2 * linux/drivers/char/vt.c
4 * Copyright (C) 1991, 1992 Linus Torvalds
8 * Hopefully this will be a rather complete VT102 implementation.
10 * Beeping thanks to John T Kohl.
12 * Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics
13 * Chars, and VT100 enhancements by Peter MacDonald.
15 * Copy and paste function by Andrew Haylett,
16 * some enhancements by Alessandro Rubini.
18 * Code to check for different video-cards mostly by Galen Hunt,
19 * <g-hunt@ee.utah.edu>
21 * Rudimentary ISO 10646/Unicode/UTF-8 character set support by
22 * Markus Kuhn, <mskuhn@immd4.informatik.uni-erlangen.de>.
24 * Dynamic allocation of consoles, aeb@cwi.nl, May 1994
25 * Resizing of consoles, aeb, 940926
27 * Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94
30 * User-defined bell sound, new setterm control sequences and printk
31 * redirection by Martin Mares <mj@k332.feld.cvut.cz> 19-Nov-95
33 * APM screenblank bug fixed Takashi Manabe <manabe@roy.dsl.tutics.tut.jp>
35 * Merge with the abstract console driver by Geert Uytterhoeven
36 * <geert@linux-m68k.org>, Jan 1997.
38 * Original m68k console driver modifications by
40 * - Arno Griffioen <arno@usn.nl>
41 * - David Carter <carter@cs.bris.ac.uk>
43 * The abstract console driver provides a generic interface for a text
44 * console. It supports VGA text mode, frame buffer based graphical consoles
45 * and special graphics processors that are only accessible through some
46 * registers (e.g. a TMS340x0 GSP).
48 * The interface to the hardware is specified using a special structure
49 * (struct consw) which contains function pointers to console operations
50 * (see <linux/console.h> for more information).
52 * Support for changeable cursor shape
53 * by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997
55 * Ported to i386 and con_scrolldelta fixed
56 * by Emmanuel Marty <core@ggi-project.org>, April 1998
58 * Resurrected character buffers in videoram plus lots of other trickery
59 * by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998
61 * Removed old-style timers, introduced console_timer, made timer
62 * deletion SMP-safe. 17Jun00, Andrew Morton <andrewm@uow.edu.au>
64 * Removed console_lock, enabled interrupts across all console operations
65 * 13 March 2001, Andrew Morton
67 * Fixed UTF-8 mode so alternate charset modes always work according
68 * to control sequences interpreted in do_con_trol function
69 * preserving backward VT100 semigraphics compatibility,
70 * malformed UTF sequences represented as sequences of replacement glyphs,
71 * original codes or '?' as a last resort if replacement glyph is undefined
72 * by Adam Tla/lka <atlka@pg.gda.pl>, Aug 2006
75 #include <linux/module.h>
76 #include <linux/types.h>
77 #include <linux/sched.h>
78 #include <linux/tty.h>
79 #include <linux/tty_flip.h>
80 #include <linux/kernel.h>
81 #include <linux/string.h>
82 #include <linux/errno.h>
84 #include <linux/slab.h>
85 #include <linux/major.h>
87 #include <linux/console.h>
88 #include <linux/init.h>
89 #include <linux/mutex.h>
90 #include <linux/vt_kern.h>
91 #include <linux/selection.h>
92 #include <linux/tiocl.h>
93 #include <linux/kbd_kern.h>
94 #include <linux/consolemap.h>
95 #include <linux/timer.h>
96 #include <linux/interrupt.h>
97 #include <linux/workqueue.h>
98 #include <linux/bootmem.h>
100 #include <linux/font.h>
101 #include <linux/bitops.h>
104 #include <asm/system.h>
105 #include <asm/uaccess.h>
107 #define MAX_NR_CON_DRIVER 16
109 #define CON_DRIVER_FLAG_MODULE 1
110 #define CON_DRIVER_FLAG_INIT 2
111 #define CON_DRIVER_FLAG_ATTR 4
114 const struct consw
*con
;
123 static struct con_driver registered_con_driver
[MAX_NR_CON_DRIVER
];
124 const struct consw
*conswitchp
;
126 /* A bitmap for codes <32. A bit of 1 indicates that the code
127 * corresponding to that bit number invokes some special action
128 * (such as cursor movement) and should not be displayed as a
129 * glyph unless the disp_ctrl mode is explicitly enabled.
131 #define CTRL_ACTION 0x0d00ff81
132 #define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */
135 * Here is the default bell parameters: 750HZ, 1/8th of a second
137 #define DEFAULT_BELL_PITCH 750
138 #define DEFAULT_BELL_DURATION (HZ/8)
140 struct vc vc_cons
[MAX_NR_CONSOLES
];
142 #ifndef VT_SINGLE_DRIVER
143 static const struct consw
*con_driver_map
[MAX_NR_CONSOLES
];
146 static int con_open(struct tty_struct
*, struct file
*);
147 static void vc_init(struct vc_data
*vc
, unsigned int rows
,
148 unsigned int cols
, int do_clear
);
149 static void gotoxy(struct vc_data
*vc
, int new_x
, int new_y
);
150 static void save_cur(struct vc_data
*vc
);
151 static void reset_terminal(struct vc_data
*vc
, int do_clear
);
152 static void con_flush_chars(struct tty_struct
*tty
);
153 static int set_vesa_blanking(char __user
*p
);
154 static void set_cursor(struct vc_data
*vc
);
155 static void hide_cursor(struct vc_data
*vc
);
156 static void console_callback(struct work_struct
*ignored
);
157 static void blank_screen_t(unsigned long dummy
);
158 static void set_palette(struct vc_data
*vc
);
160 static int printable
; /* Is console ready for printing? */
161 static int default_utf8
;
162 module_param(default_utf8
, int, S_IRUGO
| S_IWUSR
);
165 * ignore_poke: don't unblank the screen when things are typed. This is
166 * mainly for the privacy of braille terminal users.
168 static int ignore_poke
;
170 int do_poke_blanked_console
;
173 static int vesa_blank_mode
; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
174 static int blankinterval
= 10*60*HZ
;
175 static int vesa_off_interval
;
177 static DECLARE_WORK(console_work
, console_callback
);
180 * fg_console is the current virtual console,
181 * last_console is the last used one,
182 * want_console is the console we want to switch to,
183 * kmsg_redirect is the console for kernel messages,
187 int want_console
= -1;
191 * For each existing display, we have a pointer to console currently visible
192 * on that display, allowing consoles other than fg_console to be refreshed
193 * appropriately. Unless the low-level driver supplies its own display_fg
194 * variable, we use this one for the "master display".
196 static struct vc_data
*master_display_fg
;
199 * Unfortunately, we need to delay tty echo when we're currently writing to the
200 * console since the code is (and always was) not re-entrant, so we schedule
201 * all flip requests to process context with schedule-task() and run it from
202 * console_callback().
206 * For the same reason, we defer scrollback to the console callback.
208 static int scrollback_delta
;
211 * Hook so that the power management routines can (un)blank
212 * the console on our behalf.
214 int (*console_blank_hook
)(int);
216 static DEFINE_TIMER(console_timer
, blank_screen_t
, 0, 0);
217 static int blank_state
;
218 static int blank_timer_expired
;
226 * Low-Level Functions
229 #define IS_FG(vc) ((vc)->vc_num == fg_console)
231 #ifdef VT_BUF_VRAM_ONLY
232 #define DO_UPDATE(vc) 0
234 #define DO_UPDATE(vc) CON_IS_VISIBLE(vc)
237 static inline unsigned short *screenpos(struct vc_data
*vc
, int offset
, int viewed
)
242 p
= (unsigned short *)(vc
->vc_origin
+ offset
);
243 else if (!vc
->vc_sw
->con_screen_pos
)
244 p
= (unsigned short *)(vc
->vc_visible_origin
+ offset
);
246 p
= vc
->vc_sw
->con_screen_pos(vc
, offset
);
250 static inline void scrolldelta(int lines
)
252 scrollback_delta
+= lines
;
253 schedule_console_callback();
256 void schedule_console_callback(void)
258 schedule_work(&console_work
);
261 static void scrup(struct vc_data
*vc
, unsigned int t
, unsigned int b
, int nr
)
263 unsigned short *d
, *s
;
267 if (b
> vc
->vc_rows
|| t
>= b
|| nr
< 1)
269 if (CON_IS_VISIBLE(vc
) && vc
->vc_sw
->con_scroll(vc
, t
, b
, SM_UP
, nr
))
271 d
= (unsigned short *)(vc
->vc_origin
+ vc
->vc_size_row
* t
);
272 s
= (unsigned short *)(vc
->vc_origin
+ vc
->vc_size_row
* (t
+ nr
));
273 scr_memmovew(d
, s
, (b
- t
- nr
) * vc
->vc_size_row
);
274 scr_memsetw(d
+ (b
- t
- nr
) * vc
->vc_cols
, vc
->vc_video_erase_char
,
275 vc
->vc_size_row
* nr
);
278 static void scrdown(struct vc_data
*vc
, unsigned int t
, unsigned int b
, int nr
)
285 if (b
> vc
->vc_rows
|| t
>= b
|| nr
< 1)
287 if (CON_IS_VISIBLE(vc
) && vc
->vc_sw
->con_scroll(vc
, t
, b
, SM_DOWN
, nr
))
289 s
= (unsigned short *)(vc
->vc_origin
+ vc
->vc_size_row
* t
);
290 step
= vc
->vc_cols
* nr
;
291 scr_memmovew(s
+ step
, s
, (b
- t
- nr
) * vc
->vc_size_row
);
292 scr_memsetw(s
, vc
->vc_video_erase_char
, 2 * step
);
295 static void do_update_region(struct vc_data
*vc
, unsigned long start
, int count
)
297 #ifndef VT_BUF_VRAM_ONLY
298 unsigned int xx
, yy
, offset
;
302 if (!vc
->vc_sw
->con_getxy
) {
303 offset
= (start
- vc
->vc_origin
) / 2;
304 xx
= offset
% vc
->vc_cols
;
305 yy
= offset
/ vc
->vc_cols
;
308 start
= vc
->vc_sw
->con_getxy(vc
, start
, &nxx
, &nyy
);
312 u16 attrib
= scr_readw(p
) & 0xff00;
315 while (xx
< vc
->vc_cols
&& count
) {
316 if (attrib
!= (scr_readw(p
) & 0xff00)) {
318 vc
->vc_sw
->con_putcs(vc
, q
, p
-q
, yy
, startx
);
321 attrib
= scr_readw(p
) & 0xff00;
328 vc
->vc_sw
->con_putcs(vc
, q
, p
-q
, yy
, startx
);
333 if (vc
->vc_sw
->con_getxy
) {
335 start
= vc
->vc_sw
->con_getxy(vc
, start
, NULL
, NULL
);
341 void update_region(struct vc_data
*vc
, unsigned long start
, int count
)
343 WARN_CONSOLE_UNLOCKED();
347 do_update_region(vc
, start
, count
);
352 /* Structure of attributes is hardware-dependent */
354 static u8
build_attr(struct vc_data
*vc
, u8 _color
, u8 _intensity
, u8 _blink
,
355 u8 _underline
, u8 _reverse
, u8 _italic
)
357 if (vc
->vc_sw
->con_build_attr
)
358 return vc
->vc_sw
->con_build_attr(vc
, _color
, _intensity
,
359 _blink
, _underline
, _reverse
, _italic
);
361 #ifndef VT_BUF_VRAM_ONLY
363 * ++roman: I completely changed the attribute format for monochrome
364 * mode (!can_do_color). The formerly used MDA (monochrome display
365 * adapter) format didn't allow the combination of certain effects.
