2 * Copyright (C) 1991, 1992 Linus Torvalds
6 * Hopefully this will be a rather complete VT102 implementation.
8 * Beeping thanks to John T Kohl.
10 * Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics
11 * Chars, and VT100 enhancements by Peter MacDonald.
13 * Copy and paste function by Andrew Haylett,
14 * some enhancements by Alessandro Rubini.
16 * Code to check for different video-cards mostly by Galen Hunt,
17 * <g-hunt@ee.utah.edu>
19 * Rudimentary ISO 10646/Unicode/UTF-8 character set support by
20 * Markus Kuhn, <mskuhn@immd4.informatik.uni-erlangen.de>.
22 * Dynamic allocation of consoles, aeb@cwi.nl, May 1994
23 * Resizing of consoles, aeb, 940926
25 * Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94
28 * User-defined bell sound, new setterm control sequences and printk
29 * redirection by Martin Mares <mj@k332.feld.cvut.cz> 19-Nov-95
31 * APM screenblank bug fixed Takashi Manabe <manabe@roy.dsl.tutics.tut.jp>
33 * Merge with the abstract console driver by Geert Uytterhoeven
34 * <geert@linux-m68k.org>, Jan 1997.
36 * Original m68k console driver modifications by
38 * - Arno Griffioen <arno@usn.nl>
39 * - David Carter <carter@cs.bris.ac.uk>
41 * The abstract console driver provides a generic interface for a text
42 * console. It supports VGA text mode, frame buffer based graphical consoles
43 * and special graphics processors that are only accessible through some
44 * registers (e.g. a TMS340x0 GSP).
46 * The interface to the hardware is specified using a special structure
47 * (struct consw) which contains function pointers to console operations
48 * (see <linux/console.h> for more information).
50 * Support for changeable cursor shape
51 * by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997
53 * Ported to i386 and con_scrolldelta fixed
54 * by Emmanuel Marty <core@ggi-project.org>, April 1998
56 * Resurrected character buffers in videoram plus lots of other trickery
57 * by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998
59 * Removed old-style timers, introduced console_timer, made timer
60 * deletion SMP-safe. 17Jun00, Andrew Morton
62 * Removed console_lock, enabled interrupts across all console operations
63 * 13 March 2001, Andrew Morton
65 * Fixed UTF-8 mode so alternate charset modes always work according
66 * to control sequences interpreted in do_con_trol function
67 * preserving backward VT100 semigraphics compatibility,
68 * malformed UTF sequences represented as sequences of replacement glyphs,
69 * original codes or '?' as a last resort if replacement glyph is undefined
70 * by Adam Tla/lka <atlka@pg.gda.pl>, Aug 2006
73 #include <linux/module.h>
74 #include <linux/types.h>
75 #include <linux/sched.h>
76 #include <linux/tty.h>
77 #include <linux/tty_flip.h>
78 #include <linux/kernel.h>
79 #include <linux/string.h>
80 #include <linux/errno.h>
82 #include <linux/slab.h>
83 #include <linux/major.h>
85 #include <linux/console.h>
86 #include <linux/init.h>
87 #include <linux/mutex.h>
88 #include <linux/vt_kern.h>
89 #include <linux/selection.h>
90 #include <linux/tiocl.h>
91 #include <linux/kbd_kern.h>
92 #include <linux/consolemap.h>
93 #include <linux/timer.h>
94 #include <linux/interrupt.h>
95 #include <linux/workqueue.h>
97 #include <linux/font.h>
98 #include <linux/bitops.h>
99 #include <linux/notifier.h>
100 #include <linux/device.h>
101 #include <linux/io.h>
102 #include <linux/uaccess.h>
103 #include <linux/kdb.h>
104 #include <linux/ctype.h>
106 #define MAX_NR_CON_DRIVER 16
108 #define CON_DRIVER_FLAG_MODULE 1
109 #define CON_DRIVER_FLAG_INIT 2
110 #define CON_DRIVER_FLAG_ATTR 4
113 const struct consw *con;
122 static struct con_driver registered_con_driver[MAX_NR_CON_DRIVER];
123 const struct consw *conswitchp;
125 /* A bitmap for codes <32. A bit of 1 indicates that the code
126 * corresponding to that bit number invokes some special action
127 * (such as cursor movement) and should not be displayed as a
128 * glyph unless the disp_ctrl mode is explicitly enabled.
130 #define CTRL_ACTION 0x0d00ff81
131 #define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */
134 * Here is the default bell parameters: 750HZ, 1/8th of a second
136 #define DEFAULT_BELL_PITCH 750
137 #define DEFAULT_BELL_DURATION (HZ/8)
139 struct vc vc_cons [MAX_NR_CONSOLES];
141 #ifndef VT_SINGLE_DRIVER
142 static const struct consw *con_driver_map[MAX_NR_CONSOLES];
145 static int con_open(struct tty_struct *, struct file *);
146 static void vc_init(struct vc_data *vc, unsigned int rows,
147 unsigned int cols, int do_clear);
148 static void gotoxy(struct vc_data *vc, int new_x, int new_y);
149 static void save_cur(struct vc_data *vc);
150 static void reset_terminal(struct vc_data *vc, int do_clear);
151 static void con_flush_chars(struct tty_struct *tty);
152 static int set_vesa_blanking(char __user *p);
153 static void set_cursor(struct vc_data *vc);
154 static void hide_cursor(struct vc_data *vc);
155 static void console_callback(struct work_struct *ignored);
156 static void blank_screen_t(unsigned long dummy);
157 static void set_palette(struct vc_data *vc);
159 static int printable; /* Is console ready for printing? */
160 int default_utf8 = true;
161 module_param(default_utf8, int, S_IRUGO | S_IWUSR);
162 int global_cursor_default = -1;
163 module_param(global_cursor_default, int, S_IRUGO | S_IWUSR);
165 static int cur_default = CUR_DEFAULT;
166 module_param(cur_default, int, S_IRUGO | S_IWUSR);
169 * ignore_poke: don't unblank the screen when things are typed. This is
170 * mainly for the privacy of braille terminal users.
172 static int ignore_poke;
174 int do_poke_blanked_console;
177 static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
178 static int vesa_off_interval;
179 static int blankinterval = 10*60;
180 core_param(consoleblank, blankinterval, int, 0444);
182 static DECLARE_WORK(console_work, console_callback);
185 * fg_console is the current virtual console,
186 * last_console is the last used one,
187 * want_console is the console we want to switch to,
188 * saved_* variants are for save/restore around kernel debugger enter/leave
192 int want_console = -1;
193 static int saved_fg_console;
194 static int saved_last_console;
195 static int saved_want_console;
196 static int saved_vc_mode;
197 static int saved_console_blanked;
200 * For each existing display, we have a pointer to console currently visible
201 * on that display, allowing consoles other than fg_console to be refreshed
202 * appropriately. Unless the low-level driver supplies its own display_fg
203 * variable, we use this one for the "master display".
205 static struct vc_data *master_display_fg;
208 * Unfortunately, we need to delay tty echo when we're currently writing to the
209 * console since the code is (and always was) not re-entrant, so we schedule
210 * all flip requests to process context with schedule-task() and run it from
211 * console_callback().
215 * For the same reason, we defer scrollback to the console callback.
217 static int scrollback_delta;
220 * Hook so that the power management routines can (un)blank
221 * the console on our behalf.
223 int (*console_blank_hook)(int);
225 static DEFINE_TIMER(console_timer, blank_screen_t, 0, 0);
226 static int blank_state;
227 static int blank_timer_expired;
235 * /sys/class/tty/tty0/
237 * the attribute 'active' contains the name of the current vc
238 * console and it supports poll() to detect vc switches
240 static struct device *tty0dev;
243 * Notifier list for console events.
245 static ATOMIC_NOTIFIER_HEAD(vt_notifier_list);
247 int register_vt_notifier(struct notifier_block *nb)
249 return atomic_notifier_chain_register(&vt_notifier_list, nb);
251 EXPORT_SYMBOL_GPL(register_vt_notifier);
253 int unregister_vt_notifier(struct notifier_block *nb)
255 return atomic_notifier_chain_unregister(&vt_notifier_list, nb);
257 EXPORT_SYMBOL_GPL(unregister_vt_notifier);
259 static void notify_write(struct vc_data *vc, unsigned int unicode)
261 struct vt_notifier_param param = { .vc = vc, .c = unicode };
262 atomic_notifier_call_chain(&vt_notifier_list, VT_WRITE, ¶m);
265 static void notify_update(struct vc_data *vc)
267 struct vt_notifier_param param = { .vc = vc };
268 atomic_notifier_call_chain(&vt_notifier_list, VT_UPDATE, ¶m);
271 * Low-Level Functions
274 #define IS_FG(vc) ((vc)->vc_num == fg_console)
276 #ifdef VT_BUF_VRAM_ONLY
277 #define DO_UPDATE(vc) 0
279 #define DO_UPDATE(vc) (CON_IS_VISIBLE(vc) && !console_blanked)
282 static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed)
287 p = (unsigned short *)(vc->vc_origin + offset);
288 else if (!vc->vc_sw->con_screen_pos)
289 p = (unsigned short *)(vc->vc_visible_origin + offset);
291 p = vc->vc_sw->con_screen_pos(vc, offset);
295 /* Called from the keyboard irq path.. */
296 static inline void scrolldelta(int lines)
299 /* scrolldelta needs some kind of consistency lock, but the BKL was
300 and still is not protecting versus the scheduled back end */
301 scrollback_delta += lines;
302 schedule_console_callback();
305 void schedule_console_callback(void)
307 schedule_work(&console_work);
310 static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
312 unsigned short *d, *s;
316 if (b > vc->vc_rows || t >= b || nr < 1)
318 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr))
320 d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
321 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr));
322 scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row);
323 scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_video_erase_char,
324 vc->vc_size_row * nr);
327 static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
334 if (b > vc->vc_rows || t >= b || nr < 1)
336 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr))
338 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
339 step = vc->vc_cols * nr;
340 scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row);
341 scr_memsetw(s, vc->vc_video_erase_char, 2 * step);
344 static void do_update_region(struct vc_data *vc, unsigned long start, int count)
346 #ifndef VT_BUF_VRAM_ONLY
347 unsigned int xx, yy, offset;
351 if (!vc->vc_sw->con_getxy) {
352 offset = (start - vc->vc_origin) / 2;
353 xx = offset % vc->vc_cols;
354 yy = offset / vc->vc_cols;
357 start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy);
361 u16 attrib = scr_readw(p) & 0xff00;
364 while (xx < vc->vc_cols && count) {
365 if (attrib != (scr_readw(p) & 0xff00)) {
367 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
370 attrib = scr_readw(p) & 0xff00;
377 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
382 if (vc->vc_sw->con_getxy) {
384 start = vc->vc_sw->con_getxy(vc, start, NULL, NULL);
390 void update_region(struct vc_data *vc, unsigned long start, int count)
392 WARN_CONSOLE_UNLOCKED();
396 do_update_region(vc, start, count);
401 /* Structure of attributes is hardware-dependent */
403 static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink,
404 u8 _underline, u8 _reverse, u8 _italic)
406 if (vc->vc_sw->con_build_attr)
407 return vc->vc_sw->con_build_attr(vc, _color, _intensity,
408 _blink, _underline, _reverse, _italic);
410 #ifndef VT_BUF_VRAM_ONLY
412 * ++roman: I completely changed the attribute format for monochrome
413 * mode (!can_do_color). The formerly used MDA (monochrome display
414 * adapter) format didn't allow the combination of certain effects.
