2 * linux/drivers/char/vt.c
4 * Copyright (C) 1991, 1992 Linus Torvalds
8 * Hopefully this will be a rather complete VT102 implementation.
10 * Beeping thanks to John T Kohl.
12 * Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics
13 * Chars, and VT100 enhancements by Peter MacDonald.
15 * Copy and paste function by Andrew Haylett,
16 * some enhancements by Alessandro Rubini.
18 * Code to check for different video-cards mostly by Galen Hunt,
19 * <g-hunt@ee.utah.edu>
21 * Rudimentary ISO 10646/Unicode/UTF-8 character set support by
22 * Markus Kuhn, <mskuhn@immd4.informatik.uni-erlangen.de>.
24 * Dynamic allocation of consoles, aeb@cwi.nl, May 1994
25 * Resizing of consoles, aeb, 940926
27 * Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94
30 * User-defined bell sound, new setterm control sequences and printk
31 * redirection by Martin Mares <mj@k332.feld.cvut.cz> 19-Nov-95
33 * APM screenblank bug fixed Takashi Manabe <manabe@roy.dsl.tutics.tut.jp>
35 * Merge with the abstract console driver by Geert Uytterhoeven
36 * <geert@linux-m68k.org>, Jan 1997.
38 * Original m68k console driver modifications by
40 * - Arno Griffioen <arno@usn.nl>
41 * - David Carter <carter@cs.bris.ac.uk>
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).
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).
52 * Support for changeable cursor shape
53 * by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997
55 * Ported to i386 and con_scrolldelta fixed
56 * by Emmanuel Marty <core@ggi-project.org>, April 1998
58 * Resurrected character buffers in videoram plus lots of other trickery
59 * by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998
61 * Removed old-style timers, introduced console_timer, made timer
62 * deletion SMP-safe. 17Jun00, Andrew Morton <andrewm@uow.edu.au>
64 * Removed console_lock, enabled interrupts across all console operations
65 * 13 March 2001, Andrew Morton
67 * Fixed UTF-8 mode so alternate charset modes always work according
68 * to control sequences interpreted in do_con_trol function
69 * preserving backward VT100 semigraphics compatibility,
70 * malformed UTF sequences represented as sequences of replacement glyphs,
71 * original codes or '?' as a last resort if replacement glyph is undefined
72 * by Adam Tla/lka <atlka@pg.gda.pl>, Aug 2006
75 #include <linux/module.h>
76 #include <linux/types.h>
77 #include <linux/sched.h>
78 #include <linux/tty.h>
79 #include <linux/tty_flip.h>
80 #include <linux/kernel.h>
81 #include <linux/string.h>
82 #include <linux/errno.h>
84 #include <linux/slab.h>
85 #include <linux/major.h>
87 #include <linux/console.h>
88 #include <linux/init.h>
89 #include <linux/vt_kern.h>
90 #include <linux/selection.h>
91 #include <linux/tiocl.h>
92 #include <linux/kbd_kern.h>
93 #include <linux/consolemap.h>
94 #include <linux/timer.h>
95 #include <linux/interrupt.h>
96 #include <linux/workqueue.h>
97 #include <linux/bootmem.h>
99 #include <linux/font.h>
100 #include <linux/bitops.h>
103 #include <asm/system.h>
104 #include <asm/uaccess.h>
106 #define MAX_NR_CON_DRIVER 16
108 #define CON_DRIVER_FLAG_MODULE 1
109 #define CON_DRIVER_FLAG_INIT 2
110 #define CON_DRIVER_FLAG_ATTR 4
113 const struct consw
*con
;
122 static struct con_driver registered_con_driver
[MAX_NR_CON_DRIVER
];
123 const struct consw
*conswitchp
;
125 /* A bitmap for codes <32. A bit of 1 indicates that the code
126 * corresponding to that bit number invokes some special action
127 * (such as cursor movement) and should not be displayed as a
128 * glyph unless the disp_ctrl mode is explicitly enabled.
130 #define CTRL_ACTION 0x0d00ff81
131 #define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */
134 * Here is the default bell parameters: 750HZ, 1/8th of a second
136 #define DEFAULT_BELL_PITCH 750
137 #define DEFAULT_BELL_DURATION (HZ/8)
139 struct vc vc_cons
[MAX_NR_CONSOLES
];
141 #ifndef VT_SINGLE_DRIVER
142 static const struct consw
*con_driver_map
[MAX_NR_CONSOLES
];
145 static int con_open(struct tty_struct
*, struct file
*);
146 static void vc_init(struct vc_data
*vc
, unsigned int rows
,
147 unsigned int cols
, int do_clear
);
148 static void gotoxy(struct vc_data
*vc
, int new_x
, int new_y
);
149 static void save_cur(struct vc_data
*vc
);
150 static void reset_terminal(struct vc_data
*vc
, int do_clear
);
151 static void con_flush_chars(struct tty_struct
*tty
);
152 static int set_vesa_blanking(char __user
*p
);
153 static void set_cursor(struct vc_data
*vc
);
154 static void hide_cursor(struct vc_data
*vc
);
155 static void console_callback(struct work_struct
*ignored
);
156 static void blank_screen_t(unsigned long dummy
);
157 static void set_palette(struct vc_data
*vc
);
159 static int printable
; /* Is console ready for printing? */
162 * ignore_poke: don't unblank the screen when things are typed. This is
163 * mainly for the privacy of braille terminal users.
165 static int ignore_poke
;
167 int do_poke_blanked_console
;
170 static int vesa_blank_mode
; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
171 static int blankinterval
= 10*60*HZ
;
172 static int vesa_off_interval
;
174 static DECLARE_WORK(console_work
, console_callback
);
177 * fg_console is the current virtual console,
178 * last_console is the last used one,
179 * want_console is the console we want to switch to,
180 * kmsg_redirect is the console for kernel messages,
184 int want_console
= -1;
188 * For each existing display, we have a pointer to console currently visible
189 * on that display, allowing consoles other than fg_console to be refreshed
190 * appropriately. Unless the low-level driver supplies its own display_fg
191 * variable, we use this one for the "master display".
193 static struct vc_data
*master_display_fg
;
196 * Unfortunately, we need to delay tty echo when we're currently writing to the
197 * console since the code is (and always was) not re-entrant, so we schedule
198 * all flip requests to process context with schedule-task() and run it from
199 * console_callback().
203 * For the same reason, we defer scrollback to the console callback.
205 static int scrollback_delta
;
208 * Hook so that the power management routines can (un)blank
209 * the console on our behalf.
211 int (*console_blank_hook
)(int);
213 static DEFINE_TIMER(console_timer
, blank_screen_t
, 0, 0);
214 static int blank_state
;
215 static int blank_timer_expired
;
223 * Low-Level Functions
226 #define IS_FG(vc) ((vc)->vc_num == fg_console)
228 #ifdef VT_BUF_VRAM_ONLY
229 #define DO_UPDATE(vc) 0
231 #define DO_UPDATE(vc) CON_IS_VISIBLE(vc)
234 static inline unsigned short *screenpos(struct vc_data
*vc
, int offset
, int viewed
)
239 p
= (unsigned short *)(vc
->vc_origin
+ offset
);
240 else if (!vc
->vc_sw
->con_screen_pos
)
241 p
= (unsigned short *)(vc
->vc_visible_origin
+ offset
);
243 p
= vc
->vc_sw
->con_screen_pos(vc
, offset
);
247 static inline void scrolldelta(int lines
)
249 scrollback_delta
+= lines
;
250 schedule_console_callback();
253 void schedule_console_callback(void)
255 schedule_work(&console_work
);
258 static void scrup(struct vc_data
*vc
, unsigned int t
, unsigned int b
, int nr
)
260 unsigned short *d
, *s
;
264 if (b
> vc
->vc_rows
|| t
>= b
|| nr
< 1)
266 if (CON_IS_VISIBLE(vc
) && vc
->vc_sw
->con_scroll(vc
, t
, b
, SM_UP
, nr
))
268 d
= (unsigned short *)(vc
->vc_origin
+ vc
->vc_size_row
* t
);
269 s
= (unsigned short *)(vc
->vc_origin
+ vc
->vc_size_row
* (t
+ nr
));
270 scr_memmovew(d
, s
, (b
- t
- nr
) * vc
->vc_size_row
);
271 scr_memsetw(d
+ (b
- t
- nr
) * vc
->vc_cols
, vc
->vc_video_erase_char
,
272 vc
->vc_size_row
* nr
);
275 static void scrdown(struct vc_data
*vc
, unsigned int t
, unsigned int b
, int nr
)
282 if (b
> vc
->vc_rows
|| t
>= b
|| nr
< 1)
284 if (CON_IS_VISIBLE(vc
) && vc
->vc_sw
->con_scroll(vc
, t
, b
, SM_DOWN
, nr
))
286 s
= (unsigned short *)(vc
->vc_origin
+ vc
->vc_size_row
* t
);
287 step
= vc
->vc_cols
* nr
;
288 scr_memmovew(s
+ step
, s
, (b
- t
- nr
) * vc
->vc_size_row
);
289 scr_memsetw(s
, vc
->vc_video_erase_char
, 2 * step
);
292 static void do_update_region(struct vc_data
*vc
, unsigned long start
, int count
)
294 #ifndef VT_BUF_VRAM_ONLY
295 unsigned int xx
, yy
, offset
;
299 if (!vc
->vc_sw
->con_getxy
) {
300 offset
= (start
- vc
->vc_origin
) / 2;
301 xx
= offset
% vc
->vc_cols
;
302 yy
= offset
/ vc
->vc_cols
;
305 start
= vc
->vc_sw
->con_getxy(vc
, start
, &nxx
, &nyy
);
309 u16 attrib
= scr_readw(p
) & 0xff00;
312 while (xx
< vc
->vc_cols
&& count
) {
313 if (attrib
!= (scr_readw(p
) & 0xff00)) {
315 vc
->vc_sw
->con_putcs(vc
, q
, p
-q
, yy
, startx
);
318 attrib
= scr_readw(p
) & 0xff00;
325 vc
->vc_sw
->con_putcs(vc
, q
, p
-q
, yy
, startx
);
330 if (vc
->vc_sw
->con_getxy
) {
332 start
= vc
->vc_sw
->con_getxy(vc
, start
, NULL
, NULL
);
338 void update_region(struct vc_data
*vc
, unsigned long start
, int count
)
340 WARN_CONSOLE_UNLOCKED();
344 do_update_region(vc
, start
, count
);
349 /* Structure of attributes is hardware-dependent */
351 static u8
build_attr(struct vc_data
*vc
, u8 _color
, u8 _intensity
, u8 _blink
, u8 _underline
, u8 _reverse
)
353 if (vc
->vc_sw
->con_build_attr
)
354 return vc
->vc_sw
->con_build_attr(vc
, _color
, _intensity
, _blink
, _underline
, _reverse
);
356 #ifndef VT_BUF_VRAM_ONLY
358 * ++roman: I completely changed the attribute format for monochrome
359 * mode (!can_do_color). The formerly used MDA (monochrome display
360 * adapter) format didn't allow the combination of certain effects.
