2 * linux/drivers/char/vt.c
4 * Copyright (C) 1991, 1992 Linus Torvalds
8 * Hopefully this will be a rather complete VT102 implementation.
10 * Beeping thanks to John T Kohl.
12 * Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics
13 * Chars, and VT100 enhancements by Peter MacDonald.
15 * Copy and paste function by Andrew Haylett,
16 * some enhancements by Alessandro Rubini.
18 * Code to check for different video-cards mostly by Galen Hunt,
19 * <g-hunt@ee.utah.edu>
21 * Rudimentary ISO 10646/Unicode/UTF-8 character set support by
22 * Markus Kuhn, <mskuhn@immd4.informatik.uni-erlangen.de>.
24 * Dynamic allocation of consoles, aeb@cwi.nl, May 1994
25 * Resizing of consoles, aeb, 940926
27 * Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94
30 * User-defined bell sound, new setterm control sequences and printk
31 * redirection by Martin Mares <mj@k332.feld.cvut.cz> 19-Nov-95
33 * APM screenblank bug fixed Takashi Manabe <manabe@roy.dsl.tutics.tut.jp>
35 * Merge with the abstract console driver by Geert Uytterhoeven
36 * <geert@linux-m68k.org>, Jan 1997.
38 * Original m68k console driver modifications by
40 * - Arno Griffioen <arno@usn.nl>
41 * - David Carter <carter@cs.bris.ac.uk>
43 * The abstract console driver provides a generic interface for a text
44 * console. It supports VGA text mode, frame buffer based graphical consoles
45 * and special graphics processors that are only accessible through some
46 * registers (e.g. a TMS340x0 GSP).
48 * The interface to the hardware is specified using a special structure
49 * (struct consw) which contains function pointers to console operations
50 * (see <linux/console.h> for more information).
52 * Support for changeable cursor shape
53 * by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997
55 * Ported to i386 and con_scrolldelta fixed
56 * by Emmanuel Marty <core@ggi-project.org>, April 1998
58 * Resurrected character buffers in videoram plus lots of other trickery
59 * by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998
61 * Removed old-style timers, introduced console_timer, made timer
62 * deletion SMP-safe. 17Jun00, Andrew Morton
64 * Removed console_lock, enabled interrupts across all console operations
65 * 13 March 2001, Andrew Morton
67 * Fixed UTF-8 mode so alternate charset modes always work according
68 * to control sequences interpreted in do_con_trol function
69 * preserving backward VT100 semigraphics compatibility,
70 * malformed UTF sequences represented as sequences of replacement glyphs,
71 * original codes or '?' as a last resort if replacement glyph is undefined
72 * by Adam Tla/lka <atlka@pg.gda.pl>, Aug 2006
75 #include <linux/module.h>
76 #include <linux/types.h>
77 #include <linux/sched.h>
78 #include <linux/tty.h>
79 #include <linux/tty_flip.h>
80 #include <linux/kernel.h>
81 #include <linux/string.h>
82 #include <linux/errno.h>
84 #include <linux/slab.h>
85 #include <linux/major.h>
87 #include <linux/console.h>
88 #include <linux/init.h>
89 #include <linux/mutex.h>
90 #include <linux/vt_kern.h>
91 #include <linux/selection.h>
92 #include <linux/smp_lock.h>
93 #include <linux/tiocl.h>
94 #include <linux/kbd_kern.h>
95 #include <linux/consolemap.h>
96 #include <linux/timer.h>
97 #include <linux/interrupt.h>
98 #include <linux/workqueue.h>
100 #include <linux/font.h>
101 #include <linux/bitops.h>
102 #include <linux/notifier.h>
103 #include <linux/device.h>
104 #include <linux/io.h>
105 #include <asm/system.h>
106 #include <linux/uaccess.h>
107 #include <linux/kdb.h>
108 #include <linux/ctype.h>
109 #include <linux/screen_info.h>
111 #define MAX_NR_CON_DRIVER 16
113 #define CON_DRIVER_FLAG_MODULE 1
114 #define CON_DRIVER_FLAG_INIT 2
115 #define CON_DRIVER_FLAG_ATTR 4
118 const struct consw *con;
127 static struct con_driver registered_con_driver[MAX_NR_CON_DRIVER];
128 const struct consw *conswitchp;
130 /* A bitmap for codes <32. A bit of 1 indicates that the code
131 * corresponding to that bit number invokes some special action
132 * (such as cursor movement) and should not be displayed as a
133 * glyph unless the disp_ctrl mode is explicitly enabled.
135 #define CTRL_ACTION 0x0d00ff81
136 #define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */
139 * Here is the default bell parameters: 750HZ, 1/8th of a second
141 #define DEFAULT_BELL_PITCH 750
142 #define DEFAULT_BELL_DURATION (HZ/8)
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, int mode);
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 blank_screen_t(unsigned long dummy);
162 static void set_palette(struct vc_data *vc);
164 static int printable; /* Is console ready for printing? */
165 int default_utf8 = true;
166 module_param(default_utf8, int, S_IRUGO | S_IWUSR);
167 int global_cursor_default = -1;
168 module_param(global_cursor_default, int, S_IRUGO | S_IWUSR);
170 static int cur_default = CUR_DEFAULT;
171 module_param(cur_default, int, S_IRUGO | S_IWUSR);
174 module_param_named(handoff, vt_handoff, 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 = 10*60;
188 core_param(consoleblank, blankinterval, int, 0444);
190 static DECLARE_WORK(console_work, console_callback);
193 * fg_console is the current virtual console,
194 * last_console is the last used one,
195 * want_console is the console we want to switch to,
196 * saved_* variants are for save/restore around kernel debugger enter/leave
200 int want_console = -1;
201 static int saved_fg_console;
202 static int saved_last_console;
203 static int saved_want_console;
204 static int saved_vc_mode;
205 static int saved_console_blanked;
208 * For each existing display, we have a pointer to console currently visible
209 * on that display, allowing consoles other than fg_console to be refreshed
210 * appropriately. Unless the low-level driver supplies its own display_fg
211 * variable, we use this one for the "master display".
213 static struct vc_data *master_display_fg;
216 * Unfortunately, we need to delay tty echo when we're currently writing to the
217 * console since the code is (and always was) not re-entrant, so we schedule
218 * all flip requests to process context with schedule-task() and run it from
219 * console_callback().
223 * For the same reason, we defer scrollback to the console callback.
225 static int scrollback_delta;
228 * Hook so that the power management routines can (un)blank
229 * the console on our behalf.
231 int (*console_blank_hook)(int);
233 static DEFINE_TIMER(console_timer, blank_screen_t, 0, 0);
234 static int blank_state;
235 static int blank_timer_expired;
243 * /sys/class/tty/tty0/
245 * the attribute 'active' contains the name of the current vc
246 * console and it supports poll() to detect vc switches
248 static struct device *tty0dev;
251 * Notifier list for console events.
253 static ATOMIC_NOTIFIER_HEAD(vt_notifier_list);
255 int register_vt_notifier(struct notifier_block *nb)
257 return atomic_notifier_chain_register(&vt_notifier_list, nb);
259 EXPORT_SYMBOL_GPL(register_vt_notifier);
261 int unregister_vt_notifier(struct notifier_block *nb)
263 return atomic_notifier_chain_unregister(&vt_notifier_list, nb);
265 EXPORT_SYMBOL_GPL(unregister_vt_notifier);
267 static void notify_write(struct vc_data *vc, unsigned int unicode)
269 struct vt_notifier_param param = { .vc = vc, unicode = unicode };
270 atomic_notifier_call_chain(&vt_notifier_list, VT_WRITE, ¶m);
273 static void notify_update(struct vc_data *vc)
275 struct vt_notifier_param param = { .vc = vc };
276 atomic_notifier_call_chain(&vt_notifier_list, VT_UPDATE, ¶m);
279 * Low-Level Functions
282 #define IS_FG(vc) ((vc)->vc_num == fg_console)
284 #ifdef VT_BUF_VRAM_ONLY
285 #define DO_UPDATE(vc) 0
287 #define DO_UPDATE(vc) (CON_IS_VISIBLE(vc) && !console_blanked)
290 static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed)
295 p = (unsigned short *)(vc->vc_origin + offset);
296 else if (!vc->vc_sw->con_screen_pos)
297 p = (unsigned short *)(vc->vc_visible_origin + offset);
299 p = vc->vc_sw->con_screen_pos(vc, offset);
303 /* Called from the keyboard irq path.. */
304 static inline void scrolldelta(int lines)
307 /* scrolldelta needs some kind of consistency lock, but the BKL was
308 and still is not protecting versus the scheduled back end */
309 scrollback_delta += lines;
310 schedule_console_callback();
313 void schedule_console_callback(void)
315 schedule_work(&console_work);
318 static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
320 unsigned short *d, *s;
324 if (b > vc->vc_rows || t >= b || nr < 1)
326 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr))
328 d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
329 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr));
330 scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row);
331 scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_video_erase_char,
332 vc->vc_size_row * nr);
335 static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
342 if (b > vc->vc_rows || t >= b || nr < 1)
344 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr))
346 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
347 step = vc->vc_cols * nr;
348 scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row);
349 scr_memsetw(s, vc->vc_video_erase_char, 2 * step);
352 static void do_update_region(struct vc_data *vc, unsigned long start, int count)
354 #ifndef VT_BUF_VRAM_ONLY
355 unsigned int xx, yy, offset;
359 if (!vc->vc_sw->con_getxy) {
360 offset = (start - vc->vc_origin) / 2;
361 xx = offset % vc->vc_cols;
362 yy = offset / vc->vc_cols;
365 start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy);
369 u16 attrib = scr_readw(p) & 0xff00;
372 while (xx < vc->vc_cols && count) {
373 if (attrib != (scr_readw(p) & 0xff00)) {
375 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
378 attrib = scr_readw(p) & 0xff00;
385 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
390 if (vc->vc_sw->con_getxy) {
392 start = vc->vc_sw->con_getxy(vc, start, NULL, NULL);
398 void update_region(struct vc_data *vc, unsigned long start, int count)
400 WARN_CONSOLE_UNLOCKED();
404 do_update_region(vc, start, count);
409 /* Structure of attributes is hardware-dependent */
411 static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink,
412 u8 _underline, u8 _reverse, u8 _italic)
414 if (vc->vc_sw->con_build_attr)
415 return vc->vc_sw->con_build_attr(vc, _color, _intensity,
416 _blink, _underline, _reverse, _italic);
418 #ifndef VT_BUF_VRAM_ONLY
420 * ++roman: I completely changed the attribute format for monochrome
421 * mode (!can_do_color). The formerly used MDA (monochrome display
422 * adapter) format didn't allow the combination of certain effects.