366 * Now the attribute is just a bit vector:
367 * Bit 0..1: intensity (0..2)
374 if (!vc
->vc_can_do_color
)
377 (_underline
? 4 : 0) |
381 a
= (a
& 0xF0) | vc
->vc_itcolor
;
383 a
= (a
& 0xf0) | vc
->vc_ulcolor
;
384 else if (_intensity
== 0)
385 a
= (a
& 0xf0) | vc
->vc_ulcolor
;
387 a
= ((a
) & 0x88) | ((((a
) >> 4) | ((a
) << 4)) & 0x77);
392 if (vc
->vc_hi_font_mask
== 0x100)
401 static void update_attr(struct vc_data
*vc
)
403 vc
->vc_attr
= build_attr(vc
, vc
->vc_color
, vc
->vc_intensity
,
404 vc
->vc_blink
, vc
->vc_underline
,
405 vc
->vc_reverse
^ vc
->vc_decscnm
, vc
->vc_italic
);
406 vc
->vc_video_erase_char
= (build_attr(vc
, vc
->vc_color
, 1, vc
->vc_blink
, 0, vc
->vc_decscnm
, 0) << 8) | ' ';
409 /* Note: inverting the screen twice should revert to the original state */
410 void invert_screen(struct vc_data
*vc
, int offset
, int count
, int viewed
)
414 WARN_CONSOLE_UNLOCKED();
417 p
= screenpos(vc
, offset
, viewed
);
418 if (vc
->vc_sw
->con_invert_region
)
419 vc
->vc_sw
->con_invert_region(vc
, p
, count
);
420 #ifndef VT_BUF_VRAM_ONLY
426 if (!vc
->vc_can_do_color
) {
433 } else if (vc
->vc_hi_font_mask
== 0x100) {
436 a
= ((a
) & 0x11ff) | (((a
) & 0xe000) >> 4) | (((a
) & 0x0e00) << 4);
443 a
= ((a
) & 0x88ff) | (((a
) & 0x7000) >> 4) | (((a
) & 0x0700) << 4);
451 do_update_region(vc
, (unsigned long) p
, count
);
454 /* used by selection: complement pointer position */
455 void complement_pos(struct vc_data
*vc
, int offset
)
457 static int old_offset
= -1;
458 static unsigned short old
;
459 static unsigned short oldx
, oldy
;
461 WARN_CONSOLE_UNLOCKED();
463 if (old_offset
!= -1 && old_offset
>= 0 &&
464 old_offset
< vc
->vc_screenbuf_size
) {
465 scr_writew(old
, screenpos(vc
, old_offset
, 1));
467 vc
->vc_sw
->con_putc(vc
, old
, oldy
, oldx
);
472 if (offset
!= -1 && offset
>= 0 &&
473 offset
< vc
->vc_screenbuf_size
) {
476 p
= screenpos(vc
, offset
, 1);
478 new = old
^ vc
->vc_complement_mask
;
481 oldx
= (offset
>> 1) % vc
->vc_cols
;
482 oldy
= (offset
>> 1) / vc
->vc_cols
;
483 vc
->vc_sw
->con_putc(vc
, new, oldy
, oldx
);
489 static void insert_char(struct vc_data
*vc
, unsigned int nr
)
491 unsigned short *p
, *q
= (unsigned short *)vc
->vc_pos
;
493 p
= q
+ vc
->vc_cols
- nr
- vc
->vc_x
;
495 scr_writew(scr_readw(p
), p
+ nr
);
496 scr_memsetw(q
, vc
->vc_video_erase_char
, nr
* 2);
497 vc
->vc_need_wrap
= 0;
499 unsigned short oldattr
= vc
->vc_attr
;
500 vc
->vc_sw
->con_bmove(vc
, vc
->vc_y
, vc
->vc_x
, vc
->vc_y
, vc
->vc_x
+ nr
, 1,
501 vc
->vc_cols
- vc
->vc_x
- nr
);
502 vc
->vc_attr
= vc
->vc_video_erase_char
>> 8;
504 vc
->vc_sw
->con_putc(vc
, vc
->vc_video_erase_char
, vc
->vc_y
, vc
->vc_x
+ nr
);
505 vc
->vc_attr
= oldattr
;
509 static void delete_char(struct vc_data
*vc
, unsigned int nr
)
511 unsigned int i
= vc
->vc_x
;
512 unsigned short *p
= (unsigned short *)vc
->vc_pos
;
514 while (++i
<= vc
->vc_cols
- nr
) {
515 scr_writew(scr_readw(p
+nr
), p
);
518 scr_memsetw(p
, vc
->vc_video_erase_char
, nr
* 2);
519 vc
->vc_need_wrap
= 0;
521 unsigned short oldattr
= vc
->vc_attr
;
522 vc
->vc_sw
->con_bmove(vc
, vc
->vc_y
, vc
->vc_x
+ nr
, vc
->vc_y
, vc
->vc_x
, 1,
523 vc
->vc_cols
- vc
->vc_x
- nr
);
524 vc
->vc_attr
= vc
->vc_video_erase_char
>> 8;
526 vc
->vc_sw
->con_putc(vc
, vc
->vc_video_erase_char
, vc
->vc_y
,
527 vc
->vc_cols
- 1 - nr
);
528 vc
->vc_attr
= oldattr
;
532 static int softcursor_original
;
534 static void add_softcursor(struct vc_data
*vc
)
536 int i
= scr_readw((u16
*) vc
->vc_pos
);
537 u32 type
= vc
->vc_cursor_type
;
539 if (! (type
& 0x10)) return;
540 if (softcursor_original
!= -1) return;
541 softcursor_original
= i
;
542 i
|= ((type
>> 8) & 0xff00 );
543 i
^= ((type
) & 0xff00 );
544 if ((type
& 0x20) && ((softcursor_original
& 0x7000) == (i
& 0x7000))) i
^= 0x7000;
545 if ((type
& 0x40) && ((i
& 0x700) == ((i
& 0x7000) >> 4))) i
^= 0x0700;
546 scr_writew(i
, (u16
*) vc
->vc_pos
);
548 vc
->vc_sw
->con_putc(vc
, i
, vc
->vc_y
, vc
->vc_x
);
551 static void hide_softcursor(struct vc_data
*vc
)
553 if (softcursor_original
!= -1) {
554 scr_writew(softcursor_original
, (u16
*)vc
->vc_pos
);
556 vc
->vc_sw
->con_putc(vc
, softcursor_original
,
558 softcursor_original
= -1;
562 static void hide_cursor(struct vc_data
*vc
)
566 vc
->vc_sw
->con_cursor(vc
, CM_ERASE
);
570 static void set_cursor(struct vc_data
*vc
)
572 if (!IS_FG(vc
) || console_blanked
||
573 vc
->vc_mode
== KD_GRAPHICS
)
579 if ((vc
->vc_cursor_type
& 0x0f) != 1)
580 vc
->vc_sw
->con_cursor(vc
, CM_DRAW
);
585 static void set_origin(struct vc_data
*vc
)
587 WARN_CONSOLE_UNLOCKED();
589 if (!CON_IS_VISIBLE(vc
) ||
590 !vc
->vc_sw
->con_set_origin
||
591 !vc
->vc_sw
->con_set_origin(vc
))
592 vc
->vc_origin
= (unsigned long)vc
->vc_screenbuf
;
593 vc
->vc_visible_origin
= vc
->vc_origin
;
594 vc
->vc_scr_end
= vc
->vc_origin
+ vc
->vc_screenbuf_size
;
595 vc
->vc_pos
= vc
->vc_origin
+ vc
->vc_size_row
* vc
->vc_y
+ 2 * vc
->vc_x
;
598 static inline void save_screen(struct vc_data
*vc
)
600 WARN_CONSOLE_UNLOCKED();
602 if (vc
->vc_sw
->con_save_screen
)
603 vc
->vc_sw
->con_save_screen(vc
);
607 * Redrawing of screen
610 static void clear_buffer_attributes(struct vc_data
*vc
)
612 unsigned short *p
= (unsigned short *)vc
->vc_origin
;
613 int count
= vc
->vc_screenbuf_size
/ 2;
614 int mask
= vc
->vc_hi_font_mask
| 0xff;
616 for (; count
> 0; count
--, p
++) {
617 scr_writew((scr_readw(p
)&mask
) | (vc
->vc_video_erase_char
& ~mask
), p
);
621 void redraw_screen(struct vc_data
*vc
, int is_switch
)
625 WARN_CONSOLE_UNLOCKED();
629 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
634 struct vc_data
*old_vc
= vc_cons
[fg_console
].d
;
637 if (!CON_IS_VISIBLE(vc
))
639 *vc
->vc_display_fg
= vc
;
640 fg_console
= vc
->vc_num
;
642 if (!CON_IS_VISIBLE(old_vc
)) {
653 int old_was_color
= vc
->vc_can_do_color
;
656 update
= vc
->vc_sw
->con_switch(vc
);
659 * If console changed from mono<->color, the best we can do
660 * is to clear the buffer attributes. As it currently stands,
661 * rebuilding new attributes from the old buffer is not doable
662 * without overly complex code.
664 if (old_was_color
!= vc
->vc_can_do_color
) {
666 clear_buffer_attributes(vc
);
668 if (update
&& vc
->vc_mode
!= KD_GRAPHICS
)
669 do_update_region(vc
, vc
->vc_origin
, vc
->vc_screenbuf_size
/ 2);
674 compute_shiftstate();
679 * Allocation, freeing and resizing of VTs.
682 int vc_cons_allocated(unsigned int i
)
684 return (i
< MAX_NR_CONSOLES
&& vc_cons
[i
].d
);
687 static void visual_init(struct vc_data
*vc
, int num
, int init
)
689 /* ++Geert: vc->vc_sw->con_init determines console size */
691 module_put(vc
->vc_sw
->owner
);
692 vc
->vc_sw
= conswitchp
;
693 #ifndef VT_SINGLE_DRIVER
694 if (con_driver_map
[num
])
695 vc
->vc_sw
= con_driver_map
[num
];
697 __module_get(vc
->vc_sw
->owner
);
699 vc
->vc_display_fg
= &master_display_fg
;
700 vc
->vc_uni_pagedir_loc
= &vc
->vc_uni_pagedir
;
701 vc
->vc_uni_pagedir
= 0;
702 vc
->vc_hi_font_mask
= 0;
703 vc
->vc_complement_mask
= 0;
704 vc
->vc_can_do_color
= 0;
705 vc
->vc_sw
->con_init(vc
, init
);
706 if (!vc
->vc_complement_mask
)
707 vc
->vc_complement_mask
= vc
->vc_can_do_color
? 0x7700 : 0x0800;
708 vc
->vc_s_complement_mask
= vc
->vc_complement_mask
;
709 vc
->vc_size_row
= vc
->vc_cols
<< 1;
710 vc
->vc_screenbuf_size
= vc
->vc_rows
* vc
->vc_size_row
;
713 int vc_allocate(unsigned int currcons
) /* return 0 on success */
715 WARN_CONSOLE_UNLOCKED();
717 if (currcons
>= MAX_NR_CONSOLES
)
719 if (!vc_cons
[currcons
].d
) {
722 /* prevent users from taking too much memory */
723 if (currcons
>= MAX_NR_USER_CONSOLES
&& !capable(CAP_SYS_RESOURCE
))
726 /* due to the granularity of kmalloc, we waste some memory here */
727 /* the alloc is done in two steps, to optimize the common situation
728 of a 25x80 console (structsize=216, screenbuf_size=4000) */
729 /* although the numbers above are not valid since long ago, the
730 point is still up-to-date and the comment still has its value
731 even if only as a historical artifact. --mj, July 1998 */
732 vc
= kmalloc(sizeof(struct vc_data
), GFP_KERNEL
);
735 memset(vc
, 0, sizeof(*vc
));
736 vc_cons
[currcons
].d
= vc
;
737 INIT_WORK(&vc_cons
[currcons
].SAK_work
, vc_SAK
);
738 visual_init(vc
, currcons
, 1);
739 if (!*vc
->vc_uni_pagedir_loc
)
740 con_set_default_unimap(vc
);
741 if (!vc
->vc_kmalloced
)
742 vc
->vc_screenbuf
= kmalloc(vc
->vc_screenbuf_size
, GFP_KERNEL
);
743 if (!vc
->vc_screenbuf
) {
745 vc_cons
[currcons
].d
= NULL
;
748 vc
->vc_kmalloced
= 1;
749 vc_init(vc
, vc
->vc_rows
, vc
->vc_cols
, 1);
754 static inline int resize_screen(struct vc_data
*vc
, int width
, int height
)
756 /* Resizes the resolution of the display adapater */
759 if (vc
->vc_mode
!= KD_GRAPHICS
&& vc
->vc_sw
->con_resize
)
760 err
= vc
->vc_sw
->con_resize(vc
, width
, height
);
765 * Change # of rows and columns (0 means unchanged/the size of fg_console)
766 * [this is to be used together with some user program
767 * like resize that changes the hardware videomode]
769 #define VC_RESIZE_MAXCOL (32767)
770 #define VC_RESIZE_MAXROW (32767)
771 int vc_resize(struct vc_data
*vc
, unsigned int cols
, unsigned int lines
)
773 unsigned long old_origin
, new_origin
, new_scr_end
, rlth
, rrem
, err
= 0;
774 unsigned int old_cols
, old_rows
, old_row_size
, old_screen_size
;
775 unsigned int new_cols
, new_rows
, new_row_size
, new_screen_size
;
777 unsigned short *newscreen
;
779 WARN_CONSOLE_UNLOCKED();
784 if (cols
> VC_RESIZE_MAXCOL
|| lines
> VC_RESIZE_MAXROW
)
787 new_cols
= (cols
? cols
: vc
->vc_cols
);
788 new_rows
= (lines
? lines
: vc
->vc_rows
);
789 new_row_size
= new_cols
<< 1;
790 new_screen_size
= new_row_size
* new_rows
;
792 if (new_cols
== vc
->vc_cols
&& new_rows
== vc
->vc_rows
)
795 newscreen
= kmalloc(new_screen_size
, GFP_USER
);
799 old_rows
= vc
->vc_rows
;
800 old_cols
= vc
->vc_cols
;
801 old_row_size
= vc
->vc_size_row
;
802 old_screen_size
= vc
->vc_screenbuf_size
;
804 err
= resize_screen(vc
, new_cols
, new_rows
);
810 vc
->vc_rows
= new_rows
;
811 vc
->vc_cols
= new_cols
;
812 vc
->vc_size_row
= new_row_size
;
813 vc
->vc_screenbuf_size
= new_screen_size
;
815 rlth
= min(old_row_size
, new_row_size
);
816 rrem
= new_row_size
- rlth
;
817 old_origin
= vc
->vc_origin
;
818 new_origin
= (long) newscreen
;
819 new_scr_end
= new_origin
+ new_screen_size
;
821 if (vc
->vc_y
> new_rows
) {
822 if (old_rows
- vc
->vc_y
< new_rows
) {
824 * Cursor near the bottom, copy contents from the
827 old_origin
+= (old_rows
- new_rows
) * old_row_size
;
828 end
= vc
->vc_scr_end
;
831 * Cursor is in no man's land, copy 1/2 screenful
832 * from the top and bottom of cursor position
834 old_origin
+= (vc
->vc_y
- new_rows
/2) * old_row_size
;
835 end
= old_origin
+ (old_row_size
* new_rows
);
839 * Cursor near the top, copy contents from the top of buffer
841 end
= (old_rows
> new_rows
) ? old_origin
+
842 (old_row_size
* new_rows
) :
847 while (old_origin
< end
) {
848 scr_memcpyw((unsigned short *) new_origin
,
849 (unsigned short *) old_origin
, rlth
);
851 scr_memsetw((void *)(new_origin
+ rlth
),
852 vc
->vc_video_erase_char
, rrem
);
853 old_origin
+= old_row_size
;
854 new_origin
+= new_row_size
;
856 if (new_scr_end
> new_origin
)
857 scr_memsetw((void *)new_origin
, vc
->vc_video_erase_char
,
858 new_scr_end
- new_origin
);
859 if (vc
->vc_kmalloced
)
860 kfree(vc
->vc_screenbuf
);
861 vc
->vc_screenbuf
= newscreen
;
862 vc
->vc_kmalloced
= 1;
863 vc
->vc_screenbuf_size
= new_screen_size
;
866 /* do part of a reset_terminal() */
868 vc
->vc_bottom
= vc
->vc_rows
;
869 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
);
873 struct winsize ws
, *cws
= &vc
->vc_tty
->winsize
;
875 memset(&ws
, 0, sizeof(ws
));
876 ws
.ws_row
= vc
->vc_rows
;
877 ws
.ws_col
= vc
->vc_cols
;
878 ws
.ws_ypixel
= vc
->vc_scan_lines
;
879 if ((ws
.ws_row
!= cws
->ws_row
|| ws
.ws_col
!= cws
->ws_col
) &&
881 kill_pgrp(vc
->vc_tty
->pgrp
, SIGWINCH
, 1);
885 if (CON_IS_VISIBLE(vc
))
890 int vc_lock_resize(struct vc_data
*vc
, unsigned int cols
, unsigned int lines
)
894 acquire_console_sem();
895 rc
= vc_resize(vc
, cols
, lines
);
896 release_console_sem();
900 void vc_deallocate(unsigned int currcons
)
902 WARN_CONSOLE_UNLOCKED();
904 if (vc_cons_allocated(currcons
)) {
905 struct vc_data
*vc
= vc_cons
[currcons
].d
;
906 vc
->vc_sw
->con_deinit(vc
);
908 module_put(vc
->vc_sw
->owner
);
909 if (vc
->vc_kmalloced
)
910 kfree(vc
->vc_screenbuf
);
911 if (currcons
>= MIN_NR_CONSOLES
)
913 vc_cons
[currcons
].d
= NULL
;
921 #define set_kbd(vc, x) set_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
922 #define clr_kbd(vc, x) clr_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
923 #define is_kbd(vc, x) vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
925 #define decarm VC_REPEAT
926 #define decckm VC_CKMODE
927 #define kbdapplic VC_APPLIC
931 * this is what the terminal answers to a ESC-Z or csi0c query.
