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 #define vt_get_kmsg_redirect() vt_kmsg_redirect(-1)
161 static int printable
; /* Is console ready for printing? */
162 int default_utf8
= true;
163 module_param(default_utf8
, int, S_IRUGO
| S_IWUSR
);
164 int global_cursor_default
= -1;
165 module_param(global_cursor_default
, int, S_IRUGO
| S_IWUSR
);
167 static int cur_default
= CUR_DEFAULT
;
168 module_param(cur_default
, int, S_IRUGO
| S_IWUSR
);
171 * ignore_poke: don't unblank the screen when things are typed. This is
172 * mainly for the privacy of braille terminal users.
174 static int ignore_poke
;
176 int do_poke_blanked_console
;
179 static int vesa_blank_mode
; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
180 static int vesa_off_interval
;
181 static int blankinterval
= 10*60;
182 core_param(consoleblank
, blankinterval
, int, 0444);
184 static DECLARE_WORK(console_work
, console_callback
);
187 * fg_console is the current virtual console,
188 * last_console is the last used one,
189 * want_console is the console we want to switch to,
190 * saved_* variants are for save/restore around kernel debugger enter/leave
194 int want_console
= -1;
195 static int saved_fg_console
;
196 static int saved_last_console
;
197 static int saved_want_console
;
198 static int saved_vc_mode
;
199 static int saved_console_blanked
;
202 * For each existing display, we have a pointer to console currently visible
203 * on that display, allowing consoles other than fg_console to be refreshed
204 * appropriately. Unless the low-level driver supplies its own display_fg
205 * variable, we use this one for the "master display".
207 static struct vc_data
*master_display_fg
;
210 * Unfortunately, we need to delay tty echo when we're currently writing to the
211 * console since the code is (and always was) not re-entrant, so we schedule
212 * all flip requests to process context with schedule-task() and run it from
213 * console_callback().
217 * For the same reason, we defer scrollback to the console callback.
219 static int scrollback_delta
;
222 * Hook so that the power management routines can (un)blank
223 * the console on our behalf.
225 int (*console_blank_hook
)(int);
227 static DEFINE_TIMER(console_timer
, blank_screen_t
, 0, 0);
228 static int blank_state
;
229 static int blank_timer_expired
;
237 * /sys/class/tty/tty0/
239 * the attribute 'active' contains the name of the current vc
240 * console and it supports poll() to detect vc switches
242 static struct device
*tty0dev
;
245 * Notifier list for console events.
247 static ATOMIC_NOTIFIER_HEAD(vt_notifier_list
);
249 int register_vt_notifier(struct notifier_block
*nb
)
251 return atomic_notifier_chain_register(&vt_notifier_list
, nb
);
253 EXPORT_SYMBOL_GPL(register_vt_notifier
);
255 int unregister_vt_notifier(struct notifier_block
*nb
)
257 return atomic_notifier_chain_unregister(&vt_notifier_list
, nb
);
259 EXPORT_SYMBOL_GPL(unregister_vt_notifier
);
261 static void notify_write(struct vc_data
*vc
, unsigned int unicode
)
263 struct vt_notifier_param param
= { .vc
= vc
, .c
= unicode
};
264 atomic_notifier_call_chain(&vt_notifier_list
, VT_WRITE
, ¶m
);
267 static void notify_update(struct vc_data
*vc
)
269 struct vt_notifier_param param
= { .vc
= vc
};
270 atomic_notifier_call_chain(&vt_notifier_list
, VT_UPDATE
, ¶m
);
273 * Low-Level Functions
276 #define IS_FG(vc) ((vc)->vc_num == fg_console)
278 #ifdef VT_BUF_VRAM_ONLY
279 #define DO_UPDATE(vc) 0
281 #define DO_UPDATE(vc) (CON_IS_VISIBLE(vc) && !console_blanked)
284 static inline unsigned short *screenpos(struct vc_data
*vc
, int offset
, int viewed
)
289 p
= (unsigned short *)(vc
->vc_origin
+ offset
);
290 else if (!vc
->vc_sw
->con_screen_pos
)
291 p
= (unsigned short *)(vc
->vc_visible_origin
+ offset
);
293 p
= vc
->vc_sw
->con_screen_pos(vc
, offset
);
297 /* Called from the keyboard irq path.. */
298 static inline void scrolldelta(int lines
)
301 /* scrolldelta needs some kind of consistency lock, but the BKL was
302 and still is not protecting versus the scheduled back end */
303 scrollback_delta
+= lines
;
304 schedule_console_callback();
307 void schedule_console_callback(void)
309 schedule_work(&console_work
);
312 static void scrup(struct vc_data
*vc
, unsigned int t
, unsigned int b
, int nr
)
314 unsigned short *d
, *s
;
318 if (b
> vc
->vc_rows
|| t
>= b
|| nr
< 1)
320 if (CON_IS_VISIBLE(vc
) && vc
->vc_sw
->con_scroll(vc
, t
, b
, SM_UP
, nr
))
322 d
= (unsigned short *)(vc
->vc_origin
+ vc
->vc_size_row
* t
);
323 s
= (unsigned short *)(vc
->vc_origin
+ vc
->vc_size_row
* (t
+ nr
));
324 scr_memmovew(d
, s
, (b
- t
- nr
) * vc
->vc_size_row
);
325 scr_memsetw(d
+ (b
- t
- nr
) * vc
->vc_cols
, vc
->vc_video_erase_char
,
326 vc
->vc_size_row
* nr
);
329 static void scrdown(struct vc_data
*vc
, unsigned int t
, unsigned int b
, int nr
)
336 if (b
> vc
->vc_rows
|| t
>= b
|| nr
< 1)
338 if (CON_IS_VISIBLE(vc
) && vc
->vc_sw
->con_scroll(vc
, t
, b
, SM_DOWN
, nr
))
340 s
= (unsigned short *)(vc
->vc_origin
+ vc
->vc_size_row
* t
);
341 step
= vc
->vc_cols
* nr
;
342 scr_memmovew(s
+ step
, s
, (b
- t
- nr
) * vc
->vc_size_row
);
343 scr_memsetw(s
, vc
->vc_video_erase_char
, 2 * step
);
346 static void do_update_region(struct vc_data
*vc
, unsigned long start
, int count
)
348 #ifndef VT_BUF_VRAM_ONLY
349 unsigned int xx
, yy
, offset
;
353 if (!vc
->vc_sw
->con_getxy
) {
354 offset
= (start
- vc
->vc_origin
) / 2;
355 xx
= offset
% vc
->vc_cols
;
356 yy
= offset
/ vc
->vc_cols
;
359 start
= vc
->vc_sw
->con_getxy(vc
, start
, &nxx
, &nyy
);
363 u16 attrib
= scr_readw(p
) & 0xff00;
366 while (xx
< vc
->vc_cols
&& count
) {
367 if (attrib
!= (scr_readw(p
) & 0xff00)) {
369 vc
->vc_sw
->con_putcs(vc
, q
, p
-q
, yy
, startx
);
372 attrib
= scr_readw(p
) & 0xff00;
379 vc
->vc_sw
->con_putcs(vc
, q
, p
-q
, yy
, startx
);
384 if (vc
->vc_sw
->con_getxy
) {
386 start
= vc
->vc_sw
->con_getxy(vc
, start
, NULL
, NULL
);
392 void update_region(struct vc_data
*vc
, unsigned long start
, int count
)
394 WARN_CONSOLE_UNLOCKED();
398 do_update_region(vc
, start
, count
);
403 /* Structure of attributes is hardware-dependent */
405 static u8
build_attr(struct vc_data
*vc
, u8 _color
, u8 _intensity
, u8 _blink
,
406 u8 _underline
, u8 _reverse
, u8 _italic
)
408 if (vc
->vc_sw
->con_build_attr
)
409 return vc
->vc_sw
->con_build_attr(vc
, _color
, _intensity
,
410 _blink
, _underline
, _reverse
, _italic
);
412 #ifndef VT_BUF_VRAM_ONLY
414 * ++roman: I completely changed the attribute format for monochrome
415 * mode (!can_do_color). The formerly used MDA (monochrome display
416 * adapter) format didn't allow the combination of certain effects.
417 * Now the attribute is just a bit vector:
418 * Bit 0..1: intensity (0..2)
425 if (!vc
->vc_can_do_color
)
428 (_underline
? 4 : 0) |
432 a
= (a
& 0xF0) | vc
->vc_itcolor
;
434 a
= (a
& 0xf0) | vc
->vc_ulcolor
;
435 else if (_intensity
== 0)
436 a
= (a
& 0xf0) | vc
->vc_ulcolor
;
438 a
= ((a
) & 0x88) | ((((a
) >> 4) | ((a
) << 4)) & 0x77);
443 if (vc
->vc_hi_font_mask
== 0x100)
452 static void update_attr(struct vc_data
*vc
)
454 vc
->vc_attr
= build_attr(vc
, vc
->vc_color
, vc
->vc_intensity
,
455 vc
->vc_blink
, vc
->vc_underline
,
456 vc
->vc_reverse
^ vc
->vc_decscnm
, vc
->vc_italic
);
457 vc
->vc_video_erase_char
= (build_attr(vc
, vc
->vc_color
, 1, vc
->vc_blink
, 0, vc
->vc_decscnm
, 0) << 8) | ' ';
460 /* Note: inverting the screen twice should revert to the original state */
461 void invert_screen(struct vc_data
*vc
, int offset
, int count
, int viewed
)
465 WARN_CONSOLE_UNLOCKED();
468 p
= screenpos(vc
, offset
, viewed
);
469 if (vc
->vc_sw
->con_invert_region
)
470 vc
->vc_sw
->con_invert_region(vc
, p
, count
);
471 #ifndef VT_BUF_VRAM_ONLY
477 if (!vc
->vc_can_do_color
) {
484 } else if (vc
->vc_hi_font_mask
== 0x100) {
487 a
= ((a
) & 0x11ff) | (((a
) & 0xe000) >> 4) | (((a
) & 0x0e00) << 4);
494 a
= ((a
) & 0x88ff) | (((a
) & 0x7000) >> 4) | (((a
) & 0x0700) << 4);
502 do_update_region(vc
, (unsigned long) p
, count
);
506 /* used by selection: complement pointer position */
507 void complement_pos(struct vc_data
*vc
, int offset
)
509 static int old_offset
= -1;
510 static unsigned short old
;
511 static unsigned short oldx
, oldy
;
513 WARN_CONSOLE_UNLOCKED();
515 if (old_offset
!= -1 && old_offset
>= 0 &&
516 old_offset
< vc
->vc_screenbuf_size
) {
517 scr_writew(old
, screenpos(vc
, old_offset
, 1));
519 vc
->vc_sw
->con_putc(vc
, old
, oldy
, oldx
);
525 if (offset
!= -1 && offset
>= 0 &&
526 offset
< vc
->vc_screenbuf_size
) {
529 p
= screenpos(vc
, offset
, 1);
531 new = old
^ vc
->vc_complement_mask
;
534 oldx
= (offset
>> 1) % vc
->vc_cols
;
535 oldy
= (offset
>> 1) / vc
->vc_cols
;
536 vc
->vc_sw
->con_putc(vc
, new, oldy
, oldx
);
542 static void insert_char(struct vc_data
*vc
, unsigned int nr
)
544 unsigned short *p
= (unsigned short *) vc
->vc_pos
;
546 scr_memmovew(p
+ nr
, p
, (vc
->vc_cols
- vc
->vc_x
- nr
) * 2);
547 scr_memsetw(p
, vc
->vc_video_erase_char
, nr
* 2);
548 vc
->vc_need_wrap
= 0;
550 do_update_region(vc
, (unsigned long) p
,
551 vc
->vc_cols
- vc
->vc_x
);
554 static void delete_char(struct vc_data
*vc
, unsigned int nr
)
556 unsigned short *p
= (unsigned short *) vc
->vc_pos
;
558 scr_memcpyw(p
, p
+ nr
, (vc
->vc_cols
- vc
->vc_x
- nr
) * 2);
559 scr_memsetw(p
+ vc
->vc_cols
- vc
->vc_x
- nr
, vc
->vc_video_erase_char
,
561 vc
->vc_need_wrap
= 0;
563 do_update_region(vc
, (unsigned long) p
,
564 vc
->vc_cols
- vc
->vc_x
);
567 static int softcursor_original
;
569 static void add_softcursor(struct vc_data
*vc
)
571 int i
= scr_readw((u16
*) vc
->vc_pos
);
572 u32 type
= vc
->vc_cursor_type
;
574 if (! (type
& 0x10)) return;
575 if (softcursor_original
!= -1) return;
576 softcursor_original
= i
;
577 i
|= ((type
>> 8) & 0xff00 );
578 i
^= ((type
) & 0xff00 );
579 if ((type
& 0x20) && ((softcursor_original
& 0x7000) == (i
& 0x7000))) i
^= 0x7000;
580 if ((type
& 0x40) && ((i
& 0x700) == ((i
& 0x7000) >> 4))) i
^= 0x0700;
581 scr_writew(i
, (u16
*) vc
->vc_pos
);
583 vc
->vc_sw
->con_putc(vc
, i
, vc
->vc_y
, vc
->vc_x
);
586 static void hide_softcursor(struct vc_data
*vc
)
588 if (softcursor_original
!= -1) {
589 scr_writew(softcursor_original
, (u16
*)vc
->vc_pos
);
591 vc
->vc_sw
->con_putc(vc
, softcursor_original
,
593 softcursor_original
= -1;
597 static void hide_cursor(struct vc_data
*vc
)
601 vc
->vc_sw
->con_cursor(vc
, CM_ERASE
);
605 static void set_cursor(struct vc_data
*vc
)
607 if (!IS_FG(vc
) || console_blanked
||
608 vc
->vc_mode
== KD_GRAPHICS
)
614 if ((vc
->vc_cursor_type
& 0x0f) != 1)
615 vc
->vc_sw
->con_cursor(vc
, CM_DRAW
);
620 static void set_origin(struct vc_data
*vc
)
622 WARN_CONSOLE_UNLOCKED();
624 if (!CON_IS_VISIBLE(vc
) ||
625 !vc
->vc_sw
->con_set_origin
||
626 !vc
->vc_sw
->con_set_origin(vc
))
627 vc
->vc_origin
= (unsigned long)vc
->vc_screenbuf
;
628 vc
->vc_visible_origin
= vc
->vc_origin
;
629 vc
->vc_scr_end
= vc
->vc_origin
+ vc
->vc_screenbuf_size
;
630 vc
->vc_pos
= vc
->vc_origin
+ vc
->vc_size_row
* vc
->vc_y
+ 2 * vc
->vc_x
;
633 static inline void save_screen(struct vc_data
*vc
)
635 WARN_CONSOLE_UNLOCKED();
637 if (vc
->vc_sw
->con_save_screen
)
638 vc
->vc_sw
->con_save_screen(vc
);
642 * Redrawing of screen
645 void clear_buffer_attributes(struct vc_data
*vc
)
647 unsigned short *p
= (unsigned short *)vc
->vc_origin
;
648 int count
= vc
->vc_screenbuf_size
/ 2;
649 int mask
= vc
->vc_hi_font_mask
| 0xff;
651 for (; count
> 0; count
--, p
++) {
652 scr_writew((scr_readw(p
)&mask
) | (vc
->vc_video_erase_char
& ~mask
), p
);
656 void redraw_screen(struct vc_data
*vc
, int is_switch
)
660 WARN_CONSOLE_UNLOCKED();
664 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
669 struct vc_data
*old_vc
= vc_cons
[fg_console
].d
;
672 if (!CON_IS_VISIBLE(vc
))
674 *vc
->vc_display_fg
= vc
;
675 fg_console
= vc
->vc_num
;
677 if (!CON_IS_VISIBLE(old_vc
)) {
682 sysfs_notify(&tty0dev
->kobj
, NULL
, "active");
690 int old_was_color
= vc
->vc_can_do_color
;
693 update
= vc
->vc_sw
->con_switch(vc
);
696 * If console changed from mono<->color, the best we can do
697 * is to clear the buffer attributes. As it currently stands,
698 * rebuilding new attributes from the old buffer is not doable
699 * without overly complex code.