423 * Now the attribute is just a bit vector:
424 * Bit 0..1: intensity (0..2)
431 if (!vc->vc_can_do_color)
434 (_underline ? 4 : 0) |
438 a = (a & 0xF0) | vc->vc_itcolor;
440 a = (a & 0xf0) | vc->vc_ulcolor;
441 else if (_intensity == 0)
442 a = (a & 0xf0) | vc->vc_ulcolor;
444 a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77);
449 if (vc->vc_hi_font_mask == 0x100)
458 static void update_attr(struct vc_data *vc)
460 vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity,
461 vc->vc_blink, vc->vc_underline,
462 vc->vc_reverse ^ vc->vc_decscnm, vc->vc_italic);
463 vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm, 0) << 8) | ' ';
466 /* Note: inverting the screen twice should revert to the original state */
467 void invert_screen(struct vc_data *vc, int offset, int count, int viewed)
471 WARN_CONSOLE_UNLOCKED();
474 p = screenpos(vc, offset, viewed);
475 if (vc->vc_sw->con_invert_region)
476 vc->vc_sw->con_invert_region(vc, p, count);
477 #ifndef VT_BUF_VRAM_ONLY
483 if (!vc->vc_can_do_color) {
490 } else if (vc->vc_hi_font_mask == 0x100) {
493 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4);
500 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4);
508 do_update_region(vc, (unsigned long) p, count);
511 /* used by selection: complement pointer position */
512 void complement_pos(struct vc_data *vc, int offset)
514 static int old_offset = -1;
515 static unsigned short old;
516 static unsigned short oldx, oldy;
518 WARN_CONSOLE_UNLOCKED();
520 if (old_offset != -1 && old_offset >= 0 &&
521 old_offset < vc->vc_screenbuf_size) {
522 scr_writew(old, screenpos(vc, old_offset, 1));
524 vc->vc_sw->con_putc(vc, old, oldy, oldx);
529 if (offset != -1 && offset >= 0 &&
530 offset < vc->vc_screenbuf_size) {
533 p = screenpos(vc, offset, 1);
535 new = old ^ vc->vc_complement_mask;
538 oldx = (offset >> 1) % vc->vc_cols;
539 oldy = (offset >> 1) / vc->vc_cols;
540 vc->vc_sw->con_putc(vc, new, oldy, oldx);
546 static void insert_char(struct vc_data *vc, unsigned int nr)
548 unsigned short *p, *q = (unsigned short *)vc->vc_pos;
550 p = q + vc->vc_cols - nr - vc->vc_x;
552 scr_writew(scr_readw(p), p + nr);
553 scr_memsetw(q, vc->vc_video_erase_char, nr * 2);
554 vc->vc_need_wrap = 0;
556 unsigned short oldattr = vc->vc_attr;
557 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x, vc->vc_y, vc->vc_x + nr, 1,
558 vc->vc_cols - vc->vc_x - nr);
559 vc->vc_attr = vc->vc_video_erase_char >> 8;
561 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y, vc->vc_x + nr);
562 vc->vc_attr = oldattr;
566 static void delete_char(struct vc_data *vc, unsigned int nr)
568 unsigned int i = vc->vc_x;
569 unsigned short *p = (unsigned short *)vc->vc_pos;
571 while (++i <= vc->vc_cols - nr) {
572 scr_writew(scr_readw(p+nr), p);
575 scr_memsetw(p, vc->vc_video_erase_char, nr * 2);
576 vc->vc_need_wrap = 0;
578 unsigned short oldattr = vc->vc_attr;
579 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x + nr, vc->vc_y, vc->vc_x, 1,
580 vc->vc_cols - vc->vc_x - nr);
581 vc->vc_attr = vc->vc_video_erase_char >> 8;
583 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y,
584 vc->vc_cols - 1 - nr);
585 vc->vc_attr = oldattr;
589 static int softcursor_original;
591 static void add_softcursor(struct vc_data *vc)
593 int i = scr_readw((u16 *) vc->vc_pos);
594 u32 type = vc->vc_cursor_type;
596 if (! (type & 0x10)) return;
597 if (softcursor_original != -1) return;
598 softcursor_original = i;
599 i |= ((type >> 8) & 0xff00 );
600 i ^= ((type) & 0xff00 );
601 if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000;
602 if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700;
603 scr_writew(i, (u16 *) vc->vc_pos);
605 vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x);
608 static void hide_softcursor(struct vc_data *vc)
610 if (softcursor_original != -1) {
611 scr_writew(softcursor_original, (u16 *)vc->vc_pos);
613 vc->vc_sw->con_putc(vc, softcursor_original,
615 softcursor_original = -1;
619 static void hide_cursor(struct vc_data *vc)
623 vc->vc_sw->con_cursor(vc, CM_ERASE);
627 static void set_cursor(struct vc_data *vc)
629 if (!IS_FG(vc) || console_blanked ||
630 vc->vc_mode == KD_GRAPHICS)
636 if ((vc->vc_cursor_type & 0x0f) != 1)
637 vc->vc_sw->con_cursor(vc, CM_DRAW);
642 static void set_origin(struct vc_data *vc)
644 WARN_CONSOLE_UNLOCKED();
646 if (!CON_IS_VISIBLE(vc) ||
647 !vc->vc_sw->con_set_origin ||
648 !vc->vc_sw->con_set_origin(vc))
649 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
650 vc->vc_visible_origin = vc->vc_origin;
651 vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size;
652 vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x;
655 static inline void save_screen(struct vc_data *vc)
657 WARN_CONSOLE_UNLOCKED();
659 if (vc->vc_sw->con_save_screen)
660 vc->vc_sw->con_save_screen(vc);
664 * Redrawing of screen
667 static void clear_buffer_attributes(struct vc_data *vc)
669 unsigned short *p = (unsigned short *)vc->vc_origin;
670 int count = vc->vc_screenbuf_size / 2;
671 int mask = vc->vc_hi_font_mask | 0xff;
673 for (; count > 0; count--, p++) {
674 scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p);
678 void redraw_screen(struct vc_data *vc, int is_switch)
682 WARN_CONSOLE_UNLOCKED();
686 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
691 struct vc_data *old_vc = vc_cons[fg_console].d;
694 if (!CON_IS_VISIBLE(vc))
696 *vc->vc_display_fg = vc;
697 fg_console = vc->vc_num;
699 if (!CON_IS_VISIBLE(old_vc)) {
704 sysfs_notify(&tty0dev->kobj, NULL, "active");
706 * If we are switching away from a transparent VT the contents
707 * will be lost, convert it into a blank text console then
708 * it will be repainted blank if we ever switch back.
710 if (old_vc->vc_mode == KD_TRANSPARENT)
711 old_vc->vc_mode = KD_TEXT;
719 int old_was_color = vc->vc_can_do_color;
722 update = vc->vc_sw->con_switch(vc);
725 * If console changed from mono<->color, the best we can do
726 * is to clear the buffer attributes. As it currently stands,
727 * rebuilding new attributes from the old buffer is not doable
728 * without overly complex code.
730 if (old_was_color != vc->vc_can_do_color) {
732 clear_buffer_attributes(vc);
735 /* Forcibly update if we're panicing */
736 if ((update && vc->vc_mode != KD_GRAPHICS) ||
737 vt_force_oops_output(vc))
738 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
743 compute_shiftstate();
749 * Allocation, freeing and resizing of VTs.
752 int vc_cons_allocated(unsigned int i)
754 return (i < MAX_NR_CONSOLES && vc_cons[i].d);
757 static void visual_init(struct vc_data *vc, int num, int init)
759 /* ++Geert: vc->vc_sw->con_init determines console size */
761 module_put(vc->vc_sw->owner);
762 vc->vc_sw = conswitchp;
763 #ifndef VT_SINGLE_DRIVER
764 if (con_driver_map[num])
765 vc->vc_sw = con_driver_map[num];
767 __module_get(vc->vc_sw->owner);
769 vc->vc_display_fg = &master_display_fg;
770 vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir;
771 vc->vc_uni_pagedir = 0;
772 vc->vc_hi_font_mask = 0;
773 vc->vc_complement_mask = 0;
774 vc->vc_can_do_color = 0;
775 vc->vc_panic_force_write = false;
776 vc->vc_sw->con_init(vc, init);
777 if (!vc->vc_complement_mask)
778 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
779 vc->vc_s_complement_mask = vc->vc_complement_mask;
780 vc->vc_size_row = vc->vc_cols << 1;
781 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
784 int vc_allocate(unsigned int currcons) /* return 0 on success */
786 WARN_CONSOLE_UNLOCKED();
788 if (currcons >= MAX_NR_CONSOLES)
790 if (!vc_cons[currcons].d) {
792 struct vt_notifier_param param;
794 /* prevent users from taking too much memory */
795 if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE))
798 /* due to the granularity of kmalloc, we waste some memory here */
799 /* the alloc is done in two steps, to optimize the common situation
800 of a 25x80 console (structsize=216, screenbuf_size=4000) */
801 /* although the numbers above are not valid since long ago, the
802 point is still up-to-date and the comment still has its value
803 even if only as a historical artifact. --mj, July 1998 */
804 param.vc = vc = kzalloc(sizeof(struct vc_data), GFP_KERNEL);
807 vc_cons[currcons].d = vc;
808 tty_port_init(&vc->port);
809 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
810 visual_init(vc, currcons, 1);
811 if (!*vc->vc_uni_pagedir_loc)
812 con_set_default_unimap(vc);
813 vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL);
814 if (!vc->vc_screenbuf) {
816 vc_cons[currcons].d = NULL;
820 /* If no drivers have overridden us and the user didn't pass a
821 boot option, default to displaying the cursor */
822 if (global_cursor_default == -1)
823 global_cursor_default = 1;
825 vc_init(vc, vc->vc_rows, vc->vc_cols, 1, KD_TEXT);
826 vcs_make_sysfs(currcons);
827 atomic_notifier_call_chain(&vt_notifier_list, VT_ALLOCATE, ¶m);
832 static inline int resize_screen(struct vc_data *vc, int width, int height,
835 /* Resizes the resolution of the display adapater */
838 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize)
839 err = vc->vc_sw->con_resize(vc, width, height, user);
845 * Change # of rows and columns (0 means unchanged/the size of fg_console)
846 * [this is to be used together with some user program
847 * like resize that changes the hardware videomode]
849 #define VC_RESIZE_MAXCOL (32767)
850 #define VC_RESIZE_MAXROW (32767)
853 * vc_do_resize - resizing method for the tty
854 * @tty: tty being resized
855 * @real_tty: real tty (different to tty if a pty/tty pair)
856 * @vc: virtual console private data
860 * Resize a virtual console, clipping according to the actual constraints.
861 * If the caller passes a tty structure then update the termios winsize
862 * information and perform any necessary signal handling.
864 * Caller must hold the console semaphore. Takes the termios mutex and
865 * ctrl_lock of the tty IFF a tty is passed.
868 static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc,
869 unsigned int cols, unsigned int lines)
871 unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0;
873 unsigned int old_cols, old_rows, old_row_size, old_screen_size;
874 unsigned int new_cols, new_rows, new_row_size, new_screen_size;
876 unsigned short *newscreen;
878 WARN_CONSOLE_UNLOCKED();
883 user = vc->vc_resize_user;
884 vc->vc_resize_user = 0;
886 if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW)
889 new_cols = (cols ? cols : vc->vc_cols);
890 new_rows = (lines ? lines : vc->vc_rows);
891 new_row_size = new_cols << 1;
892 new_screen_size = new_row_size * new_rows;
894 if (new_cols == vc->vc_cols && new_rows == vc->vc_rows)
897 newscreen = kmalloc(new_screen_size, GFP_USER);
901 old_rows = vc->vc_rows;
902 old_cols = vc->vc_cols;
903 old_row_size = vc->vc_size_row;
904 old_screen_size = vc->vc_screenbuf_size;
906 err = resize_screen(vc, new_cols, new_rows, user);
912 vc->vc_rows = new_rows;
913 vc->vc_cols = new_cols;
914 vc->vc_size_row = new_row_size;
915 vc->vc_screenbuf_size = new_screen_size;
917 rlth = min(old_row_size, new_row_size);
918 rrem = new_row_size - rlth;
919 old_origin = vc->vc_origin;
920 new_origin = (long) newscreen;
921 new_scr_end = new_origin + new_screen_size;
923 if (vc->vc_y > new_rows) {
924 if (old_rows - vc->vc_y < new_rows) {
926 * Cursor near the bottom, copy contents from the
929 old_origin += (old_rows - new_rows) * old_row_size;
932 * Cursor is in no man's land, copy 1/2 screenful
933 * from the top and bottom of cursor position
935 old_origin += (vc->vc_y - new_rows/2) * old_row_size;
939 end = old_origin + old_row_size * min(old_rows, new_rows);
943 while (old_origin < end) {
944 scr_memcpyw((unsigned short *) new_origin,
945 (unsigned short *) old_origin, rlth);
947 scr_memsetw((void *)(new_origin + rlth),
948 vc->vc_video_erase_char, rrem);
949 old_origin += old_row_size;
950 new_origin += new_row_size;
952 if (new_scr_end > new_origin)
953 scr_memsetw((void *)new_origin, vc->vc_video_erase_char,
954 new_scr_end - new_origin);
955 kfree(vc->vc_screenbuf);
956 vc->vc_screenbuf = newscreen;
957 vc->vc_screenbuf_size = new_screen_size;
960 /* do part of a reset_terminal() */
962 vc->vc_bottom = vc->vc_rows;
963 gotoxy(vc, vc->vc_x, vc->vc_y);
967 /* Rewrite the requested winsize data with the actual
970 memset(&ws, 0, sizeof(ws));
971 ws.ws_row = vc->vc_rows;
972 ws.ws_col = vc->vc_cols;
973 ws.ws_ypixel = vc->vc_scan_lines;
974 tty_do_resize(tty, &ws);
977 if (CON_IS_VISIBLE(vc))
979 vt_event_post(VT_EVENT_RESIZE, vc->vc_num, vc->vc_num);
984 * vc_resize - resize a VT
985 * @vc: virtual console
989 * Resize a virtual console as seen from the console end of things. We
990 * use the common vc_do_resize methods to update the structures. The
991 * caller must hold the console sem to protect console internals and
995 int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int rows)
997 return vc_do_resize(vc->port.tty, vc, cols, rows);
1001 * vt_resize - resize a VT
1002 * @tty: tty to resize
1003 * @ws: winsize attributes
1005 * Resize a virtual terminal. This is called by the tty layer as we
1006 * register our own handler for resizing. The mutual helper does all
1009 * Takes the console sem and the called methods then take the tty
1010 * termios_mutex and the tty ctrl_lock in that order.
