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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * linux/drivers/char/vt.c
3 *
4 * Copyright (C) 1991, 1992 Linus Torvalds
5 */
6
7/*
8 * Hopefully this will be a rather complete VT102 implementation.
9 *
10 * Beeping thanks to John T Kohl.
11 *
12 * Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics
13 * Chars, and VT100 enhancements by Peter MacDonald.
14 *
15 * Copy and paste function by Andrew Haylett,
16 * some enhancements by Alessandro Rubini.
17 *
18 * Code to check for different video-cards mostly by Galen Hunt,
19 * <g-hunt@ee.utah.edu>
20 *
21 * Rudimentary ISO 10646/Unicode/UTF-8 character set support by
22 * Markus Kuhn, <mskuhn@immd4.informatik.uni-erlangen.de>.
23 *
24 * Dynamic allocation of consoles, aeb@cwi.nl, May 1994
25 * Resizing of consoles, aeb, 940926
26 *
27 * Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94
28 * <poe@daimi.aau.dk>
29 *
30 * User-defined bell sound, new setterm control sequences and printk
31 * redirection by Martin Mares <mj@k332.feld.cvut.cz> 19-Nov-95
32 *
33 * APM screenblank bug fixed Takashi Manabe <manabe@roy.dsl.tutics.tut.jp>
34 *
35 * Merge with the abstract console driver by Geert Uytterhoeven
36 * <geert@linux-m68k.org>, Jan 1997.
37 *
38 * Original m68k console driver modifications by
39 *
40 * - Arno Griffioen <arno@usn.nl>
41 * - David Carter <carter@cs.bris.ac.uk>
42 *
43 * The abstract console driver provides a generic interface for a text
44 * console. It supports VGA text mode, frame buffer based graphical consoles
45 * and special graphics processors that are only accessible through some
46 * registers (e.g. a TMS340x0 GSP).
47 *
48 * The interface to the hardware is specified using a special structure
49 * (struct consw) which contains function pointers to console operations
50 * (see <linux/console.h> for more information).
51 *
52 * Support for changeable cursor shape
53 * by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997
54 *
55 * Ported to i386 and con_scrolldelta fixed
56 * by Emmanuel Marty <core@ggi-project.org>, April 1998
57 *
58 * Resurrected character buffers in videoram plus lots of other trickery
59 * by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998
60 *
61 * Removed old-style timers, introduced console_timer, made timer
Francois Camie1f8e872008-10-15 22:01:59 -070062 * deletion SMP-safe. 17Jun00, Andrew Morton
Linus Torvalds1da177e2005-04-16 15:20:36 -070063 *
64 * Removed console_lock, enabled interrupts across all console operations
65 * 13 March 2001, Andrew Morton
Adam Tlalkad4328b42006-09-29 01:59:53 -070066 *
67 * Fixed UTF-8 mode so alternate charset modes always work according
68 * to control sequences interpreted in do_con_trol function
69 * preserving backward VT100 semigraphics compatibility,
70 * malformed UTF sequences represented as sequences of replacement glyphs,
71 * original codes or '?' as a last resort if replacement glyph is undefined
72 * by Adam Tla/lka <atlka@pg.gda.pl>, Aug 2006
Linus Torvalds1da177e2005-04-16 15:20:36 -070073 */
74
75#include <linux/module.h>
76#include <linux/types.h>
77#include <linux/sched.h>
78#include <linux/tty.h>
79#include <linux/tty_flip.h>
80#include <linux/kernel.h>
81#include <linux/string.h>
82#include <linux/errno.h>
83#include <linux/kd.h>
84#include <linux/slab.h>
85#include <linux/major.h>
86#include <linux/mm.h>
87#include <linux/console.h>
88#include <linux/init.h>
Matthias Kaehlckec831c332007-05-08 00:39:49 -070089#include <linux/mutex.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070090#include <linux/vt_kern.h>
91#include <linux/selection.h>
Alexey Dobriyan405f5572009-07-11 22:08:37 +040092#include <linux/smp_lock.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070093#include <linux/tiocl.h>
94#include <linux/kbd_kern.h>
95#include <linux/consolemap.h>
96#include <linux/timer.h>
97#include <linux/interrupt.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070098#include <linux/workqueue.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070099#include <linux/pm.h>
100#include <linux/font.h>
101#include <linux/bitops.h>
Samuel Thibaultb293d752007-10-18 23:39:17 -0700102#include <linux/notifier.h>
Alan Coxd81ed102008-10-13 10:41:42 +0100103#include <linux/device.h>
104#include <linux/io.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105#include <asm/system.h>
Alan Coxd81ed102008-10-13 10:41:42 +0100106#include <linux/uaccess.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107
Antonino A. Daplas3e795de2006-06-26 00:27:08 -0700108#define MAX_NR_CON_DRIVER 16
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109
Antonino A. Daplas6db40632006-06-26 00:27:12 -0700110#define CON_DRIVER_FLAG_MODULE 1
Antonino A. Daplas928e9642006-10-03 01:14:49 -0700111#define CON_DRIVER_FLAG_INIT 2
112#define CON_DRIVER_FLAG_ATTR 4
Antonino A. Daplas3e795de2006-06-26 00:27:08 -0700113
114struct con_driver {
115 const struct consw *con;
116 const char *desc;
Greg Kroah-Hartman805952a2006-08-07 22:19:37 -0700117 struct device *dev;
Antonino A. Daplas6db40632006-06-26 00:27:12 -0700118 int node;
Antonino A. Daplas3e795de2006-06-26 00:27:08 -0700119 int first;
120 int last;
121 int flag;
122};
123
124static struct con_driver registered_con_driver[MAX_NR_CON_DRIVER];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125const struct consw *conswitchp;
126
127/* A bitmap for codes <32. A bit of 1 indicates that the code
128 * corresponding to that bit number invokes some special action
129 * (such as cursor movement) and should not be displayed as a
130 * glyph unless the disp_ctrl mode is explicitly enabled.
131 */
132#define CTRL_ACTION 0x0d00ff81
133#define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */
134
135/*
136 * Here is the default bell parameters: 750HZ, 1/8th of a second
137 */
138#define DEFAULT_BELL_PITCH 750
139#define DEFAULT_BELL_DURATION (HZ/8)
140
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141struct 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);
Yoichi Yuasa403aac92006-12-06 20:38:38 -0800154static int set_vesa_blanking(char __user *p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155static void set_cursor(struct vc_data *vc);
156static void hide_cursor(struct vc_data *vc);
David Howells65f27f32006-11-22 14:55:48 +0000157static void console_callback(struct work_struct *ignored);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158static void blank_screen_t(unsigned long dummy);
159static void set_palette(struct vc_data *vc);
160
161static int printable; /* Is console ready for printing? */
Jan Engelhardt77bf2ba2007-10-18 03:04:34 -0700162int default_utf8 = true;
Antonino A. Daplas042f10e2007-05-08 00:38:09 -0700163module_param(default_utf8, int, S_IRUGO | S_IWUSR);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164
165/*
166 * ignore_poke: don't unblank the screen when things are typed. This is
167 * mainly for the privacy of braille terminal users.
168 */
169static int ignore_poke;
170
171int do_poke_blanked_console;
172int console_blanked;
173
174static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175static int vesa_off_interval;
Daniel Mackf324edc2009-06-16 15:33:52 -0700176static int blankinterval = 10*60;
177core_param(consoleblank, blankinterval, int, 0444);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178
David Howells65f27f32006-11-22 14:55:48 +0000179static DECLARE_WORK(console_work, console_callback);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180
181/*
182 * fg_console is the current virtual console,
183 * last_console is the last used one,
184 * want_console is the console we want to switch to,
185 * kmsg_redirect is the console for kernel messages,
186 */
187int fg_console;
188int last_console;
189int want_console = -1;
190int kmsg_redirect;
191
192/*
193 * For each existing display, we have a pointer to console currently visible
194 * on that display, allowing consoles other than fg_console to be refreshed
195 * appropriately. Unless the low-level driver supplies its own display_fg
196 * variable, we use this one for the "master display".
197 */
198static struct vc_data *master_display_fg;
199
200/*
201 * Unfortunately, we need to delay tty echo when we're currently writing to the
202 * console since the code is (and always was) not re-entrant, so we schedule
203 * all flip requests to process context with schedule-task() and run it from
204 * console_callback().
205 */
206
207/*
208 * For the same reason, we defer scrollback to the console callback.
209 */
210static int scrollback_delta;
211
212/*
213 * Hook so that the power management routines can (un)blank
214 * the console on our behalf.
215 */
216int (*console_blank_hook)(int);
217
Jiri Slaby40565f12007-02-12 00:52:31 -0800218static DEFINE_TIMER(console_timer, blank_screen_t, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219static int blank_state;
220static int blank_timer_expired;
221enum {
222 blank_off = 0,
223 blank_normal_wait,
224 blank_vesa_wait,
225};
226
227/*
Samuel Thibaultb293d752007-10-18 23:39:17 -0700228 * Notifier list for console events.
229 */
230static ATOMIC_NOTIFIER_HEAD(vt_notifier_list);
231
232int register_vt_notifier(struct notifier_block *nb)
233{
234 return atomic_notifier_chain_register(&vt_notifier_list, nb);
235}
236EXPORT_SYMBOL_GPL(register_vt_notifier);
237
238int unregister_vt_notifier(struct notifier_block *nb)
239{
240 return atomic_notifier_chain_unregister(&vt_notifier_list, nb);
241}
242EXPORT_SYMBOL_GPL(unregister_vt_notifier);
243
244static void notify_write(struct vc_data *vc, unsigned int unicode)
245{
246 struct vt_notifier_param param = { .vc = vc, unicode = unicode };
247 atomic_notifier_call_chain(&vt_notifier_list, VT_WRITE, &param);
248}
249
250static void notify_update(struct vc_data *vc)
251{
252 struct vt_notifier_param param = { .vc = vc };
253 atomic_notifier_call_chain(&vt_notifier_list, VT_UPDATE, &param);
254}
255
256/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257 * Low-Level Functions
258 */
259
260#define IS_FG(vc) ((vc)->vc_num == fg_console)
261
262#ifdef VT_BUF_VRAM_ONLY
263#define DO_UPDATE(vc) 0
264#else
Stefano Stabellinif700d6e2008-07-23 21:29:59 -0700265#define DO_UPDATE(vc) (CON_IS_VISIBLE(vc) && !console_blanked)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266#endif
267
268static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed)
269{
270 unsigned short *p;
271
272 if (!viewed)
273 p = (unsigned short *)(vc->vc_origin + offset);
274 else if (!vc->vc_sw->con_screen_pos)
275 p = (unsigned short *)(vc->vc_visible_origin + offset);
276 else
277 p = vc->vc_sw->con_screen_pos(vc, offset);
278 return p;
279}
280
281static inline void scrolldelta(int lines)
282{
283 scrollback_delta += lines;
284 schedule_console_callback();
285}
286
287void schedule_console_callback(void)
288{
289 schedule_work(&console_work);
290}
291
292static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
293{
294 unsigned short *d, *s;
295
296 if (t+nr >= b)
297 nr = b - t - 1;
298 if (b > vc->vc_rows || t >= b || nr < 1)
299 return;
300 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr))
301 return;
302 d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
303 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr));
304 scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row);
Linus Torvalds93f78da2008-10-14 12:12:02 -0700305 scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_video_erase_char,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 vc->vc_size_row * nr);
307}
308
309static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
310{
311 unsigned short *s;
312 unsigned int step;
313
314 if (t+nr >= b)
315 nr = b - t - 1;
316 if (b > vc->vc_rows || t >= b || nr < 1)
317 return;
318 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr))
319 return;
320 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
321 step = vc->vc_cols * nr;
322 scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row);
Linus Torvalds93f78da2008-10-14 12:12:02 -0700323 scr_memsetw(s, vc->vc_video_erase_char, 2 * step);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324}
325
326static void do_update_region(struct vc_data *vc, unsigned long start, int count)
327{
328#ifndef VT_BUF_VRAM_ONLY
329 unsigned int xx, yy, offset;
330 u16 *p;
331
332 p = (u16 *) start;
333 if (!vc->vc_sw->con_getxy) {
334 offset = (start - vc->vc_origin) / 2;
335 xx = offset % vc->vc_cols;
336 yy = offset / vc->vc_cols;
337 } else {
338 int nxx, nyy;
339 start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy);
340 xx = nxx; yy = nyy;
341 }
342 for(;;) {
343 u16 attrib = scr_readw(p) & 0xff00;
344 int startx = xx;
345 u16 *q = p;
346 while (xx < vc->vc_cols && count) {
347 if (attrib != (scr_readw(p) & 0xff00)) {
348 if (p > q)
349 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
350 startx = xx;
351 q = p;
352 attrib = scr_readw(p) & 0xff00;
353 }
354 p++;
355 xx++;
356 count--;
357 }
358 if (p > q)
359 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
360 if (!count)
361 break;
362 xx = 0;
363 yy++;
364 if (vc->vc_sw->con_getxy) {
365 p = (u16 *)start;
366 start = vc->vc_sw->con_getxy(vc, start, NULL, NULL);
367 }
368 }
369#endif
370}
371
372void update_region(struct vc_data *vc, unsigned long start, int count)
373{
374 WARN_CONSOLE_UNLOCKED();
375
376 if (DO_UPDATE(vc)) {
377 hide_cursor(vc);
378 do_update_region(vc, start, count);
379 set_cursor(vc);
380 }
381}
382
383/* Structure of attributes is hardware-dependent */
384
Jan Engelhardtfa6ce9a2007-05-08 00:38:04 -0700385static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink,
386 u8 _underline, u8 _reverse, u8 _italic)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387{
388 if (vc->vc_sw->con_build_attr)
Jan Engelhardtfa6ce9a2007-05-08 00:38:04 -0700389 return vc->vc_sw->con_build_attr(vc, _color, _intensity,
390 _blink, _underline, _reverse, _italic);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391
392#ifndef VT_BUF_VRAM_ONLY
393/*
394 * ++roman: I completely changed the attribute format for monochrome
395 * mode (!can_do_color). The formerly used MDA (monochrome display
396 * adapter) format didn't allow the combination of certain effects.
