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
67 * Fixed UTF-8 mode so alternate charset modes always work according
68 * to control sequences interpreted in do_con_trol function
69 * preserving backward VT100 semigraphics compatibility,
70 * malformed UTF sequences represented as sequences of replacement glyphs,
71 * original codes or '?' as a last resort if replacement glyph is undefined
72 * by Adam Tla/lka <atlka@pg.gda.pl>, Aug 2006
75 #include <linux/module.h>
76 #include <linux/types.h>
77 #include <linux/sched.h>
78 #include <linux/tty.h>
79 #include <linux/tty_flip.h>
80 #include <linux/kernel.h>
81 #include <linux/string.h>
82 #include <linux/errno.h>
84 #include <linux/slab.h>
85 #include <linux/major.h>
87 #include <linux/console.h>
88 #include <linux/init.h>
89 #include <linux/vt_kern.h>
90 #include <linux/selection.h>
91 #include <linux/tiocl.h>
92 #include <linux/kbd_kern.h>
93 #include <linux/consolemap.h>
94 #include <linux/timer.h>
95 #include <linux/interrupt.h>
96 #include <linux/workqueue.h>
97 #include <linux/bootmem.h>
99 #include <linux/font.h>
100 #include <linux/bitops.h>
103 #include <asm/system.h>
104 #include <asm/uaccess.h>
106 #define MAX_NR_CON_DRIVER 16
108 #define CON_DRIVER_FLAG_MODULE 1
109 #define CON_DRIVER_FLAG_INIT 2
110 #define CON_DRIVER_FLAG_ATTR 4
113 const struct consw *con;
122 static struct con_driver registered_con_driver[MAX_NR_CON_DRIVER];
123 const struct consw *conswitchp;
125 /* A bitmap for codes <32. A bit of 1 indicates that the code
126 * corresponding to that bit number invokes some special action
127 * (such as cursor movement) and should not be displayed as a
128 * glyph unless the disp_ctrl mode is explicitly enabled.
130 #define CTRL_ACTION 0x0d00ff81
131 #define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */
134 * Here is the default bell parameters: 750HZ, 1/8th of a second
136 #define DEFAULT_BELL_PITCH 750
137 #define DEFAULT_BELL_DURATION (HZ/8)
139 struct vc vc_cons [MAX_NR_CONSOLES];
141 #ifndef VT_SINGLE_DRIVER
142 static const struct consw *con_driver_map[MAX_NR_CONSOLES];
145 static int con_open(struct tty_struct *, struct file *);
146 static void vc_init(struct vc_data *vc, unsigned int rows,
147 unsigned int cols, int do_clear);
148 static void gotoxy(struct vc_data *vc, int new_x, int new_y);
149 static void save_cur(struct vc_data *vc);
150 static void reset_terminal(struct vc_data *vc, int do_clear);
151 static void con_flush_chars(struct tty_struct *tty);
152 static int set_vesa_blanking(char __user *p);
153 static void set_cursor(struct vc_data *vc);
154 static void hide_cursor(struct vc_data *vc);
155 static void console_callback(struct work_struct *ignored);
156 static void blank_screen_t(unsigned long dummy);
157 static void set_palette(struct vc_data *vc);
159 static int printable; /* Is console ready for printing? */
162 * ignore_poke: don't unblank the screen when things are typed. This is
163 * mainly for the privacy of braille terminal users.
165 static int ignore_poke;
167 int do_poke_blanked_console;
170 static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
171 static int blankinterval = 10*60*HZ;
172 static int vesa_off_interval;
174 static DECLARE_WORK(console_work, console_callback);
177 * fg_console is the current virtual console,
178 * last_console is the last used one,
179 * want_console is the console we want to switch to,
180 * kmsg_redirect is the console for kernel messages,
184 int want_console = -1;
188 * For each existing display, we have a pointer to console currently visible
189 * on that display, allowing consoles other than fg_console to be refreshed
190 * appropriately. Unless the low-level driver supplies its own display_fg
191 * variable, we use this one for the "master display".
193 static struct vc_data *master_display_fg;
196 * Unfortunately, we need to delay tty echo when we're currently writing to the
197 * console since the code is (and always was) not re-entrant, so we schedule
198 * all flip requests to process context with schedule-task() and run it from
199 * console_callback().
203 * For the same reason, we defer scrollback to the console callback.
205 static int scrollback_delta;
208 * Hook so that the power management routines can (un)blank
209 * the console on our behalf.
211 int (*console_blank_hook)(int);
213 static DEFINE_TIMER(console_timer, blank_screen_t, 0, 0);
214 static int blank_state;
215 static int blank_timer_expired;
223 * Low-Level Functions
226 #define IS_FG(vc) ((vc)->vc_num == fg_console)
228 #ifdef VT_BUF_VRAM_ONLY
229 #define DO_UPDATE(vc) 0
231 #define DO_UPDATE(vc) CON_IS_VISIBLE(vc)
234 static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed)
239 p = (unsigned short *)(vc->vc_origin + offset);
240 else if (!vc->vc_sw->con_screen_pos)
241 p = (unsigned short *)(vc->vc_visible_origin + offset);
243 p = vc->vc_sw->con_screen_pos(vc, offset);
247 static inline void scrolldelta(int lines)
249 scrollback_delta += lines;
250 schedule_console_callback();
253 void schedule_console_callback(void)
255 schedule_work(&console_work);
258 static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
260 unsigned short *d, *s;
264 if (b > vc->vc_rows || t >= b || nr < 1)
266 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr))
268 d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
269 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr));
270 scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row);
271 scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_video_erase_char,
272 vc->vc_size_row * nr);
275 static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
282 if (b > vc->vc_rows || t >= b || nr < 1)
284 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr))
286 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
287 step = vc->vc_cols * nr;
288 scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row);
289 scr_memsetw(s, vc->vc_video_erase_char, 2 * step);
292 static void do_update_region(struct vc_data *vc, unsigned long start, int count)
294 #ifndef VT_BUF_VRAM_ONLY
295 unsigned int xx, yy, offset;
299 if (!vc->vc_sw->con_getxy) {
300 offset = (start - vc->vc_origin) / 2;
301 xx = offset % vc->vc_cols;
302 yy = offset / vc->vc_cols;
305 start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy);
309 u16 attrib = scr_readw(p) & 0xff00;
312 while (xx < vc->vc_cols && count) {
313 if (attrib != (scr_readw(p) & 0xff00)) {
315 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
318 attrib = scr_readw(p) & 0xff00;
325 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
330 if (vc->vc_sw->con_getxy) {
332 start = vc->vc_sw->con_getxy(vc, start, NULL, NULL);
338 void update_region(struct vc_data *vc, unsigned long start, int count)
340 WARN_CONSOLE_UNLOCKED();
344 do_update_region(vc, start, count);
349 /* Structure of attributes is hardware-dependent */
351 static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink,
352 u8 _underline, u8 _reverse, u8 _italic)
354 if (vc->vc_sw->con_build_attr)
355 return vc->vc_sw->con_build_attr(vc, _color, _intensity,
356 _blink, _underline, _reverse, _italic);
358 #ifndef VT_BUF_VRAM_ONLY
360 * ++roman: I completely changed the attribute format for monochrome
361 * mode (!can_do_color). The formerly used MDA (monochrome display
362 * adapter) format didn't allow the combination of certain effects.
363 * Now the attribute is just a bit vector:
364 * Bit 0..1: intensity (0..2)
371 if (!vc->vc_can_do_color)
374 (_underline ? 4 : 0) |
378 a = (a & 0xF0) | vc->vc_itcolor;
380 a = (a & 0xf0) | vc->vc_ulcolor;
381 else if (_intensity == 0)
382 a = (a & 0xf0) | vc->vc_ulcolor;
384 a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77);
389 if (vc->vc_hi_font_mask == 0x100)
398 static void update_attr(struct vc_data *vc)
400 vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity,
401 vc->vc_blink, vc->vc_underline,
402 vc->vc_reverse ^ vc->vc_decscnm, vc->vc_italic);
403 vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm, 0) << 8) | ' ';
406 /* Note: inverting the screen twice should revert to the original state */
407 void invert_screen(struct vc_data *vc, int offset, int count, int viewed)
411 WARN_CONSOLE_UNLOCKED();
414 p = screenpos(vc, offset, viewed);
415 if (vc->vc_sw->con_invert_region)
416 vc->vc_sw->con_invert_region(vc, p, count);
417 #ifndef VT_BUF_VRAM_ONLY
423 if (!vc->vc_can_do_color) {
430 } else if (vc->vc_hi_font_mask == 0x100) {
433 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4);
440 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4);
448 do_update_region(vc, (unsigned long) p, count);
451 /* used by selection: complement pointer position */
452 void complement_pos(struct vc_data *vc, int offset)
454 static int old_offset = -1;
455 static unsigned short old;
456 static unsigned short oldx, oldy;
458 WARN_CONSOLE_UNLOCKED();
460 if (old_offset != -1 && old_offset >= 0 &&
461 old_offset < vc->vc_screenbuf_size) {
462 scr_writew(old, screenpos(vc, old_offset, 1));
464 vc->vc_sw->con_putc(vc, old, oldy, oldx);
469 if (offset != -1 && offset >= 0 &&
470 offset < vc->vc_screenbuf_size) {
473 p = screenpos(vc, offset, 1);
475 new = old ^ vc->vc_complement_mask;
478 oldx = (offset >> 1) % vc->vc_cols;
479 oldy = (offset >> 1) / vc->vc_cols;
480 vc->vc_sw->con_putc(vc, new, oldy, oldx);
486 static void insert_char(struct vc_data *vc, unsigned int nr)
488 unsigned short *p, *q = (unsigned short *)vc->vc_pos;
490 p = q + vc->vc_cols - nr - vc->vc_x;
492 scr_writew(scr_readw(p), p + nr);
493 scr_memsetw(q, 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, vc->vc_y, vc->vc_x + nr, 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, vc->vc_x + nr);
502 vc->vc_attr = oldattr;
506 static void delete_char(struct vc_data *vc, unsigned int nr)
508 unsigned int i = vc->vc_x;
509 unsigned short *p = (unsigned short *)vc->vc_pos;
511 while (++i <= vc->vc_cols - nr) {
512 scr_writew(scr_readw(p+nr), p);
515 scr_memsetw(p, vc->vc_video_erase_char, nr * 2);
516 vc->vc_need_wrap = 0;
518 unsigned short oldattr = vc->vc_attr;
519 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x + nr, vc->vc_y, vc->vc_x, 1,
520 vc->vc_cols - vc->vc_x - nr);
521 vc->vc_attr = vc->vc_video_erase_char >> 8;
523 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y,
524 vc->vc_cols - 1 - nr);
525 vc->vc_attr = oldattr;
529 static int softcursor_original;
531 static void add_softcursor(struct vc_data *vc)
533 int i = scr_readw((u16 *) vc->vc_pos);
534 u32 type = vc->vc_cursor_type;
536 if (! (type & 0x10)) return;
537 if (softcursor_original != -1) return;
538 softcursor_original = i;
539 i |= ((type >> 8) & 0xff00 );
540 i ^= ((type) & 0xff00 );
541 if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000;
542 if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700;
543 scr_writew(i, (u16 *) vc->vc_pos);
545 vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x);
548 static void hide_softcursor(struct vc_data *vc)
550 if (softcursor_original != -1) {
551 scr_writew(softcursor_original, (u16 *)vc->vc_pos);
553 vc->vc_sw->con_putc(vc, softcursor_original,
555 softcursor_original = -1;
559 static void hide_cursor(struct vc_data *vc)
563 vc->vc_sw->con_cursor(vc, CM_ERASE);
567 static void set_cursor(struct vc_data *vc)
569 if (!IS_FG(vc) || console_blanked ||
570 vc->vc_mode == KD_GRAPHICS)
576 if ((vc->vc_cursor_type & 0x0f) != 1)
577 vc->vc_sw->con_cursor(vc, CM_DRAW);
582 static void set_origin(struct vc_data *vc)
584 WARN_CONSOLE_UNLOCKED();
586 if (!CON_IS_VISIBLE(vc) ||
587 !vc->vc_sw->con_set_origin ||
588 !vc->vc_sw->con_set_origin(vc))
589 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
590 vc->vc_visible_origin = vc->vc_origin;
591 vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size;
592 vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x;
595 static inline void save_screen(struct vc_data *vc)
597 WARN_CONSOLE_UNLOCKED();
599 if (vc->vc_sw->con_save_screen)
600 vc->vc_sw->con_save_screen(vc);
604 * Redrawing of screen
607 static void clear_buffer_attributes(struct vc_data *vc)
609 unsigned short *p = (unsigned short *)vc->vc_origin;
610 int count = vc->vc_screenbuf_size / 2;
611 int mask = vc->vc_hi_font_mask | 0xff;
613 for (; count > 0; count--, p++) {
614 scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p);
618 void redraw_screen(struct vc_data *vc, int is_switch)
622 WARN_CONSOLE_UNLOCKED();
626 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
631 struct vc_data *old_vc = vc_cons[fg_console].d;
634 if (!CON_IS_VISIBLE(vc))
636 *vc->vc_display_fg = vc;
637 fg_console = vc->vc_num;
639 if (!CON_IS_VISIBLE(old_vc)) {
650 int old_was_color = vc->vc_can_do_color;
653 update = vc->vc_sw->con_switch(vc);
656 * If console changed from mono<->color, the best we can do
657 * is to clear the buffer attributes. As it currently stands,
658 * rebuilding new attributes from the old buffer is not doable
659 * without overly complex code.