361 * Now the attribute is just a bit vector:
362 * Bit 0..1: intensity (0..2)
369 if (!vc
->vc_can_do_color
)
371 (_underline
? 4 : 0) |
375 a
= (a
& 0xf0) | vc
->vc_ulcolor
;
376 else if (_intensity
== 0)
377 a
= (a
& 0xf0) | vc
->vc_ulcolor
;
379 a
= ((a
) & 0x88) | ((((a
) >> 4) | ((a
) << 4)) & 0x77);
384 if (vc
->vc_hi_font_mask
== 0x100)
393 static void update_attr(struct vc_data
*vc
)
395 vc
->vc_attr
= build_attr(vc
, vc
->vc_color
, vc
->vc_intensity
, vc
->vc_blink
, vc
->vc_underline
, vc
->vc_reverse
^ vc
->vc_decscnm
);
396 vc
->vc_video_erase_char
= (build_attr(vc
, vc
->vc_color
, 1, vc
->vc_blink
, 0, vc
->vc_decscnm
) << 8) | ' ';
399 /* Note: inverting the screen twice should revert to the original state */
400 void invert_screen(struct vc_data
*vc
, int offset
, int count
, int viewed
)
404 WARN_CONSOLE_UNLOCKED();
407 p
= screenpos(vc
, offset
, viewed
);
408 if (vc
->vc_sw
->con_invert_region
)
409 vc
->vc_sw
->con_invert_region(vc
, p
, count
);
410 #ifndef VT_BUF_VRAM_ONLY
416 if (!vc
->vc_can_do_color
) {
423 } else if (vc
->vc_hi_font_mask
== 0x100) {
426 a
= ((a
) & 0x11ff) | (((a
) & 0xe000) >> 4) | (((a
) & 0x0e00) << 4);
433 a
= ((a
) & 0x88ff) | (((a
) & 0x7000) >> 4) | (((a
) & 0x0700) << 4);
441 do_update_region(vc
, (unsigned long) p
, count
);
444 /* used by selection: complement pointer position */
445 void complement_pos(struct vc_data
*vc
, int offset
)
447 static int old_offset
= -1;
448 static unsigned short old
;
449 static unsigned short oldx
, oldy
;
451 WARN_CONSOLE_UNLOCKED();
453 if (old_offset
!= -1 && old_offset
>= 0 &&
454 old_offset
< vc
->vc_screenbuf_size
) {
455 scr_writew(old
, screenpos(vc
, old_offset
, 1));
457 vc
->vc_sw
->con_putc(vc
, old
, oldy
, oldx
);
462 if (offset
!= -1 && offset
>= 0 &&
463 offset
< vc
->vc_screenbuf_size
) {
466 p
= screenpos(vc
, offset
, 1);
468 new = old
^ vc
->vc_complement_mask
;
471 oldx
= (offset
>> 1) % vc
->vc_cols
;
472 oldy
= (offset
>> 1) / vc
->vc_cols
;
473 vc
->vc_sw
->con_putc(vc
, new, oldy
, oldx
);
479 static void insert_char(struct vc_data
*vc
, unsigned int nr
)
481 unsigned short *p
, *q
= (unsigned short *)vc
->vc_pos
;
483 p
= q
+ vc
->vc_cols
- nr
- vc
->vc_x
;
485 scr_writew(scr_readw(p
), p
+ nr
);
486 scr_memsetw(q
, vc
->vc_video_erase_char
, nr
* 2);
487 vc
->vc_need_wrap
= 0;
489 unsigned short oldattr
= vc
->vc_attr
;
490 vc
->vc_sw
->con_bmove(vc
, vc
->vc_y
, vc
->vc_x
, vc
->vc_y
, vc
->vc_x
+ nr
, 1,
491 vc
->vc_cols
- vc
->vc_x
- nr
);
492 vc
->vc_attr
= vc
->vc_video_erase_char
>> 8;
494 vc
->vc_sw
->con_putc(vc
, vc
->vc_video_erase_char
, vc
->vc_y
, vc
->vc_x
+ nr
);
495 vc
->vc_attr
= oldattr
;
499 static void delete_char(struct vc_data
*vc
, unsigned int nr
)
501 unsigned int i
= vc
->vc_x
;
502 unsigned short *p
= (unsigned short *)vc
->vc_pos
;
504 while (++i
<= vc
->vc_cols
- nr
) {
505 scr_writew(scr_readw(p
+nr
), p
);
508 scr_memsetw(p
, vc
->vc_video_erase_char
, nr
* 2);
509 vc
->vc_need_wrap
= 0;
511 unsigned short oldattr
= vc
->vc_attr
;
512 vc
->vc_sw
->con_bmove(vc
, vc
->vc_y
, vc
->vc_x
+ nr
, vc
->vc_y
, vc
->vc_x
, 1,
513 vc
->vc_cols
- vc
->vc_x
- nr
);
514 vc
->vc_attr
= vc
->vc_video_erase_char
>> 8;
516 vc
->vc_sw
->con_putc(vc
, vc
->vc_video_erase_char
, vc
->vc_y
,
517 vc
->vc_cols
- 1 - nr
);
518 vc
->vc_attr
= oldattr
;
522 static int softcursor_original
;
524 static void add_softcursor(struct vc_data
*vc
)
526 int i
= scr_readw((u16
*) vc
->vc_pos
);
527 u32 type
= vc
->vc_cursor_type
;
529 if (! (type
& 0x10)) return;
530 if (softcursor_original
!= -1) return;
531 softcursor_original
= i
;
532 i
|= ((type
>> 8) & 0xff00 );
533 i
^= ((type
) & 0xff00 );
534 if ((type
& 0x20) && ((softcursor_original
& 0x7000) == (i
& 0x7000))) i
^= 0x7000;
535 if ((type
& 0x40) && ((i
& 0x700) == ((i
& 0x7000) >> 4))) i
^= 0x0700;
536 scr_writew(i
, (u16
*) vc
->vc_pos
);
538 vc
->vc_sw
->con_putc(vc
, i
, vc
->vc_y
, vc
->vc_x
);
541 static void hide_softcursor(struct vc_data
*vc
)
543 if (softcursor_original
!= -1) {
544 scr_writew(softcursor_original
, (u16
*)vc
->vc_pos
);
546 vc
->vc_sw
->con_putc(vc
, softcursor_original
,
548 softcursor_original
= -1;
552 static void hide_cursor(struct vc_data
*vc
)
556 vc
->vc_sw
->con_cursor(vc
, CM_ERASE
);
560 static void set_cursor(struct vc_data
*vc
)
562 if (!IS_FG(vc
) || console_blanked
||
563 vc
->vc_mode
== KD_GRAPHICS
)
569 if ((vc
->vc_cursor_type
& 0x0f) != 1)
570 vc
->vc_sw
->con_cursor(vc
, CM_DRAW
);
575 static void set_origin(struct vc_data
*vc
)
577 WARN_CONSOLE_UNLOCKED();
579 if (!CON_IS_VISIBLE(vc
) ||
580 !vc
->vc_sw
->con_set_origin
||
581 !vc
->vc_sw
->con_set_origin(vc
))
582 vc
->vc_origin
= (unsigned long)vc
->vc_screenbuf
;
583 vc
->vc_visible_origin
= vc
->vc_origin
;
584 vc
->vc_scr_end
= vc
->vc_origin
+ vc
->vc_screenbuf_size
;
585 vc
->vc_pos
= vc
->vc_origin
+ vc
->vc_size_row
* vc
->vc_y
+ 2 * vc
->vc_x
;
588 static inline void save_screen(struct vc_data
*vc
)
590 WARN_CONSOLE_UNLOCKED();
592 if (vc
->vc_sw
->con_save_screen
)
593 vc
->vc_sw
->con_save_screen(vc
);
597 * Redrawing of screen
600 static void clear_buffer_attributes(struct vc_data
*vc
)
602 unsigned short *p
= (unsigned short *)vc
->vc_origin
;
603 int count
= vc
->vc_screenbuf_size
/ 2;
604 int mask
= vc
->vc_hi_font_mask
| 0xff;
606 for (; count
> 0; count
--, p
++) {
607 scr_writew((scr_readw(p
)&mask
) | (vc
->vc_video_erase_char
& ~mask
), p
);
611 void redraw_screen(struct vc_data
*vc
, int is_switch
)
615 WARN_CONSOLE_UNLOCKED();
619 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
624 struct vc_data
*old_vc
= vc_cons
[fg_console
].d
;
627 if (!CON_IS_VISIBLE(vc
))
629 *vc
->vc_display_fg
= vc
;
630 fg_console
= vc
->vc_num
;
632 if (!CON_IS_VISIBLE(old_vc
)) {
643 int old_was_color
= vc
->vc_can_do_color
;
646 update
= vc
->vc_sw
->con_switch(vc
);
649 * If console changed from mono<->color, the best we can do
650 * is to clear the buffer attributes. As it currently stands,
651 * rebuilding new attributes from the old buffer is not doable
652 * without overly complex code.
654 if (old_was_color
!= vc
->vc_can_do_color
) {
656 clear_buffer_attributes(vc
);
658 if (update
&& vc
->vc_mode
!= KD_GRAPHICS
)
659 do_update_region(vc
, vc
->vc_origin
, vc
->vc_screenbuf_size
/ 2);
664 compute_shiftstate();
669 * Allocation, freeing and resizing of VTs.
672 int vc_cons_allocated(unsigned int i
)
674 return (i
< MAX_NR_CONSOLES
&& vc_cons
[i
].d
);
677 static void visual_init(struct vc_data
*vc
, int num
, int init
)
679 /* ++Geert: vc->vc_sw->con_init determines console size */
681 module_put(vc
->vc_sw
->owner
);
682 vc
->vc_sw
= conswitchp
;
683 #ifndef VT_SINGLE_DRIVER
684 if (con_driver_map
[num
])
685 vc
->vc_sw
= con_driver_map
[num
];
687 __module_get(vc
->vc_sw
->owner
);
689 vc
->vc_display_fg
= &master_display_fg
;
690 vc
->vc_uni_pagedir_loc
= &vc
->vc_uni_pagedir
;
691 vc
->vc_uni_pagedir
= 0;
692 vc
->vc_hi_font_mask
= 0;
693 vc
->vc_complement_mask
= 0;
694 vc
->vc_can_do_color
= 0;
695 vc
->vc_sw
->con_init(vc
, init
);
696 if (!vc
->vc_complement_mask
)
697 vc
->vc_complement_mask
= vc
->vc_can_do_color
? 0x7700 : 0x0800;
698 vc
->vc_s_complement_mask
= vc
->vc_complement_mask
;
699 vc
->vc_size_row
= vc
->vc_cols
<< 1;
700 vc
->vc_screenbuf_size
= vc
->vc_rows
* vc
->vc_size_row
;
703 int vc_allocate(unsigned int currcons
) /* return 0 on success */
705 WARN_CONSOLE_UNLOCKED();
707 if (currcons
>= MAX_NR_CONSOLES
)
709 if (!vc_cons
[currcons
].d
) {
712 /* prevent users from taking too much memory */
713 if (currcons
>= MAX_NR_USER_CONSOLES
&& !capable(CAP_SYS_RESOURCE
))
716 /* due to the granularity of kmalloc, we waste some memory here */
717 /* the alloc is done in two steps, to optimize the common situation
718 of a 25x80 console (structsize=216, screenbuf_size=4000) */
719 /* although the numbers above are not valid since long ago, the
720 point is still up-to-date and the comment still has its value
721 even if only as a historical artifact. --mj, July 1998 */
722 vc
= kmalloc(sizeof(struct vc_data
), GFP_KERNEL
);
725 memset(vc
, 0, sizeof(*vc
));
726 vc_cons
[currcons
].d
= vc
;
727 visual_init(vc
, currcons
, 1);
728 if (!*vc
->vc_uni_pagedir_loc
)
729 con_set_default_unimap(vc
);
730 if (!vc
->vc_kmalloced
)
731 vc
->vc_screenbuf
= kmalloc(vc
->vc_screenbuf_size
, GFP_KERNEL
);
732 if (!vc
->vc_screenbuf
) {
734 vc_cons
[currcons
].d
= NULL
;
737 vc
->vc_kmalloced
= 1;
738 vc_init(vc
, vc
->vc_rows
, vc
->vc_cols
, 1);
743 static inline int resize_screen(struct vc_data
*vc
, int width
, int height
)
745 /* Resizes the resolution of the display adapater */
748 if (vc
->vc_mode
!= KD_GRAPHICS
&& vc
->vc_sw
->con_resize
)
749 err
= vc
->vc_sw
->con_resize(vc
, width
, height
);
754 * Change # of rows and columns (0 means unchanged/the size of fg_console)
755 * [this is to be used together with some user program
756 * like resize that changes the hardware videomode]
758 #define VC_RESIZE_MAXCOL (32767)
759 #define VC_RESIZE_MAXROW (32767)
760 int vc_resize(struct vc_data
*vc
, unsigned int cols
, unsigned int lines
)
762 unsigned long old_origin
, new_origin
, new_scr_end
, rlth
, rrem
, err
= 0;
763 unsigned int old_cols
, old_rows
, old_row_size
, old_screen_size
;
764 unsigned int new_cols
, new_rows
, new_row_size
, new_screen_size
;
766 unsigned short *newscreen
;
768 WARN_CONSOLE_UNLOCKED();
773 if (cols
> VC_RESIZE_MAXCOL
|| lines
> VC_RESIZE_MAXROW
)
776 new_cols
= (cols
? cols
: vc
->vc_cols
);
777 new_rows
= (lines
? lines
: vc
->vc_rows
);
778 new_row_size
= new_cols
<< 1;
779 new_screen_size
= new_row_size
* new_rows
;
781 if (new_cols
== vc
->vc_cols
&& new_rows
== vc
->vc_rows
)
784 newscreen
= kmalloc(new_screen_size
, GFP_USER
);
788 old_rows
= vc
->vc_rows
;
789 old_cols
= vc
->vc_cols
;
790 old_row_size
= vc
->vc_size_row
;
791 old_screen_size
= vc
->vc_screenbuf_size
;
793 err
= resize_screen(vc
, new_cols
, new_rows
);
799 vc
->vc_rows
= new_rows
;
800 vc
->vc_cols
= new_cols
;
801 vc
->vc_size_row
= new_row_size
;
802 vc
->vc_screenbuf_size
= new_screen_size
;
804 rlth
= min(old_row_size
, new_row_size
);
805 rrem
= new_row_size
- rlth
;
806 old_origin
= vc
->vc_origin
;
807 new_origin
= (long) newscreen
;
808 new_scr_end
= new_origin
+ new_screen_size
;
810 if (vc
->vc_y
> new_rows
) {
811 if (old_rows
- vc
->vc_y
< new_rows
) {
813 * Cursor near the bottom, copy contents from the
816 old_origin
+= (old_rows
- new_rows
) * old_row_size
;
817 end
= vc
->vc_scr_end
;
820 * Cursor is in no man's land, copy 1/2 screenful
821 * from the top and bottom of cursor position
823 old_origin
+= (vc
->vc_y
- new_rows
/2) * old_row_size
;
824 end
= old_origin
+ (old_row_size
* new_rows
);
828 * Cursor near the top, copy contents from the top of buffer
830 end
= (old_rows
> new_rows
) ? old_origin
+
831 (old_row_size
* new_rows
) :
836 while (old_origin
< end
) {
837 scr_memcpyw((unsigned short *) new_origin
,
838 (unsigned short *) old_origin
, rlth
);
840 scr_memsetw((void *)(new_origin
+ rlth
),
841 vc
->vc_video_erase_char
, rrem
);
842 old_origin
+= old_row_size
;
843 new_origin
+= new_row_size
;
845 if (new_scr_end
> new_origin
)
846 scr_memsetw((void *)new_origin
, vc
->vc_video_erase_char
,
847 new_scr_end
- new_origin
);
848 if (vc
->vc_kmalloced
)
849 kfree(vc
->vc_screenbuf
);
850 vc
->vc_screenbuf
= newscreen
;
851 vc
->vc_kmalloced
= 1;
852 vc
->vc_screenbuf_size
= new_screen_size
;
855 /* do part of a reset_terminal() */
857 vc
->vc_bottom
= vc
->vc_rows
;
858 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
);
862 struct winsize ws
, *cws
= &vc
->vc_tty
->winsize
;
864 memset(&ws
, 0, sizeof(ws
));
865 ws
.ws_row
= vc
->vc_rows
;
866 ws
.ws_col
= vc
->vc_cols
;
867 ws
.ws_ypixel
= vc
->vc_scan_lines
;
868 if ((ws
.ws_row
!= cws
->ws_row
|| ws
.ws_col
!= cws
->ws_col
) &&
870 kill_pgrp(vc
->vc_tty
->pgrp
, SIGWINCH
, 1);
874 if (CON_IS_VISIBLE(vc
))
879 int vc_lock_resize(struct vc_data
*vc
, unsigned int cols
, unsigned int lines
)
883 acquire_console_sem();
884 rc
= vc_resize(vc
, cols
, lines
);
885 release_console_sem();
889 void vc_deallocate(unsigned int currcons
)
891 WARN_CONSOLE_UNLOCKED();
893 if (vc_cons_allocated(currcons
)) {
894 struct vc_data
*vc
= vc_cons
[currcons
].d
;
895 vc
->vc_sw
->con_deinit(vc
);
897 module_put(vc
->vc_sw
->owner
);
898 if (vc
->vc_kmalloced
)
899 kfree(vc
->vc_screenbuf
);
900 if (currcons
>= MIN_NR_CONSOLES
)
902 vc_cons
[currcons
].d
= NULL
;
910 #define set_kbd(vc, x) set_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
911 #define clr_kbd(vc, x) clr_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
912 #define is_kbd(vc, x) vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
914 #define decarm VC_REPEAT
915 #define decckm VC_CKMODE
916 #define kbdapplic VC_APPLIC
920 * this is what the terminal answers to a ESC-Z or csi0c query.