933 #define VT100ID "\033[?1;2c"
934 #define VT102ID "\033[?6c"
936 unsigned char color_table
[] = { 0, 4, 2, 6, 1, 5, 3, 7,
937 8,12,10,14, 9,13,11,15 };
939 /* the default colour table, for VGA+ colour systems */
940 int default_red
[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
941 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
942 int default_grn
[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
943 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
944 int default_blu
[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
945 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
947 module_param_array(default_red
, int, NULL
, S_IRUGO
| S_IWUSR
);
948 module_param_array(default_grn
, int, NULL
, S_IRUGO
| S_IWUSR
);
949 module_param_array(default_blu
, int, NULL
, S_IRUGO
| S_IWUSR
);
952 * gotoxy() must verify all boundaries, because the arguments
953 * might also be negative. If the given position is out of
954 * bounds, the cursor is placed at the nearest margin.
956 static void gotoxy(struct vc_data
*vc
, int new_x
, int new_y
)
963 if (new_x
>= vc
->vc_cols
)
964 vc
->vc_x
= vc
->vc_cols
- 1;
971 max_y
= vc
->vc_bottom
;
978 else if (new_y
>= max_y
)
979 vc
->vc_y
= max_y
- 1;
982 vc
->vc_pos
= vc
->vc_origin
+ vc
->vc_y
* vc
->vc_size_row
+ (vc
->vc_x
<<1);
983 vc
->vc_need_wrap
= 0;
986 /* for absolute user moves, when decom is set */
987 static void gotoxay(struct vc_data
*vc
, int new_x
, int new_y
)
989 gotoxy(vc
, new_x
, vc
->vc_decom
? (vc
->vc_top
+ new_y
) : new_y
);
992 void scrollback(struct vc_data
*vc
, int lines
)
995 lines
= vc
->vc_rows
/ 2;
999 void scrollfront(struct vc_data
*vc
, int lines
)
1002 lines
= vc
->vc_rows
/ 2;
1006 static void lf(struct vc_data
*vc
)
1008 /* don't scroll if above bottom of scrolling region, or
1009 * if below scrolling region
1011 if (vc
->vc_y
+ 1 == vc
->vc_bottom
)
1012 scrup(vc
, vc
->vc_top
, vc
->vc_bottom
, 1);
1013 else if (vc
->vc_y
< vc
->vc_rows
- 1) {
1015 vc
->vc_pos
+= vc
->vc_size_row
;
1017 vc
->vc_need_wrap
= 0;
1020 static void ri(struct vc_data
*vc
)
1022 /* don't scroll if below top of scrolling region, or
1023 * if above scrolling region
1025 if (vc
->vc_y
== vc
->vc_top
)
1026 scrdown(vc
, vc
->vc_top
, vc
->vc_bottom
, 1);
1027 else if (vc
->vc_y
> 0) {
1029 vc
->vc_pos
-= vc
->vc_size_row
;
1031 vc
->vc_need_wrap
= 0;
1034 static inline void cr(struct vc_data
*vc
)
1036 vc
->vc_pos
-= vc
->vc_x
<< 1;
1037 vc
->vc_need_wrap
= vc
->vc_x
= 0;
1040 static inline void bs(struct vc_data
*vc
)
1045 vc
->vc_need_wrap
= 0;
1049 static inline void del(struct vc_data
*vc
)
1054 static void csi_J(struct vc_data
*vc
, int vpar
)
1057 unsigned short * start
;
1060 case 0: /* erase from cursor to end of display */
1061 count
= (vc
->vc_scr_end
- vc
->vc_pos
) >> 1;
1062 start
= (unsigned short *)vc
->vc_pos
;
1063 if (DO_UPDATE(vc
)) {
1064 /* do in two stages */
1065 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, vc
->vc_x
, 1,
1066 vc
->vc_cols
- vc
->vc_x
);
1067 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
+ 1, 0,
1068 vc
->vc_rows
- vc
->vc_y
- 1,
1072 case 1: /* erase from start to cursor */
1073 count
= ((vc
->vc_pos
- vc
->vc_origin
) >> 1) + 1;
1074 start
= (unsigned short *)vc
->vc_origin
;
1075 if (DO_UPDATE(vc
)) {
1076 /* do in two stages */
1077 vc
->vc_sw
->con_clear(vc
, 0, 0, vc
->vc_y
,
1079 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, 0, 1,
1083 case 2: /* erase whole display */
1084 count
= vc
->vc_cols
* vc
->vc_rows
;
1085 start
= (unsigned short *)vc
->vc_origin
;
1087 vc
->vc_sw
->con_clear(vc
, 0, 0,
1094 scr_memsetw(start
, vc
->vc_video_erase_char
, 2 * count
);
1095 vc
->vc_need_wrap
= 0;
1098 static void csi_K(struct vc_data
*vc
, int vpar
)
1101 unsigned short * start
;
1104 case 0: /* erase from cursor to end of line */
1105 count
= vc
->vc_cols
- vc
->vc_x
;
1106 start
= (unsigned short *)vc
->vc_pos
;
1108 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, vc
->vc_x
, 1,
1109 vc
->vc_cols
- vc
->vc_x
);
1111 case 1: /* erase from start of line to cursor */
1112 start
= (unsigned short *)(vc
->vc_pos
- (vc
->vc_x
<< 1));
1113 count
= vc
->vc_x
+ 1;
1115 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, 0, 1,
1118 case 2: /* erase whole line */
1119 start
= (unsigned short *)(vc
->vc_pos
- (vc
->vc_x
<< 1));
1120 count
= vc
->vc_cols
;
1122 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, 0, 1,
1128 scr_memsetw(start
, vc
->vc_video_erase_char
, 2 * count
);
1129 vc
->vc_need_wrap
= 0;
1132 static void csi_X(struct vc_data
*vc
, int vpar
) /* erase the following vpar positions */
1138 count
= (vpar
> vc
->vc_cols
- vc
->vc_x
) ? (vc
->vc_cols
- vc
->vc_x
) : vpar
;
1140 scr_memsetw((unsigned short *)vc
->vc_pos
, vc
->vc_video_erase_char
, 2 * count
);
1142 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, vc
->vc_x
, 1, count
);
1143 vc
->vc_need_wrap
= 0;
1146 static void default_attr(struct vc_data
*vc
)
1148 vc
->vc_intensity
= 1;
1150 vc
->vc_underline
= 0;
1153 vc
->vc_color
= vc
->vc_def_color
;
1156 /* console_sem is held */
1157 static void csi_m(struct vc_data
*vc
)
1161 for (i
= 0; i
<= vc
->vc_npar
; i
++)
1162 switch (vc
->vc_par
[i
]) {
1163 case 0: /* all attributes off */
1167 vc
->vc_intensity
= 2;
1170 vc
->vc_intensity
= 0;
1176 vc
->vc_underline
= 1;
1184 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1185 * Select primary font, don't display
1186 * control chars if defined, don't set
1189 vc
->vc_translate
= set_translate(vc
->vc_charset
== 0
1191 : vc
->vc_G1_charset
, vc
);
1192 vc
->vc_disp_ctrl
= 0;
1193 vc
->vc_toggle_meta
= 0;
1195 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1196 * Select first alternate font, lets
1197 * chars < 32 be displayed as ROM chars.
1199 vc
->vc_translate
= set_translate(IBMPC_MAP
, vc
);
1200 vc
->vc_disp_ctrl
= 1;
1201 vc
->vc_toggle_meta
= 0;
1203 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1204 * Select second alternate font, toggle
1205 * high bit before displaying as ROM char.
1207 vc
->vc_translate
= set_translate(IBMPC_MAP
, vc
);
1208 vc
->vc_disp_ctrl
= 1;
1209 vc
->vc_toggle_meta
= 1;
1213 vc
->vc_intensity
= 1;
1219 vc
->vc_underline
= 0;
1227 case 38: /* ANSI X3.64-1979 (SCO-ish?)
1228 * Enables underscore, white foreground
1229 * with white underscore (Linux - use
1230 * default foreground).
1232 vc
->vc_color
= (vc
->vc_def_color
& 0x0f) | (vc
->vc_color
& 0xf0);
1233 vc
->vc_underline
= 1;
1235 case 39: /* ANSI X3.64-1979 (SCO-ish?)
1236 * Disable underline option.
1237 * Reset colour to default? It did this
1240 vc
->vc_color
= (vc
->vc_def_color
& 0x0f) | (vc
->vc_color
& 0xf0);
1241 vc
->vc_underline
= 0;
1244 vc
->vc_color
= (vc
->vc_def_color
& 0xf0) | (vc
->vc_color
& 0x0f);
1247 if (vc
->vc_par
[i
] >= 30 && vc
->vc_par
[i
] <= 37)
1248 vc
->vc_color
= color_table
[vc
->vc_par
[i
] - 30]
1249 | (vc
->vc_color
& 0xf0);
1250 else if (vc
->vc_par
[i
] >= 40 && vc
->vc_par
[i
] <= 47)
1251 vc
->vc_color
= (color_table
[vc
->vc_par
[i
] - 40] << 4)
1252 | (vc
->vc_color
& 0x0f);
1258 static void respond_string(const char *p
, struct tty_struct
*tty
)
1261 tty_insert_flip_char(tty
, *p
, 0);
1264 con_schedule_flip(tty
);
1267 static void cursor_report(struct vc_data
*vc
, struct tty_struct
*tty
)
1271 sprintf(buf
, "\033[%d;%dR", vc
->vc_y
+ (vc
->vc_decom
? vc
->vc_top
+ 1 : 1), vc
->vc_x
+ 1);
1272 respond_string(buf
, tty
);
1275 static inline void status_report(struct tty_struct
*tty
)
1277 respond_string("\033[0n", tty
); /* Terminal ok */
1280 static inline void respond_ID(struct tty_struct
* tty
)
1282 respond_string(VT102ID
, tty
);
1285 void mouse_report(struct tty_struct
*tty
, int butt
, int mrx
, int mry
)
1289 sprintf(buf
, "\033[M%c%c%c", (char)(' ' + butt
), (char)('!' + mrx
),
1291 respond_string(buf
, tty
);
1294 /* invoked via ioctl(TIOCLINUX) and through set_selection */
1295 int mouse_reporting(void)
1297 return vc_cons
[fg_console
].d
->vc_report_mouse
;
1300 /* console_sem is held */
1301 static void set_mode(struct vc_data
*vc
, int on_off
)
1305 for (i
= 0; i
<= vc
->vc_npar
; i
++)
1307 switch(vc
->vc_par
[i
]) { /* DEC private modes set/reset */
1308 case 1: /* Cursor keys send ^[Ox/^[[x */
1310 set_kbd(vc
, decckm
);
1312 clr_kbd(vc
, decckm
);
1314 case 3: /* 80/132 mode switch unimplemented */
1315 vc
->vc_deccolm
= on_off
;
1317 vc_resize(deccolm
? 132 : 80, vc
->vc_rows
);
1318 /* this alone does not suffice; some user mode
1319 utility has to change the hardware regs */
1322 case 5: /* Inverted screen on/off */
1323 if (vc
->vc_decscnm
!= on_off
) {
1324 vc
->vc_decscnm
= on_off
;
1325 invert_screen(vc
, 0, vc
->vc_screenbuf_size
, 0);
1329 case 6: /* Origin relative/absolute */
1330 vc
->vc_decom
= on_off
;
1333 case 7: /* Autowrap on/off */
1334 vc
->vc_decawm
= on_off
;
1336 case 8: /* Autorepeat on/off */
1338 set_kbd(vc
, decarm
);
1340 clr_kbd(vc
, decarm
);
1343 vc
->vc_report_mouse
= on_off
? 1 : 0;
1345 case 25: /* Cursor on/off */
1346 vc
->vc_deccm
= on_off
;
1349 vc
->vc_report_mouse
= on_off
? 2 : 0;
1353 switch(vc
->vc_par
[i
]) { /* ANSI modes set/reset */
1354 case 3: /* Monitor (display ctrls) */
1355 vc
->vc_disp_ctrl
= on_off
;
1357 case 4: /* Insert Mode on/off */
1358 vc
->vc_decim
= on_off
;
1360 case 20: /* Lf, Enter == CrLf/Lf */
1370 /* console_sem is held */
1371 static void setterm_command(struct vc_data
*vc
)
1373 switch(vc
->vc_par
[0]) {
1374 case 1: /* set color for underline mode */
1375 if (vc
->vc_can_do_color
&&
1376 vc
->vc_par
[1] < 16) {
1377 vc
->vc_ulcolor
= color_table
[vc
->vc_par
[1]];
1378 if (vc
->vc_underline
)
1382 case 2: /* set color for half intensity mode */
1383 if (vc
->vc_can_do_color
&&
1384 vc
->vc_par
[1] < 16) {
1385 vc
->vc_halfcolor
= color_table
[vc
->vc_par
[1]];
1386 if (vc
->vc_intensity
== 0)
1390 case 8: /* store colors as defaults */
1391 vc
->vc_def_color
= vc
->vc_attr
;
1392 if (vc
->vc_hi_font_mask
== 0x100)
1393 vc
->vc_def_color
>>= 1;
1397 case 9: /* set blanking interval */
1398 blankinterval
= ((vc
->vc_par
[1] < 60) ? vc
->vc_par
[1] : 60) * 60 * HZ
;
1399 poke_blanked_console();
1401 case 10: /* set bell frequency in Hz */
1402 if (vc
->vc_npar
>= 1)
1403 vc
->vc_bell_pitch
= vc
->vc_par
[1];
1405 vc
->vc_bell_pitch
= DEFAULT_BELL_PITCH
;
1407 case 11: /* set bell duration in msec */
1408 if (vc
->vc_npar
>= 1)
1409 vc
->vc_bell_duration
= (vc
->vc_par
[1] < 2000) ?
