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Pull bugzilla-5737 into release branch
[deliverable/linux.git] / drivers / char / vt.c
1 /*
2 * linux/drivers/char/vt.c
3 *
4 * Copyright (C) 1991, 1992 Linus Torvalds
5 */
6
7 /*
8 * Hopefully this will be a rather complete VT102 implementation.
9 *
10 * Beeping thanks to John T Kohl.
11 *
12 * Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics
13 * Chars, and VT100 enhancements by Peter MacDonald.
14 *
15 * Copy and paste function by Andrew Haylett,
16 * some enhancements by Alessandro Rubini.
17 *
18 * Code to check for different video-cards mostly by Galen Hunt,
19 * <g-hunt@ee.utah.edu>
20 *
21 * Rudimentary ISO 10646/Unicode/UTF-8 character set support by
22 * Markus Kuhn, <mskuhn@immd4.informatik.uni-erlangen.de>.
23 *
24 * Dynamic allocation of consoles, aeb@cwi.nl, May 1994
25 * Resizing of consoles, aeb, 940926
26 *
27 * Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94
28 * <poe@daimi.aau.dk>
29 *
30 * User-defined bell sound, new setterm control sequences and printk
31 * redirection by Martin Mares <mj@k332.feld.cvut.cz> 19-Nov-95
32 *
33 * APM screenblank bug fixed Takashi Manabe <manabe@roy.dsl.tutics.tut.jp>
34 *
35 * Merge with the abstract console driver by Geert Uytterhoeven
36 * <geert@linux-m68k.org>, Jan 1997.
37 *
38 * Original m68k console driver modifications by
39 *
40 * - Arno Griffioen <arno@usn.nl>
41 * - David Carter <carter@cs.bris.ac.uk>
42 *
43 * The abstract console driver provides a generic interface for a text
44 * console. It supports VGA text mode, frame buffer based graphical consoles
45 * and special graphics processors that are only accessible through some
46 * registers (e.g. a TMS340x0 GSP).
47 *
48 * The interface to the hardware is specified using a special structure
49 * (struct consw) which contains function pointers to console operations
50 * (see <linux/console.h> for more information).
51 *
52 * Support for changeable cursor shape
53 * by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997
54 *
55 * Ported to i386 and con_scrolldelta fixed
56 * by Emmanuel Marty <core@ggi-project.org>, April 1998
57 *
58 * Resurrected character buffers in videoram plus lots of other trickery
59 * by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998
60 *
61 * Removed old-style timers, introduced console_timer, made timer
62 * deletion SMP-safe. 17Jun00, Andrew Morton <andrewm@uow.edu.au>
63 *
64 * Removed console_lock, enabled interrupts across all console operations
65 * 13 March 2001, Andrew Morton
66 */
67
68 #include <linux/module.h>
69 #include <linux/types.h>
70 #include <linux/sched.h>
71 #include <linux/tty.h>
72 #include <linux/tty_flip.h>
73 #include <linux/kernel.h>
74 #include <linux/string.h>
75 #include <linux/errno.h>
76 #include <linux/kd.h>
77 #include <linux/slab.h>
78 #include <linux/major.h>
79 #include <linux/mm.h>
80 #include <linux/console.h>
81 #include <linux/init.h>
82 #include <linux/devfs_fs_kernel.h>
83 #include <linux/vt_kern.h>
84 #include <linux/selection.h>
85 #include <linux/tiocl.h>
86 #include <linux/kbd_kern.h>
87 #include <linux/consolemap.h>
88 #include <linux/timer.h>
89 #include <linux/interrupt.h>
90 #include <linux/config.h>
91 #include <linux/workqueue.h>
92 #include <linux/bootmem.h>
93 #include <linux/pm.h>
94 #include <linux/font.h>
95 #include <linux/bitops.h>
96
97 #include <asm/io.h>
98 #include <asm/system.h>
99 #include <asm/uaccess.h>
100
101 #define MAX_NR_CON_DRIVER 16
102
103 #define CON_DRIVER_FLAG_MODULE 1
104 #define CON_DRIVER_FLAG_INIT 2
105
106 struct con_driver {
107 const struct consw *con;
108 const char *desc;
109 struct class_device *class_dev;
110 int node;
111 int first;
112 int last;
113 int flag;
114 };
115
116 static struct con_driver registered_con_driver[MAX_NR_CON_DRIVER];
117 const struct consw *conswitchp;
118
119 /* A bitmap for codes <32. A bit of 1 indicates that the code
120 * corresponding to that bit number invokes some special action
121 * (such as cursor movement) and should not be displayed as a
122 * glyph unless the disp_ctrl mode is explicitly enabled.
123 */
124 #define CTRL_ACTION 0x0d00ff81
125 #define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */
126
127 /*
128 * Here is the default bell parameters: 750HZ, 1/8th of a second
129 */
130 #define DEFAULT_BELL_PITCH 750
131 #define DEFAULT_BELL_DURATION (HZ/8)
132
133 extern void vcs_make_devfs(struct tty_struct *tty);
134 extern void vcs_remove_devfs(struct tty_struct *tty);
135
136 extern void console_map_init(void);
137 #ifdef CONFIG_PROM_CONSOLE
138 extern void prom_con_init(void);
139 #endif
140 #ifdef CONFIG_MDA_CONSOLE
141 extern int mda_console_init(void);
142 #endif
143
144 struct vc vc_cons [MAX_NR_CONSOLES];
145
146 #ifndef VT_SINGLE_DRIVER
147 static const struct consw *con_driver_map[MAX_NR_CONSOLES];
148 #endif
149
150 static int con_open(struct tty_struct *, struct file *);
151 static void vc_init(struct vc_data *vc, unsigned int rows,
152 unsigned int cols, int do_clear);
153 static void gotoxy(struct vc_data *vc, int new_x, int new_y);
154 static void save_cur(struct vc_data *vc);
155 static void reset_terminal(struct vc_data *vc, int do_clear);
156 static void con_flush_chars(struct tty_struct *tty);
157 static void set_vesa_blanking(char __user *p);
158 static void set_cursor(struct vc_data *vc);
159 static void hide_cursor(struct vc_data *vc);
160 static void console_callback(void *ignored);
161 static void blank_screen_t(unsigned long dummy);
162 static void set_palette(struct vc_data *vc);
163
164 static int printable; /* Is console ready for printing? */
165
166 /*
167 * ignore_poke: don't unblank the screen when things are typed. This is
168 * mainly for the privacy of braille terminal users.
169 */
170 static int ignore_poke;
171
172 int do_poke_blanked_console;
173 int console_blanked;
174
175 static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
176 static int blankinterval = 10*60*HZ;
177 static int vesa_off_interval;
178
179 static DECLARE_WORK(console_work, console_callback, NULL);
180
181 /*
182 * fg_console is the current virtual console,
183 * last_console is the last used one,
184 * want_console is the console we want to switch to,
185 * kmsg_redirect is the console for kernel messages,
186 */
187 int fg_console;
188 int last_console;
189 int want_console = -1;
190 int kmsg_redirect;
191
192 /*
193 * For each existing display, we have a pointer to console currently visible
194 * on that display, allowing consoles other than fg_console to be refreshed
195 * appropriately. Unless the low-level driver supplies its own display_fg
196 * variable, we use this one for the "master display".
197 */
198 static struct vc_data *master_display_fg;
199
200 /*
201 * Unfortunately, we need to delay tty echo when we're currently writing to the
202 * console since the code is (and always was) not re-entrant, so we schedule
203 * all flip requests to process context with schedule-task() and run it from
204 * console_callback().
205 */
206
207 /*
208 * For the same reason, we defer scrollback to the console callback.
209 */
210 static int scrollback_delta;
211
212 /*
213 * Hook so that the power management routines can (un)blank
214 * the console on our behalf.
215 */
216 int (*console_blank_hook)(int);
217
218 static struct timer_list console_timer;
219 static int blank_state;
220 static int blank_timer_expired;
221 enum {
222 blank_off = 0,
223 blank_normal_wait,
224 blank_vesa_wait,
225 };
226
227 /*
228 * Low-Level Functions
229 */
230
231 #define IS_FG(vc) ((vc)->vc_num == fg_console)
232
233 #ifdef VT_BUF_VRAM_ONLY
234 #define DO_UPDATE(vc) 0
235 #else
236 #define DO_UPDATE(vc) CON_IS_VISIBLE(vc)
237 #endif
238
239 static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed)
240 {
241 unsigned short *p;
242
243 if (!viewed)
244 p = (unsigned short *)(vc->vc_origin + offset);
245 else if (!vc->vc_sw->con_screen_pos)
246 p = (unsigned short *)(vc->vc_visible_origin + offset);
247 else
248 p = vc->vc_sw->con_screen_pos(vc, offset);
249 return p;
250 }
251
252 static inline void scrolldelta(int lines)
253 {
254 scrollback_delta += lines;
255 schedule_console_callback();
256 }
257
258 void schedule_console_callback(void)
259 {
260 schedule_work(&console_work);
261 }
262
263 static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
264 {
265 unsigned short *d, *s;
266
267 if (t+nr >= b)
268 nr = b - t - 1;
269 if (b > vc->vc_rows || t >= b || nr < 1)
270 return;
271 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr))
272 return;
273 d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
274 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr));
275 scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row);
276 scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_video_erase_char,
277 vc->vc_size_row * nr);
278 }
279
280 static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
281 {
282 unsigned short *s;
283 unsigned int step;
284
285 if (t+nr >= b)
286 nr = b - t - 1;
287 if (b > vc->vc_rows || t >= b || nr < 1)
288 return;
289 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr))
290 return;
291 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
292 step = vc->vc_cols * nr;
293 scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row);
294 scr_memsetw(s, vc->vc_video_erase_char, 2 * step);
295 }
296
297 static void do_update_region(struct vc_data *vc, unsigned long start, int count)
298 {
299 #ifndef VT_BUF_VRAM_ONLY
300 unsigned int xx, yy, offset;
301 u16 *p;
302
303 p = (u16 *) start;
304 if (!vc->vc_sw->con_getxy) {
305 offset = (start - vc->vc_origin) / 2;
306 xx = offset % vc->vc_cols;
307 yy = offset / vc->vc_cols;
308 } else {
309 int nxx, nyy;
310 start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy);
311 xx = nxx; yy = nyy;
312 }
313 for(;;) {
314 u16 attrib = scr_readw(p) & 0xff00;
315 int startx = xx;
316 u16 *q = p;
317 while (xx < vc->vc_cols && count) {
318 if (attrib != (scr_readw(p) & 0xff00)) {
319 if (p > q)
320 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
321 startx = xx;
322 q = p;
323 attrib = scr_readw(p) & 0xff00;
324 }
325 p++;
326 xx++;
327 count--;
328 }
329 if (p > q)
330 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
331 if (!count)
332 break;
333 xx = 0;
334 yy++;
335 if (vc->vc_sw->con_getxy) {
336 p = (u16 *)start;
337 start = vc->vc_sw->con_getxy(vc, start, NULL, NULL);
338 }
339 }
340 #endif
341 }
342
343 void update_region(struct vc_data *vc, unsigned long start, int count)
344 {
345 WARN_CONSOLE_UNLOCKED();
346
347 if (DO_UPDATE(vc)) {
348 hide_cursor(vc);
349 do_update_region(vc, start, count);
350 set_cursor(vc);
351 }
352 }
353
354 /* Structure of attributes is hardware-dependent */
355
356 static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink, u8 _underline, u8 _reverse)
357 {
358 if (vc->vc_sw->con_build_attr)
359 return vc->vc_sw->con_build_attr(vc, _color, _intensity, _blink, _underline, _reverse);
360
361 #ifndef VT_BUF_VRAM_ONLY
362 /*
363 * ++roman: I completely changed the attribute format for monochrome
364 * mode (!can_do_color). The formerly used MDA (monochrome display
365 * adapter) format didn't allow the combination of certain effects.
