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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>
81#include <linux/kd.h>
82#include <linux/slab.h>
83#include <linux/major.h>
84#include <linux/mm.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>
96#include <linux/pm.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>
105
106#define MAX_NR_CON_DRIVER 16
107
108#define CON_DRIVER_FLAG_MODULE 1
109#define CON_DRIVER_FLAG_INIT 2
110#define CON_DRIVER_FLAG_ATTR 4
111#define CON_DRIVER_FLAG_ZOMBIE 8
112
113struct con_driver {
114 const struct consw *con;
115 const char *desc;
116 struct device *dev;
117 int node;
118 int first;
119 int last;
120 int flag;
121};
122
123static struct con_driver registered_con_driver[MAX_NR_CON_DRIVER];
124const struct consw *conswitchp;
125
126
127
128
129
130
131#define CTRL_ACTION 0x0d00ff81
132#define CTRL_ALWAYS 0x0800f501
133
134
135
136
137#define DEFAULT_BELL_PITCH 750
138#define DEFAULT_BELL_DURATION (HZ/8)
139#define DEFAULT_CURSOR_BLINK_MS 200
140
141struct vc vc_cons [MAX_NR_CONSOLES];
142
143#ifndef VT_SINGLE_DRIVER
144static const struct consw *con_driver_map[MAX_NR_CONSOLES];
145#endif
146
147static int con_open(struct tty_struct *, struct file *);
148static void vc_init(struct vc_data *vc, unsigned int rows,
149 unsigned int cols, int do_clear);
150static void gotoxy(struct vc_data *vc, int new_x, int new_y);
151static void save_cur(struct vc_data *vc);
152static void reset_terminal(struct vc_data *vc, int do_clear);
153static void con_flush_chars(struct tty_struct *tty);
154static int set_vesa_blanking(char __user *p);
155static void set_cursor(struct vc_data *vc);
156static void hide_cursor(struct vc_data *vc);
157static void console_callback(struct work_struct *ignored);
158static void con_driver_unregister_callback(struct work_struct *ignored);
159static void blank_screen_t(unsigned long dummy);
160static void set_palette(struct vc_data *vc);
161
162#define vt_get_kmsg_redirect() vt_kmsg_redirect(-1)
163
164static int printable;
165int default_utf8 = true;
166module_param(default_utf8, int, S_IRUGO | S_IWUSR);
167int global_cursor_default = -1;
168module_param(global_cursor_default, int, S_IRUGO | S_IWUSR);
169
170static int cur_default = CUR_DEFAULT;
171module_param(cur_default, int, S_IRUGO | S_IWUSR);
172
173
174
175
176
177static int ignore_poke;
178
179int do_poke_blanked_console;
180int console_blanked;
181
182static int vesa_blank_mode;
183static int vesa_off_interval;
184static int blankinterval = 10*60;
185core_param(consoleblank, blankinterval, int, 0444);
186
187static DECLARE_WORK(console_work, console_callback);
188static DECLARE_WORK(con_driver_unregister_work, con_driver_unregister_callback);
189
190
191
192
193
194
195
196int fg_console;
197int last_console;
198int want_console = -1;
199static int saved_fg_console;
200static int saved_last_console;
201static int saved_want_console;
202static int saved_vc_mode;
203static int saved_console_blanked;
204
205
206
207
208
209
210
211static struct vc_data *master_display_fg;
212
213
214
215
216
217
218
219
220
221
222
223static int scrollback_delta;
224
225
226
227
228
229int (*console_blank_hook)(int);
230
231static DEFINE_TIMER(console_timer, blank_screen_t, 0, 0);
232static int blank_state;
233static int blank_timer_expired;
234enum {
235 blank_off = 0,
236 blank_normal_wait,
237 blank_vesa_wait,
238};
239
240
241
242
243
244
245
246static struct device *tty0dev;
247
248
249
250
251static ATOMIC_NOTIFIER_HEAD(vt_notifier_list);
252
253int register_vt_notifier(struct notifier_block *nb)
254{
255 return atomic_notifier_chain_register(&vt_notifier_list, nb);
256}
257EXPORT_SYMBOL_GPL(register_vt_notifier);
258
259int unregister_vt_notifier(struct notifier_block *nb)
260{
261 return atomic_notifier_chain_unregister(&vt_notifier_list, nb);
262}
263EXPORT_SYMBOL_GPL(unregister_vt_notifier);
264
265static void notify_write(struct vc_data *vc, unsigned int unicode)
266{
267 struct vt_notifier_param param = { .vc = vc, .c = unicode };
268 atomic_notifier_call_chain(&vt_notifier_list, VT_WRITE, ¶m);
269}
270
271static void notify_update(struct vc_data *vc)
272{
273 struct vt_notifier_param param = { .vc = vc };
274 atomic_notifier_call_chain(&vt_notifier_list, VT_UPDATE, ¶m);
275}
276
277
278
279
280static inline bool con_is_fg(const struct vc_data *vc)
281{
282 return vc->vc_num == fg_console;
283}
284
285static inline bool con_should_update(const struct vc_data *vc)
286{
287 return con_is_visible(vc) && !console_blanked;
288}
289
290static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed)
291{
292 unsigned short *p;
293
294 if (!viewed)
295 p = (unsigned short *)(vc->vc_origin + offset);
296 else if (!vc->vc_sw->con_screen_pos)
297 p = (unsigned short *)(vc->vc_visible_origin + offset);
298 else
299 p = vc->vc_sw->con_screen_pos(vc, offset);
300 return p;
301}
302
303
304static inline void scrolldelta(int lines)
305{
306
307
308
309 scrollback_delta += lines;
310 schedule_console_callback();
311}
312
313void schedule_console_callback(void)
314{
315 schedule_work(&console_work);
316}
317
318static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
319{
320 unsigned short *d, *s;
321
322 if (t+nr >= b)
323 nr = b - t - 1;
324 if (b > vc->vc_rows || t >= b || nr < 1)
325 return;
326 if (con_is_visible(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr))
327 return;
328 d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
329 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr));
330 scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row);
331 scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_video_erase_char,
332 vc->vc_size_row * nr);
333}
334
335static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
336{
337 unsigned short *s;
338 unsigned int step;
339
340 if (t+nr >= b)
341 nr = b - t - 1;
342 if (b > vc->vc_rows || t >= b || nr < 1)
343 return;
344 if (con_is_visible(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr))
345 return;
346 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
347 step = vc->vc_cols * nr;
348 scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row);
349 scr_memsetw(s, vc->vc_video_erase_char, 2 * step);
350}
351
352static void do_update_region(struct vc_data *vc, unsigned long start, int count)
353{
354 unsigned int xx, yy, offset;
355 u16 *p;
356
357 p = (u16 *) start;
358 if (!vc->vc_sw->con_getxy) {
359 offset = (start - vc->vc_origin) / 2;
360 xx = offset % vc->vc_cols;
361 yy = offset / vc->vc_cols;
362 } else {
363 int nxx, nyy;
364 start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy);
365 xx = nxx; yy = nyy;
366 }
367 for(;;) {
368 u16 attrib = scr_readw(p) & 0xff00;
369 int startx = xx;
370 u16 *q = p;
371 while (xx < vc->vc_cols && count) {
372 if (attrib != (scr_readw(p) & 0xff00)) {
373 if (p > q)
374 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
375 startx = xx;
376 q = p;
377 attrib = scr_readw(p) & 0xff00;
378 }
379 p++;
380 xx++;
381 count--;
382 }
383 if (p > q)
384 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
385 if (!count)
386 break;
387 xx = 0;
388 yy++;
389 if (vc->vc_sw->con_getxy) {
390 p = (u16 *)start;
391 start = vc->vc_sw->con_getxy(vc, start, NULL, NULL);
392 }
393 }
394}
395
396void update_region(struct vc_data *vc, unsigned long start, int count)
397{
398 WARN_CONSOLE_UNLOCKED();
399
400 if (con_should_update(vc)) {
401 hide_cursor(vc);
402 do_update_region(vc, start, count);
403 set_cursor(vc);
404 }
405}
406
407
408
409static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink,
410 u8 _underline, u8 _reverse, u8 _italic)
411{
412 if (vc->vc_sw->con_build_attr)
413 return vc->vc_sw->con_build_attr(vc, _color, _intensity,
414 _blink, _underline, _reverse, _italic);
415
416
417
418
419
420
421
422
423
424
425
426 {
427 u8 a = _color;
428 if (!vc->vc_can_do_color)
429 return _intensity |
430 (_italic ? 2 : 0) |
431 (_underline ? 4 : 0) |
432 (_reverse ? 8 : 0) |
433 (_blink ? 0x80 : 0);
434 if (_italic)
435 a = (a & 0xF0) | vc->vc_itcolor;
436 else if (_underline)
437 a = (a & 0xf0) | vc->vc_ulcolor;
438 else if (_intensity == 0)
439 a = (a & 0xf0) | vc->vc_ulcolor;
440 if (_reverse)
441 a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77);
442 if (_blink)
443 a ^= 0x80;
444 if (_intensity == 2)
445 a ^= 0x08;
446 if (vc->vc_hi_font_mask == 0x100)
447 a <<= 1;
448 return a;
449 }
450}
451
452static void update_attr(struct vc_data *vc)
453{
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) | ' ';
458}
459
460
461void invert_screen(struct vc_data *vc, int offset, int count, int viewed)
462{
463 unsigned short *p;
464
465 WARN_CONSOLE_UNLOCKED();
466
467 count /= 2;
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 } else {
472 u16 *q = p;
473 int cnt = count;
474 u16 a;
475
476 if (!vc->vc_can_do_color) {
477 while (cnt--) {
478 a = scr_readw(q);
479 a ^= 0x0800;
480 scr_writew(a, q);
481 q++;
482 }
483 } else if (vc->vc_hi_font_mask == 0x100) {
484 while (cnt--) {
485 a = scr_readw(q);
486 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4);
487 scr_writew(a, q);
488 q++;
489 }
490 } else {
491 while (cnt--) {
492 a = scr_readw(q);
493 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4);
494 scr_writew(a, q);
495 q++;
496 }
497 }
498 }
499
500 if (con_should_update(vc))
501 do_update_region(vc, (unsigned long) p, count);
502 notify_update(vc);
503}
504
505
506void complement_pos(struct vc_data *vc, int offset)
507{
508 static int old_offset = -1;
509 static unsigned short old;
510 static unsigned short oldx, oldy;
511
512 WARN_CONSOLE_UNLOCKED();
513
514 if (old_offset != -1 && old_offset >= 0 &&
515 old_offset < vc->vc_screenbuf_size) {
516 scr_writew(old, screenpos(vc, old_offset, 1));
517 if (con_should_update(vc))
518 vc->vc_sw->con_putc(vc, old, oldy, oldx);
519 notify_update(vc);
520 }
521
522 old_offset = offset;
523
524 if (offset != -1 && offset >= 0 &&
525 offset < vc->vc_screenbuf_size) {
526 unsigned short new;
527 unsigned short *p;
528 p = screenpos(vc, offset, 1);
529 old = scr_readw(p);
530 new = old ^ vc->vc_complement_mask;
531 scr_writew(new, p);
532 if (con_should_update(vc)) {
533 oldx = (offset >> 1) % vc->vc_cols;
534 oldy = (offset >> 1) / vc->vc_cols;
535 vc->vc_sw->con_putc(vc, new, oldy, oldx);
536 }
537 notify_update(vc);
538 }
539}
540
541static void insert_char(struct vc_data *vc, unsigned int nr)
542{
543 unsigned short *p = (unsigned short *) vc->vc_pos;
544
545 scr_memmovew(p + nr, p, (vc->vc_cols - vc->vc_x - nr) * 2);
546 scr_memsetw(p, vc->vc_video_erase_char, nr * 2);
547 vc->vc_need_wrap = 0;
548 if (con_should_update(vc))
549 do_update_region(vc, (unsigned long) p,
550 vc->vc_cols - vc->vc_x);
551}
552
553static void delete_char(struct vc_data *vc, unsigned int nr)
554{
555 unsigned short *p = (unsigned short *) vc->vc_pos;
556
557 scr_memcpyw(p, p + nr, (vc->vc_cols - vc->vc_x - nr) * 2);
558 scr_memsetw(p + vc->vc_cols - vc->vc_x - nr, vc->vc_video_erase_char,
559 nr * 2);
560 vc->vc_need_wrap = 0;
561 if (con_should_update(vc))
562 do_update_region(vc, (unsigned long) p,
563 vc->vc_cols - vc->vc_x);
564}
565
566static int softcursor_original = -1;
567
568static void add_softcursor(struct vc_data *vc)
569{
