projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / char / vt.c
1 /*
2 * linux/drivers/char/vt.c
3 *
4 * Copyright (C) 1991, 1992 Linus Torvalds
5 */
6
7 /*
8 * Hopefully this will be a rather complete VT102 implementation.
9 *
10 * Beeping thanks to John T Kohl.
11 *
12 * Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics
13 * Chars, and VT100 enhancements by Peter MacDonald.
14 *
15 * Copy and paste function by Andrew Haylett,
16 * some enhancements by Alessandro Rubini.
17 *
18 * Code to check for different video-cards mostly by Galen Hunt,
19 * <g-hunt@ee.utah.edu>
20 *
21 * Rudimentary ISO 10646/Unicode/UTF-8 character set support by
22 * Markus Kuhn, <mskuhn@immd4.informatik.uni-erlangen.de>.
23 *
24 * Dynamic allocation of consoles, aeb@cwi.nl, May 1994
25 * Resizing of consoles, aeb, 940926
26 *
27 * Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94
28 * <poe@daimi.aau.dk>
29 *
30 * User-defined bell sound, new setterm control sequences and printk
31 * redirection by Martin Mares <mj@k332.feld.cvut.cz> 19-Nov-95
32 *
33 * APM screenblank bug fixed Takashi Manabe <manabe@roy.dsl.tutics.tut.jp>
34 *
35 * Merge with the abstract console driver by Geert Uytterhoeven
36 * <geert@linux-m68k.org>, Jan 1997.
37 *
38 * Original m68k console driver modifications by
39 *
40 * - Arno Griffioen <arno@usn.nl>
41 * - David Carter <carter@cs.bris.ac.uk>
42 *
43 * The abstract console driver provides a generic interface for a text
44 * console. It supports VGA text mode, frame buffer based graphical consoles
45 * and special graphics processors that are only accessible through some
46 * registers (e.g. a TMS340x0 GSP).
47 *
48 * The interface to the hardware is specified using a special structure
49 * (struct consw) which contains function pointers to console operations
50 * (see <linux/console.h> for more information).
51 *
52 * Support for changeable cursor shape
53 * by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997
54 *
55 * Ported to i386 and con_scrolldelta fixed
56 * by Emmanuel Marty <core@ggi-project.org>, April 1998
57 *
58 * Resurrected character buffers in videoram plus lots of other trickery
59 * by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998
60 *
61 * Removed old-style timers, introduced console_timer, made timer
62 * deletion SMP-safe. 17Jun00, Andrew Morton
63 *
64 * Removed console_lock, enabled interrupts across all console operations
65 * 13 March 2001, Andrew Morton
66 *
67 * Fixed UTF-8 mode so alternate charset modes always work according
68 * to control sequences interpreted in do_con_trol function
69 * preserving backward VT100 semigraphics compatibility,
70 * malformed UTF sequences represented as sequences of replacement glyphs,
71 * original codes or '?' as a last resort if replacement glyph is undefined
72 * by Adam Tla/lka <atlka@pg.gda.pl>, Aug 2006
73 */
74
75 #include <linux/module.h>
76 #include <linux/types.h>
77 #include <linux/sched.h>
78 #include <linux/tty.h>
79 #include <linux/tty_flip.h>
80 #include <linux/kernel.h>
81 #include <linux/string.h>
82 #include <linux/errno.h>
83 #include <linux/kd.h>
84 #include <linux/slab.h>
85 #include <linux/major.h>
86 #include <linux/mm.h>
87 #include <linux/console.h>
88 #include <linux/init.h>
89 #include <linux/mutex.h>
90 #include <linux/vt_kern.h>
91 #include <linux/selection.h>
92 #include <linux/smp_lock.h>
93 #include <linux/tiocl.h>
94 #include <linux/kbd_kern.h>
95 #include <linux/consolemap.h>
96 #include <linux/timer.h>
97 #include <linux/interrupt.h>
98 #include <linux/workqueue.h>
99 #include <linux/pm.h>
100 #include <linux/font.h>
101 #include <linux/bitops.h>
102 #include <linux/notifier.h>
103 #include <linux/device.h>
104 #include <linux/io.h>
105 #include <asm/system.h>
106 #include <linux/uaccess.h>
107
108 #define MAX_NR_CON_DRIVER 16
109
110 #define CON_DRIVER_FLAG_MODULE 1
111 #define CON_DRIVER_FLAG_INIT 2
112 #define CON_DRIVER_FLAG_ATTR 4
113
114 struct con_driver {
115 const struct consw *con;
116 const char *desc;
117 struct device *dev;
118 int node;
119 int first;
120 int last;
121 int flag;
122 };
123
124 static struct con_driver registered_con_driver[MAX_NR_CON_DRIVER];
125 const struct consw *conswitchp;
126
127 /* A bitmap for codes <32. A bit of 1 indicates that the code
128 * corresponding to that bit number invokes some special action
129 * (such as cursor movement) and should not be displayed as a
130 * glyph unless the disp_ctrl mode is explicitly enabled.
131 */
132 #define CTRL_ACTION 0x0d00ff81
133 #define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */
134
135 /*
136 * Here is the default bell parameters: 750HZ, 1/8th of a second
137 */
138 #define DEFAULT_BELL_PITCH 750
139 #define DEFAULT_BELL_DURATION (HZ/8)
140
141 struct vc vc_cons [MAX_NR_CONSOLES];
142
143 #ifndef VT_SINGLE_DRIVER
144 static const struct consw *con_driver_map[MAX_NR_CONSOLES];
145 #endif
146
147 static int con_open(struct tty_struct *, struct file *);
148 static void vc_init(struct vc_data *vc, unsigned int rows,
149 unsigned int cols, int do_clear);
150 static void gotoxy(struct vc_data *vc, int new_x, int new_y);
151 static void save_cur(struct vc_data *vc);
152 static void reset_terminal(struct vc_data *vc, int do_clear);
153 static void con_flush_chars(struct tty_struct *tty);
154 static int set_vesa_blanking(char __user *p);
155 static void set_cursor(struct vc_data *vc);
156 static void hide_cursor(struct vc_data *vc);
157 static void console_callback(struct work_struct *ignored);
158 static void blank_screen_t(unsigned long dummy);
159 static void set_palette(struct vc_data *vc);
160
161 static int printable; /* Is console ready for printing? */
162 int default_utf8 = true;
163 module_param(default_utf8, int, S_IRUGO | S_IWUSR);
164
165 /*
166 * ignore_poke: don't unblank the screen when things are typed. This is
167 * mainly for the privacy of braille terminal users.
168 */
169 static int ignore_poke;
170
171 int do_poke_blanked_console;
172 int console_blanked;
173
174 static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
175 static int vesa_off_interval;
176 static int blankinterval = 10*60;
177 core_param(consoleblank, blankinterval, int, 0444);
178
179 static DECLARE_WORK(console_work, console_callback);
180
181 /*
182 * fg_console is the current virtual console,
183 * last_console is the last used one,
184 * want_console is the console we want to switch to,
185 * kmsg_redirect is the console for kernel messages,
186 */
187 int fg_console;
188 int last_console;
189 int want_console = -1;
190 int kmsg_redirect;
191
192 /*
193 * For each existing display, we have a pointer to console currently visible
194 * on that display, allowing consoles other than fg_console to be refreshed
195 * appropriately. Unless the low-level driver supplies its own display_fg
196 * variable, we use this one for the "master display".
197 */
198 static struct vc_data *master_display_fg;
199
200 /*
201 * Unfortunately, we need to delay tty echo when we're currently writing to the
202 * console since the code is (and always was) not re-entrant, so we schedule
203 * all flip requests to process context with schedule-task() and run it from
204 * console_callback().
205 */
206
207 /*
208 * For the same reason, we defer scrollback to the console callback.
209 */
210 static int scrollback_delta;
211
212 /*
213 * Hook so that the power management routines can (un)blank
214 * the console on our behalf.
215 */
216 int (*console_blank_hook)(int);
217
218 static DEFINE_TIMER(console_timer, blank_screen_t, 0, 0);
219 static int blank_state;
220 static int blank_timer_expired;
221 enum {
222 blank_off = 0,
223 blank_normal_wait,
224 blank_vesa_wait,
225 };
226
227 /*
228 * Notifier list for console events.
229 */
230 static ATOMIC_NOTIFIER_HEAD(vt_notifier_list);
231
232 int register_vt_notifier(struct notifier_block *nb)
233 {
234 return atomic_notifier_chain_register(&vt_notifier_list, nb);
235 }
236 EXPORT_SYMBOL_GPL(register_vt_notifier);
237
238 int unregister_vt_notifier(struct notifier_block *nb)
239 {
240 return atomic_notifier_chain_unregister(&vt_notifier_list, nb);
241 }
242 EXPORT_SYMBOL_GPL(unregister_vt_notifier);
243
244 static void notify_write(struct vc_data *vc, unsigned int unicode)
245 {
246 struct vt_notifier_param param = { .vc = vc, unicode = unicode };
247 atomic_notifier_call_chain(&vt_notifier_list, VT_WRITE, &param);
248 }
249
250 static void notify_update(struct vc_data *vc)
251 {
252 struct vt_notifier_param param = { .vc = vc };
253 atomic_notifier_call_chain(&vt_notifier_list, VT_UPDATE, &param);
254 }
255
256 /*
257 * Low-Level Functions
258 */
259
260 #define IS_FG(vc) ((vc)->vc_num == fg_console)
261
262 #ifdef VT_BUF_VRAM_ONLY
263 #define DO_UPDATE(vc) 0
264 #else
265 #define DO_UPDATE(vc) (CON_IS_VISIBLE(vc) && !console_blanked)
266 #endif
267
268 static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed)
269 {
270 unsigned short *p;
271
272 if (!viewed)
273 p = (unsigned short *)(vc->vc_origin + offset);
274 else if (!vc->vc_sw->con_screen_pos)
275 p = (unsigned short *)(vc->vc_visible_origin + offset);
276 else
277 p = vc->vc_sw->con_screen_pos(vc, offset);
278 return p;
279 }
280
281 static inline void scrolldelta(int lines)
282 {
283 scrollback_delta += lines;
284 schedule_console_callback();
285 }
286
287 void schedule_console_callback(void)
288 {
289 schedule_work(&console_work);
290 }
291
292 static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
293 {
294 unsigned short *d, *s;
295
296 if (t+nr >= b)
297 nr = b - t - 1;
298 if (b > vc->vc_rows || t >= b || nr < 1)
299 return;
300 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr))
301 return;
302 d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
303 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr));
304 scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row);
305 scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_video_erase_char,
306 vc->vc_size_row * nr);
307 }
308
309 static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
310 {
311 unsigned short *s;
312 unsigned int step;
313
314 if (t+nr >= b)
315 nr = b - t - 1;
316 if (b > vc->vc_rows || t >= b || nr < 1)
317 return;
318 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr))
319 return;
320 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
321 step = vc->vc_cols * nr;
322 scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row);
323 scr_memsetw(s, vc->vc_video_erase_char, 2 * step);
324 }
325
326 static void do_update_region(struct vc_data *vc, unsigned long start, int count)
327 {
328 #ifndef VT_BUF_VRAM_ONLY
329 unsigned int xx, yy, offset;
330 u16 *p;
331
332 p = (u16 *) start;
333 if (!vc->vc_sw->con_getxy) {
334 offset = (start - vc->vc_origin) / 2;
335 xx = offset % vc->vc_cols;
336 yy = offset / vc->vc_cols;
337 } else {
338 int nxx, nyy;
339 start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy);
340 xx = nxx; yy = nyy;
341 }
342 for(;;) {
343 u16 attrib = scr_readw(p) & 0xff00;
344 int startx = xx;
345 u16 *q = p;
346 while (xx < vc->vc_cols && count) {
347 if (attrib != (scr_readw(p) & 0xff00)) {
348 if (p > q)
349 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
350 startx = xx;
351 q = p;
352 attrib = scr_readw(p) & 0xff00;
353 }
354 p++;
355 xx++;
356 count--;
357 }
358 if (p > q)
359 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
360 if (!count)
361 break;
362 xx = 0;
363 yy++;
364 if (vc->vc_sw->con_getxy) {
365 p = (u16 *)start;
366 start = vc->vc_sw->con_getxy(vc, start, NULL, NULL);
367 }
368 }
369 #endif
370 }
371
372 void update_region(struct vc_data *vc, unsigned long start, int count)
373 {
374 WARN_CONSOLE_UNLOCKED();
375
376 if (DO_UPDATE(vc)) {
377 hide_cursor(vc);
378 do_update_region(vc, start, count);
379 set_cursor(vc);
380 }
381 }
382
383 /* Structure of attributes is hardware-dependent */
384
385 static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink,
386 u8 _underline, u8 _reverse, u8 _italic)
387 {
388 if (vc->vc_sw->con_build_attr)
389 return vc->vc_sw->con_build_attr(vc, _color, _intensity,
390 _blink, _underline, _reverse, _italic);
391
392 #ifndef VT_BUF_VRAM_ONLY
393 /*
394 * ++roman: I completely changed the attribute format for monochrome
395 * mode (!can_do_color). The formerly used MDA (monochrome display
396 * adapter) format didn't allow the combination of certain effects.