397 * Now the attribute is just a bit vector:
398 * Bit 0..1: intensity (0..2)
399 * Bit 2 : underline
400 * Bit 3 : reverse
401 * Bit 7 : blink
402 */
403 {
Jan Engelhardtc9e587ab2008-04-29 00:59:46 -0700404 u8 a = _color;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405 if (!vc->vc_can_do_color)
406 return _intensity |
Jan Engelhardtfa6ce9a2007-05-08 00:38:04 -0700407 (_italic ? 2 : 0) |
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408 (_underline ? 4 : 0) |
409 (_reverse ? 8 : 0) |
410 (_blink ? 0x80 : 0);
Jan Engelhardtfa6ce9a2007-05-08 00:38:04 -0700411 if (_italic)
412 a = (a & 0xF0) | vc->vc_itcolor;
413 else if (_underline)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414 a = (a & 0xf0) | vc->vc_ulcolor;
415 else if (_intensity == 0)
416 a = (a & 0xf0) | vc->vc_ulcolor;
417 if (_reverse)
418 a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77);
419 if (_blink)
420 a ^= 0x80;
421 if (_intensity == 2)
422 a ^= 0x08;
423 if (vc->vc_hi_font_mask == 0x100)
424 a <<= 1;
425 return a;
426 }
427#else
428 return 0;
429#endif
430}
431
432static void update_attr(struct vc_data *vc)
433{
Jan Engelhardtfa6ce9a2007-05-08 00:38:04 -0700434 vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity,
435 vc->vc_blink, vc->vc_underline,
436 vc->vc_reverse ^ vc->vc_decscnm, vc->vc_italic);
437 vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm, 0) << 8) | ' ';
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438}
439
440/* Note: inverting the screen twice should revert to the original state */
441void invert_screen(struct vc_data *vc, int offset, int count, int viewed)
442{
443 unsigned short *p;
444
445 WARN_CONSOLE_UNLOCKED();
446
447 count /= 2;
448 p = screenpos(vc, offset, viewed);
449 if (vc->vc_sw->con_invert_region)
450 vc->vc_sw->con_invert_region(vc, p, count);
451#ifndef VT_BUF_VRAM_ONLY
452 else {
453 u16 *q = p;
454 int cnt = count;
455 u16 a;
456
457 if (!vc->vc_can_do_color) {
458 while (cnt--) {
459 a = scr_readw(q);
460 a ^= 0x0800;
461 scr_writew(a, q);
462 q++;
463 }
464 } else if (vc->vc_hi_font_mask == 0x100) {
465 while (cnt--) {
466 a = scr_readw(q);
467 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4);
468 scr_writew(a, q);
469 q++;
470 }
471 } else {
472 while (cnt--) {
473 a = scr_readw(q);
474 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4);
475 scr_writew(a, q);
476 q++;
477 }
478 }
479 }
480#endif
481 if (DO_UPDATE(vc))
482 do_update_region(vc, (unsigned long) p, count);
483}
484
485/* used by selection: complement pointer position */
486void complement_pos(struct vc_data *vc, int offset)
487{
Antonino A. Daplas414edcd2005-09-06 15:17:52 -0700488 static int old_offset = -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489 static unsigned short old;
490 static unsigned short oldx, oldy;
491
492 WARN_CONSOLE_UNLOCKED();
493
Antonino A. Daplas414edcd2005-09-06 15:17:52 -0700494 if (old_offset != -1 && old_offset >= 0 &&
495 old_offset < vc->vc_screenbuf_size) {
496 scr_writew(old, screenpos(vc, old_offset, 1));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497 if (DO_UPDATE(vc))
498 vc->vc_sw->con_putc(vc, old, oldy, oldx);
499 }
Antonino A. Daplas414edcd2005-09-06 15:17:52 -0700500
501 old_offset = offset;
502
503 if (offset != -1 && offset >= 0 &&
504 offset < vc->vc_screenbuf_size) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505 unsigned short new;
Antonino A. Daplas414edcd2005-09-06 15:17:52 -0700506 unsigned short *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507 p = screenpos(vc, offset, 1);
508 old = scr_readw(p);
509 new = old ^ vc->vc_complement_mask;
510 scr_writew(new, p);
511 if (DO_UPDATE(vc)) {
512 oldx = (offset >> 1) % vc->vc_cols;
513 oldy = (offset >> 1) / vc->vc_cols;
514 vc->vc_sw->con_putc(vc, new, oldy, oldx);
515 }
516 }
Antonino A. Daplas414edcd2005-09-06 15:17:52 -0700517
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518}
519
520static void insert_char(struct vc_data *vc, unsigned int nr)
521{
522 unsigned short *p, *q = (unsigned short *)vc->vc_pos;
523
524 p = q + vc->vc_cols - nr - vc->vc_x;
525 while (--p >= q)
526 scr_writew(scr_readw(p), p + nr);
527 scr_memsetw(q, vc->vc_video_erase_char, nr * 2);
528 vc->vc_need_wrap = 0;
529 if (DO_UPDATE(vc)) {
530 unsigned short oldattr = vc->vc_attr;
531 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x, vc->vc_y, vc->vc_x + nr, 1,
532 vc->vc_cols - vc->vc_x - nr);
533 vc->vc_attr = vc->vc_video_erase_char >> 8;
534 while (nr--)
535 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y, vc->vc_x + nr);
536 vc->vc_attr = oldattr;
537 }
538}
539
540static void delete_char(struct vc_data *vc, unsigned int nr)
541{
542 unsigned int i = vc->vc_x;
543 unsigned short *p = (unsigned short *)vc->vc_pos;
544
545 while (++i <= vc->vc_cols - nr) {
546 scr_writew(scr_readw(p+nr), p);
547 p++;
548 }
549 scr_memsetw(p, vc->vc_video_erase_char, nr * 2);
550 vc->vc_need_wrap = 0;
551 if (DO_UPDATE(vc)) {
552 unsigned short oldattr = vc->vc_attr;
553 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x + nr, vc->vc_y, vc->vc_x, 1,
554 vc->vc_cols - vc->vc_x - nr);
555 vc->vc_attr = vc->vc_video_erase_char >> 8;
556 while (nr--)
557 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y,
558 vc->vc_cols - 1 - nr);
559 vc->vc_attr = oldattr;
560 }
561}
562
563static int softcursor_original;
564
565static void add_softcursor(struct vc_data *vc)
566{
567 int i = scr_readw((u16 *) vc->vc_pos);
568 u32 type = vc->vc_cursor_type;
569
570 if (! (type & 0x10)) return;
571 if (softcursor_original != -1) return;
572 softcursor_original = i;
573 i |= ((type >> 8) & 0xff00 );
574 i ^= ((type) & 0xff00 );
575 if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000;
576 if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700;
577 scr_writew(i, (u16 *) vc->vc_pos);
578 if (DO_UPDATE(vc))
579 vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x);
580}
581
582static void hide_softcursor(struct vc_data *vc)
583{
584 if (softcursor_original != -1) {
585 scr_writew(softcursor_original, (u16 *)vc->vc_pos);
586 if (DO_UPDATE(vc))
587 vc->vc_sw->con_putc(vc, softcursor_original,
588 vc->vc_y, vc->vc_x);
589 softcursor_original = -1;
590 }
591}
592
593static void hide_cursor(struct vc_data *vc)
594{
595 if (vc == sel_cons)
596 clear_selection();
597 vc->vc_sw->con_cursor(vc, CM_ERASE);
598 hide_softcursor(vc);
599}
600
601static void set_cursor(struct vc_data *vc)
602{
603 if (!IS_FG(vc) || console_blanked ||
604 vc->vc_mode == KD_GRAPHICS)
605 return;
606 if (vc->vc_deccm) {
607 if (vc == sel_cons)
608 clear_selection();
609 add_softcursor(vc);
610 if ((vc->vc_cursor_type & 0x0f) != 1)
611 vc->vc_sw->con_cursor(vc, CM_DRAW);
612 } else
613 hide_cursor(vc);
614}
615
616static void set_origin(struct vc_data *vc)
617{
618 WARN_CONSOLE_UNLOCKED();
619
620 if (!CON_IS_VISIBLE(vc) ||
621 !vc->vc_sw->con_set_origin ||
622 !vc->vc_sw->con_set_origin(vc))
623 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
624 vc->vc_visible_origin = vc->vc_origin;
625 vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size;
626 vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x;
627}
628
629static inline void save_screen(struct vc_data *vc)
630{
631 WARN_CONSOLE_UNLOCKED();
632
633 if (vc->vc_sw->con_save_screen)
634 vc->vc_sw->con_save_screen(vc);
635}
636
637/*
638 * Redrawing of screen
639 */
640
641static void clear_buffer_attributes(struct vc_data *vc)
642{
643 unsigned short *p = (unsigned short *)vc->vc_origin;
644 int count = vc->vc_screenbuf_size / 2;
645 int mask = vc->vc_hi_font_mask | 0xff;
646
647 for (; count > 0; count--, p++) {
648 scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p);
649 }
650}
651
652void redraw_screen(struct vc_data *vc, int is_switch)
653{
654 int redraw = 0;
655
656 WARN_CONSOLE_UNLOCKED();
657
658 if (!vc) {
659 /* strange ... */
660 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
661 return;
662 }
663
664 if (is_switch) {
665 struct vc_data *old_vc = vc_cons[fg_console].d;
666 if (old_vc == vc)
667 return;
668 if (!CON_IS_VISIBLE(vc))
669 redraw = 1;
670 *vc->vc_display_fg = vc;
671 fg_console = vc->vc_num;
672 hide_cursor(old_vc);
673 if (!CON_IS_VISIBLE(old_vc)) {
674 save_screen(old_vc);
675 set_origin(old_vc);
676 }
677 } else {
678 hide_cursor(vc);
679 redraw = 1;
680 }
681
682 if (redraw) {
683 int update;
684 int old_was_color = vc->vc_can_do_color;
685
686 set_origin(vc);
687 update = vc->vc_sw->con_switch(vc);
688 set_palette(vc);
689 /*
690 * If console changed from mono<->color, the best we can do
691 * is to clear the buffer attributes. As it currently stands,
692 * rebuilding new attributes from the old buffer is not doable
693 * without overly complex code.
694 */
695 if (old_was_color != vc->vc_can_do_color) {
696 update_attr(vc);
697 clear_buffer_attributes(vc);
698 }
699 if (update && vc->vc_mode != KD_GRAPHICS)
700 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
701 }
702 set_cursor(vc);
703 if (is_switch) {
704 set_leds();
705 compute_shiftstate();
Samuel Thibault8182ec42008-03-04 14:28:36 -0800706 notify_update(vc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707 }
708}
709
710/*
711 * Allocation, freeing and resizing of VTs.
712 */
713
714int vc_cons_allocated(unsigned int i)
715{
716 return (i < MAX_NR_CONSOLES && vc_cons[i].d);
717}
718
719static void visual_init(struct vc_data *vc, int num, int init)
720{
721 /* ++Geert: vc->vc_sw->con_init determines console size */
722 if (vc->vc_sw)
723 module_put(vc->vc_sw->owner);
724 vc->vc_sw = conswitchp;
725#ifndef VT_SINGLE_DRIVER
726 if (con_driver_map[num])
727 vc->vc_sw = con_driver_map[num];
728#endif
729 __module_get(vc->vc_sw->owner);
730 vc->vc_num = num;
731 vc->vc_display_fg = &master_display_fg;
732 vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir;
733 vc->vc_uni_pagedir = 0;
734 vc->vc_hi_font_mask = 0;
735 vc->vc_complement_mask = 0;
736 vc->vc_can_do_color = 0;
737 vc->vc_sw->con_init(vc, init);
738 if (!vc->vc_complement_mask)
739 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
740 vc->vc_s_complement_mask = vc->vc_complement_mask;
741 vc->vc_size_row = vc->vc_cols << 1;
742 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
743}
744
745int vc_allocate(unsigned int currcons) /* return 0 on success */
746{
747 WARN_CONSOLE_UNLOCKED();
748
749 if (currcons >= MAX_NR_CONSOLES)
750 return -ENXIO;
751 if (!vc_cons[currcons].d) {
752 struct vc_data *vc;
Samuel Thibaultb293d752007-10-18 23:39:17 -0700753 struct vt_notifier_param param;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754
755 /* prevent users from taking too much memory */
756 if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE))
757 return -EPERM;
758
759 /* due to the granularity of kmalloc, we waste some memory here */
760 /* the alloc is done in two steps, to optimize the common situation
761 of a 25x80 console (structsize=216, screenbuf_size=4000) */
762 /* although the numbers above are not valid since long ago, the
763 point is still up-to-date and the comment still has its value
764 even if only as a historical artifact. --mj, July 1998 */
Samuel Thibaultb293d752007-10-18 23:39:17 -0700765 param.vc = vc = kzalloc(sizeof(struct vc_data), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766 if (!vc)
767 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700768 vc_cons[currcons].d = vc;
Bernhard Wallec2c88f12007-03-16 13:38:30 -0800769 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770 visual_init(vc, currcons, 1);
771 if (!*vc->vc_uni_pagedir_loc)
772 con_set_default_unimap(vc);
Catalin Marinas254e9482006-09-29 02:00:25 -0700773 if (!vc->vc_kmalloced)
774 vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775 if (!vc->vc_screenbuf) {
776 kfree(vc);
777 vc_cons[currcons].d = NULL;
778 return -ENOMEM;
779 }
780 vc->vc_kmalloced = 1;
781 vc_init(vc, vc->vc_rows, vc->vc_cols, 1);
Kay Sievers4995f8e2009-03-09 14:18:52 +0100782 vcs_make_sysfs(currcons);
Samuel Thibaultb293d752007-10-18 23:39:17 -0700783 atomic_notifier_call_chain(&vt_notifier_list, VT_ALLOCATE, &param);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700784 }
785 return 0;
786}
787
Antonino A. Daplase400b6e2007-10-16 01:29:35 -0700788static inline int resize_screen(struct vc_data *vc, int width, int height,
789 int user)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700790{
791 /* Resizes the resolution of the display adapater */
792 int err = 0;
793
794 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize)
Antonino A. Daplase400b6e2007-10-16 01:29:35 -0700795 err = vc->vc_sw->con_resize(vc, width, height, user);
796
Linus Torvalds1da177e2005-04-16 15:20:36 -0700797 return err;
798}
799
800/*
801 * Change # of rows and columns (0 means unchanged/the size of fg_console)
802 * [this is to be used together with some user program
803 * like resize that changes the hardware videomode]
804 */
805#define VC_RESIZE_MAXCOL (32767)
806#define VC_RESIZE_MAXROW (32767)
Alan Cox8c9a9dd2008-08-15 10:39:38 +0100807
808/**
809 * vc_do_resize - resizing method for the tty
810 * @tty: tty being resized
811 * @real_tty: real tty (different to tty if a pty/tty pair)
812 * @vc: virtual console private data
813 * @cols: columns
814 * @lines: lines
815 *
816 * Resize a virtual console, clipping according to the actual constraints.
817 * If the caller passes a tty structure then update the termios winsize
818 * information and perform any neccessary signal handling.
819 *
820 * Caller must hold the console semaphore. Takes the termios mutex and
821 * ctrl_lock of the tty IFF a tty is passed.
822 */
823
Alan Coxfc6f6232009-01-02 13:43:17 +0000824static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc,
825 unsigned int cols, unsigned int lines)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826{
827 unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0;
828 unsigned int old_cols, old_rows, old_row_size, old_screen_size;
829 unsigned int new_cols, new_rows, new_row_size, new_screen_size;
Antonino A. Daplase400b6e2007-10-16 01:29:35 -0700830 unsigned int end, user;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831 unsigned short *newscreen;
832
833 WARN_CONSOLE_UNLOCKED();
834
835 if (!vc)
836 return -ENXIO;
837
Antonino A. Daplase400b6e2007-10-16 01:29:35 -0700838 user = vc->vc_resize_user;
839 vc->vc_resize_user = 0;
840
Linus Torvalds1da177e2005-04-16 15:20:36 -0700841 if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW)
842 return -EINVAL;
843
844 new_cols = (cols ? cols : vc->vc_cols);
845 new_rows = (lines ? lines : vc->vc_rows);
846 new_row_size = new_cols << 1;
847 new_screen_size = new_row_size * new_rows;
848
849 if (new_cols == vc->vc_cols && new_rows == vc->vc_rows)
850 return 0;
851
Robert P. J. Day5cbded52006-12-13 00:35:56 -0800852 newscreen = kmalloc(new_screen_size, GFP_USER);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853 if (!newscreen)
854 return -ENOMEM;
855
856 old_rows = vc->vc_rows;
857 old_cols = vc->vc_cols;
858 old_row_size = vc->vc_size_row;
859 old_screen_size = vc->vc_screenbuf_size;
860
Antonino A. Daplase400b6e2007-10-16 01:29:35 -0700861 err = resize_screen(vc, new_cols, new_rows, user);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862 if (err) {
863 kfree(newscreen);
864 return err;
865 }
866
867 vc->vc_rows = new_rows;
868 vc->vc_cols = new_cols;
869 vc->vc_size_row = new_row_size;
870 vc->vc_screenbuf_size = new_screen_size;
871
872 rlth = min(old_row_size, new_row_size);
873 rrem = new_row_size - rlth;
874 old_origin = vc->vc_origin;
875 new_origin = (long) newscreen;
876 new_scr_end = new_origin + new_screen_size;
Antonino A. Daplas3b41dc12005-09-09 13:04:39 -0700877
878 if (vc->vc_y > new_rows) {
879 if (old_rows - vc->vc_y < new_rows) {
880 /*
881 * Cursor near the bottom, copy contents from the
882 * bottom of buffer
883 */
884 old_origin += (old_rows - new_rows) * old_row_size;
885 end = vc->vc_scr_end;
886 } else {
887 /*
888 * Cursor is in no man's land, copy 1/2 screenful
889 * from the top and bottom of cursor position
890 */
891 old_origin += (vc->vc_y - new_rows/2) * old_row_size;
Antonino A. Daplas065d9ca2005-09-15 21:34:33 +0800892 end = old_origin + (old_row_size * new_rows);
Antonino A. Daplas3b41dc12005-09-09 13:04:39 -0700893 }
894 } else
895 /*
896 * Cursor near the top, copy contents from the top of buffer
897 */
Antonino A. Daplas065d9ca2005-09-15 21:34:33 +0800898 end = (old_rows > new_rows) ? old_origin +
899 (old_row_size * new_rows) :
Antonino A. Daplas3b41dc12005-09-09 13:04:39 -0700900 vc->vc_scr_end;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700901
902 update_attr(vc);
903
Antonino A. Daplas3b41dc12005-09-09 13:04:39 -0700904 while (old_origin < end) {
905 scr_memcpyw((unsigned short *) new_origin,
906 (unsigned short *) old_origin, rlth);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700907 if (rrem)
Antonino A. Daplas3b41dc12005-09-09 13:04:39 -0700908 scr_memsetw((void *)(new_origin + rlth),
909 vc->vc_video_erase_char, rrem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700910 old_origin += old_row_size;
911 new_origin += new_row_size;
912 }
913 if (new_scr_end > new_origin)
Antonino A. Daplas3b41dc12005-09-09 13:04:39 -0700914 scr_memsetw((void *)new_origin, vc->vc_video_erase_char,
915 new_scr_end - new_origin);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700916 if (vc->vc_kmalloced)
917 kfree(vc->vc_screenbuf);
918 vc->vc_screenbuf = newscreen;
919 vc->vc_kmalloced = 1;
920 vc->vc_screenbuf_size = new_screen_size;
921 set_origin(vc);
922
923 /* do part of a reset_terminal() */
924 vc->vc_top = 0;
925 vc->vc_bottom = vc->vc_rows;
926 gotoxy(vc, vc->vc_x, vc->vc_y);
927 save_cur(vc);
928
Alan Cox8c9a9dd2008-08-15 10:39:38 +0100929 if (tty) {
930 /* Rewrite the requested winsize data with the actual
931 resulting sizes */
932 struct winsize ws;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700933 memset(&ws, 0, sizeof(ws));
934 ws.ws_row = vc->vc_rows;
935 ws.ws_col = vc->vc_cols;
936 ws.ws_ypixel = vc->vc_scan_lines;
Alan Coxfc6f6232009-01-02 13:43:17 +0000937 tty_do_resize(tty, &ws);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700938 }
939
940 if (CON_IS_VISIBLE(vc))
941 update_screen(vc);
942 return err;
943}
944
Alan Cox8c9a9dd2008-08-15 10:39:38 +0100945/**
946 * vc_resize - resize a VT
947 * @vc: virtual console
948 * @cols: columns
949 * @rows: rows
950 *
951 * Resize a virtual console as seen from the console end of things. We
952 * use the common vc_do_resize methods to update the structures. The
953 * caller must hold the console sem to protect console internals and
954 * vc->vc_tty
955 */
956
957int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int rows)
Alan Coxca9bda02006-09-29 02:00:03 -0700958{
Alan Coxfc6f6232009-01-02 13:43:17 +0000959 return vc_do_resize(vc->vc_tty, vc, cols, rows);
Alan Cox8c9a9dd2008-08-15 10:39:38 +0100960}
961
962/**
963 * vt_resize - resize a VT
964 * @tty: tty to resize
Alan Cox8c9a9dd2008-08-15 10:39:38 +0100965 * @ws: winsize attributes
966 *
967 * Resize a virtual terminal. This is called by the tty layer as we
968 * register our own handler for resizing. The mutual helper does all
969 * the actual work.
970 *
971 * Takes the console sem and the called methods then take the tty
972 * termios_mutex and the tty ctrl_lock in that order.
973 */
Roel Kluinda2bdf92009-01-07 18:09:15 -0800974static int vt_resize(struct tty_struct *tty, struct winsize *ws)
Alan Cox8c9a9dd2008-08-15 10:39:38 +0100975{
976 struct vc_data *vc = tty->driver_data;
977 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700978
Alan Coxca9bda02006-09-29 02:00:03 -0700979 acquire_console_sem();
Alan Coxfc6f6232009-01-02 13:43:17 +0000980 ret = vc_do_resize(tty, vc, ws->ws_col, ws->ws_row);
Alan Coxca9bda02006-09-29 02:00:03 -0700981 release_console_sem();
Alan Cox8c9a9dd2008-08-15 10:39:38 +0100982 return ret;
Alan Coxca9bda02006-09-29 02:00:03 -0700983}
984
985void vc_deallocate(unsigned int currcons)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700986{
987 WARN_CONSOLE_UNLOCKED();
988
989 if (vc_cons_allocated(currcons)) {
990 struct vc_data *vc = vc_cons[currcons].d;
Samuel Thibaultb293d752007-10-18 23:39:17 -0700991 struct vt_notifier_param param = { .vc = vc };
Kay Sievers4995f8e2009-03-09 14:18:52 +0100992
Samuel Thibaultb293d752007-10-18 23:39:17 -0700993 atomic_notifier_call_chain(&vt_notifier_list, VT_DEALLOCATE, &param);
Kay Sievers4995f8e2009-03-09 14:18:52 +0100994 vcs_remove_sysfs(currcons);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700995 vc->vc_sw->con_deinit(vc);
Eric W. Biedermanbde0d2c92006-10-02 02:17:14 -0700996 put_pid(vc->vt_pid);
Antonino A. Daplasd459ec02006-07-03 00:24:20 -0700997 module_put(vc->vc_sw->owner);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700998 if (vc->vc_kmalloced)
999 kfree(vc->vc_screenbuf);
1000 if (currcons >= MIN_NR_CONSOLES)
1001 kfree(vc);
1002 vc_cons[currcons].d = NULL;
1003 }
1004}
1005
1006/*
1007 * VT102 emulator
1008 */
1009
1010#define set_kbd(vc, x) set_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1011#define clr_kbd(vc, x) clr_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1012#define is_kbd(vc, x) vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1013
1014#define decarm VC_REPEAT
1015#define decckm VC_CKMODE
1016#define kbdapplic VC_APPLIC
1017#define lnm VC_CRLF
1018
1019/*
1020 * this is what the terminal answers to a ESC-Z or csi0c query.
