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
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>
99 #include <linux/font.h>
100 #include <linux/bitops.h>
101 #include <linux/notifier.h>
102 #include <linux/device.h>
103 #include <linux/io.h>
104 #include <asm/system.h>
105 #include <linux/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 int default_utf8
= true;
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 * Notifier list for console events.
228 static ATOMIC_NOTIFIER_HEAD(vt_notifier_list
);
230 int register_vt_notifier(struct notifier_block
*nb
)
232 return atomic_notifier_chain_register(&vt_notifier_list
, nb
);
234 EXPORT_SYMBOL_GPL(register_vt_notifier
);
236 int unregister_vt_notifier(struct notifier_block
*nb
)
238 return atomic_notifier_chain_unregister(&vt_notifier_list
, nb
);
240 EXPORT_SYMBOL_GPL(unregister_vt_notifier
);
242 static void notify_write(struct vc_data
*vc
, unsigned int unicode
)
244 struct vt_notifier_param param
= { .vc
= vc
, unicode
= unicode
};
245 atomic_notifier_call_chain(&vt_notifier_list
, VT_WRITE
, ¶m
);
248 static void notify_update(struct vc_data
*vc
)
250 struct vt_notifier_param param
= { .vc
= vc
};
251 atomic_notifier_call_chain(&vt_notifier_list
, VT_UPDATE
, ¶m
);
255 * Low-Level Functions
258 #define IS_FG(vc) ((vc)->vc_num == fg_console)
260 #ifdef VT_BUF_VRAM_ONLY
261 #define DO_UPDATE(vc) 0
263 #define DO_UPDATE(vc) (CON_IS_VISIBLE(vc) && !console_blanked)
266 static inline unsigned short *screenpos(struct vc_data
*vc
, int offset
, int viewed
)
271 p
= (unsigned short *)(vc
->vc_origin
+ offset
);
272 else if (!vc
->vc_sw
->con_screen_pos
)
273 p
= (unsigned short *)(vc
->vc_visible_origin
+ offset
);
275 p
= vc
->vc_sw
->con_screen_pos(vc
, offset
);
279 static inline void scrolldelta(int lines
)
281 scrollback_delta
+= lines
;
282 schedule_console_callback();
285 void schedule_console_callback(void)
287 schedule_work(&console_work
);
290 static void scrup(struct vc_data
*vc
, unsigned int t
, unsigned int b
, int nr
)
292 unsigned short *d
, *s
;
296 if (b
> vc
->vc_rows
|| t
>= b
|| nr
< 1)
298 if (CON_IS_VISIBLE(vc
) && vc
->vc_sw
->con_scroll(vc
, t
, b
, SM_UP
, nr
))
300 d
= (unsigned short *)(vc
->vc_origin
+ vc
->vc_size_row
* t
);
301 s
= (unsigned short *)(vc
->vc_origin
+ vc
->vc_size_row
* (t
+ nr
));
302 scr_memmovew(d
, s
, (b
- t
- nr
) * vc
->vc_size_row
);
303 scr_memsetw(d
+ (b
- t
- nr
) * vc
->vc_cols
, vc
->vc_video_erase_char
,
304 vc
->vc_size_row
* nr
);
307 static void scrdown(struct vc_data
*vc
, unsigned int t
, unsigned int b
, int nr
)
314 if (b
> vc
->vc_rows
|| t
>= b
|| nr
< 1)
316 if (CON_IS_VISIBLE(vc
) && vc
->vc_sw
->con_scroll(vc
, t
, b
, SM_DOWN
, nr
))
318 s
= (unsigned short *)(vc
->vc_origin
+ vc
->vc_size_row
* t
);
319 step
= vc
->vc_cols
* nr
;
320 scr_memmovew(s
+ step
, s
, (b
- t
- nr
) * vc
->vc_size_row
);
321 scr_memsetw(s
, vc
->vc_video_erase_char
, 2 * step
);
324 static void do_update_region(struct vc_data
*vc
, unsigned long start
, int count
)
326 #ifndef VT_BUF_VRAM_ONLY
327 unsigned int xx
, yy
, offset
;
331 if (!vc
->vc_sw
->con_getxy
) {
332 offset
= (start
- vc
->vc_origin
) / 2;
333 xx
= offset
% vc
->vc_cols
;
334 yy
= offset
/ vc
->vc_cols
;
337 start
= vc
->vc_sw
->con_getxy(vc
, start
, &nxx
, &nyy
);
341 u16 attrib
= scr_readw(p
) & 0xff00;
344 while (xx
< vc
->vc_cols
&& count
) {
345 if (attrib
!= (scr_readw(p
) & 0xff00)) {
347 vc
->vc_sw
->con_putcs(vc
, q
, p
-q
, yy
, startx
);
350 attrib
= scr_readw(p
) & 0xff00;
357 vc
->vc_sw
->con_putcs(vc
, q
, p
-q
, yy
, startx
);
362 if (vc
->vc_sw
->con_getxy
) {
364 start
= vc
->vc_sw
->con_getxy(vc
, start
, NULL
, NULL
);
370 void update_region(struct vc_data
*vc
, unsigned long start
, int count
)
372 WARN_CONSOLE_UNLOCKED();
376 do_update_region(vc
, start
, count
);
381 /* Structure of attributes is hardware-dependent */
383 static u8
build_attr(struct vc_data
*vc
, u8 _color
, u8 _intensity
, u8 _blink
,
384 u8 _underline
, u8 _reverse
, u8 _italic
)
386 if (vc
->vc_sw
->con_build_attr
)
387 return vc
->vc_sw
->con_build_attr(vc
, _color
, _intensity
,
388 _blink
, _underline
, _reverse
, _italic
);
390 #ifndef VT_BUF_VRAM_ONLY
392 * ++roman: I completely changed the attribute format for monochrome
393 * mode (!can_do_color). The formerly used MDA (monochrome display
394 * adapter) format didn't allow the combination of certain effects.
395 * Now the attribute is just a bit vector:
396 * Bit 0..1: intensity (0..2)
403 if (!vc
->vc_can_do_color
)
406 (_underline
? 4 : 0) |
410 a
= (a
& 0xF0) | vc
->vc_itcolor
;
412 a
= (a
& 0xf0) | vc
->vc_ulcolor
;
413 else if (_intensity
== 0)
414 a
= (a
& 0xf0) | vc
->vc_ulcolor
;
416 a
= ((a
) & 0x88) | ((((a
) >> 4) | ((a
) << 4)) & 0x77);
421 if (vc
->vc_hi_font_mask
== 0x100)
430 static void update_attr(struct vc_data
*vc
)
432 vc
->vc_attr
= build_attr(vc
, vc
->vc_color
, vc
->vc_intensity
,
433 vc
->vc_blink
, vc
->vc_underline
,
434 vc
->vc_reverse
^ vc
->vc_decscnm
, vc
->vc_italic
);
435 vc
->vc_video_erase_char
= (build_attr(vc
, vc
->vc_color
, 1, vc
->vc_blink
, 0, vc
->vc_decscnm
, 0) << 8) | ' ';
438 /* Note: inverting the screen twice should revert to the original state */
439 void invert_screen(struct vc_data
*vc
, int offset
, int count
, int viewed
)
443 WARN_CONSOLE_UNLOCKED();
446 p
= screenpos(vc
, offset
, viewed
);
447 if (vc
->vc_sw
->con_invert_region
)
448 vc
->vc_sw
->con_invert_region(vc
, p
, count
);
449 #ifndef VT_BUF_VRAM_ONLY
455 if (!vc
->vc_can_do_color
) {
462 } else if (vc
->vc_hi_font_mask
== 0x100) {
465 a
= ((a
) & 0x11ff) | (((a
) & 0xe000) >> 4) | (((a
) & 0x0e00) << 4);
472 a
= ((a
) & 0x88ff) | (((a
) & 0x7000) >> 4) | (((a
) & 0x0700) << 4);
480 do_update_region(vc
, (unsigned long) p
, count
);
483 /* used by selection: complement pointer position */
484 void complement_pos(struct vc_data
*vc
, int offset
)
486 static int old_offset
= -1;
487 static unsigned short old
;
488 static unsigned short oldx
, oldy
;
490 WARN_CONSOLE_UNLOCKED();
492 if (old_offset
!= -1 && old_offset
>= 0 &&
493 old_offset
< vc
->vc_screenbuf_size
) {
494 scr_writew(old
, screenpos(vc
, old_offset
, 1));
496 vc
->vc_sw
->con_putc(vc
, old
, oldy
, oldx
);
501 if (offset
!= -1 && offset
>= 0 &&
502 offset
< vc
->vc_screenbuf_size
) {
505 p
= screenpos(vc
, offset
, 1);
507 new = old
^ vc
->vc_complement_mask
;
510 oldx
= (offset
>> 1) % vc
->vc_cols
;
511 oldy
= (offset
>> 1) / vc
->vc_cols
;
512 vc
->vc_sw
->con_putc(vc
, new, oldy
, oldx
);
518 static void insert_char(struct vc_data
*vc
, unsigned int nr
)
520 unsigned short *p
, *q
= (unsigned short *)vc
->vc_pos
;
522 p
= q
+ vc
->vc_cols
- nr
- vc
->vc_x
;
524 scr_writew(scr_readw(p
), p
+ nr
);
525 scr_memsetw(q
, vc
->vc_video_erase_char
, nr
* 2);
526 vc
->vc_need_wrap
= 0;
528 unsigned short oldattr
= vc
->vc_attr
;
529 vc
->vc_sw
->con_bmove(vc
, vc
->vc_y
, vc
->vc_x
, vc
->vc_y
, vc
->vc_x
+ nr
, 1,
530 vc
->vc_cols
- vc
->vc_x
- nr
);
531 vc
->vc_attr
= vc
->vc_video_erase_char
>> 8;
533 vc
->vc_sw
->con_putc(vc
, vc
->vc_video_erase_char
, vc
->vc_y
, vc
->vc_x
+ nr
);
534 vc
->vc_attr
= oldattr
;
538 static void delete_char(struct vc_data
*vc
, unsigned int nr
)
540 unsigned int i
= vc
->vc_x
;
541 unsigned short *p
= (unsigned short *)vc
->vc_pos
;
543 while (++i
<= vc
->vc_cols
- nr
) {
544 scr_writew(scr_readw(p
+nr
), p
);
547 scr_memsetw(p
, vc
->vc_video_erase_char
, nr
* 2);
548 vc
->vc_need_wrap
= 0;
550 unsigned short oldattr
= vc
->vc_attr
;
551 vc
->vc_sw
->con_bmove(vc
, vc
->vc_y
, vc
->vc_x
+ nr
, vc
->vc_y
, vc
->vc_x
, 1,
552 vc
->vc_cols
- vc
->vc_x
- nr
);
553 vc
->vc_attr
= vc
->vc_video_erase_char
>> 8;
555 vc
->vc_sw
->con_putc(vc
, vc
->vc_video_erase_char
, vc
->vc_y
,
556 vc
->vc_cols
- 1 - nr
);
557 vc
->vc_attr
= oldattr
;
561 static int softcursor_original
;
563 static void add_softcursor(struct vc_data
*vc
)
565 int i
= scr_readw((u16
*) vc
->vc_pos
);
566 u32 type
= vc
->vc_cursor_type
;
568 if (! (type
& 0x10)) return;
569 if (softcursor_original
!= -1) return;
570 softcursor_original
= i
;
571 i
|= ((type
>> 8) & 0xff00 );
572 i
^= ((type
) & 0xff00 );
573 if ((type
& 0x20) && ((softcursor_original
& 0x7000) == (i
& 0x7000))) i
^= 0x7000;
574 if ((type
& 0x40) && ((i
& 0x700) == ((i
& 0x7000) >> 4))) i
^= 0x0700;
575 scr_writew(i
, (u16
*) vc
->vc_pos
);
577 vc
->vc_sw
->con_putc(vc
, i
, vc
->vc_y
, vc
->vc_x
);
580 static void hide_softcursor(struct vc_data
*vc
)
582 if (softcursor_original
!= -1) {
583 scr_writew(softcursor_original
, (u16
*)vc
->vc_pos
);
585 vc
->vc_sw
->con_putc(vc
, softcursor_original
,
587 softcursor_original
= -1;
591 static void hide_cursor(struct vc_data
*vc
)
595 vc
->vc_sw
->con_cursor(vc
, CM_ERASE
);
599 static void set_cursor(struct vc_data
*vc
)
601 if (!IS_FG(vc
) || console_blanked
||
602 vc
->vc_mode
== KD_GRAPHICS
)
608 if ((vc
->vc_cursor_type
& 0x0f) != 1)
609 vc
->vc_sw
->con_cursor(vc
, CM_DRAW
);
614 static void set_origin(struct vc_data
*vc
)
616 WARN_CONSOLE_UNLOCKED();
618 if (!CON_IS_VISIBLE(vc
) ||
619 !vc
->vc_sw
->con_set_origin
||
620 !vc
->vc_sw
->con_set_origin(vc
))
621 vc
->vc_origin
= (unsigned long)vc
->vc_screenbuf
;
622 vc
->vc_visible_origin
= vc
->vc_origin
;
623 vc
->vc_scr_end
= vc
->vc_origin
+ vc
->vc_screenbuf_size
;
624 vc
->vc_pos
= vc
->vc_origin
+ vc
->vc_size_row
* vc
->vc_y
+ 2 * vc
->vc_x
;
627 static inline void save_screen(struct vc_data
*vc
)
629 WARN_CONSOLE_UNLOCKED();
631 if (vc
->vc_sw
->con_save_screen
)
632 vc
->vc_sw
->con_save_screen(vc
);
636 * Redrawing of screen
639 static void clear_buffer_attributes(struct vc_data
*vc
)
641 unsigned short *p
= (unsigned short *)vc
->vc_origin
;
642 int count
= vc
->vc_screenbuf_size
/ 2;
643 int mask
= vc
->vc_hi_font_mask
| 0xff;
645 for (; count
> 0; count
--, p
++) {
646 scr_writew((scr_readw(p
)&mask
) | (vc
->vc_video_erase_char
& ~mask
), p
);
650 void redraw_screen(struct vc_data
*vc
, int is_switch
)
654 WARN_CONSOLE_UNLOCKED();
658 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
663 struct vc_data
*old_vc
= vc_cons
[fg_console
].d
;
666 if (!CON_IS_VISIBLE(vc
))
668 *vc
->vc_display_fg
= vc
;
669 fg_console
= vc
->vc_num
;
671 if (!CON_IS_VISIBLE(old_vc
)) {
682 int old_was_color
= vc
->vc_can_do_color
;
685 update
= vc
->vc_sw
->con_switch(vc
);
688 * If console changed from mono<->color, the best we can do
689 * is to clear the buffer attributes. As it currently stands,
690 * rebuilding new attributes from the old buffer is not doable
691 * without overly complex code.