701 if (old_was_color
!= vc
->vc_can_do_color
) {
703 clear_buffer_attributes(vc
);
706 /* Forcibly update if we're panicing */
707 if ((update
&& vc
->vc_mode
!= KD_GRAPHICS
) ||
708 vt_force_oops_output(vc
))
709 do_update_region(vc
, vc
->vc_origin
, vc
->vc_screenbuf_size
/ 2);
714 compute_shiftstate();
720 * Allocation, freeing and resizing of VTs.
723 int vc_cons_allocated(unsigned int i
)
725 return (i
< MAX_NR_CONSOLES
&& vc_cons
[i
].d
);
728 static void visual_init(struct vc_data
*vc
, int num
, int init
)
730 /* ++Geert: vc->vc_sw->con_init determines console size */
732 module_put(vc
->vc_sw
->owner
);
733 vc
->vc_sw
= conswitchp
;
734 #ifndef VT_SINGLE_DRIVER
735 if (con_driver_map
[num
])
736 vc
->vc_sw
= con_driver_map
[num
];
738 __module_get(vc
->vc_sw
->owner
);
740 vc
->vc_display_fg
= &master_display_fg
;
741 vc
->vc_uni_pagedir_loc
= &vc
->vc_uni_pagedir
;
742 vc
->vc_uni_pagedir
= NULL
;
743 vc
->vc_hi_font_mask
= 0;
744 vc
->vc_complement_mask
= 0;
745 vc
->vc_can_do_color
= 0;
746 vc
->vc_panic_force_write
= false;
747 vc
->vc_sw
->con_init(vc
, init
);
748 if (!vc
->vc_complement_mask
)
749 vc
->vc_complement_mask
= vc
->vc_can_do_color
? 0x7700 : 0x0800;
750 vc
->vc_s_complement_mask
= vc
->vc_complement_mask
;
751 vc
->vc_size_row
= vc
->vc_cols
<< 1;
752 vc
->vc_screenbuf_size
= vc
->vc_rows
* vc
->vc_size_row
;
755 int vc_allocate(unsigned int currcons
) /* return 0 on success */
757 WARN_CONSOLE_UNLOCKED();
759 if (currcons
>= MAX_NR_CONSOLES
)
761 if (!vc_cons
[currcons
].d
) {
763 struct vt_notifier_param param
;
765 /* prevent users from taking too much memory */
766 if (currcons
>= MAX_NR_USER_CONSOLES
&& !capable(CAP_SYS_RESOURCE
))
769 /* due to the granularity of kmalloc, we waste some memory here */
770 /* the alloc is done in two steps, to optimize the common situation
771 of a 25x80 console (structsize=216, screenbuf_size=4000) */
772 /* although the numbers above are not valid since long ago, the
773 point is still up-to-date and the comment still has its value
774 even if only as a historical artifact. --mj, July 1998 */
775 param
.vc
= vc
= kzalloc(sizeof(struct vc_data
), GFP_KERNEL
);
778 vc_cons
[currcons
].d
= vc
;
779 tty_port_init(&vc
->port
);
780 INIT_WORK(&vc_cons
[currcons
].SAK_work
, vc_SAK
);
781 visual_init(vc
, currcons
, 1);
782 if (!*vc
->vc_uni_pagedir_loc
)
783 con_set_default_unimap(vc
);
784 vc
->vc_screenbuf
= kmalloc(vc
->vc_screenbuf_size
, GFP_KERNEL
);
785 if (!vc
->vc_screenbuf
) {
787 vc_cons
[currcons
].d
= NULL
;
791 /* If no drivers have overridden us and the user didn't pass a
792 boot option, default to displaying the cursor */
793 if (global_cursor_default
== -1)
794 global_cursor_default
= 1;
796 vc_init(vc
, vc
->vc_rows
, vc
->vc_cols
, 1);
797 vcs_make_sysfs(currcons
);
798 atomic_notifier_call_chain(&vt_notifier_list
, VT_ALLOCATE
, ¶m
);
803 static inline int resize_screen(struct vc_data
*vc
, int width
, int height
,
806 /* Resizes the resolution of the display adapater */
809 if (vc
->vc_mode
!= KD_GRAPHICS
&& vc
->vc_sw
->con_resize
)
810 err
= vc
->vc_sw
->con_resize(vc
, width
, height
, user
);
816 * Change # of rows and columns (0 means unchanged/the size of fg_console)
817 * [this is to be used together with some user program
818 * like resize that changes the hardware videomode]
820 #define VC_RESIZE_MAXCOL (32767)
821 #define VC_RESIZE_MAXROW (32767)
824 * vc_do_resize - resizing method for the tty
825 * @tty: tty being resized
826 * @real_tty: real tty (different to tty if a pty/tty pair)
827 * @vc: virtual console private data
831 * Resize a virtual console, clipping according to the actual constraints.
832 * If the caller passes a tty structure then update the termios winsize
833 * information and perform any necessary signal handling.
835 * Caller must hold the console semaphore. Takes the termios rwsem and
836 * ctrl_lock of the tty IFF a tty is passed.
839 static int vc_do_resize(struct tty_struct
*tty
, struct vc_data
*vc
,
840 unsigned int cols
, unsigned int lines
)
842 unsigned long old_origin
, new_origin
, new_scr_end
, rlth
, rrem
, err
= 0;
844 unsigned int old_rows
, old_row_size
;
845 unsigned int new_cols
, new_rows
, new_row_size
, new_screen_size
;
847 unsigned short *newscreen
;
849 WARN_CONSOLE_UNLOCKED();
854 user
= vc
->vc_resize_user
;
855 vc
->vc_resize_user
= 0;
857 if (cols
> VC_RESIZE_MAXCOL
|| lines
> VC_RESIZE_MAXROW
)
860 new_cols
= (cols
? cols
: vc
->vc_cols
);
861 new_rows
= (lines
? lines
: vc
->vc_rows
);
862 new_row_size
= new_cols
<< 1;
863 new_screen_size
= new_row_size
* new_rows
;
865 if (new_cols
== vc
->vc_cols
&& new_rows
== vc
->vc_rows
)
868 newscreen
= kmalloc(new_screen_size
, GFP_USER
);
872 old_rows
= vc
->vc_rows
;
873 old_row_size
= vc
->vc_size_row
;
875 err
= resize_screen(vc
, new_cols
, new_rows
, user
);
881 vc
->vc_rows
= new_rows
;
882 vc
->vc_cols
= new_cols
;
883 vc
->vc_size_row
= new_row_size
;
884 vc
->vc_screenbuf_size
= new_screen_size
;
886 rlth
= min(old_row_size
, new_row_size
);
887 rrem
= new_row_size
- rlth
;
888 old_origin
= vc
->vc_origin
;
889 new_origin
= (long) newscreen
;
890 new_scr_end
= new_origin
+ new_screen_size
;
892 if (vc
->vc_y
> new_rows
) {
893 if (old_rows
- vc
->vc_y
< new_rows
) {
895 * Cursor near the bottom, copy contents from the
898 old_origin
+= (old_rows
- new_rows
) * old_row_size
;
901 * Cursor is in no man's land, copy 1/2 screenful
902 * from the top and bottom of cursor position
904 old_origin
+= (vc
->vc_y
- new_rows
/2) * old_row_size
;
908 end
= old_origin
+ old_row_size
* min(old_rows
, new_rows
);
912 while (old_origin
< end
) {
913 scr_memcpyw((unsigned short *) new_origin
,
914 (unsigned short *) old_origin
, rlth
);
916 scr_memsetw((void *)(new_origin
+ rlth
),
917 vc
->vc_video_erase_char
, rrem
);
918 old_origin
+= old_row_size
;
919 new_origin
+= new_row_size
;
921 if (new_scr_end
> new_origin
)
922 scr_memsetw((void *)new_origin
, vc
->vc_video_erase_char
,
923 new_scr_end
- new_origin
);
924 kfree(vc
->vc_screenbuf
);
925 vc
->vc_screenbuf
= newscreen
;
926 vc
->vc_screenbuf_size
= new_screen_size
;
929 /* do part of a reset_terminal() */
931 vc
->vc_bottom
= vc
->vc_rows
;
932 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
);
936 /* Rewrite the requested winsize data with the actual
939 memset(&ws
, 0, sizeof(ws
));
940 ws
.ws_row
= vc
->vc_rows
;
941 ws
.ws_col
= vc
->vc_cols
;
942 ws
.ws_ypixel
= vc
->vc_scan_lines
;
943 tty_do_resize(tty
, &ws
);
946 if (CON_IS_VISIBLE(vc
))
948 vt_event_post(VT_EVENT_RESIZE
, vc
->vc_num
, vc
->vc_num
);
953 * vc_resize - resize a VT
954 * @vc: virtual console
958 * Resize a virtual console as seen from the console end of things. We
959 * use the common vc_do_resize methods to update the structures. The
960 * caller must hold the console sem to protect console internals and
964 int vc_resize(struct vc_data
*vc
, unsigned int cols
, unsigned int rows
)
966 return vc_do_resize(vc
->port
.tty
, vc
, cols
, rows
);
970 * vt_resize - resize a VT
971 * @tty: tty to resize
972 * @ws: winsize attributes
974 * Resize a virtual terminal. This is called by the tty layer as we
975 * register our own handler for resizing. The mutual helper does all
978 * Takes the console sem and the called methods then take the tty
979 * termios_rwsem and the tty ctrl_lock in that order.
981 static int vt_resize(struct tty_struct
*tty
, struct winsize
*ws
)
983 struct vc_data
*vc
= tty
->driver_data
;
987 ret
= vc_do_resize(tty
, vc
, ws
->ws_col
, ws
->ws_row
);
992 struct vc_data
*vc_deallocate(unsigned int currcons
)
994 struct vc_data
*vc
= NULL
;
996 WARN_CONSOLE_UNLOCKED();
998 if (vc_cons_allocated(currcons
)) {
999 struct vt_notifier_param param
;
1001 param
.vc
= vc
= vc_cons
[currcons
].d
;
1002 atomic_notifier_call_chain(&vt_notifier_list
, VT_DEALLOCATE
, ¶m
);
1003 vcs_remove_sysfs(currcons
);
1004 vc
->vc_sw
->con_deinit(vc
);
1005 put_pid(vc
->vt_pid
);
1006 module_put(vc
->vc_sw
->owner
);
1007 kfree(vc
->vc_screenbuf
);
1008 vc_cons
[currcons
].d
= NULL
;
1017 #define set_kbd(vc, x) vt_set_kbd_mode_bit((vc)->vc_num, (x))
1018 #define clr_kbd(vc, x) vt_clr_kbd_mode_bit((vc)->vc_num, (x))
1019 #define is_kbd(vc, x) vt_get_kbd_mode_bit((vc)->vc_num, (x))
1021 #define decarm VC_REPEAT
1022 #define decckm VC_CKMODE
1023 #define kbdapplic VC_APPLIC
1027 * this is what the terminal answers to a ESC-Z or csi0c query.
1029 #define VT100ID "\033[?1;2c"
1030 #define VT102ID "\033[?6c"
1032 unsigned char color_table
[] = { 0, 4, 2, 6, 1, 5, 3, 7,
1033 8,12,10,14, 9,13,11,15 };
1035 /* the default colour table, for VGA+ colour systems */
1036 int default_red
[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
1037 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
1038 int default_grn
[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
1039 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
1040 int default_blu
[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
1041 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
1043 module_param_array(default_red
, int, NULL
, S_IRUGO
| S_IWUSR
);
1044 module_param_array(default_grn
, int, NULL
, S_IRUGO
| S_IWUSR
);
1045 module_param_array(default_blu
, int, NULL
, S_IRUGO
| S_IWUSR
);
1048 * gotoxy() must verify all boundaries, because the arguments
1049 * might also be negative. If the given position is out of
1050 * bounds, the cursor is placed at the nearest margin.