1021 */
1022#define VT100ID "\033[?1;2c"
1023#define VT102ID "\033[?6c"
1024
1025unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7,
1026 8,12,10,14, 9,13,11,15 };
1027
1028/* the default colour table, for VGA+ colour systems */
1029int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
1030 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
1031int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
1032 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
1033int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
1034 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
1035
Jan Engelhardt1c2bbe62007-05-08 00:38:03 -07001036module_param_array(default_red, int, NULL, S_IRUGO | S_IWUSR);
1037module_param_array(default_grn, int, NULL, S_IRUGO | S_IWUSR);
1038module_param_array(default_blu, int, NULL, S_IRUGO | S_IWUSR);
1039
Linus Torvalds1da177e2005-04-16 15:20:36 -07001040/*
1041 * gotoxy() must verify all boundaries, because the arguments
1042 * might also be negative. If the given position is out of
1043 * bounds, the cursor is placed at the nearest margin.
1044 */
1045static void gotoxy(struct vc_data *vc, int new_x, int new_y)
1046{
1047 int min_y, max_y;
1048
1049 if (new_x < 0)
1050 vc->vc_x = 0;
1051 else {
1052 if (new_x >= vc->vc_cols)
1053 vc->vc_x = vc->vc_cols - 1;
1054 else
1055 vc->vc_x = new_x;
1056 }
1057
1058 if (vc->vc_decom) {
1059 min_y = vc->vc_top;
1060 max_y = vc->vc_bottom;
1061 } else {
1062 min_y = 0;
1063 max_y = vc->vc_rows;
1064 }
1065 if (new_y < min_y)
1066 vc->vc_y = min_y;
1067 else if (new_y >= max_y)
1068 vc->vc_y = max_y - 1;
1069 else
1070 vc->vc_y = new_y;
1071 vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1);
1072 vc->vc_need_wrap = 0;
1073}
1074
1075/* for absolute user moves, when decom is set */
1076static void gotoxay(struct vc_data *vc, int new_x, int new_y)
1077{
1078 gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y);
1079}
1080
1081void scrollback(struct vc_data *vc, int lines)
1082{
1083 if (!lines)
1084 lines = vc->vc_rows / 2;
1085 scrolldelta(-lines);
1086}
1087
1088void scrollfront(struct vc_data *vc, int lines)
1089{
1090 if (!lines)
1091 lines = vc->vc_rows / 2;
1092 scrolldelta(lines);
1093}
1094
1095static void lf(struct vc_data *vc)
1096{
1097 /* don't scroll if above bottom of scrolling region, or
1098 * if below scrolling region
1099 */
1100 if (vc->vc_y + 1 == vc->vc_bottom)
1101 scrup(vc, vc->vc_top, vc->vc_bottom, 1);
1102 else if (vc->vc_y < vc->vc_rows - 1) {
1103 vc->vc_y++;
1104 vc->vc_pos += vc->vc_size_row;
1105 }
1106 vc->vc_need_wrap = 0;
Samuel Thibaultb293d752007-10-18 23:39:17 -07001107 notify_write(vc, '\n');
Linus Torvalds1da177e2005-04-16 15:20:36 -07001108}
1109
1110static void ri(struct vc_data *vc)
1111{
1112 /* don't scroll if below top of scrolling region, or
1113 * if above scrolling region
1114 */
1115 if (vc->vc_y == vc->vc_top)
1116 scrdown(vc, vc->vc_top, vc->vc_bottom, 1);
1117 else if (vc->vc_y > 0) {
1118 vc->vc_y--;
1119 vc->vc_pos -= vc->vc_size_row;
1120 }
1121 vc->vc_need_wrap = 0;
1122}
1123
1124static inline void cr(struct vc_data *vc)
1125{
1126 vc->vc_pos -= vc->vc_x << 1;
1127 vc->vc_need_wrap = vc->vc_x = 0;
Samuel Thibaultb293d752007-10-18 23:39:17 -07001128 notify_write(vc, '\r');
Linus Torvalds1da177e2005-04-16 15:20:36 -07001129}
1130
1131static inline void bs(struct vc_data *vc)
1132{
1133 if (vc->vc_x) {
1134 vc->vc_pos -= 2;
1135 vc->vc_x--;
1136 vc->vc_need_wrap = 0;
Samuel Thibaultb293d752007-10-18 23:39:17 -07001137 notify_write(vc, '\b');
Linus Torvalds1da177e2005-04-16 15:20:36 -07001138 }
1139}
1140
1141static inline void del(struct vc_data *vc)
1142{
1143 /* ignored */
1144}
1145
1146static void csi_J(struct vc_data *vc, int vpar)
1147{
1148 unsigned int count;
1149 unsigned short * start;
1150
1151 switch (vpar) {
1152 case 0: /* erase from cursor to end of display */
1153 count = (vc->vc_scr_end - vc->vc_pos) >> 1;
1154 start = (unsigned short *)vc->vc_pos;
1155 if (DO_UPDATE(vc)) {
1156 /* do in two stages */
1157 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1158 vc->vc_cols - vc->vc_x);
1159 vc->vc_sw->con_clear(vc, vc->vc_y + 1, 0,
1160 vc->vc_rows - vc->vc_y - 1,
1161 vc->vc_cols);
1162 }
1163 break;
1164 case 1: /* erase from start to cursor */
1165 count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1;
1166 start = (unsigned short *)vc->vc_origin;
1167 if (DO_UPDATE(vc)) {
1168 /* do in two stages */
1169 vc->vc_sw->con_clear(vc, 0, 0, vc->vc_y,
1170 vc->vc_cols);
1171 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1172 vc->vc_x + 1);
1173 }
1174 break;
1175 case 2: /* erase whole display */
1176 count = vc->vc_cols * vc->vc_rows;
1177 start = (unsigned short *)vc->vc_origin;
1178 if (DO_UPDATE(vc))
1179 vc->vc_sw->con_clear(vc, 0, 0,
1180 vc->vc_rows,
1181 vc->vc_cols);
1182 break;
1183 default:
1184 return;
1185 }
1186 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1187 vc->vc_need_wrap = 0;
1188}
1189
1190static void csi_K(struct vc_data *vc, int vpar)
1191{
1192 unsigned int count;
1193 unsigned short * start;
1194
1195 switch (vpar) {
1196 case 0: /* erase from cursor to end of line */
1197 count = vc->vc_cols - vc->vc_x;
1198 start = (unsigned short *)vc->vc_pos;
1199 if (DO_UPDATE(vc))
1200 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1201 vc->vc_cols - vc->vc_x);
1202 break;
1203 case 1: /* erase from start of line to cursor */
1204 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1205 count = vc->vc_x + 1;
1206 if (DO_UPDATE(vc))
1207 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1208 vc->vc_x + 1);
1209 break;
1210 case 2: /* erase whole line */
1211 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1212 count = vc->vc_cols;
1213 if (DO_UPDATE(vc))
1214 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1215 vc->vc_cols);
1216 break;
1217 default:
1218 return;
1219 }
1220 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1221 vc->vc_need_wrap = 0;
1222}
1223
1224static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */
1225{ /* not vt100? */
1226 int count;
1227
1228 if (!vpar)
1229 vpar++;
1230 count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar;
1231
1232 scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count);
1233 if (DO_UPDATE(vc))
1234 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count);
1235 vc->vc_need_wrap = 0;
1236}
1237
1238static void default_attr(struct vc_data *vc)
1239{
1240 vc->vc_intensity = 1;
Jan Engelhardtfa6ce9a2007-05-08 00:38:04 -07001241 vc->vc_italic = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242 vc->vc_underline = 0;
1243 vc->vc_reverse = 0;
1244 vc->vc_blink = 0;
1245 vc->vc_color = vc->vc_def_color;
1246}
1247
1248/* console_sem is held */
1249static void csi_m(struct vc_data *vc)
1250{
1251 int i;
1252
1253 for (i = 0; i <= vc->vc_npar; i++)
1254 switch (vc->vc_par[i]) {
1255 case 0: /* all attributes off */
1256 default_attr(vc);
1257 break;
1258 case 1:
1259 vc->vc_intensity = 2;
1260 break;
1261 case 2:
1262 vc->vc_intensity = 0;
1263 break;
Jan Engelhardtfa6ce9a2007-05-08 00:38:04 -07001264 case 3:
1265 vc->vc_italic = 1;
1266 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001267 case 4:
1268 vc->vc_underline = 1;
1269 break;
1270 case 5:
1271 vc->vc_blink = 1;
1272 break;
1273 case 7:
1274 vc->vc_reverse = 1;
1275 break;
1276 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1277 * Select primary font, don't display
1278 * control chars if defined, don't set
1279 * bit 8 on output.
1280 */
1281 vc->vc_translate = set_translate(vc->vc_charset == 0
1282 ? vc->vc_G0_charset
1283 : vc->vc_G1_charset, vc);
1284 vc->vc_disp_ctrl = 0;
1285 vc->vc_toggle_meta = 0;
1286 break;
1287 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1288 * Select first alternate font, lets
1289 * chars < 32 be displayed as ROM chars.
1290 */
1291 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1292 vc->vc_disp_ctrl = 1;
1293 vc->vc_toggle_meta = 0;
1294 break;
1295 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1296 * Select second alternate font, toggle
1297 * high bit before displaying as ROM char.
1298 */
1299 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1300 vc->vc_disp_ctrl = 1;
1301 vc->vc_toggle_meta = 1;
1302 break;
1303 case 21:
1304 case 22:
1305 vc->vc_intensity = 1;
1306 break;
Jan Engelhardtfa6ce9a2007-05-08 00:38:04 -07001307 case 23:
1308 vc->vc_italic = 0;
1309 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001310 case 24:
1311 vc->vc_underline = 0;
1312 break;
1313 case 25:
1314 vc->vc_blink = 0;
1315 break;
1316 case 27:
1317 vc->vc_reverse = 0;
1318 break;
1319 case 38: /* ANSI X3.64-1979 (SCO-ish?)
1320 * Enables underscore, white foreground
1321 * with white underscore (Linux - use
1322 * default foreground).
1323 */
1324 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1325 vc->vc_underline = 1;
1326 break;
1327 case 39: /* ANSI X3.64-1979 (SCO-ish?)
1328 * Disable underline option.
1329 * Reset colour to default? It did this
1330 * before...
1331 */
1332 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1333 vc->vc_underline = 0;
1334 break;
1335 case 49:
1336 vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f);
1337 break;
1338 default:
1339 if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37)
1340 vc->vc_color = color_table[vc->vc_par[i] - 30]
1341 | (vc->vc_color & 0xf0);
1342 else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47)
1343 vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4)
1344 | (vc->vc_color & 0x0f);
1345 break;
1346 }
1347 update_attr(vc);
1348}
1349
1350static void respond_string(const char *p, struct tty_struct *tty)
1351{
1352 while (*p) {
1353 tty_insert_flip_char(tty, *p, 0);
1354 p++;
1355 }
1356 con_schedule_flip(tty);
1357}
1358
1359static void cursor_report(struct vc_data *vc, struct tty_struct *tty)
1360{
1361 char buf[40];
1362
1363 sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1);
1364 respond_string(buf, tty);
1365}
1366
1367static inline void status_report(struct tty_struct *tty)
1368{
1369 respond_string("\033[0n", tty); /* Terminal ok */
1370}
1371
1372static inline void respond_ID(struct tty_struct * tty)
1373{
1374 respond_string(VT102ID, tty);
1375}
1376
1377void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry)
1378{
1379 char buf[8];
1380
1381 sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx),
1382 (char)('!' + mry));
1383 respond_string(buf, tty);
1384}
1385
1386/* invoked via ioctl(TIOCLINUX) and through set_selection */
1387int mouse_reporting(void)
1388{
1389 return vc_cons[fg_console].d->vc_report_mouse;
1390}
1391
1392/* console_sem is held */
1393static void set_mode(struct vc_data *vc, int on_off)
1394{
1395 int i;
1396
1397 for (i = 0; i <= vc->vc_npar; i++)
1398 if (vc->vc_ques) {
1399 switch(vc->vc_par[i]) { /* DEC private modes set/reset */
1400 case 1: /* Cursor keys send ^[Ox/^[[x */
1401 if (on_off)
1402 set_kbd(vc, decckm);
1403 else
1404 clr_kbd(vc, decckm);
1405 break;
1406 case 3: /* 80/132 mode switch unimplemented */
1407 vc->vc_deccolm = on_off;
1408#if 0
1409 vc_resize(deccolm ? 132 : 80, vc->vc_rows);
1410 /* this alone does not suffice; some user mode
1411 utility has to change the hardware regs */
1412#endif
1413 break;
1414 case 5: /* Inverted screen on/off */
1415 if (vc->vc_decscnm != on_off) {
1416 vc->vc_decscnm = on_off;
1417 invert_screen(vc, 0, vc->vc_screenbuf_size, 0);
1418 update_attr(vc);
1419 }
1420 break;
1421 case 6: /* Origin relative/absolute */
1422 vc->vc_decom = on_off;
1423 gotoxay(vc, 0, 0);
1424 break;
1425 case 7: /* Autowrap on/off */
1426 vc->vc_decawm = on_off;
1427 break;
1428 case 8: /* Autorepeat on/off */
1429 if (on_off)
1430 set_kbd(vc, decarm);
1431 else
1432 clr_kbd(vc, decarm);
1433 break;
1434 case 9:
1435 vc->vc_report_mouse = on_off ? 1 : 0;
1436 break;
1437 case 25: /* Cursor on/off */
1438 vc->vc_deccm = on_off;
1439 break;
1440 case 1000:
1441 vc->vc_report_mouse = on_off ? 2 : 0;
1442 break;
1443 }
1444 } else {
1445 switch(vc->vc_par[i]) { /* ANSI modes set/reset */
1446 case 3: /* Monitor (display ctrls) */
1447 vc->vc_disp_ctrl = on_off;
1448 break;
1449 case 4: /* Insert Mode on/off */
1450 vc->vc_decim = on_off;
1451 break;
1452 case 20: /* Lf, Enter == CrLf/Lf */
1453 if (on_off)
1454 set_kbd(vc, lnm);
1455 else
1456 clr_kbd(vc, lnm);
1457 break;
1458 }
1459 }
1460}
1461
1462/* console_sem is held */
1463static void setterm_command(struct vc_data *vc)
1464{
1465 switch(vc->vc_par[0]) {
1466 case 1: /* set color for underline mode */
1467 if (vc->vc_can_do_color &&
1468 vc->vc_par[1] < 16) {
1469 vc->vc_ulcolor = color_table[vc->vc_par[1]];
1470 if (vc->vc_underline)
1471 update_attr(vc);
1472 }
1473 break;
1474 case 2: /* set color for half intensity mode */
1475 if (vc->vc_can_do_color &&
1476 vc->vc_par[1] < 16) {
1477 vc->vc_halfcolor = color_table[vc->vc_par[1]];
1478 if (vc->vc_intensity == 0)
1479 update_attr(vc);
1480 }
1481 break;
1482 case 8: /* store colors as defaults */
1483 vc->vc_def_color = vc->vc_attr;
1484 if (vc->vc_hi_font_mask == 0x100)
1485 vc->vc_def_color >>= 1;
1486 default_attr(vc);
1487 update_attr(vc);
1488 break;
1489 case 9: /* set blanking interval */
Daniel Mackf324edc2009-06-16 15:33:52 -07001490 blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001491 poke_blanked_console();
1492 break;
1493 case 10: /* set bell frequency in Hz */
1494 if (vc->vc_npar >= 1)
1495 vc->vc_bell_pitch = vc->vc_par[1];
1496 else
1497 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1498 break;
1499 case 11: /* set bell duration in msec */
1500 if (vc->vc_npar >= 1)
1501 vc->vc_bell_duration = (vc->vc_par[1] < 2000) ?
1502 vc->vc_par[1] * HZ / 1000 : 0;
1503 else
1504 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1505 break;
1506 case 12: /* bring specified console to the front */
1507 if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1))
1508 set_console(vc->vc_par[1] - 1);
1509 break;
1510 case 13: /* unblank the screen */
1511 poke_blanked_console();
1512 break;
1513 case 14: /* set vesa powerdown interval */
1514 vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1515 break;
1516 case 15: /* activate the previous console */
1517 set_console(last_console);
1518 break;
1519 }
1520}
1521
1522/* console_sem is held */
1523static void csi_at(struct vc_data *vc, unsigned int nr)
1524{
1525 if (nr > vc->vc_cols - vc->vc_x)
1526 nr = vc->vc_cols - vc->vc_x;
1527 else if (!nr)
1528 nr = 1;
1529 insert_char(vc, nr);
1530}
1531
1532/* console_sem is held */
1533static void csi_L(struct vc_data *vc, unsigned int nr)
1534{
1535 if (nr > vc->vc_rows - vc->vc_y)
1536 nr = vc->vc_rows - vc->vc_y;
1537 else if (!nr)
1538 nr = 1;
1539 scrdown(vc, vc->vc_y, vc->vc_bottom, nr);
1540 vc->vc_need_wrap = 0;
1541}
1542
1543/* console_sem is held */
1544static void csi_P(struct vc_data *vc, unsigned int nr)
1545{
1546 if (nr > vc->vc_cols - vc->vc_x)
1547 nr = vc->vc_cols - vc->vc_x;
1548 else if (!nr)
1549 nr = 1;
1550 delete_char(vc, nr);
1551}
1552
1553/* console_sem is held */
1554static void csi_M(struct vc_data *vc, unsigned int nr)
1555{
1556 if (nr > vc->vc_rows - vc->vc_y)
1557 nr = vc->vc_rows - vc->vc_y;
1558 else if (!nr)
1559 nr=1;
1560 scrup(vc, vc->vc_y, vc->vc_bottom, nr);
1561 vc->vc_need_wrap = 0;
1562}
1563
1564/* console_sem is held (except via vc_init->reset_terminal */
1565static void save_cur(struct vc_data *vc)
1566{
1567 vc->vc_saved_x = vc->vc_x;
1568 vc->vc_saved_y = vc->vc_y;
1569 vc->vc_s_intensity = vc->vc_intensity;
Jan Engelhardtfa6ce9a2007-05-08 00:38:04 -07001570 vc->vc_s_italic = vc->vc_italic;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001571 vc->vc_s_underline = vc->vc_underline;
1572 vc->vc_s_blink = vc->vc_blink;
1573 vc->vc_s_reverse = vc->vc_reverse;
1574 vc->vc_s_charset = vc->vc_charset;
1575 vc->vc_s_color = vc->vc_color;
1576 vc->vc_saved_G0 = vc->vc_G0_charset;
1577 vc->vc_saved_G1 = vc->vc_G1_charset;
1578}
1579
1580/* console_sem is held */
1581static void restore_cur(struct vc_data *vc)
1582{
1583 gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y);
1584 vc->vc_intensity = vc->vc_s_intensity;
Jan Engelhardtfa6ce9a2007-05-08 00:38:04 -07001585 vc->vc_italic = vc->vc_s_italic;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001586 vc->vc_underline = vc->vc_s_underline;
1587 vc->vc_blink = vc->vc_s_blink;
1588 vc->vc_reverse = vc->vc_s_reverse;
1589 vc->vc_charset = vc->vc_s_charset;
1590 vc->vc_color = vc->vc_s_color;
1591 vc->vc_G0_charset = vc->vc_saved_G0;
1592 vc->vc_G1_charset = vc->vc_saved_G1;
1593 vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc);
1594 update_attr(vc);
1595 vc->vc_need_wrap = 0;
1596}
1597
1598enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey,
1599 EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd,
1600 ESpalette };
1601
1602/* console_sem is held (except via vc_init()) */
1603static void reset_terminal(struct vc_data *vc, int do_clear)
1604{
1605 vc->vc_top = 0;
1606 vc->vc_bottom = vc->vc_rows;
1607 vc->vc_state = ESnormal;
1608 vc->vc_ques = 0;
1609 vc->vc_translate = set_translate(LAT1_MAP, vc);
1610 vc->vc_G0_charset = LAT1_MAP;
1611 vc->vc_G1_charset = GRAF_MAP;
1612 vc->vc_charset = 0;
1613 vc->vc_need_wrap = 0;
1614 vc->vc_report_mouse = 0;
Antonino A. Daplas042f10e2007-05-08 00:38:09 -07001615 vc->vc_utf = default_utf8;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001616 vc->vc_utf_count = 0;
1617
1618 vc->vc_disp_ctrl = 0;
1619 vc->vc_toggle_meta = 0;
1620
1621 vc->vc_decscnm = 0;
1622 vc->vc_decom = 0;
1623 vc->vc_decawm = 1;
1624 vc->vc_deccm = 1;
1625 vc->vc_decim = 0;
1626
1627 set_kbd(vc, decarm);
1628 clr_kbd(vc, decckm);
1629 clr_kbd(vc, kbdapplic);
1630 clr_kbd(vc, lnm);
1631 kbd_table[vc->vc_num].lockstate = 0;
1632 kbd_table[vc->vc_num].slockstate = 0;
1633 kbd_table[vc->vc_num].ledmode = LED_SHOW_FLAGS;
1634 kbd_table[vc->vc_num].ledflagstate = kbd_table[vc->vc_num].default_ledflagstate;
1635 /* do not do set_leds here because this causes an endless tasklet loop
1636 when the keyboard hasn't been initialized yet */
1637
1638 vc->vc_cursor_type = CUR_DEFAULT;
1639 vc->vc_complement_mask = vc->vc_s_complement_mask;
1640
1641 default_attr(vc);
1642 update_attr(vc);
1643
1644 vc->vc_tab_stop[0] = 0x01010100;
1645 vc->vc_tab_stop[1] =
1646 vc->vc_tab_stop[2] =
1647 vc->vc_tab_stop[3] =
Wolfgang Kroworscha5647382008-11-06 12:53:16 -08001648 vc->vc_tab_stop[4] =
1649 vc->vc_tab_stop[5] =
1650 vc->vc_tab_stop[6] =
1651 vc->vc_tab_stop[7] = 0x01010101;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001652
1653 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1654 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1655
1656 gotoxy(vc, 0, 0);
1657 save_cur(vc);
1658 if (do_clear)
1659 csi_J(vc, 2);
1660}
1661
1662/* console_sem is held */
1663static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
1664{
1665 /*
1666 * Control characters can be used in the _middle_
1667 * of an escape sequence.