693 if (old_was_color
!= vc
->vc_can_do_color
) {
695 clear_buffer_attributes(vc
);
697 if (update
&& vc
->vc_mode
!= KD_GRAPHICS
)
698 do_update_region(vc
, vc
->vc_origin
, vc
->vc_screenbuf_size
/ 2);
703 compute_shiftstate();
709 * Allocation, freeing and resizing of VTs.
712 int vc_cons_allocated(unsigned int i
)
714 return (i
< MAX_NR_CONSOLES
&& vc_cons
[i
].d
);
717 static void visual_init(struct vc_data
*vc
, int num
, int init
)
719 /* ++Geert: vc->vc_sw->con_init determines console size */
721 module_put(vc
->vc_sw
->owner
);
722 vc
->vc_sw
= conswitchp
;
723 #ifndef VT_SINGLE_DRIVER
724 if (con_driver_map
[num
])
725 vc
->vc_sw
= con_driver_map
[num
];
727 __module_get(vc
->vc_sw
->owner
);
729 vc
->vc_display_fg
= &master_display_fg
;
730 vc
->vc_uni_pagedir_loc
= &vc
->vc_uni_pagedir
;
731 vc
->vc_uni_pagedir
= 0;
732 vc
->vc_hi_font_mask
= 0;
733 vc
->vc_complement_mask
= 0;
734 vc
->vc_can_do_color
= 0;
735 vc
->vc_sw
->con_init(vc
, init
);
736 if (!vc
->vc_complement_mask
)
737 vc
->vc_complement_mask
= vc
->vc_can_do_color
? 0x7700 : 0x0800;
738 vc
->vc_s_complement_mask
= vc
->vc_complement_mask
;
739 vc
->vc_size_row
= vc
->vc_cols
<< 1;
740 vc
->vc_screenbuf_size
= vc
->vc_rows
* vc
->vc_size_row
;
743 int vc_allocate(unsigned int currcons
) /* return 0 on success */
745 WARN_CONSOLE_UNLOCKED();
747 if (currcons
>= MAX_NR_CONSOLES
)
749 if (!vc_cons
[currcons
].d
) {
751 struct vt_notifier_param param
;
753 /* prevent users from taking too much memory */
754 if (currcons
>= MAX_NR_USER_CONSOLES
&& !capable(CAP_SYS_RESOURCE
))
757 /* due to the granularity of kmalloc, we waste some memory here */
758 /* the alloc is done in two steps, to optimize the common situation
759 of a 25x80 console (structsize=216, screenbuf_size=4000) */
760 /* although the numbers above are not valid since long ago, the
761 point is still up-to-date and the comment still has its value
762 even if only as a historical artifact. --mj, July 1998 */
763 param
.vc
= vc
= kzalloc(sizeof(struct vc_data
), GFP_KERNEL
);
766 vc_cons
[currcons
].d
= vc
;
767 INIT_WORK(&vc_cons
[currcons
].SAK_work
, vc_SAK
);
768 visual_init(vc
, currcons
, 1);
769 if (!*vc
->vc_uni_pagedir_loc
)
770 con_set_default_unimap(vc
);
771 if (!vc
->vc_kmalloced
)
772 vc
->vc_screenbuf
= kmalloc(vc
->vc_screenbuf_size
, GFP_KERNEL
);
773 if (!vc
->vc_screenbuf
) {
775 vc_cons
[currcons
].d
= NULL
;
778 vc
->vc_kmalloced
= 1;
779 vc_init(vc
, vc
->vc_rows
, vc
->vc_cols
, 1);
780 vcs_make_sysfs(currcons
);
781 atomic_notifier_call_chain(&vt_notifier_list
, VT_ALLOCATE
, ¶m
);
786 static inline int resize_screen(struct vc_data
*vc
, int width
, int height
,
789 /* Resizes the resolution of the display adapater */
792 if (vc
->vc_mode
!= KD_GRAPHICS
&& vc
->vc_sw
->con_resize
)
793 err
= vc
->vc_sw
->con_resize(vc
, width
, height
, user
);
799 * Change # of rows and columns (0 means unchanged/the size of fg_console)
800 * [this is to be used together with some user program
801 * like resize that changes the hardware videomode]
803 #define VC_RESIZE_MAXCOL (32767)
804 #define VC_RESIZE_MAXROW (32767)
807 * vc_do_resize - resizing method for the tty
808 * @tty: tty being resized
809 * @real_tty: real tty (different to tty if a pty/tty pair)
810 * @vc: virtual console private data
814 * Resize a virtual console, clipping according to the actual constraints.
815 * If the caller passes a tty structure then update the termios winsize
816 * information and perform any neccessary signal handling.
818 * Caller must hold the console semaphore. Takes the termios mutex and
819 * ctrl_lock of the tty IFF a tty is passed.
822 static int vc_do_resize(struct tty_struct
*tty
, struct vc_data
*vc
,
823 unsigned int cols
, unsigned int lines
)
825 unsigned long old_origin
, new_origin
, new_scr_end
, rlth
, rrem
, err
= 0;
826 unsigned int old_cols
, old_rows
, old_row_size
, old_screen_size
;
827 unsigned int new_cols
, new_rows
, new_row_size
, new_screen_size
;
828 unsigned int end
, user
;
829 unsigned short *newscreen
;
831 WARN_CONSOLE_UNLOCKED();
836 user
= vc
->vc_resize_user
;
837 vc
->vc_resize_user
= 0;
839 if (cols
> VC_RESIZE_MAXCOL
|| lines
> VC_RESIZE_MAXROW
)
842 new_cols
= (cols
? cols
: vc
->vc_cols
);
843 new_rows
= (lines
? lines
: vc
->vc_rows
);
844 new_row_size
= new_cols
<< 1;
845 new_screen_size
= new_row_size
* new_rows
;
847 if (new_cols
== vc
->vc_cols
&& new_rows
== vc
->vc_rows
)
850 newscreen
= kmalloc(new_screen_size
, GFP_USER
);
854 old_rows
= vc
->vc_rows
;
855 old_cols
= vc
->vc_cols
;
856 old_row_size
= vc
->vc_size_row
;
857 old_screen_size
= vc
->vc_screenbuf_size
;
859 err
= resize_screen(vc
, new_cols
, new_rows
, user
);
865 vc
->vc_rows
= new_rows
;
866 vc
->vc_cols
= new_cols
;
867 vc
->vc_size_row
= new_row_size
;
868 vc
->vc_screenbuf_size
= new_screen_size
;
870 rlth
= min(old_row_size
, new_row_size
);
871 rrem
= new_row_size
- rlth
;
872 old_origin
= vc
->vc_origin
;
873 new_origin
= (long) newscreen
;
874 new_scr_end
= new_origin
+ new_screen_size
;
876 if (vc
->vc_y
> new_rows
) {
877 if (old_rows
- vc
->vc_y
< new_rows
) {
879 * Cursor near the bottom, copy contents from the
882 old_origin
+= (old_rows
- new_rows
) * old_row_size
;
883 end
= vc
->vc_scr_end
;
886 * Cursor is in no man's land, copy 1/2 screenful
887 * from the top and bottom of cursor position
889 old_origin
+= (vc
->vc_y
- new_rows
/2) * old_row_size
;
890 end
= old_origin
+ (old_row_size
* new_rows
);
894 * Cursor near the top, copy contents from the top of buffer
896 end
= (old_rows
> new_rows
) ? old_origin
+
897 (old_row_size
* new_rows
) :
902 while (old_origin
< end
) {
903 scr_memcpyw((unsigned short *) new_origin
,
904 (unsigned short *) old_origin
, rlth
);
906 scr_memsetw((void *)(new_origin
+ rlth
),
907 vc
->vc_video_erase_char
, rrem
);
908 old_origin
+= old_row_size
;
909 new_origin
+= new_row_size
;
911 if (new_scr_end
> new_origin
)
912 scr_memsetw((void *)new_origin
, vc
->vc_video_erase_char
,
913 new_scr_end
- new_origin
);
914 if (vc
->vc_kmalloced
)
915 kfree(vc
->vc_screenbuf
);
916 vc
->vc_screenbuf
= newscreen
;
917 vc
->vc_kmalloced
= 1;
918 vc
->vc_screenbuf_size
= new_screen_size
;
921 /* do part of a reset_terminal() */
923 vc
->vc_bottom
= vc
->vc_rows
;
924 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
);
928 /* Rewrite the requested winsize data with the actual
931 memset(&ws
, 0, sizeof(ws
));
932 ws
.ws_row
= vc
->vc_rows
;
933 ws
.ws_col
= vc
->vc_cols
;
934 ws
.ws_ypixel
= vc
->vc_scan_lines
;
935 tty_do_resize(tty
, &ws
);
938 if (CON_IS_VISIBLE(vc
))
944 * vc_resize - resize a VT
945 * @vc: virtual console
949 * Resize a virtual console as seen from the console end of things. We
950 * use the common vc_do_resize methods to update the structures. The
951 * caller must hold the console sem to protect console internals and
955 int vc_resize(struct vc_data
*vc
, unsigned int cols
, unsigned int rows
)
957 return vc_do_resize(vc
->vc_tty
, vc
, cols
, rows
);
961 * vt_resize - resize a VT
962 * @tty: tty to resize
963 * @ws: winsize attributes
965 * Resize a virtual terminal. This is called by the tty layer as we
966 * register our own handler for resizing. The mutual helper does all
969 * Takes the console sem and the called methods then take the tty
970 * termios_mutex and the tty ctrl_lock in that order.
972 static int vt_resize(struct tty_struct
*tty
, struct winsize
*ws
)
974 struct vc_data
*vc
= tty
->driver_data
;
977 acquire_console_sem();
978 ret
= vc_do_resize(tty
, vc
, ws
->ws_col
, ws
->ws_row
);
979 release_console_sem();
983 void vc_deallocate(unsigned int currcons
)
985 WARN_CONSOLE_UNLOCKED();
987 if (vc_cons_allocated(currcons
)) {
988 struct vc_data
*vc
= vc_cons
[currcons
].d
;
989 struct vt_notifier_param param
= { .vc
= vc
};
991 atomic_notifier_call_chain(&vt_notifier_list
, VT_DEALLOCATE
, ¶m
);
992 vcs_remove_sysfs(currcons
);
993 vc
->vc_sw
->con_deinit(vc
);
995 module_put(vc
->vc_sw
->owner
);
996 if (vc
->vc_kmalloced
)
997 kfree(vc
->vc_screenbuf
);
998 if (currcons
>= MIN_NR_CONSOLES
)
1000 vc_cons
[currcons
].d
= NULL
;
1008 #define set_kbd(vc, x) set_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1009 #define clr_kbd(vc, x) clr_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1010 #define is_kbd(vc, x) vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1012 #define decarm VC_REPEAT
1013 #define decckm VC_CKMODE
1014 #define kbdapplic VC_APPLIC
1018 * this is what the terminal answers to a ESC-Z or csi0c query.
1020 #define VT100ID "\033[?1;2c"
1021 #define VT102ID "\033[?6c"
1023 unsigned char color_table
[] = { 0, 4, 2, 6, 1, 5, 3, 7,
1024 8,12,10,14, 9,13,11,15 };
1026 /* the default colour table, for VGA+ colour systems */
1027 int default_red
[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
1028 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
1029 int default_grn
[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
1030 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
1031 int default_blu
[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
1032 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
1034 module_param_array(default_red
, int, NULL
, S_IRUGO
| S_IWUSR
);
1035 module_param_array(default_grn
, int, NULL
, S_IRUGO
| S_IWUSR
);
1036 module_param_array(default_blu
, int, NULL
, S_IRUGO
| S_IWUSR
);
1039 * gotoxy() must verify all boundaries, because the arguments
1040 * might also be negative. If the given position is out of
1041 * bounds, the cursor is placed at the nearest margin.