1012 static int vt_resize(struct tty_struct *tty, struct winsize *ws)
1014 struct vc_data *vc = tty->driver_data;
1018 ret = vc_do_resize(tty, vc, ws->ws_col, ws->ws_row);
1023 void vc_deallocate(unsigned int currcons)
1025 WARN_CONSOLE_UNLOCKED();
1027 if (vc_cons_allocated(currcons)) {
1028 struct vc_data *vc = vc_cons[currcons].d;
1029 struct vt_notifier_param param = { .vc = vc };
1031 atomic_notifier_call_chain(&vt_notifier_list, VT_DEALLOCATE, ¶m);
1032 vcs_remove_sysfs(currcons);
1033 vc->vc_sw->con_deinit(vc);
1034 put_pid(vc->vt_pid);
1035 module_put(vc->vc_sw->owner);
1036 kfree(vc->vc_screenbuf);
1037 if (currcons >= MIN_NR_CONSOLES)
1039 vc_cons[currcons].d = NULL;
1047 #define set_kbd(vc, x) set_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1048 #define clr_kbd(vc, x) clr_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1049 #define is_kbd(vc, x) vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1051 #define decarm VC_REPEAT
1052 #define decckm VC_CKMODE
1053 #define kbdapplic VC_APPLIC
1057 * this is what the terminal answers to a ESC-Z or csi0c query.
1059 #define VT100ID "\033[?1;2c"
1060 #define VT102ID "\033[?6c"
1062 unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7,
1063 8,12,10,14, 9,13,11,15 };
1065 /* the default colour table, for VGA+ colour systems */
1066 int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
1067 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
1068 int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
1069 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
1070 int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
1071 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
1073 module_param_array(default_red, int, NULL, S_IRUGO | S_IWUSR);
1074 module_param_array(default_grn, int, NULL, S_IRUGO | S_IWUSR);
1075 module_param_array(default_blu, int, NULL, S_IRUGO | S_IWUSR);
1078 * gotoxy() must verify all boundaries, because the arguments
1079 * might also be negative. If the given position is out of
1080 * bounds, the cursor is placed at the nearest margin.
1082 static void gotoxy(struct vc_data *vc, int new_x, int new_y)
1089 if (new_x >= vc->vc_cols)
1090 vc->vc_x = vc->vc_cols - 1;
1097 max_y = vc->vc_bottom;
1100 max_y = vc->vc_rows;
1104 else if (new_y >= max_y)
1105 vc->vc_y = max_y - 1;
1108 vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1);
1109 vc->vc_need_wrap = 0;
1112 /* for absolute user moves, when decom is set */
1113 static void gotoxay(struct vc_data *vc, int new_x, int new_y)
1115 gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y);
1118 void scrollback(struct vc_data *vc, int lines)
1121 lines = vc->vc_rows / 2;
1122 scrolldelta(-lines);
1125 void scrollfront(struct vc_data *vc, int lines)
1128 lines = vc->vc_rows / 2;
1132 static void lf(struct vc_data *vc)
1134 /* don't scroll if above bottom of scrolling region, or
1135 * if below scrolling region
1137 if (vc->vc_y + 1 == vc->vc_bottom)
1138 scrup(vc, vc->vc_top, vc->vc_bottom, 1);
1139 else if (vc->vc_y < vc->vc_rows - 1) {
1141 vc->vc_pos += vc->vc_size_row;
1143 vc->vc_need_wrap = 0;
1144 notify_write(vc, '\n');
1147 static void ri(struct vc_data *vc)
1149 /* don't scroll if below top of scrolling region, or
1150 * if above scrolling region
1152 if (vc->vc_y == vc->vc_top)
1153 scrdown(vc, vc->vc_top, vc->vc_bottom, 1);
1154 else if (vc->vc_y > 0) {
1156 vc->vc_pos -= vc->vc_size_row;
1158 vc->vc_need_wrap = 0;
1161 static inline void cr(struct vc_data *vc)
1163 vc->vc_pos -= vc->vc_x << 1;
1164 vc->vc_need_wrap = vc->vc_x = 0;
1165 notify_write(vc, '\r');
1168 static inline void bs(struct vc_data *vc)
1173 vc->vc_need_wrap = 0;
1174 notify_write(vc, '\b');
1178 static inline void del(struct vc_data *vc)
1183 static void csi_J(struct vc_data *vc, int vpar)
1186 unsigned short * start;
1189 case 0: /* erase from cursor to end of display */
1190 count = (vc->vc_scr_end - vc->vc_pos) >> 1;
1191 start = (unsigned short *)vc->vc_pos;
1192 if (DO_UPDATE(vc)) {
1193 /* do in two stages */
1194 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1195 vc->vc_cols - vc->vc_x);
1196 vc->vc_sw->con_clear(vc, vc->vc_y + 1, 0,
1197 vc->vc_rows - vc->vc_y - 1,
1201 case 1: /* erase from start to cursor */
1202 count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1;
1203 start = (unsigned short *)vc->vc_origin;
1204 if (DO_UPDATE(vc)) {
1205 /* do in two stages */
1206 vc->vc_sw->con_clear(vc, 0, 0, vc->vc_y,
1208 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1212 case 2: /* erase whole display */
1213 count = vc->vc_cols * vc->vc_rows;
1214 start = (unsigned short *)vc->vc_origin;
1216 vc->vc_sw->con_clear(vc, 0, 0,
1223 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1224 vc->vc_need_wrap = 0;
1227 static void csi_K(struct vc_data *vc, int vpar)
1230 unsigned short * start;
1233 case 0: /* erase from cursor to end of line */
1234 count = vc->vc_cols - vc->vc_x;
1235 start = (unsigned short *)vc->vc_pos;
1237 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1238 vc->vc_cols - vc->vc_x);
1240 case 1: /* erase from start of line to cursor */
1241 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1242 count = vc->vc_x + 1;
1244 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1247 case 2: /* erase whole line */
1248 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1249 count = vc->vc_cols;
1251 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1257 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1258 vc->vc_need_wrap = 0;
1261 static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */
1267 count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar;
1269 scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count);
1271 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count);
1272 vc->vc_need_wrap = 0;
1275 static void default_attr(struct vc_data *vc)
1277 vc->vc_intensity = 1;
1279 vc->vc_underline = 0;
1282 vc->vc_color = vc->vc_def_color;
1285 /* console_lock is held */
1286 static void csi_m(struct vc_data *vc)
1290 for (i = 0; i <= vc->vc_npar; i++)
1291 switch (vc->vc_par[i]) {
1292 case 0: /* all attributes off */
1296 vc->vc_intensity = 2;
1299 vc->vc_intensity = 0;
1305 vc->vc_underline = 1;
1313 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1314 * Select primary font, don't display
1315 * control chars if defined, don't set
1318 vc->vc_translate = set_translate(vc->vc_charset == 0
1320 : vc->vc_G1_charset, vc);
1321 vc->vc_disp_ctrl = 0;
1322 vc->vc_toggle_meta = 0;
1324 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1325 * Select first alternate font, lets
1326 * chars < 32 be displayed as ROM chars.
1328 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1329 vc->vc_disp_ctrl = 1;
1330 vc->vc_toggle_meta = 0;
1332 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1333 * Select second alternate font, toggle
1334 * high bit before displaying as ROM char.
1336 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1337 vc->vc_disp_ctrl = 1;
1338 vc->vc_toggle_meta = 1;
1342 vc->vc_intensity = 1;
1348 vc->vc_underline = 0;
1356 case 38: /* ANSI X3.64-1979 (SCO-ish?)
1357 * Enables underscore, white foreground
1358 * with white underscore (Linux - use
1359 * default foreground).
1361 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1362 vc->vc_underline = 1;
1364 case 39: /* ANSI X3.64-1979 (SCO-ish?)
1365 * Disable underline option.
1366 * Reset colour to default? It did this
1369 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1370 vc->vc_underline = 0;
1373 vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f);
1376 if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37)
1377 vc->vc_color = color_table[vc->vc_par[i] - 30]
1378 | (vc->vc_color & 0xf0);
1379 else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47)
1380 vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4)
1381 | (vc->vc_color & 0x0f);
1387 static void respond_string(const char *p, struct tty_struct *tty)
1390 tty_insert_flip_char(tty, *p, 0);
1393 con_schedule_flip(tty);
1396 static void cursor_report(struct vc_data *vc, struct tty_struct *tty)
1400 sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1);
1401 respond_string(buf, tty);
1404 static inline void status_report(struct tty_struct *tty)
1406 respond_string("\033[0n", tty); /* Terminal ok */
1409 static inline void respond_ID(struct tty_struct * tty)
1411 respond_string(VT102ID, tty);
1414 void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry)
1418 sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx),
1420 respond_string(buf, tty);
1423 /* invoked via ioctl(TIOCLINUX) and through set_selection */
1424 int mouse_reporting(void)
1426 return vc_cons[fg_console].d->vc_report_mouse;
1429 /* console_lock is held */
1430 static void set_mode(struct vc_data *vc, int on_off)
1434 for (i = 0; i <= vc->vc_npar; i++)
1436 switch(vc->vc_par[i]) { /* DEC private modes set/reset */
1437 case 1: /* Cursor keys send ^[Ox/^[[x */
1439 set_kbd(vc, decckm);
1441 clr_kbd(vc, decckm);
1443 case 3: /* 80/132 mode switch unimplemented */
1444 vc->vc_deccolm = on_off;
1446 vc_resize(deccolm ? 132 : 80, vc->vc_rows);
1447 /* this alone does not suffice; some user mode
1448 utility has to change the hardware regs */
1451 case 5: /* Inverted screen on/off */
1452 if (vc->vc_decscnm != on_off) {
1453 vc->vc_decscnm = on_off;
1454 invert_screen(vc, 0, vc->vc_screenbuf_size, 0);
1458 case 6: /* Origin relative/absolute */
1459 vc->vc_decom = on_off;
1462 case 7: /* Autowrap on/off */
1463 vc->vc_decawm = on_off;
1465 case 8: /* Autorepeat on/off */
1467 set_kbd(vc, decarm);
1469 clr_kbd(vc, decarm);
1472 vc->vc_report_mouse = on_off ? 1 : 0;
1474 case 25: /* Cursor on/off */
1475 vc->vc_deccm = on_off;
1478 vc->vc_report_mouse = on_off ? 2 : 0;
1482 switch(vc->vc_par[i]) { /* ANSI modes set/reset */
1483 case 3: /* Monitor (display ctrls) */
1484 vc->vc_disp_ctrl = on_off;
1486 case 4: /* Insert Mode on/off */
1487 vc->vc_decim = on_off;
1489 case 20: /* Lf, Enter == CrLf/Lf */
1499 /* console_lock is held */
1500 static void setterm_command(struct vc_data *vc)
1502 switch(vc->vc_par[0]) {
1503 case 1: /* set color for underline mode */
1504 if (vc->vc_can_do_color &&
1505 vc->vc_par[1] < 16) {
1506 vc->vc_ulcolor = color_table[vc->vc_par[1]];
1507 if (vc->vc_underline)
1511 case 2: /* set color for half intensity mode */
1512 if (vc->vc_can_do_color &&
1513 vc->vc_par[1] < 16) {
1514 vc->vc_halfcolor = color_table[vc->vc_par[1]];
1515 if (vc->vc_intensity == 0)
1519 case 8: /* store colors as defaults */
1520 vc->vc_def_color = vc->vc_attr;
1521 if (vc->vc_hi_font_mask == 0x100)
1522 vc->vc_def_color >>= 1;
1526 case 9: /* set blanking interval */
1527 blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60;
1528 poke_blanked_console();
1530 case 10: /* set bell frequency in Hz */
1531 if (vc->vc_npar >= 1)
1532 vc->vc_bell_pitch = vc->vc_par[1];
1534 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1536 case 11: /* set bell duration in msec */
1537 if (vc->vc_npar >= 1)
1538 vc->vc_bell_duration = (vc->vc_par[1] < 2000) ?
