2 * Copyright (C) 1991, 1992 Linus Torvalds
6 * Hopefully this will be a rather complete VT102 implementation.
8 * Beeping thanks to John T Kohl.
10 * Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics
11 * Chars, and VT100 enhancements by Peter MacDonald.
13 * Copy and paste function by Andrew Haylett,
14 * some enhancements by Alessandro Rubini.
16 * Code to check for different video-cards mostly by Galen Hunt,
17 * <g-hunt@ee.utah.edu>
19 * Rudimentary ISO 10646/Unicode/UTF-8 character set support by
20 * Markus Kuhn, <mskuhn@immd4.informatik.uni-erlangen.de>.
22 * Dynamic allocation of consoles, aeb@cwi.nl, May 1994
23 * Resizing of consoles, aeb, 940926
25 * Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94
28 * User-defined bell sound, new setterm control sequences and printk
29 * redirection by Martin Mares <mj@k332.feld.cvut.cz> 19-Nov-95
31 * APM screenblank bug fixed Takashi Manabe <manabe@roy.dsl.tutics.tut.jp>
33 * Merge with the abstract console driver by Geert Uytterhoeven
34 * <geert@linux-m68k.org>, Jan 1997.
36 * Original m68k console driver modifications by
38 * - Arno Griffioen <arno@usn.nl>
39 * - David Carter <carter@cs.bris.ac.uk>
41 * The abstract console driver provides a generic interface for a text
42 * console. It supports VGA text mode, frame buffer based graphical consoles
43 * and special graphics processors that are only accessible through some
44 * registers (e.g. a TMS340x0 GSP).
46 * The interface to the hardware is specified using a special structure
47 * (struct consw) which contains function pointers to console operations
48 * (see <linux/console.h> for more information).
50 * Support for changeable cursor shape
51 * by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997
53 * Ported to i386 and con_scrolldelta fixed
54 * by Emmanuel Marty <core@ggi-project.org>, April 1998
56 * Resurrected character buffers in videoram plus lots of other trickery
57 * by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998
59 * Removed old-style timers, introduced console_timer, made timer
60 * deletion SMP-safe. 17Jun00, Andrew Morton
62 * Removed console_lock, enabled interrupts across all console operations
63 * 13 March 2001, Andrew Morton
65 * Fixed UTF-8 mode so alternate charset modes always work according
66 * to control sequences interpreted in do_con_trol function
67 * preserving backward VT100 semigraphics compatibility,
68 * malformed UTF sequences represented as sequences of replacement glyphs,
69 * original codes or '?' as a last resort if replacement glyph is undefined
70 * by Adam Tla/lka <atlka@pg.gda.pl>, Aug 2006
73 #include <linux/module.h>
74 #include <linux/types.h>
75 #include <linux/sched.h>
76 #include <linux/tty.h>
77 #include <linux/tty_flip.h>
78 #include <linux/kernel.h>
79 #include <linux/string.h>
80 #include <linux/errno.h>
82 #include <linux/slab.h>
83 #include <linux/major.h>
85 #include <linux/console.h>
86 #include <linux/init.h>
87 #include <linux/mutex.h>
88 #include <linux/vt_kern.h>
89 #include <linux/selection.h>
90 #include <linux/tiocl.h>
91 #include <linux/kbd_kern.h>
92 #include <linux/consolemap.h>
93 #include <linux/timer.h>
94 #include <linux/interrupt.h>
95 #include <linux/workqueue.h>
97 #include <linux/font.h>
98 #include <linux/bitops.h>
99 #include <linux/notifier.h>
100 #include <linux/device.h>
101 #include <linux/io.h>
102 #include <linux/uaccess.h>
103 #include <linux/kdb.h>
104 #include <linux/ctype.h>
106 #define MAX_NR_CON_DRIVER 16
108 #define CON_DRIVER_FLAG_MODULE 1
109 #define CON_DRIVER_FLAG_INIT 2
110 #define CON_DRIVER_FLAG_ATTR 4
113 const struct consw
*con
;
122 static struct con_driver registered_con_driver
[MAX_NR_CON_DRIVER
];
123 const struct consw
*conswitchp
;
125 /* A bitmap for codes <32. A bit of 1 indicates that the code
126 * corresponding to that bit number invokes some special action
127 * (such as cursor movement) and should not be displayed as a
128 * glyph unless the disp_ctrl mode is explicitly enabled.
130 #define CTRL_ACTION 0x0d00ff81
131 #define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */
134 * Here is the default bell parameters: 750HZ, 1/8th of a second
136 #define DEFAULT_BELL_PITCH 750
137 #define DEFAULT_BELL_DURATION (HZ/8)
139 struct vc vc_cons
[MAX_NR_CONSOLES
];
141 #ifndef VT_SINGLE_DRIVER
142 static const struct consw
*con_driver_map
[MAX_NR_CONSOLES
];
145 static int con_open(struct tty_struct
*, struct file
*);
146 static void vc_init(struct vc_data
*vc
, unsigned int rows
,
147 unsigned int cols
, int do_clear
);
148 static void gotoxy(struct vc_data
*vc
, int new_x
, int new_y
);
149 static void save_cur(struct vc_data
*vc
);
150 static void reset_terminal(struct vc_data
*vc
, int do_clear
);
151 static void con_flush_chars(struct tty_struct
*tty
);
152 static int set_vesa_blanking(char __user
*p
);
153 static void set_cursor(struct vc_data
*vc
);
154 static void hide_cursor(struct vc_data
*vc
);
155 static void console_callback(struct work_struct
*ignored
);
156 static void blank_screen_t(unsigned long dummy
);
157 static void set_palette(struct vc_data
*vc
);
159 static int printable
; /* Is console ready for printing? */
160 int default_utf8
= true;
161 module_param(default_utf8
, int, S_IRUGO
| S_IWUSR
);
162 int global_cursor_default
= -1;
163 module_param(global_cursor_default
, int, S_IRUGO
| S_IWUSR
);
165 static int cur_default
= CUR_DEFAULT
;
166 module_param(cur_default
, int, S_IRUGO
| S_IWUSR
);
169 * ignore_poke: don't unblank the screen when things are typed. This is
170 * mainly for the privacy of braille terminal users.
172 static int ignore_poke
;
174 int do_poke_blanked_console
;
177 static int vesa_blank_mode
; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
178 static int vesa_off_interval
;
179 static int blankinterval
= 10*60;
180 core_param(consoleblank
, blankinterval
, int, 0444);
182 static DECLARE_WORK(console_work
, console_callback
);
185 * fg_console is the current virtual console,
186 * last_console is the last used one,
187 * want_console is the console we want to switch to,
188 * saved_* variants are for save/restore around kernel debugger enter/leave
192 int want_console
= -1;
193 static int saved_fg_console
;
194 static int saved_last_console
;
195 static int saved_want_console
;
196 static int saved_vc_mode
;
197 static int saved_console_blanked
;
200 * For each existing display, we have a pointer to console currently visible
201 * on that display, allowing consoles other than fg_console to be refreshed
202 * appropriately. Unless the low-level driver supplies its own display_fg
203 * variable, we use this one for the "master display".
205 static struct vc_data
*master_display_fg
;
208 * Unfortunately, we need to delay tty echo when we're currently writing to the
209 * console since the code is (and always was) not re-entrant, so we schedule
210 * all flip requests to process context with schedule-task() and run it from
211 * console_callback().
215 * For the same reason, we defer scrollback to the console callback.
217 static int scrollback_delta
;
220 * Hook so that the power management routines can (un)blank
221 * the console on our behalf.
223 int (*console_blank_hook
)(int);
225 static DEFINE_TIMER(console_timer
, blank_screen_t
, 0, 0);
226 static int blank_state
;
227 static int blank_timer_expired
;
235 * /sys/class/tty/tty0/
237 * the attribute 'active' contains the name of the current vc
238 * console and it supports poll() to detect vc switches
240 static struct device
*tty0dev
;
243 * Notifier list for console events.
245 static ATOMIC_NOTIFIER_HEAD(vt_notifier_list
);
247 int register_vt_notifier(struct notifier_block
*nb
)
249 return atomic_notifier_chain_register(&vt_notifier_list
, nb
);
251 EXPORT_SYMBOL_GPL(register_vt_notifier
);
253 int unregister_vt_notifier(struct notifier_block
*nb
)
255 return atomic_notifier_chain_unregister(&vt_notifier_list
, nb
);
257 EXPORT_SYMBOL_GPL(unregister_vt_notifier
);
259 static void notify_write(struct vc_data
*vc
, unsigned int unicode
)
261 struct vt_notifier_param param
= { .vc
= vc
, .c
= unicode
};
262 atomic_notifier_call_chain(&vt_notifier_list
, VT_WRITE
, ¶m
);
265 static void notify_update(struct vc_data
*vc
)
267 struct vt_notifier_param param
= { .vc
= vc
};
268 atomic_notifier_call_chain(&vt_notifier_list
, VT_UPDATE
, ¶m
);
271 * Low-Level Functions
274 #define IS_FG(vc) ((vc)->vc_num == fg_console)
276 #ifdef VT_BUF_VRAM_ONLY
277 #define DO_UPDATE(vc) 0
279 #define DO_UPDATE(vc) (CON_IS_VISIBLE(vc) && !console_blanked)
282 static inline unsigned short *screenpos(struct vc_data
*vc
, int offset
, int viewed
)
287 p
= (unsigned short *)(vc
->vc_origin
+ offset
);
288 else if (!vc
->vc_sw
->con_screen_pos
)
289 p
= (unsigned short *)(vc
->vc_visible_origin
+ offset
);
291 p
= vc
->vc_sw
->con_screen_pos(vc
, offset
);
295 /* Called from the keyboard irq path.. */
296 static inline void scrolldelta(int lines
)
299 /* scrolldelta needs some kind of consistency lock, but the BKL was
300 and still is not protecting versus the scheduled back end */
301 scrollback_delta
+= lines
;
302 schedule_console_callback();
305 void schedule_console_callback(void)
307 schedule_work(&console_work
);
310 static void scrup(struct vc_data
*vc
, unsigned int t
, unsigned int b
, int nr
)
312 unsigned short *d
, *s
;
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_UP
, nr
))
320 d
= (unsigned short *)(vc
->vc_origin
+ vc
->vc_size_row
* t
);
321 s
= (unsigned short *)(vc
->vc_origin
+ vc
->vc_size_row
* (t
+ nr
));
322 scr_memmovew(d
, s
, (b
- t
- nr
) * vc
->vc_size_row
);
323 scr_memsetw(d
+ (b
- t
- nr
) * vc
->vc_cols
, vc
->vc_video_erase_char
,
324 vc
->vc_size_row
* nr
);
327 static void scrdown(struct vc_data
*vc
, unsigned int t
, unsigned int b
, int nr
)
334 if (b
> vc
->vc_rows
|| t
>= b
|| nr
< 1)
336 if (CON_IS_VISIBLE(vc
) && vc
->vc_sw
->con_scroll(vc
, t
, b
, SM_DOWN
, nr
))
338 s
= (unsigned short *)(vc
->vc_origin
+ vc
->vc_size_row
* t
);
339 step
= vc
->vc_cols
* nr
;
340 scr_memmovew(s
+ step
, s
, (b
- t
- nr
) * vc
->vc_size_row
);
341 scr_memsetw(s
, vc
->vc_video_erase_char
, 2 * step
);
344 static void do_update_region(struct vc_data
*vc
, unsigned long start
, int count
)
346 #ifndef VT_BUF_VRAM_ONLY
347 unsigned int xx
, yy
, offset
;
351 if (!vc
->vc_sw
->con_getxy
) {
352 offset
= (start
- vc
->vc_origin
) / 2;
353 xx
= offset
% vc
->vc_cols
;
354 yy
= offset
/ vc
->vc_cols
;
357 start
= vc
->vc_sw
->con_getxy(vc
, start
, &nxx
, &nyy
);
361 u16 attrib
= scr_readw(p
) & 0xff00;
364 while (xx
< vc
->vc_cols
&& count
) {
365 if (attrib
!= (scr_readw(p
) & 0xff00)) {
367 vc
->vc_sw
->con_putcs(vc
, q
, p
-q
, yy
, startx
);
370 attrib
= scr_readw(p
) & 0xff00;
377 vc
->vc_sw
->con_putcs(vc
, q
, p
-q
, yy
, startx
);
382 if (vc
->vc_sw
->con_getxy
) {
384 start
= vc
->vc_sw
->con_getxy(vc
, start
, NULL
, NULL
);
390 void update_region(struct vc_data
*vc
, unsigned long start
, int count
)
392 WARN_CONSOLE_UNLOCKED();
396 do_update_region(vc
, start
, count
);
401 /* Structure of attributes is hardware-dependent */
403 static u8
build_attr(struct vc_data
*vc
, u8 _color
, u8 _intensity
, u8 _blink
,
404 u8 _underline
, u8 _reverse
, u8 _italic
)
406 if (vc
->vc_sw
->con_build_attr
)
407 return vc
->vc_sw
->con_build_attr(vc
, _color
, _intensity
,
408 _blink
, _underline
, _reverse
, _italic
);
410 #ifndef VT_BUF_VRAM_ONLY
412 * ++roman: I completely changed the attribute format for monochrome
413 * mode (!can_do_color). The formerly used MDA (monochrome display
414 * adapter) format didn't allow the combination of certain effects.