570 int i = scr_readw((u16 *) vc->vc_pos);
571 u32 type = vc->vc_cursor_type;
572
573 if (! (type & 0x10)) return;
574 if (softcursor_original != -1) return;
575 softcursor_original = i;
576 i |= ((type >> 8) & 0xff00 );
577 i ^= ((type) & 0xff00 );
578 if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000;
579 if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700;
580 scr_writew(i, (u16 *) vc->vc_pos);
581 if (con_should_update(vc))
582 vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x);
583}
584
585static void hide_softcursor(struct vc_data *vc)
586{
587 if (softcursor_original != -1) {
588 scr_writew(softcursor_original, (u16 *)vc->vc_pos);
589 if (con_should_update(vc))
590 vc->vc_sw->con_putc(vc, softcursor_original,
591 vc->vc_y, vc->vc_x);
592 softcursor_original = -1;
593 }
594}
595
596static void hide_cursor(struct vc_data *vc)
597{
598 if (vc == sel_cons)
599 clear_selection();
600 vc->vc_sw->con_cursor(vc, CM_ERASE);
601 hide_softcursor(vc);
602}
603
604static void set_cursor(struct vc_data *vc)
605{
606 if (!con_is_fg(vc) || console_blanked || vc->vc_mode == KD_GRAPHICS)
607 return;
608 if (vc->vc_deccm) {
609 if (vc == sel_cons)
610 clear_selection();
611 add_softcursor(vc);
612 if ((vc->vc_cursor_type & 0x0f) != 1)
613 vc->vc_sw->con_cursor(vc, CM_DRAW);
614 } else
615 hide_cursor(vc);
616}
617
618static void set_origin(struct vc_data *vc)
619{
620 WARN_CONSOLE_UNLOCKED();
621
622 if (!con_is_visible(vc) ||
623 !vc->vc_sw->con_set_origin ||
624 !vc->vc_sw->con_set_origin(vc))
625 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
626 vc->vc_visible_origin = vc->vc_origin;
627 vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size;
628 vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x;
629}
630
631static void save_screen(struct vc_data *vc)
632{
633 WARN_CONSOLE_UNLOCKED();
634
635 if (vc->vc_sw->con_save_screen)
636 vc->vc_sw->con_save_screen(vc);
637}
638
639
640
641
642
643void clear_buffer_attributes(struct vc_data *vc)
644{
645 unsigned short *p = (unsigned short *)vc->vc_origin;
646 int count = vc->vc_screenbuf_size / 2;
647 int mask = vc->vc_hi_font_mask | 0xff;
648
649 for (; count > 0; count--, p++) {
650 scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p);
651 }
652}
653
654void redraw_screen(struct vc_data *vc, int is_switch)
655{
656 int redraw = 0;
657
658 WARN_CONSOLE_UNLOCKED();
659
660 if (!vc) {
661
662
663 return;
664 }
665
666 if (is_switch) {
667 struct vc_data *old_vc = vc_cons[fg_console].d;
668 if (old_vc == vc)
669 return;
670 if (!con_is_visible(vc))
671 redraw = 1;
672 *vc->vc_display_fg = vc;
673 fg_console = vc->vc_num;
674 hide_cursor(old_vc);
675 if (!con_is_visible(old_vc)) {
676 save_screen(old_vc);
677 set_origin(old_vc);
678 }
679 if (tty0dev)
680 sysfs_notify(&tty0dev->kobj, NULL, "active");
681 } else {
682 hide_cursor(vc);
683 redraw = 1;
684 }
685
686 if (redraw) {
687 int update;
688 int old_was_color = vc->vc_can_do_color;
689
690 set_origin(vc);
691 update = vc->vc_sw->con_switch(vc);
692 set_palette(vc);
693
694
695
696
697
698
699 if (old_was_color != vc->vc_can_do_color) {
700 update_attr(vc);
701 clear_buffer_attributes(vc);
702 }
703
704
705 if ((update && vc->vc_mode != KD_GRAPHICS) ||
706 vt_force_oops_output(vc))
707 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
708 }
709 set_cursor(vc);
710 if (is_switch) {
711 set_leds();
712 compute_shiftstate();
713 notify_update(vc);
714 }
715}
716
717
718
719
720
721int vc_cons_allocated(unsigned int i)
722{
723 return (i < MAX_NR_CONSOLES && vc_cons[i].d);
724}
725
726static void visual_init(struct vc_data *vc, int num, int init)
727{
728
729 if (vc->vc_sw)
730 module_put(vc->vc_sw->owner);
731 vc->vc_sw = conswitchp;
732#ifndef VT_SINGLE_DRIVER
733 if (con_driver_map[num])
734 vc->vc_sw = con_driver_map[num];
735#endif
736 __module_get(vc->vc_sw->owner);
737 vc->vc_num = num;
738 vc->vc_display_fg = &master_display_fg;
739 if (vc->vc_uni_pagedir_loc)
740 con_free_unimap(vc);
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_cur_blink_ms = DEFAULT_CURSOR_BLINK_MS;
748 vc->vc_sw->con_init(vc, init);
749 if (!vc->vc_complement_mask)
750 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
751 vc->vc_s_complement_mask = vc->vc_complement_mask;
752 vc->vc_size_row = vc->vc_cols << 1;
753 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
754}
755
756int vc_allocate(unsigned int currcons)
757{
758 struct vt_notifier_param param;
759 struct vc_data *vc;
760
761 WARN_CONSOLE_UNLOCKED();
762
763 if (currcons >= MAX_NR_CONSOLES)
764 return -ENXIO;
765
766 if (vc_cons[currcons].d)
767 return 0;
768
769
770
771
772
773
774
775 param.vc = vc = kzalloc(sizeof(struct vc_data), GFP_KERNEL);
776 if (!vc)
777 return -ENOMEM;
778
779 vc_cons[currcons].d = vc;
780 tty_port_init(&vc->port);
781 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
782
783 visual_init(vc, currcons, 1);
784
785 if (!*vc->vc_uni_pagedir_loc)
786 con_set_default_unimap(vc);
787
788 vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL);
789 if (!vc->vc_screenbuf)
790 goto err_free;
791
792
793
794 if (global_cursor_default == -1)
795 global_cursor_default = 1;
796
797 vc_init(vc, vc->vc_rows, vc->vc_cols, 1);
798 vcs_make_sysfs(currcons);
799 atomic_notifier_call_chain(&vt_notifier_list, VT_ALLOCATE, ¶m);
800
801 return 0;
802err_free:
803 kfree(vc);
804 vc_cons[currcons].d = NULL;
805 return -ENOMEM;
806}
807
808static inline int resize_screen(struct vc_data *vc, int width, int height,
809 int user)
810{
811
812 int err = 0;
813
814 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize)
815 err = vc->vc_sw->con_resize(vc, width, height, user);
816
817 return err;
818}
819
820
821
822
823
824
825#define VC_RESIZE_MAXCOL (32767)
826#define VC_RESIZE_MAXROW (32767)
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc,
845 unsigned int cols, unsigned int lines)
846{
847 unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0;
848 unsigned long end;
849 unsigned int old_rows, old_row_size;
850 unsigned int new_cols, new_rows, new_row_size, new_screen_size;
851 unsigned int user;
852 unsigned short *newscreen;
853
854 WARN_CONSOLE_UNLOCKED();
855
856 if (!vc)
857 return -ENXIO;
858
859 user = vc->vc_resize_user;
860 vc->vc_resize_user = 0;
861
862 if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW)
863 return -EINVAL;
864
865 new_cols = (cols ? cols : vc->vc_cols);
866 new_rows = (lines ? lines : vc->vc_rows);
867 new_row_size = new_cols << 1;
868 new_screen_size = new_row_size * new_rows;
869
870 if (new_cols == vc->vc_cols && new_rows == vc->vc_rows)
871 return 0;
872
873 if (new_screen_size > (4 << 20))
874 return -EINVAL;
875 newscreen = kmalloc(new_screen_size, GFP_USER);
876 if (!newscreen)
877 return -ENOMEM;
878
879 if (vc == sel_cons)
880 clear_selection();
881
882 old_rows = vc->vc_rows;
883 old_row_size = vc->vc_size_row;
884
885 err = resize_screen(vc, new_cols, new_rows, user);
886 if (err) {
887 kfree(newscreen);
888 return err;
889 }
890
891 vc->vc_rows = new_rows;
892 vc->vc_cols = new_cols;
893 vc->vc_size_row = new_row_size;
894 vc->vc_screenbuf_size = new_screen_size;
895
896 rlth = min(old_row_size, new_row_size);
897 rrem = new_row_size - rlth;
898 old_origin = vc->vc_origin;
899 new_origin = (long) newscreen;
900 new_scr_end = new_origin + new_screen_size;
901
902 if (vc->vc_y > new_rows) {
903 if (old_rows - vc->vc_y < new_rows) {
904
905
906
907
908 old_origin += (old_rows - new_rows) * old_row_size;
909 } else {
910
911
912
913
914 old_origin += (vc->vc_y - new_rows/2) * old_row_size;
915 }
916 }
917
918 end = old_origin + old_row_size * min(old_rows, new_rows);
919
920 update_attr(vc);
921
922 while (old_origin < end) {
923 scr_memcpyw((unsigned short *) new_origin,
924 (unsigned short *) old_origin, rlth);
925 if (rrem)
926 scr_memsetw((void *)(new_origin + rlth),
927 vc->vc_video_erase_char, rrem);
928 old_origin += old_row_size;
929 new_origin += new_row_size;
930 }
931 if (new_scr_end > new_origin)
932 scr_memsetw((void *)new_origin, vc->vc_video_erase_char,
933 new_scr_end - new_origin);
934 kfree(vc->vc_screenbuf);
935 vc->vc_screenbuf = newscreen;
936 vc->vc_screenbuf_size = new_screen_size;
937 set_origin(vc);
938
939
940 vc->vc_top = 0;
941 vc->vc_bottom = vc->vc_rows;
942 gotoxy(vc, vc->vc_x, vc->vc_y);
943 save_cur(vc);
944
945 if (tty) {
946
947
948 struct winsize ws;
949 memset(&ws, 0, sizeof(ws));
950 ws.ws_row = vc->vc_rows;
951 ws.ws_col = vc->vc_cols;
952 ws.ws_ypixel = vc->vc_scan_lines;
953 tty_do_resize(tty, &ws);
954 }
955
956 if (con_is_visible(vc))
957 update_screen(vc);
958 vt_event_post(VT_EVENT_RESIZE, vc->vc_num, vc->vc_num);
959 return err;
960}
961
962
963
964
965
966
967
968
969
970
971
972
973
974int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int rows)
975{
976 return vc_do_resize(vc->port.tty, vc, cols, rows);
977}
978
979
980
981
982
983
984
985
986
987
988
989
990
991static int vt_resize(struct tty_struct *tty, struct winsize *ws)
992{
993 struct vc_data *vc = tty->driver_data;
994 int ret;
995
996 console_lock();
997 ret = vc_do_resize(tty, vc, ws->ws_col, ws->ws_row);
998 console_unlock();
999 return ret;
1000}
1001
1002struct vc_data *vc_deallocate(unsigned int currcons)
1003{
1004 struct vc_data *vc = NULL;
1005
1006 WARN_CONSOLE_UNLOCKED();
1007
1008 if (vc_cons_allocated(currcons)) {
1009 struct vt_notifier_param param;
1010
1011 param.vc = vc = vc_cons[currcons].d;
1012 atomic_notifier_call_chain(&vt_notifier_list, VT_DEALLOCATE, ¶m);
1013 vcs_remove_sysfs(currcons);
1014 vc->vc_sw->con_deinit(vc);
1015 put_pid(vc->vt_pid);
1016 module_put(vc->vc_sw->owner);
1017 kfree(vc->vc_screenbuf);
1018 vc_cons[currcons].d = NULL;
1019 }
1020 return vc;
1021}
1022
1023
1024
1025
1026
1027#define set_kbd(vc, x) vt_set_kbd_mode_bit((vc)->vc_num, (x))
1028#define clr_kbd(vc, x) vt_clr_kbd_mode_bit((vc)->vc_num, (x))
1029#define is_kbd(vc, x) vt_get_kbd_mode_bit((vc)->vc_num, (x))
1030
1031#define decarm VC_REPEAT
1032#define decckm VC_CKMODE
1033#define kbdapplic VC_APPLIC
1034#define lnm VC_CRLF
1035
1036
1037
1038
1039#define VT100ID "\033[?1;2c"
1040#define VT102ID "\033[?6c"
1041
1042const unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7,
1043 8,12,10,14, 9,13,11,15 };
1044
1045
1046unsigned char default_red[] = {
1047 0x00, 0xaa, 0x00, 0xaa, 0x00, 0xaa, 0x00, 0xaa,
1048 0x55, 0xff, 0x55, 0xff, 0x55, 0xff, 0x55, 0xff
1049};
1050module_param_array(default_red, byte, NULL, S_IRUGO | S_IWUSR);
1051
1052unsigned char default_grn[] = {
1053 0x00, 0x00, 0xaa, 0x55, 0x00, 0x00, 0xaa, 0xaa,
1054 0x55, 0x55, 0xff, 0xff, 0x55, 0x55, 0xff, 0xff
1055};
1056module_param_array(default_grn, byte, NULL, S_IRUGO | S_IWUSR);
1057
1058unsigned char default_blu[] = {
1059 0x00, 0x00, 0x00, 0x00, 0xaa, 0xaa, 0xaa, 0xaa,
1060 0x55, 0x55, 0x55, 0x55, 0xff, 0xff, 0xff, 0xff
1061};
1062module_param_array(default_blu, byte, NULL, S_IRUGO | S_IWUSR);
1063
1064
1065
1066
1067
1068
1069static void gotoxy(struct vc_data *vc, int new_x, int new_y)
1070{
1071 int min_y, max_y;
1072
1073 if (new_x < 0)
1074 vc->vc_x = 0;
1075 else {
1076 if (new_x >= vc->vc_cols)
1077 vc->vc_x = vc->vc_cols - 1;
1078 else
1079 vc->vc_x = new_x;
1080 }
1081