366 * Now the attribute is just a bit vector:
367 * Bit 0..1: intensity (0..2)
368 * Bit 2 : underline
369 * Bit 3 : reverse
370 * Bit 7 : blink
371 */
372 {
373 u8 a = vc->vc_color;
374 if (!vc->vc_can_do_color)
375 return _intensity |
376 (_underline ? 4 : 0) |
377 (_reverse ? 8 : 0) |
378 (_blink ? 0x80 : 0);
379 if (_underline)
380 a = (a & 0xf0) | vc->vc_ulcolor;
381 else if (_intensity == 0)
382 a = (a & 0xf0) | vc->vc_ulcolor;
383 if (_reverse)
384 a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77);
385 if (_blink)
386 a ^= 0x80;
387 if (_intensity == 2)
388 a ^= 0x08;
389 if (vc->vc_hi_font_mask == 0x100)
390 a <<= 1;
391 return a;
392 }
393 #else
394 return 0;
395 #endif
396 }
397
398 static void update_attr(struct vc_data *vc)
399 {
400 vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity, vc->vc_blink, vc->vc_underline, vc->vc_reverse ^ vc->vc_decscnm);
401 vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm) << 8) | ' ';
402 }
403
404 /* Note: inverting the screen twice should revert to the original state */
405 void invert_screen(struct vc_data *vc, int offset, int count, int viewed)
406 {
407 unsigned short *p;
408
409 WARN_CONSOLE_UNLOCKED();
410
411 count /= 2;
412 p = screenpos(vc, offset, viewed);
413 if (vc->vc_sw->con_invert_region)
414 vc->vc_sw->con_invert_region(vc, p, count);
415 #ifndef VT_BUF_VRAM_ONLY
416 else {
417 u16 *q = p;
418 int cnt = count;
419 u16 a;
420
421 if (!vc->vc_can_do_color) {
422 while (cnt--) {
423 a = scr_readw(q);
424 a ^= 0x0800;
425 scr_writew(a, q);
426 q++;
427 }
428 } else if (vc->vc_hi_font_mask == 0x100) {
429 while (cnt--) {
430 a = scr_readw(q);
431 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4);
432 scr_writew(a, q);
433 q++;
434 }
435 } else {
436 while (cnt--) {
437 a = scr_readw(q);
438 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4);
439 scr_writew(a, q);
440 q++;
441 }
442 }
443 }
444 #endif
445 if (DO_UPDATE(vc))
446 do_update_region(vc, (unsigned long) p, count);
447 }
448
449 /* used by selection: complement pointer position */
450 void complement_pos(struct vc_data *vc, int offset)
451 {
452 static int old_offset = -1;
453 static unsigned short old;
454 static unsigned short oldx, oldy;
455
456 WARN_CONSOLE_UNLOCKED();
457
458 if (old_offset != -1 && old_offset >= 0 &&
459 old_offset < vc->vc_screenbuf_size) {
460 scr_writew(old, screenpos(vc, old_offset, 1));
461 if (DO_UPDATE(vc))
462 vc->vc_sw->con_putc(vc, old, oldy, oldx);
463 }
464
465 old_offset = offset;
466
467 if (offset != -1 && offset >= 0 &&
468 offset < vc->vc_screenbuf_size) {
469 unsigned short new;
470 unsigned short *p;
471 p = screenpos(vc, offset, 1);
472 old = scr_readw(p);
473 new = old ^ vc->vc_complement_mask;
474 scr_writew(new, p);
475 if (DO_UPDATE(vc)) {
476 oldx = (offset >> 1) % vc->vc_cols;
477 oldy = (offset >> 1) / vc->vc_cols;
478 vc->vc_sw->con_putc(vc, new, oldy, oldx);
479 }
480 }
481
482 }
483
484 static void insert_char(struct vc_data *vc, unsigned int nr)
485 {
486 unsigned short *p, *q = (unsigned short *)vc->vc_pos;
487
488 p = q + vc->vc_cols - nr - vc->vc_x;
489 while (--p >= q)
490 scr_writew(scr_readw(p), p + nr);
491 scr_memsetw(q, vc->vc_video_erase_char, nr * 2);
492 vc->vc_need_wrap = 0;
493 if (DO_UPDATE(vc)) {
494 unsigned short oldattr = vc->vc_attr;
495 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x, vc->vc_y, vc->vc_x + nr, 1,
496 vc->vc_cols - vc->vc_x - nr);
497 vc->vc_attr = vc->vc_video_erase_char >> 8;
498 while (nr--)
499 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y, vc->vc_x + nr);
500 vc->vc_attr = oldattr;
501 }
502 }
503
504 static void delete_char(struct vc_data *vc, unsigned int nr)
505 {
506 unsigned int i = vc->vc_x;
507 unsigned short *p = (unsigned short *)vc->vc_pos;
508
509 while (++i <= vc->vc_cols - nr) {
510 scr_writew(scr_readw(p+nr), p);
511 p++;
512 }
513 scr_memsetw(p, vc->vc_video_erase_char, nr * 2);
514 vc->vc_need_wrap = 0;
515 if (DO_UPDATE(vc)) {
516 unsigned short oldattr = vc->vc_attr;
517 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x + nr, vc->vc_y, vc->vc_x, 1,
518 vc->vc_cols - vc->vc_x - nr);
519 vc->vc_attr = vc->vc_video_erase_char >> 8;
520 while (nr--)
521 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y,
522 vc->vc_cols - 1 - nr);
523 vc->vc_attr = oldattr;
524 }
525 }
526
527 static int softcursor_original;
528
529 static void add_softcursor(struct vc_data *vc)
530 {
531 int i = scr_readw((u16 *) vc->vc_pos);
532 u32 type = vc->vc_cursor_type;
533
534 if (! (type & 0x10)) return;
535 if (softcursor_original != -1) return;
536 softcursor_original = i;
537 i |= ((type >> 8) & 0xff00 );
538 i ^= ((type) & 0xff00 );
539 if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000;
540 if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700;
541 scr_writew(i, (u16 *) vc->vc_pos);
542 if (DO_UPDATE(vc))
543 vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x);
544 }
545
546 static void hide_softcursor(struct vc_data *vc)
547 {
548 if (softcursor_original != -1) {
549 scr_writew(softcursor_original, (u16 *)vc->vc_pos);
550 if (DO_UPDATE(vc))
551 vc->vc_sw->con_putc(vc, softcursor_original,
552 vc->vc_y, vc->vc_x);
553 softcursor_original = -1;
554 }
555 }
556
557 static void hide_cursor(struct vc_data *vc)
558 {
559 if (vc == sel_cons)
560 clear_selection();
561 vc->vc_sw->con_cursor(vc, CM_ERASE);
562 hide_softcursor(vc);
563 }
564
565 static void set_cursor(struct vc_data *vc)
566 {
567 if (!IS_FG(vc) || console_blanked ||
568 vc->vc_mode == KD_GRAPHICS)
569 return;
570 if (vc->vc_deccm) {
571 if (vc == sel_cons)
572 clear_selection();
573 add_softcursor(vc);
574 if ((vc->vc_cursor_type & 0x0f) != 1)
575 vc->vc_sw->con_cursor(vc, CM_DRAW);
576 } else
577 hide_cursor(vc);
578 }
579
580 static void set_origin(struct vc_data *vc)
581 {
582 WARN_CONSOLE_UNLOCKED();
583
584 if (!CON_IS_VISIBLE(vc) ||
585 !vc->vc_sw->con_set_origin ||
586 !vc->vc_sw->con_set_origin(vc))
587 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
588 vc->vc_visible_origin = vc->vc_origin;
589 vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size;
590 vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x;
591 }
592
593 static inline void save_screen(struct vc_data *vc)
594 {
595 WARN_CONSOLE_UNLOCKED();
596
597 if (vc->vc_sw->con_save_screen)
598 vc->vc_sw->con_save_screen(vc);
599 }
600
601 /*
602 * Redrawing of screen
603 */
604
605 static void clear_buffer_attributes(struct vc_data *vc)
606 {
607 unsigned short *p = (unsigned short *)vc->vc_origin;
608 int count = vc->vc_screenbuf_size / 2;
609 int mask = vc->vc_hi_font_mask | 0xff;
610
611 for (; count > 0; count--, p++) {
612 scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p);
613 }
614 }
615
616 void redraw_screen(struct vc_data *vc, int is_switch)
617 {
618 int redraw = 0;
619
620 WARN_CONSOLE_UNLOCKED();
621
622 if (!vc) {
623 /* strange ... */
624 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
625 return;
626 }
627
628 if (is_switch) {
629 struct vc_data *old_vc = vc_cons[fg_console].d;
630 if (old_vc == vc)
631 return;
632 if (!CON_IS_VISIBLE(vc))
633 redraw = 1;
634 *vc->vc_display_fg = vc;
635 fg_console = vc->vc_num;
636 hide_cursor(old_vc);
637 if (!CON_IS_VISIBLE(old_vc)) {
638 save_screen(old_vc);
639 set_origin(old_vc);
640 }
641 } else {
642 hide_cursor(vc);
643 redraw = 1;
644 }
645
646 if (redraw) {
647 int update;
648 int old_was_color = vc->vc_can_do_color;
649
650 set_origin(vc);
651 update = vc->vc_sw->con_switch(vc);
652 set_palette(vc);
653 /*
654 * If console changed from mono<->color, the best we can do
655 * is to clear the buffer attributes. As it currently stands,
656 * rebuilding new attributes from the old buffer is not doable
657 * without overly complex code.
658 */
659 if (old_was_color != vc->vc_can_do_color) {
660 update_attr(vc);
661 clear_buffer_attributes(vc);
662 }
663 if (update && vc->vc_mode != KD_GRAPHICS)
664 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
665 }
666 set_cursor(vc);
667 if (is_switch) {
668 set_leds();
669 compute_shiftstate();
670 }
671 }
672
673 /*
674 * Allocation, freeing and resizing of VTs.
675 */
676
677 int vc_cons_allocated(unsigned int i)
678 {
679 return (i < MAX_NR_CONSOLES && vc_cons[i].d);
680 }
681
682 static void visual_init(struct vc_data *vc, int num, int init)
683 {
684 /* ++Geert: vc->vc_sw->con_init determines console size */
685 if (vc->vc_sw)
686 module_put(vc->vc_sw->owner);
687 vc->vc_sw = conswitchp;
688 #ifndef VT_SINGLE_DRIVER
689 if (con_driver_map[num])
690 vc->vc_sw = con_driver_map[num];
691 #endif
692 __module_get(vc->vc_sw->owner);
693 vc->vc_num = num;
694 vc->vc_display_fg = &master_display_fg;
695 vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir;
696 vc->vc_uni_pagedir = 0;
697 vc->vc_hi_font_mask = 0;
698 vc->vc_complement_mask = 0;
699 vc->vc_can_do_color = 0;
700 vc->vc_sw->con_init(vc, init);
701 if (!vc->vc_complement_mask)
702 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
703 vc->vc_s_complement_mask = vc->vc_complement_mask;
704 vc->vc_size_row = vc->vc_cols << 1;
705 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
706 }
707
708 int vc_allocate(unsigned int currcons) /* return 0 on success */
709 {
710 WARN_CONSOLE_UNLOCKED();
711
712 if (currcons >= MAX_NR_CONSOLES)
713 return -ENXIO;
714 if (!vc_cons[currcons].d) {
715 struct vc_data *vc;
716
717 /* prevent users from taking too much memory */
718 if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE))
719 return -EPERM;
720
721 /* due to the granularity of kmalloc, we waste some memory here */
722 /* the alloc is done in two steps, to optimize the common situation
723 of a 25x80 console (structsize=216, screenbuf_size=4000) */
724 /* although the numbers above are not valid since long ago, the
725 point is still up-to-date and the comment still has its value
726 even if only as a historical artifact. --mj, July 1998 */
727 vc = kmalloc(sizeof(struct vc_data), GFP_KERNEL);
728 if (!vc)
729 return -ENOMEM;
730 memset(vc, 0, sizeof(*vc));
731 vc_cons[currcons].d = vc;
732 visual_init(vc, currcons, 1);
733 if (!*vc->vc_uni_pagedir_loc)
734 con_set_default_unimap(vc);
735 vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL);
736 if (!vc->vc_screenbuf) {
737 kfree(vc);
738 vc_cons[currcons].d = NULL;
739 return -ENOMEM;
740 }
741 vc->vc_kmalloced = 1;
742 vc_init(vc, vc->vc_rows, vc->vc_cols, 1);
743 }
744 return 0;
745 }
746
747 static inline int resize_screen(struct vc_data *vc, int width, int height)
748 {
749 /* Resizes the resolution of the display adapater */
750 int err = 0;
751
752 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize)
753 err = vc->vc_sw->con_resize(vc, width, height);
754 return err;
755 }
756
757 /*
758 * Change # of rows and columns (0 means unchanged/the size of fg_console)
759 * [this is to be used together with some user program
760 * like resize that changes the hardware videomode]
761 */
762 #define VC_RESIZE_MAXCOL (32767)
763 #define VC_RESIZE_MAXROW (32767)
764 int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int lines)
765 {
766 unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0;
767 unsigned int old_cols, old_rows, old_row_size, old_screen_size;
768 unsigned int new_cols, new_rows, new_row_size, new_screen_size;
769 unsigned int end;
770 unsigned short *newscreen;
771
772 WARN_CONSOLE_UNLOCKED();
773
774 if (!vc)
775 return -ENXIO;
776
777 if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW)
778 return -EINVAL;
779
780 new_cols = (cols ? cols : vc->vc_cols);
781 new_rows = (lines ? lines : vc->vc_rows);
782 new_row_size = new_cols << 1;
783 new_screen_size = new_row_size * new_rows;
784
785 if (new_cols == vc->vc_cols && new_rows == vc->vc_rows)
786 return 0;
787
788 newscreen = (unsigned short *) kmalloc(new_screen_size, GFP_USER);
789 if (!newscreen)
790 return -ENOMEM;
791
792 old_rows = vc->vc_rows;
793 old_cols = vc->vc_cols;
794 old_row_size = vc->vc_size_row;
795 old_screen_size = vc->vc_screenbuf_size;
796
797 err = resize_screen(vc, new_cols, new_rows);
798 if (err) {
799 kfree(newscreen);
800 return err;
801 }
802
803 vc->vc_rows = new_rows;
804 vc->vc_cols = new_cols;
805 vc->vc_size_row = new_row_size;
806 vc->vc_screenbuf_size = new_screen_size;
807
808 rlth = min(old_row_size, new_row_size);
809 rrem = new_row_size - rlth;
810 old_origin = vc->vc_origin;
811 new_origin = (long) newscreen;
812 new_scr_end = new_origin + new_screen_size;
813
814 if (vc->vc_y > new_rows) {
815 if (old_rows - vc->vc_y < new_rows) {
816 /*
817 * Cursor near the bottom, copy contents from the
818 * bottom of buffer
819 */
820 old_origin += (old_rows - new_rows) * old_row_size;
821 end = vc->vc_scr_end;
822 } else {
823 /*
824 * Cursor is in no man's land, copy 1/2 screenful
825 * from the top and bottom of cursor position
826 */
827 old_origin += (vc->vc_y - new_rows/2) * old_row_size;
828 end = old_origin + (old_row_size * new_rows);
829 }
830 } else
831 /*
832 * Cursor near the top, copy contents from the top of buffer
833 */
834 end = (old_rows > new_rows) ? old_origin +
835 (old_row_size * new_rows) :
836 vc->vc_scr_end;
837
838 update_attr(vc);
839
840 while (old_origin < end) {
841 scr_memcpyw((unsigned short *) new_origin,
842 (unsigned short *) old_origin, rlth);
843 if (rrem)
844 scr_memsetw((void *)(new_origin + rlth),
845 vc->vc_video_erase_char, rrem);
846 old_origin += old_row_size;
847 new_origin += new_row_size;
848 }
849 if (new_scr_end > new_origin)
850 scr_memsetw((void *)new_origin, vc->vc_video_erase_char,
851 new_scr_end - new_origin);
852 if (vc->vc_kmalloced)
853 kfree(vc->vc_screenbuf);
854 vc->vc_screenbuf = newscreen;
855 vc->vc_kmalloced = 1;
856 vc->vc_screenbuf_size = new_screen_size;
857 set_origin(vc);
858
859 /* do part of a reset_terminal() */
860 vc->vc_top = 0;
861 vc->vc_bottom = vc->vc_rows;
862 gotoxy(vc, vc->vc_x, vc->vc_y);
863 save_cur(vc);
864
865 if (vc->vc_tty) {
866 struct winsize ws, *cws = &vc->vc_tty->winsize;
867
868 memset(&ws, 0, sizeof(ws));
869 ws.ws_row = vc->vc_rows;
870 ws.ws_col = vc->vc_cols;
871 ws.ws_ypixel = vc->vc_scan_lines;
872 if ((ws.ws_row != cws->ws_row || ws.ws_col != cws->ws_col) &&
873 vc->vc_tty->pgrp > 0)
874 kill_pg(vc->vc_tty->pgrp, SIGWINCH, 1);
875 *cws = ws;
876 }
877
878 if (CON_IS_VISIBLE(vc))
879 update_screen(vc);
880 return err;
881 }
882
883
884 void vc_disallocate(unsigned int currcons)
885 {
886 WARN_CONSOLE_UNLOCKED();
887
888 if (vc_cons_allocated(currcons)) {
889 struct vc_data *vc = vc_cons[currcons].d;
890 vc->vc_sw->con_deinit(vc);
891 if (vc->vc_kmalloced)
892 kfree(vc->vc_screenbuf);
893 if (currcons >= MIN_NR_CONSOLES)
894 kfree(vc);
895 vc_cons[currcons].d = NULL;
896 }
897 }
898
899 /*
900 * VT102 emulator
901 */
902
903 #define set_kbd(vc, x) set_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
904 #define clr_kbd(vc, x) clr_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
905 #define is_kbd(vc, x) vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
906
907 #define decarm VC_REPEAT
908 #define decckm VC_CKMODE
909 #define kbdapplic VC_APPLIC
910 #define lnm VC_CRLF
911
912 /*
913 * this is what the terminal answers to a ESC-Z or csi0c query.