661 if (old_was_color != vc->vc_can_do_color) {
663 clear_buffer_attributes(vc);
665 if (update && vc->vc_mode != KD_GRAPHICS)
666 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
671 compute_shiftstate();
676 * Allocation, freeing and resizing of VTs.
679 int vc_cons_allocated(unsigned int i)
681 return (i < MAX_NR_CONSOLES && vc_cons[i].d);
684 static void visual_init(struct vc_data *vc, int num, int init)
686 /* ++Geert: vc->vc_sw->con_init determines console size */
688 module_put(vc->vc_sw->owner);
689 vc->vc_sw = conswitchp;
690 #ifndef VT_SINGLE_DRIVER
691 if (con_driver_map[num])
692 vc->vc_sw = con_driver_map[num];
694 __module_get(vc->vc_sw->owner);
696 vc->vc_display_fg = &master_display_fg;
697 vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir;
698 vc->vc_uni_pagedir = 0;
699 vc->vc_hi_font_mask = 0;
700 vc->vc_complement_mask = 0;
701 vc->vc_can_do_color = 0;
702 vc->vc_sw->con_init(vc, init);
703 if (!vc->vc_complement_mask)
704 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
705 vc->vc_s_complement_mask = vc->vc_complement_mask;
706 vc->vc_size_row = vc->vc_cols << 1;
707 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
710 int vc_allocate(unsigned int currcons) /* return 0 on success */
712 WARN_CONSOLE_UNLOCKED();
714 if (currcons >= MAX_NR_CONSOLES)
716 if (!vc_cons[currcons].d) {
719 /* prevent users from taking too much memory */
720 if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE))
723 /* due to the granularity of kmalloc, we waste some memory here */
724 /* the alloc is done in two steps, to optimize the common situation
725 of a 25x80 console (structsize=216, screenbuf_size=4000) */
726 /* although the numbers above are not valid since long ago, the
727 point is still up-to-date and the comment still has its value
728 even if only as a historical artifact. --mj, July 1998 */
729 vc = kmalloc(sizeof(struct vc_data), GFP_KERNEL);
732 memset(vc, 0, sizeof(*vc));
733 vc_cons[currcons].d = vc;
734 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
735 visual_init(vc, currcons, 1);
736 if (!*vc->vc_uni_pagedir_loc)
737 con_set_default_unimap(vc);
738 if (!vc->vc_kmalloced)
739 vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL);
740 if (!vc->vc_screenbuf) {
742 vc_cons[currcons].d = NULL;
745 vc->vc_kmalloced = 1;
746 vc_init(vc, vc->vc_rows, vc->vc_cols, 1);
751 static inline int resize_screen(struct vc_data *vc, int width, int height)
753 /* Resizes the resolution of the display adapater */
756 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize)
757 err = vc->vc_sw->con_resize(vc, width, height);
762 * Change # of rows and columns (0 means unchanged/the size of fg_console)
763 * [this is to be used together with some user program
764 * like resize that changes the hardware videomode]
766 #define VC_RESIZE_MAXCOL (32767)
767 #define VC_RESIZE_MAXROW (32767)
768 int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int lines)
770 unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0;
771 unsigned int old_cols, old_rows, old_row_size, old_screen_size;
772 unsigned int new_cols, new_rows, new_row_size, new_screen_size;
774 unsigned short *newscreen;
776 WARN_CONSOLE_UNLOCKED();
781 if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW)
784 new_cols = (cols ? cols : vc->vc_cols);
785 new_rows = (lines ? lines : vc->vc_rows);
786 new_row_size = new_cols << 1;
787 new_screen_size = new_row_size * new_rows;
789 if (new_cols == vc->vc_cols && new_rows == vc->vc_rows)
792 newscreen = kmalloc(new_screen_size, GFP_USER);
796 old_rows = vc->vc_rows;
797 old_cols = vc->vc_cols;
798 old_row_size = vc->vc_size_row;
799 old_screen_size = vc->vc_screenbuf_size;
801 err = resize_screen(vc, new_cols, new_rows);
807 vc->vc_rows = new_rows;
808 vc->vc_cols = new_cols;
809 vc->vc_size_row = new_row_size;
810 vc->vc_screenbuf_size = new_screen_size;
812 rlth = min(old_row_size, new_row_size);
813 rrem = new_row_size - rlth;
814 old_origin = vc->vc_origin;
815 new_origin = (long) newscreen;
816 new_scr_end = new_origin + new_screen_size;
818 if (vc->vc_y > new_rows) {
819 if (old_rows - vc->vc_y < new_rows) {
821 * Cursor near the bottom, copy contents from the
824 old_origin += (old_rows - new_rows) * old_row_size;
825 end = vc->vc_scr_end;
828 * Cursor is in no man's land, copy 1/2 screenful
829 * from the top and bottom of cursor position
831 old_origin += (vc->vc_y - new_rows/2) * old_row_size;
832 end = old_origin + (old_row_size * new_rows);
836 * Cursor near the top, copy contents from the top of buffer
838 end = (old_rows > new_rows) ? old_origin +
839 (old_row_size * new_rows) :
844 while (old_origin < end) {
845 scr_memcpyw((unsigned short *) new_origin,
846 (unsigned short *) old_origin, rlth);
848 scr_memsetw((void *)(new_origin + rlth),
849 vc->vc_video_erase_char, rrem);
850 old_origin += old_row_size;
851 new_origin += new_row_size;
853 if (new_scr_end > new_origin)
854 scr_memsetw((void *)new_origin, vc->vc_video_erase_char,
855 new_scr_end - new_origin);
856 if (vc->vc_kmalloced)
857 kfree(vc->vc_screenbuf);
858 vc->vc_screenbuf = newscreen;
859 vc->vc_kmalloced = 1;
860 vc->vc_screenbuf_size = new_screen_size;
863 /* do part of a reset_terminal() */
865 vc->vc_bottom = vc->vc_rows;
866 gotoxy(vc, vc->vc_x, vc->vc_y);
870 struct winsize ws, *cws = &vc->vc_tty->winsize;
872 memset(&ws, 0, sizeof(ws));
873 ws.ws_row = vc->vc_rows;
874 ws.ws_col = vc->vc_cols;
875 ws.ws_ypixel = vc->vc_scan_lines;
876 if ((ws.ws_row != cws->ws_row || ws.ws_col != cws->ws_col) &&
878 kill_pgrp(vc->vc_tty->pgrp, SIGWINCH, 1);
882 if (CON_IS_VISIBLE(vc))
887 int vc_lock_resize(struct vc_data *vc, unsigned int cols, unsigned int lines)
891 acquire_console_sem();
892 rc = vc_resize(vc, cols, lines);
893 release_console_sem();
897 void vc_deallocate(unsigned int currcons)
899 WARN_CONSOLE_UNLOCKED();
901 if (vc_cons_allocated(currcons)) {
902 struct vc_data *vc = vc_cons[currcons].d;
903 vc->vc_sw->con_deinit(vc);
905 module_put(vc->vc_sw->owner);
906 if (vc->vc_kmalloced)
907 kfree(vc->vc_screenbuf);
908 if (currcons >= MIN_NR_CONSOLES)
910 vc_cons[currcons].d = NULL;
918 #define set_kbd(vc, x) set_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
919 #define clr_kbd(vc, x) clr_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
920 #define is_kbd(vc, x) vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
922 #define decarm VC_REPEAT
923 #define decckm VC_CKMODE
924 #define kbdapplic VC_APPLIC
928 * this is what the terminal answers to a ESC-Z or csi0c query.
930 #define VT100ID "\033[?1;2c"
931 #define VT102ID "\033[?6c"
933 unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7,
934 8,12,10,14, 9,13,11,15 };
936 /* the default colour table, for VGA+ colour systems */
937 int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
938 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
939 int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
940 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
941 int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
942 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
944 module_param_array(default_red, int, NULL, S_IRUGO | S_IWUSR);
945 module_param_array(default_grn, int, NULL, S_IRUGO | S_IWUSR);
946 module_param_array(default_blu, int, NULL, S_IRUGO | S_IWUSR);
949 * gotoxy() must verify all boundaries, because the arguments
950 * might also be negative. If the given position is out of
951 * bounds, the cursor is placed at the nearest margin.
