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
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>
77 #include <linux/slab.h>
78 #include <linux/major.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>
92 #include <linux/font.h>
93 #include <linux/bitops.h>
96 #include <asm/system.h>
97 #include <asm/uaccess.h>
99 #define MAX_NR_CON_DRIVER 16
101 #define CON_DRIVER_FLAG_MODULE 1
102 #define CON_DRIVER_FLAG_INIT 2
105 const struct consw
*con
;
107 struct class_device
*class_dev
;
114 static struct con_driver registered_con_driver
[MAX_NR_CON_DRIVER
];
115 const struct consw
*conswitchp
;
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.
122 #define CTRL_ACTION 0x0d00ff81
123 #define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */
126 * Here is the default bell parameters: 750HZ, 1/8th of a second
128 #define DEFAULT_BELL_PITCH 750
129 #define DEFAULT_BELL_DURATION (HZ/8)
131 extern void vcs_make_devfs(struct tty_struct
*tty
);
132 extern void vcs_remove_devfs(struct tty_struct
*tty
);
134 extern void console_map_init(void);
135 #ifdef CONFIG_PROM_CONSOLE
136 extern void prom_con_init(void);
138 #ifdef CONFIG_MDA_CONSOLE
139 extern int mda_console_init(void);
142 struct vc vc_cons
[MAX_NR_CONSOLES
];
144 #ifndef VT_SINGLE_DRIVER
145 static const struct consw
*con_driver_map
[MAX_NR_CONSOLES
];
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
);
162 static int printable
; /* Is console ready for printing? */
165 * ignore_poke: don't unblank the screen when things are typed. This is
166 * mainly for the privacy of braille terminal users.
168 static int ignore_poke
;
170 int do_poke_blanked_console
;
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
;
177 static DECLARE_WORK(console_work
, console_callback
, NULL
);
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,
187 int want_console
= -1;
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".
196 static struct vc_data
*master_display_fg
;
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().
206 * For the same reason, we defer scrollback to the console callback.
208 static int scrollback_delta
;
211 * Hook so that the power management routines can (un)blank
212 * the console on our behalf.
214 int (*console_blank_hook
)(int);
216 static struct timer_list console_timer
;
217 static int blank_state
;
218 static int blank_timer_expired
;
226 * Low-Level Functions
229 #define IS_FG(vc) ((vc)->vc_num == fg_console)
231 #ifdef VT_BUF_VRAM_ONLY
232 #define DO_UPDATE(vc) 0
234 #define DO_UPDATE(vc) CON_IS_VISIBLE(vc)
237 static inline unsigned short *screenpos(struct vc_data
*vc
, int offset
, int 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
);
246 p
= vc
->vc_sw
->con_screen_pos(vc
, offset
);
250 static inline void scrolldelta(int lines
)
252 scrollback_delta
+= lines
;
253 schedule_console_callback();
256 void schedule_console_callback(void)
258 schedule_work(&console_work
);
261 static void scrup(struct vc_data
*vc
, unsigned int t
, unsigned int b
, int nr
)
263 unsigned short *d
, *s
;
267 if (b
> vc
->vc_rows
|| t
>= b
|| nr
< 1)
269 if (CON_IS_VISIBLE(vc
) && vc
->vc_sw
->con_scroll(vc
, t
, b
, SM_UP
, nr
))
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
);
278 static void scrdown(struct vc_data
*vc
, unsigned int t
, unsigned int b
, int nr
)
285 if (b
> vc
->vc_rows
|| t
>= b
|| nr
< 1)
287 if (CON_IS_VISIBLE(vc
) && vc
->vc_sw
->con_scroll(vc
, t
, b
, SM_DOWN
, nr
))
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
);
295 static void do_update_region(struct vc_data
*vc
, unsigned long start
, int count
)
297 #ifndef VT_BUF_VRAM_ONLY
298 unsigned int xx
, yy
, offset
;
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
;
308 start
= vc
->vc_sw
->con_getxy(vc
, start
, &nxx
, &nyy
);
312 u16 attrib
= scr_readw(p
) & 0xff00;
315 while (xx
< vc
->vc_cols
&& count
) {
316 if (attrib
!= (scr_readw(p
) & 0xff00)) {
318 vc
->vc_sw
->con_putcs(vc
, q
, p
-q
, yy
, startx
);
321 attrib
= scr_readw(p
) & 0xff00;
328 vc
->vc_sw
->con_putcs(vc
, q
, p
-q
, yy
, startx
);
333 if (vc
->vc_sw
->con_getxy
) {
335 start
= vc
->vc_sw
->con_getxy(vc
, start
, NULL
, NULL
);
341 void update_region(struct vc_data
*vc
, unsigned long start
, int count
)
343 WARN_CONSOLE_UNLOCKED();
347 do_update_region(vc
, start
, count
);
352 /* Structure of attributes is hardware-dependent */
354 static u8
build_attr(struct vc_data
*vc
, u8 _color
, u8 _intensity
, u8 _blink
, u8 _underline
, u8 _reverse
)
356 if (vc
->vc_sw
->con_build_attr
)
357 return vc
->vc_sw
->con_build_attr(vc
, _color
, _intensity
, _blink
, _underline
, _reverse
);
359 #ifndef VT_BUF_VRAM_ONLY
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)
372 if (!vc
->vc_can_do_color
)
374 (_underline
? 4 : 0) |
378 a
= (a
& 0xf0) | vc
->vc_ulcolor
;
379 else if (_intensity
== 0)
380 a
= (a
& 0xf0) | vc
->vc_ulcolor
;
382 a
= ((a
) & 0x88) | ((((a
) >> 4) | ((a
) << 4)) & 0x77);
387 if (vc
->vc_hi_font_mask
== 0x100)
396 static void update_attr(struct vc_data
*vc
)
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) | ' ';
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
)
407 WARN_CONSOLE_UNLOCKED();
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
419 if (!vc
->vc_can_do_color
) {
426 } else if (vc
->vc_hi_font_mask
== 0x100) {
429 a
= ((a
) & 0x11ff) | (((a
) & 0xe000) >> 4) | (((a
) & 0x0e00) << 4);
436 a
= ((a
) & 0x88ff) | (((a
) & 0x7000) >> 4) | (((a
) & 0x0700) << 4);
444 do_update_region(vc
, (unsigned long) p
, count
);
447 /* used by selection: complement pointer position */
448 void complement_pos(struct vc_data
*vc
, int offset
)
450 static int old_offset
= -1;
451 static unsigned short old
;
452 static unsigned short oldx
, oldy
;
454 WARN_CONSOLE_UNLOCKED();
456 if (old_offset
!= -1 && old_offset
>= 0 &&
457 old_offset
< vc
->vc_screenbuf_size
) {
458 scr_writew(old
, screenpos(vc
, old_offset
, 1));
460 vc
->vc_sw
->con_putc(vc
, old
, oldy
, oldx
);
465 if (offset
!= -1 && offset
>= 0 &&
466 offset
< vc
->vc_screenbuf_size
) {
469 p
= screenpos(vc
, offset
, 1);
471 new = old
^ vc
->vc_complement_mask
;
474 oldx
= (offset
>> 1) % vc
->vc_cols
;
475 oldy
= (offset
>> 1) / vc
->vc_cols
;
476 vc
->vc_sw
->con_putc(vc
, new, oldy
, oldx
);
482 static void insert_char(struct vc_data
*vc
, unsigned int nr
)
484 unsigned short *p
, *q
= (unsigned short *)vc
->vc_pos
;
486 p
= q
+ vc
->vc_cols
- nr
- vc
->vc_x
;
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;
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;
497 vc
->vc_sw
->con_putc(vc
, vc
->vc_video_erase_char
, vc
->vc_y
, vc
->vc_x
+ nr
);
498 vc
->vc_attr
= oldattr
;
502 static void delete_char(struct vc_data
*vc
, unsigned int nr
)
504 unsigned int i
= vc
->vc_x
;
505 unsigned short *p
= (unsigned short *)vc
->vc_pos
;
507 while (++i
<= vc
->vc_cols
- nr
) {
508 scr_writew(scr_readw(p
+nr
), p
);
511 scr_memsetw(p
, vc
->vc_video_erase_char
, nr
* 2);
512 vc
->vc_need_wrap
= 0;
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;
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
;
525 static int softcursor_original
;
527 static void add_softcursor(struct vc_data
*vc
)
529 int i
= scr_readw((u16
*) vc
->vc_pos
);
530 u32 type
= vc
->vc_cursor_type
;
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
);
541 vc
->vc_sw
->con_putc(vc
, i
, vc
->vc_y
, vc
->vc_x
);
544 static void hide_softcursor(struct vc_data
*vc
)
546 if (softcursor_original
!= -1) {
547 scr_writew(softcursor_original
, (u16
*)vc
->vc_pos
);
549 vc
->vc_sw
->con_putc(vc
, softcursor_original
,
551 softcursor_original
= -1;
555 static void hide_cursor(struct vc_data
*vc
)
559 vc
->vc_sw
->con_cursor(vc
, CM_ERASE
);
563 static void set_cursor(struct vc_data
*vc
)
565 if (!IS_FG(vc
) || console_blanked
||
566 vc
->vc_mode
== KD_GRAPHICS
)
572 if ((vc
->vc_cursor_type
& 0x0f) != 1)
573 vc
->vc_sw
->con_cursor(vc
, CM_DRAW
);
578 static void set_origin(struct vc_data
*vc
)
580 WARN_CONSOLE_UNLOCKED();
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
;
591 static inline void save_screen(struct vc_data
*vc
)
593 WARN_CONSOLE_UNLOCKED();
595 if (vc
->vc_sw
->con_save_screen
)
596 vc
->vc_sw
->con_save_screen(vc
);
600 * Redrawing of screen
603 static void clear_buffer_attributes(struct vc_data
*vc
)
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;
609 for (; count
> 0; count
--, p
++) {
610 scr_writew((scr_readw(p
)&mask
) | (vc
->vc_video_erase_char
& ~mask
), p
);
614 void redraw_screen(struct vc_data
*vc
, int is_switch
)
618 WARN_CONSOLE_UNLOCKED();
622 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
627 struct vc_data
*old_vc
= vc_cons
[fg_console
].d
;
630 if (!CON_IS_VISIBLE(vc
))
632 *vc
->vc_display_fg
= vc
;
633 fg_console
= vc
->vc_num
;
635 if (!CON_IS_VISIBLE(old_vc
)) {
646 int old_was_color
= vc
->vc_can_do_color
;
649 update
= vc
->vc_sw
->con_switch(vc
);
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.
657 if (old_was_color
!= vc
->vc_can_do_color
) {
659 clear_buffer_attributes(vc
);
661 if (update
&& vc
->vc_mode
!= KD_GRAPHICS
)
662 do_update_region(vc
, vc
->vc_origin
, vc
->vc_screenbuf_size
/ 2);
667 compute_shiftstate();
672 * Allocation, freeing and resizing of VTs.
