2 * Copyright (C) 1991, 1992 Linus Torvalds
6 * Hopefully this will be a rather complete VT102 implementation.
8 * Beeping thanks to John T Kohl.
10 * Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics
11 * Chars, and VT100 enhancements by Peter MacDonald.
13 * Copy and paste function by Andrew Haylett,
14 * some enhancements by Alessandro Rubini.
16 * Code to check for different video-cards mostly by Galen Hunt,
17 * <g-hunt@ee.utah.edu>
19 * Rudimentary ISO 10646/Unicode/UTF-8 character set support by
20 * Markus Kuhn, <mskuhn@immd4.informatik.uni-erlangen.de>.
22 * Dynamic allocation of consoles, aeb@cwi.nl, May 1994
23 * Resizing of consoles, aeb, 940926
25 * Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94
28 * User-defined bell sound, new setterm control sequences and printk
29 * redirection by Martin Mares <mj@k332.feld.cvut.cz> 19-Nov-95
31 * APM screenblank bug fixed Takashi Manabe <manabe@roy.dsl.tutics.tut.jp>
33 * Merge with the abstract console driver by Geert Uytterhoeven
34 * <geert@linux-m68k.org>, Jan 1997.
36 * Original m68k console driver modifications by
38 * - Arno Griffioen <arno@usn.nl>
39 * - David Carter <carter@cs.bris.ac.uk>
41 * The abstract console driver provides a generic interface for a text
42 * console. It supports VGA text mode, frame buffer based graphical consoles
43 * and special graphics processors that are only accessible through some
44 * registers (e.g. a TMS340x0 GSP).
46 * The interface to the hardware is specified using a special structure
47 * (struct consw) which contains function pointers to console operations
48 * (see <linux/console.h> for more information).
50 * Support for changeable cursor shape
51 * by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997
53 * Ported to i386 and con_scrolldelta fixed
54 * by Emmanuel Marty <core@ggi-project.org>, April 1998
56 * Resurrected character buffers in videoram plus lots of other trickery
57 * by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998
59 * Removed old-style timers, introduced console_timer, made timer
60 * deletion SMP-safe. 17Jun00, Andrew Morton
62 * Removed console_lock, enabled interrupts across all console operations
63 * 13 March 2001, Andrew Morton
65 * Fixed UTF-8 mode so alternate charset modes always work according
66 * to control sequences interpreted in do_con_trol function
67 * preserving backward VT100 semigraphics compatibility,
68 * malformed UTF sequences represented as sequences of replacement glyphs,
69 * original codes or '?' as a last resort if replacement glyph is undefined
70 * by Adam Tla/lka <atlka@pg.gda.pl>, Aug 2006
73 #include <linux/module.h>
74 #include <linux/types.h>
75 #include <linux/sched.h>
76 #include <linux/tty.h>
77 #include <linux/tty_flip.h>
78 #include <linux/kernel.h>
79 #include <linux/string.h>
80 #include <linux/errno.h>
82 #include <linux/slab.h>
83 #include <linux/major.h>
85 #include <linux/console.h>
86 #include <linux/init.h>
87 #include <linux/mutex.h>
88 #include <linux/vt_kern.h>
89 #include <linux/selection.h>
90 #include <linux/tiocl.h>
91 #include <linux/kbd_kern.h>
92 #include <linux/consolemap.h>
93 #include <linux/timer.h>
94 #include <linux/interrupt.h>
95 #include <linux/workqueue.h>
97 #include <linux/font.h>
98 #include <linux/bitops.h>
99 #include <linux/notifier.h>
100 #include <linux/device.h>
101 #include <linux/io.h>
102 #include <linux/uaccess.h>
103 #include <linux/kdb.h>
104 #include <linux/ctype.h>
106 #define MAX_NR_CON_DRIVER 16
108 #define CON_DRIVER_FLAG_MODULE 1
109 #define CON_DRIVER_FLAG_INIT 2
110 #define CON_DRIVER_FLAG_ATTR 4
113 const struct consw *con;
122 static struct con_driver registered_con_driver[MAX_NR_CON_DRIVER];
123 const struct consw *conswitchp;
125 /* A bitmap for codes <32. A bit of 1 indicates that the code
126 * corresponding to that bit number invokes some special action
127 * (such as cursor movement) and should not be displayed as a
128 * glyph unless the disp_ctrl mode is explicitly enabled.
130 #define CTRL_ACTION 0x0d00ff81
131 #define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */
134 * Here is the default bell parameters: 750HZ, 1/8th of a second
136 #define DEFAULT_BELL_PITCH 750
137 #define DEFAULT_BELL_DURATION (HZ/8)
139 struct vc vc_cons [MAX_NR_CONSOLES];
141 #ifndef VT_SINGLE_DRIVER
142 static const struct consw *con_driver_map[MAX_NR_CONSOLES];
145 static int con_open(struct tty_struct *, struct file *);
146 static void vc_init(struct vc_data *vc, unsigned int rows,
147 unsigned int cols, int do_clear);
148 static void gotoxy(struct vc_data *vc, int new_x, int new_y);
149 static void save_cur(struct vc_data *vc);
150 static void reset_terminal(struct vc_data *vc, int do_clear);
151 static void con_flush_chars(struct tty_struct *tty);
152 static int set_vesa_blanking(char __user *p);
153 static void set_cursor(struct vc_data *vc);
154 static void hide_cursor(struct vc_data *vc);
155 static void console_callback(struct work_struct *ignored);
156 static void blank_screen_t(unsigned long dummy);
157 static void set_palette(struct vc_data *vc);
159 static int printable; /* Is console ready for printing? */
160 int default_utf8 = true;
161 module_param(default_utf8, int, S_IRUGO | S_IWUSR);
162 int global_cursor_default = -1;
163 module_param(global_cursor_default, int, S_IRUGO | S_IWUSR);
165 static int cur_default = CUR_DEFAULT;
166 module_param(cur_default, int, S_IRUGO | S_IWUSR);
169 * ignore_poke: don't unblank the screen when things are typed. This is
170 * mainly for the privacy of braille terminal users.
172 static int ignore_poke;
174 int do_poke_blanked_console;
177 static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
178 static int vesa_off_interval;
179 static int blankinterval = 10*60;
180 core_param(consoleblank, blankinterval, int, 0444);
182 static DECLARE_WORK(console_work, console_callback);
185 * fg_console is the current virtual console,
186 * last_console is the last used one,
187 * want_console is the console we want to switch to,
188 * saved_* variants are for save/restore around kernel debugger enter/leave
192 int want_console = -1;
193 static int saved_fg_console;
194 static int saved_last_console;
195 static int saved_want_console;
196 static int saved_vc_mode;
197 static int saved_console_blanked;
200 * For each existing display, we have a pointer to console currently visible
201 * on that display, allowing consoles other than fg_console to be refreshed
202 * appropriately. Unless the low-level driver supplies its own display_fg
203 * variable, we use this one for the "master display".
205 static struct vc_data *master_display_fg;
208 * Unfortunately, we need to delay tty echo when we're currently writing to the
209 * console since the code is (and always was) not re-entrant, so we schedule
210 * all flip requests to process context with schedule-task() and run it from
211 * console_callback().
215 * For the same reason, we defer scrollback to the console callback.
217 static int scrollback_delta;
220 * Hook so that the power management routines can (un)blank
221 * the console on our behalf.
223 int (*console_blank_hook)(int);
225 static DEFINE_TIMER(console_timer, blank_screen_t, 0, 0);
226 static int blank_state;
227 static int blank_timer_expired;
235 * /sys/class/tty/tty0/
237 * the attribute 'active' contains the name of the current vc
238 * console and it supports poll() to detect vc switches
240 static struct device *tty0dev;
243 * Notifier list for console events.
245 static ATOMIC_NOTIFIER_HEAD(vt_notifier_list);
247 int register_vt_notifier(struct notifier_block *nb)
249 return atomic_notifier_chain_register(&vt_notifier_list, nb);
251 EXPORT_SYMBOL_GPL(register_vt_notifier);
253 int unregister_vt_notifier(struct notifier_block *nb)
255 return atomic_notifier_chain_unregister(&vt_notifier_list, nb);
257 EXPORT_SYMBOL_GPL(unregister_vt_notifier);
259 static void notify_write(struct vc_data *vc, unsigned int unicode)
261 struct vt_notifier_param param = { .vc = vc, .c = unicode };
262 atomic_notifier_call_chain(&vt_notifier_list, VT_WRITE, ¶m);
265 static void notify_update(struct vc_data *vc)
267 struct vt_notifier_param param = { .vc = vc };
268 atomic_notifier_call_chain(&vt_notifier_list, VT_UPDATE, ¶m);
271 * Low-Level Functions
274 #define IS_FG(vc) ((vc)->vc_num == fg_console)
276 #ifdef VT_BUF_VRAM_ONLY
277 #define DO_UPDATE(vc) 0
279 #define DO_UPDATE(vc) (CON_IS_VISIBLE(vc) && !console_blanked)
282 static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed)
287 p = (unsigned short *)(vc->vc_origin + offset);
288 else if (!vc->vc_sw->con_screen_pos)
289 p = (unsigned short *)(vc->vc_visible_origin + offset);
291 p = vc->vc_sw->con_screen_pos(vc, offset);
295 /* Called from the keyboard irq path.. */
296 static inline void scrolldelta(int lines)
299 /* scrolldelta needs some kind of consistency lock, but the BKL was
300 and still is not protecting versus the scheduled back end */
301 scrollback_delta += lines;
302 schedule_console_callback();
305 void schedule_console_callback(void)
307 schedule_work(&console_work);
310 static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
312 unsigned short *d, *s;
316 if (b > vc->vc_rows || t >= b || nr < 1)
318 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr))
320 d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
321 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr));
322 scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row);
323 scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_video_erase_char,
324 vc->vc_size_row * nr);
327 static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
334 if (b > vc->vc_rows || t >= b || nr < 1)
336 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr))
338 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
339 step = vc->vc_cols * nr;
340 scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row);
341 scr_memsetw(s, vc->vc_video_erase_char, 2 * step);
344 static void do_update_region(struct vc_data *vc, unsigned long start, int count)
346 #ifndef VT_BUF_VRAM_ONLY
347 unsigned int xx, yy, offset;
351 if (!vc->vc_sw->con_getxy) {
352 offset = (start - vc->vc_origin) / 2;
353 xx = offset % vc->vc_cols;
354 yy = offset / vc->vc_cols;
357 start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy);
361 u16 attrib = scr_readw(p) & 0xff00;
364 while (xx < vc->vc_cols && count) {
365 if (attrib != (scr_readw(p) & 0xff00)) {
367 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
370 attrib = scr_readw(p) & 0xff00;
377 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
382 if (vc->vc_sw->con_getxy) {
384 start = vc->vc_sw->con_getxy(vc, start, NULL, NULL);
390 void update_region(struct vc_data *vc, unsigned long start, int count)
392 WARN_CONSOLE_UNLOCKED();
396 do_update_region(vc, start, count);
401 /* Structure of attributes is hardware-dependent */
403 static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink,
404 u8 _underline, u8 _reverse, u8 _italic)
406 if (vc->vc_sw->con_build_attr)
407 return vc->vc_sw->con_build_attr(vc, _color, _intensity,
408 _blink, _underline, _reverse, _italic);
410 #ifndef VT_BUF_VRAM_ONLY
412 * ++roman: I completely changed the attribute format for monochrome
413 * mode (!can_do_color). The formerly used MDA (monochrome display
414 * adapter) format didn't allow the combination of certain effects.