415 * Now the attribute is just a bit vector:
416 * Bit 0..1: intensity (0..2)
423 if (!vc
->vc_can_do_color
)
426 (_underline
? 4 : 0) |
430 a
= (a
& 0xF0) | vc
->vc_itcolor
;
432 a
= (a
& 0xf0) | vc
->vc_ulcolor
;
433 else if (_intensity
== 0)
434 a
= (a
& 0xf0) | vc
->vc_ulcolor
;
436 a
= ((a
) & 0x88) | ((((a
) >> 4) | ((a
) << 4)) & 0x77);
441 if (vc
->vc_hi_font_mask
== 0x100)
450 static void update_attr(struct vc_data
*vc
)
452 vc
->vc_attr
= build_attr(vc
, vc
->vc_color
, vc
->vc_intensity
,
453 vc
->vc_blink
, vc
->vc_underline
,
454 vc
->vc_reverse
^ vc
->vc_decscnm
, vc
->vc_italic
);
455 vc
->vc_video_erase_char
= (build_attr(vc
, vc
->vc_color
, 1, vc
->vc_blink
, 0, vc
->vc_decscnm
, 0) << 8) | ' ';
458 /* Note: inverting the screen twice should revert to the original state */
459 void invert_screen(struct vc_data
*vc
, int offset
, int count
, int viewed
)
463 WARN_CONSOLE_UNLOCKED();
466 p
= screenpos(vc
, offset
, viewed
);
467 if (vc
->vc_sw
->con_invert_region
)
468 vc
->vc_sw
->con_invert_region(vc
, p
, count
);
469 #ifndef VT_BUF_VRAM_ONLY
475 if (!vc
->vc_can_do_color
) {
482 } else if (vc
->vc_hi_font_mask
== 0x100) {
485 a
= ((a
) & 0x11ff) | (((a
) & 0xe000) >> 4) | (((a
) & 0x0e00) << 4);
492 a
= ((a
) & 0x88ff) | (((a
) & 0x7000) >> 4) | (((a
) & 0x0700) << 4);
500 do_update_region(vc
, (unsigned long) p
, count
);
503 /* used by selection: complement pointer position */
504 void complement_pos(struct vc_data
*vc
, int offset
)
506 static int old_offset
= -1;
507 static unsigned short old
;
508 static unsigned short oldx
, oldy
;
510 WARN_CONSOLE_UNLOCKED();
512 if (old_offset
!= -1 && old_offset
>= 0 &&
513 old_offset
< vc
->vc_screenbuf_size
) {
514 scr_writew(old
, screenpos(vc
, old_offset
, 1));
516 vc
->vc_sw
->con_putc(vc
, old
, oldy
, oldx
);
521 if (offset
!= -1 && offset
>= 0 &&
522 offset
< vc
->vc_screenbuf_size
) {
525 p
= screenpos(vc
, offset
, 1);
527 new = old
^ vc
->vc_complement_mask
;
530 oldx
= (offset
>> 1) % vc
->vc_cols
;
531 oldy
= (offset
>> 1) / vc
->vc_cols
;
532 vc
->vc_sw
->con_putc(vc
, new, oldy
, oldx
);
538 static void insert_char(struct vc_data
*vc
, unsigned int nr
)
540 unsigned short *p
, *q
= (unsigned short *)vc
->vc_pos
;
542 p
= q
+ vc
->vc_cols
- nr
- vc
->vc_x
;
544 scr_writew(scr_readw(p
), p
+ nr
);
545 scr_memsetw(q
, vc
->vc_video_erase_char
, nr
* 2);
546 vc
->vc_need_wrap
= 0;
548 unsigned short oldattr
= vc
->vc_attr
;
549 vc
->vc_sw
->con_bmove(vc
, vc
->vc_y
, vc
->vc_x
, vc
->vc_y
, vc
->vc_x
+ nr
, 1,
550 vc
->vc_cols
- vc
->vc_x
- nr
);
551 vc
->vc_attr
= vc
->vc_video_erase_char
>> 8;
553 vc
->vc_sw
->con_putc(vc
, vc
->vc_video_erase_char
, vc
->vc_y
, vc
->vc_x
+ nr
);
554 vc
->vc_attr
= oldattr
;
558 static void delete_char(struct vc_data
*vc
, unsigned int nr
)
560 unsigned int i
= vc
->vc_x
;
561 unsigned short *p
= (unsigned short *)vc
->vc_pos
;
563 while (++i
<= vc
->vc_cols
- nr
) {
564 scr_writew(scr_readw(p
+nr
), p
);
567 scr_memsetw(p
, vc
->vc_video_erase_char
, nr
* 2);
568 vc
->vc_need_wrap
= 0;
570 unsigned short oldattr
= vc
->vc_attr
;
571 vc
->vc_sw
->con_bmove(vc
, vc
->vc_y
, vc
->vc_x
+ nr
, vc
->vc_y
, vc
->vc_x
, 1,
572 vc
->vc_cols
- vc
->vc_x
- nr
);
573 vc
->vc_attr
= vc
->vc_video_erase_char
>> 8;
575 vc
->vc_sw
->con_putc(vc
, vc
->vc_video_erase_char
, vc
->vc_y
,
576 vc
->vc_cols
- 1 - nr
);
577 vc
->vc_attr
= oldattr
;
581 static int softcursor_original
;
583 static void add_softcursor(struct vc_data
*vc
)
585 int i
= scr_readw((u16
*) vc
->vc_pos
);
586 u32 type
= vc
->vc_cursor_type
;
588 if (! (type
& 0x10)) return;
589 if (softcursor_original
!= -1) return;
590 softcursor_original
= i
;
591 i
|= ((type
>> 8) & 0xff00 );
592 i
^= ((type
) & 0xff00 );
593 if ((type
& 0x20) && ((softcursor_original
& 0x7000) == (i
& 0x7000))) i
^= 0x7000;
594 if ((type
& 0x40) && ((i
& 0x700) == ((i
& 0x7000) >> 4))) i
^= 0x0700;
595 scr_writew(i
, (u16
*) vc
->vc_pos
);
597 vc
->vc_sw
->con_putc(vc
, i
, vc
->vc_y
, vc
->vc_x
);
600 static void hide_softcursor(struct vc_data
*vc
)
602 if (softcursor_original
!= -1) {
603 scr_writew(softcursor_original
, (u16
*)vc
->vc_pos
);
605 vc
->vc_sw
->con_putc(vc
, softcursor_original
,
607 softcursor_original
= -1;
611 static void hide_cursor(struct vc_data
*vc
)
615 vc
->vc_sw
->con_cursor(vc
, CM_ERASE
);
619 static void set_cursor(struct vc_data
*vc
)
621 if (!IS_FG(vc
) || console_blanked
||
622 vc
->vc_mode
== KD_GRAPHICS
)
628 if ((vc
->vc_cursor_type
& 0x0f) != 1)
629 vc
->vc_sw
->con_cursor(vc
, CM_DRAW
);
634 static void set_origin(struct vc_data
*vc
)
636 WARN_CONSOLE_UNLOCKED();
638 if (!CON_IS_VISIBLE(vc
) ||
639 !vc
->vc_sw
->con_set_origin
||
640 !vc
->vc_sw
->con_set_origin(vc
))
641 vc
->vc_origin
= (unsigned long)vc
->vc_screenbuf
;
642 vc
->vc_visible_origin
= vc
->vc_origin
;
643 vc
->vc_scr_end
= vc
->vc_origin
+ vc
->vc_screenbuf_size
;
644 vc
->vc_pos
= vc
->vc_origin
+ vc
->vc_size_row
* vc
->vc_y
+ 2 * vc
->vc_x
;
647 static inline void save_screen(struct vc_data
*vc
)
649 WARN_CONSOLE_UNLOCKED();
651 if (vc
->vc_sw
->con_save_screen
)
652 vc
->vc_sw
->con_save_screen(vc
);
656 * Redrawing of screen
659 static void clear_buffer_attributes(struct vc_data
*vc
)
661 unsigned short *p
= (unsigned short *)vc
->vc_origin
;
662 int count
= vc
->vc_screenbuf_size
/ 2;
663 int mask
= vc
->vc_hi_font_mask
| 0xff;
665 for (; count
> 0; count
--, p
++) {
666 scr_writew((scr_readw(p
)&mask
) | (vc
->vc_video_erase_char
& ~mask
), p
);
670 void redraw_screen(struct vc_data
*vc
, int is_switch
)
674 WARN_CONSOLE_UNLOCKED();
678 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
683 struct vc_data
*old_vc
= vc_cons
[fg_console
].d
;
686 if (!CON_IS_VISIBLE(vc
))
688 *vc
->vc_display_fg
= vc
;
689 fg_console
= vc
->vc_num
;
691 if (!CON_IS_VISIBLE(old_vc
)) {
696 sysfs_notify(&tty0dev
->kobj
, NULL
, "active");
704 int old_was_color
= vc
->vc_can_do_color
;
707 update
= vc
->vc_sw
->con_switch(vc
);
710 * If console changed from mono<->color, the best we can do
711 * is to clear the buffer attributes. As it currently stands,
712 * rebuilding new attributes from the old buffer is not doable
713 * without overly complex code.
715 if (old_was_color
!= vc
->vc_can_do_color
) {
717 clear_buffer_attributes(vc
);
720 /* Forcibly update if we're panicing */
721 if ((update
&& vc
->vc_mode
!= KD_GRAPHICS
) ||
722 vt_force_oops_output(vc
))
723 do_update_region(vc
, vc
->vc_origin
, vc
->vc_screenbuf_size
/ 2);
728 compute_shiftstate();
734 * Allocation, freeing and resizing of VTs.
737 int vc_cons_allocated(unsigned int i
)
739 return (i
< MAX_NR_CONSOLES
&& vc_cons
[i
].d
);
742 static void visual_init(struct vc_data
*vc
, int num
, int init
)
744 /* ++Geert: vc->vc_sw->con_init determines console size */
746 module_put(vc
->vc_sw
->owner
);
747 vc
->vc_sw
= conswitchp
;
748 #ifndef VT_SINGLE_DRIVER
749 if (con_driver_map
[num
])
750 vc
->vc_sw
= con_driver_map
[num
];
752 __module_get(vc
->vc_sw
->owner
);
754 vc
->vc_display_fg
= &master_display_fg
;
755 vc
->vc_uni_pagedir_loc
= &vc
->vc_uni_pagedir
;
756 vc
->vc_uni_pagedir
= 0;
757 vc
->vc_hi_font_mask
= 0;
758 vc
->vc_complement_mask
= 0;
759 vc
->vc_can_do_color
= 0;
760 vc
->vc_panic_force_write
= false;
761 vc
->vc_sw
->con_init(vc
, init
);
762 if (!vc
->vc_complement_mask
)
763 vc
->vc_complement_mask
= vc
->vc_can_do_color
? 0x7700 : 0x0800;
764 vc
->vc_s_complement_mask
= vc
->vc_complement_mask
;
765 vc
->vc_size_row
= vc
->vc_cols
<< 1;
766 vc
->vc_screenbuf_size
= vc
->vc_rows
* vc
->vc_size_row
;
769 int vc_allocate(unsigned int currcons
) /* return 0 on success */
771 WARN_CONSOLE_UNLOCKED();
773 if (currcons
>= MAX_NR_CONSOLES
)
775 if (!vc_cons
[currcons
].d
) {
777 struct vt_notifier_param param
;
779 /* prevent users from taking too much memory */
780 if (currcons
>= MAX_NR_USER_CONSOLES
&& !capable(CAP_SYS_RESOURCE
))
783 /* due to the granularity of kmalloc, we waste some memory here */
784 /* the alloc is done in two steps, to optimize the common situation
785 of a 25x80 console (structsize=216, screenbuf_size=4000) */
786 /* although the numbers above are not valid since long ago, the
787 point is still up-to-date and the comment still has its value
788 even if only as a historical artifact. --mj, July 1998 */
789 param
.vc
= vc
= kzalloc(sizeof(struct vc_data
), GFP_KERNEL
);
792 vc_cons
[currcons
].d
= vc
;
793 tty_port_init(&vc
->port
);
794 INIT_WORK(&vc_cons
[currcons
].SAK_work
, vc_SAK
);
795 visual_init(vc
, currcons
, 1);
796 if (!*vc
->vc_uni_pagedir_loc
)
797 con_set_default_unimap(vc
);
798 vc
->vc_screenbuf
= kmalloc(vc
->vc_screenbuf_size
, GFP_KERNEL
);
799 if (!vc
->vc_screenbuf
) {
801 vc_cons
[currcons
].d
= NULL
;
805 /* If no drivers have overridden us and the user didn't pass a
806 boot option, default to displaying the cursor */
807 if (global_cursor_default
== -1)
808 global_cursor_default
= 1;
810 vc_init(vc
, vc
->vc_rows
, vc
->vc_cols
, 1);
811 vcs_make_sysfs(currcons
);
812 atomic_notifier_call_chain(&vt_notifier_list
, VT_ALLOCATE
, ¶m
);
817 static inline int resize_screen(struct vc_data
*vc
, int width
, int height
,
820 /* Resizes the resolution of the display adapater */
823 if (vc
->vc_mode
!= KD_GRAPHICS
&& vc
->vc_sw
->con_resize
)
824 err
= vc
->vc_sw
->con_resize(vc
, width
, height
, user
);
830 * Change # of rows and columns (0 means unchanged/the size of fg_console)
831 * [this is to be used together with some user program
832 * like resize that changes the hardware videomode]
834 #define VC_RESIZE_MAXCOL (32767)
835 #define VC_RESIZE_MAXROW (32767)
838 * vc_do_resize - resizing method for the tty
839 * @tty: tty being resized
840 * @real_tty: real tty (different to tty if a pty/tty pair)
841 * @vc: virtual console private data
845 * Resize a virtual console, clipping according to the actual constraints.
846 * If the caller passes a tty structure then update the termios winsize
847 * information and perform any necessary signal handling.
849 * Caller must hold the console semaphore. Takes the termios mutex and
850 * ctrl_lock of the tty IFF a tty is passed.
