2 * linux/drivers/char/vt.c
4 * Copyright (C) 1991, 1992 Linus Torvalds
8 * Hopefully this will be a rather complete VT102 implementation.
10 * Beeping thanks to John T Kohl.
12 * Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics
13 * Chars, and VT100 enhancements by Peter MacDonald.
15 * Copy and paste function by Andrew Haylett,
16 * some enhancements by Alessandro Rubini.
18 * Code to check for different video-cards mostly by Galen Hunt,
19 * <g-hunt@ee.utah.edu>
21 * Rudimentary ISO 10646/Unicode/UTF-8 character set support by
22 * Markus Kuhn, <mskuhn@immd4.informatik.uni-erlangen.de>.
24 * Dynamic allocation of consoles, aeb@cwi.nl, May 1994
25 * Resizing of consoles, aeb, 940926
27 * Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94
30 * User-defined bell sound, new setterm control sequences and printk
31 * redirection by Martin Mares <mj@k332.feld.cvut.cz> 19-Nov-95
33 * APM screenblank bug fixed Takashi Manabe <manabe@roy.dsl.tutics.tut.jp>
35 * Merge with the abstract console driver by Geert Uytterhoeven
36 * <geert@linux-m68k.org>, Jan 1997.
38 * Original m68k console driver modifications by
40 * - Arno Griffioen <arno@usn.nl>
41 * - David Carter <carter@cs.bris.ac.uk>
43 * The abstract console driver provides a generic interface for a text
44 * console. It supports VGA text mode, frame buffer based graphical consoles
45 * and special graphics processors that are only accessible through some
46 * registers (e.g. a TMS340x0 GSP).
48 * The interface to the hardware is specified using a special structure
49 * (struct consw) which contains function pointers to console operations
50 * (see <linux/console.h> for more information).
52 * Support for changeable cursor shape
53 * by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997
55 * Ported to i386 and con_scrolldelta fixed
56 * by Emmanuel Marty <core@ggi-project.org>, April 1998
58 * Resurrected character buffers in videoram plus lots of other trickery
59 * by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998
61 * Removed old-style timers, introduced console_timer, made timer
62 * deletion SMP-safe. 17Jun00, Andrew Morton <andrewm@uow.edu.au>
64 * Removed console_lock, enabled interrupts across all console operations
65 * 13 March 2001, Andrew Morton
68 #include <linux/module.h>
69 #include <linux/types.h>
70 #include <linux/sched.h>
71 #include <linux/tty.h>
72 #include <linux/tty_flip.h>
73 #include <linux/kernel.h>
74 #include <linux/string.h>
75 #include <linux/errno.h>
77 #include <linux/slab.h>
78 #include <linux/major.h>
80 #include <linux/console.h>
81 #include <linux/init.h>
82 #include <linux/devfs_fs_kernel.h>
83 #include <linux/vt_kern.h>
84 #include <linux/selection.h>
85 #include <linux/tiocl.h>
86 #include <linux/kbd_kern.h>
87 #include <linux/consolemap.h>
88 #include <linux/timer.h>
89 #include <linux/interrupt.h>
90 #include <linux/config.h>
91 #include <linux/workqueue.h>
92 #include <linux/bootmem.h>
94 #include <linux/font.h>
95 #include <linux/bitops.h>
98 #include <asm/system.h>
99 #include <asm/uaccess.h>
102 const struct consw *conswitchp;
104 /* A bitmap for codes <32. A bit of 1 indicates that the code
105 * corresponding to that bit number invokes some special action
106 * (such as cursor movement) and should not be displayed as a
107 * glyph unless the disp_ctrl mode is explicitly enabled.
109 #define CTRL_ACTION 0x0d00ff81
110 #define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */
113 * Here is the default bell parameters: 750HZ, 1/8th of a second
115 #define DEFAULT_BELL_PITCH 750
116 #define DEFAULT_BELL_DURATION (HZ/8)
118 extern void vcs_make_devfs(struct tty_struct *tty);
119 extern void vcs_remove_devfs(struct tty_struct *tty);
121 extern void console_map_init(void);
122 #ifdef CONFIG_PROM_CONSOLE
123 extern void prom_con_init(void);
125 #ifdef CONFIG_MDA_CONSOLE
126 extern int mda_console_init(void);
129 struct vc vc_cons [MAX_NR_CONSOLES];
131 #ifndef VT_SINGLE_DRIVER
132 static const struct consw *con_driver_map[MAX_NR_CONSOLES];
135 static int con_open(struct tty_struct *, struct file *);
136 static void vc_init(struct vc_data *vc, unsigned int rows,
137 unsigned int cols, int do_clear);
138 static void gotoxy(struct vc_data *vc, int new_x, int new_y);
139 static void save_cur(struct vc_data *vc);
140 static void reset_terminal(struct vc_data *vc, int do_clear);
141 static void con_flush_chars(struct tty_struct *tty);
142 static void set_vesa_blanking(char __user *p);
143 static void set_cursor(struct vc_data *vc);
144 static void hide_cursor(struct vc_data *vc);
145 static void console_callback(void *ignored);
146 static void blank_screen_t(unsigned long dummy);
147 static void set_palette(struct vc_data *vc);
149 static int printable; /* Is console ready for printing? */
152 * ignore_poke: don't unblank the screen when things are typed. This is
153 * mainly for the privacy of braille terminal users.
155 static int ignore_poke;
157 int do_poke_blanked_console;
160 static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
161 static int blankinterval = 10*60*HZ;
162 static int vesa_off_interval;
164 static DECLARE_WORK(console_work, console_callback, NULL);
167 * fg_console is the current virtual console,
168 * last_console is the last used one,
169 * want_console is the console we want to switch to,
170 * kmsg_redirect is the console for kernel messages,
174 int want_console = -1;
178 * For each existing display, we have a pointer to console currently visible
179 * on that display, allowing consoles other than fg_console to be refreshed
180 * appropriately. Unless the low-level driver supplies its own display_fg
181 * variable, we use this one for the "master display".
183 static struct vc_data *master_display_fg;
186 * Unfortunately, we need to delay tty echo when we're currently writing to the
187 * console since the code is (and always was) not re-entrant, so we schedule
188 * all flip requests to process context with schedule-task() and run it from
189 * console_callback().
193 * For the same reason, we defer scrollback to the console callback.
195 static int scrollback_delta;
198 * Hook so that the power management routines can (un)blank
199 * the console on our behalf.
201 int (*console_blank_hook)(int);
203 static struct timer_list console_timer;
204 static int blank_state;
205 static int blank_timer_expired;
213 * Low-Level Functions
216 #define IS_FG(vc) ((vc)->vc_num == fg_console)
218 #ifdef VT_BUF_VRAM_ONLY
219 #define DO_UPDATE(vc) 0
221 #define DO_UPDATE(vc) CON_IS_VISIBLE(vc)
224 static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed)
229 p = (unsigned short *)(vc->vc_origin + offset);
230 else if (!vc->vc_sw->con_screen_pos)
231 p = (unsigned short *)(vc->vc_visible_origin + offset);
233 p = vc->vc_sw->con_screen_pos(vc, offset);
237 static inline void scrolldelta(int lines)
239 scrollback_delta += lines;
240 schedule_console_callback();
243 void schedule_console_callback(void)
245 schedule_work(&console_work);
248 static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
250 unsigned short *d, *s;
254 if (b > vc->vc_rows || t >= b || nr < 1)
256 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr))
258 d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
259 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr));
260 scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row);
261 scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_video_erase_char,
262 vc->vc_size_row * nr);
265 static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
272 if (b > vc->vc_rows || t >= b || nr < 1)
274 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr))
276 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
277 step = vc->vc_cols * nr;
278 scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row);
279 scr_memsetw(s, vc->vc_video_erase_char, 2 * step);
282 static void do_update_region(struct vc_data *vc, unsigned long start, int count)
284 #ifndef VT_BUF_VRAM_ONLY
285 unsigned int xx, yy, offset;
289 if (!vc->vc_sw->con_getxy) {
290 offset = (start - vc->vc_origin) / 2;
291 xx = offset % vc->vc_cols;
292 yy = offset / vc->vc_cols;
295 start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy);
299 u16 attrib = scr_readw(p) & 0xff00;
302 while (xx < vc->vc_cols && count) {
303 if (attrib != (scr_readw(p) & 0xff00)) {
305 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
308 attrib = scr_readw(p) & 0xff00;
315 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
320 if (vc->vc_sw->con_getxy) {
322 start = vc->vc_sw->con_getxy(vc, start, NULL, NULL);
328 void update_region(struct vc_data *vc, unsigned long start, int count)
330 WARN_CONSOLE_UNLOCKED();
334 do_update_region(vc, start, count);
339 /* Structure of attributes is hardware-dependent */
341 static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink, u8 _underline, u8 _reverse)
343 if (vc->vc_sw->con_build_attr)
344 return vc->vc_sw->con_build_attr(vc, _color, _intensity, _blink, _underline, _reverse);
346 #ifndef VT_BUF_VRAM_ONLY
348 * ++roman: I completely changed the attribute format for monochrome
349 * mode (!can_do_color). The formerly used MDA (monochrome display
350 * adapter) format didn't allow the combination of certain effects.