1410 vc
->vc_par
[1] * HZ
/ 1000 : 0;
1412 vc
->vc_bell_duration
= DEFAULT_BELL_DURATION
;
1414 case 12: /* bring specified console to the front */
1415 if (vc
->vc_par
[1] >= 1 && vc_cons_allocated(vc
->vc_par
[1] - 1))
1416 set_console(vc
->vc_par
[1] - 1);
1418 case 13: /* unblank the screen */
1419 poke_blanked_console();
1421 case 14: /* set vesa powerdown interval */
1422 vesa_off_interval
= ((vc
->vc_par
[1] < 60) ? vc
->vc_par
[1] : 60) * 60 * HZ
;
1424 case 15: /* activate the previous console */
1425 set_console(last_console
);
1430 /* console_sem is held */
1431 static void csi_at(struct vc_data
*vc
, unsigned int nr
)
1433 if (nr
> vc
->vc_cols
- vc
->vc_x
)
1434 nr
= vc
->vc_cols
- vc
->vc_x
;
1437 insert_char(vc
, nr
);
1440 /* console_sem is held */
1441 static void csi_L(struct vc_data
*vc
, unsigned int nr
)
1443 if (nr
> vc
->vc_rows
- vc
->vc_y
)
1444 nr
= vc
->vc_rows
- vc
->vc_y
;
1447 scrdown(vc
, vc
->vc_y
, vc
->vc_bottom
, nr
);
1448 vc
->vc_need_wrap
= 0;
1451 /* console_sem is held */
1452 static void csi_P(struct vc_data
*vc
, unsigned int nr
)
1454 if (nr
> vc
->vc_cols
- vc
->vc_x
)
1455 nr
= vc
->vc_cols
- vc
->vc_x
;
1458 delete_char(vc
, nr
);
1461 /* console_sem is held */
1462 static void csi_M(struct vc_data
*vc
, unsigned int nr
)
1464 if (nr
> vc
->vc_rows
- vc
->vc_y
)
1465 nr
= vc
->vc_rows
- vc
->vc_y
;
1468 scrup(vc
, vc
->vc_y
, vc
->vc_bottom
, nr
);
1469 vc
->vc_need_wrap
= 0;
1472 /* console_sem is held (except via vc_init->reset_terminal */
1473 static void save_cur(struct vc_data
*vc
)
1475 vc
->vc_saved_x
= vc
->vc_x
;
1476 vc
->vc_saved_y
= vc
->vc_y
;
1477 vc
->vc_s_intensity
= vc
->vc_intensity
;
1478 vc
->vc_s_italic
= vc
->vc_italic
;
1479 vc
->vc_s_underline
= vc
->vc_underline
;
1480 vc
->vc_s_blink
= vc
->vc_blink
;
1481 vc
->vc_s_reverse
= vc
->vc_reverse
;
1482 vc
->vc_s_charset
= vc
->vc_charset
;
1483 vc
->vc_s_color
= vc
->vc_color
;
1484 vc
->vc_saved_G0
= vc
->vc_G0_charset
;
1485 vc
->vc_saved_G1
= vc
->vc_G1_charset
;
1488 /* console_sem is held */
1489 static void restore_cur(struct vc_data
*vc
)
1491 gotoxy(vc
, vc
->vc_saved_x
, vc
->vc_saved_y
);
1492 vc
->vc_intensity
= vc
->vc_s_intensity
;
1493 vc
->vc_italic
= vc
->vc_s_italic
;
1494 vc
->vc_underline
= vc
->vc_s_underline
;
1495 vc
->vc_blink
= vc
->vc_s_blink
;
1496 vc
->vc_reverse
= vc
->vc_s_reverse
;
1497 vc
->vc_charset
= vc
->vc_s_charset
;
1498 vc
->vc_color
= vc
->vc_s_color
;
1499 vc
->vc_G0_charset
= vc
->vc_saved_G0
;
1500 vc
->vc_G1_charset
= vc
->vc_saved_G1
;
1501 vc
->vc_translate
= set_translate(vc
->vc_charset
? vc
->vc_G1_charset
: vc
->vc_G0_charset
, vc
);
1503 vc
->vc_need_wrap
= 0;
1506 enum { ESnormal
, ESesc
, ESsquare
, ESgetpars
, ESgotpars
, ESfunckey
,
1507 EShash
, ESsetG0
, ESsetG1
, ESpercent
, ESignore
, ESnonstd
,
1510 /* console_sem is held (except via vc_init()) */
1511 static void reset_terminal(struct vc_data
*vc
, int do_clear
)
1514 vc
->vc_bottom
= vc
->vc_rows
;
1515 vc
->vc_state
= ESnormal
;
1517 vc
->vc_translate
= set_translate(LAT1_MAP
, vc
);
1518 vc
->vc_G0_charset
= LAT1_MAP
;
1519 vc
->vc_G1_charset
= GRAF_MAP
;
1521 vc
->vc_need_wrap
= 0;
1522 vc
->vc_report_mouse
= 0;
1523 vc
->vc_utf
= default_utf8
;
1524 vc
->vc_utf_count
= 0;
1526 vc
->vc_disp_ctrl
= 0;
1527 vc
->vc_toggle_meta
= 0;
1535 set_kbd(vc
, decarm
);
1536 clr_kbd(vc
, decckm
);
1537 clr_kbd(vc
, kbdapplic
);
1539 kbd_table
[vc
->vc_num
].lockstate
= 0;
1540 kbd_table
[vc
->vc_num
].slockstate
= 0;
1541 kbd_table
[vc
->vc_num
].ledmode
= LED_SHOW_FLAGS
;
1542 kbd_table
[vc
->vc_num
].ledflagstate
= kbd_table
[vc
->vc_num
].default_ledflagstate
;
1543 /* do not do set_leds here because this causes an endless tasklet loop
1544 when the keyboard hasn't been initialized yet */
1546 vc
->vc_cursor_type
= CUR_DEFAULT
;
1547 vc
->vc_complement_mask
= vc
->vc_s_complement_mask
;
1552 vc
->vc_tab_stop
[0] = 0x01010100;
1553 vc
->vc_tab_stop
[1] =
1554 vc
->vc_tab_stop
[2] =
1555 vc
->vc_tab_stop
[3] =
1556 vc
->vc_tab_stop
[4] = 0x01010101;
1558 vc
->vc_bell_pitch
= DEFAULT_BELL_PITCH
;
1559 vc
->vc_bell_duration
= DEFAULT_BELL_DURATION
;
1567 /* console_sem is held */
1568 static void do_con_trol(struct tty_struct
*tty
, struct vc_data
*vc
, int c
)
1571 * Control characters can be used in the _middle_
1572 * of an escape sequence.
1578 if (vc
->vc_bell_duration
)
1579 kd_mksound(vc
->vc_bell_pitch
, vc
->vc_bell_duration
);
1585 vc
->vc_pos
-= (vc
->vc_x
<< 1);
1586 while (vc
->vc_x
< vc
->vc_cols
- 1) {
1588 if (vc
->vc_tab_stop
[vc
->vc_x
>> 5] & (1 << (vc
->vc_x
& 31)))
1591 vc
->vc_pos
+= (vc
->vc_x
<< 1);
1593 case 10: case 11: case 12:
1595 if (!is_kbd(vc
, lnm
))
1602 vc
->vc_translate
= set_translate(vc
->vc_G1_charset
, vc
);
1603 vc
->vc_disp_ctrl
= 1;
1607 vc
->vc_translate
= set_translate(vc
->vc_G0_charset
, vc
);
1608 vc
->vc_disp_ctrl
= 0;
1611 vc
->vc_state
= ESnormal
;
1614 vc
->vc_state
= ESesc
;
1620 vc
->vc_state
= ESsquare
;
1623 switch(vc
->vc_state
) {
1625 vc
->vc_state
= ESnormal
;
1628 vc
->vc_state
= ESsquare
;
1631 vc
->vc_state
= ESnonstd
;
1634 vc
->vc_state
= ESpercent
;
1647 vc
->vc_tab_stop
[vc
->vc_x
>> 5] |= (1 << (vc
->vc_x
& 31));
1659 vc
->vc_state
= ESsetG0
;
1662 vc
->vc_state
= ESsetG1
;
1665 vc
->vc_state
= EShash
;
1668 reset_terminal(vc
, 1);
1670 case '>': /* Numeric keypad */
1671 clr_kbd(vc
, kbdapplic
);
1673 case '=': /* Appl. keypad */
1674 set_kbd(vc
, kbdapplic
);
1679 if (c
=='P') { /* palette escape sequence */
1680 for (vc
->vc_npar
= 0; vc
->vc_npar
< NPAR
; vc
->vc_npar
++)
1681 vc
->vc_par
[vc
->vc_npar
] = 0;
1683 vc
->vc_state
= ESpalette
;
1685 } else if (c
=='R') { /* reset palette */
1687 vc
->vc_state
= ESnormal
;
1689 vc
->vc_state
= ESnormal
;
1692 if ( (c
>='0'&&c
<='9') || (c
>='A'&&c
<='F') || (c
>='a'&&c
<='f') ) {
1693 vc
->vc_par
[vc
->vc_npar
++] = (c
> '9' ? (c
& 0xDF) - 'A' + 10 : c
- '0');
1694 if (vc
->vc_npar
== 7) {
1695 int i
= vc
->vc_par
[0] * 3, j
= 1;
1696 vc
->vc_palette
[i
] = 16 * vc
->vc_par
[j
++];
1697 vc
->vc_palette
[i
++] += vc
->vc_par
[j
++];
1698 vc
->vc_palette
[i
] = 16 * vc
->vc_par
[j
++];
1699 vc
->vc_palette
[i
++] += vc
->vc_par
[j
++];
1700 vc
->vc_palette
[i
] = 16 * vc
->vc_par
[j
++];
1701 vc
->vc_palette
[i
] += vc
->vc_par
[j
];
1703 vc
->vc_state
= ESnormal
;
1706 vc
->vc_state
= ESnormal
;
1709 for (vc
->vc_npar
= 0; vc
->vc_npar
< NPAR
; vc
->vc_npar
++)
1710 vc
->vc_par
[vc
->vc_npar
] = 0;
1712 vc
->vc_state
= ESgetpars
;
1713 if (c
== '[') { /* Function key */
1714 vc
->vc_state
=ESfunckey
;
1717 vc
->vc_ques
= (c
== '?');
1721 if (c
== ';' && vc
->vc_npar
< NPAR
- 1) {
1724 } else if (c
>='0' && c
<='9') {
1725 vc
->vc_par
[vc
->vc_npar
] *= 10;
1726 vc
->vc_par
[vc
->vc_npar
] += c
- '0';
1729 vc
->vc_state
= ESgotpars
;
1731 vc
->vc_state
= ESnormal
;
1742 vc
->vc_cursor_type
= vc
->vc_par
[0] | (vc
->vc_par
[1] << 8) | (vc
->vc_par
[2] << 16);
1744 vc
->vc_cursor_type
= CUR_DEFAULT
;
1752 vc
->vc_complement_mask
= vc
->vc_par
[0] << 8 | vc
->vc_par
[1];
1754 vc
->vc_complement_mask
= vc
->vc_s_complement_mask
;
1760 if (vc
->vc_par
[0] == 5)
1762 else if (vc
->vc_par
[0] == 6)
1763 cursor_report(vc
, tty
);
1775 gotoxy(vc
, vc
->vc_par
[0], vc
->vc_y
);
1780 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
- vc
->vc_par
[0]);
1785 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
+ vc
->vc_par
[0]);
1790 gotoxy(vc
, vc
->vc_x
+ vc
->vc_par
[0], vc
->vc_y
);
1795 gotoxy(vc
, vc
->vc_x
- vc
->vc_par
[0], vc
->vc_y
);
1800 gotoxy(vc
, 0, vc
->vc_y
+ vc
->vc_par
[0]);
1805 gotoxy(vc
, 0, vc
->vc_y
- vc
->vc_par
[0]);
1810 gotoxay(vc
, vc
->vc_x
,vc
->vc_par
[0]);
1817 gotoxay(vc
, vc
->vc_par
[1], vc
->vc_par
[0]);
1820 csi_J(vc
, vc
->vc_par
[0]);
1823 csi_K(vc
, vc
->vc_par
[0]);
1826 csi_L(vc
, vc
->vc_par
[0]);
1829 csi_M(vc
, vc
->vc_par
[0]);
1832 csi_P(vc
, vc
->vc_par
[0]);
1840 vc
->vc_tab_stop
[vc
->vc_x
>> 5] &= ~(1 << (vc
->vc_x
& 31));
1841 else if (vc
->vc_par
[0] == 3) {
1842 vc
->vc_tab_stop
[0] =
1843 vc
->vc_tab_stop
[1] =
1844 vc
->vc_tab_stop
[2] =
1845 vc
->vc_tab_stop
[3] =
1846 vc
->vc_tab_stop
[4] = 0;
1852 case 'q': /* DECLL - but only 3 leds */
1853 /* map 0,1,2,3 to 0,1,2,4 */
1854 if (vc
->vc_par
[0] < 4)
1855 setledstate(kbd_table
+ vc
->vc_num
,
1856 (vc
->vc_par
[0] < 3) ? vc
->vc_par
[0] : 4);
1862 vc
->vc_par
[1] = vc
->vc_rows
;
1863 /* Minimum allowed region is 2 lines */
1864 if (vc
->vc_par
[0] < vc
->vc_par
[1] &&
1865 vc
->vc_par
[1] <= vc
->vc_rows
) {
1866 vc
->vc_top
= vc
->vc_par
[0] - 1;
1867 vc
->vc_bottom
= vc
->vc_par
[1];
1878 csi_X(vc
, vc
->vc_par
[0]);
1881 csi_at(vc
, vc
->vc_par
[0]);
1883 case ']': /* setterm functions */
1884 setterm_command(vc
);
1889 vc
->vc_state
= ESnormal
;
1891 case '@': /* defined in ISO 2022 */
1894 case 'G': /* prelim official escape code */
1895 case '8': /* retained for compatibility */
1901 vc
->vc_state
= ESnormal
;
1904 vc
->vc_state
= ESnormal
;
1906 /* DEC screen alignment test. kludge :-) */
1907 vc
->vc_video_erase_char
=
1908 (vc
->vc_video_erase_char
& 0xff00) | 'E';
1910 vc
->vc_video_erase_char
=
1911 (vc
->vc_video_erase_char
& 0xff00) | ' ';
1912 do_update_region(vc
, vc
->vc_origin
, vc
->vc_screenbuf_size
/ 2);
1917 vc
->vc_G0_charset
= GRAF_MAP
;
1919 vc
->vc_G0_charset
= LAT1_MAP
;
1921 vc
->vc_G0_charset
= IBMPC_MAP
;
1923 vc
->vc_G0_charset
= USER_MAP
;
1924 if (vc
->vc_charset
== 0)
1925 vc
->vc_translate
= set_translate(vc
->vc_G0_charset
, vc
);
1926 vc
->vc_state
= ESnormal
;
1930 vc
->vc_G1_charset
= GRAF_MAP
;
1932 vc
->vc_G1_charset
= LAT1_MAP
;
1934 vc
->vc_G1_charset
= IBMPC_MAP
;
1936 vc
->vc_G1_charset
= USER_MAP
;
1937 if (vc
->vc_charset
== 1)
1938 vc
->vc_translate
= set_translate(vc
->vc_G1_charset
, vc
);
1939 vc
->vc_state
= ESnormal
;
1942 vc
->vc_state
= ESnormal
;
1946 /* This is a temporary buffer used to prepare a tty console write
1947 * so that we can easily avoid touching user space while holding the
1948 * console spinlock. It is allocated in con_init and is shared by
1949 * this code and the vc_screen read/write tty calls.
