Commit | Line | Data |
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1da177e4 LT |
1 | /* |
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 | |
e1f8e874 | 62 | * deletion SMP-safe. 17Jun00, Andrew Morton |
1da177e4 LT |
63 | * |
64 | * Removed console_lock, enabled interrupts across all console operations | |
65 | * 13 March 2001, Andrew Morton | |
d4328b40 AT |
66 | * |
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 | |
1da177e4 LT |
73 | */ |
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> | |
c831c338 | 89 | #include <linux/mutex.h> |
1da177e4 LT |
90 | #include <linux/vt_kern.h> |
91 | #include <linux/selection.h> | |
405f5571 | 92 | #include <linux/smp_lock.h> |
1da177e4 LT |
93 | #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> | |
1da177e4 | 98 | #include <linux/workqueue.h> |
1da177e4 LT |
99 | #include <linux/pm.h> |
100 | #include <linux/font.h> | |
101 | #include <linux/bitops.h> | |
b293d758 | 102 | #include <linux/notifier.h> |
d81ed103 AC |
103 | #include <linux/device.h> |
104 | #include <linux/io.h> | |
1da177e4 | 105 | #include <asm/system.h> |
d81ed103 | 106 | #include <linux/uaccess.h> |
81d44507 | 107 | #include <linux/kdb.h> |
74c807ce | 108 | #include <linux/ctype.h> |
1da177e4 | 109 | |
3e795de7 | 110 | #define MAX_NR_CON_DRIVER 16 |
1da177e4 | 111 | |
6db4063c | 112 | #define CON_DRIVER_FLAG_MODULE 1 |
928e964f AD |
113 | #define CON_DRIVER_FLAG_INIT 2 |
114 | #define CON_DRIVER_FLAG_ATTR 4 | |
3e795de7 AD |
115 | |
116 | struct con_driver { | |
117 | const struct consw *con; | |
118 | const char *desc; | |
805952a8 | 119 | struct device *dev; |
6db4063c | 120 | int node; |
3e795de7 AD |
121 | int first; |
122 | int last; | |
123 | int flag; | |
124 | }; | |
125 | ||
126 | static struct con_driver registered_con_driver[MAX_NR_CON_DRIVER]; | |
1da177e4 LT |
127 | const struct consw *conswitchp; |
128 | ||
129 | /* A bitmap for codes <32. A bit of 1 indicates that the code | |
130 | * corresponding to that bit number invokes some special action | |
131 | * (such as cursor movement) and should not be displayed as a | |
132 | * glyph unless the disp_ctrl mode is explicitly enabled. | |
133 | */ | |
134 | #define CTRL_ACTION 0x0d00ff81 | |
135 | #define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */ | |
136 | ||
137 | /* | |
138 | * Here is the default bell parameters: 750HZ, 1/8th of a second | |
139 | */ | |
140 | #define DEFAULT_BELL_PITCH 750 | |
141 | #define DEFAULT_BELL_DURATION (HZ/8) | |
142 | ||
1da177e4 LT |
143 | struct vc vc_cons [MAX_NR_CONSOLES]; |
144 | ||
145 | #ifndef VT_SINGLE_DRIVER | |
146 | static const struct consw *con_driver_map[MAX_NR_CONSOLES]; | |
147 | #endif | |
148 | ||
149 | static int con_open(struct tty_struct *, struct file *); | |
150 | static void vc_init(struct vc_data *vc, unsigned int rows, | |
151 | unsigned int cols, int do_clear); | |
152 | static void gotoxy(struct vc_data *vc, int new_x, int new_y); | |
153 | static void save_cur(struct vc_data *vc); | |
154 | static void reset_terminal(struct vc_data *vc, int do_clear); | |
155 | static void con_flush_chars(struct tty_struct *tty); | |
403aac96 | 156 | static int set_vesa_blanking(char __user *p); |
1da177e4 LT |
157 | static void set_cursor(struct vc_data *vc); |
158 | static void hide_cursor(struct vc_data *vc); | |
65f27f38 | 159 | static void console_callback(struct work_struct *ignored); |
1da177e4 LT |
160 | static void blank_screen_t(unsigned long dummy); |
161 | static void set_palette(struct vc_data *vc); | |
162 | ||
163 | static int printable; /* Is console ready for printing? */ | |
77bf2bab | 164 | int default_utf8 = true; |
042f10ec | 165 | module_param(default_utf8, int, S_IRUGO | S_IWUSR); |
f6c06b68 MG |
166 | int global_cursor_default = -1; |
167 | module_param(global_cursor_default, int, S_IRUGO | S_IWUSR); | |
1da177e4 | 168 | |
9ea9a886 CL |
169 | static int cur_default = CUR_DEFAULT; |
170 | module_param(cur_default, int, S_IRUGO | S_IWUSR); | |
171 | ||
1da177e4 LT |
172 | /* |
173 | * ignore_poke: don't unblank the screen when things are typed. This is | |
174 | * mainly for the privacy of braille terminal users. | |
175 | */ | |
176 | static int ignore_poke; | |
177 | ||
178 | int do_poke_blanked_console; | |
179 | int console_blanked; | |
180 | ||
181 | static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */ | |
1da177e4 | 182 | static int vesa_off_interval; |
f324edc8 DM |
183 | static int blankinterval = 10*60; |
184 | core_param(consoleblank, blankinterval, int, 0444); | |
1da177e4 | 185 | |
65f27f38 | 186 | static DECLARE_WORK(console_work, console_callback); |
1da177e4 LT |
187 | |
188 | /* | |
189 | * fg_console is the current virtual console, | |
190 | * last_console is the last used one, | |
191 | * want_console is the console we want to switch to, | |
b45cfba4 | 192 | * saved_* variants are for save/restore around kernel debugger enter/leave |
1da177e4 LT |
193 | */ |
194 | int fg_console; | |
195 | int last_console; | |
196 | int want_console = -1; | |
fed891c8 JW |
197 | static int saved_fg_console; |
198 | static int saved_last_console; | |
199 | static int saved_want_console; | |
200 | static int saved_vc_mode; | |
beed5336 | 201 | static int saved_console_blanked; |
1da177e4 LT |
202 | |
203 | /* | |
204 | * For each existing display, we have a pointer to console currently visible | |
205 | * on that display, allowing consoles other than fg_console to be refreshed | |
206 | * appropriately. Unless the low-level driver supplies its own display_fg | |
207 | * variable, we use this one for the "master display". | |
208 | */ | |
209 | static struct vc_data *master_display_fg; | |
210 | ||
211 | /* | |
212 | * Unfortunately, we need to delay tty echo when we're currently writing to the | |
213 | * console since the code is (and always was) not re-entrant, so we schedule | |
214 | * all flip requests to process context with schedule-task() and run it from | |
215 | * console_callback(). | |
216 | */ | |
217 | ||
218 | /* | |
219 | * For the same reason, we defer scrollback to the console callback. | |
220 | */ | |
221 | static int scrollback_delta; | |
222 | ||
223 | /* | |
224 | * Hook so that the power management routines can (un)blank | |
225 | * the console on our behalf. | |
226 | */ | |
227 | int (*console_blank_hook)(int); | |
228 | ||
40565f19 | 229 | static DEFINE_TIMER(console_timer, blank_screen_t, 0, 0); |
1da177e4 LT |
230 | static int blank_state; |
231 | static int blank_timer_expired; | |
232 | enum { | |
233 | blank_off = 0, | |
234 | blank_normal_wait, | |
235 | blank_vesa_wait, | |
236 | }; | |
237 | ||
fbc92a34 KS |
238 | /* |
239 | * /sys/class/tty/tty0/ | |
240 | * | |
241 | * the attribute 'active' contains the name of the current vc | |
242 | * console and it supports poll() to detect vc switches | |
243 | */ | |
244 | static struct device *tty0dev; | |
245 | ||
b293d758 ST |
246 | /* |
247 | * Notifier list for console events. | |
248 | */ | |
249 | static ATOMIC_NOTIFIER_HEAD(vt_notifier_list); | |
250 | ||
251 | int register_vt_notifier(struct notifier_block *nb) | |
252 | { | |
253 | return atomic_notifier_chain_register(&vt_notifier_list, nb); | |
254 | } | |
255 | EXPORT_SYMBOL_GPL(register_vt_notifier); | |
256 | ||
257 | int unregister_vt_notifier(struct notifier_block *nb) | |
258 | { | |
259 | return atomic_notifier_chain_unregister(&vt_notifier_list, nb); | |
260 | } | |
261 | EXPORT_SYMBOL_GPL(unregister_vt_notifier); | |
262 | ||
263 | static void notify_write(struct vc_data *vc, unsigned int unicode) | |
264 | { | |
265 | struct vt_notifier_param param = { .vc = vc, unicode = unicode }; | |
266 | atomic_notifier_call_chain(&vt_notifier_list, VT_WRITE, ¶m); | |
267 | } | |
268 | ||
269 | static void notify_update(struct vc_data *vc) | |
270 | { | |
271 | struct vt_notifier_param param = { .vc = vc }; | |
272 | atomic_notifier_call_chain(&vt_notifier_list, VT_UPDATE, ¶m); | |
273 | } | |
1da177e4 LT |
274 | /* |
275 | * Low-Level Functions | |
276 | */ | |
277 | ||
278 | #define IS_FG(vc) ((vc)->vc_num == fg_console) | |
279 | ||
280 | #ifdef VT_BUF_VRAM_ONLY | |
281 | #define DO_UPDATE(vc) 0 | |
282 | #else | |
f700d6e5 | 283 | #define DO_UPDATE(vc) (CON_IS_VISIBLE(vc) && !console_blanked) |
1da177e4 LT |
284 | #endif |
285 | ||
286 | static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed) | |
287 | { | |
288 | unsigned short *p; | |
289 | ||
290 | if (!viewed) | |
291 | p = (unsigned short *)(vc->vc_origin + offset); | |
292 | else if (!vc->vc_sw->con_screen_pos) | |
293 | p = (unsigned short *)(vc->vc_visible_origin + offset); | |
294 | else | |
295 | p = vc->vc_sw->con_screen_pos(vc, offset); | |
296 | return p; | |
297 | } | |
298 | ||
e33ac1c1 | 299 | /* Called from the keyboard irq path.. */ |
1da177e4 LT |
300 | static inline void scrolldelta(int lines) |
301 | { | |
e33ac1c1 AC |
302 | /* FIXME */ |
303 | /* scrolldelta needs some kind of consistency lock, but the BKL was | |
304 | and still is not protecting versus the scheduled back end */ | |
1da177e4 LT |
305 | scrollback_delta += lines; |
306 | schedule_console_callback(); | |
307 | } | |
308 | ||
309 | void schedule_console_callback(void) | |
310 | { | |
311 | schedule_work(&console_work); | |
312 | } | |
313 | ||
314 | static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr) | |
315 | { | |
316 | unsigned short *d, *s; | |
317 | ||
318 | if (t+nr >= b) | |
319 | nr = b - t - 1; | |
320 | if (b > vc->vc_rows || t >= b || nr < 1) | |
321 | return; | |
322 | if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr)) | |
323 | return; | |
324 | d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t); | |
325 | s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr)); | |
326 | scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row); | |
386f40c8 | 327 | scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_video_erase_char, |
1da177e4 LT |
328 | vc->vc_size_row * nr); |
329 | } | |
330 | ||
331 | static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr) | |
332 | { | |
333 | unsigned short *s; | |
334 | unsigned int step; | |
335 | ||
336 | if (t+nr >= b) | |
337 | nr = b - t - 1; | |
338 | if (b > vc->vc_rows || t >= b || nr < 1) | |
339 | return; | |
340 | if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr)) | |
341 | return; | |
342 | s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t); | |
343 | step = vc->vc_cols * nr; | |
344 | scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row); | |
93f78da4 | 345 | scr_memsetw(s, vc->vc_video_erase_char, 2 * step); |
1da177e4 LT |
346 | } |
347 | ||
348 | static void do_update_region(struct vc_data *vc, unsigned long start, int count) | |
349 | { | |
350 | #ifndef VT_BUF_VRAM_ONLY | |
351 | unsigned int xx, yy, offset; | |
352 | u16 *p; | |
353 | ||
354 | p = (u16 *) start; | |
355 | if (!vc->vc_sw->con_getxy) { | |
356 | offset = (start - vc->vc_origin) / 2; | |
357 | xx = offset % vc->vc_cols; | |
358 | yy = offset / vc->vc_cols; | |
359 | } else { | |
360 | int nxx, nyy; | |
361 | start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy); | |
362 | xx = nxx; yy = nyy; | |
363 | } | |
364 | for(;;) { | |
365 | u16 attrib = scr_readw(p) & 0xff00; | |
366 | int startx = xx; | |
367 | u16 *q = p; | |
368 | while (xx < vc->vc_cols && count) { | |
369 | if (attrib != (scr_readw(p) & 0xff00)) { | |
370 | if (p > q) | |
371 | vc->vc_sw->con_putcs(vc, q, p-q, yy, startx); | |
372 | startx = xx; | |
373 | q = p; | |
374 | attrib = scr_readw(p) & 0xff00; | |
375 | } | |
376 | p++; | |
377 | xx++; | |
378 | count--; | |
379 | } | |
380 | if (p > q) | |
381 | vc->vc_sw->con_putcs(vc, q, p-q, yy, startx); | |
382 | if (!count) | |
383 | break; | |
384 | xx = 0; | |
385 | yy++; | |
386 | if (vc->vc_sw->con_getxy) { | |
387 | p = (u16 *)start; | |
388 | start = vc->vc_sw->con_getxy(vc, start, NULL, NULL); | |
389 | } | |
390 | } | |
391 | #endif | |
392 | } | |
393 | ||
394 | void update_region(struct vc_data *vc, unsigned long start, int count) | |
395 | { | |
396 | WARN_CONSOLE_UNLOCKED(); | |
397 | ||
398 | if (DO_UPDATE(vc)) { | |
399 | hide_cursor(vc); | |
400 | do_update_region(vc, start, count); | |
401 | set_cursor(vc); | |
402 | } | |
403 | } | |
404 | ||
405 | /* Structure of attributes is hardware-dependent */ | |
406 | ||
fa6ce9ab JE |
407 | static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink, |
408 | u8 _underline, u8 _reverse, u8 _italic) | |
1da177e4 LT |
409 | { |
410 | if (vc->vc_sw->con_build_attr) | |
fa6ce9ab JE |
411 | return vc->vc_sw->con_build_attr(vc, _color, _intensity, |
412 | _blink, _underline, _reverse, _italic); | |
1da177e4 LT |
413 | |
414 | #ifndef VT_BUF_VRAM_ONLY | |
415 | /* | |
416 | * ++roman: I completely changed the attribute format for monochrome | |
417 | * mode (!can_do_color). The formerly used MDA (monochrome display | |
418 | * adapter) format didn't allow the combination of certain effects. | |
419 | * Now the attribute is just a bit vector: | |
420 | * Bit 0..1: intensity (0..2) | |
421 | * Bit 2 : underline | |
422 | * Bit 3 : reverse | |
423 | * Bit 7 : blink | |
424 | */ | |
425 | { | |
c9e587ab | 426 | u8 a = _color; |
1da177e4 LT |
427 | if (!vc->vc_can_do_color) |
428 | return _intensity | | |
fa6ce9ab | 429 | (_italic ? 2 : 0) | |
1da177e4 LT |
430 | (_underline ? 4 : 0) | |
431 | (_reverse ? 8 : 0) | | |
432 | (_blink ? 0x80 : 0); | |
fa6ce9ab JE |
433 | if (_italic) |
434 | a = (a & 0xF0) | vc->vc_itcolor; | |
435 | else if (_underline) | |
1da177e4 LT |
436 | a = (a & 0xf0) | vc->vc_ulcolor; |
437 | else if (_intensity == 0) | |
438 | a = (a & 0xf0) | vc->vc_ulcolor; | |
439 | if (_reverse) | |
440 | a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77); | |
441 | if (_blink) | |
442 | a ^= 0x80; | |
443 | if (_intensity == 2) | |
444 | a ^= 0x08; | |
445 | if (vc->vc_hi_font_mask == 0x100) | |
446 | a <<= 1; | |
447 | return a; | |
448 | } | |
449 | #else | |
450 | return 0; | |
451 | #endif | |
452 | } | |
453 | ||
454 | static void update_attr(struct vc_data *vc) | |
455 | { | |
fa6ce9ab JE |
456 | vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity, |
457 | vc->vc_blink, vc->vc_underline, | |
458 | vc->vc_reverse ^ vc->vc_decscnm, vc->vc_italic); | |
459 | vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm, 0) << 8) | ' '; | |
1da177e4 LT |
460 | } |
461 | ||
462 | /* Note: inverting the screen twice should revert to the original state */ | |
463 | void invert_screen(struct vc_data *vc, int offset, int count, int viewed) | |
464 | { | |
465 | unsigned short *p; | |
466 | ||
467 | WARN_CONSOLE_UNLOCKED(); | |
468 | ||
469 | count /= 2; | |
470 | p = screenpos(vc, offset, viewed); | |
471 | if (vc->vc_sw->con_invert_region) | |
472 | vc->vc_sw->con_invert_region(vc, p, count); | |
473 | #ifndef VT_BUF_VRAM_ONLY | |
474 | else { | |
475 | u16 *q = p; | |
476 | int cnt = count; | |
477 | u16 a; | |
478 | ||
479 | if (!vc->vc_can_do_color) { | |
480 | while (cnt--) { | |
481 | a = scr_readw(q); | |
482 | a ^= 0x0800; | |
483 | scr_writew(a, q); | |
484 | q++; | |
485 | } | |
486 | } else if (vc->vc_hi_font_mask == 0x100) { | |
487 | while (cnt--) { | |
488 | a = scr_readw(q); | |
489 | a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4); | |
490 | scr_writew(a, q); | |
491 | q++; | |
492 | } | |
493 | } else { | |
494 | while (cnt--) { | |
495 | a = scr_readw(q); | |
496 | a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4); | |
497 | scr_writew(a, q); | |
498 | q++; | |
499 | } | |
500 | } | |
501 | } | |
502 | #endif | |
503 | if (DO_UPDATE(vc)) | |
504 | do_update_region(vc, (unsigned long) p, count); | |
505 | } | |
506 | ||
507 | /* used by selection: complement pointer position */ | |
508 | void complement_pos(struct vc_data *vc, int offset) | |
509 | { | |
414edcd3 | 510 | static int old_offset = -1; |
1da177e4 LT |
511 | static unsigned short old; |
512 | static unsigned short oldx, oldy; | |
513 | ||
514 | WARN_CONSOLE_UNLOCKED(); | |
515 | ||
414edcd3 AD |
516 | if (old_offset != -1 && old_offset >= 0 && |
517 | old_offset < vc->vc_screenbuf_size) { | |
518 | scr_writew(old, screenpos(vc, old_offset, 1)); | |
1da177e4 LT |
519 | if (DO_UPDATE(vc)) |
520 | vc->vc_sw->con_putc(vc, old, oldy, oldx); | |
521 | } | |
414edcd3 AD |
522 | |
523 | old_offset = offset; | |
524 | ||
525 | if (offset != -1 && offset >= 0 && | |
526 | offset < vc->vc_screenbuf_size) { | |
1da177e4 | 527 | unsigned short new; |
414edcd3 | 528 | unsigned short *p; |
1da177e4 LT |
529 | p = screenpos(vc, offset, 1); |
530 | old = scr_readw(p); | |
531 | new = old ^ vc->vc_complement_mask; | |
532 | scr_writew(new, p); | |
533 | if (DO_UPDATE(vc)) { | |
534 | oldx = (offset >> 1) % vc->vc_cols; | |
535 | oldy = (offset >> 1) / vc->vc_cols; | |
536 | vc->vc_sw->con_putc(vc, new, oldy, oldx); | |
537 | } | |
538 | } | |
414edcd3 | 539 | |
1da177e4 LT |
540 | } |
541 | ||
542 | static void insert_char(struct vc_data *vc, unsigned int nr) | |
543 | { | |
544 | unsigned short *p, *q = (unsigned short *)vc->vc_pos; | |
545 | ||
546 | p = q + vc->vc_cols - nr - vc->vc_x; | |
547 | while (--p >= q) | |
548 | scr_writew(scr_readw(p), p + nr); | |
549 | scr_memsetw(q, 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, vc->vc_y, vc->vc_x + nr, 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, vc->vc_x + nr); | |
558 | vc->vc_attr = oldattr; | |
559 | } | |
560 | } | |
561 | ||
562 | static void delete_char(struct vc_data *vc, unsigned int nr) | |
563 | { | |
564 | unsigned int i = vc->vc_x; | |
565 | unsigned short *p = (unsigned short *)vc->vc_pos; | |
566 | ||
567 | while (++i <= vc->vc_cols - nr) { | |
568 | scr_writew(scr_readw(p+nr), p); | |
569 | p++; | |
570 | } | |
571 | scr_memsetw(p, vc->vc_video_erase_char, nr * 2); | |
572 | vc->vc_need_wrap = 0; | |
573 | if (DO_UPDATE(vc)) { | |
574 | unsigned short oldattr = vc->vc_attr; | |
575 | vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x + nr, vc->vc_y, vc->vc_x, 1, | |