415 * Now the attribute is just a bit vector:
416 * Bit 0..1: intensity (0..2)
423 if (!vc->vc_can_do_color)
426 (_underline ? 4 : 0) |
430 a = (a & 0xF0) | vc->vc_itcolor;
432 a = (a & 0xf0) | vc->vc_ulcolor;
433 else if (_intensity == 0)
434 a = (a & 0xf0) | vc->vc_ulcolor;
436 a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77);
441 if (vc->vc_hi_font_mask == 0x100)
450 static void update_attr(struct vc_data *vc)
452 vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity,
453 vc->vc_blink, vc->vc_underline,
454 vc->vc_reverse ^ vc->vc_decscnm, vc->vc_italic);
455 vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm, 0) << 8) | ' ';
458 /* Note: inverting the screen twice should revert to the original state */
459 void invert_screen(struct vc_data *vc, int offset, int count, int viewed)
463 WARN_CONSOLE_UNLOCKED();
466 p = screenpos(vc, offset, viewed);
467 if (vc->vc_sw->con_invert_region)
468 vc->vc_sw->con_invert_region(vc, p, count);
469 #ifndef VT_BUF_VRAM_ONLY
475 if (!vc->vc_can_do_color) {
482 } else if (vc->vc_hi_font_mask == 0x100) {
485 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4);
492 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4);
500 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);
523 if (offset != -1 && offset >= 0 &&
524 offset < vc->vc_screenbuf_size) {
527 p = screenpos(vc, offset, 1);
529 new = old ^ vc->vc_complement_mask;
532 oldx = (offset >> 1) % vc->vc_cols;
533 oldy = (offset >> 1) / vc->vc_cols;
534 vc->vc_sw->con_putc(vc, new, oldy, oldx);
540 static void insert_char(struct vc_data *vc, unsigned int nr)
542 unsigned short *p = (unsigned short *) vc->vc_pos;
544 scr_memmovew(p + nr, p, (vc->vc_cols - vc->vc_x - nr) * 2);
545 scr_memsetw(p, vc->vc_video_erase_char, nr * 2);
546 vc->vc_need_wrap = 0;
548 do_update_region(vc, (unsigned long) p,
549 vc->vc_cols - vc->vc_x);
552 static void delete_char(struct vc_data *vc, unsigned int nr)
554 unsigned short *p = (unsigned short *) vc->vc_pos;
556 scr_memcpyw(p, p + nr, (vc->vc_cols - vc->vc_x - nr) * 2);
557 scr_memsetw(p + vc->vc_cols - vc->vc_x - nr, vc->vc_video_erase_char,
559 vc->vc_need_wrap = 0;
561 do_update_region(vc, (unsigned long) p,
562 vc->vc_cols - vc->vc_x);
565 static int softcursor_original;
567 static void add_softcursor(struct vc_data *vc)
569 int i = scr_readw((u16 *) vc->vc_pos);
570 u32 type = vc->vc_cursor_type;
572 if (! (type & 0x10)) return;
573 if (softcursor_original != -1) return;
574 softcursor_original = i;
575 i |= ((type >> 8) & 0xff00 );
576 i ^= ((type) & 0xff00 );
577 if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000;
578 if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700;
579 scr_writew(i, (u16 *) vc->vc_pos);
581 vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x);
584 static void hide_softcursor(struct vc_data *vc)
586 if (softcursor_original != -1) {
587 scr_writew(softcursor_original, (u16 *)vc->vc_pos);
589 vc->vc_sw->con_putc(vc, softcursor_original,
591 softcursor_original = -1;
595 static void hide_cursor(struct vc_data *vc)
599 vc->vc_sw->con_cursor(vc, CM_ERASE);
603 static void set_cursor(struct vc_data *vc)
605 if (!IS_FG(vc) || console_blanked ||
606 vc->vc_mode == KD_GRAPHICS)
612 if ((vc->vc_cursor_type & 0x0f) != 1)
613 vc->vc_sw->con_cursor(vc, CM_DRAW);
618 static void set_origin(struct vc_data *vc)
620 WARN_CONSOLE_UNLOCKED();
622 if (!CON_IS_VISIBLE(vc) ||
623 !vc->vc_sw->con_set_origin ||
624 !vc->vc_sw->con_set_origin(vc))
625 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
626 vc->vc_visible_origin = vc->vc_origin;
627 vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size;
628 vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x;
631 static inline void save_screen(struct vc_data *vc)
633 WARN_CONSOLE_UNLOCKED();
635 if (vc->vc_sw->con_save_screen)
636 vc->vc_sw->con_save_screen(vc);
640 * Redrawing of screen
643 void clear_buffer_attributes(struct vc_data *vc)
645 unsigned short *p = (unsigned short *)vc->vc_origin;
646 int count = vc->vc_screenbuf_size / 2;
647 int mask = vc->vc_hi_font_mask | 0xff;
649 for (; count > 0; count--, p++) {
650 scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p);
654 void redraw_screen(struct vc_data *vc, int is_switch)
658 WARN_CONSOLE_UNLOCKED();
662 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
667 struct vc_data *old_vc = vc_cons[fg_console].d;
670 if (!CON_IS_VISIBLE(vc))
672 *vc->vc_display_fg = vc;
673 fg_console = vc->vc_num;
675 if (!CON_IS_VISIBLE(old_vc)) {
680 sysfs_notify(&tty0dev->kobj, NULL, "active");
688 int old_was_color = vc->vc_can_do_color;
691 update = vc->vc_sw->con_switch(vc);
694 * If console changed from mono<->color, the best we can do
695 * is to clear the buffer attributes. As it currently stands,
696 * rebuilding new attributes from the old buffer is not doable
697 * without overly complex code.
699 if (old_was_color != vc->vc_can_do_color) {
701 clear_buffer_attributes(vc);
704 /* Forcibly update if we're panicing */
705 if ((update && vc->vc_mode != KD_GRAPHICS) ||
706 vt_force_oops_output(vc))
707 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
712 compute_shiftstate();
718 * Allocation, freeing and resizing of VTs.
721 int vc_cons_allocated(unsigned int i)
723 return (i < MAX_NR_CONSOLES && vc_cons[i].d);
726 static void visual_init(struct vc_data *vc, int num, int init)
728 /* ++Geert: vc->vc_sw->con_init determines console size */
730 module_put(vc->vc_sw->owner);
731 vc->vc_sw = conswitchp;
732 #ifndef VT_SINGLE_DRIVER
733 if (con_driver_map[num])
734 vc->vc_sw = con_driver_map[num];
736 __module_get(vc->vc_sw->owner);
738 vc->vc_display_fg = &master_display_fg;
739 vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir;
740 vc->vc_uni_pagedir = 0;
741 vc->vc_hi_font_mask = 0;
742 vc->vc_complement_mask = 0;
743 vc->vc_can_do_color = 0;
744 vc->vc_panic_force_write = false;
745 vc->vc_sw->con_init(vc, init);
746 if (!vc->vc_complement_mask)
747 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
748 vc->vc_s_complement_mask = vc->vc_complement_mask;
749 vc->vc_size_row = vc->vc_cols << 1;
750 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
753 int vc_allocate(unsigned int currcons) /* return 0 on success */
755 WARN_CONSOLE_UNLOCKED();
757 if (currcons >= MAX_NR_CONSOLES)
759 if (!vc_cons[currcons].d) {
761 struct vt_notifier_param param;
763 /* prevent users from taking too much memory */
764 if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE))
767 /* due to the granularity of kmalloc, we waste some memory here */
768 /* the alloc is done in two steps, to optimize the common situation
769 of a 25x80 console (structsize=216, screenbuf_size=4000) */
770 /* although the numbers above are not valid since long ago, the
771 point is still up-to-date and the comment still has its value
772 even if only as a historical artifact. --mj, July 1998 */
773 param.vc = vc = kzalloc(sizeof(struct vc_data), GFP_KERNEL);
776 vc_cons[currcons].d = vc;
777 tty_port_init(&vc->port);
778 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
779 visual_init(vc, currcons, 1);
780 if (!*vc->vc_uni_pagedir_loc)
781 con_set_default_unimap(vc);
782 vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL);
783 if (!vc->vc_screenbuf) {
785 vc_cons[currcons].d = NULL;
789 /* If no drivers have overridden us and the user didn't pass a
790 boot option, default to displaying the cursor */
791 if (global_cursor_default == -1)
792 global_cursor_default = 1;
794 vc_init(vc, vc->vc_rows, vc->vc_cols, 1);
795 vcs_make_sysfs(currcons);
796 atomic_notifier_call_chain(&vt_notifier_list, VT_ALLOCATE, ¶m);
801 static inline int resize_screen(struct vc_data *vc, int width, int height,
804 /* Resizes the resolution of the display adapater */
807 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize)
808 err = vc->vc_sw->con_resize(vc, width, height, user);
814 * Change # of rows and columns (0 means unchanged/the size of fg_console)
815 * [this is to be used together with some user program
816 * like resize that changes the hardware videomode]
818 #define VC_RESIZE_MAXCOL (32767)
819 #define VC_RESIZE_MAXROW (32767)
822 * vc_do_resize - resizing method for the tty
823 * @tty: tty being resized
824 * @real_tty: real tty (different to tty if a pty/tty pair)
825 * @vc: virtual console private data
829 * Resize a virtual console, clipping according to the actual constraints.
830 * If the caller passes a tty structure then update the termios winsize
831 * information and perform any necessary signal handling.
833 * Caller must hold the console semaphore. Takes the termios mutex and
834 * ctrl_lock of the tty IFF a tty is passed.
837 static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc,
838 unsigned int cols, unsigned int lines)
840 unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0;
842 unsigned int old_rows, old_row_size;
843 unsigned int new_cols, new_rows, new_row_size, new_screen_size;
845 unsigned short *newscreen;
847 WARN_CONSOLE_UNLOCKED();
852 user = vc->vc_resize_user;
853 vc->vc_resize_user = 0;
855 if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW)
858 new_cols = (cols ? cols : vc->vc_cols);
859 new_rows = (lines ? lines : vc->vc_rows);
860 new_row_size = new_cols << 1;
861 new_screen_size = new_row_size * new_rows;
863 if (new_cols == vc->vc_cols && new_rows == vc->vc_rows)
866 newscreen = kmalloc(new_screen_size, GFP_USER);
870 old_rows = vc->vc_rows;
871 old_row_size = vc->vc_size_row;
873 err = resize_screen(vc, new_cols, new_rows, user);
879 vc->vc_rows = new_rows;
880 vc->vc_cols = new_cols;
881 vc->vc_size_row = new_row_size;
882 vc->vc_screenbuf_size = new_screen_size;
884 rlth = min(old_row_size, new_row_size);
885 rrem = new_row_size - rlth;
886 old_origin = vc->vc_origin;
887 new_origin = (long) newscreen;
888 new_scr_end = new_origin + new_screen_size;
890 if (vc->vc_y > new_rows) {
891 if (old_rows - vc->vc_y < new_rows) {
893 * Cursor near the bottom, copy contents from the
896 old_origin += (old_rows - new_rows) * old_row_size;
899 * Cursor is in no man's land, copy 1/2 screenful
900 * from the top and bottom of cursor position
902 old_origin += (vc->vc_y - new_rows/2) * old_row_size;
906 end = old_origin + old_row_size * min(old_rows, new_rows);
910 while (old_origin < end) {
911 scr_memcpyw((unsigned short *) new_origin,
912 (unsigned short *) old_origin, rlth);
914 scr_memsetw((void *)(new_origin + rlth),
915 vc->vc_video_erase_char, rrem);
916 old_origin += old_row_size;
917 new_origin += new_row_size;
919 if (new_scr_end > new_origin)
920 scr_memsetw((void *)new_origin, vc->vc_video_erase_char,
921 new_scr_end - new_origin);
922 kfree(vc->vc_screenbuf);
923 vc->vc_screenbuf = newscreen;
924 vc->vc_screenbuf_size = new_screen_size;
927 /* do part of a reset_terminal() */
929 vc->vc_bottom = vc->vc_rows;
930 gotoxy(vc, vc->vc_x, vc->vc_y);
934 /* Rewrite the requested winsize data with the actual
937 memset(&ws, 0, sizeof(ws));
938 ws.ws_row = vc->vc_rows;
939 ws.ws_col = vc->vc_cols;
940 ws.ws_ypixel = vc->vc_scan_lines;
941 tty_do_resize(tty, &ws);
944 if (CON_IS_VISIBLE(vc))
946 vt_event_post(VT_EVENT_RESIZE, vc->vc_num, vc->vc_num);
951 * vc_resize - resize a VT
952 * @vc: virtual console
956 * Resize a virtual console as seen from the console end of things. We
957 * use the common vc_do_resize methods to update the structures. The
958 * caller must hold the console sem to protect console internals and
962 int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int rows)
964 return vc_do_resize(vc->port.tty, vc, cols, rows);
968 * vt_resize - resize a VT
969 * @tty: tty to resize
970 * @ws: winsize attributes
972 * Resize a virtual terminal. This is called by the tty layer as we
973 * register our own handler for resizing. The mutual helper does all
976 * Takes the console sem and the called methods then take the tty
977 * termios_mutex and the tty ctrl_lock in that order.
