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[MIPS] Use common definitions from asm-generic/signal.h
[linux-2.6/linux-mips/linux-dm7025.git] / drivers / char / vt.c
blobda7e66a2a38b5dcda25270c6b4329069f36a886f
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/vt_kern.h>
83 #include <linux/selection.h>
84 #include <linux/tiocl.h>
85 #include <linux/kbd_kern.h>
86 #include <linux/consolemap.h>
87 #include <linux/timer.h>
88 #include <linux/interrupt.h>
89 #include <linux/workqueue.h>
90 #include <linux/bootmem.h>
91 #include <linux/pm.h>
92 #include <linux/font.h>
93 #include <linux/bitops.h>
94
95 #include <asm/io.h>
96 #include <asm/system.h>
97 #include <asm/uaccess.h>
98
99 #define MAX_NR_CON_DRIVER 16
100
101 #define CON_DRIVER_FLAG_MODULE 1
102 #define CON_DRIVER_FLAG_INIT 2
103
104 struct con_driver {
105 const struct consw *con;
106 const char *desc;
107 struct class_device *class_dev;
108 int node;
109 int first;
110 int last;
111 int flag;
112 };
113
114 static struct con_driver registered_con_driver[MAX_NR_CON_DRIVER];
115 const struct consw *conswitchp;
116
117 /* A bitmap for codes <32. A bit of 1 indicates that the code
118 * corresponding to that bit number invokes some special action
119 * (such as cursor movement) and should not be displayed as a
120 * glyph unless the disp_ctrl mode is explicitly enabled.
121 */
122 #define CTRL_ACTION 0x0d00ff81
123 #define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */
124
125 /*
126 * Here is the default bell parameters: 750HZ, 1/8th of a second
127 */
128 #define DEFAULT_BELL_PITCH 750
129 #define DEFAULT_BELL_DURATION (HZ/8)
130
131 extern void vcs_make_devfs(struct tty_struct *tty);
132 extern void vcs_remove_devfs(struct tty_struct *tty);
133
134 extern void console_map_init(void);
135 #ifdef CONFIG_PROM_CONSOLE
136 extern void prom_con_init(void);
137 #endif
138 #ifdef CONFIG_MDA_CONSOLE
139 extern int mda_console_init(void);
140 #endif
141
142 struct vc vc_cons [MAX_NR_CONSOLES];
143
144 #ifndef VT_SINGLE_DRIVER
145 static const struct consw *con_driver_map[MAX_NR_CONSOLES];
146 #endif
147
148 static int con_open(struct tty_struct *, struct file *);
149 static void vc_init(struct vc_data *vc, unsigned int rows,
150 unsigned int cols, int do_clear);
151 static void gotoxy(struct vc_data *vc, int new_x, int new_y);
152 static void save_cur(struct vc_data *vc);
153 static void reset_terminal(struct vc_data *vc, int do_clear);
154 static void con_flush_chars(struct tty_struct *tty);
155 static void set_vesa_blanking(char __user *p);
156 static void set_cursor(struct vc_data *vc);
157 static void hide_cursor(struct vc_data *vc);
158 static void console_callback(void *ignored);
159 static void blank_screen_t(unsigned long dummy);
160 static void set_palette(struct vc_data *vc);
161
162 static int printable; /* Is console ready for printing? */
163
164 /*
165 * ignore_poke: don't unblank the screen when things are typed. This is
166 * mainly for the privacy of braille terminal users.
167 */
168 static int ignore_poke;
169
170 int do_poke_blanked_console;
171 int console_blanked;
172
173 static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
174 static int blankinterval = 10*60*HZ;
175 static int vesa_off_interval;
176
177 static DECLARE_WORK(console_work, console_callback, NULL);
178
179 /*
180 * fg_console is the current virtual console,
181 * last_console is the last used one,
182 * want_console is the console we want to switch to,
183 * kmsg_redirect is the console for kernel messages,
184 */
185 int fg_console;
186 int last_console;
187 int want_console = -1;
188 int kmsg_redirect;
189
190 /*
191 * For each existing display, we have a pointer to console currently visible
192 * on that display, allowing consoles other than fg_console to be refreshed
193 * appropriately. Unless the low-level driver supplies its own display_fg
194 * variable, we use this one for the "master display".
195 */
196 static struct vc_data *master_display_fg;
197
198 /*
199 * Unfortunately, we need to delay tty echo when we're currently writing to the
200 * console since the code is (and always was) not re-entrant, so we schedule
201 * all flip requests to process context with schedule-task() and run it from
202 * console_callback().
203 */
204
205 /*
206 * For the same reason, we defer scrollback to the console callback.
207 */
208 static int scrollback_delta;
209
210 /*
211 * Hook so that the power management routines can (un)blank
212 * the console on our behalf.
213 */
214 int (*console_blank_hook)(int);
215
216 static struct timer_list console_timer;
217 static int blank_state;
218 static int blank_timer_expired;
219 enum {
220 blank_off = 0,
221 blank_normal_wait,
222 blank_vesa_wait,
223 };
224
225 /*
226 * Low-Level Functions
227 */
228
229 #define IS_FG(vc) ((vc)->vc_num == fg_console)
230
231 #ifdef VT_BUF_VRAM_ONLY
232 #define DO_UPDATE(vc) 0
233 #else
234 #define DO_UPDATE(vc) CON_IS_VISIBLE(vc)
235 #endif
236
237 static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed)
238 {
239 unsigned short *p;
240
241 if (!viewed)
242 p = (unsigned short *)(vc->vc_origin + offset);
243 else if (!vc->vc_sw->con_screen_pos)
244 p = (unsigned short *)(vc->vc_visible_origin + offset);
245 else
246 p = vc->vc_sw->con_screen_pos(vc, offset);
247 return p;
248 }
249
250 static inline void scrolldelta(int lines)
251 {
252 scrollback_delta += lines;
253 schedule_console_callback();
254 }
255
256 void schedule_console_callback(void)
257 {
258 schedule_work(&console_work);
259 }
260
261 static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
262 {
263 unsigned short *d, *s;
264
265 if (t+nr >= b)
266 nr = b - t - 1;
267 if (b > vc->vc_rows || t >= b || nr < 1)
268 return;
269 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr))
270 return;
271 d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
272 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr));
273 scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row);
274 scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_video_erase_char,
275 vc->vc_size_row * nr);
276 }
277
278 static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
279 {
280 unsigned short *s;
281 unsigned int step;
282
283 if (t+nr >= b)
284 nr = b - t - 1;
285 if (b > vc->vc_rows || t >= b || nr < 1)
286 return;
287 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr))
288 return;
289 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
290 step = vc->vc_cols * nr;
291 scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row);
292 scr_memsetw(s, vc->vc_video_erase_char, 2 * step);
293 }
294
295 static void do_update_region(struct vc_data *vc, unsigned long start, int count)
296 {
297 #ifndef VT_BUF_VRAM_ONLY
298 unsigned int xx, yy, offset;
299 u16 *p;
300
301 p = (u16 *) start;
302 if (!vc->vc_sw->con_getxy) {
303 offset = (start - vc->vc_origin) / 2;
304 xx = offset % vc->vc_cols;
305 yy = offset / vc->vc_cols;
306 } else {
307 int nxx, nyy;
308 start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy);
309 xx = nxx; yy = nyy;
310 }
311 for(;;) {
312 u16 attrib = scr_readw(p) & 0xff00;
313 int startx = xx;
314 u16 *q = p;
315 while (xx < vc->vc_cols && count) {
316 if (attrib != (scr_readw(p) & 0xff00)) {
317 if (p > q)
318 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
319 startx = xx;
320 q = p;
321 attrib = scr_readw(p) & 0xff00;
322 }
323 p++;
324 xx++;
325 count--;
326 }
327 if (p > q)
328 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
329 if (!count)
330 break;
331 xx = 0;
332 yy++;
333 if (vc->vc_sw->con_getxy) {
334 p = (u16 *)start;
335 start = vc->vc_sw->con_getxy(vc, start, NULL, NULL);
336 }
337 }
338 #endif
339 }
340
341 void update_region(struct vc_data *vc, unsigned long start, int count)
342 {
343 WARN_CONSOLE_UNLOCKED();
344
345 if (DO_UPDATE(vc)) {
346 hide_cursor(vc);
347 do_update_region(vc, start, count);
348 set_cursor(vc);
349 }
350 }
351
352 /* Structure of attributes is hardware-dependent */
353
354 static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink, u8 _underline, u8 _reverse)
355 {
356 if (vc->vc_sw->con_build_attr)
357 return vc->vc_sw->con_build_attr(vc, _color, _intensity, _blink, _underline, _reverse);
358
359 #ifndef VT_BUF_VRAM_ONLY
360 /*
361 * ++roman: I completely changed the attribute format for monochrome
362 * mode (!can_do_color). The formerly used MDA (monochrome display
363 * adapter) format didn't allow the combination of certain effects.
364 * Now the attribute is just a bit vector:
365 * Bit 0..1: intensity (0..2)
366 * Bit 2 : underline
367 * Bit 3 : reverse
368 * Bit 7 : blink
369 */
370 {
371 u8 a = vc->vc_color;
372 if (!vc->vc_can_do_color)
373 return _intensity |
374 (_underline ? 4 : 0) |
375 (_reverse ? 8 : 0) |
376 (_blink ? 0x80 : 0);
377 if (_underline)
378 a = (a & 0xf0) | vc->vc_ulcolor;
379 else if (_intensity == 0)
380 a = (a & 0xf0) | vc->vc_ulcolor;
381 if (_reverse)
382 a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77);
383 if (_blink)
384 a ^= 0x80;
385 if (_intensity == 2)
386 a ^= 0x08;
387 if (vc->vc_hi_font_mask == 0x100)
388 a <<= 1;
389 return a;
390 }
391 #else
392 return 0;
393 #endif
394 }
395
396 static void update_attr(struct vc_data *vc)
397 {
398 vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity, vc->vc_blink, vc->vc_underline, vc->vc_reverse ^ vc->vc_decscnm);
399 vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm) << 8) | ' ';
400 }
401
402 /* Note: inverting the screen twice should revert to the original state */
403 void invert_screen(struct vc_data *vc, int offset, int count, int viewed)
404 {
405 unsigned short *p;
406
407 WARN_CONSOLE_UNLOCKED();
408
409 count /= 2;
410 p = screenpos(vc, offset, viewed);
411 if (vc->vc_sw->con_invert_region)
412 vc->vc_sw->con_invert_region(vc, p, count);
413 #ifndef VT_BUF_VRAM_ONLY
414 else {
415 u16 *q = p;
416 int cnt = count;
417 u16 a;
418
419 if (!vc->vc_can_do_color) {
420 while (cnt--) {
421 a = scr_readw(q);
422 a ^= 0x0800;
423 scr_writew(a, q);
424 q++;
425 }
426 } else if (vc->vc_hi_font_mask == 0x100) {
427 while (cnt--) {
428 a = scr_readw(q);
429 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4);
430 scr_writew(a, q);
431 q++;
432 }
433 } else {
434 while (cnt--) {
435 a = scr_readw(q);
436 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4);
437 scr_writew(a, q);
438 q++;
439 }
440 }
441 }
442 #endif
443 if (DO_UPDATE(vc))
444 do_update_region(vc, (unsigned long) p, count);
445 }
446
447 /* used by selection: complement pointer position */
448 void complement_pos(struct vc_data *vc, int offset)
449 {
450 static int old_offset = -1;
451 static unsigned short old;
452 static unsigned short oldx, oldy;
453
454 WARN_CONSOLE_UNLOCKED();
455
456 if (old_offset != -1 && old_offset >= 0 &&
457 old_offset < vc->vc_screenbuf_size) {
458 scr_writew(old, screenpos(vc, old_offset, 1));
459 if (DO_UPDATE(vc))
460 vc->vc_sw->con_putc(vc, old, oldy, oldx);
461 }
462
463 old_offset = offset;
464
465 if (offset != -1 && offset >= 0 &&
466 offset < vc->vc_screenbuf_size) {
467 unsigned short new;
468 unsigned short *p;
469 p = screenpos(vc, offset, 1);
470 old = scr_readw(p);
471 new = old ^ vc->vc_complement_mask;
472 scr_writew(new, p);
473 if (DO_UPDATE(vc)) {
474 oldx = (offset >> 1) % vc->vc_cols;
475 oldy = (offset >> 1) / vc->vc_cols;
476 vc->vc_sw->con_putc(vc, new, oldy, oldx);
477 }
478 }
479
480 }
481
482 static void insert_char(struct vc_data *vc, unsigned int nr)
483 {
484 unsigned short *p, *q = (unsigned short *)vc->vc_pos;
485
486 p = q + vc->vc_cols - nr - vc->vc_x;
487 while (--p >= q)
488 scr_writew(scr_readw(p), p + nr);
489 scr_memsetw(q, vc->vc_video_erase_char, nr * 2);
490 vc->vc_need_wrap = 0;
491 if (DO_UPDATE(vc)) {
492 unsigned short oldattr = vc->vc_attr;
493 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x, vc->vc_y, vc->vc_x + nr, 1,
494 vc->vc_cols - vc->vc_x - nr);
495 vc->vc_attr = vc->vc_video_erase_char >> 8;
496 while (nr--)
497 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y, vc->vc_x + nr);
498 vc->vc_attr = oldattr;
499 }
500 }
501
502 static void delete_char(struct vc_data *vc, unsigned int nr)
503 {
504 unsigned int i = vc->vc_x;
505 unsigned short *p = (unsigned short *)vc->vc_pos;
506
507 while (++i <= vc->vc_cols - nr) {
508 scr_writew(scr_readw(p+nr), p);
509 p++;
510 }
511 scr_memsetw(p, vc->vc_video_erase_char, nr * 2);
512 vc->vc_need_wrap = 0;
513 if (DO_UPDATE(vc)) {
514 unsigned short oldattr = vc->vc_attr;
515 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x + nr, vc->vc_y, vc->vc_x, 1,
516 vc->vc_cols - vc->vc_x - nr);
517 vc->vc_attr = vc->vc_video_erase_char >> 8;
518 while (nr--)
519 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y,
520 vc->vc_cols - 1 - nr);
521 vc->vc_attr = oldattr;
522 }
523 }
524
525 static int softcursor_original;
526
527 static void add_softcursor(struct vc_data *vc)
528 {
529 int i = scr_readw((u16 *) vc->vc_pos);
530 u32 type = vc->vc_cursor_type;
531
532 if (! (type & 0x10)) return;
533 if (softcursor_original != -1) return;
534 softcursor_original = i;
535 i |= ((type >> 8) & 0xff00 );
536 i ^= ((type) & 0xff00 );
537 if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000;
538 if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700;
539 scr_writew(i, (u16 *) vc->vc_pos);
540 if (DO_UPDATE(vc))
541 vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x);
542 }
543
544 static void hide_softcursor(struct vc_data *vc)
545 {
546 if (softcursor_original != -1) {
547 scr_writew(softcursor_original, (u16 *)vc->vc_pos);
548 if (DO_UPDATE(vc))
549 vc->vc_sw->con_putc(vc, softcursor_original,
550 vc->vc_y, vc->vc_x);
551 softcursor_original = -1;
552 }
553 }
554
555 static void hide_cursor(struct vc_data *vc)
556 {
557 if (vc == sel_cons)
558 clear_selection();
559 vc->vc_sw->con_cursor(vc, CM_ERASE);
560 hide_softcursor(vc);
561 }
562
563 static void set_cursor(struct vc_data *vc)
564 {
565 if (!IS_FG(vc) || console_blanked ||
566 vc->vc_mode == KD_GRAPHICS)
567 return;
568 if (vc->vc_deccm) {
569 if (vc == sel_cons)
570 clear_selection();
571 add_softcursor(vc);
572 if ((vc->vc_cursor_type & 0x0f) != 1)
573 vc->vc_sw->con_cursor(vc, CM_DRAW);
574 } else
575 hide_cursor(vc);
576 }
577
578 static void set_origin(struct vc_data *vc)
579 {
580 WARN_CONSOLE_UNLOCKED();
581
582 if (!CON_IS_VISIBLE(vc) ||
583 !vc->vc_sw->con_set_origin ||
584 !vc->vc_sw->con_set_origin(vc))
585 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
586 vc->vc_visible_origin = vc->vc_origin;
587 vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size;
588 vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x;
589 }
590
591 static inline void save_screen(struct vc_data *vc)
592 {
593 WARN_CONSOLE_UNLOCKED();
594
595 if (vc->vc_sw->con_save_screen)
596 vc->vc_sw->con_save_screen(vc);
597 }
598
599 /*
600 * Redrawing of screen
601 */
602
603 static void clear_buffer_attributes(struct vc_data *vc)
604 {
605 unsigned short *p = (unsigned short *)vc->vc_origin;
606 int count = vc->vc_screenbuf_size / 2;
607 int mask = vc->vc_hi_font_mask | 0xff;
608
609 for (; count > 0; count--, p++) {
610 scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p);
611 }
612 }
613
614 void redraw_screen(struct vc_data *vc, int is_switch)
615 {
616 int redraw = 0;
617
618 WARN_CONSOLE_UNLOCKED();
619
620 if (!vc) {
621 /* strange ... */
622 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
623 return;
624 }
625
626 if (is_switch) {
627 struct vc_data *old_vc = vc_cons[fg_console].d;
628 if (old_vc == vc)
629 return;
630 if (!CON_IS_VISIBLE(vc))
631 redraw = 1;
632 *vc->vc_display_fg = vc;
633 fg_console = vc->vc_num;
634 hide_cursor(old_vc);
635 if (!CON_IS_VISIBLE(old_vc)) {
636 save_screen(old_vc);
637 set_origin(old_vc);
638 }
639 } else {
640 hide_cursor(vc);
641 redraw = 1;
642 }
643
644 if (redraw) {
645 int update;
646 int old_was_color = vc->vc_can_do_color;
647
648 set_origin(vc);
649 update = vc->vc_sw->con_switch(vc);
650 set_palette(vc);
651 /*
652 * If console changed from mono<->color, the best we can do
653 * is to clear the buffer attributes. As it currently stands,
654 * rebuilding new attributes from the old buffer is not doable
655 * without overly complex code.