351 * Now the attribute is just a bit vector:
352 * Bit 0..1: intensity (0..2)
359 if (!vc->vc_can_do_color)
361 (_underline ? 4 : 0) |
365 a = (a & 0xf0) | vc->vc_ulcolor;
366 else if (_intensity == 0)
367 a = (a & 0xf0) | vc->vc_ulcolor;
369 a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77);
374 if (vc->vc_hi_font_mask == 0x100)
383 static void update_attr(struct vc_data *vc)
385 vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity, vc->vc_blink, vc->vc_underline, vc->vc_reverse ^ vc->vc_decscnm);
386 vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm) << 8) | ' ';
389 /* Note: inverting the screen twice should revert to the original state */
390 void invert_screen(struct vc_data *vc, int offset, int count, int viewed)
394 WARN_CONSOLE_UNLOCKED();
397 p = screenpos(vc, offset, viewed);
398 if (vc->vc_sw->con_invert_region)
399 vc->vc_sw->con_invert_region(vc, p, count);
400 #ifndef VT_BUF_VRAM_ONLY
406 if (!vc->vc_can_do_color) {
413 } else if (vc->vc_hi_font_mask == 0x100) {
416 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4);
423 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4);
431 do_update_region(vc, (unsigned long) p, count);
434 /* used by selection: complement pointer position */
435 void complement_pos(struct vc_data *vc, int offset)
437 static unsigned short *p;
438 static unsigned short old;
439 static unsigned short oldx, oldy;
441 WARN_CONSOLE_UNLOCKED();
446 vc->vc_sw->con_putc(vc, old, oldy, oldx);
452 p = screenpos(vc, offset, 1);
454 new = old ^ vc->vc_complement_mask;
457 oldx = (offset >> 1) % vc->vc_cols;
458 oldy = (offset >> 1) / vc->vc_cols;
459 vc->vc_sw->con_putc(vc, new, oldy, oldx);
464 static void insert_char(struct vc_data *vc, unsigned int nr)
466 unsigned short *p, *q = (unsigned short *)vc->vc_pos;
468 p = q + vc->vc_cols - nr - vc->vc_x;
470 scr_writew(scr_readw(p), p + nr);
471 scr_memsetw(q, vc->vc_video_erase_char, nr * 2);
472 vc->vc_need_wrap = 0;
474 unsigned short oldattr = vc->vc_attr;
475 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x, vc->vc_y, vc->vc_x + nr, 1,
476 vc->vc_cols - vc->vc_x - nr);
477 vc->vc_attr = vc->vc_video_erase_char >> 8;
479 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y, vc->vc_x + nr);
480 vc->vc_attr = oldattr;
484 static void delete_char(struct vc_data *vc, unsigned int nr)
486 unsigned int i = vc->vc_x;
487 unsigned short *p = (unsigned short *)vc->vc_pos;
489 while (++i <= vc->vc_cols - nr) {
490 scr_writew(scr_readw(p+nr), p);
493 scr_memsetw(p, vc->vc_video_erase_char, nr * 2);
494 vc->vc_need_wrap = 0;
496 unsigned short oldattr = vc->vc_attr;
497 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x + nr, vc->vc_y, vc->vc_x, 1,
498 vc->vc_cols - vc->vc_x - nr);
499 vc->vc_attr = vc->vc_video_erase_char >> 8;
501 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y,
502 vc->vc_cols - 1 - nr);
503 vc->vc_attr = oldattr;
507 static int softcursor_original;
509 static void add_softcursor(struct vc_data *vc)
511 int i = scr_readw((u16 *) vc->vc_pos);
512 u32 type = vc->vc_cursor_type;
514 if (! (type & 0x10)) return;
515 if (softcursor_original != -1) return;
516 softcursor_original = i;
517 i |= ((type >> 8) & 0xff00 );
518 i ^= ((type) & 0xff00 );
519 if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000;
520 if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700;
521 scr_writew(i, (u16 *) vc->vc_pos);
523 vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x);
526 static void hide_softcursor(struct vc_data *vc)
528 if (softcursor_original != -1) {
529 scr_writew(softcursor_original, (u16 *)vc->vc_pos);
531 vc->vc_sw->con_putc(vc, softcursor_original,
533 softcursor_original = -1;
537 static void hide_cursor(struct vc_data *vc)
541 vc->vc_sw->con_cursor(vc, CM_ERASE);
545 static void set_cursor(struct vc_data *vc)
547 if (!IS_FG(vc) || console_blanked ||
548 vc->vc_mode == KD_GRAPHICS)
554 if ((vc->vc_cursor_type & 0x0f) != 1)
555 vc->vc_sw->con_cursor(vc, CM_DRAW);
560 static void set_origin(struct vc_data *vc)
562 WARN_CONSOLE_UNLOCKED();
564 if (!CON_IS_VISIBLE(vc) ||
565 !vc->vc_sw->con_set_origin ||
566 !vc->vc_sw->con_set_origin(vc))
567 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
568 vc->vc_visible_origin = vc->vc_origin;
569 vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size;
570 vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x;
573 static inline void save_screen(struct vc_data *vc)
575 WARN_CONSOLE_UNLOCKED();
577 if (vc->vc_sw->con_save_screen)
578 vc->vc_sw->con_save_screen(vc);
582 * Redrawing of screen
585 static void clear_buffer_attributes(struct vc_data *vc)
587 unsigned short *p = (unsigned short *)vc->vc_origin;
588 int count = vc->vc_screenbuf_size / 2;
589 int mask = vc->vc_hi_font_mask | 0xff;
591 for (; count > 0; count--, p++) {
592 scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p);
596 void redraw_screen(struct vc_data *vc, int is_switch)
600 WARN_CONSOLE_UNLOCKED();
604 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
609 struct vc_data *old_vc = vc_cons[fg_console].d;
612 if (!CON_IS_VISIBLE(vc))
614 *vc->vc_display_fg = vc;
615 fg_console = vc->vc_num;
617 if (!CON_IS_VISIBLE(old_vc)) {
628 int old_was_color = vc->vc_can_do_color;
631 update = vc->vc_sw->con_switch(vc);
634 * If console changed from mono<->color, the best we can do
635 * is to clear the buffer attributes. As it currently stands,
636 * rebuilding new attributes from the old buffer is not doable
637 * without overly complex code.
639 if (old_was_color != vc->vc_can_do_color) {
641 clear_buffer_attributes(vc);
643 if (update && vc->vc_mode != KD_GRAPHICS)
644 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
649 compute_shiftstate();
654 * Allocation, freeing and resizing of VTs.
657 int vc_cons_allocated(unsigned int i)
659 return (i < MAX_NR_CONSOLES && vc_cons[i].d);
662 static void visual_init(struct vc_data *vc, int num, int init)
664 /* ++Geert: vc->vc_sw->con_init determines console size */
666 module_put(vc->vc_sw->owner);
667 vc->vc_sw = conswitchp;
668 #ifndef VT_SINGLE_DRIVER
669 if (con_driver_map[num])
670 vc->vc_sw = con_driver_map[num];
672 __module_get(vc->vc_sw->owner);
674 vc->vc_display_fg = &master_display_fg;
675 vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir;
676 vc->vc_uni_pagedir = 0;
677 vc->vc_hi_font_mask = 0;
678 vc->vc_complement_mask = 0;
679 vc->vc_can_do_color = 0;
680 vc->vc_sw->con_init(vc, init);
681 if (!vc->vc_complement_mask)
682 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
683 vc->vc_s_complement_mask = vc->vc_complement_mask;
684 vc->vc_size_row = vc->vc_cols << 1;
685 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
688 int vc_allocate(unsigned int currcons) /* return 0 on success */
690 WARN_CONSOLE_UNLOCKED();
692 if (currcons >= MAX_NR_CONSOLES)
694 if (!vc_cons[currcons].d) {
697 /* prevent users from taking too much memory */
698 if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE))
701 /* due to the granularity of kmalloc, we waste some memory here */
702 /* the alloc is done in two steps, to optimize the common situation
703 of a 25x80 console (structsize=216, screenbuf_size=4000) */
704 /* although the numbers above are not valid since long ago, the
705 point is still up-to-date and the comment still has its value
706 even if only as a historical artifact. --mj, July 1998 */
707 vc = kmalloc(sizeof(struct vc_data), GFP_KERNEL);
710 memset(vc, 0, sizeof(*vc));
711 vc_cons[currcons].d = vc;
712 visual_init(vc, currcons, 1);
713 if (!*vc->vc_uni_pagedir_loc)
714 con_set_default_unimap(vc);
715 vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL);
716 if (!vc->vc_screenbuf) {
718 vc_cons[currcons].d = NULL;
721 vc->vc_kmalloced = 1;
722 vc_init(vc, vc->vc_rows, vc->vc_cols, 1);
727 static inline int resize_screen(struct vc_data *vc, int width, int height)
729 /* Resizes the resolution of the display adapater */
732 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize)
733 err = vc->vc_sw->con_resize(vc, width, height);
738 * Change # of rows and columns (0 means unchanged/the size of fg_console)
739 * [this is to be used together with some user program
740 * like resize that changes the hardware videomode]
742 #define VC_RESIZE_MAXCOL (32767)
743 #define VC_RESIZE_MAXROW (32767)
744 int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int lines)
746 unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0;
747 unsigned int old_cols, old_rows, old_row_size, old_screen_size;
748 unsigned int new_cols, new_rows, new_row_size, new_screen_size;
749 unsigned short *newscreen;
