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/devfs_fs_kernel.h>
83 #include <linux/vt_kern.h>
84 #include <linux/selection.h>
85 #include <linux/tiocl.h>
86 #include <linux/kbd_kern.h>
87 #include <linux/consolemap.h>
88 #include <linux/timer.h>
89 #include <linux/interrupt.h>
90 #include <linux/config.h>
91 #include <linux/workqueue.h>
92 #include <linux/bootmem.h>
94 #include <linux/font.h>
95 #include <linux/bitops.h>
98 #include <asm/system.h>
99 #include <asm/uaccess.h>
101 #define MAX_NR_CON_DRIVER 16
103 #define CON_DRIVER_FLAG_MODULE 1
104 #define CON_DRIVER_FLAG_INIT 2
107 const struct consw
*con
;
109 struct class_device
*class_dev
;
116 static struct con_driver registered_con_driver
[MAX_NR_CON_DRIVER
];
117 const struct consw
*conswitchp
;
119 /* A bitmap for codes <32. A bit of 1 indicates that the code
120 * corresponding to that bit number invokes some special action
121 * (such as cursor movement) and should not be displayed as a
122 * glyph unless the disp_ctrl mode is explicitly enabled.
124 #define CTRL_ACTION 0x0d00ff81
125 #define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */
128 * Here is the default bell parameters: 750HZ, 1/8th of a second
130 #define DEFAULT_BELL_PITCH 750
131 #define DEFAULT_BELL_DURATION (HZ/8)
133 extern void vcs_make_devfs(struct tty_struct
*tty
);
134 extern void vcs_remove_devfs(struct tty_struct
*tty
);
136 extern void console_map_init(void);
137 #ifdef CONFIG_PROM_CONSOLE
138 extern void prom_con_init(void);
140 #ifdef CONFIG_MDA_CONSOLE
141 extern int mda_console_init(void);
144 struct vc vc_cons
[MAX_NR_CONSOLES
];
146 #ifndef VT_SINGLE_DRIVER
147 static const struct consw
*con_driver_map
[MAX_NR_CONSOLES
];
150 static int con_open(struct tty_struct
*, struct file
*);
151 static void vc_init(struct vc_data
*vc
, unsigned int rows
,
152 unsigned int cols
, int do_clear
);
153 static void gotoxy(struct vc_data
*vc
, int new_x
, int new_y
);
154 static void save_cur(struct vc_data
*vc
);
155 static void reset_terminal(struct vc_data
*vc
, int do_clear
);
156 static void con_flush_chars(struct tty_struct
*tty
);
157 static void set_vesa_blanking(char __user
*p
);
158 static void set_cursor(struct vc_data
*vc
);
159 static void hide_cursor(struct vc_data
*vc
);
160 static void console_callback(void *ignored
);
161 static void blank_screen_t(unsigned long dummy
);
162 static void set_palette(struct vc_data
*vc
);
164 static int printable
; /* Is console ready for printing? */
167 * ignore_poke: don't unblank the screen when things are typed. This is
168 * mainly for the privacy of braille terminal users.
170 static int ignore_poke
;
172 int do_poke_blanked_console
;
175 static int vesa_blank_mode
; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
176 static int blankinterval
= 10*60*HZ
;
177 static int vesa_off_interval
;
179 static DECLARE_WORK(console_work
, console_callback
, NULL
);
182 * fg_console is the current virtual console,
183 * last_console is the last used one,
184 * want_console is the console we want to switch to,
185 * kmsg_redirect is the console for kernel messages,
189 int want_console
= -1;
193 * For each existing display, we have a pointer to console currently visible
194 * on that display, allowing consoles other than fg_console to be refreshed
195 * appropriately. Unless the low-level driver supplies its own display_fg
196 * variable, we use this one for the "master display".
198 static struct vc_data
*master_display_fg
;
201 * Unfortunately, we need to delay tty echo when we're currently writing to the
202 * console since the code is (and always was) not re-entrant, so we schedule
203 * all flip requests to process context with schedule-task() and run it from
204 * console_callback().
208 * For the same reason, we defer scrollback to the console callback.
210 static int scrollback_delta
;
213 * Hook so that the power management routines can (un)blank
214 * the console on our behalf.
216 int (*console_blank_hook
)(int);
218 static struct timer_list console_timer
;
219 static int blank_state
;
220 static int blank_timer_expired
;
228 * Low-Level Functions
231 #define IS_FG(vc) ((vc)->vc_num == fg_console)
233 #ifdef VT_BUF_VRAM_ONLY
234 #define DO_UPDATE(vc) 0
236 #define DO_UPDATE(vc) CON_IS_VISIBLE(vc)
239 static inline unsigned short *screenpos(struct vc_data
*vc
, int offset
, int viewed
)
244 p
= (unsigned short *)(vc
->vc_origin
+ offset
);
245 else if (!vc
->vc_sw
->con_screen_pos
)
246 p
= (unsigned short *)(vc
->vc_visible_origin
+ offset
);
248 p
= vc
->vc_sw
->con_screen_pos(vc
, offset
);
252 static inline void scrolldelta(int lines
)
254 scrollback_delta
+= lines
;
255 schedule_console_callback();
258 void schedule_console_callback(void)
260 schedule_work(&console_work
);
263 static void scrup(struct vc_data
*vc
, unsigned int t
, unsigned int b
, int nr
)
265 unsigned short *d
, *s
;
269 if (b
> vc
->vc_rows
|| t
>= b
|| nr
< 1)
271 if (CON_IS_VISIBLE(vc
) && vc
->vc_sw
->con_scroll(vc
, t
, b
, SM_UP
, nr
))
273 d
= (unsigned short *)(vc
->vc_origin
+ vc
->vc_size_row
* t
);
274 s
= (unsigned short *)(vc
->vc_origin
+ vc
->vc_size_row
* (t
+ nr
));
275 scr_memmovew(d
, s
, (b
- t
- nr
) * vc
->vc_size_row
);
276 scr_memsetw(d
+ (b
- t
- nr
) * vc
->vc_cols
, vc
->vc_video_erase_char
,
277 vc
->vc_size_row
* nr
);
280 static void scrdown(struct vc_data
*vc
, unsigned int t
, unsigned int b
, int nr
)
287 if (b
> vc
->vc_rows
|| t
>= b
|| nr
< 1)
289 if (CON_IS_VISIBLE(vc
) && vc
->vc_sw
->con_scroll(vc
, t
, b
, SM_DOWN
, nr
))
291 s
= (unsigned short *)(vc
->vc_origin
+ vc
->vc_size_row
* t
);
292 step
= vc
->vc_cols
* nr
;
293 scr_memmovew(s
+ step
, s
, (b
- t
- nr
) * vc
->vc_size_row
);
294 scr_memsetw(s
, vc
->vc_video_erase_char
, 2 * step
);
297 static void do_update_region(struct vc_data
*vc
, unsigned long start
, int count
)
299 #ifndef VT_BUF_VRAM_ONLY
300 unsigned int xx
, yy
, offset
;
304 if (!vc
->vc_sw
->con_getxy
) {
305 offset
= (start
- vc
->vc_origin
) / 2;
306 xx
= offset
% vc
->vc_cols
;
307 yy
= offset
/ vc
->vc_cols
;
310 start
= vc
->vc_sw
->con_getxy(vc
, start
, &nxx
, &nyy
);
314 u16 attrib
= scr_readw(p
) & 0xff00;
317 while (xx
< vc
->vc_cols
&& count
) {
318 if (attrib
!= (scr_readw(p
) & 0xff00)) {
320 vc
->vc_sw
->con_putcs(vc
, q
, p
-q
, yy
, startx
);
323 attrib
= scr_readw(p
) & 0xff00;
330 vc
->vc_sw
->con_putcs(vc
, q
, p
-q
, yy
, startx
);
335 if (vc
->vc_sw
->con_getxy
) {
337 start
= vc
->vc_sw
->con_getxy(vc
, start
, NULL
, NULL
);
343 void update_region(struct vc_data
*vc
, unsigned long start
, int count
)
345 WARN_CONSOLE_UNLOCKED();
349 do_update_region(vc
, start
, count
);
354 /* Structure of attributes is hardware-dependent */
356 static u8
build_attr(struct vc_data
*vc
, u8 _color
, u8 _intensity
, u8 _blink
, u8 _underline
, u8 _reverse
)
358 if (vc
->vc_sw
->con_build_attr
)
359 return vc
->vc_sw
->con_build_attr(vc
, _color
, _intensity
, _blink
, _underline
, _reverse
);
361 #ifndef VT_BUF_VRAM_ONLY
363 * ++roman: I completely changed the attribute format for monochrome
364 * mode (!can_do_color). The formerly used MDA (monochrome display
365 * adapter) format didn't allow the combination of certain effects.
366 * Now the attribute is just a bit vector:
367 * Bit 0..1: intensity (0..2)
374 if (!vc
->vc_can_do_color
)
376 (_underline
? 4 : 0) |
380 a
= (a
& 0xf0) | vc
->vc_ulcolor
;
381 else if (_intensity
== 0)
382 a
= (a
& 0xf0) | vc
->vc_ulcolor
;
384 a
= ((a
) & 0x88) | ((((a
) >> 4) | ((a
) << 4)) & 0x77);
389 if (vc
->vc_hi_font_mask
== 0x100)
398 static void update_attr(struct vc_data
*vc
)
400 vc
->vc_attr
= build_attr(vc
, vc
->vc_color
, vc
->vc_intensity
, vc
->vc_blink
, vc
->vc_underline
, vc
->vc_reverse
^ vc
->vc_decscnm
);
401 vc
->vc_video_erase_char
= (build_attr(vc
, vc
->vc_color
, 1, vc
->vc_blink
, 0, vc
->vc_decscnm
) << 8) | ' ';
404 /* Note: inverting the screen twice should revert to the original state */
405 void invert_screen(struct vc_data
*vc
, int offset
, int count
, int viewed
)
409 WARN_CONSOLE_UNLOCKED();
412 p
= screenpos(vc
, offset
, viewed
);
413 if (vc
->vc_sw
->con_invert_region
)
414 vc
->vc_sw
->con_invert_region(vc
, p
, count
);
415 #ifndef VT_BUF_VRAM_ONLY
421 if (!vc
->vc_can_do_color
) {
428 } else if (vc
->vc_hi_font_mask
== 0x100) {
431 a
= ((a
) & 0x11ff) | (((a
) & 0xe000) >> 4) | (((a
) & 0x0e00) << 4);
438 a
= ((a
) & 0x88ff) | (((a
) & 0x7000) >> 4) | (((a
) & 0x0700) << 4);
446 do_update_region(vc
, (unsigned long) p
, count
);
449 /* used by selection: complement pointer position */
450 void complement_pos(struct vc_data
*vc
, int offset
)
452 static int old_offset
= -1;
453 static unsigned short old
;
454 static unsigned short oldx
, oldy
;
456 WARN_CONSOLE_UNLOCKED();
458 if (old_offset
!= -1 && old_offset
>= 0 &&
459 old_offset
< vc
->vc_screenbuf_size
) {
460 scr_writew(old
, screenpos(vc
, old_offset
, 1));
462 vc
->vc_sw
->con_putc(vc
, old
, oldy
, oldx
);
467 if (offset
!= -1 && offset
>= 0 &&
468 offset
< vc
->vc_screenbuf_size
) {
471 p
= screenpos(vc
, offset
, 1);
473 new = old
^ vc
->vc_complement_mask
;
476 oldx
= (offset
>> 1) % vc
->vc_cols
;
477 oldy
= (offset
>> 1) / vc
->vc_cols
;
478 vc
->vc_sw
->con_putc(vc
, new, oldy
, oldx
);
484 static void insert_char(struct vc_data
*vc
, unsigned int nr
)
486 unsigned short *p
, *q
= (unsigned short *)vc
->vc_pos
;
488 p
= q
+ vc
->vc_cols
- nr
- vc
->vc_x
;
490 scr_writew(scr_readw(p
), p
+ nr
);
491 scr_memsetw(q
, vc
->vc_video_erase_char
, nr
* 2);
492 vc
->vc_need_wrap
= 0;
494 unsigned short oldattr
= vc
->vc_attr
;
495 vc
->vc_sw
->con_bmove(vc
, vc
->vc_y
, vc
->vc_x
, vc
->vc_y
, vc
->vc_x
+ nr
, 1,
496 vc
->vc_cols
- vc
->vc_x
- nr
);
497 vc
->vc_attr
= vc
->vc_video_erase_char
>> 8;
499 vc
->vc_sw
->con_putc(vc
, vc
->vc_video_erase_char
, vc
->vc_y
, vc
->vc_x
+ nr
);
500 vc
->vc_attr
= oldattr
;
504 static void delete_char(struct vc_data
*vc
, unsigned int nr