1082 if (vc->vc_decom) {
1083 min_y = vc->vc_top;
1084 max_y = vc->vc_bottom;
1085 } else {
1086 min_y = 0;
1087 max_y = vc->vc_rows;
1088 }
1089 if (new_y < min_y)
1090 vc->vc_y = min_y;
1091 else if (new_y >= max_y)
1092 vc->vc_y = max_y - 1;
1093 else
1094 vc->vc_y = new_y;
1095 vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1);
1096 vc->vc_need_wrap = 0;
1097}
1098
1099
1100static void gotoxay(struct vc_data *vc, int new_x, int new_y)
1101{
1102 gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y);
1103}
1104
1105void scrollback(struct vc_data *vc)
1106{
1107 scrolldelta(-(vc->vc_rows / 2));
1108}
1109
1110void scrollfront(struct vc_data *vc, int lines)
1111{
1112 if (!lines)
1113 lines = vc->vc_rows / 2;
1114 scrolldelta(lines);
1115}
1116
1117static void lf(struct vc_data *vc)
1118{
1119
1120
1121
1122 if (vc->vc_y + 1 == vc->vc_bottom)
1123 scrup(vc, vc->vc_top, vc->vc_bottom, 1);
1124 else if (vc->vc_y < vc->vc_rows - 1) {
1125 vc->vc_y++;
1126 vc->vc_pos += vc->vc_size_row;
1127 }
1128 vc->vc_need_wrap = 0;
1129 notify_write(vc, '\n');
1130}
1131
1132static void ri(struct vc_data *vc)
1133{
1134
1135
1136
1137 if (vc->vc_y == vc->vc_top)
1138 scrdown(vc, vc->vc_top, vc->vc_bottom, 1);
1139 else if (vc->vc_y > 0) {
1140 vc->vc_y--;
1141 vc->vc_pos -= vc->vc_size_row;
1142 }
1143 vc->vc_need_wrap = 0;
1144}
1145
1146static inline void cr(struct vc_data *vc)
1147{
1148 vc->vc_pos -= vc->vc_x << 1;
1149 vc->vc_need_wrap = vc->vc_x = 0;
1150 notify_write(vc, '\r');
1151}
1152
1153static inline void bs(struct vc_data *vc)
1154{
1155 if (vc->vc_x) {
1156 vc->vc_pos -= 2;
1157 vc->vc_x--;
1158 vc->vc_need_wrap = 0;
1159 notify_write(vc, '\b');
1160 }
1161}
1162
1163static inline void del(struct vc_data *vc)
1164{
1165
1166}
1167
1168static void csi_J(struct vc_data *vc, int vpar)
1169{
1170 unsigned int count;
1171 unsigned short * start;
1172
1173 switch (vpar) {
1174 case 0:
1175 count = (vc->vc_scr_end - vc->vc_pos) >> 1;
1176 start = (unsigned short *)vc->vc_pos;
1177 break;
1178 case 1:
1179 count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1;
1180 start = (unsigned short *)vc->vc_origin;
1181 break;
1182 case 3:
1183 scr_memsetw(vc->vc_screenbuf, vc->vc_video_erase_char,
1184 vc->vc_screenbuf_size);
1185 set_origin(vc);
1186 if (con_is_visible(vc))
1187 update_screen(vc);
1188
1189 case 2:
1190 count = vc->vc_cols * vc->vc_rows;
1191 start = (unsigned short *)vc->vc_origin;
1192 break;
1193 default:
1194 return;
1195 }
1196 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1197 if (con_should_update(vc))
1198 do_update_region(vc, (unsigned long) start, count);
1199 vc->vc_need_wrap = 0;
1200}
1201
1202static void csi_K(struct vc_data *vc, int vpar)
1203{
1204 unsigned int count;
1205 unsigned short * start;
1206
1207 switch (vpar) {
1208 case 0:
1209 count = vc->vc_cols - vc->vc_x;
1210 start = (unsigned short *)vc->vc_pos;
1211 break;
1212 case 1:
1213 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1214 count = vc->vc_x + 1;
1215 break;
1216 case 2:
1217 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1218 count = vc->vc_cols;
1219 break;
1220 default:
1221 return;
1222 }
1223 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1224 vc->vc_need_wrap = 0;
1225 if (con_should_update(vc))
1226 do_update_region(vc, (unsigned long) start, count);
1227}
1228
1229static void csi_X(struct vc_data *vc, int vpar)
1230{
1231 int count;
1232
1233 if (!vpar)
1234 vpar++;
1235 count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar;
1236
1237 scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count);
1238 if (con_should_update(vc))
1239 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count);
1240 vc->vc_need_wrap = 0;
1241}
1242
1243static void default_attr(struct vc_data *vc)
1244{
1245 vc->vc_intensity = 1;
1246 vc->vc_italic = 0;
1247 vc->vc_underline = 0;
1248 vc->vc_reverse = 0;
1249 vc->vc_blink = 0;
1250 vc->vc_color = vc->vc_def_color;
1251}
1252
1253struct rgb { u8 r; u8 g; u8 b; };
1254
1255static void rgb_from_256(int i, struct rgb *c)
1256{
1257 if (i < 8) {
1258 c->r = i&1 ? 0xaa : 0x00;
1259 c->g = i&2 ? 0xaa : 0x00;
1260 c->b = i&4 ? 0xaa : 0x00;
1261 } else if (i < 16) {
1262 c->r = i&1 ? 0xff : 0x55;
1263 c->g = i&2 ? 0xff : 0x55;
1264 c->b = i&4 ? 0xff : 0x55;
1265 } else if (i < 232) {
1266 c->r = (i - 16) / 36 * 85 / 2;
1267 c->g = (i - 16) / 6 % 6 * 85 / 2;
1268 c->b = (i - 16) % 6 * 85 / 2;
1269 } else
1270 c->r = c->g = c->b = i * 10 - 2312;
1271}
1272
1273static void rgb_foreground(struct vc_data *vc, const struct rgb *c)
1274{
1275 u8 hue = 0, max = max3(c->r, c->g, c->b);
1276
1277 if (c->r > max / 2)
1278 hue |= 4;
1279 if (c->g > max / 2)
1280 hue |= 2;
1281 if (c->b > max / 2)
1282 hue |= 1;
1283
1284 if (hue == 7 && max <= 0x55) {
1285 hue = 0;
1286 vc->vc_intensity = 2;
1287 } else if (max > 0xaa)
1288 vc->vc_intensity = 2;
1289 else
1290 vc->vc_intensity = 1;
1291
1292 vc->vc_color = (vc->vc_color & 0xf0) | hue;
1293}
1294
1295static void rgb_background(struct vc_data *vc, const struct rgb *c)
1296{
1297
1298 vc->vc_color = (vc->vc_color & 0x0f)
1299 | (c->r&0x80) >> 1 | (c->g&0x80) >> 2 | (c->b&0x80) >> 3;
1300}
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311static int vc_t416_color(struct vc_data *vc, int i,
1312 void(*set_color)(struct vc_data *vc, const struct rgb *c))
1313{
1314 struct rgb c;
1315
1316 i++;
1317 if (i > vc->vc_npar)
1318 return i;
1319
1320 if (vc->vc_par[i] == 5 && i + 1 <= vc->vc_npar) {
1321
1322 i++;
1323 rgb_from_256(vc->vc_par[i], &c);
1324 } else if (vc->vc_par[i] == 2 && i + 3 <= vc->vc_npar) {
1325
1326 c.r = vc->vc_par[i + 1];
1327 c.g = vc->vc_par[i + 2];
1328 c.b = vc->vc_par[i + 3];
1329 i += 3;
1330 } else
1331 return i;
1332
1333 set_color(vc, &c);
1334
1335 return i;
1336}
1337
1338
1339static void csi_m(struct vc_data *vc)
1340{
1341 int i;
1342
1343 for (i = 0; i <= vc->vc_npar; i++)
1344 switch (vc->vc_par[i]) {
1345 case 0:
1346 default_attr(vc);
1347 break;
1348 case 1:
1349 vc->vc_intensity = 2;
1350 break;
1351 case 2:
1352 vc->vc_intensity = 0;
1353 break;
1354 case 3:
1355 vc->vc_italic = 1;
1356 break;
1357 case 4:
1358 vc->vc_underline = 1;
1359 break;
1360 case 5:
1361 vc->vc_blink = 1;
1362 break;
1363 case 7:
1364 vc->vc_reverse = 1;
1365 break;
1366 case 10:
1367
1368
1369
1370 vc->vc_translate = set_translate(vc->vc_charset == 0
1371 ? vc->vc_G0_charset
1372 : vc->vc_G1_charset, vc);
1373 vc->vc_disp_ctrl = 0;
1374 vc->vc_toggle_meta = 0;
1375 break;
1376 case 11:
1377
1378
1379
1380 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1381 vc->vc_disp_ctrl = 1;
1382 vc->vc_toggle_meta = 0;
1383 break;
1384 case 12:
1385
1386
1387
1388 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1389 vc->vc_disp_ctrl = 1;
1390 vc->vc_toggle_meta = 1;
1391 break;
1392 case 21:
1393 case 22:
1394 vc->vc_intensity = 1;
1395 break;
1396 case 23:
1397 vc->vc_italic = 0;
1398 break;
1399 case 24:
1400 vc->vc_underline = 0;
1401 break;
1402 case 25:
1403 vc->vc_blink = 0;
1404 break;
1405 case 27:
1406 vc->vc_reverse = 0;
1407 break;
1408 case 38:
1409 i = vc_t416_color(vc, i, rgb_foreground);
1410 break;
1411 case 48:
1412 i = vc_t416_color(vc, i, rgb_background);
1413 break;
1414 case 39:
1415 vc->vc_color = (vc->vc_def_color & 0x0f) |
1416 (vc->vc_color & 0xf0);
1417 break;
1418 case 49:
1419 vc->vc_color = (vc->vc_def_color & 0xf0) |
1420 (vc->vc_color & 0x0f);
1421 break;
1422 default:
1423 if (vc->vc_par[i] >= 90 && vc->vc_par[i] <= 107) {
1424 if (vc->vc_par[i] < 100)
1425 vc->vc_intensity = 2;
1426 vc->vc_par[i] -= 60;
1427 }
1428 if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37)
1429 vc->vc_color = color_table[vc->vc_par[i] - 30]
1430 | (vc->vc_color & 0xf0);
1431 else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47)
1432 vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4)
1433 | (vc->vc_color & 0x0f);
1434 break;
1435 }
1436 update_attr(vc);
1437}
1438
1439static void respond_string(const char *p, struct tty_port *port)
1440{
1441 while (*p) {
1442 tty_insert_flip_char(port, *p, 0);
1443 p++;
1444 }
1445 tty_schedule_flip(port);
1446}
1447
1448static void cursor_report(struct vc_data *vc, struct tty_struct *tty)
1449{
1450 char buf[40];
1451
1452 sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1);
1453 respond_string(buf, tty->port);
1454}
1455
1456static inline void status_report(struct tty_struct *tty)
1457{
1458 respond_string("\033[0n", tty->port);
1459}
1460
1461static inline void respond_ID(struct tty_struct *tty)
1462{
1463 respond_string(VT102ID, tty->port);
1464}
1465
1466void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry)
1467{
1468 char buf[8];
1469
1470 sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx),
1471 (char)('!' + mry));
1472 respond_string(buf, tty->port);
1473}
1474
1475
1476int mouse_reporting(void)
1477{
1478 return vc_cons[fg_console].d->vc_report_mouse;
1479}
1480
1481
1482static void set_mode(struct vc_data *vc, int on_off)
1483{
1484 int i;
1485
1486 for (i = 0; i <= vc->vc_npar; i++)
1487 if (vc->vc_ques) {
1488 switch(vc->vc_par[i]) {
1489 case 1:
1490 if (on_off)
1491 set_kbd(vc, decckm);
1492 else
1493 clr_kbd(vc, decckm);
1494 break;
1495 case 3:
1496#if 0
1497 vc_resize(deccolm ? 132 : 80, vc->vc_rows);
1498
1499
1500#endif
1501 break;
1502 case 5:
1503 if (vc->vc_decscnm != on_off) {
1504 vc->vc_decscnm = on_off;
1505 invert_screen(vc, 0, vc->vc_screenbuf_size, 0);
1506 update_attr(vc);
1507 }
1508 break;
1509 case 6:
1510 vc->vc_decom = on_off;
1511 gotoxay(vc, 0, 0);
1512 break;
1513 case 7:
1514 vc->vc_decawm = on_off;
1515 break;
1516 case 8:
1517 if (on_off)
1518 set_kbd(vc, decarm);
1519 else
1520 clr_kbd(vc, decarm);
1521 break;
1522 case 9:
1523 vc->vc_report_mouse = on_off ? 1 : 0;
1524 break;
1525 case 25:
1526 vc->vc_deccm = on_off;
1527 break;
1528 case 1000:
1529 vc->vc_report_mouse = on_off ? 2 : 0;
1530 break;
1531 }
1532 } else {
1533 switch(vc->vc_par[i]) {
1534 case 3:
1535 vc->vc_disp_ctrl = on_off;
1536 break;
1537 case 4:
1538 vc->vc_decim = on_off;
1539 break;
1540 case 20:
1541 if (on_off)
1542 set_kbd(vc, lnm);
1543 else
1544 clr_kbd(vc, lnm);
1545 break;
1546 }
1547 }
1548}
1549
1550
1551static void setterm_command(struct vc_data *vc)
1552{
1553 switch(vc->vc_par[0]) {
1554 case 1:
1555 if (vc->vc_can_do_color &&
1556 vc->vc_par[1] < 16) {
1557 vc->vc_ulcolor = color_table[vc->vc_par[1]];
1558 if (vc->vc_underline)
1559 update_attr(vc);
1560 }
1561 break;
1562 case 2:
1563 if (vc->vc_can_do_color &&
1564 vc->vc_par[1] < 16) {
1565 vc->vc_halfcolor = color_table[vc->vc_par[1]];
1566 if (vc->vc_intensity == 0)
1567 update_attr(vc);
1568 }
1569 break;
1570 case 8:
1571 vc->vc_def_color = vc->vc_attr;
1572 if (vc->vc_hi_font_mask == 0x100)
1573 vc->vc_def_color >>= 1;
1574 default_attr(vc);
1575 update_attr(vc);
1576 break;
1577 case 9:
1578 blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60;
1579 poke_blanked_console();
1580 break;
1581 case 10:
1582 if (vc->vc_npar >= 1)
1583 vc->vc_bell_pitch = vc->vc_par[1];
1584 else
1585 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1586 break;
1587 case 11:
1588 if (vc->vc_npar >= 1)
1589 vc->vc_bell_duration = (vc->vc_par[1] < 2000) ?