853 static int vc_do_resize(struct tty_struct
*tty
, struct vc_data
*vc
,
854 unsigned int cols
, unsigned int lines
)
856 unsigned long old_origin
, new_origin
, new_scr_end
, rlth
, rrem
, err
= 0;
858 unsigned int old_rows
, old_row_size
;
859 unsigned int new_cols
, new_rows
, new_row_size
, new_screen_size
;
861 unsigned short *newscreen
;
863 WARN_CONSOLE_UNLOCKED();
868 user
= vc
->vc_resize_user
;
869 vc
->vc_resize_user
= 0;
871 if (cols
> VC_RESIZE_MAXCOL
|| lines
> VC_RESIZE_MAXROW
)
874 new_cols
= (cols
? cols
: vc
->vc_cols
);
875 new_rows
= (lines
? lines
: vc
->vc_rows
);
876 new_row_size
= new_cols
<< 1;
877 new_screen_size
= new_row_size
* new_rows
;
879 if (new_cols
== vc
->vc_cols
&& new_rows
== vc
->vc_rows
)
882 newscreen
= kmalloc(new_screen_size
, GFP_USER
);
886 old_rows
= vc
->vc_rows
;
887 old_row_size
= vc
->vc_size_row
;
889 err
= resize_screen(vc
, new_cols
, new_rows
, user
);
895 vc
->vc_rows
= new_rows
;
896 vc
->vc_cols
= new_cols
;
897 vc
->vc_size_row
= new_row_size
;
898 vc
->vc_screenbuf_size
= new_screen_size
;
900 rlth
= min(old_row_size
, new_row_size
);
901 rrem
= new_row_size
- rlth
;
902 old_origin
= vc
->vc_origin
;
903 new_origin
= (long) newscreen
;
904 new_scr_end
= new_origin
+ new_screen_size
;
906 if (vc
->vc_y
> new_rows
) {
907 if (old_rows
- vc
->vc_y
< new_rows
) {
909 * Cursor near the bottom, copy contents from the
912 old_origin
+= (old_rows
- new_rows
) * old_row_size
;
915 * Cursor is in no man's land, copy 1/2 screenful
916 * from the top and bottom of cursor position
918 old_origin
+= (vc
->vc_y
- new_rows
/2) * old_row_size
;
922 end
= old_origin
+ old_row_size
* min(old_rows
, new_rows
);
926 while (old_origin
< end
) {
927 scr_memcpyw((unsigned short *) new_origin
,
928 (unsigned short *) old_origin
, rlth
);
930 scr_memsetw((void *)(new_origin
+ rlth
),
931 vc
->vc_video_erase_char
, rrem
);
932 old_origin
+= old_row_size
;
933 new_origin
+= new_row_size
;
935 if (new_scr_end
> new_origin
)
936 scr_memsetw((void *)new_origin
, vc
->vc_video_erase_char
,
937 new_scr_end
- new_origin
);
938 kfree(vc
->vc_screenbuf
);
939 vc
->vc_screenbuf
= newscreen
;
940 vc
->vc_screenbuf_size
= new_screen_size
;
943 /* do part of a reset_terminal() */
945 vc
->vc_bottom
= vc
->vc_rows
;
946 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
);
950 /* Rewrite the requested winsize data with the actual
953 memset(&ws
, 0, sizeof(ws
));
954 ws
.ws_row
= vc
->vc_rows
;
955 ws
.ws_col
= vc
->vc_cols
;
956 ws
.ws_ypixel
= vc
->vc_scan_lines
;
957 tty_do_resize(tty
, &ws
);
960 if (CON_IS_VISIBLE(vc
))
962 vt_event_post(VT_EVENT_RESIZE
, vc
->vc_num
, vc
->vc_num
);
967 * vc_resize - resize a VT
968 * @vc: virtual console
972 * Resize a virtual console as seen from the console end of things. We
973 * use the common vc_do_resize methods to update the structures. The
974 * caller must hold the console sem to protect console internals and
978 int vc_resize(struct vc_data
*vc
, unsigned int cols
, unsigned int rows
)
980 return vc_do_resize(vc
->port
.tty
, vc
, cols
, rows
);
984 * vt_resize - resize a VT
985 * @tty: tty to resize
986 * @ws: winsize attributes
988 * Resize a virtual terminal. This is called by the tty layer as we
989 * register our own handler for resizing. The mutual helper does all
992 * Takes the console sem and the called methods then take the tty
993 * termios_mutex and the tty ctrl_lock in that order.
995 static int vt_resize(struct tty_struct
*tty
, struct winsize
*ws
)
997 struct vc_data
*vc
= tty
->driver_data
;
1001 ret
= vc_do_resize(tty
, vc
, ws
->ws_col
, ws
->ws_row
);
1006 void vc_deallocate(unsigned int currcons
)
1008 WARN_CONSOLE_UNLOCKED();
1010 if (vc_cons_allocated(currcons
)) {
1011 struct vc_data
*vc
= vc_cons
[currcons
].d
;
1012 struct vt_notifier_param param
= { .vc
= vc
};
1014 atomic_notifier_call_chain(&vt_notifier_list
, VT_DEALLOCATE
, ¶m
);
1015 vcs_remove_sysfs(currcons
);
1016 vc
->vc_sw
->con_deinit(vc
);
1017 put_pid(vc
->vt_pid
);
1018 module_put(vc
->vc_sw
->owner
);
1019 kfree(vc
->vc_screenbuf
);
1020 if (currcons
>= MIN_NR_CONSOLES
)
1022 vc_cons
[currcons
].d
= NULL
;
1030 #define set_kbd(vc, x) vt_set_kbd_mode_bit((vc)->vc_num, (x))
1031 #define clr_kbd(vc, x) vt_clr_kbd_mode_bit((vc)->vc_num, (x))
1032 #define is_kbd(vc, x) vt_get_kbd_mode_bit((vc)->vc_num, (x))
1034 #define decarm VC_REPEAT
1035 #define decckm VC_CKMODE
1036 #define kbdapplic VC_APPLIC
1040 * this is what the terminal answers to a ESC-Z or csi0c query.
1042 #define VT100ID "\033[?1;2c"
1043 #define VT102ID "\033[?6c"
1045 unsigned char color_table
[] = { 0, 4, 2, 6, 1, 5, 3, 7,
1046 8,12,10,14, 9,13,11,15 };
1048 /* the default colour table, for VGA+ colour systems */
1049 int default_red
[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
1050 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
1051 int default_grn
[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
1052 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
1053 int default_blu
[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
1054 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
1056 module_param_array(default_red
, int, NULL
, S_IRUGO
| S_IWUSR
);
1057 module_param_array(default_grn
, int, NULL
, S_IRUGO
| S_IWUSR
);
1058 module_param_array(default_blu
, int, NULL
, S_IRUGO
| S_IWUSR
);
1061 * gotoxy() must verify all boundaries, because the arguments
1062 * might also be negative. If the given position is out of
1063 * bounds, the cursor is placed at the nearest margin.
1065 static void gotoxy(struct vc_data
*vc
, int new_x
, int new_y
)
1072 if (new_x
>= vc
->vc_cols
)
1073 vc
->vc_x
= vc
->vc_cols
- 1;
1080 max_y
= vc
->vc_bottom
;
1083 max_y
= vc
->vc_rows
;
1087 else if (new_y
>= max_y
)
1088 vc
->vc_y
= max_y
- 1;
1091 vc
->vc_pos
= vc
->vc_origin
+ vc
->vc_y
* vc
->vc_size_row
+ (vc
->vc_x
<<1);
1092 vc
->vc_need_wrap
= 0;
1095 /* for absolute user moves, when decom is set */
1096 static void gotoxay(struct vc_data
*vc
, int new_x
, int new_y
)
1098 gotoxy(vc
, new_x
, vc
->vc_decom
? (vc
->vc_top
+ new_y
) : new_y
);
1101 void scrollback(struct vc_data
*vc
, int lines
)
1104 lines
= vc
->vc_rows
/ 2;
1105 scrolldelta(-lines
);
1108 void scrollfront(struct vc_data
*vc
, int lines
)
1111 lines
= vc
->vc_rows
/ 2;
1115 static void lf(struct vc_data
*vc
)
1117 /* don't scroll if above bottom of scrolling region, or
1118 * if below scrolling region
1120 if (vc
->vc_y
+ 1 == vc
->vc_bottom
)
1121 scrup(vc
, vc
->vc_top
, vc
->vc_bottom
, 1);
1122 else if (vc
->vc_y
< vc
->vc_rows
- 1) {
1124 vc
->vc_pos
+= vc
->vc_size_row
;
1126 vc
->vc_need_wrap
= 0;
1127 notify_write(vc
, '\n');
1130 static void ri(struct vc_data
*vc
)
1132 /* don't scroll if below top of scrolling region, or
1133 * if above scrolling region
1135 if (vc
->vc_y
== vc
->vc_top
)
1136 scrdown(vc
, vc
->vc_top
, vc
->vc_bottom
, 1);
1137 else if (vc
->vc_y
> 0) {
1139 vc
->vc_pos
-= vc
->vc_size_row
;
1141 vc
->vc_need_wrap
= 0;
1144 static inline void cr(struct vc_data
*vc
)
1146 vc
->vc_pos
-= vc
->vc_x
<< 1;
1147 vc
->vc_need_wrap
= vc
->vc_x
= 0;
1148 notify_write(vc
, '\r');
1151 static inline void bs(struct vc_data
*vc
)
1156 vc
->vc_need_wrap
= 0;
1157 notify_write(vc
, '\b');
1161 static inline void del(struct vc_data
*vc
)
1166 static void csi_J(struct vc_data
*vc
, int vpar
)
1169 unsigned short * start
;
1172 case 0: /* erase from cursor to end of display */
1173 count
= (vc
->vc_scr_end
- vc
->vc_pos
) >> 1;
1174 start
= (unsigned short *)vc
->vc_pos
;
1175 if (DO_UPDATE(vc
)) {
1176 /* do in two stages */
1177 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, vc
->vc_x
, 1,
1178 vc
->vc_cols
- vc
->vc_x
);
1179 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
+ 1, 0,
1180 vc
->vc_rows
- vc
->vc_y
- 1,
1184 case 1: /* erase from start to cursor */
1185 count
= ((vc
->vc_pos
- vc
->vc_origin
) >> 1) + 1;
1186 start
= (unsigned short *)vc
->vc_origin
;
1187 if (DO_UPDATE(vc
)) {
1188 /* do in two stages */
1189 vc
->vc_sw
->con_clear(vc
, 0, 0, vc
->vc_y
,
1191 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, 0, 1,
1195 case 3: /* erase scroll-back buffer (and whole display) */
1196 scr_memsetw(vc
->vc_screenbuf
, vc
->vc_video_erase_char
,
1197 vc
->vc_screenbuf_size
>> 1);
1199 if (CON_IS_VISIBLE(vc
))
1202 case 2: /* erase whole display */
1203 count
= vc
->vc_cols
* vc
->vc_rows
;
1204 start
= (unsigned short *)vc
->vc_origin
;
1206 vc
->vc_sw
->con_clear(vc
, 0, 0,
1213 scr_memsetw(start
, vc
->vc_video_erase_char
, 2 * count
);
1214 vc
->vc_need_wrap
= 0;
1217 static void csi_K(struct vc_data
*vc
, int vpar
)
1220 unsigned short * start
;
1223 case 0: /* erase from cursor to end of line */
1224 count
= vc
->vc_cols
- vc
->vc_x
;
1225 start
= (unsigned short *)vc
->vc_pos
;
1227 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, vc
->vc_x
, 1,
1228 vc
->vc_cols
- vc
->vc_x
);
1230 case 1: /* erase from start of line to cursor */
1231 start
= (unsigned short *)(vc
->vc_pos
- (vc
->vc_x
<< 1));
1232 count
= vc
->vc_x
+ 1;
1234 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, 0, 1,
1237 case 2: /* erase whole line */
1238 start
= (unsigned short *)(vc
->vc_pos
- (vc
->vc_x
<< 1));
1239 count
= vc
->vc_cols
;
1241 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, 0, 1,
1247 scr_memsetw(start
, vc
->vc_video_erase_char
, 2 * count
);
1248 vc
->vc_need_wrap
= 0;
1251 static void csi_X(struct vc_data
*vc
, int vpar
) /* erase the following vpar positions */
1257 count
= (vpar
> vc
->vc_cols
- vc
->vc_x
) ? (vc
->vc_cols
- vc
->vc_x
) : vpar
;
1259 scr_memsetw((unsigned short *)vc
->vc_pos
, vc
->vc_video_erase_char
, 2 * count
);
1261 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, vc
->vc_x
, 1, count
);
1262 vc
->vc_need_wrap
= 0;
1265 static void default_attr(struct vc_data
*vc
)
1267 vc
->vc_intensity
= 1;
1269 vc
->vc_underline
= 0;
1272 vc
->vc_color
= vc
->vc_def_color
;
1275 /* console_lock is held */
1276 static void csi_m(struct vc_data
*vc
)
1280 for (i
= 0; i
<= vc
->vc_npar
; i
++)
1281 switch (vc
->vc_par
[i
]) {
1282 case 0: /* all attributes off */
1286 vc
->vc_intensity
= 2;
1289 vc
->vc_intensity
= 0;
1295 vc
->vc_underline
= 1;
1303 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1304 * Select primary font, don't display
1305 * control chars if defined, don't set
1308 vc
->vc_translate
= set_translate(vc
->vc_charset
== 0
1310 : vc
->vc_G1_charset
, vc
);
1311 vc
->vc_disp_ctrl
= 0;
1312 vc
->vc_toggle_meta
= 0;
1314 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1315 * Select first alternate font, lets
1316 * chars < 32 be displayed as ROM chars.
1318 vc
->vc_translate
= set_translate(IBMPC_MAP
, vc
);
1319 vc
->vc_disp_ctrl
= 1;
1320 vc
->vc_toggle_meta
= 0;
1322 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1323 * Select second alternate font, toggle
1324 * high bit before displaying as ROM char.
