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/vt_kern.h>
83 #include <linux/selection.h>
84 #include <linux/tiocl.h>
85 #include <linux/kbd_kern.h>
86 #include <linux/consolemap.h>
87 #include <linux/timer.h>
88 #include <linux/interrupt.h>
89 #include <linux/workqueue.h>
90 #include <linux/bootmem.h>
92 #include <linux/font.h>
93 #include <linux/bitops.h>
96 #include <asm/system.h>
97 #include <asm/uaccess.h>
99 #define MAX_NR_CON_DRIVER 16
101 #define CON_DRIVER_FLAG_MODULE 1
102 #define CON_DRIVER_FLAG_INIT 2
105 const struct consw *con;
107 struct class_device *class_dev;
114 static struct con_driver registered_con_driver[MAX_NR_CON_DRIVER];
115 const struct consw *conswitchp;
117 /* A bitmap for codes <32. A bit of 1 indicates that the code
118 * corresponding to that bit number invokes some special action
119 * (such as cursor movement) and should not be displayed as a
120 * glyph unless the disp_ctrl mode is explicitly enabled.
122 #define CTRL_ACTION 0x0d00ff81
123 #define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */
126 * Here is the default bell parameters: 750HZ, 1/8th of a second
128 #define DEFAULT_BELL_PITCH 750
129 #define DEFAULT_BELL_DURATION (HZ/8)
131 extern void vcs_make_devfs(struct tty_struct *tty);
132 extern void vcs_remove_devfs(struct tty_struct *tty);
134 extern void console_map_init(void);
135 #ifdef CONFIG_PROM_CONSOLE
136 extern void prom_con_init(void);
138 #ifdef CONFIG_MDA_CONSOLE
139 extern int mda_console_init(void);
142 struct vc vc_cons [MAX_NR_CONSOLES];
144 #ifndef VT_SINGLE_DRIVER
145 static const struct consw *con_driver_map[MAX_NR_CONSOLES];
148 static int con_open(struct tty_struct *, struct file *);
149 static void vc_init(struct vc_data *vc, unsigned int rows,
150 unsigned int cols, int do_clear);
151 static void gotoxy(struct vc_data *vc, int new_x, int new_y);
152 static void save_cur(struct vc_data *vc);
153 static void reset_terminal(struct vc_data *vc, int do_clear);
154 static void con_flush_chars(struct tty_struct *tty);
155 static void set_vesa_blanking(char __user *p);
156 static void set_cursor(struct vc_data *vc);
157 static void hide_cursor(struct vc_data *vc);
158 static void console_callback(void *ignored);
159 static void blank_screen_t(unsigned long dummy);
160 static void set_palette(struct vc_data *vc);
162 static int printable; /* Is console ready for printing? */
165 * ignore_poke: don't unblank the screen when things are typed. This is
166 * mainly for the privacy of braille terminal users.
168 static int ignore_poke;
170 int do_poke_blanked_console;
173 static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
174 static int blankinterval = 10*60*HZ;
175 static int vesa_off_interval;
177 static DECLARE_WORK(console_work, console_callback, NULL);
180 * fg_console is the current virtual console,
181 * last_console is the last used one,
182 * want_console is the console we want to switch to,
183 * kmsg_redirect is the console for kernel messages,
187 int want_console = -1;
191 * For each existing display, we have a pointer to console currently visible
192 * on that display, allowing consoles other than fg_console to be refreshed
193 * appropriately. Unless the low-level driver supplies its own display_fg
194 * variable, we use this one for the "master display".
196 static struct vc_data *master_display_fg;
199 * Unfortunately, we need to delay tty echo when we're currently writing to the
200 * console since the code is (and always was) not re-entrant, so we schedule
201 * all flip requests to process context with schedule-task() and run it from
202 * console_callback().
206 * For the same reason, we defer scrollback to the console callback.
208 static int scrollback_delta;
211 * Hook so that the power management routines can (un)blank
212 * the console on our behalf.
214 int (*console_blank_hook)(int);
216 static struct timer_list console_timer;
217 static int blank_state;
218 static int blank_timer_expired;
226 * Low-Level Functions
229 #define IS_FG(vc) ((vc)->vc_num == fg_console)
231 #ifdef VT_BUF_VRAM_ONLY
232 #define DO_UPDATE(vc) 0
234 #define DO_UPDATE(vc) CON_IS_VISIBLE(vc)
237 static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed)
242 p = (unsigned short *)(vc->vc_origin + offset);
243 else if (!vc->vc_sw->con_screen_pos)
244 p = (unsigned short *)(vc->vc_visible_origin + offset);
246 p = vc->vc_sw->con_screen_pos(vc, offset);
250 static inline void scrolldelta(int lines)
252 scrollback_delta += lines;
253 schedule_console_callback();
256 void schedule_console_callback(void)
258 schedule_work(&console_work);
261 static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
263 unsigned short *d, *s;
267 if (b > vc->vc_rows || t >= b || nr < 1)
269 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr))
271 d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
272 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr));
273 scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row);
274 scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_video_erase_char,
275 vc->vc_size_row * nr);
278 static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
285 if (b > vc->vc_rows || t >= b || nr < 1)
287 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr))
289 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
290 step = vc->vc_cols * nr;
291 scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row);
292 scr_memsetw(s, vc->vc_video_erase_char, 2 * step);
295 static void do_update_region(struct vc_data *vc, unsigned long start, int count)
297 #ifndef VT_BUF_VRAM_ONLY
298 unsigned int xx, yy, offset;
302 if (!vc->vc_sw->con_getxy) {
303 offset = (start - vc->vc_origin) / 2;
304 xx = offset % vc->vc_cols;
305 yy = offset / vc->vc_cols;
308 start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy);
312 u16 attrib = scr_readw(p) & 0xff00;
315 while (xx < vc->vc_cols && count) {
316 if (attrib != (scr_readw(p) & 0xff00)) {
318 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
321 attrib = scr_readw(p) & 0xff00;
328 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
333 if (vc->vc_sw->con_getxy) {
335 start = vc->vc_sw->con_getxy(vc, start, NULL, NULL);
341 void update_region(struct vc_data *vc, unsigned long start, int count)
343 WARN_CONSOLE_UNLOCKED();
347 do_update_region(vc, start, count);
352 /* Structure of attributes is hardware-dependent */
354 static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink, u8 _underline, u8 _reverse)
356 if (vc->vc_sw->con_build_attr)
357 return vc->vc_sw->con_build_attr(vc, _color, _intensity, _blink, _underline, _reverse);
359 #ifndef VT_BUF_VRAM_ONLY
361 * ++roman: I completely changed the attribute format for monochrome
362 * mode (!can_do_color). The formerly used MDA (monochrome display
363 * adapter) format didn't allow the combination of certain effects.
364 * Now the attribute is just a bit vector:
365 * Bit 0..1: intensity (0..2)
372 if (!vc->vc_can_do_color)
374 (_underline ? 4 : 0) |
378 a = (a & 0xf0) | vc->vc_ulcolor;
379 else if (_intensity == 0)
380 a = (a & 0xf0) | vc->vc_ulcolor;
382 a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77);
387 if (vc->vc_hi_font_mask == 0x100)
396 static void update_attr(struct vc_data *vc)
398 vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity, vc->vc_blink, vc->vc_underline, vc->vc_reverse ^ vc->vc_decscnm);
399 vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm) << 8) | ' ';
402 /* Note: inverting the screen twice should revert to the original state */
403 void invert_screen(struct vc_data *vc, int offset, int count, int viewed)
407 WARN_CONSOLE_UNLOCKED();
410 p = screenpos(vc, offset, viewed);
411 if (vc->vc_sw->con_invert_region)
412 vc->vc_sw->con_invert_region(vc, p, count);
413 #ifndef VT_BUF_VRAM_ONLY
419 if (!vc->vc_can_do_color) {
426 } else if (vc->vc_hi_font_mask == 0x100) {
429 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4);
436 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4);
444 do_update_region(vc, (unsigned long) p, count);
447 /* used by selection: complement pointer position */
448 void complement_pos(struct vc_data *vc, int offset)
450 static int old_offset = -1;
451 static unsigned short old;
452 static unsigned short oldx, oldy;
454 WARN_CONSOLE_UNLOCKED();
456 if (old_offset != -1 && old_offset >= 0 &&
457 old_offset < vc->vc_screenbuf_size) {
458 scr_writew(old, screenpos(vc, old_offset, 1));
460 vc->vc_sw->con_putc(vc, old, oldy, oldx);
465 if (offset != -1 && offset >= 0 &&
466 offset < vc->vc_screenbuf_size) {
469 p = screenpos(vc, offset, 1);
471 new = old ^ vc->vc_complement_mask;
474 oldx = (offset >> 1) % vc->vc_cols;
475 oldy = (offset >> 1) / vc->vc_cols;
476 vc->vc_sw->con_putc(vc, new, oldy, oldx);
482 static void insert_char(struct vc_data *vc, unsigned int nr)
484 unsigned short *p, *q = (unsigned short *)vc->vc_pos;
486 p = q + vc->vc_cols - nr - vc->vc_x;
488 scr_writew(scr_readw(p), p + nr);
489 scr_memsetw(q, vc->vc_video_erase_char, nr * 2);
490 vc->vc_need_wrap = 0;
492 unsigned short oldattr = vc->vc_attr;
493 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x, vc->vc_y, vc->vc_x + nr, 1,
494 vc->vc_cols - vc->vc_x - nr);
495 vc->vc_attr = vc->vc_video_erase_char >> 8;
497 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y, vc->vc_x + nr);
498 vc->vc_attr = oldattr;
502 static void delete_char(struct vc_data *vc, unsigned int nr)
504 unsigned int i = vc->vc_x;
505 unsigned short *p = (unsigned short *)vc->vc_pos;
507 while (++i <= vc->vc_cols - nr) {
508 scr_writew(scr_readw(p+nr), p);
511 scr_memsetw(p, vc->vc_video_erase_char, nr * 2);
512 vc->vc_need_wrap = 0;
514 unsigned short oldattr = vc->vc_attr;
515 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x + nr, vc->vc_y, vc->vc_x, 1,
516 vc->vc_cols - vc->vc_x - nr);
517 vc->vc_attr = vc->vc_video_erase_char >> 8;
519 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y,
520 vc->vc_cols - 1 - nr);
521 vc->vc_attr = oldattr;
525 static int softcursor_original;
527 static void add_softcursor(struct vc_data *vc)
529 int i = scr_readw((u16 *) vc->vc_pos);
530 u32 type = vc->vc_cursor_type;
532 if (! (type & 0x10)) return;
533 if (softcursor_original != -1) return;
534 softcursor_original = i;
535 i |= ((type >> 8) & 0xff00 );
536 i ^= ((type) & 0xff00 );
537 if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000;
538 if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700;
539 scr_writew(i, (u16 *) vc->vc_pos);
541 vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x);
544 static void hide_softcursor(struct vc_data *vc)
546 if (softcursor_original != -1) {
547 scr_writew(softcursor_original, (u16 *)vc->vc_pos);
549 vc->vc_sw->con_putc(vc, softcursor_original,
551 softcursor_original = -1;
555 static void hide_cursor(struct vc_data *vc)
559 vc->vc_sw->con_cursor(vc, CM_ERASE);
563 static void set_cursor(struct vc_data *vc)
565 if (!IS_FG(vc) || console_blanked ||
566 vc->vc_mode == KD_GRAPHICS)
572 if ((vc->vc_cursor_type & 0x0f) != 1)
573 vc->vc_sw->con_cursor(vc, CM_DRAW);
578 static void set_origin(struct vc_data *vc)
580 WARN_CONSOLE_UNLOCKED();
582 if (!CON_IS_VISIBLE(vc) ||
583 !vc->vc_sw->con_set_origin ||
584 !vc->vc_sw->con_set_origin(vc))
585 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
586 vc->vc_visible_origin = vc->vc_origin;
587 vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size;
588 vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x;
591 static inline void save_screen(struct vc_data *vc)
593 WARN_CONSOLE_UNLOCKED();
595 if (vc->vc_sw->con_save_screen)
596 vc->vc_sw->con_save_screen(vc);
600 * Redrawing of screen
603 static void clear_buffer_attributes(struct vc_data *vc)
605 unsigned short *p = (unsigned short *)vc->vc_origin;
606 int count = vc->vc_screenbuf_size / 2;
607 int mask = vc->vc_hi_font_mask | 0xff;
609 for (; count > 0; count--, p++) {
610 scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p);
614 void redraw_screen(struct vc_data *vc, int is_switch)
618 WARN_CONSOLE_UNLOCKED();
622 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
627 struct vc_data *old_vc = vc_cons[fg_console].d;
630 if (!CON_IS_VISIBLE(vc))
632 *vc->vc_display_fg = vc;
633 fg_console = vc->vc_num;
635 if (!CON_IS_VISIBLE(old_vc)) {
646 int old_was_color = vc->vc_can_do_color;
649 update = vc->vc_sw->con_switch(vc);
652 * If console changed from mono<->color, the best we can do
653 * is to clear the buffer attributes. As it currently stands,
654 * rebuilding new attributes from the old buffer is not doable
655 * without overly complex code.