1668 */
1669 switch (c) {
1670 case 0:
1671 return;
1672 case 7:
1673 if (vc->vc_bell_duration)
1674 kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration);
1675 return;
1676 case 8:
1677 bs(vc);
1678 return;
1679 case 9:
1680 vc->vc_pos -= (vc->vc_x << 1);
1681 while (vc->vc_x < vc->vc_cols - 1) {
1682 vc->vc_x++;
1683 if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31)))
1684 break;
1685 }
1686 vc->vc_pos += (vc->vc_x << 1);
Samuel Thibaultb293d752007-10-18 23:39:17 -07001687 notify_write(vc, '\t');
Linus Torvalds1da177e2005-04-16 15:20:36 -07001688 return;
1689 case 10: case 11: case 12:
1690 lf(vc);
1691 if (!is_kbd(vc, lnm))
1692 return;
1693 case 13:
1694 cr(vc);
1695 return;
1696 case 14:
1697 vc->vc_charset = 1;
1698 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1699 vc->vc_disp_ctrl = 1;
1700 return;
1701 case 15:
1702 vc->vc_charset = 0;
1703 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1704 vc->vc_disp_ctrl = 0;
1705 return;
1706 case 24: case 26:
1707 vc->vc_state = ESnormal;
1708 return;
1709 case 27:
1710 vc->vc_state = ESesc;
1711 return;
1712 case 127:
1713 del(vc);
1714 return;
1715 case 128+27:
1716 vc->vc_state = ESsquare;
1717 return;
1718 }
1719 switch(vc->vc_state) {
1720 case ESesc:
1721 vc->vc_state = ESnormal;
1722 switch (c) {
1723 case '[':
1724 vc->vc_state = ESsquare;
1725 return;
1726 case ']':
1727 vc->vc_state = ESnonstd;
1728 return;
1729 case '%':
1730 vc->vc_state = ESpercent;
1731 return;
1732 case 'E':
1733 cr(vc);
1734 lf(vc);
1735 return;
1736 case 'M':
1737 ri(vc);
1738 return;
1739 case 'D':
1740 lf(vc);
1741 return;
1742 case 'H':
1743 vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31));
1744 return;
1745 case 'Z':
1746 respond_ID(tty);
1747 return;
1748 case '7':
1749 save_cur(vc);
1750 return;
1751 case '8':
1752 restore_cur(vc);
1753 return;
1754 case '(':
1755 vc->vc_state = ESsetG0;
1756 return;
1757 case ')':
1758 vc->vc_state = ESsetG1;
1759 return;
1760 case '#':
1761 vc->vc_state = EShash;
1762 return;
1763 case 'c':
1764 reset_terminal(vc, 1);
1765 return;
1766 case '>': /* Numeric keypad */
1767 clr_kbd(vc, kbdapplic);
1768 return;
1769 case '=': /* Appl. keypad */
1770 set_kbd(vc, kbdapplic);
1771 return;
1772 }
1773 return;
1774 case ESnonstd:
1775 if (c=='P') { /* palette escape sequence */
1776 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1777 vc->vc_par[vc->vc_npar] = 0;
1778 vc->vc_npar = 0;
1779 vc->vc_state = ESpalette;
1780 return;
1781 } else if (c=='R') { /* reset palette */
1782 reset_palette(vc);
1783 vc->vc_state = ESnormal;
1784 } else
1785 vc->vc_state = ESnormal;
1786 return;
1787 case ESpalette:
1788 if ( (c>='0'&&c<='9') || (c>='A'&&c<='F') || (c>='a'&&c<='f') ) {
1789 vc->vc_par[vc->vc_npar++] = (c > '9' ? (c & 0xDF) - 'A' + 10 : c - '0');
1790 if (vc->vc_npar == 7) {
1791 int i = vc->vc_par[0] * 3, j = 1;
1792 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1793 vc->vc_palette[i++] += vc->vc_par[j++];
1794 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1795 vc->vc_palette[i++] += vc->vc_par[j++];
1796 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1797 vc->vc_palette[i] += vc->vc_par[j];
1798 set_palette(vc);
1799 vc->vc_state = ESnormal;
1800 }
1801 } else
1802 vc->vc_state = ESnormal;
1803 return;
1804 case ESsquare:
1805 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1806 vc->vc_par[vc->vc_npar] = 0;
1807 vc->vc_npar = 0;
1808 vc->vc_state = ESgetpars;
1809 if (c == '[') { /* Function key */
1810 vc->vc_state=ESfunckey;
1811 return;
1812 }
1813 vc->vc_ques = (c == '?');
1814 if (vc->vc_ques)
1815 return;
1816 case ESgetpars:
1817 if (c == ';' && vc->vc_npar < NPAR - 1) {
1818 vc->vc_npar++;
1819 return;
1820 } else if (c>='0' && c<='9') {
1821 vc->vc_par[vc->vc_npar] *= 10;
1822 vc->vc_par[vc->vc_npar] += c - '0';
1823 return;
1824 } else
1825 vc->vc_state = ESgotpars;
1826 case ESgotpars:
1827 vc->vc_state = ESnormal;
1828 switch(c) {
1829 case 'h':
1830 set_mode(vc, 1);
1831 return;
1832 case 'l':
1833 set_mode(vc, 0);
1834 return;
1835 case 'c':
1836 if (vc->vc_ques) {
1837 if (vc->vc_par[0])
1838 vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16);
1839 else
1840 vc->vc_cursor_type = CUR_DEFAULT;
1841 return;
1842 }
1843 break;
1844 case 'm':
1845 if (vc->vc_ques) {
1846 clear_selection();
1847 if (vc->vc_par[0])
1848 vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1];
1849 else
1850 vc->vc_complement_mask = vc->vc_s_complement_mask;
1851 return;
1852 }
1853 break;
1854 case 'n':
1855 if (!vc->vc_ques) {
1856 if (vc->vc_par[0] == 5)
1857 status_report(tty);
1858 else if (vc->vc_par[0] == 6)
1859 cursor_report(vc, tty);
1860 }
1861 return;
1862 }
1863 if (vc->vc_ques) {
1864 vc->vc_ques = 0;
1865 return;
1866 }
1867 switch(c) {
1868 case 'G': case '`':
1869 if (vc->vc_par[0])
1870 vc->vc_par[0]--;
1871 gotoxy(vc, vc->vc_par[0], vc->vc_y);
1872 return;
1873 case 'A':
1874 if (!vc->vc_par[0])
1875 vc->vc_par[0]++;
1876 gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]);
1877 return;
1878 case 'B': case 'e':
1879 if (!vc->vc_par[0])
1880 vc->vc_par[0]++;
1881 gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]);
1882 return;
1883 case 'C': case 'a':
1884 if (!vc->vc_par[0])
1885 vc->vc_par[0]++;
1886 gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y);
1887 return;
1888 case 'D':
1889 if (!vc->vc_par[0])
1890 vc->vc_par[0]++;
1891 gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y);
1892 return;
1893 case 'E':
1894 if (!vc->vc_par[0])
1895 vc->vc_par[0]++;
1896 gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]);
1897 return;
1898 case 'F':
1899 if (!vc->vc_par[0])
1900 vc->vc_par[0]++;
1901 gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]);
1902 return;
1903 case 'd':
1904 if (vc->vc_par[0])
1905 vc->vc_par[0]--;
1906 gotoxay(vc, vc->vc_x ,vc->vc_par[0]);
1907 return;
1908 case 'H': case 'f':
1909 if (vc->vc_par[0])
1910 vc->vc_par[0]--;
1911 if (vc->vc_par[1])
1912 vc->vc_par[1]--;
1913 gotoxay(vc, vc->vc_par[1], vc->vc_par[0]);
1914 return;
1915 case 'J':
1916 csi_J(vc, vc->vc_par[0]);
1917 return;
1918 case 'K':
1919 csi_K(vc, vc->vc_par[0]);
1920 return;
1921 case 'L':
1922 csi_L(vc, vc->vc_par[0]);
1923 return;
1924 case 'M':
1925 csi_M(vc, vc->vc_par[0]);
1926 return;
1927 case 'P':
1928 csi_P(vc, vc->vc_par[0]);
1929 return;
1930 case 'c':
1931 if (!vc->vc_par[0])
1932 respond_ID(tty);
1933 return;
1934 case 'g':
1935 if (!vc->vc_par[0])
1936 vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31));
1937 else if (vc->vc_par[0] == 3) {
1938 vc->vc_tab_stop[0] =
1939 vc->vc_tab_stop[1] =
1940 vc->vc_tab_stop[2] =
1941 vc->vc_tab_stop[3] =
Wolfgang Kroworscha5647382008-11-06 12:53:16 -08001942 vc->vc_tab_stop[4] =
1943 vc->vc_tab_stop[5] =
1944 vc->vc_tab_stop[6] =
1945 vc->vc_tab_stop[7] = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001946 }
1947 return;
1948 case 'm':
1949 csi_m(vc);
1950 return;
1951 case 'q': /* DECLL - but only 3 leds */
1952 /* map 0,1,2,3 to 0,1,2,4 */
1953 if (vc->vc_par[0] < 4)
1954 setledstate(kbd_table + vc->vc_num,
1955 (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4);
1956 return;
1957 case 'r':
1958 if (!vc->vc_par[0])
1959 vc->vc_par[0]++;
1960 if (!vc->vc_par[1])
1961 vc->vc_par[1] = vc->vc_rows;
1962 /* Minimum allowed region is 2 lines */
1963 if (vc->vc_par[0] < vc->vc_par[1] &&
1964 vc->vc_par[1] <= vc->vc_rows) {
1965 vc->vc_top = vc->vc_par[0] - 1;
1966 vc->vc_bottom = vc->vc_par[1];
1967 gotoxay(vc, 0, 0);
1968 }
1969 return;
1970 case 's':
1971 save_cur(vc);
1972 return;
1973 case 'u':
1974 restore_cur(vc);
1975 return;
1976 case 'X':
1977 csi_X(vc, vc->vc_par[0]);
1978 return;
1979 case '@':
1980 csi_at(vc, vc->vc_par[0]);
1981 return;
1982 case ']': /* setterm functions */
1983 setterm_command(vc);
1984 return;
1985 }
1986 return;
1987 case ESpercent:
1988 vc->vc_state = ESnormal;
1989 switch (c) {
1990 case '@': /* defined in ISO 2022 */
1991 vc->vc_utf = 0;
1992 return;
1993 case 'G': /* prelim official escape code */
1994 case '8': /* retained for compatibility */
1995 vc->vc_utf = 1;
1996 return;
1997 }
1998 return;
1999 case ESfunckey:
2000 vc->vc_state = ESnormal;
2001 return;
2002 case EShash:
2003 vc->vc_state = ESnormal;
2004 if (c == '8') {
2005 /* DEC screen alignment test. kludge :-) */
2006 vc->vc_video_erase_char =
2007 (vc->vc_video_erase_char & 0xff00) | 'E';
2008 csi_J(vc, 2);
2009 vc->vc_video_erase_char =
2010 (vc->vc_video_erase_char & 0xff00) | ' ';
2011 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
2012 }
2013 return;
2014 case ESsetG0:
2015 if (c == '0')
2016 vc->vc_G0_charset = GRAF_MAP;
2017 else if (c == 'B')
2018 vc->vc_G0_charset = LAT1_MAP;
2019 else if (c == 'U')
2020 vc->vc_G0_charset = IBMPC_MAP;
2021 else if (c == 'K')
2022 vc->vc_G0_charset = USER_MAP;
2023 if (vc->vc_charset == 0)
2024 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
2025 vc->vc_state = ESnormal;
2026 return;
2027 case ESsetG1:
2028 if (c == '0')
2029 vc->vc_G1_charset = GRAF_MAP;
2030 else if (c == 'B')
2031 vc->vc_G1_charset = LAT1_MAP;
2032 else if (c == 'U')
2033 vc->vc_G1_charset = IBMPC_MAP;
2034 else if (c == 'K')
2035 vc->vc_G1_charset = USER_MAP;
2036 if (vc->vc_charset == 1)
2037 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
2038 vc->vc_state = ESnormal;
2039 return;
2040 default:
2041 vc->vc_state = ESnormal;
2042 }
2043}
2044
2045/* This is a temporary buffer used to prepare a tty console write
2046 * so that we can easily avoid touching user space while holding the
2047 * console spinlock. It is allocated in con_init and is shared by
2048 * this code and the vc_screen read/write tty calls.
2049 *
2050 * We have to allocate this statically in the kernel data section
2051 * since console_init (and thus con_init) are called before any
2052 * kernel memory allocation is available.
2053 */
2054char con_buf[CON_BUF_SIZE];
Matthias Kaehlckec831c332007-05-08 00:39:49 -07002055DEFINE_MUTEX(con_buf_mtx);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002056
Egmont Koblinger2f1a2cc2007-05-08 00:30:37 -07002057/* is_double_width() is based on the wcwidth() implementation by
Egmont Koblinger1ed8a2b2007-06-23 17:16:27 -07002058 * Markus Kuhn -- 2007-05-26 (Unicode 5.0)
Egmont Koblinger2f1a2cc2007-05-08 00:30:37 -07002059 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
2060 */
2061struct interval {
2062 uint32_t first;
2063 uint32_t last;
2064};
2065
2066static int bisearch(uint32_t ucs, const struct interval *table, int max)
2067{
2068 int min = 0;
2069 int mid;
2070
2071 if (ucs < table[0].first || ucs > table[max].last)
2072 return 0;
2073 while (max >= min) {
2074 mid = (min + max) / 2;
2075 if (ucs > table[mid].last)
2076 min = mid + 1;
2077 else if (ucs < table[mid].first)
2078 max = mid - 1;
2079 else
2080 return 1;
2081 }
2082 return 0;
2083}
2084
2085static int is_double_width(uint32_t ucs)
2086{
2087 static const struct interval double_width[] = {
2088 { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E },
2089 { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF },
Egmont Koblinger1ed8a2b2007-06-23 17:16:27 -07002090 { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 },
2091 { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD }
Egmont Koblinger2f1a2cc2007-05-08 00:30:37 -07002092 };
Jiri Slaby0f115412007-07-17 04:05:21 -07002093 return bisearch(ucs, double_width, ARRAY_SIZE(double_width) - 1);
Egmont Koblinger2f1a2cc2007-05-08 00:30:37 -07002094}
2095
Linus Torvalds1da177e2005-04-16 15:20:36 -07002096/* acquires console_sem */
2097static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2098{
2099#ifdef VT_BUF_VRAM_ONLY
2100#define FLUSH do { } while(0);
2101#else
2102#define FLUSH if (draw_x >= 0) { \
2103 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
2104 draw_x = -1; \
2105 }
2106#endif
2107
2108 int c, tc, ok, n = 0, draw_x = -1;
2109 unsigned int currcons;
2110 unsigned long draw_from = 0, draw_to = 0;
2111 struct vc_data *vc;
Egmont Koblinger2f1a2cc2007-05-08 00:30:37 -07002112 unsigned char vc_attr;
Karl Dahlke0341a4d2008-04-28 02:14:25 -07002113 struct vt_notifier_param param;
Egmont Koblinger2f1a2cc2007-05-08 00:30:37 -07002114 uint8_t rescan;
2115 uint8_t inverse;
2116 uint8_t width;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002117 u16 himask, charmask;
2118 const unsigned char *orig_buf = NULL;
2119 int orig_count;
2120
2121 if (in_interrupt())
2122 return count;
2123
2124 might_sleep();
2125
2126 acquire_console_sem();
2127 vc = tty->driver_data;
2128 if (vc == NULL) {
2129 printk(KERN_ERR "vt: argh, driver_data is NULL !\n");
2130 release_console_sem();
2131 return 0;
2132 }
2133
2134 currcons = vc->vc_num;
2135 if (!vc_cons_allocated(currcons)) {
2136 /* could this happen? */
2137 static int error = 0;
2138 if (!error) {
2139 error = 1;
2140 printk("con_write: tty %d not allocated\n", currcons+1);
2141 }
2142 release_console_sem();
2143 return 0;
2144 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002145 orig_buf = buf;
2146 orig_count = count;
2147
Linus Torvalds1da177e2005-04-16 15:20:36 -07002148 himask = vc->vc_hi_font_mask;
2149 charmask = himask ? 0x1ff : 0xff;
2150
2151 /* undraw cursor first */
2152 if (IS_FG(vc))
2153 hide_cursor(vc);
2154
Karl Dahlke0341a4d2008-04-28 02:14:25 -07002155 param.vc = vc;
2156
Linus Torvalds1da177e2005-04-16 15:20:36 -07002157 while (!tty->stopped && count) {
2158 int orig = *buf;
2159 c = orig;
2160 buf++;
2161 n++;
2162 count--;
Egmont Koblinger2f1a2cc2007-05-08 00:30:37 -07002163 rescan = 0;
2164 inverse = 0;
2165 width = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002166
2167 /* Do no translation at all in control states */
2168 if (vc->vc_state != ESnormal) {
2169 tc = c;
Adam Tlalkad4328b42006-09-29 01:59:53 -07002170 } else if (vc->vc_utf && !vc->vc_disp_ctrl) {
Egmont Koblinger2f1a2cc2007-05-08 00:30:37 -07002171 /* Combine UTF-8 into Unicode in vc_utf_char.
