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/mutex.h>
90 #include <linux/vt_kern.h>
91 #include <linux/selection.h>
92 #include <linux/tiocl.h>
93 #include <linux/kbd_kern.h>
94 #include <linux/consolemap.h>
95 #include <linux/timer.h>
96 #include <linux/interrupt.h>
97 #include <linux/workqueue.h>
98 #include <linux/bootmem.h>
100 #include <linux/font.h>
101 #include <linux/bitops.h>
104 #include <asm/system.h>
105 #include <asm/uaccess.h>
107 #define MAX_NR_CON_DRIVER 16
109 #define CON_DRIVER_FLAG_MODULE 1
110 #define CON_DRIVER_FLAG_INIT 2
111 #define CON_DRIVER_FLAG_ATTR 4
114 const struct consw
*con
;
123 static struct con_driver registered_con_driver
[MAX_NR_CON_DRIVER
];
124 const struct consw
*conswitchp
;
126 /* A bitmap for codes <32. A bit of 1 indicates that the code
127 * corresponding to that bit number invokes some special action
128 * (such as cursor movement) and should not be displayed as a
129 * glyph unless the disp_ctrl mode is explicitly enabled.
131 #define CTRL_ACTION 0x0d00ff81
132 #define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */
135 * Here is the default bell parameters: 750HZ, 1/8th of a second
137 #define DEFAULT_BELL_PITCH 750
138 #define DEFAULT_BELL_DURATION (HZ/8)
140 struct vc vc_cons
[MAX_NR_CONSOLES
];
142 #ifndef VT_SINGLE_DRIVER
143 static const struct consw
*con_driver_map
[MAX_NR_CONSOLES
];
146 static int con_open(struct tty_struct
*, struct file
*);
147 static void vc_init(struct vc_data
*vc
, unsigned int rows
,
148 unsigned int cols
, int do_clear
);
149 static void gotoxy(struct vc_data
*vc
, int new_x
, int new_y
);
150 static void save_cur(struct vc_data
*vc
);
151 static void reset_terminal(struct vc_data
*vc
, int do_clear
);
152 static void con_flush_chars(struct tty_struct
*tty
);
153 static int set_vesa_blanking(char __user
*p
);
154 static void set_cursor(struct vc_data
*vc
);
155 static void hide_cursor(struct vc_data
*vc
);
156 static void console_callback(struct work_struct
*ignored
);
157 static void blank_screen_t(unsigned long dummy
);
158 static void set_palette(struct vc_data
*vc
);
160 static int printable
; /* Is console ready for printing? */
161 static int default_utf8
;
162 module_param(default_utf8
, int, S_IRUGO
| S_IWUSR
);
165 * ignore_poke: don't unblank the screen when things are typed. This is
166 * mainly for the privacy of braille terminal users.
168 static int ignore_poke
;
170 int do_poke_blanked_console
;
173 static int vesa_blank_mode
; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
174 static int blankinterval
= 10*60*HZ
;
175 static int vesa_off_interval
;
177 static DECLARE_WORK(console_work
, console_callback
);
180 * fg_console is the current virtual console,
181 * last_console is the last used one,
182 * want_console is the console we want to switch to,
183 * kmsg_redirect is the console for kernel messages,
187 int want_console
= -1;
191 * For each existing display, we have a pointer to console currently visible
192 * on that display, allowing consoles other than fg_console to be refreshed
193 * appropriately. Unless the low-level driver supplies its own display_fg
194 * variable, we use this one for the "master display".
196 static struct vc_data
*master_display_fg
;
199 * Unfortunately, we need to delay tty echo when we're currently writing to the
200 * console since the code is (and always was) not re-entrant, so we schedule
201 * all flip requests to process context with schedule-task() and run it from
202 * console_callback().
206 * For the same reason, we defer scrollback to the console callback.
208 static int scrollback_delta
;
211 * Hook so that the power management routines can (un)blank
212 * the console on our behalf.
214 int (*console_blank_hook
)(int);
216 static DEFINE_TIMER(console_timer
, blank_screen_t
, 0, 0);
217 static int blank_state
;
218 static int blank_timer_expired
;
226 * Low-Level Functions
229 #define IS_FG(vc) ((vc)->vc_num == fg_console)
231 #ifdef VT_BUF_VRAM_ONLY
232 #define DO_UPDATE(vc) 0
234 #define DO_UPDATE(vc) CON_IS_VISIBLE(vc)
237 static inline unsigned short *screenpos(struct vc_data
*vc
, int offset
, int viewed
)
242 p
= (unsigned short *)(vc
->vc_origin
+ offset
);
243 else if (!vc
->vc_sw
->con_screen_pos
)
244 p
= (unsigned short *)(vc
->vc_visible_origin
+ offset
);
246 p
= vc
->vc_sw
->con_screen_pos(vc
, offset
);
250 static inline void scrolldelta(int lines
)
252 scrollback_delta
+= lines
;
253 schedule_console_callback();
256 void schedule_console_callback(void)
258 schedule_work(&console_work
);
261 static void scrup(struct vc_data
*vc
, unsigned int t
, unsigned int b
, int nr
)
263 unsigned short *d
, *s
;
267 if (b
> vc
->vc_rows
|| t
>= b
|| nr
< 1)
269 if (CON_IS_VISIBLE(vc
) && vc
->vc_sw
->con_scroll(vc
, t
, b
, SM_UP
, nr
))
271 d
= (unsigned short *)(vc
->vc_origin
+ vc
->vc_size_row
* t
);
272 s
= (unsigned short *)(vc
->vc_origin
+ vc
->vc_size_row
* (t
+ nr
));
273 scr_memmovew(d
, s
, (b
- t
- nr
) * vc
->vc_size_row
);
274 scr_memsetw(d
+ (b
- t
- nr
) * vc
->vc_cols
, vc
->vc_video_erase_char
,
275 vc
->vc_size_row
* nr
);
278 static void scrdown(struct vc_data
*vc
, unsigned int t
, unsigned int b
, int nr
)
285 if (b
> vc
->vc_rows
|| t
>= b
|| nr
< 1)
287 if (CON_IS_VISIBLE(vc
) && vc
->vc_sw
->con_scroll(vc
, t
, b
, SM_DOWN
, nr
))
289 s
= (unsigned short *)(vc
->vc_origin
+ vc
->vc_size_row
* t
);
290 step
= vc
->vc_cols
* nr
;
291 scr_memmovew(s
+ step
, s
, (b
- t
- nr
) * vc
->vc_size_row
);
292 scr_memsetw(s
, vc
->vc_video_erase_char
, 2 * step
);
295 static void do_update_region(struct vc_data
*vc
, unsigned long start
, int count
)
297 #ifndef VT_BUF_VRAM_ONLY
298 unsigned int xx
, yy
, offset
;
302 if (!vc
->vc_sw
->con_getxy
) {
303 offset
= (start
- vc
->vc_origin
) / 2;
304 xx
= offset
% vc
->vc_cols
;
305 yy
= offset
/ vc
->vc_cols
;
308 start
= vc
->vc_sw
->con_getxy(vc
, start
, &nxx
, &nyy
);
312 u16 attrib
= scr_readw(p
) & 0xff00;
315 while (xx
< vc
->vc_cols
&& count
) {
316 if (attrib
!= (scr_readw(p
) & 0xff00)) {
318 vc
->vc_sw
->con_putcs(vc
, q
, p
-q
, yy
, startx
);
321 attrib
= scr_readw(p
) & 0xff00;
328 vc
->vc_sw
->con_putcs(vc
, q
, p
-q
, yy
, startx
);
333 if (vc
->vc_sw
->con_getxy
) {
335 start
= vc
->vc_sw
->con_getxy(vc
, start
, NULL
, NULL
);
341 void update_region(struct vc_data
*vc
, unsigned long start
, int count
)
343 WARN_CONSOLE_UNLOCKED();
347 do_update_region(vc
, start
, count
);
352 /* Structure of attributes is hardware-dependent */
354 static u8
build_attr(struct vc_data
*vc
, u8 _color
, u8 _intensity
, u8 _blink
,
355 u8 _underline
, u8 _reverse
, u8 _italic
)
357 if (vc
->vc_sw
->con_build_attr
)
358 return vc
->vc_sw
->con_build_attr(vc
, _color
, _intensity
,
359 _blink
, _underline
, _reverse
, _italic
);
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
)
377 (_underline
? 4 : 0) |
381 a
= (a
& 0xF0) | vc
->vc_itcolor
;
383 a
= (a
& 0xf0) | vc
->vc_ulcolor
;
384 else if (_intensity
== 0)
385 a
= (a
& 0xf0) | vc
->vc_ulcolor
;
387 a
= ((a
) & 0x88) | ((((a
) >> 4) | ((a
) << 4)) & 0x77);
392 if (vc
->vc_hi_font_mask
== 0x100)
401 static void update_attr(struct vc_data
*vc
)
403 vc
->vc_attr
= build_attr(vc
, vc
->vc_color
, vc
->vc_intensity
,
404 vc
->vc_blink
, vc
->vc_underline
,
405 vc
->vc_reverse
^ vc
->vc_decscnm
, vc
->vc_italic
);
406 vc
->vc_video_erase_char
= (build_attr(vc
, vc
->vc_color
, 1, vc
->vc_blink
, 0, vc
->vc_decscnm
, 0) << 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
= kzalloc(sizeof(struct vc_data
), GFP_KERNEL
);
735 vc_cons
[currcons
].d
= vc
;
736 INIT_WORK(&vc_cons
[currcons
].SAK_work
, vc_SAK
);
737 visual_init(vc
, currcons
, 1);
738 if (!*vc
->vc_uni_pagedir_loc
)
739 con_set_default_unimap(vc
);
740 if (!vc
->vc_kmalloced
)
741 vc
->vc_screenbuf
= kmalloc(vc
->vc_screenbuf_size
, GFP_KERNEL
);
742 if (!vc
->vc_screenbuf
) {
744 vc_cons
[currcons
].d
= NULL
;
747 vc
->vc_kmalloced
= 1;
748 vc_init(vc
, vc
->vc_rows
, vc
->vc_cols
, 1);
753 static inline int resize_screen(struct vc_data
*vc
, int width
, int height
)
755 /* Resizes the resolution of the display adapater */
758 if (vc
->vc_mode
!= KD_GRAPHICS
&& vc
->vc_sw
->con_resize
)
759 err
= vc
->vc_sw
->con_resize(vc
, width
, height
);
764 * Change # of rows and columns (0 means unchanged/the size of fg_console)
765 * [this is to be used together with some user program
766 * like resize that changes the hardware videomode]
768 #define VC_RESIZE_MAXCOL (32767)
769 #define VC_RESIZE_MAXROW (32767)
770 int vc_resize(struct vc_data
*vc
, unsigned int cols
, unsigned int lines
)
772 unsigned long old_origin
, new_origin
, new_scr_end
, rlth
, rrem
, err
= 0;
773 unsigned int old_cols
, old_rows
, old_row_size
, old_screen_size
;
774 unsigned int new_cols
, new_rows
, new_row_size
, new_screen_size
;
776 unsigned short *newscreen
;
778 WARN_CONSOLE_UNLOCKED();
783 if (cols
> VC_RESIZE_MAXCOL
|| lines
> VC_RESIZE_MAXROW
)
786 new_cols
= (cols
? cols
: vc
->vc_cols
);
787 new_rows
= (lines
? lines
: vc
->vc_rows
);
788 new_row_size
= new_cols
<< 1;
789 new_screen_size
= new_row_size
* new_rows
;
791 if (new_cols
== vc
->vc_cols
&& new_rows
== vc
->vc_rows
)
794 newscreen
= kmalloc(new_screen_size
, GFP_USER
);
798 old_rows
= vc
->vc_rows
;
799 old_cols
= vc
->vc_cols
;
800 old_row_size
= vc
->vc_size_row
;
801 old_screen_size
= vc
->vc_screenbuf_size
;
803 err
= resize_screen(vc
, new_cols
, new_rows
);
809 vc
->vc_rows
= new_rows
;
810 vc
->vc_cols
= new_cols
;
811 vc
->vc_size_row
= new_row_size
;
812 vc
->vc_screenbuf_size
= new_screen_size
;
814 rlth
= min(old_row_size
, new_row_size
);
815 rrem
= new_row_size
- rlth
;
816 old_origin
= vc
->vc_origin
;
817 new_origin
= (long) newscreen
;
818 new_scr_end
= new_origin
+ new_screen_size
;
820 if (vc
->vc_y
> new_rows
) {
821 if (old_rows
- vc
->vc_y
< new_rows
) {
823 * Cursor near the bottom, copy contents from the
826 old_origin
+= (old_rows
- new_rows
) * old_row_size
;
827 end
= vc
->vc_scr_end
;
830 * Cursor is in no man's land, copy 1/2 screenful
831 * from the top and bottom of cursor position
833 old_origin
+= (vc
->vc_y
- new_rows
/2) * old_row_size
;
834 end
= old_origin
+ (old_row_size
* new_rows
);
838 * Cursor near the top, copy contents from the top of buffer
840 end
= (old_rows
> new_rows
) ? old_origin
+
841 (old_row_size
* new_rows
) :
846 while (old_origin
< end
) {
847 scr_memcpyw((unsigned short *) new_origin
,
848 (unsigned short *) old_origin
, rlth
);
850 scr_memsetw((void *)(new_origin
+ rlth
),
851 vc
->vc_video_erase_char
, rrem
);
852 old_origin
+= old_row_size
;
853 new_origin
+= new_row_size
;
855 if (new_scr_end
> new_origin
)
856 scr_memsetw((void *)new_origin
, vc
->vc_video_erase_char
,
857 new_scr_end
- new_origin
);
858 if (vc
->vc_kmalloced
)
859 kfree(vc
->vc_screenbuf
);
860 vc
->vc_screenbuf
= newscreen
;
861 vc
->vc_kmalloced
= 1;
862 vc
->vc_screenbuf_size
= new_screen_size
;
865 /* do part of a reset_terminal() */
867 vc
->vc_bottom
= vc
->vc_rows
;
868 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
);
872 struct winsize ws
, *cws
= &vc
->vc_tty
->winsize
;
874 memset(&ws
, 0, sizeof(ws
));
875 ws
.ws_row
= vc
->vc_rows
;
876 ws
.ws_col
= vc
->vc_cols
;
877 ws
.ws_ypixel
= vc
->vc_scan_lines
;
878 if ((ws
.ws_row
!= cws
->ws_row
|| ws
.ws_col
!= cws
->ws_col
) &&
880 kill_pgrp(vc
->vc_tty
->pgrp
, SIGWINCH
, 1);
884 if (CON_IS_VISIBLE(vc
))
889 int vc_lock_resize(struct vc_data
*vc
, unsigned int cols
, unsigned int lines
)
893 acquire_console_sem();
894 rc
= vc_resize(vc
, cols
, lines
);
895 release_console_sem();
899 void vc_deallocate(unsigned int currcons
)
901 WARN_CONSOLE_UNLOCKED();
903 if (vc_cons_allocated(currcons
)) {
904 struct vc_data
*vc
= vc_cons
[currcons
].d
;
905 vc
->vc_sw
->con_deinit(vc
);
907 module_put(vc
->vc_sw
->owner
);
908 if (vc
->vc_kmalloced
)
909 kfree(vc
->vc_screenbuf
);
910 if (currcons
>= MIN_NR_CONSOLES
)
912 vc_cons
[currcons
].d
= NULL
;
920 #define set_kbd(vc, x) set_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
921 #define clr_kbd(vc, x) clr_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
922 #define is_kbd(vc, x) vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
924 #define decarm VC_REPEAT
925 #define decckm VC_CKMODE
926 #define kbdapplic VC_APPLIC
930 * this is what the terminal answers to a ESC-Z or csi0c query.
