2 * linux/drivers/char/vt.c
4 * Copyright (C) 1991, 1992 Linus Torvalds
8 * Hopefully this will be a rather complete VT102 implementation.
10 * Beeping thanks to John T Kohl.
12 * Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics
13 * Chars, and VT100 enhancements by Peter MacDonald.
15 * Copy and paste function by Andrew Haylett,
16 * some enhancements by Alessandro Rubini.
18 * Code to check for different video-cards mostly by Galen Hunt,
19 * <g-hunt@ee.utah.edu>
21 * Rudimentary ISO 10646/Unicode/UTF-8 character set support by
22 * Markus Kuhn, <mskuhn@immd4.informatik.uni-erlangen.de>.
24 * Dynamic allocation of consoles, aeb@cwi.nl, May 1994
25 * Resizing of consoles, aeb, 940926
27 * Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94
30 * User-defined bell sound, new setterm control sequences and printk
31 * redirection by Martin Mares <mj@k332.feld.cvut.cz> 19-Nov-95
33 * APM screenblank bug fixed Takashi Manabe <manabe@roy.dsl.tutics.tut.jp>
35 * Merge with the abstract console driver by Geert Uytterhoeven
36 * <geert@linux-m68k.org>, Jan 1997.
38 * Original m68k console driver modifications by
40 * - Arno Griffioen <arno@usn.nl>
41 * - David Carter <carter@cs.bris.ac.uk>
43 * The abstract console driver provides a generic interface for a text
44 * console. It supports VGA text mode, frame buffer based graphical consoles
45 * and special graphics processors that are only accessible through some
46 * registers (e.g. a TMS340x0 GSP).
48 * The interface to the hardware is specified using a special structure
49 * (struct consw) which contains function pointers to console operations
50 * (see <linux/console.h> for more information).
52 * Support for changeable cursor shape
53 * by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997
55 * Ported to i386 and con_scrolldelta fixed
56 * by Emmanuel Marty <core@ggi-project.org>, April 1998
58 * Resurrected character buffers in videoram plus lots of other trickery
59 * by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998
61 * Removed old-style timers, introduced console_timer, made timer
62 * deletion SMP-safe. 17Jun00, Andrew Morton <andrewm@uow.edu.au>
64 * Removed console_lock, enabled interrupts across all console operations
65 * 13 March 2001, Andrew Morton
67 * Fixed UTF-8 mode so alternate charset modes always work according
68 * to control sequences interpreted in do_con_trol function
69 * preserving backward VT100 semigraphics compatibility,
70 * malformed UTF sequences represented as sequences of replacement glyphs,
71 * original codes or '?' as a last resort if replacement glyph is undefined
72 * by Adam Tla/lka <atlka@pg.gda.pl>, Aug 2006
75 #include <linux/module.h>
76 #include <linux/types.h>
77 #include <linux/sched.h>
78 #include <linux/tty.h>
79 #include <linux/tty_flip.h>
80 #include <linux/kernel.h>
81 #include <linux/string.h>
82 #include <linux/errno.h>
84 #include <linux/slab.h>
85 #include <linux/major.h>
87 #include <linux/console.h>
88 #include <linux/init.h>
89 #include <linux/vt_kern.h>
90 #include <linux/selection.h>
91 #include <linux/tiocl.h>
92 #include <linux/kbd_kern.h>
93 #include <linux/consolemap.h>
94 #include <linux/timer.h>
95 #include <linux/interrupt.h>
96 #include <linux/workqueue.h>
97 #include <linux/bootmem.h>
99 #include <linux/font.h>
100 #include <linux/bitops.h>
103 #include <asm/system.h>
104 #include <asm/uaccess.h>
106 #define MAX_NR_CON_DRIVER 16
108 #define CON_DRIVER_FLAG_MODULE 1
109 #define CON_DRIVER_FLAG_INIT 2
112 const struct consw
*con
;
114 struct class_device
*class_dev
;
121 static struct con_driver registered_con_driver
[MAX_NR_CON_DRIVER
];
122 const struct consw
*conswitchp
;
124 /* A bitmap for codes <32. A bit of 1 indicates that the code
125 * corresponding to that bit number invokes some special action
126 * (such as cursor movement) and should not be displayed as a
127 * glyph unless the disp_ctrl mode is explicitly enabled.
129 #define CTRL_ACTION 0x0d00ff81
130 #define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */
133 * Here is the default bell parameters: 750HZ, 1/8th of a second
135 #define DEFAULT_BELL_PITCH 750
136 #define DEFAULT_BELL_DURATION (HZ/8)
138 extern void vcs_make_sysfs(struct tty_struct
*tty
);
139 extern void vcs_remove_sysfs(struct tty_struct
*tty
);
141 extern void console_map_init(void);
142 #ifdef CONFIG_PROM_CONSOLE
143 extern void prom_con_init(void);
145 #ifdef CONFIG_MDA_CONSOLE
146 extern int mda_console_init(void);
149 struct vc vc_cons
[MAX_NR_CONSOLES
];
151 #ifndef VT_SINGLE_DRIVER
152 static const struct consw
*con_driver_map
[MAX_NR_CONSOLES
];
155 static int con_open(struct tty_struct
*, struct file
*);
156 static void vc_init(struct vc_data
*vc
, unsigned int rows
,
157 unsigned int cols
, int do_clear
);
158 static void gotoxy(struct vc_data
*vc
, int new_x
, int new_y
);
159 static void save_cur(struct vc_data
*vc
);
160 static void reset_terminal(struct vc_data
*vc
, int do_clear
);
161 static void con_flush_chars(struct tty_struct
*tty
);
162 static void set_vesa_blanking(char __user
*p
);
163 static void set_cursor(struct vc_data
*vc
);
164 static void hide_cursor(struct vc_data
*vc
);
165 static void console_callback(void *ignored
);
166 static void blank_screen_t(unsigned long dummy
);
167 static void set_palette(struct vc_data
*vc
);
169 static int printable
; /* Is console ready for printing? */
172 * ignore_poke: don't unblank the screen when things are typed. This is
173 * mainly for the privacy of braille terminal users.
175 static int ignore_poke
;
177 int do_poke_blanked_console
;
180 static int vesa_blank_mode
; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
181 static int blankinterval
= 10*60*HZ
;
182 static int vesa_off_interval
;
184 static DECLARE_WORK(console_work
, console_callback
, NULL
);
187 * fg_console is the current virtual console,
188 * last_console is the last used one,
189 * want_console is the console we want to switch to,
190 * kmsg_redirect is the console for kernel messages,
194 int want_console
= -1;
198 * For each existing display, we have a pointer to console currently visible
199 * on that display, allowing consoles other than fg_console to be refreshed
200 * appropriately. Unless the low-level driver supplies its own display_fg
201 * variable, we use this one for the "master display".
203 static struct vc_data
*master_display_fg
;
206 * Unfortunately, we need to delay tty echo when we're currently writing to the
207 * console since the code is (and always was) not re-entrant, so we schedule
208 * all flip requests to process context with schedule-task() and run it from
209 * console_callback().
213 * For the same reason, we defer scrollback to the console callback.
215 static int scrollback_delta
;
218 * Hook so that the power management routines can (un)blank
219 * the console on our behalf.
221 int (*console_blank_hook
)(int);
223 static struct timer_list console_timer
;
224 static int blank_state
;
225 static int blank_timer_expired
;
233 * Low-Level Functions
236 #define IS_FG(vc) ((vc)->vc_num == fg_console)
238 #ifdef VT_BUF_VRAM_ONLY
239 #define DO_UPDATE(vc) 0
241 #define DO_UPDATE(vc) CON_IS_VISIBLE(vc)
244 static inline unsigned short *screenpos(struct vc_data
*vc
, int offset
, int viewed
)
249 p
= (unsigned short *)(vc
->vc_origin
+ offset
);
250 else if (!vc
->vc_sw
->con_screen_pos
)
251 p
= (unsigned short *)(vc
->vc_visible_origin
+ offset
);
253 p
= vc
->vc_sw
->con_screen_pos(vc
, offset
);
257 static inline void scrolldelta(int lines
)
259 scrollback_delta
+= lines
;
260 schedule_console_callback();
263 void schedule_console_callback(void)
265 schedule_work(&console_work
);
268 static void scrup(struct vc_data
*vc
, unsigned int t
, unsigned int b
, int nr
)
270 unsigned short *d
, *s
;
274 if (b
> vc
->vc_rows
|| t
>= b
|| nr
< 1)
276 if (CON_IS_VISIBLE(vc
) && vc
->vc_sw
->con_scroll(vc
, t
, b
, SM_UP
, nr
))
278 d
= (unsigned short *)(vc
->vc_origin
+ vc
->vc_size_row
* t
);
279 s
= (unsigned short *)(vc
->vc_origin
+ vc
->vc_size_row
* (t
+ nr
));
280 scr_memmovew(d
, s
, (b
- t
- nr
) * vc
->vc_size_row
);
281 scr_memsetw(d
+ (b
- t
- nr
) * vc
->vc_cols
, vc
->vc_video_erase_char
,
282 vc
->vc_size_row
* nr
);
285 static void scrdown(struct vc_data
*vc
, unsigned int t
, unsigned int b
, int nr
)
292 if (b
> vc
->vc_rows
|| t
>= b
|| nr
< 1)
294 if (CON_IS_VISIBLE(vc
) && vc
->vc_sw
->con_scroll(vc
, t
, b
, SM_DOWN
, nr
))
296 s
= (unsigned short *)(vc
->vc_origin
+ vc
->vc_size_row
* t
);
297 step
= vc
->vc_cols
* nr
;
298 scr_memmovew(s
+ step
, s
, (b
- t
- nr
) * vc
->vc_size_row
);
299 scr_memsetw(s
, vc
->vc_video_erase_char
, 2 * step
);
302 static void do_update_region(struct vc_data
*vc
, unsigned long start
, int count
)
304 #ifndef VT_BUF_VRAM_ONLY
305 unsigned int xx
, yy
, offset
;
309 if (!vc
->vc_sw
->con_getxy
) {
310 offset
= (start
- vc
->vc_origin
) / 2;
311 xx
= offset
% vc
->vc_cols
;
312 yy
= offset
/ vc
->vc_cols
;
315 start
= vc
->vc_sw
->con_getxy(vc
, start
, &nxx
, &nyy
);
319 u16 attrib
= scr_readw(p
) & 0xff00;
322 while (xx
< vc
->vc_cols
&& count
) {
323 if (attrib
!= (scr_readw(p
) & 0xff00)) {
325 vc
->vc_sw
->con_putcs(vc
, q
, p
-q
, yy
, startx
);
328 attrib
= scr_readw(p
) & 0xff00;
335 vc
->vc_sw
->con_putcs(vc
, q
, p
-q
, yy
, startx
);
340 if (vc
->vc_sw
->con_getxy
) {
342 start
= vc
->vc_sw
->con_getxy(vc
, start
, NULL
, NULL
);
348 void update_region(struct vc_data
*vc
, unsigned long start
, int count
)
350 WARN_CONSOLE_UNLOCKED();
354 do_update_region(vc
, start
, count
);
359 /* Structure of attributes is hardware-dependent */
361 static u8
build_attr(struct vc_data
*vc
, u8 _color
, u8 _intensity
, u8 _blink
, u8 _underline
, u8 _reverse
)
363 if (vc
->vc_sw
->con_build_attr
)
364 return vc
->vc_sw
->con_build_attr(vc
, _color
, _intensity
, _blink
, _underline
, _reverse
);
366 #ifndef VT_BUF_VRAM_ONLY
368 * ++roman: I completely changed the attribute format for monochrome
369 * mode (!can_do_color). The formerly used MDA (monochrome display
370 * adapter) format didn't allow the combination of certain effects.