1539 vc->vc_par[1] * HZ / 1000 : 0;
1541 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1543 case 12: /* bring specified console to the front */
1544 if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1))
1545 set_console(vc->vc_par[1] - 1);
1547 case 13: /* unblank the screen */
1548 poke_blanked_console();
1550 case 14: /* set vesa powerdown interval */
1551 vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1553 case 15: /* activate the previous console */
1554 set_console(last_console);
1559 /* console_lock is held */
1560 static void csi_at(struct vc_data *vc, unsigned int nr)
1562 if (nr > vc->vc_cols - vc->vc_x)
1563 nr = vc->vc_cols - vc->vc_x;
1566 insert_char(vc, nr);
1569 /* console_lock is held */
1570 static void csi_L(struct vc_data *vc, unsigned int nr)
1572 if (nr > vc->vc_rows - vc->vc_y)
1573 nr = vc->vc_rows - vc->vc_y;
1576 scrdown(vc, vc->vc_y, vc->vc_bottom, nr);
1577 vc->vc_need_wrap = 0;
1580 /* console_lock is held */
1581 static void csi_P(struct vc_data *vc, unsigned int nr)
1583 if (nr > vc->vc_cols - vc->vc_x)
1584 nr = vc->vc_cols - vc->vc_x;
1587 delete_char(vc, nr);
1590 /* console_lock is held */
1591 static void csi_M(struct vc_data *vc, unsigned int nr)
1593 if (nr > vc->vc_rows - vc->vc_y)
1594 nr = vc->vc_rows - vc->vc_y;
1597 scrup(vc, vc->vc_y, vc->vc_bottom, nr);
1598 vc->vc_need_wrap = 0;
1601 /* console_lock is held (except via vc_init->reset_terminal */
1602 static void save_cur(struct vc_data *vc)
1604 vc->vc_saved_x = vc->vc_x;
1605 vc->vc_saved_y = vc->vc_y;
1606 vc->vc_s_intensity = vc->vc_intensity;
1607 vc->vc_s_italic = vc->vc_italic;
1608 vc->vc_s_underline = vc->vc_underline;
1609 vc->vc_s_blink = vc->vc_blink;
1610 vc->vc_s_reverse = vc->vc_reverse;
1611 vc->vc_s_charset = vc->vc_charset;
1612 vc->vc_s_color = vc->vc_color;
1613 vc->vc_saved_G0 = vc->vc_G0_charset;
1614 vc->vc_saved_G1 = vc->vc_G1_charset;
1617 /* console_lock is held */
1618 static void restore_cur(struct vc_data *vc)
1620 gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y);
1621 vc->vc_intensity = vc->vc_s_intensity;
1622 vc->vc_italic = vc->vc_s_italic;
1623 vc->vc_underline = vc->vc_s_underline;
1624 vc->vc_blink = vc->vc_s_blink;
1625 vc->vc_reverse = vc->vc_s_reverse;
1626 vc->vc_charset = vc->vc_s_charset;
1627 vc->vc_color = vc->vc_s_color;
1628 vc->vc_G0_charset = vc->vc_saved_G0;
1629 vc->vc_G1_charset = vc->vc_saved_G1;
1630 vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc);
1632 vc->vc_need_wrap = 0;
1635 enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey,
1636 EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd,
1639 /* console_lock is held (except via vc_init()) */
1640 static void reset_terminal(struct vc_data *vc, int do_clear)
1643 vc->vc_bottom = vc->vc_rows;
1644 vc->vc_state = ESnormal;
1646 vc->vc_translate = set_translate(LAT1_MAP, vc);
1647 vc->vc_G0_charset = LAT1_MAP;
1648 vc->vc_G1_charset = GRAF_MAP;
1650 vc->vc_need_wrap = 0;
1651 vc->vc_report_mouse = 0;
1652 vc->vc_utf = default_utf8;
1653 vc->vc_utf_count = 0;
1655 vc->vc_disp_ctrl = 0;
1656 vc->vc_toggle_meta = 0;
1661 vc->vc_deccm = global_cursor_default;
1664 set_kbd(vc, decarm);
1665 clr_kbd(vc, decckm);
1666 clr_kbd(vc, kbdapplic);
1668 kbd_table[vc->vc_num].lockstate = 0;
1669 kbd_table[vc->vc_num].slockstate = 0;
1670 kbd_table[vc->vc_num].ledmode = LED_SHOW_FLAGS;
1671 kbd_table[vc->vc_num].ledflagstate = kbd_table[vc->vc_num].default_ledflagstate;
1672 /* do not do set_leds here because this causes an endless tasklet loop
1673 when the keyboard hasn't been initialized yet */
1675 vc->vc_cursor_type = cur_default;
1676 vc->vc_complement_mask = vc->vc_s_complement_mask;
1681 vc->vc_tab_stop[0] = 0x01010100;
1682 vc->vc_tab_stop[1] =
1683 vc->vc_tab_stop[2] =
1684 vc->vc_tab_stop[3] =
1685 vc->vc_tab_stop[4] =
1686 vc->vc_tab_stop[5] =
1687 vc->vc_tab_stop[6] =
1688 vc->vc_tab_stop[7] = 0x01010101;
1690 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1691 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1699 /* console_lock is held */
1700 static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
1703 * Control characters can be used in the _middle_
1704 * of an escape sequence.
1710 if (vc->vc_bell_duration)
1711 kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration);
1717 vc->vc_pos -= (vc->vc_x << 1);
1718 while (vc->vc_x < vc->vc_cols - 1) {
1720 if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31)))
1723 vc->vc_pos += (vc->vc_x << 1);
1724 notify_write(vc, '\t');
1726 case 10: case 11: case 12:
1728 if (!is_kbd(vc, lnm))
1735 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1736 vc->vc_disp_ctrl = 1;
1740 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1741 vc->vc_disp_ctrl = 0;
1744 vc->vc_state = ESnormal;
1747 vc->vc_state = ESesc;
1753 vc->vc_state = ESsquare;
1756 switch(vc->vc_state) {
1758 vc->vc_state = ESnormal;
1761 vc->vc_state = ESsquare;
1764 vc->vc_state = ESnonstd;
1767 vc->vc_state = ESpercent;
1780 vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31));
1792 vc->vc_state = ESsetG0;
1795 vc->vc_state = ESsetG1;
1798 vc->vc_state = EShash;
1801 reset_terminal(vc, 1);
1803 case '>': /* Numeric keypad */
1804 clr_kbd(vc, kbdapplic);
1806 case '=': /* Appl. keypad */
1807 set_kbd(vc, kbdapplic);
1812 if (c=='P') { /* palette escape sequence */
1813 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1814 vc->vc_par[vc->vc_npar] = 0;
1816 vc->vc_state = ESpalette;
1818 } else if (c=='R') { /* reset palette */
1820 vc->vc_state = ESnormal;
1822 vc->vc_state = ESnormal;
1826 vc->vc_par[vc->vc_npar++] = hex_to_bin(c);
1827 if (vc->vc_npar == 7) {
1828 int i = vc->vc_par[0] * 3, j = 1;
1829 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1830 vc->vc_palette[i++] += vc->vc_par[j++];
1831 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1832 vc->vc_palette[i++] += vc->vc_par[j++];
1833 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1834 vc->vc_palette[i] += vc->vc_par[j];
1836 vc->vc_state = ESnormal;
1839 vc->vc_state = ESnormal;
1842 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1843 vc->vc_par[vc->vc_npar] = 0;
1845 vc->vc_state = ESgetpars;
1846 if (c == '[') { /* Function key */
1847 vc->vc_state=ESfunckey;
1850 vc->vc_ques = (c == '?');
1854 if (c == ';' && vc->vc_npar < NPAR - 1) {
1857 } else if (c>='0' && c<='9') {
1858 vc->vc_par[vc->vc_npar] *= 10;
1859 vc->vc_par[vc->vc_npar] += c - '0';
1862 vc->vc_state = ESgotpars;
1864 vc->vc_state = ESnormal;
1875 vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16);
1877 vc->vc_cursor_type = cur_default;
1885 vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1];
1887 vc->vc_complement_mask = vc->vc_s_complement_mask;
1893 if (vc->vc_par[0] == 5)
1895 else if (vc->vc_par[0] == 6)
1896 cursor_report(vc, tty);
1908 gotoxy(vc, vc->vc_par[0], vc->vc_y);
1913 gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]);
1918 gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]);
1923 gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y);
1928 gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y);
1933 gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]);
1938 gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]);
1943 gotoxay(vc, vc->vc_x ,vc->vc_par[0]);
1950 gotoxay(vc, vc->vc_par[1], vc->vc_par[0]);
1953 csi_J(vc, vc->vc_par[0]);
1956 csi_K(vc, vc->vc_par[0]);
1959 csi_L(vc, vc->vc_par[0]);
1962 csi_M(vc, vc->vc_par[0]);
1965 csi_P(vc, vc->vc_par[0]);
1973 vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31));
1974 else if (vc->vc_par[0] == 3) {
1975 vc->vc_tab_stop[0] =
1976 vc->vc_tab_stop[1] =
1977 vc->vc_tab_stop[2] =
1978 vc->vc_tab_stop[3] =
1979 vc->vc_tab_stop[4] =
1980 vc->vc_tab_stop[5] =
1981 vc->vc_tab_stop[6] =
1982 vc->vc_tab_stop[7] = 0;
1988 case 'q': /* DECLL - but only 3 leds */
1989 /* map 0,1,2,3 to 0,1,2,4 */
1990 if (vc->vc_par[0] < 4)
1991 setledstate(kbd_table + vc->vc_num,
1992 (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4);
1998 vc->vc_par[1] = vc->vc_rows;
1999 /* Minimum allowed region is 2 lines */
2000 if (vc->vc_par[0] < vc->vc_par[1] &&
2001 vc->vc_par[1] <= vc->vc_rows) {
2002 vc->vc_top = vc->vc_par[0] - 1;
2003 vc->vc_bottom = vc->vc_par[1];
2014 csi_X(vc, vc->vc_par[0]);
2017 csi_at(vc, vc->vc_par[0]);
2019 case ']': /* setterm functions */
2020 setterm_command(vc);
2025 vc->vc_state = ESnormal;
2027 case '@': /* defined in ISO 2022 */
2030 case 'G': /* prelim official escape code */
2031 case '8': /* retained for compatibility */
2037 vc->vc_state = ESnormal;
2040 vc->vc_state = ESnormal;
2042 /* DEC screen alignment test. kludge :-) */
2043 vc->vc_video_erase_char =
2044 (vc->vc_video_erase_char & 0xff00) | 'E';
2046 vc->vc_video_erase_char =
2047 (vc->vc_video_erase_char & 0xff00) | ' ';
2048 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
2053 vc->vc_G0_charset = GRAF_MAP;
2055 vc->vc_G0_charset = LAT1_MAP;
2057 vc->vc_G0_charset = IBMPC_MAP;
2059 vc->vc_G0_charset = USER_MAP;
2060 if (vc->vc_charset == 0)
2061 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
2062 vc->vc_state = ESnormal;
2066 vc->vc_G1_charset = GRAF_MAP;
2068 vc->vc_G1_charset = LAT1_MAP;
2070 vc->vc_G1_charset = IBMPC_MAP;
2072 vc->vc_G1_charset = USER_MAP;
2073 if (vc->vc_charset == 1)
2074 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
2075 vc->vc_state = ESnormal;
2078 vc->vc_state = ESnormal;
2082 /* This is a temporary buffer used to prepare a tty console write
2083 * so that we can easily avoid touching user space while holding the
2084 * console spinlock. It is allocated in con_init and is shared by
2085 * this code and the vc_screen read/write tty calls.
