2 * Copyright (C) 1991, 1992 Linus Torvalds
6 * Hopefully this will be a rather complete VT102 implementation.
8 * Beeping thanks to John T Kohl.
10 * Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics
11 * Chars, and VT100 enhancements by Peter MacDonald.
13 * Copy and paste function by Andrew Haylett,
14 * some enhancements by Alessandro Rubini.
16 * Code to check for different video-cards mostly by Galen Hunt,
17 * <g-hunt@ee.utah.edu>
19 * Rudimentary ISO 10646/Unicode/UTF-8 character set support by
20 * Markus Kuhn, <mskuhn@immd4.informatik.uni-erlangen.de>.
22 * Dynamic allocation of consoles, aeb@cwi.nl, May 1994
23 * Resizing of consoles, aeb, 940926
25 * Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94
28 * User-defined bell sound, new setterm control sequences and printk
29 * redirection by Martin Mares <mj@k332.feld.cvut.cz> 19-Nov-95
31 * APM screenblank bug fixed Takashi Manabe <manabe@roy.dsl.tutics.tut.jp>
33 * Merge with the abstract console driver by Geert Uytterhoeven
34 * <geert@linux-m68k.org>, Jan 1997.
36 * Original m68k console driver modifications by
38 * - Arno Griffioen <arno@usn.nl>
39 * - David Carter <carter@cs.bris.ac.uk>
41 * The abstract console driver provides a generic interface for a text
42 * console. It supports VGA text mode, frame buffer based graphical consoles
43 * and special graphics processors that are only accessible through some
44 * registers (e.g. a TMS340x0 GSP).
46 * The interface to the hardware is specified using a special structure
47 * (struct consw) which contains function pointers to console operations
48 * (see <linux/console.h> for more information).
50 * Support for changeable cursor shape
51 * by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997
53 * Ported to i386 and con_scrolldelta fixed
54 * by Emmanuel Marty <core@ggi-project.org>, April 1998
56 * Resurrected character buffers in videoram plus lots of other trickery
57 * by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998
59 * Removed old-style timers, introduced console_timer, made timer
60 * deletion SMP-safe. 17Jun00, Andrew Morton
62 * Removed console_lock, enabled interrupts across all console operations
63 * 13 March 2001, Andrew Morton
65 * Fixed UTF-8 mode so alternate charset modes always work according
66 * to control sequences interpreted in do_con_trol function
67 * preserving backward VT100 semigraphics compatibility,
68 * malformed UTF sequences represented as sequences of replacement glyphs,
69 * original codes or '?' as a last resort if replacement glyph is undefined
70 * by Adam Tla/lka <atlka@pg.gda.pl>, Aug 2006
73 #include <linux/module.h>
74 #include <linux/types.h>
75 #include <linux/sched.h>
76 #include <linux/tty.h>
77 #include <linux/tty_flip.h>
78 #include <linux/kernel.h>
79 #include <linux/string.h>
80 #include <linux/errno.h>
82 #include <linux/slab.h>
83 #include <linux/major.h>
85 #include <linux/console.h>
86 #include <linux/init.h>
87 #include <linux/mutex.h>
88 #include <linux/vt_kern.h>
89 #include <linux/selection.h>
90 #include <linux/tiocl.h>
91 #include <linux/kbd_kern.h>
92 #include <linux/consolemap.h>
93 #include <linux/timer.h>
94 #include <linux/interrupt.h>
95 #include <linux/workqueue.h>
97 #include <linux/font.h>
98 #include <linux/bitops.h>
99 #include <linux/notifier.h>
100 #include <linux/device.h>
101 #include <linux/io.h>
102 #include <asm/system.h>
103 #include <linux/uaccess.h>
104 #include <linux/kdb.h>
105 #include <linux/ctype.h>
107 #define MAX_NR_CON_DRIVER 16
109 #define CON_DRIVER_FLAG_MODULE 1
110 #define CON_DRIVER_FLAG_INIT 2
111 #define CON_DRIVER_FLAG_ATTR 4
114 const struct consw *con;
123 static struct con_driver registered_con_driver[MAX_NR_CON_DRIVER];
124 const struct consw *conswitchp;
126 /* A bitmap for codes <32. A bit of 1 indicates that the code
127 * corresponding to that bit number invokes some special action
128 * (such as cursor movement) and should not be displayed as a
129 * glyph unless the disp_ctrl mode is explicitly enabled.
131 #define CTRL_ACTION 0x0d00ff81
132 #define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */
135 * Here is the default bell parameters: 750HZ, 1/8th of a second
137 #define DEFAULT_BELL_PITCH 750
138 #define DEFAULT_BELL_DURATION (HZ/8)
140 struct vc vc_cons [MAX_NR_CONSOLES];
142 #ifndef VT_SINGLE_DRIVER
143 static const struct consw *con_driver_map[MAX_NR_CONSOLES];
146 static int con_open(struct tty_struct *, struct file *);
147 static void vc_init(struct vc_data *vc, unsigned int rows,
148 unsigned int cols, int do_clear);
149 static void gotoxy(struct vc_data *vc, int new_x, int new_y);
150 static void save_cur(struct vc_data *vc);
151 static void reset_terminal(struct vc_data *vc, int do_clear);
152 static void con_flush_chars(struct tty_struct *tty);
153 static int set_vesa_blanking(char __user *p);
154 static void set_cursor(struct vc_data *vc);
155 static void hide_cursor(struct vc_data *vc);
156 static void console_callback(struct work_struct *ignored);
157 static void blank_screen_t(unsigned long dummy);
158 static void set_palette(struct vc_data *vc);
160 static int printable; /* Is console ready for printing? */
161 int default_utf8 = true;
162 module_param(default_utf8, int, S_IRUGO | S_IWUSR);
163 int global_cursor_default = -1;
164 module_param(global_cursor_default, int, S_IRUGO | S_IWUSR);
166 static int cur_default = CUR_DEFAULT;
167 module_param(cur_default, int, S_IRUGO | S_IWUSR);
170 * ignore_poke: don't unblank the screen when things are typed. This is
171 * mainly for the privacy of braille terminal users.
173 static int ignore_poke;
175 int do_poke_blanked_console;
178 static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
179 static int vesa_off_interval;
180 static int blankinterval = 10*60;
181 core_param(consoleblank, blankinterval, int, 0444);
183 static DECLARE_WORK(console_work, console_callback);
186 * fg_console is the current virtual console,
187 * last_console is the last used one,
188 * want_console is the console we want to switch to,
189 * saved_* variants are for save/restore around kernel debugger enter/leave
193 int want_console = -1;
194 static int saved_fg_console;
195 static int saved_last_console;
196 static int saved_want_console;
197 static int saved_vc_mode;
198 static int saved_console_blanked;
201 * For each existing display, we have a pointer to console currently visible
202 * on that display, allowing consoles other than fg_console to be refreshed
203 * appropriately. Unless the low-level driver supplies its own display_fg
204 * variable, we use this one for the "master display".
206 static struct vc_data *master_display_fg;
209 * Unfortunately, we need to delay tty echo when we're currently writing to the
210 * console since the code is (and always was) not re-entrant, so we schedule
211 * all flip requests to process context with schedule-task() and run it from
212 * console_callback().
216 * For the same reason, we defer scrollback to the console callback.
218 static int scrollback_delta;
221 * Hook so that the power management routines can (un)blank
222 * the console on our behalf.
224 int (*console_blank_hook)(int);
226 static DEFINE_TIMER(console_timer, blank_screen_t, 0, 0);
227 static int blank_state;
228 static int blank_timer_expired;
236 * /sys/class/tty/tty0/
238 * the attribute 'active' contains the name of the current vc
239 * console and it supports poll() to detect vc switches
241 static struct device *tty0dev;
244 * Notifier list for console events.
246 static ATOMIC_NOTIFIER_HEAD(vt_notifier_list);
248 int register_vt_notifier(struct notifier_block *nb)
250 return atomic_notifier_chain_register(&vt_notifier_list, nb);
252 EXPORT_SYMBOL_GPL(register_vt_notifier);
254 int unregister_vt_notifier(struct notifier_block *nb)
256 return atomic_notifier_chain_unregister(&vt_notifier_list, nb);
258 EXPORT_SYMBOL_GPL(unregister_vt_notifier);
260 static void notify_write(struct vc_data *vc, unsigned int unicode)
262 struct vt_notifier_param param = { .vc = vc, unicode = unicode };
263 atomic_notifier_call_chain(&vt_notifier_list, VT_WRITE, ¶m);
266 static void notify_update(struct vc_data *vc)
268 struct vt_notifier_param param = { .vc = vc };
269 atomic_notifier_call_chain(&vt_notifier_list, VT_UPDATE, ¶m);
272 * Low-Level Functions
275 #define IS_FG(vc) ((vc)->vc_num == fg_console)
277 #ifdef VT_BUF_VRAM_ONLY
278 #define DO_UPDATE(vc) 0
280 #define DO_UPDATE(vc) (CON_IS_VISIBLE(vc) && !console_blanked)
283 static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed)
288 p = (unsigned short *)(vc->vc_origin + offset);
289 else if (!vc->vc_sw->con_screen_pos)
290 p = (unsigned short *)(vc->vc_visible_origin + offset);
292 p = vc->vc_sw->con_screen_pos(vc, offset);
296 /* Called from the keyboard irq path.. */
297 static inline void scrolldelta(int lines)
300 /* scrolldelta needs some kind of consistency lock, but the BKL was
301 and still is not protecting versus the scheduled back end */
302 scrollback_delta += lines;
303 schedule_console_callback();
306 void schedule_console_callback(void)
308 schedule_work(&console_work);
311 static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
313 unsigned short *d, *s;
317 if (b > vc->vc_rows || t >= b || nr < 1)
319 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr))
321 d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
322 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr));
323 scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row);
324 scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_video_erase_char,
325 vc->vc_size_row * nr);
328 static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
335 if (b > vc->vc_rows || t >= b || nr < 1)
337 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr))
339 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
340 step = vc->vc_cols * nr;
341 scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row);
342 scr_memsetw(s, vc->vc_video_erase_char, 2 * step);
345 static void do_update_region(struct vc_data *vc, unsigned long start, int count)
347 #ifndef VT_BUF_VRAM_ONLY
348 unsigned int xx, yy, offset;
352 if (!vc->vc_sw->con_getxy) {
353 offset = (start - vc->vc_origin) / 2;
354 xx = offset % vc->vc_cols;
355 yy = offset / vc->vc_cols;
358 start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy);
362 u16 attrib = scr_readw(p) & 0xff00;
365 while (xx < vc->vc_cols && count) {
366 if (attrib != (scr_readw(p) & 0xff00)) {
368 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
371 attrib = scr_readw(p) & 0xff00;
378 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
383 if (vc->vc_sw->con_getxy) {
385 start = vc->vc_sw->con_getxy(vc, start, NULL, NULL);
391 void update_region(struct vc_data *vc, unsigned long start, int count)
393 WARN_CONSOLE_UNLOCKED();
397 do_update_region(vc, start, count);
402 /* Structure of attributes is hardware-dependent */
404 static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink,
405 u8 _underline, u8 _reverse, u8 _italic)
407 if (vc->vc_sw->con_build_attr)
408 return vc->vc_sw->con_build_attr(vc, _color, _intensity,
409 _blink, _underline, _reverse, _italic);
411 #ifndef VT_BUF_VRAM_ONLY
413 * ++roman: I completely changed the attribute format for monochrome
414 * mode (!can_do_color). The formerly used MDA (monochrome display
415 * adapter) format didn't allow the combination of certain effects.
