1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (C) 1991, 1992 Linus Torvalds
7 * Hopefully this will be a rather complete VT102 implementation.
9 * Beeping thanks to John T Kohl.
11 * Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics
12 * Chars, and VT100 enhancements by Peter MacDonald.
14 * Copy and paste function by Andrew Haylett,
15 * some enhancements by Alessandro Rubini.
17 * Code to check for different video-cards mostly by Galen Hunt,
18 * <g-hunt@ee.utah.edu>
20 * Rudimentary ISO 10646/Unicode/UTF-8 character set support by
21 * Markus Kuhn, <mskuhn@immd4.informatik.uni-erlangen.de>.
23 * Dynamic allocation of consoles, aeb@cwi.nl, May 1994
24 * Resizing of consoles, aeb, 940926
26 * Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94
29 * User-defined bell sound, new setterm control sequences and printk
30 * redirection by Martin Mares <mj@k332.feld.cvut.cz> 19-Nov-95
32 * APM screenblank bug fixed Takashi Manabe <manabe@roy.dsl.tutics.tut.jp>
34 * Merge with the abstract console driver by Geert Uytterhoeven
35 * <geert@linux-m68k.org>, Jan 1997.
37 * Original m68k console driver modifications by
39 * - Arno Griffioen <arno@usn.nl>
40 * - David Carter <carter@cs.bris.ac.uk>
42 * The abstract console driver provides a generic interface for a text
43 * console. It supports VGA text mode, frame buffer based graphical consoles
44 * and special graphics processors that are only accessible through some
45 * registers (e.g. a TMS340x0 GSP).
47 * The interface to the hardware is specified using a special structure
48 * (struct consw) which contains function pointers to console operations
49 * (see <linux/console.h> for more information).
51 * Support for changeable cursor shape
52 * by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997
54 * Ported to i386 and con_scrolldelta fixed
55 * by Emmanuel Marty <core@ggi-project.org>, April 1998
57 * Resurrected character buffers in videoram plus lots of other trickery
58 * by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998
60 * Removed old-style timers, introduced console_timer, made timer
61 * deletion SMP-safe. 17Jun00, Andrew Morton
63 * Removed console_lock, enabled interrupts across all console operations
64 * 13 March 2001, Andrew Morton
66 * Fixed UTF-8 mode so alternate charset modes always work according
67 * to control sequences interpreted in do_con_trol function
68 * preserving backward VT100 semigraphics compatibility,
69 * malformed UTF sequences represented as sequences of replacement glyphs,
70 * original codes or '?' as a last resort if replacement glyph is undefined
71 * by Adam Tla/lka <atlka@pg.gda.pl>, Aug 2006
74 #include <linux/module.h>
75 #include <linux/types.h>
76 #include <linux/sched/signal.h>
77 #include <linux/tty.h>
78 #include <linux/tty_flip.h>
79 #include <linux/kernel.h>
80 #include <linux/string.h>
81 #include <linux/errno.h>
83 #include <linux/slab.h>
84 #include <linux/major.h>
86 #include <linux/console.h>
87 #include <linux/init.h>
88 #include <linux/mutex.h>
89 #include <linux/vt_kern.h>
90 #include <linux/selection.h>
91 #include <linux/tiocl.h>
92 #include <linux/kbd_kern.h>
93 #include <linux/consolemap.h>
94 #include <linux/timer.h>
95 #include <linux/interrupt.h>
96 #include <linux/workqueue.h>
98 #include <linux/font.h>
99 #include <linux/bitops.h>
100 #include <linux/notifier.h>
101 #include <linux/device.h>
102 #include <linux/io.h>
103 #include <linux/uaccess.h>
104 #include <linux/kdb.h>
105 #include <linux/ctype.h>
106 #include <linux/bsearch.h>
107 #include <linux/gcd.h>
109 #define MAX_NR_CON_DRIVER 16
111 #define CON_DRIVER_FLAG_MODULE 1
112 #define CON_DRIVER_FLAG_INIT 2
113 #define CON_DRIVER_FLAG_ATTR 4
114 #define CON_DRIVER_FLAG_ZOMBIE 8
117 const struct consw
*con
;
126 static struct con_driver registered_con_driver
[MAX_NR_CON_DRIVER
];
127 const struct consw
*conswitchp
;
129 /* A bitmap for codes <32. A bit of 1 indicates that the code
130 * corresponding to that bit number invokes some special action
131 * (such as cursor movement) and should not be displayed as a
132 * glyph unless the disp_ctrl mode is explicitly enabled.
134 #define CTRL_ACTION 0x0d00ff81
135 #define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */
138 * Here is the default bell parameters: 750HZ, 1/8th of a second
140 #define DEFAULT_BELL_PITCH 750
141 #define DEFAULT_BELL_DURATION (HZ/8)
142 #define DEFAULT_CURSOR_BLINK_MS 200
144 struct vc vc_cons
[MAX_NR_CONSOLES
];
146 #ifndef VT_SINGLE_DRIVER
147 static const struct consw
*con_driver_map
[MAX_NR_CONSOLES
];
150 static int con_open(struct tty_struct
*, struct file
*);
151 static void vc_init(struct vc_data
*vc
, unsigned int rows
,
152 unsigned int cols
, int do_clear
);
153 static void gotoxy(struct vc_data
*vc
, int new_x
, int new_y
);
154 static void save_cur(struct vc_data
*vc
);
155 static void reset_terminal(struct vc_data
*vc
, int do_clear
);
156 static void con_flush_chars(struct tty_struct
*tty
);
157 static int set_vesa_blanking(char __user
*p
);
158 static void set_cursor(struct vc_data
*vc
);
159 static void hide_cursor(struct vc_data
*vc
);
160 static void console_callback(struct work_struct
*ignored
);
161 static void con_driver_unregister_callback(struct work_struct
*ignored
);
162 static void blank_screen_t(struct timer_list
*unused
);
163 static void set_palette(struct vc_data
*vc
);
165 #define vt_get_kmsg_redirect() vt_kmsg_redirect(-1)
167 static int printable
; /* Is console ready for printing? */
168 int default_utf8
= true;
169 module_param(default_utf8
, int, S_IRUGO
| S_IWUSR
);
170 int global_cursor_default
= -1;
171 module_param(global_cursor_default
, int, S_IRUGO
| S_IWUSR
);
173 static int cur_default
= CUR_DEFAULT
;
174 module_param(cur_default
, int, S_IRUGO
| S_IWUSR
);
177 * ignore_poke: don't unblank the screen when things are typed. This is
178 * mainly for the privacy of braille terminal users.
180 static int ignore_poke
;
182 int do_poke_blanked_console
;
185 static int vesa_blank_mode
; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
186 static int vesa_off_interval
;
187 static int blankinterval
;
188 core_param(consoleblank
, blankinterval
, int, 0444);
190 static DECLARE_WORK(console_work
, console_callback
);
191 static DECLARE_WORK(con_driver_unregister_work
, con_driver_unregister_callback
);
194 * fg_console is the current virtual console,
195 * last_console is the last used one,
196 * want_console is the console we want to switch to,
197 * saved_* variants are for save/restore around kernel debugger enter/leave
201 int want_console
= -1;
202 static int saved_fg_console
;
203 static int saved_last_console
;
204 static int saved_want_console
;
205 static int saved_vc_mode
;
206 static int saved_console_blanked
;
209 * For each existing display, we have a pointer to console currently visible
210 * on that display, allowing consoles other than fg_console to be refreshed
211 * appropriately. Unless the low-level driver supplies its own display_fg
212 * variable, we use this one for the "master display".
214 static struct vc_data
*master_display_fg
;
217 * Unfortunately, we need to delay tty echo when we're currently writing to the
218 * console since the code is (and always was) not re-entrant, so we schedule
219 * all flip requests to process context with schedule-task() and run it from
220 * console_callback().
224 * For the same reason, we defer scrollback to the console callback.
226 static int scrollback_delta
;
229 * Hook so that the power management routines can (un)blank
230 * the console on our behalf.
232 int (*console_blank_hook
)(int);
234 static DEFINE_TIMER(console_timer
, blank_screen_t
);
235 static int blank_state
;
236 static int blank_timer_expired
;
244 * /sys/class/tty/tty0/
246 * the attribute 'active' contains the name of the current vc
247 * console and it supports poll() to detect vc switches
249 static struct device
*tty0dev
;
252 * Notifier list for console events.
254 static ATOMIC_NOTIFIER_HEAD(vt_notifier_list
);
256 int register_vt_notifier(struct notifier_block
*nb
)
258 return atomic_notifier_chain_register(&vt_notifier_list
, nb
);
260 EXPORT_SYMBOL_GPL(register_vt_notifier
);
262 int unregister_vt_notifier(struct notifier_block
*nb
)
264 return atomic_notifier_chain_unregister(&vt_notifier_list
, nb
);
266 EXPORT_SYMBOL_GPL(unregister_vt_notifier
);
268 static void notify_write(struct vc_data
*vc
, unsigned int unicode
)
270 struct vt_notifier_param param
= { .vc
= vc
, .c
= unicode
};
271 atomic_notifier_call_chain(&vt_notifier_list
, VT_WRITE
, ¶m
);
274 static void notify_update(struct vc_data
*vc
)
276 struct vt_notifier_param param
= { .vc
= vc
};
277 atomic_notifier_call_chain(&vt_notifier_list
, VT_UPDATE
, ¶m
);
280 * Low-Level Functions
283 static inline bool con_is_fg(const struct vc_data
*vc
)
285 return vc
->vc_num
== fg_console
;
288 static inline bool con_should_update(const struct vc_data
*vc
)
290 return con_is_visible(vc
) && !console_blanked
;
293 static inline unsigned short *screenpos(struct vc_data
*vc
, int offset
, int viewed
)
298 p
= (unsigned short *)(vc
->vc_origin
+ offset
);
299 else if (!vc
->vc_sw
->con_screen_pos
)
300 p
= (unsigned short *)(vc
->vc_visible_origin
+ offset
);
302 p
= vc
->vc_sw
->con_screen_pos(vc
, offset
);
306 /* Called from the keyboard irq path.. */
307 static inline void scrolldelta(int lines
)
310 /* scrolldelta needs some kind of consistency lock, but the BKL was
311 and still is not protecting versus the scheduled back end */
312 scrollback_delta
+= lines
;
313 schedule_console_callback();
316 void schedule_console_callback(void)
318 schedule_work(&console_work
);
322 * Code to manage unicode-based screen buffers
325 #ifdef NO_VC_UNI_SCREEN
326 /* this disables and optimizes related code away at compile time */
327 #define get_vc_uniscr(vc) NULL
329 #define get_vc_uniscr(vc) vc->vc_uni_screen
332 #define VC_UNI_SCREEN_DEBUG 0
334 typedef uint32_t char32_t
;
337 * Our screen buffer is preceded by an array of line pointers so that
338 * scrolling only implies some pointer shuffling.
344 static struct uni_screen
*vc_uniscr_alloc(unsigned int cols
, unsigned int rows
)
346 struct uni_screen
*uniscr
;
348 unsigned int memsize
, i
;
350 /* allocate everything in one go */
351 memsize
= cols
* rows
* sizeof(char32_t
);
352 memsize
+= rows
* sizeof(char32_t
*);
353 p
= kmalloc(memsize
, GFP_KERNEL
);
357 /* initial line pointers */
359 p
= uniscr
->lines
+ rows
;
360 for (i
= 0; i
< rows
; i
++) {
361 uniscr
->lines
[i
] = p
;
362 p
+= cols
* sizeof(char32_t
);
367 static void vc_uniscr_set(struct vc_data
*vc
, struct uni_screen
*new_uniscr
)
369 kfree(vc
->vc_uni_screen
);
370 vc
->vc_uni_screen
= new_uniscr
;
373 static void vc_uniscr_putc(struct vc_data
*vc
, char32_t uc
)
375 struct uni_screen
*uniscr
= get_vc_uniscr(vc
);
378 uniscr
->lines
[vc
->vc_y
][vc
->vc_x
] = uc
;
381 static void vc_uniscr_insert(struct vc_data
*vc
, unsigned int nr
)
383 struct uni_screen
*uniscr
= get_vc_uniscr(vc
);
386 char32_t
*ln
= uniscr
->lines
[vc
->vc_y
];
387 unsigned int x
= vc
->vc_x
, cols
= vc
->vc_cols
;
389 memmove(&ln
[x
+ nr
], &ln
[x
], (cols
- x
- nr
) * sizeof(*ln
));
390 memset32(&ln
[x
], ' ', nr
);
394 static void vc_uniscr_delete(struct vc_data
*vc
, unsigned int nr
)
396 struct uni_screen
*uniscr
= get_vc_uniscr(vc
);
399 char32_t
*ln
= uniscr
->lines
[vc
->vc_y
];
400 unsigned int x
= vc
->vc_x
, cols
= vc
->vc_cols
;
402 memcpy(&ln
[x
], &ln
[x
+ nr
], (cols
- x
- nr
) * sizeof(*ln
));
403 memset32(&ln
[cols
- nr
], ' ', nr
);
407 static void vc_uniscr_clear_line(struct vc_data
*vc
, unsigned int x
,
410 struct uni_screen
*uniscr
= get_vc_uniscr(vc
);
413 char32_t
*ln
= uniscr
->lines
[vc
->vc_y
];
415 memset32(&ln
[x
], ' ', nr
);
419 static void vc_uniscr_clear_lines(struct vc_data
*vc
, unsigned int y
,
422 struct uni_screen
*uniscr
= get_vc_uniscr(vc
);
425 unsigned int cols
= vc
->vc_cols
;
428 memset32(uniscr
->lines
[y
++], ' ', cols
);
432 static void vc_uniscr_scroll(struct vc_data
*vc
, unsigned int t
, unsigned int b
,
433 enum con_scroll dir
, unsigned int nr
)
435 struct uni_screen
*uniscr
= get_vc_uniscr(vc
);
438 unsigned int i
, j
, k
, sz
, d
, clear
;
443 if (dir
== SM_DOWN
) {
447 for (i
= 0; i
< gcd(d
, sz
); i
++) {
448 char32_t
*tmp
= uniscr
->lines
[t
+ i
];
456 uniscr
->lines
[t
+ j
] = uniscr
->lines
[t
+ k
];
459 uniscr
->lines
[t
+ j
] = tmp
;
461 vc_uniscr_clear_lines(vc
, clear
, nr
);
465 static void vc_uniscr_copy_area(struct uni_screen
*dst
,
466 unsigned int dst_cols
,
467 unsigned int dst_rows
,
468 struct uni_screen
*src
,
469 unsigned int src_cols
,
470 unsigned int src_top_row
,
471 unsigned int src_bot_row
)
473 unsigned int dst_row
= 0;
478 while (src_top_row
< src_bot_row
) {
479 char32_t
*src_line
= src
->lines
[src_top_row
];
480 char32_t
*dst_line
= dst
->lines
[dst_row
];
482 memcpy(dst_line
, src_line
, src_cols
* sizeof(char32_t
));
483 if (dst_cols
- src_cols
)
484 memset32(dst_line
+ src_cols
, ' ', dst_cols
- src_cols
);
488 while (dst_row
< dst_rows
) {
489 char32_t
*dst_line
= dst
->lines
[dst_row
];
491 memset32(dst_line
, ' ', dst_cols
);
497 * Called from vcs_read() to make sure unicode screen retrieval is possible.
498 * This will initialize the unicode screen buffer if not already done.
499 * This returns 0 if OK, or a negative error code otherwise.
500 * In particular, -ENODATA is returned if the console is not in UTF-8 mode.
502 int vc_uniscr_check(struct vc_data
*vc
)
504 struct uni_screen
*uniscr
;
508 if (__is_defined(NO_VC_UNI_SCREEN
))
511 WARN_CONSOLE_UNLOCKED();
516 if (vc
->vc_uni_screen
)
519 uniscr
= vc_uniscr_alloc(vc
->vc_cols
, vc
->vc_rows
);
524 * Let's populate it initially with (imperfect) reverse translation.
525 * This is the next best thing we can do short of having it enabled
526 * from the start even when no users rely on this functionality. True
527 * unicode content will be available after a complete screen refresh.
529 p
= (unsigned short *)vc
->vc_origin
;
530 mask
= vc
->vc_hi_font_mask
| 0xff;
531 for (y
= 0; y
< vc
->vc_rows
; y
++) {
532 char32_t
*line
= uniscr
->lines
[y
];
533 for (x
= 0; x
< vc
->vc_cols
; x
++) {
534 u16 glyph
= scr_readw(p
++) & mask
;
535 line
[x
] = inverse_translate(vc
, glyph
, true);
539 vc
->vc_uni_screen
= uniscr
;
544 * Called from vcs_read() to get the unicode data from the screen.
545 * This must be preceded by a successful call to vc_uniscr_check() once
546 * the console lock has been taken.