914 */
915 #define VT100ID "\033[?1;2c"
916 #define VT102ID "\033[?6c"
917
918 unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7,
919 8,12,10,14, 9,13,11,15 };
920
921 /* the default colour table, for VGA+ colour systems */
922 int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
923 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
924 int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
925 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
926 int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
927 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
928
929 /*
930 * gotoxy() must verify all boundaries, because the arguments
931 * might also be negative. If the given position is out of
932 * bounds, the cursor is placed at the nearest margin.
933 */
934 static void gotoxy(struct vc_data *vc, int new_x, int new_y)
935 {
936 int min_y, max_y;
937
938 if (new_x < 0)
939 vc->vc_x = 0;
940 else {
941 if (new_x >= vc->vc_cols)
942 vc->vc_x = vc->vc_cols - 1;
943 else
944 vc->vc_x = new_x;
945 }
946
947 if (vc->vc_decom) {
948 min_y = vc->vc_top;
949 max_y = vc->vc_bottom;
950 } else {
951 min_y = 0;
952 max_y = vc->vc_rows;
953 }
954 if (new_y < min_y)
955 vc->vc_y = min_y;
956 else if (new_y >= max_y)
957 vc->vc_y = max_y - 1;
958 else
959 vc->vc_y = new_y;
960 vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1);
961 vc->vc_need_wrap = 0;
962 }
963
964 /* for absolute user moves, when decom is set */
965 static void gotoxay(struct vc_data *vc, int new_x, int new_y)
966 {
967 gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y);
968 }
969
970 void scrollback(struct vc_data *vc, int lines)
971 {
972 if (!lines)
973 lines = vc->vc_rows / 2;
974 scrolldelta(-lines);
975 }
976
977 void scrollfront(struct vc_data *vc, int lines)
978 {
979 if (!lines)
980 lines = vc->vc_rows / 2;
981 scrolldelta(lines);
982 }
983
984 static void lf(struct vc_data *vc)
985 {
986 /* don't scroll if above bottom of scrolling region, or
987 * if below scrolling region
988 */
989 if (vc->vc_y + 1 == vc->vc_bottom)
990 scrup(vc, vc->vc_top, vc->vc_bottom, 1);
991 else if (vc->vc_y < vc->vc_rows - 1) {
992 vc->vc_y++;
993 vc->vc_pos += vc->vc_size_row;
994 }
995 vc->vc_need_wrap = 0;
996 }
997
998 static void ri(struct vc_data *vc)
999 {
1000 /* don't scroll if below top of scrolling region, or
1001 * if above scrolling region
1002 */
1003 if (vc->vc_y == vc->vc_top)
1004 scrdown(vc, vc->vc_top, vc->vc_bottom, 1);
1005 else if (vc->vc_y > 0) {
1006 vc->vc_y--;
1007 vc->vc_pos -= vc->vc_size_row;
1008 }
1009 vc->vc_need_wrap = 0;
1010 }
1011
1012 static inline void cr(struct vc_data *vc)
1013 {
1014 vc->vc_pos -= vc->vc_x << 1;
1015 vc->vc_need_wrap = vc->vc_x = 0;
1016 }
1017
1018 static inline void bs(struct vc_data *vc)
1019 {
1020 if (vc->vc_x) {
1021 vc->vc_pos -= 2;
1022 vc->vc_x--;
1023 vc->vc_need_wrap = 0;
1024 }
1025 }
1026
1027 static inline void del(struct vc_data *vc)
1028 {
1029 /* ignored */
1030 }
1031
1032 static void csi_J(struct vc_data *vc, int vpar)
1033 {
1034 unsigned int count;
1035 unsigned short * start;
1036
1037 switch (vpar) {
1038 case 0: /* erase from cursor to end of display */
1039 count = (vc->vc_scr_end - vc->vc_pos) >> 1;
1040 start = (unsigned short *)vc->vc_pos;
1041 if (DO_UPDATE(vc)) {
1042 /* do in two stages */
1043 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1044 vc->vc_cols - vc->vc_x);
1045 vc->vc_sw->con_clear(vc, vc->vc_y + 1, 0,
1046 vc->vc_rows - vc->vc_y - 1,
1047 vc->vc_cols);
1048 }
1049 break;
1050 case 1: /* erase from start to cursor */
1051 count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1;
1052 start = (unsigned short *)vc->vc_origin;
1053 if (DO_UPDATE(vc)) {
1054 /* do in two stages */
1055 vc->vc_sw->con_clear(vc, 0, 0, vc->vc_y,
1056 vc->vc_cols);
1057 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1058 vc->vc_x + 1);
1059 }
1060 break;
1061 case 2: /* erase whole display */
1062 count = vc->vc_cols * vc->vc_rows;
1063 start = (unsigned short *)vc->vc_origin;
1064 if (DO_UPDATE(vc))
1065 vc->vc_sw->con_clear(vc, 0, 0,
1066 vc->vc_rows,
1067 vc->vc_cols);
1068 break;
1069 default:
1070 return;
1071 }
1072 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1073 vc->vc_need_wrap = 0;
1074 }
1075
1076 static void csi_K(struct vc_data *vc, int vpar)
1077 {
1078 unsigned int count;
1079 unsigned short * start;
1080
1081 switch (vpar) {
1082 case 0: /* erase from cursor to end of line */
1083 count = vc->vc_cols - vc->vc_x;
1084 start = (unsigned short *)vc->vc_pos;
1085 if (DO_UPDATE(vc))
1086 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1087 vc->vc_cols - vc->vc_x);
1088 break;
1089 case 1: /* erase from start of line to cursor */
1090 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1091 count = vc->vc_x + 1;
1092 if (DO_UPDATE(vc))
1093 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1094 vc->vc_x + 1);
1095 break;
1096 case 2: /* erase whole line */
1097 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1098 count = vc->vc_cols;
1099 if (DO_UPDATE(vc))
1100 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1101 vc->vc_cols);
1102 break;
1103 default:
1104 return;
1105 }
1106 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1107 vc->vc_need_wrap = 0;
1108 }
1109
1110 static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */
1111 { /* not vt100? */
1112 int count;
1113
1114 if (!vpar)
1115 vpar++;
1116 count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar;
1117
1118 scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count);
1119 if (DO_UPDATE(vc))
1120 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count);
1121 vc->vc_need_wrap = 0;
1122 }
1123
1124 static void default_attr(struct vc_data *vc)
1125 {
1126 vc->vc_intensity = 1;
1127 vc->vc_underline = 0;
1128 vc->vc_reverse = 0;
1129 vc->vc_blink = 0;
1130 vc->vc_color = vc->vc_def_color;
1131 }
1132
1133 /* console_sem is held */
1134 static void csi_m(struct vc_data *vc)
1135 {
1136 int i;
1137
1138 for (i = 0; i <= vc->vc_npar; i++)
1139 switch (vc->vc_par[i]) {
1140 case 0: /* all attributes off */
1141 default_attr(vc);
1142 break;
1143 case 1:
1144 vc->vc_intensity = 2;
1145 break;
1146 case 2:
1147 vc->vc_intensity = 0;
1148 break;
1149 case 4:
1150 vc->vc_underline = 1;
1151 break;
1152 case 5:
1153 vc->vc_blink = 1;
1154 break;
1155 case 7:
1156 vc->vc_reverse = 1;
1157 break;
1158 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1159 * Select primary font, don't display
1160 * control chars if defined, don't set
1161 * bit 8 on output.
1162 */
1163 vc->vc_translate = set_translate(vc->vc_charset == 0
1164 ? vc->vc_G0_charset
1165 : vc->vc_G1_charset, vc);
1166 vc->vc_disp_ctrl = 0;
1167 vc->vc_toggle_meta = 0;
1168 break;
1169 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1170 * Select first alternate font, lets
1171 * chars < 32 be displayed as ROM chars.
1172 */
1173 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1174 vc->vc_disp_ctrl = 1;
1175 vc->vc_toggle_meta = 0;
1176 break;
1177 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1178 * Select second alternate font, toggle
1179 * high bit before displaying as ROM char.
1180 */
1181 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1182 vc->vc_disp_ctrl = 1;
1183 vc->vc_toggle_meta = 1;
1184 break;
1185 case 21:
1186 case 22:
1187 vc->vc_intensity = 1;
1188 break;
1189 case 24:
1190 vc->vc_underline = 0;
1191 break;
1192 case 25:
1193 vc->vc_blink = 0;
1194 break;
1195 case 27:
1196 vc->vc_reverse = 0;
1197 break;
1198 case 38: /* ANSI X3.64-1979 (SCO-ish?)
1199 * Enables underscore, white foreground
1200 * with white underscore (Linux - use
1201 * default foreground).
1202 */
1203 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1204 vc->vc_underline = 1;
1205 break;
1206 case 39: /* ANSI X3.64-1979 (SCO-ish?)
1207 * Disable underline option.
1208 * Reset colour to default? It did this
1209 * before...
1210 */
1211 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1212 vc->vc_underline = 0;
1213 break;
1214 case 49:
1215 vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f);
1216 break;
1217 default:
1218 if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37)
1219 vc->vc_color = color_table[vc->vc_par[i] - 30]
1220 | (vc->vc_color & 0xf0);
1221 else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47)
1222 vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4)
1223 | (vc->vc_color & 0x0f);
1224 break;
1225 }
1226 update_attr(vc);
1227 }
1228
1229 static void respond_string(const char *p, struct tty_struct *tty)
1230 {
1231 while (*p) {
1232 tty_insert_flip_char(tty, *p, 0);
1233 p++;
1234 }
1235 con_schedule_flip(tty);
1236 }
1237
1238 static void cursor_report(struct vc_data *vc, struct tty_struct *tty)
1239 {
1240 char buf[40];
1241
1242 sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1);
1243 respond_string(buf, tty);
1244 }
1245
1246 static inline void status_report(struct tty_struct *tty)
1247 {
1248 respond_string("\033[0n", tty); /* Terminal ok */
1249 }
1250
1251 static inline void respond_ID(struct tty_struct * tty)
1252 {
1253 respond_string(VT102ID, tty);
1254 }
1255
1256 void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry)
1257 {
1258 char buf[8];
1259
1260 sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx),
1261 (char)('!' + mry));
1262 respond_string(buf, tty);
1263 }
1264
1265 /* invoked via ioctl(TIOCLINUX) and through set_selection */
1266 int mouse_reporting(void)
1267 {
1268 return vc_cons[fg_console].d->vc_report_mouse;
1269 }
1270
1271 /* console_sem is held */
1272 static void set_mode(struct vc_data *vc, int on_off)
1273 {
1274 int i;
1275
1276 for (i = 0; i <= vc->vc_npar; i++)
1277 if (vc->vc_ques) {
1278 switch(vc->vc_par[i]) { /* DEC private modes set/reset */
1279 case 1: /* Cursor keys send ^[Ox/^[[x */
1280 if (on_off)
1281 set_kbd(vc, decckm);
1282 else
1283 clr_kbd(vc, decckm);
1284 break;
1285 case 3: /* 80/132 mode switch unimplemented */
1286 vc->vc_deccolm = on_off;
1287 #if 0
1288 vc_resize(deccolm ? 132 : 80, vc->vc_rows);
1289 /* this alone does not suffice; some user mode
1290 utility has to change the hardware regs */
1291 #endif
1292 break;
1293 case 5: /* Inverted screen on/off */
1294 if (vc->vc_decscnm != on_off) {
1295 vc->vc_decscnm = on_off;
1296 invert_screen(vc, 0, vc->vc_screenbuf_size, 0);
1297 update_attr(vc);
1298 }
1299 break;
1300 case 6: /* Origin relative/absolute */
1301 vc->vc_decom = on_off;
1302 gotoxay(vc, 0, 0);
1303 break;
1304 case 7: /* Autowrap on/off */
1305 vc->vc_decawm = on_off;
1306 break;
1307 case 8: /* Autorepeat on/off */
1308 if (on_off)
1309 set_kbd(vc, decarm);
1310 else
1311 clr_kbd(vc, decarm);
1312 break;
1313 case 9:
1314 vc->vc_report_mouse = on_off ? 1 : 0;
1315 break;
1316 case 25: /* Cursor on/off */
1317 vc->vc_deccm = on_off;
1318 break;
1319 case 1000:
1320 vc->vc_report_mouse = on_off ? 2 : 0;
1321 break;
1322 }
1323 } else {
1324 switch(vc->vc_par[i]) { /* ANSI modes set/reset */
1325 case 3: /* Monitor (display ctrls) */
1326 vc->vc_disp_ctrl = on_off;
1327 break;
1328 case 4: /* Insert Mode on/off */
1329 vc->vc_decim = on_off;
1330 break;
1331 case 20: /* Lf, Enter == CrLf/Lf */
1332 if (on_off)
1333 set_kbd(vc, lnm);
1334 else
1335 clr_kbd(vc, lnm);
1336 break;
1337 }
1338 }
1339 }
1340
1341 /* console_sem is held */
1342 static void setterm_command(struct vc_data *vc)
1343 {
1344 switch(vc->vc_par[0]) {
1345 case 1: /* set color for underline mode */
1346 if (vc->vc_can_do_color &&
1347 vc->vc_par[1] < 16) {
1348 vc->vc_ulcolor = color_table[vc->vc_par[1]];
1349 if (vc->vc_underline)
1350 update_attr(vc);
1351 }
1352 break;
1353 case 2: /* set color for half intensity mode */
1354 if (vc->vc_can_do_color &&
1355 vc->vc_par[1] < 16) {
1356 vc->vc_halfcolor = color_table[vc->vc_par[1]];
1357 if (vc->vc_intensity == 0)
1358 update_attr(vc);
1359 }
1360 break;
1361 case 8: /* store colors as defaults */
1362 vc->vc_def_color = vc->vc_attr;
1363 if (vc->vc_hi_font_mask == 0x100)
1364 vc->vc_def_color >>= 1;
1365 default_attr(vc);
1366 update_attr(vc);
1367 break;
1368 case 9: /* set blanking interval */
1369 blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1370 poke_blanked_console();
1371 break;
1372 case 10: /* set bell frequency in Hz */
1373 if (vc->vc_npar >= 1)
1374 vc->vc_bell_pitch = vc->vc_par[1];
1375 else
1376 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1377 break;
1378 case 11: /* set bell duration in msec */
1379 if (vc->vc_npar >= 1)
1380 vc->vc_bell_duration = (vc->vc_par[1] < 2000) ?
