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HID: convert to dev_* prints
[linux-2.6/next.git] / drivers / char / vt.c
blob57029fefd64a65fec4bfbb0e69a1915e8aa4359a
1 /*
2 * linux/drivers/char/vt.c
3 *
4 * Copyright (C) 1991, 1992 Linus Torvalds
5 */
6
7 /*
8 * Hopefully this will be a rather complete VT102 implementation.
9 *
10 * Beeping thanks to John T Kohl.
11 *
12 * Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics
13 * Chars, and VT100 enhancements by Peter MacDonald.
14 *
15 * Copy and paste function by Andrew Haylett,
16 * some enhancements by Alessandro Rubini.
17 *
18 * Code to check for different video-cards mostly by Galen Hunt,
19 * <g-hunt@ee.utah.edu>
20 *
21 * Rudimentary ISO 10646/Unicode/UTF-8 character set support by
22 * Markus Kuhn, <mskuhn@immd4.informatik.uni-erlangen.de>.
23 *
24 * Dynamic allocation of consoles, aeb@cwi.nl, May 1994
25 * Resizing of consoles, aeb, 940926
26 *
27 * Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94
28 * <poe@daimi.aau.dk>
29 *
30 * User-defined bell sound, new setterm control sequences and printk
31 * redirection by Martin Mares <mj@k332.feld.cvut.cz> 19-Nov-95
32 *
33 * APM screenblank bug fixed Takashi Manabe <manabe@roy.dsl.tutics.tut.jp>
34 *
35 * Merge with the abstract console driver by Geert Uytterhoeven
36 * <geert@linux-m68k.org>, Jan 1997.
37 *
38 * Original m68k console driver modifications by
39 *
40 * - Arno Griffioen <arno@usn.nl>
41 * - David Carter <carter@cs.bris.ac.uk>
42 *
43 * The abstract console driver provides a generic interface for a text
44 * console. It supports VGA text mode, frame buffer based graphical consoles
45 * and special graphics processors that are only accessible through some
46 * registers (e.g. a TMS340x0 GSP).
47 *
48 * The interface to the hardware is specified using a special structure
49 * (struct consw) which contains function pointers to console operations
50 * (see <linux/console.h> for more information).
51 *
52 * Support for changeable cursor shape
53 * by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997
54 *
55 * Ported to i386 and con_scrolldelta fixed
56 * by Emmanuel Marty <core@ggi-project.org>, April 1998
57 *
58 * Resurrected character buffers in videoram plus lots of other trickery
59 * by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998
60 *
61 * Removed old-style timers, introduced console_timer, made timer
62 * deletion SMP-safe. 17Jun00, Andrew Morton <andrewm@uow.edu.au>
63 *
64 * Removed console_lock, enabled interrupts across all console operations
65 * 13 March 2001, Andrew Morton
66 *
67 * Fixed UTF-8 mode so alternate charset modes always work according
68 * to control sequences interpreted in do_con_trol function
69 * preserving backward VT100 semigraphics compatibility,
70 * malformed UTF sequences represented as sequences of replacement glyphs,
71 * original codes or '?' as a last resort if replacement glyph is undefined
72 * by Adam Tla/lka <atlka@pg.gda.pl>, Aug 2006
73 */
74
75 #include <linux/module.h>
76 #include <linux/types.h>
77 #include <linux/sched.h>
78 #include <linux/tty.h>
79 #include <linux/tty_flip.h>
80 #include <linux/kernel.h>
81 #include <linux/string.h>
82 #include <linux/errno.h>
83 #include <linux/kd.h>
84 #include <linux/slab.h>
85 #include <linux/major.h>
86 #include <linux/mm.h>
87 #include <linux/console.h>
88 #include <linux/init.h>
89 #include <linux/mutex.h>
90 #include <linux/vt_kern.h>
91 #include <linux/selection.h>
92 #include <linux/tiocl.h>
93 #include <linux/kbd_kern.h>
94 #include <linux/consolemap.h>
95 #include <linux/timer.h>
96 #include <linux/interrupt.h>
97 #include <linux/workqueue.h>
98 #include <linux/bootmem.h>
99 #include <linux/pm.h>
100 #include <linux/font.h>
101 #include <linux/bitops.h>
102 #include <linux/notifier.h>
103 #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 blankinterval = 10*60*HZ;
176 static int vesa_off_interval;
177
178 static DECLARE_WORK(console_work, console_callback);
179
180 /*
181 * fg_console is the current virtual console,
182 * last_console is the last used one,
183 * want_console is the console we want to switch to,
184 * kmsg_redirect is the console for kernel messages,
185 */
186 int fg_console;
187 int last_console;
188 int want_console = -1;
189 int kmsg_redirect;
190
191 /*
192 * For each existing display, we have a pointer to console currently visible
193 * on that display, allowing consoles other than fg_console to be refreshed
194 * appropriately. Unless the low-level driver supplies its own display_fg
195 * variable, we use this one for the "master display".
196 */
197 static struct vc_data *master_display_fg;
198
199 /*
200 * Unfortunately, we need to delay tty echo when we're currently writing to the
201 * console since the code is (and always was) not re-entrant, so we schedule
202 * all flip requests to process context with schedule-task() and run it from
203 * console_callback().
204 */
205
206 /*
207 * For the same reason, we defer scrollback to the console callback.
208 */
209 static int scrollback_delta;
210
211 /*
212 * Hook so that the power management routines can (un)blank
213 * the console on our behalf.
214 */
215 int (*console_blank_hook)(int);
216
217 static DEFINE_TIMER(console_timer, blank_screen_t, 0, 0);
218 static int blank_state;
219 static int blank_timer_expired;
220 enum {
221 blank_off = 0,
222 blank_normal_wait,
223 blank_vesa_wait,
224 };
225
226 /*
227 * Notifier list for console events.
228 */
229 static ATOMIC_NOTIFIER_HEAD(vt_notifier_list);
230
231 int register_vt_notifier(struct notifier_block *nb)
232 {
233 return atomic_notifier_chain_register(&vt_notifier_list, nb);
234 }
235 EXPORT_SYMBOL_GPL(register_vt_notifier);
236
237 int unregister_vt_notifier(struct notifier_block *nb)
238 {
239 return atomic_notifier_chain_unregister(&vt_notifier_list, nb);
240 }
241 EXPORT_SYMBOL_GPL(unregister_vt_notifier);
242
243 static void notify_write(struct vc_data *vc, unsigned int unicode)
244 {
245 struct vt_notifier_param param = { .vc = vc, unicode = unicode };
246 atomic_notifier_call_chain(&vt_notifier_list, VT_WRITE, &param);
247 }
248
249 static void notify_update(struct vc_data *vc)
250 {
251 struct vt_notifier_param param = { .vc = vc };
252 atomic_notifier_call_chain(&vt_notifier_list, VT_UPDATE, &param);
253 }
254
255 /*
256 * Low-Level Functions
257 */
258
259 #define IS_FG(vc) ((vc)->vc_num == fg_console)
260
261 #ifdef VT_BUF_VRAM_ONLY
262 #define DO_UPDATE(vc) 0
263 #else
264 #define DO_UPDATE(vc) (CON_IS_VISIBLE(vc) && !console_blanked)
265 #endif
266
267 static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed)
268 {
269 unsigned short *p;
270
271 if (!viewed)
272 p = (unsigned short *)(vc->vc_origin + offset);
273 else if (!vc->vc_sw->con_screen_pos)
274 p = (unsigned short *)(vc->vc_visible_origin + offset);
275 else
276 p = vc->vc_sw->con_screen_pos(vc, offset);
277 return p;
278 }
279
280 static inline void scrolldelta(int lines)
281 {
282 scrollback_delta += lines;
283 schedule_console_callback();
284 }
285
286 void schedule_console_callback(void)
287 {
288 schedule_work(&console_work);
289 }
290
291 static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
292 {
293 unsigned short *d, *s;
294
295 if (t+nr >= b)
296 nr = b - t - 1;
297 if (b > vc->vc_rows || t >= b || nr < 1)
298 return;
299 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr))
300 return;
301 d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
302 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr));
303 scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row);
304 scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_scrl_erase_char,
305 vc->vc_size_row * nr);
306 }
307
308 static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
309 {
310 unsigned short *s;
311 unsigned int step;
312
313 if (t+nr >= b)
314 nr = b - t - 1;
315 if (b > vc->vc_rows || t >= b || nr < 1)
316 return;
317 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr))
318 return;
319 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
320 step = vc->vc_cols * nr;
321 scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row);
322 scr_memsetw(s, vc->vc_scrl_erase_char, 2 * step);
323 }
324
325 static void do_update_region(struct vc_data *vc, unsigned long start, int count)
326 {
327 #ifndef VT_BUF_VRAM_ONLY
328 unsigned int xx, yy, offset;
329 u16 *p;
330
331 p = (u16 *) start;
332 if (!vc->vc_sw->con_getxy) {
333 offset = (start - vc->vc_origin) / 2;
334 xx = offset % vc->vc_cols;
335 yy = offset / vc->vc_cols;
336 } else {
337 int nxx, nyy;
338 start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy);
339 xx = nxx; yy = nyy;
340 }
341 for(;;) {
342 u16 attrib = scr_readw(p) & 0xff00;
343 int startx = xx;
344 u16 *q = p;
345 while (xx < vc->vc_cols && count) {
346 if (attrib != (scr_readw(p) & 0xff00)) {
347 if (p > q)
348 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
349 startx = xx;
350 q = p;
351 attrib = scr_readw(p) & 0xff00;
352 }
353 p++;
354 xx++;
355 count--;
356 }
357 if (p > q)
358 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
359 if (!count)
360 break;
361 xx = 0;
362 yy++;
363 if (vc->vc_sw->con_getxy) {
364 p = (u16 *)start;
365 start = vc->vc_sw->con_getxy(vc, start, NULL, NULL);
366 }
367 }
368 #endif
369 }
370
371 void update_region(struct vc_data *vc, unsigned long start, int count)
372 {
373 WARN_CONSOLE_UNLOCKED();
374
375 if (DO_UPDATE(vc)) {
376 hide_cursor(vc);
377 do_update_region(vc, start, count);
378 set_cursor(vc);
379 }
380 }
381
382 /* Structure of attributes is hardware-dependent */
383
384 static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink,
385 u8 _underline, u8 _reverse, u8 _italic)
386 {
387 if (vc->vc_sw->con_build_attr)
388 return vc->vc_sw->con_build_attr(vc, _color, _intensity,
389 _blink, _underline, _reverse, _italic);
390
391 #ifndef VT_BUF_VRAM_ONLY
392 /*
393 * ++roman: I completely changed the attribute format for monochrome
394 * mode (!can_do_color). The formerly used MDA (monochrome display
395 * adapter) format didn't allow the combination of certain effects.