548 void vc_uniscr_copy_line(struct vc_data
*vc
, void *dest
, int viewed
,
549 unsigned int row
, unsigned int col
, unsigned int nr
)
551 struct uni_screen
*uniscr
= get_vc_uniscr(vc
);
552 int offset
= row
* vc
->vc_size_row
+ col
* 2;
557 pos
= (unsigned long)screenpos(vc
, offset
, viewed
);
558 if (pos
>= vc
->vc_origin
&& pos
< vc
->vc_scr_end
) {
560 * Desired position falls in the main screen buffer.
561 * However the actual row/col might be different if
562 * scrollback is active.
564 row
= (pos
- vc
->vc_origin
) / vc
->vc_size_row
;
565 col
= ((pos
- vc
->vc_origin
) % vc
->vc_size_row
) / 2;
566 memcpy(dest
, &uniscr
->lines
[row
][col
], nr
* sizeof(char32_t
));
569 * Scrollback is active. For now let's simply backtranslate
570 * the screen glyphs until the unicode screen buffer does
571 * synchronize with console display drivers for a scrollback
575 int mask
= vc
->vc_hi_font_mask
| 0xff;
576 char32_t
*uni_buf
= dest
;
578 u16 glyph
= scr_readw(p
++) & mask
;
579 *uni_buf
++ = inverse_translate(vc
, glyph
, true);
584 /* this is for validation and debugging only */
585 static void vc_uniscr_debug_check(struct vc_data
*vc
)
587 struct uni_screen
*uniscr
= get_vc_uniscr(vc
);
591 if (!VC_UNI_SCREEN_DEBUG
|| !uniscr
)
594 WARN_CONSOLE_UNLOCKED();
597 * Make sure our unicode screen translates into the same glyphs
598 * as the actual screen. This is brutal indeed.
600 p
= (unsigned short *)vc
->vc_origin
;
601 mask
= vc
->vc_hi_font_mask
| 0xff;
602 for (y
= 0; y
< vc
->vc_rows
; y
++) {
603 char32_t
*line
= uniscr
->lines
[y
];
604 for (x
= 0; x
< vc
->vc_cols
; x
++) {
605 u16 glyph
= scr_readw(p
++) & mask
;
606 char32_t uc
= line
[x
];
607 int tc
= conv_uni_to_pc(vc
, uc
);
609 tc
= conv_uni_to_pc(vc
, 0xfffd);
611 tc
= conv_uni_to_pc(vc
, '?');
614 "%s: mismatch at %d,%d: glyph=%#x tc=%#x\n",
615 __func__
, x
, y
, glyph
, tc
);
621 static void con_scroll(struct vc_data
*vc
, unsigned int t
, unsigned int b
,
622 enum con_scroll dir
, unsigned int nr
)
628 if (b
> vc
->vc_rows
|| t
>= b
|| nr
< 1)
630 vc_uniscr_scroll(vc
, t
, b
, dir
, nr
);
631 if (con_is_visible(vc
) && vc
->vc_sw
->con_scroll(vc
, t
, b
, dir
, nr
))
634 s
= clear
= (u16
*)(vc
->vc_origin
+ vc
->vc_size_row
* t
);
635 d
= (u16
*)(vc
->vc_origin
+ vc
->vc_size_row
* (t
+ nr
));
638 clear
= s
+ (b
- t
- nr
) * vc
->vc_cols
;
641 scr_memmovew(d
, s
, (b
- t
- nr
) * vc
->vc_size_row
);
642 scr_memsetw(clear
, vc
->vc_video_erase_char
, vc
->vc_size_row
* nr
);
645 static void do_update_region(struct vc_data
*vc
, unsigned long start
, int count
)
647 unsigned int xx
, yy
, offset
;
651 if (!vc
->vc_sw
->con_getxy
) {
652 offset
= (start
- vc
->vc_origin
) / 2;
653 xx
= offset
% vc
->vc_cols
;
654 yy
= offset
/ vc
->vc_cols
;
657 start
= vc
->vc_sw
->con_getxy(vc
, start
, &nxx
, &nyy
);
661 u16 attrib
= scr_readw(p
) & 0xff00;
664 while (xx
< vc
->vc_cols
&& count
) {
665 if (attrib
!= (scr_readw(p
) & 0xff00)) {
667 vc
->vc_sw
->con_putcs(vc
, q
, p
-q
, yy
, startx
);
670 attrib
= scr_readw(p
) & 0xff00;
677 vc
->vc_sw
->con_putcs(vc
, q
, p
-q
, yy
, startx
);
682 if (vc
->vc_sw
->con_getxy
) {
684 start
= vc
->vc_sw
->con_getxy(vc
, start
, NULL
, NULL
);
689 void update_region(struct vc_data
*vc
, unsigned long start
, int count
)
691 WARN_CONSOLE_UNLOCKED();
693 if (con_should_update(vc
)) {
695 do_update_region(vc
, start
, count
);
700 /* Structure of attributes is hardware-dependent */
702 static u8
build_attr(struct vc_data
*vc
, u8 _color
, u8 _intensity
, u8 _blink
,
703 u8 _underline
, u8 _reverse
, u8 _italic
)
705 if (vc
->vc_sw
->con_build_attr
)
706 return vc
->vc_sw
->con_build_attr(vc
, _color
, _intensity
,
707 _blink
, _underline
, _reverse
, _italic
);
710 * ++roman: I completely changed the attribute format for monochrome
711 * mode (!can_do_color). The formerly used MDA (monochrome display
712 * adapter) format didn't allow the combination of certain effects.
713 * Now the attribute is just a bit vector:
714 * Bit 0..1: intensity (0..2)
721 if (!vc
->vc_can_do_color
)
724 (_underline
? 4 : 0) |
728 a
= (a
& 0xF0) | vc
->vc_itcolor
;
730 a
= (a
& 0xf0) | vc
->vc_ulcolor
;
731 else if (_intensity
== 0)
732 a
= (a
& 0xf0) | vc
->vc_halfcolor
;
734 a
= ((a
) & 0x88) | ((((a
) >> 4) | ((a
) << 4)) & 0x77);
739 if (vc
->vc_hi_font_mask
== 0x100)
745 static void update_attr(struct vc_data
*vc
)
747 vc
->vc_attr
= build_attr(vc
, vc
->vc_color
, vc
->vc_intensity
,
748 vc
->vc_blink
, vc
->vc_underline
,
749 vc
->vc_reverse
^ vc
->vc_decscnm
, vc
->vc_italic
);
750 vc
->vc_video_erase_char
= (build_attr(vc
, vc
->vc_color
, 1, vc
->vc_blink
, 0, vc
->vc_decscnm
, 0) << 8) | ' ';
753 /* Note: inverting the screen twice should revert to the original state */
754 void invert_screen(struct vc_data
*vc
, int offset
, int count
, int viewed
)
758 WARN_CONSOLE_UNLOCKED();
761 p
= screenpos(vc
, offset
, viewed
);
762 if (vc
->vc_sw
->con_invert_region
) {
763 vc
->vc_sw
->con_invert_region(vc
, p
, count
);
769 if (!vc
->vc_can_do_color
) {
776 } else if (vc
->vc_hi_font_mask
== 0x100) {
779 a
= ((a
) & 0x11ff) | (((a
) & 0xe000) >> 4) | (((a
) & 0x0e00) << 4);
786 a
= ((a
) & 0x88ff) | (((a
) & 0x7000) >> 4) | (((a
) & 0x0700) << 4);
793 if (con_should_update(vc
))
794 do_update_region(vc
, (unsigned long) p
, count
);
798 /* used by selection: complement pointer position */
799 void complement_pos(struct vc_data
*vc
, int offset
)
801 static int old_offset
= -1;
802 static unsigned short old
;
803 static unsigned short oldx
, oldy
;
805 WARN_CONSOLE_UNLOCKED();
807 if (old_offset
!= -1 && old_offset
>= 0 &&
808 old_offset
< vc
->vc_screenbuf_size
) {
809 scr_writew(old
, screenpos(vc
, old_offset
, 1));
810 if (con_should_update(vc
))
811 vc
->vc_sw
->con_putc(vc
, old
, oldy
, oldx
);
817 if (offset
!= -1 && offset
>= 0 &&
818 offset
< vc
->vc_screenbuf_size
) {
821 p
= screenpos(vc
, offset
, 1);
823 new = old
^ vc
->vc_complement_mask
;
825 if (con_should_update(vc
)) {
826 oldx
= (offset
>> 1) % vc
->vc_cols
;
827 oldy
= (offset
>> 1) / vc
->vc_cols
;
828 vc
->vc_sw
->con_putc(vc
, new, oldy
, oldx
);
834 static void insert_char(struct vc_data
*vc
, unsigned int nr
)
836 unsigned short *p
= (unsigned short *) vc
->vc_pos
;
838 vc_uniscr_insert(vc
, nr
);
839 scr_memmovew(p
+ nr
, p
, (vc
->vc_cols
- vc
->vc_x
- nr
) * 2);
840 scr_memsetw(p
, vc
->vc_video_erase_char
, nr
* 2);
841 vc
->vc_need_wrap
= 0;
842 if (con_should_update(vc
))
843 do_update_region(vc
, (unsigned long) p
,
844 vc
->vc_cols
- vc
->vc_x
);
847 static void delete_char(struct vc_data
*vc
, unsigned int nr
)
849 unsigned short *p
= (unsigned short *) vc
->vc_pos
;
851 vc_uniscr_delete(vc
, nr
);
852 scr_memcpyw(p
, p
+ nr
, (vc
->vc_cols
- vc
->vc_x
- nr
) * 2);
853 scr_memsetw(p
+ vc
->vc_cols
- vc
->vc_x
- nr
, vc
->vc_video_erase_char
,
855 vc
->vc_need_wrap
= 0;
856 if (con_should_update(vc
))
857 do_update_region(vc
, (unsigned long) p
,
858 vc
->vc_cols
- vc
->vc_x
);
861 static int softcursor_original
= -1;
863 static void add_softcursor(struct vc_data
*vc
)
865 int i
= scr_readw((u16
*) vc
->vc_pos
);
866 u32 type
= vc
->vc_cursor_type
;
868 if (! (type
& 0x10)) return;
869 if (softcursor_original
!= -1) return;
870 softcursor_original
= i
;
871 i
|= ((type
>> 8) & 0xff00 );
872 i
^= ((type
) & 0xff00 );
873 if ((type
& 0x20) && ((softcursor_original
& 0x7000) == (i
& 0x7000))) i
^= 0x7000;
874 if ((type
& 0x40) && ((i
& 0x700) == ((i
& 0x7000) >> 4))) i
^= 0x0700;
875 scr_writew(i
, (u16
*) vc
->vc_pos
);
876 if (con_should_update(vc
))
877 vc
->vc_sw
->con_putc(vc
, i
, vc
->vc_y
, vc
->vc_x
);
880 static void hide_softcursor(struct vc_data
*vc
)
882 if (softcursor_original
!= -1) {
883 scr_writew(softcursor_original
, (u16
*)vc
->vc_pos
);
884 if (con_should_update(vc
))
885 vc
->vc_sw
->con_putc(vc
, softcursor_original
,
887 softcursor_original
= -1;
891 static void hide_cursor(struct vc_data
*vc
)
895 vc
->vc_sw
->con_cursor(vc
, CM_ERASE
);
899 static void set_cursor(struct vc_data
*vc
)
901 if (!con_is_fg(vc
) || console_blanked
|| vc
->vc_mode
== KD_GRAPHICS
)
907 if ((vc
->vc_cursor_type
& 0x0f) != 1)
908 vc
->vc_sw
->con_cursor(vc
, CM_DRAW
);
913 static void set_origin(struct vc_data
*vc
)
915 WARN_CONSOLE_UNLOCKED();
917 if (!con_is_visible(vc
) ||
918 !vc
->vc_sw
->con_set_origin
||
919 !vc
->vc_sw
->con_set_origin(vc
))
920 vc
->vc_origin
= (unsigned long)vc
->vc_screenbuf
;
921 vc
->vc_visible_origin
= vc
->vc_origin
;
922 vc
->vc_scr_end
= vc
->vc_origin
+ vc
->vc_screenbuf_size
;
923 vc
->vc_pos
= vc
->vc_origin
+ vc
->vc_size_row
* vc
->vc_y
+ 2 * vc
->vc_x
;
926 static void save_screen(struct vc_data
*vc
)
928 WARN_CONSOLE_UNLOCKED();
930 if (vc
->vc_sw
->con_save_screen
)
931 vc
->vc_sw
->con_save_screen(vc
);
934 static void flush_scrollback(struct vc_data
*vc
)
936 WARN_CONSOLE_UNLOCKED();
939 if (vc
->vc_sw
->con_flush_scrollback
)
940 vc
->vc_sw
->con_flush_scrollback(vc
);
942 vc
->vc_sw
->con_switch(vc
);
946 * Redrawing of screen
949 void clear_buffer_attributes(struct vc_data
*vc
)
951 unsigned short *p
= (unsigned short *)vc
->vc_origin
;
952 int count
= vc
->vc_screenbuf_size
/ 2;
953 int mask
= vc
->vc_hi_font_mask
| 0xff;
955 for (; count
> 0; count
--, p
++) {
956 scr_writew((scr_readw(p
)&mask
) | (vc
->vc_video_erase_char
& ~mask
), p
);
960 void redraw_screen(struct vc_data
*vc
, int is_switch
)
964 WARN_CONSOLE_UNLOCKED();
968 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
973 struct vc_data
*old_vc
= vc_cons
[fg_console
].d
;
976 if (!con_is_visible(vc
))
978 *vc
->vc_display_fg
= vc
;
979 fg_console
= vc
->vc_num
;
981 if (!con_is_visible(old_vc
)) {
986 sysfs_notify(&tty0dev
->kobj
, NULL
, "active");
994 int old_was_color
= vc
->vc_can_do_color
;
997 update
= vc
->vc_sw
->con_switch(vc
);
1000 * If console changed from mono<->color, the best we can do
1001 * is to clear the buffer attributes. As it currently stands,
1002 * rebuilding new attributes from the old buffer is not doable
1003 * without overly complex code.
1005 if (old_was_color
!= vc
->vc_can_do_color
) {
1007 clear_buffer_attributes(vc
);
1010 if (update
&& vc
->vc_mode
!= KD_GRAPHICS
)
1011 do_update_region(vc
, vc
->vc_origin
, vc
->vc_screenbuf_size
/ 2);
1016 compute_shiftstate();
1022 * Allocation, freeing and resizing of VTs.
1025 int vc_cons_allocated(unsigned int i
)
1027 return (i
< MAX_NR_CONSOLES
&& vc_cons
[i
].d
);
1030 static void visual_init(struct vc_data
*vc
, int num
, int init
)
1032 /* ++Geert: vc->vc_sw->con_init determines console size */
1034 module_put(vc
->vc_sw
->owner
);
1035 vc
->vc_sw
= conswitchp
;
1036 #ifndef VT_SINGLE_DRIVER
1037 if (con_driver_map
[num
])
1038 vc
->vc_sw
= con_driver_map
[num
];
1040 __module_get(vc
->vc_sw
->owner
);
1042 vc
->vc_display_fg
= &master_display_fg
;
1043 if (vc
->vc_uni_pagedir_loc
)
1044 con_free_unimap(vc
);
1045 vc
->vc_uni_pagedir_loc
= &vc
->vc_uni_pagedir
;
1046 vc
->vc_uni_pagedir
= NULL
;
1047 vc
->vc_hi_font_mask
= 0;
1048 vc
->vc_complement_mask
= 0;
1049 vc
->vc_can_do_color
= 0;
1050 vc
->vc_cur_blink_ms
= DEFAULT_CURSOR_BLINK_MS
;
1051 vc
->vc_sw
->con_init(vc
, init
);
1052 if (!vc
->vc_complement_mask
)
1053 vc
->vc_complement_mask
= vc
->vc_can_do_color
? 0x7700 : 0x0800;
1054 vc
->vc_s_complement_mask
= vc
->vc_complement_mask
;
1055 vc
->vc_size_row
= vc
->vc_cols
<< 1;
1056 vc
->vc_screenbuf_size
= vc
->vc_rows
* vc
->vc_size_row
;
1059 int vc_allocate(unsigned int currcons
) /* return 0 on success */
1061 struct vt_notifier_param param
;
1064 WARN_CONSOLE_UNLOCKED();
1066 if (currcons
>= MAX_NR_CONSOLES
)
1069 if (vc_cons
[currcons
].d
)
1072 /* due to the granularity of kmalloc, we waste some memory here */
1073 /* the alloc is done in two steps, to optimize the common situation
1074 of a 25x80 console (structsize=216, screenbuf_size=4000) */
1075 /* although the numbers above are not valid since long ago, the
1076 point is still up-to-date and the comment still has its value
1077 even if only as a historical artifact. --mj, July 1998 */
1078 param
.vc
= vc
= kzalloc(sizeof(struct vc_data
), GFP_KERNEL
);
1082 vc_cons
[currcons
].d
= vc
;
1083 tty_port_init(&vc
->port
);
1084 INIT_WORK(&vc_cons
[currcons
].SAK_work
, vc_SAK
);
1086 visual_init(vc
, currcons
, 1);
1088 if (!*vc
->vc_uni_pagedir_loc
)
1089 con_set_default_unimap(vc
);
1091 vc
->vc_screenbuf
= kzalloc(vc
->vc_screenbuf_size
, GFP_KERNEL
);
1092 if (!vc
->vc_screenbuf
)
1095 /* If no drivers have overridden us and the user didn't pass a
1096 boot option, default to displaying the cursor */
1097 if (global_cursor_default
== -1)
1098 global_cursor_default
= 1;
1100 vc_init(vc
, vc
->vc_rows
, vc
->vc_cols
, 1);
1101 vcs_make_sysfs(currcons
);
1102 atomic_notifier_call_chain(&vt_notifier_list
, VT_ALLOCATE
, ¶m
);
1107 vc_cons
[currcons
].d
= NULL
;
1111 static inline int resize_screen(struct vc_data
*vc
, int width
, int height
,
1114 /* Resizes the resolution of the display adapater */
1117 if (vc
->vc_mode
!= KD_GRAPHICS
&& vc
->vc_sw
->con_resize
)
1118 err
= vc
->vc_sw
->con_resize(vc
, width
, height
, user
);
1124 * Change # of rows and columns (0 means unchanged/the size of fg_console)
1125 * [this is to be used together with some user program
1126 * like resize that changes the hardware videomode]
1128 #define VC_RESIZE_MAXCOL (32767)
1129 #define VC_RESIZE_MAXROW (32767)
1132 * vc_do_resize - resizing method for the tty
1133 * @tty: tty being resized
1134 * @real_tty: real tty (different to tty if a pty/tty pair)
1135 * @vc: virtual console private data
1139 * Resize a virtual console, clipping according to the actual constraints.
