfx)
3865 {
3866 struct vc_data *vc;
3867
3868 /* This should now always be called from a "sane" (read: can schedule)
3869 * context for the sake of the low level drivers, except in the special
3870 * case of oops_in_progress
3871 */
3872 if (!oops_in_progress)
3873 might_sleep();
3874
3875 WARN_CONSOLE_UNLOCKED();
3876
3877 ignore_poke = 0;
3878 if (!console_blanked)
3879 return;
3880 if (!vc_cons_allocated(fg_console)) {
3881 /* impossible */
3882 pr_warn("unblank_screen: tty %d not allocated ??\n",
3883 fg_console + 1);
3884 return;
3885 }
3886 vc = vc_cons[fg_console].d;
3887 /* Try to unblank in oops case too */
3888 if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc))
3889 return; /* but leave console_blanked != 0 */
3890
3891 if (blankinterval) {
3892 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
3893 blank_state = blank_normal_wait;
3894 }
3895
3896 console_blanked = 0;
3897 if (vc->vc_sw->con_blank(vc, 0, leaving_gfx) || vt_force_oops_output(vc))
3898 /* Low-level driver cannot restore -> do it ourselves */
3899 update_screen(vc);
3900 if (console_blank_hook)
3901 console_blank_hook(0);
3902 set_palette(vc);
3903 set_cursor(vc);
3904 vt_event_post(VT_EVENT_UNBLANK, vc->vc_num, vc->vc_num);
3905 }
3906 EXPORT_SYMBOL(do_unblank_screen);
3907
3908 /*
3909 * This is called by the outside world to cause a forced unblank, mostly for
3910 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
3911 * call it with 1 as an argument and so force a mode restore... that may kill
3912 * X or at least garbage the screen but would also make the Oops visible...
3913 */
3914 void unblank_screen(void)
3915 {
3916 do_unblank_screen(0);
3917 }
3918
3919 /*
3920 * We defer the timer blanking to work queue so it can take the console mutex
3921 * (console operations can still happen at irq time, but only from printk which
3922 * has the console mutex. Not perfect yet, but better than no locking
3923 */
3924 static void blank_screen_t(unsigned long dummy)
3925 {
3926 blank_timer_expired = 1;
3927 schedule_work(&console_work);
3928 }
3929
3930 void poke_blanked_console(void)
3931 {
3932 WARN_CONSOLE_UNLOCKED();
3933
3934 /* Add this so we quickly catch whoever might call us in a non
3935 * safe context. Nowadays, unblank_screen() isn't to be called in
3936 * atomic contexts and is allowed to schedule (with the special case
3937 * of oops_in_progress, but that isn't of any concern for this
3938 * function. --BenH.
3939 */
3940 might_sleep();
3941
3942 /* This isn't perfectly race free, but a race here would be mostly harmless,
3943 * at worse, we'll do a spurrious blank and it's unlikely
3944 */
3945 del_timer(&console_timer);
3946 blank_timer_expired = 0;
3947
3948 if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS)
3949 return;
3950 if (console_blanked)
3951 unblank_screen();
3952 else if (blankinterval) {
3953 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
3954 blank_state = blank_normal_wait;
3955 }
3956 }
3957
3958 /*
3959 * Palettes
3960 */
3961
3962 static void set_palette(struct vc_data *vc)
3963 {
3964 WARN_CONSOLE_UNLOCKED();
3965
3966 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_set_palette)
3967 vc->vc_sw->con_set_palette(vc, color_table);
3968 }
3969
3970 /*
3971 * Load palette into the DAC registers. arg points to a colour