953 static void gotoxy(struct vc_data *vc, int new_x, int new_y)
960 if (new_x >= vc->vc_cols)
961 vc->vc_x = vc->vc_cols - 1;
968 max_y = vc->vc_bottom;
975 else if (new_y >= max_y)
976 vc->vc_y = max_y - 1;
979 vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1);
980 vc->vc_need_wrap = 0;
983 /* for absolute user moves, when decom is set */
984 static void gotoxay(struct vc_data *vc, int new_x, int new_y)
986 gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y);
989 void scrollback(struct vc_data *vc, int lines)
992 lines = vc->vc_rows / 2;
996 void scrollfront(struct vc_data *vc, int lines)
999 lines = vc->vc_rows / 2;
1003 static void lf(struct vc_data *vc)
1005 /* don't scroll if above bottom of scrolling region, or
1006 * if below scrolling region
1008 if (vc->vc_y + 1 == vc->vc_bottom)
1009 scrup(vc, vc->vc_top, vc->vc_bottom, 1);
1010 else if (vc->vc_y < vc->vc_rows - 1) {
1012 vc->vc_pos += vc->vc_size_row;
1014 vc->vc_need_wrap = 0;
1017 static void ri(struct vc_data *vc)
1019 /* don't scroll if below top of scrolling region, or
1020 * if above scrolling region
1022 if (vc->vc_y == vc->vc_top)
1023 scrdown(vc, vc->vc_top, vc->vc_bottom, 1);
1024 else if (vc->vc_y > 0) {
1026 vc->vc_pos -= vc->vc_size_row;
1028 vc->vc_need_wrap = 0;
1031 static inline void cr(struct vc_data *vc)
1033 vc->vc_pos -= vc->vc_x << 1;
1034 vc->vc_need_wrap = vc->vc_x = 0;
1037 static inline void bs(struct vc_data *vc)
1042 vc->vc_need_wrap = 0;
1046 static inline void del(struct vc_data *vc)
1051 static void csi_J(struct vc_data *vc, int vpar)
1054 unsigned short * start;
1057 case 0: /* erase from cursor to end of display */
1058 count = (vc->vc_scr_end - vc->vc_pos) >> 1;
1059 start = (unsigned short *)vc->vc_pos;
1060 if (DO_UPDATE(vc)) {
1061 /* do in two stages */
1062 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1063 vc->vc_cols - vc->vc_x);
1064 vc->vc_sw->con_clear(vc, vc->vc_y + 1, 0,
1065 vc->vc_rows - vc->vc_y - 1,
1069 case 1: /* erase from start to cursor */
1070 count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1;
1071 start = (unsigned short *)vc->vc_origin;
1072 if (DO_UPDATE(vc)) {
1073 /* do in two stages */
1074 vc->vc_sw->con_clear(vc, 0, 0, vc->vc_y,
1076 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1080 case 2: /* erase whole display */
1081 count = vc->vc_cols * vc->vc_rows;
1082 start = (unsigned short *)vc->vc_origin;
1084 vc->vc_sw->con_clear(vc, 0, 0,
1091 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1092 vc->vc_need_wrap = 0;
1095 static void csi_K(struct vc_data *vc, int vpar)
1098 unsigned short * start;
1101 case 0: /* erase from cursor to end of line */
1102 count = vc->vc_cols - vc->vc_x;
1103 start = (unsigned short *)vc->vc_pos;
1105 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1106 vc->vc_cols - vc->vc_x);
1108 case 1: /* erase from start of line to cursor */
1109 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1110 count = vc->vc_x + 1;
1112 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1115 case 2: /* erase whole line */
1116 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1117 count = vc->vc_cols;
1119 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1125 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1126 vc->vc_need_wrap = 0;
1129 static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */
1135 count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar;
1137 scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count);
1139 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count);
1140 vc->vc_need_wrap = 0;
1143 static void default_attr(struct vc_data *vc)
1145 vc->vc_intensity = 1;
1147 vc->vc_underline = 0;
1150 vc->vc_color = vc->vc_def_color;
1153 /* console_sem is held */
1154 static void csi_m(struct vc_data *vc)
1158 for (i = 0; i <= vc->vc_npar; i++)
1159 switch (vc->vc_par[i]) {
1160 case 0: /* all attributes off */
1164 vc->vc_intensity = 2;
1167 vc->vc_intensity = 0;
1173 vc->vc_underline = 1;
1181 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1182 * Select primary font, don't display
1183 * control chars if defined, don't set
1186 vc->vc_translate = set_translate(vc->vc_charset == 0
1188 : vc->vc_G1_charset, vc);
1189 vc->vc_disp_ctrl = 0;
1190 vc->vc_toggle_meta = 0;
1192 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1193 * Select first alternate font, lets
1194 * chars < 32 be displayed as ROM chars.
1196 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1197 vc->vc_disp_ctrl = 1;
1198 vc->vc_toggle_meta = 0;
1200 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1201 * Select second alternate font, toggle
1202 * high bit before displaying as ROM char.
1204 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1205 vc->vc_disp_ctrl = 1;
1206 vc->vc_toggle_meta = 1;
1210 vc->vc_intensity = 1;
1216 vc->vc_underline = 0;
1224 case 38: /* ANSI X3.64-1979 (SCO-ish?)
1225 * Enables underscore, white foreground
1226 * with white underscore (Linux - use
1227 * default foreground).
1229 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1230 vc->vc_underline = 1;
1232 case 39: /* ANSI X3.64-1979 (SCO-ish?)
1233 * Disable underline option.
1234 * Reset colour to default? It did this
1237 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1238 vc->vc_underline = 0;
1241 vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f);
1244 if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37)
1245 vc->vc_color = color_table[vc->vc_par[i] - 30]
1246 | (vc->vc_color & 0xf0);
1247 else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47)
1248 vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4)
1249 | (vc->vc_color & 0x0f);
1255 static void respond_string(const char *p, struct tty_struct *tty)
1258 tty_insert_flip_char(tty, *p, 0);
1261 con_schedule_flip(tty);
1264 static void cursor_report(struct vc_data *vc, struct tty_struct *tty)
1268 sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1);
1269 respond_string(buf, tty);
1272 static inline void status_report(struct tty_struct *tty)
1274 respond_string("\033[0n", tty); /* Terminal ok */
1277 static inline void respond_ID(struct tty_struct * tty)
1279 respond_string(VT102ID, tty);
1282 void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry)
1286 sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx),
1288 respond_string(buf, tty);
1291 /* invoked via ioctl(TIOCLINUX) and through set_selection */
1292 int mouse_reporting(void)
1294 return vc_cons[fg_console].d->vc_report_mouse;
1297 /* console_sem is held */
1298 static void set_mode(struct vc_data *vc, int on_off)
1302 for (i = 0; i <= vc->vc_npar; i++)
1304 switch(vc->vc_par[i]) { /* DEC private modes set/reset */
1305 case 1: /* Cursor keys send ^[Ox/^[[x */
1307 set_kbd(vc, decckm);
1309 clr_kbd(vc, decckm);
1311 case 3: /* 80/132 mode switch unimplemented */
1312 vc->vc_deccolm = on_off;
1314 vc_resize(deccolm ? 132 : 80, vc->vc_rows);
1315 /* this alone does not suffice; some user mode
1316 utility has to change the hardware regs */
1319 case 5: /* Inverted screen on/off */
1320 if (vc->vc_decscnm != on_off) {
1321 vc->vc_decscnm = on_off;
1322 invert_screen(vc, 0, vc->vc_screenbuf_size, 0);
1326 case 6: /* Origin relative/absolute */
1327 vc->vc_decom = on_off;
1330 case 7: /* Autowrap on/off */
1331 vc->vc_decawm = on_off;
1333 case 8: /* Autorepeat on/off */
1335 set_kbd(vc, decarm);
1337 clr_kbd(vc, decarm);
1340 vc->vc_report_mouse = on_off ? 1 : 0;
1342 case 25: /* Cursor on/off */
1343 vc->vc_deccm = on_off;
1346 vc->vc_report_mouse = on_off ? 2 : 0;
1350 switch(vc->vc_par[i]) { /* ANSI modes set/reset */
1351 case 3: /* Monitor (display ctrls) */
1352 vc->vc_disp_ctrl = on_off;
1354 case 4: /* Insert Mode on/off */
1355 vc->vc_decim = on_off;
1357 case 20: /* Lf, Enter == CrLf/Lf */
1367 /* console_sem is held */
1368 static void setterm_command(struct vc_data *vc)
1370 switch(vc->vc_par[0]) {
1371 case 1: /* set color for underline mode */
1372 if (vc->vc_can_do_color &&
1373 vc->vc_par[1] < 16) {
1374 vc->vc_ulcolor = color_table[vc->vc_par[1]];
1375 if (vc->vc_underline)
1379 case 2: /* set color for half intensity mode */
1380 if (vc->vc_can_do_color &&
1381 vc->vc_par[1] < 16) {
1382 vc->vc_halfcolor = color_table[vc->vc_par[1]];
1383 if (vc->vc_intensity == 0)
1387 case 8: /* store colors as defaults */
1388 vc->vc_def_color = vc->vc_attr;
1389 if (vc->vc_hi_font_mask == 0x100)
1390 vc->vc_def_color >>= 1;
1394 case 9: /* set blanking interval */
1395 blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1396 poke_blanked_console();
1398 case 10: /* set bell frequency in Hz */
1399 if (vc->vc_npar >= 1)
1400 vc->vc_bell_pitch = vc->vc_par[1];
1402 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1404 case 11: /* set bell duration in msec */
1405 if (vc->vc_npar >= 1)
1406 vc->vc_bell_duration = (vc->vc_par[1] < 2000) ?