415 * Now the attribute is just a bit vector:
416 * Bit 0..1: intensity (0..2)
423 if (!vc->vc_can_do_color)
426 (_underline ? 4 : 0) |
430 a = (a & 0xF0) | vc->vc_itcolor;
432 a = (a & 0xf0) | vc->vc_ulcolor;
433 else if (_intensity == 0)
434 a = (a & 0xf0) | vc->vc_ulcolor;
436 a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77);
441 if (vc->vc_hi_font_mask == 0x100)
450 static void update_attr(struct vc_data *vc)
452 vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity,
453 vc->vc_blink, vc->vc_underline,
454 vc->vc_reverse ^ vc->vc_decscnm, vc->vc_italic);
455 vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm, 0) << 8) | ' ';
458 /* Note: inverting the screen twice should revert to the original state */
459 void invert_screen(struct vc_data *vc, int offset, int count, int viewed)
463 WARN_CONSOLE_UNLOCKED();
466 p = screenpos(vc, offset, viewed);
467 if (vc->vc_sw->con_invert_region)
468 vc->vc_sw->con_invert_region(vc, p, count);
469 #ifndef VT_BUF_VRAM_ONLY
475 if (!vc->vc_can_do_color) {
482 } else if (vc->vc_hi_font_mask == 0x100) {
485 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4);
492 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4);
500 do_update_region(vc, (unsigned long) p, count);
503 /* used by selection: complement pointer position */
504 void complement_pos(struct vc_data *vc, int offset)
506 static int old_offset = -1;
507 static unsigned short old;
508 static unsigned short oldx, oldy;
510 WARN_CONSOLE_UNLOCKED();
512 if (old_offset != -1 && old_offset >= 0 &&
513 old_offset < vc->vc_screenbuf_size) {
514 scr_writew(old, screenpos(vc, old_offset, 1));
516 vc->vc_sw->con_putc(vc, old, oldy, oldx);
521 if (offset != -1 && offset >= 0 &&
522 offset < vc->vc_screenbuf_size) {
525 p = screenpos(vc, offset, 1);
527 new = old ^ vc->vc_complement_mask;
530 oldx = (offset >> 1) % vc->vc_cols;
531 oldy = (offset >> 1) / vc->vc_cols;
532 vc->vc_sw->con_putc(vc, new, oldy, oldx);
538 static void insert_char(struct vc_data *vc, unsigned int nr)
540 unsigned short *p = (unsigned short *) vc->vc_pos;
542 scr_memmovew(p + nr, p, (vc->vc_cols - vc->vc_x - nr) * 2);
543 scr_memsetw(p, vc->vc_video_erase_char, nr * 2);
544 vc->vc_need_wrap = 0;
546 do_update_region(vc, (unsigned long) p,
547 vc->vc_cols - vc->vc_x);
550 static void delete_char(struct vc_data *vc, unsigned int nr)
552 unsigned short *p = (unsigned short *) vc->vc_pos;
554 scr_memcpyw(p, p + nr, (vc->vc_cols - vc->vc_x - nr) * 2);
555 scr_memsetw(p + vc->vc_cols - vc->vc_x - nr, vc->vc_video_erase_char,
557 vc->vc_need_wrap = 0;
559 do_update_region(vc, (unsigned long) p,
560 vc->vc_cols - vc->vc_x);
563 static int softcursor_original;
565 static void add_softcursor(struct vc_data *vc)
567 int i = scr_readw((u16 *) vc->vc_pos);
568 u32 type = vc->vc_cursor_type;
570 if (! (type & 0x10)) return;
571 if (softcursor_original != -1) return;
572 softcursor_original = i;
573 i |= ((type >> 8) & 0xff00 );
574 i ^= ((type) & 0xff00 );
575 if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000;
576 if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700;
577 scr_writew(i, (u16 *) vc->vc_pos);
579 vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x);
582 static void hide_softcursor(struct vc_data *vc)
584 if (softcursor_original != -1) {
585 scr_writew(softcursor_original, (u16 *)vc->vc_pos);
587 vc->vc_sw->con_putc(vc, softcursor_original,
589 softcursor_original = -1;
593 static void hide_cursor(struct vc_data *vc)
597 vc->vc_sw->con_cursor(vc, CM_ERASE);
601 static void set_cursor(struct vc_data *vc)
603 if (!IS_FG(vc) || console_blanked ||
604 vc->vc_mode == KD_GRAPHICS)
610 if ((vc->vc_cursor_type & 0x0f) != 1)
611 vc->vc_sw->con_cursor(vc, CM_DRAW);
616 static void set_origin(struct vc_data *vc)
618 WARN_CONSOLE_UNLOCKED();
620 if (!CON_IS_VISIBLE(vc) ||
621 !vc->vc_sw->con_set_origin ||
622 !vc->vc_sw->con_set_origin(vc))
623 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
624 vc->vc_visible_origin = vc->vc_origin;
625 vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size;
626 vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x;
629 static inline void save_screen(struct vc_data *vc)
631 WARN_CONSOLE_UNLOCKED();
633 if (vc->vc_sw->con_save_screen)
634 vc->vc_sw->con_save_screen(vc);
638 * Redrawing of screen
641 void clear_buffer_attributes(struct vc_data *vc)
643 unsigned short *p = (unsigned short *)vc->vc_origin;
644 int count = vc->vc_screenbuf_size / 2;
645 int mask = vc->vc_hi_font_mask | 0xff;
647 for (; count > 0; count--, p++) {
648 scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p);
652 void redraw_screen(struct vc_data *vc, int is_switch)
656 WARN_CONSOLE_UNLOCKED();
660 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
665 struct vc_data *old_vc = vc_cons[fg_console].d;
668 if (!CON_IS_VISIBLE(vc))
670 *vc->vc_display_fg = vc;
671 fg_console = vc->vc_num;
673 if (!CON_IS_VISIBLE(old_vc)) {
678 sysfs_notify(&tty0dev->kobj, NULL, "active");
686 int old_was_color = vc->vc_can_do_color;
689 update = vc->vc_sw->con_switch(vc);
692 * If console changed from mono<->color, the best we can do
693 * is to clear the buffer attributes. As it currently stands,
694 * rebuilding new attributes from the old buffer is not doable
695 * without overly complex code.
697 if (old_was_color != vc->vc_can_do_color) {
699 clear_buffer_attributes(vc);
702 /* Forcibly update if we're panicing */
703 if ((update && vc->vc_mode != KD_GRAPHICS) ||
704 vt_force_oops_output(vc))
705 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
710 compute_shiftstate();
716 * Allocation, freeing and resizing of VTs.
719 int vc_cons_allocated(unsigned int i)
721 return (i < MAX_NR_CONSOLES && vc_cons[i].d);
724 static void visual_init(struct vc_data *vc, int num, int init)
726 /* ++Geert: vc->vc_sw->con_init determines console size */
728 module_put(vc->vc_sw->owner);
729 vc->vc_sw = conswitchp;
730 #ifndef VT_SINGLE_DRIVER
731 if (con_driver_map[num])
732 vc->vc_sw = con_driver_map[num];
734 __module_get(vc->vc_sw->owner);
736 vc->vc_display_fg = &master_display_fg;
737 vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir;
738 vc->vc_uni_pagedir = 0;
739 vc->vc_hi_font_mask = 0;
740 vc->vc_complement_mask = 0;
741 vc->vc_can_do_color = 0;
742 vc->vc_panic_force_write = false;
743 vc->vc_sw->con_init(vc, init);
744 if (!vc->vc_complement_mask)
745 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
746 vc->vc_s_complement_mask = vc->vc_complement_mask;
747 vc->vc_size_row = vc->vc_cols << 1;
748 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
751 int vc_allocate(unsigned int currcons) /* return 0 on success */
753 WARN_CONSOLE_UNLOCKED();
755 if (currcons >= MAX_NR_CONSOLES)
757 if (!vc_cons[currcons].d) {
759 struct vt_notifier_param param;
761 /* prevent users from taking too much memory */
762 if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE))
765 /* due to the granularity of kmalloc, we waste some memory here */
766 /* the alloc is done in two steps, to optimize the common situation
767 of a 25x80 console (structsize=216, screenbuf_size=4000) */
768 /* although the numbers above are not valid since long ago, the
769 point is still up-to-date and the comment still has its value
770 even if only as a historical artifact. --mj, July 1998 */
771 param.vc = vc = kzalloc(sizeof(struct vc_data), GFP_KERNEL);
774 vc_cons[currcons].d = vc;
775 tty_port_init(&vc->port);
776 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
777 visual_init(vc, currcons, 1);
778 if (!*vc->vc_uni_pagedir_loc)
779 con_set_default_unimap(vc);
780 vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL);
781 if (!vc->vc_screenbuf) {
783 vc_cons[currcons].d = NULL;
787 /* If no drivers have overridden us and the user didn't pass a
788 boot option, default to displaying the cursor */
789 if (global_cursor_default == -1)
790 global_cursor_default = 1;
792 vc_init(vc, vc->vc_rows, vc->vc_cols, 1);
793 vcs_make_sysfs(currcons);
794 atomic_notifier_call_chain(&vt_notifier_list, VT_ALLOCATE, ¶m);
799 static inline int resize_screen(struct vc_data *vc, int width, int height,
802 /* Resizes the resolution of the display adapater */
805 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize)
806 err = vc->vc_sw->con_resize(vc, width, height, user);
812 * Change # of rows and columns (0 means unchanged/the size of fg_console)
813 * [this is to be used together with some user program
814 * like resize that changes the hardware videomode]
816 #define VC_RESIZE_MAXCOL (32767)
817 #define VC_RESIZE_MAXROW (32767)
820 * vc_do_resize - resizing method for the tty
821 * @tty: tty being resized
822 * @real_tty: real tty (different to tty if a pty/tty pair)
823 * @vc: virtual console private data
827 * Resize a virtual console, clipping according to the actual constraints.
828 * If the caller passes a tty structure then update the termios winsize
829 * information and perform any necessary signal handling.
831 * Caller must hold the console semaphore. Takes the termios rwsem and
832 * ctrl_lock of the tty IFF a tty is passed.
835 static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc,
836 unsigned int cols, unsigned int lines)
838 unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0;
840 unsigned int old_rows, old_row_size;
841 unsigned int new_cols, new_rows, new_row_size, new_screen_size;
843 unsigned short *newscreen;
845 WARN_CONSOLE_UNLOCKED();
850 user = vc->vc_resize_user;
851 vc->vc_resize_user = 0;
853 if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW)
856 new_cols = (cols ? cols : vc->vc_cols);
857 new_rows = (lines ? lines : vc->vc_rows);
858 new_row_size = new_cols << 1;
859 new_screen_size = new_row_size * new_rows;
861 if (new_cols == vc->vc_cols && new_rows == vc->vc_rows)
864 newscreen = kmalloc(new_screen_size, GFP_USER);
868 old_rows = vc->vc_rows;
869 old_row_size = vc->vc_size_row;
871 err = resize_screen(vc, new_cols, new_rows, user);
877 vc->vc_rows = new_rows;
878 vc->vc_cols = new_cols;
879 vc->vc_size_row = new_row_size;
880 vc->vc_screenbuf_size = new_screen_size;
882 rlth = min(old_row_size, new_row_size);
883 rrem = new_row_size - rlth;
884 old_origin = vc->vc_origin;
885 new_origin = (long) newscreen;
886 new_scr_end = new_origin + new_screen_size;
888 if (vc->vc_y > new_rows) {
889 if (old_rows - vc->vc_y < new_rows) {
891 * Cursor near the bottom, copy contents from the
894 old_origin += (old_rows - new_rows) * old_row_size;
897 * Cursor is in no man's land, copy 1/2 screenful
898 * from the top and bottom of cursor position
900 old_origin += (vc->vc_y - new_rows/2) * old_row_size;
904 end = old_origin + old_row_size * min(old_rows, new_rows);
908 while (old_origin < end) {
909 scr_memcpyw((unsigned short *) new_origin,
910 (unsigned short *) old_origin, rlth);
912 scr_memsetw((void *)(new_origin + rlth),
913 vc->vc_video_erase_char, rrem);
914 old_origin += old_row_size;
915 new_origin += new_row_size;
917 if (new_scr_end > new_origin)
918 scr_memsetw((void *)new_origin, vc->vc_video_erase_char,
919 new_scr_end - new_origin);
920 kfree(vc->vc_screenbuf);
921 vc->vc_screenbuf = newscreen;
922 vc->vc_screenbuf_size = new_screen_size;
925 /* do part of a reset_terminal() */
927 vc->vc_bottom = vc->vc_rows;
928 gotoxy(vc, vc->vc_x, vc->vc_y);
932 /* Rewrite the requested winsize data with the actual
935 memset(&ws, 0, sizeof(ws));
936 ws.ws_row = vc->vc_rows;
937 ws.ws_col = vc->vc_cols;
938 ws.ws_ypixel = vc->vc_scan_lines;
939 tty_do_resize(tty, &ws);
942 if (CON_IS_VISIBLE(vc))
944 vt_event_post(VT_EVENT_RESIZE, vc->vc_num, vc->vc_num);
949 * vc_resize - resize a VT
950 * @vc: virtual console
954 * Resize a virtual console as seen from the console end of things. We
955 * use the common vc_do_resize methods to update the structures. The
956 * caller must hold the console sem to protect console internals and
960 int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int rows)
962 return vc_do_resize(vc->port.tty, vc, cols, rows);
966 * vt_resize - resize a VT
967 * @tty: tty to resize
968 * @ws: winsize attributes
970 * Resize a virtual terminal. This is called by the tty layer as we
971 * register our own handler for resizing. The mutual helper does all
974 * Takes the console sem and the called methods then take the tty
975 * termios_rwsem and the tty ctrl_lock in that order.
