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/smp_lock.h>
93 #include <linux/tiocl.h>
94 #include <linux/kbd_kern.h>
95 #include <linux/consolemap.h>
96 #include <linux/timer.h>
97 #include <linux/interrupt.h>
98 #include <linux/workqueue.h>
100 #include <linux/font.h>
101 #include <linux/bitops.h>
102 #include <linux/notifier.h>
103 #include <linux/device.h>
104 #include <linux/io.h>
105 #include <asm/system.h>
106 #include <linux/uaccess.h>
108 #define MAX_NR_CON_DRIVER 16
110 #define CON_DRIVER_FLAG_MODULE 1
111 #define CON_DRIVER_FLAG_INIT 2
112 #define CON_DRIVER_FLAG_ATTR 4
115 const struct consw
*con
;
124 static struct con_driver registered_con_driver
[MAX_NR_CON_DRIVER
];
125 const struct consw
*conswitchp
;
127 /* A bitmap for codes <32. A bit of 1 indicates that the code
128 * corresponding to that bit number invokes some special action
129 * (such as cursor movement) and should not be displayed as a
130 * glyph unless the disp_ctrl mode is explicitly enabled.
132 #define CTRL_ACTION 0x0d00ff81
133 #define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */
136 * Here is the default bell parameters: 750HZ, 1/8th of a second
138 #define DEFAULT_BELL_PITCH 750
139 #define DEFAULT_BELL_DURATION (HZ/8)
141 struct vc vc_cons
[MAX_NR_CONSOLES
];
143 #ifndef VT_SINGLE_DRIVER
144 static const struct consw
*con_driver_map
[MAX_NR_CONSOLES
];
147 static int con_open(struct tty_struct
*, struct file
*);
148 static void vc_init(struct vc_data
*vc
, unsigned int rows
,
149 unsigned int cols
, int do_clear
);
150 static void gotoxy(struct vc_data
*vc
, int new_x
, int new_y
);
151 static void save_cur(struct vc_data
*vc
);
152 static void reset_terminal(struct vc_data
*vc
, int do_clear
);
153 static void con_flush_chars(struct tty_struct
*tty
);
154 static int set_vesa_blanking(char __user
*p
);
155 static void set_cursor(struct vc_data
*vc
);
156 static void hide_cursor(struct vc_data
*vc
);
157 static void console_callback(struct work_struct
*ignored
);
158 static void blank_screen_t(unsigned long dummy
);
159 static void set_palette(struct vc_data
*vc
);
161 static int printable
; /* Is console ready for printing? */
162 int default_utf8
= true;
163 module_param(default_utf8
, int, S_IRUGO
| S_IWUSR
);
166 * ignore_poke: don't unblank the screen when things are typed. This is
167 * mainly for the privacy of braille terminal users.
169 static int ignore_poke
;
171 int do_poke_blanked_console
;
174 static int vesa_blank_mode
; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
175 static int vesa_off_interval
;
176 static int blankinterval
= 10*60;
177 core_param(consoleblank
, blankinterval
, int, 0444);
179 static DECLARE_WORK(console_work
, console_callback
);
182 * fg_console is the current virtual console,
183 * last_console is the last used one,
184 * want_console is the console we want to switch to,
185 * kmsg_redirect is the console for kernel messages,
189 int want_console
= -1;
193 * For each existing display, we have a pointer to console currently visible
194 * on that display, allowing consoles other than fg_console to be refreshed
195 * appropriately. Unless the low-level driver supplies its own display_fg
196 * variable, we use this one for the "master display".
198 static struct vc_data
*master_display_fg
;
201 * Unfortunately, we need to delay tty echo when we're currently writing to the
202 * console since the code is (and always was) not re-entrant, so we schedule
203 * all flip requests to process context with schedule-task() and run it from
204 * console_callback().
208 * For the same reason, we defer scrollback to the console callback.
210 static int scrollback_delta
;
213 * Hook so that the power management routines can (un)blank
214 * the console on our behalf.
216 int (*console_blank_hook
)(int);
218 static DEFINE_TIMER(console_timer
, blank_screen_t
, 0, 0);
219 static int blank_state
;
220 static int blank_timer_expired
;
228 * Notifier list for console events.
230 static ATOMIC_NOTIFIER_HEAD(vt_notifier_list
);
232 int register_vt_notifier(struct notifier_block
*nb
)
234 return atomic_notifier_chain_register(&vt_notifier_list
, nb
);
236 EXPORT_SYMBOL_GPL(register_vt_notifier
);
238 int unregister_vt_notifier(struct notifier_block
*nb
)
240 return atomic_notifier_chain_unregister(&vt_notifier_list
, nb
);
242 EXPORT_SYMBOL_GPL(unregister_vt_notifier
);
244 static void notify_write(struct vc_data
*vc
, unsigned int unicode
)
246 struct vt_notifier_param param
= { .vc
= vc
, unicode
= unicode
};
247 atomic_notifier_call_chain(&vt_notifier_list
, VT_WRITE
, ¶m
);
250 static void notify_update(struct vc_data
*vc
)
252 struct vt_notifier_param param
= { .vc
= vc
};
253 atomic_notifier_call_chain(&vt_notifier_list
, VT_UPDATE
, ¶m
);
257 * Low-Level Functions
260 #define IS_FG(vc) ((vc)->vc_num == fg_console)
262 #ifdef VT_BUF_VRAM_ONLY
263 #define DO_UPDATE(vc) 0
265 #define DO_UPDATE(vc) (CON_IS_VISIBLE(vc) && !console_blanked)
268 static inline unsigned short *screenpos(struct vc_data
*vc
, int offset
, int viewed
)
273 p
= (unsigned short *)(vc
->vc_origin
+ offset
);
274 else if (!vc
->vc_sw
->con_screen_pos
)
275 p
= (unsigned short *)(vc
->vc_visible_origin
+ offset
);
277 p
= vc
->vc_sw
->con_screen_pos(vc
, offset
);
281 static inline void scrolldelta(int lines
)
283 scrollback_delta
+= lines
;
284 schedule_console_callback();
287 void schedule_console_callback(void)
289 schedule_work(&console_work
);
292 static void scrup(struct vc_data
*vc
, unsigned int t
, unsigned int b
, int nr
)
294 unsigned short *d
, *s
;
298 if (b
> vc
->vc_rows
|| t
>= b
|| nr
< 1)
300 if (CON_IS_VISIBLE(vc
) && vc
->vc_sw
->con_scroll(vc
, t
, b
, SM_UP
, nr
))
302 d
= (unsigned short *)(vc
->vc_origin
+ vc
->vc_size_row
* t
);
303 s
= (unsigned short *)(vc
->vc_origin
+ vc
->vc_size_row
* (t
+ nr
));
304 scr_memmovew(d
, s
, (b
- t
- nr
) * vc
->vc_size_row
);
305 scr_memsetw(d
+ (b
- t
- nr
) * vc
->vc_cols
, vc
->vc_video_erase_char
,
306 vc
->vc_size_row
* nr
);
309 static void scrdown(struct vc_data
*vc
, unsigned int t
, unsigned int b
, int nr
)
316 if (b
> vc
->vc_rows
|| t
>= b
|| nr
< 1)
318 if (CON_IS_VISIBLE(vc
) && vc
->vc_sw
->con_scroll(vc
, t
, b
, SM_DOWN
, nr
))
320 s
= (unsigned short *)(vc
->vc_origin
+ vc
->vc_size_row
* t
);
321 step
= vc
->vc_cols
* nr
;
322 scr_memmovew(s
+ step
, s
, (b
- t
- nr
) * vc
->vc_size_row
);
323 scr_memsetw(s
, vc
->vc_video_erase_char
, 2 * step
);
326 static void do_update_region(struct vc_data
*vc
, unsigned long start
, int count
)
328 #ifndef VT_BUF_VRAM_ONLY
329 unsigned int xx
, yy
, offset
;
333 if (!vc
->vc_sw
->con_getxy
) {
334 offset
= (start
- vc
->vc_origin
) / 2;
335 xx
= offset
% vc
->vc_cols
;
336 yy
= offset
/ vc
->vc_cols
;
339 start
= vc
->vc_sw
->con_getxy(vc
, start
, &nxx
, &nyy
);
343 u16 attrib
= scr_readw(p
) & 0xff00;
346 while (xx
< vc
->vc_cols
&& count
) {
347 if (attrib
!= (scr_readw(p
) & 0xff00)) {
349 vc
->vc_sw
->con_putcs(vc
, q
, p
-q
, yy
, startx
);
352 attrib
= scr_readw(p
) & 0xff00;
359 vc
->vc_sw
->con_putcs(vc
, q
, p
-q
, yy
, startx
);
364 if (vc
->vc_sw
->con_getxy
) {
366 start
= vc
->vc_sw
->con_getxy(vc
, start
, NULL
, NULL
);
372 void update_region(struct vc_data
*vc
, unsigned long start
, int count
)
374 WARN_CONSOLE_UNLOCKED();
378 do_update_region(vc
, start
, count
);
383 /* Structure of attributes is hardware-dependent */
385 static u8
build_attr(struct vc_data
*vc
, u8 _color
, u8 _intensity
, u8 _blink
,
386 u8 _underline
, u8 _reverse
, u8 _italic
)
388 if (vc
->vc_sw
->con_build_attr
)
389 return vc
->vc_sw
->con_build_attr(vc
, _color
, _intensity
,
390 _blink
, _underline
, _reverse
, _italic
);
392 #ifndef VT_BUF_VRAM_ONLY
394 * ++roman: I completely changed the attribute format for monochrome
395 * mode (!can_do_color). The formerly used MDA (monochrome display
396 * adapter) format didn't allow the combination of certain effects.
397 * Now the attribute is just a bit vector:
398 * Bit 0..1: intensity (0..2)
405 if (!vc
->vc_can_do_color
)
408 (_underline
? 4 : 0) |
412 a
= (a
& 0xF0) | vc
->vc_itcolor
;
414 a
= (a
& 0xf0) | vc
->vc_ulcolor
;
415 else if (_intensity
== 0)
416 a
= (a
& 0xf0) | vc
->vc_ulcolor
;
418 a
= ((a
) & 0x88) | ((((a
) >> 4) | ((a
) << 4)) & 0x77);
423 if (vc
->vc_hi_font_mask
== 0x100)
432 static void update_attr(struct vc_data
*vc
)
434 vc
->vc_attr
= build_attr(vc
, vc
->vc_color
, vc
->vc_intensity
,
435 vc
->vc_blink
, vc
->vc_underline
,
436 vc
->vc_reverse
^ vc
->vc_decscnm
, vc
->vc_italic
);
437 vc
->vc_video_erase_char
= (build_attr(vc
, vc
->vc_color
, 1, vc
->vc_blink
, 0, vc
->vc_decscnm
, 0) << 8) | ' ';
440 /* Note: inverting the screen twice should revert to the original state */
441 void invert_screen(struct vc_data
*vc
, int offset
, int count
, int viewed
)
445 WARN_CONSOLE_UNLOCKED();
448 p
= screenpos(vc
, offset
, viewed
);
449 if (vc
->vc_sw
->con_invert_region
)
450 vc
->vc_sw
->con_invert_region(vc
, p
, count
);
451 #ifndef VT_BUF_VRAM_ONLY
457 if (!vc
->vc_can_do_color
) {
464 } else if (vc
->vc_hi_font_mask
== 0x100) {
467 a
= ((a
) & 0x11ff) | (((a
) & 0xe000) >> 4) | (((a
) & 0x0e00) << 4);
474 a
= ((a
) & 0x88ff) | (((a
) & 0x7000) >> 4) | (((a
) & 0x0700) << 4);
482 do_update_region(vc
, (unsigned long) p
, count
);
485 /* used by selection: complement pointer position */
486 void complement_pos(struct vc_data
*vc
, int offset
)
488 static int old_offset
= -1;
489 static unsigned short old
;
490 static unsigned short oldx
, oldy
;
492 WARN_CONSOLE_UNLOCKED();
494 if (old_offset
!= -1 && old_offset
>= 0 &&
495 old_offset
< vc
->vc_screenbuf_size
) {
496 scr_writew(old
, screenpos(vc
, old_offset
, 1));
498 vc
->vc_sw
->con_putc(vc
, old
, oldy
, oldx
);
503 if (offset
!= -1 && offset
>= 0 &&
504 offset
< vc
->vc_screenbuf_size
) {
507 p
= screenpos(vc
, offset
, 1);
509 new = old
^ vc
->vc_complement_mask
;
512 oldx
= (offset
>> 1) % vc
->vc_cols
;
513 oldy
= (offset
>> 1) / vc
->vc_cols
;
514 vc
->vc_sw
->con_putc(vc
, new, oldy
, oldx
);
520 static void insert_char(struct vc_data
*vc
, unsigned int nr
)
522 unsigned short *p
, *q
= (unsigned short *)vc
->vc_pos
;
524 p
= q
+ vc
->vc_cols
- nr
- vc
->vc_x
;
526 scr_writew(scr_readw(p
), p
+ nr
);
527 scr_memsetw(q
, vc
->vc_video_erase_char
, nr
* 2);
528 vc
->vc_need_wrap
= 0;
530 unsigned short oldattr
= vc
->vc_attr
;
531 vc
->vc_sw
->con_bmove(vc
, vc
->vc_y
, vc
->vc_x
, vc
->vc_y
, vc
->vc_x
+ nr
, 1,
532 vc
->vc_cols
- vc
->vc_x
- nr
);
533 vc
->vc_attr
= vc
->vc_video_erase_char
>> 8;
535 vc
->vc_sw
->con_putc(vc
, vc
->vc_video_erase_char
, vc
->vc_y
, vc
->vc_x
+ nr
);
536 vc
->vc_attr
= oldattr
;
540 static void delete_char(struct vc_data
*vc