576 | vc->vc_cols - vc->vc_x - nr); | |
577 | vc->vc_attr = vc->vc_video_erase_char >> 8; | |
578 | while (nr--) | |
579 | vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y, | |
580 | vc->vc_cols - 1 - nr); | |
581 | vc->vc_attr = oldattr; | |
582 | } | |
583 | } | |
584 | ||
585 | static int softcursor_original; | |
586 | ||
587 | static void add_softcursor(struct vc_data *vc) | |
588 | { | |
589 | int i = scr_readw((u16 *) vc->vc_pos); | |
590 | u32 type = vc->vc_cursor_type; | |
591 | ||
592 | if (! (type & 0x10)) return; | |
593 | if (softcursor_original != -1) return; | |
594 | softcursor_original = i; | |
595 | i |= ((type >> 8) & 0xff00 ); | |
596 | i ^= ((type) & 0xff00 ); | |
597 | if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000; | |
598 | if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700; | |
599 | scr_writew(i, (u16 *) vc->vc_pos); | |
600 | if (DO_UPDATE(vc)) | |
601 | vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x); | |
602 | } | |
603 | ||
604 | static void hide_softcursor(struct vc_data *vc) | |
605 | { | |
606 | if (softcursor_original != -1) { | |
607 | scr_writew(softcursor_original, (u16 *)vc->vc_pos); | |
608 | if (DO_UPDATE(vc)) | |
609 | vc->vc_sw->con_putc(vc, softcursor_original, | |
610 | vc->vc_y, vc->vc_x); | |
611 | softcursor_original = -1; | |
612 | } | |
613 | } | |
614 | ||
615 | static void hide_cursor(struct vc_data *vc) | |
616 | { | |
617 | if (vc == sel_cons) | |
618 | clear_selection(); | |
619 | vc->vc_sw->con_cursor(vc, CM_ERASE); | |
620 | hide_softcursor(vc); | |
621 | } | |
622 | ||
623 | static void set_cursor(struct vc_data *vc) | |
624 | { | |
625 | if (!IS_FG(vc) || console_blanked || | |
626 | vc->vc_mode == KD_GRAPHICS) | |
627 | return; | |
628 | if (vc->vc_deccm) { | |
629 | if (vc == sel_cons) | |
630 | clear_selection(); | |
631 | add_softcursor(vc); | |
632 | if ((vc->vc_cursor_type & 0x0f) != 1) | |
633 | vc->vc_sw->con_cursor(vc, CM_DRAW); | |
634 | } else | |
635 | hide_cursor(vc); | |
636 | } | |
637 | ||
638 | static void set_origin(struct vc_data *vc) | |
639 | { | |
640 | WARN_CONSOLE_UNLOCKED(); | |
641 | ||
642 | if (!CON_IS_VISIBLE(vc) || | |
643 | !vc->vc_sw->con_set_origin || | |
644 | !vc->vc_sw->con_set_origin(vc)) | |
645 | vc->vc_origin = (unsigned long)vc->vc_screenbuf; | |
646 | vc->vc_visible_origin = vc->vc_origin; | |
647 | vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size; | |
648 | vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x; | |
649 | } | |
650 | ||
651 | static inline void save_screen(struct vc_data *vc) | |
652 | { | |
653 | WARN_CONSOLE_UNLOCKED(); | |
654 | ||
655 | if (vc->vc_sw->con_save_screen) | |
656 | vc->vc_sw->con_save_screen(vc); | |
657 | } | |
658 | ||
659 | /* | |
660 | * Redrawing of screen | |
661 | */ | |
662 | ||
663 | static void clear_buffer_attributes(struct vc_data *vc) | |
664 | { | |
665 | unsigned short *p = (unsigned short *)vc->vc_origin; | |
666 | int count = vc->vc_screenbuf_size / 2; | |
667 | int mask = vc->vc_hi_font_mask | 0xff; | |
668 | ||
669 | for (; count > 0; count--, p++) { | |
670 | scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p); | |
671 | } | |
672 | } | |
673 | ||
674 | void redraw_screen(struct vc_data *vc, int is_switch) | |
675 | { | |
676 | int redraw = 0; | |
677 | ||
678 | WARN_CONSOLE_UNLOCKED(); | |
679 | ||
680 | if (!vc) { | |
681 | /* strange ... */ | |
682 | /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */ | |
683 | return; | |
684 | } | |
685 | ||
686 | if (is_switch) { | |
687 | struct vc_data *old_vc = vc_cons[fg_console].d; | |
688 | if (old_vc == vc) | |
689 | return; | |
690 | if (!CON_IS_VISIBLE(vc)) | |
691 | redraw = 1; | |
692 | *vc->vc_display_fg = vc; | |
693 | fg_console = vc->vc_num; | |
694 | hide_cursor(old_vc); | |
695 | if (!CON_IS_VISIBLE(old_vc)) { | |
696 | save_screen(old_vc); | |
697 | set_origin(old_vc); | |
698 | } | |
fbc92a34 KS |
699 | if (tty0dev) |
700 | sysfs_notify(&tty0dev->kobj, NULL, "active"); | |
1da177e4 LT |
701 | } else { |
702 | hide_cursor(vc); | |
703 | redraw = 1; | |
704 | } | |
705 | ||
706 | if (redraw) { | |
707 | int update; | |
708 | int old_was_color = vc->vc_can_do_color; | |
709 | ||
710 | set_origin(vc); | |
711 | update = vc->vc_sw->con_switch(vc); | |
712 | set_palette(vc); | |
713 | /* | |
714 | * If console changed from mono<->color, the best we can do | |
715 | * is to clear the buffer attributes. As it currently stands, | |
716 | * rebuilding new attributes from the old buffer is not doable | |
717 | * without overly complex code. | |
718 | */ | |
719 | if (old_was_color != vc->vc_can_do_color) { | |
720 | update_attr(vc); | |
721 | clear_buffer_attributes(vc); | |
722 | } | |
8fd4bd22 JB |
723 | |
724 | /* Forcibly update if we're panicing */ | |
725 | if ((update && vc->vc_mode != KD_GRAPHICS) || | |
726 | vt_force_oops_output(vc)) | |
1da177e4 LT |
727 | do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2); |
728 | } | |
729 | set_cursor(vc); | |
730 | if (is_switch) { | |
731 | set_leds(); | |
732 | compute_shiftstate(); | |
8182ec49 | 733 | notify_update(vc); |
1da177e4 LT |
734 | } |
735 | } | |
736 | ||
737 | /* | |
738 | * Allocation, freeing and resizing of VTs. | |
739 | */ | |
740 | ||
741 | int vc_cons_allocated(unsigned int i) | |
742 | { | |
743 | return (i < MAX_NR_CONSOLES && vc_cons[i].d); | |
744 | } | |
745 | ||
746 | static void visual_init(struct vc_data *vc, int num, int init) | |
747 | { | |
748 | /* ++Geert: vc->vc_sw->con_init determines console size */ | |
749 | if (vc->vc_sw) | |
750 | module_put(vc->vc_sw->owner); | |
751 | vc->vc_sw = conswitchp; | |
752 | #ifndef VT_SINGLE_DRIVER | |
753 | if (con_driver_map[num]) | |
754 | vc->vc_sw = con_driver_map[num]; | |
755 | #endif | |
756 | __module_get(vc->vc_sw->owner); | |
757 | vc->vc_num = num; | |
758 | vc->vc_display_fg = &master_display_fg; | |
759 | vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir; | |
760 | vc->vc_uni_pagedir = 0; | |
761 | vc->vc_hi_font_mask = 0; | |
762 | vc->vc_complement_mask = 0; | |
763 | vc->vc_can_do_color = 0; | |
8fd4bd22 | 764 | vc->vc_panic_force_write = false; |
1da177e4 LT |
765 | vc->vc_sw->con_init(vc, init); |
766 | if (!vc->vc_complement_mask) | |
767 | vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; | |
768 | vc->vc_s_complement_mask = vc->vc_complement_mask; | |
769 | vc->vc_size_row = vc->vc_cols << 1; | |
770 | vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row; | |
771 | } | |
772 | ||
773 | int vc_allocate(unsigned int currcons) /* return 0 on success */ | |
774 | { | |
775 | WARN_CONSOLE_UNLOCKED(); | |
776 | ||
777 | if (currcons >= MAX_NR_CONSOLES) | |
778 | return -ENXIO; | |
779 | if (!vc_cons[currcons].d) { | |
780 | struct vc_data *vc; | |
b293d758 | 781 | struct vt_notifier_param param; |
1da177e4 LT |
782 | |
783 | /* prevent users from taking too much memory */ | |
784 | if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE)) | |
785 | return -EPERM; | |
786 | ||
787 | /* due to the granularity of kmalloc, we waste some memory here */ | |
788 | /* the alloc is done in two steps, to optimize the common situation | |
789 | of a 25x80 console (structsize=216, screenbuf_size=4000) */ | |
790 | /* although the numbers above are not valid since long ago, the | |
791 | point is still up-to-date and the comment still has its value | |
792 | even if only as a historical artifact. --mj, July 1998 */ | |
b293d758 | 793 | param.vc = vc = kzalloc(sizeof(struct vc_data), GFP_KERNEL); |
1da177e4 LT |
794 | if (!vc) |
795 | return -ENOMEM; | |
1da177e4 | 796 | vc_cons[currcons].d = vc; |
ff917ba4 | 797 | tty_port_init(&vc->port); |
c2c88f10 | 798 | INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK); |
1da177e4 LT |
799 | visual_init(vc, currcons, 1); |
800 | if (!*vc->vc_uni_pagedir_loc) | |
801 | con_set_default_unimap(vc); | |
5c9228f0 | 802 | vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL); |
1da177e4 LT |
803 | if (!vc->vc_screenbuf) { |
804 | kfree(vc); | |
805 | vc_cons[currcons].d = NULL; | |
806 | return -ENOMEM; | |
807 | } | |
f6c06b68 MG |
808 | |
809 | /* If no drivers have overridden us and the user didn't pass a | |
810 | boot option, default to displaying the cursor */ | |
811 | if (global_cursor_default == -1) | |
812 | global_cursor_default = 1; | |
813 | ||
1da177e4 | 814 | vc_init(vc, vc->vc_rows, vc->vc_cols, 1); |
4995f8ef | 815 | vcs_make_sysfs(currcons); |
b293d758 | 816 | atomic_notifier_call_chain(&vt_notifier_list, VT_ALLOCATE, ¶m); |
1da177e4 LT |
817 | } |
818 | return 0; | |
819 | } | |
820 | ||
e400b6ec AD |
821 | static inline int resize_screen(struct vc_data *vc, int width, int height, |
822 | int user) | |
1da177e4 LT |
823 | { |
824 | /* Resizes the resolution of the display adapater */ | |
825 | int err = 0; | |
826 | ||
827 | if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize) | |
e400b6ec AD |
828 | err = vc->vc_sw->con_resize(vc, width, height, user); |
829 | ||
1da177e4 LT |
830 | return err; |
831 | } | |
832 | ||
833 | /* | |
834 | * Change # of rows and columns (0 means unchanged/the size of fg_console) | |
835 | * [this is to be used together with some user program | |
836 | * like resize that changes the hardware videomode] | |
837 | */ | |
838 | #define VC_RESIZE_MAXCOL (32767) | |
839 | #define VC_RESIZE_MAXROW (32767) | |
8c9a9dd0 AC |
840 | |
841 | /** | |
842 | * vc_do_resize - resizing method for the tty | |
843 | * @tty: tty being resized | |
844 | * @real_tty: real tty (different to tty if a pty/tty pair) | |
845 | * @vc: virtual console private data | |
846 | * @cols: columns | |
847 | * @lines: lines | |
848 | * | |
849 | * Resize a virtual console, clipping according to the actual constraints. | |
850 | * If the caller passes a tty structure then update the termios winsize | |
3ad2f3fb | 851 | * information and perform any necessary signal handling. |
8c9a9dd0 AC |
852 | * |
853 | * Caller must hold the console semaphore. Takes the termios mutex and | |
854 | * ctrl_lock of the tty IFF a tty is passed. | |
855 | */ | |
856 | ||
fc6f6238 AC |
857 | static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc, |
858 | unsigned int cols, unsigned int lines) | |
1da177e4 LT |
859 | { |
860 | unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0; | |
9e0ba741 | 861 | unsigned long end; |
1da177e4 LT |
862 | unsigned int old_cols, old_rows, old_row_size, old_screen_size; |
863 | unsigned int new_cols, new_rows, new_row_size, new_screen_size; | |
9e0ba741 | 864 | unsigned int user; |
1da177e4 LT |
865 | unsigned short *newscreen; |
866 | ||
867 | WARN_CONSOLE_UNLOCKED(); | |
868 | ||
869 | if (!vc) | |
870 | return -ENXIO; | |
871 | ||
e400b6ec AD |
872 | user = vc->vc_resize_user; |
873 | vc->vc_resize_user = 0; | |
874 | ||
1da177e4 LT |
875 | if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW) |
876 | return -EINVAL; | |
877 | ||
878 | new_cols = (cols ? cols : vc->vc_cols); | |
879 | new_rows = (lines ? lines : vc->vc_rows); | |
880 | new_row_size = new_cols << 1; | |
881 | new_screen_size = new_row_size * new_rows; | |
882 | ||
883 | if (new_cols == vc->vc_cols && new_rows == vc->vc_rows) | |
884 | return 0; | |
885 | ||
5cbded58 | 886 | newscreen = kmalloc(new_screen_size, GFP_USER); |
1da177e4 LT |
887 | if (!newscreen) |
888 | return -ENOMEM; | |
889 | ||
890 | old_rows = vc->vc_rows; | |
891 | old_cols = vc->vc_cols; | |
892 | old_row_size = vc->vc_size_row; | |
893 | old_screen_size = vc->vc_screenbuf_size; | |
894 | ||
e400b6ec | 895 | err = resize_screen(vc, new_cols, new_rows, user); |
1da177e4 LT |
896 | if (err) { |
897 | kfree(newscreen); | |
898 | return err; | |
899 | } | |
900 | ||
901 | vc->vc_rows = new_rows; | |
902 | vc->vc_cols = new_cols; | |
903 | vc->vc_size_row = new_row_size; | |
904 | vc->vc_screenbuf_size = new_screen_size; | |
905 | ||
906 | rlth = min(old_row_size, new_row_size); | |
907 | rrem = new_row_size - rlth; | |
908 | old_origin = vc->vc_origin; | |
909 | new_origin = (long) newscreen; | |
910 | new_scr_end = new_origin + new_screen_size; | |
3b41dc1a AD |
911 | |
912 | if (vc->vc_y > new_rows) { | |
913 | if (old_rows - vc->vc_y < new_rows) { | |
914 | /* | |
915 | * Cursor near the bottom, copy contents from the | |
916 | * bottom of buffer | |
917 | */ | |
918 | old_origin += (old_rows - new_rows) * old_row_size; | |
3b41dc1a AD |
919 | } else { |
920 | /* | |
921 | * Cursor is in no man's land, copy 1/2 screenful | |
922 | * from the top and bottom of cursor position | |
923 | */ | |
924 | old_origin += (vc->vc_y - new_rows/2) * old_row_size; | |
3b41dc1a | 925 | } |
9fc2b2d0 FJ |
926 | } |
927 | ||
928 | end = old_origin + old_row_size * min(old_rows, new_rows); | |
1da177e4 LT |
929 | |
930 | update_attr(vc); | |
931 | ||
3b41dc1a AD |
932 | while (old_origin < end) { |
933 | scr_memcpyw((unsigned short *) new_origin, | |
934 | (unsigned short *) old_origin, rlth); | |
1da177e4 | 935 | if (rrem) |
3b41dc1a AD |
936 | scr_memsetw((void *)(new_origin + rlth), |
937 | vc->vc_video_erase_char, rrem); | |
1da177e4 LT |
938 | old_origin += old_row_size; |
939 | new_origin += new_row_size; | |
940 | } | |
941 | if (new_scr_end > new_origin) | |
3b41dc1a AD |
942 | scr_memsetw((void *)new_origin, vc->vc_video_erase_char, |
943 | new_scr_end - new_origin); | |
5c9228f0 | 944 | kfree(vc->vc_screenbuf); |
1da177e4 | 945 | vc->vc_screenbuf = newscreen; |
1da177e4 LT |
946 | vc->vc_screenbuf_size = new_screen_size; |
947 | set_origin(vc); | |
948 | ||
949 | /* do part of a reset_terminal() */ | |
950 | vc->vc_top = 0; | |
951 | vc->vc_bottom = vc->vc_rows; | |
952 | gotoxy(vc, vc->vc_x, vc->vc_y); | |
953 | save_cur(vc); | |
954 | ||
8c9a9dd0 AC |
955 | if (tty) { |
956 | /* Rewrite the requested winsize data with the actual | |
957 | resulting sizes */ | |
958 | struct winsize ws; | |
1da177e4 LT |
959 | memset(&ws, 0, sizeof(ws)); |
960 | ws.ws_row = vc->vc_rows; | |
961 | ws.ws_col = vc->vc_cols; | |
962 | ws.ws_ypixel = vc->vc_scan_lines; | |
fc6f6238 | 963 | tty_do_resize(tty, &ws); |
1da177e4 LT |
964 | } |
965 | ||
966 | if (CON_IS_VISIBLE(vc)) | |
967 | update_screen(vc); | |
8b92e87d | 968 | vt_event_post(VT_EVENT_RESIZE, vc->vc_num, vc->vc_num); |
1da177e4 LT |
969 | return err; |
970 | } | |
971 | ||
8c9a9dd0 AC |
972 | /** |
973 | * vc_resize - resize a VT | |
974 | * @vc: virtual console | |
975 | * @cols: columns | |
976 | * @rows: rows | |
977 | * | |
978 | * Resize a virtual console as seen from the console end of things. We | |
979 | * use the common vc_do_resize methods to update the structures. The | |
980 | * caller must hold the console sem to protect console internals and | |
8ce73264 | 981 | * vc->port.tty |
8c9a9dd0 AC |
982 | */ |
983 | ||
984 | int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int rows) | |
985 | { | |
8ce73264 | 986 | return vc_do_resize(vc->port.tty, vc, cols, rows); |
8c9a9dd0 AC |
987 | } |
988 | ||
989 | /** | |
990 | * vt_resize - resize a VT | |
991 | * @tty: tty to resize | |
8c9a9dd0 AC |
992 | * @ws: winsize attributes |
993 | * | |
994 | * Resize a virtual terminal. This is called by the tty layer as we | |
995 | * register our own handler for resizing. The mutual helper does all | |
996 | * the actual work. | |
997 | * | |
998 | * Takes the console sem and the called methods then take the tty | |
999 | * termios_mutex and the tty ctrl_lock in that order. | |
1000 | */ | |
da2bdf9a | 1001 | static int vt_resize(struct tty_struct *tty, struct winsize *ws) |
ca9bda00 | 1002 | { |
8c9a9dd0 AC |
1003 | struct vc_data *vc = tty->driver_data; |
1004 | int ret; | |
ca9bda00 AC |
1005 | |
1006 | acquire_console_sem(); | |
fc6f6238 | 1007 | ret = vc_do_resize(tty, vc, ws->ws_col, ws->ws_row); |
ca9bda00 | 1008 | release_console_sem(); |
8c9a9dd0 | 1009 | return ret; |
ca9bda00 | 1010 | } |
1da177e4 | 1011 | |
ca9bda00 | 1012 | void vc_deallocate(unsigned int currcons) |
1da177e4 LT |
1013 | { |
1014 | WARN_CONSOLE_UNLOCKED(); | |
1015 | ||
1016 | if (vc_cons_allocated(currcons)) { | |
1017 | struct vc_data *vc = vc_cons[currcons].d; | |
b293d758 | 1018 | struct vt_notifier_param param = { .vc = vc }; |
4995f8ef | 1019 | |
b293d758 | 1020 | atomic_notifier_call_chain(&vt_notifier_list, VT_DEALLOCATE, ¶m); |
4995f8ef | 1021 | vcs_remove_sysfs(currcons); |
1da177e4 | 1022 | vc->vc_sw->con_deinit(vc); |
bde0d2c9 | 1023 | put_pid(vc->vt_pid); |
d459ec0b | 1024 | module_put(vc->vc_sw->owner); |
5c9228f0 | 1025 | kfree(vc->vc_screenbuf); |
1da177e4 LT |
1026 | if (currcons >= MIN_NR_CONSOLES) |
1027 | kfree(vc); | |
1028 | vc_cons[currcons].d = NULL; | |
1029 | } | |
1030 | } | |
1031 | ||
1032 | /* | |
1033 | * VT102 emulator | |
1034 | */ | |
1035 | ||
1036 | #define set_kbd(vc, x) set_vc_kbd_mode(kbd_table + (vc)->vc_num, (x)) | |
1037 | #define clr_kbd(vc, x) clr_vc_kbd_mode(kbd_table + (vc)->vc_num, (x)) | |
1038 | #define is_kbd(vc, x) vc_kbd_mode(kbd_table + (vc)->vc_num, (x)) | |
1039 | ||
1040 | #define decarm VC_REPEAT | |
1041 | #define decckm VC_CKMODE | |
1042 | #define kbdapplic VC_APPLIC | |
1043 | #define lnm VC_CRLF | |
1044 | ||
1045 | /* | |
1046 | * this is what the terminal answers to a ESC-Z or csi0c query. | |
1047 | */ | |
1048 | #define VT100ID "\033[?1;2c" | |
1049 | #define VT102ID "\033[?6c" | |
1050 | ||
1051 | unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7, | |
1052 | 8,12,10,14, 9,13,11,15 }; | |
1053 | ||
1054 | /* the default colour table, for VGA+ colour systems */ | |
1055 | int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa, | |
1056 | 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff}; | |
1057 | int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa, | |
1058 | 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff}; | |
1059 | int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa, | |
1060 | 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff}; | |
1061 | ||