2172 * vc_utf_count is the number of continuation bytes still
2173 * expected to arrive.
2174 * vc_npar is the number of continuation bytes arrived so
2175 * far
2176 */
Adam Tlalkad4328b42006-09-29 01:59:53 -07002177rescan_last_byte:
Egmont Koblinger2f1a2cc2007-05-08 00:30:37 -07002178 if ((c & 0xc0) == 0x80) {
2179 /* Continuation byte received */
2180 static const uint32_t utf8_length_changes[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff };
Adam Tlalkad4328b42006-09-29 01:59:53 -07002181 if (vc->vc_utf_count) {
Egmont Koblinger2f1a2cc2007-05-08 00:30:37 -07002182 vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f);
2183 vc->vc_npar++;
2184 if (--vc->vc_utf_count) {
2185 /* Still need some bytes */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002186 continue;
Egmont Koblinger2f1a2cc2007-05-08 00:30:37 -07002187 }
2188 /* Got a whole character */
2189 c = vc->vc_utf_char;
2190 /* Reject overlong sequences */
2191 if (c <= utf8_length_changes[vc->vc_npar - 1] ||
2192 c > utf8_length_changes[vc->vc_npar])
2193 c = 0xfffd;
2194 } else {
2195 /* Unexpected continuation byte */
2196 vc->vc_utf_count = 0;
2197 c = 0xfffd;
2198 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002199 } else {
Egmont Koblinger2f1a2cc2007-05-08 00:30:37 -07002200 /* Single ASCII byte or first byte of a sequence received */
2201 if (vc->vc_utf_count) {
2202 /* Continuation byte expected */
2203 rescan = 1;
2204 vc->vc_utf_count = 0;
2205 c = 0xfffd;
2206 } else if (c > 0x7f) {
2207 /* First byte of a multibyte sequence received */
2208 vc->vc_npar = 0;
2209 if ((c & 0xe0) == 0xc0) {
2210 vc->vc_utf_count = 1;
2211 vc->vc_utf_char = (c & 0x1f);
2212 } else if ((c & 0xf0) == 0xe0) {
2213 vc->vc_utf_count = 2;
2214 vc->vc_utf_char = (c & 0x0f);
2215 } else if ((c & 0xf8) == 0xf0) {
2216 vc->vc_utf_count = 3;
2217 vc->vc_utf_char = (c & 0x07);
2218 } else if ((c & 0xfc) == 0xf8) {
2219 vc->vc_utf_count = 4;
2220 vc->vc_utf_char = (c & 0x03);
2221 } else if ((c & 0xfe) == 0xfc) {
2222 vc->vc_utf_count = 5;
2223 vc->vc_utf_char = (c & 0x01);
2224 } else {
2225 /* 254 and 255 are invalid */
2226 c = 0xfffd;
2227 }
2228 if (vc->vc_utf_count) {
2229 /* Still need some bytes */
2230 continue;
2231 }
2232 }
2233 /* Nothing to do if an ASCII byte was received */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002234 }
Egmont Koblinger2f1a2cc2007-05-08 00:30:37 -07002235 /* End of UTF-8 decoding. */
2236 /* c is the received character, or U+FFFD for invalid sequences. */
2237 /* Replace invalid Unicode code points with U+FFFD too */
2238 if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff)
2239 c = 0xfffd;
2240 tc = c;
Adam Tlalkad4328b42006-09-29 01:59:53 -07002241 } else { /* no utf or alternate charset mode */
David Woodhousea29ccf6f82008-06-03 14:59:40 +01002242 tc = vc_translate(vc, c);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002243 }
2244
Karl Dahlke0341a4d2008-04-28 02:14:25 -07002245 param.c = tc;
2246 if (atomic_notifier_call_chain(&vt_notifier_list, VT_PREWRITE,
2247 &param) == NOTIFY_STOP)
2248 continue;
2249
Linus Torvalds1da177e2005-04-16 15:20:36 -07002250 /* If the original code was a control character we
2251 * only allow a glyph to be displayed if the code is
2252 * not normally used (such as for cursor movement) or
2253 * if the disp_ctrl mode has been explicitly enabled.
2254 * Certain characters (as given by the CTRL_ALWAYS
2255 * bitmap) are always displayed as control characters,
2256 * as the console would be pretty useless without
2257 * them; to display an arbitrary font position use the
2258 * direct-to-font zone in UTF-8 mode.
2259 */
2260 ok = tc && (c >= 32 ||
Adam Tlalkad4328b42006-09-29 01:59:53 -07002261 !(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 :
2262 vc->vc_utf || ((CTRL_ACTION >> c) & 1)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002263 && (c != 127 || vc->vc_disp_ctrl)
2264 && (c != 128+27);
2265
2266 if (vc->vc_state == ESnormal && ok) {
Egmont Koblinger2f1a2cc2007-05-08 00:30:37 -07002267 if (vc->vc_utf && !vc->vc_disp_ctrl) {
2268 if (is_double_width(c))
2269 width = 2;
2270 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002271 /* Now try to find out how to display it */
2272 tc = conv_uni_to_pc(vc, tc);
Adam Tlalkad4328b42006-09-29 01:59:53 -07002273 if (tc & ~charmask) {
Egmont Koblinger2f1a2cc2007-05-08 00:30:37 -07002274 if (tc == -1 || tc == -2) {
2275 continue; /* nothing to display */
2276 }
2277 /* Glyph not found */
Samuel Thibaultc0b79882009-04-18 22:17:17 +02002278 if ((!(vc->vc_utf && !vc->vc_disp_ctrl) || c < 128) && !(c & ~charmask)) {
Egmont Koblinger2f1a2cc2007-05-08 00:30:37 -07002279 /* In legacy mode use the glyph we get by a 1:1 mapping.
Egmont Koblinger1ed8a2b2007-06-23 17:16:27 -07002280 This would make absolutely no sense with Unicode in mind,
2281 but do this for ASCII characters since a font may lack
2282 Unicode mapping info and we don't want to end up with
2283 having question marks only. */
Egmont Koblinger2f1a2cc2007-05-08 00:30:37 -07002284 tc = c;
2285 } else {
2286 /* Display U+FFFD. If it's not found, display an inverse question mark. */
2287 tc = conv_uni_to_pc(vc, 0xfffd);
2288 if (tc < 0) {
2289 inverse = 1;
2290 tc = conv_uni_to_pc(vc, '?');
2291 if (tc < 0) tc = '?';
2292 }
2293 }
Adam Tlalkad4328b42006-09-29 01:59:53 -07002294 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002295
Egmont Koblinger2f1a2cc2007-05-08 00:30:37 -07002296 if (!inverse) {
2297 vc_attr = vc->vc_attr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002298 } else {
Egmont Koblinger2f1a2cc2007-05-08 00:30:37 -07002299 /* invert vc_attr */
2300 if (!vc->vc_can_do_color) {
2301 vc_attr = (vc->vc_attr) ^ 0x08;
2302 } else if (vc->vc_hi_font_mask == 0x100) {
2303 vc_attr = ((vc->vc_attr) & 0x11) | (((vc->vc_attr) & 0xe0) >> 4) | (((vc->vc_attr) & 0x0e) << 4);
2304 } else {
2305 vc_attr = ((vc->vc_attr) & 0x88) | (((vc->vc_attr) & 0x70) >> 4) | (((vc->vc_attr) & 0x07) << 4);
Adam Tlalkad4328b42006-09-29 01:59:53 -07002306 }
Egmont Koblinger1ed8a2b2007-06-23 17:16:27 -07002307 FLUSH
Egmont Koblinger2f1a2cc2007-05-08 00:30:37 -07002308 }
2309
2310 while (1) {
2311 if (vc->vc_need_wrap || vc->vc_decim)
2312 FLUSH
2313 if (vc->vc_need_wrap) {
2314 cr(vc);
2315 lf(vc);
2316 }
2317 if (vc->vc_decim)
2318 insert_char(vc, 1);
2319 scr_writew(himask ?
2320 ((vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) :
2321 (vc_attr << 8) + tc,
2322 (u16 *) vc->vc_pos);
2323 if (DO_UPDATE(vc) && draw_x < 0) {
2324 draw_x = vc->vc_x;
2325 draw_from = vc->vc_pos;
2326 }
2327 if (vc->vc_x == vc->vc_cols - 1) {
2328 vc->vc_need_wrap = vc->vc_decawm;
2329 draw_to = vc->vc_pos + 2;
2330 } else {
2331 vc->vc_x++;
2332 draw_to = (vc->vc_pos += 2);
2333 }
2334
2335 if (!--width) break;
2336
2337 tc = conv_uni_to_pc(vc, ' '); /* A space is printed in the second column */
2338 if (tc < 0) tc = ' ';
2339 }
Samuel Thibaultb293d752007-10-18 23:39:17 -07002340 notify_write(vc, c);
Egmont Koblinger2f1a2cc2007-05-08 00:30:37 -07002341
Egmont Koblinger1ed8a2b2007-06-23 17:16:27 -07002342 if (inverse) {
2343 FLUSH
2344 }
2345
Egmont Koblinger2f1a2cc2007-05-08 00:30:37 -07002346 if (rescan) {
2347 rescan = 0;
2348 inverse = 0;
2349 width = 1;
Adam Tlalkad4328b42006-09-29 01:59:53 -07002350 c = orig;
2351 goto rescan_last_byte;
2352 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002353 continue;
2354 }
2355 FLUSH
2356 do_con_trol(tty, vc, orig);
2357 }
2358 FLUSH
2359 console_conditional_schedule();
2360 release_console_sem();
Samuel Thibaultb293d752007-10-18 23:39:17 -07002361 notify_update(vc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002362 return n;
2363#undef FLUSH
2364}
2365
2366/*
2367 * This is the console switching callback.
2368 *
2369 * Doing console switching in a process context allows
2370 * us to do the switches asynchronously (needed when we want
2371 * to switch due to a keyboard interrupt). Synchronization
2372 * with other console code and prevention of re-entrancy is
2373 * ensured with console_sem.
2374 */
David Howells65f27f32006-11-22 14:55:48 +00002375static void console_callback(struct work_struct *ignored)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002376{
2377 acquire_console_sem();
2378
2379 if (want_console >= 0) {
2380 if (want_console != fg_console &&
2381 vc_cons_allocated(want_console)) {
2382 hide_cursor(vc_cons[fg_console].d);
2383 change_console(vc_cons[want_console].d);
2384 /* we only changed when the console had already
2385 been allocated - a new console is not created
2386 in an interrupt routine */
2387 }
2388 want_console = -1;
2389 }
2390 if (do_poke_blanked_console) { /* do not unblank for a LED change */
2391 do_poke_blanked_console = 0;
2392 poke_blanked_console();
2393 }
2394 if (scrollback_delta) {
2395 struct vc_data *vc = vc_cons[fg_console].d;
2396 clear_selection();
2397 if (vc->vc_mode == KD_TEXT)
2398 vc->vc_sw->con_scrolldelta(vc, scrollback_delta);
2399 scrollback_delta = 0;
2400 }
2401 if (blank_timer_expired) {
2402 do_blank_screen(0);
2403 blank_timer_expired = 0;
2404 }
Samuel Thibaultb293d752007-10-18 23:39:17 -07002405 notify_update(vc_cons[fg_console].d);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002406
2407 release_console_sem();
2408}
2409
Andrew Johnsonb257bc02007-03-16 13:38:24 -08002410int set_console(int nr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002411{
Andrew Johnsonb257bc02007-03-16 13:38:24 -08002412 struct vc_data *vc = vc_cons[fg_console].d;
2413
2414 if (!vc_cons_allocated(nr) || vt_dont_switch ||
2415 (vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) {
2416
2417 /*
2418 * Console switch will fail in console_callback() or
2419 * change_console() so there is no point scheduling
2420 * the callback
2421 *
2422 * Existing set_console() users don't check the return
2423 * value so this shouldn't break anything
2424 */
2425 return -EINVAL;
2426 }
2427
Linus Torvalds1da177e2005-04-16 15:20:36 -07002428 want_console = nr;
2429 schedule_console_callback();
Andrew Johnsonb257bc02007-03-16 13:38:24 -08002430
2431 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002432}
2433
2434struct tty_driver *console_driver;
2435
2436#ifdef CONFIG_VT_CONSOLE
2437
2438/*
2439 * Console on virtual terminal
2440 *
2441 * The console must be locked when we get here.
2442 */
2443
2444static void vt_console_print(struct console *co, const char *b, unsigned count)
2445{
2446 struct vc_data *vc = vc_cons[fg_console].d;
2447 unsigned char c;
Nick Pigginb0940002008-02-06 01:37:04 -08002448 static DEFINE_SPINLOCK(printing_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002449 const ushort *start;
2450 ushort cnt = 0;
2451 ushort myx;
2452
2453 /* console busy or not yet initialized */
Nick Pigginb0940002008-02-06 01:37:04 -08002454 if (!printable)
2455 return;
2456 if (!spin_trylock(&printing_lock))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002457 return;
2458
2459 if (kmsg_redirect && vc_cons_allocated(kmsg_redirect - 1))
2460 vc = vc_cons[kmsg_redirect - 1].d;
2461
2462 /* read `x' only after setting currcons properly (otherwise
2463 the `x' macro will read the x of the foreground console). */
2464 myx = vc->vc_x;
2465
2466 if (!vc_cons_allocated(fg_console)) {
2467 /* impossible */
2468 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2469 goto quit;
2470 }
2471
2472 if (vc->vc_mode != KD_TEXT)
2473 goto quit;
2474
2475 /* undraw cursor first */
2476 if (IS_FG(vc))
2477 hide_cursor(vc);
2478
2479 start = (ushort *)vc->vc_pos;
2480
2481 /* Contrived structure to try to emulate original need_wrap behaviour
2482 * Problems caused when we have need_wrap set on '\n' character */
2483 while (count--) {
2484 c = *b++;
2485 if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) {
2486 if (cnt > 0) {
2487 if (CON_IS_VISIBLE(vc))
2488 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2489 vc->vc_x += cnt;
2490 if (vc->vc_need_wrap)
2491 vc->vc_x--;
2492 cnt = 0;
2493 }
2494 if (c == 8) { /* backspace */
2495 bs(vc);
2496 start = (ushort *)vc->vc_pos;
2497 myx = vc->vc_x;
2498 continue;
2499 }
2500 if (c != 13)
2501 lf(vc);
2502 cr(vc);
2503 start = (ushort *)vc->vc_pos;
2504 myx = vc->vc_x;
2505 if (c == 10 || c == 13)
2506 continue;
2507 }
2508 scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos);
Samuel Thibaultb293d752007-10-18 23:39:17 -07002509 notify_write(vc, c);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002510 cnt++;
2511 if (myx == vc->vc_cols - 1) {
2512 vc->vc_need_wrap = 1;
2513 continue;
2514 }
2515 vc->vc_pos += 2;
2516 myx++;
2517 }
2518 if (cnt > 0) {
2519 if (CON_IS_VISIBLE(vc))
2520 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2521 vc->vc_x += cnt;
2522 if (vc->vc_x == vc->vc_cols) {
2523 vc->vc_x--;
2524 vc->vc_need_wrap = 1;
2525 }
2526 }
2527 set_cursor(vc);
Samuel Thibaultb293d752007-10-18 23:39:17 -07002528 notify_update(vc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002529
2530quit:
Nick Pigginb0940002008-02-06 01:37:04 -08002531 spin_unlock(&printing_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002532}
2533
2534static struct tty_driver *vt_console_device(struct console *c, int *index)
2535{
2536 *index = c->index ? c->index-1 : fg_console;
2537 return console_driver;
2538}
2539
2540static struct console vt_console_driver = {
2541 .name = "tty",
2542 .write = vt_console_print,
2543 .device = vt_console_device,
2544 .unblank = unblank_screen,
2545 .flags = CON_PRINTBUFFER,
2546 .index = -1,
2547};
2548#endif
2549
2550/*
2551 * Handling of Linux-specific VC ioctls
2552 */
2553
2554/*
2555 * Generally a bit racy with respect to console_sem().
2556 *
2557 * There are some functions which don't need it.
2558 *
2559 * There are some functions which can sleep for arbitrary periods
2560 * (paste_selection) but we don't need the lock there anyway.
2561 *
2562 * set_selection has locking, and definitely needs it
2563 */
2564
2565int tioclinux(struct tty_struct *tty, unsigned long arg)
2566{
2567 char type, data;
2568 char __user *p = (char __user *)arg;
2569 int lines;
2570 int ret;
2571
Linus Torvalds1da177e2005-04-16 15:20:36 -07002572 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN))
2573 return -EPERM;
2574 if (get_user(type, p))
2575 return -EFAULT;
2576 ret = 0;
Alan Cox04f378b2008-04-30 00:53:29 -07002577
2578 lock_kernel();
2579
Linus Torvalds1da177e2005-04-16 15:20:36 -07002580 switch (type)
2581 {
2582 case TIOCL_SETSEL:
2583 acquire_console_sem();
2584 ret = set_selection((struct tiocl_selection __user *)(p+1), tty);
2585 release_console_sem();
2586 break;
2587 case TIOCL_PASTESEL:
2588 ret = paste_selection(tty);
2589 break;
2590 case TIOCL_UNBLANKSCREEN:
Stephane Doyon2d237c62005-09-06 15:17:31 -07002591 acquire_console_sem();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002592 unblank_screen();
Stephane Doyon2d237c62005-09-06 15:17:31 -07002593 release_console_sem();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002594 break;
2595 case TIOCL_SELLOADLUT:
2596 ret = sel_loadlut(p);
2597 break;
2598 case TIOCL_GETSHIFTSTATE:
Alan Cox04f378b2008-04-30 00:53:29 -07002599
Linus Torvalds1da177e2005-04-16 15:20:36 -07002600 /*
2601 * Make it possible to react to Shift+Mousebutton.