1326 vc
->vc_translate
= set_translate(IBMPC_MAP
, vc
);
1327 vc
->vc_disp_ctrl
= 1;
1328 vc
->vc_toggle_meta
= 1;
1332 vc
->vc_intensity
= 1;
1338 vc
->vc_underline
= 0;
1346 case 38: /* ANSI X3.64-1979 (SCO-ish?)
1347 * Enables underscore, white foreground
1348 * with white underscore (Linux - use
1349 * default foreground).
1351 vc
->vc_color
= (vc
->vc_def_color
& 0x0f) | (vc
->vc_color
& 0xf0);
1352 vc
->vc_underline
= 1;
1354 case 39: /* ANSI X3.64-1979 (SCO-ish?)
1355 * Disable underline option.
1356 * Reset colour to default? It did this
1359 vc
->vc_color
= (vc
->vc_def_color
& 0x0f) | (vc
->vc_color
& 0xf0);
1360 vc
->vc_underline
= 0;
1363 vc
->vc_color
= (vc
->vc_def_color
& 0xf0) | (vc
->vc_color
& 0x0f);
1366 if (vc
->vc_par
[i
] >= 30 && vc
->vc_par
[i
] <= 37)
1367 vc
->vc_color
= color_table
[vc
->vc_par
[i
] - 30]
1368 | (vc
->vc_color
& 0xf0);
1369 else if (vc
->vc_par
[i
] >= 40 && vc
->vc_par
[i
] <= 47)
1370 vc
->vc_color
= (color_table
[vc
->vc_par
[i
] - 40] << 4)
1371 | (vc
->vc_color
& 0x0f);
1377 static void respond_string(const char *p
, struct tty_struct
*tty
)
1380 tty_insert_flip_char(tty
, *p
, 0);
1383 con_schedule_flip(tty
);
1386 static void cursor_report(struct vc_data
*vc
, struct tty_struct
*tty
)
1390 sprintf(buf
, "\033[%d;%dR", vc
->vc_y
+ (vc
->vc_decom
? vc
->vc_top
+ 1 : 1), vc
->vc_x
+ 1);
1391 respond_string(buf
, tty
);
1394 static inline void status_report(struct tty_struct
*tty
)
1396 respond_string("\033[0n", tty
); /* Terminal ok */
1399 static inline void respond_ID(struct tty_struct
* tty
)
1401 respond_string(VT102ID
, tty
);
1404 void mouse_report(struct tty_struct
*tty
, int butt
, int mrx
, int mry
)
1408 sprintf(buf
, "\033[M%c%c%c", (char)(' ' + butt
), (char)('!' + mrx
),
1410 respond_string(buf
, tty
);
1413 /* invoked via ioctl(TIOCLINUX) and through set_selection */
1414 int mouse_reporting(void)
1416 return vc_cons
[fg_console
].d
->vc_report_mouse
;
1419 /* console_lock is held */
1420 static void set_mode(struct vc_data
*vc
, int on_off
)
1424 for (i
= 0; i
<= vc
->vc_npar
; i
++)
1426 switch(vc
->vc_par
[i
]) { /* DEC private modes set/reset */
1427 case 1: /* Cursor keys send ^[Ox/^[[x */
1429 set_kbd(vc
, decckm
);
1431 clr_kbd(vc
, decckm
);
1433 case 3: /* 80/132 mode switch unimplemented */
1434 vc
->vc_deccolm
= on_off
;
1436 vc_resize(deccolm
? 132 : 80, vc
->vc_rows
);
1437 /* this alone does not suffice; some user mode
1438 utility has to change the hardware regs */
1441 case 5: /* Inverted screen on/off */
1442 if (vc
->vc_decscnm
!= on_off
) {
1443 vc
->vc_decscnm
= on_off
;
1444 invert_screen(vc
, 0, vc
->vc_screenbuf_size
, 0);
1448 case 6: /* Origin relative/absolute */
1449 vc
->vc_decom
= on_off
;
1452 case 7: /* Autowrap on/off */
1453 vc
->vc_decawm
= on_off
;
1455 case 8: /* Autorepeat on/off */
1457 set_kbd(vc
, decarm
);
1459 clr_kbd(vc
, decarm
);
1462 vc
->vc_report_mouse
= on_off
? 1 : 0;
1464 case 25: /* Cursor on/off */
1465 vc
->vc_deccm
= on_off
;
1468 vc
->vc_report_mouse
= on_off
? 2 : 0;
1472 switch(vc
->vc_par
[i
]) { /* ANSI modes set/reset */
1473 case 3: /* Monitor (display ctrls) */
1474 vc
->vc_disp_ctrl
= on_off
;
1476 case 4: /* Insert Mode on/off */
1477 vc
->vc_decim
= on_off
;
1479 case 20: /* Lf, Enter == CrLf/Lf */
1489 /* console_lock is held */
1490 static void setterm_command(struct vc_data
*vc
)
1492 switch(vc
->vc_par
[0]) {
1493 case 1: /* set color for underline mode */
1494 if (vc
->vc_can_do_color
&&
1495 vc
->vc_par
[1] < 16) {
1496 vc
->vc_ulcolor
= color_table
[vc
->vc_par
[1]];
1497 if (vc
->vc_underline
)
1501 case 2: /* set color for half intensity mode */
1502 if (vc
->vc_can_do_color
&&
1503 vc
->vc_par
[1] < 16) {
1504 vc
->vc_halfcolor
= color_table
[vc
->vc_par
[1]];
1505 if (vc
->vc_intensity
== 0)
1509 case 8: /* store colors as defaults */
1510 vc
->vc_def_color
= vc
->vc_attr
;
1511 if (vc
->vc_hi_font_mask
== 0x100)
1512 vc
->vc_def_color
>>= 1;
1516 case 9: /* set blanking interval */
1517 blankinterval
= ((vc
->vc_par
[1] < 60) ? vc
->vc_par
[1] : 60) * 60;
1518 poke_blanked_console();
1520 case 10: /* set bell frequency in Hz */
1521 if (vc
->vc_npar
>= 1)
1522 vc
->vc_bell_pitch
= vc
->vc_par
[1];
1524 vc
->vc_bell_pitch
= DEFAULT_BELL_PITCH
;
1526 case 11: /* set bell duration in msec */
1527 if (vc
->vc_npar
>= 1)
1528 vc
->vc_bell_duration
= (vc
->vc_par
[1] < 2000) ?
1529 vc
->vc_par
[1] * HZ
/ 1000 : 0;
1531 vc
->vc_bell_duration
= DEFAULT_BELL_DURATION
;
1533 case 12: /* bring specified console to the front */
1534 if (vc
->vc_par
[1] >= 1 && vc_cons_allocated(vc
->vc_par
[1] - 1))
1535 set_console(vc
->vc_par
[1] - 1);
1537 case 13: /* unblank the screen */
1538 poke_blanked_console();
1540 case 14: /* set vesa powerdown interval */
1541 vesa_off_interval
= ((vc
->vc_par
[1] < 60) ? vc
->vc_par
[1] : 60) * 60 * HZ
;
1543 case 15: /* activate the previous console */
1544 set_console(last_console
);
1549 /* console_lock is held */
1550 static void csi_at(struct vc_data
*vc
, unsigned int nr
)
1552 if (nr
> vc
->vc_cols
- vc
->vc_x
)
1553 nr
= vc
->vc_cols
- vc
->vc_x
;
1556 insert_char(vc
, nr
);
1559 /* console_lock is held */
1560 static void csi_L(struct vc_data
*vc
, unsigned int nr
)
1562 if (nr
> vc
->vc_rows
- vc
->vc_y
)
1563 nr
= vc
->vc_rows
- vc
->vc_y
;
1566 scrdown(vc
, vc
->vc_y
, vc
->vc_bottom
, nr
);
1567 vc
->vc_need_wrap
= 0;
1570 /* console_lock is held */
1571 static void csi_P(struct vc_data
*vc
, unsigned int nr
)
1573 if (nr
> vc
->vc_cols
- vc
->vc_x
)
1574 nr
= vc
->vc_cols
- vc
->vc_x
;
1577 delete_char(vc
, nr
);
1580 /* console_lock is held */
1581 static void csi_M(struct vc_data
*vc
, unsigned int nr
)
1583 if (nr
> vc
->vc_rows
- vc
->vc_y
)
1584 nr
= vc
->vc_rows
- vc
->vc_y
;
1587 scrup(vc
, vc
->vc_y
, vc
->vc_bottom
, nr
);
1588 vc
->vc_need_wrap
= 0;
1591 /* console_lock is held (except via vc_init->reset_terminal */
1592 static void save_cur(struct vc_data
*vc
)
1594 vc
->vc_saved_x
= vc
->vc_x
;
1595 vc
->vc_saved_y
= vc
->vc_y
;
1596 vc
->vc_s_intensity
= vc
->vc_intensity
;
1597 vc
->vc_s_italic
= vc
->vc_italic
;
1598 vc
->vc_s_underline
= vc
->vc_underline
;
1599 vc
->vc_s_blink
= vc
->vc_blink
;
1600 vc
->vc_s_reverse
= vc
->vc_reverse
;
1601 vc
->vc_s_charset
= vc
->vc_charset
;
1602 vc
->vc_s_color
= vc
->vc_color
;
1603 vc
->vc_saved_G0
= vc
->vc_G0_charset
;
1604 vc
->vc_saved_G1
= vc
->vc_G1_charset
;
1607 /* console_lock is held */
1608 static void restore_cur(struct vc_data
*vc
)
1610 gotoxy(vc
, vc
->vc_saved_x
, vc
->vc_saved_y
);
1611 vc
->vc_intensity
= vc
->vc_s_intensity
;
1612 vc
->vc_italic
= vc
->vc_s_italic
;
1613 vc
->vc_underline
= vc
->vc_s_underline
;
1614 vc
->vc_blink
= vc
->vc_s_blink
;
1615 vc
->vc_reverse
= vc
->vc_s_reverse
;
1616 vc
->vc_charset
= vc
->vc_s_charset
;
1617 vc
->vc_color
= vc
->vc_s_color
;
1618 vc
->vc_G0_charset
= vc
->vc_saved_G0
;
1619 vc
->vc_G1_charset
= vc
->vc_saved_G1
;
1620 vc
->vc_translate
= set_translate(vc
->vc_charset
? vc
->vc_G1_charset
: vc
->vc_G0_charset
, vc
);
1622 vc
->vc_need_wrap
= 0;
1625 enum { ESnormal
, ESesc
, ESsquare
, ESgetpars
, ESgotpars
, ESfunckey
,
1626 EShash
, ESsetG0
, ESsetG1
, ESpercent
, ESignore
, ESnonstd
,
1629 /* console_lock is held (except via vc_init()) */
1630 static void reset_terminal(struct vc_data
*vc
, int do_clear
)
1633 vc
->vc_bottom
= vc
->vc_rows
;
1634 vc
->vc_state
= ESnormal
;
1636 vc
->vc_translate
= set_translate(LAT1_MAP
, vc
);
1637 vc
->vc_G0_charset
= LAT1_MAP
;
1638 vc
->vc_G1_charset
= GRAF_MAP
;
1640 vc
->vc_need_wrap
= 0;
1641 vc
->vc_report_mouse
= 0;
1642 vc
->vc_utf
= default_utf8
;
1643 vc
->vc_utf_count
= 0;
1645 vc
->vc_disp_ctrl
= 0;
1646 vc
->vc_toggle_meta
= 0;
1651 vc
->vc_deccm
= global_cursor_default
;
1654 vt_reset_keyboard(vc
->vc_num
);
1656 vc
->vc_cursor_type
= cur_default
;
1657 vc
->vc_complement_mask
= vc
->vc_s_complement_mask
;
1662 vc
->vc_tab_stop
[0] = 0x01010100;
1663 vc
->vc_tab_stop
[1] =
1664 vc
->vc_tab_stop
[2] =
1665 vc
->vc_tab_stop
[3] =
1666 vc
->vc_tab_stop
[4] =
1667 vc
->vc_tab_stop
[5] =
1668 vc
->vc_tab_stop
[6] =
1669 vc
->vc_tab_stop
[7] = 0x01010101;
1671 vc
->vc_bell_pitch
= DEFAULT_BELL_PITCH
;
1672 vc
->vc_bell_duration
= DEFAULT_BELL_DURATION
;
1680 /* console_lock is held */
1681 static void do_con_trol(struct tty_struct
*tty
, struct vc_data
*vc
, int c
)
1684 * Control characters can be used in the _middle_
1685 * of an escape sequence.