396 * Now the attribute is just a bit vector:
397 * Bit 0..1: intensity (0..2)
398 * Bit 2 : underline
399 * Bit 3 : reverse
400 * Bit 7 : blink
401 */
402 {
403 u8 a = _color;
404 if (!vc->vc_can_do_color)
405 return _intensity |
406 (_italic ? 2 : 0) |
407 (_underline ? 4 : 0) |
408 (_reverse ? 8 : 0) |
409 (_blink ? 0x80 : 0);
410 if (_italic)
411 a = (a & 0xF0) | vc->vc_itcolor;
412 else if (_underline)
413 a = (a & 0xf0) | vc->vc_ulcolor;
414 else if (_intensity == 0)
415 a = (a & 0xf0) | vc->vc_ulcolor;
416 if (_reverse)
417 a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77);
418 if (_blink)
419 a ^= 0x80;
420 if (_intensity == 2)
421 a ^= 0x08;
422 if (vc->vc_hi_font_mask == 0x100)
423 a <<= 1;
424 return a;
425 }
426 #else
427 return 0;
428 #endif
429 }
430
431 static void update_attr(struct vc_data *vc)
432 {
433 vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity,
434 vc->vc_blink, vc->vc_underline,
435 vc->vc_reverse ^ vc->vc_decscnm, vc->vc_italic);
436 vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm, 0) << 8) | ' ';
437 vc->vc_scrl_erase_char = (build_attr(vc, vc->vc_def_color, 1, false, false, vc->vc_decscnm, false) << 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 atomic_notifier_call_chain(&vt_notifier_list, VT_ALLOCATE, &param);
783 }
784 return 0;
785 }
786
787 static inline int resize_screen(struct vc_data *vc, int width, int height,
788 int user)
789 {
790 /* Resizes the resolution of the display adapater */
791 int err = 0;
792
793 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize)
794 err = vc->vc_sw->con_resize(vc, width, height, user);
795
796 return err;
797 }
798
799 /*
800 * Change # of rows and columns (0 means unchanged/the size of fg_console)
801 * [this is to be used together with some user program
802 * like resize that changes the hardware videomode]
803 */
804 #define VC_RESIZE_MAXCOL (32767)
805 #define VC_RESIZE_MAXROW (32767)
806
807 /**
808 * vc_do_resize - resizing method for the tty
809 * @tty: tty being resized
810 * @real_tty: real tty (different to tty if a pty/tty pair)
811 * @vc: virtual console private data
812 * @cols: columns
813 * @lines: lines
814 *
815 * Resize a virtual console, clipping according to the actual constraints.
816 * If the caller passes a tty structure then update the termios winsize
817 * information and perform any neccessary signal handling.
818 *
819 * Caller must hold the console semaphore. Takes the termios mutex and
820 * ctrl_lock of the tty IFF a tty is passed.
821 */
822
823 static int vc_do_resize(struct tty_struct *tty, struct tty_struct *real_tty,
824 struct vc_data *vc, unsigned int cols, unsigned int lines)
825 {
826 unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0;
827 unsigned int old_cols, old_rows, old_row_size, old_screen_size;
828 unsigned int new_cols, new_rows, new_row_size, new_screen_size;
829 unsigned int end, user;
830 unsigned short *newscreen;
831
832 WARN_CONSOLE_UNLOCKED();
833
834 if (!vc)
835 return -ENXIO;
836
837 user = vc->vc_resize_user;
838 vc->vc_resize_user = 0;
839
840 if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW)
841 return -EINVAL;
842
843 new_cols = (cols ? cols : vc->vc_cols);
844 new_rows = (lines ? lines : vc->vc_rows);
845 new_row_size = new_cols << 1;
846 new_screen_size = new_row_size * new_rows;
847
848 if (new_cols == vc->vc_cols && new_rows == vc->vc_rows)
849 return 0;
850
851 newscreen = kmalloc(new_screen_size, GFP_USER);
852 if (!newscreen)
853 return -ENOMEM;
854
855 old_rows = vc->vc_rows;
856 old_cols = vc->vc_cols;
857 old_row_size = vc->vc_size_row;
858 old_screen_size = vc->vc_screenbuf_size;
859
860 err = resize_screen(vc, new_cols, new_rows, user);
861 if (err) {
862 kfree(newscreen);
863 return err;
864 }
865
866 vc->vc_rows = new_rows;
867 vc->vc_cols = new_cols;
868 vc->vc_size_row = new_row_size;
869 vc->vc_screenbuf_size = new_screen_size;
870
871 rlth = min(old_row_size, new_row_size);
872 rrem = new_row_size - rlth;
873 old_origin = vc->vc_origin;
874 new_origin = (long) newscreen;
875 new_scr_end = new_origin + new_screen_size;
876
877 if (vc->vc_y > new_rows) {
878 if (old_rows - vc->vc_y < new_rows) {
879 /*
880 * Cursor near the bottom, copy contents from the
881 * bottom of buffer
882 */
883 old_origin += (old_rows - new_rows) * old_row_size;
884 end = vc->vc_scr_end;
885 } else {
886 /*
887 * Cursor is in no man's land, copy 1/2 screenful
888 * from the top and bottom of cursor position
889 */
890 old_origin += (vc->vc_y - new_rows/2) * old_row_size;
891 end = old_origin + (old_row_size * new_rows);
892 }
893 } else
894 /*
895 * Cursor near the top, copy contents from the top of buffer
896 */
897 end = (old_rows > new_rows) ? old_origin +
898 (old_row_size * new_rows) :
899 vc->vc_scr_end;
900
901 update_attr(vc);
902
903 while (old_origin < end) {
904 scr_memcpyw((unsigned short *) new_origin,
905 (unsigned short *) old_origin, rlth);
906 if (rrem)
907 scr_memsetw((void *)(new_origin + rlth),
908 vc->vc_video_erase_char, rrem);
909 old_origin += old_row_size;
910 new_origin += new_row_size;
911 }
912 if (new_scr_end > new_origin)
913 scr_memsetw((void *)new_origin, vc->vc_video_erase_char,
914 new_scr_end - new_origin);
915 if (vc->vc_kmalloced)
916 kfree(vc->vc_screenbuf);
917 vc->vc_screenbuf = newscreen;
918 vc->vc_kmalloced = 1;
919 vc->vc_screenbuf_size = new_screen_size;
920 set_origin(vc);
921
922 /* do part of a reset_terminal() */
923 vc->vc_top = 0;
924 vc->vc_bottom = vc->vc_rows;
925 gotoxy(vc, vc->vc_x, vc->vc_y);
926 save_cur(vc);
927
928 if (tty) {
929 /* Rewrite the requested winsize data with the actual
930 resulting sizes */
931 struct winsize ws;
932 memset(&ws, 0, sizeof(ws));
933 ws.ws_row = vc->vc_rows;
934 ws.ws_col = vc->vc_cols;
935 ws.ws_ypixel = vc->vc_scan_lines;
936 tty_do_resize(tty, real_tty, &ws);
937 }
938
939 if (CON_IS_VISIBLE(vc))
940 update_screen(vc);
941 return err;
942 }
943
944 /**
945 * vc_resize - resize a VT
946 * @vc: virtual console
947 * @cols: columns
948 * @rows: rows
949 *
950 * Resize a virtual console as seen from the console end of things. We
951 * use the common vc_do_resize methods to update the structures. The
952 * caller must hold the console sem to protect console internals and
953 * vc->vc_tty
954 */
955
956 int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int rows)
957 {
958 return vc_do_resize(vc->vc_tty, vc->vc_tty, vc, cols, rows);
959 }
960
961 /**
962 * vt_resize - resize a VT
963 * @tty: tty to resize
964 * @real_tty: tty if a pty/tty pair
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
975 int vt_resize(struct tty_struct *tty, struct tty_struct *real_tty,
976 struct winsize *ws)
977 {
978 struct vc_data *vc = tty->driver_data;
979 int ret;
980
981 acquire_console_sem();
982 ret = vc_do_resize(tty, real_tty, vc, ws->ws_col, ws->ws_row);
983 release_console_sem();
984 return ret;
985 }
986
987 void vc_deallocate(unsigned int currcons)
988 {
989 WARN_CONSOLE_UNLOCKED();
990
991 if (vc_cons_allocated(currcons)) {
992 struct vc_data *vc = vc_cons[currcons].d;
993 struct vt_notifier_param param = { .vc = vc };
994 atomic_notifier_call_chain(&vt_notifier_list, VT_DEALLOCATE, &param);
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 * HZ;
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] = 0x01010101;
1649
1650 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1651 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1652
1653 gotoxy(vc, 0, 0);
1654 save_cur(vc);
1655 if (do_clear)
1656 csi_J(vc, 2);
1657 }
1658
1659 /* console_sem is held */
1660 static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
1661 {
1662 /*
1663 * Control characters can be used in the _middle_
1664 * of an escape sequence.
1665 */
1666 switch (c) {
1667 case 0:
1668 return;
1669 case 7:
1670 if (vc->vc_bell_duration)
1671 kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration);
1672 return;
1673 case 8:
1674 bs(vc);
1675 return;
1676 case 9:
1677 vc->vc_pos -= (vc->vc_x << 1);
1678 while (vc->vc_x < vc->vc_cols - 1) {
1679 vc->vc_x++;
1680 if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31)))
1681 break;
1682 }
1683 vc->vc_pos += (vc->vc_x << 1);
1684 notify_write(vc, '\t');
1685 return;
1686 case 10: case 11: case 12:
1687 lf(vc);
1688 if (!is_kbd(vc, lnm))
1689 return;
1690 case 13:
1691 cr(vc);
1692 return;
1693 case 14:
1694 vc->vc_charset = 1;
1695 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1696 vc->vc_disp_ctrl = 1;
1697 return;
1698 case 15:
1699 vc->vc_charset = 0;
1700 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1701 vc->vc_disp_ctrl = 0;
1702 return;
1703 case 24: case 26:
1704 vc->vc_state = ESnormal;
1705 return;
1706 case 27:
1707 vc->vc_state = ESesc;
1708 return;
1709 case 127:
1710 del(vc);
1711 return;
1712 case 128+27:
1713 vc->vc_state = ESsquare;
1714 return;
1715 }
1716 switch(vc->vc_state) {
1717 case ESesc:
1718 vc->vc_state = ESnormal;
1719 switch (c) {
1720 case '[':
1721 vc->vc_state = ESsquare;
1722 return;
1723 case ']':
1724 vc->vc_state = ESnonstd;
1725 return;
1726 case '%':
1727 vc->vc_state = ESpercent;
1728 return;
1729 case 'E':
1730 cr(vc);
1731 lf(vc);
1732 return;
1733 case 'M':
1734 ri(vc);
1735 return;
1736 case 'D':
1737 lf(vc);
1738 return;
1739 case 'H':
1740 vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31));
1741 return;
1742 case 'Z':
1743 respond_ID(tty);
1744 return;
1745 case '7':
1746 save_cur(vc);
1747 return;
1748 case '8':
1749 restore_cur(vc);
1750 return;
1751 case '(':
1752 vc->vc_state = ESsetG0;
1753 return;
1754 case ')':
1755 vc->vc_state = ESsetG1;
1756 return;
1757 case '#':
1758 vc->vc_state = EShash;
1759 return;
1760 case 'c':
1761 reset_terminal(vc, 1);
1762 return;
1763 case '>': /* Numeric keypad */
1764 clr_kbd(vc, kbdapplic);
1765 return;
1766 case '=': /* Appl. keypad */
1767 set_kbd(vc, kbdapplic);
1768 return;
1769 }
1770 return;
1771 case ESnonstd:
1772 if (c=='P') { /* palette escape sequence */
1773 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1774 vc->vc_par[vc->vc_npar] = 0;
1775 vc->vc_npar = 0;
1776 vc->vc_state = ESpalette;
1777 return;
1778 } else if (c=='R') { /* reset palette */
1779 reset_palette(vc);
1780 vc->vc_state = ESnormal;