1043 static void gotoxy(struct vc_data
*vc
, int new_x
, int new_y
)
1050 if (new_x
>= vc
->vc_cols
)
1051 vc
->vc_x
= vc
->vc_cols
- 1;
1058 max_y
= vc
->vc_bottom
;
1061 max_y
= vc
->vc_rows
;
1065 else if (new_y
>= max_y
)
1066 vc
->vc_y
= max_y
- 1;
1069 vc
->vc_pos
= vc
->vc_origin
+ vc
->vc_y
* vc
->vc_size_row
+ (vc
->vc_x
<<1);
1070 vc
->vc_need_wrap
= 0;
1073 /* for absolute user moves, when decom is set */
1074 static void gotoxay(struct vc_data
*vc
, int new_x
, int new_y
)
1076 gotoxy(vc
, new_x
, vc
->vc_decom
? (vc
->vc_top
+ new_y
) : new_y
);
1079 void scrollback(struct vc_data
*vc
, int lines
)
1082 lines
= vc
->vc_rows
/ 2;
1083 scrolldelta(-lines
);
1086 void scrollfront(struct vc_data
*vc
, int lines
)
1089 lines
= vc
->vc_rows
/ 2;
1093 static void lf(struct vc_data
*vc
)
1095 /* don't scroll if above bottom of scrolling region, or
1096 * if below scrolling region
1098 if (vc
->vc_y
+ 1 == vc
->vc_bottom
)
1099 scrup(vc
, vc
->vc_top
, vc
->vc_bottom
, 1);
1100 else if (vc
->vc_y
< vc
->vc_rows
- 1) {
1102 vc
->vc_pos
+= vc
->vc_size_row
;
1104 vc
->vc_need_wrap
= 0;
1105 notify_write(vc
, '\n');
1108 static void ri(struct vc_data
*vc
)
1110 /* don't scroll if below top of scrolling region, or
1111 * if above scrolling region
1113 if (vc
->vc_y
== vc
->vc_top
)
1114 scrdown(vc
, vc
->vc_top
, vc
->vc_bottom
, 1);
1115 else if (vc
->vc_y
> 0) {
1117 vc
->vc_pos
-= vc
->vc_size_row
;
1119 vc
->vc_need_wrap
= 0;
1122 static inline void cr(struct vc_data
*vc
)
1124 vc
->vc_pos
-= vc
->vc_x
<< 1;
1125 vc
->vc_need_wrap
= vc
->vc_x
= 0;
1126 notify_write(vc
, '\r');
1129 static inline void bs(struct vc_data
*vc
)
1134 vc
->vc_need_wrap
= 0;
1135 notify_write(vc
, '\b');
1139 static inline void del(struct vc_data
*vc
)
1144 static void csi_J(struct vc_data
*vc
, int vpar
)
1147 unsigned short * start
;
1150 case 0: /* erase from cursor to end of display */
1151 count
= (vc
->vc_scr_end
- vc
->vc_pos
) >> 1;
1152 start
= (unsigned short *)vc
->vc_pos
;
1153 if (DO_UPDATE(vc
)) {
1154 /* do in two stages */
1155 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, vc
->vc_x
, 1,
1156 vc
->vc_cols
- vc
->vc_x
);
1157 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
+ 1, 0,
1158 vc
->vc_rows
- vc
->vc_y
- 1,
1162 case 1: /* erase from start to cursor */
1163 count
= ((vc
->vc_pos
- vc
->vc_origin
) >> 1) + 1;
1164 start
= (unsigned short *)vc
->vc_origin
;
1165 if (DO_UPDATE(vc
)) {
1166 /* do in two stages */
1167 vc
->vc_sw
->con_clear(vc
, 0, 0, vc
->vc_y
,
1169 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, 0, 1,
1173 case 2: /* erase whole display */
1174 count
= vc
->vc_cols
* vc
->vc_rows
;
1175 start
= (unsigned short *)vc
->vc_origin
;
1177 vc
->vc_sw
->con_clear(vc
, 0, 0,
1184 scr_memsetw(start
, vc
->vc_video_erase_char
, 2 * count
);
1185 vc
->vc_need_wrap
= 0;
1188 static void csi_K(struct vc_data
*vc
, int vpar
)
1191 unsigned short * start
;
1194 case 0: /* erase from cursor to end of line */
1195 count
= vc
->vc_cols
- vc
->vc_x
;
1196 start
= (unsigned short *)vc
->vc_pos
;
1198 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, vc
->vc_x
, 1,
1199 vc
->vc_cols
- vc
->vc_x
);
1201 case 1: /* erase from start of line to cursor */
1202 start
= (unsigned short *)(vc
->vc_pos
- (vc
->vc_x
<< 1));
1203 count
= vc
->vc_x
+ 1;
1205 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, 0, 1,
1208 case 2: /* erase whole line */
1209 start
= (unsigned short *)(vc
->vc_pos
- (vc
->vc_x
<< 1));
1210 count
= vc
->vc_cols
;
1212 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, 0, 1,
1218 scr_memsetw(start
, vc
->vc_video_erase_char
, 2 * count
);
1219 vc
->vc_need_wrap
= 0;
1222 static void csi_X(struct vc_data
*vc
, int vpar
) /* erase the following vpar positions */
1228 count
= (vpar
> vc
->vc_cols
- vc
->vc_x
) ? (vc
->vc_cols
- vc
->vc_x
) : vpar
;
1230 scr_memsetw((unsigned short *)vc
->vc_pos
, vc
->vc_video_erase_char
, 2 * count
);
1232 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, vc
->vc_x
, 1, count
);
1233 vc
->vc_need_wrap
= 0;
1236 static void default_attr(struct vc_data
*vc
)
1238 vc
->vc_intensity
= 1;
1240 vc
->vc_underline
= 0;
1243 vc
->vc_color
= vc
->vc_def_color
;
1246 /* console_sem is held */
1247 static void csi_m(struct vc_data
*vc
)
1251 for (i
= 0; i
<= vc
->vc_npar
; i
++)
1252 switch (vc
->vc_par
[i
]) {
1253 case 0: /* all attributes off */
1257 vc
->vc_intensity
= 2;
1260 vc
->vc_intensity
= 0;
1266 vc
->vc_underline
= 1;
1274 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1275 * Select primary font, don't display
1276 * control chars if defined, don't set
1279 vc
->vc_translate
= set_translate(vc
->vc_charset
== 0
1281 : vc
->vc_G1_charset
, vc
);
1282 vc
->vc_disp_ctrl
= 0;
1283 vc
->vc_toggle_meta
= 0;
1285 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1286 * Select first alternate font, lets
1287 * chars < 32 be displayed as ROM chars.
1289 vc
->vc_translate
= set_translate(IBMPC_MAP
, vc
);
1290 vc
->vc_disp_ctrl
= 1;
1291 vc
->vc_toggle_meta
= 0;
1293 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1294 * Select second alternate font, toggle
1295 * high bit before displaying as ROM char.
1297 vc
->vc_translate
= set_translate(IBMPC_MAP
, vc
);
1298 vc
->vc_disp_ctrl
= 1;
1299 vc
->vc_toggle_meta
= 1;
1303 vc
->vc_intensity
= 1;
1309 vc
->vc_underline
= 0;
1317 case 38: /* ANSI X3.64-1979 (SCO-ish?)
1318 * Enables underscore, white foreground
1319 * with white underscore (Linux - use
1320 * default foreground).
1322 vc
->vc_color
= (vc
->vc_def_color
& 0x0f) | (vc
->vc_color
& 0xf0);
1323 vc
->vc_underline
= 1;
1325 case 39: /* ANSI X3.64-1979 (SCO-ish?)
1326 * Disable underline option.
1327 * Reset colour to default? It did this
1330 vc
->vc_color
= (vc
->vc_def_color
& 0x0f) | (vc
->vc_color
& 0xf0);
1331 vc
->vc_underline
= 0;
1334 vc
->vc_color
= (vc
->vc_def_color
& 0xf0) | (vc
->vc_color
& 0x0f);
1337 if (vc
->vc_par
[i
] >= 30 && vc
->vc_par
[i
] <= 37)
1338 vc
->vc_color
= color_table
[vc
->vc_par
[i
] - 30]
1339 | (vc
->vc_color
& 0xf0);
1340 else if (vc
->vc_par
[i
] >= 40 && vc
->vc_par
[i
] <= 47)
1341 vc
->vc_color
= (color_table
[vc
->vc_par
[i
] - 40] << 4)
1342 | (vc
->vc_color
& 0x0f);
1348 static void respond_string(const char *p
, struct tty_struct
*tty
)
1351 tty_insert_flip_char(tty
, *p
, 0);
1354 con_schedule_flip(tty
);
1357 static void cursor_report(struct vc_data
*vc
, struct tty_struct
*tty
)
1361 sprintf(buf
, "\033[%d;%dR", vc
->vc_y
+ (vc
->vc_decom
? vc
->vc_top
+ 1 : 1), vc
->vc_x
+ 1);
1362 respond_string(buf
, tty
);
1365 static inline void status_report(struct tty_struct
*tty
)
1367 respond_string("\033[0n", tty
); /* Terminal ok */
1370 static inline void respond_ID(struct tty_struct
* tty
)
1372 respond_string(VT102ID
, tty
);
1375 void mouse_report(struct tty_struct
*tty
, int butt
, int mrx
, int mry
)
1379 sprintf(buf
, "\033[M%c%c%c", (char)(' ' + butt
), (char)('!' + mrx
),
1381 respond_string(buf
, tty
);
1384 /* invoked via ioctl(TIOCLINUX) and through set_selection */
1385 int mouse_reporting(void)
1387 return vc_cons
[fg_console
].d
->vc_report_mouse
;
1390 /* console_sem is held */
1391 static void set_mode(struct vc_data
*vc
, int on_off
)
1395 for (i
= 0; i
<= vc
->vc_npar
; i
++)
1397 switch(vc
->vc_par
[i
]) { /* DEC private modes set/reset */
1398 case 1: /* Cursor keys send ^[Ox/^[[x */
1400 set_kbd(vc
, decckm
);
1402 clr_kbd(vc
, decckm
);
1404 case 3: /* 80/132 mode switch unimplemented */
1405 vc
->vc_deccolm
= on_off
;
1407 vc_resize(deccolm
? 132 : 80, vc
->vc_rows
);
1408 /* this alone does not suffice; some user mode
1409 utility has to change the hardware regs */
1412 case 5: /* Inverted screen on/off */
1413 if (vc
->vc_decscnm
!= on_off
) {
1414 vc
->vc_decscnm
= on_off
;
1415 invert_screen(vc
, 0, vc
->vc_screenbuf_size
, 0);
1419 case 6: /* Origin relative/absolute */
1420 vc
->vc_decom
= on_off
;
1423 case 7: /* Autowrap on/off */
1424 vc
->vc_decawm
= on_off
;
1426 case 8: /* Autorepeat on/off */
1428 set_kbd(vc
, decarm
);
1430 clr_kbd(vc
, decarm
);
1433 vc
->vc_report_mouse
= on_off
? 1 : 0;
1435 case 25: /* Cursor on/off */
1436 vc
->vc_deccm
= on_off
;
1439 vc
->vc_report_mouse
= on_off
? 2 : 0;
1443 switch(vc
->vc_par
[i
]) { /* ANSI modes set/reset */
1444 case 3: /* Monitor (display ctrls) */
1445 vc
->vc_disp_ctrl
= on_off
;
1447 case 4: /* Insert Mode on/off */
1448 vc
->vc_decim
= on_off
;
1450 case 20: /* Lf, Enter == CrLf/Lf */
1460 /* console_sem is held */
1461 static void setterm_command(struct vc_data
*vc
)
1463 switch(vc
->vc_par
[0]) {
1464 case 1: /* set color for underline mode */
1465 if (vc
->vc_can_do_color
&&
1466 vc
->vc_par
[1] < 16) {
1467 vc
->vc_ulcolor
= color_table
[vc
->vc_par
[1]];
1468 if (vc
->vc_underline
)
1472 case 2: /* set color for half intensity mode */
1473 if (vc
->vc_can_do_color
&&
1474 vc
->vc_par
[1] < 16) {
1475 vc
->vc_halfcolor
= color_table
[vc
->vc_par
[1]];
1476 if (vc
->vc_intensity
== 0)
1480 case 8: /* store colors as defaults */
1481 vc
->vc_def_color
= vc
->vc_attr
;
1482 if (vc
->vc_hi_font_mask
== 0x100)
1483 vc
->vc_def_color
>>= 1;
1487 case 9: /* set blanking interval */
1488 blankinterval
= ((vc
->vc_par
[1] < 60) ? vc
->vc_par
[1] : 60) * 60 * HZ
;
1489 poke_blanked_console();
1491 case 10: /* set bell frequency in Hz */
1492 if (vc
->vc_npar
>= 1)
1493 vc
->vc_bell_pitch
= vc
->vc_par
[1];
1495 vc
->vc_bell_pitch
= DEFAULT_BELL_PITCH
;
1497 case 11: /* set bell duration in msec */
1498 if (vc
->vc_npar
>= 1)
1499 vc
->vc_bell_duration
= (vc
->vc_par
[1] < 2000) ?