1691 if (vc
->vc_bell_duration
)
1692 kd_mksound(vc
->vc_bell_pitch
, vc
->vc_bell_duration
);
1698 vc
->vc_pos
-= (vc
->vc_x
<< 1);
1699 while (vc
->vc_x
< vc
->vc_cols
- 1) {
1701 if (vc
->vc_tab_stop
[vc
->vc_x
>> 5] & (1 << (vc
->vc_x
& 31)))
1704 vc
->vc_pos
+= (vc
->vc_x
<< 1);
1705 notify_write(vc
, '\t');
1707 case 10: case 11: case 12:
1709 if (!is_kbd(vc
, lnm
))
1716 vc
->vc_translate
= set_translate(vc
->vc_G1_charset
, vc
);
1717 vc
->vc_disp_ctrl
= 1;
1721 vc
->vc_translate
= set_translate(vc
->vc_G0_charset
, vc
);
1722 vc
->vc_disp_ctrl
= 0;
1725 vc
->vc_state
= ESnormal
;
1728 vc
->vc_state
= ESesc
;
1734 vc
->vc_state
= ESsquare
;
1737 switch(vc
->vc_state
) {
1739 vc
->vc_state
= ESnormal
;
1742 vc
->vc_state
= ESsquare
;
1745 vc
->vc_state
= ESnonstd
;
1748 vc
->vc_state
= ESpercent
;
1761 vc
->vc_tab_stop
[vc
->vc_x
>> 5] |= (1 << (vc
->vc_x
& 31));
1773 vc
->vc_state
= ESsetG0
;
1776 vc
->vc_state
= ESsetG1
;
1779 vc
->vc_state
= EShash
;
1782 reset_terminal(vc
, 1);
1784 case '>': /* Numeric keypad */
1785 clr_kbd(vc
, kbdapplic
);
1787 case '=': /* Appl. keypad */
1788 set_kbd(vc
, kbdapplic
);
1793 if (c
=='P') { /* palette escape sequence */
1794 for (vc
->vc_npar
= 0; vc
->vc_npar
< NPAR
; vc
->vc_npar
++)
1795 vc
->vc_par
[vc
->vc_npar
] = 0;
1797 vc
->vc_state
= ESpalette
;
1799 } else if (c
=='R') { /* reset palette */
1801 vc
->vc_state
= ESnormal
;
1803 vc
->vc_state
= ESnormal
;
1807 vc
->vc_par
[vc
->vc_npar
++] = hex_to_bin(c
);
1808 if (vc
->vc_npar
== 7) {
1809 int i
= vc
->vc_par
[0] * 3, j
= 1;
1810 vc
->vc_palette
[i
] = 16 * vc
->vc_par
[j
++];
1811 vc
->vc_palette
[i
++] += vc
->vc_par
[j
++];
1812 vc
->vc_palette
[i
] = 16 * vc
->vc_par
[j
++];
1813 vc
->vc_palette
[i
++] += vc
->vc_par
[j
++];
1814 vc
->vc_palette
[i
] = 16 * vc
->vc_par
[j
++];
1815 vc
->vc_palette
[i
] += vc
->vc_par
[j
];
1817 vc
->vc_state
= ESnormal
;
1820 vc
->vc_state
= ESnormal
;
1823 for (vc
->vc_npar
= 0; vc
->vc_npar
< NPAR
; vc
->vc_npar
++)
1824 vc
->vc_par
[vc
->vc_npar
] = 0;
1826 vc
->vc_state
= ESgetpars
;
1827 if (c
== '[') { /* Function key */
1828 vc
->vc_state
=ESfunckey
;
1831 vc
->vc_ques
= (c
== '?');
1835 if (c
== ';' && vc
->vc_npar
< NPAR
- 1) {
1838 } else if (c
>='0' && c
<='9') {
1839 vc
->vc_par
[vc
->vc_npar
] *= 10;
1840 vc
->vc_par
[vc
->vc_npar
] += c
- '0';
1843 vc
->vc_state
= ESgotpars
;
1845 vc
->vc_state
= ESnormal
;
1856 vc
->vc_cursor_type
= vc
->vc_par
[0] | (vc
->vc_par
[1] << 8) | (vc
->vc_par
[2] << 16);
1858 vc
->vc_cursor_type
= cur_default
;
1866 vc
->vc_complement_mask
= vc
->vc_par
[0] << 8 | vc
->vc_par
[1];
1868 vc
->vc_complement_mask
= vc
->vc_s_complement_mask
;
1874 if (vc
->vc_par
[0] == 5)
1876 else if (vc
->vc_par
[0] == 6)
1877 cursor_report(vc
, tty
);
1889 gotoxy(vc
, vc
->vc_par
[0], vc
->vc_y
);
1894 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
- vc
->vc_par
[0]);
1899 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
+ vc
->vc_par
[0]);
1904 gotoxy(vc
, vc
->vc_x
+ vc
->vc_par
[0], vc
->vc_y
);
1909 gotoxy(vc
, vc
->vc_x
- vc
->vc_par
[0], vc
->vc_y
);
1914 gotoxy(vc
, 0, vc
->vc_y
+ vc
->vc_par
[0]);
1919 gotoxy(vc
, 0, vc
->vc_y
- vc
->vc_par
[0]);
1924 gotoxay(vc
, vc
->vc_x
,vc
->vc_par
[0]);
1931 gotoxay(vc
, vc
->vc_par
[1], vc
->vc_par
[0]);
1934 csi_J(vc
, vc
->vc_par
[0]);
1937 csi_K(vc
, vc
->vc_par
[0]);
1940 csi_L(vc
, vc
->vc_par
[0]);
1943 csi_M(vc
, vc
->vc_par
[0]);
1946 csi_P(vc
, vc
->vc_par
[0]);
1954 vc
->vc_tab_stop
[vc
->vc_x
>> 5] &= ~(1 << (vc
->vc_x
& 31));
1955 else if (vc
->vc_par
[0] == 3) {
1956 vc
->vc_tab_stop
[0] =
1957 vc
->vc_tab_stop
[1] =
1958 vc
->vc_tab_stop
[2] =
1959 vc
->vc_tab_stop
[3] =
1960 vc
->vc_tab_stop
[4] =
1961 vc
->vc_tab_stop
[5] =
1962 vc
->vc_tab_stop
[6] =
1963 vc
->vc_tab_stop
[7] = 0;
1969 case 'q': /* DECLL - but only 3 leds */
1970 /* map 0,1,2,3 to 0,1,2,4 */
1971 if (vc
->vc_par
[0] < 4)
1972 vt_set_led_state(vc
->vc_num
,
1973 (vc
->vc_par
[0] < 3) ? vc
->vc_par
[0] : 4);
1979 vc
->vc_par
[1] = vc
->vc_rows
;
1980 /* Minimum allowed region is 2 lines */
1981 if (vc
->vc_par
[0] < vc
->vc_par
[1] &&
1982 vc
->vc_par
[1] <= vc
->vc_rows
) {
1983 vc
->vc_top
= vc
->vc_par
[0] - 1;
1984 vc
->vc_bottom
= vc
->vc_par
[1];
1995 csi_X(vc
, vc
->vc_par
[0]);
1998 csi_at(vc
, vc
->vc_par
[0]);
2000 case ']': /* setterm functions */
2001 setterm_command(vc
);
2006 vc
->vc_state
= ESnormal
;
2008 case '@': /* defined in ISO 2022 */
2011 case 'G': /* prelim official escape code */
2012 case '8': /* retained for compatibility */
2018 vc
->vc_state
= ESnormal
;
2021 vc
->vc_state
= ESnormal
;
2023 /* DEC screen alignment test. kludge :-) */
2024 vc
->vc_video_erase_char
=
2025 (vc
->vc_video_erase_char
& 0xff00) | 'E';
2027 vc
->vc_video_erase_char
=
2028 (vc
->vc_video_erase_char
& 0xff00) | ' ';
2029 do_update_region(vc
, vc
->vc_origin
, vc
->vc_screenbuf_size
/ 2);
2034 vc
->vc_G0_charset
= GRAF_MAP
;
2036 vc
->vc_G0_charset
= LAT1_MAP
;
2038 vc
->vc_G0_charset
= IBMPC_MAP
;
2040 vc
->vc_G0_charset
= USER_MAP
;
2041 if (vc
->vc_charset
== 0)
2042 vc
->vc_translate
= set_translate(vc
->vc_G0_charset
, vc
);
2043 vc
->vc_state
= ESnormal
;
2047 vc
->vc_G1_charset
= GRAF_MAP
;
2049 vc
->vc_G1_charset
= LAT1_MAP
;
2051 vc
->vc_G1_charset
= IBMPC_MAP
;
2053 vc
->vc_G1_charset
= USER_MAP
;
2054 if (vc
->vc_charset
== 1)
2055 vc
->vc_translate
= set_translate(vc
->vc_G1_charset
, vc
);
2056 vc
->vc_state
= ESnormal
;
2059 vc
->vc_state
= ESnormal
;
2063 /* is_double_width() is based on the wcwidth() implementation by
2064 * Markus Kuhn -- 2007-05-26 (Unicode 5.0)
2065 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
2072 static int bisearch(uint32_t ucs
, const struct interval
*table
, int max
)
2077 if (ucs
< table
[0].first
|| ucs
> table
[max
].last
)
2079 while (max
>= min
) {
2080 mid
= (min
+ max
) / 2;
2081 if (ucs
> table
[mid
].last
)
2083 else if (ucs
< table
[mid
].first
)
2091 static int is_double_width(uint32_t ucs
)
2093 static const struct interval double_width
[] = {
2094 { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E },
2095 { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF },
2096 { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 },
2097 { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD }
2099 return bisearch(ucs
, double_width
, ARRAY_SIZE(double_width
) - 1);
2102 /* acquires console_lock */
2103 static int do_con_write(struct tty_struct
*tty
, const unsigned char *buf
, int count
)
2105 #ifdef VT_BUF_VRAM_ONLY
2106 #define FLUSH do { } while(0);
2108 #define FLUSH if (draw_x >= 0) { \
2109 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
2114 int c
, tc
, ok
, n
= 0, draw_x
= -1;
2115 unsigned int currcons
;
2116 unsigned long draw_from
= 0, draw_to
= 0;
2118 unsigned char vc_attr
;
2119 struct vt_notifier_param param
;
2123 u16 himask
, charmask
;
2131 vc
= tty
->driver_data
;
2133 printk(KERN_ERR
"vt: argh, driver_data is NULL !\n");
2138 currcons
= vc
->vc_num
;
2139 if (!vc_cons_allocated(currcons
)) {
2140 /* could this happen? */
2141 pr_warn_once("con_write: tty %d not allocated\n", currcons
+1);
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();
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_lock.
2373 static void console_callback(struct work_struct
*ignored
)
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
);
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 * vt_kmsg_redirect() - Sets/gets the kernel message console
2438 * @new: The new virtual terminal number or -1 if the console should stay
2441 * By default, the kernel messages are always printed on the current virtual
2442 * console. However, the user may modify that default with the
2443 * TIOCL_SETKMSGREDIRECT ioctl call.
2445 * This function sets the kernel message console to be @new. It returns the old
2446 * virtual console number. The virtual terminal number 0 (both as parameter and
2447 * return value) means no redirection (i.e. always printed on the currently
2450 * The parameter -1 means that only the current console is returned, but the
2451 * value is not modified. You may use the macro vt_get_kmsg_redirect() in that
2452 * case to make the code more understandable.
2454 * When the kernel is compiled without CONFIG_VT_CONSOLE, this function ignores
2455 * the parameter and always returns 0.
2457 int vt_kmsg_redirect(int new)
2459 static int kmsg_con
;
2462 return xchg(&kmsg_con
, new);
2468 * Console on virtual terminal
2470 * The console must be locked when we get here.
2473 static void vt_console_print(struct console
*co
, const char *b
, unsigned count
)
2475 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
2477 static DEFINE_SPINLOCK(printing_lock
);
2478 const ushort
*start
;
2483 /* console busy or not yet initialized */
2486 if (!spin_trylock(&printing_lock
))
2489 kmsg_console
= vt_get_kmsg_redirect();
2490 if (kmsg_console
&& vc_cons_allocated(kmsg_console
- 1))
2491 vc
= vc_cons
[kmsg_console
- 1].d
;
2493 /* read `x' only after setting currcons properly (otherwise
2494 the `x' macro will read the x of the foreground console). */
2497 if (!vc_cons_allocated(fg_console
)) {
2499 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2503 if (vc
->vc_mode
!= KD_TEXT
&& !vt_force_oops_output(vc
))
2506 /* undraw cursor first */
2510 start
= (ushort
*)vc
->vc_pos
;
2512 /* Contrived structure to try to emulate original need_wrap behaviour
2513 * Problems caused when we have need_wrap set on '\n' character */
2516 if (c
== 10 || c
== 13 || c
== 8 || vc
->vc_need_wrap
) {
2518 if (CON_IS_VISIBLE(vc
))
2519 vc
->vc_sw
->con_putcs(vc
, start
, cnt
, vc
->vc_y
, vc
->vc_x
);
2521 if (vc
->vc_need_wrap
)
2525 if (c
== 8) { /* backspace */
2527 start
= (ushort
*)vc
->vc_pos
;
2534 start
= (ushort
*)vc
->vc_pos
;
2536 if (c
== 10 || c
== 13)
2539 scr_writew((vc
->vc_attr
<< 8) + c
, (unsigned short *)vc
->vc_pos
);
2540 notify_write(vc
, c
);
2542 if (myx
== vc
->vc_cols
- 1) {
2543 vc
->vc_need_wrap
= 1;
2550 if (CON_IS_VISIBLE(vc
))
2551 vc
->vc_sw
->con_putcs(vc
, start
, cnt
, vc
->vc_y
, vc
->vc_x
);
2553 if (vc
->vc_x
== vc
->vc_cols
) {
2555 vc
->vc_need_wrap
= 1;
2562 spin_unlock(&printing_lock
);
2565 static struct tty_driver
*vt_console_device(struct console
*c
, int *index
)
2567 *index
= c
->index
? c
->index
-1 : fg_console
;
2568 return console_driver
;
2571 static struct console vt_console_driver
= {
2573 .write
= vt_console_print
,
2574 .device
= vt_console_device
,
2575 .unblank
= unblank_screen
,
2576 .flags
= CON_PRINTBUFFER
,
2582 * Handling of Linux-specific VC ioctls
2586 * Generally a bit racy with respect to console_lock();.
2588 * There are some functions which don't need it.
2590 * There are some functions which can sleep for arbitrary periods
2591 * (paste_selection) but we don't need the lock there anyway.