751 WARN_CONSOLE_UNLOCKED();
756 if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW)
759 new_cols = (cols ? cols : vc->vc_cols);
760 new_rows = (lines ? lines : vc->vc_rows);
761 new_row_size = new_cols << 1;
762 new_screen_size = new_row_size * new_rows;
764 if (new_cols == vc->vc_cols && new_rows == vc->vc_rows)
767 newscreen = (unsigned short *) kmalloc(new_screen_size, GFP_USER);
771 old_rows = vc->vc_rows;
772 old_cols = vc->vc_cols;
773 old_row_size = vc->vc_size_row;
774 old_screen_size = vc->vc_screenbuf_size;
776 err = resize_screen(vc, new_cols, new_rows);
782 vc->vc_rows = new_rows;
783 vc->vc_cols = new_cols;
784 vc->vc_size_row = new_row_size;
785 vc->vc_screenbuf_size = new_screen_size;
787 rlth = min(old_row_size, new_row_size);
788 rrem = new_row_size - rlth;
789 old_origin = vc->vc_origin;
790 new_origin = (long) newscreen;
791 new_scr_end = new_origin + new_screen_size;
792 if (new_rows < old_rows)
793 old_origin += (old_rows - new_rows) * old_row_size;
797 while (old_origin < vc->vc_scr_end) {
798 scr_memcpyw((unsigned short *) new_origin, (unsigned short *) old_origin, rlth);
800 scr_memsetw((void *)(new_origin + rlth), vc->vc_video_erase_char, rrem);
801 old_origin += old_row_size;
802 new_origin += new_row_size;
804 if (new_scr_end > new_origin)
805 scr_memsetw((void *)new_origin, vc->vc_video_erase_char, new_scr_end - new_origin);
806 if (vc->vc_kmalloced)
807 kfree(vc->vc_screenbuf);
808 vc->vc_screenbuf = newscreen;
809 vc->vc_kmalloced = 1;
810 vc->vc_screenbuf_size = new_screen_size;
813 /* do part of a reset_terminal() */
815 vc->vc_bottom = vc->vc_rows;
816 gotoxy(vc, vc->vc_x, vc->vc_y);
820 struct winsize ws, *cws = &vc->vc_tty->winsize;
822 memset(&ws, 0, sizeof(ws));
823 ws.ws_row = vc->vc_rows;
824 ws.ws_col = vc->vc_cols;
825 ws.ws_ypixel = vc->vc_scan_lines;
826 if ((ws.ws_row != cws->ws_row || ws.ws_col != cws->ws_col) &&
827 vc->vc_tty->pgrp > 0)
828 kill_pg(vc->vc_tty->pgrp, SIGWINCH, 1);
832 if (CON_IS_VISIBLE(vc))
838 void vc_disallocate(unsigned int currcons)
840 WARN_CONSOLE_UNLOCKED();
842 if (vc_cons_allocated(currcons)) {
843 struct vc_data *vc = vc_cons[currcons].d;
844 vc->vc_sw->con_deinit(vc);
845 if (vc->vc_kmalloced)
846 kfree(vc->vc_screenbuf);
847 if (currcons >= MIN_NR_CONSOLES)
849 vc_cons[currcons].d = NULL;
857 #define set_kbd(vc, x) set_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
858 #define clr_kbd(vc, x) clr_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
859 #define is_kbd(vc, x) vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
861 #define decarm VC_REPEAT
862 #define decckm VC_CKMODE
863 #define kbdapplic VC_APPLIC
867 * this is what the terminal answers to a ESC-Z or csi0c query.
869 #define VT100ID "\033[?1;2c"
870 #define VT102ID "\033[?6c"
872 unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7,
873 8,12,10,14, 9,13,11,15 };
875 /* the default colour table, for VGA+ colour systems */
876 int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
877 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
878 int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
879 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
880 int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
881 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
884 * gotoxy() must verify all boundaries, because the arguments
885 * might also be negative. If the given position is out of
886 * bounds, the cursor is placed at the nearest margin.
888 static void gotoxy(struct vc_data *vc, int new_x, int new_y)
895 if (new_x >= vc->vc_cols)
896 vc->vc_x = vc->vc_cols - 1;
903 max_y = vc->vc_bottom;
910 else if (new_y >= max_y)
911 vc->vc_y = max_y - 1;
914 vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1);
915 vc->vc_need_wrap = 0;
918 /* for absolute user moves, when decom is set */
919 static void gotoxay(struct vc_data *vc, int new_x, int new_y)
921 gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y);
924 void scrollback(struct vc_data *vc, int lines)
927 lines = vc->vc_rows / 2;
931 void scrollfront(struct vc_data *vc, int lines)
934 lines = vc->vc_rows / 2;
938 static void lf(struct vc_data *vc)
940 /* don't scroll if above bottom of scrolling region, or
941 * if below scrolling region
943 if (vc->vc_y + 1 == vc->vc_bottom)
944 scrup(vc, vc->vc_top, vc->vc_bottom, 1);
945 else if (vc->vc_y < vc->vc_rows - 1) {
947 vc->vc_pos += vc->vc_size_row;
949 vc->vc_need_wrap = 0;
952 static void ri(struct vc_data *vc)
954 /* don't scroll if below top of scrolling region, or
955 * if above scrolling region
957 if (vc->vc_y == vc->vc_top)
958 scrdown(vc, vc->vc_top, vc->vc_bottom, 1);
959 else if (vc->vc_y > 0) {
961 vc->vc_pos -= vc->vc_size_row;
963 vc->vc_need_wrap = 0;
966 static inline void cr(struct vc_data *vc)
968 vc->vc_pos -= vc->vc_x << 1;
969 vc->vc_need_wrap = vc->vc_x = 0;
972 static inline void bs(struct vc_data *vc)
977 vc->vc_need_wrap = 0;
981 static inline void del(struct vc_data *vc)
986 static void csi_J(struct vc_data *vc, int vpar)
989 unsigned short * start;
992 case 0: /* erase from cursor to end of display */
993 count = (vc->vc_scr_end - vc->vc_pos) >> 1;
994 start = (unsigned short *)vc->vc_pos;
996 /* do in two stages */
997 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
998 vc->vc_cols - vc->vc_x);
999 vc->vc_sw->con_clear(vc, vc->vc_y + 1, 0,
1000 vc->vc_rows - vc->vc_y - 1,
1004 case 1: /* erase from start to cursor */
1005 count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1;
1006 start = (unsigned short *)vc->vc_origin;
1007 if (DO_UPDATE(vc)) {
1008 /* do in two stages */
1009 vc->vc_sw->con_clear(vc, 0, 0, vc->vc_y,
1011 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1015 case 2: /* erase whole display */
1016 count = vc->vc_cols * vc->vc_rows;
1017 start = (unsigned short *)vc->vc_origin;
1019 vc->vc_sw->con_clear(vc, 0, 0,
1026 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1027 vc->vc_need_wrap = 0;
1030 static void csi_K(struct vc_data *vc, int vpar)
1033 unsigned short * start;
1036 case 0: /* erase from cursor to end of line */
1037 count = vc->vc_cols - vc->vc_x;
1038 start = (unsigned short *)vc->vc_pos;
1040 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1041 vc->vc_cols - vc->vc_x);
1043 case 1: /* erase from start of line to cursor */
1044 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1045 count = vc->vc_x + 1;
1047 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1050 case 2: /* erase whole line */
1051 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1052 count = vc->vc_cols;
1054 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1060 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1061 vc->vc_need_wrap = 0;
1064 static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */
1070 count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar;
1072 scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count);
1074 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count);
1075 vc->vc_need_wrap = 0;
1078 static void default_attr(struct vc_data *vc)
1080 vc->vc_intensity = 1;
1081 vc->vc_underline = 0;
1084 vc->vc_color = vc->vc_def_color;
1087 /* console_sem is held */
1088 static void csi_m(struct vc_data *vc)
1092 for (i = 0; i <= vc->vc_npar; i++)
1093 switch (vc->vc_par[i]) {
1094 case 0: /* all attributes off */
1098 vc->vc_intensity = 2;
1101 vc->vc_intensity = 0;
1104 vc->vc_underline = 1;
1112 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1113 * Select primary font, don't display
1114 * control chars if defined, don't set
1117 vc->vc_translate = set_translate(vc->vc_charset == 0
1119 : vc->vc_G1_charset, vc);
1120 vc->vc_disp_ctrl = 0;
1121 vc->vc_toggle_meta = 0;
1123 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1124 * Select first alternate font, lets
1125 * chars < 32 be displayed as ROM chars.
1127 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1128 vc->vc_disp_ctrl = 1;
1129 vc->vc_toggle_meta = 0;
1131 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1132 * Select second alternate font, toggle
1133 * high bit before displaying as ROM char.
1135 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1136 vc->vc_disp_ctrl = 1;
1137 vc->vc_toggle_meta = 1;
1141 vc->vc_intensity = 1;
1144 vc->vc_underline = 0;
1152 case 38: /* ANSI X3.64-1979 (SCO-ish?)
1153 * Enables underscore, white foreground
1154 * with white underscore (Linux - use
1155 * default foreground).
1157 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1158 vc->vc_underline = 1;
1160 case 39: /* ANSI X3.64-1979 (SCO-ish?)
1161 * Disable underline option.