416 * Now the attribute is just a bit vector:
417 * Bit 0..1: intensity (0..2)
424 if (!vc->vc_can_do_color)
427 (_underline ? 4 : 0) |
431 a = (a & 0xF0) | vc->vc_itcolor;
433 a = (a & 0xf0) | vc->vc_ulcolor;
434 else if (_intensity == 0)
435 a = (a & 0xf0) | vc->vc_ulcolor;
437 a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77);
442 if (vc->vc_hi_font_mask == 0x100)
451 static void update_attr(struct vc_data *vc)
453 vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity,
454 vc->vc_blink, vc->vc_underline,
455 vc->vc_reverse ^ vc->vc_decscnm, vc->vc_italic);
456 vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm, 0) << 8) | ' ';
459 /* Note: inverting the screen twice should revert to the original state */
460 void invert_screen(struct vc_data *vc, int offset, int count, int viewed)
464 WARN_CONSOLE_UNLOCKED();
467 p = screenpos(vc, offset, viewed);
468 if (vc->vc_sw->con_invert_region)
469 vc->vc_sw->con_invert_region(vc, p, count);
470 #ifndef VT_BUF_VRAM_ONLY
476 if (!vc->vc_can_do_color) {
483 } else if (vc->vc_hi_font_mask == 0x100) {
486 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4);
493 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4);
501 do_update_region(vc, (unsigned long) p, count);
504 /* used by selection: complement pointer position */
505 void complement_pos(struct vc_data *vc, int offset)
507 static int old_offset = -1;
508 static unsigned short old;
509 static unsigned short oldx, oldy;
511 WARN_CONSOLE_UNLOCKED();
513 if (old_offset != -1 && old_offset >= 0 &&
514 old_offset < vc->vc_screenbuf_size) {
515 scr_writew(old, screenpos(vc, old_offset, 1));
517 vc->vc_sw->con_putc(vc, old, oldy, oldx);
522 if (offset != -1 && offset >= 0 &&
523 offset < vc->vc_screenbuf_size) {
526 p = screenpos(vc, offset, 1);
528 new = old ^ vc->vc_complement_mask;
531 oldx = (offset >> 1) % vc->vc_cols;
532 oldy = (offset >> 1) / vc->vc_cols;
533 vc->vc_sw->con_putc(vc, new, oldy, oldx);
539 static void insert_char(struct vc_data *vc, unsigned int nr)
541 unsigned short *p, *q = (unsigned short *)vc->vc_pos;
543 p = q + vc->vc_cols - nr - vc->vc_x;
545 scr_writew(scr_readw(p), p + nr);
546 scr_memsetw(q, vc->vc_video_erase_char, nr * 2);
547 vc->vc_need_wrap = 0;
549 unsigned short oldattr = vc->vc_attr;
550 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x, vc->vc_y, vc->vc_x + nr, 1,
551 vc->vc_cols - vc->vc_x - nr);
552 vc->vc_attr = vc->vc_video_erase_char >> 8;
554 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y, vc->vc_x + nr);
555 vc->vc_attr = oldattr;
559 static void delete_char(struct vc_data *vc, unsigned int nr)
561 unsigned int i = vc->vc_x;
562 unsigned short *p = (unsigned short *)vc->vc_pos;
564 while (++i <= vc->vc_cols - nr) {
565 scr_writew(scr_readw(p+nr), p);
568 scr_memsetw(p, vc->vc_video_erase_char, nr * 2);
569 vc->vc_need_wrap = 0;
571 unsigned short oldattr = vc->vc_attr;
572 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x + nr, vc->vc_y, vc->vc_x, 1,
573 vc->vc_cols - vc->vc_x - nr);
574 vc->vc_attr = vc->vc_video_erase_char >> 8;
576 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y,
577 vc->vc_cols - 1 - nr);
578 vc->vc_attr = oldattr;
582 static int softcursor_original;
584 static void add_softcursor(struct vc_data *vc)
586 int i = scr_readw((u16 *) vc->vc_pos);
587 u32 type = vc->vc_cursor_type;
589 if (! (type & 0x10)) return;
590 if (softcursor_original != -1) return;
591 softcursor_original = i;
592 i |= ((type >> 8) & 0xff00 );
593 i ^= ((type) & 0xff00 );
594 if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000;
595 if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700;
596 scr_writew(i, (u16 *) vc->vc_pos);
598 vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x);
601 static void hide_softcursor(struct vc_data *vc)
603 if (softcursor_original != -1) {
604 scr_writew(softcursor_original, (u16 *)vc->vc_pos);
606 vc->vc_sw->con_putc(vc, softcursor_original,
608 softcursor_original = -1;
612 static void hide_cursor(struct vc_data *vc)
616 vc->vc_sw->con_cursor(vc, CM_ERASE);
620 static void set_cursor(struct vc_data *vc)
622 if (!IS_FG(vc) || console_blanked ||
623 vc->vc_mode == KD_GRAPHICS)
629 if ((vc->vc_cursor_type & 0x0f) != 1)
630 vc->vc_sw->con_cursor(vc, CM_DRAW);
635 static void set_origin(struct vc_data *vc)
637 WARN_CONSOLE_UNLOCKED();
639 if (!CON_IS_VISIBLE(vc) ||
640 !vc->vc_sw->con_set_origin ||
641 !vc->vc_sw->con_set_origin(vc))
642 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
643 vc->vc_visible_origin = vc->vc_origin;
644 vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size;
645 vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x;
648 static inline void save_screen(struct vc_data *vc)
650 WARN_CONSOLE_UNLOCKED();
652 if (vc->vc_sw->con_save_screen)
653 vc->vc_sw->con_save_screen(vc);
657 * Redrawing of screen
660 static void clear_buffer_attributes(struct vc_data *vc)
662 unsigned short *p = (unsigned short *)vc->vc_origin;
663 int count = vc->vc_screenbuf_size / 2;
664 int mask = vc->vc_hi_font_mask | 0xff;
666 for (; count > 0; count--, p++) {
667 scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p);
671 void redraw_screen(struct vc_data *vc, int is_switch)
675 WARN_CONSOLE_UNLOCKED();
679 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
684 struct vc_data *old_vc = vc_cons[fg_console].d;
687 if (!CON_IS_VISIBLE(vc))
689 *vc->vc_display_fg = vc;
690 fg_console = vc->vc_num;
692 if (!CON_IS_VISIBLE(old_vc)) {
697 sysfs_notify(&tty0dev->kobj, NULL, "active");
705 int old_was_color = vc->vc_can_do_color;
708 update = vc->vc_sw->con_switch(vc);
711 * If console changed from mono<->color, the best we can do
712 * is to clear the buffer attributes. As it currently stands,
713 * rebuilding new attributes from the old buffer is not doable
714 * without overly complex code.
716 if (old_was_color != vc->vc_can_do_color) {
718 clear_buffer_attributes(vc);
721 /* Forcibly update if we're panicing */
722 if ((update && vc->vc_mode != KD_GRAPHICS) ||
723 vt_force_oops_output(vc))
724 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
729 compute_shiftstate();
735 * Allocation, freeing and resizing of VTs.
738 int vc_cons_allocated(unsigned int i)
740 return (i < MAX_NR_CONSOLES && vc_cons[i].d);
743 static void visual_init(struct vc_data *vc, int num, int init)
745 /* ++Geert: vc->vc_sw->con_init determines console size */
747 module_put(vc->vc_sw->owner);
748 vc->vc_sw = conswitchp;
749 #ifndef VT_SINGLE_DRIVER
750 if (con_driver_map[num])
751 vc->vc_sw = con_driver_map[num];
753 __module_get(vc->vc_sw->owner);
755 vc->vc_display_fg = &master_display_fg;
756 vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir;
757 vc->vc_uni_pagedir = 0;
758 vc->vc_hi_font_mask = 0;
759 vc->vc_complement_mask = 0;
760 vc->vc_can_do_color = 0;
761 vc->vc_panic_force_write = false;
762 vc->vc_sw->con_init(vc, init);
763 if (!vc->vc_complement_mask)
764 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
765 vc->vc_s_complement_mask = vc->vc_complement_mask;
766 vc->vc_size_row = vc->vc_cols << 1;
767 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
770 int vc_allocate(unsigned int currcons) /* return 0 on success */
772 WARN_CONSOLE_UNLOCKED();
774 if (currcons >= MAX_NR_CONSOLES)
776 if (!vc_cons[currcons].d) {
778 struct vt_notifier_param param;
780 /* prevent users from taking too much memory */
781 if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE))
784 /* due to the granularity of kmalloc, we waste some memory here */
785 /* the alloc is done in two steps, to optimize the common situation
786 of a 25x80 console (structsize=216, screenbuf_size=4000) */
787 /* although the numbers above are not valid since long ago, the
788 point is still up-to-date and the comment still has its value
789 even if only as a historical artifact. --mj, July 1998 */
790 param.vc = vc = kzalloc(sizeof(struct vc_data), GFP_KERNEL);
793 vc_cons[currcons].d = vc;
794 tty_port_init(&vc->port);
795 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
796 visual_init(vc, currcons, 1);
797 if (!*vc->vc_uni_pagedir_loc)
798 con_set_default_unimap(vc);
799 vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL);
800 if (!vc->vc_screenbuf) {
802 vc_cons[currcons].d = NULL;
806 /* If no drivers have overridden us and the user didn't pass a
807 boot option, default to displaying the cursor */
808 if (global_cursor_default == -1)
809 global_cursor_default = 1;
811 vc_init(vc, vc->vc_rows, vc->vc_cols, 1);
812 vcs_make_sysfs(currcons);
813 atomic_notifier_call_chain(&vt_notifier_list, VT_ALLOCATE, ¶m);
818 static inline int resize_screen(struct vc_data *vc, int width, int height,
821 /* Resizes the resolution of the display adapater */
824 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize)
825 err = vc->vc_sw->con_resize(vc, width, height, user);
831 * Change # of rows and columns (0 means unchanged/the size of fg_console)
832 * [this is to be used together with some user program
833 * like resize that changes the hardware videomode]
835 #define VC_RESIZE_MAXCOL (32767)
836 #define VC_RESIZE_MAXROW (32767)
839 * vc_do_resize - resizing method for the tty
840 * @tty: tty being resized
841 * @real_tty: real tty (different to tty if a pty/tty pair)
842 * @vc: virtual console private data
846 * Resize a virtual console, clipping according to the actual constraints.
847 * If the caller passes a tty structure then update the termios winsize
848 * information and perform any necessary signal handling.
850 * Caller must hold the console semaphore. Takes the termios mutex and
851 * ctrl_lock of the tty IFF a tty is passed.
854 static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc,
855 unsigned int cols, unsigned int lines)
857 unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0;
859 unsigned int old_rows, old_row_size;
860 unsigned int new_cols, new_rows, new_row_size, new_screen_size;
862 unsigned short *newscreen;
864 WARN_CONSOLE_UNLOCKED();
869 user = vc->vc_resize_user;
870 vc->vc_resize_user = 0;
872 if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW)
875 new_cols = (cols ? cols : vc->vc_cols);
876 new_rows = (lines ? lines : vc->vc_rows);
877 new_row_size = new_cols << 1;
878 new_screen_size = new_row_size * new_rows;
880 if (new_cols == vc->vc_cols && new_rows == vc->vc_rows)
883 newscreen = kmalloc(new_screen_size, GFP_USER);
887 old_rows = vc->vc_rows;
888 old_row_size = vc->vc_size_row;
890 err = resize_screen(vc, new_cols, new_rows, user);
896 vc->vc_rows = new_rows;
897 vc->vc_cols = new_cols;
898 vc->vc_size_row = new_row_size;
899 vc->vc_screenbuf_size = new_screen_size;
901 rlth = min(old_row_size, new_row_size);
902 rrem = new_row_size - rlth;
903 old_origin = vc->vc_origin;
904 new_origin = (long) newscreen;
905 new_scr_end = new_origin + new_screen_size;
907 if (vc->vc_y > new_rows) {
908 if (old_rows - vc->vc_y < new_rows) {
910 * Cursor near the bottom, copy contents from the
913 old_origin += (old_rows - new_rows) * old_row_size;
916 * Cursor is in no man's land, copy 1/2 screenful
917 * from the top and bottom of cursor position
919 old_origin += (vc->vc_y - new_rows/2) * old_row_size;
923 end = old_origin + old_row_size * min(old_rows, new_rows);
927 while (old_origin < end) {
928 scr_memcpyw((unsigned short *) new_origin,
929 (unsigned short *) old_origin, rlth);
931 scr_memsetw((void *)(new_origin + rlth),
932 vc->vc_video_erase_char, rrem);
933 old_origin += old_row_size;
934 new_origin += new_row_size;
936 if (new_scr_end > new_origin)
937 scr_memsetw((void *)new_origin, vc->vc_video_erase_char,
938 new_scr_end - new_origin);
939 kfree(vc->vc_screenbuf);
940 vc->vc_screenbuf = newscreen;
941 vc->vc_screenbuf_size = new_screen_size;
944 /* do part of a reset_terminal() */
946 vc->vc_bottom = vc->vc_rows;
947 gotoxy(vc, vc->vc_x, vc->vc_y);
951 /* Rewrite the requested winsize data with the actual
954 memset(&ws, 0, sizeof(ws));
955 ws.ws_row = vc->vc_rows;
956 ws.ws_col = vc->vc_cols;
957 ws.ws_ypixel = vc->vc_scan_lines;
958 tty_do_resize(tty, &ws);
961 if (CON_IS_VISIBLE(vc))
963 vt_event_post(VT_EVENT_RESIZE, vc->vc_num, vc->vc_num);
968 * vc_resize - resize a VT
969 * @vc: virtual console
973 * Resize a virtual console as seen from the console end of things. We
974 * use the common vc_do_resize methods to update the structures. The
975 * caller must hold the console sem to protect console internals and
979 int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int rows)
981 return vc_do_resize(vc->port.tty, vc, cols, rows);
985 * vt_resize - resize a VT
986 * @tty: tty to resize
987 * @ws: winsize attributes
989 * Resize a virtual terminal. This is called by the tty layer as we
990 * register our own handler for resizing. The mutual helper does all
993 * Takes the console sem and the called methods then take the tty
994 * termios_mutex and the tty ctrl_lock in that order.
