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[ARM] pxa: Gumstix Verdex PCMCIA support
[linux-2.6/verdex.git] / drivers / char / vt.c
blob0c80c68cd047400fc4f59a19cb1c0e47826be57c
1 /*
2 * linux/drivers/char/vt.c
3 *
4 * Copyright (C) 1991, 1992 Linus Torvalds
5 */
6
7 /*
8 * Hopefully this will be a rather complete VT102 implementation.
9 *
10 * Beeping thanks to John T Kohl.
11 *
12 * Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics
13 * Chars, and VT100 enhancements by Peter MacDonald.
14 *
15 * Copy and paste function by Andrew Haylett,
16 * some enhancements by Alessandro Rubini.
17 *
18 * Code to check for different video-cards mostly by Galen Hunt,
19 * <g-hunt@ee.utah.edu>
20 *
21 * Rudimentary ISO 10646/Unicode/UTF-8 character set support by
22 * Markus Kuhn, <mskuhn@immd4.informatik.uni-erlangen.de>.
23 *
24 * Dynamic allocation of consoles, aeb@cwi.nl, May 1994
25 * Resizing of consoles, aeb, 940926
26 *
27 * Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94
28 * <poe@daimi.aau.dk>
29 *
30 * User-defined bell sound, new setterm control sequences and printk
31 * redirection by Martin Mares <mj@k332.feld.cvut.cz> 19-Nov-95
32 *
33 * APM screenblank bug fixed Takashi Manabe <manabe@roy.dsl.tutics.tut.jp>
34 *
35 * Merge with the abstract console driver by Geert Uytterhoeven
36 * <geert@linux-m68k.org>, Jan 1997.
37 *
38 * Original m68k console driver modifications by
39 *
40 * - Arno Griffioen <arno@usn.nl>
41 * - David Carter <carter@cs.bris.ac.uk>
42 *
43 * The abstract console driver provides a generic interface for a text
44 * console. It supports VGA text mode, frame buffer based graphical consoles
45 * and special graphics processors that are only accessible through some
46 * registers (e.g. a TMS340x0 GSP).
47 *
48 * The interface to the hardware is specified using a special structure
49 * (struct consw) which contains function pointers to console operations
50 * (see <linux/console.h> for more information).
51 *
52 * Support for changeable cursor shape
53 * by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997
54 *
55 * Ported to i386 and con_scrolldelta fixed
56 * by Emmanuel Marty <core@ggi-project.org>, April 1998
57 *
58 * Resurrected character buffers in videoram plus lots of other trickery
59 * by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998
60 *
61 * Removed old-style timers, introduced console_timer, made timer
62 * deletion SMP-safe. 17Jun00, Andrew Morton
63 *
64 * Removed console_lock, enabled interrupts across all console operations
65 * 13 March 2001, Andrew Morton
66 *
67 * Fixed UTF-8 mode so alternate charset modes always work according
68 * to control sequences interpreted in do_con_trol function
69 * preserving backward VT100 semigraphics compatibility,
70 * malformed UTF sequences represented as sequences of replacement glyphs,
71 * original codes or '?' as a last resort if replacement glyph is undefined
72 * by Adam Tla/lka <atlka@pg.gda.pl>, Aug 2006
73 */
74
75 #include <linux/module.h>
76 #include <linux/types.h>
77 #include <linux/sched.h>
78 #include <linux/tty.h>
79 #include <linux/tty_flip.h>
80 #include <linux/kernel.h>
81 #include <linux/string.h>
82 #include <linux/errno.h>
83 #include <linux/kd.h>
84 #include <linux/slab.h>
85 #include <linux/major.h>
86 #include <linux/mm.h>
87 #include <linux/console.h>
88 #include <linux/init.h>
89 #include <linux/mutex.h>
90 #include <linux/vt_kern.h>
91 #include <linux/selection.h>
92 #include <linux/smp_lock.h>
93 #include <linux/tiocl.h>
94 #include <linux/kbd_kern.h>
95 #include <linux/consolemap.h>
96 #include <linux/timer.h>
97 #include <linux/interrupt.h>
98 #include <linux/workqueue.h>
99 #include <linux/pm.h>
100 #include <linux/font.h>
101 #include <linux/bitops.h>
102 #include <linux/notifier.h>
103 #include <linux/device.h>
104 #include <linux/io.h>
105 #include <asm/system.h>
106 #include <linux/uaccess.h>
107
108 #define MAX_NR_CON_DRIVER 16
109
110 #define CON_DRIVER_FLAG_MODULE 1
111 #define CON_DRIVER_FLAG_INIT 2
112 #define CON_DRIVER_FLAG_ATTR 4
113
114 struct con_driver {
115 const struct consw *con;
116 const char *desc;
117 struct device *dev;
118 int node;
119 int first;
120 int last;
121 int flag;
122 };
123
124 static struct con_driver registered_con_driver[MAX_NR_CON_DRIVER];
125 const struct consw *conswitchp;
126
127 /* A bitmap for codes <32. A bit of 1 indicates that the code
128 * corresponding to that bit number invokes some special action
129 * (such as cursor movement) and should not be displayed as a
130 * glyph unless the disp_ctrl mode is explicitly enabled.
131 */
132 #define CTRL_ACTION 0x0d00ff81
133 #define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */
134
135 /*
136 * Here is the default bell parameters: 750HZ, 1/8th of a second
137 */
138 #define DEFAULT_BELL_PITCH 750
139 #define DEFAULT_BELL_DURATION (HZ/8)
140
141 struct vc vc_cons [MAX_NR_CONSOLES];
142
143 #ifndef VT_SINGLE_DRIVER
144 static const struct consw *con_driver_map[MAX_NR_CONSOLES];
145 #endif
146
147 static int con_open(struct tty_struct *, struct file *);
148 static void vc_init(struct vc_data *vc, unsigned int rows,
149 unsigned int cols, int do_clear);
150 static void gotoxy(struct vc_data *vc, int new_x, int new_y);
151 static void save_cur(struct vc_data *vc);
152 static void reset_terminal(struct vc_data *vc, int do_clear);
153 static void con_flush_chars(struct tty_struct *tty);
154 static int set_vesa_blanking(char __user *p);
155 static void set_cursor(struct vc_data *vc);
156 static void hide_cursor(struct vc_data *vc);
157 static void console_callback(struct work_struct *ignored);
158 static void blank_screen_t(unsigned long dummy);
159 static void set_palette(struct vc_data *vc);
160
161 static int printable; /* Is console ready for printing? */
162 int default_utf8 = true;
163 module_param(default_utf8, int, S_IRUGO | S_IWUSR);
164
165 /*
166 * ignore_poke: don't unblank the screen when things are typed. This is
167 * mainly for the privacy of braille terminal users.
168 */
169 static int ignore_poke;
170
171 int do_poke_blanked_console;
172 int console_blanked;
173
174 static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
175 static int vesa_off_interval;
176 static int blankinterval = 10*60;
177 core_param(consoleblank, blankinterval, int, 0444);
178
179 static DECLARE_WORK(console_work, console_callback);
180
181 /*
182 * fg_console is the current virtual console,
183 * last_console is the last used one,
184 * want_console is the console we want to switch to,
185 * kmsg_redirect is the console for kernel messages,
186 */
187 int fg_console;
188 int last_console;
189 int want_console = -1;
190 int kmsg_redirect;
191
192 /*
193 * For each existing display, we have a pointer to console currently visible
194 * on that display, allowing consoles other than fg_console to be refreshed
195 * appropriately. Unless the low-level driver supplies its own display_fg
196 * variable, we use this one for the "master display".
197 */
198 static struct vc_data *master_display_fg;
199
200 /*
201 * Unfortunately, we need to delay tty echo when we're currently writing to the
202 * console since the code is (and always was) not re-entrant, so we schedule
203 * all flip requests to process context with schedule-task() and run it from
204 * console_callback().
205 */
206
207 /*
208 * For the same reason, we defer scrollback to the console callback.
209 */
210 static int scrollback_delta;
211
212 /*
213 * Hook so that the power management routines can (un)blank
214 * the console on our behalf.
215 */
216 int (*console_blank_hook)(int);
217
218 static DEFINE_TIMER(console_timer, blank_screen_t, 0, 0);
219 static int blank_state;
220 static int blank_timer_expired;
221 enum {
222 blank_off = 0,
223 blank_normal_wait,
224 blank_vesa_wait,
225 };
226
227 /*
228 * Notifier list for console events.
229 */
230 static ATOMIC_NOTIFIER_HEAD(vt_notifier_list);
231
232 int register_vt_notifier(struct notifier_block *nb)
233 {
234 return atomic_notifier_chain_register(&vt_notifier_list, nb);
235 }
236 EXPORT_SYMBOL_GPL(register_vt_notifier);
237
238 int unregister_vt_notifier(struct notifier_block *nb)
239 {
240 return atomic_notifier_chain_unregister(&vt_notifier_list, nb);
241 }
242 EXPORT_SYMBOL_GPL(unregister_vt_notifier);
243
244 static void notify_write(struct vc_data *vc, unsigned int unicode)
245 {
246 struct vt_notifier_param param = { .vc = vc, unicode = unicode };
247 atomic_notifier_call_chain(&vt_notifier_list, VT_WRITE, &param);
248 }
249
250 static void notify_update(struct vc_data *vc)
251 {
252 struct vt_notifier_param param = { .vc = vc };
253 atomic_notifier_call_chain(&vt_notifier_list, VT_UPDATE, &param);
254 }
255 /*
256 * Low-Level Functions
257 */
258
259 #define IS_FG(vc) ((vc)->vc_num == fg_console)
260
261 #ifdef VT_BUF_VRAM_ONLY
262 #define DO_UPDATE(vc) 0
263 #else
264 #define DO_UPDATE(vc) (CON_IS_VISIBLE(vc) && !console_blanked)
265 #endif
266
267 static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed)
268 {
269 unsigned short *p;
270
271 if (!viewed)
272 p = (unsigned short *)(vc->vc_origin + offset);
273 else if (!vc->vc_sw->con_screen_pos)
274 p = (unsigned short *)(vc->vc_visible_origin + offset);
275 else
276 p = vc->vc_sw->con_screen_pos(vc, offset);
277 return p;
278 }
279
280 static inline void scrolldelta(int lines)
281 {
282 scrollback_delta += lines;
283 schedule_console_callback();
284 }
285
286 void schedule_console_callback(void)
287 {
288 schedule_work(&console_work);
289 }
290
291 static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
292 {
293 unsigned short *d, *s;
294
295 if (t+nr >= b)
296 nr = b - t - 1;
297 if (b > vc->vc_rows || t >= b || nr < 1)
298 return;
299 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr))
300 return;
301 d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
302 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr));
303 scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row);
304 scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_video_erase_char,
305 vc->vc_size_row * nr);
306 }
307
308 static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
309 {
310 unsigned short *s;
311 unsigned int step;
312
313 if (t+nr >= b)
314 nr = b - t - 1;
315 if (b > vc->vc_rows || t >= b || nr < 1)
316 return;
317 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr))
318 return;
319 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
320 step = vc->vc_cols * nr;
321 scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row);
322 scr_memsetw(s, vc->vc_video_erase_char, 2 * step);
323 }
324
325 static void do_update_region(struct vc_data *vc, unsigned long start, int count)
326 {
327 #ifndef VT_BUF_VRAM_ONLY
328 unsigned int xx, yy, offset;
329 u16 *p;
330
331 p = (u16 *) start;
332 if (!vc->vc_sw->con_getxy) {
333 offset = (start - vc->vc_origin) / 2;
334 xx = offset % vc->vc_cols;
335 yy = offset / vc->vc_cols;
336 } else {
337 int nxx, nyy;
338 start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy);
339 xx = nxx; yy = nyy;
340 }
341 for(;;) {
342 u16 attrib = scr_readw(p) & 0xff00;
343 int startx = xx;
344 u16 *q = p;
345 while (xx < vc->vc_cols && count) {
346 if (attrib != (scr_readw(p) & 0xff00)) {
347 if (p > q)
348 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
349 startx = xx;
350 q = p;
351 attrib = scr_readw(p) & 0xff00;
352 }
353 p++;
354 xx++;
355 count--;
356 }
357 if (p > q)
358 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
359 if (!count)
360 break;
361 xx = 0;
362 yy++;
363 if (vc->vc_sw->con_getxy) {
364 p = (u16 *)start;
365 start = vc->vc_sw->con_getxy(vc, start, NULL, NULL);
366 }
367 }
368 #endif
369 }
370
371 void update_region(struct vc_data *vc, unsigned long start, int count)
372 {
373 WARN_CONSOLE_UNLOCKED();
374
375 if (DO_UPDATE(vc)) {
376 hide_cursor(vc);
377 do_update_region(vc, start, count);
378 set_cursor(vc);
379 }
380 }
381
382 /* Structure of attributes is hardware-dependent */
383
384 static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink,
385 u8 _underline, u8 _reverse, u8 _italic)
386 {
387 if (vc->vc_sw->con_build_attr)
388 return vc->vc_sw->con_build_attr(vc, _color, _intensity,
389 _blink, _underline, _reverse, _italic);
390
391 #ifndef VT_BUF_VRAM_ONLY
392 /*
393 * ++roman: I completely changed the attribute format for monochrome
394 * mode (!can_do_color). The formerly used MDA (monochrome display
395 * adapter) format didn't allow the combination of certain effects.