657 if (old_was_color != vc->vc_can_do_color) {
659 clear_buffer_attributes(vc);
661 if (update && vc->vc_mode != KD_GRAPHICS)
662 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
667 compute_shiftstate();
672 * Allocation, freeing and resizing of VTs.
675 int vc_cons_allocated(unsigned int i)
677 return (i < MAX_NR_CONSOLES && vc_cons[i].d);
680 static void visual_init(struct vc_data *vc, int num, int init)
682 /* ++Geert: vc->vc_sw->con_init determines console size */
684 module_put(vc->vc_sw->owner);
685 vc->vc_sw = conswitchp;
686 #ifndef VT_SINGLE_DRIVER
687 if (con_driver_map[num])
688 vc->vc_sw = con_driver_map[num];
690 __module_get(vc->vc_sw->owner);
692 vc->vc_display_fg = &master_display_fg;
693 vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir;
694 vc->vc_uni_pagedir = 0;
695 vc->vc_hi_font_mask = 0;
696 vc->vc_complement_mask = 0;
697 vc->vc_can_do_color = 0;
698 vc->vc_sw->con_init(vc, init);
699 if (!vc->vc_complement_mask)
700 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
701 vc->vc_s_complement_mask = vc->vc_complement_mask;
702 vc->vc_size_row = vc->vc_cols << 1;
703 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
706 int vc_allocate(unsigned int currcons) /* return 0 on success */
708 WARN_CONSOLE_UNLOCKED();
710 if (currcons >= MAX_NR_CONSOLES)
712 if (!vc_cons[currcons].d) {
715 /* prevent users from taking too much memory */
716 if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE))
719 /* due to the granularity of kmalloc, we waste some memory here */
720 /* the alloc is done in two steps, to optimize the common situation
721 of a 25x80 console (structsize=216, screenbuf_size=4000) */
722 /* although the numbers above are not valid since long ago, the
723 point is still up-to-date and the comment still has its value
724 even if only as a historical artifact. --mj, July 1998 */
725 vc = kmalloc(sizeof(struct vc_data), GFP_KERNEL);
728 memset(vc, 0, sizeof(*vc));
729 vc_cons[currcons].d = vc;
730 visual_init(vc, currcons, 1);
731 if (!*vc->vc_uni_pagedir_loc)
732 con_set_default_unimap(vc);
733 vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL);
734 if (!vc->vc_screenbuf) {
736 vc_cons[currcons].d = NULL;
739 vc->vc_kmalloced = 1;
740 vc_init(vc, vc->vc_rows, vc->vc_cols, 1);
745 static inline int resize_screen(struct vc_data *vc, int width, int height)
747 /* Resizes the resolution of the display adapater */
750 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize)
751 err = vc->vc_sw->con_resize(vc, width, height);
756 * Change # of rows and columns (0 means unchanged/the size of fg_console)
757 * [this is to be used together with some user program
758 * like resize that changes the hardware videomode]
760 #define VC_RESIZE_MAXCOL (32767)
761 #define VC_RESIZE_MAXROW (32767)
762 int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int lines)
764 unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0;
765 unsigned int old_cols, old_rows, old_row_size, old_screen_size;
766 unsigned int new_cols, new_rows, new_row_size, new_screen_size;
768 unsigned short *newscreen;
770 WARN_CONSOLE_UNLOCKED();
775 if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW)
778 new_cols = (cols ? cols : vc->vc_cols);
779 new_rows = (lines ? lines : vc->vc_rows);
780 new_row_size = new_cols << 1;
781 new_screen_size = new_row_size * new_rows;
783 if (new_cols == vc->vc_cols && new_rows == vc->vc_rows)
786 newscreen = (unsigned short *) kmalloc(new_screen_size, GFP_USER);
790 old_rows = vc->vc_rows;
791 old_cols = vc->vc_cols;
792 old_row_size = vc->vc_size_row;
793 old_screen_size = vc->vc_screenbuf_size;
795 err = resize_screen(vc, new_cols, new_rows);
801 vc->vc_rows = new_rows;
802 vc->vc_cols = new_cols;
803 vc->vc_size_row = new_row_size;
804 vc->vc_screenbuf_size = new_screen_size;
806 rlth = min(old_row_size, new_row_size);
807 rrem = new_row_size - rlth;
808 old_origin = vc->vc_origin;
809 new_origin = (long) newscreen;
810 new_scr_end = new_origin + new_screen_size;
812 if (vc->vc_y > new_rows) {
813 if (old_rows - vc->vc_y < new_rows) {
815 * Cursor near the bottom, copy contents from the
818 old_origin += (old_rows - new_rows) * old_row_size;
819 end = vc->vc_scr_end;
822 * Cursor is in no man's land, copy 1/2 screenful
823 * from the top and bottom of cursor position
825 old_origin += (vc->vc_y - new_rows/2) * old_row_size;
826 end = old_origin + (old_row_size * new_rows);
830 * Cursor near the top, copy contents from the top of buffer
832 end = (old_rows > new_rows) ? old_origin +
833 (old_row_size * new_rows) :
838 while (old_origin < end) {
839 scr_memcpyw((unsigned short *) new_origin,
840 (unsigned short *) old_origin, rlth);
842 scr_memsetw((void *)(new_origin + rlth),
843 vc->vc_video_erase_char, rrem);
844 old_origin += old_row_size;
845 new_origin += new_row_size;
847 if (new_scr_end > new_origin)
848 scr_memsetw((void *)new_origin, vc->vc_video_erase_char,
849 new_scr_end - new_origin);
850 if (vc->vc_kmalloced)
851 kfree(vc->vc_screenbuf);
852 vc->vc_screenbuf = newscreen;
853 vc->vc_kmalloced = 1;
854 vc->vc_screenbuf_size = new_screen_size;
857 /* do part of a reset_terminal() */
859 vc->vc_bottom = vc->vc_rows;
860 gotoxy(vc, vc->vc_x, vc->vc_y);
864 struct winsize ws, *cws = &vc->vc_tty->winsize;
866 memset(&ws, 0, sizeof(ws));
867 ws.ws_row = vc->vc_rows;
868 ws.ws_col = vc->vc_cols;
869 ws.ws_ypixel = vc->vc_scan_lines;
870 if ((ws.ws_row != cws->ws_row || ws.ws_col != cws->ws_col) &&
871 vc->vc_tty->pgrp > 0)
872 kill_pg(vc->vc_tty->pgrp, SIGWINCH, 1);
876 if (CON_IS_VISIBLE(vc))
881 int vc_lock_resize(struct vc_data *vc, unsigned int cols, unsigned int lines)
885 acquire_console_sem();
886 rc = vc_resize(vc, cols, lines);
887 release_console_sem();
891 void vc_deallocate(unsigned int currcons)
893 WARN_CONSOLE_UNLOCKED();
895 if (vc_cons_allocated(currcons)) {
896 struct vc_data *vc = vc_cons[currcons].d;
897 vc->vc_sw->con_deinit(vc);
898 module_put(vc->vc_sw->owner);
899 if (vc->vc_kmalloced)
900 kfree(vc->vc_screenbuf);
901 if (currcons >= MIN_NR_CONSOLES)
903 vc_cons[currcons].d = NULL;
911 #define set_kbd(vc, x) set_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
912 #define clr_kbd(vc, x) clr_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
913 #define is_kbd(vc, x) vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
915 #define decarm VC_REPEAT
916 #define decckm VC_CKMODE
917 #define kbdapplic VC_APPLIC
921 * this is what the terminal answers to a ESC-Z or csi0c query.