)
506 unsigned int i
= vc
->vc_x
;
507 unsigned short *p
= (unsigned short *)vc
->vc_pos
;
509 while (++i
<= vc
->vc_cols
- nr
) {
510 scr_writew(scr_readw(p
+nr
), p
);
513 scr_memsetw(p
, vc
->vc_video_erase_char
, nr
* 2);
514 vc
->vc_need_wrap
= 0;
516 unsigned short oldattr
= vc
->vc_attr
;
517 vc
->vc_sw
->con_bmove(vc
, vc
->vc_y
, vc
->vc_x
+ nr
, vc
->vc_y
, vc
->vc_x
, 1,
518 vc
->vc_cols
- vc
->vc_x
- nr
);
519 vc
->vc_attr
= vc
->vc_video_erase_char
>> 8;
521 vc
->vc_sw
->con_putc(vc
, vc
->vc_video_erase_char
, vc
->vc_y
,
522 vc
->vc_cols
- 1 - nr
);
523 vc
->vc_attr
= oldattr
;
527 static int softcursor_original
;
529 static void add_softcursor(struct vc_data
*vc
)
531 int i
= scr_readw((u16
*) vc
->vc_pos
);
532 u32 type
= vc
->vc_cursor_type
;
534 if (! (type
& 0x10)) return;
535 if (softcursor_original
!= -1) return;
536 softcursor_original
= i
;
537 i
|= ((type
>> 8) & 0xff00 );
538 i
^= ((type
) & 0xff00 );
539 if ((type
& 0x20) && ((softcursor_original
& 0x7000) == (i
& 0x7000))) i
^= 0x7000;
540 if ((type
& 0x40) && ((i
& 0x700) == ((i
& 0x7000) >> 4))) i
^= 0x0700;
541 scr_writew(i
, (u16
*) vc
->vc_pos
);
543 vc
->vc_sw
->con_putc(vc
, i
, vc
->vc_y
, vc
->vc_x
);
546 static void hide_softcursor(struct vc_data
*vc
)
548 if (softcursor_original
!= -1) {
549 scr_writew(softcursor_original
, (u16
*)vc
->vc_pos
);
551 vc
->vc_sw
->con_putc(vc
, softcursor_original
,
553 softcursor_original
= -1;
557 static void hide_cursor(struct vc_data
*vc
)
561 vc
->vc_sw
->con_cursor(vc
, CM_ERASE
);
565 static void set_cursor(struct vc_data
*vc
)
567 if (!IS_FG(vc
) || console_blanked
||
568 vc
->vc_mode
== KD_GRAPHICS
)
574 if ((vc
->vc_cursor_type
& 0x0f) != 1)
575 vc
->vc_sw
->con_cursor(vc
, CM_DRAW
);
580 static void set_origin(struct vc_data
*vc
)
582 WARN_CONSOLE_UNLOCKED();
584 if (!CON_IS_VISIBLE(vc
) ||
585 !vc
->vc_sw
->con_set_origin
||
586 !vc
->vc_sw
->con_set_origin(vc
))
587 vc
->vc_origin
= (unsigned long)vc
->vc_screenbuf
;
588 vc
->vc_visible_origin
= vc
->vc_origin
;
589 vc
->vc_scr_end
= vc
->vc_origin
+ vc
->vc_screenbuf_size
;
590 vc
->vc_pos
= vc
->vc_origin
+ vc
->vc_size_row
* vc
->vc_y
+ 2 * vc
->vc_x
;
593 static inline void save_screen(struct vc_data
*vc
)
595 WARN_CONSOLE_UNLOCKED();
597 if (vc
->vc_sw
->con_save_screen
)
598 vc
->vc_sw
->con_save_screen(vc
);
602 * Redrawing of screen
605 static void clear_buffer_attributes(struct vc_data
*vc
)
607 unsigned short *p
= (unsigned short *)vc
->vc_origin
;
608 int count
= vc
->vc_screenbuf_size
/ 2;
609 int mask
= vc
->vc_hi_font_mask
| 0xff;
611 for (; count
> 0; count
--, p
++) {
612 scr_writew((scr_readw(p
)&mask
) | (vc
->vc_video_erase_char
& ~mask
), p
);
616 void redraw_screen(struct vc_data
*vc
, int is_switch
)
620 WARN_CONSOLE_UNLOCKED();
624 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
629 struct vc_data
*old_vc
= vc_cons
[fg_console
].d
;
632 if (!CON_IS_VISIBLE(vc
))
634 *vc
->vc_display_fg
= vc
;
635 fg_console
= vc
->vc_num
;
637 if (!CON_IS_VISIBLE(old_vc
)) {
648 int old_was_color
= vc
->vc_can_do_color
;
651 update
= vc
->vc_sw
->con_switch(vc
);
654 * If console changed from mono<->color, the best we can do
655 * is to clear the buffer attributes. As it currently stands,
656 * rebuilding new attributes from the old buffer is not doable
657 * without overly complex code.
659 if (old_was_color
!= vc
->vc_can_do_color
) {
661 clear_buffer_attributes(vc
);
663 if (update
&& vc
->vc_mode
!= KD_GRAPHICS
)
664 do_update_region(vc
, vc
->vc_origin
, vc
->vc_screenbuf_size
/ 2);
669 compute_shiftstate();
674 * Allocation, freeing and resizing of VTs.
677 int vc_cons_allocated(unsigned int i
)
679 return (i
< MAX_NR_CONSOLES
&& vc_cons
[i
].d
);
682 static void visual_init(struct vc_data
*vc
, int num
, int init
)
684 /* ++Geert: vc->vc_sw->con_init determines console size */
686 module_put(vc
->vc_sw
->owner
);
687 vc
->vc_sw
= conswitchp
;
688 #ifndef VT_SINGLE_DRIVER
689 if (con_driver_map
[num
])
690 vc
->vc_sw
= con_driver_map
[num
];
692 __module_get(vc
->vc_sw
->owner
);
694 vc
->vc_display_fg
= &master_display_fg
;
695 vc
->vc_uni_pagedir_loc
= &vc
->vc_uni_pagedir
;
696 vc
->vc_uni_pagedir
= 0;
697 vc
->vc_hi_font_mask
= 0;
698 vc
->vc_complement_mask
= 0;
699 vc
->vc_can_do_color
= 0;
700 vc
->vc_sw
->con_init(vc
, init
);
701 if (!vc
->vc_complement_mask
)
702 vc
->vc_complement_mask
= vc
->vc_can_do_color
? 0x7700 : 0x0800;
703 vc
->vc_s_complement_mask
= vc
->vc_complement_mask
;
704 vc
->vc_size_row
= vc
->vc_cols
<< 1;
705 vc
->vc_screenbuf_size
= vc
->vc_rows
* vc
->vc_size_row
;
708 int vc_allocate(unsigned int currcons
) /* return 0 on success */
710 WARN_CONSOLE_UNLOCKED();
712 if (currcons
>= MAX_NR_CONSOLES
)
714 if (!vc_cons
[currcons
].d
) {
717 /* prevent users from taking too much memory */
718 if (currcons
>= MAX_NR_USER_CONSOLES
&& !capable(CAP_SYS_RESOURCE
))
721 /* due to the granularity of kmalloc, we waste some memory here */
722 /* the alloc is done in two steps, to optimize the common situation
723 of a 25x80 console (structsize=216, screenbuf_size=4000) */
724 /* although the numbers above are not valid since long ago, the
725 point is still up-to-date and the comment still has its value
726 even if only as a historical artifact. --mj, July 1998 */
727 vc
= kmalloc(sizeof(struct vc_data
), GFP_KERNEL
);
730 memset(vc
, 0, sizeof(*vc
));
731 vc_cons
[currcons
].d
= vc
;
732 visual_init(vc
, currcons
, 1);
733 if (!*vc
->vc_uni_pagedir_loc
)
734 con_set_default_unimap(vc
);
735 vc
->vc_screenbuf
= kmalloc(vc
->vc_screenbuf_size
, GFP_KERNEL
);
736 if (!vc
->vc_screenbuf
) {
738 vc_cons
[currcons
].d
= NULL
;
741 vc
->vc_kmalloced
= 1;
742 vc_init(vc
, vc
->vc_rows
, vc
->vc_cols
, 1);
747 static inline int resize_screen(struct vc_data
*vc
, int width
, int height
)
749 /* Resizes the resolution of the display adapater */
752 if (vc
->vc_mode
!= KD_GRAPHICS
&& vc
->vc_sw
->con_resize
)
753 err
= vc
->vc_sw
->con_resize(vc
, width
, height
);
758 * Change # of rows and columns (0 means unchanged/the size of fg_console)
759 * [this is to be used together with some user program
760 * like resize that changes the hardware videomode]
762 #define VC_RESIZE_MAXCOL (32767)
763 #define VC_RESIZE_MAXROW (32767)
764 int vc_resize(struct vc_data
*vc
, unsigned int cols
, unsigned int lines
)
766 unsigned long old_origin
, new_origin
, new_scr_end
, rlth
, rrem
, err
= 0;
767 unsigned int old_cols
, old_rows
, old_row_size
, old_screen_size
;
768 unsigned int new_cols
, new_rows
, new_row_size
, new_screen_size
;
770 unsigned short *newscreen
;
772 WARN_CONSOLE_UNLOCKED();
777 if (cols
> VC_RESIZE_MAXCOL
|| lines
> VC_RESIZE_MAXROW
)
780 new_cols
= (cols
? cols
: vc
->vc_cols
);
781 new_rows
= (lines
? lines
: vc
->vc_rows
);
782 new_row_size
= new_cols
<< 1;
783 new_screen_size
= new_row_size
* new_rows
;
785 if (new_cols
== vc
->vc_cols
&& new_rows
== vc
->vc_rows
)
788 newscreen
= (unsigned short *) kmalloc(new_screen_size
, GFP_USER
);
792 old_rows
= vc
->vc_rows
;
793 old_cols
= vc
->vc_cols
;
794 old_row_size
= vc
->vc_size_row
;
795 old_screen_size
= vc
->vc_screenbuf_size
;
797 err
= resize_screen(vc
, new_cols
, new_rows
);
803 vc
->vc_rows
= new_rows
;
804 vc
->vc_cols
= new_cols
;
805 vc
->vc_size_row
= new_row_size
;
806 vc
->vc_screenbuf_size
= new_screen_size
;
808 rlth
= min(old_row_size
, new_row_size
);
809 rrem
= new_row_size
- rlth
;
810 old_origin
= vc
->vc_origin
;
811 new_origin
= (long) newscreen
;
812 new_scr_end
= new_origin
+ new_screen_size
;
814 if (vc
->vc_y
> new_rows
) {
815 if (old_rows
- vc
->vc_y
< new_rows
) {
817 * Cursor near the bottom, copy contents from the
820 old_origin
+= (old_rows
- new_rows
) * old_row_size
;
821 end
= vc
->vc_scr_end
;
824 * Cursor is in no man's land, copy 1/2 screenful
825 * from the top and bottom of cursor position
827 old_origin
+= (vc
->vc_y
- new_rows
/2) * old_row_size
;
828 end
= old_origin
+ (old_row_size
* new_rows
);
832 * Cursor near the top, copy contents from the top of buffer
834 end
= (old_rows
> new_rows
) ? old_origin
+
835 (old_row_size
* new_rows
) :
840 while (old_origin
< end
) {
841 scr_memcpyw((unsigned short *) new_origin
,
842 (unsigned short *) old_origin
, rlth
);
844 scr_memsetw((void *)(new_origin
+ rlth
),
845 vc
->vc_video_erase_char
, rrem
);
846 old_origin
+= old_row_size
;
847 new_origin
+= new_row_size
;
849 if (new_scr_end
> new_origin
)
850 scr_memsetw((void *)new_origin
, vc
->vc_video_erase_char
,
851 new_scr_end
- new_origin
);
852 if (vc
->vc_kmalloced
)
853 kfree(vc
->vc_screenbuf
);
854 vc
->vc_screenbuf
= newscreen
;
855 vc
->vc_kmalloced
= 1;
856 vc
->vc_screenbuf_size
= new_screen_size
;
859 /* do part of a reset_terminal() */
861 vc
->vc_bottom
= vc
->vc_rows
;
862 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
);
866 struct winsize ws
, *cws
= &vc
->vc_tty
->winsize
;
868 memset(&ws
, 0, sizeof(ws
));
869 ws
.ws_row
= vc
->vc_rows
;
870 ws
.ws_col
= vc
->vc_cols
;
871 ws
.ws_ypixel
= vc
->vc_scan_lines
;
872 if ((ws
.ws_row
!= cws
->ws_row
|| ws
.ws_col
!= cws
->ws_col
) &&
873 vc
->vc_tty
->pgrp
> 0)
874 kill_pg(vc
->vc_tty
->pgrp
, SIGWINCH
, 1);
878 if (CON_IS_VISIBLE(vc
))
884 void vc_disallocate(unsigned int currcons
)
886 WARN_CONSOLE_UNLOCKED();
888 if (vc_cons_allocated(currcons
)) {
889 struct vc_data
*vc
= vc_cons
[currcons
].d
;
890 vc
->vc_sw
->con_deinit(vc
);
891 if (vc
->vc_kmalloced
)
892 kfree(vc
->vc_screenbuf
);
893 if (currcons
>= MIN_NR_CONSOLES
)
895 vc_cons
[currcons
].d
= NULL
;
903 #define set_kbd(vc, x) set_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
904 #define clr_kbd(vc, x) clr_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
905 #define is_kbd(vc, x) vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
907 #define decarm VC_REPEAT
908 #define decckm VC_CKMODE
909 #define kbdapplic VC_APPLIC
913 * this is what the terminal answers to a ESC-Z or csi0c query.