1381 vc->vc_par[1] * HZ / 1000 : 0;
1382 else
1383 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1384 break;
1385 case 12: /* bring specified console to the front */
1386 if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1))
1387 set_console(vc->vc_par[1] - 1);
1388 break;
1389 case 13: /* unblank the screen */
1390 poke_blanked_console();
1391 break;
1392 case 14: /* set vesa powerdown interval */
1393 vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1394 break;
1395 case 15: /* activate the previous console */
1396 set_console(last_console);
1397 break;
1398 }
1399 }
1400
1401 /* console_sem is held */
1402 static void csi_at(struct vc_data *vc, unsigned int nr)
1403 {
1404 if (nr > vc->vc_cols - vc->vc_x)
1405 nr = vc->vc_cols - vc->vc_x;
1406 else if (!nr)
1407 nr = 1;
1408 insert_char(vc, nr);
1409 }
1410
1411 /* console_sem is held */
1412 static void csi_L(struct vc_data *vc, unsigned int nr)
1413 {
1414 if (nr > vc->vc_rows - vc->vc_y)
1415 nr = vc->vc_rows - vc->vc_y;
1416 else if (!nr)
1417 nr = 1;
1418 scrdown(vc, vc->vc_y, vc->vc_bottom, nr);
1419 vc->vc_need_wrap = 0;
1420 }
1421
1422 /* console_sem is held */
1423 static void csi_P(struct vc_data *vc, unsigned int nr)
1424 {
1425 if (nr > vc->vc_cols - vc->vc_x)
1426 nr = vc->vc_cols - vc->vc_x;
1427 else if (!nr)
1428 nr = 1;
1429 delete_char(vc, nr);
1430 }
1431
1432 /* console_sem is held */
1433 static void csi_M(struct vc_data *vc, unsigned int nr)
1434 {
1435 if (nr > vc->vc_rows - vc->vc_y)
1436 nr = vc->vc_rows - vc->vc_y;
1437 else if (!nr)
1438 nr=1;
1439 scrup(vc, vc->vc_y, vc->vc_bottom, nr);
1440 vc->vc_need_wrap = 0;
1441 }
1442
1443 /* console_sem is held (except via vc_init->reset_terminal */
1444 static void save_cur(struct vc_data *vc)
1445 {
1446 vc->vc_saved_x = vc->vc_x;
1447 vc->vc_saved_y = vc->vc_y;
1448 vc->vc_s_intensity = vc->vc_intensity;
1449 vc->vc_s_underline = vc->vc_underline;
1450 vc->vc_s_blink = vc->vc_blink;
1451 vc->vc_s_reverse = vc->vc_reverse;
1452 vc->vc_s_charset = vc->vc_charset;
1453 vc->vc_s_color = vc->vc_color;
1454 vc->vc_saved_G0 = vc->vc_G0_charset;
1455 vc->vc_saved_G1 = vc->vc_G1_charset;
1456 }
1457
1458 /* console_sem is held */
1459 static void restore_cur(struct vc_data *vc)
1460 {
1461 gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y);
1462 vc->vc_intensity = vc->vc_s_intensity;
1463 vc->vc_underline = vc->vc_s_underline;
1464 vc->vc_blink = vc->vc_s_blink;
1465 vc->vc_reverse = vc->vc_s_reverse;
1466 vc->vc_charset = vc->vc_s_charset;
1467 vc->vc_color = vc->vc_s_color;
1468 vc->vc_G0_charset = vc->vc_saved_G0;
1469 vc->vc_G1_charset = vc->vc_saved_G1;
1470 vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc);
1471 update_attr(vc);
1472 vc->vc_need_wrap = 0;
1473 }
1474
1475 enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey,
1476 EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd,
1477 ESpalette };
1478
1479 /* console_sem is held (except via vc_init()) */
1480 static void reset_terminal(struct vc_data *vc, int do_clear)
1481 {
1482 vc->vc_top = 0;
1483 vc->vc_bottom = vc->vc_rows;
1484 vc->vc_state = ESnormal;
1485 vc->vc_ques = 0;
1486 vc->vc_translate = set_translate(LAT1_MAP, vc);
1487 vc->vc_G0_charset = LAT1_MAP;
1488 vc->vc_G1_charset = GRAF_MAP;
1489 vc->vc_charset = 0;
1490 vc->vc_need_wrap = 0;
1491 vc->vc_report_mouse = 0;
1492 vc->vc_utf = 0;
1493 vc->vc_utf_count = 0;
1494
1495 vc->vc_disp_ctrl = 0;
1496 vc->vc_toggle_meta = 0;
1497
1498 vc->vc_decscnm = 0;
1499 vc->vc_decom = 0;
1500 vc->vc_decawm = 1;
1501 vc->vc_deccm = 1;
1502 vc->vc_decim = 0;
1503
1504 set_kbd(vc, decarm);
1505 clr_kbd(vc, decckm);
1506 clr_kbd(vc, kbdapplic);
1507 clr_kbd(vc, lnm);
1508 kbd_table[vc->vc_num].lockstate = 0;
1509 kbd_table[vc->vc_num].slockstate = 0;
1510 kbd_table[vc->vc_num].ledmode = LED_SHOW_FLAGS;
1511 kbd_table[vc->vc_num].ledflagstate = kbd_table[vc->vc_num].default_ledflagstate;
1512 /* do not do set_leds here because this causes an endless tasklet loop
1513 when the keyboard hasn't been initialized yet */
1514
1515 vc->vc_cursor_type = CUR_DEFAULT;
1516 vc->vc_complement_mask = vc->vc_s_complement_mask;
1517
1518 default_attr(vc);
1519 update_attr(vc);
1520
1521 vc->vc_tab_stop[0] = 0x01010100;
1522 vc->vc_tab_stop[1] =
1523 vc->vc_tab_stop[2] =
1524 vc->vc_tab_stop[3] =
1525 vc->vc_tab_stop[4] = 0x01010101;
1526
1527 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1528 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1529
1530 gotoxy(vc, 0, 0);
1531 save_cur(vc);
1532 if (do_clear)
1533 csi_J(vc, 2);
1534 }
1535
1536 /* console_sem is held */
1537 static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
1538 {
1539 /*
1540 * Control characters can be used in the _middle_
1541 * of an escape sequence.
1542 */
1543 switch (c) {
1544 case 0:
1545 return;
1546 case 7:
1547 if (vc->vc_bell_duration)
1548 kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration);
1549 return;
1550 case 8:
1551 bs(vc);
1552 return;
1553 case 9:
1554 vc->vc_pos -= (vc->vc_x << 1);
1555 while (vc->vc_x < vc->vc_cols - 1) {
1556 vc->vc_x++;
1557 if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31)))
1558 break;
1559 }
1560 vc->vc_pos += (vc->vc_x << 1);
1561 return;
1562 case 10: case 11: case 12:
1563 lf(vc);
1564 if (!is_kbd(vc, lnm))
1565 return;
1566 case 13:
1567 cr(vc);
1568 return;
1569 case 14:
1570 vc->vc_charset = 1;
1571 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1572 vc->vc_disp_ctrl = 1;
1573 return;
1574 case 15:
1575 vc->vc_charset = 0;
1576 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1577 vc->vc_disp_ctrl = 0;
1578 return;
1579 case 24: case 26:
1580 vc->vc_state = ESnormal;
1581 return;
1582 case 27:
1583 vc->vc_state = ESesc;
1584 return;
1585 case 127:
1586 del(vc);
1587 return;
1588 case 128+27:
1589 vc->vc_state = ESsquare;
1590 return;
1591 }
1592 switch(vc->vc_state) {
1593 case ESesc:
1594 vc->vc_state = ESnormal;
1595 switch (c) {
1596 case '[':
1597 vc->vc_state = ESsquare;
1598 return;
1599 case ']':
1600 vc->vc_state = ESnonstd;
1601 return;
1602 case '%':
1603 vc->vc_state = ESpercent;
1604 return;
1605 case 'E':
1606 cr(vc);
1607 lf(vc);
1608 return;
1609 case 'M':
1610 ri(vc);
1611 return;
1612 case 'D':
1613 lf(vc);
1614 return;
1615 case 'H':
1616 vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31));
1617 return;
1618 case 'Z':
1619 respond_ID(tty);
1620 return;
1621 case '7':
1622 save_cur(vc);
1623 return;
1624 case '8':
1625 restore_cur(vc);
1626 return;
1627 case '(':
1628 vc->vc_state = ESsetG0;
1629 return;
1630 case ')':
1631 vc->vc_state = ESsetG1;
1632 return;
1633 case '#':
1634 vc->vc_state = EShash;
1635 return;
1636 case 'c':
1637 reset_terminal(vc, 1);
1638 return;
1639 case '>': /* Numeric keypad */
1640 clr_kbd(vc, kbdapplic);
1641 return;
1642 case '=': /* Appl. keypad */
1643 set_kbd(vc, kbdapplic);
1644 return;
1645 }
1646 return;
1647 case ESnonstd:
1648 if (c=='P') { /* palette escape sequence */
1649 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1650 vc->vc_par[vc->vc_npar] = 0;
1651 vc->vc_npar = 0;
1652 vc->vc_state = ESpalette;
1653 return;
1654 } else if (c=='R') { /* reset palette */
1655 reset_palette(vc);
1656 vc->vc_state = ESnormal;
1657 } else
1658 vc->vc_state = ESnormal;
1659 return;
1660 case ESpalette:
1661 if ( (c>='0'&&c<='9') || (c>='A'&&c<='F') || (c>='a'&&c<='f') ) {
1662 vc->vc_par[vc->vc_npar++] = (c > '9' ? (c & 0xDF) - 'A' + 10 : c - '0');
1663 if (vc->vc_npar == 7) {
1664 int i = vc->vc_par[0] * 3, j = 1;
1665 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1666 vc->vc_palette[i++] += vc->vc_par[j++];
1667 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1668 vc->vc_palette[i++] += vc->vc_par[j++];
1669 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1670 vc->vc_palette[i] += vc->vc_par[j];
1671 set_palette(vc);
1672 vc->vc_state = ESnormal;
1673 }
1674 } else
1675 vc->vc_state = ESnormal;
1676 return;
1677 case ESsquare:
1678 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1679 vc->vc_par[vc->vc_npar] = 0;
1680 vc->vc_npar = 0;
1681 vc->vc_state = ESgetpars;
1682 if (c == '[') { /* Function key */
1683 vc->vc_state=ESfunckey;
1684 return;
1685 }
1686 vc->vc_ques = (c == '?');
1687 if (vc->vc_ques)
1688 return;
1689 case ESgetpars:
1690 if (c == ';' && vc->vc_npar < NPAR - 1) {
1691 vc->vc_npar++;
1692 return;
1693 } else if (c>='0' && c<='9') {
1694 vc->vc_par[vc->vc_npar] *= 10;
1695 vc->vc_par[vc->vc_npar] += c - '0';
1696 return;
1697 } else
1698 vc->vc_state = ESgotpars;
1699 case ESgotpars:
1700 vc->vc_state = ESnormal;
1701 switch(c) {
1702 case 'h':
1703 set_mode(vc, 1);
1704 return;
1705 case 'l':
1706 set_mode(vc, 0);
1707 return;
1708 case 'c':
1709 if (vc->vc_ques) {
1710 if (vc->vc_par[0])
1711 vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16);
1712 else
1713 vc->vc_cursor_type = CUR_DEFAULT;
1714 return;
1715 }
1716 break;
1717 case 'm':
1718 if (vc->vc_ques) {
1719 clear_selection();
1720 if (vc->vc_par[0])
1721 vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1];
1722 else
1723 vc->vc_complement_mask = vc->vc_s_complement_mask;
1724 return;
1725 }
1726 break;
1727 case 'n':
1728 if (!vc->vc_ques) {
1729 if (vc->vc_par[0] == 5)
1730 status_report(tty);
1731 else if (vc->vc_par[0] == 6)
1732 cursor_report(vc, tty);
1733 }
1734 return;
1735 }
1736 if (vc->vc_ques) {
1737 vc->vc_ques = 0;
1738 return;
1739 }
1740 switch(c) {
1741 case 'G': case '`':
1742 if (vc->vc_par[0])
1743 vc->vc_par[0]--;
1744 gotoxy(vc, vc->vc_par[0], vc->vc_y);
1745 return;
1746 case 'A':
1747 if (!vc->vc_par[0])
1748 vc->vc_par[0]++;
1749 gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]);
1750 return;
1751 case 'B': case 'e':
1752 if (!vc->vc_par[0])
1753 vc->vc_par[0]++;
1754 gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]);
1755 return;
1756 case 'C': case 'a':
1757 if (!vc->vc_par[0])
1758 vc->vc_par[0]++;
1759 gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y);
1760 return;
1761 case 'D':
1762 if (!vc->vc_par[0])
1763 vc->vc_par[0]++;
1764 gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y);
1765 return;
1766 case 'E':
1767 if (!vc->vc_par[0])
1768 vc->vc_par[0]++;
1769 gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]);
1770 return;
1771 case 'F':
1772 if (!vc->vc_par[0])
1773 vc->vc_par[0]++;
1774 gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]);
1775 return;
1776 case 'd':
1777 if (vc->vc_par[0])
1778 vc->vc_par[0]--;
1779 gotoxay(vc, vc->vc_x ,vc->vc_par[0]);
1780 return;
1781 case 'H': case 'f':
1782 if (vc->vc_par[0])
1783 vc->vc_par[0]--;
1784 if (vc->vc_par[1])
1785 vc->vc_par[1]--;
1786 gotoxay(vc, vc->vc_par[1], vc->vc_par[0]);
1787 return;
1788 case 'J':
1789 csi_J(vc, vc->vc_par[0]);
1790 return;
1791 case 'K':
1792 csi_K(vc, vc->vc_par[0]);
1793 return;
1794 case 'L':
1795 csi_L(vc, vc->vc_par[0]);
1796 return;
1797 case 'M':
1798 csi_M(vc, vc->vc_par[0]);
1799 return;
1800 case 'P':
1801 csi_P(vc, vc->vc_par[0]);
1802 return;
1803 case 'c':
1804 if (!vc->vc_par[0])
1805 respond_ID(tty);
1806 return;
1807 case 'g':
1808 if (!vc->vc_par[0])
1809 vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31));
1810 else if (vc->vc_par[0] == 3) {
1811 vc->vc_tab_stop[0] =
1812 vc->vc_tab_stop[1] =
1813 vc->vc_tab_stop[2] =
1814 vc->vc_tab_stop[3] =
1815 vc->vc_tab_stop[4] = 0;
1816 }
1817 return;
1818 case 'm':
1819 csi_m(vc);
1820 return;
1821 case 'q': /* DECLL - but only 3 leds */
1822 /* map 0,1,2,3 to 0,1,2,4 */
1823 if (vc->vc_par[0] < 4)
1824 setledstate(kbd_table + vc->vc_num,
1825 (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4);
1826 return;
1827 case 'r':
1828 if (!vc->vc_par[0])
1829 vc->vc_par[0]++;
1830 if (!vc->vc_par[1])
1831 vc->vc_par[1] = vc->vc_rows;
1832 /* Minimum allowed region is 2 lines */
1833 if (vc->vc_par[0] < vc->vc_par[1] &&
1834 vc->vc_par[1] <= vc->vc_rows) {
1835 vc->vc_top = vc->vc_par[0] - 1;
1836 vc->vc_bottom = vc->vc_par[1];
1837 gotoxay(vc, 0, 0);
1838 }
1839 return;
1840 case 's':
1841 save_cur(vc);
1842 return;
1843 case 'u':
1844 restore_cur(vc);
1845 return;
1846 case 'X':
1847 csi_X(vc, vc->vc_par[0]);
1848 return;
1849 case '@':
1850 csi_at(vc, vc->vc_par[0]);
1851 return;
1852 case ']': /* setterm functions */
1853 setterm_command(vc);
1854 return;
1855 }
1856 return;
1857 case ESpercent:
1858 vc->vc_state = ESnormal;
1859 switch (c) {
1860 case '@': /* defined in ISO 2022 */
1861 vc->vc_utf = 0;
1862 return;
1863 case 'G': /* prelim official escape code */
1864 case '8': /* retained for compatibility */
1865 vc->vc_utf = 1;
1866 return;
1867 }
1868 return;
1869 case ESfunckey:
1870 vc->vc_state = ESnormal;
1871 return;
1872 case EShash:
1873 vc->vc_state = ESnormal;
1874 if (c == '8') {
1875 /* DEC screen alignment test. kludge :-) */
1876 vc->vc_video_erase_char =
1877 (vc->vc_video_erase_char & 0xff00) | 'E';
1878 csi_J(vc, 2);
1879 vc->vc_video_erase_char =
1880 (vc->vc_video_erase_char & 0xff00) | ' ';
1881 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
1882 }
1883 return;
1884 case ESsetG0:
1885 if (c == '0')
1886 vc->vc_G0_charset = GRAF_MAP;
1887 else if (c == 'B')
1888 vc->vc_G0_charset = LAT1_MAP;
1889 else if (c == 'U')
1890 vc->vc_G0_charset = IBMPC_MAP;
1891 else if (c == 'K')
1892 vc->vc_G0_charset = USER_MAP;
1893 if (vc->vc_charset == 0)
1894 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1895 vc->vc_state = ESnormal;
1896 return;
1897 case ESsetG1:
1898 if (c == '0')
1899 vc->vc_G1_charset = GRAF_MAP;
1900 else if (c == 'B')
1901 vc->vc_G1_charset = LAT1_MAP;
1902 else if (c == 'U')
1903 vc->vc_G1_charset = IBMPC_MAP;
1904 else if (c == 'K')
1905 vc->vc_G1_charset = USER_MAP;
1906 if (vc->vc_charset == 1)
1907 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1908 vc->vc_state = ESnormal;
1909 return;
1910 default:
1911 vc->vc_state = ESnormal;
1912 }
1913 }
1914
1915 /* This is a temporary buffer used to prepare a tty console write
1916 * so that we can easily avoid touching user space while holding the
1917 * console spinlock. It is allocated in con_init and is shared by
1918 * this code and the vc_screen read/write tty calls.