, unsigned int nr
)
542 unsigned int i
= vc
->vc_x
;
543 unsigned short *p
= (unsigned short *)vc
->vc_pos
;
545 while (++i
<= vc
->vc_cols
- nr
) {
546 scr_writew(scr_readw(p
+nr
), p
);
549 scr_memsetw(p
, vc
->vc_video_erase_char
, nr
* 2);
550 vc
->vc_need_wrap
= 0;
552 unsigned short oldattr
= vc
->vc_attr
;
553 vc
->vc_sw
->con_bmove(vc
, vc
->vc_y
, vc
->vc_x
+ nr
, vc
->vc_y
, vc
->vc_x
, 1,
554 vc
->vc_cols
- vc
->vc_x
- nr
);
555 vc
->vc_attr
= vc
->vc_video_erase_char
>> 8;
557 vc
->vc_sw
->con_putc(vc
, vc
->vc_video_erase_char
, vc
->vc_y
,
558 vc
->vc_cols
- 1 - nr
);
559 vc
->vc_attr
= oldattr
;
563 static int softcursor_original
;
565 static void add_softcursor(struct vc_data
*vc
)
567 int i
= scr_readw((u16
*) vc
->vc_pos
);
568 u32 type
= vc
->vc_cursor_type
;
570 if (! (type
& 0x10)) return;
571 if (softcursor_original
!= -1) return;
572 softcursor_original
= i
;
573 i
|= ((type
>> 8) & 0xff00 );
574 i
^= ((type
) & 0xff00 );
575 if ((type
& 0x20) && ((softcursor_original
& 0x7000) == (i
& 0x7000))) i
^= 0x7000;
576 if ((type
& 0x40) && ((i
& 0x700) == ((i
& 0x7000) >> 4))) i
^= 0x0700;
577 scr_writew(i
, (u16
*) vc
->vc_pos
);
579 vc
->vc_sw
->con_putc(vc
, i
, vc
->vc_y
, vc
->vc_x
);
582 static void hide_softcursor(struct vc_data
*vc
)
584 if (softcursor_original
!= -1) {
585 scr_writew(softcursor_original
, (u16
*)vc
->vc_pos
);
587 vc
->vc_sw
->con_putc(vc
, softcursor_original
,
589 softcursor_original
= -1;
593 static void hide_cursor(struct vc_data
*vc
)
597 vc
->vc_sw
->con_cursor(vc
, CM_ERASE
);
601 static void set_cursor(struct vc_data
*vc
)
603 if (!IS_FG(vc
) || console_blanked
||
604 vc
->vc_mode
== KD_GRAPHICS
)
610 if ((vc
->vc_cursor_type
& 0x0f) != 1)
611 vc
->vc_sw
->con_cursor(vc
, CM_DRAW
);
616 static void set_origin(struct vc_data
*vc
)
618 WARN_CONSOLE_UNLOCKED();
620 if (!CON_IS_VISIBLE(vc
) ||
621 !vc
->vc_sw
->con_set_origin
||
622 !vc
->vc_sw
->con_set_origin(vc
))
623 vc
->vc_origin
= (unsigned long)vc
->vc_screenbuf
;
624 vc
->vc_visible_origin
= vc
->vc_origin
;
625 vc
->vc_scr_end
= vc
->vc_origin
+ vc
->vc_screenbuf_size
;
626 vc
->vc_pos
= vc
->vc_origin
+ vc
->vc_size_row
* vc
->vc_y
+ 2 * vc
->vc_x
;
629 static inline void save_screen(struct vc_data
*vc
)
631 WARN_CONSOLE_UNLOCKED();
633 if (vc
->vc_sw
->con_save_screen
)
634 vc
->vc_sw
->con_save_screen(vc
);
638 * Redrawing of screen
641 static void clear_buffer_attributes(struct vc_data
*vc
)
643 unsigned short *p
= (unsigned short *)vc
->vc_origin
;
644 int count
= vc
->vc_screenbuf_size
/ 2;
645 int mask
= vc
->vc_hi_font_mask
| 0xff;
647 for (; count
> 0; count
--, p
++) {
648 scr_writew((scr_readw(p
)&mask
) | (vc
->vc_video_erase_char
& ~mask
), p
);
652 void redraw_screen(struct vc_data
*vc
, int is_switch
)
656 WARN_CONSOLE_UNLOCKED();
660 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
665 struct vc_data
*old_vc
= vc_cons
[fg_console
].d
;
668 if (!CON_IS_VISIBLE(vc
))
670 *vc
->vc_display_fg
= vc
;
671 fg_console
= vc
->vc_num
;
673 if (!CON_IS_VISIBLE(old_vc
)) {
684 int old_was_color
= vc
->vc_can_do_color
;
687 update
= vc
->vc_sw
->con_switch(vc
);
690 * If console changed from mono<->color, the best we can do
691 * is to clear the buffer attributes. As it currently stands,
692 * rebuilding new attributes from the old buffer is not doable
693 * without overly complex code.
695 if (old_was_color
!= vc
->vc_can_do_color
) {
697 clear_buffer_attributes(vc
);
699 if (update
&& vc
->vc_mode
!= KD_GRAPHICS
)
700 do_update_region(vc
, vc
->vc_origin
, vc
->vc_screenbuf_size
/ 2);
705 compute_shiftstate();
711 * Allocation, freeing and resizing of VTs.
714 int vc_cons_allocated(unsigned int i
)
716 return (i
< MAX_NR_CONSOLES
&& vc_cons
[i
].d
);
719 static void visual_init(struct vc_data
*vc
, int num
, int init
)
721 /* ++Geert: vc->vc_sw->con_init determines console size */
723 module_put(vc
->vc_sw
->owner
);
724 vc
->vc_sw
= conswitchp
;
725 #ifndef VT_SINGLE_DRIVER
726 if (con_driver_map
[num
])
727 vc
->vc_sw
= con_driver_map
[num
];
729 __module_get(vc
->vc_sw
->owner
);
731 vc
->vc_display_fg
= &master_display_fg
;
732 vc
->vc_uni_pagedir_loc
= &vc
->vc_uni_pagedir
;
733 vc
->vc_uni_pagedir
= 0;
734 vc
->vc_hi_font_mask
= 0;
735 vc
->vc_complement_mask
= 0;
736 vc
->vc_can_do_color
= 0;
737 vc
->vc_sw
->con_init(vc
, init
);
738 if (!vc
->vc_complement_mask
)
739 vc
->vc_complement_mask
= vc
->vc_can_do_color
? 0x7700 : 0x0800;
740 vc
->vc_s_complement_mask
= vc
->vc_complement_mask
;
741 vc
->vc_size_row
= vc
->vc_cols
<< 1;
742 vc
->vc_screenbuf_size
= vc
->vc_rows
* vc
->vc_size_row
;
745 int vc_allocate(unsigned int currcons
) /* return 0 on success */
747 WARN_CONSOLE_UNLOCKED();
749 if (currcons
>= MAX_NR_CONSOLES
)
751 if (!vc_cons
[currcons
].d
) {
753 struct vt_notifier_param param
;
755 /* prevent users from taking too much memory */
756 if (currcons
>= MAX_NR_USER_CONSOLES
&& !capable(CAP_SYS_RESOURCE
))
759 /* due to the granularity of kmalloc, we waste some memory here */
760 /* the alloc is done in two steps, to optimize the common situation
761 of a 25x80 console (structsize=216, screenbuf_size=4000) */
762 /* although the numbers above are not valid since long ago, the
763 point is still up-to-date and the comment still has its value
764 even if only as a historical artifact. --mj, July 1998 */
765 param
.vc
= vc
= kzalloc(sizeof(struct vc_data
), GFP_KERNEL
);
768 vc_cons
[currcons
].d
= vc
;
769 INIT_WORK(&vc_cons
[currcons
].SAK_work
, vc_SAK
);
770 visual_init(vc
, currcons
, 1);
771 if (!*vc
->vc_uni_pagedir_loc
)
772 con_set_default_unimap(vc
);
773 if (!vc
->vc_kmalloced
)
774 vc
->vc_screenbuf
= kmalloc(vc
->vc_screenbuf_size
, GFP_KERNEL
);
775 if (!vc
->vc_screenbuf
) {
777 vc_cons
[currcons
].d
= NULL
;
780 vc
->vc_kmalloced
= 1;
781 vc_init(vc
, vc
->vc_rows
, vc
->vc_cols
, 1);
782 vcs_make_sysfs(currcons
);
783 atomic_notifier_call_chain(&vt_notifier_list
, VT_ALLOCATE
, ¶m
);
788 static inline int resize_screen(struct vc_data
*vc
, int width
, int height
,
791 /* Resizes the resolution of the display adapater */
794 if (vc
->vc_mode
!= KD_GRAPHICS
&& vc
->vc_sw
->con_resize
)
795 err
= vc
->vc_sw
->con_resize(vc
, width
, height
, user
);
801 * Change # of rows and columns (0 means unchanged/the size of fg_console)
802 * [this is to be used together with some user program
803 * like resize that changes the hardware videomode]
805 #define VC_RESIZE_MAXCOL (32767)
806 #define VC_RESIZE_MAXROW (32767)
809 * vc_do_resize - resizing method for the tty
810 * @tty: tty being resized
811 * @real_tty: real tty (different to tty if a pty/tty pair)
812 * @vc: virtual console private data
816 * Resize a virtual console, clipping according to the actual constraints.
817 * If the caller passes a tty structure then update the termios winsize
818 * information and perform any neccessary signal handling.
820 * Caller must hold the console semaphore. Takes the termios mutex and
821 * ctrl_lock of the tty IFF a tty is passed.
824 static int vc_do_resize(struct tty_struct
*tty
, struct vc_data
*vc
,
825 unsigned int cols
, unsigned int lines
)
827 unsigned long old_origin
, new_origin
, new_scr_end
, rlth
, rrem
, err
= 0;
828 unsigned int old_cols
, old_rows
, old_row_size
, old_screen_size
;
829 unsigned int new_cols
, new_rows
, new_row_size
, new_screen_size
;
830 unsigned int end
, user
;
831 unsigned short *newscreen
;
833 WARN_CONSOLE_UNLOCKED();
838 user
= vc
->vc_resize_user
;
839 vc
->vc_resize_user
= 0;
841 if (cols
> VC_RESIZE_MAXCOL
|| lines
> VC_RESIZE_MAXROW
)
844 new_cols
= (cols
? cols
: vc
->vc_cols
);
845 new_rows
= (lines
? lines
: vc
->vc_rows
);
846 new_row_size
= new_cols
<< 1;
847 new_screen_size
= new_row_size
* new_rows
;
849 if (new_cols
== vc
->vc_cols
&& new_rows
== vc
->vc_rows
)
852 newscreen
= kmalloc(new_screen_size
, GFP_USER
);
856 old_rows
= vc
->vc_rows
;
857 old_cols
= vc
->vc_cols
;
858 old_row_size
= vc
->vc_size_row
;
859 old_screen_size
= vc
->vc_screenbuf_size
;
861 err
= resize_screen(vc
, new_cols
, new_rows
, user
);
867 vc
->vc_rows
= new_rows
;
868 vc
->vc_cols
= new_cols
;
869 vc
->vc_size_row
= new_row_size
;
870 vc
->vc_screenbuf_size
= new_screen_size
;
872 rlth
= min(old_row_size
, new_row_size
);
873 rrem
= new_row_size
- rlth
;
874 old_origin
= vc
->vc_origin
;
875 new_origin
= (long) newscreen
;
876 new_scr_end
= new_origin
+ new_screen_size
;
878 if (vc
->vc_y
> new_rows
) {
879 if (old_rows
- vc
->vc_y
< new_rows
) {
881 * Cursor near the bottom, copy contents from the
884 old_origin
+= (old_rows
- new_rows
) * old_row_size
;
885 end
= vc
->vc_scr_end
;
888 * Cursor is in no man's land, copy 1/2 screenful
889 * from the top and bottom of cursor position
891 old_origin
+= (vc
->vc_y
- new_rows
/2) * old_row_size
;
892 end
= old_origin
+ (old_row_size
* new_rows
);
896 * Cursor near the top, copy contents from the top of buffer
898 end
= (old_rows
> new_rows
) ? old_origin
+
899 (old_row_size
* new_rows
) :
904 while (old_origin
< end
) {
905 scr_memcpyw((unsigned short *) new_origin
,
906 (unsigned short *) old_origin
, rlth
);
908 scr_memsetw((void *)(new_origin
+ rlth
),
909 vc
->vc_video_erase_char
, rrem
);
910 old_origin
+= old_row_size
;
911 new_origin
+= new_row_size
;
913 if (new_scr_end
> new_origin
)
914 scr_memsetw((void *)new_origin
, vc
->vc_video_erase_char
,
915 new_scr_end
- new_origin
);
916 if (vc
->vc_kmalloced
)
917 kfree(vc
->vc_screenbuf
);
918 vc
->vc_screenbuf
= newscreen
;
919 vc
->vc_kmalloced
= 1;
920 vc
->vc_screenbuf_size
= new_screen_size
;
923 /* do part of a reset_terminal() */
925 vc
->vc_bottom
= vc
->vc_rows
;
926 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
);
930 /* Rewrite the requested winsize data with the actual
933 memset(&ws
, 0, sizeof(ws
));
934 ws
.ws_row
= vc
->vc_rows
;
935 ws
.ws_col
= vc
->vc_cols
;
936 ws
.ws_ypixel
= vc
->vc_scan_lines
;
937 tty_do_resize(tty
, &ws
);
940 if (CON_IS_VISIBLE(vc
))
946 * vc_resize - resize a VT
947 * @vc: virtual console
951 * Resize a virtual console as seen from the console end of things. We
952 * use the common vc_do_resize methods to update the structures. The
953 * caller must hold the console sem to protect console internals and
957 int vc_resize(struct vc_data
*vc
, unsigned int cols
, unsigned int rows
)
959 return vc_do_resize(vc
->vc_tty
, vc
, cols
, rows
);
963 * vt_resize - resize a VT
964 * @tty: tty to resize
965 * @ws: winsize attributes
967 * Resize a virtual terminal. This is called by the tty layer as we
968 * register our own handler for resizing. The mutual helper does all
971 * Takes the console sem and the called methods then take the tty
972 * termios_mutex and the tty ctrl_lock in that order.