1140 * If the caller passes a tty structure then update the termios winsize
1141 * information and perform any necessary signal handling.
1143 * Caller must hold the console semaphore. Takes the termios rwsem and
1144 * ctrl_lock of the tty IFF a tty is passed.
1147 static int vc_do_resize(struct tty_struct
*tty
, struct vc_data
*vc
,
1148 unsigned int cols
, unsigned int lines
)
1150 unsigned long old_origin
, new_origin
, new_scr_end
, rlth
, rrem
, err
= 0;
1152 unsigned int old_rows
, old_row_size
, first_copied_row
;
1153 unsigned int new_cols
, new_rows
, new_row_size
, new_screen_size
;
1155 unsigned short *newscreen
;
1156 struct uni_screen
*new_uniscr
= NULL
;
1158 WARN_CONSOLE_UNLOCKED();
1163 user
= vc
->vc_resize_user
;
1164 vc
->vc_resize_user
= 0;
1166 if (cols
> VC_RESIZE_MAXCOL
|| lines
> VC_RESIZE_MAXROW
)
1169 new_cols
= (cols
? cols
: vc
->vc_cols
);
1170 new_rows
= (lines
? lines
: vc
->vc_rows
);
1171 new_row_size
= new_cols
<< 1;
1172 new_screen_size
= new_row_size
* new_rows
;
1174 if (new_cols
== vc
->vc_cols
&& new_rows
== vc
->vc_rows
)
1177 if (new_screen_size
> (4 << 20))
1179 newscreen
= kzalloc(new_screen_size
, GFP_USER
);
1183 if (get_vc_uniscr(vc
)) {
1184 new_uniscr
= vc_uniscr_alloc(new_cols
, new_rows
);
1194 old_rows
= vc
->vc_rows
;
1195 old_row_size
= vc
->vc_size_row
;
1197 err
= resize_screen(vc
, new_cols
, new_rows
, user
);
1204 vc
->vc_rows
= new_rows
;
1205 vc
->vc_cols
= new_cols
;
1206 vc
->vc_size_row
= new_row_size
;
1207 vc
->vc_screenbuf_size
= new_screen_size
;
1209 rlth
= min(old_row_size
, new_row_size
);
1210 rrem
= new_row_size
- rlth
;
1211 old_origin
= vc
->vc_origin
;
1212 new_origin
= (long) newscreen
;
1213 new_scr_end
= new_origin
+ new_screen_size
;
1215 if (vc
->vc_y
> new_rows
) {
1216 if (old_rows
- vc
->vc_y
< new_rows
) {
1218 * Cursor near the bottom, copy contents from the
1221 first_copied_row
= (old_rows
- new_rows
);
1224 * Cursor is in no man's land, copy 1/2 screenful
1225 * from the top and bottom of cursor position
1227 first_copied_row
= (vc
->vc_y
- new_rows
/2);
1229 old_origin
+= first_copied_row
* old_row_size
;
1231 first_copied_row
= 0;
1232 end
= old_origin
+ old_row_size
* min(old_rows
, new_rows
);
1234 vc_uniscr_copy_area(new_uniscr
, new_cols
, new_rows
,
1235 get_vc_uniscr(vc
), rlth
/2, first_copied_row
,
1236 min(old_rows
, new_rows
));
1237 vc_uniscr_set(vc
, new_uniscr
);
1241 while (old_origin
< end
) {
1242 scr_memcpyw((unsigned short *) new_origin
,
1243 (unsigned short *) old_origin
, rlth
);
1245 scr_memsetw((void *)(new_origin
+ rlth
),
1246 vc
->vc_video_erase_char
, rrem
);
1247 old_origin
+= old_row_size
;
1248 new_origin
+= new_row_size
;
1250 if (new_scr_end
> new_origin
)
1251 scr_memsetw((void *)new_origin
, vc
->vc_video_erase_char
,
1252 new_scr_end
- new_origin
);
1253 kfree(vc
->vc_screenbuf
);
1254 vc
->vc_screenbuf
= newscreen
;
1255 vc
->vc_screenbuf_size
= new_screen_size
;
1258 /* do part of a reset_terminal() */
1260 vc
->vc_bottom
= vc
->vc_rows
;
1261 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
);
1265 /* Rewrite the requested winsize data with the actual
1268 memset(&ws
, 0, sizeof(ws
));
1269 ws
.ws_row
= vc
->vc_rows
;
1270 ws
.ws_col
= vc
->vc_cols
;
1271 ws
.ws_ypixel
= vc
->vc_scan_lines
;
1272 tty_do_resize(tty
, &ws
);
1275 if (con_is_visible(vc
))
1277 vt_event_post(VT_EVENT_RESIZE
, vc
->vc_num
, vc
->vc_num
);
1283 * vc_resize - resize a VT
1284 * @vc: virtual console
1288 * Resize a virtual console as seen from the console end of things. We
1289 * use the common vc_do_resize methods to update the structures. The
1290 * caller must hold the console sem to protect console internals and
1294 int vc_resize(struct vc_data
*vc
, unsigned int cols
, unsigned int rows
)
1296 return vc_do_resize(vc
->port
.tty
, vc
, cols
, rows
);
1300 * vt_resize - resize a VT
1301 * @tty: tty to resize
1302 * @ws: winsize attributes
1304 * Resize a virtual terminal. This is called by the tty layer as we
1305 * register our own handler for resizing. The mutual helper does all
1308 * Takes the console sem and the called methods then take the tty
1309 * termios_rwsem and the tty ctrl_lock in that order.
1311 static int vt_resize(struct tty_struct
*tty
, struct winsize
*ws
)
1313 struct vc_data
*vc
= tty
->driver_data
;
1317 ret
= vc_do_resize(tty
, vc
, ws
->ws_col
, ws
->ws_row
);
1322 struct vc_data
*vc_deallocate(unsigned int currcons
)
1324 struct vc_data
*vc
= NULL
;
1326 WARN_CONSOLE_UNLOCKED();
1328 if (vc_cons_allocated(currcons
)) {
1329 struct vt_notifier_param param
;
1331 param
.vc
= vc
= vc_cons
[currcons
].d
;
1332 atomic_notifier_call_chain(&vt_notifier_list
, VT_DEALLOCATE
, ¶m
);
1333 vcs_remove_sysfs(currcons
);
1334 vc
->vc_sw
->con_deinit(vc
);
1335 put_pid(vc
->vt_pid
);
1336 module_put(vc
->vc_sw
->owner
);
1337 vc_uniscr_set(vc
, NULL
);
1338 kfree(vc
->vc_screenbuf
);
1339 vc_cons
[currcons
].d
= NULL
;
1348 enum { EPecma
= 0, EPdec
, EPeq
, EPgt
, EPlt
};
1350 #define set_kbd(vc, x) vt_set_kbd_mode_bit((vc)->vc_num, (x))
1351 #define clr_kbd(vc, x) vt_clr_kbd_mode_bit((vc)->vc_num, (x))
1352 #define is_kbd(vc, x) vt_get_kbd_mode_bit((vc)->vc_num, (x))
1354 #define decarm VC_REPEAT
1355 #define decckm VC_CKMODE
1356 #define kbdapplic VC_APPLIC
1360 * this is what the terminal answers to a ESC-Z or csi0c query.
1362 #define VT100ID "\033[?1;2c"
1363 #define VT102ID "\033[?6c"
1365 const unsigned char color_table
[] = { 0, 4, 2, 6, 1, 5, 3, 7,
1366 8,12,10,14, 9,13,11,15 };
1368 /* the default colour table, for VGA+ colour systems */
1369 unsigned char default_red
[] = {
1370 0x00, 0xaa, 0x00, 0xaa, 0x00, 0xaa, 0x00, 0xaa,
1371 0x55, 0xff, 0x55, 0xff, 0x55, 0xff, 0x55, 0xff
1373 module_param_array(default_red
, byte
, NULL
, S_IRUGO
| S_IWUSR
);
1375 unsigned char default_grn
[] = {
1376 0x00, 0x00, 0xaa, 0x55, 0x00, 0x00, 0xaa, 0xaa,
1377 0x55, 0x55, 0xff, 0xff, 0x55, 0x55, 0xff, 0xff
1379 module_param_array(default_grn
, byte
, NULL
, S_IRUGO
| S_IWUSR
);
1381 unsigned char default_blu
[] = {
1382 0x00, 0x00, 0x00, 0x00, 0xaa, 0xaa, 0xaa, 0xaa,
1383 0x55, 0x55, 0x55, 0x55, 0xff, 0xff, 0xff, 0xff
1385 module_param_array(default_blu
, byte
, NULL
, S_IRUGO
| S_IWUSR
);
1388 * gotoxy() must verify all boundaries, because the arguments
1389 * might also be negative. If the given position is out of
1390 * bounds, the cursor is placed at the nearest margin.
1392 static void gotoxy(struct vc_data
*vc
, int new_x
, int new_y
)
1399 if (new_x
>= vc
->vc_cols
)
1400 vc
->vc_x
= vc
->vc_cols
- 1;
1407 max_y
= vc
->vc_bottom
;
1410 max_y
= vc
->vc_rows
;
1414 else if (new_y
>= max_y
)
1415 vc
->vc_y
= max_y
- 1;
1418 vc
->vc_pos
= vc
->vc_origin
+ vc
->vc_y
* vc
->vc_size_row
+ (vc
->vc_x
<<1);
1419 vc
->vc_need_wrap
= 0;
1422 /* for absolute user moves, when decom is set */
1423 static void gotoxay(struct vc_data
*vc
, int new_x
, int new_y
)
1425 gotoxy(vc
, new_x
, vc
->vc_decom
? (vc
->vc_top
+ new_y
) : new_y
);
1428 void scrollback(struct vc_data
*vc
)
1430 scrolldelta(-(vc
->vc_rows
/ 2));
1433 void scrollfront(struct vc_data
*vc
, int lines
)
1436 lines
= vc
->vc_rows
/ 2;
1440 static void lf(struct vc_data
*vc
)
1442 /* don't scroll if above bottom of scrolling region, or
1443 * if below scrolling region
1445 if (vc
->vc_y
+ 1 == vc
->vc_bottom
)
1446 con_scroll(vc
, vc
->vc_top
, vc
->vc_bottom
, SM_UP
, 1);
1447 else if (vc
->vc_y
< vc
->vc_rows
- 1) {
1449 vc
->vc_pos
+= vc
->vc_size_row
;
1451 vc
->vc_need_wrap
= 0;
1452 notify_write(vc
, '\n');
1455 static void ri(struct vc_data
*vc
)
1457 /* don't scroll if below top of scrolling region, or
1458 * if above scrolling region
1460 if (vc
->vc_y
== vc
->vc_top
)
1461 con_scroll(vc
, vc
->vc_top
, vc
->vc_bottom
, SM_DOWN
, 1);
1462 else if (vc
->vc_y
> 0) {
1464 vc
->vc_pos
-= vc
->vc_size_row
;
1466 vc
->vc_need_wrap
= 0;
1469 static inline void cr(struct vc_data
*vc
)
1471 vc
->vc_pos
-= vc
->vc_x
<< 1;
1472 vc
->vc_need_wrap
= vc
->vc_x
= 0;
1473 notify_write(vc
, '\r');
1476 static inline void bs(struct vc_data
*vc
)
1481 vc
->vc_need_wrap
= 0;
1482 notify_write(vc
, '\b');
1486 static inline void del(struct vc_data
*vc
)
1491 static void csi_J(struct vc_data
*vc
, int vpar
)
1494 unsigned short * start
;
1497 case 0: /* erase from cursor to end of display */
1498 vc_uniscr_clear_line(vc
, vc
->vc_x
,
1499 vc
->vc_cols
- vc
->vc_x
);
1500 vc_uniscr_clear_lines(vc
, vc
->vc_y
+ 1,
1501 vc
->vc_rows
- vc
->vc_y
- 1);
1502 count
= (vc
->vc_scr_end
- vc
->vc_pos
) >> 1;
1503 start
= (unsigned short *)vc
->vc_pos
;
1505 case 1: /* erase from start to cursor */
1506 vc_uniscr_clear_line(vc
, 0, vc
->vc_x
+ 1);
1507 vc_uniscr_clear_lines(vc
, 0, vc
->vc_y
);
1508 count
= ((vc
->vc_pos
- vc
->vc_origin
) >> 1) + 1;
1509 start
= (unsigned short *)vc
->vc_origin
;
1511 case 3: /* include scrollback */
1512 flush_scrollback(vc
);
1514 case 2: /* erase whole display */
1515 vc_uniscr_clear_lines(vc
, 0, vc
->vc_rows
);
1516 count
= vc
->vc_cols
* vc
->vc_rows
;
1517 start
= (unsigned short *)vc
->vc_origin
;
1522 scr_memsetw(start
, vc
->vc_video_erase_char
, 2 * count
);
1523 update_region(vc
, (unsigned long) start
, count
);
1524 vc
->vc_need_wrap
= 0;
1527 static void csi_K(struct vc_data
*vc
, int vpar
)
1530 unsigned short *start
= (unsigned short *)vc
->vc_pos
;
1534 case 0: /* erase from cursor to end of line */
1536 count
= vc
->vc_cols
- vc
->vc_x
;
1538 case 1: /* erase from start of line to cursor */
1540 count
= vc
->vc_x
+ 1;
1542 case 2: /* erase whole line */
1544 count
= vc
->vc_cols
;
1549 vc_uniscr_clear_line(vc
, vc
->vc_x
+ offset
, count
);
1550 scr_memsetw(start
+ offset
, vc
->vc_video_erase_char
, 2 * count
);
1551 vc
->vc_need_wrap
= 0;
1552 if (con_should_update(vc
))
1553 do_update_region(vc
, (unsigned long)(start
+ offset
), count
);
1556 static void csi_X(struct vc_data
*vc
, int vpar
) /* erase the following vpar positions */
1562 count
= (vpar
> vc
->vc_cols
- vc
->vc_x
) ? (vc
->vc_cols
- vc
->vc_x
) : vpar
;
1564 vc_uniscr_clear_line(vc
, vc
->vc_x
, count
);
1565 scr_memsetw((unsigned short *)vc
->vc_pos
, vc
->vc_video_erase_char
, 2 * count
);
1566 if (con_should_update(vc
))
1567 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, vc
->vc_x
, 1, count
);
1568 vc
->vc_need_wrap
= 0;
1571 static void default_attr(struct vc_data
*vc
)
1573 vc
->vc_intensity
= 1;
1575 vc
->vc_underline
= 0;
1578 vc
->vc_color
= vc
->vc_def_color
;
1581 struct rgb
{ u8 r
; u8 g
; u8 b
; };
1583 static void rgb_from_256(int i
, struct rgb
*c
)
1585 if (i
< 8) { /* Standard colours. */
1586 c
->r
= i
&1 ? 0xaa : 0x00;
1587 c
->g
= i
&2 ? 0xaa : 0x00;
1588 c
->b
= i
&4 ? 0xaa : 0x00;
1589 } else if (i
< 16) {
1590 c
->r
= i
&1 ? 0xff : 0x55;
1591 c
->g
= i
&2 ? 0xff : 0x55;
1592 c
->b
= i
&4 ? 0xff : 0x55;
1593 } else if (i
< 232) { /* 6x6x6 colour cube. */
1594 c
->r
= (i
- 16) / 36 * 85 / 2;
1595 c
->g
= (i
- 16) / 6 % 6 * 85 / 2;
1596 c
->b
= (i
- 16) % 6 * 85 / 2;
1597 } else /* Grayscale ramp. */
1598 c
->r
= c
->g
= c
->b
= i
* 10 - 2312;
1601 static void rgb_foreground(struct vc_data
*vc
, const struct rgb
*c
)
1603 u8 hue
= 0, max
= max3(c
->r
, c
->g
, c
->b
);
1612 if (hue
== 7 && max
<= 0x55) {
1614 vc
->vc_intensity
= 2;
1615 } else if (max
> 0xaa)
1616 vc
->vc_intensity
= 2;
1618 vc
->vc_intensity
= 1;
1620 vc
->vc_color
= (vc
->vc_color
& 0xf0) | hue
;
1623 static void rgb_background(struct vc_data
*vc
, const struct rgb
*c
)
1625 /* For backgrounds, err on the dark side. */
1626 vc
->vc_color
= (vc
->vc_color
& 0x0f)
1627 | (c
->r
&0x80) >> 1 | (c
->g
&0x80) >> 2 | (c
->b
&0x80) >> 3;
1631 * ITU T.416 Higher colour modes. They break the usual properties of SGR codes
1632 * and thus need to be detected and ignored by hand. That standard also
1633 * wants : rather than ; as separators but sequences containing : are currently
1634 * completely ignored by the parser.