1919 *
1920 * We have to allocate this statically in the kernel data section
1921 * since console_init (and thus con_init) are called before any
1922 * kernel memory allocation is available.
1923 */
1924 char con_buf[CON_BUF_SIZE];
1925 DECLARE_MUTEX(con_buf_sem);
1926
1927 /* acquires console_sem */
1928 static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count)
1929 {
1930 #ifdef VT_BUF_VRAM_ONLY
1931 #define FLUSH do { } while(0);
1932 #else
1933 #define FLUSH if (draw_x >= 0) { \
1934 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
1935 draw_x = -1; \
1936 }
1937 #endif
1938
1939 int c, tc, ok, n = 0, draw_x = -1;
1940 unsigned int currcons;
1941 unsigned long draw_from = 0, draw_to = 0;
1942 struct vc_data *vc;
1943 u16 himask, charmask;
1944 const unsigned char *orig_buf = NULL;
1945 int orig_count;
1946
1947 if (in_interrupt())
1948 return count;
1949
1950 might_sleep();
1951
1952 acquire_console_sem();
1953 vc = tty->driver_data;
1954 if (vc == NULL) {
1955 printk(KERN_ERR "vt: argh, driver_data is NULL !\n");
1956 release_console_sem();
1957 return 0;
1958 }
1959
1960 currcons = vc->vc_num;
1961 if (!vc_cons_allocated(currcons)) {
1962 /* could this happen? */
1963 static int error = 0;
1964 if (!error) {
1965 error = 1;
1966 printk("con_write: tty %d not allocated\n", currcons+1);
1967 }
1968 release_console_sem();
1969 return 0;
1970 }
1971 release_console_sem();
1972
1973 orig_buf = buf;
1974 orig_count = count;
1975
1976 /* At this point 'buf' is guaranteed to be a kernel buffer
1977 * and therefore no access to userspace (and therefore sleeping)
1978 * will be needed. The con_buf_sem serializes all tty based
1979 * console rendering and vcs write/read operations. We hold
1980 * the console spinlock during the entire write.
1981 */
1982
1983 acquire_console_sem();
1984
1985 vc = tty->driver_data;
1986 if (vc == NULL) {
1987 printk(KERN_ERR "vt: argh, driver_data _became_ NULL !\n");
1988 release_console_sem();
1989 goto out;
1990 }
1991
1992 himask = vc->vc_hi_font_mask;
1993 charmask = himask ? 0x1ff : 0xff;
1994
1995 /* undraw cursor first */
1996 if (IS_FG(vc))
1997 hide_cursor(vc);
1998
1999 while (!tty->stopped && count) {
2000 int orig = *buf;
2001 c = orig;
2002 buf++;
2003 n++;
2004 count--;
2005
2006 /* Do no translation at all in control states */
2007 if (vc->vc_state != ESnormal) {
2008 tc = c;
2009 } else if (vc->vc_utf) {
2010 /* Combine UTF-8 into Unicode */
2011 /* Incomplete characters silently ignored */
2012 if(c > 0x7f) {
2013 if (vc->vc_utf_count > 0 && (c & 0xc0) == 0x80) {
2014 vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f);
2015 vc->vc_utf_count--;
2016 if (vc->vc_utf_count == 0)
2017 tc = c = vc->vc_utf_char;
2018 else continue;
2019 } else {
2020 if ((c & 0xe0) == 0xc0) {
2021 vc->vc_utf_count = 1;
2022 vc->vc_utf_char = (c & 0x1f);
2023 } else if ((c & 0xf0) == 0xe0) {
2024 vc->vc_utf_count = 2;
2025 vc->vc_utf_char = (c & 0x0f);
2026 } else if ((c & 0xf8) == 0xf0) {
2027 vc->vc_utf_count = 3;
2028 vc->vc_utf_char = (c & 0x07);
2029 } else if ((c & 0xfc) == 0xf8) {
2030 vc->vc_utf_count = 4;
2031 vc->vc_utf_char = (c & 0x03);
2032 } else if ((c & 0xfe) == 0xfc) {
2033 vc->vc_utf_count = 5;
2034 vc->vc_utf_char = (c & 0x01);
2035 } else
2036 vc->vc_utf_count = 0;
2037 continue;
2038 }
2039 } else {
2040 tc = c;
2041 vc->vc_utf_count = 0;
2042 }
2043 } else { /* no utf */
2044 tc = vc->vc_translate[vc->vc_toggle_meta ? (c | 0x80) : c];
2045 }
2046
2047 /* If the original code was a control character we
2048 * only allow a glyph to be displayed if the code is
2049 * not normally used (such as for cursor movement) or
2050 * if the disp_ctrl mode has been explicitly enabled.
2051 * Certain characters (as given by the CTRL_ALWAYS
2052 * bitmap) are always displayed as control characters,
2053 * as the console would be pretty useless without
2054 * them; to display an arbitrary font position use the
2055 * direct-to-font zone in UTF-8 mode.
2056 */
2057 ok = tc && (c >= 32 ||
2058 (!vc->vc_utf && !(((vc->vc_disp_ctrl ? CTRL_ALWAYS
2059 : CTRL_ACTION) >> c) & 1)))
2060 && (c != 127 || vc->vc_disp_ctrl)
2061 && (c != 128+27);
2062
2063 if (vc->vc_state == ESnormal && ok) {
2064 /* Now try to find out how to display it */
2065 tc = conv_uni_to_pc(vc, tc);
2066 if ( tc == -4 ) {
2067 /* If we got -4 (not found) then see if we have
2068 defined a replacement character (U+FFFD) */
2069 tc = conv_uni_to_pc(vc, 0xfffd);
2070
2071 /* One reason for the -4 can be that we just
2072 did a clear_unimap();
2073 try at least to show something. */
2074 if (tc == -4)
2075 tc = c;
2076 } else if ( tc == -3 ) {
2077 /* Bad hash table -- hope for the best */
2078 tc = c;
2079 }
2080 if (tc & ~charmask)
2081 continue; /* Conversion failed */
2082
2083 if (vc->vc_need_wrap || vc->vc_decim)
2084 FLUSH
2085 if (vc->vc_need_wrap) {
2086 cr(vc);
2087 lf(vc);
2088 }
2089 if (vc->vc_decim)
2090 insert_char(vc, 1);
2091 scr_writew(himask ?
2092 ((vc->vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) :
2093 (vc->vc_attr << 8) + tc,
2094 (u16 *) vc->vc_pos);
2095 if (DO_UPDATE(vc) && draw_x < 0) {
2096 draw_x = vc->vc_x;
2097 draw_from = vc->vc_pos;
2098 }
2099 if (vc->vc_x == vc->vc_cols - 1) {
2100 vc->vc_need_wrap = vc->vc_decawm;
2101 draw_to = vc->vc_pos + 2;
2102 } else {
2103 vc->vc_x++;
2104 draw_to = (vc->vc_pos += 2);
2105 }
2106 continue;
2107 }
2108 FLUSH
2109 do_con_trol(tty, vc, orig);
2110 }
2111 FLUSH
2112 console_conditional_schedule();
2113 release_console_sem();
2114
2115 out:
2116 return n;
2117 #undef FLUSH
2118 }
2119
2120 /*
2121 * This is the console switching callback.
2122 *
2123 * Doing console switching in a process context allows
2124 * us to do the switches asynchronously (needed when we want
2125 * to switch due to a keyboard interrupt). Synchronization
2126 * with other console code and prevention of re-entrancy is
2127 * ensured with console_sem.
2128 */
2129 static void console_callback(void *ignored)
2130 {
2131 acquire_console_sem();
2132
2133 if (want_console >= 0) {
2134 if (want_console != fg_console &&
2135 vc_cons_allocated(want_console)) {
2136 hide_cursor(vc_cons[fg_console].d);
2137 change_console(vc_cons[want_console].d);
2138 /* we only changed when the console had already
2139 been allocated - a new console is not created
2140 in an interrupt routine */
2141 }
2142 want_console = -1;
2143 }
2144 if (do_poke_blanked_console) { /* do not unblank for a LED change */
2145 do_poke_blanked_console = 0;
2146 poke_blanked_console();
2147 }
2148 if (scrollback_delta) {
2149 struct vc_data *vc = vc_cons[fg_console].d;
2150 clear_selection();
2151 if (vc->vc_mode == KD_TEXT)
2152 vc->vc_sw->con_scrolldelta(vc, scrollback_delta);
2153 scrollback_delta = 0;
2154 }
2155 if (blank_timer_expired) {
2156 do_blank_screen(0);
2157 blank_timer_expired = 0;
2158 }
2159
2160 release_console_sem();
2161 }
2162
2163 void set_console(int nr)
2164 {
2165 want_console = nr;
2166 schedule_console_callback();
2167 }
2168
2169 struct tty_driver *console_driver;
2170
2171 #ifdef CONFIG_VT_CONSOLE
2172
2173 /*
2174 * Console on virtual terminal
2175 *
2176 * The console must be locked when we get here.
2177 */
2178
2179 static void vt_console_print(struct console *co, const char *b, unsigned count)
2180 {
2181 struct vc_data *vc = vc_cons[fg_console].d;
2182 unsigned char c;
2183 static unsigned long printing;
2184 const ushort *start;
2185 ushort cnt = 0;
2186 ushort myx;
2187
2188 /* console busy or not yet initialized */
2189 if (!printable || test_and_set_bit(0, &printing))
2190 return;
2191
2192 if (kmsg_redirect && vc_cons_allocated(kmsg_redirect - 1))
2193 vc = vc_cons[kmsg_redirect - 1].d;
2194
2195 /* read `x' only after setting currcons properly (otherwise
2196 the `x' macro will read the x of the foreground console). */
2197 myx = vc->vc_x;
2198
2199 if (!vc_cons_allocated(fg_console)) {
2200 /* impossible */
2201 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2202 goto quit;
2203 }
2204
2205 if (vc->vc_mode != KD_TEXT)
2206 goto quit;
2207
2208 /* undraw cursor first */
2209 if (IS_FG(vc))
2210 hide_cursor(vc);
2211
2212 start = (ushort *)vc->vc_pos;
2213
2214 /* Contrived structure to try to emulate original need_wrap behaviour
2215 * Problems caused when we have need_wrap set on '\n' character */
2216 while (count--) {
2217 c = *b++;
2218 if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) {
2219 if (cnt > 0) {
2220 if (CON_IS_VISIBLE(vc))
2221 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2222 vc->vc_x += cnt;
2223 if (vc->vc_need_wrap)
2224 vc->vc_x--;
2225 cnt = 0;
2226 }
2227 if (c == 8) { /* backspace */
2228 bs(vc);
2229 start = (ushort *)vc->vc_pos;
2230 myx = vc->vc_x;
2231 continue;
2232 }
2233 if (c != 13)
2234 lf(vc);
2235 cr(vc);
2236 start = (ushort *)vc->vc_pos;
2237 myx = vc->vc_x;
2238 if (c == 10 || c == 13)
2239 continue;
2240 }
2241 scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos);
2242 cnt++;
2243 if (myx == vc->vc_cols - 1) {
2244 vc->vc_need_wrap = 1;
2245 continue;
2246 }
2247 vc->vc_pos += 2;
2248 myx++;
2249 }
2250 if (cnt > 0) {
2251 if (CON_IS_VISIBLE(vc))
2252 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2253 vc->vc_x += cnt;
2254 if (vc->vc_x == vc->vc_cols) {
2255 vc->vc_x--;
2256 vc->vc_need_wrap = 1;
2257 }
2258 }
2259 set_cursor(vc);
2260
2261 quit:
2262 clear_bit(0, &printing);
2263 }
2264
2265 static struct tty_driver *vt_console_device(struct console *c, int *index)
2266 {
2267 *index = c->index ? c->index-1 : fg_console;
2268 return console_driver;
2269 }
2270
2271 static struct console vt_console_driver = {
2272 .name = "tty",
2273 .write = vt_console_print,
2274 .device = vt_console_device,
2275 .unblank = unblank_screen,
2276 .flags = CON_PRINTBUFFER,
2277 .index = -1,
2278 };
2279 #endif
2280
2281 /*
2282 * Handling of Linux-specific VC ioctls
2283 */
2284
2285 /*
2286 * Generally a bit racy with respect to console_sem().
2287 *
2288 * There are some functions which don't need it.
2289 *
2290 * There are some functions which can sleep for arbitrary periods
2291 * (paste_selection) but we don't need the lock there anyway.