1500 vc
->vc_par
[1] * HZ
/ 1000 : 0;
1502 vc
->vc_bell_duration
= DEFAULT_BELL_DURATION
;
1504 case 12: /* bring specified console to the front */
1505 if (vc
->vc_par
[1] >= 1 && vc_cons_allocated(vc
->vc_par
[1] - 1))
1506 set_console(vc
->vc_par
[1] - 1);
1508 case 13: /* unblank the screen */
1509 poke_blanked_console();
1511 case 14: /* set vesa powerdown interval */
1512 vesa_off_interval
= ((vc
->vc_par
[1] < 60) ? vc
->vc_par
[1] : 60) * 60 * HZ
;
1514 case 15: /* activate the previous console */
1515 set_console(last_console
);
1520 /* console_sem is held */
1521 static void csi_at(struct vc_data
*vc
, unsigned int nr
)
1523 if (nr
> vc
->vc_cols
- vc
->vc_x
)
1524 nr
= vc
->vc_cols
- vc
->vc_x
;
1527 insert_char(vc
, nr
);
1530 /* console_sem is held */
1531 static void csi_L(struct vc_data
*vc
, unsigned int nr
)
1533 if (nr
> vc
->vc_rows
- vc
->vc_y
)
1534 nr
= vc
->vc_rows
- vc
->vc_y
;
1537 scrdown(vc
, vc
->vc_y
, vc
->vc_bottom
, nr
);
1538 vc
->vc_need_wrap
= 0;
1541 /* console_sem is held */
1542 static void csi_P(struct vc_data
*vc
, unsigned int nr
)
1544 if (nr
> vc
->vc_cols
- vc
->vc_x
)
1545 nr
= vc
->vc_cols
- vc
->vc_x
;
1548 delete_char(vc
, nr
);
1551 /* console_sem is held */
1552 static void csi_M(struct vc_data
*vc
, unsigned int nr
)
1554 if (nr
> vc
->vc_rows
- vc
->vc_y
)
1555 nr
= vc
->vc_rows
- vc
->vc_y
;
1558 scrup(vc
, vc
->vc_y
, vc
->vc_bottom
, nr
);
1559 vc
->vc_need_wrap
= 0;
1562 /* console_sem is held (except via vc_init->reset_terminal */
1563 static void save_cur(struct vc_data
*vc
)
1565 vc
->vc_saved_x
= vc
->vc_x
;
1566 vc
->vc_saved_y
= vc
->vc_y
;
1567 vc
->vc_s_intensity
= vc
->vc_intensity
;
1568 vc
->vc_s_italic
= vc
->vc_italic
;
1569 vc
->vc_s_underline
= vc
->vc_underline
;
1570 vc
->vc_s_blink
= vc
->vc_blink
;
1571 vc
->vc_s_reverse
= vc
->vc_reverse
;
1572 vc
->vc_s_charset
= vc
->vc_charset
;
1573 vc
->vc_s_color
= vc
->vc_color
;
1574 vc
->vc_saved_G0
= vc
->vc_G0_charset
;
1575 vc
->vc_saved_G1
= vc
->vc_G1_charset
;
1578 /* console_sem is held */
1579 static void restore_cur(struct vc_data
*vc
)
1581 gotoxy(vc
, vc
->vc_saved_x
, vc
->vc_saved_y
);
1582 vc
->vc_intensity
= vc
->vc_s_intensity
;
1583 vc
->vc_italic
= vc
->vc_s_italic
;
1584 vc
->vc_underline
= vc
->vc_s_underline
;
1585 vc
->vc_blink
= vc
->vc_s_blink
;
1586 vc
->vc_reverse
= vc
->vc_s_reverse
;
1587 vc
->vc_charset
= vc
->vc_s_charset
;
1588 vc
->vc_color
= vc
->vc_s_color
;
1589 vc
->vc_G0_charset
= vc
->vc_saved_G0
;
1590 vc
->vc_G1_charset
= vc
->vc_saved_G1
;
1591 vc
->vc_translate
= set_translate(vc
->vc_charset
? vc
->vc_G1_charset
: vc
->vc_G0_charset
, vc
);
1593 vc
->vc_need_wrap
= 0;
1596 enum { ESnormal
, ESesc
, ESsquare
, ESgetpars
, ESgotpars
, ESfunckey
,
1597 EShash
, ESsetG0
, ESsetG1
, ESpercent
, ESignore
, ESnonstd
,
1600 /* console_sem is held (except via vc_init()) */
1601 static void reset_terminal(struct vc_data
*vc
, int do_clear
)
1604 vc
->vc_bottom
= vc
->vc_rows
;
1605 vc
->vc_state
= ESnormal
;
1607 vc
->vc_translate
= set_translate(LAT1_MAP
, vc
);
1608 vc
->vc_G0_charset
= LAT1_MAP
;
1609 vc
->vc_G1_charset
= GRAF_MAP
;
1611 vc
->vc_need_wrap
= 0;
1612 vc
->vc_report_mouse
= 0;
1613 vc
->vc_utf
= default_utf8
;
1614 vc
->vc_utf_count
= 0;
1616 vc
->vc_disp_ctrl
= 0;
1617 vc
->vc_toggle_meta
= 0;
1625 set_kbd(vc
, decarm
);
1626 clr_kbd(vc
, decckm
);
1627 clr_kbd(vc
, kbdapplic
);
1629 kbd_table
[vc
->vc_num
].lockstate
= 0;
1630 kbd_table
[vc
->vc_num
].slockstate
= 0;
1631 kbd_table
[vc
->vc_num
].ledmode
= LED_SHOW_FLAGS
;
1632 kbd_table
[vc
->vc_num
].ledflagstate
= kbd_table
[vc
->vc_num
].default_ledflagstate
;
1633 /* do not do set_leds here because this causes an endless tasklet loop
1634 when the keyboard hasn't been initialized yet */
1636 vc
->vc_cursor_type
= CUR_DEFAULT
;
1637 vc
->vc_complement_mask
= vc
->vc_s_complement_mask
;
1642 vc
->vc_tab_stop
[0] = 0x01010100;
1643 vc
->vc_tab_stop
[1] =
1644 vc
->vc_tab_stop
[2] =
1645 vc
->vc_tab_stop
[3] =
1646 vc
->vc_tab_stop
[4] =
1647 vc
->vc_tab_stop
[5] =
1648 vc
->vc_tab_stop
[6] =
1649 vc
->vc_tab_stop
[7] = 0x01010101;
1651 vc
->vc_bell_pitch
= DEFAULT_BELL_PITCH
;
1652 vc
->vc_bell_duration
= DEFAULT_BELL_DURATION
;
1660 /* console_sem is held */
1661 static void do_con_trol(struct tty_struct
*tty
, struct vc_data
*vc
, int c
)
1664 * Control characters can be used in the _middle_
1665 * of an escape sequence.
1671 if (vc
->vc_bell_duration
)
1672 kd_mksound(vc
->vc_bell_pitch
, vc
->vc_bell_duration
);
1678 vc
->vc_pos
-= (vc
->vc_x
<< 1);
1679 while (vc
->vc_x
< vc
->vc_cols
- 1) {
1681 if (vc
->vc_tab_stop
[vc
->vc_x
>> 5] & (1 << (vc
->vc_x
& 31)))
1684 vc
->vc_pos
+= (vc
->vc_x
<< 1);
1685 notify_write(vc
, '\t');
1687 case 10: case 11: case 12:
1689 if (!is_kbd(vc
, lnm
))
1696 vc
->vc_translate
= set_translate(vc
->vc_G1_charset
, vc
);
1697 vc
->vc_disp_ctrl
= 1;
1701 vc
->vc_translate
= set_translate(vc
->vc_G0_charset
, vc
);
1702 vc
->vc_disp_ctrl
= 0;
1705 vc
->vc_state
= ESnormal
;
1708 vc
->vc_state
= ESesc
;
1714 vc
->vc_state
= ESsquare
;
1717 switch(vc
->vc_state
) {
1719 vc
->vc_state
= ESnormal
;
1722 vc
->vc_state
= ESsquare
;
1725 vc
->vc_state
= ESnonstd
;
1728 vc
->vc_state
= ESpercent
;
1741 vc
->vc_tab_stop
[vc
->vc_x
>> 5] |= (1 << (vc
->vc_x
& 31));
1753 vc
->vc_state
= ESsetG0
;
1756 vc
->vc_state
= ESsetG1
;
1759 vc
->vc_state
= EShash
;
1762 reset_terminal(vc
, 1);
1764 case '>': /* Numeric keypad */
1765 clr_kbd(vc
, kbdapplic
);
1767 case '=': /* Appl. keypad */
1768 set_kbd(vc
, kbdapplic
);
1773 if (c
=='P') { /* palette escape sequence */
1774 for (vc
->vc_npar
= 0; vc
->vc_npar
< NPAR
; vc
->vc_npar
++)
1775 vc
->vc_par
[vc
->vc_npar
] = 0;
1777 vc
->vc_state
= ESpalette
;
1779 } else if (c
=='R') { /* reset palette */
1781 vc
->vc_state
= ESnormal
;
1783 vc
->vc_state
= ESnormal
;
1786 if ( (c
>='0'&&c
<='9') || (c
>='A'&&c
<='F') || (c
>='a'&&c
<='f') ) {
1787 vc
->vc_par
[vc
->vc_npar
++] = (c
> '9' ? (c
& 0xDF) - 'A' + 10 : c
- '0');
1788 if (vc
->vc_npar
== 7) {
1789 int i
= vc
->vc_par
[0] * 3, j
= 1;
1790 vc
->vc_palette
[i
] = 16 * vc
->vc_par
[j
++];
1791 vc
->vc_palette
[i
++] += vc
->vc_par
[j
++];
1792 vc
->vc_palette
[i
] = 16 * vc
->vc_par
[j
++];
1793 vc
->vc_palette
[i
++] += vc
->vc_par
[j
++];
1794 vc
->vc_palette
[i
] = 16 * vc
->vc_par
[j
++];
1795 vc
->vc_palette
[i
] += vc
->vc_par
[j
];
1797 vc
->vc_state
= ESnormal
;
1800 vc
->vc_state
= ESnormal
;
1803 for (vc
->vc_npar
= 0; vc
->vc_npar
< NPAR
; vc
->vc_npar
++)
1804 vc
->vc_par
[vc
->vc_npar
] = 0;
1806 vc
->vc_state
= ESgetpars
;
1807 if (c
== '[') { /* Function key */
1808 vc
->vc_state
=ESfunckey
;
1811 vc
->vc_ques
= (c
== '?');
1815 if (c
== ';' && vc
->vc_npar
< NPAR
- 1) {
1818 } else if (c
>='0' && c
<='9') {
1819 vc
->vc_par
[vc
->vc_npar
] *= 10;
1820 vc
->vc_par
[vc
->vc_npar
] += c
- '0';
1823 vc
->vc_state
= ESgotpars
;
1825 vc
->vc_state
= ESnormal
;
1836 vc
->vc_cursor_type
= vc
->vc_par
[0] | (vc
->vc_par
[1] << 8) | (vc
->vc_par
[2] << 16);
1838 vc
->vc_cursor_type
= CUR_DEFAULT
;
1846 vc
->vc_complement_mask
= vc
->vc_par
[0] << 8 | vc
->vc_par
[1];
1848 vc
->vc_complement_mask
= vc
->vc_s_complement_mask
;
1854 if (vc
->vc_par
[0] == 5)
1856 else if (vc
->vc_par
[0] == 6)
1857 cursor_report(vc
, tty
);
1869 gotoxy(vc
, vc
->vc_par
[0], vc
->vc_y
);
1874 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
- vc
->vc_par
[0]);
1879 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
+ vc
->vc_par
[0]);
1884 gotoxy(vc
, vc
->vc_x
+ vc
->vc_par
[0], vc
->vc_y
);
1889 gotoxy(vc
, vc
->vc_x
- vc
->vc_par
[0], vc
->vc_y
);
1894 gotoxy(vc
, 0, vc
->vc_y
+ vc
->vc_par
[0]);
1899 gotoxy(vc
, 0, vc
->vc_y
- vc
->vc_par
[0]);
1904 gotoxay(vc
, vc
->vc_x
,vc
->vc_par
[0]);
1911 gotoxay(vc
, vc
->vc_par
[1], vc
->vc_par
[0]);
1914 csi_J(vc
, vc
->vc_par
[0]);
1917 csi_K(vc
, vc
->vc_par
[0]);
1920 csi_L(vc
, vc
->vc_par
[0]);
1923 csi_M(vc
, vc
->vc_par
[0]);
1926 csi_P(vc
, vc
->vc_par
[0]);
1934 vc
->vc_tab_stop
[vc
->vc_x
>> 5] &= ~(1 << (vc
->vc_x
& 31));
1935 else if (vc
->vc_par
[0] == 3) {
1936 vc
->vc_tab_stop
[0] =
1937 vc
->vc_tab_stop
[1] =
1938 vc
->vc_tab_stop
[2] =
1939 vc
->vc_tab_stop
[3] =
1940 vc
->vc_tab_stop
[4] =
1941 vc
->vc_tab_stop
[5] =
1942 vc
->vc_tab_stop
[6] =
1943 vc
->vc_tab_stop
[7] = 0;
1949 case 'q': /* DECLL - but only 3 leds */
1950 /* map 0,1,2,3 to 0,1,2,4 */
1951 if (vc
->vc_par
[0] < 4)
1952 setledstate(kbd_table
+ vc
->vc_num
,
1953 (vc
->vc_par
[0] < 3) ? vc
->vc_par
[0] : 4);
1959 vc
->vc_par
[1] = vc
->vc_rows
;
1960 /* Minimum allowed region is 2 lines */
1961 if (vc
->vc_par
[0] < vc
->vc_par
[1] &&
1962 vc
->vc_par
[1] <= vc
->vc_rows
) {
1963 vc
->vc_top
= vc
->vc_par
[0] - 1;
1964 vc
->vc_bottom
= vc
->vc_par
[1];
1975 csi_X(vc
, vc
->vc_par
[0]);
1978 csi_at(vc
, vc
->vc_par
[0]);
1980 case ']': /* setterm functions */
1981 setterm_command(vc
);
1986 vc
->vc_state
= ESnormal
;
1988 case '@': /* defined in ISO 2022 */
1991 case 'G': /* prelim official escape code */
1992 case '8': /* retained for compatibility */
1998 vc
->vc_state
= ESnormal
;
2001 vc
->vc_state
= ESnormal
;
2003 /* DEC screen alignment test. kludge :-) */
2004 vc
->vc_video_erase_char
=
2005 (vc
->vc_video_erase_char
& 0xff00) | 'E';
2007 vc
->vc_video_erase_char
=
2008 (vc
->vc_video_erase_char
& 0xff00) | ' ';
2009 do_update_region(vc
, vc
->vc_origin
, vc
->vc_screenbuf_size
/ 2);
2014 vc
->vc_G0_charset
= GRAF_MAP
;
2016 vc
->vc_G0_charset
= LAT1_MAP
;
2018 vc
->vc_G0_charset
= IBMPC_MAP
;
2020 vc
->vc_G0_charset
= USER_MAP
;
2021 if (vc
->vc_charset
== 0)
2022 vc
->vc_translate
= set_translate(vc
->vc_G0_charset
, vc
);
2023 vc
->vc_state
= ESnormal
;
2027 vc
->vc_G1_charset
= GRAF_MAP
;
2029 vc
->vc_G1_charset
= LAT1_MAP
;
2031 vc
->vc_G1_charset
= IBMPC_MAP
;
2033 vc
->vc_G1_charset
= USER_MAP
;
2034 if (vc
->vc_charset
== 1)
2035 vc
->vc_translate
= set_translate(vc
->vc_G1_charset
, vc
);
2036 vc
->vc_state
= ESnormal
;
2039 vc
->vc_state
= ESnormal
;
2043 /* This is a temporary buffer used to prepare a tty console write
2044 * so that we can easily avoid touching user space while holding the
2045 * console spinlock. It is allocated in con_init and is shared by
2046 * this code and the vc_screen read/write tty calls.