396 * Now the attribute is just a bit vector:
397 * Bit 0..1: intensity (0..2)
398 * Bit 2 : underline
399 * Bit 3 : reverse
400 * Bit 7 : blink
401 */
402 {
403 u8 a = _color;
404 if (!vc->vc_can_do_color)
405 return _intensity |
406 (_italic ? 2 : 0) |
407 (_underline ? 4 : 0) |
408 (_reverse ? 8 : 0) |
409 (_blink ? 0x80 : 0);
410 if (_italic)
411 a = (a & 0xF0) | vc->vc_itcolor;
412 else if (_underline)
413 a = (a & 0xf0) | vc->vc_ulcolor;
414 else if (_intensity == 0)
415 a = (a & 0xf0) | vc->vc_ulcolor;
416 if (_reverse)
417 a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77);
418 if (_blink)
419 a ^= 0x80;
420 if (_intensity == 2)
421 a ^= 0x08;
422 if (vc->vc_hi_font_mask == 0x100)
423 a <<= 1;
424 return a;
425 }
426 #else
427 return 0;
428 #endif
429 }
430
431 static void update_attr(struct vc_data *vc)
432 {
433 vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity,
434 vc->vc_blink, vc->vc_underline,
435 vc->vc_reverse ^ vc->vc_decscnm, vc->vc_italic);
436 vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm, 0) << 8) | ' ';
437 }
438
439 /* Note: inverting the screen twice should revert to the original state */
440 void invert_screen(struct vc_data *vc, int offset, int count, int viewed)
441 {
442 unsigned short *p;
443
444 WARN_CONSOLE_UNLOCKED();
445
446 count /= 2;
447 p = screenpos(vc, offset, viewed);
448 if (vc->vc_sw->con_invert_region)
449 vc->vc_sw->con_invert_region(vc, p, count);
450 #ifndef VT_BUF_VRAM_ONLY
451 else {
452 u16 *q = p;
453 int cnt = count;
454 u16 a;
455
456 if (!vc->vc_can_do_color) {
457 while (cnt--) {
458 a = scr_readw(q);
459 a ^= 0x0800;
460 scr_writew(a, q);
461 q++;
462 }
463 } else if (vc->vc_hi_font_mask == 0x100) {
464 while (cnt--) {
465 a = scr_readw(q);
466 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4);
467 scr_writew(a, q);
468 q++;
469 }
470 } else {
471 while (cnt--) {
472 a = scr_readw(q);
473 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4);
474 scr_writew(a, q);
475 q++;
476 }
477 }
478 }
479 #endif
480 if (DO_UPDATE(vc))
481 do_update_region(vc, (unsigned long) p, count);
482 }
483
484 /* used by selection: complement pointer position */
485 void complement_pos(struct vc_data *vc, int offset)
486 {
487 static int old_offset = -1;
488 static unsigned short old;
489 static unsigned short oldx, oldy;
490
491 WARN_CONSOLE_UNLOCKED();
492
493 if (old_offset != -1 && old_offset >= 0 &&
494 old_offset < vc->vc_screenbuf_size) {
495 scr_writew(old, screenpos(vc, old_offset, 1));
496 if (DO_UPDATE(vc))
497 vc->vc_sw->con_putc(vc, old, oldy, oldx);
498 }
499
500 old_offset = offset;
501
502 if (offset != -1 && offset >= 0 &&
503 offset < vc->vc_screenbuf_size) {
504 unsigned short new;
505 unsigned short *p;
506 p = screenpos(vc, offset, 1);
507 old = scr_readw(p);
508 new = old ^ vc->vc_complement_mask;
509 scr_writew(new, p);
510 if (DO_UPDATE(vc)) {
511 oldx = (offset >> 1) % vc->vc_cols;
512 oldy = (offset >> 1) / vc->vc_cols;
513 vc->vc_sw->con_putc(vc, new, oldy, oldx);
514 }
515 }
516
517 }
518
519 static void insert_char(struct vc_data *vc, unsigned int nr)
520 {
521 unsigned short *p, *q = (unsigned short *)vc->vc_pos;
522
523 p = q + vc->vc_cols - nr - vc->vc_x;
524 while (--p >= q)
525 scr_writew(scr_readw(p), p + nr);
526 scr_memsetw(q, vc->vc_video_erase_char, nr * 2);
527 vc->vc_need_wrap = 0;
528 if (DO_UPDATE(vc)) {
529 unsigned short oldattr = vc->vc_attr;
530 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x, vc->vc_y, vc->vc_x + nr, 1,
531 vc->vc_cols - vc->vc_x - nr);
532 vc->vc_attr = vc->vc_video_erase_char >> 8;
533 while (nr--)
534 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y, vc->vc_x + nr);
535 vc->vc_attr = oldattr;
536 }
537 }
538
539 static void delete_char(struct vc_data *vc, unsigned int nr)
540 {
541 unsigned int i = vc->vc_x;
542 unsigned short *p = (unsigned short *)vc->vc_pos;
543
544 while (++i <= vc->vc_cols - nr) {
545 scr_writew(scr_readw(p+nr), p);
546 p++;
547 }
548 scr_memsetw(p, vc->vc_video_erase_char, nr * 2);
549 vc->vc_need_wrap = 0;
550 if (DO_UPDATE(vc)) {
551 unsigned short oldattr = vc->vc_attr;
552 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x + nr, vc->vc_y, vc->vc_x, 1,
553 vc->vc_cols - vc->vc_x - nr);
554 vc->vc_attr = vc->vc_video_erase_char >> 8;
555 while (nr--)
556 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y,
557 vc->vc_cols - 1 - nr);
558 vc->vc_attr = oldattr;
559 }
560 }
561
562 static int softcursor_original;
563
564 static void add_softcursor(struct vc_data *vc)
565 {
566 int i = scr_readw((u16 *) vc->vc_pos);
567 u32 type = vc->vc_cursor_type;
568
569 if (! (type & 0x10)) return;
570 if (softcursor_original != -1) return;
571 softcursor_original = i;
572 i |= ((type >> 8) & 0xff00 );
573 i ^= ((type) & 0xff00 );
574 if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000;
575 if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700;
576 scr_writew(i, (u16 *) vc->vc_pos);
577 if (DO_UPDATE(vc))
578 vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x);
579 }
580
581 static void hide_softcursor(struct vc_data *vc)
582 {
583 if (softcursor_original != -1) {
584 scr_writew(softcursor_original, (u16 *)vc->vc_pos);
585 if (DO_UPDATE(vc))
586 vc->vc_sw->con_putc(vc, softcursor_original,
587 vc->vc_y, vc->vc_x);
588 softcursor_original = -1;
589 }
590 }
591
592 static void hide_cursor(struct vc_data *vc)
593 {
594 if (vc == sel_cons)
595 clear_selection();
596 vc->vc_sw->con_cursor(vc, CM_ERASE);
597 hide_softcursor(vc);
598 }
599
600 static void set_cursor(struct vc_data *vc)
601 {
602 if (!IS_FG(vc) || console_blanked ||
603 vc->vc_mode == KD_GRAPHICS)
604 return;
605 if (vc->vc_deccm) {
606 if (vc == sel_cons)
607 clear_selection();
608 add_softcursor(vc);
609 if ((vc->vc_cursor_type & 0x0f) != 1)
610 vc->vc_sw->con_cursor(vc, CM_DRAW);
611 } else
612 hide_cursor(vc);
613 }
614
615 static void set_origin(struct vc_data *vc)
616 {
617 WARN_CONSOLE_UNLOCKED();
618
619 if (!CON_IS_VISIBLE(vc) ||
620 !vc->vc_sw->con_set_origin ||
621 !vc->vc_sw->con_set_origin(vc))
622 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
623 vc->vc_visible_origin = vc->vc_origin;
624 vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size;
625 vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x;
626 }
627
628 static inline void save_screen(struct vc_data *vc)
629 {
630 WARN_CONSOLE_UNLOCKED();
631
632 if (vc->vc_sw->con_save_screen)
633 vc->vc_sw->con_save_screen(vc);
634 }
635
636 /*
637 * Redrawing of screen
638 */
639
640 static void clear_buffer_attributes(struct vc_data *vc)
641 {
642 unsigned short *p = (unsigned short *)vc->vc_origin;
643 int count = vc->vc_screenbuf_size / 2;
644 int mask = vc->vc_hi_font_mask | 0xff;
645
646 for (; count > 0; count--, p++) {
647 scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p);
648 }
649 }
650
651 void redraw_screen(struct vc_data *vc, int is_switch)
652 {
653 int redraw = 0;
654
655 WARN_CONSOLE_UNLOCKED();
656
657 if (!vc) {
658 /* strange ... */
659 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
660 return;
661 }
662
663 if (is_switch) {
664 struct vc_data *old_vc = vc_cons[fg_console].d;
665 if (old_vc == vc)
666 return;
667 if (!CON_IS_VISIBLE(vc))
668 redraw = 1;
669 *vc->vc_display_fg = vc;
670 fg_console = vc->vc_num;
671 hide_cursor(old_vc);
672 if (!CON_IS_VISIBLE(old_vc)) {
673 save_screen(old_vc);
674 set_origin(old_vc);
675 }
676 } else {
677 hide_cursor(vc);
678 redraw = 1;
679 }
680
681 if (redraw) {
682 int update;
683 int old_was_color = vc->vc_can_do_color;
684
685 set_origin(vc);
686 update = vc->vc_sw->con_switch(vc);
687 set_palette(vc);
688 /*
689 * If console changed from mono<->color, the best we can do
690 * is to clear the buffer attributes. As it currently stands,
691 * rebuilding new attributes from the old buffer is not doable
692 * without overly complex code.
693 */
694 if (old_was_color != vc->vc_can_do_color) {
695 update_attr(vc);
696 clear_buffer_attributes(vc);
697 }
698 if (update && vc->vc_mode != KD_GRAPHICS)
699 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
700 }
701 set_cursor(vc);
702 if (is_switch) {
703 set_leds();
704 compute_shiftstate();
705 notify_update(vc);
706 }
707 }
708
709 /*
710 * Allocation, freeing and resizing of VTs.
711 */
712
713 int vc_cons_allocated(unsigned int i)
714 {
715 return (i < MAX_NR_CONSOLES && vc_cons[i].d);
716 }
717
718 static void visual_init(struct vc_data *vc, int num, int init)
719 {
720 /* ++Geert: vc->vc_sw->con_init determines console size */
721 if (vc->vc_sw)
722 module_put(vc->vc_sw->owner);
723 vc->vc_sw = conswitchp;
724 #ifndef VT_SINGLE_DRIVER
725 if (con_driver_map[num])
726 vc->vc_sw = con_driver_map[num];
727 #endif
728 __module_get(vc->vc_sw->owner);
729 vc->vc_num = num;
730 vc->vc_display_fg = &master_display_fg;
731 vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir;
732 vc->vc_uni_pagedir = 0;
733 vc->vc_hi_font_mask = 0;
734 vc->vc_complement_mask = 0;
735 vc->vc_can_do_color = 0;
736 vc->vc_sw->con_init(vc, init);
737 if (!vc->vc_complement_mask)
738 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
739 vc->vc_s_complement_mask = vc->vc_complement_mask;
740 vc->vc_size_row = vc->vc_cols << 1;
741 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
742 }
743
744 int vc_allocate(unsigned int currcons) /* return 0 on success */
745 {
746 WARN_CONSOLE_UNLOCKED();
747
748 if (currcons >= MAX_NR_CONSOLES)
749 return -ENXIO;
750 if (!vc_cons[currcons].d) {
751 struct vc_data *vc;
752 struct vt_notifier_param param;
753
754 /* prevent users from taking too much memory */
755 if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE))
756 return -EPERM;
757
758 /* due to the granularity of kmalloc, we waste some memory here */
759 /* the alloc is done in two steps, to optimize the common situation
760 of a 25x80 console (structsize=216, screenbuf_size=4000) */
761 /* although the numbers above are not valid since long ago, the
762 point is still up-to-date and the comment still has its value
763 even if only as a historical artifact. --mj, July 1998 */
764 param.vc = vc = kzalloc(sizeof(struct vc_data), GFP_KERNEL);
765 if (!vc)
766 return -ENOMEM;
767 vc_cons[currcons].d = vc;
768 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
769 visual_init(vc, currcons, 1);
770 if (!*vc->vc_uni_pagedir_loc)
771 con_set_default_unimap(vc);
772 vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL);
773 if (!vc->vc_screenbuf) {
774 kfree(vc);
775 vc_cons[currcons].d = NULL;
776 return -ENOMEM;
777 }
778 vc_init(vc, vc->vc_rows, vc->vc_cols, 1);
779 vcs_make_sysfs(currcons);
780 atomic_notifier_call_chain(&vt_notifier_list, VT_ALLOCATE, &param);
781 }
782 return 0;
783 }
784
785 static inline int resize_screen(struct vc_data *vc, int width, int height,
786 int user)
787 {
788 /* Resizes the resolution of the display adapater */
789 int err = 0;
790
791 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize)
792 err = vc->vc_sw->con_resize(vc, width, height, user);
793
794 return err;
795 }
796
797 /*
798 * Change # of rows and columns (0 means unchanged/the size of fg_console)
799 * [this is to be used together with some user program
800 * like resize that changes the hardware videomode]
801 */
802 #define VC_RESIZE_MAXCOL (32767)
803 #define VC_RESIZE_MAXROW (32767)
804
805 /**
806 * vc_do_resize - resizing method for the tty
807 * @tty: tty being resized
808 * @real_tty: real tty (different to tty if a pty/tty pair)
809 * @vc: virtual console private data
810 * @cols: columns
811 * @lines: lines
812 *
813 * Resize a virtual console, clipping according to the actual constraints.
814 * If the caller passes a tty structure then update the termios winsize
815 * information and perform any neccessary signal handling.
816 *
817 * Caller must hold the console semaphore. Takes the termios mutex and
818 * ctrl_lock of the tty IFF a tty is passed.
819 */
820
821 static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc,
822 unsigned int cols, unsigned int lines)
823 {
824 unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0;
825 unsigned int old_cols, old_rows, old_row_size, old_screen_size;
826 unsigned int new_cols, new_rows, new_row_size, new_screen_size;
827 unsigned int end, user;
828 unsigned short *newscreen;
829
830 WARN_CONSOLE_UNLOCKED();
831
832 if (!vc)
833 return -ENXIO;
834
835 user = vc->vc_resize_user;
836 vc->vc_resize_user = 0;
837
838 if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW)
839 return -EINVAL;
840
841 new_cols = (cols ? cols : vc->vc_cols);
842 new_rows = (lines ? lines : vc->vc_rows);
843 new_row_size = new_cols << 1;
844 new_screen_size = new_row_size * new_rows;
845
846 if (new_cols == vc->vc_cols && new_rows == vc->vc_rows)
847 return 0;
848
849 newscreen = kmalloc(new_screen_size, GFP_USER);
850 if (!newscreen)
851 return -ENOMEM;
852
853 old_rows = vc->vc_rows;
854 old_cols = vc->vc_cols;
855 old_row_size = vc->vc_size_row;
856 old_screen_size = vc->vc_screenbuf_size;
857
858 err = resize_screen(vc, new_cols, new_rows, user);
859 if (err) {
860 kfree(newscreen);
861 return err;
862 }
863
864 vc->vc_rows = new_rows;
865 vc->vc_cols = new_cols;
866 vc->vc_size_row = new_row_size;
867 vc->vc_screenbuf_size = new_screen_size;
868
869 rlth = min(old_row_size, new_row_size);
870 rrem = new_row_size - rlth;
871 old_origin = vc->vc_origin;
872 new_origin = (long) newscreen;
873 new_scr_end = new_origin + new_screen_size;
874
875 if (vc->vc_y > new_rows) {
876 if (old_rows - vc->vc_y < new_rows) {
877 /*
878 * Cursor near the bottom, copy contents from the
879 * bottom of buffer
880 */
881 old_origin += (old_rows - new_rows) * old_row_size;
882 end = vc->vc_scr_end;
883 } else {
884 /*
885 * Cursor is in no man's land, copy 1/2 screenful
886 * from the top and bottom of cursor position
887 */
888 old_origin += (vc->vc_y - new_rows/2) * old_row_size;
889 end = old_origin + (old_row_size * new_rows);
890 }
891 } else
892 /*
893 * Cursor near the top, copy contents from the top of buffer
894 */
895 end = (old_rows > new_rows) ? old_origin +
896 (old_row_size * new_rows) :
897 vc->vc_scr_end;
898
899 update_attr(vc);
900
901 while (old_origin < end) {
902 scr_memcpyw((unsigned short *) new_origin,
903 (unsigned short *) old_origin, rlth);
904 if (rrem)
905 scr_memsetw((void *)(new_origin + rlth),
906 vc->vc_video_erase_char, rrem);
907 old_origin += old_row_size;
908 new_origin += new_row_size;
909 }
910 if (new_scr_end > new_origin)
911 scr_memsetw((void *)new_origin, vc->vc_video_erase_char,
912 new_scr_end - new_origin);
913 kfree(vc->vc_screenbuf);
914 vc->vc_screenbuf = newscreen;
915 vc->vc_screenbuf_size = new_screen_size;
916 set_origin(vc);
917
918 /* do part of a reset_terminal() */
919 vc->vc_top = 0;
920 vc->vc_bottom = vc->vc_rows;
921 gotoxy(vc, vc->vc_x, vc->vc_y);
922 save_cur(vc);
923
924 if (tty) {
925 /* Rewrite the requested winsize data with the actual
926 resulting sizes */
927 struct winsize ws;
928 memset(&ws, 0, sizeof(ws));
929 ws.ws_row = vc->vc_rows;
930 ws.ws_col = vc->vc_cols;
931 ws.ws_ypixel = vc->vc_scan_lines;
932 tty_do_resize(tty, &ws);
933 }
934
935 if (CON_IS_VISIBLE(vc))
936 update_screen(vc);
937 vt_event_post(VT_EVENT_RESIZE, vc->vc_num, vc->vc_num);
938 return err;
939 }
940
941 /**
942 * vc_resize - resize a VT
943 * @vc: virtual console
944 * @cols: columns
945 * @rows: rows
946 *
947 * Resize a virtual console as seen from the console end of things. We
948 * use the common vc_do_resize methods to update the structures. The
949 * caller must hold the console sem to protect console internals and
950 * vc->vc_tty
951 */
952
953 int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int rows)
954 {
955 return vc_do_resize(vc->vc_tty, vc, cols, rows);
956 }
957
958 /**
959 * vt_resize - resize a VT
960 * @tty: tty to resize
961 * @ws: winsize attributes
962 *
963 * Resize a virtual terminal. This is called by the tty layer as we
964 * register our own handler for resizing. The mutual helper does all
965 * the actual work.
966 *
967 * Takes the console sem and the called methods then take the tty
968 * termios_mutex and the tty ctrl_lock in that order.