979 static int vt_resize(struct tty_struct *tty, struct winsize *ws)
981 struct vc_data *vc = tty->driver_data;
985 ret = vc_do_resize(tty, vc, ws->ws_col, ws->ws_row);
990 struct vc_data *vc_deallocate(unsigned int currcons)
992 struct vc_data *vc = NULL;
994 WARN_CONSOLE_UNLOCKED();
996 if (vc_cons_allocated(currcons)) {
997 struct vt_notifier_param param;
999 param.vc = vc = vc_cons[currcons].d;
1000 atomic_notifier_call_chain(&vt_notifier_list, VT_DEALLOCATE, ¶m);
1001 vcs_remove_sysfs(currcons);
1002 vc->vc_sw->con_deinit(vc);
1003 put_pid(vc->vt_pid);
1004 module_put(vc->vc_sw->owner);
1005 kfree(vc->vc_screenbuf);
1006 vc_cons[currcons].d = NULL;
1015 #define set_kbd(vc, x) vt_set_kbd_mode_bit((vc)->vc_num, (x))
1016 #define clr_kbd(vc, x) vt_clr_kbd_mode_bit((vc)->vc_num, (x))
1017 #define is_kbd(vc, x) vt_get_kbd_mode_bit((vc)->vc_num, (x))
1019 #define decarm VC_REPEAT
1020 #define decckm VC_CKMODE
1021 #define kbdapplic VC_APPLIC
1025 * this is what the terminal answers to a ESC-Z or csi0c query.
1027 #define VT100ID "\033[?1;2c"
1028 #define VT102ID "\033[?6c"
1030 unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7,
1031 8,12,10,14, 9,13,11,15 };
1033 /* the default colour table, for VGA+ colour systems */
1034 int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
1035 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
1036 int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
1037 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
1038 int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
1039 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
1041 module_param_array(default_red, int, NULL, S_IRUGO | S_IWUSR);
1042 module_param_array(default_grn, int, NULL, S_IRUGO | S_IWUSR);
1043 module_param_array(default_blu, int, NULL, S_IRUGO | S_IWUSR);
1046 * gotoxy() must verify all boundaries, because the arguments
1047 * might also be negative. If the given position is out of
1048 * bounds, the cursor is placed at the nearest margin.
1050 static void gotoxy(struct vc_data *vc, int new_x, int new_y)
1057 if (new_x >= vc->vc_cols)
1058 vc->vc_x = vc->vc_cols - 1;
1065 max_y = vc->vc_bottom;
1068 max_y = vc->vc_rows;
1072 else if (new_y >= max_y)
1073 vc->vc_y = max_y - 1;
1076 vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1);
1077 vc->vc_need_wrap = 0;
1080 /* for absolute user moves, when decom is set */
1081 static void gotoxay(struct vc_data *vc, int new_x, int new_y)
1083 gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y);
1086 void scrollback(struct vc_data *vc, int lines)
1089 lines = vc->vc_rows / 2;
1090 scrolldelta(-lines);
1093 void scrollfront(struct vc_data *vc, int lines)
1096 lines = vc->vc_rows / 2;
1100 static void lf(struct vc_data *vc)
1102 /* don't scroll if above bottom of scrolling region, or
1103 * if below scrolling region
1105 if (vc->vc_y + 1 == vc->vc_bottom)
1106 scrup(vc, vc->vc_top, vc->vc_bottom, 1);
1107 else if (vc->vc_y < vc->vc_rows - 1) {
1109 vc->vc_pos += vc->vc_size_row;
1111 vc->vc_need_wrap = 0;
1112 notify_write(vc, '\n');
1115 static void ri(struct vc_data *vc)
1117 /* don't scroll if below top of scrolling region, or
1118 * if above scrolling region
1120 if (vc->vc_y == vc->vc_top)
1121 scrdown(vc, vc->vc_top, vc->vc_bottom, 1);
1122 else if (vc->vc_y > 0) {
1124 vc->vc_pos -= vc->vc_size_row;
1126 vc->vc_need_wrap = 0;
1129 static inline void cr(struct vc_data *vc)
1131 vc->vc_pos -= vc->vc_x << 1;
1132 vc->vc_need_wrap = vc->vc_x = 0;
1133 notify_write(vc, '\r');
1136 static inline void bs(struct vc_data *vc)
1141 vc->vc_need_wrap = 0;
1142 notify_write(vc, '\b');
1146 static inline void del(struct vc_data *vc)
1151 static void csi_J(struct vc_data *vc, int vpar)
1154 unsigned short * start;
1157 case 0: /* erase from cursor to end of display */
1158 count = (vc->vc_scr_end - vc->vc_pos) >> 1;
1159 start = (unsigned short *)vc->vc_pos;
1161 case 1: /* erase from start to cursor */
1162 count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1;
1163 start = (unsigned short *)vc->vc_origin;
1165 case 3: /* erase scroll-back buffer (and whole display) */
1166 scr_memsetw(vc->vc_screenbuf, vc->vc_video_erase_char,
1167 vc->vc_screenbuf_size >> 1);
1169 if (CON_IS_VISIBLE(vc))
1172 case 2: /* erase whole display */
1173 count = vc->vc_cols * vc->vc_rows;
1174 start = (unsigned short *)vc->vc_origin;
1179 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1181 do_update_region(vc, (unsigned long) start, count);
1182 vc->vc_need_wrap = 0;
1185 static void csi_K(struct vc_data *vc, int vpar)
1188 unsigned short * start;
1191 case 0: /* erase from cursor to end of line */
1192 count = vc->vc_cols - vc->vc_x;
1193 start = (unsigned short *)vc->vc_pos;
1195 case 1: /* erase from start of line to cursor */
1196 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1197 count = vc->vc_x + 1;
1199 case 2: /* erase whole line */
1200 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1201 count = vc->vc_cols;
1206 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1207 vc->vc_need_wrap = 0;
1209 do_update_region(vc, (unsigned long) start, count);
1212 static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */
1218 count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar;
1220 scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count);
1222 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count);
1223 vc->vc_need_wrap = 0;
1226 static void default_attr(struct vc_data *vc)
1228 vc->vc_intensity = 1;
1230 vc->vc_underline = 0;
1233 vc->vc_color = vc->vc_def_color;
1236 /* console_lock is held */
1237 static void csi_m(struct vc_data *vc)
1241 for (i = 0; i <= vc->vc_npar; i++)
1242 switch (vc->vc_par[i]) {
1243 case 0: /* all attributes off */
1247 vc->vc_intensity = 2;
1250 vc->vc_intensity = 0;
1256 vc->vc_underline = 1;
1264 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1265 * Select primary font, don't display
1266 * control chars if defined, don't set
1269 vc->vc_translate = set_translate(vc->vc_charset == 0
1271 : vc->vc_G1_charset, vc);
1272 vc->vc_disp_ctrl = 0;
1273 vc->vc_toggle_meta = 0;
1275 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1276 * Select first alternate font, lets
1277 * chars < 32 be displayed as ROM chars.
1279 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1280 vc->vc_disp_ctrl = 1;
1281 vc->vc_toggle_meta = 0;
1283 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1284 * Select second alternate font, toggle
1285 * high bit before displaying as ROM char.
1287 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1288 vc->vc_disp_ctrl = 1;
1289 vc->vc_toggle_meta = 1;
1293 vc->vc_intensity = 1;
1299 vc->vc_underline = 0;
1307 case 38: /* ANSI X3.64-1979 (SCO-ish?)
1308 * Enables underscore, white foreground
1309 * with white underscore (Linux - use
1310 * default foreground).
1312 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1313 vc->vc_underline = 1;
1315 case 39: /* ANSI X3.64-1979 (SCO-ish?)
1316 * Disable underline option.
1317 * Reset colour to default? It did this
1320 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1321 vc->vc_underline = 0;
1324 vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f);
1327 if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37)
1328 vc->vc_color = color_table[vc->vc_par[i] - 30]
1329 | (vc->vc_color & 0xf0);
1330 else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47)
1331 vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4)
1332 | (vc->vc_color & 0x0f);
1338 static void respond_string(const char *p, struct tty_port *port)
1341 tty_insert_flip_char(port, *p, 0);
1344 tty_schedule_flip(port);
1347 static void cursor_report(struct vc_data *vc, struct tty_struct *tty)
1351 sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1);
1352 respond_string(buf, tty->port);
1355 static inline void status_report(struct tty_struct *tty)
1357 respond_string("\033[0n", tty->port); /* Terminal ok */
1360 static inline void respond_ID(struct tty_struct *tty)
1362 respond_string(VT102ID, tty->port);
1365 void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry)
1369 sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx),
1371 respond_string(buf, tty->port);
1374 /* invoked via ioctl(TIOCLINUX) and through set_selection */
1375 int mouse_reporting(void)
1377 return vc_cons[fg_console].d->vc_report_mouse;
1380 /* console_lock is held */
1381 static void set_mode(struct vc_data *vc, int on_off)
1385 for (i = 0; i <= vc->vc_npar; i++)
1387 switch(vc->vc_par[i]) { /* DEC private modes set/reset */
1388 case 1: /* Cursor keys send ^[Ox/^[[x */
1390 set_kbd(vc, decckm);
1392 clr_kbd(vc, decckm);
1394 case 3: /* 80/132 mode switch unimplemented */
1395 vc->vc_deccolm = on_off;
1397 vc_resize(deccolm ? 132 : 80, vc->vc_rows);
1398 /* this alone does not suffice; some user mode
1399 utility has to change the hardware regs */
1402 case 5: /* Inverted screen on/off */
1403 if (vc->vc_decscnm != on_off) {
1404 vc->vc_decscnm = on_off;
1405 invert_screen(vc, 0, vc->vc_screenbuf_size, 0);
1409 case 6: /* Origin relative/absolute */
1410 vc->vc_decom = on_off;
1413 case 7: /* Autowrap on/off */
1414 vc->vc_decawm = on_off;
1416 case 8: /* Autorepeat on/off */
1418 set_kbd(vc, decarm);
1420 clr_kbd(vc, decarm);
1423 vc->vc_report_mouse = on_off ? 1 : 0;
1425 case 25: /* Cursor on/off */
1426 vc->vc_deccm = on_off;
1429 vc->vc_report_mouse = on_off ? 2 : 0;
1433 switch(vc->vc_par[i]) { /* ANSI modes set/reset */
1434 case 3: /* Monitor (display ctrls) */
1435 vc->vc_disp_ctrl = on_off;
1437 case 4: /* Insert Mode on/off */
1438 vc->vc_decim = on_off;
1440 case 20: /* Lf, Enter == CrLf/Lf */
1450 /* console_lock is held */
1451 static void setterm_command(struct vc_data *vc)
1453 switch(vc->vc_par[0]) {
1454 case 1: /* set color for underline mode */
1455 if (vc->vc_can_do_color &&
1456 vc->vc_par[1] < 16) {
1457 vc->vc_ulcolor = color_table[vc->vc_par[1]];
1458 if (vc->vc_underline)
1462 case 2: /* set color for half intensity mode */
1463 if (vc->vc_can_do_color &&
1464 vc->vc_par[1] < 16) {
1465 vc->vc_halfcolor = color_table[vc->vc_par[1]];
1466 if (vc->vc_intensity == 0)
1470 case 8: /* store colors as defaults */
1471 vc->vc_def_color = vc->vc_attr;
1472 if (vc->vc_hi_font_mask == 0x100)
1473 vc->vc_def_color >>= 1;
1477 case 9: /* set blanking interval */
1478 blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60;
1479 poke_blanked_console();
1481 case 10: /* set bell frequency in Hz */
1482 if (vc->vc_npar >= 1)
1483 vc->vc_bell_pitch = vc->vc_par[1];
1485 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1487 case 11: /* set bell duration in msec */
1488 if (vc->vc_npar >= 1)
1489 vc->vc_bell_duration = (vc->vc_par[1] < 2000) ?