1c2bbe6a JE |
1062 | module_param_array(default_red, int, NULL, S_IRUGO | S_IWUSR); |
1063 | module_param_array(default_grn, int, NULL, S_IRUGO | S_IWUSR); | |
1064 | module_param_array(default_blu, int, NULL, S_IRUGO | S_IWUSR); | |
1065 | ||
1da177e4 LT |
1066 | /* |
1067 | * gotoxy() must verify all boundaries, because the arguments | |
1068 | * might also be negative. If the given position is out of | |
1069 | * bounds, the cursor is placed at the nearest margin. | |
1070 | */ | |
1071 | static void gotoxy(struct vc_data *vc, int new_x, int new_y) | |
1072 | { | |
1073 | int min_y, max_y; | |
1074 | ||
1075 | if (new_x < 0) | |
1076 | vc->vc_x = 0; | |
1077 | else { | |
1078 | if (new_x >= vc->vc_cols) | |
1079 | vc->vc_x = vc->vc_cols - 1; | |
1080 | else | |
1081 | vc->vc_x = new_x; | |
1082 | } | |
1083 | ||
1084 | if (vc->vc_decom) { | |
1085 | min_y = vc->vc_top; | |
1086 | max_y = vc->vc_bottom; | |
1087 | } else { | |
1088 | min_y = 0; | |
1089 | max_y = vc->vc_rows; | |
1090 | } | |
1091 | if (new_y < min_y) | |
1092 | vc->vc_y = min_y; | |
1093 | else if (new_y >= max_y) | |
1094 | vc->vc_y = max_y - 1; | |
1095 | else | |
1096 | vc->vc_y = new_y; | |
1097 | vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1); | |
1098 | vc->vc_need_wrap = 0; | |
1099 | } | |
1100 | ||
1101 | /* for absolute user moves, when decom is set */ | |
1102 | static void gotoxay(struct vc_data *vc, int new_x, int new_y) | |
1103 | { | |
1104 | gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y); | |
1105 | } | |
1106 | ||
1107 | void scrollback(struct vc_data *vc, int lines) | |
1108 | { | |
1109 | if (!lines) | |
1110 | lines = vc->vc_rows / 2; | |
1111 | scrolldelta(-lines); | |
1112 | } | |
1113 | ||
1114 | void scrollfront(struct vc_data *vc, int lines) | |
1115 | { | |
1116 | if (!lines) | |
1117 | lines = vc->vc_rows / 2; | |
1118 | scrolldelta(lines); | |
1119 | } | |
1120 | ||
1121 | static void lf(struct vc_data *vc) | |
1122 | { | |
1123 | /* don't scroll if above bottom of scrolling region, or | |
1124 | * if below scrolling region | |
1125 | */ | |
1126 | if (vc->vc_y + 1 == vc->vc_bottom) | |
1127 | scrup(vc, vc->vc_top, vc->vc_bottom, 1); | |
1128 | else if (vc->vc_y < vc->vc_rows - 1) { | |
1129 | vc->vc_y++; | |
1130 | vc->vc_pos += vc->vc_size_row; | |
1131 | } | |
1132 | vc->vc_need_wrap = 0; | |
b293d758 | 1133 | notify_write(vc, '\n'); |
1da177e4 LT |
1134 | } |
1135 | ||
1136 | static void ri(struct vc_data *vc) | |
1137 | { | |
1138 | /* don't scroll if below top of scrolling region, or | |
1139 | * if above scrolling region | |
1140 | */ | |
1141 | if (vc->vc_y == vc->vc_top) | |
1142 | scrdown(vc, vc->vc_top, vc->vc_bottom, 1); | |
1143 | else if (vc->vc_y > 0) { | |
1144 | vc->vc_y--; | |
1145 | vc->vc_pos -= vc->vc_size_row; | |
1146 | } | |
1147 | vc->vc_need_wrap = 0; | |
1148 | } | |
1149 | ||
1150 | static inline void cr(struct vc_data *vc) | |
1151 | { | |
1152 | vc->vc_pos -= vc->vc_x << 1; | |
1153 | vc->vc_need_wrap = vc->vc_x = 0; | |
b293d758 | 1154 | notify_write(vc, '\r'); |
1da177e4 LT |
1155 | } |
1156 | ||
1157 | static inline void bs(struct vc_data *vc) | |
1158 | { | |
1159 | if (vc->vc_x) { | |
1160 | vc->vc_pos -= 2; | |
1161 | vc->vc_x--; | |
1162 | vc->vc_need_wrap = 0; | |
b293d758 | 1163 | notify_write(vc, '\b'); |
1da177e4 LT |
1164 | } |
1165 | } | |
1166 | ||
1167 | static inline void del(struct vc_data *vc) | |
1168 | { | |
1169 | /* ignored */ | |
1170 | } | |
1171 | ||
1172 | static void csi_J(struct vc_data *vc, int vpar) | |
1173 | { | |
1174 | unsigned int count; | |
1175 | unsigned short * start; | |
1176 | ||
1177 | switch (vpar) { | |
1178 | case 0: /* erase from cursor to end of display */ | |
1179 | count = (vc->vc_scr_end - vc->vc_pos) >> 1; | |
1180 | start = (unsigned short *)vc->vc_pos; | |
1181 | if (DO_UPDATE(vc)) { | |
1182 | /* do in two stages */ | |
1183 | vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, | |
1184 | vc->vc_cols - vc->vc_x); | |
1185 | vc->vc_sw->con_clear(vc, vc->vc_y + 1, 0, | |
1186 | vc->vc_rows - vc->vc_y - 1, | |
1187 | vc->vc_cols); | |
1188 | } | |
1189 | break; | |
1190 | case 1: /* erase from start to cursor */ | |
1191 | count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1; | |
1192 | start = (unsigned short *)vc->vc_origin; | |
1193 | if (DO_UPDATE(vc)) { | |
1194 | /* do in two stages */ | |
1195 | vc->vc_sw->con_clear(vc, 0, 0, vc->vc_y, | |
1196 | vc->vc_cols); | |
1197 | vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1, | |
1198 | vc->vc_x + 1); | |
1199 | } | |
1200 | break; | |
1201 | case 2: /* erase whole display */ | |
1202 | count = vc->vc_cols * vc->vc_rows; | |
1203 | start = (unsigned short *)vc->vc_origin; | |
1204 | if (DO_UPDATE(vc)) | |
1205 | vc->vc_sw->con_clear(vc, 0, 0, | |
1206 | vc->vc_rows, | |
1207 | vc->vc_cols); | |
1208 | break; | |
1209 | default: | |
1210 | return; | |
1211 | } | |
1212 | scr_memsetw(start, vc->vc_video_erase_char, 2 * count); | |
1213 | vc->vc_need_wrap = 0; | |
1214 | } | |
1215 | ||
1216 | static void csi_K(struct vc_data *vc, int vpar) | |
1217 | { | |
1218 | unsigned int count; | |
1219 | unsigned short * start; | |
1220 | ||
1221 | switch (vpar) { | |
1222 | case 0: /* erase from cursor to end of line */ | |
1223 | count = vc->vc_cols - vc->vc_x; | |
1224 | start = (unsigned short *)vc->vc_pos; | |
1225 | if (DO_UPDATE(vc)) | |
1226 | vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, | |
1227 | vc->vc_cols - vc->vc_x); | |
1228 | break; | |
1229 | case 1: /* erase from start of line to cursor */ | |
1230 | start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1)); | |
1231 | count = vc->vc_x + 1; | |
1232 | if (DO_UPDATE(vc)) | |
1233 | vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1, | |
1234 | vc->vc_x + 1); | |
1235 | break; | |
1236 | case 2: /* erase whole line */ | |
1237 | start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1)); | |
1238 | count = vc->vc_cols; | |
1239 | if (DO_UPDATE(vc)) | |
1240 | vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1, | |
1241 | vc->vc_cols); | |
1242 | break; | |
1243 | default: | |
1244 | return; | |
1245 | } | |
1246 | scr_memsetw(start, vc->vc_video_erase_char, 2 * count); | |
1247 | vc->vc_need_wrap = 0; | |
1248 | } | |
1249 | ||
1250 | static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */ | |
1251 | { /* not vt100? */ | |
1252 | int count; | |
1253 | ||
1254 | if (!vpar) | |
1255 | vpar++; | |
1256 | count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar; | |
1257 | ||
1258 | scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count); | |
1259 | if (DO_UPDATE(vc)) | |
1260 | vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count); | |
1261 | vc->vc_need_wrap = 0; | |
1262 | } | |
1263 | ||
1264 | static void default_attr(struct vc_data *vc) | |
1265 | { | |
1266 | vc->vc_intensity = 1; | |
fa6ce9ab | 1267 | vc->vc_italic = 0; |
1da177e4 LT |
1268 | vc->vc_underline = 0; |
1269 | vc->vc_reverse = 0; | |
1270 | vc->vc_blink = 0; | |
1271 | vc->vc_color = vc->vc_def_color; | |
1272 | } | |
1273 | ||
1274 | /* console_sem is held */ | |
1275 | static void csi_m(struct vc_data *vc) | |
1276 | { | |
1277 | int i; | |
1278 | ||
1279 | for (i = 0; i <= vc->vc_npar; i++) | |
1280 | switch (vc->vc_par[i]) { | |
1281 | case 0: /* all attributes off */ | |
1282 | default_attr(vc); | |
1283 | break; | |
1284 | case 1: | |
1285 | vc->vc_intensity = 2; | |
1286 | break; | |
1287 | case 2: | |
1288 | vc->vc_intensity = 0; | |
1289 | break; | |
fa6ce9ab JE |
1290 | case 3: |
1291 | vc->vc_italic = 1; | |
1292 | break; | |
1da177e4 LT |
1293 | case 4: |
1294 | vc->vc_underline = 1; | |
1295 | break; | |
1296 | case 5: | |
1297 | vc->vc_blink = 1; | |
1298 | break; | |
1299 | case 7: | |
1300 | vc->vc_reverse = 1; | |
1301 | break; | |
1302 | case 10: /* ANSI X3.64-1979 (SCO-ish?) | |
1303 | * Select primary font, don't display | |
1304 | * control chars if defined, don't set | |
1305 | * bit 8 on output. | |
1306 | */ | |
1307 | vc->vc_translate = set_translate(vc->vc_charset == 0 | |
1308 | ? vc->vc_G0_charset | |
1309 | : vc->vc_G1_charset, vc); | |
1310 | vc->vc_disp_ctrl = 0; | |
1311 | vc->vc_toggle_meta = 0; | |
1312 | break; | |
1313 | case 11: /* ANSI X3.64-1979 (SCO-ish?) | |
1314 | * Select first alternate font, lets | |
1315 | * chars < 32 be displayed as ROM chars. | |
1316 | */ | |
1317 | vc->vc_translate = set_translate(IBMPC_MAP, vc); | |
1318 | vc->vc_disp_ctrl = 1; | |
1319 | vc->vc_toggle_meta = 0; | |
1320 | break; | |
1321 | case 12: /* ANSI X3.64-1979 (SCO-ish?) | |
1322 | * Select second alternate font, toggle | |
1323 | * high bit before displaying as ROM char. | |
1324 | */ | |
1325 | vc->vc_translate = set_translate(IBMPC_MAP, vc); | |
1326 | vc->vc_disp_ctrl = 1; | |
1327 | vc->vc_toggle_meta = 1; | |
1328 | break; | |
1329 | case 21: | |
1330 | case 22: | |
1331 | vc->vc_intensity = 1; | |
1332 | break; | |
fa6ce9ab JE |
1333 | case 23: |
1334 | vc->vc_italic = 0; | |
1335 | break; | |
1da177e4 LT |
1336 | case 24: |
1337 | vc->vc_underline = 0; | |
1338 | break; | |
1339 | case 25: | |
1340 | vc->vc_blink = 0; | |
1341 | break; | |
1342 | case 27: | |
1343 | vc->vc_reverse = 0; | |
1344 | break; | |
1345 | case 38: /* ANSI X3.64-1979 (SCO-ish?) | |
1346 | * Enables underscore, white foreground | |
1347 | * with white underscore (Linux - use | |
1348 | * default foreground). | |
1349 | */ | |
1350 | vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0); | |
1351 | vc->vc_underline = 1; | |
1352 | break; | |
1353 | case 39: /* ANSI X3.64-1979 (SCO-ish?) | |
1354 | * Disable underline option. | |
1355 | * Reset colour to default? It did this | |
1356 | * before... | |
1357 | */ | |
1358 | vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0); | |
1359 | vc->vc_underline = 0; | |
1360 | break; | |
1361 | case 49: | |
1362 | vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f); | |
1363 | break; | |
1364 | default: | |
1365 | if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37) | |
1366 | vc->vc_color = color_table[vc->vc_par[i] - 30] | |
1367 | | (vc->vc_color & 0xf0); | |
1368 | else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47) | |
1369 | vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4) | |
1370 | | (vc->vc_color & 0x0f); | |
1371 | break; | |
1372 | } | |
1373 | update_attr(vc); | |
1374 | } | |
1375 | ||
1376 | static void respond_string(const char *p, struct tty_struct *tty) | |
1377 | { | |
1378 | while (*p) { | |
1379 | tty_insert_flip_char(tty, *p, 0); | |
1380 | p++; | |
1381 | } | |
1382 | con_schedule_flip(tty); | |
1383 | } | |
1384 | ||
1385 | static void cursor_report(struct vc_data *vc, struct tty_struct *tty) | |
1386 | { | |
1387 | char buf[40]; | |
1388 | ||
1389 | sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1); | |
1390 | respond_string(buf, tty); | |
1391 | } | |
1392 | ||
1393 | static inline void status_report(struct tty_struct *tty) | |
1394 | { | |
1395 | respond_string("\033[0n", tty); /* Terminal ok */ | |
1396 | } | |
1397 | ||
1398 | static inline void respond_ID(struct tty_struct * tty) | |
1399 | { | |
1400 | respond_string(VT102ID, tty); | |
1401 | } | |
1402 | ||
1403 | void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry) | |
1404 | { | |
1405 | char buf[8]; | |
1406 | ||
1407 | sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx), | |
1408 | (char)('!' + mry)); | |
1409 | respond_string(buf, tty); | |
1410 | } | |
1411 | ||
1412 | /* invoked via ioctl(TIOCLINUX) and through set_selection */ | |
1413 | int mouse_reporting(void) | |
1414 | { | |
1415 | return vc_cons[fg_console].d->vc_report_mouse; | |
1416 | } | |
1417 | ||
1418 | /* console_sem is held */ | |
1419 | static void set_mode(struct vc_data *vc, int on_off) | |
1420 | { | |
1421 | int i; | |
1422 | ||
1423 | for (i = 0; i <= vc->vc_npar; i++) | |
1424 | if (vc->vc_ques) { | |
1425 | switch(vc->vc_par[i]) { /* DEC private modes set/reset */ | |
1426 | case 1: /* Cursor keys send ^[Ox/^[[x */ | |
1427 | if (on_off) | |
1428 | set_kbd(vc, decckm); | |
1429 | else | |
1430 | clr_kbd(vc, decckm); | |
1431 | break; | |
1432 | case 3: /* 80/132 mode switch unimplemented */ | |
1433 | vc->vc_deccolm = on_off; | |
1434 | #if 0 | |
1435 | vc_resize(deccolm ? 132 : 80, vc->vc_rows); | |
1436 | /* this alone does not suffice; some user mode | |
1437 | utility has to change the hardware regs */ | |
1438 | #endif | |
1439 | break; | |
1440 | case 5: /* Inverted screen on/off */ | |
1441 | if (vc->vc_decscnm != on_off) { | |
1442 | vc->vc_decscnm = on_off; | |
1443 | invert_screen(vc, 0, vc->vc_screenbuf_size, 0); | |
1444 | update_attr(vc); | |
1445 | } | |
1446 | break; | |
1447 | case 6: /* Origin relative/absolute */ | |
1448 | vc->vc_decom = on_off; | |
1449 | gotoxay(vc, 0, 0); | |
1450 | break; | |
1451 | case 7: /* Autowrap on/off */ | |
1452 | vc->vc_decawm = on_off; | |
1453 | break; | |
1454 | case 8: /* Autorepeat on/off */ | |
1455 | if (on_off) | |
1456 | set_kbd(vc, decarm); | |
1457 | else | |
1458 | clr_kbd(vc, decarm); | |
1459 | break; | |
1460 | case 9: | |
1461 | vc->vc_report_mouse = on_off ? 1 : 0; | |
1462 | break; | |
1463 | case 25: /* Cursor on/off */ | |
1464 | vc->vc_deccm = on_off; | |
1465 | break; | |
1466 | case 1000: | |
1467 | vc->vc_report_mouse = on_off ? 2 : 0; | |
1468 | break; | |
1469 | } | |
1470 | } else { | |
1471 | switch(vc->vc_par[i]) { /* ANSI modes set/reset */ | |
1472 | case 3: /* Monitor (display ctrls) */ | |
1473 | vc->vc_disp_ctrl = on_off; | |
1474 | break; | |
1475 | case 4: /* Insert Mode on/off */ | |
1476 | vc->vc_decim = on_off; | |
1477 | break; | |
1478 | case 20: /* Lf, Enter == CrLf/Lf */ | |
1479 | if (on_off) | |
1480 | set_kbd(vc, lnm); | |
1481 | else | |
1482 | clr_kbd(vc, lnm); | |
1483 | break; | |
1484 | } | |
1485 | } | |
1486 | } | |
1487 | ||
1488 | /* console_sem is held */ | |
1489 | static void setterm_command(struct vc_data *vc) | |
1490 | { | |
1491 | switch(vc->vc_par[0]) { | |
1492 | case 1: /* set color for underline mode */ | |
1493 | if (vc->vc_can_do_color && | |
1494 | vc->vc_par[1] < 16) { | |
1495 | vc->vc_ulcolor = color_table[vc->vc_par[1]]; | |
1496 | if (vc->vc_underline) | |
1497 | update_attr(vc); | |
1498 | } | |
1499 | break; | |
1500 | case 2: /* set color for half intensity mode */ | |
1501 | if (vc->vc_can_do_color && | |
1502 | vc->vc_par[1] < 16) { | |
1503 | vc->vc_halfcolor = color_table[vc->vc_par[1]]; | |
1504 | if (vc->vc_intensity == 0) | |
1505 | update_attr(vc); | |
1506 | } | |
1507 | break; | |
1508 | case 8: /* store colors as defaults */ | |
1509 | vc->vc_def_color = vc->vc_attr; | |
1510 | if (vc->vc_hi_font_mask == 0x100) | |
1511 | vc->vc_def_color >>= 1; | |
1512 | default_attr(vc); | |
1513 | update_attr(vc); | |
1514 | break; | |
1515 | case 9: /* set blanking interval */ | |
f324edc8 | 1516 | blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60; |
1da177e4 LT |
1517 | poke_blanked_console(); |
1518 | break; | |
1519 | case 10: /* set bell frequency in Hz */ | |
1520 | if (vc->vc_npar >= 1) | |
1521 | vc->vc_bell_pitch = vc->vc_par[1]; | |
1522 | else | |
1523 | vc->vc_bell_pitch = DEFAULT_BELL_PITCH; | |
1524 | break; | |
1525 | case 11: /* set bell duration in msec */ | |
1526 | if (vc->vc_npar >= 1) | |
1527 | vc->vc_bell_duration = (vc->vc_par[1] < 2000) ? | |
1528 | vc->vc_par[1] * HZ / 1000 : 0; | |
1529 | else | |
1530 | vc->vc_bell_duration = DEFAULT_BELL_DURATION; | |
1531 | break; | |
1532 | case 12: /* bring specified console to the front */ | |
1533 | if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1)) | |
1534 | set_console(vc->vc_par[1] - 1); | |
1535 | break; | |
1536 | case 13: /* unblank the screen */ | |
1537 | poke_blanked_console(); | |
1538 | break; | |
1539 | case 14: /* set vesa powerdown interval */ | |
1540 | vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ; | |
1541 | break; | |
1542 | case 15: /* activate the previous console */ | |
1543 | set_console(last_console); | |
1544 | break; | |
1545 | } | |
1546 | } | |
1547 | ||
1548 | /* console_sem is held */ | |
1549 | static void csi_at(struct vc_data *vc, unsigned int nr) | |
1550 | { | |
1551 | if (nr > vc->vc_cols - vc->vc_x) | |
1552 | nr = vc->vc_cols - vc->vc_x; | |
1553 | else if (!nr) | |
1554 | nr = 1; | |
1555 | insert_char(vc, nr); | |
1556 | } | |
1557 | ||
1558 | /* console_sem is held */ | |
1559 | static void csi_L(struct vc_data *vc, unsigned int nr) | |
1560 | { | |
1561 | if (nr > vc->vc_rows - vc->vc_y) | |
1562 | nr = vc->vc_rows - vc->vc_y; | |
1563 | else if (!nr) | |
1564 | nr = 1; | |
1565 | scrdown(vc, vc->vc_y, vc->vc_bottom, nr); | |
1566 | vc->vc_need_wrap = 0; | |
1567 | } | |
1568 | ||
1569 | /* console_sem is held */ | |
1570 | static void csi_P(struct vc_data *vc, unsigned int nr) | |
1571 | { | |
1572 | if (nr > vc->vc_cols - vc->vc_x) | |
1573 | nr = vc->vc_cols - vc->vc_x; | |
1574 | else if (!nr) | |
1575 | nr = 1; | |
1576 | delete_char(vc, nr); | |
1577 | } | |
1578 | ||
1579 | /* console_sem is held */ | |
1580 | static void csi_M(struct vc_data *vc, unsigned int nr) | |
1581 | { | |
1582 | if (nr > vc->vc_rows - vc->vc_y) | |
1583 | nr = vc->vc_rows - vc->vc_y; | |
1584 | else if (!nr) | |
1585 | nr=1; | |
1586 | scrup(vc, vc->vc_y, vc->vc_bottom, nr); | |
1587 | vc->vc_need_wrap = 0; | |
1588 | } | |
1589 | ||
1590 | /* console_sem is held (except via vc_init->reset_terminal */ | |
1591 | static void save_cur(struct vc_data *vc) | |
1592 | { | |
1593 | vc->vc_saved_x = vc->vc_x; | |
1594 | vc->vc_saved_y = vc->vc_y; | |
1595 | vc->vc_s_intensity = vc->vc_intensity; | |
fa6ce9ab | 1596 | vc->vc_s_italic = vc->vc_italic; |
1da177e4 LT |
1597 | vc->vc_s_underline = vc->vc_underline; |
1598 | vc->vc_s_blink = vc->vc_blink; | |
1599 | vc->vc_s_reverse = vc->vc_reverse; | |
1600 | vc->vc_s_charset = vc->vc_charset; | |
1601 | vc->vc_s_color = vc->vc_color; | |
1602 | vc->vc_saved_G0 = vc->vc_G0_charset; | |