969 */
970 static int vt_resize(struct tty_struct *tty, struct winsize *ws)
971 {
972 struct vc_data *vc = tty->driver_data;
973 int ret;
974
975 acquire_console_sem();
976 ret = vc_do_resize(tty, vc, ws->ws_col, ws->ws_row);
977 release_console_sem();
978 return ret;
979 }
980
981 void vc_deallocate(unsigned int currcons)
982 {
983 WARN_CONSOLE_UNLOCKED();
984
985 if (vc_cons_allocated(currcons)) {
986 struct vc_data *vc = vc_cons[currcons].d;
987 struct vt_notifier_param param = { .vc = vc };
988
989 atomic_notifier_call_chain(&vt_notifier_list, VT_DEALLOCATE, &param);
990 vcs_remove_sysfs(currcons);
991 vc->vc_sw->con_deinit(vc);
992 put_pid(vc->vt_pid);
993 module_put(vc->vc_sw->owner);
994 kfree(vc->vc_screenbuf);
995 if (currcons >= MIN_NR_CONSOLES)
996 kfree(vc);
997 vc_cons[currcons].d = NULL;
998 }
999 }
1000
1001 /*
1002 * VT102 emulator
1003 */
1004
1005 #define set_kbd(vc, x) set_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1006 #define clr_kbd(vc, x) clr_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1007 #define is_kbd(vc, x) vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1008
1009 #define decarm VC_REPEAT
1010 #define decckm VC_CKMODE
1011 #define kbdapplic VC_APPLIC
1012 #define lnm VC_CRLF
1013
1014 /*
1015 * this is what the terminal answers to a ESC-Z or csi0c query.
1016 */
1017 #define VT100ID "\033[?1;2c"
1018 #define VT102ID "\033[?6c"
1019
1020 unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7,
1021 8,12,10,14, 9,13,11,15 };
1022
1023 /* the default colour table, for VGA+ colour systems */
1024 int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
1025 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
1026 int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
1027 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
1028 int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
1029 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
1030
1031 module_param_array(default_red, int, NULL, S_IRUGO | S_IWUSR);
1032 module_param_array(default_grn, int, NULL, S_IRUGO | S_IWUSR);
1033 module_param_array(default_blu, int, NULL, S_IRUGO | S_IWUSR);
1034
1035 /*
1036 * gotoxy() must verify all boundaries, because the arguments
1037 * might also be negative. If the given position is out of
1038 * bounds, the cursor is placed at the nearest margin.
1039 */
1040 static void gotoxy(struct vc_data *vc, int new_x, int new_y)
1041 {
1042 int min_y, max_y;
1043
1044 if (new_x < 0)
1045 vc->vc_x = 0;
1046 else {
1047 if (new_x >= vc->vc_cols)
1048 vc->vc_x = vc->vc_cols - 1;
1049 else
1050 vc->vc_x = new_x;
1051 }
1052
1053 if (vc->vc_decom) {
1054 min_y = vc->vc_top;
1055 max_y = vc->vc_bottom;
1056 } else {
1057 min_y = 0;
1058 max_y = vc->vc_rows;
1059 }
1060 if (new_y < min_y)
1061 vc->vc_y = min_y;
1062 else if (new_y >= max_y)
1063 vc->vc_y = max_y - 1;
1064 else
1065 vc->vc_y = new_y;
1066 vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1);
1067 vc->vc_need_wrap = 0;
1068 }
1069
1070 /* for absolute user moves, when decom is set */
1071 static void gotoxay(struct vc_data *vc, int new_x, int new_y)
1072 {
1073 gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y);
1074 }
1075
1076 void scrollback(struct vc_data *vc, int lines)
1077 {
1078 if (!lines)
1079 lines = vc->vc_rows / 2;
1080 scrolldelta(-lines);
1081 }
1082
1083 void scrollfront(struct vc_data *vc, int lines)
1084 {
1085 if (!lines)
1086 lines = vc->vc_rows / 2;
1087 scrolldelta(lines);
1088 }
1089
1090 static void lf(struct vc_data *vc)
1091 {
1092 /* don't scroll if above bottom of scrolling region, or
1093 * if below scrolling region
1094 */
1095 if (vc->vc_y + 1 == vc->vc_bottom)
1096 scrup(vc, vc->vc_top, vc->vc_bottom, 1);
1097 else if (vc->vc_y < vc->vc_rows - 1) {
1098 vc->vc_y++;
1099 vc->vc_pos += vc->vc_size_row;
1100 }
1101 vc->vc_need_wrap = 0;
1102 notify_write(vc, '\n');
1103 }
1104
1105 static void ri(struct vc_data *vc)
1106 {
1107 /* don't scroll if below top of scrolling region, or
1108 * if above scrolling region
1109 */
1110 if (vc->vc_y == vc->vc_top)
1111 scrdown(vc, vc->vc_top, vc->vc_bottom, 1);
1112 else if (vc->vc_y > 0) {
1113 vc->vc_y--;
1114 vc->vc_pos -= vc->vc_size_row;
1115 }
1116 vc->vc_need_wrap = 0;
1117 }
1118
1119 static inline void cr(struct vc_data *vc)
1120 {
1121 vc->vc_pos -= vc->vc_x << 1;
1122 vc->vc_need_wrap = vc->vc_x = 0;
1123 notify_write(vc, '\r');
1124 }
1125
1126 static inline void bs(struct vc_data *vc)
1127 {
1128 if (vc->vc_x) {
1129 vc->vc_pos -= 2;
1130 vc->vc_x--;
1131 vc->vc_need_wrap = 0;
1132 notify_write(vc, '\b');
1133 }
1134 }
1135
1136 static inline void del(struct vc_data *vc)
1137 {
1138 /* ignored */
1139 }
1140
1141 static void csi_J(struct vc_data *vc, int vpar)
1142 {
1143 unsigned int count;
1144 unsigned short * start;
1145
1146 switch (vpar) {
1147 case 0: /* erase from cursor to end of display */
1148 count = (vc->vc_scr_end - vc->vc_pos) >> 1;
1149 start = (unsigned short *)vc->vc_pos;
1150 if (DO_UPDATE(vc)) {
1151 /* do in two stages */
1152 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1153 vc->vc_cols - vc->vc_x);
1154 vc->vc_sw->con_clear(vc, vc->vc_y + 1, 0,
1155 vc->vc_rows - vc->vc_y - 1,
1156 vc->vc_cols);
1157 }
1158 break;
1159 case 1: /* erase from start to cursor */
1160 count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1;
1161 start = (unsigned short *)vc->vc_origin;
1162 if (DO_UPDATE(vc)) {
1163 /* do in two stages */
1164 vc->vc_sw->con_clear(vc, 0, 0, vc->vc_y,
1165 vc->vc_cols);
1166 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1167 vc->vc_x + 1);
1168 }
1169 break;
1170 case 2: /* erase whole display */
1171 count = vc->vc_cols * vc->vc_rows;
1172 start = (unsigned short *)vc->vc_origin;
1173 if (DO_UPDATE(vc))
1174 vc->vc_sw->con_clear(vc, 0, 0,
1175 vc->vc_rows,
1176 vc->vc_cols);
1177 break;
1178 default:
1179 return;
1180 }
1181 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1182 vc->vc_need_wrap = 0;
1183 }
1184
1185 static void csi_K(struct vc_data *vc, int vpar)
1186 {
1187 unsigned int count;
1188 unsigned short * start;
1189
1190 switch (vpar) {
1191 case 0: /* erase from cursor to end of line */
1192 count = vc->vc_cols - vc->vc_x;
1193 start = (unsigned short *)vc->vc_pos;
1194 if (DO_UPDATE(vc))
1195 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1196 vc->vc_cols - vc->vc_x);
1197 break;
1198 case 1: /* erase from start of line to cursor */
1199 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1200 count = vc->vc_x + 1;
1201 if (DO_UPDATE(vc))
1202 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1203 vc->vc_x + 1);
1204 break;
1205 case 2: /* erase whole line */
1206 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1207 count = vc->vc_cols;
1208 if (DO_UPDATE(vc))
1209 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1210 vc->vc_cols);
1211 break;
1212 default:
1213 return;
1214 }
1215 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1216 vc->vc_need_wrap = 0;
1217 }
1218
1219 static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */
1220 { /* not vt100? */
1221 int count;
1222
1223 if (!vpar)
1224 vpar++;
1225 count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar;
1226
1227 scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count);
1228 if (DO_UPDATE(vc))
1229 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count);
1230 vc->vc_need_wrap = 0;
1231 }
1232
1233 static void default_attr(struct vc_data *vc)
1234 {
1235 vc->vc_intensity = 1;
1236 vc->vc_italic = 0;
1237 vc->vc_underline = 0;
1238 vc->vc_reverse = 0;
1239 vc->vc_blink = 0;
1240 vc->vc_color = vc->vc_def_color;
1241 }
1242
1243 /* console_sem is held */
1244 static void csi_m(struct vc_data *vc)
1245 {
1246 int i;
1247
1248 for (i = 0; i <= vc->vc_npar; i++)
1249 switch (vc->vc_par[i]) {
1250 case 0: /* all attributes off */
1251 default_attr(vc);
1252 break;
1253 case 1:
1254 vc->vc_intensity = 2;
1255 break;
1256 case 2:
1257 vc->vc_intensity = 0;
1258 break;
1259 case 3:
1260 vc->vc_italic = 1;
1261 break;
1262 case 4:
1263 vc->vc_underline = 1;
1264 break;
1265 case 5:
1266 vc->vc_blink = 1;
1267 break;
1268 case 7:
1269 vc->vc_reverse = 1;
1270 break;
1271 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1272 * Select primary font, don't display
1273 * control chars if defined, don't set
1274 * bit 8 on output.
1275 */
1276 vc->vc_translate = set_translate(vc->vc_charset == 0
1277 ? vc->vc_G0_charset
1278 : vc->vc_G1_charset, vc);
1279 vc->vc_disp_ctrl = 0;
1280 vc->vc_toggle_meta = 0;
1281 break;
1282 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1283 * Select first alternate font, lets
1284 * chars < 32 be displayed as ROM chars.
1285 */
1286 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1287 vc->vc_disp_ctrl = 1;
1288 vc->vc_toggle_meta = 0;
1289 break;
1290 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1291 * Select second alternate font, toggle
1292 * high bit before displaying as ROM char.
1293 */
1294 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1295 vc->vc_disp_ctrl = 1;
1296 vc->vc_toggle_meta = 1;
1297 break;
1298 case 21:
1299 case 22:
1300 vc->vc_intensity = 1;
1301 break;
1302 case 23:
1303 vc->vc_italic = 0;
1304 break;
1305 case 24:
1306 vc->vc_underline = 0;
1307 break;
1308 case 25:
1309 vc->vc_blink = 0;
1310 break;
1311 case 27:
1312 vc->vc_reverse = 0;
1313 break;
1314 case 38: /* ANSI X3.64-1979 (SCO-ish?)
1315 * Enables underscore, white foreground
1316 * with white underscore (Linux - use
1317 * default foreground).
1318 */
1319 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1320 vc->vc_underline = 1;
1321 break;
1322 case 39: /* ANSI X3.64-1979 (SCO-ish?)
1323 * Disable underline option.
1324 * Reset colour to default? It did this
1325 * before...
1326 */
1327 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1328 vc->vc_underline = 0;
1329 break;
1330 case 49:
1331 vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f);
1332 break;
1333 default:
1334 if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37)
1335 vc->vc_color = color_table[vc->vc_par[i] - 30]
1336 | (vc->vc_color & 0xf0);
1337 else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47)
1338 vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4)
1339 | (vc->vc_color & 0x0f);
1340 break;
1341 }
1342 update_attr(vc);
1343 }
1344
1345 static void respond_string(const char *p, struct tty_struct *tty)
1346 {
1347 while (*p) {
1348 tty_insert_flip_char(tty, *p, 0);
1349 p++;
1350 }
1351 con_schedule_flip(tty);
1352 }
1353
1354 static void cursor_report(struct vc_data *vc, struct tty_struct *tty)
1355 {
1356 char buf[40];
1357
1358 sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1);
1359 respond_string(buf, tty);
1360 }
1361
1362 static inline void status_report(struct tty_struct *tty)
1363 {
1364 respond_string("\033[0n", tty); /* Terminal ok */
1365 }
1366
1367 static inline void respond_ID(struct tty_struct * tty)
1368 {
1369 respond_string(VT102ID, tty);
1370 }
1371
1372 void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry)
1373 {
1374 char buf[8];
1375
1376 sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx),
1377 (char)('!' + mry));
1378 respond_string(buf, tty);
1379 }
1380
1381 /* invoked via ioctl(TIOCLINUX) and through set_selection */
1382 int mouse_reporting(void)
1383 {
1384 return vc_cons[fg_console].d->vc_report_mouse;
1385 }
1386
1387 /* console_sem is held */
1388 static void set_mode(struct vc_data *vc, int on_off)
1389 {
1390 int i;
1391
1392 for (i = 0; i <= vc->vc_npar; i++)
1393 if (vc->vc_ques) {
1394 switch(vc->vc_par[i]) { /* DEC private modes set/reset */
1395 case 1: /* Cursor keys send ^[Ox/^[[x */
1396 if (on_off)
1397 set_kbd(vc, decckm);
1398 else
1399 clr_kbd(vc, decckm);
1400 break;
1401 case 3: /* 80/132 mode switch unimplemented */
1402 vc->vc_deccolm = on_off;
1403 #if 0
1404 vc_resize(deccolm ? 132 : 80, vc->vc_rows);
1405 /* this alone does not suffice; some user mode
1406 utility has to change the hardware regs */
1407 #endif
1408 break;
1409 case 5: /* Inverted screen on/off */
1410 if (vc->vc_decscnm != on_off) {
1411 vc->vc_decscnm = on_off;
1412 invert_screen(vc, 0, vc->vc_screenbuf_size, 0);
1413 update_attr(vc);
1414 }
1415 break;
1416 case 6: /* Origin relative/absolute */
1417 vc->vc_decom = on_off;
1418 gotoxay(vc, 0, 0);
1419 break;
1420 case 7: /* Autowrap on/off */
1421 vc->vc_decawm = on_off;
1422 break;
1423 case 8: /* Autorepeat on/off */
1424 if (on_off)
1425 set_kbd(vc, decarm);
1426 else
1427 clr_kbd(vc, decarm);
1428 break;
1429 case 9:
1430 vc->vc_report_mouse = on_off ? 1 : 0;
1431 break;
1432 case 25: /* Cursor on/off */
1433 vc->vc_deccm = on_off;
1434 break;
1435 case 1000:
1436 vc->vc_report_mouse = on_off ? 2 : 0;
1437 break;
1438 }
1439 } else {
1440 switch(vc->vc_par[i]) { /* ANSI modes set/reset */
1441 case 3: /* Monitor (display ctrls) */
1442 vc->vc_disp_ctrl = on_off;
1443 break;
1444 case 4: /* Insert Mode on/off */
1445 vc->vc_decim = on_off;
1446 break;
1447 case 20: /* Lf, Enter == CrLf/Lf */
1448 if (on_off)
1449 set_kbd(vc, lnm);
1450 else
1451 clr_kbd(vc, lnm);
1452 break;
1453 }
1454 }
1455 }
1456
1457 /* console_sem is held */
1458 static void setterm_command(struct vc_data *vc)
1459 {
1460 switch(vc->vc_par[0]) {
1461 case 1: /* set color for underline mode */
1462 if (vc->vc_can_do_color &&
1463 vc->vc_par[1] < 16) {
1464 vc->vc_ulcolor = color_table[vc->vc_par[1]];
1465 if (vc->vc_underline)
1466 update_attr(vc);
1467 }
1468 break;
1469 case 2: /* set color for half intensity mode */
1470 if (vc->vc_can_do_color &&
1471 vc->vc_par[1] < 16) {
1472 vc->vc_halfcolor = color_table[vc->vc_par[1]];
1473 if (vc->vc_intensity == 0)
1474 update_attr(vc);
1475 }
1476 break;
1477 case 8: /* store colors as defaults */
1478 vc->vc_def_color = vc->vc_attr;
1479 if (vc->vc_hi_font_mask == 0x100)
1480 vc->vc_def_color >>= 1;
1481 default_attr(vc);
1482 update_attr(vc);
1483 break;
1484 case 9: /* set blanking interval */
1485 blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60;
1486 poke_blanked_console();
1487 break;
1488 case 10: /* set bell frequency in Hz */
1489 if (vc->vc_npar >= 1)
1490 vc->vc_bell_pitch = vc->vc_par[1];
1491 else
1492 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1493 break;
1494 case 11: /* set bell duration in msec */
1495 if (vc->vc_npar >= 1)
1496 vc->vc_bell_duration = (vc->vc_par[1] < 2000) ?