1490 vc->vc_par[1] * HZ / 1000 : 0;
1492 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1494 case 12: /* bring specified console to the front */
1495 if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1))
1496 set_console(vc->vc_par[1] - 1);
1498 case 13: /* unblank the screen */
1499 poke_blanked_console();
1501 case 14: /* set vesa powerdown interval */
1502 vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1504 case 15: /* activate the previous console */
1505 set_console(last_console);
1510 /* console_lock is held */
1511 static void csi_at(struct vc_data *vc, unsigned int nr)
1513 if (nr > vc->vc_cols - vc->vc_x)
1514 nr = vc->vc_cols - vc->vc_x;
1517 insert_char(vc, nr);
1520 /* console_lock is held */
1521 static void csi_L(struct vc_data *vc, unsigned int nr)
1523 if (nr > vc->vc_rows - vc->vc_y)
1524 nr = vc->vc_rows - vc->vc_y;
1527 scrdown(vc, vc->vc_y, vc->vc_bottom, nr);
1528 vc->vc_need_wrap = 0;
1531 /* console_lock is held */
1532 static void csi_P(struct vc_data *vc, unsigned int nr)
1534 if (nr > vc->vc_cols - vc->vc_x)
1535 nr = vc->vc_cols - vc->vc_x;
1538 delete_char(vc, nr);
1541 /* console_lock is held */
1542 static void csi_M(struct vc_data *vc, unsigned int nr)
1544 if (nr > vc->vc_rows - vc->vc_y)
1545 nr = vc->vc_rows - vc->vc_y;
1548 scrup(vc, vc->vc_y, vc->vc_bottom, nr);
1549 vc->vc_need_wrap = 0;
1552 /* console_lock is held (except via vc_init->reset_terminal */
1553 static void save_cur(struct vc_data *vc)
1555 vc->vc_saved_x = vc->vc_x;
1556 vc->vc_saved_y = vc->vc_y;
1557 vc->vc_s_intensity = vc->vc_intensity;
1558 vc->vc_s_italic = vc->vc_italic;
1559 vc->vc_s_underline = vc->vc_underline;
1560 vc->vc_s_blink = vc->vc_blink;
1561 vc->vc_s_reverse = vc->vc_reverse;
1562 vc->vc_s_charset = vc->vc_charset;
1563 vc->vc_s_color = vc->vc_color;
1564 vc->vc_saved_G0 = vc->vc_G0_charset;
1565 vc->vc_saved_G1 = vc->vc_G1_charset;
1568 /* console_lock is held */
1569 static void restore_cur(struct vc_data *vc)
1571 gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y);
1572 vc->vc_intensity = vc->vc_s_intensity;
1573 vc->vc_italic = vc->vc_s_italic;
1574 vc->vc_underline = vc->vc_s_underline;
1575 vc->vc_blink = vc->vc_s_blink;
1576 vc->vc_reverse = vc->vc_s_reverse;
1577 vc->vc_charset = vc->vc_s_charset;
1578 vc->vc_color = vc->vc_s_color;
1579 vc->vc_G0_charset = vc->vc_saved_G0;
1580 vc->vc_G1_charset = vc->vc_saved_G1;
1581 vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc);
1583 vc->vc_need_wrap = 0;
1586 enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey,
1587 EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd,
1590 /* console_lock is held (except via vc_init()) */
1591 static void reset_terminal(struct vc_data *vc, int do_clear)
1594 vc->vc_bottom = vc->vc_rows;
1595 vc->vc_state = ESnormal;
1597 vc->vc_translate = set_translate(LAT1_MAP, vc);
1598 vc->vc_G0_charset = LAT1_MAP;
1599 vc->vc_G1_charset = GRAF_MAP;
1601 vc->vc_need_wrap = 0;
1602 vc->vc_report_mouse = 0;
1603 vc->vc_utf = default_utf8;
1604 vc->vc_utf_count = 0;
1606 vc->vc_disp_ctrl = 0;
1607 vc->vc_toggle_meta = 0;
1612 vc->vc_deccm = global_cursor_default;
1615 vt_reset_keyboard(vc->vc_num);
1617 vc->vc_cursor_type = cur_default;
1618 vc->vc_complement_mask = vc->vc_s_complement_mask;
1623 vc->vc_tab_stop[0] = 0x01010100;
1624 vc->vc_tab_stop[1] =
1625 vc->vc_tab_stop[2] =
1626 vc->vc_tab_stop[3] =
1627 vc->vc_tab_stop[4] =
1628 vc->vc_tab_stop[5] =
1629 vc->vc_tab_stop[6] =
1630 vc->vc_tab_stop[7] = 0x01010101;
1632 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1633 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1641 /* console_lock is held */
1642 static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
1645 * Control characters can be used in the _middle_
1646 * of an escape sequence.
1652 if (vc->vc_bell_duration)
1653 kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration);
1659 vc->vc_pos -= (vc->vc_x << 1);
1660 while (vc->vc_x < vc->vc_cols - 1) {
1662 if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31)))
1665 vc->vc_pos += (vc->vc_x << 1);
1666 notify_write(vc, '\t');
1668 case 10: case 11: case 12:
1670 if (!is_kbd(vc, lnm))
1677 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1678 vc->vc_disp_ctrl = 1;
1682 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1683 vc->vc_disp_ctrl = 0;
1686 vc->vc_state = ESnormal;
1689 vc->vc_state = ESesc;
1695 vc->vc_state = ESsquare;
1698 switch(vc->vc_state) {
1700 vc->vc_state = ESnormal;
1703 vc->vc_state = ESsquare;
1706 vc->vc_state = ESnonstd;
1709 vc->vc_state = ESpercent;
1722 vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31));
1734 vc->vc_state = ESsetG0;
1737 vc->vc_state = ESsetG1;
1740 vc->vc_state = EShash;
1743 reset_terminal(vc, 1);
1745 case '>': /* Numeric keypad */
1746 clr_kbd(vc, kbdapplic);
1748 case '=': /* Appl. keypad */
1749 set_kbd(vc, kbdapplic);
1754 if (c=='P') { /* palette escape sequence */
1755 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1756 vc->vc_par[vc->vc_npar] = 0;
1758 vc->vc_state = ESpalette;
1760 } else if (c=='R') { /* reset palette */
1762 vc->vc_state = ESnormal;
1764 vc->vc_state = ESnormal;
1768 vc->vc_par[vc->vc_npar++] = hex_to_bin(c);
1769 if (vc->vc_npar == 7) {
1770 int i = vc->vc_par[0] * 3, j = 1;
1771 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1772 vc->vc_palette[i++] += vc->vc_par[j++];
1773 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1774 vc->vc_palette[i++] += vc->vc_par[j++];
1775 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1776 vc->vc_palette[i] += vc->vc_par[j];
1778 vc->vc_state = ESnormal;
1781 vc->vc_state = ESnormal;
1784 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1785 vc->vc_par[vc->vc_npar] = 0;
1787 vc->vc_state = ESgetpars;
1788 if (c == '[') { /* Function key */
1789 vc->vc_state=ESfunckey;
1792 vc->vc_ques = (c == '?');
1796 if (c == ';' && vc->vc_npar < NPAR - 1) {
1799 } else if (c>='0' && c<='9') {
1800 vc->vc_par[vc->vc_npar] *= 10;
1801 vc->vc_par[vc->vc_npar] += c - '0';
1804 vc->vc_state = ESgotpars;
1806 vc->vc_state = ESnormal;
1817 vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16);
1819 vc->vc_cursor_type = cur_default;
1827 vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1];
1829 vc->vc_complement_mask = vc->vc_s_complement_mask;
1835 if (vc->vc_par[0] == 5)
1837 else if (vc->vc_par[0] == 6)
1838 cursor_report(vc, tty);
1850 gotoxy(vc, vc->vc_par[0], vc->vc_y);
1855 gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]);
1860 gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]);
1865 gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y);
1870 gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y);
1875 gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]);
1880 gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]);
1885 gotoxay(vc, vc->vc_x ,vc->vc_par[0]);
1892 gotoxay(vc, vc->vc_par[1], vc->vc_par[0]);
1895 csi_J(vc, vc->vc_par[0]);
1898 csi_K(vc, vc->vc_par[0]);
1901 csi_L(vc, vc->vc_par[0]);
1904 csi_M(vc, vc->vc_par[0]);
1907 csi_P(vc, vc->vc_par[0]);
1915 vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31));
1916 else if (vc->vc_par[0] == 3) {
1917 vc->vc_tab_stop[0] =
1918 vc->vc_tab_stop[1] =
1919 vc->vc_tab_stop[2] =
1920 vc->vc_tab_stop[3] =
1921 vc->vc_tab_stop[4] =
1922 vc->vc_tab_stop[5] =
1923 vc->vc_tab_stop[6] =
1924 vc->vc_tab_stop[7] = 0;
1930 case 'q': /* DECLL - but only 3 leds */
1931 /* map 0,1,2,3 to 0,1,2,4 */
1932 if (vc->vc_par[0] < 4)
1933 vt_set_led_state(vc->vc_num,
1934 (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4);
1940 vc->vc_par[1] = vc->vc_rows;
1941 /* Minimum allowed region is 2 lines */
1942 if (vc->vc_par[0] < vc->vc_par[1] &&
1943 vc->vc_par[1] <= vc->vc_rows) {
1944 vc->vc_top = vc->vc_par[0] - 1;
1945 vc->vc_bottom = vc->vc_par[1];
1956 csi_X(vc, vc->vc_par[0]);
1959 csi_at(vc, vc->vc_par[0]);
1961 case ']': /* setterm functions */
1962 setterm_command(vc);
1967 vc->vc_state = ESnormal;
1969 case '@': /* defined in ISO 2022 */
1972 case 'G': /* prelim official escape code */
1973 case '8': /* retained for compatibility */
1979 vc->vc_state = ESnormal;
1982 vc->vc_state = ESnormal;
1984 /* DEC screen alignment test. kludge :-) */
1985 vc->vc_video_erase_char =
1986 (vc->vc_video_erase_char & 0xff00) | 'E';
1988 vc->vc_video_erase_char =
1989 (vc->vc_video_erase_char & 0xff00) | ' ';
1990 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
1995 vc->vc_G0_charset = GRAF_MAP;
1997 vc->vc_G0_charset = LAT1_MAP;
1999 vc->vc_G0_charset = IBMPC_MAP;
2001 vc->vc_G0_charset = USER_MAP;
2002 if (vc->vc_charset == 0)
2003 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
2004 vc->vc_state = ESnormal;
2008 vc->vc_G1_charset = GRAF_MAP;
2010 vc->vc_G1_charset = LAT1_MAP;
2012 vc->vc_G1_charset = IBMPC_MAP;
2014 vc->vc_G1_charset = USER_MAP;
2015 if (vc->vc_charset == 1)
2016 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
2017 vc->vc_state = ESnormal;
2020 vc->vc_state = ESnormal;
2024 /* is_double_width() is based on the wcwidth() implementation by
2025 * Markus Kuhn -- 2007-05-26 (Unicode 5.0)
2026 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
2033 static int bisearch(uint32_t ucs, const struct interval *table, int max)
2038 if (ucs < table[0].first || ucs > table[max].last)
2040 while (max >= min) {
2041 mid = (min + max) / 2;
2042 if (ucs > table[mid].last)
2044 else if (ucs < table[mid].first)
2052 static int is_double_width(uint32_t ucs)
2054 static const struct interval double_width[] = {
2055 { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E },
2056 { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF },
2057 { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 },
2058 { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD }
2060 return bisearch(ucs, double_width, ARRAY_SIZE(double_width) - 1);
2063 /* acquires console_lock */
2064 static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2066 #ifdef VT_BUF_VRAM_ONLY
2067 #define FLUSH do { } while(0);
2069 #define FLUSH if (draw_x >= 0) { \
2070 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
2075 int c, tc, ok, n = 0, draw_x = -1;
2076 unsigned int currcons;
2077 unsigned long draw_from = 0, draw_to = 0;
2079 unsigned char vc_attr;
2080 struct vt_notifier_param param;
2084 u16 himask, charmask;
2092 vc = tty->driver_data;
2094 printk(KERN_ERR "vt: argh, driver_data is NULL !\n");
2099 currcons = vc->vc_num;
2100 if (!vc_cons_allocated(currcons)) {
2101 /* could this happen? */
2102 pr_warn_once("con_write: tty %d not allocated\n", currcons+1);
2107 himask = vc->vc_hi_font_mask;
2108 charmask = himask ? 0x1ff : 0xff;
2110 /* undraw cursor first */
2116 while (!tty->stopped && count) {
2126 /* Do no translation at all in control states */
2127 if (vc->vc_state != ESnormal) {
2129 } else if (vc->vc_utf && !vc->vc_disp_ctrl) {
2130 /* Combine UTF-8 into Unicode in vc_utf_char.