1603 | vc->vc_saved_G1 = vc->vc_G1_charset; | |
1604 | } | |
1605 | ||
1606 | /* console_sem is held */ | |
1607 | static void restore_cur(struct vc_data *vc) | |
1608 | { | |
1609 | gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y); | |
1610 | vc->vc_intensity = vc->vc_s_intensity; | |
fa6ce9ab | 1611 | vc->vc_italic = vc->vc_s_italic; |
1da177e4 LT |
1612 | vc->vc_underline = vc->vc_s_underline; |
1613 | vc->vc_blink = vc->vc_s_blink; | |
1614 | vc->vc_reverse = vc->vc_s_reverse; | |
1615 | vc->vc_charset = vc->vc_s_charset; | |
1616 | vc->vc_color = vc->vc_s_color; | |
1617 | vc->vc_G0_charset = vc->vc_saved_G0; | |
1618 | vc->vc_G1_charset = vc->vc_saved_G1; | |
1619 | vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc); | |
1620 | update_attr(vc); | |
1621 | vc->vc_need_wrap = 0; | |
1622 | } | |
1623 | ||
1624 | enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey, | |
1625 | EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd, | |
1626 | ESpalette }; | |
1627 | ||
1628 | /* console_sem is held (except via vc_init()) */ | |
1629 | static void reset_terminal(struct vc_data *vc, int do_clear) | |
1630 | { | |
1631 | vc->vc_top = 0; | |
1632 | vc->vc_bottom = vc->vc_rows; | |
1633 | vc->vc_state = ESnormal; | |
1634 | vc->vc_ques = 0; | |
1635 | vc->vc_translate = set_translate(LAT1_MAP, vc); | |
1636 | vc->vc_G0_charset = LAT1_MAP; | |
1637 | vc->vc_G1_charset = GRAF_MAP; | |
1638 | vc->vc_charset = 0; | |
1639 | vc->vc_need_wrap = 0; | |
1640 | vc->vc_report_mouse = 0; | |
042f10ec | 1641 | vc->vc_utf = default_utf8; |
1da177e4 LT |
1642 | vc->vc_utf_count = 0; |
1643 | ||
1644 | vc->vc_disp_ctrl = 0; | |
1645 | vc->vc_toggle_meta = 0; | |
1646 | ||
1647 | vc->vc_decscnm = 0; | |
1648 | vc->vc_decom = 0; | |
1649 | vc->vc_decawm = 1; | |
f6c06b68 | 1650 | vc->vc_deccm = global_cursor_default; |
1da177e4 LT |
1651 | vc->vc_decim = 0; |
1652 | ||
1653 | set_kbd(vc, decarm); | |
1654 | clr_kbd(vc, decckm); | |
1655 | clr_kbd(vc, kbdapplic); | |
1656 | clr_kbd(vc, lnm); | |
1657 | kbd_table[vc->vc_num].lockstate = 0; | |
1658 | kbd_table[vc->vc_num].slockstate = 0; | |
1659 | kbd_table[vc->vc_num].ledmode = LED_SHOW_FLAGS; | |
1660 | kbd_table[vc->vc_num].ledflagstate = kbd_table[vc->vc_num].default_ledflagstate; | |
1661 | /* do not do set_leds here because this causes an endless tasklet loop | |
1662 | when the keyboard hasn't been initialized yet */ | |
1663 | ||
9ea9a886 | 1664 | vc->vc_cursor_type = cur_default; |
1da177e4 LT |
1665 | vc->vc_complement_mask = vc->vc_s_complement_mask; |
1666 | ||
1667 | default_attr(vc); | |
1668 | update_attr(vc); | |
1669 | ||
1670 | vc->vc_tab_stop[0] = 0x01010100; | |
1671 | vc->vc_tab_stop[1] = | |
1672 | vc->vc_tab_stop[2] = | |
1673 | vc->vc_tab_stop[3] = | |
a564738c WK |
1674 | vc->vc_tab_stop[4] = |
1675 | vc->vc_tab_stop[5] = | |
1676 | vc->vc_tab_stop[6] = | |
1677 | vc->vc_tab_stop[7] = 0x01010101; | |
1da177e4 LT |
1678 | |
1679 | vc->vc_bell_pitch = DEFAULT_BELL_PITCH; | |
1680 | vc->vc_bell_duration = DEFAULT_BELL_DURATION; | |
1681 | ||
1682 | gotoxy(vc, 0, 0); | |
1683 | save_cur(vc); | |
1684 | if (do_clear) | |
1685 | csi_J(vc, 2); | |
1686 | } | |
1687 | ||
1688 | /* console_sem is held */ | |
1689 | static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c) | |
1690 | { | |
1691 | /* | |
1692 | * Control characters can be used in the _middle_ | |
1693 | * of an escape sequence. | |
1694 | */ | |
1695 | switch (c) { | |
1696 | case 0: | |
1697 | return; | |
1698 | case 7: | |
1699 | if (vc->vc_bell_duration) | |
1700 | kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration); | |
1701 | return; | |
1702 | case 8: | |
1703 | bs(vc); | |
1704 | return; | |
1705 | case 9: | |
1706 | vc->vc_pos -= (vc->vc_x << 1); | |
1707 | while (vc->vc_x < vc->vc_cols - 1) { | |
1708 | vc->vc_x++; | |
1709 | if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31))) | |
1710 | break; | |
1711 | } | |
1712 | vc->vc_pos += (vc->vc_x << 1); | |
b293d758 | 1713 | notify_write(vc, '\t'); |
1da177e4 LT |
1714 | return; |
1715 | case 10: case 11: case 12: | |
1716 | lf(vc); | |
1717 | if (!is_kbd(vc, lnm)) | |
1718 | return; | |
1719 | case 13: | |
1720 | cr(vc); | |
1721 | return; | |
1722 | case 14: | |
1723 | vc->vc_charset = 1; | |
1724 | vc->vc_translate = set_translate(vc->vc_G1_charset, vc); | |
1725 | vc->vc_disp_ctrl = 1; | |
1726 | return; | |
1727 | case 15: | |
1728 | vc->vc_charset = 0; | |
1729 | vc->vc_translate = set_translate(vc->vc_G0_charset, vc); | |
1730 | vc->vc_disp_ctrl = 0; | |
1731 | return; | |
1732 | case 24: case 26: | |
1733 | vc->vc_state = ESnormal; | |
1734 | return; | |
1735 | case 27: | |
1736 | vc->vc_state = ESesc; | |
1737 | return; | |
1738 | case 127: | |
1739 | del(vc); | |
1740 | return; | |
1741 | case 128+27: | |
1742 | vc->vc_state = ESsquare; | |
1743 | return; | |
1744 | } | |
1745 | switch(vc->vc_state) { | |
1746 | case ESesc: | |
1747 | vc->vc_state = ESnormal; | |
1748 | switch (c) { | |
1749 | case '[': | |
1750 | vc->vc_state = ESsquare; | |
1751 | return; | |
1752 | case ']': | |
1753 | vc->vc_state = ESnonstd; | |
1754 | return; | |
1755 | case '%': | |
1756 | vc->vc_state = ESpercent; | |
1757 | return; | |
1758 | case 'E': | |
1759 | cr(vc); | |
1760 | lf(vc); | |
1761 | return; | |
1762 | case 'M': | |
1763 | ri(vc); | |
1764 | return; | |
1765 | case 'D': | |
1766 | lf(vc); | |
1767 | return; | |
1768 | case 'H': | |
1769 | vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31)); | |
1770 | return; | |
1771 | case 'Z': | |
1772 | respond_ID(tty); | |
1773 | return; | |
1774 | case '7': | |
1775 | save_cur(vc); | |
1776 | return; | |
1777 | case '8': | |
1778 | restore_cur(vc); | |
1779 | return; | |
1780 | case '(': | |
1781 | vc->vc_state = ESsetG0; | |
1782 | return; | |
1783 | case ')': | |
1784 | vc->vc_state = ESsetG1; | |
1785 | return; | |
1786 | case '#': | |
1787 | vc->vc_state = EShash; | |
1788 | return; | |
1789 | case 'c': | |
1790 | reset_terminal(vc, 1); | |
1791 | return; | |
1792 | case '>': /* Numeric keypad */ | |
1793 | clr_kbd(vc, kbdapplic); | |
1794 | return; | |
1795 | case '=': /* Appl. keypad */ | |
1796 | set_kbd(vc, kbdapplic); | |
1797 | return; | |
1798 | } | |
1799 | return; | |
1800 | case ESnonstd: | |
1801 | if (c=='P') { /* palette escape sequence */ | |
1802 | for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++) | |
1803 | vc->vc_par[vc->vc_npar] = 0; | |
1804 | vc->vc_npar = 0; | |
1805 | vc->vc_state = ESpalette; | |
1806 | return; | |
1807 | } else if (c=='R') { /* reset palette */ | |
1808 | reset_palette(vc); | |
1809 | vc->vc_state = ESnormal; | |
1810 | } else | |
1811 | vc->vc_state = ESnormal; | |
1812 | return; | |
1813 | case ESpalette: | |
74c807ce AS |
1814 | if (isxdigit(c)) { |
1815 | vc->vc_par[vc->vc_npar++] = hex_to_bin(c); | |
1da177e4 LT |
1816 | if (vc->vc_npar == 7) { |
1817 | int i = vc->vc_par[0] * 3, j = 1; | |
1818 | vc->vc_palette[i] = 16 * vc->vc_par[j++]; | |
1819 | vc->vc_palette[i++] += vc->vc_par[j++]; | |
1820 | vc->vc_palette[i] = 16 * vc->vc_par[j++]; | |
1821 | vc->vc_palette[i++] += vc->vc_par[j++]; | |
1822 | vc->vc_palette[i] = 16 * vc->vc_par[j++]; | |
1823 | vc->vc_palette[i] += vc->vc_par[j]; | |
1824 | set_palette(vc); | |
1825 | vc->vc_state = ESnormal; | |
1826 | } | |
1827 | } else | |
1828 | vc->vc_state = ESnormal; | |
1829 | return; | |
1830 | case ESsquare: | |
1831 | for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++) | |
1832 | vc->vc_par[vc->vc_npar] = 0; | |
1833 | vc->vc_npar = 0; | |
1834 | vc->vc_state = ESgetpars; | |
1835 | if (c == '[') { /* Function key */ | |
1836 | vc->vc_state=ESfunckey; | |
1837 | return; | |
1838 | } | |
1839 | vc->vc_ques = (c == '?'); | |
1840 | if (vc->vc_ques) | |
1841 | return; | |
1842 | case ESgetpars: | |
1843 | if (c == ';' && vc->vc_npar < NPAR - 1) { | |
1844 | vc->vc_npar++; | |
1845 | return; | |
1846 | } else if (c>='0' && c<='9') { | |
1847 | vc->vc_par[vc->vc_npar] *= 10; | |
1848 | vc->vc_par[vc->vc_npar] += c - '0'; | |
1849 | return; | |
1850 | } else | |
1851 | vc->vc_state = ESgotpars; | |
1852 | case ESgotpars: | |
1853 | vc->vc_state = ESnormal; | |
1854 | switch(c) { | |
1855 | case 'h': | |
1856 | set_mode(vc, 1); | |
1857 | return; | |
1858 | case 'l': | |
1859 | set_mode(vc, 0); | |
1860 | return; | |
1861 | case 'c': | |
1862 | if (vc->vc_ques) { | |
1863 | if (vc->vc_par[0]) | |
1864 | vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16); | |
1865 | else | |
9ea9a886 | 1866 | vc->vc_cursor_type = cur_default; |
1da177e4 LT |
1867 | return; |
1868 | } | |
1869 | break; | |
1870 | case 'm': | |
1871 | if (vc->vc_ques) { | |
1872 | clear_selection(); | |
1873 | if (vc->vc_par[0]) | |
1874 | vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1]; | |
1875 | else | |
1876 | vc->vc_complement_mask = vc->vc_s_complement_mask; | |
1877 | return; | |
1878 | } | |
1879 | break; | |
1880 | case 'n': | |
1881 | if (!vc->vc_ques) { | |
1882 | if (vc->vc_par[0] == 5) | |
1883 | status_report(tty); | |
1884 | else if (vc->vc_par[0] == 6) | |
1885 | cursor_report(vc, tty); | |
1886 | } | |
1887 | return; | |
1888 | } | |
1889 | if (vc->vc_ques) { | |
1890 | vc->vc_ques = 0; | |
1891 | return; | |
1892 | } | |
1893 | switch(c) { | |
1894 | case 'G': case '`': | |
1895 | if (vc->vc_par[0]) | |
1896 | vc->vc_par[0]--; | |
1897 | gotoxy(vc, vc->vc_par[0], vc->vc_y); | |
1898 | return; | |
1899 | case 'A': | |
1900 | if (!vc->vc_par[0]) | |
1901 | vc->vc_par[0]++; | |
1902 | gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]); | |
1903 | return; | |
1904 | case 'B': case 'e': | |
1905 | if (!vc->vc_par[0]) | |
1906 | vc->vc_par[0]++; | |
1907 | gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]); | |
1908 | return; | |
1909 | case 'C': case 'a': | |
1910 | if (!vc->vc_par[0]) | |
1911 | vc->vc_par[0]++; | |
1912 | gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y); | |
1913 | return; | |
1914 | case 'D': | |
1915 | if (!vc->vc_par[0]) | |
1916 | vc->vc_par[0]++; | |
1917 | gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y); | |
1918 | return; | |
1919 | case 'E': | |
1920 | if (!vc->vc_par[0]) | |
1921 | vc->vc_par[0]++; | |
1922 | gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]); | |
1923 | return; | |
1924 | case 'F': | |
1925 | if (!vc->vc_par[0]) | |
1926 | vc->vc_par[0]++; | |
1927 | gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]); | |
1928 | return; | |
1929 | case 'd': | |
1930 | if (vc->vc_par[0]) | |
1931 | vc->vc_par[0]--; | |
1932 | gotoxay(vc, vc->vc_x ,vc->vc_par[0]); | |
1933 | return; | |
1934 | case 'H': case 'f': | |
1935 | if (vc->vc_par[0]) | |
1936 | vc->vc_par[0]--; | |
1937 | if (vc->vc_par[1]) | |
1938 | vc->vc_par[1]--; | |
1939 | gotoxay(vc, vc->vc_par[1], vc->vc_par[0]); | |
1940 | return; | |
1941 | case 'J': | |
1942 | csi_J(vc, vc->vc_par[0]); | |
1943 | return; | |
1944 | case 'K': | |
1945 | csi_K(vc, vc->vc_par[0]); | |
1946 | return; | |
1947 | case 'L': | |
1948 | csi_L(vc, vc->vc_par[0]); | |
1949 | return; | |
1950 | case 'M': | |
1951 | csi_M(vc, vc->vc_par[0]); | |
1952 | return; | |
1953 | case 'P': | |
1954 | csi_P(vc, vc->vc_par[0]); | |
1955 | return; | |
1956 | case 'c': | |
1957 | if (!vc->vc_par[0]) | |
1958 | respond_ID(tty); | |
1959 | return; | |
1960 | case 'g': | |
1961 | if (!vc->vc_par[0]) | |
1962 | vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31)); | |
1963 | else if (vc->vc_par[0] == 3) { | |
1964 | vc->vc_tab_stop[0] = | |
1965 | vc->vc_tab_stop[1] = | |
1966 | vc->vc_tab_stop[2] = | |
1967 | vc->vc_tab_stop[3] = | |
a564738c WK |
1968 | vc->vc_tab_stop[4] = |
1969 | vc->vc_tab_stop[5] = | |
1970 | vc->vc_tab_stop[6] = | |
1971 | vc->vc_tab_stop[7] = 0; | |
1da177e4 LT |
1972 | } |
1973 | return; | |
1974 | case 'm': | |
1975 | csi_m(vc); | |
1976 | return; | |
1977 | case 'q': /* DECLL - but only 3 leds */ | |
1978 | /* map 0,1,2,3 to 0,1,2,4 */ | |
1979 | if (vc->vc_par[0] < 4) | |
1980 | setledstate(kbd_table + vc->vc_num, | |
1981 | (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4); | |
1982 | return; | |
1983 | case 'r': | |
1984 | if (!vc->vc_par[0]) | |
1985 | vc->vc_par[0]++; | |
1986 | if (!vc->vc_par[1]) | |
1987 | vc->vc_par[1] = vc->vc_rows; | |
1988 | /* Minimum allowed region is 2 lines */ | |
1989 | if (vc->vc_par[0] < vc->vc_par[1] && | |
1990 | vc->vc_par[1] <= vc->vc_rows) { | |
1991 | vc->vc_top = vc->vc_par[0] - 1; | |
1992 | vc->vc_bottom = vc->vc_par[1]; | |
1993 | gotoxay(vc, 0, 0); | |
1994 | } | |
1995 | return; | |
1996 | case 's': | |
1997 | save_cur(vc); | |
1998 | return; | |
1999 | case 'u': | |
2000 | restore_cur(vc); | |
2001 | return; | |
2002 | case 'X': | |
2003 | csi_X(vc, vc->vc_par[0]); | |
2004 | return; | |
2005 | case '@': | |
2006 | csi_at(vc, vc->vc_par[0]); | |
2007 | return; | |
2008 | case ']': /* setterm functions */ | |
2009 | setterm_command(vc); | |
2010 | return; | |
2011 | } | |
2012 | return; | |
2013 | case ESpercent: | |
2014 | vc->vc_state = ESnormal; | |
2015 | switch (c) { | |
2016 | case '@': /* defined in ISO 2022 */ | |
2017 | vc->vc_utf = 0; | |
2018 | return; | |
2019 | case 'G': /* prelim official escape code */ | |
2020 | case '8': /* retained for compatibility */ | |
2021 | vc->vc_utf = 1; | |
2022 | return; | |
2023 | } | |
2024 | return; | |
2025 | case ESfunckey: | |
2026 | vc->vc_state = ESnormal; | |
2027 | return; | |
2028 | case EShash: | |
2029 | vc->vc_state = ESnormal; | |
2030 | if (c == '8') { | |
2031 | /* DEC screen alignment test. kludge :-) */ | |
2032 | vc->vc_video_erase_char = | |
2033 | (vc->vc_video_erase_char & 0xff00) | 'E'; | |
2034 | csi_J(vc, 2); | |
2035 | vc->vc_video_erase_char = | |
2036 | (vc->vc_video_erase_char & 0xff00) | ' '; | |
2037 | do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2); | |
2038 | } | |
2039 | return; | |
2040 | case ESsetG0: | |
2041 | if (c == '0') | |
2042 | vc->vc_G0_charset = GRAF_MAP; | |
2043 | else if (c == 'B') | |
2044 | vc->vc_G0_charset = LAT1_MAP; | |
2045 | else if (c == 'U') | |
2046 | vc->vc_G0_charset = IBMPC_MAP; | |
2047 | else if (c == 'K') | |
2048 | vc->vc_G0_charset = USER_MAP; | |
2049 | if (vc->vc_charset == 0) | |
2050 | vc->vc_translate = set_translate(vc->vc_G0_charset, vc); | |
2051 | vc->vc_state = ESnormal; | |
2052 | return; | |
2053 | case ESsetG1: | |
2054 | if (c == '0') | |
2055 | vc->vc_G1_charset = GRAF_MAP; | |
2056 | else if (c == 'B') | |
2057 | vc->vc_G1_charset = LAT1_MAP; | |
2058 | else if (c == 'U') | |
2059 | vc->vc_G1_charset = IBMPC_MAP; | |
2060 | else if (c == 'K') | |
2061 | vc->vc_G1_charset = USER_MAP; | |
2062 | if (vc->vc_charset == 1) | |
2063 | vc->vc_translate = set_translate(vc->vc_G1_charset, vc); | |
2064 | vc->vc_state = ESnormal; | |
2065 | return; | |
2066 | default: | |
2067 | vc->vc_state = ESnormal; | |
2068 | } | |
2069 | } | |
2070 | ||
2071 | /* This is a temporary buffer used to prepare a tty console write | |
2072 | * so that we can easily avoid touching user space while holding the | |
2073 | * console spinlock. It is allocated in con_init and is shared by | |
2074 | * this code and the vc_screen read/write tty calls. | |
2075 | * | |
2076 | * We have to allocate this statically in the kernel data section | |
2077 | * since console_init (and thus con_init) are called before any | |
2078 | * kernel memory allocation is available. | |
2079 | */ | |
2080 | char con_buf[CON_BUF_SIZE]; | |
c831c338 | 2081 | DEFINE_MUTEX(con_buf_mtx); |
1da177e4 | 2082 | |
2f1a2ccb | 2083 | /* is_double_width() is based on the wcwidth() implementation by |
1ed8a2b3 | 2084 | * Markus Kuhn -- 2007-05-26 (Unicode 5.0) |
2f1a2ccb EK |
2085 | * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c |
2086 | */ | |
2087 | struct interval { | |
2088 | uint32_t first; | |
2089 | uint32_t last; | |
2090 | }; | |
2091 | ||
2092 | static int bisearch(uint32_t ucs, const struct interval *table, int max) | |
2093 | { | |
2094 | int min = 0; | |
2095 | int mid; | |
2096 | ||
2097 | if (ucs < table[0].first || ucs > table[max].last) | |
2098 | return 0; | |
2099 | while (max >= min) { | |
2100 | mid = (min + max) / 2; | |
2101 | if (ucs > table[mid].last) | |
2102 | min = mid + 1; | |
2103 | else if (ucs < table[mid].first) | |
2104 | max = mid - 1; | |
2105 | else | |
2106 | return 1; | |
2107 | } | |
2108 | return 0; | |
2109 | } | |
2110 | ||
2111 | static int is_double_width(uint32_t ucs) | |
2112 | { | |
2113 | static const struct interval double_width[] = { | |
2114 | { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E }, | |
2115 | { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF }, | |
1ed8a2b3 EK |
2116 | { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 }, |
2117 | { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD } | |
2f1a2ccb | 2118 | }; |
0f11541b | 2119 | return bisearch(ucs, double_width, ARRAY_SIZE(double_width) - 1); |
2f1a2ccb EK |
2120 | } |
2121 | ||
1da177e4 LT |
2122 | /* acquires console_sem */ |
2123 | static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count) | |
2124 | { | |
2125 | #ifdef VT_BUF_VRAM_ONLY | |
2126 | #define FLUSH do { } while(0); | |
2127 | #else | |
2128 | #define FLUSH if (draw_x >= 0) { \ | |
2129 | vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \ | |
2130 | draw_x = -1; \ | |
2131 | } | |
2132 | #endif | |
2133 | ||
2134 | int c, tc, ok, n = 0, draw_x = -1; | |
2135 | unsigned int currcons; | |
2136 | unsigned long draw_from = 0, draw_to = 0; | |
2137 | struct vc_data *vc; | |
2f1a2ccb | 2138 | unsigned char vc_attr; |
0341a4d0 | 2139 | struct vt_notifier_param param; |
2f1a2ccb EK |
2140 | uint8_t rescan; |
2141 | uint8_t inverse; | |
2142 | uint8_t width; | |
1da177e4 | 2143 | u16 himask, charmask; |
1da177e4 LT |
2144 | |
2145 | if (in_interrupt()) | |
2146 | return count; | |
2147 | ||
2148 | might_sleep(); | |
2149 | ||
2150 | acquire_console_sem(); | |
2151 | vc = tty->driver_data; | |