2602 * Note that 'shift_state' is an undocumented
2603 * kernel-internal variable; programs not closely
2604 * related to the kernel should not use this.
2605 */
2606 data = shift_state;
2607 ret = __put_user(data, p);
2608 break;
2609 case TIOCL_GETMOUSEREPORTING:
2610 data = mouse_reporting();
2611 ret = __put_user(data, p);
2612 break;
2613 case TIOCL_SETVESABLANK:
Yoichi Yuasa403aac92006-12-06 20:38:38 -08002614 ret = set_vesa_blanking(p);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002615 break;
Rafael J. Wysocki0ca07732006-03-31 02:30:58 -08002616 case TIOCL_GETKMSGREDIRECT:
2617 data = kmsg_redirect;
2618 ret = __put_user(data, p);
2619 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002620 case TIOCL_SETKMSGREDIRECT:
2621 if (!capable(CAP_SYS_ADMIN)) {
2622 ret = -EPERM;
2623 } else {
2624 if (get_user(data, p+1))
2625 ret = -EFAULT;
2626 else
2627 kmsg_redirect = data;
2628 }
2629 break;
2630 case TIOCL_GETFGCONSOLE:
2631 ret = fg_console;
2632 break;
2633 case TIOCL_SCROLLCONSOLE:
2634 if (get_user(lines, (s32 __user *)(p+4))) {
2635 ret = -EFAULT;
2636 } else {
2637 scrollfront(vc_cons[fg_console].d, lines);
2638 ret = 0;
2639 }
2640 break;
2641 case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
Stephane Doyon2d237c62005-09-06 15:17:31 -07002642 acquire_console_sem();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002643 ignore_poke = 1;
2644 do_blank_screen(0);
Stephane Doyon2d237c62005-09-06 15:17:31 -07002645 release_console_sem();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002646 break;
2647 case TIOCL_BLANKEDSCREEN:
2648 ret = console_blanked;
2649 break;
2650 default:
2651 ret = -EINVAL;
2652 break;
2653 }
Alan Cox04f378b2008-04-30 00:53:29 -07002654 unlock_kernel();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002655 return ret;
2656}
2657
2658/*
2659 * /dev/ttyN handling
2660 */
2661
2662static int con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2663{
2664 int retval;
2665
2666 retval = do_con_write(tty, buf, count);
2667 con_flush_chars(tty);
2668
2669 return retval;
2670}
2671
Alan Cox5d19f542008-04-30 00:54:08 -07002672static int con_put_char(struct tty_struct *tty, unsigned char ch)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002673{
2674 if (in_interrupt())
Alan Cox5d19f542008-04-30 00:54:08 -07002675 return 0; /* n_r3964 calls put_char() from interrupt context */
2676 return do_con_write(tty, &ch, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002677}
2678
2679static int con_write_room(struct tty_struct *tty)
2680{
2681 if (tty->stopped)
2682 return 0;
Joe Petersona88a69c2009-01-02 13:40:53 +00002683 return 32768; /* No limit, really; we're not buffering */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002684}
2685
2686static int con_chars_in_buffer(struct tty_struct *tty)
2687{
2688 return 0; /* we're not buffering */
2689}
2690
2691/*
2692 * con_throttle and con_unthrottle are only used for
2693 * paste_selection(), which has to stuff in a large number of
2694 * characters...
2695 */
2696static void con_throttle(struct tty_struct *tty)
2697{
2698}
2699
2700static void con_unthrottle(struct tty_struct *tty)
2701{
2702 struct vc_data *vc = tty->driver_data;
2703
2704 wake_up_interruptible(&vc->paste_wait);
2705}
2706
2707/*
2708 * Turn the Scroll-Lock LED on when the tty is stopped
2709 */
2710static void con_stop(struct tty_struct *tty)
2711{
2712 int console_num;
2713 if (!tty)
2714 return;
2715 console_num = tty->index;
2716 if (!vc_cons_allocated(console_num))
2717 return;
2718 set_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2719 set_leds();
2720}
2721
2722/*
2723 * Turn the Scroll-Lock LED off when the console is started
2724 */
2725static void con_start(struct tty_struct *tty)
2726{
2727 int console_num;
2728 if (!tty)
2729 return;
2730 console_num = tty->index;
2731 if (!vc_cons_allocated(console_num))
2732 return;
2733 clr_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2734 set_leds();
2735}
2736
2737static void con_flush_chars(struct tty_struct *tty)
2738{
2739 struct vc_data *vc;
2740
2741 if (in_interrupt()) /* from flush_to_ldisc */
2742 return;
2743
2744 /* if we race with con_close(), vt may be null */
2745 acquire_console_sem();
2746 vc = tty->driver_data;
2747 if (vc)
2748 set_cursor(vc);
2749 release_console_sem();
2750}
2751
2752/*
2753 * Allocate the console screen memory.
2754 */
2755static int con_open(struct tty_struct *tty, struct file *filp)
2756{
2757 unsigned int currcons = tty->index;
2758 int ret = 0;
2759
2760 acquire_console_sem();
Paul Mackerrasf7866482005-08-28 09:40:01 +10002761 if (tty->driver_data == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002762 ret = vc_allocate(currcons);
2763 if (ret == 0) {
2764 struct vc_data *vc = vc_cons[currcons].d;
Alan Coxfeebed62008-10-13 10:41:30 +01002765
2766 /* Still being freed */
2767 if (vc->vc_tty) {
2768 release_console_sem();
2769 return -ERESTARTSYS;
2770 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002771 tty->driver_data = vc;
2772 vc->vc_tty = tty;
2773
2774 if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
2775 tty->winsize.ws_row = vc_cons[currcons].d->vc_rows;
2776 tty->winsize.ws_col = vc_cons[currcons].d->vc_cols;
2777 }
Samuel Thibaultc1236d32008-05-06 20:42:37 -07002778 if (vc->vc_utf)
2779 tty->termios->c_iflag |= IUTF8;
2780 else
2781 tty->termios->c_iflag &= ~IUTF8;
Jiri Slabye0426e62008-07-23 21:29:58 -07002782 release_console_sem();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002783 return ret;
2784 }
2785 }
2786 release_console_sem();
2787 return ret;
2788}
2789
Linus Torvalds1da177e2005-04-16 15:20:36 -07002790static void con_close(struct tty_struct *tty, struct file *filp)
2791{
Alan Coxfeebed62008-10-13 10:41:30 +01002792 /* Nothing to do - we defer to shutdown */
2793}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002794
Alan Coxfeebed62008-10-13 10:41:30 +01002795static void con_shutdown(struct tty_struct *tty)
2796{
2797 struct vc_data *vc = tty->driver_data;
2798 BUG_ON(vc == NULL);
2799 acquire_console_sem();
2800 vc->vc_tty = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002801 release_console_sem();
Alan Coxfeebed62008-10-13 10:41:30 +01002802 tty_shutdown(tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002803}
2804
Jan Engelhardtfa6ce9a2007-05-08 00:38:04 -07002805static int default_italic_color = 2; // green (ASCII)
2806static int default_underline_color = 3; // cyan (ASCII)
2807module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR);
2808module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR);
2809
Linus Torvalds1da177e2005-04-16 15:20:36 -07002810static void vc_init(struct vc_data *vc, unsigned int rows,
2811 unsigned int cols, int do_clear)
2812{
2813 int j, k ;
2814
2815 vc->vc_cols = cols;
2816 vc->vc_rows = rows;
2817 vc->vc_size_row = cols << 1;
2818 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
2819
2820 set_origin(vc);
2821 vc->vc_pos = vc->vc_origin;
2822 reset_vc(vc);
2823 for (j=k=0; j<16; j++) {
2824 vc->vc_palette[k++] = default_red[j] ;
2825 vc->vc_palette[k++] = default_grn[j] ;
2826 vc->vc_palette[k++] = default_blu[j] ;
2827 }
2828 vc->vc_def_color = 0x07; /* white */
Jan Engelhardtfa6ce9a2007-05-08 00:38:04 -07002829 vc->vc_ulcolor = default_underline_color;
2830 vc->vc_itcolor = default_italic_color;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002831 vc->vc_halfcolor = 0x08; /* grey */
2832 init_waitqueue_head(&vc->paste_wait);
2833 reset_terminal(vc, do_clear);
2834}
2835
2836/*
2837 * This routine initializes console interrupts, and does nothing
2838 * else. If you want the screen to clear, call tty_write with
2839 * the appropriate escape-sequence.
2840 */
2841
2842static int __init con_init(void)
2843{
2844 const char *display_desc = NULL;
2845 struct vc_data *vc;
Antonino A. Daplas3e795de2006-06-26 00:27:08 -07002846 unsigned int currcons = 0, i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002847
2848 acquire_console_sem();
2849
2850 if (conswitchp)
2851 display_desc = conswitchp->con_startup();
2852 if (!display_desc) {
2853 fg_console = 0;
2854 release_console_sem();
2855 return 0;
2856 }
2857
Antonino A. Daplas3e795de2006-06-26 00:27:08 -07002858 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2859 struct con_driver *con_driver = &registered_con_driver[i];
2860
2861 if (con_driver->con == NULL) {
2862 con_driver->con = conswitchp;
2863 con_driver->desc = display_desc;
2864 con_driver->flag = CON_DRIVER_FLAG_INIT;
2865 con_driver->first = 0;
2866 con_driver->last = MAX_NR_CONSOLES - 1;
2867 break;
2868 }
2869 }
2870
2871 for (i = 0; i < MAX_NR_CONSOLES; i++)
2872 con_driver_map[i] = conswitchp;
2873
Linus Torvalds1da177e2005-04-16 15:20:36 -07002874 if (blankinterval) {
2875 blank_state = blank_normal_wait;
Daniel Mackf324edc2009-06-16 15:33:52 -07002876 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002877 }
2878
Linus Torvalds1da177e2005-04-16 15:20:36 -07002879 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) {
Pekka Enberga5f4f522009-06-10 23:53:37 +03002880 vc_cons[currcons].d = vc = kzalloc(sizeof(struct vc_data), GFP_NOWAIT);
Eric W. Biederman7f1f86a2007-02-13 14:38:58 -07002881 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002882 visual_init(vc, currcons, 1);
Pekka Enberga5f4f522009-06-10 23:53:37 +03002883 vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_NOWAIT);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002884 vc->vc_kmalloced = 0;
2885 vc_init(vc, vc->vc_rows, vc->vc_cols,
2886 currcons || !vc->vc_sw->con_save_screen);
2887 }
2888 currcons = fg_console = 0;
2889 master_display_fg = vc = vc_cons[currcons].d;
2890 set_origin(vc);
2891 save_screen(vc);
2892 gotoxy(vc, vc->vc_x, vc->vc_y);
2893 csi_J(vc, 0);
2894 update_screen(vc);
2895 printk("Console: %s %s %dx%d",
2896 vc->vc_can_do_color ? "colour" : "mono",
2897 display_desc, vc->vc_cols, vc->vc_rows);
2898 printable = 1;
2899 printk("\n");
2900
2901 release_console_sem();
2902
2903#ifdef CONFIG_VT_CONSOLE
2904 register_console(&vt_console_driver);
2905#endif
2906 return 0;
2907}
2908console_initcall(con_init);
2909
Jeff Dikeb68e31d2006-10-02 02:17:18 -07002910static const struct tty_operations con_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002911 .open = con_open,
2912 .close = con_close,
2913 .write = con_write,
2914 .write_room = con_write_room,
2915 .put_char = con_put_char,
2916 .flush_chars = con_flush_chars,
2917 .chars_in_buffer = con_chars_in_buffer,
2918 .ioctl = vt_ioctl,
2919 .stop = con_stop,
2920 .start = con_start,
2921 .throttle = con_throttle,
2922 .unthrottle = con_unthrottle,
Alan Cox8c9a9dd2008-08-15 10:39:38 +01002923 .resize = vt_resize,
Alan Coxfeebed62008-10-13 10:41:30 +01002924 .shutdown = con_shutdown
Linus Torvalds1da177e2005-04-16 15:20:36 -07002925};
2926
Alan Coxd81ed102008-10-13 10:41:42 +01002927static struct cdev vc0_cdev;
2928
2929int __init vty_init(const struct file_operations *console_fops)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002930{
Alan Coxd81ed102008-10-13 10:41:42 +01002931 cdev_init(&vc0_cdev, console_fops);
2932 if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) ||
2933 register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0)
2934 panic("Couldn't register /dev/tty0 driver\n");
2935 device_create(tty_class, NULL, MKDEV(TTY_MAJOR, 0), NULL, "tty0");
2936
Linus Torvalds1da177e2005-04-16 15:20:36 -07002937 vcs_init();
2938
2939 console_driver = alloc_tty_driver(MAX_NR_CONSOLES);
2940 if (!console_driver)
2941 panic("Couldn't allocate console driver\n");
2942 console_driver->owner = THIS_MODULE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002943 console_driver->name = "tty";
2944 console_driver->name_base = 1;
2945 console_driver->major = TTY_MAJOR;
2946 console_driver->minor_start = 1;
2947 console_driver->type = TTY_DRIVER_TYPE_CONSOLE;
2948 console_driver->init_termios = tty_std_termios;
Samuel Thibaultc1236d32008-05-06 20:42:37 -07002949 if (default_utf8)
2950 console_driver->init_termios.c_iflag |= IUTF8;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002951 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS;
2952 tty_set_operations(console_driver, &con_ops);
2953 if (tty_register_driver(console_driver))
2954 panic("Couldn't register console driver\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002955 kbd_init();
2956 console_map_init();
2957#ifdef CONFIG_PROM_CONSOLE
2958 prom_con_init();
2959#endif
2960#ifdef CONFIG_MDA_CONSOLE
2961 mda_console_init();
2962#endif
2963 return 0;
2964}
2965
2966#ifndef VT_SINGLE_DRIVER
Antonino A. Daplas6db40632006-06-26 00:27:12 -07002967#include <linux/device.h>
2968
2969static struct class *vtconsole_class;
2970
Jesse Barnesb7269dd2007-07-17 04:05:34 -07002971static int bind_con_driver(const struct consw *csw, int first, int last,
2972 int deflt)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002973{
Antonino A. Daplas3e795de2006-06-26 00:27:08 -07002974 struct module *owner = csw->owner;
2975 const char *desc = NULL;
2976 struct con_driver *con_driver;
2977 int i, j = -1, k = -1, retval = -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002978
Linus Torvalds1da177e2005-04-16 15:20:36 -07002979 if (!try_module_get(owner))
2980 return -ENODEV;
2981
Antonino A. Daplas1c8ce272006-06-26 00:27:03 -07002982 acquire_console_sem();
Antonino A. Daplas1c8ce272006-06-26 00:27:03 -07002983
Antonino A. Daplas3e795de2006-06-26 00:27:08 -07002984 /* check if driver is registered */
2985 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2986 con_driver = &registered_con_driver[i];
2987
2988 if (con_driver->con == csw) {
2989 desc = con_driver->desc;
2990 retval = 0;
2991 break;
2992 }
2993 }
2994
2995 if (retval)
2996 goto err;
2997
2998 if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) {
2999 csw->con_startup();
3000 con_driver->flag |= CON_DRIVER_FLAG_INIT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003001 }
Antonino A. Daplas1c8ce272006-06-26 00:27:03 -07003002
Linus Torvalds1da177e2005-04-16 15:20:36 -07003003 if (deflt) {
3004 if (conswitchp)
3005 module_put(conswitchp->owner);
Antonino A. Daplas1c8ce272006-06-26 00:27:03 -07003006
Linus Torvalds1da177e2005-04-16 15:20:36 -07003007 __module_get(owner);
3008 conswitchp = csw;
3009 }
3010
Antonino A. Daplas3e795de2006-06-26 00:27:08 -07003011 first = max(first, con_driver->first);
3012 last = min(last, con_driver->last);
3013
Linus Torvalds1da177e2005-04-16 15:20:36 -07003014 for (i = first; i <= last; i++) {
3015 int old_was_color;
3016 struct vc_data *vc = vc_cons[i].d;
3017
3018 if (con_driver_map[i])
3019 module_put(con_driver_map[i]->owner);
3020 __module_get(owner);
3021 con_driver_map[i] = csw;
3022
3023 if (!vc || !vc->vc_sw)
3024 continue;
3025
3026 j = i;
Antonino A. Daplas1c8ce272006-06-26 00:27:03 -07003027
David Hollister4ee1acc2006-06-26 00:26:41 -07003028 if (CON_IS_VISIBLE(vc)) {
3029 k = i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003030 save_screen(vc);
David Hollister4ee1acc2006-06-26 00:26:41 -07003031 }
3032
Linus Torvalds1da177e2005-04-16 15:20:36 -07003033 old_was_color = vc->vc_can_do_color;
3034 vc->vc_sw->con_deinit(vc);
3035 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003036 visual_init(vc, i, 0);
Antonino A. Daplas1c8ce272006-06-26 00:27:03 -07003037 set_origin(vc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003038 update_attr(vc);
3039
3040 /* If the console changed between mono <-> color, then
3041 * the attributes in the screenbuf will be wrong. The
3042 * following resets all attributes to something sane.
3043 */
3044 if (old_was_color != vc->vc_can_do_color)
3045 clear_buffer_attributes(vc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003046 }
David Hollister4ee1acc2006-06-26 00:26:41 -07003047
Linus Torvalds1da177e2005-04-16 15:20:36 -07003048 printk("Console: switching ");
3049 if (!deflt)
3050 printk("consoles %d-%d ", first+1, last+1);
David Hollister4ee1acc2006-06-26 00:26:41 -07003051 if (j >= 0) {
3052 struct vc_data *vc = vc_cons[j].d;
3053
Linus Torvalds1da177e2005-04-16 15:20:36 -07003054 printk("to %s %s %dx%d\n",
David Hollister4ee1acc2006-06-26 00:26:41 -07003055 vc->vc_can_do_color ? "colour" : "mono",
3056 desc, vc->vc_cols, vc->vc_rows);
3057
3058 if (k >= 0) {
3059 vc = vc_cons[k].d;
3060 update_screen(vc);
3061 }
3062 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -07003063 printk("to %s\n", desc);
3064
Antonino A. Daplas3e795de2006-06-26 00:27:08 -07003065 retval = 0;
3066err:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003067 release_console_sem();
Linus Torvalds1da177e2005-04-16 15:20:36 -07003068 module_put(owner);
Antonino A. Daplas3e795de2006-06-26 00:27:08 -07003069 return retval;
3070};
Linus Torvalds1da177e2005-04-16 15:20:36 -07003071
Antonino A. Daplas13ae6642006-06-26 00:27:12 -07003072#ifdef CONFIG_VT_HW_CONSOLE_BINDING
3073static int con_is_graphics(const struct consw *csw, int first, int last)
3074{
3075 int i, retval = 0;
3076
3077 for (i = first; i <= last; i++) {
3078 struct vc_data *vc = vc_cons[i].d;
3079
3080 if (vc && vc->vc_mode == KD_GRAPHICS) {
3081 retval = 1;
3082 break;
3083 }
3084 }
3085
3086 return retval;
3087}
3088
Jesse Barnesb7269dd2007-07-17 04:05:34 -07003089/**
3090 * unbind_con_driver - unbind a console driver
3091 * @csw: pointer to console driver to unregister
3092 * @first: first in range of consoles that @csw should be unbound from
3093 * @last: last in range of consoles that @csw should be unbound from
3094 * @deflt: should next bound console driver be default after @csw is unbound?