2087 * We have to allocate this statically in the kernel data section
2088 * since console_init (and thus con_init) are called before any
2089 * kernel memory allocation is available.
2091 char con_buf[CON_BUF_SIZE];
2092 DEFINE_MUTEX(con_buf_mtx);
2094 /* is_double_width() is based on the wcwidth() implementation by
2095 * Markus Kuhn -- 2007-05-26 (Unicode 5.0)
2096 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
2103 static int bisearch(uint32_t ucs, const struct interval *table, int max)
2108 if (ucs < table[0].first || ucs > table[max].last)
2110 while (max >= min) {
2111 mid = (min + max) / 2;
2112 if (ucs > table[mid].last)
2114 else if (ucs < table[mid].first)
2122 static int is_double_width(uint32_t ucs)
2124 static const struct interval double_width[] = {
2125 { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E },
2126 { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF },
2127 { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 },
2128 { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD }
2130 return bisearch(ucs, double_width, ARRAY_SIZE(double_width) - 1);
2133 /* acquires console_lock */
2134 static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2136 #ifdef VT_BUF_VRAM_ONLY
2137 #define FLUSH do { } while(0);
2139 #define FLUSH if (draw_x >= 0) { \
2140 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
2145 int c, tc, ok, n = 0, draw_x = -1;
2146 unsigned int currcons;
2147 unsigned long draw_from = 0, draw_to = 0;
2149 unsigned char vc_attr;
2150 struct vt_notifier_param param;
2154 u16 himask, charmask;
2162 vc = tty->driver_data;
2164 printk(KERN_ERR "vt: argh, driver_data is NULL !\n");
2169 currcons = vc->vc_num;
2170 if (!vc_cons_allocated(currcons)) {
2171 /* could this happen? */
2172 printk_once("con_write: tty %d not allocated\n", currcons+1);
2177 himask = vc->vc_hi_font_mask;
2178 charmask = himask ? 0x1ff : 0xff;
2180 /* undraw cursor first */
2186 while (!tty->stopped && count) {
2196 /* Do no translation at all in control states */
2197 if (vc->vc_state != ESnormal) {
2199 } else if (vc->vc_utf && !vc->vc_disp_ctrl) {
2200 /* Combine UTF-8 into Unicode in vc_utf_char.
2201 * vc_utf_count is the number of continuation bytes still
2202 * expected to arrive.
2203 * vc_npar is the number of continuation bytes arrived so
2207 if ((c & 0xc0) == 0x80) {
2208 /* Continuation byte received */
2209 static const uint32_t utf8_length_changes[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff };
2210 if (vc->vc_utf_count) {
2211 vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f);
2213 if (--vc->vc_utf_count) {
2214 /* Still need some bytes */
2217 /* Got a whole character */
2218 c = vc->vc_utf_char;
2219 /* Reject overlong sequences */
2220 if (c <= utf8_length_changes[vc->vc_npar - 1] ||
2221 c > utf8_length_changes[vc->vc_npar])
2224 /* Unexpected continuation byte */
2225 vc->vc_utf_count = 0;
2229 /* Single ASCII byte or first byte of a sequence received */
2230 if (vc->vc_utf_count) {
2231 /* Continuation byte expected */
2233 vc->vc_utf_count = 0;
2235 } else if (c > 0x7f) {
2236 /* First byte of a multibyte sequence received */
2238 if ((c & 0xe0) == 0xc0) {
2239 vc->vc_utf_count = 1;
2240 vc->vc_utf_char = (c & 0x1f);
2241 } else if ((c & 0xf0) == 0xe0) {
2242 vc->vc_utf_count = 2;
2243 vc->vc_utf_char = (c & 0x0f);
2244 } else if ((c & 0xf8) == 0xf0) {
2245 vc->vc_utf_count = 3;
2246 vc->vc_utf_char = (c & 0x07);
2247 } else if ((c & 0xfc) == 0xf8) {
2248 vc->vc_utf_count = 4;
2249 vc->vc_utf_char = (c & 0x03);
2250 } else if ((c & 0xfe) == 0xfc) {
2251 vc->vc_utf_count = 5;
2252 vc->vc_utf_char = (c & 0x01);
2254 /* 254 and 255 are invalid */
2257 if (vc->vc_utf_count) {
2258 /* Still need some bytes */
2262 /* Nothing to do if an ASCII byte was received */
2264 /* End of UTF-8 decoding. */
2265 /* c is the received character, or U+FFFD for invalid sequences. */
2266 /* Replace invalid Unicode code points with U+FFFD too */
2267 if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff)
2270 } else { /* no utf or alternate charset mode */
2271 tc = vc_translate(vc, c);
2275 if (atomic_notifier_call_chain(&vt_notifier_list, VT_PREWRITE,
2276 ¶m) == NOTIFY_STOP)
2279 /* If the original code was a control character we
2280 * only allow a glyph to be displayed if the code is
2281 * not normally used (such as for cursor movement) or
2282 * if the disp_ctrl mode has been explicitly enabled.
2283 * Certain characters (as given by the CTRL_ALWAYS
2284 * bitmap) are always displayed as control characters,
2285 * as the console would be pretty useless without
2286 * them; to display an arbitrary font position use the
2287 * direct-to-font zone in UTF-8 mode.
2289 ok = tc && (c >= 32 ||
2290 !(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 :
2291 vc->vc_utf || ((CTRL_ACTION >> c) & 1)))
2292 && (c != 127 || vc->vc_disp_ctrl)
2295 if (vc->vc_state == ESnormal && ok) {
2296 if (vc->vc_utf && !vc->vc_disp_ctrl) {
2297 if (is_double_width(c))
2300 /* Now try to find out how to display it */
2301 tc = conv_uni_to_pc(vc, tc);
2302 if (tc & ~charmask) {
2303 if (tc == -1 || tc == -2) {
2304 continue; /* nothing to display */
2306 /* Glyph not found */
2307 if ((!(vc->vc_utf && !vc->vc_disp_ctrl) || c < 128) && !(c & ~charmask)) {
2308 /* In legacy mode use the glyph we get by a 1:1 mapping.
2309 This would make absolutely no sense with Unicode in mind,
2310 but do this for ASCII characters since a font may lack
2311 Unicode mapping info and we don't want to end up with
2312 having question marks only. */
2315 /* Display U+FFFD. If it's not found, display an inverse question mark. */
2316 tc = conv_uni_to_pc(vc, 0xfffd);
2319 tc = conv_uni_to_pc(vc, '?');
2320 if (tc < 0) tc = '?';
2326 vc_attr = vc->vc_attr;
2328 /* invert vc_attr */
2329 if (!vc->vc_can_do_color) {
2330 vc_attr = (vc->vc_attr) ^ 0x08;
2331 } else if (vc->vc_hi_font_mask == 0x100) {
2332 vc_attr = ((vc->vc_attr) & 0x11) | (((vc->vc_attr) & 0xe0) >> 4) | (((vc->vc_attr) & 0x0e) << 4);
2334 vc_attr = ((vc->vc_attr) & 0x88) | (((vc->vc_attr) & 0x70) >> 4) | (((vc->vc_attr) & 0x07) << 4);
2340 if (vc->vc_need_wrap || vc->vc_decim)
2342 if (vc->vc_need_wrap) {
2349 ((vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) :
2350 (vc_attr << 8) + tc,
2351 (u16 *) vc->vc_pos);
2352 if (DO_UPDATE(vc) && draw_x < 0) {
2354 draw_from = vc->vc_pos;
2356 if (vc->vc_x == vc->vc_cols - 1) {
2357 vc->vc_need_wrap = vc->vc_decawm;
2358 draw_to = vc->vc_pos + 2;
2361 draw_to = (vc->vc_pos += 2);
2364 if (!--width) break;
2366 tc = conv_uni_to_pc(vc, ' '); /* A space is printed in the second column */
2367 if (tc < 0) tc = ' ';
2369 notify_write(vc, c);
2380 goto rescan_last_byte;
2385 do_con_trol(tty, vc, orig);
2388 console_conditional_schedule();
2396 * This is the console switching callback.
2398 * Doing console switching in a process context allows
2399 * us to do the switches asynchronously (needed when we want
2400 * to switch due to a keyboard interrupt). Synchronization
2401 * with other console code and prevention of re-entrancy is
2402 * ensured with console_lock.
2404 static void console_callback(struct work_struct *ignored)
2408 if (want_console >= 0) {
2409 if (want_console != fg_console &&
2410 vc_cons_allocated(want_console)) {
2411 hide_cursor(vc_cons[fg_console].d);
2412 change_console(vc_cons[want_console].d);
2413 /* we only changed when the console had already
2414 been allocated - a new console is not created
2415 in an interrupt routine */
2419 if (do_poke_blanked_console) { /* do not unblank for a LED change */
2420 do_poke_blanked_console = 0;
2421 poke_blanked_console();
2423 if (scrollback_delta) {
2424 struct vc_data *vc = vc_cons[fg_console].d;
2426 if (vc->vc_mode == KD_TEXT)
2427 vc->vc_sw->con_scrolldelta(vc, scrollback_delta);
2428 scrollback_delta = 0;
2430 if (blank_timer_expired) {
2432 blank_timer_expired = 0;
2434 notify_update(vc_cons[fg_console].d);
2439 int set_console(int nr)
2441 struct vc_data *vc = vc_cons[fg_console].d;
2443 if (!vc_cons_allocated(nr) || vt_dont_switch ||
2444 (vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) {
2447 * Console switch will fail in console_callback() or
2448 * change_console() so there is no point scheduling
2451 * Existing set_console() users don't check the return
2452 * value so this shouldn't break anything
2458 schedule_console_callback();
2463 struct tty_driver *console_driver;
2465 #ifdef CONFIG_VT_CONSOLE
2468 * vt_kmsg_redirect() - Sets/gets the kernel message console
2469 * @new: The new virtual terminal number or -1 if the console should stay
2472 * By default, the kernel messages are always printed on the current virtual
2473 * console. However, the user may modify that default with the
2474 * TIOCL_SETKMSGREDIRECT ioctl call.
2476 * This function sets the kernel message console to be @new. It returns the old
2477 * virtual console number. The virtual terminal number 0 (both as parameter and
2478 * return value) means no redirection (i.e. always printed on the currently
2481 * The parameter -1 means that only the current console is returned, but the
2482 * value is not modified. You may use the macro vt_get_kmsg_redirect() in that
2483 * case to make the code more understandable.
2485 * When the kernel is compiled without CONFIG_VT_CONSOLE, this function ignores
2486 * the parameter and always returns 0.
2488 int vt_kmsg_redirect(int new)
2490 static int kmsg_con;
2493 return xchg(&kmsg_con, new);
2499 * Console on virtual terminal
2501 * The console must be locked when we get here.
2504 static void vt_console_print(struct console *co, const char *b, unsigned count)
2506 struct vc_data *vc = vc_cons[fg_console].d;
2508 static DEFINE_SPINLOCK(printing_lock);
2509 const ushort *start;
2514 /* console busy or not yet initialized */
2517 if (!spin_trylock(&printing_lock))
2520 kmsg_console = vt_get_kmsg_redirect();
2521 if (kmsg_console && vc_cons_allocated(kmsg_console - 1))
2522 vc = vc_cons[kmsg_console - 1].d;
2524 /* read `x' only after setting currcons properly (otherwise
2525 the `x' macro will read the x of the foreground console). */
2528 if (!vc_cons_allocated(fg_console)) {
2530 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2534 if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc))
2537 /* undraw cursor first */
2541 start = (ushort *)vc->vc_pos;
2543 /* Contrived structure to try to emulate original need_wrap behaviour
2544 * Problems caused when we have need_wrap set on '\n' character */
2547 if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) {
2549 if (CON_IS_VISIBLE(vc))
2550 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2552 if (vc->vc_need_wrap)
2556 if (c == 8) { /* backspace */
2558 start = (ushort *)vc->vc_pos;
2565 start = (ushort *)vc->vc_pos;
2567 if (c == 10 || c == 13)
2570 scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos);
2571 notify_write(vc, c);
2573 if (myx == vc->vc_cols - 1) {
2574 vc->vc_need_wrap = 1;
2581 if (CON_IS_VISIBLE(vc))
2582 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2584 if (vc->vc_x == vc->vc_cols) {
2586 vc->vc_need_wrap = 1;
2593 spin_unlock(&printing_lock);
2596 static struct tty_driver *vt_console_device(struct console *c, int *index)
2598 *index = c->index ? c->index-1 : fg_console;
2599 return console_driver;
2602 static struct console vt_console_driver = {
2604 .write = vt_console_print,
2605 .device = vt_console_device,
2606 .unblank = unblank_screen,
2607 .flags = CON_PRINTBUFFER,
2613 * Handling of Linux-specific VC ioctls
2617 * Generally a bit racy with respect to console_lock();.