1052 static void gotoxy(struct vc_data
*vc
, int new_x
, int new_y
)
1059 if (new_x
>= vc
->vc_cols
)
1060 vc
->vc_x
= vc
->vc_cols
- 1;
1067 max_y
= vc
->vc_bottom
;
1070 max_y
= vc
->vc_rows
;
1074 else if (new_y
>= max_y
)
1075 vc
->vc_y
= max_y
- 1;
1078 vc
->vc_pos
= vc
->vc_origin
+ vc
->vc_y
* vc
->vc_size_row
+ (vc
->vc_x
<<1);
1079 vc
->vc_need_wrap
= 0;
1082 /* for absolute user moves, when decom is set */
1083 static void gotoxay(struct vc_data
*vc
, int new_x
, int new_y
)
1085 gotoxy(vc
, new_x
, vc
->vc_decom
? (vc
->vc_top
+ new_y
) : new_y
);
1088 void scrollback(struct vc_data
*vc
, int lines
)
1091 lines
= vc
->vc_rows
/ 2;
1092 scrolldelta(-lines
);
1095 void scrollfront(struct vc_data
*vc
, int lines
)
1098 lines
= vc
->vc_rows
/ 2;
1102 static void lf(struct vc_data
*vc
)
1104 /* don't scroll if above bottom of scrolling region, or
1105 * if below scrolling region
1107 if (vc
->vc_y
+ 1 == vc
->vc_bottom
)
1108 scrup(vc
, vc
->vc_top
, vc
->vc_bottom
, 1);
1109 else if (vc
->vc_y
< vc
->vc_rows
- 1) {
1111 vc
->vc_pos
+= vc
->vc_size_row
;
1113 vc
->vc_need_wrap
= 0;
1114 notify_write(vc
, '\n');
1117 static void ri(struct vc_data
*vc
)
1119 /* don't scroll if below top of scrolling region, or
1120 * if above scrolling region
1122 if (vc
->vc_y
== vc
->vc_top
)
1123 scrdown(vc
, vc
->vc_top
, vc
->vc_bottom
, 1);
1124 else if (vc
->vc_y
> 0) {
1126 vc
->vc_pos
-= vc
->vc_size_row
;
1128 vc
->vc_need_wrap
= 0;
1131 static inline void cr(struct vc_data
*vc
)
1133 vc
->vc_pos
-= vc
->vc_x
<< 1;
1134 vc
->vc_need_wrap
= vc
->vc_x
= 0;
1135 notify_write(vc
, '\r');
1138 static inline void bs(struct vc_data
*vc
)
1143 vc
->vc_need_wrap
= 0;
1144 notify_write(vc
, '\b');
1148 static inline void del(struct vc_data
*vc
)
1153 static void csi_J(struct vc_data
*vc
, int vpar
)
1156 unsigned short * start
;
1159 case 0: /* erase from cursor to end of display */
1160 count
= (vc
->vc_scr_end
- vc
->vc_pos
) >> 1;
1161 start
= (unsigned short *)vc
->vc_pos
;
1163 case 1: /* erase from start to cursor */
1164 count
= ((vc
->vc_pos
- vc
->vc_origin
) >> 1) + 1;
1165 start
= (unsigned short *)vc
->vc_origin
;
1167 case 3: /* erase scroll-back buffer (and whole display) */
1168 scr_memsetw(vc
->vc_screenbuf
, vc
->vc_video_erase_char
,
1169 vc
->vc_screenbuf_size
>> 1);
1171 if (CON_IS_VISIBLE(vc
))
1174 case 2: /* erase whole display */
1175 count
= vc
->vc_cols
* vc
->vc_rows
;
1176 start
= (unsigned short *)vc
->vc_origin
;
1181 scr_memsetw(start
, vc
->vc_video_erase_char
, 2 * count
);
1183 do_update_region(vc
, (unsigned long) start
, count
);
1184 vc
->vc_need_wrap
= 0;
1187 static void csi_K(struct vc_data
*vc
, int vpar
)
1190 unsigned short * start
;
1193 case 0: /* erase from cursor to end of line */
1194 count
= vc
->vc_cols
- vc
->vc_x
;
1195 start
= (unsigned short *)vc
->vc_pos
;
1197 case 1: /* erase from start of line to cursor */
1198 start
= (unsigned short *)(vc
->vc_pos
- (vc
->vc_x
<< 1));
1199 count
= vc
->vc_x
+ 1;
1201 case 2: /* erase whole line */
1202 start
= (unsigned short *)(vc
->vc_pos
- (vc
->vc_x
<< 1));
1203 count
= vc
->vc_cols
;
1208 scr_memsetw(start
, vc
->vc_video_erase_char
, 2 * count
);
1209 vc
->vc_need_wrap
= 0;
1211 do_update_region(vc
, (unsigned long) start
, count
);
1214 static void csi_X(struct vc_data
*vc
, int vpar
) /* erase the following vpar positions */
1220 count
= (vpar
> vc
->vc_cols
- vc
->vc_x
) ? (vc
->vc_cols
- vc
->vc_x
) : vpar
;
1222 scr_memsetw((unsigned short *)vc
->vc_pos
, vc
->vc_video_erase_char
, 2 * count
);
1224 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, vc
->vc_x
, 1, count
);
1225 vc
->vc_need_wrap
= 0;
1228 static void default_attr(struct vc_data
*vc
)
1230 vc
->vc_intensity
= 1;
1232 vc
->vc_underline
= 0;
1235 vc
->vc_color
= vc
->vc_def_color
;
1238 struct rgb
{ u8 r
; u8 g
; u8 b
; };
1240 struct rgb
rgb_from_256(int i
)
1243 if (i
< 8) { /* Standard colours. */
1244 c
.r
= i
&1 ? 0xaa : 0x00;
1245 c
.g
= i
&2 ? 0xaa : 0x00;
1246 c
.b
= i
&4 ? 0xaa : 0x00;
1247 } else if (i
< 16) {
1248 c
.r
= i
&1 ? 0xff : 0x55;
1249 c
.g
= i
&2 ? 0xff : 0x55;
1250 c
.b
= i
&4 ? 0xff : 0x55;
1251 } else if (i
< 232) { /* 6x6x6 colour cube. */
1252 c
.r
= (i
- 16) / 36 * 85 / 2;
1253 c
.g
= (i
- 16) / 6 % 6 * 85 / 2;
1254 c
.b
= (i
- 16) % 6 * 85 / 2;
1255 } else /* Grayscale ramp. */
1256 c
.r
= c
.g
= c
.b
= i
* 10 - 2312;
1260 static void rgb_foreground(struct vc_data
*vc
, struct rgb c
)
1267 hue
= (c
.r
> max
/2 ? 4 : 0)
1268 | (c
.g
> max
/2 ? 2 : 0)
1269 | (c
.b
> max
/2 ? 1 : 0);
1270 if (hue
== 7 && max
<= 0x55)
1271 hue
= 0, vc
->vc_intensity
= 2;
1273 vc
->vc_intensity
= (max
> 0xaa) + 1;
1274 vc
->vc_color
= (vc
->vc_color
& 0xf0) | hue
;
1277 static void rgb_background(struct vc_data
*vc
, struct rgb c
)
1279 /* For backgrounds, err on the dark side. */
1280 vc
->vc_color
= (vc
->vc_color
& 0x0f)
1281 | (c
.r
&0x80) >> 1 | (c
.g
&0x80) >> 2 | (c
.b
&0x80) >> 3;
1284 /* console_lock is held */
1285 static void csi_m(struct vc_data
*vc
)
1289 for (i
= 0; i
<= vc
->vc_npar
; i
++)
1290 switch (vc
->vc_par
[i
]) {
1291 case 0: /* all attributes off */
1295 vc
->vc_intensity
= 2;
1298 vc
->vc_intensity
= 0;
1304 vc
->vc_underline
= 1;
1312 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1313 * Select primary font, don't display
1314 * control chars if defined, don't set
1317 vc
->vc_translate
= set_translate(vc
->vc_charset
== 0
1319 : vc
->vc_G1_charset
, vc
);
1320 vc
->vc_disp_ctrl
= 0;
1321 vc
->vc_toggle_meta
= 0;
1323 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1324 * Select first alternate font, lets
1325 * chars < 32 be displayed as ROM chars.
1327 vc
->vc_translate
= set_translate(IBMPC_MAP
, vc
);
1328 vc
->vc_disp_ctrl
= 1;
1329 vc
->vc_toggle_meta
= 0;
1331 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1332 * Select second alternate font, toggle
1333 * high bit before displaying as ROM char.
1335 vc
->vc_translate
= set_translate(IBMPC_MAP
, vc
);
1336 vc
->vc_disp_ctrl
= 1;
1337 vc
->vc_toggle_meta
= 1;
1341 vc
->vc_intensity
= 1;
1347 vc
->vc_underline
= 0;
1355 case 38: /* ITU T.416
1356 * Higher colour modes.
1357 * They break the usual properties of SGR codes
1358 * and thus need to be detected and ignored by
1359 * hand. Strictly speaking, that standard also
1360 * wants : rather than ; as separators, contrary
1361 * to ECMA-48, but no one produces such codes
1362 * and almost no one accepts them.
1365 if (i
> vc
->vc_npar
)
1367 if (vc
->vc_par
[i
] == 5 && /* 256 colours */
1368 i
< vc
->vc_npar
) { /* ubiquitous */
1371 rgb_from_256(vc
->vc_par
[i
]));
1372 } else if (vc
->vc_par
[i
] == 2 && /* 24 bit */
1373 i
<= vc
->vc_npar
+ 3) {/* extremely rare */
1375 .r
= vc
->vc_par
[i
+ 1],
1376 .g
= vc
->vc_par
[i
+ 2],
1377 .b
= vc
->vc_par
[i
+ 3],
1379 rgb_foreground(vc
, c
);
1382 /* Subcommands 3 (CMY) and 4 (CMYK) are so insane
1383 * there's no point in supporting them.
1388 if (i
> vc
->vc_npar
)
1390 if (vc
->vc_par
[i
] == 5 && /* 256 colours */
1394 rgb_from_256(vc
->vc_par
[i
]));
1395 } else if (vc
->vc_par
[i
] == 2 && /* 24 bit */
1396 i
<= vc
->vc_npar
+ 3) {
1398 .r
= vc
->vc_par
[i
+ 1],
1399 .g
= vc
->vc_par
[i
+ 2],
1400 .b
= vc
->vc_par
[i
+ 3],
1402 rgb_background(vc
, c
);
1407 vc
->vc_color
= (vc
->vc_def_color
& 0x0f) | (vc
->vc_color
& 0xf0);
1410 vc
->vc_color
= (vc
->vc_def_color
& 0xf0) | (vc
->vc_color
& 0x0f);
1413 if (vc
->vc_par
[i
] >= 30 && vc
->vc_par
[i
] <= 37)
1414 vc
->vc_color
= color_table
[vc
->vc_par
[i
] - 30]
1415 | (vc
->vc_color
& 0xf0);
1416 else if (vc
->vc_par
[i
] >= 40 && vc
->vc_par
[i
] <= 47)
1417 vc
->vc_color
= (color_table
[vc
->vc_par
[i
] - 40] << 4)
1418 | (vc
->vc_color
& 0x0f);
1424 static void respond_string(const char *p
, struct tty_port
*port
)
1427 tty_insert_flip_char(port
, *p
, 0);
1430 tty_schedule_flip(port
);
1433 static void cursor_report(struct vc_data
*vc
, struct tty_struct
*tty
)
1437 sprintf(buf
, "\033[%d;%dR", vc
->vc_y
+ (vc
->vc_decom
? vc
->vc_top
+ 1 : 1), vc
->vc_x
+ 1);
1438 respond_string(buf
, tty
->port
);
1441 static inline void status_report(struct tty_struct
*tty
)
1443 respond_string("\033[0n", tty
->port
); /* Terminal ok */
1446 static inline void respond_ID(struct tty_struct
*tty
)
1448 respond_string(VT102ID
, tty
->port
);
1451 void mouse_report(struct tty_struct
*tty
, int butt
, int mrx
, int mry
)
1455 sprintf(buf
, "\033[M%c%c%c", (char)(' ' + butt
), (char)('!' + mrx
),
1457 respond_string(buf
, tty
->port
);
1460 /* invoked via ioctl(TIOCLINUX) and through set_selection */
1461 int mouse_reporting(void)
1463 return vc_cons
[fg_console
].d
->vc_report_mouse
;
1466 /* console_lock is held */
1467 static void set_mode(struct vc_data
*vc
, int on_off
)
1471 for (i
= 0; i
<= vc
->vc_npar
; i
++)
1473 switch(vc
->vc_par
[i
]) { /* DEC private modes set/reset */
1474 case 1: /* Cursor keys send ^[Ox/^[[x */
1476 set_kbd(vc
, decckm
);
1478 clr_kbd(vc
, decckm
);
1480 case 3: /* 80/132 mode switch unimplemented */
1481 vc
->vc_deccolm
= on_off
;
1483 vc_resize(deccolm
? 132 : 80, vc
->vc_rows
);
1484 /* this alone does not suffice; some user mode
1485 utility has to change the hardware regs */
1488 case 5: /* Inverted screen on/off */
1489 if (vc
->vc_decscnm
!= on_off
) {
1490 vc
->vc_decscnm
= on_off
;
1491 invert_screen(vc
, 0, vc
->vc_screenbuf_size
, 0);
1495 case 6: /* Origin relative/absolute */
1496 vc
->vc_decom
= on_off
;
1499 case 7: /* Autowrap on/off */
1500 vc
->vc_decawm
= on_off
;
1502 case 8: /* Autorepeat on/off */
1504 set_kbd(vc
, decarm
);
1506 clr_kbd(vc
, decarm
);
1509 vc
->vc_report_mouse
= on_off
? 1 : 0;
1511 case 25: /* Cursor on/off */
1512 vc
->vc_deccm
= on_off
;
1515 vc
->vc_report_mouse
= on_off
? 2 : 0;
1519 switch(vc
->vc_par
[i
]) { /* ANSI modes set/reset */
1520 case 3: /* Monitor (display ctrls) */
1521 vc
->vc_disp_ctrl
= on_off
;
1523 case 4: /* Insert Mode on/off */
1524 vc
->vc_decim
= on_off
;
1526 case 20: /* Lf, Enter == CrLf/Lf */
1536 /* console_lock is held */
1537 static void setterm_command(struct vc_data
*vc
)
1539 switch(vc
->vc_par
[0]) {
1540 case 1: /* set color for underline mode */
1541 if (vc
->vc_can_do_color
&&
1542 vc
->vc_par
[1] < 16) {
1543 vc
->vc_ulcolor
= color_table
[vc
->vc_par
[1]];
1544 if (vc
->vc_underline
)
1548 case 2: /* set color for half intensity mode */
1549 if (vc
->vc_can_do_color
&&
1550 vc
->vc_par
[1] < 16) {
1551 vc
->vc_halfcolor
= color_table
[vc
->vc_par
[1]];
1552 if (vc
->vc_intensity
== 0)
1556 case 8: /* store colors as defaults */
1557 vc
->vc_def_color
= vc
->vc_attr
;
1558 if (vc
->vc_hi_font_mask
== 0x100)
1559 vc
->vc_def_color
>>= 1;
1563 case 9: /* set blanking interval */
1564 blankinterval
= ((vc
->vc_par
[1] < 60) ? vc
->vc_par
[1] : 60) * 60;
1565 poke_blanked_console();
1567 case 10: /* set bell frequency in Hz */
1568 if (vc
->vc_npar
>= 1)
1569 vc
->vc_bell_pitch
= vc
->vc_par
[1];
1571 vc
->vc_bell_pitch
= DEFAULT_BELL_PITCH
;
1573 case 11: /* set bell duration in msec */
1574 if (vc
->vc_npar
>= 1)
1575 vc
->vc_bell_duration
= (vc
->vc_par
[1] < 2000) ?