1951 * We have to allocate this statically in the kernel data section
1952 * since console_init (and thus con_init) are called before any
1953 * kernel memory allocation is available.
1955 char con_buf
[CON_BUF_SIZE
];
1956 DEFINE_MUTEX(con_buf_mtx
);
1958 /* is_double_width() is based on the wcwidth() implementation by
1959 * Markus Kuhn -- 2007-05-26 (Unicode 5.0)
1960 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
1967 static int bisearch(uint32_t ucs
, const struct interval
*table
, int max
)
1972 if (ucs
< table
[0].first
|| ucs
> table
[max
].last
)
1974 while (max
>= min
) {
1975 mid
= (min
+ max
) / 2;
1976 if (ucs
> table
[mid
].last
)
1978 else if (ucs
< table
[mid
].first
)
1986 static int is_double_width(uint32_t ucs
)
1988 static const struct interval double_width
[] = {
1989 { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E },
1990 { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF },
1991 { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 },
1992 { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD }
1994 return bisearch(ucs
, double_width
,
1995 sizeof(double_width
) / sizeof(*double_width
) - 1);
1998 /* acquires console_sem */
1999 static int do_con_write(struct tty_struct
*tty
, const unsigned char *buf
, int count
)
2001 #ifdef VT_BUF_VRAM_ONLY
2002 #define FLUSH do { } while(0);
2004 #define FLUSH if (draw_x >= 0) { \
2005 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
2010 int c
, tc
, ok
, n
= 0, draw_x
= -1;
2011 unsigned int currcons
;
2012 unsigned long draw_from
= 0, draw_to
= 0;
2014 unsigned char vc_attr
;
2018 u16 himask
, charmask
;
2019 const unsigned char *orig_buf
= NULL
;
2027 acquire_console_sem();
2028 vc
= tty
->driver_data
;
2030 printk(KERN_ERR
"vt: argh, driver_data is NULL !\n");
2031 release_console_sem();
2035 currcons
= vc
->vc_num
;
2036 if (!vc_cons_allocated(currcons
)) {
2037 /* could this happen? */
2038 static int error
= 0;
2041 printk("con_write: tty %d not allocated\n", currcons
+1);
2043 release_console_sem();
2046 release_console_sem();
2051 /* At this point 'buf' is guaranteed to be a kernel buffer
2052 * and therefore no access to userspace (and therefore sleeping)
2053 * will be needed. The con_buf_mtx serializes all tty based
2054 * console rendering and vcs write/read operations. We hold
2055 * the console spinlock during the entire write.
2058 acquire_console_sem();
2060 vc
= tty
->driver_data
;
2062 printk(KERN_ERR
"vt: argh, driver_data _became_ NULL !\n");
2063 release_console_sem();
2067 himask
= vc
->vc_hi_font_mask
;
2068 charmask
= himask
? 0x1ff : 0xff;
2070 /* undraw cursor first */
2074 while (!tty
->stopped
&& count
) {
2084 /* Do no translation at all in control states */
2085 if (vc
->vc_state
!= ESnormal
) {
2087 } else if (vc
->vc_utf
&& !vc
->vc_disp_ctrl
) {
2088 /* Combine UTF-8 into Unicode in vc_utf_char.
2089 * vc_utf_count is the number of continuation bytes still
2090 * expected to arrive.
2091 * vc_npar is the number of continuation bytes arrived so
2095 if ((c
& 0xc0) == 0x80) {
2096 /* Continuation byte received */
2097 static const uint32_t utf8_length_changes
[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff };
2098 if (vc
->vc_utf_count
) {
2099 vc
->vc_utf_char
= (vc
->vc_utf_char
<< 6) | (c
& 0x3f);
2101 if (--vc
->vc_utf_count
) {
2102 /* Still need some bytes */
2105 /* Got a whole character */
2106 c
= vc
->vc_utf_char
;
2107 /* Reject overlong sequences */
2108 if (c
<= utf8_length_changes
[vc
->vc_npar
- 1] ||
2109 c
> utf8_length_changes
[vc
->vc_npar
])
2112 /* Unexpected continuation byte */
2113 vc
->vc_utf_count
= 0;
2117 /* Single ASCII byte or first byte of a sequence received */
2118 if (vc
->vc_utf_count
) {
2119 /* Continuation byte expected */
2121 vc
->vc_utf_count
= 0;
2123 } else if (c
> 0x7f) {
2124 /* First byte of a multibyte sequence received */
2126 if ((c
& 0xe0) == 0xc0) {
2127 vc
->vc_utf_count
= 1;
2128 vc
->vc_utf_char
= (c
& 0x1f);
2129 } else if ((c
& 0xf0) == 0xe0) {
2130 vc
->vc_utf_count
= 2;
2131 vc
->vc_utf_char
= (c
& 0x0f);
2132 } else if ((c
& 0xf8) == 0xf0) {
2133 vc
->vc_utf_count
= 3;
2134 vc
->vc_utf_char
= (c
& 0x07);
2135 } else if ((c
& 0xfc) == 0xf8) {
2136 vc
->vc_utf_count
= 4;
2137 vc
->vc_utf_char
= (c
& 0x03);
2138 } else if ((c
& 0xfe) == 0xfc) {
2139 vc
->vc_utf_count
= 5;
2140 vc
->vc_utf_char
= (c
& 0x01);
2142 /* 254 and 255 are invalid */
2145 if (vc
->vc_utf_count
) {
2146 /* Still need some bytes */
2150 /* Nothing to do if an ASCII byte was received */
2152 /* End of UTF-8 decoding. */
2153 /* c is the received character, or U+FFFD for invalid sequences. */
2154 /* Replace invalid Unicode code points with U+FFFD too */
2155 if ((c
>= 0xd800 && c
<= 0xdfff) || c
== 0xfffe || c
== 0xffff)
2158 } else { /* no utf or alternate charset mode */
2159 tc
= vc
->vc_translate
[vc
->vc_toggle_meta
? (c
| 0x80) : c
];
2162 /* If the original code was a control character we
2163 * only allow a glyph to be displayed if the code is
2164 * not normally used (such as for cursor movement) or
2165 * if the disp_ctrl mode has been explicitly enabled.
2166 * Certain characters (as given by the CTRL_ALWAYS
2167 * bitmap) are always displayed as control characters,
2168 * as the console would be pretty useless without
2169 * them; to display an arbitrary font position use the
2170 * direct-to-font zone in UTF-8 mode.
2172 ok
= tc
&& (c
>= 32 ||
2173 !(vc
->vc_disp_ctrl
? (CTRL_ALWAYS
>> c
) & 1 :
2174 vc
->vc_utf
|| ((CTRL_ACTION
>> c
) & 1)))
2175 && (c
!= 127 || vc
->vc_disp_ctrl
)
2178 if (vc
->vc_state
== ESnormal
&& ok
) {
2179 if (vc
->vc_utf
&& !vc
->vc_disp_ctrl
) {
2180 if (is_double_width(c
))
2183 /* Now try to find out how to display it */
2184 tc
= conv_uni_to_pc(vc
, tc
);
2185 if (tc
& ~charmask
) {
2186 if (tc
== -1 || tc
== -2) {
2187 continue; /* nothing to display */
2189 /* Glyph not found */
2190 if ((!(vc
->vc_utf
&& !vc
->vc_disp_ctrl
) || c
< 128) && !(c
& ~charmask
)) {
2191 /* In legacy mode use the glyph we get by a 1:1 mapping.
2192 This would make absolutely no sense with Unicode in mind,
2193 but do this for ASCII characters since a font may lack
2194 Unicode mapping info and we don't want to end up with
2195 having question marks only. */
2198 /* Display U+FFFD. If it's not found, display an inverse question mark. */
2199 tc
= conv_uni_to_pc(vc
, 0xfffd);
2202 tc
= conv_uni_to_pc(vc
, '?');
2203 if (tc
< 0) tc
= '?';
2209 vc_attr
= vc
->vc_attr
;
2211 /* invert vc_attr */
2212 if (!vc
->vc_can_do_color
) {
2213 vc_attr
= (vc
->vc_attr
) ^ 0x08;
2214 } else if (vc
->vc_hi_font_mask
== 0x100) {
2215 vc_attr
= ((vc
->vc_attr
) & 0x11) | (((vc
->vc_attr
) & 0xe0) >> 4) | (((vc
->vc_attr
) & 0x0e) << 4);
2217 vc_attr
= ((vc
->vc_attr
) & 0x88) | (((vc
->vc_attr
) & 0x70) >> 4) | (((vc
->vc_attr
) & 0x07) << 4);
2223 if (vc
->vc_need_wrap
|| vc
->vc_decim
)
2225 if (vc
->vc_need_wrap
) {
2232 ((vc_attr
<< 8) & ~himask
) + ((tc
& 0x100) ? himask
: 0) + (tc
& 0xff) :
2233 (vc_attr
<< 8) + tc
,
2234 (u16
*) vc
->vc_pos
);
2235 if (DO_UPDATE(vc
) && draw_x
< 0) {
2237 draw_from
= vc
->vc_pos
;
2239 if (vc
->vc_x
== vc
->vc_cols
- 1) {
2240 vc
->vc_need_wrap
= vc
->vc_decawm
;
2241 draw_to
= vc
->vc_pos
+ 2;
2244 draw_to
= (vc
->vc_pos
+= 2);
2247 if (!--width
) break;
2249 tc
= conv_uni_to_pc(vc
, ' '); /* A space is printed in the second column */
2250 if (tc
< 0) tc
= ' ';
2262 goto rescan_last_byte
;
2267 do_con_trol(tty
, vc
, orig
);
2270 console_conditional_schedule();
2271 release_console_sem();
2279 * This is the console switching callback.
2281 * Doing console switching in a process context allows
2282 * us to do the switches asynchronously (needed when we want
2283 * to switch due to a keyboard interrupt). Synchronization
2284 * with other console code and prevention of re-entrancy is
2285 * ensured with console_sem.