2152 | if (vc == NULL) { | |
2153 | printk(KERN_ERR "vt: argh, driver_data is NULL !\n"); | |
2154 | release_console_sem(); | |
2155 | return 0; | |
2156 | } | |
2157 | ||
2158 | currcons = vc->vc_num; | |
2159 | if (!vc_cons_allocated(currcons)) { | |
2160 | /* could this happen? */ | |
9074d963 | 2161 | printk_once("con_write: tty %d not allocated\n", currcons+1); |
1da177e4 LT |
2162 | release_console_sem(); |
2163 | return 0; | |
2164 | } | |
1da177e4 | 2165 | |
1da177e4 LT |
2166 | himask = vc->vc_hi_font_mask; |
2167 | charmask = himask ? 0x1ff : 0xff; | |
2168 | ||
2169 | /* undraw cursor first */ | |
2170 | if (IS_FG(vc)) | |
2171 | hide_cursor(vc); | |
2172 | ||
0341a4d0 KD |
2173 | param.vc = vc; |
2174 | ||
1da177e4 LT |
2175 | while (!tty->stopped && count) { |
2176 | int orig = *buf; | |
2177 | c = orig; | |
2178 | buf++; | |
2179 | n++; | |
2180 | count--; | |
2f1a2ccb EK |
2181 | rescan = 0; |
2182 | inverse = 0; | |
2183 | width = 1; | |
1da177e4 LT |
2184 | |
2185 | /* Do no translation at all in control states */ | |
2186 | if (vc->vc_state != ESnormal) { | |
2187 | tc = c; | |
d4328b40 | 2188 | } else if (vc->vc_utf && !vc->vc_disp_ctrl) { |
2f1a2ccb EK |
2189 | /* Combine UTF-8 into Unicode in vc_utf_char. |
2190 | * vc_utf_count is the number of continuation bytes still | |
2191 | * expected to arrive. | |
2192 | * vc_npar is the number of continuation bytes arrived so | |
2193 | * far | |
2194 | */ | |
d4328b40 | 2195 | rescan_last_byte: |
2f1a2ccb EK |
2196 | if ((c & 0xc0) == 0x80) { |
2197 | /* Continuation byte received */ | |
2198 | static const uint32_t utf8_length_changes[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff }; | |
d4328b40 | 2199 | if (vc->vc_utf_count) { |
2f1a2ccb EK |
2200 | vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f); |
2201 | vc->vc_npar++; | |
2202 | if (--vc->vc_utf_count) { | |
2203 | /* Still need some bytes */ | |
1da177e4 | 2204 | continue; |
2f1a2ccb EK |
2205 | } |
2206 | /* Got a whole character */ | |
2207 | c = vc->vc_utf_char; | |
2208 | /* Reject overlong sequences */ | |
2209 | if (c <= utf8_length_changes[vc->vc_npar - 1] || | |
2210 | c > utf8_length_changes[vc->vc_npar]) | |
2211 | c = 0xfffd; | |
2212 | } else { | |
2213 | /* Unexpected continuation byte */ | |
2214 | vc->vc_utf_count = 0; | |
2215 | c = 0xfffd; | |
2216 | } | |
1da177e4 | 2217 | } else { |
2f1a2ccb EK |
2218 | /* Single ASCII byte or first byte of a sequence received */ |
2219 | if (vc->vc_utf_count) { | |
2220 | /* Continuation byte expected */ | |
2221 | rescan = 1; | |
2222 | vc->vc_utf_count = 0; | |
2223 | c = 0xfffd; | |
2224 | } else if (c > 0x7f) { | |
2225 | /* First byte of a multibyte sequence received */ | |
2226 | vc->vc_npar = 0; | |
2227 | if ((c & 0xe0) == 0xc0) { | |
2228 | vc->vc_utf_count = 1; | |
2229 | vc->vc_utf_char = (c & 0x1f); | |
2230 | } else if ((c & 0xf0) == 0xe0) { | |
2231 | vc->vc_utf_count = 2; | |
2232 | vc->vc_utf_char = (c & 0x0f); | |
2233 | } else if ((c & 0xf8) == 0xf0) { | |
2234 | vc->vc_utf_count = 3; | |
2235 | vc->vc_utf_char = (c & 0x07); | |
2236 | } else if ((c & 0xfc) == 0xf8) { | |
2237 | vc->vc_utf_count = 4; | |
2238 | vc->vc_utf_char = (c & 0x03); | |
2239 | } else if ((c & 0xfe) == 0xfc) { | |
2240 | vc->vc_utf_count = 5; | |
2241 | vc->vc_utf_char = (c & 0x01); | |
2242 | } else { | |
2243 | /* 254 and 255 are invalid */ | |
2244 | c = 0xfffd; | |
2245 | } | |
2246 | if (vc->vc_utf_count) { | |
2247 | /* Still need some bytes */ | |
2248 | continue; | |
2249 | } | |
2250 | } | |
2251 | /* Nothing to do if an ASCII byte was received */ | |
1da177e4 | 2252 | } |
2f1a2ccb EK |
2253 | /* End of UTF-8 decoding. */ |
2254 | /* c is the received character, or U+FFFD for invalid sequences. */ | |
2255 | /* Replace invalid Unicode code points with U+FFFD too */ | |
2256 | if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff) | |
2257 | c = 0xfffd; | |
2258 | tc = c; | |
d4328b40 | 2259 | } else { /* no utf or alternate charset mode */ |
a29ccf6f | 2260 | tc = vc_translate(vc, c); |
1da177e4 LT |
2261 | } |
2262 | ||
0341a4d0 KD |
2263 | param.c = tc; |
2264 | if (atomic_notifier_call_chain(&vt_notifier_list, VT_PREWRITE, | |
2265 | ¶m) == NOTIFY_STOP) | |
2266 | continue; | |
2267 | ||
1da177e4 LT |
2268 | /* If the original code was a control character we |
2269 | * only allow a glyph to be displayed if the code is | |
2270 | * not normally used (such as for cursor movement) or | |
2271 | * if the disp_ctrl mode has been explicitly enabled. | |
2272 | * Certain characters (as given by the CTRL_ALWAYS | |
2273 | * bitmap) are always displayed as control characters, | |
2274 | * as the console would be pretty useless without | |
2275 | * them; to display an arbitrary font position use the | |
2276 | * direct-to-font zone in UTF-8 mode. | |
2277 | */ | |
2278 | ok = tc && (c >= 32 || | |
d4328b40 AT |
2279 | !(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 : |
2280 | vc->vc_utf || ((CTRL_ACTION >> c) & 1))) | |
1da177e4 LT |
2281 | && (c != 127 || vc->vc_disp_ctrl) |
2282 | && (c != 128+27); | |
2283 | ||
2284 | if (vc->vc_state == ESnormal && ok) { | |
2f1a2ccb EK |
2285 | if (vc->vc_utf && !vc->vc_disp_ctrl) { |
2286 | if (is_double_width(c)) | |
2287 | width = 2; | |
2288 | } | |
1da177e4 LT |
2289 | /* Now try to find out how to display it */ |
2290 | tc = conv_uni_to_pc(vc, tc); | |
d4328b40 | 2291 | if (tc & ~charmask) { |
2f1a2ccb EK |
2292 | if (tc == -1 || tc == -2) { |
2293 | continue; /* nothing to display */ | |
2294 | } | |
2295 | /* Glyph not found */ | |
c0b79882 | 2296 | if ((!(vc->vc_utf && !vc->vc_disp_ctrl) || c < 128) && !(c & ~charmask)) { |
2f1a2ccb | 2297 | /* In legacy mode use the glyph we get by a 1:1 mapping. |
1ed8a2b3 EK |
2298 | This would make absolutely no sense with Unicode in mind, |
2299 | but do this for ASCII characters since a font may lack | |
2300 | Unicode mapping info and we don't want to end up with | |
2301 | having question marks only. */ | |
2f1a2ccb EK |
2302 | tc = c; |
2303 | } else { | |
2304 | /* Display U+FFFD. If it's not found, display an inverse question mark. */ | |
2305 | tc = conv_uni_to_pc(vc, 0xfffd); | |
2306 | if (tc < 0) { | |
2307 | inverse = 1; | |
2308 | tc = conv_uni_to_pc(vc, '?'); | |
2309 | if (tc < 0) tc = '?'; | |
2310 | } | |
2311 | } | |
d4328b40 | 2312 | } |
1da177e4 | 2313 | |
2f1a2ccb EK |
2314 | if (!inverse) { |
2315 | vc_attr = vc->vc_attr; | |
1da177e4 | 2316 | } else { |
2f1a2ccb EK |
2317 | /* invert vc_attr */ |
2318 | if (!vc->vc_can_do_color) { | |
2319 | vc_attr = (vc->vc_attr) ^ 0x08; | |
2320 | } else if (vc->vc_hi_font_mask == 0x100) { | |
2321 | vc_attr = ((vc->vc_attr) & 0x11) | (((vc->vc_attr) & 0xe0) >> 4) | (((vc->vc_attr) & 0x0e) << 4); | |
2322 | } else { | |
2323 | vc_attr = ((vc->vc_attr) & 0x88) | (((vc->vc_attr) & 0x70) >> 4) | (((vc->vc_attr) & 0x07) << 4); | |
2324 | } | |
1ed8a2b3 | 2325 | FLUSH |
1da177e4 | 2326 | } |
2f1a2ccb EK |
2327 | |
2328 | while (1) { | |
2329 | if (vc->vc_need_wrap || vc->vc_decim) | |
2330 | FLUSH | |
2331 | if (vc->vc_need_wrap) { | |
2332 | cr(vc); | |
2333 | lf(vc); | |
2334 | } | |
2335 | if (vc->vc_decim) | |
2336 | insert_char(vc, 1); | |
2337 | scr_writew(himask ? | |
2338 | ((vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) : | |
2339 | (vc_attr << 8) + tc, | |
2340 | (u16 *) vc->vc_pos); | |
2341 | if (DO_UPDATE(vc) && draw_x < 0) { | |
2342 | draw_x = vc->vc_x; | |
2343 | draw_from = vc->vc_pos; | |
2344 | } | |
2345 | if (vc->vc_x == vc->vc_cols - 1) { | |
2346 | vc->vc_need_wrap = vc->vc_decawm; | |
2347 | draw_to = vc->vc_pos + 2; | |
2348 | } else { | |
2349 | vc->vc_x++; | |
2350 | draw_to = (vc->vc_pos += 2); | |
d4328b40 | 2351 | } |
2f1a2ccb EK |
2352 | |
2353 | if (!--width) break; | |
2354 | ||
2355 | tc = conv_uni_to_pc(vc, ' '); /* A space is printed in the second column */ | |
2356 | if (tc < 0) tc = ' '; | |
2357 | } | |
b293d758 | 2358 | notify_write(vc, c); |
2f1a2ccb | 2359 | |
1ed8a2b3 EK |
2360 | if (inverse) { |
2361 | FLUSH | |
2362 | } | |
2363 | ||
2f1a2ccb EK |
2364 | if (rescan) { |
2365 | rescan = 0; | |
2366 | inverse = 0; | |
2367 | width = 1; | |
d4328b40 AT |
2368 | c = orig; |
2369 | goto rescan_last_byte; | |
2370 | } | |
1da177e4 LT |
2371 | continue; |
2372 | } | |
2373 | FLUSH | |
2374 | do_con_trol(tty, vc, orig); | |
2375 | } | |
2376 | FLUSH | |
2377 | console_conditional_schedule(); | |
2378 | release_console_sem(); | |
b293d758 | 2379 | notify_update(vc); |
1da177e4 LT |
2380 | return n; |
2381 | #undef FLUSH | |
2382 | } | |
2383 | ||
2384 | /* | |
2385 | * This is the console switching callback. | |
2386 | * | |
2387 | * Doing console switching in a process context allows | |
2388 | * us to do the switches asynchronously (needed when we want | |
2389 | * to switch due to a keyboard interrupt). Synchronization | |
2390 | * with other console code and prevention of re-entrancy is | |
2391 | * ensured with console_sem. | |
2392 | */ | |
65f27f38 | 2393 | static void console_callback(struct work_struct *ignored) |
1da177e4 LT |
2394 | { |
2395 | acquire_console_sem(); | |
2396 | ||
2397 | if (want_console >= 0) { | |
2398 | if (want_console != fg_console && | |
2399 | vc_cons_allocated(want_console)) { | |
2400 | hide_cursor(vc_cons[fg_console].d); | |
2401 | change_console(vc_cons[want_console].d); | |
2402 | /* we only changed when the console had already | |
2403 | been allocated - a new console is not created | |
2404 | in an interrupt routine */ | |
2405 | } | |
2406 | want_console = -1; | |
2407 | } | |
2408 | if (do_poke_blanked_console) { /* do not unblank for a LED change */ | |
2409 | do_poke_blanked_console = 0; | |
2410 | poke_blanked_console(); | |
2411 | } | |
2412 | if (scrollback_delta) { | |
2413 | struct vc_data *vc = vc_cons[fg_console].d; | |
2414 | clear_selection(); | |
2415 | if (vc->vc_mode == KD_TEXT) | |
2416 | vc->vc_sw->con_scrolldelta(vc, scrollback_delta); | |
2417 | scrollback_delta = 0; | |
2418 | } | |
2419 | if (blank_timer_expired) { | |
2420 | do_blank_screen(0); | |
2421 | blank_timer_expired = 0; | |
2422 | } | |
b293d758 | 2423 | notify_update(vc_cons[fg_console].d); |
1da177e4 LT |
2424 | |
2425 | release_console_sem(); | |
2426 | } | |
2427 | ||
b257bc05 | 2428 | int set_console(int nr) |
1da177e4 | 2429 | { |
b257bc05 AJ |
2430 | struct vc_data *vc = vc_cons[fg_console].d; |
2431 | ||
2432 | if (!vc_cons_allocated(nr) || vt_dont_switch || | |
2433 | (vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) { | |
2434 | ||
2435 | /* | |
2436 | * Console switch will fail in console_callback() or | |
2437 | * change_console() so there is no point scheduling | |
2438 | * the callback | |
2439 | * | |
2440 | * Existing set_console() users don't check the return | |
2441 | * value so this shouldn't break anything | |
2442 | */ | |
2443 | return -EINVAL; | |
2444 | } | |
2445 | ||
1da177e4 LT |
2446 | want_console = nr; |
2447 | schedule_console_callback(); | |
b257bc05 AJ |
2448 | |
2449 | return 0; | |
1da177e4 LT |
2450 | } |
2451 | ||
2452 | struct tty_driver *console_driver; | |
2453 | ||
2454 | #ifdef CONFIG_VT_CONSOLE | |
2455 | ||
5ada918b BW |
2456 | /** |
2457 | * vt_kmsg_redirect() - Sets/gets the kernel message console | |
2458 | * @new: The new virtual terminal number or -1 if the console should stay | |
2459 | * unchanged | |
2460 | * | |
2461 | * By default, the kernel messages are always printed on the current virtual | |
2462 | * console. However, the user may modify that default with the | |
2463 | * TIOCL_SETKMSGREDIRECT ioctl call. | |
2464 | * | |
2465 | * This function sets the kernel message console to be @new. It returns the old | |
2466 | * virtual console number. The virtual terminal number 0 (both as parameter and | |
2467 | * return value) means no redirection (i.e. always printed on the currently | |
2468 | * active console). | |
2469 | * | |
2470 | * The parameter -1 means that only the current console is returned, but the | |
2471 | * value is not modified. You may use the macro vt_get_kmsg_redirect() in that | |
2472 | * case to make the code more understandable. | |
2473 | * | |
2474 | * When the kernel is compiled without CONFIG_VT_CONSOLE, this function ignores | |
2475 | * the parameter and always returns 0. | |
2476 | */ | |
2477 | int vt_kmsg_redirect(int new) | |
2478 | { | |
2479 | static int kmsg_con; | |
2480 | ||
2481 | if (new != -1) | |
2482 | return xchg(&kmsg_con, new); | |
2483 | else | |
2484 | return kmsg_con; | |
2485 | } | |
2486 | ||
1da177e4 LT |
2487 | /* |
2488 | * Console on virtual terminal | |
2489 | * | |
2490 | * The console must be locked when we get here. | |
2491 | */ | |
2492 | ||
2493 | static void vt_console_print(struct console *co, const char *b, unsigned count) | |
2494 | { | |
2495 | struct vc_data *vc = vc_cons[fg_console].d; | |
2496 | unsigned char c; | |
b0940003 | 2497 | static DEFINE_SPINLOCK(printing_lock); |
1da177e4 LT |
2498 | const ushort *start; |
2499 | ushort cnt = 0; | |
2500 | ushort myx; | |
5ada918b | 2501 | int kmsg_console; |
1da177e4 LT |
2502 | |
2503 | /* console busy or not yet initialized */ | |
b0940003 NP |
2504 | if (!printable) |
2505 | return; | |
2506 | if (!spin_trylock(&printing_lock)) | |
1da177e4 LT |
2507 | return; |
2508 | ||
5ada918b BW |
2509 | kmsg_console = vt_get_kmsg_redirect(); |
2510 | if (kmsg_console && vc_cons_allocated(kmsg_console - 1)) | |
2511 | vc = vc_cons[kmsg_console - 1].d; | |
1da177e4 LT |
2512 | |
2513 | /* read `x' only after setting currcons properly (otherwise | |
2514 | the `x' macro will read the x of the foreground console). */ | |
2515 | myx = vc->vc_x; | |
2516 | ||
2517 | if (!vc_cons_allocated(fg_console)) { | |
2518 | /* impossible */ | |
2519 | /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */ | |
2520 | goto quit; | |
2521 | } | |
2522 | ||
8fd4bd22 | 2523 | if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc)) |
1da177e4 LT |
2524 | goto quit; |
2525 | ||
2526 | /* undraw cursor first */ | |
2527 | if (IS_FG(vc)) | |
2528 | hide_cursor(vc); | |
2529 | ||
2530 | start = (ushort *)vc->vc_pos; | |
2531 | ||
2532 | /* Contrived structure to try to emulate original need_wrap behaviour | |
2533 | * Problems caused when we have need_wrap set on '\n' character */ | |
2534 | while (count--) { | |
2535 | c = *b++; | |
2536 | if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) { | |
2537 | if (cnt > 0) { | |
2538 | if (CON_IS_VISIBLE(vc)) | |
2539 | vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x); | |
2540 | vc->vc_x += cnt; | |
2541 | if (vc->vc_need_wrap) | |
2542 | vc->vc_x--; | |
2543 | cnt = 0; | |
2544 | } | |
2545 | if (c == 8) { /* backspace */ | |
2546 | bs(vc); | |
2547 | start = (ushort *)vc->vc_pos; | |
2548 | myx = vc->vc_x; | |
2549 | continue; | |
2550 | } | |
2551 | if (c != 13) | |
2552 | lf(vc); | |
2553 | cr(vc); | |
2554 | start = (ushort *)vc->vc_pos; | |
2555 | myx = vc->vc_x; | |
2556 | if (c == 10 || c == 13) | |
2557 | continue; | |
2558 | } | |
2559 | scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos); | |
b293d758 | 2560 | notify_write(vc, c); |
1da177e4 LT |
2561 | cnt++; |
2562 | if (myx == vc->vc_cols - 1) { | |
2563 | vc->vc_need_wrap = 1; | |
2564 | continue; | |
2565 | } | |
2566 | vc->vc_pos += 2; | |
2567 | myx++; | |
2568 | } | |
2569 | if (cnt > 0) { | |
2570 | if (CON_IS_VISIBLE(vc)) | |
2571 | vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x); | |
2572 | vc->vc_x += cnt; | |
2573 | if (vc->vc_x == vc->vc_cols) { | |
2574 | vc->vc_x--; | |
2575 | vc->vc_need_wrap = 1; | |
2576 | } | |
2577 | } | |
2578 | set_cursor(vc); | |
b293d758 | 2579 | notify_update(vc); |
1da177e4 LT |
2580 | |
2581 | quit: | |
b0940003 | 2582 | spin_unlock(&printing_lock); |
1da177e4 LT |
2583 | } |
2584 | ||
2585 | static struct tty_driver *vt_console_device(struct console *c, int *index) | |
2586 | { | |
2587 | *index = c->index ? c->index-1 : fg_console; | |
2588 | return console_driver; | |
2589 | } | |
2590 | ||
2591 | static struct console vt_console_driver = { | |
2592 | .name = "tty", | |
2593 | .write = vt_console_print, | |
2594 | .device = vt_console_device, | |
2595 | .unblank = unblank_screen, | |
2596 | .flags = CON_PRINTBUFFER, | |
2597 | .index = -1, | |
2598 | }; | |
2599 | #endif | |
2600 | ||
2601 | /* | |
2602 | * Handling of Linux-specific VC ioctls | |
2603 | */ | |
2604 | ||
2605 | /* | |
2606 | * Generally a bit racy with respect to console_sem(). | |
2607 | * | |
2608 | * There are some functions which don't need it. | |
2609 | * | |
2610 | * There are some functions which can sleep for arbitrary periods | |
2611 | * (paste_selection) but we don't need the lock there anyway. | |
2612 | * | |
2613 | * set_selection has locking, and definitely needs it | |
2614 | */ | |
2615 | ||
2616 | int tioclinux(struct tty_struct *tty, unsigned long arg) | |
2617 | { | |
2618 | char type, data; | |
2619 | char __user *p = (char __user *)arg; | |
2620 | int lines; | |
2621 | int ret; | |
2622 | ||
1da177e4 LT |
2623 | if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN)) |
2624 | return -EPERM; | |
2625 | if (get_user(type, p)) | |
2626 | return -EFAULT; | |
2627 | ret = 0; | |
04f378b1 | 2628 | |
1da177e4 LT |
2629 | switch (type) |
2630 | { | |
2631 | case TIOCL_SETSEL: | |
2632 | acquire_console_sem(); | |
2633 | ret = set_selection((struct tiocl_selection __user *)(p+1), tty); | |
2634 | release_console_sem(); | |
2635 | break; | |
2636 | case TIOCL_PASTESEL: | |
2637 | ret = paste_selection(tty); | |
2638 | break; | |
2639 | case TIOCL_UNBLANKSCREEN: | |
2d237c63 | 2640 | acquire_console_sem(); |
1da177e4 | 2641 | unblank_screen(); |
2d237c63 | 2642 | release_console_sem(); |
1da177e4 LT |
2643 | break; |
2644 | case TIOCL_SELLOADLUT: | |
2645 | ret = sel_loadlut(p); | |
2646 | break; | |
2647 | case TIOCL_GETSHIFTSTATE: | |
04f378b1 | 2648 | |
1da177e4 LT |
2649 | /* |
2650 | * Make it possible to react to Shift+Mousebutton. | |