974 static int vt_resize(struct tty_struct
*tty
, struct winsize
*ws
)
976 struct vc_data
*vc
= tty
->driver_data
;
979 acquire_console_sem();
980 ret
= vc_do_resize(tty
, vc
, ws
->ws_col
, ws
->ws_row
);
981 release_console_sem();
985 void vc_deallocate(unsigned int currcons
)
987 WARN_CONSOLE_UNLOCKED();
989 if (vc_cons_allocated(currcons
)) {
990 struct vc_data
*vc
= vc_cons
[currcons
].d
;
991 struct vt_notifier_param param
= { .vc
= vc
};
993 atomic_notifier_call_chain(&vt_notifier_list
, VT_DEALLOCATE
, ¶m
);
994 vcs_remove_sysfs(currcons
);
995 vc
->vc_sw
->con_deinit(vc
);
997 module_put(vc
->vc_sw
->owner
);
998 if (vc
->vc_kmalloced
)
999 kfree(vc
->vc_screenbuf
);
1000 if (currcons
>= MIN_NR_CONSOLES
)
1002 vc_cons
[currcons
].d
= NULL
;
1010 #define set_kbd(vc, x) set_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1011 #define clr_kbd(vc, x) clr_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1012 #define is_kbd(vc, x) vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1014 #define decarm VC_REPEAT
1015 #define decckm VC_CKMODE
1016 #define kbdapplic VC_APPLIC
1020 * this is what the terminal answers to a ESC-Z or csi0c query.
1022 #define VT100ID "\033[?1;2c"
1023 #define VT102ID "\033[?6c"
1025 unsigned char color_table
[] = { 0, 4, 2, 6, 1, 5, 3, 7,
1026 8,12,10,14, 9,13,11,15 };
1028 /* the default colour table, for VGA+ colour systems */
1029 int default_red
[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
1030 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
1031 int default_grn
[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
1032 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
1033 int default_blu
[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
1034 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
1036 module_param_array(default_red
, int, NULL
, S_IRUGO
| S_IWUSR
);
1037 module_param_array(default_grn
, int, NULL
, S_IRUGO
| S_IWUSR
);
1038 module_param_array(default_blu
, int, NULL
, S_IRUGO
| S_IWUSR
);
1041 * gotoxy() must verify all boundaries, because the arguments
1042 * might also be negative. If the given position is out of
1043 * bounds, the cursor is placed at the nearest margin.
1045 static void gotoxy(struct vc_data
*vc
, int new_x
, int new_y
)
1052 if (new_x
>= vc
->vc_cols
)
1053 vc
->vc_x
= vc
->vc_cols
- 1;
1060 max_y
= vc
->vc_bottom
;
1063 max_y
= vc
->vc_rows
;
1067 else if (new_y
>= max_y
)
1068 vc
->vc_y
= max_y
- 1;
1071 vc
->vc_pos
= vc
->vc_origin
+ vc
->vc_y
* vc
->vc_size_row
+ (vc
->vc_x
<<1);
1072 vc
->vc_need_wrap
= 0;
1075 /* for absolute user moves, when decom is set */
1076 static void gotoxay(struct vc_data
*vc
, int new_x
, int new_y
)
1078 gotoxy(vc
, new_x
, vc
->vc_decom
? (vc
->vc_top
+ new_y
) : new_y
);
1081 void scrollback(struct vc_data
*vc
, int lines
)
1084 lines
= vc
->vc_rows
/ 2;
1085 scrolldelta(-lines
);
1088 void scrollfront(struct vc_data
*vc
, int lines
)
1091 lines
= vc
->vc_rows
/ 2;
1095 static void lf(struct vc_data
*vc
)
1097 /* don't scroll if above bottom of scrolling region, or
1098 * if below scrolling region
1100 if (vc
->vc_y
+ 1 == vc
->vc_bottom
)
1101 scrup(vc
, vc
->vc_top
, vc
->vc_bottom
, 1);
1102 else if (vc
->vc_y
< vc
->vc_rows
- 1) {
1104 vc
->vc_pos
+= vc
->vc_size_row
;
1106 vc
->vc_need_wrap
= 0;
1107 notify_write(vc
, '\n');
1110 static void ri(struct vc_data
*vc
)
1112 /* don't scroll if below top of scrolling region, or
1113 * if above scrolling region
1115 if (vc
->vc_y
== vc
->vc_top
)
1116 scrdown(vc
, vc
->vc_top
, vc
->vc_bottom
, 1);
1117 else if (vc
->vc_y
> 0) {
1119 vc
->vc_pos
-= vc
->vc_size_row
;
1121 vc
->vc_need_wrap
= 0;
1124 static inline void cr(struct vc_data
*vc
)
1126 vc
->vc_pos
-= vc
->vc_x
<< 1;
1127 vc
->vc_need_wrap
= vc
->vc_x
= 0;
1128 notify_write(vc
, '\r');
1131 static inline void bs(struct vc_data
*vc
)
1136 vc
->vc_need_wrap
= 0;
1137 notify_write(vc
, '\b');
1141 static inline void del(struct vc_data
*vc
)
1146 static void csi_J(struct vc_data
*vc
, int vpar
)
1149 unsigned short * start
;
1152 case 0: /* erase from cursor to end of display */
1153 count
= (vc
->vc_scr_end
- vc
->vc_pos
) >> 1;
1154 start
= (unsigned short *)vc
->vc_pos
;
1155 if (DO_UPDATE(vc
)) {
1156 /* do in two stages */
1157 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, vc
->vc_x
, 1,
1158 vc
->vc_cols
- vc
->vc_x
);
1159 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
+ 1, 0,
1160 vc
->vc_rows
- vc
->vc_y
- 1,
1164 case 1: /* erase from start to cursor */
1165 count
= ((vc
->vc_pos
- vc
->vc_origin
) >> 1) + 1;
1166 start
= (unsigned short *)vc
->vc_origin
;
1167 if (DO_UPDATE(vc
)) {
1168 /* do in two stages */
1169 vc
->vc_sw
->con_clear(vc
, 0, 0, vc
->vc_y
,
1171 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, 0, 1,
1175 case 2: /* erase whole display */
1176 count
= vc
->vc_cols
* vc
->vc_rows
;
1177 start
= (unsigned short *)vc
->vc_origin
;
1179 vc
->vc_sw
->con_clear(vc
, 0, 0,
1186 scr_memsetw(start
, vc
->vc_video_erase_char
, 2 * count
);
1187 vc
->vc_need_wrap
= 0;
1190 static void csi_K(struct vc_data
*vc
, int vpar
)
1193 unsigned short * start
;
1196 case 0: /* erase from cursor to end of line */
1197 count
= vc
->vc_cols
- vc
->vc_x
;
1198 start
= (unsigned short *)vc
->vc_pos
;
1200 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, vc
->vc_x
, 1,
1201 vc
->vc_cols
- vc
->vc_x
);
1203 case 1: /* erase from start of line to cursor */
1204 start
= (unsigned short *)(vc
->vc_pos
- (vc
->vc_x
<< 1));
1205 count
= vc
->vc_x
+ 1;
1207 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, 0, 1,
1210 case 2: /* erase whole line */
1211 start
= (unsigned short *)(vc
->vc_pos
- (vc
->vc_x
<< 1));
1212 count
= vc
->vc_cols
;
1214 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, 0, 1,
1220 scr_memsetw(start
, vc
->vc_video_erase_char
, 2 * count
);
1221 vc
->vc_need_wrap
= 0;
1224 static void csi_X(struct vc_data
*vc
, int vpar
) /* erase the following vpar positions */
1230 count
= (vpar
> vc
->vc_cols
- vc
->vc_x
) ? (vc
->vc_cols
- vc
->vc_x
) : vpar
;
1232 scr_memsetw((unsigned short *)vc
->vc_pos
, vc
->vc_video_erase_char
, 2 * count
);
1234 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, vc
->vc_x
, 1, count
);
1235 vc
->vc_need_wrap
= 0;
1238 static void default_attr(struct vc_data
*vc
)
1240 vc
->vc_intensity
= 1;
1242 vc
->vc_underline
= 0;
1245 vc
->vc_color
= vc
->vc_def_color
;
1248 /* console_sem is held */
1249 static void csi_m(struct vc_data
*vc
)
1253 for (i
= 0; i
<= vc
->vc_npar
; i
++)
1254 switch (vc
->vc_par
[i
]) {
1255 case 0: /* all attributes off */
1259 vc
->vc_intensity
= 2;
1262 vc
->vc_intensity
= 0;
1268 vc
->vc_underline
= 1;
1276 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1277 * Select primary font, don't display
1278 * control chars if defined, don't set
1281 vc
->vc_translate
= set_translate(vc
->vc_charset
== 0
1283 : vc
->vc_G1_charset
, vc
);
1284 vc
->vc_disp_ctrl
= 0;
1285 vc
->vc_toggle_meta
= 0;
1287 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1288 * Select first alternate font, lets
1289 * chars < 32 be displayed as ROM chars.
1291 vc
->vc_translate
= set_translate(IBMPC_MAP
, vc
);
1292 vc
->vc_disp_ctrl
= 1;
1293 vc
->vc_toggle_meta
= 0;
1295 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1296 * Select second alternate font, toggle
1297 * high bit before displaying as ROM char.
1299 vc
->vc_translate
= set_translate(IBMPC_MAP
, vc
);
1300 vc
->vc_disp_ctrl
= 1;
1301 vc
->vc_toggle_meta
= 1;
1305 vc
->vc_intensity
= 1;
1311 vc
->vc_underline
= 0;
1319 case 38: /* ANSI X3.64-1979 (SCO-ish?)
1320 * Enables underscore, white foreground
1321 * with white underscore (Linux - use
1322 * default foreground).
1324 vc
->vc_color
= (vc
->vc_def_color
& 0x0f) | (vc
->vc_color
& 0xf0);
1325 vc
->vc_underline
= 1;
1327 case 39: /* ANSI X3.64-1979 (SCO-ish?)
1328 * Disable underline option.
1329 * Reset colour to default? It did this
1332 vc
->vc_color
= (vc
->vc_def_color
& 0x0f) | (vc
->vc_color
& 0xf0);
1333 vc
->vc_underline
= 0;
1336 vc
->vc_color
= (vc
->vc_def_color
& 0xf0) | (vc
->vc_color
& 0x0f);
1339 if (vc
->vc_par
[i
] >= 30 && vc
->vc_par
[i
] <= 37)
1340 vc
->vc_color
= color_table
[vc
->vc_par
[i
] - 30]
1341 | (vc
->vc_color
& 0xf0);
1342 else if (vc
->vc_par
[i
] >= 40 && vc
->vc_par
[i
] <= 47)
1343 vc
->vc_color
= (color_table
[vc
->vc_par
[i
] - 40] << 4)
1344 | (vc
->vc_color
& 0x0f);
1350 static void respond_string(const char *p
, struct tty_struct
*tty
)
1353 tty_insert_flip_char(tty
, *p
, 0);
1356 con_schedule_flip(tty
);
1359 static void cursor_report(struct vc_data
*vc
, struct tty_struct
*tty
)
1363 sprintf(buf
, "\033[%d;%dR", vc
->vc_y
+ (vc
->vc_decom
? vc
->vc_top
+ 1 : 1), vc
->vc_x
+ 1);
1364 respond_string(buf
, tty
);
1367 static inline void status_report(struct tty_struct
*tty
)
1369 respond_string("\033[0n", tty
); /* Terminal ok */
1372 static inline void respond_ID(struct tty_struct
* tty
)
1374 respond_string(VT102ID
, tty
);
1377 void mouse_report(struct tty_struct
*tty
, int butt
, int mrx
, int mry
)
1381 sprintf(buf
, "\033[M%c%c%c", (char)(' ' + butt
), (char)('!' + mrx
),
1383 respond_string(buf
, tty
);
1386 /* invoked via ioctl(TIOCLINUX) and through set_selection */
1387 int mouse_reporting(void)
1389 return vc_cons
[fg_console
].d
->vc_report_mouse
;
1392 /* console_sem is held */
1393 static void set_mode(struct vc_data
*vc
, int on_off
)
1397 for (i
= 0; i
<= vc
->vc_npar
; i
++)
1399 switch(vc
->vc_par
[i
]) { /* DEC private modes set/reset */
1400 case 1: /* Cursor keys send ^[Ox/^[[x */
1402 set_kbd(vc
, decckm
);
1404 clr_kbd(vc
, decckm
);
1406 case 3: /* 80/132 mode switch unimplemented */
1407 vc
->vc_deccolm
= on_off
;
1409 vc_resize(deccolm
? 132 : 80, vc
->vc_rows
);
1410 /* this alone does not suffice; some user mode
1411 utility has to change the hardware regs */
1414 case 5: /* Inverted screen on/off */
1415 if (vc
->vc_decscnm
!= on_off
) {
1416 vc
->vc_decscnm
= on_off
;
1417 invert_screen(vc
, 0, vc
->vc_screenbuf_size
, 0);
1421 case 6: /* Origin relative/absolute */
1422 vc
->vc_decom
= on_off
;
1425 case 7: /* Autowrap on/off */
1426 vc
->vc_decawm
= on_off
;
1428 case 8: /* Autorepeat on/off */
1430 set_kbd(vc
, decarm
);
1432 clr_kbd(vc
, decarm
);
1435 vc
->vc_report_mouse
= on_off
? 1 : 0;
1437 case 25: /* Cursor on/off */
1438 vc
->vc_deccm
= on_off
;
1441 vc
->vc_report_mouse
= on_off
? 2 : 0;
1445 switch(vc
->vc_par
[i
]) { /* ANSI modes set/reset */
1446 case 3: /* Monitor (display ctrls) */
1447 vc
->vc_disp_ctrl
= on_off
;
1449 case 4: /* Insert Mode on/off */
1450 vc
->vc_decim
= on_off
;
1452 case 20: /* Lf, Enter == CrLf/Lf */
1462 /* console_sem is held */
1463 static void setterm_command(struct vc_data
*vc
)
1465 switch(vc
->vc_par
[0]) {
1466 case 1: /* set color for underline mode */
1467 if (vc
->vc_can_do_color
&&
1468 vc
->vc_par
[1] < 16) {
1469 vc
->vc_ulcolor
= color_table
[vc
->vc_par
[1]];
1470 if (vc
->vc_underline
)
1474 case 2: /* set color for half intensity mode */
1475 if (vc
->vc_can_do_color
&&
1476 vc
->vc_par
[1] < 16) {
1477 vc
->vc_halfcolor
= color_table
[vc
->vc_par
[1]];
1478 if (vc
->vc_intensity
== 0)
1482 case 8: /* store colors as defaults */
1483 vc
->vc_def_color
= vc
->vc_attr
;
1484 if (vc
->vc_hi_font_mask
== 0x100)
1485 vc
->vc_def_color
>>= 1;
1489 case 9: /* set blanking interval */
1490 blankinterval
= ((vc
->vc_par
[1] < 60) ? vc
->vc_par
[1] : 60) * 60;
1491 poke_blanked_console();
1493 case 10: /* set bell frequency in Hz */
1494 if (vc
->vc_npar
>= 1)
1495 vc
->vc_bell_pitch
= vc
->vc_par
[1];
1497 vc
->vc_bell_pitch
= DEFAULT_BELL_PITCH
;
1499 case 11: /* set bell duration in msec */
1500 if (vc
->vc_npar
>= 1)
1501 vc
->vc_bell_duration
= (vc
->vc_par
[1] < 2000) ?