1590 msecs_to_jiffies(vc->vc_par[1]) : 0;
1591 else
1592 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1593 break;
1594 case 12:
1595 if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1))
1596 set_console(vc->vc_par[1] - 1);
1597 break;
1598 case 13:
1599 poke_blanked_console();
1600 break;
1601 case 14:
1602 vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1603 break;
1604 case 15:
1605 set_console(last_console);
1606 break;
1607 case 16:
1608 if (vc->vc_npar >= 1 && vc->vc_par[1] >= 50 &&
1609 vc->vc_par[1] <= USHRT_MAX)
1610 vc->vc_cur_blink_ms = vc->vc_par[1];
1611 else
1612 vc->vc_cur_blink_ms = DEFAULT_CURSOR_BLINK_MS;
1613 break;
1614 }
1615}
1616
1617
1618static void csi_at(struct vc_data *vc, unsigned int nr)
1619{
1620 if (nr > vc->vc_cols - vc->vc_x)
1621 nr = vc->vc_cols - vc->vc_x;
1622 else if (!nr)
1623 nr = 1;
1624 insert_char(vc, nr);
1625}
1626
1627
1628static void csi_L(struct vc_data *vc, unsigned int nr)
1629{
1630 if (nr > vc->vc_rows - vc->vc_y)
1631 nr = vc->vc_rows - vc->vc_y;
1632 else if (!nr)
1633 nr = 1;
1634 scrdown(vc, vc->vc_y, vc->vc_bottom, nr);
1635 vc->vc_need_wrap = 0;
1636}
1637
1638
1639static void csi_P(struct vc_data *vc, unsigned int nr)
1640{
1641 if (nr > vc->vc_cols - vc->vc_x)
1642 nr = vc->vc_cols - vc->vc_x;
1643 else if (!nr)
1644 nr = 1;
1645 delete_char(vc, nr);
1646}
1647
1648
1649static void csi_M(struct vc_data *vc, unsigned int nr)
1650{
1651 if (nr > vc->vc_rows - vc->vc_y)
1652 nr = vc->vc_rows - vc->vc_y;
1653 else if (!nr)
1654 nr=1;
1655 scrup(vc, vc->vc_y, vc->vc_bottom, nr);
1656 vc->vc_need_wrap = 0;
1657}
1658
1659
1660static void save_cur(struct vc_data *vc)
1661{
1662 vc->vc_saved_x = vc->vc_x;
1663 vc->vc_saved_y = vc->vc_y;
1664 vc->vc_s_intensity = vc->vc_intensity;
1665 vc->vc_s_italic = vc->vc_italic;
1666 vc->vc_s_underline = vc->vc_underline;
1667 vc->vc_s_blink = vc->vc_blink;
1668 vc->vc_s_reverse = vc->vc_reverse;
1669 vc->vc_s_charset = vc->vc_charset;
1670 vc->vc_s_color = vc->vc_color;
1671 vc->vc_saved_G0 = vc->vc_G0_charset;
1672 vc->vc_saved_G1 = vc->vc_G1_charset;
1673}
1674
1675
1676static void restore_cur(struct vc_data *vc)
1677{
1678 gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y);
1679 vc->vc_intensity = vc->vc_s_intensity;
1680 vc->vc_italic = vc->vc_s_italic;
1681 vc->vc_underline = vc->vc_s_underline;
1682 vc->vc_blink = vc->vc_s_blink;
1683 vc->vc_reverse = vc->vc_s_reverse;
1684 vc->vc_charset = vc->vc_s_charset;
1685 vc->vc_color = vc->vc_s_color;
1686 vc->vc_G0_charset = vc->vc_saved_G0;
1687 vc->vc_G1_charset = vc->vc_saved_G1;
1688 vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc);
1689 update_attr(vc);
1690 vc->vc_need_wrap = 0;
1691}
1692
1693enum { ESnormal, ESesc, ESsquare, ESgetpars, ESfunckey,
1694 EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd,
1695 ESpalette, ESosc };
1696
1697
1698static void reset_terminal(struct vc_data *vc, int do_clear)
1699{
1700 vc->vc_top = 0;
1701 vc->vc_bottom = vc->vc_rows;
1702 vc->vc_state = ESnormal;
1703 vc->vc_ques = 0;
1704 vc->vc_translate = set_translate(LAT1_MAP, vc);
1705 vc->vc_G0_charset = LAT1_MAP;
1706 vc->vc_G1_charset = GRAF_MAP;
1707 vc->vc_charset = 0;
1708 vc->vc_need_wrap = 0;
1709 vc->vc_report_mouse = 0;
1710 vc->vc_utf = default_utf8;
1711 vc->vc_utf_count = 0;
1712
1713 vc->vc_disp_ctrl = 0;
1714 vc->vc_toggle_meta = 0;
1715
1716 vc->vc_decscnm = 0;
1717 vc->vc_decom = 0;
1718 vc->vc_decawm = 1;
1719 vc->vc_deccm = global_cursor_default;
1720 vc->vc_decim = 0;
1721
1722 vt_reset_keyboard(vc->vc_num);
1723
1724 vc->vc_cursor_type = cur_default;
1725 vc->vc_complement_mask = vc->vc_s_complement_mask;
1726
1727 default_attr(vc);
1728 update_attr(vc);
1729
1730 vc->vc_tab_stop[0] = 0x01010100;
1731 vc->vc_tab_stop[1] =
1732 vc->vc_tab_stop[2] =
1733 vc->vc_tab_stop[3] =
1734 vc->vc_tab_stop[4] =
1735 vc->vc_tab_stop[5] =
1736 vc->vc_tab_stop[6] =
1737 vc->vc_tab_stop[7] = 0x01010101;
1738
1739 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1740 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1741 vc->vc_cur_blink_ms = DEFAULT_CURSOR_BLINK_MS;
1742
1743 gotoxy(vc, 0, 0);
1744 save_cur(vc);
1745 if (do_clear)
1746 csi_J(vc, 2);
1747}
1748
1749
1750static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
1751{
1752
1753
1754
1755
1756 if (vc->vc_state == ESosc && c>=8 && c<=13)
1757 return;
1758 switch (c) {
1759 case 0:
1760 return;
1761 case 7:
1762 if (vc->vc_state == ESosc)
1763 vc->vc_state = ESnormal;
1764 else if (vc->vc_bell_duration)
1765 kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration);
1766 return;
1767 case 8:
1768 bs(vc);
1769 return;
1770 case 9:
1771 vc->vc_pos -= (vc->vc_x << 1);
1772 while (vc->vc_x < vc->vc_cols - 1) {
1773 vc->vc_x++;
1774 if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31)))
1775 break;
1776 }
1777 vc->vc_pos += (vc->vc_x << 1);
1778 notify_write(vc, '\t');
1779 return;
1780 case 10: case 11: case 12:
1781 lf(vc);
1782 if (!is_kbd(vc, lnm))
1783 return;
1784 case 13:
1785 cr(vc);
1786 return;
1787 case 14:
1788 vc->vc_charset = 1;
1789 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1790 vc->vc_disp_ctrl = 1;
1791 return;
1792 case 15:
1793 vc->vc_charset = 0;
1794 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1795 vc->vc_disp_ctrl = 0;
1796 return;
1797 case 24: case 26:
1798 vc->vc_state = ESnormal;
1799 return;
1800 case 27:
1801 vc->vc_state = ESesc;
1802 return;
1803 case 127:
1804 del(vc);
1805 return;
1806 case 128+27:
1807 vc->vc_state = ESsquare;
1808 return;
1809 }
1810 switch(vc->vc_state) {
1811 case ESesc:
1812 vc->vc_state = ESnormal;
1813 switch (c) {
1814 case '[':
1815 vc->vc_state = ESsquare;
1816 return;
1817 case ']':
1818 vc->vc_state = ESnonstd;
1819 return;
1820 case '%':
1821 vc->vc_state = ESpercent;
1822 return;
1823 case 'E':
1824 cr(vc);
1825 lf(vc);
1826 return;
1827 case 'M':
1828 ri(vc);
1829 return;
1830 case 'D':
1831 lf(vc);
1832 return;
1833 case 'H':
1834 vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31));
1835 return;
1836 case 'Z':
1837 respond_ID(tty);
1838 return;
1839 case '7':
1840 save_cur(vc);
1841 return;
1842 case '8':
1843 restore_cur(vc);
1844 return;
1845 case '(':
1846 vc->vc_state = ESsetG0;
1847 return;
1848 case ')':
1849 vc->vc_state = ESsetG1;
1850 return;
1851 case '#':
1852 vc->vc_state = EShash;
1853 return;
1854 case 'c':
1855 reset_terminal(vc, 1);
1856 return;
1857 case '>':
1858 clr_kbd(vc, kbdapplic);
1859 return;
1860 case '=':
1861 set_kbd(vc, kbdapplic);
1862 return;
1863 }
1864 return;
1865 case ESnonstd:
1866 if (c=='P') {
1867 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1868 vc->vc_par[vc->vc_npar] = 0;
1869 vc->vc_npar = 0;
1870 vc->vc_state = ESpalette;
1871 return;
1872 } else if (c=='R') {
1873 reset_palette(vc);
1874 vc->vc_state = ESnormal;
1875 } else if (c>='0' && c<='9')
1876 vc->vc_state = ESosc;
1877 else
1878 vc->vc_state = ESnormal;
1879 return;
1880 case ESpalette:
1881 if (isxdigit(c)) {
1882 vc->vc_par[vc->vc_npar++] = hex_to_bin(c);
1883 if (vc->vc_npar == 7) {
1884 int i = vc->vc_par[0] * 3, j = 1;
1885 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1886 vc->vc_palette[i++] += vc->vc_par[j++];
1887 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1888 vc->vc_palette[i++] += vc->vc_par[j++];
1889 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1890 vc->vc_palette[i] += vc->vc_par[j];
1891 set_palette(vc);
1892 vc->vc_state = ESnormal;
1893 }
1894 } else
1895 vc->vc_state = ESnormal;
1896 return;
1897 case ESsquare:
1898 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1899 vc->vc_par[vc->vc_npar] = 0;
1900 vc->vc_npar = 0;
1901 vc->vc_state = ESgetpars;
1902 if (c == '[') {
1903 vc->vc_state=ESfunckey;
1904 return;
1905 }
1906 vc->vc_ques = (c == '?');
1907 if (vc->vc_ques)
1908 return;
1909 case ESgetpars:
1910 if (c == ';' && vc->vc_npar < NPAR - 1) {
1911 vc->vc_npar++;
1912 return;
1913 } else if (c>='0' && c<='9') {
1914 vc->vc_par[vc->vc_npar] *= 10;
1915 vc->vc_par[vc->vc_npar] += c - '0';
1916 return;
1917 }
1918 vc->vc_state = ESnormal;
1919 switch(c) {
1920 case 'h':
1921 set_mode(vc, 1);
1922 return;
1923 case 'l':
1924 set_mode(vc, 0);
1925 return;
1926 case 'c':
1927 if (vc->vc_ques) {
1928 if (vc->vc_par[0])
1929 vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16);
1930 else
1931 vc->vc_cursor_type = cur_default;
1932 return;
1933 }
1934 break;
1935 case 'm':
1936 if (vc->vc_ques) {
1937 clear_selection();
1938 if (vc->vc_par[0])
1939 vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1];
1940 else
1941 vc->vc_complement_mask = vc->vc_s_complement_mask;
1942 return;
1943 }
1944 break;
1945 case 'n':
1946 if (!vc->vc_ques) {
1947 if (vc->vc_par[0] == 5)
1948 status_report(tty);
1949 else if (vc->vc_par[0] == 6)
1950 cursor_report(vc, tty);
1951 }
1952 return;
1953 }
1954 if (vc->vc_ques) {
1955 vc->vc_ques = 0;
1956 return;
1957 }
1958 switch(c) {
1959 case 'G': case '`':
1960 if (vc->vc_par[0])
1961 vc->vc_par[0]--;
1962 gotoxy(vc, vc->vc_par[0], vc->vc_y);
1963 return;
1964 case 'A':
1965 if (!vc->vc_par[0])
1966 vc->vc_par[0]++;
1967 gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]);
1968 return;
1969 case 'B': case 'e':
1970 if (!vc->vc_par[0])
1971 vc->vc_par[0]++;
1972 gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]);
1973 return;
1974 case 'C': case 'a':
1975 if (!vc->vc_par[0])
1976 vc->vc_par[0]++;
1977 gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y);
1978 return;
1979 case 'D':
1980 if (!vc->vc_par[0])
1981 vc->vc_par[0]++;
1982 gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y);
1983 return;
1984 case 'E':
1985 if (!vc->vc_par[0])
1986 vc->vc_par[0]++;
1987 gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]);
1988 return;
1989 case 'F':
1990 if (!vc->vc_par[0])
1991 vc->vc_par[0]++;
1992 gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]);
1993 return;
1994 case 'd':
1995 if (vc->vc_par[0])
1996 vc->vc_par[0]--;
1997 gotoxay(vc, vc->vc_x ,vc->vc_par[0]);
1998 return;
1999 case 'H': case 'f':
2000 if (vc->vc_par[0])
2001 vc->vc_par[0]--;
2002 if (vc->vc_par[1])
2003 vc->vc_par[1]--;
2004 gotoxay(vc, vc->vc_par[1], vc->vc_par[0]);
2005 return;
2006 case 'J':
2007 csi_J(vc, vc->vc_par[0]);
2008 return;
2009 case 'K':
2010 csi_K(vc, vc->vc_par[0]);
2011 return;
2012 case 'L':
2013 csi_L(vc, vc->vc_par[0]);
2014 return;
2015 case 'M':
2016 csi_M(vc, vc->vc_par[0]);
2017 return;
2018 case 'P':
2019 csi_P(vc, vc->vc_par[0]);
2020 return;
2021 case 'c':
2022 if (!vc->vc_par[0])
2023 respond_ID(tty);
2024 return;
2025 case 'g':
2026 if (!vc->vc_par[0])
2027 vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31));
2028 else if (vc->vc_par[0] == 3) {
2029 vc->vc_tab_stop[0] =
2030 vc->vc_tab_stop[1] =
2031 vc->vc_tab_stop[2] =
2032 vc->vc_tab_stop[3] =
2033 vc->vc_tab_stop[4] =
2034 vc->vc_tab_stop[5] =
2035 vc->vc_tab_stop[6] =
2036 vc->vc_tab_stop[7] = 0;
2037 }
2038 return;
2039 case 'm':
2040 csi_m(vc);
2041 return;
2042 case 'q':
2043
2044 if (vc->vc_par[0] < 4)
2045 vt_set_led_state(vc->vc_num,
2046 (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4);
2047 return;
2048 case 'r':
2049 if (!vc->vc_par[0])
2050 vc->vc_par[0]++;
2051 if (!vc->vc_par[1])
2052 vc->vc_par[1] = vc->vc_rows;
2053
2054 if (vc->vc_par[0] < vc->vc_par[1] &&
2055 vc->vc_par[1] <= vc->vc_rows) {
2056 vc->vc_top = vc->vc_par[0] - 1;
2057 vc->vc_bottom = vc->vc_par[1];
2058 gotoxay(vc, 0, 0);
2059 }
2060 return;
2061 case 's':
2062 save_cur(vc);
2063 return;
2064 case 'u':
2065 restore_cur(vc);
2066 return;
2067 case 'X':
2068 csi_X(vc, vc->vc_par[0]);
2069 return;
2070 case '@':
2071 csi_at(vc, vc->vc_par[0]);
2072 return;
2073 case ']':
2074 setterm_command(vc);
2075 return;
2076 }
2077 return;
2078 case ESpercent:
2079 vc->vc_state = ESnormal;
2080 switch (c) {
2081 case '@':
2082 vc->vc_utf = 0;
2083 return;
2084 case 'G':
2085 case '8':
2086 vc->vc_utf = 1;
2087 return;
2088 }
2089 return;
2090 case ESfunckey:
2091 vc->vc_state = ESnormal;
2092 return;
2093 case EShash:
2094 vc->vc_state = ESnormal;
2095 if (c == '8') {
2096
2097 vc->vc_video_erase_char =
2098 (vc->vc_video_erase_char & 0xff00) | 'E';
2099 csi_J(vc, 2);
2100 vc->vc_video_erase_char =
2101 (vc->vc_video_erase_char & 0xff00) | ' ';
2102 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
2103 }
2104 return;
2105 case ESsetG0:
2106 if (c == '0')
2107 vc->vc_G0_charset = GRAF_MAP;
2108 else if (c == 'B')
2109 vc->vc_G0_charset = LAT1_MAP;
2110 else if (c == 'U')
2111 vc->vc_G0_charset = IBMPC_MAP;
2112 else if (c == 'K')
2113 vc->vc_G0_charset = USER_MAP;
2114 if (vc->vc_charset == 0)
2115 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
2116 vc->vc_state = ESnormal;
2117 return;
2118 case ESsetG1:
2119 if (c == '0')
2120 vc->vc_G1_charset = GRAF_MAP;
2121 else if (c == 'B')
2122 vc->vc_G1_charset = LAT1_MAP;
2123 else if (c == 'U')
2124 vc->vc_G1_charset = IBMPC_MAP;
2125 else if (c == 'K')
2126 vc->vc_G1_charset = USER_MAP;
2127 if (vc->vc_charset == 1)
2128 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
2129 vc->vc_state = ESnormal;
2130 return;
2131 case ESosc:
2132 return;
2133 default:
2134 vc->vc_state = ESnormal;
2135 }
2136}
2137
2138
2139
2140
2141
2142struct interval {
2143 uint32_t first;
2144 uint32_t last;
2145};
2146
2147static int bisearch(uint32_t ucs, const struct interval *table, int max)
2148{
2149 int min = 0;
2150 int mid;
2151
2152 if (ucs < table[0].first || ucs > table[max].last)
2153 return 0;
2154 while (max >= min) {
2155 mid = (min + max) / 2;
2156 if (ucs > table[mid].last)
2157 min = mid + 1;
2158 else if (ucs < table[mid].first)
2159 max = mid - 1;
2160 else
2161 return 1;
2162 }
2163 return 0;
2164}
2165
2166static int is_double_width(uint32_t ucs)
2167{
2168 static const struct interval double_width[] = {
2169 { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E },
2170 { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF },
2171 { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 },
2172 { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD }
2173 };
2174 return bisearch(ucs, double_width, ARRAY_SIZE(double_width) - 1);
2175}
2176
2177static void con_flush(struct vc_data *vc, unsigned long draw_from,
2178 unsigned long draw_to, int *draw_x)
2179{
2180 if (*draw_x < 0)
2181 return;
2182
2183 vc->vc_sw->con_putcs(vc, (u16 *)draw_from,
2184 (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, *draw_x);
2185 *draw_x = -1;
2186}
2187
2188
2189static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2190{
2191 int c, tc, ok, n = 0, draw_x = -1;
2192 unsigned int currcons;
2193 unsigned long draw_from = 0, draw_to = 0;
2194 struct vc_data *vc;
2195 unsigned char vc_attr;
2196 struct vt_notifier_param param;
2197 uint8_t rescan;
2198 uint8_t inverse;
2199 uint8_t width;
2200 u16 himask, charmask;
2201
2202 if (in_interrupt())
2203 return count;
2204
2205 might_sleep();
2206
2207 console_lock();
2208 vc = tty->driver_data;
2209 if (vc == NULL) {
2210 printk(KERN_ERR "vt: argh, driver_data is NULL !\n");
2211 console_unlock();
2212 return 0;
2213 }
2214
2215 currcons = vc->vc_num;
2216 if (!vc_cons_allocated(currcons)) {
2217
2218 pr_warn_once("con_write: tty %d not allocated\n", currcons+1);
2219 console_unlock();
2220 return 0;
2221 }
2222
2223 himask = vc->vc_hi_font_mask;
2224 charmask = himask ? 0x1ff : 0xff;
2225
2226
2227 if (con_is_fg(vc))
2228 hide_cursor(vc);
2229
2230 param.vc = vc;
2231
2232 while (!tty->stopped && count) {
2233 int orig = *buf;
2234 c = orig;
2235 buf++;
2236 n++;
2237 count--;
2238 rescan = 0;
2239 inverse = 0;
2240 width = 1;
2241
2242
2243 if (vc->vc_state != ESnormal) {
2244 tc = c;
2245 } else if (vc->vc_utf && !vc->vc_disp_ctrl) {
2246
2247
2248
2249
2250
2251
2252rescan_last_byte:
2253 if ((c & 0xc0) == 0x80) {
2254
2255 static const uint32_t utf8_length_changes[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff };
2256 if (vc->vc_utf_count) {
2257 vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f);
2258 vc->vc_npar++;
2259 if (--vc->vc_utf_count) {
2260
2261 continue;
2262 }
2263
2264 c = vc->vc_utf_char;
2265
2266 if (c <= utf8_length_changes[vc->vc_npar - 1] ||
2267 c > utf8_length_changes[vc->vc_npar])
2268 c = 0xfffd;
2269 } else {
2270
2271 vc->vc_utf_count = 0;
2272 c = 0xfffd;
2273 }
2274 } else {
2275
2276 if (vc->vc_utf_count) {
2277
2278 rescan = 1;
2279 vc->vc_utf_count = 0;
2280 c = 0xfffd;
2281 } else if (c > 0x7f) {
2282
2283 vc->vc_npar = 0;
2284 if ((c & 0xe0) == 0xc0) {
2285 vc->vc_utf_count = 1;
2286 vc->vc_utf_char = (c & 0x1f);
2287 } else if ((c & 0xf0) == 0xe0) {
2288 vc->vc_utf_count = 2;
2289 vc->vc_utf_char = (c & 0x0f);
2290 } else if ((c & 0xf8) == 0xf0) {
2291 vc->vc_utf_count = 3;
2292 vc->vc_utf_char = (c & 0x07);
2293 } else if ((c & 0xfc) == 0xf8) {
2294 vc->vc_utf_count = 4;
2295 vc->vc_utf_char = (c & 0x03);
2296 } else if ((c & 0xfe) == 0xfc) {
2297 vc->vc_utf_count = 5;
2298 vc->vc_utf_char = (c & 0x01);
2299 } else {
2300
2301 c = 0xfffd;
2302 }
2303 if (vc->vc_utf_count) {
2304
2305 continue;
2306 }
2307 }
2308
2309 }
2310
2311
2312
2313 if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff)
2314 c = 0xfffd;
2315 tc = c;
2316 } else {
2317 tc = vc_translate(vc, c);
2318 }
2319
2320 param.c = tc;
2321 if (atomic_notifier_call_chain(&vt_notifier_list, VT_PREWRITE,
2322 ¶m) == NOTIFY_STOP)
2323 continue;
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335 ok = tc && (c >= 32 ||
2336 !(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 :
2337 vc->vc_utf || ((CTRL_ACTION >> c) & 1)))
2338 && (c != 127 || vc->vc_disp_ctrl)
2339 && (c != 128+27);
2340
2341 if (vc->vc_state == ESnormal && ok) {
2342 if (vc->vc_utf && !vc->vc_disp_ctrl) {
2343 if (is_double_width(c))
2344 width = 2;
2345 }
2346
2347 tc = conv_uni_to_pc(vc, tc);
2348 if (tc & ~charmask) {
2349 if (tc == -1 || tc == -2) {
2350 continue;
2351 }
2352
2353 if ((!(vc->vc_utf && !vc->vc_disp_ctrl) || c < 128) && !(c & ~charmask)) {
2354
2355
2356
2357
2358
2359 tc = c;
2360 } else {
2361
2362 tc = conv_uni_to_pc(vc, 0xfffd);
2363 if (tc < 0) {
2364 inverse = 1;
2365 tc = conv_uni_to_pc(vc, '?');
2366 if (tc < 0) tc = '?';
2367 }
2368 }
2369 }
2370
2371 if (!inverse) {
2372 vc_attr = vc->vc_attr;
2373 } else {
2374
2375 if (!vc->vc_can_do_color) {
2376 vc_attr = (vc->vc_attr) ^ 0x08;
2377 } else if (vc->vc_hi_font_mask == 0x100) {
2378 vc_attr = ((vc->vc_attr) & 0x11) | (((vc->vc_attr) & 0xe0) >> 4) | (((vc->vc_attr) & 0x0e) << 4);
2379 } else {
2380 vc_attr = ((vc->vc_attr) & 0x88) | (((vc->vc_attr) & 0x70) >> 4) | (((vc->vc_attr) & 0x07) << 4);
2381 }
2382 con_flush(vc, draw_from, draw_to, &draw_x);
2383 }
2384
2385 while (1) {
2386 if (vc->vc_need_wrap || vc->vc_decim)
2387 con_flush(vc, draw_from, draw_to,
2388 &draw_x);
2389 if (vc->vc_need_wrap) {
2390 cr(vc);
2391 lf(vc);
2392 }
2393 if (vc->vc_decim)
2394 insert_char(vc, 1);
2395 scr_writew(himask ?
2396 ((vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) :
2397 (vc_attr << 8) + tc,
2398 (u16 *) vc->vc_pos);
2399 if (con_should_update(vc) && draw_x < 0) {
2400 draw_x = vc->vc_x;
2401 draw_from = vc->vc_pos;
2402 }
2403 if (vc->vc_x == vc->vc_cols - 1) {
2404 vc->vc_need_wrap = vc->vc_decawm;
2405 draw_to = vc->vc_pos + 2;
2406 } else {
2407 vc->vc_x++;
2408 draw_to = (vc->vc_pos += 2);
2409 }
2410
2411 if (!--width) break;
2412
2413 tc = conv_uni_to_pc(vc, ' ');
2414 if (tc < 0) tc = ' ';
2415 }
2416 notify_write(vc, c);
2417
2418 if (inverse)
2419 con_flush(vc, draw_from, draw_to, &draw_x);
2420
2421 if (rescan) {
2422 rescan = 0;
2423 inverse = 0;
2424 width = 1;
2425 c = orig;
2426 goto rescan_last_byte;
2427 }
2428 continue;
2429 }
2430 con_flush(vc, draw_from, draw_to, &draw_x);
2431 do_con_trol(tty, vc, orig);
2432 }
2433 con_flush(vc, draw_from, draw_to, &draw_x);
2434 console_conditional_schedule();
2435 console_unlock();
2436 notify_update(vc);
2437 return n;
2438}
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449static void console_callback(struct work_struct *ignored)
2450{
2451 console_lock();
2452
2453 if (want_console >= 0) {
2454 if (want_console != fg_console &&
2455 vc_cons_allocated(want_console)) {
2456 hide_cursor(vc_cons[fg_console].d);
2457 change_console(vc_cons[want_console].d);
2458
2459
2460
2461 }
2462 want_console = -1;
2463 }
2464 if (do_poke_blanked_console) {
2465 do_poke_blanked_console = 0;
2466 poke_blanked_console();
2467 }
2468 if (scrollback_delta) {
2469 struct vc_data *vc = vc_cons[fg_console].d;
2470 clear_selection();
2471 if (vc->vc_mode == KD_TEXT && vc->vc_sw->con_scrolldelta)
2472 vc->vc_sw->con_scrolldelta(vc, scrollback_delta);
2473 scrollback_delta = 0;
2474 }
2475 if (blank_timer_expired) {
2476 do_blank_screen(0);
2477 blank_timer_expired = 0;
2478 }
2479 notify_update(vc_cons[fg_console].d);
2480
2481 console_unlock();
2482}
2483
2484int set_console(int nr)
2485{
2486 struct vc_data *vc = vc_cons[fg_console].d;
2487
2488 if (!vc_cons_allocated(nr) || vt_dont_switch ||
2489 (vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) {
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499 return -EINVAL;
2500 }
2501
2502 want_console = nr;
2503 schedule_console_callback();
2504
2505 return 0;
2506}
2507
2508struct tty_driver *console_driver;
2509
2510#ifdef CONFIG_VT_CONSOLE
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533int vt_kmsg_redirect(int new)
2534{
2535 static int kmsg_con;
2536
2537 if (new != -1)
2538 return xchg(&kmsg_con, new);
2539 else
2540 return kmsg_con;
2541}
2542
2543
2544
2545
2546
2547
2548
2549static void vt_console_print(struct console *co, const char *b, unsigned count)
2550{
2551 struct vc_data *vc = vc_cons[fg_console].d;
2552 unsigned char c;
2553 static DEFINE_SPINLOCK(printing_lock);
2554 const ushort *start;
2555 ushort cnt = 0;
2556 ushort myx;
2557 int kmsg_console;
2558
2559
2560 if (!printable)
2561 return;
2562 if (!spin_trylock(&printing_lock))
2563 return;
2564
2565 kmsg_console = vt_get_kmsg_redirect();
2566 if (kmsg_console && vc_cons_allocated(kmsg_console - 1))
2567 vc = vc_cons[kmsg_console - 1].d;
2568
2569
2570
2571 myx = vc->vc_x;
2572
2573 if (!vc_cons_allocated(fg_console)) {
2574
2575
2576 goto quit;
2577 }
2578
2579 if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc))
2580 goto quit;
2581
2582
2583 if (con_is_fg(vc))
2584 hide_cursor(vc);
2585
2586 start = (ushort *)vc->vc_pos;
2587
2588
2589
2590 while (count--) {
2591 c = *b++;
2592 if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) {
2593 if (cnt > 0) {
2594 if (con_is_visible(vc))
2595 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2596 vc->vc_x += cnt;
2597 if (vc->vc_need_wrap)
2598 vc->vc_x--;
2599 cnt = 0;
2600 }
2601 if (c == 8) {
2602 bs(vc);
2603 start = (ushort *)vc->vc_pos;
2604 myx = vc->vc_x;
2605 continue;
2606 }
2607 if (c != 13)
2608 lf(vc);
2609 cr(vc);
2610 start = (ushort *)vc->vc_pos;
2611 myx = vc->vc_x;
2612 if (c == 10 || c == 13)
2613 continue;
2614 }
2615 scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos);
2616 notify_write(vc, c);
2617 cnt++;
2618 if (myx == vc->vc_cols - 1) {
2619 vc->vc_need_wrap = 1;
2620 continue;
2621 }
2622 vc->vc_pos += 2;
2623 myx++;
2624 }
2625 if (cnt > 0) {
2626 if (con_is_visible(vc))
2627 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2628 vc->vc_x += cnt;
2629 if (vc->vc_x == vc->vc_cols) {
2630 vc->vc_x--;
2631 vc->vc_need_wrap = 1;
2632 }
2633 }
2634 set_cursor(vc);
2635 notify_update(vc);
2636
2637quit:
2638 spin_unlock(&printing_lock);
2639}
2640
2641static struct tty_driver *vt_console_device(struct console *c, int *index)
2642{
2643 *index = c->index ? c->index-1 : fg_console;
2644 return console_driver;
2645}
2646
2647static struct console vt_console_driver = {
2648 .name = "tty",
2649 .write = vt_console_print,
2650 .device = vt_console_device,
2651 .unblank = unblank_screen,
2652 .flags = CON_PRINTBUFFER,
2653 .index = -1,
2654};
2655#endif