397 * Now the attribute is just a bit vector:
398 * Bit 0..1: intensity (0..2)
399 * Bit 2 : underline
400 * Bit 3 : reverse
401 * Bit 7 : blink
402 */
403 {
404 u8 a = _color;
405 if (!vc->vc_can_do_color)
406 return _intensity |
407 (_italic ? 2 : 0) |
408 (_underline ? 4 : 0) |
409 (_reverse ? 8 : 0) |
410 (_blink ? 0x80 : 0);
411 if (_italic)
412 a = (a & 0xF0) | vc->vc_itcolor;
413 else if (_underline)
414 a = (a & 0xf0) | vc->vc_ulcolor;
415 else if (_intensity == 0)
416 a = (a & 0xf0) | vc->vc_ulcolor;
417 if (_reverse)
418 a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77);
419 if (_blink)
420 a ^= 0x80;
421 if (_intensity == 2)
422 a ^= 0x08;
423 if (vc->vc_hi_font_mask == 0x100)
424 a <<= 1;
425 return a;
426 }
427 #else
428 return 0;
429 #endif
430 }
431
432 static void update_attr(struct vc_data *vc)
433 {
434 vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity,
435 vc->vc_blink, vc->vc_underline,
436 vc->vc_reverse ^ vc->vc_decscnm, vc->vc_italic);
437 vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm, 0) << 8) | ' ';
438 }
439
440 /* Note: inverting the screen twice should revert to the original state */
441 void invert_screen(struct vc_data *vc, int offset, int count, int viewed)
442 {
443 unsigned short *p;
444
445 WARN_CONSOLE_UNLOCKED();
446
447 count /= 2;
448 p = screenpos(vc, offset, viewed);
449 if (vc->vc_sw->con_invert_region)
450 vc->vc_sw->con_invert_region(vc, p, count);
451 #ifndef VT_BUF_VRAM_ONLY
452 else {
453 u16 *q = p;
454 int cnt = count;
455 u16 a;
456
457 if (!vc->vc_can_do_color) {
458 while (cnt--) {
459 a = scr_readw(q);
460 a ^= 0x0800;
461 scr_writew(a, q);
462 q++;
463 }
464 } else if (vc->vc_hi_font_mask == 0x100) {
465 while (cnt--) {
466 a = scr_readw(q);
467 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4);
468 scr_writew(a, q);
469 q++;
470 }
471 } else {
472 while (cnt--) {
473 a = scr_readw(q);
474 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4);
475 scr_writew(a, q);
476 q++;
477 }
478 }
479 }
480 #endif
481 if (DO_UPDATE(vc))
482 do_update_region(vc, (unsigned long) p, count);
483 }
484
485 /* used by selection: complement pointer position */
486 void complement_pos(struct vc_data *vc, int offset)
487 {
488 static int old_offset = -1;
489 static unsigned short old;
490 static unsigned short oldx, oldy;
491
492 WARN_CONSOLE_UNLOCKED();
493
494 if (old_offset != -1 && old_offset >= 0 &&
495 old_offset < vc->vc_screenbuf_size) {
496 scr_writew(old, screenpos(vc, old_offset, 1));
497 if (DO_UPDATE(vc))
498 vc->vc_sw->con_putc(vc, old, oldy, oldx);
499 }
500
501 old_offset = offset;
502
503 if (offset != -1 && offset >= 0 &&
504 offset < vc->vc_screenbuf_size) {
505 unsigned short new;
506 unsigned short *p;
507 p = screenpos(vc, offset, 1);
508 old = scr_readw(p);
509 new = old ^ vc->vc_complement_mask;
510 scr_writew(new, p);
511 if (DO_UPDATE(vc)) {
512 oldx = (offset >> 1) % vc->vc_cols;
513 oldy = (offset >> 1) / vc->vc_cols;
514 vc->vc_sw->con_putc(vc, new, oldy, oldx);
515 }
516 }
517
518 }
519
520 static void insert_char(struct vc_data *vc, unsigned int nr)
521 {
522 unsigned short *p, *q = (unsigned short *)vc->vc_pos;
523
524 p = q + vc->vc_cols - nr - vc->vc_x;
525 while (--p >= q)
526 scr_writew(scr_readw(p), p + nr);
527 scr_memsetw(q, vc->vc_video_erase_char, nr * 2);
528 vc->vc_need_wrap = 0;
529 if (DO_UPDATE(vc)) {
530 unsigned short oldattr = vc->vc_attr;
531 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x, vc->vc_y, vc->vc_x + nr, 1,
532 vc->vc_cols - vc->vc_x - nr);
533 vc->vc_attr = vc->vc_video_erase_char >> 8;
534 while (nr--)
535 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y, vc->vc_x + nr);
536 vc->vc_attr = oldattr;
537 }
538 }
539
540 static void delete_char(struct vc_data *vc, unsigned int nr)
541 {
542 unsigned int i = vc->vc_x;
543 unsigned short *p = (unsigned short *)vc->vc_pos;
544
545 while (++i <= vc->vc_cols - nr) {
546 scr_writew(scr_readw(p+nr), p);
547 p++;
548 }
549 scr_memsetw(p, vc->vc_video_erase_char, nr * 2);
550 vc->vc_need_wrap = 0;
551 if (DO_UPDATE(vc)) {
552 unsigned short oldattr = vc->vc_attr;
553 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x + nr, vc->vc_y, vc->vc_x, 1,
554 vc->vc_cols - vc->vc_x - nr);
555 vc->vc_attr = vc->vc_video_erase_char >> 8;
556 while (nr--)
557 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y,
558 vc->vc_cols - 1 - nr);
559 vc->vc_attr = oldattr;
560 }
561 }
562
563 static int softcursor_original;
564
565 static void add_softcursor(struct vc_data *vc)
566 {
567 int i = scr_readw((u16 *) vc->vc_pos);
568 u32 type = vc->vc_cursor_type;
569
570 if (! (type & 0x10)) return;
571 if (softcursor_original != -1) return;
572 softcursor_original = i;
573 i |= ((type >> 8) & 0xff00 );
574 i ^= ((type) & 0xff00 );
575 if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000;
576 if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700;
577 scr_writew(i, (u16 *) vc->vc_pos);
578 if (DO_UPDATE(vc))
579 vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x);
580 }
581
582 static void hide_softcursor(struct vc_data *vc)
583 {
584 if (softcursor_original != -1) {
585 scr_writew(softcursor_original, (u16 *)vc->vc_pos);
586 if (DO_UPDATE(vc))
587 vc->vc_sw->con_putc(vc, softcursor_original,
588 vc->vc_y, vc->vc_x);
589 softcursor_original = -1;
590 }
591 }
592
593 static void hide_cursor(struct vc_data *vc)
594 {
595 if (vc == sel_cons)
596 clear_selection();
597 vc->vc_sw->con_cursor(vc, CM_ERASE);
598 hide_softcursor(vc);
599 }
600
601 static void set_cursor(struct vc_data *vc)
602 {
603 if (!IS_FG(vc) || console_blanked ||
604 vc->vc_mode == KD_GRAPHICS)
605 return;
606 if (vc->vc_deccm) {
607 if (vc == sel_cons)
608 clear_selection();
609 add_softcursor(vc);
610 if ((vc->vc_cursor_type & 0x0f) != 1)
611 vc->vc_sw->con_cursor(vc, CM_DRAW);
612 } else
613 hide_cursor(vc);
614 }
615
616 static void set_origin(struct vc_data *vc)
617 {
618 WARN_CONSOLE_UNLOCKED();
619
620 if (!CON_IS_VISIBLE(vc) ||
621 !vc->vc_sw->con_set_origin ||
622 !vc->vc_sw->con_set_origin(vc))
623 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
624 vc->vc_visible_origin = vc->vc_origin;
625 vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size;
626 vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x;
627 }
628
629 static inline void save_screen(struct vc_data *vc)
630 {
631 WARN_CONSOLE_UNLOCKED();
632
633 if (vc->vc_sw->con_save_screen)
634 vc->vc_sw->con_save_screen(vc);
635 }
636
637 /*
638 * Redrawing of screen
639 */
640
641 static void clear_buffer_attributes(struct vc_data *vc)
642 {
643 unsigned short *p = (unsigned short *)vc->vc_origin;
644 int count = vc->vc_screenbuf_size / 2;
645 int mask = vc->vc_hi_font_mask | 0xff;
646
647 for (; count > 0; count--, p++) {
648 scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p);
649 }
650 }
651
652 void redraw_screen(struct vc_data *vc, int is_switch)
653 {
654 int redraw = 0;
655
656 WARN_CONSOLE_UNLOCKED();
657
658 if (!vc) {
659 /* strange ... */
660 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
661 return;
662 }
663
664 if (is_switch) {
665 struct vc_data *old_vc = vc_cons[fg_console].d;
666 if (old_vc == vc)
667 return;
668 if (!CON_IS_VISIBLE(vc))
669 redraw = 1;
670 *vc->vc_display_fg = vc;
671 fg_console = vc->vc_num;
672 hide_cursor(old_vc);
673 if (!CON_IS_VISIBLE(old_vc)) {
674 save_screen(old_vc);
675 set_origin(old_vc);
676 }
677 } else {
678 hide_cursor(vc);
679 redraw = 1;
680 }
681
682 if (redraw) {
683 int update;
684 int old_was_color = vc->vc_can_do_color;
685
686 set_origin(vc);
687 update = vc->vc_sw->con_switch(vc);
688 set_palette(vc);
689 /*
690 * If console changed from mono<->color, the best we can do
691 * is to clear the buffer attributes. As it currently stands,
692 * rebuilding new attributes from the old buffer is not doable
693 * without overly complex code.
694 */
695 if (old_was_color != vc->vc_can_do_color) {
696 update_attr(vc);
697 clear_buffer_attributes(vc);
698 }
699 if (update && vc->vc_mode != KD_GRAPHICS)
700 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
701 }
702 set_cursor(vc);
703 if (is_switch) {
704 set_leds();
705 compute_shiftstate();
706 notify_update(vc);
707 }
708 }
709
710 /*
711 * Allocation, freeing and resizing of VTs.
712 */
713
714 int vc_cons_allocated(unsigned int i)
715 {
716 return (i < MAX_NR_CONSOLES && vc_cons[i].d);
717 }
718
719 static void visual_init(struct vc_data *vc, int num, int init)
720 {
721 /* ++Geert: vc->vc_sw->con_init determines console size */
722 if (vc->vc_sw)
723 module_put(vc->vc_sw->owner);
724 vc->vc_sw = conswitchp;
725 #ifndef VT_SINGLE_DRIVER
726 if (con_driver_map[num])
727 vc->vc_sw = con_driver_map[num];
728 #endif
729 __module_get(vc->vc_sw->owner);
730 vc->vc_num = num;
731 vc->vc_display_fg = &master_display_fg;
732 vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir;
733 vc->vc_uni_pagedir = 0;
734 vc->vc_hi_font_mask = 0;
735 vc->vc_complement_mask = 0;
736 vc->vc_can_do_color = 0;
737 vc->vc_sw->con_init(vc, init);
738 if (!vc->vc_complement_mask)
739 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
740 vc->vc_s_complement_mask = vc->vc_complement_mask;
741 vc->vc_size_row = vc->vc_cols << 1;
742 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
743 }
744
745 int vc_allocate(unsigned int currcons) /* return 0 on success */
746 {
747 WARN_CONSOLE_UNLOCKED();
748
749 if (currcons >= MAX_NR_CONSOLES)
750 return -ENXIO;
751 if (!vc_cons[currcons].d) {
752 struct vc_data *vc;
753 struct vt_notifier_param param;
754
755 /* prevent users from taking too much memory */
756 if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE))
757 return -EPERM;
758
759 /* due to the granularity of kmalloc, we waste some memory here */
760 /* the alloc is done in two steps, to optimize the common situation
761 of a 25x80 console (structsize=216, screenbuf_size=4000) */
762 /* although the numbers above are not valid since long ago, the
763 point is still up-to-date and the comment still has its value
764 even if only as a historical artifact. --mj, July 1998 */
765 param.vc = vc = kzalloc(sizeof(struct vc_data), GFP_KERNEL);
766 if (!vc)
767 return -ENOMEM;
768 vc_cons[currcons].d = vc;
769 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
770 visual_init(vc, currcons, 1);
771 if (!*vc->vc_uni_pagedir_loc)
772 con_set_default_unimap(vc);
773 if (!vc->vc_kmalloced)
774 vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL);
775 if (!vc->vc_screenbuf) {
776 kfree(vc);
777 vc_cons[currcons].d = NULL;
778 return -ENOMEM;
779 }
780 vc->vc_kmalloced = 1;
781 vc_init(vc, vc->vc_rows, vc->vc_cols, 1);
782 vcs_make_sysfs(currcons);
783 atomic_notifier_call_chain(&vt_notifier_list, VT_ALLOCATE, &param);
784 }
785 return 0;
786 }
787
788 static inline int resize_screen(struct vc_data *vc, int width, int height,
789 int user)
790 {
791 /* Resizes the resolution of the display adapater */
792 int err = 0;
793
794 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize)
795 err = vc->vc_sw->con_resize(vc, width, height, user);
796
797 return err;
798 }
799
800 /*
801 * Change # of rows and columns (0 means unchanged/the size of fg_console)
802 * [this is to be used together with some user program
803 * like resize that changes the hardware videomode]
804 */
805 #define VC_RESIZE_MAXCOL (32767)
806 #define VC_RESIZE_MAXROW (32767)
807
808 /**
809 * vc_do_resize - resizing method for the tty
810 * @tty: tty being resized
811 * @real_tty: real tty (different to tty if a pty/tty pair)
812 * @vc: virtual console private data
813 * @cols: columns
814 * @lines: lines
815 *
816 * Resize a virtual console, clipping according to the actual constraints.
817 * If the caller passes a tty structure then update the termios winsize
818 * information and perform any neccessary signal handling.
819 *
820 * Caller must hold the console semaphore. Takes the termios mutex and
821 * ctrl_lock of the tty IFF a tty is passed.
822 */
823
824 static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc,
825 unsigned int cols, unsigned int lines)
826 {
827 unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0;
828 unsigned int old_cols, old_rows, old_row_size, old_screen_size;
829 unsigned int new_cols, new_rows, new_row_size, new_screen_size;
830 unsigned int end, user;
831 unsigned short *newscreen;
832
833 WARN_CONSOLE_UNLOCKED();
834
835 if (!vc)
836 return -ENXIO;
837
838 user = vc->vc_resize_user;
839 vc->vc_resize_user = 0;
840
841 if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW)
842 return -EINVAL;
843
844 new_cols = (cols ? cols : vc->vc_cols);
845 new_rows = (lines ? lines : vc->vc_rows);
846 new_row_size = new_cols << 1;
847 new_screen_size = new_row_size * new_rows;
848
849 if (new_cols == vc->vc_cols && new_rows == vc->vc_rows)
850 return 0;
851
852 newscreen = kmalloc(new_screen_size, GFP_USER);
853 if (!newscreen)
854 return -ENOMEM;
855
856 old_rows = vc->vc_rows;
857 old_cols = vc->vc_cols;
858 old_row_size = vc->vc_size_row;
859 old_screen_size = vc->vc_screenbuf_size;
860
861 err = resize_screen(vc, new_cols, new_rows, user);
862 if (err) {
863 kfree(newscreen);
864 return err;
865 }
866
867 vc->vc_rows = new_rows;
868 vc->vc_cols = new_cols;
869 vc->vc_size_row = new_row_size;
870 vc->vc_screenbuf_size = new_screen_size;
871
872 rlth = min(old_row_size, new_row_size);
873 rrem = new_row_size - rlth;
874 old_origin = vc->vc_origin;
875 new_origin = (long) newscreen;
876 new_scr_end = new_origin + new_screen_size;
877
878 if (vc->vc_y > new_rows) {
879 if (old_rows - vc->vc_y < new_rows) {
880 /*
881 * Cursor near the bottom, copy contents from the
882 * bottom of buffer
883 */
884 old_origin += (old_rows - new_rows) * old_row_size;
885 end = vc->vc_scr_end;
886 } else {
887 /*
888 * Cursor is in no man's land, copy 1/2 screenful
889 * from the top and bottom of cursor position
890 */
891 old_origin += (vc->vc_y - new_rows/2) * old_row_size;
892 end = old_origin + (old_row_size * new_rows);
893 }
894 } else
895 /*
896 * Cursor near the top, copy contents from the top of buffer
897 */
898 end = (old_rows > new_rows) ? old_origin +
899 (old_row_size * new_rows) :
900 vc->vc_scr_end;
901
902 update_attr(vc);
903
904 while (old_origin < end) {
905 scr_memcpyw((unsigned short *) new_origin,
906 (unsigned short *) old_origin, rlth);
907 if (rrem)
908 scr_memsetw((void *)(new_origin + rlth),
909 vc->vc_video_erase_char, rrem);
910 old_origin += old_row_size;
911 new_origin += new_row_size;
912 }
913 if (new_scr_end > new_origin)
914 scr_memsetw((void *)new_origin, vc->vc_video_erase_char,
915 new_scr_end - new_origin);
916 if (vc->vc_kmalloced)
917 kfree(vc->vc_screenbuf);
918 vc->vc_screenbuf = newscreen;
919 vc->vc_kmalloced = 1;
920 vc->vc_screenbuf_size = new_screen_size;
921 set_origin(vc);
922
923 /* do part of a reset_terminal() */
924 vc->vc_top = 0;
925 vc->vc_bottom = vc->vc_rows;
926 gotoxy(vc, vc->vc_x, vc->vc_y);
927 save_cur(vc);
928
929 if (tty) {
930 /* Rewrite the requested winsize data with the actual
931 resulting sizes */
932 struct winsize ws;
933 memset(&ws, 0, sizeof(ws));
934 ws.ws_row = vc->vc_rows;
935 ws.ws_col = vc->vc_cols;
936 ws.ws_ypixel = vc->vc_scan_lines;
937 tty_do_resize(tty, &ws);
938 }
939
940 if (CON_IS_VISIBLE(vc))
941 update_screen(vc);
942 return err;
943 }
944
945 /**
946 * vc_resize - resize a VT
947 * @vc: virtual console
948 * @cols: columns
949 * @rows: rows
950 *
951 * Resize a virtual console as seen from the console end of things. We
952 * use the common vc_do_resize methods to update the structures. The
953 * caller must hold the console sem to protect console internals and
954 * vc->vc_tty
955 */
956
957 int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int rows)
958 {
959 return vc_do_resize(vc->vc_tty, vc, cols, rows);
960 }
961
962 /**
963 * vt_resize - resize a VT
964 * @tty: tty to resize
965 * @ws: winsize attributes
966 *
967 * Resize a virtual terminal. This is called by the tty layer as we
968 * register our own handler for resizing. The mutual helper does all
969 * the actual work.
970 *
971 * Takes the console sem and the called methods then take the tty
972 * termios_mutex and the tty ctrl_lock in that order.