915 #define VT100ID "\033[?1;2c"
916 #define VT102ID "\033[?6c"
918 unsigned char color_table
[] = { 0, 4, 2, 6, 1, 5, 3, 7,
919 8,12,10,14, 9,13,11,15 };
921 /* the default colour table, for VGA+ colour systems */
922 int default_red
[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
923 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
924 int default_grn
[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
925 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
926 int default_blu
[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
927 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
930 * gotoxy() must verify all boundaries, because the arguments
931 * might also be negative. If the given position is out of
932 * bounds, the cursor is placed at the nearest margin.
934 static void gotoxy(struct vc_data
*vc
, int new_x
, int new_y
)
941 if (new_x
>= vc
->vc_cols
)
942 vc
->vc_x
= vc
->vc_cols
- 1;
949 max_y
= vc
->vc_bottom
;
956 else if (new_y
>= max_y
)
957 vc
->vc_y
= max_y
- 1;
960 vc
->vc_pos
= vc
->vc_origin
+ vc
->vc_y
* vc
->vc_size_row
+ (vc
->vc_x
<<1);
961 vc
->vc_need_wrap
= 0;
964 /* for absolute user moves, when decom is set */
965 static void gotoxay(struct vc_data
*vc
, int new_x
, int new_y
)
967 gotoxy(vc
, new_x
, vc
->vc_decom
? (vc
->vc_top
+ new_y
) : new_y
);
970 void scrollback(struct vc_data
*vc
, int lines
)
973 lines
= vc
->vc_rows
/ 2;
977 void scrollfront(struct vc_data
*vc
, int lines
)
980 lines
= vc
->vc_rows
/ 2;
984 static void lf(struct vc_data
*vc
)
986 /* don't scroll if above bottom of scrolling region, or
987 * if below scrolling region
989 if (vc
->vc_y
+ 1 == vc
->vc_bottom
)
990 scrup(vc
, vc
->vc_top
, vc
->vc_bottom
, 1);
991 else if (vc
->vc_y
< vc
->vc_rows
- 1) {
993 vc
->vc_pos
+= vc
->vc_size_row
;
995 vc
->vc_need_wrap
= 0;
998 static void ri(struct vc_data
*vc
)
1000 /* don't scroll if below top of scrolling region, or
1001 * if above scrolling region
1003 if (vc
->vc_y
== vc
->vc_top
)
1004 scrdown(vc
, vc
->vc_top
, vc
->vc_bottom
, 1);
1005 else if (vc
->vc_y
> 0) {
1007 vc
->vc_pos
-= vc
->vc_size_row
;
1009 vc
->vc_need_wrap
= 0;
1012 static inline void cr(struct vc_data
*vc
)
1014 vc
->vc_pos
-= vc
->vc_x
<< 1;
1015 vc
->vc_need_wrap
= vc
->vc_x
= 0;
1018 static inline void bs(struct vc_data
*vc
)
1023 vc
->vc_need_wrap
= 0;
1027 static inline void del(struct vc_data
*vc
)
1032 static void csi_J(struct vc_data
*vc
, int vpar
)
1035 unsigned short * start
;
1038 case 0: /* erase from cursor to end of display */
1039 count
= (vc
->vc_scr_end
- vc
->vc_pos
) >> 1;
1040 start
= (unsigned short *)vc
->vc_pos
;
1041 if (DO_UPDATE(vc
)) {
1042 /* do in two stages */
1043 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, vc
->vc_x
, 1,
1044 vc
->vc_cols
- vc
->vc_x
);
1045 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
+ 1, 0,
1046 vc
->vc_rows
- vc
->vc_y
- 1,
1050 case 1: /* erase from start to cursor */
1051 count
= ((vc
->vc_pos
- vc
->vc_origin
) >> 1) + 1;
1052 start
= (unsigned short *)vc
->vc_origin
;
1053 if (DO_UPDATE(vc
)) {
1054 /* do in two stages */
1055 vc
->vc_sw
->con_clear(vc
, 0, 0, vc
->vc_y
,
1057 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, 0, 1,
1061 case 2: /* erase whole display */
1062 count
= vc
->vc_cols
* vc
->vc_rows
;
1063 start
= (unsigned short *)vc
->vc_origin
;
1065 vc
->vc_sw
->con_clear(vc
, 0, 0,
1072 scr_memsetw(start
, vc
->vc_video_erase_char
, 2 * count
);
1073 vc
->vc_need_wrap
= 0;
1076 static void csi_K(struct vc_data
*vc
, int vpar
)
1079 unsigned short * start
;
1082 case 0: /* erase from cursor to end of line */
1083 count
= vc
->vc_cols
- vc
->vc_x
;
1084 start
= (unsigned short *)vc
->vc_pos
;
1086 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, vc
->vc_x
, 1,
1087 vc
->vc_cols
- vc
->vc_x
);
1089 case 1: /* erase from start of line to cursor */
1090 start
= (unsigned short *)(vc
->vc_pos
- (vc
->vc_x
<< 1));
1091 count
= vc
->vc_x
+ 1;
1093 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, 0, 1,
1096 case 2: /* erase whole line */
1097 start
= (unsigned short *)(vc
->vc_pos
- (vc
->vc_x
<< 1));
1098 count
= vc
->vc_cols
;
1100 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, 0, 1,
1106 scr_memsetw(start
, vc
->vc_video_erase_char
, 2 * count
);
1107 vc
->vc_need_wrap
= 0;
1110 static void csi_X(struct vc_data
*vc
, int vpar
) /* erase the following vpar positions */
1116 count
= (vpar
> vc
->vc_cols
- vc
->vc_x
) ? (vc
->vc_cols
- vc
->vc_x
) : vpar
;
1118 scr_memsetw((unsigned short *)vc
->vc_pos
, vc
->vc_video_erase_char
, 2 * count
);
1120 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, vc
->vc_x
, 1, count
);
1121 vc
->vc_need_wrap
= 0;
1124 static void default_attr(struct vc_data
*vc
)
1126 vc
->vc_intensity
= 1;
1127 vc
->vc_underline
= 0;
1130 vc
->vc_color
= vc
->vc_def_color
;
1133 /* console_sem is held */
1134 static void csi_m(struct vc_data
*vc
)
1138 for (i
= 0; i
<= vc
->vc_npar
; i
++)
1139 switch (vc
->vc_par
[i
]) {
1140 case 0: /* all attributes off */
1144 vc
->vc_intensity
= 2;
1147 vc
->vc_intensity
= 0;
1150 vc
->vc_underline
= 1;
1158 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1159 * Select primary font, don't display
1160 * control chars if defined, don't set
1163 vc
->vc_translate
= set_translate(vc
->vc_charset
== 0
1165 : vc
->vc_G1_charset
, vc
);
1166 vc
->vc_disp_ctrl
= 0;
1167 vc
->vc_toggle_meta
= 0;
1169 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1170 * Select first alternate font, lets
1171 * chars < 32 be displayed as ROM chars.
1173 vc
->vc_translate
= set_translate(IBMPC_MAP
, vc
);
1174 vc
->vc_disp_ctrl
= 1;
1175 vc
->vc_toggle_meta
= 0;
1177 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1178 * Select second alternate font, toggle
1179 * high bit before displaying as ROM char.
1181 vc
->vc_translate
= set_translate(IBMPC_MAP
, vc
);
1182 vc
->vc_disp_ctrl
= 1;
1183 vc
->vc_toggle_meta
= 1;
1187 vc
->vc_intensity
= 1;
1190 vc
->vc_underline
= 0;
1198 case 38: /* ANSI X3.64-1979 (SCO-ish?)
1199 * Enables underscore, white foreground
1200 * with white underscore (Linux - use
1201 * default foreground).
1203 vc
->vc_color
= (vc
->vc_def_color
& 0x0f) | (vc
->vc_color
& 0xf0);
1204 vc
->vc_underline
= 1;
1206 case 39: /* ANSI X3.64-1979 (SCO-ish?)
1207 * Disable underline option.
1208 * Reset colour to default? It did this
1211 vc
->vc_color
= (vc
->vc_def_color
& 0x0f) | (vc
->vc_color
& 0xf0);
1212 vc
->vc_underline
= 0;
1215 vc
->vc_color
= (vc
->vc_def_color
& 0xf0) | (vc
->vc_color
& 0x0f);
1218 if (vc
->vc_par
[i
] >= 30 && vc
->vc_par
[i
] <= 37)
1219 vc
->vc_color
= color_table
[vc
->vc_par
[i
] - 30]
1220 | (vc
->vc_color
& 0xf0);
1221 else if (vc
->vc_par
[i
] >= 40 && vc
->vc_par
[i
] <= 47)
1222 vc
->vc_color
= (color_table
[vc
->vc_par
[i
] - 40] << 4)
1223 | (vc
->vc_color
& 0x0f);
1229 static void respond_string(const char *p
, struct tty_struct
*tty
)
1232 tty_insert_flip_char(tty
, *p
, 0);
1235 con_schedule_flip(tty
);
1238 static void cursor_report(struct vc_data
*vc
, struct tty_struct
*tty
)
1242 sprintf(buf
, "\033[%d;%dR", vc
->vc_y
+ (vc
->vc_decom
? vc
->vc_top
+ 1 : 1), vc
->vc_x
+ 1);
1243 respond_string(buf
, tty
);
1246 static inline void status_report(struct tty_struct
*tty
)
1248 respond_string("\033[0n", tty
); /* Terminal ok */
1251 static inline void respond_ID(struct tty_struct
* tty
)
1253 respond_string(VT102ID
, tty
);
1256 void mouse_report(struct tty_struct
*tty
, int butt
, int mrx
, int mry
)
1260 sprintf(buf
, "\033[M%c%c%c", (char)(' ' + butt
), (char)('!' + mrx
),
1262 respond_string(buf
, tty
);
1265 /* invoked via ioctl(TIOCLINUX) and through set_selection */
1266 int mouse_reporting(void)
1268 return vc_cons
[fg_console
].d
->vc_report_mouse
;
1271 /* console_sem is held */
1272 static void set_mode(struct vc_data
*vc
, int on_off
)
1276 for (i
= 0; i
<= vc
->vc_npar
; i
++)
1278 switch(vc
->vc_par
[i
]) { /* DEC private modes set/reset */
1279 case 1: /* Cursor keys send ^[Ox/^[[x */
1281 set_kbd(vc
, decckm
);
1283 clr_kbd(vc
, decckm
);
1285 case 3: /* 80/132 mode switch unimplemented */
1286 vc
->vc_deccolm
= on_off
;
1288 vc_resize(deccolm
? 132 : 80, vc
->vc_rows
);
1289 /* this alone does not suffice; some user mode
1290 utility has to change the hardware regs */
1293 case 5: /* Inverted screen on/off */
1294 if (vc
->vc_decscnm
!= on_off
) {
1295 vc
->vc_decscnm
= on_off
;
1296 invert_screen(vc
, 0, vc
->vc_screenbuf_size
, 0);
1300 case 6: /* Origin relative/absolute */
1301 vc
->vc_decom
= on_off
;
1304 case 7: /* Autowrap on/off */
1305 vc
->vc_decawm
= on_off
;
1307 case 8: /* Autorepeat on/off */
1309 set_kbd(vc
, decarm
);
1311 clr_kbd(vc
, decarm
);
1314 vc
->vc_report_mouse
= on_off
? 1 : 0;
1316 case 25: /* Cursor on/off */
1317 vc
->vc_deccm
= on_off
;
1320 vc
->vc_report_mouse
= on_off
? 2 : 0;
1324 switch(vc
->vc_par
[i
]) { /* ANSI modes set/reset */
1325 case 3: /* Monitor (display ctrls) */
1326 vc
->vc_disp_ctrl
= on_off
;
1328 case 4: /* Insert Mode on/off */
1329 vc
->vc_decim
= on_off
;
1331 case 20: /* Lf, Enter == CrLf/Lf */
1341 /* console_sem is held */
1342 static void setterm_command(struct vc_data
*vc
)
1344 switch(vc
->vc_par
[0]) {
1345 case 1: /* set color for underline mode */
1346 if (vc
->vc_can_do_color
&&
1347 vc
->vc_par
[1] < 16) {
1348 vc
->vc_ulcolor
= color_table
[vc
->vc_par
[1]];
1349 if (vc
->vc_underline
)
1353 case 2: /* set color for half intensity mode */
1354 if (vc
->vc_can_do_color
&&
1355 vc
->vc_par
[1] < 16) {
1356 vc
->vc_halfcolor
= color_table
[vc
->vc_par
[1]];
1357 if (vc
->vc_intensity
== 0)
1361 case 8: /* store colors as defaults */
1362 vc
->vc_def_color
= vc
->vc_attr
;
1363 if (vc
->vc_hi_font_mask
== 0x100)
1364 vc
->vc_def_color
>>= 1;
1368 case 9: /* set blanking interval */
1369 blankinterval
= ((vc
->vc_par
[1] < 60) ? vc
->vc_par
[1] : 60) * 60 * HZ
;
1370 poke_blanked_console();
1372 case 10: /* set bell frequency in Hz */
1373 if (vc
->vc_npar
>= 1)
1374 vc
->vc_bell_pitch
= vc
->vc_par
[1];
1376 vc
->vc_bell_pitch
= DEFAULT_BELL_PITCH
;
1378 case 11: /* set bell duration in msec */
1379 if (vc
->vc_npar
>= 1)
1380 vc
->vc_bell_duration
= (vc
->vc_par
[1] < 2000) ?