1781 } else
1782 vc->vc_state = ESnormal;
1783 return;
1784 case ESpalette:
1785 if ( (c>='0'&&c<='9') || (c>='A'&&c<='F') || (c>='a'&&c<='f') ) {
1786 vc->vc_par[vc->vc_npar++] = (c > '9' ? (c & 0xDF) - 'A' + 10 : c - '0');
1787 if (vc->vc_npar == 7) {
1788 int i = vc->vc_par[0] * 3, j = 1;
1789 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1790 vc->vc_palette[i++] += vc->vc_par[j++];
1791 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1792 vc->vc_palette[i++] += vc->vc_par[j++];
1793 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1794 vc->vc_palette[i] += vc->vc_par[j];
1795 set_palette(vc);
1796 vc->vc_state = ESnormal;
1797 }
1798 } else
1799 vc->vc_state = ESnormal;
1800 return;
1801 case ESsquare:
1802 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1803 vc->vc_par[vc->vc_npar] = 0;
1804 vc->vc_npar = 0;
1805 vc->vc_state = ESgetpars;
1806 if (c == '[') { /* Function key */
1807 vc->vc_state=ESfunckey;
1808 return;
1809 }
1810 vc->vc_ques = (c == '?');
1811 if (vc->vc_ques)
1812 return;
1813 case ESgetpars:
1814 if (c == ';' && vc->vc_npar < NPAR - 1) {
1815 vc->vc_npar++;
1816 return;
1817 } else if (c>='0' && c<='9') {
1818 vc->vc_par[vc->vc_npar] *= 10;
1819 vc->vc_par[vc->vc_npar] += c - '0';
1820 return;
1821 } else
1822 vc->vc_state = ESgotpars;
1823 case ESgotpars:
1824 vc->vc_state = ESnormal;
1825 switch(c) {
1826 case 'h':
1827 set_mode(vc, 1);
1828 return;
1829 case 'l':
1830 set_mode(vc, 0);
1831 return;
1832 case 'c':
1833 if (vc->vc_ques) {
1834 if (vc->vc_par[0])
1835 vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16);
1836 else
1837 vc->vc_cursor_type = CUR_DEFAULT;
1838 return;
1839 }
1840 break;
1841 case 'm':
1842 if (vc->vc_ques) {
1843 clear_selection();
1844 if (vc->vc_par[0])
1845 vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1];
1846 else
1847 vc->vc_complement_mask = vc->vc_s_complement_mask;
1848 return;
1849 }
1850 break;
1851 case 'n':
1852 if (!vc->vc_ques) {
1853 if (vc->vc_par[0] == 5)
1854 status_report(tty);
1855 else if (vc->vc_par[0] == 6)
1856 cursor_report(vc, tty);
1857 }
1858 return;
1859 }
1860 if (vc->vc_ques) {
1861 vc->vc_ques = 0;
1862 return;
1863 }
1864 switch(c) {
1865 case 'G': case '`':
1866 if (vc->vc_par[0])
1867 vc->vc_par[0]--;
1868 gotoxy(vc, vc->vc_par[0], vc->vc_y);
1869 return;
1870 case 'A':
1871 if (!vc->vc_par[0])
1872 vc->vc_par[0]++;
1873 gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]);
1874 return;
1875 case 'B': case 'e':
1876 if (!vc->vc_par[0])
1877 vc->vc_par[0]++;
1878 gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]);
1879 return;
1880 case 'C': case 'a':
1881 if (!vc->vc_par[0])
1882 vc->vc_par[0]++;
1883 gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y);
1884 return;
1885 case 'D':
1886 if (!vc->vc_par[0])
1887 vc->vc_par[0]++;
1888 gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y);
1889 return;
1890 case 'E':
1891 if (!vc->vc_par[0])
1892 vc->vc_par[0]++;
1893 gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]);
1894 return;
1895 case 'F':
1896 if (!vc->vc_par[0])
1897 vc->vc_par[0]++;
1898 gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]);
1899 return;
1900 case 'd':
1901 if (vc->vc_par[0])
1902 vc->vc_par[0]--;
1903 gotoxay(vc, vc->vc_x ,vc->vc_par[0]);
1904 return;
1905 case 'H': case 'f':
1906 if (vc->vc_par[0])
1907 vc->vc_par[0]--;
1908 if (vc->vc_par[1])
1909 vc->vc_par[1]--;
1910 gotoxay(vc, vc->vc_par[1], vc->vc_par[0]);
1911 return;
1912 case 'J':
1913 csi_J(vc, vc->vc_par[0]);
1914 return;
1915 case 'K':
1916 csi_K(vc, vc->vc_par[0]);
1917 return;
1918 case 'L':
1919 csi_L(vc, vc->vc_par[0]);
1920 return;
1921 case 'M':
1922 csi_M(vc, vc->vc_par[0]);
1923 return;
1924 case 'P':
1925 csi_P(vc, vc->vc_par[0]);
1926 return;
1927 case 'c':
1928 if (!vc->vc_par[0])
1929 respond_ID(tty);
1930 return;
1931 case 'g':
1932 if (!vc->vc_par[0])
1933 vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31));
1934 else if (vc->vc_par[0] == 3) {
1935 vc->vc_tab_stop[0] =
1936 vc->vc_tab_stop[1] =
1937 vc->vc_tab_stop[2] =
1938 vc->vc_tab_stop[3] =
1939 vc->vc_tab_stop[4] = 0;
1940 }
1941 return;
1942 case 'm':
1943 csi_m(vc);
1944 return;
1945 case 'q': /* DECLL - but only 3 leds */
1946 /* map 0,1,2,3 to 0,1,2,4 */
1947 if (vc->vc_par[0] < 4)
1948 setledstate(kbd_table + vc->vc_num,
1949 (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4);
1950 return;
1951 case 'r':
1952 if (!vc->vc_par[0])
1953 vc->vc_par[0]++;
1954 if (!vc->vc_par[1])
1955 vc->vc_par[1] = vc->vc_rows;
1956 /* Minimum allowed region is 2 lines */
1957 if (vc->vc_par[0] < vc->vc_par[1] &&
1958 vc->vc_par[1] <= vc->vc_rows) {
1959 vc->vc_top = vc->vc_par[0] - 1;
1960 vc->vc_bottom = vc->vc_par[1];
1961 gotoxay(vc, 0, 0);
1962 }
1963 return;
1964 case 's':
1965 save_cur(vc);
1966 return;
1967 case 'u':
1968 restore_cur(vc);
1969 return;
1970 case 'X':
1971 csi_X(vc, vc->vc_par[0]);
1972 return;
1973 case '@':
1974 csi_at(vc, vc->vc_par[0]);
1975 return;
1976 case ']': /* setterm functions */
1977 setterm_command(vc);
1978 return;
1979 }
1980 return;
1981 case ESpercent:
1982 vc->vc_state = ESnormal;
1983 switch (c) {
1984 case '@': /* defined in ISO 2022 */
1985 vc->vc_utf = 0;
1986 return;
1987 case 'G': /* prelim official escape code */
1988 case '8': /* retained for compatibility */
1989 vc->vc_utf = 1;
1990 return;
1991 }
1992 return;
1993 case ESfunckey:
1994 vc->vc_state = ESnormal;
1995 return;
1996 case EShash:
1997 vc->vc_state = ESnormal;
1998 if (c == '8') {
1999 /* DEC screen alignment test. kludge :-) */
2000 vc->vc_video_erase_char =
2001 (vc->vc_video_erase_char & 0xff00) | 'E';
2002 csi_J(vc, 2);
2003 vc->vc_video_erase_char =
2004 (vc->vc_video_erase_char & 0xff00) | ' ';
2005 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
2006 }
2007 return;
2008 case ESsetG0:
2009 if (c == '0')
2010 vc->vc_G0_charset = GRAF_MAP;
2011 else if (c == 'B')
2012 vc->vc_G0_charset = LAT1_MAP;
2013 else if (c == 'U')
2014 vc->vc_G0_charset = IBMPC_MAP;
2015 else if (c == 'K')
2016 vc->vc_G0_charset = USER_MAP;
2017 if (vc->vc_charset == 0)
2018 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
2019 vc->vc_state = ESnormal;
2020 return;
2021 case ESsetG1:
2022 if (c == '0')
2023 vc->vc_G1_charset = GRAF_MAP;
2024 else if (c == 'B')
2025 vc->vc_G1_charset = LAT1_MAP;
2026 else if (c == 'U')
2027 vc->vc_G1_charset = IBMPC_MAP;
2028 else if (c == 'K')
2029 vc->vc_G1_charset = USER_MAP;
2030 if (vc->vc_charset == 1)
2031 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
2032 vc->vc_state = ESnormal;
2033 return;
2034 default:
2035 vc->vc_state = ESnormal;
2036 }
2037 }
2038
2039 /* This is a temporary buffer used to prepare a tty console write
2040 * so that we can easily avoid touching user space while holding the
2041 * console spinlock. It is allocated in con_init and is shared by
2042 * this code and the vc_screen read/write tty calls.
2043 *
2044 * We have to allocate this statically in the kernel data section
2045 * since console_init (and thus con_init) are called before any
2046 * kernel memory allocation is available.
2047 */
2048 char con_buf[CON_BUF_SIZE];
2049 DEFINE_MUTEX(con_buf_mtx);
2050
2051 /* is_double_width() is based on the wcwidth() implementation by
2052 * Markus Kuhn -- 2007-05-26 (Unicode 5.0)
2053 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
2054 */
2055 struct interval {
2056 uint32_t first;
2057 uint32_t last;
2058 };
2059
2060 static int bisearch(uint32_t ucs, const struct interval *table, int max)
2061 {
2062 int min = 0;
2063 int mid;
2064
2065 if (ucs < table[0].first || ucs > table[max].last)
2066 return 0;
2067 while (max >= min) {
2068 mid = (min + max) / 2;
2069 if (ucs > table[mid].last)
2070 min = mid + 1;
2071 else if (ucs < table[mid].first)
2072 max = mid - 1;
2073 else
2074 return 1;
2075 }
2076 return 0;
2077 }
2078
2079 static int is_double_width(uint32_t ucs)
2080 {
2081 static const struct interval double_width[] = {
2082 { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E },
2083 { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF },
2084 { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 },
2085 { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD }
2086 };
2087 return bisearch(ucs, double_width, ARRAY_SIZE(double_width) - 1);
2088 }
2089
2090 /* acquires console_sem */
2091 static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2092 {
2093 #ifdef VT_BUF_VRAM_ONLY
2094 #define FLUSH do { } while(0);
2095 #else
2096 #define FLUSH if (draw_x >= 0) { \
2097 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
2098 draw_x = -1; \
2099 }
2100 #endif
2101
2102 int c, tc, ok, n = 0, draw_x = -1;
2103 unsigned int currcons;
2104 unsigned long draw_from = 0, draw_to = 0;
2105 struct vc_data *vc;
2106 unsigned char vc_attr;
2107 struct vt_notifier_param param;
2108 uint8_t rescan;
2109 uint8_t inverse;
2110 uint8_t width;
2111 u16 himask, charmask;
2112 const unsigned char *orig_buf = NULL;
2113 int orig_count;
2114
2115 if (in_interrupt())
2116 return count;
2117
2118 might_sleep();
2119
2120 acquire_console_sem();
2121 vc = tty->driver_data;
2122 if (vc == NULL) {
2123 printk(KERN_ERR "vt: argh, driver_data is NULL !\n");
2124 release_console_sem();
2125 return 0;
2126 }
2127
2128 currcons = vc->vc_num;
2129 if (!vc_cons_allocated(currcons)) {
2130 /* could this happen? */
2131 static int error = 0;
2132 if (!error) {
2133 error = 1;
2134 printk("con_write: tty %d not allocated\n", currcons+1);
2135 }
2136 release_console_sem();
2137 return 0;
2138 }
2139 orig_buf = buf;
2140 orig_count = count;
2141
2142 himask = vc->vc_hi_font_mask;
2143 charmask = himask ? 0x1ff : 0xff;
2144
2145 /* undraw cursor first */
2146 if (IS_FG(vc))
2147 hide_cursor(vc);
2148
2149 param.vc = vc;
2150
2151 while (!tty->stopped && count) {
2152 int orig = *buf;
2153 c = orig;
2154 buf++;
2155 n++;
2156 count--;
2157 rescan = 0;
2158 inverse = 0;
2159 width = 1;
2160
2161 /* Do no translation at all in control states */
2162 if (vc->vc_state != ESnormal) {
2163 tc = c;
2164 } else if (vc->vc_utf && !vc->vc_disp_ctrl) {
2165 /* Combine UTF-8 into Unicode in vc_utf_char.
2166 * vc_utf_count is the number of continuation bytes still
2167 * expected to arrive.