973 */
974 static int vt_resize(struct tty_struct *tty, struct winsize *ws)
975 {
976 struct vc_data *vc = tty->driver_data;
977 int ret;
978
979 acquire_console_sem();
980 ret = vc_do_resize(tty, vc, ws->ws_col, ws->ws_row);
981 release_console_sem();
982 return ret;
983 }
984
985 void vc_deallocate(unsigned int currcons)
986 {
987 WARN_CONSOLE_UNLOCKED();
988
989 if (vc_cons_allocated(currcons)) {
990 struct vc_data *vc = vc_cons[currcons].d;
991 struct vt_notifier_param param = { .vc = vc };
992
993 atomic_notifier_call_chain(&vt_notifier_list, VT_DEALLOCATE, &param);
994 vcs_remove_sysfs(currcons);
995 vc->vc_sw->con_deinit(vc);
996 put_pid(vc->vt_pid);
997 module_put(vc->vc_sw->owner);
998 if (vc->vc_kmalloced)
999 kfree(vc->vc_screenbuf);
1000 if (currcons >= MIN_NR_CONSOLES)
1001 kfree(vc);
1002 vc_cons[currcons].d = NULL;
1003 }
1004 }
1005
1006 /*
1007 * VT102 emulator
1008 */
1009
1010 #define set_kbd(vc, x) set_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1011 #define clr_kbd(vc, x) clr_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1012 #define is_kbd(vc, x) vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1013
1014 #define decarm VC_REPEAT
1015 #define decckm VC_CKMODE
1016 #define kbdapplic VC_APPLIC
1017 #define lnm VC_CRLF
1018
1019 /*
1020 * this is what the terminal answers to a ESC-Z or csi0c query.
1021 */
1022 #define VT100ID "\033[?1;2c"
1023 #define VT102ID "\033[?6c"
1024
1025 unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7,
1026 8,12,10,14, 9,13,11,15 };
1027
1028 /* the default colour table, for VGA+ colour systems */
1029 int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
1030 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
1031 int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
1032 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
1033 int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
1034 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
1035
1036 module_param_array(default_red, int, NULL, S_IRUGO | S_IWUSR);
1037 module_param_array(default_grn, int, NULL, S_IRUGO | S_IWUSR);
1038 module_param_array(default_blu, int, NULL, S_IRUGO | S_IWUSR);
1039
1040 /*
1041 * gotoxy() must verify all boundaries, because the arguments
1042 * might also be negative. If the given position is out of
1043 * bounds, the cursor is placed at the nearest margin.
1044 */
1045 static void gotoxy(struct vc_data *vc, int new_x, int new_y)
1046 {
1047 int min_y, max_y;
1048
1049 if (new_x < 0)
1050 vc->vc_x = 0;
1051 else {
1052 if (new_x >= vc->vc_cols)
1053 vc->vc_x = vc->vc_cols - 1;
1054 else
1055 vc->vc_x = new_x;
1056 }
1057
1058 if (vc->vc_decom) {
1059 min_y = vc->vc_top;
1060 max_y = vc->vc_bottom;
1061 } else {
1062 min_y = 0;
1063 max_y = vc->vc_rows;
1064 }
1065 if (new_y < min_y)
1066 vc->vc_y = min_y;
1067 else if (new_y >= max_y)
1068 vc->vc_y = max_y - 1;
1069 else
1070 vc->vc_y = new_y;
1071 vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1);
1072 vc->vc_need_wrap = 0;
1073 }
1074
1075 /* for absolute user moves, when decom is set */
1076 static void gotoxay(struct vc_data *vc, int new_x, int new_y)
1077 {
1078 gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y);
1079 }
1080
1081 void scrollback(struct vc_data *vc, int lines)
1082 {
1083 if (!lines)
1084 lines = vc->vc_rows / 2;
1085 scrolldelta(-lines);
1086 }
1087
1088 void scrollfront(struct vc_data *vc, int lines)
1089 {
1090 if (!lines)
1091 lines = vc->vc_rows / 2;
1092 scrolldelta(lines);
1093 }
1094
1095 static void lf(struct vc_data *vc)
1096 {
1097 /* don't scroll if above bottom of scrolling region, or
1098 * if below scrolling region
1099 */
1100 if (vc->vc_y + 1 == vc->vc_bottom)
1101 scrup(vc, vc->vc_top, vc->vc_bottom, 1);
1102 else if (vc->vc_y < vc->vc_rows - 1) {
1103 vc->vc_y++;
1104 vc->vc_pos += vc->vc_size_row;
1105 }
1106 vc->vc_need_wrap = 0;
1107 notify_write(vc, '\n');
1108 }
1109
1110 static void ri(struct vc_data *vc)
1111 {
1112 /* don't scroll if below top of scrolling region, or
1113 * if above scrolling region
1114 */
1115 if (vc->vc_y == vc->vc_top)
1116 scrdown(vc, vc->vc_top, vc->vc_bottom, 1);
1117 else if (vc->vc_y > 0) {
1118 vc->vc_y--;
1119 vc->vc_pos -= vc->vc_size_row;
1120 }
1121 vc->vc_need_wrap = 0;
1122 }
1123
1124 static inline void cr(struct vc_data *vc)
1125 {
1126 vc->vc_pos -= vc->vc_x << 1;
1127 vc->vc_need_wrap = vc->vc_x = 0;
1128 notify_write(vc, '\r');
1129 }
1130
1131 static inline void bs(struct vc_data *vc)
1132 {
1133 if (vc->vc_x) {
1134 vc->vc_pos -= 2;
1135 vc->vc_x--;
1136 vc->vc_need_wrap = 0;
1137 notify_write(vc, '\b');
1138 }
1139 }
1140
1141 static inline void del(struct vc_data *vc)
1142 {
1143 /* ignored */
1144 }
1145
1146 static void csi_J(struct vc_data *vc, int vpar)
1147 {
1148 unsigned int count;
1149 unsigned short * start;
1150
1151 switch (vpar) {
1152 case 0: /* erase from cursor to end of display */
1153 count = (vc->vc_scr_end - vc->vc_pos) >> 1;
1154 start = (unsigned short *)vc->vc_pos;
1155 if (DO_UPDATE(vc)) {
1156 /* do in two stages */
1157 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1158 vc->vc_cols - vc->vc_x);
1159 vc->vc_sw->con_clear(vc, vc->vc_y + 1, 0,
1160 vc->vc_rows - vc->vc_y - 1,
1161 vc->vc_cols);
1162 }
1163 break;
1164 case 1: /* erase from start to cursor */
1165 count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1;
1166 start = (unsigned short *)vc->vc_origin;
1167 if (DO_UPDATE(vc)) {
1168 /* do in two stages */
1169 vc->vc_sw->con_clear(vc, 0, 0, vc->vc_y,
1170 vc->vc_cols);
1171 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1172 vc->vc_x + 1);
1173 }
1174 break;
1175 case 2: /* erase whole display */
1176 count = vc->vc_cols * vc->vc_rows;
1177 start = (unsigned short *)vc->vc_origin;
1178 if (DO_UPDATE(vc))
1179 vc->vc_sw->con_clear(vc, 0, 0,
1180 vc->vc_rows,
1181 vc->vc_cols);
1182 break;
1183 default:
1184 return;
1185 }
1186 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1187 vc->vc_need_wrap = 0;
1188 }
1189
1190 static void csi_K(struct vc_data *vc, int vpar)
1191 {
1192 unsigned int count;
1193 unsigned short * start;
1194
1195 switch (vpar) {
1196 case 0: /* erase from cursor to end of line */
1197 count = vc->vc_cols - vc->vc_x;
1198 start = (unsigned short *)vc->vc_pos;
1199 if (DO_UPDATE(vc))
1200 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1201 vc->vc_cols - vc->vc_x);
1202 break;
1203 case 1: /* erase from start of line to cursor */
1204 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1205 count = vc->vc_x + 1;
1206 if (DO_UPDATE(vc))
1207 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1208 vc->vc_x + 1);
1209 break;
1210 case 2: /* erase whole line */
1211 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1212 count = vc->vc_cols;
1213 if (DO_UPDATE(vc))
1214 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1215 vc->vc_cols);
1216 break;
1217 default:
1218 return;
1219 }
1220 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1221 vc->vc_need_wrap = 0;
1222 }
1223
1224 static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */
1225 { /* not vt100? */
1226 int count;
1227
1228 if (!vpar)
1229 vpar++;
1230 count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar;
1231
1232 scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count);
1233 if (DO_UPDATE(vc))
1234 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count);
1235 vc->vc_need_wrap = 0;
1236 }
1237
1238 static void default_attr(struct vc_data *vc)
1239 {
1240 vc->vc_intensity = 1;
1241 vc->vc_italic = 0;
1242 vc->vc_underline = 0;
1243 vc->vc_reverse = 0;
1244 vc->vc_blink = 0;
1245 vc->vc_color = vc->vc_def_color;
1246 }
1247
1248 /* console_sem is held */
1249 static void csi_m(struct vc_data *vc)
1250 {
1251 int i;
1252
1253 for (i = 0; i <= vc->vc_npar; i++)
1254 switch (vc->vc_par[i]) {
1255 case 0: /* all attributes off */
1256 default_attr(vc);
1257 break;
1258 case 1:
1259 vc->vc_intensity = 2;
1260 break;
1261 case 2:
1262 vc->vc_intensity = 0;
1263 break;
1264 case 3:
1265 vc->vc_italic = 1;
1266 break;
1267 case 4:
1268 vc->vc_underline = 1;
1269 break;
1270 case 5:
1271 vc->vc_blink = 1;
1272 break;
1273 case 7:
1274 vc->vc_reverse = 1;
1275 break;
1276 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1277 * Select primary font, don't display
1278 * control chars if defined, don't set
1279 * bit 8 on output.
1280 */
1281 vc->vc_translate = set_translate(vc->vc_charset == 0
1282 ? vc->vc_G0_charset
1283 : vc->vc_G1_charset, vc);
1284 vc->vc_disp_ctrl = 0;
1285 vc->vc_toggle_meta = 0;
1286 break;
1287 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1288 * Select first alternate font, lets
1289 * chars < 32 be displayed as ROM chars.
1290 */
1291 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1292 vc->vc_disp_ctrl = 1;
1293 vc->vc_toggle_meta = 0;
1294 break;
1295 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1296 * Select second alternate font, toggle
1297 * high bit before displaying as ROM char.
1298 */
1299 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1300 vc->vc_disp_ctrl = 1;
1301 vc->vc_toggle_meta = 1;
1302 break;
1303 case 21:
1304 case 22:
1305 vc->vc_intensity = 1;
1306 break;
1307 case 23:
1308 vc->vc_italic = 0;
1309 break;
1310 case 24:
1311 vc->vc_underline = 0;
1312 break;
1313 case 25:
1314 vc->vc_blink = 0;
1315 break;
1316 case 27:
1317 vc->vc_reverse = 0;
1318 break;
1319 case 38: /* ANSI X3.64-1979 (SCO-ish?)
1320 * Enables underscore, white foreground
1321 * with white underscore (Linux - use
1322 * default foreground).
1323 */
1324 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1325 vc->vc_underline = 1;
1326 break;
1327 case 39: /* ANSI X3.64-1979 (SCO-ish?)
1328 * Disable underline option.
1329 * Reset colour to default? It did this
1330 * before...
1331 */
1332 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1333 vc->vc_underline = 0;
1334 break;
1335 case 49:
1336 vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f);
1337 break;
1338 default:
1339 if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37)
1340 vc->vc_color = color_table[vc->vc_par[i] - 30]
1341 | (vc->vc_color & 0xf0);
1342 else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47)
1343 vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4)
1344 | (vc->vc_color & 0x0f);
1345 break;
1346 }
1347 update_attr(vc);
1348 }
1349
1350 static void respond_string(const char *p, struct tty_struct *tty)
1351 {
1352 while (*p) {
1353 tty_insert_flip_char(tty, *p, 0);
1354 p++;
1355 }
1356 con_schedule_flip(tty);
1357 }
1358
1359 static void cursor_report(struct vc_data *vc, struct tty_struct *tty)
1360 {
1361 char buf[40];
1362
1363 sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1);
1364 respond_string(buf, tty);
1365 }
1366
1367 static inline void status_report(struct tty_struct *tty)
1368 {
1369 respond_string("\033[0n", tty); /* Terminal ok */
1370 }
1371
1372 static inline void respond_ID(struct tty_struct * tty)
1373 {
1374 respond_string(VT102ID, tty);
1375 }
1376
1377 void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry)
1378 {
1379 char buf[8];
1380
1381 sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx),
1382 (char)('!' + mry));
1383 respond_string(buf, tty);
1384 }
1385
1386 /* invoked via ioctl(TIOCLINUX) and through set_selection */
1387 int mouse_reporting(void)
1388 {
1389 return vc_cons[fg_console].d->vc_report_mouse;
1390 }
1391
1392 /* console_sem is held */
1393 static void set_mode(struct vc_data *vc, int on_off)
1394 {
1395 int i;
1396
1397 for (i = 0; i <= vc->vc_npar; i++)
1398 if (vc->vc_ques) {
1399 switch(vc->vc_par[i]) { /* DEC private modes set/reset */
1400 case 1: /* Cursor keys send ^[Ox/^[[x */
1401 if (on_off)
1402 set_kbd(vc, decckm);
1403 else
1404 clr_kbd(vc, decckm);
1405 break;
1406 case 3: /* 80/132 mode switch unimplemented */
1407 vc->vc_deccolm = on_off;
1408 #if 0
1409 vc_resize(deccolm ? 132 : 80, vc->vc_rows);
1410 /* this alone does not suffice; some user mode
1411 utility has to change the hardware regs */
1412 #endif
1413 break;
1414 case 5: /* Inverted screen on/off */
1415 if (vc->vc_decscnm != on_off) {
1416 vc->vc_decscnm = on_off;
1417 invert_screen(vc, 0, vc->vc_screenbuf_size, 0);
1418 update_attr(vc);
1419 }
1420 break;
1421 case 6: /* Origin relative/absolute */
1422 vc->vc_decom = on_off;
1423 gotoxay(vc, 0, 0);
1424 break;
1425 case 7: /* Autowrap on/off */
1426 vc->vc_decawm = on_off;
1427 break;
1428 case 8: /* Autorepeat on/off */
1429 if (on_off)
1430 set_kbd(vc, decarm);
1431 else
1432 clr_kbd(vc, decarm);
1433 break;
1434 case 9:
1435 vc->vc_report_mouse = on_off ? 1 : 0;
1436 break;
1437 case 25: /* Cursor on/off */
1438 vc->vc_deccm = on_off;
1439 break;
1440 case 1000:
1441 vc->vc_report_mouse = on_off ? 2 : 0;
1442 break;
1443 }
1444 } else {
1445 switch(vc->vc_par[i]) { /* ANSI modes set/reset */
1446 case 3: /* Monitor (display ctrls) */
1447 vc->vc_disp_ctrl = on_off;
1448 break;
1449 case 4: /* Insert Mode on/off */
1450 vc->vc_decim = on_off;
1451 break;
1452 case 20: /* Lf, Enter == CrLf/Lf */
1453 if (on_off)
1454 set_kbd(vc, lnm);
1455 else
1456 clr_kbd(vc, lnm);
1457 break;
1458 }
1459 }
1460 }
1461
1462 /* console_sem is held */
1463 static void setterm_command(struct vc_data *vc)
1464 {
1465 switch(vc->vc_par[0]) {
1466 case 1: /* set color for underline mode */
1467 if (vc->vc_can_do_color &&
1468 vc->vc_par[1] < 16) {
1469 vc->vc_ulcolor = color_table[vc->vc_par[1]];
1470 if (vc->vc_underline)
1471 update_attr(vc);
1472 }
1473 break;
1474 case 2: /* set color for half intensity mode */
1475 if (vc->vc_can_do_color &&
1476 vc->vc_par[1] < 16) {
1477 vc->vc_halfcolor = color_table[vc->vc_par[1]];
1478 if (vc->vc_intensity == 0)
1479 update_attr(vc);
1480 }
1481 break;
1482 case 8: /* store colors as defaults */
1483 vc->vc_def_color = vc->vc_attr;
1484 if (vc->vc_hi_font_mask == 0x100)
1485 vc->vc_def_color >>= 1;
1486 default_attr(vc);
1487 update_attr(vc);
1488 break;
1489 case 9: /* set blanking interval */
1490 blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60;
1491 poke_blanked_console();
1492 break;
1493 case 10: /* set bell frequency in Hz */
1494 if (vc->vc_npar >= 1)
1495 vc->vc_bell_pitch = vc->vc_par[1];
1496 else
1497 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1498 break;
1499 case 11: /* set bell duration in msec */
1500 if (vc->vc_npar >= 1)
1501 vc->vc_bell_duration = (vc->vc_par[1] < 2000) ?