3972 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
3973 */
3974
3975 int con_set_cmap(unsigned char __user *arg)
3976 {
3977 int i, j, k;
3978 unsigned char colormap[3*16];
3979
3980 if (copy_from_user(colormap, arg, sizeof(colormap)))
3981 return -EFAULT;
3982
3983 console_lock();
3984 for (i = k = 0; i < 16; i++) {
3985 default_red[i] = colormap[k++];
3986 default_grn[i] = colormap[k++];
3987 default_blu[i] = colormap[k++];
3988 }
3989 for (i = 0; i < MAX_NR_CONSOLES; i++) {
3990 if (!vc_cons_allocated(i))
3991 continue;
3992 for (j = k = 0; j < 16; j++) {
3993 vc_cons[i].d->vc_palette[k++] = default_red[j];
3994 vc_cons[i].d->vc_palette[k++] = default_grn[j];
3995 vc_cons[i].d->vc_palette[k++] = default_blu[j];
3996 }
3997 set_palette(vc_cons[i].d);
3998 }
3999 console_unlock();
4000
4001 return 0;
4002 }
4003
4004 int con_get_cmap(unsigned char __user *arg)
4005 {
4006 int i, k;
4007 unsigned char colormap[3*16];
4008
4009 console_lock();
4010 for (i = k = 0; i < 16; i++) {
4011 colormap[k++] = default_red[i];
4012 colormap[k++] = default_grn[i];
4013 colormap[k++] = default_blu[i];
4014 }
4015 console_unlock();
4016
4017 if (copy_to_user(arg, colormap, sizeof(colormap)))
4018 return -EFAULT;
4019
4020 return 0;
4021 }
4022
4023 void reset_palette(struct vc_data *vc)
4024 {
4025 int j, k;
4026 for (j=k=0; j<16; j++) {
4027 vc->vc_palette[k++] = default_red[j];
4028 vc->vc_palette[k++] = default_grn[j];
4029 vc->vc_palette[k++] = default_blu[j];
4030 }
4031 set_palette(vc);
4032 }
4033
4034 /*
4035 * Font switching
4036 *
4037 * Currently we only support fonts up to 32 pixels wide, at a maximum height
4038 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
4039 * depending on width) reserved for each character which is kinda wasty, but
4040 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
4041 * is up to the actual low-level console-driver convert data into its favorite
4042 * format (maybe we should add a `fontoffset' field to the `display'
4043 * structure so we won't have to convert the fontdata all the time.
4044 * /Jes
4045 */
4046
4047 #define max_font_size 65536
4048
4049 static int con_font_get(struct vc_data *vc, struct console_font_op *op)
4050 {
4051 struct console_font font;
4052 int rc = -EINVAL;
4053 int c;
4054
4055 if (op->data) {
4056 font.data = kmalloc(max_font_size, GFP_KERNEL);
4057 if (!font.data)
4058 return -ENOMEM;
4059 } else
4060 font.data = NULL;
4061
4062 console_lock();
4063 if (vc->vc_mode != KD_TEXT)
4064 rc = -EINVAL;
4065 else if (vc->vc_sw->con_font_get)
4066 rc = vc->vc_sw->con_font_get(vc, &font);
4067 else
4068 rc = -ENOSYS;
4069 console_unlock();
4070
4071 if (rc)
4072 goto out;
4073
4074 c = (font.width+7)/8 * 32 * font.charcount;
4075
4076 if (op->data && font.charcount > op->charcount)
4077 rc = -ENOSPC;
4078 if (!(op->flags & KD_FONT_FLAG_OLD)) {
4079 if (font.width > op->width || font.height > op->height)
4080 rc = -ENOSPC;
4081 } else {
4082 if (font.width != 8)
4083 rc = -EIO;
4084 else if ((op->height && font.height > op->height) ||
4085 font.height > 32)
4086 rc = -ENOSPC;
4087 }
4088 if (rc)
4089 goto out;
4090
4091 op->height = font.height;
4092 op->width = font.width;
4093 op->charcount = font.charcount;
4094
4095 if (op->data && copy_to_user(op->data, font.data, c))