2593 * set_selection has locking, and definitely needs it
2596 int tioclinux(struct tty_struct
*tty
, unsigned long arg
)
2599 char __user
*p
= (char __user
*)arg
;
2603 if (current
->signal
->tty
!= tty
&& !capable(CAP_SYS_ADMIN
))
2605 if (get_user(type
, p
))
2613 ret
= set_selection((struct tiocl_selection __user
*)(p
+1), tty
);
2616 case TIOCL_PASTESEL
:
2617 ret
= paste_selection(tty
);
2619 case TIOCL_UNBLANKSCREEN
:
2624 case TIOCL_SELLOADLUT
:
2626 ret
= sel_loadlut(p
);
2629 case TIOCL_GETSHIFTSTATE
:
2632 * Make it possible to react to Shift+Mousebutton.
2633 * Note that 'shift_state' is an undocumented
2634 * kernel-internal variable; programs not closely
2635 * related to the kernel should not use this.
2637 data
= vt_get_shift_state();
2638 ret
= __put_user(data
, p
);
2640 case TIOCL_GETMOUSEREPORTING
:
2641 console_lock(); /* May be overkill */
2642 data
= mouse_reporting();
2644 ret
= __put_user(data
, p
);
2646 case TIOCL_SETVESABLANK
:
2648 ret
= set_vesa_blanking(p
);
2651 case TIOCL_GETKMSGREDIRECT
:
2652 data
= vt_get_kmsg_redirect();
2653 ret
= __put_user(data
, p
);
2655 case TIOCL_SETKMSGREDIRECT
:
2656 if (!capable(CAP_SYS_ADMIN
)) {
2659 if (get_user(data
, p
+1))
2662 vt_kmsg_redirect(data
);
2665 case TIOCL_GETFGCONSOLE
:
2666 /* No locking needed as this is a transiently
2667 correct return anyway if the caller hasn't
2668 disabled switching */
2671 case TIOCL_SCROLLCONSOLE
:
2672 if (get_user(lines
, (s32 __user
*)(p
+4))) {
2675 /* Need the console lock here. Note that lots
2676 of other calls need fixing before the lock
2677 is actually useful ! */
2679 scrollfront(vc_cons
[fg_console
].d
, lines
);
2684 case TIOCL_BLANKSCREEN
: /* until explicitly unblanked, not only poked */
2690 case TIOCL_BLANKEDSCREEN
:
2691 ret
= console_blanked
;
2701 * /dev/ttyN handling
2704 static int con_write(struct tty_struct
*tty
, const unsigned char *buf
, int count
)
2708 retval
= do_con_write(tty
, buf
, count
);
2709 con_flush_chars(tty
);
2714 static int con_put_char(struct tty_struct
*tty
, unsigned char ch
)
2717 return 0; /* n_r3964 calls put_char() from interrupt context */
2718 return do_con_write(tty
, &ch
, 1);
2721 static int con_write_room(struct tty_struct
*tty
)
2725 return 32768; /* No limit, really; we're not buffering */
2728 static int con_chars_in_buffer(struct tty_struct
*tty
)
2730 return 0; /* we're not buffering */
2734 * con_throttle and con_unthrottle are only used for
2735 * paste_selection(), which has to stuff in a large number of
2738 static void con_throttle(struct tty_struct
*tty
)
2742 static void con_unthrottle(struct tty_struct
*tty
)
2744 struct vc_data
*vc
= tty
->driver_data
;
2746 wake_up_interruptible(&vc
->paste_wait
);
2750 * Turn the Scroll-Lock LED on when the tty is stopped
2752 static void con_stop(struct tty_struct
*tty
)
2757 console_num
= tty
->index
;
2758 if (!vc_cons_allocated(console_num
))
2760 vt_kbd_con_stop(console_num
);
2764 * Turn the Scroll-Lock LED off when the console is started
2766 static void con_start(struct tty_struct
*tty
)
2771 console_num
= tty
->index
;
2772 if (!vc_cons_allocated(console_num
))
2774 vt_kbd_con_start(console_num
);
2777 static void con_flush_chars(struct tty_struct
*tty
)
2781 if (in_interrupt()) /* from flush_to_ldisc */
2784 /* if we race with con_close(), vt may be null */
2786 vc
= tty
->driver_data
;
2793 * Allocate the console screen memory.
2795 static int con_open(struct tty_struct
*tty
, struct file
*filp
)
2797 unsigned int currcons
= tty
->index
;
2801 if (tty
->driver_data
== NULL
) {
2802 ret
= vc_allocate(currcons
);
2804 struct vc_data
*vc
= vc_cons
[currcons
].d
;
2806 /* Still being freed */
2809 return -ERESTARTSYS
;
2811 tty
->driver_data
= vc
;
2814 if (!tty
->winsize
.ws_row
&& !tty
->winsize
.ws_col
) {
2815 tty
->winsize
.ws_row
= vc_cons
[currcons
].d
->vc_rows
;
2816 tty
->winsize
.ws_col
= vc_cons
[currcons
].d
->vc_cols
;
2819 tty
->termios
->c_iflag
|= IUTF8
;
2821 tty
->termios
->c_iflag
&= ~IUTF8
;
2830 static void con_close(struct tty_struct
*tty
, struct file
*filp
)
2832 /* Nothing to do - we defer to shutdown */
2835 static void con_shutdown(struct tty_struct
*tty
)
2837 struct vc_data
*vc
= tty
->driver_data
;
2840 vc
->port
.tty
= NULL
;
2845 static int default_italic_color
= 2; // green (ASCII)
2846 static int default_underline_color
= 3; // cyan (ASCII)
2847 module_param_named(italic
, default_italic_color
, int, S_IRUGO
| S_IWUSR
);
2848 module_param_named(underline
, default_underline_color
, int, S_IRUGO
| S_IWUSR
);
2850 static void vc_init(struct vc_data
*vc
, unsigned int rows
,
2851 unsigned int cols
, int do_clear
)
2857 vc
->vc_size_row
= cols
<< 1;
2858 vc
->vc_screenbuf_size
= vc
->vc_rows
* vc
->vc_size_row
;
2861 vc
->vc_pos
= vc
->vc_origin
;
2863 for (j
=k
=0; j
<16; j
++) {
2864 vc
->vc_palette
[k
++] = default_red
[j
] ;
2865 vc
->vc_palette
[k
++] = default_grn
[j
] ;
2866 vc
->vc_palette
[k
++] = default_blu
[j
] ;
2868 vc
->vc_def_color
= 0x07; /* white */
2869 vc
->vc_ulcolor
= default_underline_color
;
2870 vc
->vc_itcolor
= default_italic_color
;
2871 vc
->vc_halfcolor
= 0x08; /* grey */
2872 init_waitqueue_head(&vc
->paste_wait
);
2873 reset_terminal(vc
, do_clear
);
2877 * This routine initializes console interrupts, and does nothing
2878 * else. If you want the screen to clear, call tty_write with
2879 * the appropriate escape-sequence.
2882 static int __init
con_init(void)
2884 const char *display_desc
= NULL
;
2886 unsigned int currcons
= 0, i
;
2891 display_desc
= conswitchp
->con_startup();
2892 if (!display_desc
) {
2898 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
2899 struct con_driver
*con_driver
= ®istered_con_driver
[i
];
2901 if (con_driver
->con
== NULL
) {
2902 con_driver
->con
= conswitchp
;
2903 con_driver
->desc
= display_desc
;
2904 con_driver
->flag
= CON_DRIVER_FLAG_INIT
;
2905 con_driver
->first
= 0;
2906 con_driver
->last
= MAX_NR_CONSOLES
- 1;
2911 for (i
= 0; i
< MAX_NR_CONSOLES
; i
++)
2912 con_driver_map
[i
] = conswitchp
;
2914 if (blankinterval
) {
2915 blank_state
= blank_normal_wait
;
2916 mod_timer(&console_timer
, jiffies
+ (blankinterval
* HZ
));
2919 for (currcons
= 0; currcons
< MIN_NR_CONSOLES
; currcons
++) {
2920 vc_cons
[currcons
].d
= vc
= kzalloc(sizeof(struct vc_data
), GFP_NOWAIT
);
2921 INIT_WORK(&vc_cons
[currcons
].SAK_work
, vc_SAK
);
2922 tty_port_init(&vc
->port
);
2923 visual_init(vc
, currcons
, 1);
2924 vc
->vc_screenbuf
= kzalloc(vc
->vc_screenbuf_size
, GFP_NOWAIT
);
2925 vc_init(vc
, vc
->vc_rows
, vc
->vc_cols
,
2926 currcons
|| !vc
->vc_sw
->con_save_screen
);
2928 currcons
= fg_console
= 0;
2929 master_display_fg
= vc
= vc_cons
[currcons
].d
;
2932 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
);
2935 pr_info("Console: %s %s %dx%d",
2936 vc
->vc_can_do_color
? "colour" : "mono",
2937 display_desc
, vc
->vc_cols
, vc
->vc_rows
);
2943 #ifdef CONFIG_VT_CONSOLE
2944 register_console(&vt_console_driver
);
2948 console_initcall(con_init
);
2950 static const struct tty_operations con_ops
= {
2954 .write_room
= con_write_room
,
2955 .put_char
= con_put_char
,
2956 .flush_chars
= con_flush_chars
,
2957 .chars_in_buffer
= con_chars_in_buffer
,
2959 #ifdef CONFIG_COMPAT
2960 .compat_ioctl
= vt_compat_ioctl
,
2964 .throttle
= con_throttle
,
2965 .unthrottle
= con_unthrottle
,
2966 .resize
= vt_resize
,
2967 .shutdown
= con_shutdown
2970 static struct cdev vc0_cdev
;
2972 static ssize_t
show_tty_active(struct device
*dev
,
2973 struct device_attribute
*attr
, char *buf
)
2975 return sprintf(buf
, "tty%d\n", fg_console
+ 1);
2977 static DEVICE_ATTR(active
, S_IRUGO
, show_tty_active
, NULL
);
2979 int __init
vty_init(const struct file_operations
*console_fops
)
2981 cdev_init(&vc0_cdev
, console_fops
);
2982 if (cdev_add(&vc0_cdev
, MKDEV(TTY_MAJOR
, 0), 1) ||
2983 register_chrdev_region(MKDEV(TTY_MAJOR
, 0), 1, "/dev/vc/0") < 0)
2984 panic("Couldn't register /dev/tty0 driver\n");
2985 tty0dev
= device_create(tty_class
, NULL
, MKDEV(TTY_MAJOR
, 0), NULL
, "tty0");
2986 if (IS_ERR(tty0dev
))
2989 WARN_ON(device_create_file(tty0dev
, &dev_attr_active
) < 0);
2993 console_driver
= alloc_tty_driver(MAX_NR_CONSOLES
);
2994 if (!console_driver
)
2995 panic("Couldn't allocate console driver\n");
2997 console_driver
->name
= "tty";
2998 console_driver
->name_base
= 1;
2999 console_driver
->major
= TTY_MAJOR
;
3000 console_driver
->minor_start
= 1;
3001 console_driver
->type
= TTY_DRIVER_TYPE_CONSOLE
;
3002 console_driver
->init_termios
= tty_std_termios
;
3004 console_driver
->init_termios
.c_iflag
|= IUTF8
;
3005 console_driver
->flags
= TTY_DRIVER_REAL_RAW
| TTY_DRIVER_RESET_TERMIOS
;
3006 tty_set_operations(console_driver
, &con_ops
);
3007 if (tty_register_driver(console_driver
))
3008 panic("Couldn't register console driver\n");
3011 #ifdef CONFIG_MDA_CONSOLE
3017 #ifndef VT_SINGLE_DRIVER
3019 static struct class *vtconsole_class
;
3021 static int bind_con_driver(const struct consw
*csw
, int first
, int last
,
3024 struct module
*owner
= csw
->owner
;
3025 const char *desc
= NULL
;
3026 struct con_driver
*con_driver
;
3027 int i
, j
= -1, k
= -1, retval
= -ENODEV
;
3029 if (!try_module_get(owner
))
3034 /* check if driver is registered */
3035 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3036 con_driver
= ®istered_con_driver
[i
];
3038 if (con_driver
->con
== csw
) {
3039 desc
= con_driver
->desc
;
3048 if (!(con_driver
->flag
& CON_DRIVER_FLAG_INIT
)) {
3050 con_driver
->flag
|= CON_DRIVER_FLAG_INIT
;
3055 module_put(conswitchp
->owner
);
3057 __module_get(owner
);
3061 first
= max(first
, con_driver
->first
);
3062 last
= min(last
, con_driver
->last
);
3064 for (i
= first
; i
<= last
; i
++) {
3066 struct vc_data
*vc
= vc_cons
[i
].d
;
3068 if (con_driver_map
[i
])
3069 module_put(con_driver_map
[i
]->owner
);
3070 __module_get(owner
);
3071 con_driver_map
[i
] = csw
;
3073 if (!vc
|| !vc
->vc_sw
)
3078 if (CON_IS_VISIBLE(vc
)) {
3083 old_was_color
= vc
->vc_can_do_color
;
3084 vc
->vc_sw
->con_deinit(vc
);
3085 vc
->vc_origin
= (unsigned long)vc
->vc_screenbuf
;
3086 visual_init(vc
, i
, 0);
3090 /* If the console changed between mono <-> color, then
3091 * the attributes in the screenbuf will be wrong. The
3092 * following resets all attributes to something sane.
3094 if (old_was_color
!= vc
->vc_can_do_color
)
3095 clear_buffer_attributes(vc
);
3098 pr_info("Console: switching ");
3100 printk("consoles %d-%d ", first
+1, last
+1);
3102 struct vc_data
*vc
= vc_cons
[j
].d
;
3104 printk("to %s %s %dx%d\n",
3105 vc
->vc_can_do_color
? "colour" : "mono",
3106 desc
, vc
->vc_cols
, vc
->vc_rows
);
3113 printk("to %s\n", desc
);
3122 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
3123 static int con_is_graphics(const struct consw
*csw
, int first
, int last
)
3127 for (i
= first
; i
<= last
; i
++) {
3128 struct vc_data
*vc
= vc_cons
[i
].d
;
3130 if (vc
&& vc
->vc_mode
== KD_GRAPHICS
) {
3140 * unbind_con_driver - unbind a console driver
3141 * @csw: pointer to console driver to unregister
3142 * @first: first in range of consoles that @csw should be unbound from
3143 * @last: last in range of consoles that @csw should be unbound from
3144 * @deflt: should next bound console driver be default after @csw is unbound?