922 #define VT100ID "\033[?1;2c"
923 #define VT102ID "\033[?6c"
925 unsigned char color_table
[] = { 0, 4, 2, 6, 1, 5, 3, 7,
926 8,12,10,14, 9,13,11,15 };
928 /* the default colour table, for VGA+ colour systems */
929 int default_red
[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
930 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
931 int default_grn
[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
932 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
933 int default_blu
[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
934 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
937 * gotoxy() must verify all boundaries, because the arguments
938 * might also be negative. If the given position is out of
939 * bounds, the cursor is placed at the nearest margin.
941 static void gotoxy(struct vc_data
*vc
, int new_x
, int new_y
)
948 if (new_x
>= vc
->vc_cols
)
949 vc
->vc_x
= vc
->vc_cols
- 1;
956 max_y
= vc
->vc_bottom
;
963 else if (new_y
>= max_y
)
964 vc
->vc_y
= max_y
- 1;
967 vc
->vc_pos
= vc
->vc_origin
+ vc
->vc_y
* vc
->vc_size_row
+ (vc
->vc_x
<<1);
968 vc
->vc_need_wrap
= 0;
971 /* for absolute user moves, when decom is set */
972 static void gotoxay(struct vc_data
*vc
, int new_x
, int new_y
)
974 gotoxy(vc
, new_x
, vc
->vc_decom
? (vc
->vc_top
+ new_y
) : new_y
);
977 void scrollback(struct vc_data
*vc
, int lines
)
980 lines
= vc
->vc_rows
/ 2;
984 void scrollfront(struct vc_data
*vc
, int lines
)
987 lines
= vc
->vc_rows
/ 2;
991 static void lf(struct vc_data
*vc
)
993 /* don't scroll if above bottom of scrolling region, or
994 * if below scrolling region
996 if (vc
->vc_y
+ 1 == vc
->vc_bottom
)
997 scrup(vc
, vc
->vc_top
, vc
->vc_bottom
, 1);
998 else if (vc
->vc_y
< vc
->vc_rows
- 1) {
1000 vc
->vc_pos
+= vc
->vc_size_row
;
1002 vc
->vc_need_wrap
= 0;
1005 static void ri(struct vc_data
*vc
)
1007 /* don't scroll if below top of scrolling region, or
1008 * if above scrolling region
1010 if (vc
->vc_y
== vc
->vc_top
)
1011 scrdown(vc
, vc
->vc_top
, vc
->vc_bottom
, 1);
1012 else if (vc
->vc_y
> 0) {
1014 vc
->vc_pos
-= vc
->vc_size_row
;
1016 vc
->vc_need_wrap
= 0;
1019 static inline void cr(struct vc_data
*vc
)
1021 vc
->vc_pos
-= vc
->vc_x
<< 1;
1022 vc
->vc_need_wrap
= vc
->vc_x
= 0;
1025 static inline void bs(struct vc_data
*vc
)
1030 vc
->vc_need_wrap
= 0;
1034 static inline void del(struct vc_data
*vc
)
1039 static void csi_J(struct vc_data
*vc
, int vpar
)
1042 unsigned short * start
;
1045 case 0: /* erase from cursor to end of display */
1046 count
= (vc
->vc_scr_end
- vc
->vc_pos
) >> 1;
1047 start
= (unsigned short *)vc
->vc_pos
;
1048 if (DO_UPDATE(vc
)) {
1049 /* do in two stages */
1050 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, vc
->vc_x
, 1,
1051 vc
->vc_cols
- vc
->vc_x
);
1052 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
+ 1, 0,
1053 vc
->vc_rows
- vc
->vc_y
- 1,
1057 case 1: /* erase from start to cursor */
1058 count
= ((vc
->vc_pos
- vc
->vc_origin
) >> 1) + 1;
1059 start
= (unsigned short *)vc
->vc_origin
;
1060 if (DO_UPDATE(vc
)) {
1061 /* do in two stages */
1062 vc
->vc_sw
->con_clear(vc
, 0, 0, vc
->vc_y
,
1064 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, 0, 1,
1068 case 2: /* erase whole display */
1069 count
= vc
->vc_cols
* vc
->vc_rows
;
1070 start
= (unsigned short *)vc
->vc_origin
;
1072 vc
->vc_sw
->con_clear(vc
, 0, 0,
1079 scr_memsetw(start
, vc
->vc_video_erase_char
, 2 * count
);
1080 vc
->vc_need_wrap
= 0;
1083 static void csi_K(struct vc_data
*vc
, int vpar
)
1086 unsigned short * start
;
1089 case 0: /* erase from cursor to end of line */
1090 count
= vc
->vc_cols
- vc
->vc_x
;
1091 start
= (unsigned short *)vc
->vc_pos
;
1093 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, vc
->vc_x
, 1,
1094 vc
->vc_cols
- vc
->vc_x
);
1096 case 1: /* erase from start of line to cursor */
1097 start
= (unsigned short *)(vc
->vc_pos
- (vc
->vc_x
<< 1));
1098 count
= vc
->vc_x
+ 1;
1100 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, 0, 1,
1103 case 2: /* erase whole line */
1104 start
= (unsigned short *)(vc
->vc_pos
- (vc
->vc_x
<< 1));
1105 count
= vc
->vc_cols
;
1107 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, 0, 1,
1113 scr_memsetw(start
, vc
->vc_video_erase_char
, 2 * count
);
1114 vc
->vc_need_wrap
= 0;
1117 static void csi_X(struct vc_data
*vc
, int vpar
) /* erase the following vpar positions */
1123 count
= (vpar
> vc
->vc_cols
- vc
->vc_x
) ? (vc
->vc_cols
- vc
->vc_x
) : vpar
;
1125 scr_memsetw((unsigned short *)vc
->vc_pos
, vc
->vc_video_erase_char
, 2 * count
);
1127 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, vc
->vc_x
, 1, count
);
1128 vc
->vc_need_wrap
= 0;
1131 static void default_attr(struct vc_data
*vc
)
1133 vc
->vc_intensity
= 1;
1134 vc
->vc_underline
= 0;
1137 vc
->vc_color
= vc
->vc_def_color
;
1140 /* console_sem is held */
1141 static void csi_m(struct vc_data
*vc
)
1145 for (i
= 0; i
<= vc
->vc_npar
; i
++)
1146 switch (vc
->vc_par
[i
]) {
1147 case 0: /* all attributes off */
1151 vc
->vc_intensity
= 2;
1154 vc
->vc_intensity
= 0;
1157 vc
->vc_underline
= 1;
1165 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1166 * Select primary font, don't display
1167 * control chars if defined, don't set
1170 vc
->vc_translate
= set_translate(vc
->vc_charset
== 0
1172 : vc
->vc_G1_charset
, vc
);
1173 vc
->vc_disp_ctrl
= 0;
1174 vc
->vc_toggle_meta
= 0;
1176 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1177 * Select first alternate font, lets
1178 * chars < 32 be displayed as ROM chars.
1180 vc
->vc_translate
= set_translate(IBMPC_MAP
, vc
);
1181 vc
->vc_disp_ctrl
= 1;
1182 vc
->vc_toggle_meta
= 0;
1184 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1185 * Select second alternate font, toggle
1186 * high bit before displaying as ROM char.
1188 vc
->vc_translate
= set_translate(IBMPC_MAP
, vc
);
1189 vc
->vc_disp_ctrl
= 1;
1190 vc
->vc_toggle_meta
= 1;
1194 vc
->vc_intensity
= 1;
1197 vc
->vc_underline
= 0;
1205 case 38: /* ANSI X3.64-1979 (SCO-ish?)
1206 * Enables underscore, white foreground
1207 * with white underscore (Linux - use
1208 * default foreground).
1210 vc
->vc_color
= (vc
->vc_def_color
& 0x0f) | (vc
->vc_color
& 0xf0);
1211 vc
->vc_underline
= 1;
1213 case 39: /* ANSI X3.64-1979 (SCO-ish?)
1214 * Disable underline option.
1215 * Reset colour to default? It did this
1218 vc
->vc_color
= (vc
->vc_def_color
& 0x0f) | (vc
->vc_color
& 0xf0);
1219 vc
->vc_underline
= 0;
1222 vc
->vc_color
= (vc
->vc_def_color
& 0xf0) | (vc
->vc_color
& 0x0f);
1225 if (vc
->vc_par
[i
] >= 30 && vc
->vc_par
[i
] <= 37)
1226 vc
->vc_color
= color_table
[vc
->vc_par
[i
] - 30]
1227 | (vc
->vc_color
& 0xf0);
1228 else if (vc
->vc_par
[i
] >= 40 && vc
->vc_par
[i
] <= 47)
1229 vc
->vc_color
= (color_table
[vc
->vc_par
[i
] - 40] << 4)
1230 | (vc
->vc_color
& 0x0f);
1236 static void respond_string(const char *p
, struct tty_struct
*tty
)
1239 tty_insert_flip_char(tty
, *p
, 0);
1242 con_schedule_flip(tty
);
1245 static void cursor_report(struct vc_data
*vc
, struct tty_struct
*tty
)
1249 sprintf(buf
, "\033[%d;%dR", vc
->vc_y
+ (vc
->vc_decom
? vc
->vc_top
+ 1 : 1), vc
->vc_x
+ 1);
1250 respond_string(buf
, tty
);
1253 static inline void status_report(struct tty_struct
*tty
)
1255 respond_string("\033[0n", tty
); /* Terminal ok */
1258 static inline void respond_ID(struct tty_struct
* tty
)
1260 respond_string(VT102ID
, tty
);
1263 void mouse_report(struct tty_struct
*tty
, int butt
, int mrx
, int mry
)
1267 sprintf(buf
, "\033[M%c%c%c", (char)(' ' + butt
), (char)('!' + mrx
),
1269 respond_string(buf
, tty
);
1272 /* invoked via ioctl(TIOCLINUX) and through set_selection */
1273 int mouse_reporting(void)
1275 return vc_cons
[fg_console
].d
->vc_report_mouse
;
1278 /* console_sem is held */
1279 static void set_mode(struct vc_data
*vc
, int on_off
)
1283 for (i
= 0; i
<= vc
->vc_npar
; i
++)
1285 switch(vc
->vc_par
[i
]) { /* DEC private modes set/reset */
1286 case 1: /* Cursor keys send ^[Ox/^[[x */
1288 set_kbd(vc
, decckm
);
1290 clr_kbd(vc
, decckm
);
1292 case 3: /* 80/132 mode switch unimplemented */
1293 vc
->vc_deccolm
= on_off
;
1295 vc_resize(deccolm
? 132 : 80, vc
->vc_rows
);
1296 /* this alone does not suffice; some user mode
1297 utility has to change the hardware regs */
1300 case 5: /* Inverted screen on/off */
1301 if (vc
->vc_decscnm
!= on_off
) {
1302 vc
->vc_decscnm
= on_off
;
1303 invert_screen(vc
, 0, vc
->vc_screenbuf_size
, 0);
1307 case 6: /* Origin relative/absolute */
1308 vc
->vc_decom
= on_off
;
1311 case 7: /* Autowrap on/off */
1312 vc
->vc_decawm
= on_off
;
1314 case 8: /* Autorepeat on/off */
1316 set_kbd(vc
, decarm
);
1318 clr_kbd(vc
, decarm
);
1321 vc
->vc_report_mouse
= on_off
? 1 : 0;
1323 case 25: /* Cursor on/off */
1324 vc
->vc_deccm
= on_off
;
1327 vc
->vc_report_mouse
= on_off
? 2 : 0;
1331 switch(vc
->vc_par
[i
]) { /* ANSI modes set/reset */
1332 case 3: /* Monitor (display ctrls) */
1333 vc
->vc_disp_ctrl
= on_off
;
1335 case 4: /* Insert Mode on/off */
1336 vc
->vc_decim
= on_off
;
1338 case 20: /* Lf, Enter == CrLf/Lf */
1348 /* console_sem is held */
1349 static void setterm_command(struct vc_data
*vc
)
1351 switch(vc
->vc_par
[0]) {
1352 case 1: /* set color for underline mode */
1353 if (vc
->vc_can_do_color
&&
1354 vc
->vc_par
[1] < 16) {
1355 vc
->vc_ulcolor
= color_table
[vc
->vc_par
[1]];
1356 if (vc
->vc_underline
)
1360 case 2: /* set color for half intensity mode */
1361 if (vc
->vc_can_do_color
&&
1362 vc
->vc_par
[1] < 16) {
1363 vc
->vc_halfcolor
= color_table
[vc
->vc_par
[1]];
1364 if (vc
->vc_intensity
== 0)
1368 case 8: /* store colors as defaults */
1369 vc
->vc_def_color
= vc
->vc_attr
;
1370 if (vc
->vc_hi_font_mask
== 0x100)
1371 vc
->vc_def_color
>>= 1;
1375 case 9: /* set blanking interval */
1376 blankinterval
= ((vc
->vc_par
[1] < 60) ? vc
->vc_par
[1] : 60) * 60 * HZ
;
1377 poke_blanked_console();
1379 case 10: /* set bell frequency in Hz */
1380 if (vc
->vc_npar
>= 1)
1381 vc
->vc_bell_pitch
= vc
->vc_par
[1];
1383 vc
->vc_bell_pitch
= DEFAULT_BELL_PITCH
;
1385 case 11: /* set bell duration in msec */
1386 if (vc
->vc_npar
>= 1)
1387 vc
->vc_bell_duration
= (vc
->vc_par
[1] < 2000) ?