2131 * vc_utf_count is the number of continuation bytes still
2132 * expected to arrive.
2133 * vc_npar is the number of continuation bytes arrived so
2137 if ((c & 0xc0) == 0x80) {
2138 /* Continuation byte received */
2139 static const uint32_t utf8_length_changes[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff };
2140 if (vc->vc_utf_count) {
2141 vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f);
2143 if (--vc->vc_utf_count) {
2144 /* Still need some bytes */
2147 /* Got a whole character */
2148 c = vc->vc_utf_char;
2149 /* Reject overlong sequences */
2150 if (c <= utf8_length_changes[vc->vc_npar - 1] ||
2151 c > utf8_length_changes[vc->vc_npar])
2154 /* Unexpected continuation byte */
2155 vc->vc_utf_count = 0;
2159 /* Single ASCII byte or first byte of a sequence received */
2160 if (vc->vc_utf_count) {
2161 /* Continuation byte expected */
2163 vc->vc_utf_count = 0;
2165 } else if (c > 0x7f) {
2166 /* First byte of a multibyte sequence received */
2168 if ((c & 0xe0) == 0xc0) {
2169 vc->vc_utf_count = 1;
2170 vc->vc_utf_char = (c & 0x1f);
2171 } else if ((c & 0xf0) == 0xe0) {
2172 vc->vc_utf_count = 2;
2173 vc->vc_utf_char = (c & 0x0f);
2174 } else if ((c & 0xf8) == 0xf0) {
2175 vc->vc_utf_count = 3;
2176 vc->vc_utf_char = (c & 0x07);
2177 } else if ((c & 0xfc) == 0xf8) {
2178 vc->vc_utf_count = 4;
2179 vc->vc_utf_char = (c & 0x03);
2180 } else if ((c & 0xfe) == 0xfc) {
2181 vc->vc_utf_count = 5;
2182 vc->vc_utf_char = (c & 0x01);
2184 /* 254 and 255 are invalid */
2187 if (vc->vc_utf_count) {
2188 /* Still need some bytes */
2192 /* Nothing to do if an ASCII byte was received */
2194 /* End of UTF-8 decoding. */
2195 /* c is the received character, or U+FFFD for invalid sequences. */
2196 /* Replace invalid Unicode code points with U+FFFD too */
2197 if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff)
2200 } else { /* no utf or alternate charset mode */
2201 tc = vc_translate(vc, c);
2205 if (atomic_notifier_call_chain(&vt_notifier_list, VT_PREWRITE,
2206 ¶m) == NOTIFY_STOP)
2209 /* If the original code was a control character we
2210 * only allow a glyph to be displayed if the code is
2211 * not normally used (such as for cursor movement) or
2212 * if the disp_ctrl mode has been explicitly enabled.
2213 * Certain characters (as given by the CTRL_ALWAYS
2214 * bitmap) are always displayed as control characters,
2215 * as the console would be pretty useless without
2216 * them; to display an arbitrary font position use the
2217 * direct-to-font zone in UTF-8 mode.
2219 ok = tc && (c >= 32 ||
2220 !(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 :
2221 vc->vc_utf || ((CTRL_ACTION >> c) & 1)))
2222 && (c != 127 || vc->vc_disp_ctrl)
2225 if (vc->vc_state == ESnormal && ok) {
2226 if (vc->vc_utf && !vc->vc_disp_ctrl) {
2227 if (is_double_width(c))
2230 /* Now try to find out how to display it */
2231 tc = conv_uni_to_pc(vc, tc);
2232 if (tc & ~charmask) {
2233 if (tc == -1 || tc == -2) {
2234 continue; /* nothing to display */
2236 /* Glyph not found */
2237 if ((!(vc->vc_utf && !vc->vc_disp_ctrl) || c < 128) && !(c & ~charmask)) {
2238 /* In legacy mode use the glyph we get by a 1:1 mapping.
2239 This would make absolutely no sense with Unicode in mind,
2240 but do this for ASCII characters since a font may lack
2241 Unicode mapping info and we don't want to end up with
2242 having question marks only. */
2245 /* Display U+FFFD. If it's not found, display an inverse question mark. */
2246 tc = conv_uni_to_pc(vc, 0xfffd);
2249 tc = conv_uni_to_pc(vc, '?');
2250 if (tc < 0) tc = '?';
2256 vc_attr = vc->vc_attr;
2258 /* invert vc_attr */
2259 if (!vc->vc_can_do_color) {
2260 vc_attr = (vc->vc_attr) ^ 0x08;
2261 } else if (vc->vc_hi_font_mask == 0x100) {
2262 vc_attr = ((vc->vc_attr) & 0x11) | (((vc->vc_attr) & 0xe0) >> 4) | (((vc->vc_attr) & 0x0e) << 4);
2264 vc_attr = ((vc->vc_attr) & 0x88) | (((vc->vc_attr) & 0x70) >> 4) | (((vc->vc_attr) & 0x07) << 4);
2270 if (vc->vc_need_wrap || vc->vc_decim)
2272 if (vc->vc_need_wrap) {
2279 ((vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) :
2280 (vc_attr << 8) + tc,
2281 (u16 *) vc->vc_pos);
2282 if (DO_UPDATE(vc) && draw_x < 0) {
2284 draw_from = vc->vc_pos;
2286 if (vc->vc_x == vc->vc_cols - 1) {
2287 vc->vc_need_wrap = vc->vc_decawm;
2288 draw_to = vc->vc_pos + 2;
2291 draw_to = (vc->vc_pos += 2);
2294 if (!--width) break;
2296 tc = conv_uni_to_pc(vc, ' '); /* A space is printed in the second column */
2297 if (tc < 0) tc = ' ';
2299 notify_write(vc, c);
2310 goto rescan_last_byte;
2315 do_con_trol(tty, vc, orig);
2318 console_conditional_schedule();
2326 * This is the console switching callback.
2328 * Doing console switching in a process context allows
2329 * us to do the switches asynchronously (needed when we want
2330 * to switch due to a keyboard interrupt). Synchronization
2331 * with other console code and prevention of re-entrancy is
2332 * ensured with console_lock.
2334 static void console_callback(struct work_struct *ignored)
2338 if (want_console >= 0) {
2339 if (want_console != fg_console &&
2340 vc_cons_allocated(want_console)) {
2341 hide_cursor(vc_cons[fg_console].d);
2342 change_console(vc_cons[want_console].d);
2343 /* we only changed when the console had already
2344 been allocated - a new console is not created
2345 in an interrupt routine */
2349 if (do_poke_blanked_console) { /* do not unblank for a LED change */
2350 do_poke_blanked_console = 0;
2351 poke_blanked_console();
2353 if (scrollback_delta) {
2354 struct vc_data *vc = vc_cons[fg_console].d;
2356 if (vc->vc_mode == KD_TEXT)
2357 vc->vc_sw->con_scrolldelta(vc, scrollback_delta);
2358 scrollback_delta = 0;
2360 if (blank_timer_expired) {
2362 blank_timer_expired = 0;
2364 notify_update(vc_cons[fg_console].d);
2369 int set_console(int nr)
2371 struct vc_data *vc = vc_cons[fg_console].d;
2373 if (!vc_cons_allocated(nr) || vt_dont_switch ||
2374 (vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) {
2377 * Console switch will fail in console_callback() or
2378 * change_console() so there is no point scheduling
2381 * Existing set_console() users don't check the return
2382 * value so this shouldn't break anything
2388 schedule_console_callback();
2393 struct tty_driver *console_driver;
2395 #ifdef CONFIG_VT_CONSOLE
2398 * vt_kmsg_redirect() - Sets/gets the kernel message console
2399 * @new: The new virtual terminal number or -1 if the console should stay
2402 * By default, the kernel messages are always printed on the current virtual
2403 * console. However, the user may modify that default with the
2404 * TIOCL_SETKMSGREDIRECT ioctl call.
2406 * This function sets the kernel message console to be @new. It returns the old
2407 * virtual console number. The virtual terminal number 0 (both as parameter and
2408 * return value) means no redirection (i.e. always printed on the currently
2411 * The parameter -1 means that only the current console is returned, but the
2412 * value is not modified. You may use the macro vt_get_kmsg_redirect() in that
2413 * case to make the code more understandable.
2415 * When the kernel is compiled without CONFIG_VT_CONSOLE, this function ignores
2416 * the parameter and always returns 0.
2418 int vt_kmsg_redirect(int new)
2420 static int kmsg_con;
2423 return xchg(&kmsg_con, new);
2429 * Console on virtual terminal
2431 * The console must be locked when we get here.
2434 static void vt_console_print(struct console *co, const char *b, unsigned count)
2436 struct vc_data *vc = vc_cons[fg_console].d;
2438 static DEFINE_SPINLOCK(printing_lock);
2439 const ushort *start;
2444 /* console busy or not yet initialized */
2447 if (!spin_trylock(&printing_lock))
2450 kmsg_console = vt_get_kmsg_redirect();
2451 if (kmsg_console && vc_cons_allocated(kmsg_console - 1))
2452 vc = vc_cons[kmsg_console - 1].d;
2454 /* read `x' only after setting currcons properly (otherwise
2455 the `x' macro will read the x of the foreground console). */
2458 if (!vc_cons_allocated(fg_console)) {
2460 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2464 if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc))
2467 /* undraw cursor first */
2471 start = (ushort *)vc->vc_pos;
2473 /* Contrived structure to try to emulate original need_wrap behaviour
2474 * Problems caused when we have need_wrap set on '\n' character */
2477 if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) {
2479 if (CON_IS_VISIBLE(vc))
2480 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2482 if (vc->vc_need_wrap)
2486 if (c == 8) { /* backspace */
2488 start = (ushort *)vc->vc_pos;
2495 start = (ushort *)vc->vc_pos;
2497 if (c == 10 || c == 13)
2500 scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos);
2501 notify_write(vc, c);
2503 if (myx == vc->vc_cols - 1) {
2504 vc->vc_need_wrap = 1;
2511 if (CON_IS_VISIBLE(vc))
2512 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2514 if (vc->vc_x == vc->vc_cols) {
2516 vc->vc_need_wrap = 1;
2523 spin_unlock(&printing_lock);
2526 static struct tty_driver *vt_console_device(struct console *c, int *index)
2528 *index = c->index ? c->index-1 : fg_console;
2529 return console_driver;
2532 static struct console vt_console_driver = {
2534 .write = vt_console_print,
2535 .device = vt_console_device,
2536 .unblank = unblank_screen,
2537 .flags = CON_PRINTBUFFER,
2543 * Handling of Linux-specific VC ioctls
2547 * Generally a bit racy with respect to console_lock();.
2549 * There are some functions which don't need it.
2551 * There are some functions which can sleep for arbitrary periods
2552 * (paste_selection) but we don't need the lock there anyway.
2554 * set_selection has locking, and definitely needs it
2557 int tioclinux(struct tty_struct *tty, unsigned long arg)
2560 char __user *p = (char __user *)arg;
2564 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN))
2566 if (get_user(type, p))
2574 ret = set_selection((struct tiocl_selection __user *)(p+1), tty);
2577 case TIOCL_PASTESEL:
2578 ret = paste_selection(tty);
2580 case TIOCL_UNBLANKSCREEN:
2585 case TIOCL_SELLOADLUT:
2587 ret = sel_loadlut(p);
2590 case TIOCL_GETSHIFTSTATE:
2593 * Make it possible to react to Shift+Mousebutton.