2048 * We have to allocate this statically in the kernel data section
2049 * since console_init (and thus con_init) are called before any
2050 * kernel memory allocation is available.
2052 char con_buf
[CON_BUF_SIZE
];
2053 DEFINE_MUTEX(con_buf_mtx
);
2055 /* is_double_width() is based on the wcwidth() implementation by
2056 * Markus Kuhn -- 2007-05-26 (Unicode 5.0)
2057 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
2064 static int bisearch(uint32_t ucs
, const struct interval
*table
, int max
)
2069 if (ucs
< table
[0].first
|| ucs
> table
[max
].last
)
2071 while (max
>= min
) {
2072 mid
= (min
+ max
) / 2;
2073 if (ucs
> table
[mid
].last
)
2075 else if (ucs
< table
[mid
].first
)
2083 static int is_double_width(uint32_t ucs
)
2085 static const struct interval double_width
[] = {
2086 { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E },
2087 { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF },
2088 { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 },
2089 { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD }
2091 return bisearch(ucs
, double_width
, ARRAY_SIZE(double_width
) - 1);
2094 /* acquires console_sem */
2095 static int do_con_write(struct tty_struct
*tty
, const unsigned char *buf
, int count
)
2097 #ifdef VT_BUF_VRAM_ONLY
2098 #define FLUSH do { } while(0);
2100 #define FLUSH if (draw_x >= 0) { \
2101 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
2106 int c
, tc
, ok
, n
= 0, draw_x
= -1;
2107 unsigned int currcons
;
2108 unsigned long draw_from
= 0, draw_to
= 0;
2110 unsigned char vc_attr
;
2111 struct vt_notifier_param param
;
2115 u16 himask
, charmask
;
2116 const unsigned char *orig_buf
= NULL
;
2124 acquire_console_sem();
2125 vc
= tty
->driver_data
;
2127 printk(KERN_ERR
"vt: argh, driver_data is NULL !\n");
2128 release_console_sem();
2132 currcons
= vc
->vc_num
;
2133 if (!vc_cons_allocated(currcons
)) {
2134 /* could this happen? */
2135 static int error
= 0;
2138 printk("con_write: tty %d not allocated\n", currcons
+1);
2140 release_console_sem();
2146 himask
= vc
->vc_hi_font_mask
;
2147 charmask
= himask
? 0x1ff : 0xff;
2149 /* undraw cursor first */
2155 while (!tty
->stopped
&& count
) {
2165 /* Do no translation at all in control states */
2166 if (vc
->vc_state
!= ESnormal
) {
2168 } else if (vc
->vc_utf
&& !vc
->vc_disp_ctrl
) {
2169 /* Combine UTF-8 into Unicode in vc_utf_char.
2170 * vc_utf_count is the number of continuation bytes still
2171 * expected to arrive.
2172 * vc_npar is the number of continuation bytes arrived so
2176 if ((c
& 0xc0) == 0x80) {
2177 /* Continuation byte received */
2178 static const uint32_t utf8_length_changes
[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff };
2179 if (vc
->vc_utf_count
) {
2180 vc
->vc_utf_char
= (vc
->vc_utf_char
<< 6) | (c
& 0x3f);
2182 if (--vc
->vc_utf_count
) {
2183 /* Still need some bytes */
2186 /* Got a whole character */
2187 c
= vc
->vc_utf_char
;
2188 /* Reject overlong sequences */
2189 if (c
<= utf8_length_changes
[vc
->vc_npar
- 1] ||
2190 c
> utf8_length_changes
[vc
->vc_npar
])
2193 /* Unexpected continuation byte */
2194 vc
->vc_utf_count
= 0;
2198 /* Single ASCII byte or first byte of a sequence received */
2199 if (vc
->vc_utf_count
) {
2200 /* Continuation byte expected */
2202 vc
->vc_utf_count
= 0;
2204 } else if (c
> 0x7f) {
2205 /* First byte of a multibyte sequence received */
2207 if ((c
& 0xe0) == 0xc0) {
2208 vc
->vc_utf_count
= 1;
2209 vc
->vc_utf_char
= (c
& 0x1f);
2210 } else if ((c
& 0xf0) == 0xe0) {
2211 vc
->vc_utf_count
= 2;
2212 vc
->vc_utf_char
= (c
& 0x0f);
2213 } else if ((c
& 0xf8) == 0xf0) {
2214 vc
->vc_utf_count
= 3;
2215 vc
->vc_utf_char
= (c
& 0x07);
2216 } else if ((c
& 0xfc) == 0xf8) {
2217 vc
->vc_utf_count
= 4;
2218 vc
->vc_utf_char
= (c
& 0x03);
2219 } else if ((c
& 0xfe) == 0xfc) {
2220 vc
->vc_utf_count
= 5;
2221 vc
->vc_utf_char
= (c
& 0x01);
2223 /* 254 and 255 are invalid */
2226 if (vc
->vc_utf_count
) {
2227 /* Still need some bytes */
2231 /* Nothing to do if an ASCII byte was received */
2233 /* End of UTF-8 decoding. */
2234 /* c is the received character, or U+FFFD for invalid sequences. */
2235 /* Replace invalid Unicode code points with U+FFFD too */
2236 if ((c
>= 0xd800 && c
<= 0xdfff) || c
== 0xfffe || c
== 0xffff)
2239 } else { /* no utf or alternate charset mode */
2240 tc
= vc_translate(vc
, c
);
2244 if (atomic_notifier_call_chain(&vt_notifier_list
, VT_PREWRITE
,
2245 ¶m
) == NOTIFY_STOP
)
2248 /* If the original code was a control character we
2249 * only allow a glyph to be displayed if the code is
2250 * not normally used (such as for cursor movement) or
2251 * if the disp_ctrl mode has been explicitly enabled.
2252 * Certain characters (as given by the CTRL_ALWAYS
2253 * bitmap) are always displayed as control characters,
2254 * as the console would be pretty useless without
2255 * them; to display an arbitrary font position use the
2256 * direct-to-font zone in UTF-8 mode.
2258 ok
= tc
&& (c
>= 32 ||
2259 !(vc
->vc_disp_ctrl
? (CTRL_ALWAYS
>> c
) & 1 :
2260 vc
->vc_utf
|| ((CTRL_ACTION
>> c
) & 1)))
2261 && (c
!= 127 || vc
->vc_disp_ctrl
)
2264 if (vc
->vc_state
== ESnormal
&& ok
) {
2265 if (vc
->vc_utf
&& !vc
->vc_disp_ctrl
) {
2266 if (is_double_width(c
))
2269 /* Now try to find out how to display it */
2270 tc
= conv_uni_to_pc(vc
, tc
);
2271 if (tc
& ~charmask
) {
2272 if (tc
== -1 || tc
== -2) {
2273 continue; /* nothing to display */
2275 /* Glyph not found */
2276 if ((!(vc
->vc_utf
&& !vc
->vc_disp_ctrl
) || c
< 128) && !(c
& ~charmask
)) {
2277 /* In legacy mode use the glyph we get by a 1:1 mapping.
2278 This would make absolutely no sense with Unicode in mind,
2279 but do this for ASCII characters since a font may lack
2280 Unicode mapping info and we don't want to end up with
2281 having question marks only. */
2284 /* Display U+FFFD. If it's not found, display an inverse question mark. */
2285 tc
= conv_uni_to_pc(vc
, 0xfffd);
2288 tc
= conv_uni_to_pc(vc
, '?');
2289 if (tc
< 0) tc
= '?';
2295 vc_attr
= vc
->vc_attr
;
2297 /* invert vc_attr */
2298 if (!vc
->vc_can_do_color
) {
2299 vc_attr
= (vc
->vc_attr
) ^ 0x08;
2300 } else if (vc
->vc_hi_font_mask
== 0x100) {
2301 vc_attr
= ((vc
->vc_attr
) & 0x11) | (((vc
->vc_attr
) & 0xe0) >> 4) | (((vc
->vc_attr
) & 0x0e) << 4);
2303 vc_attr
= ((vc
->vc_attr
) & 0x88) | (((vc
->vc_attr
) & 0x70) >> 4) | (((vc
->vc_attr
) & 0x07) << 4);
2309 if (vc
->vc_need_wrap
|| vc
->vc_decim
)
2311 if (vc
->vc_need_wrap
) {
2318 ((vc_attr
<< 8) & ~himask
) + ((tc
& 0x100) ? himask
: 0) + (tc
& 0xff) :
2319 (vc_attr
<< 8) + tc
,
2320 (u16
*) vc
->vc_pos
);
2321 if (DO_UPDATE(vc
) && draw_x
< 0) {
2323 draw_from
= vc
->vc_pos
;
2325 if (vc
->vc_x
== vc
->vc_cols
- 1) {
2326 vc
->vc_need_wrap
= vc
->vc_decawm
;
2327 draw_to
= vc
->vc_pos
+ 2;
2330 draw_to
= (vc
->vc_pos
+= 2);
2333 if (!--width
) break;
2335 tc
= conv_uni_to_pc(vc
, ' '); /* A space is printed in the second column */
2336 if (tc
< 0) tc
= ' ';
2338 notify_write(vc
, c
);
2349 goto rescan_last_byte
;
2354 do_con_trol(tty
, vc
, orig
);
2357 console_conditional_schedule();
2358 release_console_sem();
2365 * This is the console switching callback.
2367 * Doing console switching in a process context allows
2368 * us to do the switches asynchronously (needed when we want
2369 * to switch due to a keyboard interrupt). Synchronization
2370 * with other console code and prevention of re-entrancy is
2371 * ensured with console_sem.
2373 static void console_callback(struct work_struct
*ignored
)
2375 acquire_console_sem();
2377 if (want_console
>= 0) {
2378 if (want_console
!= fg_console
&&
2379 vc_cons_allocated(want_console
)) {
2380 hide_cursor(vc_cons
[fg_console
].d
);
2381 change_console(vc_cons
[want_console
].d
);
2382 /* we only changed when the console had already
2383 been allocated - a new console is not created
2384 in an interrupt routine */
2388 if (do_poke_blanked_console
) { /* do not unblank for a LED change */
2389 do_poke_blanked_console
= 0;
2390 poke_blanked_console();
2392 if (scrollback_delta
) {
2393 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
2395 if (vc
->vc_mode
== KD_TEXT
)
2396 vc
->vc_sw
->con_scrolldelta(vc
, scrollback_delta
);
2397 scrollback_delta
= 0;
2399 if (blank_timer_expired
) {
2401 blank_timer_expired
= 0;
2403 notify_update(vc_cons
[fg_console
].d
);
2405 release_console_sem();
2408 int set_console(int nr
)
2410 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
2412 if (!vc_cons_allocated(nr
) || vt_dont_switch
||
2413 (vc
->vt_mode
.mode
== VT_AUTO
&& vc
->vc_mode
== KD_GRAPHICS
)) {
2416 * Console switch will fail in console_callback() or
2417 * change_console() so there is no point scheduling
2420 * Existing set_console() users don't check the return
2421 * value so this shouldn't break anything
2427 schedule_console_callback();
2432 struct tty_driver
*console_driver
;
2434 #ifdef CONFIG_VT_CONSOLE
2437 * Console on virtual terminal
2439 * The console must be locked when we get here.