923 #define VT100ID "\033[?1;2c"
924 #define VT102ID "\033[?6c"
926 unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7,
927 8,12,10,14, 9,13,11,15 };
929 /* the default colour table, for VGA+ colour systems */
930 int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
931 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
932 int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
933 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
934 int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
935 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
938 * gotoxy() must verify all boundaries, because the arguments
939 * might also be negative. If the given position is out of
940 * bounds, the cursor is placed at the nearest margin.
942 static void gotoxy(struct vc_data *vc, int new_x, int new_y)
949 if (new_x >= vc->vc_cols)
950 vc->vc_x = vc->vc_cols - 1;
957 max_y = vc->vc_bottom;
964 else if (new_y >= max_y)
965 vc->vc_y = max_y - 1;
968 vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1);
969 vc->vc_need_wrap = 0;
972 /* for absolute user moves, when decom is set */
973 static void gotoxay(struct vc_data *vc, int new_x, int new_y)
975 gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y);
978 void scrollback(struct vc_data *vc, int lines)
981 lines = vc->vc_rows / 2;
985 void scrollfront(struct vc_data *vc, int lines)
988 lines = vc->vc_rows / 2;
992 static void lf(struct vc_data *vc)
994 /* don't scroll if above bottom of scrolling region, or
995 * if below scrolling region
997 if (vc->vc_y + 1 == vc->vc_bottom)
998 scrup(vc, vc->vc_top, vc->vc_bottom, 1);
999 else if (vc->vc_y < vc->vc_rows - 1) {
1001 vc->vc_pos += vc->vc_size_row;
1003 vc->vc_need_wrap = 0;
1006 static void ri(struct vc_data *vc)
1008 /* don't scroll if below top of scrolling region, or
1009 * if above scrolling region
1011 if (vc->vc_y == vc->vc_top)
1012 scrdown(vc, vc->vc_top, vc->vc_bottom, 1);
1013 else if (vc->vc_y > 0) {
1015 vc->vc_pos -= vc->vc_size_row;
1017 vc->vc_need_wrap = 0;
1020 static inline void cr(struct vc_data *vc)
1022 vc->vc_pos -= vc->vc_x << 1;
1023 vc->vc_need_wrap = vc->vc_x = 0;
1026 static inline void bs(struct vc_data *vc)
1031 vc->vc_need_wrap = 0;
1035 static inline void del(struct vc_data *vc)
1040 static void csi_J(struct vc_data *vc, int vpar)
1043 unsigned short * start;
1046 case 0: /* erase from cursor to end of display */
1047 count = (vc->vc_scr_end - vc->vc_pos) >> 1;
1048 start = (unsigned short *)vc->vc_pos;
1049 if (DO_UPDATE(vc)) {
1050 /* do in two stages */
1051 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1052 vc->vc_cols - vc->vc_x);
1053 vc->vc_sw->con_clear(vc, vc->vc_y + 1, 0,
1054 vc->vc_rows - vc->vc_y - 1,
1058 case 1: /* erase from start to cursor */
1059 count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1;
1060 start = (unsigned short *)vc->vc_origin;
1061 if (DO_UPDATE(vc)) {
1062 /* do in two stages */
1063 vc->vc_sw->con_clear(vc, 0, 0, vc->vc_y,
1065 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1069 case 2: /* erase whole display */
1070 count = vc->vc_cols * vc->vc_rows;
1071 start = (unsigned short *)vc->vc_origin;
1073 vc->vc_sw->con_clear(vc, 0, 0,
1080 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1081 vc->vc_need_wrap = 0;
1084 static void csi_K(struct vc_data *vc, int vpar)
1087 unsigned short * start;
1090 case 0: /* erase from cursor to end of line */
1091 count = vc->vc_cols - vc->vc_x;
1092 start = (unsigned short *)vc->vc_pos;
1094 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1095 vc->vc_cols - vc->vc_x);
1097 case 1: /* erase from start of line to cursor */
1098 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1099 count = vc->vc_x + 1;
1101 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1104 case 2: /* erase whole line */
1105 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1106 count = vc->vc_cols;
1108 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1114 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1115 vc->vc_need_wrap = 0;
1118 static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */
1124 count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar;
1126 scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count);
1128 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count);
1129 vc->vc_need_wrap = 0;
1132 static void default_attr(struct vc_data *vc)
1134 vc->vc_intensity = 1;
1135 vc->vc_underline = 0;
1138 vc->vc_color = vc->vc_def_color;
1141 /* console_sem is held */
1142 static void csi_m(struct vc_data *vc)
1146 for (i = 0; i <= vc->vc_npar; i++)
1147 switch (vc->vc_par[i]) {
1148 case 0: /* all attributes off */
1152 vc->vc_intensity = 2;
1155 vc->vc_intensity = 0;
1158 vc->vc_underline = 1;
1166 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1167 * Select primary font, don't display
1168 * control chars if defined, don't set
1171 vc->vc_translate = set_translate(vc->vc_charset == 0
1173 : vc->vc_G1_charset, vc);
1174 vc->vc_disp_ctrl = 0;
1175 vc->vc_toggle_meta = 0;
1177 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1178 * Select first alternate font, lets
1179 * chars < 32 be displayed as ROM chars.
1181 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1182 vc->vc_disp_ctrl = 1;
1183 vc->vc_toggle_meta = 0;
1185 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1186 * Select second alternate font, toggle
1187 * high bit before displaying as ROM char.
1189 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1190 vc->vc_disp_ctrl = 1;
1191 vc->vc_toggle_meta = 1;
1195 vc->vc_intensity = 1;
1198 vc->vc_underline = 0;
1206 case 38: /* ANSI X3.64-1979 (SCO-ish?)
1207 * Enables underscore, white foreground
1208 * with white underscore (Linux - use
1209 * default foreground).
1211 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1212 vc->vc_underline = 1;
1214 case 39: /* ANSI X3.64-1979 (SCO-ish?)
1215 * Disable underline option.
1216 * Reset colour to default? It did this
1219 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1220 vc->vc_underline = 0;
1223 vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f);
1226 if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37)
1227 vc->vc_color = color_table[vc->vc_par[i] - 30]
1228 | (vc->vc_color & 0xf0);
1229 else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47)
1230 vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4)
1231 | (vc->vc_color & 0x0f);
1237 static void respond_string(const char *p, struct tty_struct *tty)
1240 tty_insert_flip_char(tty, *p, 0);
1243 con_schedule_flip(tty);
1246 static void cursor_report(struct vc_data *vc, struct tty_struct *tty)
1250 sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1);
1251 respond_string(buf, tty);
1254 static inline void status_report(struct tty_struct *tty)
1256 respond_string("\033[0n", tty); /* Terminal ok */
1259 static inline void respond_ID(struct tty_struct * tty)
1261 respond_string(VT102ID, tty);
1264 void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry)
1268 sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx),
1270 respond_string(buf, tty);
1273 /* invoked via ioctl(TIOCLINUX) and through set_selection */
1274 int mouse_reporting(void)
1276 return vc_cons[fg_console].d->vc_report_mouse;
1279 /* console_sem is held */
1280 static void set_mode(struct vc_data *vc, int on_off)
1284 for (i = 0; i <= vc->vc_npar; i++)
1286 switch(vc->vc_par[i]) { /* DEC private modes set/reset */
1287 case 1: /* Cursor keys send ^[Ox/^[[x */
1289 set_kbd(vc, decckm);
1291 clr_kbd(vc, decckm);
1293 case 3: /* 80/132 mode switch unimplemented */
1294 vc->vc_deccolm = on_off;
1296 vc_resize(deccolm ? 132 : 80, vc->vc_rows);
1297 /* this alone does not suffice; some user mode
1298 utility has to change the hardware regs */
1301 case 5: /* Inverted screen on/off */
1302 if (vc->vc_decscnm != on_off) {
1303 vc->vc_decscnm = on_off;
1304 invert_screen(vc, 0, vc->vc_screenbuf_size, 0);
1308 case 6: /* Origin relative/absolute */
1309 vc->vc_decom = on_off;
1312 case 7: /* Autowrap on/off */
1313 vc->vc_decawm = on_off;
1315 case 8: /* Autorepeat on/off */
1317 set_kbd(vc, decarm);
1319 clr_kbd(vc, decarm);
1322 vc->vc_report_mouse = on_off ? 1 : 0;
1324 case 25: /* Cursor on/off */
1325 vc->vc_deccm = on_off;
1328 vc->vc_report_mouse = on_off ? 2 : 0;
1332 switch(vc->vc_par[i]) { /* ANSI modes set/reset */
1333 case 3: /* Monitor (display ctrls) */
1334 vc->vc_disp_ctrl = on_off;
1336 case 4: /* Insert Mode on/off */
1337 vc->vc_decim = on_off;
1339 case 20: /* Lf, Enter == CrLf/Lf */
1349 /* console_sem is held */
1350 static void setterm_command(struct vc_data *vc)
1352 switch(vc->vc_par[0]) {
1353 case 1: /* set color for underline mode */
1354 if (vc->vc_can_do_color &&
1355 vc->vc_par[1] < 16) {
1356 vc->vc_ulcolor = color_table[vc->vc_par[1]];
1357 if (vc->vc_underline)
1361 case 2: /* set color for half intensity mode */
1362 if (vc->vc_can_do_color &&
1363 vc->vc_par[1] < 16) {
1364 vc->vc_halfcolor = color_table[vc->vc_par[1]];
1365 if (vc->vc_intensity == 0)
1369 case 8: /* store colors as defaults */
1370 vc->vc_def_color = vc->vc_attr;
1371 if (vc->vc_hi_font_mask == 0x100)
1372 vc->vc_def_color >>= 1;
1376 case 9: /* set blanking interval */
1377 blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1378 poke_blanked_console();
1380 case 10: /* set bell frequency in Hz */
1381 if (vc->vc_npar >= 1)
1382 vc->vc_bell_pitch = vc->vc_par[1];
1384 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1386 case 11: /* set bell duration in msec */
1387 if (vc->vc_npar >= 1)
1388 vc->vc_bell_duration = (vc->vc_par[1] < 2000) ?