2292 *
2293 * set_selection has locking, and definitely needs it
2294 */
2295
2296 int tioclinux(struct tty_struct *tty, unsigned long arg)
2297 {
2298 char type, data;
2299 char __user *p = (char __user *)arg;
2300 int lines;
2301 int ret;
2302
2303 if (tty->driver->type != TTY_DRIVER_TYPE_CONSOLE)
2304 return -EINVAL;
2305 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN))
2306 return -EPERM;
2307 if (get_user(type, p))
2308 return -EFAULT;
2309 ret = 0;
2310 switch (type)
2311 {
2312 case TIOCL_SETSEL:
2313 acquire_console_sem();
2314 ret = set_selection((struct tiocl_selection __user *)(p+1), tty);
2315 release_console_sem();
2316 break;
2317 case TIOCL_PASTESEL:
2318 ret = paste_selection(tty);
2319 break;
2320 case TIOCL_UNBLANKSCREEN:
2321 acquire_console_sem();
2322 unblank_screen();
2323 release_console_sem();
2324 break;
2325 case TIOCL_SELLOADLUT:
2326 ret = sel_loadlut(p);
2327 break;
2328 case TIOCL_GETSHIFTSTATE:
2329
2330 /*
2331 * Make it possible to react to Shift+Mousebutton.
2332 * Note that 'shift_state' is an undocumented
2333 * kernel-internal variable; programs not closely
2334 * related to the kernel should not use this.
2335 */
2336 data = shift_state;
2337 ret = __put_user(data, p);
2338 break;
2339 case TIOCL_GETMOUSEREPORTING:
2340 data = mouse_reporting();
2341 ret = __put_user(data, p);
2342 break;
2343 case TIOCL_SETVESABLANK:
2344 set_vesa_blanking(p);
2345 break;
2346 case TIOCL_GETKMSGREDIRECT:
2347 data = kmsg_redirect;
2348 ret = __put_user(data, p);
2349 break;
2350 case TIOCL_SETKMSGREDIRECT:
2351 if (!capable(CAP_SYS_ADMIN)) {
2352 ret = -EPERM;
2353 } else {
2354 if (get_user(data, p+1))
2355 ret = -EFAULT;
2356 else
2357 kmsg_redirect = data;
2358 }
2359 break;
2360 case TIOCL_GETFGCONSOLE:
2361 ret = fg_console;
2362 break;
2363 case TIOCL_SCROLLCONSOLE:
2364 if (get_user(lines, (s32 __user *)(p+4))) {
2365 ret = -EFAULT;
2366 } else {
2367 scrollfront(vc_cons[fg_console].d, lines);
2368 ret = 0;
2369 }
2370 break;
2371 case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
2372 acquire_console_sem();
2373 ignore_poke = 1;
2374 do_blank_screen(0);
2375 release_console_sem();
2376 break;
2377 case TIOCL_BLANKEDSCREEN:
2378 ret = console_blanked;
2379 break;
2380 default:
2381 ret = -EINVAL;
2382 break;
2383 }
2384 return ret;
2385 }
2386
2387 /*
2388 * /dev/ttyN handling
2389 */
2390
2391 static int con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2392 {
2393 int retval;
2394
2395 retval = do_con_write(tty, buf, count);
2396 con_flush_chars(tty);
2397
2398 return retval;
2399 }
2400
2401 static void con_put_char(struct tty_struct *tty, unsigned char ch)
2402 {
2403 if (in_interrupt())
2404 return; /* n_r3964 calls put_char() from interrupt context */
2405 do_con_write(tty, &ch, 1);
2406 }
2407
2408 static int con_write_room(struct tty_struct *tty)
2409 {
2410 if (tty->stopped)
2411 return 0;
2412 return 4096; /* No limit, really; we're not buffering */
2413 }
2414
2415 static int con_chars_in_buffer(struct tty_struct *tty)
2416 {
2417 return 0; /* we're not buffering */
2418 }
2419
2420 /*
2421 * con_throttle and con_unthrottle are only used for
2422 * paste_selection(), which has to stuff in a large number of
2423 * characters...
2424 */
2425 static void con_throttle(struct tty_struct *tty)
2426 {
2427 }
2428
2429 static void con_unthrottle(struct tty_struct *tty)
2430 {
2431 struct vc_data *vc = tty->driver_data;
2432
2433 wake_up_interruptible(&vc->paste_wait);
2434 }
2435
2436 /*
2437 * Turn the Scroll-Lock LED on when the tty is stopped
2438 */
2439 static void con_stop(struct tty_struct *tty)
2440 {
2441 int console_num;
2442 if (!tty)
2443 return;
2444 console_num = tty->index;
2445 if (!vc_cons_allocated(console_num))
2446 return;
2447 set_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2448 set_leds();
2449 }
2450
2451 /*
2452 * Turn the Scroll-Lock LED off when the console is started
2453 */
2454 static void con_start(struct tty_struct *tty)
2455 {
2456 int console_num;
2457 if (!tty)
2458 return;
2459 console_num = tty->index;
2460 if (!vc_cons_allocated(console_num))
2461 return;
2462 clr_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2463 set_leds();
2464 }
2465
2466 static void con_flush_chars(struct tty_struct *tty)
2467 {
2468 struct vc_data *vc;
2469
2470 if (in_interrupt()) /* from flush_to_ldisc */
2471 return;
2472
2473 /* if we race with con_close(), vt may be null */
2474 acquire_console_sem();
2475 vc = tty->driver_data;
2476 if (vc)
2477 set_cursor(vc);
2478 release_console_sem();
2479 }
2480
2481 /*
2482 * Allocate the console screen memory.
2483 */
2484 static int con_open(struct tty_struct *tty, struct file *filp)
2485 {
2486 unsigned int currcons = tty->index;
2487 int ret = 0;
2488
2489 acquire_console_sem();
2490 if (tty->driver_data == NULL) {
2491 ret = vc_allocate(currcons);
2492 if (ret == 0) {
2493 struct vc_data *vc = vc_cons[currcons].d;
2494 tty->driver_data = vc;
2495 vc->vc_tty = tty;
2496
2497 if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
2498 tty->winsize.ws_row = vc_cons[currcons].d->vc_rows;
2499 tty->winsize.ws_col = vc_cons[currcons].d->vc_cols;
2500 }
2501 release_console_sem();
2502 vcs_make_devfs(tty);
2503 return ret;
2504 }
2505 }
2506 release_console_sem();
2507 return ret;
2508 }
2509
2510 /*
2511 * We take tty_mutex in here to prevent another thread from coming in via init_dev
2512 * and taking a ref against the tty while we're in the process of forgetting
2513 * about it and cleaning things up.
2514 *
2515 * This is because vcs_remove_devfs() can sleep and will drop the BKL.
2516 */
2517 static void con_close(struct tty_struct *tty, struct file *filp)
2518 {
2519 mutex_lock(&tty_mutex);
2520 acquire_console_sem();
2521 if (tty && tty->count == 1) {
2522 struct vc_data *vc = tty->driver_data;
2523
2524 if (vc)
2525 vc->vc_tty = NULL;
2526 tty->driver_data = NULL;
2527 release_console_sem();
2528 vcs_remove_devfs(tty);
2529 mutex_unlock(&tty_mutex);
2530 /*
2531 * tty_mutex is released, but we still hold BKL, so there is
2532 * still exclusion against init_dev()
2533 */
2534 return;
2535 }
2536 release_console_sem();
2537 mutex_unlock(&tty_mutex);
2538 }
2539
2540 static void vc_init(struct vc_data *vc, unsigned int rows,
2541 unsigned int cols, int do_clear)
2542 {
2543 int j, k ;
2544
2545 vc->vc_cols = cols;
2546 vc->vc_rows = rows;
2547 vc->vc_size_row = cols << 1;
2548 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
2549
2550 set_origin(vc);
2551 vc->vc_pos = vc->vc_origin;
2552 reset_vc(vc);
2553 for (j=k=0; j<16; j++) {
2554 vc->vc_palette[k++] = default_red[j] ;
2555 vc->vc_palette[k++] = default_grn[j] ;
2556 vc->vc_palette[k++] = default_blu[j] ;
2557 }
2558 vc->vc_def_color = 0x07; /* white */
2559 vc->vc_ulcolor = 0x0f; /* bold white */
2560 vc->vc_halfcolor = 0x08; /* grey */
2561 init_waitqueue_head(&vc->paste_wait);
2562 reset_terminal(vc, do_clear);
2563 }
2564
2565 /*
2566 * This routine initializes console interrupts, and does nothing
2567 * else. If you want the screen to clear, call tty_write with
2568 * the appropriate escape-sequence.
2569 */
2570
2571 static int __init con_init(void)
2572 {
2573 const char *display_desc = NULL;
2574 struct vc_data *vc;
2575 unsigned int currcons = 0, i;
2576
2577 acquire_console_sem();
2578
2579 if (conswitchp)
2580 display_desc = conswitchp->con_startup();
2581 if (!display_desc) {
2582 fg_console = 0;
2583 release_console_sem();
2584 return 0;
2585 }
2586
2587 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2588 struct con_driver *con_driver = &registered_con_driver[i];
2589
2590 if (con_driver->con == NULL) {
2591 con_driver->con = conswitchp;
2592 con_driver->desc = display_desc;
2593 con_driver->flag = CON_DRIVER_FLAG_INIT;
2594 con_driver->first = 0;
2595 con_driver->last = MAX_NR_CONSOLES - 1;
2596 break;
2597 }
2598 }
2599
2600 for (i = 0; i < MAX_NR_CONSOLES; i++)
2601 con_driver_map[i] = conswitchp;
2602
2603 init_timer(&console_timer);
2604 console_timer.function = blank_screen_t;
2605 if (blankinterval) {
2606 blank_state = blank_normal_wait;
2607 mod_timer(&console_timer, jiffies + blankinterval);
2608 }
2609
2610 /*
2611 * kmalloc is not running yet - we use the bootmem allocator.
2612 */
2613 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) {
2614 vc_cons[currcons].d = vc = alloc_bootmem(sizeof(struct vc_data));
2615 visual_init(vc, currcons, 1);
2616 vc->vc_screenbuf = (unsigned short *)alloc_bootmem(vc->vc_screenbuf_size);
2617 vc->vc_kmalloced = 0;
2618 vc_init(vc, vc->vc_rows, vc->vc_cols,
2619 currcons || !vc->vc_sw->con_save_screen);
2620 }
2621 currcons = fg_console = 0;
2622 master_display_fg = vc = vc_cons[currcons].d;
2623 set_origin(vc);
2624 save_screen(vc);
2625 gotoxy(vc, vc->vc_x, vc->vc_y);
2626 csi_J(vc, 0);
2627 update_screen(vc);
2628 printk("Console: %s %s %dx%d",
2629 vc->vc_can_do_color ? "colour" : "mono",
2630 display_desc, vc->vc_cols, vc->vc_rows);
2631 printable = 1;
2632 printk("\n");
2633
2634 release_console_sem();
2635
2636 #ifdef CONFIG_VT_CONSOLE
2637 register_console(&vt_console_driver);
2638 #endif
2639 return 0;
2640 }
2641 console_initcall(con_init);
2642
2643 static struct tty_operations con_ops = {
2644 .open = con_open,
2645 .close = con_close,
2646 .write = con_write,
2647 .write_room = con_write_room,
2648 .put_char = con_put_char,
2649 .flush_chars = con_flush_chars,
2650 .chars_in_buffer = con_chars_in_buffer,
2651 .ioctl = vt_ioctl,
2652 .stop = con_stop,
2653 .start = con_start,
2654 .throttle = con_throttle,
2655 .unthrottle = con_unthrottle,
2656 };
2657
2658 int __init vty_init(void)
2659 {
2660 vcs_init();
2661
2662 console_driver = alloc_tty_driver(MAX_NR_CONSOLES);
2663 if (!console_driver)
2664 panic("Couldn't allocate console driver\n");
2665 console_driver->owner = THIS_MODULE;
2666 console_driver->devfs_name = "vc/";
2667 console_driver->name = "tty";
2668 console_driver->name_base = 1;
2669 console_driver->major = TTY_MAJOR;
2670 console_driver->minor_start = 1;
2671 console_driver->type = TTY_DRIVER_TYPE_CONSOLE;
2672 console_driver->init_termios = tty_std_termios;
2673 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS;
2674 tty_set_operations(console_driver, &con_ops);
2675 if (tty_register_driver(console_driver))
2676 panic("Couldn't register console driver\n");
2677
2678 kbd_init();
2679 console_map_init();
2680 #ifdef CONFIG_PROM_CONSOLE
2681 prom_con_init();
2682 #endif
2683 #ifdef CONFIG_MDA_CONSOLE
2684 mda_console_init();
2685 #endif
2686 return 0;
2687 }
2688
2689 #ifndef VT_SINGLE_DRIVER
2690 #include <linux/device.h>
2691
2692 static struct class *vtconsole_class;
2693
2694 static int bind_con_driver(const struct consw *csw, int first, int last,
2695 int deflt)
2696 {
2697 struct module *owner = csw->owner;
2698 const char *desc = NULL;
2699 struct con_driver *con_driver;
2700 int i, j = -1, k = -1, retval = -ENODEV;
2701
2702 if (!try_module_get(owner))
2703 return -ENODEV;
2704
2705 acquire_console_sem();
2706
2707 /* check if driver is registered */
2708 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2709 con_driver = &registered_con_driver[i];
2710
2711 if (con_driver->con == csw) {
2712 desc = con_driver->desc;
2713 retval = 0;
2714 break;
2715 }
2716 }
2717
2718 if (retval)
2719 goto err;
2720
2721 if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) {
2722 csw->con_startup();
2723 con_driver->flag |= CON_DRIVER_FLAG_INIT;
2724 }
2725
2726 if (deflt) {
2727 if (conswitchp)
2728 module_put(conswitchp->owner);
2729
2730 __module_get(owner);
2731 conswitchp = csw;
2732 }
2733
2734 first = max(first, con_driver->first);
2735 last = min(last, con_driver->last);
2736
2737 for (i = first; i <= last; i++) {
2738 int old_was_color;
2739 struct vc_data *vc = vc_cons[i].d;
2740
2741 if (con_driver_map[i])
2742 module_put(con_driver_map[i]->owner);
2743 __module_get(owner);
2744 con_driver_map[i] = csw;
2745
2746 if (!vc || !vc->vc_sw)
2747 continue;
2748
2749 j = i;
2750
2751 if (CON_IS_VISIBLE(vc)) {
2752 k = i;
2753 save_screen(vc);
2754 }
2755
2756 old_was_color = vc->vc_can_do_color;
2757 vc->vc_sw->con_deinit(vc);
2758 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
2759 visual_init(vc, i, 0);
2760 set_origin(vc);
2761 update_attr(vc);
2762
2763 /* If the console changed between mono <-> color, then
2764 * the attributes in the screenbuf will be wrong. The
2765 * following resets all attributes to something sane.