675 int vc_cons_allocated(unsigned int i
)
677 return (i
< MAX_NR_CONSOLES
&& vc_cons
[i
].d
);
680 static void visual_init(struct vc_data
*vc
, int num
, int init
)
682 /* ++Geert: vc->vc_sw->con_init determines console size */
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
];
690 __module_get(vc
->vc_sw
->owner
);
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
;
706 int vc_allocate(unsigned int currcons
) /* return 0 on success */
708 WARN_CONSOLE_UNLOCKED();
710 if (currcons
>= MAX_NR_CONSOLES
)
712 if (!vc_cons
[currcons
].d
) {
715 /* prevent users from taking too much memory */
716 if (currcons
>= MAX_NR_USER_CONSOLES
&& !capable(CAP_SYS_RESOURCE
))
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
);
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
) {
736 vc_cons
[currcons
].d
= NULL
;
739 vc
->vc_kmalloced
= 1;
740 vc_init(vc
, vc
->vc_rows
, vc
->vc_cols
, 1);
745 static inline int resize_screen(struct vc_data
*vc
, int width
, int height
)
747 /* Resizes the resolution of the display adapater */
750 if (vc
->vc_mode
!= KD_GRAPHICS
&& vc
->vc_sw
->con_resize
)
751 err
= vc
->vc_sw
->con_resize(vc
, width
, height
);
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]
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
)
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
;
768 unsigned short *newscreen
;
770 WARN_CONSOLE_UNLOCKED();
775 if (cols
> VC_RESIZE_MAXCOL
|| lines
> VC_RESIZE_MAXROW
)
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
;
783 if (new_cols
== vc
->vc_cols
&& new_rows
== vc
->vc_rows
)
786 newscreen
= (unsigned short *) kmalloc(new_screen_size
, GFP_USER
);
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
;
795 err
= resize_screen(vc
, new_cols
, new_rows
);
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
;
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
;
812 if (vc
->vc_y
> new_rows
) {
813 if (old_rows
- vc
->vc_y
< new_rows
) {
815 * Cursor near the bottom, copy contents from the
818 old_origin
+= (old_rows
- new_rows
) * old_row_size
;
819 end
= vc
->vc_scr_end
;
822 * Cursor is in no man's land, copy 1/2 screenful
823 * from the top and bottom of cursor position
825 old_origin
+= (vc
->vc_y
- new_rows
/2) * old_row_size
;
826 end
= old_origin
+ (old_row_size
* new_rows
);
830 * Cursor near the top, copy contents from the top of buffer
832 end
= (old_rows
> new_rows
) ? old_origin
+
833 (old_row_size
* new_rows
) :
838 while (old_origin
< end
) {
839 scr_memcpyw((unsigned short *) new_origin
,
840 (unsigned short *) old_origin
, rlth
);
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
;
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
;
857 /* do part of a reset_terminal() */
859 vc
->vc_bottom
= vc
->vc_rows
;
860 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
);
864 struct winsize ws
, *cws
= &vc
->vc_tty
->winsize
;
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);
876 if (CON_IS_VISIBLE(vc
))
882 void vc_disallocate(unsigned int currcons
)
884 WARN_CONSOLE_UNLOCKED();
886 if (vc_cons_allocated(currcons
)) {
887 struct vc_data
*vc
= vc_cons
[currcons
].d
;
888 vc
->vc_sw
->con_deinit(vc
);
889 if (vc
->vc_kmalloced
)
890 kfree(vc
->vc_screenbuf
);
891 if (currcons
>= MIN_NR_CONSOLES
)
893 vc_cons
[currcons
].d
= NULL
;
901 #define set_kbd(vc, x) set_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
902 #define clr_kbd(vc, x) clr_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
903 #define is_kbd(vc, x) vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
905 #define decarm VC_REPEAT
906 #define decckm VC_CKMODE
907 #define kbdapplic VC_APPLIC
911 * this is what the terminal answers to a ESC-Z or csi0c query.
913 #define VT100ID "\033[?1;2c"
914 #define VT102ID "\033[?6c"
916 unsigned char color_table
[] = { 0, 4, 2, 6, 1, 5, 3, 7,
917 8,12,10,14, 9,13,11,15 };
919 /* the default colour table, for VGA+ colour systems */
920 int default_red
[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
921 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
922 int default_grn
[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
923 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
924 int default_blu
[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
925 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
928 * gotoxy() must verify all boundaries, because the arguments
929 * might also be negative. If the given position is out of
930 * bounds, the cursor is placed at the nearest margin.
932 static void gotoxy(struct vc_data
*vc
, int new_x
, int new_y
)
939 if (new_x
>= vc
->vc_cols
)
940 vc
->vc_x
= vc
->vc_cols
- 1;
947 max_y
= vc
->vc_bottom
;
954 else if (new_y
>= max_y
)
955 vc
->vc_y
= max_y
- 1;
958 vc
->vc_pos
= vc
->vc_origin
+ vc
->vc_y
* vc
->vc_size_row
+ (vc
->vc_x
<<1);
959 vc
->vc_need_wrap
= 0;
962 /* for absolute user moves, when decom is set */
963 static void gotoxay(struct vc_data
*vc
, int new_x
, int new_y
)
965 gotoxy(vc
, new_x
, vc
->vc_decom
? (vc
->vc_top
+ new_y
) : new_y
);
968 void scrollback(struct vc_data
*vc
, int lines
)
971 lines
= vc
->vc_rows
/ 2;
975 void scrollfront(struct vc_data
*vc
, int lines
)
978 lines
= vc
->vc_rows
/ 2;
982 static void lf(struct vc_data
*vc
)
984 /* don't scroll if above bottom of scrolling region, or
985 * if below scrolling region
987 if (vc
->vc_y
+ 1 == vc
->vc_bottom
)
988 scrup(vc
, vc
->vc_top
, vc
->vc_bottom
, 1);
989 else if (vc
->vc_y
< vc
->vc_rows
- 1) {
991 vc
->vc_pos
+= vc
->vc_size_row
;
993 vc
->vc_need_wrap
= 0;
996 static void ri(struct vc_data
*vc
)
998 /* don't scroll if below top of scrolling region, or
999 * if above scrolling region
1001 if (vc
->vc_y
== vc
->vc_top
)
1002 scrdown(vc
, vc
->vc_top
, vc
->vc_bottom
, 1);
1003 else if (vc
->vc_y
> 0) {
1005 vc
->vc_pos
-= vc
->vc_size_row
;
1007 vc
->vc_need_wrap
= 0;
1010 static inline void cr(struct vc_data
*vc
)
1012 vc
->vc_pos
-= vc
->vc_x
<< 1;
1013 vc
->vc_need_wrap
= vc
->vc_x
= 0;
1016 static inline void bs(struct vc_data
*vc
)
1021 vc
->vc_need_wrap
= 0;
1025 static inline void del(struct vc_data
*vc
)
1030 static void csi_J(struct vc_data
*vc
, int vpar
)
1033 unsigned short * start
;
1036 case 0: /* erase from cursor to end of display */
1037 count
= (vc
->vc_scr_end
- vc
->vc_pos
) >> 1;
1038 start
= (unsigned short *)vc
->vc_pos
;
1039 if (DO_UPDATE(vc
)) {
1040 /* do in two stages */
1041 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, vc
->vc_x
, 1,
1042 vc
->vc_cols
- vc
->vc_x
);
1043 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
+ 1, 0,
1044 vc
->vc_rows
- vc
->vc_y
- 1,
1048 case 1: /* erase from start to cursor */
1049 count
= ((vc
->vc_pos
- vc
->vc_origin
) >> 1) + 1;
1050 start
= (unsigned short *)vc
->vc_origin
;
1051 if (DO_UPDATE(vc
)) {
1052 /* do in two stages */
1053 vc
->vc_sw
->con_clear(vc
, 0, 0, vc
->vc_y
,
1055 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, 0, 1,
1059 case 2: /* erase whole display */
1060 count
= vc
->vc_cols
* vc
->vc_rows
;
1061 start
= (unsigned short *)vc
->vc_origin
;
1063 vc
->vc_sw
->con_clear(vc
, 0, 0,
1070 scr_memsetw(start
, vc
->vc_video_erase_char
, 2 * count
);
1071 vc
->vc_need_wrap
= 0;
1074 static void csi_K(struct vc_data
*vc
, int vpar
)
1077 unsigned short * start
;
1080 case 0: /* erase from cursor to end of line */
1081 count
= vc
->vc_cols
- vc
->vc_x
;
1082 start
= (unsigned short *)vc
->vc_pos
;
1084 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, vc
->vc_x
, 1,
1085 vc
->vc_cols
- vc
->vc_x
);
1087 case 1: /* erase from start of line to cursor */
1088 start
= (unsigned short *)(vc
->vc_pos
- (vc
->vc_x
<< 1));
1089 count
= vc
->vc_x
+ 1;
1091 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, 0, 1,
1094 case 2: /* erase whole line */
1095 start
= (unsigned short *)(vc
->vc_pos
- (vc
->vc_x
<< 1));
1096 count
= vc
->vc_cols
;
1098 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, 0, 1,
1104 scr_memsetw(start
, vc
->vc_video_erase_char
, 2 * count
);
1105 vc
->vc_need_wrap
= 0;
1108 static void csi_X(struct vc_data
*vc
, int vpar
) /* erase the following vpar positions */
1114 count
= (vpar
> vc
->vc_cols
- vc
->vc_x
) ? (vc
->vc_cols
- vc
->vc_x
) : vpar
;
1116 scr_memsetw((unsigned short *)vc
->vc_pos
, vc
->vc_video_erase_char
, 2 * count
);
1118 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, vc
->vc_x
, 1, count
);
1119 vc
->vc_need_wrap
= 0;
1122 static void default_attr(struct vc_data
*vc
)
1124 vc
->vc_intensity
= 1;
1125 vc
->vc_underline
= 0;
1128 vc
->vc_color
= vc
->vc_def_color
;
1131 /* console_sem is held */
1132 static void csi_m(struct vc_data
*vc
)
1136 for (i
= 0; i
<= vc
->vc_npar
; i
++)
1137 switch (vc
->vc_par
[i
]) {
1138 case 0: /* all attributes off */
1142 vc
->vc_intensity
= 2;
1145 vc
->vc_intensity
= 0;
1148 vc
->vc_underline
= 1;
1156 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1157 * Select primary font, don't display
1158 * control chars if defined, don't set
1161 vc
->vc_translate
= set_translate(vc
->vc_charset
== 0
1163 : vc
->vc_G1_charset
, vc
);
1164 vc
->vc_disp_ctrl
= 0;
1165 vc
->vc_toggle_meta
= 0;
1167 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1168 * Select first alternate font, lets
1169 * chars < 32 be displayed as ROM chars.
1171 vc
->vc_translate
= set_translate(IBMPC_MAP
, vc
);
1172 vc
->vc_disp_ctrl
= 1;
1173 vc
->vc_toggle_meta
= 0;
1175 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1176 * Select second alternate font, toggle
1177 * high bit before displaying as ROM char.
1179 vc
->vc_translate
= set_translate(IBMPC_MAP
, vc
);
1180 vc
->vc_disp_ctrl
= 1;
1181 vc
->vc_toggle_meta
= 1;
1185 vc
->vc_intensity
= 1;
1188 vc
->vc_underline
= 0;
1196 case 38: /* ANSI X3.64-1979 (SCO-ish?)
1197 * Enables underscore, white foreground
1198 * with white underscore (Linux - use
1199 * default foreground).
1201 vc
->vc_color
= (vc
->vc_def_color
& 0x0f) | (vc
->vc_color
& 0xf0);
1202 vc
->vc_underline
= 1;
1204 case 39: /* ANSI X3.64-1979 (SCO-ish?)
1205 * Disable underline option.