1162 * Reset colour to default? It did this
1165 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1166 vc->vc_underline = 0;
1169 vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f);
1172 if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37)
1173 vc->vc_color = color_table[vc->vc_par[i] - 30]
1174 | (vc->vc_color & 0xf0);
1175 else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47)
1176 vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4)
1177 | (vc->vc_color & 0x0f);
1183 static void respond_string(const char *p, struct tty_struct *tty)
1186 tty_insert_flip_char(tty, *p, 0);
1189 con_schedule_flip(tty);
1192 static void cursor_report(struct vc_data *vc, struct tty_struct *tty)
1196 sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1);
1197 respond_string(buf, tty);
1200 static inline void status_report(struct tty_struct *tty)
1202 respond_string("\033[0n", tty); /* Terminal ok */
1205 static inline void respond_ID(struct tty_struct * tty)
1207 respond_string(VT102ID, tty);
1210 void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry)
1214 sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx),
1216 respond_string(buf, tty);
1219 /* invoked via ioctl(TIOCLINUX) and through set_selection */
1220 int mouse_reporting(void)
1222 return vc_cons[fg_console].d->vc_report_mouse;
1225 /* console_sem is held */
1226 static void set_mode(struct vc_data *vc, int on_off)
1230 for (i = 0; i <= vc->vc_npar; i++)
1232 switch(vc->vc_par[i]) { /* DEC private modes set/reset */
1233 case 1: /* Cursor keys send ^[Ox/^[[x */
1235 set_kbd(vc, decckm);
1237 clr_kbd(vc, decckm);
1239 case 3: /* 80/132 mode switch unimplemented */
1240 vc->vc_deccolm = on_off;
1242 vc_resize(deccolm ? 132 : 80, vc->vc_rows);
1243 /* this alone does not suffice; some user mode
1244 utility has to change the hardware regs */
1247 case 5: /* Inverted screen on/off */
1248 if (vc->vc_decscnm != on_off) {
1249 vc->vc_decscnm = on_off;
1250 invert_screen(vc, 0, vc->vc_screenbuf_size, 0);
1254 case 6: /* Origin relative/absolute */
1255 vc->vc_decom = on_off;
1258 case 7: /* Autowrap on/off */
1259 vc->vc_decawm = on_off;
1261 case 8: /* Autorepeat on/off */
1263 set_kbd(vc, decarm);
1265 clr_kbd(vc, decarm);
1268 vc->vc_report_mouse = on_off ? 1 : 0;
1270 case 25: /* Cursor on/off */
1271 vc->vc_deccm = on_off;
1274 vc->vc_report_mouse = on_off ? 2 : 0;
1278 switch(vc->vc_par[i]) { /* ANSI modes set/reset */
1279 case 3: /* Monitor (display ctrls) */
1280 vc->vc_disp_ctrl = on_off;
1282 case 4: /* Insert Mode on/off */
1283 vc->vc_decim = on_off;
1285 case 20: /* Lf, Enter == CrLf/Lf */
1295 /* console_sem is held */
1296 static void setterm_command(struct vc_data *vc)
1298 switch(vc->vc_par[0]) {
1299 case 1: /* set color for underline mode */
1300 if (vc->vc_can_do_color &&
1301 vc->vc_par[1] < 16) {
1302 vc->vc_ulcolor = color_table[vc->vc_par[1]];
1303 if (vc->vc_underline)
1307 case 2: /* set color for half intensity mode */
1308 if (vc->vc_can_do_color &&
1309 vc->vc_par[1] < 16) {
1310 vc->vc_halfcolor = color_table[vc->vc_par[1]];
1311 if (vc->vc_intensity == 0)
1315 case 8: /* store colors as defaults */
1316 vc->vc_def_color = vc->vc_attr;
1317 if (vc->vc_hi_font_mask == 0x100)
1318 vc->vc_def_color >>= 1;
1322 case 9: /* set blanking interval */
1323 blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1324 poke_blanked_console();
1326 case 10: /* set bell frequency in Hz */
1327 if (vc->vc_npar >= 1)
1328 vc->vc_bell_pitch = vc->vc_par[1];
1330 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1332 case 11: /* set bell duration in msec */
1333 if (vc->vc_npar >= 1)
1334 vc->vc_bell_duration = (vc->vc_par[1] < 2000) ?
1335 vc->vc_par[1] * HZ / 1000 : 0;
1337 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1339 case 12: /* bring specified console to the front */
1340 if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1))
1341 set_console(vc->vc_par[1] - 1);
1343 case 13: /* unblank the screen */
1344 poke_blanked_console();
1346 case 14: /* set vesa powerdown interval */
1347 vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1349 case 15: /* activate the previous console */
1350 set_console(last_console);
1355 /* console_sem is held */
1356 static void csi_at(struct vc_data *vc, unsigned int nr)
1358 if (nr > vc->vc_cols - vc->vc_x)
1359 nr = vc->vc_cols - vc->vc_x;
1362 insert_char(vc, nr);
1365 /* console_sem is held */
1366 static void csi_L(struct vc_data *vc, unsigned int nr)
1368 if (nr > vc->vc_rows - vc->vc_y)
1369 nr = vc->vc_rows - vc->vc_y;
1372 scrdown(vc, vc->vc_y, vc->vc_bottom, nr);
1373 vc->vc_need_wrap = 0;
1376 /* console_sem is held */
1377 static void csi_P(struct vc_data *vc, unsigned int nr)
1379 if (nr > vc->vc_cols - vc->vc_x)
1380 nr = vc->vc_cols - vc->vc_x;
1383 delete_char(vc, nr);
1386 /* console_sem is held */
1387 static void csi_M(struct vc_data *vc, unsigned int nr)
1389 if (nr > vc->vc_rows - vc->vc_y)
1390 nr = vc->vc_rows - vc->vc_y;
1393 scrup(vc, vc->vc_y, vc->vc_bottom, nr);
1394 vc->vc_need_wrap = 0;
1397 /* console_sem is held (except via vc_init->reset_terminal */
1398 static void save_cur(struct vc_data *vc)
1400 vc->vc_saved_x = vc->vc_x;
1401 vc->vc_saved_y = vc->vc_y;
1402 vc->vc_s_intensity = vc->vc_intensity;
1403 vc->vc_s_underline = vc->vc_underline;
1404 vc->vc_s_blink = vc->vc_blink;
1405 vc->vc_s_reverse = vc->vc_reverse;
1406 vc->vc_s_charset = vc->vc_charset;
1407 vc->vc_s_color = vc->vc_color;
1408 vc->vc_saved_G0 = vc->vc_G0_charset;
1409 vc->vc_saved_G1 = vc->vc_G1_charset;
1412 /* console_sem is held */
1413 static void restore_cur(struct vc_data *vc)
1415 gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y);
1416 vc->vc_intensity = vc->vc_s_intensity;
1417 vc->vc_underline = vc->vc_s_underline;
1418 vc->vc_blink = vc->vc_s_blink;
1419 vc->vc_reverse = vc->vc_s_reverse;
1420 vc->vc_charset = vc->vc_s_charset;
1421 vc->vc_color = vc->vc_s_color;
1422 vc->vc_G0_charset = vc->vc_saved_G0;
1423 vc->vc_G1_charset = vc->vc_saved_G1;
1424 vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc);
1426 vc->vc_need_wrap = 0;
1429 enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey,
1430 EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd,
1433 /* console_sem is held (except via vc_init()) */
1434 static void reset_terminal(struct vc_data *vc, int do_clear)
1437 vc->vc_bottom = vc->vc_rows;
1438 vc->vc_state = ESnormal;
1440 vc->vc_translate = set_translate(LAT1_MAP, vc);
1441 vc->vc_G0_charset = LAT1_MAP;
1442 vc->vc_G1_charset = GRAF_MAP;
1444 vc->vc_need_wrap = 0;
1445 vc->vc_report_mouse = 0;
1447 vc->vc_utf_count = 0;
1449 vc->vc_disp_ctrl = 0;
1450 vc->vc_toggle_meta = 0;
1458 set_kbd(vc, decarm);
1459 clr_kbd(vc, decckm);
1460 clr_kbd(vc, kbdapplic);
1462 kbd_table[vc->vc_num].lockstate = 0;
1463 kbd_table[vc->vc_num].slockstate = 0;
1464 kbd_table[vc->vc_num].ledmode = LED_SHOW_FLAGS;
1465 kbd_table[vc->vc_num].ledflagstate = kbd_table[vc->vc_num].default_ledflagstate;
1466 /* do not do set_leds here because this causes an endless tasklet loop
1467 when the keyboard hasn't been initialized yet */
1469 vc->vc_cursor_type = CUR_DEFAULT;
1470 vc->vc_complement_mask = vc->vc_s_complement_mask;
1475 vc->vc_tab_stop[0] = 0x01010100;
1476 vc->vc_tab_stop[1] =
1477 vc->vc_tab_stop[2] =
1478 vc->vc_tab_stop[3] =
1479 vc->vc_tab_stop[4] = 0x01010101;
1481 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1482 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1490 /* console_sem is held */
1491 static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
1494 * Control characters can be used in the _middle_
1495 * of an escape sequence.