1381 vc
->vc_par
[1] * HZ
/ 1000 : 0;
1383 vc
->vc_bell_duration
= DEFAULT_BELL_DURATION
;
1385 case 12: /* bring specified console to the front */
1386 if (vc
->vc_par
[1] >= 1 && vc_cons_allocated(vc
->vc_par
[1] - 1))
1387 set_console(vc
->vc_par
[1] - 1);
1389 case 13: /* unblank the screen */
1390 poke_blanked_console();
1392 case 14: /* set vesa powerdown interval */
1393 vesa_off_interval
= ((vc
->vc_par
[1] < 60) ? vc
->vc_par
[1] : 60) * 60 * HZ
;
1395 case 15: /* activate the previous console */
1396 set_console(last_console
);
1401 /* console_sem is held */
1402 static void csi_at(struct vc_data
*vc
, unsigned int nr
)
1404 if (nr
> vc
->vc_cols
- vc
->vc_x
)
1405 nr
= vc
->vc_cols
- vc
->vc_x
;
1408 insert_char(vc
, nr
);
1411 /* console_sem is held */
1412 static void csi_L(struct vc_data
*vc
, unsigned int nr
)
1414 if (nr
> vc
->vc_rows
- vc
->vc_y
)
1415 nr
= vc
->vc_rows
- vc
->vc_y
;
1418 scrdown(vc
, vc
->vc_y
, vc
->vc_bottom
, nr
);
1419 vc
->vc_need_wrap
= 0;
1422 /* console_sem is held */
1423 static void csi_P(struct vc_data
*vc
, unsigned int nr
)
1425 if (nr
> vc
->vc_cols
- vc
->vc_x
)
1426 nr
= vc
->vc_cols
- vc
->vc_x
;
1429 delete_char(vc
, nr
);
1432 /* console_sem is held */
1433 static void csi_M(struct vc_data
*vc
, unsigned int nr
)
1435 if (nr
> vc
->vc_rows
- vc
->vc_y
)
1436 nr
= vc
->vc_rows
- vc
->vc_y
;
1439 scrup(vc
, vc
->vc_y
, vc
->vc_bottom
, nr
);
1440 vc
->vc_need_wrap
= 0;
1443 /* console_sem is held (except via vc_init->reset_terminal */
1444 static void save_cur(struct vc_data
*vc
)
1446 vc
->vc_saved_x
= vc
->vc_x
;
1447 vc
->vc_saved_y
= vc
->vc_y
;
1448 vc
->vc_s_intensity
= vc
->vc_intensity
;
1449 vc
->vc_s_underline
= vc
->vc_underline
;
1450 vc
->vc_s_blink
= vc
->vc_blink
;
1451 vc
->vc_s_reverse
= vc
->vc_reverse
;
1452 vc
->vc_s_charset
= vc
->vc_charset
;
1453 vc
->vc_s_color
= vc
->vc_color
;
1454 vc
->vc_saved_G0
= vc
->vc_G0_charset
;
1455 vc
->vc_saved_G1
= vc
->vc_G1_charset
;
1458 /* console_sem is held */
1459 static void restore_cur(struct vc_data
*vc
)
1461 gotoxy(vc
, vc
->vc_saved_x
, vc
->vc_saved_y
);
1462 vc
->vc_intensity
= vc
->vc_s_intensity
;
1463 vc
->vc_underline
= vc
->vc_s_underline
;
1464 vc
->vc_blink
= vc
->vc_s_blink
;
1465 vc
->vc_reverse
= vc
->vc_s_reverse
;
1466 vc
->vc_charset
= vc
->vc_s_charset
;
1467 vc
->vc_color
= vc
->vc_s_color
;
1468 vc
->vc_G0_charset
= vc
->vc_saved_G0
;
1469 vc
->vc_G1_charset
= vc
->vc_saved_G1
;
1470 vc
->vc_translate
= set_translate(vc
->vc_charset
? vc
->vc_G1_charset
: vc
->vc_G0_charset
, vc
);
1472 vc
->vc_need_wrap
= 0;
1475 enum { ESnormal
, ESesc
, ESsquare
, ESgetpars
, ESgotpars
, ESfunckey
,
1476 EShash
, ESsetG0
, ESsetG1
, ESpercent
, ESignore
, ESnonstd
,
1479 /* console_sem is held (except via vc_init()) */
1480 static void reset_terminal(struct vc_data
*vc
, int do_clear
)
1483 vc
->vc_bottom
= vc
->vc_rows
;
1484 vc
->vc_state
= ESnormal
;
1486 vc
->vc_translate
= set_translate(LAT1_MAP
, vc
);
1487 vc
->vc_G0_charset
= LAT1_MAP
;
1488 vc
->vc_G1_charset
= GRAF_MAP
;
1490 vc
->vc_need_wrap
= 0;
1491 vc
->vc_report_mouse
= 0;
1493 vc
->vc_utf_count
= 0;
1495 vc
->vc_disp_ctrl
= 0;
1496 vc
->vc_toggle_meta
= 0;
1504 set_kbd(vc
, decarm
);
1505 clr_kbd(vc
, decckm
);
1506 clr_kbd(vc
, kbdapplic
);
1508 kbd_table
[vc
->vc_num
].lockstate
= 0;
1509 kbd_table
[vc
->vc_num
].slockstate
= 0;
1510 kbd_table
[vc
->vc_num
].ledmode
= LED_SHOW_FLAGS
;
1511 kbd_table
[vc
->vc_num
].ledflagstate
= kbd_table
[vc
->vc_num
].default_ledflagstate
;
1512 /* do not do set_leds here because this causes an endless tasklet loop
1513 when the keyboard hasn't been initialized yet */
1515 vc
->vc_cursor_type
= CUR_DEFAULT
;
1516 vc
->vc_complement_mask
= vc
->vc_s_complement_mask
;
1521 vc
->vc_tab_stop
[0] = 0x01010100;
1522 vc
->vc_tab_stop
[1] =
1523 vc
->vc_tab_stop
[2] =
1524 vc
->vc_tab_stop
[3] =
1525 vc
->vc_tab_stop
[4] = 0x01010101;
1527 vc
->vc_bell_pitch
= DEFAULT_BELL_PITCH
;
1528 vc
->vc_bell_duration
= DEFAULT_BELL_DURATION
;
1536 /* console_sem is held */
1537 static void do_con_trol(struct tty_struct
*tty
, struct vc_data
*vc
, int c
)
1540 * Control characters can be used in the _middle_
1541 * of an escape sequence.
1547 if (vc
->vc_bell_duration
)
1548 kd_mksound(vc
->vc_bell_pitch
, vc
->vc_bell_duration
);
1554 vc
->vc_pos
-= (vc
->vc_x
<< 1);
1555 while (vc
->vc_x
< vc
->vc_cols
- 1) {
1557 if (vc
->vc_tab_stop
[vc
->vc_x
>> 5] & (1 << (vc
->vc_x
& 31)))
1560 vc
->vc_pos
+= (vc
->vc_x
<< 1);
1562 case 10: case 11: case 12:
1564 if (!is_kbd(vc
, lnm
))
1571 vc
->vc_translate
= set_translate(vc
->vc_G1_charset
, vc
);
1572 vc
->vc_disp_ctrl
= 1;
1576 vc
->vc_translate
= set_translate(vc
->vc_G0_charset
, vc
);
1577 vc
->vc_disp_ctrl
= 0;
1580 vc
->vc_state
= ESnormal
;
1583 vc
->vc_state
= ESesc
;
1589 vc
->vc_state
= ESsquare
;
1592 switch(vc
->vc_state
) {
1594 vc
->vc_state
= ESnormal
;
1597 vc
->vc_state
= ESsquare
;
1600 vc
->vc_state
= ESnonstd
;
1603 vc
->vc_state
= ESpercent
;
1616 vc
->vc_tab_stop
[vc
->vc_x
>> 5] |= (1 << (vc
->vc_x
& 31));
1628 vc
->vc_state
= ESsetG0
;
1631 vc
->vc_state
= ESsetG1
;
1634 vc
->vc_state
= EShash
;
1637 reset_terminal(vc
, 1);
1639 case '>': /* Numeric keypad */
1640 clr_kbd(vc
, kbdapplic
);
1642 case '=': /* Appl. keypad */
1643 set_kbd(vc
, kbdapplic
);
1648 if (c
=='P') { /* palette escape sequence */
1649 for (vc
->vc_npar
= 0; vc
->vc_npar
< NPAR
; vc
->vc_npar
++)
1650 vc
->vc_par
[vc
->vc_npar
] = 0;
1652 vc
->vc_state
= ESpalette
;
1654 } else if (c
=='R') { /* reset palette */
1656 vc
->vc_state
= ESnormal
;
1658 vc
->vc_state
= ESnormal
;
1661 if ( (c
>='0'&&c
<='9') || (c
>='A'&&c
<='F') || (c
>='a'&&c
<='f') ) {
1662 vc
->vc_par
[vc
->vc_npar
++] = (c
> '9' ? (c
& 0xDF) - 'A' + 10 : c
- '0');
1663 if (vc
->vc_npar
== 7) {
1664 int i
= vc
->vc_par
[0] * 3, j
= 1;
1665 vc
->vc_palette
[i
] = 16 * vc
->vc_par
[j
++];
1666 vc
->vc_palette
[i
++] += vc
->vc_par
[j
++];
1667 vc
->vc_palette
[i
] = 16 * vc
->vc_par
[j
++];
1668 vc
->vc_palette
[i
++] += vc
->vc_par
[j
++];
1669 vc
->vc_palette
[i
] = 16 * vc
->vc_par
[j
++];
1670 vc
->vc_palette
[i
] += vc
->vc_par
[j
];
1672 vc
->vc_state
= ESnormal
;
1675 vc
->vc_state
= ESnormal
;
1678 for (vc
->vc_npar
= 0; vc
->vc_npar
< NPAR
; vc
->vc_npar
++)
1679 vc
->vc_par
[vc
->vc_npar
] = 0;
1681 vc
->vc_state
= ESgetpars
;
1682 if (c
== '[') { /* Function key */
1683 vc
->vc_state
=ESfunckey
;
1686 vc
->vc_ques
= (c
== '?');
1690 if (c
== ';' && vc
->vc_npar
< NPAR
- 1) {
1693 } else if (c
>='0' && c
<='9') {
1694 vc
->vc_par
[vc
->vc_npar
] *= 10;
1695 vc
->vc_par
[vc
->vc_npar
] += c
- '0';
1698 vc
->vc_state
= ESgotpars
;
1700 vc
->vc_state
= ESnormal
;
1711 vc
->vc_cursor_type
= vc
->vc_par
[0] | (vc
->vc_par
[1] << 8) | (vc
->vc_par
[2] << 16);
1713 vc
->vc_cursor_type
= CUR_DEFAULT
;
1721 vc
->vc_complement_mask
= vc
->vc_par
[0] << 8 | vc
->vc_par
[1];
1723 vc
->vc_complement_mask
= vc
->vc_s_complement_mask
;
1729 if (vc
->vc_par
[0] == 5)
1731 else if (vc
->vc_par
[0] == 6)
1732 cursor_report(vc
, tty
);
1744 gotoxy(vc
, vc
->vc_par
[0], vc
->vc_y
);
1749 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
- vc
->vc_par
[0]);
1754 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
+ vc
->vc_par
[0]);
1759 gotoxy(vc
, vc
->vc_x
+ vc
->vc_par
[0], vc
->vc_y
);
1764 gotoxy(vc
, vc
->vc_x
- vc
->vc_par
[0], vc
->vc_y
);
1769 gotoxy(vc
, 0, vc
->vc_y
+ vc
->vc_par
[0]);
1774 gotoxy(vc
, 0, vc
->vc_y
- vc
->vc_par
[0]);
1779 gotoxay(vc
, vc
->vc_x
,vc
->vc_par
[0]);
1786 gotoxay(vc
, vc
->vc_par
[1], vc
->vc_par
[0]);
1789 csi_J(vc
, vc
->vc_par
[0]);
1792 csi_K(vc
, vc
->vc_par
[0]);
1795 csi_L(vc
, vc
->vc_par
[0]);
1798 csi_M(vc
, vc
->vc_par
[0]);
1801 csi_P(vc
, vc
->vc_par
[0]);
1809 vc
->vc_tab_stop
[vc
->vc_x
>> 5] &= ~(1 << (vc
->vc_x
& 31));
1810 else if (vc
->vc_par
[0] == 3) {
1811 vc
->vc_tab_stop
[0] =
1812 vc
->vc_tab_stop
[1] =
1813 vc
->vc_tab_stop
[2] =
1814 vc
->vc_tab_stop
[3] =
1815 vc
->vc_tab_stop
[4] = 0;
1821 case 'q': /* DECLL - but only 3 leds */
1822 /* map 0,1,2,3 to 0,1,2,4 */
1823 if (vc
->vc_par
[0] < 4)
1824 setledstate(kbd_table
+ vc
->vc_num
,
1825 (vc
->vc_par
[0] < 3) ? vc
->vc_par
[0] : 4);
1831 vc
->vc_par
[1] = vc
->vc_rows
;
1832 /* Minimum allowed region is 2 lines */
1833 if (vc
->vc_par
[0] < vc
->vc_par
[1] &&
1834 vc
->vc_par
[1] <= vc
->vc_rows
) {
1835 vc
->vc_top
= vc
->vc_par
[0] - 1;
1836 vc
->vc_bottom
= vc
->vc_par
[1];
1847 csi_X(vc
, vc
->vc_par
[0]);
1850 csi_at(vc
, vc
->vc_par
[0]);
1852 case ']': /* setterm functions */
1853 setterm_command(vc
);
1858 vc
->vc_state
= ESnormal
;
1860 case '@': /* defined in ISO 2022 */
1863 case 'G': /* prelim official escape code */
1864 case '8': /* retained for compatibility */
1870 vc
->vc_state
= ESnormal
;
1873 vc
->vc_state
= ESnormal
;
1875 /* DEC screen alignment test. kludge :-) */
1876 vc
->vc_video_erase_char
=
1877 (vc
->vc_video_erase_char
& 0xff00) | 'E';
1879 vc
->vc_video_erase_char
=
1880 (vc
->vc_video_erase_char
& 0xff00) | ' ';
1881 do_update_region(vc
, vc
->vc_origin
, vc
->vc_screenbuf_size
/ 2);
1886 vc
->vc_G0_charset
= GRAF_MAP
;
1888 vc
->vc_G0_charset
= LAT1_MAP
;
1890 vc
->vc_G0_charset
= IBMPC_MAP
;
1892 vc
->vc_G0_charset
= USER_MAP
;
1893 if (vc
->vc_charset
== 0)
1894 vc
->vc_translate
= set_translate(vc
->vc_G0_charset
, vc
);
1895 vc
->vc_state
= ESnormal
;
1899 vc
->vc_G1_charset
= GRAF_MAP
;
1901 vc
->vc_G1_charset
= LAT1_MAP
;
1903 vc
->vc_G1_charset
= IBMPC_MAP
;
1905 vc
->vc_G1_charset
= USER_MAP
;
1906 if (vc
->vc_charset
== 1)
1907 vc
->vc_translate
= set_translate(vc
->vc_G1_charset
, vc
);
1908 vc
->vc_state
= ESnormal
;
1911 vc
->vc_state
= ESnormal
;
1915 /* This is a temporary buffer used to prepare a tty console write
1916 * so that we can easily avoid touching user space while holding the
1917 * console spinlock. It is allocated in con_init and is shared by
1918 * this code and the vc_screen read/write tty calls.