2168 * vc_npar is the number of continuation bytes arrived so
2169 * far
2170 */
2171 rescan_last_byte:
2172 if ((c & 0xc0) == 0x80) {
2173 /* Continuation byte received */
2174 static const uint32_t utf8_length_changes[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff };
2175 if (vc->vc_utf_count) {
2176 vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f);
2177 vc->vc_npar++;
2178 if (--vc->vc_utf_count) {
2179 /* Still need some bytes */
2180 continue;
2181 }
2182 /* Got a whole character */
2183 c = vc->vc_utf_char;
2184 /* Reject overlong sequences */
2185 if (c <= utf8_length_changes[vc->vc_npar - 1] ||
2186 c > utf8_length_changes[vc->vc_npar])
2187 c = 0xfffd;
2188 } else {
2189 /* Unexpected continuation byte */
2190 vc->vc_utf_count = 0;
2191 c = 0xfffd;
2192 }
2193 } else {
2194 /* Single ASCII byte or first byte of a sequence received */
2195 if (vc->vc_utf_count) {
2196 /* Continuation byte expected */
2197 rescan = 1;
2198 vc->vc_utf_count = 0;
2199 c = 0xfffd;
2200 } else if (c > 0x7f) {
2201 /* First byte of a multibyte sequence received */
2202 vc->vc_npar = 0;
2203 if ((c & 0xe0) == 0xc0) {
2204 vc->vc_utf_count = 1;
2205 vc->vc_utf_char = (c & 0x1f);
2206 } else if ((c & 0xf0) == 0xe0) {
2207 vc->vc_utf_count = 2;
2208 vc->vc_utf_char = (c & 0x0f);
2209 } else if ((c & 0xf8) == 0xf0) {
2210 vc->vc_utf_count = 3;
2211 vc->vc_utf_char = (c & 0x07);
2212 } else if ((c & 0xfc) == 0xf8) {
2213 vc->vc_utf_count = 4;
2214 vc->vc_utf_char = (c & 0x03);
2215 } else if ((c & 0xfe) == 0xfc) {
2216 vc->vc_utf_count = 5;
2217 vc->vc_utf_char = (c & 0x01);
2218 } else {
2219 /* 254 and 255 are invalid */
2220 c = 0xfffd;
2221 }
2222 if (vc->vc_utf_count) {
2223 /* Still need some bytes */
2224 continue;
2225 }
2226 }
2227 /* Nothing to do if an ASCII byte was received */
2228 }
2229 /* End of UTF-8 decoding. */
2230 /* c is the received character, or U+FFFD for invalid sequences. */
2231 /* Replace invalid Unicode code points with U+FFFD too */
2232 if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff)
2233 c = 0xfffd;
2234 tc = c;
2235 } else { /* no utf or alternate charset mode */
2236 tc = vc_translate(vc, c);
2237 }
2238
2239 param.c = tc;
2240 if (atomic_notifier_call_chain(&vt_notifier_list, VT_PREWRITE,
2241 &param) == NOTIFY_STOP)
2242 continue;
2243
2244 /* If the original code was a control character we
2245 * only allow a glyph to be displayed if the code is
2246 * not normally used (such as for cursor movement) or
2247 * if the disp_ctrl mode has been explicitly enabled.
2248 * Certain characters (as given by the CTRL_ALWAYS
2249 * bitmap) are always displayed as control characters,
2250 * as the console would be pretty useless without
2251 * them; to display an arbitrary font position use the
2252 * direct-to-font zone in UTF-8 mode.
2253 */
2254 ok = tc && (c >= 32 ||
2255 !(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 :
2256 vc->vc_utf || ((CTRL_ACTION >> c) & 1)))
2257 && (c != 127 || vc->vc_disp_ctrl)
2258 && (c != 128+27);
2259
2260 if (vc->vc_state == ESnormal && ok) {
2261 if (vc->vc_utf && !vc->vc_disp_ctrl) {
2262 if (is_double_width(c))
2263 width = 2;
2264 }
2265 /* Now try to find out how to display it */
2266 tc = conv_uni_to_pc(vc, tc);
2267 if (tc & ~charmask) {
2268 if (tc == -1 || tc == -2) {
2269 continue; /* nothing to display */
2270 }
2271 /* Glyph not found */
2272 if ((!(vc->vc_utf && !vc->vc_disp_ctrl) || c < 128) && !(c & ~charmask)) {
2273 /* In legacy mode use the glyph we get by a 1:1 mapping.
2274 This would make absolutely no sense with Unicode in mind,
2275 but do this for ASCII characters since a font may lack
2276 Unicode mapping info and we don't want to end up with
2277 having question marks only. */
2278 tc = c;
2279 } else {
2280 /* Display U+FFFD. If it's not found, display an inverse question mark. */
2281 tc = conv_uni_to_pc(vc, 0xfffd);
2282 if (tc < 0) {
2283 inverse = 1;
2284 tc = conv_uni_to_pc(vc, '?');
2285 if (tc < 0) tc = '?';
2286 }
2287 }
2288 }
2289
2290 if (!inverse) {
2291 vc_attr = vc->vc_attr;
2292 } else {
2293 /* invert vc_attr */
2294 if (!vc->vc_can_do_color) {
2295 vc_attr = (vc->vc_attr) ^ 0x08;
2296 } else if (vc->vc_hi_font_mask == 0x100) {
2297 vc_attr = ((vc->vc_attr) & 0x11) | (((vc->vc_attr) & 0xe0) >> 4) | (((vc->vc_attr) & 0x0e) << 4);
2298 } else {
2299 vc_attr = ((vc->vc_attr) & 0x88) | (((vc->vc_attr) & 0x70) >> 4) | (((vc->vc_attr) & 0x07) << 4);
2300 }
2301 FLUSH
2302 }
2303
2304 while (1) {
2305 if (vc->vc_need_wrap || vc->vc_decim)
2306 FLUSH
2307 if (vc->vc_need_wrap) {
2308 cr(vc);
2309 lf(vc);
2310 }
2311 if (vc->vc_decim)
2312 insert_char(vc, 1);
2313 scr_writew(himask ?
2314 ((vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) :
2315 (vc_attr << 8) + tc,
2316 (u16 *) vc->vc_pos);
2317 if (DO_UPDATE(vc) && draw_x < 0) {
2318 draw_x = vc->vc_x;
2319 draw_from = vc->vc_pos;
2320 }
2321 if (vc->vc_x == vc->vc_cols - 1) {
2322 vc->vc_need_wrap = vc->vc_decawm;
2323 draw_to = vc->vc_pos + 2;
2324 } else {
2325 vc->vc_x++;
2326 draw_to = (vc->vc_pos += 2);
2327 }
2328
2329 if (!--width) break;
2330
2331 tc = conv_uni_to_pc(vc, ' '); /* A space is printed in the second column */
2332 if (tc < 0) tc = ' ';
2333 }
2334 notify_write(vc, c);
2335
2336 if (inverse) {
2337 FLUSH
2338 }
2339
2340 if (rescan) {
2341 rescan = 0;
2342 inverse = 0;
2343 width = 1;
2344 c = orig;
2345 goto rescan_last_byte;
2346 }
2347 continue;
2348 }
2349 FLUSH
2350 do_con_trol(tty, vc, orig);
2351 }
2352 FLUSH
2353 console_conditional_schedule();
2354 release_console_sem();
2355 notify_update(vc);
2356 return n;
2357 #undef FLUSH
2358 }
2359
2360 /*
2361 * This is the console switching callback.
2362 *
2363 * Doing console switching in a process context allows
2364 * us to do the switches asynchronously (needed when we want
2365 * to switch due to a keyboard interrupt). Synchronization
2366 * with other console code and prevention of re-entrancy is
2367 * ensured with console_sem.
2368 */
2369 static void console_callback(struct work_struct *ignored)
2370 {
2371 acquire_console_sem();
2372
2373 if (want_console >= 0) {
2374 if (want_console != fg_console &&
2375 vc_cons_allocated(want_console)) {
2376 hide_cursor(vc_cons[fg_console].d);
2377 change_console(vc_cons[want_console].d);
2378 /* we only changed when the console had already
2379 been allocated - a new console is not created
2380 in an interrupt routine */
2381 }
2382 want_console = -1;
2383 }
2384 if (do_poke_blanked_console) { /* do not unblank for a LED change */
2385 do_poke_blanked_console = 0;
2386 poke_blanked_console();
2387 }
2388 if (scrollback_delta) {
2389 struct vc_data *vc = vc_cons[fg_console].d;
2390 clear_selection();
2391 if (vc->vc_mode == KD_TEXT)
2392 vc->vc_sw->con_scrolldelta(vc, scrollback_delta);
2393 scrollback_delta = 0;
2394 }
2395 if (blank_timer_expired) {
2396 do_blank_screen(0);
2397 blank_timer_expired = 0;
2398 }
2399 notify_update(vc_cons[fg_console].d);
2400
2401 release_console_sem();
2402 }
2403
2404 int set_console(int nr)
2405 {
2406 struct vc_data *vc = vc_cons[fg_console].d;
2407
2408 if (!vc_cons_allocated(nr) || vt_dont_switch ||
2409 (vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) {
2410
2411 /*
2412 * Console switch will fail in console_callback() or
2413 * change_console() so there is no point scheduling
2414 * the callback
2415 *
2416 * Existing set_console() users don't check the return
2417 * value so this shouldn't break anything
2418 */
2419 return -EINVAL;
2420 }
2421
2422 want_console = nr;
2423 schedule_console_callback();
2424
2425 return 0;
2426 }
2427
2428 struct tty_driver *console_driver;
2429
2430 #ifdef CONFIG_VT_CONSOLE
2431
2432 /*
2433 * Console on virtual terminal
2434 *
2435 * The console must be locked when we get here.
2436 */
2437
2438 static void vt_console_print(struct console *co, const char *b, unsigned count)
2439 {
2440 struct vc_data *vc = vc_cons[fg_console].d;
2441 unsigned char c;
2442 static DEFINE_SPINLOCK(printing_lock);
2443 const ushort *start;
2444 ushort cnt = 0;
2445 ushort myx;
2446
2447 /* console busy or not yet initialized */
2448 if (!printable)
2449 return;
2450 if (!spin_trylock(&printing_lock))
2451 return;
2452
2453 if (kmsg_redirect && vc_cons_allocated(kmsg_redirect - 1))
2454 vc = vc_cons[kmsg_redirect - 1].d;
2455
2456 /* read `x' only after setting currcons properly (otherwise
2457 the `x' macro will read the x of the foreground console). */
2458 myx = vc->vc_x;
2459
2460 if (!vc_cons_allocated(fg_console)) {
2461 /* impossible */
2462 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2463 goto quit;
2464 }
2465
2466 if (vc->vc_mode != KD_TEXT)
2467 goto quit;
2468
2469 /* undraw cursor first */
2470 if (IS_FG(vc))
2471 hide_cursor(vc);
2472
2473 start = (ushort *)vc->vc_pos;
2474
2475 /* Contrived structure to try to emulate original need_wrap behaviour
2476 * Problems caused when we have need_wrap set on '\n' character */
2477 while (count--) {
2478 c = *b++;
2479 if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) {
2480 if (cnt > 0) {
2481 if (CON_IS_VISIBLE(vc))
2482 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2483 vc->vc_x += cnt;
2484 if (vc->vc_need_wrap)
2485 vc->vc_x--;
2486 cnt = 0;
2487 }
2488 if (c == 8) { /* backspace */
2489 bs(vc);
2490 start = (ushort *)vc->vc_pos;
2491 myx = vc->vc_x;
2492 continue;
2493 }
2494 if (c != 13)
2495 lf(vc);
2496 cr(vc);
2497 start = (ushort *)vc->vc_pos;
2498 myx = vc->vc_x;
2499 if (c == 10 || c == 13)
2500 continue;
2501 }
2502 scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos);
2503 notify_write(vc, c);
2504 cnt++;
2505 if (myx == vc->vc_cols - 1) {
2506 vc->vc_need_wrap = 1;
2507 continue;
2508 }
2509 vc->vc_pos += 2;
2510 myx++;
2511 }
2512 if (cnt > 0) {
2513 if (CON_IS_VISIBLE(vc))
2514 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2515 vc->vc_x += cnt;
2516 if (vc->vc_x == vc->vc_cols) {
2517 vc->vc_x--;
2518 vc->vc_need_wrap = 1;
2519 }
2520 }
2521 set_cursor(vc);
2522 notify_update(vc);
2523
2524 quit:
2525 spin_unlock(&printing_lock);
2526 }
2527
2528 static struct tty_driver *vt_console_device(struct console *c, int *index)
2529 {
2530 *index = c->index ? c->index-1 : fg_console;
2531 return console_driver;
2532 }
2533
2534 static struct console vt_console_driver = {
2535 .name = "tty",
2536 .write = vt_console_print,
2537 .device = vt_console_device,
2538 .unblank = unblank_screen,
2539 .flags = CON_PRINTBUFFER,
2540 .index = -1,
2541 };
2542 #endif
2543
2544 /*
2545 * Handling of Linux-specific VC ioctls
2546 */
2547
2548 /*
2549 * Generally a bit racy with respect to console_sem().