1389 vc->vc_par[1] * HZ / 1000 : 0;
1391 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1393 case 12: /* bring specified console to the front */
1394 if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1))
1395 set_console(vc->vc_par[1] - 1);
1397 case 13: /* unblank the screen */
1398 poke_blanked_console();
1400 case 14: /* set vesa powerdown interval */
1401 vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1403 case 15: /* activate the previous console */
1404 set_console(last_console);
1409 /* console_sem is held */
1410 static void csi_at(struct vc_data *vc, unsigned int nr)
1412 if (nr > vc->vc_cols - vc->vc_x)
1413 nr = vc->vc_cols - vc->vc_x;
1416 insert_char(vc, nr);
1419 /* console_sem is held */
1420 static void csi_L(struct vc_data *vc, unsigned int nr)
1422 if (nr > vc->vc_rows - vc->vc_y)
1423 nr = vc->vc_rows - vc->vc_y;
1426 scrdown(vc, vc->vc_y, vc->vc_bottom, nr);
1427 vc->vc_need_wrap = 0;
1430 /* console_sem is held */
1431 static void csi_P(struct vc_data *vc, unsigned int nr)
1433 if (nr > vc->vc_cols - vc->vc_x)
1434 nr = vc->vc_cols - vc->vc_x;
1437 delete_char(vc, nr);
1440 /* console_sem is held */
1441 static void csi_M(struct vc_data *vc, unsigned int nr)
1443 if (nr > vc->vc_rows - vc->vc_y)
1444 nr = vc->vc_rows - vc->vc_y;
1447 scrup(vc, vc->vc_y, vc->vc_bottom, nr);
1448 vc->vc_need_wrap = 0;
1451 /* console_sem is held (except via vc_init->reset_terminal */
1452 static void save_cur(struct vc_data *vc)
1454 vc->vc_saved_x = vc->vc_x;
1455 vc->vc_saved_y = vc->vc_y;
1456 vc->vc_s_intensity = vc->vc_intensity;
1457 vc->vc_s_underline = vc->vc_underline;
1458 vc->vc_s_blink = vc->vc_blink;
1459 vc->vc_s_reverse = vc->vc_reverse;
1460 vc->vc_s_charset = vc->vc_charset;
1461 vc->vc_s_color = vc->vc_color;
1462 vc->vc_saved_G0 = vc->vc_G0_charset;
1463 vc->vc_saved_G1 = vc->vc_G1_charset;
1466 /* console_sem is held */
1467 static void restore_cur(struct vc_data *vc)
1469 gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y);
1470 vc->vc_intensity = vc->vc_s_intensity;
1471 vc->vc_underline = vc->vc_s_underline;
1472 vc->vc_blink = vc->vc_s_blink;
1473 vc->vc_reverse = vc->vc_s_reverse;
1474 vc->vc_charset = vc->vc_s_charset;
1475 vc->vc_color = vc->vc_s_color;
1476 vc->vc_G0_charset = vc->vc_saved_G0;
1477 vc->vc_G1_charset = vc->vc_saved_G1;
1478 vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc);
1480 vc->vc_need_wrap = 0;
1483 enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey,
1484 EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd,
1487 /* console_sem is held (except via vc_init()) */
1488 static void reset_terminal(struct vc_data *vc, int do_clear)
1491 vc->vc_bottom = vc->vc_rows;
1492 vc->vc_state = ESnormal;
1494 vc->vc_translate = set_translate(LAT1_MAP, vc);
1495 vc->vc_G0_charset = LAT1_MAP;
1496 vc->vc_G1_charset = GRAF_MAP;
1498 vc->vc_need_wrap = 0;
1499 vc->vc_report_mouse = 0;
1501 vc->vc_utf_count = 0;
1503 vc->vc_disp_ctrl = 0;
1504 vc->vc_toggle_meta = 0;
1512 set_kbd(vc, decarm);
1513 clr_kbd(vc, decckm);
1514 clr_kbd(vc, kbdapplic);
1516 kbd_table[vc->vc_num].lockstate = 0;
1517 kbd_table[vc->vc_num].slockstate = 0;
1518 kbd_table[vc->vc_num].ledmode = LED_SHOW_FLAGS;
1519 kbd_table[vc->vc_num].ledflagstate = kbd_table[vc->vc_num].default_ledflagstate;
1520 /* do not do set_leds here because this causes an endless tasklet loop
1521 when the keyboard hasn't been initialized yet */
1523 vc->vc_cursor_type = CUR_DEFAULT;
1524 vc->vc_complement_mask = vc->vc_s_complement_mask;
1529 vc->vc_tab_stop[0] = 0x01010100;
1530 vc->vc_tab_stop[1] =
1531 vc->vc_tab_stop[2] =
1532 vc->vc_tab_stop[3] =
1533 vc->vc_tab_stop[4] = 0x01010101;
1535 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1536 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1544 /* console_sem is held */
1545 static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
1548 * Control characters can be used in the _middle_
1549 * of an escape sequence.
1555 if (vc->vc_bell_duration)
1556 kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration);
1562 vc->vc_pos -= (vc->vc_x << 1);
1563 while (vc->vc_x < vc->vc_cols - 1) {
1565 if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31)))
1568 vc->vc_pos += (vc->vc_x << 1);
1570 case 10: case 11: case 12:
1572 if (!is_kbd(vc, lnm))
1579 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1580 vc->vc_disp_ctrl = 1;
1584 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1585 vc->vc_disp_ctrl = 0;
1588 vc->vc_state = ESnormal;
1591 vc->vc_state = ESesc;
1597 vc->vc_state = ESsquare;
1600 switch(vc->vc_state) {
1602 vc->vc_state = ESnormal;
1605 vc->vc_state = ESsquare;
1608 vc->vc_state = ESnonstd;
1611 vc->vc_state = ESpercent;
1624 vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31));
1636 vc->vc_state = ESsetG0;
1639 vc->vc_state = ESsetG1;
1642 vc->vc_state = EShash;
1645 reset_terminal(vc, 1);
1647 case '>': /* Numeric keypad */
1648 clr_kbd(vc, kbdapplic);
1650 case '=': /* Appl. keypad */
1651 set_kbd(vc, kbdapplic);
1656 if (c=='P') { /* palette escape sequence */
1657 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1658 vc->vc_par[vc->vc_npar] = 0;
1660 vc->vc_state = ESpalette;
1662 } else if (c=='R') { /* reset palette */
1664 vc->vc_state = ESnormal;
1666 vc->vc_state = ESnormal;
1669 if ( (c>='0'&&c<='9') || (c>='A'&&c<='F') || (c>='a'&&c<='f') ) {
1670 vc->vc_par[vc->vc_npar++] = (c > '9' ? (c & 0xDF) - 'A' + 10 : c - '0');
1671 if (vc->vc_npar == 7) {
1672 int i = vc->vc_par[0] * 3, j = 1;
1673 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1674 vc->vc_palette[i++] += vc->vc_par[j++];
1675 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1676 vc->vc_palette[i++] += vc->vc_par[j++];
1677 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1678 vc->vc_palette[i] += vc->vc_par[j];
1680 vc->vc_state = ESnormal;
1683 vc->vc_state = ESnormal;
1686 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1687 vc->vc_par[vc->vc_npar] = 0;
1689 vc->vc_state = ESgetpars;
1690 if (c == '[') { /* Function key */
1691 vc->vc_state=ESfunckey;
1694 vc->vc_ques = (c == '?');
1698 if (c == ';' && vc->vc_npar < NPAR - 1) {
1701 } else if (c>='0' && c<='9') {
1702 vc->vc_par[vc->vc_npar] *= 10;
1703 vc->vc_par[vc->vc_npar] += c - '0';
1706 vc->vc_state = ESgotpars;
1708 vc->vc_state = ESnormal;
1719 vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16);
1721 vc->vc_cursor_type = CUR_DEFAULT;
1729 vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1];
1731 vc->vc_complement_mask = vc->vc_s_complement_mask;
1737 if (vc->vc_par[0] == 5)
1739 else if (vc->vc_par[0] == 6)
1740 cursor_report(vc, tty);
1752 gotoxy(vc, vc->vc_par[0], vc->vc_y);
1757 gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]);
1762 gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]);
1767 gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y);
1772 gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y);
1777 gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]);
1782 gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]);
1787 gotoxay(vc, vc->vc_x ,vc->vc_par[0]);
1794 gotoxay(vc, vc->vc_par[1], vc->vc_par[0]);
1797 csi_J(vc, vc->vc_par[0]);
1800 csi_K(vc, vc->vc_par[0]);
1803 csi_L(vc, vc->vc_par[0]);
1806 csi_M(vc, vc->vc_par[0]);
1809 csi_P(vc, vc->vc_par[0]);
1817 vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31));
1818 else if (vc->vc_par[0] == 3) {
1819 vc->vc_tab_stop[0] =
1820 vc->vc_tab_stop[1] =
1821 vc->vc_tab_stop[2] =
1822 vc->vc_tab_stop[3] =
1823 vc->vc_tab_stop[4] = 0;
1829 case 'q': /* DECLL - but only 3 leds */
1830 /* map 0,1,2,3 to 0,1,2,4 */
1831 if (vc->vc_par[0] < 4)
1832 setledstate(kbd_table + vc->vc_num,
1833 (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4);
1839 vc->vc_par[1] = vc->vc_rows;
1840 /* Minimum allowed region is 2 lines */
1841 if (vc->vc_par[0] < vc->vc_par[1] &&
1842 vc->vc_par[1] <= vc->vc_rows) {
1843 vc->vc_top = vc->vc_par[0] - 1;
1844 vc->vc_bottom = vc->vc_par[1];
1855 csi_X(vc, vc->vc_par[0]);
1858 csi_at(vc, vc->vc_par[0]);
1860 case ']': /* setterm functions */
1861 setterm_command(vc);
1866 vc->vc_state = ESnormal;
1868 case '@': /* defined in ISO 2022 */
1871 case 'G': /* prelim official escape code */
1872 case '8': /* retained for compatibility */
1878 vc->vc_state = ESnormal;
1881 vc->vc_state = ESnormal;
1883 /* DEC screen alignment test. kludge :-) */
1884 vc->vc_video_erase_char =
1885 (vc->vc_video_erase_char & 0xff00) | 'E';
1887 vc->vc_video_erase_char =
1888 (vc->vc_video_erase_char & 0xff00) | ' ';
1889 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
1894 vc->vc_G0_charset = GRAF_MAP;
1896 vc->vc_G0_charset = LAT1_MAP;
1898 vc->vc_G0_charset = IBMPC_MAP;
1900 vc->vc_G0_charset = USER_MAP;
1901 if (vc->vc_charset == 0)
1902 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1903 vc->vc_state = ESnormal;
1907 vc->vc_G1_charset = GRAF_MAP;
1909 vc->vc_G1_charset = LAT1_MAP;
1911 vc->vc_G1_charset = IBMPC_MAP;
1913 vc->vc_G1_charset = USER_MAP;
1914 if (vc->vc_charset == 1)
1915 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1916 vc->vc_state = ESnormal;
1919 vc->vc_state = ESnormal;
1923 /* This is a temporary buffer used to prepare a tty console write
1924 * so that we can easily avoid touching user space while holding the
1925 * console spinlock. It is allocated in con_init and is shared by
1926 * this code and the vc_screen read/write tty calls.