1497 vc->vc_par[1] * HZ / 1000 : 0;
1498 else
1499 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1500 break;
1501 case 12: /* bring specified console to the front */
1502 if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1))
1503 set_console(vc->vc_par[1] - 1);
1504 break;
1505 case 13: /* unblank the screen */
1506 poke_blanked_console();
1507 break;
1508 case 14: /* set vesa powerdown interval */
1509 vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1510 break;
1511 case 15: /* activate the previous console */
1512 set_console(last_console);
1513 break;
1514 }
1515 }
1516
1517 /* console_sem is held */
1518 static void csi_at(struct vc_data *vc, unsigned int nr)
1519 {
1520 if (nr > vc->vc_cols - vc->vc_x)
1521 nr = vc->vc_cols - vc->vc_x;
1522 else if (!nr)
1523 nr = 1;
1524 insert_char(vc, nr);
1525 }
1526
1527 /* console_sem is held */
1528 static void csi_L(struct vc_data *vc, unsigned int nr)
1529 {
1530 if (nr > vc->vc_rows - vc->vc_y)
1531 nr = vc->vc_rows - vc->vc_y;
1532 else if (!nr)
1533 nr = 1;
1534 scrdown(vc, vc->vc_y, vc->vc_bottom, nr);
1535 vc->vc_need_wrap = 0;
1536 }
1537
1538 /* console_sem is held */
1539 static void csi_P(struct vc_data *vc, unsigned int nr)
1540 {
1541 if (nr > vc->vc_cols - vc->vc_x)
1542 nr = vc->vc_cols - vc->vc_x;
1543 else if (!nr)
1544 nr = 1;
1545 delete_char(vc, nr);
1546 }
1547
1548 /* console_sem is held */
1549 static void csi_M(struct vc_data *vc, unsigned int nr)
1550 {
1551 if (nr > vc->vc_rows - vc->vc_y)
1552 nr = vc->vc_rows - vc->vc_y;
1553 else if (!nr)
1554 nr=1;
1555 scrup(vc, vc->vc_y, vc->vc_bottom, nr);
1556 vc->vc_need_wrap = 0;
1557 }
1558
1559 /* console_sem is held (except via vc_init->reset_terminal */
1560 static void save_cur(struct vc_data *vc)
1561 {
1562 vc->vc_saved_x = vc->vc_x;
1563 vc->vc_saved_y = vc->vc_y;
1564 vc->vc_s_intensity = vc->vc_intensity;
1565 vc->vc_s_italic = vc->vc_italic;
1566 vc->vc_s_underline = vc->vc_underline;
1567 vc->vc_s_blink = vc->vc_blink;
1568 vc->vc_s_reverse = vc->vc_reverse;
1569 vc->vc_s_charset = vc->vc_charset;
1570 vc->vc_s_color = vc->vc_color;
1571 vc->vc_saved_G0 = vc->vc_G0_charset;
1572 vc->vc_saved_G1 = vc->vc_G1_charset;
1573 }
1574
1575 /* console_sem is held */
1576 static void restore_cur(struct vc_data *vc)
1577 {
1578 gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y);
1579 vc->vc_intensity = vc->vc_s_intensity;
1580 vc->vc_italic = vc->vc_s_italic;
1581 vc->vc_underline = vc->vc_s_underline;
1582 vc->vc_blink = vc->vc_s_blink;
1583 vc->vc_reverse = vc->vc_s_reverse;
1584 vc->vc_charset = vc->vc_s_charset;
1585 vc->vc_color = vc->vc_s_color;
1586 vc->vc_G0_charset = vc->vc_saved_G0;
1587 vc->vc_G1_charset = vc->vc_saved_G1;
1588 vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc);
1589 update_attr(vc);
1590 vc->vc_need_wrap = 0;
1591 }
1592
1593 enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey,
1594 EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd,
1595 ESpalette };
1596
1597 /* console_sem is held (except via vc_init()) */
1598 static void reset_terminal(struct vc_data *vc, int do_clear)
1599 {
1600 vc->vc_top = 0;
1601 vc->vc_bottom = vc->vc_rows;
1602 vc->vc_state = ESnormal;
1603 vc->vc_ques = 0;
1604 vc->vc_translate = set_translate(LAT1_MAP, vc);
1605 vc->vc_G0_charset = LAT1_MAP;
1606 vc->vc_G1_charset = GRAF_MAP;
1607 vc->vc_charset = 0;
1608 vc->vc_need_wrap = 0;
1609 vc->vc_report_mouse = 0;
1610 vc->vc_utf = default_utf8;
1611 vc->vc_utf_count = 0;
1612
1613 vc->vc_disp_ctrl = 0;
1614 vc->vc_toggle_meta = 0;
1615
1616 vc->vc_decscnm = 0;
1617 vc->vc_decom = 0;
1618 vc->vc_decawm = 1;
1619 vc->vc_deccm = 1;
1620 vc->vc_decim = 0;
1621
1622 set_kbd(vc, decarm);
1623 clr_kbd(vc, decckm);
1624 clr_kbd(vc, kbdapplic);
1625 clr_kbd(vc, lnm);
1626 kbd_table[vc->vc_num].lockstate = 0;
1627 kbd_table[vc->vc_num].slockstate = 0;
1628 kbd_table[vc->vc_num].ledmode = LED_SHOW_FLAGS;
1629 kbd_table[vc->vc_num].ledflagstate = kbd_table[vc->vc_num].default_ledflagstate;
1630 /* do not do set_leds here because this causes an endless tasklet loop
1631 when the keyboard hasn't been initialized yet */
1632
1633 vc->vc_cursor_type = CUR_DEFAULT;
1634 vc->vc_complement_mask = vc->vc_s_complement_mask;
1635
1636 default_attr(vc);
1637 update_attr(vc);
1638
1639 vc->vc_tab_stop[0] = 0x01010100;
1640 vc->vc_tab_stop[1] =
1641 vc->vc_tab_stop[2] =
1642 vc->vc_tab_stop[3] =
1643 vc->vc_tab_stop[4] =
1644 vc->vc_tab_stop[5] =
1645 vc->vc_tab_stop[6] =
1646 vc->vc_tab_stop[7] = 0x01010101;
1647
1648 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1649 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1650
1651 gotoxy(vc, 0, 0);
1652 save_cur(vc);
1653 if (do_clear)
1654 csi_J(vc, 2);
1655 }
1656
1657 /* console_sem is held */
1658 static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
1659 {
1660 /*
1661 * Control characters can be used in the _middle_
1662 * of an escape sequence.
1663 */
1664 switch (c) {
1665 case 0:
1666 return;
1667 case 7:
1668 if (vc->vc_bell_duration)
1669 kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration);
1670 return;
1671 case 8:
1672 bs(vc);
1673 return;
1674 case 9:
1675 vc->vc_pos -= (vc->vc_x << 1);
1676 while (vc->vc_x < vc->vc_cols - 1) {
1677 vc->vc_x++;
1678 if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31)))
1679 break;
1680 }
1681 vc->vc_pos += (vc->vc_x << 1);
1682 notify_write(vc, '\t');
1683 return;
1684 case 10: case 11: case 12:
1685 lf(vc);
1686 if (!is_kbd(vc, lnm))
1687 return;
1688 case 13:
1689 cr(vc);
1690 return;
1691 case 14:
1692 vc->vc_charset = 1;
1693 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1694 vc->vc_disp_ctrl = 1;
1695 return;
1696 case 15:
1697 vc->vc_charset = 0;
1698 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1699 vc->vc_disp_ctrl = 0;
1700 return;
1701 case 24: case 26:
1702 vc->vc_state = ESnormal;
1703 return;
1704 case 27:
1705 vc->vc_state = ESesc;
1706 return;
1707 case 127:
1708 del(vc);
1709 return;
1710 case 128+27:
1711 vc->vc_state = ESsquare;
1712 return;
1713 }
1714 switch(vc->vc_state) {
1715 case ESesc:
1716 vc->vc_state = ESnormal;
1717 switch (c) {
1718 case '[':
1719 vc->vc_state = ESsquare;
1720 return;
1721 case ']':
1722 vc->vc_state = ESnonstd;
1723 return;
1724 case '%':
1725 vc->vc_state = ESpercent;
1726 return;
1727 case 'E':
1728 cr(vc);
1729 lf(vc);
1730 return;
1731 case 'M':
1732 ri(vc);
1733 return;
1734 case 'D':
1735 lf(vc);
1736 return;
1737 case 'H':
1738 vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31));
1739 return;
1740 case 'Z':
1741 respond_ID(tty);
1742 return;
1743 case '7':
1744 save_cur(vc);
1745 return;
1746 case '8':
1747 restore_cur(vc);
1748 return;
1749 case '(':
1750 vc->vc_state = ESsetG0;
1751 return;
1752 case ')':
1753 vc->vc_state = ESsetG1;
1754 return;
1755 case '#':
1756 vc->vc_state = EShash;
1757 return;
1758 case 'c':
1759 reset_terminal(vc, 1);
1760 return;
1761 case '>': /* Numeric keypad */
1762 clr_kbd(vc, kbdapplic);
1763 return;
1764 case '=': /* Appl. keypad */
1765 set_kbd(vc, kbdapplic);
1766 return;
1767 }
1768 return;
1769 case ESnonstd:
1770 if (c=='P') { /* palette escape sequence */
1771 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1772 vc->vc_par[vc->vc_npar] = 0;
1773 vc->vc_npar = 0;
1774 vc->vc_state = ESpalette;
1775 return;
1776 } else if (c=='R') { /* reset palette */
1777 reset_palette(vc);
1778 vc->vc_state = ESnormal;
1779 } else
1780 vc->vc_state = ESnormal;
1781 return;
1782 case ESpalette:
1783 if ( (c>='0'&&c<='9') || (c>='A'&&c<='F') || (c>='a'&&c<='f') ) {
1784 vc->vc_par[vc->vc_npar++] = (c > '9' ? (c & 0xDF) - 'A' + 10 : c - '0');
1785 if (vc->vc_npar == 7) {
1786 int i = vc->vc_par[0] * 3, j = 1;
1787 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1788 vc->vc_palette[i++] += vc->vc_par[j++];
1789 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1790 vc->vc_palette[i++] += vc->vc_par[j++];
1791 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1792 vc->vc_palette[i] += vc->vc_par[j];
1793 set_palette(vc);
1794 vc->vc_state = ESnormal;
1795 }
1796 } else
1797 vc->vc_state = ESnormal;
1798 return;
1799 case ESsquare:
1800 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1801 vc->vc_par[vc->vc_npar] = 0;
1802 vc->vc_npar = 0;
1803 vc->vc_state = ESgetpars;
1804 if (c == '[') { /* Function key */
1805 vc->vc_state=ESfunckey;
1806 return;
1807 }
1808 vc->vc_ques = (c == '?');
1809 if (vc->vc_ques)
1810 return;
1811 case ESgetpars:
1812 if (c == ';' && vc->vc_npar < NPAR - 1) {
1813 vc->vc_npar++;
1814 return;
1815 } else if (c>='0' && c<='9') {
1816 vc->vc_par[vc->vc_npar] *= 10;
1817 vc->vc_par[vc->vc_npar] += c - '0';
1818 return;
1819 } else
1820 vc->vc_state = ESgotpars;
1821 case ESgotpars:
1822 vc->vc_state = ESnormal;
1823 switch(c) {
1824 case 'h':
1825 set_mode(vc, 1);
1826 return;
1827 case 'l':
1828 set_mode(vc, 0);
1829 return;
1830 case 'c':
1831 if (vc->vc_ques) {
1832 if (vc->vc_par[0])
1833 vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16);
1834 else
1835 vc->vc_cursor_type = CUR_DEFAULT;
1836 return;
1837 }
1838 break;
1839 case 'm':
1840 if (vc->vc_ques) {
1841 clear_selection();
1842 if (vc->vc_par[0])
1843 vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1];
1844 else
1845 vc->vc_complement_mask = vc->vc_s_complement_mask;
1846 return;
1847 }
1848 break;
1849 case 'n':
1850 if (!vc->vc_ques) {
1851 if (vc->vc_par[0] == 5)
1852 status_report(tty);
1853 else if (vc->vc_par[0] == 6)
1854 cursor_report(vc, tty);
1855 }
1856 return;
1857 }
1858 if (vc->vc_ques) {
1859 vc->vc_ques = 0;
1860 return;
1861 }
1862 switch(c) {
1863 case 'G': case '`':
1864 if (vc->vc_par[0])
1865 vc->vc_par[0]--;
1866 gotoxy(vc, vc->vc_par[0], vc->vc_y);
1867 return;
1868 case 'A':
1869 if (!vc->vc_par[0])
1870 vc->vc_par[0]++;
1871 gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]);
1872 return;
1873 case 'B': case 'e':
1874 if (!vc->vc_par[0])
1875 vc->vc_par[0]++;
1876 gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]);
1877 return;
1878 case 'C': case 'a':
1879 if (!vc->vc_par[0])
1880 vc->vc_par[0]++;
1881 gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y);
1882 return;
1883 case 'D':
1884 if (!vc->vc_par[0])
1885 vc->vc_par[0]++;
1886 gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y);
1887 return;
1888 case 'E':
1889 if (!vc->vc_par[0])
1890 vc->vc_par[0]++;
1891 gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]);
1892 return;
1893 case 'F':
1894 if (!vc->vc_par[0])
1895 vc->vc_par[0]++;
1896 gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]);
1897 return;
1898 case 'd':
1899 if (vc->vc_par[0])
1900 vc->vc_par[0]--;
1901 gotoxay(vc, vc->vc_x ,vc->vc_par[0]);
1902 return;
1903 case 'H': case 'f':
1904 if (vc->vc_par[0])
1905 vc->vc_par[0]--;
1906 if (vc->vc_par[1])
1907 vc->vc_par[1]--;
1908 gotoxay(vc, vc->vc_par[1], vc->vc_par[0]);
1909 return;
1910 case 'J':
1911 csi_J(vc, vc->vc_par[0]);
1912 return;
1913 case 'K':
1914 csi_K(vc, vc->vc_par[0]);
1915 return;
1916 case 'L':
1917 csi_L(vc, vc->vc_par[0]);
1918 return;
1919 case 'M':
1920 csi_M(vc, vc->vc_par[0]);
1921 return;
1922 case 'P':
1923 csi_P(vc, vc->vc_par[0]);
1924 return;
1925 case 'c':
1926 if (!vc->vc_par[0])
1927 respond_ID(tty);
1928 return;
1929 case 'g':
1930 if (!vc->vc_par[0])
1931 vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31));
1932 else if (vc->vc_par[0] == 3) {
1933 vc->vc_tab_stop[0] =
1934 vc->vc_tab_stop[1] =
1935 vc->vc_tab_stop[2] =
1936 vc->vc_tab_stop[3] =
1937 vc->vc_tab_stop[4] =
1938 vc->vc_tab_stop[5] =
1939 vc->vc_tab_stop[6] =
1940 vc->vc_tab_stop[7] = 0;
1941 }
1942 return;
1943 case 'm':
1944 csi_m(vc);
1945 return;
1946 case 'q': /* DECLL - but only 3 leds */
1947 /* map 0,1,2,3 to 0,1,2,4 */
1948 if (vc->vc_par[0] < 4)
1949 setledstate(kbd_table + vc->vc_num,
1950 (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4);
1951 return;
1952 case 'r':
1953 if (!vc->vc_par[0])
1954 vc->vc_par[0]++;
1955 if (!vc->vc_par[1])
1956 vc->vc_par[1] = vc->vc_rows;
1957 /* Minimum allowed region is 2 lines */
1958 if (vc->vc_par[0] < vc->vc_par[1] &&
1959 vc->vc_par[1] <= vc->vc_rows) {
1960 vc->vc_top = vc->vc_par[0] - 1;
1961 vc->vc_bottom = vc->vc_par[1];
1962 gotoxay(vc, 0, 0);
1963 }
1964 return;
1965 case 's':
1966 save_cur(vc);
1967 return;
1968 case 'u':
1969 restore_cur(vc);
1970 return;
1971 case 'X':
1972 csi_X(vc, vc->vc_par[0]);
1973 return;
1974 case '@':
1975 csi_at(vc, vc->vc_par[0]);
1976 return;
1977 case ']': /* setterm functions */
1978 setterm_command(vc);
1979 return;
1980 }
1981 return;
1982 case ESpercent:
1983 vc->vc_state = ESnormal;
1984 switch (c) {
1985 case '@': /* defined in ISO 2022 */
1986 vc->vc_utf = 0;
1987 return;
1988 case 'G': /* prelim official escape code */
1989 case '8': /* retained for compatibility */
1990 vc->vc_utf = 1;
1991 return;
1992 }
1993 return;
1994 case ESfunckey:
1995 vc->vc_state = ESnormal;
1996 return;
1997 case EShash:
1998 vc->vc_state = ESnormal;
1999 if (c == '8') {
2000 /* DEC screen alignment test. kludge :-) */
2001 vc->vc_video_erase_char =
2002 (vc->vc_video_erase_char & 0xff00) | 'E';
2003 csi_J(vc, 2);
2004 vc->vc_video_erase_char =
2005 (vc->vc_video_erase_char & 0xff00) | ' ';
2006 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
2007 }
2008 return;
2009 case ESsetG0:
2010 if (c == '0')
2011 vc->vc_G0_charset = GRAF_MAP;
2012 else if (c == 'B')
2013 vc->vc_G0_charset = LAT1_MAP;
2014 else if (c == 'U')
2015 vc->vc_G0_charset = IBMPC_MAP;
2016 else if (c == 'K')
2017 vc->vc_G0_charset = USER_MAP;
2018 if (vc->vc_charset == 0)
2019 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
2020 vc->vc_state = ESnormal;
2021 return;
2022 case ESsetG1:
2023 if (c == '0')
2024 vc->vc_G1_charset = GRAF_MAP;
2025 else if (c == 'B')
2026 vc->vc_G1_charset = LAT1_MAP;
2027 else if (c == 'U')
2028 vc->vc_G1_charset = IBMPC_MAP;
2029 else if (c == 'K')
2030 vc->vc_G1_charset = USER_MAP;
2031 if (vc->vc_charset == 1)
2032 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
2033 vc->vc_state = ESnormal;
2034 return;
2035 default:
2036 vc->vc_state = ESnormal;
2037 }
2038 }
2039
2040 /* This is a temporary buffer used to prepare a tty console write
2041 * so that we can easily avoid touching user space while holding the
2042 * console spinlock. It is allocated in con_init and is shared by
2043 * this code and the vc_screen read/write tty calls.