656 */
657 if (old_was_color != vc->vc_can_do_color) {
658 update_attr(vc);
659 clear_buffer_attributes(vc);
660 }
661 if (update && vc->vc_mode != KD_GRAPHICS)
662 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
663 }
664 set_cursor(vc);
665 if (is_switch) {
666 set_leds();
667 compute_shiftstate();
668 }
669 }
670
671 /*
672 * Allocation, freeing and resizing of VTs.
673 */
674
675 int vc_cons_allocated(unsigned int i)
676 {
677 return (i < MAX_NR_CONSOLES && vc_cons[i].d);
678 }
679
680 static void visual_init(struct vc_data *vc, int num, int init)
681 {
682 /* ++Geert: vc->vc_sw->con_init determines console size */
683 if (vc->vc_sw)
684 module_put(vc->vc_sw->owner);
685 vc->vc_sw = conswitchp;
686 #ifndef VT_SINGLE_DRIVER
687 if (con_driver_map[num])
688 vc->vc_sw = con_driver_map[num];
689 #endif
690 __module_get(vc->vc_sw->owner);
691 vc->vc_num = num;
692 vc->vc_display_fg = &master_display_fg;
693 vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir;
694 vc->vc_uni_pagedir = 0;
695 vc->vc_hi_font_mask = 0;
696 vc->vc_complement_mask = 0;
697 vc->vc_can_do_color = 0;
698 vc->vc_sw->con_init(vc, init);
699 if (!vc->vc_complement_mask)
700 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
701 vc->vc_s_complement_mask = vc->vc_complement_mask;
702 vc->vc_size_row = vc->vc_cols << 1;
703 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
704 }
705
706 int vc_allocate(unsigned int currcons) /* return 0 on success */
707 {
708 WARN_CONSOLE_UNLOCKED();
709
710 if (currcons >= MAX_NR_CONSOLES)
711 return -ENXIO;
712 if (!vc_cons[currcons].d) {
713 struct vc_data *vc;
714
715 /* prevent users from taking too much memory */
716 if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE))
717 return -EPERM;
718
719 /* due to the granularity of kmalloc, we waste some memory here */
720 /* the alloc is done in two steps, to optimize the common situation
721 of a 25x80 console (structsize=216, screenbuf_size=4000) */
722 /* although the numbers above are not valid since long ago, the
723 point is still up-to-date and the comment still has its value
724 even if only as a historical artifact. --mj, July 1998 */
725 vc = kmalloc(sizeof(struct vc_data), GFP_KERNEL);
726 if (!vc)
727 return -ENOMEM;
728 memset(vc, 0, sizeof(*vc));
729 vc_cons[currcons].d = vc;
730 visual_init(vc, currcons, 1);
731 if (!*vc->vc_uni_pagedir_loc)
732 con_set_default_unimap(vc);
733 vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL);
734 if (!vc->vc_screenbuf) {
735 kfree(vc);
736 vc_cons[currcons].d = NULL;
737 return -ENOMEM;
738 }
739 vc->vc_kmalloced = 1;
740 vc_init(vc, vc->vc_rows, vc->vc_cols, 1);
741 }
742 return 0;
743 }
744
745 static inline int resize_screen(struct vc_data *vc, int width, int height)
746 {
747 /* Resizes the resolution of the display adapater */
748 int err = 0;
749
750 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize)
751 err = vc->vc_sw->con_resize(vc, width, height);
752 return err;
753 }
754
755 /*
756 * Change # of rows and columns (0 means unchanged/the size of fg_console)
757 * [this is to be used together with some user program
758 * like resize that changes the hardware videomode]
759 */
760 #define VC_RESIZE_MAXCOL (32767)
761 #define VC_RESIZE_MAXROW (32767)
762 int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int lines)
763 {
764 unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0;
765 unsigned int old_cols, old_rows, old_row_size, old_screen_size;
766 unsigned int new_cols, new_rows, new_row_size, new_screen_size;
767 unsigned int end;
768 unsigned short *newscreen;
769
770 WARN_CONSOLE_UNLOCKED();
771
772 if (!vc)
773 return -ENXIO;
774
775 if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW)
776 return -EINVAL;
777
778 new_cols = (cols ? cols : vc->vc_cols);
779 new_rows = (lines ? lines : vc->vc_rows);
780 new_row_size = new_cols << 1;
781 new_screen_size = new_row_size * new_rows;
782
783 if (new_cols == vc->vc_cols && new_rows == vc->vc_rows)
784 return 0;
785
786 newscreen = (unsigned short *) kmalloc(new_screen_size, GFP_USER);
787 if (!newscreen)
788 return -ENOMEM;
789
790 old_rows = vc->vc_rows;
791 old_cols = vc->vc_cols;
792 old_row_size = vc->vc_size_row;
793 old_screen_size = vc->vc_screenbuf_size;
794
795 err = resize_screen(vc, new_cols, new_rows);
796 if (err) {
797 kfree(newscreen);
798 return err;
799 }
800
801 vc->vc_rows = new_rows;
802 vc->vc_cols = new_cols;
803 vc->vc_size_row = new_row_size;
804 vc->vc_screenbuf_size = new_screen_size;
805
806 rlth = min(old_row_size, new_row_size);
807 rrem = new_row_size - rlth;
808 old_origin = vc->vc_origin;
809 new_origin = (long) newscreen;
810 new_scr_end = new_origin + new_screen_size;
811
812 if (vc->vc_y > new_rows) {
813 if (old_rows - vc->vc_y < new_rows) {
814 /*
815 * Cursor near the bottom, copy contents from the
816 * bottom of buffer
817 */
818 old_origin += (old_rows - new_rows) * old_row_size;
819 end = vc->vc_scr_end;
820 } else {
821 /*
822 * Cursor is in no man's land, copy 1/2 screenful
823 * from the top and bottom of cursor position
824 */
825 old_origin += (vc->vc_y - new_rows/2) * old_row_size;
826 end = old_origin + (old_row_size * new_rows);
827 }
828 } else
829 /*
830 * Cursor near the top, copy contents from the top of buffer
831 */
832 end = (old_rows > new_rows) ? old_origin +
833 (old_row_size * new_rows) :
834 vc->vc_scr_end;
835
836 update_attr(vc);
837
838 while (old_origin < end) {
839 scr_memcpyw((unsigned short *) new_origin,
840 (unsigned short *) old_origin, rlth);
841 if (rrem)
842 scr_memsetw((void *)(new_origin + rlth),
843 vc->vc_video_erase_char, rrem);
844 old_origin += old_row_size;
845 new_origin += new_row_size;
846 }
847 if (new_scr_end > new_origin)
848 scr_memsetw((void *)new_origin, vc->vc_video_erase_char,
849 new_scr_end - new_origin);
850 if (vc->vc_kmalloced)
851 kfree(vc->vc_screenbuf);
852 vc->vc_screenbuf = newscreen;
853 vc->vc_kmalloced = 1;
854 vc->vc_screenbuf_size = new_screen_size;
855 set_origin(vc);
856
857 /* do part of a reset_terminal() */
858 vc->vc_top = 0;
859 vc->vc_bottom = vc->vc_rows;
860 gotoxy(vc, vc->vc_x, vc->vc_y);
861 save_cur(vc);
862
863 if (vc->vc_tty) {
864 struct winsize ws, *cws = &vc->vc_tty->winsize;
865
866 memset(&ws, 0, sizeof(ws));
867 ws.ws_row = vc->vc_rows;
868 ws.ws_col = vc->vc_cols;
869 ws.ws_ypixel = vc->vc_scan_lines;
870 if ((ws.ws_row != cws->ws_row || ws.ws_col != cws->ws_col) &&
871 vc->vc_tty->pgrp > 0)
872 kill_pg(vc->vc_tty->pgrp, SIGWINCH, 1);
873 *cws = ws;
874 }
875
876 if (CON_IS_VISIBLE(vc))
877 update_screen(vc);
878 return err;
879 }
880
881
882 void vc_disallocate(unsigned int currcons)
883 {
884 WARN_CONSOLE_UNLOCKED();
885
886 if (vc_cons_allocated(currcons)) {
887 struct vc_data *vc = vc_cons[currcons].d;
888 vc->vc_sw->con_deinit(vc);
889 module_put(vc->vc_sw->owner);
890 if (vc->vc_kmalloced)
891 kfree(vc->vc_screenbuf);
892 if (currcons >= MIN_NR_CONSOLES)
893 kfree(vc);
894 vc_cons[currcons].d = NULL;
895 }
896 }
897
898 /*
899 * VT102 emulator
900 */
901
902 #define set_kbd(vc, x) set_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
903 #define clr_kbd(vc, x) clr_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
904 #define is_kbd(vc, x) vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
905
906 #define decarm VC_REPEAT
907 #define decckm VC_CKMODE
908 #define kbdapplic VC_APPLIC
909 #define lnm VC_CRLF
910
911 /*
912 * this is what the terminal answers to a ESC-Z or csi0c query.
913 */
914 #define VT100ID "\033[?1;2c"
915 #define VT102ID "\033[?6c"
916
917 unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7,
918 8,12,10,14, 9,13,11,15 };
919
920 /* the default colour table, for VGA+ colour systems */
921 int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
922 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
923 int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
924 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
925 int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
926 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
927
928 /*
929 * gotoxy() must verify all boundaries, because the arguments
930 * might also be negative. If the given position is out of
931 * bounds, the cursor is placed at the nearest margin.