2550 *
2551 * There are some functions which don't need it.
2552 *
2553 * There are some functions which can sleep for arbitrary periods
2554 * (paste_selection) but we don't need the lock there anyway.
2555 *
2556 * set_selection has locking, and definitely needs it
2557 */
2558
2559 int tioclinux(struct tty_struct *tty, unsigned long arg)
2560 {
2561 char type, data;
2562 char __user *p = (char __user *)arg;
2563 int lines;
2564 int ret;
2565
2566 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN))
2567 return -EPERM;
2568 if (get_user(type, p))
2569 return -EFAULT;
2570 ret = 0;
2571
2572 lock_kernel();
2573
2574 switch (type)
2575 {
2576 case TIOCL_SETSEL:
2577 acquire_console_sem();
2578 ret = set_selection((struct tiocl_selection __user *)(p+1), tty);
2579 release_console_sem();
2580 break;
2581 case TIOCL_PASTESEL:
2582 ret = paste_selection(tty);
2583 break;
2584 case TIOCL_UNBLANKSCREEN:
2585 acquire_console_sem();
2586 unblank_screen();
2587 release_console_sem();
2588 break;
2589 case TIOCL_SELLOADLUT:
2590 ret = sel_loadlut(p);
2591 break;
2592 case TIOCL_GETSHIFTSTATE:
2593
2594 /*
2595 * Make it possible to react to Shift+Mousebutton.
2596 * Note that 'shift_state' is an undocumented
2597 * kernel-internal variable; programs not closely
2598 * related to the kernel should not use this.
2599 */
2600 data = shift_state;
2601 ret = __put_user(data, p);
2602 break;
2603 case TIOCL_GETMOUSEREPORTING:
2604 data = mouse_reporting();
2605 ret = __put_user(data, p);
2606 break;
2607 case TIOCL_SETVESABLANK:
2608 ret = set_vesa_blanking(p);
2609 break;
2610 case TIOCL_GETKMSGREDIRECT:
2611 data = kmsg_redirect;
2612 ret = __put_user(data, p);
2613 break;
2614 case TIOCL_SETKMSGREDIRECT:
2615 if (!capable(CAP_SYS_ADMIN)) {
2616 ret = -EPERM;
2617 } else {
2618 if (get_user(data, p+1))
2619 ret = -EFAULT;
2620 else
2621 kmsg_redirect = data;
2622 }
2623 break;
2624 case TIOCL_GETFGCONSOLE:
2625 ret = fg_console;
2626 break;
2627 case TIOCL_SCROLLCONSOLE:
2628 if (get_user(lines, (s32 __user *)(p+4))) {
2629 ret = -EFAULT;
2630 } else {
2631 scrollfront(vc_cons[fg_console].d, lines);
2632 ret = 0;
2633 }
2634 break;
2635 case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
2636 acquire_console_sem();
2637 ignore_poke = 1;
2638 do_blank_screen(0);
2639 release_console_sem();
2640 break;
2641 case TIOCL_BLANKEDSCREEN:
2642 ret = console_blanked;
2643 break;
2644 default:
2645 ret = -EINVAL;
2646 break;
2647 }
2648 unlock_kernel();
2649 return ret;
2650 }
2651
2652 /*
2653 * /dev/ttyN handling
2654 */
2655
2656 static int con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2657 {
2658 int retval;
2659
2660 retval = do_con_write(tty, buf, count);
2661 con_flush_chars(tty);
2662
2663 return retval;
2664 }
2665
2666 static int con_put_char(struct tty_struct *tty, unsigned char ch)
2667 {
2668 if (in_interrupt())
2669 return 0; /* n_r3964 calls put_char() from interrupt context */
2670 return do_con_write(tty, &ch, 1);
2671 }
2672
2673 static int con_write_room(struct tty_struct *tty)
2674 {
2675 if (tty->stopped)
2676 return 0;
2677 return 4096; /* No limit, really; we're not buffering */
2678 }
2679
2680 static int con_chars_in_buffer(struct tty_struct *tty)
2681 {
2682 return 0; /* we're not buffering */
2683 }
2684
2685 /*
2686 * con_throttle and con_unthrottle are only used for
2687 * paste_selection(), which has to stuff in a large number of
2688 * characters...
2689 */
2690 static void con_throttle(struct tty_struct *tty)
2691 {
2692 }
2693
2694 static void con_unthrottle(struct tty_struct *tty)
2695 {
2696 struct vc_data *vc = tty->driver_data;
2697
2698 wake_up_interruptible(&vc->paste_wait);
2699 }
2700
2701 /*
2702 * Turn the Scroll-Lock LED on when the tty is stopped
2703 */
2704 static void con_stop(struct tty_struct *tty)
2705 {
2706 int console_num;
2707 if (!tty)
2708 return;
2709 console_num = tty->index;
2710 if (!vc_cons_allocated(console_num))
2711 return;
2712 set_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2713 set_leds();
2714 }
2715
2716 /*
2717 * Turn the Scroll-Lock LED off when the console is started
2718 */
2719 static void con_start(struct tty_struct *tty)
2720 {
2721 int console_num;
2722 if (!tty)
2723 return;
2724 console_num = tty->index;
2725 if (!vc_cons_allocated(console_num))
2726 return;
2727 clr_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2728 set_leds();
2729 }
2730
2731 static void con_flush_chars(struct tty_struct *tty)
2732 {
2733 struct vc_data *vc;
2734
2735 if (in_interrupt()) /* from flush_to_ldisc */
2736 return;
2737
2738 /* if we race with con_close(), vt may be null */
2739 acquire_console_sem();
2740 vc = tty->driver_data;
2741 if (vc)
2742 set_cursor(vc);
2743 release_console_sem();
2744 }
2745
2746 /*
2747 * Allocate the console screen memory.
2748 */
2749 static int con_open(struct tty_struct *tty, struct file *filp)
2750 {
2751 unsigned int currcons = tty->index;
2752 int ret = 0;
2753
2754 acquire_console_sem();
2755 if (tty->driver_data == NULL) {
2756 ret = vc_allocate(currcons);
2757 if (ret == 0) {
2758 struct vc_data *vc = vc_cons[currcons].d;
2759
2760 /* Still being freed */
2761 if (vc->vc_tty) {
2762 release_console_sem();
2763 return -ERESTARTSYS;
2764 }
2765 tty->driver_data = vc;
2766 vc->vc_tty = tty;
2767
2768 if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
2769 tty->winsize.ws_row = vc_cons[currcons].d->vc_rows;
2770 tty->winsize.ws_col = vc_cons[currcons].d->vc_cols;
2771 }
2772 if (vc->vc_utf)
2773 tty->termios->c_iflag |= IUTF8;
2774 else
2775 tty->termios->c_iflag &= ~IUTF8;
2776 vcs_make_sysfs(tty);
2777 release_console_sem();
2778 return ret;
2779 }
2780 }
2781 release_console_sem();
2782 return ret;
2783 }
2784
2785 static void con_close(struct tty_struct *tty, struct file *filp)
2786 {
2787 /* Nothing to do - we defer to shutdown */
2788 }
2789
2790 static void con_shutdown(struct tty_struct *tty)
2791 {
2792 struct vc_data *vc = tty->driver_data;
2793 BUG_ON(vc == NULL);
2794 acquire_console_sem();
2795 vc->vc_tty = NULL;
2796 vcs_remove_sysfs(tty);
2797 release_console_sem();
2798 tty_shutdown(tty);
2799 }
2800
2801 static int default_italic_color = 2; // green (ASCII)
2802 static int default_underline_color = 3; // cyan (ASCII)
2803 module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR);
2804 module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR);
2805
2806 static void vc_init(struct vc_data *vc, unsigned int rows,
2807 unsigned int cols, int do_clear)
2808 {
2809 int j, k ;
2810
2811 vc->vc_cols = cols;
2812 vc->vc_rows = rows;
2813 vc->vc_size_row = cols << 1;
2814 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
2815
2816 set_origin(vc);
2817 vc->vc_pos = vc->vc_origin;
2818 reset_vc(vc);
2819 for (j=k=0; j<16; j++) {
2820 vc->vc_palette[k++] = default_red[j] ;
2821 vc->vc_palette[k++] = default_grn[j] ;
2822 vc->vc_palette[k++] = default_blu[j] ;
2823 }
2824 vc->vc_def_color = 0x07; /* white */
2825 vc->vc_ulcolor = default_underline_color;
2826 vc->vc_itcolor = default_italic_color;
2827 vc->vc_halfcolor = 0x08; /* grey */
2828 init_waitqueue_head(&vc->paste_wait);
2829 reset_terminal(vc, do_clear);
2830 }
2831
2832 /*
2833 * This routine initializes console interrupts, and does nothing
2834 * else. If you want the screen to clear, call tty_write with
2835 * the appropriate escape-sequence.
2836 */
2837
2838 static int __init con_init(void)
2839 {
2840 const char *display_desc = NULL;
2841 struct vc_data *vc;
2842 unsigned int currcons = 0, i;
2843
2844 acquire_console_sem();
2845
2846 if (conswitchp)
2847 display_desc = conswitchp->con_startup();
2848 if (!display_desc) {
2849 fg_console = 0;
2850 release_console_sem();
2851 return 0;
2852 }
2853
2854 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2855 struct con_driver *con_driver = &registered_con_driver[i];
2856
2857 if (con_driver->con == NULL) {
2858 con_driver->con = conswitchp;
2859 con_driver->desc = display_desc;
2860 con_driver->flag = CON_DRIVER_FLAG_INIT;
2861 con_driver->first = 0;
2862 con_driver->last = MAX_NR_CONSOLES - 1;
2863 break;
2864 }
2865 }
2866
2867 for (i = 0; i < MAX_NR_CONSOLES; i++)
2868 con_driver_map[i] = conswitchp;
2869
2870 if (blankinterval) {
2871 blank_state = blank_normal_wait;
2872 mod_timer(&console_timer, jiffies + blankinterval);
2873 }
2874
2875 /*
2876 * kmalloc is not running yet - we use the bootmem allocator.