2044 *
2045 * We have to allocate this statically in the kernel data section
2046 * since console_init (and thus con_init) are called before any
2047 * kernel memory allocation is available.
2048 */
2049 char con_buf[CON_BUF_SIZE];
2050 DEFINE_MUTEX(con_buf_mtx);
2051
2052 /* is_double_width() is based on the wcwidth() implementation by
2053 * Markus Kuhn -- 2007-05-26 (Unicode 5.0)
2054 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
2055 */
2056 struct interval {
2057 uint32_t first;
2058 uint32_t last;
2059 };
2060
2061 static int bisearch(uint32_t ucs, const struct interval *table, int max)
2062 {
2063 int min = 0;
2064 int mid;
2065
2066 if (ucs < table[0].first || ucs > table[max].last)
2067 return 0;
2068 while (max >= min) {
2069 mid = (min + max) / 2;
2070 if (ucs > table[mid].last)
2071 min = mid + 1;
2072 else if (ucs < table[mid].first)
2073 max = mid - 1;
2074 else
2075 return 1;
2076 }
2077 return 0;
2078 }
2079
2080 static int is_double_width(uint32_t ucs)
2081 {
2082 static const struct interval double_width[] = {
2083 { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E },
2084 { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF },
2085 { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 },
2086 { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD }
2087 };
2088 return bisearch(ucs, double_width, ARRAY_SIZE(double_width) - 1);
2089 }
2090
2091 /* acquires console_sem */
2092 static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2093 {
2094 #ifdef VT_BUF_VRAM_ONLY
2095 #define FLUSH do { } while(0);
2096 #else
2097 #define FLUSH if (draw_x >= 0) { \
2098 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
2099 draw_x = -1; \
2100 }
2101 #endif
2102
2103 int c, tc, ok, n = 0, draw_x = -1;
2104 unsigned int currcons;
2105 unsigned long draw_from = 0, draw_to = 0;
2106 struct vc_data *vc;
2107 unsigned char vc_attr;
2108 struct vt_notifier_param param;
2109 uint8_t rescan;
2110 uint8_t inverse;
2111 uint8_t width;
2112 u16 himask, charmask;
2113 const unsigned char *orig_buf = NULL;
2114 int orig_count;
2115
2116 if (in_interrupt())
2117 return count;
2118
2119 might_sleep();
2120
2121 acquire_console_sem();
2122 vc = tty->driver_data;
2123 if (vc == NULL) {
2124 printk(KERN_ERR "vt: argh, driver_data is NULL !\n");
2125 release_console_sem();
2126 return 0;
2127 }
2128
2129 currcons = vc->vc_num;
2130 if (!vc_cons_allocated(currcons)) {
2131 /* could this happen? */
2132 printk_once("con_write: tty %d not allocated\n", currcons+1);
2133 release_console_sem();
2134 return 0;
2135 }
2136 orig_buf = buf;
2137 orig_count = count;
2138
2139 himask = vc->vc_hi_font_mask;
2140 charmask = himask ? 0x1ff : 0xff;
2141
2142 /* undraw cursor first */
2143 if (IS_FG(vc))
2144 hide_cursor(vc);
2145
2146 param.vc = vc;
2147
2148 while (!tty->stopped && count) {
2149 int orig = *buf;
2150 c = orig;
2151 buf++;
2152 n++;
2153 count--;
2154 rescan = 0;
2155 inverse = 0;
2156 width = 1;
2157
2158 /* Do no translation at all in control states */
2159 if (vc->vc_state != ESnormal) {
2160 tc = c;
2161 } else if (vc->vc_utf && !vc->vc_disp_ctrl) {
2162 /* Combine UTF-8 into Unicode in vc_utf_char.
2163 * vc_utf_count is the number of continuation bytes still
2164 * expected to arrive.
2165 * vc_npar is the number of continuation bytes arrived so
2166 * far
2167 */
2168 rescan_last_byte:
2169 if ((c & 0xc0) == 0x80) {
2170 /* Continuation byte received */
2171 static const uint32_t utf8_length_changes[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff };
2172 if (vc->vc_utf_count) {
2173 vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f);
2174 vc->vc_npar++;
2175 if (--vc->vc_utf_count) {
2176 /* Still need some bytes */
2177 continue;
2178 }
2179 /* Got a whole character */
2180 c = vc->vc_utf_char;
2181 /* Reject overlong sequences */
2182 if (c <= utf8_length_changes[vc->vc_npar - 1] ||
2183 c > utf8_length_changes[vc->vc_npar])
2184 c = 0xfffd;
2185 } else {
2186 /* Unexpected continuation byte */
2187 vc->vc_utf_count = 0;
2188 c = 0xfffd;
2189 }
2190 } else {
2191 /* Single ASCII byte or first byte of a sequence received */
2192 if (vc->vc_utf_count) {
2193 /* Continuation byte expected */
2194 rescan = 1;
2195 vc->vc_utf_count = 0;
2196 c = 0xfffd;
2197 } else if (c > 0x7f) {
2198 /* First byte of a multibyte sequence received */
2199 vc->vc_npar = 0;
2200 if ((c & 0xe0) == 0xc0) {
2201 vc->vc_utf_count = 1;
2202 vc->vc_utf_char = (c & 0x1f);
2203 } else if ((c & 0xf0) == 0xe0) {
2204 vc->vc_utf_count = 2;
2205 vc->vc_utf_char = (c & 0x0f);
2206 } else if ((c & 0xf8) == 0xf0) {
2207 vc->vc_utf_count = 3;
2208 vc->vc_utf_char = (c & 0x07);
2209 } else if ((c & 0xfc) == 0xf8) {
2210 vc->vc_utf_count = 4;
2211 vc->vc_utf_char = (c & 0x03);
2212 } else if ((c & 0xfe) == 0xfc) {
2213 vc->vc_utf_count = 5;
2214 vc->vc_utf_char = (c & 0x01);
2215 } else {
2216 /* 254 and 255 are invalid */
2217 c = 0xfffd;
2218 }
2219 if (vc->vc_utf_count) {
2220 /* Still need some bytes */
2221 continue;
2222 }
2223 }
2224 /* Nothing to do if an ASCII byte was received */
2225 }
2226 /* End of UTF-8 decoding. */
2227 /* c is the received character, or U+FFFD for invalid sequences. */
2228 /* Replace invalid Unicode code points with U+FFFD too */
2229 if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff)
2230 c = 0xfffd;
2231 tc = c;
2232 } else { /* no utf or alternate charset mode */
2233 tc = vc_translate(vc, c);
2234 }
2235
2236 param.c = tc;
2237 if (atomic_notifier_call_chain(&vt_notifier_list, VT_PREWRITE,
2238 &param) == NOTIFY_STOP)
2239 continue;
2240
2241 /* If the original code was a control character we
2242 * only allow a glyph to be displayed if the code is
2243 * not normally used (such as for cursor movement) or
2244 * if the disp_ctrl mode has been explicitly enabled.
2245 * Certain characters (as given by the CTRL_ALWAYS
2246 * bitmap) are always displayed as control characters,
2247 * as the console would be pretty useless without
2248 * them; to display an arbitrary font position use the
2249 * direct-to-font zone in UTF-8 mode.
2250 */
2251 ok = tc && (c >= 32 ||
2252 !(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 :
2253 vc->vc_utf || ((CTRL_ACTION >> c) & 1)))
2254 && (c != 127 || vc->vc_disp_ctrl)
2255 && (c != 128+27);
2256
2257 if (vc->vc_state == ESnormal && ok) {
2258 if (vc->vc_utf && !vc->vc_disp_ctrl) {
2259 if (is_double_width(c))
2260 width = 2;
2261 }
2262 /* Now try to find out how to display it */
2263 tc = conv_uni_to_pc(vc, tc);
2264 if (tc & ~charmask) {
2265 if (tc == -1 || tc == -2) {
2266 continue; /* nothing to display */
2267 }
2268 /* Glyph not found */
2269 if ((!(vc->vc_utf && !vc->vc_disp_ctrl) || c < 128) && !(c & ~charmask)) {
2270 /* In legacy mode use the glyph we get by a 1:1 mapping.
2271 This would make absolutely no sense with Unicode in mind,
2272 but do this for ASCII characters since a font may lack
2273 Unicode mapping info and we don't want to end up with
2274 having question marks only. */
2275 tc = c;
2276 } else {
2277 /* Display U+FFFD. If it's not found, display an inverse question mark. */
2278 tc = conv_uni_to_pc(vc, 0xfffd);
2279 if (tc < 0) {
2280 inverse = 1;
2281 tc = conv_uni_to_pc(vc, '?');
2282 if (tc < 0) tc = '?';
2283 }
2284 }
2285 }
2286
2287 if (!inverse) {
2288 vc_attr = vc->vc_attr;
2289 } else {
2290 /* invert vc_attr */
2291 if (!vc->vc_can_do_color) {
2292 vc_attr = (vc->vc_attr) ^ 0x08;
2293 } else if (vc->vc_hi_font_mask == 0x100) {
2294 vc_attr = ((vc->vc_attr) & 0x11) | (((vc->vc_attr) & 0xe0) >> 4) | (((vc->vc_attr) & 0x0e) << 4);
2295 } else {
2296 vc_attr = ((vc->vc_attr) & 0x88) | (((vc->vc_attr) & 0x70) >> 4) | (((vc->vc_attr) & 0x07) << 4);
2297 }
2298 FLUSH
2299 }
2300
2301 while (1) {
2302 if (vc->vc_need_wrap || vc->vc_decim)
2303 FLUSH
2304 if (vc->vc_need_wrap) {
2305 cr(vc);
2306 lf(vc);
2307 }
2308 if (vc->vc_decim)
2309 insert_char(vc, 1);
2310 scr_writew(himask ?
2311 ((vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) :
2312 (vc_attr << 8) + tc,
2313 (u16 *) vc->vc_pos);
2314 if (DO_UPDATE(vc) && draw_x < 0) {
2315 draw_x = vc->vc_x;
2316 draw_from = vc->vc_pos;
2317 }
2318 if (vc->vc_x == vc->vc_cols - 1) {
2319 vc->vc_need_wrap = vc->vc_decawm;
2320 draw_to = vc->vc_pos + 2;
2321 } else {
2322 vc->vc_x++;
2323 draw_to = (vc->vc_pos += 2);
2324 }
2325
2326 if (!--width) break;
2327
2328 tc = conv_uni_to_pc(vc, ' '); /* A space is printed in the second column */
2329 if (tc < 0) tc = ' ';
2330 }
2331 notify_write(vc, c);
2332
2333 if (inverse) {
2334 FLUSH
2335 }
2336
2337 if (rescan) {
2338 rescan = 0;
2339 inverse = 0;
2340 width = 1;
2341 c = orig;
2342 goto rescan_last_byte;
2343 }
2344 continue;
2345 }
2346 FLUSH
2347 do_con_trol(tty, vc, orig);
2348 }
2349 FLUSH
2350 console_conditional_schedule();
2351 release_console_sem();
2352 notify_update(vc);
2353 return n;
2354 #undef FLUSH
2355 }
2356
2357 /*
2358 * This is the console switching callback.
2359 *
2360 * Doing console switching in a process context allows
2361 * us to do the switches asynchronously (needed when we want
2362 * to switch due to a keyboard interrupt). Synchronization
2363 * with other console code and prevention of re-entrancy is
2364 * ensured with console_sem.
2365 */
2366 static void console_callback(struct work_struct *ignored)
2367 {
2368 acquire_console_sem();
2369
2370 if (want_console >= 0) {
2371 if (want_console != fg_console &&
2372 vc_cons_allocated(want_console)) {
2373 hide_cursor(vc_cons[fg_console].d);
2374 change_console(vc_cons[want_console].d);
2375 /* we only changed when the console had already
2376 been allocated - a new console is not created
2377 in an interrupt routine */
2378 }
2379 want_console = -1;
2380 }
2381 if (do_poke_blanked_console) { /* do not unblank for a LED change */
2382 do_poke_blanked_console = 0;
2383 poke_blanked_console();
2384 }
2385 if (scrollback_delta) {
2386 struct vc_data *vc = vc_cons[fg_console].d;
2387 clear_selection();
2388 if (vc->vc_mode == KD_TEXT)
2389 vc->vc_sw->con_scrolldelta(vc, scrollback_delta);
2390 scrollback_delta = 0;
2391 }
2392 if (blank_timer_expired) {
2393 do_blank_screen(0);
2394 blank_timer_expired = 0;
2395 }
2396 notify_update(vc_cons[fg_console].d);
2397
2398 release_console_sem();
2399 }
2400
2401 int set_console(int nr)
2402 {
2403 struct vc_data *vc = vc_cons[fg_console].d;
2404
2405 if (!vc_cons_allocated(nr) || vt_dont_switch ||
2406 (vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) {
2407
2408 /*
2409 * Console switch will fail in console_callback() or
2410 * change_console() so there is no point scheduling
2411 * the callback
2412 *
2413 * Existing set_console() users don't check the return
2414 * value so this shouldn't break anything
2415 */
2416 return -EINVAL;
2417 }
2418
2419 want_console = nr;
2420 schedule_console_callback();
2421
2422 return 0;
2423 }
2424
2425 struct tty_driver *console_driver;
2426
2427 #ifdef CONFIG_VT_CONSOLE
2428
2429 /*
2430 * Console on virtual terminal
2431 *
2432 * The console must be locked when we get here.