1636 * Subcommands 3 (CMY) and 4 (CMYK) are so insane there's no point in
1639 static int vc_t416_color(struct vc_data
*vc
, int i
,
1640 void(*set_color
)(struct vc_data
*vc
, const struct rgb
*c
))
1645 if (i
> vc
->vc_npar
)
1648 if (vc
->vc_par
[i
] == 5 && i
+ 1 <= vc
->vc_npar
) {
1651 rgb_from_256(vc
->vc_par
[i
], &c
);
1652 } else if (vc
->vc_par
[i
] == 2 && i
+ 3 <= vc
->vc_npar
) {
1654 c
.r
= vc
->vc_par
[i
+ 1];
1655 c
.g
= vc
->vc_par
[i
+ 2];
1656 c
.b
= vc
->vc_par
[i
+ 3];
1666 /* console_lock is held */
1667 static void csi_m(struct vc_data
*vc
)
1671 for (i
= 0; i
<= vc
->vc_npar
; i
++)
1672 switch (vc
->vc_par
[i
]) {
1673 case 0: /* all attributes off */
1677 vc
->vc_intensity
= 2;
1680 vc
->vc_intensity
= 0;
1687 * No console drivers support double underline, so
1688 * convert it to a single underline.
1691 vc
->vc_underline
= 1;
1699 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1700 * Select primary font, don't display control chars if
1701 * defined, don't set bit 8 on output.
1703 vc
->vc_translate
= set_translate(vc
->vc_charset
== 0
1705 : vc
->vc_G1_charset
, vc
);
1706 vc
->vc_disp_ctrl
= 0;
1707 vc
->vc_toggle_meta
= 0;
1709 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1710 * Select first alternate font, lets chars < 32 be
1711 * displayed as ROM chars.
1713 vc
->vc_translate
= set_translate(IBMPC_MAP
, vc
);
1714 vc
->vc_disp_ctrl
= 1;
1715 vc
->vc_toggle_meta
= 0;
1717 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1718 * Select second alternate font, toggle high bit
1719 * before displaying as ROM char.
1721 vc
->vc_translate
= set_translate(IBMPC_MAP
, vc
);
1722 vc
->vc_disp_ctrl
= 1;
1723 vc
->vc_toggle_meta
= 1;
1726 vc
->vc_intensity
= 1;
1732 vc
->vc_underline
= 0;
1741 i
= vc_t416_color(vc
, i
, rgb_foreground
);
1744 i
= vc_t416_color(vc
, i
, rgb_background
);
1747 vc
->vc_color
= (vc
->vc_def_color
& 0x0f) |
1748 (vc
->vc_color
& 0xf0);
1751 vc
->vc_color
= (vc
->vc_def_color
& 0xf0) |
1752 (vc
->vc_color
& 0x0f);
1755 if (vc
->vc_par
[i
] >= 90 && vc
->vc_par
[i
] <= 107) {
1756 if (vc
->vc_par
[i
] < 100)
1757 vc
->vc_intensity
= 2;
1758 vc
->vc_par
[i
] -= 60;
1760 if (vc
->vc_par
[i
] >= 30 && vc
->vc_par
[i
] <= 37)
1761 vc
->vc_color
= color_table
[vc
->vc_par
[i
] - 30]
1762 | (vc
->vc_color
& 0xf0);
1763 else if (vc
->vc_par
[i
] >= 40 && vc
->vc_par
[i
] <= 47)
1764 vc
->vc_color
= (color_table
[vc
->vc_par
[i
] - 40] << 4)
1765 | (vc
->vc_color
& 0x0f);
1771 static void respond_string(const char *p
, struct tty_port
*port
)
1774 tty_insert_flip_char(port
, *p
, 0);
1777 tty_schedule_flip(port
);
1780 static void cursor_report(struct vc_data
*vc
, struct tty_struct
*tty
)
1784 sprintf(buf
, "\033[%d;%dR", vc
->vc_y
+ (vc
->vc_decom
? vc
->vc_top
+ 1 : 1), vc
->vc_x
+ 1);
1785 respond_string(buf
, tty
->port
);
1788 static inline void status_report(struct tty_struct
*tty
)
1790 respond_string("\033[0n", tty
->port
); /* Terminal ok */
1793 static inline void respond_ID(struct tty_struct
*tty
)
1795 respond_string(VT102ID
, tty
->port
);
1798 void mouse_report(struct tty_struct
*tty
, int butt
, int mrx
, int mry
)
1802 sprintf(buf
, "\033[M%c%c%c", (char)(' ' + butt
), (char)('!' + mrx
),
1804 respond_string(buf
, tty
->port
);
1807 /* invoked via ioctl(TIOCLINUX) and through set_selection */
1808 int mouse_reporting(void)
1810 return vc_cons
[fg_console
].d
->vc_report_mouse
;
1813 /* console_lock is held */
1814 static void set_mode(struct vc_data
*vc
, int on_off
)
1818 for (i
= 0; i
<= vc
->vc_npar
; i
++)
1819 if (vc
->vc_priv
== EPdec
) {
1820 switch(vc
->vc_par
[i
]) { /* DEC private modes set/reset */
1821 case 1: /* Cursor keys send ^[Ox/^[[x */
1823 set_kbd(vc
, decckm
);
1825 clr_kbd(vc
, decckm
);
1827 case 3: /* 80/132 mode switch unimplemented */
1829 vc_resize(deccolm
? 132 : 80, vc
->vc_rows
);
1830 /* this alone does not suffice; some user mode
1831 utility has to change the hardware regs */
1834 case 5: /* Inverted screen on/off */
1835 if (vc
->vc_decscnm
!= on_off
) {
1836 vc
->vc_decscnm
= on_off
;
1837 invert_screen(vc
, 0, vc
->vc_screenbuf_size
, 0);
1841 case 6: /* Origin relative/absolute */
1842 vc
->vc_decom
= on_off
;
1845 case 7: /* Autowrap on/off */
1846 vc
->vc_decawm
= on_off
;
1848 case 8: /* Autorepeat on/off */
1850 set_kbd(vc
, decarm
);
1852 clr_kbd(vc
, decarm
);
1855 vc
->vc_report_mouse
= on_off
? 1 : 0;
1857 case 25: /* Cursor on/off */
1858 vc
->vc_deccm
= on_off
;
1861 vc
->vc_report_mouse
= on_off
? 2 : 0;
1865 switch(vc
->vc_par
[i
]) { /* ANSI modes set/reset */
1866 case 3: /* Monitor (display ctrls) */
1867 vc
->vc_disp_ctrl
= on_off
;
1869 case 4: /* Insert Mode on/off */
1870 vc
->vc_decim
= on_off
;
1872 case 20: /* Lf, Enter == CrLf/Lf */
1882 /* console_lock is held */
1883 static void setterm_command(struct vc_data
*vc
)
1885 switch(vc
->vc_par
[0]) {
1886 case 1: /* set color for underline mode */
1887 if (vc
->vc_can_do_color
&&
1888 vc
->vc_par
[1] < 16) {
1889 vc
->vc_ulcolor
= color_table
[vc
->vc_par
[1]];
1890 if (vc
->vc_underline
)
1894 case 2: /* set color for half intensity mode */
1895 if (vc
->vc_can_do_color
&&
1896 vc
->vc_par
[1] < 16) {
1897 vc
->vc_halfcolor
= color_table
[vc
->vc_par
[1]];
1898 if (vc
->vc_intensity
== 0)
1902 case 8: /* store colors as defaults */
1903 vc
->vc_def_color
= vc
->vc_attr
;
1904 if (vc
->vc_hi_font_mask
== 0x100)
1905 vc
->vc_def_color
>>= 1;
1909 case 9: /* set blanking interval */
1910 blankinterval
= ((vc
->vc_par
[1] < 60) ? vc
->vc_par
[1] : 60) * 60;
1911 poke_blanked_console();
1913 case 10: /* set bell frequency in Hz */
1914 if (vc
->vc_npar
>= 1)
1915 vc
->vc_bell_pitch
= vc
->vc_par
[1];
1917 vc
->vc_bell_pitch
= DEFAULT_BELL_PITCH
;
1919 case 11: /* set bell duration in msec */
1920 if (vc
->vc_npar
>= 1)
1921 vc
->vc_bell_duration
= (vc
->vc_par
[1] < 2000) ?
1922 msecs_to_jiffies(vc
->vc_par
[1]) : 0;
1924 vc
->vc_bell_duration
= DEFAULT_BELL_DURATION
;
1926 case 12: /* bring specified console to the front */
1927 if (vc
->vc_par
[1] >= 1 && vc_cons_allocated(vc
->vc_par
[1] - 1))
1928 set_console(vc
->vc_par
[1] - 1);
1930 case 13: /* unblank the screen */
1931 poke_blanked_console();
1933 case 14: /* set vesa powerdown interval */
1934 vesa_off_interval
= ((vc
->vc_par
[1] < 60) ? vc
->vc_par
[1] : 60) * 60 * HZ
;
1936 case 15: /* activate the previous console */
1937 set_console(last_console
);
1939 case 16: /* set cursor blink duration in msec */
1940 if (vc
->vc_npar
>= 1 && vc
->vc_par
[1] >= 50 &&
1941 vc
->vc_par
[1] <= USHRT_MAX
)
1942 vc
->vc_cur_blink_ms
= vc
->vc_par
[1];
1944 vc
->vc_cur_blink_ms
= DEFAULT_CURSOR_BLINK_MS
;
1949 /* console_lock is held */
1950 static void csi_at(struct vc_data
*vc
, unsigned int nr
)
1952 if (nr
> vc
->vc_cols
- vc
->vc_x
)
1953 nr
= vc
->vc_cols
- vc
->vc_x
;
1956 insert_char(vc
, nr
);
1959 /* console_lock is held */
1960 static void csi_L(struct vc_data
*vc
, unsigned int nr
)
1962 if (nr
> vc
->vc_rows
- vc
->vc_y
)
1963 nr
= vc
->vc_rows
- vc
->vc_y
;
1966 con_scroll(vc
, vc
->vc_y
, vc
->vc_bottom
, SM_DOWN
, nr
);
1967 vc
->vc_need_wrap
= 0;
1970 /* console_lock is held */
1971 static void csi_P(struct vc_data
*vc
, unsigned int nr
)
1973 if (nr
> vc
->vc_cols
- vc
->vc_x
)
1974 nr
= vc
->vc_cols
- vc
->vc_x
;
1977 delete_char(vc
, nr
);
1980 /* console_lock is held */
1981 static void csi_M(struct vc_data
*vc
, unsigned int nr
)
1983 if (nr
> vc
->vc_rows
- vc
->vc_y
)
1984 nr
= vc
->vc_rows
- vc
->vc_y
;
1987 con_scroll(vc
, vc
->vc_y
, vc
->vc_bottom
, SM_UP
, nr
);
1988 vc
->vc_need_wrap
= 0;
1991 /* console_lock is held (except via vc_init->reset_terminal */
1992 static void save_cur(struct vc_data
*vc
)
1994 vc
->vc_saved_x
= vc
->vc_x
;
1995 vc
->vc_saved_y
= vc
->vc_y
;
1996 vc
->vc_s_intensity
= vc
->vc_intensity
;
1997 vc
->vc_s_italic
= vc
->vc_italic
;
1998 vc
->vc_s_underline
= vc
->vc_underline
;
1999 vc
->vc_s_blink
= vc
->vc_blink
;
2000 vc
->vc_s_reverse
= vc
->vc_reverse
;
2001 vc
->vc_s_charset
= vc
->vc_charset
;
2002 vc
->vc_s_color
= vc
->vc_color
;
2003 vc
->vc_saved_G0
= vc
->vc_G0_charset
;
2004 vc
->vc_saved_G1
= vc
->vc_G1_charset
;
2007 /* console_lock is held */
2008 static void restore_cur(struct vc_data
*vc
)
2010 gotoxy(vc
, vc
->vc_saved_x
, vc
->vc_saved_y
);
2011 vc
->vc_intensity
= vc
->vc_s_intensity
;
2012 vc
->vc_italic
= vc
->vc_s_italic
;
2013 vc
->vc_underline
= vc
->vc_s_underline
;
2014 vc
->vc_blink
= vc
->vc_s_blink
;
2015 vc
->vc_reverse
= vc
->vc_s_reverse
;
2016 vc
->vc_charset
= vc
->vc_s_charset
;
2017 vc
->vc_color
= vc
->vc_s_color
;
2018 vc
->vc_G0_charset
= vc
->vc_saved_G0
;
2019 vc
->vc_G1_charset
= vc
->vc_saved_G1
;
2020 vc
->vc_translate
= set_translate(vc
->vc_charset
? vc
->vc_G1_charset
: vc
->vc_G0_charset
, vc
);
2022 vc
->vc_need_wrap
= 0;
2025 enum { ESnormal
, ESesc
, ESsquare
, ESgetpars
, ESfunckey
,
2026 EShash
, ESsetG0
, ESsetG1
, ESpercent
, EScsiignore
, ESnonstd
,
2029 /* console_lock is held (except via vc_init()) */
2030 static void reset_terminal(struct vc_data
*vc
, int do_clear
)
2033 vc
->vc_bottom
= vc
->vc_rows
;
2034 vc
->vc_state
= ESnormal
;
2035 vc
->vc_priv
= EPecma
;
2036 vc
->vc_translate
= set_translate(LAT1_MAP
, vc
);
2037 vc
->vc_G0_charset
= LAT1_MAP
;
2038 vc
->vc_G1_charset
= GRAF_MAP
;
2040 vc
->vc_need_wrap
= 0;
2041 vc
->vc_report_mouse
= 0;
2042 vc
->vc_utf
= default_utf8
;
2043 vc
->vc_utf_count
= 0;
2045 vc
->vc_disp_ctrl
= 0;
2046 vc
->vc_toggle_meta
= 0;
2051 vc
->vc_deccm
= global_cursor_default
;
2054 vt_reset_keyboard(vc
->vc_num
);
2056 vc
->vc_cursor_type
= cur_default
;
2057 vc
->vc_complement_mask
= vc
->vc_s_complement_mask
;
2062 vc
->vc_tab_stop
[0] =
2063 vc
->vc_tab_stop
[1] =
2064 vc
->vc_tab_stop
[2] =
2065 vc
->vc_tab_stop
[3] =
2066 vc
->vc_tab_stop
[4] =
2067 vc
->vc_tab_stop
[5] =
2068 vc
->vc_tab_stop
[6] =
2069 vc
->vc_tab_stop
[7] = 0x01010101;
2071 vc
->vc_bell_pitch
= DEFAULT_BELL_PITCH
;
2072 vc
->vc_bell_duration
= DEFAULT_BELL_DURATION
;
2073 vc
->vc_cur_blink_ms
= DEFAULT_CURSOR_BLINK_MS
;
2081 /* console_lock is held */
2082 static void do_con_trol(struct tty_struct
*tty
, struct vc_data
*vc
, int c
)
2085 * Control characters can be used in the _middle_
2086 * of an escape sequence.