977 static int vt_resize(struct tty_struct *tty, struct winsize *ws)
979 struct vc_data *vc = tty->driver_data;
983 ret = vc_do_resize(tty, vc, ws->ws_col, ws->ws_row);
988 struct vc_data *vc_deallocate(unsigned int currcons)
990 struct vc_data *vc = NULL;
992 WARN_CONSOLE_UNLOCKED();
994 if (vc_cons_allocated(currcons)) {
995 struct vt_notifier_param param;
997 param.vc = vc = vc_cons[currcons].d;
998 atomic_notifier_call_chain(&vt_notifier_list, VT_DEALLOCATE, ¶m);
999 vcs_remove_sysfs(currcons);
1000 vc->vc_sw->con_deinit(vc);
1001 put_pid(vc->vt_pid);
1002 module_put(vc->vc_sw->owner);
1003 kfree(vc->vc_screenbuf);
1004 vc_cons[currcons].d = NULL;
1013 #define set_kbd(vc, x) vt_set_kbd_mode_bit((vc)->vc_num, (x))
1014 #define clr_kbd(vc, x) vt_clr_kbd_mode_bit((vc)->vc_num, (x))
1015 #define is_kbd(vc, x) vt_get_kbd_mode_bit((vc)->vc_num, (x))
1017 #define decarm VC_REPEAT
1018 #define decckm VC_CKMODE
1019 #define kbdapplic VC_APPLIC
1023 * this is what the terminal answers to a ESC-Z or csi0c query.
1025 #define VT100ID "\033[?1;2c"
1026 #define VT102ID "\033[?6c"
1028 unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7,
1029 8,12,10,14, 9,13,11,15 };
1031 /* the default colour table, for VGA+ colour systems */
1032 int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
1033 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
1034 int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
1035 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
1036 int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
1037 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
1039 module_param_array(default_red, int, NULL, S_IRUGO | S_IWUSR);
1040 module_param_array(default_grn, int, NULL, S_IRUGO | S_IWUSR);
1041 module_param_array(default_blu, int, NULL, S_IRUGO | S_IWUSR);
1044 * gotoxy() must verify all boundaries, because the arguments
1045 * might also be negative. If the given position is out of
1046 * bounds, the cursor is placed at the nearest margin.
1048 static void gotoxy(struct vc_data *vc, int new_x, int new_y)
1055 if (new_x >= vc->vc_cols)
1056 vc->vc_x = vc->vc_cols - 1;
1063 max_y = vc->vc_bottom;
1066 max_y = vc->vc_rows;
1070 else if (new_y >= max_y)
1071 vc->vc_y = max_y - 1;
1074 vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1);
1075 vc->vc_need_wrap = 0;
1078 /* for absolute user moves, when decom is set */
1079 static void gotoxay(struct vc_data *vc, int new_x, int new_y)
1081 gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y);
1084 void scrollback(struct vc_data *vc, int lines)
1087 lines = vc->vc_rows / 2;
1088 scrolldelta(-lines);
1091 void scrollfront(struct vc_data *vc, int lines)
1094 lines = vc->vc_rows / 2;
1098 static void lf(struct vc_data *vc)
1100 /* don't scroll if above bottom of scrolling region, or
1101 * if below scrolling region
1103 if (vc->vc_y + 1 == vc->vc_bottom)
1104 scrup(vc, vc->vc_top, vc->vc_bottom, 1);
1105 else if (vc->vc_y < vc->vc_rows - 1) {
1107 vc->vc_pos += vc->vc_size_row;
1109 vc->vc_need_wrap = 0;
1110 notify_write(vc, '\n');
1113 static void ri(struct vc_data *vc)
1115 /* don't scroll if below top of scrolling region, or
1116 * if above scrolling region
1118 if (vc->vc_y == vc->vc_top)
1119 scrdown(vc, vc->vc_top, vc->vc_bottom, 1);
1120 else if (vc->vc_y > 0) {
1122 vc->vc_pos -= vc->vc_size_row;
1124 vc->vc_need_wrap = 0;
1127 static inline void cr(struct vc_data *vc)
1129 vc->vc_pos -= vc->vc_x << 1;
1130 vc->vc_need_wrap = vc->vc_x = 0;
1131 notify_write(vc, '\r');
1134 static inline void bs(struct vc_data *vc)
1139 vc->vc_need_wrap = 0;
1140 notify_write(vc, '\b');
1144 static inline void del(struct vc_data *vc)
1149 static void csi_J(struct vc_data *vc, int vpar)
1152 unsigned short * start;
1155 case 0: /* erase from cursor to end of display */
1156 count = (vc->vc_scr_end - vc->vc_pos) >> 1;
1157 start = (unsigned short *)vc->vc_pos;
1159 case 1: /* erase from start to cursor */
1160 count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1;
1161 start = (unsigned short *)vc->vc_origin;
1163 case 3: /* erase scroll-back buffer (and whole display) */
1164 scr_memsetw(vc->vc_screenbuf, vc->vc_video_erase_char,
1165 vc->vc_screenbuf_size >> 1);
1168 case 2: /* erase whole display */
1169 count = vc->vc_cols * vc->vc_rows;
1170 start = (unsigned short *)vc->vc_origin;
1175 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1177 do_update_region(vc, (unsigned long) start, count);
1178 vc->vc_need_wrap = 0;
1181 static void csi_K(struct vc_data *vc, int vpar)
1184 unsigned short * start;
1187 case 0: /* erase from cursor to end of line */
1188 count = vc->vc_cols - vc->vc_x;
1189 start = (unsigned short *)vc->vc_pos;
1191 case 1: /* erase from start of line to cursor */
1192 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1193 count = vc->vc_x + 1;
1195 case 2: /* erase whole line */
1196 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1197 count = vc->vc_cols;
1202 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1203 vc->vc_need_wrap = 0;
1205 do_update_region(vc, (unsigned long) start, count);
1208 static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */
1214 count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar;
1216 scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count);
1218 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count);
1219 vc->vc_need_wrap = 0;
1222 static void default_attr(struct vc_data *vc)
1224 vc->vc_intensity = 1;
1226 vc->vc_underline = 0;
1229 vc->vc_color = vc->vc_def_color;
1232 /* console_lock is held */
1233 static void csi_m(struct vc_data *vc)
1237 for (i = 0; i <= vc->vc_npar; i++)
1238 switch (vc->vc_par[i]) {
1239 case 0: /* all attributes off */
1243 vc->vc_intensity = 2;
1246 vc->vc_intensity = 0;
1252 vc->vc_underline = 1;
1260 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1261 * Select primary font, don't display
1262 * control chars if defined, don't set
1265 vc->vc_translate = set_translate(vc->vc_charset == 0
1267 : vc->vc_G1_charset, vc);
1268 vc->vc_disp_ctrl = 0;
1269 vc->vc_toggle_meta = 0;
1271 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1272 * Select first alternate font, lets
1273 * chars < 32 be displayed as ROM chars.
1275 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1276 vc->vc_disp_ctrl = 1;
1277 vc->vc_toggle_meta = 0;
1279 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1280 * Select second alternate font, toggle
1281 * high bit before displaying as ROM char.
1283 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1284 vc->vc_disp_ctrl = 1;
1285 vc->vc_toggle_meta = 1;
1289 vc->vc_intensity = 1;
1295 vc->vc_underline = 0;
1303 case 38: /* ANSI X3.64-1979 (SCO-ish?)
1304 * Enables underscore, white foreground
1305 * with white underscore (Linux - use
1306 * default foreground).
1308 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1309 vc->vc_underline = 1;
1311 case 39: /* ANSI X3.64-1979 (SCO-ish?)
1312 * Disable underline option.
1313 * Reset colour to default? It did this
1316 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1317 vc->vc_underline = 0;
1320 vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f);
1323 if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37)
1324 vc->vc_color = color_table[vc->vc_par[i] - 30]
1325 | (vc->vc_color & 0xf0);
1326 else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47)
1327 vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4)
1328 | (vc->vc_color & 0x0f);
1334 static void respond_string(const char *p, struct tty_port *port)
1337 tty_insert_flip_char(port, *p, 0);
1340 tty_schedule_flip(port);
1343 static void cursor_report(struct vc_data *vc, struct tty_struct *tty)
1347 sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1);
1348 respond_string(buf, tty->port);
1351 static inline void status_report(struct tty_struct *tty)
1353 respond_string("\033[0n", tty->port); /* Terminal ok */
1356 static inline void respond_ID(struct tty_struct *tty)
1358 respond_string(VT102ID, tty->port);
1361 void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry)
1365 sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx),
1367 respond_string(buf, tty->port);
1370 /* invoked via ioctl(TIOCLINUX) and through set_selection */
1371 int mouse_reporting(void)
1373 return vc_cons[fg_console].d->vc_report_mouse;
1376 /* console_lock is held */
1377 static void set_mode(struct vc_data *vc, int on_off)
1381 for (i = 0; i <= vc->vc_npar; i++)
1383 switch(vc->vc_par[i]) { /* DEC private modes set/reset */
1384 case 1: /* Cursor keys send ^[Ox/^[[x */
1386 set_kbd(vc, decckm);
1388 clr_kbd(vc, decckm);
1390 case 3: /* 80/132 mode switch unimplemented */
1391 vc->vc_deccolm = on_off;
1393 vc_resize(deccolm ? 132 : 80, vc->vc_rows);
1394 /* this alone does not suffice; some user mode
1395 utility has to change the hardware regs */
1398 case 5: /* Inverted screen on/off */
1399 if (vc->vc_decscnm != on_off) {
1400 vc->vc_decscnm = on_off;
1401 invert_screen(vc, 0, vc->vc_screenbuf_size, 0);
1405 case 6: /* Origin relative/absolute */
1406 vc->vc_decom = on_off;
1409 case 7: /* Autowrap on/off */
1410 vc->vc_decawm = on_off;
1412 case 8: /* Autorepeat on/off */
1414 set_kbd(vc, decarm);
1416 clr_kbd(vc, decarm);
1419 vc->vc_report_mouse = on_off ? 1 : 0;
1421 case 25: /* Cursor on/off */
1422 vc->vc_deccm = on_off;
1425 vc->vc_report_mouse = on_off ? 2 : 0;
1429 switch(vc->vc_par[i]) { /* ANSI modes set/reset */
1430 case 3: /* Monitor (display ctrls) */
1431 vc->vc_disp_ctrl = on_off;
1433 case 4: /* Insert Mode on/off */
1434 vc->vc_decim = on_off;
1436 case 20: /* Lf, Enter == CrLf/Lf */
1446 /* console_lock is held */
1447 static void setterm_command(struct vc_data *vc)
1449 switch(vc->vc_par[0]) {
1450 case 1: /* set color for underline mode */
1451 if (vc->vc_can_do_color &&
1452 vc->vc_par[1] < 16) {
1453 vc->vc_ulcolor = color_table[vc->vc_par[1]];
1454 if (vc->vc_underline)
1458 case 2: /* set color for half intensity mode */
1459 if (vc->vc_can_do_color &&
1460 vc->vc_par[1] < 16) {
1461 vc->vc_halfcolor = color_table[vc->vc_par[1]];
1462 if (vc->vc_intensity == 0)
1466 case 8: /* store colors as defaults */
1467 vc->vc_def_color = vc->vc_attr;
1468 if (vc->vc_hi_font_mask == 0x100)
1469 vc->vc_def_color >>= 1;
1473 case 9: /* set blanking interval */
1474 blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60;
1475 poke_blanked_console();
1477 case 10: /* set bell frequency in Hz */
1478 if (vc->vc_npar >= 1)
1479 vc->vc_bell_pitch = vc->vc_par[1];
1481 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1483 case 11: /* set bell duration in msec */
1484 if (vc->vc_npar >= 1)
1485 vc->vc_bell_duration = (vc->vc_par[1] < 2000) ?