1576 vc
->vc_par
[1] * HZ
/ 1000 : 0;
1578 vc
->vc_bell_duration
= DEFAULT_BELL_DURATION
;
1580 case 12: /* bring specified console to the front */
1581 if (vc
->vc_par
[1] >= 1 && vc_cons_allocated(vc
->vc_par
[1] - 1))
1582 set_console(vc
->vc_par
[1] - 1);
1584 case 13: /* unblank the screen */
1585 poke_blanked_console();
1587 case 14: /* set vesa powerdown interval */
1588 vesa_off_interval
= ((vc
->vc_par
[1] < 60) ? vc
->vc_par
[1] : 60) * 60 * HZ
;
1590 case 15: /* activate the previous console */
1591 set_console(last_console
);
1596 /* console_lock is held */
1597 static void csi_at(struct vc_data
*vc
, unsigned int nr
)
1599 if (nr
> vc
->vc_cols
- vc
->vc_x
)
1600 nr
= vc
->vc_cols
- vc
->vc_x
;
1603 insert_char(vc
, nr
);
1606 /* console_lock is held */
1607 static void csi_L(struct vc_data
*vc
, unsigned int nr
)
1609 if (nr
> vc
->vc_rows
- vc
->vc_y
)
1610 nr
= vc
->vc_rows
- vc
->vc_y
;
1613 scrdown(vc
, vc
->vc_y
, vc
->vc_bottom
, nr
);
1614 vc
->vc_need_wrap
= 0;
1617 /* console_lock is held */
1618 static void csi_P(struct vc_data
*vc
, unsigned int nr
)
1620 if (nr
> vc
->vc_cols
- vc
->vc_x
)
1621 nr
= vc
->vc_cols
- vc
->vc_x
;
1624 delete_char(vc
, nr
);
1627 /* console_lock is held */
1628 static void csi_M(struct vc_data
*vc
, unsigned int nr
)
1630 if (nr
> vc
->vc_rows
- vc
->vc_y
)
1631 nr
= vc
->vc_rows
- vc
->vc_y
;
1634 scrup(vc
, vc
->vc_y
, vc
->vc_bottom
, nr
);
1635 vc
->vc_need_wrap
= 0;
1638 /* console_lock is held (except via vc_init->reset_terminal */
1639 static void save_cur(struct vc_data
*vc
)
1641 vc
->vc_saved_x
= vc
->vc_x
;
1642 vc
->vc_saved_y
= vc
->vc_y
;
1643 vc
->vc_s_intensity
= vc
->vc_intensity
;
1644 vc
->vc_s_italic
= vc
->vc_italic
;
1645 vc
->vc_s_underline
= vc
->vc_underline
;
1646 vc
->vc_s_blink
= vc
->vc_blink
;
1647 vc
->vc_s_reverse
= vc
->vc_reverse
;
1648 vc
->vc_s_charset
= vc
->vc_charset
;
1649 vc
->vc_s_color
= vc
->vc_color
;
1650 vc
->vc_saved_G0
= vc
->vc_G0_charset
;
1651 vc
->vc_saved_G1
= vc
->vc_G1_charset
;
1654 /* console_lock is held */
1655 static void restore_cur(struct vc_data
*vc
)
1657 gotoxy(vc
, vc
->vc_saved_x
, vc
->vc_saved_y
);
1658 vc
->vc_intensity
= vc
->vc_s_intensity
;
1659 vc
->vc_italic
= vc
->vc_s_italic
;
1660 vc
->vc_underline
= vc
->vc_s_underline
;
1661 vc
->vc_blink
= vc
->vc_s_blink
;
1662 vc
->vc_reverse
= vc
->vc_s_reverse
;
1663 vc
->vc_charset
= vc
->vc_s_charset
;
1664 vc
->vc_color
= vc
->vc_s_color
;
1665 vc
->vc_G0_charset
= vc
->vc_saved_G0
;
1666 vc
->vc_G1_charset
= vc
->vc_saved_G1
;
1667 vc
->vc_translate
= set_translate(vc
->vc_charset
? vc
->vc_G1_charset
: vc
->vc_G0_charset
, vc
);
1669 vc
->vc_need_wrap
= 0;
1672 enum { ESnormal
, ESesc
, ESsquare
, ESgetpars
, ESfunckey
,
1673 EShash
, ESsetG0
, ESsetG1
, ESpercent
, ESignore
, ESnonstd
,
1676 /* console_lock is held (except via vc_init()) */
1677 static void reset_terminal(struct vc_data
*vc
, int do_clear
)
1680 vc
->vc_bottom
= vc
->vc_rows
;
1681 vc
->vc_state
= ESnormal
;
1683 vc
->vc_translate
= set_translate(LAT1_MAP
, vc
);
1684 vc
->vc_G0_charset
= LAT1_MAP
;
1685 vc
->vc_G1_charset
= GRAF_MAP
;
1687 vc
->vc_need_wrap
= 0;
1688 vc
->vc_report_mouse
= 0;
1689 vc
->vc_utf
= default_utf8
;
1690 vc
->vc_utf_count
= 0;
1692 vc
->vc_disp_ctrl
= 0;
1693 vc
->vc_toggle_meta
= 0;
1698 vc
->vc_deccm
= global_cursor_default
;
1701 vt_reset_keyboard(vc
->vc_num
);
1703 vc
->vc_cursor_type
= cur_default
;
1704 vc
->vc_complement_mask
= vc
->vc_s_complement_mask
;
1709 vc
->vc_tab_stop
[0] = 0x01010100;
1710 vc
->vc_tab_stop
[1] =
1711 vc
->vc_tab_stop
[2] =
1712 vc
->vc_tab_stop
[3] =
1713 vc
->vc_tab_stop
[4] =
1714 vc
->vc_tab_stop
[5] =
1715 vc
->vc_tab_stop
[6] =
1716 vc
->vc_tab_stop
[7] = 0x01010101;
1718 vc
->vc_bell_pitch
= DEFAULT_BELL_PITCH
;
1719 vc
->vc_bell_duration
= DEFAULT_BELL_DURATION
;
1727 /* console_lock is held */
1728 static void do_con_trol(struct tty_struct
*tty
, struct vc_data
*vc
, int c
)
1731 * Control characters can be used in the _middle_
1732 * of an escape sequence.
1734 if (vc
->vc_state
== ESosc
&& c
>=8 && c
<=13) /* ... except for OSC */
1740 if (vc
->vc_state
== ESosc
)
1741 vc
->vc_state
= ESnormal
;
1742 else if (vc
->vc_bell_duration
)
1743 kd_mksound(vc
->vc_bell_pitch
, vc
->vc_bell_duration
);
1749 vc
->vc_pos
-= (vc
->vc_x
<< 1);
1750 while (vc
->vc_x
< vc
->vc_cols
- 1) {
1752 if (vc
->vc_tab_stop
[vc
->vc_x
>> 5] & (1 << (vc
->vc_x
& 31)))
1755 vc
->vc_pos
+= (vc
->vc_x
<< 1);
1756 notify_write(vc
, '\t');
1758 case 10: case 11: case 12:
1760 if (!is_kbd(vc
, lnm
))
1767 vc
->vc_translate
= set_translate(vc
->vc_G1_charset
, vc
);
1768 vc
->vc_disp_ctrl
= 1;
1772 vc
->vc_translate
= set_translate(vc
->vc_G0_charset
, vc
);
1773 vc
->vc_disp_ctrl
= 0;
1776 vc
->vc_state
= ESnormal
;
1779 vc
->vc_state
= ESesc
;
1785 vc
->vc_state
= ESsquare
;
1788 switch(vc
->vc_state
) {
1790 vc
->vc_state
= ESnormal
;
1793 vc
->vc_state
= ESsquare
;
1796 vc
->vc_state
= ESnonstd
;
1799 vc
->vc_state
= ESpercent
;
1812 vc
->vc_tab_stop
[vc
->vc_x
>> 5] |= (1 << (vc
->vc_x
& 31));
1824 vc
->vc_state
= ESsetG0
;
1827 vc
->vc_state
= ESsetG1
;
1830 vc
->vc_state
= EShash
;
1833 reset_terminal(vc
, 1);
1835 case '>': /* Numeric keypad */
1836 clr_kbd(vc
, kbdapplic
);
1838 case '=': /* Appl. keypad */
1839 set_kbd(vc
, kbdapplic
);
1844 if (c
=='P') { /* palette escape sequence */
1845 for (vc
->vc_npar
= 0; vc
->vc_npar
< NPAR
; vc
->vc_npar
++)
1846 vc
->vc_par
[vc
->vc_npar
] = 0;
1848 vc
->vc_state
= ESpalette
;
1850 } else if (c
=='R') { /* reset palette */
1852 vc
->vc_state
= ESnormal
;
1853 } else if (c
>='0' && c
<='9')
1854 vc
->vc_state
= ESosc
;
1856 vc
->vc_state
= ESnormal
;
1860 vc
->vc_par
[vc
->vc_npar
++] = hex_to_bin(c
);
1861 if (vc
->vc_npar
== 7) {
1862 int i
= vc
->vc_par
[0] * 3, j
= 1;
1863 vc
->vc_palette
[i
] = 16 * vc
->vc_par
[j
++];
1864 vc
->vc_palette
[i
++] += vc
->vc_par
[j
++];
1865 vc
->vc_palette
[i
] = 16 * vc
->vc_par
[j
++];
1866 vc
->vc_palette
[i
++] += vc
->vc_par
[j
++];
1867 vc
->vc_palette
[i
] = 16 * vc
->vc_par
[j
++];
1868 vc
->vc_palette
[i
] += vc
->vc_par
[j
];
1870 vc
->vc_state
= ESnormal
;
1873 vc
->vc_state
= ESnormal
;
1876 for (vc
->vc_npar
= 0; vc
->vc_npar
< NPAR
; vc
->vc_npar
++)
1877 vc
->vc_par
[vc
->vc_npar
] = 0;
1879 vc
->vc_state
= ESgetpars
;
1880 if (c
== '[') { /* Function key */
1881 vc
->vc_state
=ESfunckey
;
1884 vc
->vc_ques
= (c
== '?');
1888 if (c
== ';' && vc
->vc_npar
< NPAR
- 1) {
1891 } else if (c
>='0' && c
<='9') {
1892 vc
->vc_par
[vc
->vc_npar
] *= 10;
1893 vc
->vc_par
[vc
->vc_npar
] += c
- '0';
1896 vc
->vc_state
= ESnormal
;
1907 vc
->vc_cursor_type
= vc
->vc_par
[0] | (vc
->vc_par
[1] << 8) | (vc
->vc_par
[2] << 16);
1909 vc
->vc_cursor_type
= cur_default
;
1917 vc
->vc_complement_mask
= vc
->vc_par
[0] << 8 | vc
->vc_par
[1];
1919 vc
->vc_complement_mask
= vc
->vc_s_complement_mask
;
1925 if (vc
->vc_par
[0] == 5)
1927 else if (vc
->vc_par
[0] == 6)
1928 cursor_report(vc
, tty
);
1940 gotoxy(vc
, vc
->vc_par
[0], vc
->vc_y
);
1945 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
- vc
->vc_par
[0]);
1950 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
+ vc
->vc_par
[0]);
1955 gotoxy(vc
, vc
->vc_x
+ vc
->vc_par
[0], vc
->vc_y
);
1960 gotoxy(vc
, vc
->vc_x
- vc
->vc_par
[0], vc
->vc_y
);
1965 gotoxy(vc
, 0, vc
->vc_y
+ vc
->vc_par
[0]);
1970 gotoxy(vc
, 0, vc
->vc_y
- vc
->vc_par
[0]);
1975 gotoxay(vc
, vc
->vc_x
,vc
->vc_par
[0]);
1982 gotoxay(vc
, vc
->vc_par
[1], vc
->vc_par
[0]);
1985 csi_J(vc
, vc
->vc_par
[0]);
1988 csi_K(vc
, vc
->vc_par
[0]);
1991 csi_L(vc
, vc
->vc_par
[0]);
1994 csi_M(vc
, vc
->vc_par
[0]);
1997 csi_P(vc
, vc
->vc_par
[0]);
2005 vc
->vc_tab_stop
[vc
->vc_x
>> 5] &= ~(1 << (vc
->vc_x
& 31));
2006 else if (vc
->vc_par
[0] == 3) {
2007 vc
->vc_tab_stop
[0] =
2008 vc
->vc_tab_stop
[1] =
2009 vc
->vc_tab_stop
[2] =
2010 vc
->vc_tab_stop
[3] =
2011 vc
->vc_tab_stop
[4] =
2012 vc
->vc_tab_stop
[5] =
2013 vc
->vc_tab_stop
[6] =
2014 vc
->vc_tab_stop
[7] = 0;
2020 case 'q': /* DECLL - but only 3 leds */
2021 /* map 0,1,2,3 to 0,1,2,4 */
2022 if (vc
->vc_par
[0] < 4)
2023 vt_set_led_state(vc
->vc_num
,
2024 (vc
->vc_par
[0] < 3) ? vc
->vc_par
[0] : 4);
2030 vc
->vc_par
[1] = vc
->vc_rows
;
2031 /* Minimum allowed region is 2 lines */
2032 if (vc
->vc_par
[0] < vc
->vc_par
[1] &&
2033 vc
->vc_par
[1] <= vc
->vc_rows
) {
2034 vc
->vc_top
= vc
->vc_par
[0] - 1;
2035 vc
->vc_bottom
= vc
->vc_par
[1];
2046 csi_X(vc
, vc
->vc_par
[0]);
2049 csi_at(vc
, vc
->vc_par
[0]);
2051 case ']': /* setterm functions */
2052 setterm_command(vc
);
2057 vc
->vc_state
= ESnormal
;
2059 case '@': /* defined in ISO 2022 */
2062 case 'G': /* prelim official escape code */
2063 case '8': /* retained for compatibility */
2069 vc
->vc_state
= ESnormal
;
2072 vc
->vc_state
= ESnormal
;
2074 /* DEC screen alignment test. kludge :-) */
2075 vc
->vc_video_erase_char
=
2076 (vc
->vc_video_erase_char
& 0xff00) | 'E';
2078 vc
->vc_video_erase_char
=
2079 (vc
->vc_video_erase_char
& 0xff00) | ' ';
2080 do_update_region(vc
, vc
->vc_origin
, vc
->vc_screenbuf_size
/ 2);
2085 vc
->vc_G0_charset
= GRAF_MAP
;
2087 vc
->vc_G0_charset
= LAT1_MAP
;
2089 vc
->vc_G0_charset
= IBMPC_MAP
;
2091 vc
->vc_G0_charset
= USER_MAP
;
2092 if (vc
->vc_charset
== 0)
2093 vc
->vc_translate
= set_translate(vc
->vc_G0_charset
, vc
);
2094 vc
->vc_state
= ESnormal
;
2098 vc
->vc_G1_charset
= GRAF_MAP
;
2100 vc
->vc_G1_charset
= LAT1_MAP
;
2102 vc
->vc_G1_charset
= IBMPC_MAP
;
2104 vc
->vc_G1_charset
= USER_MAP
;
2105 if (vc
->vc_charset
== 1)
2106 vc
->vc_translate
= set_translate(vc
->vc_G1_charset
, vc
);
2107 vc
->vc_state
= ESnormal
;
2112 vc
->vc_state
= ESnormal
;
2116 /* is_double_width() is based on the wcwidth() implementation by
2117 * Markus Kuhn -- 2007-05-26 (Unicode 5.0)
2118 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
2125 static int bisearch(uint32_t ucs
, const struct interval
*table
, int max
)
2130 if (ucs
< table
[0].first
|| ucs
> table
[max
].last
)
2132 while (max
>= min
) {
2133 mid
= (min
+ max
) / 2;
2134 if (ucs
> table
[mid
].last
)
2136 else if (ucs
< table
[mid
].first
)
2144 static int is_double_width(uint32_t ucs
)
2146 static const struct interval double_width
[] = {
2147 { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E },
2148 { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF },
2149 { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 },
2150 { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD }
2152 return bisearch(ucs
, double_width
, ARRAY_SIZE(double_width
) - 1);
2155 /* acquires console_lock */
2156 static int do_con_write(struct tty_struct
*tty
, const unsigned char *buf
, int count
)
2158 #ifdef VT_BUF_VRAM_ONLY
2159 #define FLUSH do { } while(0);
2161 #define FLUSH if (draw_x >= 0) { \
2162 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
2167 int c
, tc
, ok
, n
= 0, draw_x
= -1;
2168 unsigned int currcons
;
2169 unsigned long draw_from
= 0, draw_to
= 0;
2171 unsigned char vc_attr
;
2172 struct vt_notifier_param param
;
2176 u16 himask
, charmask
;
2184 vc
= tty
->driver_data
;
2186 printk(KERN_ERR
"vt: argh, driver_data is NULL !\n");
2191 currcons
= vc
->vc_num
;
2192 if (!vc_cons_allocated(currcons
)) {
2193 /* could this happen? */
2194 pr_warn_once("con_write: tty %d not allocated\n", currcons
+1);
2199 himask
= vc
->vc_hi_font_mask
;
2200 charmask
= himask
? 0x1ff : 0xff;
2202 /* undraw cursor first */
2208 while (!tty
->stopped
&& count
) {
2218 /* Do no translation at all in control states */
2219 if (vc
->vc_state
!= ESnormal
) {
2221 } else if (vc
->vc_utf
&& !vc
->vc_disp_ctrl
) {
2222 /* Combine UTF-8 into Unicode in vc_utf_char.
