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, .c = 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);
505 /* used by selection: complement pointer position */
506 void complement_pos(struct vc_data *vc, int offset)
508 static int old_offset = -1;
509 static unsigned short old;
510 static unsigned short oldx, oldy;
512 WARN_CONSOLE_UNLOCKED();
514 if (old_offset != -1 && old_offset >= 0 &&
515 old_offset < vc->vc_screenbuf_size) {
516 scr_writew(old, screenpos(vc, old_offset, 1));
518 vc->vc_sw->con_putc(vc, old, oldy, oldx);
524 if (offset != -1 && offset >= 0 &&
525 offset < vc->vc_screenbuf_size) {
528 p = screenpos(vc, offset, 1);
530 new = old ^ vc->vc_complement_mask;
533 oldx = (offset >> 1) % vc->vc_cols;
534 oldy = (offset >> 1) / vc->vc_cols;
535 vc->vc_sw->con_putc(vc, new, oldy, oldx);
541 static void insert_char(struct vc_data *vc, unsigned int nr)
543 unsigned short *p, *q = (unsigned short *)vc->vc_pos;
545 p = q + vc->vc_cols - nr - vc->vc_x;
547 scr_writew(scr_readw(p), p + nr);
548 scr_memsetw(q, vc->vc_video_erase_char, nr * 2);
549 vc->vc_need_wrap = 0;
551 unsigned short oldattr = vc->vc_attr;
552 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x, vc->vc_y, vc->vc_x + nr, 1,
553 vc->vc_cols - vc->vc_x - nr);
554 vc->vc_attr = vc->vc_video_erase_char >> 8;
556 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y, vc->vc_x + nr);
557 vc->vc_attr = oldattr;
561 static void delete_char(struct vc_data *vc, unsigned int nr)
563 unsigned int i = vc->vc_x;
564 unsigned short *p = (unsigned short *)vc->vc_pos;
566 while (++i <= vc->vc_cols - nr) {
567 scr_writew(scr_readw(p+nr), p);
570 scr_memsetw(p, vc->vc_video_erase_char, nr * 2);
571 vc->vc_need_wrap = 0;
573 unsigned short oldattr = vc->vc_attr;
574 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x + nr, vc->vc_y, vc->vc_x, 1,
575 vc->vc_cols - vc->vc_x - nr);
576 vc->vc_attr = vc->vc_video_erase_char >> 8;
578 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y,
579 vc->vc_cols - 1 - nr);
580 vc->vc_attr = oldattr;
584 static int softcursor_original;
586 static void add_softcursor(struct vc_data *vc)
588 int i = scr_readw((u16 *) vc->vc_pos);
589 u32 type = vc->vc_cursor_type;
591 if (! (type & 0x10)) return;
592 if (softcursor_original != -1) return;
593 softcursor_original = i;
594 i |= ((type >> 8) & 0xff00 );
595 i ^= ((type) & 0xff00 );
596 if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000;
597 if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700;
598 scr_writew(i, (u16 *) vc->vc_pos);
600 vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x);
603 static void hide_softcursor(struct vc_data *vc)
605 if (softcursor_original != -1) {
606 scr_writew(softcursor_original, (u16 *)vc->vc_pos);
608 vc->vc_sw->con_putc(vc, softcursor_original,
610 softcursor_original = -1;
614 static void hide_cursor(struct vc_data *vc)
618 vc->vc_sw->con_cursor(vc, CM_ERASE);
622 static void set_cursor(struct vc_data *vc)
624 if (!IS_FG(vc) || console_blanked ||
625 vc->vc_mode == KD_GRAPHICS)
631 if ((vc->vc_cursor_type & 0x0f) != 1)
632 vc->vc_sw->con_cursor(vc, CM_DRAW);
637 static void set_origin(struct vc_data *vc)
639 WARN_CONSOLE_UNLOCKED();
641 if (!CON_IS_VISIBLE(vc) ||
642 !vc->vc_sw->con_set_origin ||
643 !vc->vc_sw->con_set_origin(vc))
644 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
645 vc->vc_visible_origin = vc->vc_origin;
646 vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size;
647 vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x;
650 static inline void save_screen(struct vc_data *vc)
652 WARN_CONSOLE_UNLOCKED();
654 if (vc->vc_sw->con_save_screen)
655 vc->vc_sw->con_save_screen(vc);
659 * Redrawing of screen
662 void clear_buffer_attributes(struct vc_data *vc)
664 unsigned short *p = (unsigned short *)vc->vc_origin;
665 int count = vc->vc_screenbuf_size / 2;
666 int mask = vc->vc_hi_font_mask | 0xff;
668 for (; count > 0; count--, p++) {
669 scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p);
673 void redraw_screen(struct vc_data *vc, int is_switch)
677 WARN_CONSOLE_UNLOCKED();
681 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
686 struct vc_data *old_vc = vc_cons[fg_console].d;
689 if (!CON_IS_VISIBLE(vc))
691 *vc->vc_display_fg = vc;
692 fg_console = vc->vc_num;
694 if (!CON_IS_VISIBLE(old_vc)) {
699 sysfs_notify(&tty0dev->kobj, NULL, "active");
707 int old_was_color = vc->vc_can_do_color;
710 update = vc->vc_sw->con_switch(vc);
713 * If console changed from mono<->color, the best we can do
714 * is to clear the buffer attributes. As it currently stands,
715 * rebuilding new attributes from the old buffer is not doable
716 * without overly complex code.
718 if (old_was_color != vc->vc_can_do_color) {
720 clear_buffer_attributes(vc);
723 /* Forcibly update if we're panicing */
724 if ((update && vc->vc_mode != KD_GRAPHICS) ||
725 vt_force_oops_output(vc))
726 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
731 compute_shiftstate();
737 * Allocation, freeing and resizing of VTs.
740 int vc_cons_allocated(unsigned int i)
742 return (i < MAX_NR_CONSOLES && vc_cons[i].d);
745 static void visual_init(struct vc_data *vc, int num, int init)
747 /* ++Geert: vc->vc_sw->con_init determines console size */
749 module_put(vc->vc_sw->owner);
750 vc->vc_sw = conswitchp;
751 #ifndef VT_SINGLE_DRIVER
752 if (con_driver_map[num])
753 vc->vc_sw = con_driver_map[num];
755 __module_get(vc->vc_sw->owner);
757 vc->vc_display_fg = &master_display_fg;
758 vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir;
759 vc->vc_uni_pagedir = 0;
760 vc->vc_hi_font_mask = 0;
761 vc->vc_complement_mask = 0;
762 vc->vc_can_do_color = 0;
763 vc->vc_panic_force_write = false;
764 vc->vc_sw->con_init(vc, init);
765 if (!vc->vc_complement_mask)
766 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
767 vc->vc_s_complement_mask = vc->vc_complement_mask;
768 vc->vc_size_row = vc->vc_cols << 1;
769 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
772 int vc_allocate(unsigned int currcons) /* return 0 on success */
774 WARN_CONSOLE_UNLOCKED();
776 if (currcons >= MAX_NR_CONSOLES)
778 if (!vc_cons[currcons].d) {
780 struct vt_notifier_param param;
782 /* prevent users from taking too much memory */
783 if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE))
786 /* due to the granularity of kmalloc, we waste some memory here */
787 /* the alloc is done in two steps, to optimize the common situation
788 of a 25x80 console (structsize=216, screenbuf_size=4000) */
789 /* although the numbers above are not valid since long ago, the
790 point is still up-to-date and the comment still has its value
791 even if only as a historical artifact. --mj, July 1998 */
792 param.vc = vc = kzalloc(sizeof(struct vc_data), GFP_KERNEL);
795 vc_cons[currcons].d = vc;
796 tty_port_init(&vc->port);
797 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
798 visual_init(vc, currcons, 1);
799 if (!*vc->vc_uni_pagedir_loc)
800 con_set_default_unimap(vc);
801 vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL);
802 if (!vc->vc_screenbuf) {
804 vc_cons[currcons].d = NULL;
808 /* If no drivers have overridden us and the user didn't pass a
809 boot option, default to displaying the cursor */
810 if (global_cursor_default == -1)
811 global_cursor_default = 1;
813 vc_init(vc, vc->vc_rows, vc->vc_cols, 1);
814 vcs_make_sysfs(currcons);
815 atomic_notifier_call_chain(&vt_notifier_list, VT_ALLOCATE, ¶m);
820 static inline int resize_screen(struct vc_data *vc, int width, int height,
823 /* Resizes the resolution of the display adapater */
826 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize)
827 err = vc->vc_sw->con_resize(vc, width, height, user);
833 * Change # of rows and columns (0 means unchanged/the size of fg_console)
834 * [this is to be used together with some user program
835 * like resize that changes the hardware videomode]
837 #define VC_RESIZE_MAXCOL (32767)
838 #define VC_RESIZE_MAXROW (32767)
841 * vc_do_resize - resizing method for the tty
842 * @tty: tty being resized
843 * @real_tty: real tty (different to tty if a pty/tty pair)
844 * @vc: virtual console private data
848 * Resize a virtual console, clipping according to the actual constraints.
849 * If the caller passes a tty structure then update the termios winsize
850 * information and perform any necessary signal handling.
852 * Caller must hold the console semaphore. Takes the termios mutex and
853 * ctrl_lock of the tty IFF a tty is passed.