932 */
933 static void gotoxy(struct vc_data *vc, int new_x, int new_y)
934 {
935 int min_y, max_y;
936
937 if (new_x < 0)
938 vc->vc_x = 0;
939 else {
940 if (new_x >= vc->vc_cols)
941 vc->vc_x = vc->vc_cols - 1;
942 else
943 vc->vc_x = new_x;
944 }
945
946 if (vc->vc_decom) {
947 min_y = vc->vc_top;
948 max_y = vc->vc_bottom;
949 } else {
950 min_y = 0;
951 max_y = vc->vc_rows;
952 }
953 if (new_y < min_y)
954 vc->vc_y = min_y;
955 else if (new_y >= max_y)
956 vc->vc_y = max_y - 1;
957 else
958 vc->vc_y = new_y;
959 vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1);
960 vc->vc_need_wrap = 0;
961 }
962
963 /* for absolute user moves, when decom is set */
964 static void gotoxay(struct vc_data *vc, int new_x, int new_y)
965 {
966 gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y);
967 }
968
969 void scrollback(struct vc_data *vc, int lines)
970 {
971 if (!lines)
972 lines = vc->vc_rows / 2;
973 scrolldelta(-lines);
974 }
975
976 void scrollfront(struct vc_data *vc, int lines)
977 {
978 if (!lines)
979 lines = vc->vc_rows / 2;
980 scrolldelta(lines);
981 }
982
983 static void lf(struct vc_data *vc)
984 {
985 /* don't scroll if above bottom of scrolling region, or
986 * if below scrolling region
987 */
988 if (vc->vc_y + 1 == vc->vc_bottom)
989 scrup(vc, vc->vc_top, vc->vc_bottom, 1);
990 else if (vc->vc_y < vc->vc_rows - 1) {
991 vc->vc_y++;
992 vc->vc_pos += vc->vc_size_row;
993 }
994 vc->vc_need_wrap = 0;
995 }
996
997 static void ri(struct vc_data *vc)
998 {
999 /* don't scroll if below top of scrolling region, or
1000 * if above scrolling region
1001 */
1002 if (vc->vc_y == vc->vc_top)
1003 scrdown(vc, vc->vc_top, vc->vc_bottom, 1);
1004 else if (vc->vc_y > 0) {
1005 vc->vc_y--;
1006 vc->vc_pos -= vc->vc_size_row;
1007 }
1008 vc->vc_need_wrap = 0;
1009 }
1010
1011 static inline void cr(struct vc_data *vc)
1012 {
1013 vc->vc_pos -= vc->vc_x << 1;
1014 vc->vc_need_wrap = vc->vc_x = 0;
1015 }
1016
1017 static inline void bs(struct vc_data *vc)
1018 {
1019 if (vc->vc_x) {
1020 vc->vc_pos -= 2;
1021 vc->vc_x--;
1022 vc->vc_need_wrap = 0;
1023 }
1024 }
1025
1026 static inline void del(struct vc_data *vc)
1027 {
1028 /* ignored */
1029 }
1030
1031 static void csi_J(struct vc_data *vc, int vpar)
1032 {
1033 unsigned int count;
1034 unsigned short * start;
1035
1036 switch (vpar) {
1037 case 0: /* erase from cursor to end of display */
1038 count = (vc->vc_scr_end - vc->vc_pos) >> 1;
1039 start = (unsigned short *)vc->vc_pos;
1040 if (DO_UPDATE(vc)) {
1041 /* do in two stages */
1042 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1043 vc->vc_cols - vc->vc_x);
1044 vc->vc_sw->con_clear(vc, vc->vc_y + 1, 0,
1045 vc->vc_rows - vc->vc_y - 1,
1046 vc->vc_cols);
1047 }
1048 break;
1049 case 1: /* erase from start to cursor */
1050 count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1;
1051 start = (unsigned short *)vc->vc_origin;
1052 if (DO_UPDATE(vc)) {
1053 /* do in two stages */
1054 vc->vc_sw->con_clear(vc, 0, 0, vc->vc_y,
1055 vc->vc_cols);
1056 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1057 vc->vc_x + 1);
1058 }
1059 break;
1060 case 2: /* erase whole display */
1061 count = vc->vc_cols * vc->vc_rows;
1062 start = (unsigned short *)vc->vc_origin;
1063 if (DO_UPDATE(vc))
1064 vc->vc_sw->con_clear(vc, 0, 0,
1065 vc->vc_rows,
1066 vc->vc_cols);
1067 break;
1068 default:
1069 return;
1070 }
1071 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1072 vc->vc_need_wrap = 0;
1073 }
1074
1075 static void csi_K(struct vc_data *vc, int vpar)
1076 {
1077 unsigned int count;
1078 unsigned short * start;
1079
1080 switch (vpar) {
1081 case 0: /* erase from cursor to end of line */
1082 count = vc->vc_cols - vc->vc_x;
1083 start = (unsigned short *)vc->vc_pos;
1084 if (DO_UPDATE(vc))
1085 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1086 vc->vc_cols - vc->vc_x);
1087 break;
1088 case 1: /* erase from start of line to cursor */
1089 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1090 count = vc->vc_x + 1;
1091 if (DO_UPDATE(vc))
1092 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1093 vc->vc_x + 1);
1094 break;
1095 case 2: /* erase whole line */
1096 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1097 count = vc->vc_cols;
1098 if (DO_UPDATE(vc))
1099 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1100 vc->vc_cols);
1101 break;
1102 default:
1103 return;
1104 }
1105 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1106 vc->vc_need_wrap = 0;
1107 }
1108
1109 static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */
1110 { /* not vt100? */
1111 int count;
1112
1113 if (!vpar)
1114 vpar++;
1115 count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar;
1116
1117 scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count);
1118 if (DO_UPDATE(vc))
1119 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count);
1120 vc->vc_need_wrap = 0;
1121 }
1122
1123 static void default_attr(struct vc_data *vc)
1124 {
1125 vc->vc_intensity = 1;
1126 vc->vc_underline = 0;
1127 vc->vc_reverse = 0;
1128 vc->vc_blink = 0;
1129 vc->vc_color = vc->vc_def_color;
1130 }
1131
1132 /* console_sem is held */
1133 static void csi_m(struct vc_data *vc)
1134 {
1135 int i;
1136
1137 for (i = 0; i <= vc->vc_npar; i++)
1138 switch (vc->vc_par[i]) {
1139 case 0: /* all attributes off */
1140 default_attr(vc);
1141 break;
1142 case 1:
1143 vc->vc_intensity = 2;
1144 break;
1145 case 2:
1146 vc->vc_intensity = 0;
1147 break;
1148 case 4:
1149 vc->vc_underline = 1;
1150 break;
1151 case 5:
1152 vc->vc_blink = 1;
1153 break;
1154 case 7:
1155 vc->vc_reverse = 1;
1156 break;
1157 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1158 * Select primary font, don't display
1159 * control chars if defined, don't set
1160 * bit 8 on output.
1161 */
1162 vc->vc_translate = set_translate(vc->vc_charset == 0
1163 ? vc->vc_G0_charset
1164 : vc->vc_G1_charset, vc);
1165 vc->vc_disp_ctrl = 0;
1166 vc->vc_toggle_meta = 0;
1167 break;
1168 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1169 * Select first alternate font, lets
1170 * chars < 32 be displayed as ROM chars.
1171 */
1172 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1173 vc->vc_disp_ctrl = 1;
1174 vc->vc_toggle_meta = 0;
1175 break;
1176 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1177 * Select second alternate font, toggle
1178 * high bit before displaying as ROM char.
1179 */
1180 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1181 vc->vc_disp_ctrl = 1;
1182 vc->vc_toggle_meta = 1;
1183 break;
1184 case 21:
1185 case 22:
1186 vc->vc_intensity = 1;
1187 break;
1188 case 24:
1189 vc->vc_underline = 0;
1190 break;
1191 case 25:
1192 vc->vc_blink = 0;
1193 break;
1194 case 27:
1195 vc->vc_reverse = 0;
1196 break;
1197 case 38: /* ANSI X3.64-1979 (SCO-ish?)
1198 * Enables underscore, white foreground
1199 * with white underscore (Linux - use
1200 * default foreground).
1201 */
1202 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1203 vc->vc_underline = 1;
1204 break;
1205 case 39: /* ANSI X3.64-1979 (SCO-ish?)
1206 * Disable underline option.
1207 * Reset colour to default? It did this
1208 * before...
1209 */
1210 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1211 vc->vc_underline = 0;
1212 break;
1213 case 49:
1214 vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f);
1215 break;
1216 default:
1217 if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37)
1218 vc->vc_color = color_table[vc->vc_par[i] - 30]
1219 | (vc->vc_color & 0xf0);
1220 else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47)
1221 vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4)
1222 | (vc->vc_color & 0x0f);
1223 break;
1224 }
1225 update_attr(vc);
1226 }
1227
1228 static void respond_string(const char *p, struct tty_struct *tty)
1229 {
1230 while (*p) {
1231 tty_insert_flip_char(tty, *p, 0);
1232 p++;
1233 }
1234 con_schedule_flip(tty);
1235 }
1236
1237 static void cursor_report(struct vc_data *vc, struct tty_struct *tty)
1238 {
1239 char buf[40];
1240
1241 sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1);
1242 respond_string(buf, tty);
1243 }
1244
1245 static inline void status_report(struct tty_struct *tty)
1246 {
1247 respond_string("\033[0n", tty); /* Terminal ok */
1248 }
1249
1250 static inline void respond_ID(struct tty_struct * tty)
1251 {
1252 respond_string(VT102ID, tty);
1253 }
1254
1255 void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry)
1256 {
1257 char buf[8];
1258
1259 sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx),
1260 (char)('!' + mry));
1261 respond_string(buf, tty);
1262 }
1263
1264 /* invoked via ioctl(TIOCLINUX) and through set_selection */
1265 int mouse_reporting(void)
1266 {
1267 return vc_cons[fg_console].d->vc_report_mouse;
1268 }
1269
1270 /* console_sem is held */
1271 static void set_mode(struct vc_data *vc, int on_off)
1272 {
1273 int i;
1274
1275 for (i = 0; i <= vc->vc_npar; i++)
1276 if (vc->vc_ques) {
1277 switch(vc->vc_par[i]) { /* DEC private modes set/reset */
1278 case 1: /* Cursor keys send ^[Ox/^[[x */
1279 if (on_off)
1280 set_kbd(vc, decckm);
1281 else
1282 clr_kbd(vc, decckm);
1283 break;
1284 case 3: /* 80/132 mode switch unimplemented */
1285 vc->vc_deccolm = on_off;
1286 #if 0
1287 vc_resize(deccolm ? 132 : 80, vc->vc_rows);
1288 /* this alone does not suffice; some user mode
1289 utility has to change the hardware regs */
1290 #endif
1291 break;
1292 case 5: /* Inverted screen on/off */
1293 if (vc->vc_decscnm != on_off) {
1294 vc->vc_decscnm = on_off;
1295 invert_screen(vc, 0, vc->vc_screenbuf_size, 0);
1296 update_attr(vc);
1297 }
1298 break;
1299 case 6: /* Origin relative/absolute */
1300 vc->vc_decom = on_off;
1301 gotoxay(vc, 0, 0);
1302 break;
1303 case 7: /* Autowrap on/off */
1304 vc->vc_decawm = on_off;
1305 break;
1306 case 8: /* Autorepeat on/off */
1307 if (on_off)
1308 set_kbd(vc, decarm);
1309 else
1310 clr_kbd(vc, decarm);
1311 break;
1312 case 9:
1313 vc->vc_report_mouse = on_off ? 1 : 0;
1314 break;
1315 case 25: /* Cursor on/off */
1316 vc->vc_deccm = on_off;
1317 break;
1318 case 1000:
1319 vc->vc_report_mouse = on_off ? 2 : 0;
1320 break;
1321 }
1322 } else {
1323 switch(vc->vc_par[i]) { /* ANSI modes set/reset */
1324 case 3: /* Monitor (display ctrls) */
1325 vc->vc_disp_ctrl = on_off;
1326 break;
1327 case 4: /* Insert Mode on/off */
1328 vc->vc_decim = on_off;
1329 break;
1330 case 20: /* Lf, Enter == CrLf/Lf */
1331 if (on_off)
1332 set_kbd(vc, lnm);
1333 else
1334 clr_kbd(vc, lnm);
1335 break;
1336 }
1337 }
1338 }
1339
1340 /* console_sem is held */
1341 static void setterm_command(struct vc_data *vc)
1342 {
1343 switch(vc->vc_par[0]) {
1344 case 1: /* set color for underline mode */
1345 if (vc->vc_can_do_color &&
1346 vc->vc_par[1] < 16) {
1347 vc->vc_ulcolor = color_table[vc->vc_par[1]];
1348 if (vc->vc_underline)
1349 update_attr(vc);
1350 }
1351 break;
1352 case 2: /* set color for half intensity mode */
1353 if (vc->vc_can_do_color &&
1354 vc->vc_par[1] < 16) {
1355 vc->vc_halfcolor = color_table[vc->vc_par[1]];
1356 if (vc->vc_intensity == 0)
1357 update_attr(vc);
1358 }
1359 break;
1360 case 8: /* store colors as defaults */
1361 vc->vc_def_color = vc->vc_attr;
1362 if (vc->vc_hi_font_mask == 0x100)
1363 vc->vc_def_color >>= 1;
1364 default_attr(vc);
1365 update_attr(vc);
1366 break;
1367 case 9: /* set blanking interval */
1368 blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1369 poke_blanked_console();
1370 break;
1371 case 10: /* set bell frequency in Hz */
1372 if (vc->vc_npar >= 1)
1373 vc->vc_bell_pitch = vc->vc_par[1];
1374 else
1375 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1376 break;
1377 case 11: /* set bell duration in msec */
1378 if (vc->vc_npar >= 1)
1379 vc->vc_bell_duration = (vc->vc_par[1] < 2000) ?