1206 * Reset colour to default? It did this
1209 vc
->vc_color
= (vc
->vc_def_color
& 0x0f) | (vc
->vc_color
& 0xf0);
1210 vc
->vc_underline
= 0;
1213 vc
->vc_color
= (vc
->vc_def_color
& 0xf0) | (vc
->vc_color
& 0x0f);
1216 if (vc
->vc_par
[i
] >= 30 && vc
->vc_par
[i
] <= 37)
1217 vc
->vc_color
= color_table
[vc
->vc_par
[i
] - 30]
1218 | (vc
->vc_color
& 0xf0);
1219 else if (vc
->vc_par
[i
] >= 40 && vc
->vc_par
[i
] <= 47)
1220 vc
->vc_color
= (color_table
[vc
->vc_par
[i
] - 40] << 4)
1221 | (vc
->vc_color
& 0x0f);
1227 static void respond_string(const char *p
, struct tty_struct
*tty
)
1230 tty_insert_flip_char(tty
, *p
, 0);
1233 con_schedule_flip(tty
);
1236 static void cursor_report(struct vc_data
*vc
, struct tty_struct
*tty
)
1240 sprintf(buf
, "\033[%d;%dR", vc
->vc_y
+ (vc
->vc_decom
? vc
->vc_top
+ 1 : 1), vc
->vc_x
+ 1);
1241 respond_string(buf
, tty
);
1244 static inline void status_report(struct tty_struct
*tty
)
1246 respond_string("\033[0n", tty
); /* Terminal ok */
1249 static inline void respond_ID(struct tty_struct
* tty
)
1251 respond_string(VT102ID
, tty
);
1254 void mouse_report(struct tty_struct
*tty
, int butt
, int mrx
, int mry
)
1258 sprintf(buf
, "\033[M%c%c%c", (char)(' ' + butt
), (char)('!' + mrx
),
1260 respond_string(buf
, tty
);
1263 /* invoked via ioctl(TIOCLINUX) and through set_selection */
1264 int mouse_reporting(void)
1266 return vc_cons
[fg_console
].d
->vc_report_mouse
;
1269 /* console_sem is held */
1270 static void set_mode(struct vc_data
*vc
, int on_off
)
1274 for (i
= 0; i
<= vc
->vc_npar
; i
++)
1276 switch(vc
->vc_par
[i
]) { /* DEC private modes set/reset */
1277 case 1: /* Cursor keys send ^[Ox/^[[x */
1279 set_kbd(vc
, decckm
);
1281 clr_kbd(vc
, decckm
);
1283 case 3: /* 80/132 mode switch unimplemented */
1284 vc
->vc_deccolm
= on_off
;
1286 vc_resize(deccolm
? 132 : 80, vc
->vc_rows
);
1287 /* this alone does not suffice; some user mode
1288 utility has to change the hardware regs */
1291 case 5: /* Inverted screen on/off */
1292 if (vc
->vc_decscnm
!= on_off
) {
1293 vc
->vc_decscnm
= on_off
;
1294 invert_screen(vc
, 0, vc
->vc_screenbuf_size
, 0);
1298 case 6: /* Origin relative/absolute */
1299 vc
->vc_decom
= on_off
;
1302 case 7: /* Autowrap on/off */
1303 vc
->vc_decawm
= on_off
;
1305 case 8: /* Autorepeat on/off */
1307 set_kbd(vc
, decarm
);
1309 clr_kbd(vc
, decarm
);
1312 vc
->vc_report_mouse
= on_off
? 1 : 0;
1314 case 25: /* Cursor on/off */
1315 vc
->vc_deccm
= on_off
;
1318 vc
->vc_report_mouse
= on_off
? 2 : 0;
1322 switch(vc
->vc_par
[i
]) { /* ANSI modes set/reset */
1323 case 3: /* Monitor (display ctrls) */
1324 vc
->vc_disp_ctrl
= on_off
;
1326 case 4: /* Insert Mode on/off */
1327 vc
->vc_decim
= on_off
;
1329 case 20: /* Lf, Enter == CrLf/Lf */
1339 /* console_sem is held */
1340 static void setterm_command(struct vc_data
*vc
)
1342 switch(vc
->vc_par
[0]) {
1343 case 1: /* set color for underline mode */
1344 if (vc
->vc_can_do_color
&&
1345 vc
->vc_par
[1] < 16) {
1346 vc
->vc_ulcolor
= color_table
[vc
->vc_par
[1]];
1347 if (vc
->vc_underline
)
1351 case 2: /* set color for half intensity mode */
1352 if (vc
->vc_can_do_color
&&
1353 vc
->vc_par
[1] < 16) {
1354 vc
->vc_halfcolor
= color_table
[vc
->vc_par
[1]];
1355 if (vc
->vc_intensity
== 0)
1359 case 8: /* store colors as defaults */
1360 vc
->vc_def_color
= vc
->vc_attr
;
1361 if (vc
->vc_hi_font_mask
== 0x100)
1362 vc
->vc_def_color
>>= 1;
1366 case 9: /* set blanking interval */
1367 blankinterval
= ((vc
->vc_par
[1] < 60) ? vc
->vc_par
[1] : 60) * 60 * HZ
;
1368 poke_blanked_console();
1370 case 10: /* set bell frequency in Hz */
1371 if (vc
->vc_npar
>= 1)
1372 vc
->vc_bell_pitch
= vc
->vc_par
[1];
1374 vc
->vc_bell_pitch
= DEFAULT_BELL_PITCH
;
1376 case 11: /* set bell duration in msec */
1377 if (vc
->vc_npar
>= 1)
1378 vc
->vc_bell_duration
= (vc
->vc_par
[1] < 2000) ?
1379 vc
->vc_par
[1] * HZ
/ 1000 : 0;
1381 vc
->vc_bell_duration
= DEFAULT_BELL_DURATION
;
1383 case 12: /* bring specified console to the front */
1384 if (vc
->vc_par
[1] >= 1 && vc_cons_allocated(vc
->vc_par
[1] - 1))
1385 set_console(vc
->vc_par
[1] - 1);
1387 case 13: /* unblank the screen */
1388 poke_blanked_console();
1390 case 14: /* set vesa powerdown interval */
1391 vesa_off_interval
= ((vc
->vc_par
[1] < 60) ? vc
->vc_par
[1] : 60) * 60 * HZ
;
1393 case 15: /* activate the previous console */
1394 set_console(last_console
);
1399 /* console_sem is held */
1400 static void csi_at(struct vc_data
*vc
, unsigned int nr
)
1402 if (nr
> vc
->vc_cols
- vc
->vc_x
)
1403 nr
= vc
->vc_cols
- vc
->vc_x
;
1406 insert_char(vc
, nr
);
1409 /* console_sem is held */
1410 static void csi_L(struct vc_data
*vc
, unsigned int nr
)
1412 if (nr
> vc
->vc_rows
- vc
->vc_y
)
1413 nr
= vc
->vc_rows
- vc
->vc_y
;
1416 scrdown(vc
, vc
->vc_y
, vc
->vc_bottom
, nr
);
1417 vc
->vc_need_wrap
= 0;
1420 /* console_sem is held */
1421 static void csi_P(struct vc_data
*vc
, unsigned int nr
)
1423 if (nr
> vc
->vc_cols
- vc
->vc_x
)
1424 nr
= vc
->vc_cols
- vc
->vc_x
;
1427 delete_char(vc
, nr
);
1430 /* console_sem is held */
1431 static void csi_M(struct vc_data
*vc
, unsigned int nr
)
1433 if (nr
> vc
->vc_rows
- vc
->vc_y
)
1434 nr
= vc
->vc_rows
- vc
->vc_y
;
1437 scrup(vc
, vc
->vc_y
, vc
->vc_bottom
, nr
);
1438 vc
->vc_need_wrap
= 0;
1441 /* console_sem is held (except via vc_init->reset_terminal */
1442 static void save_cur(struct vc_data
*vc
)
1444 vc
->vc_saved_x
= vc
->vc_x
;
1445 vc
->vc_saved_y
= vc
->vc_y
;
1446 vc
->vc_s_intensity
= vc
->vc_intensity
;
1447 vc
->vc_s_underline
= vc
->vc_underline
;
1448 vc
->vc_s_blink
= vc
->vc_blink
;
1449 vc
->vc_s_reverse
= vc
->vc_reverse
;
1450 vc
->vc_s_charset
= vc
->vc_charset
;
1451 vc
->vc_s_color
= vc
->vc_color
;
1452 vc
->vc_saved_G0
= vc
->vc_G0_charset
;
1453 vc
->vc_saved_G1
= vc
->vc_G1_charset
;
1456 /* console_sem is held */
1457 static void restore_cur(struct vc_data
*vc
)
1459 gotoxy(vc
, vc
->vc_saved_x
, vc
->vc_saved_y
);
1460 vc
->vc_intensity
= vc
->vc_s_intensity
;
1461 vc
->vc_underline
= vc
->vc_s_underline
;
1462 vc
->vc_blink
= vc
->vc_s_blink
;
1463 vc
->vc_reverse
= vc
->vc_s_reverse
;
1464 vc
->vc_charset
= vc
->vc_s_charset
;
1465 vc
->vc_color
= vc
->vc_s_color
;
1466 vc
->vc_G0_charset
= vc
->vc_saved_G0
;
1467 vc
->vc_G1_charset
= vc
->vc_saved_G1
;
1468 vc
->vc_translate
= set_translate(vc
->vc_charset
? vc
->vc_G1_charset
: vc
->vc_G0_charset
, vc
);
1470 vc
->vc_need_wrap
= 0;
1473 enum { ESnormal
, ESesc
, ESsquare
, ESgetpars
, ESgotpars
, ESfunckey
,
1474 EShash
, ESsetG0
, ESsetG1
, ESpercent
, ESignore
, ESnonstd
,
1477 /* console_sem is held (except via vc_init()) */
1478 static void reset_terminal(struct vc_data
*vc
, int do_clear
)
1481 vc
->vc_bottom
= vc
->vc_rows
;
1482 vc
->vc_state
= ESnormal
;
1484 vc
->vc_translate
= set_translate(LAT1_MAP
, vc
);
1485 vc
->vc_G0_charset
= LAT1_MAP
;
1486 vc
->vc_G1_charset
= GRAF_MAP
;
1488 vc
->vc_need_wrap
= 0;
1489 vc
->vc_report_mouse
= 0;
1491 vc
->vc_utf_count
= 0;
1493 vc
->vc_disp_ctrl
= 0;
1494 vc
->vc_toggle_meta
= 0;
1502 set_kbd(vc
, decarm
);
1503 clr_kbd(vc
, decckm
);
1504 clr_kbd(vc
, kbdapplic
);
1506 kbd_table
[vc
->vc_num
].lockstate
= 0;
1507 kbd_table
[vc
->vc_num
].slockstate
= 0;
1508 kbd_table
[vc
->vc_num
].ledmode
= LED_SHOW_FLAGS
;
1509 kbd_table
[vc
->vc_num
].ledflagstate
= kbd_table
[vc
->vc_num
].default_ledflagstate
;
1510 /* do not do set_leds here because this causes an endless tasklet loop
1511 when the keyboard hasn't been initialized yet */
1513 vc
->vc_cursor_type
= CUR_DEFAULT
;
1514 vc
->vc_complement_mask
= vc
->vc_s_complement_mask
;
1519 vc
->vc_tab_stop
[0] = 0x01010100;
1520 vc
->vc_tab_stop
[1] =
1521 vc
->vc_tab_stop
[2] =
1522 vc
->vc_tab_stop
[3] =
1523 vc
->vc_tab_stop
[4] = 0x01010101;
1525 vc
->vc_bell_pitch
= DEFAULT_BELL_PITCH
;
1526 vc
->vc_bell_duration
= DEFAULT_BELL_DURATION
;
1534 /* console_sem is held */
1535 static void do_con_trol(struct tty_struct
*tty
, struct vc_data
*vc
, int c
)
1538 * Control characters can be used in the _middle_
1539 * of an escape sequence.