1486 vc->vc_par[1] * HZ / 1000 : 0;
1488 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1490 case 12: /* bring specified console to the front */
1491 if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1))
1492 set_console(vc->vc_par[1] - 1);
1494 case 13: /* unblank the screen */
1495 poke_blanked_console();
1497 case 14: /* set vesa powerdown interval */
1498 vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1500 case 15: /* activate the previous console */
1501 set_console(last_console);
1506 /* console_lock is held */
1507 static void csi_at(struct vc_data *vc, unsigned int nr)
1509 if (nr > vc->vc_cols - vc->vc_x)
1510 nr = vc->vc_cols - vc->vc_x;
1513 insert_char(vc, nr);
1516 /* console_lock is held */
1517 static void csi_L(struct vc_data *vc, unsigned int nr)
1519 if (nr > vc->vc_rows - vc->vc_y)
1520 nr = vc->vc_rows - vc->vc_y;
1523 scrdown(vc, vc->vc_y, vc->vc_bottom, nr);
1524 vc->vc_need_wrap = 0;
1527 /* console_lock is held */
1528 static void csi_P(struct vc_data *vc, unsigned int nr)
1530 if (nr > vc->vc_cols - vc->vc_x)
1531 nr = vc->vc_cols - vc->vc_x;
1534 delete_char(vc, nr);
1537 /* console_lock is held */
1538 static void csi_M(struct vc_data *vc, unsigned int nr)
1540 if (nr > vc->vc_rows - vc->vc_y)
1541 nr = vc->vc_rows - vc->vc_y;
1544 scrup(vc, vc->vc_y, vc->vc_bottom, nr);
1545 vc->vc_need_wrap = 0;
1548 /* console_lock is held (except via vc_init->reset_terminal */
1549 static void save_cur(struct vc_data *vc)
1551 vc->vc_saved_x = vc->vc_x;
1552 vc->vc_saved_y = vc->vc_y;
1553 vc->vc_s_intensity = vc->vc_intensity;
1554 vc->vc_s_italic = vc->vc_italic;
1555 vc->vc_s_underline = vc->vc_underline;
1556 vc->vc_s_blink = vc->vc_blink;
1557 vc->vc_s_reverse = vc->vc_reverse;
1558 vc->vc_s_charset = vc->vc_charset;
1559 vc->vc_s_color = vc->vc_color;
1560 vc->vc_saved_G0 = vc->vc_G0_charset;
1561 vc->vc_saved_G1 = vc->vc_G1_charset;
1564 /* console_lock is held */
1565 static void restore_cur(struct vc_data *vc)
1567 gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y);
1568 vc->vc_intensity = vc->vc_s_intensity;
1569 vc->vc_italic = vc->vc_s_italic;
1570 vc->vc_underline = vc->vc_s_underline;
1571 vc->vc_blink = vc->vc_s_blink;
1572 vc->vc_reverse = vc->vc_s_reverse;
1573 vc->vc_charset = vc->vc_s_charset;
1574 vc->vc_color = vc->vc_s_color;
1575 vc->vc_G0_charset = vc->vc_saved_G0;
1576 vc->vc_G1_charset = vc->vc_saved_G1;
1577 vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc);
1579 vc->vc_need_wrap = 0;
1582 enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey,
1583 EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd,
1586 /* console_lock is held (except via vc_init()) */
1587 static void reset_terminal(struct vc_data *vc, int do_clear)
1590 vc->vc_bottom = vc->vc_rows;
1591 vc->vc_state = ESnormal;
1593 vc->vc_translate = set_translate(LAT1_MAP, vc);
1594 vc->vc_G0_charset = LAT1_MAP;
1595 vc->vc_G1_charset = GRAF_MAP;
1597 vc->vc_need_wrap = 0;
1598 vc->vc_report_mouse = 0;
1599 vc->vc_utf = default_utf8;
1600 vc->vc_utf_count = 0;
1602 vc->vc_disp_ctrl = 0;
1603 vc->vc_toggle_meta = 0;
1608 vc->vc_deccm = global_cursor_default;
1611 vt_reset_keyboard(vc->vc_num);
1613 vc->vc_cursor_type = cur_default;
1614 vc->vc_complement_mask = vc->vc_s_complement_mask;
1619 vc->vc_tab_stop[0] = 0x01010100;
1620 vc->vc_tab_stop[1] =
1621 vc->vc_tab_stop[2] =
1622 vc->vc_tab_stop[3] =
1623 vc->vc_tab_stop[4] =
1624 vc->vc_tab_stop[5] =
1625 vc->vc_tab_stop[6] =
1626 vc->vc_tab_stop[7] = 0x01010101;
1628 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1629 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1637 /* console_lock is held */
1638 static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
1641 * Control characters can be used in the _middle_
1642 * of an escape sequence.
1648 if (vc->vc_bell_duration)
1649 kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration);
1655 vc->vc_pos -= (vc->vc_x << 1);
1656 while (vc->vc_x < vc->vc_cols - 1) {
1658 if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31)))
1661 vc->vc_pos += (vc->vc_x << 1);
1662 notify_write(vc, '\t');
1664 case 10: case 11: case 12:
1666 if (!is_kbd(vc, lnm))
1673 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1674 vc->vc_disp_ctrl = 1;
1678 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1679 vc->vc_disp_ctrl = 0;
1682 vc->vc_state = ESnormal;
1685 vc->vc_state = ESesc;
1691 vc->vc_state = ESsquare;
1694 switch(vc->vc_state) {
1696 vc->vc_state = ESnormal;
1699 vc->vc_state = ESsquare;
1702 vc->vc_state = ESnonstd;
1705 vc->vc_state = ESpercent;
1718 vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31));
1730 vc->vc_state = ESsetG0;
1733 vc->vc_state = ESsetG1;
1736 vc->vc_state = EShash;
1739 reset_terminal(vc, 1);
1741 case '>': /* Numeric keypad */
1742 clr_kbd(vc, kbdapplic);
1744 case '=': /* Appl. keypad */
1745 set_kbd(vc, kbdapplic);
1750 if (c=='P') { /* palette escape sequence */
1751 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1752 vc->vc_par[vc->vc_npar] = 0;
1754 vc->vc_state = ESpalette;
1756 } else if (c=='R') { /* reset palette */
1758 vc->vc_state = ESnormal;
1760 vc->vc_state = ESnormal;
1764 vc->vc_par[vc->vc_npar++] = hex_to_bin(c);
1765 if (vc->vc_npar == 7) {
1766 int i = vc->vc_par[0] * 3, j = 1;
1767 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1768 vc->vc_palette[i++] += vc->vc_par[j++];
1769 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1770 vc->vc_palette[i++] += vc->vc_par[j++];
1771 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1772 vc->vc_palette[i] += vc->vc_par[j];
1774 vc->vc_state = ESnormal;
1777 vc->vc_state = ESnormal;
1780 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1781 vc->vc_par[vc->vc_npar] = 0;
1783 vc->vc_state = ESgetpars;
1784 if (c == '[') { /* Function key */
1785 vc->vc_state=ESfunckey;
1788 vc->vc_ques = (c == '?');
1792 if (c == ';' && vc->vc_npar < NPAR - 1) {
1795 } else if (c>='0' && c<='9') {
1796 vc->vc_par[vc->vc_npar] *= 10;
1797 vc->vc_par[vc->vc_npar] += c - '0';
1800 vc->vc_state = ESgotpars;
1802 vc->vc_state = ESnormal;
1813 vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16);
1815 vc->vc_cursor_type = cur_default;
1823 vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1];
1825 vc->vc_complement_mask = vc->vc_s_complement_mask;
1831 if (vc->vc_par[0] == 5)
1833 else if (vc->vc_par[0] == 6)
1834 cursor_report(vc, tty);
1846 gotoxy(vc, vc->vc_par[0], vc->vc_y);
1851 gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]);
1856 gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]);
1861 gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y);
1866 gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y);
1871 gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]);
1876 gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]);
1881 gotoxay(vc, vc->vc_x ,vc->vc_par[0]);
1888 gotoxay(vc, vc->vc_par[1], vc->vc_par[0]);
1891 csi_J(vc, vc->vc_par[0]);
1894 csi_K(vc, vc->vc_par[0]);
1897 csi_L(vc, vc->vc_par[0]);
1900 csi_M(vc, vc->vc_par[0]);
1903 csi_P(vc, vc->vc_par[0]);
1911 vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31));
1912 else if (vc->vc_par[0] == 3) {
1913 vc->vc_tab_stop[0] =
1914 vc->vc_tab_stop[1] =
1915 vc->vc_tab_stop[2] =
1916 vc->vc_tab_stop[3] =
1917 vc->vc_tab_stop[4] =
1918 vc->vc_tab_stop[5] =
1919 vc->vc_tab_stop[6] =
1920 vc->vc_tab_stop[7] = 0;
1926 case 'q': /* DECLL - but only 3 leds */
1927 /* map 0,1,2,3 to 0,1,2,4 */
1928 if (vc->vc_par[0] < 4)
1929 vt_set_led_state(vc->vc_num,
1930 (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4);
1936 vc->vc_par[1] = vc->vc_rows;
1937 /* Minimum allowed region is 2 lines */
1938 if (vc->vc_par[0] < vc->vc_par[1] &&
1939 vc->vc_par[1] <= vc->vc_rows) {
1940 vc->vc_top = vc->vc_par[0] - 1;
1941 vc->vc_bottom = vc->vc_par[1];
1952 csi_X(vc, vc->vc_par[0]);
1955 csi_at(vc, vc->vc_par[0]);
1957 case ']': /* setterm functions */
1958 setterm_command(vc);
1963 vc->vc_state = ESnormal;
1965 case '@': /* defined in ISO 2022 */
1968 case 'G': /* prelim official escape code */
1969 case '8': /* retained for compatibility */
1975 vc->vc_state = ESnormal;
1978 vc->vc_state = ESnormal;
1980 /* DEC screen alignment test. kludge :-) */
1981 vc->vc_video_erase_char =
1982 (vc->vc_video_erase_char & 0xff00) | 'E';
1984 vc->vc_video_erase_char =
1985 (vc->vc_video_erase_char & 0xff00) | ' ';
1986 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
1991 vc->vc_G0_charset = GRAF_MAP;
1993 vc->vc_G0_charset = LAT1_MAP;
1995 vc->vc_G0_charset = IBMPC_MAP;
1997 vc->vc_G0_charset = USER_MAP;
1998 if (vc->vc_charset == 0)
1999 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
2000 vc->vc_state = ESnormal;
2004 vc->vc_G1_charset = GRAF_MAP;
2006 vc->vc_G1_charset = LAT1_MAP;
2008 vc->vc_G1_charset = IBMPC_MAP;
2010 vc->vc_G1_charset = USER_MAP;
2011 if (vc->vc_charset == 1)
2012 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
2013 vc->vc_state = ESnormal;
2016 vc->vc_state = ESnormal;
2020 /* is_double_width() is based on the wcwidth() implementation by
2021 * Markus Kuhn -- 2007-05-26 (Unicode 5.0)
2022 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
2029 static int bisearch(uint32_t ucs, const struct interval *table, int max)
2034 if (ucs < table[0].first || ucs > table[max].last)
2036 while (max >= min) {
2037 mid = (min + max) / 2;
2038 if (ucs > table[mid].last)
2040 else if (ucs < table[mid].first)
2048 static int is_double_width(uint32_t ucs)
2050 static const struct interval double_width[] = {
2051 { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E },
2052 { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF },
2053 { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 },
2054 { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD }
2056 return bisearch(ucs, double_width, ARRAY_SIZE(double_width) - 1);
2059 /* acquires console_lock */
2060 static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2062 #ifdef VT_BUF_VRAM_ONLY
2063 #define FLUSH do { } while(0);
2065 #define FLUSH if (draw_x >= 0) { \
2066 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
2071 int c, tc, ok, n = 0, draw_x = -1;
2072 unsigned int currcons;
2073 unsigned long draw_from = 0, draw_to = 0;
2075 unsigned char vc_attr;
2076 struct vt_notifier_param param;
2080 u16 himask, charmask;
2088 vc = tty->driver_data;
2090 printk(KERN_ERR "vt: argh, driver_data is NULL !\n");
2095 currcons = vc->vc_num;
2096 if (!vc_cons_allocated(currcons)) {
2097 /* could this happen? */
2098 pr_warn_once("con_write: tty %d not allocated\n", currcons+1);
2103 himask = vc->vc_hi_font_mask;
2104 charmask = himask ? 0x1ff : 0xff;
2106 /* undraw cursor first */
2112 while (!tty->stopped && count) {
2122 /* Do no translation at all in control states */
2123 if (vc->vc_state != ESnormal) {
2125 } else if (vc->vc_utf && !vc->vc_disp_ctrl) {
2126 /* Combine UTF-8 into Unicode in vc_utf_char.