2223 * vc_utf_count is the number of continuation bytes still
2224 * expected to arrive.
2225 * vc_npar is the number of continuation bytes arrived so
2229 if ((c
& 0xc0) == 0x80) {
2230 /* Continuation byte received */
2231 static const uint32_t utf8_length_changes
[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff };
2232 if (vc
->vc_utf_count
) {
2233 vc
->vc_utf_char
= (vc
->vc_utf_char
<< 6) | (c
& 0x3f);
2235 if (--vc
->vc_utf_count
) {
2236 /* Still need some bytes */
2239 /* Got a whole character */
2240 c
= vc
->vc_utf_char
;
2241 /* Reject overlong sequences */
2242 if (c
<= utf8_length_changes
[vc
->vc_npar
- 1] ||
2243 c
> utf8_length_changes
[vc
->vc_npar
])
2246 /* Unexpected continuation byte */
2247 vc
->vc_utf_count
= 0;
2251 /* Single ASCII byte or first byte of a sequence received */
2252 if (vc
->vc_utf_count
) {
2253 /* Continuation byte expected */
2255 vc
->vc_utf_count
= 0;
2257 } else if (c
> 0x7f) {
2258 /* First byte of a multibyte sequence received */
2260 if ((c
& 0xe0) == 0xc0) {
2261 vc
->vc_utf_count
= 1;
2262 vc
->vc_utf_char
= (c
& 0x1f);
2263 } else if ((c
& 0xf0) == 0xe0) {
2264 vc
->vc_utf_count
= 2;
2265 vc
->vc_utf_char
= (c
& 0x0f);
2266 } else if ((c
& 0xf8) == 0xf0) {
2267 vc
->vc_utf_count
= 3;
2268 vc
->vc_utf_char
= (c
& 0x07);
2269 } else if ((c
& 0xfc) == 0xf8) {
2270 vc
->vc_utf_count
= 4;
2271 vc
->vc_utf_char
= (c
& 0x03);
2272 } else if ((c
& 0xfe) == 0xfc) {
2273 vc
->vc_utf_count
= 5;
2274 vc
->vc_utf_char
= (c
& 0x01);
2276 /* 254 and 255 are invalid */
2279 if (vc
->vc_utf_count
) {
2280 /* Still need some bytes */
2284 /* Nothing to do if an ASCII byte was received */
2286 /* End of UTF-8 decoding. */
2287 /* c is the received character, or U+FFFD for invalid sequences. */
2288 /* Replace invalid Unicode code points with U+FFFD too */
2289 if ((c
>= 0xd800 && c
<= 0xdfff) || c
== 0xfffe || c
== 0xffff)
2292 } else { /* no utf or alternate charset mode */
2293 tc
= vc_translate(vc
, c
);
2297 if (atomic_notifier_call_chain(&vt_notifier_list
, VT_PREWRITE
,
2298 ¶m
) == NOTIFY_STOP
)
2301 /* If the original code was a control character we
2302 * only allow a glyph to be displayed if the code is
2303 * not normally used (such as for cursor movement) or
2304 * if the disp_ctrl mode has been explicitly enabled.
2305 * Certain characters (as given by the CTRL_ALWAYS
2306 * bitmap) are always displayed as control characters,
2307 * as the console would be pretty useless without
2308 * them; to display an arbitrary font position use the
2309 * direct-to-font zone in UTF-8 mode.
2311 ok
= tc
&& (c
>= 32 ||
2312 !(vc
->vc_disp_ctrl
? (CTRL_ALWAYS
>> c
) & 1 :
2313 vc
->vc_utf
|| ((CTRL_ACTION
>> c
) & 1)))
2314 && (c
!= 127 || vc
->vc_disp_ctrl
)
2317 if (vc
->vc_state
== ESnormal
&& ok
) {
2318 if (vc
->vc_utf
&& !vc
->vc_disp_ctrl
) {
2319 if (is_double_width(c
))
2322 /* Now try to find out how to display it */
2323 tc
= conv_uni_to_pc(vc
, tc
);
2324 if (tc
& ~charmask
) {
2325 if (tc
== -1 || tc
== -2) {
2326 continue; /* nothing to display */
2328 /* Glyph not found */
2329 if ((!(vc
->vc_utf
&& !vc
->vc_disp_ctrl
) || c
< 128) && !(c
& ~charmask
)) {
2330 /* In legacy mode use the glyph we get by a 1:1 mapping.
2331 This would make absolutely no sense with Unicode in mind,
2332 but do this for ASCII characters since a font may lack
2333 Unicode mapping info and we don't want to end up with
2334 having question marks only. */
2337 /* Display U+FFFD. If it's not found, display an inverse question mark. */
2338 tc
= conv_uni_to_pc(vc
, 0xfffd);
2341 tc
= conv_uni_to_pc(vc
, '?');
2342 if (tc
< 0) tc
= '?';
2348 vc_attr
= vc
->vc_attr
;
2350 /* invert vc_attr */
2351 if (!vc
->vc_can_do_color
) {
2352 vc_attr
= (vc
->vc_attr
) ^ 0x08;
2353 } else if (vc
->vc_hi_font_mask
== 0x100) {
2354 vc_attr
= ((vc
->vc_attr
) & 0x11) | (((vc
->vc_attr
) & 0xe0) >> 4) | (((vc
->vc_attr
) & 0x0e) << 4);
2356 vc_attr
= ((vc
->vc_attr
) & 0x88) | (((vc
->vc_attr
) & 0x70) >> 4) | (((vc
->vc_attr
) & 0x07) << 4);
2362 if (vc
->vc_need_wrap
|| vc
->vc_decim
)
2364 if (vc
->vc_need_wrap
) {
2371 ((vc_attr
<< 8) & ~himask
) + ((tc
& 0x100) ? himask
: 0) + (tc
& 0xff) :
2372 (vc_attr
<< 8) + tc
,
2373 (u16
*) vc
->vc_pos
);
2374 if (DO_UPDATE(vc
) && draw_x
< 0) {
2376 draw_from
= vc
->vc_pos
;
2378 if (vc
->vc_x
== vc
->vc_cols
- 1) {
2379 vc
->vc_need_wrap
= vc
->vc_decawm
;
2380 draw_to
= vc
->vc_pos
+ 2;
2383 draw_to
= (vc
->vc_pos
+= 2);
2386 if (!--width
) break;
2388 tc
= conv_uni_to_pc(vc
, ' '); /* A space is printed in the second column */
2389 if (tc
< 0) tc
= ' ';
2391 notify_write(vc
, c
);
2402 goto rescan_last_byte
;
2407 do_con_trol(tty
, vc
, orig
);
2410 console_conditional_schedule();
2418 * This is the console switching callback.
2420 * Doing console switching in a process context allows
2421 * us to do the switches asynchronously (needed when we want
2422 * to switch due to a keyboard interrupt). Synchronization
2423 * with other console code and prevention of re-entrancy is
2424 * ensured with console_lock.
2426 static void console_callback(struct work_struct
*ignored
)
2430 if (want_console
>= 0) {
2431 if (want_console
!= fg_console
&&
2432 vc_cons_allocated(want_console
)) {
2433 hide_cursor(vc_cons
[fg_console
].d
);
2434 change_console(vc_cons
[want_console
].d
);
2435 /* we only changed when the console had already
2436 been allocated - a new console is not created
2437 in an interrupt routine */
2441 if (do_poke_blanked_console
) { /* do not unblank for a LED change */
2442 do_poke_blanked_console
= 0;
2443 poke_blanked_console();
2445 if (scrollback_delta
) {
2446 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
2448 if (vc
->vc_mode
== KD_TEXT
)
2449 vc
->vc_sw
->con_scrolldelta(vc
, scrollback_delta
);
2450 scrollback_delta
= 0;
2452 if (blank_timer_expired
) {
2454 blank_timer_expired
= 0;
2456 notify_update(vc_cons
[fg_console
].d
);
2461 int set_console(int nr
)
2463 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
2465 if (!vc_cons_allocated(nr
) || vt_dont_switch
||
2466 (vc
->vt_mode
.mode
== VT_AUTO
&& vc
->vc_mode
== KD_GRAPHICS
)) {
2469 * Console switch will fail in console_callback() or
2470 * change_console() so there is no point scheduling
2473 * Existing set_console() users don't check the return
2474 * value so this shouldn't break anything
2480 schedule_console_callback();
2485 struct tty_driver
*console_driver
;
2487 #ifdef CONFIG_VT_CONSOLE
2490 * vt_kmsg_redirect() - Sets/gets the kernel message console
2491 * @new: The new virtual terminal number or -1 if the console should stay
2494 * By default, the kernel messages are always printed on the current virtual
2495 * console. However, the user may modify that default with the
2496 * TIOCL_SETKMSGREDIRECT ioctl call.
2498 * This function sets the kernel message console to be @new. It returns the old
2499 * virtual console number. The virtual terminal number 0 (both as parameter and
2500 * return value) means no redirection (i.e. always printed on the currently
2503 * The parameter -1 means that only the current console is returned, but the
2504 * value is not modified. You may use the macro vt_get_kmsg_redirect() in that
2505 * case to make the code more understandable.
2507 * When the kernel is compiled without CONFIG_VT_CONSOLE, this function ignores
2508 * the parameter and always returns 0.
2510 int vt_kmsg_redirect(int new)
2512 static int kmsg_con
;
2515 return xchg(&kmsg_con
, new);
2521 * Console on virtual terminal
2523 * The console must be locked when we get here.