1502 vc
->vc_par
[1] * HZ
/ 1000 : 0;
1504 vc
->vc_bell_duration
= DEFAULT_BELL_DURATION
;
1506 case 12: /* bring specified console to the front */
1507 if (vc
->vc_par
[1] >= 1 && vc_cons_allocated(vc
->vc_par
[1] - 1))
1508 set_console(vc
->vc_par
[1] - 1);
1510 case 13: /* unblank the screen */
1511 poke_blanked_console();
1513 case 14: /* set vesa powerdown interval */
1514 vesa_off_interval
= ((vc
->vc_par
[1] < 60) ? vc
->vc_par
[1] : 60) * 60 * HZ
;
1516 case 15: /* activate the previous console */
1517 set_console(last_console
);
1522 /* console_sem is held */
1523 static void csi_at(struct vc_data
*vc
, unsigned int nr
)
1525 if (nr
> vc
->vc_cols
- vc
->vc_x
)
1526 nr
= vc
->vc_cols
- vc
->vc_x
;
1529 insert_char(vc
, nr
);
1532 /* console_sem is held */
1533 static void csi_L(struct vc_data
*vc
, unsigned int nr
)
1535 if (nr
> vc
->vc_rows
- vc
->vc_y
)
1536 nr
= vc
->vc_rows
- vc
->vc_y
;
1539 scrdown(vc
, vc
->vc_y
, vc
->vc_bottom
, nr
);
1540 vc
->vc_need_wrap
= 0;
1543 /* console_sem is held */
1544 static void csi_P(struct vc_data
*vc
, unsigned int nr
)
1546 if (nr
> vc
->vc_cols
- vc
->vc_x
)
1547 nr
= vc
->vc_cols
- vc
->vc_x
;
1550 delete_char(vc
, nr
);
1553 /* console_sem is held */
1554 static void csi_M(struct vc_data
*vc
, unsigned int nr
)
1556 if (nr
> vc
->vc_rows
- vc
->vc_y
)
1557 nr
= vc
->vc_rows
- vc
->vc_y
;
1560 scrup(vc
, vc
->vc_y
, vc
->vc_bottom
, nr
);
1561 vc
->vc_need_wrap
= 0;
1564 /* console_sem is held (except via vc_init->reset_terminal */
1565 static void save_cur(struct vc_data
*vc
)
1567 vc
->vc_saved_x
= vc
->vc_x
;
1568 vc
->vc_saved_y
= vc
->vc_y
;
1569 vc
->vc_s_intensity
= vc
->vc_intensity
;
1570 vc
->vc_s_italic
= vc
->vc_italic
;
1571 vc
->vc_s_underline
= vc
->vc_underline
;
1572 vc
->vc_s_blink
= vc
->vc_blink
;
1573 vc
->vc_s_reverse
= vc
->vc_reverse
;
1574 vc
->vc_s_charset
= vc
->vc_charset
;
1575 vc
->vc_s_color
= vc
->vc_color
;
1576 vc
->vc_saved_G0
= vc
->vc_G0_charset
;
1577 vc
->vc_saved_G1
= vc
->vc_G1_charset
;
1580 /* console_sem is held */
1581 static void restore_cur(struct vc_data
*vc
)
1583 gotoxy(vc
, vc
->vc_saved_x
, vc
->vc_saved_y
);
1584 vc
->vc_intensity
= vc
->vc_s_intensity
;
1585 vc
->vc_italic
= vc
->vc_s_italic
;
1586 vc
->vc_underline
= vc
->vc_s_underline
;
1587 vc
->vc_blink
= vc
->vc_s_blink
;
1588 vc
->vc_reverse
= vc
->vc_s_reverse
;
1589 vc
->vc_charset
= vc
->vc_s_charset
;
1590 vc
->vc_color
= vc
->vc_s_color
;
1591 vc
->vc_G0_charset
= vc
->vc_saved_G0
;
1592 vc
->vc_G1_charset
= vc
->vc_saved_G1
;
1593 vc
->vc_translate
= set_translate(vc
->vc_charset
? vc
->vc_G1_charset
: vc
->vc_G0_charset
, vc
);
1595 vc
->vc_need_wrap
= 0;
1598 enum { ESnormal
, ESesc
, ESsquare
, ESgetpars
, ESgotpars
, ESfunckey
,
1599 EShash
, ESsetG0
, ESsetG1
, ESpercent
, ESignore
, ESnonstd
,
1602 /* console_sem is held (except via vc_init()) */
1603 static void reset_terminal(struct vc_data
*vc
, int do_clear
)
1606 vc
->vc_bottom
= vc
->vc_rows
;
1607 vc
->vc_state
= ESnormal
;
1609 vc
->vc_translate
= set_translate(LAT1_MAP
, vc
);
1610 vc
->vc_G0_charset
= LAT1_MAP
;
1611 vc
->vc_G1_charset
= GRAF_MAP
;
1613 vc
->vc_need_wrap
= 0;
1614 vc
->vc_report_mouse
= 0;
1615 vc
->vc_utf
= default_utf8
;
1616 vc
->vc_utf_count
= 0;
1618 vc
->vc_disp_ctrl
= 0;
1619 vc
->vc_toggle_meta
= 0;
1627 set_kbd(vc
, decarm
);
1628 clr_kbd(vc
, decckm
);
1629 clr_kbd(vc
, kbdapplic
);
1631 kbd_table
[vc
->vc_num
].lockstate
= 0;
1632 kbd_table
[vc
->vc_num
].slockstate
= 0;
1633 kbd_table
[vc
->vc_num
].ledmode
= LED_SHOW_FLAGS
;
1634 kbd_table
[vc
->vc_num
].ledflagstate
= kbd_table
[vc
->vc_num
].default_ledflagstate
;
1635 /* do not do set_leds here because this causes an endless tasklet loop
1636 when the keyboard hasn't been initialized yet */
1638 vc
->vc_cursor_type
= CUR_DEFAULT
;
1639 vc
->vc_complement_mask
= vc
->vc_s_complement_mask
;
1644 vc
->vc_tab_stop
[0] = 0x01010100;
1645 vc
->vc_tab_stop
[1] =
1646 vc
->vc_tab_stop
[2] =
1647 vc
->vc_tab_stop
[3] =
1648 vc
->vc_tab_stop
[4] =
1649 vc
->vc_tab_stop
[5] =
1650 vc
->vc_tab_stop
[6] =
1651 vc
->vc_tab_stop
[7] = 0x01010101;
1653 vc
->vc_bell_pitch
= DEFAULT_BELL_PITCH
;
1654 vc
->vc_bell_duration
= DEFAULT_BELL_DURATION
;
1662 /* console_sem is held */
1663 static void do_con_trol(struct tty_struct
*tty
, struct vc_data
*vc
, int c
)
1666 * Control characters can be used in the _middle_
1667 * of an escape sequence.
1673 if (vc
->vc_bell_duration
)
1674 kd_mksound(vc
->vc_bell_pitch
, vc
->vc_bell_duration
);
1680 vc
->vc_pos
-= (vc
->vc_x
<< 1);
1681 while (vc
->vc_x
< vc
->vc_cols
- 1) {
1683 if (vc
->vc_tab_stop
[vc
->vc_x
>> 5] & (1 << (vc
->vc_x
& 31)))
1686 vc
->vc_pos
+= (vc
->vc_x
<< 1);
1687 notify_write(vc
, '\t');
1689 case 10: case 11: case 12:
1691 if (!is_kbd(vc
, lnm
))
1698 vc
->vc_translate
= set_translate(vc
->vc_G1_charset
, vc
);
1699 vc
->vc_disp_ctrl
= 1;
1703 vc
->vc_translate
= set_translate(vc
->vc_G0_charset
, vc
);
1704 vc
->vc_disp_ctrl
= 0;
1707 vc
->vc_state
= ESnormal
;
1710 vc
->vc_state
= ESesc
;
1716 vc
->vc_state
= ESsquare
;
1719 switch(vc
->vc_state
) {
1721 vc
->vc_state
= ESnormal
;
1724 vc
->vc_state
= ESsquare
;
1727 vc
->vc_state
= ESnonstd
;
1730 vc
->vc_state
= ESpercent
;
1743 vc
->vc_tab_stop
[vc
->vc_x
>> 5] |= (1 << (vc
->vc_x
& 31));
1755 vc
->vc_state
= ESsetG0
;
1758 vc
->vc_state
= ESsetG1
;
1761 vc
->vc_state
= EShash
;
1764 reset_terminal(vc
, 1);
1766 case '>': /* Numeric keypad */
1767 clr_kbd(vc
, kbdapplic
);
1769 case '=': /* Appl. keypad */
1770 set_kbd(vc
, kbdapplic
);
1775 if (c
=='P') { /* palette escape sequence */
1776 for (vc
->vc_npar
= 0; vc
->vc_npar
< NPAR
; vc
->vc_npar
++)
1777 vc
->vc_par
[vc
->vc_npar
] = 0;
1779 vc
->vc_state
= ESpalette
;
1781 } else if (c
=='R') { /* reset palette */
1783 vc
->vc_state
= ESnormal
;
1785 vc
->vc_state
= ESnormal
;
1788 if ( (c
>='0'&&c
<='9') || (c
>='A'&&c
<='F') || (c
>='a'&&c
<='f') ) {
1789 vc
->vc_par
[vc
->vc_npar
++] = (c
> '9' ? (c
& 0xDF) - 'A' + 10 : c
- '0');
1790 if (vc
->vc_npar
== 7) {
1791 int i
= vc
->vc_par
[0] * 3, j
= 1;
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
++];
1796 vc
->vc_palette
[i
] = 16 * vc
->vc_par
[j
++];
1797 vc
->vc_palette
[i
] += vc
->vc_par
[j
];
1799 vc
->vc_state
= ESnormal
;
1802 vc
->vc_state
= ESnormal
;
1805 for (vc
->vc_npar
= 0; vc
->vc_npar
< NPAR
; vc
->vc_npar
++)
1806 vc
->vc_par
[vc
->vc_npar
] = 0;
1808 vc
->vc_state
= ESgetpars
;
1809 if (c
== '[') { /* Function key */
1810 vc
->vc_state
=ESfunckey
;
1813 vc
->vc_ques
= (c
== '?');
1817 if (c
== ';' && vc
->vc_npar
< NPAR
- 1) {
1820 } else if (c
>='0' && c
<='9') {
1821 vc
->vc_par
[vc
->vc_npar
] *= 10;
1822 vc
->vc_par
[vc
->vc_npar
] += c
- '0';
1825 vc
->vc_state
= ESgotpars
;
1827 vc
->vc_state
= ESnormal
;
1838 vc
->vc_cursor_type
= vc
->vc_par
[0] | (vc
->vc_par
[1] << 8) | (vc
->vc_par
[2] << 16);
1840 vc
->vc_cursor_type
= CUR_DEFAULT
;
1848 vc
->vc_complement_mask
= vc
->vc_par
[0] << 8 | vc
->vc_par
[1];
1850 vc
->vc_complement_mask
= vc
->vc_s_complement_mask
;
1856 if (vc
->vc_par
[0] == 5)
1858 else if (vc
->vc_par
[0] == 6)
1859 cursor_report(vc
, tty
);
1871 gotoxy(vc
, vc
->vc_par
[0], vc
->vc_y
);
1876 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
- vc
->vc_par
[0]);
1881 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
+ vc
->vc_par
[0]);
1886 gotoxy(vc
, vc
->vc_x
+ vc
->vc_par
[0], vc
->vc_y
);
1891 gotoxy(vc
, vc
->vc_x
- vc
->vc_par
[0], vc
->vc_y
);
1896 gotoxy(vc
, 0, vc
->vc_y
+ vc
->vc_par
[0]);
1901 gotoxy(vc
, 0, vc
->vc_y
- vc
->vc_par
[0]);
1906 gotoxay(vc
, vc
->vc_x
,vc
->vc_par
[0]);
1913 gotoxay(vc
, vc
->vc_par
[1], vc
->vc_par
[0]);
1916 csi_J(vc
, vc
->vc_par
[0]);
1919 csi_K(vc
, vc
->vc_par
[0]);
1922 csi_L(vc
, vc
->vc_par
[0]);
1925 csi_M(vc
, vc
->vc_par
[0]);
1928 csi_P(vc
, vc
->vc_par
[0]);
1936 vc
->vc_tab_stop
[vc
->vc_x
>> 5] &= ~(1 << (vc
->vc_x
& 31));
1937 else if (vc
->vc_par
[0] == 3) {
1938 vc
->vc_tab_stop
[0] =
1939 vc
->vc_tab_stop
[1] =
1940 vc
->vc_tab_stop
[2] =
1941 vc
->vc_tab_stop
[3] =
1942 vc
->vc_tab_stop
[4] =
1943 vc
->vc_tab_stop
[5] =
1944 vc
->vc_tab_stop
[6] =
1945 vc
->vc_tab_stop
[7] = 0;
1951 case 'q': /* DECLL - but only 3 leds */
1952 /* map 0,1,2,3 to 0,1,2,4 */
1953 if (vc
->vc_par
[0] < 4)
1954 setledstate(kbd_table
+ vc
->vc_num
,
1955 (vc
->vc_par
[0] < 3) ? vc
->vc_par
[0] : 4);
1961 vc
->vc_par
[1] = vc
->vc_rows
;
1962 /* Minimum allowed region is 2 lines */
1963 if (vc
->vc_par
[0] < vc
->vc_par
[1] &&
1964 vc
->vc_par
[1] <= vc
->vc_rows
) {
1965 vc
->vc_top
= vc
->vc_par
[0] - 1;
1966 vc
->vc_bottom
= vc
->vc_par
[1];
1977 csi_X(vc
, vc
->vc_par
[0]);
1980 csi_at(vc
, vc
->vc_par
[0]);
1982 case ']': /* setterm functions */
1983 setterm_command(vc
);
1988 vc
->vc_state
= ESnormal
;
1990 case '@': /* defined in ISO 2022 */
1993 case 'G': /* prelim official escape code */
1994 case '8': /* retained for compatibility */
2000 vc
->vc_state
= ESnormal
;
2003 vc
->vc_state
= ESnormal
;
2005 /* DEC screen alignment test. kludge :-) */
2006 vc
->vc_video_erase_char
=
2007 (vc
->vc_video_erase_char
& 0xff00) | 'E';
2009 vc
->vc_video_erase_char
=
2010 (vc
->vc_video_erase_char
& 0xff00) | ' ';
2011 do_update_region(vc
, vc
->vc_origin
, vc
->vc_screenbuf_size
/ 2);
2016 vc
->vc_G0_charset
= GRAF_MAP
;
2018 vc
->vc_G0_charset
= LAT1_MAP
;
2020 vc
->vc_G0_charset
= IBMPC_MAP
;
2022 vc
->vc_G0_charset
= USER_MAP
;
2023 if (vc
->vc_charset
== 0)
2024 vc
->vc_translate
= set_translate(vc
->vc_G0_charset
, vc
);
2025 vc
->vc_state
= ESnormal
;
2029 vc
->vc_G1_charset
= GRAF_MAP
;
2031 vc
->vc_G1_charset
= LAT1_MAP
;
2033 vc
->vc_G1_charset
= IBMPC_MAP
;
2035 vc
->vc_G1_charset
= USER_MAP
;
2036 if (vc
->vc_charset
== 1)
2037 vc
->vc_translate
= set_translate(vc
->vc_G1_charset
, vc
);
2038 vc
->vc_state
= ESnormal
;
2041 vc
->vc_state
= ESnormal
;
2045 /* This is a temporary buffer used to prepare a tty console write
2046 * so that we can easily avoid touching user space while holding the
2047 * console spinlock. It is allocated in con_init and is shared by
2048 * this code and the vc_screen read/write tty calls.