1407 vc->vc_par[1] * HZ / 1000 : 0;
1409 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1411 case 12: /* bring specified console to the front */
1412 if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1))
1413 set_console(vc->vc_par[1] - 1);
1415 case 13: /* unblank the screen */
1416 poke_blanked_console();
1418 case 14: /* set vesa powerdown interval */
1419 vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1421 case 15: /* activate the previous console */
1422 set_console(last_console);
1427 /* console_sem is held */
1428 static void csi_at(struct vc_data *vc, unsigned int nr)
1430 if (nr > vc->vc_cols - vc->vc_x)
1431 nr = vc->vc_cols - vc->vc_x;
1434 insert_char(vc, nr);
1437 /* console_sem is held */
1438 static void csi_L(struct vc_data *vc, unsigned int nr)
1440 if (nr > vc->vc_rows - vc->vc_y)
1441 nr = vc->vc_rows - vc->vc_y;
1444 scrdown(vc, vc->vc_y, vc->vc_bottom, nr);
1445 vc->vc_need_wrap = 0;
1448 /* console_sem is held */
1449 static void csi_P(struct vc_data *vc, unsigned int nr)
1451 if (nr > vc->vc_cols - vc->vc_x)
1452 nr = vc->vc_cols - vc->vc_x;
1455 delete_char(vc, nr);
1458 /* console_sem is held */
1459 static void csi_M(struct vc_data *vc, unsigned int nr)
1461 if (nr > vc->vc_rows - vc->vc_y)
1462 nr = vc->vc_rows - vc->vc_y;
1465 scrup(vc, vc->vc_y, vc->vc_bottom, nr);
1466 vc->vc_need_wrap = 0;
1469 /* console_sem is held (except via vc_init->reset_terminal */
1470 static void save_cur(struct vc_data *vc)
1472 vc->vc_saved_x = vc->vc_x;
1473 vc->vc_saved_y = vc->vc_y;
1474 vc->vc_s_intensity = vc->vc_intensity;
1475 vc->vc_s_italic = vc->vc_italic;
1476 vc->vc_s_underline = vc->vc_underline;
1477 vc->vc_s_blink = vc->vc_blink;
1478 vc->vc_s_reverse = vc->vc_reverse;
1479 vc->vc_s_charset = vc->vc_charset;
1480 vc->vc_s_color = vc->vc_color;
1481 vc->vc_saved_G0 = vc->vc_G0_charset;
1482 vc->vc_saved_G1 = vc->vc_G1_charset;
1485 /* console_sem is held */
1486 static void restore_cur(struct vc_data *vc)
1488 gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y);
1489 vc->vc_intensity = vc->vc_s_intensity;
1490 vc->vc_italic = vc->vc_s_italic;
1491 vc->vc_underline = vc->vc_s_underline;
1492 vc->vc_blink = vc->vc_s_blink;
1493 vc->vc_reverse = vc->vc_s_reverse;
1494 vc->vc_charset = vc->vc_s_charset;
1495 vc->vc_color = vc->vc_s_color;
1496 vc->vc_G0_charset = vc->vc_saved_G0;
1497 vc->vc_G1_charset = vc->vc_saved_G1;
1498 vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc);
1500 vc->vc_need_wrap = 0;
1503 enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey,
1504 EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd,
1507 /* console_sem is held (except via vc_init()) */
1508 static void reset_terminal(struct vc_data *vc, int do_clear)
1511 vc->vc_bottom = vc->vc_rows;
1512 vc->vc_state = ESnormal;
1514 vc->vc_translate = set_translate(LAT1_MAP, vc);
1515 vc->vc_G0_charset = LAT1_MAP;
1516 vc->vc_G1_charset = GRAF_MAP;
1518 vc->vc_need_wrap = 0;
1519 vc->vc_report_mouse = 0;
1521 vc->vc_utf_count = 0;
1523 vc->vc_disp_ctrl = 0;
1524 vc->vc_toggle_meta = 0;
1532 set_kbd(vc, decarm);
1533 clr_kbd(vc, decckm);
1534 clr_kbd(vc, kbdapplic);
1536 kbd_table[vc->vc_num].lockstate = 0;
1537 kbd_table[vc->vc_num].slockstate = 0;
1538 kbd_table[vc->vc_num].ledmode = LED_SHOW_FLAGS;
1539 kbd_table[vc->vc_num].ledflagstate = kbd_table[vc->vc_num].default_ledflagstate;
1540 /* do not do set_leds here because this causes an endless tasklet loop
1541 when the keyboard hasn't been initialized yet */
1543 vc->vc_cursor_type = CUR_DEFAULT;
1544 vc->vc_complement_mask = vc->vc_s_complement_mask;
1549 vc->vc_tab_stop[0] = 0x01010100;
1550 vc->vc_tab_stop[1] =
1551 vc->vc_tab_stop[2] =
1552 vc->vc_tab_stop[3] =
1553 vc->vc_tab_stop[4] = 0x01010101;
1555 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1556 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1564 /* console_sem is held */
1565 static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
1568 * Control characters can be used in the _middle_
1569 * of an escape sequence.
1575 if (vc->vc_bell_duration)
1576 kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration);
1582 vc->vc_pos -= (vc->vc_x << 1);
1583 while (vc->vc_x < vc->vc_cols - 1) {
1585 if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31)))
1588 vc->vc_pos += (vc->vc_x << 1);
1590 case 10: case 11: case 12:
1592 if (!is_kbd(vc, lnm))
1599 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1600 vc->vc_disp_ctrl = 1;
1604 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1605 vc->vc_disp_ctrl = 0;
1608 vc->vc_state = ESnormal;
1611 vc->vc_state = ESesc;
1617 vc->vc_state = ESsquare;
1620 switch(vc->vc_state) {
1622 vc->vc_state = ESnormal;
1625 vc->vc_state = ESsquare;
1628 vc->vc_state = ESnonstd;
1631 vc->vc_state = ESpercent;
1644 vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31));
1656 vc->vc_state = ESsetG0;
1659 vc->vc_state = ESsetG1;
1662 vc->vc_state = EShash;
1665 reset_terminal(vc, 1);
1667 case '>': /* Numeric keypad */
1668 clr_kbd(vc, kbdapplic);
1670 case '=': /* Appl. keypad */
1671 set_kbd(vc, kbdapplic);
1676 if (c=='P') { /* palette escape sequence */
1677 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1678 vc->vc_par[vc->vc_npar] = 0;
1680 vc->vc_state = ESpalette;
1682 } else if (c=='R') { /* reset palette */
1684 vc->vc_state = ESnormal;
1686 vc->vc_state = ESnormal;
1689 if ( (c>='0'&&c<='9') || (c>='A'&&c<='F') || (c>='a'&&c<='f') ) {
1690 vc->vc_par[vc->vc_npar++] = (c > '9' ? (c & 0xDF) - 'A' + 10 : c - '0');
1691 if (vc->vc_npar == 7) {
1692 int i = vc->vc_par[0] * 3, j = 1;
1693 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1694 vc->vc_palette[i++] += vc->vc_par[j++];
1695 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1696 vc->vc_palette[i++] += vc->vc_par[j++];
1697 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1698 vc->vc_palette[i] += vc->vc_par[j];
1700 vc->vc_state = ESnormal;
1703 vc->vc_state = ESnormal;
1706 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1707 vc->vc_par[vc->vc_npar] = 0;
1709 vc->vc_state = ESgetpars;
1710 if (c == '[') { /* Function key */
1711 vc->vc_state=ESfunckey;
1714 vc->vc_ques = (c == '?');
1718 if (c == ';' && vc->vc_npar < NPAR - 1) {
1721 } else if (c>='0' && c<='9') {
1722 vc->vc_par[vc->vc_npar] *= 10;
1723 vc->vc_par[vc->vc_npar] += c - '0';
1726 vc->vc_state = ESgotpars;
1728 vc->vc_state = ESnormal;
1739 vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16);
1741 vc->vc_cursor_type = CUR_DEFAULT;
1749 vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1];
1751 vc->vc_complement_mask = vc->vc_s_complement_mask;
1757 if (vc->vc_par[0] == 5)
1759 else if (vc->vc_par[0] == 6)
1760 cursor_report(vc, tty);
1772 gotoxy(vc, vc->vc_par[0], vc->vc_y);
1777 gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]);
1782 gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]);
1787 gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y);
1792 gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y);
1797 gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]);
1802 gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]);
1807 gotoxay(vc, vc->vc_x ,vc->vc_par[0]);
1814 gotoxay(vc, vc->vc_par[1], vc->vc_par[0]);
1817 csi_J(vc, vc->vc_par[0]);
1820 csi_K(vc, vc->vc_par[0]);
1823 csi_L(vc, vc->vc_par[0]);
1826 csi_M(vc, vc->vc_par[0]);
1829 csi_P(vc, vc->vc_par[0]);
1837 vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31));
1838 else if (vc->vc_par[0] == 3) {
1839 vc->vc_tab_stop[0] =
1840 vc->vc_tab_stop[1] =
1841 vc->vc_tab_stop[2] =
1842 vc->vc_tab_stop[3] =
1843 vc->vc_tab_stop[4] = 0;
1849 case 'q': /* DECLL - but only 3 leds */
1850 /* map 0,1,2,3 to 0,1,2,4 */
1851 if (vc->vc_par[0] < 4)
1852 setledstate(kbd_table + vc->vc_num,
1853 (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4);
1859 vc->vc_par[1] = vc->vc_rows;
1860 /* Minimum allowed region is 2 lines */
1861 if (vc->vc_par[0] < vc->vc_par[1] &&
1862 vc->vc_par[1] <= vc->vc_rows) {
1863 vc->vc_top = vc->vc_par[0] - 1;
1864 vc->vc_bottom = vc->vc_par[1];
1875 csi_X(vc, vc->vc_par[0]);
1878 csi_at(vc, vc->vc_par[0]);
1880 case ']': /* setterm functions */
1881 setterm_command(vc);
1886 vc->vc_state = ESnormal;
1888 case '@': /* defined in ISO 2022 */
1891 case 'G': /* prelim official escape code */
1892 case '8': /* retained for compatibility */
1898 vc->vc_state = ESnormal;
1901 vc->vc_state = ESnormal;
1903 /* DEC screen alignment test. kludge :-) */
1904 vc->vc_video_erase_char =
1905 (vc->vc_video_erase_char & 0xff00) | 'E';
1907 vc->vc_video_erase_char =
1908 (vc->vc_video_erase_char & 0xff00) | ' ';
1909 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
1914 vc->vc_G0_charset = GRAF_MAP;
1916 vc->vc_G0_charset = LAT1_MAP;
1918 vc->vc_G0_charset = IBMPC_MAP;
1920 vc->vc_G0_charset = USER_MAP;
1921 if (vc->vc_charset == 0)
1922 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1923 vc->vc_state = ESnormal;
1927 vc->vc_G1_charset = GRAF_MAP;
1929 vc->vc_G1_charset = LAT1_MAP;
1931 vc->vc_G1_charset = IBMPC_MAP;
1933 vc->vc_G1_charset = USER_MAP;
1934 if (vc->vc_charset == 1)
1935 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1936 vc->vc_state = ESnormal;
1939 vc->vc_state = ESnormal;
1943 /* This is a temporary buffer used to prepare a tty console write
1944 * so that we can easily avoid touching user space while holding the
1945 * console spinlock. It is allocated in con_init and is shared by
1946 * this code and the vc_screen read/write tty calls.
1948 * We have to allocate this statically in the kernel data section
1949 * since console_init (and thus con_init) are called before any
1950 * kernel memory allocation is available.