2619 * There are some functions which don't need it.
2621 * There are some functions which can sleep for arbitrary periods
2622 * (paste_selection) but we don't need the lock there anyway.
2624 * set_selection has locking, and definitely needs it
2627 int tioclinux(struct tty_struct *tty, unsigned long arg)
2630 char __user *p = (char __user *)arg;
2634 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN))
2636 if (get_user(type, p))
2644 ret = set_selection((struct tiocl_selection __user *)(p+1), tty);
2647 case TIOCL_PASTESEL:
2648 ret = paste_selection(tty);
2650 case TIOCL_UNBLANKSCREEN:
2655 case TIOCL_SELLOADLUT:
2656 ret = sel_loadlut(p);
2658 case TIOCL_GETSHIFTSTATE:
2661 * Make it possible to react to Shift+Mousebutton.
2662 * Note that 'shift_state' is an undocumented
2663 * kernel-internal variable; programs not closely
2664 * related to the kernel should not use this.
2667 ret = __put_user(data, p);
2669 case TIOCL_GETMOUSEREPORTING:
2670 data = mouse_reporting();
2671 ret = __put_user(data, p);
2673 case TIOCL_SETVESABLANK:
2674 ret = set_vesa_blanking(p);
2676 case TIOCL_GETKMSGREDIRECT:
2677 data = vt_get_kmsg_redirect();
2678 ret = __put_user(data, p);
2680 case TIOCL_SETKMSGREDIRECT:
2681 if (!capable(CAP_SYS_ADMIN)) {
2684 if (get_user(data, p+1))
2687 vt_kmsg_redirect(data);
2690 case TIOCL_GETFGCONSOLE:
2693 case TIOCL_SCROLLCONSOLE:
2694 if (get_user(lines, (s32 __user *)(p+4))) {
2697 scrollfront(vc_cons[fg_console].d, lines);
2701 case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
2707 case TIOCL_BLANKEDSCREEN:
2708 ret = console_blanked;
2718 * /dev/ttyN handling
2721 static int con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2725 retval = do_con_write(tty, buf, count);
2726 con_flush_chars(tty);
2731 static int con_put_char(struct tty_struct *tty, unsigned char ch)
2734 return 0; /* n_r3964 calls put_char() from interrupt context */
2735 return do_con_write(tty, &ch, 1);
2738 static int con_write_room(struct tty_struct *tty)
2742 return 32768; /* No limit, really; we're not buffering */
2745 static int con_chars_in_buffer(struct tty_struct *tty)
2747 return 0; /* we're not buffering */
2751 * con_throttle and con_unthrottle are only used for
2752 * paste_selection(), which has to stuff in a large number of
2755 static void con_throttle(struct tty_struct *tty)
2759 static void con_unthrottle(struct tty_struct *tty)
2761 struct vc_data *vc = tty->driver_data;
2763 wake_up_interruptible(&vc->paste_wait);
2767 * Turn the Scroll-Lock LED on when the tty is stopped
2769 static void con_stop(struct tty_struct *tty)
2774 console_num = tty->index;
2775 if (!vc_cons_allocated(console_num))
2777 set_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2782 * Turn the Scroll-Lock LED off when the console is started
2784 static void con_start(struct tty_struct *tty)
2789 console_num = tty->index;
2790 if (!vc_cons_allocated(console_num))
2792 clr_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2796 static void con_flush_chars(struct tty_struct *tty)
2800 if (in_interrupt()) /* from flush_to_ldisc */
2803 /* if we race with con_close(), vt may be null */
2805 vc = tty->driver_data;
2812 * Allocate the console screen memory.
2814 static int con_open(struct tty_struct *tty, struct file *filp)
2816 unsigned int currcons = tty->index;
2820 if (tty->driver_data == NULL) {
2821 ret = vc_allocate(currcons);
2823 struct vc_data *vc = vc_cons[currcons].d;
2825 /* Still being freed */
2828 return -ERESTARTSYS;
2830 tty->driver_data = vc;
2833 if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
2834 tty->winsize.ws_row = vc_cons[currcons].d->vc_rows;
2835 tty->winsize.ws_col = vc_cons[currcons].d->vc_cols;
2838 tty->termios->c_iflag |= IUTF8;
2840 tty->termios->c_iflag &= ~IUTF8;
2849 static void con_close(struct tty_struct *tty, struct file *filp)
2851 /* Nothing to do - we defer to shutdown */
2854 static void con_shutdown(struct tty_struct *tty)
2856 struct vc_data *vc = tty->driver_data;
2859 vc->port.tty = NULL;
2864 static int default_italic_color = 2; // green (ASCII)
2865 static int default_underline_color = 3; // cyan (ASCII)
2866 module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR);
2867 module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR);
2869 static void vc_init(struct vc_data *vc, unsigned int rows,
2870 unsigned int cols, int do_clear, int mode)
2876 vc->vc_size_row = cols << 1;
2877 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
2880 vc->vc_pos = vc->vc_origin;
2882 for (j=k=0; j<16; j++) {
2883 vc->vc_palette[k++] = default_red[j] ;
2884 vc->vc_palette[k++] = default_grn[j] ;
2885 vc->vc_palette[k++] = default_blu[j] ;
2887 vc->vc_def_color = 0x07; /* white */
2888 vc->vc_ulcolor = default_underline_color;
2889 vc->vc_itcolor = default_italic_color;
2890 vc->vc_halfcolor = 0x08; /* grey */
2891 init_waitqueue_head(&vc->paste_wait);
2892 reset_terminal(vc, do_clear);
2896 * This routine initializes console interrupts, and does nothing
2897 * else. If you want the screen to clear, call tty_write with
2898 * the appropriate escape-sequence.
2901 static int __init con_init(void)
2903 const char *display_desc = NULL;
2905 unsigned int currcons = 0, i;
2910 display_desc = conswitchp->con_startup();
2911 if (!display_desc) {
2917 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2918 struct con_driver *con_driver = ®istered_con_driver[i];
2920 if (con_driver->con == NULL) {
2921 con_driver->con = conswitchp;
2922 con_driver->desc = display_desc;
2923 con_driver->flag = CON_DRIVER_FLAG_INIT;
2924 con_driver->first = 0;
2925 con_driver->last = MAX_NR_CONSOLES - 1;
2930 for (i = 0; i < MAX_NR_CONSOLES; i++)
2931 con_driver_map[i] = conswitchp;
2933 if (blankinterval) {
2934 blank_state = blank_normal_wait;
2935 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
2938 if (vt_handoff >= 0) {
2939 currcons = vt_handoff;
2940 vc_cons[currcons].d = vc = kzalloc(sizeof(struct vc_data), GFP_NOWAIT);
2941 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
2942 visual_init(vc, currcons, 1);
2943 vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_NOWAIT);
2944 vc_init(vc, vc->vc_rows, vc->vc_cols, 0, KD_TRANSPARENT);
2946 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) {
2947 if (currcons == vt_handoff)
2949 vc_cons[currcons].d = vc = kzalloc(sizeof(struct vc_data), GFP_NOWAIT);
2950 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
2951 tty_port_init(&vc->port);
2952 visual_init(vc, currcons, 1);
2953 vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_NOWAIT);
2954 vc_init(vc, vc->vc_rows, vc->vc_cols,
2955 currcons || !vc->vc_sw->con_save_screen, KD_TEXT);
2957 currcons = fg_console = 0;
2958 if (vt_handoff >= 0) {
2959 printk(KERN_INFO "vt handoff: transparent VT on %d\n",
2961 currcons = fg_console = vt_handoff;
2963 master_display_fg = vc = vc_cons[currcons].d;
2966 gotoxy(vc, vc->vc_x, vc->vc_y);
2969 printk("Console: %s %s %dx%d",
2970 vc->vc_can_do_color ? "colour" : "mono",
2971 display_desc, vc->vc_cols, vc->vc_rows);
2977 #ifdef CONFIG_VT_CONSOLE
2978 register_console(&vt_console_driver);
2982 console_initcall(con_init);
2984 static const struct tty_operations con_ops = {
2988 .write_room = con_write_room,
2989 .put_char = con_put_char,
2990 .flush_chars = con_flush_chars,
2991 .chars_in_buffer = con_chars_in_buffer,
2993 #ifdef CONFIG_COMPAT
2994 .compat_ioctl = vt_compat_ioctl,
2998 .throttle = con_throttle,
2999 .unthrottle = con_unthrottle,
3000 .resize = vt_resize,
3001 .shutdown = con_shutdown
3004 static struct cdev vc0_cdev;
3006 static ssize_t show_tty_active(struct device *dev,
3007 struct device_attribute *attr, char *buf)
3009 return sprintf(buf, "tty%d\n", fg_console + 1);
3011 static DEVICE_ATTR(active, S_IRUGO, show_tty_active, NULL);
3013 int __init vty_init(const struct file_operations *console_fops)
3015 cdev_init(&vc0_cdev, console_fops);
3016 if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) ||
3017 register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0)
3018 panic("Couldn't register /dev/tty0 driver\n");
3019 tty0dev = device_create(tty_class, NULL, MKDEV(TTY_MAJOR, 0), NULL, "tty0");
3020 if (IS_ERR(tty0dev))
3023 WARN_ON(device_create_file(tty0dev, &dev_attr_active) < 0);
3027 console_driver = alloc_tty_driver(MAX_NR_CONSOLES);
3028 if (!console_driver)
3029 panic("Couldn't allocate console driver\n");
3030 console_driver->owner = THIS_MODULE;
3031 console_driver->name = "tty";
3032 console_driver->name_base = 1;
3033 console_driver->major = TTY_MAJOR;
3034 console_driver->minor_start = 1;
3035 console_driver->type = TTY_DRIVER_TYPE_CONSOLE;
3036 console_driver->init_termios = tty_std_termios;
3038 console_driver->init_termios.c_iflag |= IUTF8;
3039 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS;
3040 tty_set_operations(console_driver, &con_ops);
3041 if (tty_register_driver(console_driver))
3042 panic("Couldn't register console driver\n");
3045 #ifdef CONFIG_MDA_CONSOLE
3051 #ifndef VT_SINGLE_DRIVER
3053 static struct class *vtconsole_class;
3055 static int bind_con_driver(const struct consw *csw, int first, int last,
3058 struct module *owner = csw->owner;
3059 const char *desc = NULL;
3060 struct con_driver *con_driver;
3061 int i, j = -1, k = -1, retval = -ENODEV;
3063 if (!try_module_get(owner))
3068 /* check if driver is registered */
3069 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3070 con_driver = ®istered_con_driver[i];
3072 if (con_driver->con == csw) {
3073 desc = con_driver->desc;
3082 if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) {
3084 con_driver->flag |= CON_DRIVER_FLAG_INIT;
3089 module_put(conswitchp->owner);
3091 __module_get(owner);
3095 first = max(first, con_driver->first);
3096 last = min(last, con_driver->last);
3098 for (i = first; i <= last; i++) {
3100 struct vc_data *vc = vc_cons[i].d;
3102 if (con_driver_map[i])
3103 module_put(con_driver_map[i]->owner);
3104 __module_get(owner);
3105 con_driver_map[i] = csw;
3107 if (!vc || !vc->vc_sw)
3112 if (CON_IS_VISIBLE(vc)) {
3117 old_was_color = vc->vc_can_do_color;
3118 vc->vc_sw->con_deinit(vc);
3119 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
3120 visual_init(vc, i, 0);
3124 /* If the console changed between mono <-> color, then
3125 * the attributes in the screenbuf will be wrong. The
3126 * following resets all attributes to something sane.