2526 static void vt_console_print(struct console
*co
, const char *b
, unsigned count
)
2528 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
2530 static DEFINE_SPINLOCK(printing_lock
);
2531 const ushort
*start
;
2536 /* console busy or not yet initialized */
2539 if (!spin_trylock(&printing_lock
))
2542 kmsg_console
= vt_get_kmsg_redirect();
2543 if (kmsg_console
&& vc_cons_allocated(kmsg_console
- 1))
2544 vc
= vc_cons
[kmsg_console
- 1].d
;
2546 /* read `x' only after setting currcons properly (otherwise
2547 the `x' macro will read the x of the foreground console). */
2550 if (!vc_cons_allocated(fg_console
)) {
2552 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2556 if (vc
->vc_mode
!= KD_TEXT
&& !vt_force_oops_output(vc
))
2559 /* undraw cursor first */
2563 start
= (ushort
*)vc
->vc_pos
;
2565 /* Contrived structure to try to emulate original need_wrap behaviour
2566 * Problems caused when we have need_wrap set on '\n' character */
2569 if (c
== 10 || c
== 13 || c
== 8 || vc
->vc_need_wrap
) {
2571 if (CON_IS_VISIBLE(vc
))
2572 vc
->vc_sw
->con_putcs(vc
, start
, cnt
, vc
->vc_y
, vc
->vc_x
);
2574 if (vc
->vc_need_wrap
)
2578 if (c
== 8) { /* backspace */
2580 start
= (ushort
*)vc
->vc_pos
;
2587 start
= (ushort
*)vc
->vc_pos
;
2589 if (c
== 10 || c
== 13)
2592 scr_writew((vc
->vc_attr
<< 8) + c
, (unsigned short *)vc
->vc_pos
);
2593 notify_write(vc
, c
);
2595 if (myx
== vc
->vc_cols
- 1) {
2596 vc
->vc_need_wrap
= 1;
2603 if (CON_IS_VISIBLE(vc
))
2604 vc
->vc_sw
->con_putcs(vc
, start
, cnt
, vc
->vc_y
, vc
->vc_x
);
2606 if (vc
->vc_x
== vc
->vc_cols
) {
2608 vc
->vc_need_wrap
= 1;
2615 spin_unlock(&printing_lock
);
2618 static struct tty_driver
*vt_console_device(struct console
*c
, int *index
)
2620 *index
= c
->index
? c
->index
-1 : fg_console
;
2621 return console_driver
;
2624 static struct console vt_console_driver
= {
2626 .write
= vt_console_print
,
2627 .device
= vt_console_device
,
2628 .unblank
= unblank_screen
,
2629 .flags
= CON_PRINTBUFFER
,
2635 * Handling of Linux-specific VC ioctls
2639 * Generally a bit racy with respect to console_lock();.
2641 * There are some functions which don't need it.
2643 * There are some functions which can sleep for arbitrary periods
2644 * (paste_selection) but we don't need the lock there anyway.
2646 * set_selection has locking, and definitely needs it
2649 int tioclinux(struct tty_struct
*tty
, unsigned long arg
)
2652 char __user
*p
= (char __user
*)arg
;
2656 if (current
->signal
->tty
!= tty
&& !capable(CAP_SYS_ADMIN
))
2658 if (get_user(type
, p
))
2666 ret
= set_selection((struct tiocl_selection __user
*)(p
+1), tty
);
2669 case TIOCL_PASTESEL
:
2670 ret
= paste_selection(tty
);
2672 case TIOCL_UNBLANKSCREEN
:
2677 case TIOCL_SELLOADLUT
:
2679 ret
= sel_loadlut(p
);
2682 case TIOCL_GETSHIFTSTATE
:
2685 * Make it possible to react to Shift+Mousebutton.
2686 * Note that 'shift_state' is an undocumented
2687 * kernel-internal variable; programs not closely
2688 * related to the kernel should not use this.
2690 data
= vt_get_shift_state();
2691 ret
= __put_user(data
, p
);
2693 case TIOCL_GETMOUSEREPORTING
:
2694 console_lock(); /* May be overkill */
2695 data
= mouse_reporting();
2697 ret
= __put_user(data
, p
);
2699 case TIOCL_SETVESABLANK
:
2701 ret
= set_vesa_blanking(p
);
2704 case TIOCL_GETKMSGREDIRECT
:
2705 data
= vt_get_kmsg_redirect();
2706 ret
= __put_user(data
, p
);
2708 case TIOCL_SETKMSGREDIRECT
:
2709 if (!capable(CAP_SYS_ADMIN
)) {
2712 if (get_user(data
, p
+1))
2715 vt_kmsg_redirect(data
);
2718 case TIOCL_GETFGCONSOLE
:
2719 /* No locking needed as this is a transiently
2720 correct return anyway if the caller hasn't
2721 disabled switching */
2724 case TIOCL_SCROLLCONSOLE
:
2725 if (get_user(lines
, (s32 __user
*)(p
+4))) {
2728 /* Need the console lock here. Note that lots
2729 of other calls need fixing before the lock
2730 is actually useful ! */
2732 scrollfront(vc_cons
[fg_console
].d
, lines
);
2737 case TIOCL_BLANKSCREEN
: /* until explicitly unblanked, not only poked */
2743 case TIOCL_BLANKEDSCREEN
:
2744 ret
= console_blanked
;
2754 * /dev/ttyN handling
2757 static int con_write(struct tty_struct
*tty
, const unsigned char *buf
, int count
)
2761 retval
= do_con_write(tty
, buf
, count
);
2762 con_flush_chars(tty
);
2767 static int con_put_char(struct tty_struct
*tty
, unsigned char ch
)
2770 return 0; /* n_r3964 calls put_char() from interrupt context */
2771 return do_con_write(tty
, &ch
, 1);
2774 static int con_write_room(struct tty_struct
*tty
)
2778 return 32768; /* No limit, really; we're not buffering */
2781 static int con_chars_in_buffer(struct tty_struct
*tty
)
2783 return 0; /* we're not buffering */
2787 * con_throttle and con_unthrottle are only used for
2788 * paste_selection(), which has to stuff in a large number of
2791 static void con_throttle(struct tty_struct
*tty
)
2795 static void con_unthrottle(struct tty_struct
*tty
)
2797 struct vc_data
*vc
= tty
->driver_data
;
2799 wake_up_interruptible(&vc
->paste_wait
);
2803 * Turn the Scroll-Lock LED on when the tty is stopped
2805 static void con_stop(struct tty_struct
*tty
)
2810 console_num
= tty
->index
;
2811 if (!vc_cons_allocated(console_num
))
2813 vt_kbd_con_stop(console_num
);
2817 * Turn the Scroll-Lock LED off when the console is started
2819 static void con_start(struct tty_struct
*tty
)
2824 console_num
= tty
->index
;
2825 if (!vc_cons_allocated(console_num
))
2827 vt_kbd_con_start(console_num
);
2830 static void con_flush_chars(struct tty_struct
*tty
)
2834 if (in_interrupt()) /* from flush_to_ldisc */
2837 /* if we race with con_close(), vt may be null */
2839 vc
= tty
->driver_data
;
2846 * Allocate the console screen memory.
2848 static int con_install(struct tty_driver
*driver
, struct tty_struct
*tty
)
2850 unsigned int currcons
= tty
->index
;
2855 ret
= vc_allocate(currcons
);
2859 vc
= vc_cons
[currcons
].d
;
2861 /* Still being freed */
2867 ret
= tty_port_install(&vc
->port
, driver
, tty
);
2871 tty
->driver_data
= vc
;
2874 if (!tty
->winsize
.ws_row
&& !tty
->winsize
.ws_col
) {
2875 tty
->winsize
.ws_row
= vc_cons
[currcons
].d
->vc_rows
;
2876 tty
->winsize
.ws_col
= vc_cons
[currcons
].d
->vc_cols
;
2879 tty
->termios
.c_iflag
|= IUTF8
;
2881 tty
->termios
.c_iflag
&= ~IUTF8
;
2887 static int con_open(struct tty_struct
*tty
, struct file
*filp
)
2889 /* everything done in install */
2894 static void con_close(struct tty_struct
*tty
, struct file
*filp
)
2896 /* Nothing to do - we defer to shutdown */
2899 static void con_shutdown(struct tty_struct
*tty
)
2901 struct vc_data
*vc
= tty
->driver_data
;
2904 vc
->port
.tty
= NULL
;
2908 static int default_color
= 7; /* white */
2909 static int default_italic_color
= 2; // green (ASCII)
2910 static int default_underline_color
= 3; // cyan (ASCII)
2911 module_param_named(color
, default_color
, int, S_IRUGO
| S_IWUSR
);
2912 module_param_named(italic
, default_italic_color
, int, S_IRUGO
| S_IWUSR
);
2913 module_param_named(underline
, default_underline_color
, int, S_IRUGO
| S_IWUSR
);
2915 static void vc_init(struct vc_data
*vc
, unsigned int rows
,
2916 unsigned int cols
, int do_clear
)
2922 vc
->vc_size_row
= cols
<< 1;
2923 vc
->vc_screenbuf_size
= vc
->vc_rows
* vc
->vc_size_row
;
2926 vc
->vc_pos
= vc
->vc_origin
;
2928 for (j
=k
=0; j
<16; j
++) {
2929 vc
->vc_palette
[k
++] = default_red
[j
] ;
2930 vc
->vc_palette
[k
++] = default_grn
[j
] ;
2931 vc
->vc_palette
[k
++] = default_blu
[j
] ;
2933 vc
->vc_def_color
= default_color
;
2934 vc
->vc_ulcolor
= default_underline_color
;
2935 vc
->vc_itcolor
= default_italic_color
;
2936 vc
->vc_halfcolor
= 0x08; /* grey */
2937 init_waitqueue_head(&vc
->paste_wait
);
2938 reset_terminal(vc
, do_clear
);
2942 * This routine initializes console interrupts, and does nothing
2943 * else. If you want the screen to clear, call tty_write with
2944 * the appropriate escape-sequence.
2947 static int __init
con_init(void)
2949 const char *display_desc
= NULL
;
2951 unsigned int currcons
= 0, i
;
2956 display_desc
= conswitchp
->con_startup();
2957 if (!display_desc
) {
2963 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
2964 struct con_driver
*con_driver
= ®istered_con_driver
[i
];
2966 if (con_driver
->con
== NULL
) {
2967 con_driver
->con
= conswitchp
;
2968 con_driver
->desc
= display_desc
;
2969 con_driver
->flag
= CON_DRIVER_FLAG_INIT
;
2970 con_driver
->first
= 0;
2971 con_driver
->last
= MAX_NR_CONSOLES
- 1;
2976 for (i
= 0; i
< MAX_NR_CONSOLES
; i
++)
2977 con_driver_map
[i
] = conswitchp
;
2979 if (blankinterval
) {
2980 blank_state
= blank_normal_wait
;
2981 mod_timer(&console_timer
, jiffies
+ (blankinterval
* HZ
));
2984 for (currcons
= 0; currcons
< MIN_NR_CONSOLES
; currcons
++) {
2985 vc_cons
[currcons
].d
= vc
= kzalloc(sizeof(struct vc_data
), GFP_NOWAIT
);
2986 INIT_WORK(&vc_cons
[currcons
].SAK_work
, vc_SAK
);
2987 tty_port_init(&vc
->port
);
2988 visual_init(vc
, currcons
, 1);
2989 vc
->vc_screenbuf
= kzalloc(vc
->vc_screenbuf_size
, GFP_NOWAIT
);
2990 vc_init(vc
, vc
->vc_rows
, vc
->vc_cols
,
2991 currcons
|| !vc
->vc_sw
->con_save_screen
);
2993 currcons
= fg_console
= 0;
2994 master_display_fg
= vc
= vc_cons
[currcons
].d
;
2997 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
);
3000 pr_info("Console: %s %s %dx%d\n",
3001 vc
->vc_can_do_color
? "colour" : "mono",
3002 display_desc
, vc
->vc_cols
, vc
->vc_rows
);
3007 #ifdef CONFIG_VT_CONSOLE
3008 register_console(&vt_console_driver
);
3012 console_initcall(con_init
);
3014 static const struct tty_operations con_ops
= {
3015 .install
= con_install
,
3019 .write_room
= con_write_room
,
3020 .put_char
= con_put_char
,
3021 .flush_chars
= con_flush_chars
,
3022 .chars_in_buffer
= con_chars_in_buffer
,
3024 #ifdef CONFIG_COMPAT
3025 .compat_ioctl
= vt_compat_ioctl
,
3029 .throttle
= con_throttle
,
3030 .unthrottle
= con_unthrottle
,
3031 .resize
= vt_resize
,
3032 .shutdown
= con_shutdown
3035 static struct cdev vc0_cdev
;
3037 static ssize_t
show_tty_active(struct device
*dev
,
3038 struct device_attribute
*attr
, char *buf
)
3040 return sprintf(buf
, "tty%d\n", fg_console
+ 1);
3042 static DEVICE_ATTR(active
, S_IRUGO
, show_tty_active
, NULL
);
3044 int __init
vty_init(const struct file_operations
*console_fops
)
3046 cdev_init(&vc0_cdev
, console_fops
);
3047 if (cdev_add(&vc0_cdev
, MKDEV(TTY_MAJOR
, 0), 1) ||
3048 register_chrdev_region(MKDEV(TTY_MAJOR
, 0), 1, "/dev/vc/0") < 0)
3049 panic("Couldn't register /dev/tty0 driver\n");
3050 tty0dev
= device_create(tty_class
, NULL
, MKDEV(TTY_MAJOR
, 0), NULL
, "tty0");
3051 if (IS_ERR(tty0dev
))
3054 WARN_ON(device_create_file(tty0dev
, &dev_attr_active
) < 0);
3058 console_driver
= alloc_tty_driver(MAX_NR_CONSOLES
);
3059 if (!console_driver
)
3060 panic("Couldn't allocate console driver\n");
3062 console_driver
->name
= "tty";
3063 console_driver
->name_base
= 1;
3064 console_driver
->major
= TTY_MAJOR
;
3065 console_driver
->minor_start
= 1;
3066 console_driver
->type
= TTY_DRIVER_TYPE_CONSOLE
;
3067 console_driver
->init_termios
= tty_std_termios
;
3069 console_driver
->init_termios
.c_iflag
|= IUTF8
;
3070 console_driver
->flags
= TTY_DRIVER_REAL_RAW
| TTY_DRIVER_RESET_TERMIOS
;
3071 tty_set_operations(console_driver
, &con_ops
);
3072 if (tty_register_driver(console_driver
))
3073 panic("Couldn't register console driver\n");
3076 #ifdef CONFIG_MDA_CONSOLE
3082 #ifndef VT_SINGLE_DRIVER
3084 static struct class *vtconsole_class
;
3086 static int do_bind_con_driver(const struct consw
*csw
, int first
, int last
,
3089 struct module
*owner
= csw
->owner
;
3090 const char *desc
= NULL
;
3091 struct con_driver
*con_driver
;
3092 int i
, j
= -1, k
= -1, retval
= -ENODEV
;
3094 if (!try_module_get(owner
))
3097 WARN_CONSOLE_UNLOCKED();
3099 /* check if driver is registered */
3100 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3101 con_driver
= ®istered_con_driver
[i
];
3103 if (con_driver
->con
== csw
) {
3104 desc
= con_driver
->desc
;
3113 if (!(con_driver
->flag
& CON_DRIVER_FLAG_INIT
)) {
3115 con_driver
->flag
|= CON_DRIVER_FLAG_INIT
;
3120 module_put(conswitchp
->owner
);
3122 __module_get(owner
);
3126 first
= max(first
, con_driver
->first
);
3127 last
= min(last
, con_driver
->last
);
3129 for (i
= first
; i
<= last
; i
++) {
3131 struct vc_data
*vc
= vc_cons
[i
].d
;
3133 if (con_driver_map
[i
])
3134 module_put(con_driver_map
[i
]->owner
);
3135 __module_get(owner
);
3136 con_driver_map
[i
] = csw
;
3138 if (!vc
|| !vc
->vc_sw
)
3143 if (CON_IS_VISIBLE(vc
)) {
3148 old_was_color
= vc
->vc_can_do_color
;
3149 vc
->vc_sw
->con_deinit(vc
);
3150 vc
->vc_origin
= (unsigned long)vc
->vc_screenbuf
;
3151 visual_init(vc
, i
, 0);
3155 /* If the console changed between mono <-> color, then
3156 * the attributes in the screenbuf will be wrong. The
3157 * following resets all attributes to something sane.