3095 *
3096 * To unbind a driver from all possible consoles, pass 0 as @first and
3097 * %MAX_NR_CONSOLES as @last.
3098 *
3099 * @deflt controls whether the console that ends up replacing @csw should be
3100 * the default console.
3101 *
3102 * RETURNS:
3103 * -ENODEV if @csw isn't a registered console driver or can't be unregistered
3104 * or 0 on success.
3105 */
Antonino A. Daplas623e71b2007-07-17 04:05:28 -07003106int unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003107{
Antonino A. Daplas3e795de2006-06-26 00:27:08 -07003108 struct module *owner = csw->owner;
3109 const struct consw *defcsw = NULL;
3110 struct con_driver *con_driver = NULL, *con_back = NULL;
3111 int i, retval = -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003112
Antonino A. Daplas3e795de2006-06-26 00:27:08 -07003113 if (!try_module_get(owner))
3114 return -ENODEV;
3115
3116 acquire_console_sem();
3117
3118 /* check if driver is registered and if it is unbindable */
3119 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3120 con_driver = &registered_con_driver[i];
3121
3122 if (con_driver->con == csw &&
Antonino A. Daplas6db40632006-06-26 00:27:12 -07003123 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
Antonino A. Daplas3e795de2006-06-26 00:27:08 -07003124 retval = 0;
3125 break;
3126 }
3127 }
3128
3129 if (retval) {
3130 release_console_sem();
3131 goto err;
3132 }
3133
Antonino A. Daplas6db40632006-06-26 00:27:12 -07003134 retval = -ENODEV;
3135
Antonino A. Daplas3e795de2006-06-26 00:27:08 -07003136 /* check if backup driver exists */
3137 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3138 con_back = &registered_con_driver[i];
3139
3140 if (con_back->con &&
Antonino A. Daplas6db40632006-06-26 00:27:12 -07003141 !(con_back->flag & CON_DRIVER_FLAG_MODULE)) {
Antonino A. Daplas3e795de2006-06-26 00:27:08 -07003142 defcsw = con_back->con;
3143 retval = 0;
3144 break;
3145 }
3146 }
3147
3148 if (retval) {
3149 release_console_sem();
3150 goto err;
3151 }
3152
3153 if (!con_is_bound(csw)) {
3154 release_console_sem();
3155 goto err;
3156 }
3157
3158 first = max(first, con_driver->first);
3159 last = min(last, con_driver->last);
3160
3161 for (i = first; i <= last; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003162 if (con_driver_map[i] == csw) {
3163 module_put(csw->owner);
3164 con_driver_map[i] = NULL;
3165 }
Antonino A. Daplas1c8ce272006-06-26 00:27:03 -07003166 }
Antonino A. Daplas3e795de2006-06-26 00:27:08 -07003167
3168 if (!con_is_bound(defcsw)) {
Antonino A. Daplas6db40632006-06-26 00:27:12 -07003169 const struct consw *defconsw = conswitchp;
3170
Antonino A. Daplas3e795de2006-06-26 00:27:08 -07003171 defcsw->con_startup();
3172 con_back->flag |= CON_DRIVER_FLAG_INIT;
Antonino A. Daplas6db40632006-06-26 00:27:12 -07003173 /*
3174 * vgacon may change the default driver to point
3175 * to dummycon, we restore it here...
3176 */
3177 conswitchp = defconsw;
Antonino A. Daplas3e795de2006-06-26 00:27:08 -07003178 }
3179
3180 if (!con_is_bound(csw))
3181 con_driver->flag &= ~CON_DRIVER_FLAG_INIT;
3182
3183 release_console_sem();
Antonino A. Daplas6db40632006-06-26 00:27:12 -07003184 /* ignore return value, binding should not fail */
3185 bind_con_driver(defcsw, first, last, deflt);
Antonino A. Daplas3e795de2006-06-26 00:27:08 -07003186err:
3187 module_put(owner);
3188 return retval;
3189
3190}
Antonino A. Daplas623e71b2007-07-17 04:05:28 -07003191EXPORT_SYMBOL(unbind_con_driver);
Antonino A. Daplas3e795de2006-06-26 00:27:08 -07003192
Antonino A. Daplas6db40632006-06-26 00:27:12 -07003193static int vt_bind(struct con_driver *con)
3194{
3195 const struct consw *defcsw = NULL, *csw = NULL;
3196 int i, more = 1, first = -1, last = -1, deflt = 0;
3197
3198 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3199 con_is_graphics(con->con, con->first, con->last))
3200 goto err;
3201
3202 csw = con->con;
3203
3204 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3205 struct con_driver *con = &registered_con_driver[i];
3206
3207 if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) {
3208 defcsw = con->con;
3209 break;
3210 }
3211 }
3212
3213 if (!defcsw)
3214 goto err;
3215
3216 while (more) {
3217 more = 0;
3218
3219 for (i = con->first; i <= con->last; i++) {
3220 if (con_driver_map[i] == defcsw) {
3221 if (first == -1)
3222 first = i;
3223 last = i;
3224 more = 1;
3225 } else if (first != -1)
3226 break;
3227 }
3228
3229 if (first == 0 && last == MAX_NR_CONSOLES -1)
3230 deflt = 1;
3231
3232 if (first != -1)
3233 bind_con_driver(csw, first, last, deflt);
3234
3235 first = -1;
3236 last = -1;
3237 deflt = 0;
3238 }
3239
3240err:
3241 return 0;
3242}
3243
3244static int vt_unbind(struct con_driver *con)
3245{
3246 const struct consw *csw = NULL;
3247 int i, more = 1, first = -1, last = -1, deflt = 0;
3248
3249 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3250 con_is_graphics(con->con, con->first, con->last))
3251 goto err;
3252
3253 csw = con->con;
3254
3255 while (more) {
3256 more = 0;
3257
3258 for (i = con->first; i <= con->last; i++) {
3259 if (con_driver_map[i] == csw) {
3260 if (first == -1)
3261 first = i;
3262 last = i;
3263 more = 1;
3264 } else if (first != -1)
3265 break;
3266 }
3267
3268 if (first == 0 && last == MAX_NR_CONSOLES -1)
3269 deflt = 1;
3270
3271 if (first != -1)
3272 unbind_con_driver(csw, first, last, deflt);
3273
3274 first = -1;
3275 last = -1;
3276 deflt = 0;
3277 }
3278
3279err:
3280 return 0;
3281}
Antonino A. Daplas13ae6642006-06-26 00:27:12 -07003282#else
3283static inline int vt_bind(struct con_driver *con)
3284{
3285 return 0;
3286}
3287static inline int vt_unbind(struct con_driver *con)
3288{
3289 return 0;
3290}
3291#endif /* CONFIG_VT_HW_CONSOLE_BINDING */
Antonino A. Daplas6db40632006-06-26 00:27:12 -07003292
Greg Kroah-Hartman805952a2006-08-07 22:19:37 -07003293static ssize_t store_bind(struct device *dev, struct device_attribute *attr,
Antonino A. Daplas6db40632006-06-26 00:27:12 -07003294 const char *buf, size_t count)
3295{
Greg Kroah-Hartman805952a2006-08-07 22:19:37 -07003296 struct con_driver *con = dev_get_drvdata(dev);
Antonino A. Daplas6db40632006-06-26 00:27:12 -07003297 int bind = simple_strtoul(buf, NULL, 0);
3298
3299 if (bind)
3300 vt_bind(con);
3301 else
3302 vt_unbind(con);
3303
3304 return count;
3305}
3306
Greg Kroah-Hartman805952a2006-08-07 22:19:37 -07003307static ssize_t show_bind(struct device *dev, struct device_attribute *attr,
3308 char *buf)
Antonino A. Daplas6db40632006-06-26 00:27:12 -07003309{
Greg Kroah-Hartman805952a2006-08-07 22:19:37 -07003310 struct con_driver *con = dev_get_drvdata(dev);
Antonino A. Daplas6db40632006-06-26 00:27:12 -07003311 int bind = con_is_bound(con->con);
3312
3313 return snprintf(buf, PAGE_SIZE, "%i\n", bind);
3314}
3315
Greg Kroah-Hartman805952a2006-08-07 22:19:37 -07003316static ssize_t show_name(struct device *dev, struct device_attribute *attr,
3317 char *buf)
Antonino A. Daplas6db40632006-06-26 00:27:12 -07003318{
Greg Kroah-Hartman805952a2006-08-07 22:19:37 -07003319 struct con_driver *con = dev_get_drvdata(dev);
Antonino A. Daplas6db40632006-06-26 00:27:12 -07003320
3321 return snprintf(buf, PAGE_SIZE, "%s %s\n",
3322 (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)",
3323 con->desc);
3324
3325}
3326
Greg Kroah-Hartman805952a2006-08-07 22:19:37 -07003327static struct device_attribute device_attrs[] = {
Antonino A. Daplas6db40632006-06-26 00:27:12 -07003328 __ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind),
3329 __ATTR(name, S_IRUGO, show_name, NULL),
3330};
3331
Greg Kroah-Hartman805952a2006-08-07 22:19:37 -07003332static int vtconsole_init_device(struct con_driver *con)
Antonino A. Daplas6db40632006-06-26 00:27:12 -07003333{
3334 int i;
Antonino A. Daplas928e9642006-10-03 01:14:49 -07003335 int error = 0;
Antonino A. Daplas6db40632006-06-26 00:27:12 -07003336
Antonino A. Daplas928e9642006-10-03 01:14:49 -07003337 con->flag |= CON_DRIVER_FLAG_ATTR;
Greg Kroah-Hartman805952a2006-08-07 22:19:37 -07003338 dev_set_drvdata(con->dev, con);
3339 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3340 error = device_create_file(con->dev, &device_attrs[i]);
Antonino A. Daplas928e9642006-10-03 01:14:49 -07003341 if (error)
3342 break;
3343 }
Antonino A. Daplas6db40632006-06-26 00:27:12 -07003344
Antonino A. Daplas928e9642006-10-03 01:14:49 -07003345 if (error) {
3346 while (--i >= 0)
Greg Kroah-Hartman805952a2006-08-07 22:19:37 -07003347 device_remove_file(con->dev, &device_attrs[i]);
Antonino A. Daplas928e9642006-10-03 01:14:49 -07003348 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3349 }
3350
3351 return error;
Antonino A. Daplas6db40632006-06-26 00:27:12 -07003352}
3353
Greg Kroah-Hartman805952a2006-08-07 22:19:37 -07003354static void vtconsole_deinit_device(struct con_driver *con)
Antonino A. Daplas6db40632006-06-26 00:27:12 -07003355{
3356 int i;
3357
Antonino A. Daplas928e9642006-10-03 01:14:49 -07003358 if (con->flag & CON_DRIVER_FLAG_ATTR) {
Greg Kroah-Hartman805952a2006-08-07 22:19:37 -07003359 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3360 device_remove_file(con->dev, &device_attrs[i]);
Antonino A. Daplas928e9642006-10-03 01:14:49 -07003361 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3362 }
Antonino A. Daplas6db40632006-06-26 00:27:12 -07003363}
3364
Antonino A. Daplas3e795de2006-06-26 00:27:08 -07003365/**
3366 * con_is_bound - checks if driver is bound to the console
3367 * @csw: console driver
3368 *
3369 * RETURNS: zero if unbound, nonzero if bound
3370 *
3371 * Drivers can call this and if zero, they should release
3372 * all resources allocated on con_startup()
3373 */
3374int con_is_bound(const struct consw *csw)
3375{
3376 int i, bound = 0;
3377
3378 for (i = 0; i < MAX_NR_CONSOLES; i++) {
3379 if (con_driver_map[i] == csw) {
3380 bound = 1;
3381 break;
3382 }
3383 }
3384
3385 return bound;
3386}
3387EXPORT_SYMBOL(con_is_bound);
3388
3389/**
3390 * register_con_driver - register console driver to console layer
3391 * @csw: console driver
3392 * @first: the first console to take over, minimum value is 0
3393 * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1
3394 *
3395 * DESCRIPTION: This function registers a console driver which can later
3396 * bind to a range of consoles specified by @first and @last. It will
3397 * also initialize the console driver by calling con_startup().
3398 */
3399int register_con_driver(const struct consw *csw, int first, int last)
3400{
3401 struct module *owner = csw->owner;
3402 struct con_driver *con_driver;
3403 const char *desc;
3404 int i, retval = 0;
3405
3406 if (!try_module_get(owner))
3407 return -ENODEV;
3408
3409 acquire_console_sem();
3410
3411 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3412 con_driver = &registered_con_driver[i];
3413
3414 /* already registered */
3415 if (con_driver->con == csw)
3416 retval = -EINVAL;
3417 }
3418
3419 if (retval)
3420 goto err;
3421
3422 desc = csw->con_startup();
3423
3424 if (!desc)
3425 goto err;
3426
3427 retval = -EINVAL;
3428
3429 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3430 con_driver = &registered_con_driver[i];
3431
3432 if (con_driver->con == NULL) {
3433 con_driver->con = csw;
3434 con_driver->desc = desc;
Antonino A. Daplas6db40632006-06-26 00:27:12 -07003435 con_driver->node = i;
3436 con_driver->flag = CON_DRIVER_FLAG_MODULE |
Antonino A. Daplas3e795de2006-06-26 00:27:08 -07003437 CON_DRIVER_FLAG_INIT;
3438 con_driver->first = first;
3439 con_driver->last = last;
3440 retval = 0;
3441 break;
3442 }
3443 }
3444
Antonino A. Daplas6db40632006-06-26 00:27:12 -07003445 if (retval)
3446 goto err;
3447
Alan Coxd81ed102008-10-13 10:41:42 +01003448 con_driver->dev = device_create(vtconsole_class, NULL,
Greg Kroah-Hartman47aa5792008-05-21 12:52:33 -07003449 MKDEV(0, con_driver->node),
3450 NULL, "vtcon%i",
3451 con_driver->node);
Antonino A. Daplas6db40632006-06-26 00:27:12 -07003452
Greg Kroah-Hartman805952a2006-08-07 22:19:37 -07003453 if (IS_ERR(con_driver->dev)) {
3454 printk(KERN_WARNING "Unable to create device for %s; "
Antonino A. Daplas6db40632006-06-26 00:27:12 -07003455 "errno = %ld\n", con_driver->desc,
Greg Kroah-Hartman805952a2006-08-07 22:19:37 -07003456 PTR_ERR(con_driver->dev));
3457 con_driver->dev = NULL;
Antonino A. Daplas6db40632006-06-26 00:27:12 -07003458 } else {
Greg Kroah-Hartman805952a2006-08-07 22:19:37 -07003459 vtconsole_init_device(con_driver);
Antonino A. Daplas6db40632006-06-26 00:27:12 -07003460 }
Antonino A. Daplas928e9642006-10-03 01:14:49 -07003461
Antonino A. Daplas3e795de2006-06-26 00:27:08 -07003462err:
3463 release_console_sem();
3464 module_put(owner);
3465 return retval;
3466}
3467EXPORT_SYMBOL(register_con_driver);
3468
3469/**
3470 * unregister_con_driver - unregister console driver from console layer
3471 * @csw: console driver
3472 *
3473 * DESCRIPTION: All drivers that registers to the console layer must
3474 * call this function upon exit, or if the console driver is in a state
3475 * where it won't be able to handle console services, such as the
3476 * framebuffer console without loaded framebuffer drivers.
3477 *
3478 * The driver must unbind first prior to unregistration.
3479 */
3480int unregister_con_driver(const struct consw *csw)
3481{
3482 int i, retval = -ENODEV;
3483
3484 acquire_console_sem();
3485
3486 /* cannot unregister a bound driver */
3487 if (con_is_bound(csw))
3488 goto err;
3489
3490 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3491 struct con_driver *con_driver = &registered_con_driver[i];
3492
3493 if (con_driver->con == csw &&
Antonino A. Daplas6db40632006-06-26 00:27:12 -07003494 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
Greg Kroah-Hartman805952a2006-08-07 22:19:37 -07003495 vtconsole_deinit_device(con_driver);
3496 device_destroy(vtconsole_class,
3497 MKDEV(0, con_driver->node));
Antonino A. Daplas3e795de2006-06-26 00:27:08 -07003498 con_driver->con = NULL;
3499 con_driver->desc = NULL;
Greg Kroah-Hartman805952a2006-08-07 22:19:37 -07003500 con_driver->dev = NULL;
Antonino A. Daplas6db40632006-06-26 00:27:12 -07003501 con_driver->node = 0;
Antonino A. Daplas3e795de2006-06-26 00:27:08 -07003502 con_driver->flag = 0;
3503 con_driver->first = 0;
3504 con_driver->last = 0;
3505 retval = 0;
3506 break;
3507 }
3508 }
Antonino A. Daplas3e795de2006-06-26 00:27:08 -07003509err:
3510 release_console_sem();
3511 return retval;
3512}
3513EXPORT_SYMBOL(unregister_con_driver);
3514
3515/*
3516 * If we support more console drivers, this function is used
3517 * when a driver wants to take over some existing consoles
3518 * and become default driver for newly opened ones.
3519 *
3520 * take_over_console is basically a register followed by unbind
3521 */
3522int take_over_console(const struct consw *csw, int first, int last, int deflt)
3523{
3524 int err;
3525
3526 err = register_con_driver(csw, first, last);
3527
3528 if (!err)
Antonino A. Daplas6db40632006-06-26 00:27:12 -07003529 bind_con_driver(csw, first, last, deflt);
Antonino A. Daplas3e795de2006-06-26 00:27:08 -07003530
3531 return err;
3532}
3533
3534/*
3535 * give_up_console is a wrapper to unregister_con_driver. It will only
3536 * work if driver is fully unbound.