1501 if (vc->vc_bell_duration)
1502 kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration);
1508 vc->vc_pos -= (vc->vc_x << 1);
1509 while (vc->vc_x < vc->vc_cols - 1) {
1511 if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31)))
1514 vc->vc_pos += (vc->vc_x << 1);
1516 case 10: case 11: case 12:
1518 if (!is_kbd(vc, lnm))
1525 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1526 vc->vc_disp_ctrl = 1;
1530 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1531 vc->vc_disp_ctrl = 0;
1534 vc->vc_state = ESnormal;
1537 vc->vc_state = ESesc;
1543 vc->vc_state = ESsquare;
1546 switch(vc->vc_state) {
1548 vc->vc_state = ESnormal;
1551 vc->vc_state = ESsquare;
1554 vc->vc_state = ESnonstd;
1557 vc->vc_state = ESpercent;
1570 vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31));
1582 vc->vc_state = ESsetG0;
1585 vc->vc_state = ESsetG1;
1588 vc->vc_state = EShash;
1591 reset_terminal(vc, 1);
1593 case '>': /* Numeric keypad */
1594 clr_kbd(vc, kbdapplic);
1596 case '=': /* Appl. keypad */
1597 set_kbd(vc, kbdapplic);
1602 if (c=='P') { /* palette escape sequence */
1603 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1604 vc->vc_par[vc->vc_npar] = 0;
1606 vc->vc_state = ESpalette;
1608 } else if (c=='R') { /* reset palette */
1610 vc->vc_state = ESnormal;
1612 vc->vc_state = ESnormal;
1615 if ( (c>='0'&&c<='9') || (c>='A'&&c<='F') || (c>='a'&&c<='f') ) {
1616 vc->vc_par[vc->vc_npar++] = (c > '9' ? (c & 0xDF) - 'A' + 10 : c - '0');
1617 if (vc->vc_npar == 7) {
1618 int i = vc->vc_par[0] * 3, j = 1;
1619 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1620 vc->vc_palette[i++] += vc->vc_par[j++];
1621 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1622 vc->vc_palette[i++] += vc->vc_par[j++];
1623 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1624 vc->vc_palette[i] += vc->vc_par[j];
1626 vc->vc_state = ESnormal;
1629 vc->vc_state = ESnormal;
1632 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1633 vc->vc_par[vc->vc_npar] = 0;
1635 vc->vc_state = ESgetpars;
1636 if (c == '[') { /* Function key */
1637 vc->vc_state=ESfunckey;
1640 vc->vc_ques = (c == '?');
1644 if (c == ';' && vc->vc_npar < NPAR - 1) {
1647 } else if (c>='0' && c<='9') {
1648 vc->vc_par[vc->vc_npar] *= 10;
1649 vc->vc_par[vc->vc_npar] += c - '0';
1652 vc->vc_state = ESgotpars;
1654 vc->vc_state = ESnormal;
1665 vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16);
1667 vc->vc_cursor_type = CUR_DEFAULT;
1675 vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1];
1677 vc->vc_complement_mask = vc->vc_s_complement_mask;
1683 if (vc->vc_par[0] == 5)
1685 else if (vc->vc_par[0] == 6)
1686 cursor_report(vc, tty);
1698 gotoxy(vc, vc->vc_par[0], vc->vc_y);
1703 gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]);
1708 gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]);
1713 gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y);
1718 gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y);
1723 gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]);
1728 gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]);
1733 gotoxay(vc, vc->vc_x ,vc->vc_par[0]);
1740 gotoxay(vc, vc->vc_par[1], vc->vc_par[0]);
1743 csi_J(vc, vc->vc_par[0]);
1746 csi_K(vc, vc->vc_par[0]);
1749 csi_L(vc, vc->vc_par[0]);
1752 csi_M(vc, vc->vc_par[0]);
1755 csi_P(vc, vc->vc_par[0]);
1763 vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31));
1764 else if (vc->vc_par[0] == 3) {
1765 vc->vc_tab_stop[0] =
1766 vc->vc_tab_stop[1] =
1767 vc->vc_tab_stop[2] =
1768 vc->vc_tab_stop[3] =
1769 vc->vc_tab_stop[4] = 0;
1775 case 'q': /* DECLL - but only 3 leds */
1776 /* map 0,1,2,3 to 0,1,2,4 */
1777 if (vc->vc_par[0] < 4)
1778 setledstate(kbd_table + vc->vc_num,
1779 (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4);
1785 vc->vc_par[1] = vc->vc_rows;
1786 /* Minimum allowed region is 2 lines */
1787 if (vc->vc_par[0] < vc->vc_par[1] &&
1788 vc->vc_par[1] <= vc->vc_rows) {
1789 vc->vc_top = vc->vc_par[0] - 1;
1790 vc->vc_bottom = vc->vc_par[1];
1801 csi_X(vc, vc->vc_par[0]);
1804 csi_at(vc, vc->vc_par[0]);
1806 case ']': /* setterm functions */
1807 setterm_command(vc);
1812 vc->vc_state = ESnormal;
1814 case '@': /* defined in ISO 2022 */
1817 case 'G': /* prelim official escape code */
1818 case '8': /* retained for compatibility */
1824 vc->vc_state = ESnormal;
1827 vc->vc_state = ESnormal;
1829 /* DEC screen alignment test. kludge :-) */
1830 vc->vc_video_erase_char =
1831 (vc->vc_video_erase_char & 0xff00) | 'E';
1833 vc->vc_video_erase_char =
1834 (vc->vc_video_erase_char & 0xff00) | ' ';
1835 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
1840 vc->vc_G0_charset = GRAF_MAP;
1842 vc->vc_G0_charset = LAT1_MAP;
1844 vc->vc_G0_charset = IBMPC_MAP;
1846 vc->vc_G0_charset = USER_MAP;
1847 if (vc->vc_charset == 0)
1848 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1849 vc->vc_state = ESnormal;
1853 vc->vc_G1_charset = GRAF_MAP;
1855 vc->vc_G1_charset = LAT1_MAP;
1857 vc->vc_G1_charset = IBMPC_MAP;
1859 vc->vc_G1_charset = USER_MAP;
1860 if (vc->vc_charset == 1)
1861 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1862 vc->vc_state = ESnormal;
1865 vc->vc_state = ESnormal;
1869 /* This is a temporary buffer used to prepare a tty console write
1870 * so that we can easily avoid touching user space while holding the
1871 * console spinlock. It is allocated in con_init and is shared by
1872 * this code and the vc_screen read/write tty calls.
1874 * We have to allocate this statically in the kernel data section
1875 * since console_init (and thus con_init) are called before any
1876 * kernel memory allocation is available.
1878 char con_buf[CON_BUF_SIZE];
1879 DECLARE_MUTEX(con_buf_sem);
1881 /* acquires console_sem */
1882 static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count)
1884 #ifdef VT_BUF_VRAM_ONLY
1885 #define FLUSH do { } while(0);
1887 #define FLUSH if (draw_x >= 0) { \
1888 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
1893 int c, tc, ok, n = 0, draw_x = -1;
1894 unsigned int currcons;
1895 unsigned long draw_from = 0, draw_to = 0;
1897 u16 himask, charmask;
1898 const unsigned char *orig_buf = NULL;
1906 acquire_console_sem();
1907 vc = tty->driver_data;
1909 printk(KERN_ERR "vt: argh, driver_data is NULL !\n");
1910 release_console_sem();
1914 currcons = vc->vc_num;
1915 if (!vc_cons_allocated(currcons)) {
1916 /* could this happen? */
1917 static int error = 0;
1920 printk("con_write: tty %d not allocated\n", currcons+1);
1922 release_console_sem();
1925 release_console_sem();
1930 /* At this point 'buf' is guaranteed to be a kernel buffer
1931 * and therefore no access to userspace (and therefore sleeping)
1932 * will be needed. The con_buf_sem serializes all tty based
1933 * console rendering and vcs write/read operations. We hold
1934 * the console spinlock during the entire write.
1937 acquire_console_sem();
1939 vc = tty->driver_data;
1941 printk(KERN_ERR "vt: argh, driver_data _became_ NULL !\n");
1942 release_console_sem();
1946 himask = vc->vc_hi_font_mask;
1947 charmask = himask ? 0x1ff : 0xff;
1949 /* undraw cursor first */
1953 while (!tty->stopped && count) {
1960 /* Do no translation at all in control states */
1961 if (vc->vc_state != ESnormal) {
1963 } else if (vc->vc_utf) {
1964 /* Combine UTF-8 into Unicode */
1965 /* Incomplete characters silently ignored */
1967 if (vc->vc_utf_count > 0 && (c & 0xc0) == 0x80) {
1968 vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f);
1970 if (vc->vc_utf_count == 0)
1971 tc = c = vc->vc_utf_char;
1974 if ((c & 0xe0) == 0xc0) {
1975 vc->vc_utf_count = 1;
1976 vc->vc_utf_char = (c & 0x1f);
1977 } else if ((c & 0xf0) == 0xe0) {
1978 vc->vc_utf_count = 2;
1979 vc->vc_utf_char = (c & 0x0f);
1980 } else if ((c & 0xf8) == 0xf0) {
1981 vc->vc_utf_count = 3;
1982 vc->vc_utf_char = (c & 0x07);
1983 } else if ((c & 0xfc) == 0xf8) {
1984 vc->vc_utf_count = 4;
1985 vc->vc_utf_char = (c & 0x03);
1986 } else if ((c & 0xfe) == 0xfc) {
1987 vc->vc_utf_count = 5;
1988 vc->vc_utf_char = (c & 0x01);
1990 vc->vc_utf_count = 0;
1995 vc->vc_utf_count = 0;
1997 } else { /* no utf */
1998 tc = vc->vc_translate[vc->vc_toggle_meta ? (c | 0x80) : c];
2001 /* If the original code was a control character we
2002 * only allow a glyph to be displayed if the code is
2003 * not normally used (such as for cursor movement) or
2004 * if the disp_ctrl mode has been explicitly enabled.