856 static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc,
857 unsigned int cols, unsigned int lines)
859 unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0;
861 unsigned int old_rows, old_row_size;
862 unsigned int new_cols, new_rows, new_row_size, new_screen_size;
864 unsigned short *newscreen;
866 WARN_CONSOLE_UNLOCKED();
871 user = vc->vc_resize_user;
872 vc->vc_resize_user = 0;
874 if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW)
877 new_cols = (cols ? cols : vc->vc_cols);
878 new_rows = (lines ? lines : vc->vc_rows);
879 new_row_size = new_cols << 1;
880 new_screen_size = new_row_size * new_rows;
882 if (new_cols == vc->vc_cols && new_rows == vc->vc_rows)
885 if (new_screen_size > (4 << 20))
887 newscreen = kmalloc(new_screen_size, GFP_USER);
894 old_rows = vc->vc_rows;
895 old_row_size = vc->vc_size_row;
897 err = resize_screen(vc, new_cols, new_rows, user);
903 vc->vc_rows = new_rows;
904 vc->vc_cols = new_cols;
905 vc->vc_size_row = new_row_size;
906 vc->vc_screenbuf_size = new_screen_size;
908 rlth = min(old_row_size, new_row_size);
909 rrem = new_row_size - rlth;
910 old_origin = vc->vc_origin;
911 new_origin = (long) newscreen;
912 new_scr_end = new_origin + new_screen_size;
914 if (vc->vc_y > new_rows) {
915 if (old_rows - vc->vc_y < new_rows) {
917 * Cursor near the bottom, copy contents from the
920 old_origin += (old_rows - new_rows) * old_row_size;
923 * Cursor is in no man's land, copy 1/2 screenful
924 * from the top and bottom of cursor position
926 old_origin += (vc->vc_y - new_rows/2) * old_row_size;
930 end = old_origin + old_row_size * min(old_rows, new_rows);
934 while (old_origin < end) {
935 scr_memcpyw((unsigned short *) new_origin,
936 (unsigned short *) old_origin, rlth);
938 scr_memsetw((void *)(new_origin + rlth),
939 vc->vc_video_erase_char, rrem);
940 old_origin += old_row_size;
941 new_origin += new_row_size;
943 if (new_scr_end > new_origin)
944 scr_memsetw((void *)new_origin, vc->vc_video_erase_char,
945 new_scr_end - new_origin);
946 kfree(vc->vc_screenbuf);
947 vc->vc_screenbuf = newscreen;
948 vc->vc_screenbuf_size = new_screen_size;
951 /* do part of a reset_terminal() */
953 vc->vc_bottom = vc->vc_rows;
954 gotoxy(vc, vc->vc_x, vc->vc_y);
958 /* Rewrite the requested winsize data with the actual
961 memset(&ws, 0, sizeof(ws));
962 ws.ws_row = vc->vc_rows;
963 ws.ws_col = vc->vc_cols;
964 ws.ws_ypixel = vc->vc_scan_lines;
965 tty_do_resize(tty, &ws);
968 if (CON_IS_VISIBLE(vc))
970 vt_event_post(VT_EVENT_RESIZE, vc->vc_num, vc->vc_num);
975 * vc_resize - resize a VT
976 * @vc: virtual console
980 * Resize a virtual console as seen from the console end of things. We
981 * use the common vc_do_resize methods to update the structures. The
982 * caller must hold the console sem to protect console internals and
986 int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int rows)
988 return vc_do_resize(vc->port.tty, vc, cols, rows);
992 * vt_resize - resize a VT
993 * @tty: tty to resize
994 * @ws: winsize attributes
996 * Resize a virtual terminal. This is called by the tty layer as we
997 * register our own handler for resizing. The mutual helper does all
1000 * Takes the console sem and the called methods then take the tty
1001 * termios_mutex and the tty ctrl_lock in that order.
1003 static int vt_resize(struct tty_struct *tty, struct winsize *ws)
1005 struct vc_data *vc = tty->driver_data;
1009 ret = vc_do_resize(tty, vc, ws->ws_col, ws->ws_row);
1014 void vc_deallocate(unsigned int currcons)
1016 WARN_CONSOLE_UNLOCKED();
1018 if (vc_cons_allocated(currcons)) {
1019 struct vc_data *vc = vc_cons[currcons].d;
1020 struct vt_notifier_param param = { .vc = vc };
1022 atomic_notifier_call_chain(&vt_notifier_list, VT_DEALLOCATE, ¶m);
1023 vcs_remove_sysfs(currcons);
1024 vc->vc_sw->con_deinit(vc);
1025 put_pid(vc->vt_pid);
1026 module_put(vc->vc_sw->owner);
1027 kfree(vc->vc_screenbuf);
1028 if (currcons >= MIN_NR_CONSOLES)
1030 vc_cons[currcons].d = NULL;
1038 #define set_kbd(vc, x) set_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1039 #define clr_kbd(vc, x) clr_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1040 #define is_kbd(vc, x) vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1042 #define decarm VC_REPEAT
1043 #define decckm VC_CKMODE
1044 #define kbdapplic VC_APPLIC
1048 * this is what the terminal answers to a ESC-Z or csi0c query.
1050 #define VT100ID "\033[?1;2c"
1051 #define VT102ID "\033[?6c"
1053 unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7,
1054 8,12,10,14, 9,13,11,15 };
1056 /* the default colour table, for VGA+ colour systems */
1057 int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
1058 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
1059 int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
1060 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
1061 int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
1062 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
1064 module_param_array(default_red, int, NULL, S_IRUGO | S_IWUSR);
1065 module_param_array(default_grn, int, NULL, S_IRUGO | S_IWUSR);
1066 module_param_array(default_blu, int, NULL, S_IRUGO | S_IWUSR);
1069 * gotoxy() must verify all boundaries, because the arguments
1070 * might also be negative. If the given position is out of
1071 * bounds, the cursor is placed at the nearest margin.
1073 static void gotoxy(struct vc_data *vc, int new_x, int new_y)
1080 if (new_x >= vc->vc_cols)
1081 vc->vc_x = vc->vc_cols - 1;
1088 max_y = vc->vc_bottom;
1091 max_y = vc->vc_rows;
1095 else if (new_y >= max_y)
1096 vc->vc_y = max_y - 1;
1099 vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1);
1100 vc->vc_need_wrap = 0;
1103 /* for absolute user moves, when decom is set */
1104 static void gotoxay(struct vc_data *vc, int new_x, int new_y)
1106 gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y);
1109 void scrollback(struct vc_data *vc, int lines)
1112 lines = vc->vc_rows / 2;
1113 scrolldelta(-lines);
1116 void scrollfront(struct vc_data *vc, int lines)
1119 lines = vc->vc_rows / 2;
1123 static void lf(struct vc_data *vc)
1125 /* don't scroll if above bottom of scrolling region, or
1126 * if below scrolling region
1128 if (vc->vc_y + 1 == vc->vc_bottom)
1129 scrup(vc, vc->vc_top, vc->vc_bottom, 1);
1130 else if (vc->vc_y < vc->vc_rows - 1) {
1132 vc->vc_pos += vc->vc_size_row;
1134 vc->vc_need_wrap = 0;
1135 notify_write(vc, '\n');
1138 static void ri(struct vc_data *vc)
1140 /* don't scroll if below top of scrolling region, or
1141 * if above scrolling region
1143 if (vc->vc_y == vc->vc_top)
1144 scrdown(vc, vc->vc_top, vc->vc_bottom, 1);
1145 else if (vc->vc_y > 0) {
1147 vc->vc_pos -= vc->vc_size_row;
1149 vc->vc_need_wrap = 0;
1152 static inline void cr(struct vc_data *vc)
1154 vc->vc_pos -= vc->vc_x << 1;
1155 vc->vc_need_wrap = vc->vc_x = 0;
1156 notify_write(vc, '\r');
1159 static inline void bs(struct vc_data *vc)
1164 vc->vc_need_wrap = 0;
1165 notify_write(vc, '\b');
1169 static inline void del(struct vc_data *vc)
1174 static void csi_J(struct vc_data *vc, int vpar)
1177 unsigned short * start;
1180 case 0: /* erase from cursor to end of display */
1181 count = (vc->vc_scr_end - vc->vc_pos) >> 1;
1182 start = (unsigned short *)vc->vc_pos;
1183 if (DO_UPDATE(vc)) {
1184 /* do in two stages */
1185 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1186 vc->vc_cols - vc->vc_x);
1187 vc->vc_sw->con_clear(vc, vc->vc_y + 1, 0,
1188 vc->vc_rows - vc->vc_y - 1,
1192 case 1: /* erase from start to cursor */
1193 count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1;
1194 start = (unsigned short *)vc->vc_origin;
1195 if (DO_UPDATE(vc)) {
1196 /* do in two stages */
1197 vc->vc_sw->con_clear(vc, 0, 0, vc->vc_y,
1199 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1203 case 3: /* erase scroll-back buffer (and whole display) */
1204 scr_memsetw(vc->vc_screenbuf, vc->vc_video_erase_char,
1205 vc->vc_screenbuf_size);
1207 if (CON_IS_VISIBLE(vc))
1210 case 2: /* erase whole display */
1211 count = vc->vc_cols * vc->vc_rows;
1212 start = (unsigned short *)vc->vc_origin;
1214 vc->vc_sw->con_clear(vc, 0, 0,
1221 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1222 vc->vc_need_wrap = 0;
1225 static void csi_K(struct vc_data *vc, int vpar)
1228 unsigned short * start;
1231 case 0: /* erase from cursor to end of line */
1232 count = vc->vc_cols - vc->vc_x;
1233 start = (unsigned short *)vc->vc_pos;
1235 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1236 vc->vc_cols - vc->vc_x);
1238 case 1: /* erase from start of line to cursor */
1239 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1240 count = vc->vc_x + 1;
1242 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1245 case 2: /* erase whole line */
1246 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1247 count = vc->vc_cols;
1249 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1255 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1256 vc->vc_need_wrap = 0;
1259 static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */
1265 count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar;
1267 scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count);
1269 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count);
1270 vc->vc_need_wrap = 0;
1273 static void default_attr(struct vc_data *vc)
1275 vc->vc_intensity = 1;
1277 vc->vc_underline = 0;
1280 vc->vc_color = vc->vc_def_color;
1283 /* console_lock is held */
1284 static void csi_m(struct vc_data *vc)
1288 for (i = 0; i <= vc->vc_npar; i++)
1289 switch (vc->vc_par[i]) {
1290 case 0: /* all attributes off */
1294 vc->vc_intensity = 2;
1297 vc->vc_intensity = 0;
1303 vc->vc_underline = 1;
1311 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1312 * Select primary font, don't display
1313 * control chars if defined, don't set
1316 vc->vc_translate = set_translate(vc->vc_charset == 0
1318 : vc->vc_G1_charset, vc);
1319 vc->vc_disp_ctrl = 0;
1320 vc->vc_toggle_meta = 0;
1322 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1323 * Select first alternate font, lets
1324 * chars < 32 be displayed as ROM chars.
1326 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1327 vc->vc_disp_ctrl = 1;
1328 vc->vc_toggle_meta = 0;
1330 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1331 * Select second alternate font, toggle
1332 * high bit before displaying as ROM char.
1334 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1335 vc->vc_disp_ctrl = 1;
1336 vc->vc_toggle_meta = 1;
1340 vc->vc_intensity = 1;
1346 vc->vc_underline = 0;
1354 case 38: /* ANSI X3.64-1979 (SCO-ish?)
1355 * Enables underscore, white foreground
1356 * with white underscore (Linux - use
1357 * default foreground).
1359 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1360 vc->vc_underline = 1;
1362 case 39: /* ANSI X3.64-1979 (SCO-ish?)
1363 * Disable underline option.