371 * Now the attribute is just a bit vector:
372 * Bit 0..1: intensity (0..2)
379 if (!vc
->vc_can_do_color
)
381 (_underline
? 4 : 0) |
385 a
= (a
& 0xf0) | vc
->vc_ulcolor
;
386 else if (_intensity
== 0)
387 a
= (a
& 0xf0) | vc
->vc_ulcolor
;
389 a
= ((a
) & 0x88) | ((((a
) >> 4) | ((a
) << 4)) & 0x77);
394 if (vc
->vc_hi_font_mask
== 0x100)
403 static void update_attr(struct vc_data
*vc
)
405 vc
->vc_attr
= build_attr(vc
, vc
->vc_color
, vc
->vc_intensity
, vc
->vc_blink
, vc
->vc_underline
, vc
->vc_reverse
^ vc
->vc_decscnm
);
406 vc
->vc_video_erase_char
= (build_attr(vc
, vc
->vc_color
, 1, vc
->vc_blink
, 0, vc
->vc_decscnm
) << 8) | ' ';
409 /* Note: inverting the screen twice should revert to the original state */
410 void invert_screen(struct vc_data
*vc
, int offset
, int count
, int viewed
)
414 WARN_CONSOLE_UNLOCKED();
417 p
= screenpos(vc
, offset
, viewed
);
418 if (vc
->vc_sw
->con_invert_region
)
419 vc
->vc_sw
->con_invert_region(vc
, p
, count
);
420 #ifndef VT_BUF_VRAM_ONLY
426 if (!vc
->vc_can_do_color
) {
433 } else if (vc
->vc_hi_font_mask
== 0x100) {
436 a
= ((a
) & 0x11ff) | (((a
) & 0xe000) >> 4) | (((a
) & 0x0e00) << 4);
443 a
= ((a
) & 0x88ff) | (((a
) & 0x7000) >> 4) | (((a
) & 0x0700) << 4);
451 do_update_region(vc
, (unsigned long) p
, count
);
454 /* used by selection: complement pointer position */
455 void complement_pos(struct vc_data
*vc
, int offset
)
457 static int old_offset
= -1;
458 static unsigned short old
;
459 static unsigned short oldx
, oldy
;
461 WARN_CONSOLE_UNLOCKED();
463 if (old_offset
!= -1 && old_offset
>= 0 &&
464 old_offset
< vc
->vc_screenbuf_size
) {
465 scr_writew(old
, screenpos(vc
, old_offset
, 1));
467 vc
->vc_sw
->con_putc(vc
, old
, oldy
, oldx
);
472 if (offset
!= -1 && offset
>= 0 &&
473 offset
< vc
->vc_screenbuf_size
) {
476 p
= screenpos(vc
, offset
, 1);
478 new = old
^ vc
->vc_complement_mask
;
481 oldx
= (offset
>> 1) % vc
->vc_cols
;
482 oldy
= (offset
>> 1) / vc
->vc_cols
;
483 vc
->vc_sw
->con_putc(vc
, new, oldy
, oldx
);
489 static void insert_char(struct vc_data
*vc
, unsigned int nr
)
491 unsigned short *p
, *q
= (unsigned short *)vc
->vc_pos
;
493 p
= q
+ vc
->vc_cols
- nr
- vc
->vc_x
;
495 scr_writew(scr_readw(p
), p
+ nr
);
496 scr_memsetw(q
, vc
->vc_video_erase_char
, nr
* 2);
497 vc
->vc_need_wrap
= 0;
499 unsigned short oldattr
= vc
->vc_attr
;
500 vc
->vc_sw
->con_bmove(vc
, vc
->vc_y
, vc
->vc_x
, vc
->vc_y
, vc
->vc_x
+ nr
, 1,
501 vc
->vc_cols
- vc
->vc_x
- nr
);
502 vc
->vc_attr
= vc
->vc_video_erase_char
>> 8;
504 vc
->vc_sw
->con_putc(vc
, vc
->vc_video_erase_char
, vc
->vc_y
, vc
->vc_x
+ nr
);
505 vc
->vc_attr
= oldattr
;
509 static void delete_char(struct vc_data
*vc
, unsigned int nr
)
511 unsigned int i
= vc
->vc_x
;
512 unsigned short *p
= (unsigned short *)vc
->vc_pos
;
514 while (++i
<= vc
->vc_cols
- nr
) {
515 scr_writew(scr_readw(p
+nr
), p
);
518 scr_memsetw(p
, vc
->vc_video_erase_char
, nr
* 2);
519 vc
->vc_need_wrap
= 0;
521 unsigned short oldattr
= vc
->vc_attr
;
522 vc
->vc_sw
->con_bmove(vc
, vc
->vc_y
, vc
->vc_x
+ nr
, vc
->vc_y
, vc
->vc_x
, 1,
523 vc
->vc_cols
- vc
->vc_x
- nr
);
524 vc
->vc_attr
= vc
->vc_video_erase_char
>> 8;
526 vc
->vc_sw
->con_putc(vc
, vc
->vc_video_erase_char
, vc
->vc_y
,
527 vc
->vc_cols
- 1 - nr
);
528 vc
->vc_attr
= oldattr
;
532 static int softcursor_original
;
534 static void add_softcursor(struct vc_data
*vc
)
536 int i
= scr_readw((u16
*) vc
->vc_pos
);
537 u32 type
= vc
->vc_cursor_type
;
539 if (! (type
& 0x10)) return;
540 if (softcursor_original
!= -1) return;
541 softcursor_original
= i
;
542 i
|= ((type
>> 8) & 0xff00 );
543 i
^= ((type
) & 0xff00 );
544 if ((type
& 0x20) && ((softcursor_original
& 0x7000) == (i
& 0x7000))) i
^= 0x7000;
545 if ((type
& 0x40) && ((i
& 0x700) == ((i
& 0x7000) >> 4))) i
^= 0x0700;
546 scr_writew(i
, (u16
*) vc
->vc_pos
);
548 vc
->vc_sw
->con_putc(vc
, i
, vc
->vc_y
, vc
->vc_x
);
551 static void hide_softcursor(struct vc_data
*vc
)
553 if (softcursor_original
!= -1) {
554 scr_writew(softcursor_original
, (u16
*)vc
->vc_pos
);
556 vc
->vc_sw
->con_putc(vc
, softcursor_original
,
558 softcursor_original
= -1;
562 static void hide_cursor(struct vc_data
*vc
)
566 vc
->vc_sw
->con_cursor(vc
, CM_ERASE
);
570 static void set_cursor(struct vc_data
*vc
)
572 if (!IS_FG(vc
) || console_blanked
||
573 vc
->vc_mode
== KD_GRAPHICS
)
579 if ((vc
->vc_cursor_type
& 0x0f) != 1)
580 vc
->vc_sw
->con_cursor(vc
, CM_DRAW
);
585 static void set_origin(struct vc_data
*vc
)
587 WARN_CONSOLE_UNLOCKED();
589 if (!CON_IS_VISIBLE(vc
) ||
590 !vc
->vc_sw
->con_set_origin
||
591 !vc
->vc_sw
->con_set_origin(vc
))
592 vc
->vc_origin
= (unsigned long)vc
->vc_screenbuf
;
593 vc
->vc_visible_origin
= vc
->vc_origin
;
594 vc
->vc_scr_end
= vc
->vc_origin
+ vc
->vc_screenbuf_size
;
595 vc
->vc_pos
= vc
->vc_origin
+ vc
->vc_size_row
* vc
->vc_y
+ 2 * vc
->vc_x
;
598 static inline void save_screen(struct vc_data
*vc
)
600 WARN_CONSOLE_UNLOCKED();
602 if (vc
->vc_sw
->con_save_screen
)
603 vc
->vc_sw
->con_save_screen(vc
);
607 * Redrawing of screen
610 static void clear_buffer_attributes(struct vc_data
*vc
)
612 unsigned short *p
= (unsigned short *)vc
->vc_origin
;
613 int count
= vc
->vc_screenbuf_size
/ 2;
614 int mask
= vc
->vc_hi_font_mask
| 0xff;
616 for (; count
> 0; count
--, p
++) {
617 scr_writew((scr_readw(p
)&mask
) | (vc
->vc_video_erase_char
& ~mask
), p
);
621 void redraw_screen(struct vc_data
*vc
, int is_switch
)
625 WARN_CONSOLE_UNLOCKED();
629 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
634 struct vc_data
*old_vc
= vc_cons
[fg_console
].d
;
637 if (!CON_IS_VISIBLE(vc
))
639 *vc
->vc_display_fg
= vc
;
640 fg_console
= vc
->vc_num
;
642 if (!CON_IS_VISIBLE(old_vc
)) {
653 int old_was_color
= vc
->vc_can_do_color
;
656 update
= vc
->vc_sw
->con_switch(vc
);
659 * If console changed from mono<->color, the best we can do
660 * is to clear the buffer attributes. As it currently stands,
661 * rebuilding new attributes from the old buffer is not doable
662 * without overly complex code.
664 if (old_was_color
!= vc
->vc_can_do_color
) {
666 clear_buffer_attributes(vc
);
668 if (update
&& vc
->vc_mode
!= KD_GRAPHICS
)
669 do_update_region(vc
, vc
->vc_origin
, vc
->vc_screenbuf_size
/ 2);
674 compute_shiftstate();
679 * Allocation, freeing and resizing of VTs.
682 int vc_cons_allocated(unsigned int i
)
684 return (i
< MAX_NR_CONSOLES
&& vc_cons
[i
].d
);
687 static void visual_init(struct vc_data
*vc
, int num
, int init
)
689 /* ++Geert: vc->vc_sw->con_init determines console size */
691 module_put(vc
->vc_sw
->owner
);
692 vc
->vc_sw
= conswitchp
;
693 #ifndef VT_SINGLE_DRIVER
694 if (con_driver_map
[num
])
695 vc
->vc_sw
= con_driver_map
[num
];
697 __module_get(vc
->vc_sw
->owner
);
699 vc
->vc_display_fg
= &master_display_fg
;
700 vc
->vc_uni_pagedir_loc
= &vc
->vc_uni_pagedir
;
701 vc
->vc_uni_pagedir
= 0;
702 vc
->vc_hi_font_mask
= 0;
703 vc
->vc_complement_mask
= 0;
704 vc
->vc_can_do_color
= 0;
705 vc
->vc_sw
->con_init(vc
, init
);
706 if (!vc
->vc_complement_mask
)
707 vc
->vc_complement_mask
= vc
->vc_can_do_color
? 0x7700 : 0x0800;
708 vc
->vc_s_complement_mask
= vc
->vc_complement_mask
;
709 vc
->vc_size_row
= vc
->vc_cols
<< 1;
710 vc
->vc_screenbuf_size
= vc
->vc_rows
* vc
->vc_size_row
;
713 int vc_allocate(unsigned int currcons
) /* return 0 on success */
715 WARN_CONSOLE_UNLOCKED();
717 if (currcons
>= MAX_NR_CONSOLES
)
719 if (!vc_cons
[currcons
].d
) {
722 /* prevent users from taking too much memory */
723 if (currcons
>= MAX_NR_USER_CONSOLES
&& !capable(CAP_SYS_RESOURCE
))
726 /* due to the granularity of kmalloc, we waste some memory here */
727 /* the alloc is done in two steps, to optimize the common situation
728 of a 25x80 console (structsize=216, screenbuf_size=4000) */
729 /* although the numbers above are not valid since long ago, the
730 point is still up-to-date and the comment still has its value
731 even if only as a historical artifact. --mj, July 1998 */
732 vc
= kmalloc(sizeof(struct vc_data
), GFP_KERNEL
);
735 memset(vc
, 0, sizeof(*vc
));
736 vc_cons
[currcons
].d
= vc
;
737 visual_init(vc
, currcons
, 1);
738 if (!*vc
->vc_uni_pagedir_loc
)
739 con_set_default_unimap(vc
);
740 vc
->vc_screenbuf
= kmalloc(vc
->vc_screenbuf_size
, GFP_KERNEL
);
741 if (!vc
->vc_screenbuf
) {
743 vc_cons
[currcons
].d
= NULL
;
746 vc
->vc_kmalloced
= 1;
747 vc_init(vc
, vc
->vc_rows
, vc
->vc_cols
, 1);
752 static inline int resize_screen(struct vc_data
*vc
, int width
, int height
)
754 /* Resizes the resolution of the display adapater */
757 if (vc
->vc_mode
!= KD_GRAPHICS
&& vc
->vc_sw
->con_resize
)
758 err
= vc
->vc_sw
->con_resize(vc
, width
, height
);
763 * Change # of rows and columns (0 means unchanged/the size of fg_console)
764 * [this is to be used together with some user program
765 * like resize that changes the hardware videomode]
767 #define VC_RESIZE_MAXCOL (32767)
768 #define VC_RESIZE_MAXROW (32767)
769 int vc_resize(struct vc_data
*vc
, unsigned int cols
, unsigned int lines
)
771 unsigned long old_origin
, new_origin
, new_scr_end
, rlth
, rrem
, err
= 0;
772 unsigned int old_cols
, old_rows
, old_row_size
, old_screen_size
;
773 unsigned int new_cols
, new_rows
, new_row_size
, new_screen_size
;
775 unsigned short *newscreen
;
777 WARN_CONSOLE_UNLOCKED();
782 if (cols
> VC_RESIZE_MAXCOL
|| lines
> VC_RESIZE_MAXROW
)
785 new_cols
= (cols
? cols
: vc
->vc_cols
);
786 new_rows
= (lines
? lines
: vc
->vc_rows
);
787 new_row_size
= new_cols
<< 1;
788 new_screen_size
= new_row_size
* new_rows
;
790 if (new_cols
== vc
->vc_cols
&& new_rows
== vc
->vc_rows
)
793 newscreen
= (unsigned short *) kmalloc(new_screen_size
, GFP_USER
);
797 old_rows
= vc
->vc_rows
;
798 old_cols
= vc
->vc_cols
;
799 old_row_size
= vc
->vc_size_row
;
800 old_screen_size
= vc
->vc_screenbuf_size
;
802 err
= resize_screen(vc
, new_cols
, new_rows
);
808 vc
->vc_rows
= new_rows
;
809 vc
->vc_cols
= new_cols
;
810 vc
->vc_size_row
= new_row_size
;
811 vc
->vc_screenbuf_size
= new_screen_size
;
813 rlth
= min(old_row_size
, new_row_size
);
814 rrem
= new_row_size
- rlth
;
815 old_origin
= vc
->vc_origin
;
816 new_origin
= (long) newscreen
;
817 new_scr_end
= new_origin
+ new_screen_size
;
819 if (vc
->vc_y
> new_rows
) {
820 if (old_rows
- vc
->vc_y
< new_rows
) {
822 * Cursor near the bottom, copy contents from the
825 old_origin
+= (old_rows
- new_rows
) * old_row_size
;
826 end
= vc
->vc_scr_end
;
829 * Cursor is in no man's land, copy 1/2 screenful
830 * from the top and bottom of cursor position
832 old_origin
+= (vc
->vc_y
- new_rows
/2) * old_row_size
;
833 end
= old_origin
+ (old_row_size
* new_rows
);
837 * Cursor near the top, copy contents from the top of buffer
839 end
= (old_rows
> new_rows
) ? old_origin
+
840 (old_row_size
* new_rows
) :
845 while (old_origin
< end
) {
846 scr_memcpyw((unsigned short *) new_origin
,
847 (unsigned short *) old_origin
, rlth
);
849 scr_memsetw((void *)(new_origin
+ rlth
),
850 vc
->vc_video_erase_char
, rrem
);
851 old_origin
+= old_row_size
;
852 new_origin
+= new_row_size
;
854 if (new_scr_end
> new_origin
)
855 scr_memsetw((void *)new_origin
, vc
->vc_video_erase_char
,
856 new_scr_end
- new_origin
);
857 if (vc
->vc_kmalloced
)
858 kfree(vc
->vc_screenbuf
);
859 vc
->vc_screenbuf
= newscreen
;
860 vc
->vc_kmalloced
= 1;
861 vc
->vc_screenbuf_size
= new_screen_size
;
864 /* do part of a reset_terminal() */
866 vc
->vc_bottom
= vc
->vc_rows
;
867 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
);
871 struct winsize ws
, *cws
= &vc
->vc_tty
->winsize
;
873 memset(&ws
, 0, sizeof(ws
));
874 ws
.ws_row
= vc
->vc_rows
;
875 ws
.ws_col
= vc
->vc_cols
;
876 ws
.ws_ypixel
= vc
->vc_scan_lines
;
877 if ((ws
.ws_row
!= cws
->ws_row
|| ws
.ws_col
!= cws
->ws_col
) &&
878 vc
->vc_tty
->pgrp
> 0)
879 kill_pg(vc
->vc_tty
->pgrp
, SIGWINCH
, 1);
883 if (CON_IS_VISIBLE(vc
))
889 void vc_disallocate(unsigned int currcons
)
891 WARN_CONSOLE_UNLOCKED();
893 if (vc_cons_allocated(currcons
)) {
894 struct vc_data
*vc
= vc_cons
[currcons
].d
;
895 vc
->vc_sw
->con_deinit(vc
);
896 module_put(vc
->vc_sw
->owner
);
897 if (vc
->vc_kmalloced
)
898 kfree(vc
->vc_screenbuf
);
899 if (currcons
>= MIN_NR_CONSOLES
)
901 vc_cons
[currcons
].d
= NULL
;
909 #define set_kbd(vc, x) set_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
910 #define clr_kbd(vc, x) clr_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
911 #define is_kbd(vc, x) vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
913 #define decarm VC_REPEAT
914 #define decckm VC_CKMODE
915 #define kbdapplic VC_APPLIC
919 * this is what the terminal answers to a ESC-Z or csi0c query.