996 static int vt_resize(struct tty_struct *tty, struct winsize *ws)
998 struct vc_data *vc = tty->driver_data;
1002 ret = vc_do_resize(tty, vc, ws->ws_col, ws->ws_row);
1007 void vc_deallocate(unsigned int currcons)
1009 WARN_CONSOLE_UNLOCKED();
1011 if (vc_cons_allocated(currcons)) {
1012 struct vc_data *vc = vc_cons[currcons].d;
1013 struct vt_notifier_param param = { .vc = vc };
1015 atomic_notifier_call_chain(&vt_notifier_list, VT_DEALLOCATE, ¶m);
1016 vcs_remove_sysfs(currcons);
1017 vc->vc_sw->con_deinit(vc);
1018 put_pid(vc->vt_pid);
1019 module_put(vc->vc_sw->owner);
1020 kfree(vc->vc_screenbuf);
1021 if (currcons >= MIN_NR_CONSOLES)
1023 vc_cons[currcons].d = NULL;
1031 #define set_kbd(vc, x) set_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1032 #define clr_kbd(vc, x) clr_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1033 #define is_kbd(vc, x) vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1035 #define decarm VC_REPEAT
1036 #define decckm VC_CKMODE
1037 #define kbdapplic VC_APPLIC
1041 * this is what the terminal answers to a ESC-Z or csi0c query.
1043 #define VT100ID "\033[?1;2c"
1044 #define VT102ID "\033[?6c"
1046 unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7,
1047 8,12,10,14, 9,13,11,15 };
1049 /* the default colour table, for VGA+ colour systems */
1050 int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
1051 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
1052 int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
1053 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
1054 int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
1055 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
1057 module_param_array(default_red, int, NULL, S_IRUGO | S_IWUSR);
1058 module_param_array(default_grn, int, NULL, S_IRUGO | S_IWUSR);
1059 module_param_array(default_blu, int, NULL, S_IRUGO | S_IWUSR);
1062 * gotoxy() must verify all boundaries, because the arguments
1063 * might also be negative. If the given position is out of
1064 * bounds, the cursor is placed at the nearest margin.
1066 static void gotoxy(struct vc_data *vc, int new_x, int new_y)
1073 if (new_x >= vc->vc_cols)
1074 vc->vc_x = vc->vc_cols - 1;
1081 max_y = vc->vc_bottom;
1084 max_y = vc->vc_rows;
1088 else if (new_y >= max_y)
1089 vc->vc_y = max_y - 1;
1092 vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1);
1093 vc->vc_need_wrap = 0;
1096 /* for absolute user moves, when decom is set */
1097 static void gotoxay(struct vc_data *vc, int new_x, int new_y)
1099 gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y);
1102 void scrollback(struct vc_data *vc, int lines)
1105 lines = vc->vc_rows / 2;
1106 scrolldelta(-lines);
1109 void scrollfront(struct vc_data *vc, int lines)
1112 lines = vc->vc_rows / 2;
1116 static void lf(struct vc_data *vc)
1118 /* don't scroll if above bottom of scrolling region, or
1119 * if below scrolling region
1121 if (vc->vc_y + 1 == vc->vc_bottom)
1122 scrup(vc, vc->vc_top, vc->vc_bottom, 1);
1123 else if (vc->vc_y < vc->vc_rows - 1) {
1125 vc->vc_pos += vc->vc_size_row;
1127 vc->vc_need_wrap = 0;
1128 notify_write(vc, '\n');
1131 static void ri(struct vc_data *vc)
1133 /* don't scroll if below top of scrolling region, or
1134 * if above scrolling region
1136 if (vc->vc_y == vc->vc_top)
1137 scrdown(vc, vc->vc_top, vc->vc_bottom, 1);
1138 else if (vc->vc_y > 0) {
1140 vc->vc_pos -= vc->vc_size_row;
1142 vc->vc_need_wrap = 0;
1145 static inline void cr(struct vc_data *vc)
1147 vc->vc_pos -= vc->vc_x << 1;
1148 vc->vc_need_wrap = vc->vc_x = 0;
1149 notify_write(vc, '\r');
1152 static inline void bs(struct vc_data *vc)
1157 vc->vc_need_wrap = 0;
1158 notify_write(vc, '\b');
1162 static inline void del(struct vc_data *vc)
1167 static void csi_J(struct vc_data *vc, int vpar)
1170 unsigned short * start;
1173 case 0: /* erase from cursor to end of display */
1174 count = (vc->vc_scr_end - vc->vc_pos) >> 1;
1175 start = (unsigned short *)vc->vc_pos;
1176 if (DO_UPDATE(vc)) {
1177 /* do in two stages */
1178 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1179 vc->vc_cols - vc->vc_x);
1180 vc->vc_sw->con_clear(vc, vc->vc_y + 1, 0,
1181 vc->vc_rows - vc->vc_y - 1,
1185 case 1: /* erase from start to cursor */
1186 count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1;
1187 start = (unsigned short *)vc->vc_origin;
1188 if (DO_UPDATE(vc)) {
1189 /* do in two stages */
1190 vc->vc_sw->con_clear(vc, 0, 0, vc->vc_y,
1192 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1196 case 3: /* erase scroll-back buffer (and whole display) */
1197 scr_memsetw(vc->vc_screenbuf, vc->vc_video_erase_char,
1198 vc->vc_screenbuf_size >> 1);
1200 if (CON_IS_VISIBLE(vc))
1203 case 2: /* erase whole display */
1204 count = vc->vc_cols * vc->vc_rows;
1205 start = (unsigned short *)vc->vc_origin;
1207 vc->vc_sw->con_clear(vc, 0, 0,
1214 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1215 vc->vc_need_wrap = 0;
1218 static void csi_K(struct vc_data *vc, int vpar)
1221 unsigned short * start;
1224 case 0: /* erase from cursor to end of line */
1225 count = vc->vc_cols - vc->vc_x;
1226 start = (unsigned short *)vc->vc_pos;
1228 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1229 vc->vc_cols - vc->vc_x);
1231 case 1: /* erase from start of line to cursor */
1232 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1233 count = vc->vc_x + 1;
1235 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1238 case 2: /* erase whole line */
1239 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1240 count = vc->vc_cols;
1242 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1248 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1249 vc->vc_need_wrap = 0;
1252 static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */
1258 count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar;
1260 scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count);
1262 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count);
1263 vc->vc_need_wrap = 0;
1266 static void default_attr(struct vc_data *vc)
1268 vc->vc_intensity = 1;
1270 vc->vc_underline = 0;
1273 vc->vc_color = vc->vc_def_color;
1276 /* console_lock is held */
1277 static void csi_m(struct vc_data *vc)
1281 for (i = 0; i <= vc->vc_npar; i++)
1282 switch (vc->vc_par[i]) {
1283 case 0: /* all attributes off */
1287 vc->vc_intensity = 2;
1290 vc->vc_intensity = 0;
1296 vc->vc_underline = 1;
1304 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1305 * Select primary font, don't display
1306 * control chars if defined, don't set
1309 vc->vc_translate = set_translate(vc->vc_charset == 0
1311 : vc->vc_G1_charset, vc);
1312 vc->vc_disp_ctrl = 0;
1313 vc->vc_toggle_meta = 0;
1315 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1316 * Select first alternate font, lets
1317 * chars < 32 be displayed as ROM chars.
1319 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1320 vc->vc_disp_ctrl = 1;
1321 vc->vc_toggle_meta = 0;
1323 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1324 * Select second alternate font, toggle
1325 * high bit before displaying as ROM char.
1327 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1328 vc->vc_disp_ctrl = 1;
1329 vc->vc_toggle_meta = 1;
1333 vc->vc_intensity = 1;
1339 vc->vc_underline = 0;
1347 case 38: /* ANSI X3.64-1979 (SCO-ish?)
1348 * Enables underscore, white foreground
1349 * with white underscore (Linux - use
1350 * default foreground).
1352 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1353 vc->vc_underline = 1;
1355 case 39: /* ANSI X3.64-1979 (SCO-ish?)
1356 * Disable underline option.
1357 * Reset colour to default? It did this
1360 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1361 vc->vc_underline = 0;
1364 vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f);
1367 if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37)
1368 vc->vc_color = color_table[vc->vc_par[i] - 30]
1369 | (vc->vc_color & 0xf0);
1370 else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47)
1371 vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4)
1372 | (vc->vc_color & 0x0f);
1378 static void respond_string(const char *p, struct tty_struct *tty)
1381 tty_insert_flip_char(tty, *p, 0);
1384 con_schedule_flip(tty);
1387 static void cursor_report(struct vc_data *vc, struct tty_struct *tty)
1391 sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1);
1392 respond_string(buf, tty);
1395 static inline void status_report(struct tty_struct *tty)
1397 respond_string("\033[0n", tty); /* Terminal ok */
1400 static inline void respond_ID(struct tty_struct * tty)
1402 respond_string(VT102ID, tty);
1405 void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry)
1409 sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx),
1411 respond_string(buf, tty);
1414 /* invoked via ioctl(TIOCLINUX) and through set_selection */
1415 int mouse_reporting(void)
1417 return vc_cons[fg_console].d->vc_report_mouse;
1420 /* console_lock is held */
1421 static void set_mode(struct vc_data *vc, int on_off)
1425 for (i = 0; i <= vc->vc_npar; i++)
1427 switch(vc->vc_par[i]) { /* DEC private modes set/reset */
1428 case 1: /* Cursor keys send ^[Ox/^[[x */
1430 set_kbd(vc, decckm);
1432 clr_kbd(vc, decckm);
1434 case 3: /* 80/132 mode switch unimplemented */
1435 vc->vc_deccolm = on_off;
1437 vc_resize(deccolm ? 132 : 80, vc->vc_rows);
1438 /* this alone does not suffice; some user mode
1439 utility has to change the hardware regs */
1442 case 5: /* Inverted screen on/off */
1443 if (vc->vc_decscnm != on_off) {
1444 vc->vc_decscnm = on_off;
1445 invert_screen(vc, 0, vc->vc_screenbuf_size, 0);
1449 case 6: /* Origin relative/absolute */
1450 vc->vc_decom = on_off;
1453 case 7: /* Autowrap on/off */
1454 vc->vc_decawm = on_off;
1456 case 8: /* Autorepeat on/off */
1458 set_kbd(vc, decarm);
1460 clr_kbd(vc, decarm);
1463 vc->vc_report_mouse = on_off ? 1 : 0;
1465 case 25: /* Cursor on/off */
1466 vc->vc_deccm = on_off;
1469 vc->vc_report_mouse = on_off ? 2 : 0;
1473 switch(vc->vc_par[i]) { /* ANSI modes set/reset */
1474 case 3: /* Monitor (display ctrls) */
1475 vc->vc_disp_ctrl = on_off;
1477 case 4: /* Insert Mode on/off */
1478 vc->vc_decim = on_off;
1480 case 20: /* Lf, Enter == CrLf/Lf */
1490 /* console_lock is held */
1491 static void setterm_command(struct vc_data *vc)
1493 switch(vc->vc_par[0]) {
1494 case 1: /* set color for underline mode */
1495 if (vc->vc_can_do_color &&
1496 vc->vc_par[1] < 16) {
1497 vc->vc_ulcolor = color_table[vc->vc_par[1]];
1498 if (vc->vc_underline)
1502 case 2: /* set color for half intensity mode */
1503 if (vc->vc_can_do_color &&
1504 vc->vc_par[1] < 16) {
1505 vc->vc_halfcolor = color_table[vc->vc_par[1]];
1506 if (vc->vc_intensity == 0)
1510 case 8: /* store colors as defaults */
1511 vc->vc_def_color = vc->vc_attr;
1512 if (vc->vc_hi_font_mask == 0x100)
1513 vc->vc_def_color >>= 1;
1517 case 9: /* set blanking interval */
1518 blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60;
1519 poke_blanked_console();
1521 case 10: /* set bell frequency in Hz */
1522 if (vc->vc_npar >= 1)
1523 vc->vc_bell_pitch = vc->vc_par[1];
1525 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1527 case 11: /* set bell duration in msec */
1528 if (vc->vc_npar >= 1)
1529 vc->vc_bell_duration = (vc->vc_par[1] < 2000) ?