932 #define VT100ID "\033[?1;2c"
933 #define VT102ID "\033[?6c"
935 unsigned char color_table
[] = { 0, 4, 2, 6, 1, 5, 3, 7,
936 8,12,10,14, 9,13,11,15 };
938 /* the default colour table, for VGA+ colour systems */
939 int default_red
[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
940 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
941 int default_grn
[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
942 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
943 int default_blu
[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
944 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
946 module_param_array(default_red
, int, NULL
, S_IRUGO
| S_IWUSR
);
947 module_param_array(default_grn
, int, NULL
, S_IRUGO
| S_IWUSR
);
948 module_param_array(default_blu
, int, NULL
, S_IRUGO
| S_IWUSR
);
951 * gotoxy() must verify all boundaries, because the arguments
952 * might also be negative. If the given position is out of
953 * bounds, the cursor is placed at the nearest margin.
955 static void gotoxy(struct vc_data
*vc
, int new_x
, int new_y
)
962 if (new_x
>= vc
->vc_cols
)
963 vc
->vc_x
= vc
->vc_cols
- 1;
970 max_y
= vc
->vc_bottom
;
977 else if (new_y
>= max_y
)
978 vc
->vc_y
= max_y
- 1;
981 vc
->vc_pos
= vc
->vc_origin
+ vc
->vc_y
* vc
->vc_size_row
+ (vc
->vc_x
<<1);
982 vc
->vc_need_wrap
= 0;
985 /* for absolute user moves, when decom is set */
986 static void gotoxay(struct vc_data
*vc
, int new_x
, int new_y
)
988 gotoxy(vc
, new_x
, vc
->vc_decom
? (vc
->vc_top
+ new_y
) : new_y
);
991 void scrollback(struct vc_data
*vc
, int lines
)
994 lines
= vc
->vc_rows
/ 2;
998 void scrollfront(struct vc_data
*vc
, int lines
)
1001 lines
= vc
->vc_rows
/ 2;
1005 static void lf(struct vc_data
*vc
)
1007 /* don't scroll if above bottom of scrolling region, or
1008 * if below scrolling region
1010 if (vc
->vc_y
+ 1 == vc
->vc_bottom
)
1011 scrup(vc
, vc
->vc_top
, vc
->vc_bottom
, 1);
1012 else if (vc
->vc_y
< vc
->vc_rows
- 1) {
1014 vc
->vc_pos
+= vc
->vc_size_row
;
1016 vc
->vc_need_wrap
= 0;
1019 static void ri(struct vc_data
*vc
)
1021 /* don't scroll if below top of scrolling region, or
1022 * if above scrolling region
1024 if (vc
->vc_y
== vc
->vc_top
)
1025 scrdown(vc
, vc
->vc_top
, vc
->vc_bottom
, 1);
1026 else if (vc
->vc_y
> 0) {
1028 vc
->vc_pos
-= vc
->vc_size_row
;
1030 vc
->vc_need_wrap
= 0;
1033 static inline void cr(struct vc_data
*vc
)
1035 vc
->vc_pos
-= vc
->vc_x
<< 1;
1036 vc
->vc_need_wrap
= vc
->vc_x
= 0;
1039 static inline void bs(struct vc_data
*vc
)
1044 vc
->vc_need_wrap
= 0;
1048 static inline void del(struct vc_data
*vc
)
1053 static void csi_J(struct vc_data
*vc
, int vpar
)
1056 unsigned short * start
;
1059 case 0: /* erase from cursor to end of display */
1060 count
= (vc
->vc_scr_end
- vc
->vc_pos
) >> 1;
1061 start
= (unsigned short *)vc
->vc_pos
;
1062 if (DO_UPDATE(vc
)) {
1063 /* do in two stages */
1064 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, vc
->vc_x
, 1,
1065 vc
->vc_cols
- vc
->vc_x
);
1066 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
+ 1, 0,
1067 vc
->vc_rows
- vc
->vc_y
- 1,
1071 case 1: /* erase from start to cursor */
1072 count
= ((vc
->vc_pos
- vc
->vc_origin
) >> 1) + 1;
1073 start
= (unsigned short *)vc
->vc_origin
;
1074 if (DO_UPDATE(vc
)) {
1075 /* do in two stages */
1076 vc
->vc_sw
->con_clear(vc
, 0, 0, vc
->vc_y
,
1078 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, 0, 1,
1082 case 2: /* erase whole display */
1083 count
= vc
->vc_cols
* vc
->vc_rows
;
1084 start
= (unsigned short *)vc
->vc_origin
;
1086 vc
->vc_sw
->con_clear(vc
, 0, 0,
1093 scr_memsetw(start
, vc
->vc_video_erase_char
, 2 * count
);
1094 vc
->vc_need_wrap
= 0;
1097 static void csi_K(struct vc_data
*vc
, int vpar
)
1100 unsigned short * start
;
1103 case 0: /* erase from cursor to end of line */
1104 count
= vc
->vc_cols
- vc
->vc_x
;
1105 start
= (unsigned short *)vc
->vc_pos
;
1107 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, vc
->vc_x
, 1,
1108 vc
->vc_cols
- vc
->vc_x
);
1110 case 1: /* erase from start of line to cursor */
1111 start
= (unsigned short *)(vc
->vc_pos
- (vc
->vc_x
<< 1));
1112 count
= vc
->vc_x
+ 1;
1114 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, 0, 1,
1117 case 2: /* erase whole line */
1118 start
= (unsigned short *)(vc
->vc_pos
- (vc
->vc_x
<< 1));
1119 count
= vc
->vc_cols
;
1121 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, 0, 1,
1127 scr_memsetw(start
, vc
->vc_video_erase_char
, 2 * count
);
1128 vc
->vc_need_wrap
= 0;
1131 static void csi_X(struct vc_data
*vc
, int vpar
) /* erase the following vpar positions */
1137 count
= (vpar
> vc
->vc_cols
- vc
->vc_x
) ? (vc
->vc_cols
- vc
->vc_x
) : vpar
;
1139 scr_memsetw((unsigned short *)vc
->vc_pos
, vc
->vc_video_erase_char
, 2 * count
);
1141 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, vc
->vc_x
, 1, count
);
1142 vc
->vc_need_wrap
= 0;
1145 static void default_attr(struct vc_data
*vc
)
1147 vc
->vc_intensity
= 1;
1149 vc
->vc_underline
= 0;
1152 vc
->vc_color
= vc
->vc_def_color
;
1155 /* console_sem is held */
1156 static void csi_m(struct vc_data
*vc
)
1160 for (i
= 0; i
<= vc
->vc_npar
; i
++)
1161 switch (vc
->vc_par
[i
]) {
1162 case 0: /* all attributes off */
1166 vc
->vc_intensity
= 2;
1169 vc
->vc_intensity
= 0;
1175 vc
->vc_underline
= 1;
1183 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1184 * Select primary font, don't display
1185 * control chars if defined, don't set
1188 vc
->vc_translate
= set_translate(vc
->vc_charset
== 0
1190 : vc
->vc_G1_charset
, vc
);
1191 vc
->vc_disp_ctrl
= 0;
1192 vc
->vc_toggle_meta
= 0;
1194 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1195 * Select first alternate font, lets
1196 * chars < 32 be displayed as ROM chars.
1198 vc
->vc_translate
= set_translate(IBMPC_MAP
, vc
);
1199 vc
->vc_disp_ctrl
= 1;
1200 vc
->vc_toggle_meta
= 0;
1202 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1203 * Select second alternate font, toggle
1204 * high bit before displaying as ROM char.
1206 vc
->vc_translate
= set_translate(IBMPC_MAP
, vc
);
1207 vc
->vc_disp_ctrl
= 1;
1208 vc
->vc_toggle_meta
= 1;
1212 vc
->vc_intensity
= 1;
1218 vc
->vc_underline
= 0;
1226 case 38: /* ANSI X3.64-1979 (SCO-ish?)
1227 * Enables underscore, white foreground
1228 * with white underscore (Linux - use
1229 * default foreground).
1231 vc
->vc_color
= (vc
->vc_def_color
& 0x0f) | (vc
->vc_color
& 0xf0);
1232 vc
->vc_underline
= 1;
1234 case 39: /* ANSI X3.64-1979 (SCO-ish?)
1235 * Disable underline option.