1380 vc->vc_par[1] * HZ / 1000 : 0;
1381 else
1382 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1383 break;
1384 case 12: /* bring specified console to the front */
1385 if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1))
1386 set_console(vc->vc_par[1] - 1);
1387 break;
1388 case 13: /* unblank the screen */
1389 poke_blanked_console();
1390 break;
1391 case 14: /* set vesa powerdown interval */
1392 vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1393 break;
1394 case 15: /* activate the previous console */
1395 set_console(last_console);
1396 break;
1397 }
1398 }
1399
1400 /* console_sem is held */
1401 static void csi_at(struct vc_data *vc, unsigned int nr)
1402 {
1403 if (nr > vc->vc_cols - vc->vc_x)
1404 nr = vc->vc_cols - vc->vc_x;
1405 else if (!nr)
1406 nr = 1;
1407 insert_char(vc, nr);
1408 }
1409
1410 /* console_sem is held */
1411 static void csi_L(struct vc_data *vc, unsigned int nr)
1412 {
1413 if (nr > vc->vc_rows - vc->vc_y)
1414 nr = vc->vc_rows - vc->vc_y;
1415 else if (!nr)
1416 nr = 1;
1417 scrdown(vc, vc->vc_y, vc->vc_bottom, nr);
1418 vc->vc_need_wrap = 0;
1419 }
1420
1421 /* console_sem is held */
1422 static void csi_P(struct vc_data *vc, unsigned int nr)
1423 {
1424 if (nr > vc->vc_cols - vc->vc_x)
1425 nr = vc->vc_cols - vc->vc_x;
1426 else if (!nr)
1427 nr = 1;
1428 delete_char(vc, nr);
1429 }
1430
1431 /* console_sem is held */
1432 static void csi_M(struct vc_data *vc, unsigned int nr)
1433 {
1434 if (nr > vc->vc_rows - vc->vc_y)
1435 nr = vc->vc_rows - vc->vc_y;
1436 else if (!nr)
1437 nr=1;
1438 scrup(vc, vc->vc_y, vc->vc_bottom, nr);
1439 vc->vc_need_wrap = 0;
1440 }
1441
1442 /* console_sem is held (except via vc_init->reset_terminal */
1443 static void save_cur(struct vc_data *vc)
1444 {
1445 vc->vc_saved_x = vc->vc_x;
1446 vc->vc_saved_y = vc->vc_y;
1447 vc->vc_s_intensity = vc->vc_intensity;
1448 vc->vc_s_underline = vc->vc_underline;
1449 vc->vc_s_blink = vc->vc_blink;
1450 vc->vc_s_reverse = vc->vc_reverse;
1451 vc->vc_s_charset = vc->vc_charset;
1452 vc->vc_s_color = vc->vc_color;
1453 vc->vc_saved_G0 = vc->vc_G0_charset;
1454 vc->vc_saved_G1 = vc->vc_G1_charset;
1455 }
1456
1457 /* console_sem is held */
1458 static void restore_cur(struct vc_data *vc)
1459 {
1460 gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y);
1461 vc->vc_intensity = vc->vc_s_intensity;
1462 vc->vc_underline = vc->vc_s_underline;
1463 vc->vc_blink = vc->vc_s_blink;
1464 vc->vc_reverse = vc->vc_s_reverse;
1465 vc->vc_charset = vc->vc_s_charset;
1466 vc->vc_color = vc->vc_s_color;
1467 vc->vc_G0_charset = vc->vc_saved_G0;
1468 vc->vc_G1_charset = vc->vc_saved_G1;
1469 vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc);
1470 update_attr(vc);
1471 vc->vc_need_wrap = 0;
1472 }
1473
1474 enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey,
1475 EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd,
1476 ESpalette };
1477
1478 /* console_sem is held (except via vc_init()) */
1479 static void reset_terminal(struct vc_data *vc, int do_clear)
1480 {
1481 vc->vc_top = 0;
1482 vc->vc_bottom = vc->vc_rows;
1483 vc->vc_state = ESnormal;
1484 vc->vc_ques = 0;
1485 vc->vc_translate = set_translate(LAT1_MAP, vc);
1486 vc->vc_G0_charset = LAT1_MAP;
1487 vc->vc_G1_charset = GRAF_MAP;
1488 vc->vc_charset = 0;
1489 vc->vc_need_wrap = 0;
1490 vc->vc_report_mouse = 0;
1491 vc->vc_utf = 0;
1492 vc->vc_utf_count = 0;
1493
1494 vc->vc_disp_ctrl = 0;
1495 vc->vc_toggle_meta = 0;
1496
1497 vc->vc_decscnm = 0;
1498 vc->vc_decom = 0;
1499 vc->vc_decawm = 1;
1500 vc->vc_deccm = 1;
1501 vc->vc_decim = 0;
1502
1503 set_kbd(vc, decarm);
1504 clr_kbd(vc, decckm);
1505 clr_kbd(vc, kbdapplic);
1506 clr_kbd(vc, lnm);
1507 kbd_table[vc->vc_num].lockstate = 0;
1508 kbd_table[vc->vc_num].slockstate = 0;
1509 kbd_table[vc->vc_num].ledmode = LED_SHOW_FLAGS;
1510 kbd_table[vc->vc_num].ledflagstate = kbd_table[vc->vc_num].default_ledflagstate;
1511 /* do not do set_leds here because this causes an endless tasklet loop
1512 when the keyboard hasn't been initialized yet */
1513
1514 vc->vc_cursor_type = CUR_DEFAULT;
1515 vc->vc_complement_mask = vc->vc_s_complement_mask;
1516
1517 default_attr(vc);
1518 update_attr(vc);
1519
1520 vc->vc_tab_stop[0] = 0x01010100;
1521 vc->vc_tab_stop[1] =
1522 vc->vc_tab_stop[2] =
1523 vc->vc_tab_stop[3] =
1524 vc->vc_tab_stop[4] = 0x01010101;
1525
1526 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1527 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1528
1529 gotoxy(vc, 0, 0);
1530 save_cur(vc);
1531 if (do_clear)
1532 csi_J(vc, 2);
1533 }
1534
1535 /* console_sem is held */
1536 static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
1537 {
1538 /*
1539 * Control characters can be used in the _middle_
1540 * of an escape sequence.
1541 */
1542 switch (c) {
1543 case 0:
1544 return;
1545 case 7:
1546 if (vc->vc_bell_duration)
1547 kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration);
1548 return;
1549 case 8:
1550 bs(vc);
1551 return;
1552 case 9:
1553 vc->vc_pos -= (vc->vc_x << 1);
1554 while (vc->vc_x < vc->vc_cols - 1) {
1555 vc->vc_x++;
1556 if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31)))
1557 break;
1558 }
1559 vc->vc_pos += (vc->vc_x << 1);
1560 return;
1561 case 10: case 11: case 12:
1562 lf(vc);
1563 if (!is_kbd(vc, lnm))
1564 return;
1565 case 13:
1566 cr(vc);
1567 return;
1568 case 14:
1569 vc->vc_charset = 1;
1570 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1571 vc->vc_disp_ctrl = 1;
1572 return;
1573 case 15:
1574 vc->vc_charset = 0;
1575 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1576 vc->vc_disp_ctrl = 0;
1577 return;
1578 case 24: case 26:
1579 vc->vc_state = ESnormal;
1580 return;
1581 case 27:
1582 vc->vc_state = ESesc;
1583 return;
1584 case 127:
1585 del(vc);
1586 return;
1587 case 128+27:
1588 vc->vc_state = ESsquare;
1589 return;
1590 }
1591 switch(vc->vc_state) {
1592 case ESesc:
1593 vc->vc_state = ESnormal;
1594 switch (c) {
1595 case '[':
1596 vc->vc_state = ESsquare;
1597 return;
1598 case ']':
1599 vc->vc_state = ESnonstd;
1600 return;
1601 case '%':
1602 vc->vc_state = ESpercent;
1603 return;
1604 case 'E':
1605 cr(vc);
1606 lf(vc);
1607 return;
1608 case 'M':
1609 ri(vc);
1610 return;
1611 case 'D':
1612 lf(vc);
1613 return;
1614 case 'H':
1615 vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31));
1616 return;
1617 case 'Z':
1618 respond_ID(tty);
1619 return;
1620 case '7':
1621 save_cur(vc);
1622 return;
1623 case '8':
1624 restore_cur(vc);
1625 return;
1626 case '(':
1627 vc->vc_state = ESsetG0;
1628 return;
1629 case ')':
1630 vc->vc_state = ESsetG1;
1631 return;
1632 case '#':
1633 vc->vc_state = EShash;
1634 return;
1635 case 'c':
1636 reset_terminal(vc, 1);
1637 return;
1638 case '>': /* Numeric keypad */
1639 clr_kbd(vc, kbdapplic);
1640 return;
1641 case '=': /* Appl. keypad */
1642 set_kbd(vc, kbdapplic);
1643 return;
1644 }
1645 return;
1646 case ESnonstd:
1647 if (c=='P') { /* palette escape sequence */
1648 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1649 vc->vc_par[vc->vc_npar] = 0;
1650 vc->vc_npar = 0;
1651 vc->vc_state = ESpalette;
1652 return;
1653 } else if (c=='R') { /* reset palette */
1654 reset_palette(vc);
1655 vc->vc_state = ESnormal;
1656 } else
1657 vc->vc_state = ESnormal;
1658 return;
1659 case ESpalette:
1660 if ( (c>='0'&&c<='9') || (c>='A'&&c<='F') || (c>='a'&&c<='f') ) {
1661 vc->vc_par[vc->vc_npar++] = (c > '9' ? (c & 0xDF) - 'A' + 10 : c - '0');
1662 if (vc->vc_npar == 7) {
1663 int i = vc->vc_par[0] * 3, j = 1;
1664 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1665 vc->vc_palette[i++] += vc->vc_par[j++];
1666 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1667 vc->vc_palette[i++] += vc->vc_par[j++];
1668 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1669 vc->vc_palette[i] += vc->vc_par[j];
1670 set_palette(vc);
1671 vc->vc_state = ESnormal;
1672 }
1673 } else
1674 vc->vc_state = ESnormal;
1675 return;
1676 case ESsquare:
1677 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1678 vc->vc_par[vc->vc_npar] = 0;
1679 vc->vc_npar = 0;
1680 vc->vc_state = ESgetpars;
1681 if (c == '[') { /* Function key */
1682 vc->vc_state=ESfunckey;
1683 return;
1684 }
1685 vc->vc_ques = (c == '?');
1686 if (vc->vc_ques)
1687 return;
1688 case ESgetpars:
1689 if (c == ';' && vc->vc_npar < NPAR - 1) {
1690 vc->vc_npar++;
1691 return;
1692 } else if (c>='0' && c<='9') {
1693 vc->vc_par[vc->vc_npar] *= 10;
1694 vc->vc_par[vc->vc_npar] += c - '0';
1695 return;
1696 } else
1697 vc->vc_state = ESgotpars;
1698 case ESgotpars:
1699 vc->vc_state = ESnormal;
1700 switch(c) {
1701 case 'h':
1702 set_mode(vc, 1);
1703 return;
1704 case 'l':
1705 set_mode(vc, 0);
1706 return;
1707 case 'c':
1708 if (vc->vc_ques) {
1709 if (vc->vc_par[0])
1710 vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16);
1711 else
1712 vc->vc_cursor_type = CUR_DEFAULT;
1713 return;
1714 }
1715 break;
1716 case 'm':
1717 if (vc->vc_ques) {
1718 clear_selection();
1719 if (vc->vc_par[0])
1720 vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1];
1721 else
1722 vc->vc_complement_mask = vc->vc_s_complement_mask;
1723 return;
1724 }
1725 break;
1726 case 'n':
1727 if (!vc->vc_ques) {
1728 if (vc->vc_par[0] == 5)
1729 status_report(tty);
1730 else if (vc->vc_par[0] == 6)
1731 cursor_report(vc, tty);
1732 }
1733 return;
1734 }
1735 if (vc->vc_ques) {
1736 vc->vc_ques = 0;
1737 return;
1738 }
1739 switch(c) {
1740 case 'G': case '`':
1741 if (vc->vc_par[0])
1742 vc->vc_par[0]--;
1743 gotoxy(vc, vc->vc_par[0], vc->vc_y);
1744 return;
1745 case 'A':
1746 if (!vc->vc_par[0])
1747 vc->vc_par[0]++;
1748 gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]);
1749 return;
1750 case 'B': case 'e':
1751 if (!vc->vc_par[0])
1752 vc->vc_par[0]++;
1753 gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]);
1754 return;
1755 case 'C': case 'a':
1756 if (!vc->vc_par[0])
1757 vc->vc_par[0]++;
1758 gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y);
1759 return;
1760 case 'D':
1761 if (!vc->vc_par[0])
1762 vc->vc_par[0]++;
1763 gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y);
1764 return;
1765 case 'E':
1766 if (!vc->vc_par[0])
1767 vc->vc_par[0]++;
1768 gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]);
1769 return;
1770 case 'F':
1771 if (!vc->vc_par[0])
1772 vc->vc_par[0]++;
1773 gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]);
1774 return;
1775 case 'd':
1776 if (vc->vc_par[0])
1777 vc->vc_par[0]--;
1778 gotoxay(vc, vc->vc_x ,vc->vc_par[0]);
1779 return;
1780 case 'H': case 'f':
1781 if (vc->vc_par[0])
1782 vc->vc_par[0]--;
1783 if (vc->vc_par[1])
1784 vc->vc_par[1]--;
1785 gotoxay(vc, vc->vc_par[1], vc->vc_par[0]);
1786 return;
1787 case 'J':
1788 csi_J(vc, vc->vc_par[0]);
1789 return;
1790 case 'K':
1791 csi_K(vc, vc->vc_par[0]);
1792 return;
1793 case 'L':
1794 csi_L(vc, vc->vc_par[0]);
1795 return;
1796 case 'M':
1797 csi_M(vc, vc->vc_par[0]);
1798 return;
1799 case 'P':
1800 csi_P(vc, vc->vc_par[0]);
1801 return;
1802 case 'c':
1803 if (!vc->vc_par[0])
1804 respond_ID(tty);
1805 return;
1806 case 'g':
1807 if (!vc->vc_par[0])
1808 vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31));
1809 else if (vc->vc_par[0] == 3) {
1810 vc->vc_tab_stop[0] =
1811 vc->vc_tab_stop[1] =
1812 vc->vc_tab_stop[2] =
1813 vc->vc_tab_stop[3] =
1814 vc->vc_tab_stop[4] = 0;
1815 }
1816 return;
1817 case 'm':
1818 csi_m(vc);
1819 return;
1820 case 'q': /* DECLL - but only 3 leds */
1821 /* map 0,1,2,3 to 0,1,2,4 */
1822 if (vc->vc_par[0] < 4)
1823 setledstate(kbd_table + vc->vc_num,
1824 (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4);
1825 return;
1826 case 'r':
1827 if (!vc->vc_par[0])
1828 vc->vc_par[0]++;
1829 if (!vc->vc_par[1])
1830 vc->vc_par[1] = vc->vc_rows;
1831 /* Minimum allowed region is 2 lines */
1832 if (vc->vc_par[0] < vc->vc_par[1] &&
1833 vc->vc_par[1] <= vc->vc_rows) {
1834 vc->vc_top = vc->vc_par[0] - 1;
1835 vc->vc_bottom = vc->vc_par[1];
1836 gotoxay(vc, 0, 0);
1837 }
1838 return;
1839 case 's':
1840 save_cur(vc);
1841 return;
1842 case 'u':
1843 restore_cur(vc);
1844 return;
1845 case 'X':
1846 csi_X(vc, vc->vc_par[0]);
1847 return;
1848 case '@':
1849 csi_at(vc, vc->vc_par[0]);
1850 return;
1851 case ']': /* setterm functions */
1852 setterm_command(vc);
1853 return;
1854 }
1855 return;
1856 case ESpercent:
1857 vc->vc_state = ESnormal;
1858 switch (c) {
1859 case '@': /* defined in ISO 2022 */
1860 vc->vc_utf = 0;
1861 return;
1862 case 'G': /* prelim official escape code */
1863 case '8': /* retained for compatibility */
1864 vc->vc_utf = 1;
1865 return;
1866 }
1867 return;
1868 case ESfunckey:
1869 vc->vc_state = ESnormal;
1870 return;
1871 case EShash:
1872 vc->vc_state = ESnormal;
1873 if (c == '8') {
1874 /* DEC screen alignment test. kludge :-) */
1875 vc->vc_video_erase_char =
1876 (vc->vc_video_erase_char & 0xff00) | 'E';
1877 csi_J(vc, 2);
1878 vc->vc_video_erase_char =
1879 (vc->vc_video_erase_char & 0xff00) | ' ';
1880 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
1881 }
1882 return;
1883 case ESsetG0:
1884 if (c == '0')
1885 vc->vc_G0_charset = GRAF_MAP;
1886 else if (c == 'B')
1887 vc->vc_G0_charset = LAT1_MAP;
1888 else if (c == 'U')
1889 vc->vc_G0_charset = IBMPC_MAP;
1890 else if (c == 'K')
1891 vc->vc_G0_charset = USER_MAP;
1892 if (vc->vc_charset == 0)
1893 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1894 vc->vc_state = ESnormal;
1895 return;
1896 case ESsetG1:
1897 if (c == '0')
1898 vc->vc_G1_charset = GRAF_MAP;
1899 else if (c == 'B')
1900 vc->vc_G1_charset = LAT1_MAP;
1901 else if (c == 'U')
1902 vc->vc_G1_charset = IBMPC_MAP;
1903 else if (c == 'K')
1904 vc->vc_G1_charset = USER_MAP;
1905 if (vc->vc_charset == 1)
1906 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1907 vc->vc_state = ESnormal;
1908 return;
1909 default:
1910 vc->vc_state = ESnormal;
1911 }
1912 }
1913
1914 /* This is a temporary buffer used to prepare a tty console write
1915 * so that we can easily avoid touching user space while holding the
1916 * console spinlock. It is allocated in con_init and is shared by
1917 * this code and the vc_screen read/write tty calls.