1530 vc->vc_par[1] * HZ / 1000 : 0;
1532 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1534 case 12: /* bring specified console to the front */
1535 if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1))
1536 set_console(vc->vc_par[1] - 1);
1538 case 13: /* unblank the screen */
1539 poke_blanked_console();
1541 case 14: /* set vesa powerdown interval */
1542 vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1544 case 15: /* activate the previous console */
1545 set_console(last_console);
1550 /* console_lock is held */
1551 static void csi_at(struct vc_data *vc, unsigned int nr)
1553 if (nr > vc->vc_cols - vc->vc_x)
1554 nr = vc->vc_cols - vc->vc_x;
1557 insert_char(vc, nr);
1560 /* console_lock is held */
1561 static void csi_L(struct vc_data *vc, unsigned int nr)
1563 if (nr > vc->vc_rows - vc->vc_y)
1564 nr = vc->vc_rows - vc->vc_y;
1567 scrdown(vc, vc->vc_y, vc->vc_bottom, nr);
1568 vc->vc_need_wrap = 0;
1571 /* console_lock is held */
1572 static void csi_P(struct vc_data *vc, unsigned int nr)
1574 if (nr > vc->vc_cols - vc->vc_x)
1575 nr = vc->vc_cols - vc->vc_x;
1578 delete_char(vc, nr);
1581 /* console_lock is held */
1582 static void csi_M(struct vc_data *vc, unsigned int nr)
1584 if (nr > vc->vc_rows - vc->vc_y)
1585 nr = vc->vc_rows - vc->vc_y;
1588 scrup(vc, vc->vc_y, vc->vc_bottom, nr);
1589 vc->vc_need_wrap = 0;
1592 /* console_lock is held (except via vc_init->reset_terminal */
1593 static void save_cur(struct vc_data *vc)
1595 vc->vc_saved_x = vc->vc_x;
1596 vc->vc_saved_y = vc->vc_y;
1597 vc->vc_s_intensity = vc->vc_intensity;
1598 vc->vc_s_italic = vc->vc_italic;
1599 vc->vc_s_underline = vc->vc_underline;
1600 vc->vc_s_blink = vc->vc_blink;
1601 vc->vc_s_reverse = vc->vc_reverse;
1602 vc->vc_s_charset = vc->vc_charset;
1603 vc->vc_s_color = vc->vc_color;
1604 vc->vc_saved_G0 = vc->vc_G0_charset;
1605 vc->vc_saved_G1 = vc->vc_G1_charset;
1608 /* console_lock is held */
1609 static void restore_cur(struct vc_data *vc)
1611 gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y);
1612 vc->vc_intensity = vc->vc_s_intensity;
1613 vc->vc_italic = vc->vc_s_italic;
1614 vc->vc_underline = vc->vc_s_underline;
1615 vc->vc_blink = vc->vc_s_blink;
1616 vc->vc_reverse = vc->vc_s_reverse;
1617 vc->vc_charset = vc->vc_s_charset;
1618 vc->vc_color = vc->vc_s_color;
1619 vc->vc_G0_charset = vc->vc_saved_G0;
1620 vc->vc_G1_charset = vc->vc_saved_G1;
1621 vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc);
1623 vc->vc_need_wrap = 0;
1626 enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey,
1627 EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd,
1630 /* console_lock is held (except via vc_init()) */
1631 static void reset_terminal(struct vc_data *vc, int do_clear)
1634 vc->vc_bottom = vc->vc_rows;
1635 vc->vc_state = ESnormal;
1637 vc->vc_translate = set_translate(LAT1_MAP, vc);
1638 vc->vc_G0_charset = LAT1_MAP;
1639 vc->vc_G1_charset = GRAF_MAP;
1641 vc->vc_need_wrap = 0;
1642 vc->vc_report_mouse = 0;
1643 vc->vc_utf = default_utf8;
1644 vc->vc_utf_count = 0;
1646 vc->vc_disp_ctrl = 0;
1647 vc->vc_toggle_meta = 0;
1652 vc->vc_deccm = global_cursor_default;
1655 set_kbd(vc, decarm);
1656 clr_kbd(vc, decckm);
1657 clr_kbd(vc, kbdapplic);
1659 kbd_table[vc->vc_num].lockstate = 0;
1660 kbd_table[vc->vc_num].slockstate = 0;
1661 kbd_table[vc->vc_num].ledmode = LED_SHOW_FLAGS;
1662 kbd_table[vc->vc_num].ledflagstate = kbd_table[vc->vc_num].default_ledflagstate;
1663 /* do not do set_leds here because this causes an endless tasklet loop
1664 when the keyboard hasn't been initialized yet */
1666 vc->vc_cursor_type = cur_default;
1667 vc->vc_complement_mask = vc->vc_s_complement_mask;
1672 vc->vc_tab_stop[0] = 0x01010100;
1673 vc->vc_tab_stop[1] =
1674 vc->vc_tab_stop[2] =
1675 vc->vc_tab_stop[3] =
1676 vc->vc_tab_stop[4] =
1677 vc->vc_tab_stop[5] =
1678 vc->vc_tab_stop[6] =
1679 vc->vc_tab_stop[7] = 0x01010101;
1681 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1682 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1690 /* console_lock is held */
1691 static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
1694 * Control characters can be used in the _middle_
1695 * of an escape sequence.
1701 if (vc->vc_bell_duration)
1702 kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration);
1708 vc->vc_pos -= (vc->vc_x << 1);
1709 while (vc->vc_x < vc->vc_cols - 1) {
1711 if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31)))
1714 vc->vc_pos += (vc->vc_x << 1);
1715 notify_write(vc, '\t');
1717 case 10: case 11: case 12:
1719 if (!is_kbd(vc, lnm))
1726 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1727 vc->vc_disp_ctrl = 1;
1731 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1732 vc->vc_disp_ctrl = 0;
1735 vc->vc_state = ESnormal;
1738 vc->vc_state = ESesc;
1744 vc->vc_state = ESsquare;
1747 switch(vc->vc_state) {
1749 vc->vc_state = ESnormal;
1752 vc->vc_state = ESsquare;
1755 vc->vc_state = ESnonstd;
1758 vc->vc_state = ESpercent;
1771 vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31));
1783 vc->vc_state = ESsetG0;
1786 vc->vc_state = ESsetG1;
1789 vc->vc_state = EShash;
1792 reset_terminal(vc, 1);
1794 case '>': /* Numeric keypad */
1795 clr_kbd(vc, kbdapplic);
1797 case '=': /* Appl. keypad */
1798 set_kbd(vc, kbdapplic);
1803 if (c=='P') { /* palette escape sequence */
1804 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1805 vc->vc_par[vc->vc_npar] = 0;
1807 vc->vc_state = ESpalette;
1809 } else if (c=='R') { /* reset palette */
1811 vc->vc_state = ESnormal;
1813 vc->vc_state = ESnormal;
1817 vc->vc_par[vc->vc_npar++] = hex_to_bin(c);
1818 if (vc->vc_npar == 7) {
1819 int i = vc->vc_par[0] * 3, j = 1;
1820 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1821 vc->vc_palette[i++] += vc->vc_par[j++];
1822 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1823 vc->vc_palette[i++] += vc->vc_par[j++];
1824 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1825 vc->vc_palette[i] += vc->vc_par[j];
1827 vc->vc_state = ESnormal;
1830 vc->vc_state = ESnormal;
1833 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1834 vc->vc_par[vc->vc_npar] = 0;
1836 vc->vc_state = ESgetpars;
1837 if (c == '[') { /* Function key */
1838 vc->vc_state=ESfunckey;
1841 vc->vc_ques = (c == '?');
1845 if (c == ';' && vc->vc_npar < NPAR - 1) {
1848 } else if (c>='0' && c<='9') {
1849 vc->vc_par[vc->vc_npar] *= 10;
1850 vc->vc_par[vc->vc_npar] += c - '0';
1853 vc->vc_state = ESgotpars;
1855 vc->vc_state = ESnormal;
1866 vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16);
1868 vc->vc_cursor_type = cur_default;
1876 vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1];
1878 vc->vc_complement_mask = vc->vc_s_complement_mask;
1884 if (vc->vc_par[0] == 5)
1886 else if (vc->vc_par[0] == 6)
1887 cursor_report(vc, tty);
1899 gotoxy(vc, vc->vc_par[0], vc->vc_y);
1904 gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]);
1909 gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]);
1914 gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y);
1919 gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y);
1924 gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]);
1929 gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]);
1934 gotoxay(vc, vc->vc_x ,vc->vc_par[0]);
1941 gotoxay(vc, vc->vc_par[1], vc->vc_par[0]);
1944 csi_J(vc, vc->vc_par[0]);
1947 csi_K(vc, vc->vc_par[0]);
1950 csi_L(vc, vc->vc_par[0]);
1953 csi_M(vc, vc->vc_par[0]);
1956 csi_P(vc, vc->vc_par[0]);
1964 vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31));
1965 else if (vc->vc_par[0] == 3) {
1966 vc->vc_tab_stop[0] =
1967 vc->vc_tab_stop[1] =
1968 vc->vc_tab_stop[2] =
1969 vc->vc_tab_stop[3] =
1970 vc->vc_tab_stop[4] =
1971 vc->vc_tab_stop[5] =
1972 vc->vc_tab_stop[6] =
1973 vc->vc_tab_stop[7] = 0;
1979 case 'q': /* DECLL - but only 3 leds */
1980 /* map 0,1,2,3 to 0,1,2,4 */
1981 if (vc->vc_par[0] < 4)
1982 setledstate(kbd_table + vc->vc_num,
1983 (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4);
1989 vc->vc_par[1] = vc->vc_rows;
1990 /* Minimum allowed region is 2 lines */
1991 if (vc->vc_par[0] < vc->vc_par[1] &&
1992 vc->vc_par[1] <= vc->vc_rows) {
1993 vc->vc_top = vc->vc_par[0] - 1;
1994 vc->vc_bottom = vc->vc_par[1];
2005 csi_X(vc, vc->vc_par[0]);
2008 csi_at(vc, vc->vc_par[0]);
2010 case ']': /* setterm functions */
2011 setterm_command(vc);
2016 vc->vc_state = ESnormal;
2018 case '@': /* defined in ISO 2022 */
2021 case 'G': /* prelim official escape code */
2022 case '8': /* retained for compatibility */
2028 vc->vc_state = ESnormal;
2031 vc->vc_state = ESnormal;
2033 /* DEC screen alignment test. kludge :-) */
2034 vc->vc_video_erase_char =
2035 (vc->vc_video_erase_char & 0xff00) | 'E';
2037 vc->vc_video_erase_char =
2038 (vc->vc_video_erase_char & 0xff00) | ' ';
2039 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
2044 vc->vc_G0_charset = GRAF_MAP;
2046 vc->vc_G0_charset = LAT1_MAP;
2048 vc->vc_G0_charset = IBMPC_MAP;
2050 vc->vc_G0_charset = USER_MAP;
2051 if (vc->vc_charset == 0)
2052 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
2053 vc->vc_state = ESnormal;
2057 vc->vc_G1_charset = GRAF_MAP;
2059 vc->vc_G1_charset = LAT1_MAP;
2061 vc->vc_G1_charset = IBMPC_MAP;
2063 vc->vc_G1_charset = USER_MAP;
2064 if (vc->vc_charset == 1)
2065 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
2066 vc->vc_state = ESnormal;
2069 vc->vc_state = ESnormal;
2073 /* is_double_width() is based on the wcwidth() implementation by
2074 * Markus Kuhn -- 2007-05-26 (Unicode 5.0)
2075 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
2082 static int bisearch(uint32_t ucs, const struct interval *table, int max)
2087 if (ucs < table[0].first || ucs > table[max].last)
2089 while (max >= min) {
2090 mid = (min + max) / 2;
2091 if (ucs > table[mid].last)
2093 else if (ucs < table[mid].first)
2101 static int is_double_width(uint32_t ucs)
2103 static const struct interval double_width[] = {
2104 { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E },
2105 { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF },
2106 { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 },
2107 { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD }
2109 return bisearch(ucs, double_width, ARRAY_SIZE(double_width) - 1);
2112 /* acquires console_lock */
2113 static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2115 #ifdef VT_BUF_VRAM_ONLY
2116 #define FLUSH do { } while(0);
2118 #define FLUSH if (draw_x >= 0) { \
2119 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
2124 int c, tc, ok, n = 0, draw_x = -1;
2125 unsigned int currcons;
2126 unsigned long draw_from = 0, draw_to = 0;
2128 unsigned char vc_attr;
2129 struct vt_notifier_param param;
2133 u16 himask, charmask;
2141 vc = tty->driver_data;
2143 printk(KERN_ERR "vt: argh, driver_data is NULL !\n");
2148 currcons = vc->vc_num;
2149 if (!vc_cons_allocated(currcons)) {
2150 /* could this happen? */
2151 pr_warn_once("con_write: tty %d not allocated\n", currcons+1);
2156 himask = vc->vc_hi_font_mask;
2157 charmask = himask ? 0x1ff : 0xff;
2159 /* undraw cursor first */
2165 while (!tty->stopped && count) {
2175 /* Do no translation at all in control states */
2176 if (vc->vc_state != ESnormal) {
2178 } else if (vc->vc_utf && !vc->vc_disp_ctrl) {
2179 /* Combine UTF-8 into Unicode in vc_utf_char.