1364 * Reset colour to default? It did this
1367 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1368 vc->vc_underline = 0;
1371 vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f);
1374 if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37)
1375 vc->vc_color = color_table[vc->vc_par[i] - 30]
1376 | (vc->vc_color & 0xf0);
1377 else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47)
1378 vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4)
1379 | (vc->vc_color & 0x0f);
1385 static void respond_string(const char *p, struct tty_struct *tty)
1388 tty_insert_flip_char(tty, *p, 0);
1391 con_schedule_flip(tty);
1394 static void cursor_report(struct vc_data *vc, struct tty_struct *tty)
1398 sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1);
1399 respond_string(buf, tty);
1402 static inline void status_report(struct tty_struct *tty)
1404 respond_string("\033[0n", tty); /* Terminal ok */
1407 static inline void respond_ID(struct tty_struct * tty)
1409 respond_string(VT102ID, tty);
1412 void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry)
1416 sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx),
1418 respond_string(buf, tty);
1421 /* invoked via ioctl(TIOCLINUX) and through set_selection */
1422 int mouse_reporting(void)
1424 return vc_cons[fg_console].d->vc_report_mouse;
1427 /* console_lock is held */
1428 static void set_mode(struct vc_data *vc, int on_off)
1432 for (i = 0; i <= vc->vc_npar; i++)
1434 switch(vc->vc_par[i]) { /* DEC private modes set/reset */
1435 case 1: /* Cursor keys send ^[Ox/^[[x */
1437 set_kbd(vc, decckm);
1439 clr_kbd(vc, decckm);
1441 case 3: /* 80/132 mode switch unimplemented */
1442 vc->vc_deccolm = on_off;
1444 vc_resize(deccolm ? 132 : 80, vc->vc_rows);
1445 /* this alone does not suffice; some user mode
1446 utility has to change the hardware regs */
1449 case 5: /* Inverted screen on/off */
1450 if (vc->vc_decscnm != on_off) {
1451 vc->vc_decscnm = on_off;
1452 invert_screen(vc, 0, vc->vc_screenbuf_size, 0);
1456 case 6: /* Origin relative/absolute */
1457 vc->vc_decom = on_off;
1460 case 7: /* Autowrap on/off */
1461 vc->vc_decawm = on_off;
1463 case 8: /* Autorepeat on/off */
1465 set_kbd(vc, decarm);
1467 clr_kbd(vc, decarm);
1470 vc->vc_report_mouse = on_off ? 1 : 0;
1472 case 25: /* Cursor on/off */
1473 vc->vc_deccm = on_off;
1476 vc->vc_report_mouse = on_off ? 2 : 0;
1480 switch(vc->vc_par[i]) { /* ANSI modes set/reset */
1481 case 3: /* Monitor (display ctrls) */
1482 vc->vc_disp_ctrl = on_off;
1484 case 4: /* Insert Mode on/off */
1485 vc->vc_decim = on_off;
1487 case 20: /* Lf, Enter == CrLf/Lf */
1497 /* console_lock is held */
1498 static void setterm_command(struct vc_data *vc)
1500 switch(vc->vc_par[0]) {
1501 case 1: /* set color for underline mode */
1502 if (vc->vc_can_do_color &&
1503 vc->vc_par[1] < 16) {
1504 vc->vc_ulcolor = color_table[vc->vc_par[1]];
1505 if (vc->vc_underline)
1509 case 2: /* set color for half intensity mode */
1510 if (vc->vc_can_do_color &&
1511 vc->vc_par[1] < 16) {
1512 vc->vc_halfcolor = color_table[vc->vc_par[1]];
1513 if (vc->vc_intensity == 0)
1517 case 8: /* store colors as defaults */
1518 vc->vc_def_color = vc->vc_attr;
1519 if (vc->vc_hi_font_mask == 0x100)
1520 vc->vc_def_color >>= 1;
1524 case 9: /* set blanking interval */
1525 blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60;
1526 poke_blanked_console();
1528 case 10: /* set bell frequency in Hz */
1529 if (vc->vc_npar >= 1)
1530 vc->vc_bell_pitch = vc->vc_par[1];
1532 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1534 case 11: /* set bell duration in msec */
1535 if (vc->vc_npar >= 1)
1536 vc->vc_bell_duration = (vc->vc_par[1] < 2000) ?
1537 vc->vc_par[1] * HZ / 1000 : 0;
1539 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1541 case 12: /* bring specified console to the front */
1542 if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1))
1543 set_console(vc->vc_par[1] - 1);
1545 case 13: /* unblank the screen */
1546 poke_blanked_console();
1548 case 14: /* set vesa powerdown interval */
1549 vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1551 case 15: /* activate the previous console */
1552 set_console(last_console);
1557 /* console_lock is held */
1558 static void csi_at(struct vc_data *vc, unsigned int nr)
1560 if (nr > vc->vc_cols - vc->vc_x)
1561 nr = vc->vc_cols - vc->vc_x;
1564 insert_char(vc, nr);
1567 /* console_lock is held */
1568 static void csi_L(struct vc_data *vc, unsigned int nr)
1570 if (nr > vc->vc_rows - vc->vc_y)
1571 nr = vc->vc_rows - vc->vc_y;
1574 scrdown(vc, vc->vc_y, vc->vc_bottom, nr);
1575 vc->vc_need_wrap = 0;
1578 /* console_lock is held */
1579 static void csi_P(struct vc_data *vc, unsigned int nr)
1581 if (nr > vc->vc_cols - vc->vc_x)
1582 nr = vc->vc_cols - vc->vc_x;
1585 delete_char(vc, nr);
1588 /* console_lock is held */
1589 static void csi_M(struct vc_data *vc, unsigned int nr)
1591 if (nr > vc->vc_rows - vc->vc_y)
1592 nr = vc->vc_rows - vc->vc_y;
1595 scrup(vc, vc->vc_y, vc->vc_bottom, nr);
1596 vc->vc_need_wrap = 0;
1599 /* console_lock is held (except via vc_init->reset_terminal */
1600 static void save_cur(struct vc_data *vc)
1602 vc->vc_saved_x = vc->vc_x;
1603 vc->vc_saved_y = vc->vc_y;
1604 vc->vc_s_intensity = vc->vc_intensity;
1605 vc->vc_s_italic = vc->vc_italic;
1606 vc->vc_s_underline = vc->vc_underline;
1607 vc->vc_s_blink = vc->vc_blink;
1608 vc->vc_s_reverse = vc->vc_reverse;
1609 vc->vc_s_charset = vc->vc_charset;
1610 vc->vc_s_color = vc->vc_color;
1611 vc->vc_saved_G0 = vc->vc_G0_charset;
1612 vc->vc_saved_G1 = vc->vc_G1_charset;
1615 /* console_lock is held */
1616 static void restore_cur(struct vc_data *vc)
1618 gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y);
1619 vc->vc_intensity = vc->vc_s_intensity;
1620 vc->vc_italic = vc->vc_s_italic;
1621 vc->vc_underline = vc->vc_s_underline;
1622 vc->vc_blink = vc->vc_s_blink;
1623 vc->vc_reverse = vc->vc_s_reverse;
1624 vc->vc_charset = vc->vc_s_charset;
1625 vc->vc_color = vc->vc_s_color;
1626 vc->vc_G0_charset = vc->vc_saved_G0;
1627 vc->vc_G1_charset = vc->vc_saved_G1;
1628 vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc);
1630 vc->vc_need_wrap = 0;
1633 enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey,
1634 EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd,
1637 /* console_lock is held (except via vc_init()) */
1638 static void reset_terminal(struct vc_data *vc, int do_clear)
1641 vc->vc_bottom = vc->vc_rows;
1642 vc->vc_state = ESnormal;
1644 vc->vc_translate = set_translate(LAT1_MAP, vc);
1645 vc->vc_G0_charset = LAT1_MAP;
1646 vc->vc_G1_charset = GRAF_MAP;
1648 vc->vc_need_wrap = 0;
1649 vc->vc_report_mouse = 0;
1650 vc->vc_utf = default_utf8;
1651 vc->vc_utf_count = 0;
1653 vc->vc_disp_ctrl = 0;
1654 vc->vc_toggle_meta = 0;
1659 vc->vc_deccm = global_cursor_default;
1662 set_kbd(vc, decarm);
1663 clr_kbd(vc, decckm);
1664 clr_kbd(vc, kbdapplic);
1666 kbd_table[vc->vc_num].lockstate = 0;
1667 kbd_table[vc->vc_num].slockstate = 0;
1668 kbd_table[vc->vc_num].ledmode = LED_SHOW_FLAGS;
1669 kbd_table[vc->vc_num].ledflagstate = kbd_table[vc->vc_num].default_ledflagstate;
1670 /* do not do set_leds here because this causes an endless tasklet loop
1671 when the keyboard hasn't been initialized yet */
1673 vc->vc_cursor_type = cur_default;
1674 vc->vc_complement_mask = vc->vc_s_complement_mask;
1679 vc->vc_tab_stop[0] = 0x01010100;
1680 vc->vc_tab_stop[1] =
1681 vc->vc_tab_stop[2] =
1682 vc->vc_tab_stop[3] =
1683 vc->vc_tab_stop[4] =
1684 vc->vc_tab_stop[5] =
1685 vc->vc_tab_stop[6] =
1686 vc->vc_tab_stop[7] = 0x01010101;
1688 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1689 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1697 /* console_lock is held */
1698 static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
1701 * Control characters can be used in the _middle_
1702 * of an escape sequence.