1918 *
1919 * We have to allocate this statically in the kernel data section
1920 * since console_init (and thus con_init) are called before any
1921 * kernel memory allocation is available.
1922 */
1923 char con_buf[CON_BUF_SIZE];
1924 DECLARE_MUTEX(con_buf_sem);
1925
1926 /* acquires console_sem */
1927 static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count)
1928 {
1929 #ifdef VT_BUF_VRAM_ONLY
1930 #define FLUSH do { } while(0);
1931 #else
1932 #define FLUSH if (draw_x >= 0) { \
1933 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
1934 draw_x = -1; \
1935 }
1936 #endif
1937
1938 int c, tc, ok, n = 0, draw_x = -1;
1939 unsigned int currcons;
1940 unsigned long draw_from = 0, draw_to = 0;
1941 struct vc_data *vc;
1942 u16 himask, charmask;
1943 const unsigned char *orig_buf = NULL;
1944 int orig_count;
1945
1946 if (in_interrupt())
1947 return count;
1948
1949 might_sleep();
1950
1951 acquire_console_sem();
1952 vc = tty->driver_data;
1953 if (vc == NULL) {
1954 printk(KERN_ERR "vt: argh, driver_data is NULL !\n");
1955 release_console_sem();
1956 return 0;
1957 }
1958
1959 currcons = vc->vc_num;
1960 if (!vc_cons_allocated(currcons)) {
1961 /* could this happen? */
1962 static int error = 0;
1963 if (!error) {
1964 error = 1;
1965 printk("con_write: tty %d not allocated\n", currcons+1);
1966 }
1967 release_console_sem();
1968 return 0;
1969 }
1970 release_console_sem();
1971
1972 orig_buf = buf;
1973 orig_count = count;
1974
1975 /* At this point 'buf' is guaranteed to be a kernel buffer
1976 * and therefore no access to userspace (and therefore sleeping)
1977 * will be needed. The con_buf_sem serializes all tty based
1978 * console rendering and vcs write/read operations. We hold
1979 * the console spinlock during the entire write.
1980 */
1981
1982 acquire_console_sem();
1983
1984 vc = tty->driver_data;
1985 if (vc == NULL) {
1986 printk(KERN_ERR "vt: argh, driver_data _became_ NULL !\n");
1987 release_console_sem();
1988 goto out;
1989 }
1990
1991 himask = vc->vc_hi_font_mask;
1992 charmask = himask ? 0x1ff : 0xff;
1993
1994 /* undraw cursor first */
1995 if (IS_FG(vc))
1996 hide_cursor(vc);
1997
1998 while (!tty->stopped && count) {
1999 int orig = *buf;
2000 c = orig;
2001 buf++;
2002 n++;
2003 count--;
2004
2005 /* Do no translation at all in control states */
2006 if (vc->vc_state != ESnormal) {
2007 tc = c;
2008 } else if (vc->vc_utf) {
2009 /* Combine UTF-8 into Unicode */
2010 /* Incomplete characters silently ignored */
2011 if(c > 0x7f) {
2012 if (vc->vc_utf_count > 0 && (c & 0xc0) == 0x80) {
2013 vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f);
2014 vc->vc_utf_count--;
2015 if (vc->vc_utf_count == 0)
2016 tc = c = vc->vc_utf_char;
2017 else continue;
2018 } else {
2019 if ((c & 0xe0) == 0xc0) {
2020 vc->vc_utf_count = 1;
2021 vc->vc_utf_char = (c & 0x1f);
2022 } else if ((c & 0xf0) == 0xe0) {
2023 vc->vc_utf_count = 2;
2024 vc->vc_utf_char = (c & 0x0f);
2025 } else if ((c & 0xf8) == 0xf0) {
2026 vc->vc_utf_count = 3;
2027 vc->vc_utf_char = (c & 0x07);
2028 } else if ((c & 0xfc) == 0xf8) {
2029 vc->vc_utf_count = 4;
2030 vc->vc_utf_char = (c & 0x03);
2031 } else if ((c & 0xfe) == 0xfc) {
2032 vc->vc_utf_count = 5;
2033 vc->vc_utf_char = (c & 0x01);
2034 } else
2035 vc->vc_utf_count = 0;
2036 continue;
2037 }
2038 } else {
2039 tc = c;
2040 vc->vc_utf_count = 0;
2041 }
2042 } else { /* no utf */
2043 tc = vc->vc_translate[vc->vc_toggle_meta ? (c | 0x80) : c];
2044 }
2045
2046 /* If the original code was a control character we
2047 * only allow a glyph to be displayed if the code is
2048 * not normally used (such as for cursor movement) or
2049 * if the disp_ctrl mode has been explicitly enabled.
2050 * Certain characters (as given by the CTRL_ALWAYS
2051 * bitmap) are always displayed as control characters,
2052 * as the console would be pretty useless without
2053 * them; to display an arbitrary font position use the
2054 * direct-to-font zone in UTF-8 mode.
2055 */
2056 ok = tc && (c >= 32 ||
2057 (!vc->vc_utf && !(((vc->vc_disp_ctrl ? CTRL_ALWAYS
2058 : CTRL_ACTION) >> c) & 1)))
2059 && (c != 127 || vc->vc_disp_ctrl)
2060 && (c != 128+27);
2061
2062 if (vc->vc_state == ESnormal && ok) {
2063 /* Now try to find out how to display it */
2064 tc = conv_uni_to_pc(vc, tc);
2065 if ( tc == -4 ) {
2066 /* If we got -4 (not found) then see if we have
2067 defined a replacement character (U+FFFD) */
2068 tc = conv_uni_to_pc(vc, 0xfffd);
2069
2070 /* One reason for the -4 can be that we just
2071 did a clear_unimap();
2072 try at least to show something. */
2073 if (tc == -4)
2074 tc = c;
2075 } else if ( tc == -3 ) {
2076 /* Bad hash table -- hope for the best */
2077 tc = c;
2078 }
2079 if (tc & ~charmask)
2080 continue; /* Conversion failed */
2081
2082 if (vc->vc_need_wrap || vc->vc_decim)
2083 FLUSH
2084 if (vc->vc_need_wrap) {
2085 cr(vc);
2086 lf(vc);
2087 }
2088 if (vc->vc_decim)
2089 insert_char(vc, 1);
2090 scr_writew(himask ?
2091 ((vc->vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) :
2092 (vc->vc_attr << 8) + tc,
2093 (u16 *) vc->vc_pos);
2094 if (DO_UPDATE(vc) && draw_x < 0) {
2095 draw_x = vc->vc_x;
2096 draw_from = vc->vc_pos;
2097 }
2098 if (vc->vc_x == vc->vc_cols - 1) {
2099 vc->vc_need_wrap = vc->vc_decawm;
2100 draw_to = vc->vc_pos + 2;
2101 } else {
2102 vc->vc_x++;
2103 draw_to = (vc->vc_pos += 2);
2104 }
2105 continue;
2106 }
2107 FLUSH
2108 do_con_trol(tty, vc, orig);
2109 }
2110 FLUSH
2111 console_conditional_schedule();
2112 release_console_sem();
2113
2114 out:
2115 return n;
2116 #undef FLUSH
2117 }
2118
2119 /*
2120 * This is the console switching callback.
2121 *
2122 * Doing console switching in a process context allows
2123 * us to do the switches asynchronously (needed when we want
2124 * to switch due to a keyboard interrupt). Synchronization
2125 * with other console code and prevention of re-entrancy is
2126 * ensured with console_sem.
2127 */
2128 static void console_callback(void *ignored)
2129 {
2130 acquire_console_sem();
2131
2132 if (want_console >= 0) {
2133 if (want_console != fg_console &&
2134 vc_cons_allocated(want_console)) {
2135 hide_cursor(vc_cons[fg_console].d);
2136 change_console(vc_cons[want_console].d);
2137 /* we only changed when the console had already
2138 been allocated - a new console is not created
2139 in an interrupt routine */
2140 }
2141 want_console = -1;
2142 }
2143 if (do_poke_blanked_console) { /* do not unblank for a LED change */
2144 do_poke_blanked_console = 0;
2145 poke_blanked_console();
2146 }
2147 if (scrollback_delta) {
2148 struct vc_data *vc = vc_cons[fg_console].d;
2149 clear_selection();
2150 if (vc->vc_mode == KD_TEXT)
2151 vc->vc_sw->con_scrolldelta(vc, scrollback_delta);
2152 scrollback_delta = 0;
2153 }
2154 if (blank_timer_expired) {
2155 do_blank_screen(0);
2156 blank_timer_expired = 0;
2157 }
2158
2159 release_console_sem();
2160 }
2161
2162 void set_console(int nr)
2163 {
2164 want_console = nr;
2165 schedule_console_callback();
2166 }
2167
2168 struct tty_driver *console_driver;
2169
2170 #ifdef CONFIG_VT_CONSOLE
2171
2172 /*
2173 * Console on virtual terminal
2174 *
2175 * The console must be locked when we get here.
2176 */
2177
2178 static void vt_console_print(struct console *co, const char *b, unsigned count)
2179 {
2180 struct vc_data *vc = vc_cons[fg_console].d;
2181 unsigned char c;
2182 static unsigned long printing;
2183 const ushort *start;
2184 ushort cnt = 0;
2185 ushort myx;
2186
2187 /* console busy or not yet initialized */
2188 if (!printable || test_and_set_bit(0, &printing))
2189 return;
2190
2191 if (kmsg_redirect && vc_cons_allocated(kmsg_redirect - 1))
2192 vc = vc_cons[kmsg_redirect - 1].d;
2193
2194 /* read `x' only after setting currcons properly (otherwise
2195 the `x' macro will read the x of the foreground console). */
2196 myx = vc->vc_x;
2197
2198 if (!vc_cons_allocated(fg_console)) {
2199 /* impossible */
2200 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2201 goto quit;
2202 }
2203
2204 if (vc->vc_mode != KD_TEXT)
2205 goto quit;
2206
2207 /* undraw cursor first */
2208 if (IS_FG(vc))
2209 hide_cursor(vc);
2210
2211 start = (ushort *)vc->vc_pos;
2212
2213 /* Contrived structure to try to emulate original need_wrap behaviour
2214 * Problems caused when we have need_wrap set on '\n' character */
2215 while (count--) {
2216 c = *b++;
2217 if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) {
2218 if (cnt > 0) {
2219 if (CON_IS_VISIBLE(vc))
2220 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2221 vc->vc_x += cnt;
2222 if (vc->vc_need_wrap)
2223 vc->vc_x--;
2224 cnt = 0;
2225 }
2226 if (c == 8) { /* backspace */
2227 bs(vc);
2228 start = (ushort *)vc->vc_pos;
2229 myx = vc->vc_x;
2230 continue;
2231 }
2232 if (c != 13)
2233 lf(vc);
2234 cr(vc);
2235 start = (ushort *)vc->vc_pos;
2236 myx = vc->vc_x;
2237 if (c == 10 || c == 13)
2238 continue;
2239 }
2240 scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos);
2241 cnt++;
2242 if (myx == vc->vc_cols - 1) {
2243 vc->vc_need_wrap = 1;
2244 continue;
2245 }
2246 vc->vc_pos += 2;
2247 myx++;
2248 }
2249 if (cnt > 0) {
2250 if (CON_IS_VISIBLE(vc))
2251 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2252 vc->vc_x += cnt;
2253 if (vc->vc_x == vc->vc_cols) {
2254 vc->vc_x--;
2255 vc->vc_need_wrap = 1;
2256 }
2257 }
2258 set_cursor(vc);
2259
2260 quit:
2261 clear_bit(0, &printing);
2262 }
2263
2264 static struct tty_driver *vt_console_device(struct console *c, int *index)
2265 {
2266 *index = c->index ? c->index-1 : fg_console;
2267 return console_driver;
2268 }
2269
2270 static struct console vt_console_driver = {
2271 .name = "tty",
2272 .write = vt_console_print,
2273 .device = vt_console_device,
2274 .unblank = unblank_screen,
2275 .flags = CON_PRINTBUFFER,
2276 .index = -1,
2277 };
2278 #endif
2279
2280 /*
2281 * Handling of Linux-specific VC ioctls
2282 */
2283
2284 /*
2285 * Generally a bit racy with respect to console_sem().
2286 *
2287 * There are some functions which don't need it.
2288 *
2289 * There are some functions which can sleep for arbitrary periods
2290 * (paste_selection) but we don't need the lock there anyway.
2291 *
2292 * set_selection has locking, and definitely needs it
2293 */
2294
2295 int tioclinux(struct tty_struct *tty, unsigned long arg)
2296 {
2297 char type, data;
2298 char __user *p = (char __user *)arg;
2299 int lines;
2300 int ret;
2301
2302 if (tty->driver->type != TTY_DRIVER_TYPE_CONSOLE)
2303 return -EINVAL;
2304 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN))
2305 return -EPERM;
2306 if (get_user(type, p))
2307 return -EFAULT;
2308 ret = 0;
2309 switch (type)
2310 {
2311 case TIOCL_SETSEL:
2312 acquire_console_sem();
2313 ret = set_selection((struct tiocl_selection __user *)(p+1), tty);
2314 release_console_sem();
2315 break;
2316 case TIOCL_PASTESEL:
2317 ret = paste_selection(tty);
2318 break;
2319 case TIOCL_UNBLANKSCREEN:
2320 acquire_console_sem();
2321 unblank_screen();
2322 release_console_sem();
2323 break;
2324 case TIOCL_SELLOADLUT:
2325 ret = sel_loadlut(p);
2326 break;
2327 case TIOCL_GETSHIFTSTATE:
2328
2329 /*
2330 * Make it possible to react to Shift+Mousebutton.