2180 * vc_utf_count is the number of continuation bytes still
2181 * expected to arrive.
2182 * vc_npar is the number of continuation bytes arrived so
2186 if ((c & 0xc0) == 0x80) {
2187 /* Continuation byte received */
2188 static const uint32_t utf8_length_changes[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff };
2189 if (vc->vc_utf_count) {
2190 vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f);
2192 if (--vc->vc_utf_count) {
2193 /* Still need some bytes */
2196 /* Got a whole character */
2197 c = vc->vc_utf_char;
2198 /* Reject overlong sequences */
2199 if (c <= utf8_length_changes[vc->vc_npar - 1] ||
2200 c > utf8_length_changes[vc->vc_npar])
2203 /* Unexpected continuation byte */
2204 vc->vc_utf_count = 0;
2208 /* Single ASCII byte or first byte of a sequence received */
2209 if (vc->vc_utf_count) {
2210 /* Continuation byte expected */
2212 vc->vc_utf_count = 0;
2214 } else if (c > 0x7f) {
2215 /* First byte of a multibyte sequence received */
2217 if ((c & 0xe0) == 0xc0) {
2218 vc->vc_utf_count = 1;
2219 vc->vc_utf_char = (c & 0x1f);
2220 } else if ((c & 0xf0) == 0xe0) {
2221 vc->vc_utf_count = 2;
2222 vc->vc_utf_char = (c & 0x0f);
2223 } else if ((c & 0xf8) == 0xf0) {
2224 vc->vc_utf_count = 3;
2225 vc->vc_utf_char = (c & 0x07);
2226 } else if ((c & 0xfc) == 0xf8) {
2227 vc->vc_utf_count = 4;
2228 vc->vc_utf_char = (c & 0x03);
2229 } else if ((c & 0xfe) == 0xfc) {
2230 vc->vc_utf_count = 5;
2231 vc->vc_utf_char = (c & 0x01);
2233 /* 254 and 255 are invalid */
2236 if (vc->vc_utf_count) {
2237 /* Still need some bytes */
2241 /* Nothing to do if an ASCII byte was received */
2243 /* End of UTF-8 decoding. */
2244 /* c is the received character, or U+FFFD for invalid sequences. */
2245 /* Replace invalid Unicode code points with U+FFFD too */
2246 if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff)
2249 } else { /* no utf or alternate charset mode */
2250 tc = vc_translate(vc, c);
2254 if (atomic_notifier_call_chain(&vt_notifier_list, VT_PREWRITE,
2255 ¶m) == NOTIFY_STOP)
2258 /* If the original code was a control character we
2259 * only allow a glyph to be displayed if the code is
2260 * not normally used (such as for cursor movement) or
2261 * if the disp_ctrl mode has been explicitly enabled.
2262 * Certain characters (as given by the CTRL_ALWAYS
2263 * bitmap) are always displayed as control characters,
2264 * as the console would be pretty useless without
2265 * them; to display an arbitrary font position use the
2266 * direct-to-font zone in UTF-8 mode.
2268 ok = tc && (c >= 32 ||
2269 !(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 :
2270 vc->vc_utf || ((CTRL_ACTION >> c) & 1)))
2271 && (c != 127 || vc->vc_disp_ctrl)
2274 if (vc->vc_state == ESnormal && ok) {
2275 if (vc->vc_utf && !vc->vc_disp_ctrl) {
2276 if (is_double_width(c))
2279 /* Now try to find out how to display it */
2280 tc = conv_uni_to_pc(vc, tc);
2281 if (tc & ~charmask) {
2282 if (tc == -1 || tc == -2) {
2283 continue; /* nothing to display */
2285 /* Glyph not found */
2286 if ((!(vc->vc_utf && !vc->vc_disp_ctrl) || c < 128) && !(c & ~charmask)) {
2287 /* In legacy mode use the glyph we get by a 1:1 mapping.
2288 This would make absolutely no sense with Unicode in mind,
2289 but do this for ASCII characters since a font may lack
2290 Unicode mapping info and we don't want to end up with
2291 having question marks only. */
2294 /* Display U+FFFD. If it's not found, display an inverse question mark. */
2295 tc = conv_uni_to_pc(vc, 0xfffd);
2298 tc = conv_uni_to_pc(vc, '?');
2299 if (tc < 0) tc = '?';
2305 vc_attr = vc->vc_attr;
2307 /* invert vc_attr */
2308 if (!vc->vc_can_do_color) {
2309 vc_attr = (vc->vc_attr) ^ 0x08;
2310 } else if (vc->vc_hi_font_mask == 0x100) {
2311 vc_attr = ((vc->vc_attr) & 0x11) | (((vc->vc_attr) & 0xe0) >> 4) | (((vc->vc_attr) & 0x0e) << 4);
2313 vc_attr = ((vc->vc_attr) & 0x88) | (((vc->vc_attr) & 0x70) >> 4) | (((vc->vc_attr) & 0x07) << 4);
2319 if (vc->vc_need_wrap || vc->vc_decim)
2321 if (vc->vc_need_wrap) {
2328 ((vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) :
2329 (vc_attr << 8) + tc,
2330 (u16 *) vc->vc_pos);
2331 if (DO_UPDATE(vc) && draw_x < 0) {
2333 draw_from = vc->vc_pos;
2335 if (vc->vc_x == vc->vc_cols - 1) {
2336 vc->vc_need_wrap = vc->vc_decawm;
2337 draw_to = vc->vc_pos + 2;
2340 draw_to = (vc->vc_pos += 2);
2343 if (!--width) break;
2345 tc = conv_uni_to_pc(vc, ' '); /* A space is printed in the second column */
2346 if (tc < 0) tc = ' ';
2348 notify_write(vc, c);
2359 goto rescan_last_byte;
2364 do_con_trol(tty, vc, orig);
2367 console_conditional_schedule();
2375 * This is the console switching callback.
2377 * Doing console switching in a process context allows
2378 * us to do the switches asynchronously (needed when we want
2379 * to switch due to a keyboard interrupt). Synchronization
2380 * with other console code and prevention of re-entrancy is
2381 * ensured with console_lock.
2383 static void console_callback(struct work_struct *ignored)
2387 if (want_console >= 0) {
2388 if (want_console != fg_console &&
2389 vc_cons_allocated(want_console)) {
2390 hide_cursor(vc_cons[fg_console].d);
2391 change_console(vc_cons[want_console].d);
2392 /* we only changed when the console had already
2393 been allocated - a new console is not created
2394 in an interrupt routine */
2398 if (do_poke_blanked_console) { /* do not unblank for a LED change */
2399 do_poke_blanked_console = 0;
2400 poke_blanked_console();
2402 if (scrollback_delta) {
2403 struct vc_data *vc = vc_cons[fg_console].d;
2405 if (vc->vc_mode == KD_TEXT)
2406 vc->vc_sw->con_scrolldelta(vc, scrollback_delta);
2407 scrollback_delta = 0;
2409 if (blank_timer_expired) {
2411 blank_timer_expired = 0;
2413 notify_update(vc_cons[fg_console].d);
2418 int set_console(int nr)
2420 struct vc_data *vc = vc_cons[fg_console].d;
2422 if (!vc_cons_allocated(nr) || vt_dont_switch ||
2423 (vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) {
2426 * Console switch will fail in console_callback() or
2427 * change_console() so there is no point scheduling
2430 * Existing set_console() users don't check the return
2431 * value so this shouldn't break anything
2437 schedule_console_callback();
2442 struct tty_driver *console_driver;
2444 #ifdef CONFIG_VT_CONSOLE
2447 * vt_kmsg_redirect() - Sets/gets the kernel message console
2448 * @new: The new virtual terminal number or -1 if the console should stay
2451 * By default, the kernel messages are always printed on the current virtual
2452 * console. However, the user may modify that default with the
2453 * TIOCL_SETKMSGREDIRECT ioctl call.
2455 * This function sets the kernel message console to be @new. It returns the old
2456 * virtual console number. The virtual terminal number 0 (both as parameter and
2457 * return value) means no redirection (i.e. always printed on the currently
2460 * The parameter -1 means that only the current console is returned, but the
2461 * value is not modified. You may use the macro vt_get_kmsg_redirect() in that
2462 * case to make the code more understandable.
2464 * When the kernel is compiled without CONFIG_VT_CONSOLE, this function ignores
2465 * the parameter and always returns 0.
2467 int vt_kmsg_redirect(int new)
2469 static int kmsg_con;
2472 return xchg(&kmsg_con, new);
2478 * Console on virtual terminal
2480 * The console must be locked when we get here.