2651 | * Note that 'shift_state' is an undocumented | |
2652 | * kernel-internal variable; programs not closely | |
2653 | * related to the kernel should not use this. | |
2654 | */ | |
2655 | data = shift_state; | |
2656 | ret = __put_user(data, p); | |
2657 | break; | |
2658 | case TIOCL_GETMOUSEREPORTING: | |
2659 | data = mouse_reporting(); | |
2660 | ret = __put_user(data, p); | |
2661 | break; | |
2662 | case TIOCL_SETVESABLANK: | |
403aac96 | 2663 | ret = set_vesa_blanking(p); |
1da177e4 | 2664 | break; |
0ca07731 | 2665 | case TIOCL_GETKMSGREDIRECT: |
5ada918b | 2666 | data = vt_get_kmsg_redirect(); |
0ca07731 RW |
2667 | ret = __put_user(data, p); |
2668 | break; | |
1da177e4 LT |
2669 | case TIOCL_SETKMSGREDIRECT: |
2670 | if (!capable(CAP_SYS_ADMIN)) { | |
2671 | ret = -EPERM; | |
2672 | } else { | |
2673 | if (get_user(data, p+1)) | |
2674 | ret = -EFAULT; | |
2675 | else | |
5ada918b | 2676 | vt_kmsg_redirect(data); |
1da177e4 LT |
2677 | } |
2678 | break; | |
2679 | case TIOCL_GETFGCONSOLE: | |
2680 | ret = fg_console; | |
2681 | break; | |
2682 | case TIOCL_SCROLLCONSOLE: | |
2683 | if (get_user(lines, (s32 __user *)(p+4))) { | |
2684 | ret = -EFAULT; | |
2685 | } else { | |
2686 | scrollfront(vc_cons[fg_console].d, lines); | |
2687 | ret = 0; | |
2688 | } | |
2689 | break; | |
2690 | case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */ | |
2d237c63 | 2691 | acquire_console_sem(); |
1da177e4 LT |
2692 | ignore_poke = 1; |
2693 | do_blank_screen(0); | |
2d237c63 | 2694 | release_console_sem(); |
1da177e4 LT |
2695 | break; |
2696 | case TIOCL_BLANKEDSCREEN: | |
2697 | ret = console_blanked; | |
2698 | break; | |
2699 | default: | |
2700 | ret = -EINVAL; | |
2701 | break; | |
2702 | } | |
2703 | return ret; | |
2704 | } | |
2705 | ||
2706 | /* | |
2707 | * /dev/ttyN handling | |
2708 | */ | |
2709 | ||
2710 | static int con_write(struct tty_struct *tty, const unsigned char *buf, int count) | |
2711 | { | |
2712 | int retval; | |
2713 | ||
2714 | retval = do_con_write(tty, buf, count); | |
2715 | con_flush_chars(tty); | |
2716 | ||
2717 | return retval; | |
2718 | } | |
2719 | ||
5d19f546 | 2720 | static int con_put_char(struct tty_struct *tty, unsigned char ch) |
1da177e4 LT |
2721 | { |
2722 | if (in_interrupt()) | |
5d19f546 AC |
2723 | return 0; /* n_r3964 calls put_char() from interrupt context */ |
2724 | return do_con_write(tty, &ch, 1); | |
1da177e4 LT |
2725 | } |
2726 | ||
2727 | static int con_write_room(struct tty_struct *tty) | |
2728 | { | |
2729 | if (tty->stopped) | |
2730 | return 0; | |
a88a69c9 | 2731 | return 32768; /* No limit, really; we're not buffering */ |
1da177e4 LT |
2732 | } |
2733 | ||
2734 | static int con_chars_in_buffer(struct tty_struct *tty) | |
2735 | { | |
2736 | return 0; /* we're not buffering */ | |
2737 | } | |
2738 | ||
2739 | /* | |
2740 | * con_throttle and con_unthrottle are only used for | |
2741 | * paste_selection(), which has to stuff in a large number of | |
2742 | * characters... | |
2743 | */ | |
2744 | static void con_throttle(struct tty_struct *tty) | |
2745 | { | |
2746 | } | |
2747 | ||
2748 | static void con_unthrottle(struct tty_struct *tty) | |
2749 | { | |
2750 | struct vc_data *vc = tty->driver_data; | |
2751 | ||
2752 | wake_up_interruptible(&vc->paste_wait); | |
2753 | } | |
2754 | ||
2755 | /* | |
2756 | * Turn the Scroll-Lock LED on when the tty is stopped | |
2757 | */ | |
2758 | static void con_stop(struct tty_struct *tty) | |
2759 | { | |
2760 | int console_num; | |
2761 | if (!tty) | |
2762 | return; | |
2763 | console_num = tty->index; | |
2764 | if (!vc_cons_allocated(console_num)) | |
2765 | return; | |
2766 | set_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK); | |
2767 | set_leds(); | |
2768 | } | |
2769 | ||
2770 | /* | |
2771 | * Turn the Scroll-Lock LED off when the console is started | |
2772 | */ | |
2773 | static void con_start(struct tty_struct *tty) | |
2774 | { | |
2775 | int console_num; | |
2776 | if (!tty) | |
2777 | return; | |
2778 | console_num = tty->index; | |
2779 | if (!vc_cons_allocated(console_num)) | |
2780 | return; | |
2781 | clr_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK); | |
2782 | set_leds(); | |
2783 | } | |
2784 | ||
2785 | static void con_flush_chars(struct tty_struct *tty) | |
2786 | { | |
2787 | struct vc_data *vc; | |
2788 | ||
2789 | if (in_interrupt()) /* from flush_to_ldisc */ | |
2790 | return; | |
2791 | ||
2792 | /* if we race with con_close(), vt may be null */ | |
2793 | acquire_console_sem(); | |
2794 | vc = tty->driver_data; | |
2795 | if (vc) | |
2796 | set_cursor(vc); | |
2797 | release_console_sem(); | |
2798 | } | |
2799 | ||
2800 | /* | |
2801 | * Allocate the console screen memory. | |
2802 | */ | |
2803 | static int con_open(struct tty_struct *tty, struct file *filp) | |
2804 | { | |
2805 | unsigned int currcons = tty->index; | |
2806 | int ret = 0; | |
2807 | ||
2808 | acquire_console_sem(); | |
f786648b | 2809 | if (tty->driver_data == NULL) { |
1da177e4 LT |
2810 | ret = vc_allocate(currcons); |
2811 | if (ret == 0) { | |
2812 | struct vc_data *vc = vc_cons[currcons].d; | |
feebed65 AC |
2813 | |
2814 | /* Still being freed */ | |
8ce73264 | 2815 | if (vc->port.tty) { |
feebed65 AC |
2816 | release_console_sem(); |
2817 | return -ERESTARTSYS; | |
2818 | } | |
1da177e4 | 2819 | tty->driver_data = vc; |
8ce73264 | 2820 | vc->port.tty = tty; |
1da177e4 LT |
2821 | |
2822 | if (!tty->winsize.ws_row && !tty->winsize.ws_col) { | |
2823 | tty->winsize.ws_row = vc_cons[currcons].d->vc_rows; | |
2824 | tty->winsize.ws_col = vc_cons[currcons].d->vc_cols; | |
2825 | } | |
c1236d31 ST |
2826 | if (vc->vc_utf) |
2827 | tty->termios->c_iflag |= IUTF8; | |
2828 | else | |
2829 | tty->termios->c_iflag &= ~IUTF8; | |
e0426e6a | 2830 | release_console_sem(); |
1da177e4 LT |
2831 | return ret; |
2832 | } | |
2833 | } | |
2834 | release_console_sem(); | |
2835 | return ret; | |
2836 | } | |
2837 | ||
1da177e4 LT |
2838 | static void con_close(struct tty_struct *tty, struct file *filp) |
2839 | { | |
feebed65 AC |
2840 | /* Nothing to do - we defer to shutdown */ |
2841 | } | |
1da177e4 | 2842 | |
feebed65 AC |
2843 | static void con_shutdown(struct tty_struct *tty) |
2844 | { | |
2845 | struct vc_data *vc = tty->driver_data; | |
2846 | BUG_ON(vc == NULL); | |
2847 | acquire_console_sem(); | |
8ce73264 | 2848 | vc->port.tty = NULL; |
1da177e4 | 2849 | release_console_sem(); |
feebed65 | 2850 | tty_shutdown(tty); |
1da177e4 LT |
2851 | } |
2852 | ||
fa6ce9ab JE |
2853 | static int default_italic_color = 2; // green (ASCII) |
2854 | static int default_underline_color = 3; // cyan (ASCII) | |
2855 | module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR); | |
2856 | module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR); | |
2857 | ||
1da177e4 LT |
2858 | static void vc_init(struct vc_data *vc, unsigned int rows, |
2859 | unsigned int cols, int do_clear) | |
2860 | { | |
2861 | int j, k ; | |
2862 | ||
2863 | vc->vc_cols = cols; | |
2864 | vc->vc_rows = rows; | |
2865 | vc->vc_size_row = cols << 1; | |
2866 | vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row; | |
2867 | ||
2868 | set_origin(vc); | |
2869 | vc->vc_pos = vc->vc_origin; | |
2870 | reset_vc(vc); | |
2871 | for (j=k=0; j<16; j++) { | |
2872 | vc->vc_palette[k++] = default_red[j] ; | |
2873 | vc->vc_palette[k++] = default_grn[j] ; | |
2874 | vc->vc_palette[k++] = default_blu[j] ; | |
2875 | } | |
2876 | vc->vc_def_color = 0x07; /* white */ | |
fa6ce9ab JE |
2877 | vc->vc_ulcolor = default_underline_color; |
2878 | vc->vc_itcolor = default_italic_color; | |
1da177e4 LT |
2879 | vc->vc_halfcolor = 0x08; /* grey */ |
2880 | init_waitqueue_head(&vc->paste_wait); | |
2881 | reset_terminal(vc, do_clear); | |
2882 | } | |
2883 | ||
2884 | /* | |
2885 | * This routine initializes console interrupts, and does nothing | |
2886 | * else. If you want the screen to clear, call tty_write with | |
2887 | * the appropriate escape-sequence. | |
2888 | */ | |
2889 | ||
2890 | static int __init con_init(void) | |
2891 | { | |
2892 | const char *display_desc = NULL; | |
2893 | struct vc_data *vc; | |
3e795de7 | 2894 | unsigned int currcons = 0, i; |
1da177e4 LT |
2895 | |
2896 | acquire_console_sem(); | |
2897 | ||
2898 | if (conswitchp) | |
2899 | display_desc = conswitchp->con_startup(); | |
2900 | if (!display_desc) { | |
2901 | fg_console = 0; | |
2902 | release_console_sem(); | |
2903 | return 0; | |
2904 | } | |
2905 | ||
3e795de7 AD |
2906 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { |
2907 | struct con_driver *con_driver = ®istered_con_driver[i]; | |
2908 | ||
2909 | if (con_driver->con == NULL) { | |
2910 | con_driver->con = conswitchp; | |
2911 | con_driver->desc = display_desc; | |
2912 | con_driver->flag = CON_DRIVER_FLAG_INIT; | |
2913 | con_driver->first = 0; | |
2914 | con_driver->last = MAX_NR_CONSOLES - 1; | |
2915 | break; | |
2916 | } | |
2917 | } | |
2918 | ||
2919 | for (i = 0; i < MAX_NR_CONSOLES; i++) | |
2920 | con_driver_map[i] = conswitchp; | |
2921 | ||
1da177e4 LT |
2922 | if (blankinterval) { |
2923 | blank_state = blank_normal_wait; | |
f324edc8 | 2924 | mod_timer(&console_timer, jiffies + (blankinterval * HZ)); |
1da177e4 LT |
2925 | } |
2926 | ||
1da177e4 | 2927 | for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) { |
a5f4f52e | 2928 | vc_cons[currcons].d = vc = kzalloc(sizeof(struct vc_data), GFP_NOWAIT); |
7f1f86a0 | 2929 | INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK); |
ff917ba4 | 2930 | tty_port_init(&vc->port); |
1da177e4 | 2931 | visual_init(vc, currcons, 1); |
a5f4f52e | 2932 | vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_NOWAIT); |
1da177e4 LT |
2933 | vc_init(vc, vc->vc_rows, vc->vc_cols, |
2934 | currcons || !vc->vc_sw->con_save_screen); | |
2935 | } | |
2936 | currcons = fg_console = 0; | |
2937 | master_display_fg = vc = vc_cons[currcons].d; | |
2938 | set_origin(vc); | |
2939 | save_screen(vc); | |
2940 | gotoxy(vc, vc->vc_x, vc->vc_y); | |
2941 | csi_J(vc, 0); | |
2942 | update_screen(vc); | |
2943 | printk("Console: %s %s %dx%d", | |
2944 | vc->vc_can_do_color ? "colour" : "mono", | |
2945 | display_desc, vc->vc_cols, vc->vc_rows); | |
2946 | printable = 1; | |
2947 | printk("\n"); | |
2948 | ||
2949 | release_console_sem(); | |
2950 | ||
2951 | #ifdef CONFIG_VT_CONSOLE | |
2952 | register_console(&vt_console_driver); | |
2953 | #endif | |
2954 | return 0; | |
2955 | } | |
2956 | console_initcall(con_init); | |
2957 | ||
b68e31d0 | 2958 | static const struct tty_operations con_ops = { |
1da177e4 LT |
2959 | .open = con_open, |
2960 | .close = con_close, | |
2961 | .write = con_write, | |
2962 | .write_room = con_write_room, | |
2963 | .put_char = con_put_char, | |
2964 | .flush_chars = con_flush_chars, | |
2965 | .chars_in_buffer = con_chars_in_buffer, | |
2966 | .ioctl = vt_ioctl, | |
e9216651 AB |
2967 | #ifdef CONFIG_COMPAT |
2968 | .compat_ioctl = vt_compat_ioctl, | |
2969 | #endif | |
1da177e4 LT |
2970 | .stop = con_stop, |
2971 | .start = con_start, | |
2972 | .throttle = con_throttle, | |
2973 | .unthrottle = con_unthrottle, | |
8c9a9dd0 | 2974 | .resize = vt_resize, |
feebed65 | 2975 | .shutdown = con_shutdown |
1da177e4 LT |
2976 | }; |
2977 | ||
d81ed103 AC |
2978 | static struct cdev vc0_cdev; |
2979 | ||
fbc92a34 KS |
2980 | static ssize_t show_tty_active(struct device *dev, |
2981 | struct device_attribute *attr, char *buf) | |
2982 | { | |
2983 | return sprintf(buf, "tty%d\n", fg_console + 1); | |
2984 | } | |
2985 | static DEVICE_ATTR(active, S_IRUGO, show_tty_active, NULL); | |
2986 | ||
d81ed103 | 2987 | int __init vty_init(const struct file_operations *console_fops) |
1da177e4 | 2988 | { |
d81ed103 AC |
2989 | cdev_init(&vc0_cdev, console_fops); |
2990 | if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) || | |
2991 | register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0) | |
2992 | panic("Couldn't register /dev/tty0 driver\n"); | |
fbc92a34 KS |
2993 | tty0dev = device_create(tty_class, NULL, MKDEV(TTY_MAJOR, 0), NULL, "tty0"); |
2994 | if (IS_ERR(tty0dev)) | |
2995 | tty0dev = NULL; | |
2996 | else | |
2997 | device_create_file(tty0dev, &dev_attr_active); | |
d81ed103 | 2998 | |
1da177e4 LT |
2999 | vcs_init(); |
3000 | ||
3001 | console_driver = alloc_tty_driver(MAX_NR_CONSOLES); | |
3002 | if (!console_driver) | |
3003 | panic("Couldn't allocate console driver\n"); | |
3004 | console_driver->owner = THIS_MODULE; | |
1da177e4 LT |
3005 | console_driver->name = "tty"; |
3006 | console_driver->name_base = 1; | |
3007 | console_driver->major = TTY_MAJOR; | |
3008 | console_driver->minor_start = 1; | |
3009 | console_driver->type = TTY_DRIVER_TYPE_CONSOLE; | |
3010 | console_driver->init_termios = tty_std_termios; | |
c1236d31 ST |
3011 | if (default_utf8) |
3012 | console_driver->init_termios.c_iflag |= IUTF8; | |
1da177e4 LT |
3013 | console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS; |
3014 | tty_set_operations(console_driver, &con_ops); | |
3015 | if (tty_register_driver(console_driver)) | |
3016 | panic("Couldn't register console driver\n"); | |
1da177e4 LT |
3017 | kbd_init(); |
3018 | console_map_init(); | |
1da177e4 LT |
3019 | #ifdef CONFIG_MDA_CONSOLE |
3020 | mda_console_init(); | |
3021 | #endif | |
3022 | return 0; | |
3023 | } | |
3024 | ||
3025 | #ifndef VT_SINGLE_DRIVER | |
6db4063c AD |
3026 | |
3027 | static struct class *vtconsole_class; | |
3028 | ||
b7269dd2 JB |
3029 | static int bind_con_driver(const struct consw *csw, int first, int last, |
3030 | int deflt) | |
1da177e4 | 3031 | { |
3e795de7 AD |
3032 | struct module *owner = csw->owner; |
3033 | const char *desc = NULL; | |
3034 | struct con_driver *con_driver; | |
3035 | int i, j = -1, k = -1, retval = -ENODEV; | |
1da177e4 | 3036 | |
1da177e4 LT |
3037 | if (!try_module_get(owner)) |
3038 | return -ENODEV; | |
3039 | ||
1c8ce271 | 3040 | acquire_console_sem(); |
1c8ce271 | 3041 | |
3e795de7 AD |
3042 | /* check if driver is registered */ |
3043 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { | |
3044 | con_driver = ®istered_con_driver[i]; | |
3045 | ||
3046 | if (con_driver->con == csw) { | |
3047 | desc = con_driver->desc; | |
3048 | retval = 0; | |
3049 | break; | |
3050 | } | |
3051 | } | |
3052 | ||
3053 | if (retval) | |
3054 | goto err; | |
3055 | ||
3056 | if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) { | |
3057 | csw->con_startup(); | |
3058 | con_driver->flag |= CON_DRIVER_FLAG_INIT; | |
1da177e4 | 3059 | } |
1c8ce271 | 3060 | |
1da177e4 LT |
3061 | if (deflt) { |
3062 | if (conswitchp) | |
3063 | module_put(conswitchp->owner); | |
1c8ce271 | 3064 | |
1da177e4 LT |
3065 | __module_get(owner); |
3066 | conswitchp = csw; | |
3067 | } | |
3068 | ||
3e795de7 AD |
3069 | first = max(first, con_driver->first); |
3070 | last = min(last, con_driver->last); | |
3071 | ||
1da177e4 LT |
3072 | for (i = first; i <= last; i++) { |
3073 | int old_was_color; | |
3074 | struct vc_data *vc = vc_cons[i].d; | |
3075 | ||
3076 | if (con_driver_map[i]) | |
3077 | module_put(con_driver_map[i]->owner); | |
3078 | __module_get(owner); | |
3079 | con_driver_map[i] = csw; | |
3080 | ||
3081 | if (!vc || !vc->vc_sw) | |
3082 | continue; | |
3083 | ||
3084 | j = i; | |
1c8ce271 | 3085 | |
4ee1acce DH |
3086 | if (CON_IS_VISIBLE(vc)) { |
3087 | k = i; | |
1da177e4 | 3088 | save_screen(vc); |
4ee1acce DH |
3089 | } |
3090 | ||
1da177e4 LT |
3091 | old_was_color = vc->vc_can_do_color; |
3092 | vc->vc_sw->con_deinit(vc); | |
9fc2b2d0 | 3093 | vc->vc_origin = (unsigned long)vc->vc_screenbuf; |
1da177e4 | 3094 | visual_init(vc, i, 0); |
1c8ce271 | 3095 | set_origin(vc); |
1da177e4 LT |
3096 | update_attr(vc); |
3097 | ||
3098 | /* If the console changed between mono <-> color, then | |
3099 | * the attributes in the screenbuf will be wrong. The | |
3100 | * following resets all attributes to something sane. | |
3101 | */ | |
3102 | if (old_was_color != vc->vc_can_do_color) | |
3103 | clear_buffer_attributes(vc); | |
1da177e4 | 3104 | } |
4ee1acce | 3105 | |
1da177e4 LT |
3106 | printk("Console: switching "); |
3107 | if (!deflt) | |
3108 | printk("consoles %d-%d ", first+1, last+1); | |
4ee1acce DH |
3109 | if (j >= 0) { |
3110 | struct vc_data *vc = vc_cons[j].d; | |
3111 | ||
1da177e4 | 3112 | printk("to %s %s %dx%d\n", |
4ee1acce DH |
3113 | vc->vc_can_do_color ? "colour" : "mono", |
3114 | desc, vc->vc_cols, vc->vc_rows); | |
3115 | ||
3116 | if (k >= 0) { | |
3117 | vc = vc_cons[k].d; | |
3118 | update_screen(vc); | |
3119 | } | |
3120 | } else | |
1da177e4 LT |
3121 | printk("to %s\n", desc); |
3122 | ||
3e795de7 AD |
3123 | retval = 0; |
3124 | err: | |
1da177e4 | 3125 | release_console_sem(); |
1da177e4 | 3126 | module_put(owner); |
3e795de7 AD |
3127 | return retval; |
3128 | }; | |
1da177e4 | 3129 | |
13ae6645 AD |
3130 | #ifdef CONFIG_VT_HW_CONSOLE_BINDING |
3131 | static int con_is_graphics(const struct consw *csw, int first, int last) | |
3132 | { | |
3133 | int i, retval = 0; | |
3134 | ||
3135 | for (i = first; i <= last; i++) { | |
3136 | struct vc_data *vc = vc_cons[i].d; | |
3137 | ||
3138 | if (vc && vc->vc_mode == KD_GRAPHICS) { | |
3139 | retval = 1; | |
3140 | break; | |
3141 | } | |
3142 | } | |
3143 | ||
3144 | return retval; | |
3145 | } | |
3146 | ||
b7269dd2 JB |
3147 | /** |
3148 | * unbind_con_driver - unbind a console driver | |
3149 | * @csw: pointer to console driver to unregister | |
3150 | * @first: first in range of consoles that @csw should be unbound from | |
3151 | * @last: last in range of consoles that @csw should be unbound from | |
3152 | * @deflt: should next bound console driver be default after @csw is unbound? | |
3153 | * | |
3154 | * To unbind a driver from all possible consoles, pass 0 as @first and | |
3155 | * %MAX_NR_CONSOLES as @last. | |
3156 | * | |
3157 | * @deflt controls whether the console that ends up replacing @csw should be | |
3158 | * the default console. | |