3146 * To unbind a driver from all possible consoles, pass 0 as @first and
3147 * %MAX_NR_CONSOLES as @last.
3149 * @deflt controls whether the console that ends up replacing @csw should be
3150 * the default console.
3153 * -ENODEV if @csw isn't a registered console driver or can't be unregistered
3156 int unbind_con_driver(const struct consw
*csw
, int first
, int last
, int deflt
)
3158 struct module
*owner
= csw
->owner
;
3159 const struct consw
*defcsw
= NULL
;
3160 struct con_driver
*con_driver
= NULL
, *con_back
= NULL
;
3161 int i
, retval
= -ENODEV
;
3163 if (!try_module_get(owner
))
3168 /* check if driver is registered and if it is unbindable */
3169 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3170 con_driver
= ®istered_con_driver
[i
];
3172 if (con_driver
->con
== csw
&&
3173 con_driver
->flag
& CON_DRIVER_FLAG_MODULE
) {
3186 /* check if backup driver exists */
3187 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3188 con_back
= ®istered_con_driver
[i
];
3190 if (con_back
->con
&&
3191 !(con_back
->flag
& CON_DRIVER_FLAG_MODULE
)) {
3192 defcsw
= con_back
->con
;
3203 if (!con_is_bound(csw
)) {
3208 first
= max(first
, con_driver
->first
);
3209 last
= min(last
, con_driver
->last
);
3211 for (i
= first
; i
<= last
; i
++) {
3212 if (con_driver_map
[i
] == csw
) {
3213 module_put(csw
->owner
);
3214 con_driver_map
[i
] = NULL
;
3218 if (!con_is_bound(defcsw
)) {
3219 const struct consw
*defconsw
= conswitchp
;
3221 defcsw
->con_startup();
3222 con_back
->flag
|= CON_DRIVER_FLAG_INIT
;
3224 * vgacon may change the default driver to point
3225 * to dummycon, we restore it here...
3227 conswitchp
= defconsw
;
3230 if (!con_is_bound(csw
))
3231 con_driver
->flag
&= ~CON_DRIVER_FLAG_INIT
;
3234 /* ignore return value, binding should not fail */
3235 bind_con_driver(defcsw
, first
, last
, deflt
);
3241 EXPORT_SYMBOL(unbind_con_driver
);
3243 static int vt_bind(struct con_driver
*con
)
3245 const struct consw
*defcsw
= NULL
, *csw
= NULL
;
3246 int i
, more
= 1, first
= -1, last
= -1, deflt
= 0;
3248 if (!con
->con
|| !(con
->flag
& CON_DRIVER_FLAG_MODULE
) ||
3249 con_is_graphics(con
->con
, con
->first
, con
->last
))
3254 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3255 struct con_driver
*con
= ®istered_con_driver
[i
];
3257 if (con
->con
&& !(con
->flag
& CON_DRIVER_FLAG_MODULE
)) {
3269 for (i
= con
->first
; i
<= con
->last
; i
++) {
3270 if (con_driver_map
[i
] == defcsw
) {
3275 } else if (first
!= -1)
3279 if (first
== 0 && last
== MAX_NR_CONSOLES
-1)
3283 bind_con_driver(csw
, first
, last
, deflt
);
3294 static int vt_unbind(struct con_driver
*con
)
3296 const struct consw
*csw
= NULL
;
3297 int i
, more
= 1, first
= -1, last
= -1, deflt
= 0;
3299 if (!con
->con
|| !(con
->flag
& CON_DRIVER_FLAG_MODULE
) ||
3300 con_is_graphics(con
->con
, con
->first
, con
->last
))
3308 for (i
= con
->first
; i
<= con
->last
; i
++) {
3309 if (con_driver_map
[i
] == csw
) {
3314 } else if (first
!= -1)
3318 if (first
== 0 && last
== MAX_NR_CONSOLES
-1)
3322 unbind_con_driver(csw
, first
, last
, deflt
);
3333 static inline int vt_bind(struct con_driver
*con
)
3337 static inline int vt_unbind(struct con_driver
*con
)
3341 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3343 static ssize_t
store_bind(struct device
*dev
, struct device_attribute
*attr
,
3344 const char *buf
, size_t count
)
3346 struct con_driver
*con
= dev_get_drvdata(dev
);
3347 int bind
= simple_strtoul(buf
, NULL
, 0);
3357 static ssize_t
show_bind(struct device
*dev
, struct device_attribute
*attr
,
3360 struct con_driver
*con
= dev_get_drvdata(dev
);
3361 int bind
= con_is_bound(con
->con
);
3363 return snprintf(buf
, PAGE_SIZE
, "%i\n", bind
);
3366 static ssize_t
show_name(struct device
*dev
, struct device_attribute
*attr
,
3369 struct con_driver
*con
= dev_get_drvdata(dev
);
3371 return snprintf(buf
, PAGE_SIZE
, "%s %s\n",
3372 (con
->flag
& CON_DRIVER_FLAG_MODULE
) ? "(M)" : "(S)",
3377 static struct device_attribute device_attrs
[] = {
3378 __ATTR(bind
, S_IRUGO
|S_IWUSR
, show_bind
, store_bind
),
3379 __ATTR(name
, S_IRUGO
, show_name
, NULL
),
3382 static int vtconsole_init_device(struct con_driver
*con
)
3387 con
->flag
|= CON_DRIVER_FLAG_ATTR
;
3388 dev_set_drvdata(con
->dev
, con
);
3389 for (i
= 0; i
< ARRAY_SIZE(device_attrs
); i
++) {
3390 error
= device_create_file(con
->dev
, &device_attrs
[i
]);
3397 device_remove_file(con
->dev
, &device_attrs
[i
]);
3398 con
->flag
&= ~CON_DRIVER_FLAG_ATTR
;
3404 static void vtconsole_deinit_device(struct con_driver
*con
)
3408 if (con
->flag
& CON_DRIVER_FLAG_ATTR
) {
3409 for (i
= 0; i
< ARRAY_SIZE(device_attrs
); i
++)
3410 device_remove_file(con
->dev
, &device_attrs
[i
]);
3411 con
->flag
&= ~CON_DRIVER_FLAG_ATTR
;
3416 * con_is_bound - checks if driver is bound to the console
3417 * @csw: console driver
3419 * RETURNS: zero if unbound, nonzero if bound
3421 * Drivers can call this and if zero, they should release
3422 * all resources allocated on con_startup()
3424 int con_is_bound(const struct consw
*csw
)
3428 for (i
= 0; i
< MAX_NR_CONSOLES
; i
++) {
3429 if (con_driver_map
[i
] == csw
) {
3437 EXPORT_SYMBOL(con_is_bound
);
3440 * con_debug_enter - prepare the console for the kernel debugger
3441 * @sw: console driver
3443 * Called when the console is taken over by the kernel debugger, this
3444 * function needs to save the current console state, then put the console
3445 * into a state suitable for the kernel debugger.
3448 * Zero on success, nonzero if a failure occurred when trying to prepare
3449 * the console for the debugger.
3451 int con_debug_enter(struct vc_data
*vc
)
3455 saved_fg_console
= fg_console
;
3456 saved_last_console
= last_console
;
3457 saved_want_console
= want_console
;
3458 saved_vc_mode
= vc
->vc_mode
;
3459 saved_console_blanked
= console_blanked
;
3460 vc
->vc_mode
= KD_TEXT
;
3461 console_blanked
= 0;
3462 if (vc
->vc_sw
->con_debug_enter
)
3463 ret
= vc
->vc_sw
->con_debug_enter(vc
);
3464 #ifdef CONFIG_KGDB_KDB
3465 /* Set the initial LINES variable if it is not already set */
3466 if (vc
->vc_rows
< 999) {
3469 const char *setargs
[3] = {
3474 if (kdbgetintenv(setargs
[0], &linecount
)) {
3475 snprintf(lns
, 4, "%i", vc
->vc_rows
);
3476 kdb_set(2, setargs
);
3479 #endif /* CONFIG_KGDB_KDB */
3482 EXPORT_SYMBOL_GPL(con_debug_enter
);
3485 * con_debug_leave - restore console state
3486 * @sw: console driver
3488 * Restore the console state to what it was before the kernel debugger
3492 * Zero on success, nonzero if a failure occurred when trying to restore
3495 int con_debug_leave(void)
3500 fg_console
= saved_fg_console
;
3501 last_console
= saved_last_console
;
3502 want_console
= saved_want_console
;
3503 console_blanked
= saved_console_blanked
;
3504 vc_cons
[fg_console
].d
->vc_mode
= saved_vc_mode
;
3506 vc
= vc_cons
[fg_console
].d
;
3507 if (vc
->vc_sw
->con_debug_leave
)
3508 ret
= vc
->vc_sw
->con_debug_leave(vc
);
3511 EXPORT_SYMBOL_GPL(con_debug_leave
);
3514 * register_con_driver - register console driver to console layer
3515 * @csw: console driver
3516 * @first: the first console to take over, minimum value is 0
3517 * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1
3519 * DESCRIPTION: This function registers a console driver which can later
3520 * bind to a range of consoles specified by @first and @last. It will
3521 * also initialize the console driver by calling con_startup().
3523 int register_con_driver(const struct consw
*csw
, int first
, int last
)
3525 struct module
*owner
= csw
->owner
;
3526 struct con_driver
*con_driver
;
3530 if (!try_module_get(owner
))
3535 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3536 con_driver
= ®istered_con_driver
[i
];
3538 /* already registered */
3539 if (con_driver
->con
== csw
)
3546 desc
= csw
->con_startup();
3553 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3554 con_driver
= ®istered_con_driver
[i
];
3556 if (con_driver
->con
== NULL
) {
3557 con_driver
->con
= csw
;
3558 con_driver
->desc
= desc
;
3559 con_driver
->node
= i
;
3560 con_driver
->flag
= CON_DRIVER_FLAG_MODULE
|
3561 CON_DRIVER_FLAG_INIT
;
3562 con_driver
->first
= first
;
3563 con_driver
->last
= last
;
3572 con_driver
->dev
= device_create(vtconsole_class
, NULL
,
3573 MKDEV(0, con_driver
->node
),
3577 if (IS_ERR(con_driver
->dev
)) {
3578 printk(KERN_WARNING
"Unable to create device for %s; "
3579 "errno = %ld\n", con_driver
->desc
,
3580 PTR_ERR(con_driver
->dev
));
3581 con_driver
->dev
= NULL
;
3583 vtconsole_init_device(con_driver
);
3591 EXPORT_SYMBOL(register_con_driver
);
3594 * unregister_con_driver - unregister console driver from console layer
3595 * @csw: console driver
3597 * DESCRIPTION: All drivers that registers to the console layer must
3598 * call this function upon exit, or if the console driver is in a state
3599 * where it won't be able to handle console services, such as the
3600 * framebuffer console without loaded framebuffer drivers.
3602 * The driver must unbind first prior to unregistration.
3604 int unregister_con_driver(const struct consw
*csw
)
3606 int i
, retval
= -ENODEV
;
3610 /* cannot unregister a bound driver */
3611 if (con_is_bound(csw
))
3614 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3615 struct con_driver
*con_driver
= ®istered_con_driver
[i
];
3617 if (con_driver
->con
== csw
&&
3618 con_driver
->flag
& CON_DRIVER_FLAG_MODULE
) {
3619 vtconsole_deinit_device(con_driver
);
3620 device_destroy(vtconsole_class
,
3621 MKDEV(0, con_driver
->node
));
3622 con_driver
->con
= NULL
;
3623 con_driver
->desc
= NULL
;
3624 con_driver
->dev
= NULL
;
3625 con_driver
->node
= 0;
3626 con_driver
->flag
= 0;
3627 con_driver
->first
= 0;
3628 con_driver
->last
= 0;
3637 EXPORT_SYMBOL(unregister_con_driver
);
3640 * If we support more console drivers, this function is used
3641 * when a driver wants to take over some existing consoles
3642 * and become default driver for newly opened ones.
3644 * take_over_console is basically a register followed by unbind
3646 int take_over_console(const struct consw
*csw
, int first
, int last
, int deflt
)
3650 err
= register_con_driver(csw
, first
, last
);
3651 /* if we get an busy error we still want to bind the console driver
3652 * and return success, as we may have unbound the console driver
3653 Â * but not unregistered it.
3658 bind_con_driver(csw
, first
, last
, deflt
);
3664 * give_up_console is a wrapper to unregister_con_driver. It will only
3665 * work if driver is fully unbound.