2483 static void vt_console_print(struct console *co, const char *b, unsigned count)
2485 struct vc_data *vc = vc_cons[fg_console].d;
2487 static DEFINE_SPINLOCK(printing_lock);
2488 const ushort *start;
2493 /* console busy or not yet initialized */
2496 if (!spin_trylock(&printing_lock))
2499 kmsg_console = vt_get_kmsg_redirect();
2500 if (kmsg_console && vc_cons_allocated(kmsg_console - 1))
2501 vc = vc_cons[kmsg_console - 1].d;
2503 /* read `x' only after setting currcons properly (otherwise
2504 the `x' macro will read the x of the foreground console). */
2507 if (!vc_cons_allocated(fg_console)) {
2509 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2513 if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc))
2516 /* undraw cursor first */
2520 start = (ushort *)vc->vc_pos;
2522 /* Contrived structure to try to emulate original need_wrap behaviour
2523 * Problems caused when we have need_wrap set on '\n' character */
2526 if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) {
2528 if (CON_IS_VISIBLE(vc))
2529 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2531 if (vc->vc_need_wrap)
2535 if (c == 8) { /* backspace */
2537 start = (ushort *)vc->vc_pos;
2544 start = (ushort *)vc->vc_pos;
2546 if (c == 10 || c == 13)
2549 scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos);
2550 notify_write(vc, c);
2552 if (myx == vc->vc_cols - 1) {
2553 vc->vc_need_wrap = 1;
2560 if (CON_IS_VISIBLE(vc))
2561 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2563 if (vc->vc_x == vc->vc_cols) {
2565 vc->vc_need_wrap = 1;
2572 spin_unlock(&printing_lock);
2575 static struct tty_driver *vt_console_device(struct console *c, int *index)
2577 *index = c->index ? c->index-1 : fg_console;
2578 return console_driver;
2581 static struct console vt_console_driver = {
2583 .write = vt_console_print,
2584 .device = vt_console_device,
2585 .unblank = unblank_screen,
2586 .flags = CON_PRINTBUFFER,
2592 * Handling of Linux-specific VC ioctls
2596 * Generally a bit racy with respect to console_lock();.
2598 * There are some functions which don't need it.
2600 * There are some functions which can sleep for arbitrary periods
2601 * (paste_selection) but we don't need the lock there anyway.
2603 * set_selection has locking, and definitely needs it
2606 int tioclinux(struct tty_struct *tty, unsigned long arg)
2609 char __user *p = (char __user *)arg;
2613 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN))
2615 if (get_user(type, p))
2623 ret = set_selection((struct tiocl_selection __user *)(p+1), tty);
2626 case TIOCL_PASTESEL:
2627 ret = paste_selection(tty);
2629 case TIOCL_UNBLANKSCREEN:
2634 case TIOCL_SELLOADLUT:
2635 ret = sel_loadlut(p);
2637 case TIOCL_GETSHIFTSTATE:
2640 * Make it possible to react to Shift+Mousebutton.
2641 * Note that 'shift_state' is an undocumented
2642 * kernel-internal variable; programs not closely
2643 * related to the kernel should not use this.
2646 ret = __put_user(data, p);
2648 case TIOCL_GETMOUSEREPORTING:
2649 data = mouse_reporting();
2650 ret = __put_user(data, p);
2652 case TIOCL_SETVESABLANK:
2653 ret = set_vesa_blanking(p);
2655 case TIOCL_GETKMSGREDIRECT:
2656 data = vt_get_kmsg_redirect();
2657 ret = __put_user(data, p);
2659 case TIOCL_SETKMSGREDIRECT:
2660 if (!capable(CAP_SYS_ADMIN)) {
2663 if (get_user(data, p+1))
2666 vt_kmsg_redirect(data);
2669 case TIOCL_GETFGCONSOLE:
2672 case TIOCL_SCROLLCONSOLE:
2673 if (get_user(lines, (s32 __user *)(p+4))) {
2676 scrollfront(vc_cons[fg_console].d, lines);
2680 case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
2686 case TIOCL_BLANKEDSCREEN:
2687 ret = console_blanked;
2697 * /dev/ttyN handling
2700 static int con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2704 retval = do_con_write(tty, buf, count);
2705 con_flush_chars(tty);
2710 static int con_put_char(struct tty_struct *tty, unsigned char ch)
2713 return 0; /* n_r3964 calls put_char() from interrupt context */
2714 return do_con_write(tty, &ch, 1);
2717 static int con_write_room(struct tty_struct *tty)
2721 return 32768; /* No limit, really; we're not buffering */
2724 static int con_chars_in_buffer(struct tty_struct *tty)
2726 return 0; /* we're not buffering */
2730 * con_throttle and con_unthrottle are only used for
2731 * paste_selection(), which has to stuff in a large number of
2734 static void con_throttle(struct tty_struct *tty)
2738 static void con_unthrottle(struct tty_struct *tty)
2740 struct vc_data *vc = tty->driver_data;
2742 wake_up_interruptible(&vc->paste_wait);
2746 * Turn the Scroll-Lock LED on when the tty is stopped
2748 static void con_stop(struct tty_struct *tty)
2753 console_num = tty->index;
2754 if (!vc_cons_allocated(console_num))
2756 set_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2761 * Turn the Scroll-Lock LED off when the console is started
2763 static void con_start(struct tty_struct *tty)
2768 console_num = tty->index;
2769 if (!vc_cons_allocated(console_num))
2771 clr_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2775 static void con_flush_chars(struct tty_struct *tty)
2779 if (in_interrupt()) /* from flush_to_ldisc */
2782 /* if we race with con_close(), vt may be null */
2784 vc = tty->driver_data;
2791 * Allocate the console screen memory.
2793 static int con_open(struct tty_struct *tty, struct file *filp)
2795 unsigned int currcons = tty->index;
2799 if (tty->driver_data == NULL) {
2800 ret = vc_allocate(currcons);
2802 struct vc_data *vc = vc_cons[currcons].d;
2804 /* Still being freed */
2807 return -ERESTARTSYS;
2809 tty->driver_data = vc;
2812 if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
2813 tty->winsize.ws_row = vc_cons[currcons].d->vc_rows;
2814 tty->winsize.ws_col = vc_cons[currcons].d->vc_cols;
2817 tty->termios->c_iflag |= IUTF8;
2819 tty->termios->c_iflag &= ~IUTF8;
2828 static void con_close(struct tty_struct *tty, struct file *filp)
2830 /* Nothing to do - we defer to shutdown */
2833 static void con_shutdown(struct tty_struct *tty)
2835 struct vc_data *vc = tty->driver_data;
2838 vc->port.tty = NULL;
2843 static int default_italic_color = 2; // green (ASCII)
2844 static int default_underline_color = 3; // cyan (ASCII)
2845 module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR);
2846 module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR);
2848 static void vc_init(struct vc_data *vc, unsigned int rows,
2849 unsigned int cols, int do_clear)
2855 vc->vc_size_row = cols << 1;
2856 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
2859 vc->vc_pos = vc->vc_origin;
2861 for (j=k=0; j<16; j++) {
2862 vc->vc_palette[k++] = default_red[j] ;
2863 vc->vc_palette[k++] = default_grn[j] ;
2864 vc->vc_palette[k++] = default_blu[j] ;
2866 vc->vc_def_color = 0x07; /* white */
2867 vc->vc_ulcolor = default_underline_color;
2868 vc->vc_itcolor = default_italic_color;
2869 vc->vc_halfcolor = 0x08; /* grey */
2870 init_waitqueue_head(&vc->paste_wait);
2871 reset_terminal(vc, do_clear);
2875 * This routine initializes console interrupts, and does nothing
2876 * else. If you want the screen to clear, call tty_write with
2877 * the appropriate escape-sequence.
2880 static int __init con_init(void)
2882 const char *display_desc = NULL;
2884 unsigned int currcons = 0, i;
2889 display_desc = conswitchp->con_startup();
2890 if (!display_desc) {
2896 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2897 struct con_driver *con_driver = ®istered_con_driver[i];
2899 if (con_driver->con == NULL) {
2900 con_driver->con = conswitchp;
2901 con_driver->desc = display_desc;
2902 con_driver->flag = CON_DRIVER_FLAG_INIT;
2903 con_driver->first = 0;
2904 con_driver->last = MAX_NR_CONSOLES - 1;
2909 for (i = 0; i < MAX_NR_CONSOLES; i++)
2910 con_driver_map[i] = conswitchp;
2912 if (blankinterval) {
2913 blank_state = blank_normal_wait;
2914 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
2917 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) {
2918 vc_cons[currcons].d = vc = kzalloc(sizeof(struct vc_data), GFP_NOWAIT);
2919 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
2920 tty_port_init(&vc->port);
2921 visual_init(vc, currcons, 1);
2922 vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_NOWAIT);
2923 vc_init(vc, vc->vc_rows, vc->vc_cols,
2924 currcons || !vc->vc_sw->con_save_screen);
2926 currcons = fg_console = 0;
2927 master_display_fg = vc = vc_cons[currcons].d;
2930 gotoxy(vc, vc->vc_x, vc->vc_y);
2933 pr_info("Console: %s %s %dx%d",
2934 vc->vc_can_do_color ? "colour" : "mono",
2935 display_desc, vc->vc_cols, vc->vc_rows);
2941 #ifdef CONFIG_VT_CONSOLE
2942 register_console(&vt_console_driver);
2946 console_initcall(con_init);
2948 static const struct tty_operations con_ops = {
2952 .write_room = con_write_room,
2953 .put_char = con_put_char,
2954 .flush_chars = con_flush_chars,
2955 .chars_in_buffer = con_chars_in_buffer,
2957 #ifdef CONFIG_COMPAT
2958 .compat_ioctl = vt_compat_ioctl,
2962 .throttle = con_throttle,
2963 .unthrottle = con_unthrottle,
2964 .resize = vt_resize,
2965 .shutdown = con_shutdown
2968 static struct cdev vc0_cdev;
2970 static ssize_t show_tty_active(struct device *dev,
2971 struct device_attribute *attr, char *buf)
2973 return sprintf(buf, "tty%d\n", fg_console + 1);
2975 static DEVICE_ATTR(active, S_IRUGO, show_tty_active, NULL);
2977 int __init vty_init(const struct file_operations *console_fops)
2979 cdev_init(&vc0_cdev, console_fops);
2980 if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) ||
2981 register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0)
2982 panic("Couldn't register /dev/tty0 driver\n");
2983 tty0dev = device_create(tty_class, NULL, MKDEV(TTY_MAJOR, 0), NULL, "tty0");
2984 if (IS_ERR(tty0dev))
2987 WARN_ON(device_create_file(tty0dev, &dev_attr_active) < 0);
2991 console_driver = alloc_tty_driver(MAX_NR_CONSOLES);
2992 if (!console_driver)
2993 panic("Couldn't allocate console driver\n");
2994 console_driver->owner = THIS_MODULE;
2995 console_driver->name = "tty";
2996 console_driver->name_base = 1;
2997 console_driver->major = TTY_MAJOR;
2998 console_driver->minor_start = 1;
2999 console_driver->type = TTY_DRIVER_TYPE_CONSOLE;
3000 console_driver->init_termios = tty_std_termios;
3002 console_driver->init_termios.c_iflag |= IUTF8;
3003 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS;
3004 tty_set_operations(console_driver, &con_ops);
3005 if (tty_register_driver(console_driver))
3006 panic("Couldn't register console driver\n");
3009 #ifdef CONFIG_MDA_CONSOLE
3015 #ifndef VT_SINGLE_DRIVER
3017 static struct class *vtconsole_class;
3019 static int bind_con_driver(const struct consw *csw, int first, int last,
3022 struct module *owner = csw->owner;
3023 const char *desc = NULL;
3024 struct con_driver *con_driver;
3025 int i, j = -1, k = -1, retval = -ENODEV;
3027 if (!try_module_get(owner))
3032 /* check if driver is registered */
3033 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3034 con_driver = ®istered_con_driver[i];
3036 if (con_driver->con == csw) {
3037 desc = con_driver->desc;
3046 if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) {
3048 con_driver->flag |= CON_DRIVER_FLAG_INIT;
3053 module_put(conswitchp->owner);
3055 __module_get(owner);
3059 first = max(first, con_driver->first);
3060 last = min(last, con_driver->last);
3062 for (i = first; i <= last; i++) {
3064 struct vc_data *vc = vc_cons[i].d;
3066 if (con_driver_map[i])
3067 module_put(con_driver_map[i]->owner);
3068 __module_get(owner);
3069 con_driver_map[i] = csw;
3071 if (!vc || !vc->vc_sw)
3076 if (CON_IS_VISIBLE(vc)) {
3081 old_was_color = vc->vc_can_do_color;
3082 vc->vc_sw->con_deinit(vc);
3083 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
3084 visual_init(vc, i, 0);
3088 /* If the console changed between mono <-> color, then
3089 * the attributes in the screenbuf will be wrong. The
3090 * following resets all attributes to something sane.