4096 rc = -EFAULT;
4097
4098 out:
4099 kfree(font.data);
4100 return rc;
4101 }
4102
4103 static int con_font_set(struct vc_data *vc, struct console_font_op *op)
4104 {
4105 struct console_font font;
4106 int rc = -EINVAL;
4107 int size;
4108
4109 if (vc->vc_mode != KD_TEXT)
4110 return -EINVAL;
4111 if (!op->data)
4112 return -EINVAL;
4113 if (op->charcount > 512)
4114 return -EINVAL;
4115 if (!op->height) { /* Need to guess font height [compat] */
4116 int h, i;
4117 u8 __user *charmap = op->data;
4118 u8 tmp;
4119
4120 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
4121 so that we can get rid of this soon */
4122 if (!(op->flags & KD_FONT_FLAG_OLD))
4123 return -EINVAL;
4124 for (h = 32; h > 0; h--)
4125 for (i = 0; i < op->charcount; i++) {
4126 if (get_user(tmp, &charmap[32*i+h-1]))
4127 return -EFAULT;
4128 if (tmp)
4129 goto nonzero;
4130 }
4131 return -EINVAL;
4132 nonzero:
4133 op->height = h;
4134 }
4135 if (op->width <= 0 || op->width > 32 || op->height > 32)
4136 return -EINVAL;
4137 size = (op->width+7)/8 * 32 * op->charcount;
4138 if (size > max_font_size)
4139 return -ENOSPC;
4140 font.charcount = op->charcount;
4141 font.height = op->height;
4142 font.width = op->width;
4143 font.data = memdup_user(op->data, size);
4144 if (IS_ERR(font.data))
4145 return PTR_ERR(font.data);
4146 console_lock();
4147 if (vc->vc_mode != KD_TEXT)
4148 rc = -EINVAL;
4149 else if (vc->vc_sw->con_font_set)
4150 rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
4151 else
4152 rc = -ENOSYS;
4153 console_unlock();
4154 kfree(font.data);
4155 return rc;
4156 }
4157
4158 static int con_font_default(struct vc_data *vc, struct console_font_op *op)
4159 {
4160 struct console_font font = {.width = op->width, .height = op->height};
4161 char name[MAX_FONT_NAME];
4162 char *s = name;
4163 int rc;
4164
4165
4166 if (!op->data)
4167 s = NULL;
4168 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0)
4169 return -EFAULT;
4170 else
4171 name[MAX_FONT_NAME - 1] = 0;
4172
4173 console_lock();
4174 if (vc->vc_mode != KD_TEXT) {
4175 console_unlock();
4176 return -EINVAL;
4177 }
4178 if (vc->vc_sw->con_font_default)
4179 rc = vc->vc_sw->con_font_default(vc, &font, s);
4180 else
4181 rc = -ENOSYS;
4182 console_unlock();
4183 if (!rc) {
4184 op->width = font.width;
4185 op->height = font.height;
4186 }
4187 return rc;
4188 }
4189
4190 static int con_font_copy(struct vc_data *vc, struct console_font_op *op)
4191 {
4192 int con = op->height;
4193 int rc;
4194
4195
4196 console_lock();
4197 if (vc->vc_mode != KD_TEXT)
4198 rc = -EINVAL;
4199 else if (!vc->vc_sw->con_font_copy)
4200 rc = -ENOSYS;
4201 else if (con < 0 || !vc_cons_allocated(con))
4202 rc = -ENOTTY;
4203 else if (con == vc->vc_num) /* nothing to do */
4204 rc = 0;
4205 else
4206 rc = vc->vc_sw->con_font_copy(vc, con);
4207 console_unlock();
4208 return rc;
4209 }
4210
4211 int con_font_op(struct vc_data *vc, struct console_font_op *op)
4212 {
4213 switch (op->op) {
4214 case KD_FONT_OP_SET:
4215 return con_font_set(vc, op);
4216 case KD_FONT_OP_GET:
4217 return con_font_get(vc, op);
4218 case KD_FONT_OP_SET_DEFAULT:
4219 return con_font_default(vc, op);
4220 case KD_FONT_OP_COPY:
4221 return con_font_copy(vc, op);
4222 }
4223 return -ENOSYS;
4224 }
4225
4226 /*
4227 * Interface exported to selection and vcs.
