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 #define vt_get_kmsg_redirect() vt_kmsg_redirect(-1)
161 static int printable; /* Is console ready for printing? */
162 int default_utf8 = true;
163 module_param(default_utf8, int, S_IRUGO | S_IWUSR);
164 int global_cursor_default = -1;
165 module_param(global_cursor_default, int, S_IRUGO | S_IWUSR);
167 static int cur_default = CUR_DEFAULT;
168 module_param(cur_default, int, S_IRUGO | S_IWUSR);
171 * ignore_poke: don't unblank the screen when things are typed. This is
172 * mainly for the privacy of braille terminal users.
174 static int ignore_poke;
176 int do_poke_blanked_console;
179 static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
180 static int vesa_off_interval;
181 static int blankinterval = 10*60;
182 core_param(consoleblank, blankinterval, int, 0444);
184 static DECLARE_WORK(console_work, console_callback);
187 * fg_console is the current virtual console,
188 * last_console is the last used one,
189 * want_console is the console we want to switch to,
190 * saved_* variants are for save/restore around kernel debugger enter/leave
194 int want_console = -1;
195 static int saved_fg_console;
196 static int saved_last_console;
197 static int saved_want_console;
198 static int saved_vc_mode;
199 static int saved_console_blanked;
202 * For each existing display, we have a pointer to console currently visible
203 * on that display, allowing consoles other than fg_console to be refreshed
204 * appropriately. Unless the low-level driver supplies its own display_fg
205 * variable, we use this one for the "master display".
207 static struct vc_data *master_display_fg;
210 * Unfortunately, we need to delay tty echo when we're currently writing to the
211 * console since the code is (and always was) not re-entrant, so we schedule
212 * all flip requests to process context with schedule-task() and run it from
213 * console_callback().
217 * For the same reason, we defer scrollback to the console callback.
219 static int scrollback_delta;
222 * Hook so that the power management routines can (un)blank
223 * the console on our behalf.
225 int (*console_blank_hook)(int);
227 static DEFINE_TIMER(console_timer, blank_screen_t, 0, 0);
228 static int blank_state;
229 static int blank_timer_expired;
237 * /sys/class/tty/tty0/
239 * the attribute 'active' contains the name of the current vc
240 * console and it supports poll() to detect vc switches
242 static struct device *tty0dev;
245 * Notifier list for console events.
247 static ATOMIC_NOTIFIER_HEAD(vt_notifier_list);
249 int register_vt_notifier(struct notifier_block *nb)
251 return atomic_notifier_chain_register(&vt_notifier_list, nb);
253 EXPORT_SYMBOL_GPL(register_vt_notifier);
255 int unregister_vt_notifier(struct notifier_block *nb)
257 return atomic_notifier_chain_unregister(&vt_notifier_list, nb);
259 EXPORT_SYMBOL_GPL(unregister_vt_notifier);
261 static void notify_write(struct vc_data *vc, unsigned int unicode)
263 struct vt_notifier_param param = { .vc = vc, .c = unicode };
264 atomic_notifier_call_chain(&vt_notifier_list, VT_WRITE, ¶m);
267 static void notify_update(struct vc_data *vc)
269 struct vt_notifier_param param = { .vc = vc };
270 atomic_notifier_call_chain(&vt_notifier_list, VT_UPDATE, ¶m);
273 * Low-Level Functions
276 #define IS_FG(vc) ((vc)->vc_num == fg_console)
278 #ifdef VT_BUF_VRAM_ONLY
279 #define DO_UPDATE(vc) 0
281 #define DO_UPDATE(vc) (CON_IS_VISIBLE(vc) && !console_blanked)
284 static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed)
289 p = (unsigned short *)(vc->vc_origin + offset);
290 else if (!vc->vc_sw->con_screen_pos)
291 p = (unsigned short *)(vc->vc_visible_origin + offset);
293 p = vc->vc_sw->con_screen_pos(vc, offset);
297 /* Called from the keyboard irq path.. */
298 static inline void scrolldelta(int lines)
301 /* scrolldelta needs some kind of consistency lock, but the BKL was
302 and still is not protecting versus the scheduled back end */
303 scrollback_delta += lines;
304 schedule_console_callback();
307 void schedule_console_callback(void)
309 schedule_work(&console_work);
312 static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
314 unsigned short *d, *s;
318 if (b > vc->vc_rows || t >= b || nr < 1)
320 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr))
322 d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
323 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr));
324 scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row);
325 scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_video_erase_char,
326 vc->vc_size_row * nr);
329 static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
336 if (b > vc->vc_rows || t >= b || nr < 1)
338 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr))
340 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
341 step = vc->vc_cols * nr;
342 scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row);
343 scr_memsetw(s, vc->vc_video_erase_char, 2 * step);
346 static void do_update_region(struct vc_data *vc, unsigned long start, int count)
348 #ifndef VT_BUF_VRAM_ONLY
349 unsigned int xx, yy, offset;
353 if (!vc->vc_sw->con_getxy) {
354 offset = (start - vc->vc_origin) / 2;
355 xx = offset % vc->vc_cols;
356 yy = offset / vc->vc_cols;
359 start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy);
363 u16 attrib = scr_readw(p) & 0xff00;
366 while (xx < vc->vc_cols && count) {
367 if (attrib != (scr_readw(p) & 0xff00)) {
369 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
372 attrib = scr_readw(p) & 0xff00;
379 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
384 if (vc->vc_sw->con_getxy) {
386 start = vc->vc_sw->con_getxy(vc, start, NULL, NULL);
392 void update_region(struct vc_data *vc, unsigned long start, int count)
394 WARN_CONSOLE_UNLOCKED();
398 do_update_region(vc, start, count);
403 /* Structure of attributes is hardware-dependent */
405 static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink,
406 u8 _underline, u8 _reverse, u8 _italic)
408 if (vc->vc_sw->con_build_attr)
409 return vc->vc_sw->con_build_attr(vc, _color, _intensity,
410 _blink, _underline, _reverse, _italic);
412 #ifndef VT_BUF_VRAM_ONLY
414 * ++roman: I completely changed the attribute format for monochrome
415 * mode (!can_do_color). The formerly used MDA (monochrome display
416 * adapter) format didn't allow the combination of certain effects.
417 * Now the attribute is just a bit vector:
418 * Bit 0..1: intensity (0..2)
425 if (!vc->vc_can_do_color)
428 (_underline ? 4 : 0) |
432 a = (a & 0xF0) | vc->vc_itcolor;
434 a = (a & 0xf0) | vc->vc_ulcolor;
435 else if (_intensity == 0)
436 a = (a & 0xf0) | vc->vc_ulcolor;
438 a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77);
443 if (vc->vc_hi_font_mask == 0x100)
452 static void update_attr(struct vc_data *vc)
454 vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity,
455 vc->vc_blink, vc->vc_underline,
456 vc->vc_reverse ^ vc->vc_decscnm, vc->vc_italic);
457 vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm, 0) << 8) | ' ';
460 /* Note: inverting the screen twice should revert to the original state */
461 void invert_screen(struct vc_data *vc, int offset, int count, int viewed)
465 WARN_CONSOLE_UNLOCKED();
468 p = screenpos(vc, offset, viewed);
469 if (vc->vc_sw->con_invert_region)
470 vc->vc_sw->con_invert_region(vc, p, count);
471 #ifndef VT_BUF_VRAM_ONLY
477 if (!vc->vc_can_do_color) {
484 } else if (vc->vc_hi_font_mask == 0x100) {
487 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4);
494 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4);
502 do_update_region(vc, (unsigned long) p, count);
506 /* used by selection: complement pointer position */
507 void complement_pos(struct vc_data *vc, int offset)
509 static int old_offset = -1;
510 static unsigned short old;
511 static unsigned short oldx, oldy;
513 WARN_CONSOLE_UNLOCKED();
515 if (old_offset != -1 && old_offset >= 0 &&
516 old_offset < vc->vc_screenbuf_size) {
517 scr_writew(old, screenpos(vc, old_offset, 1));
519 vc->vc_sw->con_putc(vc, old, oldy, oldx);
525 if (offset != -1 && offset >= 0 &&
526 offset < vc->vc_screenbuf_size) {
529 p = screenpos(vc, offset, 1);
531 new = old ^ vc->vc_complement_mask;
534 oldx = (offset >> 1) % vc->vc_cols;
535 oldy = (offset >> 1) / vc->vc_cols;
536 vc->vc_sw->con_putc(vc, new, oldy, oldx);
542 static void insert_char(struct vc_data *vc, unsigned int nr)
544 unsigned short *p = (unsigned short *) vc->vc_pos;
546 scr_memmovew(p + nr, p, (vc->vc_cols - vc->vc_x - nr) * 2);
547 scr_memsetw(p, vc->vc_video_erase_char, nr * 2);
548 vc->vc_need_wrap = 0;
550 do_update_region(vc, (unsigned long) p,
551 vc->vc_cols - vc->vc_x);
554 static void delete_char(struct vc_data *vc, unsigned int nr)
556 unsigned short *p = (unsigned short *) vc->vc_pos;
558 scr_memcpyw(p, p + nr, (vc->vc_cols - vc->vc_x - nr) * 2);
559 scr_memsetw(p + vc->vc_cols - vc->vc_x - nr, vc->vc_video_erase_char,
561 vc->vc_need_wrap = 0;
563 do_update_region(vc, (unsigned long) p,
564 vc->vc_cols - vc->vc_x);
567 static int softcursor_original;
569 static void add_softcursor(struct vc_data *vc)
571 int i = scr_readw((u16 *) vc->vc_pos);
572 u32 type = vc->vc_cursor_type;
574 if (! (type & 0x10)) return;
575 if (softcursor_original != -1) return;
576 softcursor_original = i;
577 i |= ((type >> 8) & 0xff00 );
578 i ^= ((type) & 0xff00 );
579 if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000;
580 if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700;
581 scr_writew(i, (u16 *) vc->vc_pos);
583 vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x);
586 static void hide_softcursor(struct vc_data *vc)
588 if (softcursor_original != -1) {
589 scr_writew(softcursor_original, (u16 *)vc->vc_pos);
591 vc->vc_sw->con_putc(vc, softcursor_original,
593 softcursor_original = -1;
597 static void hide_cursor(struct vc_data *vc)
601 vc->vc_sw->con_cursor(vc, CM_ERASE);
605 static void set_cursor(struct vc_data *vc)
607 if (!IS_FG(vc) || console_blanked ||
608 vc->vc_mode == KD_GRAPHICS)
614 if ((vc->vc_cursor_type & 0x0f) != 1)
615 vc->vc_sw->con_cursor(vc, CM_DRAW);
620 static void set_origin(struct vc_data *vc)
622 WARN_CONSOLE_UNLOCKED();
624 if (!CON_IS_VISIBLE(vc) ||
625 !vc->vc_sw->con_set_origin ||
626 !vc->vc_sw->con_set_origin(vc))
627 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
628 vc->vc_visible_origin = vc->vc_origin;
629 vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size;
630 vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x;
633 static inline void save_screen(struct vc_data *vc)
635 WARN_CONSOLE_UNLOCKED();
637 if (vc->vc_sw->con_save_screen)
638 vc->vc_sw->con_save_screen(vc);
642 * Redrawing of screen
645 void clear_buffer_attributes(struct vc_data *vc)
647 unsigned short *p = (unsigned short *)vc->vc_origin;
648 int count = vc->vc_screenbuf_size / 2;
649 int mask = vc->vc_hi_font_mask | 0xff;
651 for (; count > 0; count--, p++) {
652 scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p);
656 void redraw_screen(struct vc_data *vc, int is_switch)
660 WARN_CONSOLE_UNLOCKED();
664 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
669 struct vc_data *old_vc = vc_cons[fg_console].d;
672 if (!CON_IS_VISIBLE(vc))
674 *vc->vc_display_fg = vc;
675 fg_console = vc->vc_num;
677 if (!CON_IS_VISIBLE(old_vc)) {
682 sysfs_notify(&tty0dev->kobj, NULL, "active");
690 int old_was_color = vc->vc_can_do_color;
693 update = vc->vc_sw->con_switch(vc);
696 * If console changed from mono<->color, the best we can do
697 * is to clear the buffer attributes. As it currently stands,
698 * rebuilding new attributes from the old buffer is not doable
699 * without overly complex code.