2442 static void vt_console_print(struct console
*co
, const char *b
, unsigned count
)
2444 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
2446 static DEFINE_SPINLOCK(printing_lock
);
2447 const ushort
*start
;
2451 /* console busy or not yet initialized */
2454 if (!spin_trylock(&printing_lock
))
2457 if (kmsg_redirect
&& vc_cons_allocated(kmsg_redirect
- 1))
2458 vc
= vc_cons
[kmsg_redirect
- 1].d
;
2460 /* read `x' only after setting currcons properly (otherwise
2461 the `x' macro will read the x of the foreground console). */
2464 if (!vc_cons_allocated(fg_console
)) {
2466 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2470 if (vc
->vc_mode
!= KD_TEXT
)
2473 /* undraw cursor first */
2477 start
= (ushort
*)vc
->vc_pos
;
2479 /* Contrived structure to try to emulate original need_wrap behaviour
2480 * Problems caused when we have need_wrap set on '\n' character */
2483 if (c
== 10 || c
== 13 || c
== 8 || vc
->vc_need_wrap
) {
2485 if (CON_IS_VISIBLE(vc
))
2486 vc
->vc_sw
->con_putcs(vc
, start
, cnt
, vc
->vc_y
, vc
->vc_x
);
2488 if (vc
->vc_need_wrap
)
2492 if (c
== 8) { /* backspace */
2494 start
= (ushort
*)vc
->vc_pos
;
2501 start
= (ushort
*)vc
->vc_pos
;
2503 if (c
== 10 || c
== 13)
2506 scr_writew((vc
->vc_attr
<< 8) + c
, (unsigned short *)vc
->vc_pos
);
2507 notify_write(vc
, c
);
2509 if (myx
== vc
->vc_cols
- 1) {
2510 vc
->vc_need_wrap
= 1;
2517 if (CON_IS_VISIBLE(vc
))
2518 vc
->vc_sw
->con_putcs(vc
, start
, cnt
, vc
->vc_y
, vc
->vc_x
);
2520 if (vc
->vc_x
== vc
->vc_cols
) {
2522 vc
->vc_need_wrap
= 1;
2529 spin_unlock(&printing_lock
);
2532 static struct tty_driver
*vt_console_device(struct console
*c
, int *index
)
2534 *index
= c
->index
? c
->index
-1 : fg_console
;
2535 return console_driver
;
2538 static struct console vt_console_driver
= {
2540 .write
= vt_console_print
,
2541 .device
= vt_console_device
,
2542 .unblank
= unblank_screen
,
2543 .flags
= CON_PRINTBUFFER
,
2549 * Handling of Linux-specific VC ioctls
2553 * Generally a bit racy with respect to console_sem().
2555 * There are some functions which don't need it.
2557 * There are some functions which can sleep for arbitrary periods
2558 * (paste_selection) but we don't need the lock there anyway.
2560 * set_selection has locking, and definitely needs it
2563 int tioclinux(struct tty_struct
*tty
, unsigned long arg
)
2566 char __user
*p
= (char __user
*)arg
;
2570 if (current
->signal
->tty
!= tty
&& !capable(CAP_SYS_ADMIN
))
2572 if (get_user(type
, p
))
2581 acquire_console_sem();
2582 ret
= set_selection((struct tiocl_selection __user
*)(p
+1), tty
);
2583 release_console_sem();
2585 case TIOCL_PASTESEL
:
2586 ret
= paste_selection(tty
);
2588 case TIOCL_UNBLANKSCREEN
:
2589 acquire_console_sem();
2591 release_console_sem();
2593 case TIOCL_SELLOADLUT
:
2594 ret
= sel_loadlut(p
);
2596 case TIOCL_GETSHIFTSTATE
:
2599 * Make it possible to react to Shift+Mousebutton.
2600 * Note that 'shift_state' is an undocumented
2601 * kernel-internal variable; programs not closely
2602 * related to the kernel should not use this.
2605 ret
= __put_user(data
, p
);
2607 case TIOCL_GETMOUSEREPORTING
:
2608 data
= mouse_reporting();
2609 ret
= __put_user(data
, p
);
2611 case TIOCL_SETVESABLANK
:
2612 ret
= set_vesa_blanking(p
);
2614 case TIOCL_GETKMSGREDIRECT
:
2615 data
= kmsg_redirect
;
2616 ret
= __put_user(data
, p
);
2618 case TIOCL_SETKMSGREDIRECT
:
2619 if (!capable(CAP_SYS_ADMIN
)) {
2622 if (get_user(data
, p
+1))
2625 kmsg_redirect
= data
;
2628 case TIOCL_GETFGCONSOLE
:
2631 case TIOCL_SCROLLCONSOLE
:
2632 if (get_user(lines
, (s32 __user
*)(p
+4))) {
2635 scrollfront(vc_cons
[fg_console
].d
, lines
);
2639 case TIOCL_BLANKSCREEN
: /* until explicitly unblanked, not only poked */
2640 acquire_console_sem();
2643 release_console_sem();
2645 case TIOCL_BLANKEDSCREEN
:
2646 ret
= console_blanked
;
2657 * /dev/ttyN handling
2660 static int con_write(struct tty_struct
*tty
, const unsigned char *buf
, int count
)
2664 retval
= do_con_write(tty
, buf
, count
);
2665 con_flush_chars(tty
);
2670 static int con_put_char(struct tty_struct
*tty
, unsigned char ch
)
2673 return 0; /* n_r3964 calls put_char() from interrupt context */
2674 return do_con_write(tty
, &ch
, 1);
2677 static int con_write_room(struct tty_struct
*tty
)
2681 return 32768; /* No limit, really; we're not buffering */
2684 static int con_chars_in_buffer(struct tty_struct
*tty
)
2686 return 0; /* we're not buffering */
2690 * con_throttle and con_unthrottle are only used for
2691 * paste_selection(), which has to stuff in a large number of
2694 static void con_throttle(struct tty_struct
*tty
)
2698 static void con_unthrottle(struct tty_struct
*tty
)
2700 struct vc_data
*vc
= tty
->driver_data
;
2702 wake_up_interruptible(&vc
->paste_wait
);
2706 * Turn the Scroll-Lock LED on when the tty is stopped
2708 static void con_stop(struct tty_struct
*tty
)
2713 console_num
= tty
->index
;
2714 if (!vc_cons_allocated(console_num
))
2716 set_vc_kbd_led(kbd_table
+ console_num
, VC_SCROLLOCK
);
2721 * Turn the Scroll-Lock LED off when the console is started
2723 static void con_start(struct tty_struct
*tty
)
2728 console_num
= tty
->index
;
2729 if (!vc_cons_allocated(console_num
))
2731 clr_vc_kbd_led(kbd_table
+ console_num
, VC_SCROLLOCK
);
2735 static void con_flush_chars(struct tty_struct
*tty
)
2739 if (in_interrupt()) /* from flush_to_ldisc */
2742 /* if we race with con_close(), vt may be null */
2743 acquire_console_sem();
2744 vc
= tty
->driver_data
;
2747 release_console_sem();
2751 * Allocate the console screen memory.
2753 static int con_open(struct tty_struct
*tty
, struct file
*filp
)
2755 unsigned int currcons
= tty
->index
;
2758 acquire_console_sem();
2759 if (tty
->driver_data
== NULL
) {
2760 ret
= vc_allocate(currcons
);
2762 struct vc_data
*vc
= vc_cons
[currcons
].d
;
2764 /* Still being freed */
2766 release_console_sem();
2767 return -ERESTARTSYS
;
2769 tty
->driver_data
= vc
;
2772 if (!tty
->winsize
.ws_row
&& !tty
->winsize
.ws_col
) {
2773 tty
->winsize
.ws_row
= vc_cons
[currcons
].d
->vc_rows
;
2774 tty
->winsize
.ws_col
= vc_cons
[currcons
].d
->vc_cols
;
2777 tty
->termios
->c_iflag
|= IUTF8
;
2779 tty
->termios
->c_iflag
&= ~IUTF8
;
2780 release_console_sem();
2784 release_console_sem();
2788 static void con_close(struct tty_struct
*tty
, struct file
*filp
)
2790 /* Nothing to do - we defer to shutdown */
2793 static void con_shutdown(struct tty_struct
*tty
)
2795 struct vc_data
*vc
= tty
->driver_data
;
2797 acquire_console_sem();
2799 release_console_sem();
2803 static int default_italic_color
= 2; // green (ASCII)
2804 static int default_underline_color
= 3; // cyan (ASCII)
2805 module_param_named(italic
, default_italic_color
, int, S_IRUGO
| S_IWUSR
);
2806 module_param_named(underline
, default_underline_color
, int, S_IRUGO
| S_IWUSR
);
2808 static void vc_init(struct vc_data
*vc
, unsigned int rows
,
2809 unsigned int cols
, int do_clear
)
2815 vc
->vc_size_row
= cols
<< 1;
2816 vc
->vc_screenbuf_size
= vc
->vc_rows
* vc
->vc_size_row
;
2819 vc
->vc_pos
= vc
->vc_origin
;
2821 for (j
=k
=0; j
<16; j
++) {
2822 vc
->vc_palette
[k
++] = default_red
[j
] ;
2823 vc
->vc_palette
[k
++] = default_grn
[j
] ;
2824 vc
->vc_palette
[k
++] = default_blu
[j
] ;
2826 vc
->vc_def_color
= 0x07; /* white */
2827 vc
->vc_ulcolor
= default_underline_color
;
2828 vc
->vc_itcolor
= default_italic_color
;
2829 vc
->vc_halfcolor
= 0x08; /* grey */
2830 init_waitqueue_head(&vc
->paste_wait
);
2831 reset_terminal(vc
, do_clear
);
2835 * This routine initializes console interrupts, and does nothing
2836 * else. If you want the screen to clear, call tty_write with
2837 * the appropriate escape-sequence.
2840 static int __init
con_init(void)
2842 const char *display_desc
= NULL
;
2844 unsigned int currcons
= 0, i
;
2846 acquire_console_sem();
2849 display_desc
= conswitchp
->con_startup();
2850 if (!display_desc
) {
2852 release_console_sem();
2856 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
2857 struct con_driver
*con_driver
= ®istered_con_driver
[i
];
2859 if (con_driver
->con
== NULL
) {
2860 con_driver
->con
= conswitchp
;
2861 con_driver
->desc
= display_desc
;
2862 con_driver
->flag
= CON_DRIVER_FLAG_INIT
;
2863 con_driver
->first
= 0;
2864 con_driver
->last
= MAX_NR_CONSOLES
- 1;
2869 for (i
= 0; i
< MAX_NR_CONSOLES
; i
++)
2870 con_driver_map
[i
] = conswitchp
;
2872 if (blankinterval
) {
2873 blank_state
= blank_normal_wait
;
2874 mod_timer(&console_timer
, jiffies
+ blankinterval
);
2877 for (currcons
= 0; currcons
< MIN_NR_CONSOLES
; currcons
++) {
2878 vc_cons
[currcons
].d
= vc
= kzalloc(sizeof(struct vc_data
), GFP_NOWAIT
);
2879 INIT_WORK(&vc_cons
[currcons
].SAK_work
, vc_SAK
);
2880 visual_init(vc
, currcons
, 1);
2881 vc
->vc_screenbuf
= kzalloc(vc
->vc_screenbuf_size
, GFP_NOWAIT
);
2882 vc
->vc_kmalloced
= 0;
2883 vc_init(vc
, vc
->vc_rows
, vc
->vc_cols
,
2884 currcons
|| !vc
->vc_sw
->con_save_screen
);
2886 currcons
= fg_console
= 0;
2887 master_display_fg
= vc
= vc_cons
[currcons
].d
;
2890 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
);
2893 printk("Console: %s %s %dx%d",
2894 vc
->vc_can_do_color
? "colour" : "mono",
2895 display_desc
, vc
->vc_cols
, vc
->vc_rows
);
2899 release_console_sem();
2901 #ifdef CONFIG_VT_CONSOLE
2902 register_console(&vt_console_driver
);
2906 console_initcall(con_init
);
2908 static const struct tty_operations con_ops
= {
2912 .write_room
= con_write_room
,
2913 .put_char
= con_put_char
,
2914 .flush_chars
= con_flush_chars
,
2915 .chars_in_buffer
= con_chars_in_buffer
,
2919 .throttle
= con_throttle
,
2920 .unthrottle
= con_unthrottle
,
2921 .resize
= vt_resize
,
2922 .shutdown
= con_shutdown
2925 static struct cdev vc0_cdev
;
2927 int __init
vty_init(const struct file_operations
*console_fops
)
2929 cdev_init(&vc0_cdev
, console_fops
);
2930 if (cdev_add(&vc0_cdev
, MKDEV(TTY_MAJOR
, 0), 1) ||
2931 register_chrdev_region(MKDEV(TTY_MAJOR
, 0), 1, "/dev/vc/0") < 0)
2932 panic("Couldn't register /dev/tty0 driver\n");
2933 device_create(tty_class
, NULL
, MKDEV(TTY_MAJOR
, 0), NULL
, "tty0");
2937 console_driver
= alloc_tty_driver(MAX_NR_CONSOLES
);
2938 if (!console_driver
)
2939 panic("Couldn't allocate console driver\n");
2940 console_driver
->owner
= THIS_MODULE
;
2941 console_driver
->name
= "tty";
2942 console_driver
->name_base
= 1;
2943 console_driver
->major
= TTY_MAJOR
;
2944 console_driver
->minor_start
= 1;
2945 console_driver
->type
= TTY_DRIVER_TYPE_CONSOLE
;
2946 console_driver
->init_termios
= tty_std_termios
;
2948 console_driver
->init_termios
.c_iflag
|= IUTF8
;
2949 console_driver
->flags
= TTY_DRIVER_REAL_RAW
| TTY_DRIVER_RESET_TERMIOS
;
2950 tty_set_operations(console_driver
, &con_ops
);
2951 if (tty_register_driver(console_driver
))
2952 panic("Couldn't register console driver\n");
2955 #ifdef CONFIG_PROM_CONSOLE
2958 #ifdef CONFIG_MDA_CONSOLE
2964 #ifndef VT_SINGLE_DRIVER
2965 #include <linux/device.h>
2967 static struct class *vtconsole_class
;
2969 static int bind_con_driver(const struct consw
*csw
, int first
, int last
,
2972 struct module
*owner
= csw
->owner
;
2973 const char *desc
= NULL
;
2974 struct con_driver
*con_driver
;
2975 int i
, j
= -1, k
= -1, retval
= -ENODEV
;
2977 if (!try_module_get(owner
))
2980 acquire_console_sem();
2982 /* check if driver is registered */
2983 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
2984 con_driver
= ®istered_con_driver
[i
];
2986 if (con_driver
->con
== csw
) {
2987 desc
= con_driver
->desc
;
2996 if (!(con_driver
->flag
& CON_DRIVER_FLAG_INIT
)) {
2998 con_driver
->flag
|= CON_DRIVER_FLAG_INIT
;
3003 module_put(conswitchp
->owner
);
3005 __module_get(owner
);
3009 first
= max(first
, con_driver
->first
);
3010 last
= min(last
, con_driver
->last
);
3012 for (i
= first
; i
<= last
; i
++) {
3014 struct vc_data
*vc
= vc_cons
[i
].d
;
3016 if (con_driver_map
[i
])
3017 module_put(con_driver_map
[i
]->owner
);
3018 __module_get(owner
);
3019 con_driver_map
[i
] = csw
;
3021 if (!vc
|| !vc
->vc_sw
)
3026 if (CON_IS_VISIBLE(vc
)) {
3031 old_was_color
= vc
->vc_can_do_color
;
3032 vc
->vc_sw
->con_deinit(vc
);
3033 vc
->vc_origin
= (unsigned long)vc
->vc_screenbuf
;
3034 visual_init(vc
, i
, 0);
3038 /* If the console changed between mono <-> color, then
3039 * the attributes in the screenbuf will be wrong. The
3040 * following resets all attributes to something sane.