4228 */
4229
4230 /* used by selection */
4231 u16 screen_glyph(struct vc_data *vc, int offset)
4232 {
4233 u16 w = scr_readw(screenpos(vc, offset, 1));
4234 u16 c = w & 0xff;
4235
4236 if (w & vc->vc_hi_font_mask)
4237 c |= 0x100;
4238 return c;
4239 }
4240 EXPORT_SYMBOL_GPL(screen_glyph);
4241
4242 /* used by vcs - note the word offset */
4243 unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed)
4244 {
4245 return screenpos(vc, 2 * w_offset, viewed);
4246 }
4247 EXPORT_SYMBOL_GPL(screen_pos);
4248
4249 void getconsxy(struct vc_data *vc, unsigned char *p)
4250 {
4251 p[0] = vc->vc_x;
4252 p[1] = vc->vc_y;
4253 }
4254
4255 void putconsxy(struct vc_data *vc, unsigned char *p)
4256 {
4257 hide_cursor(vc);
4258 gotoxy(vc, p[0], p[1]);
4259 set_cursor(vc);
4260 }
4261
4262 u16 vcs_scr_readw(struct vc_data *vc, const u16 *org)
4263 {
4264 if ((unsigned long)org == vc->vc_pos && softcursor_original != -1)
4265 return softcursor_original;
4266 return scr_readw(org);
4267 }
4268
4269 void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org)
4270 {
4271 scr_writew(val, org);
4272 if ((unsigned long)org == vc->vc_pos) {
4273 softcursor_original = -1;
4274 add_softcursor(vc);
4275 }
4276 }
4277
4278 void vcs_scr_updated(struct vc_data *vc)
4279 {
4280 notify_update(vc);
4281 }
4282
4283 void vc_scrolldelta_helper(struct vc_data *c, int lines,
4284 unsigned int rolled_over, void *base, unsigned int size)
4285 {
4286 unsigned long ubase = (unsigned long)base;
4287 ptrdiff_t scr_end = (void *)c->vc_scr_end - base;
4288 ptrdiff_t vorigin = (void *)c->vc_visible_origin - base;
4289 ptrdiff_t origin = (void *)c->vc_origin - base;
4290 int margin = c->vc_size_row * 4;
4291 int from, wrap, from_off, avail;
4292
4293 /* Turn scrollback off */
4294 if (!lines) {
4295 c->vc_visible_origin = c->vc_origin;
4296 return;
4297 }
4298
4299 /* Do we have already enough to allow jumping from 0 to the end? */
4300 if (rolled_over > scr_end + margin) {
4301 from = scr_end;
4302 wrap = rolled_over + c->vc_size_row;
4303 } else {
4304 from = 0;
4305 wrap = size;
4306 }
4307
4308 from_off = (vorigin - from + wrap) % wrap + lines * c->vc_size_row;
4309 avail = (origin - from + wrap) % wrap;
4310
4311 /* Only a little piece would be left? Show all incl. the piece! */
4312 if (avail < 2 * margin)
4313 margin = 0;
4314 if (from_off < margin)
4315 from_off = 0;
4316 if (from_off > avail - margin)
4317 from_off = avail;
4318
4319 c->vc_visible_origin = ubase + (from + from_off) % wrap;
4320 }
4321 EXPORT_SYMBOL_GPL(vc_scrolldelta_helper);
4322
4323 /*
4324 * Visible symbols for modules
4325 */
4326
4327 EXPORT_SYMBOL(color_table);
4328 EXPORT_SYMBOL(default_red);
4329 EXPORT_SYMBOL(default_grn);
4330 EXPORT_SYMBOL(default_blu);
4331 EXPORT_SYMBOL(update_region);
4332 EXPORT_SYMBOL(redraw_screen);
4333 EXPORT_SYMBOL(vc_resize);
4334 EXPORT_SYMBOL(fg_console);
4335 EXPORT_SYMBOL(console_blank_hook);
4336 EXPORT_SYMBOL(console_blanked);
4337 EXPORT_SYMBOL(vc_cons);
4338 EXPORT_SYMBOL(global_cursor_default);
4339 #ifndef VT_SINGLE_DRIVER
4340 EXPORT_SYMBOL(give_up_console);
4341 #endif
Linux with added FPC-III support