701 if (old_was_color != vc->vc_can_do_color) {
703 clear_buffer_attributes(vc);
706 /* Forcibly update if we're panicing */
707 if ((update && vc->vc_mode != KD_GRAPHICS) ||
708 vt_force_oops_output(vc))
709 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
714 compute_shiftstate();
720 * Allocation, freeing and resizing of VTs.
723 int vc_cons_allocated(unsigned int i)
725 return (i < MAX_NR_CONSOLES && vc_cons[i].d);
728 static void visual_init(struct vc_data *vc, int num, int init)
730 /* ++Geert: vc->vc_sw->con_init determines console size */
732 module_put(vc->vc_sw->owner);
733 vc->vc_sw = conswitchp;
734 #ifndef VT_SINGLE_DRIVER
735 if (con_driver_map[num])
736 vc->vc_sw = con_driver_map[num];
738 __module_get(vc->vc_sw->owner);
740 vc->vc_display_fg = &master_display_fg;
741 vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir;
742 vc->vc_uni_pagedir = NULL;
743 vc->vc_hi_font_mask = 0;
744 vc->vc_complement_mask = 0;
745 vc->vc_can_do_color = 0;
746 vc->vc_panic_force_write = false;
747 vc->vc_sw->con_init(vc, init);
748 if (!vc->vc_complement_mask)
749 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
750 vc->vc_s_complement_mask = vc->vc_complement_mask;
751 vc->vc_size_row = vc->vc_cols << 1;
752 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
755 int vc_allocate(unsigned int currcons) /* return 0 on success */
757 WARN_CONSOLE_UNLOCKED();
759 if (currcons >= MAX_NR_CONSOLES)
761 if (!vc_cons[currcons].d) {
763 struct vt_notifier_param param;
765 /* prevent users from taking too much memory */
766 if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE))
769 /* due to the granularity of kmalloc, we waste some memory here */
770 /* the alloc is done in two steps, to optimize the common situation
771 of a 25x80 console (structsize=216, screenbuf_size=4000) */
772 /* although the numbers above are not valid since long ago, the
773 point is still up-to-date and the comment still has its value
774 even if only as a historical artifact. --mj, July 1998 */
775 param.vc = vc = kzalloc(sizeof(struct vc_data), GFP_KERNEL);
778 vc_cons[currcons].d = vc;
779 tty_port_init(&vc->port);
780 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
781 visual_init(vc, currcons, 1);
782 if (!*vc->vc_uni_pagedir_loc)
783 con_set_default_unimap(vc);
784 vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL);
785 if (!vc->vc_screenbuf) {
787 vc_cons[currcons].d = NULL;
791 /* If no drivers have overridden us and the user didn't pass a
792 boot option, default to displaying the cursor */
793 if (global_cursor_default == -1)
794 global_cursor_default = 1;
796 vc_init(vc, vc->vc_rows, vc->vc_cols, 1);
797 vcs_make_sysfs(currcons);
798 atomic_notifier_call_chain(&vt_notifier_list, VT_ALLOCATE, ¶m);
803 static inline int resize_screen(struct vc_data *vc, int width, int height,
806 /* Resizes the resolution of the display adapater */
809 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize)
810 err = vc->vc_sw->con_resize(vc, width, height, user);
816 * Change # of rows and columns (0 means unchanged/the size of fg_console)
817 * [this is to be used together with some user program
818 * like resize that changes the hardware videomode]
820 #define VC_RESIZE_MAXCOL (32767)
821 #define VC_RESIZE_MAXROW (32767)
824 * vc_do_resize - resizing method for the tty
825 * @tty: tty being resized
826 * @real_tty: real tty (different to tty if a pty/tty pair)
827 * @vc: virtual console private data
831 * Resize a virtual console, clipping according to the actual constraints.
832 * If the caller passes a tty structure then update the termios winsize
833 * information and perform any necessary signal handling.
835 * Caller must hold the console semaphore. Takes the termios rwsem and
836 * ctrl_lock of the tty IFF a tty is passed.
839 static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc,
840 unsigned int cols, unsigned int lines)
842 unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0;
844 unsigned int old_rows, old_row_size;
845 unsigned int new_cols, new_rows, new_row_size, new_screen_size;
847 unsigned short *newscreen;
849 WARN_CONSOLE_UNLOCKED();
854 user = vc->vc_resize_user;
855 vc->vc_resize_user = 0;
857 if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW)
860 new_cols = (cols ? cols : vc->vc_cols);
861 new_rows = (lines ? lines : vc->vc_rows);
862 new_row_size = new_cols << 1;
863 new_screen_size = new_row_size * new_rows;
865 if (new_cols == vc->vc_cols && new_rows == vc->vc_rows)
868 newscreen = kmalloc(new_screen_size, GFP_USER);
872 old_rows = vc->vc_rows;
873 old_row_size = vc->vc_size_row;
875 err = resize_screen(vc, new_cols, new_rows, user);
881 vc->vc_rows = new_rows;
882 vc->vc_cols = new_cols;
883 vc->vc_size_row = new_row_size;
884 vc->vc_screenbuf_size = new_screen_size;
886 rlth = min(old_row_size, new_row_size);
887 rrem = new_row_size - rlth;
888 old_origin = vc->vc_origin;
889 new_origin = (long) newscreen;
890 new_scr_end = new_origin + new_screen_size;
892 if (vc->vc_y > new_rows) {
893 if (old_rows - vc->vc_y < new_rows) {
895 * Cursor near the bottom, copy contents from the
898 old_origin += (old_rows - new_rows) * old_row_size;
901 * Cursor is in no man's land, copy 1/2 screenful
902 * from the top and bottom of cursor position
904 old_origin += (vc->vc_y - new_rows/2) * old_row_size;
908 end = old_origin + old_row_size * min(old_rows, new_rows);
912 while (old_origin < end) {
913 scr_memcpyw((unsigned short *) new_origin,
914 (unsigned short *) old_origin, rlth);
916 scr_memsetw((void *)(new_origin + rlth),
917 vc->vc_video_erase_char, rrem);
918 old_origin += old_row_size;
919 new_origin += new_row_size;
921 if (new_scr_end > new_origin)
922 scr_memsetw((void *)new_origin, vc->vc_video_erase_char,
923 new_scr_end - new_origin);
924 kfree(vc->vc_screenbuf);
925 vc->vc_screenbuf = newscreen;
926 vc->vc_screenbuf_size = new_screen_size;
929 /* do part of a reset_terminal() */
931 vc->vc_bottom = vc->vc_rows;
932 gotoxy(vc, vc->vc_x, vc->vc_y);
936 /* Rewrite the requested winsize data with the actual
939 memset(&ws, 0, sizeof(ws));
940 ws.ws_row = vc->vc_rows;
941 ws.ws_col = vc->vc_cols;
942 ws.ws_ypixel = vc->vc_scan_lines;
943 tty_do_resize(tty, &ws);
946 if (CON_IS_VISIBLE(vc))
948 vt_event_post(VT_EVENT_RESIZE, vc->vc_num, vc->vc_num);
953 * vc_resize - resize a VT
954 * @vc: virtual console
958 * Resize a virtual console as seen from the console end of things. We
959 * use the common vc_do_resize methods to update the structures. The
960 * caller must hold the console sem to protect console internals and
964 int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int rows)
966 return vc_do_resize(vc->port.tty, vc, cols, rows);
970 * vt_resize - resize a VT
971 * @tty: tty to resize
972 * @ws: winsize attributes
974 * Resize a virtual terminal. This is called by the tty layer as we
975 * register our own handler for resizing. The mutual helper does all
978 * Takes the console sem and the called methods then take the tty
979 * termios_rwsem and the tty ctrl_lock in that order.
981 static int vt_resize(struct tty_struct *tty, struct winsize *ws)
983 struct vc_data *vc = tty->driver_data;
987 ret = vc_do_resize(tty, vc, ws->ws_col, ws->ws_row);
992 struct vc_data *vc_deallocate(unsigned int currcons)
994 struct vc_data *vc = NULL;
996 WARN_CONSOLE_UNLOCKED();
998 if (vc_cons_allocated(currcons)) {
999 struct vt_notifier_param param;
1001 param.vc = vc = vc_cons[currcons].d;
1002 atomic_notifier_call_chain(&vt_notifier_list, VT_DEALLOCATE, ¶m);
1003 vcs_remove_sysfs(currcons);
1004 vc->vc_sw->con_deinit(vc);
1005 put_pid(vc->vt_pid);
1006 module_put(vc->vc_sw->owner);
1007 kfree(vc->vc_screenbuf);
1008 vc_cons[currcons].d = NULL;
1017 #define set_kbd(vc, x) vt_set_kbd_mode_bit((vc)->vc_num, (x))
1018 #define clr_kbd(vc, x) vt_clr_kbd_mode_bit((vc)->vc_num, (x))
1019 #define is_kbd(vc, x) vt_get_kbd_mode_bit((vc)->vc_num, (x))
1021 #define decarm VC_REPEAT
1022 #define decckm VC_CKMODE
1023 #define kbdapplic VC_APPLIC
1027 * this is what the terminal answers to a ESC-Z or csi0c query.
1029 #define VT100ID "\033[?1;2c"
1030 #define VT102ID "\033[?6c"
1032 unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7,
1033 8,12,10,14, 9,13,11,15 };
1035 /* the default colour table, for VGA+ colour systems */
1036 int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
1037 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
1038 int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
1039 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
1040 int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
1041 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
1043 module_param_array(default_red, int, NULL, S_IRUGO | S_IWUSR);
1044 module_param_array(default_grn, int, NULL, S_IRUGO | S_IWUSR);
1045 module_param_array(default_blu, int, NULL, S_IRUGO | S_IWUSR);
1048 * gotoxy() must verify all boundaries, because the arguments
1049 * might also be negative. If the given position is out of
1050 * bounds, the cursor is placed at the nearest margin.