3128 if (old_was_color != vc->vc_can_do_color)
3129 clear_buffer_attributes(vc);
3132 printk("Console: switching ");
3134 printk("consoles %d-%d ", first+1, last+1);
3136 struct vc_data *vc = vc_cons[j].d;
3138 printk("to %s %s %dx%d\n",
3139 vc->vc_can_do_color ? "colour" : "mono",
3140 desc, vc->vc_cols, vc->vc_rows);
3147 printk("to %s\n", desc);
3156 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
3157 static int con_is_graphics(const struct consw *csw, int first, int last)
3161 for (i = first; i <= last; i++) {
3162 struct vc_data *vc = vc_cons[i].d;
3164 if (vc && vc->vc_mode == KD_GRAPHICS) {
3174 * unbind_con_driver - unbind a console driver
3175 * @csw: pointer to console driver to unregister
3176 * @first: first in range of consoles that @csw should be unbound from
3177 * @last: last in range of consoles that @csw should be unbound from
3178 * @deflt: should next bound console driver be default after @csw is unbound?
3180 * To unbind a driver from all possible consoles, pass 0 as @first and
3181 * %MAX_NR_CONSOLES as @last.
3183 * @deflt controls whether the console that ends up replacing @csw should be
3184 * the default console.
3187 * -ENODEV if @csw isn't a registered console driver or can't be unregistered
3190 int unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
3192 struct module *owner = csw->owner;
3193 const struct consw *defcsw = NULL;
3194 struct con_driver *con_driver = NULL, *con_back = NULL;
3195 int i, retval = -ENODEV;
3197 if (!try_module_get(owner))
3202 /* check if driver is registered and if it is unbindable */
3203 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3204 con_driver = ®istered_con_driver[i];
3206 if (con_driver->con == csw &&
3207 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3220 /* check if backup driver exists */
3221 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3222 con_back = ®istered_con_driver[i];
3224 if (con_back->con &&
3225 !(con_back->flag & CON_DRIVER_FLAG_MODULE)) {
3226 defcsw = con_back->con;
3237 if (!con_is_bound(csw)) {
3242 first = max(first, con_driver->first);
3243 last = min(last, con_driver->last);
3245 for (i = first; i <= last; i++) {
3246 if (con_driver_map[i] == csw) {
3247 module_put(csw->owner);
3248 con_driver_map[i] = NULL;
3252 if (!con_is_bound(defcsw)) {
3253 const struct consw *defconsw = conswitchp;
3255 defcsw->con_startup();
3256 con_back->flag |= CON_DRIVER_FLAG_INIT;
3258 * vgacon may change the default driver to point
3259 * to dummycon, we restore it here...
3261 conswitchp = defconsw;
3264 if (!con_is_bound(csw))
3265 con_driver->flag &= ~CON_DRIVER_FLAG_INIT;
3268 /* ignore return value, binding should not fail */
3269 bind_con_driver(defcsw, first, last, deflt);
3275 EXPORT_SYMBOL(unbind_con_driver);
3277 static int vt_bind(struct con_driver *con)
3279 const struct consw *defcsw = NULL, *csw = NULL;
3280 int i, more = 1, first = -1, last = -1, deflt = 0;
3282 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3283 con_is_graphics(con->con, con->first, con->last))
3288 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3289 struct con_driver *con = ®istered_con_driver[i];
3291 if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) {
3303 for (i = con->first; i <= con->last; i++) {
3304 if (con_driver_map[i] == defcsw) {
3309 } else if (first != -1)
3313 if (first == 0 && last == MAX_NR_CONSOLES -1)
3317 bind_con_driver(csw, first, last, deflt);
3328 static int vt_unbind(struct con_driver *con)
3330 const struct consw *csw = NULL;
3331 int i, more = 1, first = -1, last = -1, deflt = 0;
3333 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3334 con_is_graphics(con->con, con->first, con->last))
3342 for (i = con->first; i <= con->last; i++) {
3343 if (con_driver_map[i] == csw) {
3348 } else if (first != -1)
3352 if (first == 0 && last == MAX_NR_CONSOLES -1)
3356 unbind_con_driver(csw, first, last, deflt);
3367 static inline int vt_bind(struct con_driver *con)
3371 static inline int vt_unbind(struct con_driver *con)
3375 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3377 static ssize_t store_bind(struct device *dev, struct device_attribute *attr,
3378 const char *buf, size_t count)
3380 struct con_driver *con = dev_get_drvdata(dev);
3381 int bind = simple_strtoul(buf, NULL, 0);
3391 static ssize_t show_bind(struct device *dev, struct device_attribute *attr,
3394 struct con_driver *con = dev_get_drvdata(dev);
3395 int bind = con_is_bound(con->con);
3397 return snprintf(buf, PAGE_SIZE, "%i\n", bind);
3400 static ssize_t show_name(struct device *dev, struct device_attribute *attr,
3403 struct con_driver *con = dev_get_drvdata(dev);
3405 return snprintf(buf, PAGE_SIZE, "%s %s\n",
3406 (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)",
3411 static struct device_attribute device_attrs[] = {
3412 __ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind),
3413 __ATTR(name, S_IRUGO, show_name, NULL),
3416 static int vtconsole_init_device(struct con_driver *con)
3421 con->flag |= CON_DRIVER_FLAG_ATTR;
3422 dev_set_drvdata(con->dev, con);
3423 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3424 error = device_create_file(con->dev, &device_attrs[i]);
3431 device_remove_file(con->dev, &device_attrs[i]);
3432 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3438 static void vtconsole_deinit_device(struct con_driver *con)
3442 if (con->flag & CON_DRIVER_FLAG_ATTR) {
3443 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3444 device_remove_file(con->dev, &device_attrs[i]);
3445 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3450 * con_is_bound - checks if driver is bound to the console
3451 * @csw: console driver
3453 * RETURNS: zero if unbound, nonzero if bound
3455 * Drivers can call this and if zero, they should release
3456 * all resources allocated on con_startup()
3458 int con_is_bound(const struct consw *csw)
3462 for (i = 0; i < MAX_NR_CONSOLES; i++) {
3463 if (con_driver_map[i] == csw) {
3471 EXPORT_SYMBOL(con_is_bound);
3474 * con_debug_enter - prepare the console for the kernel debugger
3475 * @sw: console driver
3477 * Called when the console is taken over by the kernel debugger, this
3478 * function needs to save the current console state, then put the console
3479 * into a state suitable for the kernel debugger.
3482 * Zero on success, nonzero if a failure occurred when trying to prepare
3483 * the console for the debugger.
3485 int con_debug_enter(struct vc_data *vc)
3489 saved_fg_console = fg_console;
3490 saved_last_console = last_console;
3491 saved_want_console = want_console;
3492 saved_vc_mode = vc->vc_mode;
3493 saved_console_blanked = console_blanked;
3494 vc->vc_mode = KD_TEXT;
3495 console_blanked = 0;
3496 if (vc->vc_sw->con_debug_enter)
3497 ret = vc->vc_sw->con_debug_enter(vc);
3498 #ifdef CONFIG_KGDB_KDB
3499 /* Set the initial LINES variable if it is not already set */
3500 if (vc->vc_rows < 999) {
3503 const char *setargs[3] = {
3508 if (kdbgetintenv(setargs[0], &linecount)) {
3509 snprintf(lns, 4, "%i", vc->vc_rows);
3510 kdb_set(2, setargs);
3513 #endif /* CONFIG_KGDB_KDB */
3516 EXPORT_SYMBOL_GPL(con_debug_enter);
3519 * con_debug_leave - restore console state
3520 * @sw: console driver
3522 * Restore the console state to what it was before the kernel debugger
3526 * Zero on success, nonzero if a failure occurred when trying to restore
3529 int con_debug_leave(void)
3534 fg_console = saved_fg_console;
3535 last_console = saved_last_console;
3536 want_console = saved_want_console;
3537 console_blanked = saved_console_blanked;
3538 vc_cons[fg_console].d->vc_mode = saved_vc_mode;
3540 vc = vc_cons[fg_console].d;
3541 if (vc->vc_sw->con_debug_leave)
3542 ret = vc->vc_sw->con_debug_leave(vc);
3545 EXPORT_SYMBOL_GPL(con_debug_leave);
3548 * register_con_driver - register console driver to console layer
3549 * @csw: console driver
3550 * @first: the first console to take over, minimum value is 0
3551 * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1
3553 * DESCRIPTION: This function registers a console driver which can later
3554 * bind to a range of consoles specified by @first and @last. It will
3555 * also initialize the console driver by calling con_startup().
3557 int register_con_driver(const struct consw *csw, int first, int last)
3559 struct module *owner = csw->owner;
3560 struct con_driver *con_driver;
3564 if (!try_module_get(owner))
3569 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3570 con_driver = ®istered_con_driver[i];
3572 /* already registered */
3573 if (con_driver->con == csw)
3580 desc = csw->con_startup();
3587 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3588 con_driver = ®istered_con_driver[i];
3590 if (con_driver->con == NULL) {
3591 con_driver->con = csw;
3592 con_driver->desc = desc;
3593 con_driver->node = i;
3594 con_driver->flag = CON_DRIVER_FLAG_MODULE |
3595 CON_DRIVER_FLAG_INIT;
3596 con_driver->first = first;
3597 con_driver->last = last;
3606 con_driver->dev = device_create(vtconsole_class, NULL,
3607 MKDEV(0, con_driver->node),
3611 if (IS_ERR(con_driver->dev)) {
3612 printk(KERN_WARNING "Unable to create device for %s; "
3613 "errno = %ld\n", con_driver->desc,
3614 PTR_ERR(con_driver->dev));
3615 con_driver->dev = NULL;
3617 vtconsole_init_device(con_driver);
3625 EXPORT_SYMBOL(register_con_driver);
3628 * unregister_con_driver - unregister console driver from console layer
3629 * @csw: console driver
3631 * DESCRIPTION: All drivers that registers to the console layer must
3632 * call this function upon exit, or if the console driver is in a state
3633 * where it won't be able to handle console services, such as the
3634 * framebuffer console without loaded framebuffer drivers.
3636 * The driver must unbind first prior to unregistration.
3638 int unregister_con_driver(const struct consw *csw)
3640 int i, retval = -ENODEV;
3644 /* cannot unregister a bound driver */
3645 if (con_is_bound(csw))
3648 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3649 struct con_driver *con_driver = ®istered_con_driver[i];
3651 if (con_driver->con == csw &&
3652 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3653 vtconsole_deinit_device(con_driver);
3654 device_destroy(vtconsole_class,
3655 MKDEV(0, con_driver->node));
3656 con_driver->con = NULL;
3657 con_driver->desc = NULL;
3658 con_driver->dev = NULL;
3659 con_driver->node = 0;
3660 con_driver->flag = 0;
3661 con_driver->first = 0;
3662 con_driver->last = 0;
3671 EXPORT_SYMBOL(unregister_con_driver);
3674 * If we support more console drivers, this function is used
3675 * when a driver wants to take over some existing consoles
3676 * and become default driver for newly opened ones.
3678 * take_over_console is basically a register followed by unbind
3680 int take_over_console(const struct consw *csw, int first, int last, int deflt)
3684 err = register_con_driver(csw, first, last);
3685 /* if we get an busy error we still want to bind the console driver
3686 * and return success, as we may have unbound the console driver
3687 Â * but not unregistered it.
3692 bind_con_driver(csw, first, last, deflt);
3698 * give_up_console is a wrapper to unregister_con_driver. It will only
3699 * work if driver is fully unbound.