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672int tioclinux(struct tty_struct *tty, unsigned long arg)
2673{
2674 char type, data;
2675 char __user *p = (char __user *)arg;
2676 int lines;
2677 int ret;
2678
2679 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN))
2680 return -EPERM;
2681 if (get_user(type, p))
2682 return -EFAULT;
2683 ret = 0;
2684
2685 switch (type)
2686 {
2687 case TIOCL_SETSEL:
2688 console_lock();
2689 ret = set_selection((struct tiocl_selection __user *)(p+1), tty);
2690 console_unlock();
2691 break;
2692 case TIOCL_PASTESEL:
2693 ret = paste_selection(tty);
2694 break;
2695 case TIOCL_UNBLANKSCREEN:
2696 console_lock();
2697 unblank_screen();
2698 console_unlock();
2699 break;
2700 case TIOCL_SELLOADLUT:
2701 console_lock();
2702 ret = sel_loadlut(p);
2703 console_unlock();
2704 break;
2705 case TIOCL_GETSHIFTSTATE:
2706
2707
2708
2709
2710
2711
2712
2713 data = vt_get_shift_state();
2714 ret = __put_user(data, p);
2715 break;
2716 case TIOCL_GETMOUSEREPORTING:
2717 console_lock();
2718 data = mouse_reporting();
2719 console_unlock();
2720 ret = __put_user(data, p);
2721 break;
2722 case TIOCL_SETVESABLANK:
2723 console_lock();
2724 ret = set_vesa_blanking(p);
2725 console_unlock();
2726 break;
2727 case TIOCL_GETKMSGREDIRECT:
2728 data = vt_get_kmsg_redirect();
2729 ret = __put_user(data, p);
2730 break;
2731 case TIOCL_SETKMSGREDIRECT:
2732 if (!capable(CAP_SYS_ADMIN)) {
2733 ret = -EPERM;
2734 } else {
2735 if (get_user(data, p+1))
2736 ret = -EFAULT;
2737 else
2738 vt_kmsg_redirect(data);
2739 }
2740 break;
2741 case TIOCL_GETFGCONSOLE:
2742
2743
2744
2745 ret = fg_console;
2746 break;
2747 case TIOCL_SCROLLCONSOLE:
2748 if (get_user(lines, (s32 __user *)(p+4))) {
2749 ret = -EFAULT;
2750 } else {
2751
2752
2753
2754 console_lock();
2755 scrollfront(vc_cons[fg_console].d, lines);
2756 console_unlock();
2757 ret = 0;
2758 }
2759 break;
2760 case TIOCL_BLANKSCREEN:
2761 console_lock();
2762 ignore_poke = 1;
2763 do_blank_screen(0);
2764 console_unlock();
2765 break;
2766 case TIOCL_BLANKEDSCREEN:
2767 ret = console_blanked;
2768 break;
2769 default:
2770 ret = -EINVAL;
2771 break;
2772 }
2773 return ret;
2774}
2775
2776
2777
2778
2779
2780static int con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2781{
2782 int retval;
2783
2784 retval = do_con_write(tty, buf, count);
2785 con_flush_chars(tty);
2786
2787 return retval;
2788}
2789
2790static int con_put_char(struct tty_struct *tty, unsigned char ch)
2791{
2792 if (in_interrupt())
2793 return 0;
2794 return do_con_write(tty, &ch, 1);
2795}
2796
2797static int con_write_room(struct tty_struct *tty)
2798{
2799 if (tty->stopped)
2800 return 0;
2801 return 32768;
2802}
2803
2804static int con_chars_in_buffer(struct tty_struct *tty)
2805{
2806 return 0;
2807}
2808
2809
2810
2811
2812
2813
2814static void con_throttle(struct tty_struct *tty)
2815{
2816}
2817
2818static void con_unthrottle(struct tty_struct *tty)
2819{
2820 struct vc_data *vc = tty->driver_data;
2821
2822 wake_up_interruptible(&vc->paste_wait);
2823}
2824
2825
2826
2827
2828static void con_stop(struct tty_struct *tty)
2829{
2830 int console_num;
2831 if (!tty)
2832 return;
2833 console_num = tty->index;
2834 if (!vc_cons_allocated(console_num))
2835 return;
2836 vt_kbd_con_stop(console_num);
2837}
2838
2839
2840
2841
2842static void con_start(struct tty_struct *tty)
2843{
2844 int console_num;
2845 if (!tty)
2846 return;
2847 console_num = tty->index;
2848 if (!vc_cons_allocated(console_num))
2849 return;
2850 vt_kbd_con_start(console_num);
2851}
2852
2853static void con_flush_chars(struct tty_struct *tty)
2854{
2855 struct vc_data *vc;
2856
2857 if (in_interrupt())
2858 return;
2859
2860
2861 console_lock();
2862 vc = tty->driver_data;
2863 if (vc)
2864 set_cursor(vc);
2865 console_unlock();
2866}
2867
2868
2869
2870
2871static int con_install(struct tty_driver *driver, struct tty_struct *tty)
2872{
2873 unsigned int currcons = tty->index;
2874 struct vc_data *vc;
2875 int ret;
2876
2877 console_lock();
2878 ret = vc_allocate(currcons);
2879 if (ret)
2880 goto unlock;
2881
2882 vc = vc_cons[currcons].d;
2883
2884
2885 if (vc->port.tty) {
2886 ret = -ERESTARTSYS;
2887 goto unlock;
2888 }
2889
2890 ret = tty_port_install(&vc->port, driver, tty);
2891 if (ret)
2892 goto unlock;
2893
2894 tty->driver_data = vc;
2895 vc->port.tty = tty;
2896
2897 if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
2898 tty->winsize.ws_row = vc_cons[currcons].d->vc_rows;
2899 tty->winsize.ws_col = vc_cons[currcons].d->vc_cols;
2900 }
2901 if (vc->vc_utf)
2902 tty->termios.c_iflag |= IUTF8;
2903 else
2904 tty->termios.c_iflag &= ~IUTF8;
2905unlock:
2906 console_unlock();
2907 return ret;
2908}
2909
2910static int con_open(struct tty_struct *tty, struct file *filp)
2911{
2912
2913 return 0;
2914}
2915
2916
2917static void con_close(struct tty_struct *tty, struct file *filp)
2918{
2919
2920}
2921
2922static void con_shutdown(struct tty_struct *tty)
2923{
2924 struct vc_data *vc = tty->driver_data;
2925 BUG_ON(vc == NULL);
2926 console_lock();
2927 vc->port.tty = NULL;
2928 console_unlock();
2929}
2930
2931static int default_color = 7;
2932static int default_italic_color = 2;
2933static int default_underline_color = 3;
2934module_param_named(color, default_color, int, S_IRUGO | S_IWUSR);
2935module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR);
2936module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR);
2937
2938static void vc_init(struct vc_data *vc, unsigned int rows,
2939 unsigned int cols, int do_clear)
2940{
2941 int j, k ;
2942
2943 vc->vc_cols = cols;
2944 vc->vc_rows = rows;
2945 vc->vc_size_row = cols << 1;
2946 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
2947
2948 set_origin(vc);
2949 vc->vc_pos = vc->vc_origin;
2950 reset_vc(vc);
2951 for (j=k=0; j<16; j++) {
2952 vc->vc_palette[k++] = default_red[j] ;
2953 vc->vc_palette[k++] = default_grn[j] ;
2954 vc->vc_palette[k++] = default_blu[j] ;
2955 }
2956 vc->vc_def_color = default_color;
2957 vc->vc_ulcolor = default_underline_color;
2958 vc->vc_itcolor = default_italic_color;
2959 vc->vc_halfcolor = 0x08;
2960 init_waitqueue_head(&vc->paste_wait);
2961 reset_terminal(vc, do_clear);
2962}
2963
2964
2965
2966
2967
2968
2969
2970static int __init con_init(void)
2971{
2972 const char *display_desc = NULL;
2973 struct vc_data *vc;
2974 unsigned int currcons = 0, i;
2975
2976 console_lock();
2977
2978 if (conswitchp)
2979 display_desc = conswitchp->con_startup();
2980 if (!display_desc) {
2981 fg_console = 0;
2982 console_unlock();
2983 return 0;
2984 }
2985
2986 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2987 struct con_driver *con_driver = ®istered_con_driver[i];
2988
2989 if (con_driver->con == NULL) {
2990 con_driver->con = conswitchp;
2991 con_driver->desc = display_desc;
2992 con_driver->flag = CON_DRIVER_FLAG_INIT;
2993 con_driver->first = 0;
2994 con_driver->last = MAX_NR_CONSOLES - 1;
2995 break;
2996 }
2997 }
2998
2999 for (i = 0; i < MAX_NR_CONSOLES; i++)
3000 con_driver_map[i] = conswitchp;
3001
3002 if (blankinterval) {
3003 blank_state = blank_normal_wait;
3004 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
3005 }
3006
3007 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) {
3008 vc_cons[currcons].d = vc = kzalloc(sizeof(struct vc_data), GFP_NOWAIT);
3009 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
3010 tty_port_init(&vc->port);
3011 visual_init(vc, currcons, 1);
3012 vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_NOWAIT);
3013 vc_init(vc, vc->vc_rows, vc->vc_cols,
3014 currcons || !vc->vc_sw->con_save_screen);
3015 }
3016 currcons = fg_console = 0;
3017 master_display_fg = vc = vc_cons[currcons].d;
3018 set_origin(vc);
3019 save_screen(vc);
3020 gotoxy(vc, vc->vc_x, vc->vc_y);
3021 csi_J(vc, 0);
3022 update_screen(vc);
3023 pr_info("Console: %s %s %dx%d\n",
3024 vc->vc_can_do_color ? "colour" : "mono",
3025 display_desc, vc->vc_cols, vc->vc_rows);
3026 printable = 1;
3027
3028 console_unlock();
3029
3030#ifdef CONFIG_VT_CONSOLE
3031 register_console(&vt_console_driver);
3032#endif
3033 return 0;
3034}
3035console_initcall(con_init);
3036
3037static const struct tty_operations con_ops = {
3038 .install = con_install,
3039 .open = con_open,
3040 .close = con_close,
3041 .write = con_write,
3042 .write_room = con_write_room,
3043 .put_char = con_put_char,
3044 .flush_chars = con_flush_chars,
3045 .chars_in_buffer = con_chars_in_buffer,
3046 .ioctl = vt_ioctl,
3047#ifdef CONFIG_COMPAT
3048 .compat_ioctl = vt_compat_ioctl,
3049#endif
3050 .stop = con_stop,
3051 .start = con_start,
3052 .throttle = con_throttle,
3053 .unthrottle = con_unthrottle,
3054 .resize = vt_resize,
3055 .shutdown = con_shutdown
3056};
3057
3058static struct cdev vc0_cdev;
3059
3060static ssize_t show_tty_active(struct device *dev,
3061 struct device_attribute *attr, char *buf)
3062{
3063 return sprintf(buf, "tty%d\n", fg_console + 1);
3064}
3065static DEVICE_ATTR(active, S_IRUGO, show_tty_active, NULL);
3066
3067static struct attribute *vt_dev_attrs[] = {
3068 &dev_attr_active.attr,
3069 NULL
3070};
3071
3072ATTRIBUTE_GROUPS(vt_dev);
3073
3074int __init vty_init(const struct file_operations *console_fops)
3075{
3076 cdev_init(&vc0_cdev, console_fops);
3077 if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) ||
3078 register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0)
3079 panic("Couldn't register /dev/tty0 driver\n");
3080 tty0dev = device_create_with_groups(tty_class, NULL,
3081 MKDEV(TTY_MAJOR, 0), NULL,
3082 vt_dev_groups, "tty0");
3083 if (IS_ERR(tty0dev))
3084 tty0dev = NULL;
3085
3086 vcs_init();
3087
3088 console_driver = alloc_tty_driver(MAX_NR_CONSOLES);
3089 if (!console_driver)
3090 panic("Couldn't allocate console driver\n");
3091
3092 console_driver->name = "tty";
3093 console_driver->name_base = 1;
3094 console_driver->major = TTY_MAJOR;
3095 console_driver->minor_start = 1;
3096 console_driver->type = TTY_DRIVER_TYPE_CONSOLE;
3097 console_driver->init_termios = tty_std_termios;
3098 if (default_utf8)
3099 console_driver->init_termios.c_iflag |= IUTF8;
3100 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS;
3101 tty_set_operations(console_driver, &con_ops);
3102 if (tty_register_driver(console_driver))
3103 panic("Couldn't register console driver\n");
3104 kbd_init();
3105 console_map_init();
3106#ifdef CONFIG_MDA_CONSOLE
3107 mda_console_init();
3108#endif
3109 return 0;
3110}
3111
3112#ifndef VT_SINGLE_DRIVER
3113
3114static struct class *vtconsole_class;
3115
3116static int do_bind_con_driver(const struct consw *csw, int first, int last,
3117 int deflt)
3118{
3119 struct module *owner = csw->owner;
3120 const char *desc = NULL;
3121 struct con_driver *con_driver;
3122 int i, j = -1, k = -1, retval = -ENODEV;
3123
3124 if (!try_module_get(owner))
3125 return -ENODEV;
3126
3127 WARN_CONSOLE_UNLOCKED();
3128
3129
3130 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3131 con_driver = ®istered_con_driver[i];
3132
3133 if (con_driver->con == csw) {
3134 desc = con_driver->desc;
3135 retval = 0;
3136 break;
3137 }
3138 }
3139
3140 if (retval)
3141 goto err;
3142
3143 if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) {
3144 csw->con_startup();
3145 con_driver->flag |= CON_DRIVER_FLAG_INIT;
3146 }
3147
3148 if (deflt) {
3149 if (conswitchp)
3150 module_put(conswitchp->owner);
3151
3152 __module_get(owner);
3153 conswitchp = csw;
3154 }
3155
3156 first = max(first, con_driver->first);
3157 last = min(last, con_driver->last);
3158
3159 for (i = first; i <= last; i++) {
3160 int old_was_color;
3161 struct vc_data *vc = vc_cons[i].d;
3162
3163 if (con_driver_map[i])
3164 module_put(con_driver_map[i]->owner);
3165 __module_get(owner);
3166 con_driver_map[i] = csw;
3167
3168 if (!vc || !vc->vc_sw)
3169 continue;
3170
3171 j = i;
3172
3173 if (con_is_visible(vc)) {
3174 k = i;
3175 save_screen(vc);
3176 }
3177
3178 old_was_color = vc->vc_can_do_color;
3179 vc->vc_sw->con_deinit(vc);
3180 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