2331 * Note that 'shift_state' is an undocumented
2332 * kernel-internal variable; programs not closely
2333 * related to the kernel should not use this.
2334 */
2335 data = shift_state;
2336 ret = __put_user(data, p);
2337 break;
2338 case TIOCL_GETMOUSEREPORTING:
2339 data = mouse_reporting();
2340 ret = __put_user(data, p);
2341 break;
2342 case TIOCL_SETVESABLANK:
2343 set_vesa_blanking(p);
2344 break;
2345 case TIOCL_GETKMSGREDIRECT:
2346 data = kmsg_redirect;
2347 ret = __put_user(data, p);
2348 break;
2349 case TIOCL_SETKMSGREDIRECT:
2350 if (!capable(CAP_SYS_ADMIN)) {
2351 ret = -EPERM;
2352 } else {
2353 if (get_user(data, p+1))
2354 ret = -EFAULT;
2355 else
2356 kmsg_redirect = data;
2357 }
2358 break;
2359 case TIOCL_GETFGCONSOLE:
2360 ret = fg_console;
2361 break;
2362 case TIOCL_SCROLLCONSOLE:
2363 if (get_user(lines, (s32 __user *)(p+4))) {
2364 ret = -EFAULT;
2365 } else {
2366 scrollfront(vc_cons[fg_console].d, lines);
2367 ret = 0;
2368 }
2369 break;
2370 case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
2371 acquire_console_sem();
2372 ignore_poke = 1;
2373 do_blank_screen(0);
2374 release_console_sem();
2375 break;
2376 case TIOCL_BLANKEDSCREEN:
2377 ret = console_blanked;
2378 break;
2379 default:
2380 ret = -EINVAL;
2381 break;
2382 }
2383 return ret;
2384 }
2385
2386 /*
2387 * /dev/ttyN handling
2388 */
2389
2390 static int con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2391 {
2392 int retval;
2393
2394 retval = do_con_write(tty, buf, count);
2395 con_flush_chars(tty);
2396
2397 return retval;
2398 }
2399
2400 static void con_put_char(struct tty_struct *tty, unsigned char ch)
2401 {
2402 if (in_interrupt())
2403 return; /* n_r3964 calls put_char() from interrupt context */
2404 do_con_write(tty, &ch, 1);
2405 }
2406
2407 static int con_write_room(struct tty_struct *tty)
2408 {
2409 if (tty->stopped)
2410 return 0;
2411 return 4096; /* No limit, really; we're not buffering */
2412 }
2413
2414 static int con_chars_in_buffer(struct tty_struct *tty)
2415 {
2416 return 0; /* we're not buffering */
2417 }
2418
2419 /*
2420 * con_throttle and con_unthrottle are only used for
2421 * paste_selection(), which has to stuff in a large number of
2422 * characters...
2423 */
2424 static void con_throttle(struct tty_struct *tty)
2425 {
2426 }
2427
2428 static void con_unthrottle(struct tty_struct *tty)
2429 {
2430 struct vc_data *vc = tty->driver_data;
2431
2432 wake_up_interruptible(&vc->paste_wait);
2433 }
2434
2435 /*
2436 * Turn the Scroll-Lock LED on when the tty is stopped
2437 */
2438 static void con_stop(struct tty_struct *tty)
2439 {
2440 int console_num;
2441 if (!tty)
2442 return;
2443 console_num = tty->index;
2444 if (!vc_cons_allocated(console_num))
2445 return;
2446 set_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2447 set_leds();
2448 }
2449
2450 /*
2451 * Turn the Scroll-Lock LED off when the console is started
2452 */
2453 static void con_start(struct tty_struct *tty)
2454 {
2455 int console_num;
2456 if (!tty)
2457 return;
2458 console_num = tty->index;
2459 if (!vc_cons_allocated(console_num))
2460 return;
2461 clr_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2462 set_leds();
2463 }
2464
2465 static void con_flush_chars(struct tty_struct *tty)
2466 {
2467 struct vc_data *vc;
2468
2469 if (in_interrupt()) /* from flush_to_ldisc */
2470 return;
2471
2472 /* if we race with con_close(), vt may be null */
2473 acquire_console_sem();
2474 vc = tty->driver_data;
2475 if (vc)
2476 set_cursor(vc);
2477 release_console_sem();
2478 }
2479
2480 /*
2481 * Allocate the console screen memory.
2482 */
2483 static int con_open(struct tty_struct *tty, struct file *filp)
2484 {
2485 unsigned int currcons = tty->index;
2486 int ret = 0;
2487
2488 acquire_console_sem();
2489 if (tty->driver_data == NULL) {
2490 ret = vc_allocate(currcons);
2491 if (ret == 0) {
2492 struct vc_data *vc = vc_cons[currcons].d;
2493 tty->driver_data = vc;
2494 vc->vc_tty = tty;
2495
2496 if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
2497 tty->winsize.ws_row = vc_cons[currcons].d->vc_rows;
2498 tty->winsize.ws_col = vc_cons[currcons].d->vc_cols;
2499 }
2500 release_console_sem();
2501 vcs_make_devfs(tty);
2502 return ret;
2503 }
2504 }
2505 release_console_sem();
2506 return ret;
2507 }
2508
2509 /*
2510 * We take tty_mutex in here to prevent another thread from coming in via init_dev
2511 * and taking a ref against the tty while we're in the process of forgetting
2512 * about it and cleaning things up.
2513 *
2514 * This is because vcs_remove_devfs() can sleep and will drop the BKL.
2515 */
2516 static void con_close(struct tty_struct *tty, struct file *filp)
2517 {
2518 mutex_lock(&tty_mutex);
2519 acquire_console_sem();
2520 if (tty && tty->count == 1) {
2521 struct vc_data *vc = tty->driver_data;
2522
2523 if (vc)
2524 vc->vc_tty = NULL;
2525 tty->driver_data = NULL;
2526 release_console_sem();
2527 vcs_remove_devfs(tty);
2528 mutex_unlock(&tty_mutex);
2529 /*
2530 * tty_mutex is released, but we still hold BKL, so there is
2531 * still exclusion against init_dev()
2532 */
2533 return;
2534 }
2535 release_console_sem();
2536 mutex_unlock(&tty_mutex);
2537 }
2538
2539 static void vc_init(struct vc_data *vc, unsigned int rows,
2540 unsigned int cols, int do_clear)
2541 {
2542 int j, k ;
2543
2544 vc->vc_cols = cols;
2545 vc->vc_rows = rows;
2546 vc->vc_size_row = cols << 1;
2547 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
2548
2549 set_origin(vc);
2550 vc->vc_pos = vc->vc_origin;
2551 reset_vc(vc);
2552 for (j=k=0; j<16; j++) {
2553 vc->vc_palette[k++] = default_red[j] ;
2554 vc->vc_palette[k++] = default_grn[j] ;
2555 vc->vc_palette[k++] = default_blu[j] ;
2556 }
2557 vc->vc_def_color = 0x07; /* white */
2558 vc->vc_ulcolor = 0x0f; /* bold white */
2559 vc->vc_halfcolor = 0x08; /* grey */
2560 init_waitqueue_head(&vc->paste_wait);
2561 reset_terminal(vc, do_clear);
2562 }
2563
2564 /*
2565 * This routine initializes console interrupts, and does nothing
2566 * else. If you want the screen to clear, call tty_write with
2567 * the appropriate escape-sequence.
2568 */
2569
2570 static int __init con_init(void)
2571 {
2572 const char *display_desc = NULL;
2573 struct vc_data *vc;
2574 unsigned int currcons = 0, i;
2575
2576 acquire_console_sem();
2577
2578 if (conswitchp)
2579 display_desc = conswitchp->con_startup();
2580 if (!display_desc) {
2581 fg_console = 0;
2582 release_console_sem();
2583 return 0;
2584 }
2585
2586 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2587 struct con_driver *con_driver = &registered_con_driver[i];
2588
2589 if (con_driver->con == NULL) {
2590 con_driver->con = conswitchp;
2591 con_driver->desc = display_desc;
2592 con_driver->flag = CON_DRIVER_FLAG_INIT;
2593 con_driver->first = 0;
2594 con_driver->last = MAX_NR_CONSOLES - 1;
2595 break;
2596 }
2597 }
2598
2599 for (i = 0; i < MAX_NR_CONSOLES; i++)
2600 con_driver_map[i] = conswitchp;
2601
2602 init_timer(&console_timer);
2603 console_timer.function = blank_screen_t;
2604 if (blankinterval) {
2605 blank_state = blank_normal_wait;
2606 mod_timer(&console_timer, jiffies + blankinterval);
2607 }
2608
2609 /*
2610 * kmalloc is not running yet - we use the bootmem allocator.
2611 */
2612 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) {
2613 vc_cons[currcons].d = vc = alloc_bootmem(sizeof(struct vc_data));
2614 visual_init(vc, currcons, 1);
2615 vc->vc_screenbuf = (unsigned short *)alloc_bootmem(vc->vc_screenbuf_size);
2616 vc->vc_kmalloced = 0;
2617 vc_init(vc, vc->vc_rows, vc->vc_cols,
2618 currcons || !vc->vc_sw->con_save_screen);
2619 }
2620 currcons = fg_console = 0;
2621 master_display_fg = vc = vc_cons[currcons].d;
2622 set_origin(vc);
2623 save_screen(vc);
2624 gotoxy(vc, vc->vc_x, vc->vc_y);
2625 csi_J(vc, 0);
2626 update_screen(vc);
2627 printk("Console: %s %s %dx%d",
2628 vc->vc_can_do_color ? "colour" : "mono",
2629 display_desc, vc->vc_cols, vc->vc_rows);
2630 printable = 1;
2631 printk("\n");
2632
2633 release_console_sem();
2634
2635 #ifdef CONFIG_VT_CONSOLE
2636 register_console(&vt_console_driver);
2637 #endif
2638 return 0;
2639 }
2640 console_initcall(con_init);
2641
2642 static struct tty_operations con_ops = {
2643 .open = con_open,
2644 .close = con_close,
2645 .write = con_write,
2646 .write_room = con_write_room,
2647 .put_char = con_put_char,
2648 .flush_chars = con_flush_chars,
2649 .chars_in_buffer = con_chars_in_buffer,
2650 .ioctl = vt_ioctl,
2651 .stop = con_stop,
2652 .start = con_start,
2653 .throttle = con_throttle,
2654 .unthrottle = con_unthrottle,
2655 };
2656
2657 int __init vty_init(void)
2658 {
2659 vcs_init();
2660
2661 console_driver = alloc_tty_driver(MAX_NR_CONSOLES);
2662 if (!console_driver)
2663 panic("Couldn't allocate console driver\n");
2664 console_driver->owner = THIS_MODULE;
2665 console_driver->name = "tty";
2666 console_driver->name_base = 1;
2667 console_driver->major = TTY_MAJOR;
2668 console_driver->minor_start = 1;
2669 console_driver->type = TTY_DRIVER_TYPE_CONSOLE;
2670 console_driver->init_termios = tty_std_termios;
2671 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS;
2672 tty_set_operations(console_driver, &con_ops);
2673 if (tty_register_driver(console_driver))
2674 panic("Couldn't register console driver\n");
2675
2676 kbd_init();
2677 console_map_init();
2678 #ifdef CONFIG_PROM_CONSOLE
2679 prom_con_init();
2680 #endif
2681 #ifdef CONFIG_MDA_CONSOLE
2682 mda_console_init();
2683 #endif
2684 return 0;
2685 }
2686
2687 #ifndef VT_SINGLE_DRIVER
2688 #include <linux/device.h>
2689
2690 static struct class *vtconsole_class;
2691
2692 static int bind_con_driver(const struct consw *csw, int first, int last,
2693 int deflt)
2694 {
2695 struct module *owner = csw->owner;
2696 const char *desc = NULL;
2697 struct con_driver *con_driver;
2698 int i, j = -1, k = -1, retval = -ENODEV;
2699
2700 if (!try_module_get(owner))
2701 return -ENODEV;
2702
2703 acquire_console_sem();
2704
2705 /* check if driver is registered */
2706 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2707 con_driver = &registered_con_driver[i];
2708
2709 if (con_driver->con == csw) {
2710 desc = con_driver->desc;
2711 retval = 0;
2712 break;
2713 }
2714 }
2715
2716 if (retval)
2717 goto err;
2718
2719 if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) {
2720 csw->con_startup();
2721 con_driver->flag |= CON_DRIVER_FLAG_INIT;
2722 }
2723
2724 if (deflt) {
2725 if (conswitchp)
2726 module_put(conswitchp->owner);
2727
2728 __module_get(owner);
2729 conswitchp = csw;
2730 }
2731
2732 first = max(first, con_driver->first);
2733 last = min(last, con_driver->last);
2734
2735 for (i = first; i <= last; i++) {
2736 int old_was_color;
2737 struct vc_data *vc = vc_cons[i].d;
2738
2739 if (con_driver_map[i])
2740 module_put(con_driver_map[i]->owner);
2741 __module_get(owner);
2742 con_driver_map[i] = csw;
2743
2744 if (!vc || !vc->vc_sw)
2745 continue;
2746
2747 j = i;
2748
2749 if (CON_IS_VISIBLE(vc)) {
2750 k = i;
2751 save_screen(vc);
2752 }
2753
2754 old_was_color = vc->vc_can_do_color;
2755 vc->vc_sw->con_deinit(vc);
2756 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
2757 visual_init(vc, i, 0);
2758 set_origin(vc);
2759 update_attr(vc);
2760
2761 /* If the console changed between mono <-> color, then
2762 * the attributes in the screenbuf will be wrong. The
2763 * following resets all attributes to something sane.