1920 * We have to allocate this statically in the kernel data section
1921 * since console_init (and thus con_init) are called before any
1922 * kernel memory allocation is available.
1924 char con_buf
[CON_BUF_SIZE
];
1925 DECLARE_MUTEX(con_buf_sem
);
1927 /* acquires console_sem */
1928 static int do_con_write(struct tty_struct
*tty
, const unsigned char *buf
, int count
)
1930 #ifdef VT_BUF_VRAM_ONLY
1931 #define FLUSH do { } while(0);
1933 #define FLUSH if (draw_x >= 0) { \
1934 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
1939 int c
, tc
, ok
, n
= 0, draw_x
= -1;
1940 unsigned int currcons
;
1941 unsigned long draw_from
= 0, draw_to
= 0;
1943 u16 himask
, charmask
;
1944 const unsigned char *orig_buf
= NULL
;
1952 acquire_console_sem();
1953 vc
= tty
->driver_data
;
1955 printk(KERN_ERR
"vt: argh, driver_data is NULL !\n");
1956 release_console_sem();
1960 currcons
= vc
->vc_num
;
1961 if (!vc_cons_allocated(currcons
)) {
1962 /* could this happen? */
1963 static int error
= 0;
1966 printk("con_write: tty %d not allocated\n", currcons
+1);
1968 release_console_sem();
1971 release_console_sem();
1976 /* At this point 'buf' is guaranteed to be a kernel buffer
1977 * and therefore no access to userspace (and therefore sleeping)
1978 * will be needed. The con_buf_sem serializes all tty based
1979 * console rendering and vcs write/read operations. We hold
1980 * the console spinlock during the entire write.
1983 acquire_console_sem();
1985 vc
= tty
->driver_data
;
1987 printk(KERN_ERR
"vt: argh, driver_data _became_ NULL !\n");
1988 release_console_sem();
1992 himask
= vc
->vc_hi_font_mask
;
1993 charmask
= himask
? 0x1ff : 0xff;
1995 /* undraw cursor first */
1999 while (!tty
->stopped
&& count
) {
2006 /* Do no translation at all in control states */
2007 if (vc
->vc_state
!= ESnormal
) {
2009 } else if (vc
->vc_utf
) {
2010 /* Combine UTF-8 into Unicode */
2011 /* Incomplete characters silently ignored */
2013 if (vc
->vc_utf_count
> 0 && (c
& 0xc0) == 0x80) {
2014 vc
->vc_utf_char
= (vc
->vc_utf_char
<< 6) | (c
& 0x3f);
2016 if (vc
->vc_utf_count
== 0)
2017 tc
= c
= vc
->vc_utf_char
;
2020 if ((c
& 0xe0) == 0xc0) {
2021 vc
->vc_utf_count
= 1;
2022 vc
->vc_utf_char
= (c
& 0x1f);
2023 } else if ((c
& 0xf0) == 0xe0) {
2024 vc
->vc_utf_count
= 2;
2025 vc
->vc_utf_char
= (c
& 0x0f);
2026 } else if ((c
& 0xf8) == 0xf0) {
2027 vc
->vc_utf_count
= 3;
2028 vc
->vc_utf_char
= (c
& 0x07);
2029 } else if ((c
& 0xfc) == 0xf8) {
2030 vc
->vc_utf_count
= 4;
2031 vc
->vc_utf_char
= (c
& 0x03);
2032 } else if ((c
& 0xfe) == 0xfc) {
2033 vc
->vc_utf_count
= 5;
2034 vc
->vc_utf_char
= (c
& 0x01);
2036 vc
->vc_utf_count
= 0;
2041 vc
->vc_utf_count
= 0;
2043 } else { /* no utf */
2044 tc
= vc
->vc_translate
[vc
->vc_toggle_meta
? (c
| 0x80) : c
];
2047 /* If the original code was a control character we
2048 * only allow a glyph to be displayed if the code is
2049 * not normally used (such as for cursor movement) or
2050 * if the disp_ctrl mode has been explicitly enabled.
2051 * Certain characters (as given by the CTRL_ALWAYS
2052 * bitmap) are always displayed as control characters,
2053 * as the console would be pretty useless without
2054 * them; to display an arbitrary font position use the
2055 * direct-to-font zone in UTF-8 mode.
2057 ok
= tc
&& (c
>= 32 ||
2058 (!vc
->vc_utf
&& !(((vc
->vc_disp_ctrl
? CTRL_ALWAYS
2059 : CTRL_ACTION
) >> c
) & 1)))
2060 && (c
!= 127 || vc
->vc_disp_ctrl
)
2063 if (vc
->vc_state
== ESnormal
&& ok
) {
2064 /* Now try to find out how to display it */
2065 tc
= conv_uni_to_pc(vc
, tc
);
2067 /* If we got -4 (not found) then see if we have
2068 defined a replacement character (U+FFFD) */
2069 tc
= conv_uni_to_pc(vc
, 0xfffd);
2071 /* One reason for the -4 can be that we just
2072 did a clear_unimap();
2073 try at least to show something. */
2076 } else if ( tc
== -3 ) {
2077 /* Bad hash table -- hope for the best */
2081 continue; /* Conversion failed */
2083 if (vc
->vc_need_wrap
|| vc
->vc_decim
)
2085 if (vc
->vc_need_wrap
) {
2092 ((vc
->vc_attr
<< 8) & ~himask
) + ((tc
& 0x100) ? himask
: 0) + (tc
& 0xff) :
2093 (vc
->vc_attr
<< 8) + tc
,
2094 (u16
*) vc
->vc_pos
);
2095 if (DO_UPDATE(vc
) && draw_x
< 0) {
2097 draw_from
= vc
->vc_pos
;
2099 if (vc
->vc_x
== vc
->vc_cols
- 1) {
2100 vc
->vc_need_wrap
= vc
->vc_decawm
;
2101 draw_to
= vc
->vc_pos
+ 2;
2104 draw_to
= (vc
->vc_pos
+= 2);
2109 do_con_trol(tty
, vc
, orig
);
2112 console_conditional_schedule();
2113 release_console_sem();
2121 * This is the console switching callback.
2123 * Doing console switching in a process context allows
2124 * us to do the switches asynchronously (needed when we want
2125 * to switch due to a keyboard interrupt). Synchronization
2126 * with other console code and prevention of re-entrancy is
2127 * ensured with console_sem.
2129 static void console_callback(void *ignored
)
2131 acquire_console_sem();
2133 if (want_console
>= 0) {
2134 if (want_console
!= fg_console
&&
2135 vc_cons_allocated(want_console
)) {
2136 hide_cursor(vc_cons
[fg_console
].d
);
2137 change_console(vc_cons
[want_console
].d
);
2138 /* we only changed when the console had already
2139 been allocated - a new console is not created
2140 in an interrupt routine */
2144 if (do_poke_blanked_console
) { /* do not unblank for a LED change */
2145 do_poke_blanked_console
= 0;
2146 poke_blanked_console();
2148 if (scrollback_delta
) {
2149 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
2151 if (vc
->vc_mode
== KD_TEXT
)
2152 vc
->vc_sw
->con_scrolldelta(vc
, scrollback_delta
);
2153 scrollback_delta
= 0;
2155 if (blank_timer_expired
) {
2157 blank_timer_expired
= 0;
2160 release_console_sem();
2163 void set_console(int nr
)
2166 schedule_console_callback();
2169 struct tty_driver
*console_driver
;
2171 #ifdef CONFIG_VT_CONSOLE
2174 * Console on virtual terminal
2176 * The console must be locked when we get here.
2179 static void vt_console_print(struct console
*co
, const char *b
, unsigned count
)
2181 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
2183 static unsigned long printing
;
2184 const ushort
*start
;
2188 /* console busy or not yet initialized */
2189 if (!printable
|| test_and_set_bit(0, &printing
))
2192 if (kmsg_redirect
&& vc_cons_allocated(kmsg_redirect
- 1))
2193 vc
= vc_cons
[kmsg_redirect
- 1].d
;
2195 /* read `x' only after setting currcons properly (otherwise
2196 the `x' macro will read the x of the foreground console). */
2199 if (!vc_cons_allocated(fg_console
)) {
2201 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2205 if (vc
->vc_mode
!= KD_TEXT
)
2208 /* undraw cursor first */
2212 start
= (ushort
*)vc
->vc_pos
;
2214 /* Contrived structure to try to emulate original need_wrap behaviour
2215 * Problems caused when we have need_wrap set on '\n' character */
2218 if (c
== 10 || c
== 13 || c
== 8 || vc
->vc_need_wrap
) {
2220 if (CON_IS_VISIBLE(vc
))
2221 vc
->vc_sw
->con_putcs(vc
, start
, cnt
, vc
->vc_y
, vc
->vc_x
);
2223 if (vc
->vc_need_wrap
)
2227 if (c
== 8) { /* backspace */
2229 start
= (ushort
*)vc
->vc_pos
;
2236 start
= (ushort
*)vc
->vc_pos
;
2238 if (c
== 10 || c
== 13)
2241 scr_writew((vc
->vc_attr
<< 8) + c
, (unsigned short *)vc
->vc_pos
);
2243 if (myx
== vc
->vc_cols
- 1) {
2244 vc
->vc_need_wrap
= 1;
2251 if (CON_IS_VISIBLE(vc
))
2252 vc
->vc_sw
->con_putcs(vc
, start
, cnt
, vc
->vc_y
, vc
->vc_x
);
2254 if (vc
->vc_x
== vc
->vc_cols
) {
2256 vc
->vc_need_wrap
= 1;
2262 clear_bit(0, &printing
);
2265 static struct tty_driver
*vt_console_device(struct console
*c
, int *index
)
2267 *index
= c
->index
? c
->index
-1 : fg_console
;
2268 return console_driver
;
2271 static struct console vt_console_driver
= {
2273 .write
= vt_console_print
,
2274 .device
= vt_console_device
,
2275 .unblank
= unblank_screen
,
2276 .flags
= CON_PRINTBUFFER
,
2282 * Handling of Linux-specific VC ioctls
2286 * Generally a bit racy with respect to console_sem().