2088 if (vc
->vc_state
== ESosc
&& c
>=8 && c
<=13) /* ... except for OSC */
2094 if (vc
->vc_state
== ESosc
)
2095 vc
->vc_state
= ESnormal
;
2096 else if (vc
->vc_bell_duration
)
2097 kd_mksound(vc
->vc_bell_pitch
, vc
->vc_bell_duration
);
2103 vc
->vc_pos
-= (vc
->vc_x
<< 1);
2104 while (vc
->vc_x
< vc
->vc_cols
- 1) {
2106 if (vc
->vc_tab_stop
[7 & (vc
->vc_x
>> 5)] & (1 << (vc
->vc_x
& 31)))
2109 vc
->vc_pos
+= (vc
->vc_x
<< 1);
2110 notify_write(vc
, '\t');
2112 case 10: case 11: case 12:
2114 if (!is_kbd(vc
, lnm
))
2122 vc
->vc_translate
= set_translate(vc
->vc_G1_charset
, vc
);
2123 vc
->vc_disp_ctrl
= 1;
2127 vc
->vc_translate
= set_translate(vc
->vc_G0_charset
, vc
);
2128 vc
->vc_disp_ctrl
= 0;
2131 vc
->vc_state
= ESnormal
;
2134 vc
->vc_state
= ESesc
;
2140 vc
->vc_state
= ESsquare
;
2143 switch(vc
->vc_state
) {
2145 vc
->vc_state
= ESnormal
;
2148 vc
->vc_state
= ESsquare
;
2151 vc
->vc_state
= ESnonstd
;
2154 vc
->vc_state
= ESpercent
;
2167 vc
->vc_tab_stop
[7 & (vc
->vc_x
>> 5)] |= (1 << (vc
->vc_x
& 31));
2179 vc
->vc_state
= ESsetG0
;
2182 vc
->vc_state
= ESsetG1
;
2185 vc
->vc_state
= EShash
;
2188 reset_terminal(vc
, 1);
2190 case '>': /* Numeric keypad */
2191 clr_kbd(vc
, kbdapplic
);
2193 case '=': /* Appl. keypad */
2194 set_kbd(vc
, kbdapplic
);
2199 if (c
=='P') { /* palette escape sequence */
2200 for (vc
->vc_npar
= 0; vc
->vc_npar
< NPAR
; vc
->vc_npar
++)
2201 vc
->vc_par
[vc
->vc_npar
] = 0;
2203 vc
->vc_state
= ESpalette
;
2205 } else if (c
=='R') { /* reset palette */
2207 vc
->vc_state
= ESnormal
;
2208 } else if (c
>='0' && c
<='9')
2209 vc
->vc_state
= ESosc
;
2211 vc
->vc_state
= ESnormal
;
2215 vc
->vc_par
[vc
->vc_npar
++] = hex_to_bin(c
);
2216 if (vc
->vc_npar
== 7) {
2217 int i
= vc
->vc_par
[0] * 3, j
= 1;
2218 vc
->vc_palette
[i
] = 16 * vc
->vc_par
[j
++];
2219 vc
->vc_palette
[i
++] += vc
->vc_par
[j
++];
2220 vc
->vc_palette
[i
] = 16 * vc
->vc_par
[j
++];
2221 vc
->vc_palette
[i
++] += vc
->vc_par
[j
++];
2222 vc
->vc_palette
[i
] = 16 * vc
->vc_par
[j
++];
2223 vc
->vc_palette
[i
] += vc
->vc_par
[j
];
2225 vc
->vc_state
= ESnormal
;
2228 vc
->vc_state
= ESnormal
;
2231 for (vc
->vc_npar
= 0; vc
->vc_npar
< NPAR
; vc
->vc_npar
++)
2232 vc
->vc_par
[vc
->vc_npar
] = 0;
2234 vc
->vc_state
= ESgetpars
;
2235 if (c
== '[') { /* Function key */
2236 vc
->vc_state
=ESfunckey
;
2241 vc
->vc_priv
= EPdec
;
2253 vc
->vc_priv
= EPecma
;
2256 if (c
== ';' && vc
->vc_npar
< NPAR
- 1) {
2259 } else if (c
>='0' && c
<='9') {
2260 vc
->vc_par
[vc
->vc_npar
] *= 10;
2261 vc
->vc_par
[vc
->vc_npar
] += c
- '0';
2264 if (c
>= 0x20 && c
<= 0x3f) { /* 0x2x, 0x3a and 0x3c - 0x3f */
2265 vc
->vc_state
= EScsiignore
;
2268 vc
->vc_state
= ESnormal
;
2271 if (vc
->vc_priv
<= EPdec
)
2275 if (vc
->vc_priv
<= EPdec
)
2279 if (vc
->vc_priv
== EPdec
) {
2281 vc
->vc_cursor_type
= vc
->vc_par
[0] | (vc
->vc_par
[1] << 8) | (vc
->vc_par
[2] << 16);
2283 vc
->vc_cursor_type
= cur_default
;
2288 if (vc
->vc_priv
== EPdec
) {
2291 vc
->vc_complement_mask
= vc
->vc_par
[0] << 8 | vc
->vc_par
[1];
2293 vc
->vc_complement_mask
= vc
->vc_s_complement_mask
;
2298 if (vc
->vc_priv
== EPecma
) {
2299 if (vc
->vc_par
[0] == 5)
2301 else if (vc
->vc_par
[0] == 6)
2302 cursor_report(vc
, tty
);
2306 if (vc
->vc_priv
!= EPecma
) {
2307 vc
->vc_priv
= EPecma
;
2314 gotoxy(vc
, vc
->vc_par
[0], vc
->vc_y
);
2319 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
- vc
->vc_par
[0]);
2324 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
+ vc
->vc_par
[0]);
2329 gotoxy(vc
, vc
->vc_x
+ vc
->vc_par
[0], vc
->vc_y
);
2334 gotoxy(vc
, vc
->vc_x
- vc
->vc_par
[0], vc
->vc_y
);
2339 gotoxy(vc
, 0, vc
->vc_y
+ vc
->vc_par
[0]);
2344 gotoxy(vc
, 0, vc
->vc_y
- vc
->vc_par
[0]);
2349 gotoxay(vc
, vc
->vc_x
,vc
->vc_par
[0]);
2356 gotoxay(vc
, vc
->vc_par
[1], vc
->vc_par
[0]);
2359 csi_J(vc
, vc
->vc_par
[0]);
2362 csi_K(vc
, vc
->vc_par
[0]);
2365 csi_L(vc
, vc
->vc_par
[0]);
2368 csi_M(vc
, vc
->vc_par
[0]);
2371 csi_P(vc
, vc
->vc_par
[0]);
2379 vc
->vc_tab_stop
[7 & (vc
->vc_x
>> 5)] &= ~(1 << (vc
->vc_x
& 31));
2380 else if (vc
->vc_par
[0] == 3) {
2381 vc
->vc_tab_stop
[0] =
2382 vc
->vc_tab_stop
[1] =
2383 vc
->vc_tab_stop
[2] =
2384 vc
->vc_tab_stop
[3] =
2385 vc
->vc_tab_stop
[4] =
2386 vc
->vc_tab_stop
[5] =
2387 vc
->vc_tab_stop
[6] =
2388 vc
->vc_tab_stop
[7] = 0;
2394 case 'q': /* DECLL - but only 3 leds */
2395 /* map 0,1,2,3 to 0,1,2,4 */
2396 if (vc
->vc_par
[0] < 4)
2397 vt_set_led_state(vc
->vc_num
,
2398 (vc
->vc_par
[0] < 3) ? vc
->vc_par
[0] : 4);
2404 vc
->vc_par
[1] = vc
->vc_rows
;
2405 /* Minimum allowed region is 2 lines */
2406 if (vc
->vc_par
[0] < vc
->vc_par
[1] &&
2407 vc
->vc_par
[1] <= vc
->vc_rows
) {
2408 vc
->vc_top
= vc
->vc_par
[0] - 1;
2409 vc
->vc_bottom
= vc
->vc_par
[1];
2420 csi_X(vc
, vc
->vc_par
[0]);
2423 csi_at(vc
, vc
->vc_par
[0]);
2425 case ']': /* setterm functions */
2426 setterm_command(vc
);
2431 if (c
>= 20 && c
<= 0x3f)
2433 vc
->vc_state
= ESnormal
;
2436 vc
->vc_state
= ESnormal
;
2438 case '@': /* defined in ISO 2022 */
2441 case 'G': /* prelim official escape code */
2442 case '8': /* retained for compatibility */
2448 vc
->vc_state
= ESnormal
;
2451 vc
->vc_state
= ESnormal
;
2453 /* DEC screen alignment test. kludge :-) */
2454 vc
->vc_video_erase_char
=
2455 (vc
->vc_video_erase_char
& 0xff00) | 'E';
2457 vc
->vc_video_erase_char
=
2458 (vc
->vc_video_erase_char
& 0xff00) | ' ';
2459 do_update_region(vc
, vc
->vc_origin
, vc
->vc_screenbuf_size
/ 2);
2464 vc
->vc_G0_charset
= GRAF_MAP
;
2466 vc
->vc_G0_charset
= LAT1_MAP
;
2468 vc
->vc_G0_charset
= IBMPC_MAP
;
2470 vc
->vc_G0_charset
= USER_MAP
;
2471 if (vc
->vc_charset
== 0)
2472 vc
->vc_translate
= set_translate(vc
->vc_G0_charset
, vc
);
2473 vc
->vc_state
= ESnormal
;
2477 vc
->vc_G1_charset
= GRAF_MAP
;
2479 vc
->vc_G1_charset
= LAT1_MAP
;
2481 vc
->vc_G1_charset
= IBMPC_MAP
;
2483 vc
->vc_G1_charset
= USER_MAP
;
2484 if (vc
->vc_charset
== 1)
2485 vc
->vc_translate
= set_translate(vc
->vc_G1_charset
, vc
);
2486 vc
->vc_state
= ESnormal
;
2491 vc
->vc_state
= ESnormal
;
2495 /* is_double_width() is based on the wcwidth() implementation by
2496 * Markus Kuhn -- 2007-05-26 (Unicode 5.0)
2497 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
2504 static int ucs_cmp(const void *key
, const void *elt
)
2506 uint32_t ucs
= *(uint32_t *)key
;
2507 struct interval e
= *(struct interval
*) elt
;
2511 else if (ucs
< e
.first
)
2516 static int is_double_width(uint32_t ucs
)
2518 static const struct interval double_width
[] = {
2519 { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E },
2520 { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF },
2521 { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 },
2522 { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD }
2524 if (ucs
< double_width
[0].first
||
2525 ucs
> double_width
[ARRAY_SIZE(double_width
) - 1].last
)
2528 return bsearch(&ucs
, double_width
, ARRAY_SIZE(double_width
),
2529 sizeof(struct interval
), ucs_cmp
) != NULL
;
2532 static void con_flush(struct vc_data
*vc
, unsigned long draw_from
,
2533 unsigned long draw_to
, int *draw_x
)
2538 vc
->vc_sw
->con_putcs(vc
, (u16
*)draw_from
,
2539 (u16
*)draw_to
- (u16
*)draw_from
, vc
->vc_y
, *draw_x
);
2543 /* acquires console_lock */
2544 static int do_con_write(struct tty_struct
*tty
, const unsigned char *buf
, int count
)
2546 int c
, next_c
, tc
, ok
, n
= 0, draw_x
= -1;
2547 unsigned int currcons
;
2548 unsigned long draw_from
= 0, draw_to
= 0;
2550 unsigned char vc_attr
;
2551 struct vt_notifier_param param
;
2555 u16 himask
, charmask
;
2563 vc
= tty
->driver_data
;
2565 pr_err("vt: argh, driver_data is NULL !\n");
2570 currcons
= vc
->vc_num
;
2571 if (!vc_cons_allocated(currcons
)) {
2572 /* could this happen? */
2573 pr_warn_once("con_write: tty %d not allocated\n", currcons
+1);
2578 himask
= vc
->vc_hi_font_mask
;
2579 charmask
= himask
? 0x1ff : 0xff;
2581 /* undraw cursor first */
2587 while (!tty
->stopped
&& count
) {
2597 /* Do no translation at all in control states */
2598 if (vc
->vc_state
!= ESnormal
) {
2600 } else if (vc
->vc_utf
&& !vc
->vc_disp_ctrl
) {
2601 /* Combine UTF-8 into Unicode in vc_utf_char.
2602 * vc_utf_count is the number of continuation bytes still
2603 * expected to arrive.
2604 * vc_npar is the number of continuation bytes arrived so
2608 if ((c
& 0xc0) == 0x80) {
2609 /* Continuation byte received */
2610 static const uint32_t utf8_length_changes
[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff };
2611 if (vc
->vc_utf_count
) {
2612 vc
->vc_utf_char
= (vc
->vc_utf_char
<< 6) | (c
& 0x3f);
2614 if (--vc
->vc_utf_count
) {
2615 /* Still need some bytes */
2618 /* Got a whole character */
2619 c
= vc
->vc_utf_char
;
2620 /* Reject overlong sequences */
2621 if (c
<= utf8_length_changes
[vc
->vc_npar
- 1] ||
2622 c
> utf8_length_changes
[vc
->vc_npar
])
2625 /* Unexpected continuation byte */
2626 vc
->vc_utf_count
= 0;
2630 /* Single ASCII byte or first byte of a sequence received */
2631 if (vc
->vc_utf_count
) {
2632 /* Continuation byte expected */
2634 vc
->vc_utf_count
= 0;
2636 } else if (c
> 0x7f) {
2637 /* First byte of a multibyte sequence received */
2639 if ((c
& 0xe0) == 0xc0) {
2640 vc
->vc_utf_count
= 1;
2641 vc
->vc_utf_char
= (c
& 0x1f);
2642 } else if ((c
& 0xf0) == 0xe0) {
2643 vc
->vc_utf_count
= 2;
2644 vc
->vc_utf_char
= (c
& 0x0f);
2645 } else if ((c
& 0xf8) == 0xf0) {
2646 vc
->vc_utf_count
= 3;
2647 vc
->vc_utf_char
= (c
& 0x07);
2648 } else if ((c
& 0xfc) == 0xf8) {
2649 vc
->vc_utf_count
= 4;
2650 vc
->vc_utf_char
= (c
& 0x03);
2651 } else if ((c
& 0xfe) == 0xfc) {
2652 vc
->vc_utf_count
= 5;
2653 vc
->vc_utf_char
= (c
& 0x01);
2655 /* 254 and 255 are invalid */
2658 if (vc
->vc_utf_count
) {
2659 /* Still need some bytes */
2663 /* Nothing to do if an ASCII byte was received */
2665 /* End of UTF-8 decoding. */
2666 /* c is the received character, or U+FFFD for invalid sequences. */
2667 /* Replace invalid Unicode code points with U+FFFD too */
2668 if ((c
>= 0xd800 && c
<= 0xdfff) || c
== 0xfffe || c
== 0xffff)
2671 } else { /* no utf or alternate charset mode */
2672 tc
= vc_translate(vc
, c
);
2676 if (atomic_notifier_call_chain(&vt_notifier_list
, VT_PREWRITE
,
2677 ¶m
) == NOTIFY_STOP
)
2680 /* If the original code was a control character we
2681 * only allow a glyph to be displayed if the code is
2682 * not normally used (such as for cursor movement) or
2683 * if the disp_ctrl mode has been explicitly enabled.
2684 * Certain characters (as given by the CTRL_ALWAYS
2685 * bitmap) are always displayed as control characters,
2686 * as the console would be pretty useless without
2687 * them; to display an arbitrary font position use the
2688 * direct-to-font zone in UTF-8 mode.
2690 ok
= tc
&& (c
>= 32 ||
2691 !(vc
->vc_disp_ctrl
? (CTRL_ALWAYS
>> c
) & 1 :
2692 vc
->vc_utf
|| ((CTRL_ACTION
>> c
) & 1)))
2693 && (c
!= 127 || vc
->vc_disp_ctrl
)
2696 if (vc
->vc_state
== ESnormal
&& ok
) {
2697 if (vc
->vc_utf
&& !vc
->vc_disp_ctrl
) {
2698 if (is_double_width(c
))
2701 /* Now try to find out how to display it */
2702 tc
= conv_uni_to_pc(vc
, tc
);
2703 if (tc
& ~charmask
) {
2704 if (tc
== -1 || tc
== -2) {
2705 continue; /* nothing to display */
2707 /* Glyph not found */
2708 if ((!(vc
->vc_utf
&& !vc
->vc_disp_ctrl
) || c
< 128) && !(c
& ~charmask
)) {
2709 /* In legacy mode use the glyph we get by a 1:1 mapping.