1952 char con_buf[CON_BUF_SIZE];
1953 DECLARE_MUTEX(con_buf_sem);
1955 /* is_double_width() is based on the wcwidth() implementation by
1956 * Markus Kuhn -- 2003-05-20 (Unicode 4.0)
1957 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
1964 static int bisearch(uint32_t ucs, const struct interval *table, int max)
1969 if (ucs < table[0].first || ucs > table[max].last)
1971 while (max >= min) {
1972 mid = (min + max) / 2;
1973 if (ucs > table[mid].last)
1975 else if (ucs < table[mid].first)
1983 static int is_double_width(uint32_t ucs)
1985 static const struct interval double_width[] = {
1986 { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E },
1987 { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF },
1988 { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 }, { 0xFFE0, 0xFFE6 },
1989 { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD }
1991 return bisearch(ucs, double_width,
1992 sizeof(double_width) / sizeof(*double_width) - 1);
1995 /* acquires console_sem */
1996 static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count)
1998 #ifdef VT_BUF_VRAM_ONLY
1999 #define FLUSH do { } while(0);
2001 #define FLUSH if (draw_x >= 0) { \
2002 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
2007 int c, tc, ok, n = 0, draw_x = -1;
2008 unsigned int currcons;
2009 unsigned long draw_from = 0, draw_to = 0;
2011 unsigned char vc_attr;
2015 u16 himask, charmask;
2016 const unsigned char *orig_buf = NULL;
2024 acquire_console_sem();
2025 vc = tty->driver_data;
2027 printk(KERN_ERR "vt: argh, driver_data is NULL !\n");
2028 release_console_sem();
2032 currcons = vc->vc_num;
2033 if (!vc_cons_allocated(currcons)) {
2034 /* could this happen? */
2035 static int error = 0;
2038 printk("con_write: tty %d not allocated\n", currcons+1);
2040 release_console_sem();
2043 release_console_sem();
2048 /* At this point 'buf' is guaranteed to be a kernel buffer
2049 * and therefore no access to userspace (and therefore sleeping)
2050 * will be needed. The con_buf_sem serializes all tty based
2051 * console rendering and vcs write/read operations. We hold
2052 * the console spinlock during the entire write.
2055 acquire_console_sem();
2057 vc = tty->driver_data;
2059 printk(KERN_ERR "vt: argh, driver_data _became_ NULL !\n");
2060 release_console_sem();
2064 himask = vc->vc_hi_font_mask;
2065 charmask = himask ? 0x1ff : 0xff;
2067 /* undraw cursor first */
2071 while (!tty->stopped && count) {
2081 /* Do no translation at all in control states */
2082 if (vc->vc_state != ESnormal) {
2084 } else if (vc->vc_utf && !vc->vc_disp_ctrl) {
2085 /* Combine UTF-8 into Unicode in vc_utf_char.
2086 * vc_utf_count is the number of continuation bytes still
2087 * expected to arrive.
2088 * vc_npar is the number of continuation bytes arrived so
2092 if ((c & 0xc0) == 0x80) {
2093 /* Continuation byte received */
2094 static const uint32_t utf8_length_changes[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff };
2095 if (vc->vc_utf_count) {
2096 vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f);
2098 if (--vc->vc_utf_count) {
2099 /* Still need some bytes */
2102 /* Got a whole character */
2103 c = vc->vc_utf_char;
2104 /* Reject overlong sequences */
2105 if (c <= utf8_length_changes[vc->vc_npar - 1] ||
2106 c > utf8_length_changes[vc->vc_npar])
2109 /* Unexpected continuation byte */
2110 vc->vc_utf_count = 0;
2114 /* Single ASCII byte or first byte of a sequence received */
2115 if (vc->vc_utf_count) {
2116 /* Continuation byte expected */
2118 vc->vc_utf_count = 0;
2120 } else if (c > 0x7f) {
2121 /* First byte of a multibyte sequence received */
2123 if ((c & 0xe0) == 0xc0) {
2124 vc->vc_utf_count = 1;
2125 vc->vc_utf_char = (c & 0x1f);
2126 } else if ((c & 0xf0) == 0xe0) {
2127 vc->vc_utf_count = 2;
2128 vc->vc_utf_char = (c & 0x0f);
2129 } else if ((c & 0xf8) == 0xf0) {
2130 vc->vc_utf_count = 3;
2131 vc->vc_utf_char = (c & 0x07);
2132 } else if ((c & 0xfc) == 0xf8) {
2133 vc->vc_utf_count = 4;
2134 vc->vc_utf_char = (c & 0x03);
2135 } else if ((c & 0xfe) == 0xfc) {
2136 vc->vc_utf_count = 5;
2137 vc->vc_utf_char = (c & 0x01);
2139 /* 254 and 255 are invalid */
2142 if (vc->vc_utf_count) {
2143 /* Still need some bytes */
2147 /* Nothing to do if an ASCII byte was received */
2149 /* End of UTF-8 decoding. */
2150 /* c is the received character, or U+FFFD for invalid sequences. */
2151 /* Replace invalid Unicode code points with U+FFFD too */
2152 if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff)
2155 } else { /* no utf or alternate charset mode */
2156 tc = vc->vc_translate[vc->vc_toggle_meta ? (c | 0x80) : c];
2159 /* If the original code was a control character we
2160 * only allow a glyph to be displayed if the code is
2161 * not normally used (such as for cursor movement) or
2162 * if the disp_ctrl mode has been explicitly enabled.
2163 * Certain characters (as given by the CTRL_ALWAYS
2164 * bitmap) are always displayed as control characters,
2165 * as the console would be pretty useless without
2166 * them; to display an arbitrary font position use the
2167 * direct-to-font zone in UTF-8 mode.
2169 ok = tc && (c >= 32 ||
2170 !(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 :
2171 vc->vc_utf || ((CTRL_ACTION >> c) & 1)))
2172 && (c != 127 || vc->vc_disp_ctrl)
2175 if (vc->vc_state == ESnormal && ok) {
2176 if (vc->vc_utf && !vc->vc_disp_ctrl) {
2177 if (is_double_width(c))
2180 /* Now try to find out how to display it */
2181 tc = conv_uni_to_pc(vc, tc);
2182 if (tc & ~charmask) {
2183 if (tc == -1 || tc == -2) {
2184 continue; /* nothing to display */
2186 /* Glyph not found */
2187 if (!(vc->vc_utf && !vc->vc_disp_ctrl) && !(c & ~charmask)) {
2188 /* In legacy mode use the glyph we get by a 1:1 mapping.
2189 This would make absolutely no sense with Unicode in mind. */
2192 /* Display U+FFFD. If it's not found, display an inverse question mark. */
2193 tc = conv_uni_to_pc(vc, 0xfffd);
2196 tc = conv_uni_to_pc(vc, '?');
2197 if (tc < 0) tc = '?';
2203 vc_attr = vc->vc_attr;
2205 /* invert vc_attr */
2206 if (!vc->vc_can_do_color) {
2207 vc_attr = (vc->vc_attr) ^ 0x08;
2208 } else if (vc->vc_hi_font_mask == 0x100) {
2209 vc_attr = ((vc->vc_attr) & 0x11) | (((vc->vc_attr) & 0xe0) >> 4) | (((vc->vc_attr) & 0x0e) << 4);
2211 vc_attr = ((vc->vc_attr) & 0x88) | (((vc->vc_attr) & 0x70) >> 4) | (((vc->vc_attr) & 0x07) << 4);
2216 if (vc->vc_need_wrap || vc->vc_decim)
2218 if (vc->vc_need_wrap) {
2225 ((vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) :
2226 (vc_attr << 8) + tc,
2227 (u16 *) vc->vc_pos);
2228 if (DO_UPDATE(vc) && draw_x < 0) {
2230 draw_from = vc->vc_pos;
2232 if (vc->vc_x == vc->vc_cols - 1) {
2233 vc->vc_need_wrap = vc->vc_decawm;
2234 draw_to = vc->vc_pos + 2;
2237 draw_to = (vc->vc_pos += 2);
2240 if (!--width) break;
2242 tc = conv_uni_to_pc(vc, ' '); /* A space is printed in the second column */
2243 if (tc < 0) tc = ' ';
2251 goto rescan_last_byte;
2256 do_con_trol(tty, vc, orig);
2259 console_conditional_schedule();
2260 release_console_sem();
2268 * This is the console switching callback.
2270 * Doing console switching in a process context allows
2271 * us to do the switches asynchronously (needed when we want
2272 * to switch due to a keyboard interrupt). Synchronization
2273 * with other console code and prevention of re-entrancy is
2274 * ensured with console_sem.
2276 static void console_callback(struct work_struct *ignored)
2278 acquire_console_sem();
2280 if (want_console >= 0) {
2281 if (want_console != fg_console &&
2282 vc_cons_allocated(want_console)) {
2283 hide_cursor(vc_cons[fg_console].d);
2284 change_console(vc_cons[want_console].d);
2285 /* we only changed when the console had already
2286 been allocated - a new console is not created
2287 in an interrupt routine */
2291 if (do_poke_blanked_console) { /* do not unblank for a LED change */
2292 do_poke_blanked_console = 0;
2293 poke_blanked_console();
2295 if (scrollback_delta) {
2296 struct vc_data *vc = vc_cons[fg_console].d;
2298 if (vc->vc_mode == KD_TEXT)
2299 vc->vc_sw->con_scrolldelta(vc, scrollback_delta);
2300 scrollback_delta = 0;
2302 if (blank_timer_expired) {
2304 blank_timer_expired = 0;
2307 release_console_sem();
2310 int set_console(int nr)
2312 struct vc_data *vc = vc_cons[fg_console].d;
2314 if (!vc_cons_allocated(nr) || vt_dont_switch ||
2315 (vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) {
2318 * Console switch will fail in console_callback() or
2319 * change_console() so there is no point scheduling
2322 * Existing set_console() users don't check the return
2323 * value so this shouldn't break anything
2329 schedule_console_callback();
2334 struct tty_driver *console_driver;
2336 #ifdef CONFIG_VT_CONSOLE
2339 * Console on virtual terminal
2341 * The console must be locked when we get here.
2344 static void vt_console_print(struct console *co, const char *b, unsigned count)
2346 struct vc_data *vc = vc_cons[fg_console].d;
2348 static unsigned long printing;
2349 const ushort *start;
2353 /* console busy or not yet initialized */
2354 if (!printable || test_and_set_bit(0, &printing))
2357 if (kmsg_redirect && vc_cons_allocated(kmsg_redirect - 1))
2358 vc = vc_cons[kmsg_redirect - 1].d;
2360 /* read `x' only after setting currcons properly (otherwise
2361 the `x' macro will read the x of the foreground console). */
2364 if (!vc_cons_allocated(fg_console)) {
2366 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2370 if (vc->vc_mode != KD_TEXT)
2373 /* undraw cursor first */
2377 start = (ushort *)vc->vc_pos;
2379 /* Contrived structure to try to emulate original need_wrap behaviour
2380 * Problems caused when we have need_wrap set on '\n' character */
2383 if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) {
2385 if (CON_IS_VISIBLE(vc))
2386 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2388 if (vc->vc_need_wrap)
2392 if (c == 8) { /* backspace */
2394 start = (ushort *)vc->vc_pos;
2401 start = (ushort *)vc->vc_pos;
2403 if (c == 10 || c == 13)
2406 scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos);
2408 if (myx == vc->vc_cols - 1) {
2409 vc->vc_need_wrap = 1;
2416 if (CON_IS_VISIBLE(vc))
2417 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2419 if (vc->vc_x == vc->vc_cols) {
2421 vc->vc_need_wrap = 1;
2427 clear_bit(0, &printing);
2430 static struct tty_driver *vt_console_device(struct console *c, int *index)
2432 *index = c->index ? c->index-1 : fg_console;
2433 return console_driver;
2436 static struct console vt_console_driver = {
2438 .write = vt_console_print,
2439 .device = vt_console_device,
2440 .unblank = unblank_screen,
2441 .flags = CON_PRINTBUFFER,
2447 * Handling of Linux-specific VC ioctls
2451 * Generally a bit racy with respect to console_sem().