3701 void give_up_console(const struct consw *csw)
3703 unregister_con_driver(csw);
3706 static int __init vtconsole_class_init(void)
3710 vtconsole_class = class_create(THIS_MODULE, "vtconsole");
3711 if (IS_ERR(vtconsole_class)) {
3712 printk(KERN_WARNING "Unable to create vt console class; "
3713 "errno = %ld\n", PTR_ERR(vtconsole_class));
3714 vtconsole_class = NULL;
3717 /* Add system drivers to sysfs */
3718 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3719 struct con_driver *con = ®istered_con_driver[i];
3721 if (con->con && !con->dev) {
3722 con->dev = device_create(vtconsole_class, NULL,
3723 MKDEV(0, con->node),
3727 if (IS_ERR(con->dev)) {
3728 printk(KERN_WARNING "Unable to create "
3729 "device for %s; errno = %ld\n",
3730 con->desc, PTR_ERR(con->dev));
3733 vtconsole_init_device(con);
3740 postcore_initcall(vtconsole_class_init);
3748 static int set_vesa_blanking(char __user *p)
3752 if (get_user(mode, p + 1))
3755 vesa_blank_mode = (mode < 4) ? mode : 0;
3759 void do_blank_screen(int entering_gfx)
3761 struct vc_data *vc = vc_cons[fg_console].d;
3764 WARN_CONSOLE_UNLOCKED();
3766 if (console_blanked) {
3767 if (blank_state == blank_vesa_wait) {
3768 blank_state = blank_off;
3769 vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0);
3774 /* entering graphics mode? */
3778 vc->vc_sw->con_blank(vc, -1, 1);
3779 console_blanked = fg_console + 1;
3780 blank_state = blank_off;
3785 if (blank_state != blank_normal_wait)
3787 blank_state = blank_off;
3789 /* don't blank graphics */
3790 if (vc->vc_mode != KD_TEXT) {
3791 console_blanked = fg_console + 1;
3796 del_timer_sync(&console_timer);
3797 blank_timer_expired = 0;
3800 /* In case we need to reset origin, blanking hook returns 1 */
3801 i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0);
3802 console_blanked = fg_console + 1;
3806 if (console_blank_hook && console_blank_hook(1))
3809 if (vesa_off_interval && vesa_blank_mode) {
3810 blank_state = blank_vesa_wait;
3811 mod_timer(&console_timer, jiffies + vesa_off_interval);
3813 vt_event_post(VT_EVENT_BLANK, vc->vc_num, vc->vc_num);
3815 EXPORT_SYMBOL(do_blank_screen);
3818 * Called by timer as well as from vt_console_driver
3820 void do_unblank_screen(int leaving_gfx)
3824 /* This should now always be called from a "sane" (read: can schedule)
3825 * context for the sake of the low level drivers, except in the special
3826 * case of oops_in_progress
3828 if (!oops_in_progress)
3831 WARN_CONSOLE_UNLOCKED();
3834 if (!console_blanked)
3836 if (!vc_cons_allocated(fg_console)) {
3838 printk("unblank_screen: tty %d not allocated ??\n", fg_console+1);
3841 vc = vc_cons[fg_console].d;
3842 /* Try to unblank in oops case too */
3843 if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc))
3844 return; /* but leave console_blanked != 0 */
3846 if (blankinterval) {
3847 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
3848 blank_state = blank_normal_wait;
3851 console_blanked = 0;
3852 if (vc->vc_sw->con_blank(vc, 0, leaving_gfx) || vt_force_oops_output(vc))
3853 /* Low-level driver cannot restore -> do it ourselves */
3855 if (console_blank_hook)
3856 console_blank_hook(0);
3859 vt_event_post(VT_EVENT_UNBLANK, vc->vc_num, vc->vc_num);
3861 EXPORT_SYMBOL(do_unblank_screen);
3864 * This is called by the outside world to cause a forced unblank, mostly for
3865 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
3866 * call it with 1 as an argument and so force a mode restore... that may kill
3867 * X or at least garbage the screen but would also make the Oops visible...
3869 void unblank_screen(void)
3871 do_unblank_screen(0);
3875 * We defer the timer blanking to work queue so it can take the console mutex
3876 * (console operations can still happen at irq time, but only from printk which
3877 * has the console mutex. Not perfect yet, but better than no locking
3879 static void blank_screen_t(unsigned long dummy)
3881 if (unlikely(!keventd_up())) {
3882 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
3885 blank_timer_expired = 1;
3886 schedule_work(&console_work);
3889 void poke_blanked_console(void)
3891 WARN_CONSOLE_UNLOCKED();
3893 /* Add this so we quickly catch whoever might call us in a non
3894 * safe context. Nowadays, unblank_screen() isn't to be called in
3895 * atomic contexts and is allowed to schedule (with the special case
3896 * of oops_in_progress, but that isn't of any concern for this
3901 /* This isn't perfectly race free, but a race here would be mostly harmless,
3902 * at worse, we'll do a spurrious blank and it's unlikely
3904 del_timer(&console_timer);
3905 blank_timer_expired = 0;
3907 if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS)
3909 if (console_blanked)
3911 else if (blankinterval) {
3912 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
3913 blank_state = blank_normal_wait;
3921 static void set_palette(struct vc_data *vc)
3923 WARN_CONSOLE_UNLOCKED();
3925 if (vc->vc_mode != KD_GRAPHICS)
3926 vc->vc_sw->con_set_palette(vc, color_table);
3929 static int set_get_cmap(unsigned char __user *arg, int set)
3933 WARN_CONSOLE_UNLOCKED();
3935 for (i = 0; i < 16; i++)
3937 get_user(default_red[i], arg++);
3938 get_user(default_grn[i], arg++);
3939 get_user(default_blu[i], arg++);
3941 put_user(default_red[i], arg++);
3942 put_user(default_grn[i], arg++);
3943 put_user(default_blu[i], arg++);
3946 for (i = 0; i < MAX_NR_CONSOLES; i++)
3947 if (vc_cons_allocated(i)) {
3948 for (j = k = 0; j < 16; j++) {
3949 vc_cons[i].d->vc_palette[k++] = default_red[j];
3950 vc_cons[i].d->vc_palette[k++] = default_grn[j];
3951 vc_cons[i].d->vc_palette[k++] = default_blu[j];
3953 set_palette(vc_cons[i].d);
3960 * Load palette into the DAC registers. arg points to a colour
3961 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
3964 int con_set_cmap(unsigned char __user *arg)
3969 rc = set_get_cmap (arg,1);
3975 int con_get_cmap(unsigned char __user *arg)
3980 rc = set_get_cmap (arg,0);
3986 void reset_palette(struct vc_data *vc)
3989 for (j=k=0; j<16; j++) {
3990 vc->vc_palette[k++] = default_red[j];
3991 vc->vc_palette[k++] = default_grn[j];
3992 vc->vc_palette[k++] = default_blu[j];
4000 * Currently we only support fonts up to 32 pixels wide, at a maximum height
4001 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
4002 * depending on width) reserved for each character which is kinda wasty, but
4003 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
4004 * is upto the actual low-level console-driver convert data into its favorite
4005 * format (maybe we should add a `fontoffset' field to the `display'
4006 * structure so we won't have to convert the fontdata all the time.
4010 #define max_font_size 65536
4012 static int con_font_get(struct vc_data *vc, struct console_font_op *op)
4014 struct console_font font;
4018 if (vc->vc_mode != KD_TEXT)
4022 font.data = kmalloc(max_font_size, GFP_KERNEL);
4029 if (vc->vc_sw->con_font_get)
4030 rc = vc->vc_sw->con_font_get(vc, &font);
4038 c = (font.width+7)/8 * 32 * font.charcount;
4040 if (op->data && font.charcount > op->charcount)
4042 if (!(op->flags & KD_FONT_FLAG_OLD)) {
4043 if (font.width > op->width || font.height > op->height)
4046 if (font.width != 8)
4048 else if ((op->height && font.height > op->height) ||
4055 op->height = font.height;
4056 op->width = font.width;
4057 op->charcount = font.charcount;
4059 if (op->data && copy_to_user(op->data, font.data, c))
4067 static int con_font_set(struct vc_data *vc, struct console_font_op *op)
4069 struct console_font font;
4073 if (vc->vc_mode != KD_TEXT)
4077 if (op->charcount > 512)
4079 if (!op->height) { /* Need to guess font height [compat] */
4081 u8 __user *charmap = op->data;
4084 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
4085 so that we can get rid of this soon */
4086 if (!(op->flags & KD_FONT_FLAG_OLD))
4088 for (h = 32; h > 0; h--)
4089 for (i = 0; i < op->charcount; i++) {
4090 if (get_user(tmp, &charmap[32*i+h-1]))
4099 if (op->width <= 0 || op->width > 32 || op->height > 32)
4101 size = (op->width+7)/8 * 32 * op->charcount;
4102 if (size > max_font_size)
4104 font.charcount = op->charcount;
4105 font.height = op->height;
4106 font.width = op->width;
4107 font.data = memdup_user(op->data, size);
4108 if (IS_ERR(font.data))
4109 return PTR_ERR(font.data);
4111 if (vc->vc_sw->con_font_set)
4112 rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
4120 static int con_font_default(struct vc_data *vc, struct console_font_op *op)
4122 struct console_font font = {.width = op->width, .height = op->height};
4123 char name[MAX_FONT_NAME];
4127 if (vc->vc_mode != KD_TEXT)
4132 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0)
4135 name[MAX_FONT_NAME - 1] = 0;
4138 if (vc->vc_sw->con_font_default)
4139 rc = vc->vc_sw->con_font_default(vc, &font, s);
4144 op->width = font.width;
4145 op->height = font.height;
4150 static int con_font_copy(struct vc_data *vc, struct console_font_op *op)
4152 int con = op->height;
4155 if (vc->vc_mode != KD_TEXT)
4159 if (!vc->vc_sw->con_font_copy)
4161 else if (con < 0 || !vc_cons_allocated(con))
4163 else if (con == vc->vc_num) /* nothing to do */
4166 rc = vc->vc_sw->con_font_copy(vc, con);
4171 int con_font_op(struct vc_data *vc, struct console_font_op *op)
4174 case KD_FONT_OP_SET:
4175 return con_font_set(vc, op);
4176 case KD_FONT_OP_GET:
4177 return con_font_get(vc, op);
4178 case KD_FONT_OP_SET_DEFAULT:
4179 return con_font_default(vc, op);
4180 case KD_FONT_OP_COPY:
4181 return con_font_copy(vc, op);
4187 * Interface exported to selection and vcs.
4190 /* used by selection */
4191 u16 screen_glyph(struct vc_data *vc, int offset)
4193 u16 w = scr_readw(screenpos(vc, offset, 1));
4196 if (w & vc->vc_hi_font_mask)
4200 EXPORT_SYMBOL_GPL(screen_glyph);
4202 /* used by vcs - note the word offset */
4203 unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed)
4205 return screenpos(vc, 2 * w_offset, viewed);
4208 void getconsxy(struct vc_data *vc, unsigned char *p)
4214 void putconsxy(struct vc_data *vc, unsigned char *p)
4217 gotoxy(vc, p[0], p[1]);
4221 u16 vcs_scr_readw(struct vc_data *vc, const u16 *org)
4223 if ((unsigned long)org == vc->vc_pos && softcursor_original != -1)
4224 return softcursor_original;
4225 return scr_readw(org);
4228 void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org)
4230 scr_writew(val, org);
4231 if ((unsigned long)org == vc->vc_pos) {
4232 softcursor_original = -1;
4237 void vcs_scr_updated(struct vc_data *vc)
4243 * Visible symbols for modules
4246 EXPORT_SYMBOL(color_table);
4247 EXPORT_SYMBOL(default_red);
4248 EXPORT_SYMBOL(default_grn);
4249 EXPORT_SYMBOL(default_blu);
4250 EXPORT_SYMBOL(update_region);
4251 EXPORT_SYMBOL(redraw_screen);
4252 EXPORT_SYMBOL(vc_resize);
4253 EXPORT_SYMBOL(fg_console);
4254 EXPORT_SYMBOL(console_blank_hook);
4255 EXPORT_SYMBOL(console_blanked);
4256 EXPORT_SYMBOL(vc_cons);
4257 EXPORT_SYMBOL(global_cursor_default);
4258 #ifndef VT_SINGLE_DRIVER
4259 EXPORT_SYMBOL(take_over_console);
4260 EXPORT_SYMBOL(give_up_console);