2594 * Note that 'shift_state' is an undocumented
2595 * kernel-internal variable; programs not closely
2596 * related to the kernel should not use this.
2598 data = vt_get_shift_state();
2599 ret = __put_user(data, p);
2601 case TIOCL_GETMOUSEREPORTING:
2602 console_lock(); /* May be overkill */
2603 data = mouse_reporting();
2605 ret = __put_user(data, p);
2607 case TIOCL_SETVESABLANK:
2609 ret = set_vesa_blanking(p);
2612 case TIOCL_GETKMSGREDIRECT:
2613 data = vt_get_kmsg_redirect();
2614 ret = __put_user(data, p);
2616 case TIOCL_SETKMSGREDIRECT:
2617 if (!capable(CAP_SYS_ADMIN)) {
2620 if (get_user(data, p+1))
2623 vt_kmsg_redirect(data);
2626 case TIOCL_GETFGCONSOLE:
2627 /* No locking needed as this is a transiently
2628 correct return anyway if the caller hasn't
2629 disabled switching */
2632 case TIOCL_SCROLLCONSOLE:
2633 if (get_user(lines, (s32 __user *)(p+4))) {
2636 /* Need the console lock here. Note that lots
2637 of other calls need fixing before the lock
2638 is actually useful ! */
2640 scrollfront(vc_cons[fg_console].d, lines);
2645 case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
2651 case TIOCL_BLANKEDSCREEN:
2652 ret = console_blanked;
2662 * /dev/ttyN handling
2665 static int con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2669 retval = do_con_write(tty, buf, count);
2670 con_flush_chars(tty);
2675 static int con_put_char(struct tty_struct *tty, unsigned char ch)
2678 return 0; /* n_r3964 calls put_char() from interrupt context */
2679 return do_con_write(tty, &ch, 1);
2682 static int con_write_room(struct tty_struct *tty)
2686 return 32768; /* No limit, really; we're not buffering */
2689 static int con_chars_in_buffer(struct tty_struct *tty)
2691 return 0; /* we're not buffering */
2695 * con_throttle and con_unthrottle are only used for
2696 * paste_selection(), which has to stuff in a large number of
2699 static void con_throttle(struct tty_struct *tty)
2703 static void con_unthrottle(struct tty_struct *tty)
2705 struct vc_data *vc = tty->driver_data;
2707 wake_up_interruptible(&vc->paste_wait);
2711 * Turn the Scroll-Lock LED on when the tty is stopped
2713 static void con_stop(struct tty_struct *tty)
2718 console_num = tty->index;
2719 if (!vc_cons_allocated(console_num))
2721 vt_kbd_con_stop(console_num);
2725 * Turn the Scroll-Lock LED off when the console is started
2727 static void con_start(struct tty_struct *tty)
2732 console_num = tty->index;
2733 if (!vc_cons_allocated(console_num))
2735 vt_kbd_con_start(console_num);
2738 static void con_flush_chars(struct tty_struct *tty)
2742 if (in_interrupt()) /* from flush_to_ldisc */
2745 /* if we race with con_close(), vt may be null */
2747 vc = tty->driver_data;
2754 * Allocate the console screen memory.
2756 static int con_install(struct tty_driver *driver, struct tty_struct *tty)
2758 unsigned int currcons = tty->index;
2763 ret = vc_allocate(currcons);
2767 vc = vc_cons[currcons].d;
2769 /* Still being freed */
2775 ret = tty_port_install(&vc->port, driver, tty);
2779 tty->driver_data = vc;
2782 if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
2783 tty->winsize.ws_row = vc_cons[currcons].d->vc_rows;
2784 tty->winsize.ws_col = vc_cons[currcons].d->vc_cols;
2787 tty->termios.c_iflag |= IUTF8;
2789 tty->termios.c_iflag &= ~IUTF8;
2795 static int con_open(struct tty_struct *tty, struct file *filp)
2797 /* everything done in install */
2802 static void con_close(struct tty_struct *tty, struct file *filp)
2804 /* Nothing to do - we defer to shutdown */
2807 static void con_shutdown(struct tty_struct *tty)
2809 struct vc_data *vc = tty->driver_data;
2812 vc->port.tty = NULL;
2816 static int default_italic_color = 2; // green (ASCII)
2817 static int default_underline_color = 3; // cyan (ASCII)
2818 module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR);
2819 module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR);
2821 static void vc_init(struct vc_data *vc, unsigned int rows,
2822 unsigned int cols, int do_clear)
2828 vc->vc_size_row = cols << 1;
2829 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
2832 vc->vc_pos = vc->vc_origin;
2834 for (j=k=0; j<16; j++) {
2835 vc->vc_palette[k++] = default_red[j] ;
2836 vc->vc_palette[k++] = default_grn[j] ;
2837 vc->vc_palette[k++] = default_blu[j] ;
2839 vc->vc_def_color = 0x07; /* white */
2840 vc->vc_ulcolor = default_underline_color;
2841 vc->vc_itcolor = default_italic_color;
2842 vc->vc_halfcolor = 0x08; /* grey */
2843 init_waitqueue_head(&vc->paste_wait);
2844 reset_terminal(vc, do_clear);
2848 * This routine initializes console interrupts, and does nothing
2849 * else. If you want the screen to clear, call tty_write with
2850 * the appropriate escape-sequence.
2853 static int __init con_init(void)
2855 const char *display_desc = NULL;
2857 unsigned int currcons = 0, i;
2862 display_desc = conswitchp->con_startup();
2863 if (!display_desc) {
2869 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2870 struct con_driver *con_driver = ®istered_con_driver[i];
2872 if (con_driver->con == NULL) {
2873 con_driver->con = conswitchp;
2874 con_driver->desc = display_desc;
2875 con_driver->flag = CON_DRIVER_FLAG_INIT;
2876 con_driver->first = 0;
2877 con_driver->last = MAX_NR_CONSOLES - 1;
2882 for (i = 0; i < MAX_NR_CONSOLES; i++)
2883 con_driver_map[i] = conswitchp;
2885 if (blankinterval) {
2886 blank_state = blank_normal_wait;
2887 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
2890 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) {
2891 vc_cons[currcons].d = vc = kzalloc(sizeof(struct vc_data), GFP_NOWAIT);
2892 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
2893 tty_port_init(&vc->port);
2894 visual_init(vc, currcons, 1);
2895 vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_NOWAIT);
2896 vc_init(vc, vc->vc_rows, vc->vc_cols,
2897 currcons || !vc->vc_sw->con_save_screen);
2899 currcons = fg_console = 0;
2900 master_display_fg = vc = vc_cons[currcons].d;
2903 gotoxy(vc, vc->vc_x, vc->vc_y);
2906 pr_info("Console: %s %s %dx%d\n",
2907 vc->vc_can_do_color ? "colour" : "mono",
2908 display_desc, vc->vc_cols, vc->vc_rows);
2913 #ifdef CONFIG_VT_CONSOLE
2914 register_console(&vt_console_driver);
2918 console_initcall(con_init);
2920 static const struct tty_operations con_ops = {
2921 .install = con_install,
2925 .write_room = con_write_room,
2926 .put_char = con_put_char,
2927 .flush_chars = con_flush_chars,
2928 .chars_in_buffer = con_chars_in_buffer,
2930 #ifdef CONFIG_COMPAT
2931 .compat_ioctl = vt_compat_ioctl,
2935 .throttle = con_throttle,
2936 .unthrottle = con_unthrottle,
2937 .resize = vt_resize,
2938 .shutdown = con_shutdown
2941 static struct cdev vc0_cdev;
2943 static ssize_t show_tty_active(struct device *dev,
2944 struct device_attribute *attr, char *buf)
2946 return sprintf(buf, "tty%d\n", fg_console + 1);
2948 static DEVICE_ATTR(active, S_IRUGO, show_tty_active, NULL);
2950 int __init vty_init(const struct file_operations *console_fops)
2952 cdev_init(&vc0_cdev, console_fops);
2953 if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) ||
2954 register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0)
2955 panic("Couldn't register /dev/tty0 driver\n");
2956 tty0dev = device_create(tty_class, NULL, MKDEV(TTY_MAJOR, 0), NULL, "tty0");
2957 if (IS_ERR(tty0dev))
2960 WARN_ON(device_create_file(tty0dev, &dev_attr_active) < 0);
2964 console_driver = alloc_tty_driver(MAX_NR_CONSOLES);
2965 if (!console_driver)
2966 panic("Couldn't allocate console driver\n");
2968 console_driver->name = "tty";
2969 console_driver->name_base = 1;
2970 console_driver->major = TTY_MAJOR;
2971 console_driver->minor_start = 1;
2972 console_driver->type = TTY_DRIVER_TYPE_CONSOLE;
2973 console_driver->init_termios = tty_std_termios;
2975 console_driver->init_termios.c_iflag |= IUTF8;
2976 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS;
2977 tty_set_operations(console_driver, &con_ops);
2978 if (tty_register_driver(console_driver))
2979 panic("Couldn't register console driver\n");
2982 #ifdef CONFIG_MDA_CONSOLE
2988 #ifndef VT_SINGLE_DRIVER
2990 static struct class *vtconsole_class;
2992 static int do_bind_con_driver(const struct consw *csw, int first, int last,
2995 struct module *owner = csw->owner;
2996 const char *desc = NULL;
2997 struct con_driver *con_driver;
2998 int i, j = -1, k = -1, retval = -ENODEV;
3000 if (!try_module_get(owner))
3003 WARN_CONSOLE_UNLOCKED();
3005 /* check if driver is registered */
3006 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3007 con_driver = ®istered_con_driver[i];
3009 if (con_driver->con == csw) {
3010 desc = con_driver->desc;
3019 if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) {
3021 con_driver->flag |= CON_DRIVER_FLAG_INIT;
3026 module_put(conswitchp->owner);
3028 __module_get(owner);
3032 first = max(first, con_driver->first);
3033 last = min(last, con_driver->last);
3035 for (i = first; i <= last; i++) {
3037 struct vc_data *vc = vc_cons[i].d;
3039 if (con_driver_map[i])
3040 module_put(con_driver_map[i]->owner);
3041 __module_get(owner);
3042 con_driver_map[i] = csw;
3044 if (!vc || !vc->vc_sw)
3049 if (CON_IS_VISIBLE(vc)) {
3054 old_was_color = vc->vc_can_do_color;
3055 vc->vc_sw->con_deinit(vc);
3056 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
3057 visual_init(vc, i, 0);
3061 /* If the console changed between mono <-> color, then
3062 * the attributes in the screenbuf will be wrong. The
3063 * following resets all attributes to something sane.
3065 if (old_was_color != vc->vc_can_do_color)
3066 clear_buffer_attributes(vc);
3069 pr_info("Console: switching ");
3071 printk("consoles %d-%d ", first+1, last+1);
3073 struct vc_data *vc = vc_cons[j].d;
3075 printk("to %s %s %dx%d\n",
3076 vc->vc_can_do_color ? "colour" : "mono",
3077 desc, vc->vc_cols, vc->vc_rows);
3084 printk("to %s\n", desc);
3093 static int bind_con_driver(const struct consw *csw, int first, int last,
3099 ret = do_bind_con_driver(csw, first, last, deflt);
3104 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
3105 static int con_is_graphics(const struct consw *csw, int first, int last)
3109 for (i = first; i <= last; i++) {
3110 struct vc_data *vc = vc_cons[i].d;
3112 if (vc && vc->vc_mode == KD_GRAPHICS) {
3122 * unbind_con_driver - unbind a console driver
3123 * @csw: pointer to console driver to unregister
3124 * @first: first in range of consoles that @csw should be unbound from
3125 * @last: last in range of consoles that @csw should be unbound from
3126 * @deflt: should next bound console driver be default after @csw is unbound?
3128 * To unbind a driver from all possible consoles, pass 0 as @first and
3129 * %MAX_NR_CONSOLES as @last.
3131 * @deflt controls whether the console that ends up replacing @csw should be
3132 * the default console.