2453 * There are some functions which don't need it.
2455 * There are some functions which can sleep for arbitrary periods
2456 * (paste_selection) but we don't need the lock there anyway.
2458 * set_selection has locking, and definitely needs it
2461 int tioclinux(struct tty_struct *tty, unsigned long arg)
2464 char __user *p = (char __user *)arg;
2468 if (tty->driver->type != TTY_DRIVER_TYPE_CONSOLE)
2470 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN))
2472 if (get_user(type, p))
2478 acquire_console_sem();
2479 ret = set_selection((struct tiocl_selection __user *)(p+1), tty);
2480 release_console_sem();
2482 case TIOCL_PASTESEL:
2483 ret = paste_selection(tty);
2485 case TIOCL_UNBLANKSCREEN:
2486 acquire_console_sem();
2488 release_console_sem();
2490 case TIOCL_SELLOADLUT:
2491 ret = sel_loadlut(p);
2493 case TIOCL_GETSHIFTSTATE:
2496 * Make it possible to react to Shift+Mousebutton.
2497 * Note that 'shift_state' is an undocumented
2498 * kernel-internal variable; programs not closely
2499 * related to the kernel should not use this.
2502 ret = __put_user(data, p);
2504 case TIOCL_GETMOUSEREPORTING:
2505 data = mouse_reporting();
2506 ret = __put_user(data, p);
2508 case TIOCL_SETVESABLANK:
2509 ret = set_vesa_blanking(p);
2511 case TIOCL_GETKMSGREDIRECT:
2512 data = kmsg_redirect;
2513 ret = __put_user(data, p);
2515 case TIOCL_SETKMSGREDIRECT:
2516 if (!capable(CAP_SYS_ADMIN)) {
2519 if (get_user(data, p+1))
2522 kmsg_redirect = data;
2525 case TIOCL_GETFGCONSOLE:
2528 case TIOCL_SCROLLCONSOLE:
2529 if (get_user(lines, (s32 __user *)(p+4))) {
2532 scrollfront(vc_cons[fg_console].d, lines);
2536 case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
2537 acquire_console_sem();
2540 release_console_sem();
2542 case TIOCL_BLANKEDSCREEN:
2543 ret = console_blanked;
2553 * /dev/ttyN handling
2556 static int con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2560 retval = do_con_write(tty, buf, count);
2561 con_flush_chars(tty);
2566 static void con_put_char(struct tty_struct *tty, unsigned char ch)
2569 return; /* n_r3964 calls put_char() from interrupt context */
2570 do_con_write(tty, &ch, 1);
2573 static int con_write_room(struct tty_struct *tty)
2577 return 4096; /* No limit, really; we're not buffering */
2580 static int con_chars_in_buffer(struct tty_struct *tty)
2582 return 0; /* we're not buffering */
2586 * con_throttle and con_unthrottle are only used for
2587 * paste_selection(), which has to stuff in a large number of
2590 static void con_throttle(struct tty_struct *tty)
2594 static void con_unthrottle(struct tty_struct *tty)
2596 struct vc_data *vc = tty->driver_data;
2598 wake_up_interruptible(&vc->paste_wait);
2602 * Turn the Scroll-Lock LED on when the tty is stopped
2604 static void con_stop(struct tty_struct *tty)
2609 console_num = tty->index;
2610 if (!vc_cons_allocated(console_num))
2612 set_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2617 * Turn the Scroll-Lock LED off when the console is started
2619 static void con_start(struct tty_struct *tty)
2624 console_num = tty->index;
2625 if (!vc_cons_allocated(console_num))
2627 clr_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2631 static void con_flush_chars(struct tty_struct *tty)
2635 if (in_interrupt()) /* from flush_to_ldisc */
2638 /* if we race with con_close(), vt may be null */
2639 acquire_console_sem();
2640 vc = tty->driver_data;
2643 release_console_sem();
2647 * Allocate the console screen memory.
2649 static int con_open(struct tty_struct *tty, struct file *filp)
2651 unsigned int currcons = tty->index;
2654 acquire_console_sem();
2655 if (tty->driver_data == NULL) {
2656 ret = vc_allocate(currcons);
2658 struct vc_data *vc = vc_cons[currcons].d;
2659 tty->driver_data = vc;
2662 if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
2663 tty->winsize.ws_row = vc_cons[currcons].d->vc_rows;
2664 tty->winsize.ws_col = vc_cons[currcons].d->vc_cols;
2666 release_console_sem();
2667 vcs_make_sysfs(tty);
2671 release_console_sem();
2676 * We take tty_mutex in here to prevent another thread from coming in via init_dev
2677 * and taking a ref against the tty while we're in the process of forgetting
2678 * about it and cleaning things up.
2680 * This is because vcs_remove_sysfs() can sleep and will drop the BKL.
2682 static void con_close(struct tty_struct *tty, struct file *filp)
2684 mutex_lock(&tty_mutex);
2685 acquire_console_sem();
2686 if (tty && tty->count == 1) {
2687 struct vc_data *vc = tty->driver_data;
2691 tty->driver_data = NULL;
2692 release_console_sem();
2693 vcs_remove_sysfs(tty);
2694 mutex_unlock(&tty_mutex);
2696 * tty_mutex is released, but we still hold BKL, so there is
2697 * still exclusion against init_dev()
2701 release_console_sem();
2702 mutex_unlock(&tty_mutex);
2705 static int default_italic_color = 2; // green (ASCII)
2706 static int default_underline_color = 3; // cyan (ASCII)
2707 module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR);
2708 module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR);
2710 static void vc_init(struct vc_data *vc, unsigned int rows,
2711 unsigned int cols, int do_clear)
2717 vc->vc_size_row = cols << 1;
2718 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
2721 vc->vc_pos = vc->vc_origin;
2723 for (j=k=0; j<16; j++) {
2724 vc->vc_palette[k++] = default_red[j] ;
2725 vc->vc_palette[k++] = default_grn[j] ;
2726 vc->vc_palette[k++] = default_blu[j] ;
2728 vc->vc_def_color = 0x07; /* white */
2729 vc->vc_ulcolor = default_underline_color;
2730 vc->vc_itcolor = default_italic_color;
2731 vc->vc_halfcolor = 0x08; /* grey */
2732 init_waitqueue_head(&vc->paste_wait);
2733 reset_terminal(vc, do_clear);
2737 * This routine initializes console interrupts, and does nothing
2738 * else. If you want the screen to clear, call tty_write with
2739 * the appropriate escape-sequence.
2742 static int __init con_init(void)
2744 const char *display_desc = NULL;
2746 unsigned int currcons = 0, i;
2748 acquire_console_sem();
2751 display_desc = conswitchp->con_startup();
2752 if (!display_desc) {
2754 release_console_sem();
2758 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2759 struct con_driver *con_driver = ®istered_con_driver[i];
2761 if (con_driver->con == NULL) {
2762 con_driver->con = conswitchp;
2763 con_driver->desc = display_desc;
2764 con_driver->flag = CON_DRIVER_FLAG_INIT;
2765 con_driver->first = 0;
2766 con_driver->last = MAX_NR_CONSOLES - 1;
2771 for (i = 0; i < MAX_NR_CONSOLES; i++)
2772 con_driver_map[i] = conswitchp;
2774 if (blankinterval) {
2775 blank_state = blank_normal_wait;
2776 mod_timer(&console_timer, jiffies + blankinterval);
2780 * kmalloc is not running yet - we use the bootmem allocator.
2782 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) {
2783 vc_cons[currcons].d = vc = alloc_bootmem(sizeof(struct vc_data));
2784 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
2785 visual_init(vc, currcons, 1);
2786 vc->vc_screenbuf = (unsigned short *)alloc_bootmem(vc->vc_screenbuf_size);
2787 vc->vc_kmalloced = 0;
2788 vc_init(vc, vc->vc_rows, vc->vc_cols,
2789 currcons || !vc->vc_sw->con_save_screen);
2791 currcons = fg_console = 0;
2792 master_display_fg = vc = vc_cons[currcons].d;
2795 gotoxy(vc, vc->vc_x, vc->vc_y);
2798 printk("Console: %s %s %dx%d",
2799 vc->vc_can_do_color ? "colour" : "mono",
2800 display_desc, vc->vc_cols, vc->vc_rows);
2804 release_console_sem();
2806 #ifdef CONFIG_VT_CONSOLE
2807 register_console(&vt_console_driver);
2811 console_initcall(con_init);
2813 static const struct tty_operations con_ops = {
2817 .write_room = con_write_room,
2818 .put_char = con_put_char,
2819 .flush_chars = con_flush_chars,
2820 .chars_in_buffer = con_chars_in_buffer,
2824 .throttle = con_throttle,
2825 .unthrottle = con_unthrottle,
2828 int __init vty_init(void)
2832 console_driver = alloc_tty_driver(MAX_NR_CONSOLES);
2833 if (!console_driver)
2834 panic("Couldn't allocate console driver\n");
2835 console_driver->owner = THIS_MODULE;
2836 console_driver->name = "tty";
2837 console_driver->name_base = 1;
2838 console_driver->major = TTY_MAJOR;
2839 console_driver->minor_start = 1;
2840 console_driver->type = TTY_DRIVER_TYPE_CONSOLE;
2841 console_driver->init_termios = tty_std_termios;
2842 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS;
2843 tty_set_operations(console_driver, &con_ops);
2844 if (tty_register_driver(console_driver))
2845 panic("Couldn't register console driver\n");
2849 #ifdef CONFIG_PROM_CONSOLE
2852 #ifdef CONFIG_MDA_CONSOLE
2858 #ifndef VT_SINGLE_DRIVER
2859 #include <linux/device.h>
2861 static struct class *vtconsole_class;
2863 static int bind_con_driver(const struct consw *csw, int first, int last,
2866 struct module *owner = csw->owner;
2867 const char *desc = NULL;
2868 struct con_driver *con_driver;
2869 int i, j = -1, k = -1, retval = -ENODEV;
2871 if (!try_module_get(owner))
2874 acquire_console_sem();
2876 /* check if driver is registered */
2877 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2878 con_driver = ®istered_con_driver[i];
2880 if (con_driver->con == csw) {
2881 desc = con_driver->desc;
2890 if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) {
2892 con_driver->flag |= CON_DRIVER_FLAG_INIT;
2897 module_put(conswitchp->owner);
2899 __module_get(owner);
2903 first = max(first, con_driver->first);
2904 last = min(last, con_driver->last);
2906 for (i = first; i <= last; i++) {
2908 struct vc_data *vc = vc_cons[i].d;
2910 if (con_driver_map[i])
2911 module_put(con_driver_map[i]->owner);
2912 __module_get(owner);
2913 con_driver_map[i] = csw;
2915 if (!vc || !vc->vc_sw)
2920 if (CON_IS_VISIBLE(vc)) {
2925 old_was_color = vc->vc_can_do_color;
2926 vc->vc_sw->con_deinit(vc);
2927 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
2928 visual_init(vc, i, 0);
2932 /* If the console changed between mono <-> color, then
2933 * the attributes in the screenbuf will be wrong. The
2934 * following resets all attributes to something sane.