921 #define VT100ID "\033[?1;2c"
922 #define VT102ID "\033[?6c"
924 unsigned char color_table
[] = { 0, 4, 2, 6, 1, 5, 3, 7,
925 8,12,10,14, 9,13,11,15 };
927 /* the default colour table, for VGA+ colour systems */
928 int default_red
[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
929 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
930 int default_grn
[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
931 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
932 int default_blu
[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
933 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
936 * gotoxy() must verify all boundaries, because the arguments
937 * might also be negative. If the given position is out of
938 * bounds, the cursor is placed at the nearest margin.
940 static void gotoxy(struct vc_data
*vc
, int new_x
, int new_y
)
947 if (new_x
>= vc
->vc_cols
)
948 vc
->vc_x
= vc
->vc_cols
- 1;
955 max_y
= vc
->vc_bottom
;
962 else if (new_y
>= max_y
)
963 vc
->vc_y
= max_y
- 1;
966 vc
->vc_pos
= vc
->vc_origin
+ vc
->vc_y
* vc
->vc_size_row
+ (vc
->vc_x
<<1);
967 vc
->vc_need_wrap
= 0;
970 /* for absolute user moves, when decom is set */
971 static void gotoxay(struct vc_data
*vc
, int new_x
, int new_y
)
973 gotoxy(vc
, new_x
, vc
->vc_decom
? (vc
->vc_top
+ new_y
) : new_y
);
976 void scrollback(struct vc_data
*vc
, int lines
)
979 lines
= vc
->vc_rows
/ 2;
983 void scrollfront(struct vc_data
*vc
, int lines
)
986 lines
= vc
->vc_rows
/ 2;
990 static void lf(struct vc_data
*vc
)
992 /* don't scroll if above bottom of scrolling region, or
993 * if below scrolling region
995 if (vc
->vc_y
+ 1 == vc
->vc_bottom
)
996 scrup(vc
, vc
->vc_top
, vc
->vc_bottom
, 1);
997 else if (vc
->vc_y
< vc
->vc_rows
- 1) {
999 vc
->vc_pos
+= vc
->vc_size_row
;
1001 vc
->vc_need_wrap
= 0;
1004 static void ri(struct vc_data
*vc
)
1006 /* don't scroll if below top of scrolling region, or
1007 * if above scrolling region
1009 if (vc
->vc_y
== vc
->vc_top
)
1010 scrdown(vc
, vc
->vc_top
, vc
->vc_bottom
, 1);
1011 else if (vc
->vc_y
> 0) {
1013 vc
->vc_pos
-= vc
->vc_size_row
;
1015 vc
->vc_need_wrap
= 0;
1018 static inline void cr(struct vc_data
*vc
)
1020 vc
->vc_pos
-= vc
->vc_x
<< 1;
1021 vc
->vc_need_wrap
= vc
->vc_x
= 0;
1024 static inline void bs(struct vc_data
*vc
)
1029 vc
->vc_need_wrap
= 0;
1033 static inline void del(struct vc_data
*vc
)
1038 static void csi_J(struct vc_data
*vc
, int vpar
)
1041 unsigned short * start
;
1044 case 0: /* erase from cursor to end of display */
1045 count
= (vc
->vc_scr_end
- vc
->vc_pos
) >> 1;
1046 start
= (unsigned short *)vc
->vc_pos
;
1047 if (DO_UPDATE(vc
)) {
1048 /* do in two stages */
1049 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, vc
->vc_x
, 1,
1050 vc
->vc_cols
- vc
->vc_x
);
1051 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
+ 1, 0,
1052 vc
->vc_rows
- vc
->vc_y
- 1,
1056 case 1: /* erase from start to cursor */
1057 count
= ((vc
->vc_pos
- vc
->vc_origin
) >> 1) + 1;
1058 start
= (unsigned short *)vc
->vc_origin
;
1059 if (DO_UPDATE(vc
)) {
1060 /* do in two stages */
1061 vc
->vc_sw
->con_clear(vc
, 0, 0, vc
->vc_y
,
1063 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, 0, 1,
1067 case 2: /* erase whole display */
1068 count
= vc
->vc_cols
* vc
->vc_rows
;
1069 start
= (unsigned short *)vc
->vc_origin
;
1071 vc
->vc_sw
->con_clear(vc
, 0, 0,
1078 scr_memsetw(start
, vc
->vc_video_erase_char
, 2 * count
);
1079 vc
->vc_need_wrap
= 0;
1082 static void csi_K(struct vc_data
*vc
, int vpar
)
1085 unsigned short * start
;
1088 case 0: /* erase from cursor to end of line */
1089 count
= vc
->vc_cols
- vc
->vc_x
;
1090 start
= (unsigned short *)vc
->vc_pos
;
1092 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, vc
->vc_x
, 1,
1093 vc
->vc_cols
- vc
->vc_x
);
1095 case 1: /* erase from start of line to cursor */
1096 start
= (unsigned short *)(vc
->vc_pos
- (vc
->vc_x
<< 1));
1097 count
= vc
->vc_x
+ 1;
1099 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, 0, 1,
1102 case 2: /* erase whole line */
1103 start
= (unsigned short *)(vc
->vc_pos
- (vc
->vc_x
<< 1));
1104 count
= vc
->vc_cols
;
1106 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, 0, 1,
1112 scr_memsetw(start
, vc
->vc_video_erase_char
, 2 * count
);
1113 vc
->vc_need_wrap
= 0;
1116 static void csi_X(struct vc_data
*vc
, int vpar
) /* erase the following vpar positions */
1122 count
= (vpar
> vc
->vc_cols
- vc
->vc_x
) ? (vc
->vc_cols
- vc
->vc_x
) : vpar
;
1124 scr_memsetw((unsigned short *)vc
->vc_pos
, vc
->vc_video_erase_char
, 2 * count
);
1126 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, vc
->vc_x
, 1, count
);
1127 vc
->vc_need_wrap
= 0;
1130 static void default_attr(struct vc_data
*vc
)
1132 vc
->vc_intensity
= 1;
1133 vc
->vc_underline
= 0;
1136 vc
->vc_color
= vc
->vc_def_color
;
1139 /* console_sem is held */
1140 static void csi_m(struct vc_data
*vc
)
1144 for (i
= 0; i
<= vc
->vc_npar
; i
++)
1145 switch (vc
->vc_par
[i
]) {
1146 case 0: /* all attributes off */
1150 vc
->vc_intensity
= 2;
1153 vc
->vc_intensity
= 0;
1156 vc
->vc_underline
= 1;
1164 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1165 * Select primary font, don't display
1166 * control chars if defined, don't set
1169 vc
->vc_translate
= set_translate(vc
->vc_charset
== 0
1171 : vc
->vc_G1_charset
, vc
);
1172 vc
->vc_disp_ctrl
= 0;
1173 vc
->vc_toggle_meta
= 0;
1175 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1176 * Select first alternate font, lets
1177 * chars < 32 be displayed as ROM chars.
1179 vc
->vc_translate
= set_translate(IBMPC_MAP
, vc
);
1180 vc
->vc_disp_ctrl
= 1;
1181 vc
->vc_toggle_meta
= 0;
1183 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1184 * Select second alternate font, toggle
1185 * high bit before displaying as ROM char.
1187 vc
->vc_translate
= set_translate(IBMPC_MAP
, vc
);
1188 vc
->vc_disp_ctrl
= 1;
1189 vc
->vc_toggle_meta
= 1;
1193 vc
->vc_intensity
= 1;
1196 vc
->vc_underline
= 0;
1204 case 38: /* ANSI X3.64-1979 (SCO-ish?)
1205 * Enables underscore, white foreground
1206 * with white underscore (Linux - use
1207 * default foreground).
1209 vc
->vc_color
= (vc
->vc_def_color
& 0x0f) | (vc
->vc_color
& 0xf0);
1210 vc
->vc_underline
= 1;
1212 case 39: /* ANSI X3.64-1979 (SCO-ish?)
1213 * Disable underline option.