2764 */
2765 if (old_was_color != vc->vc_can_do_color)
2766 clear_buffer_attributes(vc);
2767 }
2768
2769 printk("Console: switching ");
2770 if (!deflt)
2771 printk("consoles %d-%d ", first+1, last+1);
2772 if (j >= 0) {
2773 struct vc_data *vc = vc_cons[j].d;
2774
2775 printk("to %s %s %dx%d\n",
2776 vc->vc_can_do_color ? "colour" : "mono",
2777 desc, vc->vc_cols, vc->vc_rows);
2778
2779 if (k >= 0) {
2780 vc = vc_cons[k].d;
2781 update_screen(vc);
2782 }
2783 } else
2784 printk("to %s\n", desc);
2785
2786 retval = 0;
2787 err:
2788 release_console_sem();
2789 module_put(owner);
2790 return retval;
2791 };
2792
2793 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
2794 static int con_is_graphics(const struct consw *csw, int first, int last)
2795 {
2796 int i, retval = 0;
2797
2798 for (i = first; i <= last; i++) {
2799 struct vc_data *vc = vc_cons[i].d;
2800
2801 if (vc && vc->vc_mode == KD_GRAPHICS) {
2802 retval = 1;
2803 break;
2804 }
2805 }
2806
2807 return retval;
2808 }
2809
2810 static int unbind_con_driver(const struct consw *csw, int first, int last,
2811 int deflt)
2812 {
2813 struct module *owner = csw->owner;
2814 const struct consw *defcsw = NULL;
2815 struct con_driver *con_driver = NULL, *con_back = NULL;
2816 int i, retval = -ENODEV;
2817
2818 if (!try_module_get(owner))
2819 return -ENODEV;
2820
2821 acquire_console_sem();
2822
2823 /* check if driver is registered and if it is unbindable */
2824 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2825 con_driver = &registered_con_driver[i];
2826
2827 if (con_driver->con == csw &&
2828 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
2829 retval = 0;
2830 break;
2831 }
2832 }
2833
2834 if (retval) {
2835 release_console_sem();
2836 goto err;
2837 }
2838
2839 retval = -ENODEV;
2840
2841 /* check if backup driver exists */
2842 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2843 con_back = &registered_con_driver[i];
2844
2845 if (con_back->con &&
2846 !(con_back->flag & CON_DRIVER_FLAG_MODULE)) {
2847 defcsw = con_back->con;
2848 retval = 0;
2849 break;
2850 }
2851 }
2852
2853 if (retval) {
2854 release_console_sem();
2855 goto err;
2856 }
2857
2858 if (!con_is_bound(csw)) {
2859 release_console_sem();
2860 goto err;
2861 }
2862
2863 first = max(first, con_driver->first);
2864 last = min(last, con_driver->last);
2865
2866 for (i = first; i <= last; i++) {
2867 if (con_driver_map[i] == csw) {
2868 module_put(csw->owner);
2869 con_driver_map[i] = NULL;
2870 }
2871 }
2872
2873 if (!con_is_bound(defcsw)) {
2874 const struct consw *defconsw = conswitchp;
2875
2876 defcsw->con_startup();
2877 con_back->flag |= CON_DRIVER_FLAG_INIT;
2878 /*
2879 * vgacon may change the default driver to point
2880 * to dummycon, we restore it here...
2881 */
2882 conswitchp = defconsw;
2883 }
2884
2885 if (!con_is_bound(csw))
2886 con_driver->flag &= ~CON_DRIVER_FLAG_INIT;
2887
2888 release_console_sem();
2889 /* ignore return value, binding should not fail */
2890 bind_con_driver(defcsw, first, last, deflt);
2891 err:
2892 module_put(owner);
2893 return retval;
2894
2895 }
2896
2897 static int vt_bind(struct con_driver *con)
2898 {
2899 const struct consw *defcsw = NULL, *csw = NULL;
2900 int i, more = 1, first = -1, last = -1, deflt = 0;
2901
2902 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
2903 con_is_graphics(con->con, con->first, con->last))
2904 goto err;
2905
2906 csw = con->con;
2907
2908 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2909 struct con_driver *con = &registered_con_driver[i];
2910
2911 if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) {
2912 defcsw = con->con;
2913 break;
2914 }
2915 }
2916
2917 if (!defcsw)
2918 goto err;
2919
2920 while (more) {
2921 more = 0;
2922
2923 for (i = con->first; i <= con->last; i++) {
2924 if (con_driver_map[i] == defcsw) {
2925 if (first == -1)
2926 first = i;
2927 last = i;
2928 more = 1;
2929 } else if (first != -1)
2930 break;
2931 }
2932
2933 if (first == 0 && last == MAX_NR_CONSOLES -1)
2934 deflt = 1;
2935
2936 if (first != -1)
2937 bind_con_driver(csw, first, last, deflt);
2938
2939 first = -1;
2940 last = -1;
2941 deflt = 0;
2942 }
2943
2944 err:
2945 return 0;
2946 }
2947
2948 static int vt_unbind(struct con_driver *con)
2949 {
2950 const struct consw *csw = NULL;
2951 int i, more = 1, first = -1, last = -1, deflt = 0;
2952
2953 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
2954 con_is_graphics(con->con, con->first, con->last))
2955 goto err;
2956
2957 csw = con->con;
2958
2959 while (more) {
2960 more = 0;
2961
2962 for (i = con->first; i <= con->last; i++) {
2963 if (con_driver_map[i] == csw) {
2964 if (first == -1)
2965 first = i;
2966 last = i;
2967 more = 1;
2968 } else if (first != -1)
2969 break;
2970 }
2971
2972 if (first == 0 && last == MAX_NR_CONSOLES -1)
2973 deflt = 1;
2974
2975 if (first != -1)
2976 unbind_con_driver(csw, first, last, deflt);
2977
2978 first = -1;
2979 last = -1;
2980 deflt = 0;
2981 }
2982
2983 err:
2984 return 0;
2985 }
2986 #else
2987 static inline int vt_bind(struct con_driver *con)
2988 {
2989 return 0;
2990 }
2991 static inline int vt_unbind(struct con_driver *con)
2992 {
2993 return 0;
2994 }
2995 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
2996
2997 static ssize_t store_bind(struct class_device *class_device,
2998 const char *buf, size_t count)
2999 {
3000 struct con_driver *con = class_get_devdata(class_device);
3001 int bind = simple_strtoul(buf, NULL, 0);
3002
3003 if (bind)
3004 vt_bind(con);
3005 else
3006 vt_unbind(con);
3007
3008 return count;
3009 }
3010
3011 static ssize_t show_bind(struct class_device *class_device, char *buf)
3012 {
3013 struct con_driver *con = class_get_devdata(class_device);
3014 int bind = con_is_bound(con->con);
3015
3016 return snprintf(buf, PAGE_SIZE, "%i\n", bind);
3017 }
3018
3019 static ssize_t show_name(struct class_device *class_device, char *buf)
3020 {
3021 struct con_driver *con = class_get_devdata(class_device);
3022
3023 return snprintf(buf, PAGE_SIZE, "%s %s\n",
3024 (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)",
3025 con->desc);
3026
3027 }
3028
3029 static struct class_device_attribute class_device_attrs[] = {
3030 __ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind),
3031 __ATTR(name, S_IRUGO, show_name, NULL),
3032 };
3033
3034 static int vtconsole_init_class_device(struct con_driver *con)
3035 {
3036 int i;
3037
3038 class_set_devdata(con->class_dev, con);
3039 for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++)
3040 class_device_create_file(con->class_dev,
3041 &class_device_attrs[i]);
3042
3043 return 0;
3044 }
3045
3046 static void vtconsole_deinit_class_device(struct con_driver *con)
3047 {
3048 int i;
3049
3050 for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++)
3051 class_device_remove_file(con->class_dev,
3052 &class_device_attrs[i]);
3053 }
3054
3055 /**
3056 * con_is_bound - checks if driver is bound to the console
3057 * @csw: console driver
3058 *
3059 * RETURNS: zero if unbound, nonzero if bound
3060 *
3061 * Drivers can call this and if zero, they should release
3062 * all resources allocated on con_startup()
3063 */
3064 int con_is_bound(const struct consw *csw)
3065 {
3066 int i, bound = 0;
3067
3068 for (i = 0; i < MAX_NR_CONSOLES; i++) {
3069 if (con_driver_map[i] == csw) {
3070 bound = 1;
3071 break;
3072 }
3073 }
3074
3075 return bound;
3076 }
3077 EXPORT_SYMBOL(con_is_bound);
3078
3079 /**
3080 * register_con_driver - register console driver to console layer
3081 * @csw: console driver
3082 * @first: the first console to take over, minimum value is 0
3083 * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1
3084 *
3085 * DESCRIPTION: This function registers a console driver which can later
3086 * bind to a range of consoles specified by @first and @last. It will
3087 * also initialize the console driver by calling con_startup().
3088 */
3089 int register_con_driver(const struct consw *csw, int first, int last)
3090 {
3091 struct module *owner = csw->owner;
3092 struct con_driver *con_driver;
3093 const char *desc;
3094 int i, retval = 0;
3095
3096 if (!try_module_get(owner))
3097 return -ENODEV;
3098
3099 acquire_console_sem();
3100
3101 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3102 con_driver = &registered_con_driver[i];
3103
3104 /* already registered */
3105 if (con_driver->con == csw)
3106 retval = -EINVAL;
3107 }
3108
3109 if (retval)
3110 goto err;
3111
3112 desc = csw->con_startup();
3113
3114 if (!desc)
3115 goto err;
3116
3117 retval = -EINVAL;
3118
3119 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3120 con_driver = &registered_con_driver[i];
3121
3122 if (con_driver->con == NULL) {
3123 con_driver->con = csw;
3124 con_driver->desc = desc;
3125 con_driver->node = i;
3126 con_driver->flag = CON_DRIVER_FLAG_MODULE |
3127 CON_DRIVER_FLAG_INIT;
3128 con_driver->first = first;
3129 con_driver->last = last;
3130 retval = 0;
3131 break;
3132 }
3133 }
3134
3135 if (retval)
3136 goto err;
3137
3138 con_driver->class_dev = class_device_create(vtconsole_class, NULL,
3139 MKDEV(0, con_driver->node),
3140 NULL, "vtcon%i",
3141 con_driver->node);
3142
3143 if (IS_ERR(con_driver->class_dev)) {
3144 printk(KERN_WARNING "Unable to create class_device for %s; "
3145 "errno = %ld\n", con_driver->desc,
3146 PTR_ERR(con_driver->class_dev));
3147 con_driver->class_dev = NULL;
3148 } else {
3149 vtconsole_init_class_device(con_driver);
3150 }
3151 err:
3152 release_console_sem();
3153 module_put(owner);
3154 return retval;
3155 }
3156 EXPORT_SYMBOL(register_con_driver);
3157
3158 /**
3159 * unregister_con_driver - unregister console driver from console layer
3160 * @csw: console driver
3161 *
3162 * DESCRIPTION: All drivers that registers to the console layer must
3163 * call this function upon exit, or if the console driver is in a state
3164 * where it won't be able to handle console services, such as the
3165 * framebuffer console without loaded framebuffer drivers.
3166 *
3167 * The driver must unbind first prior to unregistration.
3168 */
3169 int unregister_con_driver(const struct consw *csw)
3170 {
3171 int i, retval = -ENODEV;
3172
3173 acquire_console_sem();
3174
3175 /* cannot unregister a bound driver */
3176 if (con_is_bound(csw))
3177 goto err;
3178
3179 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3180 struct con_driver *con_driver = &registered_con_driver[i];
3181
3182 if (con_driver->con == csw &&
3183 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3184 vtconsole_deinit_class_device(con_driver);
3185 class_device_destroy(vtconsole_class,
3186 MKDEV(0, con_driver->node));
3187 con_driver->con = NULL;
3188 con_driver->desc = NULL;
3189 con_driver->class_dev = NULL;
3190 con_driver->node = 0;
3191 con_driver->flag = 0;
3192 con_driver->first = 0;
3193 con_driver->last = 0;
3194 retval = 0;
3195 break;
3196 }
3197 }
3198 err:
3199 release_console_sem();
3200 return retval;
3201 }
3202 EXPORT_SYMBOL(unregister_con_driver);
3203
3204 /*
3205 * If we support more console drivers, this function is used
3206 * when a driver wants to take over some existing consoles
3207 * and become default driver for newly opened ones.
3208 *
3209 * take_over_console is basically a register followed by unbind
3210 */
3211 int take_over_console(const struct consw *csw, int first, int last, int deflt)
3212 {
3213 int err;
3214
3215 err = register_con_driver(csw, first, last);
3216
3217 if (!err)
3218 bind_con_driver(csw, first, last, deflt);
3219
3220 return err;
3221 }
3222
3223 /*
3224 * give_up_console is a wrapper to unregister_con_driver. It will only
3225 * work if driver is fully unbound.
3226 */
3227 void give_up_console(const struct consw *csw)
3228 {
3229 unregister_con_driver(csw);
3230 }
3231
3232 static int __init vtconsole_class_init(void)
3233 {
3234 int i;
3235
3236 vtconsole_class = class_create(THIS_MODULE, "vtconsole");
3237 if (IS_ERR(vtconsole_class)) {
3238 printk(KERN_WARNING "Unable to create vt console class; "
3239 "errno = %ld\n", PTR_ERR(vtconsole_class));
3240 vtconsole_class = NULL;
3241 }
3242
3243 /* Add system drivers to sysfs */
3244 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3245 struct con_driver *con = &registered_con_driver[i];
3246
3247 if (con->con && !con->class_dev) {
3248 con->class_dev =
3249 class_device_create(vtconsole_class, NULL,
3250 MKDEV(0, con->node), NULL,
3251 "vtcon%i", con->node);
3252
3253 if (IS_ERR(con->class_dev)) {
3254 printk(KERN_WARNING "Unable to create "
3255 "class_device for %s; errno = %ld\n",
3256 con->desc, PTR_ERR(con->class_dev));
3257 con->class_dev = NULL;
3258 } else {
3259 vtconsole_init_class_device(con);
3260 }
3261 }
3262 }
3263
3264 return 0;
3265 }
3266 postcore_initcall(vtconsole_class_init);
3267
3268 #endif
3269
3270 /*
3271 * Screen blanking
3272 */
3273
3274 static void set_vesa_blanking(char __user *p)
3275 {
3276 unsigned int mode;
3277 get_user(mode, p + 1);
3278 vesa_blank_mode = (mode < 4) ? mode : 0;
3279 }
3280
3281 void do_blank_screen(int entering_gfx)
3282 {
3283 struct vc_data *vc = vc_cons[fg_console].d;
3284 int i;
3285
3286 WARN_CONSOLE_UNLOCKED();
3287
3288 if (console_blanked) {
3289 if (blank_state == blank_vesa_wait) {
3290 blank_state = blank_off;
3291 vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0);
3292 }
3293 return;
3294 }
3295 if (blank_state != blank_normal_wait)
3296 return;
3297 blank_state = blank_off;
3298
3299 /* entering graphics mode? */
3300 if (entering_gfx) {
3301 hide_cursor(vc);
3302 save_screen(vc);
3303 vc->vc_sw->con_blank(vc, -1, 1);
3304 console_blanked = fg_console + 1;
3305 set_origin(vc);
3306 return;
3307 }
3308
3309 /* don't blank graphics */
3310 if (vc->vc_mode != KD_TEXT) {
3311 console_blanked = fg_console + 1;
3312 return;
3313 }
3314
3315 hide_cursor(vc);
3316 del_timer_sync(&console_timer);
3317 blank_timer_expired = 0;
3318
3319 save_screen(vc);
3320 /* In case we need to reset origin, blanking hook returns 1 */
3321 i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0);
3322 console_blanked = fg_console + 1;
3323 if (i)
3324 set_origin(vc);
3325
3326 if (console_blank_hook && console_blank_hook(1))
3327 return;
3328
3329 if (vesa_off_interval && vesa_blank_mode) {
3330 blank_state = blank_vesa_wait;
3331 mod_timer(&console_timer, jiffies + vesa_off_interval);
3332 }
3333 }
3334 EXPORT_SYMBOL(do_blank_screen);
3335
3336 /*
3337 * Called by timer as well as from vt_console_driver
3338 */
3339 void do_unblank_screen(int leaving_gfx)
3340 {
3341 struct vc_data *vc;
3342
3343 /* This should now always be called from a "sane" (read: can schedule)
3344 * context for the sake of the low level drivers, except in the special
3345 * case of oops_in_progress
3346 */
3347 if (!oops_in_progress)
3348 might_sleep();
3349
3350 WARN_CONSOLE_UNLOCKED();
3351
3352 ignore_poke = 0;
3353 if (!console_blanked)
3354 return;
3355 if (!vc_cons_allocated(fg_console)) {
3356 /* impossible */
3357 printk("unblank_screen: tty %d not allocated ??\n", fg_console+1);
3358 return;
3359 }
3360 vc = vc_cons[fg_console].d;
3361 if (vc->vc_mode != KD_TEXT)
3362 return; /* but leave console_blanked != 0 */
3363
3364 if (blankinterval) {
3365 mod_timer(&console_timer, jiffies + blankinterval);
3366 blank_state = blank_normal_wait;
3367 }
3368
3369 console_blanked = 0;
3370 if (vc->vc_sw->con_blank(vc, 0, leaving_gfx))
3371 /* Low-level driver cannot restore -> do it ourselves */
3372 update_screen(vc);
3373 if (console_blank_hook)
3374 console_blank_hook(0);
3375 set_palette(vc);
3376 set_cursor(vc);
3377 }
3378 EXPORT_SYMBOL(do_unblank_screen);
3379
3380 /*
3381 * This is called by the outside world to cause a forced unblank, mostly for
3382 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
3383 * call it with 1 as an argument and so force a mode restore... that may kill
3384 * X or at least garbage the screen but would also make the Oops visible...