3667 void give_up_console(const struct consw
*csw
)
3669 unregister_con_driver(csw
);
3672 static int __init
vtconsole_class_init(void)
3676 vtconsole_class
= class_create(THIS_MODULE
, "vtconsole");
3677 if (IS_ERR(vtconsole_class
)) {
3678 printk(KERN_WARNING
"Unable to create vt console class; "
3679 "errno = %ld\n", PTR_ERR(vtconsole_class
));
3680 vtconsole_class
= NULL
;
3683 /* Add system drivers to sysfs */
3684 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3685 struct con_driver
*con
= ®istered_con_driver
[i
];
3687 if (con
->con
&& !con
->dev
) {
3688 con
->dev
= device_create(vtconsole_class
, NULL
,
3689 MKDEV(0, con
->node
),
3693 if (IS_ERR(con
->dev
)) {
3694 printk(KERN_WARNING
"Unable to create "
3695 "device for %s; errno = %ld\n",
3696 con
->desc
, PTR_ERR(con
->dev
));
3699 vtconsole_init_device(con
);
3706 postcore_initcall(vtconsole_class_init
);
3714 static int set_vesa_blanking(char __user
*p
)
3718 if (get_user(mode
, p
+ 1))
3721 vesa_blank_mode
= (mode
< 4) ? mode
: 0;
3725 void do_blank_screen(int entering_gfx
)
3727 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
3730 WARN_CONSOLE_UNLOCKED();
3732 if (console_blanked
) {
3733 if (blank_state
== blank_vesa_wait
) {
3734 blank_state
= blank_off
;
3735 vc
->vc_sw
->con_blank(vc
, vesa_blank_mode
+ 1, 0);
3740 /* entering graphics mode? */
3744 vc
->vc_sw
->con_blank(vc
, -1, 1);
3745 console_blanked
= fg_console
+ 1;
3746 blank_state
= blank_off
;
3751 if (blank_state
!= blank_normal_wait
)
3753 blank_state
= blank_off
;
3755 /* don't blank graphics */
3756 if (vc
->vc_mode
!= KD_TEXT
) {
3757 console_blanked
= fg_console
+ 1;
3762 del_timer_sync(&console_timer
);
3763 blank_timer_expired
= 0;
3766 /* In case we need to reset origin, blanking hook returns 1 */
3767 i
= vc
->vc_sw
->con_blank(vc
, vesa_off_interval
? 1 : (vesa_blank_mode
+ 1), 0);
3768 console_blanked
= fg_console
+ 1;
3772 if (console_blank_hook
&& console_blank_hook(1))
3775 if (vesa_off_interval
&& vesa_blank_mode
) {
3776 blank_state
= blank_vesa_wait
;
3777 mod_timer(&console_timer
, jiffies
+ vesa_off_interval
);
3779 vt_event_post(VT_EVENT_BLANK
, vc
->vc_num
, vc
->vc_num
);
3781 EXPORT_SYMBOL(do_blank_screen
);
3784 * Called by timer as well as from vt_console_driver
3786 void do_unblank_screen(int leaving_gfx
)
3790 /* This should now always be called from a "sane" (read: can schedule)
3791 * context for the sake of the low level drivers, except in the special
3792 * case of oops_in_progress
3794 if (!oops_in_progress
)
3797 WARN_CONSOLE_UNLOCKED();
3800 if (!console_blanked
)
3802 if (!vc_cons_allocated(fg_console
)) {
3804 pr_warning("unblank_screen: tty %d not allocated ??\n",
3808 vc
= vc_cons
[fg_console
].d
;
3809 /* Try to unblank in oops case too */
3810 if (vc
->vc_mode
!= KD_TEXT
&& !vt_force_oops_output(vc
))
3811 return; /* but leave console_blanked != 0 */
3813 if (blankinterval
) {
3814 mod_timer(&console_timer
, jiffies
+ (blankinterval
* HZ
));
3815 blank_state
= blank_normal_wait
;
3818 console_blanked
= 0;
3819 if (vc
->vc_sw
->con_blank(vc
, 0, leaving_gfx
) || vt_force_oops_output(vc
))
3820 /* Low-level driver cannot restore -> do it ourselves */
3822 if (console_blank_hook
)
3823 console_blank_hook(0);
3826 vt_event_post(VT_EVENT_UNBLANK
, vc
->vc_num
, vc
->vc_num
);
3828 EXPORT_SYMBOL(do_unblank_screen
);
3831 * This is called by the outside world to cause a forced unblank, mostly for
3832 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
3833 * call it with 1 as an argument and so force a mode restore... that may kill
3834 * X or at least garbage the screen but would also make the Oops visible...
3836 void unblank_screen(void)
3838 do_unblank_screen(0);
3842 * We defer the timer blanking to work queue so it can take the console mutex
3843 * (console operations can still happen at irq time, but only from printk which
3844 * has the console mutex. Not perfect yet, but better than no locking
3846 static void blank_screen_t(unsigned long dummy
)
3848 if (unlikely(!keventd_up())) {
3849 mod_timer(&console_timer
, jiffies
+ (blankinterval
* HZ
));
3852 blank_timer_expired
= 1;
3853 schedule_work(&console_work
);
3856 void poke_blanked_console(void)
3858 WARN_CONSOLE_UNLOCKED();
3860 /* Add this so we quickly catch whoever might call us in a non
3861 * safe context. Nowadays, unblank_screen() isn't to be called in
3862 * atomic contexts and is allowed to schedule (with the special case
3863 * of oops_in_progress, but that isn't of any concern for this
3868 /* This isn't perfectly race free, but a race here would be mostly harmless,
3869 * at worse, we'll do a spurrious blank and it's unlikely
3871 del_timer(&console_timer
);
3872 blank_timer_expired
= 0;
3874 if (ignore_poke
|| !vc_cons
[fg_console
].d
|| vc_cons
[fg_console
].d
->vc_mode
== KD_GRAPHICS
)
3876 if (console_blanked
)
3878 else if (blankinterval
) {
3879 mod_timer(&console_timer
, jiffies
+ (blankinterval
* HZ
));
3880 blank_state
= blank_normal_wait
;
3888 static void set_palette(struct vc_data
*vc
)
3890 WARN_CONSOLE_UNLOCKED();
3892 if (vc
->vc_mode
!= KD_GRAPHICS
)
3893 vc
->vc_sw
->con_set_palette(vc
, color_table
);
3896 static int set_get_cmap(unsigned char __user
*arg
, int set
)
3900 WARN_CONSOLE_UNLOCKED();
3902 for (i
= 0; i
< 16; i
++)
3904 get_user(default_red
[i
], arg
++);
3905 get_user(default_grn
[i
], arg
++);
3906 get_user(default_blu
[i
], arg
++);
3908 put_user(default_red
[i
], arg
++);
3909 put_user(default_grn
[i
], arg
++);
3910 put_user(default_blu
[i
], arg
++);
3913 for (i
= 0; i
< MAX_NR_CONSOLES
; i
++)
3914 if (vc_cons_allocated(i
)) {
3915 for (j
= k
= 0; j
< 16; j
++) {
3916 vc_cons
[i
].d
->vc_palette
[k
++] = default_red
[j
];
3917 vc_cons
[i
].d
->vc_palette
[k
++] = default_grn
[j
];
3918 vc_cons
[i
].d
->vc_palette
[k
++] = default_blu
[j
];
3920 set_palette(vc_cons
[i
].d
);
3927 * Load palette into the DAC registers. arg points to a colour
3928 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
3931 int con_set_cmap(unsigned char __user
*arg
)
3936 rc
= set_get_cmap (arg
,1);
3942 int con_get_cmap(unsigned char __user
*arg
)
3947 rc
= set_get_cmap (arg
,0);
3953 void reset_palette(struct vc_data
*vc
)
3956 for (j
=k
=0; j
<16; j
++) {
3957 vc
->vc_palette
[k
++] = default_red
[j
];
3958 vc
->vc_palette
[k
++] = default_grn
[j
];
3959 vc
->vc_palette
[k
++] = default_blu
[j
];
3967 * Currently we only support fonts up to 32 pixels wide, at a maximum height
3968 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
3969 * depending on width) reserved for each character which is kinda wasty, but
3970 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
3971 * is up to the actual low-level console-driver convert data into its favorite
3972 * format (maybe we should add a `fontoffset' field to the `display'
3973 * structure so we won't have to convert the fontdata all the time.
3977 #define max_font_size 65536
3979 static int con_font_get(struct vc_data
*vc
, struct console_font_op
*op
)
3981 struct console_font font
;
3986 font
.data
= kmalloc(max_font_size
, GFP_KERNEL
);
3993 if (vc
->vc_mode
!= KD_TEXT
)
3995 else if (vc
->vc_sw
->con_font_get
)
3996 rc
= vc
->vc_sw
->con_font_get(vc
, &font
);
4004 c
= (font
.width
+7)/8 * 32 * font
.charcount
;
4006 if (op
->data
&& font
.charcount
> op
->charcount
)
4008 if (!(op
->flags
& KD_FONT_FLAG_OLD
)) {
4009 if (font
.width
> op
->width
|| font
.height
> op
->height
)
4012 if (font
.width
!= 8)
4014 else if ((op
->height
&& font
.height
> op
->height
) ||
4021 op
->height
= font
.height
;
4022 op
->width
= font
.width
;
4023 op
->charcount
= font
.charcount
;
4025 if (op
->data
&& copy_to_user(op
->data
, font
.data
, c
))
4033 static int con_font_set(struct vc_data
*vc
, struct console_font_op
*op
)
4035 struct console_font font
;
4039 if (vc
->vc_mode
!= KD_TEXT
)
4043 if (op
->charcount
> 512)
4045 if (!op
->height
) { /* Need to guess font height [compat] */
4047 u8 __user
*charmap
= op
->data
;
4050 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
4051 so that we can get rid of this soon */
4052 if (!(op
->flags
& KD_FONT_FLAG_OLD
))
4054 for (h
= 32; h
> 0; h
--)
4055 for (i
= 0; i
< op
->charcount
; i
++) {
4056 if (get_user(tmp
, &charmap
[32*i
+h
-1]))
4065 if (op
->width
<= 0 || op
->width
> 32 || op
->height
> 32)
4067 size
= (op
->width
+7)/8 * 32 * op
->charcount
;
4068 if (size
> max_font_size
)
4070 font
.charcount
= op
->charcount
;
4071 font
.height
= op
->height
;
4072 font
.width
= op
->width
;
4073 font
.data
= memdup_user(op
->data
, size
);
4074 if (IS_ERR(font
.data
))
4075 return PTR_ERR(font
.data
);
4077 if (vc
->vc_mode
!= KD_TEXT
)
4079 else if (vc
->vc_sw
->con_font_set
)
4080 rc
= vc
->vc_sw
->con_font_set(vc
, &font
, op
->flags
);
4088 static int con_font_default(struct vc_data
*vc
, struct console_font_op
*op
)
4090 struct console_font font
= {.width
= op
->width
, .height
= op
->height
};
4091 char name
[MAX_FONT_NAME
];
4098 else if (strncpy_from_user(name
, op
->data
, MAX_FONT_NAME
- 1) < 0)
4101 name
[MAX_FONT_NAME
- 1] = 0;
4104 if (vc
->vc_mode
!= KD_TEXT
) {
4108 if (vc
->vc_sw
->con_font_default
)
4109 rc
= vc
->vc_sw
->con_font_default(vc
, &font
, s
);
4114 op
->width
= font
.width
;
4115 op
->height
= font
.height
;
4120 static int con_font_copy(struct vc_data
*vc
, struct console_font_op
*op
)
4122 int con
= op
->height
;
4127 if (vc
->vc_mode
!= KD_TEXT
)
4129 else if (!vc
->vc_sw
->con_font_copy
)
4131 else if (con
< 0 || !vc_cons_allocated(con
))
4133 else if (con
== vc
->vc_num
) /* nothing to do */
4136 rc
= vc
->vc_sw
->con_font_copy(vc
, con
);
4141 int con_font_op(struct vc_data
*vc
, struct console_font_op
*op
)
4144 case KD_FONT_OP_SET
:
4145 return con_font_set(vc
, op
);
4146 case KD_FONT_OP_GET
:
4147 return con_font_get(vc
, op
);
4148 case KD_FONT_OP_SET_DEFAULT
:
4149 return con_font_default(vc
, op
);
4150 case KD_FONT_OP_COPY
:
4151 return con_font_copy(vc
, op
);
4157 * Interface exported to selection and vcs.
4160 /* used by selection */
4161 u16
screen_glyph(struct vc_data
*vc
, int offset
)
4163 u16 w
= scr_readw(screenpos(vc
, offset
, 1));
4166 if (w
& vc
->vc_hi_font_mask
)
4170 EXPORT_SYMBOL_GPL(screen_glyph
);
4172 /* used by vcs - note the word offset */
4173 unsigned short *screen_pos(struct vc_data
*vc
, int w_offset
, int viewed
)
4175 return screenpos(vc
, 2 * w_offset
, viewed
);
4178 void getconsxy(struct vc_data
*vc
, unsigned char *p
)
4184 void putconsxy(struct vc_data
*vc
, unsigned char *p
)
4187 gotoxy(vc
, p
[0], p
[1]);
4191 u16
vcs_scr_readw(struct vc_data
*vc
, const u16
*org
)
4193 if ((unsigned long)org
== vc
->vc_pos
&& softcursor_original
!= -1)
4194 return softcursor_original
;
4195 return scr_readw(org
);
4198 void vcs_scr_writew(struct vc_data
*vc
, u16 val
, u16
*org
)
4200 scr_writew(val
, org
);
4201 if ((unsigned long)org
== vc
->vc_pos
) {
4202 softcursor_original
= -1;
4207 void vcs_scr_updated(struct vc_data
*vc
)
4213 * Visible symbols for modules
4216 EXPORT_SYMBOL(color_table
);
4217 EXPORT_SYMBOL(default_red
);
4218 EXPORT_SYMBOL(default_grn
);
4219 EXPORT_SYMBOL(default_blu
);
4220 EXPORT_SYMBOL(update_region
);
4221 EXPORT_SYMBOL(redraw_screen
);
4222 EXPORT_SYMBOL(vc_resize
);
4223 EXPORT_SYMBOL(fg_console
);
4224 EXPORT_SYMBOL(console_blank_hook
);
4225 EXPORT_SYMBOL(console_blanked
);
4226 EXPORT_SYMBOL(vc_cons
);
4227 EXPORT_SYMBOL(global_cursor_default
);
4228 #ifndef VT_SINGLE_DRIVER
4229 EXPORT_SYMBOL(take_over_console
);
4230 EXPORT_SYMBOL(give_up_console
);