2877 */
2878 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) {
2879 vc_cons[currcons].d = vc = alloc_bootmem(sizeof(struct vc_data));
2880 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
2881 visual_init(vc, currcons, 1);
2882 vc->vc_screenbuf = (unsigned short *)alloc_bootmem(vc->vc_screenbuf_size);
2883 vc->vc_kmalloced = 0;
2884 vc_init(vc, vc->vc_rows, vc->vc_cols,
2885 currcons || !vc->vc_sw->con_save_screen);
2886 }
2887 currcons = fg_console = 0;
2888 master_display_fg = vc = vc_cons[currcons].d;
2889 set_origin(vc);
2890 save_screen(vc);
2891 gotoxy(vc, vc->vc_x, vc->vc_y);
2892 csi_J(vc, 0);
2893 update_screen(vc);
2894 printk("Console: %s %s %dx%d",
2895 vc->vc_can_do_color ? "colour" : "mono",
2896 display_desc, vc->vc_cols, vc->vc_rows);
2897 printable = 1;
2898 printk("\n");
2899
2900 release_console_sem();
2901
2902 #ifdef CONFIG_VT_CONSOLE
2903 register_console(&vt_console_driver);
2904 #endif
2905 return 0;
2906 }
2907 console_initcall(con_init);
2908
2909 static const struct tty_operations con_ops = {
2910 .open = con_open,
2911 .close = con_close,
2912 .write = con_write,
2913 .write_room = con_write_room,
2914 .put_char = con_put_char,
2915 .flush_chars = con_flush_chars,
2916 .chars_in_buffer = con_chars_in_buffer,
2917 .ioctl = vt_ioctl,
2918 .stop = con_stop,
2919 .start = con_start,
2920 .throttle = con_throttle,
2921 .unthrottle = con_unthrottle,
2922 .resize = vt_resize,
2923 .shutdown = con_shutdown
2924 };
2925
2926 static struct cdev vc0_cdev;
2927
2928 int __init vty_init(const struct file_operations *console_fops)
2929 {
2930 cdev_init(&vc0_cdev, console_fops);
2931 if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) ||
2932 register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0)
2933 panic("Couldn't register /dev/tty0 driver\n");
2934 device_create(tty_class, NULL, MKDEV(TTY_MAJOR, 0), NULL, "tty0");
2935
2936 vcs_init();
2937
2938 console_driver = alloc_tty_driver(MAX_NR_CONSOLES);
2939 if (!console_driver)
2940 panic("Couldn't allocate console driver\n");
2941 console_driver->owner = THIS_MODULE;
2942 console_driver->name = "tty";
2943 console_driver->name_base = 1;
2944 console_driver->major = TTY_MAJOR;
2945 console_driver->minor_start = 1;
2946 console_driver->type = TTY_DRIVER_TYPE_CONSOLE;
2947 console_driver->init_termios = tty_std_termios;
2948 if (default_utf8)
2949 console_driver->init_termios.c_iflag |= IUTF8;
2950 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS;
2951 tty_set_operations(console_driver, &con_ops);
2952 if (tty_register_driver(console_driver))
2953 panic("Couldn't register console driver\n");
2954 kbd_init();
2955 console_map_init();
2956 #ifdef CONFIG_PROM_CONSOLE
2957 prom_con_init();
2958 #endif
2959 #ifdef CONFIG_MDA_CONSOLE
2960 mda_console_init();
2961 #endif
2962 return 0;
2963 }
2964
2965 #ifndef VT_SINGLE_DRIVER
2966 #include <linux/device.h>
2967
2968 static struct class *vtconsole_class;
2969
2970 static int bind_con_driver(const struct consw *csw, int first, int last,
2971 int deflt)
2972 {
2973 struct module *owner = csw->owner;
2974 const char *desc = NULL;
2975 struct con_driver *con_driver;
2976 int i, j = -1, k = -1, retval = -ENODEV;
2977
2978 if (!try_module_get(owner))
2979 return -ENODEV;
2980
2981 acquire_console_sem();
2982
2983 /* check if driver is registered */
2984 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2985 con_driver = &registered_con_driver[i];
2986
2987 if (con_driver->con == csw) {
2988 desc = con_driver->desc;
2989 retval = 0;
2990 break;
2991 }
2992 }
2993
2994 if (retval)
2995 goto err;
2996
2997 if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) {
2998 csw->con_startup();
2999 con_driver->flag |= CON_DRIVER_FLAG_INIT;
3000 }
3001
3002 if (deflt) {
3003 if (conswitchp)
3004 module_put(conswitchp->owner);
3005
3006 __module_get(owner);
3007 conswitchp = csw;
3008 }
3009
3010 first = max(first, con_driver->first);
3011 last = min(last, con_driver->last);
3012
3013 for (i = first; i <= last; i++) {
3014 int old_was_color;
3015 struct vc_data *vc = vc_cons[i].d;
3016
3017 if (con_driver_map[i])
3018 module_put(con_driver_map[i]->owner);
3019 __module_get(owner);
3020 con_driver_map[i] = csw;
3021
3022 if (!vc || !vc->vc_sw)
3023 continue;
3024
3025 j = i;
3026
3027 if (CON_IS_VISIBLE(vc)) {
3028 k = i;
3029 save_screen(vc);
3030 }
3031
3032 old_was_color = vc->vc_can_do_color;
3033 vc->vc_sw->con_deinit(vc);
3034 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
3035 visual_init(vc, i, 0);
3036 set_origin(vc);
3037 update_attr(vc);
3038
3039 /* If the console changed between mono <-> color, then
3040 * the attributes in the screenbuf will be wrong. The
3041 * following resets all attributes to something sane.
3042 */
3043 if (old_was_color != vc->vc_can_do_color)
3044 clear_buffer_attributes(vc);
3045 }
3046
3047 printk("Console: switching ");
3048 if (!deflt)
3049 printk("consoles %d-%d ", first+1, last+1);
3050 if (j >= 0) {
3051 struct vc_data *vc = vc_cons[j].d;
3052
3053 printk("to %s %s %dx%d\n",
3054 vc->vc_can_do_color ? "colour" : "mono",
3055 desc, vc->vc_cols, vc->vc_rows);
3056
3057 if (k >= 0) {
3058 vc = vc_cons[k].d;
3059 update_screen(vc);
3060 }
3061 } else
3062 printk("to %s\n", desc);
3063
3064 retval = 0;
3065 err:
3066 release_console_sem();
3067 module_put(owner);
3068 return retval;
3069 };
3070
3071 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
3072 static int con_is_graphics(const struct consw *csw, int first, int last)
3073 {
3074 int i, retval = 0;
3075
3076 for (i = first; i <= last; i++) {
3077 struct vc_data *vc = vc_cons[i].d;
3078
3079 if (vc && vc->vc_mode == KD_GRAPHICS) {
3080 retval = 1;
3081 break;
3082 }
3083 }
3084
3085 return retval;
3086 }
3087
3088 /**
3089 * unbind_con_driver - unbind a console driver
3090 * @csw: pointer to console driver to unregister
3091 * @first: first in range of consoles that @csw should be unbound from
3092 * @last: last in range of consoles that @csw should be unbound from
3093 * @deflt: should next bound console driver be default after @csw is unbound?
3094 *
3095 * To unbind a driver from all possible consoles, pass 0 as @first and
3096 * %MAX_NR_CONSOLES as @last.
3097 *
3098 * @deflt controls whether the console that ends up replacing @csw should be
3099 * the default console.
3100 *
3101 * RETURNS:
3102 * -ENODEV if @csw isn't a registered console driver or can't be unregistered
3103 * or 0 on success.
3104 */
3105 int unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
3106 {
3107 struct module *owner = csw->owner;
3108 const struct consw *defcsw = NULL;
3109 struct con_driver *con_driver = NULL, *con_back = NULL;
3110 int i, retval = -ENODEV;
3111
3112 if (!try_module_get(owner))
3113 return -ENODEV;
3114
3115 acquire_console_sem();
3116
3117 /* check if driver is registered and if it is unbindable */
3118 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3119 con_driver = &registered_con_driver[i];
3120
3121 if (con_driver->con == csw &&
3122 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3123 retval = 0;
3124 break;
3125 }
3126 }
3127
3128 if (retval) {
3129 release_console_sem();
3130 goto err;
3131 }
3132
3133 retval = -ENODEV;
3134
3135 /* check if backup driver exists */
3136 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3137 con_back = &registered_con_driver[i];
3138
3139 if (con_back->con &&
3140 !(con_back->flag & CON_DRIVER_FLAG_MODULE)) {
3141 defcsw = con_back->con;
3142 retval = 0;
3143 break;
3144 }
3145 }
3146
3147 if (retval) {
3148 release_console_sem();
3149 goto err;
3150 }
3151
3152 if (!con_is_bound(csw)) {
3153 release_console_sem();
3154 goto err;
3155 }
3156
3157 first = max(first, con_driver->first);
3158 last = min(last, con_driver->last);
3159
3160 for (i = first; i <= last; i++) {
3161 if (con_driver_map[i] == csw) {
3162 module_put(csw->owner);
3163 con_driver_map[i] = NULL;
3164 }
3165 }
3166
3167 if (!con_is_bound(defcsw)) {
3168 const struct consw *defconsw = conswitchp;
3169
3170 defcsw->con_startup();
3171 con_back->flag |= CON_DRIVER_FLAG_INIT;
3172 /*
3173 * vgacon may change the default driver to point
3174 * to dummycon, we restore it here...
3175 */
3176 conswitchp = defconsw;
3177 }
3178
3179 if (!con_is_bound(csw))
3180 con_driver->flag &= ~CON_DRIVER_FLAG_INIT;
3181
3182 release_console_sem();
3183 /* ignore return value, binding should not fail */
3184 bind_con_driver(defcsw, first, last, deflt);
3185 err:
3186 module_put(owner);
3187 return retval;
3188
3189 }
3190 EXPORT_SYMBOL(unbind_con_driver);
3191
3192 static int vt_bind(struct con_driver *con)
3193 {
3194 const struct consw *defcsw = NULL, *csw = NULL;
3195 int i, more = 1, first = -1, last = -1, deflt = 0;
3196
3197 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3198 con_is_graphics(con->con, con->first, con->last))
3199 goto err;
3200
3201 csw = con->con;
3202
3203 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3204 struct con_driver *con = &registered_con_driver[i];
3205
3206 if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) {
3207 defcsw = con->con;
3208 break;
3209 }
3210 }
3211
3212 if (!defcsw)
3213 goto err;
3214
3215 while (more) {
3216 more = 0;
3217
3218 for (i = con->first; i <= con->last; i++) {
3219 if (con_driver_map[i] == defcsw) {
3220 if (first == -1)
3221 first = i;
3222 last = i;
3223 more = 1;
3224 } else if (first != -1)
3225 break;
3226 }
3227
3228 if (first == 0 && last == MAX_NR_CONSOLES -1)
3229 deflt = 1;
3230
3231 if (first != -1)
3232 bind_con_driver(csw, first, last, deflt);
3233
3234 first = -1;
3235 last = -1;
3236 deflt = 0;
3237 }
3238
3239 err:
3240 return 0;
3241 }
3242
3243 static int vt_unbind(struct con_driver *con)
3244 {
3245 const struct consw *csw = NULL;
3246 int i, more = 1, first = -1, last = -1, deflt = 0;
3247
3248 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3249 con_is_graphics(con->con, con->first, con->last))
3250 goto err;
3251
3252 csw = con->con;
3253
3254 while (more) {
3255 more = 0;
3256
3257 for (i = con->first; i <= con->last; i++) {
3258 if (con_driver_map[i] == csw) {
3259 if (first == -1)
3260 first = i;
3261 last = i;
3262 more = 1;
3263 } else if (first != -1)
3264 break;
3265 }
3266
3267 if (first == 0 && last == MAX_NR_CONSOLES -1)
3268 deflt = 1;
3269
3270 if (first != -1)
3271 unbind_con_driver(csw, first, last, deflt);
3272
3273 first = -1;
3274 last = -1;
3275 deflt = 0;
3276 }
3277
3278 err:
3279 return 0;
3280 }
3281 #else
3282 static inline int vt_bind(struct con_driver *con)
3283 {
3284 return 0;
3285 }
3286 static inline int vt_unbind(struct con_driver *con)
3287 {
3288 return 0;
3289 }
3290 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3291
3292 static ssize_t store_bind(struct device *dev, struct device_attribute *attr,
3293 const char *buf, size_t count)
3294 {
3295 struct con_driver *con = dev_get_drvdata(dev);
3296 int bind = simple_strtoul(buf, NULL, 0);
3297
3298 if (bind)
3299 vt_bind(con);
3300 else
3301 vt_unbind(con);
3302
3303 return count;
3304 }
3305
3306 static ssize_t show_bind(struct device *dev, struct device_attribute *attr,
3307 char *buf)
3308 {
3309 struct con_driver *con = dev_get_drvdata(dev);
3310 int bind = con_is_bound(con->con);
3311
3312 return snprintf(buf, PAGE_SIZE, "%i\n", bind);
3313 }
3314
3315 static ssize_t show_name(struct device *dev, struct device_attribute *attr,
3316 char *buf)
3317 {
3318 struct con_driver *con = dev_get_drvdata(dev);
3319
3320 return snprintf(buf, PAGE_SIZE, "%s %s\n",
3321 (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)",
3322 con->desc);
3323
3324 }
3325
3326 static struct device_attribute device_attrs[] = {
3327 __ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind),
3328 __ATTR(name, S_IRUGO, show_name, NULL),
3329 };
3330
3331 static int vtconsole_init_device(struct con_driver *con)
3332 {
3333 int i;
3334 int error = 0;
3335
3336 con->flag |= CON_DRIVER_FLAG_ATTR;
3337 dev_set_drvdata(con->dev, con);
3338 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3339 error = device_create_file(con->dev, &device_attrs[i]);
3340 if (error)
3341 break;
3342 }
3343
3344 if (error) {
3345 while (--i >= 0)
3346 device_remove_file(con->dev, &device_attrs[i]);
3347 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3348 }
3349
3350 return error;
3351 }
3352
3353 static void vtconsole_deinit_device(struct con_driver *con)
3354 {
3355 int i;
3356
3357 if (con->flag & CON_DRIVER_FLAG_ATTR) {
3358 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3359 device_remove_file(con->dev, &device_attrs[i]);
3360 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3361 }
3362 }
3363
3364 /**
3365 * con_is_bound - checks if driver is bound to the console
3366 * @csw: console driver
3367 *
3368 * RETURNS: zero if unbound, nonzero if bound
3369 *
3370 * Drivers can call this and if zero, they should release
3371 * all resources allocated on con_startup()
3372 */
3373 int con_is_bound(const struct consw *csw)
3374 {
3375 int i, bound = 0;
3376
3377 for (i = 0; i < MAX_NR_CONSOLES; i++) {
3378 if (con_driver_map[i] == csw) {
3379 bound = 1;
3380 break;
3381 }
3382 }
3383
3384 return bound;
3385 }
3386 EXPORT_SYMBOL(con_is_bound);
3387
3388 /**
3389 * register_con_driver - register console driver to console layer
3390 * @csw: console driver
3391 * @first: the first console to take over, minimum value is 0
3392 * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1
3393 *
3394 * DESCRIPTION: This function registers a console driver which can later
3395 * bind to a range of consoles specified by @first and @last. It will
3396 * also initialize the console driver by calling con_startup().