1545 if (vc
->vc_bell_duration
)
1546 kd_mksound(vc
->vc_bell_pitch
, vc
->vc_bell_duration
);
1552 vc
->vc_pos
-= (vc
->vc_x
<< 1);
1553 while (vc
->vc_x
< vc
->vc_cols
- 1) {
1555 if (vc
->vc_tab_stop
[vc
->vc_x
>> 5] & (1 << (vc
->vc_x
& 31)))
1558 vc
->vc_pos
+= (vc
->vc_x
<< 1);
1560 case 10: case 11: case 12:
1562 if (!is_kbd(vc
, lnm
))
1569 vc
->vc_translate
= set_translate(vc
->vc_G1_charset
, vc
);
1570 vc
->vc_disp_ctrl
= 1;
1574 vc
->vc_translate
= set_translate(vc
->vc_G0_charset
, vc
);
1575 vc
->vc_disp_ctrl
= 0;
1578 vc
->vc_state
= ESnormal
;
1581 vc
->vc_state
= ESesc
;
1587 vc
->vc_state
= ESsquare
;
1590 switch(vc
->vc_state
) {
1592 vc
->vc_state
= ESnormal
;
1595 vc
->vc_state
= ESsquare
;
1598 vc
->vc_state
= ESnonstd
;
1601 vc
->vc_state
= ESpercent
;
1614 vc
->vc_tab_stop
[vc
->vc_x
>> 5] |= (1 << (vc
->vc_x
& 31));
1626 vc
->vc_state
= ESsetG0
;
1629 vc
->vc_state
= ESsetG1
;
1632 vc
->vc_state
= EShash
;
1635 reset_terminal(vc
, 1);
1637 case '>': /* Numeric keypad */
1638 clr_kbd(vc
, kbdapplic
);
1640 case '=': /* Appl. keypad */
1641 set_kbd(vc
, kbdapplic
);
1646 if (c
=='P') { /* palette escape sequence */
1647 for (vc
->vc_npar
= 0; vc
->vc_npar
< NPAR
; vc
->vc_npar
++)
1648 vc
->vc_par
[vc
->vc_npar
] = 0;
1650 vc
->vc_state
= ESpalette
;
1652 } else if (c
=='R') { /* reset palette */
1654 vc
->vc_state
= ESnormal
;
1656 vc
->vc_state
= ESnormal
;
1659 if ( (c
>='0'&&c
<='9') || (c
>='A'&&c
<='F') || (c
>='a'&&c
<='f') ) {
1660 vc
->vc_par
[vc
->vc_npar
++] = (c
> '9' ? (c
& 0xDF) - 'A' + 10 : c
- '0');
1661 if (vc
->vc_npar
== 7) {
1662 int i
= vc
->vc_par
[0] * 3, j
= 1;
1663 vc
->vc_palette
[i
] = 16 * vc
->vc_par
[j
++];
1664 vc
->vc_palette
[i
++] += vc
->vc_par
[j
++];
1665 vc
->vc_palette
[i
] = 16 * vc
->vc_par
[j
++];
1666 vc
->vc_palette
[i
++] += vc
->vc_par
[j
++];
1667 vc
->vc_palette
[i
] = 16 * vc
->vc_par
[j
++];
1668 vc
->vc_palette
[i
] += vc
->vc_par
[j
];
1670 vc
->vc_state
= ESnormal
;
1673 vc
->vc_state
= ESnormal
;
1676 for (vc
->vc_npar
= 0; vc
->vc_npar
< NPAR
; vc
->vc_npar
++)
1677 vc
->vc_par
[vc
->vc_npar
] = 0;
1679 vc
->vc_state
= ESgetpars
;
1680 if (c
== '[') { /* Function key */
1681 vc
->vc_state
=ESfunckey
;
1684 vc
->vc_ques
= (c
== '?');
1688 if (c
== ';' && vc
->vc_npar
< NPAR
- 1) {
1691 } else if (c
>='0' && c
<='9') {
1692 vc
->vc_par
[vc
->vc_npar
] *= 10;
1693 vc
->vc_par
[vc
->vc_npar
] += c
- '0';
1696 vc
->vc_state
= ESgotpars
;
1698 vc
->vc_state
= ESnormal
;
1709 vc
->vc_cursor_type
= vc
->vc_par
[0] | (vc
->vc_par
[1] << 8) | (vc
->vc_par
[2] << 16);
1711 vc
->vc_cursor_type
= CUR_DEFAULT
;
1719 vc
->vc_complement_mask
= vc
->vc_par
[0] << 8 | vc
->vc_par
[1];
1721 vc
->vc_complement_mask
= vc
->vc_s_complement_mask
;
1727 if (vc
->vc_par
[0] == 5)
1729 else if (vc
->vc_par
[0] == 6)
1730 cursor_report(vc
, tty
);
1742 gotoxy(vc
, vc
->vc_par
[0], vc
->vc_y
);
1747 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
- vc
->vc_par
[0]);
1752 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
+ vc
->vc_par
[0]);
1757 gotoxy(vc
, vc
->vc_x
+ vc
->vc_par
[0], vc
->vc_y
);
1762 gotoxy(vc
, vc
->vc_x
- vc
->vc_par
[0], vc
->vc_y
);
1767 gotoxy(vc
, 0, vc
->vc_y
+ vc
->vc_par
[0]);
1772 gotoxy(vc
, 0, vc
->vc_y
- vc
->vc_par
[0]);
1777 gotoxay(vc
, vc
->vc_x
,vc
->vc_par
[0]);
1784 gotoxay(vc
, vc
->vc_par
[1], vc
->vc_par
[0]);
1787 csi_J(vc
, vc
->vc_par
[0]);
1790 csi_K(vc
, vc
->vc_par
[0]);
1793 csi_L(vc
, vc
->vc_par
[0]);
1796 csi_M(vc
, vc
->vc_par
[0]);
1799 csi_P(vc
, vc
->vc_par
[0]);
1807 vc
->vc_tab_stop
[vc
->vc_x
>> 5] &= ~(1 << (vc
->vc_x
& 31));
1808 else if (vc
->vc_par
[0] == 3) {
1809 vc
->vc_tab_stop
[0] =
1810 vc
->vc_tab_stop
[1] =
1811 vc
->vc_tab_stop
[2] =
1812 vc
->vc_tab_stop
[3] =
1813 vc
->vc_tab_stop
[4] = 0;
1819 case 'q': /* DECLL - but only 3 leds */
1820 /* map 0,1,2,3 to 0,1,2,4 */
1821 if (vc
->vc_par
[0] < 4)
1822 setledstate(kbd_table
+ vc
->vc_num
,
1823 (vc
->vc_par
[0] < 3) ? vc
->vc_par
[0] : 4);
1829 vc
->vc_par
[1] = vc
->vc_rows
;
1830 /* Minimum allowed region is 2 lines */
1831 if (vc
->vc_par
[0] < vc
->vc_par
[1] &&
1832 vc
->vc_par
[1] <= vc
->vc_rows
) {
1833 vc
->vc_top
= vc
->vc_par
[0] - 1;
1834 vc
->vc_bottom
= vc
->vc_par
[1];
1845 csi_X(vc
, vc
->vc_par
[0]);
1848 csi_at(vc
, vc
->vc_par
[0]);
1850 case ']': /* setterm functions */
1851 setterm_command(vc
);
1856 vc
->vc_state
= ESnormal
;
1858 case '@': /* defined in ISO 2022 */
1861 case 'G': /* prelim official escape code */
1862 case '8': /* retained for compatibility */
1868 vc
->vc_state
= ESnormal
;
1871 vc
->vc_state
= ESnormal
;
1873 /* DEC screen alignment test. kludge :-) */
1874 vc
->vc_video_erase_char
=
1875 (vc
->vc_video_erase_char
& 0xff00) | 'E';
1877 vc
->vc_video_erase_char
=
1878 (vc
->vc_video_erase_char
& 0xff00) | ' ';
1879 do_update_region(vc
, vc
->vc_origin
, vc
->vc_screenbuf_size
/ 2);
1884 vc
->vc_G0_charset
= GRAF_MAP
;
1886 vc
->vc_G0_charset
= LAT1_MAP
;
1888 vc
->vc_G0_charset
= IBMPC_MAP
;
1890 vc
->vc_G0_charset
= USER_MAP
;
1891 if (vc
->vc_charset
== 0)
1892 vc
->vc_translate
= set_translate(vc
->vc_G0_charset
, vc
);
1893 vc
->vc_state
= ESnormal
;
1897 vc
->vc_G1_charset
= GRAF_MAP
;
1899 vc
->vc_G1_charset
= LAT1_MAP
;
1901 vc
->vc_G1_charset
= IBMPC_MAP
;
1903 vc
->vc_G1_charset
= USER_MAP
;
1904 if (vc
->vc_charset
== 1)
1905 vc
->vc_translate
= set_translate(vc
->vc_G1_charset
, vc
);
1906 vc
->vc_state
= ESnormal
;
1909 vc
->vc_state
= ESnormal
;
1913 /* This is a temporary buffer used to prepare a tty console write
1914 * so that we can easily avoid touching user space while holding the
1915 * console spinlock. It is allocated in con_init and is shared by
1916 * this code and the vc_screen read/write tty calls.
1918 * We have to allocate this statically in the kernel data section
1919 * since console_init (and thus con_init) are called before any
1920 * kernel memory allocation is available.
1922 char con_buf
[CON_BUF_SIZE
];
1923 DECLARE_MUTEX(con_buf_sem
);
1925 /* acquires console_sem */
1926 static int do_con_write(struct tty_struct
*tty
, const unsigned char *buf
, int count
)
1928 #ifdef VT_BUF_VRAM_ONLY
1929 #define FLUSH do { } while(0);
1931 #define FLUSH if (draw_x >= 0) { \
1932 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
1937 int c
, tc
, ok
, n
= 0, draw_x
= -1;
1938 unsigned int currcons
;
1939 unsigned long draw_from
= 0, draw_to
= 0;
1941 u16 himask
, charmask
;
1942 const unsigned char *orig_buf
= NULL
;
1950 acquire_console_sem();
1951 vc
= tty
->driver_data
;
1953 printk(KERN_ERR
"vt: argh, driver_data is NULL !\n");
1954 release_console_sem();
1958 currcons
= vc
->vc_num
;
1959 if (!vc_cons_allocated(currcons
)) {
1960 /* could this happen? */
1961 static int error
= 0;
1964 printk("con_write: tty %d not allocated\n", currcons
+1);
1966 release_console_sem();
1969 release_console_sem();
1974 /* At this point 'buf' is guaranteed to be a kernel buffer
1975 * and therefore no access to userspace (and therefore sleeping)
1976 * will be needed. The con_buf_sem serializes all tty based
1977 * console rendering and vcs write/read operations. We hold
1978 * the console spinlock during the entire write.