1502 vc->vc_par[1] * HZ / 1000 : 0;
1503 else
1504 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1505 break;
1506 case 12: /* bring specified console to the front */
1507 if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1))
1508 set_console(vc->vc_par[1] - 1);
1509 break;
1510 case 13: /* unblank the screen */
1511 poke_blanked_console();
1512 break;
1513 case 14: /* set vesa powerdown interval */
1514 vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1515 break;
1516 case 15: /* activate the previous console */
1517 set_console(last_console);
1518 break;
1519 }
1520 }
1521
1522 /* console_sem is held */
1523 static void csi_at(struct vc_data *vc, unsigned int nr)
1524 {
1525 if (nr > vc->vc_cols - vc->vc_x)
1526 nr = vc->vc_cols - vc->vc_x;
1527 else if (!nr)
1528 nr = 1;
1529 insert_char(vc, nr);
1530 }
1531
1532 /* console_sem is held */
1533 static void csi_L(struct vc_data *vc, unsigned int nr)
1534 {
1535 if (nr > vc->vc_rows - vc->vc_y)
1536 nr = vc->vc_rows - vc->vc_y;
1537 else if (!nr)
1538 nr = 1;
1539 scrdown(vc, vc->vc_y, vc->vc_bottom, nr);
1540 vc->vc_need_wrap = 0;
1541 }
1542
1543 /* console_sem is held */
1544 static void csi_P(struct vc_data *vc, unsigned int nr)
1545 {
1546 if (nr > vc->vc_cols - vc->vc_x)
1547 nr = vc->vc_cols - vc->vc_x;
1548 else if (!nr)
1549 nr = 1;
1550 delete_char(vc, nr);
1551 }
1552
1553 /* console_sem is held */
1554 static void csi_M(struct vc_data *vc, unsigned int nr)
1555 {
1556 if (nr > vc->vc_rows - vc->vc_y)
1557 nr = vc->vc_rows - vc->vc_y;
1558 else if (!nr)
1559 nr=1;
1560 scrup(vc, vc->vc_y, vc->vc_bottom, nr);
1561 vc->vc_need_wrap = 0;
1562 }
1563
1564 /* console_sem is held (except via vc_init->reset_terminal */
1565 static void save_cur(struct vc_data *vc)
1566 {
1567 vc->vc_saved_x = vc->vc_x;
1568 vc->vc_saved_y = vc->vc_y;
1569 vc->vc_s_intensity = vc->vc_intensity;
1570 vc->vc_s_italic = vc->vc_italic;
1571 vc->vc_s_underline = vc->vc_underline;
1572 vc->vc_s_blink = vc->vc_blink;
1573 vc->vc_s_reverse = vc->vc_reverse;
1574 vc->vc_s_charset = vc->vc_charset;
1575 vc->vc_s_color = vc->vc_color;
1576 vc->vc_saved_G0 = vc->vc_G0_charset;
1577 vc->vc_saved_G1 = vc->vc_G1_charset;
1578 }
1579
1580 /* console_sem is held */
1581 static void restore_cur(struct vc_data *vc)
1582 {
1583 gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y);
1584 vc->vc_intensity = vc->vc_s_intensity;
1585 vc->vc_italic = vc->vc_s_italic;
1586 vc->vc_underline = vc->vc_s_underline;
1587 vc->vc_blink = vc->vc_s_blink;
1588 vc->vc_reverse = vc->vc_s_reverse;
1589 vc->vc_charset = vc->vc_s_charset;
1590 vc->vc_color = vc->vc_s_color;
1591 vc->vc_G0_charset = vc->vc_saved_G0;
1592 vc->vc_G1_charset = vc->vc_saved_G1;
1593 vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc);
1594 update_attr(vc);
1595 vc->vc_need_wrap = 0;
1596 }
1597
1598 enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey,
1599 EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd,
1600 ESpalette };
1601
1602 /* console_sem is held (except via vc_init()) */
1603 static void reset_terminal(struct vc_data *vc, int do_clear)
1604 {
1605 vc->vc_top = 0;
1606 vc->vc_bottom = vc->vc_rows;
1607 vc->vc_state = ESnormal;
1608 vc->vc_ques = 0;
1609 vc->vc_translate = set_translate(LAT1_MAP, vc);
1610 vc->vc_G0_charset = LAT1_MAP;
1611 vc->vc_G1_charset = GRAF_MAP;
1612 vc->vc_charset = 0;
1613 vc->vc_need_wrap = 0;
1614 vc->vc_report_mouse = 0;
1615 vc->vc_utf = default_utf8;
1616 vc->vc_utf_count = 0;
1617
1618 vc->vc_disp_ctrl = 0;
1619 vc->vc_toggle_meta = 0;
1620
1621 vc->vc_decscnm = 0;
1622 vc->vc_decom = 0;
1623 vc->vc_decawm = 1;
1624 vc->vc_deccm = 1;
1625 vc->vc_decim = 0;
1626
1627 set_kbd(vc, decarm);
1628 clr_kbd(vc, decckm);
1629 clr_kbd(vc, kbdapplic);
1630 clr_kbd(vc, lnm);
1631 kbd_table[vc->vc_num].lockstate = 0;
1632 kbd_table[vc->vc_num].slockstate = 0;
1633 kbd_table[vc->vc_num].ledmode = LED_SHOW_FLAGS;
1634 kbd_table[vc->vc_num].ledflagstate = kbd_table[vc->vc_num].default_ledflagstate;
1635 /* do not do set_leds here because this causes an endless tasklet loop
1636 when the keyboard hasn't been initialized yet */
1637
1638 vc->vc_cursor_type = CUR_DEFAULT;
1639 vc->vc_complement_mask = vc->vc_s_complement_mask;
1640
1641 default_attr(vc);
1642 update_attr(vc);
1643
1644 vc->vc_tab_stop[0] = 0x01010100;
1645 vc->vc_tab_stop[1] =
1646 vc->vc_tab_stop[2] =
1647 vc->vc_tab_stop[3] =
1648 vc->vc_tab_stop[4] =
1649 vc->vc_tab_stop[5] =
1650 vc->vc_tab_stop[6] =
1651 vc->vc_tab_stop[7] = 0x01010101;
1652
1653 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1654 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1655
1656 gotoxy(vc, 0, 0);
1657 save_cur(vc);
1658 if (do_clear)
1659 csi_J(vc, 2);
1660 }
1661
1662 /* console_sem is held */
1663 static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
1664 {
1665 /*
1666 * Control characters can be used in the _middle_
1667 * of an escape sequence.
1668 */
1669 switch (c) {
1670 case 0:
1671 return;
1672 case 7:
1673 if (vc->vc_bell_duration)
1674 kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration);
1675 return;
1676 case 8:
1677 bs(vc);
1678 return;
1679 case 9:
1680 vc->vc_pos -= (vc->vc_x << 1);
1681 while (vc->vc_x < vc->vc_cols - 1) {
1682 vc->vc_x++;
1683 if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31)))
1684 break;
1685 }
1686 vc->vc_pos += (vc->vc_x << 1);
1687 notify_write(vc, '\t');
1688 return;
1689 case 10: case 11: case 12:
1690 lf(vc);
1691 if (!is_kbd(vc, lnm))
1692 return;
1693 case 13:
1694 cr(vc);
1695 return;
1696 case 14:
1697 vc->vc_charset = 1;
1698 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1699 vc->vc_disp_ctrl = 1;
1700 return;
1701 case 15:
1702 vc->vc_charset = 0;
1703 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1704 vc->vc_disp_ctrl = 0;
1705 return;
1706 case 24: case 26:
1707 vc->vc_state = ESnormal;
1708 return;
1709 case 27:
1710 vc->vc_state = ESesc;
1711 return;
1712 case 127:
1713 del(vc);
1714 return;
1715 case 128+27:
1716 vc->vc_state = ESsquare;
1717 return;
1718 }
1719 switch(vc->vc_state) {
1720 case ESesc:
1721 vc->vc_state = ESnormal;
1722 switch (c) {
1723 case '[':
1724 vc->vc_state = ESsquare;
1725 return;
1726 case ']':
1727 vc->vc_state = ESnonstd;
1728 return;
1729 case '%':
1730 vc->vc_state = ESpercent;
1731 return;
1732 case 'E':
1733 cr(vc);
1734 lf(vc);
1735 return;
1736 case 'M':
1737 ri(vc);
1738 return;
1739 case 'D':
1740 lf(vc);
1741 return;
1742 case 'H':
1743 vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31));
1744 return;
1745 case 'Z':
1746 respond_ID(tty);
1747 return;
1748 case '7':
1749 save_cur(vc);
1750 return;
1751 case '8':
1752 restore_cur(vc);
1753 return;
1754 case '(':
1755 vc->vc_state = ESsetG0;
1756 return;
1757 case ')':
1758 vc->vc_state = ESsetG1;
1759 return;
1760 case '#':
1761 vc->vc_state = EShash;
1762 return;
1763 case 'c':
1764 reset_terminal(vc, 1);
1765 return;
1766 case '>': /* Numeric keypad */
1767 clr_kbd(vc, kbdapplic);
1768 return;
1769 case '=': /* Appl. keypad */
1770 set_kbd(vc, kbdapplic);
1771 return;
1772 }
1773 return;
1774 case ESnonstd:
1775 if (c=='P') { /* palette escape sequence */
1776 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1777 vc->vc_par[vc->vc_npar] = 0;
1778 vc->vc_npar = 0;
1779 vc->vc_state = ESpalette;
1780 return;
1781 } else if (c=='R') { /* reset palette */
1782 reset_palette(vc);
1783 vc->vc_state = ESnormal;
1784 } else
1785 vc->vc_state = ESnormal;
1786 return;
1787 case ESpalette:
1788 if ( (c>='0'&&c<='9') || (c>='A'&&c<='F') || (c>='a'&&c<='f') ) {
1789 vc->vc_par[vc->vc_npar++] = (c > '9' ? (c & 0xDF) - 'A' + 10 : c - '0');
1790 if (vc->vc_npar == 7) {
1791 int i = vc->vc_par[0] * 3, j = 1;
1792 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1793 vc->vc_palette[i++] += vc->vc_par[j++];
1794 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1795 vc->vc_palette[i++] += vc->vc_par[j++];
1796 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1797 vc->vc_palette[i] += vc->vc_par[j];
1798 set_palette(vc);
1799 vc->vc_state = ESnormal;
1800 }
1801 } else
1802 vc->vc_state = ESnormal;
1803 return;
1804 case ESsquare:
1805 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1806 vc->vc_par[vc->vc_npar] = 0;
1807 vc->vc_npar = 0;
1808 vc->vc_state = ESgetpars;
1809 if (c == '[') { /* Function key */
1810 vc->vc_state=ESfunckey;
1811 return;
1812 }
1813 vc->vc_ques = (c == '?');
1814 if (vc->vc_ques)
1815 return;
1816 case ESgetpars:
1817 if (c == ';' && vc->vc_npar < NPAR - 1) {
1818 vc->vc_npar++;
1819 return;
1820 } else if (c>='0' && c<='9') {
1821 vc->vc_par[vc->vc_npar] *= 10;
1822 vc->vc_par[vc->vc_npar] += c - '0';
1823 return;
1824 } else
1825 vc->vc_state = ESgotpars;
1826 case ESgotpars:
1827 vc->vc_state = ESnormal;
1828 switch(c) {
1829 case 'h':
1830 set_mode(vc, 1);
1831 return;
1832 case 'l':
1833 set_mode(vc, 0);
1834 return;
1835 case 'c':
1836 if (vc->vc_ques) {
1837 if (vc->vc_par[0])
1838 vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16);
1839 else
1840 vc->vc_cursor_type = CUR_DEFAULT;
1841 return;
1842 }
1843 break;
1844 case 'm':
1845 if (vc->vc_ques) {
1846 clear_selection();
1847 if (vc->vc_par[0])
1848 vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1];
1849 else
1850 vc->vc_complement_mask = vc->vc_s_complement_mask;
1851 return;
1852 }
1853 break;
1854 case 'n':
1855 if (!vc->vc_ques) {
1856 if (vc->vc_par[0] == 5)
1857 status_report(tty);
1858 else if (vc->vc_par[0] == 6)
1859 cursor_report(vc, tty);
1860 }
1861 return;
1862 }
1863 if (vc->vc_ques) {
1864 vc->vc_ques = 0;
1865 return;
1866 }
1867 switch(c) {
1868 case 'G': case '`':
1869 if (vc->vc_par[0])
1870 vc->vc_par[0]--;
1871 gotoxy(vc, vc->vc_par[0], vc->vc_y);
1872 return;
1873 case 'A':
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 'B': case 'e':
1879 if (!vc->vc_par[0])
1880 vc->vc_par[0]++;
1881 gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]);
1882 return;
1883 case 'C': case 'a':
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 'D':
1889 if (!vc->vc_par[0])
1890 vc->vc_par[0]++;
1891 gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y);
1892 return;
1893 case 'E':
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 'F':
1899 if (!vc->vc_par[0])
1900 vc->vc_par[0]++;
1901 gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]);
1902 return;
1903 case 'd':
1904 if (vc->vc_par[0])
1905 vc->vc_par[0]--;
1906 gotoxay(vc, vc->vc_x ,vc->vc_par[0]);
1907 return;
1908 case 'H': case 'f':
1909 if (vc->vc_par[0])
1910 vc->vc_par[0]--;
1911 if (vc->vc_par[1])
1912 vc->vc_par[1]--;
1913 gotoxay(vc, vc->vc_par[1], vc->vc_par[0]);
1914 return;
1915 case 'J':
1916 csi_J(vc, vc->vc_par[0]);
1917 return;
1918 case 'K':
1919 csi_K(vc, vc->vc_par[0]);
1920 return;
1921 case 'L':
1922 csi_L(vc, vc->vc_par[0]);
1923 return;
1924 case 'M':
1925 csi_M(vc, vc->vc_par[0]);
1926 return;
1927 case 'P':
1928 csi_P(vc, vc->vc_par[0]);
1929 return;
1930 case 'c':
1931 if (!vc->vc_par[0])
1932 respond_ID(tty);
1933 return;
1934 case 'g':
1935 if (!vc->vc_par[0])
1936 vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31));
1937 else if (vc->vc_par[0] == 3) {
1938 vc->vc_tab_stop[0] =
1939 vc->vc_tab_stop[1] =
1940 vc->vc_tab_stop[2] =
1941 vc->vc_tab_stop[3] =
1942 vc->vc_tab_stop[4] =
1943 vc->vc_tab_stop[5] =
1944 vc->vc_tab_stop[6] =
1945 vc->vc_tab_stop[7] = 0;
1946 }
1947 return;
1948 case 'm':
1949 csi_m(vc);
1950 return;
1951 case 'q': /* DECLL - but only 3 leds */
1952 /* map 0,1,2,3 to 0,1,2,4 */
1953 if (vc->vc_par[0] < 4)
1954 setledstate(kbd_table + vc->vc_num,
1955 (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4);
1956 return;
1957 case 'r':
1958 if (!vc->vc_par[0])
1959 vc->vc_par[0]++;
1960 if (!vc->vc_par[1])
1961 vc->vc_par[1] = vc->vc_rows;
1962 /* Minimum allowed region is 2 lines */
1963 if (vc->vc_par[0] < vc->vc_par[1] &&
1964 vc->vc_par[1] <= vc->vc_rows) {
1965 vc->vc_top = vc->vc_par[0] - 1;
1966 vc->vc_bottom = vc->vc_par[1];
1967 gotoxay(vc, 0, 0);
1968 }
1969 return;
1970 case 's':
1971 save_cur(vc);
1972 return;
1973 case 'u':
1974 restore_cur(vc);
1975 return;
1976 case 'X':
1977 csi_X(vc, vc->vc_par[0]);
1978 return;
1979 case '@':
1980 csi_at(vc, vc->vc_par[0]);
1981 return;
1982 case ']': /* setterm functions */
1983 setterm_command(vc);
1984 return;
1985 }
1986 return;
1987 case ESpercent:
1988 vc->vc_state = ESnormal;
1989 switch (c) {
1990 case '@': /* defined in ISO 2022 */
1991 vc->vc_utf = 0;
1992 return;
1993 case 'G': /* prelim official escape code */
1994 case '8': /* retained for compatibility */
1995 vc->vc_utf = 1;
1996 return;
1997 }
1998 return;
1999 case ESfunckey:
2000 vc->vc_state = ESnormal;
2001 return;
2002 case EShash:
2003 vc->vc_state = ESnormal;
2004 if (c == '8') {
2005 /* DEC screen alignment test. kludge :-) */
2006 vc->vc_video_erase_char =
2007 (vc->vc_video_erase_char & 0xff00) | 'E';
2008 csi_J(vc, 2);
2009 vc->vc_video_erase_char =
2010 (vc->vc_video_erase_char & 0xff00) | ' ';
2011 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
2012 }
2013 return;
2014 case ESsetG0:
2015 if (c == '0')
2016 vc->vc_G0_charset = GRAF_MAP;
2017 else if (c == 'B')
2018 vc->vc_G0_charset = LAT1_MAP;
2019 else if (c == 'U')
2020 vc->vc_G0_charset = IBMPC_MAP;
2021 else if (c == 'K')
2022 vc->vc_G0_charset = USER_MAP;
2023 if (vc->vc_charset == 0)
2024 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
2025 vc->vc_state = ESnormal;
2026 return;
2027 case ESsetG1:
2028 if (c == '0')
2029 vc->vc_G1_charset = GRAF_MAP;
2030 else if (c == 'B')
2031 vc->vc_G1_charset = LAT1_MAP;
2032 else if (c == 'U')
2033 vc->vc_G1_charset = IBMPC_MAP;
2034 else if (c == 'K')
2035 vc->vc_G1_charset = USER_MAP;
2036 if (vc->vc_charset == 1)
2037 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
2038 vc->vc_state = ESnormal;
2039 return;
2040 default:
2041 vc->vc_state = ESnormal;
2042 }
2043 }
2044
2045 /* This is a temporary buffer used to prepare a tty console write
2046 * so that we can easily avoid touching user space while holding the
2047 * console spinlock. It is allocated in con_init and is shared by
2048 * this code and the vc_screen read/write tty calls.