2936 if (old_was_color != vc->vc_can_do_color)
2937 clear_buffer_attributes(vc);
2940 printk("Console: switching ");
2942 printk("consoles %d-%d ", first+1, last+1);
2944 struct vc_data *vc = vc_cons[j].d;
2946 printk("to %s %s %dx%d\n",
2947 vc->vc_can_do_color ? "colour" : "mono",
2948 desc, vc->vc_cols, vc->vc_rows);
2955 printk("to %s\n", desc);
2959 release_console_sem();
2964 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
2965 static int con_is_graphics(const struct consw *csw, int first, int last)
2969 for (i = first; i <= last; i++) {
2970 struct vc_data *vc = vc_cons[i].d;
2972 if (vc && vc->vc_mode == KD_GRAPHICS) {
2981 static int unbind_con_driver(const struct consw *csw, int first, int last,
2984 struct module *owner = csw->owner;
2985 const struct consw *defcsw = NULL;
2986 struct con_driver *con_driver = NULL, *con_back = NULL;
2987 int i, retval = -ENODEV;
2989 if (!try_module_get(owner))
2992 acquire_console_sem();
2994 /* check if driver is registered and if it is unbindable */
2995 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2996 con_driver = ®istered_con_driver[i];
2998 if (con_driver->con == csw &&
2999 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3006 release_console_sem();
3012 /* check if backup driver exists */
3013 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3014 con_back = ®istered_con_driver[i];
3016 if (con_back->con &&
3017 !(con_back->flag & CON_DRIVER_FLAG_MODULE)) {
3018 defcsw = con_back->con;
3025 release_console_sem();
3029 if (!con_is_bound(csw)) {
3030 release_console_sem();
3034 first = max(first, con_driver->first);
3035 last = min(last, con_driver->last);
3037 for (i = first; i <= last; i++) {
3038 if (con_driver_map[i] == csw) {
3039 module_put(csw->owner);
3040 con_driver_map[i] = NULL;
3044 if (!con_is_bound(defcsw)) {
3045 const struct consw *defconsw = conswitchp;
3047 defcsw->con_startup();
3048 con_back->flag |= CON_DRIVER_FLAG_INIT;
3050 * vgacon may change the default driver to point
3051 * to dummycon, we restore it here...
3053 conswitchp = defconsw;
3056 if (!con_is_bound(csw))
3057 con_driver->flag &= ~CON_DRIVER_FLAG_INIT;
3059 release_console_sem();
3060 /* ignore return value, binding should not fail */
3061 bind_con_driver(defcsw, first, last, deflt);
3068 static int vt_bind(struct con_driver *con)
3070 const struct consw *defcsw = NULL, *csw = NULL;
3071 int i, more = 1, first = -1, last = -1, deflt = 0;
3073 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3074 con_is_graphics(con->con, con->first, con->last))
3079 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3080 struct con_driver *con = ®istered_con_driver[i];
3082 if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) {
3094 for (i = con->first; i <= con->last; i++) {
3095 if (con_driver_map[i] == defcsw) {
3100 } else if (first != -1)
3104 if (first == 0 && last == MAX_NR_CONSOLES -1)
3108 bind_con_driver(csw, first, last, deflt);
3119 static int vt_unbind(struct con_driver *con)
3121 const struct consw *csw = NULL;
3122 int i, more = 1, first = -1, last = -1, deflt = 0;
3124 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3125 con_is_graphics(con->con, con->first, con->last))
3133 for (i = con->first; i <= con->last; i++) {
3134 if (con_driver_map[i] == csw) {
3139 } else if (first != -1)
3143 if (first == 0 && last == MAX_NR_CONSOLES -1)
3147 unbind_con_driver(csw, first, last, deflt);
3158 static inline int vt_bind(struct con_driver *con)
3162 static inline int vt_unbind(struct con_driver *con)
3166 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3168 static ssize_t store_bind(struct device *dev, struct device_attribute *attr,
3169 const char *buf, size_t count)
3171 struct con_driver *con = dev_get_drvdata(dev);
3172 int bind = simple_strtoul(buf, NULL, 0);
3182 static ssize_t show_bind(struct device *dev, struct device_attribute *attr,
3185 struct con_driver *con = dev_get_drvdata(dev);
3186 int bind = con_is_bound(con->con);
3188 return snprintf(buf, PAGE_SIZE, "%i\n", bind);
3191 static ssize_t show_name(struct device *dev, struct device_attribute *attr,
3194 struct con_driver *con = dev_get_drvdata(dev);
3196 return snprintf(buf, PAGE_SIZE, "%s %s\n",
3197 (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)",
3202 static struct device_attribute device_attrs[] = {
3203 __ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind),
3204 __ATTR(name, S_IRUGO, show_name, NULL),
3207 static int vtconsole_init_device(struct con_driver *con)
3212 con->flag |= CON_DRIVER_FLAG_ATTR;
3213 dev_set_drvdata(con->dev, con);
3214 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3215 error = device_create_file(con->dev, &device_attrs[i]);
3222 device_remove_file(con->dev, &device_attrs[i]);
3223 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3229 static void vtconsole_deinit_device(struct con_driver *con)
3233 if (con->flag & CON_DRIVER_FLAG_ATTR) {
3234 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3235 device_remove_file(con->dev, &device_attrs[i]);
3236 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3241 * con_is_bound - checks if driver is bound to the console
3242 * @csw: console driver
3244 * RETURNS: zero if unbound, nonzero if bound
3246 * Drivers can call this and if zero, they should release
3247 * all resources allocated on con_startup()
3249 int con_is_bound(const struct consw *csw)
3253 for (i = 0; i < MAX_NR_CONSOLES; i++) {
3254 if (con_driver_map[i] == csw) {
3262 EXPORT_SYMBOL(con_is_bound);
3265 * register_con_driver - register console driver to console layer
3266 * @csw: console driver
3267 * @first: the first console to take over, minimum value is 0
3268 * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1
3270 * DESCRIPTION: This function registers a console driver which can later
3271 * bind to a range of consoles specified by @first and @last. It will
3272 * also initialize the console driver by calling con_startup().
3274 int register_con_driver(const struct consw *csw, int first, int last)
3276 struct module *owner = csw->owner;
3277 struct con_driver *con_driver;
3281 if (!try_module_get(owner))
3284 acquire_console_sem();
3286 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3287 con_driver = ®istered_con_driver[i];
3289 /* already registered */
3290 if (con_driver->con == csw)
3297 desc = csw->con_startup();
3304 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3305 con_driver = ®istered_con_driver[i];
3307 if (con_driver->con == NULL) {
3308 con_driver->con = csw;
3309 con_driver->desc = desc;
3310 con_driver->node = i;
3311 con_driver->flag = CON_DRIVER_FLAG_MODULE |
3312 CON_DRIVER_FLAG_INIT;
3313 con_driver->first = first;
3314 con_driver->last = last;
3323 con_driver->dev = device_create(vtconsole_class, NULL,
3324 MKDEV(0, con_driver->node),
3325 "vtcon%i", con_driver->node);
3327 if (IS_ERR(con_driver->dev)) {
3328 printk(KERN_WARNING "Unable to create device for %s; "
3329 "errno = %ld\n", con_driver->desc,
3330 PTR_ERR(con_driver->dev));
3331 con_driver->dev = NULL;
3333 vtconsole_init_device(con_driver);
3337 release_console_sem();
3341 EXPORT_SYMBOL(register_con_driver);
3344 * unregister_con_driver - unregister console driver from console layer
3345 * @csw: console driver
3347 * DESCRIPTION: All drivers that registers to the console layer must
3348 * call this function upon exit, or if the console driver is in a state
3349 * where it won't be able to handle console services, such as the
3350 * framebuffer console without loaded framebuffer drivers.
3352 * The driver must unbind first prior to unregistration.
3354 int unregister_con_driver(const struct consw *csw)
3356 int i, retval = -ENODEV;
3358 acquire_console_sem();
3360 /* cannot unregister a bound driver */
3361 if (con_is_bound(csw))
3364 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3365 struct con_driver *con_driver = ®istered_con_driver[i];
3367 if (con_driver->con == csw &&
3368 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3369 vtconsole_deinit_device(con_driver);
3370 device_destroy(vtconsole_class,
3371 MKDEV(0, con_driver->node));
3372 con_driver->con = NULL;
3373 con_driver->desc = NULL;
3374 con_driver->dev = NULL;
3375 con_driver->node = 0;
3376 con_driver->flag = 0;
3377 con_driver->first = 0;
3378 con_driver->last = 0;
3384 release_console_sem();
3387 EXPORT_SYMBOL(unregister_con_driver);
3390 * If we support more console drivers, this function is used
3391 * when a driver wants to take over some existing consoles
3392 * and become default driver for newly opened ones.
3394 * take_over_console is basically a register followed by unbind
3396 int take_over_console(const struct consw *csw, int first, int last, int deflt)
3400 err = register_con_driver(csw, first, last);
3403 bind_con_driver(csw, first, last, deflt);
3409 * give_up_console is a wrapper to unregister_con_driver. It will only
3410 * work if driver is fully unbound.