2433 */
2434
2435 static void vt_console_print(struct console *co, const char *b, unsigned count)
2436 {
2437 struct vc_data *vc = vc_cons[fg_console].d;
2438 unsigned char c;
2439 static DEFINE_SPINLOCK(printing_lock);
2440 const ushort *start;
2441 ushort cnt = 0;
2442 ushort myx;
2443
2444 /* console busy or not yet initialized */
2445 if (!printable)
2446 return;
2447 if (!spin_trylock(&printing_lock))
2448 return;
2449
2450 if (kmsg_redirect && vc_cons_allocated(kmsg_redirect - 1))
2451 vc = vc_cons[kmsg_redirect - 1].d;
2452
2453 /* read `x' only after setting currcons properly (otherwise
2454 the `x' macro will read the x of the foreground console). */
2455 myx = vc->vc_x;
2456
2457 if (!vc_cons_allocated(fg_console)) {
2458 /* impossible */
2459 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2460 goto quit;
2461 }
2462
2463 if (vc->vc_mode != KD_TEXT)
2464 goto quit;
2465
2466 /* undraw cursor first */
2467 if (IS_FG(vc))
2468 hide_cursor(vc);
2469
2470 start = (ushort *)vc->vc_pos;
2471
2472 /* Contrived structure to try to emulate original need_wrap behaviour
2473 * Problems caused when we have need_wrap set on '\n' character */
2474 while (count--) {
2475 c = *b++;
2476 if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) {
2477 if (cnt > 0) {
2478 if (CON_IS_VISIBLE(vc))
2479 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2480 vc->vc_x += cnt;
2481 if (vc->vc_need_wrap)
2482 vc->vc_x--;
2483 cnt = 0;
2484 }
2485 if (c == 8) { /* backspace */
2486 bs(vc);
2487 start = (ushort *)vc->vc_pos;
2488 myx = vc->vc_x;
2489 continue;
2490 }
2491 if (c != 13)
2492 lf(vc);
2493 cr(vc);
2494 start = (ushort *)vc->vc_pos;
2495 myx = vc->vc_x;
2496 if (c == 10 || c == 13)
2497 continue;
2498 }
2499 scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos);
2500 notify_write(vc, c);
2501 cnt++;
2502 if (myx == vc->vc_cols - 1) {
2503 vc->vc_need_wrap = 1;
2504 continue;
2505 }
2506 vc->vc_pos += 2;
2507 myx++;
2508 }
2509 if (cnt > 0) {
2510 if (CON_IS_VISIBLE(vc))
2511 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2512 vc->vc_x += cnt;
2513 if (vc->vc_x == vc->vc_cols) {
2514 vc->vc_x--;
2515 vc->vc_need_wrap = 1;
2516 }
2517 }
2518 set_cursor(vc);
2519 notify_update(vc);
2520
2521 quit:
2522 spin_unlock(&printing_lock);
2523 }
2524
2525 static struct tty_driver *vt_console_device(struct console *c, int *index)
2526 {
2527 *index = c->index ? c->index-1 : fg_console;
2528 return console_driver;
2529 }
2530
2531 static struct console vt_console_driver = {
2532 .name = "tty",
2533 .write = vt_console_print,
2534 .device = vt_console_device,
2535 .unblank = unblank_screen,
2536 .flags = CON_PRINTBUFFER,
2537 .index = -1,
2538 };
2539 #endif
2540
2541 /*
2542 * Handling of Linux-specific VC ioctls
2543 */
2544
2545 /*
2546 * Generally a bit racy with respect to console_sem().
2547 *
2548 * There are some functions which don't need it.
2549 *
2550 * There are some functions which can sleep for arbitrary periods
2551 * (paste_selection) but we don't need the lock there anyway.
2552 *
2553 * set_selection has locking, and definitely needs it
2554 */
2555
2556 int tioclinux(struct tty_struct *tty, unsigned long arg)
2557 {
2558 char type, data;
2559 char __user *p = (char __user *)arg;
2560 int lines;
2561 int ret;
2562
2563 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN))
2564 return -EPERM;
2565 if (get_user(type, p))
2566 return -EFAULT;
2567 ret = 0;
2568
2569 lock_kernel();
2570
2571 switch (type)
2572 {
2573 case TIOCL_SETSEL:
2574 acquire_console_sem();
2575 ret = set_selection((struct tiocl_selection __user *)(p+1), tty);
2576 release_console_sem();
2577 break;
2578 case TIOCL_PASTESEL:
2579 ret = paste_selection(tty);
2580 break;
2581 case TIOCL_UNBLANKSCREEN:
2582 acquire_console_sem();
2583 unblank_screen();
2584 release_console_sem();
2585 break;
2586 case TIOCL_SELLOADLUT:
2587 ret = sel_loadlut(p);
2588 break;
2589 case TIOCL_GETSHIFTSTATE:
2590
2591 /*
2592 * Make it possible to react to Shift+Mousebutton.
2593 * Note that 'shift_state' is an undocumented
2594 * kernel-internal variable; programs not closely
2595 * related to the kernel should not use this.
2596 */
2597 data = shift_state;
2598 ret = __put_user(data, p);
2599 break;
2600 case TIOCL_GETMOUSEREPORTING:
2601 data = mouse_reporting();
2602 ret = __put_user(data, p);
2603 break;
2604 case TIOCL_SETVESABLANK:
2605 ret = set_vesa_blanking(p);
2606 break;
2607 case TIOCL_GETKMSGREDIRECT:
2608 data = kmsg_redirect;
2609 ret = __put_user(data, p);
2610 break;
2611 case TIOCL_SETKMSGREDIRECT:
2612 if (!capable(CAP_SYS_ADMIN)) {
2613 ret = -EPERM;
2614 } else {
2615 if (get_user(data, p+1))
2616 ret = -EFAULT;
2617 else
2618 kmsg_redirect = data;
2619 }
2620 break;
2621 case TIOCL_GETFGCONSOLE:
2622 ret = fg_console;
2623 break;
2624 case TIOCL_SCROLLCONSOLE:
2625 if (get_user(lines, (s32 __user *)(p+4))) {
2626 ret = -EFAULT;
2627 } else {
2628 scrollfront(vc_cons[fg_console].d, lines);
2629 ret = 0;
2630 }
2631 break;
2632 case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
2633 acquire_console_sem();
2634 ignore_poke = 1;
2635 do_blank_screen(0);
2636 release_console_sem();
2637 break;
2638 case TIOCL_BLANKEDSCREEN:
2639 ret = console_blanked;
2640 break;
2641 default:
2642 ret = -EINVAL;
2643 break;
2644 }
2645 unlock_kernel();
2646 return ret;
2647 }
2648
2649 /*
2650 * /dev/ttyN handling
2651 */
2652
2653 static int con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2654 {
2655 int retval;
2656
2657 retval = do_con_write(tty, buf, count);
2658 con_flush_chars(tty);
2659
2660 return retval;
2661 }
2662
2663 static int con_put_char(struct tty_struct *tty, unsigned char ch)
2664 {
2665 if (in_interrupt())
2666 return 0; /* n_r3964 calls put_char() from interrupt context */
2667 return do_con_write(tty, &ch, 1);
2668 }
2669
2670 static int con_write_room(struct tty_struct *tty)
2671 {
2672 if (tty->stopped)
2673 return 0;
2674 return 32768; /* No limit, really; we're not buffering */
2675 }
2676
2677 static int con_chars_in_buffer(struct tty_struct *tty)
2678 {
2679 return 0; /* we're not buffering */
2680 }
2681
2682 /*
2683 * con_throttle and con_unthrottle are only used for
2684 * paste_selection(), which has to stuff in a large number of
2685 * characters...
2686 */
2687 static void con_throttle(struct tty_struct *tty)
2688 {
2689 }
2690
2691 static void con_unthrottle(struct tty_struct *tty)
2692 {
2693 struct vc_data *vc = tty->driver_data;
2694
2695 wake_up_interruptible(&vc->paste_wait);
2696 }
2697
2698 /*
2699 * Turn the Scroll-Lock LED on when the tty is stopped
2700 */
2701 static void con_stop(struct tty_struct *tty)
2702 {
2703 int console_num;
2704 if (!tty)
2705 return;
2706 console_num = tty->index;
2707 if (!vc_cons_allocated(console_num))
2708 return;
2709 set_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2710 set_leds();
2711 }
2712
2713 /*
2714 * Turn the Scroll-Lock LED off when the console is started
2715 */
2716 static void con_start(struct tty_struct *tty)
2717 {
2718 int console_num;
2719 if (!tty)
2720 return;
2721 console_num = tty->index;
2722 if (!vc_cons_allocated(console_num))
2723 return;
2724 clr_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2725 set_leds();
2726 }
2727
2728 static void con_flush_chars(struct tty_struct *tty)
2729 {
2730 struct vc_data *vc;
2731
2732 if (in_interrupt()) /* from flush_to_ldisc */
2733 return;
2734
2735 /* if we race with con_close(), vt may be null */
2736 acquire_console_sem();
2737 vc = tty->driver_data;
2738 if (vc)
2739 set_cursor(vc);
2740 release_console_sem();
2741 }
2742
2743 /*
2744 * Allocate the console screen memory.
2745 */
2746 static int con_open(struct tty_struct *tty, struct file *filp)
2747 {
2748 unsigned int currcons = tty->index;
2749 int ret = 0;
2750
2751 acquire_console_sem();
2752 if (tty->driver_data == NULL) {
2753 ret = vc_allocate(currcons);
2754 if (ret == 0) {
2755 struct vc_data *vc = vc_cons[currcons].d;
2756
2757 /* Still being freed */
2758 if (vc->vc_tty) {
2759 release_console_sem();
2760 return -ERESTARTSYS;
2761 }
2762 tty->driver_data = vc;
2763 vc->vc_tty = tty;
2764
2765 if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
2766 tty->winsize.ws_row = vc_cons[currcons].d->vc_rows;
2767 tty->winsize.ws_col = vc_cons[currcons].d->vc_cols;
2768 }
2769 if (vc->vc_utf)
2770 tty->termios->c_iflag |= IUTF8;
2771 else
2772 tty->termios->c_iflag &= ~IUTF8;
2773 release_console_sem();
2774 return ret;
2775 }
2776 }
2777 release_console_sem();
2778 return ret;
2779 }
2780
2781 static void con_close(struct tty_struct *tty, struct file *filp)
2782 {
2783 /* Nothing to do - we defer to shutdown */
2784 }
2785
2786 static void con_shutdown(struct tty_struct *tty)
2787 {
2788 struct vc_data *vc = tty->driver_data;
2789 BUG_ON(vc == NULL);
2790 acquire_console_sem();
2791 vc->vc_tty = NULL;
2792 release_console_sem();
2793 tty_shutdown(tty);
2794 }
2795
2796 static int default_italic_color = 2; // green (ASCII)
2797 static int default_underline_color = 3; // cyan (ASCII)
2798 module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR);
2799 module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR);
2800
2801 static void vc_init(struct vc_data *vc, unsigned int rows,
2802 unsigned int cols, int do_clear)
2803 {
2804 int j, k ;
2805
2806 vc->vc_cols = cols;
2807 vc->vc_rows = rows;
2808 vc->vc_size_row = cols << 1;
2809 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
2810
2811 set_origin(vc);
2812 vc->vc_pos = vc->vc_origin;
2813 reset_vc(vc);
2814 for (j=k=0; j<16; j++) {
2815 vc->vc_palette[k++] = default_red[j] ;
2816 vc->vc_palette[k++] = default_grn[j] ;
2817 vc->vc_palette[k++] = default_blu[j] ;
2818 }
2819 vc->vc_def_color = 0x07; /* white */
2820 vc->vc_ulcolor = default_underline_color;
2821 vc->vc_itcolor = default_italic_color;
2822 vc->vc_halfcolor = 0x08; /* grey */
2823 init_waitqueue_head(&vc->paste_wait);
2824 reset_terminal(vc, do_clear);
2825 }
2826
2827 /*
2828 * This routine initializes console interrupts, and does nothing
2829 * else. If you want the screen to clear, call tty_write with
2830 * the appropriate escape-sequence.
2831 */
2832
2833 static int __init con_init(void)
2834 {
2835 const char *display_desc = NULL;
2836 struct vc_data *vc;
2837 unsigned int currcons = 0, i;
2838
2839 acquire_console_sem();
2840
2841 if (conswitchp)
2842 display_desc = conswitchp->con_startup();
2843 if (!display_desc) {
2844 fg_console = 0;
2845 release_console_sem();
2846 return 0;
2847 }
2848
2849 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2850 struct con_driver *con_driver = &registered_con_driver[i];
2851
2852 if (con_driver->con == NULL) {
2853 con_driver->con = conswitchp;
2854 con_driver->desc = display_desc;
2855 con_driver->flag = CON_DRIVER_FLAG_INIT;
2856 con_driver->first = 0;
2857 con_driver->last = MAX_NR_CONSOLES - 1;
2858 break;
2859 }
2860 }
2861
2862 for (i = 0; i < MAX_NR_CONSOLES; i++)
2863 con_driver_map[i] = conswitchp;
2864
2865 if (blankinterval) {
2866 blank_state = blank_normal_wait;
2867 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
2868 }
2869
2870 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) {
2871 vc_cons[currcons].d = vc = kzalloc(sizeof(struct vc_data), GFP_NOWAIT);
2872 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
2873 visual_init(vc, currcons, 1);
2874 vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_NOWAIT);
2875 vc_init(vc, vc->vc_rows, vc->vc_cols,
2876 currcons || !vc->vc_sw->con_save_screen);
2877 }
2878 currcons = fg_console = 0;
2879 master_display_fg = vc = vc_cons[currcons].d;
2880 set_origin(vc);
2881 save_screen(vc);
2882 gotoxy(vc, vc->vc_x, vc->vc_y);
2883 csi_J(vc, 0);
2884 update_screen(vc);
2885 printk("Console: %s %s %dx%d",
2886 vc->vc_can_do_color ? "colour" : "mono",
2887 display_desc, vc->vc_cols, vc->vc_rows);
2888 printable = 1;
2889 printk("\n");
2890
2891 release_console_sem();
2892
2893 #ifdef CONFIG_VT_CONSOLE
2894 register_console(&vt_console_driver);
2895 #endif
2896 return 0;
2897 }
2898 console_initcall(con_init);
2899
2900 static const struct tty_operations con_ops = {
2901 .open = con_open,
2902 .close = con_close,
2903 .write = con_write,
2904 .write_room = con_write_room,
2905 .put_char = con_put_char,
2906 .flush_chars = con_flush_chars,
2907 .chars_in_buffer = con_chars_in_buffer,
2908 .ioctl = vt_ioctl,
2909 #ifdef CONFIG_COMPAT
2910 .compat_ioctl = vt_compat_ioctl,
2911 #endif
2912 .stop = con_stop,
2913 .start = con_start,
2914 .throttle = con_throttle,
2915 .unthrottle = con_unthrottle,
2916 .resize = vt_resize,
2917 .shutdown = con_shutdown
2918 };
2919
2920 static struct cdev vc0_cdev;
2921
2922 int __init vty_init(const struct file_operations *console_fops)
2923 {
2924 cdev_init(&vc0_cdev, console_fops);
2925 if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) ||
2926 register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0)
2927 panic("Couldn't register /dev/tty0 driver\n");
2928 device_create(tty_class, NULL, MKDEV(TTY_MAJOR, 0), NULL, "tty0");
2929
2930 vcs_init();
2931
2932 console_driver = alloc_tty_driver(MAX_NR_CONSOLES);
2933 if (!console_driver)
2934 panic("Couldn't allocate console driver\n");
2935 console_driver->owner = THIS_MODULE;
2936 console_driver->name = "tty";
2937 console_driver->name_base = 1;
2938 console_driver->major = TTY_MAJOR;
2939 console_driver->minor_start = 1;
2940 console_driver->type = TTY_DRIVER_TYPE_CONSOLE;
2941 console_driver->init_termios = tty_std_termios;
2942 if (default_utf8)
2943 console_driver->init_termios.c_iflag |= IUTF8;
2944 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS;
2945 tty_set_operations(console_driver, &con_ops);
2946 if (tty_register_driver(console_driver))
2947 panic("Couldn't register console driver\n");
2948 kbd_init();
2949 console_map_init();
2950 #ifdef CONFIG_MDA_CONSOLE
2951 mda_console_init();
2952 #endif
2953 return 0;
2954 }
2955
2956 #ifndef VT_SINGLE_DRIVER
2957
2958 static struct class *vtconsole_class;
2959
2960 static int bind_con_driver(const struct consw *csw, int first, int last,
2961 int deflt)
2962 {
2963 struct module *owner = csw->owner;
2964 const char *desc = NULL;
2965 struct con_driver *con_driver;
2966 int i, j = -1, k = -1, retval = -ENODEV;
2967
2968 if (!try_module_get(owner))
2969 return -ENODEV;
2970
2971 acquire_console_sem();
2972
2973 /* check if driver is registered */
2974 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2975 con_driver = &registered_con_driver[i];
2976
2977 if (con_driver->con == csw) {
2978 desc = con_driver->desc;
2979 retval = 0;
2980 break;
2981 }
2982 }
2983
2984 if (retval)
2985 goto err;
2986
2987 if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) {
2988 csw->con_startup();
2989 con_driver->flag |= CON_DRIVER_FLAG_INIT;
2990 }
2991
2992 if (deflt) {
2993 if (conswitchp)
2994 module_put(conswitchp->owner);
2995
2996 __module_get(owner);
2997 conswitchp = csw;
2998 }
2999
3000 first = max(first, con_driver->first);
3001 last = min(last, con_driver->last);
3002
3003 for (i = first; i <= last; i++) {
3004 int old_was_color;
3005 struct vc_data *vc = vc_cons[i].d;
3006
3007 if (con_driver_map[i])
3008 module_put(con_driver_map[i]->owner);
3009 __module_get(owner);
3010 con_driver_map[i] = csw;
3011
3012 if (!vc || !vc->vc_sw)
3013 continue;
3014
3015 j = i;
3016
3017 if (CON_IS_VISIBLE(vc)) {
3018 k = i;
3019 save_screen(vc);
3020 }
3021
3022 old_was_color = vc->vc_can_do_color;
3023 vc->vc_sw->con_deinit(vc);
3024 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
3025 visual_init(vc, i, 0);
3026 set_origin(vc);
3027 update_attr(vc);
3028
3029 /* If the console changed between mono <-> color, then
3030 * the attributes in the screenbuf will be wrong. The
3031 * following resets all attributes to something sane.