2049 *
2050 * We have to allocate this statically in the kernel data section
2051 * since console_init (and thus con_init) are called before any
2052 * kernel memory allocation is available.
2053 */
2054 char con_buf[CON_BUF_SIZE];
2055 DEFINE_MUTEX(con_buf_mtx);
2056
2057 /* is_double_width() is based on the wcwidth() implementation by
2058 * Markus Kuhn -- 2007-05-26 (Unicode 5.0)
2059 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
2060 */
2061 struct interval {
2062 uint32_t first;
2063 uint32_t last;
2064 };
2065
2066 static int bisearch(uint32_t ucs, const struct interval *table, int max)
2067 {
2068 int min = 0;
2069 int mid;
2070
2071 if (ucs < table[0].first || ucs > table[max].last)
2072 return 0;
2073 while (max >= min) {
2074 mid = (min + max) / 2;
2075 if (ucs > table[mid].last)
2076 min = mid + 1;
2077 else if (ucs < table[mid].first)
2078 max = mid - 1;
2079 else
2080 return 1;
2081 }
2082 return 0;
2083 }
2084
2085 static int is_double_width(uint32_t ucs)
2086 {
2087 static const struct interval double_width[] = {
2088 { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E },
2089 { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF },
2090 { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 },
2091 { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD }
2092 };
2093 return bisearch(ucs, double_width, ARRAY_SIZE(double_width) - 1);
2094 }
2095
2096 /* acquires console_sem */
2097 static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2098 {
2099 #ifdef VT_BUF_VRAM_ONLY
2100 #define FLUSH do { } while(0);
2101 #else
2102 #define FLUSH if (draw_x >= 0) { \
2103 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
2104 draw_x = -1; \
2105 }
2106 #endif
2107
2108 int c, tc, ok, n = 0, draw_x = -1;
2109 unsigned int currcons;
2110 unsigned long draw_from = 0, draw_to = 0;
2111 struct vc_data *vc;
2112 unsigned char vc_attr;
2113 struct vt_notifier_param param;
2114 uint8_t rescan;
2115 uint8_t inverse;
2116 uint8_t width;
2117 u16 himask, charmask;
2118 const unsigned char *orig_buf = NULL;
2119 int orig_count;
2120
2121 if (in_interrupt())
2122 return count;
2123
2124 might_sleep();
2125
2126 acquire_console_sem();
2127 vc = tty->driver_data;
2128 if (vc == NULL) {
2129 printk(KERN_ERR "vt: argh, driver_data is NULL !\n");
2130 release_console_sem();
2131 return 0;
2132 }
2133
2134 currcons = vc->vc_num;
2135 if (!vc_cons_allocated(currcons)) {
2136 /* could this happen? */
2137 static int error = 0;
2138 if (!error) {
2139 error = 1;
2140 printk("con_write: tty %d not allocated\n", currcons+1);
2141 }
2142 release_console_sem();
2143 return 0;
2144 }
2145 orig_buf = buf;
2146 orig_count = count;
2147
2148 himask = vc->vc_hi_font_mask;
2149 charmask = himask ? 0x1ff : 0xff;
2150
2151 /* undraw cursor first */
2152 if (IS_FG(vc))
2153 hide_cursor(vc);
2154
2155 param.vc = vc;
2156
2157 while (!tty->stopped && count) {
2158 int orig = *buf;
2159 c = orig;
2160 buf++;
2161 n++;
2162 count--;
2163 rescan = 0;
2164 inverse = 0;
2165 width = 1;
2166
2167 /* Do no translation at all in control states */
2168 if (vc->vc_state != ESnormal) {
2169 tc = c;
2170 } else if (vc->vc_utf && !vc->vc_disp_ctrl) {
2171 /* Combine UTF-8 into Unicode in vc_utf_char.
2172 * vc_utf_count is the number of continuation bytes still
2173 * expected to arrive.
2174 * vc_npar is the number of continuation bytes arrived so
2175 * far
2176 */
2177 rescan_last_byte:
2178 if ((c & 0xc0) == 0x80) {
2179 /* Continuation byte received */
2180 static const uint32_t utf8_length_changes[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff };
2181 if (vc->vc_utf_count) {
2182 vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f);
2183 vc->vc_npar++;
2184 if (--vc->vc_utf_count) {
2185 /* Still need some bytes */
2186 continue;
2187 }
2188 /* Got a whole character */
2189 c = vc->vc_utf_char;
2190 /* Reject overlong sequences */
2191 if (c <= utf8_length_changes[vc->vc_npar - 1] ||
2192 c > utf8_length_changes[vc->vc_npar])
2193 c = 0xfffd;
2194 } else {
2195 /* Unexpected continuation byte */
2196 vc->vc_utf_count = 0;
2197 c = 0xfffd;
2198 }
2199 } else {
2200 /* Single ASCII byte or first byte of a sequence received */
2201 if (vc->vc_utf_count) {
2202 /* Continuation byte expected */
2203 rescan = 1;
2204 vc->vc_utf_count = 0;
2205 c = 0xfffd;
2206 } else if (c > 0x7f) {
2207 /* First byte of a multibyte sequence received */
2208 vc->vc_npar = 0;
2209 if ((c & 0xe0) == 0xc0) {
2210 vc->vc_utf_count = 1;
2211 vc->vc_utf_char = (c & 0x1f);
2212 } else if ((c & 0xf0) == 0xe0) {
2213 vc->vc_utf_count = 2;
2214 vc->vc_utf_char = (c & 0x0f);
2215 } else if ((c & 0xf8) == 0xf0) {
2216 vc->vc_utf_count = 3;
2217 vc->vc_utf_char = (c & 0x07);
2218 } else if ((c & 0xfc) == 0xf8) {
2219 vc->vc_utf_count = 4;
2220 vc->vc_utf_char = (c & 0x03);
2221 } else if ((c & 0xfe) == 0xfc) {
2222 vc->vc_utf_count = 5;
2223 vc->vc_utf_char = (c & 0x01);
2224 } else {
2225 /* 254 and 255 are invalid */
2226 c = 0xfffd;
2227 }
2228 if (vc->vc_utf_count) {
2229 /* Still need some bytes */
2230 continue;
2231 }
2232 }
2233 /* Nothing to do if an ASCII byte was received */
2234 }
2235 /* End of UTF-8 decoding. */
2236 /* c is the received character, or U+FFFD for invalid sequences. */
2237 /* Replace invalid Unicode code points with U+FFFD too */
2238 if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff)
2239 c = 0xfffd;
2240 tc = c;
2241 } else { /* no utf or alternate charset mode */
2242 tc = vc_translate(vc, c);
2243 }
2244
2245 param.c = tc;
2246 if (atomic_notifier_call_chain(&vt_notifier_list, VT_PREWRITE,
2247 &param) == NOTIFY_STOP)
2248 continue;
2249
2250 /* If the original code was a control character we
2251 * only allow a glyph to be displayed if the code is
2252 * not normally used (such as for cursor movement) or
2253 * if the disp_ctrl mode has been explicitly enabled.
2254 * Certain characters (as given by the CTRL_ALWAYS
2255 * bitmap) are always displayed as control characters,
2256 * as the console would be pretty useless without
2257 * them; to display an arbitrary font position use the
2258 * direct-to-font zone in UTF-8 mode.
2259 */
2260 ok = tc && (c >= 32 ||
2261 !(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 :
2262 vc->vc_utf || ((CTRL_ACTION >> c) & 1)))
2263 && (c != 127 || vc->vc_disp_ctrl)
2264 && (c != 128+27);
2265
2266 if (vc->vc_state == ESnormal && ok) {
2267 if (vc->vc_utf && !vc->vc_disp_ctrl) {
2268 if (is_double_width(c))
2269 width = 2;
2270 }
2271 /* Now try to find out how to display it */
2272 tc = conv_uni_to_pc(vc, tc);
2273 if (tc & ~charmask) {
2274 if (tc == -1 || tc == -2) {
2275 continue; /* nothing to display */
2276 }
2277 /* Glyph not found */
2278 if ((!(vc->vc_utf && !vc->vc_disp_ctrl) || c < 128) && !(c & ~charmask)) {
2279 /* In legacy mode use the glyph we get by a 1:1 mapping.
2280 This would make absolutely no sense with Unicode in mind,
2281 but do this for ASCII characters since a font may lack
2282 Unicode mapping info and we don't want to end up with
2283 having question marks only. */
2284 tc = c;
2285 } else {
2286 /* Display U+FFFD. If it's not found, display an inverse question mark. */
2287 tc = conv_uni_to_pc(vc, 0xfffd);
2288 if (tc < 0) {
2289 inverse = 1;
2290 tc = conv_uni_to_pc(vc, '?');
2291 if (tc < 0) tc = '?';
2292 }
2293 }
2294 }
2295
2296 if (!inverse) {
2297 vc_attr = vc->vc_attr;
2298 } else {
2299 /* invert vc_attr */
2300 if (!vc->vc_can_do_color) {
2301 vc_attr = (vc->vc_attr) ^ 0x08;
2302 } else if (vc->vc_hi_font_mask == 0x100) {
2303 vc_attr = ((vc->vc_attr) & 0x11) | (((vc->vc_attr) & 0xe0) >> 4) | (((vc->vc_attr) & 0x0e) << 4);
2304 } else {
2305 vc_attr = ((vc->vc_attr) & 0x88) | (((vc->vc_attr) & 0x70) >> 4) | (((vc->vc_attr) & 0x07) << 4);
2306 }
2307 FLUSH
2308 }
2309
2310 while (1) {
2311 if (vc->vc_need_wrap || vc->vc_decim)
2312 FLUSH
2313 if (vc->vc_need_wrap) {
2314 cr(vc);
2315 lf(vc);
2316 }
2317 if (vc->vc_decim)
2318 insert_char(vc, 1);
2319 scr_writew(himask ?
2320 ((vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) :
2321 (vc_attr << 8) + tc,
2322 (u16 *) vc->vc_pos);
2323 if (DO_UPDATE(vc) && draw_x < 0) {
2324 draw_x = vc->vc_x;
2325 draw_from = vc->vc_pos;
2326 }
2327 if (vc->vc_x == vc->vc_cols - 1) {
2328 vc->vc_need_wrap = vc->vc_decawm;
2329 draw_to = vc->vc_pos + 2;
2330 } else {
2331 vc->vc_x++;
2332 draw_to = (vc->vc_pos += 2);
2333 }
2334
2335 if (!--width) break;
2336
2337 tc = conv_uni_to_pc(vc, ' '); /* A space is printed in the second column */
2338 if (tc < 0) tc = ' ';
2339 }
2340 notify_write(vc, c);
2341
2342 if (inverse) {
2343 FLUSH
2344 }
2345
2346 if (rescan) {
2347 rescan = 0;
2348 inverse = 0;
2349 width = 1;
2350 c = orig;
2351 goto rescan_last_byte;
2352 }
2353 continue;
2354 }
2355 FLUSH
2356 do_con_trol(tty, vc, orig);
2357 }
2358 FLUSH
2359 console_conditional_schedule();
2360 release_console_sem();
2361 notify_update(vc);
2362 return n;
2363 #undef FLUSH
2364 }
2365
2366 /*
2367 * This is the console switching callback.
2368 *
2369 * Doing console switching in a process context allows
2370 * us to do the switches asynchronously (needed when we want
2371 * to switch due to a keyboard interrupt). Synchronization
2372 * with other console code and prevention of re-entrancy is
2373 * ensured with console_sem.
2374 */
2375 static void console_callback(struct work_struct *ignored)
2376 {
2377 acquire_console_sem();
2378
2379 if (want_console >= 0) {
2380 if (want_console != fg_console &&
2381 vc_cons_allocated(want_console)) {
2382 hide_cursor(vc_cons[fg_console].d);
2383 change_console(vc_cons[want_console].d);
2384 /* we only changed when the console had already
2385 been allocated - a new console is not created
2386 in an interrupt routine */
2387 }
2388 want_console = -1;
2389 }
2390 if (do_poke_blanked_console) { /* do not unblank for a LED change */
2391 do_poke_blanked_console = 0;
2392 poke_blanked_console();
2393 }
2394 if (scrollback_delta) {
2395 struct vc_data *vc = vc_cons[fg_console].d;
2396 clear_selection();
2397 if (vc->vc_mode == KD_TEXT)
2398 vc->vc_sw->con_scrolldelta(vc, scrollback_delta);
2399 scrollback_delta = 0;
2400 }
2401 if (blank_timer_expired) {
2402 do_blank_screen(0);
2403 blank_timer_expired = 0;
2404 }
2405 notify_update(vc_cons[fg_console].d);
2406
2407 release_console_sem();
2408 }
2409
2410 int set_console(int nr)
2411 {
2412 struct vc_data *vc = vc_cons[fg_console].d;
2413
2414 if (!vc_cons_allocated(nr) || vt_dont_switch ||
2415 (vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) {
2416
2417 /*
2418 * Console switch will fail in console_callback() or
2419 * change_console() so there is no point scheduling
2420 * the callback
2421 *
2422 * Existing set_console() users don't check the return
2423 * value so this shouldn't break anything
2424 */
2425 return -EINVAL;
2426 }
2427
2428 want_console = nr;
2429 schedule_console_callback();
2430
2431 return 0;
2432 }
2433
2434 struct tty_driver *console_driver;
2435
2436 #ifdef CONFIG_VT_CONSOLE
2437
2438 /*
2439 * Console on virtual terminal
2440 *
2441 * The console must be locked when we get here.