3092 if (old_was_color != vc->vc_can_do_color)
3093 clear_buffer_attributes(vc);
3096 pr_info("Console: switching ");
3098 printk("consoles %d-%d ", first+1, last+1);
3100 struct vc_data *vc = vc_cons[j].d;
3102 printk("to %s %s %dx%d\n",
3103 vc->vc_can_do_color ? "colour" : "mono",
3104 desc, vc->vc_cols, vc->vc_rows);
3111 printk("to %s\n", desc);
3120 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
3121 static int con_is_graphics(const struct consw *csw, int first, int last)
3125 for (i = first; i <= last; i++) {
3126 struct vc_data *vc = vc_cons[i].d;
3128 if (vc && vc->vc_mode == KD_GRAPHICS) {
3138 * unbind_con_driver - unbind a console driver
3139 * @csw: pointer to console driver to unregister
3140 * @first: first in range of consoles that @csw should be unbound from
3141 * @last: last in range of consoles that @csw should be unbound from
3142 * @deflt: should next bound console driver be default after @csw is unbound?
3144 * To unbind a driver from all possible consoles, pass 0 as @first and
3145 * %MAX_NR_CONSOLES as @last.
3147 * @deflt controls whether the console that ends up replacing @csw should be
3148 * the default console.
3151 * -ENODEV if @csw isn't a registered console driver or can't be unregistered
3154 int unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
3156 struct module *owner = csw->owner;
3157 const struct consw *defcsw = NULL;
3158 struct con_driver *con_driver = NULL, *con_back = NULL;
3159 int i, retval = -ENODEV;
3161 if (!try_module_get(owner))
3166 /* check if driver is registered and if it is unbindable */
3167 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3168 con_driver = ®istered_con_driver[i];
3170 if (con_driver->con == csw &&
3171 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3184 /* check if backup driver exists */
3185 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3186 con_back = ®istered_con_driver[i];
3188 if (con_back->con &&
3189 !(con_back->flag & CON_DRIVER_FLAG_MODULE)) {
3190 defcsw = con_back->con;
3201 if (!con_is_bound(csw)) {
3206 first = max(first, con_driver->first);
3207 last = min(last, con_driver->last);
3209 for (i = first; i <= last; i++) {
3210 if (con_driver_map[i] == csw) {
3211 module_put(csw->owner);
3212 con_driver_map[i] = NULL;
3216 if (!con_is_bound(defcsw)) {
3217 const struct consw *defconsw = conswitchp;
3219 defcsw->con_startup();
3220 con_back->flag |= CON_DRIVER_FLAG_INIT;
3222 * vgacon may change the default driver to point
3223 * to dummycon, we restore it here...
3225 conswitchp = defconsw;
3228 if (!con_is_bound(csw))
3229 con_driver->flag &= ~CON_DRIVER_FLAG_INIT;
3232 /* ignore return value, binding should not fail */
3233 bind_con_driver(defcsw, first, last, deflt);
3239 EXPORT_SYMBOL(unbind_con_driver);
3241 static int vt_bind(struct con_driver *con)
3243 const struct consw *defcsw = NULL, *csw = NULL;
3244 int i, more = 1, first = -1, last = -1, deflt = 0;
3246 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3247 con_is_graphics(con->con, con->first, con->last))
3252 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3253 struct con_driver *con = ®istered_con_driver[i];
3255 if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) {
3267 for (i = con->first; i <= con->last; i++) {
3268 if (con_driver_map[i] == defcsw) {
3273 } else if (first != -1)
3277 if (first == 0 && last == MAX_NR_CONSOLES -1)
3281 bind_con_driver(csw, first, last, deflt);
3292 static int vt_unbind(struct con_driver *con)
3294 const struct consw *csw = NULL;
3295 int i, more = 1, first = -1, last = -1, deflt = 0;
3297 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3298 con_is_graphics(con->con, con->first, con->last))
3306 for (i = con->first; i <= con->last; i++) {
3307 if (con_driver_map[i] == csw) {
3312 } else if (first != -1)
3316 if (first == 0 && last == MAX_NR_CONSOLES -1)
3320 unbind_con_driver(csw, first, last, deflt);
3331 static inline int vt_bind(struct con_driver *con)
3335 static inline int vt_unbind(struct con_driver *con)
3339 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3341 static ssize_t store_bind(struct device *dev, struct device_attribute *attr,
3342 const char *buf, size_t count)
3344 struct con_driver *con = dev_get_drvdata(dev);
3345 int bind = simple_strtoul(buf, NULL, 0);
3355 static ssize_t show_bind(struct device *dev, struct device_attribute *attr,
3358 struct con_driver *con = dev_get_drvdata(dev);
3359 int bind = con_is_bound(con->con);
3361 return snprintf(buf, PAGE_SIZE, "%i\n", bind);
3364 static ssize_t show_name(struct device *dev, struct device_attribute *attr,
3367 struct con_driver *con = dev_get_drvdata(dev);
3369 return snprintf(buf, PAGE_SIZE, "%s %s\n",
3370 (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)",
3375 static struct device_attribute device_attrs[] = {
3376 __ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind),
3377 __ATTR(name, S_IRUGO, show_name, NULL),
3380 static int vtconsole_init_device(struct con_driver *con)
3385 con->flag |= CON_DRIVER_FLAG_ATTR;
3386 dev_set_drvdata(con->dev, con);
3387 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3388 error = device_create_file(con->dev, &device_attrs[i]);
3395 device_remove_file(con->dev, &device_attrs[i]);
3396 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3402 static void vtconsole_deinit_device(struct con_driver *con)
3406 if (con->flag & CON_DRIVER_FLAG_ATTR) {
3407 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3408 device_remove_file(con->dev, &device_attrs[i]);
3409 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3414 * con_is_bound - checks if driver is bound to the console
3415 * @csw: console driver
3417 * RETURNS: zero if unbound, nonzero if bound
3419 * Drivers can call this and if zero, they should release
3420 * all resources allocated on con_startup()
3422 int con_is_bound(const struct consw *csw)
3426 for (i = 0; i < MAX_NR_CONSOLES; i++) {
3427 if (con_driver_map[i] == csw) {
3435 EXPORT_SYMBOL(con_is_bound);
3438 * con_debug_enter - prepare the console for the kernel debugger
3439 * @sw: console driver
3441 * Called when the console is taken over by the kernel debugger, this
3442 * function needs to save the current console state, then put the console
3443 * into a state suitable for the kernel debugger.
3446 * Zero on success, nonzero if a failure occurred when trying to prepare
3447 * the console for the debugger.
3449 int con_debug_enter(struct vc_data *vc)
3453 saved_fg_console = fg_console;
3454 saved_last_console = last_console;
3455 saved_want_console = want_console;
3456 saved_vc_mode = vc->vc_mode;
3457 saved_console_blanked = console_blanked;
3458 vc->vc_mode = KD_TEXT;
3459 console_blanked = 0;
3460 if (vc->vc_sw->con_debug_enter)
3461 ret = vc->vc_sw->con_debug_enter(vc);
3462 #ifdef CONFIG_KGDB_KDB
3463 /* Set the initial LINES variable if it is not already set */
3464 if (vc->vc_rows < 999) {
3467 const char *setargs[3] = {
3472 if (kdbgetintenv(setargs[0], &linecount)) {
3473 snprintf(lns, 4, "%i", vc->vc_rows);
3474 kdb_set(2, setargs);
3477 #endif /* CONFIG_KGDB_KDB */
3480 EXPORT_SYMBOL_GPL(con_debug_enter);
3483 * con_debug_leave - restore console state
3484 * @sw: console driver
3486 * Restore the console state to what it was before the kernel debugger
3490 * Zero on success, nonzero if a failure occurred when trying to restore
3493 int con_debug_leave(void)
3498 fg_console = saved_fg_console;
3499 last_console = saved_last_console;
3500 want_console = saved_want_console;
3501 console_blanked = saved_console_blanked;
3502 vc_cons[fg_console].d->vc_mode = saved_vc_mode;
3504 vc = vc_cons[fg_console].d;
3505 if (vc->vc_sw->con_debug_leave)
3506 ret = vc->vc_sw->con_debug_leave(vc);
3509 EXPORT_SYMBOL_GPL(con_debug_leave);
3512 * register_con_driver - register console driver to console layer
3513 * @csw: console driver
3514 * @first: the first console to take over, minimum value is 0
3515 * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1
3517 * DESCRIPTION: This function registers a console driver which can later
3518 * bind to a range of consoles specified by @first and @last. It will
3519 * also initialize the console driver by calling con_startup().
3521 int register_con_driver(const struct consw *csw, int first, int last)
3523 struct module *owner = csw->owner;
3524 struct con_driver *con_driver;
3528 if (!try_module_get(owner))
3533 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3534 con_driver = ®istered_con_driver[i];
3536 /* already registered */
3537 if (con_driver->con == csw)
3544 desc = csw->con_startup();
3551 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3552 con_driver = ®istered_con_driver[i];
3554 if (con_driver->con == NULL) {
3555 con_driver->con = csw;
3556 con_driver->desc = desc;
3557 con_driver->node = i;
3558 con_driver->flag = CON_DRIVER_FLAG_MODULE |
3559 CON_DRIVER_FLAG_INIT;
3560 con_driver->first = first;
3561 con_driver->last = last;
3570 con_driver->dev = device_create(vtconsole_class, NULL,
3571 MKDEV(0, con_driver->node),
3575 if (IS_ERR(con_driver->dev)) {
3576 printk(KERN_WARNING "Unable to create device for %s; "
3577 "errno = %ld\n", con_driver->desc,
3578 PTR_ERR(con_driver->dev));
3579 con_driver->dev = NULL;
3581 vtconsole_init_device(con_driver);
3589 EXPORT_SYMBOL(register_con_driver);
3592 * unregister_con_driver - unregister console driver from console layer
3593 * @csw: console driver
3595 * DESCRIPTION: All drivers that registers to the console layer must
3596 * call this function upon exit, or if the console driver is in a state
3597 * where it won't be able to handle console services, such as the
3598 * framebuffer console without loaded framebuffer drivers.
3600 * The driver must unbind first prior to unregistration.
3602 int unregister_con_driver(const struct consw *csw)
3604 int i, retval = -ENODEV;
3608 /* cannot unregister a bound driver */
3609 if (con_is_bound(csw))
3612 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3613 struct con_driver *con_driver = ®istered_con_driver[i];
3615 if (con_driver->con == csw &&
3616 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3617 vtconsole_deinit_device(con_driver);
3618 device_destroy(vtconsole_class,
3619 MKDEV(0, con_driver->node));
3620 con_driver->con = NULL;
3621 con_driver->desc = NULL;
3622 con_driver->dev = NULL;
3623 con_driver->node = 0;
3624 con_driver->flag = 0;
3625 con_driver->first = 0;
3626 con_driver->last = 0;
3635 EXPORT_SYMBOL(unregister_con_driver);
3638 * If we support more console drivers, this function is used
3639 * when a driver wants to take over some existing consoles
3640 * and become default driver for newly opened ones.
3642 * take_over_console is basically a register followed by unbind
3644 int take_over_console(const struct consw *csw, int first, int last, int deflt)
3648 err = register_con_driver(csw, first, last);
3649 /* if we get an busy error we still want to bind the console driver
3650 * and return success, as we may have unbound the console driver
3651 Â * but not unregistered it.
3656 bind_con_driver(csw, first, last, deflt);
3662 * give_up_console is a wrapper to unregister_con_driver. It will only
3663 * work if driver is fully unbound.