2288 * There are some functions which don't need it.
2290 * There are some functions which can sleep for arbitrary periods
2291 * (paste_selection) but we don't need the lock there anyway.
2293 * set_selection has locking, and definitely needs it
2296 int tioclinux(struct tty_struct
*tty
, unsigned long arg
)
2299 char __user
*p
= (char __user
*)arg
;
2303 if (tty
->driver
->type
!= TTY_DRIVER_TYPE_CONSOLE
)
2305 if (current
->signal
->tty
!= tty
&& !capable(CAP_SYS_ADMIN
))
2307 if (get_user(type
, p
))
2313 acquire_console_sem();
2314 ret
= set_selection((struct tiocl_selection __user
*)(p
+1), tty
);
2315 release_console_sem();
2317 case TIOCL_PASTESEL
:
2318 ret
= paste_selection(tty
);
2320 case TIOCL_UNBLANKSCREEN
:
2321 acquire_console_sem();
2323 release_console_sem();
2325 case TIOCL_SELLOADLUT
:
2326 ret
= sel_loadlut(p
);
2328 case TIOCL_GETSHIFTSTATE
:
2331 * Make it possible to react to Shift+Mousebutton.
2332 * Note that 'shift_state' is an undocumented
2333 * kernel-internal variable; programs not closely
2334 * related to the kernel should not use this.
2337 ret
= __put_user(data
, p
);
2339 case TIOCL_GETMOUSEREPORTING
:
2340 data
= mouse_reporting();
2341 ret
= __put_user(data
, p
);
2343 case TIOCL_SETVESABLANK
:
2344 set_vesa_blanking(p
);
2346 case TIOCL_GETKMSGREDIRECT
:
2347 data
= kmsg_redirect
;
2348 ret
= __put_user(data
, p
);
2350 case TIOCL_SETKMSGREDIRECT
:
2351 if (!capable(CAP_SYS_ADMIN
)) {
2354 if (get_user(data
, p
+1))
2357 kmsg_redirect
= data
;
2360 case TIOCL_GETFGCONSOLE
:
2363 case TIOCL_SCROLLCONSOLE
:
2364 if (get_user(lines
, (s32 __user
*)(p
+4))) {
2367 scrollfront(vc_cons
[fg_console
].d
, lines
);
2371 case TIOCL_BLANKSCREEN
: /* until explicitly unblanked, not only poked */
2372 acquire_console_sem();
2375 release_console_sem();
2377 case TIOCL_BLANKEDSCREEN
:
2378 ret
= console_blanked
;
2388 * /dev/ttyN handling
2391 static int con_write(struct tty_struct
*tty
, const unsigned char *buf
, int count
)
2395 retval
= do_con_write(tty
, buf
, count
);
2396 con_flush_chars(tty
);
2401 static void con_put_char(struct tty_struct
*tty
, unsigned char ch
)
2404 return; /* n_r3964 calls put_char() from interrupt context */
2405 do_con_write(tty
, &ch
, 1);
2408 static int con_write_room(struct tty_struct
*tty
)
2412 return 4096; /* No limit, really; we're not buffering */
2415 static int con_chars_in_buffer(struct tty_struct
*tty
)
2417 return 0; /* we're not buffering */
2421 * con_throttle and con_unthrottle are only used for
2422 * paste_selection(), which has to stuff in a large number of
2425 static void con_throttle(struct tty_struct
*tty
)
2429 static void con_unthrottle(struct tty_struct
*tty
)
2431 struct vc_data
*vc
= tty
->driver_data
;
2433 wake_up_interruptible(&vc
->paste_wait
);
2437 * Turn the Scroll-Lock LED on when the tty is stopped
2439 static void con_stop(struct tty_struct
*tty
)
2444 console_num
= tty
->index
;
2445 if (!vc_cons_allocated(console_num
))
2447 set_vc_kbd_led(kbd_table
+ console_num
, VC_SCROLLOCK
);
2452 * Turn the Scroll-Lock LED off when the console is started
2454 static void con_start(struct tty_struct
*tty
)
2459 console_num
= tty
->index
;
2460 if (!vc_cons_allocated(console_num
))
2462 clr_vc_kbd_led(kbd_table
+ console_num
, VC_SCROLLOCK
);
2466 static void con_flush_chars(struct tty_struct
*tty
)
2470 if (in_interrupt()) /* from flush_to_ldisc */
2473 /* if we race with con_close(), vt may be null */
2474 acquire_console_sem();
2475 vc
= tty
->driver_data
;
2478 release_console_sem();
2482 * Allocate the console screen memory.
2484 static int con_open(struct tty_struct
*tty
, struct file
*filp
)
2486 unsigned int currcons
= tty
->index
;
2489 acquire_console_sem();
2490 if (tty
->driver_data
== NULL
) {
2491 ret
= vc_allocate(currcons
);
2493 struct vc_data
*vc
= vc_cons
[currcons
].d
;
2494 tty
->driver_data
= vc
;
2497 if (!tty
->winsize
.ws_row
&& !tty
->winsize
.ws_col
) {
2498 tty
->winsize
.ws_row
= vc_cons
[currcons
].d
->vc_rows
;
2499 tty
->winsize
.ws_col
= vc_cons
[currcons
].d
->vc_cols
;
2501 release_console_sem();
2502 vcs_make_devfs(tty
);
2506 release_console_sem();
2511 * We take tty_mutex in here to prevent another thread from coming in via init_dev
2512 * and taking a ref against the tty while we're in the process of forgetting
2513 * about it and cleaning things up.
2515 * This is because vcs_remove_devfs() can sleep and will drop the BKL.
2517 static void con_close(struct tty_struct
*tty
, struct file
*filp
)
2519 mutex_lock(&tty_mutex
);
2520 acquire_console_sem();
2521 if (tty
&& tty
->count
== 1) {
2522 struct vc_data
*vc
= tty
->driver_data
;
2526 tty
->driver_data
= NULL
;
2527 release_console_sem();
2528 vcs_remove_devfs(tty
);
2529 mutex_unlock(&tty_mutex
);
2531 * tty_mutex is released, but we still hold BKL, so there is
2532 * still exclusion against init_dev()
2536 release_console_sem();
2537 mutex_unlock(&tty_mutex
);
2540 static void vc_init(struct vc_data
*vc
, unsigned int rows
,
2541 unsigned int cols
, int do_clear
)
2547 vc
->vc_size_row
= cols
<< 1;
2548 vc
->vc_screenbuf_size
= vc
->vc_rows
* vc
->vc_size_row
;
2551 vc
->vc_pos
= vc
->vc_origin
;
2553 for (j
=k
=0; j
<16; j
++) {
2554 vc
->vc_palette
[k
++] = default_red
[j
] ;
2555 vc
->vc_palette
[k
++] = default_grn
[j
] ;
2556 vc
->vc_palette
[k
++] = default_blu
[j
] ;
2558 vc
->vc_def_color
= 0x07; /* white */
2559 vc
->vc_ulcolor
= 0x0f; /* bold white */
2560 vc
->vc_halfcolor
= 0x08; /* grey */
2561 init_waitqueue_head(&vc
->paste_wait
);
2562 reset_terminal(vc
, do_clear
);
2566 * This routine initializes console interrupts, and does nothing
2567 * else. If you want the screen to clear, call tty_write with
2568 * the appropriate escape-sequence.
2571 static int __init
con_init(void)
2573 const char *display_desc
= NULL
;
2575 unsigned int currcons
= 0, i
;
2577 acquire_console_sem();
2580 display_desc
= conswitchp
->con_startup();
2581 if (!display_desc
) {
2583 release_console_sem();
2587 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
2588 struct con_driver
*con_driver
= ®istered_con_driver
[i
];
2590 if (con_driver
->con
== NULL
) {
2591 con_driver
->con
= conswitchp
;
2592 con_driver
->desc
= display_desc
;
2593 con_driver
->flag
= CON_DRIVER_FLAG_INIT
;
2594 con_driver
->first
= 0;
2595 con_driver
->last
= MAX_NR_CONSOLES
- 1;
2600 for (i
= 0; i
< MAX_NR_CONSOLES
; i
++)
2601 con_driver_map
[i
] = conswitchp
;
2603 init_timer(&console_timer
);
2604 console_timer
.function
= blank_screen_t
;
2605 if (blankinterval
) {
2606 blank_state
= blank_normal_wait
;
2607 mod_timer(&console_timer
, jiffies
+ blankinterval
);
2611 * kmalloc is not running yet - we use the bootmem allocator.
2613 for (currcons
= 0; currcons
< MIN_NR_CONSOLES
; currcons
++) {
2614 vc_cons
[currcons
].d
= vc
= alloc_bootmem(sizeof(struct vc_data
));
2615 visual_init(vc
, currcons
, 1);
2616 vc
->vc_screenbuf
= (unsigned short *)alloc_bootmem(vc
->vc_screenbuf_size
);
2617 vc
->vc_kmalloced
= 0;
2618 vc_init(vc
, vc
->vc_rows
, vc
->vc_cols
,
2619 currcons
|| !vc
->vc_sw
->con_save_screen
);
2621 currcons
= fg_console
= 0;
2622 master_display_fg
= vc
= vc_cons
[currcons
].d
;
2625 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
);
2628 printk("Console: %s %s %dx%d",
2629 vc
->vc_can_do_color
? "colour" : "mono",
2630 display_desc
, vc
->vc_cols
, vc
->vc_rows
);
2634 release_console_sem();
2636 #ifdef CONFIG_VT_CONSOLE
2637 register_console(&vt_console_driver
);
2641 console_initcall(con_init
);
2643 static struct tty_operations con_ops
= {
2647 .write_room
= con_write_room
,
2648 .put_char
= con_put_char
,
2649 .flush_chars
= con_flush_chars
,
2650 .chars_in_buffer
= con_chars_in_buffer
,
2654 .throttle
= con_throttle
,
2655 .unthrottle
= con_unthrottle
,
2658 int __init
vty_init(void)
2662 console_driver
= alloc_tty_driver(MAX_NR_CONSOLES
);
2663 if (!console_driver
)
2664 panic("Couldn't allocate console driver\n");
2665 console_driver
->owner
= THIS_MODULE
;
2666 console_driver
->devfs_name
= "vc/";
2667 console_driver
->name
= "tty";
2668 console_driver
->name_base
= 1;
2669 console_driver
->major
= TTY_MAJOR
;
2670 console_driver
->minor_start
= 1;
2671 console_driver
->type
= TTY_DRIVER_TYPE_CONSOLE
;
2672 console_driver
->init_termios
= tty_std_termios
;
2673 console_driver
->flags
= TTY_DRIVER_REAL_RAW
| TTY_DRIVER_RESET_TERMIOS
;
2674 tty_set_operations(console_driver
, &con_ops
);
2675 if (tty_register_driver(console_driver
))
2676 panic("Couldn't register console driver\n");
2680 #ifdef CONFIG_PROM_CONSOLE
2683 #ifdef CONFIG_MDA_CONSOLE
2689 #ifndef VT_SINGLE_DRIVER
2690 #include <linux/device.h>
2692 static struct class *vtconsole_class
;
2694 static int bind_con_driver(const struct consw
*csw
, int first
, int last
,
2697 struct module
*owner
= csw
->owner
;
2698 const char *desc
= NULL
;
2699 struct con_driver
*con_driver
;
2700 int i
, j
= -1, k
= -1, retval
= -ENODEV
;
2702 if (!try_module_get(owner
))
2705 acquire_console_sem();
2707 /* check if driver is registered */
2708 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
2709 con_driver
= ®istered_con_driver
[i
];
2711 if (con_driver
->con
== csw
) {
2712 desc
= con_driver
->desc
;
2721 if (!(con_driver
->flag
& CON_DRIVER_FLAG_INIT
)) {
2723 con_driver
->flag
|= CON_DRIVER_FLAG_INIT
;
2728 module_put(conswitchp
->owner
);
2730 __module_get(owner
);
2734 first
= max(first
, con_driver
->first
);
2735 last
= min(last
, con_driver
->last
);
2737 for (i
= first
; i
<= last
; i
++) {
2739 struct vc_data
*vc
= vc_cons
[i
].d
;
2741 if (con_driver_map
[i
])
2742 module_put(con_driver_map
[i
]->owner
);
2743 __module_get(owner
);
2744 con_driver_map
[i
] = csw
;
2746 if (!vc
|| !vc
->vc_sw
)
2751 if (CON_IS_VISIBLE(vc
)) {
2756 old_was_color
= vc
->vc_can_do_color
;
2757 vc
->vc_sw
->con_deinit(vc
);
2758 vc
->vc_origin
= (unsigned long)vc
->vc_screenbuf
;
2759 visual_init(vc
, i
, 0);
2763 /* If the console changed between mono <-> color, then
2764 * the attributes in the screenbuf will be wrong. The
2765 * following resets all attributes to something sane.