3412 void give_up_console(const struct consw *csw)
3414 unregister_con_driver(csw);
3417 static int __init vtconsole_class_init(void)
3421 vtconsole_class = class_create(THIS_MODULE, "vtconsole");
3422 if (IS_ERR(vtconsole_class)) {
3423 printk(KERN_WARNING "Unable to create vt console class; "
3424 "errno = %ld\n", PTR_ERR(vtconsole_class));
3425 vtconsole_class = NULL;
3428 /* Add system drivers to sysfs */
3429 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3430 struct con_driver *con = ®istered_con_driver[i];
3432 if (con->con && !con->dev) {
3433 con->dev = device_create(vtconsole_class, NULL,
3434 MKDEV(0, con->node),
3435 "vtcon%i", con->node);
3437 if (IS_ERR(con->dev)) {
3438 printk(KERN_WARNING "Unable to create "
3439 "device for %s; errno = %ld\n",
3440 con->desc, PTR_ERR(con->dev));
3443 vtconsole_init_device(con);
3450 postcore_initcall(vtconsole_class_init);
3458 static int set_vesa_blanking(char __user *p)
3462 if (get_user(mode, p + 1))
3465 vesa_blank_mode = (mode < 4) ? mode : 0;
3469 void do_blank_screen(int entering_gfx)
3471 struct vc_data *vc = vc_cons[fg_console].d;
3474 WARN_CONSOLE_UNLOCKED();
3476 if (console_blanked) {
3477 if (blank_state == blank_vesa_wait) {
3478 blank_state = blank_off;
3479 vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0);
3483 if (blank_state != blank_normal_wait)
3485 blank_state = blank_off;
3487 /* entering graphics mode? */
3491 vc->vc_sw->con_blank(vc, -1, 1);
3492 console_blanked = fg_console + 1;
3497 /* don't blank graphics */
3498 if (vc->vc_mode != KD_TEXT) {
3499 console_blanked = fg_console + 1;
3504 del_timer_sync(&console_timer);
3505 blank_timer_expired = 0;
3508 /* In case we need to reset origin, blanking hook returns 1 */
3509 i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0);
3510 console_blanked = fg_console + 1;
3514 if (console_blank_hook && console_blank_hook(1))
3517 if (vesa_off_interval && vesa_blank_mode) {
3518 blank_state = blank_vesa_wait;
3519 mod_timer(&console_timer, jiffies + vesa_off_interval);
3522 EXPORT_SYMBOL(do_blank_screen);
3525 * Called by timer as well as from vt_console_driver
3527 void do_unblank_screen(int leaving_gfx)
3531 /* This should now always be called from a "sane" (read: can schedule)
3532 * context for the sake of the low level drivers, except in the special
3533 * case of oops_in_progress
3535 if (!oops_in_progress)
3538 WARN_CONSOLE_UNLOCKED();
3541 if (!console_blanked)
3543 if (!vc_cons_allocated(fg_console)) {
3545 printk("unblank_screen: tty %d not allocated ??\n", fg_console+1);
3548 vc = vc_cons[fg_console].d;
3549 if (vc->vc_mode != KD_TEXT)
3550 return; /* but leave console_blanked != 0 */
3552 if (blankinterval) {
3553 mod_timer(&console_timer, jiffies + blankinterval);
3554 blank_state = blank_normal_wait;
3557 console_blanked = 0;
3558 if (vc->vc_sw->con_blank(vc, 0, leaving_gfx))
3559 /* Low-level driver cannot restore -> do it ourselves */
3561 if (console_blank_hook)
3562 console_blank_hook(0);
3566 EXPORT_SYMBOL(do_unblank_screen);
3569 * This is called by the outside world to cause a forced unblank, mostly for
3570 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
3571 * call it with 1 as an argument and so force a mode restore... that may kill
3572 * X or at least garbage the screen but would also make the Oops visible...
3574 void unblank_screen(void)
3576 do_unblank_screen(0);
3580 * We defer the timer blanking to work queue so it can take the console mutex
3581 * (console operations can still happen at irq time, but only from printk which
3582 * has the console mutex. Not perfect yet, but better than no locking
3584 static void blank_screen_t(unsigned long dummy)
3586 if (unlikely(!keventd_up())) {
3587 mod_timer(&console_timer, jiffies + blankinterval);
3590 blank_timer_expired = 1;
3591 schedule_work(&console_work);
3594 void poke_blanked_console(void)
3596 WARN_CONSOLE_UNLOCKED();
3598 /* Add this so we quickly catch whoever might call us in a non
3599 * safe context. Nowadays, unblank_screen() isn't to be called in
3600 * atomic contexts and is allowed to schedule (with the special case
3601 * of oops_in_progress, but that isn't of any concern for this
3606 /* This isn't perfectly race free, but a race here would be mostly harmless,
3607 * at worse, we'll do a spurrious blank and it's unlikely
3609 del_timer(&console_timer);
3610 blank_timer_expired = 0;
3612 if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS)
3614 if (console_blanked)
3616 else if (blankinterval) {
3617 mod_timer(&console_timer, jiffies + blankinterval);
3618 blank_state = blank_normal_wait;
3626 static void set_palette(struct vc_data *vc)
3628 WARN_CONSOLE_UNLOCKED();
3630 if (vc->vc_mode != KD_GRAPHICS)
3631 vc->vc_sw->con_set_palette(vc, color_table);
3634 static int set_get_cmap(unsigned char __user *arg, int set)
3638 WARN_CONSOLE_UNLOCKED();
3640 for (i = 0; i < 16; i++)
3642 get_user(default_red[i], arg++);
3643 get_user(default_grn[i], arg++);
3644 get_user(default_blu[i], arg++);
3646 put_user(default_red[i], arg++);
3647 put_user(default_grn[i], arg++);
3648 put_user(default_blu[i], arg++);
3651 for (i = 0; i < MAX_NR_CONSOLES; i++)
3652 if (vc_cons_allocated(i)) {
3653 for (j = k = 0; j < 16; j++) {
3654 vc_cons[i].d->vc_palette[k++] = default_red[j];
3655 vc_cons[i].d->vc_palette[k++] = default_grn[j];
3656 vc_cons[i].d->vc_palette[k++] = default_blu[j];
3658 set_palette(vc_cons[i].d);
3665 * Load palette into the DAC registers. arg points to a colour
3666 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
3669 int con_set_cmap(unsigned char __user *arg)
3673 acquire_console_sem();
3674 rc = set_get_cmap (arg,1);
3675 release_console_sem();
3680 int con_get_cmap(unsigned char __user *arg)
3684 acquire_console_sem();
3685 rc = set_get_cmap (arg,0);
3686 release_console_sem();
3691 void reset_palette(struct vc_data *vc)
3694 for (j=k=0; j<16; j++) {
3695 vc->vc_palette[k++] = default_red[j];
3696 vc->vc_palette[k++] = default_grn[j];
3697 vc->vc_palette[k++] = default_blu[j];
3705 * Currently we only support fonts up to 32 pixels wide, at a maximum height
3706 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
3707 * depending on width) reserved for each character which is kinda wasty, but
3708 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
3709 * is upto the actual low-level console-driver convert data into its favorite
3710 * format (maybe we should add a `fontoffset' field to the `display'
3711 * structure so we won't have to convert the fontdata all the time.
3715 #define max_font_size 65536
3717 static int con_font_get(struct vc_data *vc, struct console_font_op *op)
3719 struct console_font font;
3723 if (vc->vc_mode != KD_TEXT)
3727 font.data = kmalloc(max_font_size, GFP_KERNEL);
3733 acquire_console_sem();
3734 if (vc->vc_sw->con_font_get)
3735 rc = vc->vc_sw->con_font_get(vc, &font);
3738 release_console_sem();
3743 c = (font.width+7)/8 * 32 * font.charcount;
3745 if (op->data && font.charcount > op->charcount)
3747 if (!(op->flags & KD_FONT_FLAG_OLD)) {
3748 if (font.width > op->width || font.height > op->height)
3751 if (font.width != 8)
3753 else if ((op->height && font.height > op->height) ||
3760 op->height = font.height;
3761 op->width = font.width;
3762 op->charcount = font.charcount;
3764 if (op->data && copy_to_user(op->data, font.data, c))
3772 static int con_font_set(struct vc_data *vc, struct console_font_op *op)
3774 struct console_font font;
3778 if (vc->vc_mode != KD_TEXT)
3782 if (op->charcount > 512)
3784 if (!op->height) { /* Need to guess font height [compat] */
3786 u8 __user *charmap = op->data;
3789 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
3790 so that we can get rid of this soon */
3791 if (!(op->flags & KD_FONT_FLAG_OLD))
3793 for (h = 32; h > 0; h--)
3794 for (i = 0; i < op->charcount; i++) {
3795 if (get_user(tmp, &charmap[32*i+h-1]))
3804 if (op->width <= 0 || op->width > 32 || op->height > 32)
3806 size = (op->width+7)/8 * 32 * op->charcount;
3807 if (size > max_font_size)
3809 font.charcount = op->charcount;
3810 font.height = op->height;
3811 font.width = op->width;
3812 font.data = kmalloc(size, GFP_KERNEL);
3815 if (copy_from_user(font.data, op->data, size)) {
3819 acquire_console_sem();
3820 if (vc->vc_sw->con_font_set)
3821 rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
3824 release_console_sem();
3829 static int con_font_default(struct vc_data *vc, struct console_font_op *op)
3831 struct console_font font = {.width = op->width, .height = op->height};
3832 char name[MAX_FONT_NAME];
3836 if (vc->vc_mode != KD_TEXT)
3841 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0)
3844 name[MAX_FONT_NAME - 1] = 0;
3846 acquire_console_sem();
3847 if (vc->vc_sw->con_font_default)
3848 rc = vc->vc_sw->con_font_default(vc, &font, s);
3851 release_console_sem();
3853 op->width = font.width;
3854 op->height = font.height;
3859 static int con_font_copy(struct vc_data *vc, struct console_font_op *op)
3861 int con = op->height;
3864 if (vc->vc_mode != KD_TEXT)
3867 acquire_console_sem();
3868 if (!vc->vc_sw->con_font_copy)
3870 else if (con < 0 || !vc_cons_allocated(con))
3872 else if (con == vc->vc_num) /* nothing to do */
3875 rc = vc->vc_sw->con_font_copy(vc, con);
3876 release_console_sem();
3880 int con_font_op(struct vc_data *vc, struct console_font_op *op)
3883 case KD_FONT_OP_SET:
3884 return con_font_set(vc, op);
3885 case KD_FONT_OP_GET:
3886 return con_font_get(vc, op);
3887 case KD_FONT_OP_SET_DEFAULT:
3888 return con_font_default(vc, op);
3889 case KD_FONT_OP_COPY:
3890 return con_font_copy(vc, op);
3896 * Interface exported to selection and vcs.
3899 /* used by selection */
3900 u16 screen_glyph(struct vc_data *vc, int offset)
3902 u16 w = scr_readw(screenpos(vc, offset, 1));
3905 if (w & vc->vc_hi_font_mask)
3910 /* used by vcs - note the word offset */
3911 unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed)
3913 return screenpos(vc, 2 * w_offset, viewed);
3916 void getconsxy(struct vc_data *vc, unsigned char *p)
3922 void putconsxy(struct vc_data *vc, unsigned char *p)
3925 gotoxy(vc, p[0], p[1]);
3929 u16 vcs_scr_readw(struct vc_data *vc, const u16 *org)
3931 if ((unsigned long)org == vc->vc_pos && softcursor_original != -1)
3932 return softcursor_original;
3933 return scr_readw(org);
3936 void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org)
3938 scr_writew(val, org);
3939 if ((unsigned long)org == vc->vc_pos) {
3940 softcursor_original = -1;
3946 * Visible symbols for modules
3949 EXPORT_SYMBOL(color_table);
3950 EXPORT_SYMBOL(default_red);
3951 EXPORT_SYMBOL(default_grn);
3952 EXPORT_SYMBOL(default_blu);
3953 EXPORT_SYMBOL(update_region);
3954 EXPORT_SYMBOL(redraw_screen);
3955 EXPORT_SYMBOL(vc_resize);
3956 EXPORT_SYMBOL(vc_lock_resize);
3957 EXPORT_SYMBOL(fg_console);
3958 EXPORT_SYMBOL(console_blank_hook);
3959 EXPORT_SYMBOL(console_blanked);
3960 EXPORT_SYMBOL(vc_cons);
3961 #ifndef VT_SINGLE_DRIVER
3962 EXPORT_SYMBOL(take_over_console);
3963 EXPORT_SYMBOL(give_up_console);