2287 static void console_callback(struct work_struct
*ignored
)
2289 acquire_console_sem();
2291 if (want_console
>= 0) {
2292 if (want_console
!= fg_console
&&
2293 vc_cons_allocated(want_console
)) {
2294 hide_cursor(vc_cons
[fg_console
].d
);
2295 change_console(vc_cons
[want_console
].d
);
2296 /* we only changed when the console had already
2297 been allocated - a new console is not created
2298 in an interrupt routine */
2302 if (do_poke_blanked_console
) { /* do not unblank for a LED change */
2303 do_poke_blanked_console
= 0;
2304 poke_blanked_console();
2306 if (scrollback_delta
) {
2307 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
2309 if (vc
->vc_mode
== KD_TEXT
)
2310 vc
->vc_sw
->con_scrolldelta(vc
, scrollback_delta
);
2311 scrollback_delta
= 0;
2313 if (blank_timer_expired
) {
2315 blank_timer_expired
= 0;
2318 release_console_sem();
2321 int set_console(int nr
)
2323 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
2325 if (!vc_cons_allocated(nr
) || vt_dont_switch
||
2326 (vc
->vt_mode
.mode
== VT_AUTO
&& vc
->vc_mode
== KD_GRAPHICS
)) {
2329 * Console switch will fail in console_callback() or
2330 * change_console() so there is no point scheduling
2333 * Existing set_console() users don't check the return
2334 * value so this shouldn't break anything
2340 schedule_console_callback();
2345 struct tty_driver
*console_driver
;
2347 #ifdef CONFIG_VT_CONSOLE
2350 * Console on virtual terminal
2352 * The console must be locked when we get here.
2355 static void vt_console_print(struct console
*co
, const char *b
, unsigned count
)
2357 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
2359 static unsigned long printing
;
2360 const ushort
*start
;
2364 /* console busy or not yet initialized */
2365 if (!printable
|| test_and_set_bit(0, &printing
))
2368 if (kmsg_redirect
&& vc_cons_allocated(kmsg_redirect
- 1))
2369 vc
= vc_cons
[kmsg_redirect
- 1].d
;
2371 /* read `x' only after setting currcons properly (otherwise
2372 the `x' macro will read the x of the foreground console). */
2375 if (!vc_cons_allocated(fg_console
)) {
2377 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2381 if (vc
->vc_mode
!= KD_TEXT
)
2384 /* undraw cursor first */
2388 start
= (ushort
*)vc
->vc_pos
;
2390 /* Contrived structure to try to emulate original need_wrap behaviour
2391 * Problems caused when we have need_wrap set on '\n' character */
2394 if (c
== 10 || c
== 13 || c
== 8 || vc
->vc_need_wrap
) {
2396 if (CON_IS_VISIBLE(vc
))
2397 vc
->vc_sw
->con_putcs(vc
, start
, cnt
, vc
->vc_y
, vc
->vc_x
);
2399 if (vc
->vc_need_wrap
)
2403 if (c
== 8) { /* backspace */
2405 start
= (ushort
*)vc
->vc_pos
;
2412 start
= (ushort
*)vc
->vc_pos
;
2414 if (c
== 10 || c
== 13)
2417 scr_writew((vc
->vc_attr
<< 8) + c
, (unsigned short *)vc
->vc_pos
);
2419 if (myx
== vc
->vc_cols
- 1) {
2420 vc
->vc_need_wrap
= 1;
2427 if (CON_IS_VISIBLE(vc
))
2428 vc
->vc_sw
->con_putcs(vc
, start
, cnt
, vc
->vc_y
, vc
->vc_x
);
2430 if (vc
->vc_x
== vc
->vc_cols
) {
2432 vc
->vc_need_wrap
= 1;
2438 clear_bit(0, &printing
);
2441 static struct tty_driver
*vt_console_device(struct console
*c
, int *index
)
2443 *index
= c
->index
? c
->index
-1 : fg_console
;
2444 return console_driver
;
2447 static struct console vt_console_driver
= {
2449 .write
= vt_console_print
,
2450 .device
= vt_console_device
,
2451 .unblank
= unblank_screen
,
2452 .flags
= CON_PRINTBUFFER
,
2458 * Handling of Linux-specific VC ioctls
2462 * Generally a bit racy with respect to console_sem().
2464 * There are some functions which don't need it.
2466 * There are some functions which can sleep for arbitrary periods
2467 * (paste_selection) but we don't need the lock there anyway.
2469 * set_selection has locking, and definitely needs it
2472 int tioclinux(struct tty_struct
*tty
, unsigned long arg
)
2475 char __user
*p
= (char __user
*)arg
;
2479 if (tty
->driver
->type
!= TTY_DRIVER_TYPE_CONSOLE
)
2481 if (current
->signal
->tty
!= tty
&& !capable(CAP_SYS_ADMIN
))
2483 if (get_user(type
, p
))
2489 acquire_console_sem();
2490 ret
= set_selection((struct tiocl_selection __user
*)(p
+1), tty
);
2491 release_console_sem();
2493 case TIOCL_PASTESEL
:
2494 ret
= paste_selection(tty
);
2496 case TIOCL_UNBLANKSCREEN
:
2497 acquire_console_sem();
2499 release_console_sem();
2501 case TIOCL_SELLOADLUT
:
2502 ret
= sel_loadlut(p
);
2504 case TIOCL_GETSHIFTSTATE
:
2507 * Make it possible to react to Shift+Mousebutton.
2508 * Note that 'shift_state' is an undocumented
2509 * kernel-internal variable; programs not closely
2510 * related to the kernel should not use this.
2513 ret
= __put_user(data
, p
);
2515 case TIOCL_GETMOUSEREPORTING
:
2516 data
= mouse_reporting();
2517 ret
= __put_user(data
, p
);
2519 case TIOCL_SETVESABLANK
:
2520 ret
= set_vesa_blanking(p
);
2522 case TIOCL_GETKMSGREDIRECT
:
2523 data
= kmsg_redirect
;
2524 ret
= __put_user(data
, p
);
2526 case TIOCL_SETKMSGREDIRECT
:
2527 if (!capable(CAP_SYS_ADMIN
)) {
2530 if (get_user(data
, p
+1))
2533 kmsg_redirect
= data
;
2536 case TIOCL_GETFGCONSOLE
:
2539 case TIOCL_SCROLLCONSOLE
:
2540 if (get_user(lines
, (s32 __user
*)(p
+4))) {
2543 scrollfront(vc_cons
[fg_console
].d
, lines
);
2547 case TIOCL_BLANKSCREEN
: /* until explicitly unblanked, not only poked */
2548 acquire_console_sem();
2551 release_console_sem();
2553 case TIOCL_BLANKEDSCREEN
:
2554 ret
= console_blanked
;
2564 * /dev/ttyN handling
2567 static int con_write(struct tty_struct
*tty
, const unsigned char *buf
, int count
)
2571 retval
= do_con_write(tty
, buf
, count
);
2572 con_flush_chars(tty
);
2577 static void con_put_char(struct tty_struct
*tty
, unsigned char ch
)
2580 return; /* n_r3964 calls put_char() from interrupt context */
2581 do_con_write(tty
, &ch
, 1);
2584 static int con_write_room(struct tty_struct
*tty
)
2588 return 4096; /* No limit, really; we're not buffering */
2591 static int con_chars_in_buffer(struct tty_struct
*tty
)
2593 return 0; /* we're not buffering */
2597 * con_throttle and con_unthrottle are only used for
2598 * paste_selection(), which has to stuff in a large number of
2601 static void con_throttle(struct tty_struct
*tty
)
2605 static void con_unthrottle(struct tty_struct
*tty
)
2607 struct vc_data
*vc
= tty
->driver_data
;
2609 wake_up_interruptible(&vc
->paste_wait
);
2613 * Turn the Scroll-Lock LED on when the tty is stopped
2615 static void con_stop(struct tty_struct
*tty
)
2620 console_num
= tty
->index
;
2621 if (!vc_cons_allocated(console_num
))
2623 set_vc_kbd_led(kbd_table
+ console_num
, VC_SCROLLOCK
);
2628 * Turn the Scroll-Lock LED off when the console is started
2630 static void con_start(struct tty_struct
*tty
)
2635 console_num
= tty
->index
;
2636 if (!vc_cons_allocated(console_num
))
2638 clr_vc_kbd_led(kbd_table
+ console_num
, VC_SCROLLOCK
);
2642 static void con_flush_chars(struct tty_struct
*tty
)
2646 if (in_interrupt()) /* from flush_to_ldisc */
2649 /* if we race with con_close(), vt may be null */
2650 acquire_console_sem();
2651 vc
= tty
->driver_data
;
2654 release_console_sem();
2658 * Allocate the console screen memory.
2660 static int con_open(struct tty_struct
*tty
, struct file
*filp
)
2662 unsigned int currcons
= tty
->index
;
2665 acquire_console_sem();
2666 if (tty
->driver_data
== NULL
) {
2667 ret
= vc_allocate(currcons
);
2669 struct vc_data
*vc
= vc_cons
[currcons
].d
;
2670 tty
->driver_data
= vc
;
2673 if (!tty
->winsize
.ws_row
&& !tty
->winsize
.ws_col
) {
2674 tty
->winsize
.ws_row
= vc_cons
[currcons
].d
->vc_rows
;
2675 tty
->winsize
.ws_col
= vc_cons
[currcons
].d
->vc_cols
;
2677 release_console_sem();
2678 vcs_make_sysfs(tty
);
2682 release_console_sem();
2687 * We take tty_mutex in here to prevent another thread from coming in via init_dev
2688 * and taking a ref against the tty while we're in the process of forgetting
2689 * about it and cleaning things up.
2691 * This is because vcs_remove_sysfs() can sleep and will drop the BKL.
2693 static void con_close(struct tty_struct
*tty
, struct file
*filp
)
2695 mutex_lock(&tty_mutex
);
2696 acquire_console_sem();
2697 if (tty
&& tty
->count
== 1) {
2698 struct vc_data
*vc
= tty
->driver_data
;
2702 tty
->driver_data
= NULL
;
2703 release_console_sem();
2704 vcs_remove_sysfs(tty
);
2705 mutex_unlock(&tty_mutex
);
2707 * tty_mutex is released, but we still hold BKL, so there is
2708 * still exclusion against init_dev()
2712 release_console_sem();
2713 mutex_unlock(&tty_mutex
);
2716 static int default_italic_color
= 2; // green (ASCII)
2717 static int default_underline_color
= 3; // cyan (ASCII)
2718 module_param_named(italic
, default_italic_color
, int, S_IRUGO
| S_IWUSR
);
2719 module_param_named(underline
, default_underline_color
, int, S_IRUGO
| S_IWUSR
);
2721 static void vc_init(struct vc_data
*vc
, unsigned int rows
,
2722 unsigned int cols
, int do_clear
)
2728 vc
->vc_size_row
= cols
<< 1;
2729 vc
->vc_screenbuf_size
= vc
->vc_rows
* vc
->vc_size_row
;
2732 vc
->vc_pos
= vc
->vc_origin
;
2734 for (j
=k
=0; j
<16; j
++) {
2735 vc
->vc_palette
[k
++] = default_red
[j
] ;
2736 vc
->vc_palette
[k
++] = default_grn
[j
] ;
2737 vc
->vc_palette
[k
++] = default_blu
[j
] ;
2739 vc
->vc_def_color
= 0x07; /* white */
2740 vc
->vc_ulcolor
= default_underline_color
;
2741 vc
->vc_itcolor
= default_italic_color
;
2742 vc
->vc_halfcolor
= 0x08; /* grey */
2743 init_waitqueue_head(&vc
->paste_wait
);
2744 reset_terminal(vc
, do_clear
);
2748 * This routine initializes console interrupts, and does nothing
2749 * else. If you want the screen to clear, call tty_write with
2750 * the appropriate escape-sequence.
2753 static int __init
con_init(void)
2755 const char *display_desc
= NULL
;
2757 unsigned int currcons
= 0, i
;
2759 acquire_console_sem();
2762 display_desc
= conswitchp
->con_startup();
2763 if (!display_desc
) {
2765 release_console_sem();
2769 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
2770 struct con_driver
*con_driver
= ®istered_con_driver
[i
];
2772 if (con_driver
->con
== NULL
) {
2773 con_driver
->con
= conswitchp
;
2774 con_driver
->desc
= display_desc
;
2775 con_driver
->flag
= CON_DRIVER_FLAG_INIT
;
2776 con_driver
->first
= 0;
2777 con_driver
->last
= MAX_NR_CONSOLES
- 1;
2782 for (i
= 0; i
< MAX_NR_CONSOLES
; i
++)
2783 con_driver_map
[i
] = conswitchp
;
2785 if (blankinterval
) {
2786 blank_state
= blank_normal_wait
;
2787 mod_timer(&console_timer
, jiffies
+ blankinterval
);
2791 * kmalloc is not running yet - we use the bootmem allocator.