2127 * vc_utf_count is the number of continuation bytes still
2128 * expected to arrive.
2129 * vc_npar is the number of continuation bytes arrived so
2133 if ((c & 0xc0) == 0x80) {
2134 /* Continuation byte received */
2135 static const uint32_t utf8_length_changes[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff };
2136 if (vc->vc_utf_count) {
2137 vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f);
2139 if (--vc->vc_utf_count) {
2140 /* Still need some bytes */
2143 /* Got a whole character */
2144 c = vc->vc_utf_char;
2145 /* Reject overlong sequences */
2146 if (c <= utf8_length_changes[vc->vc_npar - 1] ||
2147 c > utf8_length_changes[vc->vc_npar])
2150 /* Unexpected continuation byte */
2151 vc->vc_utf_count = 0;
2155 /* Single ASCII byte or first byte of a sequence received */
2156 if (vc->vc_utf_count) {
2157 /* Continuation byte expected */
2159 vc->vc_utf_count = 0;
2161 } else if (c > 0x7f) {
2162 /* First byte of a multibyte sequence received */
2164 if ((c & 0xe0) == 0xc0) {
2165 vc->vc_utf_count = 1;
2166 vc->vc_utf_char = (c & 0x1f);
2167 } else if ((c & 0xf0) == 0xe0) {
2168 vc->vc_utf_count = 2;
2169 vc->vc_utf_char = (c & 0x0f);
2170 } else if ((c & 0xf8) == 0xf0) {
2171 vc->vc_utf_count = 3;
2172 vc->vc_utf_char = (c & 0x07);
2173 } else if ((c & 0xfc) == 0xf8) {
2174 vc->vc_utf_count = 4;
2175 vc->vc_utf_char = (c & 0x03);
2176 } else if ((c & 0xfe) == 0xfc) {
2177 vc->vc_utf_count = 5;
2178 vc->vc_utf_char = (c & 0x01);
2180 /* 254 and 255 are invalid */
2183 if (vc->vc_utf_count) {
2184 /* Still need some bytes */
2188 /* Nothing to do if an ASCII byte was received */
2190 /* End of UTF-8 decoding. */
2191 /* c is the received character, or U+FFFD for invalid sequences. */
2192 /* Replace invalid Unicode code points with U+FFFD too */
2193 if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff)
2196 } else { /* no utf or alternate charset mode */
2197 tc = vc_translate(vc, c);
2201 if (atomic_notifier_call_chain(&vt_notifier_list, VT_PREWRITE,
2202 ¶m) == NOTIFY_STOP)
2205 /* If the original code was a control character we
2206 * only allow a glyph to be displayed if the code is
2207 * not normally used (such as for cursor movement) or
2208 * if the disp_ctrl mode has been explicitly enabled.
2209 * Certain characters (as given by the CTRL_ALWAYS
2210 * bitmap) are always displayed as control characters,
2211 * as the console would be pretty useless without
2212 * them; to display an arbitrary font position use the
2213 * direct-to-font zone in UTF-8 mode.
2215 ok = tc && (c >= 32 ||
2216 !(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 :
2217 vc->vc_utf || ((CTRL_ACTION >> c) & 1)))
2218 && (c != 127 || vc->vc_disp_ctrl)
2221 if (vc->vc_state == ESnormal && ok) {
2222 if (vc->vc_utf && !vc->vc_disp_ctrl) {
2223 if (is_double_width(c))
2226 /* Now try to find out how to display it */
2227 tc = conv_uni_to_pc(vc, tc);
2228 if (tc & ~charmask) {
2229 if (tc == -1 || tc == -2) {
2230 continue; /* nothing to display */
2232 /* Glyph not found */
2233 if ((!(vc->vc_utf && !vc->vc_disp_ctrl) || c < 128) && !(c & ~charmask)) {
2234 /* In legacy mode use the glyph we get by a 1:1 mapping.
2235 This would make absolutely no sense with Unicode in mind,
2236 but do this for ASCII characters since a font may lack
2237 Unicode mapping info and we don't want to end up with
2238 having question marks only. */
2241 /* Display U+FFFD. If it's not found, display an inverse question mark. */
2242 tc = conv_uni_to_pc(vc, 0xfffd);
2245 tc = conv_uni_to_pc(vc, '?');
2246 if (tc < 0) tc = '?';
2252 vc_attr = vc->vc_attr;
2254 /* invert vc_attr */
2255 if (!vc->vc_can_do_color) {
2256 vc_attr = (vc->vc_attr) ^ 0x08;
2257 } else if (vc->vc_hi_font_mask == 0x100) {
2258 vc_attr = ((vc->vc_attr) & 0x11) | (((vc->vc_attr) & 0xe0) >> 4) | (((vc->vc_attr) & 0x0e) << 4);
2260 vc_attr = ((vc->vc_attr) & 0x88) | (((vc->vc_attr) & 0x70) >> 4) | (((vc->vc_attr) & 0x07) << 4);
2266 if (vc->vc_need_wrap || vc->vc_decim)
2268 if (vc->vc_need_wrap) {
2275 ((vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) :
2276 (vc_attr << 8) + tc,
2277 (u16 *) vc->vc_pos);
2278 if (DO_UPDATE(vc) && draw_x < 0) {
2280 draw_from = vc->vc_pos;
2282 if (vc->vc_x == vc->vc_cols - 1) {
2283 vc->vc_need_wrap = vc->vc_decawm;
2284 draw_to = vc->vc_pos + 2;
2287 draw_to = (vc->vc_pos += 2);
2290 if (!--width) break;
2292 tc = conv_uni_to_pc(vc, ' '); /* A space is printed in the second column */
2293 if (tc < 0) tc = ' ';
2295 notify_write(vc, c);
2306 goto rescan_last_byte;
2311 do_con_trol(tty, vc, orig);
2314 console_conditional_schedule();
2322 * This is the console switching callback.
2324 * Doing console switching in a process context allows
2325 * us to do the switches asynchronously (needed when we want
2326 * to switch due to a keyboard interrupt). Synchronization
2327 * with other console code and prevention of re-entrancy is
2328 * ensured with console_lock.
2330 static void console_callback(struct work_struct *ignored)
2334 if (want_console >= 0) {
2335 if (want_console != fg_console &&
2336 vc_cons_allocated(want_console)) {
2337 hide_cursor(vc_cons[fg_console].d);
2338 change_console(vc_cons[want_console].d);
2339 /* we only changed when the console had already
2340 been allocated - a new console is not created
2341 in an interrupt routine */
2345 if (do_poke_blanked_console) { /* do not unblank for a LED change */
2346 do_poke_blanked_console = 0;
2347 poke_blanked_console();
2349 if (scrollback_delta) {
2350 struct vc_data *vc = vc_cons[fg_console].d;
2352 if (vc->vc_mode == KD_TEXT)
2353 vc->vc_sw->con_scrolldelta(vc, scrollback_delta);
2354 scrollback_delta = 0;
2356 if (blank_timer_expired) {
2358 blank_timer_expired = 0;
2360 notify_update(vc_cons[fg_console].d);
2365 int set_console(int nr)
2367 struct vc_data *vc = vc_cons[fg_console].d;
2369 if (!vc_cons_allocated(nr) || vt_dont_switch ||
2370 (vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) {
2373 * Console switch will fail in console_callback() or
2374 * change_console() so there is no point scheduling
2377 * Existing set_console() users don't check the return
2378 * value so this shouldn't break anything
2384 schedule_console_callback();
2389 struct tty_driver *console_driver;
2391 #ifdef CONFIG_VT_CONSOLE
2394 * vt_kmsg_redirect() - Sets/gets the kernel message console
2395 * @new: The new virtual terminal number or -1 if the console should stay
2398 * By default, the kernel messages are always printed on the current virtual
2399 * console. However, the user may modify that default with the
2400 * TIOCL_SETKMSGREDIRECT ioctl call.
2402 * This function sets the kernel message console to be @new. It returns the old
2403 * virtual console number. The virtual terminal number 0 (both as parameter and
2404 * return value) means no redirection (i.e. always printed on the currently
2407 * The parameter -1 means that only the current console is returned, but the
2408 * value is not modified. You may use the macro vt_get_kmsg_redirect() in that
2409 * case to make the code more understandable.
2411 * When the kernel is compiled without CONFIG_VT_CONSOLE, this function ignores
2412 * the parameter and always returns 0.
2414 int vt_kmsg_redirect(int new)
2416 static int kmsg_con;
2419 return xchg(&kmsg_con, new);
2425 * Console on virtual terminal
2427 * The console must be locked when we get here.
2430 static void vt_console_print(struct console *co, const char *b, unsigned count)
2432 struct vc_data *vc = vc_cons[fg_console].d;
2434 static DEFINE_SPINLOCK(printing_lock);
2435 const ushort *start;
2440 /* console busy or not yet initialized */
2443 if (!spin_trylock(&printing_lock))
2446 kmsg_console = vt_get_kmsg_redirect();
2447 if (kmsg_console && vc_cons_allocated(kmsg_console - 1))
2448 vc = vc_cons[kmsg_console - 1].d;
2450 /* read `x' only after setting currcons properly (otherwise
2451 the `x' macro will read the x of the foreground console). */
2454 if (!vc_cons_allocated(fg_console)) {
2456 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2460 if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc))
2463 /* undraw cursor first */
2467 start = (ushort *)vc->vc_pos;
2469 /* Contrived structure to try to emulate original need_wrap behaviour
2470 * Problems caused when we have need_wrap set on '\n' character */
2473 if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) {
2475 if (CON_IS_VISIBLE(vc))
2476 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2478 if (vc->vc_need_wrap)
2482 if (c == 8) { /* backspace */
2484 start = (ushort *)vc->vc_pos;
2491 start = (ushort *)vc->vc_pos;
2493 if (c == 10 || c == 13)
2496 scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos);
2497 notify_write(vc, c);
2499 if (myx == vc->vc_cols - 1) {
2500 vc->vc_need_wrap = 1;
2507 if (CON_IS_VISIBLE(vc))
2508 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2510 if (vc->vc_x == vc->vc_cols) {
2512 vc->vc_need_wrap = 1;
2519 spin_unlock(&printing_lock);
2522 static struct tty_driver *vt_console_device(struct console *c, int *index)
2524 *index = c->index ? c->index-1 : fg_console;
2525 return console_driver;
2528 static struct console vt_console_driver = {
2530 .write = vt_console_print,
2531 .device = vt_console_device,
2532 .unblank = unblank_screen,
2533 .flags = CON_PRINTBUFFER,
2539 * Handling of Linux-specific VC ioctls
2543 * Generally a bit racy with respect to console_lock();.