1214 * Reset colour to default? It did this
1217 vc
->vc_color
= (vc
->vc_def_color
& 0x0f) | (vc
->vc_color
& 0xf0);
1218 vc
->vc_underline
= 0;
1221 vc
->vc_color
= (vc
->vc_def_color
& 0xf0) | (vc
->vc_color
& 0x0f);
1224 if (vc
->vc_par
[i
] >= 30 && vc
->vc_par
[i
] <= 37)
1225 vc
->vc_color
= color_table
[vc
->vc_par
[i
] - 30]
1226 | (vc
->vc_color
& 0xf0);
1227 else if (vc
->vc_par
[i
] >= 40 && vc
->vc_par
[i
] <= 47)
1228 vc
->vc_color
= (color_table
[vc
->vc_par
[i
] - 40] << 4)
1229 | (vc
->vc_color
& 0x0f);
1235 static void respond_string(const char *p
, struct tty_struct
*tty
)
1238 tty_insert_flip_char(tty
, *p
, 0);
1241 con_schedule_flip(tty
);
1244 static void cursor_report(struct vc_data
*vc
, struct tty_struct
*tty
)
1248 sprintf(buf
, "\033[%d;%dR", vc
->vc_y
+ (vc
->vc_decom
? vc
->vc_top
+ 1 : 1), vc
->vc_x
+ 1);
1249 respond_string(buf
, tty
);
1252 static inline void status_report(struct tty_struct
*tty
)
1254 respond_string("\033[0n", tty
); /* Terminal ok */
1257 static inline void respond_ID(struct tty_struct
* tty
)
1259 respond_string(VT102ID
, tty
);
1262 void mouse_report(struct tty_struct
*tty
, int butt
, int mrx
, int mry
)
1266 sprintf(buf
, "\033[M%c%c%c", (char)(' ' + butt
), (char)('!' + mrx
),
1268 respond_string(buf
, tty
);
1271 /* invoked via ioctl(TIOCLINUX) and through set_selection */
1272 int mouse_reporting(void)
1274 return vc_cons
[fg_console
].d
->vc_report_mouse
;
1277 /* console_sem is held */
1278 static void set_mode(struct vc_data
*vc
, int on_off
)
1282 for (i
= 0; i
<= vc
->vc_npar
; i
++)
1284 switch(vc
->vc_par
[i
]) { /* DEC private modes set/reset */
1285 case 1: /* Cursor keys send ^[Ox/^[[x */
1287 set_kbd(vc
, decckm
);
1289 clr_kbd(vc
, decckm
);
1291 case 3: /* 80/132 mode switch unimplemented */
1292 vc
->vc_deccolm
= on_off
;
1294 vc_resize(deccolm
? 132 : 80, vc
->vc_rows
);
1295 /* this alone does not suffice; some user mode
1296 utility has to change the hardware regs */
1299 case 5: /* Inverted screen on/off */
1300 if (vc
->vc_decscnm
!= on_off
) {
1301 vc
->vc_decscnm
= on_off
;
1302 invert_screen(vc
, 0, vc
->vc_screenbuf_size
, 0);
1306 case 6: /* Origin relative/absolute */
1307 vc
->vc_decom
= on_off
;
1310 case 7: /* Autowrap on/off */
1311 vc
->vc_decawm
= on_off
;
1313 case 8: /* Autorepeat on/off */
1315 set_kbd(vc
, decarm
);
1317 clr_kbd(vc
, decarm
);
1320 vc
->vc_report_mouse
= on_off
? 1 : 0;
1322 case 25: /* Cursor on/off */
1323 vc
->vc_deccm
= on_off
;
1326 vc
->vc_report_mouse
= on_off
? 2 : 0;
1330 switch(vc
->vc_par
[i
]) { /* ANSI modes set/reset */
1331 case 3: /* Monitor (display ctrls) */
1332 vc
->vc_disp_ctrl
= on_off
;
1334 case 4: /* Insert Mode on/off */
1335 vc
->vc_decim
= on_off
;
1337 case 20: /* Lf, Enter == CrLf/Lf */
1347 /* console_sem is held */
1348 static void setterm_command(struct vc_data
*vc
)
1350 switch(vc
->vc_par
[0]) {
1351 case 1: /* set color for underline mode */
1352 if (vc
->vc_can_do_color
&&
1353 vc
->vc_par
[1] < 16) {
1354 vc
->vc_ulcolor
= color_table
[vc
->vc_par
[1]];
1355 if (vc
->vc_underline
)
1359 case 2: /* set color for half intensity mode */
1360 if (vc
->vc_can_do_color
&&
1361 vc
->vc_par
[1] < 16) {
1362 vc
->vc_halfcolor
= color_table
[vc
->vc_par
[1]];
1363 if (vc
->vc_intensity
== 0)
1367 case 8: /* store colors as defaults */
1368 vc
->vc_def_color
= vc
->vc_attr
;
1369 if (vc
->vc_hi_font_mask
== 0x100)
1370 vc
->vc_def_color
>>= 1;
1374 case 9: /* set blanking interval */
1375 blankinterval
= ((vc
->vc_par
[1] < 60) ? vc
->vc_par
[1] : 60) * 60 * HZ
;
1376 poke_blanked_console();
1378 case 10: /* set bell frequency in Hz */
1379 if (vc
->vc_npar
>= 1)
1380 vc
->vc_bell_pitch
= vc
->vc_par
[1];
1382 vc
->vc_bell_pitch
= DEFAULT_BELL_PITCH
;
1384 case 11: /* set bell duration in msec */
1385 if (vc
->vc_npar
>= 1)
1386 vc
->vc_bell_duration
= (vc
->vc_par
[1] < 2000) ?
1387 vc
->vc_par
[1] * HZ
/ 1000 : 0;
1389 vc
->vc_bell_duration
= DEFAULT_BELL_DURATION
;
1391 case 12: /* bring specified console to the front */
1392 if (vc
->vc_par
[1] >= 1 && vc_cons_allocated(vc
->vc_par
[1] - 1))
1393 set_console(vc
->vc_par
[1] - 1);
1395 case 13: /* unblank the screen */
1396 poke_blanked_console();
1398 case 14: /* set vesa powerdown interval */
1399 vesa_off_interval
= ((vc
->vc_par
[1] < 60) ? vc
->vc_par
[1] : 60) * 60 * HZ
;
1401 case 15: /* activate the previous console */
1402 set_console(last_console
);
1407 /* console_sem is held */
1408 static void csi_at(struct vc_data
*vc
, unsigned int nr
)
1410 if (nr
> vc
->vc_cols
- vc
->vc_x
)
1411 nr
= vc
->vc_cols
- vc
->vc_x
;
1414 insert_char(vc
, nr
);
1417 /* console_sem is held */
1418 static void csi_L(struct vc_data
*vc
, unsigned int nr
)
1420 if (nr
> vc
->vc_rows
- vc
->vc_y
)
1421 nr
= vc
->vc_rows
- vc
->vc_y
;
1424 scrdown(vc
, vc
->vc_y
, vc
->vc_bottom
, nr
);
1425 vc
->vc_need_wrap
= 0;
1428 /* console_sem is held */
1429 static void csi_P(struct vc_data
*vc
, unsigned int nr
)
1431 if (nr
> vc
->vc_cols
- vc
->vc_x
)
1432 nr
= vc
->vc_cols
- vc
->vc_x
;
1435 delete_char(vc
, nr
);
1438 /* console_sem is held */
1439 static void csi_M(struct vc_data
*vc
, unsigned int nr
)
1441 if (nr
> vc
->vc_rows
- vc
->vc_y
)
1442 nr
= vc
->vc_rows
- vc
->vc_y
;
1445 scrup(vc
, vc
->vc_y
, vc
->vc_bottom
, nr
);
1446 vc
->vc_need_wrap
= 0;
1449 /* console_sem is held (except via vc_init->reset_terminal */
1450 static void save_cur(struct vc_data
*vc
)
1452 vc
->vc_saved_x
= vc
->vc_x
;
1453 vc
->vc_saved_y
= vc
->vc_y
;
1454 vc
->vc_s_intensity
= vc
->vc_intensity
;
1455 vc
->vc_s_underline
= vc
->vc_underline
;
1456 vc
->vc_s_blink
= vc
->vc_blink
;
1457 vc
->vc_s_reverse
= vc
->vc_reverse
;
1458 vc
->vc_s_charset
= vc
->vc_charset
;
1459 vc
->vc_s_color
= vc
->vc_color
;
1460 vc
->vc_saved_G0
= vc
->vc_G0_charset
;
1461 vc
->vc_saved_G1
= vc
->vc_G1_charset
;
1464 /* console_sem is held */
1465 static void restore_cur(struct vc_data
*vc
)
1467 gotoxy(vc
, vc
->vc_saved_x
, vc
->vc_saved_y
);
1468 vc
->vc_intensity
= vc
->vc_s_intensity
;
1469 vc
->vc_underline
= vc
->vc_s_underline
;
1470 vc
->vc_blink
= vc
->vc_s_blink
;
1471 vc
->vc_reverse
= vc
->vc_s_reverse
;
1472 vc
->vc_charset
= vc
->vc_s_charset
;
1473 vc
->vc_color
= vc
->vc_s_color
;
1474 vc
->vc_G0_charset
= vc
->vc_saved_G0
;
1475 vc
->vc_G1_charset
= vc
->vc_saved_G1
;
1476 vc
->vc_translate
= set_translate(vc
->vc_charset
? vc
->vc_G1_charset
: vc
->vc_G0_charset
, vc
);
1478 vc
->vc_need_wrap
= 0;
1481 enum { ESnormal
, ESesc
, ESsquare
, ESgetpars
, ESgotpars
, ESfunckey
,
1482 EShash
, ESsetG0
, ESsetG1
, ESpercent
, ESignore
, ESnonstd
,
1485 /* console_sem is held (except via vc_init()) */
1486 static void reset_terminal(struct vc_data
*vc
, int do_clear
)
1489 vc
->vc_bottom
= vc
->vc_rows
;
1490 vc
->vc_state
= ESnormal
;
1492 vc
->vc_translate
= set_translate(LAT1_MAP
, vc
);
1493 vc
->vc_G0_charset
= LAT1_MAP
;
1494 vc
->vc_G1_charset
= GRAF_MAP
;
1496 vc
->vc_need_wrap
= 0;
1497 vc
->vc_report_mouse
= 0;
1499 vc
->vc_utf_count
= 0;
1501 vc
->vc_disp_ctrl
= 0;
1502 vc
->vc_toggle_meta
= 0;
1510 set_kbd(vc
, decarm
);
1511 clr_kbd(vc
, decckm
);
1512 clr_kbd(vc
, kbdapplic
);
1514 kbd_table
[vc
->vc_num
].lockstate
= 0;
1515 kbd_table
[vc
->vc_num
].slockstate
= 0;
1516 kbd_table
[vc
->vc_num
].ledmode
= LED_SHOW_FLAGS
;
1517 kbd_table
[vc
->vc_num
].ledflagstate
= kbd_table
[vc
->vc_num
].default_ledflagstate
;
1518 /* do not do set_leds here because this causes an endless tasklet loop
1519 when the keyboard hasn't been initialized yet */
1521 vc
->vc_cursor_type
= CUR_DEFAULT
;
1522 vc
->vc_complement_mask
= vc
->vc_s_complement_mask
;
1527 vc
->vc_tab_stop
[0] = 0x01010100;
1528 vc
->vc_tab_stop
[1] =
1529 vc
->vc_tab_stop
[2] =
1530 vc
->vc_tab_stop
[3] =
1531 vc
->vc_tab_stop
[4] = 0x01010101;
1533 vc
->vc_bell_pitch
= DEFAULT_BELL_PITCH
;
1534 vc
->vc_bell_duration
= DEFAULT_BELL_DURATION
;
1542 /* console_sem is held */
1543 static void do_con_trol(struct tty_struct
*tty
, struct vc_data
*vc
, int c
)
1546 * Control characters can be used in the _middle_
1547 * of an escape sequence.