1052 static void gotoxy(struct vc_data *vc, int new_x, int new_y)
1059 if (new_x >= vc->vc_cols)
1060 vc->vc_x = vc->vc_cols - 1;
1067 max_y = vc->vc_bottom;
1070 max_y = vc->vc_rows;
1074 else if (new_y >= max_y)
1075 vc->vc_y = max_y - 1;
1078 vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1);
1079 vc->vc_need_wrap = 0;
1082 /* for absolute user moves, when decom is set */
1083 static void gotoxay(struct vc_data *vc, int new_x, int new_y)
1085 gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y);
1088 void scrollback(struct vc_data *vc, int lines)
1091 lines = vc->vc_rows / 2;
1092 scrolldelta(-lines);
1095 void scrollfront(struct vc_data *vc, int lines)
1098 lines = vc->vc_rows / 2;
1102 static void lf(struct vc_data *vc)
1104 /* don't scroll if above bottom of scrolling region, or
1105 * if below scrolling region
1107 if (vc->vc_y + 1 == vc->vc_bottom)
1108 scrup(vc, vc->vc_top, vc->vc_bottom, 1);
1109 else if (vc->vc_y < vc->vc_rows - 1) {
1111 vc->vc_pos += vc->vc_size_row;
1113 vc->vc_need_wrap = 0;
1114 notify_write(vc, '\n');
1117 static void ri(struct vc_data *vc)
1119 /* don't scroll if below top of scrolling region, or
1120 * if above scrolling region
1122 if (vc->vc_y == vc->vc_top)
1123 scrdown(vc, vc->vc_top, vc->vc_bottom, 1);
1124 else if (vc->vc_y > 0) {
1126 vc->vc_pos -= vc->vc_size_row;
1128 vc->vc_need_wrap = 0;
1131 static inline void cr(struct vc_data *vc)
1133 vc->vc_pos -= vc->vc_x << 1;
1134 vc->vc_need_wrap = vc->vc_x = 0;
1135 notify_write(vc, '\r');
1138 static inline void bs(struct vc_data *vc)
1143 vc->vc_need_wrap = 0;
1144 notify_write(vc, '\b');
1148 static inline void del(struct vc_data *vc)
1153 static void csi_J(struct vc_data *vc, int vpar)
1156 unsigned short * start;
1159 case 0: /* erase from cursor to end of display */
1160 count = (vc->vc_scr_end - vc->vc_pos) >> 1;
1161 start = (unsigned short *)vc->vc_pos;
1163 case 1: /* erase from start to cursor */
1164 count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1;
1165 start = (unsigned short *)vc->vc_origin;
1167 case 3: /* erase scroll-back buffer (and whole display) */
1168 scr_memsetw(vc->vc_screenbuf, vc->vc_video_erase_char,
1169 vc->vc_screenbuf_size >> 1);
1171 if (CON_IS_VISIBLE(vc))
1174 case 2: /* erase whole display */
1175 count = vc->vc_cols * vc->vc_rows;
1176 start = (unsigned short *)vc->vc_origin;
1181 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1183 do_update_region(vc, (unsigned long) start, count);
1184 vc->vc_need_wrap = 0;
1187 static void csi_K(struct vc_data *vc, int vpar)
1190 unsigned short * start;
1193 case 0: /* erase from cursor to end of line */
1194 count = vc->vc_cols - vc->vc_x;
1195 start = (unsigned short *)vc->vc_pos;
1197 case 1: /* erase from start of line to cursor */
1198 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1199 count = vc->vc_x + 1;
1201 case 2: /* erase whole line */
1202 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1203 count = vc->vc_cols;
1208 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1209 vc->vc_need_wrap = 0;
1211 do_update_region(vc, (unsigned long) start, count);
1214 static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */
1220 count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar;
1222 scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count);
1224 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count);
1225 vc->vc_need_wrap = 0;
1228 static void default_attr(struct vc_data *vc)
1230 vc->vc_intensity = 1;
1232 vc->vc_underline = 0;
1235 vc->vc_color = vc->vc_def_color;
1238 struct rgb { u8 r; u8 g; u8 b; };
1240 static struct rgb rgb_from_256(int i)
1243 if (i < 8) { /* Standard colours. */
1244 c.r = i&1 ? 0xaa : 0x00;
1245 c.g = i&2 ? 0xaa : 0x00;
1246 c.b = i&4 ? 0xaa : 0x00;
1247 } else if (i < 16) {
1248 c.r = i&1 ? 0xff : 0x55;
1249 c.g = i&2 ? 0xff : 0x55;
1250 c.b = i&4 ? 0xff : 0x55;
1251 } else if (i < 232) { /* 6x6x6 colour cube. */
1252 c.r = (i - 16) / 36 * 85 / 2;
1253 c.g = (i - 16) / 6 % 6 * 85 / 2;
1254 c.b = (i - 16) % 6 * 85 / 2;
1255 } else /* Grayscale ramp. */
1256 c.r = c.g = c.b = i * 10 - 2312;
1260 static void rgb_foreground(struct vc_data *vc, struct rgb c)
1267 hue = (c.r > max/2 ? 4 : 0)
1268 | (c.g > max/2 ? 2 : 0)
1269 | (c.b > max/2 ? 1 : 0);
1270 if (hue == 7 && max <= 0x55)
1271 hue = 0, vc->vc_intensity = 2;
1273 vc->vc_intensity = (max > 0xaa) + 1;
1274 vc->vc_color = (vc->vc_color & 0xf0) | hue;
1277 static void rgb_background(struct vc_data *vc, struct rgb c)
1279 /* For backgrounds, err on the dark side. */
1280 vc->vc_color = (vc->vc_color & 0x0f)
1281 | (c.r&0x80) >> 1 | (c.g&0x80) >> 2 | (c.b&0x80) >> 3;
1284 /* console_lock is held */
1285 static void csi_m(struct vc_data *vc)
1289 for (i = 0; i <= vc->vc_npar; i++)
1290 switch (vc->vc_par[i]) {
1291 case 0: /* all attributes off */
1295 vc->vc_intensity = 2;
1298 vc->vc_intensity = 0;
1304 vc->vc_underline = 1;
1312 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1313 * Select primary font, don't display
1314 * control chars if defined, don't set
1317 vc->vc_translate = set_translate(vc->vc_charset == 0
1319 : vc->vc_G1_charset, vc);
1320 vc->vc_disp_ctrl = 0;
1321 vc->vc_toggle_meta = 0;
1323 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1324 * Select first alternate font, lets
1325 * chars < 32 be displayed as ROM chars.
1327 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1328 vc->vc_disp_ctrl = 1;
1329 vc->vc_toggle_meta = 0;
1331 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1332 * Select second alternate font, toggle
1333 * high bit before displaying as ROM char.
1335 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1336 vc->vc_disp_ctrl = 1;
1337 vc->vc_toggle_meta = 1;
1341 vc->vc_intensity = 1;
1347 vc->vc_underline = 0;
1355 case 38: /* ITU T.416
1356 * Higher colour modes.
1357 * They break the usual properties of SGR codes
1358 * and thus need to be detected and ignored by
1359 * hand. Strictly speaking, that standard also
1360 * wants : rather than ; as separators, contrary
1361 * to ECMA-48, but no one produces such codes
1362 * and almost no one accepts them.
1365 if (i > vc->vc_npar)
1367 if (vc->vc_par[i] == 5 && /* 256 colours */
1368 i < vc->vc_npar) { /* ubiquitous */
1371 rgb_from_256(vc->vc_par[i]));
1372 } else if (vc->vc_par[i] == 2 && /* 24 bit */
1373 i <= vc->vc_npar + 3) {/* extremely rare */
1375 .r = vc->vc_par[i + 1],
1376 .g = vc->vc_par[i + 2],
1377 .b = vc->vc_par[i + 3],
1379 rgb_foreground(vc, c);
1382 /* Subcommands 3 (CMY) and 4 (CMYK) are so insane
1383 * there's no point in supporting them.
1388 if (i > vc->vc_npar)
1390 if (vc->vc_par[i] == 5 && /* 256 colours */
1394 rgb_from_256(vc->vc_par[i]));
1395 } else if (vc->vc_par[i] == 2 && /* 24 bit */
1396 i <= vc->vc_npar + 3) {
1398 .r = vc->vc_par[i + 1],
1399 .g = vc->vc_par[i + 2],
1400 .b = vc->vc_par[i + 3],
1402 rgb_background(vc, c);
1407 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1410 vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f);
1413 if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37)
1414 vc->vc_color = color_table[vc->vc_par[i] - 30]
1415 | (vc->vc_color & 0xf0);
1416 else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47)
1417 vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4)
1418 | (vc->vc_color & 0x0f);
1424 static void respond_string(const char *p, struct tty_port *port)
1427 tty_insert_flip_char(port, *p, 0);
1430 tty_schedule_flip(port);
1433 static void cursor_report(struct vc_data *vc, struct tty_struct *tty)
1437 sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1);
1438 respond_string(buf, tty->port);
1441 static inline void status_report(struct tty_struct *tty)
1443 respond_string("\033[0n", tty->port); /* Terminal ok */
1446 static inline void respond_ID(struct tty_struct *tty)
1448 respond_string(VT102ID, tty->port);
1451 void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry)
1455 sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx),
1457 respond_string(buf, tty->port);
1460 /* invoked via ioctl(TIOCLINUX) and through set_selection */
1461 int mouse_reporting(void)
1463 return vc_cons[fg_console].d->vc_report_mouse;
1466 /* console_lock is held */
1467 static void set_mode(struct vc_data *vc, int on_off)
1471 for (i = 0; i <= vc->vc_npar; i++)
1473 switch(vc->vc_par[i]) { /* DEC private modes set/reset */
1474 case 1: /* Cursor keys send ^[Ox/^[[x */
1476 set_kbd(vc, decckm);
1478 clr_kbd(vc, decckm);
1480 case 3: /* 80/132 mode switch unimplemented */
1481 vc->vc_deccolm = on_off;
1483 vc_resize(deccolm ? 132 : 80, vc->vc_rows);
1484 /* this alone does not suffice; some user mode
1485 utility has to change the hardware regs */
1488 case 5: /* Inverted screen on/off */
1489 if (vc->vc_decscnm != on_off) {
1490 vc->vc_decscnm = on_off;
1491 invert_screen(vc, 0, vc->vc_screenbuf_size, 0);
1495 case 6: /* Origin relative/absolute */
1496 vc->vc_decom = on_off;
1499 case 7: /* Autowrap on/off */
1500 vc->vc_decawm = on_off;
1502 case 8: /* Autorepeat on/off */
1504 set_kbd(vc, decarm);
1506 clr_kbd(vc, decarm);
1509 vc->vc_report_mouse = on_off ? 1 : 0;
1511 case 25: /* Cursor on/off */
1512 vc->vc_deccm = on_off;
1515 vc->vc_report_mouse = on_off ? 2 : 0;
1519 switch(vc->vc_par[i]) { /* ANSI modes set/reset */
1520 case 3: /* Monitor (display ctrls) */
1521 vc->vc_disp_ctrl = on_off;
1523 case 4: /* Insert Mode on/off */
1524 vc->vc_decim = on_off;
1526 case 20: /* Lf, Enter == CrLf/Lf */
1536 /* console_lock is held */
1537 static void setterm_command(struct vc_data *vc)
1539 switch(vc->vc_par[0]) {
1540 case 1: /* set color for underline mode */
1541 if (vc->vc_can_do_color &&
1542 vc->vc_par[1] < 16) {
1543 vc->vc_ulcolor = color_table[vc->vc_par[1]];
1544 if (vc->vc_underline)
1548 case 2: /* set color for half intensity mode */
1549 if (vc->vc_can_do_color &&
1550 vc->vc_par[1] < 16) {
1551 vc->vc_halfcolor = color_table[vc->vc_par[1]];
1552 if (vc->vc_intensity == 0)
1556 case 8: /* store colors as defaults */
1557 vc->vc_def_color = vc->vc_attr;
1558 if (vc->vc_hi_font_mask == 0x100)
1559 vc->vc_def_color >>= 1;
1563 case 9: /* set blanking interval */
1564 blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60;
1565 poke_blanked_console();
1567 case 10: /* set bell frequency in Hz */
1568 if (vc->vc_npar >= 1)
1569 vc->vc_bell_pitch = vc->vc_par[1];
1571 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1573 case 11: /* set bell duration in msec */
1574 if (vc->vc_npar >= 1)
1575 vc->vc_bell_duration = (vc->vc_par[1] < 2000) ?