2767 if (old_was_color
!= vc
->vc_can_do_color
)
2768 clear_buffer_attributes(vc
);
2771 printk("Console: switching ");
2773 printk("consoles %d-%d ", first
+1, last
+1);
2775 struct vc_data
*vc
= vc_cons
[j
].d
;
2777 printk("to %s %s %dx%d\n",
2778 vc
->vc_can_do_color
? "colour" : "mono",
2779 desc
, vc
->vc_cols
, vc
->vc_rows
);
2786 printk("to %s\n", desc
);
2790 release_console_sem();
2795 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
2796 static int con_is_graphics(const struct consw
*csw
, int first
, int last
)
2800 for (i
= first
; i
<= last
; i
++) {
2801 struct vc_data
*vc
= vc_cons
[i
].d
;
2803 if (vc
&& vc
->vc_mode
== KD_GRAPHICS
) {
2812 static int unbind_con_driver(const struct consw
*csw
, int first
, int last
,
2815 struct module
*owner
= csw
->owner
;
2816 const struct consw
*defcsw
= NULL
;
2817 struct con_driver
*con_driver
= NULL
, *con_back
= NULL
;
2818 int i
, retval
= -ENODEV
;
2820 if (!try_module_get(owner
))
2823 acquire_console_sem();
2825 /* check if driver is registered and if it is unbindable */
2826 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
2827 con_driver
= ®istered_con_driver
[i
];
2829 if (con_driver
->con
== csw
&&
2830 con_driver
->flag
& CON_DRIVER_FLAG_MODULE
) {
2837 release_console_sem();
2843 /* check if backup driver exists */
2844 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
2845 con_back
= ®istered_con_driver
[i
];
2847 if (con_back
->con
&&
2848 !(con_back
->flag
& CON_DRIVER_FLAG_MODULE
)) {
2849 defcsw
= con_back
->con
;
2856 release_console_sem();
2860 if (!con_is_bound(csw
)) {
2861 release_console_sem();
2865 first
= max(first
, con_driver
->first
);
2866 last
= min(last
, con_driver
->last
);
2868 for (i
= first
; i
<= last
; i
++) {
2869 if (con_driver_map
[i
] == csw
) {
2870 module_put(csw
->owner
);
2871 con_driver_map
[i
] = NULL
;
2875 if (!con_is_bound(defcsw
)) {
2876 const struct consw
*defconsw
= conswitchp
;
2878 defcsw
->con_startup();
2879 con_back
->flag
|= CON_DRIVER_FLAG_INIT
;
2881 * vgacon may change the default driver to point
2882 * to dummycon, we restore it here...
2884 conswitchp
= defconsw
;
2887 if (!con_is_bound(csw
))
2888 con_driver
->flag
&= ~CON_DRIVER_FLAG_INIT
;
2890 release_console_sem();
2891 /* ignore return value, binding should not fail */
2892 bind_con_driver(defcsw
, first
, last
, deflt
);
2899 static int vt_bind(struct con_driver
*con
)
2901 const struct consw
*defcsw
= NULL
, *csw
= NULL
;
2902 int i
, more
= 1, first
= -1, last
= -1, deflt
= 0;
2904 if (!con
->con
|| !(con
->flag
& CON_DRIVER_FLAG_MODULE
) ||
2905 con_is_graphics(con
->con
, con
->first
, con
->last
))
2910 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
2911 struct con_driver
*con
= ®istered_con_driver
[i
];
2913 if (con
->con
&& !(con
->flag
& CON_DRIVER_FLAG_MODULE
)) {
2925 for (i
= con
->first
; i
<= con
->last
; i
++) {
2926 if (con_driver_map
[i
] == defcsw
) {
2931 } else if (first
!= -1)
2935 if (first
== 0 && last
== MAX_NR_CONSOLES
-1)
2939 bind_con_driver(csw
, first
, last
, deflt
);
2950 static int vt_unbind(struct con_driver
*con
)
2952 const struct consw
*csw
= NULL
;
2953 int i
, more
= 1, first
= -1, last
= -1, deflt
= 0;
2955 if (!con
->con
|| !(con
->flag
& CON_DRIVER_FLAG_MODULE
) ||
2956 con_is_graphics(con
->con
, con
->first
, con
->last
))
2964 for (i
= con
->first
; i
<= con
->last
; i
++) {
2965 if (con_driver_map
[i
] == csw
) {
2970 } else if (first
!= -1)
2974 if (first
== 0 && last
== MAX_NR_CONSOLES
-1)
2978 unbind_con_driver(csw
, first
, last
, deflt
);
2989 static inline int vt_bind(struct con_driver
*con
)
2993 static inline int vt_unbind(struct con_driver
*con
)
2997 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
2999 static ssize_t
store_bind(struct class_device
*class_device
,
3000 const char *buf
, size_t count
)
3002 struct con_driver
*con
= class_get_devdata(class_device
);
3003 int bind
= simple_strtoul(buf
, NULL
, 0);
3013 static ssize_t
show_bind(struct class_device
*class_device
, char *buf
)
3015 struct con_driver
*con
= class_get_devdata(class_device
);
3016 int bind
= con_is_bound(con
->con
);
3018 return snprintf(buf
, PAGE_SIZE
, "%i\n", bind
);
3021 static ssize_t
show_name(struct class_device
*class_device
, char *buf
)
3023 struct con_driver
*con
= class_get_devdata(class_device
);
3025 return snprintf(buf
, PAGE_SIZE
, "%s %s\n",
3026 (con
->flag
& CON_DRIVER_FLAG_MODULE
) ? "(M)" : "(S)",
3031 static struct class_device_attribute class_device_attrs
[] = {
3032 __ATTR(bind
, S_IRUGO
|S_IWUSR
, show_bind
, store_bind
),
3033 __ATTR(name
, S_IRUGO
, show_name
, NULL
),
3036 static int vtconsole_init_class_device(struct con_driver
*con
)
3040 class_set_devdata(con
->class_dev
, con
);
3041 for (i
= 0; i
< ARRAY_SIZE(class_device_attrs
); i
++)
3042 class_device_create_file(con
->class_dev
,
3043 &class_device_attrs
[i
]);
3048 static void vtconsole_deinit_class_device(struct con_driver
*con
)
3052 for (i
= 0; i
< ARRAY_SIZE(class_device_attrs
); i
++)
3053 class_device_remove_file(con
->class_dev
,
3054 &class_device_attrs
[i
]);
3058 * con_is_bound - checks if driver is bound to the console
3059 * @csw: console driver
3061 * RETURNS: zero if unbound, nonzero if bound
3063 * Drivers can call this and if zero, they should release
3064 * all resources allocated on con_startup()
3066 int con_is_bound(const struct consw
*csw
)
3070 for (i
= 0; i
< MAX_NR_CONSOLES
; i
++) {
3071 if (con_driver_map
[i
] == csw
) {
3079 EXPORT_SYMBOL(con_is_bound
);
3082 * register_con_driver - register console driver to console layer
3083 * @csw: console driver
3084 * @first: the first console to take over, minimum value is 0
3085 * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1
3087 * DESCRIPTION: This function registers a console driver which can later
3088 * bind to a range of consoles specified by @first and @last. It will
3089 * also initialize the console driver by calling con_startup().
3091 int register_con_driver(const struct consw
*csw
, int first
, int last
)
3093 struct module
*owner
= csw
->owner
;
3094 struct con_driver
*con_driver
;
3098 if (!try_module_get(owner
))
3101 acquire_console_sem();
3103 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3104 con_driver
= ®istered_con_driver
[i
];
3106 /* already registered */
3107 if (con_driver
->con
== csw
)
3114 desc
= csw
->con_startup();
3121 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3122 con_driver
= ®istered_con_driver
[i
];
3124 if (con_driver
->con
== NULL
) {
3125 con_driver
->con
= csw
;
3126 con_driver
->desc
= desc
;
3127 con_driver
->node
= i
;
3128 con_driver
->flag
= CON_DRIVER_FLAG_MODULE
|
3129 CON_DRIVER_FLAG_INIT
;
3130 con_driver
->first
= first
;
3131 con_driver
->last
= last
;
3140 con_driver
->class_dev
= class_device_create(vtconsole_class
, NULL
,
3141 MKDEV(0, con_driver
->node
),
3145 if (IS_ERR(con_driver
->class_dev
)) {
3146 printk(KERN_WARNING
"Unable to create class_device for %s; "
3147 "errno = %ld\n", con_driver
->desc
,
3148 PTR_ERR(con_driver
->class_dev
));
3149 con_driver
->class_dev
= NULL
;
3151 vtconsole_init_class_device(con_driver
);
3154 release_console_sem();
3158 EXPORT_SYMBOL(register_con_driver
);
3161 * unregister_con_driver - unregister console driver from console layer
3162 * @csw: console driver
3164 * DESCRIPTION: All drivers that registers to the console layer must
3165 * call this function upon exit, or if the console driver is in a state
3166 * where it won't be able to handle console services, such as the
3167 * framebuffer console without loaded framebuffer drivers.
3169 * The driver must unbind first prior to unregistration.
3171 int unregister_con_driver(const struct consw
*csw
)
3173 int i
, retval
= -ENODEV
;
3175 acquire_console_sem();
3177 /* cannot unregister a bound driver */
3178 if (con_is_bound(csw
))
3181 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3182 struct con_driver
*con_driver
= ®istered_con_driver
[i
];
3184 if (con_driver
->con
== csw
&&
3185 con_driver
->flag
& CON_DRIVER_FLAG_MODULE
) {
3186 vtconsole_deinit_class_device(con_driver
);
3187 class_device_destroy(vtconsole_class
,
3188 MKDEV(0, con_driver
->node
));
3189 con_driver
->con
= NULL
;
3190 con_driver
->desc
= NULL
;
3191 con_driver
->class_dev
= NULL
;
3192 con_driver
->node
= 0;
3193 con_driver
->flag
= 0;
3194 con_driver
->first
= 0;
3195 con_driver
->last
= 0;
3201 release_console_sem();
3204 EXPORT_SYMBOL(unregister_con_driver
);
3207 * If we support more console drivers, this function is used
3208 * when a driver wants to take over some existing consoles
3209 * and become default driver for newly opened ones.
3211 * take_over_console is basically a register followed by unbind
3213 int take_over_console(const struct consw
*csw
, int first
, int last
, int deflt
)
3217 err
= register_con_driver(csw
, first
, last
);
3220 bind_con_driver(csw
, first
, last
, deflt
);
3226 * give_up_console is a wrapper to unregister_con_driver. It will only
3227 * work if driver is fully unbound.