1236 * Reset colour to default? It did this
1239 vc
->vc_color
= (vc
->vc_def_color
& 0x0f) | (vc
->vc_color
& 0xf0);
1240 vc
->vc_underline
= 0;
1243 vc
->vc_color
= (vc
->vc_def_color
& 0xf0) | (vc
->vc_color
& 0x0f);
1246 if (vc
->vc_par
[i
] >= 30 && vc
->vc_par
[i
] <= 37)
1247 vc
->vc_color
= color_table
[vc
->vc_par
[i
] - 30]
1248 | (vc
->vc_color
& 0xf0);
1249 else if (vc
->vc_par
[i
] >= 40 && vc
->vc_par
[i
] <= 47)
1250 vc
->vc_color
= (color_table
[vc
->vc_par
[i
] - 40] << 4)
1251 | (vc
->vc_color
& 0x0f);
1257 static void respond_string(const char *p
, struct tty_struct
*tty
)
1260 tty_insert_flip_char(tty
, *p
, 0);
1263 con_schedule_flip(tty
);
1266 static void cursor_report(struct vc_data
*vc
, struct tty_struct
*tty
)
1270 sprintf(buf
, "\033[%d;%dR", vc
->vc_y
+ (vc
->vc_decom
? vc
->vc_top
+ 1 : 1), vc
->vc_x
+ 1);
1271 respond_string(buf
, tty
);
1274 static inline void status_report(struct tty_struct
*tty
)
1276 respond_string("\033[0n", tty
); /* Terminal ok */
1279 static inline void respond_ID(struct tty_struct
* tty
)
1281 respond_string(VT102ID
, tty
);
1284 void mouse_report(struct tty_struct
*tty
, int butt
, int mrx
, int mry
)
1288 sprintf(buf
, "\033[M%c%c%c", (char)(' ' + butt
), (char)('!' + mrx
),
1290 respond_string(buf
, tty
);
1293 /* invoked via ioctl(TIOCLINUX) and through set_selection */
1294 int mouse_reporting(void)
1296 return vc_cons
[fg_console
].d
->vc_report_mouse
;
1299 /* console_sem is held */
1300 static void set_mode(struct vc_data
*vc
, int on_off
)
1304 for (i
= 0; i
<= vc
->vc_npar
; i
++)
1306 switch(vc
->vc_par
[i
]) { /* DEC private modes set/reset */
1307 case 1: /* Cursor keys send ^[Ox/^[[x */
1309 set_kbd(vc
, decckm
);
1311 clr_kbd(vc
, decckm
);
1313 case 3: /* 80/132 mode switch unimplemented */
1314 vc
->vc_deccolm
= on_off
;
1316 vc_resize(deccolm
? 132 : 80, vc
->vc_rows
);
1317 /* this alone does not suffice; some user mode
1318 utility has to change the hardware regs */
1321 case 5: /* Inverted screen on/off */
1322 if (vc
->vc_decscnm
!= on_off
) {
1323 vc
->vc_decscnm
= on_off
;
1324 invert_screen(vc
, 0, vc
->vc_screenbuf_size
, 0);
1328 case 6: /* Origin relative/absolute */
1329 vc
->vc_decom
= on_off
;
1332 case 7: /* Autowrap on/off */
1333 vc
->vc_decawm
= on_off
;
1335 case 8: /* Autorepeat on/off */
1337 set_kbd(vc
, decarm
);
1339 clr_kbd(vc
, decarm
);
1342 vc
->vc_report_mouse
= on_off
? 1 : 0;
1344 case 25: /* Cursor on/off */
1345 vc
->vc_deccm
= on_off
;
1348 vc
->vc_report_mouse
= on_off
? 2 : 0;
1352 switch(vc
->vc_par
[i
]) { /* ANSI modes set/reset */
1353 case 3: /* Monitor (display ctrls) */
1354 vc
->vc_disp_ctrl
= on_off
;
1356 case 4: /* Insert Mode on/off */
1357 vc
->vc_decim
= on_off
;
1359 case 20: /* Lf, Enter == CrLf/Lf */
1369 /* console_sem is held */
1370 static void setterm_command(struct vc_data
*vc
)
1372 switch(vc
->vc_par
[0]) {
1373 case 1: /* set color for underline mode */
1374 if (vc
->vc_can_do_color
&&
1375 vc
->vc_par
[1] < 16) {
1376 vc
->vc_ulcolor
= color_table
[vc
->vc_par
[1]];
1377 if (vc
->vc_underline
)
1381 case 2: /* set color for half intensity mode */
1382 if (vc
->vc_can_do_color
&&
1383 vc
->vc_par
[1] < 16) {
1384 vc
->vc_halfcolor
= color_table
[vc
->vc_par
[1]];
1385 if (vc
->vc_intensity
== 0)
1389 case 8: /* store colors as defaults */
1390 vc
->vc_def_color
= vc
->vc_attr
;
1391 if (vc
->vc_hi_font_mask
== 0x100)
1392 vc
->vc_def_color
>>= 1;
1396 case 9: /* set blanking interval */
1397 blankinterval
= ((vc
->vc_par
[1] < 60) ? vc
->vc_par
[1] : 60) * 60 * HZ
;
1398 poke_blanked_console();
1400 case 10: /* set bell frequency in Hz */
1401 if (vc
->vc_npar
>= 1)
1402 vc
->vc_bell_pitch
= vc
->vc_par
[1];
1404 vc
->vc_bell_pitch
= DEFAULT_BELL_PITCH
;
1406 case 11: /* set bell duration in msec */
1407 if (vc
->vc_npar
>= 1)
1408 vc
->vc_bell_duration
= (vc
->vc_par
[1] < 2000) ?
1409 vc
->vc_par
[1] * HZ
/ 1000 : 0;
1411 vc
->vc_bell_duration
= DEFAULT_BELL_DURATION
;
1413 case 12: /* bring specified console to the front */
1414 if (vc
->vc_par
[1] >= 1 && vc_cons_allocated(vc
->vc_par
[1] - 1))
1415 set_console(vc
->vc_par
[1] - 1);
1417 case 13: /* unblank the screen */
1418 poke_blanked_console();
1420 case 14: /* set vesa powerdown interval */
1421 vesa_off_interval
= ((vc
->vc_par
[1] < 60) ? vc
->vc_par
[1] : 60) * 60 * HZ
;
1423 case 15: /* activate the previous console */
1424 set_console(last_console
);
1429 /* console_sem is held */
1430 static void csi_at(struct vc_data
*vc
, unsigned int nr
)
1432 if (nr
> vc
->vc_cols
- vc
->vc_x
)
1433 nr
= vc
->vc_cols
- vc
->vc_x
;
1436 insert_char(vc
, nr
);
1439 /* console_sem is held */
1440 static void csi_L(struct vc_data
*vc
, unsigned int nr
)
1442 if (nr
> vc
->vc_rows
- vc
->vc_y
)
1443 nr
= vc
->vc_rows
- vc
->vc_y
;
1446 scrdown(vc
, vc
->vc_y
, vc
->vc_bottom
, nr
);
1447 vc
->vc_need_wrap
= 0;
1450 /* console_sem is held */
1451 static void csi_P(struct vc_data
*vc
, unsigned int nr
)
1453 if (nr
> vc
->vc_cols
- vc
->vc_x
)
1454 nr
= vc
->vc_cols
- vc
->vc_x
;
1457 delete_char(vc
, nr
);
1460 /* console_sem is held */
1461 static void csi_M(struct vc_data
*vc
, unsigned int nr
)
1463 if (nr
> vc
->vc_rows
- vc
->vc_y
)
1464 nr
= vc
->vc_rows
- vc
->vc_y
;
1467 scrup(vc
, vc
->vc_y
, vc
->vc_bottom
, nr
);
1468 vc
->vc_need_wrap
= 0;
1471 /* console_sem is held (except via vc_init->reset_terminal */
1472 static void save_cur(struct vc_data
*vc
)
1474 vc
->vc_saved_x
= vc
->vc_x
;
1475 vc
->vc_saved_y
= vc
->vc_y
;
1476 vc
->vc_s_intensity
= vc
->vc_intensity
;
1477 vc
->vc_s_italic
= vc
->vc_italic
;
1478 vc
->vc_s_underline
= vc
->vc_underline
;
1479 vc
->vc_s_blink
= vc
->vc_blink
;
1480 vc
->vc_s_reverse
= vc
->vc_reverse
;
1481 vc
->vc_s_charset
= vc
->vc_charset
;
1482 vc
->vc_s_color
= vc
->vc_color
;
1483 vc
->vc_saved_G0
= vc
->vc_G0_charset
;
1484 vc
->vc_saved_G1
= vc
->vc_G1_charset
;
1487 /* console_sem is held */
1488 static void restore_cur(struct vc_data
*vc
)
1490 gotoxy(vc
, vc
->vc_saved_x
, vc
->vc_saved_y
);
1491 vc
->vc_intensity
= vc
->vc_s_intensity
;
1492 vc
->vc_italic
= vc
->vc_s_italic
;
1493 vc
->vc_underline
= vc
->vc_s_underline
;
1494 vc
->vc_blink
= vc
->vc_s_blink
;
1495 vc
->vc_reverse
= vc
->vc_s_reverse
;
1496 vc
->vc_charset
= vc
->vc_s_charset
;
1497 vc
->vc_color
= vc
->vc_s_color
;
1498 vc
->vc_G0_charset
= vc
->vc_saved_G0
;
1499 vc
->vc_G1_charset
= vc
->vc_saved_G1
;
1500 vc
->vc_translate
= set_translate(vc
->vc_charset
? vc
->vc_G1_charset
: vc
->vc_G0_charset
, vc
);
1502 vc
->vc_need_wrap
= 0;
1505 enum { ESnormal
, ESesc
, ESsquare
, ESgetpars
, ESgotpars
, ESfunckey
,
1506 EShash
, ESsetG0
, ESsetG1
, ESpercent
, ESignore
, ESnonstd
,
1509 /* console_sem is held (except via vc_init()) */
1510 static void reset_terminal(struct vc_data
*vc
, int do_clear
)
1513 vc
->vc_bottom
= vc
->vc_rows
;
1514 vc
->vc_state
= ESnormal
;
1516 vc
->vc_translate
= set_translate(LAT1_MAP
, vc
);
1517 vc
->vc_G0_charset
= LAT1_MAP
;
1518 vc
->vc_G1_charset
= GRAF_MAP
;
1520 vc
->vc_need_wrap
= 0;
1521 vc
->vc_report_mouse
= 0;
1522 vc
->vc_utf
= default_utf8
;
1523 vc
->vc_utf_count
= 0;
1525 vc
->vc_disp_ctrl
= 0;
1526 vc
->vc_toggle_meta
= 0;
1534 set_kbd(vc
, decarm
);
1535 clr_kbd(vc
, decckm
);
1536 clr_kbd(vc
, kbdapplic
);
1538 kbd_table
[vc
->vc_num
].lockstate
= 0;
1539 kbd_table
[vc
->vc_num
].slockstate
= 0;
1540 kbd_table
[vc
->vc_num
].ledmode
= LED_SHOW_FLAGS
;
1541 kbd_table
[vc
->vc_num
].ledflagstate
= kbd_table
[vc
->vc_num
].default_ledflagstate
;
1542 /* do not do set_leds here because this causes an endless tasklet loop
1543 when the keyboard hasn't been initialized yet */
1545 vc
->vc_cursor_type
= CUR_DEFAULT
;
1546 vc
->vc_complement_mask
= vc
->vc_s_complement_mask
;
1551 vc
->vc_tab_stop
[0] = 0x01010100;
1552 vc
->vc_tab_stop
[1] =
1553 vc
->vc_tab_stop
[2] =
1554 vc
->vc_tab_stop
[3] =
1555 vc
->vc_tab_stop
[4] = 0x01010101;
1557 vc
->vc_bell_pitch
= DEFAULT_BELL_PITCH
;
1558 vc
->vc_bell_duration
= DEFAULT_BELL_DURATION
;
1566 /* console_sem is held */
1567 static void do_con_trol(struct tty_struct
*tty
, struct vc_data
*vc
, int c
)
1570 * Control characters can be used in the _middle_
1571 * of an escape sequence.