1576 msecs_to_jiffies(vc->vc_par[1]) : 0;
1578 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1580 case 12: /* bring specified console to the front */
1581 if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1))
1582 set_console(vc->vc_par[1] - 1);
1584 case 13: /* unblank the screen */
1585 poke_blanked_console();
1587 case 14: /* set vesa powerdown interval */
1588 vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1590 case 15: /* activate the previous console */
1591 set_console(last_console);
1596 /* console_lock is held */
1597 static void csi_at(struct vc_data *vc, unsigned int nr)
1599 if (nr > vc->vc_cols - vc->vc_x)
1600 nr = vc->vc_cols - vc->vc_x;
1603 insert_char(vc, nr);
1606 /* console_lock is held */
1607 static void csi_L(struct vc_data *vc, unsigned int nr)
1609 if (nr > vc->vc_rows - vc->vc_y)
1610 nr = vc->vc_rows - vc->vc_y;
1613 scrdown(vc, vc->vc_y, vc->vc_bottom, nr);
1614 vc->vc_need_wrap = 0;
1617 /* console_lock is held */
1618 static void csi_P(struct vc_data *vc, unsigned int nr)
1620 if (nr > vc->vc_cols - vc->vc_x)
1621 nr = vc->vc_cols - vc->vc_x;
1624 delete_char(vc, nr);
1627 /* console_lock is held */
1628 static void csi_M(struct vc_data *vc, unsigned int nr)
1630 if (nr > vc->vc_rows - vc->vc_y)
1631 nr = vc->vc_rows - vc->vc_y;
1634 scrup(vc, vc->vc_y, vc->vc_bottom, nr);
1635 vc->vc_need_wrap = 0;
1638 /* console_lock is held (except via vc_init->reset_terminal */
1639 static void save_cur(struct vc_data *vc)
1641 vc->vc_saved_x = vc->vc_x;
1642 vc->vc_saved_y = vc->vc_y;
1643 vc->vc_s_intensity = vc->vc_intensity;
1644 vc->vc_s_italic = vc->vc_italic;
1645 vc->vc_s_underline = vc->vc_underline;
1646 vc->vc_s_blink = vc->vc_blink;
1647 vc->vc_s_reverse = vc->vc_reverse;
1648 vc->vc_s_charset = vc->vc_charset;
1649 vc->vc_s_color = vc->vc_color;
1650 vc->vc_saved_G0 = vc->vc_G0_charset;
1651 vc->vc_saved_G1 = vc->vc_G1_charset;
1654 /* console_lock is held */
1655 static void restore_cur(struct vc_data *vc)
1657 gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y);
1658 vc->vc_intensity = vc->vc_s_intensity;
1659 vc->vc_italic = vc->vc_s_italic;
1660 vc->vc_underline = vc->vc_s_underline;
1661 vc->vc_blink = vc->vc_s_blink;
1662 vc->vc_reverse = vc->vc_s_reverse;
1663 vc->vc_charset = vc->vc_s_charset;
1664 vc->vc_color = vc->vc_s_color;
1665 vc->vc_G0_charset = vc->vc_saved_G0;
1666 vc->vc_G1_charset = vc->vc_saved_G1;
1667 vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc);
1669 vc->vc_need_wrap = 0;
1672 enum { ESnormal, ESesc, ESsquare, ESgetpars, ESfunckey,
1673 EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd,
1676 /* console_lock is held (except via vc_init()) */
1677 static void reset_terminal(struct vc_data *vc, int do_clear)
1680 vc->vc_bottom = vc->vc_rows;
1681 vc->vc_state = ESnormal;
1683 vc->vc_translate = set_translate(LAT1_MAP, vc);
1684 vc->vc_G0_charset = LAT1_MAP;
1685 vc->vc_G1_charset = GRAF_MAP;
1687 vc->vc_need_wrap = 0;
1688 vc->vc_report_mouse = 0;
1689 vc->vc_utf = default_utf8;
1690 vc->vc_utf_count = 0;
1692 vc->vc_disp_ctrl = 0;
1693 vc->vc_toggle_meta = 0;
1698 vc->vc_deccm = global_cursor_default;
1701 vt_reset_keyboard(vc->vc_num);
1703 vc->vc_cursor_type = cur_default;
1704 vc->vc_complement_mask = vc->vc_s_complement_mask;
1709 vc->vc_tab_stop[0] = 0x01010100;
1710 vc->vc_tab_stop[1] =
1711 vc->vc_tab_stop[2] =
1712 vc->vc_tab_stop[3] =
1713 vc->vc_tab_stop[4] =
1714 vc->vc_tab_stop[5] =
1715 vc->vc_tab_stop[6] =
1716 vc->vc_tab_stop[7] = 0x01010101;
1718 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1719 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1727 /* console_lock is held */
1728 static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
1731 * Control characters can be used in the _middle_
1732 * of an escape sequence.
1734 if (vc->vc_state == ESosc && c>=8 && c<=13) /* ... except for OSC */
1740 if (vc->vc_state == ESosc)
1741 vc->vc_state = ESnormal;
1742 else if (vc->vc_bell_duration)
1743 kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration);
1749 vc->vc_pos -= (vc->vc_x << 1);
1750 while (vc->vc_x < vc->vc_cols - 1) {
1752 if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31)))
1755 vc->vc_pos += (vc->vc_x << 1);
1756 notify_write(vc, '\t');
1758 case 10: case 11: case 12:
1760 if (!is_kbd(vc, lnm))
1767 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1768 vc->vc_disp_ctrl = 1;
1772 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1773 vc->vc_disp_ctrl = 0;
1776 vc->vc_state = ESnormal;
1779 vc->vc_state = ESesc;
1785 vc->vc_state = ESsquare;
1788 switch(vc->vc_state) {
1790 vc->vc_state = ESnormal;
1793 vc->vc_state = ESsquare;
1796 vc->vc_state = ESnonstd;
1799 vc->vc_state = ESpercent;
1812 vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31));
1824 vc->vc_state = ESsetG0;
1827 vc->vc_state = ESsetG1;
1830 vc->vc_state = EShash;
1833 reset_terminal(vc, 1);
1835 case '>': /* Numeric keypad */
1836 clr_kbd(vc, kbdapplic);
1838 case '=': /* Appl. keypad */
1839 set_kbd(vc, kbdapplic);
1844 if (c=='P') { /* palette escape sequence */
1845 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1846 vc->vc_par[vc->vc_npar] = 0;
1848 vc->vc_state = ESpalette;
1850 } else if (c=='R') { /* reset palette */
1852 vc->vc_state = ESnormal;
1853 } else if (c>='0' && c<='9')
1854 vc->vc_state = ESosc;
1856 vc->vc_state = ESnormal;
1860 vc->vc_par[vc->vc_npar++] = hex_to_bin(c);
1861 if (vc->vc_npar == 7) {
1862 int i = vc->vc_par[0] * 3, j = 1;
1863 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1864 vc->vc_palette[i++] += vc->vc_par[j++];
1865 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1866 vc->vc_palette[i++] += vc->vc_par[j++];
1867 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1868 vc->vc_palette[i] += vc->vc_par[j];
1870 vc->vc_state = ESnormal;
1873 vc->vc_state = ESnormal;
1876 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1877 vc->vc_par[vc->vc_npar] = 0;
1879 vc->vc_state = ESgetpars;
1880 if (c == '[') { /* Function key */
1881 vc->vc_state=ESfunckey;
1884 vc->vc_ques = (c == '?');
1888 if (c == ';' && vc->vc_npar < NPAR - 1) {
1891 } else if (c>='0' && c<='9') {
1892 vc->vc_par[vc->vc_npar] *= 10;
1893 vc->vc_par[vc->vc_npar] += c - '0';
1896 vc->vc_state = ESnormal;
1907 vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16);
1909 vc->vc_cursor_type = cur_default;
1917 vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1];
1919 vc->vc_complement_mask = vc->vc_s_complement_mask;
1925 if (vc->vc_par[0] == 5)
1927 else if (vc->vc_par[0] == 6)
1928 cursor_report(vc, tty);
1940 gotoxy(vc, vc->vc_par[0], vc->vc_y);
1945 gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]);
1950 gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]);
1955 gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y);
1960 gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y);
1965 gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]);
1970 gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]);
1975 gotoxay(vc, vc->vc_x ,vc->vc_par[0]);
1982 gotoxay(vc, vc->vc_par[1], vc->vc_par[0]);
1985 csi_J(vc, vc->vc_par[0]);
1988 csi_K(vc, vc->vc_par[0]);
1991 csi_L(vc, vc->vc_par[0]);
1994 csi_M(vc, vc->vc_par[0]);
1997 csi_P(vc, vc->vc_par[0]);
2005 vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31));
2006 else if (vc->vc_par[0] == 3) {
2007 vc->vc_tab_stop[0] =
2008 vc->vc_tab_stop[1] =
2009 vc->vc_tab_stop[2] =
2010 vc->vc_tab_stop[3] =
2011 vc->vc_tab_stop[4] =
2012 vc->vc_tab_stop[5] =
2013 vc->vc_tab_stop[6] =
2014 vc->vc_tab_stop[7] = 0;
2020 case 'q': /* DECLL - but only 3 leds */
2021 /* map 0,1,2,3 to 0,1,2,4 */
2022 if (vc->vc_par[0] < 4)
2023 vt_set_led_state(vc->vc_num,
2024 (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4);
2030 vc->vc_par[1] = vc->vc_rows;
2031 /* Minimum allowed region is 2 lines */
2032 if (vc->vc_par[0] < vc->vc_par[1] &&
2033 vc->vc_par[1] <= vc->vc_rows) {
2034 vc->vc_top = vc->vc_par[0] - 1;
2035 vc->vc_bottom = vc->vc_par[1];
2046 csi_X(vc, vc->vc_par[0]);
2049 csi_at(vc, vc->vc_par[0]);
2051 case ']': /* setterm functions */
2052 setterm_command(vc);
2057 vc->vc_state = ESnormal;
2059 case '@': /* defined in ISO 2022 */
2062 case 'G': /* prelim official escape code */
2063 case '8': /* retained for compatibility */
2069 vc->vc_state = ESnormal;
2072 vc->vc_state = ESnormal;
2074 /* DEC screen alignment test. kludge :-) */
2075 vc->vc_video_erase_char =
2076 (vc->vc_video_erase_char & 0xff00) | 'E';
2078 vc->vc_video_erase_char =
2079 (vc->vc_video_erase_char & 0xff00) | ' ';
2080 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
2085 vc->vc_G0_charset = GRAF_MAP;
2087 vc->vc_G0_charset = LAT1_MAP;
2089 vc->vc_G0_charset = IBMPC_MAP;
2091 vc->vc_G0_charset = USER_MAP;
2092 if (vc->vc_charset == 0)
2093 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
2094 vc->vc_state = ESnormal;
2098 vc->vc_G1_charset = GRAF_MAP;
2100 vc->vc_G1_charset = LAT1_MAP;
2102 vc->vc_G1_charset = IBMPC_MAP;
2104 vc->vc_G1_charset = USER_MAP;
2105 if (vc->vc_charset == 1)
2106 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
2107 vc->vc_state = ESnormal;
2112 vc->vc_state = ESnormal;
2116 /* is_double_width() is based on the wcwidth() implementation by
2117 * Markus Kuhn -- 2007-05-26 (Unicode 5.0)
2118 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
2125 static int bisearch(uint32_t ucs, const struct interval *table, int max)
2130 if (ucs < table[0].first || ucs > table[max].last)
2132 while (max >= min) {
2133 mid = (min + max) / 2;
2134 if (ucs > table[mid].last)
2136 else if (ucs < table[mid].first)
2144 static int is_double_width(uint32_t ucs)
2146 static const struct interval double_width[] = {
2147 { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E },
2148 { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF },
2149 { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 },
2150 { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD }
2152 return bisearch(ucs, double_width, ARRAY_SIZE(double_width) - 1);
2155 /* acquires console_lock */
2156 static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2158 #ifdef VT_BUF_VRAM_ONLY
2159 #define FLUSH do { } while(0);
2161 #define FLUSH if (draw_x >= 0) { \
2162 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
2167 int c, tc, ok, n = 0, draw_x = -1;
2168 unsigned int currcons;
2169 unsigned long draw_from = 0, draw_to = 0;
2171 unsigned char vc_attr;
2172 struct vt_notifier_param param;
2176 u16 himask, charmask;
2184 vc = tty->driver_data;
2186 printk(KERN_ERR "vt: argh, driver_data is NULL !\n");
2191 currcons = vc->vc_num;
2192 if (!vc_cons_allocated(currcons)) {
2193 /* could this happen? */
2194 pr_warn_once("con_write: tty %d not allocated\n", currcons+1);
2199 himask = vc->vc_hi_font_mask;
2200 charmask = himask ? 0x1ff : 0xff;
2202 /* undraw cursor first */
2208 while (!tty->stopped && count) {
2218 /* Do no translation at all in control states */
2219 if (vc->vc_state != ESnormal) {
2221 } else if (vc->vc_utf && !vc->vc_disp_ctrl) {
2222 /* Combine UTF-8 into Unicode in vc_utf_char.