2545 * There are some functions which don't need it.
2547 * There are some functions which can sleep for arbitrary periods
2548 * (paste_selection) but we don't need the lock there anyway.
2550 * set_selection has locking, and definitely needs it
2553 int tioclinux(struct tty_struct *tty, unsigned long arg)
2556 char __user *p = (char __user *)arg;
2560 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN))
2562 if (get_user(type, p))
2570 ret = set_selection((struct tiocl_selection __user *)(p+1), tty);
2573 case TIOCL_PASTESEL:
2574 ret = paste_selection(tty);
2576 case TIOCL_UNBLANKSCREEN:
2581 case TIOCL_SELLOADLUT:
2583 ret = sel_loadlut(p);
2586 case TIOCL_GETSHIFTSTATE:
2589 * Make it possible to react to Shift+Mousebutton.
2590 * Note that 'shift_state' is an undocumented
2591 * kernel-internal variable; programs not closely
2592 * related to the kernel should not use this.
2594 data = vt_get_shift_state();
2595 ret = __put_user(data, p);
2597 case TIOCL_GETMOUSEREPORTING:
2598 console_lock(); /* May be overkill */
2599 data = mouse_reporting();
2601 ret = __put_user(data, p);
2603 case TIOCL_SETVESABLANK:
2605 ret = set_vesa_blanking(p);
2608 case TIOCL_GETKMSGREDIRECT:
2609 data = vt_get_kmsg_redirect();
2610 ret = __put_user(data, p);
2612 case TIOCL_SETKMSGREDIRECT:
2613 if (!capable(CAP_SYS_ADMIN)) {
2616 if (get_user(data, p+1))
2619 vt_kmsg_redirect(data);
2622 case TIOCL_GETFGCONSOLE:
2623 /* No locking needed as this is a transiently
2624 correct return anyway if the caller hasn't
2625 disabled switching */
2628 case TIOCL_SCROLLCONSOLE:
2629 if (get_user(lines, (s32 __user *)(p+4))) {
2632 /* Need the console lock here. Note that lots
2633 of other calls need fixing before the lock
2634 is actually useful ! */
2636 scrollfront(vc_cons[fg_console].d, lines);
2641 case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
2647 case TIOCL_BLANKEDSCREEN:
2648 ret = console_blanked;
2658 * /dev/ttyN handling
2661 static int con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2665 retval = do_con_write(tty, buf, count);
2666 con_flush_chars(tty);
2671 static int con_put_char(struct tty_struct *tty, unsigned char ch)
2674 return 0; /* n_r3964 calls put_char() from interrupt context */
2675 return do_con_write(tty, &ch, 1);
2678 static int con_write_room(struct tty_struct *tty)
2682 return 32768; /* No limit, really; we're not buffering */
2685 static int con_chars_in_buffer(struct tty_struct *tty)
2687 return 0; /* we're not buffering */
2691 * con_throttle and con_unthrottle are only used for
2692 * paste_selection(), which has to stuff in a large number of
2695 static void con_throttle(struct tty_struct *tty)
2699 static void con_unthrottle(struct tty_struct *tty)
2701 struct vc_data *vc = tty->driver_data;
2703 wake_up_interruptible(&vc->paste_wait);
2707 * Turn the Scroll-Lock LED on when the tty is stopped
2709 static void con_stop(struct tty_struct *tty)
2714 console_num = tty->index;
2715 if (!vc_cons_allocated(console_num))
2717 vt_kbd_con_stop(console_num);
2721 * Turn the Scroll-Lock LED off when the console is started
2723 static void con_start(struct tty_struct *tty)
2728 console_num = tty->index;
2729 if (!vc_cons_allocated(console_num))
2731 vt_kbd_con_start(console_num);
2734 static void con_flush_chars(struct tty_struct *tty)
2738 if (in_interrupt()) /* from flush_to_ldisc */
2741 /* if we race with con_close(), vt may be null */
2743 vc = tty->driver_data;
2750 * Allocate the console screen memory.
2752 static int con_install(struct tty_driver *driver, struct tty_struct *tty)
2754 unsigned int currcons = tty->index;
2759 ret = vc_allocate(currcons);
2763 vc = vc_cons[currcons].d;
2765 /* Still being freed */
2771 ret = tty_port_install(&vc->port, driver, tty);
2775 tty->driver_data = vc;
2778 if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
2779 tty->winsize.ws_row = vc_cons[currcons].d->vc_rows;
2780 tty->winsize.ws_col = vc_cons[currcons].d->vc_cols;
2783 tty->termios.c_iflag |= IUTF8;
2785 tty->termios.c_iflag &= ~IUTF8;
2791 static int con_open(struct tty_struct *tty, struct file *filp)
2793 /* everything done in install */
2798 static void con_close(struct tty_struct *tty, struct file *filp)
2800 /* Nothing to do - we defer to shutdown */
2803 static void con_shutdown(struct tty_struct *tty)
2805 struct vc_data *vc = tty->driver_data;
2808 vc->port.tty = NULL;
2812 static int default_color = 7; /* white */
2813 static int default_italic_color = 2; // green (ASCII)
2814 static int default_underline_color = 3; // cyan (ASCII)
2815 module_param_named(color, default_color, int, S_IRUGO | S_IWUSR);
2816 module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR);
2817 module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR);
2819 static void vc_init(struct vc_data *vc, unsigned int rows,
2820 unsigned int cols, int do_clear)
2826 vc->vc_size_row = cols << 1;
2827 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
2830 vc->vc_pos = vc->vc_origin;
2832 for (j=k=0; j<16; j++) {
2833 vc->vc_palette[k++] = default_red[j] ;
2834 vc->vc_palette[k++] = default_grn[j] ;
2835 vc->vc_palette[k++] = default_blu[j] ;
2837 vc->vc_def_color = default_color;
2838 vc->vc_ulcolor = default_underline_color;
2839 vc->vc_itcolor = default_italic_color;
2840 vc->vc_halfcolor = 0x08; /* grey */
2841 init_waitqueue_head(&vc->paste_wait);
2842 reset_terminal(vc, do_clear);
2846 * This routine initializes console interrupts, and does nothing
2847 * else. If you want the screen to clear, call tty_write with
2848 * the appropriate escape-sequence.
2851 static int __init con_init(void)
2853 const char *display_desc = NULL;
2855 unsigned int currcons = 0, i;
2860 display_desc = conswitchp->con_startup();
2861 if (!display_desc) {
2867 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2868 struct con_driver *con_driver = ®istered_con_driver[i];
2870 if (con_driver->con == NULL) {
2871 con_driver->con = conswitchp;
2872 con_driver->desc = display_desc;
2873 con_driver->flag = CON_DRIVER_FLAG_INIT;
2874 con_driver->first = 0;
2875 con_driver->last = MAX_NR_CONSOLES - 1;
2880 for (i = 0; i < MAX_NR_CONSOLES; i++)
2881 con_driver_map[i] = conswitchp;
2883 if (blankinterval) {
2884 blank_state = blank_normal_wait;
2885 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
2888 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) {
2889 vc_cons[currcons].d = vc = kzalloc(sizeof(struct vc_data), GFP_NOWAIT);
2890 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
2891 tty_port_init(&vc->port);
2892 visual_init(vc, currcons, 1);
2893 vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_NOWAIT);
2894 vc_init(vc, vc->vc_rows, vc->vc_cols,
2895 currcons || !vc->vc_sw->con_save_screen);
2897 currcons = fg_console = 0;
2898 master_display_fg = vc = vc_cons[currcons].d;
2901 gotoxy(vc, vc->vc_x, vc->vc_y);
2904 pr_info("Console: %s %s %dx%d\n",
2905 vc->vc_can_do_color ? "colour" : "mono",
2906 display_desc, vc->vc_cols, vc->vc_rows);
2911 #ifdef CONFIG_VT_CONSOLE
2912 register_console(&vt_console_driver);
2916 console_initcall(con_init);
2918 static const struct tty_operations con_ops = {
2919 .install = con_install,
2923 .write_room = con_write_room,
2924 .put_char = con_put_char,
2925 .flush_chars = con_flush_chars,
2926 .chars_in_buffer = con_chars_in_buffer,
2928 #ifdef CONFIG_COMPAT
2929 .compat_ioctl = vt_compat_ioctl,
2933 .throttle = con_throttle,
2934 .unthrottle = con_unthrottle,
2935 .resize = vt_resize,
2936 .shutdown = con_shutdown
2939 static struct cdev vc0_cdev;
2941 static ssize_t show_tty_active(struct device *dev,
2942 struct device_attribute *attr, char *buf)
2944 return sprintf(buf, "tty%d\n", fg_console + 1);
2946 static DEVICE_ATTR(active, S_IRUGO, show_tty_active, NULL);
2948 int __init vty_init(const struct file_operations *console_fops)
2950 cdev_init(&vc0_cdev, console_fops);
2951 if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) ||
2952 register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0)
2953 panic("Couldn't register /dev/tty0 driver\n");
2954 tty0dev = device_create(tty_class, NULL, MKDEV(TTY_MAJOR, 0), NULL, "tty0");
2955 if (IS_ERR(tty0dev))
2958 WARN_ON(device_create_file(tty0dev, &dev_attr_active) < 0);
2962 console_driver = alloc_tty_driver(MAX_NR_CONSOLES);
2963 if (!console_driver)
2964 panic("Couldn't allocate console driver\n");
2966 console_driver->name = "tty";
2967 console_driver->name_base = 1;
2968 console_driver->major = TTY_MAJOR;
2969 console_driver->minor_start = 1;
2970 console_driver->type = TTY_DRIVER_TYPE_CONSOLE;
2971 console_driver->init_termios = tty_std_termios;
2973 console_driver->init_termios.c_iflag |= IUTF8;
2974 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS;
2975 tty_set_operations(console_driver, &con_ops);
2976 if (tty_register_driver(console_driver))
2977 panic("Couldn't register console driver\n");
2980 #ifdef CONFIG_MDA_CONSOLE
2986 #ifndef VT_SINGLE_DRIVER
2988 static struct class *vtconsole_class;
2990 static int do_bind_con_driver(const struct consw *csw, int first, int last,
2993 struct module *owner = csw->owner;
2994 const char *desc = NULL;
2995 struct con_driver *con_driver;
2996 int i, j = -1, k = -1, retval = -ENODEV;
2998 if (!try_module_get(owner))
3001 WARN_CONSOLE_UNLOCKED();
3003 /* check if driver is registered */
3004 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3005 con_driver = ®istered_con_driver[i];
3007 if (con_driver->con == csw) {
3008 desc = con_driver->desc;
3017 if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) {
3019 con_driver->flag |= CON_DRIVER_FLAG_INIT;
3024 module_put(conswitchp->owner);
3026 __module_get(owner);
3030 first = max(first, con_driver->first);
3031 last = min(last, con_driver->last);
3033 for (i = first; i <= last; i++) {
3035 struct vc_data *vc = vc_cons[i].d;
3037 if (con_driver_map[i])
3038 module_put(con_driver_map[i]->owner);
3039 __module_get(owner);
3040 con_driver_map[i] = csw;
3042 if (!vc || !vc->vc_sw)
3047 if (CON_IS_VISIBLE(vc)) {
3052 old_was_color = vc->vc_can_do_color;
3053 vc->vc_sw->con_deinit(vc);
3054 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
3055 visual_init(vc, i, 0);
3059 /* If the console changed between mono <-> color, then
3060 * the attributes in the screenbuf will be wrong. The
3061 * following resets all attributes to something sane.