1981 acquire_console_sem();
1983 vc
= tty
->driver_data
;
1985 printk(KERN_ERR
"vt: argh, driver_data _became_ NULL !\n");
1986 release_console_sem();
1990 himask
= vc
->vc_hi_font_mask
;
1991 charmask
= himask
? 0x1ff : 0xff;
1993 /* undraw cursor first */
1997 while (!tty
->stopped
&& count
) {
2004 /* Do no translation at all in control states */
2005 if (vc
->vc_state
!= ESnormal
) {
2007 } else if (vc
->vc_utf
) {
2008 /* Combine UTF-8 into Unicode */
2009 /* Incomplete characters silently ignored */
2011 if (vc
->vc_utf_count
> 0 && (c
& 0xc0) == 0x80) {
2012 vc
->vc_utf_char
= (vc
->vc_utf_char
<< 6) | (c
& 0x3f);
2014 if (vc
->vc_utf_count
== 0)
2015 tc
= c
= vc
->vc_utf_char
;
2018 if ((c
& 0xe0) == 0xc0) {
2019 vc
->vc_utf_count
= 1;
2020 vc
->vc_utf_char
= (c
& 0x1f);
2021 } else if ((c
& 0xf0) == 0xe0) {
2022 vc
->vc_utf_count
= 2;
2023 vc
->vc_utf_char
= (c
& 0x0f);
2024 } else if ((c
& 0xf8) == 0xf0) {
2025 vc
->vc_utf_count
= 3;
2026 vc
->vc_utf_char
= (c
& 0x07);
2027 } else if ((c
& 0xfc) == 0xf8) {
2028 vc
->vc_utf_count
= 4;
2029 vc
->vc_utf_char
= (c
& 0x03);
2030 } else if ((c
& 0xfe) == 0xfc) {
2031 vc
->vc_utf_count
= 5;
2032 vc
->vc_utf_char
= (c
& 0x01);
2034 vc
->vc_utf_count
= 0;
2039 vc
->vc_utf_count
= 0;
2041 } else { /* no utf */
2042 tc
= vc
->vc_translate
[vc
->vc_toggle_meta
? (c
| 0x80) : c
];
2045 /* If the original code was a control character we
2046 * only allow a glyph to be displayed if the code is
2047 * not normally used (such as for cursor movement) or
2048 * if the disp_ctrl mode has been explicitly enabled.
2049 * Certain characters (as given by the CTRL_ALWAYS
2050 * bitmap) are always displayed as control characters,
2051 * as the console would be pretty useless without
2052 * them; to display an arbitrary font position use the
2053 * direct-to-font zone in UTF-8 mode.
2055 ok
= tc
&& (c
>= 32 ||
2056 (!vc
->vc_utf
&& !(((vc
->vc_disp_ctrl
? CTRL_ALWAYS
2057 : CTRL_ACTION
) >> c
) & 1)))
2058 && (c
!= 127 || vc
->vc_disp_ctrl
)
2061 if (vc
->vc_state
== ESnormal
&& ok
) {
2062 /* Now try to find out how to display it */
2063 tc
= conv_uni_to_pc(vc
, tc
);
2065 /* If we got -4 (not found) then see if we have
2066 defined a replacement character (U+FFFD) */
2067 tc
= conv_uni_to_pc(vc
, 0xfffd);
2069 /* One reason for the -4 can be that we just
2070 did a clear_unimap();
2071 try at least to show something. */
2074 } else if ( tc
== -3 ) {
2075 /* Bad hash table -- hope for the best */
2079 continue; /* Conversion failed */
2081 if (vc
->vc_need_wrap
|| vc
->vc_decim
)
2083 if (vc
->vc_need_wrap
) {
2090 ((vc
->vc_attr
<< 8) & ~himask
) + ((tc
& 0x100) ? himask
: 0) + (tc
& 0xff) :
2091 (vc
->vc_attr
<< 8) + tc
,
2092 (u16
*) vc
->vc_pos
);
2093 if (DO_UPDATE(vc
) && draw_x
< 0) {
2095 draw_from
= vc
->vc_pos
;
2097 if (vc
->vc_x
== vc
->vc_cols
- 1) {
2098 vc
->vc_need_wrap
= vc
->vc_decawm
;
2099 draw_to
= vc
->vc_pos
+ 2;
2102 draw_to
= (vc
->vc_pos
+= 2);
2107 do_con_trol(tty
, vc
, orig
);
2110 console_conditional_schedule();
2111 release_console_sem();
2119 * This is the console switching callback.
2121 * Doing console switching in a process context allows
2122 * us to do the switches asynchronously (needed when we want
2123 * to switch due to a keyboard interrupt). Synchronization
2124 * with other console code and prevention of re-entrancy is
2125 * ensured with console_sem.
2127 static void console_callback(void *ignored
)
2129 acquire_console_sem();
2131 if (want_console
>= 0) {
2132 if (want_console
!= fg_console
&&
2133 vc_cons_allocated(want_console
)) {
2134 hide_cursor(vc_cons
[fg_console
].d
);
2135 change_console(vc_cons
[want_console
].d
);
2136 /* we only changed when the console had already
2137 been allocated - a new console is not created
2138 in an interrupt routine */
2142 if (do_poke_blanked_console
) { /* do not unblank for a LED change */
2143 do_poke_blanked_console
= 0;
2144 poke_blanked_console();
2146 if (scrollback_delta
) {
2147 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
2149 if (vc
->vc_mode
== KD_TEXT
)
2150 vc
->vc_sw
->con_scrolldelta(vc
, scrollback_delta
);
2151 scrollback_delta
= 0;
2153 if (blank_timer_expired
) {
2155 blank_timer_expired
= 0;
2158 release_console_sem();
2161 void set_console(int nr
)
2164 schedule_console_callback();
2167 struct tty_driver
*console_driver
;
2169 #ifdef CONFIG_VT_CONSOLE
2172 * Console on virtual terminal
2174 * The console must be locked when we get here.
2177 static void vt_console_print(struct console
*co
, const char *b
, unsigned count
)
2179 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
2181 static unsigned long printing
;
2182 const ushort
*start
;
2186 /* console busy or not yet initialized */
2187 if (!printable
|| test_and_set_bit(0, &printing
))
2190 if (kmsg_redirect
&& vc_cons_allocated(kmsg_redirect
- 1))
2191 vc
= vc_cons
[kmsg_redirect
- 1].d
;
2193 /* read `x' only after setting currcons properly (otherwise
2194 the `x' macro will read the x of the foreground console). */
2197 if (!vc_cons_allocated(fg_console
)) {
2199 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2203 if (vc
->vc_mode
!= KD_TEXT
)
2206 /* undraw cursor first */
2210 start
= (ushort
*)vc
->vc_pos
;
2212 /* Contrived structure to try to emulate original need_wrap behaviour
2213 * Problems caused when we have need_wrap set on '\n' character */
2216 if (c
== 10 || c
== 13 || c
== 8 || vc
->vc_need_wrap
) {
2218 if (CON_IS_VISIBLE(vc
))
2219 vc
->vc_sw
->con_putcs(vc
, start
, cnt
, vc
->vc_y
, vc
->vc_x
);
2221 if (vc
->vc_need_wrap
)
2225 if (c
== 8) { /* backspace */
2227 start
= (ushort
*)vc
->vc_pos
;
2234 start
= (ushort
*)vc
->vc_pos
;
2236 if (c
== 10 || c
== 13)
2239 scr_writew((vc
->vc_attr
<< 8) + c
, (unsigned short *)vc
->vc_pos
);
2241 if (myx
== vc
->vc_cols
- 1) {
2242 vc
->vc_need_wrap
= 1;
2249 if (CON_IS_VISIBLE(vc
))
2250 vc
->vc_sw
->con_putcs(vc
, start
, cnt
, vc
->vc_y
, vc
->vc_x
);
2252 if (vc
->vc_x
== vc
->vc_cols
) {
2254 vc
->vc_need_wrap
= 1;
2260 clear_bit(0, &printing
);
2263 static struct tty_driver
*vt_console_device(struct console
*c
, int *index
)
2265 *index
= c
->index
? c
->index
-1 : fg_console
;
2266 return console_driver
;
2269 static struct console vt_console_driver
= {
2271 .write
= vt_console_print
,
2272 .device
= vt_console_device
,
2273 .unblank
= unblank_screen
,
2274 .flags
= CON_PRINTBUFFER
,
2280 * Handling of Linux-specific VC ioctls
2284 * Generally a bit racy with respect to console_sem().
2286 * There are some functions which don't need it.
2288 * There are some functions which can sleep for arbitrary periods
2289 * (paste_selection) but we don't need the lock there anyway.
2291 * set_selection has locking, and definitely needs it
2294 int tioclinux(struct tty_struct
*tty
, unsigned long arg
)
2297 char __user
*p
= (char __user
*)arg
;
2301 if (tty
->driver
->type
!= TTY_DRIVER_TYPE_CONSOLE
)
2303 if (current
->signal
->tty
!= tty
&& !capable(CAP_SYS_ADMIN
))
2305 if (get_user(type
, p
))
2311 acquire_console_sem();
2312 ret
= set_selection((struct tiocl_selection __user
*)(p
+1), tty
);
2313 release_console_sem();
2315 case TIOCL_PASTESEL
:
2316 ret
= paste_selection(tty
);
2318 case TIOCL_UNBLANKSCREEN
:
2319 acquire_console_sem();
2321 release_console_sem();
2323 case TIOCL_SELLOADLUT
:
2324 ret
= sel_loadlut(p
);
2326 case TIOCL_GETSHIFTSTATE
:
2329 * Make it possible to react to Shift+Mousebutton.
2330 * Note that 'shift_state' is an undocumented
2331 * kernel-internal variable; programs not closely
2332 * related to the kernel should not use this.
2335 ret
= __put_user(data
, p
);
2337 case TIOCL_GETMOUSEREPORTING
:
2338 data
= mouse_reporting();
2339 ret
= __put_user(data
, p
);
2341 case TIOCL_SETVESABLANK
:
2342 set_vesa_blanking(p
);
2344 case TIOCL_GETKMSGREDIRECT
:
2345 data
= kmsg_redirect
;
2346 ret
= __put_user(data
, p
);
2348 case TIOCL_SETKMSGREDIRECT
:
2349 if (!capable(CAP_SYS_ADMIN
)) {
2352 if (get_user(data
, p
+1))
2355 kmsg_redirect
= data
;
2358 case TIOCL_GETFGCONSOLE
:
2361 case TIOCL_SCROLLCONSOLE
:
2362 if (get_user(lines
, (s32 __user
*)(p
+4))) {
2365 scrollfront(vc_cons
[fg_console
].d
, lines
);
2369 case TIOCL_BLANKSCREEN
: /* until explicitly unblanked, not only poked */
2370 acquire_console_sem();
2373 release_console_sem();
2375 case TIOCL_BLANKEDSCREEN
:
2376 ret
= console_blanked
;
2386 * /dev/ttyN handling
2389 static int con_write(struct tty_struct
*tty
, const unsigned char *buf
, int count
)
2393 retval
= do_con_write(tty
, buf
, count
);
2394 con_flush_chars(tty
);
2399 static void con_put_char(struct tty_struct
*tty
, unsigned char ch
)
2402 return; /* n_r3964 calls put_char() from interrupt context */
2403 do_con_write(tty
, &ch
, 1);
2406 static int con_write_room(struct tty_struct
*tty
)
2410 return 4096; /* No limit, really; we're not buffering */
2413 static int con_chars_in_buffer(struct tty_struct
*tty
)
2415 return 0; /* we're not buffering */
2419 * con_throttle and con_unthrottle are only used for
2420 * paste_selection(), which has to stuff in a large number of
2423 static void con_throttle(struct tty_struct
*tty
)
2427 static void con_unthrottle(struct tty_struct
*tty
)
2429 struct vc_data
*vc
= tty
->driver_data
;
2431 wake_up_interruptible(&vc
->paste_wait
);
2435 * Turn the Scroll-Lock LED on when the tty is stopped
2437 static void con_stop(struct tty_struct
*tty
)
2442 console_num
= tty
->index
;
2443 if (!vc_cons_allocated(console_num
))
2445 set_vc_kbd_led(kbd_table
+ console_num
, VC_SCROLLOCK
);
2450 * Turn the Scroll-Lock LED off when the console is started
2452 static void con_start(struct tty_struct
*tty
)
2457 console_num
= tty
->index
;
2458 if (!vc_cons_allocated(console_num
))
2460 clr_vc_kbd_led(kbd_table
+ console_num
, VC_SCROLLOCK
);
2464 static void con_flush_chars(struct tty_struct
*tty
)
2468 if (in_interrupt()) /* from flush_to_ldisc */
2471 /* if we race with con_close(), vt may be null */
2472 acquire_console_sem();
2473 vc
= tty
->driver_data
;
2476 release_console_sem();
2480 * Allocate the console screen memory.