3159 if (old_was_color
!= vc
->vc_can_do_color
)
3160 clear_buffer_attributes(vc
);
3163 pr_info("Console: switching ");
3165 printk("consoles %d-%d ", first
+1, last
+1);
3167 struct vc_data
*vc
= vc_cons
[j
].d
;
3169 printk("to %s %s %dx%d\n",
3170 vc
->vc_can_do_color
? "colour" : "mono",
3171 desc
, vc
->vc_cols
, vc
->vc_rows
);
3178 printk("to %s\n", desc
);
3187 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
3188 static int con_is_graphics(const struct consw
*csw
, int first
, int last
)
3192 for (i
= first
; i
<= last
; i
++) {
3193 struct vc_data
*vc
= vc_cons
[i
].d
;
3195 if (vc
&& vc
->vc_mode
== KD_GRAPHICS
) {
3204 /* unlocked version of unbind_con_driver() */
3205 int do_unbind_con_driver(const struct consw
*csw
, int first
, int last
, int deflt
)
3207 struct module
*owner
= csw
->owner
;
3208 const struct consw
*defcsw
= NULL
;
3209 struct con_driver
*con_driver
= NULL
, *con_back
= NULL
;
3210 int i
, retval
= -ENODEV
;
3212 if (!try_module_get(owner
))
3215 WARN_CONSOLE_UNLOCKED();
3217 /* check if driver is registered and if it is unbindable */
3218 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3219 con_driver
= ®istered_con_driver
[i
];
3221 if (con_driver
->con
== csw
&&
3222 con_driver
->flag
& CON_DRIVER_FLAG_MODULE
) {
3233 /* check if backup driver exists */
3234 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3235 con_back
= ®istered_con_driver
[i
];
3237 if (con_back
->con
&& con_back
->con
!= csw
) {
3238 defcsw
= con_back
->con
;
3247 if (!con_is_bound(csw
))
3250 first
= max(first
, con_driver
->first
);
3251 last
= min(last
, con_driver
->last
);
3253 for (i
= first
; i
<= last
; i
++) {
3254 if (con_driver_map
[i
] == csw
) {
3255 module_put(csw
->owner
);
3256 con_driver_map
[i
] = NULL
;
3260 if (!con_is_bound(defcsw
)) {
3261 const struct consw
*defconsw
= conswitchp
;
3263 defcsw
->con_startup();
3264 con_back
->flag
|= CON_DRIVER_FLAG_INIT
;
3266 * vgacon may change the default driver to point
3267 * to dummycon, we restore it here...
3269 conswitchp
= defconsw
;
3272 if (!con_is_bound(csw
))
3273 con_driver
->flag
&= ~CON_DRIVER_FLAG_INIT
;
3275 /* ignore return value, binding should not fail */
3276 do_bind_con_driver(defcsw
, first
, last
, deflt
);
3282 EXPORT_SYMBOL_GPL(do_unbind_con_driver
);
3284 static int vt_bind(struct con_driver
*con
)
3286 const struct consw
*defcsw
= NULL
, *csw
= NULL
;
3287 int i
, more
= 1, first
= -1, last
= -1, deflt
= 0;
3289 if (!con
->con
|| !(con
->flag
& CON_DRIVER_FLAG_MODULE
) ||
3290 con_is_graphics(con
->con
, con
->first
, con
->last
))
3295 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3296 struct con_driver
*con
= ®istered_con_driver
[i
];
3298 if (con
->con
&& !(con
->flag
& CON_DRIVER_FLAG_MODULE
)) {
3310 for (i
= con
->first
; i
<= con
->last
; i
++) {
3311 if (con_driver_map
[i
] == defcsw
) {
3316 } else if (first
!= -1)
3320 if (first
== 0 && last
== MAX_NR_CONSOLES
-1)
3324 do_bind_con_driver(csw
, first
, last
, deflt
);
3335 static int vt_unbind(struct con_driver
*con
)
3337 const struct consw
*csw
= NULL
;
3338 int i
, more
= 1, first
= -1, last
= -1, deflt
= 0;
3341 if (!con
->con
|| !(con
->flag
& CON_DRIVER_FLAG_MODULE
) ||
3342 con_is_graphics(con
->con
, con
->first
, con
->last
))
3350 for (i
= con
->first
; i
<= con
->last
; i
++) {
3351 if (con_driver_map
[i
] == csw
) {
3356 } else if (first
!= -1)
3360 if (first
== 0 && last
== MAX_NR_CONSOLES
-1)
3364 ret
= do_unbind_con_driver(csw
, first
, last
, deflt
);
3378 static inline int vt_bind(struct con_driver
*con
)
3382 static inline int vt_unbind(struct con_driver
*con
)
3386 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3388 static ssize_t
store_bind(struct device
*dev
, struct device_attribute
*attr
,
3389 const char *buf
, size_t count
)
3391 struct con_driver
*con
= dev_get_drvdata(dev
);
3392 int bind
= simple_strtoul(buf
, NULL
, 0);
3406 static ssize_t
show_bind(struct device
*dev
, struct device_attribute
*attr
,
3409 struct con_driver
*con
= dev_get_drvdata(dev
);
3410 int bind
= con_is_bound(con
->con
);
3412 return snprintf(buf
, PAGE_SIZE
, "%i\n", bind
);
3415 static ssize_t
show_name(struct device
*dev
, struct device_attribute
*attr
,
3418 struct con_driver
*con
= dev_get_drvdata(dev
);
3420 return snprintf(buf
, PAGE_SIZE
, "%s %s\n",
3421 (con
->flag
& CON_DRIVER_FLAG_MODULE
) ? "(M)" : "(S)",
3426 static struct device_attribute device_attrs
[] = {
3427 __ATTR(bind
, S_IRUGO
|S_IWUSR
, show_bind
, store_bind
),
3428 __ATTR(name
, S_IRUGO
, show_name
, NULL
),
3431 static int vtconsole_init_device(struct con_driver
*con
)
3436 con
->flag
|= CON_DRIVER_FLAG_ATTR
;
3437 dev_set_drvdata(con
->dev
, con
);
3438 for (i
= 0; i
< ARRAY_SIZE(device_attrs
); i
++) {
3439 error
= device_create_file(con
->dev
, &device_attrs
[i
]);
3446 device_remove_file(con
->dev
, &device_attrs
[i
]);
3447 con
->flag
&= ~CON_DRIVER_FLAG_ATTR
;
3453 static void vtconsole_deinit_device(struct con_driver
*con
)
3457 if (con
->flag
& CON_DRIVER_FLAG_ATTR
) {
3458 for (i
= 0; i
< ARRAY_SIZE(device_attrs
); i
++)
3459 device_remove_file(con
->dev
, &device_attrs
[i
]);
3460 con
->flag
&= ~CON_DRIVER_FLAG_ATTR
;
3465 * con_is_bound - checks if driver is bound to the console
3466 * @csw: console driver
3468 * RETURNS: zero if unbound, nonzero if bound
3470 * Drivers can call this and if zero, they should release
3471 * all resources allocated on con_startup()
3473 int con_is_bound(const struct consw
*csw
)
3477 for (i
= 0; i
< MAX_NR_CONSOLES
; i
++) {
3478 if (con_driver_map
[i
] == csw
) {
3486 EXPORT_SYMBOL(con_is_bound
);
3489 * con_debug_enter - prepare the console for the kernel debugger
3490 * @sw: console driver
3492 * Called when the console is taken over by the kernel debugger, this
3493 * function needs to save the current console state, then put the console
3494 * into a state suitable for the kernel debugger.
3497 * Zero on success, nonzero if a failure occurred when trying to prepare
3498 * the console for the debugger.
3500 int con_debug_enter(struct vc_data
*vc
)
3504 saved_fg_console
= fg_console
;
3505 saved_last_console
= last_console
;
3506 saved_want_console
= want_console
;
3507 saved_vc_mode
= vc
->vc_mode
;
3508 saved_console_blanked
= console_blanked
;
3509 vc
->vc_mode
= KD_TEXT
;
3510 console_blanked
= 0;
3511 if (vc
->vc_sw
->con_debug_enter
)
3512 ret
= vc
->vc_sw
->con_debug_enter(vc
);
3513 #ifdef CONFIG_KGDB_KDB
3514 /* Set the initial LINES variable if it is not already set */
3515 if (vc
->vc_rows
< 999) {
3518 const char *setargs
[3] = {
3523 if (kdbgetintenv(setargs
[0], &linecount
)) {
3524 snprintf(lns
, 4, "%i", vc
->vc_rows
);
3525 kdb_set(2, setargs
);
3528 if (vc
->vc_cols
< 999) {
3531 const char *setargs
[3] = {
3536 if (kdbgetintenv(setargs
[0], &colcount
)) {
3537 snprintf(cols
, 4, "%i", vc
->vc_cols
);
3538 kdb_set(2, setargs
);
3541 #endif /* CONFIG_KGDB_KDB */
3544 EXPORT_SYMBOL_GPL(con_debug_enter
);
3547 * con_debug_leave - restore console state
3548 * @sw: console driver
3550 * Restore the console state to what it was before the kernel debugger
3554 * Zero on success, nonzero if a failure occurred when trying to restore
3557 int con_debug_leave(void)
3562 fg_console
= saved_fg_console
;
3563 last_console
= saved_last_console
;
3564 want_console
= saved_want_console
;
3565 console_blanked
= saved_console_blanked
;
3566 vc_cons
[fg_console
].d
->vc_mode
= saved_vc_mode
;
3568 vc
= vc_cons
[fg_console
].d
;
3569 if (vc
->vc_sw
->con_debug_leave
)
3570 ret
= vc
->vc_sw
->con_debug_leave(vc
);
3573 EXPORT_SYMBOL_GPL(con_debug_leave
);
3575 static int do_register_con_driver(const struct consw
*csw
, int first
, int last
)
3577 struct module
*owner
= csw
->owner
;
3578 struct con_driver
*con_driver
;
3582 WARN_CONSOLE_UNLOCKED();
3584 if (!try_module_get(owner
))
3587 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3588 con_driver
= ®istered_con_driver
[i
];
3590 /* already registered */
3591 if (con_driver
->con
== csw
)
3598 desc
= csw
->con_startup();
3605 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3606 con_driver
= ®istered_con_driver
[i
];
3608 if (con_driver
->con
== NULL
) {
3609 con_driver
->con
= csw
;
3610 con_driver
->desc
= desc
;
3611 con_driver
->node
= i
;
3612 con_driver
->flag
= CON_DRIVER_FLAG_MODULE
|
3613 CON_DRIVER_FLAG_INIT
;
3614 con_driver
->first
= first
;
3615 con_driver
->last
= last
;
3624 con_driver
->dev
= device_create(vtconsole_class
, NULL
,
3625 MKDEV(0, con_driver
->node
),
3629 if (IS_ERR(con_driver
->dev
)) {
3630 printk(KERN_WARNING
"Unable to create device for %s; "
3631 "errno = %ld\n", con_driver
->desc
,
3632 PTR_ERR(con_driver
->dev
));
3633 con_driver
->dev
= NULL
;
3635 vtconsole_init_device(con_driver
);
3645 * do_unregister_con_driver - unregister console driver from console layer
3646 * @csw: console driver
3648 * DESCRIPTION: All drivers that registers to the console layer must
3649 * call this function upon exit, or if the console driver is in a state
3650 * where it won't be able to handle console services, such as the
3651 * framebuffer console without loaded framebuffer drivers.
3653 * The driver must unbind first prior to unregistration.
3655 int do_unregister_con_driver(const struct consw
*csw
)
3659 /* cannot unregister a bound driver */
3660 if (con_is_bound(csw
))
3663 if (csw
== conswitchp
)
3666 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3667 struct con_driver
*con_driver
= ®istered_con_driver
[i
];
3669 if (con_driver
->con
== csw
) {
3670 vtconsole_deinit_device(con_driver
);
3671 device_destroy(vtconsole_class
,
3672 MKDEV(0, con_driver
->node
));
3673 con_driver
->con
= NULL
;
3674 con_driver
->desc
= NULL
;
3675 con_driver
->dev
= NULL
;
3676 con_driver
->node
= 0;
3677 con_driver
->flag
= 0;
3678 con_driver
->first
= 0;
3679 con_driver
->last
= 0;
3686 EXPORT_SYMBOL_GPL(do_unregister_con_driver
);
3689 * If we support more console drivers, this function is used
3690 * when a driver wants to take over some existing consoles
3691 * and become default driver for newly opened ones.
3693 * do_take_over_console is basically a register followed by unbind
3695 int do_take_over_console(const struct consw
*csw
, int first
, int last
, int deflt
)
3699 err
= do_register_con_driver(csw
, first
, last
);
3701 * If we get an busy error we still want to bind the console driver
3702 * and return success, as we may have unbound the console driver
3703 * but not unregistered it.
3708 do_bind_con_driver(csw
, first
, last
, deflt
);
3712 EXPORT_SYMBOL_GPL(do_take_over_console
);
3716 * give_up_console is a wrapper to unregister_con_driver. It will only
3717 * work if driver is fully unbound.