1928 * We have to allocate this statically in the kernel data section
1929 * since console_init (and thus con_init) are called before any
1930 * kernel memory allocation is available.
1932 char con_buf[CON_BUF_SIZE];
1933 DECLARE_MUTEX(con_buf_sem);
1935 /* acquires console_sem */
1936 static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count)
1938 #ifdef VT_BUF_VRAM_ONLY
1939 #define FLUSH do { } while(0);
1941 #define FLUSH if (draw_x >= 0) { \
1942 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
1947 int c, tc, ok, n = 0, draw_x = -1;
1948 unsigned int currcons;
1949 unsigned long draw_from = 0, draw_to = 0;
1951 u16 himask, charmask;
1952 const unsigned char *orig_buf = NULL;
1960 acquire_console_sem();
1961 vc = tty->driver_data;
1963 printk(KERN_ERR "vt: argh, driver_data is NULL !\n");
1964 release_console_sem();
1968 currcons = vc->vc_num;
1969 if (!vc_cons_allocated(currcons)) {
1970 /* could this happen? */
1971 static int error = 0;
1974 printk("con_write: tty %d not allocated\n", currcons+1);
1976 release_console_sem();
1979 release_console_sem();
1984 /* At this point 'buf' is guaranteed to be a kernel buffer
1985 * and therefore no access to userspace (and therefore sleeping)
1986 * will be needed. The con_buf_sem serializes all tty based
1987 * console rendering and vcs write/read operations. We hold
1988 * the console spinlock during the entire write.
1991 acquire_console_sem();
1993 vc = tty->driver_data;
1995 printk(KERN_ERR "vt: argh, driver_data _became_ NULL !\n");
1996 release_console_sem();
2000 himask = vc->vc_hi_font_mask;
2001 charmask = himask ? 0x1ff : 0xff;
2003 /* undraw cursor first */
2007 while (!tty->stopped && count) {
2014 /* Do no translation at all in control states */
2015 if (vc->vc_state != ESnormal) {
2017 } else if (vc->vc_utf) {
2018 /* Combine UTF-8 into Unicode */
2019 /* Incomplete characters silently ignored */
2021 if (vc->vc_utf_count > 0 && (c & 0xc0) == 0x80) {
2022 vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f);
2024 if (vc->vc_utf_count == 0)
2025 tc = c = vc->vc_utf_char;
2028 if ((c & 0xe0) == 0xc0) {
2029 vc->vc_utf_count = 1;
2030 vc->vc_utf_char = (c & 0x1f);
2031 } else if ((c & 0xf0) == 0xe0) {
2032 vc->vc_utf_count = 2;
2033 vc->vc_utf_char = (c & 0x0f);
2034 } else if ((c & 0xf8) == 0xf0) {
2035 vc->vc_utf_count = 3;
2036 vc->vc_utf_char = (c & 0x07);
2037 } else if ((c & 0xfc) == 0xf8) {
2038 vc->vc_utf_count = 4;
2039 vc->vc_utf_char = (c & 0x03);
2040 } else if ((c & 0xfe) == 0xfc) {
2041 vc->vc_utf_count = 5;
2042 vc->vc_utf_char = (c & 0x01);
2044 vc->vc_utf_count = 0;
2049 vc->vc_utf_count = 0;
2051 } else { /* no utf */
2052 tc = vc->vc_translate[vc->vc_toggle_meta ? (c | 0x80) : c];
2055 /* If the original code was a control character we
2056 * only allow a glyph to be displayed if the code is
2057 * not normally used (such as for cursor movement) or
2058 * if the disp_ctrl mode has been explicitly enabled.
2059 * Certain characters (as given by the CTRL_ALWAYS
2060 * bitmap) are always displayed as control characters,
2061 * as the console would be pretty useless without
2062 * them; to display an arbitrary font position use the
2063 * direct-to-font zone in UTF-8 mode.
2065 ok = tc && (c >= 32 ||
2066 (!vc->vc_utf && !(((vc->vc_disp_ctrl ? CTRL_ALWAYS
2067 : CTRL_ACTION) >> c) & 1)))
2068 && (c != 127 || vc->vc_disp_ctrl)
2071 if (vc->vc_state == ESnormal && ok) {
2072 /* Now try to find out how to display it */
2073 tc = conv_uni_to_pc(vc, tc);
2075 /* If we got -4 (not found) then see if we have
2076 defined a replacement character (U+FFFD) */
2077 tc = conv_uni_to_pc(vc, 0xfffd);
2079 /* One reason for the -4 can be that we just
2080 did a clear_unimap();
2081 try at least to show something. */
2084 } else if ( tc == -3 ) {
2085 /* Bad hash table -- hope for the best */
2089 continue; /* Conversion failed */
2091 if (vc->vc_need_wrap || vc->vc_decim)
2093 if (vc->vc_need_wrap) {
2100 ((vc->vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) :
2101 (vc->vc_attr << 8) + tc,
2102 (u16 *) vc->vc_pos);
2103 if (DO_UPDATE(vc) && draw_x < 0) {
2105 draw_from = vc->vc_pos;
2107 if (vc->vc_x == vc->vc_cols - 1) {
2108 vc->vc_need_wrap = vc->vc_decawm;
2109 draw_to = vc->vc_pos + 2;
2112 draw_to = (vc->vc_pos += 2);
2117 do_con_trol(tty, vc, orig);
2120 console_conditional_schedule();
2121 release_console_sem();
2129 * This is the console switching callback.
2131 * Doing console switching in a process context allows
2132 * us to do the switches asynchronously (needed when we want
2133 * to switch due to a keyboard interrupt). Synchronization
2134 * with other console code and prevention of re-entrancy is
2135 * ensured with console_sem.
2137 static void console_callback(void *ignored)
2139 acquire_console_sem();
2141 if (want_console >= 0) {
2142 if (want_console != fg_console &&
2143 vc_cons_allocated(want_console)) {
2144 hide_cursor(vc_cons[fg_console].d);
2145 change_console(vc_cons[want_console].d);
2146 /* we only changed when the console had already
2147 been allocated - a new console is not created
2148 in an interrupt routine */
2152 if (do_poke_blanked_console) { /* do not unblank for a LED change */
2153 do_poke_blanked_console = 0;
2154 poke_blanked_console();
2156 if (scrollback_delta) {
2157 struct vc_data *vc = vc_cons[fg_console].d;
2159 if (vc->vc_mode == KD_TEXT)
2160 vc->vc_sw->con_scrolldelta(vc, scrollback_delta);
2161 scrollback_delta = 0;
2163 if (blank_timer_expired) {
2165 blank_timer_expired = 0;
2168 release_console_sem();
2171 void set_console(int nr)
2174 schedule_console_callback();
2177 struct tty_driver *console_driver;
2179 #ifdef CONFIG_VT_CONSOLE
2182 * Console on virtual terminal
2184 * The console must be locked when we get here.
2187 static void vt_console_print(struct console *co, const char *b, unsigned count)
2189 struct vc_data *vc = vc_cons[fg_console].d;
2191 static unsigned long printing;
2192 const ushort *start;
2196 /* console busy or not yet initialized */
2197 if (!printable || test_and_set_bit(0, &printing))
2200 if (kmsg_redirect && vc_cons_allocated(kmsg_redirect - 1))
2201 vc = vc_cons[kmsg_redirect - 1].d;
2203 /* read `x' only after setting currcons properly (otherwise
2204 the `x' macro will read the x of the foreground console). */
2207 if (!vc_cons_allocated(fg_console)) {
2209 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2213 if (vc->vc_mode != KD_TEXT)
2216 /* undraw cursor first */
2220 start = (ushort *)vc->vc_pos;
2222 /* Contrived structure to try to emulate original need_wrap behaviour
2223 * Problems caused when we have need_wrap set on '\n' character */
2226 if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) {
2228 if (CON_IS_VISIBLE(vc))
2229 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2231 if (vc->vc_need_wrap)
2235 if (c == 8) { /* backspace */
2237 start = (ushort *)vc->vc_pos;
2244 start = (ushort *)vc->vc_pos;
2246 if (c == 10 || c == 13)
2249 scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos);
2251 if (myx == vc->vc_cols - 1) {
2252 vc->vc_need_wrap = 1;
2259 if (CON_IS_VISIBLE(vc))
2260 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2262 if (vc->vc_x == vc->vc_cols) {
2264 vc->vc_need_wrap = 1;
2270 clear_bit(0, &printing);
2273 static struct tty_driver *vt_console_device(struct console *c, int *index)
2275 *index = c->index ? c->index-1 : fg_console;
2276 return console_driver;
2279 static struct console vt_console_driver = {
2281 .write = vt_console_print,
2282 .device = vt_console_device,
2283 .unblank = unblank_screen,
2284 .flags = CON_PRINTBUFFER,
2290 * Handling of Linux-specific VC ioctls
2294 * Generally a bit racy with respect to console_sem().
2296 * There are some functions which don't need it.
2298 * There are some functions which can sleep for arbitrary periods
2299 * (paste_selection) but we don't need the lock there anyway.
2301 * set_selection has locking, and definitely needs it
2304 int tioclinux(struct tty_struct *tty, unsigned long arg)
2307 char __user *p = (char __user *)arg;
2311 if (tty->driver->type != TTY_DRIVER_TYPE_CONSOLE)
2313 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN))
2315 if (get_user(type, p))
2321 acquire_console_sem();
2322 ret = set_selection((struct tiocl_selection __user *)(p+1), tty);
2323 release_console_sem();
2325 case TIOCL_PASTESEL:
2326 ret = paste_selection(tty);
2328 case TIOCL_UNBLANKSCREEN:
2329 acquire_console_sem();
2331 release_console_sem();
2333 case TIOCL_SELLOADLUT:
2334 ret = sel_loadlut(p);
2336 case TIOCL_GETSHIFTSTATE:
2339 * Make it possible to react to Shift+Mousebutton.
2340 * Note that 'shift_state' is an undocumented
2341 * kernel-internal variable; programs not closely
2342 * related to the kernel should not use this.