2223 * vc_utf_count is the number of continuation bytes still
2224 * expected to arrive.
2225 * vc_npar is the number of continuation bytes arrived so
2229 if ((c & 0xc0) == 0x80) {
2230 /* Continuation byte received */
2231 static const uint32_t utf8_length_changes[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff };
2232 if (vc->vc_utf_count) {
2233 vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f);
2235 if (--vc->vc_utf_count) {
2236 /* Still need some bytes */
2239 /* Got a whole character */
2240 c = vc->vc_utf_char;
2241 /* Reject overlong sequences */
2242 if (c <= utf8_length_changes[vc->vc_npar - 1] ||
2243 c > utf8_length_changes[vc->vc_npar])
2246 /* Unexpected continuation byte */
2247 vc->vc_utf_count = 0;
2251 /* Single ASCII byte or first byte of a sequence received */
2252 if (vc->vc_utf_count) {
2253 /* Continuation byte expected */
2255 vc->vc_utf_count = 0;
2257 } else if (c > 0x7f) {
2258 /* First byte of a multibyte sequence received */
2260 if ((c & 0xe0) == 0xc0) {
2261 vc->vc_utf_count = 1;
2262 vc->vc_utf_char = (c & 0x1f);
2263 } else if ((c & 0xf0) == 0xe0) {
2264 vc->vc_utf_count = 2;
2265 vc->vc_utf_char = (c & 0x0f);
2266 } else if ((c & 0xf8) == 0xf0) {
2267 vc->vc_utf_count = 3;
2268 vc->vc_utf_char = (c & 0x07);
2269 } else if ((c & 0xfc) == 0xf8) {
2270 vc->vc_utf_count = 4;
2271 vc->vc_utf_char = (c & 0x03);
2272 } else if ((c & 0xfe) == 0xfc) {
2273 vc->vc_utf_count = 5;
2274 vc->vc_utf_char = (c & 0x01);
2276 /* 254 and 255 are invalid */
2279 if (vc->vc_utf_count) {
2280 /* Still need some bytes */
2284 /* Nothing to do if an ASCII byte was received */
2286 /* End of UTF-8 decoding. */
2287 /* c is the received character, or U+FFFD for invalid sequences. */
2288 /* Replace invalid Unicode code points with U+FFFD too */
2289 if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff)
2292 } else { /* no utf or alternate charset mode */
2293 tc = vc_translate(vc, c);
2297 if (atomic_notifier_call_chain(&vt_notifier_list, VT_PREWRITE,
2298 ¶m) == NOTIFY_STOP)
2301 /* If the original code was a control character we
2302 * only allow a glyph to be displayed if the code is
2303 * not normally used (such as for cursor movement) or
2304 * if the disp_ctrl mode has been explicitly enabled.
2305 * Certain characters (as given by the CTRL_ALWAYS
2306 * bitmap) are always displayed as control characters,
2307 * as the console would be pretty useless without
2308 * them; to display an arbitrary font position use the
2309 * direct-to-font zone in UTF-8 mode.
2311 ok = tc && (c >= 32 ||
2312 !(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 :
2313 vc->vc_utf || ((CTRL_ACTION >> c) & 1)))
2314 && (c != 127 || vc->vc_disp_ctrl)
2317 if (vc->vc_state == ESnormal && ok) {
2318 if (vc->vc_utf && !vc->vc_disp_ctrl) {
2319 if (is_double_width(c))
2322 /* Now try to find out how to display it */
2323 tc = conv_uni_to_pc(vc, tc);
2324 if (tc & ~charmask) {
2325 if (tc == -1 || tc == -2) {
2326 continue; /* nothing to display */
2328 /* Glyph not found */
2329 if ((!(vc->vc_utf && !vc->vc_disp_ctrl) || c < 128) && !(c & ~charmask)) {
2330 /* In legacy mode use the glyph we get by a 1:1 mapping.
2331 This would make absolutely no sense with Unicode in mind,
2332 but do this for ASCII characters since a font may lack
2333 Unicode mapping info and we don't want to end up with
2334 having question marks only. */
2337 /* Display U+FFFD. If it's not found, display an inverse question mark. */
2338 tc = conv_uni_to_pc(vc, 0xfffd);
2341 tc = conv_uni_to_pc(vc, '?');
2342 if (tc < 0) tc = '?';
2348 vc_attr = vc->vc_attr;
2350 /* invert vc_attr */
2351 if (!vc->vc_can_do_color) {
2352 vc_attr = (vc->vc_attr) ^ 0x08;
2353 } else if (vc->vc_hi_font_mask == 0x100) {
2354 vc_attr = ((vc->vc_attr) & 0x11) | (((vc->vc_attr) & 0xe0) >> 4) | (((vc->vc_attr) & 0x0e) << 4);
2356 vc_attr = ((vc->vc_attr) & 0x88) | (((vc->vc_attr) & 0x70) >> 4) | (((vc->vc_attr) & 0x07) << 4);
2362 if (vc->vc_need_wrap || vc->vc_decim)
2364 if (vc->vc_need_wrap) {
2371 ((vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) :
2372 (vc_attr << 8) + tc,
2373 (u16 *) vc->vc_pos);
2374 if (DO_UPDATE(vc) && draw_x < 0) {
2376 draw_from = vc->vc_pos;
2378 if (vc->vc_x == vc->vc_cols - 1) {
2379 vc->vc_need_wrap = vc->vc_decawm;
2380 draw_to = vc->vc_pos + 2;
2383 draw_to = (vc->vc_pos += 2);
2386 if (!--width) break;
2388 tc = conv_uni_to_pc(vc, ' '); /* A space is printed in the second column */
2389 if (tc < 0) tc = ' ';
2391 notify_write(vc, c);
2402 goto rescan_last_byte;
2407 do_con_trol(tty, vc, orig);
2410 console_conditional_schedule();
2418 * This is the console switching callback.
2420 * Doing console switching in a process context allows
2421 * us to do the switches asynchronously (needed when we want
2422 * to switch due to a keyboard interrupt). Synchronization
2423 * with other console code and prevention of re-entrancy is
2424 * ensured with console_lock.
2426 static void console_callback(struct work_struct *ignored)
2430 if (want_console >= 0) {
2431 if (want_console != fg_console &&
2432 vc_cons_allocated(want_console)) {
2433 hide_cursor(vc_cons[fg_console].d);
2434 change_console(vc_cons[want_console].d);
2435 /* we only changed when the console had already
2436 been allocated - a new console is not created
2437 in an interrupt routine */
2441 if (do_poke_blanked_console) { /* do not unblank for a LED change */
2442 do_poke_blanked_console = 0;
2443 poke_blanked_console();
2445 if (scrollback_delta) {
2446 struct vc_data *vc = vc_cons[fg_console].d;
2448 if (vc->vc_mode == KD_TEXT)
2449 vc->vc_sw->con_scrolldelta(vc, scrollback_delta);
2450 scrollback_delta = 0;
2452 if (blank_timer_expired) {
2454 blank_timer_expired = 0;
2456 notify_update(vc_cons[fg_console].d);
2461 int set_console(int nr)
2463 struct vc_data *vc = vc_cons[fg_console].d;
2465 if (!vc_cons_allocated(nr) || vt_dont_switch ||
2466 (vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) {
2469 * Console switch will fail in console_callback() or
2470 * change_console() so there is no point scheduling
2473 * Existing set_console() users don't check the return
2474 * value so this shouldn't break anything
2480 schedule_console_callback();
2485 struct tty_driver *console_driver;
2487 #ifdef CONFIG_VT_CONSOLE
2490 * vt_kmsg_redirect() - Sets/gets the kernel message console
2491 * @new: The new virtual terminal number or -1 if the console should stay
2494 * By default, the kernel messages are always printed on the current virtual
2495 * console. However, the user may modify that default with the
2496 * TIOCL_SETKMSGREDIRECT ioctl call.
2498 * This function sets the kernel message console to be @new. It returns the old
2499 * virtual console number. The virtual terminal number 0 (both as parameter and
2500 * return value) means no redirection (i.e. always printed on the currently
2503 * The parameter -1 means that only the current console is returned, but the
2504 * value is not modified. You may use the macro vt_get_kmsg_redirect() in that
2505 * case to make the code more understandable.
2507 * When the kernel is compiled without CONFIG_VT_CONSOLE, this function ignores
2508 * the parameter and always returns 0.
2510 int vt_kmsg_redirect(int new)
2512 static int kmsg_con;
2515 return xchg(&kmsg_con, new);
2521 * Console on virtual terminal
2523 * The console must be locked when we get here.
2526 static void vt_console_print(struct console *co, const char *b, unsigned count)
2528 struct vc_data *vc = vc_cons[fg_console].d;
2530 static DEFINE_SPINLOCK(printing_lock);
2531 const ushort *start;
2536 /* console busy or not yet initialized */
2539 if (!spin_trylock(&printing_lock))
2542 kmsg_console = vt_get_kmsg_redirect();
2543 if (kmsg_console && vc_cons_allocated(kmsg_console - 1))
2544 vc = vc_cons[kmsg_console - 1].d;
2546 /* read `x' only after setting currcons properly (otherwise
2547 the `x' macro will read the x of the foreground console). */
2550 if (!vc_cons_allocated(fg_console)) {
2552 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2556 if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc))
2559 /* undraw cursor first */
2563 start = (ushort *)vc->vc_pos;
2565 /* Contrived structure to try to emulate original need_wrap behaviour
2566 * Problems caused when we have need_wrap set on '\n' character */
2569 if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) {
2571 if (CON_IS_VISIBLE(vc))
2572 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2574 if (vc->vc_need_wrap)
2578 if (c == 8) { /* backspace */
2580 start = (ushort *)vc->vc_pos;
2587 start = (ushort *)vc->vc_pos;
2589 if (c == 10 || c == 13)
2592 scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos);
2593 notify_write(vc, c);
2595 if (myx == vc->vc_cols - 1) {
2596 vc->vc_need_wrap = 1;
2603 if (CON_IS_VISIBLE(vc))
2604 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2606 if (vc->vc_x == vc->vc_cols) {
2608 vc->vc_need_wrap = 1;
2615 spin_unlock(&printing_lock);
2618 static struct tty_driver *vt_console_device(struct console *c, int *index)
2620 *index = c->index ? c->index-1 : fg_console;
2621 return console_driver;
2624 static struct console vt_console_driver = {
2626 .write = vt_console_print,
2627 .device = vt_console_device,
2628 .unblank = unblank_screen,
2629 .flags = CON_PRINTBUFFER,
2635 * Handling of Linux-specific VC ioctls
2639 * Generally a bit racy with respect to console_lock();.