2482 static int con_open(struct tty_struct
*tty
, struct file
*filp
)
2484 unsigned int currcons
= tty
->index
;
2487 acquire_console_sem();
2488 if (tty
->driver_data
== NULL
) {
2489 ret
= vc_allocate(currcons
);
2491 struct vc_data
*vc
= vc_cons
[currcons
].d
;
2492 tty
->driver_data
= vc
;
2495 if (!tty
->winsize
.ws_row
&& !tty
->winsize
.ws_col
) {
2496 tty
->winsize
.ws_row
= vc_cons
[currcons
].d
->vc_rows
;
2497 tty
->winsize
.ws_col
= vc_cons
[currcons
].d
->vc_cols
;
2499 release_console_sem();
2500 vcs_make_devfs(tty
);
2504 release_console_sem();
2509 * We take tty_mutex in here to prevent another thread from coming in via init_dev
2510 * and taking a ref against the tty while we're in the process of forgetting
2511 * about it and cleaning things up.
2513 * This is because vcs_remove_devfs() can sleep and will drop the BKL.
2515 static void con_close(struct tty_struct
*tty
, struct file
*filp
)
2517 mutex_lock(&tty_mutex
);
2518 acquire_console_sem();
2519 if (tty
&& tty
->count
== 1) {
2520 struct vc_data
*vc
= tty
->driver_data
;
2524 tty
->driver_data
= NULL
;
2525 release_console_sem();
2526 vcs_remove_devfs(tty
);
2527 mutex_unlock(&tty_mutex
);
2529 * tty_mutex is released, but we still hold BKL, so there is
2530 * still exclusion against init_dev()
2534 release_console_sem();
2535 mutex_unlock(&tty_mutex
);
2538 static void vc_init(struct vc_data
*vc
, unsigned int rows
,
2539 unsigned int cols
, int do_clear
)
2545 vc
->vc_size_row
= cols
<< 1;
2546 vc
->vc_screenbuf_size
= vc
->vc_rows
* vc
->vc_size_row
;
2549 vc
->vc_pos
= vc
->vc_origin
;
2551 for (j
=k
=0; j
<16; j
++) {
2552 vc
->vc_palette
[k
++] = default_red
[j
] ;
2553 vc
->vc_palette
[k
++] = default_grn
[j
] ;
2554 vc
->vc_palette
[k
++] = default_blu
[j
] ;
2556 vc
->vc_def_color
= 0x07; /* white */
2557 vc
->vc_ulcolor
= 0x0f; /* bold white */
2558 vc
->vc_halfcolor
= 0x08; /* grey */
2559 init_waitqueue_head(&vc
->paste_wait
);
2560 reset_terminal(vc
, do_clear
);
2564 * This routine initializes console interrupts, and does nothing
2565 * else. If you want the screen to clear, call tty_write with
2566 * the appropriate escape-sequence.
2569 static int __init
con_init(void)
2571 const char *display_desc
= NULL
;
2573 unsigned int currcons
= 0, i
;
2575 acquire_console_sem();
2578 display_desc
= conswitchp
->con_startup();
2579 if (!display_desc
) {
2581 release_console_sem();
2585 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
2586 struct con_driver
*con_driver
= ®istered_con_driver
[i
];
2588 if (con_driver
->con
== NULL
) {
2589 con_driver
->con
= conswitchp
;
2590 con_driver
->desc
= display_desc
;
2591 con_driver
->flag
= CON_DRIVER_FLAG_INIT
;
2592 con_driver
->first
= 0;
2593 con_driver
->last
= MAX_NR_CONSOLES
- 1;
2598 for (i
= 0; i
< MAX_NR_CONSOLES
; i
++)
2599 con_driver_map
[i
] = conswitchp
;
2601 init_timer(&console_timer
);
2602 console_timer
.function
= blank_screen_t
;
2603 if (blankinterval
) {
2604 blank_state
= blank_normal_wait
;
2605 mod_timer(&console_timer
, jiffies
+ blankinterval
);
2609 * kmalloc is not running yet - we use the bootmem allocator.
2611 for (currcons
= 0; currcons
< MIN_NR_CONSOLES
; currcons
++) {
2612 vc_cons
[currcons
].d
= vc
= alloc_bootmem(sizeof(struct vc_data
));
2613 visual_init(vc
, currcons
, 1);
2614 vc
->vc_screenbuf
= (unsigned short *)alloc_bootmem(vc
->vc_screenbuf_size
);
2615 vc
->vc_kmalloced
= 0;
2616 vc_init(vc
, vc
->vc_rows
, vc
->vc_cols
,
2617 currcons
|| !vc
->vc_sw
->con_save_screen
);
2619 currcons
= fg_console
= 0;
2620 master_display_fg
= vc
= vc_cons
[currcons
].d
;
2623 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
);
2626 printk("Console: %s %s %dx%d",
2627 vc
->vc_can_do_color
? "colour" : "mono",
2628 display_desc
, vc
->vc_cols
, vc
->vc_rows
);
2632 release_console_sem();
2634 #ifdef CONFIG_VT_CONSOLE
2635 register_console(&vt_console_driver
);
2639 console_initcall(con_init
);
2641 static struct tty_operations con_ops
= {
2645 .write_room
= con_write_room
,
2646 .put_char
= con_put_char
,
2647 .flush_chars
= con_flush_chars
,
2648 .chars_in_buffer
= con_chars_in_buffer
,
2652 .throttle
= con_throttle
,
2653 .unthrottle
= con_unthrottle
,
2656 int __init
vty_init(void)
2660 console_driver
= alloc_tty_driver(MAX_NR_CONSOLES
);
2661 if (!console_driver
)
2662 panic("Couldn't allocate console driver\n");
2663 console_driver
->owner
= THIS_MODULE
;
2664 console_driver
->name
= "tty";
2665 console_driver
->name_base
= 1;
2666 console_driver
->major
= TTY_MAJOR
;
2667 console_driver
->minor_start
= 1;
2668 console_driver
->type
= TTY_DRIVER_TYPE_CONSOLE
;
2669 console_driver
->init_termios
= tty_std_termios
;
2670 console_driver
->flags
= TTY_DRIVER_REAL_RAW
| TTY_DRIVER_RESET_TERMIOS
;
2671 tty_set_operations(console_driver
, &con_ops
);
2672 if (tty_register_driver(console_driver
))
2673 panic("Couldn't register console driver\n");
2677 #ifdef CONFIG_PROM_CONSOLE
2680 #ifdef CONFIG_MDA_CONSOLE
2686 #ifndef VT_SINGLE_DRIVER
2687 #include <linux/device.h>
2689 static struct class *vtconsole_class
;
2691 static int bind_con_driver(const struct consw
*csw
, int first
, int last
,
2694 struct module
*owner
= csw
->owner
;
2695 const char *desc
= NULL
;
2696 struct con_driver
*con_driver
;
2697 int i
, j
= -1, k
= -1, retval
= -ENODEV
;
2699 if (!try_module_get(owner
))
2702 acquire_console_sem();
2704 /* check if driver is registered */
2705 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
2706 con_driver
= ®istered_con_driver
[i
];
2708 if (con_driver
->con
== csw
) {
2709 desc
= con_driver
->desc
;
2718 if (!(con_driver
->flag
& CON_DRIVER_FLAG_INIT
)) {
2720 con_driver
->flag
|= CON_DRIVER_FLAG_INIT
;
2725 module_put(conswitchp
->owner
);
2727 __module_get(owner
);
2731 first
= max(first
, con_driver
->first
);
2732 last
= min(last
, con_driver
->last
);
2734 for (i
= first
; i
<= last
; i
++) {
2736 struct vc_data
*vc
= vc_cons
[i
].d
;
2738 if (con_driver_map
[i
])
2739 module_put(con_driver_map
[i
]->owner
);
2740 __module_get(owner
);
2741 con_driver_map
[i
] = csw
;
2743 if (!vc
|| !vc
->vc_sw
)
2748 if (CON_IS_VISIBLE(vc
)) {
2753 old_was_color
= vc
->vc_can_do_color
;
2754 vc
->vc_sw
->con_deinit(vc
);
2755 vc
->vc_origin
= (unsigned long)vc
->vc_screenbuf
;
2756 visual_init(vc
, i
, 0);
2760 /* If the console changed between mono <-> color, then
2761 * the attributes in the screenbuf will be wrong. The
2762 * following resets all attributes to something sane.
2764 if (old_was_color
!= vc
->vc_can_do_color
)
2765 clear_buffer_attributes(vc
);
2768 printk("Console: switching ");
2770 printk("consoles %d-%d ", first
+1, last
+1);
2772 struct vc_data
*vc
= vc_cons
[j
].d
;
2774 printk("to %s %s %dx%d\n",
2775 vc
->vc_can_do_color
? "colour" : "mono",
2776 desc
, vc
->vc_cols
, vc
->vc_rows
);
2783 printk("to %s\n", desc
);
2787 release_console_sem();
2792 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
2793 static int con_is_graphics(const struct consw
*csw
, int first
, int last
)
2797 for (i
= first
; i
<= last
; i
++) {
2798 struct vc_data
*vc
= vc_cons
[i
].d
;
2800 if (vc
&& vc
->vc_mode
== KD_GRAPHICS
) {
2809 static int unbind_con_driver(const struct consw
*csw
, int first
, int last
,
2812 struct module
*owner
= csw
->owner
;
2813 const struct consw
*defcsw
= NULL
;
2814 struct con_driver
*con_driver
= NULL
, *con_back
= NULL
;
2815 int i
, retval
= -ENODEV
;
2817 if (!try_module_get(owner
))
2820 acquire_console_sem();
2822 /* check if driver is registered and if it is unbindable */
2823 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
2824 con_driver
= ®istered_con_driver
[i
];
2826 if (con_driver
->con
== csw
&&
2827 con_driver
->flag
& CON_DRIVER_FLAG_MODULE
) {
2834 release_console_sem();
2840 /* check if backup driver exists */
2841 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
2842 con_back
= ®istered_con_driver
[i
];
2844 if (con_back
->con
&&
2845 !(con_back
->flag
& CON_DRIVER_FLAG_MODULE
)) {
2846 defcsw
= con_back
->con
;
2853 release_console_sem();
2857 if (!con_is_bound(csw
)) {
2858 release_console_sem();
2862 first
= max(first
, con_driver
->first
);
2863 last
= min(last
, con_driver
->last
);
2865 for (i
= first
; i
<= last
; i
++) {
2866 if (con_driver_map
[i
] == csw
) {
2867 module_put(csw
->owner
);
2868 con_driver_map
[i
] = NULL
;
2872 if (!con_is_bound(defcsw
)) {
2873 const struct consw
*defconsw
= conswitchp
;
2875 defcsw
->con_startup();
2876 con_back
->flag
|= CON_DRIVER_FLAG_INIT
;
2878 * vgacon may change the default driver to point
2879 * to dummycon, we restore it here...