1708 if (vc->vc_bell_duration)
1709 kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration);
1715 vc->vc_pos -= (vc->vc_x << 1);
1716 while (vc->vc_x < vc->vc_cols - 1) {
1718 if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31)))
1721 vc->vc_pos += (vc->vc_x << 1);
1722 notify_write(vc, '\t');
1724 case 10: case 11: case 12:
1726 if (!is_kbd(vc, lnm))
1733 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1734 vc->vc_disp_ctrl = 1;
1738 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1739 vc->vc_disp_ctrl = 0;
1742 vc->vc_state = ESnormal;
1745 vc->vc_state = ESesc;
1751 vc->vc_state = ESsquare;
1754 switch(vc->vc_state) {
1756 vc->vc_state = ESnormal;
1759 vc->vc_state = ESsquare;
1762 vc->vc_state = ESnonstd;
1765 vc->vc_state = ESpercent;
1778 vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31));
1790 vc->vc_state = ESsetG0;
1793 vc->vc_state = ESsetG1;
1796 vc->vc_state = EShash;
1799 reset_terminal(vc, 1);
1801 case '>': /* Numeric keypad */
1802 clr_kbd(vc, kbdapplic);
1804 case '=': /* Appl. keypad */
1805 set_kbd(vc, kbdapplic);
1810 if (c=='P') { /* palette escape sequence */
1811 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1812 vc->vc_par[vc->vc_npar] = 0;
1814 vc->vc_state = ESpalette;
1816 } else if (c=='R') { /* reset palette */
1818 vc->vc_state = ESnormal;
1820 vc->vc_state = ESnormal;
1824 vc->vc_par[vc->vc_npar++] = hex_to_bin(c);
1825 if (vc->vc_npar == 7) {
1826 int i = vc->vc_par[0] * 3, j = 1;
1827 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1828 vc->vc_palette[i++] += vc->vc_par[j++];
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];
1834 vc->vc_state = ESnormal;
1837 vc->vc_state = ESnormal;
1840 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1841 vc->vc_par[vc->vc_npar] = 0;
1843 vc->vc_state = ESgetpars;
1844 if (c == '[') { /* Function key */
1845 vc->vc_state=ESfunckey;
1848 vc->vc_ques = (c == '?');
1852 if (c == ';' && vc->vc_npar < NPAR - 1) {
1855 } else if (c>='0' && c<='9') {
1856 vc->vc_par[vc->vc_npar] *= 10;
1857 vc->vc_par[vc->vc_npar] += c - '0';
1860 vc->vc_state = ESgotpars;
1862 vc->vc_state = ESnormal;
1873 vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16);
1875 vc->vc_cursor_type = cur_default;
1883 vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1];
1885 vc->vc_complement_mask = vc->vc_s_complement_mask;
1891 if (vc->vc_par[0] == 5)
1893 else if (vc->vc_par[0] == 6)
1894 cursor_report(vc, tty);
1906 gotoxy(vc, vc->vc_par[0], vc->vc_y);
1911 gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]);
1916 gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]);
1921 gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y);
1926 gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y);
1931 gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]);
1936 gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]);
1941 gotoxay(vc, vc->vc_x ,vc->vc_par[0]);
1948 gotoxay(vc, vc->vc_par[1], vc->vc_par[0]);
1951 csi_J(vc, vc->vc_par[0]);
1954 csi_K(vc, vc->vc_par[0]);
1957 csi_L(vc, vc->vc_par[0]);
1960 csi_M(vc, vc->vc_par[0]);
1963 csi_P(vc, vc->vc_par[0]);
1971 vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31));
1972 else if (vc->vc_par[0] == 3) {
1973 vc->vc_tab_stop[0] =
1974 vc->vc_tab_stop[1] =
1975 vc->vc_tab_stop[2] =
1976 vc->vc_tab_stop[3] =
1977 vc->vc_tab_stop[4] =
1978 vc->vc_tab_stop[5] =
1979 vc->vc_tab_stop[6] =
1980 vc->vc_tab_stop[7] = 0;
1986 case 'q': /* DECLL - but only 3 leds */
1987 /* map 0,1,2,3 to 0,1,2,4 */
1988 if (vc->vc_par[0] < 4)
1989 setledstate(kbd_table + vc->vc_num,
1990 (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4);
1996 vc->vc_par[1] = vc->vc_rows;
1997 /* Minimum allowed region is 2 lines */
1998 if (vc->vc_par[0] < vc->vc_par[1] &&
1999 vc->vc_par[1] <= vc->vc_rows) {
2000 vc->vc_top = vc->vc_par[0] - 1;
2001 vc->vc_bottom = vc->vc_par[1];
2012 csi_X(vc, vc->vc_par[0]);
2015 csi_at(vc, vc->vc_par[0]);
2017 case ']': /* setterm functions */
2018 setterm_command(vc);
2023 vc->vc_state = ESnormal;
2025 case '@': /* defined in ISO 2022 */
2028 case 'G': /* prelim official escape code */
2029 case '8': /* retained for compatibility */
2035 vc->vc_state = ESnormal;
2038 vc->vc_state = ESnormal;
2040 /* DEC screen alignment test. kludge :-) */
2041 vc->vc_video_erase_char =
2042 (vc->vc_video_erase_char & 0xff00) | 'E';
2044 vc->vc_video_erase_char =
2045 (vc->vc_video_erase_char & 0xff00) | ' ';
2046 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
2051 vc->vc_G0_charset = GRAF_MAP;
2053 vc->vc_G0_charset = LAT1_MAP;
2055 vc->vc_G0_charset = IBMPC_MAP;
2057 vc->vc_G0_charset = USER_MAP;
2058 if (vc->vc_charset == 0)
2059 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
2060 vc->vc_state = ESnormal;
2064 vc->vc_G1_charset = GRAF_MAP;
2066 vc->vc_G1_charset = LAT1_MAP;
2068 vc->vc_G1_charset = IBMPC_MAP;
2070 vc->vc_G1_charset = USER_MAP;
2071 if (vc->vc_charset == 1)
2072 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
2073 vc->vc_state = ESnormal;
2076 vc->vc_state = ESnormal;
2080 /* is_double_width() is based on the wcwidth() implementation by
2081 * Markus Kuhn -- 2007-05-26 (Unicode 5.0)
2082 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
2089 static int bisearch(uint32_t ucs, const struct interval *table, int max)
2094 if (ucs < table[0].first || ucs > table[max].last)
2096 while (max >= min) {
2097 mid = (min + max) / 2;
2098 if (ucs > table[mid].last)
2100 else if (ucs < table[mid].first)
2108 static int is_double_width(uint32_t ucs)
2110 static const struct interval double_width[] = {
2111 { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E },
2112 { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF },
2113 { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 },
2114 { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD }
2116 return bisearch(ucs, double_width, ARRAY_SIZE(double_width) - 1);
2119 /* acquires console_lock */
2120 static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2122 #ifdef VT_BUF_VRAM_ONLY
2123 #define FLUSH do { } while(0);
2125 #define FLUSH if (draw_x >= 0) { \
2126 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
2131 int c, tc, ok, n = 0, draw_x = -1;
2132 unsigned int currcons;
2133 unsigned long draw_from = 0, draw_to = 0;
2135 unsigned char vc_attr;
2136 struct vt_notifier_param param;
2140 u16 himask, charmask;
2148 vc = tty->driver_data;
2150 printk(KERN_ERR "vt: argh, driver_data is NULL !\n");
2155 currcons = vc->vc_num;
2156 if (!vc_cons_allocated(currcons)) {
2157 /* could this happen? */
2158 pr_warn_once("con_write: tty %d not allocated\n", currcons+1);
2163 himask = vc->vc_hi_font_mask;
2164 charmask = himask ? 0x1ff : 0xff;
2166 /* undraw cursor first */
2172 while (!tty->stopped && count) {
2182 /* Do no translation at all in control states */
2183 if (vc->vc_state != ESnormal) {
2185 } else if (vc->vc_utf && !vc->vc_disp_ctrl) {
2186 /* Combine UTF-8 into Unicode in vc_utf_char.
2187 * vc_utf_count is the number of continuation bytes still
2188 * expected to arrive.
2189 * vc_npar is the number of continuation bytes arrived so
2193 if ((c & 0xc0) == 0x80) {
2194 /* Continuation byte received */
2195 static const uint32_t utf8_length_changes[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff };
2196 if (vc->vc_utf_count) {
2197 vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f);
2199 if (--vc->vc_utf_count) {
2200 /* Still need some bytes */
2203 /* Got a whole character */
2204 c = vc->vc_utf_char;
2205 /* Reject overlong sequences */
2206 if (c <= utf8_length_changes[vc->vc_npar - 1] ||
2207 c > utf8_length_changes[vc->vc_npar])
2210 /* Unexpected continuation byte */
2211 vc->vc_utf_count = 0;
2215 /* Single ASCII byte or first byte of a sequence received */
2216 if (vc->vc_utf_count) {
2217 /* Continuation byte expected */
2219 vc->vc_utf_count = 0;
2221 } else if (c > 0x7f) {
2222 /* First byte of a multibyte sequence received */
2224 if ((c & 0xe0) == 0xc0) {
2225 vc->vc_utf_count = 1;
2226 vc->vc_utf_char = (c & 0x1f);
2227 } else if ((c & 0xf0) == 0xe0) {
2228 vc->vc_utf_count = 2;
2229 vc->vc_utf_char = (c & 0x0f);
2230 } else if ((c & 0xf8) == 0xf0) {
2231 vc->vc_utf_count = 3;
2232 vc->vc_utf_char = (c & 0x07);
2233 } else if ((c & 0xfc) == 0xf8) {
2234 vc->vc_utf_count = 4;
2235 vc->vc_utf_char = (c & 0x03);
2236 } else if ((c & 0xfe) == 0xfc) {
2237 vc->vc_utf_count = 5;
2238 vc->vc_utf_char = (c & 0x01);
2240 /* 254 and 255 are invalid */
2243 if (vc->vc_utf_count) {
2244 /* Still need some bytes */
2248 /* Nothing to do if an ASCII byte was received */
2250 /* End of UTF-8 decoding. */
2251 /* c is the received character, or U+FFFD for invalid sequences. */
2252 /* Replace invalid Unicode code points with U+FFFD too */
2253 if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff)
2256 } else { /* no utf or alternate charset mode */
2257 tc = vc_translate(vc, c);
2261 if (atomic_notifier_call_chain(&vt_notifier_list, VT_PREWRITE,
2262 ¶m) == NOTIFY_STOP)
2265 /* If the original code was a control character we
2266 * only allow a glyph to be displayed if the code is
2267 * not normally used (such as for cursor movement) or
2268 * if the disp_ctrl mode has been explicitly enabled.
2269 * Certain characters (as given by the CTRL_ALWAYS
2270 * bitmap) are always displayed as control characters,
2271 * as the console would be pretty useless without
2272 * them; to display an arbitrary font position use the
2273 * direct-to-font zone in UTF-8 mode.
2275 ok = tc && (c >= 32 ||
2276 !(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 :
2277 vc->vc_utf || ((CTRL_ACTION >> c) & 1)))
2278 && (c != 127 || vc->vc_disp_ctrl)
2281 if (vc->vc_state == ESnormal && ok) {
2282 if (vc->vc_utf && !vc->vc_disp_ctrl) {
2283 if (is_double_width(c))
2286 /* Now try to find out how to display it */
2287 tc = conv_uni_to_pc(vc, tc);
2288 if (tc & ~charmask) {
2289 if (tc == -1 || tc == -2) {
2290 continue; /* nothing to display */
2292 /* Glyph not found */
2293 if ((!(vc->vc_utf && !vc->vc_disp_ctrl) || c < 128) && !(c & ~charmask)) {
2294 /* In legacy mode use the glyph we get by a 1:1 mapping.