2641 * There are some functions which don't need it.
2643 * There are some functions which can sleep for arbitrary periods
2644 * (paste_selection) but we don't need the lock there anyway.
2646 * set_selection has locking, and definitely needs it
2649 int tioclinux(struct tty_struct *tty, unsigned long arg)
2652 char __user *p = (char __user *)arg;
2656 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN))
2658 if (get_user(type, p))
2666 ret = set_selection((struct tiocl_selection __user *)(p+1), tty);
2669 case TIOCL_PASTESEL:
2670 ret = paste_selection(tty);
2672 case TIOCL_UNBLANKSCREEN:
2677 case TIOCL_SELLOADLUT:
2679 ret = sel_loadlut(p);
2682 case TIOCL_GETSHIFTSTATE:
2685 * Make it possible to react to Shift+Mousebutton.
2686 * Note that 'shift_state' is an undocumented
2687 * kernel-internal variable; programs not closely
2688 * related to the kernel should not use this.
2690 data = vt_get_shift_state();
2691 ret = __put_user(data, p);
2693 case TIOCL_GETMOUSEREPORTING:
2694 console_lock(); /* May be overkill */
2695 data = mouse_reporting();
2697 ret = __put_user(data, p);
2699 case TIOCL_SETVESABLANK:
2701 ret = set_vesa_blanking(p);
2704 case TIOCL_GETKMSGREDIRECT:
2705 data = vt_get_kmsg_redirect();
2706 ret = __put_user(data, p);
2708 case TIOCL_SETKMSGREDIRECT:
2709 if (!capable(CAP_SYS_ADMIN)) {
2712 if (get_user(data, p+1))
2715 vt_kmsg_redirect(data);
2718 case TIOCL_GETFGCONSOLE:
2719 /* No locking needed as this is a transiently
2720 correct return anyway if the caller hasn't
2721 disabled switching */
2724 case TIOCL_SCROLLCONSOLE:
2725 if (get_user(lines, (s32 __user *)(p+4))) {
2728 /* Need the console lock here. Note that lots
2729 of other calls need fixing before the lock
2730 is actually useful ! */
2732 scrollfront(vc_cons[fg_console].d, lines);
2737 case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
2743 case TIOCL_BLANKEDSCREEN:
2744 ret = console_blanked;
2754 * /dev/ttyN handling
2757 static int con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2761 retval = do_con_write(tty, buf, count);
2762 con_flush_chars(tty);
2767 static int con_put_char(struct tty_struct *tty, unsigned char ch)
2770 return 0; /* n_r3964 calls put_char() from interrupt context */
2771 return do_con_write(tty, &ch, 1);
2774 static int con_write_room(struct tty_struct *tty)
2778 return 32768; /* No limit, really; we're not buffering */
2781 static int con_chars_in_buffer(struct tty_struct *tty)
2783 return 0; /* we're not buffering */
2787 * con_throttle and con_unthrottle are only used for
2788 * paste_selection(), which has to stuff in a large number of
2791 static void con_throttle(struct tty_struct *tty)
2795 static void con_unthrottle(struct tty_struct *tty)
2797 struct vc_data *vc = tty->driver_data;
2799 wake_up_interruptible(&vc->paste_wait);
2803 * Turn the Scroll-Lock LED on when the tty is stopped
2805 static void con_stop(struct tty_struct *tty)
2810 console_num = tty->index;
2811 if (!vc_cons_allocated(console_num))
2813 vt_kbd_con_stop(console_num);
2817 * Turn the Scroll-Lock LED off when the console is started
2819 static void con_start(struct tty_struct *tty)
2824 console_num = tty->index;
2825 if (!vc_cons_allocated(console_num))
2827 vt_kbd_con_start(console_num);
2830 static void con_flush_chars(struct tty_struct *tty)
2834 if (in_interrupt()) /* from flush_to_ldisc */
2837 /* if we race with con_close(), vt may be null */
2839 vc = tty->driver_data;
2846 * Allocate the console screen memory.
2848 static int con_install(struct tty_driver *driver, struct tty_struct *tty)
2850 unsigned int currcons = tty->index;
2855 ret = vc_allocate(currcons);
2859 vc = vc_cons[currcons].d;
2861 /* Still being freed */
2867 ret = tty_port_install(&vc->port, driver, tty);
2871 tty->driver_data = vc;
2874 if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
2875 tty->winsize.ws_row = vc_cons[currcons].d->vc_rows;
2876 tty->winsize.ws_col = vc_cons[currcons].d->vc_cols;
2879 tty->termios.c_iflag |= IUTF8;
2881 tty->termios.c_iflag &= ~IUTF8;
2887 static int con_open(struct tty_struct *tty, struct file *filp)
2889 /* everything done in install */
2894 static void con_close(struct tty_struct *tty, struct file *filp)
2896 /* Nothing to do - we defer to shutdown */
2899 static void con_shutdown(struct tty_struct *tty)
2901 struct vc_data *vc = tty->driver_data;
2904 vc->port.tty = NULL;
2908 static int default_color = 7; /* white */
2909 static int default_italic_color = 2; // green (ASCII)
2910 static int default_underline_color = 3; // cyan (ASCII)
2911 module_param_named(color, default_color, int, S_IRUGO | S_IWUSR);
2912 module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR);
2913 module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR);
2915 static void vc_init(struct vc_data *vc, unsigned int rows,
2916 unsigned int cols, int do_clear)
2922 vc->vc_size_row = cols << 1;
2923 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
2926 vc->vc_pos = vc->vc_origin;
2928 for (j=k=0; j<16; j++) {
2929 vc->vc_palette[k++] = default_red[j] ;
2930 vc->vc_palette[k++] = default_grn[j] ;
2931 vc->vc_palette[k++] = default_blu[j] ;
2933 vc->vc_def_color = default_color;
2934 vc->vc_ulcolor = default_underline_color;
2935 vc->vc_itcolor = default_italic_color;
2936 vc->vc_halfcolor = 0x08; /* grey */
2937 init_waitqueue_head(&vc->paste_wait);
2938 reset_terminal(vc, do_clear);
2942 * This routine initializes console interrupts, and does nothing
2943 * else. If you want the screen to clear, call tty_write with
2944 * the appropriate escape-sequence.
2947 static int __init con_init(void)
2949 const char *display_desc = NULL;
2951 unsigned int currcons = 0, i;
2956 display_desc = conswitchp->con_startup();
2957 if (!display_desc) {
2963 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2964 struct con_driver *con_driver = ®istered_con_driver[i];
2966 if (con_driver->con == NULL) {
2967 con_driver->con = conswitchp;
2968 con_driver->desc = display_desc;
2969 con_driver->flag = CON_DRIVER_FLAG_INIT;
2970 con_driver->first = 0;
2971 con_driver->last = MAX_NR_CONSOLES - 1;
2976 for (i = 0; i < MAX_NR_CONSOLES; i++)
2977 con_driver_map[i] = conswitchp;
2979 if (blankinterval) {
2980 blank_state = blank_normal_wait;
2981 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
2984 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) {
2985 vc_cons[currcons].d = vc = kzalloc(sizeof(struct vc_data), GFP_NOWAIT);
2986 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
2987 tty_port_init(&vc->port);
2988 visual_init(vc, currcons, 1);
2989 vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_NOWAIT);
2990 vc_init(vc, vc->vc_rows, vc->vc_cols,
2991 currcons || !vc->vc_sw->con_save_screen);
2993 currcons = fg_console = 0;
2994 master_display_fg = vc = vc_cons[currcons].d;
2997 gotoxy(vc, vc->vc_x, vc->vc_y);
3000 pr_info("Console: %s %s %dx%d\n",
3001 vc->vc_can_do_color ? "colour" : "mono",
3002 display_desc, vc->vc_cols, vc->vc_rows);
3007 #ifdef CONFIG_VT_CONSOLE
3008 register_console(&vt_console_driver);
3012 console_initcall(con_init);
3014 static const struct tty_operations con_ops = {
3015 .install = con_install,
3019 .write_room = con_write_room,
3020 .put_char = con_put_char,
3021 .flush_chars = con_flush_chars,
3022 .chars_in_buffer = con_chars_in_buffer,
3024 #ifdef CONFIG_COMPAT
3025 .compat_ioctl = vt_compat_ioctl,
3029 .throttle = con_throttle,
3030 .unthrottle = con_unthrottle,
3031 .resize = vt_resize,
3032 .shutdown = con_shutdown
3035 static struct cdev vc0_cdev;
3037 static ssize_t show_tty_active(struct device *dev,
3038 struct device_attribute *attr, char *buf)
3040 return sprintf(buf, "tty%d\n", fg_console + 1);
3042 static DEVICE_ATTR(active, S_IRUGO, show_tty_active, NULL);
3044 int __init vty_init(const struct file_operations *console_fops)
3046 cdev_init(&vc0_cdev, console_fops);
3047 if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) ||
3048 register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0)
3049 panic("Couldn't register /dev/tty0 driver\n");
3050 tty0dev = device_create(tty_class, NULL, MKDEV(TTY_MAJOR, 0), NULL, "tty0");
3051 if (IS_ERR(tty0dev))
3054 WARN_ON(device_create_file(tty0dev, &dev_attr_active) < 0);
3058 console_driver = alloc_tty_driver(MAX_NR_CONSOLES);
3059 if (!console_driver)
3060 panic("Couldn't allocate console driver\n");
3062 console_driver->name = "tty";
3063 console_driver->name_base = 1;
3064 console_driver->major = TTY_MAJOR;
3065 console_driver->minor_start = 1;
3066 console_driver->type = TTY_DRIVER_TYPE_CONSOLE;
3067 console_driver->init_termios = tty_std_termios;
3069 console_driver->init_termios.c_iflag |= IUTF8;
3070 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS;
3071 tty_set_operations(console_driver, &con_ops);
3072 if (tty_register_driver(console_driver))
3073 panic("Couldn't register console driver\n");
3076 #ifdef CONFIG_MDA_CONSOLE
3082 #ifndef VT_SINGLE_DRIVER
3084 static struct class *vtconsole_class;
3086 static int do_bind_con_driver(const struct consw *csw, int first, int last,
3089 struct module *owner = csw->owner;
3090 const char *desc = NULL;
3091 struct con_driver *con_driver;
3092 int i, j = -1, k = -1, retval = -ENODEV;
3094 if (!try_module_get(owner))
3097 WARN_CONSOLE_UNLOCKED();
3099 /* check if driver is registered */
3100 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3101 con_driver = ®istered_con_driver[i];
3103 if (con_driver->con == csw) {
3104 desc = con_driver->desc;
3113 if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) {
3115 con_driver->flag |= CON_DRIVER_FLAG_INIT;
3120 module_put(conswitchp->owner);
3122 __module_get(owner);
3126 first = max(first, con_driver->first);
3127 last = min(last, con_driver->last);
3129 for (i = first; i <= last; i++) {
3131 struct vc_data *vc = vc_cons[i].d;
3133 if (con_driver_map[i])
3134 module_put(con_driver_map[i]->owner);
3135 __module_get(owner);
3136 con_driver_map[i] = csw;
3138 if (!vc || !vc->vc_sw)
3143 if (CON_IS_VISIBLE(vc)) {
3148 old_was_color = vc->vc_can_do_color;
3149 vc->vc_sw->con_deinit(vc);
3150 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
3151 visual_init(vc, i, 0);
3155 /* If the console changed between mono <-> color, then
3156 * the attributes in the screenbuf will be wrong. The
3157 * following resets all attributes to something sane.