3063 if (old_was_color != vc->vc_can_do_color)
3064 clear_buffer_attributes(vc);
3067 pr_info("Console: switching ");
3069 printk("consoles %d-%d ", first+1, last+1);
3071 struct vc_data *vc = vc_cons[j].d;
3073 printk("to %s %s %dx%d\n",
3074 vc->vc_can_do_color ? "colour" : "mono",
3075 desc, vc->vc_cols, vc->vc_rows);
3082 printk("to %s\n", desc);
3091 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
3092 static int con_is_graphics(const struct consw *csw, int first, int last)
3096 for (i = first; i <= last; i++) {
3097 struct vc_data *vc = vc_cons[i].d;
3099 if (vc && vc->vc_mode == KD_GRAPHICS) {
3108 /* unlocked version of unbind_con_driver() */
3109 int do_unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
3111 struct module *owner = csw->owner;
3112 const struct consw *defcsw = NULL;
3113 struct con_driver *con_driver = NULL, *con_back = NULL;
3114 int i, retval = -ENODEV;
3116 if (!try_module_get(owner))
3119 WARN_CONSOLE_UNLOCKED();
3121 /* check if driver is registered and if it is unbindable */
3122 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3123 con_driver = ®istered_con_driver[i];
3125 if (con_driver->con == csw &&
3126 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3137 /* check if backup driver exists */
3138 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3139 con_back = ®istered_con_driver[i];
3141 if (con_back->con &&
3142 !(con_back->flag & CON_DRIVER_FLAG_MODULE)) {
3143 defcsw = con_back->con;
3152 if (!con_is_bound(csw))
3155 first = max(first, con_driver->first);
3156 last = min(last, con_driver->last);
3158 for (i = first; i <= last; i++) {
3159 if (con_driver_map[i] == csw) {
3160 module_put(csw->owner);
3161 con_driver_map[i] = NULL;
3165 if (!con_is_bound(defcsw)) {
3166 const struct consw *defconsw = conswitchp;
3168 defcsw->con_startup();
3169 con_back->flag |= CON_DRIVER_FLAG_INIT;
3171 * vgacon may change the default driver to point
3172 * to dummycon, we restore it here...
3174 conswitchp = defconsw;
3177 if (!con_is_bound(csw))
3178 con_driver->flag &= ~CON_DRIVER_FLAG_INIT;
3180 /* ignore return value, binding should not fail */
3181 do_bind_con_driver(defcsw, first, last, deflt);
3187 EXPORT_SYMBOL_GPL(do_unbind_con_driver);
3189 static int vt_bind(struct con_driver *con)
3191 const struct consw *defcsw = NULL, *csw = NULL;
3192 int i, more = 1, first = -1, last = -1, deflt = 0;
3194 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3195 con_is_graphics(con->con, con->first, con->last))
3200 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3201 struct con_driver *con = ®istered_con_driver[i];
3203 if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) {
3215 for (i = con->first; i <= con->last; i++) {
3216 if (con_driver_map[i] == defcsw) {
3221 } else if (first != -1)
3225 if (first == 0 && last == MAX_NR_CONSOLES -1)
3230 do_bind_con_driver(csw, first, last, deflt);
3243 static int vt_unbind(struct con_driver *con)
3245 const struct consw *csw = NULL;
3246 int i, more = 1, first = -1, last = -1, deflt = 0;
3248 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3249 con_is_graphics(con->con, con->first, con->last))
3257 for (i = con->first; i <= con->last; i++) {
3258 if (con_driver_map[i] == csw) {
3263 } else if (first != -1)
3267 if (first == 0 && last == MAX_NR_CONSOLES -1)
3272 do_unbind_con_driver(csw, first, last, deflt);
3285 static inline int vt_bind(struct con_driver *con)
3289 static inline int vt_unbind(struct con_driver *con)
3293 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3295 static ssize_t store_bind(struct device *dev, struct device_attribute *attr,
3296 const char *buf, size_t count)
3298 struct con_driver *con = dev_get_drvdata(dev);
3299 int bind = simple_strtoul(buf, NULL, 0);
3309 static ssize_t show_bind(struct device *dev, struct device_attribute *attr,
3312 struct con_driver *con = dev_get_drvdata(dev);
3313 int bind = con_is_bound(con->con);
3315 return snprintf(buf, PAGE_SIZE, "%i\n", bind);
3318 static ssize_t show_name(struct device *dev, struct device_attribute *attr,
3321 struct con_driver *con = dev_get_drvdata(dev);
3323 return snprintf(buf, PAGE_SIZE, "%s %s\n",
3324 (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)",
3329 static struct device_attribute device_attrs[] = {
3330 __ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind),
3331 __ATTR(name, S_IRUGO, show_name, NULL),
3334 static int vtconsole_init_device(struct con_driver *con)
3339 con->flag |= CON_DRIVER_FLAG_ATTR;
3340 dev_set_drvdata(con->dev, con);
3341 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3342 error = device_create_file(con->dev, &device_attrs[i]);
3349 device_remove_file(con->dev, &device_attrs[i]);
3350 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3356 static void vtconsole_deinit_device(struct con_driver *con)
3360 if (con->flag & CON_DRIVER_FLAG_ATTR) {
3361 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3362 device_remove_file(con->dev, &device_attrs[i]);
3363 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3368 * con_is_bound - checks if driver is bound to the console
3369 * @csw: console driver
3371 * RETURNS: zero if unbound, nonzero if bound
3373 * Drivers can call this and if zero, they should release
3374 * all resources allocated on con_startup()
3376 int con_is_bound(const struct consw *csw)
3380 for (i = 0; i < MAX_NR_CONSOLES; i++) {
3381 if (con_driver_map[i] == csw) {
3389 EXPORT_SYMBOL(con_is_bound);
3392 * con_debug_enter - prepare the console for the kernel debugger
3393 * @sw: console driver
3395 * Called when the console is taken over by the kernel debugger, this
3396 * function needs to save the current console state, then put the console
3397 * into a state suitable for the kernel debugger.
3400 * Zero on success, nonzero if a failure occurred when trying to prepare
3401 * the console for the debugger.
3403 int con_debug_enter(struct vc_data *vc)
3407 saved_fg_console = fg_console;
3408 saved_last_console = last_console;
3409 saved_want_console = want_console;
3410 saved_vc_mode = vc->vc_mode;
3411 saved_console_blanked = console_blanked;
3412 vc->vc_mode = KD_TEXT;
3413 console_blanked = 0;
3414 if (vc->vc_sw->con_debug_enter)
3415 ret = vc->vc_sw->con_debug_enter(vc);
3416 #ifdef CONFIG_KGDB_KDB
3417 /* Set the initial LINES variable if it is not already set */
3418 if (vc->vc_rows < 999) {
3421 const char *setargs[3] = {
3426 if (kdbgetintenv(setargs[0], &linecount)) {
3427 snprintf(lns, 4, "%i", vc->vc_rows);
3428 kdb_set(2, setargs);
3431 if (vc->vc_cols < 999) {
3434 const char *setargs[3] = {
3439 if (kdbgetintenv(setargs[0], &colcount)) {
3440 snprintf(cols, 4, "%i", vc->vc_cols);
3441 kdb_set(2, setargs);
3444 #endif /* CONFIG_KGDB_KDB */
3447 EXPORT_SYMBOL_GPL(con_debug_enter);
3450 * con_debug_leave - restore console state
3451 * @sw: console driver
3453 * Restore the console state to what it was before the kernel debugger
3457 * Zero on success, nonzero if a failure occurred when trying to restore
3460 int con_debug_leave(void)
3465 fg_console = saved_fg_console;
3466 last_console = saved_last_console;
3467 want_console = saved_want_console;
3468 console_blanked = saved_console_blanked;
3469 vc_cons[fg_console].d->vc_mode = saved_vc_mode;
3471 vc = vc_cons[fg_console].d;
3472 if (vc->vc_sw->con_debug_leave)
3473 ret = vc->vc_sw->con_debug_leave(vc);
3476 EXPORT_SYMBOL_GPL(con_debug_leave);
3478 static int do_register_con_driver(const struct consw *csw, int first, int last)
3480 struct module *owner = csw->owner;
3481 struct con_driver *con_driver;
3485 WARN_CONSOLE_UNLOCKED();
3487 if (!try_module_get(owner))
3490 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3491 con_driver = ®istered_con_driver[i];
3493 /* already registered */
3494 if (con_driver->con == csw)
3501 desc = csw->con_startup();
3508 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3509 con_driver = ®istered_con_driver[i];
3511 if (con_driver->con == NULL) {
3512 con_driver->con = csw;
3513 con_driver->desc = desc;
3514 con_driver->node = i;
3515 con_driver->flag = CON_DRIVER_FLAG_MODULE |
3516 CON_DRIVER_FLAG_INIT;
3517 con_driver->first = first;
3518 con_driver->last = last;
3527 con_driver->dev = device_create(vtconsole_class, NULL,
3528 MKDEV(0, con_driver->node),
3532 if (IS_ERR(con_driver->dev)) {
3533 printk(KERN_WARNING "Unable to create device for %s; "
3534 "errno = %ld\n", con_driver->desc,
3535 PTR_ERR(con_driver->dev));
3536 con_driver->dev = NULL;
3538 vtconsole_init_device(con_driver);
3548 * do_unregister_con_driver - unregister console driver from console layer
3549 * @csw: console driver
3551 * DESCRIPTION: All drivers that registers to the console layer must
3552 * call this function upon exit, or if the console driver is in a state
3553 * where it won't be able to handle console services, such as the
3554 * framebuffer console without loaded framebuffer drivers.
3556 * The driver must unbind first prior to unregistration.
3558 int do_unregister_con_driver(const struct consw *csw)
3560 int i, retval = -ENODEV;
3562 /* cannot unregister a bound driver */
3563 if (con_is_bound(csw))
3566 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3567 struct con_driver *con_driver = ®istered_con_driver[i];
3569 if (con_driver->con == csw &&
3570 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3571 vtconsole_deinit_device(con_driver);
3572 device_destroy(vtconsole_class,
3573 MKDEV(0, con_driver->node));
3574 con_driver->con = NULL;
3575 con_driver->desc = NULL;
3576 con_driver->dev = NULL;
3577 con_driver->node = 0;
3578 con_driver->flag = 0;
3579 con_driver->first = 0;
3580 con_driver->last = 0;
3588 EXPORT_SYMBOL_GPL(do_unregister_con_driver);
3591 * If we support more console drivers, this function is used
3592 * when a driver wants to take over some existing consoles
3593 * and become default driver for newly opened ones.
3595 * do_take_over_console is basically a register followed by unbind
3597 int do_take_over_console(const struct consw *csw, int first, int last, int deflt)
3601 err = do_register_con_driver(csw, first, last);
3603 * If we get an busy error we still want to bind the console driver
3604 * and return success, as we may have unbound the console driver
3605 * but not unregistered it.
3610 do_bind_con_driver(csw, first, last, deflt);
3614 EXPORT_SYMBOL_GPL(do_take_over_console);
3618 * give_up_console is a wrapper to unregister_con_driver. It will only
3619 * work if driver is fully unbound.