2050 * We have to allocate this statically in the kernel data section
2051 * since console_init (and thus con_init) are called before any
2052 * kernel memory allocation is available.
2054 char con_buf
[CON_BUF_SIZE
];
2055 DEFINE_MUTEX(con_buf_mtx
);
2057 /* is_double_width() is based on the wcwidth() implementation by
2058 * Markus Kuhn -- 2007-05-26 (Unicode 5.0)
2059 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
2066 static int bisearch(uint32_t ucs
, const struct interval
*table
, int max
)
2071 if (ucs
< table
[0].first
|| ucs
> table
[max
].last
)
2073 while (max
>= min
) {
2074 mid
= (min
+ max
) / 2;
2075 if (ucs
> table
[mid
].last
)
2077 else if (ucs
< table
[mid
].first
)
2085 static int is_double_width(uint32_t ucs
)
2087 static const struct interval double_width
[] = {
2088 { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E },
2089 { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF },
2090 { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 },
2091 { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD }
2093 return bisearch(ucs
, double_width
, ARRAY_SIZE(double_width
) - 1);
2096 /* acquires console_sem */
2097 static int do_con_write(struct tty_struct
*tty
, const unsigned char *buf
, int count
)
2099 #ifdef VT_BUF_VRAM_ONLY
2100 #define FLUSH do { } while(0);
2102 #define FLUSH if (draw_x >= 0) { \
2103 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
2108 int c
, tc
, ok
, n
= 0, draw_x
= -1;
2109 unsigned int currcons
;
2110 unsigned long draw_from
= 0, draw_to
= 0;
2112 unsigned char vc_attr
;
2113 struct vt_notifier_param param
;
2117 u16 himask
, charmask
;
2118 const unsigned char *orig_buf
= NULL
;
2126 acquire_console_sem();
2127 vc
= tty
->driver_data
;
2129 printk(KERN_ERR
"vt: argh, driver_data is NULL !\n");
2130 release_console_sem();
2134 currcons
= vc
->vc_num
;
2135 if (!vc_cons_allocated(currcons
)) {
2136 /* could this happen? */
2137 static int error
= 0;
2140 printk("con_write: tty %d not allocated\n", currcons
+1);
2142 release_console_sem();
2148 himask
= vc
->vc_hi_font_mask
;
2149 charmask
= himask
? 0x1ff : 0xff;
2151 /* undraw cursor first */
2157 while (!tty
->stopped
&& count
) {
2167 /* Do no translation at all in control states */
2168 if (vc
->vc_state
!= ESnormal
) {
2170 } else if (vc
->vc_utf
&& !vc
->vc_disp_ctrl
) {
2171 /* Combine UTF-8 into Unicode in vc_utf_char.
2172 * vc_utf_count is the number of continuation bytes still
2173 * expected to arrive.
2174 * vc_npar is the number of continuation bytes arrived so
2178 if ((c
& 0xc0) == 0x80) {
2179 /* Continuation byte received */
2180 static const uint32_t utf8_length_changes
[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff };
2181 if (vc
->vc_utf_count
) {
2182 vc
->vc_utf_char
= (vc
->vc_utf_char
<< 6) | (c
& 0x3f);
2184 if (--vc
->vc_utf_count
) {
2185 /* Still need some bytes */
2188 /* Got a whole character */
2189 c
= vc
->vc_utf_char
;
2190 /* Reject overlong sequences */
2191 if (c
<= utf8_length_changes
[vc
->vc_npar
- 1] ||
2192 c
> utf8_length_changes
[vc
->vc_npar
])
2195 /* Unexpected continuation byte */
2196 vc
->vc_utf_count
= 0;
2200 /* Single ASCII byte or first byte of a sequence received */
2201 if (vc
->vc_utf_count
) {
2202 /* Continuation byte expected */
2204 vc
->vc_utf_count
= 0;
2206 } else if (c
> 0x7f) {
2207 /* First byte of a multibyte sequence received */
2209 if ((c
& 0xe0) == 0xc0) {
2210 vc
->vc_utf_count
= 1;
2211 vc
->vc_utf_char
= (c
& 0x1f);
2212 } else if ((c
& 0xf0) == 0xe0) {
2213 vc
->vc_utf_count
= 2;
2214 vc
->vc_utf_char
= (c
& 0x0f);
2215 } else if ((c
& 0xf8) == 0xf0) {
2216 vc
->vc_utf_count
= 3;
2217 vc
->vc_utf_char
= (c
& 0x07);
2218 } else if ((c
& 0xfc) == 0xf8) {
2219 vc
->vc_utf_count
= 4;
2220 vc
->vc_utf_char
= (c
& 0x03);
2221 } else if ((c
& 0xfe) == 0xfc) {
2222 vc
->vc_utf_count
= 5;
2223 vc
->vc_utf_char
= (c
& 0x01);
2225 /* 254 and 255 are invalid */
2228 if (vc
->vc_utf_count
) {
2229 /* Still need some bytes */
2233 /* Nothing to do if an ASCII byte was received */
2235 /* End of UTF-8 decoding. */
2236 /* c is the received character, or U+FFFD for invalid sequences. */
2237 /* Replace invalid Unicode code points with U+FFFD too */
2238 if ((c
>= 0xd800 && c
<= 0xdfff) || c
== 0xfffe || c
== 0xffff)
2241 } else { /* no utf or alternate charset mode */
2242 tc
= vc_translate(vc
, c
);
2246 if (atomic_notifier_call_chain(&vt_notifier_list
, VT_PREWRITE
,
2247 ¶m
) == NOTIFY_STOP
)
2250 /* If the original code was a control character we
2251 * only allow a glyph to be displayed if the code is
2252 * not normally used (such as for cursor movement) or
2253 * if the disp_ctrl mode has been explicitly enabled.
2254 * Certain characters (as given by the CTRL_ALWAYS
2255 * bitmap) are always displayed as control characters,
2256 * as the console would be pretty useless without
2257 * them; to display an arbitrary font position use the
2258 * direct-to-font zone in UTF-8 mode.
2260 ok
= tc
&& (c
>= 32 ||
2261 !(vc
->vc_disp_ctrl
? (CTRL_ALWAYS
>> c
) & 1 :
2262 vc
->vc_utf
|| ((CTRL_ACTION
>> c
) & 1)))
2263 && (c
!= 127 || vc
->vc_disp_ctrl
)
2266 if (vc
->vc_state
== ESnormal
&& ok
) {
2267 if (vc
->vc_utf
&& !vc
->vc_disp_ctrl
) {
2268 if (is_double_width(c
))
2271 /* Now try to find out how to display it */
2272 tc
= conv_uni_to_pc(vc
, tc
);
2273 if (tc
& ~charmask
) {
2274 if (tc
== -1 || tc
== -2) {
2275 continue; /* nothing to display */
2277 /* Glyph not found */
2278 if ((!(vc
->vc_utf
&& !vc
->vc_disp_ctrl
) || c
< 128) && !(c
& ~charmask
)) {
2279 /* In legacy mode use the glyph we get by a 1:1 mapping.
2280 This would make absolutely no sense with Unicode in mind,
2281 but do this for ASCII characters since a font may lack
2282 Unicode mapping info and we don't want to end up with
2283 having question marks only. */
2286 /* Display U+FFFD. If it's not found, display an inverse question mark. */
2287 tc
= conv_uni_to_pc(vc
, 0xfffd);
2290 tc
= conv_uni_to_pc(vc
, '?');
2291 if (tc
< 0) tc
= '?';
2297 vc_attr
= vc
->vc_attr
;
2299 /* invert vc_attr */
2300 if (!vc
->vc_can_do_color
) {
2301 vc_attr
= (vc
->vc_attr
) ^ 0x08;
2302 } else if (vc
->vc_hi_font_mask
== 0x100) {
2303 vc_attr
= ((vc
->vc_attr
) & 0x11) | (((vc
->vc_attr
) & 0xe0) >> 4) | (((vc
->vc_attr
) & 0x0e) << 4);
2305 vc_attr
= ((vc
->vc_attr
) & 0x88) | (((vc
->vc_attr
) & 0x70) >> 4) | (((vc
->vc_attr
) & 0x07) << 4);
2311 if (vc
->vc_need_wrap
|| vc
->vc_decim
)
2313 if (vc
->vc_need_wrap
) {
2320 ((vc_attr
<< 8) & ~himask
) + ((tc
& 0x100) ? himask
: 0) + (tc
& 0xff) :
2321 (vc_attr
<< 8) + tc
,
2322 (u16
*) vc
->vc_pos
);
2323 if (DO_UPDATE(vc
) && draw_x
< 0) {
2325 draw_from
= vc
->vc_pos
;
2327 if (vc
->vc_x
== vc
->vc_cols
- 1) {
2328 vc
->vc_need_wrap
= vc
->vc_decawm
;
2329 draw_to
= vc
->vc_pos
+ 2;
2332 draw_to
= (vc
->vc_pos
+= 2);
2335 if (!--width
) break;
2337 tc
= conv_uni_to_pc(vc
, ' '); /* A space is printed in the second column */
2338 if (tc
< 0) tc
= ' ';
2340 notify_write(vc
, c
);
2351 goto rescan_last_byte
;
2356 do_con_trol(tty
, vc
, orig
);
2359 console_conditional_schedule();
2360 release_console_sem();
2367 * This is the console switching callback.
2369 * Doing console switching in a process context allows
2370 * us to do the switches asynchronously (needed when we want
2371 * to switch due to a keyboard interrupt). Synchronization
2372 * with other console code and prevention of re-entrancy is
2373 * ensured with console_sem.
2375 static void console_callback(struct work_struct
*ignored
)
2377 acquire_console_sem();
2379 if (want_console
>= 0) {
2380 if (want_console
!= fg_console
&&
2381 vc_cons_allocated(want_console
)) {
2382 hide_cursor(vc_cons
[fg_console
].d
);
2383 change_console(vc_cons
[want_console
].d
);
2384 /* we only changed when the console had already
2385 been allocated - a new console is not created
2386 in an interrupt routine */
2390 if (do_poke_blanked_console
) { /* do not unblank for a LED change */
2391 do_poke_blanked_console
= 0;
2392 poke_blanked_console();
2394 if (scrollback_delta
) {
2395 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
2397 if (vc
->vc_mode
== KD_TEXT
)
2398 vc
->vc_sw
->con_scrolldelta(vc
, scrollback_delta
);
2399 scrollback_delta
= 0;
2401 if (blank_timer_expired
) {
2403 blank_timer_expired
= 0;
2405 notify_update(vc_cons
[fg_console
].d
);
2407 release_console_sem();
2410 int set_console(int nr
)
2412 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
2414 if (!vc_cons_allocated(nr
) || vt_dont_switch
||
2415 (vc
->vt_mode
.mode
== VT_AUTO
&& vc
->vc_mode
== KD_GRAPHICS
)) {
2418 * Console switch will fail in console_callback() or
2419 * change_console() so there is no point scheduling
2422 * Existing set_console() users don't check the return
2423 * value so this shouldn't break anything
2429 schedule_console_callback();
2434 struct tty_driver
*console_driver
;
2436 #ifdef CONFIG_VT_CONSOLE
2439 * Console on virtual terminal
2441 * The console must be locked when we get here.