1388 vc
->vc_par
[1] * HZ
/ 1000 : 0;
1390 vc
->vc_bell_duration
= DEFAULT_BELL_DURATION
;
1392 case 12: /* bring specified console to the front */
1393 if (vc
->vc_par
[1] >= 1 && vc_cons_allocated(vc
->vc_par
[1] - 1))
1394 set_console(vc
->vc_par
[1] - 1);
1396 case 13: /* unblank the screen */
1397 poke_blanked_console();
1399 case 14: /* set vesa powerdown interval */
1400 vesa_off_interval
= ((vc
->vc_par
[1] < 60) ? vc
->vc_par
[1] : 60) * 60 * HZ
;
1402 case 15: /* activate the previous console */
1403 set_console(last_console
);
1408 /* console_sem is held */
1409 static void csi_at(struct vc_data
*vc
, unsigned int nr
)
1411 if (nr
> vc
->vc_cols
- vc
->vc_x
)
1412 nr
= vc
->vc_cols
- vc
->vc_x
;
1415 insert_char(vc
, nr
);
1418 /* console_sem is held */
1419 static void csi_L(struct vc_data
*vc
, unsigned int nr
)
1421 if (nr
> vc
->vc_rows
- vc
->vc_y
)
1422 nr
= vc
->vc_rows
- vc
->vc_y
;
1425 scrdown(vc
, vc
->vc_y
, vc
->vc_bottom
, nr
);
1426 vc
->vc_need_wrap
= 0;
1429 /* console_sem is held */
1430 static void csi_P(struct vc_data
*vc
, unsigned int nr
)
1432 if (nr
> vc
->vc_cols
- vc
->vc_x
)
1433 nr
= vc
->vc_cols
- vc
->vc_x
;
1436 delete_char(vc
, nr
);
1439 /* console_sem is held */
1440 static void csi_M(struct vc_data
*vc
, unsigned int nr
)
1442 if (nr
> vc
->vc_rows
- vc
->vc_y
)
1443 nr
= vc
->vc_rows
- vc
->vc_y
;
1446 scrup(vc
, vc
->vc_y
, vc
->vc_bottom
, nr
);
1447 vc
->vc_need_wrap
= 0;
1450 /* console_sem is held (except via vc_init->reset_terminal */
1451 static void save_cur(struct vc_data
*vc
)
1453 vc
->vc_saved_x
= vc
->vc_x
;
1454 vc
->vc_saved_y
= vc
->vc_y
;
1455 vc
->vc_s_intensity
= vc
->vc_intensity
;
1456 vc
->vc_s_underline
= vc
->vc_underline
;
1457 vc
->vc_s_blink
= vc
->vc_blink
;
1458 vc
->vc_s_reverse
= vc
->vc_reverse
;
1459 vc
->vc_s_charset
= vc
->vc_charset
;
1460 vc
->vc_s_color
= vc
->vc_color
;
1461 vc
->vc_saved_G0
= vc
->vc_G0_charset
;
1462 vc
->vc_saved_G1
= vc
->vc_G1_charset
;
1465 /* console_sem is held */
1466 static void restore_cur(struct vc_data
*vc
)
1468 gotoxy(vc
, vc
->vc_saved_x
, vc
->vc_saved_y
);
1469 vc
->vc_intensity
= vc
->vc_s_intensity
;
1470 vc
->vc_underline
= vc
->vc_s_underline
;
1471 vc
->vc_blink
= vc
->vc_s_blink
;
1472 vc
->vc_reverse
= vc
->vc_s_reverse
;
1473 vc
->vc_charset
= vc
->vc_s_charset
;
1474 vc
->vc_color
= vc
->vc_s_color
;
1475 vc
->vc_G0_charset
= vc
->vc_saved_G0
;
1476 vc
->vc_G1_charset
= vc
->vc_saved_G1
;
1477 vc
->vc_translate
= set_translate(vc
->vc_charset
? vc
->vc_G1_charset
: vc
->vc_G0_charset
, vc
);
1479 vc
->vc_need_wrap
= 0;
1482 enum { ESnormal
, ESesc
, ESsquare
, ESgetpars
, ESgotpars
, ESfunckey
,
1483 EShash
, ESsetG0
, ESsetG1
, ESpercent
, ESignore
, ESnonstd
,
1486 /* console_sem is held (except via vc_init()) */
1487 static void reset_terminal(struct vc_data
*vc
, int do_clear
)
1490 vc
->vc_bottom
= vc
->vc_rows
;
1491 vc
->vc_state
= ESnormal
;
1493 vc
->vc_translate
= set_translate(LAT1_MAP
, vc
);
1494 vc
->vc_G0_charset
= LAT1_MAP
;
1495 vc
->vc_G1_charset
= GRAF_MAP
;
1497 vc
->vc_need_wrap
= 0;
1498 vc
->vc_report_mouse
= 0;
1500 vc
->vc_utf_count
= 0;
1502 vc
->vc_disp_ctrl
= 0;
1503 vc
->vc_toggle_meta
= 0;
1511 set_kbd(vc
, decarm
);
1512 clr_kbd(vc
, decckm
);
1513 clr_kbd(vc
, kbdapplic
);
1515 kbd_table
[vc
->vc_num
].lockstate
= 0;
1516 kbd_table
[vc
->vc_num
].slockstate
= 0;
1517 kbd_table
[vc
->vc_num
].ledmode
= LED_SHOW_FLAGS
;
1518 kbd_table
[vc
->vc_num
].ledflagstate
= kbd_table
[vc
->vc_num
].default_ledflagstate
;
1519 /* do not do set_leds here because this causes an endless tasklet loop
1520 when the keyboard hasn't been initialized yet */
1522 vc
->vc_cursor_type
= CUR_DEFAULT
;
1523 vc
->vc_complement_mask
= vc
->vc_s_complement_mask
;
1528 vc
->vc_tab_stop
[0] = 0x01010100;
1529 vc
->vc_tab_stop
[1] =
1530 vc
->vc_tab_stop
[2] =
1531 vc
->vc_tab_stop
[3] =
1532 vc
->vc_tab_stop
[4] = 0x01010101;
1534 vc
->vc_bell_pitch
= DEFAULT_BELL_PITCH
;
1535 vc
->vc_bell_duration
= DEFAULT_BELL_DURATION
;
1543 /* console_sem is held */
1544 static void do_con_trol(struct tty_struct
*tty
, struct vc_data
*vc
, int c
)
1547 * Control characters can be used in the _middle_
1548 * of an escape sequence.
1554 if (vc
->vc_bell_duration
)
1555 kd_mksound(vc
->vc_bell_pitch
, vc
->vc_bell_duration
);
1561 vc
->vc_pos
-= (vc
->vc_x
<< 1);
1562 while (vc
->vc_x
< vc
->vc_cols
- 1) {
1564 if (vc
->vc_tab_stop
[vc
->vc_x
>> 5] & (1 << (vc
->vc_x
& 31)))
1567 vc
->vc_pos
+= (vc
->vc_x
<< 1);
1569 case 10: case 11: case 12:
1571 if (!is_kbd(vc
, lnm
))
1578 vc
->vc_translate
= set_translate(vc
->vc_G1_charset
, vc
);
1579 vc
->vc_disp_ctrl
= 1;
1583 vc
->vc_translate
= set_translate(vc
->vc_G0_charset
, vc
);
1584 vc
->vc_disp_ctrl
= 0;
1587 vc
->vc_state
= ESnormal
;
1590 vc
->vc_state
= ESesc
;
1596 vc
->vc_state
= ESsquare
;
1599 switch(vc
->vc_state
) {
1601 vc
->vc_state
= ESnormal
;
1604 vc
->vc_state
= ESsquare
;
1607 vc
->vc_state
= ESnonstd
;
1610 vc
->vc_state
= ESpercent
;
1623 vc
->vc_tab_stop
[vc
->vc_x
>> 5] |= (1 << (vc
->vc_x
& 31));
1635 vc
->vc_state
= ESsetG0
;
1638 vc
->vc_state
= ESsetG1
;
1641 vc
->vc_state
= EShash
;
1644 reset_terminal(vc
, 1);
1646 case '>': /* Numeric keypad */
1647 clr_kbd(vc
, kbdapplic
);
1649 case '=': /* Appl. keypad */
1650 set_kbd(vc
, kbdapplic
);
1655 if (c
=='P') { /* palette escape sequence */
1656 for (vc
->vc_npar
= 0; vc
->vc_npar
< NPAR
; vc
->vc_npar
++)
1657 vc
->vc_par
[vc
->vc_npar
] = 0;
1659 vc
->vc_state
= ESpalette
;
1661 } else if (c
=='R') { /* reset palette */
1663 vc
->vc_state
= ESnormal
;
1665 vc
->vc_state
= ESnormal
;
1668 if ( (c
>='0'&&c
<='9') || (c
>='A'&&c
<='F') || (c
>='a'&&c
<='f') ) {
1669 vc
->vc_par
[vc
->vc_npar
++] = (c
> '9' ? (c
& 0xDF) - 'A' + 10 : c
- '0');
1670 if (vc
->vc_npar
== 7) {
1671 int i
= vc
->vc_par
[0] * 3, j
= 1;
1672 vc
->vc_palette
[i
] = 16 * vc
->vc_par
[j
++];
1673 vc
->vc_palette
[i
++] += vc
->vc_par
[j
++];
1674 vc
->vc_palette
[i
] = 16 * vc
->vc_par
[j
++];
1675 vc
->vc_palette
[i
++] += vc
->vc_par
[j
++];
1676 vc
->vc_palette
[i
] = 16 * vc
->vc_par
[j
++];
1677 vc
->vc_palette
[i
] += vc
->vc_par
[j
];
1679 vc
->vc_state
= ESnormal
;
1682 vc
->vc_state
= ESnormal
;
1685 for (vc
->vc_npar
= 0; vc
->vc_npar
< NPAR
; vc
->vc_npar
++)
1686 vc
->vc_par
[vc
->vc_npar
] = 0;
1688 vc
->vc_state
= ESgetpars
;
1689 if (c
== '[') { /* Function key */
1690 vc
->vc_state
=ESfunckey
;
1693 vc
->vc_ques
= (c
== '?');
1697 if (c
== ';' && vc
->vc_npar
< NPAR
- 1) {
1700 } else if (c
>='0' && c
<='9') {
1701 vc
->vc_par
[vc
->vc_npar
] *= 10;
1702 vc
->vc_par
[vc
->vc_npar
] += c
- '0';
1705 vc
->vc_state
= ESgotpars
;
1707 vc
->vc_state
= ESnormal
;
1718 vc
->vc_cursor_type
= vc
->vc_par
[0] | (vc
->vc_par
[1] << 8) | (vc
->vc_par
[2] << 16);
1720 vc
->vc_cursor_type
= CUR_DEFAULT
;
1728 vc
->vc_complement_mask
= vc
->vc_par
[0] << 8 | vc
->vc_par
[1];
1730 vc
->vc_complement_mask
= vc
->vc_s_complement_mask
;
1736 if (vc
->vc_par
[0] == 5)
1738 else if (vc
->vc_par
[0] == 6)
1739 cursor_report(vc
, tty
);
1751 gotoxy(vc
, vc
->vc_par
[0], vc
->vc_y
);
1756 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
- vc
->vc_par
[0]);
1761 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
+ vc
->vc_par
[0]);
1766 gotoxy(vc
, vc
->vc_x
+ vc
->vc_par
[0], vc
->vc_y
);
1771 gotoxy(vc
, vc
->vc_x
- vc
->vc_par
[0], vc
->vc_y
);
1776 gotoxy(vc
, 0, vc
->vc_y
+ vc
->vc_par
[0]);
1781 gotoxy(vc
, 0, vc
->vc_y
- vc
->vc_par
[0]);
1786 gotoxay(vc
, vc
->vc_x
,vc
->vc_par
[0]);
1793 gotoxay(vc
, vc
->vc_par
[1], vc
->vc_par
[0]);
1796 csi_J(vc
, vc
->vc_par
[0]);
1799 csi_K(vc
, vc
->vc_par
[0]);
1802 csi_L(vc
, vc
->vc_par
[0]);
1805 csi_M(vc
, vc
->vc_par
[0]);
1808 csi_P(vc
, vc
->vc_par
[0]);
1816 vc
->vc_tab_stop
[vc
->vc_x
>> 5] &= ~(1 << (vc
->vc_x
& 31));
1817 else if (vc
->vc_par
[0] == 3) {
1818 vc
->vc_tab_stop
[0] =
1819 vc
->vc_tab_stop
[1] =
1820 vc
->vc_tab_stop
[2] =
1821 vc
->vc_tab_stop
[3] =
1822 vc
->vc_tab_stop
[4] = 0;
1828 case 'q': /* DECLL - but only 3 leds */