2766 */
2767 if (old_was_color != vc->vc_can_do_color)
2768 clear_buffer_attributes(vc);
2769 }
2770
2771 printk("Console: switching ");
2772 if (!deflt)
2773 printk("consoles %d-%d ", first+1, last+1);
2774 if (j >= 0) {
2775 struct vc_data *vc = vc_cons[j].d;
2776
2777 printk("to %s %s %dx%d\n",
2778 vc->vc_can_do_color ? "colour" : "mono",
2779 desc, vc->vc_cols, vc->vc_rows);
2780
2781 if (k >= 0) {
2782 vc = vc_cons[k].d;
2783 update_screen(vc);
2784 }
2785 } else
2786 printk("to %s\n", desc);
2787
2788 retval = 0;
2789 err:
2790 release_console_sem();
2791 module_put(owner);
2792 return retval;
2793 };
2794
2795 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
2796 static int con_is_graphics(const struct consw *csw, int first, int last)
2797 {
2798 int i, retval = 0;
2799
2800 for (i = first; i <= last; i++) {
2801 struct vc_data *vc = vc_cons[i].d;
2802
2803 if (vc && vc->vc_mode == KD_GRAPHICS) {
2804 retval = 1;
2805 break;
2806 }
2807 }
2808
2809 return retval;
2810 }
2811
2812 static int unbind_con_driver(const struct consw *csw, int first, int last,
2813 int deflt)
2814 {
2815 struct module *owner = csw->owner;
2816 const struct consw *defcsw = NULL;
2817 struct con_driver *con_driver = NULL, *con_back = NULL;
2818 int i, retval = -ENODEV;
2819
2820 if (!try_module_get(owner))
2821 return -ENODEV;
2822
2823 acquire_console_sem();
2824
2825 /* check if driver is registered and if it is unbindable */
2826 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2827 con_driver = &registered_con_driver[i];
2828
2829 if (con_driver->con == csw &&
2830 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
2831 retval = 0;
2832 break;
2833 }
2834 }
2835
2836 if (retval) {
2837 release_console_sem();
2838 goto err;
2839 }
2840
2841 retval = -ENODEV;
2842
2843 /* check if backup driver exists */
2844 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2845 con_back = &registered_con_driver[i];
2846
2847 if (con_back->con &&
2848 !(con_back->flag & CON_DRIVER_FLAG_MODULE)) {
2849 defcsw = con_back->con;
2850 retval = 0;
2851 break;
2852 }
2853 }
2854
2855 if (retval) {
2856 release_console_sem();
2857 goto err;
2858 }
2859
2860 if (!con_is_bound(csw)) {
2861 release_console_sem();
2862 goto err;
2863 }
2864
2865 first = max(first, con_driver->first);
2866 last = min(last, con_driver->last);
2867
2868 for (i = first; i <= last; i++) {
2869 if (con_driver_map[i] == csw) {
2870 module_put(csw->owner);
2871 con_driver_map[i] = NULL;
2872 }
2873 }
2874
2875 if (!con_is_bound(defcsw)) {
2876 const struct consw *defconsw = conswitchp;
2877
2878 defcsw->con_startup();
2879 con_back->flag |= CON_DRIVER_FLAG_INIT;
2880 /*
2881 * vgacon may change the default driver to point
2882 * to dummycon, we restore it here...
2883 */
2884 conswitchp = defconsw;
2885 }
2886
2887 if (!con_is_bound(csw))
2888 con_driver->flag &= ~CON_DRIVER_FLAG_INIT;
2889
2890 release_console_sem();
2891 /* ignore return value, binding should not fail */
2892 bind_con_driver(defcsw, first, last, deflt);
2893 err:
2894 module_put(owner);
2895 return retval;
2896
2897 }
2898
2899 static int vt_bind(struct con_driver *con)
2900 {
2901 const struct consw *defcsw = NULL, *csw = NULL;
2902 int i, more = 1, first = -1, last = -1, deflt = 0;
2903
2904 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
2905 con_is_graphics(con->con, con->first, con->last))
2906 goto err;
2907
2908 csw = con->con;
2909
2910 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2911 struct con_driver *con = &registered_con_driver[i];
2912
2913 if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) {
2914 defcsw = con->con;
2915 break;
2916 }
2917 }
2918
2919 if (!defcsw)
2920 goto err;
2921
2922 while (more) {
2923 more = 0;
2924
2925 for (i = con->first; i <= con->last; i++) {
2926 if (con_driver_map[i] == defcsw) {
2927 if (first == -1)
2928 first = i;
2929 last = i;
2930 more = 1;
2931 } else if (first != -1)
2932 break;
2933 }
2934
2935 if (first == 0 && last == MAX_NR_CONSOLES -1)
2936 deflt = 1;
2937
2938 if (first != -1)
2939 bind_con_driver(csw, first, last, deflt);
2940
2941 first = -1;
2942 last = -1;
2943 deflt = 0;
2944 }
2945
2946 err:
2947 return 0;
2948 }
2949
2950 static int vt_unbind(struct con_driver *con)
2951 {
2952 const struct consw *csw = NULL;
2953 int i, more = 1, first = -1, last = -1, deflt = 0;
2954
2955 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
2956 con_is_graphics(con->con, con->first, con->last))
2957 goto err;
2958
2959 csw = con->con;
2960
2961 while (more) {
2962 more = 0;
2963
2964 for (i = con->first; i <= con->last; i++) {
2965 if (con_driver_map[i] == csw) {
2966 if (first == -1)
2967 first = i;
2968 last = i;
2969 more = 1;
2970 } else if (first != -1)
2971 break;
2972 }
2973
2974 if (first == 0 && last == MAX_NR_CONSOLES -1)
2975 deflt = 1;
2976
2977 if (first != -1)
2978 unbind_con_driver(csw, first, last, deflt);
2979
2980 first = -1;
2981 last = -1;
2982 deflt = 0;
2983 }
2984
2985 err:
2986 return 0;
2987 }
2988 #else
2989 static inline int vt_bind(struct con_driver *con)
2990 {
2991 return 0;
2992 }
2993 static inline int vt_unbind(struct con_driver *con)
2994 {
2995 return 0;
2996 }
2997 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
2998
2999 static ssize_t store_bind(struct class_device *class_device,
3000 const char *buf, size_t count)
3001 {
3002 struct con_driver *con = class_get_devdata(class_device);
3003 int bind = simple_strtoul(buf, NULL, 0);
3004
3005 if (bind)
3006 vt_bind(con);
3007 else
3008 vt_unbind(con);
3009
3010 return count;
3011 }
3012
3013 static ssize_t show_bind(struct class_device *class_device, char *buf)
3014 {
3015 struct con_driver *con = class_get_devdata(class_device);
3016 int bind = con_is_bound(con->con);
3017
3018 return snprintf(buf, PAGE_SIZE, "%i\n", bind);
3019 }
3020
3021 static ssize_t show_name(struct class_device *class_device, char *buf)
3022 {
3023 struct con_driver *con = class_get_devdata(class_device);
3024
3025 return snprintf(buf, PAGE_SIZE, "%s %s\n",
3026 (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)",
3027 con->desc);
3028
3029 }
3030
3031 static struct class_device_attribute class_device_attrs[] = {
3032 __ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind),
3033 __ATTR(name, S_IRUGO, show_name, NULL),
3034 };
3035
3036 static int vtconsole_init_class_device(struct con_driver *con)
3037 {
3038 int i;
3039
3040 class_set_devdata(con->class_dev, con);
3041 for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++)
3042 class_device_create_file(con->class_dev,
3043 &class_device_attrs[i]);
3044
3045 return 0;
3046 }
3047
3048 static void vtconsole_deinit_class_device(struct con_driver *con)
3049 {
3050 int i;
3051
3052 for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++)
3053 class_device_remove_file(con->class_dev,
3054 &class_device_attrs[i]);
3055 }
3056
3057 /**
3058 * con_is_bound - checks if driver is bound to the console
3059 * @csw: console driver
3060 *
3061 * RETURNS: zero if unbound, nonzero if bound
3062 *
3063 * Drivers can call this and if zero, they should release
3064 * all resources allocated on con_startup()
3065 */
3066 int con_is_bound(const struct consw *csw)
3067 {
3068 int i, bound = 0;
3069
3070 for (i = 0; i < MAX_NR_CONSOLES; i++) {
3071 if (con_driver_map[i] == csw) {
3072 bound = 1;
3073 break;
3074 }
3075 }
3076
3077 return bound;
3078 }
3079 EXPORT_SYMBOL(con_is_bound);
3080
3081 /**
3082 * register_con_driver - register console driver to console layer
3083 * @csw: console driver
3084 * @first: the first console to take over, minimum value is 0
3085 * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1
3086 *
3087 * DESCRIPTION: This function registers a console driver which can later
3088 * bind to a range of consoles specified by @first and @last. It will
3089 * also initialize the console driver by calling con_startup().
3090 */
3091 int register_con_driver(const struct consw *csw, int first, int last)
3092 {
3093 struct module *owner = csw->owner;
3094 struct con_driver *con_driver;
3095 const char *desc;
3096 int i, retval = 0;
3097
3098 if (!try_module_get(owner))
3099 return -ENODEV;
3100
3101 acquire_console_sem();
3102
3103 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3104 con_driver = &registered_con_driver[i];
3105
3106 /* already registered */
3107 if (con_driver->con == csw)
3108 retval = -EINVAL;
3109 }
3110
3111 if (retval)
3112 goto err;
3113
3114 desc = csw->con_startup();
3115
3116 if (!desc)
3117 goto err;
3118
3119 retval = -EINVAL;
3120
3121 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3122 con_driver = &registered_con_driver[i];
3123
3124 if (con_driver->con == NULL) {
3125 con_driver->con = csw;
3126 con_driver->desc = desc;
3127 con_driver->node = i;
3128 con_driver->flag = CON_DRIVER_FLAG_MODULE |
3129 CON_DRIVER_FLAG_INIT;
3130 con_driver->first = first;
3131 con_driver->last = last;
3132 retval = 0;
3133 break;
3134 }
3135 }
3136
3137 if (retval)
3138 goto err;
3139
3140 con_driver->class_dev = class_device_create(vtconsole_class, NULL,
3141 MKDEV(0, con_driver->node),
3142 NULL, "vtcon%i",
3143 con_driver->node);
3144
3145 if (IS_ERR(con_driver->class_dev)) {
3146 printk(KERN_WARNING "Unable to create class_device for %s; "
3147 "errno = %ld\n", con_driver->desc,
3148 PTR_ERR(con_driver->class_dev));
3149 con_driver->class_dev = NULL;
3150 } else {
3151 vtconsole_init_class_device(con_driver);
3152 }
3153 err:
3154 release_console_sem();
3155 module_put(owner);
3156 return retval;
3157 }
3158 EXPORT_SYMBOL(register_con_driver);
3159
3160 /**
3161 * unregister_con_driver - unregister console driver from console layer
3162 * @csw: console driver
3163 *
3164 * DESCRIPTION: All drivers that registers to the console layer must
3165 * call this function upon exit, or if the console driver is in a state
3166 * where it won't be able to handle console services, such as the
3167 * framebuffer console without loaded framebuffer drivers.
3168 *
3169 * The driver must unbind first prior to unregistration.
3170 */
3171 int unregister_con_driver(const struct consw *csw)
3172 {
3173 int i, retval = -ENODEV;
3174
3175 acquire_console_sem();
3176
3177 /* cannot unregister a bound driver */
3178 if (con_is_bound(csw))
3179 goto err;
3180
3181 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3182 struct con_driver *con_driver = &registered_con_driver[i];
3183
3184 if (con_driver->con == csw &&
3185 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3186 vtconsole_deinit_class_device(con_driver);
3187 class_device_destroy(vtconsole_class,
3188 MKDEV(0, con_driver->node));
3189 con_driver->con = NULL;
3190 con_driver->desc = NULL;
3191 con_driver->class_dev = NULL;
3192 con_driver->node = 0;
3193 con_driver->flag = 0;
3194 con_driver->first = 0;
3195 con_driver->last = 0;
3196 retval = 0;
3197 break;
3198 }
3199 }
3200 err:
3201 release_console_sem();
3202 return retval;
3203 }
3204 EXPORT_SYMBOL(unregister_con_driver);
3205
3206 /*
3207 * If we support more console drivers, this function is used
3208 * when a driver wants to take over some existing consoles
3209 * and become default driver for newly opened ones.
3210 *
3211 * take_over_console is basically a register followed by unbind
3212 */
3213 int take_over_console(const struct consw *csw, int first, int last, int deflt)
3214 {
3215 int err;
3216
3217 err = register_con_driver(csw, first, last);
3218
3219 if (!err)
3220 bind_con_driver(csw, first, last, deflt);
3221
3222 return err;
3223 }
3224
3225 /*
3226 * give_up_console is a wrapper to unregister_con_driver. It will only
3227 * work if driver is fully unbound.