3042 if (old_was_color
!= vc
->vc_can_do_color
)
3043 clear_buffer_attributes(vc
);
3046 printk("Console: switching ");
3048 printk("consoles %d-%d ", first
+1, last
+1);
3050 struct vc_data
*vc
= vc_cons
[j
].d
;
3052 printk("to %s %s %dx%d\n",
3053 vc
->vc_can_do_color
? "colour" : "mono",
3054 desc
, vc
->vc_cols
, vc
->vc_rows
);
3061 printk("to %s\n", desc
);
3065 release_console_sem();
3070 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
3071 static int con_is_graphics(const struct consw
*csw
, int first
, int last
)
3075 for (i
= first
; i
<= last
; i
++) {
3076 struct vc_data
*vc
= vc_cons
[i
].d
;
3078 if (vc
&& vc
->vc_mode
== KD_GRAPHICS
) {
3088 * unbind_con_driver - unbind a console driver
3089 * @csw: pointer to console driver to unregister
3090 * @first: first in range of consoles that @csw should be unbound from
3091 * @last: last in range of consoles that @csw should be unbound from
3092 * @deflt: should next bound console driver be default after @csw is unbound?
3094 * To unbind a driver from all possible consoles, pass 0 as @first and
3095 * %MAX_NR_CONSOLES as @last.
3097 * @deflt controls whether the console that ends up replacing @csw should be
3098 * the default console.
3101 * -ENODEV if @csw isn't a registered console driver or can't be unregistered
3104 int unbind_con_driver(const struct consw
*csw
, int first
, int last
, int deflt
)
3106 struct module
*owner
= csw
->owner
;
3107 const struct consw
*defcsw
= NULL
;
3108 struct con_driver
*con_driver
= NULL
, *con_back
= NULL
;
3109 int i
, retval
= -ENODEV
;
3111 if (!try_module_get(owner
))
3114 acquire_console_sem();
3116 /* check if driver is registered and if it is unbindable */
3117 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3118 con_driver
= ®istered_con_driver
[i
];
3120 if (con_driver
->con
== csw
&&
3121 con_driver
->flag
& CON_DRIVER_FLAG_MODULE
) {
3128 release_console_sem();
3134 /* check if backup driver exists */
3135 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3136 con_back
= ®istered_con_driver
[i
];
3138 if (con_back
->con
&&
3139 !(con_back
->flag
& CON_DRIVER_FLAG_MODULE
)) {
3140 defcsw
= con_back
->con
;
3147 release_console_sem();
3151 if (!con_is_bound(csw
)) {
3152 release_console_sem();
3156 first
= max(first
, con_driver
->first
);
3157 last
= min(last
, con_driver
->last
);
3159 for (i
= first
; i
<= last
; i
++) {
3160 if (con_driver_map
[i
] == csw
) {
3161 module_put(csw
->owner
);
3162 con_driver_map
[i
] = NULL
;
3166 if (!con_is_bound(defcsw
)) {
3167 const struct consw
*defconsw
= conswitchp
;
3169 defcsw
->con_startup();
3170 con_back
->flag
|= CON_DRIVER_FLAG_INIT
;
3172 * vgacon may change the default driver to point
3173 * to dummycon, we restore it here...
3175 conswitchp
= defconsw
;
3178 if (!con_is_bound(csw
))
3179 con_driver
->flag
&= ~CON_DRIVER_FLAG_INIT
;
3181 release_console_sem();
3182 /* ignore return value, binding should not fail */
3183 bind_con_driver(defcsw
, first
, last
, deflt
);
3189 EXPORT_SYMBOL(unbind_con_driver
);
3191 static int vt_bind(struct con_driver
*con
)
3193 const struct consw
*defcsw
= NULL
, *csw
= NULL
;
3194 int i
, more
= 1, first
= -1, last
= -1, deflt
= 0;
3196 if (!con
->con
|| !(con
->flag
& CON_DRIVER_FLAG_MODULE
) ||
3197 con_is_graphics(con
->con
, con
->first
, con
->last
))
3202 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3203 struct con_driver
*con
= ®istered_con_driver
[i
];
3205 if (con
->con
&& !(con
->flag
& CON_DRIVER_FLAG_MODULE
)) {
3217 for (i
= con
->first
; i
<= con
->last
; i
++) {
3218 if (con_driver_map
[i
] == defcsw
) {
3223 } else if (first
!= -1)
3227 if (first
== 0 && last
== MAX_NR_CONSOLES
-1)
3231 bind_con_driver(csw
, first
, last
, deflt
);
3242 static int vt_unbind(struct con_driver
*con
)
3244 const struct consw
*csw
= NULL
;
3245 int i
, more
= 1, first
= -1, last
= -1, deflt
= 0;
3247 if (!con
->con
|| !(con
->flag
& CON_DRIVER_FLAG_MODULE
) ||
3248 con_is_graphics(con
->con
, con
->first
, con
->last
))
3256 for (i
= con
->first
; i
<= con
->last
; i
++) {
3257 if (con_driver_map
[i
] == csw
) {
3262 } else if (first
!= -1)
3266 if (first
== 0 && last
== MAX_NR_CONSOLES
-1)
3270 unbind_con_driver(csw
, first
, last
, deflt
);
3281 static inline int vt_bind(struct con_driver
*con
)
3285 static inline int vt_unbind(struct con_driver
*con
)
3289 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3291 static ssize_t
store_bind(struct device
*dev
, struct device_attribute
*attr
,
3292 const char *buf
, size_t count
)
3294 struct con_driver
*con
= dev_get_drvdata(dev
);
3295 int bind
= simple_strtoul(buf
, NULL
, 0);
3305 static ssize_t
show_bind(struct device
*dev
, struct device_attribute
*attr
,
3308 struct con_driver
*con
= dev_get_drvdata(dev
);
3309 int bind
= con_is_bound(con
->con
);
3311 return snprintf(buf
, PAGE_SIZE
, "%i\n", bind
);
3314 static ssize_t
show_name(struct device
*dev
, struct device_attribute
*attr
,
3317 struct con_driver
*con
= dev_get_drvdata(dev
);
3319 return snprintf(buf
, PAGE_SIZE
, "%s %s\n",
3320 (con
->flag
& CON_DRIVER_FLAG_MODULE
) ? "(M)" : "(S)",
3325 static struct device_attribute device_attrs
[] = {
3326 __ATTR(bind
, S_IRUGO
|S_IWUSR
, show_bind
, store_bind
),
3327 __ATTR(name
, S_IRUGO
, show_name
, NULL
),
3330 static int vtconsole_init_device(struct con_driver
*con
)
3335 con
->flag
|= CON_DRIVER_FLAG_ATTR
;
3336 dev_set_drvdata(con
->dev
, con
);
3337 for (i
= 0; i
< ARRAY_SIZE(device_attrs
); i
++) {
3338 error
= device_create_file(con
->dev
, &device_attrs
[i
]);
3345 device_remove_file(con
->dev
, &device_attrs
[i
]);
3346 con
->flag
&= ~CON_DRIVER_FLAG_ATTR
;
3352 static void vtconsole_deinit_device(struct con_driver
*con
)
3356 if (con
->flag
& CON_DRIVER_FLAG_ATTR
) {
3357 for (i
= 0; i
< ARRAY_SIZE(device_attrs
); i
++)
3358 device_remove_file(con
->dev
, &device_attrs
[i
]);
3359 con
->flag
&= ~CON_DRIVER_FLAG_ATTR
;
3364 * con_is_bound - checks if driver is bound to the console
3365 * @csw: console driver
3367 * RETURNS: zero if unbound, nonzero if bound
3369 * Drivers can call this and if zero, they should release
3370 * all resources allocated on con_startup()
3372 int con_is_bound(const struct consw
*csw
)
3376 for (i
= 0; i
< MAX_NR_CONSOLES
; i
++) {
3377 if (con_driver_map
[i
] == csw
) {
3385 EXPORT_SYMBOL(con_is_bound
);
3388 * register_con_driver - register console driver to console layer
3389 * @csw: console driver
3390 * @first: the first console to take over, minimum value is 0
3391 * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1
3393 * DESCRIPTION: This function registers a console driver which can later
3394 * bind to a range of consoles specified by @first and @last. It will
3395 * also initialize the console driver by calling con_startup().
3397 int register_con_driver(const struct consw
*csw
, int first
, int last
)
3399 struct module
*owner
= csw
->owner
;
3400 struct con_driver
*con_driver
;
3404 if (!try_module_get(owner
))
3407 acquire_console_sem();
3409 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3410 con_driver
= ®istered_con_driver
[i
];
3412 /* already registered */
3413 if (con_driver
->con
== csw
)
3420 desc
= csw
->con_startup();
3427 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3428 con_driver
= ®istered_con_driver
[i
];
3430 if (con_driver
->con
== NULL
) {
3431 con_driver
->con
= csw
;
3432 con_driver
->desc
= desc
;
3433 con_driver
->node
= i
;
3434 con_driver
->flag
= CON_DRIVER_FLAG_MODULE
|
3435 CON_DRIVER_FLAG_INIT
;
3436 con_driver
->first
= first
;
3437 con_driver
->last
= last
;
3446 con_driver
->dev
= device_create(vtconsole_class
, NULL
,
3447 MKDEV(0, con_driver
->node
),
3451 if (IS_ERR(con_driver
->dev
)) {
3452 printk(KERN_WARNING
"Unable to create device for %s; "
3453 "errno = %ld\n", con_driver
->desc
,
3454 PTR_ERR(con_driver
->dev
));
3455 con_driver
->dev
= NULL
;
3457 vtconsole_init_device(con_driver
);
3461 release_console_sem();
3465 EXPORT_SYMBOL(register_con_driver
);
3468 * unregister_con_driver - unregister console driver from console layer
3469 * @csw: console driver
3471 * DESCRIPTION: All drivers that registers to the console layer must
3472 * call this function upon exit, or if the console driver is in a state
3473 * where it won't be able to handle console services, such as the
3474 * framebuffer console without loaded framebuffer drivers.
3476 * The driver must unbind first prior to unregistration.
3478 int unregister_con_driver(const struct consw
*csw
)
3480 int i
, retval
= -ENODEV
;
3482 acquire_console_sem();
3484 /* cannot unregister a bound driver */
3485 if (con_is_bound(csw
))
3488 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3489 struct con_driver
*con_driver
= ®istered_con_driver
[i
];
3491 if (con_driver
->con
== csw
&&
3492 con_driver
->flag
& CON_DRIVER_FLAG_MODULE
) {
3493 vtconsole_deinit_device(con_driver
);
3494 device_destroy(vtconsole_class
,
3495 MKDEV(0, con_driver
->node
));
3496 con_driver
->con
= NULL
;
3497 con_driver
->desc
= NULL
;
3498 con_driver
->dev
= NULL
;
3499 con_driver
->node
= 0;
3500 con_driver
->flag
= 0;
3501 con_driver
->first
= 0;
3502 con_driver
->last
= 0;
3508 release_console_sem();
3511 EXPORT_SYMBOL(unregister_con_driver
);
3514 * If we support more console drivers, this function is used
3515 * when a driver wants to take over some existing consoles
3516 * and become default driver for newly opened ones.
3518 * take_over_console is basically a register followed by unbind
3520 int take_over_console(const struct consw
*csw
, int first
, int last
, int deflt
)
3524 err
= register_con_driver(csw
, first
, last
);
3527 bind_con_driver(csw
, first
, last
, deflt
);
3533 * give_up_console is a wrapper to unregister_con_driver. It will only
3534 * work if driver is fully unbound.