1829 /* map 0,1,2,3 to 0,1,2,4 */
1830 if (vc
->vc_par
[0] < 4)
1831 setledstate(kbd_table
+ vc
->vc_num
,
1832 (vc
->vc_par
[0] < 3) ? vc
->vc_par
[0] : 4);
1838 vc
->vc_par
[1] = vc
->vc_rows
;
1839 /* Minimum allowed region is 2 lines */
1840 if (vc
->vc_par
[0] < vc
->vc_par
[1] &&
1841 vc
->vc_par
[1] <= vc
->vc_rows
) {
1842 vc
->vc_top
= vc
->vc_par
[0] - 1;
1843 vc
->vc_bottom
= vc
->vc_par
[1];
1854 csi_X(vc
, vc
->vc_par
[0]);
1857 csi_at(vc
, vc
->vc_par
[0]);
1859 case ']': /* setterm functions */
1860 setterm_command(vc
);
1865 vc
->vc_state
= ESnormal
;
1867 case '@': /* defined in ISO 2022 */
1870 case 'G': /* prelim official escape code */
1871 case '8': /* retained for compatibility */
1877 vc
->vc_state
= ESnormal
;
1880 vc
->vc_state
= ESnormal
;
1882 /* DEC screen alignment test. kludge :-) */
1883 vc
->vc_video_erase_char
=
1884 (vc
->vc_video_erase_char
& 0xff00) | 'E';
1886 vc
->vc_video_erase_char
=
1887 (vc
->vc_video_erase_char
& 0xff00) | ' ';
1888 do_update_region(vc
, vc
->vc_origin
, vc
->vc_screenbuf_size
/ 2);
1893 vc
->vc_G0_charset
= GRAF_MAP
;
1895 vc
->vc_G0_charset
= LAT1_MAP
;
1897 vc
->vc_G0_charset
= IBMPC_MAP
;
1899 vc
->vc_G0_charset
= USER_MAP
;
1900 if (vc
->vc_charset
== 0)
1901 vc
->vc_translate
= set_translate(vc
->vc_G0_charset
, vc
);
1902 vc
->vc_state
= ESnormal
;
1906 vc
->vc_G1_charset
= GRAF_MAP
;
1908 vc
->vc_G1_charset
= LAT1_MAP
;
1910 vc
->vc_G1_charset
= IBMPC_MAP
;
1912 vc
->vc_G1_charset
= USER_MAP
;
1913 if (vc
->vc_charset
== 1)
1914 vc
->vc_translate
= set_translate(vc
->vc_G1_charset
, vc
);
1915 vc
->vc_state
= ESnormal
;
1918 vc
->vc_state
= ESnormal
;
1922 /* This is a temporary buffer used to prepare a tty console write
1923 * so that we can easily avoid touching user space while holding the
1924 * console spinlock. It is allocated in con_init and is shared by
1925 * this code and the vc_screen read/write tty calls.
1927 * We have to allocate this statically in the kernel data section
1928 * since console_init (and thus con_init) are called before any
1929 * kernel memory allocation is available.
1931 char con_buf
[CON_BUF_SIZE
];
1932 DECLARE_MUTEX(con_buf_sem
);
1934 /* acquires console_sem */
1935 static int do_con_write(struct tty_struct
*tty
, const unsigned char *buf
, int count
)
1937 #ifdef VT_BUF_VRAM_ONLY
1938 #define FLUSH do { } while(0);
1940 #define FLUSH if (draw_x >= 0) { \
1941 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
1946 int c
, tc
, ok
, n
= 0, draw_x
= -1;
1947 unsigned int currcons
;
1948 unsigned long draw_from
= 0, draw_to
= 0;
1950 u16 himask
, charmask
;
1951 const unsigned char *orig_buf
= NULL
;
1959 acquire_console_sem();
1960 vc
= tty
->driver_data
;
1962 printk(KERN_ERR
"vt: argh, driver_data is NULL !\n");
1963 release_console_sem();
1967 currcons
= vc
->vc_num
;
1968 if (!vc_cons_allocated(currcons
)) {
1969 /* could this happen? */
1970 static int error
= 0;
1973 printk("con_write: tty %d not allocated\n", currcons
+1);
1975 release_console_sem();
1978 release_console_sem();
1983 /* At this point 'buf' is guaranteed to be a kernel buffer
1984 * and therefore no access to userspace (and therefore sleeping)
1985 * will be needed. The con_buf_sem serializes all tty based
1986 * console rendering and vcs write/read operations. We hold
1987 * the console spinlock during the entire write.
1990 acquire_console_sem();
1992 vc
= tty
->driver_data
;
1994 printk(KERN_ERR
"vt: argh, driver_data _became_ NULL !\n");
1995 release_console_sem();
1999 himask
= vc
->vc_hi_font_mask
;
2000 charmask
= himask
? 0x1ff : 0xff;
2002 /* undraw cursor first */
2006 while (!tty
->stopped
&& count
) {
2013 /* Do no translation at all in control states */
2014 if (vc
->vc_state
!= ESnormal
) {
2016 } else if (vc
->vc_utf
&& !vc
->vc_disp_ctrl
) {
2017 /* Combine UTF-8 into Unicode */
2018 /* Malformed sequences as sequences of replacement glyphs */
2021 if (vc
->vc_utf_count
) {
2022 if ((c
& 0xc0) == 0x80) {
2023 vc
->vc_utf_char
= (vc
->vc_utf_char
<< 6) | (c
& 0x3f);
2024 if (--vc
->vc_utf_count
) {
2028 tc
= c
= vc
->vc_utf_char
;
2030 goto replacement_glyph
;
2033 if ((c
& 0xe0) == 0xc0) {
2034 vc
->vc_utf_count
= 1;
2035 vc
->vc_utf_char
= (c
& 0x1f);
2036 } else if ((c
& 0xf0) == 0xe0) {
2037 vc
->vc_utf_count
= 2;
2038 vc
->vc_utf_char
= (c
& 0x0f);
2039 } else if ((c
& 0xf8) == 0xf0) {
2040 vc
->vc_utf_count
= 3;
2041 vc
->vc_utf_char
= (c
& 0x07);
2042 } else if ((c
& 0xfc) == 0xf8) {
2043 vc
->vc_utf_count
= 4;
2044 vc
->vc_utf_char
= (c
& 0x03);
2045 } else if ((c
& 0xfe) == 0xfc) {
2046 vc
->vc_utf_count
= 5;
2047 vc
->vc_utf_char
= (c
& 0x01);
2049 goto replacement_glyph
;
2053 if (vc
->vc_utf_count
)
2054 goto replacement_glyph
;
2057 } else { /* no utf or alternate charset mode */
2058 tc
= vc
->vc_translate
[vc
->vc_toggle_meta
? (c
| 0x80) : c
];
2061 /* If the original code was a control character we
2062 * only allow a glyph to be displayed if the code is
2063 * not normally used (such as for cursor movement) or
2064 * if the disp_ctrl mode has been explicitly enabled.
2065 * Certain characters (as given by the CTRL_ALWAYS
2066 * bitmap) are always displayed as control characters,
2067 * as the console would be pretty useless without
2068 * them; to display an arbitrary font position use the
2069 * direct-to-font zone in UTF-8 mode.
2071 ok
= tc
&& (c
>= 32 ||
2072 !(vc
->vc_disp_ctrl
? (CTRL_ALWAYS
>> c
) & 1 :
2073 vc
->vc_utf
|| ((CTRL_ACTION
>> c
) & 1)))
2074 && (c
!= 127 || vc
->vc_disp_ctrl
)
2077 if (vc
->vc_state
== ESnormal
&& ok
) {
2078 /* Now try to find out how to display it */
2079 tc
= conv_uni_to_pc(vc
, tc
);
2080 if (tc
& ~charmask
) {
2082 /* If we got -4 (not found) then see if we have
2083 defined a replacement character (U+FFFD) */
2085 tc
= conv_uni_to_pc(vc
, 0xfffd);
2086 if (!(tc
& ~charmask
))
2088 } else if ( tc
!= -3 )
2089 continue; /* nothing to display */
2090 /* no hash table or no replacement --
2091 * hope for the best */
2092 if ( c
& ~charmask
)
2099 if (vc
->vc_need_wrap
|| vc
->vc_decim
)
2101 if (vc
->vc_need_wrap
) {
2108 ((vc
->vc_attr
<< 8) & ~himask
) + ((tc
& 0x100) ? himask
: 0) + (tc
& 0xff) :
2109 (vc
->vc_attr
<< 8) + tc
,
2110 (u16
*) vc
->vc_pos
);
2111 if (DO_UPDATE(vc
) && draw_x
< 0) {
2113 draw_from
= vc
->vc_pos
;
2115 if (vc
->vc_x
== vc
->vc_cols
- 1) {
2116 vc
->vc_need_wrap
= vc
->vc_decawm
;
2117 draw_to
= vc
->vc_pos
+ 2;
2120 draw_to
= (vc
->vc_pos
+= 2);
2122 if (vc
->vc_utf_count
) {
2127 vc
->vc_utf_count
= 0;
2129 goto rescan_last_byte
;
2134 do_con_trol(tty
, vc
, orig
);
2137 console_conditional_schedule();
2138 release_console_sem();
2146 * This is the console switching callback.
2148 * Doing console switching in a process context allows
2149 * us to do the switches asynchronously (needed when we want
2150 * to switch due to a keyboard interrupt). Synchronization
2151 * with other console code and prevention of re-entrancy is
2152 * ensured with console_sem.
2154 static void console_callback(struct work_struct
*ignored
)
2156 acquire_console_sem();
2158 if (want_console
>= 0) {
2159 if (want_console
!= fg_console
&&
2160 vc_cons_allocated(want_console
)) {
2161 hide_cursor(vc_cons
[fg_console
].d
);
2162 change_console(vc_cons
[want_console
].d
);
2163 /* we only changed when the console had already
2164 been allocated - a new console is not created
2165 in an interrupt routine */
2169 if (do_poke_blanked_console
) { /* do not unblank for a LED change */
2170 do_poke_blanked_console
= 0;
2171 poke_blanked_console();
2173 if (scrollback_delta
) {
2174 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
2176 if (vc
->vc_mode
== KD_TEXT
)
2177 vc
->vc_sw
->con_scrolldelta(vc
, scrollback_delta
);
2178 scrollback_delta
= 0;
2180 if (blank_timer_expired
) {
2182 blank_timer_expired
= 0;
2185 release_console_sem();
2188 void set_console(int nr
)
2191 schedule_console_callback();
2194 struct tty_driver
*console_driver
;
2196 #ifdef CONFIG_VT_CONSOLE
2199 * Console on virtual terminal
2201 * The console must be locked when we get here.