3385 */
3386 void unblank_screen(void)
3387 {
3388 do_unblank_screen(0);
3389 }
3390
3391 /*
3392 * We defer the timer blanking to work queue so it can take the console mutex
3393 * (console operations can still happen at irq time, but only from printk which
3394 * has the console mutex. Not perfect yet, but better than no locking
3395 */
3396 static void blank_screen_t(unsigned long dummy)
3397 {
3398 if (unlikely(!keventd_up())) {
3399 mod_timer(&console_timer, jiffies + blankinterval);
3400 return;
3401 }
3402 blank_timer_expired = 1;
3403 schedule_work(&console_work);
3404 }
3405
3406 void poke_blanked_console(void)
3407 {
3408 WARN_CONSOLE_UNLOCKED();
3409
3410 /* Add this so we quickly catch whoever might call us in a non
3411 * safe context. Nowadays, unblank_screen() isn't to be called in
3412 * atomic contexts and is allowed to schedule (with the special case
3413 * of oops_in_progress, but that isn't of any concern for this
3414 * function. --BenH.
3415 */
3416 might_sleep();
3417
3418 /* This isn't perfectly race free, but a race here would be mostly harmless,
3419 * at worse, we'll do a spurrious blank and it's unlikely
3420 */
3421 del_timer(&console_timer);
3422 blank_timer_expired = 0;
3423
3424 if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS)
3425 return;
3426 if (console_blanked)
3427 unblank_screen();
3428 else if (blankinterval) {
3429 mod_timer(&console_timer, jiffies + blankinterval);
3430 blank_state = blank_normal_wait;
3431 }
3432 }
3433
3434 /*
3435 * Palettes
3436 */
3437
3438 static void set_palette(struct vc_data *vc)
3439 {
3440 WARN_CONSOLE_UNLOCKED();
3441
3442 if (vc->vc_mode != KD_GRAPHICS)
3443 vc->vc_sw->con_set_palette(vc, color_table);
3444 }
3445
3446 static int set_get_cmap(unsigned char __user *arg, int set)
3447 {
3448 int i, j, k;
3449
3450 WARN_CONSOLE_UNLOCKED();
3451
3452 for (i = 0; i < 16; i++)
3453 if (set) {
3454 get_user(default_red[i], arg++);
3455 get_user(default_grn[i], arg++);
3456 get_user(default_blu[i], arg++);
3457 } else {
3458 put_user(default_red[i], arg++);
3459 put_user(default_grn[i], arg++);
3460 put_user(default_blu[i], arg++);
3461 }
3462 if (set) {
3463 for (i = 0; i < MAX_NR_CONSOLES; i++)
3464 if (vc_cons_allocated(i)) {
3465 for (j = k = 0; j < 16; j++) {
3466 vc_cons[i].d->vc_palette[k++] = default_red[j];
3467 vc_cons[i].d->vc_palette[k++] = default_grn[j];
3468 vc_cons[i].d->vc_palette[k++] = default_blu[j];
3469 }
3470 set_palette(vc_cons[i].d);
3471 }
3472 }
3473 return 0;
3474 }
3475
3476 /*
3477 * Load palette into the DAC registers. arg points to a colour
3478 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
3479 */
3480
3481 int con_set_cmap(unsigned char __user *arg)
3482 {
3483 int rc;
3484
3485 acquire_console_sem();
3486 rc = set_get_cmap (arg,1);
3487 release_console_sem();
3488
3489 return rc;
3490 }
3491
3492 int con_get_cmap(unsigned char __user *arg)
3493 {
3494 int rc;
3495
3496 acquire_console_sem();
3497 rc = set_get_cmap (arg,0);
3498 release_console_sem();
3499
3500 return rc;
3501 }
3502
3503 void reset_palette(struct vc_data *vc)
3504 {
3505 int j, k;
3506 for (j=k=0; j<16; j++) {
3507 vc->vc_palette[k++] = default_red[j];
3508 vc->vc_palette[k++] = default_grn[j];
3509 vc->vc_palette[k++] = default_blu[j];
3510 }
3511 set_palette(vc);
3512 }
3513
3514 /*
3515 * Font switching
3516 *
3517 * Currently we only support fonts up to 32 pixels wide, at a maximum height
3518 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
3519 * depending on width) reserved for each character which is kinda wasty, but
3520 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
3521 * is upto the actual low-level console-driver convert data into its favorite
3522 * format (maybe we should add a `fontoffset' field to the `display'
3523 * structure so we won't have to convert the fontdata all the time.
3524 * /Jes
3525 */
3526
3527 #define max_font_size 65536
3528
3529 static int con_font_get(struct vc_data *vc, struct console_font_op *op)
3530 {
3531 struct console_font font;
3532 int rc = -EINVAL;
3533 int c;
3534
3535 if (vc->vc_mode != KD_TEXT)
3536 return -EINVAL;
3537
3538 if (op->data) {
3539 font.data = kmalloc(max_font_size, GFP_KERNEL);
3540 if (!font.data)
3541 return -ENOMEM;
3542 } else
3543 font.data = NULL;
3544
3545 acquire_console_sem();
3546 if (vc->vc_sw->con_font_get)
3547 rc = vc->vc_sw->con_font_get(vc, &font);
3548 else
3549 rc = -ENOSYS;
3550 release_console_sem();
3551
3552 if (rc)
3553 goto out;
3554
3555 c = (font.width+7)/8 * 32 * font.charcount;
3556
3557 if (op->data && font.charcount > op->charcount)
3558 rc = -ENOSPC;
3559 if (!(op->flags & KD_FONT_FLAG_OLD)) {
3560 if (font.width > op->width || font.height > op->height)
3561 rc = -ENOSPC;
3562 } else {
3563 if (font.width != 8)
3564 rc = -EIO;
3565 else if ((op->height && font.height > op->height) ||
3566 font.height > 32)
3567 rc = -ENOSPC;
3568 }
3569 if (rc)
3570 goto out;
3571
3572 op->height = font.height;
3573 op->width = font.width;
3574 op->charcount = font.charcount;
3575
3576 if (op->data && copy_to_user(op->data, font.data, c))
3577 rc = -EFAULT;
3578
3579 out:
3580 kfree(font.data);
3581 return rc;
3582 }
3583
3584 static int con_font_set(struct vc_data *vc, struct console_font_op *op)
3585 {
3586 struct console_font font;
3587 int rc = -EINVAL;
3588 int size;
3589
3590 if (vc->vc_mode != KD_TEXT)
3591 return -EINVAL;
3592 if (!op->data)
3593 return -EINVAL;
3594 if (op->charcount > 512)
3595 return -EINVAL;
3596 if (!op->height) { /* Need to guess font height [compat] */
3597 int h, i;
3598 u8 __user *charmap = op->data;
3599 u8 tmp;
3600
3601 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
3602 so that we can get rid of this soon */
3603 if (!(op->flags & KD_FONT_FLAG_OLD))
3604 return -EINVAL;
3605 for (h = 32; h > 0; h--)
3606 for (i = 0; i < op->charcount; i++) {
3607 if (get_user(tmp, &charmap[32*i+h-1]))
3608 return -EFAULT;
3609 if (tmp)
3610 goto nonzero;
3611 }
3612 return -EINVAL;
3613 nonzero:
3614 op->height = h;
3615 }
3616 if (op->width <= 0 || op->width > 32 || op->height > 32)
3617 return -EINVAL;
3618 size = (op->width+7)/8 * 32 * op->charcount;
3619 if (size > max_font_size)
3620 return -ENOSPC;
3621 font.charcount = op->charcount;
3622 font.height = op->height;
3623 font.width = op->width;
3624 font.data = kmalloc(size, GFP_KERNEL);
3625 if (!font.data)
3626 return -ENOMEM;
3627 if (copy_from_user(font.data, op->data, size)) {
3628 kfree(font.data);
3629 return -EFAULT;
3630 }
3631 acquire_console_sem();
3632 if (vc->vc_sw->con_font_set)
3633 rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
3634 else
3635 rc = -ENOSYS;
3636 release_console_sem();
3637 kfree(font.data);
3638 return rc;
3639 }
3640
3641 static int con_font_default(struct vc_data *vc, struct console_font_op *op)
3642 {
3643 struct console_font font = {.width = op->width, .height = op->height};
3644 char name[MAX_FONT_NAME];
3645 char *s = name;
3646 int rc;
3647
3648 if (vc->vc_mode != KD_TEXT)
3649 return -EINVAL;
3650
3651 if (!op->data)
3652 s = NULL;
3653 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0)
3654 return -EFAULT;
3655 else
3656 name[MAX_FONT_NAME - 1] = 0;
3657
3658 acquire_console_sem();
3659 if (vc->vc_sw->con_font_default)
3660 rc = vc->vc_sw->con_font_default(vc, &font, s);
3661 else
3662 rc = -ENOSYS;
3663 release_console_sem();
3664 if (!rc) {
3665 op->width = font.width;
3666 op->height = font.height;
3667 }
3668 return rc;
3669 }
3670
3671 static int con_font_copy(struct vc_data *vc, struct console_font_op *op)
3672 {
3673 int con = op->height;
3674 int rc;
3675
3676 if (vc->vc_mode != KD_TEXT)
3677 return -EINVAL;
3678
3679 acquire_console_sem();
3680 if (!vc->vc_sw->con_font_copy)
3681 rc = -ENOSYS;
3682 else if (con < 0 || !vc_cons_allocated(con))
3683 rc = -ENOTTY;
3684 else if (con == vc->vc_num) /* nothing to do */
3685 rc = 0;
3686 else
3687 rc = vc->vc_sw->con_font_copy(vc, con);
3688 release_console_sem();
3689 return rc;
3690 }
3691
3692 int con_font_op(struct vc_data *vc, struct console_font_op *op)
3693 {
3694 switch (op->op) {
3695 case KD_FONT_OP_SET:
3696 return con_font_set(vc, op);
3697 case KD_FONT_OP_GET:
3698 return con_font_get(vc, op);
3699 case KD_FONT_OP_SET_DEFAULT:
3700 return con_font_default(vc, op);
3701 case KD_FONT_OP_COPY:
3702 return con_font_copy(vc, op);
3703 }
3704 return -ENOSYS;
3705 }
3706
3707 /*
3708 * Interface exported to selection and vcs.
3709 */
3710
3711 /* used by selection */
3712 u16 screen_glyph(struct vc_data *vc, int offset)
3713 {
3714 u16 w = scr_readw(screenpos(vc, offset, 1));
3715 u16 c = w & 0xff;
3716
3717 if (w & vc->vc_hi_font_mask)
3718 c |= 0x100;
3719 return c;
3720 }
3721
3722 /* used by vcs - note the word offset */
3723 unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed)
3724 {
3725 return screenpos(vc, 2 * w_offset, viewed);
3726 }
3727
3728 void getconsxy(struct vc_data *vc, unsigned char *p)
3729 {
3730 p[0] = vc->vc_x;
3731 p[1] = vc->vc_y;
3732 }
3733
3734 void putconsxy(struct vc_data *vc, unsigned char *p)
3735 {
3736 hide_cursor(vc);
3737 gotoxy(vc, p[0], p[1]);
3738 set_cursor(vc);
3739 }
3740
3741 u16 vcs_scr_readw(struct vc_data *vc, const u16 *org)
3742 {
3743 if ((unsigned long)org == vc->vc_pos && softcursor_original != -1)
3744 return softcursor_original;
3745 return scr_readw(org);
3746 }
3747
3748 void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org)
3749 {
3750 scr_writew(val, org);
3751 if ((unsigned long)org == vc->vc_pos) {
3752 softcursor_original = -1;
3753 add_softcursor(vc);
3754 }
3755 }
3756
3757 /*
3758 * Visible symbols for modules
3759 */
3760
3761 EXPORT_SYMBOL(color_table);
3762 EXPORT_SYMBOL(default_red);
3763 EXPORT_SYMBOL(default_grn);
3764 EXPORT_SYMBOL(default_blu);
3765 EXPORT_SYMBOL(update_region);
3766 EXPORT_SYMBOL(redraw_screen);
3767 EXPORT_SYMBOL(vc_resize);
3768 EXPORT_SYMBOL(fg_console);
3769 EXPORT_SYMBOL(console_blank_hook);
3770 EXPORT_SYMBOL(console_blanked);
3771 EXPORT_SYMBOL(vc_cons);
3772 #ifndef VT_SINGLE_DRIVER
3773 EXPORT_SYMBOL(take_over_console);
3774 EXPORT_SYMBOL(give_up_console);
3775 #endif
A Kernel for the Dreambox dm7025.