2444 static void vt_console_print(struct console
*co
, const char *b
, unsigned count
)
2446 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
2448 static DEFINE_SPINLOCK(printing_lock
);
2449 const ushort
*start
;
2453 /* console busy or not yet initialized */
2456 if (!spin_trylock(&printing_lock
))
2459 if (kmsg_redirect
&& vc_cons_allocated(kmsg_redirect
- 1))
2460 vc
= vc_cons
[kmsg_redirect
- 1].d
;
2462 /* read `x' only after setting currcons properly (otherwise
2463 the `x' macro will read the x of the foreground console). */
2466 if (!vc_cons_allocated(fg_console
)) {
2468 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2472 if (vc
->vc_mode
!= KD_TEXT
)
2475 /* undraw cursor first */
2479 start
= (ushort
*)vc
->vc_pos
;
2481 /* Contrived structure to try to emulate original need_wrap behaviour
2482 * Problems caused when we have need_wrap set on '\n' character */
2485 if (c
== 10 || c
== 13 || c
== 8 || vc
->vc_need_wrap
) {
2487 if (CON_IS_VISIBLE(vc
))
2488 vc
->vc_sw
->con_putcs(vc
, start
, cnt
, vc
->vc_y
, vc
->vc_x
);
2490 if (vc
->vc_need_wrap
)
2494 if (c
== 8) { /* backspace */
2496 start
= (ushort
*)vc
->vc_pos
;
2503 start
= (ushort
*)vc
->vc_pos
;
2505 if (c
== 10 || c
== 13)
2508 scr_writew((vc
->vc_attr
<< 8) + c
, (unsigned short *)vc
->vc_pos
);
2509 notify_write(vc
, c
);
2511 if (myx
== vc
->vc_cols
- 1) {
2512 vc
->vc_need_wrap
= 1;
2519 if (CON_IS_VISIBLE(vc
))
2520 vc
->vc_sw
->con_putcs(vc
, start
, cnt
, vc
->vc_y
, vc
->vc_x
);
2522 if (vc
->vc_x
== vc
->vc_cols
) {
2524 vc
->vc_need_wrap
= 1;
2531 spin_unlock(&printing_lock
);
2534 static struct tty_driver
*vt_console_device(struct console
*c
, int *index
)
2536 *index
= c
->index
? c
->index
-1 : fg_console
;
2537 return console_driver
;
2540 static struct console vt_console_driver
= {
2542 .write
= vt_console_print
,
2543 .device
= vt_console_device
,
2544 .unblank
= unblank_screen
,
2545 .flags
= CON_PRINTBUFFER
,
2551 * Handling of Linux-specific VC ioctls
2555 * Generally a bit racy with respect to console_sem().
2557 * There are some functions which don't need it.
2559 * There are some functions which can sleep for arbitrary periods
2560 * (paste_selection) but we don't need the lock there anyway.
2562 * set_selection has locking, and definitely needs it
2565 int tioclinux(struct tty_struct
*tty
, unsigned long arg
)
2568 char __user
*p
= (char __user
*)arg
;
2572 if (current
->signal
->tty
!= tty
&& !capable(CAP_SYS_ADMIN
))
2574 if (get_user(type
, p
))
2583 acquire_console_sem();
2584 ret
= set_selection((struct tiocl_selection __user
*)(p
+1), tty
);
2585 release_console_sem();
2587 case TIOCL_PASTESEL
:
2588 ret
= paste_selection(tty
);
2590 case TIOCL_UNBLANKSCREEN
:
2591 acquire_console_sem();
2593 release_console_sem();
2595 case TIOCL_SELLOADLUT
:
2596 ret
= sel_loadlut(p
);
2598 case TIOCL_GETSHIFTSTATE
:
2601 * Make it possible to react to Shift+Mousebutton.
2602 * Note that 'shift_state' is an undocumented
2603 * kernel-internal variable; programs not closely
2604 * related to the kernel should not use this.
2607 ret
= __put_user(data
, p
);
2609 case TIOCL_GETMOUSEREPORTING
:
2610 data
= mouse_reporting();
2611 ret
= __put_user(data
, p
);
2613 case TIOCL_SETVESABLANK
:
2614 ret
= set_vesa_blanking(p
);
2616 case TIOCL_GETKMSGREDIRECT
:
2617 data
= kmsg_redirect
;
2618 ret
= __put_user(data
, p
);
2620 case TIOCL_SETKMSGREDIRECT
:
2621 if (!capable(CAP_SYS_ADMIN
)) {
2624 if (get_user(data
, p
+1))
2627 kmsg_redirect
= data
;
2630 case TIOCL_GETFGCONSOLE
:
2633 case TIOCL_SCROLLCONSOLE
:
2634 if (get_user(lines
, (s32 __user
*)(p
+4))) {
2637 scrollfront(vc_cons
[fg_console
].d
, lines
);
2641 case TIOCL_BLANKSCREEN
: /* until explicitly unblanked, not only poked */
2642 acquire_console_sem();
2645 release_console_sem();
2647 case TIOCL_BLANKEDSCREEN
:
2648 ret
= console_blanked
;
2659 * /dev/ttyN handling
2662 static int con_write(struct tty_struct
*tty
, const unsigned char *buf
, int count
)
2666 retval
= do_con_write(tty
, buf
, count
);
2667 con_flush_chars(tty
);
2672 static int con_put_char(struct tty_struct
*tty
, unsigned char ch
)
2675 return 0; /* n_r3964 calls put_char() from interrupt context */
2676 return do_con_write(tty
, &ch
, 1);
2679 static int con_write_room(struct tty_struct
*tty
)
2683 return 32768; /* No limit, really; we're not buffering */
2686 static int con_chars_in_buffer(struct tty_struct
*tty
)
2688 return 0; /* we're not buffering */
2692 * con_throttle and con_unthrottle are only used for
2693 * paste_selection(), which has to stuff in a large number of
2696 static void con_throttle(struct tty_struct
*tty
)
2700 static void con_unthrottle(struct tty_struct
*tty
)
2702 struct vc_data
*vc
= tty
->driver_data
;
2704 wake_up_interruptible(&vc
->paste_wait
);
2708 * Turn the Scroll-Lock LED on when the tty is stopped
2710 static void con_stop(struct tty_struct
*tty
)
2715 console_num
= tty
->index
;
2716 if (!vc_cons_allocated(console_num
))
2718 set_vc_kbd_led(kbd_table
+ console_num
, VC_SCROLLOCK
);
2723 * Turn the Scroll-Lock LED off when the console is started
2725 static void con_start(struct tty_struct
*tty
)
2730 console_num
= tty
->index
;
2731 if (!vc_cons_allocated(console_num
))
2733 clr_vc_kbd_led(kbd_table
+ console_num
, VC_SCROLLOCK
);
2737 static void con_flush_chars(struct tty_struct
*tty
)
2741 if (in_interrupt()) /* from flush_to_ldisc */
2744 /* if we race with con_close(), vt may be null */
2745 acquire_console_sem();
2746 vc
= tty
->driver_data
;
2749 release_console_sem();
2753 * Allocate the console screen memory.
2755 static int con_open(struct tty_struct
*tty
, struct file
*filp
)
2757 unsigned int currcons
= tty
->index
;
2760 acquire_console_sem();
2761 if (tty
->driver_data
== NULL
) {
2762 ret
= vc_allocate(currcons
);
2764 struct vc_data
*vc
= vc_cons
[currcons
].d
;
2766 /* Still being freed */
2768 release_console_sem();
2769 return -ERESTARTSYS
;
2771 tty
->driver_data
= vc
;
2774 if (!tty
->winsize
.ws_row
&& !tty
->winsize
.ws_col
) {
2775 tty
->winsize
.ws_row
= vc_cons
[currcons
].d
->vc_rows
;
2776 tty
->winsize
.ws_col
= vc_cons
[currcons
].d
->vc_cols
;
2779 tty
->termios
->c_iflag
|= IUTF8
;
2781 tty
->termios
->c_iflag
&= ~IUTF8
;
2782 release_console_sem();
2786 release_console_sem();
2790 static void con_close(struct tty_struct
*tty
, struct file
*filp
)
2792 /* Nothing to do - we defer to shutdown */
2795 static void con_shutdown(struct tty_struct
*tty
)
2797 struct vc_data
*vc
= tty
->driver_data
;
2799 acquire_console_sem();
2801 release_console_sem();
2805 static int default_italic_color
= 2; // green (ASCII)
2806 static int default_underline_color
= 3; // cyan (ASCII)
2807 module_param_named(italic
, default_italic_color
, int, S_IRUGO
| S_IWUSR
);
2808 module_param_named(underline
, default_underline_color
, int, S_IRUGO
| S_IWUSR
);
2810 static void vc_init(struct vc_data
*vc
, unsigned int rows
,
2811 unsigned int cols
, int do_clear
)
2817 vc
->vc_size_row
= cols
<< 1;
2818 vc
->vc_screenbuf_size
= vc
->vc_rows
* vc
->vc_size_row
;
2821 vc
->vc_pos
= vc
->vc_origin
;
2823 for (j
=k
=0; j
<16; j
++) {
2824 vc
->vc_palette
[k
++] = default_red
[j
] ;
2825 vc
->vc_palette
[k
++] = default_grn
[j
] ;
2826 vc
->vc_palette
[k
++] = default_blu
[j
] ;
2828 vc
->vc_def_color
= 0x07; /* white */
2829 vc
->vc_ulcolor
= default_underline_color
;
2830 vc
->vc_itcolor
= default_italic_color
;
2831 vc
->vc_halfcolor
= 0x08; /* grey */
2832 init_waitqueue_head(&vc
->paste_wait
);
2833 reset_terminal(vc
, do_clear
);
2837 * This routine initializes console interrupts, and does nothing
2838 * else. If you want the screen to clear, call tty_write with
2839 * the appropriate escape-sequence.
2842 static int __init
con_init(void)
2844 const char *display_desc
= NULL
;
2846 unsigned int currcons
= 0, i
;
2848 acquire_console_sem();
2851 display_desc
= conswitchp
->con_startup();
2852 if (!display_desc
) {
2854 release_console_sem();
2858 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
2859 struct con_driver
*con_driver
= ®istered_con_driver
[i
];
2861 if (con_driver
->con
== NULL
) {
2862 con_driver
->con
= conswitchp
;
2863 con_driver
->desc
= display_desc
;
2864 con_driver
->flag
= CON_DRIVER_FLAG_INIT
;
2865 con_driver
->first
= 0;
2866 con_driver
->last
= MAX_NR_CONSOLES
- 1;
2871 for (i
= 0; i
< MAX_NR_CONSOLES
; i
++)
2872 con_driver_map
[i
] = conswitchp
;
2874 if (blankinterval
) {
2875 blank_state
= blank_normal_wait
;
2876 mod_timer(&console_timer
, jiffies
+ (blankinterval
* HZ
));
2879 for (currcons
= 0; currcons
< MIN_NR_CONSOLES
; currcons
++) {
2880 vc_cons
[currcons
].d
= vc
= kzalloc(sizeof(struct vc_data
), GFP_NOWAIT
);
2881 INIT_WORK(&vc_cons
[currcons
].SAK_work
, vc_SAK
);
2882 visual_init(vc
, currcons
, 1);
2883 vc
->vc_screenbuf
= kzalloc(vc
->vc_screenbuf_size
, GFP_NOWAIT
);
2884 vc
->vc_kmalloced
= 0;
2885 vc_init(vc
, vc
->vc_rows
, vc
->vc_cols
,
2886 currcons
|| !vc
->vc_sw
->con_save_screen
);
2888 currcons
= fg_console
= 0;
2889 master_display_fg
= vc
= vc_cons
[currcons
].d
;
2892 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
);
2895 printk("Console: %s %s %dx%d",
2896 vc
->vc_can_do_color
? "colour" : "mono",
2897 display_desc
, vc
->vc_cols
, vc
->vc_rows
);
2901 release_console_sem();
2903 #ifdef CONFIG_VT_CONSOLE
2904 register_console(&vt_console_driver
);
2908 console_initcall(con_init
);
2910 static const struct tty_operations con_ops
= {
2914 .write_room
= con_write_room
,
2915 .put_char
= con_put_char
,
2916 .flush_chars
= con_flush_chars
,
2917 .chars_in_buffer
= con_chars_in_buffer
,
2921 .throttle
= con_throttle
,
2922 .unthrottle
= con_unthrottle
,
2923 .resize
= vt_resize
,
2924 .shutdown
= con_shutdown
2927 static struct cdev vc0_cdev
;
2929 int __init
vty_init(const struct file_operations
*console_fops
)
2931 cdev_init(&vc0_cdev
, console_fops
);
2932 if (cdev_add(&vc0_cdev
, MKDEV(TTY_MAJOR
, 0), 1) ||
2933 register_chrdev_region(MKDEV(TTY_MAJOR
, 0), 1, "/dev/vc/0") < 0)
2934 panic("Couldn't register /dev/tty0 driver\n");
2935 device_create(tty_class
, NULL
, MKDEV(TTY_MAJOR
, 0), NULL
, "tty0");
2939 console_driver
= alloc_tty_driver(MAX_NR_CONSOLES
);
2940 if (!console_driver
)
2941 panic("Couldn't allocate console driver\n");
2942 console_driver
->owner
= THIS_MODULE
;
2943 console_driver
->name
= "tty";
2944 console_driver
->name_base
= 1;
2945 console_driver
->major
= TTY_MAJOR
;
2946 console_driver
->minor_start
= 1;
2947 console_driver
->type
= TTY_DRIVER_TYPE_CONSOLE
;
2948 console_driver
->init_termios
= tty_std_termios
;
2950 console_driver
->init_termios
.c_iflag
|= IUTF8
;
2951 console_driver
->flags
= TTY_DRIVER_REAL_RAW
| TTY_DRIVER_RESET_TERMIOS
;
2952 tty_set_operations(console_driver
, &con_ops
);
2953 if (tty_register_driver(console_driver
))
2954 panic("Couldn't register console driver\n");
2957 #ifdef CONFIG_PROM_CONSOLE
2960 #ifdef CONFIG_MDA_CONSOLE
2966 #ifndef VT_SINGLE_DRIVER
2967 #include <linux/device.h>
2969 static struct class *vtconsole_class
;
2971 static int bind_con_driver(const struct consw
*csw
, int first
, int last
,
2974 struct module
*owner
= csw
->owner
;
2975 const char *desc
= NULL
;
2976 struct con_driver
*con_driver
;
2977 int i
, j
= -1, k
= -1, retval
= -ENODEV
;
2979 if (!try_module_get(owner
))
2982 acquire_console_sem();
2984 /* check if driver is registered */
2985 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
2986 con_driver
= ®istered_con_driver
[i
];
2988 if (con_driver
->con
== csw
) {
2989 desc
= con_driver
->desc
;
2998 if (!(con_driver
->flag
& CON_DRIVER_FLAG_INIT
)) {
3000 con_driver
->flag
|= CON_DRIVER_FLAG_INIT
;
3005 module_put(conswitchp
->owner
);
3007 __module_get(owner
);
3011 first
= max(first
, con_driver
->first
);
3012 last
= min(last
, con_driver
->last
);
3014 for (i
= first
; i
<= last
; i
++) {
3016 struct vc_data
*vc
= vc_cons
[i
].d
;
3018 if (con_driver_map
[i
])
3019 module_put(con_driver_map
[i
]->owner
);
3020 __module_get(owner
);
3021 con_driver_map
[i
] = csw
;
3023 if (!vc
|| !vc
->vc_sw
)
3028 if (CON_IS_VISIBLE(vc
)) {
3033 old_was_color
= vc
->vc_can_do_color
;
3034 vc
->vc_sw
->con_deinit(vc
);
3035 vc
->vc_origin
= (unsigned long)vc
->vc_screenbuf
;
3036 visual_init(vc
, i
, 0);
3040 /* If the console changed between mono <-> color, then
3041 * the attributes in the screenbuf will be wrong. The
3042 * following resets all attributes to something sane.