2204 static void vt_console_print(struct console
*co
, const char *b
, unsigned count
)
2206 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
2208 static unsigned long printing
;
2209 const ushort
*start
;
2213 /* console busy or not yet initialized */
2214 if (!printable
|| test_and_set_bit(0, &printing
))
2217 if (kmsg_redirect
&& vc_cons_allocated(kmsg_redirect
- 1))
2218 vc
= vc_cons
[kmsg_redirect
- 1].d
;
2220 /* read `x' only after setting currcons properly (otherwise
2221 the `x' macro will read the x of the foreground console). */
2224 if (!vc_cons_allocated(fg_console
)) {
2226 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2230 if (vc
->vc_mode
!= KD_TEXT
)
2233 /* undraw cursor first */
2237 start
= (ushort
*)vc
->vc_pos
;
2239 /* Contrived structure to try to emulate original need_wrap behaviour
2240 * Problems caused when we have need_wrap set on '\n' character */
2243 if (c
== 10 || c
== 13 || c
== 8 || vc
->vc_need_wrap
) {
2245 if (CON_IS_VISIBLE(vc
))
2246 vc
->vc_sw
->con_putcs(vc
, start
, cnt
, vc
->vc_y
, vc
->vc_x
);
2248 if (vc
->vc_need_wrap
)
2252 if (c
== 8) { /* backspace */
2254 start
= (ushort
*)vc
->vc_pos
;
2261 start
= (ushort
*)vc
->vc_pos
;
2263 if (c
== 10 || c
== 13)
2266 scr_writew((vc
->vc_attr
<< 8) + c
, (unsigned short *)vc
->vc_pos
);
2268 if (myx
== vc
->vc_cols
- 1) {
2269 vc
->vc_need_wrap
= 1;
2276 if (CON_IS_VISIBLE(vc
))
2277 vc
->vc_sw
->con_putcs(vc
, start
, cnt
, vc
->vc_y
, vc
->vc_x
);
2279 if (vc
->vc_x
== vc
->vc_cols
) {
2281 vc
->vc_need_wrap
= 1;
2287 clear_bit(0, &printing
);
2290 static struct tty_driver
*vt_console_device(struct console
*c
, int *index
)
2292 *index
= c
->index
? c
->index
-1 : fg_console
;
2293 return console_driver
;
2296 static struct console vt_console_driver
= {
2298 .write
= vt_console_print
,
2299 .device
= vt_console_device
,
2300 .unblank
= unblank_screen
,
2301 .flags
= CON_PRINTBUFFER
,
2307 * Handling of Linux-specific VC ioctls
2311 * Generally a bit racy with respect to console_sem().
2313 * There are some functions which don't need it.
2315 * There are some functions which can sleep for arbitrary periods
2316 * (paste_selection) but we don't need the lock there anyway.
2318 * set_selection has locking, and definitely needs it
2321 int tioclinux(struct tty_struct
*tty
, unsigned long arg
)
2324 char __user
*p
= (char __user
*)arg
;
2328 if (tty
->driver
->type
!= TTY_DRIVER_TYPE_CONSOLE
)
2330 if (current
->signal
->tty
!= tty
&& !capable(CAP_SYS_ADMIN
))
2332 if (get_user(type
, p
))
2338 acquire_console_sem();
2339 ret
= set_selection((struct tiocl_selection __user
*)(p
+1), tty
);
2340 release_console_sem();
2342 case TIOCL_PASTESEL
:
2343 ret
= paste_selection(tty
);
2345 case TIOCL_UNBLANKSCREEN
:
2346 acquire_console_sem();
2348 release_console_sem();
2350 case TIOCL_SELLOADLUT
:
2351 ret
= sel_loadlut(p
);
2353 case TIOCL_GETSHIFTSTATE
:
2356 * Make it possible to react to Shift+Mousebutton.
2357 * Note that 'shift_state' is an undocumented
2358 * kernel-internal variable; programs not closely
2359 * related to the kernel should not use this.
2362 ret
= __put_user(data
, p
);
2364 case TIOCL_GETMOUSEREPORTING
:
2365 data
= mouse_reporting();
2366 ret
= __put_user(data
, p
);
2368 case TIOCL_SETVESABLANK
:
2369 ret
= set_vesa_blanking(p
);
2371 case TIOCL_GETKMSGREDIRECT
:
2372 data
= kmsg_redirect
;
2373 ret
= __put_user(data
, p
);
2375 case TIOCL_SETKMSGREDIRECT
:
2376 if (!capable(CAP_SYS_ADMIN
)) {
2379 if (get_user(data
, p
+1))
2382 kmsg_redirect
= data
;
2385 case TIOCL_GETFGCONSOLE
:
2388 case TIOCL_SCROLLCONSOLE
:
2389 if (get_user(lines
, (s32 __user
*)(p
+4))) {
2392 scrollfront(vc_cons
[fg_console
].d
, lines
);
2396 case TIOCL_BLANKSCREEN
: /* until explicitly unblanked, not only poked */
2397 acquire_console_sem();
2400 release_console_sem();
2402 case TIOCL_BLANKEDSCREEN
:
2403 ret
= console_blanked
;
2413 * /dev/ttyN handling
2416 static int con_write(struct tty_struct
*tty
, const unsigned char *buf
, int count
)
2420 retval
= do_con_write(tty
, buf
, count
);
2421 con_flush_chars(tty
);
2426 static void con_put_char(struct tty_struct
*tty
, unsigned char ch
)
2429 return; /* n_r3964 calls put_char() from interrupt context */
2430 do_con_write(tty
, &ch
, 1);
2433 static int con_write_room(struct tty_struct
*tty
)
2437 return 4096; /* No limit, really; we're not buffering */
2440 static int con_chars_in_buffer(struct tty_struct
*tty
)
2442 return 0; /* we're not buffering */
2446 * con_throttle and con_unthrottle are only used for
2447 * paste_selection(), which has to stuff in a large number of
2450 static void con_throttle(struct tty_struct
*tty
)
2454 static void con_unthrottle(struct tty_struct
*tty
)
2456 struct vc_data
*vc
= tty
->driver_data
;
2458 wake_up_interruptible(&vc
->paste_wait
);
2462 * Turn the Scroll-Lock LED on when the tty is stopped
2464 static void con_stop(struct tty_struct
*tty
)
2469 console_num
= tty
->index
;
2470 if (!vc_cons_allocated(console_num
))
2472 set_vc_kbd_led(kbd_table
+ console_num
, VC_SCROLLOCK
);
2477 * Turn the Scroll-Lock LED off when the console is started
2479 static void con_start(struct tty_struct
*tty
)
2484 console_num
= tty
->index
;
2485 if (!vc_cons_allocated(console_num
))
2487 clr_vc_kbd_led(kbd_table
+ console_num
, VC_SCROLLOCK
);
2491 static void con_flush_chars(struct tty_struct
*tty
)
2495 if (in_interrupt()) /* from flush_to_ldisc */
2498 /* if we race with con_close(), vt may be null */
2499 acquire_console_sem();
2500 vc
= tty
->driver_data
;
2503 release_console_sem();
2507 * Allocate the console screen memory.
2509 static int con_open(struct tty_struct
*tty
, struct file
*filp
)
2511 unsigned int currcons
= tty
->index
;
2514 acquire_console_sem();
2515 if (tty
->driver_data
== NULL
) {
2516 ret
= vc_allocate(currcons
);
2518 struct vc_data
*vc
= vc_cons
[currcons
].d
;
2519 tty
->driver_data
= vc
;
2522 if (!tty
->winsize
.ws_row
&& !tty
->winsize
.ws_col
) {
2523 tty
->winsize
.ws_row
= vc_cons
[currcons
].d
->vc_rows
;
2524 tty
->winsize
.ws_col
= vc_cons
[currcons
].d
->vc_cols
;
2526 release_console_sem();
2527 vcs_make_sysfs(tty
);
2531 release_console_sem();
2536 * We take tty_mutex in here to prevent another thread from coming in via init_dev
2537 * and taking a ref against the tty while we're in the process of forgetting
2538 * about it and cleaning things up.
2540 * This is because vcs_remove_sysfs() can sleep and will drop the BKL.
2542 static void con_close(struct tty_struct
*tty
, struct file
*filp
)
2544 mutex_lock(&tty_mutex
);
2545 acquire_console_sem();
2546 if (tty
&& tty
->count
== 1) {
2547 struct vc_data
*vc
= tty
->driver_data
;
2551 tty
->driver_data
= NULL
;
2552 release_console_sem();
2553 vcs_remove_sysfs(tty
);
2554 mutex_unlock(&tty_mutex
);
2556 * tty_mutex is released, but we still hold BKL, so there is
2557 * still exclusion against init_dev()
2561 release_console_sem();
2562 mutex_unlock(&tty_mutex
);
2565 static void vc_init(struct vc_data
*vc
, unsigned int rows
,
2566 unsigned int cols
, int do_clear
)
2572 vc
->vc_size_row
= cols
<< 1;
2573 vc
->vc_screenbuf_size
= vc
->vc_rows
* vc
->vc_size_row
;
2576 vc
->vc_pos
= vc
->vc_origin
;
2578 for (j
=k
=0; j
<16; j
++) {
2579 vc
->vc_palette
[k
++] = default_red
[j
] ;
2580 vc
->vc_palette
[k
++] = default_grn
[j
] ;
2581 vc
->vc_palette
[k
++] = default_blu
[j
] ;
2583 vc
->vc_def_color
= 0x07; /* white */
2584 vc
->vc_ulcolor
= 0x0f; /* bold white */
2585 vc
->vc_halfcolor
= 0x08; /* grey */
2586 init_waitqueue_head(&vc
->paste_wait
);
2587 reset_terminal(vc
, do_clear
);
2591 * This routine initializes console interrupts, and does nothing
2592 * else. If you want the screen to clear, call tty_write with
2593 * the appropriate escape-sequence.
2596 static int __init
con_init(void)
2598 const char *display_desc
= NULL
;
2600 unsigned int currcons
= 0, i
;
2602 acquire_console_sem();
2605 display_desc
= conswitchp
->con_startup();
2606 if (!display_desc
) {
2608 release_console_sem();
2612 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
2613 struct con_driver
*con_driver
= ®istered_con_driver
[i
];
2615 if (con_driver
->con
== NULL
) {
2616 con_driver
->con
= conswitchp
;
2617 con_driver
->desc
= display_desc
;
2618 con_driver
->flag
= CON_DRIVER_FLAG_INIT
;
2619 con_driver
->first
= 0;
2620 con_driver
->last
= MAX_NR_CONSOLES
- 1;
2625 for (i
= 0; i
< MAX_NR_CONSOLES
; i
++)
2626 con_driver_map
[i
] = conswitchp
;
2628 if (blankinterval
) {
2629 blank_state
= blank_normal_wait
;
2630 mod_timer(&console_timer
, jiffies
+ blankinterval
);
2634 * kmalloc is not running yet - we use the bootmem allocator.
2636 for (currcons
= 0; currcons
< MIN_NR_CONSOLES
; currcons
++) {
2637 vc_cons
[currcons
].d
= vc
= alloc_bootmem(sizeof(struct vc_data
));
2638 INIT_WORK(&vc_cons
[currcons
].SAK_work
, vc_SAK
);
2639 visual_init(vc
, currcons
, 1);
2640 vc
->vc_screenbuf
= (unsigned short *)alloc_bootmem(vc
->vc_screenbuf_size
);
2641 vc
->vc_kmalloced
= 0;
2642 vc_init(vc
, vc
->vc_rows
, vc
->vc_cols
,
2643 currcons
|| !vc
->vc_sw
->con_save_screen
);
2645 currcons
= fg_console
= 0;
2646 master_display_fg
= vc
= vc_cons
[currcons
].d
;
2649 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
);
2652 printk("Console: %s %s %dx%d",
2653 vc
->vc_can_do_color
? "colour" : "mono",
2654 display_desc
, vc
->vc_cols
, vc
->vc_rows
);
2658 release_console_sem();
2660 #ifdef CONFIG_VT_CONSOLE
2661 register_console(&vt_console_driver
);
2665 console_initcall(con_init
);
2667 static const struct tty_operations con_ops
= {
2671 .write_room
= con_write_room
,
2672 .put_char
= con_put_char
,
2673 .flush_chars
= con_flush_chars
,
2674 .chars_in_buffer
= con_chars_in_buffer
,
2678 .throttle
= con_throttle
,
2679 .unthrottle
= con_unthrottle
,
2682 int __init
vty_init(void)
2686 console_driver
= alloc_tty_driver(MAX_NR_CONSOLES
);
2687 if (!console_driver
)
2688 panic("Couldn't allocate console driver\n");
2689 console_driver
->owner
= THIS_MODULE
;
2690 console_driver
->name
= "tty";
2691 console_driver
->name_base
= 1;
2692 console_driver
->major
= TTY_MAJOR
;
2693 console_driver
->minor_start
= 1;
2694 console_driver
->type
= TTY_DRIVER_TYPE_CONSOLE
;
2695 console_driver
->init_termios
= tty_std_termios
;
2696 console_driver
->flags
= TTY_DRIVER_REAL_RAW
| TTY_DRIVER_RESET_TERMIOS
;
2697 tty_set_operations(console_driver
, &con_ops
);
2698 if (tty_register_driver(console_driver
))
2699 panic("Couldn't register console driver\n");
2703 #ifdef CONFIG_PROM_CONSOLE
2706 #ifdef CONFIG_MDA_CONSOLE
2712 #ifndef VT_SINGLE_DRIVER
2713 #include <linux/device.h>
2715 static struct class *vtconsole_class
;
2717 static int bind_con_driver(const struct consw
*csw
, int first
, int last
,
2720 struct module
*owner
= csw
->owner
;
2721 const char *desc
= NULL
;
2722 struct con_driver
*con_driver
;
2723 int i
, j
= -1, k
= -1, retval
= -ENODEV
;
2725 if (!try_module_get(owner
))
2728 acquire_console_sem();
2730 /* check if driver is registered */
2731 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
2732 con_driver
= ®istered_con_driver
[i
];
2734 if (con_driver
->con
== csw
) {
2735 desc
= con_driver
->desc
;
2744 if (!(con_driver
->flag
& CON_DRIVER_FLAG_INIT
)) {
2746 con_driver
->flag
|= CON_DRIVER_FLAG_INIT
;
2751 module_put(conswitchp
->owner
);
2753 __module_get(owner
);
2757 first
= max(first
, con_driver
->first
);
2758 last
= min(last
, con_driver
->last
);
2760 for (i
= first
; i
<= last
; i
++) {
2762 struct vc_data
*vc
= vc_cons
[i
].d
;
2764 if (con_driver_map
[i
])
2765 module_put(con_driver_map
[i
]->owner
);
2766 __module_get(owner
);
2767 con_driver_map
[i
] = csw
;
2769 if (!vc
|| !vc
->vc_sw
)
2774 if (CON_IS_VISIBLE(vc
)) {
2779 old_was_color
= vc
->vc_can_do_color
;
2780 vc
->vc_sw
->con_deinit(vc
);
2781 vc
->vc_origin
= (unsigned long)vc
->vc_screenbuf
;
2782 visual_init(vc
, i
, 0);
2786 /* If the console changed between mono <-> color, then
2787 * the attributes in the screenbuf will be wrong. The
2788 * following resets all attributes to something sane.