3397 */
3398 int register_con_driver(const struct consw *csw, int first, int last)
3399 {
3400 struct module *owner = csw->owner;
3401 struct con_driver *con_driver;
3402 const char *desc;
3403 int i, retval = 0;
3404
3405 if (!try_module_get(owner))
3406 return -ENODEV;
3407
3408 acquire_console_sem();
3409
3410 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3411 con_driver = &registered_con_driver[i];
3412
3413 /* already registered */
3414 if (con_driver->con == csw)
3415 retval = -EINVAL;
3416 }
3417
3418 if (retval)
3419 goto err;
3420
3421 desc = csw->con_startup();
3422
3423 if (!desc)
3424 goto err;
3425
3426 retval = -EINVAL;
3427
3428 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3429 con_driver = &registered_con_driver[i];
3430
3431 if (con_driver->con == NULL) {
3432 con_driver->con = csw;
3433 con_driver->desc = desc;
3434 con_driver->node = i;
3435 con_driver->flag = CON_DRIVER_FLAG_MODULE |
3436 CON_DRIVER_FLAG_INIT;
3437 con_driver->first = first;
3438 con_driver->last = last;
3439 retval = 0;
3440 break;
3441 }
3442 }
3443
3444 if (retval)
3445 goto err;
3446
3447 con_driver->dev = device_create(vtconsole_class, NULL,
3448 MKDEV(0, con_driver->node),
3449 NULL, "vtcon%i",
3450 con_driver->node);
3451
3452 if (IS_ERR(con_driver->dev)) {
3453 printk(KERN_WARNING "Unable to create device for %s; "
3454 "errno = %ld\n", con_driver->desc,
3455 PTR_ERR(con_driver->dev));
3456 con_driver->dev = NULL;
3457 } else {
3458 vtconsole_init_device(con_driver);
3459 }
3460
3461 err:
3462 release_console_sem();
3463 module_put(owner);
3464 return retval;
3465 }
3466 EXPORT_SYMBOL(register_con_driver);
3467
3468 /**
3469 * unregister_con_driver - unregister console driver from console layer
3470 * @csw: console driver
3471 *
3472 * DESCRIPTION: All drivers that registers to the console layer must
3473 * call this function upon exit, or if the console driver is in a state
3474 * where it won't be able to handle console services, such as the
3475 * framebuffer console without loaded framebuffer drivers.
3476 *
3477 * The driver must unbind first prior to unregistration.
3478 */
3479 int unregister_con_driver(const struct consw *csw)
3480 {
3481 int i, retval = -ENODEV;
3482
3483 acquire_console_sem();
3484
3485 /* cannot unregister a bound driver */
3486 if (con_is_bound(csw))
3487 goto err;
3488
3489 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3490 struct con_driver *con_driver = &registered_con_driver[i];
3491
3492 if (con_driver->con == csw &&
3493 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3494 vtconsole_deinit_device(con_driver);
3495 device_destroy(vtconsole_class,
3496 MKDEV(0, con_driver->node));
3497 con_driver->con = NULL;
3498 con_driver->desc = NULL;
3499 con_driver->dev = NULL;
3500 con_driver->node = 0;
3501 con_driver->flag = 0;
3502 con_driver->first = 0;
3503 con_driver->last = 0;
3504 retval = 0;
3505 break;
3506 }
3507 }
3508 err:
3509 release_console_sem();
3510 return retval;
3511 }
3512 EXPORT_SYMBOL(unregister_con_driver);
3513
3514 /*
3515 * If we support more console drivers, this function is used
3516 * when a driver wants to take over some existing consoles
3517 * and become default driver for newly opened ones.
3518 *
3519 * take_over_console is basically a register followed by unbind
3520 */
3521 int take_over_console(const struct consw *csw, int first, int last, int deflt)
3522 {
3523 int err;
3524
3525 err = register_con_driver(csw, first, last);
3526
3527 if (!err)
3528 bind_con_driver(csw, first, last, deflt);
3529
3530 return err;
3531 }
3532
3533 /*
3534 * give_up_console is a wrapper to unregister_con_driver. It will only
3535 * work if driver is fully unbound.
3536 */
3537 void give_up_console(const struct consw *csw)
3538 {
3539 unregister_con_driver(csw);
3540 }
3541
3542 static int __init vtconsole_class_init(void)
3543 {
3544 int i;
3545
3546 vtconsole_class = class_create(THIS_MODULE, "vtconsole");
3547 if (IS_ERR(vtconsole_class)) {
3548 printk(KERN_WARNING "Unable to create vt console class; "
3549 "errno = %ld\n", PTR_ERR(vtconsole_class));
3550 vtconsole_class = NULL;
3551 }
3552
3553 /* Add system drivers to sysfs */
3554 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3555 struct con_driver *con = &registered_con_driver[i];
3556
3557 if (con->con && !con->dev) {
3558 con->dev = device_create(vtconsole_class, NULL,
3559 MKDEV(0, con->node),
3560 NULL, "vtcon%i",
3561 con->node);
3562
3563 if (IS_ERR(con->dev)) {
3564 printk(KERN_WARNING "Unable to create "
3565 "device for %s; errno = %ld\n",
3566 con->desc, PTR_ERR(con->dev));
3567 con->dev = NULL;
3568 } else {
3569 vtconsole_init_device(con);
3570 }
3571 }
3572 }
3573
3574 return 0;
3575 }
3576 postcore_initcall(vtconsole_class_init);
3577
3578 #endif
3579
3580 /*
3581 * Screen blanking
3582 */
3583
3584 static int set_vesa_blanking(char __user *p)
3585 {
3586 unsigned int mode;
3587
3588 if (get_user(mode, p + 1))
3589 return -EFAULT;
3590
3591 vesa_blank_mode = (mode < 4) ? mode : 0;
3592 return 0;
3593 }
3594
3595 void do_blank_screen(int entering_gfx)
3596 {
3597 struct vc_data *vc = vc_cons[fg_console].d;
3598 int i;
3599
3600 WARN_CONSOLE_UNLOCKED();
3601
3602 if (console_blanked) {
3603 if (blank_state == blank_vesa_wait) {
3604 blank_state = blank_off;
3605 vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0);
3606 }
3607 return;
3608 }
3609
3610 /* entering graphics mode? */
3611 if (entering_gfx) {
3612 hide_cursor(vc);
3613 save_screen(vc);
3614 vc->vc_sw->con_blank(vc, -1, 1);
3615 console_blanked = fg_console + 1;
3616 blank_state = blank_off;
3617 set_origin(vc);
3618 return;
3619 }
3620
3621 if (blank_state != blank_normal_wait)
3622 return;
3623 blank_state = blank_off;
3624
3625 /* don't blank graphics */
3626 if (vc->vc_mode != KD_TEXT) {
3627 console_blanked = fg_console + 1;
3628 return;
3629 }
3630
3631 hide_cursor(vc);
3632 del_timer_sync(&console_timer);
3633 blank_timer_expired = 0;
3634
3635 save_screen(vc);
3636 /* In case we need to reset origin, blanking hook returns 1 */
3637 i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0);
3638 console_blanked = fg_console + 1;
3639 if (i)
3640 set_origin(vc);
3641
3642 if (console_blank_hook && console_blank_hook(1))
3643 return;
3644
3645 if (vesa_off_interval && vesa_blank_mode) {
3646 blank_state = blank_vesa_wait;
3647 mod_timer(&console_timer, jiffies + vesa_off_interval);
3648 }
3649 }
3650 EXPORT_SYMBOL(do_blank_screen);
3651
3652 /*
3653 * Called by timer as well as from vt_console_driver
3654 */
3655 void do_unblank_screen(int leaving_gfx)
3656 {
3657 struct vc_data *vc;
3658
3659 /* This should now always be called from a "sane" (read: can schedule)
3660 * context for the sake of the low level drivers, except in the special
3661 * case of oops_in_progress
3662 */
3663 if (!oops_in_progress)
3664 might_sleep();
3665
3666 WARN_CONSOLE_UNLOCKED();
3667
3668 ignore_poke = 0;
3669 if (!console_blanked)
3670 return;
3671 if (!vc_cons_allocated(fg_console)) {
3672 /* impossible */
3673 printk("unblank_screen: tty %d not allocated ??\n", fg_console+1);
3674 return;
3675 }
3676 vc = vc_cons[fg_console].d;
3677 if (vc->vc_mode != KD_TEXT)
3678 return; /* but leave console_blanked != 0 */
3679
3680 if (blankinterval) {
3681 mod_timer(&console_timer, jiffies + blankinterval);
3682 blank_state = blank_normal_wait;
3683 }
3684
3685 console_blanked = 0;
3686 if (vc->vc_sw->con_blank(vc, 0, leaving_gfx))
3687 /* Low-level driver cannot restore -> do it ourselves */
3688 update_screen(vc);
3689 if (console_blank_hook)
3690 console_blank_hook(0);
3691 set_palette(vc);
3692 set_cursor(vc);
3693 }
3694 EXPORT_SYMBOL(do_unblank_screen);
3695
3696 /*
3697 * This is called by the outside world to cause a forced unblank, mostly for
3698 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
3699 * call it with 1 as an argument and so force a mode restore... that may kill
3700 * X or at least garbage the screen but would also make the Oops visible...
3701 */
3702 void unblank_screen(void)
3703 {
3704 do_unblank_screen(0);
3705 }
3706
3707 /*
3708 * We defer the timer blanking to work queue so it can take the console mutex
3709 * (console operations can still happen at irq time, but only from printk which
3710 * has the console mutex. Not perfect yet, but better than no locking
3711 */
3712 static void blank_screen_t(unsigned long dummy)
3713 {
3714 if (unlikely(!keventd_up())) {
3715 mod_timer(&console_timer, jiffies + blankinterval);
3716 return;
3717 }
3718 blank_timer_expired = 1;
3719 schedule_work(&console_work);
3720 }
3721
3722 void poke_blanked_console(void)
3723 {
3724 WARN_CONSOLE_UNLOCKED();
3725
3726 /* Add this so we quickly catch whoever might call us in a non
3727 * safe context. Nowadays, unblank_screen() isn't to be called in
3728 * atomic contexts and is allowed to schedule (with the special case
3729 * of oops_in_progress, but that isn't of any concern for this
3730 * function. --BenH.