1577 if (vc
->vc_bell_duration
)
1578 kd_mksound(vc
->vc_bell_pitch
, vc
->vc_bell_duration
);
1584 vc
->vc_pos
-= (vc
->vc_x
<< 1);
1585 while (vc
->vc_x
< vc
->vc_cols
- 1) {
1587 if (vc
->vc_tab_stop
[vc
->vc_x
>> 5] & (1 << (vc
->vc_x
& 31)))
1590 vc
->vc_pos
+= (vc
->vc_x
<< 1);
1592 case 10: case 11: case 12:
1594 if (!is_kbd(vc
, lnm
))
1601 vc
->vc_translate
= set_translate(vc
->vc_G1_charset
, vc
);
1602 vc
->vc_disp_ctrl
= 1;
1606 vc
->vc_translate
= set_translate(vc
->vc_G0_charset
, vc
);
1607 vc
->vc_disp_ctrl
= 0;
1610 vc
->vc_state
= ESnormal
;
1613 vc
->vc_state
= ESesc
;
1619 vc
->vc_state
= ESsquare
;
1622 switch(vc
->vc_state
) {
1624 vc
->vc_state
= ESnormal
;
1627 vc
->vc_state
= ESsquare
;
1630 vc
->vc_state
= ESnonstd
;
1633 vc
->vc_state
= ESpercent
;
1646 vc
->vc_tab_stop
[vc
->vc_x
>> 5] |= (1 << (vc
->vc_x
& 31));
1658 vc
->vc_state
= ESsetG0
;
1661 vc
->vc_state
= ESsetG1
;
1664 vc
->vc_state
= EShash
;
1667 reset_terminal(vc
, 1);
1669 case '>': /* Numeric keypad */
1670 clr_kbd(vc
, kbdapplic
);
1672 case '=': /* Appl. keypad */
1673 set_kbd(vc
, kbdapplic
);
1678 if (c
=='P') { /* palette escape sequence */
1679 for (vc
->vc_npar
= 0; vc
->vc_npar
< NPAR
; vc
->vc_npar
++)
1680 vc
->vc_par
[vc
->vc_npar
] = 0;
1682 vc
->vc_state
= ESpalette
;
1684 } else if (c
=='R') { /* reset palette */
1686 vc
->vc_state
= ESnormal
;
1688 vc
->vc_state
= ESnormal
;
1691 if ( (c
>='0'&&c
<='9') || (c
>='A'&&c
<='F') || (c
>='a'&&c
<='f') ) {
1692 vc
->vc_par
[vc
->vc_npar
++] = (c
> '9' ? (c
& 0xDF) - 'A' + 10 : c
- '0');
1693 if (vc
->vc_npar
== 7) {
1694 int i
= vc
->vc_par
[0] * 3, j
= 1;
1695 vc
->vc_palette
[i
] = 16 * vc
->vc_par
[j
++];
1696 vc
->vc_palette
[i
++] += vc
->vc_par
[j
++];
1697 vc
->vc_palette
[i
] = 16 * vc
->vc_par
[j
++];
1698 vc
->vc_palette
[i
++] += vc
->vc_par
[j
++];
1699 vc
->vc_palette
[i
] = 16 * vc
->vc_par
[j
++];
1700 vc
->vc_palette
[i
] += vc
->vc_par
[j
];
1702 vc
->vc_state
= ESnormal
;
1705 vc
->vc_state
= ESnormal
;
1708 for (vc
->vc_npar
= 0; vc
->vc_npar
< NPAR
; vc
->vc_npar
++)
1709 vc
->vc_par
[vc
->vc_npar
] = 0;
1711 vc
->vc_state
= ESgetpars
;
1712 if (c
== '[') { /* Function key */
1713 vc
->vc_state
=ESfunckey
;
1716 vc
->vc_ques
= (c
== '?');
1720 if (c
== ';' && vc
->vc_npar
< NPAR
- 1) {
1723 } else if (c
>='0' && c
<='9') {
1724 vc
->vc_par
[vc
->vc_npar
] *= 10;
1725 vc
->vc_par
[vc
->vc_npar
] += c
- '0';
1728 vc
->vc_state
= ESgotpars
;
1730 vc
->vc_state
= ESnormal
;
1741 vc
->vc_cursor_type
= vc
->vc_par
[0] | (vc
->vc_par
[1] << 8) | (vc
->vc_par
[2] << 16);
1743 vc
->vc_cursor_type
= CUR_DEFAULT
;
1751 vc
->vc_complement_mask
= vc
->vc_par
[0] << 8 | vc
->vc_par
[1];
1753 vc
->vc_complement_mask
= vc
->vc_s_complement_mask
;
1759 if (vc
->vc_par
[0] == 5)
1761 else if (vc
->vc_par
[0] == 6)
1762 cursor_report(vc
, tty
);
1774 gotoxy(vc
, vc
->vc_par
[0], vc
->vc_y
);
1779 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
- vc
->vc_par
[0]);
1784 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
+ vc
->vc_par
[0]);
1789 gotoxy(vc
, vc
->vc_x
+ vc
->vc_par
[0], vc
->vc_y
);
1794 gotoxy(vc
, vc
->vc_x
- vc
->vc_par
[0], vc
->vc_y
);
1799 gotoxy(vc
, 0, vc
->vc_y
+ vc
->vc_par
[0]);
1804 gotoxy(vc
, 0, vc
->vc_y
- vc
->vc_par
[0]);
1809 gotoxay(vc
, vc
->vc_x
,vc
->vc_par
[0]);
1816 gotoxay(vc
, vc
->vc_par
[1], vc
->vc_par
[0]);
1819 csi_J(vc
, vc
->vc_par
[0]);
1822 csi_K(vc
, vc
->vc_par
[0]);
1825 csi_L(vc
, vc
->vc_par
[0]);
1828 csi_M(vc
, vc
->vc_par
[0]);
1831 csi_P(vc
, vc
->vc_par
[0]);
1839 vc
->vc_tab_stop
[vc
->vc_x
>> 5] &= ~(1 << (vc
->vc_x
& 31));
1840 else if (vc
->vc_par
[0] == 3) {
1841 vc
->vc_tab_stop
[0] =
1842 vc
->vc_tab_stop
[1] =
1843 vc
->vc_tab_stop
[2] =
1844 vc
->vc_tab_stop
[3] =
1845 vc
->vc_tab_stop
[4] = 0;
1851 case 'q': /* DECLL - but only 3 leds */
1852 /* map 0,1,2,3 to 0,1,2,4 */
1853 if (vc
->vc_par
[0] < 4)
1854 setledstate(kbd_table
+ vc
->vc_num
,
1855 (vc
->vc_par
[0] < 3) ? vc
->vc_par
[0] : 4);
1861 vc
->vc_par
[1] = vc
->vc_rows
;
1862 /* Minimum allowed region is 2 lines */
1863 if (vc
->vc_par
[0] < vc
->vc_par
[1] &&
1864 vc
->vc_par
[1] <= vc
->vc_rows
) {
1865 vc
->vc_top
= vc
->vc_par
[0] - 1;
1866 vc
->vc_bottom
= vc
->vc_par
[1];
1877 csi_X(vc
, vc
->vc_par
[0]);
1880 csi_at(vc
, vc
->vc_par
[0]);
1882 case ']': /* setterm functions */
1883 setterm_command(vc
);
1888 vc
->vc_state
= ESnormal
;
1890 case '@': /* defined in ISO 2022 */
1893 case 'G': /* prelim official escape code */
1894 case '8': /* retained for compatibility */
1900 vc
->vc_state
= ESnormal
;
1903 vc
->vc_state
= ESnormal
;
1905 /* DEC screen alignment test. kludge :-) */
1906 vc
->vc_video_erase_char
=
1907 (vc
->vc_video_erase_char
& 0xff00) | 'E';
1909 vc
->vc_video_erase_char
=
1910 (vc
->vc_video_erase_char
& 0xff00) | ' ';
1911 do_update_region(vc
, vc
->vc_origin
, vc
->vc_screenbuf_size
/ 2);
1916 vc
->vc_G0_charset
= GRAF_MAP
;
1918 vc
->vc_G0_charset
= LAT1_MAP
;
1920 vc
->vc_G0_charset
= IBMPC_MAP
;
1922 vc
->vc_G0_charset
= USER_MAP
;
1923 if (vc
->vc_charset
== 0)
1924 vc
->vc_translate
= set_translate(vc
->vc_G0_charset
, vc
);
1925 vc
->vc_state
= ESnormal
;
1929 vc
->vc_G1_charset
= GRAF_MAP
;
1931 vc
->vc_G1_charset
= LAT1_MAP
;
1933 vc
->vc_G1_charset
= IBMPC_MAP
;
1935 vc
->vc_G1_charset
= USER_MAP
;
1936 if (vc
->vc_charset
== 1)
1937 vc
->vc_translate
= set_translate(vc
->vc_G1_charset
, vc
);
1938 vc
->vc_state
= ESnormal
;
1941 vc
->vc_state
= ESnormal
;
1945 /* This is a temporary buffer used to prepare a tty console write
1946 * so that we can easily avoid touching user space while holding the
1947 * console spinlock. It is allocated in con_init and is shared by
1948 * this code and the vc_screen read/write tty calls.
1950 * We have to allocate this statically in the kernel data section
1951 * since console_init (and thus con_init) are called before any
1952 * kernel memory allocation is available.
1954 char con_buf
[CON_BUF_SIZE
];
1955 DEFINE_MUTEX(con_buf_mtx
);
1957 /* is_double_width() is based on the wcwidth() implementation by
1958 * Markus Kuhn -- 2007-05-26 (Unicode 5.0)
1959 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
1966 static int bisearch(uint32_t ucs
, const struct interval
*table
, int max
)
1971 if (ucs
< table
[0].first
|| ucs
> table
[max
].last
)
1973 while (max
>= min
) {
1974 mid
= (min
+ max
) / 2;
1975 if (ucs
> table
[mid
].last
)
1977 else if (ucs
< table
[mid
].first
)
1985 static int is_double_width(uint32_t ucs
)
1987 static const struct interval double_width
[] = {
1988 { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E },
1989 { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF },
1990 { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 },
1991 { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD }
1993 return bisearch(ucs
, double_width
, ARRAY_SIZE(double_width
) - 1);
1996 /* acquires console_sem */
1997 static int do_con_write(struct tty_struct
*tty
, const unsigned char *buf
, int count
)
1999 #ifdef VT_BUF_VRAM_ONLY
2000 #define FLUSH do { } while(0);
2002 #define FLUSH if (draw_x >= 0) { \
2003 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
2008 int c
, tc
, ok
, n
= 0, draw_x
= -1;
2009 unsigned int currcons
;
2010 unsigned long draw_from
= 0, draw_to
= 0;
2012 unsigned char vc_attr
;
2016 u16 himask
, charmask
;
2017 const unsigned char *orig_buf
= NULL
;
2025 acquire_console_sem();
2026 vc
= tty
->driver_data
;
2028 printk(KERN_ERR
"vt: argh, driver_data is NULL !\n");
2029 release_console_sem();
2033 currcons
= vc
->vc_num
;
2034 if (!vc_cons_allocated(currcons
)) {
2035 /* could this happen? */
2036 static int error
= 0;
2039 printk("con_write: tty %d not allocated\n", currcons
+1);
2041 release_console_sem();
2044 release_console_sem();
2049 /* At this point 'buf' is guaranteed to be a kernel buffer
2050 * and therefore no access to userspace (and therefore sleeping)
2051 * will be needed. The con_buf_mtx serializes all tty based
2052 * console rendering and vcs write/read operations. We hold
2053 * the console spinlock during the entire write.
2056 acquire_console_sem();
2058 vc
= tty
->driver_data
;
2060 printk(KERN_ERR
"vt: argh, driver_data _became_ NULL !\n");
2061 release_console_sem();
2065 himask
= vc
->vc_hi_font_mask
;
2066 charmask
= himask
? 0x1ff : 0xff;
2068 /* undraw cursor first */
2072 while (!tty
->stopped
&& count
) {
2082 /* Do no translation at all in control states */
2083 if (vc
->vc_state
!= ESnormal
) {
2085 } else if (vc
->vc_utf
&& !vc
->vc_disp_ctrl
) {
2086 /* Combine UTF-8 into Unicode in vc_utf_char.
2087 * vc_utf_count is the number of continuation bytes still
2088 * expected to arrive.