3135 * -ENODEV if @csw isn't a registered console driver or can't be unregistered
3138 int unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
3143 retval = do_unbind_con_driver(csw, first, last, deflt);
3147 EXPORT_SYMBOL(unbind_con_driver);
3149 /* unlocked version of unbind_con_driver() */
3150 int do_unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
3152 struct module *owner = csw->owner;
3153 const struct consw *defcsw = NULL;
3154 struct con_driver *con_driver = NULL, *con_back = NULL;
3155 int i, retval = -ENODEV;
3157 if (!try_module_get(owner))
3160 WARN_CONSOLE_UNLOCKED();
3162 /* check if driver is registered and if it is unbindable */
3163 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3164 con_driver = ®istered_con_driver[i];
3166 if (con_driver->con == csw &&
3167 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3178 /* check if backup driver exists */
3179 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3180 con_back = ®istered_con_driver[i];
3182 if (con_back->con &&
3183 !(con_back->flag & CON_DRIVER_FLAG_MODULE)) {
3184 defcsw = con_back->con;
3193 if (!con_is_bound(csw))
3196 first = max(first, con_driver->first);
3197 last = min(last, con_driver->last);
3199 for (i = first; i <= last; i++) {
3200 if (con_driver_map[i] == csw) {
3201 module_put(csw->owner);
3202 con_driver_map[i] = NULL;
3206 if (!con_is_bound(defcsw)) {
3207 const struct consw *defconsw = conswitchp;
3209 defcsw->con_startup();
3210 con_back->flag |= CON_DRIVER_FLAG_INIT;
3212 * vgacon may change the default driver to point
3213 * to dummycon, we restore it here...
3215 conswitchp = defconsw;
3218 if (!con_is_bound(csw))
3219 con_driver->flag &= ~CON_DRIVER_FLAG_INIT;
3221 /* ignore return value, binding should not fail */
3222 do_bind_con_driver(defcsw, first, last, deflt);
3228 EXPORT_SYMBOL_GPL(do_unbind_con_driver);
3230 static int vt_bind(struct con_driver *con)
3232 const struct consw *defcsw = NULL, *csw = NULL;
3233 int i, more = 1, first = -1, last = -1, deflt = 0;
3235 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3236 con_is_graphics(con->con, con->first, con->last))
3241 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3242 struct con_driver *con = ®istered_con_driver[i];
3244 if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) {
3256 for (i = con->first; i <= con->last; i++) {
3257 if (con_driver_map[i] == defcsw) {
3262 } else if (first != -1)
3266 if (first == 0 && last == MAX_NR_CONSOLES -1)
3270 bind_con_driver(csw, first, last, deflt);
3281 static int vt_unbind(struct con_driver *con)
3283 const struct consw *csw = NULL;
3284 int i, more = 1, first = -1, last = -1, deflt = 0;
3286 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3287 con_is_graphics(con->con, con->first, con->last))
3295 for (i = con->first; i <= con->last; i++) {
3296 if (con_driver_map[i] == csw) {
3301 } else if (first != -1)
3305 if (first == 0 && last == MAX_NR_CONSOLES -1)
3309 unbind_con_driver(csw, first, last, deflt);
3320 static inline int vt_bind(struct con_driver *con)
3324 static inline int vt_unbind(struct con_driver *con)
3328 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3330 static ssize_t store_bind(struct device *dev, struct device_attribute *attr,
3331 const char *buf, size_t count)
3333 struct con_driver *con = dev_get_drvdata(dev);
3334 int bind = simple_strtoul(buf, NULL, 0);
3344 static ssize_t show_bind(struct device *dev, struct device_attribute *attr,
3347 struct con_driver *con = dev_get_drvdata(dev);
3348 int bind = con_is_bound(con->con);
3350 return snprintf(buf, PAGE_SIZE, "%i\n", bind);
3353 static ssize_t show_name(struct device *dev, struct device_attribute *attr,
3356 struct con_driver *con = dev_get_drvdata(dev);
3358 return snprintf(buf, PAGE_SIZE, "%s %s\n",
3359 (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)",
3364 static struct device_attribute device_attrs[] = {
3365 __ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind),
3366 __ATTR(name, S_IRUGO, show_name, NULL),
3369 static int vtconsole_init_device(struct con_driver *con)
3374 con->flag |= CON_DRIVER_FLAG_ATTR;
3375 dev_set_drvdata(con->dev, con);
3376 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3377 error = device_create_file(con->dev, &device_attrs[i]);
3384 device_remove_file(con->dev, &device_attrs[i]);
3385 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3391 static void vtconsole_deinit_device(struct con_driver *con)
3395 if (con->flag & CON_DRIVER_FLAG_ATTR) {
3396 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3397 device_remove_file(con->dev, &device_attrs[i]);
3398 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3403 * con_is_bound - checks if driver is bound to the console
3404 * @csw: console driver
3406 * RETURNS: zero if unbound, nonzero if bound
3408 * Drivers can call this and if zero, they should release
3409 * all resources allocated on con_startup()
3411 int con_is_bound(const struct consw *csw)
3415 for (i = 0; i < MAX_NR_CONSOLES; i++) {
3416 if (con_driver_map[i] == csw) {
3424 EXPORT_SYMBOL(con_is_bound);
3427 * con_debug_enter - prepare the console for the kernel debugger
3428 * @sw: console driver
3430 * Called when the console is taken over by the kernel debugger, this
3431 * function needs to save the current console state, then put the console
3432 * into a state suitable for the kernel debugger.
3435 * Zero on success, nonzero if a failure occurred when trying to prepare
3436 * the console for the debugger.
3438 int con_debug_enter(struct vc_data *vc)
3442 saved_fg_console = fg_console;
3443 saved_last_console = last_console;
3444 saved_want_console = want_console;
3445 saved_vc_mode = vc->vc_mode;
3446 saved_console_blanked = console_blanked;
3447 vc->vc_mode = KD_TEXT;
3448 console_blanked = 0;
3449 if (vc->vc_sw->con_debug_enter)
3450 ret = vc->vc_sw->con_debug_enter(vc);
3451 #ifdef CONFIG_KGDB_KDB
3452 /* Set the initial LINES variable if it is not already set */
3453 if (vc->vc_rows < 999) {
3456 const char *setargs[3] = {
3461 if (kdbgetintenv(setargs[0], &linecount)) {
3462 snprintf(lns, 4, "%i", vc->vc_rows);
3463 kdb_set(2, setargs);
3466 if (vc->vc_cols < 999) {
3469 const char *setargs[3] = {
3474 if (kdbgetintenv(setargs[0], &colcount)) {
3475 snprintf(cols, 4, "%i", vc->vc_cols);
3476 kdb_set(2, setargs);
3479 #endif /* CONFIG_KGDB_KDB */
3482 EXPORT_SYMBOL_GPL(con_debug_enter);
3485 * con_debug_leave - restore console state
3486 * @sw: console driver
3488 * Restore the console state to what it was before the kernel debugger
3492 * Zero on success, nonzero if a failure occurred when trying to restore
3495 int con_debug_leave(void)
3500 fg_console = saved_fg_console;
3501 last_console = saved_last_console;
3502 want_console = saved_want_console;
3503 console_blanked = saved_console_blanked;
3504 vc_cons[fg_console].d->vc_mode = saved_vc_mode;
3506 vc = vc_cons[fg_console].d;
3507 if (vc->vc_sw->con_debug_leave)
3508 ret = vc->vc_sw->con_debug_leave(vc);
3511 EXPORT_SYMBOL_GPL(con_debug_leave);
3513 static int do_register_con_driver(const struct consw *csw, int first, int last)
3515 struct module *owner = csw->owner;
3516 struct con_driver *con_driver;
3520 WARN_CONSOLE_UNLOCKED();
3522 if (!try_module_get(owner))
3525 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3526 con_driver = ®istered_con_driver[i];
3528 /* already registered */
3529 if (con_driver->con == csw)
3536 desc = csw->con_startup();
3543 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3544 con_driver = ®istered_con_driver[i];
3546 if (con_driver->con == NULL) {
3547 con_driver->con = csw;
3548 con_driver->desc = desc;
3549 con_driver->node = i;
3550 con_driver->flag = CON_DRIVER_FLAG_MODULE |
3551 CON_DRIVER_FLAG_INIT;
3552 con_driver->first = first;
3553 con_driver->last = last;
3562 con_driver->dev = device_create(vtconsole_class, NULL,
3563 MKDEV(0, con_driver->node),
3567 if (IS_ERR(con_driver->dev)) {
3568 printk(KERN_WARNING "Unable to create device for %s; "
3569 "errno = %ld\n", con_driver->desc,
3570 PTR_ERR(con_driver->dev));
3571 con_driver->dev = NULL;
3573 vtconsole_init_device(con_driver);
3582 * register_con_driver - register console driver to console layer
3583 * @csw: console driver
3584 * @first: the first console to take over, minimum value is 0
3585 * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1
3587 * DESCRIPTION: This function registers a console driver which can later
3588 * bind to a range of consoles specified by @first and @last. It will
3589 * also initialize the console driver by calling con_startup().
3591 int register_con_driver(const struct consw *csw, int first, int last)
3596 retval = do_register_con_driver(csw, first, last);
3600 EXPORT_SYMBOL(register_con_driver);
3603 * unregister_con_driver - unregister console driver from console layer
3604 * @csw: console driver
3606 * DESCRIPTION: All drivers that registers to the console layer must
3607 * call this function upon exit, or if the console driver is in a state
3608 * where it won't be able to handle console services, such as the
3609 * framebuffer console without loaded framebuffer drivers.
3611 * The driver must unbind first prior to unregistration.
3613 int unregister_con_driver(const struct consw *csw)
3618 retval = do_unregister_con_driver(csw);
3622 EXPORT_SYMBOL(unregister_con_driver);
3624 int do_unregister_con_driver(const struct consw *csw)
3626 int i, retval = -ENODEV;
3628 /* cannot unregister a bound driver */
3629 if (con_is_bound(csw))
3632 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3633 struct con_driver *con_driver = ®istered_con_driver[i];
3635 if (con_driver->con == csw &&
3636 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3637 vtconsole_deinit_device(con_driver);
3638 device_destroy(vtconsole_class,
3639 MKDEV(0, con_driver->node));
3640 con_driver->con = NULL;
3641 con_driver->desc = NULL;
3642 con_driver->dev = NULL;
3643 con_driver->node = 0;
3644 con_driver->flag = 0;
3645 con_driver->first = 0;
3646 con_driver->last = 0;
3654 EXPORT_SYMBOL_GPL(do_unregister_con_driver);
3657 * If we support more console drivers, this function is used
3658 * when a driver wants to take over some existing consoles
3659 * and become default driver for newly opened ones.
3661 * take_over_console is basically a register followed by unbind
3663 int do_take_over_console(const struct consw *csw, int first, int last, int deflt)
3667 err = do_register_con_driver(csw, first, last);
3669 * If we get an busy error we still want to bind the console driver
3670 * and return success, as we may have unbound the console driver
3671 * but not unregistered it.
3676 do_bind_con_driver(csw, first, last, deflt);
3680 EXPORT_SYMBOL_GPL(do_take_over_console);
3683 * If we support more console drivers, this function is used
3684 * when a driver wants to take over some existing consoles
3685 * and become default driver for newly opened ones.
3687 * take_over_console is basically a register followed by unbind
3689 int take_over_console(const struct consw *csw, int first, int last, int deflt)
3693 err = register_con_driver(csw, first, last);
3695 * If we get an busy error we still want to bind the console driver
3696 * and return success, as we may have unbound the console driver
3697 * but not unregistered it.
3702 bind_con_driver(csw, first, last, deflt);
3708 * give_up_console is a wrapper to unregister_con_driver. It will only
3709 * work if driver is fully unbound.