3159 if (old_was_color != vc->vc_can_do_color)
3160 clear_buffer_attributes(vc);
3163 pr_info("Console: switching ");
3165 printk("consoles %d-%d ", first+1, last+1);
3167 struct vc_data *vc = vc_cons[j].d;
3169 printk("to %s %s %dx%d\n",
3170 vc->vc_can_do_color ? "colour" : "mono",
3171 desc, vc->vc_cols, vc->vc_rows);
3178 printk("to %s\n", desc);
3187 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
3188 static int con_is_graphics(const struct consw *csw, int first, int last)
3192 for (i = first; i <= last; i++) {
3193 struct vc_data *vc = vc_cons[i].d;
3195 if (vc && vc->vc_mode == KD_GRAPHICS) {
3204 /* unlocked version of unbind_con_driver() */
3205 int do_unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
3207 struct module *owner = csw->owner;
3208 const struct consw *defcsw = NULL;
3209 struct con_driver *con_driver = NULL, *con_back = NULL;
3210 int i, retval = -ENODEV;
3212 if (!try_module_get(owner))
3215 WARN_CONSOLE_UNLOCKED();
3217 /* check if driver is registered and if it is unbindable */
3218 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3219 con_driver = ®istered_con_driver[i];
3221 if (con_driver->con == csw &&
3222 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3233 /* check if backup driver exists */
3234 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3235 con_back = ®istered_con_driver[i];
3237 if (con_back->con && con_back->con != csw) {
3238 defcsw = con_back->con;
3247 if (!con_is_bound(csw))
3250 first = max(first, con_driver->first);
3251 last = min(last, con_driver->last);
3253 for (i = first; i <= last; i++) {
3254 if (con_driver_map[i] == csw) {
3255 module_put(csw->owner);
3256 con_driver_map[i] = NULL;
3260 if (!con_is_bound(defcsw)) {
3261 const struct consw *defconsw = conswitchp;
3263 defcsw->con_startup();
3264 con_back->flag |= CON_DRIVER_FLAG_INIT;
3266 * vgacon may change the default driver to point
3267 * to dummycon, we restore it here...
3269 conswitchp = defconsw;
3272 if (!con_is_bound(csw))
3273 con_driver->flag &= ~CON_DRIVER_FLAG_INIT;
3275 /* ignore return value, binding should not fail */
3276 do_bind_con_driver(defcsw, first, last, deflt);
3282 EXPORT_SYMBOL_GPL(do_unbind_con_driver);
3284 static int vt_bind(struct con_driver *con)
3286 const struct consw *defcsw = NULL, *csw = NULL;
3287 int i, more = 1, first = -1, last = -1, deflt = 0;
3289 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3290 con_is_graphics(con->con, con->first, con->last))
3295 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3296 struct con_driver *con = ®istered_con_driver[i];
3298 if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) {
3310 for (i = con->first; i <= con->last; i++) {
3311 if (con_driver_map[i] == defcsw) {
3316 } else if (first != -1)
3320 if (first == 0 && last == MAX_NR_CONSOLES -1)
3324 do_bind_con_driver(csw, first, last, deflt);
3335 static int vt_unbind(struct con_driver *con)
3337 const struct consw *csw = NULL;
3338 int i, more = 1, first = -1, last = -1, deflt = 0;
3341 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3342 con_is_graphics(con->con, con->first, con->last))
3350 for (i = con->first; i <= con->last; i++) {
3351 if (con_driver_map[i] == csw) {
3356 } else if (first != -1)
3360 if (first == 0 && last == MAX_NR_CONSOLES -1)
3364 ret = do_unbind_con_driver(csw, first, last, deflt);
3378 static inline int vt_bind(struct con_driver *con)
3382 static inline int vt_unbind(struct con_driver *con)
3386 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3388 static ssize_t store_bind(struct device *dev, struct device_attribute *attr,
3389 const char *buf, size_t count)
3391 struct con_driver *con = dev_get_drvdata(dev);
3392 int bind = simple_strtoul(buf, NULL, 0);
3406 static ssize_t show_bind(struct device *dev, struct device_attribute *attr,
3409 struct con_driver *con = dev_get_drvdata(dev);
3410 int bind = con_is_bound(con->con);
3412 return snprintf(buf, PAGE_SIZE, "%i\n", bind);
3415 static ssize_t show_name(struct device *dev, struct device_attribute *attr,
3418 struct con_driver *con = dev_get_drvdata(dev);
3420 return snprintf(buf, PAGE_SIZE, "%s %s\n",
3421 (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)",
3426 static struct device_attribute device_attrs[] = {
3427 __ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind),
3428 __ATTR(name, S_IRUGO, show_name, NULL),
3431 static int vtconsole_init_device(struct con_driver *con)
3436 con->flag |= CON_DRIVER_FLAG_ATTR;
3437 dev_set_drvdata(con->dev, con);
3438 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3439 error = device_create_file(con->dev, &device_attrs[i]);
3446 device_remove_file(con->dev, &device_attrs[i]);
3447 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3453 static void vtconsole_deinit_device(struct con_driver *con)
3457 if (con->flag & CON_DRIVER_FLAG_ATTR) {
3458 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3459 device_remove_file(con->dev, &device_attrs[i]);
3460 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3465 * con_is_bound - checks if driver is bound to the console
3466 * @csw: console driver
3468 * RETURNS: zero if unbound, nonzero if bound
3470 * Drivers can call this and if zero, they should release
3471 * all resources allocated on con_startup()
3473 int con_is_bound(const struct consw *csw)
3477 for (i = 0; i < MAX_NR_CONSOLES; i++) {
3478 if (con_driver_map[i] == csw) {
3486 EXPORT_SYMBOL(con_is_bound);
3489 * con_debug_enter - prepare the console for the kernel debugger
3490 * @sw: console driver
3492 * Called when the console is taken over by the kernel debugger, this
3493 * function needs to save the current console state, then put the console
3494 * into a state suitable for the kernel debugger.
3497 * Zero on success, nonzero if a failure occurred when trying to prepare
3498 * the console for the debugger.
3500 int con_debug_enter(struct vc_data *vc)
3504 saved_fg_console = fg_console;
3505 saved_last_console = last_console;
3506 saved_want_console = want_console;
3507 saved_vc_mode = vc->vc_mode;
3508 saved_console_blanked = console_blanked;
3509 vc->vc_mode = KD_TEXT;
3510 console_blanked = 0;
3511 if (vc->vc_sw->con_debug_enter)
3512 ret = vc->vc_sw->con_debug_enter(vc);
3513 #ifdef CONFIG_KGDB_KDB
3514 /* Set the initial LINES variable if it is not already set */
3515 if (vc->vc_rows < 999) {
3518 const char *setargs[3] = {
3523 if (kdbgetintenv(setargs[0], &linecount)) {
3524 snprintf(lns, 4, "%i", vc->vc_rows);
3525 kdb_set(2, setargs);
3528 if (vc->vc_cols < 999) {
3531 const char *setargs[3] = {
3536 if (kdbgetintenv(setargs[0], &colcount)) {
3537 snprintf(cols, 4, "%i", vc->vc_cols);
3538 kdb_set(2, setargs);
3541 #endif /* CONFIG_KGDB_KDB */
3544 EXPORT_SYMBOL_GPL(con_debug_enter);
3547 * con_debug_leave - restore console state
3548 * @sw: console driver
3550 * Restore the console state to what it was before the kernel debugger
3554 * Zero on success, nonzero if a failure occurred when trying to restore
3557 int con_debug_leave(void)
3562 fg_console = saved_fg_console;
3563 last_console = saved_last_console;
3564 want_console = saved_want_console;
3565 console_blanked = saved_console_blanked;
3566 vc_cons[fg_console].d->vc_mode = saved_vc_mode;
3568 vc = vc_cons[fg_console].d;
3569 if (vc->vc_sw->con_debug_leave)
3570 ret = vc->vc_sw->con_debug_leave(vc);
3573 EXPORT_SYMBOL_GPL(con_debug_leave);
3575 static int do_register_con_driver(const struct consw *csw, int first, int last)
3577 struct module *owner = csw->owner;
3578 struct con_driver *con_driver;
3582 WARN_CONSOLE_UNLOCKED();
3584 if (!try_module_get(owner))
3587 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3588 con_driver = ®istered_con_driver[i];
3590 /* already registered */
3591 if (con_driver->con == csw)
3598 desc = csw->con_startup();
3605 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3606 con_driver = ®istered_con_driver[i];
3608 if (con_driver->con == NULL) {
3609 con_driver->con = csw;
3610 con_driver->desc = desc;
3611 con_driver->node = i;
3612 con_driver->flag = CON_DRIVER_FLAG_MODULE |
3613 CON_DRIVER_FLAG_INIT;
3614 con_driver->first = first;
3615 con_driver->last = last;
3624 con_driver->dev = device_create(vtconsole_class, NULL,
3625 MKDEV(0, con_driver->node),
3629 if (IS_ERR(con_driver->dev)) {
3630 printk(KERN_WARNING "Unable to create device for %s; "
3631 "errno = %ld\n", con_driver->desc,
3632 PTR_ERR(con_driver->dev));
3633 con_driver->dev = NULL;
3635 vtconsole_init_device(con_driver);
3645 * do_unregister_con_driver - unregister console driver from console layer
3646 * @csw: console driver
3648 * DESCRIPTION: All drivers that registers to the console layer must
3649 * call this function upon exit, or if the console driver is in a state
3650 * where it won't be able to handle console services, such as the
3651 * framebuffer console without loaded framebuffer drivers.
3653 * The driver must unbind first prior to unregistration.
3655 int do_unregister_con_driver(const struct consw *csw)
3659 /* cannot unregister a bound driver */
3660 if (con_is_bound(csw))
3663 if (csw == conswitchp)
3666 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3667 struct con_driver *con_driver = ®istered_con_driver[i];
3669 if (con_driver->con == csw) {
3670 vtconsole_deinit_device(con_driver);
3671 device_destroy(vtconsole_class,
3672 MKDEV(0, con_driver->node));
3673 con_driver->con = NULL;
3674 con_driver->desc = NULL;
3675 con_driver->dev = NULL;
3676 con_driver->node = 0;
3677 con_driver->flag = 0;
3678 con_driver->first = 0;
3679 con_driver->last = 0;
3686 EXPORT_SYMBOL_GPL(do_unregister_con_driver);
3689 * If we support more console drivers, this function is used
3690 * when a driver wants to take over some existing consoles
3691 * and become default driver for newly opened ones.
3693 * do_take_over_console is basically a register followed by unbind
3695 int do_take_over_console(const struct consw *csw, int first, int last, int deflt)
3699 err = do_register_con_driver(csw, first, last);
3701 * If we get an busy error we still want to bind the console driver
3702 * and return success, as we may have unbound the console driver
3703 * but not unregistered it.
3708 do_bind_con_driver(csw, first, last, deflt);
3712 EXPORT_SYMBOL_GPL(do_take_over_console);
3716 * give_up_console is a wrapper to unregister_con_driver. It will only
3717 * work if driver is fully unbound.