3159 | * | |
3160 | * RETURNS: | |
3161 | * -ENODEV if @csw isn't a registered console driver or can't be unregistered | |
3162 | * or 0 on success. | |
3163 | */ | |
623e71b0 | 3164 | int unbind_con_driver(const struct consw *csw, int first, int last, int deflt) |
1da177e4 | 3165 | { |
3e795de7 AD |
3166 | struct module *owner = csw->owner; |
3167 | const struct consw *defcsw = NULL; | |
3168 | struct con_driver *con_driver = NULL, *con_back = NULL; | |
3169 | int i, retval = -ENODEV; | |
1da177e4 | 3170 | |
3e795de7 AD |
3171 | if (!try_module_get(owner)) |
3172 | return -ENODEV; | |
3173 | ||
3174 | acquire_console_sem(); | |
3175 | ||
3176 | /* check if driver is registered and if it is unbindable */ | |
3177 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { | |
3178 | con_driver = ®istered_con_driver[i]; | |
3179 | ||
3180 | if (con_driver->con == csw && | |
6db4063c | 3181 | con_driver->flag & CON_DRIVER_FLAG_MODULE) { |
3e795de7 AD |
3182 | retval = 0; |
3183 | break; | |
3184 | } | |
3185 | } | |
3186 | ||
3187 | if (retval) { | |
3188 | release_console_sem(); | |
3189 | goto err; | |
3190 | } | |
3191 | ||
6db4063c AD |
3192 | retval = -ENODEV; |
3193 | ||
3e795de7 AD |
3194 | /* check if backup driver exists */ |
3195 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { | |
3196 | con_back = ®istered_con_driver[i]; | |
3197 | ||
3198 | if (con_back->con && | |
6db4063c | 3199 | !(con_back->flag & CON_DRIVER_FLAG_MODULE)) { |
3e795de7 AD |
3200 | defcsw = con_back->con; |
3201 | retval = 0; | |
3202 | break; | |
3203 | } | |
3204 | } | |
3205 | ||
3206 | if (retval) { | |
3207 | release_console_sem(); | |
3208 | goto err; | |
3209 | } | |
3210 | ||
3211 | if (!con_is_bound(csw)) { | |
3212 | release_console_sem(); | |
3213 | goto err; | |
3214 | } | |
3215 | ||
3216 | first = max(first, con_driver->first); | |
3217 | last = min(last, con_driver->last); | |
3218 | ||
3219 | for (i = first; i <= last; i++) { | |
1da177e4 LT |
3220 | if (con_driver_map[i] == csw) { |
3221 | module_put(csw->owner); | |
3222 | con_driver_map[i] = NULL; | |
3223 | } | |
3e795de7 AD |
3224 | } |
3225 | ||
3226 | if (!con_is_bound(defcsw)) { | |
6db4063c AD |
3227 | const struct consw *defconsw = conswitchp; |
3228 | ||
3e795de7 AD |
3229 | defcsw->con_startup(); |
3230 | con_back->flag |= CON_DRIVER_FLAG_INIT; | |
6db4063c AD |
3231 | /* |
3232 | * vgacon may change the default driver to point | |
3233 | * to dummycon, we restore it here... | |
3234 | */ | |
3235 | conswitchp = defconsw; | |
3e795de7 AD |
3236 | } |
3237 | ||
3238 | if (!con_is_bound(csw)) | |
3239 | con_driver->flag &= ~CON_DRIVER_FLAG_INIT; | |
3240 | ||
3241 | release_console_sem(); | |
6db4063c AD |
3242 | /* ignore return value, binding should not fail */ |
3243 | bind_con_driver(defcsw, first, last, deflt); | |
3e795de7 AD |
3244 | err: |
3245 | module_put(owner); | |
3246 | return retval; | |
3247 | ||
3248 | } | |
623e71b0 | 3249 | EXPORT_SYMBOL(unbind_con_driver); |
3e795de7 | 3250 | |
6db4063c AD |
3251 | static int vt_bind(struct con_driver *con) |
3252 | { | |
3253 | const struct consw *defcsw = NULL, *csw = NULL; | |
3254 | int i, more = 1, first = -1, last = -1, deflt = 0; | |
3255 | ||
3256 | if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) || | |
3257 | con_is_graphics(con->con, con->first, con->last)) | |
3258 | goto err; | |
3259 | ||
3260 | csw = con->con; | |
3261 | ||
3262 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { | |
3263 | struct con_driver *con = ®istered_con_driver[i]; | |
3264 | ||
3265 | if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) { | |
3266 | defcsw = con->con; | |
3267 | break; | |
3268 | } | |
3269 | } | |
3270 | ||
3271 | if (!defcsw) | |
3272 | goto err; | |
3273 | ||
3274 | while (more) { | |
3275 | more = 0; | |
3276 | ||
3277 | for (i = con->first; i <= con->last; i++) { | |
3278 | if (con_driver_map[i] == defcsw) { | |
3279 | if (first == -1) | |
3280 | first = i; | |
3281 | last = i; | |
3282 | more = 1; | |
3283 | } else if (first != -1) | |
3284 | break; | |
3285 | } | |
3286 | ||
3287 | if (first == 0 && last == MAX_NR_CONSOLES -1) | |
3288 | deflt = 1; | |
3289 | ||
3290 | if (first != -1) | |
3291 | bind_con_driver(csw, first, last, deflt); | |
3292 | ||
3293 | first = -1; | |
3294 | last = -1; | |
3295 | deflt = 0; | |
3296 | } | |
3297 | ||
3298 | err: | |
3299 | return 0; | |
3300 | } | |
3301 | ||
3302 | static int vt_unbind(struct con_driver *con) | |
3303 | { | |
3304 | const struct consw *csw = NULL; | |
3305 | int i, more = 1, first = -1, last = -1, deflt = 0; | |
3306 | ||
3307 | if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) || | |
3308 | con_is_graphics(con->con, con->first, con->last)) | |
3309 | goto err; | |
3310 | ||
3311 | csw = con->con; | |
3312 | ||
3313 | while (more) { | |
3314 | more = 0; | |
3315 | ||
3316 | for (i = con->first; i <= con->last; i++) { | |
3317 | if (con_driver_map[i] == csw) { | |
3318 | if (first == -1) | |
3319 | first = i; | |
3320 | last = i; | |
3321 | more = 1; | |
3322 | } else if (first != -1) | |
3323 | break; | |
3324 | } | |
3325 | ||
3326 | if (first == 0 && last == MAX_NR_CONSOLES -1) | |
3327 | deflt = 1; | |
3328 | ||
3329 | if (first != -1) | |
3330 | unbind_con_driver(csw, first, last, deflt); | |
3331 | ||
3332 | first = -1; | |
3333 | last = -1; | |
3334 | deflt = 0; | |
3335 | } | |
3336 | ||
3337 | err: | |
3338 | return 0; | |
3339 | } | |
13ae6645 AD |
3340 | #else |
3341 | static inline int vt_bind(struct con_driver *con) | |
3342 | { | |
3343 | return 0; | |
3344 | } | |
3345 | static inline int vt_unbind(struct con_driver *con) | |
3346 | { | |
3347 | return 0; | |
3348 | } | |
3349 | #endif /* CONFIG_VT_HW_CONSOLE_BINDING */ | |
6db4063c | 3350 | |
805952a8 | 3351 | static ssize_t store_bind(struct device *dev, struct device_attribute *attr, |
6db4063c AD |
3352 | const char *buf, size_t count) |
3353 | { | |
805952a8 | 3354 | struct con_driver *con = dev_get_drvdata(dev); |
6db4063c AD |
3355 | int bind = simple_strtoul(buf, NULL, 0); |
3356 | ||
3357 | if (bind) | |
3358 | vt_bind(con); | |
3359 | else | |
3360 | vt_unbind(con); | |
3361 | ||
3362 | return count; | |
3363 | } | |
3364 | ||
805952a8 GKH |
3365 | static ssize_t show_bind(struct device *dev, struct device_attribute *attr, |
3366 | char *buf) | |
6db4063c | 3367 | { |
805952a8 | 3368 | struct con_driver *con = dev_get_drvdata(dev); |
6db4063c AD |
3369 | int bind = con_is_bound(con->con); |
3370 | ||
3371 | return snprintf(buf, PAGE_SIZE, "%i\n", bind); | |
3372 | } | |
3373 | ||
805952a8 GKH |
3374 | static ssize_t show_name(struct device *dev, struct device_attribute *attr, |
3375 | char *buf) | |
6db4063c | 3376 | { |
805952a8 | 3377 | struct con_driver *con = dev_get_drvdata(dev); |
6db4063c AD |
3378 | |
3379 | return snprintf(buf, PAGE_SIZE, "%s %s\n", | |
3380 | (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)", | |
3381 | con->desc); | |
3382 | ||
3383 | } | |
3384 | ||
805952a8 | 3385 | static struct device_attribute device_attrs[] = { |
6db4063c AD |
3386 | __ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind), |
3387 | __ATTR(name, S_IRUGO, show_name, NULL), | |
3388 | }; | |
3389 | ||
805952a8 | 3390 | static int vtconsole_init_device(struct con_driver *con) |
6db4063c AD |
3391 | { |
3392 | int i; | |
928e964f | 3393 | int error = 0; |
6db4063c | 3394 | |
928e964f | 3395 | con->flag |= CON_DRIVER_FLAG_ATTR; |
805952a8 GKH |
3396 | dev_set_drvdata(con->dev, con); |
3397 | for (i = 0; i < ARRAY_SIZE(device_attrs); i++) { | |
3398 | error = device_create_file(con->dev, &device_attrs[i]); | |
928e964f AD |
3399 | if (error) |
3400 | break; | |
3401 | } | |
6db4063c | 3402 | |
928e964f AD |
3403 | if (error) { |
3404 | while (--i >= 0) | |
805952a8 | 3405 | device_remove_file(con->dev, &device_attrs[i]); |
928e964f AD |
3406 | con->flag &= ~CON_DRIVER_FLAG_ATTR; |
3407 | } | |
3408 | ||
3409 | return error; | |
6db4063c AD |
3410 | } |
3411 | ||
805952a8 | 3412 | static void vtconsole_deinit_device(struct con_driver *con) |
6db4063c AD |
3413 | { |
3414 | int i; | |
3415 | ||
928e964f | 3416 | if (con->flag & CON_DRIVER_FLAG_ATTR) { |
805952a8 GKH |
3417 | for (i = 0; i < ARRAY_SIZE(device_attrs); i++) |
3418 | device_remove_file(con->dev, &device_attrs[i]); | |
928e964f AD |
3419 | con->flag &= ~CON_DRIVER_FLAG_ATTR; |
3420 | } | |
6db4063c AD |
3421 | } |
3422 | ||
3e795de7 AD |
3423 | /** |
3424 | * con_is_bound - checks if driver is bound to the console | |
3425 | * @csw: console driver | |
3426 | * | |
3427 | * RETURNS: zero if unbound, nonzero if bound | |
3428 | * | |
3429 | * Drivers can call this and if zero, they should release | |
3430 | * all resources allocated on con_startup() | |
3431 | */ | |
3432 | int con_is_bound(const struct consw *csw) | |
3433 | { | |
3434 | int i, bound = 0; | |
3435 | ||
3436 | for (i = 0; i < MAX_NR_CONSOLES; i++) { | |
3437 | if (con_driver_map[i] == csw) { | |
3438 | bound = 1; | |
3439 | break; | |
3440 | } | |
3441 | } | |
3442 | ||
3443 | return bound; | |
3444 | } | |
3445 | EXPORT_SYMBOL(con_is_bound); | |
3446 | ||
b45cfba4 JB |
3447 | /** |
3448 | * con_debug_enter - prepare the console for the kernel debugger | |
3449 | * @sw: console driver | |
3450 | * | |
3451 | * Called when the console is taken over by the kernel debugger, this | |
3452 | * function needs to save the current console state, then put the console | |
3453 | * into a state suitable for the kernel debugger. | |
3454 | * | |
3455 | * RETURNS: | |
3456 | * Zero on success, nonzero if a failure occurred when trying to prepare | |
3457 | * the console for the debugger. | |
3458 | */ | |
3459 | int con_debug_enter(struct vc_data *vc) | |
3460 | { | |
3461 | int ret = 0; | |
3462 | ||
3463 | saved_fg_console = fg_console; | |
3464 | saved_last_console = last_console; | |
3465 | saved_want_console = want_console; | |
3466 | saved_vc_mode = vc->vc_mode; | |
beed5336 | 3467 | saved_console_blanked = console_blanked; |
b45cfba4 JB |
3468 | vc->vc_mode = KD_TEXT; |
3469 | console_blanked = 0; | |
3470 | if (vc->vc_sw->con_debug_enter) | |
3471 | ret = vc->vc_sw->con_debug_enter(vc); | |
81d44507 JW |
3472 | #ifdef CONFIG_KGDB_KDB |
3473 | /* Set the initial LINES variable if it is not already set */ | |
3474 | if (vc->vc_rows < 999) { | |
3475 | int linecount; | |
3476 | char lns[4]; | |
3477 | const char *setargs[3] = { | |
3478 | "set", | |
3479 | "LINES", | |
3480 | lns, | |
3481 | }; | |
3482 | if (kdbgetintenv(setargs[0], &linecount)) { | |
3483 | snprintf(lns, 4, "%i", vc->vc_rows); | |
3484 | kdb_set(2, setargs); | |
3485 | } | |
3486 | } | |
3487 | #endif /* CONFIG_KGDB_KDB */ | |
b45cfba4 JB |
3488 | return ret; |
3489 | } | |
3490 | EXPORT_SYMBOL_GPL(con_debug_enter); | |
3491 | ||
3492 | /** | |
3493 | * con_debug_leave - restore console state | |
3494 | * @sw: console driver | |
3495 | * | |
3496 | * Restore the console state to what it was before the kernel debugger | |
3497 | * was invoked. | |
3498 | * | |
3499 | * RETURNS: | |
3500 | * Zero on success, nonzero if a failure occurred when trying to restore | |
3501 | * the console. | |
3502 | */ | |
3503 | int con_debug_leave(void) | |
3504 | { | |
3505 | struct vc_data *vc; | |
3506 | int ret = 0; | |
3507 | ||
3508 | fg_console = saved_fg_console; | |
3509 | last_console = saved_last_console; | |
3510 | want_console = saved_want_console; | |
beed5336 | 3511 | console_blanked = saved_console_blanked; |
b45cfba4 JB |
3512 | vc_cons[fg_console].d->vc_mode = saved_vc_mode; |
3513 | ||
3514 | vc = vc_cons[fg_console].d; | |
3515 | if (vc->vc_sw->con_debug_leave) | |
3516 | ret = vc->vc_sw->con_debug_leave(vc); | |
3517 | return ret; | |
3518 | } | |
3519 | EXPORT_SYMBOL_GPL(con_debug_leave); | |
3520 | ||
3e795de7 AD |
3521 | /** |
3522 | * register_con_driver - register console driver to console layer | |
3523 | * @csw: console driver | |
3524 | * @first: the first console to take over, minimum value is 0 | |
3525 | * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1 | |
3526 | * | |
3527 | * DESCRIPTION: This function registers a console driver which can later | |
3528 | * bind to a range of consoles specified by @first and @last. It will | |
3529 | * also initialize the console driver by calling con_startup(). | |
3530 | */ | |
3531 | int register_con_driver(const struct consw *csw, int first, int last) | |
3532 | { | |
3533 | struct module *owner = csw->owner; | |
3534 | struct con_driver *con_driver; | |
3535 | const char *desc; | |
3536 | int i, retval = 0; | |
3537 | ||
3538 | if (!try_module_get(owner)) | |
3539 | return -ENODEV; | |
3540 | ||
3541 | acquire_console_sem(); | |
3542 | ||
3543 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { | |
3544 | con_driver = ®istered_con_driver[i]; | |
3545 | ||
3546 | /* already registered */ | |
3547 | if (con_driver->con == csw) | |
3548 | retval = -EINVAL; | |
3549 | } | |
3550 | ||
3551 | if (retval) | |
3552 | goto err; | |
3553 | ||
3554 | desc = csw->con_startup(); | |
3555 | ||
3556 | if (!desc) | |
3557 | goto err; | |
3558 | ||
3559 | retval = -EINVAL; | |
3560 | ||
3561 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { | |
3562 | con_driver = ®istered_con_driver[i]; | |
3563 | ||
3564 | if (con_driver->con == NULL) { | |
3565 | con_driver->con = csw; | |
3566 | con_driver->desc = desc; | |
6db4063c AD |
3567 | con_driver->node = i; |
3568 | con_driver->flag = CON_DRIVER_FLAG_MODULE | | |
3e795de7 AD |
3569 | CON_DRIVER_FLAG_INIT; |
3570 | con_driver->first = first; | |
3571 | con_driver->last = last; | |
3572 | retval = 0; | |
3573 | break; | |
3574 | } | |
3575 | } | |
3576 | ||
6db4063c AD |
3577 | if (retval) |
3578 | goto err; | |
3579 | ||
d81ed103 | 3580 | con_driver->dev = device_create(vtconsole_class, NULL, |
47aa5793 GKH |
3581 | MKDEV(0, con_driver->node), |
3582 | NULL, "vtcon%i", | |
3583 | con_driver->node); | |
6db4063c | 3584 | |
805952a8 GKH |
3585 | if (IS_ERR(con_driver->dev)) { |
3586 | printk(KERN_WARNING "Unable to create device for %s; " | |
6db4063c | 3587 | "errno = %ld\n", con_driver->desc, |
805952a8 GKH |
3588 | PTR_ERR(con_driver->dev)); |
3589 | con_driver->dev = NULL; | |
6db4063c | 3590 | } else { |
805952a8 | 3591 | vtconsole_init_device(con_driver); |
6db4063c | 3592 | } |
928e964f | 3593 | |
3e795de7 AD |
3594 | err: |
3595 | release_console_sem(); | |
3596 | module_put(owner); | |
3597 | return retval; | |
3598 | } | |
3599 | EXPORT_SYMBOL(register_con_driver); | |
3600 | ||
3601 | /** | |
3602 | * unregister_con_driver - unregister console driver from console layer | |
3603 | * @csw: console driver | |
3604 | * | |
3605 | * DESCRIPTION: All drivers that registers to the console layer must | |
3606 | * call this function upon exit, or if the console driver is in a state | |
3607 | * where it won't be able to handle console services, such as the | |
3608 | * framebuffer console without loaded framebuffer drivers. | |
3609 | * | |
3610 | * The driver must unbind first prior to unregistration. | |
3611 | */ | |
3612 | int unregister_con_driver(const struct consw *csw) | |
3613 | { | |
3614 | int i, retval = -ENODEV; | |
3615 | ||
3616 | acquire_console_sem(); | |
3617 | ||
3618 | /* cannot unregister a bound driver */ | |
3619 | if (con_is_bound(csw)) | |
3620 | goto err; | |
3621 | ||
3622 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { | |
3623 | struct con_driver *con_driver = ®istered_con_driver[i]; | |
3624 | ||
3625 | if (con_driver->con == csw && | |
6db4063c | 3626 | con_driver->flag & CON_DRIVER_FLAG_MODULE) { |
805952a8 GKH |
3627 | vtconsole_deinit_device(con_driver); |
3628 | device_destroy(vtconsole_class, | |
3629 | MKDEV(0, con_driver->node)); | |
3e795de7 AD |
3630 | con_driver->con = NULL; |
3631 | con_driver->desc = NULL; | |
805952a8 | 3632 | con_driver->dev = NULL; |
6db4063c | 3633 | con_driver->node = 0; |
3e795de7 AD |
3634 | con_driver->flag = 0; |
3635 | con_driver->first = 0; | |
3636 | con_driver->last = 0; | |
3637 | retval = 0; | |
3638 | break; | |
3639 | } | |
3640 | } | |
3e795de7 AD |
3641 | err: |
3642 | release_console_sem(); | |
3643 | return retval; | |
3644 | } | |
3645 | EXPORT_SYMBOL(unregister_con_driver); | |
3646 | ||
3647 | /* | |
3648 | * If we support more console drivers, this function is used | |
3649 | * when a driver wants to take over some existing consoles | |
3650 | * and become default driver for newly opened ones. | |
3651 | * | |
3652 | * take_over_console is basically a register followed by unbind | |
3653 | */ | |
3654 | int take_over_console(const struct consw *csw, int first, int last, int deflt) | |
3655 | { | |
3656 | int err; | |
3657 | ||
3658 | err = register_con_driver(csw, first, last); | |
3659 | ||
3660 | if (!err) | |
6db4063c | 3661 | bind_con_driver(csw, first, last, deflt); |
3e795de7 AD |
3662 | |
3663 | return err; | |
3664 | } | |
3665 | ||
3666 | /* | |
3667 | * give_up_console is a wrapper to unregister_con_driver. It will only | |
3668 | * work if driver is fully unbound. | |
3669 | */ | |
3670 | void give_up_console(const struct consw *csw) | |
3671 | { | |
3672 | unregister_con_driver(csw); | |
3673 | } | |
3674 | ||
6db4063c | 3675 | static int __init vtconsole_class_init(void) |
3e795de7 | 3676 | { |
6db4063c | 3677 | int i; |
3e795de7 | 3678 | |
6db4063c AD |
3679 | vtconsole_class = class_create(THIS_MODULE, "vtconsole"); |
3680 | if (IS_ERR(vtconsole_class)) { | |
3681 | printk(KERN_WARNING "Unable to create vt console class; " | |
3682 | "errno = %ld\n", PTR_ERR(vtconsole_class)); | |
3683 | vtconsole_class = NULL; | |
3684 | } | |
3e795de7 | 3685 | |
6db4063c | 3686 | /* Add system drivers to sysfs */ |
3e795de7 AD |
3687 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { |
3688 | struct con_driver *con = ®istered_con_driver[i]; | |
3689 | ||
805952a8 | 3690 | if (con->con && !con->dev) { |
d81ed103 | 3691 | con->dev = device_create(vtconsole_class, NULL, |
47aa5793 GKH |