2881 conswitchp
= defconsw
;
2884 if (!con_is_bound(csw
))
2885 con_driver
->flag
&= ~CON_DRIVER_FLAG_INIT
;
2887 release_console_sem();
2888 /* ignore return value, binding should not fail */
2889 bind_con_driver(defcsw
, first
, last
, deflt
);
2896 static int vt_bind(struct con_driver
*con
)
2898 const struct consw
*defcsw
= NULL
, *csw
= NULL
;
2899 int i
, more
= 1, first
= -1, last
= -1, deflt
= 0;
2901 if (!con
->con
|| !(con
->flag
& CON_DRIVER_FLAG_MODULE
) ||
2902 con_is_graphics(con
->con
, con
->first
, con
->last
))
2907 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
2908 struct con_driver
*con
= ®istered_con_driver
[i
];
2910 if (con
->con
&& !(con
->flag
& CON_DRIVER_FLAG_MODULE
)) {
2922 for (i
= con
->first
; i
<= con
->last
; i
++) {
2923 if (con_driver_map
[i
] == defcsw
) {
2928 } else if (first
!= -1)
2932 if (first
== 0 && last
== MAX_NR_CONSOLES
-1)
2936 bind_con_driver(csw
, first
, last
, deflt
);
2947 static int vt_unbind(struct con_driver
*con
)
2949 const struct consw
*csw
= NULL
;
2950 int i
, more
= 1, first
= -1, last
= -1, deflt
= 0;
2952 if (!con
->con
|| !(con
->flag
& CON_DRIVER_FLAG_MODULE
) ||
2953 con_is_graphics(con
->con
, con
->first
, con
->last
))
2961 for (i
= con
->first
; i
<= con
->last
; i
++) {
2962 if (con_driver_map
[i
] == csw
) {
2967 } else if (first
!= -1)
2971 if (first
== 0 && last
== MAX_NR_CONSOLES
-1)
2975 unbind_con_driver(csw
, first
, last
, deflt
);
2986 static inline int vt_bind(struct con_driver
*con
)
2990 static inline int vt_unbind(struct con_driver
*con
)
2994 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
2996 static ssize_t
store_bind(struct class_device
*class_device
,
2997 const char *buf
, size_t count
)
2999 struct con_driver
*con
= class_get_devdata(class_device
);
3000 int bind
= simple_strtoul(buf
, NULL
, 0);
3010 static ssize_t
show_bind(struct class_device
*class_device
, char *buf
)
3012 struct con_driver
*con
= class_get_devdata(class_device
);
3013 int bind
= con_is_bound(con
->con
);
3015 return snprintf(buf
, PAGE_SIZE
, "%i\n", bind
);
3018 static ssize_t
show_name(struct class_device
*class_device
, char *buf
)
3020 struct con_driver
*con
= class_get_devdata(class_device
);
3022 return snprintf(buf
, PAGE_SIZE
, "%s %s\n",
3023 (con
->flag
& CON_DRIVER_FLAG_MODULE
) ? "(M)" : "(S)",
3028 static struct class_device_attribute class_device_attrs
[] = {
3029 __ATTR(bind
, S_IRUGO
|S_IWUSR
, show_bind
, store_bind
),
3030 __ATTR(name
, S_IRUGO
, show_name
, NULL
),
3033 static int vtconsole_init_class_device(struct con_driver
*con
)
3037 class_set_devdata(con
->class_dev
, con
);
3038 for (i
= 0; i
< ARRAY_SIZE(class_device_attrs
); i
++)
3039 class_device_create_file(con
->class_dev
,
3040 &class_device_attrs
[i
]);
3045 static void vtconsole_deinit_class_device(struct con_driver
*con
)
3049 for (i
= 0; i
< ARRAY_SIZE(class_device_attrs
); i
++)
3050 class_device_remove_file(con
->class_dev
,
3051 &class_device_attrs
[i
]);
3055 * con_is_bound - checks if driver is bound to the console
3056 * @csw: console driver
3058 * RETURNS: zero if unbound, nonzero if bound
3060 * Drivers can call this and if zero, they should release
3061 * all resources allocated on con_startup()
3063 int con_is_bound(const struct consw
*csw
)
3067 for (i
= 0; i
< MAX_NR_CONSOLES
; i
++) {
3068 if (con_driver_map
[i
] == csw
) {
3076 EXPORT_SYMBOL(con_is_bound
);
3079 * register_con_driver - register console driver to console layer
3080 * @csw: console driver
3081 * @first: the first console to take over, minimum value is 0
3082 * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1
3084 * DESCRIPTION: This function registers a console driver which can later
3085 * bind to a range of consoles specified by @first and @last. It will
3086 * also initialize the console driver by calling con_startup().
3088 int register_con_driver(const struct consw
*csw
, int first
, int last
)
3090 struct module
*owner
= csw
->owner
;
3091 struct con_driver
*con_driver
;
3095 if (!try_module_get(owner
))
3098 acquire_console_sem();
3100 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3101 con_driver
= ®istered_con_driver
[i
];
3103 /* already registered */
3104 if (con_driver
->con
== csw
)
3111 desc
= csw
->con_startup();
3118 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3119 con_driver
= ®istered_con_driver
[i
];
3121 if (con_driver
->con
== NULL
) {
3122 con_driver
->con
= csw
;
3123 con_driver
->desc
= desc
;
3124 con_driver
->node
= i
;
3125 con_driver
->flag
= CON_DRIVER_FLAG_MODULE
|
3126 CON_DRIVER_FLAG_INIT
;
3127 con_driver
->first
= first
;
3128 con_driver
->last
= last
;
3137 con_driver
->class_dev
= class_device_create(vtconsole_class
, NULL
,
3138 MKDEV(0, con_driver
->node
),
3142 if (IS_ERR(con_driver
->class_dev
)) {
3143 printk(KERN_WARNING
"Unable to create class_device for %s; "
3144 "errno = %ld\n", con_driver
->desc
,
3145 PTR_ERR(con_driver
->class_dev
));
3146 con_driver
->class_dev
= NULL
;
3148 vtconsole_init_class_device(con_driver
);
3151 release_console_sem();
3155 EXPORT_SYMBOL(register_con_driver
);
3158 * unregister_con_driver - unregister console driver from console layer
3159 * @csw: console driver
3161 * DESCRIPTION: All drivers that registers to the console layer must
3162 * call this function upon exit, or if the console driver is in a state
3163 * where it won't be able to handle console services, such as the
3164 * framebuffer console without loaded framebuffer drivers.
3166 * The driver must unbind first prior to unregistration.
3168 int unregister_con_driver(const struct consw
*csw
)
3170 int i
, retval
= -ENODEV
;
3172 acquire_console_sem();
3174 /* cannot unregister a bound driver */
3175 if (con_is_bound(csw
))
3178 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3179 struct con_driver
*con_driver
= ®istered_con_driver
[i
];
3181 if (con_driver
->con
== csw
&&
3182 con_driver
->flag
& CON_DRIVER_FLAG_MODULE
) {
3183 vtconsole_deinit_class_device(con_driver
);
3184 class_device_destroy(vtconsole_class
,
3185 MKDEV(0, con_driver
->node
));
3186 con_driver
->con
= NULL
;
3187 con_driver
->desc
= NULL
;
3188 con_driver
->class_dev
= NULL
;
3189 con_driver
->node
= 0;
3190 con_driver
->flag
= 0;
3191 con_driver
->first
= 0;
3192 con_driver
->last
= 0;
3198 release_console_sem();
3201 EXPORT_SYMBOL(unregister_con_driver
);
3204 * If we support more console drivers, this function is used
3205 * when a driver wants to take over some existing consoles
3206 * and become default driver for newly opened ones.
3208 * take_over_console is basically a register followed by unbind
3210 int take_over_console(const struct consw
*csw
, int first
, int last
, int deflt
)
3214 err
= register_con_driver(csw
, first
, last
);
3217 bind_con_driver(csw
, first
, last
, deflt
);
3223 * give_up_console is a wrapper to unregister_con_driver. It will only
3224 * work if driver is fully unbound.
3226 void give_up_console(const struct consw
*csw
)
3228 unregister_con_driver(csw
);
3231 static int __init
vtconsole_class_init(void)
3235 vtconsole_class
= class_create(THIS_MODULE
, "vtconsole");
3236 if (IS_ERR(vtconsole_class
)) {
3237 printk(KERN_WARNING
"Unable to create vt console class; "
3238 "errno = %ld\n", PTR_ERR(vtconsole_class
));
3239 vtconsole_class
= NULL
;
3242 /* Add system drivers to sysfs */
3243 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3244 struct con_driver
*con
= ®istered_con_driver
[i
];
3246 if (con
->con
&& !con
->class_dev
) {
3248 class_device_create(vtconsole_class
, NULL
,
3249 MKDEV(0, con
->node
), NULL
,
3250 "vtcon%i", con
->node
);
3252 if (IS_ERR(con
->class_dev
)) {
3253 printk(KERN_WARNING
"Unable to create "
3254 "class_device for %s; errno = %ld\n",
3255 con
->desc
, PTR_ERR(con
->class_dev
));
3256 con
->class_dev
= NULL
;
3258 vtconsole_init_class_device(con
);
3265 postcore_initcall(vtconsole_class_init
);
3273 static void set_vesa_blanking(char __user
*p
)
3276 get_user(mode
, p
+ 1);
3277 vesa_blank_mode
= (mode
< 4) ? mode
: 0;
3280 void do_blank_screen(int entering_gfx
)
3282 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
3285 WARN_CONSOLE_UNLOCKED();
3287 if (console_blanked
) {
3288 if (blank_state
== blank_vesa_wait
) {
3289 blank_state
= blank_off
;
3290 vc
->vc_sw
->con_blank(vc
, vesa_blank_mode
+ 1, 0);
3294 if (blank_state
!= blank_normal_wait
)
3296 blank_state
= blank_off
;
3298 /* entering graphics mode? */
3302 vc
->vc_sw
->con_blank(vc
, -1, 1);
3303 console_blanked
= fg_console
+ 1;
3308 /* don't blank graphics */
3309 if (vc
->vc_mode
!= KD_TEXT
) {
3310 console_blanked
= fg_console
+ 1;
3315 del_timer_sync(&console_timer
);
3316 blank_timer_expired
= 0;
3319 /* In case we need to reset origin, blanking hook returns 1 */
3320 i
= vc
->vc_sw
->con_blank(vc
, vesa_off_interval
? 1 : (vesa_blank_mode
+ 1), 0);
3321 console_blanked
= fg_console
+ 1;
3325 if (console_blank_hook
&& console_blank_hook(1))
3328 if (vesa_off_interval
&& vesa_blank_mode
) {
3329 blank_state
= blank_vesa_wait
;
3330 mod_timer(&console_timer
, jiffies
+ vesa_off_interval
);
3333 EXPORT_SYMBOL(do_blank_screen
);
3336 * Called by timer as well as from vt_console_driver
3338 void do_unblank_screen(int leaving_gfx
)
3342 /* This should now always be called from a "sane" (read: can schedule)
3343 * context for the sake of the low level drivers, except in the special
3344 * case of oops_in_progress
3346 if (!oops_in_progress
)
3349 WARN_CONSOLE_UNLOCKED();
3352 if (!console_blanked
)
3354 if (!vc_cons_allocated(fg_console
)) {
3356 printk("unblank_screen: tty %d not allocated ??\n", fg_console
+1);
3359 vc
= vc_cons
[fg_console
].d
;
3360 if (vc
->vc_mode
!= KD_TEXT
)
3361 return; /* but leave console_blanked != 0 */
3363 if (blankinterval
) {
3364 mod_timer(&console_timer
, jiffies
+ blankinterval
);
3365 blank_state
= blank_normal_wait
;
3368 console_blanked
= 0;
3369 if (vc
->vc_sw
->con_blank(vc
, 0, leaving_gfx
))
3370 /* Low-level driver cannot restore -> do it ourselves */
3372 if (console_blank_hook
)
3373 console_blank_hook(0);
3377 EXPORT_SYMBOL(do_unblank_screen
);
3380 * This is called by the outside world to cause a forced unblank, mostly for
3381 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
3382 * call it with 1 as an argument and so force a mode restore... that may kill
3383 * X or at least garbage the screen but would also make the Oops visible...