2089 * vc_npar is the number of continuation bytes arrived so
2093 if ((c
& 0xc0) == 0x80) {
2094 /* Continuation byte received */
2095 static const uint32_t utf8_length_changes
[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff };
2096 if (vc
->vc_utf_count
) {
2097 vc
->vc_utf_char
= (vc
->vc_utf_char
<< 6) | (c
& 0x3f);
2099 if (--vc
->vc_utf_count
) {
2100 /* Still need some bytes */
2103 /* Got a whole character */
2104 c
= vc
->vc_utf_char
;
2105 /* Reject overlong sequences */
2106 if (c
<= utf8_length_changes
[vc
->vc_npar
- 1] ||
2107 c
> utf8_length_changes
[vc
->vc_npar
])
2110 /* Unexpected continuation byte */
2111 vc
->vc_utf_count
= 0;
2115 /* Single ASCII byte or first byte of a sequence received */
2116 if (vc
->vc_utf_count
) {
2117 /* Continuation byte expected */
2119 vc
->vc_utf_count
= 0;
2121 } else if (c
> 0x7f) {
2122 /* First byte of a multibyte sequence received */
2124 if ((c
& 0xe0) == 0xc0) {
2125 vc
->vc_utf_count
= 1;
2126 vc
->vc_utf_char
= (c
& 0x1f);
2127 } else if ((c
& 0xf0) == 0xe0) {
2128 vc
->vc_utf_count
= 2;
2129 vc
->vc_utf_char
= (c
& 0x0f);
2130 } else if ((c
& 0xf8) == 0xf0) {
2131 vc
->vc_utf_count
= 3;
2132 vc
->vc_utf_char
= (c
& 0x07);
2133 } else if ((c
& 0xfc) == 0xf8) {
2134 vc
->vc_utf_count
= 4;
2135 vc
->vc_utf_char
= (c
& 0x03);
2136 } else if ((c
& 0xfe) == 0xfc) {
2137 vc
->vc_utf_count
= 5;
2138 vc
->vc_utf_char
= (c
& 0x01);
2140 /* 254 and 255 are invalid */
2143 if (vc
->vc_utf_count
) {
2144 /* Still need some bytes */
2148 /* Nothing to do if an ASCII byte was received */
2150 /* End of UTF-8 decoding. */
2151 /* c is the received character, or U+FFFD for invalid sequences. */
2152 /* Replace invalid Unicode code points with U+FFFD too */
2153 if ((c
>= 0xd800 && c
<= 0xdfff) || c
== 0xfffe || c
== 0xffff)
2156 } else { /* no utf or alternate charset mode */
2157 tc
= vc
->vc_translate
[vc
->vc_toggle_meta
? (c
| 0x80) : c
];
2160 /* If the original code was a control character we
2161 * only allow a glyph to be displayed if the code is
2162 * not normally used (such as for cursor movement) or
2163 * if the disp_ctrl mode has been explicitly enabled.
2164 * Certain characters (as given by the CTRL_ALWAYS
2165 * bitmap) are always displayed as control characters,
2166 * as the console would be pretty useless without
2167 * them; to display an arbitrary font position use the
2168 * direct-to-font zone in UTF-8 mode.
2170 ok
= tc
&& (c
>= 32 ||
2171 !(vc
->vc_disp_ctrl
? (CTRL_ALWAYS
>> c
) & 1 :
2172 vc
->vc_utf
|| ((CTRL_ACTION
>> c
) & 1)))
2173 && (c
!= 127 || vc
->vc_disp_ctrl
)
2176 if (vc
->vc_state
== ESnormal
&& ok
) {
2177 if (vc
->vc_utf
&& !vc
->vc_disp_ctrl
) {
2178 if (is_double_width(c
))
2181 /* Now try to find out how to display it */
2182 tc
= conv_uni_to_pc(vc
, tc
);
2183 if (tc
& ~charmask
) {
2184 if (tc
== -1 || tc
== -2) {
2185 continue; /* nothing to display */
2187 /* Glyph not found */
2188 if ((!(vc
->vc_utf
&& !vc
->vc_disp_ctrl
) || c
< 128) && !(c
& ~charmask
)) {
2189 /* In legacy mode use the glyph we get by a 1:1 mapping.
2190 This would make absolutely no sense with Unicode in mind,
2191 but do this for ASCII characters since a font may lack
2192 Unicode mapping info and we don't want to end up with
2193 having question marks only. */
2196 /* Display U+FFFD. If it's not found, display an inverse question mark. */
2197 tc
= conv_uni_to_pc(vc
, 0xfffd);
2200 tc
= conv_uni_to_pc(vc
, '?');
2201 if (tc
< 0) tc
= '?';
2207 vc_attr
= vc
->vc_attr
;
2209 /* invert vc_attr */
2210 if (!vc
->vc_can_do_color
) {
2211 vc_attr
= (vc
->vc_attr
) ^ 0x08;
2212 } else if (vc
->vc_hi_font_mask
== 0x100) {
2213 vc_attr
= ((vc
->vc_attr
) & 0x11) | (((vc
->vc_attr
) & 0xe0) >> 4) | (((vc
->vc_attr
) & 0x0e) << 4);
2215 vc_attr
= ((vc
->vc_attr
) & 0x88) | (((vc
->vc_attr
) & 0x70) >> 4) | (((vc
->vc_attr
) & 0x07) << 4);
2221 if (vc
->vc_need_wrap
|| vc
->vc_decim
)
2223 if (vc
->vc_need_wrap
) {
2230 ((vc_attr
<< 8) & ~himask
) + ((tc
& 0x100) ? himask
: 0) + (tc
& 0xff) :
2231 (vc_attr
<< 8) + tc
,
2232 (u16
*) vc
->vc_pos
);
2233 if (DO_UPDATE(vc
) && draw_x
< 0) {
2235 draw_from
= vc
->vc_pos
;
2237 if (vc
->vc_x
== vc
->vc_cols
- 1) {
2238 vc
->vc_need_wrap
= vc
->vc_decawm
;
2239 draw_to
= vc
->vc_pos
+ 2;
2242 draw_to
= (vc
->vc_pos
+= 2);
2245 if (!--width
) break;
2247 tc
= conv_uni_to_pc(vc
, ' '); /* A space is printed in the second column */
2248 if (tc
< 0) tc
= ' ';
2260 goto rescan_last_byte
;
2265 do_con_trol(tty
, vc
, orig
);
2268 console_conditional_schedule();
2269 release_console_sem();
2277 * This is the console switching callback.
2279 * Doing console switching in a process context allows
2280 * us to do the switches asynchronously (needed when we want
2281 * to switch due to a keyboard interrupt). Synchronization
2282 * with other console code and prevention of re-entrancy is
2283 * ensured with console_sem.
2285 static void console_callback(struct work_struct
*ignored
)
2287 acquire_console_sem();
2289 if (want_console
>= 0) {
2290 if (want_console
!= fg_console
&&
2291 vc_cons_allocated(want_console
)) {
2292 hide_cursor(vc_cons
[fg_console
].d
);
2293 change_console(vc_cons
[want_console
].d
);
2294 /* we only changed when the console had already
2295 been allocated - a new console is not created
2296 in an interrupt routine */
2300 if (do_poke_blanked_console
) { /* do not unblank for a LED change */
2301 do_poke_blanked_console
= 0;
2302 poke_blanked_console();
2304 if (scrollback_delta
) {
2305 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
2307 if (vc
->vc_mode
== KD_TEXT
)
2308 vc
->vc_sw
->con_scrolldelta(vc
, scrollback_delta
);
2309 scrollback_delta
= 0;
2311 if (blank_timer_expired
) {
2313 blank_timer_expired
= 0;
2316 release_console_sem();
2319 int set_console(int nr
)
2321 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
2323 if (!vc_cons_allocated(nr
) || vt_dont_switch
||
2324 (vc
->vt_mode
.mode
== VT_AUTO
&& vc
->vc_mode
== KD_GRAPHICS
)) {
2327 * Console switch will fail in console_callback() or
2328 * change_console() so there is no point scheduling
2331 * Existing set_console() users don't check the return
2332 * value so this shouldn't break anything
2338 schedule_console_callback();
2343 struct tty_driver
*console_driver
;
2345 #ifdef CONFIG_VT_CONSOLE
2348 * Console on virtual terminal
2350 * The console must be locked when we get here.
2353 static void vt_console_print(struct console
*co
, const char *b
, unsigned count
)
2355 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
2357 static unsigned long printing
;
2358 const ushort
*start
;
2362 /* console busy or not yet initialized */
2363 if (!printable
|| test_and_set_bit(0, &printing
))
2366 if (kmsg_redirect
&& vc_cons_allocated(kmsg_redirect
- 1))
2367 vc
= vc_cons
[kmsg_redirect
- 1].d
;
2369 /* read `x' only after setting currcons properly (otherwise
2370 the `x' macro will read the x of the foreground console). */
2373 if (!vc_cons_allocated(fg_console
)) {
2375 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2379 if (vc
->vc_mode
!= KD_TEXT
)
2382 /* undraw cursor first */
2386 start
= (ushort
*)vc
->vc_pos
;
2388 /* Contrived structure to try to emulate original need_wrap behaviour
2389 * Problems caused when we have need_wrap set on '\n' character */
2392 if (c
== 10 || c
== 13 || c
== 8 || vc
->vc_need_wrap
) {
2394 if (CON_IS_VISIBLE(vc
))
2395 vc
->vc_sw
->con_putcs(vc
, start
, cnt
, vc
->vc_y
, vc
->vc_x
);
2397 if (vc
->vc_need_wrap
)
2401 if (c
== 8) { /* backspace */
2403 start
= (ushort
*)vc
->vc_pos
;
2410 start
= (ushort
*)vc
->vc_pos
;
2412 if (c
== 10 || c
== 13)
2415 scr_writew((vc
->vc_attr
<< 8) + c
, (unsigned short *)vc
->vc_pos
);
2417 if (myx
== vc
->vc_cols
- 1) {
2418 vc
->vc_need_wrap
= 1;
2425 if (CON_IS_VISIBLE(vc
))
2426 vc
->vc_sw
->con_putcs(vc
, start
, cnt
, vc
->vc_y
, vc
->vc_x
);
2428 if (vc
->vc_x
== vc
->vc_cols
) {
2430 vc
->vc_need_wrap
= 1;
2436 clear_bit(0, &printing
);
2439 static struct tty_driver
*vt_console_device(struct console
*c
, int *index
)
2441 *index
= c
->index
? c
->index
-1 : fg_console
;
2442 return console_driver
;
2445 static struct console vt_console_driver
= {
2447 .write
= vt_console_print
,
2448 .device
= vt_console_device
,
2449 .unblank
= unblank_screen
,
2450 .flags
= CON_PRINTBUFFER
,
2456 * Handling of Linux-specific VC ioctls
2460 * Generally a bit racy with respect to console_sem().
2462 * There are some functions which don't need it.
2464 * There are some functions which can sleep for arbitrary periods
2465 * (paste_selection) but we don't need the lock there anyway.
2467 * set_selection has locking, and definitely needs it
2470 int tioclinux(struct tty_struct
*tty
, unsigned long arg
)
2473 char __user
*p
= (char __user
*)arg
;
2477 if (tty
->driver
->type
!= TTY_DRIVER_TYPE_CONSOLE
)
2479 if (current
->signal
->tty
!= tty
&& !capable(CAP_SYS_ADMIN
))
2481 if (get_user(type
, p
))
2487 acquire_console_sem();
2488 ret
= set_selection((struct tiocl_selection __user
*)(p
+1), tty
);
2489 release_console_sem();
2491 case TIOCL_PASTESEL
:
2492 ret
= paste_selection(tty
);
2494 case TIOCL_UNBLANKSCREEN
:
2495 acquire_console_sem();
2497 release_console_sem();
2499 case TIOCL_SELLOADLUT
:
2500 ret
= sel_loadlut(p
);
2502 case TIOCL_GETSHIFTSTATE
:
2505 * Make it possible to react to Shift+Mousebutton.
2506 * Note that 'shift_state' is an undocumented
2507 * kernel-internal variable; programs not closely
2508 * related to the kernel should not use this.