3537 */
3538void give_up_console(const struct consw *csw)
3539{
3540 unregister_con_driver(csw);
3541}
3542
Antonino A. Daplas6db40632006-06-26 00:27:12 -07003543static int __init vtconsole_class_init(void)
Antonino A. Daplas3e795de2006-06-26 00:27:08 -07003544{
Antonino A. Daplas6db40632006-06-26 00:27:12 -07003545 int i;
Antonino A. Daplas3e795de2006-06-26 00:27:08 -07003546
Antonino A. Daplas6db40632006-06-26 00:27:12 -07003547 vtconsole_class = class_create(THIS_MODULE, "vtconsole");
3548 if (IS_ERR(vtconsole_class)) {
3549 printk(KERN_WARNING "Unable to create vt console class; "
3550 "errno = %ld\n", PTR_ERR(vtconsole_class));
3551 vtconsole_class = NULL;
3552 }
Antonino A. Daplas3e795de2006-06-26 00:27:08 -07003553
Antonino A. Daplas6db40632006-06-26 00:27:12 -07003554 /* Add system drivers to sysfs */
Antonino A. Daplas3e795de2006-06-26 00:27:08 -07003555 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3556 struct con_driver *con = &registered_con_driver[i];
3557
Greg Kroah-Hartman805952a2006-08-07 22:19:37 -07003558 if (con->con && !con->dev) {
Alan Coxd81ed102008-10-13 10:41:42 +01003559 con->dev = device_create(vtconsole_class, NULL,
Greg Kroah-Hartman47aa5792008-05-21 12:52:33 -07003560 MKDEV(0, con->node),
3561 NULL, "vtcon%i",
3562 con->node);
Antonino A. Daplas3e795de2006-06-26 00:27:08 -07003563
Greg Kroah-Hartman805952a2006-08-07 22:19:37 -07003564 if (IS_ERR(con->dev)) {
Antonino A. Daplas6db40632006-06-26 00:27:12 -07003565 printk(KERN_WARNING "Unable to create "
Greg Kroah-Hartman805952a2006-08-07 22:19:37 -07003566 "device for %s; errno = %ld\n",
3567 con->desc, PTR_ERR(con->dev));
3568 con->dev = NULL;
Antonino A. Daplas6db40632006-06-26 00:27:12 -07003569 } else {
Greg Kroah-Hartman805952a2006-08-07 22:19:37 -07003570 vtconsole_init_device(con);
Antonino A. Daplas3e795de2006-06-26 00:27:08 -07003571 }
Antonino A. Daplas3e795de2006-06-26 00:27:08 -07003572 }
3573 }
3574
Antonino A. Daplas6db40632006-06-26 00:27:12 -07003575 return 0;
Antonino A. Daplas3e795de2006-06-26 00:27:08 -07003576}
Antonino A. Daplas6db40632006-06-26 00:27:12 -07003577postcore_initcall(vtconsole_class_init);
3578
3579#endif
Antonino A. Daplas3e795de2006-06-26 00:27:08 -07003580
3581/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07003582 * Screen blanking
3583 */
3584
Yoichi Yuasa403aac92006-12-06 20:38:38 -08003585static int set_vesa_blanking(char __user *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003586{
Yoichi Yuasa403aac92006-12-06 20:38:38 -08003587 unsigned int mode;
3588
3589 if (get_user(mode, p + 1))
3590 return -EFAULT;
3591
3592 vesa_blank_mode = (mode < 4) ? mode : 0;
3593 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003594}
3595
Linus Torvalds1da177e2005-04-16 15:20:36 -07003596void do_blank_screen(int entering_gfx)
3597{
3598 struct vc_data *vc = vc_cons[fg_console].d;
3599 int i;
3600
3601 WARN_CONSOLE_UNLOCKED();
3602
3603 if (console_blanked) {
3604 if (blank_state == blank_vesa_wait) {
3605 blank_state = blank_off;
Ville Syrjalad060a322006-01-09 20:53:49 -08003606 vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003607 }
3608 return;
3609 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003610
3611 /* entering graphics mode? */
3612 if (entering_gfx) {
3613 hide_cursor(vc);
3614 save_screen(vc);
3615 vc->vc_sw->con_blank(vc, -1, 1);
3616 console_blanked = fg_console + 1;
izumib6e8f002007-07-17 04:05:49 -07003617 blank_state = blank_off;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003618 set_origin(vc);
3619 return;
3620 }
3621
izumib6e8f002007-07-17 04:05:49 -07003622 if (blank_state != blank_normal_wait)
3623 return;
3624 blank_state = blank_off;
3625
Linus Torvalds1da177e2005-04-16 15:20:36 -07003626 /* don't blank graphics */
3627 if (vc->vc_mode != KD_TEXT) {
3628 console_blanked = fg_console + 1;
3629 return;
3630 }
3631
3632 hide_cursor(vc);
3633 del_timer_sync(&console_timer);
3634 blank_timer_expired = 0;
3635
3636 save_screen(vc);
3637 /* In case we need to reset origin, blanking hook returns 1 */
Ville Syrjalad060a322006-01-09 20:53:49 -08003638 i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003639 console_blanked = fg_console + 1;
3640 if (i)
3641 set_origin(vc);
3642
3643 if (console_blank_hook && console_blank_hook(1))
3644 return;
3645
Ville Syrjalad060a322006-01-09 20:53:49 -08003646 if (vesa_off_interval && vesa_blank_mode) {
Nishanth Aravamudan030baba2005-07-15 03:56:25 -07003647 blank_state = blank_vesa_wait;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003648 mod_timer(&console_timer, jiffies + vesa_off_interval);
3649 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003650}
3651EXPORT_SYMBOL(do_blank_screen);
3652
3653/*
3654 * Called by timer as well as from vt_console_driver
3655 */
3656void do_unblank_screen(int leaving_gfx)
3657{
3658 struct vc_data *vc;
3659
3660 /* This should now always be called from a "sane" (read: can schedule)
3661 * context for the sake of the low level drivers, except in the special
3662 * case of oops_in_progress
3663 */
3664 if (!oops_in_progress)
3665 might_sleep();
3666
3667 WARN_CONSOLE_UNLOCKED();
3668
3669 ignore_poke = 0;
3670 if (!console_blanked)
3671 return;
3672 if (!vc_cons_allocated(fg_console)) {
3673 /* impossible */
3674 printk("unblank_screen: tty %d not allocated ??\n", fg_console+1);
3675 return;
3676 }
3677 vc = vc_cons[fg_console].d;
3678 if (vc->vc_mode != KD_TEXT)
3679 return; /* but leave console_blanked != 0 */
3680
3681 if (blankinterval) {
Daniel Mackf324edc2009-06-16 15:33:52 -07003682 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003683 blank_state = blank_normal_wait;
3684 }
3685
3686 console_blanked = 0;
3687 if (vc->vc_sw->con_blank(vc, 0, leaving_gfx))
3688 /* Low-level driver cannot restore -> do it ourselves */
3689 update_screen(vc);
3690 if (console_blank_hook)
3691 console_blank_hook(0);
3692 set_palette(vc);
3693 set_cursor(vc);
3694}
3695EXPORT_SYMBOL(do_unblank_screen);
3696
3697/*
3698 * This is called by the outside world to cause a forced unblank, mostly for
3699 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
3700 * call it with 1 as an argument and so force a mode restore... that may kill
3701 * X or at least garbage the screen but would also make the Oops visible...
3702 */
3703void unblank_screen(void)
3704{
3705 do_unblank_screen(0);
3706}
3707
3708/*
Ingo Molnar70522e12006-03-23 03:00:31 -08003709 * We defer the timer blanking to work queue so it can take the console mutex
Linus Torvalds1da177e2005-04-16 15:20:36 -07003710 * (console operations can still happen at irq time, but only from printk which
Ingo Molnar70522e12006-03-23 03:00:31 -08003711 * has the console mutex. Not perfect yet, but better than no locking
Linus Torvalds1da177e2005-04-16 15:20:36 -07003712 */
3713static void blank_screen_t(unsigned long dummy)
3714{
Jan Beulichcc63b1e2005-06-17 13:20:58 -07003715 if (unlikely(!keventd_up())) {
Daniel Mackf324edc2009-06-16 15:33:52 -07003716 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
Jan Beulichcc63b1e2005-06-17 13:20:58 -07003717 return;
3718 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003719 blank_timer_expired = 1;
3720 schedule_work(&console_work);
3721}
3722
3723void poke_blanked_console(void)
3724{
3725 WARN_CONSOLE_UNLOCKED();
3726
3727 /* Add this so we quickly catch whoever might call us in a non
3728 * safe context. Nowadays, unblank_screen() isn't to be called in
3729 * atomic contexts and is allowed to schedule (with the special case
3730 * of oops_in_progress, but that isn't of any concern for this
3731 * function. --BenH.
3732 */
3733 might_sleep();
3734
3735 /* This isn't perfectly race free, but a race here would be mostly harmless,
3736 * at worse, we'll do a spurrious blank and it's unlikely
3737 */
3738 del_timer(&console_timer);
3739 blank_timer_expired = 0;
3740
3741 if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS)
3742 return;
3743 if (console_blanked)
3744 unblank_screen();
3745 else if (blankinterval) {
Daniel Mackf324edc2009-06-16 15:33:52 -07003746 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003747 blank_state = blank_normal_wait;
3748 }
3749}
3750
3751/*
3752 * Palettes
3753 */
3754
3755static void set_palette(struct vc_data *vc)
3756{
3757 WARN_CONSOLE_UNLOCKED();
3758
3759 if (vc->vc_mode != KD_GRAPHICS)
3760 vc->vc_sw->con_set_palette(vc, color_table);
3761}
3762
3763static int set_get_cmap(unsigned char __user *arg, int set)
3764{
3765 int i, j, k;
3766
3767 WARN_CONSOLE_UNLOCKED();
3768
3769 for (i = 0; i < 16; i++)
3770 if (set) {
3771 get_user(default_red[i], arg++);
3772 get_user(default_grn[i], arg++);
3773 get_user(default_blu[i], arg++);
3774 } else {
3775 put_user(default_red[i], arg++);
3776 put_user(default_grn[i], arg++);
3777 put_user(default_blu[i], arg++);
3778 }
3779 if (set) {
3780 for (i = 0; i < MAX_NR_CONSOLES; i++)
3781 if (vc_cons_allocated(i)) {
3782 for (j = k = 0; j < 16; j++) {
3783 vc_cons[i].d->vc_palette[k++] = default_red[j];
3784 vc_cons[i].d->vc_palette[k++] = default_grn[j];
3785 vc_cons[i].d->vc_palette[k++] = default_blu[j];
3786 }
3787 set_palette(vc_cons[i].d);
3788 }
3789 }
3790 return 0;
3791}
3792
3793/*
3794 * Load palette into the DAC registers. arg points to a colour
3795 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
3796 */
3797
3798int con_set_cmap(unsigned char __user *arg)
3799{
3800 int rc;
3801
3802 acquire_console_sem();
3803 rc = set_get_cmap (arg,1);
3804 release_console_sem();
3805
3806 return rc;
3807}
3808
3809int con_get_cmap(unsigned char __user *arg)
3810{
3811 int rc;
3812
3813 acquire_console_sem();
3814 rc = set_get_cmap (arg,0);
3815 release_console_sem();
3816
3817 return rc;
3818}
3819
3820void reset_palette(struct vc_data *vc)
3821{
3822 int j, k;
3823 for (j=k=0; j<16; j++) {
3824 vc->vc_palette[k++] = default_red[j];
3825 vc->vc_palette[k++] = default_grn[j];
3826 vc->vc_palette[k++] = default_blu[j];
3827 }
3828 set_palette(vc);
3829}
3830
3831/*
3832 * Font switching
3833 *
3834 * Currently we only support fonts up to 32 pixels wide, at a maximum height
3835 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
3836 * depending on width) reserved for each character which is kinda wasty, but
3837 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
3838 * is upto the actual low-level console-driver convert data into its favorite
3839 * format (maybe we should add a `fontoffset' field to the `display'
3840 * structure so we won't have to convert the fontdata all the time.
3841 * /Jes
3842 */
3843
3844#define max_font_size 65536
3845
3846static int con_font_get(struct vc_data *vc, struct console_font_op *op)
3847{
3848 struct console_font font;
3849 int rc = -EINVAL;
3850 int c;
3851
3852 if (vc->vc_mode != KD_TEXT)
3853 return -EINVAL;
3854
3855 if (op->data) {
3856 font.data = kmalloc(max_font_size, GFP_KERNEL);
3857 if (!font.data)
3858 return -ENOMEM;
3859 } else
3860 font.data = NULL;
3861
3862 acquire_console_sem();
3863 if (vc->vc_sw->con_font_get)
3864 rc = vc->vc_sw->con_font_get(vc, &font);
3865 else
3866 rc = -ENOSYS;
3867 release_console_sem();
3868
3869 if (rc)
3870 goto out;
3871
3872 c = (font.width+7)/8 * 32 * font.charcount;
Alan Cox04f378b2008-04-30 00:53:29 -07003873
Linus Torvalds1da177e2005-04-16 15:20:36 -07003874 if (op->data && font.charcount > op->charcount)
3875 rc = -ENOSPC;
3876 if (!(op->flags & KD_FONT_FLAG_OLD)) {
3877 if (font.width > op->width || font.height > op->height)
3878 rc = -ENOSPC;
3879 } else {
3880 if (font.width != 8)
3881 rc = -EIO;
3882 else if ((op->height && font.height > op->height) ||
3883 font.height > 32)
3884 rc = -ENOSPC;
3885 }
3886 if (rc)
3887 goto out;
3888
3889 op->height = font.height;
3890 op->width = font.width;
3891 op->charcount = font.charcount;
3892
3893 if (op->data && copy_to_user(op->data, font.data, c))
3894 rc = -EFAULT;
3895
3896out:
3897 kfree(font.data);
3898 return rc;
3899}
3900
3901static int con_font_set(struct vc_data *vc, struct console_font_op *op)
3902{
3903 struct console_font font;
3904 int rc = -EINVAL;
3905 int size;
3906
3907 if (vc->vc_mode != KD_TEXT)
3908 return -EINVAL;
3909 if (!op->data)
3910 return -EINVAL;
3911 if (op->charcount > 512)
3912 return -EINVAL;
3913 if (!op->height) { /* Need to guess font height [compat] */
3914 int h, i;
3915 u8 __user *charmap = op->data;
3916 u8 tmp;
3917
3918 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
3919 so that we can get rid of this soon */
3920 if (!(op->flags & KD_FONT_FLAG_OLD))
3921 return -EINVAL;
3922 for (h = 32; h > 0; h--)
3923 for (i = 0; i < op->charcount; i++) {
3924 if (get_user(tmp, &charmap[32*i+h-1]))
3925 return -EFAULT;
3926 if (tmp)
3927 goto nonzero;
3928 }
3929 return -EINVAL;
3930 nonzero:
3931 op->height = h;
3932 }
3933 if (op->width <= 0 || op->width > 32 || op->height > 32)
3934 return -EINVAL;
3935 size = (op->width+7)/8 * 32 * op->charcount;
3936 if (size > max_font_size)
3937 return -ENOSPC;
3938 font.charcount = op->charcount;
3939 font.height = op->height;
3940 font.width = op->width;
3941 font.data = kmalloc(size, GFP_KERNEL);
3942 if (!font.data)
3943 return -ENOMEM;
3944 if (copy_from_user(font.data, op->data, size)) {
3945 kfree(font.data);
3946 return -EFAULT;
3947 }
3948 acquire_console_sem();
3949 if (vc->vc_sw->con_font_set)
3950 rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
3951 else
3952 rc = -ENOSYS;
3953 release_console_sem();
3954 kfree(font.data);
3955 return rc;
3956}
3957
3958static int con_font_default(struct vc_data *vc, struct console_font_op *op)
3959{
3960 struct console_font font = {.width = op->width, .height = op->height};
3961 char name[MAX_FONT_NAME];
3962 char *s = name;
3963 int rc;
3964
3965 if (vc->vc_mode != KD_TEXT)
3966 return -EINVAL;
3967
3968 if (!op->data)
3969 s = NULL;
3970 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0)
3971 return -EFAULT;
3972 else
3973 name[MAX_FONT_NAME - 1] = 0;
3974
3975 acquire_console_sem();
3976 if (vc->vc_sw->con_font_default)
3977 rc = vc->vc_sw->con_font_default(vc, &font, s);
3978 else
3979 rc = -ENOSYS;
3980 release_console_sem();
3981 if (!rc) {
3982 op->width = font.width;
3983 op->height = font.height;
3984 }
3985 return rc;
3986}
3987
3988static int con_font_copy(struct vc_data *vc, struct console_font_op *op)
3989{
3990 int con = op->height;
3991 int rc;
3992
3993 if (vc->vc_mode != KD_TEXT)
3994 return -EINVAL;
3995
3996 acquire_console_sem();
3997 if (!vc->vc_sw->con_font_copy)
3998 rc = -ENOSYS;
3999 else if (con < 0 || !vc_cons_allocated(con))
4000 rc = -ENOTTY;
4001 else if (con == vc->vc_num) /* nothing to do */
4002 rc = 0;
4003 else
4004 rc = vc->vc_sw->con_font_copy(vc, con);
4005 release_console_sem();
4006 return rc;
4007}
4008
4009int con_font_op(struct vc_data *vc, struct console_font_op *op)
4010{
4011 switch (op->op) {
4012 case KD_FONT_OP_SET:
4013 return con_font_set(vc, op);
4014 case KD_FONT_OP_GET:
4015 return con_font_get(vc, op);
4016 case KD_FONT_OP_SET_DEFAULT:
4017 return con_font_default(vc, op);
4018 case KD_FONT_OP_COPY:
4019 return con_font_copy(vc, op);
4020 }
4021 return -ENOSYS;
4022}
4023
4024/*
4025 * Interface exported to selection and vcs.
4026 */
4027
4028/* used by selection */
4029u16 screen_glyph(struct vc_data *vc, int offset)
4030{
4031 u16 w = scr_readw(screenpos(vc, offset, 1));
4032 u16 c = w & 0xff;
4033
4034 if (w & vc->vc_hi_font_mask)
4035 c |= 0x100;
4036 return c;
4037}
Samuel Thibaultf7511d52008-04-30 00:54:51 -07004038EXPORT_SYMBOL_GPL(screen_glyph);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004039
4040/* used by vcs - note the word offset */
4041unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed)
4042{
4043 return screenpos(vc, 2 * w_offset, viewed);
4044}
4045
4046void getconsxy(struct vc_data *vc, unsigned char *p)
4047{
4048 p[0] = vc->vc_x;
4049 p[1] = vc->vc_y;
4050}
4051
4052void putconsxy(struct vc_data *vc, unsigned char *p)
4053{
Antonino A. Daplas9477e262006-02-01 03:06:52 -08004054 hide_cursor(vc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004055 gotoxy(vc, p[0], p[1]);
4056 set_cursor(vc);
4057}
4058
4059u16 vcs_scr_readw(struct vc_data *vc, const u16 *org)
4060{
4061 if ((unsigned long)org == vc->vc_pos && softcursor_original != -1)
4062 return softcursor_original;
4063 return scr_readw(org);
4064}
4065
4066void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org)
4067{
4068 scr_writew(val, org);
4069 if ((unsigned long)org == vc->vc_pos) {
4070 softcursor_original = -1;
4071 add_softcursor(vc);
4072 }
4073}
4074
Linus Torvalds1da177e2005-04-16 15:20:36 -07004075/*
4076 * Visible symbols for modules
4077 */
4078
4079EXPORT_SYMBOL(color_table);
4080EXPORT_SYMBOL(default_red);
4081EXPORT_SYMBOL(default_grn);
4082EXPORT_SYMBOL(default_blu);
4083EXPORT_SYMBOL(update_region);
4084EXPORT_SYMBOL(redraw_screen);
4085EXPORT_SYMBOL(vc_resize);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004086EXPORT_SYMBOL(fg_console);
4087EXPORT_SYMBOL(console_blank_hook);
4088EXPORT_SYMBOL(console_blanked);
4089EXPORT_SYMBOL(vc_cons);
4090#ifndef VT_SINGLE_DRIVER
4091EXPORT_SYMBOL(take_over_console);
4092EXPORT_SYMBOL(give_up_console);
4093#endif