1553 if (vc
->vc_bell_duration
)
1554 kd_mksound(vc
->vc_bell_pitch
, vc
->vc_bell_duration
);
1560 vc
->vc_pos
-= (vc
->vc_x
<< 1);
1561 while (vc
->vc_x
< vc
->vc_cols
- 1) {
1563 if (vc
->vc_tab_stop
[vc
->vc_x
>> 5] & (1 << (vc
->vc_x
& 31)))
1566 vc
->vc_pos
+= (vc
->vc_x
<< 1);
1568 case 10: case 11: case 12:
1570 if (!is_kbd(vc
, lnm
))
1577 vc
->vc_translate
= set_translate(vc
->vc_G1_charset
, vc
);
1578 vc
->vc_disp_ctrl
= 1;
1582 vc
->vc_translate
= set_translate(vc
->vc_G0_charset
, vc
);
1583 vc
->vc_disp_ctrl
= 0;
1586 vc
->vc_state
= ESnormal
;
1589 vc
->vc_state
= ESesc
;
1595 vc
->vc_state
= ESsquare
;
1598 switch(vc
->vc_state
) {
1600 vc
->vc_state
= ESnormal
;
1603 vc
->vc_state
= ESsquare
;
1606 vc
->vc_state
= ESnonstd
;
1609 vc
->vc_state
= ESpercent
;
1622 vc
->vc_tab_stop
[vc
->vc_x
>> 5] |= (1 << (vc
->vc_x
& 31));
1634 vc
->vc_state
= ESsetG0
;
1637 vc
->vc_state
= ESsetG1
;
1640 vc
->vc_state
= EShash
;
1643 reset_terminal(vc
, 1);
1645 case '>': /* Numeric keypad */
1646 clr_kbd(vc
, kbdapplic
);
1648 case '=': /* Appl. keypad */
1649 set_kbd(vc
, kbdapplic
);
1654 if (c
=='P') { /* palette escape sequence */
1655 for (vc
->vc_npar
= 0; vc
->vc_npar
< NPAR
; vc
->vc_npar
++)
1656 vc
->vc_par
[vc
->vc_npar
] = 0;
1658 vc
->vc_state
= ESpalette
;
1660 } else if (c
=='R') { /* reset palette */
1662 vc
->vc_state
= ESnormal
;
1664 vc
->vc_state
= ESnormal
;
1667 if ( (c
>='0'&&c
<='9') || (c
>='A'&&c
<='F') || (c
>='a'&&c
<='f') ) {
1668 vc
->vc_par
[vc
->vc_npar
++] = (c
> '9' ? (c
& 0xDF) - 'A' + 10 : c
- '0');
1669 if (vc
->vc_npar
== 7) {
1670 int i
= vc
->vc_par
[0] * 3, j
= 1;
1671 vc
->vc_palette
[i
] = 16 * vc
->vc_par
[j
++];
1672 vc
->vc_palette
[i
++] += vc
->vc_par
[j
++];
1673 vc
->vc_palette
[i
] = 16 * vc
->vc_par
[j
++];
1674 vc
->vc_palette
[i
++] += vc
->vc_par
[j
++];
1675 vc
->vc_palette
[i
] = 16 * vc
->vc_par
[j
++];
1676 vc
->vc_palette
[i
] += vc
->vc_par
[j
];
1678 vc
->vc_state
= ESnormal
;
1681 vc
->vc_state
= ESnormal
;
1684 for (vc
->vc_npar
= 0; vc
->vc_npar
< NPAR
; vc
->vc_npar
++)
1685 vc
->vc_par
[vc
->vc_npar
] = 0;
1687 vc
->vc_state
= ESgetpars
;
1688 if (c
== '[') { /* Function key */
1689 vc
->vc_state
=ESfunckey
;
1692 vc
->vc_ques
= (c
== '?');
1696 if (c
== ';' && vc
->vc_npar
< NPAR
- 1) {
1699 } else if (c
>='0' && c
<='9') {
1700 vc
->vc_par
[vc
->vc_npar
] *= 10;
1701 vc
->vc_par
[vc
->vc_npar
] += c
- '0';
1704 vc
->vc_state
= ESgotpars
;
1706 vc
->vc_state
= ESnormal
;
1717 vc
->vc_cursor_type
= vc
->vc_par
[0] | (vc
->vc_par
[1] << 8) | (vc
->vc_par
[2] << 16);
1719 vc
->vc_cursor_type
= CUR_DEFAULT
;
1727 vc
->vc_complement_mask
= vc
->vc_par
[0] << 8 | vc
->vc_par
[1];
1729 vc
->vc_complement_mask
= vc
->vc_s_complement_mask
;
1735 if (vc
->vc_par
[0] == 5)
1737 else if (vc
->vc_par
[0] == 6)
1738 cursor_report(vc
, tty
);
1750 gotoxy(vc
, vc
->vc_par
[0], vc
->vc_y
);
1755 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
- vc
->vc_par
[0]);
1760 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
+ vc
->vc_par
[0]);
1765 gotoxy(vc
, vc
->vc_x
+ vc
->vc_par
[0], vc
->vc_y
);
1770 gotoxy(vc
, vc
->vc_x
- vc
->vc_par
[0], vc
->vc_y
);
1775 gotoxy(vc
, 0, vc
->vc_y
+ vc
->vc_par
[0]);
1780 gotoxy(vc
, 0, vc
->vc_y
- vc
->vc_par
[0]);
1785 gotoxay(vc
, vc
->vc_x
,vc
->vc_par
[0]);
1792 gotoxay(vc
, vc
->vc_par
[1], vc
->vc_par
[0]);
1795 csi_J(vc
, vc
->vc_par
[0]);
1798 csi_K(vc
, vc
->vc_par
[0]);
1801 csi_L(vc
, vc
->vc_par
[0]);
1804 csi_M(vc
, vc
->vc_par
[0]);
1807 csi_P(vc
, vc
->vc_par
[0]);
1815 vc
->vc_tab_stop
[vc
->vc_x
>> 5] &= ~(1 << (vc
->vc_x
& 31));
1816 else if (vc
->vc_par
[0] == 3) {
1817 vc
->vc_tab_stop
[0] =
1818 vc
->vc_tab_stop
[1] =
1819 vc
->vc_tab_stop
[2] =
1820 vc
->vc_tab_stop
[3] =
1821 vc
->vc_tab_stop
[4] = 0;
1827 case 'q': /* DECLL - but only 3 leds */
1828 /* map 0,1,2,3 to 0,1,2,4 */
1829 if (vc
->vc_par
[0] < 4)
1830 setledstate(kbd_table
+ vc
->vc_num
,
1831 (vc
->vc_par
[0] < 3) ? vc
->vc_par
[0] : 4);
1837 vc
->vc_par
[1] = vc
->vc_rows
;
1838 /* Minimum allowed region is 2 lines */
1839 if (vc
->vc_par
[0] < vc
->vc_par
[1] &&
1840 vc
->vc_par
[1] <= vc
->vc_rows
) {
1841 vc
->vc_top
= vc
->vc_par
[0] - 1;
1842 vc
->vc_bottom
= vc
->vc_par
[1];
1853 csi_X(vc
, vc
->vc_par
[0]);
1856 csi_at(vc
, vc
->vc_par
[0]);
1858 case ']': /* setterm functions */
1859 setterm_command(vc
);
1864 vc
->vc_state
= ESnormal
;
1866 case '@': /* defined in ISO 2022 */
1869 case 'G': /* prelim official escape code */
1870 case '8': /* retained for compatibility */
1876 vc
->vc_state
= ESnormal
;
1879 vc
->vc_state
= ESnormal
;
1881 /* DEC screen alignment test. kludge :-) */
1882 vc
->vc_video_erase_char
=
1883 (vc
->vc_video_erase_char
& 0xff00) | 'E';
1885 vc
->vc_video_erase_char
=
1886 (vc
->vc_video_erase_char
& 0xff00) | ' ';
1887 do_update_region(vc
, vc
->vc_origin
, vc
->vc_screenbuf_size
/ 2);
1892 vc
->vc_G0_charset
= GRAF_MAP
;
1894 vc
->vc_G0_charset
= LAT1_MAP
;
1896 vc
->vc_G0_charset
= IBMPC_MAP
;
1898 vc
->vc_G0_charset
= USER_MAP
;
1899 if (vc
->vc_charset
== 0)
1900 vc
->vc_translate
= set_translate(vc
->vc_G0_charset
, vc
);
1901 vc
->vc_state
= ESnormal
;
1905 vc
->vc_G1_charset
= GRAF_MAP
;
1907 vc
->vc_G1_charset
= LAT1_MAP
;
1909 vc
->vc_G1_charset
= IBMPC_MAP
;
1911 vc
->vc_G1_charset
= USER_MAP
;
1912 if (vc
->vc_charset
== 1)
1913 vc
->vc_translate
= set_translate(vc
->vc_G1_charset
, vc
);
1914 vc
->vc_state
= ESnormal
;
1917 vc
->vc_state
= ESnormal
;
1921 /* This is a temporary buffer used to prepare a tty console write
1922 * so that we can easily avoid touching user space while holding the
1923 * console spinlock. It is allocated in con_init and is shared by
1924 * this code and the vc_screen read/write tty calls.
1926 * We have to allocate this statically in the kernel data section
1927 * since console_init (and thus con_init) are called before any
1928 * kernel memory allocation is available.
1930 char con_buf
[CON_BUF_SIZE
];
1931 DECLARE_MUTEX(con_buf_sem
);
1933 /* acquires console_sem */
1934 static int do_con_write(struct tty_struct
*tty
, const unsigned char *buf
, int count
)
1936 #ifdef VT_BUF_VRAM_ONLY
1937 #define FLUSH do { } while(0);
1939 #define FLUSH if (draw_x >= 0) { \
1940 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
1945 int c
, tc
, ok
, n
= 0, draw_x
= -1;
1946 unsigned int currcons
;
1947 unsigned long draw_from
= 0, draw_to
= 0;
1949 u16 himask
, charmask
;
1950 const unsigned char *orig_buf
= NULL
;
1958 acquire_console_sem();
1959 vc
= tty
->driver_data
;
1961 printk(KERN_ERR
"vt: argh, driver_data is NULL !\n");
1962 release_console_sem();
1966 currcons
= vc
->vc_num
;
1967 if (!vc_cons_allocated(currcons
)) {
1968 /* could this happen? */
1969 static int error
= 0;
1972 printk("con_write: tty %d not allocated\n", currcons
+1);
1974 release_console_sem();
1977 release_console_sem();
1982 /* At this point 'buf' is guaranteed to be a kernel buffer
1983 * and therefore no access to userspace (and therefore sleeping)
1984 * will be needed. The con_buf_sem serializes all tty based
1985 * console rendering and vcs write/read operations. We hold
1986 * the console spinlock during the entire write.
1989 acquire_console_sem();
1991 vc
= tty
->driver_data
;
1993 printk(KERN_ERR
"vt: argh, driver_data _became_ NULL !\n");
1994 release_console_sem();
1998 himask
= vc
->vc_hi_font_mask
;
1999 charmask
= himask
? 0x1ff : 0xff;
2001 /* undraw cursor first */
2005 while (!tty
->stopped
&& count
) {
2012 /* Do no translation at all in control states */
2013 if (vc
->vc_state
!= ESnormal
) {
2015 } else if (vc
->vc_utf
&& !vc
->vc_disp_ctrl
) {
2016 /* Combine UTF-8 into Unicode */
2017 /* Malformed sequences as sequences of replacement glyphs */
2020 if (vc
->vc_utf_count
) {
2021 if ((c
& 0xc0) == 0x80) {
2022 vc
->vc_utf_char
= (vc
->vc_utf_char
<< 6) | (c
& 0x3f);
2023 if (--vc
->vc_utf_count
) {
2027 tc
= c
= vc
->vc_utf_char
;
2029 goto replacement_glyph
;
2032 if ((c
& 0xe0) == 0xc0) {
2033 vc
->vc_utf_count
= 1;
2034 vc
->vc_utf_char
= (c
& 0x1f);
2035 } else if ((c
& 0xf0) == 0xe0) {
2036 vc
->vc_utf_count
= 2;
2037 vc
->vc_utf_char
= (c
& 0x0f);
2038 } else if ((c
& 0xf8) == 0xf0) {
2039 vc
->vc_utf_count
= 3;
2040 vc
->vc_utf_char
= (c
& 0x07);
2041 } else if ((c
& 0xfc) == 0xf8) {
2042 vc
->vc_utf_count
= 4;
2043 vc
->vc_utf_char
= (c
& 0x03);
2044 } else if ((c
& 0xfe) == 0xfc) {
2045 vc
->vc_utf_count
= 5;
2046 vc
->vc_utf_char
= (c
& 0x01);
2048 goto replacement_glyph
;
2052 if (vc
->vc_utf_count
)
2053 goto replacement_glyph
;
2056 } else { /* no utf or alternate charset mode */
2057 tc
= vc
->vc_translate
[vc
->vc_toggle_meta
? (c
| 0x80) : c
];
2060 /* If the original code was a control character we
2061 * only allow a glyph to be displayed if the code is
2062 * not normally used (such as for cursor movement) or
2063 * if the disp_ctrl mode has been explicitly enabled.
2064 * Certain characters (as given by the CTRL_ALWAYS
2065 * bitmap) are always displayed as control characters,
2066 * as the console would be pretty useless without
2067 * them; to display an arbitrary font position use the
2068 * direct-to-font zone in UTF-8 mode.
2070 ok
= tc
&& (c
>= 32 ||
2071 !(vc
->vc_disp_ctrl
? (CTRL_ALWAYS
>> c
) & 1 :
2072 vc
->vc_utf
|| ((CTRL_ACTION
>> c
) & 1)))
2073 && (c
!= 127 || vc
->vc_disp_ctrl
)
2076 if (vc
->vc_state
== ESnormal
&& ok
) {
2077 /* Now try to find out how to display it */
2078 tc
= conv_uni_to_pc(vc
, tc
);
2079 if (tc
& ~charmask
) {
2081 /* If we got -4 (not found) then see if we have
2082 defined a replacement character (U+FFFD) */
2084 tc
= conv_uni_to_pc(vc
, 0xfffd);
2085 if (!(tc
& ~charmask
))
2087 } else if ( tc
!= -3 )
2088 continue; /* nothing to display */
2089 /* no hash table or no replacement --
2090 * hope for the best */
2091 if ( c
& ~charmask
)
2098 if (vc
->vc_need_wrap
|| vc
->vc_decim
)
2100 if (vc
->vc_need_wrap
) {
2107 ((vc
->vc_attr
<< 8) & ~himask
) + ((tc
& 0x100) ? himask
: 0) + (tc
& 0xff) :
2108 (vc
->vc_attr
<< 8) + tc
,
2109 (u16
*) vc
->vc_pos
);
2110 if (DO_UPDATE(vc
) && draw_x
< 0) {
2112 draw_from
= vc
->vc_pos
;
2114 if (vc
->vc_x
== vc
->vc_cols
- 1) {
2115 vc
->vc_need_wrap
= vc
->vc_decawm
;
2116 draw_to
= vc
->vc_pos
+ 2;
2119 draw_to
= (vc
->vc_pos
+= 2);
2121 if (vc
->vc_utf_count
) {
2126 vc
->vc_utf_count
= 0;
2128 goto rescan_last_byte
;
2133 do_con_trol(tty
, vc
, orig
);
2136 console_conditional_schedule();
2137 release_console_sem();
2145 * This is the console switching callback.
2147 * Doing console switching in a process context allows
2148 * us to do the switches asynchronously (needed when we want
2149 * to switch due to a keyboard interrupt). Synchronization
2150 * with other console code and prevention of re-entrancy is
2151 * ensured with console_sem.
2153 static void console_callback(void *ignored
)
2155 acquire_console_sem();
2157 if (want_console
>= 0) {
2158 if (want_console
!= fg_console
&&
2159 vc_cons_allocated(want_console
)) {
2160 hide_cursor(vc_cons
[fg_console
].d
);
2161 change_console(vc_cons
[want_console
].d
);
2162 /* we only changed when the console had already
2163 been allocated - a new console is not created
2164 in an interrupt routine */
2168 if (do_poke_blanked_console
) { /* do not unblank for a LED change */
2169 do_poke_blanked_console
= 0;
2170 poke_blanked_console();
2172 if (scrollback_delta
) {
2173 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
2175 if (vc
->vc_mode
== KD_TEXT
)
2176 vc
->vc_sw
->con_scrolldelta(vc
, scrollback_delta
);
2177 scrollback_delta
= 0;
2179 if (blank_timer_expired
) {
2181 blank_timer_expired
= 0;
2184 release_console_sem();
2187 void set_console(int nr
)
2190 schedule_console_callback();
2193 struct tty_driver
*console_driver
;
2195 #ifdef CONFIG_VT_CONSOLE
2198 * Console on virtual terminal
2200 * The console must be locked when we get here.