2790 if (old_was_color
!= vc
->vc_can_do_color
)
2791 clear_buffer_attributes(vc
);
2794 printk("Console: switching ");
2796 printk("consoles %d-%d ", first
+1, last
+1);
2798 struct vc_data
*vc
= vc_cons
[j
].d
;
2800 printk("to %s %s %dx%d\n",
2801 vc
->vc_can_do_color
? "colour" : "mono",
2802 desc
, vc
->vc_cols
, vc
->vc_rows
);
2809 printk("to %s\n", desc
);
2813 release_console_sem();
2818 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
2819 static int con_is_graphics(const struct consw
*csw
, int first
, int last
)
2823 for (i
= first
; i
<= last
; i
++) {
2824 struct vc_data
*vc
= vc_cons
[i
].d
;
2826 if (vc
&& vc
->vc_mode
== KD_GRAPHICS
) {
2835 static int unbind_con_driver(const struct consw
*csw
, int first
, int last
,
2838 struct module
*owner
= csw
->owner
;
2839 const struct consw
*defcsw
= NULL
;
2840 struct con_driver
*con_driver
= NULL
, *con_back
= NULL
;
2841 int i
, retval
= -ENODEV
;
2843 if (!try_module_get(owner
))
2846 acquire_console_sem();
2848 /* check if driver is registered and if it is unbindable */
2849 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
2850 con_driver
= ®istered_con_driver
[i
];
2852 if (con_driver
->con
== csw
&&
2853 con_driver
->flag
& CON_DRIVER_FLAG_MODULE
) {
2860 release_console_sem();
2866 /* check if backup driver exists */
2867 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
2868 con_back
= ®istered_con_driver
[i
];
2870 if (con_back
->con
&&
2871 !(con_back
->flag
& CON_DRIVER_FLAG_MODULE
)) {
2872 defcsw
= con_back
->con
;
2879 release_console_sem();
2883 if (!con_is_bound(csw
)) {
2884 release_console_sem();
2888 first
= max(first
, con_driver
->first
);
2889 last
= min(last
, con_driver
->last
);
2891 for (i
= first
; i
<= last
; i
++) {
2892 if (con_driver_map
[i
] == csw
) {
2893 module_put(csw
->owner
);
2894 con_driver_map
[i
] = NULL
;
2898 if (!con_is_bound(defcsw
)) {
2899 const struct consw
*defconsw
= conswitchp
;
2901 defcsw
->con_startup();
2902 con_back
->flag
|= CON_DRIVER_FLAG_INIT
;
2904 * vgacon may change the default driver to point
2905 * to dummycon, we restore it here...
2907 conswitchp
= defconsw
;
2910 if (!con_is_bound(csw
))
2911 con_driver
->flag
&= ~CON_DRIVER_FLAG_INIT
;
2913 release_console_sem();
2914 /* ignore return value, binding should not fail */
2915 bind_con_driver(defcsw
, first
, last
, deflt
);
2922 static int vt_bind(struct con_driver
*con
)
2924 const struct consw
*defcsw
= NULL
, *csw
= NULL
;
2925 int i
, more
= 1, first
= -1, last
= -1, deflt
= 0;
2927 if (!con
->con
|| !(con
->flag
& CON_DRIVER_FLAG_MODULE
) ||
2928 con_is_graphics(con
->con
, con
->first
, con
->last
))
2933 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
2934 struct con_driver
*con
= ®istered_con_driver
[i
];
2936 if (con
->con
&& !(con
->flag
& CON_DRIVER_FLAG_MODULE
)) {
2948 for (i
= con
->first
; i
<= con
->last
; i
++) {
2949 if (con_driver_map
[i
] == defcsw
) {
2954 } else if (first
!= -1)
2958 if (first
== 0 && last
== MAX_NR_CONSOLES
-1)
2962 bind_con_driver(csw
, first
, last
, deflt
);
2973 static int vt_unbind(struct con_driver
*con
)
2975 const struct consw
*csw
= NULL
;
2976 int i
, more
= 1, first
= -1, last
= -1, deflt
= 0;
2978 if (!con
->con
|| !(con
->flag
& CON_DRIVER_FLAG_MODULE
) ||
2979 con_is_graphics(con
->con
, con
->first
, con
->last
))
2987 for (i
= con
->first
; i
<= con
->last
; i
++) {
2988 if (con_driver_map
[i
] == csw
) {
2993 } else if (first
!= -1)
2997 if (first
== 0 && last
== MAX_NR_CONSOLES
-1)
3001 unbind_con_driver(csw
, first
, last
, deflt
);
3012 static inline int vt_bind(struct con_driver
*con
)
3016 static inline int vt_unbind(struct con_driver
*con
)
3020 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3022 static ssize_t
store_bind(struct device
*dev
, struct device_attribute
*attr
,
3023 const char *buf
, size_t count
)
3025 struct con_driver
*con
= dev_get_drvdata(dev
);
3026 int bind
= simple_strtoul(buf
, NULL
, 0);
3036 static ssize_t
show_bind(struct device
*dev
, struct device_attribute
*attr
,
3039 struct con_driver
*con
= dev_get_drvdata(dev
);
3040 int bind
= con_is_bound(con
->con
);
3042 return snprintf(buf
, PAGE_SIZE
, "%i\n", bind
);
3045 static ssize_t
show_name(struct device
*dev
, struct device_attribute
*attr
,
3048 struct con_driver
*con
= dev_get_drvdata(dev
);
3050 return snprintf(buf
, PAGE_SIZE
, "%s %s\n",
3051 (con
->flag
& CON_DRIVER_FLAG_MODULE
) ? "(M)" : "(S)",
3056 static struct device_attribute device_attrs
[] = {
3057 __ATTR(bind
, S_IRUGO
|S_IWUSR
, show_bind
, store_bind
),
3058 __ATTR(name
, S_IRUGO
, show_name
, NULL
),
3061 static int vtconsole_init_device(struct con_driver
*con
)
3066 con
->flag
|= CON_DRIVER_FLAG_ATTR
;
3067 dev_set_drvdata(con
->dev
, con
);
3068 for (i
= 0; i
< ARRAY_SIZE(device_attrs
); i
++) {
3069 error
= device_create_file(con
->dev
, &device_attrs
[i
]);
3076 device_remove_file(con
->dev
, &device_attrs
[i
]);
3077 con
->flag
&= ~CON_DRIVER_FLAG_ATTR
;
3083 static void vtconsole_deinit_device(struct con_driver
*con
)
3087 if (con
->flag
& CON_DRIVER_FLAG_ATTR
) {
3088 for (i
= 0; i
< ARRAY_SIZE(device_attrs
); i
++)
3089 device_remove_file(con
->dev
, &device_attrs
[i
]);
3090 con
->flag
&= ~CON_DRIVER_FLAG_ATTR
;
3095 * con_is_bound - checks if driver is bound to the console
3096 * @csw: console driver
3098 * RETURNS: zero if unbound, nonzero if bound
3100 * Drivers can call this and if zero, they should release
3101 * all resources allocated on con_startup()
3103 int con_is_bound(const struct consw
*csw
)
3107 for (i
= 0; i
< MAX_NR_CONSOLES
; i
++) {
3108 if (con_driver_map
[i
] == csw
) {
3116 EXPORT_SYMBOL(con_is_bound
);
3119 * register_con_driver - register console driver to console layer
3120 * @csw: console driver
3121 * @first: the first console to take over, minimum value is 0
3122 * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1
3124 * DESCRIPTION: This function registers a console driver which can later
3125 * bind to a range of consoles specified by @first and @last. It will
3126 * also initialize the console driver by calling con_startup().
3128 int register_con_driver(const struct consw
*csw
, int first
, int last
)
3130 struct module
*owner
= csw
->owner
;
3131 struct con_driver
*con_driver
;
3135 if (!try_module_get(owner
))
3138 acquire_console_sem();
3140 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3141 con_driver
= ®istered_con_driver
[i
];
3143 /* already registered */
3144 if (con_driver
->con
== csw
)
3151 desc
= csw
->con_startup();
3158 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3159 con_driver
= ®istered_con_driver
[i
];
3161 if (con_driver
->con
== NULL
) {
3162 con_driver
->con
= csw
;
3163 con_driver
->desc
= desc
;
3164 con_driver
->node
= i
;
3165 con_driver
->flag
= CON_DRIVER_FLAG_MODULE
|
3166 CON_DRIVER_FLAG_INIT
;
3167 con_driver
->first
= first
;
3168 con_driver
->last
= last
;
3177 con_driver
->dev
= device_create(vtconsole_class
, NULL
,
3178 MKDEV(0, con_driver
->node
),
3179 "vtcon%i", con_driver
->node
);
3181 if (IS_ERR(con_driver
->dev
)) {
3182 printk(KERN_WARNING
"Unable to create device for %s; "
3183 "errno = %ld\n", con_driver
->desc
,
3184 PTR_ERR(con_driver
->dev
));
3185 con_driver
->dev
= NULL
;
3187 vtconsole_init_device(con_driver
);
3191 release_console_sem();
3195 EXPORT_SYMBOL(register_con_driver
);
3198 * unregister_con_driver - unregister console driver from console layer
3199 * @csw: console driver
3201 * DESCRIPTION: All drivers that registers to the console layer must
3202 * call this function upon exit, or if the console driver is in a state
3203 * where it won't be able to handle console services, such as the
3204 * framebuffer console without loaded framebuffer drivers.
3206 * The driver must unbind first prior to unregistration.
3208 int unregister_con_driver(const struct consw
*csw
)
3210 int i
, retval
= -ENODEV
;
3212 acquire_console_sem();
3214 /* cannot unregister a bound driver */
3215 if (con_is_bound(csw
))
3218 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3219 struct con_driver
*con_driver
= ®istered_con_driver
[i
];
3221 if (con_driver
->con
== csw
&&
3222 con_driver
->flag
& CON_DRIVER_FLAG_MODULE
) {
3223 vtconsole_deinit_device(con_driver
);
3224 device_destroy(vtconsole_class
,
3225 MKDEV(0, con_driver
->node
));
3226 con_driver
->con
= NULL
;
3227 con_driver
->desc
= NULL
;
3228 con_driver
->dev
= NULL
;
3229 con_driver
->node
= 0;
3230 con_driver
->flag
= 0;
3231 con_driver
->first
= 0;
3232 con_driver
->last
= 0;
3238 release_console_sem();
3241 EXPORT_SYMBOL(unregister_con_driver
);
3244 * If we support more console drivers, this function is used
3245 * when a driver wants to take over some existing consoles
3246 * and become default driver for newly opened ones.
3248 * take_over_console is basically a register followed by unbind
3250 int take_over_console(const struct consw
*csw
, int first
, int last
, int deflt
)
3254 err
= register_con_driver(csw
, first
, last
);
3257 bind_con_driver(csw
, first
, last
, deflt
);
3263 * give_up_console is a wrapper to unregister_con_driver. It will only
3264 * work if driver is fully unbound.