3719 void give_up_console(const struct consw
*csw
)
3722 do_unregister_con_driver(csw
);
3726 static int __init
vtconsole_class_init(void)
3730 vtconsole_class
= class_create(THIS_MODULE
, "vtconsole");
3731 if (IS_ERR(vtconsole_class
)) {
3732 printk(KERN_WARNING
"Unable to create vt console class; "
3733 "errno = %ld\n", PTR_ERR(vtconsole_class
));
3734 vtconsole_class
= NULL
;
3737 /* Add system drivers to sysfs */
3738 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3739 struct con_driver
*con
= ®istered_con_driver
[i
];
3741 if (con
->con
&& !con
->dev
) {
3742 con
->dev
= device_create(vtconsole_class
, NULL
,
3743 MKDEV(0, con
->node
),
3747 if (IS_ERR(con
->dev
)) {
3748 printk(KERN_WARNING
"Unable to create "
3749 "device for %s; errno = %ld\n",
3750 con
->desc
, PTR_ERR(con
->dev
));
3753 vtconsole_init_device(con
);
3760 postcore_initcall(vtconsole_class_init
);
3768 static int set_vesa_blanking(char __user
*p
)
3772 if (get_user(mode
, p
+ 1))
3775 vesa_blank_mode
= (mode
< 4) ? mode
: 0;
3779 void do_blank_screen(int entering_gfx
)
3781 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
3784 WARN_CONSOLE_UNLOCKED();
3786 if (console_blanked
) {
3787 if (blank_state
== blank_vesa_wait
) {
3788 blank_state
= blank_off
;
3789 vc
->vc_sw
->con_blank(vc
, vesa_blank_mode
+ 1, 0);
3794 /* entering graphics mode? */
3798 vc
->vc_sw
->con_blank(vc
, -1, 1);
3799 console_blanked
= fg_console
+ 1;
3800 blank_state
= blank_off
;
3805 if (blank_state
!= blank_normal_wait
)
3807 blank_state
= blank_off
;
3809 /* don't blank graphics */
3810 if (vc
->vc_mode
!= KD_TEXT
) {
3811 console_blanked
= fg_console
+ 1;
3816 del_timer_sync(&console_timer
);
3817 blank_timer_expired
= 0;
3820 /* In case we need to reset origin, blanking hook returns 1 */
3821 i
= vc
->vc_sw
->con_blank(vc
, vesa_off_interval
? 1 : (vesa_blank_mode
+ 1), 0);
3822 console_blanked
= fg_console
+ 1;
3826 if (console_blank_hook
&& console_blank_hook(1))
3829 if (vesa_off_interval
&& vesa_blank_mode
) {
3830 blank_state
= blank_vesa_wait
;
3831 mod_timer(&console_timer
, jiffies
+ vesa_off_interval
);
3833 vt_event_post(VT_EVENT_BLANK
, vc
->vc_num
, vc
->vc_num
);
3835 EXPORT_SYMBOL(do_blank_screen
);
3838 * Called by timer as well as from vt_console_driver
3840 void do_unblank_screen(int leaving_gfx
)
3844 /* This should now always be called from a "sane" (read: can schedule)
3845 * context for the sake of the low level drivers, except in the special
3846 * case of oops_in_progress
3848 if (!oops_in_progress
)
3851 WARN_CONSOLE_UNLOCKED();
3854 if (!console_blanked
)
3856 if (!vc_cons_allocated(fg_console
)) {
3858 pr_warn("unblank_screen: tty %d not allocated ??\n",
3862 vc
= vc_cons
[fg_console
].d
;
3863 /* Try to unblank in oops case too */
3864 if (vc
->vc_mode
!= KD_TEXT
&& !vt_force_oops_output(vc
))
3865 return; /* but leave console_blanked != 0 */
3867 if (blankinterval
) {
3868 mod_timer(&console_timer
, jiffies
+ (blankinterval
* HZ
));
3869 blank_state
= blank_normal_wait
;
3872 console_blanked
= 0;
3873 if (vc
->vc_sw
->con_blank(vc
, 0, leaving_gfx
) || vt_force_oops_output(vc
))
3874 /* Low-level driver cannot restore -> do it ourselves */
3876 if (console_blank_hook
)
3877 console_blank_hook(0);
3880 vt_event_post(VT_EVENT_UNBLANK
, vc
->vc_num
, vc
->vc_num
);
3882 EXPORT_SYMBOL(do_unblank_screen
);
3885 * This is called by the outside world to cause a forced unblank, mostly for
3886 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
3887 * call it with 1 as an argument and so force a mode restore... that may kill
3888 * X or at least garbage the screen but would also make the Oops visible...
3890 void unblank_screen(void)
3892 do_unblank_screen(0);
3896 * We defer the timer blanking to work queue so it can take the console mutex
3897 * (console operations can still happen at irq time, but only from printk which
3898 * has the console mutex. Not perfect yet, but better than no locking
3900 static void blank_screen_t(unsigned long dummy
)
3902 if (unlikely(!keventd_up())) {
3903 mod_timer(&console_timer
, jiffies
+ (blankinterval
* HZ
));
3906 blank_timer_expired
= 1;
3907 schedule_work(&console_work
);
3910 void poke_blanked_console(void)
3912 WARN_CONSOLE_UNLOCKED();
3914 /* Add this so we quickly catch whoever might call us in a non
3915 * safe context. Nowadays, unblank_screen() isn't to be called in
3916 * atomic contexts and is allowed to schedule (with the special case
3917 * of oops_in_progress, but that isn't of any concern for this
3922 /* This isn't perfectly race free, but a race here would be mostly harmless,
3923 * at worse, we'll do a spurrious blank and it's unlikely
3925 del_timer(&console_timer
);
3926 blank_timer_expired
= 0;
3928 if (ignore_poke
|| !vc_cons
[fg_console
].d
|| vc_cons
[fg_console
].d
->vc_mode
== KD_GRAPHICS
)
3930 if (console_blanked
)
3932 else if (blankinterval
) {
3933 mod_timer(&console_timer
, jiffies
+ (blankinterval
* HZ
));
3934 blank_state
= blank_normal_wait
;
3942 static void set_palette(struct vc_data
*vc
)
3944 WARN_CONSOLE_UNLOCKED();
3946 if (vc
->vc_mode
!= KD_GRAPHICS
)
3947 vc
->vc_sw
->con_set_palette(vc
, color_table
);
3951 * Load palette into the DAC registers. arg points to a colour
3952 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
3955 int con_set_cmap(unsigned char __user
*arg
)
3958 unsigned char colormap
[3*16];
3960 if (copy_from_user(colormap
, arg
, sizeof(colormap
)))
3964 for (i
= k
= 0; i
< 16; i
++) {
3965 default_red
[i
] = colormap
[k
++];
3966 default_grn
[i
] = colormap
[k
++];
3967 default_blu
[i
] = colormap
[k
++];
3969 for (i
= 0; i
< MAX_NR_CONSOLES
; i
++) {
3970 if (!vc_cons_allocated(i
))
3972 for (j
= k
= 0; j
< 16; j
++) {
3973 vc_cons
[i
].d
->vc_palette
[k
++] = default_red
[j
];
3974 vc_cons
[i
].d
->vc_palette
[k
++] = default_grn
[j
];
3975 vc_cons
[i
].d
->vc_palette
[k
++] = default_blu
[j
];
3977 set_palette(vc_cons
[i
].d
);
3984 int con_get_cmap(unsigned char __user
*arg
)
3987 unsigned char colormap
[3*16];
3990 for (i
= k
= 0; i
< 16; i
++) {
3991 colormap
[k
++] = default_red
[i
];
3992 colormap
[k
++] = default_grn
[i
];
3993 colormap
[k
++] = default_blu
[i
];
3997 if (copy_to_user(arg
, colormap
, sizeof(colormap
)))
4003 void reset_palette(struct vc_data
*vc
)
4006 for (j
=k
=0; j
<16; j
++) {
4007 vc
->vc_palette
[k
++] = default_red
[j
];
4008 vc
->vc_palette
[k
++] = default_grn
[j
];
4009 vc
->vc_palette
[k
++] = default_blu
[j
];
4017 * Currently we only support fonts up to 32 pixels wide, at a maximum height
4018 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
4019 * depending on width) reserved for each character which is kinda wasty, but
4020 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
4021 * is up to the actual low-level console-driver convert data into its favorite
4022 * format (maybe we should add a `fontoffset' field to the `display'
4023 * structure so we won't have to convert the fontdata all the time.
4027 #define max_font_size 65536
4029 static int con_font_get(struct vc_data
*vc
, struct console_font_op
*op
)
4031 struct console_font font
;
4036 font
.data
= kmalloc(max_font_size
, GFP_KERNEL
);
4043 if (vc
->vc_mode
!= KD_TEXT
)
4045 else if (vc
->vc_sw
->con_font_get
)
4046 rc
= vc
->vc_sw
->con_font_get(vc
, &font
);
4054 c
= (font
.width
+7)/8 * 32 * font
.charcount
;
4056 if (op
->data
&& font
.charcount
> op
->charcount
)
4058 if (!(op
->flags
& KD_FONT_FLAG_OLD
)) {
4059 if (font
.width
> op
->width
|| font
.height
> op
->height
)
4062 if (font
.width
!= 8)
4064 else if ((op
->height
&& font
.height
> op
->height
) ||
4071 op
->height
= font
.height
;
4072 op
->width
= font
.width
;
4073 op
->charcount
= font
.charcount
;
4075 if (op
->data
&& copy_to_user(op
->data
, font
.data
, c
))
4083 static int con_font_set(struct vc_data
*vc
, struct console_font_op
*op
)
4085 struct console_font font
;
4089 if (vc
->vc_mode
!= KD_TEXT
)
4093 if (op
->charcount
> 512)
4095 if (!op
->height
) { /* Need to guess font height [compat] */
4097 u8 __user
*charmap
= op
->data
;
4100 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
4101 so that we can get rid of this soon */
4102 if (!(op
->flags
& KD_FONT_FLAG_OLD
))
4104 for (h
= 32; h
> 0; h
--)
4105 for (i
= 0; i
< op
->charcount
; i
++) {
4106 if (get_user(tmp
, &charmap
[32*i
+h
-1]))
4115 if (op
->width
<= 0 || op
->width
> 32 || op
->height
> 32)
4117 size
= (op
->width
+7)/8 * 32 * op
->charcount
;
4118 if (size
> max_font_size
)
4120 font
.charcount
= op
->charcount
;
4121 font
.height
= op
->height
;
4122 font
.width
= op
->width
;
4123 font
.data
= memdup_user(op
->data
, size
);
4124 if (IS_ERR(font
.data
))
4125 return PTR_ERR(font
.data
);
4127 if (vc
->vc_mode
!= KD_TEXT
)
4129 else if (vc
->vc_sw
->con_font_set
)
4130 rc
= vc
->vc_sw
->con_font_set(vc
, &font
, op
->flags
);
4138 static int con_font_default(struct vc_data
*vc
, struct console_font_op
*op
)
4140 struct console_font font
= {.width
= op
->width
, .height
= op
->height
};
4141 char name
[MAX_FONT_NAME
];
4148 else if (strncpy_from_user(name
, op
->data
, MAX_FONT_NAME
- 1) < 0)
4151 name
[MAX_FONT_NAME
- 1] = 0;
4154 if (vc
->vc_mode
!= KD_TEXT
) {
4158 if (vc
->vc_sw
->con_font_default
)
4159 rc
= vc
->vc_sw
->con_font_default(vc
, &font
, s
);
4164 op
->width
= font
.width
;
4165 op
->height
= font
.height
;
4170 static int con_font_copy(struct vc_data
*vc
, struct console_font_op
*op
)
4172 int con
= op
->height
;
4177 if (vc
->vc_mode
!= KD_TEXT
)
4179 else if (!vc
->vc_sw
->con_font_copy
)
4181 else if (con
< 0 || !vc_cons_allocated(con
))
4183 else if (con
== vc
->vc_num
) /* nothing to do */
4186 rc
= vc
->vc_sw
->con_font_copy(vc
, con
);
4191 int con_font_op(struct vc_data
*vc
, struct console_font_op
*op
)
4194 case KD_FONT_OP_SET
:
4195 return con_font_set(vc
, op
);
4196 case KD_FONT_OP_GET
:
4197 return con_font_get(vc
, op
);
4198 case KD_FONT_OP_SET_DEFAULT
:
4199 return con_font_default(vc
, op
);
4200 case KD_FONT_OP_COPY
:
4201 return con_font_copy(vc
, op
);
4207 * Interface exported to selection and vcs.
4210 /* used by selection */
4211 u16
screen_glyph(struct vc_data
*vc
, int offset
)
4213 u16 w
= scr_readw(screenpos(vc
, offset
, 1));
4216 if (w
& vc
->vc_hi_font_mask
)
4220 EXPORT_SYMBOL_GPL(screen_glyph
);
4222 /* used by vcs - note the word offset */
4223 unsigned short *screen_pos(struct vc_data
*vc
, int w_offset
, int viewed
)
4225 return screenpos(vc
, 2 * w_offset
, viewed
);
4228 void getconsxy(struct vc_data
*vc
, unsigned char *p
)
4234 void putconsxy(struct vc_data
*vc
, unsigned char *p
)
4237 gotoxy(vc
, p
[0], p
[1]);
4241 u16
vcs_scr_readw(struct vc_data
*vc
, const u16
*org
)
4243 if ((unsigned long)org
== vc
->vc_pos
&& softcursor_original
!= -1)
4244 return softcursor_original
;
4245 return scr_readw(org
);
4248 void vcs_scr_writew(struct vc_data
*vc
, u16 val
, u16
*org
)
4250 scr_writew(val
, org
);
4251 if ((unsigned long)org
== vc
->vc_pos
) {
4252 softcursor_original
= -1;
4257 void vcs_scr_updated(struct vc_data
*vc
)
4263 * Visible symbols for modules
4266 EXPORT_SYMBOL(color_table
);
4267 EXPORT_SYMBOL(default_red
);
4268 EXPORT_SYMBOL(default_grn
);
4269 EXPORT_SYMBOL(default_blu
);
4270 EXPORT_SYMBOL(update_region
);
4271 EXPORT_SYMBOL(redraw_screen
);
4272 EXPORT_SYMBOL(vc_resize
);
4273 EXPORT_SYMBOL(fg_console
);
4274 EXPORT_SYMBOL(console_blank_hook
);
4275 EXPORT_SYMBOL(console_blanked
);
4276 EXPORT_SYMBOL(vc_cons
);
4277 EXPORT_SYMBOL(global_cursor_default
);
4278 #ifndef VT_SINGLE_DRIVER
4279 EXPORT_SYMBOL(give_up_console
);