2203 static void vt_console_print(struct console
*co
, const char *b
, unsigned count
)
2205 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
2207 static unsigned long printing
;
2208 const ushort
*start
;
2212 /* console busy or not yet initialized */
2213 if (!printable
|| test_and_set_bit(0, &printing
))
2216 if (kmsg_redirect
&& vc_cons_allocated(kmsg_redirect
- 1))
2217 vc
= vc_cons
[kmsg_redirect
- 1].d
;
2219 /* read `x' only after setting currcons properly (otherwise
2220 the `x' macro will read the x of the foreground console). */
2223 if (!vc_cons_allocated(fg_console
)) {
2225 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2229 if (vc
->vc_mode
!= KD_TEXT
)
2232 /* undraw cursor first */
2236 start
= (ushort
*)vc
->vc_pos
;
2238 /* Contrived structure to try to emulate original need_wrap behaviour
2239 * Problems caused when we have need_wrap set on '\n' character */
2242 if (c
== 10 || c
== 13 || c
== 8 || vc
->vc_need_wrap
) {
2244 if (CON_IS_VISIBLE(vc
))
2245 vc
->vc_sw
->con_putcs(vc
, start
, cnt
, vc
->vc_y
, vc
->vc_x
);
2247 if (vc
->vc_need_wrap
)
2251 if (c
== 8) { /* backspace */
2253 start
= (ushort
*)vc
->vc_pos
;
2260 start
= (ushort
*)vc
->vc_pos
;
2262 if (c
== 10 || c
== 13)
2265 scr_writew((vc
->vc_attr
<< 8) + c
, (unsigned short *)vc
->vc_pos
);
2267 if (myx
== vc
->vc_cols
- 1) {
2268 vc
->vc_need_wrap
= 1;
2275 if (CON_IS_VISIBLE(vc
))
2276 vc
->vc_sw
->con_putcs(vc
, start
, cnt
, vc
->vc_y
, vc
->vc_x
);
2278 if (vc
->vc_x
== vc
->vc_cols
) {
2280 vc
->vc_need_wrap
= 1;
2286 clear_bit(0, &printing
);
2289 static struct tty_driver
*vt_console_device(struct console
*c
, int *index
)
2291 *index
= c
->index
? c
->index
-1 : fg_console
;
2292 return console_driver
;
2295 static struct console vt_console_driver
= {
2297 .write
= vt_console_print
,
2298 .device
= vt_console_device
,
2299 .unblank
= unblank_screen
,
2300 .flags
= CON_PRINTBUFFER
,
2306 * Handling of Linux-specific VC ioctls
2310 * Generally a bit racy with respect to console_sem().
2312 * There are some functions which don't need it.
2314 * There are some functions which can sleep for arbitrary periods
2315 * (paste_selection) but we don't need the lock there anyway.
2317 * set_selection has locking, and definitely needs it
2320 int tioclinux(struct tty_struct
*tty
, unsigned long arg
)
2323 char __user
*p
= (char __user
*)arg
;
2327 if (tty
->driver
->type
!= TTY_DRIVER_TYPE_CONSOLE
)
2329 if (current
->signal
->tty
!= tty
&& !capable(CAP_SYS_ADMIN
))
2331 if (get_user(type
, p
))
2337 acquire_console_sem();
2338 ret
= set_selection((struct tiocl_selection __user
*)(p
+1), tty
);
2339 release_console_sem();
2341 case TIOCL_PASTESEL
:
2342 ret
= paste_selection(tty
);
2344 case TIOCL_UNBLANKSCREEN
:
2345 acquire_console_sem();
2347 release_console_sem();
2349 case TIOCL_SELLOADLUT
:
2350 ret
= sel_loadlut(p
);
2352 case TIOCL_GETSHIFTSTATE
:
2355 * Make it possible to react to Shift+Mousebutton.
2356 * Note that 'shift_state' is an undocumented
2357 * kernel-internal variable; programs not closely
2358 * related to the kernel should not use this.
2361 ret
= __put_user(data
, p
);
2363 case TIOCL_GETMOUSEREPORTING
:
2364 data
= mouse_reporting();
2365 ret
= __put_user(data
, p
);
2367 case TIOCL_SETVESABLANK
:
2368 set_vesa_blanking(p
);
2370 case TIOCL_GETKMSGREDIRECT
:
2371 data
= kmsg_redirect
;
2372 ret
= __put_user(data
, p
);
2374 case TIOCL_SETKMSGREDIRECT
:
2375 if (!capable(CAP_SYS_ADMIN
)) {
2378 if (get_user(data
, p
+1))
2381 kmsg_redirect
= data
;
2384 case TIOCL_GETFGCONSOLE
:
2387 case TIOCL_SCROLLCONSOLE
:
2388 if (get_user(lines
, (s32 __user
*)(p
+4))) {
2391 scrollfront(vc_cons
[fg_console
].d
, lines
);
2395 case TIOCL_BLANKSCREEN
: /* until explicitly unblanked, not only poked */
2396 acquire_console_sem();
2399 release_console_sem();
2401 case TIOCL_BLANKEDSCREEN
:
2402 ret
= console_blanked
;
2412 * /dev/ttyN handling
2415 static int con_write(struct tty_struct
*tty
, const unsigned char *buf
, int count
)
2419 retval
= do_con_write(tty
, buf
, count
);
2420 con_flush_chars(tty
);
2425 static void con_put_char(struct tty_struct
*tty
, unsigned char ch
)
2428 return; /* n_r3964 calls put_char() from interrupt context */
2429 do_con_write(tty
, &ch
, 1);
2432 static int con_write_room(struct tty_struct
*tty
)
2436 return 4096; /* No limit, really; we're not buffering */
2439 static int con_chars_in_buffer(struct tty_struct
*tty
)
2441 return 0; /* we're not buffering */
2445 * con_throttle and con_unthrottle are only used for
2446 * paste_selection(), which has to stuff in a large number of
2449 static void con_throttle(struct tty_struct
*tty
)
2453 static void con_unthrottle(struct tty_struct
*tty
)
2455 struct vc_data
*vc
= tty
->driver_data
;
2457 wake_up_interruptible(&vc
->paste_wait
);
2461 * Turn the Scroll-Lock LED on when the tty is stopped
2463 static void con_stop(struct tty_struct
*tty
)
2468 console_num
= tty
->index
;
2469 if (!vc_cons_allocated(console_num
))
2471 set_vc_kbd_led(kbd_table
+ console_num
, VC_SCROLLOCK
);
2476 * Turn the Scroll-Lock LED off when the console is started
2478 static void con_start(struct tty_struct
*tty
)
2483 console_num
= tty
->index
;
2484 if (!vc_cons_allocated(console_num
))
2486 clr_vc_kbd_led(kbd_table
+ console_num
, VC_SCROLLOCK
);
2490 static void con_flush_chars(struct tty_struct
*tty
)
2494 if (in_interrupt()) /* from flush_to_ldisc */
2497 /* if we race with con_close(), vt may be null */
2498 acquire_console_sem();
2499 vc
= tty
->driver_data
;
2502 release_console_sem();
2506 * Allocate the console screen memory.
2508 static int con_open(struct tty_struct
*tty
, struct file
*filp
)
2510 unsigned int currcons
= tty
->index
;
2513 acquire_console_sem();
2514 if (tty
->driver_data
== NULL
) {
2515 ret
= vc_allocate(currcons
);
2517 struct vc_data
*vc
= vc_cons
[currcons
].d
;
2518 tty
->driver_data
= vc
;
2521 if (!tty
->winsize
.ws_row
&& !tty
->winsize
.ws_col
) {
2522 tty
->winsize
.ws_row
= vc_cons
[currcons
].d
->vc_rows
;
2523 tty
->winsize
.ws_col
= vc_cons
[currcons
].d
->vc_cols
;
2525 release_console_sem();
2526 vcs_make_sysfs(tty
);
2530 release_console_sem();
2535 * We take tty_mutex in here to prevent another thread from coming in via init_dev
2536 * and taking a ref against the tty while we're in the process of forgetting
2537 * about it and cleaning things up.
2539 * This is because vcs_remove_sysfs() can sleep and will drop the BKL.
2541 static void con_close(struct tty_struct
*tty
, struct file
*filp
)
2543 mutex_lock(&tty_mutex
);
2544 acquire_console_sem();
2545 if (tty
&& tty
->count
== 1) {
2546 struct vc_data
*vc
= tty
->driver_data
;
2550 tty
->driver_data
= NULL
;
2551 release_console_sem();
2552 vcs_remove_sysfs(tty
);
2553 mutex_unlock(&tty_mutex
);
2555 * tty_mutex is released, but we still hold BKL, so there is
2556 * still exclusion against init_dev()
2560 release_console_sem();
2561 mutex_unlock(&tty_mutex
);
2564 static void vc_init(struct vc_data
*vc
, unsigned int rows
,
2565 unsigned int cols
, int do_clear
)
2571 vc
->vc_size_row
= cols
<< 1;
2572 vc
->vc_screenbuf_size
= vc
->vc_rows
* vc
->vc_size_row
;
2575 vc
->vc_pos
= vc
->vc_origin
;
2577 for (j
=k
=0; j
<16; j
++) {
2578 vc
->vc_palette
[k
++] = default_red
[j
] ;
2579 vc
->vc_palette
[k
++] = default_grn
[j
] ;
2580 vc
->vc_palette
[k
++] = default_blu
[j
] ;
2582 vc
->vc_def_color
= 0x07; /* white */
2583 vc
->vc_ulcolor
= 0x0f; /* bold white */
2584 vc
->vc_halfcolor
= 0x08; /* grey */
2585 init_waitqueue_head(&vc
->paste_wait
);
2586 reset_terminal(vc
, do_clear
);
2590 * This routine initializes console interrupts, and does nothing
2591 * else. If you want the screen to clear, call tty_write with
2592 * the appropriate escape-sequence.
2595 static int __init
con_init(void)
2597 const char *display_desc
= NULL
;
2599 unsigned int currcons
= 0, i
;
2601 acquire_console_sem();
2604 display_desc
= conswitchp
->con_startup();
2605 if (!display_desc
) {
2607 release_console_sem();
2611 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
2612 struct con_driver
*con_driver
= ®istered_con_driver
[i
];
2614 if (con_driver
->con
== NULL
) {
2615 con_driver
->con
= conswitchp
;
2616 con_driver
->desc
= display_desc
;
2617 con_driver
->flag
= CON_DRIVER_FLAG_INIT
;
2618 con_driver
->first
= 0;
2619 con_driver
->last
= MAX_NR_CONSOLES
- 1;
2624 for (i
= 0; i
< MAX_NR_CONSOLES
; i
++)
2625 con_driver_map
[i
] = conswitchp
;
2627 init_timer(&console_timer
);
2628 console_timer
.function
= blank_screen_t
;
2629 if (blankinterval
) {
2630 blank_state
= blank_normal_wait
;
2631 mod_timer(&console_timer
, jiffies
+ blankinterval
);
2635 * kmalloc is not running yet - we use the bootmem allocator.
2637 for (currcons
= 0; currcons
< MIN_NR_CONSOLES
; currcons
++) {
2638 vc_cons
[currcons
].d
= vc
= alloc_bootmem(sizeof(struct vc_data
));
2639 visual_init(vc
, currcons
, 1);
2640 vc
->vc_screenbuf
= (unsigned short *)alloc_bootmem(vc
->vc_screenbuf_size
);
2641 vc
->vc_kmalloced
= 0;
2642 vc_init(vc
, vc
->vc_rows
, vc
->vc_cols
,
2643 currcons
|| !vc
->vc_sw
->con_save_screen
);
2645 currcons
= fg_console
= 0;
2646 master_display_fg
= vc
= vc_cons
[currcons
].d
;
2649 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
);
2652 printk("Console: %s %s %dx%d",
2653 vc
->vc_can_do_color
? "colour" : "mono",
2654 display_desc
, vc
->vc_cols
, vc
->vc_rows
);
2658 release_console_sem();
2660 #ifdef CONFIG_VT_CONSOLE
2661 register_console(&vt_console_driver
);
2665 console_initcall(con_init
);
2667 static struct tty_operations con_ops
= {
2671 .write_room
= con_write_room
,
2672 .put_char
= con_put_char
,
2673 .flush_chars
= con_flush_chars
,
2674 .chars_in_buffer
= con_chars_in_buffer
,
2678 .throttle
= con_throttle
,
2679 .unthrottle
= con_unthrottle
,
2682 int __init
vty_init(void)
2686 console_driver
= alloc_tty_driver(MAX_NR_CONSOLES
);
2687 if (!console_driver
)
2688 panic("Couldn't allocate console driver\n");
2689 console_driver
->owner
= THIS_MODULE
;
2690 console_driver
->name
= "tty";
2691 console_driver
->name_base
= 1;
2692 console_driver
->major
= TTY_MAJOR
;
2693 console_driver
->minor_start
= 1;
2694 console_driver
->type
= TTY_DRIVER_TYPE_CONSOLE
;
2695 console_driver
->init_termios
= tty_std_termios
;
2696 console_driver
->flags
= TTY_DRIVER_REAL_RAW
| TTY_DRIVER_RESET_TERMIOS
;
2697 tty_set_operations(console_driver
, &con_ops
);
2698 if (tty_register_driver(console_driver
))
2699 panic("Couldn't register console driver\n");
2703 #ifdef CONFIG_PROM_CONSOLE
2706 #ifdef CONFIG_MDA_CONSOLE
2712 #ifndef VT_SINGLE_DRIVER
2713 #include <linux/device.h>
2715 static struct class *vtconsole_class
;
2717 static int bind_con_driver(const struct consw
*csw
, int first
, int last
,
2720 struct module
*owner
= csw
->owner
;
2721 const char *desc
= NULL
;
2722 struct con_driver
*con_driver
;
2723 int i
, j
= -1, k
= -1, retval
= -ENODEV
;
2725 if (!try_module_get(owner
))
2728 acquire_console_sem();
2730 /* check if driver is registered */
2731 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
2732 con_driver
= ®istered_con_driver
[i
];
2734 if (con_driver
->con
== csw
) {
2735 desc
= con_driver
->desc
;
2744 if (!(con_driver
->flag
& CON_DRIVER_FLAG_INIT
)) {
2746 con_driver
->flag
|= CON_DRIVER_FLAG_INIT
;
2751 module_put(conswitchp
->owner
);
2753 __module_get(owner
);
2757 first
= max(first
, con_driver
->first
);
2758 last
= min(last
, con_driver
->last
);
2760 for (i
= first
; i
<= last
; i
++) {
2762 struct vc_data
*vc
= vc_cons
[i
].d
;
2764 if (con_driver_map
[i
])
2765 module_put(con_driver_map
[i
]->owner
);
2766 __module_get(owner
);
2767 con_driver_map
[i
] = csw
;
2769 if (!vc
|| !vc
->vc_sw
)
2774 if (CON_IS_VISIBLE(vc
)) {
2779 old_was_color
= vc
->vc_can_do_color
;
2780 vc
->vc_sw
->con_deinit(vc
);
2781 vc
->vc_origin
= (unsigned long)vc
->vc_screenbuf
;
2782 visual_init(vc
, i
, 0);
2786 /* If the console changed between mono <-> color, then
2787 * the attributes in the screenbuf will be wrong. The
2788 * following resets all attributes to something sane.