2345 ret = __put_user(data, p);
2347 case TIOCL_GETMOUSEREPORTING:
2348 data = mouse_reporting();
2349 ret = __put_user(data, p);
2351 case TIOCL_SETVESABLANK:
2352 set_vesa_blanking(p);
2354 case TIOCL_GETKMSGREDIRECT:
2355 data = kmsg_redirect;
2356 ret = __put_user(data, p);
2358 case TIOCL_SETKMSGREDIRECT:
2359 if (!capable(CAP_SYS_ADMIN)) {
2362 if (get_user(data, p+1))
2365 kmsg_redirect = data;
2368 case TIOCL_GETFGCONSOLE:
2371 case TIOCL_SCROLLCONSOLE:
2372 if (get_user(lines, (s32 __user *)(p+4))) {
2375 scrollfront(vc_cons[fg_console].d, lines);
2379 case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
2380 acquire_console_sem();
2383 release_console_sem();
2385 case TIOCL_BLANKEDSCREEN:
2386 ret = console_blanked;
2396 * /dev/ttyN handling
2399 static int con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2403 retval = do_con_write(tty, buf, count);
2404 con_flush_chars(tty);
2409 static void con_put_char(struct tty_struct *tty, unsigned char ch)
2412 return; /* n_r3964 calls put_char() from interrupt context */
2413 do_con_write(tty, &ch, 1);
2416 static int con_write_room(struct tty_struct *tty)
2420 return 4096; /* No limit, really; we're not buffering */
2423 static int con_chars_in_buffer(struct tty_struct *tty)
2425 return 0; /* we're not buffering */
2429 * con_throttle and con_unthrottle are only used for
2430 * paste_selection(), which has to stuff in a large number of
2433 static void con_throttle(struct tty_struct *tty)
2437 static void con_unthrottle(struct tty_struct *tty)
2439 struct vc_data *vc = tty->driver_data;
2441 wake_up_interruptible(&vc->paste_wait);
2445 * Turn the Scroll-Lock LED on when the tty is stopped
2447 static void con_stop(struct tty_struct *tty)
2452 console_num = tty->index;
2453 if (!vc_cons_allocated(console_num))
2455 set_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2460 * Turn the Scroll-Lock LED off when the console is started
2462 static void con_start(struct tty_struct *tty)
2467 console_num = tty->index;
2468 if (!vc_cons_allocated(console_num))
2470 clr_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2474 static void con_flush_chars(struct tty_struct *tty)
2478 if (in_interrupt()) /* from flush_to_ldisc */
2481 /* if we race with con_close(), vt may be null */
2482 acquire_console_sem();
2483 vc = tty->driver_data;
2486 release_console_sem();
2490 * Allocate the console screen memory.
2492 static int con_open(struct tty_struct *tty, struct file *filp)
2494 unsigned int currcons = tty->index;
2497 acquire_console_sem();
2498 if (tty->driver_data == NULL) {
2499 ret = vc_allocate(currcons);
2501 struct vc_data *vc = vc_cons[currcons].d;
2502 tty->driver_data = vc;
2505 if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
2506 tty->winsize.ws_row = vc_cons[currcons].d->vc_rows;
2507 tty->winsize.ws_col = vc_cons[currcons].d->vc_cols;
2509 release_console_sem();
2510 vcs_make_devfs(tty);
2514 release_console_sem();
2519 * We take tty_mutex in here to prevent another thread from coming in via init_dev
2520 * and taking a ref against the tty while we're in the process of forgetting
2521 * about it and cleaning things up.
2523 * This is because vcs_remove_devfs() can sleep and will drop the BKL.
2525 static void con_close(struct tty_struct *tty, struct file *filp)
2527 mutex_lock(&tty_mutex);
2528 acquire_console_sem();
2529 if (tty && tty->count == 1) {
2530 struct vc_data *vc = tty->driver_data;
2534 tty->driver_data = NULL;
2535 release_console_sem();
2536 vcs_remove_devfs(tty);
2537 mutex_unlock(&tty_mutex);
2539 * tty_mutex is released, but we still hold BKL, so there is
2540 * still exclusion against init_dev()
2544 release_console_sem();
2545 mutex_unlock(&tty_mutex);
2548 static void vc_init(struct vc_data *vc, unsigned int rows,
2549 unsigned int cols, int do_clear)
2555 vc->vc_size_row = cols << 1;
2556 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
2559 vc->vc_pos = vc->vc_origin;
2561 for (j=k=0; j<16; j++) {
2562 vc->vc_palette[k++] = default_red[j] ;
2563 vc->vc_palette[k++] = default_grn[j] ;
2564 vc->vc_palette[k++] = default_blu[j] ;
2566 vc->vc_def_color = 0x07; /* white */
2567 vc->vc_ulcolor = 0x0f; /* bold white */
2568 vc->vc_halfcolor = 0x08; /* grey */
2569 init_waitqueue_head(&vc->paste_wait);
2570 reset_terminal(vc, do_clear);
2574 * This routine initializes console interrupts, and does nothing
2575 * else. If you want the screen to clear, call tty_write with
2576 * the appropriate escape-sequence.
2579 static int __init con_init(void)
2581 const char *display_desc = NULL;
2583 unsigned int currcons = 0, i;
2585 acquire_console_sem();
2588 display_desc = conswitchp->con_startup();
2589 if (!display_desc) {
2591 release_console_sem();
2595 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2596 struct con_driver *con_driver = ®istered_con_driver[i];
2598 if (con_driver->con == NULL) {
2599 con_driver->con = conswitchp;
2600 con_driver->desc = display_desc;
2601 con_driver->flag = CON_DRIVER_FLAG_INIT;
2602 con_driver->first = 0;
2603 con_driver->last = MAX_NR_CONSOLES - 1;
2608 for (i = 0; i < MAX_NR_CONSOLES; i++)
2609 con_driver_map[i] = conswitchp;
2611 init_timer(&console_timer);
2612 console_timer.function = blank_screen_t;
2613 if (blankinterval) {
2614 blank_state = blank_normal_wait;
2615 mod_timer(&console_timer, jiffies + blankinterval);
2619 * kmalloc is not running yet - we use the bootmem allocator.
2621 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) {
2622 vc_cons[currcons].d = vc = alloc_bootmem(sizeof(struct vc_data));
2623 visual_init(vc, currcons, 1);
2624 vc->vc_screenbuf = (unsigned short *)alloc_bootmem(vc->vc_screenbuf_size);
2625 vc->vc_kmalloced = 0;
2626 vc_init(vc, vc->vc_rows, vc->vc_cols,
2627 currcons || !vc->vc_sw->con_save_screen);
2629 currcons = fg_console = 0;
2630 master_display_fg = vc = vc_cons[currcons].d;
2633 gotoxy(vc, vc->vc_x, vc->vc_y);
2636 printk("Console: %s %s %dx%d",
2637 vc->vc_can_do_color ? "colour" : "mono",
2638 display_desc, vc->vc_cols, vc->vc_rows);
2642 release_console_sem();
2644 #ifdef CONFIG_VT_CONSOLE
2645 register_console(&vt_console_driver);
2649 console_initcall(con_init);
2651 static struct tty_operations con_ops = {
2655 .write_room = con_write_room,
2656 .put_char = con_put_char,
2657 .flush_chars = con_flush_chars,
2658 .chars_in_buffer = con_chars_in_buffer,
2662 .throttle = con_throttle,
2663 .unthrottle = con_unthrottle,
2666 int __init vty_init(void)
2670 console_driver = alloc_tty_driver(MAX_NR_CONSOLES);
2671 if (!console_driver)
2672 panic("Couldn't allocate console driver\n");
2673 console_driver->owner = THIS_MODULE;
2674 console_driver->name = "tty";
2675 console_driver->name_base = 1;
2676 console_driver->major = TTY_MAJOR;
2677 console_driver->minor_start = 1;
2678 console_driver->type = TTY_DRIVER_TYPE_CONSOLE;
2679 console_driver->init_termios = tty_std_termios;
2680 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS;
2681 tty_set_operations(console_driver, &con_ops);
2682 if (tty_register_driver(console_driver))
2683 panic("Couldn't register console driver\n");
2687 #ifdef CONFIG_PROM_CONSOLE
2690 #ifdef CONFIG_MDA_CONSOLE
2696 #ifndef VT_SINGLE_DRIVER
2697 #include <linux/device.h>
2699 static struct class *vtconsole_class;
2701 static int bind_con_driver(const struct consw *csw, int first, int last,
2704 struct module *owner = csw->owner;
2705 const char *desc = NULL;
2706 struct con_driver *con_driver;
2707 int i, j = -1, k = -1, retval = -ENODEV;
2709 if (!try_module_get(owner))
2712 acquire_console_sem();
2714 /* check if driver is registered */
2715 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2716 con_driver = ®istered_con_driver[i];
2718 if (con_driver->con == csw) {
2719 desc = con_driver->desc;
2728 if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) {
2730 con_driver->flag |= CON_DRIVER_FLAG_INIT;
2735 module_put(conswitchp->owner);
2737 __module_get(owner);
2741 first = max(first, con_driver->first);
2742 last = min(last, con_driver->last);
2744 for (i = first; i <= last; i++) {
2746 struct vc_data *vc = vc_cons[i].d;
2748 if (con_driver_map[i])
2749 module_put(con_driver_map[i]->owner);
2750 __module_get(owner);
2751 con_driver_map[i] = csw;
2753 if (!vc || !vc->vc_sw)
2758 if (CON_IS_VISIBLE(vc)) {
2763 old_was_color = vc->vc_can_do_color;
2764 vc->vc_sw->con_deinit(vc);
2765 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
2766 visual_init(vc, i, 0);
2770 /* If the console changed between mono <-> color, then
2771 * the attributes in the screenbuf will be wrong. The
2772 * following resets all attributes to something sane.