3228 */
3229 void give_up_console(const struct consw *csw)
3230 {
3231 unregister_con_driver(csw);
3232 }
3233
3234 static int __init vtconsole_class_init(void)
3235 {
3236 int i;
3237
3238 vtconsole_class = class_create(THIS_MODULE, "vtconsole");
3239 if (IS_ERR(vtconsole_class)) {
3240 printk(KERN_WARNING "Unable to create vt console class; "
3241 "errno = %ld\n", PTR_ERR(vtconsole_class));
3242 vtconsole_class = NULL;
3243 }
3244
3245 /* Add system drivers to sysfs */
3246 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3247 struct con_driver *con = &registered_con_driver[i];
3248
3249 if (con->con && !con->class_dev) {
3250 con->class_dev =
3251 class_device_create(vtconsole_class, NULL,
3252 MKDEV(0, con->node), NULL,
3253 "vtcon%i", con->node);
3254
3255 if (IS_ERR(con->class_dev)) {
3256 printk(KERN_WARNING "Unable to create "
3257 "class_device for %s; errno = %ld\n",
3258 con->desc, PTR_ERR(con->class_dev));
3259 con->class_dev = NULL;
3260 } else {
3261 vtconsole_init_class_device(con);
3262 }
3263 }
3264 }
3265
3266 return 0;
3267 }
3268 postcore_initcall(vtconsole_class_init);
3269
3270 #endif
3271
3272 /*
3273 * Screen blanking
3274 */
3275
3276 static void set_vesa_blanking(char __user *p)
3277 {
3278 unsigned int mode;
3279 get_user(mode, p + 1);
3280 vesa_blank_mode = (mode < 4) ? mode : 0;
3281 }
3282
3283 void do_blank_screen(int entering_gfx)
3284 {
3285 struct vc_data *vc = vc_cons[fg_console].d;
3286 int i;
3287
3288 WARN_CONSOLE_UNLOCKED();
3289
3290 if (console_blanked) {
3291 if (blank_state == blank_vesa_wait) {
3292 blank_state = blank_off;
3293 vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0);
3294 }
3295 return;
3296 }
3297 if (blank_state != blank_normal_wait)
3298 return;
3299 blank_state = blank_off;
3300
3301 /* entering graphics mode? */
3302 if (entering_gfx) {
3303 hide_cursor(vc);
3304 save_screen(vc);
3305 vc->vc_sw->con_blank(vc, -1, 1);
3306 console_blanked = fg_console + 1;
3307 set_origin(vc);
3308 return;
3309 }
3310
3311 /* don't blank graphics */
3312 if (vc->vc_mode != KD_TEXT) {
3313 console_blanked = fg_console + 1;
3314 return;
3315 }
3316
3317 hide_cursor(vc);
3318 del_timer_sync(&console_timer);
3319 blank_timer_expired = 0;
3320
3321 save_screen(vc);
3322 /* In case we need to reset origin, blanking hook returns 1 */
3323 i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0);
3324 console_blanked = fg_console + 1;
3325 if (i)
3326 set_origin(vc);
3327
3328 if (console_blank_hook && console_blank_hook(1))
3329 return;
3330
3331 if (vesa_off_interval && vesa_blank_mode) {
3332 blank_state = blank_vesa_wait;
3333 mod_timer(&console_timer, jiffies + vesa_off_interval);
3334 }
3335 }
3336 EXPORT_SYMBOL(do_blank_screen);
3337
3338 /*
3339 * Called by timer as well as from vt_console_driver
3340 */
3341 void do_unblank_screen(int leaving_gfx)
3342 {
3343 struct vc_data *vc;
3344
3345 /* This should now always be called from a "sane" (read: can schedule)
3346 * context for the sake of the low level drivers, except in the special
3347 * case of oops_in_progress
3348 */
3349 if (!oops_in_progress)
3350 might_sleep();
3351
3352 WARN_CONSOLE_UNLOCKED();
3353
3354 ignore_poke = 0;
3355 if (!console_blanked)
3356 return;
3357 if (!vc_cons_allocated(fg_console)) {
3358 /* impossible */
3359 printk("unblank_screen: tty %d not allocated ??\n", fg_console+1);
3360 return;
3361 }
3362 vc = vc_cons[fg_console].d;
3363 if (vc->vc_mode != KD_TEXT)
3364 return; /* but leave console_blanked != 0 */
3365
3366 if (blankinterval) {
3367 mod_timer(&console_timer, jiffies + blankinterval);
3368 blank_state = blank_normal_wait;
3369 }
3370
3371 console_blanked = 0;
3372 if (vc->vc_sw->con_blank(vc, 0, leaving_gfx))
3373 /* Low-level driver cannot restore -> do it ourselves */
3374 update_screen(vc);
3375 if (console_blank_hook)
3376 console_blank_hook(0);
3377 set_palette(vc);
3378 set_cursor(vc);
3379 }
3380 EXPORT_SYMBOL(do_unblank_screen);
3381
3382 /*
3383 * This is called by the outside world to cause a forced unblank, mostly for
3384 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
3385 * call it with 1 as an argument and so force a mode restore... that may kill
3386 * X or at least garbage the screen but would also make the Oops visible...
3387 */
3388 void unblank_screen(void)
3389 {
3390 do_unblank_screen(0);
3391 }
3392
3393 /*
3394 * We defer the timer blanking to work queue so it can take the console mutex
3395 * (console operations can still happen at irq time, but only from printk which
3396 * has the console mutex. Not perfect yet, but better than no locking
3397 */
3398 static void blank_screen_t(unsigned long dummy)
3399 {
3400 if (unlikely(!keventd_up())) {
3401 mod_timer(&console_timer, jiffies + blankinterval);
3402 return;
3403 }
3404 blank_timer_expired = 1;
3405 schedule_work(&console_work);
3406 }
3407
3408 void poke_blanked_console(void)
3409 {
3410 WARN_CONSOLE_UNLOCKED();
3411
3412 /* Add this so we quickly catch whoever might call us in a non
3413 * safe context. Nowadays, unblank_screen() isn't to be called in
3414 * atomic contexts and is allowed to schedule (with the special case
3415 * of oops_in_progress, but that isn't of any concern for this
3416 * function. --BenH.
3417 */
3418 might_sleep();
3419
3420 /* This isn't perfectly race free, but a race here would be mostly harmless,
3421 * at worse, we'll do a spurrious blank and it's unlikely
3422 */
3423 del_timer(&console_timer);
3424 blank_timer_expired = 0;
3425
3426 if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS)
3427 return;
3428 if (console_blanked)
3429 unblank_screen();
3430 else if (blankinterval) {
3431 mod_timer(&console_timer, jiffies + blankinterval);
3432 blank_state = blank_normal_wait;
3433 }
3434 }
3435
3436 /*
3437 * Palettes
3438 */
3439
3440 static void set_palette(struct vc_data *vc)
3441 {
3442 WARN_CONSOLE_UNLOCKED();
3443
3444 if (vc->vc_mode != KD_GRAPHICS)
3445 vc->vc_sw->con_set_palette(vc, color_table);
3446 }
3447
3448 static int set_get_cmap(unsigned char __user *arg, int set)
3449 {
3450 int i, j, k;
3451
3452 WARN_CONSOLE_UNLOCKED();
3453
3454 for (i = 0; i < 16; i++)
3455 if (set) {
3456 get_user(default_red[i], arg++);
3457 get_user(default_grn[i], arg++);
3458 get_user(default_blu[i], arg++);
3459 } else {
3460 put_user(default_red[i], arg++);
3461 put_user(default_grn[i], arg++);
3462 put_user(default_blu[i], arg++);
3463 }
3464 if (set) {
3465 for (i = 0; i < MAX_NR_CONSOLES; i++)
3466 if (vc_cons_allocated(i)) {
3467 for (j = k = 0; j < 16; j++) {
3468 vc_cons[i].d->vc_palette[k++] = default_red[j];
3469 vc_cons[i].d->vc_palette[k++] = default_grn[j];
3470 vc_cons[i].d->vc_palette[k++] = default_blu[j];
3471 }
3472 set_palette(vc_cons[i].d);
3473 }
3474 }
3475 return 0;
3476 }
3477
3478 /*
3479 * Load palette into the DAC registers. arg points to a colour
3480 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
3481 */
3482
3483 int con_set_cmap(unsigned char __user *arg)
3484 {
3485 int rc;
3486
3487 acquire_console_sem();
3488 rc = set_get_cmap (arg,1);
3489 release_console_sem();
3490
3491 return rc;
3492 }
3493
3494 int con_get_cmap(unsigned char __user *arg)
3495 {
3496 int rc;
3497
3498 acquire_console_sem();
3499 rc = set_get_cmap (arg,0);
3500 release_console_sem();
3501
3502 return rc;
3503 }
3504
3505 void reset_palette(struct vc_data *vc)
3506 {
3507 int j, k;
3508 for (j=k=0; j<16; j++) {
3509 vc->vc_palette[k++] = default_red[j];
3510 vc->vc_palette[k++] = default_grn[j];
3511 vc->vc_palette[k++] = default_blu[j];
3512 }
3513 set_palette(vc);
3514 }
3515
3516 /*
3517 * Font switching
3518 *
3519 * Currently we only support fonts up to 32 pixels wide, at a maximum height
3520 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
3521 * depending on width) reserved for each character which is kinda wasty, but
3522 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
3523 * is upto the actual low-level console-driver convert data into its favorite
3524 * format (maybe we should add a `fontoffset' field to the `display'
3525 * structure so we won't have to convert the fontdata all the time.
3526 * /Jes
3527 */
3528
3529 #define max_font_size 65536
3530
3531 static int con_font_get(struct vc_data *vc, struct console_font_op *op)
3532 {
3533 struct console_font font;
3534 int rc = -EINVAL;
3535 int c;
3536
3537 if (vc->vc_mode != KD_TEXT)
3538 return -EINVAL;
3539
3540 if (op->data) {
3541 font.data = kmalloc(max_font_size, GFP_KERNEL);
3542 if (!font.data)
3543 return -ENOMEM;
3544 } else
3545 font.data = NULL;
3546
3547 acquire_console_sem();
3548 if (vc->vc_sw->con_font_get)
3549 rc = vc->vc_sw->con_font_get(vc, &font);
3550 else
3551 rc = -ENOSYS;
3552 release_console_sem();
3553
3554 if (rc)
3555 goto out;
3556
3557 c = (font.width+7)/8 * 32 * font.charcount;
3558
3559 if (op->data && font.charcount > op->charcount)
3560 rc = -ENOSPC;
3561 if (!(op->flags & KD_FONT_FLAG_OLD)) {
3562 if (font.width > op->width || font.height > op->height)
3563 rc = -ENOSPC;
3564 } else {
3565 if (font.width != 8)
3566 rc = -EIO;
3567 else if ((op->height && font.height > op->height) ||
3568 font.height > 32)
3569 rc = -ENOSPC;
3570 }
3571 if (rc)
3572 goto out;
3573
3574 op->height = font.height;
3575 op->width = font.width;
3576 op->charcount = font.charcount;
3577
3578 if (op->data && copy_to_user(op->data, font.data, c))
3579 rc = -EFAULT;
3580
3581 out:
3582 kfree(font.data);
3583 return rc;
3584 }
3585
3586 static int con_font_set(struct vc_data *vc, struct console_font_op *op)
3587 {
3588 struct console_font font;
3589 int rc = -EINVAL;
3590 int size;
3591
3592 if (vc->vc_mode != KD_TEXT)
3593 return -EINVAL;
3594 if (!op->data)
3595 return -EINVAL;
3596 if (op->charcount > 512)
3597 return -EINVAL;
3598 if (!op->height) { /* Need to guess font height [compat] */
3599 int h, i;
3600 u8 __user *charmap = op->data;
3601 u8 tmp;
3602
3603 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
3604 so that we can get rid of this soon */
3605 if (!(op->flags & KD_FONT_FLAG_OLD))
3606 return -EINVAL;
3607 for (h = 32; h > 0; h--)
3608 for (i = 0; i < op->charcount; i++) {
3609 if (get_user(tmp, &charmap[32*i+h-1]))
3610 return -EFAULT;
3611 if (tmp)
3612 goto nonzero;
3613 }
3614 return -EINVAL;
3615 nonzero:
3616 op->height = h;
3617 }
3618 if (op->width <= 0 || op->width > 32 || op->height > 32)
3619 return -EINVAL;
3620 size = (op->width+7)/8 * 32 * op->charcount;
3621 if (size > max_font_size)
3622 return -ENOSPC;
3623 font.charcount = op->charcount;
3624 font.height = op->height;
3625 font.width = op->width;
3626 font.data = kmalloc(size, GFP_KERNEL);
3627 if (!font.data)
3628 return -ENOMEM;
3629 if (copy_from_user(font.data, op->data, size)) {
3630 kfree(font.data);
3631 return -EFAULT;
3632 }
3633 acquire_console_sem();
3634 if (vc->vc_sw->con_font_set)
3635 rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
3636 else
3637 rc = -ENOSYS;
3638 release_console_sem();
3639 kfree(font.data);
3640 return rc;
3641 }
3642
3643 static int con_font_default(struct vc_data *vc, struct console_font_op *op)
3644 {
3645 struct console_font font = {.width = op->width, .height = op->height};
3646 char name[MAX_FONT_NAME];
3647 char *s = name;
3648 int rc;
3649
3650 if (vc->vc_mode != KD_TEXT)
3651 return -EINVAL;
3652
3653 if (!op->data)
3654 s = NULL;
3655 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0)
3656 return -EFAULT;
3657 else
3658 name[MAX_FONT_NAME - 1] = 0;
3659
3660 acquire_console_sem();
3661 if (vc->vc_sw->con_font_default)
3662 rc = vc->vc_sw->con_font_default(vc, &font, s);
3663 else
3664 rc = -ENOSYS;
3665 release_console_sem();
3666 if (!rc) {
3667 op->width = font.width;
3668 op->height = font.height;
3669 }
3670 return rc;
3671 }
3672
3673 static int con_font_copy(struct vc_data *vc, struct console_font_op *op)
3674 {
3675 int con = op->height;
3676 int rc;
3677
3678 if (vc->vc_mode != KD_TEXT)
3679 return -EINVAL;
3680
3681 acquire_console_sem();
3682 if (!vc->vc_sw->con_font_copy)
3683 rc = -ENOSYS;
3684 else if (con < 0 || !vc_cons_allocated(con))
3685 rc = -ENOTTY;
3686 else if (con == vc->vc_num) /* nothing to do */
3687 rc = 0;
3688 else
3689 rc = vc->vc_sw->con_font_copy(vc, con);
3690 release_console_sem();
3691 return rc;
3692 }
3693
3694 int con_font_op(struct vc_data *vc, struct console_font_op *op)
3695 {
3696 switch (op->op) {
3697 case KD_FONT_OP_SET:
3698 return con_font_set(vc, op);
3699 case KD_FONT_OP_GET:
3700 return con_font_get(vc, op);
3701 case KD_FONT_OP_SET_DEFAULT:
3702 return con_font_default(vc, op);
3703 case KD_FONT_OP_COPY:
3704 return con_font_copy(vc, op);
3705 }
3706 return -ENOSYS;
3707 }
3708
3709 /*
3710 * Interface exported to selection and vcs.
3711 */
3712
3713 /* used by selection */
3714 u16 screen_glyph(struct vc_data *vc, int offset)
3715 {
3716 u16 w = scr_readw(screenpos(vc, offset, 1));
3717 u16 c = w & 0xff;
3718
3719 if (w & vc->vc_hi_font_mask)
3720 c |= 0x100;
3721 return c;
3722 }
3723
3724 /* used by vcs - note the word offset */
3725 unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed)
3726 {
3727 return screenpos(vc, 2 * w_offset, viewed);
3728 }
3729
3730 void getconsxy(struct vc_data *vc, unsigned char *p)
3731 {
3732 p[0] = vc->vc_x;
3733 p[1] = vc->vc_y;
3734 }
3735
3736 void putconsxy(struct vc_data *vc, unsigned char *p)
3737 {
3738 hide_cursor(vc);
3739 gotoxy(vc, p[0], p[1]);
3740 set_cursor(vc);
3741 }
3742
3743 u16 vcs_scr_readw(struct vc_data *vc, const u16 *org)
3744 {
3745 if ((unsigned long)org == vc->vc_pos && softcursor_original != -1)
3746 return softcursor_original;
3747 return scr_readw(org);
3748 }
3749
3750 void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org)
3751 {
3752 scr_writew(val, org);
3753 if ((unsigned long)org == vc->vc_pos) {
3754 softcursor_original = -1;
3755 add_softcursor(vc);
3756 }
3757 }
3758
3759 /*
3760 * Visible symbols for modules
3761 */
3762
3763 EXPORT_SYMBOL(color_table);
3764 EXPORT_SYMBOL(default_red);
3765 EXPORT_SYMBOL(default_grn);
3766 EXPORT_SYMBOL(default_blu);
3767 EXPORT_SYMBOL(update_region);
3768 EXPORT_SYMBOL(redraw_screen);
3769 EXPORT_SYMBOL(vc_resize);
3770 EXPORT_SYMBOL(fg_console);
3771 EXPORT_SYMBOL(console_blank_hook);
3772 EXPORT_SYMBOL(console_blanked);
3773 EXPORT_SYMBOL(vc_cons);
3774 #ifndef VT_SINGLE_DRIVER
3775 EXPORT_SYMBOL(take_over_console);
3776 EXPORT_SYMBOL(give_up_console);
3777 #endif
Linux kernel - Deliverables
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