2710 This would make absolutely no sense with Unicode in mind,
2711 but do this for ASCII characters since a font may lack
2712 Unicode mapping info and we don't want to end up with
2713 having question marks only. */
2716 /* Display U+FFFD. If it's not found, display an inverse question mark. */
2717 tc
= conv_uni_to_pc(vc
, 0xfffd);
2720 tc
= conv_uni_to_pc(vc
, '?');
2721 if (tc
< 0) tc
= '?';
2727 vc_attr
= vc
->vc_attr
;
2729 /* invert vc_attr */
2730 if (!vc
->vc_can_do_color
) {
2731 vc_attr
= (vc
->vc_attr
) ^ 0x08;
2732 } else if (vc
->vc_hi_font_mask
== 0x100) {
2733 vc_attr
= ((vc
->vc_attr
) & 0x11) | (((vc
->vc_attr
) & 0xe0) >> 4) | (((vc
->vc_attr
) & 0x0e) << 4);
2735 vc_attr
= ((vc
->vc_attr
) & 0x88) | (((vc
->vc_attr
) & 0x70) >> 4) | (((vc
->vc_attr
) & 0x07) << 4);
2737 con_flush(vc
, draw_from
, draw_to
, &draw_x
);
2742 if (vc
->vc_need_wrap
|| vc
->vc_decim
)
2743 con_flush(vc
, draw_from
, draw_to
,
2745 if (vc
->vc_need_wrap
) {
2751 vc_uniscr_putc(vc
, next_c
);
2753 ((vc_attr
<< 8) & ~himask
) + ((tc
& 0x100) ? himask
: 0) + (tc
& 0xff) :
2754 (vc_attr
<< 8) + tc
,
2755 (u16
*) vc
->vc_pos
);
2756 if (con_should_update(vc
) && draw_x
< 0) {
2758 draw_from
= vc
->vc_pos
;
2760 if (vc
->vc_x
== vc
->vc_cols
- 1) {
2761 vc
->vc_need_wrap
= vc
->vc_decawm
;
2762 draw_to
= vc
->vc_pos
+ 2;
2765 draw_to
= (vc
->vc_pos
+= 2);
2768 if (!--width
) break;
2770 tc
= conv_uni_to_pc(vc
, ' '); /* A space is printed in the second column */
2771 if (tc
< 0) tc
= ' ';
2774 notify_write(vc
, c
);
2777 con_flush(vc
, draw_from
, draw_to
, &draw_x
);
2784 goto rescan_last_byte
;
2788 con_flush(vc
, draw_from
, draw_to
, &draw_x
);
2789 do_con_trol(tty
, vc
, orig
);
2791 con_flush(vc
, draw_from
, draw_to
, &draw_x
);
2792 vc_uniscr_debug_check(vc
);
2793 console_conditional_schedule();
2800 * This is the console switching callback.
2802 * Doing console switching in a process context allows
2803 * us to do the switches asynchronously (needed when we want
2804 * to switch due to a keyboard interrupt). Synchronization
2805 * with other console code and prevention of re-entrancy is
2806 * ensured with console_lock.
2808 static void console_callback(struct work_struct
*ignored
)
2812 if (want_console
>= 0) {
2813 if (want_console
!= fg_console
&&
2814 vc_cons_allocated(want_console
)) {
2815 hide_cursor(vc_cons
[fg_console
].d
);
2816 change_console(vc_cons
[want_console
].d
);
2817 /* we only changed when the console had already
2818 been allocated - a new console is not created
2819 in an interrupt routine */
2823 if (do_poke_blanked_console
) { /* do not unblank for a LED change */
2824 do_poke_blanked_console
= 0;
2825 poke_blanked_console();
2827 if (scrollback_delta
) {
2828 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
2830 if (vc
->vc_mode
== KD_TEXT
&& vc
->vc_sw
->con_scrolldelta
)
2831 vc
->vc_sw
->con_scrolldelta(vc
, scrollback_delta
);
2832 scrollback_delta
= 0;
2834 if (blank_timer_expired
) {
2836 blank_timer_expired
= 0;
2838 notify_update(vc_cons
[fg_console
].d
);
2843 int set_console(int nr
)
2845 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
2847 if (!vc_cons_allocated(nr
) || vt_dont_switch
||
2848 (vc
->vt_mode
.mode
== VT_AUTO
&& vc
->vc_mode
== KD_GRAPHICS
)) {
2851 * Console switch will fail in console_callback() or
2852 * change_console() so there is no point scheduling
2855 * Existing set_console() users don't check the return
2856 * value so this shouldn't break anything
2862 schedule_console_callback();
2867 struct tty_driver
*console_driver
;
2869 #ifdef CONFIG_VT_CONSOLE
2872 * vt_kmsg_redirect() - Sets/gets the kernel message console
2873 * @new: The new virtual terminal number or -1 if the console should stay
2876 * By default, the kernel messages are always printed on the current virtual
2877 * console. However, the user may modify that default with the
2878 * TIOCL_SETKMSGREDIRECT ioctl call.
2880 * This function sets the kernel message console to be @new. It returns the old
2881 * virtual console number. The virtual terminal number 0 (both as parameter and
2882 * return value) means no redirection (i.e. always printed on the currently
2885 * The parameter -1 means that only the current console is returned, but the
2886 * value is not modified. You may use the macro vt_get_kmsg_redirect() in that
2887 * case to make the code more understandable.
2889 * When the kernel is compiled without CONFIG_VT_CONSOLE, this function ignores
2890 * the parameter and always returns 0.
2892 int vt_kmsg_redirect(int new)
2894 static int kmsg_con
;
2897 return xchg(&kmsg_con
, new);
2903 * Console on virtual terminal
2905 * The console must be locked when we get here.
2908 static void vt_console_print(struct console
*co
, const char *b
, unsigned count
)
2910 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
2912 static DEFINE_SPINLOCK(printing_lock
);
2913 const ushort
*start
;
2914 ushort start_x
, cnt
;
2917 /* console busy or not yet initialized */
2920 if (!spin_trylock(&printing_lock
))
2923 kmsg_console
= vt_get_kmsg_redirect();
2924 if (kmsg_console
&& vc_cons_allocated(kmsg_console
- 1))
2925 vc
= vc_cons
[kmsg_console
- 1].d
;
2927 if (!vc_cons_allocated(fg_console
)) {
2929 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2933 if (vc
->vc_mode
!= KD_TEXT
)
2936 /* undraw cursor first */
2940 start
= (ushort
*)vc
->vc_pos
;
2945 if (c
== 10 || c
== 13 || c
== 8 || vc
->vc_need_wrap
) {
2946 if (cnt
&& con_is_visible(vc
))
2947 vc
->vc_sw
->con_putcs(vc
, start
, cnt
, vc
->vc_y
, start_x
);
2949 if (c
== 8) { /* backspace */
2951 start
= (ushort
*)vc
->vc_pos
;
2958 start
= (ushort
*)vc
->vc_pos
;
2960 if (c
== 10 || c
== 13)
2963 vc_uniscr_putc(vc
, c
);
2964 scr_writew((vc
->vc_attr
<< 8) + c
, (unsigned short *)vc
->vc_pos
);
2965 notify_write(vc
, c
);
2967 if (vc
->vc_x
== vc
->vc_cols
- 1) {
2968 vc
->vc_need_wrap
= 1;
2974 if (cnt
&& con_is_visible(vc
))
2975 vc
->vc_sw
->con_putcs(vc
, start
, cnt
, vc
->vc_y
, start_x
);
2980 spin_unlock(&printing_lock
);
2983 static struct tty_driver
*vt_console_device(struct console
*c
, int *index
)
2985 *index
= c
->index
? c
->index
-1 : fg_console
;
2986 return console_driver
;
2989 static struct console vt_console_driver
= {
2991 .write
= vt_console_print
,
2992 .device
= vt_console_device
,
2993 .unblank
= unblank_screen
,
2994 .flags
= CON_PRINTBUFFER
,
3000 * Handling of Linux-specific VC ioctls
3004 * Generally a bit racy with respect to console_lock();.
3006 * There are some functions which don't need it.
3008 * There are some functions which can sleep for arbitrary periods
3009 * (paste_selection) but we don't need the lock there anyway.
3011 * set_selection has locking, and definitely needs it
3014 int tioclinux(struct tty_struct
*tty
, unsigned long arg
)
3017 char __user
*p
= (char __user
*)arg
;
3021 if (current
->signal
->tty
!= tty
&& !capable(CAP_SYS_ADMIN
))
3023 if (get_user(type
, p
))
3031 ret
= set_selection((struct tiocl_selection __user
*)(p
+1), tty
);
3034 case TIOCL_PASTESEL
:
3035 ret
= paste_selection(tty
);
3037 case TIOCL_UNBLANKSCREEN
:
3042 case TIOCL_SELLOADLUT
:
3044 ret
= sel_loadlut(p
);
3047 case TIOCL_GETSHIFTSTATE
:
3050 * Make it possible to react to Shift+Mousebutton.
3051 * Note that 'shift_state' is an undocumented
3052 * kernel-internal variable; programs not closely
3053 * related to the kernel should not use this.
3055 data
= vt_get_shift_state();
3056 ret
= put_user(data
, p
);
3058 case TIOCL_GETMOUSEREPORTING
:
3059 console_lock(); /* May be overkill */
3060 data
= mouse_reporting();
3062 ret
= put_user(data
, p
);
3064 case TIOCL_SETVESABLANK
:
3066 ret
= set_vesa_blanking(p
);
3069 case TIOCL_GETKMSGREDIRECT
:
3070 data
= vt_get_kmsg_redirect();
3071 ret
= put_user(data
, p
);
3073 case TIOCL_SETKMSGREDIRECT
:
3074 if (!capable(CAP_SYS_ADMIN
)) {
3077 if (get_user(data
, p
+1))
3080 vt_kmsg_redirect(data
);
3083 case TIOCL_GETFGCONSOLE
:
3084 /* No locking needed as this is a transiently
3085 correct return anyway if the caller hasn't
3086 disabled switching */
3089 case TIOCL_SCROLLCONSOLE
:
3090 if (get_user(lines
, (s32 __user
*)(p
+4))) {
3093 /* Need the console lock here. Note that lots
3094 of other calls need fixing before the lock
3095 is actually useful ! */
3097 scrollfront(vc_cons
[fg_console
].d
, lines
);
3102 case TIOCL_BLANKSCREEN
: /* until explicitly unblanked, not only poked */
3108 case TIOCL_BLANKEDSCREEN
:
3109 ret
= console_blanked
;
3119 * /dev/ttyN handling
3122 static int con_write(struct tty_struct
*tty
, const unsigned char *buf
, int count
)
3126 retval
= do_con_write(tty
, buf
, count
);
3127 con_flush_chars(tty
);
3132 static int con_put_char(struct tty_struct
*tty
, unsigned char ch
)
3135 return 0; /* n_r3964 calls put_char() from interrupt context */
3136 return do_con_write(tty
, &ch
, 1);
3139 static int con_write_room(struct tty_struct
*tty
)
3143 return 32768; /* No limit, really; we're not buffering */
3146 static int con_chars_in_buffer(struct tty_struct
*tty
)
3148 return 0; /* we're not buffering */
3152 * con_throttle and con_unthrottle are only used for
3153 * paste_selection(), which has to stuff in a large number of
3156 static void con_throttle(struct tty_struct
*tty
)
3160 static void con_unthrottle(struct tty_struct
*tty
)
3162 struct vc_data
*vc
= tty
->driver_data
;
3164 wake_up_interruptible(&vc
->paste_wait
);
3168 * Turn the Scroll-Lock LED on when the tty is stopped
3170 static void con_stop(struct tty_struct
*tty
)
3175 console_num
= tty
->index
;
3176 if (!vc_cons_allocated(console_num
))
3178 vt_kbd_con_stop(console_num
);
3182 * Turn the Scroll-Lock LED off when the console is started
3184 static void con_start(struct tty_struct
*tty
)
3189 console_num
= tty
->index
;
3190 if (!vc_cons_allocated(console_num
))
3192 vt_kbd_con_start(console_num
);
3195 static void con_flush_chars(struct tty_struct
*tty
)
3199 if (in_interrupt()) /* from flush_to_ldisc */
3202 /* if we race with con_close(), vt may be null */
3204 vc
= tty
->driver_data
;
3211 * Allocate the console screen memory.
3213 static int con_install(struct tty_driver
*driver
, struct tty_struct
*tty
)
3215 unsigned int currcons
= tty
->index
;
3220 ret
= vc_allocate(currcons
);
3224 vc
= vc_cons
[currcons
].d
;
3226 /* Still being freed */
3232 ret
= tty_port_install(&vc
->port
, driver
, tty
);
3236 tty
->driver_data
= vc
;
3239 if (!tty
->winsize
.ws_row
&& !tty
->winsize
.ws_col
) {
3240 tty
->winsize
.ws_row
= vc_cons
[currcons
].d
->vc_rows
;
3241 tty
->winsize
.ws_col
= vc_cons
[currcons
].d
->vc_cols
;
3244 tty
->termios
.c_iflag
|= IUTF8
;
3246 tty
->termios
.c_iflag
&= ~IUTF8
;
3252 static int con_open(struct tty_struct
*tty
, struct file
*filp
)
3254 /* everything done in install */
3259 static void con_close(struct tty_struct
*tty
, struct file
*filp
)
3261 /* Nothing to do - we defer to shutdown */
3264 static void con_shutdown(struct tty_struct
*tty
)
3266 struct vc_data
*vc
= tty
->driver_data
;
3269 vc
->port
.tty
= NULL
;
3273 static int default_color
= 7; /* white */
3274 static int default_italic_color
= 2; // green (ASCII)
3275 static int default_underline_color
= 3; // cyan (ASCII)
3276 module_param_named(color
, default_color
, int, S_IRUGO
| S_IWUSR
);
3277 module_param_named(italic
, default_italic_color
, int, S_IRUGO
| S_IWUSR
);
3278 module_param_named(underline
, default_underline_color
, int, S_IRUGO
| S_IWUSR
);
3280 static void vc_init(struct vc_data
*vc
, unsigned int rows
,
3281 unsigned int cols
, int do_clear
)
3287 vc
->vc_size_row
= cols
<< 1;
3288 vc
->vc_screenbuf_size
= vc
->vc_rows
* vc
->vc_size_row
;
3291 vc
->vc_pos
= vc
->vc_origin
;
3293 for (j
=k
=0; j
<16; j
++) {
3294 vc
->vc_palette
[k
++] = default_red
[j
] ;
3295 vc
->vc_palette
[k
++] = default_grn
[j
] ;
3296 vc
->vc_palette
[k
++] = default_blu
[j
] ;
3298 vc
->vc_def_color
= default_color
;
3299 vc
->vc_ulcolor
= default_underline_color
;
3300 vc
->vc_itcolor
= default_italic_color
;
3301 vc
->vc_halfcolor
= 0x08; /* grey */
3302 init_waitqueue_head(&vc
->paste_wait
);
3303 reset_terminal(vc
, do_clear
);
3307 * This routine initializes console interrupts, and does nothing
3308 * else. If you want the screen to clear, call tty_write with
3309 * the appropriate escape-sequence.