3181 visual_init(vc, i, 0);
3182 set_origin(vc);
3183 update_attr(vc);
3184
3185
3186
3187
3188
3189 if (old_was_color != vc->vc_can_do_color)
3190 clear_buffer_attributes(vc);
3191 }
3192
3193 pr_info("Console: switching ");
3194 if (!deflt)
3195 printk(KERN_CONT "consoles %d-%d ", first+1, last+1);
3196 if (j >= 0) {
3197 struct vc_data *vc = vc_cons[j].d;
3198
3199 printk(KERN_CONT "to %s %s %dx%d\n",
3200 vc->vc_can_do_color ? "colour" : "mono",
3201 desc, vc->vc_cols, vc->vc_rows);
3202
3203 if (k >= 0) {
3204 vc = vc_cons[k].d;
3205 update_screen(vc);
3206 }
3207 } else
3208 printk(KERN_CONT "to %s\n", desc);
3209
3210 retval = 0;
3211err:
3212 module_put(owner);
3213 return retval;
3214};
3215
3216
3217#ifdef CONFIG_VT_HW_CONSOLE_BINDING
3218
3219int do_unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
3220{
3221 struct module *owner = csw->owner;
3222 const struct consw *defcsw = NULL;
3223 struct con_driver *con_driver = NULL, *con_back = NULL;
3224 int i, retval = -ENODEV;
3225
3226 if (!try_module_get(owner))
3227 return -ENODEV;
3228
3229 WARN_CONSOLE_UNLOCKED();
3230
3231
3232 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3233 con_driver = ®istered_con_driver[i];
3234
3235 if (con_driver->con == csw &&
3236 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3237 retval = 0;
3238 break;
3239 }
3240 }
3241
3242 if (retval)
3243 goto err;
3244
3245 retval = -ENODEV;
3246
3247
3248 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3249 con_back = ®istered_con_driver[i];
3250
3251 if (con_back->con && con_back->con != csw) {
3252 defcsw = con_back->con;
3253 retval = 0;
3254 break;
3255 }
3256 }
3257
3258 if (retval)
3259 goto err;
3260
3261 if (!con_is_bound(csw))
3262 goto err;
3263
3264 first = max(first, con_driver->first);
3265 last = min(last, con_driver->last);
3266
3267 for (i = first; i <= last; i++) {
3268 if (con_driver_map[i] == csw) {
3269 module_put(csw->owner);
3270 con_driver_map[i] = NULL;
3271 }
3272 }
3273
3274 if (!con_is_bound(defcsw)) {
3275 const struct consw *defconsw = conswitchp;
3276
3277 defcsw->con_startup();
3278 con_back->flag |= CON_DRIVER_FLAG_INIT;
3279
3280
3281
3282
3283 conswitchp = defconsw;
3284 }
3285
3286 if (!con_is_bound(csw))
3287 con_driver->flag &= ~CON_DRIVER_FLAG_INIT;
3288
3289
3290 do_bind_con_driver(defcsw, first, last, deflt);
3291err:
3292 module_put(owner);
3293 return retval;
3294
3295}
3296EXPORT_SYMBOL_GPL(do_unbind_con_driver);
3297
3298static int vt_bind(struct con_driver *con)
3299{
3300 const struct consw *defcsw = NULL, *csw = NULL;
3301 int i, more = 1, first = -1, last = -1, deflt = 0;
3302
3303 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE))
3304 goto err;
3305
3306 csw = con->con;
3307
3308 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3309 struct con_driver *con = ®istered_con_driver[i];
3310
3311 if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) {
3312 defcsw = con->con;
3313 break;
3314 }
3315 }
3316
3317 if (!defcsw)
3318 goto err;
3319
3320 while (more) {
3321 more = 0;
3322
3323 for (i = con->first; i <= con->last; i++) {
3324 if (con_driver_map[i] == defcsw) {
3325 if (first == -1)
3326 first = i;
3327 last = i;
3328 more = 1;
3329 } else if (first != -1)
3330 break;
3331 }
3332
3333 if (first == 0 && last == MAX_NR_CONSOLES -1)
3334 deflt = 1;
3335
3336 if (first != -1)
3337 do_bind_con_driver(csw, first, last, deflt);
3338
3339 first = -1;
3340 last = -1;
3341 deflt = 0;
3342 }
3343
3344err:
3345 return 0;
3346}
3347
3348static int vt_unbind(struct con_driver *con)
3349{
3350 const struct consw *csw = NULL;
3351 int i, more = 1, first = -1, last = -1, deflt = 0;
3352 int ret;
3353
3354 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE))
3355 goto err;
3356
3357 csw = con->con;
3358
3359 while (more) {
3360 more = 0;
3361
3362 for (i = con->first; i <= con->last; i++) {
3363 if (con_driver_map[i] == csw) {
3364 if (first == -1)
3365 first = i;
3366 last = i;
3367 more = 1;
3368 } else if (first != -1)
3369 break;
3370 }
3371
3372 if (first == 0 && last == MAX_NR_CONSOLES -1)
3373 deflt = 1;
3374
3375 if (first != -1) {
3376 ret = do_unbind_con_driver(csw, first, last, deflt);
3377 if (ret != 0)
3378 return ret;
3379 }
3380
3381 first = -1;
3382 last = -1;
3383 deflt = 0;
3384 }
3385
3386err:
3387 return 0;
3388}
3389#else
3390static inline int vt_bind(struct con_driver *con)
3391{
3392 return 0;
3393}
3394static inline int vt_unbind(struct con_driver *con)
3395{
3396 return 0;
3397}
3398#endif
3399
3400static ssize_t store_bind(struct device *dev, struct device_attribute *attr,
3401 const char *buf, size_t count)
3402{
3403 struct con_driver *con = dev_get_drvdata(dev);
3404 int bind = simple_strtoul(buf, NULL, 0);
3405
3406 console_lock();
3407
3408 if (bind)
3409 vt_bind(con);
3410 else
3411 vt_unbind(con);
3412
3413 console_unlock();
3414
3415 return count;
3416}
3417
3418static ssize_t show_bind(struct device *dev, struct device_attribute *attr,
3419 char *buf)
3420{
3421 struct con_driver *con = dev_get_drvdata(dev);
3422 int bind = con_is_bound(con->con);
3423
3424 return snprintf(buf, PAGE_SIZE, "%i\n", bind);
3425}
3426
3427static ssize_t show_name(struct device *dev, struct device_attribute *attr,
3428 char *buf)
3429{
3430 struct con_driver *con = dev_get_drvdata(dev);
3431
3432 return snprintf(buf, PAGE_SIZE, "%s %s\n",
3433 (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)",
3434 con->desc);
3435
3436}
3437
3438static DEVICE_ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind);
3439static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
3440
3441static struct attribute *con_dev_attrs[] = {
3442 &dev_attr_bind.attr,
3443 &dev_attr_name.attr,
3444 NULL
3445};
3446
3447ATTRIBUTE_GROUPS(con_dev);
3448
3449static int vtconsole_init_device(struct con_driver *con)
3450{
3451 con->flag |= CON_DRIVER_FLAG_ATTR;
3452 return 0;
3453}
3454
3455static void vtconsole_deinit_device(struct con_driver *con)
3456{
3457 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3458}
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469int con_is_bound(const struct consw *csw)
3470{
3471 int i, bound = 0;
3472
3473 for (i = 0; i < MAX_NR_CONSOLES; i++) {
3474 if (con_driver_map[i] == csw) {
3475 bound = 1;
3476 break;
3477 }
3478 }
3479
3480 return bound;
3481}
3482EXPORT_SYMBOL(con_is_bound);
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496int con_debug_enter(struct vc_data *vc)
3497{
3498 int ret = 0;
3499
3500 saved_fg_console = fg_console;
3501 saved_last_console = last_console;
3502 saved_want_console = want_console;
3503 saved_vc_mode = vc->vc_mode;
3504 saved_console_blanked = console_blanked;
3505 vc->vc_mode = KD_TEXT;
3506 console_blanked = 0;
3507 if (vc->vc_sw->con_debug_enter)
3508 ret = vc->vc_sw->con_debug_enter(vc);
3509#ifdef CONFIG_KGDB_KDB
3510
3511 if (vc->vc_rows < 999) {
3512 int linecount;
3513 char lns[4];
3514 const char *setargs[3] = {
3515 "set",
3516 "LINES",
3517 lns,
3518 };
3519 if (kdbgetintenv(setargs[0], &linecount)) {
3520 snprintf(lns, 4, "%i", vc->vc_rows);
3521 kdb_set(2, setargs);
3522 }
3523 }
3524 if (vc->vc_cols < 999) {
3525 int colcount;
3526 char cols[4];
3527 const char *setargs[3] = {
3528 "set",
3529 "COLUMNS",
3530 cols,
3531 };
3532 if (kdbgetintenv(setargs[0], &colcount)) {
3533 snprintf(cols, 4, "%i", vc->vc_cols);
3534 kdb_set(2, setargs);
3535 }
3536 }
3537#endif
3538 return ret;
3539}
3540EXPORT_SYMBOL_GPL(con_debug_enter);
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553int con_debug_leave(void)
3554{
3555 struct vc_data *vc;
3556 int ret = 0;
3557
3558 fg_console = saved_fg_console;
3559 last_console = saved_last_console;
3560 want_console = saved_want_console;
3561 console_blanked = saved_console_blanked;
3562 vc_cons[fg_console].d->vc_mode = saved_vc_mode;
3563
3564 vc = vc_cons[fg_console].d;
3565 if (vc->vc_sw->con_debug_leave)
3566 ret = vc->vc_sw->con_debug_leave(vc);
3567 return ret;
3568}
3569EXPORT_SYMBOL_GPL(con_debug_leave);
3570
3571static int do_register_con_driver(const struct consw *csw, int first, int last)
3572{
3573 struct module *owner = csw->owner;
3574 struct con_driver *con_driver;
3575 const char *desc;
3576 int i, retval;
3577
3578 WARN_CONSOLE_UNLOCKED();
3579
3580 if (!try_module_get(owner))
3581 return -ENODEV;
3582
3583 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3584 con_driver = ®istered_con_driver[i];
3585
3586
3587 if (con_driver->con == csw) {
3588 retval = -EBUSY;
3589 goto err;
3590 }
3591 }
3592
3593 desc = csw->con_startup();
3594 if (!desc) {
3595 retval = -ENODEV;
3596 goto err;
3597 }
3598
3599 retval = -EINVAL;
3600
3601 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3602 con_driver = ®istered_con_driver[i];
3603
3604 if (con_driver->con == NULL &&
3605 !(con_driver->flag & CON_DRIVER_FLAG_ZOMBIE)) {
3606 con_driver->con = csw;
3607 con_driver->desc = desc;
3608 con_driver->node = i;
3609 con_driver->flag = CON_DRIVER_FLAG_MODULE |
3610 CON_DRIVER_FLAG_INIT;
3611 con_driver->first = first;
3612 con_driver->last = last;
3613 retval = 0;
3614 break;
3615 }
3616 }
3617
3618 if (retval)
3619 goto err;
3620
3621 con_driver->dev =
3622 device_create_with_groups(vtconsole_class, NULL,
3623 MKDEV(0, con_driver->node),
3624 con_driver, con_dev_groups,
3625 "vtcon%i", con_driver->node);
3626 if (IS_ERR(con_driver->dev)) {
3627 printk(KERN_WARNING "Unable to create device for %s; "
3628 "errno = %ld\n", con_driver->desc,
3629 PTR_ERR(con_driver->dev));
3630 con_driver->dev = NULL;
3631 } else {
3632 vtconsole_init_device(con_driver);
3633 }
3634
3635err:
3636 module_put(owner);
3637 return retval;
3638}
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652int do_unregister_con_driver(const struct consw *csw)
3653{
3654 int i;
3655
3656
3657 if (con_is_bound(csw))
3658 return -EBUSY;
3659
3660 if (csw == conswitchp)
3661 return -EINVAL;
3662
3663 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3664 struct con_driver *con_driver = ®istered_con_driver[i];
3665
3666 if (con_driver->con == csw) {
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677 con_driver->con = NULL;
3678 con_driver->flag = CON_DRIVER_FLAG_ZOMBIE;
3679 schedule_work(&con_driver_unregister_work);
3680
3681 return 0;
3682 }
3683 }
3684
3685 return -ENODEV;
3686}
3687EXPORT_SYMBOL_GPL(do_unregister_con_driver);
3688
3689static void con_driver_unregister_callback(struct work_struct *ignored)
3690{
3691 int i;
3692
3693 console_lock();
3694
3695 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3696 struct con_driver *con_driver = ®istered_con_driver[i];
3697
3698 if (!(con_driver->flag & CON_DRIVER_FLAG_ZOMBIE))
3699 continue;
3700
3701 console_unlock();
3702
3703 vtconsole_deinit_device(con_driver);
3704 device_destroy(vtconsole_class, MKDEV(0, con_driver->node));
3705
3706 console_lock();
3707
3708 if (WARN_ON_ONCE(con_driver->con))
3709 con_driver->con = NULL;
3710 con_driver->desc = NULL;
3711 con_driver->dev = NULL;
3712 con_driver->node = 0;
3713 WARN_ON_ONCE(con_driver->flag != CON_DRIVER_FLAG_ZOMBIE);
3714 con_driver->flag = 0;
3715 con_driver->first = 0;
3716 con_driver->last = 0;
3717 }
3718
3719 console_unlock();
3720}
3721
3722
3723
3724
3725
3726
3727
3728
3729int do_take_over_console(const struct consw *csw, int first, int last, int deflt)
3730{
3731 int err;
3732
3733 err = do_register_con_driver(csw, first, last);
3734
3735
3736
3737
3738
3739 if (err == -EBUSY)
3740 err = 0;
3741 if (!err)
3742 do_bind_con_driver(csw, first, last, deflt);
3743
3744 return err;
3745}
3746EXPORT_SYMBOL_GPL(do_take_over_console);
3747
3748
3749
3750
3751
3752
3753void give_up_console(const struct consw *csw)
3754{
3755 console_lock();
3756 do_unregister_con_driver(csw);
3757 console_unlock();
3758}
3759
3760static int __init vtconsole_class_init(void)
3761{
3762 int i;
3763
3764 vtconsole_class = class_create(THIS_MODULE, "vtconsole");
3765 if (IS_ERR(vtconsole_class)) {
3766 printk(KERN_WARNING "Unable to create vt console class; "