2790 if (old_was_color
!= vc
->vc_can_do_color
)
2791 clear_buffer_attributes(vc
);
2794 printk("Console: switching ");
2796 printk("consoles %d-%d ", first
+1, last
+1);
2798 struct vc_data
*vc
= vc_cons
[j
].d
;
2800 printk("to %s %s %dx%d\n",
2801 vc
->vc_can_do_color
? "colour" : "mono",
2802 desc
, vc
->vc_cols
, vc
->vc_rows
);
2809 printk("to %s\n", desc
);
2813 release_console_sem();
2818 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
2819 static int con_is_graphics(const struct consw
*csw
, int first
, int last
)
2823 for (i
= first
; i
<= last
; i
++) {
2824 struct vc_data
*vc
= vc_cons
[i
].d
;
2826 if (vc
&& vc
->vc_mode
== KD_GRAPHICS
) {
2835 static int unbind_con_driver(const struct consw
*csw
, int first
, int last
,
2838 struct module
*owner
= csw
->owner
;
2839 const struct consw
*defcsw
= NULL
;
2840 struct con_driver
*con_driver
= NULL
, *con_back
= NULL
;
2841 int i
, retval
= -ENODEV
;
2843 if (!try_module_get(owner
))
2846 acquire_console_sem();
2848 /* check if driver is registered and if it is unbindable */
2849 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
2850 con_driver
= ®istered_con_driver
[i
];
2852 if (con_driver
->con
== csw
&&
2853 con_driver
->flag
& CON_DRIVER_FLAG_MODULE
) {
2860 release_console_sem();
2866 /* check if backup driver exists */
2867 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
2868 con_back
= ®istered_con_driver
[i
];
2870 if (con_back
->con
&&
2871 !(con_back
->flag
& CON_DRIVER_FLAG_MODULE
)) {
2872 defcsw
= con_back
->con
;
2879 release_console_sem();
2883 if (!con_is_bound(csw
)) {
2884 release_console_sem();
2888 first
= max(first
, con_driver
->first
);
2889 last
= min(last
, con_driver
->last
);
2891 for (i
= first
; i
<= last
; i
++) {
2892 if (con_driver_map
[i
] == csw
) {
2893 module_put(csw
->owner
);
2894 con_driver_map
[i
] = NULL
;
2898 if (!con_is_bound(defcsw
)) {
2899 const struct consw
*defconsw
= conswitchp
;
2901 defcsw
->con_startup();
2902 con_back
->flag
|= CON_DRIVER_FLAG_INIT
;
2904 * vgacon may change the default driver to point
2905 * to dummycon, we restore it here...
2907 conswitchp
= defconsw
;
2910 if (!con_is_bound(csw
))
2911 con_driver
->flag
&= ~CON_DRIVER_FLAG_INIT
;
2913 release_console_sem();
2914 /* ignore return value, binding should not fail */
2915 bind_con_driver(defcsw
, first
, last
, deflt
);
2922 static int vt_bind(struct con_driver
*con
)
2924 const struct consw
*defcsw
= NULL
, *csw
= NULL
;
2925 int i
, more
= 1, first
= -1, last
= -1, deflt
= 0;
2927 if (!con
->con
|| !(con
->flag
& CON_DRIVER_FLAG_MODULE
) ||
2928 con_is_graphics(con
->con
, con
->first
, con
->last
))
2933 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
2934 struct con_driver
*con
= ®istered_con_driver
[i
];
2936 if (con
->con
&& !(con
->flag
& CON_DRIVER_FLAG_MODULE
)) {
2948 for (i
= con
->first
; i
<= con
->last
; i
++) {
2949 if (con_driver_map
[i
] == defcsw
) {
2954 } else if (first
!= -1)
2958 if (first
== 0 && last
== MAX_NR_CONSOLES
-1)
2962 bind_con_driver(csw
, first
, last
, deflt
);
2973 static int vt_unbind(struct con_driver
*con
)
2975 const struct consw
*csw
= NULL
;
2976 int i
, more
= 1, first
= -1, last
= -1, deflt
= 0;
2978 if (!con
->con
|| !(con
->flag
& CON_DRIVER_FLAG_MODULE
) ||
2979 con_is_graphics(con
->con
, con
->first
, con
->last
))
2987 for (i
= con
->first
; i
<= con
->last
; i
++) {
2988 if (con_driver_map
[i
] == csw
) {
2993 } else if (first
!= -1)
2997 if (first
== 0 && last
== MAX_NR_CONSOLES
-1)
3001 unbind_con_driver(csw
, first
, last
, deflt
);
3012 static inline int vt_bind(struct con_driver
*con
)
3016 static inline int vt_unbind(struct con_driver
*con
)
3020 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3022 static ssize_t
store_bind(struct class_device
*class_device
,
3023 const char *buf
, size_t count
)
3025 struct con_driver
*con
= class_get_devdata(class_device
);
3026 int bind
= simple_strtoul(buf
, NULL
, 0);
3036 static ssize_t
show_bind(struct class_device
*class_device
, char *buf
)
3038 struct con_driver
*con
= class_get_devdata(class_device
);
3039 int bind
= con_is_bound(con
->con
);
3041 return snprintf(buf
, PAGE_SIZE
, "%i\n", bind
);
3044 static ssize_t
show_name(struct class_device
*class_device
, char *buf
)
3046 struct con_driver
*con
= class_get_devdata(class_device
);
3048 return snprintf(buf
, PAGE_SIZE
, "%s %s\n",
3049 (con
->flag
& CON_DRIVER_FLAG_MODULE
) ? "(M)" : "(S)",
3054 static struct class_device_attribute class_device_attrs
[] = {
3055 __ATTR(bind
, S_IRUGO
|S_IWUSR
, show_bind
, store_bind
),
3056 __ATTR(name
, S_IRUGO
, show_name
, NULL
),
3059 static int vtconsole_init_class_device(struct con_driver
*con
)
3063 class_set_devdata(con
->class_dev
, con
);
3064 for (i
= 0; i
< ARRAY_SIZE(class_device_attrs
); i
++)
3065 class_device_create_file(con
->class_dev
,
3066 &class_device_attrs
[i
]);
3071 static void vtconsole_deinit_class_device(struct con_driver
*con
)
3075 for (i
= 0; i
< ARRAY_SIZE(class_device_attrs
); i
++)
3076 class_device_remove_file(con
->class_dev
,
3077 &class_device_attrs
[i
]);
3081 * con_is_bound - checks if driver is bound to the console
3082 * @csw: console driver
3084 * RETURNS: zero if unbound, nonzero if bound
3086 * Drivers can call this and if zero, they should release
3087 * all resources allocated on con_startup()
3089 int con_is_bound(const struct consw
*csw
)
3093 for (i
= 0; i
< MAX_NR_CONSOLES
; i
++) {
3094 if (con_driver_map
[i
] == csw
) {
3102 EXPORT_SYMBOL(con_is_bound
);
3105 * register_con_driver - register console driver to console layer
3106 * @csw: console driver
3107 * @first: the first console to take over, minimum value is 0
3108 * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1
3110 * DESCRIPTION: This function registers a console driver which can later
3111 * bind to a range of consoles specified by @first and @last. It will
3112 * also initialize the console driver by calling con_startup().
3114 int register_con_driver(const struct consw
*csw
, int first
, int last
)
3116 struct module
*owner
= csw
->owner
;
3117 struct con_driver
*con_driver
;
3121 if (!try_module_get(owner
))
3124 acquire_console_sem();
3126 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3127 con_driver
= ®istered_con_driver
[i
];
3129 /* already registered */
3130 if (con_driver
->con
== csw
)
3137 desc
= csw
->con_startup();
3144 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3145 con_driver
= ®istered_con_driver
[i
];
3147 if (con_driver
->con
== NULL
) {
3148 con_driver
->con
= csw
;
3149 con_driver
->desc
= desc
;
3150 con_driver
->node
= i
;
3151 con_driver
->flag
= CON_DRIVER_FLAG_MODULE
|
3152 CON_DRIVER_FLAG_INIT
;
3153 con_driver
->first
= first
;
3154 con_driver
->last
= last
;
3163 con_driver
->class_dev
= class_device_create(vtconsole_class
, NULL
,
3164 MKDEV(0, con_driver
->node
),
3168 if (IS_ERR(con_driver
->class_dev
)) {
3169 printk(KERN_WARNING
"Unable to create class_device for %s; "
3170 "errno = %ld\n", con_driver
->desc
,
3171 PTR_ERR(con_driver
->class_dev
));
3172 con_driver
->class_dev
= NULL
;
3174 vtconsole_init_class_device(con_driver
);
3177 release_console_sem();
3181 EXPORT_SYMBOL(register_con_driver
);
3184 * unregister_con_driver - unregister console driver from console layer
3185 * @csw: console driver
3187 * DESCRIPTION: All drivers that registers to the console layer must
3188 * call this function upon exit, or if the console driver is in a state
3189 * where it won't be able to handle console services, such as the
3190 * framebuffer console without loaded framebuffer drivers.
3192 * The driver must unbind first prior to unregistration.
3194 int unregister_con_driver(const struct consw
*csw
)
3196 int i
, retval
= -ENODEV
;
3198 acquire_console_sem();
3200 /* cannot unregister a bound driver */
3201 if (con_is_bound(csw
))
3204 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3205 struct con_driver
*con_driver
= ®istered_con_driver
[i
];
3207 if (con_driver
->con
== csw
&&
3208 con_driver
->flag
& CON_DRIVER_FLAG_MODULE
) {
3209 vtconsole_deinit_class_device(con_driver
);
3210 class_device_destroy(vtconsole_class
,
3211 MKDEV(0, con_driver
->node
));
3212 con_driver
->con
= NULL
;
3213 con_driver
->desc
= NULL
;
3214 con_driver
->class_dev
= NULL
;
3215 con_driver
->node
= 0;
3216 con_driver
->flag
= 0;
3217 con_driver
->first
= 0;
3218 con_driver
->last
= 0;
3224 release_console_sem();
3227 EXPORT_SYMBOL(unregister_con_driver
);
3230 * If we support more console drivers, this function is used
3231 * when a driver wants to take over some existing consoles
3232 * and become default driver for newly opened ones.
3234 * take_over_console is basically a register followed by unbind
3236 int take_over_console(const struct consw
*csw
, int first
, int last
, int deflt
)
3240 err
= register_con_driver(csw
, first
, last
);
3243 bind_con_driver(csw
, first
, last
, deflt
);
3249 * give_up_console is a wrapper to unregister_con_driver. It will only
3250 * work if driver is fully unbound.