2295 This would make absolutely no sense with Unicode in mind,
2296 but do this for ASCII characters since a font may lack
2297 Unicode mapping info and we don't want to end up with
2298 having question marks only. */
2301 /* Display U+FFFD. If it's not found, display an inverse question mark. */
2302 tc = conv_uni_to_pc(vc, 0xfffd);
2305 tc = conv_uni_to_pc(vc, '?');
2306 if (tc < 0) tc = '?';
2312 vc_attr = vc->vc_attr;
2314 /* invert vc_attr */
2315 if (!vc->vc_can_do_color) {
2316 vc_attr = (vc->vc_attr) ^ 0x08;
2317 } else if (vc->vc_hi_font_mask == 0x100) {
2318 vc_attr = ((vc->vc_attr) & 0x11) | (((vc->vc_attr) & 0xe0) >> 4) | (((vc->vc_attr) & 0x0e) << 4);
2320 vc_attr = ((vc->vc_attr) & 0x88) | (((vc->vc_attr) & 0x70) >> 4) | (((vc->vc_attr) & 0x07) << 4);
2326 if (vc->vc_need_wrap || vc->vc_decim)
2328 if (vc->vc_need_wrap) {
2335 ((vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) :
2336 (vc_attr << 8) + tc,
2337 (u16 *) vc->vc_pos);
2338 if (DO_UPDATE(vc) && draw_x < 0) {
2340 draw_from = vc->vc_pos;
2342 if (vc->vc_x == vc->vc_cols - 1) {
2343 vc->vc_need_wrap = vc->vc_decawm;
2344 draw_to = vc->vc_pos + 2;
2347 draw_to = (vc->vc_pos += 2);
2350 if (!--width) break;
2352 tc = conv_uni_to_pc(vc, ' '); /* A space is printed in the second column */
2353 if (tc < 0) tc = ' ';
2355 notify_write(vc, c);
2366 goto rescan_last_byte;
2371 do_con_trol(tty, vc, orig);
2374 console_conditional_schedule();
2382 * This is the console switching callback.
2384 * Doing console switching in a process context allows
2385 * us to do the switches asynchronously (needed when we want
2386 * to switch due to a keyboard interrupt). Synchronization
2387 * with other console code and prevention of re-entrancy is
2388 * ensured with console_lock.
2390 static void console_callback(struct work_struct *ignored)
2394 if (want_console >= 0) {
2395 if (want_console != fg_console &&
2396 vc_cons_allocated(want_console)) {
2397 hide_cursor(vc_cons[fg_console].d);
2398 change_console(vc_cons[want_console].d);
2399 /* we only changed when the console had already
2400 been allocated - a new console is not created
2401 in an interrupt routine */
2405 if (do_poke_blanked_console) { /* do not unblank for a LED change */
2406 do_poke_blanked_console = 0;
2407 poke_blanked_console();
2409 if (scrollback_delta) {
2410 struct vc_data *vc = vc_cons[fg_console].d;
2412 if (vc->vc_mode == KD_TEXT)
2413 vc->vc_sw->con_scrolldelta(vc, scrollback_delta);
2414 scrollback_delta = 0;
2416 if (blank_timer_expired) {
2418 blank_timer_expired = 0;
2420 notify_update(vc_cons[fg_console].d);
2425 int set_console(int nr)
2427 struct vc_data *vc = vc_cons[fg_console].d;
2429 if (!vc_cons_allocated(nr) || vt_dont_switch ||
2430 (vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) {
2433 * Console switch will fail in console_callback() or
2434 * change_console() so there is no point scheduling
2437 * Existing set_console() users don't check the return
2438 * value so this shouldn't break anything
2444 schedule_console_callback();
2449 struct tty_driver *console_driver;
2451 #ifdef CONFIG_VT_CONSOLE
2454 * vt_kmsg_redirect() - Sets/gets the kernel message console
2455 * @new: The new virtual terminal number or -1 if the console should stay
2458 * By default, the kernel messages are always printed on the current virtual
2459 * console. However, the user may modify that default with the
2460 * TIOCL_SETKMSGREDIRECT ioctl call.
2462 * This function sets the kernel message console to be @new. It returns the old
2463 * virtual console number. The virtual terminal number 0 (both as parameter and
2464 * return value) means no redirection (i.e. always printed on the currently
2467 * The parameter -1 means that only the current console is returned, but the
2468 * value is not modified. You may use the macro vt_get_kmsg_redirect() in that
2469 * case to make the code more understandable.
2471 * When the kernel is compiled without CONFIG_VT_CONSOLE, this function ignores
2472 * the parameter and always returns 0.
2474 int vt_kmsg_redirect(int new)
2476 static int kmsg_con;
2479 return xchg(&kmsg_con, new);
2485 * Console on virtual terminal
2487 * The console must be locked when we get here.
2490 static void vt_console_print(struct console *co, const char *b, unsigned count)
2492 struct vc_data *vc = vc_cons[fg_console].d;
2494 static DEFINE_SPINLOCK(printing_lock);
2495 const ushort *start;
2500 /* console busy or not yet initialized */
2503 if (!spin_trylock(&printing_lock))
2506 kmsg_console = vt_get_kmsg_redirect();
2507 if (kmsg_console && vc_cons_allocated(kmsg_console - 1))
2508 vc = vc_cons[kmsg_console - 1].d;
2510 /* read `x' only after setting currcons properly (otherwise
2511 the `x' macro will read the x of the foreground console). */
2514 if (!vc_cons_allocated(fg_console)) {
2516 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2520 if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc))
2523 /* undraw cursor first */
2527 start = (ushort *)vc->vc_pos;
2529 /* Contrived structure to try to emulate original need_wrap behaviour
2530 * Problems caused when we have need_wrap set on '\n' character */
2533 if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) {
2535 if (CON_IS_VISIBLE(vc))
2536 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2538 if (vc->vc_need_wrap)
2542 if (c == 8) { /* backspace */
2544 start = (ushort *)vc->vc_pos;
2551 start = (ushort *)vc->vc_pos;
2553 if (c == 10 || c == 13)
2556 scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos);
2557 notify_write(vc, c);
2559 if (myx == vc->vc_cols - 1) {
2560 vc->vc_need_wrap = 1;
2567 if (CON_IS_VISIBLE(vc))
2568 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2570 if (vc->vc_x == vc->vc_cols) {
2572 vc->vc_need_wrap = 1;
2579 spin_unlock(&printing_lock);
2582 static struct tty_driver *vt_console_device(struct console *c, int *index)
2584 *index = c->index ? c->index-1 : fg_console;
2585 return console_driver;
2588 static struct console vt_console_driver = {
2590 .write = vt_console_print,
2591 .device = vt_console_device,
2592 .unblank = unblank_screen,
2593 .flags = CON_PRINTBUFFER,
2599 * Handling of Linux-specific VC ioctls
2603 * Generally a bit racy with respect to console_lock();.
2605 * There are some functions which don't need it.
2607 * There are some functions which can sleep for arbitrary periods
2608 * (paste_selection) but we don't need the lock there anyway.
2610 * set_selection has locking, and definitely needs it
2613 int tioclinux(struct tty_struct *tty, unsigned long arg)
2616 char __user *p = (char __user *)arg;
2620 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN))
2622 if (get_user(type, p))
2630 ret = set_selection((struct tiocl_selection __user *)(p+1), tty);
2633 case TIOCL_PASTESEL:
2634 ret = paste_selection(tty);
2636 case TIOCL_UNBLANKSCREEN:
2641 case TIOCL_SELLOADLUT:
2642 ret = sel_loadlut(p);
2644 case TIOCL_GETSHIFTSTATE:
2647 * Make it possible to react to Shift+Mousebutton.
2648 * Note that 'shift_state' is an undocumented
2649 * kernel-internal variable; programs not closely
2650 * related to the kernel should not use this.
2653 ret = __put_user(data, p);
2655 case TIOCL_GETMOUSEREPORTING:
2656 data = mouse_reporting();
2657 ret = __put_user(data, p);
2659 case TIOCL_SETVESABLANK:
2660 ret = set_vesa_blanking(p);
2662 case TIOCL_GETKMSGREDIRECT:
2663 data = vt_get_kmsg_redirect();
2664 ret = __put_user(data, p);
2666 case TIOCL_SETKMSGREDIRECT:
2667 if (!capable(CAP_SYS_ADMIN)) {
2670 if (get_user(data, p+1))
2673 vt_kmsg_redirect(data);
2676 case TIOCL_GETFGCONSOLE:
2679 case TIOCL_SCROLLCONSOLE:
2680 if (get_user(lines, (s32 __user *)(p+4))) {
2683 scrollfront(vc_cons[fg_console].d, lines);
2687 case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
2693 case TIOCL_BLANKEDSCREEN:
2694 ret = console_blanked;
2704 * /dev/ttyN handling
2707 static int con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2711 retval = do_con_write(tty, buf, count);
2712 con_flush_chars(tty);
2717 static int con_put_char(struct tty_struct *tty, unsigned char ch)
2720 return 0; /* n_r3964 calls put_char() from interrupt context */
2721 return do_con_write(tty, &ch, 1);
2724 static int con_write_room(struct tty_struct *tty)
2728 return 32768; /* No limit, really; we're not buffering */
2731 static int con_chars_in_buffer(struct tty_struct *tty)
2733 return 0; /* we're not buffering */
2737 * con_throttle and con_unthrottle are only used for
2738 * paste_selection(), which has to stuff in a large number of
2741 static void con_throttle(struct tty_struct *tty)
2745 static void con_unthrottle(struct tty_struct *tty)
2747 struct vc_data *vc = tty->driver_data;
2749 wake_up_interruptible(&vc->paste_wait);
2753 * Turn the Scroll-Lock LED on when the tty is stopped
2755 static void con_stop(struct tty_struct *tty)
2760 console_num = tty->index;
2761 if (!vc_cons_allocated(console_num))
2763 set_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2768 * Turn the Scroll-Lock LED off when the console is started
2770 static void con_start(struct tty_struct *tty)
2775 console_num = tty->index;
2776 if (!vc_cons_allocated(console_num))
2778 clr_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2782 static void con_flush_chars(struct tty_struct *tty)
2786 if (in_interrupt()) /* from flush_to_ldisc */
2789 /* if we race with con_close(), vt may be null */
2791 vc = tty->driver_data;
2798 * Allocate the console screen memory.