2774 if (old_was_color != vc->vc_can_do_color)
2775 clear_buffer_attributes(vc);
2778 printk("Console: switching ");
2780 printk("consoles %d-%d ", first+1, last+1);
2782 struct vc_data *vc = vc_cons[j].d;
2784 printk("to %s %s %dx%d\n",
2785 vc->vc_can_do_color ? "colour" : "mono",
2786 desc, vc->vc_cols, vc->vc_rows);
2793 printk("to %s\n", desc);
2797 release_console_sem();
2802 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
2803 static int con_is_graphics(const struct consw *csw, int first, int last)
2807 for (i = first; i <= last; i++) {
2808 struct vc_data *vc = vc_cons[i].d;
2810 if (vc && vc->vc_mode == KD_GRAPHICS) {
2819 static int unbind_con_driver(const struct consw *csw, int first, int last,
2822 struct module *owner = csw->owner;
2823 const struct consw *defcsw = NULL;
2824 struct con_driver *con_driver = NULL, *con_back = NULL;
2825 int i, retval = -ENODEV;
2827 if (!try_module_get(owner))
2830 acquire_console_sem();
2832 /* check if driver is registered and if it is unbindable */
2833 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2834 con_driver = ®istered_con_driver[i];
2836 if (con_driver->con == csw &&
2837 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
2844 release_console_sem();
2850 /* check if backup driver exists */
2851 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2852 con_back = ®istered_con_driver[i];
2854 if (con_back->con &&
2855 !(con_back->flag & CON_DRIVER_FLAG_MODULE)) {
2856 defcsw = con_back->con;
2863 release_console_sem();
2867 if (!con_is_bound(csw)) {
2868 release_console_sem();
2872 first = max(first, con_driver->first);
2873 last = min(last, con_driver->last);
2875 for (i = first; i <= last; i++) {
2876 if (con_driver_map[i] == csw) {
2877 module_put(csw->owner);
2878 con_driver_map[i] = NULL;
2882 if (!con_is_bound(defcsw)) {
2883 const struct consw *defconsw = conswitchp;
2885 defcsw->con_startup();
2886 con_back->flag |= CON_DRIVER_FLAG_INIT;
2888 * vgacon may change the default driver to point
2889 * to dummycon, we restore it here...
2891 conswitchp = defconsw;
2894 if (!con_is_bound(csw))
2895 con_driver->flag &= ~CON_DRIVER_FLAG_INIT;
2897 release_console_sem();
2898 /* ignore return value, binding should not fail */
2899 bind_con_driver(defcsw, first, last, deflt);
2906 static int vt_bind(struct con_driver *con)
2908 const struct consw *defcsw = NULL, *csw = NULL;
2909 int i, more = 1, first = -1, last = -1, deflt = 0;
2911 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
2912 con_is_graphics(con->con, con->first, con->last))
2917 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2918 struct con_driver *con = ®istered_con_driver[i];
2920 if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) {
2932 for (i = con->first; i <= con->last; i++) {
2933 if (con_driver_map[i] == defcsw) {
2938 } else if (first != -1)
2942 if (first == 0 && last == MAX_NR_CONSOLES -1)
2946 bind_con_driver(csw, first, last, deflt);
2957 static int vt_unbind(struct con_driver *con)
2959 const struct consw *csw = NULL;
2960 int i, more = 1, first = -1, last = -1, deflt = 0;
2962 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
2963 con_is_graphics(con->con, con->first, con->last))
2971 for (i = con->first; i <= con->last; i++) {
2972 if (con_driver_map[i] == csw) {
2977 } else if (first != -1)
2981 if (first == 0 && last == MAX_NR_CONSOLES -1)
2985 unbind_con_driver(csw, first, last, deflt);
2996 static inline int vt_bind(struct con_driver *con)
3000 static inline int vt_unbind(struct con_driver *con)
3004 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3006 static ssize_t store_bind(struct class_device *class_device,
3007 const char *buf, size_t count)
3009 struct con_driver *con = class_get_devdata(class_device);
3010 int bind = simple_strtoul(buf, NULL, 0);
3020 static ssize_t show_bind(struct class_device *class_device, char *buf)
3022 struct con_driver *con = class_get_devdata(class_device);
3023 int bind = con_is_bound(con->con);
3025 return snprintf(buf, PAGE_SIZE, "%i\n", bind);
3028 static ssize_t show_name(struct class_device *class_device, char *buf)
3030 struct con_driver *con = class_get_devdata(class_device);
3032 return snprintf(buf, PAGE_SIZE, "%s %s\n",
3033 (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)",
3038 static struct class_device_attribute class_device_attrs[] = {
3039 __ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind),
3040 __ATTR(name, S_IRUGO, show_name, NULL),
3043 static int vtconsole_init_class_device(struct con_driver *con)
3047 class_set_devdata(con->class_dev, con);
3048 for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++)
3049 class_device_create_file(con->class_dev,
3050 &class_device_attrs[i]);
3055 static void vtconsole_deinit_class_device(struct con_driver *con)
3059 for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++)
3060 class_device_remove_file(con->class_dev,
3061 &class_device_attrs[i]);
3065 * con_is_bound - checks if driver is bound to the console
3066 * @csw: console driver
3068 * RETURNS: zero if unbound, nonzero if bound
3070 * Drivers can call this and if zero, they should release
3071 * all resources allocated on con_startup()
3073 int con_is_bound(const struct consw *csw)
3077 for (i = 0; i < MAX_NR_CONSOLES; i++) {
3078 if (con_driver_map[i] == csw) {
3086 EXPORT_SYMBOL(con_is_bound);
3089 * register_con_driver - register console driver to console layer
3090 * @csw: console driver
3091 * @first: the first console to take over, minimum value is 0
3092 * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1
3094 * DESCRIPTION: This function registers a console driver which can later
3095 * bind to a range of consoles specified by @first and @last. It will
3096 * also initialize the console driver by calling con_startup().
3098 int register_con_driver(const struct consw *csw, int first, int last)
3100 struct module *owner = csw->owner;
3101 struct con_driver *con_driver;
3105 if (!try_module_get(owner))
3108 acquire_console_sem();
3110 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3111 con_driver = ®istered_con_driver[i];
3113 /* already registered */
3114 if (con_driver->con == csw)
3121 desc = csw->con_startup();
3128 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3129 con_driver = ®istered_con_driver[i];
3131 if (con_driver->con == NULL) {
3132 con_driver->con = csw;
3133 con_driver->desc = desc;
3134 con_driver->node = i;
3135 con_driver->flag = CON_DRIVER_FLAG_MODULE |
3136 CON_DRIVER_FLAG_INIT;
3137 con_driver->first = first;
3138 con_driver->last = last;
3147 con_driver->class_dev = class_device_create(vtconsole_class, NULL,
3148 MKDEV(0, con_driver->node),
3152 if (IS_ERR(con_driver->class_dev)) {
3153 printk(KERN_WARNING "Unable to create class_device for %s; "
3154 "errno = %ld\n", con_driver->desc,
3155 PTR_ERR(con_driver->class_dev));
3156 con_driver->class_dev = NULL;
3158 vtconsole_init_class_device(con_driver);
3161 release_console_sem();
3165 EXPORT_SYMBOL(register_con_driver);
3168 * unregister_con_driver - unregister console driver from console layer
3169 * @csw: console driver
3171 * DESCRIPTION: All drivers that registers to the console layer must
3172 * call this function upon exit, or if the console driver is in a state
3173 * where it won't be able to handle console services, such as the
3174 * framebuffer console without loaded framebuffer drivers.
3176 * The driver must unbind first prior to unregistration.
3178 int unregister_con_driver(const struct consw *csw)
3180 int i, retval = -ENODEV;
3182 acquire_console_sem();
3184 /* cannot unregister a bound driver */
3185 if (con_is_bound(csw))
3188 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3189 struct con_driver *con_driver = ®istered_con_driver[i];
3191 if (con_driver->con == csw &&
3192 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3193 vtconsole_deinit_class_device(con_driver);
3194 class_device_destroy(vtconsole_class,
3195 MKDEV(0, con_driver->node));
3196 con_driver->con = NULL;
3197 con_driver->desc = NULL;
3198 con_driver->class_dev = NULL;
3199 con_driver->node = 0;
3200 con_driver->flag = 0;
3201 con_driver->first = 0;
3202 con_driver->last = 0;
3208 release_console_sem();
3211 EXPORT_SYMBOL(unregister_con_driver);
3214 * If we support more console drivers, this function is used
3215 * when a driver wants to take over some existing consoles
3216 * and become default driver for newly opened ones.
3218 * take_over_console is basically a register followed by unbind
3220 int take_over_console(const struct consw *csw, int first, int last, int deflt)
3224 err = register_con_driver(csw, first, last);
3227 bind_con_driver(csw, first, last, deflt);
3233 * give_up_console is a wrapper to unregister_con_driver. It will only
3234 * work if driver is fully unbound.
3236 void give_up_console(const struct consw *csw)
3238 unregister_con_driver(csw);
3241 static int __init vtconsole_class_init(void)
3245 vtconsole_class = class_create(THIS_MODULE, "vtconsole");
3246 if (IS_ERR(vtconsole_class)) {
3247 printk(KERN_WARNING "Unable to create vt console class; "
3248 "errno = %ld\n", PTR_ERR(vtconsole_class));
3249 vtconsole_class = NULL;
3252 /* Add system drivers to sysfs */
3253 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3254 struct con_driver *con = ®istered_con_driver[i];
3256 if (con->con && !con->class_dev) {
3258 class_device_create(vtconsole_class, NULL,
3259 MKDEV(0, con->node), NULL,
3260 "vtcon%i", con->node);
3262 if (IS_ERR(con->class_dev)) {
3263 printk(KERN_WARNING "Unable to create "
3264 "class_device for %s; errno = %ld\n",
3265 con->desc, PTR_ERR(con->class_dev));
3266 con->class_dev = NULL;
3268 vtconsole_init_class_device(con);
3275 postcore_initcall(vtconsole_class_init);
3283 static void set_vesa_blanking(char __user *p)
3286 get_user(mode, p + 1);
3287 vesa_blank_mode = (mode < 4) ? mode : 0;
3290 void do_blank_screen(int entering_gfx)
3292 struct vc_data *vc = vc_cons[fg_console].d;
3295 WARN_CONSOLE_UNLOCKED();
3297 if (console_blanked) {
3298 if (blank_state == blank_vesa_wait) {
3299 blank_state = blank_off;
3300 vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0);
3304 if (blank_state != blank_normal_wait)
3306 blank_state = blank_off;
3308 /* entering graphics mode? */
3312 vc->vc_sw->con_blank(vc, -1, 1);
3313 console_blanked = fg_console + 1;
3318 /* don't blank graphics */
3319 if (vc->vc_mode != KD_TEXT) {
3320 console_blanked = fg_console + 1;
3325 del_timer_sync(&console_timer);
3326 blank_timer_expired = 0;
3329 /* In case we need to reset origin, blanking hook returns 1 */
3330 i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0);
3331 console_blanked = fg_console + 1;
3335 if (console_blank_hook && console_blank_hook(1))
3338 if (vesa_off_interval && vesa_blank_mode) {
3339 blank_state = blank_vesa_wait;
3340 mod_timer(&console_timer, jiffies + vesa_off_interval);
3343 EXPORT_SYMBOL(do_blank_screen);
3346 * Called by timer as well as from vt_console_driver
3348 void do_unblank_screen(int leaving_gfx)
3352 /* This should now always be called from a "sane" (read: can schedule)
3353 * context for the sake of the low level drivers, except in the special
3354 * case of oops_in_progress
3356 if (!oops_in_progress)
3359 WARN_CONSOLE_UNLOCKED();
3362 if (!console_blanked)
3364 if (!vc_cons_allocated(fg_console)) {
3366 printk("unblank_screen: tty %d not allocated ??\n", fg_console+1);
3369 vc = vc_cons[fg_console].d;
3370 if (vc->vc_mode != KD_TEXT)
3371 return; /* but leave console_blanked != 0 */
3373 if (blankinterval) {
3374 mod_timer(&console_timer, jiffies + blankinterval);
3375 blank_state = blank_normal_wait;
3378 console_blanked = 0;
3379 if (vc->vc_sw->con_blank(vc, 0, leaving_gfx))
3380 /* Low-level driver cannot restore -> do it ourselves */
3382 if (console_blank_hook)
3383 console_blank_hook(0);
3387 EXPORT_SYMBOL(do_unblank_screen);
3390 * This is called by the outside world to cause a forced unblank, mostly for
3391 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
3392 * call it with 1 as an argument and so force a mode restore... that may kill
3393 * X or at least garbage the screen but would also make the Oops visible...