2442 */
2443
2444 static void vt_console_print(struct console *co, const char *b, unsigned count)
2445 {
2446 struct vc_data *vc = vc_cons[fg_console].d;
2447 unsigned char c;
2448 static DEFINE_SPINLOCK(printing_lock);
2449 const ushort *start;
2450 ushort cnt = 0;
2451 ushort myx;
2452
2453 /* console busy or not yet initialized */
2454 if (!printable)
2455 return;
2456 if (!spin_trylock(&printing_lock))
2457 return;
2458
2459 if (kmsg_redirect && vc_cons_allocated(kmsg_redirect - 1))
2460 vc = vc_cons[kmsg_redirect - 1].d;
2461
2462 /* read `x' only after setting currcons properly (otherwise
2463 the `x' macro will read the x of the foreground console). */
2464 myx = vc->vc_x;
2465
2466 if (!vc_cons_allocated(fg_console)) {
2467 /* impossible */
2468 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2469 goto quit;
2470 }
2471
2472 if (vc->vc_mode != KD_TEXT)
2473 goto quit;
2474
2475 /* undraw cursor first */
2476 if (IS_FG(vc))
2477 hide_cursor(vc);
2478
2479 start = (ushort *)vc->vc_pos;
2480
2481 /* Contrived structure to try to emulate original need_wrap behaviour
2482 * Problems caused when we have need_wrap set on '\n' character */
2483 while (count--) {
2484 c = *b++;
2485 if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) {
2486 if (cnt > 0) {
2487 if (CON_IS_VISIBLE(vc))
2488 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2489 vc->vc_x += cnt;
2490 if (vc->vc_need_wrap)
2491 vc->vc_x--;
2492 cnt = 0;
2493 }
2494 if (c == 8) { /* backspace */
2495 bs(vc);
2496 start = (ushort *)vc->vc_pos;
2497 myx = vc->vc_x;
2498 continue;
2499 }
2500 if (c != 13)
2501 lf(vc);
2502 cr(vc);
2503 start = (ushort *)vc->vc_pos;
2504 myx = vc->vc_x;
2505 if (c == 10 || c == 13)
2506 continue;
2507 }
2508 scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos);
2509 notify_write(vc, c);
2510 cnt++;
2511 if (myx == vc->vc_cols - 1) {
2512 vc->vc_need_wrap = 1;
2513 continue;
2514 }
2515 vc->vc_pos += 2;
2516 myx++;
2517 }
2518 if (cnt > 0) {
2519 if (CON_IS_VISIBLE(vc))
2520 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2521 vc->vc_x += cnt;
2522 if (vc->vc_x == vc->vc_cols) {
2523 vc->vc_x--;
2524 vc->vc_need_wrap = 1;
2525 }
2526 }
2527 set_cursor(vc);
2528 notify_update(vc);
2529
2530 quit:
2531 spin_unlock(&printing_lock);
2532 }
2533
2534 static struct tty_driver *vt_console_device(struct console *c, int *index)
2535 {
2536 *index = c->index ? c->index-1 : fg_console;
2537 return console_driver;
2538 }
2539
2540 static struct console vt_console_driver = {
2541 .name = "tty",
2542 .write = vt_console_print,
2543 .device = vt_console_device,
2544 .unblank = unblank_screen,
2545 .flags = CON_PRINTBUFFER,
2546 .index = -1,
2547 };
2548 #endif
2549
2550 /*
2551 * Handling of Linux-specific VC ioctls
2552 */
2553
2554 /*
2555 * Generally a bit racy with respect to console_sem().
2556 *
2557 * There are some functions which don't need it.
2558 *
2559 * There are some functions which can sleep for arbitrary periods
2560 * (paste_selection) but we don't need the lock there anyway.
2561 *
2562 * set_selection has locking, and definitely needs it
2563 */
2564
2565 int tioclinux(struct tty_struct *tty, unsigned long arg)
2566 {
2567 char type, data;
2568 char __user *p = (char __user *)arg;
2569 int lines;
2570 int ret;
2571
2572 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN))
2573 return -EPERM;
2574 if (get_user(type, p))
2575 return -EFAULT;
2576 ret = 0;
2577
2578 lock_kernel();
2579
2580 switch (type)
2581 {
2582 case TIOCL_SETSEL:
2583 acquire_console_sem();
2584 ret = set_selection((struct tiocl_selection __user *)(p+1), tty);
2585 release_console_sem();
2586 break;
2587 case TIOCL_PASTESEL:
2588 ret = paste_selection(tty);
2589 break;
2590 case TIOCL_UNBLANKSCREEN:
2591 acquire_console_sem();
2592 unblank_screen();
2593 release_console_sem();
2594 break;
2595 case TIOCL_SELLOADLUT:
2596 ret = sel_loadlut(p);
2597 break;
2598 case TIOCL_GETSHIFTSTATE:
2599
2600 /*
2601 * Make it possible to react to Shift+Mousebutton.
2602 * Note that 'shift_state' is an undocumented
2603 * kernel-internal variable; programs not closely
2604 * related to the kernel should not use this.
2605 */
2606 data = shift_state;
2607 ret = __put_user(data, p);
2608 break;
2609 case TIOCL_GETMOUSEREPORTING:
2610 data = mouse_reporting();
2611 ret = __put_user(data, p);
2612 break;
2613 case TIOCL_SETVESABLANK:
2614 ret = set_vesa_blanking(p);
2615 break;
2616 case TIOCL_GETKMSGREDIRECT:
2617 data = kmsg_redirect;
2618 ret = __put_user(data, p);
2619 break;
2620 case TIOCL_SETKMSGREDIRECT:
2621 if (!capable(CAP_SYS_ADMIN)) {
2622 ret = -EPERM;
2623 } else {
2624 if (get_user(data, p+1))
2625 ret = -EFAULT;
2626 else
2627 kmsg_redirect = data;
2628 }
2629 break;
2630 case TIOCL_GETFGCONSOLE:
2631 ret = fg_console;
2632 break;
2633 case TIOCL_SCROLLCONSOLE:
2634 if (get_user(lines, (s32 __user *)(p+4))) {
2635 ret = -EFAULT;
2636 } else {
2637 scrollfront(vc_cons[fg_console].d, lines);
2638 ret = 0;
2639 }
2640 break;
2641 case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
2642 acquire_console_sem();
2643 ignore_poke = 1;
2644 do_blank_screen(0);
2645 release_console_sem();
2646 break;
2647 case TIOCL_BLANKEDSCREEN:
2648 ret = console_blanked;
2649 break;
2650 default:
2651 ret = -EINVAL;
2652 break;
2653 }
2654 unlock_kernel();
2655 return ret;
2656 }
2657
2658 /*
2659 * /dev/ttyN handling
2660 */
2661
2662 static int con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2663 {
2664 int retval;
2665
2666 retval = do_con_write(tty, buf, count);
2667 con_flush_chars(tty);
2668
2669 return retval;
2670 }
2671
2672 static int con_put_char(struct tty_struct *tty, unsigned char ch)
2673 {
2674 if (in_interrupt())
2675 return 0; /* n_r3964 calls put_char() from interrupt context */
2676 return do_con_write(tty, &ch, 1);
2677 }
2678
2679 static int con_write_room(struct tty_struct *tty)
2680 {
2681 if (tty->stopped)
2682 return 0;
2683 return 32768; /* No limit, really; we're not buffering */
2684 }
2685
2686 static int con_chars_in_buffer(struct tty_struct *tty)
2687 {
2688 return 0; /* we're not buffering */
2689 }
2690
2691 /*
2692 * con_throttle and con_unthrottle are only used for
2693 * paste_selection(), which has to stuff in a large number of
2694 * characters...
2695 */
2696 static void con_throttle(struct tty_struct *tty)
2697 {
2698 }
2699
2700 static void con_unthrottle(struct tty_struct *tty)
2701 {
2702 struct vc_data *vc = tty->driver_data;
2703
2704 wake_up_interruptible(&vc->paste_wait);
2705 }
2706
2707 /*
2708 * Turn the Scroll-Lock LED on when the tty is stopped
2709 */
2710 static void con_stop(struct tty_struct *tty)
2711 {
2712 int console_num;
2713 if (!tty)
2714 return;
2715 console_num = tty->index;
2716 if (!vc_cons_allocated(console_num))
2717 return;
2718 set_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2719 set_leds();
2720 }
2721
2722 /*
2723 * Turn the Scroll-Lock LED off when the console is started
2724 */
2725 static void con_start(struct tty_struct *tty)
2726 {
2727 int console_num;
2728 if (!tty)
2729 return;
2730 console_num = tty->index;
2731 if (!vc_cons_allocated(console_num))
2732 return;
2733 clr_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2734 set_leds();
2735 }
2736
2737 static void con_flush_chars(struct tty_struct *tty)
2738 {
2739 struct vc_data *vc;
2740
2741 if (in_interrupt()) /* from flush_to_ldisc */
2742 return;
2743
2744 /* if we race with con_close(), vt may be null */
2745 acquire_console_sem();
2746 vc = tty->driver_data;
2747 if (vc)
2748 set_cursor(vc);
2749 release_console_sem();
2750 }
2751
2752 /*
2753 * Allocate the console screen memory.
2754 */
2755 static int con_open(struct tty_struct *tty, struct file *filp)
2756 {
2757 unsigned int currcons = tty->index;
2758 int ret = 0;
2759
2760 acquire_console_sem();
2761 if (tty->driver_data == NULL) {
2762 ret = vc_allocate(currcons);
2763 if (ret == 0) {
2764 struct vc_data *vc = vc_cons[currcons].d;
2765
2766 /* Still being freed */
2767 if (vc->vc_tty) {
2768 release_console_sem();
2769 return -ERESTARTSYS;
2770 }
2771 tty->driver_data = vc;
2772 vc->vc_tty = tty;
2773
2774 if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
2775 tty->winsize.ws_row = vc_cons[currcons].d->vc_rows;
2776 tty->winsize.ws_col = vc_cons[currcons].d->vc_cols;
2777 }
2778 if (vc->vc_utf)
2779 tty->termios->c_iflag |= IUTF8;
2780 else
2781 tty->termios->c_iflag &= ~IUTF8;
2782 release_console_sem();
2783 return ret;
2784 }
2785 }
2786 release_console_sem();
2787 return ret;
2788 }
2789
2790 static void con_close(struct tty_struct *tty, struct file *filp)
2791 {
2792 /* Nothing to do - we defer to shutdown */
2793 }
2794
2795 static void con_shutdown(struct tty_struct *tty)
2796 {
2797 struct vc_data *vc = tty->driver_data;
2798 BUG_ON(vc == NULL);
2799 acquire_console_sem();
2800 vc->vc_tty = NULL;
2801 release_console_sem();
2802 tty_shutdown(tty);
2803 }
2804
2805 static int default_italic_color = 2; // green (ASCII)
2806 static int default_underline_color = 3; // cyan (ASCII)
2807 module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR);
2808 module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR);
2809
2810 static void vc_init(struct vc_data *vc, unsigned int rows,
2811 unsigned int cols, int do_clear)
2812 {
2813 int j, k ;
2814
2815 vc->vc_cols = cols;
2816 vc->vc_rows = rows;
2817 vc->vc_size_row = cols << 1;
2818 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
2819
2820 set_origin(vc);
2821 vc->vc_pos = vc->vc_origin;
2822 reset_vc(vc);
2823 for (j=k=0; j<16; j++) {
2824 vc->vc_palette[k++] = default_red[j] ;
2825 vc->vc_palette[k++] = default_grn[j] ;
2826 vc->vc_palette[k++] = default_blu[j] ;
2827 }
2828 vc->vc_def_color = 0x07; /* white */
2829 vc->vc_ulcolor = default_underline_color;
2830 vc->vc_itcolor = default_italic_color;
2831 vc->vc_halfcolor = 0x08; /* grey */
2832 init_waitqueue_head(&vc->paste_wait);
2833 reset_terminal(vc, do_clear);
2834 }
2835
2836 /*
2837 * This routine initializes console interrupts, and does nothing
2838 * else. If you want the screen to clear, call tty_write with
2839 * the appropriate escape-sequence.
2840 */
2841
2842 static int __init con_init(void)
2843 {
2844 const char *display_desc = NULL;
2845 struct vc_data *vc;
2846 unsigned int currcons = 0, i;
2847
2848 acquire_console_sem();
2849
2850 if (conswitchp)
2851 display_desc = conswitchp->con_startup();
2852 if (!display_desc) {
2853 fg_console = 0;
2854 release_console_sem();
2855 return 0;
2856 }
2857
2858 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2859 struct con_driver *con_driver = &registered_con_driver[i];
2860
2861 if (con_driver->con == NULL) {
2862 con_driver->con = conswitchp;
2863 con_driver->desc = display_desc;
2864 con_driver->flag = CON_DRIVER_FLAG_INIT;
2865 con_driver->first = 0;
2866 con_driver->last = MAX_NR_CONSOLES - 1;
2867 break;
2868 }
2869 }
2870
2871 for (i = 0; i < MAX_NR_CONSOLES; i++)
2872 con_driver_map[i] = conswitchp;
2873
2874 if (blankinterval) {
2875 blank_state = blank_normal_wait;
2876 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
2877 }
2878
2879 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) {
2880 vc_cons[currcons].d = vc = kzalloc(sizeof(struct vc_data), GFP_NOWAIT);
2881 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
2882 visual_init(vc, currcons, 1);
2883 vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_NOWAIT);
2884 vc->vc_kmalloced = 0;
2885 vc_init(vc, vc->vc_rows, vc->vc_cols,
2886 currcons || !vc->vc_sw->con_save_screen);
2887 }
2888 currcons = fg_console = 0;
2889 master_display_fg = vc = vc_cons[currcons].d;
2890 set_origin(vc);
2891 save_screen(vc);
2892 gotoxy(vc, vc->vc_x, vc->vc_y);
2893 csi_J(vc, 0);
2894 update_screen(vc);
2895 printk("Console: %s %s %dx%d",
2896 vc->vc_can_do_color ? "colour" : "mono",
2897 display_desc, vc->vc_cols, vc->vc_rows);
2898 printable = 1;
2899 printk("\n");
2900
2901 release_console_sem();
2902
2903 #ifdef CONFIG_VT_CONSOLE
2904 register_console(&vt_console_driver);
2905 #endif
2906 return 0;
2907 }
2908 console_initcall(con_init);
2909
2910 static const struct tty_operations con_ops = {
2911 .open = con_open,
2912 .close = con_close,
2913 .write = con_write,
2914 .write_room = con_write_room,
2915 .put_char = con_put_char,
2916 .flush_chars = con_flush_chars,
2917 .chars_in_buffer = con_chars_in_buffer,
2918 .ioctl = vt_ioctl,
2919 .stop = con_stop,
2920 .start = con_start,
2921 .throttle = con_throttle,
2922 .unthrottle = con_unthrottle,
2923 .resize = vt_resize,
2924 .shutdown = con_shutdown
2925 };
2926
2927 static struct cdev vc0_cdev;
2928
2929 int __init vty_init(const struct file_operations *console_fops)
2930 {
2931 cdev_init(&vc0_cdev, console_fops);
2932 if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) ||
2933 register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0)
2934 panic("Couldn't register /dev/tty0 driver\n");
2935 device_create(tty_class, NULL, MKDEV(TTY_MAJOR, 0), NULL, "tty0");
2936
2937 vcs_init();
2938
2939 console_driver = alloc_tty_driver(MAX_NR_CONSOLES);
2940 if (!console_driver)
2941 panic("Couldn't allocate console driver\n");
2942 console_driver->owner = THIS_MODULE;
2943 console_driver->name = "tty";
2944 console_driver->name_base = 1;
2945 console_driver->major = TTY_MAJOR;
2946 console_driver->minor_start = 1;
2947 console_driver->type = TTY_DRIVER_TYPE_CONSOLE;
2948 console_driver->init_termios = tty_std_termios;
2949 if (default_utf8)
2950 console_driver->init_termios.c_iflag |= IUTF8;
2951 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS;
2952 tty_set_operations(console_driver, &con_ops);
2953 if (tty_register_driver(console_driver))
2954 panic("Couldn't register console driver\n");
2955 kbd_init();
2956 console_map_init();
2957 #ifdef CONFIG_PROM_CONSOLE
2958 prom_con_init();
2959 #endif
2960 #ifdef CONFIG_MDA_CONSOLE
2961 mda_console_init();
2962 #endif
2963 return 0;
2964 }
2965
2966 #ifndef VT_SINGLE_DRIVER
2967 #include <linux/device.h>
2968
2969 static struct class *vtconsole_class;
2970
2971 static int bind_con_driver(const struct consw *csw, int first, int last,
2972 int deflt)
2973 {
2974 struct module *owner = csw->owner;
2975 const char *desc = NULL;
2976 struct con_driver *con_driver;
2977 int i, j = -1, k = -1, retval = -ENODEV;
2978
2979 if (!try_module_get(owner))
2980 return -ENODEV;
2981
2982 acquire_console_sem();
2983
2984 /* check if driver is registered */
2985 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2986 con_driver = &registered_con_driver[i];
2987
2988 if (con_driver->con == csw) {
2989 desc = con_driver->desc;
2990 retval = 0;
2991 break;
2992 }
2993 }
2994
2995 if (retval)
2996 goto err;
2997
2998 if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) {
2999 csw->con_startup();
3000 con_driver->flag |= CON_DRIVER_FLAG_INIT;
3001 }
3002
3003 if (deflt) {
3004 if (conswitchp)
3005 module_put(conswitchp->owner);
3006
3007 __module_get(owner);
3008 conswitchp = csw;
3009 }
3010
3011 first = max(first, con_driver->first);
3012 last = min(last, con_driver->last);
3013
3014 for (i = first; i <= last; i++) {
3015 int old_was_color;
3016 struct vc_data *vc = vc_cons[i].d;
3017
3018 if (con_driver_map[i])
3019 module_put(con_driver_map[i]->owner);
3020 __module_get(owner);
3021 con_driver_map[i] = csw;
3022
3023 if (!vc || !vc->vc_sw)
3024 continue;
3025
3026 j = i;
3027
3028 if (CON_IS_VISIBLE(vc)) {
3029 k = i;
3030 save_screen(vc);
3031 }
3032
3033 old_was_color = vc->vc_can_do_color;
3034 vc->vc_sw->con_deinit(vc);
3035 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
3036 visual_init(vc, i, 0);
3037 set_origin(vc);
3038 update_attr(vc);
3039
3040 /* If the console changed between mono <-> color, then
3041 * the attributes in the screenbuf will be wrong. The
3042 * following resets all attributes to something sane.