2800 static int con_open(struct tty_struct *tty, struct file *filp)
2802 unsigned int currcons = tty->index;
2806 if (tty->driver_data == NULL) {
2807 ret = vc_allocate(currcons);
2809 struct vc_data *vc = vc_cons[currcons].d;
2811 /* Still being freed */
2814 return -ERESTARTSYS;
2816 tty->driver_data = vc;
2819 if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
2820 tty->winsize.ws_row = vc_cons[currcons].d->vc_rows;
2821 tty->winsize.ws_col = vc_cons[currcons].d->vc_cols;
2824 tty->termios->c_iflag |= IUTF8;
2826 tty->termios->c_iflag &= ~IUTF8;
2835 static void con_close(struct tty_struct *tty, struct file *filp)
2837 /* Nothing to do - we defer to shutdown */
2840 static void con_shutdown(struct tty_struct *tty)
2842 struct vc_data *vc = tty->driver_data;
2845 vc->port.tty = NULL;
2850 static int default_italic_color = 2; // green (ASCII)
2851 static int default_underline_color = 3; // cyan (ASCII)
2852 module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR);
2853 module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR);
2855 static void vc_init(struct vc_data *vc, unsigned int rows,
2856 unsigned int cols, int do_clear)
2862 vc->vc_size_row = cols << 1;
2863 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
2866 vc->vc_pos = vc->vc_origin;
2868 for (j=k=0; j<16; j++) {
2869 vc->vc_palette[k++] = default_red[j] ;
2870 vc->vc_palette[k++] = default_grn[j] ;
2871 vc->vc_palette[k++] = default_blu[j] ;
2873 vc->vc_def_color = 0x07; /* white */
2874 vc->vc_ulcolor = default_underline_color;
2875 vc->vc_itcolor = default_italic_color;
2876 vc->vc_halfcolor = 0x08; /* grey */
2877 init_waitqueue_head(&vc->paste_wait);
2878 reset_terminal(vc, do_clear);
2882 * This routine initializes console interrupts, and does nothing
2883 * else. If you want the screen to clear, call tty_write with
2884 * the appropriate escape-sequence.
2887 static int __init con_init(void)
2889 const char *display_desc = NULL;
2891 unsigned int currcons = 0, i;
2896 display_desc = conswitchp->con_startup();
2897 if (!display_desc) {
2903 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2904 struct con_driver *con_driver = ®istered_con_driver[i];
2906 if (con_driver->con == NULL) {
2907 con_driver->con = conswitchp;
2908 con_driver->desc = display_desc;
2909 con_driver->flag = CON_DRIVER_FLAG_INIT;
2910 con_driver->first = 0;
2911 con_driver->last = MAX_NR_CONSOLES - 1;
2916 for (i = 0; i < MAX_NR_CONSOLES; i++)
2917 con_driver_map[i] = conswitchp;
2919 if (blankinterval) {
2920 blank_state = blank_normal_wait;
2921 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
2924 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) {
2925 vc_cons[currcons].d = vc = kzalloc(sizeof(struct vc_data), GFP_NOWAIT);
2926 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
2927 tty_port_init(&vc->port);
2928 visual_init(vc, currcons, 1);
2929 vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_NOWAIT);
2930 vc_init(vc, vc->vc_rows, vc->vc_cols,
2931 currcons || !vc->vc_sw->con_save_screen);
2933 currcons = fg_console = 0;
2934 master_display_fg = vc = vc_cons[currcons].d;
2937 gotoxy(vc, vc->vc_x, vc->vc_y);
2940 pr_info("Console: %s %s %dx%d",
2941 vc->vc_can_do_color ? "colour" : "mono",
2942 display_desc, vc->vc_cols, vc->vc_rows);
2948 #ifdef CONFIG_VT_CONSOLE
2949 register_console(&vt_console_driver);
2953 console_initcall(con_init);
2955 static const struct tty_operations con_ops = {
2959 .write_room = con_write_room,
2960 .put_char = con_put_char,
2961 .flush_chars = con_flush_chars,
2962 .chars_in_buffer = con_chars_in_buffer,
2964 #ifdef CONFIG_COMPAT
2965 .compat_ioctl = vt_compat_ioctl,
2969 .throttle = con_throttle,
2970 .unthrottle = con_unthrottle,
2971 .resize = vt_resize,
2972 .shutdown = con_shutdown
2975 static struct cdev vc0_cdev;
2977 static ssize_t show_tty_active(struct device *dev,
2978 struct device_attribute *attr, char *buf)
2980 return sprintf(buf, "tty%d\n", fg_console + 1);
2982 static DEVICE_ATTR(active, S_IRUGO, show_tty_active, NULL);
2984 int __init vty_init(const struct file_operations *console_fops)
2986 cdev_init(&vc0_cdev, console_fops);
2987 if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) ||
2988 register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0)
2989 panic("Couldn't register /dev/tty0 driver\n");
2990 tty0dev = device_create(tty_class, NULL, MKDEV(TTY_MAJOR, 0), NULL, "tty0");
2991 if (IS_ERR(tty0dev))
2994 WARN_ON(device_create_file(tty0dev, &dev_attr_active) < 0);
2998 console_driver = alloc_tty_driver(MAX_NR_CONSOLES);
2999 if (!console_driver)
3000 panic("Couldn't allocate console driver\n");
3001 console_driver->owner = THIS_MODULE;
3002 console_driver->name = "tty";
3003 console_driver->name_base = 1;
3004 console_driver->major = TTY_MAJOR;
3005 console_driver->minor_start = 1;
3006 console_driver->type = TTY_DRIVER_TYPE_CONSOLE;
3007 console_driver->init_termios = tty_std_termios;
3009 console_driver->init_termios.c_iflag |= IUTF8;
3010 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS;
3011 tty_set_operations(console_driver, &con_ops);
3012 if (tty_register_driver(console_driver))
3013 panic("Couldn't register console driver\n");
3016 #ifdef CONFIG_MDA_CONSOLE
3022 #ifndef VT_SINGLE_DRIVER
3024 static struct class *vtconsole_class;
3026 static int do_bind_con_driver(const struct consw *csw, int first, int last,
3029 struct module *owner = csw->owner;
3030 const char *desc = NULL;
3031 struct con_driver *con_driver;
3032 int i, j = -1, k = -1, retval = -ENODEV;
3034 if (!try_module_get(owner))
3037 WARN_CONSOLE_UNLOCKED();
3039 /* check if driver is registered */
3040 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3041 con_driver = ®istered_con_driver[i];
3043 if (con_driver->con == csw) {
3044 desc = con_driver->desc;
3053 if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) {
3055 con_driver->flag |= CON_DRIVER_FLAG_INIT;
3060 module_put(conswitchp->owner);
3062 __module_get(owner);
3066 first = max(first, con_driver->first);
3067 last = min(last, con_driver->last);
3069 for (i = first; i <= last; i++) {
3071 struct vc_data *vc = vc_cons[i].d;
3073 if (con_driver_map[i])
3074 module_put(con_driver_map[i]->owner);
3075 __module_get(owner);
3076 con_driver_map[i] = csw;
3078 if (!vc || !vc->vc_sw)
3083 if (CON_IS_VISIBLE(vc)) {
3088 old_was_color = vc->vc_can_do_color;
3089 vc->vc_sw->con_deinit(vc);
3090 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
3091 visual_init(vc, i, 0);
3095 /* If the console changed between mono <-> color, then
3096 * the attributes in the screenbuf will be wrong. The
3097 * following resets all attributes to something sane.
3099 if (old_was_color != vc->vc_can_do_color)
3100 clear_buffer_attributes(vc);
3103 pr_info("Console: switching ");
3105 printk("consoles %d-%d ", first+1, last+1);
3107 struct vc_data *vc = vc_cons[j].d;
3109 printk("to %s %s %dx%d\n",
3110 vc->vc_can_do_color ? "colour" : "mono",
3111 desc, vc->vc_cols, vc->vc_rows);
3118 printk("to %s\n", desc);
3127 static int bind_con_driver(const struct consw *csw, int first, int last,
3133 ret = do_bind_con_driver(csw, first, last, deflt);
3138 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
3139 static int con_is_graphics(const struct consw *csw, int first, int last)
3143 for (i = first; i <= last; i++) {
3144 struct vc_data *vc = vc_cons[i].d;
3146 if (vc && vc->vc_mode == KD_GRAPHICS) {
3156 * unbind_con_driver - unbind a console driver
3157 * @csw: pointer to console driver to unregister
3158 * @first: first in range of consoles that @csw should be unbound from
3159 * @last: last in range of consoles that @csw should be unbound from
3160 * @deflt: should next bound console driver be default after @csw is unbound?
3162 * To unbind a driver from all possible consoles, pass 0 as @first and
3163 * %MAX_NR_CONSOLES as @last.
3165 * @deflt controls whether the console that ends up replacing @csw should be
3166 * the default console.
3169 * -ENODEV if @csw isn't a registered console driver or can't be unregistered
3172 int unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
3177 retval = do_unbind_con_driver(csw, first, last, deflt);
3181 EXPORT_SYMBOL(unbind_con_driver);
3183 /* unlocked version of unbind_con_driver() */
3184 int do_unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
3186 struct module *owner = csw->owner;
3187 const struct consw *defcsw = NULL;
3188 struct con_driver *con_driver = NULL, *con_back = NULL;
3189 int i, retval = -ENODEV;
3191 if (!try_module_get(owner))
3194 WARN_CONSOLE_UNLOCKED();
3196 /* check if driver is registered and if it is unbindable */
3197 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3198 con_driver = ®istered_con_driver[i];
3200 if (con_driver->con == csw &&
3201 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3212 /* check if backup driver exists */
3213 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3214 con_back = ®istered_con_driver[i];
3216 if (con_back->con &&
3217 !(con_back->flag & CON_DRIVER_FLAG_MODULE)) {
3218 defcsw = con_back->con;
3227 if (!con_is_bound(csw))
3230 first = max(first, con_driver->first);
3231 last = min(last, con_driver->last);
3233 for (i = first; i <= last; i++) {
3234 if (con_driver_map[i] == csw) {
3235 module_put(csw->owner);
3236 con_driver_map[i] = NULL;
3240 if (!con_is_bound(defcsw)) {
3241 const struct consw *defconsw = conswitchp;
3243 defcsw->con_startup();
3244 con_back->flag |= CON_DRIVER_FLAG_INIT;
3246 * vgacon may change the default driver to point
3247 * to dummycon, we restore it here...