2793 for (currcons
= 0; currcons
< MIN_NR_CONSOLES
; currcons
++) {
2794 vc_cons
[currcons
].d
= vc
= alloc_bootmem(sizeof(struct vc_data
));
2795 INIT_WORK(&vc_cons
[currcons
].SAK_work
, vc_SAK
);
2796 visual_init(vc
, currcons
, 1);
2797 vc
->vc_screenbuf
= (unsigned short *)alloc_bootmem(vc
->vc_screenbuf_size
);
2798 vc
->vc_kmalloced
= 0;
2799 vc_init(vc
, vc
->vc_rows
, vc
->vc_cols
,
2800 currcons
|| !vc
->vc_sw
->con_save_screen
);
2802 currcons
= fg_console
= 0;
2803 master_display_fg
= vc
= vc_cons
[currcons
].d
;
2806 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
);
2809 printk("Console: %s %s %dx%d",
2810 vc
->vc_can_do_color
? "colour" : "mono",
2811 display_desc
, vc
->vc_cols
, vc
->vc_rows
);
2815 release_console_sem();
2817 #ifdef CONFIG_VT_CONSOLE
2818 register_console(&vt_console_driver
);
2822 console_initcall(con_init
);
2824 static const struct tty_operations con_ops
= {
2828 .write_room
= con_write_room
,
2829 .put_char
= con_put_char
,
2830 .flush_chars
= con_flush_chars
,
2831 .chars_in_buffer
= con_chars_in_buffer
,
2835 .throttle
= con_throttle
,
2836 .unthrottle
= con_unthrottle
,
2839 int __init
vty_init(void)
2843 console_driver
= alloc_tty_driver(MAX_NR_CONSOLES
);
2844 if (!console_driver
)
2845 panic("Couldn't allocate console driver\n");
2846 console_driver
->owner
= THIS_MODULE
;
2847 console_driver
->name
= "tty";
2848 console_driver
->name_base
= 1;
2849 console_driver
->major
= TTY_MAJOR
;
2850 console_driver
->minor_start
= 1;
2851 console_driver
->type
= TTY_DRIVER_TYPE_CONSOLE
;
2852 console_driver
->init_termios
= tty_std_termios
;
2853 console_driver
->flags
= TTY_DRIVER_REAL_RAW
| TTY_DRIVER_RESET_TERMIOS
;
2854 tty_set_operations(console_driver
, &con_ops
);
2855 if (tty_register_driver(console_driver
))
2856 panic("Couldn't register console driver\n");
2860 #ifdef CONFIG_PROM_CONSOLE
2863 #ifdef CONFIG_MDA_CONSOLE
2869 #ifndef VT_SINGLE_DRIVER
2870 #include <linux/device.h>
2872 static struct class *vtconsole_class
;
2874 static int bind_con_driver(const struct consw
*csw
, int first
, int last
,
2877 struct module
*owner
= csw
->owner
;
2878 const char *desc
= NULL
;
2879 struct con_driver
*con_driver
;
2880 int i
, j
= -1, k
= -1, retval
= -ENODEV
;
2882 if (!try_module_get(owner
))
2885 acquire_console_sem();
2887 /* check if driver is registered */
2888 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
2889 con_driver
= ®istered_con_driver
[i
];
2891 if (con_driver
->con
== csw
) {
2892 desc
= con_driver
->desc
;
2901 if (!(con_driver
->flag
& CON_DRIVER_FLAG_INIT
)) {
2903 con_driver
->flag
|= CON_DRIVER_FLAG_INIT
;
2908 module_put(conswitchp
->owner
);
2910 __module_get(owner
);
2914 first
= max(first
, con_driver
->first
);
2915 last
= min(last
, con_driver
->last
);
2917 for (i
= first
; i
<= last
; i
++) {
2919 struct vc_data
*vc
= vc_cons
[i
].d
;
2921 if (con_driver_map
[i
])
2922 module_put(con_driver_map
[i
]->owner
);
2923 __module_get(owner
);
2924 con_driver_map
[i
] = csw
;
2926 if (!vc
|| !vc
->vc_sw
)
2931 if (CON_IS_VISIBLE(vc
)) {
2936 old_was_color
= vc
->vc_can_do_color
;
2937 vc
->vc_sw
->con_deinit(vc
);
2938 vc
->vc_origin
= (unsigned long)vc
->vc_screenbuf
;
2939 visual_init(vc
, i
, 0);
2943 /* If the console changed between mono <-> color, then
2944 * the attributes in the screenbuf will be wrong. The
2945 * following resets all attributes to something sane.
2947 if (old_was_color
!= vc
->vc_can_do_color
)
2948 clear_buffer_attributes(vc
);
2951 printk("Console: switching ");
2953 printk("consoles %d-%d ", first
+1, last
+1);
2955 struct vc_data
*vc
= vc_cons
[j
].d
;
2957 printk("to %s %s %dx%d\n",
2958 vc
->vc_can_do_color
? "colour" : "mono",
2959 desc
, vc
->vc_cols
, vc
->vc_rows
);
2966 printk("to %s\n", desc
);
2970 release_console_sem();
2975 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
2976 static int con_is_graphics(const struct consw
*csw
, int first
, int last
)
2980 for (i
= first
; i
<= last
; i
++) {
2981 struct vc_data
*vc
= vc_cons
[i
].d
;
2983 if (vc
&& vc
->vc_mode
== KD_GRAPHICS
) {
2992 static int unbind_con_driver(const struct consw
*csw
, int first
, int last
,
2995 struct module
*owner
= csw
->owner
;
2996 const struct consw
*defcsw
= NULL
;
2997 struct con_driver
*con_driver
= NULL
, *con_back
= NULL
;
2998 int i
, retval
= -ENODEV
;
3000 if (!try_module_get(owner
))
3003 acquire_console_sem();
3005 /* check if driver is registered and if it is unbindable */
3006 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3007 con_driver
= ®istered_con_driver
[i
];
3009 if (con_driver
->con
== csw
&&
3010 con_driver
->flag
& CON_DRIVER_FLAG_MODULE
) {
3017 release_console_sem();
3023 /* check if backup driver exists */
3024 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3025 con_back
= ®istered_con_driver
[i
];
3027 if (con_back
->con
&&
3028 !(con_back
->flag
& CON_DRIVER_FLAG_MODULE
)) {
3029 defcsw
= con_back
->con
;
3036 release_console_sem();
3040 if (!con_is_bound(csw
)) {
3041 release_console_sem();
3045 first
= max(first
, con_driver
->first
);
3046 last
= min(last
, con_driver
->last
);
3048 for (i
= first
; i
<= last
; i
++) {
3049 if (con_driver_map
[i
] == csw
) {
3050 module_put(csw
->owner
);
3051 con_driver_map
[i
] = NULL
;
3055 if (!con_is_bound(defcsw
)) {
3056 const struct consw
*defconsw
= conswitchp
;
3058 defcsw
->con_startup();
3059 con_back
->flag
|= CON_DRIVER_FLAG_INIT
;
3061 * vgacon may change the default driver to point
3062 * to dummycon, we restore it here...
3064 conswitchp
= defconsw
;
3067 if (!con_is_bound(csw
))
3068 con_driver
->flag
&= ~CON_DRIVER_FLAG_INIT
;
3070 release_console_sem();
3071 /* ignore return value, binding should not fail */
3072 bind_con_driver(defcsw
, first
, last
, deflt
);
3079 static int vt_bind(struct con_driver
*con
)
3081 const struct consw
*defcsw
= NULL
, *csw
= NULL
;
3082 int i
, more
= 1, first
= -1, last
= -1, deflt
= 0;
3084 if (!con
->con
|| !(con
->flag
& CON_DRIVER_FLAG_MODULE
) ||
3085 con_is_graphics(con
->con
, con
->first
, con
->last
))
3090 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3091 struct con_driver
*con
= ®istered_con_driver
[i
];
3093 if (con
->con
&& !(con
->flag
& CON_DRIVER_FLAG_MODULE
)) {
3105 for (i
= con
->first
; i
<= con
->last
; i
++) {
3106 if (con_driver_map
[i
] == defcsw
) {
3111 } else if (first
!= -1)
3115 if (first
== 0 && last
== MAX_NR_CONSOLES
-1)
3119 bind_con_driver(csw
, first
, last
, deflt
);
3130 static int vt_unbind(struct con_driver
*con
)
3132 const struct consw
*csw
= NULL
;
3133 int i
, more
= 1, first
= -1, last
= -1, deflt
= 0;
3135 if (!con
->con
|| !(con
->flag
& CON_DRIVER_FLAG_MODULE
) ||
3136 con_is_graphics(con
->con
, con
->first
, con
->last
))
3144 for (i
= con
->first
; i
<= con
->last
; i
++) {
3145 if (con_driver_map
[i
] == csw
) {
3150 } else if (first
!= -1)
3154 if (first
== 0 && last
== MAX_NR_CONSOLES
-1)
3158 unbind_con_driver(csw
, first
, last
, deflt
);
3169 static inline int vt_bind(struct con_driver
*con
)
3173 static inline int vt_unbind(struct con_driver
*con
)
3177 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3179 static ssize_t
store_bind(struct device
*dev
, struct device_attribute
*attr
,
3180 const char *buf
, size_t count
)
3182 struct con_driver
*con
= dev_get_drvdata(dev
);
3183 int bind
= simple_strtoul(buf
, NULL
, 0);
3193 static ssize_t
show_bind(struct device
*dev
, struct device_attribute
*attr
,
3196 struct con_driver
*con
= dev_get_drvdata(dev
);
3197 int bind
= con_is_bound(con
->con
);
3199 return snprintf(buf
, PAGE_SIZE
, "%i\n", bind
);
3202 static ssize_t
show_name(struct device
*dev
, struct device_attribute
*attr
,
3205 struct con_driver
*con
= dev_get_drvdata(dev
);
3207 return snprintf(buf
, PAGE_SIZE
, "%s %s\n",
3208 (con
->flag
& CON_DRIVER_FLAG_MODULE
) ? "(M)" : "(S)",
3213 static struct device_attribute device_attrs
[] = {
3214 __ATTR(bind
, S_IRUGO
|S_IWUSR
, show_bind
, store_bind
),
3215 __ATTR(name
, S_IRUGO
, show_name
, NULL
),
3218 static int vtconsole_init_device(struct con_driver
*con
)
3223 con
->flag
|= CON_DRIVER_FLAG_ATTR
;
3224 dev_set_drvdata(con
->dev
, con
);
3225 for (i
= 0; i
< ARRAY_SIZE(device_attrs
); i
++) {
3226 error
= device_create_file(con
->dev
, &device_attrs
[i
]);
3233 device_remove_file(con
->dev
, &device_attrs
[i
]);
3234 con
->flag
&= ~CON_DRIVER_FLAG_ATTR
;
3240 static void vtconsole_deinit_device(struct con_driver
*con
)
3244 if (con
->flag
& CON_DRIVER_FLAG_ATTR
) {
3245 for (i
= 0; i
< ARRAY_SIZE(device_attrs
); i
++)
3246 device_remove_file(con
->dev
, &device_attrs
[i
]);
3247 con
->flag
&= ~CON_DRIVER_FLAG_ATTR
;
3252 * con_is_bound - checks if driver is bound to the console
3253 * @csw: console driver
3255 * RETURNS: zero if unbound, nonzero if bound
3257 * Drivers can call this and if zero, they should release
3258 * all resources allocated on con_startup()
3260 int con_is_bound(const struct consw
*csw
)
3264 for (i
= 0; i
< MAX_NR_CONSOLES
; i
++) {
3265 if (con_driver_map
[i
] == csw
) {
3273 EXPORT_SYMBOL(con_is_bound
);
3276 * register_con_driver - register console driver to console layer
3277 * @csw: console driver
3278 * @first: the first console to take over, minimum value is 0
3279 * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1
3281 * DESCRIPTION: This function registers a console driver which can later
3282 * bind to a range of consoles specified by @first and @last. It will
3283 * also initialize the console driver by calling con_startup().
3285 int register_con_driver(const struct consw
*csw
, int first
, int last
)
3287 struct module
*owner
= csw
->owner
;
3288 struct con_driver
*con_driver
;
3292 if (!try_module_get(owner
))
3295 acquire_console_sem();
3297 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3298 con_driver
= ®istered_con_driver
[i
];
3300 /* already registered */
3301 if (con_driver
->con
== csw
)
3308 desc
= csw
->con_startup();
3315 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3316 con_driver
= ®istered_con_driver
[i
];
3318 if (con_driver
->con
== NULL
) {
3319 con_driver
->con
= csw
;
3320 con_driver
->desc
= desc
;
3321 con_driver
->node
= i
;
3322 con_driver
->flag
= CON_DRIVER_FLAG_MODULE
|
3323 CON_DRIVER_FLAG_INIT
;
3324 con_driver
->first
= first
;
3325 con_driver
->last
= last
;
3334 con_driver
->dev
= device_create(vtconsole_class
, NULL
,
3335 MKDEV(0, con_driver
->node
),
3336 "vtcon%i", con_driver
->node
);
3338 if (IS_ERR(con_driver
->dev
)) {
3339 printk(KERN_WARNING
"Unable to create device for %s; "
3340 "errno = %ld\n", con_driver
->desc
,
3341 PTR_ERR(con_driver
->dev
));
3342 con_driver
->dev
= NULL
;
3344 vtconsole_init_device(con_driver
);
3348 release_console_sem();
3352 EXPORT_SYMBOL(register_con_driver
);
3355 * unregister_con_driver - unregister console driver from console layer
3356 * @csw: console driver
3358 * DESCRIPTION: All drivers that registers to the console layer must
3359 * call this function upon exit, or if the console driver is in a state
3360 * where it won't be able to handle console services, such as the
3361 * framebuffer console without loaded framebuffer drivers.
3363 * The driver must unbind first prior to unregistration.
3365 int unregister_con_driver(const struct consw
*csw
)
3367 int i
, retval
= -ENODEV
;
3369 acquire_console_sem();
3371 /* cannot unregister a bound driver */
3372 if (con_is_bound(csw
))
3375 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3376 struct con_driver
*con_driver
= ®istered_con_driver
[i
];
3378 if (con_driver
->con
== csw
&&
3379 con_driver
->flag
& CON_DRIVER_FLAG_MODULE
) {
3380 vtconsole_deinit_device(con_driver
);
3381 device_destroy(vtconsole_class
,
3382 MKDEV(0, con_driver
->node
));
3383 con_driver
->con
= NULL
;
3384 con_driver
->desc
= NULL
;
3385 con_driver
->dev
= NULL
;
3386 con_driver
->node
= 0;
3387 con_driver
->flag
= 0;
3388 con_driver
->first
= 0;
3389 con_driver
->last
= 0;
3395 release_console_sem();
3398 EXPORT_SYMBOL(unregister_con_driver
);
3401 * If we support more console drivers, this function is used
3402 * when a driver wants to take over some existing consoles
3403 * and become default driver for newly opened ones.
3405 * take_over_console is basically a register followed by unbind
3407 int take_over_console(const struct consw
*csw
, int first
, int last
, int deflt
)
3411 err
= register_con_driver(csw
, first
, last
);
3414 bind_con_driver(csw
, first
, last
, deflt
);
3420 * give_up_console is a wrapper to unregister_con_driver. It will only
3421 * work if driver is fully unbound.