3395 void unblank_screen(void)
3397 do_unblank_screen(0);
3401 * We defer the timer blanking to work queue so it can take the console mutex
3402 * (console operations can still happen at irq time, but only from printk which
3403 * has the console mutex. Not perfect yet, but better than no locking
3405 static void blank_screen_t(unsigned long dummy)
3407 if (unlikely(!keventd_up())) {
3408 mod_timer(&console_timer, jiffies + blankinterval);
3411 blank_timer_expired = 1;
3412 schedule_work(&console_work);
3415 void poke_blanked_console(void)
3417 WARN_CONSOLE_UNLOCKED();
3419 /* Add this so we quickly catch whoever might call us in a non
3420 * safe context. Nowadays, unblank_screen() isn't to be called in
3421 * atomic contexts and is allowed to schedule (with the special case
3422 * of oops_in_progress, but that isn't of any concern for this
3427 /* This isn't perfectly race free, but a race here would be mostly harmless,
3428 * at worse, we'll do a spurrious blank and it's unlikely
3430 del_timer(&console_timer);
3431 blank_timer_expired = 0;
3433 if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS)
3435 if (console_blanked)
3437 else if (blankinterval) {
3438 mod_timer(&console_timer, jiffies + blankinterval);
3439 blank_state = blank_normal_wait;
3447 static void set_palette(struct vc_data *vc)
3449 WARN_CONSOLE_UNLOCKED();
3451 if (vc->vc_mode != KD_GRAPHICS)
3452 vc->vc_sw->con_set_palette(vc, color_table);
3455 static int set_get_cmap(unsigned char __user *arg, int set)
3459 WARN_CONSOLE_UNLOCKED();
3461 for (i = 0; i < 16; i++)
3463 get_user(default_red[i], arg++);
3464 get_user(default_grn[i], arg++);
3465 get_user(default_blu[i], arg++);
3467 put_user(default_red[i], arg++);
3468 put_user(default_grn[i], arg++);
3469 put_user(default_blu[i], arg++);
3472 for (i = 0; i < MAX_NR_CONSOLES; i++)
3473 if (vc_cons_allocated(i)) {
3474 for (j = k = 0; j < 16; j++) {
3475 vc_cons[i].d->vc_palette[k++] = default_red[j];
3476 vc_cons[i].d->vc_palette[k++] = default_grn[j];
3477 vc_cons[i].d->vc_palette[k++] = default_blu[j];
3479 set_palette(vc_cons[i].d);
3486 * Load palette into the DAC registers. arg points to a colour
3487 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
3490 int con_set_cmap(unsigned char __user *arg)
3494 acquire_console_sem();
3495 rc = set_get_cmap (arg,1);
3496 release_console_sem();
3501 int con_get_cmap(unsigned char __user *arg)
3505 acquire_console_sem();
3506 rc = set_get_cmap (arg,0);
3507 release_console_sem();
3512 void reset_palette(struct vc_data *vc)
3515 for (j=k=0; j<16; j++) {
3516 vc->vc_palette[k++] = default_red[j];
3517 vc->vc_palette[k++] = default_grn[j];
3518 vc->vc_palette[k++] = default_blu[j];
3526 * Currently we only support fonts up to 32 pixels wide, at a maximum height
3527 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
3528 * depending on width) reserved for each character which is kinda wasty, but
3529 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
3530 * is upto the actual low-level console-driver convert data into its favorite
3531 * format (maybe we should add a `fontoffset' field to the `display'
3532 * structure so we won't have to convert the fontdata all the time.
3536 #define max_font_size 65536
3538 static int con_font_get(struct vc_data *vc, struct console_font_op *op)
3540 struct console_font font;
3544 if (vc->vc_mode != KD_TEXT)
3548 font.data = kmalloc(max_font_size, GFP_KERNEL);
3554 acquire_console_sem();
3555 if (vc->vc_sw->con_font_get)
3556 rc = vc->vc_sw->con_font_get(vc, &font);
3559 release_console_sem();
3564 c = (font.width+7)/8 * 32 * font.charcount;
3566 if (op->data && font.charcount > op->charcount)
3568 if (!(op->flags & KD_FONT_FLAG_OLD)) {
3569 if (font.width > op->width || font.height > op->height)
3572 if (font.width != 8)
3574 else if ((op->height && font.height > op->height) ||
3581 op->height = font.height;
3582 op->width = font.width;
3583 op->charcount = font.charcount;
3585 if (op->data && copy_to_user(op->data, font.data, c))
3593 static int con_font_set(struct vc_data *vc, struct console_font_op *op)
3595 struct console_font font;
3599 if (vc->vc_mode != KD_TEXT)
3603 if (op->charcount > 512)
3605 if (!op->height) { /* Need to guess font height [compat] */
3607 u8 __user *charmap = op->data;
3610 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
3611 so that we can get rid of this soon */
3612 if (!(op->flags & KD_FONT_FLAG_OLD))
3614 for (h = 32; h > 0; h--)
3615 for (i = 0; i < op->charcount; i++) {
3616 if (get_user(tmp, &charmap[32*i+h-1]))
3625 if (op->width <= 0 || op->width > 32 || op->height > 32)
3627 size = (op->width+7)/8 * 32 * op->charcount;
3628 if (size > max_font_size)
3630 font.charcount = op->charcount;
3631 font.height = op->height;
3632 font.width = op->width;
3633 font.data = kmalloc(size, GFP_KERNEL);
3636 if (copy_from_user(font.data, op->data, size)) {
3640 acquire_console_sem();
3641 if (vc->vc_sw->con_font_set)
3642 rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
3645 release_console_sem();
3650 static int con_font_default(struct vc_data *vc, struct console_font_op *op)
3652 struct console_font font = {.width = op->width, .height = op->height};
3653 char name[MAX_FONT_NAME];
3657 if (vc->vc_mode != KD_TEXT)
3662 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0)
3665 name[MAX_FONT_NAME - 1] = 0;
3667 acquire_console_sem();
3668 if (vc->vc_sw->con_font_default)
3669 rc = vc->vc_sw->con_font_default(vc, &font, s);
3672 release_console_sem();
3674 op->width = font.width;
3675 op->height = font.height;
3680 static int con_font_copy(struct vc_data *vc, struct console_font_op *op)
3682 int con = op->height;
3685 if (vc->vc_mode != KD_TEXT)
3688 acquire_console_sem();
3689 if (!vc->vc_sw->con_font_copy)
3691 else if (con < 0 || !vc_cons_allocated(con))
3693 else if (con == vc->vc_num) /* nothing to do */
3696 rc = vc->vc_sw->con_font_copy(vc, con);
3697 release_console_sem();
3701 int con_font_op(struct vc_data *vc, struct console_font_op *op)
3704 case KD_FONT_OP_SET:
3705 return con_font_set(vc, op);
3706 case KD_FONT_OP_GET:
3707 return con_font_get(vc, op);
3708 case KD_FONT_OP_SET_DEFAULT:
3709 return con_font_default(vc, op);
3710 case KD_FONT_OP_COPY:
3711 return con_font_copy(vc, op);
3717 * Interface exported to selection and vcs.
3720 /* used by selection */
3721 u16 screen_glyph(struct vc_data *vc, int offset)
3723 u16 w = scr_readw(screenpos(vc, offset, 1));
3726 if (w & vc->vc_hi_font_mask)
3731 /* used by vcs - note the word offset */
3732 unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed)
3734 return screenpos(vc, 2 * w_offset, viewed);
3737 void getconsxy(struct vc_data *vc, unsigned char *p)
3743 void putconsxy(struct vc_data *vc, unsigned char *p)
3746 gotoxy(vc, p[0], p[1]);
3750 u16 vcs_scr_readw(struct vc_data *vc, const u16 *org)
3752 if ((unsigned long)org == vc->vc_pos && softcursor_original != -1)
3753 return softcursor_original;
3754 return scr_readw(org);
3757 void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org)
3759 scr_writew(val, org);
3760 if ((unsigned long)org == vc->vc_pos) {
3761 softcursor_original = -1;
3767 * Visible symbols for modules
3770 EXPORT_SYMBOL(color_table);
3771 EXPORT_SYMBOL(default_red);
3772 EXPORT_SYMBOL(default_grn);
3773 EXPORT_SYMBOL(default_blu);
3774 EXPORT_SYMBOL(update_region);
3775 EXPORT_SYMBOL(redraw_screen);
3776 EXPORT_SYMBOL(vc_resize);
3777 EXPORT_SYMBOL(vc_lock_resize);
3778 EXPORT_SYMBOL(fg_console);
3779 EXPORT_SYMBOL(console_blank_hook);
3780 EXPORT_SYMBOL(console_blanked);
3781 EXPORT_SYMBOL(vc_cons);
3782 #ifndef VT_SINGLE_DRIVER
3783 EXPORT_SYMBOL(take_over_console);
3784 EXPORT_SYMBOL(give_up_console);