2005 * Certain characters (as given by the CTRL_ALWAYS
2006 * bitmap) are always displayed as control characters,
2007 * as the console would be pretty useless without
2008 * them; to display an arbitrary font position use the
2009 * direct-to-font zone in UTF-8 mode.
2011 ok = tc && (c >= 32 ||
2012 (!vc->vc_utf && !(((vc->vc_disp_ctrl ? CTRL_ALWAYS
2013 : CTRL_ACTION) >> c) & 1)))
2014 && (c != 127 || vc->vc_disp_ctrl)
2017 if (vc->vc_state == ESnormal && ok) {
2018 /* Now try to find out how to display it */
2019 tc = conv_uni_to_pc(vc, tc);
2021 /* If we got -4 (not found) then see if we have
2022 defined a replacement character (U+FFFD) */
2023 tc = conv_uni_to_pc(vc, 0xfffd);
2025 /* One reason for the -4 can be that we just
2026 did a clear_unimap();
2027 try at least to show something. */
2030 } else if ( tc == -3 ) {
2031 /* Bad hash table -- hope for the best */
2035 continue; /* Conversion failed */
2037 if (vc->vc_need_wrap || vc->vc_decim)
2039 if (vc->vc_need_wrap) {
2046 ((vc->vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) :
2047 (vc->vc_attr << 8) + tc,
2048 (u16 *) vc->vc_pos);
2049 if (DO_UPDATE(vc) && draw_x < 0) {
2051 draw_from = vc->vc_pos;
2053 if (vc->vc_x == vc->vc_cols - 1) {
2054 vc->vc_need_wrap = vc->vc_decawm;
2055 draw_to = vc->vc_pos + 2;
2058 draw_to = (vc->vc_pos += 2);
2063 do_con_trol(tty, vc, orig);
2066 console_conditional_schedule();
2067 release_console_sem();
2075 * This is the console switching callback.
2077 * Doing console switching in a process context allows
2078 * us to do the switches asynchronously (needed when we want
2079 * to switch due to a keyboard interrupt). Synchronization
2080 * with other console code and prevention of re-entrancy is
2081 * ensured with console_sem.
2083 static void console_callback(void *ignored)
2085 acquire_console_sem();
2087 if (want_console >= 0) {
2088 if (want_console != fg_console &&
2089 vc_cons_allocated(want_console)) {
2090 hide_cursor(vc_cons[fg_console].d);
2091 change_console(vc_cons[want_console].d);
2092 /* we only changed when the console had already
2093 been allocated - a new console is not created
2094 in an interrupt routine */
2098 if (do_poke_blanked_console) { /* do not unblank for a LED change */
2099 do_poke_blanked_console = 0;
2100 poke_blanked_console();
2102 if (scrollback_delta) {
2103 struct vc_data *vc = vc_cons[fg_console].d;
2105 if (vc->vc_mode == KD_TEXT)
2106 vc->vc_sw->con_scrolldelta(vc, scrollback_delta);
2107 scrollback_delta = 0;
2109 if (blank_timer_expired) {
2111 blank_timer_expired = 0;
2114 release_console_sem();
2117 void set_console(int nr)
2120 schedule_console_callback();
2123 struct tty_driver *console_driver;
2125 #ifdef CONFIG_VT_CONSOLE
2128 * Console on virtual terminal
2130 * The console must be locked when we get here.
2133 static void vt_console_print(struct console *co, const char *b, unsigned count)
2135 struct vc_data *vc = vc_cons[fg_console].d;
2137 static unsigned long printing;
2138 const ushort *start;
2142 /* console busy or not yet initialized */
2143 if (!printable || test_and_set_bit(0, &printing))
2146 if (kmsg_redirect && vc_cons_allocated(kmsg_redirect - 1))
2147 vc = vc_cons[kmsg_redirect - 1].d;
2149 /* read `x' only after setting currcons properly (otherwise
2150 the `x' macro will read the x of the foreground console). */
2153 if (!vc_cons_allocated(fg_console)) {
2155 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2159 if (vc->vc_mode != KD_TEXT)
2162 /* undraw cursor first */
2166 start = (ushort *)vc->vc_pos;
2168 /* Contrived structure to try to emulate original need_wrap behaviour
2169 * Problems caused when we have need_wrap set on '\n' character */
2172 if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) {
2174 if (CON_IS_VISIBLE(vc))
2175 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2177 if (vc->vc_need_wrap)
2181 if (c == 8) { /* backspace */
2183 start = (ushort *)vc->vc_pos;
2190 start = (ushort *)vc->vc_pos;
2192 if (c == 10 || c == 13)
2195 scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos);
2197 if (myx == vc->vc_cols - 1) {
2198 vc->vc_need_wrap = 1;
2205 if (CON_IS_VISIBLE(vc))
2206 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2208 if (vc->vc_x == vc->vc_cols) {
2210 vc->vc_need_wrap = 1;
2216 clear_bit(0, &printing);
2219 static struct tty_driver *vt_console_device(struct console *c, int *index)
2221 *index = c->index ? c->index-1 : fg_console;
2222 return console_driver;
2225 static struct console vt_console_driver = {
2227 .write = vt_console_print,
2228 .device = vt_console_device,
2229 .unblank = unblank_screen,
2230 .flags = CON_PRINTBUFFER,
2236 * Handling of Linux-specific VC ioctls
2240 * Generally a bit racy with respect to console_sem().
2242 * There are some functions which don't need it.
2244 * There are some functions which can sleep for arbitrary periods
2245 * (paste_selection) but we don't need the lock there anyway.
2247 * set_selection has locking, and definitely needs it
2250 int tioclinux(struct tty_struct *tty, unsigned long arg)
2253 char __user *p = (char __user *)arg;
2257 if (tty->driver->type != TTY_DRIVER_TYPE_CONSOLE)
2259 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN))
2261 if (get_user(type, p))
2267 acquire_console_sem();
2268 ret = set_selection((struct tiocl_selection __user *)(p+1), tty);
2269 release_console_sem();
2271 case TIOCL_PASTESEL:
2272 ret = paste_selection(tty);
2274 case TIOCL_UNBLANKSCREEN:
2275 acquire_console_sem();
2277 release_console_sem();
2279 case TIOCL_SELLOADLUT:
2280 ret = sel_loadlut(p);
2282 case TIOCL_GETSHIFTSTATE:
2285 * Make it possible to react to Shift+Mousebutton.
2286 * Note that 'shift_state' is an undocumented
2287 * kernel-internal variable; programs not closely
2288 * related to the kernel should not use this.
2291 ret = __put_user(data, p);
2293 case TIOCL_GETMOUSEREPORTING:
2294 data = mouse_reporting();
2295 ret = __put_user(data, p);
2297 case TIOCL_SETVESABLANK:
2298 set_vesa_blanking(p);
2300 case TIOCL_SETKMSGREDIRECT:
2301 if (!capable(CAP_SYS_ADMIN)) {
2304 if (get_user(data, p+1))
2307 kmsg_redirect = data;
2310 case TIOCL_GETFGCONSOLE:
2313 case TIOCL_SCROLLCONSOLE:
2314 if (get_user(lines, (s32 __user *)(p+4))) {
2317 scrollfront(vc_cons[fg_console].d, lines);
2321 case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
2322 acquire_console_sem();
2325 release_console_sem();
2327 case TIOCL_BLANKEDSCREEN:
2328 ret = console_blanked;
2338 * /dev/ttyN handling
2341 static int con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2345 retval = do_con_write(tty, buf, count);
2346 con_flush_chars(tty);
2351 static void con_put_char(struct tty_struct *tty, unsigned char ch)
2354 return; /* n_r3964 calls put_char() from interrupt context */
2355 do_con_write(tty, &ch, 1);
2358 static int con_write_room(struct tty_struct *tty)
2362 return 4096; /* No limit, really; we're not buffering */
2365 static int con_chars_in_buffer(struct tty_struct *tty)
2367 return 0; /* we're not buffering */
2371 * con_throttle and con_unthrottle are only used for
2372 * paste_selection(), which has to stuff in a large number of
2375 static void con_throttle(struct tty_struct *tty)
2379 static void con_unthrottle(struct tty_struct *tty)
2381 struct vc_data *vc = tty->driver_data;
2383 wake_up_interruptible(&vc->paste_wait);
2387 * Turn the Scroll-Lock LED on when the tty is stopped
2389 static void con_stop(struct tty_struct *tty)
2394 console_num = tty->index;
2395 if (!vc_cons_allocated(console_num))
2397 set_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2402 * Turn the Scroll-Lock LED off when the console is started
2404 static void con_start(struct tty_struct *tty)
2409 console_num = tty->index;
2410 if (!vc_cons_allocated(console_num))
2412 clr_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2416 static void con_flush_chars(struct tty_struct *tty)
2420 if (in_interrupt()) /* from flush_to_ldisc */
2423 /* if we race with con_close(), vt may be null */
2424 acquire_console_sem();
2425 vc = tty->driver_data;
2428 release_console_sem();
2432 * Allocate the console screen memory.
2434 static int con_open(struct tty_struct *tty, struct file *filp)
2436 unsigned int currcons = tty->index;
2439 acquire_console_sem();
2440 if (tty->driver_data == NULL) {
2441 ret = vc_allocate(currcons);
2443 struct vc_data *vc = vc_cons[currcons].d;
2444 tty->driver_data = vc;
2447 if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
2448 tty->winsize.ws_row = vc_cons[currcons].d->vc_rows;
2449 tty->winsize.ws_col = vc_cons[currcons].d->vc_cols;
2451 release_console_sem();
2452 vcs_make_devfs(tty);
2456 release_console_sem();
2461 * We take tty_sem in here to prevent another thread from coming in via init_dev
2462 * and taking a ref against the tty while we're in the process of forgetting
2463 * about it and cleaning things up.