3043 */
3044 if (old_was_color != vc->vc_can_do_color)
3045 clear_buffer_attributes(vc);
3046 }
3047
3048 printk("Console: switching ");
3049 if (!deflt)
3050 printk("consoles %d-%d ", first+1, last+1);
3051 if (j >= 0) {
3052 struct vc_data *vc = vc_cons[j].d;
3053
3054 printk("to %s %s %dx%d\n",
3055 vc->vc_can_do_color ? "colour" : "mono",
3056 desc, vc->vc_cols, vc->vc_rows);
3057
3058 if (k >= 0) {
3059 vc = vc_cons[k].d;
3060 update_screen(vc);
3061 }
3062 } else
3063 printk("to %s\n", desc);
3064
3065 retval = 0;
3066 err:
3067 release_console_sem();
3068 module_put(owner);
3069 return retval;
3070 };
3071
3072 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
3073 static int con_is_graphics(const struct consw *csw, int first, int last)
3074 {
3075 int i, retval = 0;
3076
3077 for (i = first; i <= last; i++) {
3078 struct vc_data *vc = vc_cons[i].d;
3079
3080 if (vc && vc->vc_mode == KD_GRAPHICS) {
3081 retval = 1;
3082 break;
3083 }
3084 }
3085
3086 return retval;
3087 }
3088
3089 /**
3090 * unbind_con_driver - unbind a console driver
3091 * @csw: pointer to console driver to unregister
3092 * @first: first in range of consoles that @csw should be unbound from
3093 * @last: last in range of consoles that @csw should be unbound from
3094 * @deflt: should next bound console driver be default after @csw is unbound?
3095 *
3096 * To unbind a driver from all possible consoles, pass 0 as @first and
3097 * %MAX_NR_CONSOLES as @last.
3098 *
3099 * @deflt controls whether the console that ends up replacing @csw should be
3100 * the default console.
3101 *
3102 * RETURNS:
3103 * -ENODEV if @csw isn't a registered console driver or can't be unregistered
3104 * or 0 on success.
3105 */
3106 int unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
3107 {
3108 struct module *owner = csw->owner;
3109 const struct consw *defcsw = NULL;
3110 struct con_driver *con_driver = NULL, *con_back = NULL;
3111 int i, retval = -ENODEV;
3112
3113 if (!try_module_get(owner))
3114 return -ENODEV;
3115
3116 acquire_console_sem();
3117
3118 /* check if driver is registered and if it is unbindable */
3119 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3120 con_driver = &registered_con_driver[i];
3121
3122 if (con_driver->con == csw &&
3123 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3124 retval = 0;
3125 break;
3126 }
3127 }
3128
3129 if (retval) {
3130 release_console_sem();
3131 goto err;
3132 }
3133
3134 retval = -ENODEV;
3135
3136 /* check if backup driver exists */
3137 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3138 con_back = &registered_con_driver[i];
3139
3140 if (con_back->con &&
3141 !(con_back->flag & CON_DRIVER_FLAG_MODULE)) {
3142 defcsw = con_back->con;
3143 retval = 0;
3144 break;
3145 }
3146 }
3147
3148 if (retval) {
3149 release_console_sem();
3150 goto err;
3151 }
3152
3153 if (!con_is_bound(csw)) {
3154 release_console_sem();
3155 goto err;
3156 }
3157
3158 first = max(first, con_driver->first);
3159 last = min(last, con_driver->last);
3160
3161 for (i = first; i <= last; i++) {
3162 if (con_driver_map[i] == csw) {
3163 module_put(csw->owner);
3164 con_driver_map[i] = NULL;
3165 }
3166 }
3167
3168 if (!con_is_bound(defcsw)) {
3169 const struct consw *defconsw = conswitchp;
3170
3171 defcsw->con_startup();
3172 con_back->flag |= CON_DRIVER_FLAG_INIT;
3173 /*
3174 * vgacon may change the default driver to point
3175 * to dummycon, we restore it here...
3176 */
3177 conswitchp = defconsw;
3178 }
3179
3180 if (!con_is_bound(csw))
3181 con_driver->flag &= ~CON_DRIVER_FLAG_INIT;
3182
3183 release_console_sem();
3184 /* ignore return value, binding should not fail */
3185 bind_con_driver(defcsw, first, last, deflt);
3186 err:
3187 module_put(owner);
3188 return retval;
3189
3190 }
3191 EXPORT_SYMBOL(unbind_con_driver);
3192
3193 static int vt_bind(struct con_driver *con)
3194 {
3195 const struct consw *defcsw = NULL, *csw = NULL;
3196 int i, more = 1, first = -1, last = -1, deflt = 0;
3197
3198 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3199 con_is_graphics(con->con, con->first, con->last))
3200 goto err;
3201
3202 csw = con->con;
3203
3204 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3205 struct con_driver *con = &registered_con_driver[i];
3206
3207 if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) {
3208 defcsw = con->con;
3209 break;
3210 }
3211 }
3212
3213 if (!defcsw)
3214 goto err;
3215
3216 while (more) {
3217 more = 0;
3218
3219 for (i = con->first; i <= con->last; i++) {
3220 if (con_driver_map[i] == defcsw) {
3221 if (first == -1)
3222 first = i;
3223 last = i;
3224 more = 1;
3225 } else if (first != -1)
3226 break;
3227 }
3228
3229 if (first == 0 && last == MAX_NR_CONSOLES -1)
3230 deflt = 1;
3231
3232 if (first != -1)
3233 bind_con_driver(csw, first, last, deflt);
3234
3235 first = -1;
3236 last = -1;
3237 deflt = 0;
3238 }
3239
3240 err:
3241 return 0;
3242 }
3243
3244 static int vt_unbind(struct con_driver *con)
3245 {
3246 const struct consw *csw = NULL;
3247 int i, more = 1, first = -1, last = -1, deflt = 0;
3248
3249 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3250 con_is_graphics(con->con, con->first, con->last))
3251 goto err;
3252
3253 csw = con->con;
3254
3255 while (more) {
3256 more = 0;
3257
3258 for (i = con->first; i <= con->last; i++) {
3259 if (con_driver_map[i] == csw) {
3260 if (first == -1)
3261 first = i;
3262 last = i;
3263 more = 1;
3264 } else if (first != -1)
3265 break;
3266 }
3267
3268 if (first == 0 && last == MAX_NR_CONSOLES -1)
3269 deflt = 1;
3270
3271 if (first != -1)
3272 unbind_con_driver(csw, first, last, deflt);
3273
3274 first = -1;
3275 last = -1;
3276 deflt = 0;
3277 }
3278
3279 err:
3280 return 0;
3281 }
3282 #else
3283 static inline int vt_bind(struct con_driver *con)
3284 {
3285 return 0;
3286 }
3287 static inline int vt_unbind(struct con_driver *con)
3288 {
3289 return 0;
3290 }
3291 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3292
3293 static ssize_t store_bind(struct device *dev, struct device_attribute *attr,
3294 const char *buf, size_t count)
3295 {
3296 struct con_driver *con = dev_get_drvdata(dev);
3297 int bind = simple_strtoul(buf, NULL, 0);
3298
3299 if (bind)
3300 vt_bind(con);
3301 else
3302 vt_unbind(con);
3303
3304 return count;
3305 }
3306
3307 static ssize_t show_bind(struct device *dev, struct device_attribute *attr,
3308 char *buf)
3309 {
3310 struct con_driver *con = dev_get_drvdata(dev);
3311 int bind = con_is_bound(con->con);
3312
3313 return snprintf(buf, PAGE_SIZE, "%i\n", bind);
3314 }
3315
3316 static ssize_t show_name(struct device *dev, struct device_attribute *attr,
3317 char *buf)
3318 {
3319 struct con_driver *con = dev_get_drvdata(dev);
3320
3321 return snprintf(buf, PAGE_SIZE, "%s %s\n",
3322 (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)",
3323 con->desc);
3324
3325 }
3326
3327 static struct device_attribute device_attrs[] = {
3328 __ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind),
3329 __ATTR(name, S_IRUGO, show_name, NULL),
3330 };
3331
3332 static int vtconsole_init_device(struct con_driver *con)
3333 {
3334 int i;
3335 int error = 0;
3336
3337 con->flag |= CON_DRIVER_FLAG_ATTR;
3338 dev_set_drvdata(con->dev, con);
3339 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3340 error = device_create_file(con->dev, &device_attrs[i]);
3341 if (error)
3342 break;
3343 }
3344
3345 if (error) {
3346 while (--i >= 0)
3347 device_remove_file(con->dev, &device_attrs[i]);
3348 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3349 }
3350
3351 return error;
3352 }
3353
3354 static void vtconsole_deinit_device(struct con_driver *con)
3355 {
3356 int i;
3357
3358 if (con->flag & CON_DRIVER_FLAG_ATTR) {
3359 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3360 device_remove_file(con->dev, &device_attrs[i]);
3361 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3362 }
3363 }
3364
3365 /**
3366 * con_is_bound - checks if driver is bound to the console
3367 * @csw: console driver
3368 *
3369 * RETURNS: zero if unbound, nonzero if bound
3370 *
3371 * Drivers can call this and if zero, they should release
3372 * all resources allocated on con_startup()
3373 */
3374 int con_is_bound(const struct consw *csw)
3375 {
3376 int i, bound = 0;
3377
3378 for (i = 0; i < MAX_NR_CONSOLES; i++) {
3379 if (con_driver_map[i] == csw) {
3380 bound = 1;
3381 break;
3382 }
3383 }
3384
3385 return bound;
3386 }
3387 EXPORT_SYMBOL(con_is_bound);
3388
3389 /**
3390 * register_con_driver - register console driver to console layer
3391 * @csw: console driver
3392 * @first: the first console to take over, minimum value is 0
3393 * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1
3394 *
3395 * DESCRIPTION: This function registers a console driver which can later
3396 * bind to a range of consoles specified by @first and @last. It will
3397 * also initialize the console driver by calling con_startup().
3398 */
3399 int register_con_driver(const struct consw *csw, int first, int last)
3400 {
3401 struct module *owner = csw->owner;
3402 struct con_driver *con_driver;
3403 const char *desc;
3404 int i, retval = 0;
3405
3406 if (!try_module_get(owner))
3407 return -ENODEV;
3408
3409 acquire_console_sem();
3410
3411 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3412 con_driver = &registered_con_driver[i];
3413
3414 /* already registered */
3415 if (con_driver->con == csw)
3416 retval = -EINVAL;
3417 }
3418
3419 if (retval)
3420 goto err;
3421
3422 desc = csw->con_startup();
3423
3424 if (!desc)
3425 goto err;
3426
3427 retval = -EINVAL;
3428
3429 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3430 con_driver = &registered_con_driver[i];
3431
3432 if (con_driver->con == NULL) {
3433 con_driver->con = csw;
3434 con_driver->desc = desc;
3435 con_driver->node = i;
3436 con_driver->flag = CON_DRIVER_FLAG_MODULE |
3437 CON_DRIVER_FLAG_INIT;
3438 con_driver->first = first;
3439 con_driver->last = last;
3440 retval = 0;
3441 break;
3442 }
3443 }
3444
3445 if (retval)
3446 goto err;
3447
3448 con_driver->dev = device_create(vtconsole_class, NULL,
3449 MKDEV(0, con_driver->node),
3450 NULL, "vtcon%i",
3451 con_driver->node);
3452
3453 if (IS_ERR(con_driver->dev)) {
3454 printk(KERN_WARNING "Unable to create device for %s; "
3455 "errno = %ld\n", con_driver->desc,
3456 PTR_ERR(con_driver->dev));
3457 con_driver->dev = NULL;
3458 } else {
3459 vtconsole_init_device(con_driver);
3460 }
3461
3462 err:
3463 release_console_sem();
3464 module_put(owner);
3465 return retval;
3466 }
3467 EXPORT_SYMBOL(register_con_driver);
3468
3469 /**
3470 * unregister_con_driver - unregister console driver from console layer
3471 * @csw: console driver
3472 *
3473 * DESCRIPTION: All drivers that registers to the console layer must
3474 * call this function upon exit, or if the console driver is in a state
3475 * where it won't be able to handle console services, such as the
3476 * framebuffer console without loaded framebuffer drivers.
3477 *
3478 * The driver must unbind first prior to unregistration.
3479 */
3480 int unregister_con_driver(const struct consw *csw)
3481 {
3482 int i, retval = -ENODEV;
3483
3484 acquire_console_sem();
3485
3486 /* cannot unregister a bound driver */
3487 if (con_is_bound(csw))
3488 goto err;
3489
3490 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3491 struct con_driver *con_driver = &registered_con_driver[i];
3492
3493 if (con_driver->con == csw &&
3494 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3495 vtconsole_deinit_device(con_driver);
3496 device_destroy(vtconsole_class,
3497 MKDEV(0, con_driver->node));
3498 con_driver->con = NULL;
3499 con_driver->desc = NULL;
3500 con_driver->dev = NULL;
3501 con_driver->node = 0;
3502 con_driver->flag = 0;
3503 con_driver->first = 0;
3504 con_driver->last = 0;
3505 retval = 0;
3506 break;
3507 }
3508 }
3509 err:
3510 release_console_sem();
3511 return retval;
3512 }
3513 EXPORT_SYMBOL(unregister_con_driver);
3514
3515 /*
3516 * If we support more console drivers, this function is used
3517 * when a driver wants to take over some existing consoles
3518 * and become default driver for newly opened ones.
3519 *
3520 * take_over_console is basically a register followed by unbind
3521 */
3522 int take_over_console(const struct consw *csw, int first, int last, int deflt)
3523 {
3524 int err;
3525
3526 err = register_con_driver(csw, first, last);
3527
3528 if (!err)
3529 bind_con_driver(csw, first, last, deflt);
3530
3531 return err;
3532 }
3533
3534 /*
3535 * give_up_console is a wrapper to unregister_con_driver. It will only
3536 * work if driver is fully unbound.