3044 if (old_was_color
!= vc
->vc_can_do_color
)
3045 clear_buffer_attributes(vc
);
3048 printk("Console: switching ");
3050 printk("consoles %d-%d ", first
+1, last
+1);
3052 struct vc_data
*vc
= vc_cons
[j
].d
;
3054 printk("to %s %s %dx%d\n",
3055 vc
->vc_can_do_color
? "colour" : "mono",
3056 desc
, vc
->vc_cols
, vc
->vc_rows
);
3063 printk("to %s\n", desc
);
3067 release_console_sem();
3072 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
3073 static int con_is_graphics(const struct consw
*csw
, int first
, int last
)
3077 for (i
= first
; i
<= last
; i
++) {
3078 struct vc_data
*vc
= vc_cons
[i
].d
;
3080 if (vc
&& vc
->vc_mode
== KD_GRAPHICS
) {
3090 * unbind_con_driver - unbind a console driver
3091 * @csw: pointer to console driver to unregister
3092 * @first: first in range of consoles that @csw should be unbound from
3093 * @last: last in range of consoles that @csw should be unbound from
3094 * @deflt: should next bound console driver be default after @csw is unbound?
3096 * To unbind a driver from all possible consoles, pass 0 as @first and
3097 * %MAX_NR_CONSOLES as @last.
3099 * @deflt controls whether the console that ends up replacing @csw should be
3100 * the default console.
3103 * -ENODEV if @csw isn't a registered console driver or can't be unregistered
3106 int unbind_con_driver(const struct consw
*csw
, int first
, int last
, int deflt
)
3108 struct module
*owner
= csw
->owner
;
3109 const struct consw
*defcsw
= NULL
;
3110 struct con_driver
*con_driver
= NULL
, *con_back
= NULL
;
3111 int i
, retval
= -ENODEV
;
3113 if (!try_module_get(owner
))
3116 acquire_console_sem();
3118 /* check if driver is registered and if it is unbindable */
3119 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3120 con_driver
= ®istered_con_driver
[i
];
3122 if (con_driver
->con
== csw
&&
3123 con_driver
->flag
& CON_DRIVER_FLAG_MODULE
) {
3130 release_console_sem();
3136 /* check if backup driver exists */
3137 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3138 con_back
= ®istered_con_driver
[i
];
3140 if (con_back
->con
&&
3141 !(con_back
->flag
& CON_DRIVER_FLAG_MODULE
)) {
3142 defcsw
= con_back
->con
;
3149 release_console_sem();
3153 if (!con_is_bound(csw
)) {
3154 release_console_sem();
3158 first
= max(first
, con_driver
->first
);
3159 last
= min(last
, con_driver
->last
);
3161 for (i
= first
; i
<= last
; i
++) {
3162 if (con_driver_map
[i
] == csw
) {
3163 module_put(csw
->owner
);
3164 con_driver_map
[i
] = NULL
;
3168 if (!con_is_bound(defcsw
)) {
3169 const struct consw
*defconsw
= conswitchp
;
3171 defcsw
->con_startup();
3172 con_back
->flag
|= CON_DRIVER_FLAG_INIT
;
3174 * vgacon may change the default driver to point
3175 * to dummycon, we restore it here...
3177 conswitchp
= defconsw
;
3180 if (!con_is_bound(csw
))
3181 con_driver
->flag
&= ~CON_DRIVER_FLAG_INIT
;
3183 release_console_sem();
3184 /* ignore return value, binding should not fail */
3185 bind_con_driver(defcsw
, first
, last
, deflt
);
3191 EXPORT_SYMBOL(unbind_con_driver
);
3193 static int vt_bind(struct con_driver
*con
)
3195 const struct consw
*defcsw
= NULL
, *csw
= NULL
;
3196 int i
, more
= 1, first
= -1, last
= -1, deflt
= 0;
3198 if (!con
->con
|| !(con
->flag
& CON_DRIVER_FLAG_MODULE
) ||
3199 con_is_graphics(con
->con
, con
->first
, con
->last
))
3204 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3205 struct con_driver
*con
= ®istered_con_driver
[i
];
3207 if (con
->con
&& !(con
->flag
& CON_DRIVER_FLAG_MODULE
)) {
3219 for (i
= con
->first
; i
<= con
->last
; i
++) {
3220 if (con_driver_map
[i
] == defcsw
) {
3225 } else if (first
!= -1)
3229 if (first
== 0 && last
== MAX_NR_CONSOLES
-1)
3233 bind_con_driver(csw
, first
, last
, deflt
);
3244 static int vt_unbind(struct con_driver
*con
)
3246 const struct consw
*csw
= NULL
;
3247 int i
, more
= 1, first
= -1, last
= -1, deflt
= 0;
3249 if (!con
->con
|| !(con
->flag
& CON_DRIVER_FLAG_MODULE
) ||
3250 con_is_graphics(con
->con
, con
->first
, con
->last
))
3258 for (i
= con
->first
; i
<= con
->last
; i
++) {
3259 if (con_driver_map
[i
] == csw
) {
3264 } else if (first
!= -1)
3268 if (first
== 0 && last
== MAX_NR_CONSOLES
-1)
3272 unbind_con_driver(csw
, first
, last
, deflt
);
3283 static inline int vt_bind(struct con_driver
*con
)
3287 static inline int vt_unbind(struct con_driver
*con
)
3291 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3293 static ssize_t
store_bind(struct device
*dev
, struct device_attribute
*attr
,
3294 const char *buf
, size_t count
)
3296 struct con_driver
*con
= dev_get_drvdata(dev
);
3297 int bind
= simple_strtoul(buf
, NULL
, 0);
3307 static ssize_t
show_bind(struct device
*dev
, struct device_attribute
*attr
,
3310 struct con_driver
*con
= dev_get_drvdata(dev
);
3311 int bind
= con_is_bound(con
->con
);
3313 return snprintf(buf
, PAGE_SIZE
, "%i\n", bind
);
3316 static ssize_t
show_name(struct device
*dev
, struct device_attribute
*attr
,
3319 struct con_driver
*con
= dev_get_drvdata(dev
);
3321 return snprintf(buf
, PAGE_SIZE
, "%s %s\n",
3322 (con
->flag
& CON_DRIVER_FLAG_MODULE
) ? "(M)" : "(S)",
3327 static struct device_attribute device_attrs
[] = {
3328 __ATTR(bind
, S_IRUGO
|S_IWUSR
, show_bind
, store_bind
),
3329 __ATTR(name
, S_IRUGO
, show_name
, NULL
),
3332 static int vtconsole_init_device(struct con_driver
*con
)
3337 con
->flag
|= CON_DRIVER_FLAG_ATTR
;
3338 dev_set_drvdata(con
->dev
, con
);
3339 for (i
= 0; i
< ARRAY_SIZE(device_attrs
); i
++) {
3340 error
= device_create_file(con
->dev
, &device_attrs
[i
]);
3347 device_remove_file(con
->dev
, &device_attrs
[i
]);
3348 con
->flag
&= ~CON_DRIVER_FLAG_ATTR
;
3354 static void vtconsole_deinit_device(struct con_driver
*con
)
3358 if (con
->flag
& CON_DRIVER_FLAG_ATTR
) {
3359 for (i
= 0; i
< ARRAY_SIZE(device_attrs
); i
++)
3360 device_remove_file(con
->dev
, &device_attrs
[i
]);
3361 con
->flag
&= ~CON_DRIVER_FLAG_ATTR
;
3366 * con_is_bound - checks if driver is bound to the console
3367 * @csw: console driver
3369 * RETURNS: zero if unbound, nonzero if bound
3371 * Drivers can call this and if zero, they should release
3372 * all resources allocated on con_startup()
3374 int con_is_bound(const struct consw
*csw
)
3378 for (i
= 0; i
< MAX_NR_CONSOLES
; i
++) {
3379 if (con_driver_map
[i
] == csw
) {
3387 EXPORT_SYMBOL(con_is_bound
);
3390 * register_con_driver - register console driver to console layer
3391 * @csw: console driver
3392 * @first: the first console to take over, minimum value is 0
3393 * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1
3395 * DESCRIPTION: This function registers a console driver which can later
3396 * bind to a range of consoles specified by @first and @last. It will
3397 * also initialize the console driver by calling con_startup().
3399 int register_con_driver(const struct consw
*csw
, int first
, int last
)
3401 struct module
*owner
= csw
->owner
;
3402 struct con_driver
*con_driver
;
3406 if (!try_module_get(owner
))
3409 acquire_console_sem();
3411 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3412 con_driver
= ®istered_con_driver
[i
];
3414 /* already registered */
3415 if (con_driver
->con
== csw
)
3422 desc
= csw
->con_startup();
3429 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3430 con_driver
= ®istered_con_driver
[i
];
3432 if (con_driver
->con
== NULL
) {
3433 con_driver
->con
= csw
;
3434 con_driver
->desc
= desc
;
3435 con_driver
->node
= i
;
3436 con_driver
->flag
= CON_DRIVER_FLAG_MODULE
|
3437 CON_DRIVER_FLAG_INIT
;
3438 con_driver
->first
= first
;
3439 con_driver
->last
= last
;
3448 con_driver
->dev
= device_create(vtconsole_class
, NULL
,
3449 MKDEV(0, con_driver
->node
),
3453 if (IS_ERR(con_driver
->dev
)) {
3454 printk(KERN_WARNING
"Unable to create device for %s; "
3455 "errno = %ld\n", con_driver
->desc
,
3456 PTR_ERR(con_driver
->dev
));
3457 con_driver
->dev
= NULL
;
3459 vtconsole_init_device(con_driver
);
3463 release_console_sem();
3467 EXPORT_SYMBOL(register_con_driver
);
3470 * unregister_con_driver - unregister console driver from console layer
3471 * @csw: console driver
3473 * DESCRIPTION: All drivers that registers to the console layer must
3474 * call this function upon exit, or if the console driver is in a state
3475 * where it won't be able to handle console services, such as the
3476 * framebuffer console without loaded framebuffer drivers.
3478 * The driver must unbind first prior to unregistration.
3480 int unregister_con_driver(const struct consw
*csw
)
3482 int i
, retval
= -ENODEV
;
3484 acquire_console_sem();
3486 /* cannot unregister a bound driver */
3487 if (con_is_bound(csw
))
3490 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3491 struct con_driver
*con_driver
= ®istered_con_driver
[i
];
3493 if (con_driver
->con
== csw
&&
3494 con_driver
->flag
& CON_DRIVER_FLAG_MODULE
) {
3495 vtconsole_deinit_device(con_driver
);
3496 device_destroy(vtconsole_class
,
3497 MKDEV(0, con_driver
->node
));
3498 con_driver
->con
= NULL
;
3499 con_driver
->desc
= NULL
;
3500 con_driver
->dev
= NULL
;
3501 con_driver
->node
= 0;
3502 con_driver
->flag
= 0;
3503 con_driver
->first
= 0;
3504 con_driver
->last
= 0;
3510 release_console_sem();
3513 EXPORT_SYMBOL(unregister_con_driver
);
3516 * If we support more console drivers, this function is used
3517 * when a driver wants to take over some existing consoles
3518 * and become default driver for newly opened ones.
3520 * take_over_console is basically a register followed by unbind
3522 int take_over_console(const struct consw
*csw
, int first
, int last
, int deflt
)
3526 err
= register_con_driver(csw
, first
, last
);
3529 bind_con_driver(csw
, first
, last
, deflt
);
3535 * give_up_console is a wrapper to unregister_con_driver. It will only
3536 * work if driver is fully unbound.