2465 * This is because vcs_remove_devfs() can sleep and will drop the BKL.
2467 static void con_close(struct tty_struct *tty, struct file *filp)
2470 acquire_console_sem();
2471 if (tty && tty->count == 1) {
2472 struct vc_data *vc = tty->driver_data;
2476 tty->driver_data = NULL;
2477 release_console_sem();
2478 vcs_remove_devfs(tty);
2481 * tty_sem is released, but we still hold BKL, so there is
2482 * still exclusion against init_dev()
2486 release_console_sem();
2490 static void vc_init(struct vc_data *vc, unsigned int rows,
2491 unsigned int cols, int do_clear)
2497 vc->vc_size_row = cols << 1;
2498 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
2501 vc->vc_pos = vc->vc_origin;
2503 for (j=k=0; j<16; j++) {
2504 vc->vc_palette[k++] = default_red[j] ;
2505 vc->vc_palette[k++] = default_grn[j] ;
2506 vc->vc_palette[k++] = default_blu[j] ;
2508 vc->vc_def_color = 0x07; /* white */
2509 vc->vc_ulcolor = 0x0f; /* bold white */
2510 vc->vc_halfcolor = 0x08; /* grey */
2511 init_waitqueue_head(&vc->paste_wait);
2512 reset_terminal(vc, do_clear);
2516 * This routine initializes console interrupts, and does nothing
2517 * else. If you want the screen to clear, call tty_write with
2518 * the appropriate escape-sequence.
2521 static int __init con_init(void)
2523 const char *display_desc = NULL;
2525 unsigned int currcons = 0;
2527 acquire_console_sem();
2530 display_desc = conswitchp->con_startup();
2531 if (!display_desc) {
2533 release_console_sem();
2537 init_timer(&console_timer);
2538 console_timer.function = blank_screen_t;
2539 if (blankinterval) {
2540 blank_state = blank_normal_wait;
2541 mod_timer(&console_timer, jiffies + blankinterval);
2545 * kmalloc is not running yet - we use the bootmem allocator.
2547 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) {
2548 vc_cons[currcons].d = vc = alloc_bootmem(sizeof(struct vc_data));
2549 visual_init(vc, currcons, 1);
2550 vc->vc_screenbuf = (unsigned short *)alloc_bootmem(vc->vc_screenbuf_size);
2551 vc->vc_kmalloced = 0;
2552 vc_init(vc, vc->vc_rows, vc->vc_cols,
2553 currcons || !vc->vc_sw->con_save_screen);
2555 currcons = fg_console = 0;
2556 master_display_fg = vc = vc_cons[currcons].d;
2559 gotoxy(vc, vc->vc_x, vc->vc_y);
2562 printk("Console: %s %s %dx%d",
2563 vc->vc_can_do_color ? "colour" : "mono",
2564 display_desc, vc->vc_cols, vc->vc_rows);
2568 release_console_sem();
2570 #ifdef CONFIG_VT_CONSOLE
2571 register_console(&vt_console_driver);
2575 console_initcall(con_init);
2577 static struct tty_operations con_ops = {
2581 .write_room = con_write_room,
2582 .put_char = con_put_char,
2583 .flush_chars = con_flush_chars,
2584 .chars_in_buffer = con_chars_in_buffer,
2588 .throttle = con_throttle,
2589 .unthrottle = con_unthrottle,
2592 int __init vty_init(void)
2596 console_driver = alloc_tty_driver(MAX_NR_CONSOLES);
2597 if (!console_driver)
2598 panic("Couldn't allocate console driver\n");
2599 console_driver->owner = THIS_MODULE;
2600 console_driver->devfs_name = "vc/";
2601 console_driver->name = "tty";
2602 console_driver->name_base = 1;
2603 console_driver->major = TTY_MAJOR;
2604 console_driver->minor_start = 1;
2605 console_driver->type = TTY_DRIVER_TYPE_CONSOLE;
2606 console_driver->init_termios = tty_std_termios;
2607 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS;
2608 tty_set_operations(console_driver, &con_ops);
2609 if (tty_register_driver(console_driver))
2610 panic("Couldn't register console driver\n");
2614 #ifdef CONFIG_PROM_CONSOLE
2617 #ifdef CONFIG_MDA_CONSOLE
2623 #ifndef VT_SINGLE_DRIVER
2626 * If we support more console drivers, this function is used
2627 * when a driver wants to take over some existing consoles
2628 * and become default driver for newly opened ones.
2631 int take_over_console(const struct consw *csw, int first, int last, int deflt)
2635 struct module *owner;
2638 if (!try_module_get(owner))
2641 acquire_console_sem();
2643 desc = csw->con_startup();
2645 release_console_sem();
2651 module_put(conswitchp->owner);
2652 __module_get(owner);
2656 for (i = first; i <= last; i++) {
2658 struct vc_data *vc = vc_cons[i].d;
2660 if (con_driver_map[i])
2661 module_put(con_driver_map[i]->owner);
2662 __module_get(owner);
2663 con_driver_map[i] = csw;
2665 if (!vc || !vc->vc_sw)
2669 if (CON_IS_VISIBLE(vc))
2671 old_was_color = vc->vc_can_do_color;
2672 vc->vc_sw->con_deinit(vc);
2673 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
2674 vc->vc_visible_origin = vc->vc_origin;
2675 vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size;
2676 vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x;
2677 visual_init(vc, i, 0);
2680 /* If the console changed between mono <-> color, then
2681 * the attributes in the screenbuf will be wrong. The
2682 * following resets all attributes to something sane.
2684 if (old_was_color != vc->vc_can_do_color)
2685 clear_buffer_attributes(vc);
2687 if (CON_IS_VISIBLE(vc))
2690 printk("Console: switching ");
2692 printk("consoles %d-%d ", first+1, last+1);
2694 printk("to %s %s %dx%d\n",
2695 vc_cons[j].d->vc_can_do_color ? "colour" : "mono",
2696 desc, vc_cons[j].d->vc_cols, vc_cons[j].d->vc_rows);
2698 printk("to %s\n", desc);
2700 release_console_sem();
2706 void give_up_console(const struct consw *csw)
2710 for(i = 0; i < MAX_NR_CONSOLES; i++)
2711 if (con_driver_map[i] == csw) {
2712 module_put(csw->owner);
2713 con_driver_map[i] = NULL;
2723 static void set_vesa_blanking(char __user *p)
2726 get_user(mode, p + 1);
2727 vesa_blank_mode = (mode < 4) ? mode : 0;
2731 * This is called by a timer handler
2733 static void vesa_powerdown(void)
2735 struct vc_data *c = vc_cons[fg_console].d;
2737 * Power down if currently suspended (1 or 2),
2738 * suspend if currently blanked (0),
2739 * else do nothing (i.e. already powered down (3)).
2740 * Called only if powerdown features are allowed.
2742 switch (vesa_blank_mode) {
2743 case VESA_NO_BLANKING:
2744 c->vc_sw->con_blank(c, VESA_VSYNC_SUSPEND+1, 0);
2746 case VESA_VSYNC_SUSPEND:
2747 case VESA_HSYNC_SUSPEND:
2748 c->vc_sw->con_blank(c, VESA_POWERDOWN+1, 0);
2753 void do_blank_screen(int entering_gfx)
2755 struct vc_data *vc = vc_cons[fg_console].d;
2758 WARN_CONSOLE_UNLOCKED();
2760 if (console_blanked) {
2761 if (blank_state == blank_vesa_wait) {
2762 blank_state = blank_off;
2768 if (blank_state != blank_normal_wait)
2770 blank_state = blank_off;
2772 /* entering graphics mode? */
2776 vc->vc_sw->con_blank(vc, -1, 1);
2777 console_blanked = fg_console + 1;
2782 /* don't blank graphics */
2783 if (vc->vc_mode != KD_TEXT) {
2784 console_blanked = fg_console + 1;
2789 del_timer_sync(&console_timer);
2790 blank_timer_expired = 0;
2793 /* In case we need to reset origin, blanking hook returns 1 */
2794 i = vc->vc_sw->con_blank(vc, 1, 0);
2795 console_blanked = fg_console + 1;
2799 if (console_blank_hook && console_blank_hook(1))
2802 if (vesa_off_interval) {
2803 blank_state = blank_vesa_wait;
2804 mod_timer(&console_timer, jiffies + vesa_off_interval);
2807 if (vesa_blank_mode)
2808 vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0);
2810 EXPORT_SYMBOL(do_blank_screen);
2813 * Called by timer as well as from vt_console_driver
2815 void do_unblank_screen(int leaving_gfx)
2819 /* This should now always be called from a "sane" (read: can schedule)
2820 * context for the sake of the low level drivers, except in the special
2821 * case of oops_in_progress
2823 if (!oops_in_progress)
2826 WARN_CONSOLE_UNLOCKED();
2829 if (!console_blanked)
2831 if (!vc_cons_allocated(fg_console)) {
2833 printk("unblank_screen: tty %d not allocated ??\n", fg_console+1);
2836 vc = vc_cons[fg_console].d;
2837 if (vc->vc_mode != KD_TEXT)
2838 return; /* but leave console_blanked != 0 */
2840 if (blankinterval) {
2841 mod_timer(&console_timer, jiffies + blankinterval);
2842 blank_state = blank_normal_wait;
2845 console_blanked = 0;
2846 if (vc->vc_sw->con_blank(vc, 0, leaving_gfx))
2847 /* Low-level driver cannot restore -> do it ourselves */
2849 if (console_blank_hook)
2850 console_blank_hook(0);
2854 EXPORT_SYMBOL(do_unblank_screen);
2857 * This is called by the outside world to cause a forced unblank, mostly for
2858 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
2859 * call it with 1 as an argument and so force a mode restore... that may kill
2860 * X or at least garbage the screen but would also make the Oops visible...