3719 void give_up_console(const struct consw *csw)
3722 do_unregister_con_driver(csw);
3726 static int __init vtconsole_class_init(void)
3730 vtconsole_class = class_create(THIS_MODULE, "vtconsole");
3731 if (IS_ERR(vtconsole_class)) {
3732 printk(KERN_WARNING "Unable to create vt console class; "
3733 "errno = %ld\n", PTR_ERR(vtconsole_class));
3734 vtconsole_class = NULL;
3737 /* Add system drivers to sysfs */
3738 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3739 struct con_driver *con = ®istered_con_driver[i];
3741 if (con->con && !con->dev) {
3742 con->dev = device_create(vtconsole_class, NULL,
3743 MKDEV(0, con->node),
3747 if (IS_ERR(con->dev)) {
3748 printk(KERN_WARNING "Unable to create "
3749 "device for %s; errno = %ld\n",
3750 con->desc, PTR_ERR(con->dev));
3753 vtconsole_init_device(con);
3760 postcore_initcall(vtconsole_class_init);
3768 static int set_vesa_blanking(char __user *p)
3772 if (get_user(mode, p + 1))
3775 vesa_blank_mode = (mode < 4) ? mode : 0;
3779 void do_blank_screen(int entering_gfx)
3781 struct vc_data *vc = vc_cons[fg_console].d;
3784 WARN_CONSOLE_UNLOCKED();
3786 if (console_blanked) {
3787 if (blank_state == blank_vesa_wait) {
3788 blank_state = blank_off;
3789 vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0);
3794 /* entering graphics mode? */
3798 vc->vc_sw->con_blank(vc, -1, 1);
3799 console_blanked = fg_console + 1;
3800 blank_state = blank_off;
3805 if (blank_state != blank_normal_wait)
3807 blank_state = blank_off;
3809 /* don't blank graphics */
3810 if (vc->vc_mode != KD_TEXT) {
3811 console_blanked = fg_console + 1;
3816 del_timer_sync(&console_timer);
3817 blank_timer_expired = 0;
3820 /* In case we need to reset origin, blanking hook returns 1 */
3821 i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0);
3822 console_blanked = fg_console + 1;
3826 if (console_blank_hook && console_blank_hook(1))
3829 if (vesa_off_interval && vesa_blank_mode) {
3830 blank_state = blank_vesa_wait;
3831 mod_timer(&console_timer, jiffies + vesa_off_interval);
3833 vt_event_post(VT_EVENT_BLANK, vc->vc_num, vc->vc_num);
3835 EXPORT_SYMBOL(do_blank_screen);
3838 * Called by timer as well as from vt_console_driver
3840 void do_unblank_screen(int leaving_gfx)
3844 /* This should now always be called from a "sane" (read: can schedule)
3845 * context for the sake of the low level drivers, except in the special
3846 * case of oops_in_progress
3848 if (!oops_in_progress)
3851 WARN_CONSOLE_UNLOCKED();
3854 if (!console_blanked)
3856 if (!vc_cons_allocated(fg_console)) {
3858 pr_warn("unblank_screen: tty %d not allocated ??\n",
3862 vc = vc_cons[fg_console].d;
3863 /* Try to unblank in oops case too */
3864 if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc))
3865 return; /* but leave console_blanked != 0 */
3867 if (blankinterval) {
3868 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
3869 blank_state = blank_normal_wait;
3872 console_blanked = 0;
3873 if (vc->vc_sw->con_blank(vc, 0, leaving_gfx) || vt_force_oops_output(vc))
3874 /* Low-level driver cannot restore -> do it ourselves */
3876 if (console_blank_hook)
3877 console_blank_hook(0);
3880 vt_event_post(VT_EVENT_UNBLANK, vc->vc_num, vc->vc_num);
3882 EXPORT_SYMBOL(do_unblank_screen);
3885 * This is called by the outside world to cause a forced unblank, mostly for
3886 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
3887 * call it with 1 as an argument and so force a mode restore... that may kill
3888 * X or at least garbage the screen but would also make the Oops visible...
3890 void unblank_screen(void)
3892 do_unblank_screen(0);
3896 * We defer the timer blanking to work queue so it can take the console mutex
3897 * (console operations can still happen at irq time, but only from printk which
3898 * has the console mutex. Not perfect yet, but better than no locking
3900 static void blank_screen_t(unsigned long dummy)
3902 if (unlikely(!keventd_up())) {
3903 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
3906 blank_timer_expired = 1;
3907 schedule_work(&console_work);
3910 void poke_blanked_console(void)
3912 WARN_CONSOLE_UNLOCKED();
3914 /* Add this so we quickly catch whoever might call us in a non
3915 * safe context. Nowadays, unblank_screen() isn't to be called in
3916 * atomic contexts and is allowed to schedule (with the special case
3917 * of oops_in_progress, but that isn't of any concern for this
3922 /* This isn't perfectly race free, but a race here would be mostly harmless,
3923 * at worse, we'll do a spurrious blank and it's unlikely
3925 del_timer(&console_timer);
3926 blank_timer_expired = 0;
3928 if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS)
3930 if (console_blanked)
3932 else if (blankinterval) {
3933 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
3934 blank_state = blank_normal_wait;
3942 static void set_palette(struct vc_data *vc)
3944 WARN_CONSOLE_UNLOCKED();
3946 if (vc->vc_mode != KD_GRAPHICS)
3947 vc->vc_sw->con_set_palette(vc, color_table);
3951 * Load palette into the DAC registers. arg points to a colour
3952 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
3955 int con_set_cmap(unsigned char __user *arg)
3958 unsigned char colormap[3*16];
3960 if (copy_from_user(colormap, arg, sizeof(colormap)))
3964 for (i = k = 0; i < 16; i++) {
3965 default_red[i] = colormap[k++];
3966 default_grn[i] = colormap[k++];
3967 default_blu[i] = colormap[k++];
3969 for (i = 0; i < MAX_NR_CONSOLES; i++) {
3970 if (!vc_cons_allocated(i))
3972 for (j = k = 0; j < 16; j++) {
3973 vc_cons[i].d->vc_palette[k++] = default_red[j];
3974 vc_cons[i].d->vc_palette[k++] = default_grn[j];
3975 vc_cons[i].d->vc_palette[k++] = default_blu[j];
3977 set_palette(vc_cons[i].d);
3984 int con_get_cmap(unsigned char __user *arg)
3987 unsigned char colormap[3*16];
3990 for (i = k = 0; i < 16; i++) {
3991 colormap[k++] = default_red[i];
3992 colormap[k++] = default_grn[i];
3993 colormap[k++] = default_blu[i];
3997 if (copy_to_user(arg, colormap, sizeof(colormap)))
4003 void reset_palette(struct vc_data *vc)
4006 for (j=k=0; j<16; j++) {
4007 vc->vc_palette[k++] = default_red[j];
4008 vc->vc_palette[k++] = default_grn[j];
4009 vc->vc_palette[k++] = default_blu[j];
4017 * Currently we only support fonts up to 32 pixels wide, at a maximum height
4018 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
4019 * depending on width) reserved for each character which is kinda wasty, but
4020 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
4021 * is up to the actual low-level console-driver convert data into its favorite
4022 * format (maybe we should add a `fontoffset' field to the `display'
4023 * structure so we won't have to convert the fontdata all the time.
4027 #define max_font_size 65536
4029 static int con_font_get(struct vc_data *vc, struct console_font_op *op)
4031 struct console_font font;
4036 font.data = kmalloc(max_font_size, GFP_KERNEL);
4043 if (vc->vc_mode != KD_TEXT)
4045 else if (vc->vc_sw->con_font_get)
4046 rc = vc->vc_sw->con_font_get(vc, &font);
4054 c = (font.width+7)/8 * 32 * font.charcount;
4056 if (op->data && font.charcount > op->charcount)
4058 if (!(op->flags & KD_FONT_FLAG_OLD)) {
4059 if (font.width > op->width || font.height > op->height)
4062 if (font.width != 8)
4064 else if ((op->height && font.height > op->height) ||
4071 op->height = font.height;
4072 op->width = font.width;
4073 op->charcount = font.charcount;
4075 if (op->data && copy_to_user(op->data, font.data, c))
4083 static int con_font_set(struct vc_data *vc, struct console_font_op *op)
4085 struct console_font font;
4089 if (vc->vc_mode != KD_TEXT)
4093 if (op->charcount > 512)
4095 if (!op->height) { /* Need to guess font height [compat] */
4097 u8 __user *charmap = op->data;
4100 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
4101 so that we can get rid of this soon */
4102 if (!(op->flags & KD_FONT_FLAG_OLD))
4104 for (h = 32; h > 0; h--)
4105 for (i = 0; i < op->charcount; i++) {
4106 if (get_user(tmp, &charmap[32*i+h-1]))
4115 if (op->width <= 0 || op->width > 32 || op->height > 32)
4117 size = (op->width+7)/8 * 32 * op->charcount;
4118 if (size > max_font_size)
4120 font.charcount = op->charcount;
4121 font.height = op->height;
4122 font.width = op->width;
4123 font.data = memdup_user(op->data, size);
4124 if (IS_ERR(font.data))
4125 return PTR_ERR(font.data);
4127 if (vc->vc_mode != KD_TEXT)
4129 else if (vc->vc_sw->con_font_set)
4130 rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
4138 static int con_font_default(struct vc_data *vc, struct console_font_op *op)
4140 struct console_font font = {.width = op->width, .height = op->height};
4141 char name[MAX_FONT_NAME];
4148 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0)
4151 name[MAX_FONT_NAME - 1] = 0;
4154 if (vc->vc_mode != KD_TEXT) {
4158 if (vc->vc_sw->con_font_default)
4159 rc = vc->vc_sw->con_font_default(vc, &font, s);
4164 op->width = font.width;
4165 op->height = font.height;
4170 static int con_font_copy(struct vc_data *vc, struct console_font_op *op)
4172 int con = op->height;
4177 if (vc->vc_mode != KD_TEXT)
4179 else if (!vc->vc_sw->con_font_copy)
4181 else if (con < 0 || !vc_cons_allocated(con))
4183 else if (con == vc->vc_num) /* nothing to do */
4186 rc = vc->vc_sw->con_font_copy(vc, con);
4191 int con_font_op(struct vc_data *vc, struct console_font_op *op)
4194 case KD_FONT_OP_SET:
4195 return con_font_set(vc, op);
4196 case KD_FONT_OP_GET:
4197 return con_font_get(vc, op);
4198 case KD_FONT_OP_SET_DEFAULT:
4199 return con_font_default(vc, op);
4200 case KD_FONT_OP_COPY:
4201 return con_font_copy(vc, op);
4207 * Interface exported to selection and vcs.
4210 /* used by selection */
4211 u16 screen_glyph(struct vc_data *vc, int offset)
4213 u16 w = scr_readw(screenpos(vc, offset, 1));
4216 if (w & vc->vc_hi_font_mask)
4220 EXPORT_SYMBOL_GPL(screen_glyph);
4222 /* used by vcs - note the word offset */
4223 unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed)
4225 return screenpos(vc, 2 * w_offset, viewed);
4228 void getconsxy(struct vc_data *vc, unsigned char *p)
4234 void putconsxy(struct vc_data *vc, unsigned char *p)
4237 gotoxy(vc, p[0], p[1]);
4241 u16 vcs_scr_readw(struct vc_data *vc, const u16 *org)
4243 if ((unsigned long)org == vc->vc_pos && softcursor_original != -1)
4244 return softcursor_original;
4245 return scr_readw(org);
4248 void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org)
4250 scr_writew(val, org);
4251 if ((unsigned long)org == vc->vc_pos) {
4252 softcursor_original = -1;
4257 void vcs_scr_updated(struct vc_data *vc)
4263 * Visible symbols for modules
4266 EXPORT_SYMBOL(color_table);
4267 EXPORT_SYMBOL(default_red);
4268 EXPORT_SYMBOL(default_grn);
4269 EXPORT_SYMBOL(default_blu);
4270 EXPORT_SYMBOL(update_region);
4271 EXPORT_SYMBOL(redraw_screen);
4272 EXPORT_SYMBOL(vc_resize);
4273 EXPORT_SYMBOL(fg_console);
4274 EXPORT_SYMBOL(console_blank_hook);
4275 EXPORT_SYMBOL(console_blanked);
4276 EXPORT_SYMBOL(vc_cons);
4277 EXPORT_SYMBOL(global_cursor_default);
4278 #ifndef VT_SINGLE_DRIVER
4279 EXPORT_SYMBOL(give_up_console);