2511 ret
= __put_user(data
, p
);
2513 case TIOCL_GETMOUSEREPORTING
:
2514 data
= mouse_reporting();
2515 ret
= __put_user(data
, p
);
2517 case TIOCL_SETVESABLANK
:
2518 ret
= set_vesa_blanking(p
);
2520 case TIOCL_GETKMSGREDIRECT
:
2521 data
= kmsg_redirect
;
2522 ret
= __put_user(data
, p
);
2524 case TIOCL_SETKMSGREDIRECT
:
2525 if (!capable(CAP_SYS_ADMIN
)) {
2528 if (get_user(data
, p
+1))
2531 kmsg_redirect
= data
;
2534 case TIOCL_GETFGCONSOLE
:
2537 case TIOCL_SCROLLCONSOLE
:
2538 if (get_user(lines
, (s32 __user
*)(p
+4))) {
2541 scrollfront(vc_cons
[fg_console
].d
, lines
);
2545 case TIOCL_BLANKSCREEN
: /* until explicitly unblanked, not only poked */
2546 acquire_console_sem();
2549 release_console_sem();
2551 case TIOCL_BLANKEDSCREEN
:
2552 ret
= console_blanked
;
2562 * /dev/ttyN handling
2565 static int con_write(struct tty_struct
*tty
, const unsigned char *buf
, int count
)
2569 retval
= do_con_write(tty
, buf
, count
);
2570 con_flush_chars(tty
);
2575 static void con_put_char(struct tty_struct
*tty
, unsigned char ch
)
2578 return; /* n_r3964 calls put_char() from interrupt context */
2579 do_con_write(tty
, &ch
, 1);
2582 static int con_write_room(struct tty_struct
*tty
)
2586 return 4096; /* No limit, really; we're not buffering */
2589 static int con_chars_in_buffer(struct tty_struct
*tty
)
2591 return 0; /* we're not buffering */
2595 * con_throttle and con_unthrottle are only used for
2596 * paste_selection(), which has to stuff in a large number of
2599 static void con_throttle(struct tty_struct
*tty
)
2603 static void con_unthrottle(struct tty_struct
*tty
)
2605 struct vc_data
*vc
= tty
->driver_data
;
2607 wake_up_interruptible(&vc
->paste_wait
);
2611 * Turn the Scroll-Lock LED on when the tty is stopped
2613 static void con_stop(struct tty_struct
*tty
)
2618 console_num
= tty
->index
;
2619 if (!vc_cons_allocated(console_num
))
2621 set_vc_kbd_led(kbd_table
+ console_num
, VC_SCROLLOCK
);
2626 * Turn the Scroll-Lock LED off when the console is started
2628 static void con_start(struct tty_struct
*tty
)
2633 console_num
= tty
->index
;
2634 if (!vc_cons_allocated(console_num
))
2636 clr_vc_kbd_led(kbd_table
+ console_num
, VC_SCROLLOCK
);
2640 static void con_flush_chars(struct tty_struct
*tty
)
2644 if (in_interrupt()) /* from flush_to_ldisc */
2647 /* if we race with con_close(), vt may be null */
2648 acquire_console_sem();
2649 vc
= tty
->driver_data
;
2652 release_console_sem();
2656 * Allocate the console screen memory.
2658 static int con_open(struct tty_struct
*tty
, struct file
*filp
)
2660 unsigned int currcons
= tty
->index
;
2663 acquire_console_sem();
2664 if (tty
->driver_data
== NULL
) {
2665 ret
= vc_allocate(currcons
);
2667 struct vc_data
*vc
= vc_cons
[currcons
].d
;
2668 tty
->driver_data
= vc
;
2671 if (!tty
->winsize
.ws_row
&& !tty
->winsize
.ws_col
) {
2672 tty
->winsize
.ws_row
= vc_cons
[currcons
].d
->vc_rows
;
2673 tty
->winsize
.ws_col
= vc_cons
[currcons
].d
->vc_cols
;
2675 release_console_sem();
2676 vcs_make_sysfs(tty
);
2680 release_console_sem();
2685 * We take tty_mutex in here to prevent another thread from coming in via init_dev
2686 * and taking a ref against the tty while we're in the process of forgetting
2687 * about it and cleaning things up.
2689 * This is because vcs_remove_sysfs() can sleep and will drop the BKL.
2691 static void con_close(struct tty_struct
*tty
, struct file
*filp
)
2693 mutex_lock(&tty_mutex
);
2694 acquire_console_sem();
2695 if (tty
&& tty
->count
== 1) {
2696 struct vc_data
*vc
= tty
->driver_data
;
2700 tty
->driver_data
= NULL
;
2701 release_console_sem();
2702 vcs_remove_sysfs(tty
);
2703 mutex_unlock(&tty_mutex
);
2705 * tty_mutex is released, but we still hold BKL, so there is
2706 * still exclusion against init_dev()
2710 release_console_sem();
2711 mutex_unlock(&tty_mutex
);
2714 static int default_italic_color
= 2; // green (ASCII)
2715 static int default_underline_color
= 3; // cyan (ASCII)
2716 module_param_named(italic
, default_italic_color
, int, S_IRUGO
| S_IWUSR
);
2717 module_param_named(underline
, default_underline_color
, int, S_IRUGO
| S_IWUSR
);
2719 static void vc_init(struct vc_data
*vc
, unsigned int rows
,
2720 unsigned int cols
, int do_clear
)
2726 vc
->vc_size_row
= cols
<< 1;
2727 vc
->vc_screenbuf_size
= vc
->vc_rows
* vc
->vc_size_row
;
2730 vc
->vc_pos
= vc
->vc_origin
;
2732 for (j
=k
=0; j
<16; j
++) {
2733 vc
->vc_palette
[k
++] = default_red
[j
] ;
2734 vc
->vc_palette
[k
++] = default_grn
[j
] ;
2735 vc
->vc_palette
[k
++] = default_blu
[j
] ;
2737 vc
->vc_def_color
= 0x07; /* white */
2738 vc
->vc_ulcolor
= default_underline_color
;
2739 vc
->vc_itcolor
= default_italic_color
;
2740 vc
->vc_halfcolor
= 0x08; /* grey */
2741 init_waitqueue_head(&vc
->paste_wait
);
2742 reset_terminal(vc
, do_clear
);
2746 * This routine initializes console interrupts, and does nothing
2747 * else. If you want the screen to clear, call tty_write with
2748 * the appropriate escape-sequence.
2751 static int __init
con_init(void)
2753 const char *display_desc
= NULL
;
2755 unsigned int currcons
= 0, i
;
2757 acquire_console_sem();
2760 display_desc
= conswitchp
->con_startup();
2761 if (!display_desc
) {
2763 release_console_sem();
2767 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
2768 struct con_driver
*con_driver
= ®istered_con_driver
[i
];
2770 if (con_driver
->con
== NULL
) {
2771 con_driver
->con
= conswitchp
;
2772 con_driver
->desc
= display_desc
;
2773 con_driver
->flag
= CON_DRIVER_FLAG_INIT
;
2774 con_driver
->first
= 0;
2775 con_driver
->last
= MAX_NR_CONSOLES
- 1;
2780 for (i
= 0; i
< MAX_NR_CONSOLES
; i
++)
2781 con_driver_map
[i
] = conswitchp
;
2783 if (blankinterval
) {
2784 blank_state
= blank_normal_wait
;
2785 mod_timer(&console_timer
, jiffies
+ blankinterval
);
2789 * kmalloc is not running yet - we use the bootmem allocator.
2791 for (currcons
= 0; currcons
< MIN_NR_CONSOLES
; currcons
++) {
2792 vc_cons
[currcons
].d
= vc
= alloc_bootmem(sizeof(struct vc_data
));
2793 INIT_WORK(&vc_cons
[currcons
].SAK_work
, vc_SAK
);
2794 visual_init(vc
, currcons
, 1);
2795 vc
->vc_screenbuf
= (unsigned short *)alloc_bootmem(vc
->vc_screenbuf_size
);
2796 vc
->vc_kmalloced
= 0;
2797 vc_init(vc
, vc
->vc_rows
, vc
->vc_cols
,
2798 currcons
|| !vc
->vc_sw
->con_save_screen
);
2800 currcons
= fg_console
= 0;
2801 master_display_fg
= vc
= vc_cons
[currcons
].d
;
2804 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
);
2807 printk("Console: %s %s %dx%d",
2808 vc
->vc_can_do_color
? "colour" : "mono",
2809 display_desc
, vc
->vc_cols
, vc
->vc_rows
);
2813 release_console_sem();
2815 #ifdef CONFIG_VT_CONSOLE
2816 register_console(&vt_console_driver
);
2820 console_initcall(con_init
);
2822 static const struct tty_operations con_ops
= {
2826 .write_room
= con_write_room
,
2827 .put_char
= con_put_char
,
2828 .flush_chars
= con_flush_chars
,
2829 .chars_in_buffer
= con_chars_in_buffer
,
2833 .throttle
= con_throttle
,
2834 .unthrottle
= con_unthrottle
,
2837 int __init
vty_init(void)
2841 console_driver
= alloc_tty_driver(MAX_NR_CONSOLES
);
2842 if (!console_driver
)
2843 panic("Couldn't allocate console driver\n");
2844 console_driver
->owner
= THIS_MODULE
;
2845 console_driver
->name
= "tty";
2846 console_driver
->name_base
= 1;
2847 console_driver
->major
= TTY_MAJOR
;
2848 console_driver
->minor_start
= 1;
2849 console_driver
->type
= TTY_DRIVER_TYPE_CONSOLE
;
2850 console_driver
->init_termios
= tty_std_termios
;
2851 console_driver
->flags
= TTY_DRIVER_REAL_RAW
| TTY_DRIVER_RESET_TERMIOS
;
2852 tty_set_operations(console_driver
, &con_ops
);
2853 if (tty_register_driver(console_driver
))
2854 panic("Couldn't register console driver\n");
2858 #ifdef CONFIG_PROM_CONSOLE
2861 #ifdef CONFIG_MDA_CONSOLE
2867 #ifndef VT_SINGLE_DRIVER
2868 #include <linux/device.h>
2870 static struct class *vtconsole_class
;
2872 static int bind_con_driver(const struct consw
*csw
, int first
, int last
,
2875 struct module
*owner
= csw
->owner
;
2876 const char *desc
= NULL
;
2877 struct con_driver
*con_driver
;
2878 int i
, j
= -1, k
= -1, retval
= -ENODEV
;
2880 if (!try_module_get(owner
))
2883 acquire_console_sem();
2885 /* check if driver is registered */
2886 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
2887 con_driver
= ®istered_con_driver
[i
];
2889 if (con_driver
->con
== csw
) {
2890 desc
= con_driver
->desc
;
2899 if (!(con_driver
->flag
& CON_DRIVER_FLAG_INIT
)) {
2901 con_driver
->flag
|= CON_DRIVER_FLAG_INIT
;
2906 module_put(conswitchp
->owner
);
2908 __module_get(owner
);
2912 first
= max(first
, con_driver
->first
);
2913 last
= min(last
, con_driver
->last
);
2915 for (i
= first
; i
<= last
; i
++) {
2917 struct vc_data
*vc
= vc_cons
[i
].d
;
2919 if (con_driver_map
[i
])
2920 module_put(con_driver_map
[i
]->owner
);
2921 __module_get(owner
);
2922 con_driver_map
[i
] = csw
;
2924 if (!vc
|| !vc
->vc_sw
)
2929 if (CON_IS_VISIBLE(vc
)) {
2934 old_was_color
= vc
->vc_can_do_color
;
2935 vc
->vc_sw
->con_deinit(vc
);
2936 vc
->vc_origin
= (unsigned long)vc
->vc_screenbuf
;
2937 visual_init(vc
, i
, 0);
2941 /* If the console changed between mono <-> color, then
2942 * the attributes in the screenbuf will be wrong. The
2943 * following resets all attributes to something sane.