3385 void unblank_screen(void)
3387 do_unblank_screen(0);
3391 * We defer the timer blanking to work queue so it can take the console mutex
3392 * (console operations can still happen at irq time, but only from printk which
3393 * has the console mutex. Not perfect yet, but better than no locking
3395 static void blank_screen_t(unsigned long dummy
)
3397 if (unlikely(!keventd_up())) {
3398 mod_timer(&console_timer
, jiffies
+ blankinterval
);
3401 blank_timer_expired
= 1;
3402 schedule_work(&console_work
);
3405 void poke_blanked_console(void)
3407 WARN_CONSOLE_UNLOCKED();
3409 /* Add this so we quickly catch whoever might call us in a non
3410 * safe context. Nowadays, unblank_screen() isn't to be called in
3411 * atomic contexts and is allowed to schedule (with the special case
3412 * of oops_in_progress, but that isn't of any concern for this
3417 /* This isn't perfectly race free, but a race here would be mostly harmless,
3418 * at worse, we'll do a spurrious blank and it's unlikely
3420 del_timer(&console_timer
);
3421 blank_timer_expired
= 0;
3423 if (ignore_poke
|| !vc_cons
[fg_console
].d
|| vc_cons
[fg_console
].d
->vc_mode
== KD_GRAPHICS
)
3425 if (console_blanked
)
3427 else if (blankinterval
) {
3428 mod_timer(&console_timer
, jiffies
+ blankinterval
);
3429 blank_state
= blank_normal_wait
;
3437 static void set_palette(struct vc_data
*vc
)
3439 WARN_CONSOLE_UNLOCKED();
3441 if (vc
->vc_mode
!= KD_GRAPHICS
)
3442 vc
->vc_sw
->con_set_palette(vc
, color_table
);
3445 static int set_get_cmap(unsigned char __user
*arg
, int set
)
3449 WARN_CONSOLE_UNLOCKED();
3451 for (i
= 0; i
< 16; i
++)
3453 get_user(default_red
[i
], arg
++);
3454 get_user(default_grn
[i
], arg
++);
3455 get_user(default_blu
[i
], arg
++);
3457 put_user(default_red
[i
], arg
++);
3458 put_user(default_grn
[i
], arg
++);
3459 put_user(default_blu
[i
], arg
++);
3462 for (i
= 0; i
< MAX_NR_CONSOLES
; i
++)
3463 if (vc_cons_allocated(i
)) {
3464 for (j
= k
= 0; j
< 16; j
++) {
3465 vc_cons
[i
].d
->vc_palette
[k
++] = default_red
[j
];
3466 vc_cons
[i
].d
->vc_palette
[k
++] = default_grn
[j
];
3467 vc_cons
[i
].d
->vc_palette
[k
++] = default_blu
[j
];
3469 set_palette(vc_cons
[i
].d
);
3476 * Load palette into the DAC registers. arg points to a colour
3477 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
3480 int con_set_cmap(unsigned char __user
*arg
)
3484 acquire_console_sem();
3485 rc
= set_get_cmap (arg
,1);
3486 release_console_sem();
3491 int con_get_cmap(unsigned char __user
*arg
)
3495 acquire_console_sem();
3496 rc
= set_get_cmap (arg
,0);
3497 release_console_sem();
3502 void reset_palette(struct vc_data
*vc
)
3505 for (j
=k
=0; j
<16; j
++) {
3506 vc
->vc_palette
[k
++] = default_red
[j
];
3507 vc
->vc_palette
[k
++] = default_grn
[j
];
3508 vc
->vc_palette
[k
++] = default_blu
[j
];
3516 * Currently we only support fonts up to 32 pixels wide, at a maximum height
3517 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
3518 * depending on width) reserved for each character which is kinda wasty, but
3519 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
3520 * is upto the actual low-level console-driver convert data into its favorite
3521 * format (maybe we should add a `fontoffset' field to the `display'
3522 * structure so we won't have to convert the fontdata all the time.
3526 #define max_font_size 65536
3528 static int con_font_get(struct vc_data
*vc
, struct console_font_op
*op
)
3530 struct console_font font
;
3534 if (vc
->vc_mode
!= KD_TEXT
)
3538 font
.data
= kmalloc(max_font_size
, GFP_KERNEL
);
3544 acquire_console_sem();
3545 if (vc
->vc_sw
->con_font_get
)
3546 rc
= vc
->vc_sw
->con_font_get(vc
, &font
);
3549 release_console_sem();
3554 c
= (font
.width
+7)/8 * 32 * font
.charcount
;
3556 if (op
->data
&& font
.charcount
> op
->charcount
)
3558 if (!(op
->flags
& KD_FONT_FLAG_OLD
)) {
3559 if (font
.width
> op
->width
|| font
.height
> op
->height
)
3562 if (font
.width
!= 8)
3564 else if ((op
->height
&& font
.height
> op
->height
) ||
3571 op
->height
= font
.height
;
3572 op
->width
= font
.width
;
3573 op
->charcount
= font
.charcount
;
3575 if (op
->data
&& copy_to_user(op
->data
, font
.data
, c
))
3583 static int con_font_set(struct vc_data
*vc
, struct console_font_op
*op
)
3585 struct console_font font
;
3589 if (vc
->vc_mode
!= KD_TEXT
)
3593 if (op
->charcount
> 512)
3595 if (!op
->height
) { /* Need to guess font height [compat] */
3597 u8 __user
*charmap
= op
->data
;
3600 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
3601 so that we can get rid of this soon */
3602 if (!(op
->flags
& KD_FONT_FLAG_OLD
))
3604 for (h
= 32; h
> 0; h
--)
3605 for (i
= 0; i
< op
->charcount
; i
++) {
3606 if (get_user(tmp
, &charmap
[32*i
+h
-1]))
3615 if (op
->width
<= 0 || op
->width
> 32 || op
->height
> 32)
3617 size
= (op
->width
+7)/8 * 32 * op
->charcount
;
3618 if (size
> max_font_size
)
3620 font
.charcount
= op
->charcount
;
3621 font
.height
= op
->height
;
3622 font
.width
= op
->width
;
3623 font
.data
= kmalloc(size
, GFP_KERNEL
);
3626 if (copy_from_user(font
.data
, op
->data
, size
)) {
3630 acquire_console_sem();
3631 if (vc
->vc_sw
->con_font_set
)
3632 rc
= vc
->vc_sw
->con_font_set(vc
, &font
, op
->flags
);
3635 release_console_sem();
3640 static int con_font_default(struct vc_data
*vc
, struct console_font_op
*op
)
3642 struct console_font font
= {.width
= op
->width
, .height
= op
->height
};
3643 char name
[MAX_FONT_NAME
];
3647 if (vc
->vc_mode
!= KD_TEXT
)
3652 else if (strncpy_from_user(name
, op
->data
, MAX_FONT_NAME
- 1) < 0)
3655 name
[MAX_FONT_NAME
- 1] = 0;
3657 acquire_console_sem();
3658 if (vc
->vc_sw
->con_font_default
)
3659 rc
= vc
->vc_sw
->con_font_default(vc
, &font
, s
);
3662 release_console_sem();
3664 op
->width
= font
.width
;
3665 op
->height
= font
.height
;
3670 static int con_font_copy(struct vc_data
*vc
, struct console_font_op
*op
)
3672 int con
= op
->height
;
3675 if (vc
->vc_mode
!= KD_TEXT
)
3678 acquire_console_sem();
3679 if (!vc
->vc_sw
->con_font_copy
)
3681 else if (con
< 0 || !vc_cons_allocated(con
))
3683 else if (con
== vc
->vc_num
) /* nothing to do */
3686 rc
= vc
->vc_sw
->con_font_copy(vc
, con
);
3687 release_console_sem();
3691 int con_font_op(struct vc_data
*vc
, struct console_font_op
*op
)
3694 case KD_FONT_OP_SET
:
3695 return con_font_set(vc
, op
);
3696 case KD_FONT_OP_GET
:
3697 return con_font_get(vc
, op
);
3698 case KD_FONT_OP_SET_DEFAULT
:
3699 return con_font_default(vc
, op
);
3700 case KD_FONT_OP_COPY
:
3701 return con_font_copy(vc
, op
);
3707 * Interface exported to selection and vcs.
3710 /* used by selection */
3711 u16
screen_glyph(struct vc_data
*vc
, int offset
)
3713 u16 w
= scr_readw(screenpos(vc
, offset
, 1));
3716 if (w
& vc
->vc_hi_font_mask
)
3721 /* used by vcs - note the word offset */
3722 unsigned short *screen_pos(struct vc_data
*vc
, int w_offset
, int viewed
)
3724 return screenpos(vc
, 2 * w_offset
, viewed
);
3727 void getconsxy(struct vc_data
*vc
, unsigned char *p
)
3733 void putconsxy(struct vc_data
*vc
, unsigned char *p
)
3736 gotoxy(vc
, p
[0], p
[1]);
3740 u16
vcs_scr_readw(struct vc_data
*vc
, const u16
*org
)
3742 if ((unsigned long)org
== vc
->vc_pos
&& softcursor_original
!= -1)
3743 return softcursor_original
;
3744 return scr_readw(org
);
3747 void vcs_scr_writew(struct vc_data
*vc
, u16 val
, u16
*org
)
3749 scr_writew(val
, org
);
3750 if ((unsigned long)org
== vc
->vc_pos
) {
3751 softcursor_original
= -1;
3757 * Visible symbols for modules
3760 EXPORT_SYMBOL(color_table
);
3761 EXPORT_SYMBOL(default_red
);
3762 EXPORT_SYMBOL(default_grn
);
3763 EXPORT_SYMBOL(default_blu
);
3764 EXPORT_SYMBOL(update_region
);
3765 EXPORT_SYMBOL(redraw_screen
);
3766 EXPORT_SYMBOL(vc_resize
);
3767 EXPORT_SYMBOL(fg_console
);
3768 EXPORT_SYMBOL(console_blank_hook
);
3769 EXPORT_SYMBOL(console_blanked
);
3770 EXPORT_SYMBOL(vc_cons
);
3771 #ifndef VT_SINGLE_DRIVER
3772 EXPORT_SYMBOL(take_over_console
);
3773 EXPORT_SYMBOL(give_up_console
);