3692 | MKDEV(0, con->node), |
3693 | NULL, "vtcon%i", | |
3694 | con->node); | |
6db4063c | 3695 | |
805952a8 | 3696 | if (IS_ERR(con->dev)) { |
6db4063c | 3697 | printk(KERN_WARNING "Unable to create " |
805952a8 GKH |
3698 | "device for %s; errno = %ld\n", |
3699 | con->desc, PTR_ERR(con->dev)); | |
3700 | con->dev = NULL; | |
6db4063c | 3701 | } else { |
805952a8 | 3702 | vtconsole_init_device(con); |
6db4063c | 3703 | } |
3e795de7 | 3704 | } |
3e795de7 AD |
3705 | } |
3706 | ||
3e795de7 AD |
3707 | return 0; |
3708 | } | |
6db4063c | 3709 | postcore_initcall(vtconsole_class_init); |
3e795de7 | 3710 | |
1da177e4 LT |
3711 | #endif |
3712 | ||
3713 | /* | |
3714 | * Screen blanking | |
3715 | */ | |
3716 | ||
403aac96 | 3717 | static int set_vesa_blanking(char __user *p) |
1da177e4 | 3718 | { |
403aac96 YY |
3719 | unsigned int mode; |
3720 | ||
3721 | if (get_user(mode, p + 1)) | |
3722 | return -EFAULT; | |
3723 | ||
3724 | vesa_blank_mode = (mode < 4) ? mode : 0; | |
3725 | return 0; | |
1da177e4 LT |
3726 | } |
3727 | ||
1da177e4 LT |
3728 | void do_blank_screen(int entering_gfx) |
3729 | { | |
3730 | struct vc_data *vc = vc_cons[fg_console].d; | |
3731 | int i; | |
3732 | ||
3733 | WARN_CONSOLE_UNLOCKED(); | |
3734 | ||
3735 | if (console_blanked) { | |
3736 | if (blank_state == blank_vesa_wait) { | |
3737 | blank_state = blank_off; | |
d060a321 | 3738 | vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0); |
1da177e4 LT |
3739 | } |
3740 | return; | |
3741 | } | |
1da177e4 LT |
3742 | |
3743 | /* entering graphics mode? */ | |
3744 | if (entering_gfx) { | |
3745 | hide_cursor(vc); | |
3746 | save_screen(vc); | |
3747 | vc->vc_sw->con_blank(vc, -1, 1); | |
3748 | console_blanked = fg_console + 1; | |
b6e8f00f | 3749 | blank_state = blank_off; |
1da177e4 LT |
3750 | set_origin(vc); |
3751 | return; | |
3752 | } | |
3753 | ||
b6e8f00f | 3754 | if (blank_state != blank_normal_wait) |
3755 | return; | |
3756 | blank_state = blank_off; | |
3757 | ||
1da177e4 LT |
3758 | /* don't blank graphics */ |
3759 | if (vc->vc_mode != KD_TEXT) { | |
3760 | console_blanked = fg_console + 1; | |
3761 | return; | |
3762 | } | |
3763 | ||
3764 | hide_cursor(vc); | |
3765 | del_timer_sync(&console_timer); | |
3766 | blank_timer_expired = 0; | |
3767 | ||
3768 | save_screen(vc); | |
3769 | /* In case we need to reset origin, blanking hook returns 1 */ | |
d060a321 | 3770 | i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0); |
1da177e4 LT |
3771 | console_blanked = fg_console + 1; |
3772 | if (i) | |
3773 | set_origin(vc); | |
3774 | ||
3775 | if (console_blank_hook && console_blank_hook(1)) | |
3776 | return; | |
3777 | ||
d060a321 | 3778 | if (vesa_off_interval && vesa_blank_mode) { |
030babac | 3779 | blank_state = blank_vesa_wait; |
1da177e4 LT |
3780 | mod_timer(&console_timer, jiffies + vesa_off_interval); |
3781 | } | |
8b92e87d | 3782 | vt_event_post(VT_EVENT_BLANK, vc->vc_num, vc->vc_num); |
1da177e4 LT |
3783 | } |
3784 | EXPORT_SYMBOL(do_blank_screen); | |
3785 | ||
3786 | /* | |
3787 | * Called by timer as well as from vt_console_driver | |
3788 | */ | |
3789 | void do_unblank_screen(int leaving_gfx) | |
3790 | { | |
3791 | struct vc_data *vc; | |
3792 | ||
3793 | /* This should now always be called from a "sane" (read: can schedule) | |
3794 | * context for the sake of the low level drivers, except in the special | |
3795 | * case of oops_in_progress | |
3796 | */ | |
3797 | if (!oops_in_progress) | |
3798 | might_sleep(); | |
3799 | ||
3800 | WARN_CONSOLE_UNLOCKED(); | |
3801 | ||
3802 | ignore_poke = 0; | |
3803 | if (!console_blanked) | |
3804 | return; | |
3805 | if (!vc_cons_allocated(fg_console)) { | |
3806 | /* impossible */ | |
3807 | printk("unblank_screen: tty %d not allocated ??\n", fg_console+1); | |
3808 | return; | |
3809 | } | |
3810 | vc = vc_cons[fg_console].d; | |
8fd4bd22 JB |
3811 | /* Try to unblank in oops case too */ |
3812 | if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc)) | |
1da177e4 LT |
3813 | return; /* but leave console_blanked != 0 */ |
3814 | ||
3815 | if (blankinterval) { | |
f324edc8 | 3816 | mod_timer(&console_timer, jiffies + (blankinterval * HZ)); |
1da177e4 LT |
3817 | blank_state = blank_normal_wait; |
3818 | } | |
3819 | ||
3820 | console_blanked = 0; | |
8fd4bd22 | 3821 | if (vc->vc_sw->con_blank(vc, 0, leaving_gfx) || vt_force_oops_output(vc)) |
1da177e4 LT |
3822 | /* Low-level driver cannot restore -> do it ourselves */ |
3823 | update_screen(vc); | |
3824 | if (console_blank_hook) | |
3825 | console_blank_hook(0); | |
3826 | set_palette(vc); | |
3827 | set_cursor(vc); | |
8b92e87d | 3828 | vt_event_post(VT_EVENT_UNBLANK, vc->vc_num, vc->vc_num); |
1da177e4 LT |
3829 | } |
3830 | EXPORT_SYMBOL(do_unblank_screen); | |
3831 | ||
3832 | /* | |
3833 | * This is called by the outside world to cause a forced unblank, mostly for | |
3834 | * oopses. Currently, I just call do_unblank_screen(0), but we could eventually | |
3835 | * call it with 1 as an argument and so force a mode restore... that may kill | |
3836 | * X or at least garbage the screen but would also make the Oops visible... | |
3837 | */ | |
3838 | void unblank_screen(void) | |
3839 | { | |
3840 | do_unblank_screen(0); | |
3841 | } | |
3842 | ||
3843 | /* | |
70522e12 | 3844 | * We defer the timer blanking to work queue so it can take the console mutex |
1da177e4 | 3845 | * (console operations can still happen at irq time, but only from printk which |
70522e12 | 3846 | * has the console mutex. Not perfect yet, but better than no locking |
1da177e4 LT |
3847 | */ |
3848 | static void blank_screen_t(unsigned long dummy) | |
3849 | { | |
cc63b1e1 | 3850 | if (unlikely(!keventd_up())) { |
f324edc8 | 3851 | mod_timer(&console_timer, jiffies + (blankinterval * HZ)); |
cc63b1e1 JB |
3852 | return; |
3853 | } | |
1da177e4 LT |
3854 | blank_timer_expired = 1; |
3855 | schedule_work(&console_work); | |
3856 | } | |
3857 | ||
3858 | void poke_blanked_console(void) | |
3859 | { | |
3860 | WARN_CONSOLE_UNLOCKED(); | |
3861 | ||
3862 | /* Add this so we quickly catch whoever might call us in a non | |
3863 | * safe context. Nowadays, unblank_screen() isn't to be called in | |
3864 | * atomic contexts and is allowed to schedule (with the special case | |
3865 | * of oops_in_progress, but that isn't of any concern for this | |
3866 | * function. --BenH. | |
3867 | */ | |
3868 | might_sleep(); | |
3869 | ||
3870 | /* This isn't perfectly race free, but a race here would be mostly harmless, | |
3871 | * at worse, we'll do a spurrious blank and it's unlikely | |
3872 | */ | |
3873 | del_timer(&console_timer); | |
3874 | blank_timer_expired = 0; | |
3875 | ||
3876 | if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS) | |
3877 | return; | |
3878 | if (console_blanked) | |
3879 | unblank_screen(); | |
3880 | else if (blankinterval) { | |
f324edc8 | 3881 | mod_timer(&console_timer, jiffies + (blankinterval * HZ)); |
1da177e4 LT |
3882 | blank_state = blank_normal_wait; |
3883 | } | |
3884 | } | |
3885 | ||
3886 | /* | |
3887 | * Palettes | |
3888 | */ | |
3889 | ||
3890 | static void set_palette(struct vc_data *vc) | |
3891 | { | |
3892 | WARN_CONSOLE_UNLOCKED(); | |
3893 | ||
3894 | if (vc->vc_mode != KD_GRAPHICS) | |
3895 | vc->vc_sw->con_set_palette(vc, color_table); | |
3896 | } | |
3897 | ||
3898 | static int set_get_cmap(unsigned char __user *arg, int set) | |
3899 | { | |
3900 | int i, j, k; | |
3901 | ||
3902 | WARN_CONSOLE_UNLOCKED(); | |
3903 | ||
3904 | for (i = 0; i < 16; i++) | |
3905 | if (set) { | |
3906 | get_user(default_red[i], arg++); | |
3907 | get_user(default_grn[i], arg++); | |
3908 | get_user(default_blu[i], arg++); | |
3909 | } else { | |
3910 | put_user(default_red[i], arg++); | |
3911 | put_user(default_grn[i], arg++); | |
3912 | put_user(default_blu[i], arg++); | |
3913 | } | |
3914 | if (set) { | |
3915 | for (i = 0; i < MAX_NR_CONSOLES; i++) | |
3916 | if (vc_cons_allocated(i)) { | |
3917 | for (j = k = 0; j < 16; j++) { | |
3918 | vc_cons[i].d->vc_palette[k++] = default_red[j]; | |
3919 | vc_cons[i].d->vc_palette[k++] = default_grn[j]; | |
3920 | vc_cons[i].d->vc_palette[k++] = default_blu[j]; | |
3921 | } | |
3922 | set_palette(vc_cons[i].d); | |
3923 | } | |
3924 | } | |
3925 | return 0; | |
3926 | } | |
3927 | ||
3928 | /* | |
3929 | * Load palette into the DAC registers. arg points to a colour | |
3930 | * map, 3 bytes per colour, 16 colours, range from 0 to 255. | |
3931 | */ | |
3932 | ||
3933 | int con_set_cmap(unsigned char __user *arg) | |
3934 | { | |
3935 | int rc; | |
3936 | ||
3937 | acquire_console_sem(); | |
3938 | rc = set_get_cmap (arg,1); | |
3939 | release_console_sem(); | |
3940 | ||
3941 | return rc; | |
3942 | } | |
3943 | ||
3944 | int con_get_cmap(unsigned char __user *arg) | |
3945 | { | |
3946 | int rc; | |
3947 | ||
3948 | acquire_console_sem(); | |
3949 | rc = set_get_cmap (arg,0); | |
3950 | release_console_sem(); | |
3951 | ||
3952 | return rc; | |
3953 | } | |
3954 | ||
3955 | void reset_palette(struct vc_data *vc) | |
3956 | { | |
3957 | int j, k; | |
3958 | for (j=k=0; j<16; j++) { | |
3959 | vc->vc_palette[k++] = default_red[j]; | |
3960 | vc->vc_palette[k++] = default_grn[j]; | |
3961 | vc->vc_palette[k++] = default_blu[j]; | |
3962 | } | |
3963 | set_palette(vc); | |
3964 | } | |
3965 | ||
3966 | /* | |
3967 | * Font switching | |
3968 | * | |
3969 | * Currently we only support fonts up to 32 pixels wide, at a maximum height | |
3970 | * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints, | |
3971 | * depending on width) reserved for each character which is kinda wasty, but | |
3972 | * this is done in order to maintain compatibility with the EGA/VGA fonts. It | |
3973 | * is upto the actual low-level console-driver convert data into its favorite | |
3974 | * format (maybe we should add a `fontoffset' field to the `display' | |
3975 | * structure so we won't have to convert the fontdata all the time. | |
3976 | * /Jes | |
3977 | */ | |
3978 | ||
3979 | #define max_font_size 65536 | |
3980 | ||
3981 | static int con_font_get(struct vc_data *vc, struct console_font_op *op) | |
3982 | { | |
3983 | struct console_font font; | |
3984 | int rc = -EINVAL; | |
3985 | int c; | |
3986 | ||
3987 | if (vc->vc_mode != KD_TEXT) | |
3988 | return -EINVAL; | |
3989 | ||
3990 | if (op->data) { | |
3991 | font.data = kmalloc(max_font_size, GFP_KERNEL); | |
3992 | if (!font.data) | |
3993 | return -ENOMEM; | |
3994 | } else | |
3995 | font.data = NULL; | |
3996 | ||
3997 | acquire_console_sem(); | |
3998 | if (vc->vc_sw->con_font_get) | |
3999 | rc = vc->vc_sw->con_font_get(vc, &font); | |
4000 | else | |
4001 | rc = -ENOSYS; | |
4002 | release_console_sem(); | |
4003 | ||
4004 | if (rc) | |
4005 | goto out; | |
4006 | ||
4007 | c = (font.width+7)/8 * 32 * font.charcount; | |
04f378b1 | 4008 | |
1da177e4 LT |
4009 | if (op->data && font.charcount > op->charcount) |
4010 | rc = -ENOSPC; | |
4011 | if (!(op->flags & KD_FONT_FLAG_OLD)) { | |
4012 | if (font.width > op->width || font.height > op->height) | |
4013 | rc = -ENOSPC; | |
4014 | } else { | |
4015 | if (font.width != 8) | |
4016 | rc = -EIO; | |
4017 | else if ((op->height && font.height > op->height) || | |
4018 | font.height > 32) | |
4019 | rc = -ENOSPC; | |
4020 | } | |
4021 | if (rc) | |
4022 | goto out; | |
4023 | ||
4024 | op->height = font.height; | |
4025 | op->width = font.width; | |
4026 | op->charcount = font.charcount; | |
4027 | ||
4028 | if (op->data && copy_to_user(op->data, font.data, c)) | |
4029 | rc = -EFAULT; | |
4030 | ||
4031 | out: | |
4032 | kfree(font.data); | |
4033 | return rc; | |
4034 | } | |
4035 | ||
4036 | static int con_font_set(struct vc_data *vc, struct console_font_op *op) | |
4037 | { | |
4038 | struct console_font font; | |
4039 | int rc = -EINVAL; | |
4040 | int size; | |
4041 | ||
4042 | if (vc->vc_mode != KD_TEXT) | |
4043 | return -EINVAL; | |
4044 | if (!op->data) | |
4045 | return -EINVAL; | |
4046 | if (op->charcount > 512) | |
4047 | return -EINVAL; | |
4048 | if (!op->height) { /* Need to guess font height [compat] */ | |
4049 | int h, i; | |
4050 | u8 __user *charmap = op->data; | |
4051 | u8 tmp; | |
4052 | ||
4053 | /* If from KDFONTOP ioctl, don't allow things which can be done in userland, | |
4054 | so that we can get rid of this soon */ | |
4055 | if (!(op->flags & KD_FONT_FLAG_OLD)) | |
4056 | return -EINVAL; | |
4057 | for (h = 32; h > 0; h--) | |
4058 | for (i = 0; i < op->charcount; i++) { | |
4059 | if (get_user(tmp, &charmap[32*i+h-1])) | |
4060 | return -EFAULT; | |
4061 | if (tmp) | |
4062 | goto nonzero; | |
4063 | } | |
4064 | return -EINVAL; | |
4065 | nonzero: | |
4066 | op->height = h; | |
4067 | } | |
4068 | if (op->width <= 0 || op->width > 32 || op->height > 32) | |
4069 | return -EINVAL; | |
4070 | size = (op->width+7)/8 * 32 * op->charcount; | |
4071 | if (size > max_font_size) | |
4072 | return -ENOSPC; | |
4073 | font.charcount = op->charcount; | |
4074 | font.height = op->height; | |
4075 | font.width = op->width; | |
9b71ca20 JL |
4076 | font.data = memdup_user(op->data, size); |
4077 | if (IS_ERR(font.data)) | |
4078 | return PTR_ERR(font.data); | |
1da177e4 LT |
4079 | acquire_console_sem(); |
4080 | if (vc->vc_sw->con_font_set) | |
4081 | rc = vc->vc_sw->con_font_set(vc, &font, op->flags); | |
4082 | else | |
4083 | rc = -ENOSYS; | |
4084 | release_console_sem(); | |
4085 | kfree(font.data); | |
4086 | return rc; | |
4087 | } | |
4088 | ||
4089 | static int con_font_default(struct vc_data *vc, struct console_font_op *op) | |
4090 | { | |
4091 | struct console_font font = {.width = op->width, .height = op->height}; | |
4092 | char name[MAX_FONT_NAME]; | |
4093 | char *s = name; | |
4094 | int rc; | |
4095 | ||
4096 | if (vc->vc_mode != KD_TEXT) | |
4097 | return -EINVAL; | |
4098 | ||
4099 | if (!op->data) | |
4100 | s = NULL; | |
4101 | else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0) | |
4102 | return -EFAULT; | |
4103 | else | |
4104 | name[MAX_FONT_NAME - 1] = 0; | |
4105 | ||
4106 | acquire_console_sem(); | |
4107 | if (vc->vc_sw->con_font_default) | |
4108 | rc = vc->vc_sw->con_font_default(vc, &font, s); | |
4109 | else | |
4110 | rc = -ENOSYS; | |
4111 | release_console_sem(); | |
4112 | if (!rc) { | |
4113 | op->width = font.width; | |
4114 | op->height = font.height; | |
4115 | } | |
4116 | return rc; | |
4117 | } | |
4118 | ||
4119 | static int con_font_copy(struct vc_data *vc, struct console_font_op *op) | |
4120 | { | |
4121 | int con = op->height; | |
4122 | int rc; | |
4123 | ||
4124 | if (vc->vc_mode != KD_TEXT) | |
4125 | return -EINVAL; | |
4126 | ||
4127 | acquire_console_sem(); | |
4128 | if (!vc->vc_sw->con_font_copy) | |
4129 | rc = -ENOSYS; | |
4130 | else if (con < 0 || !vc_cons_allocated(con)) | |
4131 | rc = -ENOTTY; | |
4132 | else if (con == vc->vc_num) /* nothing to do */ | |
4133 | rc = 0; | |
4134 | else | |
4135 | rc = vc->vc_sw->con_font_copy(vc, con); | |
4136 | release_console_sem(); | |
4137 | return rc; | |
4138 | } | |
4139 | ||
4140 | int con_font_op(struct vc_data *vc, struct console_font_op *op) | |
4141 | { | |
4142 | switch (op->op) { | |
4143 | case KD_FONT_OP_SET: | |
4144 | return con_font_set(vc, op); | |
4145 | case KD_FONT_OP_GET: | |
4146 | return con_font_get(vc, op); | |
4147 | case KD_FONT_OP_SET_DEFAULT: | |
4148 | return con_font_default(vc, op); | |
4149 | case KD_FONT_OP_COPY: | |
4150 | return con_font_copy(vc, op); | |
4151 | } | |
4152 | return -ENOSYS; | |
4153 | } | |
4154 | ||
4155 | /* | |
4156 | * Interface exported to selection and vcs. | |
4157 | */ | |
4158 | ||
4159 | /* used by selection */ | |
4160 | u16 screen_glyph(struct vc_data *vc, int offset) | |
4161 | { | |
4162 | u16 w = scr_readw(screenpos(vc, offset, 1)); | |
4163 | u16 c = w & 0xff; | |
4164 | ||
4165 | if (w & vc->vc_hi_font_mask) | |
4166 | c |= 0x100; | |
4167 | return c; | |
4168 | } | |
f7511d5f | 4169 | EXPORT_SYMBOL_GPL(screen_glyph); |
1da177e4 LT |
4170 | |
4171 | /* used by vcs - note the word offset */ | |
4172 | unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed) | |
4173 | { | |
4174 | return screenpos(vc, 2 * w_offset, viewed); | |
4175 | } | |
4176 | ||
4177 | void getconsxy(struct vc_data *vc, unsigned char *p) | |
4178 | { | |
4179 | p[0] = vc->vc_x; | |
4180 | p[1] = vc->vc_y; | |
4181 | } | |
4182 | ||
4183 | void putconsxy(struct vc_data *vc, unsigned char *p) | |
4184 | { | |
9477e260 | 4185 | hide_cursor(vc); |
1da177e4 LT |
4186 | gotoxy(vc, p[0], p[1]); |
4187 | set_cursor(vc); | |
4188 | } | |
4189 | ||
4190 | u16 vcs_scr_readw(struct vc_data *vc, const u16 *org) | |
4191 | { | |
4192 | if ((unsigned long)org == vc->vc_pos && softcursor_original != -1) | |
4193 | return softcursor_original; | |
4194 | return scr_readw(org); | |
4195 | } | |
4196 | ||
4197 | void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org) | |
4198 | { | |
4199 | scr_writew(val, org); | |
4200 | if ((unsigned long)org == vc->vc_pos) { | |
4201 | softcursor_original = -1; | |
4202 | add_softcursor(vc); | |
4203 | } | |
4204 | } | |
4205 | ||
432c9ed2 NP |
4206 | void vcs_scr_updated(struct vc_data *vc) |
4207 | { | |
4208 | notify_update(vc); | |
4209 | } | |
4210 | ||
1da177e4 LT |
4211 | /* |
4212 | * Visible symbols for modules | |
4213 | */ | |
4214 | ||
4215 | EXPORT_SYMBOL(color_table); | |
4216 | EXPORT_SYMBOL(default_red); | |
4217 | EXPORT_SYMBOL(default_grn); | |
4218 | EXPORT_SYMBOL(default_blu); | |
4219 | EXPORT_SYMBOL(update_region); | |
4220 | EXPORT_SYMBOL(redraw_screen); | |
4221 | EXPORT_SYMBOL(vc_resize); | |
4222 | EXPORT_SYMBOL(fg_console); | |
4223 | EXPORT_SYMBOL(console_blank_hook); | |
4224 | EXPORT_SYMBOL(console_blanked); | |
4225 | EXPORT_SYMBOL(vc_cons); | |
f6c06b68 | 4226 | EXPORT_SYMBOL(global_cursor_default); |
1da177e4 LT |
4227 | #ifndef VT_SINGLE_DRIVER |
4228 | EXPORT_SYMBOL(take_over_console); | |
4229 | EXPORT_SYMBOL(give_up_console); | |
4230 | #endif |