2945 if (old_was_color
!= vc
->vc_can_do_color
)
2946 clear_buffer_attributes(vc
);
2949 printk("Console: switching ");
2951 printk("consoles %d-%d ", first
+1, last
+1);
2953 struct vc_data
*vc
= vc_cons
[j
].d
;
2955 printk("to %s %s %dx%d\n",
2956 vc
->vc_can_do_color
? "colour" : "mono",
2957 desc
, vc
->vc_cols
, vc
->vc_rows
);
2964 printk("to %s\n", desc
);
2968 release_console_sem();
2973 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
2974 static int con_is_graphics(const struct consw
*csw
, int first
, int last
)
2978 for (i
= first
; i
<= last
; i
++) {
2979 struct vc_data
*vc
= vc_cons
[i
].d
;
2981 if (vc
&& vc
->vc_mode
== KD_GRAPHICS
) {
2990 static int unbind_con_driver(const struct consw
*csw
, int first
, int last
,
2993 struct module
*owner
= csw
->owner
;
2994 const struct consw
*defcsw
= NULL
;
2995 struct con_driver
*con_driver
= NULL
, *con_back
= NULL
;
2996 int i
, retval
= -ENODEV
;
2998 if (!try_module_get(owner
))
3001 acquire_console_sem();
3003 /* check if driver is registered and if it is unbindable */
3004 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3005 con_driver
= ®istered_con_driver
[i
];
3007 if (con_driver
->con
== csw
&&
3008 con_driver
->flag
& CON_DRIVER_FLAG_MODULE
) {
3015 release_console_sem();
3021 /* check if backup driver exists */
3022 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3023 con_back
= ®istered_con_driver
[i
];
3025 if (con_back
->con
&&
3026 !(con_back
->flag
& CON_DRIVER_FLAG_MODULE
)) {
3027 defcsw
= con_back
->con
;
3034 release_console_sem();
3038 if (!con_is_bound(csw
)) {
3039 release_console_sem();
3043 first
= max(first
, con_driver
->first
);
3044 last
= min(last
, con_driver
->last
);
3046 for (i
= first
; i
<= last
; i
++) {
3047 if (con_driver_map
[i
] == csw
) {
3048 module_put(csw
->owner
);
3049 con_driver_map
[i
] = NULL
;
3053 if (!con_is_bound(defcsw
)) {
3054 const struct consw
*defconsw
= conswitchp
;
3056 defcsw
->con_startup();
3057 con_back
->flag
|= CON_DRIVER_FLAG_INIT
;
3059 * vgacon may change the default driver to point
3060 * to dummycon, we restore it here...
3062 conswitchp
= defconsw
;
3065 if (!con_is_bound(csw
))
3066 con_driver
->flag
&= ~CON_DRIVER_FLAG_INIT
;
3068 release_console_sem();
3069 /* ignore return value, binding should not fail */
3070 bind_con_driver(defcsw
, first
, last
, deflt
);
3077 static int vt_bind(struct con_driver
*con
)
3079 const struct consw
*defcsw
= NULL
, *csw
= NULL
;
3080 int i
, more
= 1, first
= -1, last
= -1, deflt
= 0;
3082 if (!con
->con
|| !(con
->flag
& CON_DRIVER_FLAG_MODULE
) ||
3083 con_is_graphics(con
->con
, con
->first
, con
->last
))
3088 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3089 struct con_driver
*con
= ®istered_con_driver
[i
];
3091 if (con
->con
&& !(con
->flag
& CON_DRIVER_FLAG_MODULE
)) {
3103 for (i
= con
->first
; i
<= con
->last
; i
++) {
3104 if (con_driver_map
[i
] == defcsw
) {
3109 } else if (first
!= -1)
3113 if (first
== 0 && last
== MAX_NR_CONSOLES
-1)
3117 bind_con_driver(csw
, first
, last
, deflt
);
3128 static int vt_unbind(struct con_driver
*con
)
3130 const struct consw
*csw
= NULL
;
3131 int i
, more
= 1, first
= -1, last
= -1, deflt
= 0;
3133 if (!con
->con
|| !(con
->flag
& CON_DRIVER_FLAG_MODULE
) ||
3134 con_is_graphics(con
->con
, con
->first
, con
->last
))
3142 for (i
= con
->first
; i
<= con
->last
; i
++) {
3143 if (con_driver_map
[i
] == csw
) {
3148 } else if (first
!= -1)
3152 if (first
== 0 && last
== MAX_NR_CONSOLES
-1)
3156 unbind_con_driver(csw
, first
, last
, deflt
);
3167 static inline int vt_bind(struct con_driver
*con
)
3171 static inline int vt_unbind(struct con_driver
*con
)
3175 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3177 static ssize_t
store_bind(struct device
*dev
, struct device_attribute
*attr
,
3178 const char *buf
, size_t count
)
3180 struct con_driver
*con
= dev_get_drvdata(dev
);
3181 int bind
= simple_strtoul(buf
, NULL
, 0);
3191 static ssize_t
show_bind(struct device
*dev
, struct device_attribute
*attr
,
3194 struct con_driver
*con
= dev_get_drvdata(dev
);
3195 int bind
= con_is_bound(con
->con
);
3197 return snprintf(buf
, PAGE_SIZE
, "%i\n", bind
);
3200 static ssize_t
show_name(struct device
*dev
, struct device_attribute
*attr
,
3203 struct con_driver
*con
= dev_get_drvdata(dev
);
3205 return snprintf(buf
, PAGE_SIZE
, "%s %s\n",
3206 (con
->flag
& CON_DRIVER_FLAG_MODULE
) ? "(M)" : "(S)",
3211 static struct device_attribute device_attrs
[] = {
3212 __ATTR(bind
, S_IRUGO
|S_IWUSR
, show_bind
, store_bind
),
3213 __ATTR(name
, S_IRUGO
, show_name
, NULL
),
3216 static int vtconsole_init_device(struct con_driver
*con
)
3221 con
->flag
|= CON_DRIVER_FLAG_ATTR
;
3222 dev_set_drvdata(con
->dev
, con
);
3223 for (i
= 0; i
< ARRAY_SIZE(device_attrs
); i
++) {
3224 error
= device_create_file(con
->dev
, &device_attrs
[i
]);
3231 device_remove_file(con
->dev
, &device_attrs
[i
]);
3232 con
->flag
&= ~CON_DRIVER_FLAG_ATTR
;
3238 static void vtconsole_deinit_device(struct con_driver
*con
)
3242 if (con
->flag
& CON_DRIVER_FLAG_ATTR
) {
3243 for (i
= 0; i
< ARRAY_SIZE(device_attrs
); i
++)
3244 device_remove_file(con
->dev
, &device_attrs
[i
]);
3245 con
->flag
&= ~CON_DRIVER_FLAG_ATTR
;
3250 * con_is_bound - checks if driver is bound to the console
3251 * @csw: console driver
3253 * RETURNS: zero if unbound, nonzero if bound
3255 * Drivers can call this and if zero, they should release
3256 * all resources allocated on con_startup()
3258 int con_is_bound(const struct consw
*csw
)
3262 for (i
= 0; i
< MAX_NR_CONSOLES
; i
++) {
3263 if (con_driver_map
[i
] == csw
) {
3271 EXPORT_SYMBOL(con_is_bound
);
3274 * register_con_driver - register console driver to console layer
3275 * @csw: console driver
3276 * @first: the first console to take over, minimum value is 0
3277 * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1
3279 * DESCRIPTION: This function registers a console driver which can later
3280 * bind to a range of consoles specified by @first and @last. It will
3281 * also initialize the console driver by calling con_startup().
3283 int register_con_driver(const struct consw
*csw
, int first
, int last
)
3285 struct module
*owner
= csw
->owner
;
3286 struct con_driver
*con_driver
;
3290 if (!try_module_get(owner
))
3293 acquire_console_sem();
3295 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3296 con_driver
= ®istered_con_driver
[i
];
3298 /* already registered */
3299 if (con_driver
->con
== csw
)
3306 desc
= csw
->con_startup();
3313 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3314 con_driver
= ®istered_con_driver
[i
];
3316 if (con_driver
->con
== NULL
) {
3317 con_driver
->con
= csw
;
3318 con_driver
->desc
= desc
;
3319 con_driver
->node
= i
;
3320 con_driver
->flag
= CON_DRIVER_FLAG_MODULE
|
3321 CON_DRIVER_FLAG_INIT
;
3322 con_driver
->first
= first
;
3323 con_driver
->last
= last
;
3332 con_driver
->dev
= device_create(vtconsole_class
, NULL
,
3333 MKDEV(0, con_driver
->node
),
3334 "vtcon%i", con_driver
->node
);
3336 if (IS_ERR(con_driver
->dev
)) {
3337 printk(KERN_WARNING
"Unable to create device for %s; "
3338 "errno = %ld\n", con_driver
->desc
,
3339 PTR_ERR(con_driver
->dev
));
3340 con_driver
->dev
= NULL
;
3342 vtconsole_init_device(con_driver
);
3346 release_console_sem();
3350 EXPORT_SYMBOL(register_con_driver
);
3353 * unregister_con_driver - unregister console driver from console layer
3354 * @csw: console driver
3356 * DESCRIPTION: All drivers that registers to the console layer must
3357 * call this function upon exit, or if the console driver is in a state
3358 * where it won't be able to handle console services, such as the
3359 * framebuffer console without loaded framebuffer drivers.
3361 * The driver must unbind first prior to unregistration.
3363 int unregister_con_driver(const struct consw
*csw
)
3365 int i
, retval
= -ENODEV
;
3367 acquire_console_sem();
3369 /* cannot unregister a bound driver */
3370 if (con_is_bound(csw
))
3373 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3374 struct con_driver
*con_driver
= ®istered_con_driver
[i
];
3376 if (con_driver
->con
== csw
&&
3377 con_driver
->flag
& CON_DRIVER_FLAG_MODULE
) {
3378 vtconsole_deinit_device(con_driver
);
3379 device_destroy(vtconsole_class
,
3380 MKDEV(0, con_driver
->node
));
3381 con_driver
->con
= NULL
;
3382 con_driver
->desc
= NULL
;
3383 con_driver
->dev
= NULL
;
3384 con_driver
->node
= 0;
3385 con_driver
->flag
= 0;
3386 con_driver
->first
= 0;
3387 con_driver
->last
= 0;
3393 release_console_sem();
3396 EXPORT_SYMBOL(unregister_con_driver
);
3399 * If we support more console drivers, this function is used
3400 * when a driver wants to take over some existing consoles
3401 * and become default driver for newly opened ones.
3403 * take_over_console is basically a register followed by unbind
3405 int take_over_console(const struct consw
*csw
, int first
, int last
, int deflt
)
3409 err
= register_con_driver(csw
, first
, last
);
3412 bind_con_driver(csw
, first
, last
, deflt
);
3418 * give_up_console is a wrapper to unregister_con_driver. It will only
3419 * work if driver is fully unbound.
3421 void give_up_console(const struct consw
*csw
)
3423 unregister_con_driver(csw
);
3426 static int __init
vtconsole_class_init(void)
3430 vtconsole_class
= class_create(THIS_MODULE
, "vtconsole");
3431 if (IS_ERR(vtconsole_class
)) {
3432 printk(KERN_WARNING
"Unable to create vt console class; "
3433 "errno = %ld\n", PTR_ERR(vtconsole_class
));
3434 vtconsole_class
= NULL
;
3437 /* Add system drivers to sysfs */
3438 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3439 struct con_driver
*con
= ®istered_con_driver
[i
];
3441 if (con
->con
&& !con
->dev
) {
3442 con
->dev
= device_create(vtconsole_class
, NULL
,
3443 MKDEV(0, con
->node
),
3444 "vtcon%i", con
->node
);
3446 if (IS_ERR(con
->dev
)) {
3447 printk(KERN_WARNING
"Unable to create "
3448 "device for %s; errno = %ld\n",
3449 con
->desc
, PTR_ERR(con
->dev
));
3452 vtconsole_init_device(con
);
3459 postcore_initcall(vtconsole_class_init
);
3467 static int set_vesa_blanking(char __user
*p
)
3471 if (get_user(mode
, p
+ 1))
3474 vesa_blank_mode
= (mode
< 4) ? mode
: 0;
3478 void do_blank_screen(int entering_gfx
)
3480 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
3483 WARN_CONSOLE_UNLOCKED();
3485 if (console_blanked
) {
3486 if (blank_state
== blank_vesa_wait
) {
3487 blank_state
= blank_off
;
3488 vc
->vc_sw
->con_blank(vc
, vesa_blank_mode
+ 1, 0);
3492 if (blank_state
!= blank_normal_wait
)
3494 blank_state
= blank_off
;
3496 /* entering graphics mode? */
3500 vc
->vc_sw
->con_blank(vc
, -1, 1);
3501 console_blanked
= fg_console
+ 1;
3506 /* don't blank graphics */
3507 if (vc
->vc_mode
!= KD_TEXT
) {
3508 console_blanked
= fg_console
+ 1;
3513 del_timer_sync(&console_timer
);
3514 blank_timer_expired
= 0;
3517 /* In case we need to reset origin, blanking hook returns 1 */
3518 i
= vc
->vc_sw
->con_blank(vc
, vesa_off_interval
? 1 : (vesa_blank_mode
+ 1), 0);
3519 console_blanked
= fg_console
+ 1;
3523 if (console_blank_hook
&& console_blank_hook(1))
3526 if (vesa_off_interval
&& vesa_blank_mode
) {
3527 blank_state
= blank_vesa_wait
;
3528 mod_timer(&console_timer
, jiffies
+ vesa_off_interval
);
3531 EXPORT_SYMBOL(do_blank_screen
);
3534 * Called by timer as well as from vt_console_driver
3536 void do_unblank_screen(int leaving_gfx
)
3540 /* This should now always be called from a "sane" (read: can schedule)
3541 * context for the sake of the low level drivers, except in the special
3542 * case of oops_in_progress
3544 if (!oops_in_progress
)
3547 WARN_CONSOLE_UNLOCKED();
3550 if (!console_blanked
)
3552 if (!vc_cons_allocated(fg_console
)) {
3554 printk("unblank_screen: tty %d not allocated ??\n", fg_console
+1);
3557 vc
= vc_cons
[fg_console
].d
;
3558 if (vc
->vc_mode
!= KD_TEXT
)
3559 return; /* but leave console_blanked != 0 */
3561 if (blankinterval
) {
3562 mod_timer(&console_timer
, jiffies
+ blankinterval
);
3563 blank_state
= blank_normal_wait
;
3566 console_blanked
= 0;
3567 if (vc
->vc_sw
->con_blank(vc
, 0, leaving_gfx
))
3568 /* Low-level driver cannot restore -> do it ourselves */
3570 if (console_blank_hook
)
3571 console_blank_hook(0);
3575 EXPORT_SYMBOL(do_unblank_screen
);
3578 * This is called by the outside world to cause a forced unblank, mostly for
3579 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
3580 * call it with 1 as an argument and so force a mode restore... that may kill
3581 * X or at least garbage the screen but would also make the Oops visible...