3621 void give_up_console(const struct consw *csw)
3624 do_unregister_con_driver(csw);
3628 static int __init vtconsole_class_init(void)
3632 vtconsole_class = class_create(THIS_MODULE, "vtconsole");
3633 if (IS_ERR(vtconsole_class)) {
3634 printk(KERN_WARNING "Unable to create vt console class; "
3635 "errno = %ld\n", PTR_ERR(vtconsole_class));
3636 vtconsole_class = NULL;
3639 /* Add system drivers to sysfs */
3640 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3641 struct con_driver *con = ®istered_con_driver[i];
3643 if (con->con && !con->dev) {
3644 con->dev = device_create(vtconsole_class, NULL,
3645 MKDEV(0, con->node),
3649 if (IS_ERR(con->dev)) {
3650 printk(KERN_WARNING "Unable to create "
3651 "device for %s; errno = %ld\n",
3652 con->desc, PTR_ERR(con->dev));
3655 vtconsole_init_device(con);
3662 postcore_initcall(vtconsole_class_init);
3670 static int set_vesa_blanking(char __user *p)
3674 if (get_user(mode, p + 1))
3677 vesa_blank_mode = (mode < 4) ? mode : 0;
3681 void do_blank_screen(int entering_gfx)
3683 struct vc_data *vc = vc_cons[fg_console].d;
3686 WARN_CONSOLE_UNLOCKED();
3688 if (console_blanked) {
3689 if (blank_state == blank_vesa_wait) {
3690 blank_state = blank_off;
3691 vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0);
3696 /* entering graphics mode? */
3700 vc->vc_sw->con_blank(vc, -1, 1);
3701 console_blanked = fg_console + 1;
3702 blank_state = blank_off;
3707 if (blank_state != blank_normal_wait)
3709 blank_state = blank_off;
3711 /* don't blank graphics */
3712 if (vc->vc_mode != KD_TEXT) {
3713 console_blanked = fg_console + 1;
3718 del_timer_sync(&console_timer);
3719 blank_timer_expired = 0;
3722 /* In case we need to reset origin, blanking hook returns 1 */
3723 i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0);
3724 console_blanked = fg_console + 1;
3728 if (console_blank_hook && console_blank_hook(1))
3731 if (vesa_off_interval && vesa_blank_mode) {
3732 blank_state = blank_vesa_wait;
3733 mod_timer(&console_timer, jiffies + vesa_off_interval);
3735 vt_event_post(VT_EVENT_BLANK, vc->vc_num, vc->vc_num);
3737 EXPORT_SYMBOL(do_blank_screen);
3740 * Called by timer as well as from vt_console_driver
3742 void do_unblank_screen(int leaving_gfx)
3746 /* This should now always be called from a "sane" (read: can schedule)
3747 * context for the sake of the low level drivers, except in the special
3748 * case of oops_in_progress
3750 if (!oops_in_progress)
3753 WARN_CONSOLE_UNLOCKED();
3756 if (!console_blanked)
3758 if (!vc_cons_allocated(fg_console)) {
3760 pr_warning("unblank_screen: tty %d not allocated ??\n",
3764 vc = vc_cons[fg_console].d;
3765 /* Try to unblank in oops case too */
3766 if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc))
3767 return; /* but leave console_blanked != 0 */
3769 if (blankinterval) {
3770 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
3771 blank_state = blank_normal_wait;
3774 console_blanked = 0;
3775 if (vc->vc_sw->con_blank(vc, 0, leaving_gfx) || vt_force_oops_output(vc))
3776 /* Low-level driver cannot restore -> do it ourselves */
3778 if (console_blank_hook)
3779 console_blank_hook(0);
3782 vt_event_post(VT_EVENT_UNBLANK, vc->vc_num, vc->vc_num);
3784 EXPORT_SYMBOL(do_unblank_screen);
3787 * This is called by the outside world to cause a forced unblank, mostly for
3788 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
3789 * call it with 1 as an argument and so force a mode restore... that may kill
3790 * X or at least garbage the screen but would also make the Oops visible...
3792 void unblank_screen(void)
3794 do_unblank_screen(0);
3798 * We defer the timer blanking to work queue so it can take the console mutex
3799 * (console operations can still happen at irq time, but only from printk which
3800 * has the console mutex. Not perfect yet, but better than no locking
3802 static void blank_screen_t(unsigned long dummy)
3804 if (unlikely(!keventd_up())) {
3805 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
3808 blank_timer_expired = 1;
3809 schedule_work(&console_work);
3812 void poke_blanked_console(void)
3814 WARN_CONSOLE_UNLOCKED();
3816 /* Add this so we quickly catch whoever might call us in a non
3817 * safe context. Nowadays, unblank_screen() isn't to be called in
3818 * atomic contexts and is allowed to schedule (with the special case
3819 * of oops_in_progress, but that isn't of any concern for this
3824 /* This isn't perfectly race free, but a race here would be mostly harmless,
3825 * at worse, we'll do a spurrious blank and it's unlikely
3827 del_timer(&console_timer);
3828 blank_timer_expired = 0;
3830 if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS)
3832 if (console_blanked)
3834 else if (blankinterval) {
3835 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
3836 blank_state = blank_normal_wait;
3844 static void set_palette(struct vc_data *vc)
3846 WARN_CONSOLE_UNLOCKED();
3848 if (vc->vc_mode != KD_GRAPHICS)
3849 vc->vc_sw->con_set_palette(vc, color_table);
3853 * Load palette into the DAC registers. arg points to a colour
3854 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
3857 int con_set_cmap(unsigned char __user *arg)
3860 unsigned char colormap[3*16];
3862 if (copy_from_user(colormap, arg, sizeof(colormap)))
3866 for (i = k = 0; i < 16; i++) {
3867 default_red[i] = colormap[k++];
3868 default_grn[i] = colormap[k++];
3869 default_blu[i] = colormap[k++];
3871 for (i = 0; i < MAX_NR_CONSOLES; i++) {
3872 if (!vc_cons_allocated(i))
3874 for (j = k = 0; j < 16; j++) {
3875 vc_cons[i].d->vc_palette[k++] = default_red[j];
3876 vc_cons[i].d->vc_palette[k++] = default_grn[j];
3877 vc_cons[i].d->vc_palette[k++] = default_blu[j];
3879 set_palette(vc_cons[i].d);
3886 int con_get_cmap(unsigned char __user *arg)
3889 unsigned char colormap[3*16];
3892 for (i = k = 0; i < 16; i++) {
3893 colormap[k++] = default_red[i];
3894 colormap[k++] = default_grn[i];
3895 colormap[k++] = default_blu[i];
3899 if (copy_to_user(arg, colormap, sizeof(colormap)))
3905 void reset_palette(struct vc_data *vc)
3908 for (j=k=0; j<16; j++) {
3909 vc->vc_palette[k++] = default_red[j];
3910 vc->vc_palette[k++] = default_grn[j];
3911 vc->vc_palette[k++] = default_blu[j];
3919 * Currently we only support fonts up to 32 pixels wide, at a maximum height
3920 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
3921 * depending on width) reserved for each character which is kinda wasty, but
3922 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
3923 * is up to the actual low-level console-driver convert data into its favorite
3924 * format (maybe we should add a `fontoffset' field to the `display'
3925 * structure so we won't have to convert the fontdata all the time.
3929 #define max_font_size 65536
3931 static int con_font_get(struct vc_data *vc, struct console_font_op *op)
3933 struct console_font font;
3938 font.data = kmalloc(max_font_size, GFP_KERNEL);
3945 if (vc->vc_mode != KD_TEXT)
3947 else if (vc->vc_sw->con_font_get)
3948 rc = vc->vc_sw->con_font_get(vc, &font);
3956 c = (font.width+7)/8 * 32 * font.charcount;
3958 if (op->data && font.charcount > op->charcount)
3960 if (!(op->flags & KD_FONT_FLAG_OLD)) {
3961 if (font.width > op->width || font.height > op->height)
3964 if (font.width != 8)
3966 else if ((op->height && font.height > op->height) ||
3973 op->height = font.height;
3974 op->width = font.width;
3975 op->charcount = font.charcount;
3977 if (op->data && copy_to_user(op->data, font.data, c))
3985 static int con_font_set(struct vc_data *vc, struct console_font_op *op)
3987 struct console_font font;
3991 if (vc->vc_mode != KD_TEXT)
3995 if (op->charcount > 512)
3997 if (!op->height) { /* Need to guess font height [compat] */
3999 u8 __user *charmap = op->data;
4002 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
4003 so that we can get rid of this soon */
4004 if (!(op->flags & KD_FONT_FLAG_OLD))
4006 for (h = 32; h > 0; h--)
4007 for (i = 0; i < op->charcount; i++) {
4008 if (get_user(tmp, &charmap[32*i+h-1]))
4017 if (op->width <= 0 || op->width > 32 || op->height > 32)
4019 size = (op->width+7)/8 * 32 * op->charcount;
4020 if (size > max_font_size)
4022 font.charcount = op->charcount;
4023 font.height = op->height;
4024 font.width = op->width;
4025 font.data = memdup_user(op->data, size);
4026 if (IS_ERR(font.data))
4027 return PTR_ERR(font.data);
4029 if (vc->vc_mode != KD_TEXT)
4031 else if (vc->vc_sw->con_font_set)
4032 rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
4040 static int con_font_default(struct vc_data *vc, struct console_font_op *op)
4042 struct console_font font = {.width = op->width, .height = op->height};
4043 char name[MAX_FONT_NAME];
4050 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0)
4053 name[MAX_FONT_NAME - 1] = 0;
4056 if (vc->vc_mode != KD_TEXT) {
4060 if (vc->vc_sw->con_font_default)
4061 rc = vc->vc_sw->con_font_default(vc, &font, s);
4066 op->width = font.width;
4067 op->height = font.height;
4072 static int con_font_copy(struct vc_data *vc, struct console_font_op *op)
4074 int con = op->height;
4079 if (vc->vc_mode != KD_TEXT)
4081 else if (!vc->vc_sw->con_font_copy)
4083 else if (con < 0 || !vc_cons_allocated(con))
4085 else if (con == vc->vc_num) /* nothing to do */
4088 rc = vc->vc_sw->con_font_copy(vc, con);
4093 int con_font_op(struct vc_data *vc, struct console_font_op *op)
4096 case KD_FONT_OP_SET:
4097 return con_font_set(vc, op);
4098 case KD_FONT_OP_GET:
4099 return con_font_get(vc, op);
4100 case KD_FONT_OP_SET_DEFAULT:
4101 return con_font_default(vc, op);
4102 case KD_FONT_OP_COPY:
4103 return con_font_copy(vc, op);
4109 * Interface exported to selection and vcs.
4112 /* used by selection */
4113 u16 screen_glyph(struct vc_data *vc, int offset)
4115 u16 w = scr_readw(screenpos(vc, offset, 1));
4118 if (w & vc->vc_hi_font_mask)
4122 EXPORT_SYMBOL_GPL(screen_glyph);
4124 /* used by vcs - note the word offset */
4125 unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed)
4127 return screenpos(vc, 2 * w_offset, viewed);
4130 void getconsxy(struct vc_data *vc, unsigned char *p)
4136 void putconsxy(struct vc_data *vc, unsigned char *p)
4139 gotoxy(vc, p[0], p[1]);
4143 u16 vcs_scr_readw(struct vc_data *vc, const u16 *org)
4145 if ((unsigned long)org == vc->vc_pos && softcursor_original != -1)
4146 return softcursor_original;
4147 return scr_readw(org);
4150 void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org)
4152 scr_writew(val, org);
4153 if ((unsigned long)org == vc->vc_pos) {
4154 softcursor_original = -1;
4159 void vcs_scr_updated(struct vc_data *vc)
4165 * Visible symbols for modules
4168 EXPORT_SYMBOL(color_table);
4169 EXPORT_SYMBOL(default_red);
4170 EXPORT_SYMBOL(default_grn);
4171 EXPORT_SYMBOL(default_blu);
4172 EXPORT_SYMBOL(update_region);
4173 EXPORT_SYMBOL(redraw_screen);
4174 EXPORT_SYMBOL(vc_resize);
4175 EXPORT_SYMBOL(fg_console);
4176 EXPORT_SYMBOL(console_blank_hook);
4177 EXPORT_SYMBOL(console_blanked);
4178 EXPORT_SYMBOL(vc_cons);
4179 EXPORT_SYMBOL(global_cursor_default);
4180 #ifndef VT_SINGLE_DRIVER
4181 EXPORT_SYMBOL(give_up_console);