3767 "errno = %ld\n", PTR_ERR(vtconsole_class));
3768 vtconsole_class = NULL;
3769 }
3770
3771
3772 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3773 struct con_driver *con = ®istered_con_driver[i];
3774
3775 if (con->con && !con->dev) {
3776 con->dev =
3777 device_create_with_groups(vtconsole_class, NULL,
3778 MKDEV(0, con->node),
3779 con, con_dev_groups,
3780 "vtcon%i", con->node);
3781
3782 if (IS_ERR(con->dev)) {
3783 printk(KERN_WARNING "Unable to create "
3784 "device for %s; errno = %ld\n",
3785 con->desc, PTR_ERR(con->dev));
3786 con->dev = NULL;
3787 } else {
3788 vtconsole_init_device(con);
3789 }
3790 }
3791 }
3792
3793 return 0;
3794}
3795postcore_initcall(vtconsole_class_init);
3796
3797#endif
3798
3799
3800
3801
3802
3803static int set_vesa_blanking(char __user *p)
3804{
3805 unsigned int mode;
3806
3807 if (get_user(mode, p + 1))
3808 return -EFAULT;
3809
3810 vesa_blank_mode = (mode < 4) ? mode : 0;
3811 return 0;
3812}
3813
3814void do_blank_screen(int entering_gfx)
3815{
3816 struct vc_data *vc = vc_cons[fg_console].d;
3817 int i;
3818
3819 WARN_CONSOLE_UNLOCKED();
3820
3821 if (console_blanked) {
3822 if (blank_state == blank_vesa_wait) {
3823 blank_state = blank_off;
3824 vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0);
3825 }
3826 return;
3827 }
3828
3829
3830 if (entering_gfx) {
3831 hide_cursor(vc);
3832 save_screen(vc);
3833 vc->vc_sw->con_blank(vc, -1, 1);
3834 console_blanked = fg_console + 1;
3835 blank_state = blank_off;
3836 set_origin(vc);
3837 return;
3838 }
3839
3840 if (blank_state != blank_normal_wait)
3841 return;
3842 blank_state = blank_off;
3843
3844
3845 if (vc->vc_mode != KD_TEXT) {
3846 console_blanked = fg_console + 1;
3847 return;
3848 }
3849
3850 hide_cursor(vc);
3851 del_timer_sync(&console_timer);
3852 blank_timer_expired = 0;
3853
3854 save_screen(vc);
3855
3856 i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0);
3857 console_blanked = fg_console + 1;
3858 if (i)
3859 set_origin(vc);
3860
3861 if (console_blank_hook && console_blank_hook(1))
3862 return;
3863
3864 if (vesa_off_interval && vesa_blank_mode) {
3865 blank_state = blank_vesa_wait;
3866 mod_timer(&console_timer, jiffies + vesa_off_interval);
3867 }
3868 vt_event_post(VT_EVENT_BLANK, vc->vc_num, vc->vc_num);
3869}
3870EXPORT_SYMBOL(do_blank_screen);
3871
3872
3873
3874
3875void do_unblank_screen(int leaving_gfx)
3876{
3877 struct vc_data *vc;
3878
3879
3880
3881
3882
3883 if (!oops_in_progress)
3884 might_sleep();
3885
3886 WARN_CONSOLE_UNLOCKED();
3887
3888 ignore_poke = 0;
3889 if (!console_blanked)
3890 return;
3891 if (!vc_cons_allocated(fg_console)) {
3892
3893 pr_warn("unblank_screen: tty %d not allocated ??\n",
3894 fg_console + 1);
3895 return;
3896 }
3897 vc = vc_cons[fg_console].d;
3898
3899 if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc))
3900 return;
3901
3902 if (blankinterval) {
3903 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
3904 blank_state = blank_normal_wait;
3905 }
3906
3907 console_blanked = 0;
3908 if (vc->vc_sw->con_blank(vc, 0, leaving_gfx) || vt_force_oops_output(vc))
3909
3910 update_screen(vc);
3911 if (console_blank_hook)
3912 console_blank_hook(0);
3913 set_palette(vc);
3914 set_cursor(vc);
3915 vt_event_post(VT_EVENT_UNBLANK, vc->vc_num, vc->vc_num);
3916}
3917EXPORT_SYMBOL(do_unblank_screen);
3918
3919
3920
3921
3922
3923
3924
3925void unblank_screen(void)
3926{
3927 do_unblank_screen(0);
3928}
3929
3930
3931
3932
3933
3934
3935static void blank_screen_t(unsigned long dummy)
3936{
3937 if (unlikely(!keventd_up())) {
3938 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
3939 return;
3940 }
3941 blank_timer_expired = 1;
3942 schedule_work(&console_work);
3943}
3944
3945void poke_blanked_console(void)
3946{
3947 WARN_CONSOLE_UNLOCKED();
3948
3949
3950
3951
3952
3953
3954
3955 might_sleep();
3956
3957
3958
3959
3960 del_timer(&console_timer);
3961 blank_timer_expired = 0;
3962
3963 if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS)
3964 return;
3965 if (console_blanked)
3966 unblank_screen();
3967 else if (blankinterval) {
3968 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
3969 blank_state = blank_normal_wait;
3970 }
3971}
3972
3973
3974
3975
3976
3977static void set_palette(struct vc_data *vc)
3978{
3979 WARN_CONSOLE_UNLOCKED();
3980
3981 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_set_palette)
3982 vc->vc_sw->con_set_palette(vc, color_table);
3983}
3984
3985
3986
3987
3988
3989
3990int con_set_cmap(unsigned char __user *arg)
3991{
3992 int i, j, k;
3993 unsigned char colormap[3*16];
3994
3995 if (copy_from_user(colormap, arg, sizeof(colormap)))
3996 return -EFAULT;
3997
3998 console_lock();
3999 for (i = k = 0; i < 16; i++) {
4000 default_red[i] = colormap[k++];
4001 default_grn[i] = colormap[k++];
4002 default_blu[i] = colormap[k++];
4003 }
4004 for (i = 0; i < MAX_NR_CONSOLES; i++) {
4005 if (!vc_cons_allocated(i))
4006 continue;
4007 for (j = k = 0; j < 16; j++) {
4008 vc_cons[i].d->vc_palette[k++] = default_red[j];
4009 vc_cons[i].d->vc_palette[k++] = default_grn[j];
4010 vc_cons[i].d->vc_palette[k++] = default_blu[j];
4011 }
4012 set_palette(vc_cons[i].d);
4013 }
4014 console_unlock();
4015
4016 return 0;
4017}
4018
4019int con_get_cmap(unsigned char __user *arg)
4020{
4021 int i, k;
4022 unsigned char colormap[3*16];
4023
4024 console_lock();
4025 for (i = k = 0; i < 16; i++) {
4026 colormap[k++] = default_red[i];
4027 colormap[k++] = default_grn[i];
4028 colormap[k++] = default_blu[i];
4029 }
4030 console_unlock();
4031
4032 if (copy_to_user(arg, colormap, sizeof(colormap)))
4033 return -EFAULT;
4034
4035 return 0;
4036}
4037
4038void reset_palette(struct vc_data *vc)
4039{
4040 int j, k;
4041 for (j=k=0; j<16; j++) {
4042 vc->vc_palette[k++] = default_red[j];
4043 vc->vc_palette[k++] = default_grn[j];
4044 vc->vc_palette[k++] = default_blu[j];
4045 }
4046 set_palette(vc);
4047}
4048
4049
4050
4051
4052
4053
4054
4055
4056
4057
4058
4059
4060
4061
4062#define max_font_size 65536
4063
4064static int con_font_get(struct vc_data *vc, struct console_font_op *op)
4065{
4066 struct console_font font;
4067 int rc = -EINVAL;
4068 int c;
4069
4070 if (op->data) {
4071 font.data = kmalloc(max_font_size, GFP_KERNEL);
4072 if (!font.data)
4073 return -ENOMEM;
4074 } else
4075 font.data = NULL;
4076
4077 console_lock();
4078 if (vc->vc_mode != KD_TEXT)
4079 rc = -EINVAL;
4080 else if (vc->vc_sw->con_font_get)
4081 rc = vc->vc_sw->con_font_get(vc, &font);
4082 else
4083 rc = -ENOSYS;
4084 console_unlock();
4085
4086 if (rc)
4087 goto out;
4088
4089 c = (font.width+7)/8 * 32 * font.charcount;
4090
4091 if (op->data && font.charcount > op->charcount)
4092 rc = -ENOSPC;
4093 if (!(op->flags & KD_FONT_FLAG_OLD)) {
4094 if (font.width > op->width || font.height > op->height)
4095 rc = -ENOSPC;
4096 } else {
4097 if (font.width != 8)
4098 rc = -EIO;
4099 else if ((op->height && font.height > op->height) ||
4100 font.height > 32)
4101 rc = -ENOSPC;
4102 }
4103 if (rc)
4104 goto out;
4105
4106 op->height = font.height;
4107 op->width = font.width;
4108 op->charcount = font.charcount;
4109
4110 if (op->data && copy_to_user(op->data, font.data, c))
4111 rc = -EFAULT;
4112
4113out:
4114 kfree(font.data);
4115 return rc;
4116}
4117
4118static int con_font_set(struct vc_data *vc, struct console_font_op *op)
4119{
4120 struct console_font font;
4121 int rc = -EINVAL;
4122 int size;
4123
4124 if (vc->vc_mode != KD_TEXT)
4125 return -EINVAL;
4126 if (!op->data)
4127 return -EINVAL;
4128 if (op->charcount > 512)
4129 return -EINVAL;
4130 if (!op->height) {
4131 int h, i;
4132 u8 __user *charmap = op->data;
4133 u8 tmp;
4134
4135
4136
4137 if (!(op->flags & KD_FONT_FLAG_OLD))
4138 return -EINVAL;
4139 for (h = 32; h > 0; h--)
4140 for (i = 0; i < op->charcount; i++) {
4141 if (get_user(tmp, &charmap[32*i+h-1]))
4142 return -EFAULT;
4143 if (tmp)
4144 goto nonzero;
4145 }
4146 return -EINVAL;
4147 nonzero:
4148 op->height = h;
4149 }
4150 if (op->width <= 0 || op->width > 32 || op->height > 32)
4151 return -EINVAL;
4152 size = (op->width+7)/8 * 32 * op->charcount;
4153 if (size > max_font_size)
4154 return -ENOSPC;
4155 font.charcount = op->charcount;
4156 font.height = op->height;
4157 font.width = op->width;
4158 font.data = memdup_user(op->data, size);
4159 if (IS_ERR(font.data))
4160 return PTR_ERR(font.data);
4161 console_lock();
4162 if (vc->vc_mode != KD_TEXT)
4163 rc = -EINVAL;
4164 else if (vc->vc_sw->con_font_set)
4165 rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
4166 else
4167 rc = -ENOSYS;
4168 console_unlock();
4169 kfree(font.data);
4170 return rc;
4171}
4172
4173static int con_font_default(struct vc_data *vc, struct console_font_op *op)
4174{
4175 struct console_font font = {.width = op->width, .height = op->height};
4176 char name[MAX_FONT_NAME];
4177 char *s = name;
4178 int rc;
4179
4180
4181 if (!op->data)
4182 s = NULL;
4183 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0)
4184 return -EFAULT;
4185 else
4186 name[MAX_FONT_NAME - 1] = 0;
4187
4188 console_lock();
4189 if (vc->vc_mode != KD_TEXT) {
4190 console_unlock();
4191 return -EINVAL;
4192 }
4193 if (vc->vc_sw->con_font_default)
4194 rc = vc->vc_sw->con_font_default(vc, &font, s);
4195 else
4196 rc = -ENOSYS;
4197 console_unlock();
4198 if (!rc) {
4199 op->width = font.width;
4200 op->height = font.height;
4201 }
4202 return rc;
4203}
4204
4205static int con_font_copy(struct vc_data *vc, struct console_font_op *op)
4206{
4207 int con = op->height;
4208 int rc;
4209
4210
4211 console_lock();
4212 if (vc->vc_mode != KD_TEXT)
4213 rc = -EINVAL;
4214 else if (!vc->vc_sw->con_font_copy)
4215 rc = -ENOSYS;
4216 else if (con < 0 || !vc_cons_allocated(con))
4217 rc = -ENOTTY;
4218 else if (con == vc->vc_num)
4219 rc = 0;
4220 else
4221 rc = vc->vc_sw->con_font_copy(vc, con);
4222 console_unlock();
4223 return rc;
4224}
4225
4226int con_font_op(struct vc_data *vc, struct console_font_op *op)
4227{
4228 switch (op->op) {
4229 case KD_FONT_OP_SET:
4230 return con_font_set(vc, op);
4231 case KD_FONT_OP_GET:
4232 return con_font_get(vc, op);
4233 case KD_FONT_OP_SET_DEFAULT:
4234 return con_font_default(vc, op);
4235 case KD_FONT_OP_COPY:
4236 return con_font_copy(vc, op);
4237 }
4238 return -ENOSYS;
4239}
4240
4241
4242
4243
4244
4245
4246u16 screen_glyph(struct vc_data *vc, int offset)
4247{
4248 u16 w = scr_readw(screenpos(vc, offset, 1));
4249 u16 c = w & 0xff;
4250
4251 if (w & vc->vc_hi_font_mask)
4252 c |= 0x100;
4253 return c;
4254}
4255EXPORT_SYMBOL_GPL(screen_glyph);
4256
4257
4258unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed)
4259{
4260 return screenpos(vc, 2 * w_offset, viewed);
4261}
4262EXPORT_SYMBOL_GPL(screen_pos);
4263
4264void getconsxy(struct vc_data *vc, unsigned char *p)
4265{
4266 p[0] = vc->vc_x;
4267 p[1] = vc->vc_y;
4268}
4269
4270void putconsxy(struct vc_data *vc, unsigned char *p)
4271{
4272 hide_cursor(vc);
4273 gotoxy(vc, p[0], p[1]);
4274 set_cursor(vc);
4275}
4276
4277u16 vcs_scr_readw(struct vc_data *vc, const u16 *org)
4278{
4279 if ((unsigned long)org == vc->vc_pos && softcursor_original != -1)
4280 return softcursor_original;
4281 return scr_readw(org);
4282}
4283
4284void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org)
4285{
4286 scr_writew(val, org);
4287 if ((unsigned long)org == vc->vc_pos) {
4288 softcursor_original = -1;
4289 add_softcursor(vc);
4290 }
4291}
4292
4293void vcs_scr_updated(struct vc_data *vc)
4294{
4295 notify_update(vc);
4296}
4297
4298
4299
4300
4301
4302EXPORT_SYMBOL(color_table);
4303EXPORT_SYMBOL(default_red);
4304EXPORT_SYMBOL(default_grn);
4305EXPORT_SYMBOL(default_blu);
4306EXPORT_SYMBOL(update_region);
4307EXPORT_SYMBOL(redraw_screen);
4308EXPORT_SYMBOL(vc_resize);
4309EXPORT_SYMBOL(fg_console);
4310EXPORT_SYMBOL(console_blank_hook);
4311EXPORT_SYMBOL(console_blanked);
4312EXPORT_SYMBOL(vc_cons);
4313EXPORT_SYMBOL(global_cursor_default);
4314#ifndef VT_SINGLE_DRIVER
4315EXPORT_SYMBOL(give_up_console);
4316#endif
4317