3538 void give_up_console(const struct consw
*csw
)
3540 unregister_con_driver(csw
);
3543 static int __init
vtconsole_class_init(void)
3547 vtconsole_class
= class_create(THIS_MODULE
, "vtconsole");
3548 if (IS_ERR(vtconsole_class
)) {
3549 printk(KERN_WARNING
"Unable to create vt console class; "
3550 "errno = %ld\n", PTR_ERR(vtconsole_class
));
3551 vtconsole_class
= NULL
;
3554 /* Add system drivers to sysfs */
3555 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3556 struct con_driver
*con
= ®istered_con_driver
[i
];
3558 if (con
->con
&& !con
->dev
) {
3559 con
->dev
= device_create(vtconsole_class
, NULL
,
3560 MKDEV(0, con
->node
),
3564 if (IS_ERR(con
->dev
)) {
3565 printk(KERN_WARNING
"Unable to create "
3566 "device for %s; errno = %ld\n",
3567 con
->desc
, PTR_ERR(con
->dev
));
3570 vtconsole_init_device(con
);
3577 postcore_initcall(vtconsole_class_init
);
3585 static int set_vesa_blanking(char __user
*p
)
3589 if (get_user(mode
, p
+ 1))
3592 vesa_blank_mode
= (mode
< 4) ? mode
: 0;
3596 void do_blank_screen(int entering_gfx
)
3598 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
3601 WARN_CONSOLE_UNLOCKED();
3603 if (console_blanked
) {
3604 if (blank_state
== blank_vesa_wait
) {
3605 blank_state
= blank_off
;
3606 vc
->vc_sw
->con_blank(vc
, vesa_blank_mode
+ 1, 0);
3611 /* entering graphics mode? */
3615 vc
->vc_sw
->con_blank(vc
, -1, 1);
3616 console_blanked
= fg_console
+ 1;
3617 blank_state
= blank_off
;
3622 if (blank_state
!= blank_normal_wait
)
3624 blank_state
= blank_off
;
3626 /* don't blank graphics */
3627 if (vc
->vc_mode
!= KD_TEXT
) {
3628 console_blanked
= fg_console
+ 1;
3633 del_timer_sync(&console_timer
);
3634 blank_timer_expired
= 0;
3637 /* In case we need to reset origin, blanking hook returns 1 */
3638 i
= vc
->vc_sw
->con_blank(vc
, vesa_off_interval
? 1 : (vesa_blank_mode
+ 1), 0);
3639 console_blanked
= fg_console
+ 1;
3643 if (console_blank_hook
&& console_blank_hook(1))
3646 if (vesa_off_interval
&& vesa_blank_mode
) {
3647 blank_state
= blank_vesa_wait
;
3648 mod_timer(&console_timer
, jiffies
+ vesa_off_interval
);
3651 EXPORT_SYMBOL(do_blank_screen
);
3654 * Called by timer as well as from vt_console_driver
3656 void do_unblank_screen(int leaving_gfx
)
3660 /* This should now always be called from a "sane" (read: can schedule)
3661 * context for the sake of the low level drivers, except in the special
3662 * case of oops_in_progress
3664 if (!oops_in_progress
)
3667 WARN_CONSOLE_UNLOCKED();
3670 if (!console_blanked
)
3672 if (!vc_cons_allocated(fg_console
)) {
3674 printk("unblank_screen: tty %d not allocated ??\n", fg_console
+1);
3677 vc
= vc_cons
[fg_console
].d
;
3678 if (vc
->vc_mode
!= KD_TEXT
)
3679 return; /* but leave console_blanked != 0 */
3681 if (blankinterval
) {
3682 mod_timer(&console_timer
, jiffies
+ (blankinterval
* HZ
));
3683 blank_state
= blank_normal_wait
;
3686 console_blanked
= 0;
3687 if (vc
->vc_sw
->con_blank(vc
, 0, leaving_gfx
))
3688 /* Low-level driver cannot restore -> do it ourselves */
3690 if (console_blank_hook
)
3691 console_blank_hook(0);
3695 EXPORT_SYMBOL(do_unblank_screen
);
3698 * This is called by the outside world to cause a forced unblank, mostly for
3699 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
3700 * call it with 1 as an argument and so force a mode restore... that may kill
3701 * X or at least garbage the screen but would also make the Oops visible...
3703 void unblank_screen(void)
3705 do_unblank_screen(0);
3709 * We defer the timer blanking to work queue so it can take the console mutex
3710 * (console operations can still happen at irq time, but only from printk which
3711 * has the console mutex. Not perfect yet, but better than no locking
3713 static void blank_screen_t(unsigned long dummy
)
3715 if (unlikely(!keventd_up())) {
3716 mod_timer(&console_timer
, jiffies
+ (blankinterval
* HZ
));
3719 blank_timer_expired
= 1;
3720 schedule_work(&console_work
);
3723 void poke_blanked_console(void)
3725 WARN_CONSOLE_UNLOCKED();
3727 /* Add this so we quickly catch whoever might call us in a non
3728 * safe context. Nowadays, unblank_screen() isn't to be called in
3729 * atomic contexts and is allowed to schedule (with the special case
3730 * of oops_in_progress, but that isn't of any concern for this
3735 /* This isn't perfectly race free, but a race here would be mostly harmless,
3736 * at worse, we'll do a spurrious blank and it's unlikely
3738 del_timer(&console_timer
);
3739 blank_timer_expired
= 0;
3741 if (ignore_poke
|| !vc_cons
[fg_console
].d
|| vc_cons
[fg_console
].d
->vc_mode
== KD_GRAPHICS
)
3743 if (console_blanked
)
3745 else if (blankinterval
) {
3746 mod_timer(&console_timer
, jiffies
+ (blankinterval
* HZ
));
3747 blank_state
= blank_normal_wait
;
3755 static void set_palette(struct vc_data
*vc
)
3757 WARN_CONSOLE_UNLOCKED();
3759 if (vc
->vc_mode
!= KD_GRAPHICS
)
3760 vc
->vc_sw
->con_set_palette(vc
, color_table
);
3763 static int set_get_cmap(unsigned char __user
*arg
, int set
)
3767 WARN_CONSOLE_UNLOCKED();
3769 for (i
= 0; i
< 16; i
++)
3771 get_user(default_red
[i
], arg
++);
3772 get_user(default_grn
[i
], arg
++);
3773 get_user(default_blu
[i
], arg
++);
3775 put_user(default_red
[i
], arg
++);
3776 put_user(default_grn
[i
], arg
++);
3777 put_user(default_blu
[i
], arg
++);
3780 for (i
= 0; i
< MAX_NR_CONSOLES
; i
++)
3781 if (vc_cons_allocated(i
)) {
3782 for (j
= k
= 0; j
< 16; j
++) {
3783 vc_cons
[i
].d
->vc_palette
[k
++] = default_red
[j
];
3784 vc_cons
[i
].d
->vc_palette
[k
++] = default_grn
[j
];
3785 vc_cons
[i
].d
->vc_palette
[k
++] = default_blu
[j
];
3787 set_palette(vc_cons
[i
].d
);
3794 * Load palette into the DAC registers. arg points to a colour
3795 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
3798 int con_set_cmap(unsigned char __user
*arg
)
3802 acquire_console_sem();
3803 rc
= set_get_cmap (arg
,1);
3804 release_console_sem();
3809 int con_get_cmap(unsigned char __user
*arg
)
3813 acquire_console_sem();
3814 rc
= set_get_cmap (arg
,0);
3815 release_console_sem();
3820 void reset_palette(struct vc_data
*vc
)
3823 for (j
=k
=0; j
<16; j
++) {
3824 vc
->vc_palette
[k
++] = default_red
[j
];
3825 vc
->vc_palette
[k
++] = default_grn
[j
];
3826 vc
->vc_palette
[k
++] = default_blu
[j
];
3834 * Currently we only support fonts up to 32 pixels wide, at a maximum height
3835 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
3836 * depending on width) reserved for each character which is kinda wasty, but
3837 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
3838 * is upto the actual low-level console-driver convert data into its favorite
3839 * format (maybe we should add a `fontoffset' field to the `display'
3840 * structure so we won't have to convert the fontdata all the time.
3844 #define max_font_size 65536
3846 static int con_font_get(struct vc_data
*vc
, struct console_font_op
*op
)
3848 struct console_font font
;
3852 if (vc
->vc_mode
!= KD_TEXT
)
3856 font
.data
= kmalloc(max_font_size
, GFP_KERNEL
);
3862 acquire_console_sem();
3863 if (vc
->vc_sw
->con_font_get
)
3864 rc
= vc
->vc_sw
->con_font_get(vc
, &font
);
3867 release_console_sem();
3872 c
= (font
.width
+7)/8 * 32 * font
.charcount
;
3874 if (op
->data
&& font
.charcount
> op
->charcount
)
3876 if (!(op
->flags
& KD_FONT_FLAG_OLD
)) {
3877 if (font
.width
> op
->width
|| font
.height
> op
->height
)
3880 if (font
.width
!= 8)
3882 else if ((op
->height
&& font
.height
> op
->height
) ||
3889 op
->height
= font
.height
;
3890 op
->width
= font
.width
;
3891 op
->charcount
= font
.charcount
;
3893 if (op
->data
&& copy_to_user(op
->data
, font
.data
, c
))
3901 static int con_font_set(struct vc_data
*vc
, struct console_font_op
*op
)
3903 struct console_font font
;
3907 if (vc
->vc_mode
!= KD_TEXT
)
3911 if (op
->charcount
> 512)
3913 if (!op
->height
) { /* Need to guess font height [compat] */
3915 u8 __user
*charmap
= op
->data
;
3918 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
3919 so that we can get rid of this soon */
3920 if (!(op
->flags
& KD_FONT_FLAG_OLD
))
3922 for (h
= 32; h
> 0; h
--)
3923 for (i
= 0; i
< op
->charcount
; i
++) {
3924 if (get_user(tmp
, &charmap
[32*i
+h
-1]))
3933 if (op
->width
<= 0 || op
->width
> 32 || op
->height
> 32)
3935 size
= (op
->width
+7)/8 * 32 * op
->charcount
;
3936 if (size
> max_font_size
)
3938 font
.charcount
= op
->charcount
;
3939 font
.height
= op
->height
;
3940 font
.width
= op
->width
;
3941 font
.data
= kmalloc(size
, GFP_KERNEL
);
3944 if (copy_from_user(font
.data
, op
->data
, size
)) {
3948 acquire_console_sem();
3949 if (vc
->vc_sw
->con_font_set
)
3950 rc
= vc
->vc_sw
->con_font_set(vc
, &font
, op
->flags
);
3953 release_console_sem();
3958 static int con_font_default(struct vc_data
*vc
, struct console_font_op
*op
)
3960 struct console_font font
= {.width
= op
->width
, .height
= op
->height
};
3961 char name
[MAX_FONT_NAME
];
3965 if (vc
->vc_mode
!= KD_TEXT
)
3970 else if (strncpy_from_user(name
, op
->data
, MAX_FONT_NAME
- 1) < 0)
3973 name
[MAX_FONT_NAME
- 1] = 0;
3975 acquire_console_sem();
3976 if (vc
->vc_sw
->con_font_default
)
3977 rc
= vc
->vc_sw
->con_font_default(vc
, &font
, s
);
3980 release_console_sem();
3982 op
->width
= font
.width
;
3983 op
->height
= font
.height
;
3988 static int con_font_copy(struct vc_data
*vc
, struct console_font_op
*op
)
3990 int con
= op
->height
;
3993 if (vc
->vc_mode
!= KD_TEXT
)
3996 acquire_console_sem();
3997 if (!vc
->vc_sw
->con_font_copy
)
3999 else if (con
< 0 || !vc_cons_allocated(con
))
4001 else if (con
== vc
->vc_num
) /* nothing to do */
4004 rc
= vc
->vc_sw
->con_font_copy(vc
, con
);
4005 release_console_sem();
4009 int con_font_op(struct vc_data
*vc
, struct console_font_op
*op
)
4012 case KD_FONT_OP_SET
:
4013 return con_font_set(vc
, op
);
4014 case KD_FONT_OP_GET
:
4015 return con_font_get(vc
, op
);
4016 case KD_FONT_OP_SET_DEFAULT
:
4017 return con_font_default(vc
, op
);
4018 case KD_FONT_OP_COPY
:
4019 return con_font_copy(vc
, op
);
4025 * Interface exported to selection and vcs.
4028 /* used by selection */
4029 u16
screen_glyph(struct vc_data
*vc
, int offset
)
4031 u16 w
= scr_readw(screenpos(vc
, offset
, 1));
4034 if (w
& vc
->vc_hi_font_mask
)
4038 EXPORT_SYMBOL_GPL(screen_glyph
);
4040 /* used by vcs - note the word offset */
4041 unsigned short *screen_pos(struct vc_data
*vc
, int w_offset
, int viewed
)
4043 return screenpos(vc
, 2 * w_offset
, viewed
);
4046 void getconsxy(struct vc_data
*vc
, unsigned char *p
)
4052 void putconsxy(struct vc_data
*vc
, unsigned char *p
)
4055 gotoxy(vc
, p
[0], p
[1]);
4059 u16
vcs_scr_readw(struct vc_data
*vc
, const u16
*org
)
4061 if ((unsigned long)org
== vc
->vc_pos
&& softcursor_original
!= -1)
4062 return softcursor_original
;
4063 return scr_readw(org
);
4066 void vcs_scr_writew(struct vc_data
*vc
, u16 val
, u16
*org
)
4068 scr_writew(val
, org
);
4069 if ((unsigned long)org
== vc
->vc_pos
) {
4070 softcursor_original
= -1;
4076 * Visible symbols for modules
4079 EXPORT_SYMBOL(color_table
);
4080 EXPORT_SYMBOL(default_red
);
4081 EXPORT_SYMBOL(default_grn
);
4082 EXPORT_SYMBOL(default_blu
);
4083 EXPORT_SYMBOL(update_region
);
4084 EXPORT_SYMBOL(redraw_screen
);
4085 EXPORT_SYMBOL(vc_resize
);
4086 EXPORT_SYMBOL(fg_console
);
4087 EXPORT_SYMBOL(console_blank_hook
);
4088 EXPORT_SYMBOL(console_blanked
);
4089 EXPORT_SYMBOL(vc_cons
);
4090 #ifndef VT_SINGLE_DRIVER
4091 EXPORT_SYMBOL(take_over_console
);
4092 EXPORT_SYMBOL(give_up_console
);