3583 void unblank_screen(void)
3585 do_unblank_screen(0);
3589 * We defer the timer blanking to work queue so it can take the console mutex
3590 * (console operations can still happen at irq time, but only from printk which
3591 * has the console mutex. Not perfect yet, but better than no locking
3593 static void blank_screen_t(unsigned long dummy
)
3595 if (unlikely(!keventd_up())) {
3596 mod_timer(&console_timer
, jiffies
+ blankinterval
);
3599 blank_timer_expired
= 1;
3600 schedule_work(&console_work
);
3603 void poke_blanked_console(void)
3605 WARN_CONSOLE_UNLOCKED();
3607 /* Add this so we quickly catch whoever might call us in a non
3608 * safe context. Nowadays, unblank_screen() isn't to be called in
3609 * atomic contexts and is allowed to schedule (with the special case
3610 * of oops_in_progress, but that isn't of any concern for this
3615 /* This isn't perfectly race free, but a race here would be mostly harmless,
3616 * at worse, we'll do a spurrious blank and it's unlikely
3618 del_timer(&console_timer
);
3619 blank_timer_expired
= 0;
3621 if (ignore_poke
|| !vc_cons
[fg_console
].d
|| vc_cons
[fg_console
].d
->vc_mode
== KD_GRAPHICS
)
3623 if (console_blanked
)
3625 else if (blankinterval
) {
3626 mod_timer(&console_timer
, jiffies
+ blankinterval
);
3627 blank_state
= blank_normal_wait
;
3635 static void set_palette(struct vc_data
*vc
)
3637 WARN_CONSOLE_UNLOCKED();
3639 if (vc
->vc_mode
!= KD_GRAPHICS
)
3640 vc
->vc_sw
->con_set_palette(vc
, color_table
);
3643 static int set_get_cmap(unsigned char __user
*arg
, int set
)
3647 WARN_CONSOLE_UNLOCKED();
3649 for (i
= 0; i
< 16; i
++)
3651 get_user(default_red
[i
], arg
++);
3652 get_user(default_grn
[i
], arg
++);
3653 get_user(default_blu
[i
], arg
++);
3655 put_user(default_red
[i
], arg
++);
3656 put_user(default_grn
[i
], arg
++);
3657 put_user(default_blu
[i
], arg
++);
3660 for (i
= 0; i
< MAX_NR_CONSOLES
; i
++)
3661 if (vc_cons_allocated(i
)) {
3662 for (j
= k
= 0; j
< 16; j
++) {
3663 vc_cons
[i
].d
->vc_palette
[k
++] = default_red
[j
];
3664 vc_cons
[i
].d
->vc_palette
[k
++] = default_grn
[j
];
3665 vc_cons
[i
].d
->vc_palette
[k
++] = default_blu
[j
];
3667 set_palette(vc_cons
[i
].d
);
3674 * Load palette into the DAC registers. arg points to a colour
3675 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
3678 int con_set_cmap(unsigned char __user
*arg
)
3682 acquire_console_sem();
3683 rc
= set_get_cmap (arg
,1);
3684 release_console_sem();
3689 int con_get_cmap(unsigned char __user
*arg
)
3693 acquire_console_sem();
3694 rc
= set_get_cmap (arg
,0);
3695 release_console_sem();
3700 void reset_palette(struct vc_data
*vc
)
3703 for (j
=k
=0; j
<16; j
++) {
3704 vc
->vc_palette
[k
++] = default_red
[j
];
3705 vc
->vc_palette
[k
++] = default_grn
[j
];
3706 vc
->vc_palette
[k
++] = default_blu
[j
];
3714 * Currently we only support fonts up to 32 pixels wide, at a maximum height
3715 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
3716 * depending on width) reserved for each character which is kinda wasty, but
3717 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
3718 * is upto the actual low-level console-driver convert data into its favorite
3719 * format (maybe we should add a `fontoffset' field to the `display'
3720 * structure so we won't have to convert the fontdata all the time.
3724 #define max_font_size 65536
3726 static int con_font_get(struct vc_data
*vc
, struct console_font_op
*op
)
3728 struct console_font font
;
3732 if (vc
->vc_mode
!= KD_TEXT
)
3736 font
.data
= kmalloc(max_font_size
, GFP_KERNEL
);
3742 acquire_console_sem();
3743 if (vc
->vc_sw
->con_font_get
)
3744 rc
= vc
->vc_sw
->con_font_get(vc
, &font
);
3747 release_console_sem();
3752 c
= (font
.width
+7)/8 * 32 * font
.charcount
;
3754 if (op
->data
&& font
.charcount
> op
->charcount
)
3756 if (!(op
->flags
& KD_FONT_FLAG_OLD
)) {
3757 if (font
.width
> op
->width
|| font
.height
> op
->height
)
3760 if (font
.width
!= 8)
3762 else if ((op
->height
&& font
.height
> op
->height
) ||
3769 op
->height
= font
.height
;
3770 op
->width
= font
.width
;
3771 op
->charcount
= font
.charcount
;
3773 if (op
->data
&& copy_to_user(op
->data
, font
.data
, c
))
3781 static int con_font_set(struct vc_data
*vc
, struct console_font_op
*op
)
3783 struct console_font font
;
3787 if (vc
->vc_mode
!= KD_TEXT
)
3791 if (op
->charcount
> 512)
3793 if (!op
->height
) { /* Need to guess font height [compat] */
3795 u8 __user
*charmap
= op
->data
;
3798 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
3799 so that we can get rid of this soon */
3800 if (!(op
->flags
& KD_FONT_FLAG_OLD
))
3802 for (h
= 32; h
> 0; h
--)
3803 for (i
= 0; i
< op
->charcount
; i
++) {
3804 if (get_user(tmp
, &charmap
[32*i
+h
-1]))
3813 if (op
->width
<= 0 || op
->width
> 32 || op
->height
> 32)
3815 size
= (op
->width
+7)/8 * 32 * op
->charcount
;
3816 if (size
> max_font_size
)
3818 font
.charcount
= op
->charcount
;
3819 font
.height
= op
->height
;
3820 font
.width
= op
->width
;
3821 font
.data
= kmalloc(size
, GFP_KERNEL
);
3824 if (copy_from_user(font
.data
, op
->data
, size
)) {
3828 acquire_console_sem();
3829 if (vc
->vc_sw
->con_font_set
)
3830 rc
= vc
->vc_sw
->con_font_set(vc
, &font
, op
->flags
);
3833 release_console_sem();
3838 static int con_font_default(struct vc_data
*vc
, struct console_font_op
*op
)
3840 struct console_font font
= {.width
= op
->width
, .height
= op
->height
};
3841 char name
[MAX_FONT_NAME
];
3845 if (vc
->vc_mode
!= KD_TEXT
)
3850 else if (strncpy_from_user(name
, op
->data
, MAX_FONT_NAME
- 1) < 0)
3853 name
[MAX_FONT_NAME
- 1] = 0;
3855 acquire_console_sem();
3856 if (vc
->vc_sw
->con_font_default
)
3857 rc
= vc
->vc_sw
->con_font_default(vc
, &font
, s
);
3860 release_console_sem();
3862 op
->width
= font
.width
;
3863 op
->height
= font
.height
;
3868 static int con_font_copy(struct vc_data
*vc
, struct console_font_op
*op
)
3870 int con
= op
->height
;
3873 if (vc
->vc_mode
!= KD_TEXT
)
3876 acquire_console_sem();
3877 if (!vc
->vc_sw
->con_font_copy
)
3879 else if (con
< 0 || !vc_cons_allocated(con
))
3881 else if (con
== vc
->vc_num
) /* nothing to do */
3884 rc
= vc
->vc_sw
->con_font_copy(vc
, con
);
3885 release_console_sem();
3889 int con_font_op(struct vc_data
*vc
, struct console_font_op
*op
)
3892 case KD_FONT_OP_SET
:
3893 return con_font_set(vc
, op
);
3894 case KD_FONT_OP_GET
:
3895 return con_font_get(vc
, op
);
3896 case KD_FONT_OP_SET_DEFAULT
:
3897 return con_font_default(vc
, op
);
3898 case KD_FONT_OP_COPY
:
3899 return con_font_copy(vc
, op
);
3905 * Interface exported to selection and vcs.
3908 /* used by selection */
3909 u16
screen_glyph(struct vc_data
*vc
, int offset
)
3911 u16 w
= scr_readw(screenpos(vc
, offset
, 1));
3914 if (w
& vc
->vc_hi_font_mask
)
3919 /* used by vcs - note the word offset */
3920 unsigned short *screen_pos(struct vc_data
*vc
, int w_offset
, int viewed
)
3922 return screenpos(vc
, 2 * w_offset
, viewed
);
3925 void getconsxy(struct vc_data
*vc
, unsigned char *p
)
3931 void putconsxy(struct vc_data
*vc
, unsigned char *p
)
3934 gotoxy(vc
, p
[0], p
[1]);
3938 u16
vcs_scr_readw(struct vc_data
*vc
, const u16
*org
)
3940 if ((unsigned long)org
== vc
->vc_pos
&& softcursor_original
!= -1)
3941 return softcursor_original
;
3942 return scr_readw(org
);
3945 void vcs_scr_writew(struct vc_data
*vc
, u16 val
, u16
*org
)
3947 scr_writew(val
, org
);
3948 if ((unsigned long)org
== vc
->vc_pos
) {
3949 softcursor_original
= -1;
3955 * Visible symbols for modules
3958 EXPORT_SYMBOL(color_table
);
3959 EXPORT_SYMBOL(default_red
);
3960 EXPORT_SYMBOL(default_grn
);
3961 EXPORT_SYMBOL(default_blu
);
3962 EXPORT_SYMBOL(update_region
);
3963 EXPORT_SYMBOL(redraw_screen
);
3964 EXPORT_SYMBOL(vc_resize
);
3965 EXPORT_SYMBOL(vc_lock_resize
);
3966 EXPORT_SYMBOL(fg_console
);
3967 EXPORT_SYMBOL(console_blank_hook
);
3968 EXPORT_SYMBOL(console_blanked
);
3969 EXPORT_SYMBOL(vc_cons
);
3970 #ifndef VT_SINGLE_DRIVER
3971 EXPORT_SYMBOL(take_over_console
);
3972 EXPORT_SYMBOL(give_up_console
);