3032 */
3033 if (old_was_color != vc->vc_can_do_color)
3034 clear_buffer_attributes(vc);
3035 }
3036
3037 printk("Console: switching ");
3038 if (!deflt)
3039 printk("consoles %d-%d ", first+1, last+1);
3040 if (j >= 0) {
3041 struct vc_data *vc = vc_cons[j].d;
3042
3043 printk("to %s %s %dx%d\n",
3044 vc->vc_can_do_color ? "colour" : "mono",
3045 desc, vc->vc_cols, vc->vc_rows);
3046
3047 if (k >= 0) {
3048 vc = vc_cons[k].d;
3049 update_screen(vc);
3050 }
3051 } else
3052 printk("to %s\n", desc);
3053
3054 retval = 0;
3055 err:
3056 release_console_sem();
3057 module_put(owner);
3058 return retval;
3059 };
3060
3061 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
3062 static int con_is_graphics(const struct consw *csw, int first, int last)
3063 {
3064 int i, retval = 0;
3065
3066 for (i = first; i <= last; i++) {
3067 struct vc_data *vc = vc_cons[i].d;
3068
3069 if (vc && vc->vc_mode == KD_GRAPHICS) {
3070 retval = 1;
3071 break;
3072 }
3073 }
3074
3075 return retval;
3076 }
3077
3078 /**
3079 * unbind_con_driver - unbind a console driver
3080 * @csw: pointer to console driver to unregister
3081 * @first: first in range of consoles that @csw should be unbound from
3082 * @last: last in range of consoles that @csw should be unbound from
3083 * @deflt: should next bound console driver be default after @csw is unbound?
3084 *
3085 * To unbind a driver from all possible consoles, pass 0 as @first and
3086 * %MAX_NR_CONSOLES as @last.
3087 *
3088 * @deflt controls whether the console that ends up replacing @csw should be
3089 * the default console.
3090 *
3091 * RETURNS:
3092 * -ENODEV if @csw isn't a registered console driver or can't be unregistered
3093 * or 0 on success.
3094 */
3095 int unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
3096 {
3097 struct module *owner = csw->owner;
3098 const struct consw *defcsw = NULL;
3099 struct con_driver *con_driver = NULL, *con_back = NULL;
3100 int i, retval = -ENODEV;
3101
3102 if (!try_module_get(owner))
3103 return -ENODEV;
3104
3105 acquire_console_sem();
3106
3107 /* check if driver is registered and if it is unbindable */
3108 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3109 con_driver = &registered_con_driver[i];
3110
3111 if (con_driver->con == csw &&
3112 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3113 retval = 0;
3114 break;
3115 }
3116 }
3117
3118 if (retval) {
3119 release_console_sem();
3120 goto err;
3121 }
3122
3123 retval = -ENODEV;
3124
3125 /* check if backup driver exists */
3126 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3127 con_back = &registered_con_driver[i];
3128
3129 if (con_back->con &&
3130 !(con_back->flag & CON_DRIVER_FLAG_MODULE)) {
3131 defcsw = con_back->con;
3132 retval = 0;
3133 break;
3134 }
3135 }
3136
3137 if (retval) {
3138 release_console_sem();
3139 goto err;
3140 }
3141
3142 if (!con_is_bound(csw)) {
3143 release_console_sem();
3144 goto err;
3145 }
3146
3147 first = max(first, con_driver->first);
3148 last = min(last, con_driver->last);
3149
3150 for (i = first; i <= last; i++) {
3151 if (con_driver_map[i] == csw) {
3152 module_put(csw->owner);
3153 con_driver_map[i] = NULL;
3154 }
3155 }
3156
3157 if (!con_is_bound(defcsw)) {
3158 const struct consw *defconsw = conswitchp;
3159
3160 defcsw->con_startup();
3161 con_back->flag |= CON_DRIVER_FLAG_INIT;
3162 /*
3163 * vgacon may change the default driver to point
3164 * to dummycon, we restore it here...
3165 */
3166 conswitchp = defconsw;
3167 }
3168
3169 if (!con_is_bound(csw))
3170 con_driver->flag &= ~CON_DRIVER_FLAG_INIT;
3171
3172 release_console_sem();
3173 /* ignore return value, binding should not fail */
3174 bind_con_driver(defcsw, first, last, deflt);
3175 err:
3176 module_put(owner);
3177 return retval;
3178
3179 }
3180 EXPORT_SYMBOL(unbind_con_driver);
3181
3182 static int vt_bind(struct con_driver *con)
3183 {
3184 const struct consw *defcsw = NULL, *csw = NULL;
3185 int i, more = 1, first = -1, last = -1, deflt = 0;
3186
3187 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3188 con_is_graphics(con->con, con->first, con->last))
3189 goto err;
3190
3191 csw = con->con;
3192
3193 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3194 struct con_driver *con = &registered_con_driver[i];
3195
3196 if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) {
3197 defcsw = con->con;
3198 break;
3199 }
3200 }
3201
3202 if (!defcsw)
3203 goto err;
3204
3205 while (more) {
3206 more = 0;
3207
3208 for (i = con->first; i <= con->last; i++) {
3209 if (con_driver_map[i] == defcsw) {
3210 if (first == -1)
3211 first = i;
3212 last = i;
3213 more = 1;
3214 } else if (first != -1)
3215 break;
3216 }
3217
3218 if (first == 0 && last == MAX_NR_CONSOLES -1)
3219 deflt = 1;
3220
3221 if (first != -1)
3222 bind_con_driver(csw, first, last, deflt);
3223
3224 first = -1;
3225 last = -1;
3226 deflt = 0;
3227 }
3228
3229 err:
3230 return 0;
3231 }
3232
3233 static int vt_unbind(struct con_driver *con)
3234 {
3235 const struct consw *csw = NULL;
3236 int i, more = 1, first = -1, last = -1, deflt = 0;
3237
3238 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3239 con_is_graphics(con->con, con->first, con->last))
3240 goto err;
3241
3242 csw = con->con;
3243
3244 while (more) {
3245 more = 0;
3246
3247 for (i = con->first; i <= con->last; i++) {
3248 if (con_driver_map[i] == csw) {
3249 if (first == -1)
3250 first = i;
3251 last = i;
3252 more = 1;
3253 } else if (first != -1)
3254 break;
3255 }
3256
3257 if (first == 0 && last == MAX_NR_CONSOLES -1)
3258 deflt = 1;
3259
3260 if (first != -1)
3261 unbind_con_driver(csw, first, last, deflt);
3262
3263 first = -1;
3264 last = -1;
3265 deflt = 0;
3266 }
3267
3268 err:
3269 return 0;
3270 }
3271 #else
3272 static inline int vt_bind(struct con_driver *con)
3273 {
3274 return 0;
3275 }
3276 static inline int vt_unbind(struct con_driver *con)
3277 {
3278 return 0;
3279 }
3280 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3281
3282 static ssize_t store_bind(struct device *dev, struct device_attribute *attr,
3283 const char *buf, size_t count)
3284 {
3285 struct con_driver *con = dev_get_drvdata(dev);
3286 int bind = simple_strtoul(buf, NULL, 0);
3287
3288 if (bind)
3289 vt_bind(con);
3290 else
3291 vt_unbind(con);
3292
3293 return count;
3294 }
3295
3296 static ssize_t show_bind(struct device *dev, struct device_attribute *attr,
3297 char *buf)
3298 {
3299 struct con_driver *con = dev_get_drvdata(dev);
3300 int bind = con_is_bound(con->con);
3301
3302 return snprintf(buf, PAGE_SIZE, "%i\n", bind);
3303 }
3304
3305 static ssize_t show_name(struct device *dev, struct device_attribute *attr,
3306 char *buf)
3307 {
3308 struct con_driver *con = dev_get_drvdata(dev);
3309
3310 return snprintf(buf, PAGE_SIZE, "%s %s\n",
3311 (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)",
3312 con->desc);
3313
3314 }
3315
3316 static struct device_attribute device_attrs[] = {
3317 __ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind),
3318 __ATTR(name, S_IRUGO, show_name, NULL),
3319 };
3320
3321 static int vtconsole_init_device(struct con_driver *con)
3322 {
3323 int i;
3324 int error = 0;
3325
3326 con->flag |= CON_DRIVER_FLAG_ATTR;
3327 dev_set_drvdata(con->dev, con);
3328 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3329 error = device_create_file(con->dev, &device_attrs[i]);
3330 if (error)
3331 break;
3332 }
3333
3334 if (error) {
3335 while (--i >= 0)
3336 device_remove_file(con->dev, &device_attrs[i]);
3337 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3338 }
3339
3340 return error;
3341 }
3342
3343 static void vtconsole_deinit_device(struct con_driver *con)
3344 {
3345 int i;
3346
3347 if (con->flag & CON_DRIVER_FLAG_ATTR) {
3348 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3349 device_remove_file(con->dev, &device_attrs[i]);
3350 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3351 }
3352 }
3353
3354 /**
3355 * con_is_bound - checks if driver is bound to the console
3356 * @csw: console driver
3357 *
3358 * RETURNS: zero if unbound, nonzero if bound
3359 *
3360 * Drivers can call this and if zero, they should release
3361 * all resources allocated on con_startup()
3362 */
3363 int con_is_bound(const struct consw *csw)
3364 {
3365 int i, bound = 0;
3366
3367 for (i = 0; i < MAX_NR_CONSOLES; i++) {
3368 if (con_driver_map[i] == csw) {
3369 bound = 1;
3370 break;
3371 }
3372 }
3373
3374 return bound;
3375 }
3376 EXPORT_SYMBOL(con_is_bound);
3377
3378 /**
3379 * register_con_driver - register console driver to console layer
3380 * @csw: console driver
3381 * @first: the first console to take over, minimum value is 0
3382 * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1
3383 *
3384 * DESCRIPTION: This function registers a console driver which can later
3385 * bind to a range of consoles specified by @first and @last. It will
3386 * also initialize the console driver by calling con_startup().
3387 */
3388 int register_con_driver(const struct consw *csw, int first, int last)
3389 {
3390 struct module *owner = csw->owner;
3391 struct con_driver *con_driver;
3392 const char *desc;
3393 int i, retval = 0;
3394
3395 if (!try_module_get(owner))
3396 return -ENODEV;
3397
3398 acquire_console_sem();
3399
3400 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3401 con_driver = &registered_con_driver[i];
3402
3403 /* already registered */
3404 if (con_driver->con == csw)
3405 retval = -EINVAL;
3406 }
3407
3408 if (retval)
3409 goto err;
3410
3411 desc = csw->con_startup();
3412
3413 if (!desc)
3414 goto err;
3415
3416 retval = -EINVAL;
3417
3418 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3419 con_driver = &registered_con_driver[i];
3420
3421 if (con_driver->con == NULL) {
3422 con_driver->con = csw;
3423 con_driver->desc = desc;
3424 con_driver->node = i;
3425 con_driver->flag = CON_DRIVER_FLAG_MODULE |
3426 CON_DRIVER_FLAG_INIT;
3427 con_driver->first = first;
3428 con_driver->last = last;
3429 retval = 0;
3430 break;
3431 }
3432 }
3433
3434 if (retval)
3435 goto err;
3436
3437 con_driver->dev = device_create(vtconsole_class, NULL,
3438 MKDEV(0, con_driver->node),
3439 NULL, "vtcon%i",
3440 con_driver->node);
3441
3442 if (IS_ERR(con_driver->dev)) {
3443 printk(KERN_WARNING "Unable to create device for %s; "
3444 "errno = %ld\n", con_driver->desc,
3445 PTR_ERR(con_driver->dev));
3446 con_driver->dev = NULL;
3447 } else {
3448 vtconsole_init_device(con_driver);
3449 }
3450
3451 err:
3452 release_console_sem();
3453 module_put(owner);
3454 return retval;
3455 }
3456 EXPORT_SYMBOL(register_con_driver);
3457
3458 /**
3459 * unregister_con_driver - unregister console driver from console layer
3460 * @csw: console driver
3461 *
3462 * DESCRIPTION: All drivers that registers to the console layer must
3463 * call this function upon exit, or if the console driver is in a state
3464 * where it won't be able to handle console services, such as the
3465 * framebuffer console without loaded framebuffer drivers.
3466 *
3467 * The driver must unbind first prior to unregistration.
3468 */
3469 int unregister_con_driver(const struct consw *csw)
3470 {
3471 int i, retval = -ENODEV;
3472
3473 acquire_console_sem();
3474
3475 /* cannot unregister a bound driver */
3476 if (con_is_bound(csw))
3477 goto err;
3478
3479 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3480 struct con_driver *con_driver = &registered_con_driver[i];
3481
3482 if (con_driver->con == csw &&
3483 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3484 vtconsole_deinit_device(con_driver);
3485 device_destroy(vtconsole_class,
3486 MKDEV(0, con_driver->node));
3487 con_driver->con = NULL;
3488 con_driver->desc = NULL;
3489 con_driver->dev = NULL;
3490 con_driver->node = 0;
3491 con_driver->flag = 0;
3492 con_driver->first = 0;
3493 con_driver->last = 0;
3494 retval = 0;
3495 break;
3496 }
3497 }
3498 err:
3499 release_console_sem();
3500 return retval;
3501 }
3502 EXPORT_SYMBOL(unregister_con_driver);
3503
3504 /*
3505 * If we support more console drivers, this function is used
3506 * when a driver wants to take over some existing consoles
3507 * and become default driver for newly opened ones.
3508 *
3509 * take_over_console is basically a register followed by unbind
3510 */
3511 int take_over_console(const struct consw *csw, int first, int last, int deflt)
3512 {
3513 int err;
3514
3515 err = register_con_driver(csw, first, last);
3516
3517 if (!err)
3518 bind_con_driver(csw, first, last, deflt);
3519
3520 return err;
3521 }
3522
3523 /*
3524 * give_up_console is a wrapper to unregister_con_driver. It will only
3525 * work if driver is fully unbound.