3731 */
3732 might_sleep();
3733
3734 /* This isn't perfectly race free, but a race here would be mostly harmless,
3735 * at worse, we'll do a spurrious blank and it's unlikely
3736 */
3737 del_timer(&console_timer);
3738 blank_timer_expired = 0;
3739
3740 if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS)
3741 return;
3742 if (console_blanked)
3743 unblank_screen();
3744 else if (blankinterval) {
3745 mod_timer(&console_timer, jiffies + blankinterval);
3746 blank_state = blank_normal_wait;
3747 }
3748 }
3749
3750 /*
3751 * Palettes
3752 */
3753
3754 static void set_palette(struct vc_data *vc)
3755 {
3756 WARN_CONSOLE_UNLOCKED();
3757
3758 if (vc->vc_mode != KD_GRAPHICS)
3759 vc->vc_sw->con_set_palette(vc, color_table);
3760 }
3761
3762 static int set_get_cmap(unsigned char __user *arg, int set)
3763 {
3764 int i, j, k;
3765
3766 WARN_CONSOLE_UNLOCKED();
3767
3768 for (i = 0; i < 16; i++)
3769 if (set) {
3770 get_user(default_red[i], arg++);
3771 get_user(default_grn[i], arg++);
3772 get_user(default_blu[i], arg++);
3773 } else {
3774 put_user(default_red[i], arg++);
3775 put_user(default_grn[i], arg++);
3776 put_user(default_blu[i], arg++);
3777 }
3778 if (set) {
3779 for (i = 0; i < MAX_NR_CONSOLES; i++)
3780 if (vc_cons_allocated(i)) {
3781 for (j = k = 0; j < 16; j++) {
3782 vc_cons[i].d->vc_palette[k++] = default_red[j];
3783 vc_cons[i].d->vc_palette[k++] = default_grn[j];
3784 vc_cons[i].d->vc_palette[k++] = default_blu[j];
3785 }
3786 set_palette(vc_cons[i].d);
3787 }
3788 }
3789 return 0;
3790 }
3791
3792 /*
3793 * Load palette into the DAC registers. arg points to a colour
3794 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
3795 */
3796
3797 int con_set_cmap(unsigned char __user *arg)
3798 {
3799 int rc;
3800
3801 acquire_console_sem();
3802 rc = set_get_cmap (arg,1);
3803 release_console_sem();
3804
3805 return rc;
3806 }
3807
3808 int con_get_cmap(unsigned char __user *arg)
3809 {
3810 int rc;
3811
3812 acquire_console_sem();
3813 rc = set_get_cmap (arg,0);
3814 release_console_sem();
3815
3816 return rc;
3817 }
3818
3819 void reset_palette(struct vc_data *vc)
3820 {
3821 int j, k;
3822 for (j=k=0; j<16; j++) {
3823 vc->vc_palette[k++] = default_red[j];
3824 vc->vc_palette[k++] = default_grn[j];
3825 vc->vc_palette[k++] = default_blu[j];
3826 }
3827 set_palette(vc);
3828 }
3829
3830 /*
3831 * Font switching
3832 *
3833 * Currently we only support fonts up to 32 pixels wide, at a maximum height
3834 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
3835 * depending on width) reserved for each character which is kinda wasty, but
3836 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
3837 * is upto the actual low-level console-driver convert data into its favorite
3838 * format (maybe we should add a `fontoffset' field to the `display'
3839 * structure so we won't have to convert the fontdata all the time.
3840 * /Jes
3841 */
3842
3843 #define max_font_size 65536
3844
3845 static int con_font_get(struct vc_data *vc, struct console_font_op *op)
3846 {
3847 struct console_font font;
3848 int rc = -EINVAL;
3849 int c;
3850
3851 if (vc->vc_mode != KD_TEXT)
3852 return -EINVAL;
3853
3854 if (op->data) {
3855 font.data = kmalloc(max_font_size, GFP_KERNEL);
3856 if (!font.data)
3857 return -ENOMEM;
3858 } else
3859 font.data = NULL;
3860
3861 acquire_console_sem();
3862 if (vc->vc_sw->con_font_get)
3863 rc = vc->vc_sw->con_font_get(vc, &font);
3864 else
3865 rc = -ENOSYS;
3866 release_console_sem();
3867
3868 if (rc)
3869 goto out;
3870
3871 c = (font.width+7)/8 * 32 * font.charcount;
3872
3873 if (op->data && font.charcount > op->charcount)
3874 rc = -ENOSPC;
3875 if (!(op->flags & KD_FONT_FLAG_OLD)) {
3876 if (font.width > op->width || font.height > op->height)
3877 rc = -ENOSPC;
3878 } else {
3879 if (font.width != 8)
3880 rc = -EIO;
3881 else if ((op->height && font.height > op->height) ||
3882 font.height > 32)
3883 rc = -ENOSPC;
3884 }
3885 if (rc)
3886 goto out;
3887
3888 op->height = font.height;
3889 op->width = font.width;
3890 op->charcount = font.charcount;
3891
3892 if (op->data && copy_to_user(op->data, font.data, c))
3893 rc = -EFAULT;
3894
3895 out:
3896 kfree(font.data);
3897 return rc;
3898 }
3899
3900 static int con_font_set(struct vc_data *vc, struct console_font_op *op)
3901 {
3902 struct console_font font;
3903 int rc = -EINVAL;
3904 int size;
3905
3906 if (vc->vc_mode != KD_TEXT)
3907 return -EINVAL;
3908 if (!op->data)
3909 return -EINVAL;
3910 if (op->charcount > 512)
3911 return -EINVAL;
3912 if (!op->height) { /* Need to guess font height [compat] */
3913 int h, i;
3914 u8 __user *charmap = op->data;
3915 u8 tmp;
3916
3917 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
3918 so that we can get rid of this soon */
3919 if (!(op->flags & KD_FONT_FLAG_OLD))
3920 return -EINVAL;
3921 for (h = 32; h > 0; h--)
3922 for (i = 0; i < op->charcount; i++) {
3923 if (get_user(tmp, &charmap[32*i+h-1]))
3924 return -EFAULT;
3925 if (tmp)
3926 goto nonzero;
3927 }
3928 return -EINVAL;
3929 nonzero:
3930 op->height = h;
3931 }
3932 if (op->width <= 0 || op->width > 32 || op->height > 32)
3933 return -EINVAL;
3934 size = (op->width+7)/8 * 32 * op->charcount;
3935 if (size > max_font_size)
3936 return -ENOSPC;
3937 font.charcount = op->charcount;
3938 font.height = op->height;
3939 font.width = op->width;
3940 font.data = kmalloc(size, GFP_KERNEL);
3941 if (!font.data)
3942 return -ENOMEM;
3943 if (copy_from_user(font.data, op->data, size)) {
3944 kfree(font.data);
3945 return -EFAULT;
3946 }
3947 acquire_console_sem();
3948 if (vc->vc_sw->con_font_set)
3949 rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
3950 else
3951 rc = -ENOSYS;
3952 release_console_sem();
3953 kfree(font.data);
3954 return rc;
3955 }
3956
3957 static int con_font_default(struct vc_data *vc, struct console_font_op *op)
3958 {
3959 struct console_font font = {.width = op->width, .height = op->height};
3960 char name[MAX_FONT_NAME];
3961 char *s = name;
3962 int rc;
3963
3964 if (vc->vc_mode != KD_TEXT)
3965 return -EINVAL;
3966
3967 if (!op->data)
3968 s = NULL;
3969 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0)
3970 return -EFAULT;
3971 else
3972 name[MAX_FONT_NAME - 1] = 0;
3973
3974 acquire_console_sem();
3975 if (vc->vc_sw->con_font_default)
3976 rc = vc->vc_sw->con_font_default(vc, &font, s);
3977 else
3978 rc = -ENOSYS;
3979 release_console_sem();
3980 if (!rc) {
3981 op->width = font.width;
3982 op->height = font.height;
3983 }
3984 return rc;
3985 }
3986
3987 static int con_font_copy(struct vc_data *vc, struct console_font_op *op)
3988 {
3989 int con = op->height;
3990 int rc;
3991
3992 if (vc->vc_mode != KD_TEXT)
3993 return -EINVAL;
3994
3995 acquire_console_sem();
3996 if (!vc->vc_sw->con_font_copy)
3997 rc = -ENOSYS;
3998 else if (con < 0 || !vc_cons_allocated(con))
3999 rc = -ENOTTY;
4000 else if (con == vc->vc_num) /* nothing to do */
4001 rc = 0;
4002 else
4003 rc = vc->vc_sw->con_font_copy(vc, con);
4004 release_console_sem();
4005 return rc;
4006 }
4007
4008 int con_font_op(struct vc_data *vc, struct console_font_op *op)
4009 {
4010 switch (op->op) {
4011 case KD_FONT_OP_SET:
4012 return con_font_set(vc, op);
4013 case KD_FONT_OP_GET:
4014 return con_font_get(vc, op);
4015 case KD_FONT_OP_SET_DEFAULT:
4016 return con_font_default(vc, op);
4017 case KD_FONT_OP_COPY:
4018 return con_font_copy(vc, op);
4019 }
4020 return -ENOSYS;
4021 }
4022
4023 /*
4024 * Interface exported to selection and vcs.
4025 */
4026
4027 /* used by selection */
4028 u16 screen_glyph(struct vc_data *vc, int offset)
4029 {
4030 u16 w = scr_readw(screenpos(vc, offset, 1));
4031 u16 c = w & 0xff;
4032
4033 if (w & vc->vc_hi_font_mask)
4034 c |= 0x100;
4035 return c;
4036 }
4037 EXPORT_SYMBOL_GPL(screen_glyph);
4038
4039 /* used by vcs - note the word offset */
4040 unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed)
4041 {
4042 return screenpos(vc, 2 * w_offset, viewed);
4043 }
4044
4045 void getconsxy(struct vc_data *vc, unsigned char *p)
4046 {
4047 p[0] = vc->vc_x;
4048 p[1] = vc->vc_y;
4049 }
4050
4051 void putconsxy(struct vc_data *vc, unsigned char *p)
4052 {
4053 hide_cursor(vc);
4054 gotoxy(vc, p[0], p[1]);
4055 set_cursor(vc);
4056 }
4057
4058 u16 vcs_scr_readw(struct vc_data *vc, const u16 *org)
4059 {
4060 if ((unsigned long)org == vc->vc_pos && softcursor_original != -1)
4061 return softcursor_original;
4062 return scr_readw(org);
4063 }
4064
4065 void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org)
4066 {
4067 scr_writew(val, org);
4068 if ((unsigned long)org == vc->vc_pos) {
4069 softcursor_original = -1;
4070 add_softcursor(vc);
4071 }
4072 }
4073
4074 /*
4075 * Visible symbols for modules
4076 */
4077
4078 EXPORT_SYMBOL(color_table);
4079 EXPORT_SYMBOL(default_red);
4080 EXPORT_SYMBOL(default_grn);
4081 EXPORT_SYMBOL(default_blu);
4082 EXPORT_SYMBOL(update_region);
4083 EXPORT_SYMBOL(redraw_screen);
4084 EXPORT_SYMBOL(vc_resize);
4085 EXPORT_SYMBOL(fg_console);
4086 EXPORT_SYMBOL(console_blank_hook);
4087 EXPORT_SYMBOL(console_blanked);
4088 EXPORT_SYMBOL(vc_cons);
4089 #ifndef VT_SINGLE_DRIVER
4090 EXPORT_SYMBOL(take_over_console);
4091 EXPORT_SYMBOL(give_up_console);
4092 #endif
linux-next