2862 void unblank_screen(void)
2864 do_unblank_screen(0);
2868 * We defer the timer blanking to work queue so it can take the console semaphore
2869 * (console operations can still happen at irq time, but only from printk which
2870 * has the console semaphore. Not perfect yet, but better than no locking
2872 static void blank_screen_t(unsigned long dummy)
2874 if (unlikely(!keventd_up())) {
2875 mod_timer(&console_timer, jiffies + blankinterval);
2878 blank_timer_expired = 1;
2879 schedule_work(&console_work);
2882 void poke_blanked_console(void)
2884 WARN_CONSOLE_UNLOCKED();
2886 /* Add this so we quickly catch whoever might call us in a non
2887 * safe context. Nowadays, unblank_screen() isn't to be called in
2888 * atomic contexts and is allowed to schedule (with the special case
2889 * of oops_in_progress, but that isn't of any concern for this
2894 /* This isn't perfectly race free, but a race here would be mostly harmless,
2895 * at worse, we'll do a spurrious blank and it's unlikely
2897 del_timer(&console_timer);
2898 blank_timer_expired = 0;
2900 if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS)
2902 if (console_blanked)
2904 else if (blankinterval) {
2905 mod_timer(&console_timer, jiffies + blankinterval);
2906 blank_state = blank_normal_wait;
2914 static void set_palette(struct vc_data *vc)
2916 WARN_CONSOLE_UNLOCKED();
2918 if (vc->vc_mode != KD_GRAPHICS)
2919 vc->vc_sw->con_set_palette(vc, color_table);
2922 static int set_get_cmap(unsigned char __user *arg, int set)
2926 WARN_CONSOLE_UNLOCKED();
2928 for (i = 0; i < 16; i++)
2930 get_user(default_red[i], arg++);
2931 get_user(default_grn[i], arg++);
2932 get_user(default_blu[i], arg++);
2934 put_user(default_red[i], arg++);
2935 put_user(default_grn[i], arg++);
2936 put_user(default_blu[i], arg++);
2939 for (i = 0; i < MAX_NR_CONSOLES; i++)
2940 if (vc_cons_allocated(i)) {
2941 for (j = k = 0; j < 16; j++) {
2942 vc_cons[i].d->vc_palette[k++] = default_red[j];
2943 vc_cons[i].d->vc_palette[k++] = default_grn[j];
2944 vc_cons[i].d->vc_palette[k++] = default_blu[j];
2946 set_palette(vc_cons[i].d);
2953 * Load palette into the DAC registers. arg points to a colour
2954 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
2957 int con_set_cmap(unsigned char __user *arg)
2961 acquire_console_sem();
2962 rc = set_get_cmap (arg,1);
2963 release_console_sem();
2968 int con_get_cmap(unsigned char __user *arg)
2972 acquire_console_sem();
2973 rc = set_get_cmap (arg,0);
2974 release_console_sem();
2979 void reset_palette(struct vc_data *vc)
2982 for (j=k=0; j<16; j++) {
2983 vc->vc_palette[k++] = default_red[j];
2984 vc->vc_palette[k++] = default_grn[j];
2985 vc->vc_palette[k++] = default_blu[j];
2993 * Currently we only support fonts up to 32 pixels wide, at a maximum height
2994 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
2995 * depending on width) reserved for each character which is kinda wasty, but
2996 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
2997 * is upto the actual low-level console-driver convert data into its favorite
2998 * format (maybe we should add a `fontoffset' field to the `display'
2999 * structure so we won't have to convert the fontdata all the time.
3003 #define max_font_size 65536
3005 static int con_font_get(struct vc_data *vc, struct console_font_op *op)
3007 struct console_font font;
3011 if (vc->vc_mode != KD_TEXT)
3015 font.data = kmalloc(max_font_size, GFP_KERNEL);
3021 acquire_console_sem();
3022 if (vc->vc_sw->con_font_get)
3023 rc = vc->vc_sw->con_font_get(vc, &font);
3026 release_console_sem();
3031 c = (font.width+7)/8 * 32 * font.charcount;
3033 if (op->data && font.charcount > op->charcount)
3035 if (!(op->flags & KD_FONT_FLAG_OLD)) {
3036 if (font.width > op->width || font.height > op->height)
3039 if (font.width != 8)
3041 else if ((op->height && font.height > op->height) ||
3048 op->height = font.height;
3049 op->width = font.width;
3050 op->charcount = font.charcount;
3052 if (op->data && copy_to_user(op->data, font.data, c))
3060 static int con_font_set(struct vc_data *vc, struct console_font_op *op)
3062 struct console_font font;
3066 if (vc->vc_mode != KD_TEXT)
3070 if (op->charcount > 512)
3072 if (!op->height) { /* Need to guess font height [compat] */
3074 u8 __user *charmap = op->data;
3077 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
3078 so that we can get rid of this soon */
3079 if (!(op->flags & KD_FONT_FLAG_OLD))
3081 for (h = 32; h > 0; h--)
3082 for (i = 0; i < op->charcount; i++) {
3083 if (get_user(tmp, &charmap[32*i+h-1]))
3092 if (op->width <= 0 || op->width > 32 || op->height > 32)
3094 size = (op->width+7)/8 * 32 * op->charcount;
3095 if (size > max_font_size)
3097 font.charcount = op->charcount;
3098 font.height = op->height;
3099 font.width = op->width;
3100 font.data = kmalloc(size, GFP_KERNEL);
3103 if (copy_from_user(font.data, op->data, size)) {
3107 acquire_console_sem();
3108 if (vc->vc_sw->con_font_set)
3109 rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
3112 release_console_sem();
3117 static int con_font_default(struct vc_data *vc, struct console_font_op *op)
3119 struct console_font font = {.width = op->width, .height = op->height};
3120 char name[MAX_FONT_NAME];
3124 if (vc->vc_mode != KD_TEXT)
3129 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0)
3132 name[MAX_FONT_NAME - 1] = 0;
3134 acquire_console_sem();
3135 if (vc->vc_sw->con_font_default)
3136 rc = vc->vc_sw->con_font_default(vc, &font, s);
3139 release_console_sem();
3141 op->width = font.width;
3142 op->height = font.height;
3147 static int con_font_copy(struct vc_data *vc, struct console_font_op *op)
3149 int con = op->height;
3152 if (vc->vc_mode != KD_TEXT)
3155 acquire_console_sem();
3156 if (!vc->vc_sw->con_font_copy)
3158 else if (con < 0 || !vc_cons_allocated(con))
3160 else if (con == vc->vc_num) /* nothing to do */
3163 rc = vc->vc_sw->con_font_copy(vc, con);
3164 release_console_sem();
3168 int con_font_op(struct vc_data *vc, struct console_font_op *op)
3171 case KD_FONT_OP_SET:
3172 return con_font_set(vc, op);
3173 case KD_FONT_OP_GET:
3174 return con_font_get(vc, op);
3175 case KD_FONT_OP_SET_DEFAULT:
3176 return con_font_default(vc, op);
3177 case KD_FONT_OP_COPY:
3178 return con_font_copy(vc, op);
3184 * Interface exported to selection and vcs.
3187 /* used by selection */
3188 u16 screen_glyph(struct vc_data *vc, int offset)
3190 u16 w = scr_readw(screenpos(vc, offset, 1));
3193 if (w & vc->vc_hi_font_mask)
3198 /* used by vcs - note the word offset */
3199 unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed)
3201 return screenpos(vc, 2 * w_offset, viewed);
3204 void getconsxy(struct vc_data *vc, unsigned char *p)
3210 void putconsxy(struct vc_data *vc, unsigned char *p)
3212 gotoxy(vc, p[0], p[1]);
3216 u16 vcs_scr_readw(struct vc_data *vc, const u16 *org)
3218 if ((unsigned long)org == vc->vc_pos && softcursor_original != -1)
3219 return softcursor_original;
3220 return scr_readw(org);
3223 void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org)
3225 scr_writew(val, org);
3226 if ((unsigned long)org == vc->vc_pos) {
3227 softcursor_original = -1;
3233 * Visible symbols for modules
3236 EXPORT_SYMBOL(color_table);
3237 EXPORT_SYMBOL(default_red);
3238 EXPORT_SYMBOL(default_grn);
3239 EXPORT_SYMBOL(default_blu);
3240 EXPORT_SYMBOL(update_region);
3241 EXPORT_SYMBOL(redraw_screen);
3242 EXPORT_SYMBOL(vc_resize);
3243 EXPORT_SYMBOL(fg_console);
3244 EXPORT_SYMBOL(console_blank_hook);
3245 EXPORT_SYMBOL(console_blanked);
3246 EXPORT_SYMBOL(vc_cons);
3247 #ifndef VT_SINGLE_DRIVER
3248 EXPORT_SYMBOL(take_over_console);
3249 EXPORT_SYMBOL(give_up_console);