3537 */
3538 void give_up_console(const struct consw *csw)
3539 {
3540 unregister_con_driver(csw);
3541 }
3542
3543 static int __init vtconsole_class_init(void)
3544 {
3545 int i;
3546
3547 vtconsole_class = class_create(THIS_MODULE, "vtconsole");
3548 if (IS_ERR(vtconsole_class)) {
3549 printk(KERN_WARNING "Unable to create vt console class; "
3550 "errno = %ld\n", PTR_ERR(vtconsole_class));
3551 vtconsole_class = NULL;
3552 }
3553
3554 /* Add system drivers to sysfs */
3555 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3556 struct con_driver *con = &registered_con_driver[i];
3557
3558 if (con->con && !con->dev) {
3559 con->dev = device_create(vtconsole_class, NULL,
3560 MKDEV(0, con->node),
3561 NULL, "vtcon%i",
3562 con->node);
3563
3564 if (IS_ERR(con->dev)) {
3565 printk(KERN_WARNING "Unable to create "
3566 "device for %s; errno = %ld\n",
3567 con->desc, PTR_ERR(con->dev));
3568 con->dev = NULL;
3569 } else {
3570 vtconsole_init_device(con);
3571 }
3572 }
3573 }
3574
3575 return 0;
3576 }
3577 postcore_initcall(vtconsole_class_init);
3578
3579 #endif
3580
3581 /*
3582 * Screen blanking
3583 */
3584
3585 static int set_vesa_blanking(char __user *p)
3586 {
3587 unsigned int mode;
3588
3589 if (get_user(mode, p + 1))
3590 return -EFAULT;
3591
3592 vesa_blank_mode = (mode < 4) ? mode : 0;
3593 return 0;
3594 }
3595
3596 void do_blank_screen(int entering_gfx)
3597 {
3598 struct vc_data *vc = vc_cons[fg_console].d;
3599 int i;
3600
3601 WARN_CONSOLE_UNLOCKED();
3602
3603 if (console_blanked) {
3604 if (blank_state == blank_vesa_wait) {
3605 blank_state = blank_off;
3606 vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0);
3607 }
3608 return;
3609 }
3610
3611 /* entering graphics mode? */
3612 if (entering_gfx) {
3613 hide_cursor(vc);
3614 save_screen(vc);
3615 vc->vc_sw->con_blank(vc, -1, 1);
3616 console_blanked = fg_console + 1;
3617 blank_state = blank_off;
3618 set_origin(vc);
3619 return;
3620 }
3621
3622 if (blank_state != blank_normal_wait)
3623 return;
3624 blank_state = blank_off;
3625
3626 /* don't blank graphics */
3627 if (vc->vc_mode != KD_TEXT) {
3628 console_blanked = fg_console + 1;
3629 return;
3630 }
3631
3632 hide_cursor(vc);
3633 del_timer_sync(&console_timer);
3634 blank_timer_expired = 0;
3635
3636 save_screen(vc);
3637 /* In case we need to reset origin, blanking hook returns 1 */
3638 i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0);
3639 console_blanked = fg_console + 1;
3640 if (i)
3641 set_origin(vc);
3642
3643 if (console_blank_hook && console_blank_hook(1))
3644 return;
3645
3646 if (vesa_off_interval && vesa_blank_mode) {
3647 blank_state = blank_vesa_wait;
3648 mod_timer(&console_timer, jiffies + vesa_off_interval);
3649 }
3650 }
3651 EXPORT_SYMBOL(do_blank_screen);
3652
3653 /*
3654 * Called by timer as well as from vt_console_driver
3655 */
3656 void do_unblank_screen(int leaving_gfx)
3657 {
3658 struct vc_data *vc;
3659
3660 /* This should now always be called from a "sane" (read: can schedule)
3661 * context for the sake of the low level drivers, except in the special
3662 * case of oops_in_progress
3663 */
3664 if (!oops_in_progress)
3665 might_sleep();
3666
3667 WARN_CONSOLE_UNLOCKED();
3668
3669 ignore_poke = 0;
3670 if (!console_blanked)
3671 return;
3672 if (!vc_cons_allocated(fg_console)) {
3673 /* impossible */
3674 printk("unblank_screen: tty %d not allocated ??\n", fg_console+1);
3675 return;
3676 }
3677 vc = vc_cons[fg_console].d;
3678 if (vc->vc_mode != KD_TEXT)
3679 return; /* but leave console_blanked != 0 */
3680
3681 if (blankinterval) {
3682 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
3683 blank_state = blank_normal_wait;
3684 }
3685
3686 console_blanked = 0;
3687 if (vc->vc_sw->con_blank(vc, 0, leaving_gfx))
3688 /* Low-level driver cannot restore -> do it ourselves */
3689 update_screen(vc);
3690 if (console_blank_hook)
3691 console_blank_hook(0);
3692 set_palette(vc);
3693 set_cursor(vc);
3694 }
3695 EXPORT_SYMBOL(do_unblank_screen);
3696
3697 /*
3698 * This is called by the outside world to cause a forced unblank, mostly for
3699 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
3700 * call it with 1 as an argument and so force a mode restore... that may kill
3701 * X or at least garbage the screen but would also make the Oops visible...
3702 */
3703 void unblank_screen(void)
3704 {
3705 do_unblank_screen(0);
3706 }
3707
3708 /*
3709 * We defer the timer blanking to work queue so it can take the console mutex
3710 * (console operations can still happen at irq time, but only from printk which
3711 * has the console mutex. Not perfect yet, but better than no locking
3712 */
3713 static void blank_screen_t(unsigned long dummy)
3714 {
3715 if (unlikely(!keventd_up())) {
3716 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
3717 return;
3718 }
3719 blank_timer_expired = 1;
3720 schedule_work(&console_work);
3721 }
3722
3723 void poke_blanked_console(void)
3724 {
3725 WARN_CONSOLE_UNLOCKED();
3726
3727 /* Add this so we quickly catch whoever might call us in a non
3728 * safe context. Nowadays, unblank_screen() isn't to be called in
3729 * atomic contexts and is allowed to schedule (with the special case
3730 * of oops_in_progress, but that isn't of any concern for this
3731 * function. --BenH.
3732 */
3733 might_sleep();
3734
3735 /* This isn't perfectly race free, but a race here would be mostly harmless,
3736 * at worse, we'll do a spurrious blank and it's unlikely
3737 */
3738 del_timer(&console_timer);
3739 blank_timer_expired = 0;
3740
3741 if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS)
3742 return;
3743 if (console_blanked)
3744 unblank_screen();
3745 else if (blankinterval) {
3746 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
3747 blank_state = blank_normal_wait;
3748 }
3749 }
3750
3751 /*
3752 * Palettes
3753 */
3754
3755 static void set_palette(struct vc_data *vc)
3756 {
3757 WARN_CONSOLE_UNLOCKED();
3758
3759 if (vc->vc_mode != KD_GRAPHICS)
3760 vc->vc_sw->con_set_palette(vc, color_table);
3761 }
3762
3763 static int set_get_cmap(unsigned char __user *arg, int set)
3764 {
3765 int i, j, k;
3766
3767 WARN_CONSOLE_UNLOCKED();
3768
3769 for (i = 0; i < 16; i++)
3770 if (set) {
3771 get_user(default_red[i], arg++);
3772 get_user(default_grn[i], arg++);
3773 get_user(default_blu[i], arg++);
3774 } else {
3775 put_user(default_red[i], arg++);
3776 put_user(default_grn[i], arg++);
3777 put_user(default_blu[i], arg++);
3778 }
3779 if (set) {
3780 for (i = 0; i < MAX_NR_CONSOLES; i++)
3781 if (vc_cons_allocated(i)) {
3782 for (j = k = 0; j < 16; j++) {
3783 vc_cons[i].d->vc_palette[k++] = default_red[j];
3784 vc_cons[i].d->vc_palette[k++] = default_grn[j];
3785 vc_cons[i].d->vc_palette[k++] = default_blu[j];
3786 }
3787 set_palette(vc_cons[i].d);
3788 }
3789 }
3790 return 0;
3791 }
3792
3793 /*
3794 * Load palette into the DAC registers. arg points to a colour
3795 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
3796 */
3797
3798 int con_set_cmap(unsigned char __user *arg)
3799 {
3800 int rc;
3801
3802 acquire_console_sem();
3803 rc = set_get_cmap (arg,1);
3804 release_console_sem();
3805
3806 return rc;
3807 }
3808
3809 int con_get_cmap(unsigned char __user *arg)
3810 {
3811 int rc;
3812
3813 acquire_console_sem();
3814 rc = set_get_cmap (arg,0);
3815 release_console_sem();
3816
3817 return rc;
3818 }
3819
3820 void reset_palette(struct vc_data *vc)
3821 {
3822 int j, k;
3823 for (j=k=0; j<16; j++) {
3824 vc->vc_palette[k++] = default_red[j];
3825 vc->vc_palette[k++] = default_grn[j];
3826 vc->vc_palette[k++] = default_blu[j];
3827 }
3828 set_palette(vc);
3829 }
3830
3831 /*
3832 * Font switching
3833 *
3834 * Currently we only support fonts up to 32 pixels wide, at a maximum height
3835 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
3836 * depending on width) reserved for each character which is kinda wasty, but
3837 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
3838 * is upto the actual low-level console-driver convert data into its favorite
3839 * format (maybe we should add a `fontoffset' field to the `display'
3840 * structure so we won't have to convert the fontdata all the time.
3841 * /Jes
3842 */
3843
3844 #define max_font_size 65536
3845
3846 static int con_font_get(struct vc_data *vc, struct console_font_op *op)
3847 {
3848 struct console_font font;
3849 int rc = -EINVAL;
3850 int c;
3851
3852 if (vc->vc_mode != KD_TEXT)
3853 return -EINVAL;
3854
3855 if (op->data) {
3856 font.data = kmalloc(max_font_size, GFP_KERNEL);
3857 if (!font.data)
3858 return -ENOMEM;
3859 } else
3860 font.data = NULL;
3861
3862 acquire_console_sem();
3863 if (vc->vc_sw->con_font_get)
3864 rc = vc->vc_sw->con_font_get(vc, &font);
3865 else
3866 rc = -ENOSYS;
3867 release_console_sem();
3868
3869 if (rc)
3870 goto out;
3871
3872 c = (font.width+7)/8 * 32 * font.charcount;
3873
3874 if (op->data && font.charcount > op->charcount)
3875 rc = -ENOSPC;
3876 if (!(op->flags & KD_FONT_FLAG_OLD)) {
3877 if (font.width > op->width || font.height > op->height)
3878 rc = -ENOSPC;
3879 } else {
3880 if (font.width != 8)
3881 rc = -EIO;
3882 else if ((op->height && font.height > op->height) ||
3883 font.height > 32)
3884 rc = -ENOSPC;
3885 }
3886 if (rc)
3887 goto out;
3888
3889 op->height = font.height;
3890 op->width = font.width;
3891 op->charcount = font.charcount;
3892
3893 if (op->data && copy_to_user(op->data, font.data, c))
3894 rc = -EFAULT;
3895
3896 out:
3897 kfree(font.data);
3898 return rc;
3899 }
3900
3901 static int con_font_set(struct vc_data *vc, struct console_font_op *op)
3902 {
3903 struct console_font font;
3904 int rc = -EINVAL;
3905 int size;
3906
3907 if (vc->vc_mode != KD_TEXT)
3908 return -EINVAL;
3909 if (!op->data)
3910 return -EINVAL;
3911 if (op->charcount > 512)
3912 return -EINVAL;
3913 if (!op->height) { /* Need to guess font height [compat] */
3914 int h, i;
3915 u8 __user *charmap = op->data;
3916 u8 tmp;
3917
3918 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
3919 so that we can get rid of this soon */
3920 if (!(op->flags & KD_FONT_FLAG_OLD))
3921 return -EINVAL;
3922 for (h = 32; h > 0; h--)
3923 for (i = 0; i < op->charcount; i++) {
3924 if (get_user(tmp, &charmap[32*i+h-1]))
3925 return -EFAULT;
3926 if (tmp)
3927 goto nonzero;
3928 }
3929 return -EINVAL;
3930 nonzero:
3931 op->height = h;
3932 }
3933 if (op->width <= 0 || op->width > 32 || op->height > 32)
3934 return -EINVAL;
3935 size = (op->width+7)/8 * 32 * op->charcount;
3936 if (size > max_font_size)
3937 return -ENOSPC;
3938 font.charcount = op->charcount;
3939 font.height = op->height;
3940 font.width = op->width;
3941 font.data = kmalloc(size, GFP_KERNEL);
3942 if (!font.data)
3943 return -ENOMEM;
3944 if (copy_from_user(font.data, op->data, size)) {
3945 kfree(font.data);
3946 return -EFAULT;
3947 }
3948 acquire_console_sem();
3949 if (vc->vc_sw->con_font_set)
3950 rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
3951 else
3952 rc = -ENOSYS;
3953 release_console_sem();
3954 kfree(font.data);
3955 return rc;
3956 }
3957
3958 static int con_font_default(struct vc_data *vc, struct console_font_op *op)
3959 {
3960 struct console_font font = {.width = op->width, .height = op->height};
3961 char name[MAX_FONT_NAME];
3962 char *s = name;
3963 int rc;
3964
3965 if (vc->vc_mode != KD_TEXT)
3966 return -EINVAL;
3967
3968 if (!op->data)
3969 s = NULL;
3970 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0)
3971 return -EFAULT;
3972 else
3973 name[MAX_FONT_NAME - 1] = 0;
3974
3975 acquire_console_sem();
3976 if (vc->vc_sw->con_font_default)
3977 rc = vc->vc_sw->con_font_default(vc, &font, s);
3978 else
3979 rc = -ENOSYS;
3980 release_console_sem();
3981 if (!rc) {
3982 op->width = font.width;
3983 op->height = font.height;
3984 }
3985 return rc;
3986 }
3987
3988 static int con_font_copy(struct vc_data *vc, struct console_font_op *op)
3989 {
3990 int con = op->height;
3991 int rc;
3992
3993 if (vc->vc_mode != KD_TEXT)
3994 return -EINVAL;
3995
3996 acquire_console_sem();
3997 if (!vc->vc_sw->con_font_copy)
3998 rc = -ENOSYS;
3999 else if (con < 0 || !vc_cons_allocated(con))
4000 rc = -ENOTTY;
4001 else if (con == vc->vc_num) /* nothing to do */
4002 rc = 0;
4003 else
4004 rc = vc->vc_sw->con_font_copy(vc, con);
4005 release_console_sem();
4006 return rc;
4007 }
4008
4009 int con_font_op(struct vc_data *vc, struct console_font_op *op)
4010 {
4011 switch (op->op) {
4012 case KD_FONT_OP_SET:
4013 return con_font_set(vc, op);
4014 case KD_FONT_OP_GET:
4015 return con_font_get(vc, op);
4016 case KD_FONT_OP_SET_DEFAULT:
4017 return con_font_default(vc, op);
4018 case KD_FONT_OP_COPY:
4019 return con_font_copy(vc, op);
4020 }
4021 return -ENOSYS;
4022 }
4023
4024 /*
4025 * Interface exported to selection and vcs.
4026 */
4027
4028 /* used by selection */
4029 u16 screen_glyph(struct vc_data *vc, int offset)
4030 {
4031 u16 w = scr_readw(screenpos(vc, offset, 1));
4032 u16 c = w & 0xff;
4033
4034 if (w & vc->vc_hi_font_mask)
4035 c |= 0x100;
4036 return c;
4037 }
4038 EXPORT_SYMBOL_GPL(screen_glyph);
4039
4040 /* used by vcs - note the word offset */
4041 unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed)
4042 {
4043 return screenpos(vc, 2 * w_offset, viewed);
4044 }
4045
4046 void getconsxy(struct vc_data *vc, unsigned char *p)
4047 {
4048 p[0] = vc->vc_x;
4049 p[1] = vc->vc_y;
4050 }
4051
4052 void putconsxy(struct vc_data *vc, unsigned char *p)
4053 {
4054 hide_cursor(vc);
4055 gotoxy(vc, p[0], p[1]);
4056 set_cursor(vc);
4057 }
4058
4059 u16 vcs_scr_readw(struct vc_data *vc, const u16 *org)
4060 {
4061 if ((unsigned long)org == vc->vc_pos && softcursor_original != -1)
4062 return softcursor_original;
4063 return scr_readw(org);
4064 }
4065
4066 void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org)
4067 {
4068 scr_writew(val, org);
4069 if ((unsigned long)org == vc->vc_pos) {
4070 softcursor_original = -1;
4071 add_softcursor(vc);
4072 }
4073 }
4074
4075 /*
4076 * Visible symbols for modules
4077 */
4078
4079 EXPORT_SYMBOL(color_table);
4080 EXPORT_SYMBOL(default_red);
4081 EXPORT_SYMBOL(default_grn);
4082 EXPORT_SYMBOL(default_blu);
4083 EXPORT_SYMBOL(update_region);
4084 EXPORT_SYMBOL(redraw_screen);
4085 EXPORT_SYMBOL(vc_resize);
4086 EXPORT_SYMBOL(fg_console);
4087 EXPORT_SYMBOL(console_blank_hook);
4088 EXPORT_SYMBOL(console_blanked);
4089 EXPORT_SYMBOL(vc_cons);
4090 #ifndef VT_SINGLE_DRIVER
4091 EXPORT_SYMBOL(take_over_console);
4092 EXPORT_SYMBOL(give_up_console);
4093 #endif
kernel source for telekom puls (alcatel/mediatek)