3711 void give_up_console(const struct consw *csw)
3713 unregister_con_driver(csw);
3716 static int __init vtconsole_class_init(void)
3720 vtconsole_class = class_create(THIS_MODULE, "vtconsole");
3721 if (IS_ERR(vtconsole_class)) {
3722 printk(KERN_WARNING "Unable to create vt console class; "
3723 "errno = %ld\n", PTR_ERR(vtconsole_class));
3724 vtconsole_class = NULL;
3727 /* Add system drivers to sysfs */
3728 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3729 struct con_driver *con = ®istered_con_driver[i];
3731 if (con->con && !con->dev) {
3732 con->dev = device_create(vtconsole_class, NULL,
3733 MKDEV(0, con->node),
3737 if (IS_ERR(con->dev)) {
3738 printk(KERN_WARNING "Unable to create "
3739 "device for %s; errno = %ld\n",
3740 con->desc, PTR_ERR(con->dev));
3743 vtconsole_init_device(con);
3750 postcore_initcall(vtconsole_class_init);
3758 static int set_vesa_blanking(char __user *p)
3762 if (get_user(mode, p + 1))
3765 vesa_blank_mode = (mode < 4) ? mode : 0;
3769 void do_blank_screen(int entering_gfx)
3771 struct vc_data *vc = vc_cons[fg_console].d;
3774 WARN_CONSOLE_UNLOCKED();
3776 if (console_blanked) {
3777 if (blank_state == blank_vesa_wait) {
3778 blank_state = blank_off;
3779 vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0);
3784 /* entering graphics mode? */
3788 vc->vc_sw->con_blank(vc, -1, 1);
3789 console_blanked = fg_console + 1;
3790 blank_state = blank_off;
3795 if (blank_state != blank_normal_wait)
3797 blank_state = blank_off;
3799 /* don't blank graphics */
3800 if (vc->vc_mode != KD_TEXT) {
3801 console_blanked = fg_console + 1;
3806 del_timer_sync(&console_timer);
3807 blank_timer_expired = 0;
3810 /* In case we need to reset origin, blanking hook returns 1 */
3811 i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0);
3812 console_blanked = fg_console + 1;
3816 if (console_blank_hook && console_blank_hook(1))
3819 if (vesa_off_interval && vesa_blank_mode) {
3820 blank_state = blank_vesa_wait;
3821 mod_timer(&console_timer, jiffies + vesa_off_interval);
3823 vt_event_post(VT_EVENT_BLANK, vc->vc_num, vc->vc_num);
3825 EXPORT_SYMBOL(do_blank_screen);
3828 * Called by timer as well as from vt_console_driver
3830 void do_unblank_screen(int leaving_gfx)
3834 /* This should now always be called from a "sane" (read: can schedule)
3835 * context for the sake of the low level drivers, except in the special
3836 * case of oops_in_progress
3838 if (!oops_in_progress)
3841 WARN_CONSOLE_UNLOCKED();
3844 if (!console_blanked)
3846 if (!vc_cons_allocated(fg_console)) {
3848 pr_warning("unblank_screen: tty %d not allocated ??\n",
3852 vc = vc_cons[fg_console].d;
3853 /* Try to unblank in oops case too */
3854 if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc))
3855 return; /* but leave console_blanked != 0 */
3857 if (blankinterval) {
3858 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
3859 blank_state = blank_normal_wait;
3862 console_blanked = 0;
3863 if (vc->vc_sw->con_blank(vc, 0, leaving_gfx) || vt_force_oops_output(vc))
3864 /* Low-level driver cannot restore -> do it ourselves */
3866 if (console_blank_hook)
3867 console_blank_hook(0);
3870 vt_event_post(VT_EVENT_UNBLANK, vc->vc_num, vc->vc_num);
3872 EXPORT_SYMBOL(do_unblank_screen);
3875 * This is called by the outside world to cause a forced unblank, mostly for
3876 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
3877 * call it with 1 as an argument and so force a mode restore... that may kill
3878 * X or at least garbage the screen but would also make the Oops visible...
3880 void unblank_screen(void)
3882 do_unblank_screen(0);
3886 * We defer the timer blanking to work queue so it can take the console mutex
3887 * (console operations can still happen at irq time, but only from printk which
3888 * has the console mutex. Not perfect yet, but better than no locking
3890 static void blank_screen_t(unsigned long dummy)
3892 if (unlikely(!keventd_up())) {
3893 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
3896 blank_timer_expired = 1;
3897 schedule_work(&console_work);
3900 void poke_blanked_console(void)
3902 WARN_CONSOLE_UNLOCKED();
3904 /* Add this so we quickly catch whoever might call us in a non
3905 * safe context. Nowadays, unblank_screen() isn't to be called in
3906 * atomic contexts and is allowed to schedule (with the special case
3907 * of oops_in_progress, but that isn't of any concern for this
3912 /* This isn't perfectly race free, but a race here would be mostly harmless,
3913 * at worse, we'll do a spurrious blank and it's unlikely
3915 del_timer(&console_timer);
3916 blank_timer_expired = 0;
3918 if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS)
3920 if (console_blanked)
3922 else if (blankinterval) {
3923 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
3924 blank_state = blank_normal_wait;
3932 static void set_palette(struct vc_data *vc)
3934 WARN_CONSOLE_UNLOCKED();
3936 if (vc->vc_mode != KD_GRAPHICS)
3937 vc->vc_sw->con_set_palette(vc, color_table);
3941 * Load palette into the DAC registers. arg points to a colour
3942 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
3945 int con_set_cmap(unsigned char __user *arg)
3948 unsigned char colormap[3*16];
3950 if (copy_from_user(colormap, arg, sizeof(colormap)))
3954 for (i = k = 0; i < 16; i++) {
3955 default_red[i] = colormap[k++];
3956 default_grn[i] = colormap[k++];
3957 default_blu[i] = colormap[k++];
3959 for (i = 0; i < MAX_NR_CONSOLES; i++) {
3960 if (!vc_cons_allocated(i))
3962 for (j = k = 0; j < 16; j++) {
3963 vc_cons[i].d->vc_palette[k++] = default_red[j];
3964 vc_cons[i].d->vc_palette[k++] = default_grn[j];
3965 vc_cons[i].d->vc_palette[k++] = default_blu[j];
3967 set_palette(vc_cons[i].d);
3974 int con_get_cmap(unsigned char __user *arg)
3977 unsigned char colormap[3*16];
3980 for (i = k = 0; i < 16; i++) {
3981 colormap[k++] = default_red[i];
3982 colormap[k++] = default_grn[i];
3983 colormap[k++] = default_blu[i];
3987 if (copy_to_user(arg, colormap, sizeof(colormap)))
3993 void reset_palette(struct vc_data *vc)
3996 for (j=k=0; j<16; j++) {
3997 vc->vc_palette[k++] = default_red[j];
3998 vc->vc_palette[k++] = default_grn[j];
3999 vc->vc_palette[k++] = default_blu[j];
4007 * Currently we only support fonts up to 32 pixels wide, at a maximum height
4008 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
4009 * depending on width) reserved for each character which is kinda wasty, but
4010 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
4011 * is up to the actual low-level console-driver convert data into its favorite
4012 * format (maybe we should add a `fontoffset' field to the `display'
4013 * structure so we won't have to convert the fontdata all the time.
4017 #define max_font_size 65536
4019 static int con_font_get(struct vc_data *vc, struct console_font_op *op)
4021 struct console_font font;
4026 font.data = kmalloc(max_font_size, GFP_KERNEL);
4033 if (vc->vc_mode != KD_TEXT)
4035 else if (vc->vc_sw->con_font_get)
4036 rc = vc->vc_sw->con_font_get(vc, &font);
4044 c = (font.width+7)/8 * 32 * font.charcount;
4046 if (op->data && font.charcount > op->charcount)
4048 if (!(op->flags & KD_FONT_FLAG_OLD)) {
4049 if (font.width > op->width || font.height > op->height)
4052 if (font.width != 8)
4054 else if ((op->height && font.height > op->height) ||
4061 op->height = font.height;
4062 op->width = font.width;
4063 op->charcount = font.charcount;
4065 if (op->data && copy_to_user(op->data, font.data, c))
4073 static int con_font_set(struct vc_data *vc, struct console_font_op *op)
4075 struct console_font font;
4079 if (vc->vc_mode != KD_TEXT)
4083 if (op->charcount > 512)
4085 if (!op->height) { /* Need to guess font height [compat] */
4087 u8 __user *charmap = op->data;
4090 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
4091 so that we can get rid of this soon */
4092 if (!(op->flags & KD_FONT_FLAG_OLD))
4094 for (h = 32; h > 0; h--)
4095 for (i = 0; i < op->charcount; i++) {
4096 if (get_user(tmp, &charmap[32*i+h-1]))
4105 if (op->width <= 0 || op->width > 32 || op->height > 32)
4107 size = (op->width+7)/8 * 32 * op->charcount;
4108 if (size > max_font_size)
4110 font.charcount = op->charcount;
4111 font.height = op->height;
4112 font.width = op->width;
4113 font.data = memdup_user(op->data, size);
4114 if (IS_ERR(font.data))
4115 return PTR_ERR(font.data);
4117 if (vc->vc_mode != KD_TEXT)
4119 else if (vc->vc_sw->con_font_set)
4120 rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
4128 static int con_font_default(struct vc_data *vc, struct console_font_op *op)
4130 struct console_font font = {.width = op->width, .height = op->height};
4131 char name[MAX_FONT_NAME];
4138 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0)
4141 name[MAX_FONT_NAME - 1] = 0;
4144 if (vc->vc_mode != KD_TEXT) {
4148 if (vc->vc_sw->con_font_default)
4149 rc = vc->vc_sw->con_font_default(vc, &font, s);
4154 op->width = font.width;
4155 op->height = font.height;
4160 static int con_font_copy(struct vc_data *vc, struct console_font_op *op)
4162 int con = op->height;
4167 if (vc->vc_mode != KD_TEXT)
4169 else if (!vc->vc_sw->con_font_copy)
4171 else if (con < 0 || !vc_cons_allocated(con))
4173 else if (con == vc->vc_num) /* nothing to do */
4176 rc = vc->vc_sw->con_font_copy(vc, con);
4181 int con_font_op(struct vc_data *vc, struct console_font_op *op)
4184 case KD_FONT_OP_SET:
4185 return con_font_set(vc, op);
4186 case KD_FONT_OP_GET:
4187 return con_font_get(vc, op);
4188 case KD_FONT_OP_SET_DEFAULT:
4189 return con_font_default(vc, op);
4190 case KD_FONT_OP_COPY:
4191 return con_font_copy(vc, op);
4197 * Interface exported to selection and vcs.
4200 /* used by selection */
4201 u16 screen_glyph(struct vc_data *vc, int offset)
4203 u16 w = scr_readw(screenpos(vc, offset, 1));
4206 if (w & vc->vc_hi_font_mask)
4210 EXPORT_SYMBOL_GPL(screen_glyph);
4212 /* used by vcs - note the word offset */
4213 unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed)
4215 return screenpos(vc, 2 * w_offset, viewed);
4218 void getconsxy(struct vc_data *vc, unsigned char *p)
4224 void putconsxy(struct vc_data *vc, unsigned char *p)
4227 gotoxy(vc, p[0], p[1]);
4231 u16 vcs_scr_readw(struct vc_data *vc, const u16 *org)
4233 if ((unsigned long)org == vc->vc_pos && softcursor_original != -1)
4234 return softcursor_original;
4235 return scr_readw(org);
4238 void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org)
4240 scr_writew(val, org);
4241 if ((unsigned long)org == vc->vc_pos) {
4242 softcursor_original = -1;
4247 void vcs_scr_updated(struct vc_data *vc)
4253 * Visible symbols for modules
4256 EXPORT_SYMBOL(color_table);
4257 EXPORT_SYMBOL(default_red);
4258 EXPORT_SYMBOL(default_grn);
4259 EXPORT_SYMBOL(default_blu);
4260 EXPORT_SYMBOL(update_region);
4261 EXPORT_SYMBOL(redraw_screen);
4262 EXPORT_SYMBOL(vc_resize);
4263 EXPORT_SYMBOL(fg_console);
4264 EXPORT_SYMBOL(console_blank_hook);
4265 EXPORT_SYMBOL(console_blanked);
4266 EXPORT_SYMBOL(vc_cons);
4267 EXPORT_SYMBOL(global_cursor_default);
4268 #ifndef VT_SINGLE_DRIVER
4269 EXPORT_SYMBOL(take_over_console);
4270 EXPORT_SYMBOL(give_up_console);