3423 void give_up_console(const struct consw
*csw
)
3425 unregister_con_driver(csw
);
3428 static int __init
vtconsole_class_init(void)
3432 vtconsole_class
= class_create(THIS_MODULE
, "vtconsole");
3433 if (IS_ERR(vtconsole_class
)) {
3434 printk(KERN_WARNING
"Unable to create vt console class; "
3435 "errno = %ld\n", PTR_ERR(vtconsole_class
));
3436 vtconsole_class
= NULL
;
3439 /* Add system drivers to sysfs */
3440 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3441 struct con_driver
*con
= ®istered_con_driver
[i
];
3443 if (con
->con
&& !con
->dev
) {
3444 con
->dev
= device_create(vtconsole_class
, NULL
,
3445 MKDEV(0, con
->node
),
3446 "vtcon%i", con
->node
);
3448 if (IS_ERR(con
->dev
)) {
3449 printk(KERN_WARNING
"Unable to create "
3450 "device for %s; errno = %ld\n",
3451 con
->desc
, PTR_ERR(con
->dev
));
3454 vtconsole_init_device(con
);
3461 postcore_initcall(vtconsole_class_init
);
3469 static int set_vesa_blanking(char __user
*p
)
3473 if (get_user(mode
, p
+ 1))
3476 vesa_blank_mode
= (mode
< 4) ? mode
: 0;
3480 void do_blank_screen(int entering_gfx
)
3482 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
3485 WARN_CONSOLE_UNLOCKED();
3487 if (console_blanked
) {
3488 if (blank_state
== blank_vesa_wait
) {
3489 blank_state
= blank_off
;
3490 vc
->vc_sw
->con_blank(vc
, vesa_blank_mode
+ 1, 0);
3494 if (blank_state
!= blank_normal_wait
)
3496 blank_state
= blank_off
;
3498 /* entering graphics mode? */
3502 vc
->vc_sw
->con_blank(vc
, -1, 1);
3503 console_blanked
= fg_console
+ 1;
3508 /* don't blank graphics */
3509 if (vc
->vc_mode
!= KD_TEXT
) {
3510 console_blanked
= fg_console
+ 1;
3515 del_timer_sync(&console_timer
);
3516 blank_timer_expired
= 0;
3519 /* In case we need to reset origin, blanking hook returns 1 */
3520 i
= vc
->vc_sw
->con_blank(vc
, vesa_off_interval
? 1 : (vesa_blank_mode
+ 1), 0);
3521 console_blanked
= fg_console
+ 1;
3525 if (console_blank_hook
&& console_blank_hook(1))
3528 if (vesa_off_interval
&& vesa_blank_mode
) {
3529 blank_state
= blank_vesa_wait
;
3530 mod_timer(&console_timer
, jiffies
+ vesa_off_interval
);
3533 EXPORT_SYMBOL(do_blank_screen
);
3536 * Called by timer as well as from vt_console_driver
3538 void do_unblank_screen(int leaving_gfx
)
3542 /* This should now always be called from a "sane" (read: can schedule)
3543 * context for the sake of the low level drivers, except in the special
3544 * case of oops_in_progress
3546 if (!oops_in_progress
)
3549 WARN_CONSOLE_UNLOCKED();
3552 if (!console_blanked
)
3554 if (!vc_cons_allocated(fg_console
)) {
3556 printk("unblank_screen: tty %d not allocated ??\n", fg_console
+1);
3559 vc
= vc_cons
[fg_console
].d
;
3560 if (vc
->vc_mode
!= KD_TEXT
)
3561 return; /* but leave console_blanked != 0 */
3563 if (blankinterval
) {
3564 mod_timer(&console_timer
, jiffies
+ blankinterval
);
3565 blank_state
= blank_normal_wait
;
3568 console_blanked
= 0;
3569 if (vc
->vc_sw
->con_blank(vc
, 0, leaving_gfx
))
3570 /* Low-level driver cannot restore -> do it ourselves */
3572 if (console_blank_hook
)
3573 console_blank_hook(0);
3577 EXPORT_SYMBOL(do_unblank_screen
);
3580 * This is called by the outside world to cause a forced unblank, mostly for
3581 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
3582 * call it with 1 as an argument and so force a mode restore... that may kill
3583 * X or at least garbage the screen but would also make the Oops visible...
3585 void unblank_screen(void)
3587 do_unblank_screen(0);
3591 * We defer the timer blanking to work queue so it can take the console mutex
3592 * (console operations can still happen at irq time, but only from printk which
3593 * has the console mutex. Not perfect yet, but better than no locking
3595 static void blank_screen_t(unsigned long dummy
)
3597 if (unlikely(!keventd_up())) {
3598 mod_timer(&console_timer
, jiffies
+ blankinterval
);
3601 blank_timer_expired
= 1;
3602 schedule_work(&console_work
);
3605 void poke_blanked_console(void)
3607 WARN_CONSOLE_UNLOCKED();
3609 /* Add this so we quickly catch whoever might call us in a non
3610 * safe context. Nowadays, unblank_screen() isn't to be called in
3611 * atomic contexts and is allowed to schedule (with the special case
3612 * of oops_in_progress, but that isn't of any concern for this
3617 /* This isn't perfectly race free, but a race here would be mostly harmless,
3618 * at worse, we'll do a spurrious blank and it's unlikely
3620 del_timer(&console_timer
);
3621 blank_timer_expired
= 0;
3623 if (ignore_poke
|| !vc_cons
[fg_console
].d
|| vc_cons
[fg_console
].d
->vc_mode
== KD_GRAPHICS
)
3625 if (console_blanked
)
3627 else if (blankinterval
) {
3628 mod_timer(&console_timer
, jiffies
+ blankinterval
);
3629 blank_state
= blank_normal_wait
;
3637 static void set_palette(struct vc_data
*vc
)
3639 WARN_CONSOLE_UNLOCKED();
3641 if (vc
->vc_mode
!= KD_GRAPHICS
)
3642 vc
->vc_sw
->con_set_palette(vc
, color_table
);
3645 static int set_get_cmap(unsigned char __user
*arg
, int set
)
3649 WARN_CONSOLE_UNLOCKED();
3651 for (i
= 0; i
< 16; i
++)
3653 get_user(default_red
[i
], arg
++);
3654 get_user(default_grn
[i
], arg
++);
3655 get_user(default_blu
[i
], arg
++);
3657 put_user(default_red
[i
], arg
++);
3658 put_user(default_grn
[i
], arg
++);
3659 put_user(default_blu
[i
], arg
++);
3662 for (i
= 0; i
< MAX_NR_CONSOLES
; i
++)
3663 if (vc_cons_allocated(i
)) {
3664 for (j
= k
= 0; j
< 16; j
++) {
3665 vc_cons
[i
].d
->vc_palette
[k
++] = default_red
[j
];
3666 vc_cons
[i
].d
->vc_palette
[k
++] = default_grn
[j
];
3667 vc_cons
[i
].d
->vc_palette
[k
++] = default_blu
[j
];
3669 set_palette(vc_cons
[i
].d
);
3676 * Load palette into the DAC registers. arg points to a colour
3677 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
3680 int con_set_cmap(unsigned char __user
*arg
)
3684 acquire_console_sem();
3685 rc
= set_get_cmap (arg
,1);
3686 release_console_sem();
3691 int con_get_cmap(unsigned char __user
*arg
)
3695 acquire_console_sem();
3696 rc
= set_get_cmap (arg
,0);
3697 release_console_sem();
3702 void reset_palette(struct vc_data
*vc
)
3705 for (j
=k
=0; j
<16; j
++) {
3706 vc
->vc_palette
[k
++] = default_red
[j
];
3707 vc
->vc_palette
[k
++] = default_grn
[j
];
3708 vc
->vc_palette
[k
++] = default_blu
[j
];
3716 * Currently we only support fonts up to 32 pixels wide, at a maximum height
3717 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
3718 * depending on width) reserved for each character which is kinda wasty, but
3719 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
3720 * is upto the actual low-level console-driver convert data into its favorite
3721 * format (maybe we should add a `fontoffset' field to the `display'
3722 * structure so we won't have to convert the fontdata all the time.
3726 #define max_font_size 65536
3728 static int con_font_get(struct vc_data
*vc
, struct console_font_op
*op
)
3730 struct console_font font
;
3734 if (vc
->vc_mode
!= KD_TEXT
)
3738 font
.data
= kmalloc(max_font_size
, GFP_KERNEL
);
3744 acquire_console_sem();
3745 if (vc
->vc_sw
->con_font_get
)
3746 rc
= vc
->vc_sw
->con_font_get(vc
, &font
);
3749 release_console_sem();
3754 c
= (font
.width
+7)/8 * 32 * font
.charcount
;
3756 if (op
->data
&& font
.charcount
> op
->charcount
)
3758 if (!(op
->flags
& KD_FONT_FLAG_OLD
)) {
3759 if (font
.width
> op
->width
|| font
.height
> op
->height
)
3762 if (font
.width
!= 8)
3764 else if ((op
->height
&& font
.height
> op
->height
) ||
3771 op
->height
= font
.height
;
3772 op
->width
= font
.width
;
3773 op
->charcount
= font
.charcount
;
3775 if (op
->data
&& copy_to_user(op
->data
, font
.data
, c
))
3783 static int con_font_set(struct vc_data
*vc
, struct console_font_op
*op
)
3785 struct console_font font
;
3789 if (vc
->vc_mode
!= KD_TEXT
)
3793 if (op
->charcount
> 512)
3795 if (!op
->height
) { /* Need to guess font height [compat] */
3797 u8 __user
*charmap
= op
->data
;
3800 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
3801 so that we can get rid of this soon */
3802 if (!(op
->flags
& KD_FONT_FLAG_OLD
))
3804 for (h
= 32; h
> 0; h
--)
3805 for (i
= 0; i
< op
->charcount
; i
++) {
3806 if (get_user(tmp
, &charmap
[32*i
+h
-1]))
3815 if (op
->width
<= 0 || op
->width
> 32 || op
->height
> 32)
3817 size
= (op
->width
+7)/8 * 32 * op
->charcount
;
3818 if (size
> max_font_size
)
3820 font
.charcount
= op
->charcount
;
3821 font
.height
= op
->height
;
3822 font
.width
= op
->width
;
3823 font
.data
= kmalloc(size
, GFP_KERNEL
);
3826 if (copy_from_user(font
.data
, op
->data
, size
)) {
3830 acquire_console_sem();
3831 if (vc
->vc_sw
->con_font_set
)
3832 rc
= vc
->vc_sw
->con_font_set(vc
, &font
, op
->flags
);
3835 release_console_sem();
3840 static int con_font_default(struct vc_data
*vc
, struct console_font_op
*op
)
3842 struct console_font font
= {.width
= op
->width
, .height
= op
->height
};
3843 char name
[MAX_FONT_NAME
];
3847 if (vc
->vc_mode
!= KD_TEXT
)
3852 else if (strncpy_from_user(name
, op
->data
, MAX_FONT_NAME
- 1) < 0)
3855 name
[MAX_FONT_NAME
- 1] = 0;
3857 acquire_console_sem();
3858 if (vc
->vc_sw
->con_font_default
)
3859 rc
= vc
->vc_sw
->con_font_default(vc
, &font
, s
);
3862 release_console_sem();
3864 op
->width
= font
.width
;
3865 op
->height
= font
.height
;
3870 static int con_font_copy(struct vc_data
*vc
, struct console_font_op
*op
)
3872 int con
= op
->height
;
3875 if (vc
->vc_mode
!= KD_TEXT
)
3878 acquire_console_sem();
3879 if (!vc
->vc_sw
->con_font_copy
)
3881 else if (con
< 0 || !vc_cons_allocated(con
))
3883 else if (con
== vc
->vc_num
) /* nothing to do */
3886 rc
= vc
->vc_sw
->con_font_copy(vc
, con
);
3887 release_console_sem();
3891 int con_font_op(struct vc_data
*vc
, struct console_font_op
*op
)
3894 case KD_FONT_OP_SET
:
3895 return con_font_set(vc
, op
);
3896 case KD_FONT_OP_GET
:
3897 return con_font_get(vc
, op
);
3898 case KD_FONT_OP_SET_DEFAULT
:
3899 return con_font_default(vc
, op
);
3900 case KD_FONT_OP_COPY
:
3901 return con_font_copy(vc
, op
);
3907 * Interface exported to selection and vcs.
3910 /* used by selection */
3911 u16
screen_glyph(struct vc_data
*vc
, int offset
)
3913 u16 w
= scr_readw(screenpos(vc
, offset
, 1));
3916 if (w
& vc
->vc_hi_font_mask
)
3921 /* used by vcs - note the word offset */
3922 unsigned short *screen_pos(struct vc_data
*vc
, int w_offset
, int viewed
)
3924 return screenpos(vc
, 2 * w_offset
, viewed
);
3927 void getconsxy(struct vc_data
*vc
, unsigned char *p
)
3933 void putconsxy(struct vc_data
*vc
, unsigned char *p
)
3936 gotoxy(vc
, p
[0], p
[1]);
3940 u16
vcs_scr_readw(struct vc_data
*vc
, const u16
*org
)
3942 if ((unsigned long)org
== vc
->vc_pos
&& softcursor_original
!= -1)
3943 return softcursor_original
;
3944 return scr_readw(org
);
3947 void vcs_scr_writew(struct vc_data
*vc
, u16 val
, u16
*org
)
3949 scr_writew(val
, org
);
3950 if ((unsigned long)org
== vc
->vc_pos
) {
3951 softcursor_original
= -1;
3957 * Visible symbols for modules
3960 EXPORT_SYMBOL(color_table
);
3961 EXPORT_SYMBOL(default_red
);
3962 EXPORT_SYMBOL(default_grn
);
3963 EXPORT_SYMBOL(default_blu
);
3964 EXPORT_SYMBOL(update_region
);
3965 EXPORT_SYMBOL(redraw_screen
);
3966 EXPORT_SYMBOL(vc_resize
);
3967 EXPORT_SYMBOL(vc_lock_resize
);
3968 EXPORT_SYMBOL(fg_console
);
3969 EXPORT_SYMBOL(console_blank_hook
);
3970 EXPORT_SYMBOL(console_blanked
);
3971 EXPORT_SYMBOL(vc_cons
);
3972 #ifndef VT_SINGLE_DRIVER
3973 EXPORT_SYMBOL(take_over_console
);
3974 EXPORT_SYMBOL(give_up_console
);