3526 */
3527 void give_up_console(const struct consw *csw)
3528 {
3529 unregister_con_driver(csw);
3530 }
3531
3532 static int __init vtconsole_class_init(void)
3533 {
3534 int i;
3535
3536 vtconsole_class = class_create(THIS_MODULE, "vtconsole");
3537 if (IS_ERR(vtconsole_class)) {
3538 printk(KERN_WARNING "Unable to create vt console class; "
3539 "errno = %ld\n", PTR_ERR(vtconsole_class));
3540 vtconsole_class = NULL;
3541 }
3542
3543 /* Add system drivers to sysfs */
3544 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3545 struct con_driver *con = &registered_con_driver[i];
3546
3547 if (con->con && !con->dev) {
3548 con->dev = device_create(vtconsole_class, NULL,
3549 MKDEV(0, con->node),
3550 NULL, "vtcon%i",
3551 con->node);
3552
3553 if (IS_ERR(con->dev)) {
3554 printk(KERN_WARNING "Unable to create "
3555 "device for %s; errno = %ld\n",
3556 con->desc, PTR_ERR(con->dev));
3557 con->dev = NULL;
3558 } else {
3559 vtconsole_init_device(con);
3560 }
3561 }
3562 }
3563
3564 return 0;
3565 }
3566 postcore_initcall(vtconsole_class_init);
3567
3568 #endif
3569
3570 /*
3571 * Screen blanking
3572 */
3573
3574 static int set_vesa_blanking(char __user *p)
3575 {
3576 unsigned int mode;
3577
3578 if (get_user(mode, p + 1))
3579 return -EFAULT;
3580
3581 vesa_blank_mode = (mode < 4) ? mode : 0;
3582 return 0;
3583 }
3584
3585 void do_blank_screen(int entering_gfx)
3586 {
3587 struct vc_data *vc = vc_cons[fg_console].d;
3588 int i;
3589
3590 WARN_CONSOLE_UNLOCKED();
3591
3592 if (console_blanked) {
3593 if (blank_state == blank_vesa_wait) {
3594 blank_state = blank_off;
3595 vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0);
3596 }
3597 return;
3598 }
3599
3600 /* entering graphics mode? */
3601 if (entering_gfx) {
3602 hide_cursor(vc);
3603 save_screen(vc);
3604 vc->vc_sw->con_blank(vc, -1, 1);
3605 console_blanked = fg_console + 1;
3606 blank_state = blank_off;
3607 set_origin(vc);
3608 return;
3609 }
3610
3611 if (blank_state != blank_normal_wait)
3612 return;
3613 blank_state = blank_off;
3614
3615 /* don't blank graphics */
3616 if (vc->vc_mode != KD_TEXT) {
3617 console_blanked = fg_console + 1;
3618 return;
3619 }
3620
3621 hide_cursor(vc);
3622 del_timer_sync(&console_timer);
3623 blank_timer_expired = 0;
3624
3625 save_screen(vc);
3626 /* In case we need to reset origin, blanking hook returns 1 */
3627 i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0);
3628 console_blanked = fg_console + 1;
3629 if (i)
3630 set_origin(vc);
3631
3632 if (console_blank_hook && console_blank_hook(1))
3633 return;
3634
3635 if (vesa_off_interval && vesa_blank_mode) {
3636 blank_state = blank_vesa_wait;
3637 mod_timer(&console_timer, jiffies + vesa_off_interval);
3638 }
3639 vt_event_post(VT_EVENT_BLANK, vc->vc_num, vc->vc_num);
3640 }
3641 EXPORT_SYMBOL(do_blank_screen);
3642
3643 /*
3644 * Called by timer as well as from vt_console_driver
3645 */
3646 void do_unblank_screen(int leaving_gfx)
3647 {
3648 struct vc_data *vc;
3649
3650 /* This should now always be called from a "sane" (read: can schedule)
3651 * context for the sake of the low level drivers, except in the special
3652 * case of oops_in_progress
3653 */
3654 if (!oops_in_progress)
3655 might_sleep();
3656
3657 WARN_CONSOLE_UNLOCKED();
3658
3659 ignore_poke = 0;
3660 if (!console_blanked)
3661 return;
3662 if (!vc_cons_allocated(fg_console)) {
3663 /* impossible */
3664 printk("unblank_screen: tty %d not allocated ??\n", fg_console+1);
3665 return;
3666 }
3667 vc = vc_cons[fg_console].d;
3668 if (vc->vc_mode != KD_TEXT)
3669 return; /* but leave console_blanked != 0 */
3670
3671 if (blankinterval) {
3672 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
3673 blank_state = blank_normal_wait;
3674 }
3675
3676 console_blanked = 0;
3677 if (vc->vc_sw->con_blank(vc, 0, leaving_gfx))
3678 /* Low-level driver cannot restore -> do it ourselves */
3679 update_screen(vc);
3680 if (console_blank_hook)
3681 console_blank_hook(0);
3682 set_palette(vc);
3683 set_cursor(vc);
3684 vt_event_post(VT_EVENT_UNBLANK, vc->vc_num, vc->vc_num);
3685 }
3686 EXPORT_SYMBOL(do_unblank_screen);
3687
3688 /*
3689 * This is called by the outside world to cause a forced unblank, mostly for
3690 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
3691 * call it with 1 as an argument and so force a mode restore... that may kill
3692 * X or at least garbage the screen but would also make the Oops visible...
3693 */
3694 void unblank_screen(void)
3695 {
3696 do_unblank_screen(0);
3697 }
3698
3699 /*
3700 * We defer the timer blanking to work queue so it can take the console mutex
3701 * (console operations can still happen at irq time, but only from printk which
3702 * has the console mutex. Not perfect yet, but better than no locking
3703 */
3704 static void blank_screen_t(unsigned long dummy)
3705 {
3706 if (unlikely(!keventd_up())) {
3707 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
3708 return;
3709 }
3710 blank_timer_expired = 1;
3711 schedule_work(&console_work);
3712 }
3713
3714 void poke_blanked_console(void)
3715 {
3716 WARN_CONSOLE_UNLOCKED();
3717
3718 /* Add this so we quickly catch whoever might call us in a non
3719 * safe context. Nowadays, unblank_screen() isn't to be called in
3720 * atomic contexts and is allowed to schedule (with the special case
3721 * of oops_in_progress, but that isn't of any concern for this
3722 * function. --BenH.
3723 */
3724 might_sleep();
3725
3726 /* This isn't perfectly race free, but a race here would be mostly harmless,
3727 * at worse, we'll do a spurrious blank and it's unlikely
3728 */
3729 del_timer(&console_timer);
3730 blank_timer_expired = 0;
3731
3732 if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS)
3733 return;
3734 if (console_blanked)
3735 unblank_screen();
3736 else if (blankinterval) {
3737 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
3738 blank_state = blank_normal_wait;
3739 }
3740 }
3741
3742 /*
3743 * Palettes
3744 */
3745
3746 static void set_palette(struct vc_data *vc)
3747 {
3748 WARN_CONSOLE_UNLOCKED();
3749
3750 if (vc->vc_mode != KD_GRAPHICS)
3751 vc->vc_sw->con_set_palette(vc, color_table);
3752 }
3753
3754 static int set_get_cmap(unsigned char __user *arg, int set)
3755 {
3756 int i, j, k;
3757
3758 WARN_CONSOLE_UNLOCKED();
3759
3760 for (i = 0; i < 16; i++)
3761 if (set) {
3762 get_user(default_red[i], arg++);
3763 get_user(default_grn[i], arg++);
3764 get_user(default_blu[i], arg++);
3765 } else {
3766 put_user(default_red[i], arg++);
3767 put_user(default_grn[i], arg++);
3768 put_user(default_blu[i], arg++);
3769 }
3770 if (set) {
3771 for (i = 0; i < MAX_NR_CONSOLES; i++)
3772 if (vc_cons_allocated(i)) {
3773 for (j = k = 0; j < 16; j++) {
3774 vc_cons[i].d->vc_palette[k++] = default_red[j];
3775 vc_cons[i].d->vc_palette[k++] = default_grn[j];
3776 vc_cons[i].d->vc_palette[k++] = default_blu[j];
3777 }
3778 set_palette(vc_cons[i].d);
3779 }
3780 }
3781 return 0;
3782 }
3783
3784 /*
3785 * Load palette into the DAC registers. arg points to a colour
3786 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
3787 */
3788
3789 int con_set_cmap(unsigned char __user *arg)
3790 {
3791 int rc;
3792
3793 acquire_console_sem();
3794 rc = set_get_cmap (arg,1);
3795 release_console_sem();
3796
3797 return rc;
3798 }
3799
3800 int con_get_cmap(unsigned char __user *arg)
3801 {
3802 int rc;
3803
3804 acquire_console_sem();
3805 rc = set_get_cmap (arg,0);
3806 release_console_sem();
3807
3808 return rc;
3809 }
3810
3811 void reset_palette(struct vc_data *vc)
3812 {
3813 int j, k;
3814 for (j=k=0; j<16; j++) {
3815 vc->vc_palette[k++] = default_red[j];
3816 vc->vc_palette[k++] = default_grn[j];
3817 vc->vc_palette[k++] = default_blu[j];
3818 }
3819 set_palette(vc);
3820 }
3821
3822 /*
3823 * Font switching
3824 *
3825 * Currently we only support fonts up to 32 pixels wide, at a maximum height
3826 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
3827 * depending on width) reserved for each character which is kinda wasty, but
3828 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
3829 * is upto the actual low-level console-driver convert data into its favorite
3830 * format (maybe we should add a `fontoffset' field to the `display'
3831 * structure so we won't have to convert the fontdata all the time.
3832 * /Jes
3833 */
3834
3835 #define max_font_size 65536
3836
3837 static int con_font_get(struct vc_data *vc, struct console_font_op *op)
3838 {
3839 struct console_font font;
3840 int rc = -EINVAL;
3841 int c;
3842
3843 if (vc->vc_mode != KD_TEXT)
3844 return -EINVAL;
3845
3846 if (op->data) {
3847 font.data = kmalloc(max_font_size, GFP_KERNEL);
3848 if (!font.data)
3849 return -ENOMEM;
3850 } else
3851 font.data = NULL;
3852
3853 acquire_console_sem();
3854 if (vc->vc_sw->con_font_get)
3855 rc = vc->vc_sw->con_font_get(vc, &font);
3856 else
3857 rc = -ENOSYS;
3858 release_console_sem();
3859
3860 if (rc)
3861 goto out;
3862
3863 c = (font.width+7)/8 * 32 * font.charcount;
3864
3865 if (op->data && font.charcount > op->charcount)
3866 rc = -ENOSPC;
3867 if (!(op->flags & KD_FONT_FLAG_OLD)) {
3868 if (font.width > op->width || font.height > op->height)
3869 rc = -ENOSPC;
3870 } else {
3871 if (font.width != 8)
3872 rc = -EIO;
3873 else if ((op->height && font.height > op->height) ||
3874 font.height > 32)
3875 rc = -ENOSPC;
3876 }
3877 if (rc)
3878 goto out;
3879
3880 op->height = font.height;
3881 op->width = font.width;
3882 op->charcount = font.charcount;
3883
3884 if (op->data && copy_to_user(op->data, font.data, c))
3885 rc = -EFAULT;
3886
3887 out:
3888 kfree(font.data);
3889 return rc;
3890 }
3891
3892 static int con_font_set(struct vc_data *vc, struct console_font_op *op)
3893 {
3894 struct console_font font;
3895 int rc = -EINVAL;
3896 int size;
3897
3898 if (vc->vc_mode != KD_TEXT)
3899 return -EINVAL;
3900 if (!op->data)
3901 return -EINVAL;
3902 if (op->charcount > 512)
3903 return -EINVAL;
3904 if (!op->height) { /* Need to guess font height [compat] */
3905 int h, i;
3906 u8 __user *charmap = op->data;
3907 u8 tmp;
3908
3909 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
3910 so that we can get rid of this soon */
3911 if (!(op->flags & KD_FONT_FLAG_OLD))
3912 return -EINVAL;
3913 for (h = 32; h > 0; h--)
3914 for (i = 0; i < op->charcount; i++) {
3915 if (get_user(tmp, &charmap[32*i+h-1]))
3916 return -EFAULT;
3917 if (tmp)
3918 goto nonzero;
3919 }
3920 return -EINVAL;
3921 nonzero:
3922 op->height = h;
3923 }
3924 if (op->width <= 0 || op->width > 32 || op->height > 32)
3925 return -EINVAL;
3926 size = (op->width+7)/8 * 32 * op->charcount;
3927 if (size > max_font_size)
3928 return -ENOSPC;
3929 font.charcount = op->charcount;
3930 font.height = op->height;
3931 font.width = op->width;
3932 font.data = kmalloc(size, GFP_KERNEL);
3933 if (!font.data)
3934 return -ENOMEM;
3935 if (copy_from_user(font.data, op->data, size)) {
3936 kfree(font.data);
3937 return -EFAULT;
3938 }
3939 acquire_console_sem();
3940 if (vc->vc_sw->con_font_set)
3941 rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
3942 else
3943 rc = -ENOSYS;
3944 release_console_sem();
3945 kfree(font.data);
3946 return rc;
3947 }
3948
3949 static int con_font_default(struct vc_data *vc, struct console_font_op *op)
3950 {
3951 struct console_font font = {.width = op->width, .height = op->height};
3952 char name[MAX_FONT_NAME];
3953 char *s = name;
3954 int rc;
3955
3956 if (vc->vc_mode != KD_TEXT)
3957 return -EINVAL;
3958
3959 if (!op->data)
3960 s = NULL;
3961 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0)
3962 return -EFAULT;
3963 else
3964 name[MAX_FONT_NAME - 1] = 0;
3965
3966 acquire_console_sem();
3967 if (vc->vc_sw->con_font_default)
3968 rc = vc->vc_sw->con_font_default(vc, &font, s);
3969 else
3970 rc = -ENOSYS;
3971 release_console_sem();
3972 if (!rc) {
3973 op->width = font.width;
3974 op->height = font.height;
3975 }
3976 return rc;
3977 }
3978
3979 static int con_font_copy(struct vc_data *vc, struct console_font_op *op)
3980 {
3981 int con = op->height;
3982 int rc;
3983
3984 if (vc->vc_mode != KD_TEXT)
3985 return -EINVAL;
3986
3987 acquire_console_sem();
3988 if (!vc->vc_sw->con_font_copy)
3989 rc = -ENOSYS;
3990 else if (con < 0 || !vc_cons_allocated(con))
3991 rc = -ENOTTY;
3992 else if (con == vc->vc_num) /* nothing to do */
3993 rc = 0;
3994 else
3995 rc = vc->vc_sw->con_font_copy(vc, con);
3996 release_console_sem();
3997 return rc;
3998 }
3999
4000 int con_font_op(struct vc_data *vc, struct console_font_op *op)
4001 {
4002 switch (op->op) {
4003 case KD_FONT_OP_SET:
4004 return con_font_set(vc, op);
4005 case KD_FONT_OP_GET:
4006 return con_font_get(vc, op);
4007 case KD_FONT_OP_SET_DEFAULT:
4008 return con_font_default(vc, op);
4009 case KD_FONT_OP_COPY:
4010 return con_font_copy(vc, op);
4011 }
4012 return -ENOSYS;
4013 }
4014
4015 /*
4016 * Interface exported to selection and vcs.
4017 */
4018
4019 /* used by selection */
4020 u16 screen_glyph(struct vc_data *vc, int offset)
4021 {
4022 u16 w = scr_readw(screenpos(vc, offset, 1));
4023 u16 c = w & 0xff;
4024
4025 if (w & vc->vc_hi_font_mask)
4026 c |= 0x100;
4027 return c;
4028 }
4029 EXPORT_SYMBOL_GPL(screen_glyph);
4030
4031 /* used by vcs - note the word offset */
4032 unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed)
4033 {
4034 return screenpos(vc, 2 * w_offset, viewed);
4035 }
4036
4037 void getconsxy(struct vc_data *vc, unsigned char *p)
4038 {
4039 p[0] = vc->vc_x;
4040 p[1] = vc->vc_y;
4041 }
4042
4043 void putconsxy(struct vc_data *vc, unsigned char *p)
4044 {
4045 hide_cursor(vc);
4046 gotoxy(vc, p[0], p[1]);
4047 set_cursor(vc);
4048 }
4049
4050 u16 vcs_scr_readw(struct vc_data *vc, const u16 *org)
4051 {
4052 if ((unsigned long)org == vc->vc_pos && softcursor_original != -1)
4053 return softcursor_original;
4054 return scr_readw(org);
4055 }
4056
4057 void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org)
4058 {
4059 scr_writew(val, org);
4060 if ((unsigned long)org == vc->vc_pos) {
4061 softcursor_original = -1;
4062 add_softcursor(vc);
4063 }
4064 }
4065
4066 /*
4067 * Visible symbols for modules
4068 */
4069
4070 EXPORT_SYMBOL(color_table);
4071 EXPORT_SYMBOL(default_red);
4072 EXPORT_SYMBOL(default_grn);
4073 EXPORT_SYMBOL(default_blu);
4074 EXPORT_SYMBOL(update_region);
4075 EXPORT_SYMBOL(redraw_screen);
4076 EXPORT_SYMBOL(vc_resize);
4077 EXPORT_SYMBOL(fg_console);
4078 EXPORT_SYMBOL(console_blank_hook);
4079 EXPORT_SYMBOL(console_blanked);
4080 EXPORT_SYMBOL(vc_cons);
4081 #ifndef VT_SINGLE_DRIVER
4082 EXPORT_SYMBOL(take_over_console);
4083 EXPORT_SYMBOL(give_up_console);
4084 #endif
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