3249 conswitchp = defconsw;
3252 if (!con_is_bound(csw))
3253 con_driver->flag &= ~CON_DRIVER_FLAG_INIT;
3255 /* ignore return value, binding should not fail */
3256 do_bind_con_driver(defcsw, first, last, deflt);
3262 EXPORT_SYMBOL_GPL(do_unbind_con_driver);
3264 static int vt_bind(struct con_driver *con)
3266 const struct consw *defcsw = NULL, *csw = NULL;
3267 int i, more = 1, first = -1, last = -1, deflt = 0;
3269 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3270 con_is_graphics(con->con, con->first, con->last))
3275 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3276 struct con_driver *con = ®istered_con_driver[i];
3278 if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) {
3290 for (i = con->first; i <= con->last; i++) {
3291 if (con_driver_map[i] == defcsw) {
3296 } else if (first != -1)
3300 if (first == 0 && last == MAX_NR_CONSOLES -1)
3304 bind_con_driver(csw, first, last, deflt);
3315 static int vt_unbind(struct con_driver *con)
3317 const struct consw *csw = NULL;
3318 int i, more = 1, first = -1, last = -1, deflt = 0;
3320 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3321 con_is_graphics(con->con, con->first, con->last))
3329 for (i = con->first; i <= con->last; i++) {
3330 if (con_driver_map[i] == csw) {
3335 } else if (first != -1)
3339 if (first == 0 && last == MAX_NR_CONSOLES -1)
3343 unbind_con_driver(csw, first, last, deflt);
3354 static inline int vt_bind(struct con_driver *con)
3358 static inline int vt_unbind(struct con_driver *con)
3362 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3364 static ssize_t store_bind(struct device *dev, struct device_attribute *attr,
3365 const char *buf, size_t count)
3367 struct con_driver *con = dev_get_drvdata(dev);
3368 int bind = simple_strtoul(buf, NULL, 0);
3378 static ssize_t show_bind(struct device *dev, struct device_attribute *attr,
3381 struct con_driver *con = dev_get_drvdata(dev);
3382 int bind = con_is_bound(con->con);
3384 return snprintf(buf, PAGE_SIZE, "%i\n", bind);
3387 static ssize_t show_name(struct device *dev, struct device_attribute *attr,
3390 struct con_driver *con = dev_get_drvdata(dev);
3392 return snprintf(buf, PAGE_SIZE, "%s %s\n",
3393 (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)",
3398 static struct device_attribute device_attrs[] = {
3399 __ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind),
3400 __ATTR(name, S_IRUGO, show_name, NULL),
3403 static int vtconsole_init_device(struct con_driver *con)
3408 con->flag |= CON_DRIVER_FLAG_ATTR;
3409 dev_set_drvdata(con->dev, con);
3410 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3411 error = device_create_file(con->dev, &device_attrs[i]);
3418 device_remove_file(con->dev, &device_attrs[i]);
3419 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3425 static void vtconsole_deinit_device(struct con_driver *con)
3429 if (con->flag & CON_DRIVER_FLAG_ATTR) {
3430 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3431 device_remove_file(con->dev, &device_attrs[i]);
3432 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3437 * con_is_bound - checks if driver is bound to the console
3438 * @csw: console driver
3440 * RETURNS: zero if unbound, nonzero if bound
3442 * Drivers can call this and if zero, they should release
3443 * all resources allocated on con_startup()
3445 int con_is_bound(const struct consw *csw)
3449 for (i = 0; i < MAX_NR_CONSOLES; i++) {
3450 if (con_driver_map[i] == csw) {
3458 EXPORT_SYMBOL(con_is_bound);
3461 * con_debug_enter - prepare the console for the kernel debugger
3462 * @sw: console driver
3464 * Called when the console is taken over by the kernel debugger, this
3465 * function needs to save the current console state, then put the console
3466 * into a state suitable for the kernel debugger.
3469 * Zero on success, nonzero if a failure occurred when trying to prepare
3470 * the console for the debugger.
3472 int con_debug_enter(struct vc_data *vc)
3476 saved_fg_console = fg_console;
3477 saved_last_console = last_console;
3478 saved_want_console = want_console;
3479 saved_vc_mode = vc->vc_mode;
3480 saved_console_blanked = console_blanked;
3481 vc->vc_mode = KD_TEXT;
3482 console_blanked = 0;
3483 if (vc->vc_sw->con_debug_enter)
3484 ret = vc->vc_sw->con_debug_enter(vc);
3485 #ifdef CONFIG_KGDB_KDB
3486 /* Set the initial LINES variable if it is not already set */
3487 if (vc->vc_rows < 999) {
3490 const char *setargs[3] = {
3495 if (kdbgetintenv(setargs[0], &linecount)) {
3496 snprintf(lns, 4, "%i", vc->vc_rows);
3497 kdb_set(2, setargs);
3500 #endif /* CONFIG_KGDB_KDB */
3503 EXPORT_SYMBOL_GPL(con_debug_enter);
3506 * con_debug_leave - restore console state
3507 * @sw: console driver
3509 * Restore the console state to what it was before the kernel debugger
3513 * Zero on success, nonzero if a failure occurred when trying to restore
3516 int con_debug_leave(void)
3521 fg_console = saved_fg_console;
3522 last_console = saved_last_console;
3523 want_console = saved_want_console;
3524 console_blanked = saved_console_blanked;
3525 vc_cons[fg_console].d->vc_mode = saved_vc_mode;
3527 vc = vc_cons[fg_console].d;
3528 if (vc->vc_sw->con_debug_leave)
3529 ret = vc->vc_sw->con_debug_leave(vc);
3532 EXPORT_SYMBOL_GPL(con_debug_leave);
3534 static int do_register_con_driver(const struct consw *csw, int first, int last)
3536 struct module *owner = csw->owner;
3537 struct con_driver *con_driver;
3541 WARN_CONSOLE_UNLOCKED();
3543 if (!try_module_get(owner))
3546 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3547 con_driver = ®istered_con_driver[i];
3549 /* already registered */
3550 if (con_driver->con == csw)
3557 desc = csw->con_startup();
3565 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3566 con_driver = ®istered_con_driver[i];
3568 if (con_driver->con == NULL) {
3569 con_driver->con = csw;
3570 con_driver->desc = desc;
3571 con_driver->node = i;
3572 con_driver->flag = CON_DRIVER_FLAG_MODULE |
3573 CON_DRIVER_FLAG_INIT;
3574 con_driver->first = first;
3575 con_driver->last = last;
3584 con_driver->dev = device_create(vtconsole_class, NULL,
3585 MKDEV(0, con_driver->node),
3589 if (IS_ERR(con_driver->dev)) {
3590 printk(KERN_WARNING "Unable to create device for %s; "
3591 "errno = %ld\n", con_driver->desc,
3592 PTR_ERR(con_driver->dev));
3593 con_driver->dev = NULL;
3595 vtconsole_init_device(con_driver);
3604 * register_con_driver - register console driver to console layer
3605 * @csw: console driver
3606 * @first: the first console to take over, minimum value is 0
3607 * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1
3609 * DESCRIPTION: This function registers a console driver which can later
3610 * bind to a range of consoles specified by @first and @last. It will
3611 * also initialize the console driver by calling con_startup().
3613 int register_con_driver(const struct consw *csw, int first, int last)
3618 retval = do_register_con_driver(csw, first, last);
3622 EXPORT_SYMBOL(register_con_driver);
3625 * unregister_con_driver - unregister console driver from console layer
3626 * @csw: console driver
3628 * DESCRIPTION: All drivers that registers to the console layer must
3629 * call this function upon exit, or if the console driver is in a state
3630 * where it won't be able to handle console services, such as the
3631 * framebuffer console without loaded framebuffer drivers.
3633 * The driver must unbind first prior to unregistration.
3635 int unregister_con_driver(const struct consw *csw)
3640 retval = do_unregister_con_driver(csw);
3644 EXPORT_SYMBOL(unregister_con_driver);
3646 int do_unregister_con_driver(const struct consw *csw)
3648 int i, retval = -ENODEV;
3650 /* cannot unregister a bound driver */
3651 if (con_is_bound(csw))
3654 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3655 struct con_driver *con_driver = ®istered_con_driver[i];
3657 if (con_driver->con == csw &&
3658 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3659 vtconsole_deinit_device(con_driver);
3660 device_destroy(vtconsole_class,
3661 MKDEV(0, con_driver->node));
3662 con_driver->con = NULL;
3663 con_driver->desc = NULL;
3664 con_driver->dev = NULL;
3665 con_driver->node = 0;
3666 con_driver->flag = 0;
3667 con_driver->first = 0;
3668 con_driver->last = 0;
3676 EXPORT_SYMBOL_GPL(do_unregister_con_driver);
3679 * If we support more console drivers, this function is used
3680 * when a driver wants to take over some existing consoles
3681 * and become default driver for newly opened ones.
3683 * take_over_console is basically a register followed by unbind
3685 int do_take_over_console(const struct consw *csw, int first, int last, int deflt)
3689 err = do_register_con_driver(csw, first, last);
3691 * If we get an busy error we still want to bind the console driver
3692 * and return success, as we may have unbound the console driver
3693 * but not unregistered it.
3698 do_bind_con_driver(csw, first, last, deflt);
3702 EXPORT_SYMBOL_GPL(do_take_over_console);
3705 * If we support more console drivers, this function is used
3706 * when a driver wants to take over some existing consoles
3707 * and become default driver for newly opened ones.
3709 * take_over_console is basically a register followed by unbind
3711 int take_over_console(const struct consw *csw, int first, int last, int deflt)
3715 err = register_con_driver(csw, first, last);
3717 * If we get an busy error we still want to bind the console driver
3718 * and return success, as we may have unbound the console driver
3719 * but not unregistered it.
3724 bind_con_driver(csw, first, last, deflt);
3730 * give_up_console is a wrapper to unregister_con_driver. It will only
3731 * work if driver is fully unbound.