3252 void give_up_console(const struct consw
*csw
)
3254 unregister_con_driver(csw
);
3257 static int __init
vtconsole_class_init(void)
3261 vtconsole_class
= class_create(THIS_MODULE
, "vtconsole");
3262 if (IS_ERR(vtconsole_class
)) {
3263 printk(KERN_WARNING
"Unable to create vt console class; "
3264 "errno = %ld\n", PTR_ERR(vtconsole_class
));
3265 vtconsole_class
= NULL
;
3268 /* Add system drivers to sysfs */
3269 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3270 struct con_driver
*con
= ®istered_con_driver
[i
];
3272 if (con
->con
&& !con
->class_dev
) {
3274 class_device_create(vtconsole_class
, NULL
,
3275 MKDEV(0, con
->node
), NULL
,
3276 "vtcon%i", con
->node
);
3278 if (IS_ERR(con
->class_dev
)) {
3279 printk(KERN_WARNING
"Unable to create "
3280 "class_device for %s; errno = %ld\n",
3281 con
->desc
, PTR_ERR(con
->class_dev
));
3282 con
->class_dev
= NULL
;
3284 vtconsole_init_class_device(con
);
3291 postcore_initcall(vtconsole_class_init
);
3299 static void set_vesa_blanking(char __user
*p
)
3302 get_user(mode
, p
+ 1);
3303 vesa_blank_mode
= (mode
< 4) ? mode
: 0;
3306 void do_blank_screen(int entering_gfx
)
3308 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
3311 WARN_CONSOLE_UNLOCKED();
3313 if (console_blanked
) {
3314 if (blank_state
== blank_vesa_wait
) {
3315 blank_state
= blank_off
;
3316 vc
->vc_sw
->con_blank(vc
, vesa_blank_mode
+ 1, 0);
3320 if (blank_state
!= blank_normal_wait
)
3322 blank_state
= blank_off
;
3324 /* entering graphics mode? */
3328 vc
->vc_sw
->con_blank(vc
, -1, 1);
3329 console_blanked
= fg_console
+ 1;
3334 /* don't blank graphics */
3335 if (vc
->vc_mode
!= KD_TEXT
) {
3336 console_blanked
= fg_console
+ 1;
3341 del_timer_sync(&console_timer
);
3342 blank_timer_expired
= 0;
3345 /* In case we need to reset origin, blanking hook returns 1 */
3346 i
= vc
->vc_sw
->con_blank(vc
, vesa_off_interval
? 1 : (vesa_blank_mode
+ 1), 0);
3347 console_blanked
= fg_console
+ 1;
3351 if (console_blank_hook
&& console_blank_hook(1))
3354 if (vesa_off_interval
&& vesa_blank_mode
) {
3355 blank_state
= blank_vesa_wait
;
3356 mod_timer(&console_timer
, jiffies
+ vesa_off_interval
);
3359 EXPORT_SYMBOL(do_blank_screen
);
3362 * Called by timer as well as from vt_console_driver
3364 void do_unblank_screen(int leaving_gfx
)
3368 /* This should now always be called from a "sane" (read: can schedule)
3369 * context for the sake of the low level drivers, except in the special
3370 * case of oops_in_progress
3372 if (!oops_in_progress
)
3375 WARN_CONSOLE_UNLOCKED();
3378 if (!console_blanked
)
3380 if (!vc_cons_allocated(fg_console
)) {
3382 printk("unblank_screen: tty %d not allocated ??\n", fg_console
+1);
3385 vc
= vc_cons
[fg_console
].d
;
3386 if (vc
->vc_mode
!= KD_TEXT
)
3387 return; /* but leave console_blanked != 0 */
3389 if (blankinterval
) {
3390 mod_timer(&console_timer
, jiffies
+ blankinterval
);
3391 blank_state
= blank_normal_wait
;
3394 console_blanked
= 0;
3395 if (vc
->vc_sw
->con_blank(vc
, 0, leaving_gfx
))
3396 /* Low-level driver cannot restore -> do it ourselves */
3398 if (console_blank_hook
)
3399 console_blank_hook(0);
3403 EXPORT_SYMBOL(do_unblank_screen
);
3406 * This is called by the outside world to cause a forced unblank, mostly for
3407 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
3408 * call it with 1 as an argument and so force a mode restore... that may kill
3409 * X or at least garbage the screen but would also make the Oops visible...
3411 void unblank_screen(void)
3413 do_unblank_screen(0);
3417 * We defer the timer blanking to work queue so it can take the console mutex
3418 * (console operations can still happen at irq time, but only from printk which
3419 * has the console mutex. Not perfect yet, but better than no locking
3421 static void blank_screen_t(unsigned long dummy
)
3423 if (unlikely(!keventd_up())) {
3424 mod_timer(&console_timer
, jiffies
+ blankinterval
);
3427 blank_timer_expired
= 1;
3428 schedule_work(&console_work
);
3431 void poke_blanked_console(void)
3433 WARN_CONSOLE_UNLOCKED();
3435 /* Add this so we quickly catch whoever might call us in a non
3436 * safe context. Nowadays, unblank_screen() isn't to be called in
3437 * atomic contexts and is allowed to schedule (with the special case
3438 * of oops_in_progress, but that isn't of any concern for this
3443 /* This isn't perfectly race free, but a race here would be mostly harmless,
3444 * at worse, we'll do a spurrious blank and it's unlikely
3446 del_timer(&console_timer
);
3447 blank_timer_expired
= 0;
3449 if (ignore_poke
|| !vc_cons
[fg_console
].d
|| vc_cons
[fg_console
].d
->vc_mode
== KD_GRAPHICS
)
3451 if (console_blanked
)
3453 else if (blankinterval
) {
3454 mod_timer(&console_timer
, jiffies
+ blankinterval
);
3455 blank_state
= blank_normal_wait
;
3463 static void set_palette(struct vc_data
*vc
)
3465 WARN_CONSOLE_UNLOCKED();
3467 if (vc
->vc_mode
!= KD_GRAPHICS
)
3468 vc
->vc_sw
->con_set_palette(vc
, color_table
);
3471 static int set_get_cmap(unsigned char __user
*arg
, int set
)
3475 WARN_CONSOLE_UNLOCKED();
3477 for (i
= 0; i
< 16; i
++)
3479 get_user(default_red
[i
], arg
++);
3480 get_user(default_grn
[i
], arg
++);
3481 get_user(default_blu
[i
], arg
++);
3483 put_user(default_red
[i
], arg
++);
3484 put_user(default_grn
[i
], arg
++);
3485 put_user(default_blu
[i
], arg
++);
3488 for (i
= 0; i
< MAX_NR_CONSOLES
; i
++)
3489 if (vc_cons_allocated(i
)) {
3490 for (j
= k
= 0; j
< 16; j
++) {
3491 vc_cons
[i
].d
->vc_palette
[k
++] = default_red
[j
];
3492 vc_cons
[i
].d
->vc_palette
[k
++] = default_grn
[j
];
3493 vc_cons
[i
].d
->vc_palette
[k
++] = default_blu
[j
];
3495 set_palette(vc_cons
[i
].d
);
3502 * Load palette into the DAC registers. arg points to a colour
3503 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
3506 int con_set_cmap(unsigned char __user
*arg
)
3510 acquire_console_sem();
3511 rc
= set_get_cmap (arg
,1);
3512 release_console_sem();
3517 int con_get_cmap(unsigned char __user
*arg
)
3521 acquire_console_sem();
3522 rc
= set_get_cmap (arg
,0);
3523 release_console_sem();
3528 void reset_palette(struct vc_data
*vc
)
3531 for (j
=k
=0; j
<16; j
++) {
3532 vc
->vc_palette
[k
++] = default_red
[j
];
3533 vc
->vc_palette
[k
++] = default_grn
[j
];
3534 vc
->vc_palette
[k
++] = default_blu
[j
];
3542 * Currently we only support fonts up to 32 pixels wide, at a maximum height
3543 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
3544 * depending on width) reserved for each character which is kinda wasty, but
3545 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
3546 * is upto the actual low-level console-driver convert data into its favorite
3547 * format (maybe we should add a `fontoffset' field to the `display'
3548 * structure so we won't have to convert the fontdata all the time.
3552 #define max_font_size 65536
3554 static int con_font_get(struct vc_data
*vc
, struct console_font_op
*op
)
3556 struct console_font font
;
3560 if (vc
->vc_mode
!= KD_TEXT
)
3564 font
.data
= kmalloc(max_font_size
, GFP_KERNEL
);
3570 acquire_console_sem();
3571 if (vc
->vc_sw
->con_font_get
)
3572 rc
= vc
->vc_sw
->con_font_get(vc
, &font
);
3575 release_console_sem();
3580 c
= (font
.width
+7)/8 * 32 * font
.charcount
;
3582 if (op
->data
&& font
.charcount
> op
->charcount
)
3584 if (!(op
->flags
& KD_FONT_FLAG_OLD
)) {
3585 if (font
.width
> op
->width
|| font
.height
> op
->height
)
3588 if (font
.width
!= 8)
3590 else if ((op
->height
&& font
.height
> op
->height
) ||
3597 op
->height
= font
.height
;
3598 op
->width
= font
.width
;
3599 op
->charcount
= font
.charcount
;
3601 if (op
->data
&& copy_to_user(op
->data
, font
.data
, c
))
3609 static int con_font_set(struct vc_data
*vc
, struct console_font_op
*op
)
3611 struct console_font font
;
3615 if (vc
->vc_mode
!= KD_TEXT
)
3619 if (op
->charcount
> 512)
3621 if (!op
->height
) { /* Need to guess font height [compat] */
3623 u8 __user
*charmap
= op
->data
;
3626 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
3627 so that we can get rid of this soon */
3628 if (!(op
->flags
& KD_FONT_FLAG_OLD
))
3630 for (h
= 32; h
> 0; h
--)
3631 for (i
= 0; i
< op
->charcount
; i
++) {
3632 if (get_user(tmp
, &charmap
[32*i
+h
-1]))
3641 if (op
->width
<= 0 || op
->width
> 32 || op
->height
> 32)
3643 size
= (op
->width
+7)/8 * 32 * op
->charcount
;
3644 if (size
> max_font_size
)
3646 font
.charcount
= op
->charcount
;
3647 font
.height
= op
->height
;
3648 font
.width
= op
->width
;
3649 font
.data
= kmalloc(size
, GFP_KERNEL
);
3652 if (copy_from_user(font
.data
, op
->data
, size
)) {
3656 acquire_console_sem();
3657 if (vc
->vc_sw
->con_font_set
)
3658 rc
= vc
->vc_sw
->con_font_set(vc
, &font
, op
->flags
);
3661 release_console_sem();
3666 static int con_font_default(struct vc_data
*vc
, struct console_font_op
*op
)
3668 struct console_font font
= {.width
= op
->width
, .height
= op
->height
};
3669 char name
[MAX_FONT_NAME
];
3673 if (vc
->vc_mode
!= KD_TEXT
)
3678 else if (strncpy_from_user(name
, op
->data
, MAX_FONT_NAME
- 1) < 0)
3681 name
[MAX_FONT_NAME
- 1] = 0;
3683 acquire_console_sem();
3684 if (vc
->vc_sw
->con_font_default
)
3685 rc
= vc
->vc_sw
->con_font_default(vc
, &font
, s
);
3688 release_console_sem();
3690 op
->width
= font
.width
;
3691 op
->height
= font
.height
;
3696 static int con_font_copy(struct vc_data
*vc
, struct console_font_op
*op
)
3698 int con
= op
->height
;
3701 if (vc
->vc_mode
!= KD_TEXT
)
3704 acquire_console_sem();
3705 if (!vc
->vc_sw
->con_font_copy
)
3707 else if (con
< 0 || !vc_cons_allocated(con
))
3709 else if (con
== vc
->vc_num
) /* nothing to do */
3712 rc
= vc
->vc_sw
->con_font_copy(vc
, con
);
3713 release_console_sem();
3717 int con_font_op(struct vc_data
*vc
, struct console_font_op
*op
)
3720 case KD_FONT_OP_SET
:
3721 return con_font_set(vc
, op
);
3722 case KD_FONT_OP_GET
:
3723 return con_font_get(vc
, op
);
3724 case KD_FONT_OP_SET_DEFAULT
:
3725 return con_font_default(vc
, op
);
3726 case KD_FONT_OP_COPY
:
3727 return con_font_copy(vc
, op
);
3733 * Interface exported to selection and vcs.
3736 /* used by selection */
3737 u16
screen_glyph(struct vc_data
*vc
, int offset
)
3739 u16 w
= scr_readw(screenpos(vc
, offset
, 1));
3742 if (w
& vc
->vc_hi_font_mask
)
3747 /* used by vcs - note the word offset */
3748 unsigned short *screen_pos(struct vc_data
*vc
, int w_offset
, int viewed
)
3750 return screenpos(vc
, 2 * w_offset
, viewed
);
3753 void getconsxy(struct vc_data
*vc
, unsigned char *p
)
3759 void putconsxy(struct vc_data
*vc
, unsigned char *p
)
3762 gotoxy(vc
, p
[0], p
[1]);
3766 u16
vcs_scr_readw(struct vc_data
*vc
, const u16
*org
)
3768 if ((unsigned long)org
== vc
->vc_pos
&& softcursor_original
!= -1)
3769 return softcursor_original
;
3770 return scr_readw(org
);
3773 void vcs_scr_writew(struct vc_data
*vc
, u16 val
, u16
*org
)
3775 scr_writew(val
, org
);
3776 if ((unsigned long)org
== vc
->vc_pos
) {
3777 softcursor_original
= -1;
3783 * Visible symbols for modules
3786 EXPORT_SYMBOL(color_table
);
3787 EXPORT_SYMBOL(default_red
);
3788 EXPORT_SYMBOL(default_grn
);
3789 EXPORT_SYMBOL(default_blu
);
3790 EXPORT_SYMBOL(update_region
);
3791 EXPORT_SYMBOL(redraw_screen
);
3792 EXPORT_SYMBOL(vc_resize
);
3793 EXPORT_SYMBOL(fg_console
);
3794 EXPORT_SYMBOL(console_blank_hook
);
3795 EXPORT_SYMBOL(console_blanked
);
3796 EXPORT_SYMBOL(vc_cons
);
3797 #ifndef VT_SINGLE_DRIVER
3798 EXPORT_SYMBOL(take_over_console
);
3799 EXPORT_SYMBOL(give_up_console
);