3312 static int __init
con_init(void)
3314 const char *display_desc
= NULL
;
3316 unsigned int currcons
= 0, i
;
3321 display_desc
= conswitchp
->con_startup();
3322 if (!display_desc
) {
3328 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3329 struct con_driver
*con_driver
= ®istered_con_driver
[i
];
3331 if (con_driver
->con
== NULL
) {
3332 con_driver
->con
= conswitchp
;
3333 con_driver
->desc
= display_desc
;
3334 con_driver
->flag
= CON_DRIVER_FLAG_INIT
;
3335 con_driver
->first
= 0;
3336 con_driver
->last
= MAX_NR_CONSOLES
- 1;
3341 for (i
= 0; i
< MAX_NR_CONSOLES
; i
++)
3342 con_driver_map
[i
] = conswitchp
;
3344 if (blankinterval
) {
3345 blank_state
= blank_normal_wait
;
3346 mod_timer(&console_timer
, jiffies
+ (blankinterval
* HZ
));
3349 for (currcons
= 0; currcons
< MIN_NR_CONSOLES
; currcons
++) {
3350 vc_cons
[currcons
].d
= vc
= kzalloc(sizeof(struct vc_data
), GFP_NOWAIT
);
3351 INIT_WORK(&vc_cons
[currcons
].SAK_work
, vc_SAK
);
3352 tty_port_init(&vc
->port
);
3353 visual_init(vc
, currcons
, 1);
3354 vc
->vc_screenbuf
= kzalloc(vc
->vc_screenbuf_size
, GFP_NOWAIT
);
3355 vc_init(vc
, vc
->vc_rows
, vc
->vc_cols
,
3356 currcons
|| !vc
->vc_sw
->con_save_screen
);
3358 currcons
= fg_console
= 0;
3359 master_display_fg
= vc
= vc_cons
[currcons
].d
;
3362 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
);
3365 pr_info("Console: %s %s %dx%d\n",
3366 vc
->vc_can_do_color
? "colour" : "mono",
3367 display_desc
, vc
->vc_cols
, vc
->vc_rows
);
3372 #ifdef CONFIG_VT_CONSOLE
3373 register_console(&vt_console_driver
);
3377 console_initcall(con_init
);
3379 static const struct tty_operations con_ops
= {
3380 .install
= con_install
,
3384 .write_room
= con_write_room
,
3385 .put_char
= con_put_char
,
3386 .flush_chars
= con_flush_chars
,
3387 .chars_in_buffer
= con_chars_in_buffer
,
3389 #ifdef CONFIG_COMPAT
3390 .compat_ioctl
= vt_compat_ioctl
,
3394 .throttle
= con_throttle
,
3395 .unthrottle
= con_unthrottle
,
3396 .resize
= vt_resize
,
3397 .shutdown
= con_shutdown
3400 static struct cdev vc0_cdev
;
3402 static ssize_t
show_tty_active(struct device
*dev
,
3403 struct device_attribute
*attr
, char *buf
)
3405 return sprintf(buf
, "tty%d\n", fg_console
+ 1);
3407 static DEVICE_ATTR(active
, S_IRUGO
, show_tty_active
, NULL
);
3409 static struct attribute
*vt_dev_attrs
[] = {
3410 &dev_attr_active
.attr
,
3414 ATTRIBUTE_GROUPS(vt_dev
);
3416 int __init
vty_init(const struct file_operations
*console_fops
)
3418 cdev_init(&vc0_cdev
, console_fops
);
3419 if (cdev_add(&vc0_cdev
, MKDEV(TTY_MAJOR
, 0), 1) ||
3420 register_chrdev_region(MKDEV(TTY_MAJOR
, 0), 1, "/dev/vc/0") < 0)
3421 panic("Couldn't register /dev/tty0 driver\n");
3422 tty0dev
= device_create_with_groups(tty_class
, NULL
,
3423 MKDEV(TTY_MAJOR
, 0), NULL
,
3424 vt_dev_groups
, "tty0");
3425 if (IS_ERR(tty0dev
))
3430 console_driver
= alloc_tty_driver(MAX_NR_CONSOLES
);
3431 if (!console_driver
)
3432 panic("Couldn't allocate console driver\n");
3434 console_driver
->name
= "tty";
3435 console_driver
->name_base
= 1;
3436 console_driver
->major
= TTY_MAJOR
;
3437 console_driver
->minor_start
= 1;
3438 console_driver
->type
= TTY_DRIVER_TYPE_CONSOLE
;
3439 console_driver
->init_termios
= tty_std_termios
;
3441 console_driver
->init_termios
.c_iflag
|= IUTF8
;
3442 console_driver
->flags
= TTY_DRIVER_REAL_RAW
| TTY_DRIVER_RESET_TERMIOS
;
3443 tty_set_operations(console_driver
, &con_ops
);
3444 if (tty_register_driver(console_driver
))
3445 panic("Couldn't register console driver\n");
3448 #ifdef CONFIG_MDA_CONSOLE
3454 #ifndef VT_SINGLE_DRIVER
3456 static struct class *vtconsole_class
;
3458 static int do_bind_con_driver(const struct consw
*csw
, int first
, int last
,
3461 struct module
*owner
= csw
->owner
;
3462 const char *desc
= NULL
;
3463 struct con_driver
*con_driver
;
3464 int i
, j
= -1, k
= -1, retval
= -ENODEV
;
3466 if (!try_module_get(owner
))
3469 WARN_CONSOLE_UNLOCKED();
3471 /* check if driver is registered */
3472 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3473 con_driver
= ®istered_con_driver
[i
];
3475 if (con_driver
->con
== csw
) {
3476 desc
= con_driver
->desc
;
3485 if (!(con_driver
->flag
& CON_DRIVER_FLAG_INIT
)) {
3487 con_driver
->flag
|= CON_DRIVER_FLAG_INIT
;
3492 module_put(conswitchp
->owner
);
3494 __module_get(owner
);
3498 first
= max(first
, con_driver
->first
);
3499 last
= min(last
, con_driver
->last
);
3501 for (i
= first
; i
<= last
; i
++) {
3503 struct vc_data
*vc
= vc_cons
[i
].d
;
3505 if (con_driver_map
[i
])
3506 module_put(con_driver_map
[i
]->owner
);
3507 __module_get(owner
);
3508 con_driver_map
[i
] = csw
;
3510 if (!vc
|| !vc
->vc_sw
)
3515 if (con_is_visible(vc
)) {
3520 old_was_color
= vc
->vc_can_do_color
;
3521 vc
->vc_sw
->con_deinit(vc
);
3522 vc
->vc_origin
= (unsigned long)vc
->vc_screenbuf
;
3523 visual_init(vc
, i
, 0);
3527 /* If the console changed between mono <-> color, then
3528 * the attributes in the screenbuf will be wrong. The
3529 * following resets all attributes to something sane.
3531 if (old_was_color
!= vc
->vc_can_do_color
)
3532 clear_buffer_attributes(vc
);
3535 pr_info("Console: switching ");
3537 pr_cont("consoles %d-%d ", first
+ 1, last
+ 1);
3539 struct vc_data
*vc
= vc_cons
[j
].d
;
3541 pr_cont("to %s %s %dx%d\n",
3542 vc
->vc_can_do_color
? "colour" : "mono",
3543 desc
, vc
->vc_cols
, vc
->vc_rows
);
3550 pr_cont("to %s\n", desc
);
3560 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
3561 /* unlocked version of unbind_con_driver() */
3562 int do_unbind_con_driver(const struct consw
*csw
, int first
, int last
, int deflt
)
3564 struct module
*owner
= csw
->owner
;
3565 const struct consw
*defcsw
= NULL
;
3566 struct con_driver
*con_driver
= NULL
, *con_back
= NULL
;
3567 int i
, retval
= -ENODEV
;
3569 if (!try_module_get(owner
))
3572 WARN_CONSOLE_UNLOCKED();
3574 /* check if driver is registered and if it is unbindable */
3575 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3576 con_driver
= ®istered_con_driver
[i
];
3578 if (con_driver
->con
== csw
&&
3579 con_driver
->flag
& CON_DRIVER_FLAG_MODULE
) {
3590 /* check if backup driver exists */
3591 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3592 con_back
= ®istered_con_driver
[i
];
3594 if (con_back
->con
&& con_back
->con
!= csw
) {
3595 defcsw
= con_back
->con
;
3604 if (!con_is_bound(csw
))
3607 first
= max(first
, con_driver
->first
);
3608 last
= min(last
, con_driver
->last
);
3610 for (i
= first
; i
<= last
; i
++) {
3611 if (con_driver_map
[i
] == csw
) {
3612 module_put(csw
->owner
);
3613 con_driver_map
[i
] = NULL
;
3617 if (!con_is_bound(defcsw
)) {
3618 const struct consw
*defconsw
= conswitchp
;
3620 defcsw
->con_startup();
3621 con_back
->flag
|= CON_DRIVER_FLAG_INIT
;
3623 * vgacon may change the default driver to point
3624 * to dummycon, we restore it here...
3626 conswitchp
= defconsw
;
3629 if (!con_is_bound(csw
))
3630 con_driver
->flag
&= ~CON_DRIVER_FLAG_INIT
;
3632 /* ignore return value, binding should not fail */
3633 do_bind_con_driver(defcsw
, first
, last
, deflt
);
3639 EXPORT_SYMBOL_GPL(do_unbind_con_driver
);
3641 static int vt_bind(struct con_driver
*con
)
3643 const struct consw
*defcsw
= NULL
, *csw
= NULL
;
3644 int i
, more
= 1, first
= -1, last
= -1, deflt
= 0;
3646 if (!con
->con
|| !(con
->flag
& CON_DRIVER_FLAG_MODULE
))
3651 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3652 struct con_driver
*con
= ®istered_con_driver
[i
];
3654 if (con
->con
&& !(con
->flag
& CON_DRIVER_FLAG_MODULE
)) {
3666 for (i
= con
->first
; i
<= con
->last
; i
++) {
3667 if (con_driver_map
[i
] == defcsw
) {
3672 } else if (first
!= -1)
3676 if (first
== 0 && last
== MAX_NR_CONSOLES
-1)
3680 do_bind_con_driver(csw
, first
, last
, deflt
);
3691 static int vt_unbind(struct con_driver
*con
)
3693 const struct consw
*csw
= NULL
;
3694 int i
, more
= 1, first
= -1, last
= -1, deflt
= 0;
3697 if (!con
->con
|| !(con
->flag
& CON_DRIVER_FLAG_MODULE
))
3705 for (i
= con
->first
; i
<= con
->last
; i
++) {
3706 if (con_driver_map
[i
] == csw
) {
3711 } else if (first
!= -1)
3715 if (first
== 0 && last
== MAX_NR_CONSOLES
-1)
3719 ret
= do_unbind_con_driver(csw
, first
, last
, deflt
);
3733 static inline int vt_bind(struct con_driver
*con
)
3737 static inline int vt_unbind(struct con_driver
*con
)
3741 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3743 static ssize_t
store_bind(struct device
*dev
, struct device_attribute
*attr
,
3744 const char *buf
, size_t count
)
3746 struct con_driver
*con
= dev_get_drvdata(dev
);
3747 int bind
= simple_strtoul(buf
, NULL
, 0);
3761 static ssize_t
show_bind(struct device
*dev
, struct device_attribute
*attr
,
3764 struct con_driver
*con
= dev_get_drvdata(dev
);
3765 int bind
= con_is_bound(con
->con
);
3767 return snprintf(buf
, PAGE_SIZE
, "%i\n", bind
);
3770 static ssize_t
show_name(struct device
*dev
, struct device_attribute
*attr
,
3773 struct con_driver
*con
= dev_get_drvdata(dev
);
3775 return snprintf(buf
, PAGE_SIZE
, "%s %s\n",
3776 (con
->flag
& CON_DRIVER_FLAG_MODULE
) ? "(M)" : "(S)",
3781 static DEVICE_ATTR(bind
, S_IRUGO
|S_IWUSR
, show_bind
, store_bind
);
3782 static DEVICE_ATTR(name
, S_IRUGO
, show_name
, NULL
);
3784 static struct attribute
*con_dev_attrs
[] = {
3785 &dev_attr_bind
.attr
,
3786 &dev_attr_name
.attr
,
3790 ATTRIBUTE_GROUPS(con_dev
);
3792 static int vtconsole_init_device(struct con_driver
*con
)
3794 con
->flag
|= CON_DRIVER_FLAG_ATTR
;
3798 static void vtconsole_deinit_device(struct con_driver
*con
)
3800 con
->flag
&= ~CON_DRIVER_FLAG_ATTR
;
3804 * con_is_bound - checks if driver is bound to the console
3805 * @csw: console driver
3807 * RETURNS: zero if unbound, nonzero if bound
3809 * Drivers can call this and if zero, they should release
3810 * all resources allocated on con_startup()
3812 int con_is_bound(const struct consw
*csw
)
3816 for (i
= 0; i
< MAX_NR_CONSOLES
; i
++) {
3817 if (con_driver_map
[i
] == csw
) {
3825 EXPORT_SYMBOL(con_is_bound
);
3828 * con_debug_enter - prepare the console for the kernel debugger
3829 * @sw: console driver
3831 * Called when the console is taken over by the kernel debugger, this
3832 * function needs to save the current console state, then put the console
3833 * into a state suitable for the kernel debugger.
3836 * Zero on success, nonzero if a failure occurred when trying to prepare
3837 * the console for the debugger.
3839 int con_debug_enter(struct vc_data
*vc
)
3843 saved_fg_console
= fg_console
;
3844 saved_last_console
= last_console
;
3845 saved_want_console
= want_console
;
3846 saved_vc_mode
= vc
->vc_mode
;
3847 saved_console_blanked
= console_blanked
;
3848 vc
->vc_mode
= KD_TEXT
;
3849 console_blanked
= 0;
3850 if (vc
->vc_sw
->con_debug_enter
)
3851 ret
= vc
->vc_sw
->con_debug_enter(vc
);
3852 #ifdef CONFIG_KGDB_KDB
3853 /* Set the initial LINES variable if it is not already set */
3854 if (vc
->vc_rows
< 999) {
3857 const char *setargs
[3] = {
3862 if (kdbgetintenv(setargs
[0], &linecount
)) {
3863 snprintf(lns
, 4, "%i", vc
->vc_rows
);
3864 kdb_set(2, setargs
);
3867 if (vc
->vc_cols
< 999) {
3870 const char *setargs
[3] = {
3875 if (kdbgetintenv(setargs
[0], &colcount
)) {
3876 snprintf(cols
, 4, "%i", vc
->vc_cols
);
3877 kdb_set(2, setargs
);
3880 #endif /* CONFIG_KGDB_KDB */
3883 EXPORT_SYMBOL_GPL(con_debug_enter
);
3886 * con_debug_leave - restore console state
3887 * @sw: console driver
3889 * Restore the console state to what it was before the kernel debugger
3893 * Zero on success, nonzero if a failure occurred when trying to restore
3896 int con_debug_leave(void)
3901 fg_console
= saved_fg_console
;
3902 last_console
= saved_last_console
;
3903 want_console
= saved_want_console
;
3904 console_blanked
= saved_console_blanked
;
3905 vc_cons
[fg_console
].d
->vc_mode
= saved_vc_mode
;
3907 vc
= vc_cons
[fg_console
].d
;
3908 if (vc
->vc_sw
->con_debug_leave
)
3909 ret
= vc
->vc_sw
->con_debug_leave(vc
);
3912 EXPORT_SYMBOL_GPL(con_debug_leave
);
3914 static int do_register_con_driver(const struct consw
*csw
, int first
, int last
)
3916 struct module
*owner
= csw
->owner
;
3917 struct con_driver
*con_driver
;
3921 WARN_CONSOLE_UNLOCKED();
3923 if (!try_module_get(owner
))
3926 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3927 con_driver
= ®istered_con_driver
[i
];
3929 /* already registered */
3930 if (con_driver
->con
== csw
) {
3936 desc
= csw
->con_startup();
3944 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3945 con_driver
= ®istered_con_driver
[i
];
3947 if (con_driver
->con
== NULL
&&
3948 !(con_driver
->flag
& CON_DRIVER_FLAG_ZOMBIE
)) {
3949 con_driver
->con
= csw
;
3950 con_driver
->desc
= desc
;
3951 con_driver
->node
= i
;
3952 con_driver
->flag
= CON_DRIVER_FLAG_MODULE
|
3953 CON_DRIVER_FLAG_INIT
;
3954 con_driver
->first
= first
;
3955 con_driver
->last
= last
;
3965 device_create_with_groups(vtconsole_class
, NULL
,
3966 MKDEV(0, con_driver
->node
),
3967 con_driver
, con_dev_groups
,
3968 "vtcon%i", con_driver
->node
);
3969 if (IS_ERR(con_driver
->dev
)) {
3970 pr_warn("Unable to create device for %s; errno = %ld\n",
3971 con_driver
->desc
, PTR_ERR(con_driver
->dev
));
3972 con_driver
->dev
= NULL
;
3974 vtconsole_init_device(con_driver
);
3984 * do_unregister_con_driver - unregister console driver from console layer
3985 * @csw: console driver
3987 * DESCRIPTION: All drivers that registers to the console layer must
3988 * call this function upon exit, or if the console driver is in a state
3989 * where it won't be able to handle console services, such as the
3990 * framebuffer console without loaded framebuffer drivers.
3992 * The driver must unbind first prior to unregistration.
3994 int do_unregister_con_driver(const struct consw
*csw
)
3998 /* cannot unregister a bound driver */
3999 if (con_is_bound(csw
))
4002 if (csw
== conswitchp
)
4005 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
4006 struct con_driver
*con_driver
= ®istered_con_driver
[i
];
4008 if (con_driver
->con
== csw
) {
4010 * Defer the removal of the sysfs entries since that
4011 * will acquire the kernfs s_active lock and we can't
4012 * acquire this lock while holding the console lock:
4013 * the unbind sysfs entry imposes already the opposite
4014 * order. Reset con already here to prevent any later
4015 * lookup to succeed and mark this slot as zombie, so
4016 * it won't get reused until we complete the removal
4017 * in the deferred work.
4019 con_driver
->con
= NULL
;
4020 con_driver
->flag
= CON_DRIVER_FLAG_ZOMBIE
;
4021 schedule_work(&con_driver_unregister_work
);
4029 EXPORT_SYMBOL_GPL(do_unregister_con_driver
);
4031 static void con_driver_unregister_callback(struct work_struct
*ignored
)
4037 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
4038 struct con_driver
*con_driver
= ®istered_con_driver
[i
];
4040 if (!(con_driver
->flag
& CON_DRIVER_FLAG_ZOMBIE
))
4045 vtconsole_deinit_device(con_driver
);
4046 device_destroy(vtconsole_class
, MKDEV(0, con_driver
->node
));
4050 if (WARN_ON_ONCE(con_driver
->con
))
4051 con_driver
->con
= NULL
;
4052 con_driver
->desc
= NULL
;
4053 con_driver
->dev
= NULL
;
4054 con_driver
->node
= 0;
4055 WARN_ON_ONCE(con_driver
->flag
!= CON_DRIVER_FLAG_ZOMBIE
);
4056 con_driver
->flag
= 0;
4057 con_driver
->first
= 0;
4058 con_driver
->last
= 0;
4065 * If we support more console drivers, this function is used
4066 * when a driver wants to take over some existing consoles
4067 * and become default driver for newly opened ones.
4069 * do_take_over_console is basically a register followed by unbind
4071 int do_take_over_console(const struct consw
*csw
, int first
, int last
, int deflt
)
4075 err
= do_register_con_driver(csw
, first
, last
);
4077 * If we get an busy error we still want to bind the console driver
4078 * and return success, as we may have unbound the console driver
4079 * but not unregistered it.