3229 void give_up_console(const struct consw
*csw
)
3231 unregister_con_driver(csw
);
3234 static int __init
vtconsole_class_init(void)
3238 vtconsole_class
= class_create(THIS_MODULE
, "vtconsole");
3239 if (IS_ERR(vtconsole_class
)) {
3240 printk(KERN_WARNING
"Unable to create vt console class; "
3241 "errno = %ld\n", PTR_ERR(vtconsole_class
));
3242 vtconsole_class
= NULL
;
3245 /* Add system drivers to sysfs */
3246 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3247 struct con_driver
*con
= ®istered_con_driver
[i
];
3249 if (con
->con
&& !con
->class_dev
) {
3251 class_device_create(vtconsole_class
, NULL
,
3252 MKDEV(0, con
->node
), NULL
,
3253 "vtcon%i", con
->node
);
3255 if (IS_ERR(con
->class_dev
)) {
3256 printk(KERN_WARNING
"Unable to create "
3257 "class_device for %s; errno = %ld\n",
3258 con
->desc
, PTR_ERR(con
->class_dev
));
3259 con
->class_dev
= NULL
;
3261 vtconsole_init_class_device(con
);
3268 postcore_initcall(vtconsole_class_init
);
3276 static void set_vesa_blanking(char __user
*p
)
3279 get_user(mode
, p
+ 1);
3280 vesa_blank_mode
= (mode
< 4) ? mode
: 0;
3283 void do_blank_screen(int entering_gfx
)
3285 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
3288 WARN_CONSOLE_UNLOCKED();
3290 if (console_blanked
) {
3291 if (blank_state
== blank_vesa_wait
) {
3292 blank_state
= blank_off
;
3293 vc
->vc_sw
->con_blank(vc
, vesa_blank_mode
+ 1, 0);
3297 if (blank_state
!= blank_normal_wait
)
3299 blank_state
= blank_off
;
3301 /* entering graphics mode? */
3305 vc
->vc_sw
->con_blank(vc
, -1, 1);
3306 console_blanked
= fg_console
+ 1;
3311 /* don't blank graphics */
3312 if (vc
->vc_mode
!= KD_TEXT
) {
3313 console_blanked
= fg_console
+ 1;
3318 del_timer_sync(&console_timer
);
3319 blank_timer_expired
= 0;
3322 /* In case we need to reset origin, blanking hook returns 1 */
3323 i
= vc
->vc_sw
->con_blank(vc
, vesa_off_interval
? 1 : (vesa_blank_mode
+ 1), 0);
3324 console_blanked
= fg_console
+ 1;
3328 if (console_blank_hook
&& console_blank_hook(1))
3331 if (vesa_off_interval
&& vesa_blank_mode
) {
3332 blank_state
= blank_vesa_wait
;
3333 mod_timer(&console_timer
, jiffies
+ vesa_off_interval
);
3336 EXPORT_SYMBOL(do_blank_screen
);
3339 * Called by timer as well as from vt_console_driver
3341 void do_unblank_screen(int leaving_gfx
)
3345 /* This should now always be called from a "sane" (read: can schedule)
3346 * context for the sake of the low level drivers, except in the special
3347 * case of oops_in_progress
3349 if (!oops_in_progress
)
3352 WARN_CONSOLE_UNLOCKED();
3355 if (!console_blanked
)
3357 if (!vc_cons_allocated(fg_console
)) {
3359 printk("unblank_screen: tty %d not allocated ??\n", fg_console
+1);
3362 vc
= vc_cons
[fg_console
].d
;
3363 if (vc
->vc_mode
!= KD_TEXT
)
3364 return; /* but leave console_blanked != 0 */
3366 if (blankinterval
) {
3367 mod_timer(&console_timer
, jiffies
+ blankinterval
);
3368 blank_state
= blank_normal_wait
;
3371 console_blanked
= 0;
3372 if (vc
->vc_sw
->con_blank(vc
, 0, leaving_gfx
))
3373 /* Low-level driver cannot restore -> do it ourselves */
3375 if (console_blank_hook
)
3376 console_blank_hook(0);
3380 EXPORT_SYMBOL(do_unblank_screen
);
3383 * This is called by the outside world to cause a forced unblank, mostly for
3384 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
3385 * call it with 1 as an argument and so force a mode restore... that may kill
3386 * X or at least garbage the screen but would also make the Oops visible...
3388 void unblank_screen(void)
3390 do_unblank_screen(0);
3394 * We defer the timer blanking to work queue so it can take the console mutex
3395 * (console operations can still happen at irq time, but only from printk which
3396 * has the console mutex. Not perfect yet, but better than no locking
3398 static void blank_screen_t(unsigned long dummy
)
3400 if (unlikely(!keventd_up())) {
3401 mod_timer(&console_timer
, jiffies
+ blankinterval
);
3404 blank_timer_expired
= 1;
3405 schedule_work(&console_work
);
3408 void poke_blanked_console(void)
3410 WARN_CONSOLE_UNLOCKED();
3412 /* Add this so we quickly catch whoever might call us in a non
3413 * safe context. Nowadays, unblank_screen() isn't to be called in
3414 * atomic contexts and is allowed to schedule (with the special case
3415 * of oops_in_progress, but that isn't of any concern for this
3420 /* This isn't perfectly race free, but a race here would be mostly harmless,
3421 * at worse, we'll do a spurrious blank and it's unlikely
3423 del_timer(&console_timer
);
3424 blank_timer_expired
= 0;
3426 if (ignore_poke
|| !vc_cons
[fg_console
].d
|| vc_cons
[fg_console
].d
->vc_mode
== KD_GRAPHICS
)
3428 if (console_blanked
)
3430 else if (blankinterval
) {
3431 mod_timer(&console_timer
, jiffies
+ blankinterval
);
3432 blank_state
= blank_normal_wait
;
3440 static void set_palette(struct vc_data
*vc
)
3442 WARN_CONSOLE_UNLOCKED();
3444 if (vc
->vc_mode
!= KD_GRAPHICS
)
3445 vc
->vc_sw
->con_set_palette(vc
, color_table
);
3448 static int set_get_cmap(unsigned char __user
*arg
, int set
)
3452 WARN_CONSOLE_UNLOCKED();
3454 for (i
= 0; i
< 16; i
++)
3456 get_user(default_red
[i
], arg
++);
3457 get_user(default_grn
[i
], arg
++);
3458 get_user(default_blu
[i
], arg
++);
3460 put_user(default_red
[i
], arg
++);
3461 put_user(default_grn
[i
], arg
++);
3462 put_user(default_blu
[i
], arg
++);
3465 for (i
= 0; i
< MAX_NR_CONSOLES
; i
++)
3466 if (vc_cons_allocated(i
)) {
3467 for (j
= k
= 0; j
< 16; j
++) {
3468 vc_cons
[i
].d
->vc_palette
[k
++] = default_red
[j
];
3469 vc_cons
[i
].d
->vc_palette
[k
++] = default_grn
[j
];
3470 vc_cons
[i
].d
->vc_palette
[k
++] = default_blu
[j
];
3472 set_palette(vc_cons
[i
].d
);
3479 * Load palette into the DAC registers. arg points to a colour
3480 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
3483 int con_set_cmap(unsigned char __user
*arg
)
3487 acquire_console_sem();
3488 rc
= set_get_cmap (arg
,1);
3489 release_console_sem();
3494 int con_get_cmap(unsigned char __user
*arg
)
3498 acquire_console_sem();
3499 rc
= set_get_cmap (arg
,0);
3500 release_console_sem();
3505 void reset_palette(struct vc_data
*vc
)
3508 for (j
=k
=0; j
<16; j
++) {
3509 vc
->vc_palette
[k
++] = default_red
[j
];
3510 vc
->vc_palette
[k
++] = default_grn
[j
];
3511 vc
->vc_palette
[k
++] = default_blu
[j
];
3519 * Currently we only support fonts up to 32 pixels wide, at a maximum height
3520 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
3521 * depending on width) reserved for each character which is kinda wasty, but
3522 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
3523 * is upto the actual low-level console-driver convert data into its favorite
3524 * format (maybe we should add a `fontoffset' field to the `display'
3525 * structure so we won't have to convert the fontdata all the time.
3529 #define max_font_size 65536
3531 static int con_font_get(struct vc_data
*vc
, struct console_font_op
*op
)
3533 struct console_font font
;
3537 if (vc
->vc_mode
!= KD_TEXT
)
3541 font
.data
= kmalloc(max_font_size
, GFP_KERNEL
);
3547 acquire_console_sem();
3548 if (vc
->vc_sw
->con_font_get
)
3549 rc
= vc
->vc_sw
->con_font_get(vc
, &font
);
3552 release_console_sem();
3557 c
= (font
.width
+7)/8 * 32 * font
.charcount
;
3559 if (op
->data
&& font
.charcount
> op
->charcount
)
3561 if (!(op
->flags
& KD_FONT_FLAG_OLD
)) {
3562 if (font
.width
> op
->width
|| font
.height
> op
->height
)
3565 if (font
.width
!= 8)
3567 else if ((op
->height
&& font
.height
> op
->height
) ||
3574 op
->height
= font
.height
;
3575 op
->width
= font
.width
;
3576 op
->charcount
= font
.charcount
;
3578 if (op
->data
&& copy_to_user(op
->data
, font
.data
, c
))
3586 static int con_font_set(struct vc_data
*vc
, struct console_font_op
*op
)
3588 struct console_font font
;
3592 if (vc
->vc_mode
!= KD_TEXT
)
3596 if (op
->charcount
> 512)
3598 if (!op
->height
) { /* Need to guess font height [compat] */
3600 u8 __user
*charmap
= op
->data
;
3603 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
3604 so that we can get rid of this soon */
3605 if (!(op
->flags
& KD_FONT_FLAG_OLD
))
3607 for (h
= 32; h
> 0; h
--)
3608 for (i
= 0; i
< op
->charcount
; i
++) {
3609 if (get_user(tmp
, &charmap
[32*i
+h
-1]))
3618 if (op
->width
<= 0 || op
->width
> 32 || op
->height
> 32)
3620 size
= (op
->width
+7)/8 * 32 * op
->charcount
;
3621 if (size
> max_font_size
)
3623 font
.charcount
= op
->charcount
;
3624 font
.height
= op
->height
;
3625 font
.width
= op
->width
;
3626 font
.data
= kmalloc(size
, GFP_KERNEL
);
3629 if (copy_from_user(font
.data
, op
->data
, size
)) {
3633 acquire_console_sem();
3634 if (vc
->vc_sw
->con_font_set
)
3635 rc
= vc
->vc_sw
->con_font_set(vc
, &font
, op
->flags
);
3638 release_console_sem();
3643 static int con_font_default(struct vc_data
*vc
, struct console_font_op
*op
)
3645 struct console_font font
= {.width
= op
->width
, .height
= op
->height
};
3646 char name
[MAX_FONT_NAME
];
3650 if (vc
->vc_mode
!= KD_TEXT
)
3655 else if (strncpy_from_user(name
, op
->data
, MAX_FONT_NAME
- 1) < 0)
3658 name
[MAX_FONT_NAME
- 1] = 0;
3660 acquire_console_sem();
3661 if (vc
->vc_sw
->con_font_default
)
3662 rc
= vc
->vc_sw
->con_font_default(vc
, &font
, s
);
3665 release_console_sem();
3667 op
->width
= font
.width
;
3668 op
->height
= font
.height
;
3673 static int con_font_copy(struct vc_data
*vc
, struct console_font_op
*op
)
3675 int con
= op
->height
;
3678 if (vc
->vc_mode
!= KD_TEXT
)
3681 acquire_console_sem();
3682 if (!vc
->vc_sw
->con_font_copy
)
3684 else if (con
< 0 || !vc_cons_allocated(con
))
3686 else if (con
== vc
->vc_num
) /* nothing to do */
3689 rc
= vc
->vc_sw
->con_font_copy(vc
, con
);
3690 release_console_sem();
3694 int con_font_op(struct vc_data
*vc
, struct console_font_op
*op
)
3697 case KD_FONT_OP_SET
:
3698 return con_font_set(vc
, op
);
3699 case KD_FONT_OP_GET
:
3700 return con_font_get(vc
, op
);
3701 case KD_FONT_OP_SET_DEFAULT
:
3702 return con_font_default(vc
, op
);
3703 case KD_FONT_OP_COPY
:
3704 return con_font_copy(vc
, op
);
3710 * Interface exported to selection and vcs.
3713 /* used by selection */
3714 u16
screen_glyph(struct vc_data
*vc
, int offset
)
3716 u16 w
= scr_readw(screenpos(vc
, offset
, 1));
3719 if (w
& vc
->vc_hi_font_mask
)
3724 /* used by vcs - note the word offset */
3725 unsigned short *screen_pos(struct vc_data
*vc
, int w_offset
, int viewed
)
3727 return screenpos(vc
, 2 * w_offset
, viewed
);
3730 void getconsxy(struct vc_data
*vc
, unsigned char *p
)
3736 void putconsxy(struct vc_data
*vc
, unsigned char *p
)
3739 gotoxy(vc
, p
[0], p
[1]);
3743 u16
vcs_scr_readw(struct vc_data
*vc
, const u16
*org
)
3745 if ((unsigned long)org
== vc
->vc_pos
&& softcursor_original
!= -1)
3746 return softcursor_original
;
3747 return scr_readw(org
);
3750 void vcs_scr_writew(struct vc_data
*vc
, u16 val
, u16
*org
)
3752 scr_writew(val
, org
);
3753 if ((unsigned long)org
== vc
->vc_pos
) {
3754 softcursor_original
= -1;
3760 * Visible symbols for modules
3763 EXPORT_SYMBOL(color_table
);
3764 EXPORT_SYMBOL(default_red
);
3765 EXPORT_SYMBOL(default_grn
);
3766 EXPORT_SYMBOL(default_blu
);
3767 EXPORT_SYMBOL(update_region
);
3768 EXPORT_SYMBOL(redraw_screen
);
3769 EXPORT_SYMBOL(vc_resize
);
3770 EXPORT_SYMBOL(fg_console
);
3771 EXPORT_SYMBOL(console_blank_hook
);
3772 EXPORT_SYMBOL(console_blanked
);
3773 EXPORT_SYMBOL(vc_cons
);
3774 #ifndef VT_SINGLE_DRIVER
3775 EXPORT_SYMBOL(take_over_console
);
3776 EXPORT_SYMBOL(give_up_console
);