3665 void give_up_console(const struct consw *csw)
3667 unregister_con_driver(csw);
3670 static int __init vtconsole_class_init(void)
3674 vtconsole_class = class_create(THIS_MODULE, "vtconsole");
3675 if (IS_ERR(vtconsole_class)) {
3676 printk(KERN_WARNING "Unable to create vt console class; "
3677 "errno = %ld\n", PTR_ERR(vtconsole_class));
3678 vtconsole_class = NULL;
3681 /* Add system drivers to sysfs */
3682 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3683 struct con_driver *con = ®istered_con_driver[i];
3685 if (con->con && !con->dev) {
3686 con->dev = device_create(vtconsole_class, NULL,
3687 MKDEV(0, con->node),
3691 if (IS_ERR(con->dev)) {
3692 printk(KERN_WARNING "Unable to create "
3693 "device for %s; errno = %ld\n",
3694 con->desc, PTR_ERR(con->dev));
3697 vtconsole_init_device(con);
3704 postcore_initcall(vtconsole_class_init);
3712 static int set_vesa_blanking(char __user *p)
3716 if (get_user(mode, p + 1))
3719 vesa_blank_mode = (mode < 4) ? mode : 0;
3723 void do_blank_screen(int entering_gfx)
3725 struct vc_data *vc = vc_cons[fg_console].d;
3728 WARN_CONSOLE_UNLOCKED();
3730 if (console_blanked) {
3731 if (blank_state == blank_vesa_wait) {
3732 blank_state = blank_off;
3733 vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0);
3738 /* entering graphics mode? */
3742 vc->vc_sw->con_blank(vc, -1, 1);
3743 console_blanked = fg_console + 1;
3744 blank_state = blank_off;
3749 if (blank_state != blank_normal_wait)
3751 blank_state = blank_off;
3753 /* don't blank graphics */
3754 if (vc->vc_mode != KD_TEXT) {
3755 console_blanked = fg_console + 1;
3760 del_timer_sync(&console_timer);
3761 blank_timer_expired = 0;
3764 /* In case we need to reset origin, blanking hook returns 1 */
3765 i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0);
3766 console_blanked = fg_console + 1;
3770 if (console_blank_hook && console_blank_hook(1))
3773 if (vesa_off_interval && vesa_blank_mode) {
3774 blank_state = blank_vesa_wait;
3775 mod_timer(&console_timer, jiffies + vesa_off_interval);
3777 vt_event_post(VT_EVENT_BLANK, vc->vc_num, vc->vc_num);
3779 EXPORT_SYMBOL(do_blank_screen);
3782 * Called by timer as well as from vt_console_driver
3784 void do_unblank_screen(int leaving_gfx)
3788 /* This should now always be called from a "sane" (read: can schedule)
3789 * context for the sake of the low level drivers, except in the special
3790 * case of oops_in_progress
3792 if (!oops_in_progress)
3795 WARN_CONSOLE_UNLOCKED();
3798 if (!console_blanked)
3800 if (!vc_cons_allocated(fg_console)) {
3802 pr_warning("unblank_screen: tty %d not allocated ??\n",
3806 vc = vc_cons[fg_console].d;
3807 /* Try to unblank in oops case too */
3808 if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc))
3809 return; /* but leave console_blanked != 0 */
3811 if (blankinterval) {
3812 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
3813 blank_state = blank_normal_wait;
3816 console_blanked = 0;
3817 if (vc->vc_sw->con_blank(vc, 0, leaving_gfx) || vt_force_oops_output(vc))
3818 /* Low-level driver cannot restore -> do it ourselves */
3820 if (console_blank_hook)
3821 console_blank_hook(0);
3824 vt_event_post(VT_EVENT_UNBLANK, vc->vc_num, vc->vc_num);
3826 EXPORT_SYMBOL(do_unblank_screen);
3829 * This is called by the outside world to cause a forced unblank, mostly for
3830 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
3831 * call it with 1 as an argument and so force a mode restore... that may kill
3832 * X or at least garbage the screen but would also make the Oops visible...
3834 void unblank_screen(void)
3836 do_unblank_screen(0);
3840 * We defer the timer blanking to work queue so it can take the console mutex
3841 * (console operations can still happen at irq time, but only from printk which
3842 * has the console mutex. Not perfect yet, but better than no locking
3844 static void blank_screen_t(unsigned long dummy)
3846 if (unlikely(!keventd_up())) {
3847 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
3850 blank_timer_expired = 1;
3851 schedule_work(&console_work);
3854 void poke_blanked_console(void)
3856 WARN_CONSOLE_UNLOCKED();
3858 /* Add this so we quickly catch whoever might call us in a non
3859 * safe context. Nowadays, unblank_screen() isn't to be called in
3860 * atomic contexts and is allowed to schedule (with the special case
3861 * of oops_in_progress, but that isn't of any concern for this
3866 /* This isn't perfectly race free, but a race here would be mostly harmless,
3867 * at worse, we'll do a spurrious blank and it's unlikely
3869 del_timer(&console_timer);
3870 blank_timer_expired = 0;
3872 if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS)
3874 if (console_blanked)
3876 else if (blankinterval) {
3877 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
3878 blank_state = blank_normal_wait;
3886 static void set_palette(struct vc_data *vc)
3888 WARN_CONSOLE_UNLOCKED();
3890 if (vc->vc_mode != KD_GRAPHICS)
3891 vc->vc_sw->con_set_palette(vc, color_table);
3894 static int set_get_cmap(unsigned char __user *arg, int set)
3898 WARN_CONSOLE_UNLOCKED();
3900 for (i = 0; i < 16; i++)
3902 get_user(default_red[i], arg++);
3903 get_user(default_grn[i], arg++);
3904 get_user(default_blu[i], arg++);
3906 put_user(default_red[i], arg++);
3907 put_user(default_grn[i], arg++);
3908 put_user(default_blu[i], arg++);
3911 for (i = 0; i < MAX_NR_CONSOLES; i++)
3912 if (vc_cons_allocated(i)) {
3913 for (j = k = 0; j < 16; j++) {
3914 vc_cons[i].d->vc_palette[k++] = default_red[j];
3915 vc_cons[i].d->vc_palette[k++] = default_grn[j];
3916 vc_cons[i].d->vc_palette[k++] = default_blu[j];
3918 set_palette(vc_cons[i].d);
3925 * Load palette into the DAC registers. arg points to a colour
3926 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
3929 int con_set_cmap(unsigned char __user *arg)
3934 rc = set_get_cmap (arg,1);
3940 int con_get_cmap(unsigned char __user *arg)
3945 rc = set_get_cmap (arg,0);
3951 void reset_palette(struct vc_data *vc)
3954 for (j=k=0; j<16; j++) {
3955 vc->vc_palette[k++] = default_red[j];
3956 vc->vc_palette[k++] = default_grn[j];
3957 vc->vc_palette[k++] = default_blu[j];
3965 * Currently we only support fonts up to 32 pixels wide, at a maximum height
3966 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
3967 * depending on width) reserved for each character which is kinda wasty, but
3968 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
3969 * is up to the actual low-level console-driver convert data into its favorite
3970 * format (maybe we should add a `fontoffset' field to the `display'
3971 * structure so we won't have to convert the fontdata all the time.
3975 #define max_font_size 65536
3977 static int con_font_get(struct vc_data *vc, struct console_font_op *op)
3979 struct console_font font;
3983 if (vc->vc_mode != KD_TEXT)
3987 font.data = kmalloc(max_font_size, GFP_KERNEL);
3994 if (vc->vc_sw->con_font_get)
3995 rc = vc->vc_sw->con_font_get(vc, &font);
4003 c = (font.width+7)/8 * 32 * font.charcount;
4005 if (op->data && font.charcount > op->charcount)
4007 if (!(op->flags & KD_FONT_FLAG_OLD)) {
4008 if (font.width > op->width || font.height > op->height)
4011 if (font.width != 8)
4013 else if ((op->height && font.height > op->height) ||
4020 op->height = font.height;
4021 op->width = font.width;
4022 op->charcount = font.charcount;
4024 if (op->data && copy_to_user(op->data, font.data, c))
4032 static int con_font_set(struct vc_data *vc, struct console_font_op *op)
4034 struct console_font font;
4038 if (vc->vc_mode != KD_TEXT)
4042 if (op->charcount > 512)
4044 if (!op->height) { /* Need to guess font height [compat] */
4046 u8 __user *charmap = op->data;
4049 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
4050 so that we can get rid of this soon */
4051 if (!(op->flags & KD_FONT_FLAG_OLD))
4053 for (h = 32; h > 0; h--)
4054 for (i = 0; i < op->charcount; i++) {
4055 if (get_user(tmp, &charmap[32*i+h-1]))
4064 if (op->width <= 0 || op->width > 32 || op->height > 32)
4066 size = (op->width+7)/8 * 32 * op->charcount;
4067 if (size > max_font_size)
4069 font.charcount = op->charcount;
4070 font.height = op->height;
4071 font.width = op->width;
4072 font.data = memdup_user(op->data, size);
4073 if (IS_ERR(font.data))
4074 return PTR_ERR(font.data);
4076 if (vc->vc_sw->con_font_set)
4077 rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
4085 static int con_font_default(struct vc_data *vc, struct console_font_op *op)
4087 struct console_font font = {.width = op->width, .height = op->height};
4088 char name[MAX_FONT_NAME];
4092 if (vc->vc_mode != KD_TEXT)
4097 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0)
4100 name[MAX_FONT_NAME - 1] = 0;
4103 if (vc->vc_sw->con_font_default)
4104 rc = vc->vc_sw->con_font_default(vc, &font, s);
4109 op->width = font.width;
4110 op->height = font.height;
4115 static int con_font_copy(struct vc_data *vc, struct console_font_op *op)
4117 int con = op->height;
4120 if (vc->vc_mode != KD_TEXT)
4124 if (!vc->vc_sw->con_font_copy)
4126 else if (con < 0 || !vc_cons_allocated(con))
4128 else if (con == vc->vc_num) /* nothing to do */
4131 rc = vc->vc_sw->con_font_copy(vc, con);
4136 int con_font_op(struct vc_data *vc, struct console_font_op *op)
4139 case KD_FONT_OP_SET:
4140 return con_font_set(vc, op);
4141 case KD_FONT_OP_GET:
4142 return con_font_get(vc, op);
4143 case KD_FONT_OP_SET_DEFAULT:
4144 return con_font_default(vc, op);
4145 case KD_FONT_OP_COPY:
4146 return con_font_copy(vc, op);
4152 * Interface exported to selection and vcs.
4155 /* used by selection */
4156 u16 screen_glyph(struct vc_data *vc, int offset)
4158 u16 w = scr_readw(screenpos(vc, offset, 1));
4161 if (w & vc->vc_hi_font_mask)
4165 EXPORT_SYMBOL_GPL(screen_glyph);
4167 /* used by vcs - note the word offset */
4168 unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed)
4170 return screenpos(vc, 2 * w_offset, viewed);
4173 void getconsxy(struct vc_data *vc, unsigned char *p)
4179 void putconsxy(struct vc_data *vc, unsigned char *p)
4182 gotoxy(vc, p[0], p[1]);
4186 u16 vcs_scr_readw(struct vc_data *vc, const u16 *org)
4188 if ((unsigned long)org == vc->vc_pos && softcursor_original != -1)
4189 return softcursor_original;
4190 return scr_readw(org);
4193 void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org)
4195 scr_writew(val, org);
4196 if ((unsigned long)org == vc->vc_pos) {
4197 softcursor_original = -1;
4202 void vcs_scr_updated(struct vc_data *vc)
4208 * Visible symbols for modules
4211 EXPORT_SYMBOL(color_table);
4212 EXPORT_SYMBOL(default_red);
4213 EXPORT_SYMBOL(default_grn);
4214 EXPORT_SYMBOL(default_blu);
4215 EXPORT_SYMBOL(update_region);
4216 EXPORT_SYMBOL(redraw_screen);
4217 EXPORT_SYMBOL(vc_resize);
4218 EXPORT_SYMBOL(fg_console);
4219 EXPORT_SYMBOL(console_blank_hook);
4220 EXPORT_SYMBOL(console_blanked);
4221 EXPORT_SYMBOL(vc_cons);
4222 EXPORT_SYMBOL(global_cursor_default);
4223 #ifndef VT_SINGLE_DRIVER
4224 EXPORT_SYMBOL(take_over_console);
4225 EXPORT_SYMBOL(give_up_console);