4084 do_bind_con_driver(csw
, first
, last
, deflt
);
4088 EXPORT_SYMBOL_GPL(do_take_over_console
);
4092 * give_up_console is a wrapper to unregister_con_driver. It will only
4093 * work if driver is fully unbound.
4095 void give_up_console(const struct consw
*csw
)
4098 do_unregister_con_driver(csw
);
4102 static int __init
vtconsole_class_init(void)
4106 vtconsole_class
= class_create(THIS_MODULE
, "vtconsole");
4107 if (IS_ERR(vtconsole_class
)) {
4108 pr_warn("Unable to create vt console class; errno = %ld\n",
4109 PTR_ERR(vtconsole_class
));
4110 vtconsole_class
= NULL
;
4113 /* Add system drivers to sysfs */
4114 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
4115 struct con_driver
*con
= ®istered_con_driver
[i
];
4117 if (con
->con
&& !con
->dev
) {
4119 device_create_with_groups(vtconsole_class
, NULL
,
4120 MKDEV(0, con
->node
),
4121 con
, con_dev_groups
,
4122 "vtcon%i", con
->node
);
4124 if (IS_ERR(con
->dev
)) {
4125 pr_warn("Unable to create device for %s; errno = %ld\n",
4126 con
->desc
, PTR_ERR(con
->dev
));
4129 vtconsole_init_device(con
);
4136 postcore_initcall(vtconsole_class_init
);
4144 static int set_vesa_blanking(char __user
*p
)
4148 if (get_user(mode
, p
+ 1))
4151 vesa_blank_mode
= (mode
< 4) ? mode
: 0;
4155 void do_blank_screen(int entering_gfx
)
4157 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
4160 WARN_CONSOLE_UNLOCKED();
4162 if (console_blanked
) {
4163 if (blank_state
== blank_vesa_wait
) {
4164 blank_state
= blank_off
;
4165 vc
->vc_sw
->con_blank(vc
, vesa_blank_mode
+ 1, 0);
4170 /* entering graphics mode? */
4174 vc
->vc_sw
->con_blank(vc
, -1, 1);
4175 console_blanked
= fg_console
+ 1;
4176 blank_state
= blank_off
;
4181 if (blank_state
!= blank_normal_wait
)
4183 blank_state
= blank_off
;
4185 /* don't blank graphics */
4186 if (vc
->vc_mode
!= KD_TEXT
) {
4187 console_blanked
= fg_console
+ 1;
4192 del_timer_sync(&console_timer
);
4193 blank_timer_expired
= 0;
4196 /* In case we need to reset origin, blanking hook returns 1 */
4197 i
= vc
->vc_sw
->con_blank(vc
, vesa_off_interval
? 1 : (vesa_blank_mode
+ 1), 0);
4198 console_blanked
= fg_console
+ 1;
4202 if (console_blank_hook
&& console_blank_hook(1))
4205 if (vesa_off_interval
&& vesa_blank_mode
) {
4206 blank_state
= blank_vesa_wait
;
4207 mod_timer(&console_timer
, jiffies
+ vesa_off_interval
);
4209 vt_event_post(VT_EVENT_BLANK
, vc
->vc_num
, vc
->vc_num
);
4211 EXPORT_SYMBOL(do_blank_screen
);
4214 * Called by timer as well as from vt_console_driver
4216 void do_unblank_screen(int leaving_gfx
)
4220 /* This should now always be called from a "sane" (read: can schedule)
4221 * context for the sake of the low level drivers, except in the special
4222 * case of oops_in_progress
4224 if (!oops_in_progress
)
4227 WARN_CONSOLE_UNLOCKED();
4230 if (!console_blanked
)
4232 if (!vc_cons_allocated(fg_console
)) {
4234 pr_warn("unblank_screen: tty %d not allocated ??\n",
4238 vc
= vc_cons
[fg_console
].d
;
4239 if (vc
->vc_mode
!= KD_TEXT
)
4240 return; /* but leave console_blanked != 0 */
4242 if (blankinterval
) {
4243 mod_timer(&console_timer
, jiffies
+ (blankinterval
* HZ
));
4244 blank_state
= blank_normal_wait
;
4247 console_blanked
= 0;
4248 if (vc
->vc_sw
->con_blank(vc
, 0, leaving_gfx
))
4249 /* Low-level driver cannot restore -> do it ourselves */
4251 if (console_blank_hook
)
4252 console_blank_hook(0);
4255 vt_event_post(VT_EVENT_UNBLANK
, vc
->vc_num
, vc
->vc_num
);
4257 EXPORT_SYMBOL(do_unblank_screen
);
4260 * This is called by the outside world to cause a forced unblank, mostly for
4261 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
4262 * call it with 1 as an argument and so force a mode restore... that may kill
4263 * X or at least garbage the screen but would also make the Oops visible...
4265 void unblank_screen(void)
4267 do_unblank_screen(0);
4271 * We defer the timer blanking to work queue so it can take the console mutex
4272 * (console operations can still happen at irq time, but only from printk which
4273 * has the console mutex. Not perfect yet, but better than no locking
4275 static void blank_screen_t(struct timer_list
*unused
)
4277 blank_timer_expired
= 1;
4278 schedule_work(&console_work
);
4281 void poke_blanked_console(void)
4283 WARN_CONSOLE_UNLOCKED();
4285 /* Add this so we quickly catch whoever might call us in a non
4286 * safe context. Nowadays, unblank_screen() isn't to be called in
4287 * atomic contexts and is allowed to schedule (with the special case
4288 * of oops_in_progress, but that isn't of any concern for this
4293 /* This isn't perfectly race free, but a race here would be mostly harmless,
4294 * at worse, we'll do a spurrious blank and it's unlikely
4296 del_timer(&console_timer
);
4297 blank_timer_expired
= 0;
4299 if (ignore_poke
|| !vc_cons
[fg_console
].d
|| vc_cons
[fg_console
].d
->vc_mode
== KD_GRAPHICS
)
4301 if (console_blanked
)
4303 else if (blankinterval
) {
4304 mod_timer(&console_timer
, jiffies
+ (blankinterval
* HZ
));
4305 blank_state
= blank_normal_wait
;
4313 static void set_palette(struct vc_data
*vc
)
4315 WARN_CONSOLE_UNLOCKED();
4317 if (vc
->vc_mode
!= KD_GRAPHICS
&& vc
->vc_sw
->con_set_palette
)
4318 vc
->vc_sw
->con_set_palette(vc
, color_table
);
4322 * Load palette into the DAC registers. arg points to a colour
4323 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
4326 int con_set_cmap(unsigned char __user
*arg
)
4329 unsigned char colormap
[3*16];
4331 if (copy_from_user(colormap
, arg
, sizeof(colormap
)))
4335 for (i
= k
= 0; i
< 16; i
++) {
4336 default_red
[i
] = colormap
[k
++];
4337 default_grn
[i
] = colormap
[k
++];
4338 default_blu
[i
] = colormap
[k
++];
4340 for (i
= 0; i
< MAX_NR_CONSOLES
; i
++) {
4341 if (!vc_cons_allocated(i
))
4343 for (j
= k
= 0; j
< 16; j
++) {
4344 vc_cons
[i
].d
->vc_palette
[k
++] = default_red
[j
];
4345 vc_cons
[i
].d
->vc_palette
[k
++] = default_grn
[j
];
4346 vc_cons
[i
].d
->vc_palette
[k
++] = default_blu
[j
];
4348 set_palette(vc_cons
[i
].d
);
4355 int con_get_cmap(unsigned char __user
*arg
)
4358 unsigned char colormap
[3*16];
4361 for (i
= k
= 0; i
< 16; i
++) {
4362 colormap
[k
++] = default_red
[i
];
4363 colormap
[k
++] = default_grn
[i
];
4364 colormap
[k
++] = default_blu
[i
];
4368 if (copy_to_user(arg
, colormap
, sizeof(colormap
)))
4374 void reset_palette(struct vc_data
*vc
)
4377 for (j
=k
=0; j
<16; j
++) {
4378 vc
->vc_palette
[k
++] = default_red
[j
];
4379 vc
->vc_palette
[k
++] = default_grn
[j
];
4380 vc
->vc_palette
[k
++] = default_blu
[j
];
4388 * Currently we only support fonts up to 32 pixels wide, at a maximum height
4389 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
4390 * depending on width) reserved for each character which is kinda wasty, but
4391 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
4392 * is up to the actual low-level console-driver convert data into its favorite
4393 * format (maybe we should add a `fontoffset' field to the `display'
4394 * structure so we won't have to convert the fontdata all the time.
4398 #define max_font_size 65536
4400 static int con_font_get(struct vc_data
*vc
, struct console_font_op
*op
)
4402 struct console_font font
;
4407 font
.data
= kmalloc(max_font_size
, GFP_KERNEL
);
4414 if (vc
->vc_mode
!= KD_TEXT
)
4416 else if (vc
->vc_sw
->con_font_get
)
4417 rc
= vc
->vc_sw
->con_font_get(vc
, &font
);
4425 c
= (font
.width
+7)/8 * 32 * font
.charcount
;
4427 if (op
->data
&& font
.charcount
> op
->charcount
)
4429 if (!(op
->flags
& KD_FONT_FLAG_OLD
)) {
4430 if (font
.width
> op
->width
|| font
.height
> op
->height
)
4433 if (font
.width
!= 8)
4435 else if ((op
->height
&& font
.height
> op
->height
) ||
4442 op
->height
= font
.height
;
4443 op
->width
= font
.width
;
4444 op
->charcount
= font
.charcount
;
4446 if (op
->data
&& copy_to_user(op
->data
, font
.data
, c
))
4454 static int con_font_set(struct vc_data
*vc
, struct console_font_op
*op
)
4456 struct console_font font
;
4460 if (vc
->vc_mode
!= KD_TEXT
)
4464 if (op
->charcount
> 512)
4466 if (op
->width
<= 0 || op
->width
> 32 || op
->height
> 32)
4468 size
= (op
->width
+7)/8 * 32 * op
->charcount
;
4469 if (size
> max_font_size
)
4472 font
.data
= memdup_user(op
->data
, size
);
4473 if (IS_ERR(font
.data
))
4474 return PTR_ERR(font
.data
);
4476 if (!op
->height
) { /* Need to guess font height [compat] */
4478 u8
*charmap
= font
.data
;
4481 * If from KDFONTOP ioctl, don't allow things which can be done
4482 * in userland,so that we can get rid of this soon
4484 if (!(op
->flags
& KD_FONT_FLAG_OLD
)) {
4489 for (h
= 32; h
> 0; h
--)
4490 for (i
= 0; i
< op
->charcount
; i
++)
4491 if (charmap
[32*i
+h
-1])
4501 font
.charcount
= op
->charcount
;
4502 font
.width
= op
->width
;
4503 font
.height
= op
->height
;
4506 if (vc
->vc_mode
!= KD_TEXT
)
4508 else if (vc
->vc_sw
->con_font_set
)
4509 rc
= vc
->vc_sw
->con_font_set(vc
, &font
, op
->flags
);
4517 static int con_font_default(struct vc_data
*vc
, struct console_font_op
*op
)
4519 struct console_font font
= {.width
= op
->width
, .height
= op
->height
};
4520 char name
[MAX_FONT_NAME
];
4527 else if (strncpy_from_user(name
, op
->data
, MAX_FONT_NAME
- 1) < 0)
4530 name
[MAX_FONT_NAME
- 1] = 0;
4533 if (vc
->vc_mode
!= KD_TEXT
) {
4537 if (vc
->vc_sw
->con_font_default
)
4538 rc
= vc
->vc_sw
->con_font_default(vc
, &font
, s
);
4543 op
->width
= font
.width
;
4544 op
->height
= font
.height
;
4549 static int con_font_copy(struct vc_data
*vc
, struct console_font_op
*op
)
4551 int con
= op
->height
;
4556 if (vc
->vc_mode
!= KD_TEXT
)
4558 else if (!vc
->vc_sw
->con_font_copy
)
4560 else if (con
< 0 || !vc_cons_allocated(con
))
4562 else if (con
== vc
->vc_num
) /* nothing to do */
4565 rc
= vc
->vc_sw
->con_font_copy(vc
, con
);
4570 int con_font_op(struct vc_data
*vc
, struct console_font_op
*op
)
4573 case KD_FONT_OP_SET
:
4574 return con_font_set(vc
, op
);
4575 case KD_FONT_OP_GET
:
4576 return con_font_get(vc
, op
);
4577 case KD_FONT_OP_SET_DEFAULT
:
4578 return con_font_default(vc
, op
);
4579 case KD_FONT_OP_COPY
:
4580 return con_font_copy(vc
, op
);
4586 * Interface exported to selection and vcs.
4589 /* used by selection */
4590 u16
screen_glyph(struct vc_data
*vc
, int offset
)
4592 u16 w
= scr_readw(screenpos(vc
, offset
, 1));
4595 if (w
& vc
->vc_hi_font_mask
)
4599 EXPORT_SYMBOL_GPL(screen_glyph
);
4601 u32
screen_glyph_unicode(struct vc_data
*vc
, int n
)
4603 struct uni_screen
*uniscr
= get_vc_uniscr(vc
);
4606 return uniscr
->lines
[n
/ vc
->vc_cols
][n
% vc
->vc_cols
];
4607 return inverse_translate(vc
, screen_glyph(vc
, n
* 2), 1);
4609 EXPORT_SYMBOL_GPL(screen_glyph_unicode
);
4611 /* used by vcs - note the word offset */
4612 unsigned short *screen_pos(struct vc_data
*vc
, int w_offset
, int viewed
)
4614 return screenpos(vc
, 2 * w_offset
, viewed
);
4616 EXPORT_SYMBOL_GPL(screen_pos
);
4618 void getconsxy(struct vc_data
*vc
, unsigned char *p
)
4620 /* clamp values if they don't fit */
4621 p
[0] = min(vc
->vc_x
, 0xFFu
);
4622 p
[1] = min(vc
->vc_y
, 0xFFu
);
4625 void putconsxy(struct vc_data
*vc
, unsigned char *p
)
4628 gotoxy(vc
, p
[0], p
[1]);
4632 u16
vcs_scr_readw(struct vc_data
*vc
, const u16
*org
)
4634 if ((unsigned long)org
== vc
->vc_pos
&& softcursor_original
!= -1)
4635 return softcursor_original
;
4636 return scr_readw(org
);
4639 void vcs_scr_writew(struct vc_data
*vc
, u16 val
, u16
*org
)
4641 scr_writew(val
, org
);
4642 if ((unsigned long)org
== vc
->vc_pos
) {
4643 softcursor_original
= -1;
4648 void vcs_scr_updated(struct vc_data
*vc
)
4653 void vc_scrolldelta_helper(struct vc_data
*c
, int lines
,
4654 unsigned int rolled_over
, void *base
, unsigned int size
)
4656 unsigned long ubase
= (unsigned long)base
;
4657 ptrdiff_t scr_end
= (void *)c
->vc_scr_end
- base
;
4658 ptrdiff_t vorigin
= (void *)c
->vc_visible_origin
- base
;
4659 ptrdiff_t origin
= (void *)c
->vc_origin
- base
;
4660 int margin
= c
->vc_size_row
* 4;
4661 int from
, wrap
, from_off
, avail
;
4663 /* Turn scrollback off */
4665 c
->vc_visible_origin
= c
->vc_origin
;
4669 /* Do we have already enough to allow jumping from 0 to the end? */
4670 if (rolled_over
> scr_end
+ margin
) {
4672 wrap
= rolled_over
+ c
->vc_size_row
;
4678 from_off
= (vorigin
- from
+ wrap
) % wrap
+ lines
* c
->vc_size_row
;
4679 avail
= (origin
- from
+ wrap
) % wrap
;
4681 /* Only a little piece would be left? Show all incl. the piece! */
4682 if (avail
< 2 * margin
)
4684 if (from_off
< margin
)
4686 if (from_off
> avail
- margin
)
4689 c
->vc_visible_origin
= ubase
+ (from
+ from_off
) % wrap
;
4691 EXPORT_SYMBOL_GPL(vc_scrolldelta_helper
);
4694 * Visible symbols for modules
4697 EXPORT_SYMBOL(color_table
);
4698 EXPORT_SYMBOL(default_red
);
4699 EXPORT_SYMBOL(default_grn
);
4700 EXPORT_SYMBOL(default_blu
);
4701 EXPORT_SYMBOL(update_region
);
4702 EXPORT_SYMBOL(redraw_screen
);
4703 EXPORT_SYMBOL(vc_resize
);
4704 EXPORT_SYMBOL(fg_console
);
4705 EXPORT_SYMBOL(console_blank_hook
);
4706 EXPORT_SYMBOL(console_blanked
);
4707 EXPORT_SYMBOL(vc_cons
);
4708 EXPORT_SYMBOL(global_cursor_default
);
4709 #ifndef VT_SINGLE_DRIVER
4710 EXPORT_SYMBOL(give_up_console
);