3536 void give_up_console(const struct consw
*csw
)
3538 unregister_con_driver(csw
);
3541 static int __init
vtconsole_class_init(void)
3545 vtconsole_class
= class_create(THIS_MODULE
, "vtconsole");
3546 if (IS_ERR(vtconsole_class
)) {
3547 printk(KERN_WARNING
"Unable to create vt console class; "
3548 "errno = %ld\n", PTR_ERR(vtconsole_class
));
3549 vtconsole_class
= NULL
;
3552 /* Add system drivers to sysfs */
3553 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3554 struct con_driver
*con
= ®istered_con_driver
[i
];
3556 if (con
->con
&& !con
->dev
) {
3557 con
->dev
= device_create(vtconsole_class
, NULL
,
3558 MKDEV(0, con
->node
),
3562 if (IS_ERR(con
->dev
)) {
3563 printk(KERN_WARNING
"Unable to create "
3564 "device for %s; errno = %ld\n",
3565 con
->desc
, PTR_ERR(con
->dev
));
3568 vtconsole_init_device(con
);
3575 postcore_initcall(vtconsole_class_init
);
3583 static int set_vesa_blanking(char __user
*p
)
3587 if (get_user(mode
, p
+ 1))
3590 vesa_blank_mode
= (mode
< 4) ? mode
: 0;
3594 void do_blank_screen(int entering_gfx
)
3596 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
3599 WARN_CONSOLE_UNLOCKED();
3601 if (console_blanked
) {
3602 if (blank_state
== blank_vesa_wait
) {
3603 blank_state
= blank_off
;
3604 vc
->vc_sw
->con_blank(vc
, vesa_blank_mode
+ 1, 0);
3609 /* entering graphics mode? */
3613 vc
->vc_sw
->con_blank(vc
, -1, 1);
3614 console_blanked
= fg_console
+ 1;
3615 blank_state
= blank_off
;
3620 if (blank_state
!= blank_normal_wait
)
3622 blank_state
= blank_off
;
3624 /* don't blank graphics */
3625 if (vc
->vc_mode
!= KD_TEXT
) {
3626 console_blanked
= fg_console
+ 1;
3631 del_timer_sync(&console_timer
);
3632 blank_timer_expired
= 0;
3635 /* In case we need to reset origin, blanking hook returns 1 */
3636 i
= vc
->vc_sw
->con_blank(vc
, vesa_off_interval
? 1 : (vesa_blank_mode
+ 1), 0);
3637 console_blanked
= fg_console
+ 1;
3641 if (console_blank_hook
&& console_blank_hook(1))
3644 if (vesa_off_interval
&& vesa_blank_mode
) {
3645 blank_state
= blank_vesa_wait
;
3646 mod_timer(&console_timer
, jiffies
+ vesa_off_interval
);
3649 EXPORT_SYMBOL(do_blank_screen
);
3652 * Called by timer as well as from vt_console_driver
3654 void do_unblank_screen(int leaving_gfx
)
3658 /* This should now always be called from a "sane" (read: can schedule)
3659 * context for the sake of the low level drivers, except in the special
3660 * case of oops_in_progress
3662 if (!oops_in_progress
)
3665 WARN_CONSOLE_UNLOCKED();
3668 if (!console_blanked
)
3670 if (!vc_cons_allocated(fg_console
)) {
3672 printk("unblank_screen: tty %d not allocated ??\n", fg_console
+1);
3675 vc
= vc_cons
[fg_console
].d
;
3676 if (vc
->vc_mode
!= KD_TEXT
)
3677 return; /* but leave console_blanked != 0 */
3679 if (blankinterval
) {
3680 mod_timer(&console_timer
, jiffies
+ blankinterval
);
3681 blank_state
= blank_normal_wait
;
3684 console_blanked
= 0;
3685 if (vc
->vc_sw
->con_blank(vc
, 0, leaving_gfx
))
3686 /* Low-level driver cannot restore -> do it ourselves */
3688 if (console_blank_hook
)
3689 console_blank_hook(0);
3693 EXPORT_SYMBOL(do_unblank_screen
);
3696 * This is called by the outside world to cause a forced unblank, mostly for
3697 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
3698 * call it with 1 as an argument and so force a mode restore... that may kill
3699 * X or at least garbage the screen but would also make the Oops visible...
3701 void unblank_screen(void)
3703 do_unblank_screen(0);
3707 * We defer the timer blanking to work queue so it can take the console mutex
3708 * (console operations can still happen at irq time, but only from printk which
3709 * has the console mutex. Not perfect yet, but better than no locking
3711 static void blank_screen_t(unsigned long dummy
)
3713 if (unlikely(!keventd_up())) {
3714 mod_timer(&console_timer
, jiffies
+ blankinterval
);
3717 blank_timer_expired
= 1;
3718 schedule_work(&console_work
);
3721 void poke_blanked_console(void)
3723 WARN_CONSOLE_UNLOCKED();
3725 /* Add this so we quickly catch whoever might call us in a non
3726 * safe context. Nowadays, unblank_screen() isn't to be called in
3727 * atomic contexts and is allowed to schedule (with the special case
3728 * of oops_in_progress, but that isn't of any concern for this
3733 /* This isn't perfectly race free, but a race here would be mostly harmless,
3734 * at worse, we'll do a spurrious blank and it's unlikely
3736 del_timer(&console_timer
);
3737 blank_timer_expired
= 0;
3739 if (ignore_poke
|| !vc_cons
[fg_console
].d
|| vc_cons
[fg_console
].d
->vc_mode
== KD_GRAPHICS
)
3741 if (console_blanked
)
3743 else if (blankinterval
) {
3744 mod_timer(&console_timer
, jiffies
+ blankinterval
);
3745 blank_state
= blank_normal_wait
;
3753 static void set_palette(struct vc_data
*vc
)
3755 WARN_CONSOLE_UNLOCKED();
3757 if (vc
->vc_mode
!= KD_GRAPHICS
)
3758 vc
->vc_sw
->con_set_palette(vc
, color_table
);
3761 static int set_get_cmap(unsigned char __user
*arg
, int set
)
3765 WARN_CONSOLE_UNLOCKED();
3767 for (i
= 0; i
< 16; i
++)
3769 get_user(default_red
[i
], arg
++);
3770 get_user(default_grn
[i
], arg
++);
3771 get_user(default_blu
[i
], arg
++);
3773 put_user(default_red
[i
], arg
++);
3774 put_user(default_grn
[i
], arg
++);
3775 put_user(default_blu
[i
], arg
++);
3778 for (i
= 0; i
< MAX_NR_CONSOLES
; i
++)
3779 if (vc_cons_allocated(i
)) {
3780 for (j
= k
= 0; j
< 16; j
++) {
3781 vc_cons
[i
].d
->vc_palette
[k
++] = default_red
[j
];
3782 vc_cons
[i
].d
->vc_palette
[k
++] = default_grn
[j
];
3783 vc_cons
[i
].d
->vc_palette
[k
++] = default_blu
[j
];
3785 set_palette(vc_cons
[i
].d
);
3792 * Load palette into the DAC registers. arg points to a colour
3793 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
3796 int con_set_cmap(unsigned char __user
*arg
)
3800 acquire_console_sem();
3801 rc
= set_get_cmap (arg
,1);
3802 release_console_sem();
3807 int con_get_cmap(unsigned char __user
*arg
)
3811 acquire_console_sem();
3812 rc
= set_get_cmap (arg
,0);
3813 release_console_sem();
3818 void reset_palette(struct vc_data
*vc
)
3821 for (j
=k
=0; j
<16; j
++) {
3822 vc
->vc_palette
[k
++] = default_red
[j
];
3823 vc
->vc_palette
[k
++] = default_grn
[j
];
3824 vc
->vc_palette
[k
++] = default_blu
[j
];
3832 * Currently we only support fonts up to 32 pixels wide, at a maximum height
3833 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
3834 * depending on width) reserved for each character which is kinda wasty, but
3835 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
3836 * is upto the actual low-level console-driver convert data into its favorite
3837 * format (maybe we should add a `fontoffset' field to the `display'
3838 * structure so we won't have to convert the fontdata all the time.
3842 #define max_font_size 65536
3844 static int con_font_get(struct vc_data
*vc
, struct console_font_op
*op
)
3846 struct console_font font
;
3850 if (vc
->vc_mode
!= KD_TEXT
)
3854 font
.data
= kmalloc(max_font_size
, GFP_KERNEL
);
3860 acquire_console_sem();
3861 if (vc
->vc_sw
->con_font_get
)
3862 rc
= vc
->vc_sw
->con_font_get(vc
, &font
);
3865 release_console_sem();
3870 c
= (font
.width
+7)/8 * 32 * font
.charcount
;
3872 if (op
->data
&& font
.charcount
> op
->charcount
)
3874 if (!(op
->flags
& KD_FONT_FLAG_OLD
)) {
3875 if (font
.width
> op
->width
|| font
.height
> op
->height
)
3878 if (font
.width
!= 8)
3880 else if ((op
->height
&& font
.height
> op
->height
) ||
3887 op
->height
= font
.height
;
3888 op
->width
= font
.width
;
3889 op
->charcount
= font
.charcount
;
3891 if (op
->data
&& copy_to_user(op
->data
, font
.data
, c
))
3899 static int con_font_set(struct vc_data
*vc
, struct console_font_op
*op
)
3901 struct console_font font
;
3905 if (vc
->vc_mode
!= KD_TEXT
)
3909 if (op
->charcount
> 512)
3911 if (!op
->height
) { /* Need to guess font height [compat] */
3913 u8 __user
*charmap
= op
->data
;
3916 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
3917 so that we can get rid of this soon */
3918 if (!(op
->flags
& KD_FONT_FLAG_OLD
))
3920 for (h
= 32; h
> 0; h
--)
3921 for (i
= 0; i
< op
->charcount
; i
++) {
3922 if (get_user(tmp
, &charmap
[32*i
+h
-1]))
3931 if (op
->width
<= 0 || op
->width
> 32 || op
->height
> 32)
3933 size
= (op
->width
+7)/8 * 32 * op
->charcount
;
3934 if (size
> max_font_size
)
3936 font
.charcount
= op
->charcount
;
3937 font
.height
= op
->height
;
3938 font
.width
= op
->width
;
3939 font
.data
= kmalloc(size
, GFP_KERNEL
);
3942 if (copy_from_user(font
.data
, op
->data
, size
)) {
3946 acquire_console_sem();
3947 if (vc
->vc_sw
->con_font_set
)
3948 rc
= vc
->vc_sw
->con_font_set(vc
, &font
, op
->flags
);
3951 release_console_sem();
3956 static int con_font_default(struct vc_data
*vc
, struct console_font_op
*op
)
3958 struct console_font font
= {.width
= op
->width
, .height
= op
->height
};
3959 char name
[MAX_FONT_NAME
];
3963 if (vc
->vc_mode
!= KD_TEXT
)
3968 else if (strncpy_from_user(name
, op
->data
, MAX_FONT_NAME
- 1) < 0)
3971 name
[MAX_FONT_NAME
- 1] = 0;
3973 acquire_console_sem();
3974 if (vc
->vc_sw
->con_font_default
)
3975 rc
= vc
->vc_sw
->con_font_default(vc
, &font
, s
);
3978 release_console_sem();
3980 op
->width
= font
.width
;
3981 op
->height
= font
.height
;
3986 static int con_font_copy(struct vc_data
*vc
, struct console_font_op
*op
)
3988 int con
= op
->height
;
3991 if (vc
->vc_mode
!= KD_TEXT
)
3994 acquire_console_sem();
3995 if (!vc
->vc_sw
->con_font_copy
)
3997 else if (con
< 0 || !vc_cons_allocated(con
))
3999 else if (con
== vc
->vc_num
) /* nothing to do */
4002 rc
= vc
->vc_sw
->con_font_copy(vc
, con
);
4003 release_console_sem();
4007 int con_font_op(struct vc_data
*vc
, struct console_font_op
*op
)
4010 case KD_FONT_OP_SET
:
4011 return con_font_set(vc
, op
);
4012 case KD_FONT_OP_GET
:
4013 return con_font_get(vc
, op
);
4014 case KD_FONT_OP_SET_DEFAULT
:
4015 return con_font_default(vc
, op
);
4016 case KD_FONT_OP_COPY
:
4017 return con_font_copy(vc
, op
);
4023 * Interface exported to selection and vcs.
4026 /* used by selection */
4027 u16
screen_glyph(struct vc_data
*vc
, int offset
)
4029 u16 w
= scr_readw(screenpos(vc
, offset
, 1));
4032 if (w
& vc
->vc_hi_font_mask
)
4036 EXPORT_SYMBOL_GPL(screen_glyph
);
4038 /* used by vcs - note the word offset */
4039 unsigned short *screen_pos(struct vc_data
*vc
, int w_offset
, int viewed
)
4041 return screenpos(vc
, 2 * w_offset
, viewed
);
4044 void getconsxy(struct vc_data
*vc
, unsigned char *p
)
4050 void putconsxy(struct vc_data
*vc
, unsigned char *p
)
4053 gotoxy(vc
, p
[0], p
[1]);
4057 u16
vcs_scr_readw(struct vc_data
*vc
, const u16
*org
)
4059 if ((unsigned long)org
== vc
->vc_pos
&& softcursor_original
!= -1)
4060 return softcursor_original
;
4061 return scr_readw(org
);
4064 void vcs_scr_writew(struct vc_data
*vc
, u16 val
, u16
*org
)
4066 scr_writew(val
, org
);
4067 if ((unsigned long)org
== vc
->vc_pos
) {
4068 softcursor_original
= -1;
4074 * Visible symbols for modules
4077 EXPORT_SYMBOL(color_table
);
4078 EXPORT_SYMBOL(default_red
);
4079 EXPORT_SYMBOL(default_grn
);
4080 EXPORT_SYMBOL(default_blu
);
4081 EXPORT_SYMBOL(update_region
);
4082 EXPORT_SYMBOL(redraw_screen
);
4083 EXPORT_SYMBOL(vc_resize
);
4084 EXPORT_SYMBOL(fg_console
);
4085 EXPORT_SYMBOL(console_blank_hook
);
4086 EXPORT_SYMBOL(console_blanked
);
4087 EXPORT_SYMBOL(vc_cons
);
4088 #ifndef VT_SINGLE_DRIVER
4089 EXPORT_SYMBOL(take_over_console
);
4090 EXPORT_SYMBOL(give_up_console
);