3733 void give_up_console(const struct consw *csw)
3735 unregister_con_driver(csw);
3738 static int __init vtconsole_class_init(void)
3742 vtconsole_class = class_create(THIS_MODULE, "vtconsole");
3743 if (IS_ERR(vtconsole_class)) {
3744 printk(KERN_WARNING "Unable to create vt console class; "
3745 "errno = %ld\n", PTR_ERR(vtconsole_class));
3746 vtconsole_class = NULL;
3749 /* Add system drivers to sysfs */
3750 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3751 struct con_driver *con = ®istered_con_driver[i];
3753 if (con->con && !con->dev) {
3754 con->dev = device_create(vtconsole_class, NULL,
3755 MKDEV(0, con->node),
3759 if (IS_ERR(con->dev)) {
3760 printk(KERN_WARNING "Unable to create "
3761 "device for %s; errno = %ld\n",
3762 con->desc, PTR_ERR(con->dev));
3765 vtconsole_init_device(con);
3772 postcore_initcall(vtconsole_class_init);
3780 static int set_vesa_blanking(char __user *p)
3784 if (get_user(mode, p + 1))
3787 vesa_blank_mode = (mode < 4) ? mode : 0;
3791 void do_blank_screen(int entering_gfx)
3793 struct vc_data *vc = vc_cons[fg_console].d;
3796 WARN_CONSOLE_UNLOCKED();
3798 if (console_blanked) {
3799 if (blank_state == blank_vesa_wait) {
3800 blank_state = blank_off;
3801 vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0);
3806 /* entering graphics mode? */
3810 vc->vc_sw->con_blank(vc, -1, 1);
3811 console_blanked = fg_console + 1;
3812 blank_state = blank_off;
3817 if (blank_state != blank_normal_wait)
3819 blank_state = blank_off;
3821 /* don't blank graphics */
3822 if (vc->vc_mode != KD_TEXT) {
3823 console_blanked = fg_console + 1;
3828 del_timer_sync(&console_timer);
3829 blank_timer_expired = 0;
3832 /* In case we need to reset origin, blanking hook returns 1 */
3833 i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0);
3834 console_blanked = fg_console + 1;
3838 if (console_blank_hook && console_blank_hook(1))
3841 if (vesa_off_interval && vesa_blank_mode) {
3842 blank_state = blank_vesa_wait;
3843 mod_timer(&console_timer, jiffies + vesa_off_interval);
3845 vt_event_post(VT_EVENT_BLANK, vc->vc_num, vc->vc_num);
3847 EXPORT_SYMBOL(do_blank_screen);
3850 * Called by timer as well as from vt_console_driver
3852 void do_unblank_screen(int leaving_gfx)
3856 /* This should now always be called from a "sane" (read: can schedule)
3857 * context for the sake of the low level drivers, except in the special
3858 * case of oops_in_progress
3860 if (!oops_in_progress)
3863 WARN_CONSOLE_UNLOCKED();
3866 if (!console_blanked)
3868 if (!vc_cons_allocated(fg_console)) {
3870 pr_warning("unblank_screen: tty %d not allocated ??\n",
3874 vc = vc_cons[fg_console].d;
3875 /* Try to unblank in oops case too */
3876 if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc))
3877 return; /* but leave console_blanked != 0 */
3879 if (blankinterval) {
3880 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
3881 blank_state = blank_normal_wait;
3884 console_blanked = 0;
3885 if (vc->vc_sw->con_blank(vc, 0, leaving_gfx) || vt_force_oops_output(vc))
3886 /* Low-level driver cannot restore -> do it ourselves */
3888 if (console_blank_hook)
3889 console_blank_hook(0);
3892 vt_event_post(VT_EVENT_UNBLANK, vc->vc_num, vc->vc_num);
3894 EXPORT_SYMBOL(do_unblank_screen);
3897 * This is called by the outside world to cause a forced unblank, mostly for
3898 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
3899 * call it with 1 as an argument and so force a mode restore... that may kill
3900 * X or at least garbage the screen but would also make the Oops visible...
3902 void unblank_screen(void)
3904 do_unblank_screen(0);
3908 * We defer the timer blanking to work queue so it can take the console mutex
3909 * (console operations can still happen at irq time, but only from printk which
3910 * has the console mutex. Not perfect yet, but better than no locking
3912 static void blank_screen_t(unsigned long dummy)
3914 if (unlikely(!keventd_up())) {
3915 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
3918 blank_timer_expired = 1;
3919 schedule_work(&console_work);
3922 void poke_blanked_console(void)
3924 WARN_CONSOLE_UNLOCKED();
3926 /* Add this so we quickly catch whoever might call us in a non
3927 * safe context. Nowadays, unblank_screen() isn't to be called in
3928 * atomic contexts and is allowed to schedule (with the special case
3929 * of oops_in_progress, but that isn't of any concern for this
3934 /* This isn't perfectly race free, but a race here would be mostly harmless,
3935 * at worse, we'll do a spurrious blank and it's unlikely
3937 del_timer(&console_timer);
3938 blank_timer_expired = 0;
3940 if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS)
3942 if (console_blanked)
3944 else if (blankinterval) {
3945 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
3946 blank_state = blank_normal_wait;
3954 static void set_palette(struct vc_data *vc)
3956 WARN_CONSOLE_UNLOCKED();
3958 if (vc->vc_mode != KD_GRAPHICS)
3959 vc->vc_sw->con_set_palette(vc, color_table);
3962 static int set_get_cmap(unsigned char __user *arg, int set)
3966 WARN_CONSOLE_UNLOCKED();
3968 for (i = 0; i < 16; i++)
3970 get_user(default_red[i], arg++);
3971 get_user(default_grn[i], arg++);
3972 get_user(default_blu[i], arg++);
3974 put_user(default_red[i], arg++);
3975 put_user(default_grn[i], arg++);
3976 put_user(default_blu[i], arg++);
3979 for (i = 0; i < MAX_NR_CONSOLES; i++)
3980 if (vc_cons_allocated(i)) {
3981 for (j = k = 0; j < 16; j++) {
3982 vc_cons[i].d->vc_palette[k++] = default_red[j];
3983 vc_cons[i].d->vc_palette[k++] = default_grn[j];
3984 vc_cons[i].d->vc_palette[k++] = default_blu[j];
3986 set_palette(vc_cons[i].d);
3993 * Load palette into the DAC registers. arg points to a colour
3994 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
3997 int con_set_cmap(unsigned char __user *arg)
4002 rc = set_get_cmap (arg,1);
4008 int con_get_cmap(unsigned char __user *arg)
4013 rc = set_get_cmap (arg,0);
4019 void reset_palette(struct vc_data *vc)
4022 for (j=k=0; j<16; j++) {
4023 vc->vc_palette[k++] = default_red[j];
4024 vc->vc_palette[k++] = default_grn[j];
4025 vc->vc_palette[k++] = default_blu[j];
4033 * Currently we only support fonts up to 32 pixels wide, at a maximum height
4034 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
4035 * depending on width) reserved for each character which is kinda wasty, but
4036 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
4037 * is up to the actual low-level console-driver convert data into its favorite
4038 * format (maybe we should add a `fontoffset' field to the `display'
4039 * structure so we won't have to convert the fontdata all the time.
4043 #define max_font_size 65536
4045 static int con_font_get(struct vc_data *vc, struct console_font_op *op)
4047 struct console_font font;
4051 if (vc->vc_mode != KD_TEXT)
4055 font.data = kmalloc(max_font_size, GFP_KERNEL);
4062 if (vc->vc_sw->con_font_get)
4063 rc = vc->vc_sw->con_font_get(vc, &font);
4071 c = (font.width+7)/8 * 32 * font.charcount;
4073 if (op->data && font.charcount > op->charcount)
4075 if (!(op->flags & KD_FONT_FLAG_OLD)) {
4076 if (font.width > op->width || font.height > op->height)
4079 if (font.width != 8)
4081 else if ((op->height && font.height > op->height) ||
4088 op->height = font.height;
4089 op->width = font.width;
4090 op->charcount = font.charcount;
4092 if (op->data && copy_to_user(op->data, font.data, c))
4100 static int con_font_set(struct vc_data *vc, struct console_font_op *op)
4102 struct console_font font;
4106 if (vc->vc_mode != KD_TEXT)
4110 if (op->charcount > 512)
4112 if (!op->height) { /* Need to guess font height [compat] */
4114 u8 __user *charmap = op->data;
4117 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
4118 so that we can get rid of this soon */
4119 if (!(op->flags & KD_FONT_FLAG_OLD))
4121 for (h = 32; h > 0; h--)
4122 for (i = 0; i < op->charcount; i++) {
4123 if (get_user(tmp, &charmap[32*i+h-1]))
4132 if (op->width <= 0 || op->width > 32 || op->height > 32)
4134 size = (op->width+7)/8 * 32 * op->charcount;
4135 if (size > max_font_size)
4137 font.charcount = op->charcount;
4138 font.height = op->height;
4139 font.width = op->width;
4140 font.data = memdup_user(op->data, size);
4141 if (IS_ERR(font.data))
4142 return PTR_ERR(font.data);
4144 if (vc->vc_sw->con_font_set)
4145 rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
4153 static int con_font_default(struct vc_data *vc, struct console_font_op *op)
4155 struct console_font font = {.width = op->width, .height = op->height};
4156 char name[MAX_FONT_NAME];
4160 if (vc->vc_mode != KD_TEXT)
4165 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0)
4168 name[MAX_FONT_NAME - 1] = 0;
4171 if (vc->vc_sw->con_font_default)
4172 rc = vc->vc_sw->con_font_default(vc, &font, s);
4177 op->width = font.width;
4178 op->height = font.height;
4183 static int con_font_copy(struct vc_data *vc, struct console_font_op *op)
4185 int con = op->height;
4188 if (vc->vc_mode != KD_TEXT)
4192 if (!vc->vc_sw->con_font_copy)
4194 else if (con < 0 || !vc_cons_allocated(con))
4196 else if (con == vc->vc_num) /* nothing to do */
4199 rc = vc->vc_sw->con_font_copy(vc, con);
4204 int con_font_op(struct vc_data *vc, struct console_font_op *op)
4207 case KD_FONT_OP_SET:
4208 return con_font_set(vc, op);
4209 case KD_FONT_OP_GET:
4210 return con_font_get(vc, op);
4211 case KD_FONT_OP_SET_DEFAULT:
4212 return con_font_default(vc, op);
4213 case KD_FONT_OP_COPY:
4214 return con_font_copy(vc, op);
4220 * Interface exported to selection and vcs.
4223 /* used by selection */
4224 u16 screen_glyph(struct vc_data *vc, int offset)
4226 u16 w = scr_readw(screenpos(vc, offset, 1));
4229 if (w & vc->vc_hi_font_mask)
4233 EXPORT_SYMBOL_GPL(screen_glyph);
4235 /* used by vcs - note the word offset */
4236 unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed)
4238 return screenpos(vc, 2 * w_offset, viewed);
4241 void getconsxy(struct vc_data *vc, unsigned char *p)
4247 void putconsxy(struct vc_data *vc, unsigned char *p)
4250 gotoxy(vc, p[0], p[1]);
4254 u16 vcs_scr_readw(struct vc_data *vc, const u16 *org)
4256 if ((unsigned long)org == vc->vc_pos && softcursor_original != -1)
4257 return softcursor_original;
4258 return scr_readw(org);
4261 void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org)
4263 scr_writew(val, org);
4264 if ((unsigned long)org == vc->vc_pos) {
4265 softcursor_original = -1;
4270 void vcs_scr_updated(struct vc_data *vc)
4276 * Visible symbols for modules
4279 EXPORT_SYMBOL(color_table);
4280 EXPORT_SYMBOL(default_red);
4281 EXPORT_SYMBOL(default_grn);
4282 EXPORT_SYMBOL(default_blu);
4283 EXPORT_SYMBOL(update_region);
4284 EXPORT_SYMBOL(redraw_screen);
4285 EXPORT_SYMBOL(vc_resize);
4286 EXPORT_SYMBOL(fg_console);
4287 EXPORT_SYMBOL(console_blank_hook);
4288 EXPORT_SYMBOL(console_blanked);
4289 EXPORT_SYMBOL(vc_cons);
4290 EXPORT_SYMBOL(global_cursor_default);
4291 #ifndef VT_SINGLE_DRIVER
4292 EXPORT_SYMBOL(take_over_console);
4293 EXPORT_SYMBOL(give_up_console);