3266 void give_up_console(const struct consw
*csw
)
3268 unregister_con_driver(csw
);
3271 static int __init
vtconsole_class_init(void)
3275 vtconsole_class
= class_create(THIS_MODULE
, "vtconsole");
3276 if (IS_ERR(vtconsole_class
)) {
3277 printk(KERN_WARNING
"Unable to create vt console class; "
3278 "errno = %ld\n", PTR_ERR(vtconsole_class
));
3279 vtconsole_class
= NULL
;
3282 /* Add system drivers to sysfs */
3283 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3284 struct con_driver
*con
= ®istered_con_driver
[i
];
3286 if (con
->con
&& !con
->dev
) {
3287 con
->dev
= device_create(vtconsole_class
, NULL
,
3288 MKDEV(0, con
->node
),
3289 "vtcon%i", con
->node
);
3291 if (IS_ERR(con
->dev
)) {
3292 printk(KERN_WARNING
"Unable to create "
3293 "device for %s; errno = %ld\n",
3294 con
->desc
, PTR_ERR(con
->dev
));
3297 vtconsole_init_device(con
);
3304 postcore_initcall(vtconsole_class_init
);
3312 static int set_vesa_blanking(char __user
*p
)
3316 if (get_user(mode
, p
+ 1))
3319 vesa_blank_mode
= (mode
< 4) ? mode
: 0;
3323 void do_blank_screen(int entering_gfx
)
3325 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
3328 WARN_CONSOLE_UNLOCKED();
3330 if (console_blanked
) {
3331 if (blank_state
== blank_vesa_wait
) {
3332 blank_state
= blank_off
;
3333 vc
->vc_sw
->con_blank(vc
, vesa_blank_mode
+ 1, 0);
3337 if (blank_state
!= blank_normal_wait
)
3339 blank_state
= blank_off
;
3341 /* entering graphics mode? */
3345 vc
->vc_sw
->con_blank(vc
, -1, 1);
3346 console_blanked
= fg_console
+ 1;
3351 /* don't blank graphics */
3352 if (vc
->vc_mode
!= KD_TEXT
) {
3353 console_blanked
= fg_console
+ 1;
3358 del_timer_sync(&console_timer
);
3359 blank_timer_expired
= 0;
3362 /* In case we need to reset origin, blanking hook returns 1 */
3363 i
= vc
->vc_sw
->con_blank(vc
, vesa_off_interval
? 1 : (vesa_blank_mode
+ 1), 0);
3364 console_blanked
= fg_console
+ 1;
3368 if (console_blank_hook
&& console_blank_hook(1))
3371 if (vesa_off_interval
&& vesa_blank_mode
) {
3372 blank_state
= blank_vesa_wait
;
3373 mod_timer(&console_timer
, jiffies
+ vesa_off_interval
);
3376 EXPORT_SYMBOL(do_blank_screen
);
3379 * Called by timer as well as from vt_console_driver
3381 void do_unblank_screen(int leaving_gfx
)
3385 /* This should now always be called from a "sane" (read: can schedule)
3386 * context for the sake of the low level drivers, except in the special
3387 * case of oops_in_progress
3389 if (!oops_in_progress
)
3392 WARN_CONSOLE_UNLOCKED();
3395 if (!console_blanked
)
3397 if (!vc_cons_allocated(fg_console
)) {
3399 printk("unblank_screen: tty %d not allocated ??\n", fg_console
+1);
3402 vc
= vc_cons
[fg_console
].d
;
3403 if (vc
->vc_mode
!= KD_TEXT
)
3404 return; /* but leave console_blanked != 0 */
3406 if (blankinterval
) {
3407 mod_timer(&console_timer
, jiffies
+ blankinterval
);
3408 blank_state
= blank_normal_wait
;
3411 console_blanked
= 0;
3412 if (vc
->vc_sw
->con_blank(vc
, 0, leaving_gfx
))
3413 /* Low-level driver cannot restore -> do it ourselves */
3415 if (console_blank_hook
)
3416 console_blank_hook(0);
3420 EXPORT_SYMBOL(do_unblank_screen
);
3423 * This is called by the outside world to cause a forced unblank, mostly for
3424 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
3425 * call it with 1 as an argument and so force a mode restore... that may kill
3426 * X or at least garbage the screen but would also make the Oops visible...
3428 void unblank_screen(void)
3430 do_unblank_screen(0);
3434 * We defer the timer blanking to work queue so it can take the console mutex
3435 * (console operations can still happen at irq time, but only from printk which
3436 * has the console mutex. Not perfect yet, but better than no locking
3438 static void blank_screen_t(unsigned long dummy
)
3440 if (unlikely(!keventd_up())) {
3441 mod_timer(&console_timer
, jiffies
+ blankinterval
);
3444 blank_timer_expired
= 1;
3445 schedule_work(&console_work
);
3448 void poke_blanked_console(void)
3450 WARN_CONSOLE_UNLOCKED();
3452 /* Add this so we quickly catch whoever might call us in a non
3453 * safe context. Nowadays, unblank_screen() isn't to be called in
3454 * atomic contexts and is allowed to schedule (with the special case
3455 * of oops_in_progress, but that isn't of any concern for this
3460 /* This isn't perfectly race free, but a race here would be mostly harmless,
3461 * at worse, we'll do a spurrious blank and it's unlikely
3463 del_timer(&console_timer
);
3464 blank_timer_expired
= 0;
3466 if (ignore_poke
|| !vc_cons
[fg_console
].d
|| vc_cons
[fg_console
].d
->vc_mode
== KD_GRAPHICS
)
3468 if (console_blanked
)
3470 else if (blankinterval
) {
3471 mod_timer(&console_timer
, jiffies
+ blankinterval
);
3472 blank_state
= blank_normal_wait
;
3480 static void set_palette(struct vc_data
*vc
)
3482 WARN_CONSOLE_UNLOCKED();
3484 if (vc
->vc_mode
!= KD_GRAPHICS
)
3485 vc
->vc_sw
->con_set_palette(vc
, color_table
);
3488 static int set_get_cmap(unsigned char __user
*arg
, int set
)
3492 WARN_CONSOLE_UNLOCKED();
3494 for (i
= 0; i
< 16; i
++)
3496 get_user(default_red
[i
], arg
++);
3497 get_user(default_grn
[i
], arg
++);
3498 get_user(default_blu
[i
], arg
++);
3500 put_user(default_red
[i
], arg
++);
3501 put_user(default_grn
[i
], arg
++);
3502 put_user(default_blu
[i
], arg
++);
3505 for (i
= 0; i
< MAX_NR_CONSOLES
; i
++)
3506 if (vc_cons_allocated(i
)) {
3507 for (j
= k
= 0; j
< 16; j
++) {
3508 vc_cons
[i
].d
->vc_palette
[k
++] = default_red
[j
];
3509 vc_cons
[i
].d
->vc_palette
[k
++] = default_grn
[j
];
3510 vc_cons
[i
].d
->vc_palette
[k
++] = default_blu
[j
];
3512 set_palette(vc_cons
[i
].d
);
3519 * Load palette into the DAC registers. arg points to a colour
3520 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
3523 int con_set_cmap(unsigned char __user
*arg
)
3527 acquire_console_sem();
3528 rc
= set_get_cmap (arg
,1);
3529 release_console_sem();
3534 int con_get_cmap(unsigned char __user
*arg
)
3538 acquire_console_sem();
3539 rc
= set_get_cmap (arg
,0);
3540 release_console_sem();
3545 void reset_palette(struct vc_data
*vc
)
3548 for (j
=k
=0; j
<16; j
++) {
3549 vc
->vc_palette
[k
++] = default_red
[j
];
3550 vc
->vc_palette
[k
++] = default_grn
[j
];
3551 vc
->vc_palette
[k
++] = default_blu
[j
];
3559 * Currently we only support fonts up to 32 pixels wide, at a maximum height
3560 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
3561 * depending on width) reserved for each character which is kinda wasty, but
3562 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
3563 * is upto the actual low-level console-driver convert data into its favorite
3564 * format (maybe we should add a `fontoffset' field to the `display'
3565 * structure so we won't have to convert the fontdata all the time.
3569 #define max_font_size 65536
3571 static int con_font_get(struct vc_data
*vc
, struct console_font_op
*op
)
3573 struct console_font font
;
3577 if (vc
->vc_mode
!= KD_TEXT
)
3581 font
.data
= kmalloc(max_font_size
, GFP_KERNEL
);
3587 acquire_console_sem();
3588 if (vc
->vc_sw
->con_font_get
)
3589 rc
= vc
->vc_sw
->con_font_get(vc
, &font
);
3592 release_console_sem();
3597 c
= (font
.width
+7)/8 * 32 * font
.charcount
;
3599 if (op
->data
&& font
.charcount
> op
->charcount
)
3601 if (!(op
->flags
& KD_FONT_FLAG_OLD
)) {
3602 if (font
.width
> op
->width
|| font
.height
> op
->height
)
3605 if (font
.width
!= 8)
3607 else if ((op
->height
&& font
.height
> op
->height
) ||
3614 op
->height
= font
.height
;
3615 op
->width
= font
.width
;
3616 op
->charcount
= font
.charcount
;
3618 if (op
->data
&& copy_to_user(op
->data
, font
.data
, c
))
3626 static int con_font_set(struct vc_data
*vc
, struct console_font_op
*op
)
3628 struct console_font font
;
3632 if (vc
->vc_mode
!= KD_TEXT
)
3636 if (op
->charcount
> 512)
3638 if (!op
->height
) { /* Need to guess font height [compat] */
3640 u8 __user
*charmap
= op
->data
;
3643 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
3644 so that we can get rid of this soon */
3645 if (!(op
->flags
& KD_FONT_FLAG_OLD
))
3647 for (h
= 32; h
> 0; h
--)
3648 for (i
= 0; i
< op
->charcount
; i
++) {
3649 if (get_user(tmp
, &charmap
[32*i
+h
-1]))
3658 if (op
->width
<= 0 || op
->width
> 32 || op
->height
> 32)
3660 size
= (op
->width
+7)/8 * 32 * op
->charcount
;
3661 if (size
> max_font_size
)
3663 font
.charcount
= op
->charcount
;
3664 font
.height
= op
->height
;
3665 font
.width
= op
->width
;
3666 font
.data
= kmalloc(size
, GFP_KERNEL
);
3669 if (copy_from_user(font
.data
, op
->data
, size
)) {
3673 acquire_console_sem();
3674 if (vc
->vc_sw
->con_font_set
)
3675 rc
= vc
->vc_sw
->con_font_set(vc
, &font
, op
->flags
);
3678 release_console_sem();
3683 static int con_font_default(struct vc_data
*vc
, struct console_font_op
*op
)
3685 struct console_font font
= {.width
= op
->width
, .height
= op
->height
};
3686 char name
[MAX_FONT_NAME
];
3690 if (vc
->vc_mode
!= KD_TEXT
)
3695 else if (strncpy_from_user(name
, op
->data
, MAX_FONT_NAME
- 1) < 0)
3698 name
[MAX_FONT_NAME
- 1] = 0;
3700 acquire_console_sem();
3701 if (vc
->vc_sw
->con_font_default
)
3702 rc
= vc
->vc_sw
->con_font_default(vc
, &font
, s
);
3705 release_console_sem();
3707 op
->width
= font
.width
;
3708 op
->height
= font
.height
;
3713 static int con_font_copy(struct vc_data
*vc
, struct console_font_op
*op
)
3715 int con
= op
->height
;
3718 if (vc
->vc_mode
!= KD_TEXT
)
3721 acquire_console_sem();
3722 if (!vc
->vc_sw
->con_font_copy
)
3724 else if (con
< 0 || !vc_cons_allocated(con
))
3726 else if (con
== vc
->vc_num
) /* nothing to do */
3729 rc
= vc
->vc_sw
->con_font_copy(vc
, con
);
3730 release_console_sem();
3734 int con_font_op(struct vc_data
*vc
, struct console_font_op
*op
)
3737 case KD_FONT_OP_SET
:
3738 return con_font_set(vc
, op
);
3739 case KD_FONT_OP_GET
:
3740 return con_font_get(vc
, op
);
3741 case KD_FONT_OP_SET_DEFAULT
:
3742 return con_font_default(vc
, op
);
3743 case KD_FONT_OP_COPY
:
3744 return con_font_copy(vc
, op
);
3750 * Interface exported to selection and vcs.
3753 /* used by selection */
3754 u16
screen_glyph(struct vc_data
*vc
, int offset
)
3756 u16 w
= scr_readw(screenpos(vc
, offset
, 1));
3759 if (w
& vc
->vc_hi_font_mask
)
3764 /* used by vcs - note the word offset */
3765 unsigned short *screen_pos(struct vc_data
*vc
, int w_offset
, int viewed
)
3767 return screenpos(vc
, 2 * w_offset
, viewed
);
3770 void getconsxy(struct vc_data
*vc
, unsigned char *p
)
3776 void putconsxy(struct vc_data
*vc
, unsigned char *p
)
3779 gotoxy(vc
, p
[0], p
[1]);
3783 u16
vcs_scr_readw(struct vc_data
*vc
, const u16
*org
)
3785 if ((unsigned long)org
== vc
->vc_pos
&& softcursor_original
!= -1)
3786 return softcursor_original
;
3787 return scr_readw(org
);
3790 void vcs_scr_writew(struct vc_data
*vc
, u16 val
, u16
*org
)
3792 scr_writew(val
, org
);
3793 if ((unsigned long)org
== vc
->vc_pos
) {
3794 softcursor_original
= -1;
3800 * Visible symbols for modules
3803 EXPORT_SYMBOL(color_table
);
3804 EXPORT_SYMBOL(default_red
);
3805 EXPORT_SYMBOL(default_grn
);
3806 EXPORT_SYMBOL(default_blu
);
3807 EXPORT_SYMBOL(update_region
);
3808 EXPORT_SYMBOL(redraw_screen
);
3809 EXPORT_SYMBOL(vc_resize
);
3810 EXPORT_SYMBOL(vc_lock_resize
);
3811 EXPORT_SYMBOL(fg_console
);
3812 EXPORT_SYMBOL(console_blank_hook
);
3813 EXPORT_SYMBOL(console_blanked
);
3814 EXPORT_SYMBOL(vc_cons
);
3815 #ifndef VT_SINGLE_DRIVER
3816 EXPORT_SYMBOL(take_over_console
);
3817 EXPORT_SYMBOL(give_up_console
);